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a2889657 | 1 | /* Display generation from window structure and buffer text. |
5d335845 | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99, 2000, 2001, 2002 |
5f5c8ee5 | 3 | Free Software Foundation, Inc. |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 | 21 | |
5f5c8ee5 GM |
22 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
23 | ||
24 | Redisplay. | |
25 | ||
26 | Emacs separates the task of updating the display from code | |
27 | modifying global state, e.g. buffer text. This way functions | |
28 | operating on buffers don't also have to be concerned with updating | |
29 | the display. | |
30 | ||
31 | Updating the display is triggered by the Lisp interpreter when it | |
32 | decides it's time to do it. This is done either automatically for | |
33 | you as part of the interpreter's command loop or as the result of | |
34 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
35 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
48400103 | 36 | let's say almost---see the description of direct update |
4b41cebb | 37 | operations, below.) |
5f5c8ee5 GM |
38 | |
39 | The following diagram shows how redisplay code is invoked. As you | |
40 | can see, Lisp calls redisplay and vice versa. Under window systems | |
41 | like X, some portions of the redisplay code are also called | |
42 | asynchronously during mouse movement or expose events. It is very | |
43 | important that these code parts do NOT use the C library (malloc, | |
44 | free) because many C libraries under Unix are not reentrant. They | |
45 | may also NOT call functions of the Lisp interpreter which could | |
46 | change the interpreter's state. If you don't follow these rules, | |
47 | you will encounter bugs which are very hard to explain. | |
48 | ||
49 | (Direct functions, see below) | |
2311178e | 50 | direct_output_for_insert, |
5f5c8ee5 GM |
51 | direct_forward_char (dispnew.c) |
52 | +---------------------------------+ | |
53 | | | | |
54 | | V | |
82a7ab23 | 55 | +--------------+ redisplay +----------------+ |
5f5c8ee5 GM |
56 | | Lisp machine |---------------->| Redisplay code |<--+ |
57 | +--------------+ (xdisp.c) +----------------+ | | |
58 | ^ | | | |
59 | +----------------------------------+ | | |
60 | Don't use this path when called | | |
61 | asynchronously! | | |
62 | | | |
63 | expose_window (asynchronous) | | |
64 | | | |
65 | X expose events -----+ | |
66 | ||
959bc044 | 67 | What does redisplay do? Obviously, it has to figure out somehow what |
5f5c8ee5 GM |
68 | has been changed since the last time the display has been updated, |
69 | and to make these changes visible. Preferably it would do that in | |
70 | a moderately intelligent way, i.e. fast. | |
71 | ||
72 | Changes in buffer text can be deduced from window and buffer | |
73 | structures, and from some global variables like `beg_unchanged' and | |
74 | `end_unchanged'. The contents of the display are additionally | |
75 | recorded in a `glyph matrix', a two-dimensional matrix of glyph | |
76 | structures. Each row in such a matrix corresponds to a line on the | |
77 | display, and each glyph in a row corresponds to a column displaying | |
78 | a character, an image, or what else. This matrix is called the | |
79 | `current glyph matrix' or `current matrix' in redisplay | |
80 | terminology. | |
81 | ||
82 | For buffer parts that have been changed since the last update, a | |
83 | second glyph matrix is constructed, the so called `desired glyph | |
84 | matrix' or short `desired matrix'. Current and desired matrix are | |
85 | then compared to find a cheap way to update the display, e.g. by | |
86 | reusing part of the display by scrolling lines. | |
87 | ||
88 | ||
89 | Direct operations. | |
90 | ||
48400103 | 91 | You will find a lot of redisplay optimizations when you start |
5f5c8ee5 GM |
92 | looking at the innards of redisplay. The overall goal of all these |
93 | optimizations is to make redisplay fast because it is done | |
94 | frequently. | |
95 | ||
96 | Two optimizations are not found in xdisp.c. These are the direct | |
97 | operations mentioned above. As the name suggests they follow a | |
98 | different principle than the rest of redisplay. Instead of | |
99 | building a desired matrix and then comparing it with the current | |
100 | display, they perform their actions directly on the display and on | |
101 | the current matrix. | |
102 | ||
103 | One direct operation updates the display after one character has | |
104 | been entered. The other one moves the cursor by one position | |
105 | forward or backward. You find these functions under the names | |
106 | `direct_output_for_insert' and `direct_output_forward_char' in | |
107 | dispnew.c. | |
108 | ||
2311178e | 109 | |
5f5c8ee5 GM |
110 | Desired matrices. |
111 | ||
112 | Desired matrices are always built per Emacs window. The function | |
113 | `display_line' is the central function to look at if you are | |
114 | interested. It constructs one row in a desired matrix given an | |
115 | iterator structure containing both a buffer position and a | |
116 | description of the environment in which the text is to be | |
117 | displayed. But this is too early, read on. | |
118 | ||
119 | Characters and pixmaps displayed for a range of buffer text depend | |
120 | on various settings of buffers and windows, on overlays and text | |
121 | properties, on display tables, on selective display. The good news | |
122 | is that all this hairy stuff is hidden behind a small set of | |
959bc044 | 123 | interface functions taking an iterator structure (struct it) |
5f5c8ee5 GM |
124 | argument. |
125 | ||
48400103 | 126 | Iteration over things to be displayed is then simple. It is |
1178ddde GM |
127 | started by initializing an iterator with a call to init_iterator. |
128 | Calls to get_next_display_element fill the iterator structure with | |
129 | relevant information about the next thing to display. Calls to | |
5f5c8ee5 GM |
130 | set_iterator_to_next move the iterator to the next thing. |
131 | ||
132 | Besides this, an iterator also contains information about the | |
133 | display environment in which glyphs for display elements are to be | |
134 | produced. It has fields for the width and height of the display, | |
135 | the information whether long lines are truncated or continued, a | |
136 | current X and Y position, and lots of other stuff you can better | |
137 | see in dispextern.h. | |
138 | ||
139 | Glyphs in a desired matrix are normally constructed in a loop | |
140 | calling get_next_display_element and then produce_glyphs. The call | |
141 | to produce_glyphs will fill the iterator structure with pixel | |
142 | information about the element being displayed and at the same time | |
143 | produce glyphs for it. If the display element fits on the line | |
144 | being displayed, set_iterator_to_next is called next, otherwise the | |
145 | glyphs produced are discarded. | |
146 | ||
147 | ||
148 | Frame matrices. | |
149 | ||
150 | That just couldn't be all, could it? What about terminal types not | |
151 | supporting operations on sub-windows of the screen? To update the | |
152 | display on such a terminal, window-based glyph matrices are not | |
153 | well suited. To be able to reuse part of the display (scrolling | |
154 | lines up and down), we must instead have a view of the whole | |
155 | screen. This is what `frame matrices' are for. They are a trick. | |
156 | ||
157 | Frames on terminals like above have a glyph pool. Windows on such | |
158 | a frame sub-allocate their glyph memory from their frame's glyph | |
159 | pool. The frame itself is given its own glyph matrices. By | |
160 | coincidence---or maybe something else---rows in window glyph | |
161 | matrices are slices of corresponding rows in frame matrices. Thus | |
162 | writing to window matrices implicitly updates a frame matrix which | |
163 | provides us with the view of the whole screen that we originally | |
164 | wanted to have without having to move many bytes around. To be | |
165 | honest, there is a little bit more done, but not much more. If you | |
166 | plan to extend that code, take a look at dispnew.c. The function | |
167 | build_frame_matrix is a good starting point. */ | |
a2889657 | 168 | |
18160b98 | 169 | #include <config.h> |
a2889657 | 170 | #include <stdio.h> |
7ee72033 | 171 | |
a2889657 | 172 | #include "lisp.h" |
546a4f00 | 173 | #include "keyboard.h" |
44fa5b1e | 174 | #include "frame.h" |
a2889657 JB |
175 | #include "window.h" |
176 | #include "termchar.h" | |
177 | #include "dispextern.h" | |
178 | #include "buffer.h" | |
1c9241f5 | 179 | #include "charset.h" |
a2889657 JB |
180 | #include "indent.h" |
181 | #include "commands.h" | |
182 | #include "macros.h" | |
183 | #include "disptab.h" | |
30c566e4 | 184 | #include "termhooks.h" |
b0a0fbda | 185 | #include "intervals.h" |
1c9241f5 KH |
186 | #include "coding.h" |
187 | #include "process.h" | |
dfcf069d | 188 | #include "region-cache.h" |
0ef75e87 | 189 | #include "fontset.h" |
dfcf069d | 190 | |
6d55d620 | 191 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
192 | #include "xterm.h" |
193 | #endif | |
a75dfea0 AI |
194 | #ifdef WINDOWSNT |
195 | #include "w32term.h" | |
196 | #endif | |
e0f712ba | 197 | #ifdef MAC_OS |
1a578e9b AC |
198 | #include "macterm.h" |
199 | #endif | |
a2889657 | 200 | |
5f5c8ee5 GM |
201 | #define INFINITY 10000000 |
202 | ||
488dd4c4 JD |
203 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
204 | || defined (USE_GTK) | |
2e621225 | 205 | extern void set_frame_menubar P_ ((struct frame *f, int, int)); |
cd6dfed6 | 206 | extern int pending_menu_activation; |
76412d64 RS |
207 | #endif |
208 | ||
a2889657 JB |
209 | extern int interrupt_input; |
210 | extern int command_loop_level; | |
211 | ||
b6436d4e | 212 | extern int minibuffer_auto_raise; |
b2b5455d | 213 | extern Lisp_Object Vminibuffer_list; |
b6436d4e | 214 | |
c4628384 | 215 | extern Lisp_Object Qface; |
fec8f23e | 216 | extern Lisp_Object Qmode_line, Qmode_line_inactive, Qheader_line; |
c4628384 | 217 | |
399164b4 KH |
218 | extern Lisp_Object Voverriding_local_map; |
219 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 220 | extern Lisp_Object Qmenu_item; |
399164b4 | 221 | |
d46fb96a | 222 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 223 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 224 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 225 | Lisp_Object Qinhibit_point_motion_hooks; |
0fcf414f | 226 | Lisp_Object QCeval, Qwhen, QCfile, QCdata, QCpropertize; |
5f5c8ee5 | 227 | Lisp_Object Qfontified; |
6422c1d7 | 228 | Lisp_Object Qgrow_only; |
869fb12c | 229 | Lisp_Object Qinhibit_eval_during_redisplay; |
b384d6f8 | 230 | Lisp_Object Qbuffer_position, Qposition, Qobject; |
5f5c8ee5 | 231 | |
cfe03a41 KS |
232 | /* Cursor shapes */ |
233 | Lisp_Object Qbar, Qhbar, Qbox, Qhollow; | |
234 | ||
c53a1624 RS |
235 | Lisp_Object Qrisky_local_variable; |
236 | ||
7033d6df RS |
237 | /* Holds the list (error). */ |
238 | Lisp_Object list_of_error; | |
239 | ||
5f5c8ee5 GM |
240 | /* Functions called to fontify regions of text. */ |
241 | ||
242 | Lisp_Object Vfontification_functions; | |
243 | Lisp_Object Qfontification_functions; | |
244 | ||
e037b9ec | 245 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
246 | over them. */ |
247 | ||
e037b9ec | 248 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 249 | |
e037b9ec | 250 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 251 | |
35a41507 | 252 | Lisp_Object Vtool_bar_button_margin; |
5f5c8ee5 | 253 | |
e037b9ec | 254 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 255 | |
31ade731 | 256 | EMACS_INT tool_bar_button_relief; |
5f5c8ee5 | 257 | |
e037b9ec | 258 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
259 | items are visible, and no blank lines remain. */ |
260 | ||
e037b9ec | 261 | int auto_resize_tool_bars_p; |
399164b4 | 262 | |
735c094c KH |
263 | /* Non-nil means don't actually do any redisplay. */ |
264 | ||
265 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
266 | ||
30a3f61c GM |
267 | /* Non-zero means Lisp evaluation during redisplay is inhibited. */ |
268 | ||
869fb12c | 269 | int inhibit_eval_during_redisplay; |
30a3f61c | 270 | |
5f5c8ee5 GM |
271 | /* Names of text properties relevant for redisplay. */ |
272 | ||
a7e27ef7 | 273 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
4b41cebb | 274 | extern Lisp_Object Qface, Qinvisible, Qwidth; |
5f5c8ee5 GM |
275 | |
276 | /* Symbols used in text property values. */ | |
277 | ||
278 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 279 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 280 | Lisp_Object Qmargin; |
a7e27ef7 | 281 | extern Lisp_Object Qheight; |
5f5c8ee5 | 282 | |
8f897821 | 283 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 284 | |
8f897821 | 285 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
286 | |
287 | /* Name of the face used to highlight trailing whitespace. */ | |
288 | ||
289 | Lisp_Object Qtrailing_whitespace; | |
290 | ||
291 | /* The symbol `image' which is the car of the lists used to represent | |
292 | images in Lisp. */ | |
293 | ||
294 | Lisp_Object Qimage; | |
295 | ||
296 | /* Non-zero means print newline to stdout before next mini-buffer | |
297 | message. */ | |
a2889657 JB |
298 | |
299 | int noninteractive_need_newline; | |
300 | ||
5f5c8ee5 | 301 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 302 | |
3c6595e0 | 303 | static int message_log_need_newline; |
f88eb0b6 | 304 | |
b14bc55e RS |
305 | /* Three markers that message_dolog uses. |
306 | It could allocate them itself, but that causes trouble | |
307 | in handling memory-full errors. */ | |
308 | static Lisp_Object message_dolog_marker1; | |
309 | static Lisp_Object message_dolog_marker2; | |
310 | static Lisp_Object message_dolog_marker3; | |
5f5c8ee5 GM |
311 | \f |
312 | /* The buffer position of the first character appearing entirely or | |
313 | partially on the line of the selected window which contains the | |
314 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
315 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 316 | |
5f5c8ee5 | 317 | static struct text_pos this_line_start_pos; |
a2889657 | 318 | |
5f5c8ee5 GM |
319 | /* Number of characters past the end of the line above, including the |
320 | terminating newline. */ | |
321 | ||
322 | static struct text_pos this_line_end_pos; | |
323 | ||
324 | /* The vertical positions and the height of this line. */ | |
a2889657 | 325 | |
a2889657 | 326 | static int this_line_vpos; |
5f5c8ee5 GM |
327 | static int this_line_y; |
328 | static int this_line_pixel_height; | |
329 | ||
330 | /* X position at which this display line starts. Usually zero; | |
331 | negative if first character is partially visible. */ | |
332 | ||
333 | static int this_line_start_x; | |
a2889657 | 334 | |
5f5c8ee5 | 335 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 336 | |
a2889657 JB |
337 | static struct buffer *this_line_buffer; |
338 | ||
5f5c8ee5 GM |
339 | /* Nonzero means truncate lines in all windows less wide than the |
340 | frame. */ | |
a2889657 | 341 | |
a2889657 JB |
342 | int truncate_partial_width_windows; |
343 | ||
7bbe686f | 344 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 345 | |
7bbe686f | 346 | int unibyte_display_via_language_environment; |
2311178e | 347 | |
5f5c8ee5 GM |
348 | /* Nonzero means we have more than one non-mini-buffer-only frame. |
349 | Not guaranteed to be accurate except while parsing | |
350 | frame-title-format. */ | |
7bbe686f | 351 | |
d39b6696 KH |
352 | int multiple_frames; |
353 | ||
a2889657 JB |
354 | Lisp_Object Vglobal_mode_string; |
355 | ||
356 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 357 | |
a2889657 JB |
358 | Lisp_Object Voverlay_arrow_position; |
359 | ||
5f5c8ee5 GM |
360 | /* String to display for the arrow. Only used on terminal frames. */ |
361 | ||
a2889657 JB |
362 | Lisp_Object Voverlay_arrow_string; |
363 | ||
5f5c8ee5 GM |
364 | /* Values of those variables at last redisplay. However, if |
365 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
366 | numerical position. */ | |
367 | ||
d45de95b RS |
368 | static Lisp_Object last_arrow_position, last_arrow_string; |
369 | ||
5f5c8ee5 GM |
370 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
371 | ||
d39b6696 KH |
372 | Lisp_Object Vframe_title_format; |
373 | ||
5f5c8ee5 GM |
374 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
375 | ||
d39b6696 KH |
376 | Lisp_Object Vicon_title_format; |
377 | ||
08b610e4 RS |
378 | /* List of functions to call when a window's size changes. These |
379 | functions get one arg, a frame on which one or more windows' sizes | |
380 | have changed. */ | |
5f5c8ee5 | 381 | |
08b610e4 RS |
382 | static Lisp_Object Vwindow_size_change_functions; |
383 | ||
0bca8940 | 384 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 385 | |
a2889657 | 386 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 387 | |
5f5c8ee5 | 388 | static int overlay_arrow_seen; |
ca26e1c8 | 389 | |
fba9ce76 | 390 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 391 | |
5f5c8ee5 GM |
392 | int highlight_nonselected_windows; |
393 | ||
394 | /* If cursor motion alone moves point off frame, try scrolling this | |
395 | many lines up or down if that will bring it back. */ | |
396 | ||
31ade731 | 397 | static EMACS_INT scroll_step; |
a2889657 | 398 | |
4b41cebb | 399 | /* Nonzero means scroll just far enough to bring point back on the |
5f5c8ee5 GM |
400 | screen, when appropriate. */ |
401 | ||
31ade731 | 402 | static EMACS_INT scroll_conservatively; |
0789adb2 | 403 | |
5f5c8ee5 GM |
404 | /* Recenter the window whenever point gets within this many lines of |
405 | the top or bottom of the window. This value is translated into a | |
406 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
407 | there is really a fixed pixel height scroll margin. */ | |
408 | ||
31ade731 | 409 | EMACS_INT scroll_margin; |
9afd2168 | 410 | |
5f5c8ee5 GM |
411 | /* Number of windows showing the buffer of the selected window (or |
412 | another buffer with the same base buffer). keyboard.c refers to | |
413 | this. */ | |
a2889657 | 414 | |
a2889657 JB |
415 | int buffer_shared; |
416 | ||
5f5c8ee5 | 417 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 418 | |
5f5c8ee5 | 419 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 420 | |
1862a24e MB |
421 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
422 | (this slightly odd definition is for compatibility with previous versions | |
423 | of emacs), non-zero means display them using their respective faces. | |
424 | ||
425 | This variable is deprecated. */ | |
a2889657 | 426 | |
a2889657 JB |
427 | int mode_line_inverse_video; |
428 | ||
5f5c8ee5 GM |
429 | /* Prompt to display in front of the mini-buffer contents. */ |
430 | ||
8c5b6a0a | 431 | Lisp_Object minibuf_prompt; |
a2889657 | 432 | |
5f5c8ee5 GM |
433 | /* Width of current mini-buffer prompt. Only set after display_line |
434 | of the line that contains the prompt. */ | |
435 | ||
a2889657 | 436 | int minibuf_prompt_width; |
5f5c8ee5 | 437 | |
5f5c8ee5 GM |
438 | /* This is the window where the echo area message was displayed. It |
439 | is always a mini-buffer window, but it may not be the same window | |
440 | currently active as a mini-buffer. */ | |
441 | ||
73af359d RS |
442 | Lisp_Object echo_area_window; |
443 | ||
c6e89d6c GM |
444 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
445 | pushes the current message and the value of | |
446 | message_enable_multibyte on the stack, the function restore_message | |
447 | pops the stack and displays MESSAGE again. */ | |
448 | ||
449 | Lisp_Object Vmessage_stack; | |
450 | ||
a3788d53 RS |
451 | /* Nonzero means multibyte characters were enabled when the echo area |
452 | message was specified. */ | |
5f5c8ee5 | 453 | |
a3788d53 RS |
454 | int message_enable_multibyte; |
455 | ||
4b41cebb | 456 | /* Nonzero if we should redraw the mode lines on the next redisplay. */ |
5f5c8ee5 | 457 | |
a2889657 JB |
458 | int update_mode_lines; |
459 | ||
5f5c8ee5 | 460 | /* Nonzero if window sizes or contents have changed since last |
4b41cebb | 461 | redisplay that finished. */ |
5f5c8ee5 | 462 | |
a2889657 JB |
463 | int windows_or_buffers_changed; |
464 | ||
5fb96e96 RS |
465 | /* Nonzero means a frame's cursor type has been changed. */ |
466 | ||
467 | int cursor_type_changed; | |
468 | ||
5f5c8ee5 GM |
469 | /* Nonzero after display_mode_line if %l was used and it displayed a |
470 | line number. */ | |
471 | ||
aa6d10fa RS |
472 | int line_number_displayed; |
473 | ||
474 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 475 | |
090703f4 | 476 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 477 | |
4b41cebb | 478 | /* Line width to consider when repositioning for line number display. */ |
5d121aec | 479 | |
31ade731 | 480 | static EMACS_INT line_number_display_limit_width; |
5d121aec | 481 | |
5f5c8ee5 GM |
482 | /* Number of lines to keep in the message log buffer. t means |
483 | infinite. nil means don't log at all. */ | |
484 | ||
5992c4f7 | 485 | Lisp_Object Vmessage_log_max; |
d45de95b | 486 | |
6a94510a GM |
487 | /* The name of the *Messages* buffer, a string. */ |
488 | ||
489 | static Lisp_Object Vmessages_buffer_name; | |
490 | ||
c6e89d6c GM |
491 | /* Current, index 0, and last displayed echo area message. Either |
492 | buffers from echo_buffers, or nil to indicate no message. */ | |
493 | ||
494 | Lisp_Object echo_area_buffer[2]; | |
495 | ||
496 | /* The buffers referenced from echo_area_buffer. */ | |
497 | ||
498 | static Lisp_Object echo_buffer[2]; | |
499 | ||
500 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
501 | ||
502 | static Lisp_Object Vwith_echo_area_save_vector; | |
503 | ||
504 | /* Non-zero means display_echo_area should display the last echo area | |
505 | message again. Set by redisplay_preserve_echo_area. */ | |
506 | ||
507 | static int display_last_displayed_message_p; | |
508 | ||
509 | /* Nonzero if echo area is being used by print; zero if being used by | |
510 | message. */ | |
511 | ||
512 | int message_buf_print; | |
513 | ||
e1477f43 GM |
514 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
515 | ||
516 | Lisp_Object Qinhibit_menubar_update; | |
517 | int inhibit_menubar_update; | |
518 | ||
9142dd5b GM |
519 | /* Maximum height for resizing mini-windows. Either a float |
520 | specifying a fraction of the available height, or an integer | |
521 | specifying a number of lines. */ | |
c6e89d6c | 522 | |
ad4f174e GM |
523 | Lisp_Object Vmax_mini_window_height; |
524 | ||
525 | /* Non-zero means messages should be displayed with truncated | |
526 | lines instead of being continued. */ | |
527 | ||
528 | int message_truncate_lines; | |
529 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 530 | |
6e019995 GM |
531 | /* Set to 1 in clear_message to make redisplay_internal aware |
532 | of an emptied echo area. */ | |
533 | ||
534 | static int message_cleared_p; | |
535 | ||
d6d26ed3 GM |
536 | /* Non-zero means we want a hollow cursor in windows that are not |
537 | selected. Zero means there's no cursor in such windows. */ | |
538 | ||
cfe03a41 | 539 | Lisp_Object Vcursor_in_non_selected_windows; |
af79bccb | 540 | Lisp_Object Qcursor_in_non_selected_windows; |
d6d26ed3 | 541 | |
cfe03a41 KS |
542 | /* How to blink the default frame cursor off. */ |
543 | Lisp_Object Vblink_cursor_alist; | |
544 | ||
5f5c8ee5 GM |
545 | /* A scratch glyph row with contents used for generating truncation |
546 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 547 | |
5f5c8ee5 GM |
548 | #define MAX_SCRATCH_GLYPHS 100 |
549 | struct glyph_row scratch_glyph_row; | |
550 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 551 | |
5f5c8ee5 GM |
552 | /* Ascent and height of the last line processed by move_it_to. */ |
553 | ||
554 | static int last_max_ascent, last_height; | |
555 | ||
21fdfb65 GM |
556 | /* Non-zero if there's a help-echo in the echo area. */ |
557 | ||
558 | int help_echo_showing_p; | |
559 | ||
04612a64 GM |
560 | /* If >= 0, computed, exact values of mode-line and header-line height |
561 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
562 | CURRENT_HEADER_LINE_HEIGHT. */ | |
563 | ||
564 | int current_mode_line_height, current_header_line_height; | |
565 | ||
5f5c8ee5 | 566 | /* The maximum distance to look ahead for text properties. Values |
2311178e | 567 | that are too small let us call compute_char_face and similar |
5f5c8ee5 GM |
568 | functions too often which is expensive. Values that are too large |
569 | let us call compute_char_face and alike too often because we | |
570 | might not be interested in text properties that far away. */ | |
571 | ||
572 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
573 | ||
47589c8c GM |
574 | #if GLYPH_DEBUG |
575 | ||
76cb5e06 GM |
576 | /* Variables to turn off display optimizations from Lisp. */ |
577 | ||
578 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
579 | int inhibit_try_cursor_movement; | |
580 | ||
5f5c8ee5 GM |
581 | /* Non-zero means print traces of redisplay if compiled with |
582 | GLYPH_DEBUG != 0. */ | |
583 | ||
5f5c8ee5 | 584 | int trace_redisplay_p; |
47589c8c | 585 | |
546a4f00 | 586 | #endif /* GLYPH_DEBUG */ |
47589c8c | 587 | |
546a4f00 AI |
588 | #ifdef DEBUG_TRACE_MOVE |
589 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
590 | int trace_move; |
591 | ||
47589c8c GM |
592 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
593 | #else | |
91c3f500 | 594 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 595 | #endif |
2311178e | 596 | |
d475bcb8 GM |
597 | /* Non-zero means automatically scroll windows horizontally to make |
598 | point visible. */ | |
599 | ||
600 | int automatic_hscrolling_p; | |
601 | ||
1df7e8f0 EZ |
602 | /* How close to the margin can point get before the window is scrolled |
603 | horizontally. */ | |
5d335845 | 604 | EMACS_INT hscroll_margin; |
1df7e8f0 EZ |
605 | |
606 | /* How much to scroll horizontally when point is inside the above margin. */ | |
e76d28d5 | 607 | Lisp_Object Vhscroll_step; |
1df7e8f0 | 608 | |
e00daaa0 GM |
609 | /* A list of symbols, one for each supported image type. */ |
610 | ||
611 | Lisp_Object Vimage_types; | |
612 | ||
6422c1d7 | 613 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 614 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
615 | display. If `grow-only', let mini-windows grow only until they |
616 | become empty. */ | |
617 | ||
618 | Lisp_Object Vresize_mini_windows; | |
619 | ||
82a7ab23 RS |
620 | /* Buffer being redisplayed -- for redisplay_window_error. */ |
621 | ||
622 | struct buffer *displayed_buffer; | |
623 | ||
5f5c8ee5 GM |
624 | /* Value returned from text property handlers (see below). */ |
625 | ||
626 | enum prop_handled | |
3c6595e0 | 627 | { |
5f5c8ee5 GM |
628 | HANDLED_NORMALLY, |
629 | HANDLED_RECOMPUTE_PROPS, | |
630 | HANDLED_OVERLAY_STRING_CONSUMED, | |
631 | HANDLED_RETURN | |
632 | }; | |
3c6595e0 | 633 | |
5f5c8ee5 GM |
634 | /* A description of text properties that redisplay is interested |
635 | in. */ | |
3c6595e0 | 636 | |
5f5c8ee5 GM |
637 | struct props |
638 | { | |
639 | /* The name of the property. */ | |
640 | Lisp_Object *name; | |
90adcf20 | 641 | |
5f5c8ee5 GM |
642 | /* A unique index for the property. */ |
643 | enum prop_idx idx; | |
644 | ||
645 | /* A handler function called to set up iterator IT from the property | |
646 | at IT's current position. Value is used to steer handle_stop. */ | |
647 | enum prop_handled (*handler) P_ ((struct it *it)); | |
648 | }; | |
649 | ||
650 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
651 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
652 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 653 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
654 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
655 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
656 | ||
657 | /* Properties handled by iterators. */ | |
658 | ||
659 | static struct props it_props[] = | |
5992c4f7 | 660 | { |
5f5c8ee5 GM |
661 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
662 | /* Handle `face' before `display' because some sub-properties of | |
663 | `display' need to know the face. */ | |
664 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
665 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
666 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 667 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
668 | {NULL, 0, NULL} |
669 | }; | |
5992c4f7 | 670 | |
5f5c8ee5 GM |
671 | /* Value is the position described by X. If X is a marker, value is |
672 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 673 | |
5f5c8ee5 | 674 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 675 | |
5f5c8ee5 | 676 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 677 | |
5f5c8ee5 GM |
678 | enum move_it_result |
679 | { | |
680 | /* Not used. Undefined value. */ | |
681 | MOVE_UNDEFINED, | |
bab29e15 | 682 | |
5f5c8ee5 GM |
683 | /* Move ended at the requested buffer position or ZV. */ |
684 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 685 | |
5f5c8ee5 GM |
686 | /* Move ended at the requested X pixel position. */ |
687 | MOVE_X_REACHED, | |
12adba34 | 688 | |
5f5c8ee5 GM |
689 | /* Move within a line ended at the end of a line that must be |
690 | continued. */ | |
691 | MOVE_LINE_CONTINUED, | |
2311178e | 692 | |
5f5c8ee5 GM |
693 | /* Move within a line ended at the end of a line that would |
694 | be displayed truncated. */ | |
695 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 696 | |
5f5c8ee5 GM |
697 | /* Move within a line ended at a line end. */ |
698 | MOVE_NEWLINE_OR_CR | |
699 | }; | |
12adba34 | 700 | |
1987b083 RS |
701 | /* This counter is used to clear the face cache every once in a while |
702 | in redisplay_internal. It is incremented for each redisplay. | |
703 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
704 | cleared. */ | |
705 | ||
706 | #define CLEAR_FACE_CACHE_COUNT 500 | |
707 | static int clear_face_cache_count; | |
708 | ||
709 | /* Record the previous terminal frame we displayed. */ | |
710 | ||
711 | static struct frame *previous_terminal_frame; | |
712 | ||
713 | /* Non-zero while redisplay_internal is in progress. */ | |
714 | ||
715 | int redisplaying_p; | |
716 | ||
26683087 RS |
717 | /* Non-zero means don't free realized faces. Bound while freeing |
718 | realized faces is dangerous because glyph matrices might still | |
719 | reference them. */ | |
1987b083 | 720 | |
26683087 RS |
721 | int inhibit_free_realized_faces; |
722 | Lisp_Object Qinhibit_free_realized_faces; | |
ff6c30e5 | 723 | |
5f5c8ee5 GM |
724 | \f |
725 | /* Function prototypes. */ | |
726 | ||
5a08cbaf | 727 | static void setup_for_ellipsis P_ ((struct it *)); |
43c09969 | 728 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
74bd6d65 GM |
729 | static int single_display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
730 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); | |
cafafe0b | 731 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 732 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 733 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
734 | |
735 | #if 0 | |
2e621225 | 736 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
737 | #endif |
738 | ||
2e621225 GM |
739 | static int next_element_from_ellipsis P_ ((struct it *)); |
740 | static void pint2str P_ ((char *, int, int)); | |
741 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
742 | struct text_pos)); | |
743 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
744 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
745 | static void store_frame_title_char P_ ((char)); | |
50f80c2f | 746 | static int store_frame_title P_ ((const unsigned char *, int, int)); |
2e621225 GM |
747 | static void x_consider_frame_title P_ ((Lisp_Object)); |
748 | static void handle_stop P_ ((struct it *)); | |
749 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 750 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 751 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
752 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
753 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 754 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
755 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
756 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 757 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
758 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
759 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
760 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 761 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
762 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
763 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 764 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
50f80c2f | 765 | static int string_char_and_length P_ ((const unsigned char *, int, int *)); |
5f5c8ee5 GM |
766 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
767 | struct text_pos)); | |
768 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 769 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 GM |
770 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
771 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
772 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 773 | static int append_space P_ ((struct it *, int)); |
cb617e7c | 774 | static int make_cursor_line_fully_visible P_ ((struct window *)); |
03b0a4b4 | 775 | static int try_scrolling P_ ((Lisp_Object, int, EMACS_INT, EMACS_INT, int, int)); |
47589c8c | 776 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
777 | static int trailing_whitespace_p P_ ((int)); |
778 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
779 | static void push_it P_ ((struct it *)); |
780 | static void pop_it P_ ((struct it *)); | |
781 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
782 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 783 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
784 | static void redisplay_windows P_ ((Lisp_Object)); |
785 | static void redisplay_window P_ ((Lisp_Object, int)); | |
82a7ab23 RS |
786 | static Lisp_Object redisplay_window_error (); |
787 | static Lisp_Object redisplay_window_0 P_ ((Lisp_Object)); | |
788 | static Lisp_Object redisplay_window_1 P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
789 | static void update_menu_bar P_ ((struct frame *, int)); |
790 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
791 | static int try_window_id P_ ((struct window *)); | |
792 | static int display_line P_ ((struct it *)); | |
715e84c9 | 793 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 794 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
c53a1624 | 795 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object, Lisp_Object, int)); |
fec8f23e | 796 | static int store_mode_line_string P_ ((char *, Lisp_Object, int, int, int, Lisp_Object)); |
72f62cb5 | 797 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
798 | static void display_menu_bar P_ ((struct window *)); |
799 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
800 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
801 | int, int, struct it *, int, int, int, int)); | |
802 | static void compute_line_metrics P_ ((struct it *)); | |
803 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 804 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 805 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
806 | static void reseat P_ ((struct it *, struct text_pos, int)); |
807 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
808 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
809 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 810 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
811 | static int next_element_from_display_vector P_ ((struct it *)); |
812 | static int next_element_from_string P_ ((struct it *)); | |
813 | static int next_element_from_c_string P_ ((struct it *)); | |
814 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 815 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
816 | static int next_element_from_image P_ ((struct it *)); |
817 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 818 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
819 | static int init_from_display_pos P_ ((struct it *, struct window *, |
820 | struct display_pos *)); | |
5f5c8ee5 GM |
821 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
822 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
823 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
824 | int, int, int)); | |
825 | void move_it_vertically_backward P_ ((struct it *, int)); | |
826 | static void init_to_row_start P_ ((struct it *, struct window *, | |
827 | struct glyph_row *)); | |
47d57b22 GM |
828 | static int init_to_row_end P_ ((struct it *, struct window *, |
829 | struct glyph_row *)); | |
5f5c8ee5 | 830 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 831 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
832 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
833 | Lisp_Object, int)); | |
834 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
835 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
836 | static int number_of_chars P_ ((unsigned char *, int)); | |
837 | static void compute_stop_pos P_ ((struct it *)); | |
838 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
839 | Lisp_Object)); | |
840 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
841 | static int next_overlay_change P_ ((int)); | |
842 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
a61b7058 GM |
843 | Lisp_Object, struct text_pos *, |
844 | int)); | |
06a12811 | 845 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
846 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
847 | struct window *)); | |
5f5c8ee5 GM |
848 | |
849 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
850 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 851 | |
5f5c8ee5 | 852 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 853 | |
e037b9ec GM |
854 | static void update_tool_bar P_ ((struct frame *, int)); |
855 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
856 | static int redisplay_tool_bar P_ ((struct frame *)); | |
857 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 858 | |
5f5c8ee5 | 859 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 860 | |
5f5c8ee5 GM |
861 | \f |
862 | /*********************************************************************** | |
863 | Window display dimensions | |
864 | ***********************************************************************/ | |
12adba34 | 865 | |
40a301b3 RS |
866 | /* Return the bottom boundary y-position for text lines in window W. |
867 | This is the first y position at which a line cannot start. | |
868 | It is relative to the top of the window. | |
869 | ||
870 | This is the height of W minus the height of a mode line, if any. */ | |
5f5c8ee5 GM |
871 | |
872 | INLINE int | |
873 | window_text_bottom_y (w) | |
874 | struct window *w; | |
875 | { | |
876 | struct frame *f = XFRAME (w->frame); | |
877 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
1a578e9b | 878 | |
5f5c8ee5 GM |
879 | if (WINDOW_WANTS_MODELINE_P (w)) |
880 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
881 | return height; | |
f88eb0b6 KH |
882 | } |
883 | ||
f82aff7c | 884 | |
5f5c8ee5 | 885 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 886 | means return the total width of W, not including fringes to |
5f5c8ee5 | 887 | the left and right of the window. */ |
ff6c30e5 | 888 | |
5f5c8ee5 GM |
889 | INLINE int |
890 | window_box_width (w, area) | |
891 | struct window *w; | |
892 | int area; | |
893 | { | |
894 | struct frame *f = XFRAME (w->frame); | |
895 | int width = XFASTINT (w->width); | |
2311178e | 896 | |
5f5c8ee5 | 897 | if (!w->pseudo_window_p) |
ff6c30e5 | 898 | { |
b46952ae | 899 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FRINGE_COLS (f); |
2311178e | 900 | |
5f5c8ee5 GM |
901 | if (area == TEXT_AREA) |
902 | { | |
903 | if (INTEGERP (w->left_margin_width)) | |
904 | width -= XFASTINT (w->left_margin_width); | |
905 | if (INTEGERP (w->right_margin_width)) | |
906 | width -= XFASTINT (w->right_margin_width); | |
907 | } | |
908 | else if (area == LEFT_MARGIN_AREA) | |
909 | width = (INTEGERP (w->left_margin_width) | |
910 | ? XFASTINT (w->left_margin_width) : 0); | |
911 | else if (area == RIGHT_MARGIN_AREA) | |
912 | width = (INTEGERP (w->right_margin_width) | |
913 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 914 | } |
5f5c8ee5 GM |
915 | |
916 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 917 | } |
1adc55de | 918 | |
1adc55de | 919 | |
5f5c8ee5 | 920 | /* Return the pixel height of the display area of window W, not |
4b41cebb | 921 | including mode lines of W, if any. */ |
f88eb0b6 | 922 | |
5f5c8ee5 GM |
923 | INLINE int |
924 | window_box_height (w) | |
925 | struct window *w; | |
f88eb0b6 | 926 | { |
5f5c8ee5 GM |
927 | struct frame *f = XFRAME (w->frame); |
928 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
7ecd4937 GM |
929 | |
930 | xassert (height >= 0); | |
2311178e | 931 | |
d9c9e99c MB |
932 | /* Note: the code below that determines the mode-line/header-line |
933 | height is essentially the same as that contained in the macro | |
934 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
935 | the appropriate glyph row has its `mode_line_p' flag set, | |
936 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
937 | ||
5f5c8ee5 | 938 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
939 | { |
940 | struct glyph_row *ml_row | |
941 | = (w->current_matrix && w->current_matrix->rows | |
942 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
943 | : 0); | |
944 | if (ml_row && ml_row->mode_line_p) | |
945 | height -= ml_row->height; | |
946 | else | |
96d2320f | 947 | height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w)); |
97dff879 | 948 | } |
5f5c8ee5 | 949 | |
045dee35 | 950 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
951 | { |
952 | struct glyph_row *hl_row | |
953 | = (w->current_matrix && w->current_matrix->rows | |
954 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
955 | : 0); | |
956 | if (hl_row && hl_row->mode_line_p) | |
957 | height -= hl_row->height; | |
958 | else | |
959 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
960 | } | |
5f5c8ee5 | 961 | |
7c75be36 PJ |
962 | /* With a very small font and a mode-line that's taller than |
963 | default, we might end up with a negative height. */ | |
964 | return max (0, height); | |
5992c4f7 KH |
965 | } |
966 | ||
967 | ||
5f5c8ee5 GM |
968 | /* Return the frame-relative coordinate of the left edge of display |
969 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 970 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 971 | |
5f5c8ee5 GM |
972 | INLINE int |
973 | window_box_left (w, area) | |
974 | struct window *w; | |
975 | int area; | |
90adcf20 | 976 | { |
5f5c8ee5 GM |
977 | struct frame *f = XFRAME (w->frame); |
978 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 979 | |
5f5c8ee5 | 980 | if (!w->pseudo_window_p) |
90adcf20 | 981 | { |
5f5c8ee5 | 982 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
b46952ae | 983 | + FRAME_LEFT_FRINGE_WIDTH (f)); |
2311178e | 984 | |
5f5c8ee5 GM |
985 | if (area == TEXT_AREA) |
986 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
987 | else if (area == RIGHT_MARGIN_AREA) | |
988 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
989 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 990 | } |
73af359d | 991 | |
5f5c8ee5 | 992 | return x; |
2311178e | 993 | } |
90adcf20 | 994 | |
b6436d4e | 995 | |
5f5c8ee5 GM |
996 | /* Return the frame-relative coordinate of the right edge of display |
997 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 998 | whole window, to the left of the right fringe of W. */ |
ded34426 | 999 | |
5f5c8ee5 GM |
1000 | INLINE int |
1001 | window_box_right (w, area) | |
1002 | struct window *w; | |
1003 | int area; | |
1004 | { | |
1005 | return window_box_left (w, area) + window_box_width (w, area); | |
2311178e TTN |
1006 | } |
1007 | ||
5f5c8ee5 GM |
1008 | |
1009 | /* Get the bounding box of the display area AREA of window W, without | |
1010 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 1011 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
1012 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
1013 | coordinates of the upper-left corner of the box. Return in | |
1014 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
1015 | ||
1016 | INLINE void | |
1017 | window_box (w, area, box_x, box_y, box_width, box_height) | |
1018 | struct window *w; | |
1019 | int area; | |
1020 | int *box_x, *box_y, *box_width, *box_height; | |
1021 | { | |
1022 | struct frame *f = XFRAME (w->frame); | |
2311178e | 1023 | |
5f5c8ee5 GM |
1024 | *box_width = window_box_width (w, area); |
1025 | *box_height = window_box_height (w); | |
1026 | *box_x = window_box_left (w, area); | |
1027 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
1028 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
1029 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
1030 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 1031 | } |
1adc55de | 1032 | |
1adc55de | 1033 | |
5f5c8ee5 | 1034 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
1035 | mode lines. AREA < 0 means the whole window, not including the |
1036 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
1037 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
1038 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
1039 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
1040 | box. */ | |
ded34426 | 1041 | |
5f5c8ee5 GM |
1042 | INLINE void |
1043 | window_box_edges (w, area, top_left_x, top_left_y, | |
1044 | bottom_right_x, bottom_right_y) | |
1045 | struct window *w; | |
1046 | int area; | |
1047 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 1048 | { |
5f5c8ee5 GM |
1049 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
1050 | bottom_right_y); | |
1051 | *bottom_right_x += *top_left_x; | |
1052 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
1053 | } |
1054 | ||
5f5c8ee5 GM |
1055 | |
1056 | \f | |
1057 | /*********************************************************************** | |
1058 | Utilities | |
1059 | ***********************************************************************/ | |
1060 | ||
8b6ea97f GM |
1061 | /* Return the bottom y-position of the line the iterator IT is in. |
1062 | This can modify IT's settings. */ | |
1063 | ||
1064 | int | |
1065 | line_bottom_y (it) | |
1066 | struct it *it; | |
1067 | { | |
1068 | int line_height = it->max_ascent + it->max_descent; | |
1069 | int line_top_y = it->current_y; | |
2311178e | 1070 | |
8b6ea97f GM |
1071 | if (line_height == 0) |
1072 | { | |
1073 | if (last_height) | |
1074 | line_height = last_height; | |
1075 | else if (IT_CHARPOS (*it) < ZV) | |
1076 | { | |
1077 | move_it_by_lines (it, 1, 1); | |
1078 | line_height = (it->max_ascent || it->max_descent | |
1079 | ? it->max_ascent + it->max_descent | |
1080 | : last_height); | |
1081 | } | |
1082 | else | |
1083 | { | |
1084 | struct glyph_row *row = it->glyph_row; | |
2311178e | 1085 | |
8b6ea97f GM |
1086 | /* Use the default character height. */ |
1087 | it->glyph_row = NULL; | |
1088 | it->what = IT_CHARACTER; | |
1089 | it->c = ' '; | |
1090 | it->len = 1; | |
1091 | PRODUCE_GLYPHS (it); | |
1092 | line_height = it->ascent + it->descent; | |
1093 | it->glyph_row = row; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return line_top_y + line_height; | |
1098 | } | |
1099 | ||
1100 | ||
0db95684 GM |
1101 | /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to |
1102 | 1 if POS is visible and the line containing POS is fully visible. | |
1103 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line | |
1104 | and header-lines heights. */ | |
3a641a69 GM |
1105 | |
1106 | int | |
04612a64 | 1107 | pos_visible_p (w, charpos, fully, exact_mode_line_heights_p) |
3a641a69 | 1108 | struct window *w; |
04612a64 | 1109 | int charpos, *fully, exact_mode_line_heights_p; |
3a641a69 GM |
1110 | { |
1111 | struct it it; | |
1112 | struct text_pos top; | |
fcab1954 GM |
1113 | int visible_p; |
1114 | struct buffer *old_buffer = NULL; | |
1115 | ||
1116 | if (XBUFFER (w->buffer) != current_buffer) | |
1117 | { | |
1118 | old_buffer = current_buffer; | |
1119 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1120 | } | |
3a641a69 GM |
1121 | |
1122 | *fully = visible_p = 0; | |
1123 | SET_TEXT_POS_FROM_MARKER (top, w->start); | |
2311178e | 1124 | |
04612a64 GM |
1125 | /* Compute exact mode line heights, if requested. */ |
1126 | if (exact_mode_line_heights_p) | |
1127 | { | |
1128 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1129 | current_mode_line_height | |
96d2320f | 1130 | = display_mode_line (w, CURRENT_MODE_LINE_FACE_ID (w), |
04612a64 | 1131 | current_buffer->mode_line_format); |
2311178e | 1132 | |
04612a64 GM |
1133 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
1134 | current_header_line_height | |
1135 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1136 | current_buffer->header_line_format); | |
1137 | } | |
3a641a69 | 1138 | |
04612a64 | 1139 | start_display (&it, w, top); |
3a641a69 GM |
1140 | move_it_to (&it, charpos, 0, it.last_visible_y, -1, |
1141 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
a13be207 GM |
1142 | |
1143 | /* Note that we may overshoot because of invisible text. */ | |
1144 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1145 | { |
8b6ea97f GM |
1146 | int top_y = it.current_y; |
1147 | int bottom_y = line_bottom_y (&it); | |
fcab1954 | 1148 | int window_top_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
2311178e | 1149 | |
8b6ea97f GM |
1150 | if (top_y < window_top_y) |
1151 | visible_p = bottom_y > window_top_y; | |
1152 | else if (top_y < it.last_visible_y) | |
fcab1954 GM |
1153 | { |
1154 | visible_p = 1; | |
8b6ea97f | 1155 | *fully = bottom_y <= it.last_visible_y; |
fcab1954 | 1156 | } |
3a641a69 GM |
1157 | } |
1158 | else if (it.current_y + it.max_ascent + it.max_descent > it.last_visible_y) | |
1159 | { | |
1160 | move_it_by_lines (&it, 1, 0); | |
1161 | if (charpos < IT_CHARPOS (it)) | |
1162 | { | |
1163 | visible_p = 1; | |
1164 | *fully = 0; | |
1165 | } | |
1166 | } | |
fcab1954 GM |
1167 | |
1168 | if (old_buffer) | |
1169 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1170 | |
1171 | current_header_line_height = current_mode_line_height = -1; | |
3a641a69 GM |
1172 | return visible_p; |
1173 | } | |
1174 | ||
1175 | ||
4fdb80f2 GM |
1176 | /* Return the next character from STR which is MAXLEN bytes long. |
1177 | Return in *LEN the length of the character. This is like | |
1178 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1179 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1180 | character. */ |
1181 | ||
1182 | static INLINE int | |
7a5b8a93 | 1183 | string_char_and_length (str, maxlen, len) |
50f80c2f | 1184 | const unsigned char *str; |
7a5b8a93 | 1185 | int maxlen, *len; |
4fdb80f2 GM |
1186 | { |
1187 | int c; | |
1188 | ||
1189 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1190 | if (!CHAR_VALID_P (c, 1)) | |
1191 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1192 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1193 | characters. */ |
1194 | c = '?'; | |
1195 | ||
1196 | return c; | |
1197 | } | |
1198 | ||
1199 | ||
1200 | ||
5f5c8ee5 GM |
1201 | /* Given a position POS containing a valid character and byte position |
1202 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1203 | ||
1204 | static struct text_pos | |
1205 | string_pos_nchars_ahead (pos, string, nchars) | |
1206 | struct text_pos pos; | |
1207 | Lisp_Object string; | |
1208 | int nchars; | |
0b1005ef | 1209 | { |
5f5c8ee5 GM |
1210 | xassert (STRINGP (string) && nchars >= 0); |
1211 | ||
1212 | if (STRING_MULTIBYTE (string)) | |
1213 | { | |
2051c264 | 1214 | int rest = SBYTES (string) - BYTEPOS (pos); |
50f80c2f | 1215 | const unsigned char *p = SDATA (string) + BYTEPOS (pos); |
5f5c8ee5 GM |
1216 | int len; |
1217 | ||
1218 | while (nchars--) | |
1219 | { | |
4fdb80f2 | 1220 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1221 | p += len, rest -= len; |
1222 | xassert (rest >= 0); | |
1223 | CHARPOS (pos) += 1; | |
1224 | BYTEPOS (pos) += len; | |
1225 | } | |
1226 | } | |
1227 | else | |
1228 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1229 | ||
1230 | return pos; | |
0a9dc68b RS |
1231 | } |
1232 | ||
0a9dc68b | 1233 | |
5f5c8ee5 GM |
1234 | /* Value is the text position, i.e. character and byte position, |
1235 | for character position CHARPOS in STRING. */ | |
1236 | ||
1237 | static INLINE struct text_pos | |
1238 | string_pos (charpos, string) | |
1239 | int charpos; | |
0a9dc68b | 1240 | Lisp_Object string; |
0a9dc68b | 1241 | { |
5f5c8ee5 GM |
1242 | struct text_pos pos; |
1243 | xassert (STRINGP (string)); | |
1244 | xassert (charpos >= 0); | |
1245 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1246 | return pos; | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* Value is a text position, i.e. character and byte position, for | |
1251 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1252 | means recognize multibyte characters. */ | |
1253 | ||
1254 | static struct text_pos | |
1255 | c_string_pos (charpos, s, multibyte_p) | |
1256 | int charpos; | |
1257 | unsigned char *s; | |
1258 | int multibyte_p; | |
1259 | { | |
1260 | struct text_pos pos; | |
1261 | ||
1262 | xassert (s != NULL); | |
1263 | xassert (charpos >= 0); | |
1264 | ||
1265 | if (multibyte_p) | |
0a9dc68b | 1266 | { |
5f5c8ee5 GM |
1267 | int rest = strlen (s), len; |
1268 | ||
1269 | SET_TEXT_POS (pos, 0, 0); | |
1270 | while (charpos--) | |
0a9dc68b | 1271 | { |
4fdb80f2 | 1272 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1273 | s += len, rest -= len; |
1274 | xassert (rest >= 0); | |
1275 | CHARPOS (pos) += 1; | |
1276 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1277 | } |
1278 | } | |
5f5c8ee5 GM |
1279 | else |
1280 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1281 | |
5f5c8ee5 GM |
1282 | return pos; |
1283 | } | |
0a9dc68b | 1284 | |
0a9dc68b | 1285 | |
5f5c8ee5 GM |
1286 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1287 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1288 | |
5f5c8ee5 GM |
1289 | static int |
1290 | number_of_chars (s, multibyte_p) | |
1291 | unsigned char *s; | |
1292 | int multibyte_p; | |
1293 | { | |
1294 | int nchars; | |
2311178e | 1295 | |
5f5c8ee5 GM |
1296 | if (multibyte_p) |
1297 | { | |
1298 | int rest = strlen (s), len; | |
1299 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1300 | |
5f5c8ee5 GM |
1301 | for (nchars = 0; rest > 0; ++nchars) |
1302 | { | |
4fdb80f2 | 1303 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1304 | rest -= len, p += len; |
0a9dc68b RS |
1305 | } |
1306 | } | |
5f5c8ee5 GM |
1307 | else |
1308 | nchars = strlen (s); | |
1309 | ||
1310 | return nchars; | |
0b1005ef KH |
1311 | } |
1312 | ||
2311178e | 1313 | |
5f5c8ee5 GM |
1314 | /* Compute byte position NEWPOS->bytepos corresponding to |
1315 | NEWPOS->charpos. POS is a known position in string STRING. | |
1316 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1317 | |
5f5c8ee5 GM |
1318 | static void |
1319 | compute_string_pos (newpos, pos, string) | |
1320 | struct text_pos *newpos, pos; | |
1321 | Lisp_Object string; | |
76412d64 | 1322 | { |
5f5c8ee5 GM |
1323 | xassert (STRINGP (string)); |
1324 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
2311178e | 1325 | |
5f5c8ee5 | 1326 | if (STRING_MULTIBYTE (string)) |
6fc556fd KR |
1327 | *newpos = string_pos_nchars_ahead (pos, string, |
1328 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1329 | else |
1330 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1331 | } |
1332 | ||
9c74a0dd | 1333 | |
5f5c8ee5 GM |
1334 | \f |
1335 | /*********************************************************************** | |
1336 | Lisp form evaluation | |
1337 | ***********************************************************************/ | |
1338 | ||
116d6f5c | 1339 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
1340 | |
1341 | static Lisp_Object | |
116d6f5c | 1342 | safe_eval_handler (arg) |
5f5c8ee5 GM |
1343 | Lisp_Object arg; |
1344 | { | |
0dbf9fd2 | 1345 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
1346 | return Qnil; |
1347 | } | |
1348 | ||
1349 | ||
1350 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 1351 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 1352 | |
71e5b1b8 | 1353 | Lisp_Object |
116d6f5c | 1354 | safe_eval (sexpr) |
5f5c8ee5 GM |
1355 | Lisp_Object sexpr; |
1356 | { | |
5f5c8ee5 | 1357 | Lisp_Object val; |
2311178e | 1358 | |
30a3f61c GM |
1359 | if (inhibit_eval_during_redisplay) |
1360 | val = Qnil; | |
1361 | else | |
1362 | { | |
331379bf | 1363 | int count = SPECPDL_INDEX (); |
30a3f61c | 1364 | struct gcpro gcpro1; |
0d8b31c0 | 1365 | |
30a3f61c GM |
1366 | GCPRO1 (sexpr); |
1367 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1368 | /* Use Qt to ensure debugger does not run, |
1369 | so there is no possibility of wanting to redisplay. */ | |
1370 | val = internal_condition_case_1 (Feval, sexpr, Qt, | |
30a3f61c GM |
1371 | safe_eval_handler); |
1372 | UNGCPRO; | |
1373 | val = unbind_to (count, val); | |
1374 | } | |
2311178e | 1375 | |
30a3f61c | 1376 | return val; |
0d8b31c0 GM |
1377 | } |
1378 | ||
1379 | ||
1380 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
1381 | Return the result, or nil if something went wrong. Prevent |
1382 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
1383 | |
1384 | Lisp_Object | |
116d6f5c | 1385 | safe_call (nargs, args) |
0d8b31c0 GM |
1386 | int nargs; |
1387 | Lisp_Object *args; | |
1388 | { | |
0d8b31c0 | 1389 | Lisp_Object val; |
2311178e | 1390 | |
30a3f61c GM |
1391 | if (inhibit_eval_during_redisplay) |
1392 | val = Qnil; | |
1393 | else | |
1394 | { | |
331379bf | 1395 | int count = SPECPDL_INDEX (); |
30a3f61c | 1396 | struct gcpro gcpro1; |
0d8b31c0 | 1397 | |
30a3f61c GM |
1398 | GCPRO1 (args[0]); |
1399 | gcpro1.nvars = nargs; | |
1400 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1401 | /* Use Qt to ensure debugger does not run, |
1402 | so there is no possibility of wanting to redisplay. */ | |
1403 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qt, | |
30a3f61c GM |
1404 | safe_eval_handler); |
1405 | UNGCPRO; | |
1406 | val = unbind_to (count, val); | |
1407 | } | |
1408 | ||
1409 | return val; | |
5f5c8ee5 GM |
1410 | } |
1411 | ||
1412 | ||
116d6f5c GM |
1413 | /* Call function FN with one argument ARG. |
1414 | Return the result, or nil if something went wrong. */ | |
1415 | ||
1416 | Lisp_Object | |
1417 | safe_call1 (fn, arg) | |
1418 | Lisp_Object fn, arg; | |
1419 | { | |
1420 | Lisp_Object args[2]; | |
1421 | args[0] = fn; | |
1422 | args[1] = arg; | |
1423 | return safe_call (2, args); | |
1424 | } | |
1425 | ||
1426 | ||
5f5c8ee5 GM |
1427 | \f |
1428 | /*********************************************************************** | |
1429 | Debugging | |
1430 | ***********************************************************************/ | |
1431 | ||
1432 | #if 0 | |
1433 | ||
1434 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1435 | This is for debugging. It is too slow to do unconditionally. */ | |
1436 | ||
1437 | static void | |
1438 | check_it (it) | |
1439 | struct it *it; | |
1440 | { | |
1441 | if (it->method == next_element_from_string) | |
a2889657 | 1442 | { |
5f5c8ee5 GM |
1443 | xassert (STRINGP (it->string)); |
1444 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1445 | } | |
1446 | else if (it->method == next_element_from_buffer) | |
1447 | { | |
1448 | /* Check that character and byte positions agree. */ | |
1449 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1450 | } | |
73af359d | 1451 | |
5f5c8ee5 GM |
1452 | if (it->dpvec) |
1453 | xassert (it->current.dpvec_index >= 0); | |
1454 | else | |
1455 | xassert (it->current.dpvec_index < 0); | |
1456 | } | |
1f40cad2 | 1457 | |
5f5c8ee5 GM |
1458 | #define CHECK_IT(IT) check_it ((IT)) |
1459 | ||
1460 | #else /* not 0 */ | |
1461 | ||
1462 | #define CHECK_IT(IT) (void) 0 | |
1463 | ||
1464 | #endif /* not 0 */ | |
1465 | ||
1466 | ||
1467 | #if GLYPH_DEBUG | |
1468 | ||
1469 | /* Check that the window end of window W is what we expect it | |
1470 | to be---the last row in the current matrix displaying text. */ | |
1471 | ||
1472 | static void | |
1473 | check_window_end (w) | |
1474 | struct window *w; | |
1475 | { | |
1476 | if (!MINI_WINDOW_P (w) | |
1477 | && !NILP (w->window_end_valid)) | |
1478 | { | |
1479 | struct glyph_row *row; | |
1480 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1481 | XFASTINT (w->window_end_vpos)), | |
1482 | !row->enabled_p | |
1483 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1484 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1489 | ||
1490 | #else /* not GLYPH_DEBUG */ | |
1491 | ||
1492 | #define CHECK_WINDOW_END(W) (void) 0 | |
1493 | ||
1494 | #endif /* not GLYPH_DEBUG */ | |
1495 | ||
1496 | ||
1497 | \f | |
1498 | /*********************************************************************** | |
1499 | Iterator initialization | |
1500 | ***********************************************************************/ | |
1501 | ||
1502 | /* Initialize IT for displaying current_buffer in window W, starting | |
1503 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1504 | position is specified which is useful when the iterator is assigned | |
1505 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 1506 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
1507 | |
1508 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1509 | will produce glyphs in that row. | |
1510 | ||
1511 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
96d2320f KS |
1512 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID, |
1513 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID for displaying | |
1514 | mode lines, or TOOL_BAR_FACE_ID for displaying the tool-bar. | |
2311178e | 1515 | |
96d2320f KS |
1516 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID, |
1517 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID, the iterator | |
1518 | will be initialized to use the corresponding mode line glyph row of | |
1519 | the desired matrix of W. */ | |
5f5c8ee5 GM |
1520 | |
1521 | void | |
1522 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1523 | struct it *it; | |
1524 | struct window *w; | |
1525 | int charpos, bytepos; | |
1526 | struct glyph_row *row; | |
1527 | enum face_id base_face_id; | |
1528 | { | |
1529 | int highlight_region_p; | |
5f5c8ee5 GM |
1530 | |
1531 | /* Some precondition checks. */ | |
1532 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
1533 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
1534 | && charpos <= ZV)); | |
5f5c8ee5 GM |
1535 | |
1536 | /* If face attributes have been changed since the last redisplay, | |
1537 | free realized faces now because they depend on face definitions | |
7d0393cf | 1538 | that might have changed. Don't free faces while there might be |
1987b083 | 1539 | desired matrices pending which reference these faces. */ |
26683087 | 1540 | if (face_change_count && !inhibit_free_realized_faces) |
5f5c8ee5 GM |
1541 | { |
1542 | face_change_count = 0; | |
1543 | free_all_realized_faces (Qnil); | |
1544 | } | |
1545 | ||
1546 | /* Use one of the mode line rows of W's desired matrix if | |
1547 | appropriate. */ | |
1548 | if (row == NULL) | |
1549 | { | |
96d2320f KS |
1550 | if (base_face_id == MODE_LINE_FACE_ID |
1551 | || base_face_id == MODE_LINE_INACTIVE_FACE_ID) | |
5f5c8ee5 | 1552 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); |
045dee35 GM |
1553 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1554 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 | 1555 | } |
2311178e | 1556 | |
5f5c8ee5 GM |
1557 | /* Clear IT. */ |
1558 | bzero (it, sizeof *it); | |
1559 | it->current.overlay_string_index = -1; | |
1560 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1561 | it->base_face_id = base_face_id; |
1562 | ||
1563 | /* The window in which we iterate over current_buffer: */ | |
1564 | XSETWINDOW (it->window, w); | |
1565 | it->w = w; | |
1566 | it->f = XFRAME (w->frame); | |
1567 | ||
d475bcb8 GM |
1568 | /* Extra space between lines (on window systems only). */ |
1569 | if (base_face_id == DEFAULT_FACE_ID | |
1570 | && FRAME_WINDOW_P (it->f)) | |
1571 | { | |
1572 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1573 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1574 | else if (it->f->extra_line_spacing > 0) | |
1575 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1576 | } | |
1577 | ||
5f5c8ee5 | 1578 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
1579 | attribute changes of named faces, recompute them. When running |
1580 | in batch mode, the face cache of Vterminal_frame is null. If | |
1581 | we happen to get called, make a dummy face cache. */ | |
9010e6b1 AI |
1582 | if ( |
1583 | #ifndef WINDOWSNT | |
1584 | noninteractive && | |
1585 | #endif | |
1586 | FRAME_FACE_CACHE (it->f) == NULL) | |
62be9979 | 1587 | init_frame_faces (it->f); |
5f5c8ee5 GM |
1588 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
1589 | recompute_basic_faces (it->f); | |
1590 | ||
5f5c8ee5 GM |
1591 | /* Current value of the `space-width', and 'height' properties. */ |
1592 | it->space_width = Qnil; | |
1593 | it->font_height = Qnil; | |
2311178e | 1594 | |
5f5c8ee5 GM |
1595 | /* Are control characters displayed as `^C'? */ |
1596 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1597 | ||
1598 | /* -1 means everything between a CR and the following line end | |
1599 | is invisible. >0 means lines indented more than this value are | |
1600 | invisible. */ | |
1601 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1602 | ? XFASTINT (current_buffer->selective_display) | |
2311178e | 1603 | : (!NILP (current_buffer->selective_display) |
5f5c8ee5 GM |
1604 | ? -1 : 0)); |
1605 | it->selective_display_ellipsis_p | |
1606 | = !NILP (current_buffer->selective_display_ellipses); | |
1607 | ||
1608 | /* Display table to use. */ | |
1609 | it->dp = window_display_table (w); | |
1610 | ||
1611 | /* Are multibyte characters enabled in current_buffer? */ | |
1612 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1613 | ||
1614 | /* Non-zero if we should highlight the region. */ | |
1615 | highlight_region_p | |
3ebf0ea9 | 1616 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
1617 | && !NILP (current_buffer->mark_active) |
1618 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1619 | ||
1620 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1621 | start and end of a visible region in window IT->w. Set both to | |
1622 | -1 to indicate no region. */ | |
1623 | if (highlight_region_p | |
1624 | /* Maybe highlight only in selected window. */ | |
2311178e | 1625 | && (/* Either show region everywhere. */ |
5f5c8ee5 GM |
1626 | highlight_nonselected_windows |
1627 | /* Or show region in the selected window. */ | |
1628 | || w == XWINDOW (selected_window) | |
1629 | /* Or show the region if we are in the mini-buffer and W is | |
1630 | the window the mini-buffer refers to. */ | |
1631 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
5705966b KS |
1632 | && WINDOWP (minibuf_selected_window) |
1633 | && w == XWINDOW (minibuf_selected_window)))) | |
5f5c8ee5 GM |
1634 | { |
1635 | int charpos = marker_position (current_buffer->mark); | |
1636 | it->region_beg_charpos = min (PT, charpos); | |
1637 | it->region_end_charpos = max (PT, charpos); | |
1638 | } | |
1639 | else | |
1640 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1641 | ||
1642 | /* Get the position at which the redisplay_end_trigger hook should | |
1643 | be run, if it is to be run at all. */ | |
1644 | if (MARKERP (w->redisplay_end_trigger) | |
1645 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1646 | it->redisplay_end_trigger_charpos | |
1647 | = marker_position (w->redisplay_end_trigger); | |
1648 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1649 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1650 | ||
1651 | /* Correct bogus values of tab_width. */ | |
1652 | it->tab_width = XINT (current_buffer->tab_width); | |
1653 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1654 | it->tab_width = 8; | |
1655 | ||
1656 | /* Are lines in the display truncated? */ | |
1657 | it->truncate_lines_p | |
1658 | = (base_face_id != DEFAULT_FACE_ID | |
1659 | || XINT (it->w->hscroll) | |
1660 | || (truncate_partial_width_windows | |
1661 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1662 | || !NILP (current_buffer->truncate_lines)); | |
1663 | ||
1664 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 1665 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
1666 | frames. */ |
1667 | if (!FRAME_WINDOW_P (it->f)) | |
1668 | { | |
1669 | if (it->truncate_lines_p) | |
1670 | { | |
1671 | /* We will need the truncation glyph. */ | |
1672 | xassert (it->glyph_row == NULL); | |
1673 | produce_special_glyphs (it, IT_TRUNCATION); | |
1674 | it->truncation_pixel_width = it->pixel_width; | |
1675 | } | |
1676 | else | |
1677 | { | |
1678 | /* We will need the continuation glyph. */ | |
1679 | xassert (it->glyph_row == NULL); | |
1680 | produce_special_glyphs (it, IT_CONTINUATION); | |
1681 | it->continuation_pixel_width = it->pixel_width; | |
1682 | } | |
1683 | ||
153c2160 | 1684 | /* Reset these values to zero because the produce_special_glyphs |
5f5c8ee5 GM |
1685 | above has changed them. */ |
1686 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1687 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1688 | } |
1689 | ||
1690 | /* Set this after getting the dimensions of truncation and | |
1691 | continuation glyphs, so that we don't produce glyphs when calling | |
1692 | produce_special_glyphs, above. */ | |
1693 | it->glyph_row = row; | |
1694 | it->area = TEXT_AREA; | |
1695 | ||
1696 | /* Get the dimensions of the display area. The display area | |
1697 | consists of the visible window area plus a horizontally scrolled | |
1698 | part to the left of the window. All x-values are relative to the | |
1699 | start of this total display area. */ | |
1700 | if (base_face_id != DEFAULT_FACE_ID) | |
1701 | { | |
1702 | /* Mode lines, menu bar in terminal frames. */ | |
1703 | it->first_visible_x = 0; | |
1704 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1705 | } | |
1706 | else | |
1707 | { | |
1708 | it->first_visible_x | |
1709 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1710 | it->last_visible_x = (it->first_visible_x | |
1711 | + window_box_width (w, TEXT_AREA)); | |
1712 | ||
1713 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1714 | the right margin. Otherwise, leave room for the continuation | |
1715 | glyph(s). Truncation and continuation glyphs are not inserted | |
1716 | for window-based redisplay. */ | |
1717 | if (!FRAME_WINDOW_P (it->f)) | |
1718 | { | |
1719 | if (it->truncate_lines_p) | |
1720 | it->last_visible_x -= it->truncation_pixel_width; | |
1721 | else | |
1722 | it->last_visible_x -= it->continuation_pixel_width; | |
1723 | } | |
1724 | ||
045dee35 GM |
1725 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1726 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1727 | } |
1728 | ||
1729 | /* Leave room for a border glyph. */ | |
1730 | if (!FRAME_WINDOW_P (it->f) | |
1731 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1732 | it->last_visible_x -= 1; | |
1733 | ||
1734 | it->last_visible_y = window_text_bottom_y (w); | |
1735 | ||
1736 | /* For mode lines and alike, arrange for the first glyph having a | |
1737 | left box line if the face specifies a box. */ | |
1738 | if (base_face_id != DEFAULT_FACE_ID) | |
1739 | { | |
1740 | struct face *face; | |
2311178e | 1741 | |
5f5c8ee5 GM |
1742 | it->face_id = base_face_id; |
1743 | ||
1744 | /* If we have a boxed mode line, make the first character appear | |
1745 | with a left box line. */ | |
1746 | face = FACE_FROM_ID (it->f, base_face_id); | |
1747 | if (face->box != FACE_NO_BOX) | |
1748 | it->start_of_box_run_p = 1; | |
1749 | } | |
1750 | ||
1751 | /* If a buffer position was specified, set the iterator there, | |
1752 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 1753 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
1754 | { |
1755 | it->end_charpos = ZV; | |
1756 | it->face_id = -1; | |
1757 | IT_CHARPOS (*it) = charpos; | |
2311178e | 1758 | |
5f5c8ee5 | 1759 | /* Compute byte position if not specified. */ |
3ebf0ea9 | 1760 | if (bytepos < charpos) |
5f5c8ee5 GM |
1761 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
1762 | else | |
1763 | IT_BYTEPOS (*it) = bytepos; | |
1764 | ||
1765 | /* Compute faces etc. */ | |
1766 | reseat (it, it->current.pos, 1); | |
1767 | } | |
2311178e | 1768 | |
5f5c8ee5 GM |
1769 | CHECK_IT (it); |
1770 | } | |
1771 | ||
1772 | ||
1773 | /* Initialize IT for the display of window W with window start POS. */ | |
1774 | ||
1775 | void | |
1776 | start_display (it, w, pos) | |
1777 | struct it *it; | |
1778 | struct window *w; | |
1779 | struct text_pos pos; | |
1780 | { | |
5f5c8ee5 | 1781 | struct glyph_row *row; |
045dee35 | 1782 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1783 | |
1784 | row = w->desired_matrix->rows + first_vpos; | |
1785 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
17fdcfc8 GM |
1786 | |
1787 | if (!it->truncate_lines_p) | |
5f5c8ee5 | 1788 | { |
17fdcfc8 GM |
1789 | int start_at_line_beg_p; |
1790 | int first_y = it->current_y; | |
2311178e | 1791 | |
17fdcfc8 GM |
1792 | /* If window start is not at a line start, skip forward to POS to |
1793 | get the correct continuation lines width. */ | |
1794 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1795 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1796 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 1797 | { |
0e47bbf7 RS |
1798 | int new_x; |
1799 | ||
17fdcfc8 GM |
1800 | reseat_at_previous_visible_line_start (it); |
1801 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1802 | ||
0e47bbf7 RS |
1803 | new_x = it->current_x + it->pixel_width; |
1804 | ||
17fdcfc8 GM |
1805 | /* If lines are continued, this line may end in the middle |
1806 | of a multi-glyph character (e.g. a control character | |
1807 | displayed as \003, or in the middle of an overlay | |
1808 | string). In this case move_it_to above will not have | |
1809 | taken us to the start of the continuation line but to the | |
1810 | end of the continued line. */ | |
0e47bbf7 RS |
1811 | if (it->current_x > 0 |
1812 | && !it->truncate_lines_p /* Lines are continued. */ | |
1813 | && (/* And glyph doesn't fit on the line. */ | |
1814 | new_x > it->last_visible_x | |
1815 | /* Or it fits exactly and we're on a window | |
1816 | system frame. */ | |
1817 | || (new_x == it->last_visible_x | |
1818 | && FRAME_WINDOW_P (it->f)))) | |
5f5c8ee5 | 1819 | { |
b28cb6ed GM |
1820 | if (it->current.dpvec_index >= 0 |
1821 | || it->current.overlay_string_index >= 0) | |
1822 | { | |
cafafe0b | 1823 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
1824 | move_it_in_display_line_to (it, -1, -1, 0); |
1825 | } | |
2311178e | 1826 | |
b28cb6ed | 1827 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 1828 | } |
b28cb6ed GM |
1829 | |
1830 | /* We're starting a new display line, not affected by the | |
1831 | height of the continued line, so clear the appropriate | |
1832 | fields in the iterator structure. */ | |
1833 | it->max_ascent = it->max_descent = 0; | |
1834 | it->max_phys_ascent = it->max_phys_descent = 0; | |
2311178e | 1835 | |
17fdcfc8 GM |
1836 | it->current_y = first_y; |
1837 | it->vpos = 0; | |
1838 | it->current_x = it->hpos = 0; | |
1839 | } | |
5f5c8ee5 GM |
1840 | } |
1841 | ||
1842 | #if 0 /* Don't assert the following because start_display is sometimes | |
1843 | called intentionally with a window start that is not at a | |
1844 | line start. Please leave this code in as a comment. */ | |
2311178e | 1845 | |
5f5c8ee5 GM |
1846 | /* Window start should be on a line start, now. */ |
1847 | xassert (it->continuation_lines_width | |
1848 | || IT_CHARPOS (it) == BEGV | |
1849 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1850 | #endif /* 0 */ | |
1851 | } | |
1852 | ||
1853 | ||
4bde0ebb GM |
1854 | /* Return 1 if POS is a position in ellipses displayed for invisible |
1855 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 1856 | |
4bde0ebb GM |
1857 | static int |
1858 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 1859 | struct display_pos *pos; |
4bde0ebb | 1860 | struct window *w; |
5f5c8ee5 | 1861 | { |
ac90c44f | 1862 | Lisp_Object prop, window; |
4bde0ebb GM |
1863 | int ellipses_p = 0; |
1864 | int charpos = CHARPOS (pos->pos); | |
2311178e | 1865 | |
ac90c44f GM |
1866 | /* If POS specifies a position in a display vector, this might |
1867 | be for an ellipsis displayed for invisible text. We won't | |
1868 | get the iterator set up for delivering that ellipsis unless | |
1869 | we make sure that it gets aware of the invisible text. */ | |
1870 | if (pos->dpvec_index >= 0 | |
1871 | && pos->overlay_string_index < 0 | |
1872 | && CHARPOS (pos->string_pos) < 0 | |
1873 | && charpos > BEGV | |
1874 | && (XSETWINDOW (window, w), | |
1875 | prop = Fget_char_property (make_number (charpos), | |
1876 | Qinvisible, window), | |
20fbd925 | 1877 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
1878 | { |
1879 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
1880 | window); | |
8580a4e3 | 1881 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
1882 | } |
1883 | ||
1884 | return ellipses_p; | |
1885 | } | |
1886 | ||
1887 | ||
1888 | /* Initialize IT for stepping through current_buffer in window W, | |
1889 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
1890 | vector/ control character translation position information. Value |
1891 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 1892 | |
47d57b22 | 1893 | static int |
4bde0ebb GM |
1894 | init_from_display_pos (it, w, pos) |
1895 | struct it *it; | |
1896 | struct window *w; | |
1897 | struct display_pos *pos; | |
1898 | { | |
1899 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 1900 | int i, overlay_strings_with_newlines = 0; |
2311178e | 1901 | |
4bde0ebb GM |
1902 | /* If POS specifies a position in a display vector, this might |
1903 | be for an ellipsis displayed for invisible text. We won't | |
1904 | get the iterator set up for delivering that ellipsis unless | |
1905 | we make sure that it gets aware of the invisible text. */ | |
1906 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
1907 | { | |
1908 | --charpos; | |
1909 | bytepos = 0; | |
ac90c44f | 1910 | } |
2311178e | 1911 | |
5f5c8ee5 GM |
1912 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
1913 | text, so we might end up at a position different from POS. This | |
1914 | is only a problem when POS is a row start after a newline and an | |
1915 | overlay starts there with an after-string, and the overlay has an | |
1916 | invisible property. Since we don't skip invisible text in | |
1917 | display_line and elsewhere immediately after consuming the | |
1918 | newline before the row start, such a POS will not be in a string, | |
1919 | but the call to init_iterator below will move us to the | |
1920 | after-string. */ | |
ac90c44f | 1921 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 1922 | |
47d57b22 | 1923 | for (i = 0; i < it->n_overlay_strings; ++i) |
1e1e5daf | 1924 | { |
50f80c2f KR |
1925 | const char *s = SDATA (it->overlay_strings[i]); |
1926 | const char *e = s + SBYTES (it->overlay_strings[i]); | |
2311178e | 1927 | |
1e1e5daf GM |
1928 | while (s < e && *s != '\n') |
1929 | ++s; | |
1930 | ||
1931 | if (s < e) | |
1932 | { | |
1933 | overlay_strings_with_newlines = 1; | |
1934 | break; | |
1935 | } | |
1936 | } | |
47d57b22 | 1937 | |
75c5350a GM |
1938 | /* If position is within an overlay string, set up IT to the right |
1939 | overlay string. */ | |
5f5c8ee5 GM |
1940 | if (pos->overlay_string_index >= 0) |
1941 | { | |
1942 | int relative_index; | |
75c5350a GM |
1943 | |
1944 | /* If the first overlay string happens to have a `display' | |
1945 | property for an image, the iterator will be set up for that | |
1946 | image, and we have to undo that setup first before we can | |
1947 | correct the overlay string index. */ | |
1948 | if (it->method == next_element_from_image) | |
1949 | pop_it (it); | |
2311178e | 1950 | |
5f5c8ee5 GM |
1951 | /* We already have the first chunk of overlay strings in |
1952 | IT->overlay_strings. Load more until the one for | |
1953 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1954 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1955 | { | |
1956 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1957 | it->current.overlay_string_index = 0; | |
1958 | while (n--) | |
1959 | { | |
5a08cbaf | 1960 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
1961 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
1962 | } | |
1963 | } | |
2311178e | 1964 | |
5f5c8ee5 GM |
1965 | it->current.overlay_string_index = pos->overlay_string_index; |
1966 | relative_index = (it->current.overlay_string_index | |
1967 | % OVERLAY_STRING_CHUNK_SIZE); | |
1968 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 1969 | xassert (STRINGP (it->string)); |
5f5c8ee5 GM |
1970 | it->current.string_pos = pos->string_pos; |
1971 | it->method = next_element_from_string; | |
1972 | } | |
2311178e | 1973 | |
1e1e5daf GM |
1974 | #if 0 /* This is bogus because POS not having an overlay string |
1975 | position does not mean it's after the string. Example: A | |
1976 | line starting with a before-string and initialization of IT | |
1977 | to the previous row's end position. */ | |
2be8f184 GM |
1978 | else if (it->current.overlay_string_index >= 0) |
1979 | { | |
1980 | /* If POS says we're already after an overlay string ending at | |
1981 | POS, make sure to pop the iterator because it will be in | |
1982 | front of that overlay string. When POS is ZV, we've thereby | |
1983 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
1984 | while (it->sp) |
1985 | pop_it (it); | |
2be8f184 GM |
1986 | it->current.overlay_string_index = -1; |
1987 | it->method = next_element_from_buffer; | |
1988 | if (CHARPOS (pos->pos) == ZV) | |
1989 | it->overlay_strings_at_end_processed_p = 1; | |
1990 | } | |
1e1e5daf | 1991 | #endif /* 0 */ |
2311178e | 1992 | |
2be8f184 | 1993 | if (CHARPOS (pos->string_pos) >= 0) |
5f5c8ee5 GM |
1994 | { |
1995 | /* Recorded position is not in an overlay string, but in another | |
1996 | string. This can only be a string from a `display' property. | |
1997 | IT should already be filled with that string. */ | |
1998 | it->current.string_pos = pos->string_pos; | |
1999 | xassert (STRINGP (it->string)); | |
2000 | } | |
2001 | ||
ac90c44f GM |
2002 | /* Restore position in display vector translations, control |
2003 | character translations or ellipses. */ | |
5f5c8ee5 GM |
2004 | if (pos->dpvec_index >= 0) |
2005 | { | |
ac90c44f GM |
2006 | if (it->dpvec == NULL) |
2007 | get_next_display_element (it); | |
5f5c8ee5 GM |
2008 | xassert (it->dpvec && it->current.dpvec_index == 0); |
2009 | it->current.dpvec_index = pos->dpvec_index; | |
2010 | } | |
2311178e | 2011 | |
5f5c8ee5 | 2012 | CHECK_IT (it); |
47d57b22 | 2013 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
2014 | } |
2015 | ||
2016 | ||
2017 | /* Initialize IT for stepping through current_buffer in window W | |
2018 | starting at ROW->start. */ | |
2019 | ||
2020 | static void | |
2021 | init_to_row_start (it, w, row) | |
2022 | struct it *it; | |
2023 | struct window *w; | |
2024 | struct glyph_row *row; | |
2025 | { | |
2026 | init_from_display_pos (it, w, &row->start); | |
2027 | it->continuation_lines_width = row->continuation_lines_width; | |
2028 | CHECK_IT (it); | |
2029 | } | |
2030 | ||
2311178e | 2031 | |
5f5c8ee5 | 2032 | /* Initialize IT for stepping through current_buffer in window W |
47d57b22 GM |
2033 | starting in the line following ROW, i.e. starting at ROW->end. |
2034 | Value is zero if there are overlay strings with newlines at ROW's | |
2035 | end position. */ | |
5f5c8ee5 | 2036 | |
47d57b22 | 2037 | static int |
5f5c8ee5 GM |
2038 | init_to_row_end (it, w, row) |
2039 | struct it *it; | |
2040 | struct window *w; | |
2041 | struct glyph_row *row; | |
2042 | { | |
47d57b22 | 2043 | int success = 0; |
2311178e | 2044 | |
47d57b22 GM |
2045 | if (init_from_display_pos (it, w, &row->end)) |
2046 | { | |
2047 | if (row->continued_p) | |
2048 | it->continuation_lines_width | |
2049 | = row->continuation_lines_width + row->pixel_width; | |
2050 | CHECK_IT (it); | |
2051 | success = 1; | |
2052 | } | |
2311178e | 2053 | |
47d57b22 | 2054 | return success; |
5f5c8ee5 GM |
2055 | } |
2056 | ||
2057 | ||
2058 | ||
2059 | \f | |
2060 | /*********************************************************************** | |
2061 | Text properties | |
2062 | ***********************************************************************/ | |
2063 | ||
2064 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
2065 | overlay changes. Set IT->stop_charpos to the next position where | |
2066 | to stop. */ | |
2067 | ||
2068 | static void | |
2069 | handle_stop (it) | |
2070 | struct it *it; | |
2071 | { | |
2072 | enum prop_handled handled; | |
2073 | int handle_overlay_change_p = 1; | |
2074 | struct props *p; | |
2075 | ||
2076 | it->dpvec = NULL; | |
2077 | it->current.dpvec_index = -1; | |
2078 | ||
2079 | do | |
2080 | { | |
2081 | handled = HANDLED_NORMALLY; | |
2311178e | 2082 | |
5f5c8ee5 GM |
2083 | /* Call text property handlers. */ |
2084 | for (p = it_props; p->handler; ++p) | |
2085 | { | |
2086 | handled = p->handler (it); | |
2970b9be | 2087 | |
5f5c8ee5 GM |
2088 | if (handled == HANDLED_RECOMPUTE_PROPS) |
2089 | break; | |
2090 | else if (handled == HANDLED_RETURN) | |
2091 | return; | |
2092 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
2093 | handle_overlay_change_p = 0; | |
2094 | } | |
2095 | ||
2096 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
2097 | { | |
2098 | /* Don't check for overlay strings below when set to deliver | |
2099 | characters from a display vector. */ | |
2100 | if (it->method == next_element_from_display_vector) | |
2101 | handle_overlay_change_p = 0; | |
2102 | ||
2103 | /* Handle overlay changes. */ | |
2104 | if (handle_overlay_change_p) | |
2105 | handled = handle_overlay_change (it); | |
2311178e | 2106 | |
5f5c8ee5 GM |
2107 | /* Determine where to stop next. */ |
2108 | if (handled == HANDLED_NORMALLY) | |
2109 | compute_stop_pos (it); | |
2110 | } | |
2111 | } | |
2112 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
2113 | } | |
2114 | ||
2115 | ||
2116 | /* Compute IT->stop_charpos from text property and overlay change | |
2117 | information for IT's current position. */ | |
2118 | ||
2119 | static void | |
2120 | compute_stop_pos (it) | |
2121 | struct it *it; | |
2122 | { | |
2123 | register INTERVAL iv, next_iv; | |
2124 | Lisp_Object object, limit, position; | |
2125 | ||
2126 | /* If nowhere else, stop at the end. */ | |
2127 | it->stop_charpos = it->end_charpos; | |
2311178e | 2128 | |
5f5c8ee5 GM |
2129 | if (STRINGP (it->string)) |
2130 | { | |
2131 | /* Strings are usually short, so don't limit the search for | |
2132 | properties. */ | |
2133 | object = it->string; | |
2134 | limit = Qnil; | |
ac90c44f | 2135 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2136 | } |
2137 | else | |
2138 | { | |
2139 | int charpos; | |
2140 | ||
2141 | /* If next overlay change is in front of the current stop pos | |
2142 | (which is IT->end_charpos), stop there. Note: value of | |
2143 | next_overlay_change is point-max if no overlay change | |
2144 | follows. */ | |
2145 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
2146 | if (charpos < it->stop_charpos) | |
2147 | it->stop_charpos = charpos; | |
2148 | ||
2149 | /* If showing the region, we have to stop at the region | |
2150 | start or end because the face might change there. */ | |
2151 | if (it->region_beg_charpos > 0) | |
2152 | { | |
2153 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
2154 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
2155 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
2156 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
2157 | } | |
2311178e | 2158 | |
5f5c8ee5 GM |
2159 | /* Set up variables for computing the stop position from text |
2160 | property changes. */ | |
2161 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
2162 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
2163 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
2164 | |
2165 | } | |
2166 | ||
2167 | /* Get the interval containing IT's position. Value is a null | |
2168 | interval if there isn't such an interval. */ | |
2169 | iv = validate_interval_range (object, &position, &position, 0); | |
2170 | if (!NULL_INTERVAL_P (iv)) | |
2171 | { | |
2172 | Lisp_Object values_here[LAST_PROP_IDX]; | |
2173 | struct props *p; | |
2174 | ||
2175 | /* Get properties here. */ | |
2176 | for (p = it_props; p->handler; ++p) | |
2177 | values_here[p->idx] = textget (iv->plist, *p->name); | |
2178 | ||
2179 | /* Look for an interval following iv that has different | |
2180 | properties. */ | |
2181 | for (next_iv = next_interval (iv); | |
2182 | (!NULL_INTERVAL_P (next_iv) | |
2183 | && (NILP (limit) | |
2184 | || XFASTINT (limit) > next_iv->position)); | |
2185 | next_iv = next_interval (next_iv)) | |
2186 | { | |
2187 | for (p = it_props; p->handler; ++p) | |
2188 | { | |
2189 | Lisp_Object new_value; | |
2190 | ||
2191 | new_value = textget (next_iv->plist, *p->name); | |
2192 | if (!EQ (values_here[p->idx], new_value)) | |
2193 | break; | |
2194 | } | |
2311178e | 2195 | |
5f5c8ee5 GM |
2196 | if (p->handler) |
2197 | break; | |
2198 | } | |
2199 | ||
2200 | if (!NULL_INTERVAL_P (next_iv)) | |
2201 | { | |
2202 | if (INTEGERP (limit) | |
2203 | && next_iv->position >= XFASTINT (limit)) | |
2204 | /* No text property change up to limit. */ | |
2205 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
2206 | else | |
2207 | /* Text properties change in next_iv. */ | |
2208 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
2209 | } | |
2210 | } | |
2211 | ||
2212 | xassert (STRINGP (it->string) | |
2213 | || (it->stop_charpos >= BEGV | |
2214 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
2215 | } | |
2216 | ||
2217 | ||
2218 | /* Return the position of the next overlay change after POS in | |
2219 | current_buffer. Value is point-max if no overlay change | |
2220 | follows. This is like `next-overlay-change' but doesn't use | |
2221 | xmalloc. */ | |
2222 | ||
2223 | static int | |
2224 | next_overlay_change (pos) | |
2225 | int pos; | |
2226 | { | |
2227 | int noverlays; | |
2228 | int endpos; | |
2229 | Lisp_Object *overlays; | |
2230 | int len; | |
2231 | int i; | |
2232 | ||
2233 | /* Get all overlays at the given position. */ | |
2234 | len = 10; | |
2235 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2236 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2237 | if (noverlays > len) |
2238 | { | |
2239 | len = noverlays; | |
2240 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2241 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2242 | } |
2243 | ||
2244 | /* If any of these overlays ends before endpos, | |
2245 | use its ending point instead. */ | |
2246 | for (i = 0; i < noverlays; ++i) | |
2247 | { | |
2248 | Lisp_Object oend; | |
2249 | int oendpos; | |
2250 | ||
2251 | oend = OVERLAY_END (overlays[i]); | |
2252 | oendpos = OVERLAY_POSITION (oend); | |
2253 | endpos = min (endpos, oendpos); | |
2254 | } | |
2255 | ||
2256 | return endpos; | |
2257 | } | |
2258 | ||
2259 | ||
2260 | \f | |
2261 | /*********************************************************************** | |
2262 | Fontification | |
2263 | ***********************************************************************/ | |
2264 | ||
2265 | /* Handle changes in the `fontified' property of the current buffer by | |
2266 | calling hook functions from Qfontification_functions to fontify | |
2267 | regions of text. */ | |
2268 | ||
2269 | static enum prop_handled | |
2270 | handle_fontified_prop (it) | |
2271 | struct it *it; | |
2272 | { | |
2273 | Lisp_Object prop, pos; | |
2274 | enum prop_handled handled = HANDLED_NORMALLY; | |
2275 | ||
2276 | /* Get the value of the `fontified' property at IT's current buffer | |
2277 | position. (The `fontified' property doesn't have a special | |
2278 | meaning in strings.) If the value is nil, call functions from | |
2279 | Qfontification_functions. */ | |
2280 | if (!STRINGP (it->string) | |
2281 | && it->s == NULL | |
2282 | && !NILP (Vfontification_functions) | |
085536c2 | 2283 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
2284 | && (pos = make_number (IT_CHARPOS (*it)), |
2285 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
2286 | NILP (prop))) | |
2287 | { | |
331379bf | 2288 | int count = SPECPDL_INDEX (); |
085536c2 GM |
2289 | Lisp_Object val; |
2290 | ||
2291 | val = Vfontification_functions; | |
2292 | specbind (Qfontification_functions, Qnil); | |
2311178e | 2293 | |
085536c2 | 2294 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
116d6f5c | 2295 | safe_call1 (val, pos); |
085536c2 GM |
2296 | else |
2297 | { | |
2298 | Lisp_Object globals, fn; | |
2299 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 2300 | |
085536c2 GM |
2301 | globals = Qnil; |
2302 | GCPRO2 (val, globals); | |
2311178e | 2303 | |
085536c2 GM |
2304 | for (; CONSP (val); val = XCDR (val)) |
2305 | { | |
2306 | fn = XCAR (val); | |
2311178e | 2307 | |
085536c2 GM |
2308 | if (EQ (fn, Qt)) |
2309 | { | |
2310 | /* A value of t indicates this hook has a local | |
2311 | binding; it means to run the global binding too. | |
2312 | In a global value, t should not occur. If it | |
2313 | does, we must ignore it to avoid an endless | |
2314 | loop. */ | |
2315 | for (globals = Fdefault_value (Qfontification_functions); | |
2316 | CONSP (globals); | |
2317 | globals = XCDR (globals)) | |
2318 | { | |
2319 | fn = XCAR (globals); | |
2320 | if (!EQ (fn, Qt)) | |
116d6f5c | 2321 | safe_call1 (fn, pos); |
085536c2 GM |
2322 | } |
2323 | } | |
2324 | else | |
116d6f5c | 2325 | safe_call1 (fn, pos); |
085536c2 GM |
2326 | } |
2327 | ||
2328 | UNGCPRO; | |
2329 | } | |
2330 | ||
2331 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2332 | |
2333 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
2334 | something. This avoids an endless loop if they failed to | |
2335 | fontify the text for which reason ever. */ | |
2336 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
2337 | handled = HANDLED_RECOMPUTE_PROPS; | |
2338 | } | |
2339 | ||
2340 | return handled; | |
2341 | } | |
2342 | ||
2343 | ||
2344 | \f | |
2345 | /*********************************************************************** | |
2346 | Faces | |
2347 | ***********************************************************************/ | |
2348 | ||
2349 | /* Set up iterator IT from face properties at its current position. | |
2350 | Called from handle_stop. */ | |
2351 | ||
2352 | static enum prop_handled | |
2353 | handle_face_prop (it) | |
2354 | struct it *it; | |
2355 | { | |
2356 | int new_face_id, next_stop; | |
2311178e | 2357 | |
5f5c8ee5 GM |
2358 | if (!STRINGP (it->string)) |
2359 | { | |
2360 | new_face_id | |
2361 | = face_at_buffer_position (it->w, | |
2362 | IT_CHARPOS (*it), | |
2363 | it->region_beg_charpos, | |
2364 | it->region_end_charpos, | |
2365 | &next_stop, | |
2366 | (IT_CHARPOS (*it) | |
2367 | + TEXT_PROP_DISTANCE_LIMIT), | |
2368 | 0); | |
2311178e | 2369 | |
5f5c8ee5 GM |
2370 | /* Is this a start of a run of characters with box face? |
2371 | Caveat: this can be called for a freshly initialized | |
4b41cebb | 2372 | iterator; face_id is -1 in this case. We know that the new |
5f5c8ee5 GM |
2373 | face will not change until limit, i.e. if the new face has a |
2374 | box, all characters up to limit will have one. But, as | |
2375 | usual, we don't know whether limit is really the end. */ | |
2376 | if (new_face_id != it->face_id) | |
2377 | { | |
2378 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2311178e | 2379 | |
5f5c8ee5 GM |
2380 | /* If new face has a box but old face has not, this is |
2381 | the start of a run of characters with box, i.e. it has | |
2382 | a shadow on the left side. The value of face_id of the | |
2383 | iterator will be -1 if this is the initial call that gets | |
2384 | the face. In this case, we have to look in front of IT's | |
2385 | position and see whether there is a face != new_face_id. */ | |
2386 | it->start_of_box_run_p | |
2387 | = (new_face->box != FACE_NO_BOX | |
2388 | && (it->face_id >= 0 | |
2389 | || IT_CHARPOS (*it) == BEG | |
2390 | || new_face_id != face_before_it_pos (it))); | |
2391 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2392 | } | |
2393 | } | |
2394 | else | |
2395 | { | |
06a12811 GM |
2396 | int base_face_id, bufpos; |
2397 | ||
2398 | if (it->current.overlay_string_index >= 0) | |
2399 | bufpos = IT_CHARPOS (*it); | |
2400 | else | |
2401 | bufpos = 0; | |
2311178e | 2402 | |
06a12811 GM |
2403 | /* For strings from a buffer, i.e. overlay strings or strings |
2404 | from a `display' property, use the face at IT's current | |
2405 | buffer position as the base face to merge with, so that | |
2406 | overlay strings appear in the same face as surrounding | |
2407 | text, unless they specify their own faces. */ | |
2408 | base_face_id = underlying_face_id (it); | |
2311178e | 2409 | |
06a12811 GM |
2410 | new_face_id = face_at_string_position (it->w, |
2411 | it->string, | |
2412 | IT_STRING_CHARPOS (*it), | |
2413 | bufpos, | |
2414 | it->region_beg_charpos, | |
2415 | it->region_end_charpos, | |
2416 | &next_stop, | |
5de7c6f2 | 2417 | base_face_id, 0); |
2311178e | 2418 | |
5f5c8ee5 GM |
2419 | #if 0 /* This shouldn't be neccessary. Let's check it. */ |
2420 | /* If IT is used to display a mode line we would really like to | |
2421 | use the mode line face instead of the frame's default face. */ | |
2422 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2423 | && new_face_id == DEFAULT_FACE_ID) | |
96d2320f | 2424 | new_face_id = CURRENT_MODE_LINE_FACE_ID (it->w); |
5f5c8ee5 | 2425 | #endif |
2311178e | 2426 | |
5f5c8ee5 GM |
2427 | /* Is this a start of a run of characters with box? Caveat: |
2428 | this can be called for a freshly allocated iterator; face_id | |
2429 | is -1 is this case. We know that the new face will not | |
2430 | change until the next check pos, i.e. if the new face has a | |
2431 | box, all characters up to that position will have a | |
2432 | box. But, as usual, we don't know whether that position | |
2433 | is really the end. */ | |
2434 | if (new_face_id != it->face_id) | |
2435 | { | |
2436 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2437 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2311178e | 2438 | |
5f5c8ee5 GM |
2439 | /* If new face has a box but old face hasn't, this is the |
2440 | start of a run of characters with box, i.e. it has a | |
2441 | shadow on the left side. */ | |
2442 | it->start_of_box_run_p | |
2443 | = new_face->box && (old_face == NULL || !old_face->box); | |
2444 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2445 | } | |
2446 | } | |
2311178e | 2447 | |
5f5c8ee5 | 2448 | it->face_id = new_face_id; |
5f5c8ee5 GM |
2449 | return HANDLED_NORMALLY; |
2450 | } | |
2451 | ||
2452 | ||
06a12811 GM |
2453 | /* Return the ID of the face ``underlying'' IT's current position, |
2454 | which is in a string. If the iterator is associated with a | |
2455 | buffer, return the face at IT's current buffer position. | |
2456 | Otherwise, use the iterator's base_face_id. */ | |
2457 | ||
2458 | static int | |
2459 | underlying_face_id (it) | |
2460 | struct it *it; | |
2461 | { | |
2462 | int face_id = it->base_face_id, i; | |
2463 | ||
2464 | xassert (STRINGP (it->string)); | |
2465 | ||
2466 | for (i = it->sp - 1; i >= 0; --i) | |
2467 | if (NILP (it->stack[i].string)) | |
2468 | face_id = it->stack[i].face_id; | |
2469 | ||
2470 | return face_id; | |
2471 | } | |
2472 | ||
2473 | ||
5f5c8ee5 GM |
2474 | /* Compute the face one character before or after the current position |
2475 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2476 | position. Value is the id of the face. */ | |
2477 | ||
2478 | static int | |
2479 | face_before_or_after_it_pos (it, before_p) | |
2480 | struct it *it; | |
2481 | int before_p; | |
2482 | { | |
2483 | int face_id, limit; | |
2484 | int next_check_charpos; | |
2485 | struct text_pos pos; | |
2486 | ||
2487 | xassert (it->s == NULL); | |
2311178e | 2488 | |
5f5c8ee5 GM |
2489 | if (STRINGP (it->string)) |
2490 | { | |
06a12811 | 2491 | int bufpos, base_face_id; |
2311178e | 2492 | |
5f5c8ee5 GM |
2493 | /* No face change past the end of the string (for the case |
2494 | we are padding with spaces). No face change before the | |
2495 | string start. */ | |
2051c264 | 2496 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string) |
5f5c8ee5 GM |
2497 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) |
2498 | return it->face_id; | |
2499 | ||
2500 | /* Set pos to the position before or after IT's current position. */ | |
2501 | if (before_p) | |
2502 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2503 | else | |
260a86a0 KH |
2504 | /* For composition, we must check the character after the |
2505 | composition. */ | |
2506 | pos = (it->what == IT_COMPOSITION | |
2507 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2508 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 2509 | |
06a12811 GM |
2510 | if (it->current.overlay_string_index >= 0) |
2511 | bufpos = IT_CHARPOS (*it); | |
2512 | else | |
2513 | bufpos = 0; | |
2514 | ||
2515 | base_face_id = underlying_face_id (it); | |
2516 | ||
5f5c8ee5 | 2517 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
2518 | face_id = face_at_string_position (it->w, |
2519 | it->string, | |
2520 | CHARPOS (pos), | |
2521 | bufpos, | |
2522 | it->region_beg_charpos, | |
2523 | it->region_end_charpos, | |
2524 | &next_check_charpos, | |
5de7c6f2 | 2525 | base_face_id, 0); |
5f5c8ee5 GM |
2526 | |
2527 | /* Correct the face for charsets different from ASCII. Do it | |
2528 | for the multibyte case only. The face returned above is | |
2529 | suitable for unibyte text if IT->string is unibyte. */ | |
2530 | if (STRING_MULTIBYTE (it->string)) | |
2531 | { | |
50f80c2f | 2532 | const unsigned char *p = SDATA (it->string) + BYTEPOS (pos); |
2051c264 | 2533 | int rest = SBYTES (it->string) - BYTEPOS (pos); |
980806b6 KH |
2534 | int c, len; |
2535 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2311178e | 2536 | |
4fdb80f2 | 2537 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2538 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2539 | } |
2540 | } | |
2541 | else | |
2542 | { | |
70851746 GM |
2543 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2544 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2545 | return it->face_id; | |
2311178e | 2546 | |
5f5c8ee5 GM |
2547 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2548 | pos = it->current.pos; | |
2311178e | 2549 | |
5f5c8ee5 | 2550 | if (before_p) |
c1005d06 | 2551 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2552 | else |
260a86a0 KH |
2553 | { |
2554 | if (it->what == IT_COMPOSITION) | |
2555 | /* For composition, we must check the position after the | |
2556 | composition. */ | |
2557 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2558 | else | |
c1005d06 | 2559 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2560 | } |
2311178e | 2561 | |
5f5c8ee5 GM |
2562 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2563 | face_id = face_at_buffer_position (it->w, | |
2564 | CHARPOS (pos), | |
2565 | it->region_beg_charpos, | |
2566 | it->region_end_charpos, | |
2567 | &next_check_charpos, | |
2568 | limit, 0); | |
2569 | ||
2570 | /* Correct the face for charsets different from ASCII. Do it | |
2571 | for the multibyte case only. The face returned above is | |
2572 | suitable for unibyte text if current_buffer is unibyte. */ | |
2573 | if (it->multibyte_p) | |
2574 | { | |
1d1b6e6a | 2575 | int c = FETCH_MULTIBYTE_CHAR (BYTEPOS (pos)); |
980806b6 KH |
2576 | struct face *face = FACE_FROM_ID (it->f, face_id); |
2577 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2578 | } |
2579 | } | |
2311178e | 2580 | |
5f5c8ee5 GM |
2581 | return face_id; |
2582 | } | |
2583 | ||
2584 | ||
2585 | \f | |
2586 | /*********************************************************************** | |
2587 | Invisible text | |
2588 | ***********************************************************************/ | |
2589 | ||
2590 | /* Set up iterator IT from invisible properties at its current | |
2591 | position. Called from handle_stop. */ | |
2592 | ||
2593 | static enum prop_handled | |
2594 | handle_invisible_prop (it) | |
2595 | struct it *it; | |
2596 | { | |
2597 | enum prop_handled handled = HANDLED_NORMALLY; | |
2598 | ||
2599 | if (STRINGP (it->string)) | |
2600 | { | |
2601 | extern Lisp_Object Qinvisible; | |
2602 | Lisp_Object prop, end_charpos, limit, charpos; | |
2603 | ||
2604 | /* Get the value of the invisible text property at the | |
2605 | current position. Value will be nil if there is no such | |
2606 | property. */ | |
ac90c44f | 2607 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2608 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
2609 | ||
eadc0bf8 GM |
2610 | if (!NILP (prop) |
2611 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2612 | { |
2613 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 2614 | |
5f5c8ee5 GM |
2615 | /* Get the position at which the next change of the |
2616 | invisible text property can be found in IT->string. | |
2617 | Value will be nil if the property value is the same for | |
2618 | all the rest of IT->string. */ | |
2051c264 | 2619 | XSETINT (limit, SCHARS (it->string)); |
5f5c8ee5 | 2620 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, |
2051c264 | 2621 | it->string, limit); |
2311178e | 2622 | |
5f5c8ee5 GM |
2623 | /* Text at current position is invisible. The next |
2624 | change in the property is at position end_charpos. | |
2625 | Move IT's current position to that position. */ | |
2626 | if (INTEGERP (end_charpos) | |
2627 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2628 | { | |
2629 | struct text_pos old; | |
2630 | old = it->current.string_pos; | |
2631 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2632 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2633 | } | |
2634 | else | |
2635 | { | |
2636 | /* The rest of the string is invisible. If this is an | |
2637 | overlay string, proceed with the next overlay string | |
2638 | or whatever comes and return a character from there. */ | |
2639 | if (it->current.overlay_string_index >= 0) | |
2640 | { | |
2641 | next_overlay_string (it); | |
2642 | /* Don't check for overlay strings when we just | |
2643 | finished processing them. */ | |
2644 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2645 | } | |
2646 | else | |
2647 | { | |
2051c264 GM |
2648 | IT_STRING_CHARPOS (*it) = SCHARS (it->string); |
2649 | IT_STRING_BYTEPOS (*it) = SBYTES (it->string); | |
5f5c8ee5 GM |
2650 | } |
2651 | } | |
2652 | } | |
2653 | } | |
2654 | else | |
2655 | { | |
8580a4e3 | 2656 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 2657 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
2658 | |
2659 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 2660 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 2661 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
2662 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
2663 | &overlay); | |
8580a4e3 SM |
2664 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
2665 | ||
5f5c8ee5 | 2666 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 2667 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
2668 | { |
2669 | /* Record whether we have to display an ellipsis for the | |
2670 | invisible text. */ | |
8580a4e3 | 2671 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
2672 | |
2673 | handled = HANDLED_RECOMPUTE_PROPS; | |
2311178e | 2674 | |
5f5c8ee5 GM |
2675 | /* Loop skipping over invisible text. The loop is left at |
2676 | ZV or with IT on the first char being visible again. */ | |
2677 | do | |
2678 | { | |
2679 | /* Try to skip some invisible text. Return value is the | |
2680 | position reached which can be equal to IT's position | |
2681 | if there is nothing invisible here. This skips both | |
2682 | over invisible text properties and overlays with | |
2683 | invisible property. */ | |
2684 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2685 | &next_stop, ZV, it->window); | |
2686 | ||
2687 | /* If we skipped nothing at all we weren't at invisible | |
2688 | text in the first place. If everything to the end of | |
2689 | the buffer was skipped, end the loop. */ | |
2690 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 2691 | invis_p = 0; |
5f5c8ee5 GM |
2692 | else |
2693 | { | |
2694 | /* We skipped some characters but not necessarily | |
2695 | all there are. Check if we ended up on visible | |
2696 | text. Fget_char_property returns the property of | |
2697 | the char before the given position, i.e. if we | |
8580a4e3 | 2698 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 2699 | newpos is visible. */ |
ac90c44f | 2700 | pos = make_number (newpos); |
5f5c8ee5 | 2701 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 2702 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 | 2703 | } |
2311178e | 2704 | |
5f5c8ee5 GM |
2705 | /* If we ended up on invisible text, proceed to |
2706 | skip starting with next_stop. */ | |
8580a4e3 | 2707 | if (invis_p) |
5f5c8ee5 GM |
2708 | IT_CHARPOS (*it) = next_stop; |
2709 | } | |
8580a4e3 | 2710 | while (invis_p); |
5a08cbaf | 2711 | |
5f5c8ee5 GM |
2712 | /* The position newpos is now either ZV or on visible text. */ |
2713 | IT_CHARPOS (*it) = newpos; | |
2714 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2311178e | 2715 | |
5a08cbaf GM |
2716 | /* If there are before-strings at the start of invisible |
2717 | text, and the text is invisible because of a text | |
2718 | property, arrange to show before-strings because 20.x did | |
2719 | it that way. (If the text is invisible because of an | |
2720 | overlay property instead of a text property, this is | |
2721 | already handled in the overlay code.) */ | |
2722 | if (NILP (overlay) | |
2723 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 2724 | { |
5a08cbaf GM |
2725 | handled = HANDLED_RECOMPUTE_PROPS; |
2726 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 2727 | } |
5a08cbaf GM |
2728 | else if (display_ellipsis_p) |
2729 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
2730 | } |
2731 | } | |
2732 | ||
2733 | return handled; | |
2734 | } | |
2735 | ||
2736 | ||
5a08cbaf GM |
2737 | /* Make iterator IT return `...' next. */ |
2738 | ||
2739 | static void | |
2740 | setup_for_ellipsis (it) | |
2741 | struct it *it; | |
2742 | { | |
2311178e | 2743 | if (it->dp |
5a08cbaf GM |
2744 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
2745 | { | |
2746 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2747 | it->dpvec = v->contents; | |
2748 | it->dpend = v->contents + v->size; | |
2749 | } | |
2311178e | 2750 | else |
5a08cbaf GM |
2751 | { |
2752 | /* Default `...'. */ | |
2753 | it->dpvec = default_invis_vector; | |
2754 | it->dpend = default_invis_vector + 3; | |
2755 | } | |
2311178e | 2756 | |
5a08cbaf GM |
2757 | /* The ellipsis display does not replace the display of the |
2758 | character at the new position. Indicate this by setting | |
2759 | IT->dpvec_char_len to zero. */ | |
2760 | it->dpvec_char_len = 0; | |
2311178e | 2761 | |
5a08cbaf GM |
2762 | it->current.dpvec_index = 0; |
2763 | it->method = next_element_from_display_vector; | |
2764 | } | |
2765 | ||
2766 | ||
5f5c8ee5 GM |
2767 | \f |
2768 | /*********************************************************************** | |
2769 | 'display' property | |
2770 | ***********************************************************************/ | |
2771 | ||
2772 | /* Set up iterator IT from `display' property at its current position. | |
2773 | Called from handle_stop. */ | |
2774 | ||
2775 | static enum prop_handled | |
2776 | handle_display_prop (it) | |
2777 | struct it *it; | |
2778 | { | |
2779 | Lisp_Object prop, object; | |
2780 | struct text_pos *position; | |
a61b7058 | 2781 | int display_replaced_p = 0; |
5f5c8ee5 GM |
2782 | |
2783 | if (STRINGP (it->string)) | |
2784 | { | |
2785 | object = it->string; | |
2786 | position = &it->current.string_pos; | |
2787 | } | |
2788 | else | |
2789 | { | |
221dd3e7 | 2790 | object = it->w->buffer; |
5f5c8ee5 GM |
2791 | position = &it->current.pos; |
2792 | } | |
2793 | ||
2794 | /* Reset those iterator values set from display property values. */ | |
2795 | it->font_height = Qnil; | |
2796 | it->space_width = Qnil; | |
2797 | it->voffset = 0; | |
2798 | ||
2799 | /* We don't support recursive `display' properties, i.e. string | |
2800 | values that have a string `display' property, that have a string | |
2801 | `display' property etc. */ | |
2802 | if (!it->string_from_display_prop_p) | |
2803 | it->area = TEXT_AREA; | |
2804 | ||
2805 | prop = Fget_char_property (make_number (position->charpos), | |
2806 | Qdisplay, object); | |
2807 | if (NILP (prop)) | |
2808 | return HANDLED_NORMALLY; | |
2809 | ||
f3751a65 | 2810 | if (CONSP (prop) |
12700f40 GM |
2811 | /* Simple properties. */ |
2812 | && !EQ (XCAR (prop), Qimage) | |
2813 | && !EQ (XCAR (prop), Qspace) | |
2814 | && !EQ (XCAR (prop), Qwhen) | |
2815 | && !EQ (XCAR (prop), Qspace_width) | |
2816 | && !EQ (XCAR (prop), Qheight) | |
2817 | && !EQ (XCAR (prop), Qraise) | |
2818 | /* Marginal area specifications. */ | |
2819 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
2820 | && !NILP (XCAR (prop))) | |
5f5c8ee5 | 2821 | { |
a61b7058 | 2822 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 2823 | { |
a61b7058 GM |
2824 | if (handle_single_display_prop (it, XCAR (prop), object, |
2825 | position, display_replaced_p)) | |
2826 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2827 | } |
2828 | } | |
2829 | else if (VECTORP (prop)) | |
2830 | { | |
2831 | int i; | |
a61b7058 GM |
2832 | for (i = 0; i < ASIZE (prop); ++i) |
2833 | if (handle_single_display_prop (it, AREF (prop, i), object, | |
2834 | position, display_replaced_p)) | |
2835 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2836 | } |
2837 | else | |
2838 | { | |
a61b7058 GM |
2839 | if (handle_single_display_prop (it, prop, object, position, 0)) |
2840 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2841 | } |
2842 | ||
a61b7058 | 2843 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
2844 | } |
2845 | ||
2846 | ||
6c577098 | 2847 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2848 | at START_POS in OBJECT. */ |
2849 | ||
2850 | static struct text_pos | |
2851 | display_prop_end (it, object, start_pos) | |
2852 | struct it *it; | |
2853 | Lisp_Object object; | |
2854 | struct text_pos start_pos; | |
2855 | { | |
2856 | Lisp_Object end; | |
2857 | struct text_pos end_pos; | |
5f5c8ee5 | 2858 | |
016b5642 MB |
2859 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
2860 | Qdisplay, object, Qnil); | |
6c577098 GM |
2861 | CHARPOS (end_pos) = XFASTINT (end); |
2862 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2863 | compute_string_pos (&end_pos, start_pos, it->string); |
2864 | else | |
6c577098 | 2865 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2866 | |
2867 | return end_pos; | |
2868 | } | |
2869 | ||
2870 | ||
2871 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2872 | is the object in which the `display' property was found. *POSITION | |
a61b7058 GM |
2873 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
2874 | means that we previously saw a display sub-property which already | |
2875 | replaced text display with something else, for example an image; | |
2876 | ignore such properties after the first one has been processed. | |
5f5c8ee5 GM |
2877 | |
2878 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2879 | end position of the `display' property. | |
2880 | ||
4b41cebb | 2881 | Value is non-zero if something was found which replaces the display |
a61b7058 | 2882 | of buffer or string text. */ |
5f5c8ee5 GM |
2883 | |
2884 | static int | |
a61b7058 GM |
2885 | handle_single_display_prop (it, prop, object, position, |
2886 | display_replaced_before_p) | |
5f5c8ee5 GM |
2887 | struct it *it; |
2888 | Lisp_Object prop; | |
2889 | Lisp_Object object; | |
2890 | struct text_pos *position; | |
a61b7058 | 2891 | int display_replaced_before_p; |
5f5c8ee5 GM |
2892 | { |
2893 | Lisp_Object value; | |
a61b7058 | 2894 | int replaces_text_display_p = 0; |
5f5c8ee5 GM |
2895 | Lisp_Object form; |
2896 | ||
d3acf96b | 2897 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
4b41cebb | 2898 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2899 | form = Qt; |
d3acf96b | 2900 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2901 | { |
2902 | prop = XCDR (prop); | |
2903 | if (!CONSP (prop)) | |
2904 | return 0; | |
2905 | form = XCAR (prop); | |
2906 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2907 | } |
2908 | ||
2909 | if (!NILP (form) && !EQ (form, Qt)) | |
2910 | { | |
331379bf | 2911 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 2912 | struct gcpro gcpro1; |
5f5c8ee5 | 2913 | |
b384d6f8 GM |
2914 | /* Bind `object' to the object having the `display' property, a |
2915 | buffer or string. Bind `position' to the position in the | |
2916 | object where the property was found, and `buffer-position' | |
2917 | to the current position in the buffer. */ | |
2918 | specbind (Qobject, object); | |
31ac723b SM |
2919 | specbind (Qposition, make_number (CHARPOS (*position))); |
2920 | specbind (Qbuffer_position, | |
2921 | make_number (STRINGP (object) | |
2922 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 2923 | GCPRO1 (form); |
116d6f5c | 2924 | form = safe_eval (form); |
b384d6f8 GM |
2925 | UNGCPRO; |
2926 | unbind_to (count, Qnil); | |
5f5c8ee5 | 2927 | } |
2311178e | 2928 | |
5f5c8ee5 GM |
2929 | if (NILP (form)) |
2930 | return 0; | |
2931 | ||
2932 | if (CONSP (prop) | |
2933 | && EQ (XCAR (prop), Qheight) | |
2934 | && CONSP (XCDR (prop))) | |
2935 | { | |
e4093f38 | 2936 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 | 2937 | return 0; |
2311178e | 2938 | |
5f5c8ee5 GM |
2939 | /* `(height HEIGHT)'. */ |
2940 | it->font_height = XCAR (XCDR (prop)); | |
2941 | if (!NILP (it->font_height)) | |
2942 | { | |
2943 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2944 | int new_height = -1; | |
2945 | ||
2946 | if (CONSP (it->font_height) | |
2947 | && (EQ (XCAR (it->font_height), Qplus) | |
2948 | || EQ (XCAR (it->font_height), Qminus)) | |
2949 | && CONSP (XCDR (it->font_height)) | |
2950 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2951 | { | |
2952 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2953 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2954 | if (EQ (XCAR (it->font_height), Qplus)) | |
2955 | steps = - steps; | |
2956 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2957 | } | |
0d8b31c0 | 2958 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
2959 | { |
2960 | /* Call function with current height as argument. | |
2961 | Value is the new height. */ | |
116d6f5c GM |
2962 | Lisp_Object height; |
2963 | height = safe_call1 (it->font_height, | |
2964 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
2965 | if (NUMBERP (height)) |
2966 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
2967 | } |
2968 | else if (NUMBERP (it->font_height)) | |
2969 | { | |
2970 | /* Value is a multiple of the canonical char height. */ | |
2971 | struct face *face; | |
2311178e | 2972 | |
5f5c8ee5 GM |
2973 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); |
2974 | new_height = (XFLOATINT (it->font_height) | |
2975 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2976 | } | |
2977 | else | |
2978 | { | |
2979 | /* Evaluate IT->font_height with `height' bound to the | |
2980 | current specified height to get the new height. */ | |
2981 | Lisp_Object value; | |
331379bf | 2982 | int count = SPECPDL_INDEX (); |
2311178e | 2983 | |
5f5c8ee5 | 2984 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); |
116d6f5c | 2985 | value = safe_eval (it->font_height); |
5f5c8ee5 | 2986 | unbind_to (count, Qnil); |
2311178e | 2987 | |
5f5c8ee5 GM |
2988 | if (NUMBERP (value)) |
2989 | new_height = XFLOATINT (value); | |
2990 | } | |
2311178e | 2991 | |
5f5c8ee5 GM |
2992 | if (new_height > 0) |
2993 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2994 | } | |
2995 | } | |
2996 | else if (CONSP (prop) | |
2997 | && EQ (XCAR (prop), Qspace_width) | |
2998 | && CONSP (XCDR (prop))) | |
2999 | { | |
3000 | /* `(space_width WIDTH)'. */ | |
e4093f38 | 3001 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3002 | return 0; |
2311178e | 3003 | |
5f5c8ee5 GM |
3004 | value = XCAR (XCDR (prop)); |
3005 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
3006 | it->space_width = value; | |
3007 | } | |
3008 | else if (CONSP (prop) | |
3009 | && EQ (XCAR (prop), Qraise) | |
3010 | && CONSP (XCDR (prop))) | |
3011 | { | |
5f5c8ee5 | 3012 | /* `(raise FACTOR)'. */ |
e4093f38 | 3013 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 3014 | return 0; |
2311178e | 3015 | |
fb3842a8 | 3016 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
3017 | value = XCAR (XCDR (prop)); |
3018 | if (NUMBERP (value)) | |
3019 | { | |
3020 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
3021 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 3022 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
3023 | } |
3024 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3025 | } | |
3026 | else if (!it->string_from_display_prop_p) | |
3027 | { | |
f3751a65 | 3028 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
4b41cebb | 3029 | VALUE) or `((margin nil) VALUE)' or VALUE. */ |
5f5c8ee5 GM |
3030 | Lisp_Object location, value; |
3031 | struct text_pos start_pos; | |
3032 | int valid_p; | |
3033 | ||
3034 | /* Characters having this form of property are not displayed, so | |
3035 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
3036 | start_pos = *position; |
3037 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 3038 | value = Qnil; |
5f5c8ee5 GM |
3039 | |
3040 | /* Let's stop at the new position and assume that all | |
3041 | text properties change there. */ | |
3042 | it->stop_charpos = position->charpos; | |
3043 | ||
f3751a65 GM |
3044 | location = Qunbound; |
3045 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 3046 | { |
f3751a65 | 3047 | Lisp_Object tem; |
2311178e | 3048 | |
5f5c8ee5 | 3049 | value = XCDR (prop); |
f3751a65 GM |
3050 | if (CONSP (value)) |
3051 | value = XCAR (value); | |
3052 | ||
3053 | tem = XCAR (prop); | |
3054 | if (EQ (XCAR (tem), Qmargin) | |
3055 | && (tem = XCDR (tem), | |
3056 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
3057 | (NILP (tem) | |
3058 | || EQ (tem, Qleft_margin) | |
3059 | || EQ (tem, Qright_margin)))) | |
3060 | location = tem; | |
5f5c8ee5 | 3061 | } |
f3751a65 GM |
3062 | |
3063 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
3064 | { |
3065 | location = Qnil; | |
3066 | value = prop; | |
3067 | } | |
3068 | ||
3069 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 3070 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
3071 | valid_p = STRINGP (value); |
3072 | else | |
3073 | valid_p = (STRINGP (value) | |
3074 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3075 | || valid_image_p (value)); | |
3076 | #else /* not HAVE_WINDOW_SYSTEM */ | |
3077 | valid_p = STRINGP (value); | |
3078 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2311178e | 3079 | |
5f5c8ee5 GM |
3080 | if ((EQ (location, Qleft_margin) |
3081 | || EQ (location, Qright_margin) | |
3082 | || NILP (location)) | |
a61b7058 GM |
3083 | && valid_p |
3084 | && !display_replaced_before_p) | |
5f5c8ee5 | 3085 | { |
a61b7058 | 3086 | replaces_text_display_p = 1; |
2311178e | 3087 | |
5f5c8ee5 GM |
3088 | /* Save current settings of IT so that we can restore them |
3089 | when we are finished with the glyph property value. */ | |
3090 | push_it (it); | |
2311178e | 3091 | |
5f5c8ee5 GM |
3092 | if (NILP (location)) |
3093 | it->area = TEXT_AREA; | |
3094 | else if (EQ (location, Qleft_margin)) | |
3095 | it->area = LEFT_MARGIN_AREA; | |
3096 | else | |
3097 | it->area = RIGHT_MARGIN_AREA; | |
2311178e | 3098 | |
5f5c8ee5 GM |
3099 | if (STRINGP (value)) |
3100 | { | |
3101 | it->string = value; | |
3102 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3103 | it->current.overlay_string_index = -1; | |
3104 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2051c264 | 3105 | it->end_charpos = it->string_nchars = SCHARS (it->string); |
5f5c8ee5 GM |
3106 | it->method = next_element_from_string; |
3107 | it->stop_charpos = 0; | |
3108 | it->string_from_display_prop_p = 1; | |
e187cf71 GM |
3109 | /* Say that we haven't consumed the characters with |
3110 | `display' property yet. The call to pop_it in | |
3111 | set_iterator_to_next will clean this up. */ | |
3112 | *position = start_pos; | |
5f5c8ee5 GM |
3113 | } |
3114 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3115 | { | |
3116 | it->method = next_element_from_stretch; | |
3117 | it->object = value; | |
3118 | it->current.pos = it->position = start_pos; | |
3119 | } | |
3120 | #ifdef HAVE_WINDOW_SYSTEM | |
3121 | else | |
3122 | { | |
3123 | it->what = IT_IMAGE; | |
3124 | it->image_id = lookup_image (it->f, value); | |
3125 | it->position = start_pos; | |
3126 | it->object = NILP (object) ? it->w->buffer : object; | |
3127 | it->method = next_element_from_image; | |
2311178e | 3128 | |
02513cdd | 3129 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
3130 | `display' property yet. The call to pop_it in |
3131 | set_iterator_to_next will clean this up. */ | |
3132 | *position = start_pos; | |
3133 | } | |
3134 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3135 | } | |
a21a3943 GM |
3136 | else |
3137 | /* Invalid property or property not supported. Restore | |
3138 | the position to what it was before. */ | |
3139 | *position = start_pos; | |
5f5c8ee5 GM |
3140 | } |
3141 | ||
a61b7058 | 3142 | return replaces_text_display_p; |
5f5c8ee5 GM |
3143 | } |
3144 | ||
3145 | ||
06568bbf GM |
3146 | /* Check if PROP is a display sub-property value whose text should be |
3147 | treated as intangible. */ | |
3148 | ||
3149 | static int | |
3150 | single_display_prop_intangible_p (prop) | |
3151 | Lisp_Object prop; | |
3152 | { | |
3153 | /* Skip over `when FORM'. */ | |
3154 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3155 | { | |
3156 | prop = XCDR (prop); | |
3157 | if (!CONSP (prop)) | |
3158 | return 0; | |
3159 | prop = XCDR (prop); | |
3160 | } | |
3161 | ||
959bc044 SM |
3162 | if (STRINGP (prop)) |
3163 | return 1; | |
3164 | ||
06568bbf GM |
3165 | if (!CONSP (prop)) |
3166 | return 0; | |
3167 | ||
3168 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
3169 | we don't need to treat text as intangible. */ | |
3170 | if (EQ (XCAR (prop), Qmargin)) | |
3171 | { | |
3172 | prop = XCDR (prop); | |
3173 | if (!CONSP (prop)) | |
3174 | return 0; | |
3175 | ||
3176 | prop = XCDR (prop); | |
3177 | if (!CONSP (prop) | |
3178 | || EQ (XCAR (prop), Qleft_margin) | |
3179 | || EQ (XCAR (prop), Qright_margin)) | |
3180 | return 0; | |
3181 | } | |
2311178e | 3182 | |
06568bbf GM |
3183 | return CONSP (prop) && EQ (XCAR (prop), Qimage); |
3184 | } | |
3185 | ||
3186 | ||
3187 | /* Check if PROP is a display property value whose text should be | |
3188 | treated as intangible. */ | |
3189 | ||
3190 | int | |
3191 | display_prop_intangible_p (prop) | |
3192 | Lisp_Object prop; | |
3193 | { | |
3194 | if (CONSP (prop) | |
3195 | && CONSP (XCAR (prop)) | |
3196 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3197 | { | |
3198 | /* A list of sub-properties. */ | |
3199 | while (CONSP (prop)) | |
3200 | { | |
3201 | if (single_display_prop_intangible_p (XCAR (prop))) | |
3202 | return 1; | |
3203 | prop = XCDR (prop); | |
3204 | } | |
3205 | } | |
3206 | else if (VECTORP (prop)) | |
3207 | { | |
3208 | /* A vector of sub-properties. */ | |
3209 | int i; | |
a61b7058 GM |
3210 | for (i = 0; i < ASIZE (prop); ++i) |
3211 | if (single_display_prop_intangible_p (AREF (prop, i))) | |
06568bbf GM |
3212 | return 1; |
3213 | } | |
3214 | else | |
3215 | return single_display_prop_intangible_p (prop); | |
3216 | ||
3217 | return 0; | |
3218 | } | |
3219 | ||
74bd6d65 GM |
3220 | |
3221 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
3222 | ||
3223 | static int | |
3224 | single_display_prop_string_p (prop, string) | |
3225 | Lisp_Object prop, string; | |
3226 | { | |
74bd6d65 GM |
3227 | if (EQ (string, prop)) |
3228 | return 1; | |
2311178e | 3229 | |
74bd6d65 GM |
3230 | /* Skip over `when FORM'. */ |
3231 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3232 | { | |
3233 | prop = XCDR (prop); | |
3234 | if (!CONSP (prop)) | |
3235 | return 0; | |
3236 | prop = XCDR (prop); | |
3237 | } | |
3238 | ||
3239 | if (CONSP (prop)) | |
3240 | /* Skip over `margin LOCATION'. */ | |
3241 | if (EQ (XCAR (prop), Qmargin)) | |
3242 | { | |
3243 | prop = XCDR (prop); | |
3244 | if (!CONSP (prop)) | |
3245 | return 0; | |
3246 | ||
3247 | prop = XCDR (prop); | |
3248 | if (!CONSP (prop)) | |
3249 | return 0; | |
3250 | } | |
2311178e | 3251 | |
74bd6d65 GM |
3252 | return CONSP (prop) && EQ (XCAR (prop), string); |
3253 | } | |
3254 | ||
3255 | ||
3256 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
3257 | ||
3258 | static int | |
3259 | display_prop_string_p (prop, string) | |
3260 | Lisp_Object prop, string; | |
3261 | { | |
74bd6d65 GM |
3262 | if (CONSP (prop) |
3263 | && CONSP (XCAR (prop)) | |
3264 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3265 | { | |
3266 | /* A list of sub-properties. */ | |
3267 | while (CONSP (prop)) | |
3268 | { | |
3269 | if (single_display_prop_string_p (XCAR (prop), string)) | |
3270 | return 1; | |
3271 | prop = XCDR (prop); | |
3272 | } | |
3273 | } | |
3274 | else if (VECTORP (prop)) | |
3275 | { | |
3276 | /* A vector of sub-properties. */ | |
3277 | int i; | |
3278 | for (i = 0; i < ASIZE (prop); ++i) | |
3279 | if (single_display_prop_string_p (AREF (prop, i), string)) | |
3280 | return 1; | |
3281 | } | |
3282 | else | |
3283 | return single_display_prop_string_p (prop, string); | |
3284 | ||
3285 | return 0; | |
3286 | } | |
3287 | ||
3288 | ||
3289 | /* Determine from which buffer position in W's buffer STRING comes | |
3290 | from. AROUND_CHARPOS is an approximate position where it could | |
3291 | be from. Value is the buffer position or 0 if it couldn't be | |
3292 | determined. | |
3293 | ||
3294 | W's buffer must be current. | |
3295 | ||
3296 | This function is necessary because we don't record buffer positions | |
3297 | in glyphs generated from strings (to keep struct glyph small). | |
3298 | This function may only use code that doesn't eval because it is | |
3299 | called asynchronously from note_mouse_highlight. */ | |
3300 | ||
3301 | int | |
3302 | string_buffer_position (w, string, around_charpos) | |
3303 | struct window *w; | |
3304 | Lisp_Object string; | |
3305 | int around_charpos; | |
3306 | { | |
74bd6d65 GM |
3307 | Lisp_Object limit, prop, pos; |
3308 | const int MAX_DISTANCE = 1000; | |
3309 | int found = 0; | |
3310 | ||
d8731202 | 3311 | pos = make_number (around_charpos); |
74bd6d65 GM |
3312 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
3313 | while (!found && !EQ (pos, limit)) | |
3314 | { | |
3315 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3316 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3317 | found = 1; | |
3318 | else | |
134d9283 | 3319 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
3320 | } |
3321 | ||
3322 | if (!found) | |
3323 | { | |
d8731202 | 3324 | pos = make_number (around_charpos); |
74bd6d65 GM |
3325 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
3326 | while (!found && !EQ (pos, limit)) | |
3327 | { | |
3328 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3329 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3330 | found = 1; | |
3331 | else | |
134d9283 GM |
3332 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
3333 | limit); | |
74bd6d65 GM |
3334 | } |
3335 | } | |
3336 | ||
3337 | return found ? XINT (pos) : 0; | |
3338 | } | |
3339 | ||
3340 | ||
5f5c8ee5 | 3341 | \f |
260a86a0 KH |
3342 | /*********************************************************************** |
3343 | `composition' property | |
3344 | ***********************************************************************/ | |
3345 | ||
3346 | /* Set up iterator IT from `composition' property at its current | |
3347 | position. Called from handle_stop. */ | |
3348 | ||
3349 | static enum prop_handled | |
3350 | handle_composition_prop (it) | |
3351 | struct it *it; | |
3352 | { | |
3353 | Lisp_Object prop, string; | |
3354 | int pos, pos_byte, end; | |
3355 | enum prop_handled handled = HANDLED_NORMALLY; | |
3356 | ||
3357 | if (STRINGP (it->string)) | |
3358 | { | |
3359 | pos = IT_STRING_CHARPOS (*it); | |
3360 | pos_byte = IT_STRING_BYTEPOS (*it); | |
3361 | string = it->string; | |
3362 | } | |
3363 | else | |
3364 | { | |
3365 | pos = IT_CHARPOS (*it); | |
3366 | pos_byte = IT_BYTEPOS (*it); | |
3367 | string = Qnil; | |
3368 | } | |
3369 | ||
3370 | /* If there's a valid composition and point is not inside of the | |
3371 | composition (in the case that the composition is from the current | |
3372 | buffer), draw a glyph composed from the composition components. */ | |
3373 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
3374 | && COMPOSITION_VALID_P (pos, end, prop) | |
3375 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
3376 | { | |
3377 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
3378 | ||
3379 | if (id >= 0) | |
3380 | { | |
3381 | it->method = next_element_from_composition; | |
3382 | it->cmp_id = id; | |
3383 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
3384 | /* For a terminal, draw only the first character of the | |
3385 | components. */ | |
3386 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
3387 | it->len = (STRINGP (it->string) | |
3388 | ? string_char_to_byte (it->string, end) | |
3389 | : CHAR_TO_BYTE (end)) - pos_byte; | |
3390 | it->stop_charpos = end; | |
3391 | handled = HANDLED_RETURN; | |
3392 | } | |
3393 | } | |
3394 | ||
3395 | return handled; | |
3396 | } | |
3397 | ||
3398 | ||
3399 | \f | |
5f5c8ee5 GM |
3400 | /*********************************************************************** |
3401 | Overlay strings | |
3402 | ***********************************************************************/ | |
3403 | ||
3404 | /* The following structure is used to record overlay strings for | |
3405 | later sorting in load_overlay_strings. */ | |
3406 | ||
3407 | struct overlay_entry | |
3408 | { | |
2970b9be | 3409 | Lisp_Object overlay; |
5f5c8ee5 GM |
3410 | Lisp_Object string; |
3411 | int priority; | |
3412 | int after_string_p; | |
3413 | }; | |
3414 | ||
3415 | ||
3416 | /* Set up iterator IT from overlay strings at its current position. | |
3417 | Called from handle_stop. */ | |
3418 | ||
3419 | static enum prop_handled | |
3420 | handle_overlay_change (it) | |
3421 | struct it *it; | |
3422 | { | |
5a08cbaf | 3423 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 3424 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 3425 | else |
2970b9be | 3426 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
3427 | } |
3428 | ||
3429 | ||
3430 | /* Set up the next overlay string for delivery by IT, if there is an | |
3431 | overlay string to deliver. Called by set_iterator_to_next when the | |
3432 | end of the current overlay string is reached. If there are more | |
3433 | overlay strings to display, IT->string and | |
3434 | IT->current.overlay_string_index are set appropriately here. | |
3435 | Otherwise IT->string is set to nil. */ | |
2311178e | 3436 | |
5f5c8ee5 GM |
3437 | static void |
3438 | next_overlay_string (it) | |
3439 | struct it *it; | |
3440 | { | |
3441 | ++it->current.overlay_string_index; | |
3442 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
3443 | { | |
3444 | /* No more overlay strings. Restore IT's settings to what | |
3445 | they were before overlay strings were processed, and | |
3446 | continue to deliver from current_buffer. */ | |
5a08cbaf | 3447 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
2311178e | 3448 | |
5f5c8ee5 GM |
3449 | pop_it (it); |
3450 | xassert (it->stop_charpos >= BEGV | |
3451 | && it->stop_charpos <= it->end_charpos); | |
3452 | it->string = Qnil; | |
3453 | it->current.overlay_string_index = -1; | |
3454 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
3455 | it->n_overlay_strings = 0; | |
3456 | it->method = next_element_from_buffer; | |
2970b9be GM |
3457 | |
3458 | /* If we're at the end of the buffer, record that we have | |
3459 | processed the overlay strings there already, so that | |
3460 | next_element_from_buffer doesn't try it again. */ | |
3461 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3462 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
3463 | |
3464 | /* If we have to display `...' for invisible text, set | |
3465 | the iterator up for that. */ | |
3466 | if (display_ellipsis_p) | |
3467 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3468 | } |
3469 | else | |
3470 | { | |
3471 | /* There are more overlay strings to process. If | |
3472 | IT->current.overlay_string_index has advanced to a position | |
3473 | where we must load IT->overlay_strings with more strings, do | |
3474 | it. */ | |
3475 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2311178e | 3476 | |
5f5c8ee5 | 3477 | if (it->current.overlay_string_index && i == 0) |
5a08cbaf | 3478 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
3479 | |
3480 | /* Initialize IT to deliver display elements from the overlay | |
3481 | string. */ | |
3482 | it->string = it->overlay_strings[i]; | |
3483 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3484 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
3485 | it->method = next_element_from_string; | |
3486 | it->stop_charpos = 0; | |
3487 | } | |
2311178e | 3488 | |
5f5c8ee5 GM |
3489 | CHECK_IT (it); |
3490 | } | |
3491 | ||
3492 | ||
3493 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
3494 | comparison function for qsort in load_overlay_strings. Overlay | |
3495 | strings for the same position are sorted so that | |
3496 | ||
2970b9be GM |
3497 | 1. All after-strings come in front of before-strings, except |
3498 | when they come from the same overlay. | |
2311178e | 3499 | |
5f5c8ee5 GM |
3500 | 2. Within after-strings, strings are sorted so that overlay strings |
3501 | from overlays with higher priorities come first. | |
3502 | ||
3503 | 2. Within before-strings, strings are sorted so that overlay | |
3504 | strings from overlays with higher priorities come last. | |
3505 | ||
3506 | Value is analogous to strcmp. */ | |
3507 | ||
2311178e | 3508 | |
5f5c8ee5 GM |
3509 | static int |
3510 | compare_overlay_entries (e1, e2) | |
3511 | void *e1, *e2; | |
3512 | { | |
3513 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
3514 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
3515 | int result; | |
3516 | ||
3517 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
3518 | { |
3519 | /* Let after-strings appear in front of before-strings if | |
3520 | they come from different overlays. */ | |
3521 | if (EQ (entry1->overlay, entry2->overlay)) | |
3522 | result = entry1->after_string_p ? 1 : -1; | |
3523 | else | |
3524 | result = entry1->after_string_p ? -1 : 1; | |
3525 | } | |
5f5c8ee5 GM |
3526 | else if (entry1->after_string_p) |
3527 | /* After-strings sorted in order of decreasing priority. */ | |
3528 | result = entry2->priority - entry1->priority; | |
3529 | else | |
3530 | /* Before-strings sorted in order of increasing priority. */ | |
3531 | result = entry1->priority - entry2->priority; | |
3532 | ||
3533 | return result; | |
3534 | } | |
3535 | ||
3536 | ||
3537 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
3538 | current buffer position, or from CHARPOS if that is > 0. Set |
3539 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
3540 | |
3541 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
3542 | a time. On entry into load_overlay_strings, | |
3543 | IT->current.overlay_string_index gives the number of overlay | |
3544 | strings that have already been loaded by previous calls to this | |
3545 | function. | |
3546 | ||
2970b9be GM |
3547 | IT->add_overlay_start contains an additional overlay start |
3548 | position to consider for taking overlay strings from, if non-zero. | |
3549 | This position comes into play when the overlay has an `invisible' | |
3550 | property, and both before and after-strings. When we've skipped to | |
3551 | the end of the overlay, because of its `invisible' property, we | |
3552 | nevertheless want its before-string to appear. | |
3553 | IT->add_overlay_start will contain the overlay start position | |
3554 | in this case. | |
3555 | ||
5f5c8ee5 GM |
3556 | Overlay strings are sorted so that after-string strings come in |
3557 | front of before-string strings. Within before and after-strings, | |
3558 | strings are sorted by overlay priority. See also function | |
3559 | compare_overlay_entries. */ | |
2311178e | 3560 | |
5f5c8ee5 | 3561 | static void |
5a08cbaf | 3562 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 3563 | struct it *it; |
5a08cbaf | 3564 | int charpos; |
5f5c8ee5 GM |
3565 | { |
3566 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
cafafe0b | 3567 | Lisp_Object ov, overlay, window, str, invisible; |
5f5c8ee5 GM |
3568 | int start, end; |
3569 | int size = 20; | |
cafafe0b | 3570 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
3571 | struct overlay_entry *entries |
3572 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
3573 | |
3574 | if (charpos <= 0) | |
3575 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
3576 | |
3577 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
3578 | `entries' which has size `size' and currently contains `n' | |
3579 | elements. AFTER_P non-zero means STRING is an after-string of | |
3580 | OVERLAY. */ | |
3581 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
3582 | do \ | |
3583 | { \ | |
3584 | Lisp_Object priority; \ | |
3585 | \ | |
3586 | if (n == size) \ | |
3587 | { \ | |
3588 | int new_size = 2 * size; \ | |
3589 | struct overlay_entry *old = entries; \ | |
3590 | entries = \ | |
3591 | (struct overlay_entry *) alloca (new_size \ | |
3592 | * sizeof *entries); \ | |
3593 | bcopy (old, entries, size * sizeof *entries); \ | |
3594 | size = new_size; \ | |
3595 | } \ | |
3596 | \ | |
3597 | entries[n].string = (STRING); \ | |
2970b9be | 3598 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 3599 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 3600 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
3601 | entries[n].after_string_p = (AFTER_P); \ |
3602 | ++n; \ | |
3603 | } \ | |
3604 | while (0) | |
3605 | ||
3606 | /* Process overlay before the overlay center. */ | |
2970b9be | 3607 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3608 | { |
9472f927 | 3609 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3610 | xassert (OVERLAYP (overlay)); |
3611 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3612 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2311178e | 3613 | |
cafafe0b | 3614 | if (end < charpos) |
5f5c8ee5 GM |
3615 | break; |
3616 | ||
3617 | /* Skip this overlay if it doesn't start or end at IT's current | |
3618 | position. */ | |
cafafe0b | 3619 | if (end != charpos && start != charpos) |
5f5c8ee5 | 3620 | continue; |
2311178e | 3621 | |
5f5c8ee5 GM |
3622 | /* Skip this overlay if it doesn't apply to IT->w. */ |
3623 | window = Foverlay_get (overlay, Qwindow); | |
3624 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3625 | continue; | |
3626 | ||
cafafe0b GM |
3627 | /* If the text ``under'' the overlay is invisible, both before- |
3628 | and after-strings from this overlay are visible; start and | |
3629 | end position are indistinguishable. */ | |
3630 | invisible = Foverlay_get (overlay, Qinvisible); | |
3631 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3632 | ||
5f5c8ee5 | 3633 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3634 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 3635 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 3636 | && SCHARS (str)) |
5f5c8ee5 | 3637 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 3638 | |
5f5c8ee5 | 3639 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 3640 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 3641 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 3642 | && SCHARS (str)) |
5f5c8ee5 GM |
3643 | RECORD_OVERLAY_STRING (overlay, str, 1); |
3644 | } | |
2311178e | 3645 | |
5f5c8ee5 | 3646 | /* Process overlays after the overlay center. */ |
2970b9be | 3647 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3648 | { |
9472f927 | 3649 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3650 | xassert (OVERLAYP (overlay)); |
3651 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3652 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3653 | ||
cafafe0b | 3654 | if (start > charpos) |
5f5c8ee5 | 3655 | break; |
2311178e | 3656 | |
5f5c8ee5 GM |
3657 | /* Skip this overlay if it doesn't start or end at IT's current |
3658 | position. */ | |
cafafe0b | 3659 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3660 | continue; |
3661 | ||
3662 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3663 | window = Foverlay_get (overlay, Qwindow); | |
3664 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3665 | continue; | |
2311178e | 3666 | |
cafafe0b GM |
3667 | /* If the text ``under'' the overlay is invisible, it has a zero |
3668 | dimension, and both before- and after-strings apply. */ | |
3669 | invisible = Foverlay_get (overlay, Qinvisible); | |
3670 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3671 | ||
5f5c8ee5 | 3672 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3673 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 3674 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 3675 | && SCHARS (str)) |
5f5c8ee5 | 3676 | RECORD_OVERLAY_STRING (overlay, str, 0); |
2311178e | 3677 | |
5f5c8ee5 | 3678 | /* If overlay has a non-empty after-string, record it. */ |
cafafe0b | 3679 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 3680 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 3681 | && SCHARS (str)) |
5f5c8ee5 GM |
3682 | RECORD_OVERLAY_STRING (overlay, str, 1); |
3683 | } | |
3684 | ||
3685 | #undef RECORD_OVERLAY_STRING | |
2311178e | 3686 | |
5f5c8ee5 | 3687 | /* Sort entries. */ |
cafafe0b | 3688 | if (n > 1) |
2970b9be | 3689 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
3690 | |
3691 | /* Record the total number of strings to process. */ | |
3692 | it->n_overlay_strings = n; | |
3693 | ||
3694 | /* IT->current.overlay_string_index is the number of overlay strings | |
3695 | that have already been consumed by IT. Copy some of the | |
3696 | remaining overlay strings to IT->overlay_strings. */ | |
3697 | i = 0; | |
3698 | j = it->current.overlay_string_index; | |
3699 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
3700 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 3701 | |
5f5c8ee5 GM |
3702 | CHECK_IT (it); |
3703 | } | |
3704 | ||
3705 | ||
3706 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
3707 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
3708 | least one overlay string was found. */ | |
5f5c8ee5 GM |
3709 | |
3710 | static int | |
5a08cbaf | 3711 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 3712 | struct it *it; |
5a08cbaf | 3713 | int charpos; |
5f5c8ee5 GM |
3714 | { |
3715 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
3716 | process. This fills IT->overlay_strings with strings, and sets | |
3717 | IT->n_overlay_strings to the total number of strings to process. | |
3718 | IT->pos.overlay_string_index has to be set temporarily to zero | |
3719 | because load_overlay_strings needs this; it must be set to -1 | |
3720 | when no overlay strings are found because a zero value would | |
3721 | indicate a position in the first overlay string. */ | |
3722 | it->current.overlay_string_index = 0; | |
5a08cbaf | 3723 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
3724 | |
3725 | /* If we found overlay strings, set up IT to deliver display | |
3726 | elements from the first one. Otherwise set up IT to deliver | |
3727 | from current_buffer. */ | |
3728 | if (it->n_overlay_strings) | |
3729 | { | |
3730 | /* Make sure we know settings in current_buffer, so that we can | |
3731 | restore meaningful values when we're done with the overlay | |
3732 | strings. */ | |
3733 | compute_stop_pos (it); | |
3734 | xassert (it->face_id >= 0); | |
2311178e | 3735 | |
5f5c8ee5 GM |
3736 | /* Save IT's settings. They are restored after all overlay |
3737 | strings have been processed. */ | |
3738 | xassert (it->sp == 0); | |
3739 | push_it (it); | |
3740 | ||
3741 | /* Set up IT to deliver display elements from the first overlay | |
3742 | string. */ | |
3743 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 3744 | it->string = it->overlay_strings[0]; |
b2046df8 | 3745 | it->stop_charpos = 0; |
5f5c8ee5 | 3746 | xassert (STRINGP (it->string)); |
2051c264 | 3747 | it->end_charpos = SCHARS (it->string); |
d5db4077 | 3748 | it->multibyte_p = STRING_MULTIBYTE (it->string); |
5f5c8ee5 GM |
3749 | it->method = next_element_from_string; |
3750 | } | |
3751 | else | |
3752 | { | |
3753 | it->string = Qnil; | |
3754 | it->current.overlay_string_index = -1; | |
3755 | it->method = next_element_from_buffer; | |
3756 | } | |
3757 | ||
3758 | CHECK_IT (it); | |
3759 | ||
3760 | /* Value is non-zero if we found at least one overlay string. */ | |
3761 | return STRINGP (it->string); | |
3762 | } | |
3763 | ||
3764 | ||
3765 | \f | |
3766 | /*********************************************************************** | |
3767 | Saving and restoring state | |
3768 | ***********************************************************************/ | |
3769 | ||
3770 | /* Save current settings of IT on IT->stack. Called, for example, | |
3771 | before setting up IT for an overlay string, to be able to restore | |
3772 | IT's settings to what they were after the overlay string has been | |
3773 | processed. */ | |
3774 | ||
3775 | static void | |
3776 | push_it (it) | |
3777 | struct it *it; | |
3778 | { | |
3779 | struct iterator_stack_entry *p; | |
2311178e | 3780 | |
5f5c8ee5 GM |
3781 | xassert (it->sp < 2); |
3782 | p = it->stack + it->sp; | |
3783 | ||
3784 | p->stop_charpos = it->stop_charpos; | |
3785 | xassert (it->face_id >= 0); | |
3786 | p->face_id = it->face_id; | |
3787 | p->string = it->string; | |
3788 | p->pos = it->current; | |
3789 | p->end_charpos = it->end_charpos; | |
3790 | p->string_nchars = it->string_nchars; | |
3791 | p->area = it->area; | |
3792 | p->multibyte_p = it->multibyte_p; | |
3793 | p->space_width = it->space_width; | |
3794 | p->font_height = it->font_height; | |
3795 | p->voffset = it->voffset; | |
3796 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 3797 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
3798 | ++it->sp; |
3799 | } | |
3800 | ||
3801 | ||
3802 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
3803 | more overlay strings must be processed, and we return to delivering | |
3804 | display elements from a buffer, or when the end of a string from a | |
3805 | `display' property is reached and we return to delivering display | |
3806 | elements from an overlay string, or from a buffer. */ | |
3807 | ||
3808 | static void | |
3809 | pop_it (it) | |
3810 | struct it *it; | |
3811 | { | |
3812 | struct iterator_stack_entry *p; | |
2311178e | 3813 | |
5f5c8ee5 GM |
3814 | xassert (it->sp > 0); |
3815 | --it->sp; | |
3816 | p = it->stack + it->sp; | |
3817 | it->stop_charpos = p->stop_charpos; | |
3818 | it->face_id = p->face_id; | |
3819 | it->string = p->string; | |
3820 | it->current = p->pos; | |
3821 | it->end_charpos = p->end_charpos; | |
3822 | it->string_nchars = p->string_nchars; | |
3823 | it->area = p->area; | |
3824 | it->multibyte_p = p->multibyte_p; | |
3825 | it->space_width = p->space_width; | |
3826 | it->font_height = p->font_height; | |
3827 | it->voffset = p->voffset; | |
3828 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3829 | } | |
3830 | ||
3831 | ||
3832 | \f | |
3833 | /*********************************************************************** | |
3834 | Moving over lines | |
3835 | ***********************************************************************/ | |
3836 | ||
3837 | /* Set IT's current position to the previous line start. */ | |
3838 | ||
3839 | static void | |
3840 | back_to_previous_line_start (it) | |
3841 | struct it *it; | |
3842 | { | |
3843 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3844 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3845 | } | |
3846 | ||
3847 | ||
cafafe0b | 3848 | /* Move IT to the next line start. |
2311178e | 3849 | |
cafafe0b GM |
3850 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if |
3851 | we skipped over part of the text (as opposed to moving the iterator | |
3852 | continuously over the text). Otherwise, don't change the value | |
3853 | of *SKIPPED_P. | |
2311178e | 3854 | |
cafafe0b GM |
3855 | Newlines may come from buffer text, overlay strings, or strings |
3856 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
3857 | simply use find_next_newline_no_quit. |
3858 | ||
3859 | Note that this function may not skip over invisible text that is so | |
3860 | because of text properties and immediately follows a newline. If | |
3861 | it would, function reseat_at_next_visible_line_start, when called | |
3862 | from set_iterator_to_next, would effectively make invisible | |
3863 | characters following a newline part of the wrong glyph row, which | |
3864 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 3865 | |
cafafe0b GM |
3866 | static int |
3867 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 3868 | struct it *it; |
cafafe0b | 3869 | int *skipped_p; |
5f5c8ee5 | 3870 | { |
54918e2b | 3871 | int old_selective, newline_found_p, n; |
cafafe0b GM |
3872 | const int MAX_NEWLINE_DISTANCE = 500; |
3873 | ||
0fd37545 GM |
3874 | /* If already on a newline, just consume it to avoid unintended |
3875 | skipping over invisible text below. */ | |
51695746 GM |
3876 | if (it->what == IT_CHARACTER |
3877 | && it->c == '\n' | |
3878 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
3879 | { |
3880 | set_iterator_to_next (it, 0); | |
a77dc1ec | 3881 | it->c = 0; |
0fd37545 GM |
3882 | return 1; |
3883 | } | |
3884 | ||
54918e2b | 3885 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
3886 | unnecessary because it's done by the caller, and (b) leads to an |
3887 | infinite recursion because next_element_from_ellipsis indirectly | |
3888 | calls this function. */ | |
54918e2b GM |
3889 | old_selective = it->selective; |
3890 | it->selective = 0; | |
3891 | ||
cafafe0b GM |
3892 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
3893 | from buffer text. */ | |
3aec8722 GM |
3894 | for (n = newline_found_p = 0; |
3895 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
3896 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 3897 | { |
8692ca92 | 3898 | if (!get_next_display_element (it)) |
d43be70c | 3899 | return 0; |
d02f1cb8 | 3900 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 3901 | set_iterator_to_next (it, 0); |
cafafe0b GM |
3902 | } |
3903 | ||
3904 | /* If we didn't find a newline near enough, see if we can use a | |
3905 | short-cut. */ | |
db0bb807 | 3906 | if (!newline_found_p) |
cafafe0b GM |
3907 | { |
3908 | int start = IT_CHARPOS (*it); | |
3909 | int limit = find_next_newline_no_quit (start, 1); | |
3910 | Lisp_Object pos; | |
3911 | ||
3912 | xassert (!STRINGP (it->string)); | |
3913 | ||
3914 | /* If there isn't any `display' property in sight, and no | |
3915 | overlays, we can just use the position of the newline in | |
3916 | buffer text. */ | |
3917 | if (it->stop_charpos >= limit | |
3918 | || ((pos = Fnext_single_property_change (make_number (start), | |
3919 | Qdisplay, | |
3920 | Qnil, make_number (limit)), | |
3921 | NILP (pos)) | |
3922 | && next_overlay_change (start) == ZV)) | |
3923 | { | |
3924 | IT_CHARPOS (*it) = limit; | |
3925 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
3926 | *skipped_p = newline_found_p = 1; | |
3927 | } | |
3928 | else | |
3929 | { | |
3930 | while (get_next_display_element (it) | |
3931 | && !newline_found_p) | |
3932 | { | |
3933 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
3934 | set_iterator_to_next (it, 0); | |
3935 | } | |
3936 | } | |
3937 | } | |
3938 | ||
54918e2b | 3939 | it->selective = old_selective; |
cafafe0b | 3940 | return newline_found_p; |
5f5c8ee5 GM |
3941 | } |
3942 | ||
3943 | ||
3944 | /* Set IT's current position to the previous visible line start. Skip | |
3945 | invisible text that is so either due to text properties or due to | |
3946 | selective display. Caution: this does not change IT->current_x and | |
3947 | IT->hpos. */ | |
3948 | ||
3949 | static void | |
3950 | back_to_previous_visible_line_start (it) | |
3951 | struct it *it; | |
3952 | { | |
3953 | int visible_p = 0; | |
3954 | ||
3955 | /* Go back one newline if not on BEGV already. */ | |
3956 | if (IT_CHARPOS (*it) > BEGV) | |
3957 | back_to_previous_line_start (it); | |
3958 | ||
3959 | /* Move over lines that are invisible because of selective display | |
3960 | or text properties. */ | |
3961 | while (IT_CHARPOS (*it) > BEGV | |
3962 | && !visible_p) | |
3963 | { | |
3964 | visible_p = 1; | |
3965 | ||
3966 | /* If selective > 0, then lines indented more than that values | |
3967 | are invisible. */ | |
3968 | if (it->selective > 0 | |
3969 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
a67e162b | 3970 | (double) it->selective)) /* iftc */ |
5f5c8ee5 | 3971 | visible_p = 0; |
2311178e | 3972 | else |
5f5c8ee5 GM |
3973 | { |
3974 | Lisp_Object prop; | |
3975 | ||
6fc556fd KR |
3976 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
3977 | Qinvisible, it->window); | |
5f5c8ee5 GM |
3978 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
3979 | visible_p = 0; | |
3980 | } | |
5f5c8ee5 GM |
3981 | |
3982 | /* Back one more newline if the current one is invisible. */ | |
3983 | if (!visible_p) | |
3984 | back_to_previous_line_start (it); | |
3985 | } | |
3986 | ||
3987 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3988 | xassert (IT_CHARPOS (*it) == BEGV | |
3989 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3990 | CHECK_IT (it); | |
3991 | } | |
3992 | ||
3993 | ||
3994 | /* Reseat iterator IT at the previous visible line start. Skip | |
3995 | invisible text that is so either due to text properties or due to | |
3996 | selective display. At the end, update IT's overlay information, | |
3997 | face information etc. */ | |
3998 | ||
3999 | static void | |
4000 | reseat_at_previous_visible_line_start (it) | |
4001 | struct it *it; | |
4002 | { | |
4003 | back_to_previous_visible_line_start (it); | |
4004 | reseat (it, it->current.pos, 1); | |
4005 | CHECK_IT (it); | |
4006 | } | |
4007 | ||
4008 | ||
4009 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
4010 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
4011 | preceding the line start. Skip over invisible text that is so | |
4012 | because of selective display. Compute faces, overlays etc at the | |
4013 | new position. Note that this function does not skip over text that | |
4014 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
4015 | |
4016 | static void | |
312246d1 | 4017 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 4018 | struct it *it; |
312246d1 | 4019 | int on_newline_p; |
5f5c8ee5 | 4020 | { |
cafafe0b GM |
4021 | int newline_found_p, skipped_p = 0; |
4022 | ||
4023 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
4024 | ||
4025 | /* Skip over lines that are invisible because they are indented | |
4026 | more than the value of IT->selective. */ | |
4027 | if (it->selective > 0) | |
4028 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 4029 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
a67e162b | 4030 | (double) it->selective)) /* iftc */ |
a77dc1ec GM |
4031 | { |
4032 | xassert (FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
4033 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
4034 | } | |
cafafe0b GM |
4035 | |
4036 | /* Position on the newline if that's what's requested. */ | |
4037 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 4038 | { |
cafafe0b | 4039 | if (STRINGP (it->string)) |
5f5c8ee5 | 4040 | { |
cafafe0b GM |
4041 | if (IT_STRING_CHARPOS (*it) > 0) |
4042 | { | |
4043 | --IT_STRING_CHARPOS (*it); | |
4044 | --IT_STRING_BYTEPOS (*it); | |
4045 | } | |
5f5c8ee5 | 4046 | } |
cafafe0b | 4047 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
4048 | { |
4049 | --IT_CHARPOS (*it); | |
cafafe0b GM |
4050 | --IT_BYTEPOS (*it); |
4051 | reseat (it, it->current.pos, 0); | |
312246d1 | 4052 | } |
5f5c8ee5 | 4053 | } |
cafafe0b GM |
4054 | else if (skipped_p) |
4055 | reseat (it, it->current.pos, 0); | |
2311178e | 4056 | |
5f5c8ee5 GM |
4057 | CHECK_IT (it); |
4058 | } | |
4059 | ||
4060 | ||
4061 | \f | |
4062 | /*********************************************************************** | |
4063 | Changing an iterator's position | |
4064 | ***********************************************************************/ | |
4065 | ||
4066 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
4067 | is non-zero, always check for text properties at the new position. | |
4068 | Otherwise, text properties are only looked up if POS >= | |
4069 | IT->check_charpos of a property. */ | |
4070 | ||
4071 | static void | |
4072 | reseat (it, pos, force_p) | |
4073 | struct it *it; | |
4074 | struct text_pos pos; | |
4075 | int force_p; | |
4076 | { | |
4077 | int original_pos = IT_CHARPOS (*it); | |
4078 | ||
4079 | reseat_1 (it, pos, 0); | |
4080 | ||
4081 | /* Determine where to check text properties. Avoid doing it | |
4082 | where possible because text property lookup is very expensive. */ | |
4083 | if (force_p | |
4084 | || CHARPOS (pos) > it->stop_charpos | |
4085 | || CHARPOS (pos) < original_pos) | |
4086 | handle_stop (it); | |
4087 | ||
4088 | CHECK_IT (it); | |
4089 | } | |
4090 | ||
4091 | ||
4092 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
4093 | IT->stop_pos to POS, also. */ | |
4094 | ||
4095 | static void | |
4096 | reseat_1 (it, pos, set_stop_p) | |
4097 | struct it *it; | |
4098 | struct text_pos pos; | |
4099 | int set_stop_p; | |
4100 | { | |
4101 | /* Don't call this function when scanning a C string. */ | |
4102 | xassert (it->s == NULL); | |
4103 | ||
4104 | /* POS must be a reasonable value. */ | |
4105 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
4106 | ||
4107 | it->current.pos = it->position = pos; | |
4108 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 4109 | it->end_charpos = ZV; |
5f5c8ee5 GM |
4110 | it->dpvec = NULL; |
4111 | it->current.dpvec_index = -1; | |
4112 | it->current.overlay_string_index = -1; | |
4113 | IT_STRING_CHARPOS (*it) = -1; | |
4114 | IT_STRING_BYTEPOS (*it) = -1; | |
4115 | it->string = Qnil; | |
4116 | it->method = next_element_from_buffer; | |
06fd3792 | 4117 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 4118 | it->sp = 0; |
4aad61f8 | 4119 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
4120 | |
4121 | if (set_stop_p) | |
4122 | it->stop_charpos = CHARPOS (pos); | |
4123 | } | |
4124 | ||
4125 | ||
4126 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
4127 | If S is non-null, it is a C string to iterate over. Otherwise, | |
4128 | STRING gives a Lisp string to iterate over. | |
2311178e | 4129 | |
5f5c8ee5 GM |
4130 | If PRECISION > 0, don't return more then PRECISION number of |
4131 | characters from the string. | |
4132 | ||
4133 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
4134 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
4135 | field width. | |
4136 | ||
4137 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
4138 | MULTIBYTE > 0 means enable it, | |
4139 | MULTIBYTE < 0 means use IT->multibyte_p. | |
4140 | ||
4141 | IT must be initialized via a prior call to init_iterator before | |
4142 | calling this function. */ | |
4143 | ||
4144 | static void | |
4145 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
4146 | struct it *it; | |
4147 | unsigned char *s; | |
4148 | Lisp_Object string; | |
4149 | int charpos; | |
4150 | int precision, field_width, multibyte; | |
4151 | { | |
4152 | /* No region in strings. */ | |
4153 | it->region_beg_charpos = it->region_end_charpos = -1; | |
4154 | ||
4155 | /* No text property checks performed by default, but see below. */ | |
4156 | it->stop_charpos = -1; | |
4157 | ||
4158 | /* Set iterator position and end position. */ | |
4159 | bzero (&it->current, sizeof it->current); | |
4160 | it->current.overlay_string_index = -1; | |
4161 | it->current.dpvec_index = -1; | |
5f5c8ee5 | 4162 | xassert (charpos >= 0); |
2311178e | 4163 | |
e719f5ae GM |
4164 | /* If STRING is specified, use its multibyteness, otherwise use the |
4165 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 4166 | if (multibyte >= 0) |
5f5c8ee5 | 4167 | it->multibyte_p = multibyte > 0; |
2311178e | 4168 | |
5f5c8ee5 GM |
4169 | if (s == NULL) |
4170 | { | |
4171 | xassert (STRINGP (string)); | |
4172 | it->string = string; | |
4173 | it->s = NULL; | |
2051c264 | 4174 | it->end_charpos = it->string_nchars = SCHARS (string); |
5f5c8ee5 GM |
4175 | it->method = next_element_from_string; |
4176 | it->current.string_pos = string_pos (charpos, string); | |
4177 | } | |
4178 | else | |
4179 | { | |
4180 | it->s = s; | |
4181 | it->string = Qnil; | |
4182 | ||
4183 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
4184 | for displaying C strings. */ | |
4185 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
4186 | if (it->multibyte_p) | |
4187 | { | |
4188 | it->current.pos = c_string_pos (charpos, s, 1); | |
4189 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
4190 | } | |
4191 | else | |
4192 | { | |
4193 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
4194 | it->end_charpos = it->string_nchars = strlen (s); | |
4195 | } | |
2311178e | 4196 | |
5f5c8ee5 GM |
4197 | it->method = next_element_from_c_string; |
4198 | } | |
4199 | ||
4200 | /* PRECISION > 0 means don't return more than PRECISION characters | |
4201 | from the string. */ | |
4202 | if (precision > 0 && it->end_charpos - charpos > precision) | |
4203 | it->end_charpos = it->string_nchars = charpos + precision; | |
4204 | ||
4205 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
4206 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
4207 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
4208 | padding with `-' at the end of a mode line. */ | |
4209 | if (field_width < 0) | |
4210 | field_width = INFINITY; | |
4211 | if (field_width > it->end_charpos - charpos) | |
4212 | it->end_charpos = charpos + field_width; | |
4213 | ||
4214 | /* Use the standard display table for displaying strings. */ | |
4215 | if (DISP_TABLE_P (Vstandard_display_table)) | |
4216 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
4217 | ||
4218 | it->stop_charpos = charpos; | |
4219 | CHECK_IT (it); | |
4220 | } | |
4221 | ||
4222 | ||
4223 | \f | |
4224 | /*********************************************************************** | |
4225 | Iteration | |
4226 | ***********************************************************************/ | |
4227 | ||
4228 | /* Load IT's display element fields with information about the next | |
4229 | display element from the current position of IT. Value is zero if | |
4230 | end of buffer (or C string) is reached. */ | |
4231 | ||
4232 | int | |
4233 | get_next_display_element (it) | |
4234 | struct it *it; | |
4235 | { | |
7d0393cf | 4236 | /* Non-zero means that we found a display element. Zero means that |
5f5c8ee5 GM |
4237 | we hit the end of what we iterate over. Performance note: the |
4238 | function pointer `method' used here turns out to be faster than | |
4239 | using a sequence of if-statements. */ | |
4240 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
4241 | |
4242 | if (it->what == IT_CHARACTER) | |
4243 | { | |
4244 | /* Map via display table or translate control characters. | |
4245 | IT->c, IT->len etc. have been set to the next character by | |
4246 | the function call above. If we have a display table, and it | |
4247 | contains an entry for IT->c, translate it. Don't do this if | |
4248 | IT->c itself comes from a display table, otherwise we could | |
4249 | end up in an infinite recursion. (An alternative could be to | |
4250 | count the recursion depth of this function and signal an | |
4251 | error when a certain maximum depth is reached.) Is it worth | |
4252 | it? */ | |
4253 | if (success_p && it->dpvec == NULL) | |
4254 | { | |
4255 | Lisp_Object dv; | |
4256 | ||
4257 | if (it->dp | |
4258 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
4259 | VECTORP (dv))) | |
4260 | { | |
4261 | struct Lisp_Vector *v = XVECTOR (dv); | |
4262 | ||
4263 | /* Return the first character from the display table | |
4264 | entry, if not empty. If empty, don't display the | |
4265 | current character. */ | |
4266 | if (v->size) | |
4267 | { | |
4268 | it->dpvec_char_len = it->len; | |
4269 | it->dpvec = v->contents; | |
4270 | it->dpend = v->contents + v->size; | |
4271 | it->current.dpvec_index = 0; | |
4272 | it->method = next_element_from_display_vector; | |
7eee47cc GM |
4273 | success_p = get_next_display_element (it); |
4274 | } | |
4275 | else | |
4276 | { | |
4277 | set_iterator_to_next (it, 0); | |
4278 | success_p = get_next_display_element (it); | |
5f5c8ee5 | 4279 | } |
5f5c8ee5 GM |
4280 | } |
4281 | ||
4282 | /* Translate control characters into `\003' or `^C' form. | |
4283 | Control characters coming from a display table entry are | |
4284 | currently not translated because we use IT->dpvec to hold | |
4285 | the translation. This could easily be changed but I | |
197516c2 KH |
4286 | don't believe that it is worth doing. |
4287 | ||
fa831cf8 KH |
4288 | If it->multibyte_p is nonzero, eight-bit characters and |
4289 | non-printable multibyte characters are also translated to | |
4290 | octal form. | |
4291 | ||
4292 | If it->multibyte_p is zero, eight-bit characters that | |
4293 | don't have corresponding multibyte char code are also | |
4294 | translated to octal form. */ | |
ba197fe6 | 4295 | else if ((it->c < ' ' |
5f5c8ee5 | 4296 | && (it->area != TEXT_AREA |
c6e89d6c | 4297 | || (it->c != '\n' && it->c != '\t'))) |
fa831cf8 KH |
4298 | || (it->multibyte_p |
4299 | ? ((it->c >= 127 | |
4300 | && it->len == 1) | |
4301 | || !CHAR_PRINTABLE_P (it->c)) | |
ba197fe6 | 4302 | : (it->c >= 127 |
fa831cf8 | 4303 | && it->c == unibyte_char_to_multibyte (it->c)))) |
5f5c8ee5 GM |
4304 | { |
4305 | /* IT->c is a control character which must be displayed | |
4306 | either as '\003' or as `^C' where the '\\' and '^' | |
4307 | can be defined in the display table. Fill | |
4308 | IT->ctl_chars with glyphs for what we have to | |
4309 | display. Then, set IT->dpvec to these glyphs. */ | |
4310 | GLYPH g; | |
4311 | ||
54c85a23 | 4312 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
4313 | { |
4314 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
4315 | if (it->dp | |
4316 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
4317 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
4318 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
4319 | else | |
4320 | g = FAST_MAKE_GLYPH ('^', 0); | |
4321 | XSETINT (it->ctl_chars[0], g); | |
4322 | ||
4323 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
4324 | XSETINT (it->ctl_chars[1], g); | |
4325 | ||
4326 | /* Set up IT->dpvec and return first character from it. */ | |
4327 | it->dpvec_char_len = it->len; | |
4328 | it->dpvec = it->ctl_chars; | |
4329 | it->dpend = it->dpvec + 2; | |
4330 | it->current.dpvec_index = 0; | |
4331 | it->method = next_element_from_display_vector; | |
4332 | get_next_display_element (it); | |
4333 | } | |
4334 | else | |
4335 | { | |
260a86a0 | 4336 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 4337 | int len; |
197516c2 KH |
4338 | int i; |
4339 | GLYPH escape_glyph; | |
4340 | ||
5f5c8ee5 GM |
4341 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
4342 | if (it->dp | |
4343 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
4344 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 4345 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 4346 | else |
197516c2 KH |
4347 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
4348 | ||
c5924f47 KH |
4349 | if (SINGLE_BYTE_CHAR_P (it->c)) |
4350 | str[0] = it->c, len = 1; | |
4351 | else | |
ea9dd091 GM |
4352 | { |
4353 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
4354 | if (len < 0) | |
4355 | { | |
4356 | /* It's an invalid character, which | |
4357 | shouldn't happen actually, but due to | |
4358 | bugs it may happen. Let's print the char | |
4359 | as is, there's not much meaningful we can | |
4360 | do with it. */ | |
4361 | str[0] = it->c; | |
4362 | str[1] = it->c >> 8; | |
4363 | str[2] = it->c >> 16; | |
4364 | str[3] = it->c >> 24; | |
4365 | len = 4; | |
4366 | } | |
4367 | } | |
c5924f47 | 4368 | |
197516c2 KH |
4369 | for (i = 0; i < len; i++) |
4370 | { | |
4371 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
4372 | /* Insert three more glyphs into IT->ctl_chars for | |
4373 | the octal display of the character. */ | |
2311178e | 4374 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); |
197516c2 | 4375 | XSETINT (it->ctl_chars[i * 4 + 1], g); |
2311178e | 4376 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); |
197516c2 | 4377 | XSETINT (it->ctl_chars[i * 4 + 2], g); |
2311178e | 4378 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); |
197516c2 KH |
4379 | XSETINT (it->ctl_chars[i * 4 + 3], g); |
4380 | } | |
5f5c8ee5 GM |
4381 | |
4382 | /* Set up IT->dpvec and return the first character | |
4383 | from it. */ | |
4384 | it->dpvec_char_len = it->len; | |
4385 | it->dpvec = it->ctl_chars; | |
197516c2 | 4386 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
4387 | it->current.dpvec_index = 0; |
4388 | it->method = next_element_from_display_vector; | |
4389 | get_next_display_element (it); | |
4390 | } | |
4391 | } | |
4392 | } | |
4393 | ||
980806b6 KH |
4394 | /* Adjust face id for a multibyte character. There are no |
4395 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
4396 | if (it->multibyte_p |
4397 | && success_p | |
980806b6 | 4398 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 4399 | { |
980806b6 KH |
4400 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
4401 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
4402 | } |
4403 | } | |
4404 | ||
4405 | /* Is this character the last one of a run of characters with | |
4406 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
4407 | if (it->face_box_p | |
4408 | && it->s == NULL) | |
4409 | { | |
4410 | int face_id; | |
4411 | struct face *face; | |
4412 | ||
4413 | it->end_of_box_run_p | |
4414 | = ((face_id = face_after_it_pos (it), | |
4415 | face_id != it->face_id) | |
4416 | && (face = FACE_FROM_ID (it->f, face_id), | |
4417 | face->box == FACE_NO_BOX)); | |
4418 | } | |
4419 | ||
4420 | /* Value is 0 if end of buffer or string reached. */ | |
4421 | return success_p; | |
4422 | } | |
4423 | ||
4424 | ||
4425 | /* Move IT to the next display element. | |
4426 | ||
cafafe0b GM |
4427 | RESEAT_P non-zero means if called on a newline in buffer text, |
4428 | skip to the next visible line start. | |
4429 | ||
5f5c8ee5 GM |
4430 | Functions get_next_display_element and set_iterator_to_next are |
4431 | separate because I find this arrangement easier to handle than a | |
4432 | get_next_display_element function that also increments IT's | |
4433 | position. The way it is we can first look at an iterator's current | |
4434 | display element, decide whether it fits on a line, and if it does, | |
4435 | increment the iterator position. The other way around we probably | |
4436 | would either need a flag indicating whether the iterator has to be | |
4437 | incremented the next time, or we would have to implement a | |
4438 | decrement position function which would not be easy to write. */ | |
4439 | ||
4440 | void | |
cafafe0b | 4441 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 4442 | struct it *it; |
cafafe0b | 4443 | int reseat_p; |
5f5c8ee5 | 4444 | { |
483de32b GM |
4445 | /* Reset flags indicating start and end of a sequence of characters |
4446 | with box. Reset them at the start of this function because | |
4447 | moving the iterator to a new position might set them. */ | |
4448 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
2311178e | 4449 | |
5f5c8ee5 GM |
4450 | if (it->method == next_element_from_buffer) |
4451 | { | |
4452 | /* The current display element of IT is a character from | |
4453 | current_buffer. Advance in the buffer, and maybe skip over | |
4454 | invisible lines that are so because of selective display. */ | |
cafafe0b | 4455 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 4456 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4457 | else |
4458 | { | |
4459 | xassert (it->len != 0); | |
4460 | IT_BYTEPOS (*it) += it->len; | |
4461 | IT_CHARPOS (*it) += 1; | |
4462 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
4463 | } | |
4464 | } | |
260a86a0 KH |
4465 | else if (it->method == next_element_from_composition) |
4466 | { | |
4467 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
4468 | if (STRINGP (it->string)) | |
4469 | { | |
4470 | IT_STRING_BYTEPOS (*it) += it->len; | |
4471 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
4472 | it->method = next_element_from_string; | |
4473 | goto consider_string_end; | |
4474 | } | |
4475 | else | |
4476 | { | |
4477 | IT_BYTEPOS (*it) += it->len; | |
4478 | IT_CHARPOS (*it) += it->cmp_len; | |
4479 | it->method = next_element_from_buffer; | |
4480 | } | |
4481 | } | |
5f5c8ee5 GM |
4482 | else if (it->method == next_element_from_c_string) |
4483 | { | |
4484 | /* Current display element of IT is from a C string. */ | |
4485 | IT_BYTEPOS (*it) += it->len; | |
4486 | IT_CHARPOS (*it) += 1; | |
4487 | } | |
4488 | else if (it->method == next_element_from_display_vector) | |
4489 | { | |
4490 | /* Current display element of IT is from a display table entry. | |
4491 | Advance in the display table definition. Reset it to null if | |
4492 | end reached, and continue with characters from buffers/ | |
4493 | strings. */ | |
4494 | ++it->current.dpvec_index; | |
286bcbc9 | 4495 | |
980806b6 KH |
4496 | /* Restore face of the iterator to what they were before the |
4497 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 4498 | it->face_id = it->saved_face_id; |
2311178e | 4499 | |
5f5c8ee5 GM |
4500 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
4501 | { | |
4502 | if (it->s) | |
4503 | it->method = next_element_from_c_string; | |
4504 | else if (STRINGP (it->string)) | |
4505 | it->method = next_element_from_string; | |
4506 | else | |
4507 | it->method = next_element_from_buffer; | |
4508 | ||
4509 | it->dpvec = NULL; | |
4510 | it->current.dpvec_index = -1; | |
4511 | ||
312246d1 GM |
4512 | /* Skip over characters which were displayed via IT->dpvec. */ |
4513 | if (it->dpvec_char_len < 0) | |
4514 | reseat_at_next_visible_line_start (it, 1); | |
4515 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
4516 | { |
4517 | it->len = it->dpvec_char_len; | |
cafafe0b | 4518 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 GM |
4519 | } |
4520 | } | |
4521 | } | |
4522 | else if (it->method == next_element_from_string) | |
4523 | { | |
4524 | /* Current display element is a character from a Lisp string. */ | |
4525 | xassert (it->s == NULL && STRINGP (it->string)); | |
4526 | IT_STRING_BYTEPOS (*it) += it->len; | |
4527 | IT_STRING_CHARPOS (*it) += 1; | |
2311178e | 4528 | |
5f5c8ee5 GM |
4529 | consider_string_end: |
4530 | ||
4531 | if (it->current.overlay_string_index >= 0) | |
4532 | { | |
4533 | /* IT->string is an overlay string. Advance to the | |
4534 | next, if there is one. */ | |
2051c264 | 4535 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4536 | next_overlay_string (it); |
4537 | } | |
4538 | else | |
4539 | { | |
4540 | /* IT->string is not an overlay string. If we reached | |
4541 | its end, and there is something on IT->stack, proceed | |
4542 | with what is on the stack. This can be either another | |
4543 | string, this time an overlay string, or a buffer. */ | |
2051c264 | 4544 | if (IT_STRING_CHARPOS (*it) == SCHARS (it->string) |
5f5c8ee5 GM |
4545 | && it->sp > 0) |
4546 | { | |
4547 | pop_it (it); | |
4548 | if (!STRINGP (it->string)) | |
4549 | it->method = next_element_from_buffer; | |
b2046df8 GM |
4550 | else |
4551 | goto consider_string_end; | |
5f5c8ee5 GM |
4552 | } |
4553 | } | |
4554 | } | |
4555 | else if (it->method == next_element_from_image | |
4556 | || it->method == next_element_from_stretch) | |
4557 | { | |
4558 | /* The position etc with which we have to proceed are on | |
4559 | the stack. The position may be at the end of a string, | |
4560 | if the `display' property takes up the whole string. */ | |
4561 | pop_it (it); | |
4562 | it->image_id = 0; | |
4563 | if (STRINGP (it->string)) | |
4564 | { | |
4565 | it->method = next_element_from_string; | |
4566 | goto consider_string_end; | |
4567 | } | |
4568 | else | |
4569 | it->method = next_element_from_buffer; | |
4570 | } | |
4571 | else | |
4572 | /* There are no other methods defined, so this should be a bug. */ | |
4573 | abort (); | |
4574 | ||
5f5c8ee5 GM |
4575 | xassert (it->method != next_element_from_string |
4576 | || (STRINGP (it->string) | |
4577 | && IT_STRING_CHARPOS (*it) >= 0)); | |
4578 | } | |
4579 | ||
4580 | ||
4581 | /* Load IT's display element fields with information about the next | |
4582 | display element which comes from a display table entry or from the | |
4583 | result of translating a control character to one of the forms `^C' | |
4584 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
4585 | ||
4586 | static int | |
4587 | next_element_from_display_vector (it) | |
4588 | struct it *it; | |
4589 | { | |
4590 | /* Precondition. */ | |
4591 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
4592 | ||
4593 | /* Remember the current face id in case glyphs specify faces. | |
4594 | IT's face is restored in set_iterator_to_next. */ | |
4595 | it->saved_face_id = it->face_id; | |
2311178e | 4596 | |
5f5c8ee5 GM |
4597 | if (INTEGERP (*it->dpvec) |
4598 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
4599 | { | |
4600 | int lface_id; | |
4601 | GLYPH g; | |
4602 | ||
4603 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
4604 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 4605 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
4606 | |
4607 | /* The entry may contain a face id to use. Such a face id is | |
4608 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 4609 | zero means no face is specified. */ |
5f5c8ee5 GM |
4610 | lface_id = FAST_GLYPH_FACE (g); |
4611 | if (lface_id) | |
4612 | { | |
969065c3 | 4613 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
4614 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
4615 | if (face_id >= 0) | |
969065c3 | 4616 | it->face_id = face_id; |
5f5c8ee5 GM |
4617 | } |
4618 | } | |
4619 | else | |
4620 | /* Display table entry is invalid. Return a space. */ | |
4621 | it->c = ' ', it->len = 1; | |
4622 | ||
4623 | /* Don't change position and object of the iterator here. They are | |
4624 | still the values of the character that had this display table | |
4625 | entry or was translated, and that's what we want. */ | |
4626 | it->what = IT_CHARACTER; | |
4627 | return 1; | |
4628 | } | |
4629 | ||
4630 | ||
4631 | /* Load IT with the next display element from Lisp string IT->string. | |
4632 | IT->current.string_pos is the current position within the string. | |
4633 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
4634 | overlay string. */ | |
4635 | ||
4636 | static int | |
4637 | next_element_from_string (it) | |
4638 | struct it *it; | |
4639 | { | |
4640 | struct text_pos position; | |
4641 | ||
4642 | xassert (STRINGP (it->string)); | |
4643 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
4644 | position = it->current.string_pos; | |
4645 | ||
4646 | /* Time to check for invisible text? */ | |
4647 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
4648 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
4649 | { | |
4650 | handle_stop (it); | |
4651 | ||
4652 | /* Since a handler may have changed IT->method, we must | |
4653 | recurse here. */ | |
4654 | return get_next_display_element (it); | |
4655 | } | |
4656 | ||
4657 | if (it->current.overlay_string_index >= 0) | |
4658 | { | |
4659 | /* Get the next character from an overlay string. In overlay | |
4660 | strings, There is no field width or padding with spaces to | |
4661 | do. */ | |
2051c264 | 4662 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4663 | { |
4664 | it->what = IT_EOB; | |
4665 | return 0; | |
4666 | } | |
4667 | else if (STRING_MULTIBYTE (it->string)) | |
4668 | { | |
2051c264 | 4669 | int remaining = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
4670 | const unsigned char *s = (SDATA (it->string) |
4671 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4672 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
4673 | } |
4674 | else | |
4675 | { | |
2051c264 | 4676 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
4677 | it->len = 1; |
4678 | } | |
4679 | } | |
4680 | else | |
4681 | { | |
4682 | /* Get the next character from a Lisp string that is not an | |
4683 | overlay string. Such strings come from the mode line, for | |
4684 | example. We may have to pad with spaces, or truncate the | |
4685 | string. See also next_element_from_c_string. */ | |
4686 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
4687 | { | |
4688 | it->what = IT_EOB; | |
4689 | return 0; | |
4690 | } | |
4691 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
4692 | { | |
4693 | /* Pad with spaces. */ | |
4694 | it->c = ' ', it->len = 1; | |
4695 | CHARPOS (position) = BYTEPOS (position) = -1; | |
4696 | } | |
4697 | else if (STRING_MULTIBYTE (it->string)) | |
4698 | { | |
2051c264 | 4699 | int maxlen = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
50f80c2f KR |
4700 | const unsigned char *s = (SDATA (it->string) |
4701 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4702 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
4703 | } |
4704 | else | |
4705 | { | |
2051c264 | 4706 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
4707 | it->len = 1; |
4708 | } | |
4709 | } | |
4710 | ||
4711 | /* Record what we have and where it came from. Note that we store a | |
4712 | buffer position in IT->position although it could arguably be a | |
4713 | string position. */ | |
4714 | it->what = IT_CHARACTER; | |
4715 | it->object = it->string; | |
4716 | it->position = position; | |
4717 | return 1; | |
4718 | } | |
4719 | ||
4720 | ||
4721 | /* Load IT with next display element from C string IT->s. | |
4722 | IT->string_nchars is the maximum number of characters to return | |
4723 | from the string. IT->end_charpos may be greater than | |
4724 | IT->string_nchars when this function is called, in which case we | |
4725 | may have to return padding spaces. Value is zero if end of string | |
4726 | reached, including padding spaces. */ | |
4727 | ||
4728 | static int | |
4729 | next_element_from_c_string (it) | |
4730 | struct it *it; | |
4731 | { | |
4732 | int success_p = 1; | |
2311178e | 4733 | |
5f5c8ee5 GM |
4734 | xassert (it->s); |
4735 | it->what = IT_CHARACTER; | |
4736 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
4737 | it->object = Qnil; | |
2311178e | 4738 | |
5f5c8ee5 GM |
4739 | /* IT's position can be greater IT->string_nchars in case a field |
4740 | width or precision has been specified when the iterator was | |
4741 | initialized. */ | |
4742 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4743 | { | |
4744 | /* End of the game. */ | |
4745 | it->what = IT_EOB; | |
4746 | success_p = 0; | |
4747 | } | |
4748 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
4749 | { | |
4750 | /* Pad with spaces. */ | |
4751 | it->c = ' ', it->len = 1; | |
4752 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
4753 | } | |
4754 | else if (it->multibyte_p) | |
4755 | { | |
4756 | /* Implementation note: The calls to strlen apparently aren't a | |
4757 | performance problem because there is no noticeable performance | |
4758 | difference between Emacs running in unibyte or multibyte mode. */ | |
4759 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
4760 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
4761 | maxlen, &it->len); | |
5f5c8ee5 GM |
4762 | } |
4763 | else | |
4764 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
2311178e | 4765 | |
5f5c8ee5 GM |
4766 | return success_p; |
4767 | } | |
4768 | ||
4769 | ||
4770 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
4771 | The definition of the ellipsis glyphs may come from a display table | |
4772 | entry. This function Fills IT with the first glyph from the | |
4773 | ellipsis if an ellipsis is to be displayed. */ | |
4774 | ||
13f19968 | 4775 | static int |
5f5c8ee5 GM |
4776 | next_element_from_ellipsis (it) |
4777 | struct it *it; | |
4778 | { | |
13f19968 | 4779 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 4780 | { |
13f19968 GM |
4781 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
4782 | { | |
4783 | /* Use the display table definition for `...'. Invalid glyphs | |
4784 | will be handled by the method returning elements from dpvec. */ | |
4785 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
4786 | it->dpvec_char_len = it->len; | |
4787 | it->dpvec = v->contents; | |
4788 | it->dpend = v->contents + v->size; | |
4789 | it->current.dpvec_index = 0; | |
4790 | it->method = next_element_from_display_vector; | |
4791 | } | |
4792 | else | |
4793 | { | |
4794 | /* Use default `...' which is stored in default_invis_vector. */ | |
4795 | it->dpvec_char_len = it->len; | |
4796 | it->dpvec = default_invis_vector; | |
4797 | it->dpend = default_invis_vector + 3; | |
4798 | it->current.dpvec_index = 0; | |
4799 | it->method = next_element_from_display_vector; | |
4800 | } | |
5f5c8ee5 | 4801 | } |
13f19968 | 4802 | else |
54918e2b | 4803 | { |
4aad61f8 GM |
4804 | /* The face at the current position may be different from the |
4805 | face we find after the invisible text. Remember what it | |
4806 | was in IT->saved_face_id, and signal that it's there by | |
4807 | setting face_before_selective_p. */ | |
4808 | it->saved_face_id = it->face_id; | |
54918e2b GM |
4809 | it->method = next_element_from_buffer; |
4810 | reseat_at_next_visible_line_start (it, 1); | |
4aad61f8 | 4811 | it->face_before_selective_p = 1; |
54918e2b | 4812 | } |
2311178e | 4813 | |
13f19968 | 4814 | return get_next_display_element (it); |
5f5c8ee5 GM |
4815 | } |
4816 | ||
4817 | ||
4818 | /* Deliver an image display element. The iterator IT is already | |
4819 | filled with image information (done in handle_display_prop). Value | |
4820 | is always 1. */ | |
2311178e | 4821 | |
5f5c8ee5 GM |
4822 | |
4823 | static int | |
4824 | next_element_from_image (it) | |
4825 | struct it *it; | |
4826 | { | |
4827 | it->what = IT_IMAGE; | |
4828 | return 1; | |
4829 | } | |
4830 | ||
4831 | ||
4832 | /* Fill iterator IT with next display element from a stretch glyph | |
4833 | property. IT->object is the value of the text property. Value is | |
4834 | always 1. */ | |
4835 | ||
4836 | static int | |
4837 | next_element_from_stretch (it) | |
4838 | struct it *it; | |
4839 | { | |
4840 | it->what = IT_STRETCH; | |
4841 | return 1; | |
4842 | } | |
4843 | ||
4844 | ||
4845 | /* Load IT with the next display element from current_buffer. Value | |
4846 | is zero if end of buffer reached. IT->stop_charpos is the next | |
4847 | position at which to stop and check for text properties or buffer | |
4848 | end. */ | |
4849 | ||
4850 | static int | |
4851 | next_element_from_buffer (it) | |
4852 | struct it *it; | |
4853 | { | |
4854 | int success_p = 1; | |
4855 | ||
4856 | /* Check this assumption, otherwise, we would never enter the | |
4857 | if-statement, below. */ | |
4858 | xassert (IT_CHARPOS (*it) >= BEGV | |
4859 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
4860 | ||
4861 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
4862 | { | |
4863 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4864 | { | |
4865 | int overlay_strings_follow_p; | |
2311178e | 4866 | |
5f5c8ee5 GM |
4867 | /* End of the game, except when overlay strings follow that |
4868 | haven't been returned yet. */ | |
4869 | if (it->overlay_strings_at_end_processed_p) | |
4870 | overlay_strings_follow_p = 0; | |
4871 | else | |
4872 | { | |
4873 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 4874 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
4875 | } |
4876 | ||
4877 | if (overlay_strings_follow_p) | |
4878 | success_p = get_next_display_element (it); | |
4879 | else | |
4880 | { | |
4881 | it->what = IT_EOB; | |
4882 | it->position = it->current.pos; | |
4883 | success_p = 0; | |
4884 | } | |
4885 | } | |
4886 | else | |
4887 | { | |
4888 | handle_stop (it); | |
4889 | return get_next_display_element (it); | |
4890 | } | |
4891 | } | |
4892 | else | |
4893 | { | |
4894 | /* No face changes, overlays etc. in sight, so just return a | |
4895 | character from current_buffer. */ | |
4896 | unsigned char *p; | |
4897 | ||
4898 | /* Maybe run the redisplay end trigger hook. Performance note: | |
4899 | This doesn't seem to cost measurable time. */ | |
4900 | if (it->redisplay_end_trigger_charpos | |
4901 | && it->glyph_row | |
4902 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
4903 | run_redisplay_end_trigger_hook (it); | |
4904 | ||
4905 | /* Get the next character, maybe multibyte. */ | |
4906 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 4907 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
4908 | { |
4909 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
4910 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 4911 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
4912 | } |
4913 | else | |
4914 | it->c = *p, it->len = 1; | |
4915 | ||
4916 | /* Record what we have and where it came from. */ | |
4917 | it->what = IT_CHARACTER;; | |
4918 | it->object = it->w->buffer; | |
4919 | it->position = it->current.pos; | |
4920 | ||
4921 | /* Normally we return the character found above, except when we | |
4922 | really want to return an ellipsis for selective display. */ | |
4923 | if (it->selective) | |
4924 | { | |
4925 | if (it->c == '\n') | |
4926 | { | |
4927 | /* A value of selective > 0 means hide lines indented more | |
4928 | than that number of columns. */ | |
4929 | if (it->selective > 0 | |
4930 | && IT_CHARPOS (*it) + 1 < ZV | |
4931 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
4932 | IT_BYTEPOS (*it) + 1, | |
a67e162b | 4933 | (double) it->selective)) /* iftc */ |
312246d1 | 4934 | { |
13f19968 | 4935 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
4936 | it->dpvec_char_len = -1; |
4937 | } | |
5f5c8ee5 GM |
4938 | } |
4939 | else if (it->c == '\r' && it->selective == -1) | |
4940 | { | |
4941 | /* A value of selective == -1 means that everything from the | |
4942 | CR to the end of the line is invisible, with maybe an | |
4943 | ellipsis displayed for it. */ | |
13f19968 | 4944 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4945 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4946 | } |
4947 | } | |
4948 | } | |
4949 | ||
4950 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4951 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4952 | return success_p; |
4953 | } | |
4954 | ||
2311178e | 4955 | |
5f5c8ee5 GM |
4956 | /* Run the redisplay end trigger hook for IT. */ |
4957 | ||
4958 | static void | |
4959 | run_redisplay_end_trigger_hook (it) | |
4960 | struct it *it; | |
4961 | { | |
4962 | Lisp_Object args[3]; | |
4963 | ||
4964 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4965 | displaying something, or otherwise we should not run the hook. */ | |
4966 | xassert (it->glyph_row); | |
4967 | ||
4968 | /* Set up hook arguments. */ | |
4969 | args[0] = Qredisplay_end_trigger_functions; | |
4970 | args[1] = it->window; | |
4971 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4972 | it->redisplay_end_trigger_charpos = 0; | |
4973 | ||
4974 | /* Since we are *trying* to run these functions, don't try to run | |
4975 | them again, even if they get an error. */ | |
4976 | it->w->redisplay_end_trigger = Qnil; | |
4977 | Frun_hook_with_args (3, args); | |
2311178e | 4978 | |
5f5c8ee5 GM |
4979 | /* Notice if it changed the face of the character we are on. */ |
4980 | handle_face_prop (it); | |
4981 | } | |
4982 | ||
4983 | ||
260a86a0 KH |
4984 | /* Deliver a composition display element. The iterator IT is already |
4985 | filled with composition information (done in | |
4986 | handle_composition_prop). Value is always 1. */ | |
4987 | ||
4988 | static int | |
4989 | next_element_from_composition (it) | |
4990 | struct it *it; | |
4991 | { | |
4992 | it->what = IT_COMPOSITION; | |
4993 | it->position = (STRINGP (it->string) | |
4994 | ? it->current.string_pos | |
4995 | : it->current.pos); | |
4996 | return 1; | |
4997 | } | |
4998 | ||
4999 | ||
5f5c8ee5 GM |
5000 | \f |
5001 | /*********************************************************************** | |
5002 | Moving an iterator without producing glyphs | |
5003 | ***********************************************************************/ | |
5004 | ||
5005 | /* Move iterator IT to a specified buffer or X position within one | |
5006 | line on the display without producing glyphs. | |
5007 | ||
c53a1624 RS |
5008 | OP should be a bit mask including some or all of these bits: |
5009 | MOVE_TO_X: Stop on reaching x-position TO_X. | |
5010 | MOVE_TO_POS: Stop on reaching buffer or string position TO_CHARPOS. | |
5011 | Regardless of OP's value, stop in reaching the end of the display line. | |
5f5c8ee5 | 5012 | |
c53a1624 RS |
5013 | TO_X is normally a value 0 <= TO_X <= IT->last_visible_x. |
5014 | This means, in particular, that TO_X includes window's horizontal | |
5015 | scroll amount. | |
5f5c8ee5 | 5016 | |
c53a1624 RS |
5017 | The return value has several possible values that |
5018 | say what condition caused the scan to stop: | |
5f5c8ee5 GM |
5019 | |
5020 | MOVE_POS_MATCH_OR_ZV | |
5021 | - when TO_POS or ZV was reached. | |
2311178e | 5022 | |
5f5c8ee5 GM |
5023 | MOVE_X_REACHED |
5024 | -when TO_X was reached before TO_POS or ZV were reached. | |
2311178e | 5025 | |
5f5c8ee5 GM |
5026 | MOVE_LINE_CONTINUED |
5027 | - when we reached the end of the display area and the line must | |
5028 | be continued. | |
2311178e | 5029 | |
5f5c8ee5 GM |
5030 | MOVE_LINE_TRUNCATED |
5031 | - when we reached the end of the display area and the line is | |
5032 | truncated. | |
5033 | ||
5034 | MOVE_NEWLINE_OR_CR | |
5035 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
5036 | display is on. */ | |
5037 | ||
701552dd | 5038 | static enum move_it_result |
5f5c8ee5 GM |
5039 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
5040 | struct it *it; | |
5041 | int to_charpos, to_x, op; | |
5042 | { | |
5043 | enum move_it_result result = MOVE_UNDEFINED; | |
5044 | struct glyph_row *saved_glyph_row; | |
5045 | ||
5046 | /* Don't produce glyphs in produce_glyphs. */ | |
5047 | saved_glyph_row = it->glyph_row; | |
5048 | it->glyph_row = NULL; | |
5049 | ||
5f5c8ee5 GM |
5050 | while (1) |
5051 | { | |
ae26e27d | 5052 | int x, i, ascent = 0, descent = 0; |
2311178e | 5053 | |
5f5c8ee5 GM |
5054 | /* Stop when ZV or TO_CHARPOS reached. */ |
5055 | if (!get_next_display_element (it) | |
5056 | || ((op & MOVE_TO_POS) != 0 | |
5057 | && BUFFERP (it->object) | |
5058 | && IT_CHARPOS (*it) >= to_charpos)) | |
5059 | { | |
5060 | result = MOVE_POS_MATCH_OR_ZV; | |
5061 | break; | |
5062 | } | |
2311178e | 5063 | |
5f5c8ee5 GM |
5064 | /* The call to produce_glyphs will get the metrics of the |
5065 | display element IT is loaded with. We record in x the | |
5066 | x-position before this display element in case it does not | |
5067 | fit on the line. */ | |
5068 | x = it->current_x; | |
2311178e | 5069 | |
47589c8c GM |
5070 | /* Remember the line height so far in case the next element doesn't |
5071 | fit on the line. */ | |
5072 | if (!it->truncate_lines_p) | |
5073 | { | |
5074 | ascent = it->max_ascent; | |
5075 | descent = it->max_descent; | |
5076 | } | |
2311178e | 5077 | |
5f5c8ee5 GM |
5078 | PRODUCE_GLYPHS (it); |
5079 | ||
5080 | if (it->area != TEXT_AREA) | |
5081 | { | |
cafafe0b | 5082 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5083 | continue; |
5084 | } | |
5085 | ||
5086 | /* The number of glyphs we get back in IT->nglyphs will normally | |
5087 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
5088 | character on a terminal frame, or (iii) a line end. For the | |
5089 | second case, IT->nglyphs - 1 padding glyphs will be present | |
5090 | (on X frames, there is only one glyph produced for a | |
5091 | composite character. | |
5092 | ||
5093 | The behavior implemented below means, for continuation lines, | |
5094 | that as many spaces of a TAB as fit on the current line are | |
5095 | displayed there. For terminal frames, as many glyphs of a | |
5096 | multi-glyph character are displayed in the current line, too. | |
5097 | This is what the old redisplay code did, and we keep it that | |
5098 | way. Under X, the whole shape of a complex character must | |
5099 | fit on the line or it will be completely displayed in the | |
5100 | next line. | |
5101 | ||
5102 | Note that both for tabs and padding glyphs, all glyphs have | |
5103 | the same width. */ | |
5104 | if (it->nglyphs) | |
5105 | { | |
5106 | /* More than one glyph or glyph doesn't fit on line. All | |
5107 | glyphs have the same width. */ | |
5108 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
5109 | int new_x; | |
2311178e | 5110 | |
5f5c8ee5 GM |
5111 | for (i = 0; i < it->nglyphs; ++i, x = new_x) |
5112 | { | |
5113 | new_x = x + single_glyph_width; | |
5114 | ||
5115 | /* We want to leave anything reaching TO_X to the caller. */ | |
5116 | if ((op & MOVE_TO_X) && new_x > to_x) | |
5117 | { | |
5118 | it->current_x = x; | |
5119 | result = MOVE_X_REACHED; | |
5120 | break; | |
5121 | } | |
5122 | else if (/* Lines are continued. */ | |
5123 | !it->truncate_lines_p | |
5124 | && (/* And glyph doesn't fit on the line. */ | |
5125 | new_x > it->last_visible_x | |
5126 | /* Or it fits exactly and we're on a window | |
5127 | system frame. */ | |
5128 | || (new_x == it->last_visible_x | |
5129 | && FRAME_WINDOW_P (it->f)))) | |
5130 | { | |
5131 | if (/* IT->hpos == 0 means the very first glyph | |
5132 | doesn't fit on the line, e.g. a wide image. */ | |
5133 | it->hpos == 0 | |
5134 | || (new_x == it->last_visible_x | |
5135 | && FRAME_WINDOW_P (it->f))) | |
5136 | { | |
5137 | ++it->hpos; | |
5138 | it->current_x = new_x; | |
5139 | if (i == it->nglyphs - 1) | |
cafafe0b | 5140 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5141 | } |
5142 | else | |
47589c8c GM |
5143 | { |
5144 | it->current_x = x; | |
5145 | it->max_ascent = ascent; | |
5146 | it->max_descent = descent; | |
5147 | } | |
2311178e | 5148 | |
47589c8c GM |
5149 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", |
5150 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
5151 | result = MOVE_LINE_CONTINUED; |
5152 | break; | |
5153 | } | |
5154 | else if (new_x > it->first_visible_x) | |
5155 | { | |
5156 | /* Glyph is visible. Increment number of glyphs that | |
5157 | would be displayed. */ | |
5158 | ++it->hpos; | |
5159 | } | |
5160 | else | |
5161 | { | |
2311178e | 5162 | /* Glyph is completely off the left margin of the display |
5f5c8ee5 GM |
5163 | area. Nothing to do. */ |
5164 | } | |
5165 | } | |
5166 | ||
5167 | if (result != MOVE_UNDEFINED) | |
5168 | break; | |
5169 | } | |
5170 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
5171 | { | |
5172 | /* Stop when TO_X specified and reached. This check is | |
5173 | necessary here because of lines consisting of a line end, | |
5174 | only. The line end will not produce any glyphs and we | |
5175 | would never get MOVE_X_REACHED. */ | |
5176 | xassert (it->nglyphs == 0); | |
5177 | result = MOVE_X_REACHED; | |
5178 | break; | |
5179 | } | |
2311178e | 5180 | |
5f5c8ee5 GM |
5181 | /* Is this a line end? If yes, we're done. */ |
5182 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5183 | { | |
5184 | result = MOVE_NEWLINE_OR_CR; | |
5185 | break; | |
5186 | } | |
2311178e | 5187 | |
5f5c8ee5 GM |
5188 | /* The current display element has been consumed. Advance |
5189 | to the next. */ | |
cafafe0b | 5190 | set_iterator_to_next (it, 1); |
2311178e | 5191 | |
5f5c8ee5 GM |
5192 | /* Stop if lines are truncated and IT's current x-position is |
5193 | past the right edge of the window now. */ | |
5194 | if (it->truncate_lines_p | |
5195 | && it->current_x >= it->last_visible_x) | |
5196 | { | |
5197 | result = MOVE_LINE_TRUNCATED; | |
5198 | break; | |
5199 | } | |
5200 | } | |
5201 | ||
5202 | /* Restore the iterator settings altered at the beginning of this | |
5203 | function. */ | |
5204 | it->glyph_row = saved_glyph_row; | |
5205 | return result; | |
5206 | } | |
5207 | ||
5208 | ||
9b2bba76 RS |
5209 | /* Move IT forward until it satisfies one or more of the criteria in |
5210 | TO_CHARPOS, TO_X, TO_Y, and TO_VPOS. | |
5211 | ||
5212 | OP is a bit-mask that specifies where to stop, and in particular, | |
5213 | which of those four position arguments makes a difference. See the | |
5214 | description of enum move_operation_enum. | |
2311178e | 5215 | |
5f5c8ee5 GM |
5216 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a |
5217 | screen line, this function will set IT to the next position > | |
5218 | TO_CHARPOS. */ | |
5219 | ||
5220 | void | |
5221 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
5222 | struct it *it; | |
5223 | int to_charpos, to_x, to_y, to_vpos; | |
5224 | int op; | |
5225 | { | |
5226 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
5227 | int line_height; | |
47589c8c | 5228 | int reached = 0; |
5f5c8ee5 | 5229 | |
47589c8c | 5230 | for (;;) |
5f5c8ee5 GM |
5231 | { |
5232 | if (op & MOVE_TO_VPOS) | |
5233 | { | |
5234 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
5235 | start of the line TO_VPOS. */ | |
5236 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
5237 | { | |
5238 | if (it->vpos == to_vpos) | |
47589c8c GM |
5239 | { |
5240 | reached = 1; | |
5241 | break; | |
5242 | } | |
5243 | else | |
5244 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
5245 | } |
5246 | else | |
5247 | { | |
5248 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
5249 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
5250 | if (it->vpos == to_vpos) |
5251 | { | |
5252 | reached = 2; | |
5253 | break; | |
5254 | } | |
2311178e | 5255 | |
5f5c8ee5 GM |
5256 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
5257 | ||
5258 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
5259 | { |
5260 | reached = 3; | |
5261 | break; | |
5262 | } | |
5f5c8ee5 GM |
5263 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
5264 | { | |
5265 | /* We have reached TO_X but not in the line we want. */ | |
5266 | skip = move_it_in_display_line_to (it, to_charpos, | |
5267 | -1, MOVE_TO_POS); | |
5268 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5269 | { |
5270 | reached = 4; | |
5271 | break; | |
5272 | } | |
5f5c8ee5 GM |
5273 | } |
5274 | } | |
5275 | } | |
5276 | else if (op & MOVE_TO_Y) | |
5277 | { | |
5278 | struct it it_backup; | |
2311178e | 5279 | |
5f5c8ee5 GM |
5280 | /* TO_Y specified means stop at TO_X in the line containing |
5281 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
5282 | problem is that we can't really tell whether the line | |
5283 | contains TO_Y before we have completely scanned it, and | |
5284 | this may skip past TO_X. What we do is to first scan to | |
5285 | TO_X. | |
5286 | ||
5287 | If TO_X is not specified, use a TO_X of zero. The reason | |
5288 | is to make the outcome of this function more predictable. | |
5289 | If we didn't use TO_X == 0, we would stop at the end of | |
5290 | the line which is probably not what a caller would expect | |
5291 | to happen. */ | |
5292 | skip = move_it_in_display_line_to (it, to_charpos, | |
5293 | ((op & MOVE_TO_X) | |
5294 | ? to_x : 0), | |
5295 | (MOVE_TO_X | |
5296 | | (op & MOVE_TO_POS))); | |
5297 | ||
5298 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
5299 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5300 | { |
5301 | reached = 5; | |
5302 | break; | |
5303 | } | |
2311178e | 5304 | |
5f5c8ee5 GM |
5305 | /* If TO_X was reached, we would like to know whether TO_Y |
5306 | is in the line. This can only be said if we know the | |
5307 | total line height which requires us to scan the rest of | |
5308 | the line. */ | |
5f5c8ee5 GM |
5309 | if (skip == MOVE_X_REACHED) |
5310 | { | |
5311 | it_backup = *it; | |
47589c8c | 5312 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5313 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
5314 | op & MOVE_TO_POS); | |
47589c8c | 5315 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5316 | } |
5317 | ||
5318 | /* Now, decide whether TO_Y is in this line. */ | |
5319 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 5320 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
2311178e | 5321 | |
5f5c8ee5 GM |
5322 | if (to_y >= it->current_y |
5323 | && to_y < it->current_y + line_height) | |
5324 | { | |
5325 | if (skip == MOVE_X_REACHED) | |
5326 | /* If TO_Y is in this line and TO_X was reached above, | |
5327 | we scanned too far. We have to restore IT's settings | |
5328 | to the ones before skipping. */ | |
5329 | *it = it_backup; | |
47589c8c | 5330 | reached = 6; |
5f5c8ee5 GM |
5331 | } |
5332 | else if (skip == MOVE_X_REACHED) | |
5333 | { | |
5334 | skip = skip2; | |
5335 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 5336 | reached = 7; |
5f5c8ee5 GM |
5337 | } |
5338 | ||
47589c8c | 5339 | if (reached) |
5f5c8ee5 GM |
5340 | break; |
5341 | } | |
5342 | else | |
5343 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
5344 | ||
5345 | switch (skip) | |
5346 | { | |
5347 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
5348 | reached = 8; |
5349 | goto out; | |
5f5c8ee5 GM |
5350 | |
5351 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 5352 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5353 | it->continuation_lines_width = 0; |
5354 | break; | |
5355 | ||
5356 | case MOVE_LINE_TRUNCATED: | |
5357 | it->continuation_lines_width = 0; | |
312246d1 | 5358 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5359 | if ((op & MOVE_TO_POS) != 0 |
5360 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
5361 | { |
5362 | reached = 9; | |
5363 | goto out; | |
5364 | } | |
5f5c8ee5 GM |
5365 | break; |
5366 | ||
5367 | case MOVE_LINE_CONTINUED: | |
5368 | it->continuation_lines_width += it->current_x; | |
5369 | break; | |
5370 | ||
5371 | default: | |
5372 | abort (); | |
5373 | } | |
5374 | ||
5375 | /* Reset/increment for the next run. */ | |
5376 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
5377 | it->current_x = it->hpos = 0; | |
5378 | it->current_y += it->max_ascent + it->max_descent; | |
5379 | ++it->vpos; | |
5380 | last_height = it->max_ascent + it->max_descent; | |
5381 | last_max_ascent = it->max_ascent; | |
5382 | it->max_ascent = it->max_descent = 0; | |
5383 | } | |
2311178e | 5384 | |
47589c8c GM |
5385 | out: |
5386 | ||
5387 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
5388 | } |
5389 | ||
5390 | ||
5391 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
5392 | ||
5393 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
5394 | means move IT backward to the preceding line start or BEGV. This | |
5395 | function may move over more than DY pixels if IT->current_y - DY | |
5396 | ends up in the middle of a line; in this case IT->current_y will be | |
5397 | set to the top of the line moved to. */ | |
5398 | ||
5399 | void | |
5400 | move_it_vertically_backward (it, dy) | |
5401 | struct it *it; | |
5402 | int dy; | |
5403 | { | |
79ddf6f7 GM |
5404 | int nlines, h; |
5405 | struct it it2, it3; | |
5f5c8ee5 | 5406 | int start_pos = IT_CHARPOS (*it); |
2311178e | 5407 | |
5f5c8ee5 GM |
5408 | xassert (dy >= 0); |
5409 | ||
5410 | /* Estimate how many newlines we must move back. */ | |
5411 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
5412 | ||
5413 | /* Set the iterator's position that many lines back. */ | |
5414 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
5415 | back_to_previous_visible_line_start (it); | |
5416 | ||
5417 | /* Reseat the iterator here. When moving backward, we don't want | |
5418 | reseat to skip forward over invisible text, set up the iterator | |
5419 | to deliver from overlay strings at the new position etc. So, | |
5420 | use reseat_1 here. */ | |
5421 | reseat_1 (it, it->current.pos, 1); | |
5422 | ||
5423 | /* We are now surely at a line start. */ | |
5424 | it->current_x = it->hpos = 0; | |
0e47bbf7 | 5425 | it->continuation_lines_width = 0; |
5f5c8ee5 GM |
5426 | |
5427 | /* Move forward and see what y-distance we moved. First move to the | |
5428 | start of the next line so that we get its height. We need this | |
5429 | height to be able to tell whether we reached the specified | |
5430 | y-distance. */ | |
5431 | it2 = *it; | |
5432 | it2.max_ascent = it2.max_descent = 0; | |
5433 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
5434 | MOVE_TO_POS | MOVE_TO_VPOS); | |
5435 | xassert (IT_CHARPOS (*it) >= BEGV); | |
79ddf6f7 | 5436 | it3 = it2; |
2311178e | 5437 | |
5f5c8ee5 GM |
5438 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
5439 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5440 | h = it2.current_y - it->current_y; | |
5441 | nlines = it2.vpos - it->vpos; | |
5442 | ||
5443 | /* Correct IT's y and vpos position. */ | |
5444 | it->vpos -= nlines; | |
5445 | it->current_y -= h; | |
2311178e | 5446 | |
5f5c8ee5 GM |
5447 | if (dy == 0) |
5448 | { | |
5449 | /* DY == 0 means move to the start of the screen line. The | |
5450 | value of nlines is > 0 if continuation lines were involved. */ | |
5451 | if (nlines > 0) | |
5452 | move_it_by_lines (it, nlines, 1); | |
5453 | xassert (IT_CHARPOS (*it) <= start_pos); | |
5454 | } | |
5455 | else if (nlines) | |
5456 | { | |
5457 | /* The y-position we try to reach. Note that h has been | |
5458 | subtracted in front of the if-statement. */ | |
5459 | int target_y = it->current_y + h - dy; | |
79ddf6f7 GM |
5460 | int y0 = it3.current_y; |
5461 | int y1 = line_bottom_y (&it3); | |
5462 | int line_height = y1 - y0; | |
f7ccfc8c | 5463 | |
5f5c8ee5 GM |
5464 | /* If we did not reach target_y, try to move further backward if |
5465 | we can. If we moved too far backward, try to move forward. */ | |
5466 | if (target_y < it->current_y | |
79ddf6f7 GM |
5467 | /* This is heuristic. In a window that's 3 lines high, with |
5468 | a line height of 13 pixels each, recentering with point | |
5469 | on the bottom line will try to move -39/2 = 19 pixels | |
5470 | backward. Try to avoid moving into the first line. */ | |
798dbe1f | 5471 | && it->current_y - target_y > line_height / 3 * 2 |
5f5c8ee5 GM |
5472 | && IT_CHARPOS (*it) > BEGV) |
5473 | { | |
f7ccfc8c GM |
5474 | TRACE_MOVE ((stderr, " not far enough -> move_vert %d\n", |
5475 | target_y - it->current_y)); | |
5f5c8ee5 GM |
5476 | move_it_vertically (it, target_y - it->current_y); |
5477 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5478 | } | |
5479 | else if (target_y >= it->current_y + line_height | |
5480 | && IT_CHARPOS (*it) < ZV) | |
5481 | { | |
55591976 | 5482 | /* Should move forward by at least one line, maybe more. |
2311178e | 5483 | |
55591976 GM |
5484 | Note: Calling move_it_by_lines can be expensive on |
5485 | terminal frames, where compute_motion is used (via | |
5486 | vmotion) to do the job, when there are very long lines | |
5487 | and truncate-lines is nil. That's the reason for | |
5488 | treating terminal frames specially here. */ | |
2311178e | 5489 | |
55591976 GM |
5490 | if (!FRAME_WINDOW_P (it->f)) |
5491 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
5492 | else | |
f7ccfc8c | 5493 | { |
55591976 GM |
5494 | do |
5495 | { | |
5496 | move_it_by_lines (it, 1, 1); | |
5497 | } | |
5498 | while (target_y >= line_bottom_y (it) && IT_CHARPOS (*it) < ZV); | |
f7ccfc8c | 5499 | } |
f7ccfc8c | 5500 | |
5f5c8ee5 GM |
5501 | xassert (IT_CHARPOS (*it) >= BEGV); |
5502 | } | |
5503 | } | |
5504 | } | |
5505 | ||
5506 | ||
5507 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
5508 | move backwards. DY = 0 means move to start of screen line. At the | |
5509 | end, IT will be on the start of a screen line. */ | |
5510 | ||
2311178e | 5511 | void |
5f5c8ee5 GM |
5512 | move_it_vertically (it, dy) |
5513 | struct it *it; | |
5514 | int dy; | |
5515 | { | |
5516 | if (dy <= 0) | |
5517 | move_it_vertically_backward (it, -dy); | |
5518 | else if (dy > 0) | |
5519 | { | |
47589c8c | 5520 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
5521 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
5522 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 5523 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5524 | |
5525 | /* If buffer ends in ZV without a newline, move to the start of | |
5526 | the line to satisfy the post-condition. */ | |
5527 | if (IT_CHARPOS (*it) == ZV | |
5528 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
5529 | move_it_by_lines (it, 0, 0); | |
5530 | } | |
5531 | } | |
5532 | ||
5533 | ||
47fc2c10 GM |
5534 | /* Move iterator IT past the end of the text line it is in. */ |
5535 | ||
5536 | void | |
5537 | move_it_past_eol (it) | |
5538 | struct it *it; | |
5539 | { | |
5540 | enum move_it_result rc; | |
2311178e | 5541 | |
47fc2c10 GM |
5542 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); |
5543 | if (rc == MOVE_NEWLINE_OR_CR) | |
5544 | set_iterator_to_next (it, 0); | |
5545 | } | |
5546 | ||
5547 | ||
2c79b732 GM |
5548 | #if 0 /* Currently not used. */ |
5549 | ||
5f5c8ee5 GM |
5550 | /* Return non-zero if some text between buffer positions START_CHARPOS |
5551 | and END_CHARPOS is invisible. IT->window is the window for text | |
5552 | property lookup. */ | |
5553 | ||
5554 | static int | |
5555 | invisible_text_between_p (it, start_charpos, end_charpos) | |
5556 | struct it *it; | |
5557 | int start_charpos, end_charpos; | |
5558 | { | |
5f5c8ee5 GM |
5559 | Lisp_Object prop, limit; |
5560 | int invisible_found_p; | |
2311178e | 5561 | |
5f5c8ee5 GM |
5562 | xassert (it != NULL && start_charpos <= end_charpos); |
5563 | ||
5564 | /* Is text at START invisible? */ | |
5565 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
5566 | it->window); | |
5567 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
5568 | invisible_found_p = 1; | |
5569 | else | |
5570 | { | |
016b5642 MB |
5571 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
5572 | Qinvisible, Qnil, | |
5573 | make_number (end_charpos)); | |
5f5c8ee5 GM |
5574 | invisible_found_p = XFASTINT (limit) < end_charpos; |
5575 | } | |
5576 | ||
5577 | return invisible_found_p; | |
5f5c8ee5 GM |
5578 | } |
5579 | ||
2c79b732 GM |
5580 | #endif /* 0 */ |
5581 | ||
5f5c8ee5 GM |
5582 | |
5583 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
5584 | negative means move up. DVPOS == 0 means move to the start of the | |
5585 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
5586 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
5587 | ||
5588 | Further optimization ideas: If we would know that IT->f doesn't use | |
5589 | a face with proportional font, we could be faster for | |
5590 | truncate-lines nil. */ | |
5591 | ||
5592 | void | |
5593 | move_it_by_lines (it, dvpos, need_y_p) | |
5594 | struct it *it; | |
5595 | int dvpos, need_y_p; | |
5596 | { | |
5597 | struct position pos; | |
2311178e | 5598 | |
5f5c8ee5 GM |
5599 | if (!FRAME_WINDOW_P (it->f)) |
5600 | { | |
5601 | struct text_pos textpos; | |
2311178e | 5602 | |
5f5c8ee5 GM |
5603 | /* We can use vmotion on frames without proportional fonts. */ |
5604 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
5605 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
5606 | reseat (it, textpos, 1); | |
5607 | it->vpos += pos.vpos; | |
5608 | it->current_y += pos.vpos; | |
5609 | } | |
5610 | else if (dvpos == 0) | |
5611 | { | |
5612 | /* DVPOS == 0 means move to the start of the screen line. */ | |
5613 | move_it_vertically_backward (it, 0); | |
5614 | xassert (it->current_x == 0 && it->hpos == 0); | |
5615 | } | |
5616 | else if (dvpos > 0) | |
2c79b732 | 5617 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); |
5f5c8ee5 GM |
5618 | else |
5619 | { | |
5620 | struct it it2; | |
5621 | int start_charpos, i; | |
2311178e | 5622 | |
e8660d73 GM |
5623 | /* Start at the beginning of the screen line containing IT's |
5624 | position. */ | |
5625 | move_it_vertically_backward (it, 0); | |
2311178e | 5626 | |
5f5c8ee5 GM |
5627 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
5628 | start_charpos = IT_CHARPOS (*it); | |
5629 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
5630 | back_to_previous_visible_line_start (it); | |
5631 | reseat (it, it->current.pos, 1); | |
5632 | it->current_x = it->hpos = 0; | |
5633 | ||
5634 | /* Above call may have moved too far if continuation lines | |
5635 | are involved. Scan forward and see if it did. */ | |
5636 | it2 = *it; | |
5637 | it2.vpos = it2.current_y = 0; | |
5638 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
5639 | it->vpos -= it2.vpos; | |
5640 | it->current_y -= it2.current_y; | |
5641 | it->current_x = it->hpos = 0; | |
5642 | ||
5643 | /* If we moved too far, move IT some lines forward. */ | |
5644 | if (it2.vpos > -dvpos) | |
5645 | { | |
5646 | int delta = it2.vpos + dvpos; | |
5647 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
5648 | } | |
5649 | } | |
5650 | } | |
5651 | ||
5652 | ||
5653 | \f | |
5654 | /*********************************************************************** | |
5655 | Messages | |
5656 | ***********************************************************************/ | |
5657 | ||
5658 | ||
937248bc GM |
5659 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
5660 | to *Messages*. */ | |
5661 | ||
5662 | void | |
5663 | add_to_log (format, arg1, arg2) | |
5664 | char *format; | |
5665 | Lisp_Object arg1, arg2; | |
5666 | { | |
5667 | Lisp_Object args[3]; | |
5668 | Lisp_Object msg, fmt; | |
5669 | char *buffer; | |
5670 | int len; | |
5671 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5672 | ||
ae794295 GM |
5673 | /* Do nothing if called asynchronously. Inserting text into |
5674 | a buffer may call after-change-functions and alike and | |
5675 | that would means running Lisp asynchronously. */ | |
5676 | if (handling_signal) | |
5677 | return; | |
5678 | ||
937248bc GM |
5679 | fmt = msg = Qnil; |
5680 | GCPRO4 (fmt, msg, arg1, arg2); | |
2311178e | 5681 | |
937248bc GM |
5682 | args[0] = fmt = build_string (format); |
5683 | args[1] = arg1; | |
5684 | args[2] = arg2; | |
6fc556fd | 5685 | msg = Fformat (3, args); |
937248bc | 5686 | |
2051c264 | 5687 | len = SBYTES (msg) + 1; |
937248bc | 5688 | buffer = (char *) alloca (len); |
2051c264 | 5689 | bcopy (SDATA (msg), buffer, len); |
2311178e | 5690 | |
796184bc | 5691 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
5692 | UNGCPRO; |
5693 | } | |
5694 | ||
5695 | ||
5f5c8ee5 GM |
5696 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
5697 | ||
5698 | void | |
5699 | message_log_maybe_newline () | |
5700 | { | |
5701 | if (message_log_need_newline) | |
5702 | message_dolog ("", 0, 1, 0); | |
5703 | } | |
5704 | ||
5705 | ||
1e313f28 | 5706 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
5707 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
5708 | nonzero, means interpret the contents of M as multibyte. This | |
5709 | function calls low-level routines in order to bypass text property | |
5710 | hooks, etc. which might not be safe to run. */ | |
5711 | ||
5712 | void | |
1e313f28 | 5713 | message_dolog (m, nbytes, nlflag, multibyte) |
50f80c2f | 5714 | const char *m; |
1e313f28 | 5715 | int nbytes, nlflag, multibyte; |
5f5c8ee5 | 5716 | { |
a67e162b RS |
5717 | if (!NILP (Vmemory_full)) |
5718 | return; | |
5719 | ||
5f5c8ee5 GM |
5720 | if (!NILP (Vmessage_log_max)) |
5721 | { | |
5722 | struct buffer *oldbuf; | |
5723 | Lisp_Object oldpoint, oldbegv, oldzv; | |
5724 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
5725 | int point_at_end = 0; | |
5726 | int zv_at_end = 0; | |
5727 | Lisp_Object old_deactivate_mark, tem; | |
6052529b | 5728 | struct gcpro gcpro1; |
5f5c8ee5 GM |
5729 | |
5730 | old_deactivate_mark = Vdeactivate_mark; | |
5731 | oldbuf = current_buffer; | |
6a94510a | 5732 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
5733 | current_buffer->undo_list = Qt; |
5734 | ||
b14bc55e RS |
5735 | oldpoint = message_dolog_marker1; |
5736 | set_marker_restricted (oldpoint, make_number (PT), Qnil); | |
5737 | oldbegv = message_dolog_marker2; | |
5738 | set_marker_restricted (oldbegv, make_number (BEGV), Qnil); | |
5739 | oldzv = message_dolog_marker3; | |
5740 | set_marker_restricted (oldzv, make_number (ZV), Qnil); | |
5741 | GCPRO1 (old_deactivate_mark); | |
5f5c8ee5 GM |
5742 | |
5743 | if (PT == Z) | |
5744 | point_at_end = 1; | |
5745 | if (ZV == Z) | |
5746 | zv_at_end = 1; | |
5747 | ||
5748 | BEGV = BEG; | |
5749 | BEGV_BYTE = BEG_BYTE; | |
5750 | ZV = Z; | |
5751 | ZV_BYTE = Z_BYTE; | |
5752 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5753 | ||
5754 | /* Insert the string--maybe converting multibyte to single byte | |
5755 | or vice versa, so that all the text fits the buffer. */ | |
5756 | if (multibyte | |
5757 | && NILP (current_buffer->enable_multibyte_characters)) | |
5758 | { | |
1e313f28 | 5759 | int i, c, char_bytes; |
5f5c8ee5 | 5760 | unsigned char work[1]; |
2311178e | 5761 | |
5f5c8ee5 GM |
5762 | /* Convert a multibyte string to single-byte |
5763 | for the *Message* buffer. */ | |
6e57ec5e | 5764 | for (i = 0; i < nbytes; i += char_bytes) |
5f5c8ee5 | 5765 | { |
1e313f28 | 5766 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
5767 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
5768 | ? c | |
5769 | : multibyte_char_to_unibyte (c, Qnil)); | |
5770 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5771 | } | |
5772 | } | |
5773 | else if (! multibyte | |
5774 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
5775 | { | |
1e313f28 | 5776 | int i, c, char_bytes; |
5f5c8ee5 | 5777 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 5778 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
5779 | /* Convert a single-byte string to multibyte |
5780 | for the *Message* buffer. */ | |
1e313f28 | 5781 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
5782 | { |
5783 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
5784 | char_bytes = CHAR_STRING (c, str); |
5785 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
5786 | } |
5787 | } | |
1e313f28 GM |
5788 | else if (nbytes) |
5789 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
5790 | |
5791 | if (nlflag) | |
5792 | { | |
5793 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
5794 | insert_1 ("\n", 1, 1, 0, 0); | |
5795 | ||
5796 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
5797 | this_bol = PT; | |
5798 | this_bol_byte = PT_BYTE; | |
5799 | ||
b14bc55e RS |
5800 | /* See if this line duplicates the previous one. |
5801 | If so, combine duplicates. */ | |
5f5c8ee5 GM |
5802 | if (this_bol > BEG) |
5803 | { | |
5804 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
5805 | prev_bol = PT; | |
5806 | prev_bol_byte = PT_BYTE; | |
5807 | ||
5808 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
5809 | this_bol, this_bol_byte); | |
5810 | if (dup) | |
5811 | { | |
5812 | del_range_both (prev_bol, prev_bol_byte, | |
5813 | this_bol, this_bol_byte, 0); | |
5814 | if (dup > 1) | |
5815 | { | |
5816 | char dupstr[40]; | |
5817 | int duplen; | |
5818 | ||
5819 | /* If you change this format, don't forget to also | |
5820 | change message_log_check_duplicate. */ | |
5821 | sprintf (dupstr, " [%d times]", dup); | |
5822 | duplen = strlen (dupstr); | |
5823 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
5824 | insert_1 (dupstr, duplen, 1, 0, 1); | |
5825 | } | |
5826 | } | |
5827 | } | |
5828 | ||
b14bc55e RS |
5829 | /* If we have more than the desired maximum number of lines |
5830 | in the *Messages* buffer now, delete the oldest ones. | |
5831 | This is safe because we don't have undo in this buffer. */ | |
5832 | ||
5f5c8ee5 GM |
5833 | if (NATNUMP (Vmessage_log_max)) |
5834 | { | |
5835 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
5836 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
5837 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
5838 | } | |
5839 | } | |
5840 | BEGV = XMARKER (oldbegv)->charpos; | |
5841 | BEGV_BYTE = marker_byte_position (oldbegv); | |
5842 | ||
5843 | if (zv_at_end) | |
5844 | { | |
5845 | ZV = Z; | |
5846 | ZV_BYTE = Z_BYTE; | |
5847 | } | |
5848 | else | |
5849 | { | |
5850 | ZV = XMARKER (oldzv)->charpos; | |
5851 | ZV_BYTE = marker_byte_position (oldzv); | |
5852 | } | |
5853 | ||
5854 | if (point_at_end) | |
5855 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5856 | else | |
5857 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
5858 | Lisp code. */ | |
5859 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
5860 | XMARKER (oldpoint)->bytepos); | |
5861 | ||
5862 | UNGCPRO; | |
b14bc55e RS |
5863 | unchain_marker (oldpoint); |
5864 | unchain_marker (oldbegv); | |
5865 | unchain_marker (oldzv); | |
5f5c8ee5 GM |
5866 | |
5867 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
5868 | set_buffer_internal (oldbuf); | |
5869 | if (NILP (tem)) | |
5870 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
5871 | message_log_need_newline = !nlflag; | |
5872 | Vdeactivate_mark = old_deactivate_mark; | |
5873 | } | |
5874 | } | |
5875 | ||
5876 | ||
5877 | /* We are at the end of the buffer after just having inserted a newline. | |
5878 | (Note: We depend on the fact we won't be crossing the gap.) | |
5879 | Check to see if the most recent message looks a lot like the previous one. | |
5880 | Return 0 if different, 1 if the new one should just replace it, or a | |
5881 | value N > 1 if we should also append " [N times]". */ | |
5882 | ||
5883 | static int | |
5884 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
5885 | int prev_bol, this_bol; | |
5886 | int prev_bol_byte, this_bol_byte; | |
5887 | { | |
5888 | int i; | |
5889 | int len = Z_BYTE - 1 - this_bol_byte; | |
5890 | int seen_dots = 0; | |
5891 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
5892 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
5893 | ||
5894 | for (i = 0; i < len; i++) | |
5895 | { | |
509633e3 | 5896 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
5897 | seen_dots = 1; |
5898 | if (p1[i] != p2[i]) | |
5899 | return seen_dots; | |
5900 | } | |
5901 | p1 += len; | |
5902 | if (*p1 == '\n') | |
5903 | return 2; | |
5904 | if (*p1++ == ' ' && *p1++ == '[') | |
5905 | { | |
5906 | int n = 0; | |
5907 | while (*p1 >= '0' && *p1 <= '9') | |
5908 | n = n * 10 + *p1++ - '0'; | |
5909 | if (strncmp (p1, " times]\n", 8) == 0) | |
5910 | return n+1; | |
5911 | } | |
5912 | return 0; | |
5913 | } | |
5914 | ||
5915 | ||
1e313f28 GM |
5916 | /* Display an echo area message M with a specified length of NBYTES |
5917 | bytes. The string may include null characters. If M is 0, clear | |
5918 | out any existing message, and let the mini-buffer text show | |
5919 | through. | |
5f5c8ee5 GM |
5920 | |
5921 | The buffer M must continue to exist until after the echo area gets | |
5922 | cleared or some other message gets displayed there. This means do | |
5923 | not pass text that is stored in a Lisp string; do not pass text in | |
5924 | a buffer that was alloca'd. */ | |
5925 | ||
5926 | void | |
1e313f28 | 5927 | message2 (m, nbytes, multibyte) |
50f80c2f | 5928 | const char *m; |
1e313f28 | 5929 | int nbytes; |
5f5c8ee5 GM |
5930 | int multibyte; |
5931 | { | |
5932 | /* First flush out any partial line written with print. */ | |
5933 | message_log_maybe_newline (); | |
5934 | if (m) | |
1e313f28 GM |
5935 | message_dolog (m, nbytes, 1, multibyte); |
5936 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5937 | } |
5938 | ||
5939 | ||
5940 | /* The non-logging counterpart of message2. */ | |
5941 | ||
5942 | void | |
1e313f28 | 5943 | message2_nolog (m, nbytes, multibyte) |
50f80c2f | 5944 | const char *m; |
e3383b6f | 5945 | int nbytes, multibyte; |
5f5c8ee5 | 5946 | { |
886bd6f2 | 5947 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5948 | message_enable_multibyte = multibyte; |
5949 | ||
5950 | if (noninteractive) | |
5951 | { | |
5952 | if (noninteractive_need_newline) | |
5953 | putc ('\n', stderr); | |
5954 | noninteractive_need_newline = 0; | |
5955 | if (m) | |
1e313f28 | 5956 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
5957 | if (cursor_in_echo_area == 0) |
5958 | fprintf (stderr, "\n"); | |
5959 | fflush (stderr); | |
5960 | } | |
5961 | /* A null message buffer means that the frame hasn't really been | |
5962 | initialized yet. Error messages get reported properly by | |
5963 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 5964 | else if (INTERACTIVE |
886bd6f2 GM |
5965 | && sf->glyphs_initialized_p |
5966 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5967 | { |
5968 | Lisp_Object mini_window; | |
5969 | struct frame *f; | |
5970 | ||
5971 | /* Get the frame containing the mini-buffer | |
5972 | that the selected frame is using. */ | |
886bd6f2 | 5973 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5974 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5975 | ||
5976 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5977 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
5978 | && ! FRAME_VISIBLE_P (f)) |
5979 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
5980 | ||
5981 | if (m) | |
5982 | { | |
1e313f28 | 5983 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
5984 | if (minibuffer_auto_raise) |
5985 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5986 | } | |
5987 | else | |
c6e89d6c | 5988 | clear_message (1, 1); |
5f5c8ee5 | 5989 | |
c6e89d6c | 5990 | do_pending_window_change (0); |
5f5c8ee5 | 5991 | echo_area_display (1); |
c6e89d6c | 5992 | do_pending_window_change (0); |
5f5c8ee5 GM |
5993 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5994 | (*frame_up_to_date_hook) (f); | |
5995 | } | |
5996 | } | |
5997 | ||
5998 | ||
c6e89d6c GM |
5999 | /* Display an echo area message M with a specified length of NBYTES |
6000 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
6001 | string, clear out any existing message, and let the mini-buffer |
6002 | text show through. */ | |
6003 | ||
6004 | void | |
c6e89d6c | 6005 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 6006 | Lisp_Object m; |
c6e89d6c | 6007 | int nbytes; |
5f5c8ee5 GM |
6008 | int multibyte; |
6009 | { | |
6010 | struct gcpro gcpro1; | |
6011 | ||
6012 | GCPRO1 (m); | |
2311178e | 6013 | |
5f5c8ee5 GM |
6014 | /* First flush out any partial line written with print. */ |
6015 | message_log_maybe_newline (); | |
6016 | if (STRINGP (m)) | |
2051c264 | 6017 | message_dolog (SDATA (m), nbytes, 1, multibyte); |
c6e89d6c | 6018 | message3_nolog (m, nbytes, multibyte); |
5f5c8ee5 GM |
6019 | |
6020 | UNGCPRO; | |
6021 | } | |
6022 | ||
6023 | ||
6024 | /* The non-logging version of message3. */ | |
6025 | ||
6026 | void | |
c6e89d6c | 6027 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 6028 | Lisp_Object m; |
c6e89d6c | 6029 | int nbytes, multibyte; |
5f5c8ee5 | 6030 | { |
886bd6f2 | 6031 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6032 | message_enable_multibyte = multibyte; |
6033 | ||
6034 | if (noninteractive) | |
6035 | { | |
6036 | if (noninteractive_need_newline) | |
6037 | putc ('\n', stderr); | |
6038 | noninteractive_need_newline = 0; | |
6039 | if (STRINGP (m)) | |
2051c264 | 6040 | fwrite (SDATA (m), nbytes, 1, stderr); |
5f5c8ee5 GM |
6041 | if (cursor_in_echo_area == 0) |
6042 | fprintf (stderr, "\n"); | |
6043 | fflush (stderr); | |
6044 | } | |
6045 | /* A null message buffer means that the frame hasn't really been | |
6046 | initialized yet. Error messages get reported properly by | |
6047 | cmd_error, so this must be just an informative message; toss it. */ | |
2311178e | 6048 | else if (INTERACTIVE |
886bd6f2 GM |
6049 | && sf->glyphs_initialized_p |
6050 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
6051 | { |
6052 | Lisp_Object mini_window; | |
c6e89d6c | 6053 | Lisp_Object frame; |
5f5c8ee5 GM |
6054 | struct frame *f; |
6055 | ||
6056 | /* Get the frame containing the mini-buffer | |
6057 | that the selected frame is using. */ | |
886bd6f2 | 6058 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6059 | frame = XWINDOW (mini_window)->frame; |
6060 | f = XFRAME (frame); | |
5f5c8ee5 GM |
6061 | |
6062 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 6063 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
6064 | && !FRAME_VISIBLE_P (f)) |
6065 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 6066 | |
2051c264 | 6067 | if (STRINGP (m) && SCHARS (m) > 0) |
5f5c8ee5 | 6068 | { |
c6e89d6c | 6069 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
6070 | if (minibuffer_auto_raise) |
6071 | Fraise_frame (frame); | |
5f5c8ee5 GM |
6072 | } |
6073 | else | |
c6e89d6c | 6074 | clear_message (1, 1); |
5f5c8ee5 | 6075 | |
c6e89d6c | 6076 | do_pending_window_change (0); |
5f5c8ee5 | 6077 | echo_area_display (1); |
c6e89d6c | 6078 | do_pending_window_change (0); |
5f5c8ee5 GM |
6079 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
6080 | (*frame_up_to_date_hook) (f); | |
6081 | } | |
6082 | } | |
6083 | ||
6084 | ||
6085 | /* Display a null-terminated echo area message M. If M is 0, clear | |
6086 | out any existing message, and let the mini-buffer text show through. | |
6087 | ||
6088 | The buffer M must continue to exist until after the echo area gets | |
6089 | cleared or some other message gets displayed there. Do not pass | |
6090 | text that is stored in a Lisp string. Do not pass text in a buffer | |
6091 | that was alloca'd. */ | |
6092 | ||
6093 | void | |
6094 | message1 (m) | |
6095 | char *m; | |
6096 | { | |
6097 | message2 (m, (m ? strlen (m) : 0), 0); | |
6098 | } | |
6099 | ||
6100 | ||
6101 | /* The non-logging counterpart of message1. */ | |
6102 | ||
6103 | void | |
6104 | message1_nolog (m) | |
6105 | char *m; | |
6106 | { | |
6107 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
6108 | } | |
6109 | ||
6110 | /* Display a message M which contains a single %s | |
6111 | which gets replaced with STRING. */ | |
6112 | ||
6113 | void | |
6114 | message_with_string (m, string, log) | |
6115 | char *m; | |
6116 | Lisp_Object string; | |
6117 | int log; | |
6118 | { | |
5b6d51b6 RS |
6119 | CHECK_STRING (string); |
6120 | ||
5f5c8ee5 GM |
6121 | if (noninteractive) |
6122 | { | |
6123 | if (m) | |
6124 | { | |
6125 | if (noninteractive_need_newline) | |
6126 | putc ('\n', stderr); | |
6127 | noninteractive_need_newline = 0; | |
2051c264 | 6128 | fprintf (stderr, m, SDATA (string)); |
5f5c8ee5 GM |
6129 | if (cursor_in_echo_area == 0) |
6130 | fprintf (stderr, "\n"); | |
6131 | fflush (stderr); | |
6132 | } | |
6133 | } | |
6134 | else if (INTERACTIVE) | |
6135 | { | |
6136 | /* The frame whose minibuffer we're going to display the message on. | |
6137 | It may be larger than the selected frame, so we need | |
6138 | to use its buffer, not the selected frame's buffer. */ | |
6139 | Lisp_Object mini_window; | |
886bd6f2 | 6140 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6141 | |
6142 | /* Get the frame containing the minibuffer | |
6143 | that the selected frame is using. */ | |
886bd6f2 | 6144 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6145 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6146 | ||
6147 | /* A null message buffer means that the frame hasn't really been | |
6148 | initialized yet. Error messages get reported properly by | |
6149 | cmd_error, so this must be just an informative message; toss it. */ | |
6150 | if (FRAME_MESSAGE_BUF (f)) | |
6151 | { | |
eb484132 GM |
6152 | Lisp_Object args[2], message; |
6153 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 6154 | |
eb484132 GM |
6155 | args[0] = build_string (m); |
6156 | args[1] = message = string; | |
78e17433 | 6157 | GCPRO2 (args[0], message); |
eb484132 | 6158 | gcpro1.nvars = 2; |
2311178e | 6159 | |
eb484132 | 6160 | message = Fformat (2, args); |
5f5c8ee5 GM |
6161 | |
6162 | if (log) | |
d5db4077 | 6163 | message3 (message, SBYTES (message), STRING_MULTIBYTE (message)); |
5f5c8ee5 | 6164 | else |
d5db4077 | 6165 | message3_nolog (message, SBYTES (message), STRING_MULTIBYTE (message)); |
eb484132 GM |
6166 | |
6167 | UNGCPRO; | |
5f5c8ee5 GM |
6168 | |
6169 | /* Print should start at the beginning of the message | |
6170 | buffer next time. */ | |
6171 | message_buf_print = 0; | |
6172 | } | |
6173 | } | |
6174 | } | |
6175 | ||
6176 | ||
5f5c8ee5 GM |
6177 | /* Dump an informative message to the minibuf. If M is 0, clear out |
6178 | any existing message, and let the mini-buffer text show through. */ | |
6179 | ||
6180 | /* VARARGS 1 */ | |
6181 | void | |
6182 | message (m, a1, a2, a3) | |
6183 | char *m; | |
6184 | EMACS_INT a1, a2, a3; | |
6185 | { | |
6186 | if (noninteractive) | |
6187 | { | |
6188 | if (m) | |
6189 | { | |
6190 | if (noninteractive_need_newline) | |
6191 | putc ('\n', stderr); | |
6192 | noninteractive_need_newline = 0; | |
6193 | fprintf (stderr, m, a1, a2, a3); | |
6194 | if (cursor_in_echo_area == 0) | |
6195 | fprintf (stderr, "\n"); | |
6196 | fflush (stderr); | |
6197 | } | |
6198 | } | |
6199 | else if (INTERACTIVE) | |
6200 | { | |
6201 | /* The frame whose mini-buffer we're going to display the message | |
6202 | on. It may be larger than the selected frame, so we need to | |
6203 | use its buffer, not the selected frame's buffer. */ | |
6204 | Lisp_Object mini_window; | |
886bd6f2 | 6205 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6206 | |
6207 | /* Get the frame containing the mini-buffer | |
6208 | that the selected frame is using. */ | |
886bd6f2 | 6209 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6210 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6211 | ||
6212 | /* A null message buffer means that the frame hasn't really been | |
6213 | initialized yet. Error messages get reported properly by | |
6214 | cmd_error, so this must be just an informative message; toss | |
6215 | it. */ | |
6216 | if (FRAME_MESSAGE_BUF (f)) | |
6217 | { | |
6218 | if (m) | |
6219 | { | |
6220 | int len; | |
6221 | #ifdef NO_ARG_ARRAY | |
6222 | char *a[3]; | |
6223 | a[0] = (char *) a1; | |
6224 | a[1] = (char *) a2; | |
6225 | a[2] = (char *) a3; | |
6226 | ||
6227 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6228 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6229 | #else | |
6230 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6231 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
6232 | (char **) &a1); | |
6233 | #endif /* NO_ARG_ARRAY */ | |
6234 | ||
6235 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
6236 | } | |
6237 | else | |
6238 | message1 (0); | |
6239 | ||
6240 | /* Print should start at the beginning of the message | |
6241 | buffer next time. */ | |
6242 | message_buf_print = 0; | |
6243 | } | |
6244 | } | |
6245 | } | |
6246 | ||
6247 | ||
6248 | /* The non-logging version of message. */ | |
6249 | ||
6250 | void | |
6251 | message_nolog (m, a1, a2, a3) | |
6252 | char *m; | |
6253 | EMACS_INT a1, a2, a3; | |
6254 | { | |
6255 | Lisp_Object old_log_max; | |
6256 | old_log_max = Vmessage_log_max; | |
6257 | Vmessage_log_max = Qnil; | |
6258 | message (m, a1, a2, a3); | |
6259 | Vmessage_log_max = old_log_max; | |
6260 | } | |
6261 | ||
6262 | ||
c6e89d6c GM |
6263 | /* Display the current message in the current mini-buffer. This is |
6264 | only called from error handlers in process.c, and is not time | |
6265 | critical. */ | |
5f5c8ee5 GM |
6266 | |
6267 | void | |
6268 | update_echo_area () | |
6269 | { | |
c6e89d6c GM |
6270 | if (!NILP (echo_area_buffer[0])) |
6271 | { | |
6272 | Lisp_Object string; | |
6273 | string = Fcurrent_message (); | |
2311178e | 6274 | message3 (string, SBYTES (string), |
c6e89d6c GM |
6275 | !NILP (current_buffer->enable_multibyte_characters)); |
6276 | } | |
6277 | } | |
6278 | ||
6279 | ||
a67e162b RS |
6280 | /* Make sure echo area buffers in `echo_buffers' are live. |
6281 | If they aren't, make new ones. */ | |
5bcfeb49 GM |
6282 | |
6283 | static void | |
6284 | ensure_echo_area_buffers () | |
6285 | { | |
6286 | int i; | |
6287 | ||
6288 | for (i = 0; i < 2; ++i) | |
6289 | if (!BUFFERP (echo_buffer[i]) | |
6290 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
6291 | { | |
6292 | char name[30]; | |
ff3d9573 GM |
6293 | Lisp_Object old_buffer; |
6294 | int j; | |
6295 | ||
6296 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
6297 | sprintf (name, " *Echo Area %d*", i); |
6298 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 6299 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
6300 | |
6301 | for (j = 0; j < 2; ++j) | |
6302 | if (EQ (old_buffer, echo_area_buffer[j])) | |
6303 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
6304 | } |
6305 | } | |
6306 | ||
6307 | ||
23a96c77 | 6308 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
6309 | echo_area_buffer as current buffer. |
6310 | ||
6311 | WHICH zero means use the current message buffer | |
6312 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
6313 | from echo_buffer[] and clear it. | |
6314 | ||
6315 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
6316 | suitable buffer from echo_buffer[] and clear it. | |
6317 | ||
6318 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
6319 | that the current message becomes the last displayed one, make | |
6320 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
6321 | ||
4b41cebb | 6322 | Value is what FN returns. */ |
c6e89d6c GM |
6323 | |
6324 | static int | |
23a96c77 | 6325 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
6326 | struct window *w; |
6327 | int which; | |
23dd2d97 KR |
6328 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
6329 | EMACS_INT a1; | |
6330 | Lisp_Object a2; | |
6331 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6332 | { |
6333 | Lisp_Object buffer; | |
15e26c76 | 6334 | int this_one, the_other, clear_buffer_p, rc; |
331379bf | 6335 | int count = SPECPDL_INDEX (); |
c6e89d6c | 6336 | |
9583b2bb | 6337 | /* If buffers aren't live, make new ones. */ |
5bcfeb49 | 6338 | ensure_echo_area_buffers (); |
c6e89d6c GM |
6339 | |
6340 | clear_buffer_p = 0; | |
2311178e | 6341 | |
c6e89d6c GM |
6342 | if (which == 0) |
6343 | this_one = 0, the_other = 1; | |
6344 | else if (which > 0) | |
6345 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 6346 | else |
c6e89d6c GM |
6347 | { |
6348 | this_one = 0, the_other = 1; | |
6349 | clear_buffer_p = 1; | |
2311178e | 6350 | |
c6e89d6c GM |
6351 | /* We need a fresh one in case the current echo buffer equals |
6352 | the one containing the last displayed echo area message. */ | |
6353 | if (!NILP (echo_area_buffer[this_one]) | |
6354 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
6355 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
6356 | } |
6357 | ||
6358 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
6359 | have one. */ | |
6360 | if (NILP (echo_area_buffer[this_one])) | |
6361 | { | |
6362 | echo_area_buffer[this_one] | |
6363 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
6364 | ? echo_buffer[the_other] | |
6365 | : echo_buffer[this_one]); | |
6366 | clear_buffer_p = 1; | |
6367 | } | |
6368 | ||
6369 | buffer = echo_area_buffer[this_one]; | |
6370 | ||
1013f4e3 GM |
6371 | /* Don't get confused by reusing the buffer used for echoing |
6372 | for a different purpose. */ | |
032906b1 | 6373 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
6374 | cancel_echoing (); |
6375 | ||
c6e89d6c GM |
6376 | record_unwind_protect (unwind_with_echo_area_buffer, |
6377 | with_echo_area_buffer_unwind_data (w)); | |
6378 | ||
6379 | /* Make the echo area buffer current. Note that for display | |
6380 | purposes, it is not necessary that the displayed window's buffer | |
6381 | == current_buffer, except for text property lookup. So, let's | |
6382 | only set that buffer temporarily here without doing a full | |
6383 | Fset_window_buffer. We must also change w->pointm, though, | |
6384 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
6385 | aborts. */ | |
9142dd5b | 6386 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
6387 | if (w) |
6388 | { | |
6389 | w->buffer = buffer; | |
6390 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
6391 | } | |
ad4f174e | 6392 | |
c6e89d6c GM |
6393 | current_buffer->undo_list = Qt; |
6394 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 6395 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 6396 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
6397 | |
6398 | if (clear_buffer_p && Z > BEG) | |
6399 | del_range (BEG, Z); | |
6400 | ||
6401 | xassert (BEGV >= BEG); | |
6402 | xassert (ZV <= Z && ZV >= BEGV); | |
6403 | ||
23a96c77 | 6404 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
6405 | |
6406 | xassert (BEGV >= BEG); | |
6407 | xassert (ZV <= Z && ZV >= BEGV); | |
6408 | ||
6409 | unbind_to (count, Qnil); | |
6410 | return rc; | |
5f5c8ee5 GM |
6411 | } |
6412 | ||
6413 | ||
c6e89d6c GM |
6414 | /* Save state that should be preserved around the call to the function |
6415 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 6416 | |
c6e89d6c GM |
6417 | static Lisp_Object |
6418 | with_echo_area_buffer_unwind_data (w) | |
6419 | struct window *w; | |
5f5c8ee5 | 6420 | { |
c6e89d6c GM |
6421 | int i = 0; |
6422 | Lisp_Object vector; | |
5f5c8ee5 | 6423 | |
c6e89d6c GM |
6424 | /* Reduce consing by keeping one vector in |
6425 | Vwith_echo_area_save_vector. */ | |
6426 | vector = Vwith_echo_area_save_vector; | |
6427 | Vwith_echo_area_save_vector = Qnil; | |
2311178e | 6428 | |
c6e89d6c | 6429 | if (NILP (vector)) |
9142dd5b | 6430 | vector = Fmake_vector (make_number (7), Qnil); |
2311178e | 6431 | |
a61b7058 GM |
6432 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
6433 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
6434 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
2311178e | 6435 | |
c6e89d6c GM |
6436 | if (w) |
6437 | { | |
a61b7058 GM |
6438 | XSETWINDOW (AREF (vector, i), w); ++i; |
6439 | AREF (vector, i) = w->buffer; ++i; | |
6440 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
6441 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
6442 | } |
6443 | else | |
6444 | { | |
6445 | int end = i + 4; | |
a61b7058 GM |
6446 | for (; i < end; ++i) |
6447 | AREF (vector, i) = Qnil; | |
c6e89d6c | 6448 | } |
5f5c8ee5 | 6449 | |
a61b7058 | 6450 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
6451 | return vector; |
6452 | } | |
5f5c8ee5 | 6453 | |
5f5c8ee5 | 6454 | |
c6e89d6c GM |
6455 | /* Restore global state from VECTOR which was created by |
6456 | with_echo_area_buffer_unwind_data. */ | |
6457 | ||
6458 | static Lisp_Object | |
6459 | unwind_with_echo_area_buffer (vector) | |
6460 | Lisp_Object vector; | |
6461 | { | |
bbbf6d06 GM |
6462 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
6463 | Vdeactivate_mark = AREF (vector, 1); | |
6464 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 6465 | |
bbbf6d06 | 6466 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
6467 | { |
6468 | struct window *w; | |
6469 | Lisp_Object buffer, charpos, bytepos; | |
2311178e | 6470 | |
bbbf6d06 GM |
6471 | w = XWINDOW (AREF (vector, 3)); |
6472 | buffer = AREF (vector, 4); | |
6473 | charpos = AREF (vector, 5); | |
6474 | bytepos = AREF (vector, 6); | |
2311178e | 6475 | |
c6e89d6c GM |
6476 | w->buffer = buffer; |
6477 | set_marker_both (w->pointm, buffer, | |
6478 | XFASTINT (charpos), XFASTINT (bytepos)); | |
6479 | } | |
6480 | ||
6481 | Vwith_echo_area_save_vector = vector; | |
6482 | return Qnil; | |
6483 | } | |
6484 | ||
6485 | ||
6486 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
6487 | non-zero means we will print multibyte. */ | |
6488 | ||
6489 | void | |
6490 | setup_echo_area_for_printing (multibyte_p) | |
6491 | int multibyte_p; | |
6492 | { | |
03b0a4b4 RS |
6493 | /* If we can't find an echo area any more, exit. */ |
6494 | if (! FRAME_LIVE_P (XFRAME (selected_frame))) | |
6495 | Fkill_emacs (Qnil); | |
6496 | ||
5bcfeb49 GM |
6497 | ensure_echo_area_buffers (); |
6498 | ||
c6e89d6c GM |
6499 | if (!message_buf_print) |
6500 | { | |
6501 | /* A message has been output since the last time we printed. | |
6502 | Choose a fresh echo area buffer. */ | |
6503 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 6504 | echo_area_buffer[0] = echo_buffer[1]; |
c6e89d6c GM |
6505 | else |
6506 | echo_area_buffer[0] = echo_buffer[0]; | |
6507 | ||
6508 | /* Switch to that buffer and clear it. */ | |
6509 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 6510 | current_buffer->truncate_lines = Qnil; |
2311178e | 6511 | |
c6e89d6c | 6512 | if (Z > BEG) |
bbbf6d06 | 6513 | { |
331379bf | 6514 | int count = SPECPDL_INDEX (); |
bbbf6d06 | 6515 | specbind (Qinhibit_read_only, Qt); |
a67e162b | 6516 | /* Note that undo recording is always disabled. */ |
bbbf6d06 GM |
6517 | del_range (BEG, Z); |
6518 | unbind_to (count, Qnil); | |
6519 | } | |
c6e89d6c GM |
6520 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6521 | ||
6522 | /* Set up the buffer for the multibyteness we need. */ | |
6523 | if (multibyte_p | |
6524 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6525 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
6526 | ||
6527 | /* Raise the frame containing the echo area. */ | |
6528 | if (minibuffer_auto_raise) | |
6529 | { | |
886bd6f2 | 6530 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6531 | Lisp_Object mini_window; |
886bd6f2 | 6532 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6533 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
6534 | } | |
6535 | ||
8a4e3c0c | 6536 | message_log_maybe_newline (); |
c6e89d6c GM |
6537 | message_buf_print = 1; |
6538 | } | |
fa77249f GM |
6539 | else |
6540 | { | |
6541 | if (NILP (echo_area_buffer[0])) | |
6542 | { | |
6543 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
2311178e | 6544 | echo_area_buffer[0] = echo_buffer[1]; |
fa77249f GM |
6545 | else |
6546 | echo_area_buffer[0] = echo_buffer[0]; | |
6547 | } | |
2311178e | 6548 | |
fa77249f | 6549 | if (current_buffer != XBUFFER (echo_area_buffer[0])) |
ab2c5f0a GM |
6550 | { |
6551 | /* Someone switched buffers between print requests. */ | |
6552 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
6553 | current_buffer->truncate_lines = Qnil; | |
6554 | } | |
fa77249f | 6555 | } |
c6e89d6c GM |
6556 | } |
6557 | ||
6558 | ||
dd2eb166 GM |
6559 | /* Display an echo area message in window W. Value is non-zero if W's |
6560 | height is changed. If display_last_displayed_message_p is | |
6561 | non-zero, display the message that was last displayed, otherwise | |
6562 | display the current message. */ | |
c6e89d6c GM |
6563 | |
6564 | static int | |
6565 | display_echo_area (w) | |
6566 | struct window *w; | |
6567 | { | |
25edb08f GM |
6568 | int i, no_message_p, window_height_changed_p, count; |
6569 | ||
6570 | /* Temporarily disable garbage collections while displaying the echo | |
6571 | area. This is done because a GC can print a message itself. | |
6572 | That message would modify the echo area buffer's contents while a | |
6573 | redisplay of the buffer is going on, and seriously confuse | |
6574 | redisplay. */ | |
6575 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
6576 | |
6577 | /* If there is no message, we must call display_echo_area_1 | |
6578 | nevertheless because it resizes the window. But we will have to | |
6579 | reset the echo_area_buffer in question to nil at the end because | |
6580 | with_echo_area_buffer will sets it to an empty buffer. */ | |
6581 | i = display_last_displayed_message_p ? 1 : 0; | |
6582 | no_message_p = NILP (echo_area_buffer[i]); | |
2311178e | 6583 | |
dd2eb166 GM |
6584 | window_height_changed_p |
6585 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 6586 | display_echo_area_1, |
23dd2d97 | 6587 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
6588 | |
6589 | if (no_message_p) | |
6590 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
6591 | |
6592 | unbind_to (count, Qnil); | |
dd2eb166 | 6593 | return window_height_changed_p; |
c6e89d6c GM |
6594 | } |
6595 | ||
6596 | ||
6597 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
6598 | contains the current echo area message in window W, a mini-window, |
6599 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
6600 | Change the height of W so that all of the message is displayed. |
6601 | Value is non-zero if height of W was changed. */ | |
6602 | ||
6603 | static int | |
23a96c77 | 6604 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6605 | EMACS_INT a1; |
6606 | Lisp_Object a2; | |
6607 | EMACS_INT a3, a4; | |
c6e89d6c | 6608 | { |
23a96c77 | 6609 | struct window *w = (struct window *) a1; |
c6e89d6c | 6610 | Lisp_Object window; |
c6e89d6c GM |
6611 | struct text_pos start; |
6612 | int window_height_changed_p = 0; | |
6613 | ||
6614 | /* Do this before displaying, so that we have a large enough glyph | |
6615 | matrix for the display. */ | |
92a90e89 | 6616 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
6617 | |
6618 | /* Display. */ | |
6619 | clear_glyph_matrix (w->desired_matrix); | |
6620 | XSETWINDOW (window, w); | |
6621 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
6622 | try_window (window, start); | |
6623 | ||
c6e89d6c GM |
6624 | return window_height_changed_p; |
6625 | } | |
6626 | ||
6627 | ||
92a90e89 | 6628 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
6629 | currently displayed message, if there is one. If a mini-buffer |
6630 | is active, don't shrink it. */ | |
92a90e89 GM |
6631 | |
6632 | void | |
308a74d8 | 6633 | resize_echo_area_exactly () |
92a90e89 GM |
6634 | { |
6635 | if (BUFFERP (echo_area_buffer[0]) | |
6636 | && WINDOWP (echo_area_window)) | |
6637 | { | |
6638 | struct window *w = XWINDOW (echo_area_window); | |
6639 | int resized_p; | |
6d004fea GM |
6640 | Lisp_Object resize_exactly; |
6641 | ||
6642 | if (minibuf_level == 0) | |
6643 | resize_exactly = Qt; | |
6644 | else | |
6645 | resize_exactly = Qnil; | |
2311178e | 6646 | |
23a96c77 | 6647 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 6648 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
6649 | if (resized_p) |
6650 | { | |
6651 | ++windows_or_buffers_changed; | |
6652 | ++update_mode_lines; | |
6653 | redisplay_internal (0); | |
6654 | } | |
6655 | } | |
6656 | } | |
6657 | ||
6658 | ||
23a96c77 | 6659 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 6660 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
6661 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
6662 | size of the text displayed. A3 and A4 are not used. Value is what | |
6663 | resize_mini_window returns. */ | |
23a96c77 GM |
6664 | |
6665 | static int | |
6d004fea | 6666 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 6667 | EMACS_INT a1; |
6d004fea | 6668 | Lisp_Object exactly; |
23dd2d97 | 6669 | EMACS_INT a3, a4; |
23a96c77 | 6670 | { |
6d004fea | 6671 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
6672 | } |
6673 | ||
6674 | ||
92a90e89 GM |
6675 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
6676 | means size the window exactly to the size needed. Otherwise, it's | |
6677 | only enlarged until W's buffer is empty. Value is non-zero if | |
4b41cebb | 6678 | the window height has been changed. */ |
c6e89d6c | 6679 | |
9472f927 | 6680 | int |
92a90e89 | 6681 | resize_mini_window (w, exact_p) |
c6e89d6c | 6682 | struct window *w; |
92a90e89 | 6683 | int exact_p; |
c6e89d6c GM |
6684 | { |
6685 | struct frame *f = XFRAME (w->frame); | |
6686 | int window_height_changed_p = 0; | |
6687 | ||
6688 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 6689 | |
2913a9c0 GM |
6690 | /* Don't resize windows while redisplaying a window; it would |
6691 | confuse redisplay functions when the size of the window they are | |
6692 | displaying changes from under them. Such a resizing can happen, | |
6693 | for instance, when which-func prints a long message while | |
6694 | we are running fontification-functions. We're running these | |
6695 | functions with safe_call which binds inhibit-redisplay to t. */ | |
6696 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 | 6697 | return 0; |
2311178e | 6698 | |
97cafc0f | 6699 | /* Nil means don't try to resize. */ |
6422c1d7 | 6700 | if (NILP (Vresize_mini_windows) |
00f6d59e | 6701 | || (FRAME_X_P (f) && f->output_data.x == NULL)) |
97cafc0f | 6702 | return 0; |
2311178e | 6703 | |
c6e89d6c GM |
6704 | if (!FRAME_MINIBUF_ONLY_P (f)) |
6705 | { | |
6706 | struct it it; | |
dd2eb166 GM |
6707 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
6708 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
6709 | int height, max_height; | |
6710 | int unit = CANON_Y_UNIT (f); | |
6711 | struct text_pos start; | |
1bfdbe43 GM |
6712 | struct buffer *old_current_buffer = NULL; |
6713 | ||
6714 | if (current_buffer != XBUFFER (w->buffer)) | |
6715 | { | |
6716 | old_current_buffer = current_buffer; | |
6717 | set_buffer_internal (XBUFFER (w->buffer)); | |
6718 | } | |
9142dd5b | 6719 | |
c6e89d6c | 6720 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 6721 | |
dd2eb166 GM |
6722 | /* Compute the max. number of lines specified by the user. */ |
6723 | if (FLOATP (Vmax_mini_window_height)) | |
18f9986a | 6724 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_HEIGHT (f); |
dd2eb166 GM |
6725 | else if (INTEGERP (Vmax_mini_window_height)) |
6726 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
6727 | else |
6728 | max_height = total_height / 4; | |
2311178e | 6729 | |
4b41cebb | 6730 | /* Correct that max. height if it's bogus. */ |
dd2eb166 GM |
6731 | max_height = max (1, max_height); |
6732 | max_height = min (total_height, max_height); | |
2311178e | 6733 | |
dd2eb166 | 6734 | /* Find out the height of the text in the window. */ |
ad4f174e GM |
6735 | if (it.truncate_lines_p) |
6736 | height = 1; | |
55b064bd | 6737 | else |
ad4f174e GM |
6738 | { |
6739 | last_height = 0; | |
6740 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
6741 | if (it.max_ascent == 0 && it.max_descent == 0) | |
6742 | height = it.current_y + last_height; | |
6743 | else | |
6744 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 6745 | height -= it.extra_line_spacing; |
ad4f174e GM |
6746 | height = (height + unit - 1) / unit; |
6747 | } | |
2311178e | 6748 | |
dd2eb166 GM |
6749 | /* Compute a suitable window start. */ |
6750 | if (height > max_height) | |
6751 | { | |
6752 | height = max_height; | |
6753 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
6754 | move_it_vertically_backward (&it, (height - 1) * unit); | |
6755 | start = it.current.pos; | |
6756 | } | |
6757 | else | |
6758 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
6759 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 6760 | |
6422c1d7 | 6761 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 6762 | { |
6422c1d7 GM |
6763 | /* Let it grow only, until we display an empty message, in which |
6764 | case the window shrinks again. */ | |
6765 | if (height > XFASTINT (w->height)) | |
6766 | { | |
6767 | int old_height = XFASTINT (w->height); | |
6768 | freeze_window_starts (f, 1); | |
6769 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6770 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6771 | } | |
6772 | else if (height < XFASTINT (w->height) | |
6773 | && (exact_p || BEGV == ZV)) | |
6774 | { | |
6775 | int old_height = XFASTINT (w->height); | |
6776 | freeze_window_starts (f, 0); | |
6777 | shrink_mini_window (w); | |
6778 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6779 | } | |
da448723 | 6780 | } |
2311178e | 6781 | else |
da448723 | 6782 | { |
6422c1d7 GM |
6783 | /* Always resize to exact size needed. */ |
6784 | if (height > XFASTINT (w->height)) | |
6785 | { | |
6786 | int old_height = XFASTINT (w->height); | |
6787 | freeze_window_starts (f, 1); | |
6788 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6789 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6790 | } | |
6791 | else if (height < XFASTINT (w->height)) | |
6792 | { | |
6793 | int old_height = XFASTINT (w->height); | |
6794 | freeze_window_starts (f, 0); | |
6795 | shrink_mini_window (w); | |
6796 | ||
6797 | if (height) | |
6798 | { | |
6799 | freeze_window_starts (f, 1); | |
6800 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6801 | } | |
2311178e | 6802 | |
6422c1d7 GM |
6803 | window_height_changed_p = XFASTINT (w->height) != old_height; |
6804 | } | |
9142dd5b | 6805 | } |
1bfdbe43 GM |
6806 | |
6807 | if (old_current_buffer) | |
6808 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
6809 | } |
6810 | ||
6811 | return window_height_changed_p; | |
6812 | } | |
6813 | ||
6814 | ||
6815 | /* Value is the current message, a string, or nil if there is no | |
6816 | current message. */ | |
6817 | ||
6818 | Lisp_Object | |
6819 | current_message () | |
6820 | { | |
6821 | Lisp_Object msg; | |
6822 | ||
6823 | if (NILP (echo_area_buffer[0])) | |
6824 | msg = Qnil; | |
6825 | else | |
6826 | { | |
23a96c77 | 6827 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 6828 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
6829 | if (NILP (msg)) |
6830 | echo_area_buffer[0] = Qnil; | |
6831 | } | |
2311178e | 6832 | |
c6e89d6c GM |
6833 | return msg; |
6834 | } | |
6835 | ||
6836 | ||
6837 | static int | |
23a96c77 | 6838 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6839 | EMACS_INT a1; |
6840 | Lisp_Object a2; | |
6841 | EMACS_INT a3, a4; | |
c6e89d6c | 6842 | { |
23a96c77 | 6843 | Lisp_Object *msg = (Lisp_Object *) a1; |
2311178e | 6844 | |
c6e89d6c GM |
6845 | if (Z > BEG) |
6846 | *msg = make_buffer_string (BEG, Z, 1); | |
6847 | else | |
6848 | *msg = Qnil; | |
6849 | return 0; | |
6850 | } | |
6851 | ||
6852 | ||
6853 | /* Push the current message on Vmessage_stack for later restauration | |
6854 | by restore_message. Value is non-zero if the current message isn't | |
6855 | empty. This is a relatively infrequent operation, so it's not | |
6856 | worth optimizing. */ | |
6857 | ||
6858 | int | |
6859 | push_message () | |
6860 | { | |
6861 | Lisp_Object msg; | |
6862 | msg = current_message (); | |
6863 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
6864 | return STRINGP (msg); | |
6865 | } | |
6866 | ||
6867 | ||
6868 | /* Restore message display from the top of Vmessage_stack. */ | |
6869 | ||
6870 | void | |
6871 | restore_message () | |
6872 | { | |
6873 | Lisp_Object msg; | |
2311178e | 6874 | |
c6e89d6c GM |
6875 | xassert (CONSP (Vmessage_stack)); |
6876 | msg = XCAR (Vmessage_stack); | |
6877 | if (STRINGP (msg)) | |
d5db4077 | 6878 | message3_nolog (msg, SBYTES (msg), STRING_MULTIBYTE (msg)); |
c6e89d6c GM |
6879 | else |
6880 | message3_nolog (msg, 0, 0); | |
6881 | } | |
6882 | ||
6883 | ||
37d66095 RS |
6884 | /* Handler for record_unwind_protect calling pop_message. */ |
6885 | ||
6886 | Lisp_Object | |
6887 | pop_message_unwind (dummy) | |
6888 | Lisp_Object dummy; | |
6889 | { | |
6890 | pop_message (); | |
6891 | return Qnil; | |
6892 | } | |
6893 | ||
c6e89d6c GM |
6894 | /* Pop the top-most entry off Vmessage_stack. */ |
6895 | ||
6896 | void | |
6897 | pop_message () | |
6898 | { | |
6899 | xassert (CONSP (Vmessage_stack)); | |
6900 | Vmessage_stack = XCDR (Vmessage_stack); | |
6901 | } | |
6902 | ||
6903 | ||
6904 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
6905 | exits. If the stack is not empty, we have a missing pop_message | |
6906 | somewhere. */ | |
6907 | ||
6908 | void | |
6909 | check_message_stack () | |
6910 | { | |
6911 | if (!NILP (Vmessage_stack)) | |
6912 | abort (); | |
6913 | } | |
6914 | ||
6915 | ||
6916 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
6917 | time we display it---but don't redisplay it now. */ | |
6918 | ||
6919 | void | |
6920 | truncate_echo_area (nchars) | |
6921 | int nchars; | |
6922 | { | |
6923 | if (nchars == 0) | |
6924 | echo_area_buffer[0] = Qnil; | |
6925 | /* A null message buffer means that the frame hasn't really been | |
6926 | initialized yet. Error messages get reported properly by | |
6927 | cmd_error, so this must be just an informative message; toss it. */ | |
6928 | else if (!noninteractive | |
6929 | && INTERACTIVE | |
c6e89d6c | 6930 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
6931 | { |
6932 | struct frame *sf = SELECTED_FRAME (); | |
6933 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 6934 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 6935 | } |
c6e89d6c GM |
6936 | } |
6937 | ||
6938 | ||
6939 | /* Helper function for truncate_echo_area. Truncate the current | |
6940 | message to at most NCHARS characters. */ | |
6941 | ||
6942 | static int | |
23a96c77 | 6943 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
6944 | EMACS_INT nchars; |
6945 | Lisp_Object a2; | |
6946 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6947 | { |
6948 | if (BEG + nchars < Z) | |
6949 | del_range (BEG + nchars, Z); | |
6950 | if (Z == BEG) | |
6951 | echo_area_buffer[0] = Qnil; | |
6952 | return 0; | |
6953 | } | |
6954 | ||
6955 | ||
6956 | /* Set the current message to a substring of S or STRING. | |
6957 | ||
6958 | If STRING is a Lisp string, set the message to the first NBYTES | |
6959 | bytes from STRING. NBYTES zero means use the whole string. If | |
6960 | STRING is multibyte, the message will be displayed multibyte. | |
6961 | ||
6962 | If S is not null, set the message to the first LEN bytes of S. LEN | |
6963 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
6964 | multibyte. Display the message multibyte in that case. */ | |
6965 | ||
6966 | void | |
6967 | set_message (s, string, nbytes, multibyte_p) | |
50f80c2f | 6968 | const char *s; |
c6e89d6c | 6969 | Lisp_Object string; |
e3383b6f | 6970 | int nbytes, multibyte_p; |
c6e89d6c GM |
6971 | { |
6972 | message_enable_multibyte | |
6973 | = ((s && multibyte_p) | |
6974 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
2311178e | 6975 | |
23a96c77 GM |
6976 | with_echo_area_buffer (0, -1, set_message_1, |
6977 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c | 6978 | message_buf_print = 0; |
21fdfb65 | 6979 | help_echo_showing_p = 0; |
c6e89d6c GM |
6980 | } |
6981 | ||
6982 | ||
6983 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
6984 | as there, with A1 corresponding to S and A2 corresponding to STRING |
6985 | This function is called with the echo area buffer being | |
c6e89d6c GM |
6986 | current. */ |
6987 | ||
6988 | static int | |
23a96c77 | 6989 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
6990 | EMACS_INT a1; |
6991 | Lisp_Object a2; | |
6992 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 6993 | { |
50f80c2f | 6994 | const char *s = (const char *) a1; |
23dd2d97 | 6995 | Lisp_Object string = a2; |
2311178e | 6996 | |
c6e89d6c | 6997 | xassert (BEG == Z); |
2311178e | 6998 | |
c6e89d6c GM |
6999 | /* Change multibyteness of the echo buffer appropriately. */ |
7000 | if (message_enable_multibyte | |
7001 | != !NILP (current_buffer->enable_multibyte_characters)) | |
7002 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
7003 | ||
ad4f174e | 7004 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
2311178e | 7005 | |
c6e89d6c GM |
7006 | /* Insert new message at BEG. */ |
7007 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
7008 | ||
7009 | if (STRINGP (string)) | |
7010 | { | |
7011 | int nchars; | |
2311178e | 7012 | |
c6e89d6c | 7013 | if (nbytes == 0) |
2051c264 | 7014 | nbytes = SBYTES (string); |
c6e89d6c | 7015 | nchars = string_byte_to_char (string, nbytes); |
2311178e | 7016 | |
c6e89d6c GM |
7017 | /* This function takes care of single/multibyte conversion. We |
7018 | just have to ensure that the echo area buffer has the right | |
7019 | setting of enable_multibyte_characters. */ | |
7020 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
7021 | } | |
7022 | else if (s) | |
7023 | { | |
7024 | if (nbytes == 0) | |
7025 | nbytes = strlen (s); | |
2311178e | 7026 | |
c6e89d6c GM |
7027 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) |
7028 | { | |
7029 | /* Convert from multi-byte to single-byte. */ | |
7030 | int i, c, n; | |
7031 | unsigned char work[1]; | |
2311178e | 7032 | |
c6e89d6c GM |
7033 | /* Convert a multibyte string to single-byte. */ |
7034 | for (i = 0; i < nbytes; i += n) | |
7035 | { | |
7036 | c = string_char_and_length (s + i, nbytes - i, &n); | |
7037 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
7038 | ? c | |
7039 | : multibyte_char_to_unibyte (c, Qnil)); | |
7040 | insert_1_both (work, 1, 1, 1, 0, 0); | |
7041 | } | |
7042 | } | |
7043 | else if (!multibyte_p | |
7044 | && !NILP (current_buffer->enable_multibyte_characters)) | |
7045 | { | |
7046 | /* Convert from single-byte to multi-byte. */ | |
7047 | int i, c, n; | |
50f80c2f | 7048 | const unsigned char *msg = (const unsigned char *) s; |
260a86a0 | 7049 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2311178e | 7050 | |
c6e89d6c GM |
7051 | /* Convert a single-byte string to multibyte. */ |
7052 | for (i = 0; i < nbytes; i++) | |
7053 | { | |
7054 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
7055 | n = CHAR_STRING (c, str); |
7056 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
7057 | } |
7058 | } | |
7059 | else | |
7060 | insert_1 (s, nbytes, 1, 0, 0); | |
7061 | } | |
7062 | ||
7063 | return 0; | |
7064 | } | |
7065 | ||
7066 | ||
7067 | /* Clear messages. CURRENT_P non-zero means clear the current | |
7068 | message. LAST_DISPLAYED_P non-zero means clear the message | |
7069 | last displayed. */ | |
7070 | ||
7071 | void | |
7072 | clear_message (current_p, last_displayed_p) | |
7073 | int current_p, last_displayed_p; | |
7074 | { | |
7075 | if (current_p) | |
6e019995 GM |
7076 | { |
7077 | echo_area_buffer[0] = Qnil; | |
7078 | message_cleared_p = 1; | |
7079 | } | |
2311178e | 7080 | |
c6e89d6c GM |
7081 | if (last_displayed_p) |
7082 | echo_area_buffer[1] = Qnil; | |
2311178e | 7083 | |
c6e89d6c GM |
7084 | message_buf_print = 0; |
7085 | } | |
7086 | ||
7087 | /* Clear garbaged frames. | |
7088 | ||
7089 | This function is used where the old redisplay called | |
7090 | redraw_garbaged_frames which in turn called redraw_frame which in | |
7091 | turn called clear_frame. The call to clear_frame was a source of | |
7092 | flickering. I believe a clear_frame is not necessary. It should | |
7093 | suffice in the new redisplay to invalidate all current matrices, | |
7094 | and ensure a complete redisplay of all windows. */ | |
7095 | ||
7096 | static void | |
7097 | clear_garbaged_frames () | |
7098 | { | |
5f5c8ee5 GM |
7099 | if (frame_garbaged) |
7100 | { | |
5f5c8ee5 | 7101 | Lisp_Object tail, frame; |
5fb96e96 | 7102 | int changed_count = 0; |
2311178e | 7103 | |
5f5c8ee5 GM |
7104 | FOR_EACH_FRAME (tail, frame) |
7105 | { | |
7106 | struct frame *f = XFRAME (frame); | |
2311178e | 7107 | |
5f5c8ee5 GM |
7108 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) |
7109 | { | |
6bb95882 | 7110 | if (f->resized_p) |
573e57f1 | 7111 | Fredraw_frame (frame); |
5f5c8ee5 | 7112 | clear_current_matrices (f); |
5fb96e96 | 7113 | changed_count++; |
5f5c8ee5 | 7114 | f->garbaged = 0; |
6bb95882 | 7115 | f->resized_p = 0; |
5f5c8ee5 GM |
7116 | } |
7117 | } | |
7118 | ||
7119 | frame_garbaged = 0; | |
5fb96e96 RS |
7120 | if (changed_count) |
7121 | ++windows_or_buffers_changed; | |
5f5c8ee5 | 7122 | } |
c6e89d6c | 7123 | } |
5f5c8ee5 | 7124 | |
5f5c8ee5 | 7125 | |
886bd6f2 GM |
7126 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
7127 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 7128 | mini-windows height has been changed. */ |
5f5c8ee5 | 7129 | |
c6e89d6c GM |
7130 | static int |
7131 | echo_area_display (update_frame_p) | |
7132 | int update_frame_p; | |
7133 | { | |
7134 | Lisp_Object mini_window; | |
7135 | struct window *w; | |
7136 | struct frame *f; | |
7137 | int window_height_changed_p = 0; | |
886bd6f2 | 7138 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7139 | |
886bd6f2 | 7140 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7141 | w = XWINDOW (mini_window); |
7142 | f = XFRAME (WINDOW_FRAME (w)); | |
7143 | ||
7144 | /* Don't display if frame is invisible or not yet initialized. */ | |
7145 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
7146 | return 0; | |
5f5c8ee5 | 7147 | |
1a578e9b | 7148 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
e0f712ba | 7149 | #ifndef MAC_OS8 |
1ab3e082 | 7150 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
7151 | /* When Emacs starts, selected_frame may be a visible terminal |
7152 | frame, even if we run under a window system. If we let this | |
7153 | through, a message would be displayed on the terminal. */ | |
2311178e | 7154 | if (EQ (selected_frame, Vterminal_frame) |
622e3754 | 7155 | && !NILP (Vwindow_system)) |
c6e89d6c | 7156 | return 0; |
1ab3e082 | 7157 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 7158 | #endif |
c6e89d6c GM |
7159 | |
7160 | /* Redraw garbaged frames. */ | |
7161 | if (frame_garbaged) | |
7162 | clear_garbaged_frames (); | |
7163 | ||
7164 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
7165 | { | |
7166 | echo_area_window = mini_window; | |
7167 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 7168 | w->must_be_updated_p = 1; |
c59c668a | 7169 | |
d4358b37 GM |
7170 | /* Update the display, unless called from redisplay_internal. |
7171 | Also don't update the screen during redisplay itself. The | |
7172 | update will happen at the end of redisplay, and an update | |
7173 | here could cause confusion. */ | |
7174 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 7175 | { |
715e84c9 | 7176 | int n = 0; |
edc68111 | 7177 | |
715e84c9 GM |
7178 | /* If the display update has been interrupted by pending |
7179 | input, update mode lines in the frame. Due to the | |
7180 | pending input, it might have been that redisplay hasn't | |
7181 | been called, so that mode lines above the echo area are | |
7182 | garbaged. This looks odd, so we prevent it here. */ | |
7183 | if (!display_completed) | |
7184 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
2311178e | 7185 | |
8af1308e GM |
7186 | if (window_height_changed_p |
7187 | /* Don't do this if Emacs is shutting down. Redisplay | |
7188 | needs to run hooks. */ | |
7189 | && !NILP (Vrun_hooks)) | |
c59c668a | 7190 | { |
c06017fb GM |
7191 | /* Must update other windows. Likewise as in other |
7192 | cases, don't let this update be interrupted by | |
7193 | pending input. */ | |
331379bf | 7194 | int count = SPECPDL_INDEX (); |
c06017fb | 7195 | specbind (Qredisplay_dont_pause, Qt); |
edc68111 | 7196 | windows_or_buffers_changed = 1; |
c59c668a | 7197 | redisplay_internal (0); |
c06017fb | 7198 | unbind_to (count, Qnil); |
c59c668a | 7199 | } |
715e84c9 | 7200 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 7201 | { |
edc68111 | 7202 | /* Window configuration is the same as before. |
715e84c9 GM |
7203 | Can do with a display update of the echo area, |
7204 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
7205 | update_single_window (w, 1); |
7206 | rif->flush_display (f); | |
7207 | } | |
7208 | else | |
7209 | update_frame (f, 1, 1); | |
31b6671b GM |
7210 | |
7211 | /* If cursor is in the echo area, make sure that the next | |
7212 | redisplay displays the minibuffer, so that the cursor will | |
7213 | be replaced with what the minibuffer wants. */ | |
7214 | if (cursor_in_echo_area) | |
7215 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
7216 | } |
7217 | } | |
7218 | else if (!EQ (mini_window, selected_window)) | |
7219 | windows_or_buffers_changed++; | |
c59c668a GM |
7220 | |
7221 | /* Last displayed message is now the current message. */ | |
dd2eb166 | 7222 | echo_area_buffer[1] = echo_area_buffer[0]; |
2311178e | 7223 | |
5f5c8ee5 GM |
7224 | /* Prevent redisplay optimization in redisplay_internal by resetting |
7225 | this_line_start_pos. This is done because the mini-buffer now | |
7226 | displays the message instead of its buffer text. */ | |
7227 | if (EQ (mini_window, selected_window)) | |
7228 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
7229 | |
7230 | return window_height_changed_p; | |
5f5c8ee5 GM |
7231 | } |
7232 | ||
7233 | ||
7234 | \f | |
7235 | /*********************************************************************** | |
7236 | Frame Titles | |
7237 | ***********************************************************************/ | |
7238 | ||
7239 | ||
8143e6ab KS |
7240 | /* The frame title buffering code is also used by Fformat_mode_line. |
7241 | So it is not conditioned by HAVE_WINDOW_SYSTEM. */ | |
5f5c8ee5 GM |
7242 | |
7243 | /* A buffer for constructing frame titles in it; allocated from the | |
7244 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
7245 | ||
7246 | static char *frame_title_buf; | |
7247 | ||
7248 | /* The buffer's end, and a current output position in it. */ | |
7249 | ||
7250 | static char *frame_title_buf_end; | |
7251 | static char *frame_title_ptr; | |
7252 | ||
7253 | ||
7254 | /* Store a single character C for the frame title in frame_title_buf. | |
7255 | Re-allocate frame_title_buf if necessary. */ | |
7256 | ||
7257 | static void | |
5d15cc8f DL |
7258 | #ifdef PROTOTYPES |
7259 | store_frame_title_char (char c) | |
7260 | #else | |
5f5c8ee5 GM |
7261 | store_frame_title_char (c) |
7262 | char c; | |
5d15cc8f | 7263 | #endif |
5f5c8ee5 GM |
7264 | { |
7265 | /* If output position has reached the end of the allocated buffer, | |
7266 | double the buffer's size. */ | |
7267 | if (frame_title_ptr == frame_title_buf_end) | |
7268 | { | |
7269 | int len = frame_title_ptr - frame_title_buf; | |
7270 | int new_size = 2 * len * sizeof *frame_title_buf; | |
7271 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
7272 | frame_title_buf_end = frame_title_buf + new_size; | |
7273 | frame_title_ptr = frame_title_buf + len; | |
7274 | } | |
7275 | ||
7276 | *frame_title_ptr++ = c; | |
7277 | } | |
7278 | ||
7279 | ||
7280 | /* Store part of a frame title in frame_title_buf, beginning at | |
d26b89b8 KH |
7281 | frame_title_ptr. STR is the string to store. Do not copy |
7282 | characters that yield more columns than PRECISION; PRECISION <= 0 | |
7283 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
7284 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
7285 | pad. Called from display_mode_element when it is used to build a | |
7286 | frame title. */ | |
5f5c8ee5 GM |
7287 | |
7288 | static int | |
7289 | store_frame_title (str, field_width, precision) | |
50f80c2f | 7290 | const unsigned char *str; |
5f5c8ee5 GM |
7291 | int field_width, precision; |
7292 | { | |
7293 | int n = 0; | |
3b552d56 | 7294 | int dummy, nbytes; |
5f5c8ee5 GM |
7295 | |
7296 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 KH |
7297 | nbytes = strlen (str); |
7298 | n+= c_string_width (str, nbytes, precision, &dummy, &nbytes); | |
7299 | while (nbytes--) | |
7300 | store_frame_title_char (*str++); | |
5f5c8ee5 GM |
7301 | |
7302 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
7303 | while (field_width > 0 | |
7304 | && n < field_width) | |
7305 | { | |
7306 | store_frame_title_char (' '); | |
7307 | ++n; | |
7308 | } | |
7309 | ||
7310 | return n; | |
7311 | } | |
7312 | ||
8143e6ab | 7313 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7314 | |
7315 | /* Set the title of FRAME, if it has changed. The title format is | |
7316 | Vicon_title_format if FRAME is iconified, otherwise it is | |
7317 | frame_title_format. */ | |
7318 | ||
7319 | static void | |
7320 | x_consider_frame_title (frame) | |
7321 | Lisp_Object frame; | |
7322 | { | |
7323 | struct frame *f = XFRAME (frame); | |
7324 | ||
7325 | if (FRAME_WINDOW_P (f) | |
7326 | || FRAME_MINIBUF_ONLY_P (f) | |
7327 | || f->explicit_name) | |
7328 | { | |
7329 | /* Do we have more than one visible frame on this X display? */ | |
7330 | Lisp_Object tail; | |
7331 | Lisp_Object fmt; | |
7332 | struct buffer *obuf; | |
7333 | int len; | |
7334 | struct it it; | |
7335 | ||
9472f927 | 7336 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 7337 | { |
74779f52 JR |
7338 | Lisp_Object other_frame = XCAR (tail); |
7339 | struct frame *tf = XFRAME (other_frame); | |
5f5c8ee5 | 7340 | |
2311178e | 7341 | if (tf != f |
5f5c8ee5 GM |
7342 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) |
7343 | && !FRAME_MINIBUF_ONLY_P (tf) | |
74779f52 | 7344 | && !EQ (other_frame, tip_frame) |
5f5c8ee5 GM |
7345 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
7346 | break; | |
7347 | } | |
7348 | ||
7349 | /* Set global variable indicating that multiple frames exist. */ | |
7350 | multiple_frames = CONSP (tail); | |
7351 | ||
7352 | /* Switch to the buffer of selected window of the frame. Set up | |
7353 | frame_title_ptr so that display_mode_element will output into it; | |
7354 | then display the title. */ | |
7355 | obuf = current_buffer; | |
bb336f8d | 7356 | set_buffer_internal_1 (XBUFFER (XWINDOW (f->selected_window)->buffer)); |
5f5c8ee5 GM |
7357 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; |
7358 | frame_title_ptr = frame_title_buf; | |
7359 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
7360 | NULL, DEFAULT_FACE_ID); | |
c53a1624 | 7361 | display_mode_element (&it, 0, -1, -1, fmt, Qnil, 0); |
d26b89b8 | 7362 | len = frame_title_ptr - frame_title_buf; |
5f5c8ee5 | 7363 | frame_title_ptr = NULL; |
bb336f8d | 7364 | set_buffer_internal_1 (obuf); |
5f5c8ee5 GM |
7365 | |
7366 | /* Set the title only if it's changed. This avoids consing in | |
7367 | the common case where it hasn't. (If it turns out that we've | |
7368 | already wasted too much time by walking through the list with | |
7369 | display_mode_element, then we might need to optimize at a | |
7370 | higher level than this.) */ | |
2311178e | 7371 | if (! STRINGP (f->name) |
2051c264 GM |
7372 | || SBYTES (f->name) != len |
7373 | || bcmp (frame_title_buf, SDATA (f->name), len) != 0) | |
5f5c8ee5 GM |
7374 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); |
7375 | } | |
7376 | } | |
7377 | ||
5f5c8ee5 GM |
7378 | #endif /* not HAVE_WINDOW_SYSTEM */ |
7379 | ||
7380 | ||
7381 | ||
7382 | \f | |
7383 | /*********************************************************************** | |
7384 | Menu Bars | |
7385 | ***********************************************************************/ | |
7386 | ||
7387 | ||
7388 | /* Prepare for redisplay by updating menu-bar item lists when | |
7389 | appropriate. This can call eval. */ | |
7390 | ||
7391 | void | |
7392 | prepare_menu_bars () | |
7393 | { | |
7394 | int all_windows; | |
7395 | struct gcpro gcpro1, gcpro2; | |
7396 | struct frame *f; | |
6b5c4794 | 7397 | Lisp_Object tooltip_frame; |
5f5c8ee5 | 7398 | |
86ffe5cd | 7399 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7400 | tooltip_frame = tip_frame; |
7401 | #else | |
6b5c4794 | 7402 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
7403 | #endif |
7404 | ||
7405 | /* Update all frame titles based on their buffer names, etc. We do | |
7406 | this before the menu bars so that the buffer-menu will show the | |
7407 | up-to-date frame titles. */ | |
7408 | #ifdef HAVE_WINDOW_SYSTEM | |
7409 | if (windows_or_buffers_changed || update_mode_lines) | |
7410 | { | |
7411 | Lisp_Object tail, frame; | |
7412 | ||
7413 | FOR_EACH_FRAME (tail, frame) | |
7414 | { | |
7415 | f = XFRAME (frame); | |
6b5c4794 | 7416 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
7417 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
7418 | x_consider_frame_title (frame); | |
7419 | } | |
7420 | } | |
7421 | #endif /* HAVE_WINDOW_SYSTEM */ | |
7422 | ||
7423 | /* Update the menu bar item lists, if appropriate. This has to be | |
7424 | done before any actual redisplay or generation of display lines. */ | |
2311178e | 7425 | all_windows = (update_mode_lines |
5f5c8ee5 GM |
7426 | || buffer_shared > 1 |
7427 | || windows_or_buffers_changed); | |
7428 | if (all_windows) | |
7429 | { | |
7430 | Lisp_Object tail, frame; | |
331379bf | 7431 | int count = SPECPDL_INDEX (); |
5f5c8ee5 GM |
7432 | |
7433 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7434 | ||
7435 | FOR_EACH_FRAME (tail, frame) | |
7436 | { | |
7437 | f = XFRAME (frame); | |
7438 | ||
7439 | /* Ignore tooltip frame. */ | |
6b5c4794 | 7440 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 | 7441 | continue; |
2311178e | 7442 | |
5f5c8ee5 GM |
7443 | /* If a window on this frame changed size, report that to |
7444 | the user and clear the size-change flag. */ | |
7445 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
7446 | { | |
7447 | Lisp_Object functions; | |
2311178e | 7448 | |
5f5c8ee5 GM |
7449 | /* Clear flag first in case we get an error below. */ |
7450 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
7451 | functions = Vwindow_size_change_functions; | |
7452 | GCPRO2 (tail, functions); | |
2311178e | 7453 | |
5f5c8ee5 GM |
7454 | while (CONSP (functions)) |
7455 | { | |
7456 | call1 (XCAR (functions), frame); | |
7457 | functions = XCDR (functions); | |
7458 | } | |
7459 | UNGCPRO; | |
7460 | } | |
2311178e | 7461 | |
5f5c8ee5 GM |
7462 | GCPRO1 (tail); |
7463 | update_menu_bar (f, 0); | |
7464 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 7465 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
7466 | #endif |
7467 | UNGCPRO; | |
7468 | } | |
7469 | ||
7470 | unbind_to (count, Qnil); | |
7471 | } | |
7472 | else | |
7473 | { | |
886bd6f2 GM |
7474 | struct frame *sf = SELECTED_FRAME (); |
7475 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 7476 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 7477 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
7478 | #endif |
7479 | } | |
7480 | ||
7481 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
7482 | pending_menu_activation is not defined. */ | |
7483 | #ifdef USE_X_TOOLKIT | |
7484 | pending_menu_activation = 0; | |
7485 | #endif | |
7486 | } | |
7487 | ||
7488 | ||
7489 | /* Update the menu bar item list for frame F. This has to be done | |
7490 | before we start to fill in any display lines, because it can call | |
7491 | eval. | |
7492 | ||
7493 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
7494 | ||
7495 | static void | |
7496 | update_menu_bar (f, save_match_data) | |
7497 | struct frame *f; | |
7498 | int save_match_data; | |
7499 | { | |
7500 | Lisp_Object window; | |
7501 | register struct window *w; | |
7502 | ||
e1477f43 GM |
7503 | /* If called recursively during a menu update, do nothing. This can |
7504 | happen when, for instance, an activate-menubar-hook causes a | |
7505 | redisplay. */ | |
7506 | if (inhibit_menubar_update) | |
7507 | return; | |
7508 | ||
5f5c8ee5 GM |
7509 | window = FRAME_SELECTED_WINDOW (f); |
7510 | w = XWINDOW (window); | |
2311178e | 7511 | |
40ae145b | 7512 | #if 0 /* The if statement below this if statement used to include the |
a5f08374 RS |
7513 | condition !NILP (w->update_mode_line), rather than using |
7514 | update_mode_lines directly, and this if statement may have | |
7515 | been added to make that condition work. Now the if | |
2311178e | 7516 | statement below matches its comment, this isn't needed. */ |
5f5c8ee5 GM |
7517 | if (update_mode_lines) |
7518 | w->update_mode_line = Qt; | |
a5f08374 | 7519 | #endif |
5f5c8ee5 GM |
7520 | |
7521 | if (FRAME_WINDOW_P (f) | |
7522 | ? | |
488dd4c4 JD |
7523 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
7524 | || defined (USE_GTK) | |
2311178e | 7525 | FRAME_EXTERNAL_MENU_BAR (f) |
5f5c8ee5 GM |
7526 | #else |
7527 | FRAME_MENU_BAR_LINES (f) > 0 | |
7528 | #endif | |
7529 | : FRAME_MENU_BAR_LINES (f) > 0) | |
7530 | { | |
7531 | /* If the user has switched buffers or windows, we need to | |
7532 | recompute to reflect the new bindings. But we'll | |
7533 | recompute when update_mode_lines is set too; that means | |
7534 | that people can use force-mode-line-update to request | |
7535 | that the menu bar be recomputed. The adverse effect on | |
7536 | the rest of the redisplay algorithm is about the same as | |
7537 | windows_or_buffers_changed anyway. */ | |
7538 | if (windows_or_buffers_changed | |
a5f08374 RS |
7539 | /* This used to test w->update_mode_line, but we believe |
7540 | there is no need to recompute the menu in that case. */ | |
7541 | || update_mode_lines | |
5f5c8ee5 GM |
7542 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
7543 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7544 | != !NILP (w->last_had_star)) | |
7545 | || ((!NILP (Vtransient_mark_mode) | |
7546 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7547 | != !NILP (w->region_showing))) | |
7548 | { | |
7549 | struct buffer *prev = current_buffer; | |
331379bf | 7550 | int count = SPECPDL_INDEX (); |
5f5c8ee5 | 7551 | |
e1477f43 GM |
7552 | specbind (Qinhibit_menubar_update, Qt); |
7553 | ||
5f5c8ee5 GM |
7554 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7555 | if (save_match_data) | |
7556 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7557 | if (NILP (Voverriding_local_map_menu_flag)) | |
7558 | { | |
7559 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7560 | specbind (Qoverriding_local_map, Qnil); | |
7561 | } | |
7562 | ||
7563 | /* Run the Lucid hook. */ | |
65048e97 | 7564 | safe_run_hooks (Qactivate_menubar_hook); |
2311178e | 7565 | |
5f5c8ee5 GM |
7566 | /* If it has changed current-menubar from previous value, |
7567 | really recompute the menu-bar from the value. */ | |
7568 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
7569 | call0 (Qrecompute_lucid_menubar); | |
2311178e | 7570 | |
5f5c8ee5 GM |
7571 | safe_run_hooks (Qmenu_bar_update_hook); |
7572 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
2311178e | 7573 | |
5f5c8ee5 | 7574 | /* Redisplay the menu bar in case we changed it. */ |
488dd4c4 JD |
7575 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
7576 | || defined (USE_GTK) | |
1a578e9b | 7577 | if (FRAME_WINDOW_P (f) |
e0f712ba | 7578 | #if defined (MAC_OS) |
1a578e9b AC |
7579 | /* All frames on Mac OS share the same menubar. So only the |
7580 | selected frame should be allowed to set it. */ | |
7581 | && f == SELECTED_FRAME () | |
7582 | #endif | |
7583 | ) | |
5f5c8ee5 GM |
7584 | set_frame_menubar (f, 0, 0); |
7585 | else | |
7586 | /* On a terminal screen, the menu bar is an ordinary screen | |
7587 | line, and this makes it get updated. */ | |
7588 | w->update_mode_line = Qt; | |
488dd4c4 | 7589 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
7590 | /* In the non-toolkit version, the menu bar is an ordinary screen |
7591 | line, and this makes it get updated. */ | |
7592 | w->update_mode_line = Qt; | |
488dd4c4 | 7593 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI || MAC_OS || USE_GTK) */ |
5f5c8ee5 GM |
7594 | |
7595 | unbind_to (count, Qnil); | |
7596 | set_buffer_internal_1 (prev); | |
7597 | } | |
7598 | } | |
7599 | } | |
7600 | ||
7601 | ||
7602 | \f | |
7603 | /*********************************************************************** | |
e037b9ec | 7604 | Tool-bars |
5f5c8ee5 GM |
7605 | ***********************************************************************/ |
7606 | ||
7607 | #ifdef HAVE_WINDOW_SYSTEM | |
7608 | ||
e037b9ec | 7609 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
7610 | before we start to fill in any display lines. Called from |
7611 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
7612 | and restore it here. */ | |
7613 | ||
7614 | static void | |
e037b9ec | 7615 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
7616 | struct frame *f; |
7617 | int save_match_data; | |
7618 | { | |
488dd4c4 JD |
7619 | #ifdef USE_GTK |
7620 | int do_update = FRAME_EXTERNAL_TOOL_BAR(f); | |
7621 | #else | |
7622 | int do_update = WINDOWP (f->tool_bar_window) | |
7623 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0; | |
7624 | #endif | |
7625 | ||
7626 | if (do_update) | |
5f5c8ee5 GM |
7627 | { |
7628 | Lisp_Object window; | |
7629 | struct window *w; | |
7630 | ||
7631 | window = FRAME_SELECTED_WINDOW (f); | |
7632 | w = XWINDOW (window); | |
2311178e | 7633 | |
5f5c8ee5 GM |
7634 | /* If the user has switched buffers or windows, we need to |
7635 | recompute to reflect the new bindings. But we'll | |
7636 | recompute when update_mode_lines is set too; that means | |
7637 | that people can use force-mode-line-update to request | |
7638 | that the menu bar be recomputed. The adverse effect on | |
7639 | the rest of the redisplay algorithm is about the same as | |
7640 | windows_or_buffers_changed anyway. */ | |
7641 | if (windows_or_buffers_changed | |
7642 | || !NILP (w->update_mode_line) | |
7643 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7644 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7645 | != !NILP (w->last_had_star)) | |
7646 | || ((!NILP (Vtransient_mark_mode) | |
7647 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7648 | != !NILP (w->region_showing))) | |
7649 | { | |
7650 | struct buffer *prev = current_buffer; | |
331379bf | 7651 | int count = SPECPDL_INDEX (); |
a2889657 | 7652 | |
5f5c8ee5 GM |
7653 | /* Set current_buffer to the buffer of the selected |
7654 | window of the frame, so that we get the right local | |
7655 | keymaps. */ | |
7656 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 7657 | |
5f5c8ee5 GM |
7658 | /* Save match data, if we must. */ |
7659 | if (save_match_data) | |
7660 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7661 | ||
7662 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
7663 | if (NILP (Voverriding_local_map_menu_flag)) | |
7664 | { | |
7665 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7666 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 7667 | } |
1f40cad2 | 7668 | |
e037b9ec | 7669 | /* Build desired tool-bar items from keymaps. */ |
7464726e GM |
7670 | f->tool_bar_items |
7671 | = tool_bar_items (f->tool_bar_items, &f->n_tool_bar_items); | |
2311178e | 7672 | |
e037b9ec | 7673 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
7674 | w->update_mode_line = Qt; |
7675 | ||
7676 | unbind_to (count, Qnil); | |
7677 | set_buffer_internal_1 (prev); | |
81d478f3 | 7678 | } |
a2889657 JB |
7679 | } |
7680 | } | |
7681 | ||
6c4429a5 | 7682 | |
e037b9ec | 7683 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 7684 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
7685 | been set up previously by calling prepare_menu_bars. */ |
7686 | ||
a2889657 | 7687 | static void |
e037b9ec | 7688 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 7689 | struct frame *f; |
a2889657 | 7690 | { |
a23887b9 | 7691 | int i, size, size_needed; |
5f5c8ee5 GM |
7692 | struct gcpro gcpro1, gcpro2, gcpro3; |
7693 | Lisp_Object image, plist, props; | |
a2889657 | 7694 | |
5f5c8ee5 GM |
7695 | image = plist = props = Qnil; |
7696 | GCPRO3 (image, plist, props); | |
a2889657 | 7697 | |
e037b9ec | 7698 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 | 7699 | Otherwise, make a new string. */ |
2311178e | 7700 | |
5f5c8ee5 | 7701 | /* The size of the string we might be able to reuse. */ |
e037b9ec | 7702 | size = (STRINGP (f->desired_tool_bar_string) |
2051c264 | 7703 | ? SCHARS (f->desired_tool_bar_string) |
5f5c8ee5 GM |
7704 | : 0); |
7705 | ||
b94c0d9c | 7706 | /* We need one space in the string for each image. */ |
a23887b9 | 7707 | size_needed = f->n_tool_bar_items; |
2311178e | 7708 | |
b94c0d9c | 7709 | /* Reuse f->desired_tool_bar_string, if possible. */ |
cb2ddc53 | 7710 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
7711 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
7712 | make_number (' ')); | |
5f5c8ee5 GM |
7713 | else |
7714 | { | |
7715 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
7716 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 7717 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7718 | } |
a2889657 | 7719 | |
5f5c8ee5 | 7720 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
7721 | put a `menu_item' property on tool-bar items with a value that |
7722 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 7723 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 7724 | { |
7464726e | 7725 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 7726 | |
e037b9ec GM |
7727 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
7728 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 7729 | int hmargin, vmargin, relief, idx, end; |
ecd01a0e | 7730 | extern Lisp_Object QCrelief, QCmargin, QCconversion, Qimage; |
5f5c8ee5 GM |
7731 | |
7732 | /* If image is a vector, choose the image according to the | |
7733 | button state. */ | |
e037b9ec | 7734 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
7735 | if (VECTORP (image)) |
7736 | { | |
5f5c8ee5 GM |
7737 | if (enabled_p) |
7738 | idx = (selected_p | |
e037b9ec GM |
7739 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
7740 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
7741 | else |
7742 | idx = (selected_p | |
e037b9ec GM |
7743 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
7744 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
2311178e | 7745 | |
37e4e482 GM |
7746 | xassert (ASIZE (image) >= idx); |
7747 | image = AREF (image, idx); | |
5f5c8ee5 | 7748 | } |
37e4e482 GM |
7749 | else |
7750 | idx = -1; | |
5f5c8ee5 GM |
7751 | |
7752 | /* Ignore invalid image specifications. */ | |
7753 | if (!valid_image_p (image)) | |
7754 | continue; | |
7755 | ||
e037b9ec | 7756 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
7757 | plist = Fcopy_sequence (XCDR (image)); |
7758 | ||
7759 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 7760 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
7761 | ? tool_bar_button_relief |
7762 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
7763 | hmargin = vmargin = relief; |
7764 | ||
7765 | if (INTEGERP (Vtool_bar_button_margin) | |
7766 | && XINT (Vtool_bar_button_margin) > 0) | |
7767 | { | |
7768 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
7769 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
7770 | } | |
7771 | else if (CONSP (Vtool_bar_button_margin)) | |
7772 | { | |
7773 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
7774 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
7775 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
2311178e | 7776 | |
35a41507 GM |
7777 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) |
7778 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
7779 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
7780 | } | |
2311178e | 7781 | |
e037b9ec | 7782 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
7783 | { |
7784 | /* Add a `:relief' property to the image spec if the item is | |
7785 | selected. */ | |
7786 | if (selected_p) | |
7787 | { | |
7788 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
7789 | hmargin -= relief; |
7790 | vmargin -= relief; | |
5f5c8ee5 GM |
7791 | } |
7792 | } | |
7793 | else | |
7794 | { | |
7795 | /* If image is selected, display it pressed, i.e. with a | |
7796 | negative relief. If it's not selected, display it with a | |
7797 | raised relief. */ | |
7798 | plist = Fplist_put (plist, QCrelief, | |
7799 | (selected_p | |
7800 | ? make_number (-relief) | |
7801 | : make_number (relief))); | |
35a41507 GM |
7802 | hmargin -= relief; |
7803 | vmargin -= relief; | |
5f5c8ee5 GM |
7804 | } |
7805 | ||
7806 | /* Put a margin around the image. */ | |
35a41507 GM |
7807 | if (hmargin || vmargin) |
7808 | { | |
7809 | if (hmargin == vmargin) | |
7810 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
7811 | else | |
7812 | plist = Fplist_put (plist, QCmargin, | |
7813 | Fcons (make_number (hmargin), | |
7814 | make_number (vmargin))); | |
7815 | } | |
2311178e | 7816 | |
37e4e482 GM |
7817 | /* If button is not enabled, and we don't have special images |
7818 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 7819 | applying an appropriate algorithm to it. */ |
37e4e482 | 7820 | if (!enabled_p && idx < 0) |
ecd01a0e | 7821 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
2311178e | 7822 | |
5f5c8ee5 GM |
7823 | /* Put a `display' text property on the string for the image to |
7824 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 7825 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
7826 | vector. */ |
7827 | image = Fcons (Qimage, plist); | |
7828 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
7829 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
7830 | ||
7831 | /* Let the last image hide all remaining spaces in the tool bar | |
7832 | string. The string can be longer than needed when we reuse a | |
7833 | previous string. */ | |
7834 | if (i + 1 == f->n_tool_bar_items) | |
2051c264 | 7835 | end = SCHARS (f->desired_tool_bar_string); |
a23887b9 GM |
7836 | else |
7837 | end = i + 1; | |
7838 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 7839 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7840 | #undef PROP |
a2889657 JB |
7841 | } |
7842 | ||
5f5c8ee5 GM |
7843 | UNGCPRO; |
7844 | } | |
7845 | ||
7846 | ||
e037b9ec | 7847 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
7848 | |
7849 | static void | |
e037b9ec | 7850 | display_tool_bar_line (it) |
5f5c8ee5 GM |
7851 | struct it *it; |
7852 | { | |
7853 | struct glyph_row *row = it->glyph_row; | |
7854 | int max_x = it->last_visible_x; | |
7855 | struct glyph *last; | |
2311178e | 7856 | |
5f5c8ee5 GM |
7857 | prepare_desired_row (row); |
7858 | row->y = it->current_y; | |
90aa2856 GM |
7859 | |
7860 | /* Note that this isn't made use of if the face hasn't a box, | |
7861 | so there's no need to check the face here. */ | |
7862 | it->start_of_box_run_p = 1; | |
2311178e | 7863 | |
5f5c8ee5 | 7864 | while (it->current_x < max_x) |
a2889657 | 7865 | { |
5f5c8ee5 | 7866 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 7867 | |
5f5c8ee5 GM |
7868 | /* Get the next display element. */ |
7869 | if (!get_next_display_element (it)) | |
7870 | break; | |
73af359d | 7871 | |
5f5c8ee5 GM |
7872 | /* Produce glyphs. */ |
7873 | x_before = it->current_x; | |
7874 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
7875 | PRODUCE_GLYPHS (it); | |
daa37602 | 7876 | |
5f5c8ee5 GM |
7877 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
7878 | i = 0; | |
7879 | x = x_before; | |
7880 | while (i < nglyphs) | |
7881 | { | |
7882 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
2311178e | 7883 | |
5f5c8ee5 GM |
7884 | if (x + glyph->pixel_width > max_x) |
7885 | { | |
7886 | /* Glyph doesn't fit on line. */ | |
7887 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
7888 | it->current_x = x; | |
7889 | goto out; | |
7890 | } | |
daa37602 | 7891 | |
5f5c8ee5 GM |
7892 | ++it->hpos; |
7893 | x += glyph->pixel_width; | |
7894 | ++i; | |
7895 | } | |
7896 | ||
7897 | /* Stop at line ends. */ | |
7898 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
7899 | break; | |
7900 | ||
cafafe0b | 7901 | set_iterator_to_next (it, 1); |
a2889657 | 7902 | } |
a2889657 | 7903 | |
5f5c8ee5 | 7904 | out:; |
a2889657 | 7905 | |
5f5c8ee5 GM |
7906 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
7907 | extend_face_to_end_of_line (it); | |
7908 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
7909 | last->right_box_line_p = 1; | |
90aa2856 GM |
7910 | if (last == row->glyphs[TEXT_AREA]) |
7911 | last->left_box_line_p = 1; | |
5f5c8ee5 | 7912 | compute_line_metrics (it); |
2311178e | 7913 | |
e037b9ec | 7914 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
7915 | if (!row->displays_text_p) |
7916 | { | |
312246d1 GM |
7917 | row->height = row->phys_height = it->last_visible_y - row->y; |
7918 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 | 7919 | } |
2311178e | 7920 | |
5f5c8ee5 GM |
7921 | row->full_width_p = 1; |
7922 | row->continued_p = 0; | |
7923 | row->truncated_on_left_p = 0; | |
7924 | row->truncated_on_right_p = 0; | |
7925 | ||
7926 | it->current_x = it->hpos = 0; | |
7927 | it->current_y += row->height; | |
7928 | ++it->vpos; | |
7929 | ++it->glyph_row; | |
a2889657 | 7930 | } |
96a410bc | 7931 | |
5f5c8ee5 | 7932 | |
e037b9ec | 7933 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 7934 | items of frame F visible. */ |
96a410bc | 7935 | |
d39b6696 | 7936 | static int |
e037b9ec | 7937 | tool_bar_lines_needed (f) |
5f5c8ee5 | 7938 | struct frame *f; |
d39b6696 | 7939 | { |
e037b9ec | 7940 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 | 7941 | struct it it; |
2311178e | 7942 | |
e037b9ec GM |
7943 | /* Initialize an iterator for iteration over |
7944 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
7945 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7946 | it.first_visible_x = 0; |
7947 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 7948 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
7949 | |
7950 | while (!ITERATOR_AT_END_P (&it)) | |
7951 | { | |
7952 | it.glyph_row = w->desired_matrix->rows; | |
7953 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 7954 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
7955 | } |
7956 | ||
7957 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 7958 | } |
96a410bc | 7959 | |
5f5c8ee5 | 7960 | |
57c28064 GM |
7961 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
7962 | 0, 1, 0, | |
7ee72033 MB |
7963 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
7964 | (frame) | |
57c28064 GM |
7965 | Lisp_Object frame; |
7966 | { | |
7967 | struct frame *f; | |
7968 | struct window *w; | |
7969 | int nlines = 0; | |
7970 | ||
7971 | if (NILP (frame)) | |
7972 | frame = selected_frame; | |
7973 | else | |
b7826503 | 7974 | CHECK_FRAME (frame); |
57c28064 | 7975 | f = XFRAME (frame); |
2311178e | 7976 | |
57c28064 GM |
7977 | if (WINDOWP (f->tool_bar_window) |
7978 | || (w = XWINDOW (f->tool_bar_window), | |
7979 | XFASTINT (w->height) > 0)) | |
7980 | { | |
7981 | update_tool_bar (f, 1); | |
7982 | if (f->n_tool_bar_items) | |
7983 | { | |
7984 | build_desired_tool_bar_string (f); | |
7985 | nlines = tool_bar_lines_needed (f); | |
7986 | } | |
7987 | } | |
7988 | ||
7989 | return make_number (nlines); | |
7990 | } | |
7991 | ||
7992 | ||
e037b9ec | 7993 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
7994 | height should be changed. */ |
7995 | ||
7996 | static int | |
e037b9ec | 7997 | redisplay_tool_bar (f) |
5f5c8ee5 | 7998 | struct frame *f; |
96a410bc | 7999 | { |
5f5c8ee5 GM |
8000 | struct window *w; |
8001 | struct it it; | |
8002 | struct glyph_row *row; | |
8003 | int change_height_p = 0; | |
177c0ea7 | 8004 | |
488dd4c4 JD |
8005 | #ifdef USE_GTK |
8006 | if (FRAME_EXTERNAL_TOOL_BAR(f)) | |
8007 | update_frame_tool_bar (f); | |
8008 | return 0; | |
8009 | #endif | |
2311178e | 8010 | |
e037b9ec GM |
8011 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
8012 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 8013 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
8014 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
8015 | if (!WINDOWP (f->tool_bar_window) | |
8016 | || (w = XWINDOW (f->tool_bar_window), | |
488dd4c4 | 8017 | XFASTINT (w->height) == 0)) |
5f5c8ee5 | 8018 | return 0; |
96a410bc | 8019 | |
e037b9ec GM |
8020 | /* Set up an iterator for the tool-bar window. */ |
8021 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
8022 | it.first_visible_x = 0; |
8023 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
8024 | row = it.glyph_row; | |
3450d04c | 8025 | |
e037b9ec GM |
8026 | /* Build a string that represents the contents of the tool-bar. */ |
8027 | build_desired_tool_bar_string (f); | |
8028 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 8029 | |
e037b9ec | 8030 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 8031 | while (it.current_y < it.last_visible_y) |
e037b9ec | 8032 | display_tool_bar_line (&it); |
3450d04c | 8033 | |
e037b9ec | 8034 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
8035 | window, so don't do it. */ |
8036 | w->desired_matrix->no_scrolling_p = 1; | |
8037 | w->must_be_updated_p = 1; | |
3450d04c | 8038 | |
e037b9ec | 8039 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
8040 | { |
8041 | int nlines; | |
6e33e6f0 GM |
8042 | |
8043 | /* If we couldn't display everything, change the tool-bar's | |
8044 | height. */ | |
8045 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
8046 | change_height_p = 1; | |
2311178e | 8047 | |
5f5c8ee5 GM |
8048 | /* If there are blank lines at the end, except for a partially |
8049 | visible blank line at the end that is smaller than | |
e037b9ec | 8050 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
8051 | row = it.glyph_row - 1; |
8052 | if (!row->displays_text_p | |
8053 | && row->height >= CANON_Y_UNIT (f)) | |
8054 | change_height_p = 1; | |
8055 | ||
e037b9ec GM |
8056 | /* If row displays tool-bar items, but is partially visible, |
8057 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
8058 | if (row->displays_text_p |
8059 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
8060 | change_height_p = 1; | |
8061 | ||
e037b9ec | 8062 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
8063 | frame parameter. */ |
8064 | if (change_height_p | |
e037b9ec | 8065 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
8066 | nlines != XFASTINT (w->height))) |
8067 | { | |
e037b9ec | 8068 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 8069 | Lisp_Object frame; |
e85ee976 | 8070 | int old_height = XFASTINT (w->height); |
2311178e | 8071 | |
5f5c8ee5 GM |
8072 | XSETFRAME (frame, f); |
8073 | clear_glyph_matrix (w->desired_matrix); | |
8074 | Fmodify_frame_parameters (frame, | |
e037b9ec | 8075 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
8076 | make_number (nlines)), |
8077 | Qnil)); | |
e85ee976 GM |
8078 | if (XFASTINT (w->height) != old_height) |
8079 | fonts_changed_p = 1; | |
5f5c8ee5 GM |
8080 | } |
8081 | } | |
3450d04c | 8082 | |
5f5c8ee5 | 8083 | return change_height_p; |
96a410bc | 8084 | } |
90adcf20 | 8085 | |
5f5c8ee5 | 8086 | |
e037b9ec GM |
8087 | /* Get information about the tool-bar item which is displayed in GLYPH |
8088 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 8089 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 8090 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 GM |
8091 | |
8092 | int | |
e037b9ec | 8093 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
8094 | struct frame *f; |
8095 | struct glyph *glyph; | |
8096 | int *prop_idx; | |
90adcf20 | 8097 | { |
5f5c8ee5 GM |
8098 | Lisp_Object prop; |
8099 | int success_p; | |
be676094 GM |
8100 | int charpos; |
8101 | ||
8102 | /* This function can be called asynchronously, which means we must | |
8103 | exclude any possibility that Fget_text_property signals an | |
8104 | error. */ | |
2051c264 | 8105 | charpos = min (SCHARS (f->current_tool_bar_string), glyph->charpos); |
be676094 | 8106 | charpos = max (0, charpos); |
2311178e | 8107 | |
5f5c8ee5 GM |
8108 | /* Get the text property `menu-item' at pos. The value of that |
8109 | property is the start index of this item's properties in | |
7464726e | 8110 | F->tool_bar_items. */ |
be676094 | 8111 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 8112 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
8113 | if (INTEGERP (prop)) |
8114 | { | |
8115 | *prop_idx = XINT (prop); | |
8116 | success_p = 1; | |
8117 | } | |
8118 | else | |
8119 | success_p = 0; | |
90adcf20 | 8120 | |
5f5c8ee5 GM |
8121 | return success_p; |
8122 | } | |
2311178e | 8123 | |
5f5c8ee5 | 8124 | #endif /* HAVE_WINDOW_SYSTEM */ |
90adcf20 | 8125 | |
feb0c42f | 8126 | |
5f5c8ee5 GM |
8127 | \f |
8128 | /************************************************************************ | |
8129 | Horizontal scrolling | |
8130 | ************************************************************************/ | |
feb0c42f | 8131 | |
5f5c8ee5 GM |
8132 | static int hscroll_window_tree P_ ((Lisp_Object)); |
8133 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 8134 | |
5f5c8ee5 GM |
8135 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
8136 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
8137 | that it is not within a certain margin at the window's left and | |
8138 | right border. Value is non-zero if any window's hscroll has been | |
8139 | changed. */ | |
8140 | ||
8141 | static int | |
8142 | hscroll_window_tree (window) | |
8143 | Lisp_Object window; | |
8144 | { | |
8145 | int hscrolled_p = 0; | |
e76d28d5 | 8146 | int hscroll_relative_p = FLOATP (Vhscroll_step); |
1df7e8f0 EZ |
8147 | int hscroll_step_abs = 0; |
8148 | double hscroll_step_rel = 0; | |
8149 | ||
8150 | if (hscroll_relative_p) | |
8151 | { | |
e76d28d5 | 8152 | hscroll_step_rel = XFLOAT_DATA (Vhscroll_step); |
1df7e8f0 EZ |
8153 | if (hscroll_step_rel < 0) |
8154 | { | |
8155 | hscroll_relative_p = 0; | |
8156 | hscroll_step_abs = 0; | |
8157 | } | |
8158 | } | |
e76d28d5 | 8159 | else if (INTEGERP (Vhscroll_step)) |
1df7e8f0 | 8160 | { |
e76d28d5 | 8161 | hscroll_step_abs = XINT (Vhscroll_step); |
1df7e8f0 EZ |
8162 | if (hscroll_step_abs < 0) |
8163 | hscroll_step_abs = 0; | |
8164 | } | |
8165 | else | |
8166 | hscroll_step_abs = 0; | |
8167 | ||
5f5c8ee5 | 8168 | while (WINDOWP (window)) |
90adcf20 | 8169 | { |
5f5c8ee5 | 8170 | struct window *w = XWINDOW (window); |
1df7e8f0 | 8171 | |
5f5c8ee5 GM |
8172 | if (WINDOWP (w->hchild)) |
8173 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
8174 | else if (WINDOWP (w->vchild)) | |
8175 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
8176 | else if (w->cursor.vpos >= 0) | |
8177 | { | |
e76d28d5 | 8178 | int h_margin, text_area_x, text_area_y; |
5f5c8ee5 | 8179 | int text_area_width, text_area_height; |
92a90e89 GM |
8180 | struct glyph_row *current_cursor_row |
8181 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
8182 | struct glyph_row *desired_cursor_row | |
8183 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
8184 | struct glyph_row *cursor_row | |
8185 | = (desired_cursor_row->enabled_p | |
8186 | ? desired_cursor_row | |
8187 | : current_cursor_row); | |
a2725ab2 | 8188 | |
5f5c8ee5 GM |
8189 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
8190 | &text_area_width, &text_area_height); | |
90adcf20 | 8191 | |
5f5c8ee5 | 8192 | /* Scroll when cursor is inside this scroll margin. */ |
e76d28d5 | 8193 | h_margin = hscroll_margin * CANON_X_UNIT (XFRAME (w->frame)); |
1df7e8f0 | 8194 | |
5f5c8ee5 | 8195 | if ((XFASTINT (w->hscroll) |
e76d28d5 | 8196 | && w->cursor.x <= h_margin) |
92a90e89 GM |
8197 | || (cursor_row->enabled_p |
8198 | && cursor_row->truncated_on_right_p | |
e76d28d5 | 8199 | && (w->cursor.x >= text_area_width - h_margin))) |
08b610e4 | 8200 | { |
5f5c8ee5 GM |
8201 | struct it it; |
8202 | int hscroll; | |
8203 | struct buffer *saved_current_buffer; | |
8204 | int pt; | |
1df7e8f0 | 8205 | int wanted_x; |
5f5c8ee5 GM |
8206 | |
8207 | /* Find point in a display of infinite width. */ | |
8208 | saved_current_buffer = current_buffer; | |
8209 | current_buffer = XBUFFER (w->buffer); | |
1df7e8f0 | 8210 | |
5f5c8ee5 GM |
8211 | if (w == XWINDOW (selected_window)) |
8212 | pt = BUF_PT (current_buffer); | |
8213 | else | |
08b610e4 | 8214 | { |
5f5c8ee5 GM |
8215 | pt = marker_position (w->pointm); |
8216 | pt = max (BEGV, pt); | |
8217 | pt = min (ZV, pt); | |
8218 | } | |
8219 | ||
8220 | /* Move iterator to pt starting at cursor_row->start in | |
8221 | a line with infinite width. */ | |
8222 | init_to_row_start (&it, w, cursor_row); | |
8223 | it.last_visible_x = INFINITY; | |
8224 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
8225 | current_buffer = saved_current_buffer; | |
8226 | ||
1df7e8f0 EZ |
8227 | /* Position cursor in window. */ |
8228 | if (!hscroll_relative_p && hscroll_step_abs == 0) | |
8229 | hscroll = max (0, it.current_x - text_area_width / 2) | |
8230 | / CANON_X_UNIT (it.f); | |
e76d28d5 | 8231 | else if (w->cursor.x >= text_area_width - h_margin) |
1df7e8f0 EZ |
8232 | { |
8233 | if (hscroll_relative_p) | |
8234 | wanted_x = text_area_width * (1 - hscroll_step_rel) | |
e76d28d5 | 8235 | - h_margin; |
1df7e8f0 EZ |
8236 | else |
8237 | wanted_x = text_area_width | |
8238 | - hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8239 | - h_margin; |
1df7e8f0 EZ |
8240 | hscroll |
8241 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8242 | } | |
8243 | else | |
8244 | { | |
8245 | if (hscroll_relative_p) | |
8246 | wanted_x = text_area_width * hscroll_step_rel | |
e76d28d5 | 8247 | + h_margin; |
1df7e8f0 EZ |
8248 | else |
8249 | wanted_x = hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8250 | + h_margin; |
1df7e8f0 EZ |
8251 | hscroll |
8252 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8253 | } | |
3172f70b | 8254 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
8255 | |
8256 | /* Don't call Fset_window_hscroll if value hasn't | |
8257 | changed because it will prevent redisplay | |
8258 | optimizations. */ | |
8259 | if (XFASTINT (w->hscroll) != hscroll) | |
8260 | { | |
3172f70b GM |
8261 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
8262 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 8263 | hscrolled_p = 1; |
08b610e4 | 8264 | } |
08b610e4 | 8265 | } |
08b610e4 | 8266 | } |
a2725ab2 | 8267 | |
5f5c8ee5 | 8268 | window = w->next; |
90adcf20 | 8269 | } |
cd6dfed6 | 8270 | |
5f5c8ee5 GM |
8271 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
8272 | return hscrolled_p; | |
8273 | } | |
8274 | ||
8275 | ||
8276 | /* Set hscroll so that cursor is visible and not inside horizontal | |
8277 | scroll margins for all windows in the tree rooted at WINDOW. See | |
8278 | also hscroll_window_tree above. Value is non-zero if any window's | |
8279 | hscroll has been changed. If it has, desired matrices on the frame | |
8280 | of WINDOW are cleared. */ | |
8281 | ||
8282 | static int | |
8283 | hscroll_windows (window) | |
8284 | Lisp_Object window; | |
8285 | { | |
d475bcb8 | 8286 | int hscrolled_p; |
2311178e | 8287 | |
d475bcb8 GM |
8288 | if (automatic_hscrolling_p) |
8289 | { | |
8290 | hscrolled_p = hscroll_window_tree (window); | |
8291 | if (hscrolled_p) | |
8292 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
8293 | } | |
8294 | else | |
8295 | hscrolled_p = 0; | |
5f5c8ee5 | 8296 | return hscrolled_p; |
90adcf20 | 8297 | } |
5f5c8ee5 GM |
8298 | |
8299 | ||
90adcf20 | 8300 | \f |
5f5c8ee5 GM |
8301 | /************************************************************************ |
8302 | Redisplay | |
8303 | ************************************************************************/ | |
8304 | ||
8305 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
8306 | to a non-zero value. This is sometimes handy to have in a debugger | |
8307 | session. */ | |
8308 | ||
8309 | #if GLYPH_DEBUG | |
a2889657 | 8310 | |
5f5c8ee5 GM |
8311 | /* First and last unchanged row for try_window_id. */ |
8312 | ||
8313 | int debug_first_unchanged_at_end_vpos; | |
8314 | int debug_last_unchanged_at_beg_vpos; | |
8315 | ||
8316 | /* Delta vpos and y. */ | |
8317 | ||
8318 | int debug_dvpos, debug_dy; | |
8319 | ||
8320 | /* Delta in characters and bytes for try_window_id. */ | |
8321 | ||
8322 | int debug_delta, debug_delta_bytes; | |
8323 | ||
8324 | /* Values of window_end_pos and window_end_vpos at the end of | |
8325 | try_window_id. */ | |
8326 | ||
31ade731 | 8327 | EMACS_INT debug_end_pos, debug_end_vpos; |
5f5c8ee5 GM |
8328 | |
8329 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
8330 | format string. A1...A9 are a supplement for a variable-length | |
8331 | argument list. If trace_redisplay_p is non-zero also printf the | |
8332 | resulting string to stderr. */ | |
8333 | ||
8334 | static void | |
8335 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
8336 | struct window *w; | |
8337 | char *fmt; | |
8338 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
8339 | { | |
8340 | char buffer[512]; | |
8341 | char *method = w->desired_matrix->method; | |
8342 | int len = strlen (method); | |
8343 | int size = sizeof w->desired_matrix->method; | |
8344 | int remaining = size - len - 1; | |
8345 | ||
8346 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
8347 | if (len && remaining) | |
8348 | { | |
8349 | method[len] = '|'; | |
8350 | --remaining, ++len; | |
8351 | } | |
2311178e | 8352 | |
5f5c8ee5 GM |
8353 | strncpy (method + len, buffer, remaining); |
8354 | ||
8355 | if (trace_redisplay_p) | |
8356 | fprintf (stderr, "%p (%s): %s\n", | |
8357 | w, | |
8358 | ((BUFFERP (w->buffer) | |
8359 | && STRINGP (XBUFFER (w->buffer)->name)) | |
2051c264 | 8360 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
5f5c8ee5 GM |
8361 | : "no buffer"), |
8362 | buffer); | |
8363 | } | |
a2889657 | 8364 | |
5f5c8ee5 | 8365 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 8366 | |
a2889657 | 8367 | |
5f5c8ee5 GM |
8368 | /* Value is non-zero if all changes in window W, which displays |
8369 | current_buffer, are in the text between START and END. START is a | |
8370 | buffer position, END is given as a distance from Z. Used in | |
8371 | redisplay_internal for display optimization. */ | |
8372 | ||
8373 | static INLINE int | |
8374 | text_outside_line_unchanged_p (w, start, end) | |
8375 | struct window *w; | |
8376 | int start, end; | |
8377 | { | |
8378 | int unchanged_p = 1; | |
2311178e | 8379 | |
5f5c8ee5 GM |
8380 | /* If text or overlays have changed, see where. */ |
8381 | if (XFASTINT (w->last_modified) < MODIFF | |
8382 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
8383 | { | |
8384 | /* Gap in the line? */ | |
8385 | if (GPT < start || Z - GPT < end) | |
8386 | unchanged_p = 0; | |
8387 | ||
8388 | /* Changes start in front of the line, or end after it? */ | |
8389 | if (unchanged_p | |
9142dd5b GM |
8390 | && (BEG_UNCHANGED < start - 1 |
8391 | || END_UNCHANGED < end)) | |
5f5c8ee5 | 8392 | unchanged_p = 0; |
2311178e | 8393 | |
5f5c8ee5 GM |
8394 | /* If selective display, can't optimize if changes start at the |
8395 | beginning of the line. */ | |
8396 | if (unchanged_p | |
8397 | && INTEGERP (current_buffer->selective_display) | |
8398 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 8399 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 8400 | unchanged_p = 0; |
47d57b22 GM |
8401 | |
8402 | /* If there are overlays at the start or end of the line, these | |
8403 | may have overlay strings with newlines in them. A change at | |
8404 | START, for instance, may actually concern the display of such | |
8405 | overlay strings as well, and they are displayed on different | |
8406 | lines. So, quickly rule out this case. (For the future, it | |
8407 | might be desirable to implement something more telling than | |
8408 | just BEG/END_UNCHANGED.) */ | |
8409 | if (unchanged_p) | |
8410 | { | |
8411 | if (BEG + BEG_UNCHANGED == start | |
8412 | && overlay_touches_p (start)) | |
8413 | unchanged_p = 0; | |
8414 | if (END_UNCHANGED == end | |
8415 | && overlay_touches_p (Z - end)) | |
8416 | unchanged_p = 0; | |
8417 | } | |
5f5c8ee5 GM |
8418 | } |
8419 | ||
8420 | return unchanged_p; | |
8421 | } | |
8422 | ||
8423 | ||
8424 | /* Do a frame update, taking possible shortcuts into account. This is | |
8425 | the main external entry point for redisplay. | |
8426 | ||
8427 | If the last redisplay displayed an echo area message and that message | |
8428 | is no longer requested, we clear the echo area or bring back the | |
8429 | mini-buffer if that is in use. */ | |
20de20dc | 8430 | |
a2889657 JB |
8431 | void |
8432 | redisplay () | |
e9874cee RS |
8433 | { |
8434 | redisplay_internal (0); | |
8435 | } | |
8436 | ||
47d57b22 | 8437 | |
260a86a0 KH |
8438 | /* Return 1 if point moved out of or into a composition. Otherwise |
8439 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
8440 | position. BUF and PT are the current point buffer and position. */ | |
8441 | ||
8442 | int | |
8443 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
8444 | struct buffer *prev_buf, *buf; | |
8445 | int prev_pt, pt; | |
8446 | { | |
8447 | int start, end; | |
8448 | Lisp_Object prop; | |
8449 | Lisp_Object buffer; | |
8450 | ||
8451 | XSETBUFFER (buffer, buf); | |
8452 | /* Check a composition at the last point if point moved within the | |
8453 | same buffer. */ | |
8454 | if (prev_buf == buf) | |
8455 | { | |
8456 | if (prev_pt == pt) | |
8457 | /* Point didn't move. */ | |
8458 | return 0; | |
2311178e | 8459 | |
260a86a0 KH |
8460 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) |
8461 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
8462 | && COMPOSITION_VALID_P (start, end, prop) | |
8463 | && start < prev_pt && end > prev_pt) | |
8464 | /* The last point was within the composition. Return 1 iff | |
8465 | point moved out of the composition. */ | |
8466 | return (pt <= start || pt >= end); | |
8467 | } | |
8468 | ||
8469 | /* Check a composition at the current point. */ | |
8470 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
8471 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
8472 | && COMPOSITION_VALID_P (start, end, prop) | |
8473 | && start < pt && end > pt); | |
8474 | } | |
5f5c8ee5 | 8475 | |
47d57b22 | 8476 | |
9142dd5b GM |
8477 | /* Reconsider the setting of B->clip_changed which is displayed |
8478 | in window W. */ | |
8479 | ||
8480 | static INLINE void | |
8481 | reconsider_clip_changes (w, b) | |
8482 | struct window *w; | |
8483 | struct buffer *b; | |
8484 | { | |
c62c1bb5 | 8485 | if (b->clip_changed |
9142dd5b GM |
8486 | && !NILP (w->window_end_valid) |
8487 | && w->current_matrix->buffer == b | |
8488 | && w->current_matrix->zv == BUF_ZV (b) | |
8489 | && w->current_matrix->begv == BUF_BEGV (b)) | |
8490 | b->clip_changed = 0; | |
260a86a0 KH |
8491 | |
8492 | /* If display wasn't paused, and W is not a tool bar window, see if | |
8493 | point has been moved into or out of a composition. In that case, | |
8494 | we set b->clip_changed to 1 to force updating the screen. If | |
8495 | b->clip_changed has already been set to 1, we can skip this | |
8496 | check. */ | |
8497 | if (!b->clip_changed | |
8498 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
8499 | { | |
8500 | int pt; | |
8501 | ||
8502 | if (w == XWINDOW (selected_window)) | |
8503 | pt = BUF_PT (current_buffer); | |
8504 | else | |
8505 | pt = marker_position (w->pointm); | |
8506 | ||
8507 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 8508 | || pt != XINT (w->last_point)) |
260a86a0 | 8509 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 8510 | XINT (w->last_point), |
260a86a0 KH |
8511 | XBUFFER (w->buffer), pt)) |
8512 | b->clip_changed = 1; | |
8513 | } | |
9142dd5b | 8514 | } |
aac2d8b2 RS |
8515 | \f |
8516 | #define STOP_POLLING \ | |
8517 | do { if (! polling_stopped_here) stop_polling (); \ | |
8518 | polling_stopped_here = 1; } while (0) | |
8519 | ||
8520 | #define RESUME_POLLING \ | |
8521 | do { if (polling_stopped_here) start_polling (); \ | |
8522 | polling_stopped_here = 0; } while (0) | |
9142dd5b GM |
8523 | |
8524 | ||
5f5c8ee5 GM |
8525 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
8526 | response to any user action; therefore, we should preserve the echo | |
8527 | area. (Actually, our caller does that job.) Perhaps in the future | |
8528 | avoid recentering windows if it is not necessary; currently that | |
8529 | causes some problems. */ | |
e9874cee RS |
8530 | |
8531 | static void | |
8532 | redisplay_internal (preserve_echo_area) | |
8533 | int preserve_echo_area; | |
a2889657 | 8534 | { |
5f5c8ee5 GM |
8535 | struct window *w = XWINDOW (selected_window); |
8536 | struct frame *f = XFRAME (w->frame); | |
8537 | int pause; | |
a2889657 | 8538 | int must_finish = 0; |
5f5c8ee5 | 8539 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 8540 | int number_of_visible_frames; |
28514cd9 | 8541 | int count; |
886bd6f2 | 8542 | struct frame *sf = SELECTED_FRAME (); |
aac2d8b2 | 8543 | int polling_stopped_here = 0; |
a2889657 | 8544 | |
5f5c8ee5 GM |
8545 | /* Non-zero means redisplay has to consider all windows on all |
8546 | frames. Zero means, only selected_window is considered. */ | |
8547 | int consider_all_windows_p; | |
2311178e | 8548 | |
5f5c8ee5 GM |
8549 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); |
8550 | ||
8551 | /* No redisplay if running in batch mode or frame is not yet fully | |
8552 | initialized, or redisplay is explicitly turned off by setting | |
8553 | Vinhibit_redisplay. */ | |
8554 | if (noninteractive | |
8555 | || !NILP (Vinhibit_redisplay) | |
8556 | || !f->glyphs_initialized_p) | |
a2889657 JB |
8557 | return; |
8558 | ||
5f5c8ee5 GM |
8559 | /* The flag redisplay_performed_directly_p is set by |
8560 | direct_output_for_insert when it already did the whole screen | |
8561 | update necessary. */ | |
8562 | if (redisplay_performed_directly_p) | |
8563 | { | |
8564 | redisplay_performed_directly_p = 0; | |
8565 | if (!hscroll_windows (selected_window)) | |
8566 | return; | |
8567 | } | |
8568 | ||
488dd4c4 | 8569 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
15f0cf78 RS |
8570 | if (popup_activated ()) |
8571 | return; | |
8572 | #endif | |
8573 | ||
28514cd9 | 8574 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 8575 | if (redisplaying_p) |
735c094c KH |
8576 | return; |
8577 | ||
28514cd9 GM |
8578 | /* Record a function that resets redisplaying_p to its old value |
8579 | when we leave this function. */ | |
331379bf | 8580 | count = SPECPDL_INDEX (); |
28514cd9 GM |
8581 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); |
8582 | ++redisplaying_p; | |
26683087 | 8583 | specbind (Qinhibit_free_realized_faces, Qnil); |
2311178e | 8584 | |
8b32d885 | 8585 | retry: |
bd9d0f3f | 8586 | pause = 0; |
9142dd5b GM |
8587 | reconsider_clip_changes (w, current_buffer); |
8588 | ||
5f5c8ee5 GM |
8589 | /* If new fonts have been loaded that make a glyph matrix adjustment |
8590 | necessary, do it. */ | |
8591 | if (fonts_changed_p) | |
8592 | { | |
8593 | adjust_glyphs (NULL); | |
8594 | ++windows_or_buffers_changed; | |
8595 | fonts_changed_p = 0; | |
8596 | } | |
8597 | ||
6961e0c1 GM |
8598 | /* If face_change_count is non-zero, init_iterator will free all |
8599 | realized faces, which includes the faces referenced from current | |
8600 | matrices. So, we can't reuse current matrices in this case. */ | |
8601 | if (face_change_count) | |
8602 | ++windows_or_buffers_changed; | |
8603 | ||
886bd6f2 GM |
8604 | if (! FRAME_WINDOW_P (sf) |
8605 | && previous_terminal_frame != sf) | |
20de20dc | 8606 | { |
5f5c8ee5 GM |
8607 | /* Since frames on an ASCII terminal share the same display |
8608 | area, displaying a different frame means redisplay the whole | |
8609 | thing. */ | |
20de20dc | 8610 | windows_or_buffers_changed++; |
886bd6f2 GM |
8611 | SET_FRAME_GARBAGED (sf); |
8612 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 8613 | } |
886bd6f2 | 8614 | previous_terminal_frame = sf; |
20de20dc | 8615 | |
5f5c8ee5 GM |
8616 | /* Set the visible flags for all frames. Do this before checking |
8617 | for resized or garbaged frames; they want to know if their frames | |
8618 | are visible. See the comment in frame.h for | |
8619 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 8620 | { |
35f56f96 | 8621 | Lisp_Object tail, frame; |
d724d989 | 8622 | |
89819bdd RS |
8623 | number_of_visible_frames = 0; |
8624 | ||
35f56f96 | 8625 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 8626 | { |
5f5c8ee5 | 8627 | struct frame *f = XFRAME (frame); |
2311178e | 8628 | |
5f5c8ee5 GM |
8629 | FRAME_SAMPLE_VISIBILITY (f); |
8630 | if (FRAME_VISIBLE_P (f)) | |
8631 | ++number_of_visible_frames; | |
8632 | clear_desired_matrices (f); | |
f82aff7c | 8633 | } |
d724d989 JB |
8634 | } |
8635 | ||
44fa5b1e | 8636 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 8637 | do_pending_window_change (1); |
a2889657 | 8638 | |
5f5c8ee5 | 8639 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 8640 | if (frame_garbaged) |
c6e89d6c | 8641 | clear_garbaged_frames (); |
a2889657 | 8642 | |
e037b9ec | 8643 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
8644 | prepare_menu_bars (); |
8645 | ||
28995e67 | 8646 | if (windows_or_buffers_changed) |
a2889657 JB |
8647 | update_mode_lines++; |
8648 | ||
538f13d4 RS |
8649 | /* Detect case that we need to write or remove a star in the mode line. */ |
8650 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
8651 | { |
8652 | w->update_mode_line = Qt; | |
8653 | if (buffer_shared > 1) | |
8654 | update_mode_lines++; | |
8655 | } | |
8656 | ||
5f5c8ee5 | 8657 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
8658 | if (!NILP (w->column_number_displayed) |
8659 | /* This alternative quickly identifies a common case | |
8660 | where no change is needed. */ | |
8661 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8662 | && XFASTINT (w->last_modified) >= MODIFF |
8663 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
8664 | && (XFASTINT (w->column_number_displayed) |
8665 | != (int) current_column ())) /* iftc */ | |
8666 | w->update_mode_line = Qt; | |
28995e67 | 8667 | |
44fa5b1e | 8668 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 8669 | |
5f5c8ee5 GM |
8670 | /* The variable buffer_shared is set in redisplay_window and |
8671 | indicates that we redisplay a buffer in different windows. See | |
8672 | there. */ | |
5fb96e96 RS |
8673 | consider_all_windows_p = (update_mode_lines || buffer_shared > 1 |
8674 | || cursor_type_changed); | |
a2889657 JB |
8675 | |
8676 | /* If specs for an arrow have changed, do thorough redisplay | |
8677 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 8678 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 8679 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 8680 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 8681 | |
90adcf20 RS |
8682 | /* Normally the message* functions will have already displayed and |
8683 | updated the echo area, but the frame may have been trashed, or | |
8684 | the update may have been preempted, so display the echo area | |
6e019995 | 8685 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 8686 | the echo area should be cleared. */ |
96d5e9a0 GM |
8687 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
8688 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
8689 | || (message_cleared_p |
8690 | && minibuf_level == 0 | |
8691 | /* If the mini-window is currently selected, this means the | |
8692 | echo-area doesn't show through. */ | |
8693 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 8694 | { |
c6e89d6c | 8695 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 8696 | must_finish = 1; |
6e019995 GM |
8697 | |
8698 | /* If we don't display the current message, don't clear the | |
8699 | message_cleared_p flag, because, if we did, we wouldn't clear | |
8700 | the echo area in the next redisplay which doesn't preserve | |
8701 | the echo area. */ | |
8702 | if (!display_last_displayed_message_p) | |
8703 | message_cleared_p = 0; | |
2311178e | 8704 | |
c6e89d6c GM |
8705 | if (fonts_changed_p) |
8706 | goto retry; | |
8707 | else if (window_height_changed_p) | |
8708 | { | |
8709 | consider_all_windows_p = 1; | |
8710 | ++update_mode_lines; | |
8711 | ++windows_or_buffers_changed; | |
2311178e | 8712 | |
9142dd5b GM |
8713 | /* If window configuration was changed, frames may have been |
8714 | marked garbaged. Clear them or we will experience | |
8715 | surprises wrt scrolling. */ | |
8716 | if (frame_garbaged) | |
8717 | clear_garbaged_frames (); | |
c6e89d6c | 8718 | } |
90adcf20 | 8719 | } |
97a36635 | 8720 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
8721 | && (current_buffer->clip_changed |
8722 | || XFASTINT (w->last_modified) < MODIFF | |
8723 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 8724 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
8725 | { |
8726 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
8727 | showing if its contents might have changed. */ |
8728 | must_finish = 1; | |
8729 | consider_all_windows_p = 1; | |
c6e89d6c | 8730 | ++windows_or_buffers_changed; |
dd2eb166 | 8731 | ++update_mode_lines; |
2311178e | 8732 | |
9142dd5b GM |
8733 | /* If window configuration was changed, frames may have been |
8734 | marked garbaged. Clear them or we will experience | |
8735 | surprises wrt scrolling. */ | |
8736 | if (frame_garbaged) | |
8737 | clear_garbaged_frames (); | |
c6e89d6c | 8738 | } |
2311178e | 8739 | |
90adcf20 | 8740 | |
5f5c8ee5 GM |
8741 | /* If showing the region, and mark has changed, we must redisplay |
8742 | the whole window. The assignment to this_line_start_pos prevents | |
8743 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
8744 | if (((!NILP (Vtransient_mark_mode) |
8745 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
8746 | != !NILP (w->region_showing)) | |
82d04750 JB |
8747 | || (!NILP (w->region_showing) |
8748 | && !EQ (w->region_showing, | |
8749 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
8750 | CHARPOS (this_line_start_pos) = 0; |
8751 | ||
8752 | /* Optimize the case that only the line containing the cursor in the | |
8753 | selected window has changed. Variables starting with this_ are | |
8754 | set in display_line and record information about the line | |
8755 | containing the cursor. */ | |
8756 | tlbufpos = this_line_start_pos; | |
8757 | tlendpos = this_line_end_pos; | |
8758 | if (!consider_all_windows_p | |
8759 | && CHARPOS (tlbufpos) > 0 | |
8760 | && NILP (w->update_mode_line) | |
73af359d | 8761 | && !current_buffer->clip_changed |
c62c1bb5 | 8762 | && !current_buffer->prevent_redisplay_optimizations_p |
44fa5b1e | 8763 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 8764 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 8765 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
8766 | && this_line_buffer == current_buffer |
8767 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 8768 | && NILP (w->force_start) |
acda20e1 | 8769 | && NILP (w->optional_new_start) |
5f5c8ee5 GM |
8770 | /* Point must be on the line that we have info recorded about. */ |
8771 | && PT >= CHARPOS (tlbufpos) | |
8772 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
8773 | /* All text outside that line, including its final newline, |
8774 | must be unchanged */ | |
5f5c8ee5 GM |
8775 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
8776 | CHARPOS (tlendpos))) | |
8777 | { | |
8778 | if (CHARPOS (tlbufpos) > BEGV | |
8779 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
8780 | && (CHARPOS (tlbufpos) == ZV | |
8781 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
8782 | /* Former continuation line has disappeared by becoming empty */ |
8783 | goto cancel; | |
8784 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 8785 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
8786 | || MINI_WINDOW_P (w)) |
8787 | { | |
1c9241f5 KH |
8788 | /* We have to handle the case of continuation around a |
8789 | wide-column character (See the comment in indent.c around | |
8790 | line 885). | |
8791 | ||
8792 | For instance, in the following case: | |
8793 | ||
8794 | -------- Insert -------- | |
8795 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
8796 | J_I_ ==> J_I_ `^^' are cursors. | |
8797 | ^^ ^^ | |
8798 | -------- -------- | |
8799 | ||
8800 | As we have to redraw the line above, we should goto cancel. */ | |
8801 | ||
5f5c8ee5 GM |
8802 | struct it it; |
8803 | int line_height_before = this_line_pixel_height; | |
8804 | ||
8805 | /* Note that start_display will handle the case that the | |
8806 | line starting at tlbufpos is a continuation lines. */ | |
8807 | start_display (&it, w, tlbufpos); | |
8808 | ||
8809 | /* Implementation note: It this still necessary? */ | |
8810 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
8811 | goto cancel; |
8812 | ||
5f5c8ee5 GM |
8813 | TRACE ((stderr, "trying display optimization 1\n")); |
8814 | w->cursor.vpos = -1; | |
a2889657 | 8815 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
8816 | it.vpos = this_line_vpos; |
8817 | it.current_y = this_line_y; | |
8818 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
8819 | display_line (&it); | |
8820 | ||
a2889657 | 8821 | /* If line contains point, is not continued, |
5f5c8ee5 | 8822 | and ends at same distance from eob as before, we win */ |
2311178e | 8823 | if (w->cursor.vpos >= 0 |
5f5c8ee5 GM |
8824 | /* Line is not continued, otherwise this_line_start_pos |
8825 | would have been set to 0 in display_line. */ | |
8826 | && CHARPOS (this_line_start_pos) | |
8827 | /* Line ends as before. */ | |
8828 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
8829 | /* Line has same height as before. Otherwise other lines | |
8830 | would have to be shifted up or down. */ | |
8831 | && this_line_pixel_height == line_height_before) | |
a2889657 | 8832 | { |
5f5c8ee5 GM |
8833 | /* If this is not the window's last line, we must adjust |
8834 | the charstarts of the lines below. */ | |
8835 | if (it.current_y < it.last_visible_y) | |
8836 | { | |
8837 | struct glyph_row *row | |
8838 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
8839 | int delta, delta_bytes; | |
2311178e | 8840 | |
5f5c8ee5 GM |
8841 | if (Z - CHARPOS (tlendpos) == ZV) |
8842 | { | |
8843 | /* This line ends at end of (accessible part of) | |
8844 | buffer. There is no newline to count. */ | |
8845 | delta = (Z | |
8846 | - CHARPOS (tlendpos) | |
8847 | - MATRIX_ROW_START_CHARPOS (row)); | |
8848 | delta_bytes = (Z_BYTE | |
8849 | - BYTEPOS (tlendpos) | |
8850 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8851 | } | |
8852 | else | |
8853 | { | |
8854 | /* This line ends in a newline. Must take | |
8855 | account of the newline and the rest of the | |
8856 | text that follows. */ | |
8857 | delta = (Z | |
8858 | - CHARPOS (tlendpos) | |
8859 | - MATRIX_ROW_START_CHARPOS (row)); | |
8860 | delta_bytes = (Z_BYTE | |
8861 | - BYTEPOS (tlendpos) | |
8862 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8863 | } | |
2311178e | 8864 | |
f2d86d7a GM |
8865 | increment_matrix_positions (w->current_matrix, |
8866 | this_line_vpos + 1, | |
8867 | w->current_matrix->nrows, | |
8868 | delta, delta_bytes); | |
85bcef6c | 8869 | } |
46db8486 | 8870 | |
5f5c8ee5 GM |
8871 | /* If this row displays text now but previously didn't, |
8872 | or vice versa, w->window_end_vpos may have to be | |
8873 | adjusted. */ | |
8874 | if ((it.glyph_row - 1)->displays_text_p) | |
8875 | { | |
8876 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
8877 | XSETINT (w->window_end_vpos, this_line_vpos); | |
8878 | } | |
8879 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
8880 | && this_line_vpos > 0) | |
8881 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
8882 | w->window_end_valid = Qnil; | |
2311178e | 8883 | |
5f5c8ee5 GM |
8884 | /* Update hint: No need to try to scroll in update_window. */ |
8885 | w->desired_matrix->no_scrolling_p = 1; | |
8886 | ||
8887 | #if GLYPH_DEBUG | |
8888 | *w->desired_matrix->method = 0; | |
8889 | debug_method_add (w, "optimization 1"); | |
8890 | #endif | |
a2889657 JB |
8891 | goto update; |
8892 | } | |
8893 | else | |
8894 | goto cancel; | |
8895 | } | |
5f5c8ee5 GM |
8896 | else if (/* Cursor position hasn't changed. */ |
8897 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
8898 | /* Make sure the cursor was last displayed |
8899 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
8900 | && 0 <= w->cursor.vpos |
8901 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
8902 | { |
8903 | if (!must_finish) | |
8904 | { | |
c6e89d6c | 8905 | do_pending_window_change (1); |
5f5c8ee5 | 8906 | |
2311178e | 8907 | /* We used to always goto end_of_redisplay here, but this |
5f5c8ee5 GM |
8908 | isn't enough if we have a blinking cursor. */ |
8909 | if (w->cursor_off_p == w->last_cursor_off_p) | |
8910 | goto end_of_redisplay; | |
a2889657 JB |
8911 | } |
8912 | goto update; | |
8913 | } | |
8b51f1e3 KH |
8914 | /* If highlighting the region, or if the cursor is in the echo area, |
8915 | then we can't just move the cursor. */ | |
bd66d1ba RS |
8916 | else if (! (!NILP (Vtransient_mark_mode) |
8917 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 8918 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 8919 | || highlight_nonselected_windows) |
8b51f1e3 | 8920 | && NILP (w->region_showing) |
8f897821 | 8921 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 8922 | && !cursor_in_echo_area) |
a2889657 | 8923 | { |
5f5c8ee5 GM |
8924 | struct it it; |
8925 | struct glyph_row *row; | |
8926 | ||
8927 | /* Skip from tlbufpos to PT and see where it is. Note that | |
8928 | PT may be in invisible text. If so, we will end at the | |
8929 | next visible position. */ | |
8930 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
8931 | NULL, DEFAULT_FACE_ID); | |
8932 | it.current_x = this_line_start_x; | |
8933 | it.current_y = this_line_y; | |
8934 | it.vpos = this_line_vpos; | |
2311178e | 8935 | |
5f5c8ee5 GM |
8936 | /* The call to move_it_to stops in front of PT, but |
8937 | moves over before-strings. */ | |
8938 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
8939 | ||
8940 | if (it.vpos == this_line_vpos | |
8941 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
8942 | row->enabled_p)) | |
a2889657 | 8943 | { |
5f5c8ee5 GM |
8944 | xassert (this_line_vpos == it.vpos); |
8945 | xassert (this_line_y == it.current_y); | |
8946 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
8947 | #if GLYPH_DEBUG |
8948 | *w->desired_matrix->method = 0; | |
8949 | debug_method_add (w, "optimization 3"); | |
8950 | #endif | |
a2889657 JB |
8951 | goto update; |
8952 | } | |
8953 | else | |
8954 | goto cancel; | |
8955 | } | |
5f5c8ee5 | 8956 | |
a2889657 | 8957 | cancel: |
5f5c8ee5 GM |
8958 | /* Text changed drastically or point moved off of line. */ |
8959 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
8960 | } |
8961 | ||
5f5c8ee5 GM |
8962 | CHARPOS (this_line_start_pos) = 0; |
8963 | consider_all_windows_p |= buffer_shared > 1; | |
8964 | ++clear_face_cache_count; | |
a2889657 | 8965 | |
2311178e | 8966 | |
bd9d0f3f GM |
8967 | /* Build desired matrices, and update the display. If |
8968 | consider_all_windows_p is non-zero, do it for all windows on all | |
8969 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 8970 | |
5f5c8ee5 | 8971 | if (consider_all_windows_p) |
a2889657 | 8972 | { |
35f56f96 | 8973 | Lisp_Object tail, frame; |
0528abe1 GM |
8974 | int i, n = 0, size = 50; |
8975 | struct frame **updated | |
8976 | = (struct frame **) alloca (size * sizeof *updated); | |
a2889657 | 8977 | |
5f5c8ee5 GM |
8978 | /* Clear the face cache eventually. */ |
8979 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 8980 | { |
5f5c8ee5 | 8981 | clear_face_cache (0); |
463f6b91 RS |
8982 | clear_face_cache_count = 0; |
8983 | } | |
31b24551 | 8984 | |
5f5c8ee5 GM |
8985 | /* Recompute # windows showing selected buffer. This will be |
8986 | incremented each time such a window is displayed. */ | |
a2889657 JB |
8987 | buffer_shared = 0; |
8988 | ||
35f56f96 | 8989 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 8990 | { |
5f5c8ee5 | 8991 | struct frame *f = XFRAME (frame); |
2311178e | 8992 | |
886bd6f2 | 8993 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 8994 | { |
ae02e06a | 8995 | #ifdef HAVE_WINDOW_SYSTEM |
bb336f8d RS |
8996 | if (clear_face_cache_count % 50 == 0 |
8997 | && FRAME_WINDOW_P (f)) | |
8998 | clear_image_cache (f, 0); | |
ae02e06a | 8999 | #endif /* HAVE_WINDOW_SYSTEM */ |
bb336f8d | 9000 | |
5f5c8ee5 GM |
9001 | /* Mark all the scroll bars to be removed; we'll redeem |
9002 | the ones we want when we redisplay their windows. */ | |
9769686d | 9003 | if (condemn_scroll_bars_hook) |
504454e8 | 9004 | condemn_scroll_bars_hook (f); |
30c566e4 | 9005 | |
f21ef775 | 9006 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 9007 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 9008 | |
5f5c8ee5 GM |
9009 | /* Any scroll bars which redisplay_windows should have |
9010 | nuked should now go away. */ | |
9769686d | 9011 | if (judge_scroll_bars_hook) |
504454e8 | 9012 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
9013 | |
9014 | /* If fonts changed, display again. */ | |
b60c9653 RS |
9015 | /* ??? rms: I suspect it is a mistake to jump all the way |
9016 | back to retry here. It should just retry this frame. */ | |
bd9d0f3f GM |
9017 | if (fonts_changed_p) |
9018 | goto retry; | |
2311178e | 9019 | |
bd9d0f3f GM |
9020 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
9021 | { | |
9022 | /* See if we have to hscroll. */ | |
9023 | if (hscroll_windows (f->root_window)) | |
9024 | goto retry; | |
9025 | ||
9026 | /* Prevent various kinds of signals during display | |
9027 | update. stdio is not robust about handling | |
9028 | signals, which can cause an apparent I/O | |
9029 | error. */ | |
9030 | if (interrupt_input) | |
9031 | unrequest_sigio (); | |
aac2d8b2 | 9032 | STOP_POLLING; |
bd9d0f3f GM |
9033 | |
9034 | /* Update the display. */ | |
9035 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
9036 | pause |= update_frame (f, 0, 0); | |
9037 | if (pause) | |
9038 | break; | |
9039 | ||
0528abe1 GM |
9040 | if (n == size) |
9041 | { | |
9042 | int nbytes = size * sizeof *updated; | |
9043 | struct frame **p = (struct frame **) alloca (2 * nbytes); | |
9044 | bcopy (updated, p, nbytes); | |
9045 | size *= 2; | |
9046 | } | |
2311178e | 9047 | |
0528abe1 | 9048 | updated[n++] = f; |
bd9d0f3f | 9049 | } |
9769686d | 9050 | } |
30c566e4 | 9051 | } |
0528abe1 GM |
9052 | |
9053 | /* Do the mark_window_display_accurate after all windows have | |
9054 | been redisplayed because this call resets flags in buffers | |
9055 | which are needed for proper redisplay. */ | |
9056 | for (i = 0; i < n; ++i) | |
9057 | { | |
9058 | struct frame *f = updated[i]; | |
9059 | mark_window_display_accurate (f->root_window, 1); | |
9060 | if (frame_up_to_date_hook) | |
9061 | frame_up_to_date_hook (f); | |
9062 | } | |
a2889657 | 9063 | } |
bd9d0f3f GM |
9064 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
9065 | { | |
9066 | Lisp_Object mini_window; | |
9067 | struct frame *mini_frame; | |
5f5c8ee5 | 9068 | |
82a7ab23 | 9069 | displayed_buffer = XBUFFER (XWINDOW (selected_window)->buffer); |
7033d6df RS |
9070 | /* Use list_of_error, not Qerror, so that |
9071 | we catch only errors and don't run the debugger. */ | |
9072 | internal_condition_case_1 (redisplay_window_1, selected_window, | |
9073 | list_of_error, | |
82a7ab23 | 9074 | redisplay_window_error); |
2311178e | 9075 | |
bd9d0f3f | 9076 | /* Compare desired and current matrices, perform output. */ |
7d0393cf | 9077 | |
26683087 | 9078 | update: |
bd9d0f3f GM |
9079 | /* If fonts changed, display again. */ |
9080 | if (fonts_changed_p) | |
92a90e89 | 9081 | goto retry; |
a2889657 | 9082 | |
bd9d0f3f GM |
9083 | /* Prevent various kinds of signals during display update. |
9084 | stdio is not robust about handling signals, | |
9085 | which can cause an apparent I/O error. */ | |
9086 | if (interrupt_input) | |
9087 | unrequest_sigio (); | |
aac2d8b2 | 9088 | STOP_POLLING; |
1af9f229 | 9089 | |
bd9d0f3f | 9090 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 9091 | { |
92a90e89 GM |
9092 | if (hscroll_windows (selected_window)) |
9093 | goto retry; | |
2311178e | 9094 | |
5f5c8ee5 | 9095 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 9096 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 9097 | } |
d724d989 | 9098 | |
8de2d90b | 9099 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
9100 | function. If the echo area is on another frame, that may |
9101 | have put text on a frame other than the selected one, so the | |
9102 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 9103 | it here. */ |
bd9d0f3f GM |
9104 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
9105 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
2311178e | 9106 | |
bd9d0f3f GM |
9107 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
9108 | { | |
9109 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
9110 | pause |= update_frame (mini_frame, 0, 0); | |
9111 | if (!pause && hscroll_windows (mini_window)) | |
9112 | goto retry; | |
9113 | } | |
6e8290aa | 9114 | } |
a2889657 | 9115 | |
5f5c8ee5 GM |
9116 | /* If display was paused because of pending input, make sure we do a |
9117 | thorough update the next time. */ | |
a2889657 JB |
9118 | if (pause) |
9119 | { | |
5f5c8ee5 GM |
9120 | /* Prevent the optimization at the beginning of |
9121 | redisplay_internal that tries a single-line update of the | |
9122 | line containing the cursor in the selected window. */ | |
9123 | CHARPOS (this_line_start_pos) = 0; | |
9124 | ||
9125 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 9126 | if (!NILP (last_arrow_position)) |
a2889657 JB |
9127 | { |
9128 | last_arrow_position = Qt; | |
9129 | last_arrow_string = Qt; | |
9130 | } | |
2311178e | 9131 | |
5f5c8ee5 GM |
9132 | /* If we pause after scrolling, some rows in the current |
9133 | matrices of some windows are not valid. */ | |
9134 | if (!WINDOW_FULL_WIDTH_P (w) | |
9135 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
9136 | update_mode_lines = 1; |
9137 | } | |
43c09969 | 9138 | else |
a2889657 | 9139 | { |
43c09969 | 9140 | if (!consider_all_windows_p) |
a2889657 | 9141 | { |
43c09969 GM |
9142 | /* This has already been done above if |
9143 | consider_all_windows_p is set. */ | |
9144 | mark_window_display_accurate_1 (w, 1); | |
2311178e | 9145 | |
927c5b3b GM |
9146 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
9147 | last_arrow_string = Voverlay_arrow_string; | |
2311178e | 9148 | |
efc63ef0 | 9149 | if (frame_up_to_date_hook != 0) |
43c09969 | 9150 | frame_up_to_date_hook (sf); |
a2889657 | 9151 | } |
15e26c76 | 9152 | |
a2889657 JB |
9153 | update_mode_lines = 0; |
9154 | windows_or_buffers_changed = 0; | |
5fb96e96 | 9155 | cursor_type_changed = 0; |
a2889657 JB |
9156 | } |
9157 | ||
5f5c8ee5 GM |
9158 | /* Start SIGIO interrupts coming again. Having them off during the |
9159 | code above makes it less likely one will discard output, but not | |
9160 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 9161 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
9162 | if (interrupt_input) |
9163 | request_sigio (); | |
aac2d8b2 | 9164 | RESUME_POLLING; |
a2889657 | 9165 | |
5f5c8ee5 GM |
9166 | /* If a frame has become visible which was not before, redisplay |
9167 | again, so that we display it. Expose events for such a frame | |
9168 | (which it gets when becoming visible) don't call the parts of | |
9169 | redisplay constructing glyphs, so simply exposing a frame won't | |
9170 | display anything in this case. So, we have to display these | |
9171 | frames here explicitly. */ | |
11c52c4f RS |
9172 | if (!pause) |
9173 | { | |
9174 | Lisp_Object tail, frame; | |
9175 | int new_count = 0; | |
9176 | ||
9177 | FOR_EACH_FRAME (tail, frame) | |
9178 | { | |
9179 | int this_is_visible = 0; | |
8e83f802 RS |
9180 | |
9181 | if (XFRAME (frame)->visible) | |
9182 | this_is_visible = 1; | |
9183 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
9184 | if (XFRAME (frame)->visible) | |
9185 | this_is_visible = 1; | |
11c52c4f RS |
9186 | |
9187 | if (this_is_visible) | |
9188 | new_count++; | |
9189 | } | |
9190 | ||
89819bdd | 9191 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
9192 | windows_or_buffers_changed++; |
9193 | } | |
9194 | ||
44fa5b1e | 9195 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 9196 | do_pending_window_change (1); |
d8e242fd | 9197 | |
8b32d885 RS |
9198 | /* If we just did a pending size change, or have additional |
9199 | visible frames, redisplay again. */ | |
3c8c72e0 | 9200 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 9201 | goto retry; |
5f5c8ee5 | 9202 | |
1987b083 | 9203 | end_of_redisplay: |
28514cd9 | 9204 | unbind_to (count, Qnil); |
aac2d8b2 | 9205 | RESUME_POLLING; |
a2889657 JB |
9206 | } |
9207 | ||
5f5c8ee5 GM |
9208 | |
9209 | /* Redisplay, but leave alone any recent echo area message unless | |
9210 | another message has been requested in its place. | |
a2889657 JB |
9211 | |
9212 | This is useful in situations where you need to redisplay but no | |
9213 | user action has occurred, making it inappropriate for the message | |
9214 | area to be cleared. See tracking_off and | |
9bf76936 GM |
9215 | wait_reading_process_input for examples of these situations. |
9216 | ||
9217 | FROM_WHERE is an integer saying from where this function was | |
9218 | called. This is useful for debugging. */ | |
a2889657 | 9219 | |
8991bb31 | 9220 | void |
9bf76936 GM |
9221 | redisplay_preserve_echo_area (from_where) |
9222 | int from_where; | |
a2889657 | 9223 | { |
9bf76936 GM |
9224 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
9225 | ||
c6e89d6c | 9226 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 9227 | { |
c6e89d6c GM |
9228 | /* We have a previously displayed message, but no current |
9229 | message. Redisplay the previous message. */ | |
9230 | display_last_displayed_message_p = 1; | |
e9874cee | 9231 | redisplay_internal (1); |
c6e89d6c | 9232 | display_last_displayed_message_p = 0; |
a2889657 JB |
9233 | } |
9234 | else | |
e9874cee | 9235 | redisplay_internal (1); |
a2889657 JB |
9236 | } |
9237 | ||
5f5c8ee5 | 9238 | |
28514cd9 | 9239 | /* Function registered with record_unwind_protect in |
acfca545 RS |
9240 | redisplay_internal. Reset redisplaying_p to the value it had |
9241 | before redisplay_internal was called, and clear | |
26683087 | 9242 | prevent_freeing_realized_faces_p. */ |
28514cd9 GM |
9243 | |
9244 | static Lisp_Object | |
9245 | unwind_redisplay (old_redisplaying_p) | |
9246 | Lisp_Object old_redisplaying_p; | |
9247 | { | |
9248 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 9249 | return Qnil; |
28514cd9 GM |
9250 | } |
9251 | ||
9252 | ||
43c09969 GM |
9253 | /* Mark the display of window W as accurate or inaccurate. If |
9254 | ACCURATE_P is non-zero mark display of W as accurate. If | |
9255 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
9256 | redisplay_internal is called. */ | |
5f5c8ee5 | 9257 | |
43c09969 GM |
9258 | static void |
9259 | mark_window_display_accurate_1 (w, accurate_p) | |
9260 | struct window *w; | |
5f5c8ee5 | 9261 | int accurate_p; |
a2889657 | 9262 | { |
43c09969 | 9263 | if (BUFFERP (w->buffer)) |
a2889657 | 9264 | { |
43c09969 | 9265 | struct buffer *b = XBUFFER (w->buffer); |
2311178e | 9266 | |
43c09969 GM |
9267 | w->last_modified |
9268 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
9269 | w->last_overlay_modified | |
9270 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
9271 | w->last_had_star | |
9272 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 9273 | |
43c09969 | 9274 | if (accurate_p) |
bd66d1ba | 9275 | { |
43c09969 GM |
9276 | b->clip_changed = 0; |
9277 | b->prevent_redisplay_optimizations_p = 0; | |
9278 | ||
9279 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
9280 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
9281 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
9282 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
2311178e | 9283 | |
43c09969 GM |
9284 | w->current_matrix->buffer = b; |
9285 | w->current_matrix->begv = BUF_BEGV (b); | |
9286 | w->current_matrix->zv = BUF_ZV (b); | |
2311178e | 9287 | |
43c09969 GM |
9288 | w->last_cursor = w->cursor; |
9289 | w->last_cursor_off_p = w->cursor_off_p; | |
2311178e | 9290 | |
43c09969 GM |
9291 | if (w == XWINDOW (selected_window)) |
9292 | w->last_point = make_number (BUF_PT (b)); | |
9293 | else | |
9294 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 9295 | } |
43c09969 | 9296 | } |
bd66d1ba | 9297 | |
43c09969 GM |
9298 | if (accurate_p) |
9299 | { | |
d2f84654 | 9300 | w->window_end_valid = w->buffer; |
99332eb6 | 9301 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 GM |
9302 | xassert (XINT (w->window_end_vpos) |
9303 | < (XINT (w->height) | |
9304 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); | |
99332eb6 | 9305 | #endif |
a2889657 | 9306 | w->update_mode_line = Qnil; |
43c09969 GM |
9307 | } |
9308 | } | |
9309 | ||
9310 | ||
9311 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
9312 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
9313 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
9314 | be redisplayed the next time redisplay_internal is called. */ | |
9315 | ||
9316 | void | |
9317 | mark_window_display_accurate (window, accurate_p) | |
9318 | Lisp_Object window; | |
9319 | int accurate_p; | |
9320 | { | |
9321 | struct window *w; | |
2311178e | 9322 | |
43c09969 GM |
9323 | for (; !NILP (window); window = w->next) |
9324 | { | |
9325 | w = XWINDOW (window); | |
9326 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 9327 | |
265a9e55 | 9328 | if (!NILP (w->vchild)) |
5f5c8ee5 | 9329 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 9330 | if (!NILP (w->hchild)) |
5f5c8ee5 | 9331 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
9332 | } |
9333 | ||
5f5c8ee5 | 9334 | if (accurate_p) |
a2889657 | 9335 | { |
d45de95b | 9336 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
9337 | last_arrow_string = Voverlay_arrow_string; |
9338 | } | |
9339 | else | |
9340 | { | |
5f5c8ee5 GM |
9341 | /* Force a thorough redisplay the next time by setting |
9342 | last_arrow_position and last_arrow_string to t, which is | |
4b41cebb | 9343 | unequal to any useful value of Voverlay_arrow_... */ |
a2889657 JB |
9344 | last_arrow_position = Qt; |
9345 | last_arrow_string = Qt; | |
9346 | } | |
9347 | } | |
5f5c8ee5 GM |
9348 | |
9349 | ||
9350 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
9351 | C. Since a display table doesn't have any parent, we don't have to | |
9352 | follow parent. Do not call this function directly but use the | |
9353 | macro DISP_CHAR_VECTOR. */ | |
9354 | ||
9355 | Lisp_Object | |
9356 | disp_char_vector (dp, c) | |
9357 | struct Lisp_Char_Table *dp; | |
9358 | int c; | |
9359 | { | |
9360 | int code[4], i; | |
9361 | Lisp_Object val; | |
9362 | ||
9363 | if (SINGLE_BYTE_CHAR_P (c)) | |
9364 | return (dp->contents[c]); | |
2311178e | 9365 | |
c5924f47 | 9366 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
9367 | if (code[1] < 32) |
9368 | code[1] = -1; | |
9369 | else if (code[2] < 32) | |
9370 | code[2] = -1; | |
2311178e | 9371 | |
5f5c8ee5 GM |
9372 | /* Here, the possible range of code[0] (== charset ID) is |
9373 | 128..max_charset. Since the top level char table contains data | |
9374 | for multibyte characters after 256th element, we must increment | |
9375 | code[0] by 128 to get a correct index. */ | |
9376 | code[0] += 128; | |
9377 | code[3] = -1; /* anchor */ | |
9378 | ||
9379 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
9380 | { | |
9381 | val = dp->contents[code[i]]; | |
9382 | if (!SUB_CHAR_TABLE_P (val)) | |
9383 | return (NILP (val) ? dp->defalt : val); | |
9384 | } | |
2311178e | 9385 | |
5f5c8ee5 GM |
9386 | /* Here, val is a sub char table. We return the default value of |
9387 | it. */ | |
9388 | return (dp->defalt); | |
9389 | } | |
9390 | ||
9391 | ||
a2889657 | 9392 | \f |
5f5c8ee5 GM |
9393 | /*********************************************************************** |
9394 | Window Redisplay | |
9395 | ***********************************************************************/ | |
a2725ab2 | 9396 | |
5f5c8ee5 | 9397 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
9398 | |
9399 | static void | |
5f5c8ee5 GM |
9400 | redisplay_windows (window) |
9401 | Lisp_Object window; | |
90adcf20 | 9402 | { |
5f5c8ee5 GM |
9403 | while (!NILP (window)) |
9404 | { | |
9405 | struct window *w = XWINDOW (window); | |
2311178e | 9406 | |
5f5c8ee5 GM |
9407 | if (!NILP (w->hchild)) |
9408 | redisplay_windows (w->hchild); | |
9409 | else if (!NILP (w->vchild)) | |
9410 | redisplay_windows (w->vchild); | |
9411 | else | |
82a7ab23 RS |
9412 | { |
9413 | displayed_buffer = XBUFFER (w->buffer); | |
7033d6df RS |
9414 | /* Use list_of_error, not Qerror, so that |
9415 | we catch only errors and don't run the debugger. */ | |
2311178e | 9416 | internal_condition_case_1 (redisplay_window_0, window, |
7033d6df | 9417 | list_of_error, |
82a7ab23 RS |
9418 | redisplay_window_error); |
9419 | } | |
a2725ab2 | 9420 | |
5f5c8ee5 GM |
9421 | window = w->next; |
9422 | } | |
9423 | } | |
9424 | ||
82a7ab23 RS |
9425 | static Lisp_Object |
9426 | redisplay_window_error () | |
9427 | { | |
9428 | displayed_buffer->display_error_modiff = BUF_MODIFF (displayed_buffer); | |
9429 | return Qnil; | |
9430 | } | |
9431 | ||
9432 | static Lisp_Object | |
9433 | redisplay_window_0 (window) | |
9434 | Lisp_Object window; | |
9435 | { | |
9436 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9437 | redisplay_window (window, 0); | |
9438 | return Qnil; | |
9439 | } | |
5f5c8ee5 | 9440 | |
82a7ab23 RS |
9441 | static Lisp_Object |
9442 | redisplay_window_1 (window) | |
9443 | Lisp_Object window; | |
9444 | { | |
9445 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9446 | redisplay_window (window, 1); | |
9447 | return Qnil; | |
9448 | } | |
9449 | \f | |
bc6371a6 KH |
9450 | |
9451 | /* Increment GLYPH until it reaches END or CONDITION fails while | |
9452 | adding (GLYPH)->pixel_width to X. */ | |
9453 | ||
9454 | #define SKIP_GLYPHS(glyph, end, x, condition) \ | |
9455 | do \ | |
9456 | { \ | |
9457 | (x) += (glyph)->pixel_width; \ | |
9458 | ++(glyph); \ | |
9459 | } \ | |
9460 | while ((glyph) < (end) && (condition)) | |
9461 | ||
9462 | ||
5f5c8ee5 GM |
9463 | /* Set cursor position of W. PT is assumed to be displayed in ROW. |
9464 | DELTA is the number of bytes by which positions recorded in ROW | |
9465 | differ from current buffer positions. */ | |
9466 | ||
9467 | void | |
9468 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
9469 | struct window *w; | |
9470 | struct glyph_row *row; | |
9471 | struct glyph_matrix *matrix; | |
9472 | int delta, delta_bytes, dy, dvpos; | |
9473 | { | |
9474 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
9475 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
ae73dc1c KH |
9476 | /* The first glyph that starts a sequence of glyphs from string. */ |
9477 | struct glyph *string_start; | |
9478 | /* The X coordinate of string_start. */ | |
9479 | int string_start_x; | |
9480 | /* The last known character position. */ | |
9481 | int last_pos = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9482 | /* The last known character position before string_start. */ | |
9483 | int string_before_pos; | |
5f5c8ee5 GM |
9484 | int x = row->x; |
9485 | int pt_old = PT - delta; | |
9486 | ||
9487 | /* Skip over glyphs not having an object at the start of the row. | |
9488 | These are special glyphs like truncation marks on terminal | |
9489 | frames. */ | |
9490 | if (row->displays_text_p) | |
9491 | while (glyph < end | |
6fc556fd | 9492 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
9493 | && glyph->charpos < 0) |
9494 | { | |
9495 | x += glyph->pixel_width; | |
9496 | ++glyph; | |
9497 | } | |
9498 | ||
ae73dc1c | 9499 | string_start = NULL; |
5f5c8ee5 | 9500 | while (glyph < end |
6fc556fd | 9501 | && !INTEGERP (glyph->object) |
5f5c8ee5 | 9502 | && (!BUFFERP (glyph->object) |
ae73dc1c | 9503 | || (last_pos = glyph->charpos) < pt_old)) |
5f5c8ee5 | 9504 | { |
ae73dc1c KH |
9505 | if (! STRINGP (glyph->object)) |
9506 | { | |
9507 | string_start = NULL; | |
9508 | x += glyph->pixel_width; | |
9509 | ++glyph; | |
9510 | } | |
9511 | else | |
9512 | { | |
9513 | string_before_pos = last_pos; | |
9514 | string_start = glyph; | |
9515 | string_start_x = x; | |
9516 | /* Skip all glyphs from string. */ | |
bc6371a6 | 9517 | SKIP_GLYPHS (glyph, end, x, STRINGP (glyph->object)); |
ae73dc1c KH |
9518 | } |
9519 | } | |
9520 | ||
9521 | if (string_start | |
9522 | && (glyph == end || !BUFFERP (glyph->object) || last_pos > pt_old)) | |
9523 | { | |
9524 | /* We may have skipped over point because the previous glyphs | |
9525 | are from string. As there's no easy way to know the | |
9526 | character position of the current glyph, find the correct | |
9527 | glyph on point by scanning from string_start again. */ | |
bc6371a6 KH |
9528 | Lisp_Object limit; |
9529 | Lisp_Object string; | |
9530 | int pos; | |
ae73dc1c | 9531 | |
bc6371a6 KH |
9532 | limit = make_number (pt_old + 1); |
9533 | end = glyph; | |
ae73dc1c KH |
9534 | glyph = string_start; |
9535 | x = string_start_x; | |
bc6371a6 KH |
9536 | string = glyph->object; |
9537 | pos = string_buffer_position (w, string, string_before_pos); | |
9538 | /* If STRING is from overlay, LAST_POS == 0. We skip such glyphs | |
9539 | because we always put cursor after overlay strings. */ | |
9540 | while (pos == 0 && glyph < end) | |
ae73dc1c | 9541 | { |
bc6371a6 KH |
9542 | string = glyph->object; |
9543 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
9544 | if (glyph < end) | |
9545 | pos = string_buffer_position (w, glyph->object, string_before_pos); | |
9546 | } | |
9547 | ||
9548 | while (glyph < end) | |
9549 | { | |
9550 | pos = XINT (Fnext_single_char_property_change | |
9551 | (make_number (pos), Qdisplay, Qnil, limit)); | |
9552 | if (pos > pt_old) | |
9553 | break; | |
ae73dc1c | 9554 | /* Skip glyphs from the same string. */ |
bc6371a6 KH |
9555 | string = glyph->object; |
9556 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
9557 | /* Skip glyphs from an overlay. */ | |
9558 | while (glyph < end | |
9559 | && ! string_buffer_position (w, glyph->object, pos)) | |
ae73dc1c | 9560 | { |
bc6371a6 KH |
9561 | string = glyph->object; |
9562 | SKIP_GLYPHS (glyph, end, x, EQ (glyph->object, string)); | |
ae73dc1c | 9563 | } |
ae73dc1c | 9564 | } |
5f5c8ee5 GM |
9565 | } |
9566 | ||
9567 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
9568 | w->cursor.x = x; | |
9569 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
9570 | w->cursor.y = row->y + dy; | |
9571 | ||
9572 | if (w == XWINDOW (selected_window)) | |
9573 | { | |
9574 | if (!row->continued_p | |
9575 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
9576 | && row->x == 0) | |
9577 | { | |
9578 | this_line_buffer = XBUFFER (w->buffer); | |
2311178e | 9579 | |
5f5c8ee5 GM |
9580 | CHARPOS (this_line_start_pos) |
9581 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9582 | BYTEPOS (this_line_start_pos) | |
9583 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
2311178e | 9584 | |
5f5c8ee5 GM |
9585 | CHARPOS (this_line_end_pos) |
9586 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
9587 | BYTEPOS (this_line_end_pos) | |
9588 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
2311178e | 9589 | |
5f5c8ee5 GM |
9590 | this_line_y = w->cursor.y; |
9591 | this_line_pixel_height = row->height; | |
9592 | this_line_vpos = w->cursor.vpos; | |
9593 | this_line_start_x = row->x; | |
9594 | } | |
9595 | else | |
9596 | CHARPOS (this_line_start_pos) = 0; | |
9597 | } | |
9598 | } | |
9599 | ||
9600 | ||
9601 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
9602 | start STARTP. Sets the window start of WINDOW to that position. |
9603 | ||
9604 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
9605 | |
9606 | static INLINE struct text_pos | |
9607 | run_window_scroll_functions (window, startp) | |
9608 | Lisp_Object window; | |
9609 | struct text_pos startp; | |
9610 | { | |
9611 | struct window *w = XWINDOW (window); | |
9612 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
9613 | |
9614 | if (current_buffer != XBUFFER (w->buffer)) | |
9615 | abort (); | |
9616 | ||
5f5c8ee5 GM |
9617 | if (!NILP (Vwindow_scroll_functions)) |
9618 | { | |
2311178e | 9619 | run_hook_with_args_2 (Qwindow_scroll_functions, window, |
5f5c8ee5 GM |
9620 | make_number (CHARPOS (startp))); |
9621 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
9622 | /* In case the hook functions switch buffers. */ |
9623 | if (current_buffer != XBUFFER (w->buffer)) | |
9624 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 9625 | } |
90adcf20 | 9626 | |
5f5c8ee5 GM |
9627 | return startp; |
9628 | } | |
9629 | ||
9630 | ||
ddf6b9a3 RS |
9631 | /* Make sure the line containing the cursor is fully visible. |
9632 | A value of 1 means there is nothing to be done. | |
9633 | (Either the line is fully visible, or it cannot be made so, | |
9634 | or we cannot tell.) | |
9635 | A value of 0 means the caller should do scrolling | |
9636 | as if point had gone off the screen. */ | |
5f5c8ee5 | 9637 | |
cb617e7c | 9638 | static int |
5f5c8ee5 GM |
9639 | make_cursor_line_fully_visible (w) |
9640 | struct window *w; | |
9641 | { | |
9642 | struct glyph_matrix *matrix; | |
9643 | struct glyph_row *row; | |
478d746b | 9644 | int window_height; |
2311178e | 9645 | |
5f5c8ee5 GM |
9646 | /* It's not always possible to find the cursor, e.g, when a window |
9647 | is full of overlay strings. Don't do anything in that case. */ | |
9648 | if (w->cursor.vpos < 0) | |
cb617e7c | 9649 | return 1; |
2311178e | 9650 | |
5f5c8ee5 GM |
9651 | matrix = w->desired_matrix; |
9652 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
9653 | ||
acda20e1 | 9654 | /* If the cursor row is not partially visible, there's nothing to do. */ |
b28cb6ed | 9655 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
cb617e7c | 9656 | return 1; |
b28cb6ed GM |
9657 | |
9658 | /* If the row the cursor is in is taller than the window's height, | |
9659 | it's not clear what to do, so do nothing. */ | |
9660 | window_height = window_box_height (w); | |
9661 | if (row->height >= window_height) | |
cb617e7c | 9662 | return 1; |
b28cb6ed | 9663 | |
ddf6b9a3 RS |
9664 | return 0; |
9665 | ||
9666 | #if 0 | |
9667 | /* This code used to try to scroll the window just enough to make | |
9668 | the line visible. It returned 0 to say that the caller should | |
9669 | allocate larger glyph matrices. */ | |
9670 | ||
b28cb6ed | 9671 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) |
5f5c8ee5 GM |
9672 | { |
9673 | int dy = row->height - row->visible_height; | |
9674 | w->vscroll = 0; | |
9675 | w->cursor.y += dy; | |
9676 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9677 | } | |
b28cb6ed | 9678 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
9679 | { |
9680 | int dy = - (row->height - row->visible_height); | |
9681 | w->vscroll = dy; | |
9682 | w->cursor.y += dy; | |
9683 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9684 | } | |
2311178e | 9685 | |
5f5c8ee5 GM |
9686 | /* When we change the cursor y-position of the selected window, |
9687 | change this_line_y as well so that the display optimization for | |
9688 | the cursor line of the selected window in redisplay_internal uses | |
9689 | the correct y-position. */ | |
9690 | if (w == XWINDOW (selected_window)) | |
9691 | this_line_y = w->cursor.y; | |
cb617e7c GM |
9692 | |
9693 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
9694 | redisplay with larger matrices. */ | |
9695 | if (matrix->nrows < required_matrix_height (w)) | |
9696 | { | |
9697 | fonts_changed_p = 1; | |
9698 | return 0; | |
9699 | } | |
9700 | ||
9701 | return 1; | |
ddf6b9a3 | 9702 | #endif /* 0 */ |
5f5c8ee5 GM |
9703 | } |
9704 | ||
9705 | ||
9706 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
9707 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
9708 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
9709 | in redisplay_window to bring a partially visible line into view in | |
9710 | the case that only the cursor has moved. | |
9711 | ||
03b0a4b4 RS |
9712 | LAST_LINE_MISFIT should be nonzero if we're scrolling because the |
9713 | last screen line's vertical height extends past the end of the screen. | |
9714 | ||
5f5c8ee5 GM |
9715 | Value is |
9716 | ||
9717 | 1 if scrolling succeeded | |
2311178e | 9718 | |
5f5c8ee5 | 9719 | 0 if scrolling didn't find point. |
2311178e | 9720 | |
5f5c8ee5 GM |
9721 | -1 if new fonts have been loaded so that we must interrupt |
9722 | redisplay, adjust glyph matrices, and try again. */ | |
9723 | ||
cb617e7c GM |
9724 | enum |
9725 | { | |
9726 | SCROLLING_SUCCESS, | |
9727 | SCROLLING_FAILED, | |
9728 | SCROLLING_NEED_LARGER_MATRICES | |
9729 | }; | |
9730 | ||
5f5c8ee5 GM |
9731 | static int |
9732 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
03b0a4b4 | 9733 | scroll_step, temp_scroll_step, last_line_misfit) |
5f5c8ee5 GM |
9734 | Lisp_Object window; |
9735 | int just_this_one_p; | |
31ade731 | 9736 | EMACS_INT scroll_conservatively, scroll_step; |
5f5c8ee5 | 9737 | int temp_scroll_step; |
03b0a4b4 | 9738 | int last_line_misfit; |
5f5c8ee5 GM |
9739 | { |
9740 | struct window *w = XWINDOW (window); | |
9741 | struct frame *f = XFRAME (w->frame); | |
9742 | struct text_pos scroll_margin_pos; | |
9743 | struct text_pos pos; | |
9744 | struct text_pos startp; | |
9745 | struct it it; | |
9746 | Lisp_Object window_end; | |
9747 | int this_scroll_margin; | |
9748 | int dy = 0; | |
9749 | int scroll_max; | |
b8a63ccb | 9750 | int rc; |
5f5c8ee5 GM |
9751 | int amount_to_scroll = 0; |
9752 | Lisp_Object aggressive; | |
9753 | int height; | |
03b0a4b4 | 9754 | int end_scroll_margin; |
5f5c8ee5 GM |
9755 | |
9756 | #if GLYPH_DEBUG | |
9757 | debug_method_add (w, "try_scrolling"); | |
78614721 | 9758 | #endif |
5f5c8ee5 GM |
9759 | |
9760 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
2311178e | 9761 | |
5f5c8ee5 GM |
9762 | /* Compute scroll margin height in pixels. We scroll when point is |
9763 | within this distance from the top or bottom of the window. */ | |
9764 | if (scroll_margin > 0) | |
90adcf20 | 9765 | { |
5f5c8ee5 GM |
9766 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
9767 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9768 | } | |
9769 | else | |
9770 | this_scroll_margin = 0; | |
9771 | ||
9772 | /* Compute how much we should try to scroll maximally to bring point | |
9773 | into view. */ | |
0894e696 SM |
9774 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
9775 | scroll_max = max (scroll_step, | |
9776 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
9777 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
9778 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
9779 | /* We're trying to scroll because of aggressive scrolling | |
9780 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
9781 | there should be a variable for this. */ | |
9782 | scroll_max = 10; | |
9783 | else | |
9784 | scroll_max = 0; | |
9785 | scroll_max *= CANON_Y_UNIT (f); | |
9786 | ||
9787 | /* Decide whether we have to scroll down. Start at the window end | |
9788 | and move this_scroll_margin up to find the position of the scroll | |
9789 | margin. */ | |
9790 | window_end = Fwindow_end (window, Qt); | |
03b0a4b4 RS |
9791 | |
9792 | too_near_end: | |
9793 | ||
5f5c8ee5 GM |
9794 | CHARPOS (scroll_margin_pos) = XINT (window_end); |
9795 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
03b0a4b4 RS |
9796 | |
9797 | end_scroll_margin = this_scroll_margin + !!last_line_misfit; | |
9798 | if (end_scroll_margin) | |
5f5c8ee5 GM |
9799 | { |
9800 | start_display (&it, w, scroll_margin_pos); | |
03b0a4b4 | 9801 | move_it_vertically (&it, - end_scroll_margin); |
5f5c8ee5 GM |
9802 | scroll_margin_pos = it.current.pos; |
9803 | } | |
9804 | ||
9805 | if (PT >= CHARPOS (scroll_margin_pos)) | |
9806 | { | |
9807 | int y0; | |
2311178e | 9808 | |
5f5c8ee5 GM |
9809 | /* Point is in the scroll margin at the bottom of the window, or |
9810 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 9811 | |
5f5c8ee5 GM |
9812 | /* Compute the distance from the scroll margin to PT. |
9813 | Give up if the distance is greater than scroll_max. */ | |
9814 | start_display (&it, w, scroll_margin_pos); | |
9815 | y0 = it.current_y; | |
9816 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
9817 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
539e92ad GM |
9818 | |
9819 | /* To make point visible, we have to move the window start | |
9820 | down so that the line the cursor is in is visible, which | |
9821 | means we have to add in the height of the cursor line. */ | |
9822 | dy = line_bottom_y (&it) - y0; | |
2311178e | 9823 | |
5f5c8ee5 | 9824 | if (dy > scroll_max) |
cb617e7c | 9825 | return SCROLLING_FAILED; |
2311178e | 9826 | |
5f5c8ee5 GM |
9827 | /* Move the window start down. If scrolling conservatively, |
9828 | move it just enough down to make point visible. If | |
9829 | scroll_step is set, move it down by scroll_step. */ | |
9830 | start_display (&it, w, startp); | |
9831 | ||
9832 | if (scroll_conservatively) | |
03b0a4b4 RS |
9833 | /* Set AMOUNT_TO_SCROLL to at least one line, |
9834 | and at most scroll_conservatively lines. */ | |
e89aaabd | 9835 | amount_to_scroll |
03b0a4b4 RS |
9836 | = min (max (dy, CANON_Y_UNIT (f)), |
9837 | CANON_Y_UNIT (f) * scroll_conservatively); | |
5f5c8ee5 GM |
9838 | else if (scroll_step || temp_scroll_step) |
9839 | amount_to_scroll = scroll_max; | |
9840 | else | |
90adcf20 | 9841 | { |
46226c1d | 9842 | aggressive = current_buffer->scroll_up_aggressively; |
5f5c8ee5 | 9843 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 9844 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9845 | if (NUMBERP (aggressive)) |
9846 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9847 | } | |
a2725ab2 | 9848 | |
5f5c8ee5 | 9849 | if (amount_to_scroll <= 0) |
cb617e7c | 9850 | return SCROLLING_FAILED; |
a2725ab2 | 9851 | |
03b0a4b4 RS |
9852 | /* If moving by amount_to_scroll leaves STARTP unchanged, |
9853 | move it down one screen line. */ | |
9854 | ||
5f5c8ee5 | 9855 | move_it_vertically (&it, amount_to_scroll); |
03b0a4b4 RS |
9856 | if (CHARPOS (it.current.pos) == CHARPOS (startp)) |
9857 | move_it_by_lines (&it, 1, 1); | |
5f5c8ee5 GM |
9858 | startp = it.current.pos; |
9859 | } | |
9860 | else | |
9861 | { | |
9862 | /* See if point is inside the scroll margin at the top of the | |
9863 | window. */ | |
9864 | scroll_margin_pos = startp; | |
9865 | if (this_scroll_margin) | |
9866 | { | |
9867 | start_display (&it, w, startp); | |
9868 | move_it_vertically (&it, this_scroll_margin); | |
9869 | scroll_margin_pos = it.current.pos; | |
9870 | } | |
9871 | ||
9872 | if (PT < CHARPOS (scroll_margin_pos)) | |
9873 | { | |
9874 | /* Point is in the scroll margin at the top of the window or | |
9875 | above what is displayed in the window. */ | |
9876 | int y0; | |
2311178e | 9877 | |
5f5c8ee5 GM |
9878 | /* Compute the vertical distance from PT to the scroll |
9879 | margin position. Give up if distance is greater than | |
9880 | scroll_max. */ | |
9881 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
9882 | start_display (&it, w, pos); | |
9883 | y0 = it.current_y; | |
9884 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
9885 | it.last_visible_y, -1, | |
9886 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
9887 | dy = it.current_y - y0; | |
9888 | if (dy > scroll_max) | |
cb617e7c | 9889 | return SCROLLING_FAILED; |
2311178e | 9890 | |
5f5c8ee5 GM |
9891 | /* Compute new window start. */ |
9892 | start_display (&it, w, startp); | |
2311178e | 9893 | |
5f5c8ee5 | 9894 | if (scroll_conservatively) |
0894e696 SM |
9895 | amount_to_scroll = |
9896 | max (dy, CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9897 | else if (scroll_step || temp_scroll_step) |
9898 | amount_to_scroll = scroll_max; | |
538f13d4 | 9899 | else |
5f5c8ee5 | 9900 | { |
46226c1d | 9901 | aggressive = current_buffer->scroll_down_aggressively; |
5f5c8ee5 | 9902 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 9903 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9904 | if (NUMBERP (aggressive)) |
9905 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9906 | } | |
a2725ab2 | 9907 | |
5f5c8ee5 | 9908 | if (amount_to_scroll <= 0) |
cb617e7c | 9909 | return SCROLLING_FAILED; |
2311178e | 9910 | |
5f5c8ee5 GM |
9911 | move_it_vertically (&it, - amount_to_scroll); |
9912 | startp = it.current.pos; | |
90adcf20 RS |
9913 | } |
9914 | } | |
a2889657 | 9915 | |
5f5c8ee5 GM |
9916 | /* Run window scroll functions. */ |
9917 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 9918 | |
5f5c8ee5 GM |
9919 | /* Display the window. Give up if new fonts are loaded, or if point |
9920 | doesn't appear. */ | |
9921 | if (!try_window (window, startp)) | |
cb617e7c | 9922 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
9923 | else if (w->cursor.vpos < 0) |
9924 | { | |
9925 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 9926 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
9927 | } |
9928 | else | |
9929 | { | |
9930 | /* Maybe forget recorded base line for line number display. */ | |
2311178e | 9931 | if (!just_this_one_p |
5f5c8ee5 | 9932 | || current_buffer->clip_changed |
9142dd5b | 9933 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 | 9934 | w->base_line_number = Qnil; |
2311178e | 9935 | |
ddf6b9a3 RS |
9936 | /* If cursor ends up on a partially visible line, |
9937 | treat that as being off the bottom of the screen. */ | |
9938 | if (! make_cursor_line_fully_visible (w)) | |
ef3c2c73 RS |
9939 | { |
9940 | clear_glyph_matrix (w->desired_matrix); | |
03b0a4b4 | 9941 | last_line_misfit = 1; |
ef3c2c73 RS |
9942 | goto too_near_end; |
9943 | } | |
ddf6b9a3 | 9944 | rc = SCROLLING_SUCCESS; |
5f5c8ee5 GM |
9945 | } |
9946 | ||
9947 | return rc; | |
a2889657 JB |
9948 | } |
9949 | ||
5f5c8ee5 GM |
9950 | |
9951 | /* Compute a suitable window start for window W if display of W starts | |
9952 | on a continuation line. Value is non-zero if a new window start | |
9953 | was computed. | |
9954 | ||
9955 | The new window start will be computed, based on W's width, starting | |
9956 | from the start of the continued line. It is the start of the | |
9957 | screen line with the minimum distance from the old start W->start. */ | |
9958 | ||
9959 | static int | |
9960 | compute_window_start_on_continuation_line (w) | |
9961 | struct window *w; | |
1f1ff51d | 9962 | { |
5f5c8ee5 GM |
9963 | struct text_pos pos, start_pos; |
9964 | int window_start_changed_p = 0; | |
1f1ff51d | 9965 | |
5f5c8ee5 | 9966 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 9967 | |
5f5c8ee5 | 9968 | /* If window start is on a continuation line... Window start may be |
2311178e | 9969 | < BEGV in case there's invisible text at the start of the |
5f5c8ee5 GM |
9970 | buffer (M-x rmail, for example). */ |
9971 | if (CHARPOS (start_pos) > BEGV | |
9972 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 9973 | { |
5f5c8ee5 GM |
9974 | struct it it; |
9975 | struct glyph_row *row; | |
f3751a65 GM |
9976 | |
9977 | /* Handle the case that the window start is out of range. */ | |
9978 | if (CHARPOS (start_pos) < BEGV) | |
9979 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
9980 | else if (CHARPOS (start_pos) > ZV) | |
9981 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
2311178e | 9982 | |
5f5c8ee5 GM |
9983 | /* Find the start of the continued line. This should be fast |
9984 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 9985 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
9986 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
9987 | row, DEFAULT_FACE_ID); | |
9988 | reseat_at_previous_visible_line_start (&it); | |
9989 | ||
9990 | /* If the line start is "too far" away from the window start, | |
9991 | say it takes too much time to compute a new window start. */ | |
9992 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
9993 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
9994 | { | |
9995 | int min_distance, distance; | |
2311178e | 9996 | |
5f5c8ee5 GM |
9997 | /* Move forward by display lines to find the new window |
9998 | start. If window width was enlarged, the new start can | |
9999 | be expected to be > the old start. If window width was | |
10000 | decreased, the new window start will be < the old start. | |
10001 | So, we're looking for the display line start with the | |
10002 | minimum distance from the old window start. */ | |
10003 | pos = it.current.pos; | |
10004 | min_distance = INFINITY; | |
10005 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
10006 | distance < min_distance) | |
10007 | { | |
10008 | min_distance = distance; | |
10009 | pos = it.current.pos; | |
10010 | move_it_by_lines (&it, 1, 0); | |
10011 | } | |
2311178e | 10012 | |
5f5c8ee5 GM |
10013 | /* Set the window start there. */ |
10014 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
10015 | window_start_changed_p = 1; | |
10016 | } | |
1f1ff51d | 10017 | } |
2311178e | 10018 | |
5f5c8ee5 | 10019 | return window_start_changed_p; |
1f1ff51d KH |
10020 | } |
10021 | ||
5f5c8ee5 | 10022 | |
1dd5768b | 10023 | /* Try cursor movement in case text has not changed in window WINDOW, |
47589c8c GM |
10024 | with window start STARTP. Value is |
10025 | ||
cb617e7c | 10026 | CURSOR_MOVEMENT_SUCCESS if successful |
2311178e | 10027 | |
cb617e7c GM |
10028 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
10029 | ||
10030 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
10031 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
10032 | we want to scroll as if scroll-step were set to 1. See the code. | |
10033 | ||
10034 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
10035 | which case we have to abort this redisplay, and adjust matrices | |
10036 | first. */ | |
10037 | ||
2311178e | 10038 | enum |
cb617e7c GM |
10039 | { |
10040 | CURSOR_MOVEMENT_SUCCESS, | |
10041 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
10042 | CURSOR_MOVEMENT_MUST_SCROLL, | |
10043 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
10044 | }; | |
47589c8c GM |
10045 | |
10046 | static int | |
10047 | try_cursor_movement (window, startp, scroll_step) | |
10048 | Lisp_Object window; | |
10049 | struct text_pos startp; | |
10050 | int *scroll_step; | |
10051 | { | |
10052 | struct window *w = XWINDOW (window); | |
10053 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 10054 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
2311178e | 10055 | |
69d1f7c9 | 10056 | #if GLYPH_DEBUG |
76cb5e06 GM |
10057 | if (inhibit_try_cursor_movement) |
10058 | return rc; | |
10059 | #endif | |
10060 | ||
47589c8c GM |
10061 | /* Handle case where text has not changed, only point, and it has |
10062 | not moved off the frame. */ | |
10063 | if (/* Point may be in this window. */ | |
10064 | PT >= CHARPOS (startp) | |
47589c8c GM |
10065 | /* Selective display hasn't changed. */ |
10066 | && !current_buffer->clip_changed | |
4db87380 GM |
10067 | /* Function force-mode-line-update is used to force a thorough |
10068 | redisplay. It sets either windows_or_buffers_changed or | |
10069 | update_mode_lines. So don't take a shortcut here for these | |
10070 | cases. */ | |
10071 | && !update_mode_lines | |
10072 | && !windows_or_buffers_changed | |
5fb96e96 | 10073 | && !cursor_type_changed |
2311178e | 10074 | /* Can't use this case if highlighting a region. When a |
47589c8c GM |
10075 | region exists, cursor movement has to do more than just |
10076 | set the cursor. */ | |
10077 | && !(!NILP (Vtransient_mark_mode) | |
10078 | && !NILP (current_buffer->mark_active)) | |
10079 | && NILP (w->region_showing) | |
10080 | && NILP (Vshow_trailing_whitespace) | |
10081 | /* Right after splitting windows, last_point may be nil. */ | |
10082 | && INTEGERP (w->last_point) | |
10083 | /* This code is not used for mini-buffer for the sake of the case | |
10084 | of redisplaying to replace an echo area message; since in | |
10085 | that case the mini-buffer contents per se are usually | |
10086 | unchanged. This code is of no real use in the mini-buffer | |
10087 | since the handling of this_line_start_pos, etc., in redisplay | |
10088 | handles the same cases. */ | |
10089 | && !EQ (window, minibuf_window) | |
10090 | /* When splitting windows or for new windows, it happens that | |
10091 | redisplay is called with a nil window_end_vpos or one being | |
10092 | larger than the window. This should really be fixed in | |
10093 | window.c. I don't have this on my list, now, so we do | |
10094 | approximately the same as the old redisplay code. --gerd. */ | |
10095 | && INTEGERP (w->window_end_vpos) | |
10096 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
10097 | && (FRAME_WINDOW_P (f) | |
10098 | || !MARKERP (Voverlay_arrow_position) | |
10099 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
10100 | { | |
10101 | int this_scroll_margin; | |
8ee5b6a3 | 10102 | struct glyph_row *row = NULL; |
47589c8c GM |
10103 | |
10104 | #if GLYPH_DEBUG | |
10105 | debug_method_add (w, "cursor movement"); | |
10106 | #endif | |
10107 | ||
10108 | /* Scroll if point within this distance from the top or bottom | |
10109 | of the window. This is a pixel value. */ | |
10110 | this_scroll_margin = max (0, scroll_margin); | |
10111 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
10112 | this_scroll_margin *= CANON_Y_UNIT (f); | |
10113 | ||
10114 | /* Start with the row the cursor was displayed during the last | |
10115 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
10116 | if (w->last_cursor.vpos < 0 |
10117 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 10118 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10119 | else |
10120 | { | |
10121 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
10122 | if (row->mode_line_p) | |
10123 | ++row; | |
10124 | if (!row->enabled_p) | |
cb617e7c | 10125 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10126 | } |
10127 | ||
cb617e7c | 10128 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
10129 | { |
10130 | int scroll_p = 0; | |
68c5d1db | 10131 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
2311178e | 10132 | |
47589c8c GM |
10133 | if (PT > XFASTINT (w->last_point)) |
10134 | { | |
10135 | /* Point has moved forward. */ | |
47589c8c GM |
10136 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
10137 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
10138 | { | |
10139 | xassert (row->enabled_p); | |
10140 | ++row; | |
10141 | } | |
10142 | ||
10143 | /* The end position of a row equals the start position | |
10144 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
10145 | display it in the next line. */ |
10146 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
10147 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
10148 | && !cursor_row_p (w, row)) | |
10149 | ++row; | |
47589c8c GM |
10150 | |
10151 | /* If within the scroll margin, scroll. Note that | |
10152 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
10153 | the next line would be drawn, and that | |
10154 | this_scroll_margin can be zero. */ | |
10155 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
10156 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
10157 | /* Line is completely visible last line in window | |
10158 | and PT is to be set in the next line. */ | |
10159 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
10160 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
10161 | && !row->ends_at_zv_p | |
10162 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
10163 | scroll_p = 1; | |
10164 | } | |
10165 | else if (PT < XFASTINT (w->last_point)) | |
10166 | { | |
10167 | /* Cursor has to be moved backward. Note that PT >= | |
10168 | CHARPOS (startp) because of the outer | |
10169 | if-statement. */ | |
10170 | while (!row->mode_line_p | |
10171 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
10172 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
10173 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
10174 | && (row->y > this_scroll_margin | |
10175 | || CHARPOS (startp) == BEGV)) | |
10176 | { | |
10177 | xassert (row->enabled_p); | |
10178 | --row; | |
10179 | } | |
10180 | ||
10181 | /* Consider the following case: Window starts at BEGV, | |
10182 | there is invisible, intangible text at BEGV, so that | |
10183 | display starts at some point START > BEGV. It can | |
10184 | happen that we are called with PT somewhere between | |
10185 | BEGV and START. Try to handle that case. */ | |
10186 | if (row < w->current_matrix->rows | |
10187 | || row->mode_line_p) | |
10188 | { | |
10189 | row = w->current_matrix->rows; | |
10190 | if (row->mode_line_p) | |
10191 | ++row; | |
10192 | } | |
10193 | ||
10194 | /* Due to newlines in overlay strings, we may have to | |
10195 | skip forward over overlay strings. */ | |
68c5d1db GM |
10196 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
10197 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
10198 | && !cursor_row_p (w, row)) | |
47589c8c | 10199 | ++row; |
2311178e | 10200 | |
47589c8c GM |
10201 | /* If within the scroll margin, scroll. */ |
10202 | if (row->y < this_scroll_margin | |
10203 | && CHARPOS (startp) != BEGV) | |
10204 | scroll_p = 1; | |
10205 | } | |
10206 | ||
10207 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
10208 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
10209 | { | |
10210 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 10211 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 10212 | } |
440fc135 | 10213 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c | 10214 | { |
8de4aaf8 GM |
10215 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
10216 | && !row->ends_at_zv_p | |
10217 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 10218 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 10219 | else if (row->height > window_box_height (w)) |
440fc135 | 10220 | { |
8de4aaf8 GM |
10221 | /* If we end up in a partially visible line, let's |
10222 | make it fully visible, except when it's taller | |
10223 | than the window, in which case we can't do much | |
10224 | about it. */ | |
440fc135 | 10225 | *scroll_step = 1; |
cb617e7c | 10226 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
10227 | } |
10228 | else | |
10229 | { | |
10230 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 10231 | if (!make_cursor_line_fully_visible (w)) |
ddf6b9a3 | 10232 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
cb617e7c GM |
10233 | else |
10234 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 10235 | } |
47589c8c GM |
10236 | } |
10237 | else if (scroll_p) | |
cb617e7c | 10238 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10239 | else |
10240 | { | |
10241 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 10242 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
10243 | } |
10244 | } | |
10245 | } | |
10246 | ||
10247 | return rc; | |
10248 | } | |
10249 | ||
10250 | ||
5f5c8ee5 | 10251 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
b60c9653 RS |
10252 | selected_window is redisplayed. |
10253 | ||
10254 | We can return without actually redisplaying the window if | |
10255 | fonts_changed_p is nonzero. In that case, redisplay_internal will | |
10256 | retry. */ | |
90adcf20 | 10257 | |
a2889657 | 10258 | static void |
5f5c8ee5 | 10259 | redisplay_window (window, just_this_one_p) |
a2889657 | 10260 | Lisp_Object window; |
5f5c8ee5 | 10261 | int just_this_one_p; |
a2889657 | 10262 | { |
5f5c8ee5 GM |
10263 | struct window *w = XWINDOW (window); |
10264 | struct frame *f = XFRAME (w->frame); | |
10265 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 10266 | struct buffer *old = current_buffer; |
5f5c8ee5 | 10267 | struct text_pos lpoint, opoint, startp; |
e481f960 | 10268 | int update_mode_line; |
5f5c8ee5 GM |
10269 | int tem; |
10270 | struct it it; | |
10271 | /* Record it now because it's overwritten. */ | |
10272 | int current_matrix_up_to_date_p = 0; | |
c62c1bb5 RS |
10273 | /* This is less strict than current_matrix_up_to_date_p. |
10274 | It indictes that the buffer contents and narrowing are unchanged. */ | |
10275 | int buffer_unchanged_p = 0; | |
5f5c8ee5 | 10276 | int temp_scroll_step = 0; |
331379bf | 10277 | int count = SPECPDL_INDEX (); |
47589c8c | 10278 | int rc; |
ddf6b9a3 | 10279 | int centering_position; |
03b0a4b4 | 10280 | int last_line_misfit = 0; |
a2889657 | 10281 | |
5f5c8ee5 GM |
10282 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
10283 | opoint = lpoint; | |
a2889657 | 10284 | |
5f5c8ee5 GM |
10285 | /* W must be a leaf window here. */ |
10286 | xassert (!NILP (w->buffer)); | |
10287 | #if GLYPH_DEBUG | |
10288 | *w->desired_matrix->method = 0; | |
10289 | #endif | |
2e54982e RS |
10290 | |
10291 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
10292 | |
10293 | reconsider_clip_changes (w, buffer); | |
2311178e TTN |
10294 | |
10295 | /* Has the mode line to be updated? */ | |
5f5c8ee5 GM |
10296 | update_mode_line = (!NILP (w->update_mode_line) |
10297 | || update_mode_lines | |
c62c1bb5 RS |
10298 | || buffer->clip_changed |
10299 | || buffer->prevent_redisplay_optimizations_p); | |
8de2d90b JB |
10300 | |
10301 | if (MINI_WINDOW_P (w)) | |
10302 | { | |
5f5c8ee5 | 10303 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 10304 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
10305 | { |
10306 | if (update_mode_line) | |
10307 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 10308 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
10309 | goto finish_menu_bars; |
10310 | else | |
10311 | /* We've already displayed the echo area glyphs in this window. */ | |
10312 | goto finish_scroll_bars; | |
10313 | } | |
b2b5455d RS |
10314 | else if ((w != XWINDOW (minibuf_window) |
10315 | || minibuf_level == 0) | |
3354fdcf RS |
10316 | /* Quail displays non-mini buffers in minibuffer window. |
10317 | In that case, redisplay the window normally. */ | |
b2b5455d | 10318 | && !NILP (Fmemq (w->buffer, Vminibuffer_list))) |
8de2d90b | 10319 | { |
3354fdcf RS |
10320 | /* W is a mini-buffer window, but it's not active, so clear |
10321 | it. */ | |
5f5c8ee5 GM |
10322 | int yb = window_text_bottom_y (w); |
10323 | struct glyph_row *row; | |
10324 | int y; | |
10325 | ||
10326 | for (y = 0, row = w->desired_matrix->rows; | |
10327 | y < yb; | |
10328 | y += row->height, ++row) | |
10329 | blank_row (w, row, y); | |
88f22aff | 10330 | goto finish_scroll_bars; |
8de2d90b | 10331 | } |
c095a1dd GM |
10332 | |
10333 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 10334 | } |
a2889657 | 10335 | |
5f5c8ee5 GM |
10336 | /* Otherwise set up data on this window; select its buffer and point |
10337 | value. */ | |
6a93695f GM |
10338 | /* Really select the buffer, for the sake of buffer-local |
10339 | variables. */ | |
10340 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
10341 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
10342 | ||
10343 | current_matrix_up_to_date_p | |
10344 | = (!NILP (w->window_end_valid) | |
10345 | && !current_buffer->clip_changed | |
c62c1bb5 | 10346 | && !current_buffer->prevent_redisplay_optimizations_p |
5f5c8ee5 GM |
10347 | && XFASTINT (w->last_modified) >= MODIFF |
10348 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 10349 | |
c62c1bb5 RS |
10350 | buffer_unchanged_p |
10351 | = (!NILP (w->window_end_valid) | |
10352 | && !current_buffer->clip_changed | |
3f1258d0 | 10353 | && XFASTINT (w->last_modified) >= MODIFF |
c62c1bb5 RS |
10354 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); |
10355 | ||
5f5c8ee5 GM |
10356 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
10357 | the window end being valid, so set it to nil there. */ | |
10358 | if (windows_or_buffers_changed) | |
10359 | { | |
10360 | /* If window starts on a continuation line, maybe adjust the | |
10361 | window start in case the window's width changed. */ | |
10362 | if (XMARKER (w->start)->buffer == current_buffer) | |
10363 | compute_window_start_on_continuation_line (w); | |
2311178e | 10364 | |
5f5c8ee5 GM |
10365 | w->window_end_valid = Qnil; |
10366 | } | |
12adba34 | 10367 | |
5f5c8ee5 GM |
10368 | /* Some sanity checks. */ |
10369 | CHECK_WINDOW_END (w); | |
10370 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 10371 | abort (); |
5f5c8ee5 | 10372 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 10373 | abort (); |
a2889657 | 10374 | |
28995e67 RS |
10375 | /* If %c is in mode line, update it if needed. */ |
10376 | if (!NILP (w->column_number_displayed) | |
10377 | /* This alternative quickly identifies a common case | |
10378 | where no change is needed. */ | |
10379 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
10380 | && XFASTINT (w->last_modified) >= MODIFF |
10381 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
2311178e TTN |
10382 | && (XFASTINT (w->column_number_displayed) |
10383 | != (int) current_column ())) /* iftc */ | |
10384 | update_mode_line = 1; | |
28995e67 | 10385 | |
5f5c8ee5 GM |
10386 | /* Count number of windows showing the selected buffer. An indirect |
10387 | buffer counts as its base buffer. */ | |
10388 | if (!just_this_one_p) | |
42640f83 RS |
10389 | { |
10390 | struct buffer *current_base, *window_base; | |
10391 | current_base = current_buffer; | |
10392 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
10393 | if (current_base->base_buffer) | |
10394 | current_base = current_base->base_buffer; | |
10395 | if (window_base->base_buffer) | |
10396 | window_base = window_base->base_buffer; | |
10397 | if (current_base == window_base) | |
10398 | buffer_shared++; | |
10399 | } | |
a2889657 | 10400 | |
5f5c8ee5 GM |
10401 | /* Point refers normally to the selected window. For any other |
10402 | window, set up appropriate value. */ | |
a2889657 JB |
10403 | if (!EQ (window, selected_window)) |
10404 | { | |
12adba34 RS |
10405 | int new_pt = XMARKER (w->pointm)->charpos; |
10406 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 10407 | if (new_pt < BEGV) |
a2889657 | 10408 | { |
f67a0f51 | 10409 | new_pt = BEGV; |
12adba34 RS |
10410 | new_pt_byte = BEGV_BYTE; |
10411 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 10412 | } |
f67a0f51 | 10413 | else if (new_pt > (ZV - 1)) |
a2889657 | 10414 | { |
f67a0f51 | 10415 | new_pt = ZV; |
12adba34 RS |
10416 | new_pt_byte = ZV_BYTE; |
10417 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 10418 | } |
2311178e | 10419 | |
f67a0f51 | 10420 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 10421 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
10422 | } |
10423 | ||
f4faa47c | 10424 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
10425 | have changed, invalidate the width run cache. It's true that |
10426 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
10427 | redisplay goes (non-fatally) haywire when the display table is |
10428 | changed, so why should we worry about doing any better? */ | |
10429 | if (current_buffer->width_run_cache) | |
10430 | { | |
f908610f | 10431 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
10432 | |
10433 | if (! disptab_matches_widthtab (disptab, | |
10434 | XVECTOR (current_buffer->width_table))) | |
10435 | { | |
10436 | invalidate_region_cache (current_buffer, | |
10437 | current_buffer->width_run_cache, | |
10438 | BEG, Z); | |
10439 | recompute_width_table (current_buffer, disptab); | |
10440 | } | |
10441 | } | |
10442 | ||
a2889657 | 10443 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
10444 | if (XMARKER (w->start)->buffer != current_buffer) |
10445 | goto recenter; | |
10446 | ||
5f5c8ee5 | 10447 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 10448 | |
cf0df6ab RS |
10449 | /* If someone specified a new starting point but did not insist, |
10450 | check whether it can be used. */ | |
cfad01b4 GM |
10451 | if (!NILP (w->optional_new_start) |
10452 | && CHARPOS (startp) >= BEGV | |
10453 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
10454 | { |
10455 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
10456 | start_display (&it, w, startp); |
10457 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10458 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10459 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
10460 | w->force_start = Qt; |
10461 | } | |
10462 | ||
8de2d90b | 10463 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 10464 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
10465 | if (!NILP (w->force_start) |
10466 | || w->frozen_window_start_p) | |
a2889657 | 10467 | { |
b60c9653 RS |
10468 | /* We set this later on if we have to adjust point. */ |
10469 | int new_vpos = -1; | |
10470 | ||
e63574d7 | 10471 | w->force_start = Qnil; |
5f5c8ee5 | 10472 | w->vscroll = 0; |
b5174a51 | 10473 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
10474 | |
10475 | /* Forget any recorded base line for line number display. */ | |
c62c1bb5 | 10476 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
10477 | w->base_line_number = Qnil; |
10478 | ||
75c43375 RS |
10479 | /* Redisplay the mode line. Select the buffer properly for that. |
10480 | Also, run the hook window-scroll-functions | |
10481 | because we have scrolled. */ | |
e63574d7 RS |
10482 | /* Note, we do this after clearing force_start because |
10483 | if there's an error, it is better to forget about force_start | |
10484 | than to get into an infinite loop calling the hook functions | |
10485 | and having them get more errors. */ | |
75c43375 RS |
10486 | if (!update_mode_line |
10487 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 10488 | { |
e481f960 RS |
10489 | update_mode_line = 1; |
10490 | w->update_mode_line = Qt; | |
5f5c8ee5 | 10491 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 10492 | } |
2311178e | 10493 | |
ac90c44f GM |
10494 | w->last_modified = make_number (0); |
10495 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
10496 | if (CHARPOS (startp) < BEGV) |
10497 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
10498 | else if (CHARPOS (startp) > ZV) | |
10499 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
2311178e TTN |
10500 | |
10501 | /* Redisplay, then check if cursor has been set during the | |
5f5c8ee5 GM |
10502 | redisplay. Give up if new fonts were loaded. */ |
10503 | if (!try_window (window, startp)) | |
10504 | { | |
10505 | w->force_start = Qt; | |
10506 | clear_glyph_matrix (w->desired_matrix); | |
b60c9653 | 10507 | goto need_larger_matrices; |
5f5c8ee5 GM |
10508 | } |
10509 | ||
9472f927 | 10510 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 10511 | { |
b28cb6ed GM |
10512 | /* If point does not appear, try to move point so it does |
10513 | appear. The desired matrix has been built above, so we | |
10514 | can use it here. */ | |
b60c9653 RS |
10515 | new_vpos = window_box_height (w) / 2; |
10516 | } | |
10517 | ||
10518 | if (!make_cursor_line_fully_visible (w)) | |
10519 | { | |
10520 | /* Point does appear, but on a line partly visible at end of window. | |
10521 | Move it back to a fully-visible line. */ | |
10522 | new_vpos = window_box_height (w); | |
10523 | } | |
10524 | ||
10525 | /* If we need to move point for either of the above reasons, | |
10526 | now actually do it. */ | |
10527 | if (new_vpos >= 0) | |
10528 | { | |
b28cb6ed GM |
10529 | struct glyph_row *row; |
10530 | ||
b28cb6ed | 10531 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); |
b60c9653 | 10532 | while (MATRIX_ROW_BOTTOM_Y (row) < new_vpos) |
5f5c8ee5 GM |
10533 | ++row; |
10534 | ||
10535 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
10536 | MATRIX_ROW_START_BYTEPOS (row)); | |
10537 | ||
90adcf20 | 10538 | if (w != XWINDOW (selected_window)) |
12adba34 | 10539 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
10540 | else if (current_buffer == old) |
10541 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
10542 | ||
10543 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
2311178e | 10544 | |
5f5c8ee5 GM |
10545 | /* If we are highlighting the region, then we just changed |
10546 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
10547 | if (!NILP (Vtransient_mark_mode) |
10548 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 10549 | { |
5f5c8ee5 GM |
10550 | clear_glyph_matrix (w->desired_matrix); |
10551 | if (!try_window (window, startp)) | |
cb617e7c | 10552 | goto need_larger_matrices; |
6f27fa9b | 10553 | } |
a2889657 | 10554 | } |
5f5c8ee5 | 10555 | |
5f5c8ee5 GM |
10556 | #if GLYPH_DEBUG |
10557 | debug_method_add (w, "forced window start"); | |
10558 | #endif | |
a2889657 JB |
10559 | goto done; |
10560 | } | |
10561 | ||
5f5c8ee5 | 10562 | /* Handle case where text has not changed, only point, and it has |
3f029ea0 RS |
10563 | not moved off the frame, and we are not retrying after hscroll. |
10564 | (current_matrix_up_to_date_p is nonzero when retrying.) */ | |
10565 | if (current_matrix_up_to_date_p | |
47589c8c | 10566 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 10567 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 10568 | { |
cb617e7c GM |
10569 | switch (rc) |
10570 | { | |
10571 | case CURSOR_MOVEMENT_SUCCESS: | |
10572 | goto done; | |
2311178e | 10573 | |
b60c9653 | 10574 | #if 0 /* try_cursor_movement never returns this value. */ |
cb617e7c GM |
10575 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: |
10576 | goto need_larger_matrices; | |
b60c9653 | 10577 | #endif |
2311178e | 10578 | |
cb617e7c GM |
10579 | case CURSOR_MOVEMENT_MUST_SCROLL: |
10580 | goto try_to_scroll; | |
2311178e | 10581 | |
cb617e7c GM |
10582 | default: |
10583 | abort (); | |
10584 | } | |
a2889657 JB |
10585 | } |
10586 | /* If current starting point was originally the beginning of a line | |
10587 | but no longer is, find a new starting point. */ | |
265a9e55 | 10588 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
10589 | && !(CHARPOS (startp) <= BEGV |
10590 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 10591 | { |
5f5c8ee5 GM |
10592 | #if GLYPH_DEBUG |
10593 | debug_method_add (w, "recenter 1"); | |
10594 | #endif | |
a2889657 JB |
10595 | goto recenter; |
10596 | } | |
2311178e | 10597 | |
27d16f05 GM |
10598 | /* Try scrolling with try_window_id. Value is > 0 if update has |
10599 | been done, it is -1 if we know that the same window start will | |
10600 | not work. It is 0 if unsuccessful for some other reason. */ | |
10601 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 10602 | { |
5f5c8ee5 | 10603 | #if GLYPH_DEBUG |
ef121659 | 10604 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
10605 | #endif |
10606 | ||
10607 | if (fonts_changed_p) | |
cb617e7c | 10608 | goto need_larger_matrices; |
a2889657 JB |
10609 | if (tem > 0) |
10610 | goto done; | |
ef121659 | 10611 | |
5f5c8ee5 GM |
10612 | /* Otherwise try_window_id has returned -1 which means that we |
10613 | don't want the alternative below this comment to execute. */ | |
a2889657 | 10614 | } |
5f5c8ee5 GM |
10615 | else if (CHARPOS (startp) >= BEGV |
10616 | && CHARPOS (startp) <= ZV | |
10617 | && PT >= CHARPOS (startp) | |
10618 | && (CHARPOS (startp) < ZV | |
e9874cee | 10619 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 10620 | || CHARPOS (startp) == BEGV |
8850a573 RS |
10621 | || (XFASTINT (w->last_modified) >= MODIFF |
10622 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 10623 | { |
5f5c8ee5 GM |
10624 | #if GLYPH_DEBUG |
10625 | debug_method_add (w, "same window start"); | |
10626 | #endif | |
2311178e | 10627 | |
5f5c8ee5 GM |
10628 | /* Try to redisplay starting at same place as before. |
10629 | If point has not moved off frame, accept the results. */ | |
10630 | if (!current_matrix_up_to_date_p | |
10631 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
10632 | because a window scroll function can have changed the |
10633 | buffer. */ | |
5f5c8ee5 GM |
10634 | || !NILP (Vwindow_scroll_functions) |
10635 | || MINI_WINDOW_P (w) | |
10636 | || !try_window_reusing_current_matrix (w)) | |
10637 | { | |
10638 | IF_DEBUG (debug_method_add (w, "1")); | |
10639 | try_window (window, startp); | |
10640 | } | |
10641 | ||
10642 | if (fonts_changed_p) | |
cb617e7c | 10643 | goto need_larger_matrices; |
2311178e | 10644 | |
5f5c8ee5 | 10645 | if (w->cursor.vpos >= 0) |
aa6d10fa | 10646 | { |
2311178e | 10647 | if (!just_this_one_p |
5f5c8ee5 | 10648 | || current_buffer->clip_changed |
9142dd5b | 10649 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
10650 | /* Forget any recorded base line for line number display. */ |
10651 | w->base_line_number = Qnil; | |
2311178e | 10652 | |
cb617e7c | 10653 | if (!make_cursor_line_fully_visible (w)) |
03b0a4b4 RS |
10654 | { |
10655 | clear_glyph_matrix (w->desired_matrix); | |
10656 | last_line_misfit = 1; | |
10657 | } | |
ddf6b9a3 | 10658 | /* Drop through and scroll. */ |
ef3c2c73 RS |
10659 | else |
10660 | goto done; | |
aa6d10fa | 10661 | } |
a2889657 | 10662 | else |
5f5c8ee5 | 10663 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
10664 | } |
10665 | ||
5f5c8ee5 GM |
10666 | try_to_scroll: |
10667 | ||
ac90c44f GM |
10668 | w->last_modified = make_number (0); |
10669 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 10670 | |
e481f960 RS |
10671 | /* Redisplay the mode line. Select the buffer properly for that. */ |
10672 | if (!update_mode_line) | |
10673 | { | |
e481f960 RS |
10674 | update_mode_line = 1; |
10675 | w->update_mode_line = Qt; | |
10676 | } | |
a2889657 | 10677 | |
5f5c8ee5 GM |
10678 | /* Try to scroll by specified few lines. */ |
10679 | if ((scroll_conservatively | |
10680 | || scroll_step | |
10681 | || temp_scroll_step | |
10682 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
10683 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 10684 | && !current_buffer->clip_changed |
2311178e | 10685 | && CHARPOS (startp) >= BEGV |
5f5c8ee5 | 10686 | && CHARPOS (startp) <= ZV) |
0789adb2 | 10687 | { |
5f5c8ee5 GM |
10688 | /* The function returns -1 if new fonts were loaded, 1 if |
10689 | successful, 0 if not successful. */ | |
10690 | int rc = try_scrolling (window, just_this_one_p, | |
10691 | scroll_conservatively, | |
10692 | scroll_step, | |
03b0a4b4 | 10693 | temp_scroll_step, last_line_misfit); |
cb617e7c GM |
10694 | switch (rc) |
10695 | { | |
10696 | case SCROLLING_SUCCESS: | |
10697 | goto done; | |
2311178e | 10698 | |
cb617e7c GM |
10699 | case SCROLLING_NEED_LARGER_MATRICES: |
10700 | goto need_larger_matrices; | |
2311178e | 10701 | |
cb617e7c GM |
10702 | case SCROLLING_FAILED: |
10703 | break; | |
2311178e | 10704 | |
cb617e7c GM |
10705 | default: |
10706 | abort (); | |
10707 | } | |
5f5c8ee5 | 10708 | } |
f9c8af06 | 10709 | |
5f5c8ee5 | 10710 | /* Finally, just choose place to start which centers point */ |
5936754e | 10711 | |
5f5c8ee5 | 10712 | recenter: |
ddf6b9a3 RS |
10713 | centering_position = window_box_height (w) / 2; |
10714 | ||
10715 | point_at_top: | |
10716 | /* Jump here with centering_position already set to 0. */ | |
44173109 | 10717 | |
5f5c8ee5 GM |
10718 | #if GLYPH_DEBUG |
10719 | debug_method_add (w, "recenter"); | |
10720 | #endif | |
0789adb2 | 10721 | |
5f5c8ee5 | 10722 | /* w->vscroll = 0; */ |
0789adb2 | 10723 | |
5f5c8ee5 | 10724 | /* Forget any previously recorded base line for line number display. */ |
c62c1bb5 | 10725 | if (!buffer_unchanged_p) |
5f5c8ee5 GM |
10726 | w->base_line_number = Qnil; |
10727 | ||
10728 | /* Move backward half the height of the window. */ | |
10729 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10730 | it.current_y = it.last_visible_y; | |
ddf6b9a3 | 10731 | move_it_vertically_backward (&it, centering_position); |
5f5c8ee5 GM |
10732 | xassert (IT_CHARPOS (it) >= BEGV); |
10733 | ||
10734 | /* The function move_it_vertically_backward may move over more | |
10735 | than the specified y-distance. If it->w is small, e.g. a | |
10736 | mini-buffer window, we may end up in front of the window's | |
10737 | display area. Start displaying at the start of the line | |
10738 | containing PT in this case. */ | |
10739 | if (it.current_y <= 0) | |
10740 | { | |
10741 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10742 | move_it_vertically (&it, 0); | |
10743 | xassert (IT_CHARPOS (it) <= PT); | |
10744 | it.current_y = 0; | |
0789adb2 RS |
10745 | } |
10746 | ||
5f5c8ee5 | 10747 | it.current_x = it.hpos = 0; |
2311178e | 10748 | |
5f5c8ee5 GM |
10749 | /* Set startp here explicitly in case that helps avoid an infinite loop |
10750 | in case the window-scroll-functions functions get errors. */ | |
10751 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
10752 | ||
10753 | /* Run scroll hooks. */ | |
10754 | startp = run_window_scroll_functions (window, it.current.pos); | |
10755 | ||
10756 | /* Redisplay the window. */ | |
10757 | if (!current_matrix_up_to_date_p | |
10758 | || windows_or_buffers_changed | |
5fb96e96 | 10759 | || cursor_type_changed |
5f5c8ee5 GM |
10760 | /* Don't use try_window_reusing_current_matrix in this case |
10761 | because it can have changed the buffer. */ | |
10762 | || !NILP (Vwindow_scroll_functions) | |
10763 | || !just_this_one_p | |
10764 | || MINI_WINDOW_P (w) | |
10765 | || !try_window_reusing_current_matrix (w)) | |
10766 | try_window (window, startp); | |
10767 | ||
10768 | /* If new fonts have been loaded (due to fontsets), give up. We | |
10769 | have to start a new redisplay since we need to re-adjust glyph | |
10770 | matrices. */ | |
10771 | if (fonts_changed_p) | |
cb617e7c | 10772 | goto need_larger_matrices; |
5f5c8ee5 GM |
10773 | |
10774 | /* If cursor did not appear assume that the middle of the window is | |
10775 | in the first line of the window. Do it again with the next line. | |
10776 | (Imagine a window of height 100, displaying two lines of height | |
10777 | 60. Moving back 50 from it->last_visible_y will end in the first | |
10778 | line.) */ | |
10779 | if (w->cursor.vpos < 0) | |
a2889657 | 10780 | { |
5f5c8ee5 GM |
10781 | if (!NILP (w->window_end_valid) |
10782 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 10783 | { |
5f5c8ee5 GM |
10784 | clear_glyph_matrix (w->desired_matrix); |
10785 | move_it_by_lines (&it, 1, 0); | |
10786 | try_window (window, it.current.pos); | |
a2889657 | 10787 | } |
5f5c8ee5 | 10788 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 10789 | { |
5f5c8ee5 GM |
10790 | clear_glyph_matrix (w->desired_matrix); |
10791 | move_it_by_lines (&it, -1, 0); | |
10792 | try_window (window, it.current.pos); | |
10793 | } | |
10794 | else | |
10795 | { | |
10796 | /* Not much we can do about it. */ | |
a2889657 | 10797 | } |
a2889657 | 10798 | } |
010494d0 | 10799 | |
5f5c8ee5 GM |
10800 | /* Consider the following case: Window starts at BEGV, there is |
10801 | invisible, intangible text at BEGV, so that display starts at | |
10802 | some point START > BEGV. It can happen that we are called with | |
10803 | PT somewhere between BEGV and START. Try to handle that case. */ | |
10804 | if (w->cursor.vpos < 0) | |
835766b6 | 10805 | { |
5f5c8ee5 GM |
10806 | struct glyph_row *row = w->current_matrix->rows; |
10807 | if (row->mode_line_p) | |
10808 | ++row; | |
10809 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 10810 | } |
2311178e | 10811 | |
cb617e7c | 10812 | if (!make_cursor_line_fully_visible (w)) |
ddf6b9a3 RS |
10813 | { |
10814 | /* If centering point failed to make the whole line visible, | |
10815 | put point at the top instead. That has to make the whole line | |
10816 | visible, if it can be done. */ | |
10817 | centering_position = 0; | |
10818 | goto point_at_top; | |
10819 | } | |
b5174a51 | 10820 | |
74d481ac GM |
10821 | done: |
10822 | ||
5f5c8ee5 GM |
10823 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
10824 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
10825 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
10826 | ? Qt : Qnil); | |
a2889657 | 10827 | |
5f5c8ee5 | 10828 | /* Display the mode line, if we must. */ |
e481f960 | 10829 | if ((update_mode_line |
aa6d10fa | 10830 | /* If window not full width, must redo its mode line |
2311178e | 10831 | if (a) the window to its side is being redone and |
5f5c8ee5 GM |
10832 | (b) we do a frame-based redisplay. This is a consequence |
10833 | of how inverted lines are drawn in frame-based redisplay. */ | |
2311178e | 10834 | || (!just_this_one_p |
5f5c8ee5 GM |
10835 | && !FRAME_WINDOW_P (f) |
10836 | && !WINDOW_FULL_WIDTH_P (w)) | |
10837 | /* Line number to display. */ | |
155ef550 | 10838 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 10839 | /* Column number is displayed and different from the one displayed. */ |
155ef550 | 10840 | || (!NILP (w->column_number_displayed) |
2311178e TTN |
10841 | && (XFASTINT (w->column_number_displayed) |
10842 | != (int) current_column ()))) /* iftc */ | |
5f5c8ee5 GM |
10843 | /* This means that the window has a mode line. */ |
10844 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 10845 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 10846 | { |
5f5c8ee5 GM |
10847 | display_mode_lines (w); |
10848 | ||
10849 | /* If mode line height has changed, arrange for a thorough | |
10850 | immediate redisplay using the correct mode line height. */ | |
10851 | if (WINDOW_WANTS_MODELINE_P (w) | |
10852 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 10853 | { |
5f5c8ee5 GM |
10854 | fonts_changed_p = 1; |
10855 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
10856 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 10857 | } |
2311178e | 10858 | |
5f5c8ee5 GM |
10859 | /* If top line height has changed, arrange for a thorough |
10860 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
10861 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10862 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
10863 | { |
10864 | fonts_changed_p = 1; | |
045dee35 GM |
10865 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
10866 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
10867 | } |
10868 | ||
10869 | if (fonts_changed_p) | |
cb617e7c | 10870 | goto need_larger_matrices; |
5ba50c51 | 10871 | } |
5f5c8ee5 GM |
10872 | |
10873 | if (!line_number_displayed | |
10874 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
10875 | { |
10876 | w->base_line_pos = Qnil; | |
10877 | w->base_line_number = Qnil; | |
10878 | } | |
a2889657 | 10879 | |
5f5c8ee5 | 10880 | finish_menu_bars: |
2311178e | 10881 | |
7ce2c095 | 10882 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 10883 | if (update_mode_line |
5f5c8ee5 GM |
10884 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
10885 | { | |
10886 | int redisplay_menu_p = 0; | |
488dd4c4 | 10887 | int redisplay_tool_bar_p = 0; |
5f5c8ee5 GM |
10888 | |
10889 | if (FRAME_WINDOW_P (f)) | |
10890 | { | |
488dd4c4 JD |
10891 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) \ |
10892 | || defined (USE_GTK) | |
5f5c8ee5 | 10893 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 10894 | #else |
5f5c8ee5 | 10895 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 10896 | #endif |
5f5c8ee5 GM |
10897 | } |
10898 | else | |
10899 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
10900 | ||
10901 | if (redisplay_menu_p) | |
10902 | display_menu_bar (w); | |
10903 | ||
10904 | #ifdef HAVE_WINDOW_SYSTEM | |
488dd4c4 JD |
10905 | #ifdef USE_GTK |
10906 | redisplay_tool_bar_p = FRAME_EXTERNAL_TOOL_BAR (f); | |
10907 | #else | |
10908 | redisplay_tool_bar_p = WINDOWP (f->tool_bar_window) | |
10909 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
10910 | || auto_resize_tool_bars_p); | |
177c0ea7 | 10911 | |
488dd4c4 JD |
10912 | #endif |
10913 | ||
10914 | if (redisplay_tool_bar_p) | |
10915 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
10916 | #endif |
10917 | } | |
7ce2c095 | 10918 | |
b60c9653 RS |
10919 | /* We go to this label, with fonts_changed_p nonzero, |
10920 | if it is necessary to try again using larger glyph matrices. | |
10921 | We have to redeem the scroll bar even in this case, | |
10922 | because the loop in redisplay_internal expects that. */ | |
cb617e7c GM |
10923 | need_larger_matrices: |
10924 | ; | |
88f22aff | 10925 | finish_scroll_bars: |
5f5c8ee5 | 10926 | |
88f22aff | 10927 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 10928 | { |
b1d1124b | 10929 | int start, end, whole; |
30c566e4 | 10930 | |
b1d1124b | 10931 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
10932 | At some point, it would be nice to choose between scrollbars |
10933 | which reflect the whole buffer size, with special markers | |
10934 | indicating narrowing, and scrollbars which reflect only the | |
10935 | visible region. | |
10936 | ||
5f5c8ee5 | 10937 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 10938 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 10939 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 10940 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 10941 | { |
8a9311d7 | 10942 | whole = ZV - BEGV; |
4d641a15 | 10943 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
10944 | /* I don't think this is guaranteed to be right. For the |
10945 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 10946 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 10947 | |
2311178e | 10948 | if (end < start) |
5f5c8ee5 | 10949 | end = start; |
2311178e | 10950 | if (whole < (end - start)) |
5f5c8ee5 | 10951 | whole = end - start; |
b1d1124b JB |
10952 | } |
10953 | else | |
10954 | start = end = whole = 0; | |
30c566e4 | 10955 | |
88f22aff | 10956 | /* Indicate what this scroll bar ought to be displaying now. */ |
504454e8 | 10957 | set_vertical_scroll_bar_hook (w, end - start, whole, start); |
30c566e4 | 10958 | |
5f5c8ee5 GM |
10959 | /* Note that we actually used the scroll bar attached to this |
10960 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 10961 | redeem_scroll_bar_hook (w); |
30c566e4 | 10962 | } |
b1d1124b | 10963 | |
5f5c8ee5 GM |
10964 | /* Restore current_buffer and value of point in it. */ |
10965 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 10966 | set_buffer_internal_1 (old); |
5f5c8ee5 | 10967 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
10968 | |
10969 | unbind_to (count, Qnil); | |
a2889657 | 10970 | } |
a2889657 | 10971 | |
5f5c8ee5 GM |
10972 | |
10973 | /* Build the complete desired matrix of WINDOW with a window start | |
10974 | buffer position POS. Value is non-zero if successful. It is zero | |
10975 | if fonts were loaded during redisplay which makes re-adjusting | |
10976 | glyph matrices necessary. */ | |
10977 | ||
10978 | int | |
a2889657 JB |
10979 | try_window (window, pos) |
10980 | Lisp_Object window; | |
5f5c8ee5 GM |
10981 | struct text_pos pos; |
10982 | { | |
10983 | struct window *w = XWINDOW (window); | |
10984 | struct it it; | |
10985 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 10986 | |
5f5c8ee5 GM |
10987 | /* Make POS the new window start. */ |
10988 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 10989 | |
5f5c8ee5 GM |
10990 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
10991 | w->cursor.vpos = -1; | |
a2889657 | 10992 | overlay_arrow_seen = 0; |
642eefc6 | 10993 | |
5f5c8ee5 GM |
10994 | /* Initialize iterator and info to start at POS. */ |
10995 | start_display (&it, w, pos); | |
a2889657 | 10996 | |
5f5c8ee5 GM |
10997 | /* Display all lines of W. */ |
10998 | while (it.current_y < it.last_visible_y) | |
10999 | { | |
11000 | if (display_line (&it)) | |
11001 | last_text_row = it.glyph_row - 1; | |
11002 | if (fonts_changed_p) | |
11003 | return 0; | |
11004 | } | |
a2889657 | 11005 | |
5f5c8ee5 GM |
11006 | /* If bottom moved off end of frame, change mode line percentage. */ |
11007 | if (XFASTINT (w->window_end_pos) <= 0 | |
11008 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
11009 | w->update_mode_line = Qt; |
11010 | ||
5f5c8ee5 GM |
11011 | /* Set window_end_pos to the offset of the last character displayed |
11012 | on the window from the end of current_buffer. Set | |
11013 | window_end_vpos to its row number. */ | |
11014 | if (last_text_row) | |
11015 | { | |
11016 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
11017 | w->window_end_bytepos | |
11018 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11019 | w->window_end_pos |
11020 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11021 | w->window_end_vpos | |
11022 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11023 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
11024 | ->displays_text_p); | |
11025 | } | |
11026 | else | |
11027 | { | |
11028 | w->window_end_bytepos = 0; | |
ac90c44f | 11029 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 | 11030 | } |
2311178e | 11031 | |
a2889657 JB |
11032 | /* But that is not valid info until redisplay finishes. */ |
11033 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 11034 | return 1; |
a2889657 | 11035 | } |
5f5c8ee5 GM |
11036 | |
11037 | ||
a2889657 | 11038 | \f |
5f5c8ee5 GM |
11039 | /************************************************************************ |
11040 | Window redisplay reusing current matrix when buffer has not changed | |
11041 | ************************************************************************/ | |
11042 | ||
11043 | /* Try redisplay of window W showing an unchanged buffer with a | |
11044 | different window start than the last time it was displayed by | |
11045 | reusing its current matrix. Value is non-zero if successful. | |
11046 | W->start is the new window start. */ | |
a2889657 JB |
11047 | |
11048 | static int | |
5f5c8ee5 GM |
11049 | try_window_reusing_current_matrix (w) |
11050 | struct window *w; | |
a2889657 | 11051 | { |
5f5c8ee5 GM |
11052 | struct frame *f = XFRAME (w->frame); |
11053 | struct glyph_row *row, *bottom_row; | |
11054 | struct it it; | |
11055 | struct run run; | |
11056 | struct text_pos start, new_start; | |
11057 | int nrows_scrolled, i; | |
11058 | struct glyph_row *last_text_row; | |
11059 | struct glyph_row *last_reused_text_row; | |
11060 | struct glyph_row *start_row; | |
11061 | int start_vpos, min_y, max_y; | |
75c5350a | 11062 | |
69d1f7c9 | 11063 | #if GLYPH_DEBUG |
76cb5e06 GM |
11064 | if (inhibit_try_window_reusing) |
11065 | return 0; | |
11066 | #endif | |
11067 | ||
d18354b6 GM |
11068 | if (/* This function doesn't handle terminal frames. */ |
11069 | !FRAME_WINDOW_P (f) | |
11070 | /* Don't try to reuse the display if windows have been split | |
11071 | or such. */ | |
5fb96e96 RS |
11072 | || windows_or_buffers_changed |
11073 | || cursor_type_changed) | |
5f5c8ee5 | 11074 | return 0; |
a2889657 | 11075 | |
5f5c8ee5 GM |
11076 | /* Can't do this if region may have changed. */ |
11077 | if ((!NILP (Vtransient_mark_mode) | |
11078 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
11079 | || !NILP (w->region_showing) |
11080 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 11081 | return 0; |
a2889657 | 11082 | |
5f5c8ee5 | 11083 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
11084 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
11085 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
11086 | return 0; |
11087 | ||
11088 | /* Give up if old or new display is scrolled vertically. We could | |
11089 | make this function handle this, but right now it doesn't. */ | |
11090 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11091 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
11092 | return 0; | |
11093 | ||
11094 | /* The variable new_start now holds the new window start. The old | |
11095 | start `start' can be determined from the current matrix. */ | |
11096 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
11097 | start = start_row->start.pos; | |
11098 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 11099 | |
5f5c8ee5 GM |
11100 | /* Clear the desired matrix for the display below. */ |
11101 | clear_glyph_matrix (w->desired_matrix); | |
2311178e | 11102 | |
5f5c8ee5 GM |
11103 | if (CHARPOS (new_start) <= CHARPOS (start)) |
11104 | { | |
11105 | int first_row_y; | |
2311178e | 11106 | |
607ec83c GM |
11107 | /* Don't use this method if the display starts with an ellipsis |
11108 | displayed for invisible text. It's not easy to handle that case | |
11109 | below, and it's certainly not worth the effort since this is | |
11110 | not a frequent case. */ | |
11111 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
11112 | return 0; | |
11113 | ||
5f5c8ee5 | 11114 | IF_DEBUG (debug_method_add (w, "twu1")); |
2311178e | 11115 | |
5f5c8ee5 GM |
11116 | /* Display up to a row that can be reused. The variable |
11117 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
11118 | text. Note that it.vpos == 0 if or if not there is a |
11119 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
11120 | start_display (&it, w, new_start); |
11121 | first_row_y = it.current_y; | |
11122 | w->cursor.vpos = -1; | |
11123 | last_text_row = last_reused_text_row = NULL; | |
2311178e | 11124 | |
5f5c8ee5 GM |
11125 | while (it.current_y < it.last_visible_y |
11126 | && IT_CHARPOS (it) < CHARPOS (start) | |
11127 | && !fonts_changed_p) | |
11128 | if (display_line (&it)) | |
11129 | last_text_row = it.glyph_row - 1; | |
11130 | ||
11131 | /* A value of current_y < last_visible_y means that we stopped | |
11132 | at the previous window start, which in turn means that we | |
11133 | have at least one reusable row. */ | |
11134 | if (it.current_y < it.last_visible_y) | |
a2889657 | 11135 | { |
b48f74cb | 11136 | /* IT.vpos always starts from 0; it counts text lines. */ |
5f5c8ee5 | 11137 | nrows_scrolled = it.vpos; |
2311178e | 11138 | |
5f5c8ee5 GM |
11139 | /* Find PT if not already found in the lines displayed. */ |
11140 | if (w->cursor.vpos < 0) | |
a2889657 | 11141 | { |
5f5c8ee5 | 11142 | int dy = it.current_y - first_row_y; |
2311178e | 11143 | |
5f5c8ee5 | 11144 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); |
0df56f4d GM |
11145 | row = row_containing_pos (w, PT, row, NULL, dy); |
11146 | if (row) | |
11147 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
11148 | dy, nrows_scrolled); | |
11149 | else | |
5f5c8ee5 GM |
11150 | { |
11151 | clear_glyph_matrix (w->desired_matrix); | |
11152 | return 0; | |
11153 | } | |
a2889657 | 11154 | } |
5f5c8ee5 GM |
11155 | |
11156 | /* Scroll the display. Do it before the current matrix is | |
11157 | changed. The problem here is that update has not yet | |
11158 | run, i.e. part of the current matrix is not up to date. | |
11159 | scroll_run_hook will clear the cursor, and use the | |
11160 | current matrix to get the height of the row the cursor is | |
11161 | in. */ | |
11162 | run.current_y = first_row_y; | |
11163 | run.desired_y = it.current_y; | |
11164 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
11165 | |
11166 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 11167 | { |
5f5c8ee5 GM |
11168 | update_begin (f); |
11169 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11170 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11171 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11172 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 11173 | update_end (f); |
a2889657 | 11174 | } |
5f5c8ee5 GM |
11175 | |
11176 | /* Shift current matrix down by nrows_scrolled lines. */ | |
11177 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
11178 | rotate_matrix (w->current_matrix, | |
11179 | start_vpos, | |
11180 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
11181 | nrows_scrolled); | |
2311178e | 11182 | |
9c8b8382 | 11183 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 11184 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 11185 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 11186 | |
5f5c8ee5 | 11187 | /* Re-compute Y positions. */ |
045dee35 | 11188 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11189 | max_y = it.last_visible_y; |
b48f74cb GM |
11190 | for (row = start_row + nrows_scrolled; |
11191 | row < bottom_row; | |
11192 | ++row) | |
d2f84654 | 11193 | { |
5f5c8ee5 | 11194 | row->y = it.current_y; |
75c5350a | 11195 | row->visible_height = row->height; |
5f5c8ee5 GM |
11196 | |
11197 | if (row->y < min_y) | |
75c5350a GM |
11198 | row->visible_height -= min_y - row->y; |
11199 | if (row->y + row->height > max_y) | |
11200 | row->visible_height -= row->y + row->height - max_y; | |
2311178e | 11201 | |
5f5c8ee5 | 11202 | it.current_y += row->height; |
5f5c8ee5 GM |
11203 | |
11204 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11205 | last_reused_text_row = row; | |
11206 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
11207 | break; | |
d2f84654 | 11208 | } |
2311178e | 11209 | |
9c8b8382 GM |
11210 | /* Disable lines in the current matrix which are now |
11211 | below the window. */ | |
bafb434c | 11212 | for (++row; row < bottom_row; ++row) |
9c8b8382 | 11213 | row->enabled_p = 0; |
a2889657 | 11214 | } |
5f5c8ee5 GM |
11215 | |
11216 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
11217 | reused row from the current matrix containing text, if any. | |
11218 | The value of last_text_row is the last displayed line | |
11219 | containing text. */ | |
11220 | if (last_reused_text_row) | |
a2889657 | 11221 | { |
5f5c8ee5 GM |
11222 | w->window_end_bytepos |
11223 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
11224 | w->window_end_pos |
11225 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
11226 | w->window_end_vpos | |
11227 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
11228 | w->current_matrix)); | |
a2889657 | 11229 | } |
5f5c8ee5 GM |
11230 | else if (last_text_row) |
11231 | { | |
11232 | w->window_end_bytepos | |
11233 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11234 | w->window_end_pos |
11235 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11236 | w->window_end_vpos | |
11237 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11238 | } |
11239 | else | |
11240 | { | |
11241 | /* This window must be completely empty. */ | |
11242 | w->window_end_bytepos = 0; | |
ac90c44f | 11243 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
11244 | } |
11245 | w->window_end_valid = Qnil; | |
a2889657 | 11246 | |
5f5c8ee5 GM |
11247 | /* Update hint: don't try scrolling again in update_window. */ |
11248 | w->desired_matrix->no_scrolling_p = 1; | |
2311178e | 11249 | |
5f5c8ee5 GM |
11250 | #if GLYPH_DEBUG |
11251 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
11252 | #endif | |
11253 | return 1; | |
a2889657 | 11254 | } |
5f5c8ee5 GM |
11255 | else if (CHARPOS (new_start) > CHARPOS (start)) |
11256 | { | |
11257 | struct glyph_row *pt_row, *row; | |
11258 | struct glyph_row *first_reusable_row; | |
11259 | struct glyph_row *first_row_to_display; | |
11260 | int dy; | |
11261 | int yb = window_text_bottom_y (w); | |
11262 | ||
5f5c8ee5 GM |
11263 | /* Find the row starting at new_start, if there is one. Don't |
11264 | reuse a partially visible line at the end. */ | |
b48f74cb | 11265 | first_reusable_row = start_row; |
5f5c8ee5 GM |
11266 | while (first_reusable_row->enabled_p |
11267 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
11268 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
11269 | < CHARPOS (new_start))) | |
11270 | ++first_reusable_row; | |
11271 | ||
11272 | /* Give up if there is no row to reuse. */ | |
11273 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
11274 | || !first_reusable_row->enabled_p |
11275 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
11276 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
11277 | return 0; |
11278 | ||
5f5c8ee5 GM |
11279 | /* We can reuse fully visible rows beginning with |
11280 | first_reusable_row to the end of the window. Set | |
11281 | first_row_to_display to the first row that cannot be reused. | |
11282 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 11283 | pt_row = NULL; |
ac90c44f GM |
11284 | for (first_row_to_display = first_reusable_row; |
11285 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
11286 | ++first_row_to_display) | |
5f5c8ee5 | 11287 | { |
4bde0ebb GM |
11288 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
11289 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 11290 | pt_row = first_row_to_display; |
5f5c8ee5 | 11291 | } |
a2889657 | 11292 | |
5f5c8ee5 GM |
11293 | /* Start displaying at the start of first_row_to_display. */ |
11294 | xassert (first_row_to_display->y < yb); | |
11295 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 11296 | |
b48f74cb GM |
11297 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
11298 | - start_vpos); | |
5f5c8ee5 GM |
11299 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
11300 | - nrows_scrolled); | |
b48f74cb GM |
11301 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
11302 | + WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); | |
5f5c8ee5 GM |
11303 | |
11304 | /* Display lines beginning with first_row_to_display in the | |
11305 | desired matrix. Set last_text_row to the last row displayed | |
11306 | that displays text. */ | |
11307 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
11308 | if (pt_row == NULL) | |
11309 | w->cursor.vpos = -1; | |
11310 | last_text_row = NULL; | |
11311 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
11312 | if (display_line (&it)) | |
11313 | last_text_row = it.glyph_row - 1; | |
11314 | ||
11315 | /* Give up If point isn't in a row displayed or reused. */ | |
11316 | if (w->cursor.vpos < 0) | |
11317 | { | |
11318 | clear_glyph_matrix (w->desired_matrix); | |
11319 | return 0; | |
11320 | } | |
12adba34 | 11321 | |
5f5c8ee5 GM |
11322 | /* If point is in a reused row, adjust y and vpos of the cursor |
11323 | position. */ | |
11324 | if (pt_row) | |
11325 | { | |
11326 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
11327 | w->current_matrix); | |
11328 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
11329 | } |
11330 | ||
5f5c8ee5 GM |
11331 | /* Scroll the display. */ |
11332 | run.current_y = first_reusable_row->y; | |
045dee35 | 11333 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11334 | run.height = it.last_visible_y - run.current_y; |
4da61803 | 11335 | dy = run.current_y - run.desired_y; |
2311178e | 11336 | |
5f5c8ee5 GM |
11337 | if (run.height) |
11338 | { | |
11339 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
11340 | update_begin (f); | |
11341 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11342 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11343 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11344 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11345 | update_end (f); |
11346 | } | |
a2889657 | 11347 | |
5f5c8ee5 GM |
11348 | /* Adjust Y positions of reused rows. */ |
11349 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
045dee35 | 11350 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11351 | max_y = it.last_visible_y; |
b48f74cb | 11352 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
11353 | { |
11354 | row->y -= dy; | |
75c5350a | 11355 | row->visible_height = row->height; |
5f5c8ee5 | 11356 | if (row->y < min_y) |
75c5350a GM |
11357 | row->visible_height -= min_y - row->y; |
11358 | if (row->y + row->height > max_y) | |
11359 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 11360 | } |
a2889657 | 11361 | |
5f5c8ee5 GM |
11362 | /* Scroll the current matrix. */ |
11363 | xassert (nrows_scrolled > 0); | |
11364 | rotate_matrix (w->current_matrix, | |
11365 | start_vpos, | |
11366 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
11367 | -nrows_scrolled); | |
11368 | ||
ac90c44f GM |
11369 | /* Disable rows not reused. */ |
11370 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
11371 | row->enabled_p = 0; | |
11372 | ||
5f5c8ee5 GM |
11373 | /* Adjust window end. A null value of last_text_row means that |
11374 | the window end is in reused rows which in turn means that | |
11375 | only its vpos can have changed. */ | |
11376 | if (last_text_row) | |
11377 | { | |
11378 | w->window_end_bytepos | |
11379 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11380 | w->window_end_pos |
11381 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11382 | w->window_end_vpos | |
11383 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11384 | } |
11385 | else | |
a2889657 | 11386 | { |
ac90c44f GM |
11387 | w->window_end_vpos |
11388 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 11389 | } |
2311178e | 11390 | |
5f5c8ee5 GM |
11391 | w->window_end_valid = Qnil; |
11392 | w->desired_matrix->no_scrolling_p = 1; | |
11393 | ||
11394 | #if GLYPH_DEBUG | |
11395 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
11396 | #endif | |
11397 | return 1; | |
a2889657 | 11398 | } |
2311178e | 11399 | |
5f5c8ee5 GM |
11400 | return 0; |
11401 | } | |
a2889657 | 11402 | |
a2889657 | 11403 | |
5f5c8ee5 GM |
11404 | \f |
11405 | /************************************************************************ | |
11406 | Window redisplay reusing current matrix when buffer has changed | |
11407 | ************************************************************************/ | |
11408 | ||
1ec185cb GM |
11409 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
11410 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
11411 | int *, int *)); |
11412 | static struct glyph_row * | |
11413 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
11414 | struct glyph_row *)); | |
11415 | ||
11416 | ||
11417 | /* Return the last row in MATRIX displaying text. If row START is | |
11418 | non-null, start searching with that row. IT gives the dimensions | |
11419 | of the display. Value is null if matrix is empty; otherwise it is | |
11420 | a pointer to the row found. */ | |
11421 | ||
11422 | static struct glyph_row * | |
11423 | find_last_row_displaying_text (matrix, it, start) | |
11424 | struct glyph_matrix *matrix; | |
11425 | struct it *it; | |
11426 | struct glyph_row *start; | |
11427 | { | |
11428 | struct glyph_row *row, *row_found; | |
11429 | ||
11430 | /* Set row_found to the last row in IT->w's current matrix | |
11431 | displaying text. The loop looks funny but think of partially | |
11432 | visible lines. */ | |
11433 | row_found = NULL; | |
11434 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
11435 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11436 | { | |
11437 | xassert (row->enabled_p); | |
11438 | row_found = row; | |
11439 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
11440 | break; | |
11441 | ++row; | |
a2889657 | 11442 | } |
2311178e | 11443 | |
5f5c8ee5 GM |
11444 | return row_found; |
11445 | } | |
11446 | ||
a2889657 | 11447 | |
5f5c8ee5 | 11448 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
11449 | by changes at the start of current_buffer that occurred since W's |
11450 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 11451 | |
d43fbe9d GM |
11452 | BEG_UNCHANGED us the number of characters unchanged at the start of |
11453 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
11454 | first changed character in current_buffer. Characters at positions < | |
11455 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
11456 | when the current matrix was built. */ | |
5f5c8ee5 GM |
11457 | |
11458 | static struct glyph_row * | |
1ec185cb | 11459 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
11460 | struct window *w; |
11461 | { | |
9142dd5b | 11462 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
11463 | struct glyph_row *row; |
11464 | struct glyph_row *row_found = NULL; | |
11465 | int yb = window_text_bottom_y (w); | |
11466 | ||
11467 | /* Find the last row displaying unchanged text. */ | |
11468 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11469 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
11470 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 11471 | { |
5f5c8ee5 GM |
11472 | if (/* If row ends before first_changed_pos, it is unchanged, |
11473 | except in some case. */ | |
11474 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
11475 | /* When row ends in ZV and we write at ZV it is not | |
11476 | unchanged. */ | |
11477 | && !row->ends_at_zv_p | |
11478 | /* When first_changed_pos is the end of a continued line, | |
11479 | row is not unchanged because it may be no longer | |
11480 | continued. */ | |
11481 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
11482 | && row->continued_p)) | |
11483 | row_found = row; | |
11484 | ||
11485 | /* Stop if last visible row. */ | |
11486 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
11487 | break; | |
2311178e | 11488 | |
5f5c8ee5 | 11489 | ++row; |
a2889657 JB |
11490 | } |
11491 | ||
5f5c8ee5 | 11492 | return row_found; |
a2889657 | 11493 | } |
5f5c8ee5 GM |
11494 | |
11495 | ||
11496 | /* Find the first glyph row in the current matrix of W that is not | |
2311178e | 11497 | affected by changes at the end of current_buffer since the |
d43fbe9d GM |
11498 | time W's current matrix was built. |
11499 | ||
11500 | Return in *DELTA the number of chars by which buffer positions in | |
11501 | unchanged text at the end of current_buffer must be adjusted. | |
2311178e | 11502 | |
d43fbe9d GM |
11503 | Return in *DELTA_BYTES the corresponding number of bytes. |
11504 | ||
11505 | Value is null if no such row exists, i.e. all rows are affected by | |
11506 | changes. */ | |
2311178e | 11507 | |
5f5c8ee5 | 11508 | static struct glyph_row * |
1ec185cb | 11509 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
11510 | struct window *w; |
11511 | int *delta, *delta_bytes; | |
a2889657 | 11512 | { |
5f5c8ee5 GM |
11513 | struct glyph_row *row; |
11514 | struct glyph_row *row_found = NULL; | |
c581d710 | 11515 | |
5f5c8ee5 | 11516 | *delta = *delta_bytes = 0; |
b2a76982 | 11517 | |
1ec185cb GM |
11518 | /* Display must not have been paused, otherwise the current matrix |
11519 | is not up to date. */ | |
11520 | if (NILP (w->window_end_valid)) | |
11521 | abort (); | |
2311178e | 11522 | |
1ec185cb | 11523 | /* A value of window_end_pos >= END_UNCHANGED means that the window |
5f5c8ee5 GM |
11524 | end is in the range of changed text. If so, there is no |
11525 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 11526 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
11527 | return NULL; |
11528 | ||
11529 | /* Set row to the last row in W's current matrix displaying text. */ | |
11530 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
2311178e TTN |
11531 | |
11532 | /* If matrix is entirely empty, no unchanged row exists. */ | |
5f5c8ee5 GM |
11533 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11534 | { | |
11535 | /* The value of row is the last glyph row in the matrix having a | |
11536 | meaningful buffer position in it. The end position of row | |
11537 | corresponds to window_end_pos. This allows us to translate | |
11538 | buffer positions in the current matrix to current buffer | |
11539 | positions for characters not in changed text. */ | |
11540 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11541 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11542 | int last_unchanged_pos, last_unchanged_pos_old; | |
11543 | struct glyph_row *first_text_row | |
11544 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11545 | ||
11546 | *delta = Z - Z_old; | |
11547 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
11548 | ||
11549 | /* Set last_unchanged_pos to the buffer position of the last | |
11550 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
11551 | index + 1 of the last character in current_buffer, i.e. by |
11552 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
11553 | unchanged character, and we have to add BEG to get its buffer |
11554 | position. */ | |
9142dd5b | 11555 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 | 11556 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
2311178e | 11557 | |
5f5c8ee5 GM |
11558 | /* Search backward from ROW for a row displaying a line that |
11559 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 11560 | for (; row > first_text_row; --row) |
5f5c8ee5 | 11561 | { |
1ec185cb GM |
11562 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11563 | abort (); | |
2311178e | 11564 | |
5f5c8ee5 GM |
11565 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) |
11566 | row_found = row; | |
5f5c8ee5 GM |
11567 | } |
11568 | } | |
11569 | ||
1ec185cb GM |
11570 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
11571 | abort (); | |
2311178e | 11572 | |
5f5c8ee5 | 11573 | return row_found; |
c581d710 RS |
11574 | } |
11575 | ||
c581d710 | 11576 | |
5f5c8ee5 GM |
11577 | /* Make sure that glyph rows in the current matrix of window W |
11578 | reference the same glyph memory as corresponding rows in the | |
11579 | frame's frame matrix. This function is called after scrolling W's | |
11580 | current matrix on a terminal frame in try_window_id and | |
11581 | try_window_reusing_current_matrix. */ | |
11582 | ||
11583 | static void | |
11584 | sync_frame_with_window_matrix_rows (w) | |
11585 | struct window *w; | |
c581d710 | 11586 | { |
5f5c8ee5 GM |
11587 | struct frame *f = XFRAME (w->frame); |
11588 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
11589 | ||
11590 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
11591 | must have a frame matrix. */ | |
11592 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
11593 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
11594 | xassert (!FRAME_WINDOW_P (f)); | |
11595 | ||
11596 | /* If W is a full-width window, glyph pointers in W's current matrix | |
11597 | have, by definition, to be the same as glyph pointers in the | |
7d4cc828 GM |
11598 | corresponding frame matrix. Note that frame matrices have no |
11599 | marginal areas (see build_frame_matrix). */ | |
5f5c8ee5 GM |
11600 | window_row = w->current_matrix->rows; |
11601 | window_row_end = window_row + w->current_matrix->nrows; | |
11602 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
11603 | while (window_row < window_row_end) | |
659a218f | 11604 | { |
7d4cc828 GM |
11605 | struct glyph *start = window_row->glyphs[LEFT_MARGIN_AREA]; |
11606 | struct glyph *end = window_row->glyphs[LAST_AREA]; | |
11607 | ||
11608 | frame_row->glyphs[LEFT_MARGIN_AREA] = start; | |
11609 | frame_row->glyphs[TEXT_AREA] = start; | |
11610 | frame_row->glyphs[RIGHT_MARGIN_AREA] = end; | |
11611 | frame_row->glyphs[LAST_AREA] = end; | |
f002db93 GM |
11612 | |
11613 | /* Disable frame rows whose corresponding window rows have | |
11614 | been disabled in try_window_id. */ | |
11615 | if (!window_row->enabled_p) | |
11616 | frame_row->enabled_p = 0; | |
2311178e | 11617 | |
5f5c8ee5 | 11618 | ++window_row, ++frame_row; |
659a218f | 11619 | } |
a2889657 | 11620 | } |
5f5c8ee5 GM |
11621 | |
11622 | ||
e037b9ec GM |
11623 | /* Find the glyph row in window W containing CHARPOS. Consider all |
11624 | rows between START and END (not inclusive). END null means search | |
11625 | all rows to the end of the display area of W. Value is the row | |
11626 | containing CHARPOS or null. */ | |
11627 | ||
0bef35bc | 11628 | struct glyph_row * |
0df56f4d | 11629 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
11630 | struct window *w; |
11631 | int charpos; | |
11632 | struct glyph_row *start, *end; | |
0df56f4d | 11633 | int dy; |
e037b9ec GM |
11634 | { |
11635 | struct glyph_row *row = start; | |
11636 | int last_y; | |
11637 | ||
11638 | /* If we happen to start on a header-line, skip that. */ | |
11639 | if (row->mode_line_p) | |
11640 | ++row; | |
2311178e | 11641 | |
e037b9ec GM |
11642 | if ((end && row >= end) || !row->enabled_p) |
11643 | return NULL; | |
2311178e | 11644 | |
0df56f4d | 11645 | last_y = window_text_bottom_y (w) - dy; |
2311178e | 11646 | |
5cce13dd RS |
11647 | while (1) |
11648 | { | |
11649 | /* Give up if we have gone too far. */ | |
11650 | if (end && row >= end) | |
11651 | return NULL; | |
40a301b3 RS |
11652 | /* This formerly returned if they were equal. |
11653 | I think that both quantities are of a "last plus one" type; | |
11654 | if so, when they are equal, the row is within the screen. -- rms. */ | |
11655 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y) | |
5cce13dd RS |
11656 | return NULL; |
11657 | ||
11658 | /* If it is in this row, return this row. */ | |
11659 | if (! (MATRIX_ROW_END_CHARPOS (row) < charpos | |
e037b9ec | 11660 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
11661 | /* The end position of a row equals the start |
11662 | position of the next row. If CHARPOS is there, we | |
11663 | would rather display it in the next line, except | |
11664 | when this line ends in ZV. */ | |
11665 | && !row->ends_at_zv_p | |
5cce13dd RS |
11666 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) |
11667 | && charpos >= MATRIX_ROW_START_CHARPOS (row)) | |
11668 | return row; | |
11669 | ++row; | |
11670 | } | |
e037b9ec GM |
11671 | } |
11672 | ||
11673 | ||
5f5c8ee5 GM |
11674 | /* Try to redisplay window W by reusing its existing display. W's |
11675 | current matrix must be up to date when this function is called, | |
11676 | i.e. window_end_valid must not be nil. | |
11677 | ||
11678 | Value is | |
11679 | ||
11680 | 1 if display has been updated | |
11681 | 0 if otherwise unsuccessful | |
11682 | -1 if redisplay with same window start is known not to succeed | |
11683 | ||
11684 | The following steps are performed: | |
11685 | ||
11686 | 1. Find the last row in the current matrix of W that is not | |
11687 | affected by changes at the start of current_buffer. If no such row | |
11688 | is found, give up. | |
11689 | ||
11690 | 2. Find the first row in W's current matrix that is not affected by | |
11691 | changes at the end of current_buffer. Maybe there is no such row. | |
11692 | ||
11693 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
11694 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
11695 | the window. | |
11696 | ||
11697 | 4. If cursor is not known to appear on the window, give up. | |
11698 | ||
11699 | 5. If display stopped at the row found in step 2, scroll the | |
11700 | display and current matrix as needed. | |
11701 | ||
11702 | 6. Maybe display some lines at the end of W, if we must. This can | |
11703 | happen under various circumstances, like a partially visible line | |
11704 | becoming fully visible, or because newly displayed lines are displayed | |
11705 | in smaller font sizes. | |
11706 | ||
11707 | 7. Update W's window end information. */ | |
11708 | ||
12adba34 | 11709 | static int |
5f5c8ee5 | 11710 | try_window_id (w) |
12adba34 | 11711 | struct window *w; |
12adba34 | 11712 | { |
5f5c8ee5 GM |
11713 | struct frame *f = XFRAME (w->frame); |
11714 | struct glyph_matrix *current_matrix = w->current_matrix; | |
11715 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
11716 | struct glyph_row *last_unchanged_at_beg_row; | |
11717 | struct glyph_row *first_unchanged_at_end_row; | |
11718 | struct glyph_row *row; | |
11719 | struct glyph_row *bottom_row; | |
11720 | int bottom_vpos; | |
11721 | struct it it; | |
11722 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
11723 | struct text_pos start_pos; | |
11724 | struct run run; | |
11725 | int first_unchanged_at_end_vpos = 0; | |
11726 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
11727 | struct text_pos start; | |
27d16f05 | 11728 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 11729 | |
69d1f7c9 | 11730 | #if GLYPH_DEBUG |
76cb5e06 GM |
11731 | if (inhibit_try_window_id) |
11732 | return 0; | |
11733 | #endif | |
11734 | ||
27d16f05 GM |
11735 | /* This is handy for debugging. */ |
11736 | #if 0 | |
11737 | #define GIVE_UP(X) \ | |
11738 | do { \ | |
11739 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
11740 | return 0; \ | |
11741 | } while (0) | |
11742 | #else | |
62397849 | 11743 | #define GIVE_UP(X) return 0 |
27d16f05 | 11744 | #endif |
2311178e | 11745 | |
5f5c8ee5 GM |
11746 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
11747 | ||
27d16f05 GM |
11748 | /* Don't use this for mini-windows because these can show |
11749 | messages and mini-buffers, and we don't handle that here. */ | |
11750 | if (MINI_WINDOW_P (w)) | |
11751 | GIVE_UP (1); | |
2311178e | 11752 | |
27d16f05 | 11753 | /* This flag is used to prevent redisplay optimizations. */ |
5fb96e96 | 11754 | if (windows_or_buffers_changed || cursor_type_changed) |
27d16f05 | 11755 | GIVE_UP (2); |
2311178e | 11756 | |
c62c1bb5 RS |
11757 | /* Verify that narrowing has not changed. |
11758 | Also verify that we were not told to prevent redisplay optimizations. | |
11759 | It would be nice to further | |
27d16f05 | 11760 | reduce the number of cases where this prevents try_window_id. */ |
c62c1bb5 RS |
11761 | if (current_buffer->clip_changed |
11762 | || current_buffer->prevent_redisplay_optimizations_p) | |
27d16f05 GM |
11763 | GIVE_UP (3); |
11764 | ||
11765 | /* Window must either use window-based redisplay or be full width. */ | |
11766 | if (!FRAME_WINDOW_P (f) | |
11767 | && (!line_ins_del_ok | |
11768 | || !WINDOW_FULL_WIDTH_P (w))) | |
11769 | GIVE_UP (4); | |
5f5c8ee5 | 11770 | |
f5376658 | 11771 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
11772 | if (PT < CHARPOS (start)) |
11773 | GIVE_UP (5); | |
11774 | ||
11775 | /* Another way to prevent redisplay optimizations. */ | |
11776 | if (XFASTINT (w->last_modified) == 0) | |
11777 | GIVE_UP (6); | |
2311178e | 11778 | |
f5376658 | 11779 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
11780 | if (XFASTINT (w->hscroll) != 0) |
11781 | GIVE_UP (7); | |
2311178e | 11782 | |
f5376658 | 11783 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
11784 | if (NILP (w->window_end_valid)) |
11785 | GIVE_UP (8); | |
2311178e | 11786 | |
27d16f05 GM |
11787 | /* Can't use this if highlighting a region because a cursor movement |
11788 | will do more than just set the cursor. */ | |
11789 | if (!NILP (Vtransient_mark_mode) | |
11790 | && !NILP (current_buffer->mark_active)) | |
11791 | GIVE_UP (9); | |
11792 | ||
11793 | /* Likewise if highlighting trailing whitespace. */ | |
11794 | if (!NILP (Vshow_trailing_whitespace)) | |
11795 | GIVE_UP (11); | |
2311178e | 11796 | |
27d16f05 GM |
11797 | /* Likewise if showing a region. */ |
11798 | if (!NILP (w->region_showing)) | |
11799 | GIVE_UP (10); | |
2311178e | 11800 | |
27d16f05 GM |
11801 | /* Can use this if overlay arrow position and or string have changed. */ |
11802 | if (!EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) | |
11803 | || !EQ (last_arrow_string, Voverlay_arrow_string)) | |
11804 | GIVE_UP (12); | |
11805 | ||
2311178e | 11806 | |
5f5c8ee5 GM |
11807 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
11808 | only if buffer has really changed. The reason is that the gap is | |
11809 | initially at Z for freshly visited files. The code below would | |
11810 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
11811 | if (MODIFF > SAVE_MODIFF |
11812 | /* This seems to happen sometimes after saving a buffer. */ | |
11813 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 11814 | { |
9142dd5b GM |
11815 | if (GPT - BEG < BEG_UNCHANGED) |
11816 | BEG_UNCHANGED = GPT - BEG; | |
11817 | if (Z - GPT < END_UNCHANGED) | |
11818 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 11819 | } |
bf9249e3 | 11820 | |
27d16f05 GM |
11821 | /* The position of the first and last character that has been changed. */ |
11822 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
11823 | last_changed_charpos = Z - END_UNCHANGED; | |
11824 | ||
5f5c8ee5 GM |
11825 | /* If window starts after a line end, and the last change is in |
11826 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
11827 | This case happens with stealth-fontification. Note that although |
11828 | the display is unchanged, glyph positions in the matrix have to | |
11829 | be adjusted, of course. */ | |
5f5c8ee5 | 11830 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 11831 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 11832 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 11833 | && CHARPOS (start) == BEGV) |
e60f4527 | 11834 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
11835 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
11836 | { | |
11837 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
11838 | struct glyph_row *r0; | |
11839 | ||
11840 | /* Compute how many chars/bytes have been added to or removed | |
11841 | from the buffer. */ | |
11842 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11843 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11844 | delta = Z - Z_old; | |
11845 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
2311178e | 11846 | |
27d16f05 GM |
11847 | /* Give up if PT is not in the window. Note that it already has |
11848 | been checked at the start of try_window_id that PT is not in | |
11849 | front of the window start. */ | |
11850 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
11851 | GIVE_UP (13); | |
11852 | ||
11853 | /* If window start is unchanged, we can reuse the whole matrix | |
11854 | as is, after adjusting glyph positions. No need to compute | |
11855 | the window end again, since its offset from Z hasn't changed. */ | |
11856 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11857 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
11858 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes) | |
11859 | { | |
11860 | /* Adjust positions in the glyph matrix. */ | |
11861 | if (delta || delta_bytes) | |
11862 | { | |
11863 | struct glyph_row *r1 | |
11864 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11865 | increment_matrix_positions (w->current_matrix, | |
11866 | MATRIX_ROW_VPOS (r0, current_matrix), | |
11867 | MATRIX_ROW_VPOS (r1, current_matrix), | |
11868 | delta, delta_bytes); | |
11869 | } | |
2311178e | 11870 | |
27d16f05 | 11871 | /* Set the cursor. */ |
0df56f4d | 11872 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
11873 | if (row) |
11874 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
11875 | else |
11876 | abort (); | |
27d16f05 GM |
11877 | return 1; |
11878 | } | |
5f5c8ee5 GM |
11879 | } |
11880 | ||
27d16f05 | 11881 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 11882 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
11883 | be taken if ZV is visible in the window, and text has been added |
11884 | there that is visible in the window. */ | |
11885 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
11886 | /* ZV is not visible in the window, or there are no |
11887 | changes at ZV, actually. */ | |
11888 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
11889 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 11890 | { |
27d16f05 | 11891 | struct glyph_row *r0; |
ef121659 | 11892 | |
27d16f05 GM |
11893 | /* Give up if PT is not in the window. Note that it already has |
11894 | been checked at the start of try_window_id that PT is not in | |
11895 | front of the window start. */ | |
11896 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
11897 | GIVE_UP (14); | |
11898 | ||
11899 | /* If window start is unchanged, we can reuse the whole matrix | |
11900 | as is, without changing glyph positions since no text has | |
11901 | been added/removed in front of the window end. */ | |
11902 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11903 | if (TEXT_POS_EQUAL_P (start, r0->start.pos)) | |
11904 | { | |
11905 | /* We have to compute the window end anew since text | |
11906 | can have been added/removed after it. */ | |
11907 | w->window_end_pos | |
11908 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
11909 | w->window_end_bytepos | |
11910 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
11911 | ||
11912 | /* Set the cursor. */ | |
0df56f4d | 11913 | row = row_containing_pos (w, PT, r0, NULL, 0); |
59adf8e8 KS |
11914 | if (row) |
11915 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); | |
40a301b3 RS |
11916 | else |
11917 | abort (); | |
27d16f05 GM |
11918 | return 2; |
11919 | } | |
5f5c8ee5 GM |
11920 | } |
11921 | ||
2b9c25e0 | 11922 | /* Give up if window start is in the changed area. |
2311178e | 11923 | |
2b9c25e0 GM |
11924 | The condition used to read |
11925 | ||
11926 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
11927 | ||
11928 | but why that was tested escapes me at the moment. */ | |
11929 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
11930 | && CHARPOS (start) <= last_changed_charpos) |
11931 | GIVE_UP (15); | |
2311178e | 11932 | |
f5376658 RS |
11933 | /* Check that window start agrees with the start of the first glyph |
11934 | row in its current matrix. Check this after we know the window | |
11935 | start is not in changed text, otherwise positions would not be | |
11936 | comparable. */ | |
27d16f05 | 11937 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 11938 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 11939 | GIVE_UP (16); |
5f5c8ee5 | 11940 | |
23e8bd86 GM |
11941 | /* Give up if the window ends in strings. Overlay strings |
11942 | at the end are difficult to handle, so don't try. */ | |
11943 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
11944 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
11945 | GIVE_UP (20); | |
11946 | ||
5f5c8ee5 GM |
11947 | /* Compute the position at which we have to start displaying new |
11948 | lines. Some of the lines at the top of the window might be | |
11949 | reusable because they are not displaying changed text. Find the | |
11950 | last row in W's current matrix not affected by changes at the | |
11951 | start of current_buffer. Value is null if changes start in the | |
11952 | first line of window. */ | |
1ec185cb | 11953 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
11954 | if (last_unchanged_at_beg_row) |
11955 | { | |
67f1cf4c GM |
11956 | /* Avoid starting to display in the moddle of a character, a TAB |
11957 | for instance. This is easier than to set up the iterator | |
11958 | exactly, and it's not a frequent case, so the additional | |
11959 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
11960 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
11961 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
11962 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
11963 | --last_unchanged_at_beg_row; | |
11964 | ||
11965 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 11966 | GIVE_UP (17); |
47d57b22 GM |
11967 | |
11968 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
11969 | GIVE_UP (18); | |
5f5c8ee5 | 11970 | start_pos = it.current.pos; |
2311178e | 11971 | |
5f5c8ee5 GM |
11972 | /* Start displaying new lines in the desired matrix at the same |
11973 | vpos we would use in the current matrix, i.e. below | |
11974 | last_unchanged_at_beg_row. */ | |
11975 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
11976 | current_matrix); | |
11977 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
11978 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
11979 | ||
11980 | xassert (it.hpos == 0 && it.current_x == 0); | |
11981 | } | |
11982 | else | |
11983 | { | |
11984 | /* There are no reusable lines at the start of the window. | |
11985 | Start displaying in the first line. */ | |
11986 | start_display (&it, w, start); | |
11987 | start_pos = it.current.pos; | |
11988 | } | |
11989 | ||
5f5c8ee5 GM |
11990 | /* Find the first row that is not affected by changes at the end of |
11991 | the buffer. Value will be null if there is no unchanged row, in | |
11992 | which case we must redisplay to the end of the window. delta | |
11993 | will be set to the value by which buffer positions beginning with | |
11994 | first_unchanged_at_end_row have to be adjusted due to text | |
11995 | changes. */ | |
11996 | first_unchanged_at_end_row | |
1ec185cb | 11997 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
11998 | IF_DEBUG (debug_delta = delta); |
11999 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
2311178e | 12000 | |
5f5c8ee5 GM |
12001 | /* Set stop_pos to the buffer position up to which we will have to |
12002 | display new lines. If first_unchanged_at_end_row != NULL, this | |
12003 | is the buffer position of the start of the line displayed in that | |
12004 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
12005 | that we don't stop at a buffer position. */ | |
12006 | stop_pos = 0; | |
12007 | if (first_unchanged_at_end_row) | |
12008 | { | |
12009 | xassert (last_unchanged_at_beg_row == NULL | |
12010 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
2311178e | 12011 | |
5f5c8ee5 GM |
12012 | /* If this is a continuation line, move forward to the next one |
12013 | that isn't. Changes in lines above affect this line. | |
12014 | Caution: this may move first_unchanged_at_end_row to a row | |
12015 | not displaying text. */ | |
12016 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
12017 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
12018 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
12019 | < it.last_visible_y)) | |
12020 | ++first_unchanged_at_end_row; | |
12021 | ||
12022 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
12023 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
12024 | >= it.last_visible_y)) | |
12025 | first_unchanged_at_end_row = NULL; | |
12026 | else | |
12027 | { | |
12028 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
12029 | + delta); | |
12030 | first_unchanged_at_end_vpos | |
12031 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 12032 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
12033 | } |
12034 | } | |
12035 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 12036 | GIVE_UP (19); |
5f5c8ee5 GM |
12037 | |
12038 | ||
12039 | #if GLYPH_DEBUG | |
2311178e | 12040 | |
5f5c8ee5 GM |
12041 | /* Either there is no unchanged row at the end, or the one we have |
12042 | now displays text. This is a necessary condition for the window | |
12043 | end pos calculation at the end of this function. */ | |
12044 | xassert (first_unchanged_at_end_row == NULL | |
12045 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
2311178e | 12046 | |
5f5c8ee5 GM |
12047 | debug_last_unchanged_at_beg_vpos |
12048 | = (last_unchanged_at_beg_row | |
12049 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
12050 | : -1); | |
12051 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
2311178e | 12052 | |
5f5c8ee5 GM |
12053 | #endif /* GLYPH_DEBUG != 0 */ |
12054 | ||
2311178e | 12055 | |
5f5c8ee5 GM |
12056 | /* Display new lines. Set last_text_row to the last new line |
12057 | displayed which has text on it, i.e. might end up as being the | |
12058 | line where the window_end_vpos is. */ | |
12059 | w->cursor.vpos = -1; | |
12060 | last_text_row = NULL; | |
12061 | overlay_arrow_seen = 0; | |
12062 | while (it.current_y < it.last_visible_y | |
12063 | && !fonts_changed_p | |
12064 | && (first_unchanged_at_end_row == NULL | |
12065 | || IT_CHARPOS (it) < stop_pos)) | |
12066 | { | |
12067 | if (display_line (&it)) | |
12068 | last_text_row = it.glyph_row - 1; | |
12069 | } | |
12070 | ||
12071 | if (fonts_changed_p) | |
12072 | return -1; | |
12073 | ||
12074 | ||
12075 | /* Compute differences in buffer positions, y-positions etc. for | |
12076 | lines reused at the bottom of the window. Compute what we can | |
12077 | scroll. */ | |
ca42b2e8 GM |
12078 | if (first_unchanged_at_end_row |
12079 | /* No lines reused because we displayed everything up to the | |
12080 | bottom of the window. */ | |
12081 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
12082 | { |
12083 | dvpos = (it.vpos | |
12084 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
12085 | current_matrix)); | |
12086 | dy = it.current_y - first_unchanged_at_end_row->y; | |
12087 | run.current_y = first_unchanged_at_end_row->y; | |
12088 | run.desired_y = run.current_y + dy; | |
12089 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
12090 | } | |
12091 | else | |
ca42b2e8 GM |
12092 | { |
12093 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
12094 | first_unchanged_at_end_row = NULL; | |
12095 | } | |
5f5c8ee5 GM |
12096 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
12097 | ||
8f8ba186 | 12098 | |
5f5c8ee5 GM |
12099 | /* Find the cursor if not already found. We have to decide whether |
12100 | PT will appear on this window (it sometimes doesn't, but this is | |
12101 | not a very frequent case.) This decision has to be made before | |
12102 | the current matrix is altered. A value of cursor.vpos < 0 means | |
12103 | that PT is either in one of the lines beginning at | |
12104 | first_unchanged_at_end_row or below the window. Don't care for | |
12105 | lines that might be displayed later at the window end; as | |
12106 | mentioned, this is not a frequent case. */ | |
12107 | if (w->cursor.vpos < 0) | |
12108 | { | |
5f5c8ee5 GM |
12109 | /* Cursor in unchanged rows at the top? */ |
12110 | if (PT < CHARPOS (start_pos) | |
12111 | && last_unchanged_at_beg_row) | |
12112 | { | |
e037b9ec GM |
12113 | row = row_containing_pos (w, PT, |
12114 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 12115 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
12116 | if (row) |
12117 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
12118 | } |
12119 | ||
12120 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
12121 | else if (first_unchanged_at_end_row) | |
12122 | { | |
e037b9ec | 12123 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 12124 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 12125 | if (row) |
468155d7 GM |
12126 | set_cursor_from_row (w, row, w->current_matrix, delta, |
12127 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
12128 | } |
12129 | ||
12130 | /* Give up if cursor was not found. */ | |
12131 | if (w->cursor.vpos < 0) | |
12132 | { | |
12133 | clear_glyph_matrix (w->desired_matrix); | |
12134 | return -1; | |
12135 | } | |
12136 | } | |
2311178e | 12137 | |
5f5c8ee5 GM |
12138 | /* Don't let the cursor end in the scroll margins. */ |
12139 | { | |
12140 | int this_scroll_margin, cursor_height; | |
2311178e | 12141 | |
5f5c8ee5 GM |
12142 | this_scroll_margin = max (0, scroll_margin); |
12143 | this_scroll_margin = min (this_scroll_margin, | |
12144 | XFASTINT (w->height) / 4); | |
12145 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
12146 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
2311178e | 12147 | |
5f5c8ee5 GM |
12148 | if ((w->cursor.y < this_scroll_margin |
12149 | && CHARPOS (start) > BEGV) | |
12150 | /* Don't take scroll margin into account at the bottom because | |
12151 | old redisplay didn't do it either. */ | |
12152 | || w->cursor.y + cursor_height > it.last_visible_y) | |
12153 | { | |
12154 | w->cursor.vpos = -1; | |
12155 | clear_glyph_matrix (w->desired_matrix); | |
12156 | return -1; | |
12157 | } | |
12158 | } | |
12159 | ||
12160 | /* Scroll the display. Do it before changing the current matrix so | |
12161 | that xterm.c doesn't get confused about where the cursor glyph is | |
12162 | found. */ | |
fa77249f | 12163 | if (dy && run.height) |
5f5c8ee5 GM |
12164 | { |
12165 | update_begin (f); | |
2311178e | 12166 | |
5f5c8ee5 GM |
12167 | if (FRAME_WINDOW_P (f)) |
12168 | { | |
12169 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 12170 | rif->clear_mouse_face (w); |
5f5c8ee5 | 12171 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 12172 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
12173 | } |
12174 | else | |
12175 | { | |
12176 | /* Terminal frame. In this case, dvpos gives the number of | |
12177 | lines to scroll by; dvpos < 0 means scroll up. */ | |
12178 | int first_unchanged_at_end_vpos | |
12179 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
12180 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
522ed7fb GM |
12181 | int end = (XFASTINT (w->top) |
12182 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) | |
12183 | + window_internal_height (w)); | |
2311178e | 12184 | |
5f5c8ee5 GM |
12185 | /* Perform the operation on the screen. */ |
12186 | if (dvpos > 0) | |
12187 | { | |
12188 | /* Scroll last_unchanged_at_beg_row to the end of the | |
12189 | window down dvpos lines. */ | |
12190 | set_terminal_window (end); | |
12191 | ||
12192 | /* On dumb terminals delete dvpos lines at the end | |
12193 | before inserting dvpos empty lines. */ | |
12194 | if (!scroll_region_ok) | |
12195 | ins_del_lines (end - dvpos, -dvpos); | |
12196 | ||
12197 | /* Insert dvpos empty lines in front of | |
12198 | last_unchanged_at_beg_row. */ | |
12199 | ins_del_lines (from, dvpos); | |
12200 | } | |
12201 | else if (dvpos < 0) | |
12202 | { | |
12203 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
12204 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
12205 | set_terminal_window (end); | |
12206 | ||
12207 | /* Delete dvpos lines in front of | |
12208 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
12209 | the cursor to the given vpos and emit |dvpos| delete | |
12210 | line sequences. */ | |
12211 | ins_del_lines (from + dvpos, dvpos); | |
12212 | ||
12213 | /* On a dumb terminal insert dvpos empty lines at the | |
12214 | end. */ | |
12215 | if (!scroll_region_ok) | |
12216 | ins_del_lines (end + dvpos, -dvpos); | |
12217 | } | |
2311178e | 12218 | |
5f5c8ee5 GM |
12219 | set_terminal_window (0); |
12220 | } | |
2311178e | 12221 | |
5f5c8ee5 GM |
12222 | update_end (f); |
12223 | } | |
12224 | ||
ca42b2e8 GM |
12225 | /* Shift reused rows of the current matrix to the right position. |
12226 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
12227 | text. */ | |
12228 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
12229 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
12230 | if (dvpos < 0) |
12231 | { | |
12232 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
12233 | bottom_vpos, dvpos); | |
12234 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
12235 | bottom_vpos, 0); | |
12236 | } | |
12237 | else if (dvpos > 0) | |
12238 | { | |
12239 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
12240 | bottom_vpos, dvpos); | |
12241 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
12242 | first_unchanged_at_end_vpos + dvpos, 0); | |
12243 | } | |
12244 | ||
12245 | /* For frame-based redisplay, make sure that current frame and window | |
12246 | matrix are in sync with respect to glyph memory. */ | |
12247 | if (!FRAME_WINDOW_P (f)) | |
12248 | sync_frame_with_window_matrix_rows (w); | |
12249 | ||
12250 | /* Adjust buffer positions in reused rows. */ | |
12251 | if (delta) | |
f2d86d7a GM |
12252 | increment_matrix_positions (current_matrix, |
12253 | first_unchanged_at_end_vpos + dvpos, | |
12254 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
12255 | |
12256 | /* Adjust Y positions. */ | |
12257 | if (dy) | |
12258 | shift_glyph_matrix (w, current_matrix, | |
12259 | first_unchanged_at_end_vpos + dvpos, | |
12260 | bottom_vpos, dy); | |
12261 | ||
12262 | if (first_unchanged_at_end_row) | |
12263 | first_unchanged_at_end_row += dvpos; | |
12264 | ||
12265 | /* If scrolling up, there may be some lines to display at the end of | |
12266 | the window. */ | |
12267 | last_text_row_at_end = NULL; | |
12268 | if (dy < 0) | |
12269 | { | |
9c6ba6d1 GM |
12270 | /* Scrolling up can leave for example a partially visible line |
12271 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
12272 | /* Set last_row to the glyph row in the current matrix where the |
12273 | window end line is found. It has been moved up or down in | |
12274 | the matrix by dvpos. */ | |
12275 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
12276 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
12277 | ||
12278 | /* If last_row is the window end line, it should display text. */ | |
12279 | xassert (last_row->displays_text_p); | |
12280 | ||
12281 | /* If window end line was partially visible before, begin | |
12282 | displaying at that line. Otherwise begin displaying with the | |
12283 | line following it. */ | |
12284 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
12285 | { | |
12286 | init_to_row_start (&it, w, last_row); | |
12287 | it.vpos = last_vpos; | |
12288 | it.current_y = last_row->y; | |
12289 | } | |
12290 | else | |
12291 | { | |
12292 | init_to_row_end (&it, w, last_row); | |
12293 | it.vpos = 1 + last_vpos; | |
12294 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
12295 | ++last_row; | |
12296 | } | |
12adba34 | 12297 | |
23e8bd86 GM |
12298 | /* We may start in a continuation line. If so, we have to |
12299 | get the right continuation_lines_width and current_x. */ | |
12300 | it.continuation_lines_width = last_row->continuation_lines_width; | |
12301 | it.hpos = it.current_x = 0; | |
2311178e | 12302 | |
23e8bd86 GM |
12303 | /* Display the rest of the lines at the window end. */ |
12304 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
12305 | while (it.current_y < it.last_visible_y | |
12306 | && !fonts_changed_p) | |
5f5c8ee5 | 12307 | { |
23e8bd86 GM |
12308 | /* Is it always sure that the display agrees with lines in |
12309 | the current matrix? I don't think so, so we mark rows | |
12310 | displayed invalid in the current matrix by setting their | |
12311 | enabled_p flag to zero. */ | |
12312 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
12313 | if (display_line (&it)) | |
12314 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
12315 | } |
12316 | } | |
12adba34 | 12317 | |
5f5c8ee5 GM |
12318 | /* Update window_end_pos and window_end_vpos. */ |
12319 | if (first_unchanged_at_end_row | |
12320 | && first_unchanged_at_end_row->y < it.last_visible_y | |
12321 | && !last_text_row_at_end) | |
12322 | { | |
12323 | /* Window end line if one of the preserved rows from the current | |
12324 | matrix. Set row to the last row displaying text in current | |
12325 | matrix starting at first_unchanged_at_end_row, after | |
12326 | scrolling. */ | |
12327 | xassert (first_unchanged_at_end_row->displays_text_p); | |
12328 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
12329 | first_unchanged_at_end_row); | |
12330 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
2311178e | 12331 | |
ac90c44f | 12332 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 12333 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
12334 | w->window_end_vpos |
12335 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 12336 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12337 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
12338 | } |
12339 | else if (last_text_row_at_end) | |
12340 | { | |
ac90c44f GM |
12341 | w->window_end_pos |
12342 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
12343 | w->window_end_bytepos |
12344 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
12345 | w->window_end_vpos |
12346 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 12347 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12348 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
12349 | } |
12350 | else if (last_text_row) | |
12351 | { | |
12352 | /* We have displayed either to the end of the window or at the | |
12353 | end of the window, i.e. the last row with text is to be found | |
12354 | in the desired matrix. */ | |
ac90c44f GM |
12355 | w->window_end_pos |
12356 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
12357 | w->window_end_bytepos |
12358 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12359 | w->window_end_vpos |
12360 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 12361 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
12362 | } |
12363 | else if (first_unchanged_at_end_row == NULL | |
12364 | && last_text_row == NULL | |
12365 | && last_text_row_at_end == NULL) | |
12366 | { | |
12367 | /* Displayed to end of window, but no line containing text was | |
12368 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
12369 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
12370 | int vpos = XFASTINT (w->window_end_vpos); | |
12371 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
12372 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
12373 | ||
12374 | for (row = NULL; | |
12375 | row == NULL && vpos >= first_vpos; | |
12376 | --vpos, --current_row, --desired_row) | |
12377 | { | |
12378 | if (desired_row->enabled_p) | |
12379 | { | |
12380 | if (desired_row->displays_text_p) | |
12381 | row = desired_row; | |
12382 | } | |
12383 | else if (current_row->displays_text_p) | |
12384 | row = current_row; | |
12385 | } | |
12adba34 | 12386 | |
0416532f | 12387 | xassert (row != NULL); |
d88a79d4 | 12388 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
12389 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
12390 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 12391 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12392 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
12393 | } |
12394 | else | |
12395 | abort (); | |
ac90c44f | 12396 | |
8cdb267e GM |
12397 | #if 0 /* This leads to problems, for instance when the cursor is |
12398 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
12399 | /* Disable rows below what's displayed in the window. This makes |
12400 | debugging easier. */ | |
12401 | enable_glyph_matrix_rows (current_matrix, | |
12402 | XFASTINT (w->window_end_vpos) + 1, | |
12403 | bottom_vpos, 0); | |
8cdb267e | 12404 | #endif |
23e8bd86 | 12405 | |
5f5c8ee5 GM |
12406 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
12407 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 12408 | |
5f5c8ee5 GM |
12409 | /* Record that display has not been completed. */ |
12410 | w->window_end_valid = Qnil; | |
12411 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 12412 | return 3; |
27d16f05 GM |
12413 | |
12414 | #undef GIVE_UP | |
12adba34 | 12415 | } |
0f9c0ff0 | 12416 | |
a2889657 | 12417 | |
5f5c8ee5 GM |
12418 | \f |
12419 | /*********************************************************************** | |
12420 | More debugging support | |
12421 | ***********************************************************************/ | |
a2889657 | 12422 | |
5f5c8ee5 | 12423 | #if GLYPH_DEBUG |
a2889657 | 12424 | |
eaaa65b0 | 12425 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 12426 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 12427 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 12428 | |
31b24551 | 12429 | |
9ab436b9 | 12430 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 12431 | |
9ab436b9 GM |
12432 | GLYPHS 0 means don't show glyph contents. |
12433 | GLYPHS 1 means show glyphs in short form | |
12434 | GLYPHS > 1 means show glyphs in long form. */ | |
12435 | ||
12436 | void | |
12437 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 12438 | struct glyph_matrix *matrix; |
9ab436b9 | 12439 | int glyphs; |
5f5c8ee5 | 12440 | { |
efc63ef0 | 12441 | int i; |
5f5c8ee5 | 12442 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 12443 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 12444 | } |
31b24551 | 12445 | |
68a37fa8 | 12446 | |
e187cf71 GM |
12447 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
12448 | the glyph row and area where the glyph comes from. */ | |
12449 | ||
12450 | void | |
12451 | dump_glyph (row, glyph, area) | |
12452 | struct glyph_row *row; | |
12453 | struct glyph *glyph; | |
12454 | int area; | |
12455 | { | |
12456 | if (glyph->type == CHAR_GLYPH) | |
12457 | { | |
12458 | fprintf (stderr, | |
12459 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12460 | glyph - row->glyphs[TEXT_AREA], | |
12461 | 'C', | |
12462 | glyph->charpos, | |
12463 | (BUFFERP (glyph->object) | |
12464 | ? 'B' | |
12465 | : (STRINGP (glyph->object) | |
12466 | ? 'S' | |
12467 | : '-')), | |
12468 | glyph->pixel_width, | |
12469 | glyph->u.ch, | |
12470 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
12471 | ? glyph->u.ch | |
12472 | : '.'), | |
12473 | glyph->face_id, | |
12474 | glyph->left_box_line_p, | |
12475 | glyph->right_box_line_p); | |
12476 | } | |
12477 | else if (glyph->type == STRETCH_GLYPH) | |
12478 | { | |
12479 | fprintf (stderr, | |
12480 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12481 | glyph - row->glyphs[TEXT_AREA], | |
12482 | 'S', | |
12483 | glyph->charpos, | |
12484 | (BUFFERP (glyph->object) | |
12485 | ? 'B' | |
12486 | : (STRINGP (glyph->object) | |
12487 | ? 'S' | |
12488 | : '-')), | |
12489 | glyph->pixel_width, | |
12490 | 0, | |
12491 | '.', | |
12492 | glyph->face_id, | |
12493 | glyph->left_box_line_p, | |
12494 | glyph->right_box_line_p); | |
12495 | } | |
12496 | else if (glyph->type == IMAGE_GLYPH) | |
12497 | { | |
12498 | fprintf (stderr, | |
12499 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12500 | glyph - row->glyphs[TEXT_AREA], | |
12501 | 'I', | |
12502 | glyph->charpos, | |
12503 | (BUFFERP (glyph->object) | |
12504 | ? 'B' | |
12505 | : (STRINGP (glyph->object) | |
12506 | ? 'S' | |
12507 | : '-')), | |
12508 | glyph->pixel_width, | |
12509 | glyph->u.img_id, | |
12510 | '.', | |
12511 | glyph->face_id, | |
12512 | glyph->left_box_line_p, | |
12513 | glyph->right_box_line_p); | |
12514 | } | |
12515 | } | |
12516 | ||
12517 | ||
5f5c8ee5 | 12518 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
12519 | GLYPHS 0 means don't show glyph contents. |
12520 | GLYPHS 1 means show glyphs in short form | |
12521 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 12522 | |
5f5c8ee5 | 12523 | void |
eaaa65b0 GM |
12524 | dump_glyph_row (row, vpos, glyphs) |
12525 | struct glyph_row *row; | |
9ab436b9 | 12526 | int vpos, glyphs; |
5f5c8ee5 | 12527 | { |
9ab436b9 GM |
12528 | if (glyphs != 1) |
12529 | { | |
b94c0d9c | 12530 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n"); |
9ab436b9 | 12531 | fprintf (stderr, "=======================================================================\n"); |
2311178e | 12532 | |
0ad38729 | 12533 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 12534 | %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d %4d %4d %4d %4d\n", |
eaaa65b0 | 12535 | vpos, |
9ab436b9 GM |
12536 | MATRIX_ROW_START_CHARPOS (row), |
12537 | MATRIX_ROW_END_CHARPOS (row), | |
12538 | row->used[TEXT_AREA], | |
12539 | row->contains_overlapping_glyphs_p, | |
12540 | row->enabled_p, | |
9ab436b9 GM |
12541 | row->truncated_on_left_p, |
12542 | row->truncated_on_right_p, | |
12543 | row->overlay_arrow_p, | |
12544 | row->continued_p, | |
12545 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
12546 | row->displays_text_p, | |
12547 | row->ends_at_zv_p, | |
12548 | row->fill_line_p, | |
12549 | row->ends_in_middle_of_char_p, | |
12550 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 12551 | row->mouse_face_p, |
9ab436b9 GM |
12552 | row->x, |
12553 | row->y, | |
12554 | row->pixel_width, | |
12555 | row->height, | |
12556 | row->visible_height, | |
12557 | row->ascent, | |
12558 | row->phys_ascent); | |
33ea6c4d GM |
12559 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
12560 | row->end.overlay_string_index, | |
12561 | row->continuation_lines_width); | |
9ab436b9 GM |
12562 | fprintf (stderr, "%9d %5d\n", |
12563 | CHARPOS (row->start.string_pos), | |
12564 | CHARPOS (row->end.string_pos)); | |
12565 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
12566 | row->end.dpvec_index); | |
12567 | } | |
2311178e | 12568 | |
9ab436b9 | 12569 | if (glyphs > 1) |
bd66d1ba | 12570 | { |
e187cf71 GM |
12571 | int area; |
12572 | ||
12573 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12574 | { | |
091f8878 GM |
12575 | struct glyph *glyph = row->glyphs[area]; |
12576 | struct glyph *glyph_end = glyph + row->used[area]; | |
2311178e | 12577 | |
e187cf71 | 12578 | /* Glyph for a line end in text. */ |
091f8878 | 12579 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 12580 | ++glyph_end; |
2311178e | 12581 | |
e187cf71 GM |
12582 | if (glyph < glyph_end) |
12583 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
2311178e | 12584 | |
e187cf71 GM |
12585 | for (; glyph < glyph_end; ++glyph) |
12586 | dump_glyph (row, glyph, area); | |
f7b4b63a | 12587 | } |
f4faa47c | 12588 | } |
9ab436b9 GM |
12589 | else if (glyphs == 1) |
12590 | { | |
e187cf71 | 12591 | int area; |
9ab436b9 | 12592 | |
e187cf71 | 12593 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 12594 | { |
e187cf71 GM |
12595 | char *s = (char *) alloca (row->used[area] + 1); |
12596 | int i; | |
12597 | ||
12598 | for (i = 0; i < row->used[area]; ++i) | |
12599 | { | |
12600 | struct glyph *glyph = row->glyphs[area] + i; | |
12601 | if (glyph->type == CHAR_GLYPH | |
12602 | && glyph->u.ch < 0x80 | |
12603 | && glyph->u.ch >= ' ') | |
12604 | s[i] = glyph->u.ch; | |
12605 | else | |
12606 | s[i] = '.'; | |
12607 | } | |
2311178e | 12608 | |
e187cf71 GM |
12609 | s[i] = '\0'; |
12610 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
12611 | } | |
9ab436b9 | 12612 | } |
5f5c8ee5 | 12613 | } |
f4faa47c | 12614 | |
a2889657 | 12615 | |
5f5c8ee5 GM |
12616 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
12617 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 12618 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
12619 | Shows contents of glyph row structures. With non-nil |
12620 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
12621 | glyphs in short form, otherwise show glyphs in long form. */) |
12622 | (glyphs) | |
9ab436b9 | 12623 | Lisp_Object glyphs; |
5f5c8ee5 GM |
12624 | { |
12625 | struct window *w = XWINDOW (selected_window); | |
12626 | struct buffer *buffer = XBUFFER (w->buffer); | |
12627 | ||
12628 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
12629 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
12630 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
12631 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
12632 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
12633 | dump_glyph_matrix (w->current_matrix, |
12634 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
12635 | return Qnil; |
12636 | } | |
1c2250c2 | 12637 | |
1fca3fae | 12638 | |
7d4cc828 GM |
12639 | DEFUN ("dump-frame-glyph-matrix", Fdump_frame_glyph_matrix, |
12640 | Sdump_frame_glyph_matrix, 0, 0, "", doc: /* */) | |
12641 | () | |
12642 | { | |
12643 | struct frame *f = XFRAME (selected_frame); | |
12644 | dump_glyph_matrix (f->current_matrix, 1); | |
12645 | return Qnil; | |
12646 | } | |
12647 | ||
12648 | ||
e9abc296 | 12649 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 12650 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
12651 | GLYPH 0 means don't dump glyphs. |
12652 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12653 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12654 | (row, glyphs) | |
e9abc296 | 12655 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12656 | { |
eaaa65b0 GM |
12657 | struct glyph_matrix *matrix; |
12658 | int vpos; | |
2311178e | 12659 | |
b7826503 | 12660 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12661 | matrix = XWINDOW (selected_window)->current_matrix; |
12662 | vpos = XINT (row); | |
12663 | if (vpos >= 0 && vpos < matrix->nrows) | |
12664 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
12665 | vpos, | |
12666 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12667 | return Qnil; |
12668 | } | |
1fca3fae | 12669 | |
67481ae5 | 12670 | |
b94c0d9c | 12671 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 12672 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
12673 | GLYPH 0 means don't dump glyphs. |
12674 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12675 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12676 | (row, glyphs) | |
b94c0d9c | 12677 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12678 | { |
886bd6f2 | 12679 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
12680 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
12681 | int vpos; | |
2311178e | 12682 | |
b7826503 | 12683 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12684 | vpos = XINT (row); |
12685 | if (vpos >= 0 && vpos < m->nrows) | |
12686 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
12687 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12688 | return Qnil; |
12689 | } | |
ca26e1c8 | 12690 | |
0f9c0ff0 | 12691 | |
62397849 | 12692 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
12693 | doc: /* Toggle tracing of redisplay. |
12694 | With ARG, turn tracing on if and only if ARG is positive. */) | |
12695 | (arg) | |
62397849 | 12696 | Lisp_Object arg; |
5f5c8ee5 | 12697 | { |
62397849 GM |
12698 | if (NILP (arg)) |
12699 | trace_redisplay_p = !trace_redisplay_p; | |
12700 | else | |
12701 | { | |
12702 | arg = Fprefix_numeric_value (arg); | |
12703 | trace_redisplay_p = XINT (arg) > 0; | |
12704 | } | |
2311178e | 12705 | |
5f5c8ee5 GM |
12706 | return Qnil; |
12707 | } | |
bf9249e3 GM |
12708 | |
12709 | ||
f4a374a1 | 12710 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
e9757d41 SM |
12711 | doc: /* Like `format', but print result to stderr. |
12712 | usage: (trace-to-stderr STRING &rest OBJECTS) */) | |
7ee72033 | 12713 | (nargs, args) |
f4a374a1 GM |
12714 | int nargs; |
12715 | Lisp_Object *args; | |
bf9249e3 | 12716 | { |
f4a374a1 | 12717 | Lisp_Object s = Fformat (nargs, args); |
2051c264 | 12718 | fprintf (stderr, "%s", SDATA (s)); |
bf9249e3 GM |
12719 | return Qnil; |
12720 | } | |
2311178e | 12721 | |
5f5c8ee5 | 12722 | #endif /* GLYPH_DEBUG */ |
ca26e1c8 | 12723 | |
ca26e1c8 | 12724 | |
5f5c8ee5 GM |
12725 | \f |
12726 | /*********************************************************************** | |
12727 | Building Desired Matrix Rows | |
12728 | ***********************************************************************/ | |
a2889657 | 12729 | |
5f5c8ee5 GM |
12730 | /* Return a temporary glyph row holding the glyphs of an overlay |
12731 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 12732 | |
5f5c8ee5 GM |
12733 | static struct glyph_row * |
12734 | get_overlay_arrow_glyph_row (w) | |
12735 | struct window *w; | |
12736 | { | |
12737 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
12738 | struct buffer *buffer = XBUFFER (w->buffer); | |
12739 | struct buffer *old = current_buffer; | |
50f80c2f | 12740 | const unsigned char *arrow_string = SDATA (Voverlay_arrow_string); |
2051c264 | 12741 | int arrow_len = SCHARS (Voverlay_arrow_string); |
50f80c2f KR |
12742 | const unsigned char *arrow_end = arrow_string + arrow_len; |
12743 | const unsigned char *p; | |
5f5c8ee5 GM |
12744 | struct it it; |
12745 | int multibyte_p; | |
12746 | int n_glyphs_before; | |
12747 | ||
12748 | set_buffer_temp (buffer); | |
12749 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
12750 | it.glyph_row->used[TEXT_AREA] = 0; | |
12751 | SET_TEXT_POS (it.position, 0, 0); | |
12752 | ||
12753 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
12754 | p = arrow_string; | |
12755 | while (p < arrow_end) | |
12756 | { | |
12757 | Lisp_Object face, ilisp; | |
2311178e | 12758 | |
5f5c8ee5 GM |
12759 | /* Get the next character. */ |
12760 | if (multibyte_p) | |
4fdb80f2 | 12761 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
12762 | else |
12763 | it.c = *p, it.len = 1; | |
12764 | p += it.len; | |
2311178e | 12765 | |
5f5c8ee5 | 12766 | /* Get its face. */ |
ac90c44f | 12767 | ilisp = make_number (p - arrow_string); |
5f5c8ee5 GM |
12768 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
12769 | it.face_id = compute_char_face (f, it.c, face); | |
12770 | ||
12771 | /* Compute its width, get its glyphs. */ | |
12772 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 12773 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
12774 | PRODUCE_GLYPHS (&it); |
12775 | ||
12776 | /* If this character doesn't fit any more in the line, we have | |
12777 | to remove some glyphs. */ | |
12778 | if (it.current_x > it.last_visible_x) | |
12779 | { | |
12780 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
12781 | break; | |
12782 | } | |
12783 | } | |
2311178e | 12784 | |
5f5c8ee5 GM |
12785 | set_buffer_temp (old); |
12786 | return it.glyph_row; | |
12787 | } | |
ca26e1c8 | 12788 | |
b0a0fbda | 12789 | |
5f5c8ee5 GM |
12790 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
12791 | glyphs are only inserted for terminal frames since we can't really | |
12792 | win with truncation glyphs when partially visible glyphs are | |
12793 | involved. Which glyphs to insert is determined by | |
12794 | produce_special_glyphs. */ | |
67481ae5 | 12795 | |
5f5c8ee5 GM |
12796 | static void |
12797 | insert_left_trunc_glyphs (it) | |
12798 | struct it *it; | |
12799 | { | |
12800 | struct it truncate_it; | |
12801 | struct glyph *from, *end, *to, *toend; | |
12802 | ||
12803 | xassert (!FRAME_WINDOW_P (it->f)); | |
12804 | ||
12805 | /* Get the truncation glyphs. */ | |
12806 | truncate_it = *it; | |
5f5c8ee5 GM |
12807 | truncate_it.current_x = 0; |
12808 | truncate_it.face_id = DEFAULT_FACE_ID; | |
12809 | truncate_it.glyph_row = &scratch_glyph_row; | |
12810 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
12811 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 12812 | truncate_it.object = make_number (0); |
5f5c8ee5 | 12813 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
2311178e | 12814 | |
5f5c8ee5 GM |
12815 | /* Overwrite glyphs from IT with truncation glyphs. */ |
12816 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12817 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
12818 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
12819 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
12820 | ||
12821 | while (from < end) | |
12822 | *to++ = *from++; | |
12823 | ||
37be86f2 KH |
12824 | /* There may be padding glyphs left over. Overwrite them too. */ |
12825 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
12826 | { | |
12827 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12828 | while (from < end) | |
12829 | *to++ = *from++; | |
12830 | } | |
5f5c8ee5 | 12831 | |
37be86f2 KH |
12832 | if (to > toend) |
12833 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 12834 | } |
e0bfbde6 | 12835 | |
e0bfbde6 | 12836 | |
5f5c8ee5 | 12837 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 12838 | |
5f5c8ee5 GM |
12839 | Most of the time, ascent and height of a display line will be equal |
12840 | to the max_ascent and max_height values of the display iterator | |
12841 | structure. This is not the case if | |
67481ae5 | 12842 | |
5f5c8ee5 GM |
12843 | 1. We hit ZV without displaying anything. In this case, max_ascent |
12844 | and max_height will be zero. | |
1c9241f5 | 12845 | |
5f5c8ee5 GM |
12846 | 2. We have some glyphs that don't contribute to the line height. |
12847 | (The glyph row flag contributes_to_line_height_p is for future | |
12848 | pixmap extensions). | |
f6fd109b | 12849 | |
5f5c8ee5 GM |
12850 | The first case is easily covered by using default values because in |
12851 | these cases, the line height does not really matter, except that it | |
12852 | must not be zero. */ | |
67481ae5 | 12853 | |
5f5c8ee5 GM |
12854 | static void |
12855 | compute_line_metrics (it) | |
12856 | struct it *it; | |
12857 | { | |
12858 | struct glyph_row *row = it->glyph_row; | |
12859 | int area, i; | |
1c2250c2 | 12860 | |
5f5c8ee5 GM |
12861 | if (FRAME_WINDOW_P (it->f)) |
12862 | { | |
75c5350a | 12863 | int i, min_y, max_y; |
1c2250c2 | 12864 | |
5f5c8ee5 GM |
12865 | /* The line may consist of one space only, that was added to |
12866 | place the cursor on it. If so, the row's height hasn't been | |
12867 | computed yet. */ | |
12868 | if (row->height == 0) | |
12869 | { | |
12870 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 12871 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
12872 | row->ascent = it->max_ascent; |
12873 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12874 | row->phys_ascent = it->max_phys_ascent; |
12875 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 | 12876 | } |
2311178e | 12877 | |
5f5c8ee5 GM |
12878 | /* Compute the width of this line. */ |
12879 | row->pixel_width = row->x; | |
12880 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
12881 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
12882 | ||
12883 | xassert (row->pixel_width >= 0); | |
12884 | xassert (row->ascent >= 0 && row->height > 0); | |
12885 | ||
312246d1 GM |
12886 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
12887 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
12888 | ||
12889 | /* If first line's physical ascent is larger than its logical | |
12890 | ascent, use the physical ascent, and make the row taller. | |
12891 | This makes accented characters fully visible. */ | |
b28cb6ed | 12892 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
12893 | && row->phys_ascent > row->ascent) |
12894 | { | |
12895 | row->height += row->phys_ascent - row->ascent; | |
12896 | row->ascent = row->phys_ascent; | |
12897 | } | |
12898 | ||
5f5c8ee5 GM |
12899 | /* Compute how much of the line is visible. */ |
12900 | row->visible_height = row->height; | |
2311178e | 12901 | |
75c5350a GM |
12902 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
12903 | max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
12904 | ||
12905 | if (row->y < min_y) | |
12906 | row->visible_height -= min_y - row->y; | |
12907 | if (row->y + row->height > max_y) | |
12908 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
12909 | } |
12910 | else | |
12911 | { | |
12912 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
12913 | if (row->continued_p) |
12914 | row->pixel_width -= it->continuation_pixel_width; | |
12915 | else if (row->truncated_on_right_p) | |
12916 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
12917 | row->ascent = row->phys_ascent = 0; |
12918 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 12919 | } |
67481ae5 | 12920 | |
5f5c8ee5 GM |
12921 | /* Compute a hash code for this row. */ |
12922 | row->hash = 0; | |
12923 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12924 | for (i = 0; i < row->used[area]; ++i) | |
12925 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
12926 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
12927 | + row->glyphs[area][i].face_id |
12928 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 12929 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 12930 | |
5f5c8ee5 | 12931 | it->max_ascent = it->max_descent = 0; |
312246d1 | 12932 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 12933 | } |
12adba34 | 12934 | |
ca26e1c8 | 12935 | |
5f5c8ee5 GM |
12936 | /* Append one space to the glyph row of iterator IT if doing a |
12937 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
12938 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 12939 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
12940 | |
12941 | This function is called to make sure that there is always one glyph | |
12942 | at the end of a glyph row that the cursor can be set on under | |
12943 | window-systems. (If there weren't such a glyph we would not know | |
12944 | how wide and tall a box cursor should be displayed). | |
12945 | ||
12946 | At the same time this space let's a nicely handle clearing to the | |
12947 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 12948 | |
80c6cb1f | 12949 | static int |
5f5c8ee5 GM |
12950 | append_space (it, default_face_p) |
12951 | struct it *it; | |
12952 | int default_face_p; | |
12953 | { | |
12954 | if (FRAME_WINDOW_P (it->f)) | |
12955 | { | |
12956 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 12957 | |
5f5c8ee5 GM |
12958 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
12959 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 12960 | { |
cafafe0b GM |
12961 | /* Save some values that must not be changed. |
12962 | Must save IT->c and IT->len because otherwise | |
12963 | ITERATOR_AT_END_P wouldn't work anymore after | |
12964 | append_space has been called. */ | |
478d746b | 12965 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
12966 | int saved_c = it->c, saved_len = it->len; |
12967 | int saved_x = it->current_x; | |
5f5c8ee5 | 12968 | int saved_face_id = it->face_id; |
cafafe0b | 12969 | struct text_pos saved_pos; |
5f5c8ee5 | 12970 | Lisp_Object saved_object; |
980806b6 | 12971 | struct face *face; |
5f5c8ee5 GM |
12972 | |
12973 | saved_object = it->object; | |
12974 | saved_pos = it->position; | |
2311178e | 12975 | |
5f5c8ee5 GM |
12976 | it->what = IT_CHARACTER; |
12977 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12978 | it->object = make_number (0); |
5f5c8ee5 GM |
12979 | it->c = ' '; |
12980 | it->len = 1; | |
5f5c8ee5 GM |
12981 | |
12982 | if (default_face_p) | |
12983 | it->face_id = DEFAULT_FACE_ID; | |
4aad61f8 GM |
12984 | else if (it->face_before_selective_p) |
12985 | it->face_id = it->saved_face_id; | |
980806b6 KH |
12986 | face = FACE_FROM_ID (it->f, it->face_id); |
12987 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 12988 | |
5f5c8ee5 | 12989 | PRODUCE_GLYPHS (it); |
2311178e | 12990 | |
5f5c8ee5 GM |
12991 | it->current_x = saved_x; |
12992 | it->object = saved_object; | |
12993 | it->position = saved_pos; | |
12994 | it->what = saved_what; | |
12995 | it->face_id = saved_face_id; | |
cafafe0b GM |
12996 | it->len = saved_len; |
12997 | it->c = saved_c; | |
80c6cb1f | 12998 | return 1; |
5f5c8ee5 GM |
12999 | } |
13000 | } | |
80c6cb1f GM |
13001 | |
13002 | return 0; | |
5f5c8ee5 | 13003 | } |
12adba34 | 13004 | |
1842fc1a | 13005 | |
5f5c8ee5 GM |
13006 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
13007 | to the end of the display line. Called from display_line. | |
13008 | If the glyph row is empty, add a space glyph to it so that we | |
13009 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
2311178e | 13010 | |
5f5c8ee5 GM |
13011 | static void |
13012 | extend_face_to_end_of_line (it) | |
13013 | struct it *it; | |
13014 | { | |
13015 | struct face *face; | |
13016 | struct frame *f = it->f; | |
1842fc1a | 13017 | |
5f5c8ee5 GM |
13018 | /* If line is already filled, do nothing. */ |
13019 | if (it->current_x >= it->last_visible_x) | |
13020 | return; | |
2311178e | 13021 | |
5f5c8ee5 GM |
13022 | /* Face extension extends the background and box of IT->face_id |
13023 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
13024 | of the frame, we don't have to do anything. */ |
13025 | if (it->face_before_selective_p) | |
13026 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
13027 | else | |
13028 | face = FACE_FROM_ID (f, it->face_id); | |
2311178e | 13029 | |
5f5c8ee5 GM |
13030 | if (FRAME_WINDOW_P (f) |
13031 | && face->box == FACE_NO_BOX | |
13032 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
13033 | && !face->stipple) | |
13034 | return; | |
1842fc1a | 13035 | |
5f5c8ee5 GM |
13036 | /* Set the glyph row flag indicating that the face of the last glyph |
13037 | in the text area has to be drawn to the end of the text area. */ | |
13038 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 13039 | |
980806b6 KH |
13040 | /* If current character of IT is not ASCII, make sure we have the |
13041 | ASCII face. This will be automatically undone the next time | |
13042 | get_next_display_element returns a multibyte character. Note | |
13043 | that the character will always be single byte in unibyte text. */ | |
13044 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 13045 | { |
980806b6 | 13046 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 13047 | } |
545e04f6 | 13048 | |
5f5c8ee5 GM |
13049 | if (FRAME_WINDOW_P (f)) |
13050 | { | |
13051 | /* If the row is empty, add a space with the current face of IT, | |
13052 | so that we know which face to draw. */ | |
13053 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 13054 | { |
5f5c8ee5 | 13055 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 13056 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 13057 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 13058 | } |
5f5c8ee5 GM |
13059 | } |
13060 | else | |
13061 | { | |
13062 | /* Save some values that must not be changed. */ | |
13063 | int saved_x = it->current_x; | |
13064 | struct text_pos saved_pos; | |
13065 | Lisp_Object saved_object; | |
478d746b | 13066 | enum display_element_type saved_what = it->what; |
4aad61f8 | 13067 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
13068 | |
13069 | saved_object = it->object; | |
13070 | saved_pos = it->position; | |
2311178e | 13071 | |
5f5c8ee5 GM |
13072 | it->what = IT_CHARACTER; |
13073 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 13074 | it->object = make_number (0); |
5f5c8ee5 GM |
13075 | it->c = ' '; |
13076 | it->len = 1; | |
4aad61f8 | 13077 | it->face_id = face->id; |
2311178e | 13078 | |
5f5c8ee5 | 13079 | PRODUCE_GLYPHS (it); |
2311178e | 13080 | |
5f5c8ee5 GM |
13081 | while (it->current_x <= it->last_visible_x) |
13082 | PRODUCE_GLYPHS (it); | |
2311178e | 13083 | |
5f5c8ee5 GM |
13084 | /* Don't count these blanks really. It would let us insert a left |
13085 | truncation glyph below and make us set the cursor on them, maybe. */ | |
13086 | it->current_x = saved_x; | |
13087 | it->object = saved_object; | |
13088 | it->position = saved_pos; | |
13089 | it->what = saved_what; | |
4aad61f8 | 13090 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
13091 | } |
13092 | } | |
12adba34 | 13093 | |
545e04f6 | 13094 | |
5f5c8ee5 GM |
13095 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
13096 | trailing whitespace. */ | |
1c9241f5 | 13097 | |
5f5c8ee5 GM |
13098 | static int |
13099 | trailing_whitespace_p (charpos) | |
13100 | int charpos; | |
13101 | { | |
13102 | int bytepos = CHAR_TO_BYTE (charpos); | |
13103 | int c = 0; | |
7bbe686f | 13104 | |
5f5c8ee5 GM |
13105 | while (bytepos < ZV_BYTE |
13106 | && (c = FETCH_CHAR (bytepos), | |
13107 | c == ' ' || c == '\t')) | |
13108 | ++bytepos; | |
0d09d1e6 | 13109 | |
8f897821 GM |
13110 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
13111 | { | |
13112 | if (bytepos != PT_BYTE) | |
13113 | return 1; | |
13114 | } | |
13115 | return 0; | |
5f5c8ee5 | 13116 | } |
31b24551 | 13117 | |
545e04f6 | 13118 | |
5f5c8ee5 | 13119 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 13120 | |
5f5c8ee5 GM |
13121 | void |
13122 | highlight_trailing_whitespace (f, row) | |
13123 | struct frame *f; | |
13124 | struct glyph_row *row; | |
13125 | { | |
13126 | int used = row->used[TEXT_AREA]; | |
2311178e | 13127 | |
5f5c8ee5 GM |
13128 | if (used) |
13129 | { | |
13130 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
13131 | struct glyph *glyph = start + used - 1; | |
13132 | ||
ade0bee1 GM |
13133 | /* Skip over glyphs inserted to display the cursor at the |
13134 | end of a line, for extending the face of the last glyph | |
13135 | to the end of the line on terminals, and for truncation | |
13136 | and continuation glyphs. */ | |
65008712 GM |
13137 | while (glyph >= start |
13138 | && glyph->type == CHAR_GLYPH | |
65008712 | 13139 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
13140 | --glyph; |
13141 | ||
13142 | /* If last glyph is a space or stretch, and it's trailing | |
13143 | whitespace, set the face of all trailing whitespace glyphs in | |
13144 | IT->glyph_row to `trailing-whitespace'. */ | |
13145 | if (glyph >= start | |
13146 | && BUFFERP (glyph->object) | |
13147 | && (glyph->type == STRETCH_GLYPH | |
13148 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 13149 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 13150 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 13151 | { |
980806b6 | 13152 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
2311178e | 13153 | |
5f5c8ee5 GM |
13154 | while (glyph >= start |
13155 | && BUFFERP (glyph->object) | |
13156 | && (glyph->type == STRETCH_GLYPH | |
13157 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
13158 | && glyph->u.ch == ' '))) |
13159 | (glyph--)->face_id = face_id; | |
545e04f6 | 13160 | } |
a2889657 | 13161 | } |
5f5c8ee5 | 13162 | } |
a2889657 | 13163 | |
5fcbb24d | 13164 | |
cafafe0b | 13165 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 13166 | used to hold the cursor. */ |
cafafe0b GM |
13167 | |
13168 | static int | |
13169 | cursor_row_p (w, row) | |
13170 | struct window *w; | |
13171 | struct glyph_row *row; | |
13172 | { | |
9a038881 | 13173 | int cursor_row_p = 1; |
2311178e | 13174 | |
cafafe0b GM |
13175 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
13176 | { | |
9a038881 GM |
13177 | /* If the row ends with a newline from a string, we don't want |
13178 | the cursor there (if the row is continued it doesn't end in a | |
13179 | newline). */ | |
13180 | if (CHARPOS (row->end.string_pos) >= 0 | |
13181 | || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
13182 | cursor_row_p = row->continued_p; | |
13183 | ||
13184 | /* If the row ends at ZV, display the cursor at the end of that | |
13185 | row instead of at the start of the row below. */ | |
13186 | else if (row->ends_at_zv_p) | |
13187 | cursor_row_p = 1; | |
13188 | else | |
13189 | cursor_row_p = 0; | |
cafafe0b GM |
13190 | } |
13191 | ||
9a038881 | 13192 | return cursor_row_p; |
cafafe0b GM |
13193 | } |
13194 | ||
13195 | ||
5f5c8ee5 GM |
13196 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
13197 | IT->w from text at the current position of IT. See dispextern.h | |
13198 | for an overview of struct it. Value is non-zero if | |
13199 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
13200 | only. */ | |
2311178e | 13201 | |
5f5c8ee5 GM |
13202 | static int |
13203 | display_line (it) | |
13204 | struct it *it; | |
13205 | { | |
13206 | struct glyph_row *row = it->glyph_row; | |
13207 | ||
13208 | /* We always start displaying at hpos zero even if hscrolled. */ | |
13209 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 13210 | |
5f5c8ee5 GM |
13211 | /* We must not display in a row that's not a text row. */ |
13212 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
13213 | < it->w->desired_matrix->nrows); | |
12adba34 | 13214 | |
5f5c8ee5 GM |
13215 | /* Is IT->w showing the region? */ |
13216 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 13217 | |
5f5c8ee5 GM |
13218 | /* Clear the result glyph row and enable it. */ |
13219 | prepare_desired_row (row); | |
12adba34 | 13220 | |
5f5c8ee5 GM |
13221 | row->y = it->current_y; |
13222 | row->start = it->current; | |
13223 | row->continuation_lines_width = it->continuation_lines_width; | |
13224 | row->displays_text_p = 1; | |
91004049 GM |
13225 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
13226 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
13227 | |
13228 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
13229 | display_line on only one line at a time, in which case this | |
13230 | can't really hurt too much, or we call it on lines which appear | |
13231 | one after another in the buffer, in which case all calls to | |
13232 | recenter_overlay_lists but the first will be pretty cheap. */ | |
13233 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
13234 | ||
5f5c8ee5 GM |
13235 | /* Move over display elements that are not visible because we are |
13236 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
13237 | if the first glyph is partially visible or if we hit a line end. */ | |
13238 | if (it->current_x < it->first_visible_x) | |
13239 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
13240 | MOVE_TO_POS | MOVE_TO_X); | |
13241 | ||
13242 | /* Get the initial row height. This is either the height of the | |
13243 | text hscrolled, if there is any, or zero. */ | |
13244 | row->ascent = it->max_ascent; | |
13245 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
13246 | row->phys_ascent = it->max_phys_ascent; |
13247 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
13248 | |
13249 | /* Loop generating characters. The loop is left with IT on the next | |
13250 | character to display. */ | |
13251 | while (1) | |
13252 | { | |
13253 | int n_glyphs_before, hpos_before, x_before; | |
13254 | int x, i, nglyphs; | |
ae26e27d | 13255 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 13256 | |
5f5c8ee5 GM |
13257 | /* Retrieve the next thing to display. Value is zero if end of |
13258 | buffer reached. */ | |
13259 | if (!get_next_display_element (it)) | |
13260 | { | |
13261 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
13262 | display the cursor there under X. Set the charpos of the |
13263 | first glyph of blank lines not corresponding to any text | |
13264 | to -1. */ | |
13265 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
13266 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 13267 | { |
5f5c8ee5 GM |
13268 | row->glyphs[TEXT_AREA]->charpos = -1; |
13269 | row->displays_text_p = 0; | |
13270 | ||
2ad551af | 13271 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
13272 | && (!MINI_WINDOW_P (it->w) |
13273 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 13274 | row->indicate_empty_line_p = 1; |
a2889657 | 13275 | } |
2311178e | 13276 | |
5f5c8ee5 GM |
13277 | it->continuation_lines_width = 0; |
13278 | row->ends_at_zv_p = 1; | |
13279 | break; | |
a2889657 | 13280 | } |
a2889657 | 13281 | |
5f5c8ee5 GM |
13282 | /* Now, get the metrics of what we want to display. This also |
13283 | generates glyphs in `row' (which is IT->glyph_row). */ | |
13284 | n_glyphs_before = row->used[TEXT_AREA]; | |
13285 | x = it->current_x; | |
e6819faf GM |
13286 | |
13287 | /* Remember the line height so far in case the next element doesn't | |
13288 | fit on the line. */ | |
13289 | if (!it->truncate_lines_p) | |
13290 | { | |
13291 | ascent = it->max_ascent; | |
13292 | descent = it->max_descent; | |
13293 | phys_ascent = it->max_phys_ascent; | |
13294 | phys_descent = it->max_phys_descent; | |
13295 | } | |
2311178e | 13296 | |
5f5c8ee5 | 13297 | PRODUCE_GLYPHS (it); |
a2889657 | 13298 | |
5f5c8ee5 GM |
13299 | /* If this display element was in marginal areas, continue with |
13300 | the next one. */ | |
13301 | if (it->area != TEXT_AREA) | |
a2889657 | 13302 | { |
5f5c8ee5 GM |
13303 | row->ascent = max (row->ascent, it->max_ascent); |
13304 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13305 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13306 | row->phys_height = max (row->phys_height, | |
13307 | it->max_phys_ascent + it->max_phys_descent); | |
cafafe0b | 13308 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13309 | continue; |
13310 | } | |
5936754e | 13311 | |
5f5c8ee5 GM |
13312 | /* Does the display element fit on the line? If we truncate |
13313 | lines, we should draw past the right edge of the window. If | |
13314 | we don't truncate, we want to stop so that we can display the | |
13315 | continuation glyph before the right margin. If lines are | |
13316 | continued, there are two possible strategies for characters | |
13317 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
13318 | glyphs as possible in this line and leave the rest for the | |
13319 | continuation line, or display the whole element in the next | |
13320 | line. Original redisplay did the former, so we do it also. */ | |
13321 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
13322 | hpos_before = it->hpos; | |
13323 | x_before = x; | |
4dcd74e6 | 13324 | |
4b41cebb | 13325 | if (/* Not a newline. */ |
4dcd74e6 | 13326 | nglyphs > 0 |
202c1b5b | 13327 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
13328 | && it->current_x < it->last_visible_x) |
13329 | { | |
37be86f2 | 13330 | it->hpos += nglyphs; |
5f5c8ee5 GM |
13331 | row->ascent = max (row->ascent, it->max_ascent); |
13332 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13333 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13334 | row->phys_height = max (row->phys_height, | |
13335 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13336 | if (it->current_x - it->pixel_width < it->first_visible_x) |
13337 | row->x = x - it->first_visible_x; | |
13338 | } | |
13339 | else | |
13340 | { | |
13341 | int new_x; | |
13342 | struct glyph *glyph; | |
2311178e | 13343 | |
5f5c8ee5 | 13344 | for (i = 0; i < nglyphs; ++i, x = new_x) |
b5bbc9a5 | 13345 | { |
5f5c8ee5 GM |
13346 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
13347 | new_x = x + glyph->pixel_width; | |
13348 | ||
13349 | if (/* Lines are continued. */ | |
13350 | !it->truncate_lines_p | |
13351 | && (/* Glyph doesn't fit on the line. */ | |
13352 | new_x > it->last_visible_x | |
13353 | /* Or it fits exactly on a window system frame. */ | |
13354 | || (new_x == it->last_visible_x | |
13355 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 13356 | { |
5f5c8ee5 | 13357 | /* End of a continued line. */ |
2311178e | 13358 | |
5f5c8ee5 GM |
13359 | if (it->hpos == 0 |
13360 | || (new_x == it->last_visible_x | |
13361 | && FRAME_WINDOW_P (it->f))) | |
13362 | { | |
e6819faf GM |
13363 | /* Current glyph is the only one on the line or |
13364 | fits exactly on the line. We must continue | |
13365 | the line because we can't draw the cursor | |
13366 | after the glyph. */ | |
5f5c8ee5 GM |
13367 | row->continued_p = 1; |
13368 | it->current_x = new_x; | |
13369 | it->continuation_lines_width += new_x; | |
13370 | ++it->hpos; | |
13371 | if (i == nglyphs - 1) | |
cafafe0b | 13372 | set_iterator_to_next (it, 1); |
5f5c8ee5 | 13373 | } |
3b3c4bf0 GM |
13374 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
13375 | && !FRAME_WINDOW_P (it->f)) | |
13376 | { | |
13377 | /* A padding glyph that doesn't fit on this line. | |
13378 | This means the whole character doesn't fit | |
13379 | on the line. */ | |
13380 | row->used[TEXT_AREA] = n_glyphs_before; | |
2311178e | 13381 | |
3b3c4bf0 GM |
13382 | /* Fill the rest of the row with continuation |
13383 | glyphs like in 20.x. */ | |
13384 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
13385 | < row->glyphs[1 + TEXT_AREA]) | |
13386 | produce_special_glyphs (it, IT_CONTINUATION); | |
2311178e | 13387 | |
3b3c4bf0 GM |
13388 | row->continued_p = 1; |
13389 | it->current_x = x_before; | |
13390 | it->continuation_lines_width += x_before; | |
2311178e | 13391 | |
3b3c4bf0 GM |
13392 | /* Restore the height to what it was before the |
13393 | element not fitting on the line. */ | |
13394 | it->max_ascent = ascent; | |
13395 | it->max_descent = descent; | |
13396 | it->max_phys_ascent = phys_ascent; | |
13397 | it->max_phys_descent = phys_descent; | |
13398 | } | |
0df56f4d GM |
13399 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
13400 | { | |
13401 | /* A TAB that extends past the right edge of the | |
13402 | window. This produces a single glyph on | |
13403 | window system frames. We leave the glyph in | |
13404 | this row and let it fill the row, but don't | |
13405 | consume the TAB. */ | |
13406 | it->continuation_lines_width += it->last_visible_x; | |
13407 | row->ends_in_middle_of_char_p = 1; | |
13408 | row->continued_p = 1; | |
13409 | glyph->pixel_width = it->last_visible_x - x; | |
13410 | it->starts_in_middle_of_char_p = 1; | |
13411 | } | |
5f5c8ee5 | 13412 | else |
5936754e | 13413 | { |
0df56f4d GM |
13414 | /* Something other than a TAB that draws past |
13415 | the right edge of the window. Restore | |
13416 | positions to values before the element. */ | |
5f5c8ee5 | 13417 | row->used[TEXT_AREA] = n_glyphs_before + i; |
2311178e | 13418 | |
5f5c8ee5 GM |
13419 | /* Display continuation glyphs. */ |
13420 | if (!FRAME_WINDOW_P (it->f)) | |
13421 | produce_special_glyphs (it, IT_CONTINUATION); | |
13422 | row->continued_p = 1; | |
653c329b | 13423 | |
0df56f4d | 13424 | it->continuation_lines_width += x; |
2311178e | 13425 | |
91004049 GM |
13426 | if (nglyphs > 1 && i > 0) |
13427 | { | |
13428 | row->ends_in_middle_of_char_p = 1; | |
13429 | it->starts_in_middle_of_char_p = 1; | |
13430 | } | |
2311178e | 13431 | |
e6819faf GM |
13432 | /* Restore the height to what it was before the |
13433 | element not fitting on the line. */ | |
13434 | it->max_ascent = ascent; | |
13435 | it->max_descent = descent; | |
13436 | it->max_phys_ascent = phys_ascent; | |
13437 | it->max_phys_descent = phys_descent; | |
5936754e | 13438 | } |
e6819faf | 13439 | |
5f5c8ee5 GM |
13440 | break; |
13441 | } | |
13442 | else if (new_x > it->first_visible_x) | |
13443 | { | |
13444 | /* Increment number of glyphs actually displayed. */ | |
13445 | ++it->hpos; | |
2311178e | 13446 | |
5f5c8ee5 GM |
13447 | if (x < it->first_visible_x) |
13448 | /* Glyph is partially visible, i.e. row starts at | |
13449 | negative X position. */ | |
13450 | row->x = x - it->first_visible_x; | |
13451 | } | |
13452 | else | |
13453 | { | |
13454 | /* Glyph is completely off the left margin of the | |
13455 | window. This should not happen because of the | |
72b8c434 RS |
13456 | move_it_in_display_line at the start of this |
13457 | function, unless the text display area of the | |
13458 | window is empty. */ | |
13459 | xassert (it->first_visible_x <= it->last_visible_x); | |
a2889657 | 13460 | } |
a2889657 | 13461 | } |
2311178e | 13462 | |
5f5c8ee5 GM |
13463 | row->ascent = max (row->ascent, it->max_ascent); |
13464 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13465 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13466 | row->phys_height = max (row->phys_height, | |
13467 | it->max_phys_ascent + it->max_phys_descent); | |
2311178e | 13468 | |
5f5c8ee5 GM |
13469 | /* End of this display line if row is continued. */ |
13470 | if (row->continued_p) | |
13471 | break; | |
a2889657 | 13472 | } |
a2889657 | 13473 | |
5f5c8ee5 GM |
13474 | /* Is this a line end? If yes, we're also done, after making |
13475 | sure that a non-default face is extended up to the right | |
13476 | margin of the window. */ | |
13477 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 13478 | { |
5f5c8ee5 GM |
13479 | int used_before = row->used[TEXT_AREA]; |
13480 | ||
e74fb0f7 GM |
13481 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
13482 | ||
5f5c8ee5 GM |
13483 | /* Add a space at the end of the line that is used to |
13484 | display the cursor there. */ | |
13485 | append_space (it, 0); | |
2311178e | 13486 | |
5f5c8ee5 GM |
13487 | /* Extend the face to the end of the line. */ |
13488 | extend_face_to_end_of_line (it); | |
13489 | ||
13490 | /* Make sure we have the position. */ | |
13491 | if (used_before == 0) | |
13492 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
2311178e | 13493 | |
5f5c8ee5 | 13494 | /* Consume the line end. This skips over invisible lines. */ |
cafafe0b | 13495 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13496 | it->continuation_lines_width = 0; |
13497 | break; | |
1c9241f5 | 13498 | } |
a2889657 | 13499 | |
2311178e | 13500 | /* Proceed with next display element. Note that this skips |
5f5c8ee5 | 13501 | over lines invisible because of selective display. */ |
cafafe0b | 13502 | set_iterator_to_next (it, 1); |
b1d1124b | 13503 | |
5f5c8ee5 GM |
13504 | /* If we truncate lines, we are done when the last displayed |
13505 | glyphs reach past the right margin of the window. */ | |
13506 | if (it->truncate_lines_p | |
13507 | && (FRAME_WINDOW_P (it->f) | |
13508 | ? (it->current_x >= it->last_visible_x) | |
13509 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 13510 | { |
5f5c8ee5 GM |
13511 | /* Maybe add truncation glyphs. */ |
13512 | if (!FRAME_WINDOW_P (it->f)) | |
13513 | { | |
a98b5ed9 | 13514 | int i, n; |
2311178e | 13515 | |
a98b5ed9 GM |
13516 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
13517 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
13518 | break; | |
13519 | ||
13520 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
13521 | { | |
13522 | row->used[TEXT_AREA] = i; | |
13523 | produce_special_glyphs (it, IT_TRUNCATION); | |
13524 | } | |
5f5c8ee5 | 13525 | } |
2311178e | 13526 | |
5f5c8ee5 GM |
13527 | row->truncated_on_right_p = 1; |
13528 | it->continuation_lines_width = 0; | |
312246d1 | 13529 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
13530 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
13531 | it->hpos = hpos_before; | |
13532 | it->current_x = x_before; | |
13533 | break; | |
75d13c64 | 13534 | } |
a2889657 | 13535 | } |
a2889657 | 13536 | |
5f5c8ee5 GM |
13537 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
13538 | at the left window margin. */ | |
13539 | if (it->first_visible_x | |
13540 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
13541 | { | |
13542 | if (!FRAME_WINDOW_P (it->f)) | |
13543 | insert_left_trunc_glyphs (it); | |
13544 | row->truncated_on_left_p = 1; | |
13545 | } | |
a2889657 | 13546 | |
5f5c8ee5 GM |
13547 | /* If the start of this line is the overlay arrow-position, then |
13548 | mark this glyph row as the one containing the overlay arrow. | |
13549 | This is clearly a mess with variable size fonts. It would be | |
13550 | better to let it be displayed like cursors under X. */ | |
e24c997d | 13551 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 13552 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
13553 | && (MATRIX_ROW_START_CHARPOS (row) |
13554 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 13555 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
13556 | && ! overlay_arrow_seen) |
13557 | { | |
b46952ae | 13558 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
5f5c8ee5 | 13559 | if (!FRAME_WINDOW_P (it->f)) |
c4628384 | 13560 | { |
5f5c8ee5 GM |
13561 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
13562 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
13563 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
13564 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
13565 | struct glyph *p2, *end; | |
13566 | ||
13567 | /* Copy the arrow glyphs. */ | |
13568 | while (glyph < arrow_end) | |
13569 | *p++ = *glyph++; | |
13570 | ||
13571 | /* Throw away padding glyphs. */ | |
13572 | p2 = p; | |
13573 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
13574 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
13575 | ++p2; | |
13576 | if (p2 > p) | |
212e4f87 | 13577 | { |
5f5c8ee5 GM |
13578 | while (p2 < end) |
13579 | *p++ = *p2++; | |
13580 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 13581 | } |
c4628384 | 13582 | } |
2311178e | 13583 | |
a2889657 | 13584 | overlay_arrow_seen = 1; |
5f5c8ee5 | 13585 | row->overlay_arrow_p = 1; |
a2889657 JB |
13586 | } |
13587 | ||
5f5c8ee5 GM |
13588 | /* Compute pixel dimensions of this line. */ |
13589 | compute_line_metrics (it); | |
13590 | ||
13591 | /* Remember the position at which this line ends. */ | |
13592 | row->end = it->current; | |
13593 | ||
173cbca8 | 13594 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
13595 | if (it->w->cursor.vpos < 0 |
13596 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
13597 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
13598 | && cursor_row_p (it->w, row)) | |
13599 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
13600 | |
13601 | /* Highlight trailing whitespace. */ | |
8f897821 | 13602 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
13603 | highlight_trailing_whitespace (it->f, it->glyph_row); |
13604 | ||
13605 | /* Prepare for the next line. This line starts horizontally at (X | |
13606 | HPOS) = (0 0). Vertical positions are incremented. As a | |
13607 | convenience for the caller, IT->glyph_row is set to the next | |
13608 | row to be used. */ | |
13609 | it->current_x = it->hpos = 0; | |
13610 | it->current_y += row->height; | |
13611 | ++it->vpos; | |
13612 | ++it->glyph_row; | |
13613 | return row->displays_text_p; | |
a2889657 | 13614 | } |
5f5c8ee5 GM |
13615 | |
13616 | ||
a2889657 | 13617 | \f |
5f5c8ee5 GM |
13618 | /*********************************************************************** |
13619 | Menu Bar | |
13620 | ***********************************************************************/ | |
13621 | ||
13622 | /* Redisplay the menu bar in the frame for window W. | |
13623 | ||
13624 | The menu bar of X frames that don't have X toolkit support is | |
13625 | displayed in a special window W->frame->menu_bar_window. | |
2311178e | 13626 | |
5f5c8ee5 GM |
13627 | The menu bar of terminal frames is treated specially as far as |
13628 | glyph matrices are concerned. Menu bar lines are not part of | |
13629 | windows, so the update is done directly on the frame matrix rows | |
13630 | for the menu bar. */ | |
7ce2c095 RS |
13631 | |
13632 | static void | |
13633 | display_menu_bar (w) | |
13634 | struct window *w; | |
13635 | { | |
5f5c8ee5 GM |
13636 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
13637 | struct it it; | |
13638 | Lisp_Object items; | |
8351baf2 | 13639 | int i; |
7ce2c095 | 13640 | |
5f5c8ee5 | 13641 | /* Don't do all this for graphical frames. */ |
dc937613 | 13642 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
13643 | if (!NILP (Vwindow_system)) |
13644 | return; | |
dc937613 | 13645 | #endif |
488dd4c4 | 13646 | #if defined (USE_X_TOOLKIT) || defined (USE_GTK) |
d3413a53 | 13647 | if (FRAME_X_P (f)) |
7ce2c095 | 13648 | return; |
5f5c8ee5 | 13649 | #endif |
e0f712ba | 13650 | #ifdef MAC_OS |
1a578e9b AC |
13651 | if (FRAME_MAC_P (f)) |
13652 | return; | |
13653 | #endif | |
5f5c8ee5 GM |
13654 | |
13655 | #ifdef USE_X_TOOLKIT | |
13656 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 13657 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
13658 | it.first_visible_x = 0; |
13659 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13660 | #else /* not USE_X_TOOLKIT */ | |
13661 | if (FRAME_WINDOW_P (f)) | |
13662 | { | |
13663 | /* Menu bar lines are displayed in the desired matrix of the | |
13664 | dummy window menu_bar_window. */ | |
13665 | struct window *menu_w; | |
13666 | xassert (WINDOWP (f->menu_bar_window)); | |
13667 | menu_w = XWINDOW (f->menu_bar_window); | |
13668 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 13669 | MENU_FACE_ID); |
5f5c8ee5 GM |
13670 | it.first_visible_x = 0; |
13671 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13672 | } | |
13673 | else | |
13674 | { | |
13675 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
13676 | pixel x/y. */ | |
13677 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 13678 | MENU_FACE_ID); |
5f5c8ee5 GM |
13679 | it.first_visible_x = 0; |
13680 | it.last_visible_x = FRAME_WIDTH (f); | |
13681 | } | |
13682 | #endif /* not USE_X_TOOLKIT */ | |
13683 | ||
1862a24e MB |
13684 | if (! mode_line_inverse_video) |
13685 | /* Force the menu-bar to be displayed in the default face. */ | |
13686 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13687 | ||
5f5c8ee5 GM |
13688 | /* Clear all rows of the menu bar. */ |
13689 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
13690 | { | |
13691 | struct glyph_row *row = it.glyph_row + i; | |
13692 | clear_glyph_row (row); | |
13693 | row->enabled_p = 1; | |
13694 | row->full_width_p = 1; | |
13695 | } | |
7ce2c095 | 13696 | |
5f5c8ee5 GM |
13697 | /* Display all items of the menu bar. */ |
13698 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 13699 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 13700 | { |
5f5c8ee5 GM |
13701 | Lisp_Object string; |
13702 | ||
13703 | /* Stop at nil string. */ | |
a61b7058 | 13704 | string = AREF (items, i + 1); |
8351baf2 RS |
13705 | if (NILP (string)) |
13706 | break; | |
2d66ad19 | 13707 | |
5f5c8ee5 | 13708 | /* Remember where item was displayed. */ |
a61b7058 | 13709 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 13710 | |
5f5c8ee5 GM |
13711 | /* Display the item, pad with one space. */ |
13712 | if (it.current_x < it.last_visible_x) | |
13713 | display_string (NULL, string, Qnil, 0, 0, &it, | |
2051c264 | 13714 | SCHARS (string) + 1, 0, 0, -1); |
7ce2c095 RS |
13715 | } |
13716 | ||
2d66ad19 | 13717 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
13718 | if (it.current_x < it.last_visible_x) |
13719 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 13720 | |
5f5c8ee5 GM |
13721 | /* Compute the total height of the lines. */ |
13722 | compute_line_metrics (&it); | |
7ce2c095 | 13723 | } |
5f5c8ee5 GM |
13724 | |
13725 | ||
7ce2c095 | 13726 | \f |
5f5c8ee5 GM |
13727 | /*********************************************************************** |
13728 | Mode Line | |
13729 | ***********************************************************************/ | |
13730 | ||
715e84c9 GM |
13731 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
13732 | FORCE is non-zero, redisplay mode lines unconditionally. | |
13733 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
13734 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 13735 | |
715e84c9 GM |
13736 | static int |
13737 | redisplay_mode_lines (window, force) | |
13738 | Lisp_Object window; | |
13739 | int force; | |
13740 | { | |
13741 | int nwindows = 0; | |
2311178e | 13742 | |
715e84c9 GM |
13743 | while (!NILP (window)) |
13744 | { | |
13745 | struct window *w = XWINDOW (window); | |
2311178e | 13746 | |
715e84c9 GM |
13747 | if (WINDOWP (w->hchild)) |
13748 | nwindows += redisplay_mode_lines (w->hchild, force); | |
13749 | else if (WINDOWP (w->vchild)) | |
13750 | nwindows += redisplay_mode_lines (w->vchild, force); | |
13751 | else if (force | |
13752 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
13753 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
13754 | { | |
715e84c9 GM |
13755 | struct text_pos lpoint; |
13756 | struct buffer *old = current_buffer; | |
13757 | ||
13758 | /* Set the window's buffer for the mode line display. */ | |
13759 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
13760 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
2311178e | 13761 | |
715e84c9 GM |
13762 | /* Point refers normally to the selected window. For any |
13763 | other window, set up appropriate value. */ | |
13764 | if (!EQ (window, selected_window)) | |
13765 | { | |
13766 | struct text_pos pt; | |
2311178e | 13767 | |
715e84c9 GM |
13768 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); |
13769 | if (CHARPOS (pt) < BEGV) | |
13770 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
13771 | else if (CHARPOS (pt) > (ZV - 1)) | |
13772 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
13773 | else | |
13774 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
13775 | } | |
13776 | ||
715e84c9 GM |
13777 | /* Display mode lines. */ |
13778 | clear_glyph_matrix (w->desired_matrix); | |
13779 | if (display_mode_lines (w)) | |
13780 | { | |
13781 | ++nwindows; | |
13782 | w->must_be_updated_p = 1; | |
13783 | } | |
13784 | ||
13785 | /* Restore old settings. */ | |
715e84c9 GM |
13786 | set_buffer_internal_1 (old); |
13787 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
13788 | } | |
13789 | ||
13790 | window = w->next; | |
13791 | } | |
13792 | ||
13793 | return nwindows; | |
13794 | } | |
13795 | ||
13796 | ||
13797 | /* Display the mode and/or top line of window W. Value is the number | |
13798 | of mode lines displayed. */ | |
13799 | ||
13800 | static int | |
5f5c8ee5 | 13801 | display_mode_lines (w) |
a2889657 JB |
13802 | struct window *w; |
13803 | { | |
edd1e654 | 13804 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 13805 | int n = 0; |
edd1e654 GM |
13806 | |
13807 | old_selected_frame = selected_frame; | |
13808 | selected_frame = w->frame; | |
13809 | old_selected_window = selected_window; | |
13810 | XSETWINDOW (selected_window, w); | |
2311178e | 13811 | |
5f5c8ee5 | 13812 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 13813 | line_number_displayed = 0; |
155ef550 | 13814 | w->column_number_displayed = Qnil; |
aa6d10fa | 13815 | |
5f5c8ee5 | 13816 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 | 13817 | { |
c96e83bf | 13818 | struct window *sel_w = XWINDOW (old_selected_window); |
f87c0a98 | 13819 | |
96d2320f | 13820 | /* Select mode line face based on the real selected window. */ |
c96e83bf | 13821 | display_mode_line (w, CURRENT_MODE_LINE_FACE_ID_3 (sel_w, sel_w, w), |
715e84c9 GM |
13822 | current_buffer->mode_line_format); |
13823 | ++n; | |
13824 | } | |
2311178e | 13825 | |
045dee35 | 13826 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
13827 | { |
13828 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
13829 | current_buffer->header_line_format); | |
13830 | ++n; | |
13831 | } | |
13832 | ||
edd1e654 GM |
13833 | selected_frame = old_selected_frame; |
13834 | selected_window = old_selected_window; | |
715e84c9 | 13835 | return n; |
5f5c8ee5 | 13836 | } |
03b294dc | 13837 | |
03b294dc | 13838 | |
5f5c8ee5 | 13839 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 13840 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
13841 | FORMAT is the mode line format to display. Value is the pixel |
13842 | height of the mode line displayed. */ | |
03b294dc | 13843 | |
04612a64 | 13844 | static int |
5f5c8ee5 GM |
13845 | display_mode_line (w, face_id, format) |
13846 | struct window *w; | |
13847 | enum face_id face_id; | |
13848 | Lisp_Object format; | |
13849 | { | |
13850 | struct it it; | |
13851 | struct face *face; | |
03b294dc | 13852 | |
5f5c8ee5 GM |
13853 | init_iterator (&it, w, -1, -1, NULL, face_id); |
13854 | prepare_desired_row (it.glyph_row); | |
13855 | ||
1862a24e MB |
13856 | if (! mode_line_inverse_video) |
13857 | /* Force the mode-line to be displayed in the default face. */ | |
13858 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13859 | ||
5f5c8ee5 GM |
13860 | /* Temporarily make frame's keyboard the current kboard so that |
13861 | kboard-local variables in the mode_line_format will get the right | |
13862 | values. */ | |
13863 | push_frame_kboard (it.f); | |
c53a1624 | 13864 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); |
5f5c8ee5 | 13865 | pop_frame_kboard (); |
a2889657 | 13866 | |
5f5c8ee5 GM |
13867 | /* Fill up with spaces. */ |
13868 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
2311178e | 13869 | |
5f5c8ee5 GM |
13870 | compute_line_metrics (&it); |
13871 | it.glyph_row->full_width_p = 1; | |
13872 | it.glyph_row->mode_line_p = 1; | |
5f5c8ee5 GM |
13873 | it.glyph_row->continued_p = 0; |
13874 | it.glyph_row->truncated_on_left_p = 0; | |
13875 | it.glyph_row->truncated_on_right_p = 0; | |
13876 | ||
13877 | /* Make a 3D mode-line have a shadow at its right end. */ | |
13878 | face = FACE_FROM_ID (it.f, face_id); | |
13879 | extend_face_to_end_of_line (&it); | |
13880 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 13881 | { |
5f5c8ee5 GM |
13882 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
13883 | + it.glyph_row->used[TEXT_AREA] - 1); | |
13884 | last->right_box_line_p = 1; | |
d7eb09a0 | 13885 | } |
04612a64 GM |
13886 | |
13887 | return it.glyph_row->height; | |
a2889657 JB |
13888 | } |
13889 | ||
0fcf414f RS |
13890 | /* Alist that caches the results of :propertize. |
13891 | Each element is (PROPERTIZED-STRING . PROPERTY-LIST). */ | |
13892 | Lisp_Object mode_line_proptrans_alist; | |
a2889657 | 13893 | |
fec8f23e KS |
13894 | /* List of strings making up the mode-line. */ |
13895 | Lisp_Object mode_line_string_list; | |
13896 | ||
13897 | /* Base face property when building propertized mode line string. */ | |
13898 | static Lisp_Object mode_line_string_face; | |
13899 | static Lisp_Object mode_line_string_face_prop; | |
13900 | ||
13901 | ||
5f5c8ee5 GM |
13902 | /* Contribute ELT to the mode line for window IT->w. How it |
13903 | translates into text depends on its data type. | |
a2889657 | 13904 | |
5f5c8ee5 | 13905 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
13906 | |
13907 | DEPTH is the depth in recursion. It is used to prevent | |
13908 | infinite recursion here. | |
13909 | ||
5f5c8ee5 GM |
13910 | FIELD_WIDTH is the number of characters the display of ELT should |
13911 | occupy in the mode line, and PRECISION is the maximum number of | |
13912 | characters to display from ELT's representation. See | |
b8523839 | 13913 | display_string for details. |
a2889657 | 13914 | |
c53a1624 RS |
13915 | Returns the hpos of the end of the text generated by ELT. |
13916 | ||
13917 | PROPS is a property list to add to any string we encounter. | |
13918 | ||
7d0393cf | 13919 | If RISKY is nonzero, remove (disregard) any properties in any string |
93da8435 SM |
13920 | we encounter, and ignore :eval and :propertize. |
13921 | ||
13922 | If the global variable `frame_title_ptr' is non-NULL, then the output | |
13923 | is passed to `store_frame_title' instead of `display_string'. */ | |
a2889657 JB |
13924 | |
13925 | static int | |
c53a1624 | 13926 | display_mode_element (it, depth, field_width, precision, elt, props, risky) |
5f5c8ee5 | 13927 | struct it *it; |
a2889657 | 13928 | int depth; |
5f5c8ee5 | 13929 | int field_width, precision; |
0fcf414f | 13930 | Lisp_Object elt, props; |
c53a1624 | 13931 | int risky; |
a2889657 | 13932 | { |
5f5c8ee5 | 13933 | int n = 0, field, prec; |
0fcf414f | 13934 | int literal = 0; |
5f5c8ee5 | 13935 | |
a2889657 JB |
13936 | tail_recurse: |
13937 | if (depth > 10) | |
13938 | goto invalid; | |
13939 | ||
13940 | depth++; | |
13941 | ||
0220c518 | 13942 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
13943 | { |
13944 | case Lisp_String: | |
13945 | { | |
13946 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 | 13947 | unsigned char c; |
50f80c2f | 13948 | const unsigned char *this, *lisp_string; |
5f5c8ee5 | 13949 | |
c53a1624 | 13950 | if (!NILP (props) || risky) |
0fcf414f RS |
13951 | { |
13952 | Lisp_Object oprops, aelt; | |
13953 | oprops = Ftext_properties_at (make_number (0), elt); | |
c53a1624 RS |
13954 | |
13955 | if (NILP (Fequal (props, oprops)) || risky) | |
0fcf414f | 13956 | { |
ae02e06a RS |
13957 | /* If the starting string has properties, |
13958 | merge the specified ones onto the existing ones. */ | |
c53a1624 | 13959 | if (! NILP (oprops) && !risky) |
ae02e06a RS |
13960 | { |
13961 | Lisp_Object tem; | |
13962 | ||
13963 | oprops = Fcopy_sequence (oprops); | |
13964 | tem = props; | |
13965 | while (CONSP (tem)) | |
13966 | { | |
13967 | oprops = Fplist_put (oprops, XCAR (tem), | |
13968 | XCAR (XCDR (tem))); | |
13969 | tem = XCDR (XCDR (tem)); | |
13970 | } | |
13971 | props = oprops; | |
13972 | } | |
13973 | ||
0fcf414f RS |
13974 | aelt = Fassoc (elt, mode_line_proptrans_alist); |
13975 | if (! NILP (aelt) && !NILP (Fequal (props, XCDR (aelt)))) | |
adb63af1 RS |
13976 | { |
13977 | mode_line_proptrans_alist | |
13978 | = Fcons (aelt, Fdelq (aelt, mode_line_proptrans_alist)); | |
13979 | elt = XCAR (aelt); | |
13980 | } | |
0fcf414f RS |
13981 | else |
13982 | { | |
adb63af1 RS |
13983 | Lisp_Object tem; |
13984 | ||
0fcf414f | 13985 | elt = Fcopy_sequence (elt); |
dc3b2c8b SM |
13986 | Fset_text_properties (make_number (0), Flength (elt), |
13987 | props, elt); | |
adb63af1 | 13988 | /* Add this item to mode_line_proptrans_alist. */ |
0fcf414f RS |
13989 | mode_line_proptrans_alist |
13990 | = Fcons (Fcons (elt, props), | |
13991 | mode_line_proptrans_alist); | |
adb63af1 RS |
13992 | /* Truncate mode_line_proptrans_alist |
13993 | to at most 50 elements. */ | |
13994 | tem = Fnthcdr (make_number (50), | |
13995 | mode_line_proptrans_alist); | |
13996 | if (! NILP (tem)) | |
13997 | XSETCDR (tem, Qnil); | |
0fcf414f RS |
13998 | } |
13999 | } | |
14000 | } | |
14001 | ||
2051c264 | 14002 | this = SDATA (elt); |
ae02e06a RS |
14003 | lisp_string = this; |
14004 | ||
0fcf414f RS |
14005 | if (literal) |
14006 | { | |
14007 | prec = precision - n; | |
14008 | if (frame_title_ptr) | |
2051c264 | 14009 | n += store_frame_title (SDATA (elt), -1, prec); |
fec8f23e KS |
14010 | else if (!NILP (mode_line_string_list)) |
14011 | n += store_mode_line_string (NULL, elt, 1, 0, prec, Qnil); | |
0fcf414f RS |
14012 | else |
14013 | n += display_string (NULL, elt, Qnil, 0, 0, it, | |
14014 | 0, prec, 0, STRING_MULTIBYTE (elt)); | |
14015 | ||
14016 | break; | |
14017 | } | |
14018 | ||
5f5c8ee5 GM |
14019 | while ((precision <= 0 || n < precision) |
14020 | && *this | |
14021 | && (frame_title_ptr | |
fec8f23e | 14022 | || !NILP (mode_line_string_list) |
5f5c8ee5 | 14023 | || it->current_x < it->last_visible_x)) |
a2889657 | 14024 | { |
50f80c2f | 14025 | const unsigned char *last = this; |
5f5c8ee5 GM |
14026 | |
14027 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
14028 | while ((c = *this++) != '\0' && c != '%') |
14029 | ; | |
2311178e | 14030 | |
a2889657 JB |
14031 | if (this - 1 != last) |
14032 | { | |
5f5c8ee5 GM |
14033 | /* Output to end of string or up to '%'. Field width |
14034 | is length of string. Don't output more than | |
14035 | PRECISION allows us. */ | |
d26b89b8 | 14036 | --this; |
eaaa65b0 GM |
14037 | |
14038 | prec = chars_in_text (last, this - last); | |
5f5c8ee5 GM |
14039 | if (precision > 0 && prec > precision - n) |
14040 | prec = precision - n; | |
2311178e | 14041 | |
d39b6696 | 14042 | if (frame_title_ptr) |
d26b89b8 | 14043 | n += store_frame_title (last, 0, prec); |
fec8f23e KS |
14044 | else if (!NILP (mode_line_string_list)) |
14045 | { | |
14046 | int bytepos = last - lisp_string; | |
14047 | int charpos = string_byte_to_char (elt, bytepos); | |
14048 | n += store_mode_line_string (NULL, | |
14049 | Fsubstring (elt, make_number (charpos), | |
14050 | make_number (charpos + prec)), | |
14051 | 0, 0, 0, Qnil); | |
14052 | } | |
d39b6696 | 14053 | else |
eaaa65b0 GM |
14054 | { |
14055 | int bytepos = last - lisp_string; | |
14056 | int charpos = string_byte_to_char (elt, bytepos); | |
14057 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
ca77144d GM |
14058 | it, 0, prec, 0, |
14059 | STRING_MULTIBYTE (elt)); | |
eaaa65b0 | 14060 | } |
a2889657 JB |
14061 | } |
14062 | else /* c == '%' */ | |
14063 | { | |
50f80c2f | 14064 | const unsigned char *percent_position = this; |
2311178e | 14065 | |
5f5c8ee5 GM |
14066 | /* Get the specified minimum width. Zero means |
14067 | don't pad. */ | |
14068 | field = 0; | |
a2889657 | 14069 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 14070 | field = field * 10 + c - '0'; |
a2889657 | 14071 | |
5f5c8ee5 GM |
14072 | /* Don't pad beyond the total padding allowed. */ |
14073 | if (field_width - n > 0 && field > field_width - n) | |
14074 | field = field_width - n; | |
a2889657 | 14075 | |
5f5c8ee5 GM |
14076 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
14077 | prec = precision - n; | |
2311178e | 14078 | |
a2889657 | 14079 | if (c == 'M') |
5f5c8ee5 | 14080 | n += display_mode_element (it, depth, field, prec, |
c53a1624 RS |
14081 | Vglobal_mode_string, props, |
14082 | risky); | |
a2889657 | 14083 | else if (c != 0) |
d39b6696 | 14084 | { |
72f62cb5 | 14085 | int multibyte; |
ae02e06a RS |
14086 | int bytepos, charpos; |
14087 | unsigned char *spec; | |
2311178e | 14088 | |
ae02e06a RS |
14089 | bytepos = percent_position - lisp_string; |
14090 | charpos = (STRING_MULTIBYTE (elt) | |
14091 | ? string_byte_to_char (elt, bytepos) | |
14092 | : bytepos); | |
14093 | ||
14094 | spec | |
72f62cb5 GM |
14095 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
14096 | ||
d39b6696 | 14097 | if (frame_title_ptr) |
5f5c8ee5 | 14098 | n += store_frame_title (spec, field, prec); |
fec8f23e KS |
14099 | else if (!NILP (mode_line_string_list)) |
14100 | { | |
14101 | int len = strlen (spec); | |
14102 | Lisp_Object tem = make_string (spec, len); | |
14103 | props = Ftext_properties_at (make_number (charpos), elt); | |
14104 | /* Should only keep face property in props */ | |
14105 | n += store_mode_line_string (NULL, tem, 0, field, prec, props); | |
14106 | } | |
d39b6696 | 14107 | else |
5f5c8ee5 | 14108 | { |
ae02e06a | 14109 | int nglyphs_before, nwritten; |
2311178e | 14110 | |
72f62cb5 | 14111 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; |
72f62cb5 GM |
14112 | nwritten = display_string (spec, Qnil, elt, |
14113 | charpos, 0, it, | |
14114 | field, prec, 0, | |
14115 | multibyte); | |
5f5c8ee5 GM |
14116 | |
14117 | /* Assign to the glyphs written above the | |
14118 | string where the `%x' came from, position | |
14119 | of the `%'. */ | |
14120 | if (nwritten > 0) | |
14121 | { | |
14122 | struct glyph *glyph | |
14123 | = (it->glyph_row->glyphs[TEXT_AREA] | |
14124 | + nglyphs_before); | |
14125 | int i; | |
14126 | ||
14127 | for (i = 0; i < nwritten; ++i) | |
14128 | { | |
14129 | glyph[i].object = elt; | |
14130 | glyph[i].charpos = charpos; | |
14131 | } | |
2311178e | 14132 | |
5f5c8ee5 GM |
14133 | n += nwritten; |
14134 | } | |
14135 | } | |
d39b6696 | 14136 | } |
b8523839 AS |
14137 | else /* c == 0 */ |
14138 | break; | |
a2889657 JB |
14139 | } |
14140 | } | |
14141 | } | |
14142 | break; | |
14143 | ||
14144 | case Lisp_Symbol: | |
14145 | /* A symbol: process the value of the symbol recursively | |
14146 | as if it appeared here directly. Avoid error if symbol void. | |
14147 | Special case: if value of symbol is a string, output the string | |
14148 | literally. */ | |
14149 | { | |
14150 | register Lisp_Object tem; | |
c53a1624 RS |
14151 | |
14152 | /* If the variable is not marked as risky to set | |
14153 | then its contents are risky to use. */ | |
14154 | if (NILP (Fget (elt, Qrisky_local_variable))) | |
14155 | risky = 1; | |
14156 | ||
a2889657 | 14157 | tem = Fboundp (elt); |
265a9e55 | 14158 | if (!NILP (tem)) |
a2889657 JB |
14159 | { |
14160 | tem = Fsymbol_value (elt); | |
14161 | /* If value is a string, output that string literally: | |
14162 | don't check for % within it. */ | |
e24c997d | 14163 | if (STRINGP (tem)) |
0fcf414f RS |
14164 | literal = 1; |
14165 | ||
14166 | if (!EQ (tem, elt)) | |
5f5c8ee5 GM |
14167 | { |
14168 | /* Give up right away for nil or t. */ | |
14169 | elt = tem; | |
14170 | goto tail_recurse; | |
14171 | } | |
a2889657 JB |
14172 | } |
14173 | } | |
14174 | break; | |
14175 | ||
14176 | case Lisp_Cons: | |
14177 | { | |
14178 | register Lisp_Object car, tem; | |
14179 | ||
0fcf414f RS |
14180 | /* A cons cell: five distinct cases. |
14181 | If first element is :eval or :propertize, do something special. | |
a2889657 JB |
14182 | If first element is a string or a cons, process all the elements |
14183 | and effectively concatenate them. | |
14184 | If first element is a negative number, truncate displaying cdr to | |
14185 | at most that many characters. If positive, pad (with spaces) | |
14186 | to at least that many characters. | |
14187 | If first element is a symbol, process the cadr or caddr recursively | |
14188 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 14189 | car = XCAR (elt); |
0fcf414f | 14190 | if (EQ (car, QCeval)) |
5f5c8ee5 GM |
14191 | { |
14192 | /* An element of the form (:eval FORM) means evaluate FORM | |
14193 | and use the result as mode line elements. */ | |
0fcf414f | 14194 | |
c53a1624 RS |
14195 | if (risky) |
14196 | break; | |
14197 | ||
0fcf414f RS |
14198 | if (CONSP (XCDR (elt))) |
14199 | { | |
14200 | Lisp_Object spec; | |
14201 | spec = safe_eval (XCAR (XCDR (elt))); | |
14202 | n += display_mode_element (it, depth, field_width - n, | |
c53a1624 RS |
14203 | precision - n, spec, props, |
14204 | risky); | |
0fcf414f RS |
14205 | } |
14206 | } | |
14207 | else if (EQ (car, QCpropertize)) | |
14208 | { | |
c53a1624 RS |
14209 | /* An element of the form (:propertize ELT PROPS...) |
14210 | means display ELT but applying properties PROPS. */ | |
14211 | ||
14212 | if (risky) | |
14213 | break; | |
14214 | ||
0fcf414f | 14215 | if (CONSP (XCDR (elt))) |
c53a1624 RS |
14216 | n += display_mode_element (it, depth, field_width - n, |
14217 | precision - n, XCAR (XCDR (elt)), | |
14218 | XCDR (XCDR (elt)), risky); | |
5f5c8ee5 GM |
14219 | } |
14220 | else if (SYMBOLP (car)) | |
a2889657 JB |
14221 | { |
14222 | tem = Fboundp (car); | |
9472f927 | 14223 | elt = XCDR (elt); |
e24c997d | 14224 | if (!CONSP (elt)) |
a2889657 JB |
14225 | goto invalid; |
14226 | /* elt is now the cdr, and we know it is a cons cell. | |
14227 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 14228 | if (!NILP (tem)) |
a2889657 JB |
14229 | { |
14230 | tem = Fsymbol_value (car); | |
265a9e55 | 14231 | if (!NILP (tem)) |
9472f927 GM |
14232 | { |
14233 | elt = XCAR (elt); | |
14234 | goto tail_recurse; | |
14235 | } | |
a2889657 JB |
14236 | } |
14237 | /* Symbol's value is nil (or symbol is unbound) | |
14238 | Get the cddr of the original list | |
14239 | and if possible find the caddr and use that. */ | |
9472f927 | 14240 | elt = XCDR (elt); |
265a9e55 | 14241 | if (NILP (elt)) |
a2889657 | 14242 | break; |
e24c997d | 14243 | else if (!CONSP (elt)) |
a2889657 | 14244 | goto invalid; |
9472f927 | 14245 | elt = XCAR (elt); |
a2889657 JB |
14246 | goto tail_recurse; |
14247 | } | |
e24c997d | 14248 | else if (INTEGERP (car)) |
a2889657 JB |
14249 | { |
14250 | register int lim = XINT (car); | |
9472f927 | 14251 | elt = XCDR (elt); |
a2889657 | 14252 | if (lim < 0) |
5f5c8ee5 GM |
14253 | { |
14254 | /* Negative int means reduce maximum width. */ | |
14255 | if (precision <= 0) | |
14256 | precision = -lim; | |
14257 | else | |
14258 | precision = min (precision, -lim); | |
14259 | } | |
a2889657 JB |
14260 | else if (lim > 0) |
14261 | { | |
14262 | /* Padding specified. Don't let it be more than | |
14263 | current maximum. */ | |
5f5c8ee5 GM |
14264 | if (precision > 0) |
14265 | lim = min (precision, lim); | |
14266 | ||
a2889657 JB |
14267 | /* If that's more padding than already wanted, queue it. |
14268 | But don't reduce padding already specified even if | |
14269 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 14270 | field_width = max (lim, field_width); |
a2889657 JB |
14271 | } |
14272 | goto tail_recurse; | |
14273 | } | |
e24c997d | 14274 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
14275 | { |
14276 | register int limit = 50; | |
5f5c8ee5 GM |
14277 | /* Limit is to protect against circular lists. */ |
14278 | while (CONSP (elt) | |
14279 | && --limit > 0 | |
14280 | && (precision <= 0 || n < precision)) | |
a2889657 | 14281 | { |
5f5c8ee5 | 14282 | n += display_mode_element (it, depth, field_width - n, |
c53a1624 RS |
14283 | precision - n, XCAR (elt), |
14284 | props, risky); | |
9472f927 | 14285 | elt = XCDR (elt); |
a2889657 JB |
14286 | } |
14287 | } | |
14288 | } | |
14289 | break; | |
14290 | ||
14291 | default: | |
14292 | invalid: | |
d39b6696 | 14293 | if (frame_title_ptr) |
5f5c8ee5 | 14294 | n += store_frame_title ("*invalid*", 0, precision - n); |
fec8f23e KS |
14295 | else if (!NILP (mode_line_string_list)) |
14296 | n += store_mode_line_string ("*invalid*", Qnil, 0, 0, precision - n, Qnil); | |
d39b6696 | 14297 | else |
5f5c8ee5 GM |
14298 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
14299 | precision - n, 0, 0); | |
14300 | return n; | |
a2889657 JB |
14301 | } |
14302 | ||
5f5c8ee5 GM |
14303 | /* Pad to FIELD_WIDTH. */ |
14304 | if (field_width > 0 && n < field_width) | |
14305 | { | |
14306 | if (frame_title_ptr) | |
14307 | n += store_frame_title ("", field_width - n, 0); | |
fec8f23e KS |
14308 | else if (!NILP (mode_line_string_list)) |
14309 | n += store_mode_line_string ("", Qnil, 0, field_width - n, 0, Qnil); | |
5f5c8ee5 GM |
14310 | else |
14311 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
14312 | 0, 0, 0); | |
14313 | } | |
2311178e | 14314 | |
5f5c8ee5 | 14315 | return n; |
a2889657 | 14316 | } |
5f5c8ee5 | 14317 | |
fec8f23e KS |
14318 | /* Store a mode-line string element in mode_line_string_list. |
14319 | ||
14320 | If STRING is non-null, display that C string. Otherwise, the Lisp | |
14321 | string LISP_STRING is displayed. | |
14322 | ||
14323 | FIELD_WIDTH is the minimum number of output glyphs to produce. | |
14324 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
14325 | with spaces. FIELD_WIDTH <= 0 means don't pad. | |
14326 | ||
14327 | PRECISION is the maximum number of characters to output from | |
14328 | STRING. PRECISION <= 0 means don't truncate the string. | |
14329 | ||
14330 | If COPY_STRING is non-zero, make a copy of LISP_STRING before adding | |
14331 | properties to the string. | |
14332 | ||
7d0393cf | 14333 | PROPS are the properties to add to the string. |
fec8f23e KS |
14334 | The mode_line_string_face face property is always added to the string. |
14335 | */ | |
14336 | ||
14337 | static int store_mode_line_string (string, lisp_string, copy_string, field_width, precision, props) | |
14338 | char *string; | |
14339 | Lisp_Object lisp_string; | |
14340 | int copy_string; | |
14341 | int field_width; | |
14342 | int precision; | |
14343 | Lisp_Object props; | |
14344 | { | |
14345 | int len; | |
14346 | int n = 0; | |
14347 | ||
14348 | if (string != NULL) | |
14349 | { | |
14350 | len = strlen (string); | |
14351 | if (precision > 0 && len > precision) | |
14352 | len = precision; | |
14353 | lisp_string = make_string (string, len); | |
14354 | if (NILP (props)) | |
14355 | props = mode_line_string_face_prop; | |
14356 | else if (!NILP (mode_line_string_face)) | |
14357 | { | |
14358 | Lisp_Object face = Fplist_get (props, Qface); | |
14359 | props = Fcopy_sequence (props); | |
14360 | if (NILP (face)) | |
14361 | face = mode_line_string_face; | |
14362 | else | |
14363 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
14364 | props = Fplist_put (props, Qface, face); | |
14365 | } | |
14366 | Fadd_text_properties (make_number (0), make_number (len), | |
14367 | props, lisp_string); | |
14368 | } | |
7d0393cf | 14369 | else |
fec8f23e | 14370 | { |
c8224325 | 14371 | len = XFASTINT (Flength (lisp_string)); |
fec8f23e KS |
14372 | if (precision > 0 && len > precision) |
14373 | { | |
14374 | len = precision; | |
14375 | lisp_string = Fsubstring (lisp_string, make_number (0), make_number (len)); | |
14376 | precision = -1; | |
14377 | } | |
14378 | if (!NILP (mode_line_string_face)) | |
14379 | { | |
14380 | Lisp_Object face; | |
14381 | if (NILP (props)) | |
14382 | props = Ftext_properties_at (make_number (0), lisp_string); | |
14383 | face = Fplist_get (props, Qface); | |
14384 | if (NILP (face)) | |
14385 | face = mode_line_string_face; | |
14386 | else | |
14387 | face = Fcons (face, Fcons (mode_line_string_face, Qnil)); | |
14388 | props = Fcons (Qface, Fcons (face, Qnil)); | |
14389 | if (copy_string) | |
14390 | lisp_string = Fcopy_sequence (lisp_string); | |
14391 | } | |
14392 | if (!NILP (props)) | |
14393 | Fadd_text_properties (make_number (0), make_number (len), | |
14394 | props, lisp_string); | |
14395 | } | |
14396 | ||
14397 | if (len > 0) | |
14398 | { | |
14399 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 14400 | n += len; |
fec8f23e KS |
14401 | } |
14402 | ||
14403 | if (field_width > len) | |
14404 | { | |
14405 | field_width -= len; | |
14406 | lisp_string = Fmake_string (make_number (field_width), make_number (' ')); | |
14407 | if (!NILP (props)) | |
14408 | Fadd_text_properties (make_number (0), make_number (field_width), | |
14409 | props, lisp_string); | |
14410 | mode_line_string_list = Fcons (lisp_string, mode_line_string_list); | |
7d0393cf | 14411 | n += field_width; |
fec8f23e KS |
14412 | } |
14413 | ||
14414 | return n; | |
14415 | } | |
14416 | ||
5f5c8ee5 | 14417 | |
8143e6ab | 14418 | DEFUN ("format-mode-line", Fformat_mode_line, Sformat_mode_line, |
fec8f23e | 14419 | 0, 3, 0, |
8143e6ab KS |
14420 | doc: /* Return the mode-line of selected window as a string. |
14421 | First optional arg FORMAT specifies a different format string (see | |
8b22c65a | 14422 | `mode-line-format' for details) to use. If FORMAT is t, return |
8143e6ab | 14423 | the buffer's header-line. Second optional arg WINDOW specifies a |
fec8f23e KS |
14424 | different window to use as the context for the formatting. |
14425 | If third optional arg NO-PROPS is non-nil, string is not propertized. */) | |
14426 | (format, window, no_props) | |
14427 | Lisp_Object format, window, no_props; | |
8143e6ab KS |
14428 | { |
14429 | struct it it; | |
8143e6ab KS |
14430 | int len; |
14431 | struct window *w; | |
14432 | struct buffer *old_buffer = NULL; | |
fec8f23e | 14433 | enum face_id face_id = DEFAULT_FACE_ID; |
8143e6ab KS |
14434 | |
14435 | if (NILP (window)) | |
14436 | window = selected_window; | |
14437 | CHECK_WINDOW (window); | |
14438 | w = XWINDOW (window); | |
14439 | CHECK_BUFFER (w->buffer); | |
14440 | ||
14441 | if (XBUFFER (w->buffer) != current_buffer) | |
14442 | { | |
14443 | old_buffer = current_buffer; | |
14444 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
14445 | } | |
14446 | ||
14447 | if (NILP (format) || EQ (format, Qt)) | |
fec8f23e KS |
14448 | { |
14449 | face_id = NILP (format) | |
14450 | ? CURRENT_MODE_LINE_FACE_ID (w) : | |
14451 | HEADER_LINE_FACE_ID; | |
14452 | format = NILP (format) | |
14453 | ? current_buffer->mode_line_format | |
14454 | : current_buffer->header_line_format; | |
14455 | } | |
14456 | ||
14457 | init_iterator (&it, w, -1, -1, NULL, face_id); | |
8143e6ab | 14458 | |
fec8f23e KS |
14459 | if (NILP (no_props)) |
14460 | { | |
14461 | mode_line_string_face = | |
14462 | (face_id == MODE_LINE_FACE_ID ? Qmode_line : | |
14463 | face_id == MODE_LINE_INACTIVE_FACE_ID ? Qmode_line_inactive : | |
14464 | face_id == HEADER_LINE_FACE_ID ? Qheader_line : Qnil); | |
8143e6ab | 14465 | |
fec8f23e KS |
14466 | mode_line_string_face_prop = |
14467 | NILP (mode_line_string_face) ? Qnil : | |
14468 | Fcons (Qface, Fcons (mode_line_string_face, Qnil)); | |
14469 | ||
14470 | /* We need a dummy last element in mode_line_string_list to | |
14471 | indicate we are building the propertized mode-line string. | |
14472 | Using mode_line_string_face_prop here GC protects it. */ | |
7d0393cf | 14473 | mode_line_string_list = |
fec8f23e KS |
14474 | Fcons (mode_line_string_face_prop, Qnil); |
14475 | frame_title_ptr = NULL; | |
14476 | } | |
14477 | else | |
14478 | { | |
14479 | mode_line_string_face_prop = Qnil; | |
14480 | mode_line_string_list = Qnil; | |
14481 | frame_title_ptr = frame_title_buf; | |
14482 | } | |
8143e6ab KS |
14483 | |
14484 | push_frame_kboard (it.f); | |
14485 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); | |
14486 | pop_frame_kboard (); | |
14487 | ||
14488 | if (old_buffer) | |
14489 | set_buffer_internal_1 (old_buffer); | |
14490 | ||
fec8f23e KS |
14491 | if (NILP (no_props)) |
14492 | { | |
14493 | Lisp_Object str; | |
14494 | mode_line_string_list = Fnreverse (mode_line_string_list); | |
14495 | str = Fmapconcat (intern ("identity"), XCDR (mode_line_string_list), | |
14496 | make_string ("", 0)); | |
14497 | mode_line_string_face_prop = Qnil; | |
14498 | mode_line_string_list = Qnil; | |
14499 | return str; | |
14500 | } | |
14501 | ||
8143e6ab KS |
14502 | len = frame_title_ptr - frame_title_buf; |
14503 | if (len > 0 && frame_title_ptr[-1] == '-') | |
14504 | { | |
14505 | /* Mode lines typically ends with numerous dashes; reduce to two dashes. */ | |
14506 | while (frame_title_ptr > frame_title_buf && *--frame_title_ptr == '-') | |
14507 | ; | |
14508 | frame_title_ptr += 3; /* restore last non-dash + two dashes */ | |
14509 | if (len > frame_title_ptr - frame_title_buf) | |
14510 | len = frame_title_ptr - frame_title_buf; | |
14511 | } | |
14512 | ||
14513 | frame_title_ptr = NULL; | |
14514 | return make_string (frame_title_buf, len); | |
14515 | } | |
14516 | ||
766525bc RS |
14517 | /* Write a null-terminated, right justified decimal representation of |
14518 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
14519 | ||
14520 | static void | |
14521 | pint2str (buf, width, d) | |
14522 | register char *buf; | |
14523 | register int width; | |
14524 | register int d; | |
14525 | { | |
14526 | register char *p = buf; | |
2311178e | 14527 | |
766525bc | 14528 | if (d <= 0) |
5f5c8ee5 | 14529 | *p++ = '0'; |
766525bc | 14530 | else |
5f5c8ee5 | 14531 | { |
766525bc | 14532 | while (d > 0) |
5f5c8ee5 | 14533 | { |
766525bc RS |
14534 | *p++ = d % 10 + '0'; |
14535 | d /= 10; | |
5f5c8ee5 GM |
14536 | } |
14537 | } | |
2311178e | 14538 | |
5f5c8ee5 GM |
14539 | for (width -= (int) (p - buf); width > 0; --width) |
14540 | *p++ = ' '; | |
766525bc RS |
14541 | *p-- = '\0'; |
14542 | while (p > buf) | |
5f5c8ee5 | 14543 | { |
766525bc RS |
14544 | d = *buf; |
14545 | *buf++ = *p; | |
14546 | *p-- = d; | |
5f5c8ee5 | 14547 | } |
766525bc RS |
14548 | } |
14549 | ||
5f5c8ee5 | 14550 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
14551 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
14552 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
14553 | ||
6693a99a | 14554 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 14555 | |
1c9241f5 KH |
14556 | static char * |
14557 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
14558 | Lisp_Object coding_system; | |
14559 | register char *buf; | |
14560 | int eol_flag; | |
14561 | { | |
1e1078d6 | 14562 | Lisp_Object val; |
916848d8 | 14563 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
50f80c2f | 14564 | const unsigned char *eol_str; |
302f2b38 EZ |
14565 | int eol_str_len; |
14566 | /* The EOL conversion we are using. */ | |
14567 | Lisp_Object eoltype; | |
1e1078d6 | 14568 | |
4a09dee0 | 14569 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 14570 | eoltype = Qnil; |
1c9241f5 | 14571 | |
4a09dee0 | 14572 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 14573 | { |
916848d8 RS |
14574 | if (multibyte) |
14575 | *buf++ = '-'; | |
21e989e3 | 14576 | if (eol_flag) |
302f2b38 | 14577 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 14578 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
14579 | } |
14580 | else | |
14581 | { | |
1e1078d6 RS |
14582 | Lisp_Object eolvalue; |
14583 | ||
14584 | eolvalue = Fget (coding_system, Qeol_type); | |
14585 | ||
916848d8 | 14586 | if (multibyte) |
a61b7058 | 14587 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 14588 | |
1c9241f5 KH |
14589 | if (eol_flag) |
14590 | { | |
1e1078d6 RS |
14591 | /* The EOL conversion that is normal on this system. */ |
14592 | ||
14593 | if (NILP (eolvalue)) /* Not yet decided. */ | |
14594 | eoltype = eol_mnemonic_undecided; | |
14595 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
14596 | eoltype = eol_mnemonic_undecided; | |
14597 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
14598 | eoltype = (XFASTINT (eolvalue) == 0 | |
14599 | ? eol_mnemonic_unix | |
14600 | : (XFASTINT (eolvalue) == 1 | |
14601 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
14602 | } |
14603 | } | |
2311178e | 14604 | |
302f2b38 EZ |
14605 | if (eol_flag) |
14606 | { | |
14607 | /* Mention the EOL conversion if it is not the usual one. */ | |
14608 | if (STRINGP (eoltype)) | |
14609 | { | |
2051c264 GM |
14610 | eol_str = SDATA (eoltype); |
14611 | eol_str_len = SBYTES (eoltype); | |
302f2b38 | 14612 | } |
f30b3499 KH |
14613 | else if (INTEGERP (eoltype) |
14614 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
14615 | { | |
50f80c2f KR |
14616 | unsigned char *tmp = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
14617 | eol_str_len = CHAR_STRING (XINT (eoltype), tmp); | |
14618 | eol_str = tmp; | |
f30b3499 | 14619 | } |
302f2b38 EZ |
14620 | else |
14621 | { | |
14622 | eol_str = invalid_eol_type; | |
14623 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 14624 | } |
f30b3499 | 14625 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 14626 | buf += eol_str_len; |
1c9241f5 | 14627 | } |
302f2b38 | 14628 | |
1c9241f5 KH |
14629 | return buf; |
14630 | } | |
14631 | ||
a2889657 | 14632 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
14633 | generated by character C. PRECISION >= 0 means don't return a |
14634 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 GM |
14635 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
14636 | if the result is multibyte text. */ | |
a2889657 | 14637 | |
11e82b76 JB |
14638 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
14639 | ||
a2889657 | 14640 | static char * |
72f62cb5 | 14641 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 14642 | struct window *w; |
68c45bf0 | 14643 | register int c; |
5f5c8ee5 | 14644 | int field_width, precision; |
72f62cb5 | 14645 | int *multibyte; |
a2889657 | 14646 | { |
0b67772d | 14647 | Lisp_Object obj; |
5f5c8ee5 GM |
14648 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
14649 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 14650 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 14651 | |
0b67772d | 14652 | obj = Qnil; |
72f62cb5 | 14653 | *multibyte = 0; |
a2889657 JB |
14654 | |
14655 | switch (c) | |
14656 | { | |
1af9f229 RS |
14657 | case '*': |
14658 | if (!NILP (b->read_only)) | |
14659 | return "%"; | |
14660 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14661 | return "*"; | |
14662 | return "-"; | |
14663 | ||
14664 | case '+': | |
14665 | /* This differs from %* only for a modified read-only buffer. */ | |
14666 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14667 | return "*"; | |
14668 | if (!NILP (b->read_only)) | |
14669 | return "%"; | |
14670 | return "-"; | |
14671 | ||
14672 | case '&': | |
14673 | /* This differs from %* in ignoring read-only-ness. */ | |
14674 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14675 | return "*"; | |
14676 | return "-"; | |
14677 | ||
14678 | case '%': | |
14679 | return "%"; | |
14680 | ||
2311178e | 14681 | case '[': |
1af9f229 RS |
14682 | { |
14683 | int i; | |
14684 | char *p; | |
14685 | ||
14686 | if (command_loop_level > 5) | |
14687 | return "[[[... "; | |
14688 | p = decode_mode_spec_buf; | |
14689 | for (i = 0; i < command_loop_level; i++) | |
14690 | *p++ = '['; | |
14691 | *p = 0; | |
14692 | return decode_mode_spec_buf; | |
14693 | } | |
14694 | ||
2311178e | 14695 | case ']': |
1af9f229 RS |
14696 | { |
14697 | int i; | |
14698 | char *p; | |
14699 | ||
14700 | if (command_loop_level > 5) | |
14701 | return " ...]]]"; | |
14702 | p = decode_mode_spec_buf; | |
14703 | for (i = 0; i < command_loop_level; i++) | |
14704 | *p++ = ']'; | |
14705 | *p = 0; | |
14706 | return decode_mode_spec_buf; | |
14707 | } | |
14708 | ||
14709 | case '-': | |
14710 | { | |
1af9f229 | 14711 | register int i; |
5f5c8ee5 GM |
14712 | |
14713 | /* Let lots_of_dashes be a string of infinite length. */ | |
fec8f23e KS |
14714 | if (!NILP (mode_line_string_list)) |
14715 | return "--"; | |
5f5c8ee5 GM |
14716 | if (field_width <= 0 |
14717 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 14718 | { |
5f5c8ee5 GM |
14719 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
14720 | decode_mode_spec_buf[i] = '-'; | |
14721 | decode_mode_spec_buf[i] = '\0'; | |
14722 | return decode_mode_spec_buf; | |
1af9f229 | 14723 | } |
5f5c8ee5 GM |
14724 | else |
14725 | return lots_of_dashes; | |
1af9f229 RS |
14726 | } |
14727 | ||
2311178e | 14728 | case 'b': |
d39b6696 | 14729 | obj = b->name; |
a2889657 JB |
14730 | break; |
14731 | ||
1af9f229 RS |
14732 | case 'c': |
14733 | { | |
2311178e | 14734 | int col = (int) current_column (); /* iftc */ |
ac90c44f | 14735 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 14736 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
14737 | return decode_mode_spec_buf; |
14738 | } | |
14739 | ||
14740 | case 'F': | |
14741 | /* %F displays the frame name. */ | |
5f5c8ee5 | 14742 | if (!NILP (f->title)) |
2051c264 | 14743 | return (char *) SDATA (f->title); |
fd8ff63d | 14744 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
2051c264 | 14745 | return (char *) SDATA (f->name); |
9c6da96f | 14746 | return "Emacs"; |
1af9f229 | 14747 | |
2311178e | 14748 | case 'f': |
d39b6696 | 14749 | obj = b->filename; |
a2889657 JB |
14750 | break; |
14751 | ||
aa6d10fa RS |
14752 | case 'l': |
14753 | { | |
12adba34 RS |
14754 | int startpos = XMARKER (w->start)->charpos; |
14755 | int startpos_byte = marker_byte_position (w->start); | |
14756 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 14757 | int nlines, junk; |
aa6d10fa RS |
14758 | int height = XFASTINT (w->height); |
14759 | ||
2311178e | 14760 | /* If we decided that this buffer isn't suitable for line numbers, |
aa6d10fa RS |
14761 | don't forget that too fast. */ |
14762 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 14763 | goto no_value; |
5300fd39 RS |
14764 | /* But do forget it, if the window shows a different buffer now. */ |
14765 | else if (BUFFERP (w->base_line_pos)) | |
14766 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
14767 | |
14768 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 14769 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 14770 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
14771 | { |
14772 | w->base_line_pos = Qnil; | |
14773 | w->base_line_number = Qnil; | |
766525bc | 14774 | goto no_value; |
aa6d10fa RS |
14775 | } |
14776 | ||
14777 | if (!NILP (w->base_line_number) | |
14778 | && !NILP (w->base_line_pos) | |
12adba34 | 14779 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
14780 | { |
14781 | line = XFASTINT (w->base_line_number); | |
14782 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 14783 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
14784 | } |
14785 | else | |
14786 | { | |
14787 | line = 1; | |
d39b6696 | 14788 | linepos = BUF_BEGV (b); |
12adba34 | 14789 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
14790 | } |
14791 | ||
14792 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
14793 | nlines = display_count_lines (linepos, linepos_byte, |
14794 | startpos_byte, | |
14795 | startpos, &junk); | |
aa6d10fa RS |
14796 | |
14797 | topline = nlines + line; | |
14798 | ||
14799 | /* Determine a new base line, if the old one is too close | |
14800 | or too far away, or if we did not have one. | |
14801 | "Too close" means it's plausible a scroll-down would | |
14802 | go back past it. */ | |
d39b6696 | 14803 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 14804 | { |
ac90c44f GM |
14805 | w->base_line_number = make_number (topline); |
14806 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
14807 | } |
14808 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 14809 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 14810 | { |
d39b6696 | 14811 | int limit = BUF_BEGV (b); |
12adba34 | 14812 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 14813 | int position; |
5d121aec | 14814 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
14815 | |
14816 | if (startpos - distance > limit) | |
12adba34 RS |
14817 | { |
14818 | limit = startpos - distance; | |
14819 | limit_byte = CHAR_TO_BYTE (limit); | |
14820 | } | |
aa6d10fa | 14821 | |
12adba34 RS |
14822 | nlines = display_count_lines (startpos, startpos_byte, |
14823 | limit_byte, | |
14824 | - (height * 2 + 30), | |
aa6d10fa | 14825 | &position); |
2311178e | 14826 | /* If we couldn't find the lines we wanted within |
5d121aec | 14827 | line_number_display_limit_width chars per line, |
aa6d10fa | 14828 | give up on line numbers for this window. */ |
12adba34 | 14829 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
14830 | { |
14831 | w->base_line_pos = w->buffer; | |
14832 | w->base_line_number = Qnil; | |
766525bc | 14833 | goto no_value; |
aa6d10fa RS |
14834 | } |
14835 | ||
ac90c44f GM |
14836 | w->base_line_number = make_number (topline - nlines); |
14837 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
14838 | } |
14839 | ||
14840 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
14841 | nlines = display_count_lines (startpos, startpos_byte, |
14842 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
14843 | |
14844 | /* Record that we did display the line number. */ | |
14845 | line_number_displayed = 1; | |
14846 | ||
14847 | /* Make the string to show. */ | |
5f5c8ee5 | 14848 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 14849 | return decode_mode_spec_buf; |
766525bc RS |
14850 | no_value: |
14851 | { | |
14852 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
14853 | int pad = field_width - 2; |
14854 | while (pad-- > 0) | |
14855 | *p++ = ' '; | |
14856 | *p++ = '?'; | |
b357b9d4 KR |
14857 | *p++ = '?'; |
14858 | *p = '\0'; | |
766525bc RS |
14859 | return decode_mode_spec_buf; |
14860 | } | |
aa6d10fa RS |
14861 | } |
14862 | break; | |
14863 | ||
2311178e | 14864 | case 'm': |
d39b6696 | 14865 | obj = b->mode_name; |
a2889657 JB |
14866 | break; |
14867 | ||
14868 | case 'n': | |
d39b6696 | 14869 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
14870 | return " Narrow"; |
14871 | break; | |
14872 | ||
a2889657 JB |
14873 | case 'p': |
14874 | { | |
14875 | int pos = marker_position (w->start); | |
d39b6696 | 14876 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 14877 | |
d39b6696 | 14878 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 14879 | { |
d39b6696 | 14880 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14881 | return "All"; |
14882 | else | |
14883 | return "Bottom"; | |
14884 | } | |
d39b6696 | 14885 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14886 | return "Top"; |
14887 | else | |
14888 | { | |
3c7d31b9 RS |
14889 | if (total > 1000000) |
14890 | /* Do it differently for a large value, to avoid overflow. */ | |
14891 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14892 | else | |
14893 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
14894 | /* We can't normally display a 3-digit number, |
14895 | so get us a 2-digit number that is close. */ | |
14896 | if (total == 100) | |
14897 | total = 99; | |
14898 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14899 | return decode_mode_spec_buf; | |
14900 | } | |
14901 | } | |
14902 | ||
8ffcb79f RS |
14903 | /* Display percentage of size above the bottom of the screen. */ |
14904 | case 'P': | |
14905 | { | |
14906 | int toppos = marker_position (w->start); | |
d39b6696 KH |
14907 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
14908 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 14909 | |
d39b6696 | 14910 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 14911 | { |
d39b6696 | 14912 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14913 | return "All"; |
14914 | else | |
14915 | return "Bottom"; | |
14916 | } | |
14917 | else | |
14918 | { | |
3c7d31b9 RS |
14919 | if (total > 1000000) |
14920 | /* Do it differently for a large value, to avoid overflow. */ | |
14921 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14922 | else | |
14923 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
14924 | /* We can't normally display a 3-digit number, |
14925 | so get us a 2-digit number that is close. */ | |
14926 | if (total == 100) | |
14927 | total = 99; | |
d39b6696 | 14928 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14929 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
14930 | else | |
14931 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14932 | return decode_mode_spec_buf; | |
14933 | } | |
14934 | } | |
14935 | ||
1af9f229 RS |
14936 | case 's': |
14937 | /* status of process */ | |
14938 | obj = Fget_buffer_process (w->buffer); | |
14939 | if (NILP (obj)) | |
14940 | return "no process"; | |
14941 | #ifdef subprocesses | |
14942 | obj = Fsymbol_name (Fprocess_status (obj)); | |
14943 | #endif | |
14944 | break; | |
d39b6696 | 14945 | |
1af9f229 RS |
14946 | case 't': /* indicate TEXT or BINARY */ |
14947 | #ifdef MODE_LINE_BINARY_TEXT | |
14948 | return MODE_LINE_BINARY_TEXT (b); | |
14949 | #else | |
14950 | return "T"; | |
14951 | #endif | |
1c9241f5 KH |
14952 | |
14953 | case 'z': | |
14954 | /* coding-system (not including end-of-line format) */ | |
14955 | case 'Z': | |
14956 | /* coding-system (including end-of-line type) */ | |
14957 | { | |
14958 | int eol_flag = (c == 'Z'); | |
539b4d41 | 14959 | char *p = decode_mode_spec_buf; |
1c9241f5 | 14960 | |
d30e754b | 14961 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 14962 | { |
11c52c4f RS |
14963 | /* No need to mention EOL here--the terminal never needs |
14964 | to do EOL conversion. */ | |
14965 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
14966 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 14967 | } |
f13c925f | 14968 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 14969 | p, eol_flag); |
f13c925f | 14970 | |
11c52c4f | 14971 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
14972 | #ifdef subprocesses |
14973 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
14974 | if (PROCESSP (obj)) | |
14975 | { | |
14976 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
14977 | p, eol_flag); | |
14978 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
14979 | p, eol_flag); | |
14980 | } | |
14981 | #endif /* subprocesses */ | |
11c52c4f | 14982 | #endif /* 0 */ |
1c9241f5 KH |
14983 | *p = 0; |
14984 | return decode_mode_spec_buf; | |
14985 | } | |
a2889657 | 14986 | } |
d39b6696 | 14987 | |
e24c997d | 14988 | if (STRINGP (obj)) |
72f62cb5 GM |
14989 | { |
14990 | *multibyte = STRING_MULTIBYTE (obj); | |
2051c264 | 14991 | return (char *) SDATA (obj); |
72f62cb5 | 14992 | } |
a2889657 JB |
14993 | else |
14994 | return ""; | |
14995 | } | |
5f5c8ee5 GM |
14996 | |
14997 | ||
12adba34 RS |
14998 | /* Count up to COUNT lines starting from START / START_BYTE. |
14999 | But don't go beyond LIMIT_BYTE. | |
15000 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 15001 | |
12adba34 | 15002 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
15003 | |
15004 | static int | |
12adba34 RS |
15005 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
15006 | int start, start_byte, limit_byte, count; | |
15007 | int *byte_pos_ptr; | |
59b49f63 | 15008 | { |
59b49f63 RS |
15009 | register unsigned char *cursor; |
15010 | unsigned char *base; | |
15011 | ||
15012 | register int ceiling; | |
15013 | register unsigned char *ceiling_addr; | |
12adba34 | 15014 | int orig_count = count; |
59b49f63 RS |
15015 | |
15016 | /* If we are not in selective display mode, | |
15017 | check only for newlines. */ | |
12adba34 RS |
15018 | int selective_display = (!NILP (current_buffer->selective_display) |
15019 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
15020 | |
15021 | if (count > 0) | |
12adba34 RS |
15022 | { |
15023 | while (start_byte < limit_byte) | |
15024 | { | |
15025 | ceiling = BUFFER_CEILING_OF (start_byte); | |
15026 | ceiling = min (limit_byte - 1, ceiling); | |
15027 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
15028 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
15029 | while (1) | |
15030 | { | |
15031 | if (selective_display) | |
15032 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
15033 | ; | |
15034 | else | |
15035 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
15036 | ; | |
15037 | ||
15038 | if (cursor != ceiling_addr) | |
15039 | { | |
15040 | if (--count == 0) | |
15041 | { | |
15042 | start_byte += cursor - base + 1; | |
15043 | *byte_pos_ptr = start_byte; | |
15044 | return orig_count; | |
15045 | } | |
15046 | else | |
15047 | if (++cursor == ceiling_addr) | |
15048 | break; | |
15049 | } | |
15050 | else | |
15051 | break; | |
15052 | } | |
15053 | start_byte += cursor - base; | |
15054 | } | |
15055 | } | |
59b49f63 RS |
15056 | else |
15057 | { | |
12adba34 RS |
15058 | while (start_byte > limit_byte) |
15059 | { | |
15060 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
15061 | ceiling = max (limit_byte, ceiling); | |
15062 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
15063 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
15064 | while (1) |
15065 | { | |
12adba34 RS |
15066 | if (selective_display) |
15067 | while (--cursor != ceiling_addr | |
15068 | && *cursor != '\n' && *cursor != 015) | |
15069 | ; | |
15070 | else | |
15071 | while (--cursor != ceiling_addr && *cursor != '\n') | |
15072 | ; | |
15073 | ||
59b49f63 RS |
15074 | if (cursor != ceiling_addr) |
15075 | { | |
15076 | if (++count == 0) | |
15077 | { | |
12adba34 RS |
15078 | start_byte += cursor - base + 1; |
15079 | *byte_pos_ptr = start_byte; | |
15080 | /* When scanning backwards, we should | |
15081 | not count the newline posterior to which we stop. */ | |
15082 | return - orig_count - 1; | |
59b49f63 RS |
15083 | } |
15084 | } | |
15085 | else | |
15086 | break; | |
15087 | } | |
12adba34 RS |
15088 | /* Here we add 1 to compensate for the last decrement |
15089 | of CURSOR, which took it past the valid range. */ | |
15090 | start_byte += cursor - base + 1; | |
59b49f63 RS |
15091 | } |
15092 | } | |
15093 | ||
12adba34 | 15094 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 15095 | |
12adba34 RS |
15096 | if (count < 0) |
15097 | return - orig_count + count; | |
15098 | return orig_count - count; | |
aa6d10fa | 15099 | |
12adba34 | 15100 | } |
a2889657 | 15101 | |
a2889657 | 15102 | |
5f5c8ee5 GM |
15103 | \f |
15104 | /*********************************************************************** | |
15105 | Displaying strings | |
15106 | ***********************************************************************/ | |
278feba9 | 15107 | |
5f5c8ee5 | 15108 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 15109 | |
5f5c8ee5 GM |
15110 | If STRING is non-null, display that C string. Otherwise, the Lisp |
15111 | string LISP_STRING is displayed. | |
a2889657 | 15112 | |
5f5c8ee5 GM |
15113 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
15114 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
15115 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 15116 | |
5f5c8ee5 GM |
15117 | Display the string in the environment given by IT, but use the |
15118 | standard display table, temporarily. | |
a3788d53 | 15119 | |
5f5c8ee5 GM |
15120 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
15121 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
15122 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
15123 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
2311178e | 15124 | |
5f5c8ee5 GM |
15125 | PRECISION is the maximum number of characters to output from |
15126 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 15127 | |
5f5c8ee5 | 15128 | This is roughly equivalent to printf format specifiers: |
a2889657 | 15129 | |
5f5c8ee5 GM |
15130 | FIELD_WIDTH PRECISION PRINTF |
15131 | ---------------------------------------- | |
15132 | -1 -1 %s | |
15133 | -1 10 %.10s | |
15134 | 10 -1 %10s | |
15135 | 20 10 %20.10s | |
a2889657 | 15136 | |
5f5c8ee5 GM |
15137 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
15138 | display them, and < 0 means obey the current buffer's value of | |
15139 | enable_multibyte_characters. | |
278feba9 | 15140 | |
5f5c8ee5 | 15141 | Value is the number of glyphs produced. */ |
b1d1124b | 15142 | |
5f5c8ee5 GM |
15143 | static int |
15144 | display_string (string, lisp_string, face_string, face_string_pos, | |
15145 | start, it, field_width, precision, max_x, multibyte) | |
15146 | unsigned char *string; | |
15147 | Lisp_Object lisp_string; | |
68c45bf0 PE |
15148 | Lisp_Object face_string; |
15149 | int face_string_pos; | |
5f5c8ee5 GM |
15150 | int start; |
15151 | struct it *it; | |
15152 | int field_width, precision, max_x; | |
15153 | int multibyte; | |
15154 | { | |
15155 | int hpos_at_start = it->hpos; | |
15156 | int saved_face_id = it->face_id; | |
15157 | struct glyph_row *row = it->glyph_row; | |
15158 | ||
15159 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 15160 | with index START. */ |
5f5c8ee5 GM |
15161 | reseat_to_string (it, string, lisp_string, start, |
15162 | precision, field_width, multibyte); | |
15163 | ||
15164 | /* If displaying STRING, set up the face of the iterator | |
15165 | from LISP_STRING, if that's given. */ | |
15166 | if (STRINGP (face_string)) | |
15167 | { | |
15168 | int endptr; | |
15169 | struct face *face; | |
2311178e | 15170 | |
5f5c8ee5 GM |
15171 | it->face_id |
15172 | = face_at_string_position (it->w, face_string, face_string_pos, | |
15173 | 0, it->region_beg_charpos, | |
15174 | it->region_end_charpos, | |
5de7c6f2 | 15175 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
15176 | face = FACE_FROM_ID (it->f, it->face_id); |
15177 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 15178 | } |
a2889657 | 15179 | |
5f5c8ee5 GM |
15180 | /* Set max_x to the maximum allowed X position. Don't let it go |
15181 | beyond the right edge of the window. */ | |
15182 | if (max_x <= 0) | |
15183 | max_x = it->last_visible_x; | |
15184 | else | |
15185 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 15186 | |
5f5c8ee5 GM |
15187 | /* Skip over display elements that are not visible. because IT->w is |
15188 | hscrolled. */ | |
15189 | if (it->current_x < it->first_visible_x) | |
15190 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
15191 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 15192 | |
5f5c8ee5 GM |
15193 | row->ascent = it->max_ascent; |
15194 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
15195 | row->phys_ascent = it->max_phys_ascent; |
15196 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 15197 | |
5f5c8ee5 GM |
15198 | /* This condition is for the case that we are called with current_x |
15199 | past last_visible_x. */ | |
15200 | while (it->current_x < max_x) | |
a2889657 | 15201 | { |
5f5c8ee5 | 15202 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 15203 | |
5f5c8ee5 GM |
15204 | /* Get the next display element. */ |
15205 | if (!get_next_display_element (it)) | |
90adcf20 | 15206 | break; |
1c9241f5 | 15207 | |
5f5c8ee5 GM |
15208 | /* Produce glyphs. */ |
15209 | x_before = it->current_x; | |
15210 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
15211 | PRODUCE_GLYPHS (it); | |
90adcf20 | 15212 | |
5f5c8ee5 GM |
15213 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
15214 | i = 0; | |
15215 | x = x_before; | |
15216 | while (i < nglyphs) | |
a2889657 | 15217 | { |
5f5c8ee5 | 15218 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
2311178e | 15219 | |
5f5c8ee5 GM |
15220 | if (!it->truncate_lines_p |
15221 | && x + glyph->pixel_width > max_x) | |
15222 | { | |
15223 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
15224 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
15225 | { | |
15226 | /* A wide character is unbreakable. */ | |
15227 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
15228 | it->current_x = x_before; | |
15229 | } | |
15230 | else | |
15231 | { | |
15232 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
15233 | it->current_x = x; | |
15234 | } | |
5f5c8ee5 GM |
15235 | break; |
15236 | } | |
15237 | else if (x + glyph->pixel_width > it->first_visible_x) | |
15238 | { | |
15239 | /* Glyph is at least partially visible. */ | |
15240 | ++it->hpos; | |
15241 | if (x < it->first_visible_x) | |
15242 | it->glyph_row->x = x - it->first_visible_x; | |
15243 | } | |
15244 | else | |
a2889657 | 15245 | { |
5f5c8ee5 GM |
15246 | /* Glyph is off the left margin of the display area. |
15247 | Should not happen. */ | |
15248 | abort (); | |
a2889657 | 15249 | } |
5f5c8ee5 GM |
15250 | |
15251 | row->ascent = max (row->ascent, it->max_ascent); | |
15252 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
15253 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
15254 | row->phys_height = max (row->phys_height, | |
15255 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
15256 | x += glyph->pixel_width; |
15257 | ++i; | |
a2889657 | 15258 | } |
5f5c8ee5 GM |
15259 | |
15260 | /* Stop if max_x reached. */ | |
15261 | if (i < nglyphs) | |
15262 | break; | |
15263 | ||
15264 | /* Stop at line ends. */ | |
15265 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 15266 | { |
5f5c8ee5 GM |
15267 | it->continuation_lines_width = 0; |
15268 | break; | |
a2889657 | 15269 | } |
1c9241f5 | 15270 | |
cafafe0b | 15271 | set_iterator_to_next (it, 1); |
a688bb24 | 15272 | |
5f5c8ee5 GM |
15273 | /* Stop if truncating at the right edge. */ |
15274 | if (it->truncate_lines_p | |
15275 | && it->current_x >= it->last_visible_x) | |
15276 | { | |
15277 | /* Add truncation mark, but don't do it if the line is | |
15278 | truncated at a padding space. */ | |
15279 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 15280 | { |
5f5c8ee5 | 15281 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
15282 | { |
15283 | int i, n; | |
15284 | ||
9299cb15 | 15285 | if (it->current_x > it->last_visible_x) |
37be86f2 | 15286 | { |
9299cb15 KH |
15287 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
15288 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
15289 | break; | |
15290 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
15291 | { | |
15292 | row->used[TEXT_AREA] = i; | |
15293 | produce_special_glyphs (it, IT_TRUNCATION); | |
15294 | } | |
37be86f2 | 15295 | } |
9299cb15 | 15296 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 15297 | } |
5f5c8ee5 | 15298 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 15299 | } |
5f5c8ee5 | 15300 | break; |
1c9241f5 | 15301 | } |
a2889657 JB |
15302 | } |
15303 | ||
5f5c8ee5 GM |
15304 | /* Maybe insert a truncation at the left. */ |
15305 | if (it->first_visible_x | |
15306 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 15307 | { |
5f5c8ee5 GM |
15308 | if (!FRAME_WINDOW_P (it->f)) |
15309 | insert_left_trunc_glyphs (it); | |
15310 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
15311 | } |
15312 | ||
5f5c8ee5 | 15313 | it->face_id = saved_face_id; |
2311178e | 15314 | |
5f5c8ee5 GM |
15315 | /* Value is number of columns displayed. */ |
15316 | return it->hpos - hpos_at_start; | |
15317 | } | |
a2889657 | 15318 | |
a2889657 | 15319 | |
a2889657 | 15320 | \f |
3b6b6db7 | 15321 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
15322 | appears as an element of LIST or as the car of an element of LIST. |
15323 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
15324 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
15325 | Otherwise return 0. This function cannot quit. | |
15326 | The return value is 2 if the text is invisible but with an ellipsis | |
15327 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
15328 | |
15329 | int | |
15330 | invisible_p (propval, list) | |
15331 | register Lisp_Object propval; | |
15332 | Lisp_Object list; | |
15333 | { | |
3b6b6db7 | 15334 | register Lisp_Object tail, proptail; |
2311178e | 15335 | |
3b6b6db7 SM |
15336 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
15337 | { | |
15338 | register Lisp_Object tem; | |
15339 | tem = XCAR (tail); | |
15340 | if (EQ (propval, tem)) | |
15341 | return 1; | |
15342 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
15343 | return NILP (XCDR (tem)) ? 1 : 2; | |
15344 | } | |
2311178e | 15345 | |
3b6b6db7 SM |
15346 | if (CONSP (propval)) |
15347 | { | |
15348 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
15349 | { | |
15350 | Lisp_Object propelt; | |
15351 | propelt = XCAR (proptail); | |
15352 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
15353 | { | |
15354 | register Lisp_Object tem; | |
15355 | tem = XCAR (tail); | |
15356 | if (EQ (propelt, tem)) | |
15357 | return 1; | |
15358 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
15359 | return NILP (XCDR (tem)) ? 1 : 2; | |
15360 | } | |
15361 | } | |
15362 | } | |
2311178e | 15363 | |
3b6b6db7 | 15364 | return 0; |
642eefc6 | 15365 | } |
5f5c8ee5 | 15366 | |
642eefc6 | 15367 | \f |
cfe03a41 KS |
15368 | /*********************************************************************** |
15369 | Cursor types | |
15370 | ***********************************************************************/ | |
15371 | ||
15372 | /* Value is the internal representation of the specified cursor type | |
15373 | ARG. If type is BAR_CURSOR, return in *WIDTH the specified width | |
15374 | of the bar cursor. */ | |
15375 | ||
15376 | enum text_cursor_kinds | |
15377 | get_specified_cursor_type (arg, width) | |
15378 | Lisp_Object arg; | |
15379 | int *width; | |
15380 | { | |
15381 | enum text_cursor_kinds type; | |
7d0393cf | 15382 | |
cfe03a41 KS |
15383 | if (NILP (arg)) |
15384 | return NO_CURSOR; | |
15385 | ||
15386 | if (EQ (arg, Qbox)) | |
15387 | return FILLED_BOX_CURSOR; | |
15388 | ||
15389 | if (EQ (arg, Qhollow)) | |
15390 | return HOLLOW_BOX_CURSOR; | |
15391 | ||
15392 | if (EQ (arg, Qbar)) | |
15393 | { | |
15394 | *width = 2; | |
15395 | return BAR_CURSOR; | |
15396 | } | |
15397 | ||
15398 | if (CONSP (arg) | |
15399 | && EQ (XCAR (arg), Qbar) | |
15400 | && INTEGERP (XCDR (arg)) | |
15401 | && XINT (XCDR (arg)) >= 0) | |
15402 | { | |
15403 | *width = XINT (XCDR (arg)); | |
15404 | return BAR_CURSOR; | |
15405 | } | |
15406 | ||
15407 | if (EQ (arg, Qhbar)) | |
15408 | { | |
15409 | *width = 2; | |
15410 | return HBAR_CURSOR; | |
15411 | } | |
15412 | ||
15413 | if (CONSP (arg) | |
15414 | && EQ (XCAR (arg), Qhbar) | |
15415 | && INTEGERP (XCDR (arg)) | |
15416 | && XINT (XCDR (arg)) >= 0) | |
15417 | { | |
15418 | *width = XINT (XCDR (arg)); | |
15419 | return HBAR_CURSOR; | |
15420 | } | |
15421 | ||
15422 | /* Treat anything unknown as "hollow box cursor". | |
15423 | It was bad to signal an error; people have trouble fixing | |
15424 | .Xdefaults with Emacs, when it has something bad in it. */ | |
15425 | type = HOLLOW_BOX_CURSOR; | |
15426 | ||
15427 | return type; | |
15428 | } | |
15429 | ||
15430 | /* Set the default cursor types for specified frame. */ | |
15431 | void | |
15432 | set_frame_cursor_types (f, arg) | |
15433 | struct frame *f; | |
15434 | Lisp_Object arg; | |
15435 | { | |
15436 | int width; | |
15437 | Lisp_Object tem; | |
15438 | ||
15439 | FRAME_DESIRED_CURSOR (f) = get_specified_cursor_type (arg, &width); | |
15440 | FRAME_CURSOR_WIDTH (f) = width; | |
15441 | ||
15442 | /* By default, set up the blink-off state depending on the on-state. */ | |
15443 | ||
15444 | tem = Fassoc (arg, Vblink_cursor_alist); | |
15445 | if (!NILP (tem)) | |
15446 | { | |
15447 | FRAME_BLINK_OFF_CURSOR (f) | |
15448 | = get_specified_cursor_type (XCDR (tem), &width); | |
15449 | FRAME_BLINK_OFF_CURSOR_WIDTH (f) = width; | |
15450 | } | |
15451 | else | |
15452 | FRAME_BLINK_OFF_CURSOR (f) = DEFAULT_CURSOR; | |
15453 | } | |
15454 | ||
15455 | ||
e9c99027 KS |
15456 | /* Return the cursor we want to be displayed in window W. Return |
15457 | width of bar/hbar cursor through WIDTH arg. Return with | |
15458 | ACTIVE_CURSOR arg set to 1 if cursor in window W is `active' | |
15459 | (i.e. if the `system caret' should track this cursor). | |
15460 | ||
15461 | In a mini-buffer window, we want the cursor only to appear if we | |
15462 | are reading input from this window. For the selected window, we | |
15463 | want the cursor type given by the frame parameter or buffer local | |
15464 | setting of cursor-type. If explicitly marked off, draw no cursor. | |
15465 | In all other cases, we want a hollow box cursor. */ | |
cfe03a41 KS |
15466 | |
15467 | enum text_cursor_kinds | |
e9c99027 | 15468 | get_window_cursor_type (w, width, active_cursor) |
cfe03a41 KS |
15469 | struct window *w; |
15470 | int *width; | |
e9c99027 | 15471 | int *active_cursor; |
cfe03a41 KS |
15472 | { |
15473 | struct frame *f = XFRAME (w->frame); | |
15474 | struct buffer *b = XBUFFER (w->buffer); | |
15475 | int cursor_type = DEFAULT_CURSOR; | |
15476 | Lisp_Object alt_cursor; | |
15477 | int non_selected = 0; | |
15478 | ||
e9c99027 KS |
15479 | *active_cursor = 1; |
15480 | ||
cfe03a41 KS |
15481 | /* Echo area */ |
15482 | if (cursor_in_echo_area | |
15483 | && FRAME_HAS_MINIBUF_P (f) | |
15484 | && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)) | |
15485 | { | |
15486 | if (w == XWINDOW (echo_area_window)) | |
15487 | { | |
15488 | *width = FRAME_CURSOR_WIDTH (f); | |
15489 | return FRAME_DESIRED_CURSOR (f); | |
15490 | } | |
15491 | ||
e9c99027 | 15492 | *active_cursor = 0; |
cfe03a41 KS |
15493 | non_selected = 1; |
15494 | } | |
15495 | ||
15496 | /* Nonselected window or nonselected frame. */ | |
97acc803 EZ |
15497 | else if (w != XWINDOW (f->selected_window) |
15498 | #ifdef HAVE_WINDOW_SYSTEM | |
15499 | || f != FRAME_X_DISPLAY_INFO (f)->x_highlight_frame | |
15500 | #endif | |
15501 | ) | |
cfe03a41 | 15502 | { |
e9c99027 KS |
15503 | *active_cursor = 0; |
15504 | ||
cfe03a41 KS |
15505 | if (MINI_WINDOW_P (w) && minibuf_level == 0) |
15506 | return NO_CURSOR; | |
15507 | ||
15508 | non_selected = 1; | |
15509 | } | |
15510 | ||
15511 | /* Never display a cursor in a window in which cursor-type is nil. */ | |
15512 | if (NILP (b->cursor_type)) | |
15513 | return NO_CURSOR; | |
15514 | ||
15515 | /* Use cursor-in-non-selected-windows for non-selected window or frame. */ | |
15516 | if (non_selected) | |
15517 | { | |
15518 | alt_cursor = Fbuffer_local_value (Qcursor_in_non_selected_windows, w->buffer); | |
15519 | return get_specified_cursor_type (alt_cursor, width); | |
15520 | } | |
15521 | ||
15522 | /* Get the normal cursor type for this window. */ | |
15523 | if (EQ (b->cursor_type, Qt)) | |
15524 | { | |
15525 | cursor_type = FRAME_DESIRED_CURSOR (f); | |
15526 | *width = FRAME_CURSOR_WIDTH (f); | |
15527 | } | |
15528 | else | |
15529 | cursor_type = get_specified_cursor_type (b->cursor_type, width); | |
15530 | ||
15531 | /* Use normal cursor if not blinked off. */ | |
15532 | if (!w->cursor_off_p) | |
15533 | return cursor_type; | |
15534 | ||
15535 | /* Cursor is blinked off, so determine how to "toggle" it. */ | |
15536 | ||
8420a5dd KS |
15537 | /* First look for an entry matching the buffer's cursor-type in blink-cursor-alist. */ |
15538 | if ((alt_cursor = Fassoc (b->cursor_type, Vblink_cursor_alist), !NILP (alt_cursor))) | |
cfe03a41 KS |
15539 | return get_specified_cursor_type (XCDR (alt_cursor), width); |
15540 | ||
15541 | /* Then see if frame has specified a specific blink off cursor type. */ | |
15542 | if (FRAME_BLINK_OFF_CURSOR (f) != DEFAULT_CURSOR) | |
15543 | { | |
15544 | *width = FRAME_BLINK_OFF_CURSOR_WIDTH (f); | |
15545 | return FRAME_BLINK_OFF_CURSOR (f); | |
15546 | } | |
7d0393cf JB |
15547 | |
15548 | /* Finally perform built-in cursor blinking: | |
cfe03a41 KS |
15549 | filled box <-> hollow box |
15550 | wide [h]bar <-> narrow [h]bar | |
15551 | narrow [h]bar <-> no cursor | |
15552 | other type <-> no cursor */ | |
15553 | ||
15554 | if (cursor_type == FILLED_BOX_CURSOR) | |
15555 | return HOLLOW_BOX_CURSOR; | |
15556 | ||
15557 | if ((cursor_type == BAR_CURSOR || cursor_type == HBAR_CURSOR) && *width > 1) | |
15558 | { | |
15559 | *width = 1; | |
15560 | return cursor_type; | |
15561 | } | |
15562 | ||
15563 | return NO_CURSOR; | |
15564 | } | |
15565 | ||
15566 | \f | |
5f5c8ee5 GM |
15567 | /*********************************************************************** |
15568 | Initialization | |
15569 | ***********************************************************************/ | |
15570 | ||
a2889657 JB |
15571 | void |
15572 | syms_of_xdisp () | |
15573 | { | |
c6e89d6c GM |
15574 | Vwith_echo_area_save_vector = Qnil; |
15575 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 15576 | |
c6e89d6c GM |
15577 | Vmessage_stack = Qnil; |
15578 | staticpro (&Vmessage_stack); | |
2311178e | 15579 | |
735c094c | 15580 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 15581 | staticpro (&Qinhibit_redisplay); |
735c094c | 15582 | |
b14bc55e RS |
15583 | message_dolog_marker1 = Fmake_marker (); |
15584 | staticpro (&message_dolog_marker1); | |
15585 | message_dolog_marker2 = Fmake_marker (); | |
15586 | staticpro (&message_dolog_marker2); | |
15587 | message_dolog_marker3 = Fmake_marker (); | |
15588 | staticpro (&message_dolog_marker3); | |
15589 | ||
5f5c8ee5 | 15590 | #if GLYPH_DEBUG |
7d4cc828 | 15591 | defsubr (&Sdump_frame_glyph_matrix); |
5f5c8ee5 GM |
15592 | defsubr (&Sdump_glyph_matrix); |
15593 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 15594 | defsubr (&Sdump_tool_bar_row); |
62397849 | 15595 | defsubr (&Strace_redisplay); |
bf9249e3 | 15596 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 15597 | #endif |
99a5de87 | 15598 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 15599 | defsubr (&Stool_bar_lines_needed); |
99a5de87 | 15600 | #endif |
8143e6ab | 15601 | defsubr (&Sformat_mode_line); |
5f5c8ee5 | 15602 | |
cf074754 RS |
15603 | staticpro (&Qmenu_bar_update_hook); |
15604 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
15605 | ||
d46fb96a | 15606 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 15607 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 15608 | |
399164b4 KH |
15609 | staticpro (&Qoverriding_local_map); |
15610 | Qoverriding_local_map = intern ("overriding-local-map"); | |
15611 | ||
75c43375 RS |
15612 | staticpro (&Qwindow_scroll_functions); |
15613 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
15614 | ||
e0bfbde6 RS |
15615 | staticpro (&Qredisplay_end_trigger_functions); |
15616 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
2311178e | 15617 | |
2e54982e RS |
15618 | staticpro (&Qinhibit_point_motion_hooks); |
15619 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
15620 | ||
9499d71b GM |
15621 | QCdata = intern (":data"); |
15622 | staticpro (&QCdata); | |
5f5c8ee5 | 15623 | Qdisplay = intern ("display"); |
f3751a65 | 15624 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
15625 | Qspace_width = intern ("space-width"); |
15626 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
15627 | Qraise = intern ("raise"); |
15628 | staticpro (&Qraise); | |
15629 | Qspace = intern ("space"); | |
15630 | staticpro (&Qspace); | |
f3751a65 GM |
15631 | Qmargin = intern ("margin"); |
15632 | staticpro (&Qmargin); | |
5f5c8ee5 | 15633 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 15634 | staticpro (&Qleft_margin); |
5f5c8ee5 | 15635 | Qright_margin = intern ("right-margin"); |
f3751a65 | 15636 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
15637 | Qalign_to = intern ("align-to"); |
15638 | staticpro (&Qalign_to); | |
15639 | QCalign_to = intern (":align-to"); | |
15640 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
15641 | Qrelative_width = intern ("relative-width"); |
15642 | staticpro (&Qrelative_width); | |
15643 | QCrelative_width = intern (":relative-width"); | |
15644 | staticpro (&QCrelative_width); | |
15645 | QCrelative_height = intern (":relative-height"); | |
15646 | staticpro (&QCrelative_height); | |
15647 | QCeval = intern (":eval"); | |
15648 | staticpro (&QCeval); | |
0fcf414f RS |
15649 | QCpropertize = intern (":propertize"); |
15650 | staticpro (&QCpropertize); | |
d3acf96b | 15651 | Qwhen = intern ("when"); |
f3751a65 | 15652 | staticpro (&Qwhen); |
886bd6f2 GM |
15653 | QCfile = intern (":file"); |
15654 | staticpro (&QCfile); | |
5f5c8ee5 GM |
15655 | Qfontified = intern ("fontified"); |
15656 | staticpro (&Qfontified); | |
15657 | Qfontification_functions = intern ("fontification-functions"); | |
15658 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
15659 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
15660 | staticpro (&Qtrailing_whitespace); | |
15661 | Qimage = intern ("image"); | |
15662 | staticpro (&Qimage); | |
ad4f174e GM |
15663 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
15664 | staticpro (&Qmessage_truncate_lines); | |
af79bccb RS |
15665 | Qcursor_in_non_selected_windows = intern ("cursor-in-non-selected-windows"); |
15666 | staticpro (&Qcursor_in_non_selected_windows); | |
6422c1d7 GM |
15667 | Qgrow_only = intern ("grow-only"); |
15668 | staticpro (&Qgrow_only); | |
e1477f43 GM |
15669 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
15670 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
15671 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
15672 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
15673 | Qposition = intern ("position"); |
15674 | staticpro (&Qposition); | |
15675 | Qbuffer_position = intern ("buffer-position"); | |
15676 | staticpro (&Qbuffer_position); | |
15677 | Qobject = intern ("object"); | |
15678 | staticpro (&Qobject); | |
cfe03a41 KS |
15679 | Qbar = intern ("bar"); |
15680 | staticpro (&Qbar); | |
15681 | Qhbar = intern ("hbar"); | |
15682 | staticpro (&Qhbar); | |
15683 | Qbox = intern ("box"); | |
15684 | staticpro (&Qbox); | |
15685 | Qhollow = intern ("hollow"); | |
15686 | staticpro (&Qhollow); | |
c53a1624 RS |
15687 | Qrisky_local_variable = intern ("risky-local-variable"); |
15688 | staticpro (&Qrisky_local_variable); | |
26683087 RS |
15689 | Qinhibit_free_realized_faces = intern ("inhibit-free-realized-faces"); |
15690 | staticpro (&Qinhibit_free_realized_faces); | |
5f5c8ee5 | 15691 | |
7033d6df RS |
15692 | list_of_error = Fcons (intern ("error"), Qnil); |
15693 | staticpro (&list_of_error); | |
15694 | ||
a2889657 JB |
15695 | last_arrow_position = Qnil; |
15696 | last_arrow_string = Qnil; | |
f3751a65 GM |
15697 | staticpro (&last_arrow_position); |
15698 | staticpro (&last_arrow_string); | |
2311178e | 15699 | |
c6e89d6c GM |
15700 | echo_buffer[0] = echo_buffer[1] = Qnil; |
15701 | staticpro (&echo_buffer[0]); | |
15702 | staticpro (&echo_buffer[1]); | |
15703 | ||
15704 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
15705 | staticpro (&echo_area_buffer[0]); | |
15706 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 15707 | |
6a94510a GM |
15708 | Vmessages_buffer_name = build_string ("*Messages*"); |
15709 | staticpro (&Vmessages_buffer_name); | |
0fcf414f RS |
15710 | |
15711 | mode_line_proptrans_alist = Qnil; | |
15712 | staticpro (&mode_line_proptrans_alist); | |
2311178e | 15713 | |
fec8f23e KS |
15714 | mode_line_string_list = Qnil; |
15715 | staticpro (&mode_line_string_list); | |
15716 | ||
7ee72033 MB |
15717 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
15718 | doc: /* Non-nil means highlight trailing whitespace. | |
228299fa | 15719 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
15720 | Vshow_trailing_whitespace = Qnil; |
15721 | ||
7ee72033 MB |
15722 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
15723 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 15724 | This is used for internal purposes. */); |
735c094c KH |
15725 | Vinhibit_redisplay = Qnil; |
15726 | ||
7ee72033 MB |
15727 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
15728 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
15729 | Vglobal_mode_string = Qnil; |
15730 | ||
7ee72033 MB |
15731 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
15732 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
15733 | This must be the beginning of a line in order to work. |
15734 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
15735 | Voverlay_arrow_position = Qnil; |
15736 | ||
7ee72033 MB |
15737 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
15738 | doc: /* String to display as an arrow. See also `overlay-arrow-position'. */); | |
a2889657 JB |
15739 | Voverlay_arrow_string = Qnil; |
15740 | ||
7ee72033 MB |
15741 | DEFVAR_INT ("scroll-step", &scroll_step, |
15742 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
15743 | If that fails to bring point back on frame, point is centered instead. |
15744 | If this is zero, point is always centered after it moves off frame. | |
15745 | If you want scrolling to always be a line at a time, you should set | |
15746 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
15747 | ||
7ee72033 MB |
15748 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
15749 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
15750 | A value of zero means to scroll the text to center point vertically |
15751 | in the window. */); | |
0789adb2 RS |
15752 | scroll_conservatively = 0; |
15753 | ||
7ee72033 MB |
15754 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
15755 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
15756 | Recenter the window whenever point gets within this many lines |
15757 | of the top or bottom of the window. */); | |
9afd2168 RS |
15758 | scroll_margin = 0; |
15759 | ||
5f5c8ee5 | 15760 | #if GLYPH_DEBUG |
7ee72033 | 15761 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 15762 | #endif |
a2889657 JB |
15763 | |
15764 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
15765 | &truncate_partial_width_windows, |
15766 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
15767 | truncate_partial_width_windows = 1; |
15768 | ||
7ee72033 MB |
15769 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
15770 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa | 15771 | Any other value means to use the appropriate face, `mode-line', |
ccfe8f57 | 15772 | `header-line', or `menu' respectively. */); |
1862a24e | 15773 | mode_line_inverse_video = 1; |
aa6d10fa | 15774 | |
7ee72033 MB |
15775 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
15776 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
15777 | If the buffer is bigger than this, the line number does not appear |
15778 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 15779 | Vline_number_display_limit = Qnil; |
fba9ce76 | 15780 | |
090703f4 | 15781 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
15782 | &line_number_display_limit_width, |
15783 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
15784 | If the average length of the lines near point is bigger than this, then the |
15785 | line number may be omitted from the mode line. */); | |
5d121aec KH |
15786 | line_number_display_limit_width = 200; |
15787 | ||
7ee72033 MB |
15788 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
15789 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 15790 | highlight_nonselected_windows = 0; |
d39b6696 | 15791 | |
7ee72033 MB |
15792 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
15793 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
15794 | Minibuffer-only frames don't count, but iconified frames do. |
15795 | This variable is not guaranteed to be accurate except while processing | |
15796 | `frame-title-format' and `icon-title-format'. */); | |
15797 | ||
7ee72033 MB |
15798 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
15799 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
15800 | \(Assuming the window manager supports this feature.) |
15801 | This variable has the same structure as `mode-line-format' (which see), | |
15802 | and is used only on frames for which no explicit name has been set | |
15803 | \(see `modify-frame-parameters'). */); | |
7ee72033 MB |
15804 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
15805 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
15806 | \(Assuming the window manager supports this feature.) |
15807 | This variable has the same structure as `mode-line-format' (which see), | |
15808 | and is used only on frames for which no explicit name has been set | |
15809 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
15810 | Vicon_title_format |
15811 | = Vframe_title_format | |
15812 | = Fcons (intern ("multiple-frames"), | |
15813 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 15814 | Fcons (Fcons (empty_string, |
d39b6696 KH |
15815 | Fcons (intern ("invocation-name"), |
15816 | Fcons (build_string ("@"), | |
15817 | Fcons (intern ("system-name"), | |
15818 | Qnil)))), | |
15819 | Qnil))); | |
5992c4f7 | 15820 | |
7ee72033 MB |
15821 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
15822 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
15823 | If nil, disable message logging. If t, log messages but don't truncate |
15824 | the buffer when it becomes large. */); | |
ac90c44f | 15825 | Vmessage_log_max = make_number (50); |
08b610e4 | 15826 | |
7ee72033 MB |
15827 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
15828 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
15829 | The value should be a list of functions that take one argument. |
15830 | Just before redisplay, for each frame, if any of its windows have changed | |
15831 | size since the last redisplay, or have been split or deleted, | |
15832 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 15833 | Vwindow_size_change_functions = Qnil; |
75c43375 | 15834 | |
7ee72033 MB |
15835 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
15836 | doc: /* List of Functions to call before redisplaying a window with scrolling. | |
228299fa GM |
15837 | Each function is called with two arguments, the window |
15838 | and its new display-start position. Note that the value of `window-end' | |
15839 | is not valid when these functions are called. */); | |
75c43375 | 15840 | Vwindow_scroll_functions = Qnil; |
2311178e | 15841 | |
7ee72033 MB |
15842 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
15843 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
15844 | This increases a tool-bar's height if not all tool-bar items are visible. |
15845 | It decreases a tool-bar's height when it would display blank lines | |
15846 | otherwise. */); | |
e037b9ec | 15847 | auto_resize_tool_bars_p = 1; |
2311178e | 15848 | |
7ee72033 MB |
15849 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
15850 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 15851 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 15852 | |
7ee72033 MB |
15853 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
15854 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa | 15855 | If an integer, use that for both horizontal and vertical margins. |
f6c89f27 | 15856 | Otherwise, value should be a pair of integers `(HORZ . VERT)' with |
228299fa GM |
15857 | HORZ specifying the horizontal margin, and VERT specifying the |
15858 | vertical margin. */); | |
c3d76173 | 15859 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 15860 | |
7ee72033 | 15861 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
6da3c85b | 15862 | doc: /* *Relief thickness of tool-bar buttons. */); |
c3d76173 | 15863 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 15864 | |
7ee72033 MB |
15865 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
15866 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
15867 | Each function is called with one argument POS. Functions must |
15868 | fontify a region starting at POS in the current buffer, and give | |
15869 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 15870 | Vfontification_functions = Qnil; |
6b9f0906 | 15871 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
15872 | |
15873 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
15874 | &unibyte_display_via_language_environment, |
15875 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
15876 | Specifically this means that unibyte non-ASCII characters |
15877 | are displayed by converting them to the equivalent multibyte characters | |
15878 | according to the current language environment. As a result, they are | |
15879 | displayed according to the current fontset. */); | |
7bbe686f | 15880 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 15881 | |
7ee72033 MB |
15882 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
15883 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
15884 | If a float, it specifies a fraction of the mini-window frame's height. |
15885 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 15886 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 15887 | |
7ee72033 MB |
15888 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
15889 | doc: /* *How to resize mini-windows. | |
228299fa GM |
15890 | A value of nil means don't automatically resize mini-windows. |
15891 | A value of t means resize them to fit the text displayed in them. | |
15892 | A value of `grow-only', the default, means let mini-windows grow | |
15893 | only, until their display becomes empty, at which point the windows | |
15894 | go back to their normal size. */); | |
6422c1d7 GM |
15895 | Vresize_mini_windows = Qgrow_only; |
15896 | ||
cfe03a41 KS |
15897 | DEFVAR_LISP ("cursor-in-non-selected-windows", |
15898 | &Vcursor_in_non_selected_windows, | |
15899 | doc: /* *Cursor type to display in non-selected windows. | |
15900 | t means to use hollow box cursor. See `cursor-type' for other values. */); | |
15901 | Vcursor_in_non_selected_windows = Qt; | |
15902 | ||
cfe03a41 KS |
15903 | DEFVAR_LISP ("blink-cursor-alist", &Vblink_cursor_alist, |
15904 | doc: /* Alist specifying how to blink the cursor off. | |
15905 | Each element has the form (ON-STATE . OFF-STATE). Whenever the | |
15906 | `cursor-type' frame-parameter or variable equals ON-STATE, | |
15907 | comparing using `equal', Emacs uses OFF-STATE to specify | |
15908 | how to blink it off. */); | |
15909 | Vblink_cursor_alist = Qnil; | |
2311178e | 15910 | |
e76d28d5 | 15911 | DEFVAR_BOOL ("auto-hscroll-mode", &automatic_hscrolling_p, |
7ee72033 | 15912 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); |
d475bcb8 | 15913 | automatic_hscrolling_p = 1; |
1df7e8f0 | 15914 | |
e76d28d5 | 15915 | DEFVAR_INT ("hscroll-margin", &hscroll_margin, |
1df7e8f0 EZ |
15916 | doc: /* *How many columns away from the window edge point is allowed to get |
15917 | before automatic hscrolling will horizontally scroll the window. */); | |
e76d28d5 | 15918 | hscroll_margin = 5; |
1df7e8f0 | 15919 | |
e76d28d5 | 15920 | DEFVAR_LISP ("hscroll-step", &Vhscroll_step, |
1df7e8f0 EZ |
15921 | doc: /* *How many columns to scroll the window when point gets too close to the edge. |
15922 | When point is less than `automatic-hscroll-margin' columns from the window | |
15923 | edge, automatic hscrolling will scroll the window by the amount of columns | |
15924 | determined by this variable. If its value is a positive integer, scroll that | |
15925 | many columns. If it's a positive floating-point number, it specifies the | |
15926 | fraction of the window's width to scroll. If it's nil or zero, point will be | |
15927 | centered horizontally after the scroll. Any other value, including negative | |
15928 | numbers, are treated as if the value were zero. | |
15929 | ||
15930 | Automatic hscrolling always moves point outside the scroll margin, so if | |
15931 | point was more than scroll step columns inside the margin, the window will | |
15932 | scroll more than the value given by the scroll step. | |
15933 | ||
15934 | Note that the lower bound for automatic hscrolling specified by `scroll-left' | |
15935 | and `scroll-right' overrides this variable's effect. */); | |
e76d28d5 | 15936 | Vhscroll_step = make_number (0); |
2311178e | 15937 | |
7ee72033 MB |
15938 | DEFVAR_LISP ("image-types", &Vimage_types, |
15939 | doc: /* List of supported image types. | |
228299fa | 15940 | Each element of the list is a symbol for a supported image type. */); |
e00daaa0 | 15941 | Vimage_types = Qnil; |
2311178e | 15942 | |
7ee72033 MB |
15943 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
15944 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 15945 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 15946 | message_truncate_lines = 0; |
0bca8940 | 15947 | |
7ee72033 MB |
15948 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
15949 | doc: /* Normal hook run for clicks on menu bar, before displaying a submenu. | |
228299fa | 15950 | Can be used to update submenus whose contents should vary. */); |
6422c1d7 | 15951 | Vmenu_bar_update_hook = Qnil; |
2311178e | 15952 | |
7ee72033 MB |
15953 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
15954 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 15955 | inhibit_menubar_update = 0; |
30a3f61c | 15956 | |
7ee72033 MB |
15957 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
15958 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 15959 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 15960 | |
26683087 RS |
15961 | DEFVAR_BOOL ("inhibit-free-realized-faces", &inhibit_free_realized_faces, |
15962 | doc: /* Non-nil means don't free realized faces. Internal use only. */); | |
15963 | inhibit_free_realized_faces = 0; | |
15964 | ||
69d1f7c9 | 15965 | #if GLYPH_DEBUG |
76cb5e06 GM |
15966 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
15967 | doc: /* Inhibit try_window_id display optimization. */); | |
15968 | inhibit_try_window_id = 0; | |
15969 | ||
15970 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
15971 | doc: /* Inhibit try_window_reusing display optimization. */); | |
15972 | inhibit_try_window_reusing = 0; | |
15973 | ||
15974 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
15975 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
15976 | inhibit_try_cursor_movement = 0; | |
15977 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
15978 | } |
15979 | ||
5f5c8ee5 GM |
15980 | |
15981 | /* Initialize this module when Emacs starts. */ | |
15982 | ||
dfcf069d | 15983 | void |
a2889657 JB |
15984 | init_xdisp () |
15985 | { | |
15986 | Lisp_Object root_window; | |
5f5c8ee5 | 15987 | struct window *mini_w; |
a2889657 | 15988 | |
04612a64 GM |
15989 | current_header_line_height = current_mode_line_height = -1; |
15990 | ||
5f5c8ee5 | 15991 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
15992 | |
15993 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 15994 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 15995 | |
a2889657 JB |
15996 | if (!noninteractive) |
15997 | { | |
5f5c8ee5 GM |
15998 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
15999 | int i; | |
16000 | ||
ac90c44f | 16001 | XWINDOW (root_window)->top = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 16002 | set_window_height (root_window, |
5f5c8ee5 | 16003 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 16004 | 0); |
ac90c44f | 16005 | mini_w->top = make_number (FRAME_HEIGHT (f) - 1); |
a2889657 JB |
16006 | set_window_height (minibuf_window, 1, 0); |
16007 | ||
ac90c44f GM |
16008 | XWINDOW (root_window)->width = make_number (FRAME_WIDTH (f)); |
16009 | mini_w->width = make_number (FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
16010 | |
16011 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
16012 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
16013 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
16014 | ||
2311178e | 16015 | /* The default ellipsis glyphs `...'. */ |
5f5c8ee5 | 16016 | for (i = 0; i < 3; ++i) |
ac90c44f | 16017 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 16018 | } |
5f5c8ee5 | 16019 | |
5f5c8ee5 | 16020 | { |
93da8435 SM |
16021 | /* Allocate the buffer for frame titles. |
16022 | Also used for `format-mode-line'. */ | |
5f5c8ee5 GM |
16023 | int size = 100; |
16024 | frame_title_buf = (char *) xmalloc (size); | |
16025 | frame_title_buf_end = frame_title_buf + size; | |
16026 | frame_title_ptr = NULL; | |
16027 | } | |
2311178e | 16028 | |
21fdfb65 | 16029 | help_echo_showing_p = 0; |
a2889657 | 16030 | } |
5f5c8ee5 GM |
16031 | |
16032 |