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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) | |
50 | direct_output_for_insert, | |
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 | ||
67 | What does redisplay? Obviously, it has to figure out somehow what | |
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 | ||
109 | ||
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 | |
123 | interface functions taking a iterator structure (struct it) | |
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 | ||
e0f712ba | 203 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) |
2e621225 | 204 | extern void set_frame_menubar P_ ((struct frame *f, int, int)); |
cd6dfed6 | 205 | extern int pending_menu_activation; |
76412d64 RS |
206 | #endif |
207 | ||
a2889657 JB |
208 | extern int interrupt_input; |
209 | extern int command_loop_level; | |
210 | ||
b6436d4e RS |
211 | extern int minibuffer_auto_raise; |
212 | ||
c4628384 RS |
213 | extern Lisp_Object Qface; |
214 | ||
399164b4 KH |
215 | extern Lisp_Object Voverriding_local_map; |
216 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 217 | extern Lisp_Object Qmenu_item; |
399164b4 | 218 | |
d46fb96a | 219 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 220 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 221 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 222 | Lisp_Object Qinhibit_point_motion_hooks; |
0fcf414f | 223 | Lisp_Object QCeval, Qwhen, QCfile, QCdata, QCpropertize; |
5f5c8ee5 | 224 | Lisp_Object Qfontified; |
6422c1d7 | 225 | Lisp_Object Qgrow_only; |
869fb12c | 226 | Lisp_Object Qinhibit_eval_during_redisplay; |
b384d6f8 | 227 | Lisp_Object Qbuffer_position, Qposition, Qobject; |
5f5c8ee5 | 228 | |
c53a1624 RS |
229 | Lisp_Object Qrisky_local_variable; |
230 | ||
7033d6df RS |
231 | /* Holds the list (error). */ |
232 | Lisp_Object list_of_error; | |
233 | ||
5f5c8ee5 GM |
234 | /* Functions called to fontify regions of text. */ |
235 | ||
236 | Lisp_Object Vfontification_functions; | |
237 | Lisp_Object Qfontification_functions; | |
238 | ||
e037b9ec | 239 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
240 | over them. */ |
241 | ||
e037b9ec | 242 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 243 | |
e037b9ec | 244 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 245 | |
35a41507 | 246 | Lisp_Object Vtool_bar_button_margin; |
5f5c8ee5 | 247 | |
e037b9ec | 248 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 249 | |
31ade731 | 250 | EMACS_INT tool_bar_button_relief; |
5f5c8ee5 | 251 | |
e037b9ec | 252 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
253 | items are visible, and no blank lines remain. */ |
254 | ||
e037b9ec | 255 | int auto_resize_tool_bars_p; |
399164b4 | 256 | |
735c094c KH |
257 | /* Non-nil means don't actually do any redisplay. */ |
258 | ||
259 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
260 | ||
30a3f61c GM |
261 | /* Non-zero means Lisp evaluation during redisplay is inhibited. */ |
262 | ||
869fb12c | 263 | int inhibit_eval_during_redisplay; |
30a3f61c | 264 | |
5f5c8ee5 GM |
265 | /* Names of text properties relevant for redisplay. */ |
266 | ||
a7e27ef7 | 267 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
4b41cebb | 268 | extern Lisp_Object Qface, Qinvisible, Qwidth; |
5f5c8ee5 GM |
269 | |
270 | /* Symbols used in text property values. */ | |
271 | ||
272 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 273 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 274 | Lisp_Object Qmargin; |
a7e27ef7 | 275 | extern Lisp_Object Qheight; |
5f5c8ee5 | 276 | |
8f897821 | 277 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 278 | |
8f897821 | 279 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
280 | |
281 | /* Name of the face used to highlight trailing whitespace. */ | |
282 | ||
283 | Lisp_Object Qtrailing_whitespace; | |
284 | ||
285 | /* The symbol `image' which is the car of the lists used to represent | |
286 | images in Lisp. */ | |
287 | ||
288 | Lisp_Object Qimage; | |
289 | ||
290 | /* Non-zero means print newline to stdout before next mini-buffer | |
291 | message. */ | |
a2889657 JB |
292 | |
293 | int noninteractive_need_newline; | |
294 | ||
5f5c8ee5 | 295 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 296 | |
3c6595e0 | 297 | static int message_log_need_newline; |
f88eb0b6 | 298 | |
b14bc55e RS |
299 | /* Three markers that message_dolog uses. |
300 | It could allocate them itself, but that causes trouble | |
301 | in handling memory-full errors. */ | |
302 | static Lisp_Object message_dolog_marker1; | |
303 | static Lisp_Object message_dolog_marker2; | |
304 | static Lisp_Object message_dolog_marker3; | |
5f5c8ee5 GM |
305 | \f |
306 | /* The buffer position of the first character appearing entirely or | |
307 | partially on the line of the selected window which contains the | |
308 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
309 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 310 | |
5f5c8ee5 | 311 | static struct text_pos this_line_start_pos; |
a2889657 | 312 | |
5f5c8ee5 GM |
313 | /* Number of characters past the end of the line above, including the |
314 | terminating newline. */ | |
315 | ||
316 | static struct text_pos this_line_end_pos; | |
317 | ||
318 | /* The vertical positions and the height of this line. */ | |
a2889657 | 319 | |
a2889657 | 320 | static int this_line_vpos; |
5f5c8ee5 GM |
321 | static int this_line_y; |
322 | static int this_line_pixel_height; | |
323 | ||
324 | /* X position at which this display line starts. Usually zero; | |
325 | negative if first character is partially visible. */ | |
326 | ||
327 | static int this_line_start_x; | |
a2889657 | 328 | |
5f5c8ee5 | 329 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 330 | |
a2889657 JB |
331 | static struct buffer *this_line_buffer; |
332 | ||
5f5c8ee5 GM |
333 | /* Nonzero means truncate lines in all windows less wide than the |
334 | frame. */ | |
a2889657 | 335 | |
a2889657 JB |
336 | int truncate_partial_width_windows; |
337 | ||
7bbe686f | 338 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 339 | |
7bbe686f | 340 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
341 | |
342 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
343 | Not guaranteed to be accurate except while parsing | |
344 | frame-title-format. */ | |
7bbe686f | 345 | |
d39b6696 KH |
346 | int multiple_frames; |
347 | ||
a2889657 JB |
348 | Lisp_Object Vglobal_mode_string; |
349 | ||
350 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 351 | |
a2889657 JB |
352 | Lisp_Object Voverlay_arrow_position; |
353 | ||
5f5c8ee5 GM |
354 | /* String to display for the arrow. Only used on terminal frames. */ |
355 | ||
a2889657 JB |
356 | Lisp_Object Voverlay_arrow_string; |
357 | ||
5f5c8ee5 GM |
358 | /* Values of those variables at last redisplay. However, if |
359 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
360 | numerical position. */ | |
361 | ||
d45de95b RS |
362 | static Lisp_Object last_arrow_position, last_arrow_string; |
363 | ||
5f5c8ee5 GM |
364 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
365 | ||
d39b6696 KH |
366 | Lisp_Object Vframe_title_format; |
367 | ||
5f5c8ee5 GM |
368 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
369 | ||
d39b6696 KH |
370 | Lisp_Object Vicon_title_format; |
371 | ||
08b610e4 RS |
372 | /* List of functions to call when a window's size changes. These |
373 | functions get one arg, a frame on which one or more windows' sizes | |
374 | have changed. */ | |
5f5c8ee5 | 375 | |
08b610e4 RS |
376 | static Lisp_Object Vwindow_size_change_functions; |
377 | ||
0bca8940 | 378 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 379 | |
a2889657 | 380 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 381 | |
5f5c8ee5 | 382 | static int overlay_arrow_seen; |
ca26e1c8 | 383 | |
fba9ce76 | 384 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 385 | |
5f5c8ee5 GM |
386 | int highlight_nonselected_windows; |
387 | ||
388 | /* If cursor motion alone moves point off frame, try scrolling this | |
389 | many lines up or down if that will bring it back. */ | |
390 | ||
31ade731 | 391 | static EMACS_INT scroll_step; |
a2889657 | 392 | |
4b41cebb | 393 | /* Nonzero means scroll just far enough to bring point back on the |
5f5c8ee5 GM |
394 | screen, when appropriate. */ |
395 | ||
31ade731 | 396 | static EMACS_INT scroll_conservatively; |
0789adb2 | 397 | |
5f5c8ee5 GM |
398 | /* Recenter the window whenever point gets within this many lines of |
399 | the top or bottom of the window. This value is translated into a | |
400 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
401 | there is really a fixed pixel height scroll margin. */ | |
402 | ||
31ade731 | 403 | EMACS_INT scroll_margin; |
9afd2168 | 404 | |
5f5c8ee5 GM |
405 | /* Number of windows showing the buffer of the selected window (or |
406 | another buffer with the same base buffer). keyboard.c refers to | |
407 | this. */ | |
a2889657 | 408 | |
a2889657 JB |
409 | int buffer_shared; |
410 | ||
5f5c8ee5 | 411 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 412 | |
5f5c8ee5 | 413 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 414 | |
1862a24e MB |
415 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
416 | (this slightly odd definition is for compatibility with previous versions | |
417 | of emacs), non-zero means display them using their respective faces. | |
418 | ||
419 | This variable is deprecated. */ | |
a2889657 | 420 | |
a2889657 JB |
421 | int mode_line_inverse_video; |
422 | ||
5f5c8ee5 GM |
423 | /* Prompt to display in front of the mini-buffer contents. */ |
424 | ||
8c5b6a0a | 425 | Lisp_Object minibuf_prompt; |
a2889657 | 426 | |
5f5c8ee5 GM |
427 | /* Width of current mini-buffer prompt. Only set after display_line |
428 | of the line that contains the prompt. */ | |
429 | ||
a2889657 | 430 | int minibuf_prompt_width; |
5f5c8ee5 | 431 | |
5f5c8ee5 GM |
432 | /* This is the window where the echo area message was displayed. It |
433 | is always a mini-buffer window, but it may not be the same window | |
434 | currently active as a mini-buffer. */ | |
435 | ||
73af359d RS |
436 | Lisp_Object echo_area_window; |
437 | ||
c6e89d6c GM |
438 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
439 | pushes the current message and the value of | |
440 | message_enable_multibyte on the stack, the function restore_message | |
441 | pops the stack and displays MESSAGE again. */ | |
442 | ||
443 | Lisp_Object Vmessage_stack; | |
444 | ||
a3788d53 RS |
445 | /* Nonzero means multibyte characters were enabled when the echo area |
446 | message was specified. */ | |
5f5c8ee5 | 447 | |
a3788d53 RS |
448 | int message_enable_multibyte; |
449 | ||
4b41cebb | 450 | /* Nonzero if we should redraw the mode lines on the next redisplay. */ |
5f5c8ee5 | 451 | |
a2889657 JB |
452 | int update_mode_lines; |
453 | ||
5f5c8ee5 | 454 | /* Nonzero if window sizes or contents have changed since last |
4b41cebb | 455 | redisplay that finished. */ |
5f5c8ee5 | 456 | |
a2889657 JB |
457 | int windows_or_buffers_changed; |
458 | ||
5fb96e96 RS |
459 | /* Nonzero means a frame's cursor type has been changed. */ |
460 | ||
461 | int cursor_type_changed; | |
462 | ||
5f5c8ee5 GM |
463 | /* Nonzero after display_mode_line if %l was used and it displayed a |
464 | line number. */ | |
465 | ||
aa6d10fa RS |
466 | int line_number_displayed; |
467 | ||
468 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 469 | |
090703f4 | 470 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 471 | |
4b41cebb | 472 | /* Line width to consider when repositioning for line number display. */ |
5d121aec | 473 | |
31ade731 | 474 | static EMACS_INT line_number_display_limit_width; |
5d121aec | 475 | |
5f5c8ee5 GM |
476 | /* Number of lines to keep in the message log buffer. t means |
477 | infinite. nil means don't log at all. */ | |
478 | ||
5992c4f7 | 479 | Lisp_Object Vmessage_log_max; |
d45de95b | 480 | |
6a94510a GM |
481 | /* The name of the *Messages* buffer, a string. */ |
482 | ||
483 | static Lisp_Object Vmessages_buffer_name; | |
484 | ||
c6e89d6c GM |
485 | /* Current, index 0, and last displayed echo area message. Either |
486 | buffers from echo_buffers, or nil to indicate no message. */ | |
487 | ||
488 | Lisp_Object echo_area_buffer[2]; | |
489 | ||
490 | /* The buffers referenced from echo_area_buffer. */ | |
491 | ||
492 | static Lisp_Object echo_buffer[2]; | |
493 | ||
494 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
495 | ||
496 | static Lisp_Object Vwith_echo_area_save_vector; | |
497 | ||
498 | /* Non-zero means display_echo_area should display the last echo area | |
499 | message again. Set by redisplay_preserve_echo_area. */ | |
500 | ||
501 | static int display_last_displayed_message_p; | |
502 | ||
503 | /* Nonzero if echo area is being used by print; zero if being used by | |
504 | message. */ | |
505 | ||
506 | int message_buf_print; | |
507 | ||
e1477f43 GM |
508 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
509 | ||
510 | Lisp_Object Qinhibit_menubar_update; | |
511 | int inhibit_menubar_update; | |
512 | ||
9142dd5b GM |
513 | /* Maximum height for resizing mini-windows. Either a float |
514 | specifying a fraction of the available height, or an integer | |
515 | specifying a number of lines. */ | |
c6e89d6c | 516 | |
ad4f174e GM |
517 | Lisp_Object Vmax_mini_window_height; |
518 | ||
519 | /* Non-zero means messages should be displayed with truncated | |
520 | lines instead of being continued. */ | |
521 | ||
522 | int message_truncate_lines; | |
523 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 524 | |
6e019995 GM |
525 | /* Set to 1 in clear_message to make redisplay_internal aware |
526 | of an emptied echo area. */ | |
527 | ||
528 | static int message_cleared_p; | |
529 | ||
d6d26ed3 GM |
530 | /* Non-zero means we want a hollow cursor in windows that are not |
531 | selected. Zero means there's no cursor in such windows. */ | |
532 | ||
533 | int cursor_in_non_selected_windows; | |
af79bccb | 534 | Lisp_Object Qcursor_in_non_selected_windows; |
d6d26ed3 | 535 | |
5f5c8ee5 GM |
536 | /* A scratch glyph row with contents used for generating truncation |
537 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 538 | |
5f5c8ee5 GM |
539 | #define MAX_SCRATCH_GLYPHS 100 |
540 | struct glyph_row scratch_glyph_row; | |
541 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 542 | |
5f5c8ee5 GM |
543 | /* Ascent and height of the last line processed by move_it_to. */ |
544 | ||
545 | static int last_max_ascent, last_height; | |
546 | ||
21fdfb65 GM |
547 | /* Non-zero if there's a help-echo in the echo area. */ |
548 | ||
549 | int help_echo_showing_p; | |
550 | ||
04612a64 GM |
551 | /* If >= 0, computed, exact values of mode-line and header-line height |
552 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
553 | CURRENT_HEADER_LINE_HEIGHT. */ | |
554 | ||
555 | int current_mode_line_height, current_header_line_height; | |
556 | ||
5f5c8ee5 GM |
557 | /* The maximum distance to look ahead for text properties. Values |
558 | that are too small let us call compute_char_face and similar | |
559 | functions too often which is expensive. Values that are too large | |
560 | let us call compute_char_face and alike too often because we | |
561 | might not be interested in text properties that far away. */ | |
562 | ||
563 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
564 | ||
47589c8c GM |
565 | #if GLYPH_DEBUG |
566 | ||
76cb5e06 GM |
567 | /* Variables to turn off display optimizations from Lisp. */ |
568 | ||
569 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
570 | int inhibit_try_cursor_movement; | |
571 | ||
5f5c8ee5 GM |
572 | /* Non-zero means print traces of redisplay if compiled with |
573 | GLYPH_DEBUG != 0. */ | |
574 | ||
5f5c8ee5 | 575 | int trace_redisplay_p; |
47589c8c | 576 | |
546a4f00 | 577 | #endif /* GLYPH_DEBUG */ |
47589c8c | 578 | |
546a4f00 AI |
579 | #ifdef DEBUG_TRACE_MOVE |
580 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
581 | int trace_move; |
582 | ||
47589c8c GM |
583 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
584 | #else | |
91c3f500 | 585 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 586 | #endif |
546a4f00 | 587 | |
d475bcb8 GM |
588 | /* Non-zero means automatically scroll windows horizontally to make |
589 | point visible. */ | |
590 | ||
591 | int automatic_hscrolling_p; | |
592 | ||
1df7e8f0 EZ |
593 | /* How close to the margin can point get before the window is scrolled |
594 | horizontally. */ | |
5d335845 | 595 | EMACS_INT hscroll_margin; |
1df7e8f0 EZ |
596 | |
597 | /* How much to scroll horizontally when point is inside the above margin. */ | |
e76d28d5 | 598 | Lisp_Object Vhscroll_step; |
1df7e8f0 | 599 | |
e00daaa0 GM |
600 | /* A list of symbols, one for each supported image type. */ |
601 | ||
602 | Lisp_Object Vimage_types; | |
603 | ||
6422c1d7 | 604 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 605 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
606 | display. If `grow-only', let mini-windows grow only until they |
607 | become empty. */ | |
608 | ||
609 | Lisp_Object Vresize_mini_windows; | |
610 | ||
82a7ab23 RS |
611 | /* Buffer being redisplayed -- for redisplay_window_error. */ |
612 | ||
613 | struct buffer *displayed_buffer; | |
614 | ||
5f5c8ee5 GM |
615 | /* Value returned from text property handlers (see below). */ |
616 | ||
617 | enum prop_handled | |
3c6595e0 | 618 | { |
5f5c8ee5 GM |
619 | HANDLED_NORMALLY, |
620 | HANDLED_RECOMPUTE_PROPS, | |
621 | HANDLED_OVERLAY_STRING_CONSUMED, | |
622 | HANDLED_RETURN | |
623 | }; | |
3c6595e0 | 624 | |
5f5c8ee5 GM |
625 | /* A description of text properties that redisplay is interested |
626 | in. */ | |
3c6595e0 | 627 | |
5f5c8ee5 GM |
628 | struct props |
629 | { | |
630 | /* The name of the property. */ | |
631 | Lisp_Object *name; | |
90adcf20 | 632 | |
5f5c8ee5 GM |
633 | /* A unique index for the property. */ |
634 | enum prop_idx idx; | |
635 | ||
636 | /* A handler function called to set up iterator IT from the property | |
637 | at IT's current position. Value is used to steer handle_stop. */ | |
638 | enum prop_handled (*handler) P_ ((struct it *it)); | |
639 | }; | |
640 | ||
641 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
642 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
643 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 644 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
645 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
646 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
647 | ||
648 | /* Properties handled by iterators. */ | |
649 | ||
650 | static struct props it_props[] = | |
5992c4f7 | 651 | { |
5f5c8ee5 GM |
652 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
653 | /* Handle `face' before `display' because some sub-properties of | |
654 | `display' need to know the face. */ | |
655 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
656 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
657 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 658 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
659 | {NULL, 0, NULL} |
660 | }; | |
5992c4f7 | 661 | |
5f5c8ee5 GM |
662 | /* Value is the position described by X. If X is a marker, value is |
663 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 664 | |
5f5c8ee5 | 665 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 666 | |
5f5c8ee5 | 667 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 668 | |
5f5c8ee5 GM |
669 | enum move_it_result |
670 | { | |
671 | /* Not used. Undefined value. */ | |
672 | MOVE_UNDEFINED, | |
bab29e15 | 673 | |
5f5c8ee5 GM |
674 | /* Move ended at the requested buffer position or ZV. */ |
675 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 676 | |
5f5c8ee5 GM |
677 | /* Move ended at the requested X pixel position. */ |
678 | MOVE_X_REACHED, | |
12adba34 | 679 | |
5f5c8ee5 GM |
680 | /* Move within a line ended at the end of a line that must be |
681 | continued. */ | |
682 | MOVE_LINE_CONTINUED, | |
683 | ||
684 | /* Move within a line ended at the end of a line that would | |
685 | be displayed truncated. */ | |
686 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 687 | |
5f5c8ee5 GM |
688 | /* Move within a line ended at a line end. */ |
689 | MOVE_NEWLINE_OR_CR | |
690 | }; | |
12adba34 | 691 | |
ff6c30e5 | 692 | |
5f5c8ee5 GM |
693 | \f |
694 | /* Function prototypes. */ | |
695 | ||
5a08cbaf | 696 | static void setup_for_ellipsis P_ ((struct it *)); |
43c09969 | 697 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
74bd6d65 GM |
698 | static int single_display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
699 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); | |
cafafe0b | 700 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 701 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 702 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
703 | |
704 | #if 0 | |
2e621225 | 705 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
706 | #endif |
707 | ||
2e621225 GM |
708 | static int next_element_from_ellipsis P_ ((struct it *)); |
709 | static void pint2str P_ ((char *, int, int)); | |
710 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
711 | struct text_pos)); | |
712 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
713 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
714 | static void store_frame_title_char P_ ((char)); | |
715 | static int store_frame_title P_ ((unsigned char *, int, int)); | |
716 | static void x_consider_frame_title P_ ((Lisp_Object)); | |
717 | static void handle_stop P_ ((struct it *)); | |
718 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 719 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 720 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
721 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
722 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 723 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
724 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
725 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 726 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
727 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
728 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
729 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 730 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
731 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
732 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 733 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 734 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
735 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
736 | struct text_pos)); | |
737 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 738 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 GM |
739 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
740 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
741 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 742 | static int append_space P_ ((struct it *, int)); |
cb617e7c | 743 | static int make_cursor_line_fully_visible P_ ((struct window *)); |
31ade731 | 744 | static int try_scrolling P_ ((Lisp_Object, int, EMACS_INT, EMACS_INT, int)); |
47589c8c | 745 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
746 | static int trailing_whitespace_p P_ ((int)); |
747 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
748 | static void push_it P_ ((struct it *)); |
749 | static void pop_it P_ ((struct it *)); | |
750 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
751 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 752 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
753 | static void redisplay_windows P_ ((Lisp_Object)); |
754 | static void redisplay_window P_ ((Lisp_Object, int)); | |
82a7ab23 RS |
755 | static Lisp_Object redisplay_window_error (); |
756 | static Lisp_Object redisplay_window_0 P_ ((Lisp_Object)); | |
757 | static Lisp_Object redisplay_window_1 P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
758 | static void update_menu_bar P_ ((struct frame *, int)); |
759 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
760 | static int try_window_id P_ ((struct window *)); | |
761 | static int display_line P_ ((struct it *)); | |
715e84c9 | 762 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 763 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
c53a1624 | 764 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object, Lisp_Object, int)); |
72f62cb5 | 765 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
766 | static void display_menu_bar P_ ((struct window *)); |
767 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
768 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
769 | int, int, struct it *, int, int, int, int)); | |
770 | static void compute_line_metrics P_ ((struct it *)); | |
771 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 772 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 773 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
774 | static void reseat P_ ((struct it *, struct text_pos, int)); |
775 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
776 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
777 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 778 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
779 | static int next_element_from_display_vector P_ ((struct it *)); |
780 | static int next_element_from_string P_ ((struct it *)); | |
781 | static int next_element_from_c_string P_ ((struct it *)); | |
782 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 783 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
784 | static int next_element_from_image P_ ((struct it *)); |
785 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 786 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
787 | static int init_from_display_pos P_ ((struct it *, struct window *, |
788 | struct display_pos *)); | |
5f5c8ee5 GM |
789 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
790 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
791 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
792 | int, int, int)); | |
793 | void move_it_vertically_backward P_ ((struct it *, int)); | |
794 | static void init_to_row_start P_ ((struct it *, struct window *, | |
795 | struct glyph_row *)); | |
47d57b22 GM |
796 | static int init_to_row_end P_ ((struct it *, struct window *, |
797 | struct glyph_row *)); | |
5f5c8ee5 | 798 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 799 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
800 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
801 | Lisp_Object, int)); | |
802 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
803 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
804 | static int number_of_chars P_ ((unsigned char *, int)); | |
805 | static void compute_stop_pos P_ ((struct it *)); | |
806 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
807 | Lisp_Object)); | |
808 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
809 | static int next_overlay_change P_ ((int)); | |
810 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
a61b7058 GM |
811 | Lisp_Object, struct text_pos *, |
812 | int)); | |
06a12811 | 813 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
814 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
815 | struct window *)); | |
5f5c8ee5 GM |
816 | |
817 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
818 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 819 | |
5f5c8ee5 | 820 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 821 | |
e037b9ec GM |
822 | static void update_tool_bar P_ ((struct frame *, int)); |
823 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
824 | static int redisplay_tool_bar P_ ((struct frame *)); | |
825 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 826 | |
5f5c8ee5 | 827 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 828 | |
5f5c8ee5 GM |
829 | \f |
830 | /*********************************************************************** | |
831 | Window display dimensions | |
832 | ***********************************************************************/ | |
12adba34 | 833 | |
5f5c8ee5 GM |
834 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
835 | text in window W. This is the height of W minus the height of a | |
836 | mode line, if any. */ | |
837 | ||
838 | INLINE int | |
839 | window_text_bottom_y (w) | |
840 | struct window *w; | |
841 | { | |
842 | struct frame *f = XFRAME (w->frame); | |
843 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
1a578e9b | 844 | |
5f5c8ee5 GM |
845 | if (WINDOW_WANTS_MODELINE_P (w)) |
846 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
847 | return height; | |
f88eb0b6 KH |
848 | } |
849 | ||
f82aff7c | 850 | |
5f5c8ee5 | 851 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 852 | means return the total width of W, not including fringes to |
5f5c8ee5 | 853 | the left and right of the window. */ |
ff6c30e5 | 854 | |
5f5c8ee5 GM |
855 | INLINE int |
856 | window_box_width (w, area) | |
857 | struct window *w; | |
858 | int area; | |
859 | { | |
860 | struct frame *f = XFRAME (w->frame); | |
861 | int width = XFASTINT (w->width); | |
862 | ||
863 | if (!w->pseudo_window_p) | |
ff6c30e5 | 864 | { |
b46952ae | 865 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FRINGE_COLS (f); |
5f5c8ee5 GM |
866 | |
867 | if (area == TEXT_AREA) | |
868 | { | |
869 | if (INTEGERP (w->left_margin_width)) | |
870 | width -= XFASTINT (w->left_margin_width); | |
871 | if (INTEGERP (w->right_margin_width)) | |
872 | width -= XFASTINT (w->right_margin_width); | |
873 | } | |
874 | else if (area == LEFT_MARGIN_AREA) | |
875 | width = (INTEGERP (w->left_margin_width) | |
876 | ? XFASTINT (w->left_margin_width) : 0); | |
877 | else if (area == RIGHT_MARGIN_AREA) | |
878 | width = (INTEGERP (w->right_margin_width) | |
879 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 880 | } |
5f5c8ee5 GM |
881 | |
882 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 883 | } |
1adc55de | 884 | |
1adc55de | 885 | |
5f5c8ee5 | 886 | /* Return the pixel height of the display area of window W, not |
4b41cebb | 887 | including mode lines of W, if any. */ |
f88eb0b6 | 888 | |
5f5c8ee5 GM |
889 | INLINE int |
890 | window_box_height (w) | |
891 | struct window *w; | |
f88eb0b6 | 892 | { |
5f5c8ee5 GM |
893 | struct frame *f = XFRAME (w->frame); |
894 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
7ecd4937 GM |
895 | |
896 | xassert (height >= 0); | |
5f5c8ee5 | 897 | |
d9c9e99c MB |
898 | /* Note: the code below that determines the mode-line/header-line |
899 | height is essentially the same as that contained in the macro | |
900 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
901 | the appropriate glyph row has its `mode_line_p' flag set, | |
902 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
903 | ||
5f5c8ee5 | 904 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
905 | { |
906 | struct glyph_row *ml_row | |
907 | = (w->current_matrix && w->current_matrix->rows | |
908 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
909 | : 0); | |
910 | if (ml_row && ml_row->mode_line_p) | |
911 | height -= ml_row->height; | |
912 | else | |
96d2320f | 913 | height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w)); |
97dff879 | 914 | } |
5f5c8ee5 | 915 | |
045dee35 | 916 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
917 | { |
918 | struct glyph_row *hl_row | |
919 | = (w->current_matrix && w->current_matrix->rows | |
920 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
921 | : 0); | |
922 | if (hl_row && hl_row->mode_line_p) | |
923 | height -= hl_row->height; | |
924 | else | |
925 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
926 | } | |
5f5c8ee5 | 927 | |
7c75be36 PJ |
928 | /* With a very small font and a mode-line that's taller than |
929 | default, we might end up with a negative height. */ | |
930 | return max (0, height); | |
5992c4f7 KH |
931 | } |
932 | ||
933 | ||
5f5c8ee5 GM |
934 | /* Return the frame-relative coordinate of the left edge of display |
935 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 936 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 937 | |
5f5c8ee5 GM |
938 | INLINE int |
939 | window_box_left (w, area) | |
940 | struct window *w; | |
941 | int area; | |
90adcf20 | 942 | { |
5f5c8ee5 GM |
943 | struct frame *f = XFRAME (w->frame); |
944 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 945 | |
5f5c8ee5 | 946 | if (!w->pseudo_window_p) |
90adcf20 | 947 | { |
5f5c8ee5 | 948 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
b46952ae | 949 | + FRAME_LEFT_FRINGE_WIDTH (f)); |
5f5c8ee5 GM |
950 | |
951 | if (area == TEXT_AREA) | |
952 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
953 | else if (area == RIGHT_MARGIN_AREA) | |
954 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
955 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 956 | } |
73af359d | 957 | |
5f5c8ee5 GM |
958 | return x; |
959 | } | |
90adcf20 | 960 | |
b6436d4e | 961 | |
5f5c8ee5 GM |
962 | /* Return the frame-relative coordinate of the right edge of display |
963 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 964 | whole window, to the left of the right fringe of W. */ |
ded34426 | 965 | |
5f5c8ee5 GM |
966 | INLINE int |
967 | window_box_right (w, area) | |
968 | struct window *w; | |
969 | int area; | |
970 | { | |
971 | return window_box_left (w, area) + window_box_width (w, area); | |
972 | } | |
973 | ||
974 | ||
975 | /* Get the bounding box of the display area AREA of window W, without | |
976 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 977 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
978 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
979 | coordinates of the upper-left corner of the box. Return in | |
980 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
981 | ||
982 | INLINE void | |
983 | window_box (w, area, box_x, box_y, box_width, box_height) | |
984 | struct window *w; | |
985 | int area; | |
986 | int *box_x, *box_y, *box_width, *box_height; | |
987 | { | |
988 | struct frame *f = XFRAME (w->frame); | |
989 | ||
990 | *box_width = window_box_width (w, area); | |
991 | *box_height = window_box_height (w); | |
992 | *box_x = window_box_left (w, area); | |
993 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
994 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
995 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
996 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 997 | } |
1adc55de | 998 | |
1adc55de | 999 | |
5f5c8ee5 | 1000 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
1001 | mode lines. AREA < 0 means the whole window, not including the |
1002 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
1003 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
1004 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
1005 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
1006 | box. */ | |
ded34426 | 1007 | |
5f5c8ee5 GM |
1008 | INLINE void |
1009 | window_box_edges (w, area, top_left_x, top_left_y, | |
1010 | bottom_right_x, bottom_right_y) | |
1011 | struct window *w; | |
1012 | int area; | |
1013 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 1014 | { |
5f5c8ee5 GM |
1015 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
1016 | bottom_right_y); | |
1017 | *bottom_right_x += *top_left_x; | |
1018 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
1019 | } |
1020 | ||
5f5c8ee5 GM |
1021 | |
1022 | \f | |
1023 | /*********************************************************************** | |
1024 | Utilities | |
1025 | ***********************************************************************/ | |
1026 | ||
8b6ea97f GM |
1027 | /* Return the bottom y-position of the line the iterator IT is in. |
1028 | This can modify IT's settings. */ | |
1029 | ||
1030 | int | |
1031 | line_bottom_y (it) | |
1032 | struct it *it; | |
1033 | { | |
1034 | int line_height = it->max_ascent + it->max_descent; | |
1035 | int line_top_y = it->current_y; | |
1036 | ||
1037 | if (line_height == 0) | |
1038 | { | |
1039 | if (last_height) | |
1040 | line_height = last_height; | |
1041 | else if (IT_CHARPOS (*it) < ZV) | |
1042 | { | |
1043 | move_it_by_lines (it, 1, 1); | |
1044 | line_height = (it->max_ascent || it->max_descent | |
1045 | ? it->max_ascent + it->max_descent | |
1046 | : last_height); | |
1047 | } | |
1048 | else | |
1049 | { | |
1050 | struct glyph_row *row = it->glyph_row; | |
1051 | ||
1052 | /* Use the default character height. */ | |
1053 | it->glyph_row = NULL; | |
1054 | it->what = IT_CHARACTER; | |
1055 | it->c = ' '; | |
1056 | it->len = 1; | |
1057 | PRODUCE_GLYPHS (it); | |
1058 | line_height = it->ascent + it->descent; | |
1059 | it->glyph_row = row; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | return line_top_y + line_height; | |
1064 | } | |
1065 | ||
1066 | ||
0db95684 GM |
1067 | /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to |
1068 | 1 if POS is visible and the line containing POS is fully visible. | |
1069 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line | |
1070 | and header-lines heights. */ | |
3a641a69 GM |
1071 | |
1072 | int | |
04612a64 | 1073 | pos_visible_p (w, charpos, fully, exact_mode_line_heights_p) |
3a641a69 | 1074 | struct window *w; |
04612a64 | 1075 | int charpos, *fully, exact_mode_line_heights_p; |
3a641a69 GM |
1076 | { |
1077 | struct it it; | |
1078 | struct text_pos top; | |
fcab1954 GM |
1079 | int visible_p; |
1080 | struct buffer *old_buffer = NULL; | |
1081 | ||
1082 | if (XBUFFER (w->buffer) != current_buffer) | |
1083 | { | |
1084 | old_buffer = current_buffer; | |
1085 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1086 | } | |
3a641a69 GM |
1087 | |
1088 | *fully = visible_p = 0; | |
1089 | SET_TEXT_POS_FROM_MARKER (top, w->start); | |
04612a64 GM |
1090 | |
1091 | /* Compute exact mode line heights, if requested. */ | |
1092 | if (exact_mode_line_heights_p) | |
1093 | { | |
1094 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1095 | current_mode_line_height | |
96d2320f | 1096 | = display_mode_line (w, CURRENT_MODE_LINE_FACE_ID (w), |
04612a64 GM |
1097 | current_buffer->mode_line_format); |
1098 | ||
1099 | if (WINDOW_WANTS_HEADER_LINE_P (w)) | |
1100 | current_header_line_height | |
1101 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1102 | current_buffer->header_line_format); | |
1103 | } | |
3a641a69 | 1104 | |
04612a64 | 1105 | start_display (&it, w, top); |
3a641a69 GM |
1106 | move_it_to (&it, charpos, 0, it.last_visible_y, -1, |
1107 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
a13be207 GM |
1108 | |
1109 | /* Note that we may overshoot because of invisible text. */ | |
1110 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1111 | { |
8b6ea97f GM |
1112 | int top_y = it.current_y; |
1113 | int bottom_y = line_bottom_y (&it); | |
fcab1954 | 1114 | int window_top_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
3a641a69 | 1115 | |
8b6ea97f GM |
1116 | if (top_y < window_top_y) |
1117 | visible_p = bottom_y > window_top_y; | |
1118 | else if (top_y < it.last_visible_y) | |
fcab1954 GM |
1119 | { |
1120 | visible_p = 1; | |
8b6ea97f | 1121 | *fully = bottom_y <= it.last_visible_y; |
fcab1954 | 1122 | } |
3a641a69 GM |
1123 | } |
1124 | else if (it.current_y + it.max_ascent + it.max_descent > it.last_visible_y) | |
1125 | { | |
1126 | move_it_by_lines (&it, 1, 0); | |
1127 | if (charpos < IT_CHARPOS (it)) | |
1128 | { | |
1129 | visible_p = 1; | |
1130 | *fully = 0; | |
1131 | } | |
1132 | } | |
fcab1954 GM |
1133 | |
1134 | if (old_buffer) | |
1135 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1136 | |
1137 | current_header_line_height = current_mode_line_height = -1; | |
3a641a69 GM |
1138 | return visible_p; |
1139 | } | |
1140 | ||
1141 | ||
4fdb80f2 GM |
1142 | /* Return the next character from STR which is MAXLEN bytes long. |
1143 | Return in *LEN the length of the character. This is like | |
1144 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1145 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1146 | character. */ |
1147 | ||
1148 | static INLINE int | |
7a5b8a93 | 1149 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 1150 | unsigned char *str; |
7a5b8a93 | 1151 | int maxlen, *len; |
4fdb80f2 GM |
1152 | { |
1153 | int c; | |
1154 | ||
1155 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1156 | if (!CHAR_VALID_P (c, 1)) | |
1157 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1158 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1159 | characters. */ |
1160 | c = '?'; | |
1161 | ||
1162 | return c; | |
1163 | } | |
1164 | ||
1165 | ||
1166 | ||
5f5c8ee5 GM |
1167 | /* Given a position POS containing a valid character and byte position |
1168 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1169 | ||
1170 | static struct text_pos | |
1171 | string_pos_nchars_ahead (pos, string, nchars) | |
1172 | struct text_pos pos; | |
1173 | Lisp_Object string; | |
1174 | int nchars; | |
0b1005ef | 1175 | { |
5f5c8ee5 GM |
1176 | xassert (STRINGP (string) && nchars >= 0); |
1177 | ||
1178 | if (STRING_MULTIBYTE (string)) | |
1179 | { | |
2051c264 GM |
1180 | int rest = SBYTES (string) - BYTEPOS (pos); |
1181 | unsigned char *p = SDATA (string) + BYTEPOS (pos); | |
5f5c8ee5 GM |
1182 | int len; |
1183 | ||
1184 | while (nchars--) | |
1185 | { | |
4fdb80f2 | 1186 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1187 | p += len, rest -= len; |
1188 | xassert (rest >= 0); | |
1189 | CHARPOS (pos) += 1; | |
1190 | BYTEPOS (pos) += len; | |
1191 | } | |
1192 | } | |
1193 | else | |
1194 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1195 | ||
1196 | return pos; | |
0a9dc68b RS |
1197 | } |
1198 | ||
0a9dc68b | 1199 | |
5f5c8ee5 GM |
1200 | /* Value is the text position, i.e. character and byte position, |
1201 | for character position CHARPOS in STRING. */ | |
1202 | ||
1203 | static INLINE struct text_pos | |
1204 | string_pos (charpos, string) | |
1205 | int charpos; | |
0a9dc68b | 1206 | Lisp_Object string; |
0a9dc68b | 1207 | { |
5f5c8ee5 GM |
1208 | struct text_pos pos; |
1209 | xassert (STRINGP (string)); | |
1210 | xassert (charpos >= 0); | |
1211 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1212 | return pos; | |
1213 | } | |
1214 | ||
1215 | ||
1216 | /* Value is a text position, i.e. character and byte position, for | |
1217 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1218 | means recognize multibyte characters. */ | |
1219 | ||
1220 | static struct text_pos | |
1221 | c_string_pos (charpos, s, multibyte_p) | |
1222 | int charpos; | |
1223 | unsigned char *s; | |
1224 | int multibyte_p; | |
1225 | { | |
1226 | struct text_pos pos; | |
1227 | ||
1228 | xassert (s != NULL); | |
1229 | xassert (charpos >= 0); | |
1230 | ||
1231 | if (multibyte_p) | |
0a9dc68b | 1232 | { |
5f5c8ee5 GM |
1233 | int rest = strlen (s), len; |
1234 | ||
1235 | SET_TEXT_POS (pos, 0, 0); | |
1236 | while (charpos--) | |
0a9dc68b | 1237 | { |
4fdb80f2 | 1238 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1239 | s += len, rest -= len; |
1240 | xassert (rest >= 0); | |
1241 | CHARPOS (pos) += 1; | |
1242 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1243 | } |
1244 | } | |
5f5c8ee5 GM |
1245 | else |
1246 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1247 | |
5f5c8ee5 GM |
1248 | return pos; |
1249 | } | |
0a9dc68b | 1250 | |
0a9dc68b | 1251 | |
5f5c8ee5 GM |
1252 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1253 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1254 | |
5f5c8ee5 GM |
1255 | static int |
1256 | number_of_chars (s, multibyte_p) | |
1257 | unsigned char *s; | |
1258 | int multibyte_p; | |
1259 | { | |
1260 | int nchars; | |
1261 | ||
1262 | if (multibyte_p) | |
1263 | { | |
1264 | int rest = strlen (s), len; | |
1265 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1266 | |
5f5c8ee5 GM |
1267 | for (nchars = 0; rest > 0; ++nchars) |
1268 | { | |
4fdb80f2 | 1269 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1270 | rest -= len, p += len; |
0a9dc68b RS |
1271 | } |
1272 | } | |
5f5c8ee5 GM |
1273 | else |
1274 | nchars = strlen (s); | |
1275 | ||
1276 | return nchars; | |
0b1005ef KH |
1277 | } |
1278 | ||
5f5c8ee5 GM |
1279 | |
1280 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1281 | NEWPOS->charpos. POS is a known position in string STRING. | |
1282 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1283 | |
5f5c8ee5 GM |
1284 | static void |
1285 | compute_string_pos (newpos, pos, string) | |
1286 | struct text_pos *newpos, pos; | |
1287 | Lisp_Object string; | |
76412d64 | 1288 | { |
5f5c8ee5 GM |
1289 | xassert (STRINGP (string)); |
1290 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1291 | ||
1292 | if (STRING_MULTIBYTE (string)) | |
6fc556fd KR |
1293 | *newpos = string_pos_nchars_ahead (pos, string, |
1294 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1295 | else |
1296 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1297 | } |
1298 | ||
9c74a0dd | 1299 | |
5f5c8ee5 GM |
1300 | \f |
1301 | /*********************************************************************** | |
1302 | Lisp form evaluation | |
1303 | ***********************************************************************/ | |
1304 | ||
116d6f5c | 1305 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
1306 | |
1307 | static Lisp_Object | |
116d6f5c | 1308 | safe_eval_handler (arg) |
5f5c8ee5 GM |
1309 | Lisp_Object arg; |
1310 | { | |
0dbf9fd2 | 1311 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
1312 | return Qnil; |
1313 | } | |
1314 | ||
1315 | ||
1316 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 1317 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 1318 | |
71e5b1b8 | 1319 | Lisp_Object |
116d6f5c | 1320 | safe_eval (sexpr) |
5f5c8ee5 GM |
1321 | Lisp_Object sexpr; |
1322 | { | |
5f5c8ee5 | 1323 | Lisp_Object val; |
30a3f61c GM |
1324 | |
1325 | if (inhibit_eval_during_redisplay) | |
1326 | val = Qnil; | |
1327 | else | |
1328 | { | |
1329 | int count = BINDING_STACK_SIZE (); | |
1330 | struct gcpro gcpro1; | |
0d8b31c0 | 1331 | |
30a3f61c GM |
1332 | GCPRO1 (sexpr); |
1333 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1334 | /* Use Qt to ensure debugger does not run, |
1335 | so there is no possibility of wanting to redisplay. */ | |
1336 | val = internal_condition_case_1 (Feval, sexpr, Qt, | |
30a3f61c GM |
1337 | safe_eval_handler); |
1338 | UNGCPRO; | |
1339 | val = unbind_to (count, val); | |
1340 | } | |
1341 | ||
1342 | return val; | |
0d8b31c0 GM |
1343 | } |
1344 | ||
1345 | ||
1346 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
1347 | Return the result, or nil if something went wrong. Prevent |
1348 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
1349 | |
1350 | Lisp_Object | |
116d6f5c | 1351 | safe_call (nargs, args) |
0d8b31c0 GM |
1352 | int nargs; |
1353 | Lisp_Object *args; | |
1354 | { | |
0d8b31c0 | 1355 | Lisp_Object val; |
30a3f61c GM |
1356 | |
1357 | if (inhibit_eval_during_redisplay) | |
1358 | val = Qnil; | |
1359 | else | |
1360 | { | |
1361 | int count = BINDING_STACK_SIZE (); | |
1362 | struct gcpro gcpro1; | |
0d8b31c0 | 1363 | |
30a3f61c GM |
1364 | GCPRO1 (args[0]); |
1365 | gcpro1.nvars = nargs; | |
1366 | specbind (Qinhibit_redisplay, Qt); | |
7033d6df RS |
1367 | /* Use Qt to ensure debugger does not run, |
1368 | so there is no possibility of wanting to redisplay. */ | |
1369 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qt, | |
30a3f61c GM |
1370 | safe_eval_handler); |
1371 | UNGCPRO; | |
1372 | val = unbind_to (count, val); | |
1373 | } | |
1374 | ||
1375 | return val; | |
5f5c8ee5 GM |
1376 | } |
1377 | ||
1378 | ||
116d6f5c GM |
1379 | /* Call function FN with one argument ARG. |
1380 | Return the result, or nil if something went wrong. */ | |
1381 | ||
1382 | Lisp_Object | |
1383 | safe_call1 (fn, arg) | |
1384 | Lisp_Object fn, arg; | |
1385 | { | |
1386 | Lisp_Object args[2]; | |
1387 | args[0] = fn; | |
1388 | args[1] = arg; | |
1389 | return safe_call (2, args); | |
1390 | } | |
1391 | ||
1392 | ||
5f5c8ee5 GM |
1393 | \f |
1394 | /*********************************************************************** | |
1395 | Debugging | |
1396 | ***********************************************************************/ | |
1397 | ||
1398 | #if 0 | |
1399 | ||
1400 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1401 | This is for debugging. It is too slow to do unconditionally. */ | |
1402 | ||
1403 | static void | |
1404 | check_it (it) | |
1405 | struct it *it; | |
1406 | { | |
1407 | if (it->method == next_element_from_string) | |
a2889657 | 1408 | { |
5f5c8ee5 GM |
1409 | xassert (STRINGP (it->string)); |
1410 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1411 | } | |
1412 | else if (it->method == next_element_from_buffer) | |
1413 | { | |
1414 | /* Check that character and byte positions agree. */ | |
1415 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1416 | } | |
73af359d | 1417 | |
5f5c8ee5 GM |
1418 | if (it->dpvec) |
1419 | xassert (it->current.dpvec_index >= 0); | |
1420 | else | |
1421 | xassert (it->current.dpvec_index < 0); | |
1422 | } | |
1f40cad2 | 1423 | |
5f5c8ee5 GM |
1424 | #define CHECK_IT(IT) check_it ((IT)) |
1425 | ||
1426 | #else /* not 0 */ | |
1427 | ||
1428 | #define CHECK_IT(IT) (void) 0 | |
1429 | ||
1430 | #endif /* not 0 */ | |
1431 | ||
1432 | ||
1433 | #if GLYPH_DEBUG | |
1434 | ||
1435 | /* Check that the window end of window W is what we expect it | |
1436 | to be---the last row in the current matrix displaying text. */ | |
1437 | ||
1438 | static void | |
1439 | check_window_end (w) | |
1440 | struct window *w; | |
1441 | { | |
1442 | if (!MINI_WINDOW_P (w) | |
1443 | && !NILP (w->window_end_valid)) | |
1444 | { | |
1445 | struct glyph_row *row; | |
1446 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1447 | XFASTINT (w->window_end_vpos)), | |
1448 | !row->enabled_p | |
1449 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1450 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1455 | ||
1456 | #else /* not GLYPH_DEBUG */ | |
1457 | ||
1458 | #define CHECK_WINDOW_END(W) (void) 0 | |
1459 | ||
1460 | #endif /* not GLYPH_DEBUG */ | |
1461 | ||
1462 | ||
1463 | \f | |
1464 | /*********************************************************************** | |
1465 | Iterator initialization | |
1466 | ***********************************************************************/ | |
1467 | ||
1468 | /* Initialize IT for displaying current_buffer in window W, starting | |
1469 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1470 | position is specified which is useful when the iterator is assigned | |
1471 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 1472 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
1473 | |
1474 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1475 | will produce glyphs in that row. | |
1476 | ||
1477 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
96d2320f KS |
1478 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID, |
1479 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID for displaying | |
1480 | mode lines, or TOOL_BAR_FACE_ID for displaying the tool-bar. | |
5f5c8ee5 | 1481 | |
96d2320f KS |
1482 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID, |
1483 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID, the iterator | |
1484 | will be initialized to use the corresponding mode line glyph row of | |
1485 | the desired matrix of W. */ | |
5f5c8ee5 GM |
1486 | |
1487 | void | |
1488 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1489 | struct it *it; | |
1490 | struct window *w; | |
1491 | int charpos, bytepos; | |
1492 | struct glyph_row *row; | |
1493 | enum face_id base_face_id; | |
1494 | { | |
1495 | int highlight_region_p; | |
5f5c8ee5 GM |
1496 | |
1497 | /* Some precondition checks. */ | |
1498 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
1499 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
1500 | && charpos <= ZV)); | |
5f5c8ee5 GM |
1501 | |
1502 | /* If face attributes have been changed since the last redisplay, | |
1503 | free realized faces now because they depend on face definitions | |
1504 | that might have changed. */ | |
1505 | if (face_change_count) | |
1506 | { | |
1507 | face_change_count = 0; | |
1508 | free_all_realized_faces (Qnil); | |
1509 | } | |
1510 | ||
1511 | /* Use one of the mode line rows of W's desired matrix if | |
1512 | appropriate. */ | |
1513 | if (row == NULL) | |
1514 | { | |
96d2320f KS |
1515 | if (base_face_id == MODE_LINE_FACE_ID |
1516 | || base_face_id == MODE_LINE_INACTIVE_FACE_ID) | |
5f5c8ee5 | 1517 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); |
045dee35 GM |
1518 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1519 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1520 | } |
1521 | ||
1522 | /* Clear IT. */ | |
1523 | bzero (it, sizeof *it); | |
1524 | it->current.overlay_string_index = -1; | |
1525 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1526 | it->base_face_id = base_face_id; |
1527 | ||
1528 | /* The window in which we iterate over current_buffer: */ | |
1529 | XSETWINDOW (it->window, w); | |
1530 | it->w = w; | |
1531 | it->f = XFRAME (w->frame); | |
1532 | ||
d475bcb8 GM |
1533 | /* Extra space between lines (on window systems only). */ |
1534 | if (base_face_id == DEFAULT_FACE_ID | |
1535 | && FRAME_WINDOW_P (it->f)) | |
1536 | { | |
1537 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1538 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1539 | else if (it->f->extra_line_spacing > 0) | |
1540 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1541 | } | |
1542 | ||
5f5c8ee5 | 1543 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
1544 | attribute changes of named faces, recompute them. When running |
1545 | in batch mode, the face cache of Vterminal_frame is null. If | |
1546 | we happen to get called, make a dummy face cache. */ | |
9010e6b1 AI |
1547 | if ( |
1548 | #ifndef WINDOWSNT | |
1549 | noninteractive && | |
1550 | #endif | |
1551 | FRAME_FACE_CACHE (it->f) == NULL) | |
62be9979 | 1552 | init_frame_faces (it->f); |
5f5c8ee5 GM |
1553 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
1554 | recompute_basic_faces (it->f); | |
1555 | ||
5f5c8ee5 GM |
1556 | /* Current value of the `space-width', and 'height' properties. */ |
1557 | it->space_width = Qnil; | |
1558 | it->font_height = Qnil; | |
1559 | ||
1560 | /* Are control characters displayed as `^C'? */ | |
1561 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1562 | ||
1563 | /* -1 means everything between a CR and the following line end | |
1564 | is invisible. >0 means lines indented more than this value are | |
1565 | invisible. */ | |
1566 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1567 | ? XFASTINT (current_buffer->selective_display) | |
1568 | : (!NILP (current_buffer->selective_display) | |
1569 | ? -1 : 0)); | |
1570 | it->selective_display_ellipsis_p | |
1571 | = !NILP (current_buffer->selective_display_ellipses); | |
1572 | ||
1573 | /* Display table to use. */ | |
1574 | it->dp = window_display_table (w); | |
1575 | ||
1576 | /* Are multibyte characters enabled in current_buffer? */ | |
1577 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1578 | ||
1579 | /* Non-zero if we should highlight the region. */ | |
1580 | highlight_region_p | |
3ebf0ea9 | 1581 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
1582 | && !NILP (current_buffer->mark_active) |
1583 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1584 | ||
1585 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1586 | start and end of a visible region in window IT->w. Set both to | |
1587 | -1 to indicate no region. */ | |
1588 | if (highlight_region_p | |
1589 | /* Maybe highlight only in selected window. */ | |
1590 | && (/* Either show region everywhere. */ | |
1591 | highlight_nonselected_windows | |
1592 | /* Or show region in the selected window. */ | |
1593 | || w == XWINDOW (selected_window) | |
1594 | /* Or show the region if we are in the mini-buffer and W is | |
1595 | the window the mini-buffer refers to. */ | |
1596 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
5705966b KS |
1597 | && WINDOWP (minibuf_selected_window) |
1598 | && w == XWINDOW (minibuf_selected_window)))) | |
5f5c8ee5 GM |
1599 | { |
1600 | int charpos = marker_position (current_buffer->mark); | |
1601 | it->region_beg_charpos = min (PT, charpos); | |
1602 | it->region_end_charpos = max (PT, charpos); | |
1603 | } | |
1604 | else | |
1605 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1606 | ||
1607 | /* Get the position at which the redisplay_end_trigger hook should | |
1608 | be run, if it is to be run at all. */ | |
1609 | if (MARKERP (w->redisplay_end_trigger) | |
1610 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1611 | it->redisplay_end_trigger_charpos | |
1612 | = marker_position (w->redisplay_end_trigger); | |
1613 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1614 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1615 | ||
1616 | /* Correct bogus values of tab_width. */ | |
1617 | it->tab_width = XINT (current_buffer->tab_width); | |
1618 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1619 | it->tab_width = 8; | |
1620 | ||
1621 | /* Are lines in the display truncated? */ | |
1622 | it->truncate_lines_p | |
1623 | = (base_face_id != DEFAULT_FACE_ID | |
1624 | || XINT (it->w->hscroll) | |
1625 | || (truncate_partial_width_windows | |
1626 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1627 | || !NILP (current_buffer->truncate_lines)); | |
1628 | ||
1629 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 1630 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
1631 | frames. */ |
1632 | if (!FRAME_WINDOW_P (it->f)) | |
1633 | { | |
1634 | if (it->truncate_lines_p) | |
1635 | { | |
1636 | /* We will need the truncation glyph. */ | |
1637 | xassert (it->glyph_row == NULL); | |
1638 | produce_special_glyphs (it, IT_TRUNCATION); | |
1639 | it->truncation_pixel_width = it->pixel_width; | |
1640 | } | |
1641 | else | |
1642 | { | |
1643 | /* We will need the continuation glyph. */ | |
1644 | xassert (it->glyph_row == NULL); | |
1645 | produce_special_glyphs (it, IT_CONTINUATION); | |
1646 | it->continuation_pixel_width = it->pixel_width; | |
1647 | } | |
1648 | ||
153c2160 | 1649 | /* Reset these values to zero because the produce_special_glyphs |
5f5c8ee5 GM |
1650 | above has changed them. */ |
1651 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1652 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1653 | } |
1654 | ||
1655 | /* Set this after getting the dimensions of truncation and | |
1656 | continuation glyphs, so that we don't produce glyphs when calling | |
1657 | produce_special_glyphs, above. */ | |
1658 | it->glyph_row = row; | |
1659 | it->area = TEXT_AREA; | |
1660 | ||
1661 | /* Get the dimensions of the display area. The display area | |
1662 | consists of the visible window area plus a horizontally scrolled | |
1663 | part to the left of the window. All x-values are relative to the | |
1664 | start of this total display area. */ | |
1665 | if (base_face_id != DEFAULT_FACE_ID) | |
1666 | { | |
1667 | /* Mode lines, menu bar in terminal frames. */ | |
1668 | it->first_visible_x = 0; | |
1669 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1670 | } | |
1671 | else | |
1672 | { | |
1673 | it->first_visible_x | |
1674 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1675 | it->last_visible_x = (it->first_visible_x | |
1676 | + window_box_width (w, TEXT_AREA)); | |
1677 | ||
1678 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1679 | the right margin. Otherwise, leave room for the continuation | |
1680 | glyph(s). Truncation and continuation glyphs are not inserted | |
1681 | for window-based redisplay. */ | |
1682 | if (!FRAME_WINDOW_P (it->f)) | |
1683 | { | |
1684 | if (it->truncate_lines_p) | |
1685 | it->last_visible_x -= it->truncation_pixel_width; | |
1686 | else | |
1687 | it->last_visible_x -= it->continuation_pixel_width; | |
1688 | } | |
1689 | ||
045dee35 GM |
1690 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1691 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1692 | } |
1693 | ||
1694 | /* Leave room for a border glyph. */ | |
1695 | if (!FRAME_WINDOW_P (it->f) | |
1696 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1697 | it->last_visible_x -= 1; | |
1698 | ||
1699 | it->last_visible_y = window_text_bottom_y (w); | |
1700 | ||
1701 | /* For mode lines and alike, arrange for the first glyph having a | |
1702 | left box line if the face specifies a box. */ | |
1703 | if (base_face_id != DEFAULT_FACE_ID) | |
1704 | { | |
1705 | struct face *face; | |
1706 | ||
1707 | it->face_id = base_face_id; | |
1708 | ||
1709 | /* If we have a boxed mode line, make the first character appear | |
1710 | with a left box line. */ | |
1711 | face = FACE_FROM_ID (it->f, base_face_id); | |
1712 | if (face->box != FACE_NO_BOX) | |
1713 | it->start_of_box_run_p = 1; | |
1714 | } | |
1715 | ||
1716 | /* If a buffer position was specified, set the iterator there, | |
1717 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 1718 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
1719 | { |
1720 | it->end_charpos = ZV; | |
1721 | it->face_id = -1; | |
1722 | IT_CHARPOS (*it) = charpos; | |
1723 | ||
1724 | /* Compute byte position if not specified. */ | |
3ebf0ea9 | 1725 | if (bytepos < charpos) |
5f5c8ee5 GM |
1726 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
1727 | else | |
1728 | IT_BYTEPOS (*it) = bytepos; | |
1729 | ||
1730 | /* Compute faces etc. */ | |
1731 | reseat (it, it->current.pos, 1); | |
1732 | } | |
1733 | ||
1734 | CHECK_IT (it); | |
1735 | } | |
1736 | ||
1737 | ||
1738 | /* Initialize IT for the display of window W with window start POS. */ | |
1739 | ||
1740 | void | |
1741 | start_display (it, w, pos) | |
1742 | struct it *it; | |
1743 | struct window *w; | |
1744 | struct text_pos pos; | |
1745 | { | |
5f5c8ee5 | 1746 | struct glyph_row *row; |
045dee35 | 1747 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1748 | |
1749 | row = w->desired_matrix->rows + first_vpos; | |
1750 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
17fdcfc8 GM |
1751 | |
1752 | if (!it->truncate_lines_p) | |
5f5c8ee5 | 1753 | { |
17fdcfc8 GM |
1754 | int start_at_line_beg_p; |
1755 | int first_y = it->current_y; | |
1756 | ||
1757 | /* If window start is not at a line start, skip forward to POS to | |
1758 | get the correct continuation lines width. */ | |
1759 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1760 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1761 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 1762 | { |
17fdcfc8 GM |
1763 | reseat_at_previous_visible_line_start (it); |
1764 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1765 | ||
1766 | /* If lines are continued, this line may end in the middle | |
1767 | of a multi-glyph character (e.g. a control character | |
1768 | displayed as \003, or in the middle of an overlay | |
1769 | string). In this case move_it_to above will not have | |
1770 | taken us to the start of the continuation line but to the | |
1771 | end of the continued line. */ | |
b28cb6ed | 1772 | if (it->current_x > 0) |
5f5c8ee5 | 1773 | { |
b28cb6ed GM |
1774 | if (it->current.dpvec_index >= 0 |
1775 | || it->current.overlay_string_index >= 0) | |
1776 | { | |
cafafe0b | 1777 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
1778 | move_it_in_display_line_to (it, -1, -1, 0); |
1779 | } | |
17fdcfc8 | 1780 | |
b28cb6ed | 1781 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 1782 | } |
b28cb6ed GM |
1783 | |
1784 | /* We're starting a new display line, not affected by the | |
1785 | height of the continued line, so clear the appropriate | |
1786 | fields in the iterator structure. */ | |
1787 | it->max_ascent = it->max_descent = 0; | |
1788 | it->max_phys_ascent = it->max_phys_descent = 0; | |
5f5c8ee5 | 1789 | |
17fdcfc8 GM |
1790 | it->current_y = first_y; |
1791 | it->vpos = 0; | |
1792 | it->current_x = it->hpos = 0; | |
1793 | } | |
5f5c8ee5 GM |
1794 | } |
1795 | ||
1796 | #if 0 /* Don't assert the following because start_display is sometimes | |
1797 | called intentionally with a window start that is not at a | |
1798 | line start. Please leave this code in as a comment. */ | |
1799 | ||
1800 | /* Window start should be on a line start, now. */ | |
1801 | xassert (it->continuation_lines_width | |
1802 | || IT_CHARPOS (it) == BEGV | |
1803 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1804 | #endif /* 0 */ | |
1805 | } | |
1806 | ||
1807 | ||
4bde0ebb GM |
1808 | /* Return 1 if POS is a position in ellipses displayed for invisible |
1809 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 1810 | |
4bde0ebb GM |
1811 | static int |
1812 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 1813 | struct display_pos *pos; |
4bde0ebb | 1814 | struct window *w; |
5f5c8ee5 | 1815 | { |
ac90c44f | 1816 | Lisp_Object prop, window; |
4bde0ebb GM |
1817 | int ellipses_p = 0; |
1818 | int charpos = CHARPOS (pos->pos); | |
ac90c44f GM |
1819 | |
1820 | /* If POS specifies a position in a display vector, this might | |
1821 | be for an ellipsis displayed for invisible text. We won't | |
1822 | get the iterator set up for delivering that ellipsis unless | |
1823 | we make sure that it gets aware of the invisible text. */ | |
1824 | if (pos->dpvec_index >= 0 | |
1825 | && pos->overlay_string_index < 0 | |
1826 | && CHARPOS (pos->string_pos) < 0 | |
1827 | && charpos > BEGV | |
1828 | && (XSETWINDOW (window, w), | |
1829 | prop = Fget_char_property (make_number (charpos), | |
1830 | Qinvisible, window), | |
20fbd925 | 1831 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
1832 | { |
1833 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
1834 | window); | |
8580a4e3 | 1835 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
1836 | } |
1837 | ||
1838 | return ellipses_p; | |
1839 | } | |
1840 | ||
1841 | ||
1842 | /* Initialize IT for stepping through current_buffer in window W, | |
1843 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
1844 | vector/ control character translation position information. Value |
1845 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 1846 | |
47d57b22 | 1847 | static int |
4bde0ebb GM |
1848 | init_from_display_pos (it, w, pos) |
1849 | struct it *it; | |
1850 | struct window *w; | |
1851 | struct display_pos *pos; | |
1852 | { | |
1853 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 1854 | int i, overlay_strings_with_newlines = 0; |
4bde0ebb GM |
1855 | |
1856 | /* If POS specifies a position in a display vector, this might | |
1857 | be for an ellipsis displayed for invisible text. We won't | |
1858 | get the iterator set up for delivering that ellipsis unless | |
1859 | we make sure that it gets aware of the invisible text. */ | |
1860 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
1861 | { | |
1862 | --charpos; | |
1863 | bytepos = 0; | |
ac90c44f GM |
1864 | } |
1865 | ||
5f5c8ee5 GM |
1866 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
1867 | text, so we might end up at a position different from POS. This | |
1868 | is only a problem when POS is a row start after a newline and an | |
1869 | overlay starts there with an after-string, and the overlay has an | |
1870 | invisible property. Since we don't skip invisible text in | |
1871 | display_line and elsewhere immediately after consuming the | |
1872 | newline before the row start, such a POS will not be in a string, | |
1873 | but the call to init_iterator below will move us to the | |
1874 | after-string. */ | |
ac90c44f | 1875 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 1876 | |
47d57b22 | 1877 | for (i = 0; i < it->n_overlay_strings; ++i) |
1e1e5daf | 1878 | { |
2051c264 GM |
1879 | char *s = SDATA (it->overlay_strings[i]); |
1880 | char *e = s + SBYTES (it->overlay_strings[i]); | |
1e1e5daf GM |
1881 | |
1882 | while (s < e && *s != '\n') | |
1883 | ++s; | |
1884 | ||
1885 | if (s < e) | |
1886 | { | |
1887 | overlay_strings_with_newlines = 1; | |
1888 | break; | |
1889 | } | |
1890 | } | |
47d57b22 | 1891 | |
75c5350a GM |
1892 | /* If position is within an overlay string, set up IT to the right |
1893 | overlay string. */ | |
5f5c8ee5 GM |
1894 | if (pos->overlay_string_index >= 0) |
1895 | { | |
1896 | int relative_index; | |
75c5350a GM |
1897 | |
1898 | /* If the first overlay string happens to have a `display' | |
1899 | property for an image, the iterator will be set up for that | |
1900 | image, and we have to undo that setup first before we can | |
1901 | correct the overlay string index. */ | |
1902 | if (it->method == next_element_from_image) | |
1903 | pop_it (it); | |
5f5c8ee5 GM |
1904 | |
1905 | /* We already have the first chunk of overlay strings in | |
1906 | IT->overlay_strings. Load more until the one for | |
1907 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1908 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1909 | { | |
1910 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1911 | it->current.overlay_string_index = 0; | |
1912 | while (n--) | |
1913 | { | |
5a08cbaf | 1914 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
1915 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
1916 | } | |
1917 | } | |
1918 | ||
1919 | it->current.overlay_string_index = pos->overlay_string_index; | |
1920 | relative_index = (it->current.overlay_string_index | |
1921 | % OVERLAY_STRING_CHUNK_SIZE); | |
1922 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 1923 | xassert (STRINGP (it->string)); |
5f5c8ee5 GM |
1924 | it->current.string_pos = pos->string_pos; |
1925 | it->method = next_element_from_string; | |
1926 | } | |
1e1e5daf GM |
1927 | |
1928 | #if 0 /* This is bogus because POS not having an overlay string | |
1929 | position does not mean it's after the string. Example: A | |
1930 | line starting with a before-string and initialization of IT | |
1931 | to the previous row's end position. */ | |
2be8f184 GM |
1932 | else if (it->current.overlay_string_index >= 0) |
1933 | { | |
1934 | /* If POS says we're already after an overlay string ending at | |
1935 | POS, make sure to pop the iterator because it will be in | |
1936 | front of that overlay string. When POS is ZV, we've thereby | |
1937 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
1938 | while (it->sp) |
1939 | pop_it (it); | |
2be8f184 GM |
1940 | it->current.overlay_string_index = -1; |
1941 | it->method = next_element_from_buffer; | |
1942 | if (CHARPOS (pos->pos) == ZV) | |
1943 | it->overlay_strings_at_end_processed_p = 1; | |
1944 | } | |
1e1e5daf | 1945 | #endif /* 0 */ |
2be8f184 GM |
1946 | |
1947 | if (CHARPOS (pos->string_pos) >= 0) | |
5f5c8ee5 GM |
1948 | { |
1949 | /* Recorded position is not in an overlay string, but in another | |
1950 | string. This can only be a string from a `display' property. | |
1951 | IT should already be filled with that string. */ | |
1952 | it->current.string_pos = pos->string_pos; | |
1953 | xassert (STRINGP (it->string)); | |
1954 | } | |
1955 | ||
ac90c44f GM |
1956 | /* Restore position in display vector translations, control |
1957 | character translations or ellipses. */ | |
5f5c8ee5 GM |
1958 | if (pos->dpvec_index >= 0) |
1959 | { | |
ac90c44f GM |
1960 | if (it->dpvec == NULL) |
1961 | get_next_display_element (it); | |
5f5c8ee5 GM |
1962 | xassert (it->dpvec && it->current.dpvec_index == 0); |
1963 | it->current.dpvec_index = pos->dpvec_index; | |
1964 | } | |
1965 | ||
1966 | CHECK_IT (it); | |
47d57b22 | 1967 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
1968 | } |
1969 | ||
1970 | ||
1971 | /* Initialize IT for stepping through current_buffer in window W | |
1972 | starting at ROW->start. */ | |
1973 | ||
1974 | static void | |
1975 | init_to_row_start (it, w, row) | |
1976 | struct it *it; | |
1977 | struct window *w; | |
1978 | struct glyph_row *row; | |
1979 | { | |
1980 | init_from_display_pos (it, w, &row->start); | |
1981 | it->continuation_lines_width = row->continuation_lines_width; | |
1982 | CHECK_IT (it); | |
1983 | } | |
1984 | ||
1985 | ||
1986 | /* Initialize IT for stepping through current_buffer in window W | |
47d57b22 GM |
1987 | starting in the line following ROW, i.e. starting at ROW->end. |
1988 | Value is zero if there are overlay strings with newlines at ROW's | |
1989 | end position. */ | |
5f5c8ee5 | 1990 | |
47d57b22 | 1991 | static int |
5f5c8ee5 GM |
1992 | init_to_row_end (it, w, row) |
1993 | struct it *it; | |
1994 | struct window *w; | |
1995 | struct glyph_row *row; | |
1996 | { | |
47d57b22 GM |
1997 | int success = 0; |
1998 | ||
1999 | if (init_from_display_pos (it, w, &row->end)) | |
2000 | { | |
2001 | if (row->continued_p) | |
2002 | it->continuation_lines_width | |
2003 | = row->continuation_lines_width + row->pixel_width; | |
2004 | CHECK_IT (it); | |
2005 | success = 1; | |
2006 | } | |
2007 | ||
2008 | return success; | |
5f5c8ee5 GM |
2009 | } |
2010 | ||
2011 | ||
2012 | ||
2013 | \f | |
2014 | /*********************************************************************** | |
2015 | Text properties | |
2016 | ***********************************************************************/ | |
2017 | ||
2018 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
2019 | overlay changes. Set IT->stop_charpos to the next position where | |
2020 | to stop. */ | |
2021 | ||
2022 | static void | |
2023 | handle_stop (it) | |
2024 | struct it *it; | |
2025 | { | |
2026 | enum prop_handled handled; | |
2027 | int handle_overlay_change_p = 1; | |
2028 | struct props *p; | |
2029 | ||
2030 | it->dpvec = NULL; | |
2031 | it->current.dpvec_index = -1; | |
2032 | ||
2033 | do | |
2034 | { | |
2035 | handled = HANDLED_NORMALLY; | |
2036 | ||
2037 | /* Call text property handlers. */ | |
2038 | for (p = it_props; p->handler; ++p) | |
2039 | { | |
2040 | handled = p->handler (it); | |
2970b9be | 2041 | |
5f5c8ee5 GM |
2042 | if (handled == HANDLED_RECOMPUTE_PROPS) |
2043 | break; | |
2044 | else if (handled == HANDLED_RETURN) | |
2045 | return; | |
2046 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
2047 | handle_overlay_change_p = 0; | |
2048 | } | |
2049 | ||
2050 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
2051 | { | |
2052 | /* Don't check for overlay strings below when set to deliver | |
2053 | characters from a display vector. */ | |
2054 | if (it->method == next_element_from_display_vector) | |
2055 | handle_overlay_change_p = 0; | |
2056 | ||
2057 | /* Handle overlay changes. */ | |
2058 | if (handle_overlay_change_p) | |
2059 | handled = handle_overlay_change (it); | |
2060 | ||
2061 | /* Determine where to stop next. */ | |
2062 | if (handled == HANDLED_NORMALLY) | |
2063 | compute_stop_pos (it); | |
2064 | } | |
2065 | } | |
2066 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
2067 | } | |
2068 | ||
2069 | ||
2070 | /* Compute IT->stop_charpos from text property and overlay change | |
2071 | information for IT's current position. */ | |
2072 | ||
2073 | static void | |
2074 | compute_stop_pos (it) | |
2075 | struct it *it; | |
2076 | { | |
2077 | register INTERVAL iv, next_iv; | |
2078 | Lisp_Object object, limit, position; | |
2079 | ||
2080 | /* If nowhere else, stop at the end. */ | |
2081 | it->stop_charpos = it->end_charpos; | |
2082 | ||
2083 | if (STRINGP (it->string)) | |
2084 | { | |
2085 | /* Strings are usually short, so don't limit the search for | |
2086 | properties. */ | |
2087 | object = it->string; | |
2088 | limit = Qnil; | |
ac90c44f | 2089 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2090 | } |
2091 | else | |
2092 | { | |
2093 | int charpos; | |
2094 | ||
2095 | /* If next overlay change is in front of the current stop pos | |
2096 | (which is IT->end_charpos), stop there. Note: value of | |
2097 | next_overlay_change is point-max if no overlay change | |
2098 | follows. */ | |
2099 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
2100 | if (charpos < it->stop_charpos) | |
2101 | it->stop_charpos = charpos; | |
2102 | ||
2103 | /* If showing the region, we have to stop at the region | |
2104 | start or end because the face might change there. */ | |
2105 | if (it->region_beg_charpos > 0) | |
2106 | { | |
2107 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
2108 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
2109 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
2110 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
2111 | } | |
2112 | ||
2113 | /* Set up variables for computing the stop position from text | |
2114 | property changes. */ | |
2115 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
2116 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
2117 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
2118 | |
2119 | } | |
2120 | ||
2121 | /* Get the interval containing IT's position. Value is a null | |
2122 | interval if there isn't such an interval. */ | |
2123 | iv = validate_interval_range (object, &position, &position, 0); | |
2124 | if (!NULL_INTERVAL_P (iv)) | |
2125 | { | |
2126 | Lisp_Object values_here[LAST_PROP_IDX]; | |
2127 | struct props *p; | |
2128 | ||
2129 | /* Get properties here. */ | |
2130 | for (p = it_props; p->handler; ++p) | |
2131 | values_here[p->idx] = textget (iv->plist, *p->name); | |
2132 | ||
2133 | /* Look for an interval following iv that has different | |
2134 | properties. */ | |
2135 | for (next_iv = next_interval (iv); | |
2136 | (!NULL_INTERVAL_P (next_iv) | |
2137 | && (NILP (limit) | |
2138 | || XFASTINT (limit) > next_iv->position)); | |
2139 | next_iv = next_interval (next_iv)) | |
2140 | { | |
2141 | for (p = it_props; p->handler; ++p) | |
2142 | { | |
2143 | Lisp_Object new_value; | |
2144 | ||
2145 | new_value = textget (next_iv->plist, *p->name); | |
2146 | if (!EQ (values_here[p->idx], new_value)) | |
2147 | break; | |
2148 | } | |
2149 | ||
2150 | if (p->handler) | |
2151 | break; | |
2152 | } | |
2153 | ||
2154 | if (!NULL_INTERVAL_P (next_iv)) | |
2155 | { | |
2156 | if (INTEGERP (limit) | |
2157 | && next_iv->position >= XFASTINT (limit)) | |
2158 | /* No text property change up to limit. */ | |
2159 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
2160 | else | |
2161 | /* Text properties change in next_iv. */ | |
2162 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | xassert (STRINGP (it->string) | |
2167 | || (it->stop_charpos >= BEGV | |
2168 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
2169 | } | |
2170 | ||
2171 | ||
2172 | /* Return the position of the next overlay change after POS in | |
2173 | current_buffer. Value is point-max if no overlay change | |
2174 | follows. This is like `next-overlay-change' but doesn't use | |
2175 | xmalloc. */ | |
2176 | ||
2177 | static int | |
2178 | next_overlay_change (pos) | |
2179 | int pos; | |
2180 | { | |
2181 | int noverlays; | |
2182 | int endpos; | |
2183 | Lisp_Object *overlays; | |
2184 | int len; | |
2185 | int i; | |
2186 | ||
2187 | /* Get all overlays at the given position. */ | |
2188 | len = 10; | |
2189 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2190 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2191 | if (noverlays > len) |
2192 | { | |
2193 | len = noverlays; | |
2194 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2195 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2196 | } |
2197 | ||
2198 | /* If any of these overlays ends before endpos, | |
2199 | use its ending point instead. */ | |
2200 | for (i = 0; i < noverlays; ++i) | |
2201 | { | |
2202 | Lisp_Object oend; | |
2203 | int oendpos; | |
2204 | ||
2205 | oend = OVERLAY_END (overlays[i]); | |
2206 | oendpos = OVERLAY_POSITION (oend); | |
2207 | endpos = min (endpos, oendpos); | |
2208 | } | |
2209 | ||
2210 | return endpos; | |
2211 | } | |
2212 | ||
2213 | ||
2214 | \f | |
2215 | /*********************************************************************** | |
2216 | Fontification | |
2217 | ***********************************************************************/ | |
2218 | ||
2219 | /* Handle changes in the `fontified' property of the current buffer by | |
2220 | calling hook functions from Qfontification_functions to fontify | |
2221 | regions of text. */ | |
2222 | ||
2223 | static enum prop_handled | |
2224 | handle_fontified_prop (it) | |
2225 | struct it *it; | |
2226 | { | |
2227 | Lisp_Object prop, pos; | |
2228 | enum prop_handled handled = HANDLED_NORMALLY; | |
2229 | ||
2230 | /* Get the value of the `fontified' property at IT's current buffer | |
2231 | position. (The `fontified' property doesn't have a special | |
2232 | meaning in strings.) If the value is nil, call functions from | |
2233 | Qfontification_functions. */ | |
2234 | if (!STRINGP (it->string) | |
2235 | && it->s == NULL | |
2236 | && !NILP (Vfontification_functions) | |
085536c2 | 2237 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
2238 | && (pos = make_number (IT_CHARPOS (*it)), |
2239 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
2240 | NILP (prop))) | |
2241 | { | |
2d27dae2 | 2242 | int count = BINDING_STACK_SIZE (); |
085536c2 GM |
2243 | Lisp_Object val; |
2244 | ||
2245 | val = Vfontification_functions; | |
2246 | specbind (Qfontification_functions, Qnil); | |
085536c2 GM |
2247 | |
2248 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
116d6f5c | 2249 | safe_call1 (val, pos); |
085536c2 GM |
2250 | else |
2251 | { | |
2252 | Lisp_Object globals, fn; | |
2253 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 2254 | |
085536c2 GM |
2255 | globals = Qnil; |
2256 | GCPRO2 (val, globals); | |
2257 | ||
2258 | for (; CONSP (val); val = XCDR (val)) | |
2259 | { | |
2260 | fn = XCAR (val); | |
2261 | ||
2262 | if (EQ (fn, Qt)) | |
2263 | { | |
2264 | /* A value of t indicates this hook has a local | |
2265 | binding; it means to run the global binding too. | |
2266 | In a global value, t should not occur. If it | |
2267 | does, we must ignore it to avoid an endless | |
2268 | loop. */ | |
2269 | for (globals = Fdefault_value (Qfontification_functions); | |
2270 | CONSP (globals); | |
2271 | globals = XCDR (globals)) | |
2272 | { | |
2273 | fn = XCAR (globals); | |
2274 | if (!EQ (fn, Qt)) | |
116d6f5c | 2275 | safe_call1 (fn, pos); |
085536c2 GM |
2276 | } |
2277 | } | |
2278 | else | |
116d6f5c | 2279 | safe_call1 (fn, pos); |
085536c2 GM |
2280 | } |
2281 | ||
2282 | UNGCPRO; | |
2283 | } | |
2284 | ||
2285 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2286 | |
2287 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
2288 | something. This avoids an endless loop if they failed to | |
2289 | fontify the text for which reason ever. */ | |
2290 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
2291 | handled = HANDLED_RECOMPUTE_PROPS; | |
2292 | } | |
2293 | ||
2294 | return handled; | |
2295 | } | |
2296 | ||
2297 | ||
2298 | \f | |
2299 | /*********************************************************************** | |
2300 | Faces | |
2301 | ***********************************************************************/ | |
2302 | ||
2303 | /* Set up iterator IT from face properties at its current position. | |
2304 | Called from handle_stop. */ | |
2305 | ||
2306 | static enum prop_handled | |
2307 | handle_face_prop (it) | |
2308 | struct it *it; | |
2309 | { | |
2310 | int new_face_id, next_stop; | |
2311 | ||
2312 | if (!STRINGP (it->string)) | |
2313 | { | |
2314 | new_face_id | |
2315 | = face_at_buffer_position (it->w, | |
2316 | IT_CHARPOS (*it), | |
2317 | it->region_beg_charpos, | |
2318 | it->region_end_charpos, | |
2319 | &next_stop, | |
2320 | (IT_CHARPOS (*it) | |
2321 | + TEXT_PROP_DISTANCE_LIMIT), | |
2322 | 0); | |
2323 | ||
2324 | /* Is this a start of a run of characters with box face? | |
2325 | Caveat: this can be called for a freshly initialized | |
4b41cebb | 2326 | iterator; face_id is -1 in this case. We know that the new |
5f5c8ee5 GM |
2327 | face will not change until limit, i.e. if the new face has a |
2328 | box, all characters up to limit will have one. But, as | |
2329 | usual, we don't know whether limit is really the end. */ | |
2330 | if (new_face_id != it->face_id) | |
2331 | { | |
2332 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2333 | ||
2334 | /* If new face has a box but old face has not, this is | |
2335 | the start of a run of characters with box, i.e. it has | |
2336 | a shadow on the left side. The value of face_id of the | |
2337 | iterator will be -1 if this is the initial call that gets | |
2338 | the face. In this case, we have to look in front of IT's | |
2339 | position and see whether there is a face != new_face_id. */ | |
2340 | it->start_of_box_run_p | |
2341 | = (new_face->box != FACE_NO_BOX | |
2342 | && (it->face_id >= 0 | |
2343 | || IT_CHARPOS (*it) == BEG | |
2344 | || new_face_id != face_before_it_pos (it))); | |
2345 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2346 | } | |
2347 | } | |
2348 | else | |
2349 | { | |
06a12811 GM |
2350 | int base_face_id, bufpos; |
2351 | ||
2352 | if (it->current.overlay_string_index >= 0) | |
2353 | bufpos = IT_CHARPOS (*it); | |
2354 | else | |
2355 | bufpos = 0; | |
2356 | ||
2357 | /* For strings from a buffer, i.e. overlay strings or strings | |
2358 | from a `display' property, use the face at IT's current | |
2359 | buffer position as the base face to merge with, so that | |
2360 | overlay strings appear in the same face as surrounding | |
2361 | text, unless they specify their own faces. */ | |
2362 | base_face_id = underlying_face_id (it); | |
2363 | ||
2364 | new_face_id = face_at_string_position (it->w, | |
2365 | it->string, | |
2366 | IT_STRING_CHARPOS (*it), | |
2367 | bufpos, | |
2368 | it->region_beg_charpos, | |
2369 | it->region_end_charpos, | |
2370 | &next_stop, | |
5de7c6f2 | 2371 | base_face_id, 0); |
5f5c8ee5 GM |
2372 | |
2373 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
2374 | /* If IT is used to display a mode line we would really like to | |
2375 | use the mode line face instead of the frame's default face. */ | |
2376 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2377 | && new_face_id == DEFAULT_FACE_ID) | |
96d2320f | 2378 | new_face_id = CURRENT_MODE_LINE_FACE_ID (it->w); |
5f5c8ee5 GM |
2379 | #endif |
2380 | ||
2381 | /* Is this a start of a run of characters with box? Caveat: | |
2382 | this can be called for a freshly allocated iterator; face_id | |
2383 | is -1 is this case. We know that the new face will not | |
2384 | change until the next check pos, i.e. if the new face has a | |
2385 | box, all characters up to that position will have a | |
2386 | box. But, as usual, we don't know whether that position | |
2387 | is really the end. */ | |
2388 | if (new_face_id != it->face_id) | |
2389 | { | |
2390 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2391 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2392 | ||
2393 | /* If new face has a box but old face hasn't, this is the | |
2394 | start of a run of characters with box, i.e. it has a | |
2395 | shadow on the left side. */ | |
2396 | it->start_of_box_run_p | |
2397 | = new_face->box && (old_face == NULL || !old_face->box); | |
2398 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2399 | } | |
2400 | } | |
2401 | ||
2402 | it->face_id = new_face_id; | |
5f5c8ee5 GM |
2403 | return HANDLED_NORMALLY; |
2404 | } | |
2405 | ||
2406 | ||
06a12811 GM |
2407 | /* Return the ID of the face ``underlying'' IT's current position, |
2408 | which is in a string. If the iterator is associated with a | |
2409 | buffer, return the face at IT's current buffer position. | |
2410 | Otherwise, use the iterator's base_face_id. */ | |
2411 | ||
2412 | static int | |
2413 | underlying_face_id (it) | |
2414 | struct it *it; | |
2415 | { | |
2416 | int face_id = it->base_face_id, i; | |
2417 | ||
2418 | xassert (STRINGP (it->string)); | |
2419 | ||
2420 | for (i = it->sp - 1; i >= 0; --i) | |
2421 | if (NILP (it->stack[i].string)) | |
2422 | face_id = it->stack[i].face_id; | |
2423 | ||
2424 | return face_id; | |
2425 | } | |
2426 | ||
2427 | ||
5f5c8ee5 GM |
2428 | /* Compute the face one character before or after the current position |
2429 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2430 | position. Value is the id of the face. */ | |
2431 | ||
2432 | static int | |
2433 | face_before_or_after_it_pos (it, before_p) | |
2434 | struct it *it; | |
2435 | int before_p; | |
2436 | { | |
2437 | int face_id, limit; | |
2438 | int next_check_charpos; | |
2439 | struct text_pos pos; | |
2440 | ||
2441 | xassert (it->s == NULL); | |
2442 | ||
2443 | if (STRINGP (it->string)) | |
2444 | { | |
06a12811 GM |
2445 | int bufpos, base_face_id; |
2446 | ||
5f5c8ee5 GM |
2447 | /* No face change past the end of the string (for the case |
2448 | we are padding with spaces). No face change before the | |
2449 | string start. */ | |
2051c264 | 2450 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string) |
5f5c8ee5 GM |
2451 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) |
2452 | return it->face_id; | |
2453 | ||
2454 | /* Set pos to the position before or after IT's current position. */ | |
2455 | if (before_p) | |
2456 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2457 | else | |
260a86a0 KH |
2458 | /* For composition, we must check the character after the |
2459 | composition. */ | |
2460 | pos = (it->what == IT_COMPOSITION | |
2461 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2462 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 2463 | |
06a12811 GM |
2464 | if (it->current.overlay_string_index >= 0) |
2465 | bufpos = IT_CHARPOS (*it); | |
2466 | else | |
2467 | bufpos = 0; | |
2468 | ||
2469 | base_face_id = underlying_face_id (it); | |
2470 | ||
5f5c8ee5 | 2471 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
2472 | face_id = face_at_string_position (it->w, |
2473 | it->string, | |
2474 | CHARPOS (pos), | |
2475 | bufpos, | |
2476 | it->region_beg_charpos, | |
2477 | it->region_end_charpos, | |
2478 | &next_check_charpos, | |
5de7c6f2 | 2479 | base_face_id, 0); |
5f5c8ee5 GM |
2480 | |
2481 | /* Correct the face for charsets different from ASCII. Do it | |
2482 | for the multibyte case only. The face returned above is | |
2483 | suitable for unibyte text if IT->string is unibyte. */ | |
2484 | if (STRING_MULTIBYTE (it->string)) | |
2485 | { | |
2051c264 GM |
2486 | unsigned char *p = SDATA (it->string) + BYTEPOS (pos); |
2487 | int rest = SBYTES (it->string) - BYTEPOS (pos); | |
980806b6 KH |
2488 | int c, len; |
2489 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
5f5c8ee5 | 2490 | |
4fdb80f2 | 2491 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2492 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2493 | } |
2494 | } | |
2495 | else | |
2496 | { | |
70851746 GM |
2497 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2498 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2499 | return it->face_id; | |
2500 | ||
5f5c8ee5 GM |
2501 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2502 | pos = it->current.pos; | |
2503 | ||
2504 | if (before_p) | |
c1005d06 | 2505 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2506 | else |
260a86a0 KH |
2507 | { |
2508 | if (it->what == IT_COMPOSITION) | |
2509 | /* For composition, we must check the position after the | |
2510 | composition. */ | |
2511 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2512 | else | |
c1005d06 | 2513 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2514 | } |
06a12811 | 2515 | |
5f5c8ee5 GM |
2516 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2517 | face_id = face_at_buffer_position (it->w, | |
2518 | CHARPOS (pos), | |
2519 | it->region_beg_charpos, | |
2520 | it->region_end_charpos, | |
2521 | &next_check_charpos, | |
2522 | limit, 0); | |
2523 | ||
2524 | /* Correct the face for charsets different from ASCII. Do it | |
2525 | for the multibyte case only. The face returned above is | |
2526 | suitable for unibyte text if current_buffer is unibyte. */ | |
2527 | if (it->multibyte_p) | |
2528 | { | |
980806b6 KH |
2529 | int c = FETCH_MULTIBYTE_CHAR (CHARPOS (pos)); |
2530 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2531 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2532 | } |
2533 | } | |
2534 | ||
2535 | return face_id; | |
2536 | } | |
2537 | ||
2538 | ||
2539 | \f | |
2540 | /*********************************************************************** | |
2541 | Invisible text | |
2542 | ***********************************************************************/ | |
2543 | ||
2544 | /* Set up iterator IT from invisible properties at its current | |
2545 | position. Called from handle_stop. */ | |
2546 | ||
2547 | static enum prop_handled | |
2548 | handle_invisible_prop (it) | |
2549 | struct it *it; | |
2550 | { | |
2551 | enum prop_handled handled = HANDLED_NORMALLY; | |
2552 | ||
2553 | if (STRINGP (it->string)) | |
2554 | { | |
2555 | extern Lisp_Object Qinvisible; | |
2556 | Lisp_Object prop, end_charpos, limit, charpos; | |
2557 | ||
2558 | /* Get the value of the invisible text property at the | |
2559 | current position. Value will be nil if there is no such | |
2560 | property. */ | |
ac90c44f | 2561 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2562 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
2563 | ||
eadc0bf8 GM |
2564 | if (!NILP (prop) |
2565 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2566 | { |
2567 | handled = HANDLED_RECOMPUTE_PROPS; | |
2568 | ||
2569 | /* Get the position at which the next change of the | |
2570 | invisible text property can be found in IT->string. | |
2571 | Value will be nil if the property value is the same for | |
2572 | all the rest of IT->string. */ | |
2051c264 | 2573 | XSETINT (limit, SCHARS (it->string)); |
5f5c8ee5 | 2574 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, |
2051c264 | 2575 | it->string, limit); |
5f5c8ee5 GM |
2576 | |
2577 | /* Text at current position is invisible. The next | |
2578 | change in the property is at position end_charpos. | |
2579 | Move IT's current position to that position. */ | |
2580 | if (INTEGERP (end_charpos) | |
2581 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2582 | { | |
2583 | struct text_pos old; | |
2584 | old = it->current.string_pos; | |
2585 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2586 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2587 | } | |
2588 | else | |
2589 | { | |
2590 | /* The rest of the string is invisible. If this is an | |
2591 | overlay string, proceed with the next overlay string | |
2592 | or whatever comes and return a character from there. */ | |
2593 | if (it->current.overlay_string_index >= 0) | |
2594 | { | |
2595 | next_overlay_string (it); | |
2596 | /* Don't check for overlay strings when we just | |
2597 | finished processing them. */ | |
2598 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2599 | } | |
2600 | else | |
2601 | { | |
2051c264 GM |
2602 | IT_STRING_CHARPOS (*it) = SCHARS (it->string); |
2603 | IT_STRING_BYTEPOS (*it) = SBYTES (it->string); | |
5f5c8ee5 GM |
2604 | } |
2605 | } | |
2606 | } | |
2607 | } | |
2608 | else | |
2609 | { | |
8580a4e3 | 2610 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 2611 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
2612 | |
2613 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 2614 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 2615 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
2616 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
2617 | &overlay); | |
8580a4e3 SM |
2618 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
2619 | ||
5f5c8ee5 | 2620 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 2621 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
2622 | { |
2623 | /* Record whether we have to display an ellipsis for the | |
2624 | invisible text. */ | |
8580a4e3 | 2625 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
2626 | |
2627 | handled = HANDLED_RECOMPUTE_PROPS; | |
2628 | ||
2629 | /* Loop skipping over invisible text. The loop is left at | |
2630 | ZV or with IT on the first char being visible again. */ | |
2631 | do | |
2632 | { | |
2633 | /* Try to skip some invisible text. Return value is the | |
2634 | position reached which can be equal to IT's position | |
2635 | if there is nothing invisible here. This skips both | |
2636 | over invisible text properties and overlays with | |
2637 | invisible property. */ | |
2638 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2639 | &next_stop, ZV, it->window); | |
2640 | ||
2641 | /* If we skipped nothing at all we weren't at invisible | |
2642 | text in the first place. If everything to the end of | |
2643 | the buffer was skipped, end the loop. */ | |
2644 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 2645 | invis_p = 0; |
5f5c8ee5 GM |
2646 | else |
2647 | { | |
2648 | /* We skipped some characters but not necessarily | |
2649 | all there are. Check if we ended up on visible | |
2650 | text. Fget_char_property returns the property of | |
2651 | the char before the given position, i.e. if we | |
8580a4e3 | 2652 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 2653 | newpos is visible. */ |
ac90c44f | 2654 | pos = make_number (newpos); |
5f5c8ee5 | 2655 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 2656 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 GM |
2657 | } |
2658 | ||
2659 | /* If we ended up on invisible text, proceed to | |
2660 | skip starting with next_stop. */ | |
8580a4e3 | 2661 | if (invis_p) |
5f5c8ee5 GM |
2662 | IT_CHARPOS (*it) = next_stop; |
2663 | } | |
8580a4e3 | 2664 | while (invis_p); |
5a08cbaf | 2665 | |
5f5c8ee5 GM |
2666 | /* The position newpos is now either ZV or on visible text. */ |
2667 | IT_CHARPOS (*it) = newpos; | |
2668 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2669 | ||
5a08cbaf GM |
2670 | /* If there are before-strings at the start of invisible |
2671 | text, and the text is invisible because of a text | |
2672 | property, arrange to show before-strings because 20.x did | |
2673 | it that way. (If the text is invisible because of an | |
2674 | overlay property instead of a text property, this is | |
2675 | already handled in the overlay code.) */ | |
2676 | if (NILP (overlay) | |
2677 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 2678 | { |
5a08cbaf GM |
2679 | handled = HANDLED_RECOMPUTE_PROPS; |
2680 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 2681 | } |
5a08cbaf GM |
2682 | else if (display_ellipsis_p) |
2683 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
2684 | } |
2685 | } | |
2686 | ||
2687 | return handled; | |
2688 | } | |
2689 | ||
2690 | ||
5a08cbaf GM |
2691 | /* Make iterator IT return `...' next. */ |
2692 | ||
2693 | static void | |
2694 | setup_for_ellipsis (it) | |
2695 | struct it *it; | |
2696 | { | |
2697 | if (it->dp | |
2698 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2699 | { | |
2700 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2701 | it->dpvec = v->contents; | |
2702 | it->dpend = v->contents + v->size; | |
2703 | } | |
2704 | else | |
2705 | { | |
2706 | /* Default `...'. */ | |
2707 | it->dpvec = default_invis_vector; | |
2708 | it->dpend = default_invis_vector + 3; | |
2709 | } | |
2710 | ||
2711 | /* The ellipsis display does not replace the display of the | |
2712 | character at the new position. Indicate this by setting | |
2713 | IT->dpvec_char_len to zero. */ | |
2714 | it->dpvec_char_len = 0; | |
2715 | ||
2716 | it->current.dpvec_index = 0; | |
2717 | it->method = next_element_from_display_vector; | |
2718 | } | |
2719 | ||
2720 | ||
5f5c8ee5 GM |
2721 | \f |
2722 | /*********************************************************************** | |
2723 | 'display' property | |
2724 | ***********************************************************************/ | |
2725 | ||
2726 | /* Set up iterator IT from `display' property at its current position. | |
2727 | Called from handle_stop. */ | |
2728 | ||
2729 | static enum prop_handled | |
2730 | handle_display_prop (it) | |
2731 | struct it *it; | |
2732 | { | |
2733 | Lisp_Object prop, object; | |
2734 | struct text_pos *position; | |
a61b7058 | 2735 | int display_replaced_p = 0; |
5f5c8ee5 GM |
2736 | |
2737 | if (STRINGP (it->string)) | |
2738 | { | |
2739 | object = it->string; | |
2740 | position = &it->current.string_pos; | |
2741 | } | |
2742 | else | |
2743 | { | |
221dd3e7 | 2744 | object = it->w->buffer; |
5f5c8ee5 GM |
2745 | position = &it->current.pos; |
2746 | } | |
2747 | ||
2748 | /* Reset those iterator values set from display property values. */ | |
2749 | it->font_height = Qnil; | |
2750 | it->space_width = Qnil; | |
2751 | it->voffset = 0; | |
2752 | ||
2753 | /* We don't support recursive `display' properties, i.e. string | |
2754 | values that have a string `display' property, that have a string | |
2755 | `display' property etc. */ | |
2756 | if (!it->string_from_display_prop_p) | |
2757 | it->area = TEXT_AREA; | |
2758 | ||
2759 | prop = Fget_char_property (make_number (position->charpos), | |
2760 | Qdisplay, object); | |
2761 | if (NILP (prop)) | |
2762 | return HANDLED_NORMALLY; | |
2763 | ||
f3751a65 | 2764 | if (CONSP (prop) |
12700f40 GM |
2765 | /* Simple properties. */ |
2766 | && !EQ (XCAR (prop), Qimage) | |
2767 | && !EQ (XCAR (prop), Qspace) | |
2768 | && !EQ (XCAR (prop), Qwhen) | |
2769 | && !EQ (XCAR (prop), Qspace_width) | |
2770 | && !EQ (XCAR (prop), Qheight) | |
2771 | && !EQ (XCAR (prop), Qraise) | |
2772 | /* Marginal area specifications. */ | |
2773 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
2774 | && !NILP (XCAR (prop))) | |
5f5c8ee5 | 2775 | { |
a61b7058 | 2776 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 2777 | { |
a61b7058 GM |
2778 | if (handle_single_display_prop (it, XCAR (prop), object, |
2779 | position, display_replaced_p)) | |
2780 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2781 | } |
2782 | } | |
2783 | else if (VECTORP (prop)) | |
2784 | { | |
2785 | int i; | |
a61b7058 GM |
2786 | for (i = 0; i < ASIZE (prop); ++i) |
2787 | if (handle_single_display_prop (it, AREF (prop, i), object, | |
2788 | position, display_replaced_p)) | |
2789 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2790 | } |
2791 | else | |
2792 | { | |
a61b7058 GM |
2793 | if (handle_single_display_prop (it, prop, object, position, 0)) |
2794 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2795 | } |
2796 | ||
a61b7058 | 2797 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
2798 | } |
2799 | ||
2800 | ||
6c577098 | 2801 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2802 | at START_POS in OBJECT. */ |
2803 | ||
2804 | static struct text_pos | |
2805 | display_prop_end (it, object, start_pos) | |
2806 | struct it *it; | |
2807 | Lisp_Object object; | |
2808 | struct text_pos start_pos; | |
2809 | { | |
2810 | Lisp_Object end; | |
2811 | struct text_pos end_pos; | |
5f5c8ee5 | 2812 | |
016b5642 MB |
2813 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
2814 | Qdisplay, object, Qnil); | |
6c577098 GM |
2815 | CHARPOS (end_pos) = XFASTINT (end); |
2816 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2817 | compute_string_pos (&end_pos, start_pos, it->string); |
2818 | else | |
6c577098 | 2819 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2820 | |
2821 | return end_pos; | |
2822 | } | |
2823 | ||
2824 | ||
2825 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2826 | is the object in which the `display' property was found. *POSITION | |
a61b7058 GM |
2827 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
2828 | means that we previously saw a display sub-property which already | |
2829 | replaced text display with something else, for example an image; | |
2830 | ignore such properties after the first one has been processed. | |
5f5c8ee5 GM |
2831 | |
2832 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2833 | end position of the `display' property. | |
2834 | ||
4b41cebb | 2835 | Value is non-zero if something was found which replaces the display |
a61b7058 | 2836 | of buffer or string text. */ |
5f5c8ee5 GM |
2837 | |
2838 | static int | |
a61b7058 GM |
2839 | handle_single_display_prop (it, prop, object, position, |
2840 | display_replaced_before_p) | |
5f5c8ee5 GM |
2841 | struct it *it; |
2842 | Lisp_Object prop; | |
2843 | Lisp_Object object; | |
2844 | struct text_pos *position; | |
a61b7058 | 2845 | int display_replaced_before_p; |
5f5c8ee5 GM |
2846 | { |
2847 | Lisp_Object value; | |
a61b7058 | 2848 | int replaces_text_display_p = 0; |
5f5c8ee5 GM |
2849 | Lisp_Object form; |
2850 | ||
d3acf96b | 2851 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
4b41cebb | 2852 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2853 | form = Qt; |
d3acf96b | 2854 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2855 | { |
2856 | prop = XCDR (prop); | |
2857 | if (!CONSP (prop)) | |
2858 | return 0; | |
2859 | form = XCAR (prop); | |
2860 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2861 | } |
2862 | ||
2863 | if (!NILP (form) && !EQ (form, Qt)) | |
2864 | { | |
b384d6f8 | 2865 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 | 2866 | struct gcpro gcpro1; |
5f5c8ee5 | 2867 | |
b384d6f8 GM |
2868 | /* Bind `object' to the object having the `display' property, a |
2869 | buffer or string. Bind `position' to the position in the | |
2870 | object where the property was found, and `buffer-position' | |
2871 | to the current position in the buffer. */ | |
2872 | specbind (Qobject, object); | |
31ac723b SM |
2873 | specbind (Qposition, make_number (CHARPOS (*position))); |
2874 | specbind (Qbuffer_position, | |
2875 | make_number (STRINGP (object) | |
2876 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 2877 | GCPRO1 (form); |
116d6f5c | 2878 | form = safe_eval (form); |
b384d6f8 GM |
2879 | UNGCPRO; |
2880 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2881 | } |
2882 | ||
2883 | if (NILP (form)) | |
2884 | return 0; | |
2885 | ||
2886 | if (CONSP (prop) | |
2887 | && EQ (XCAR (prop), Qheight) | |
2888 | && CONSP (XCDR (prop))) | |
2889 | { | |
e4093f38 | 2890 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 GM |
2891 | return 0; |
2892 | ||
2893 | /* `(height HEIGHT)'. */ | |
2894 | it->font_height = XCAR (XCDR (prop)); | |
2895 | if (!NILP (it->font_height)) | |
2896 | { | |
2897 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2898 | int new_height = -1; | |
2899 | ||
2900 | if (CONSP (it->font_height) | |
2901 | && (EQ (XCAR (it->font_height), Qplus) | |
2902 | || EQ (XCAR (it->font_height), Qminus)) | |
2903 | && CONSP (XCDR (it->font_height)) | |
2904 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2905 | { | |
2906 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2907 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2908 | if (EQ (XCAR (it->font_height), Qplus)) | |
2909 | steps = - steps; | |
2910 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2911 | } | |
0d8b31c0 | 2912 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
2913 | { |
2914 | /* Call function with current height as argument. | |
2915 | Value is the new height. */ | |
116d6f5c GM |
2916 | Lisp_Object height; |
2917 | height = safe_call1 (it->font_height, | |
2918 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
2919 | if (NUMBERP (height)) |
2920 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
2921 | } |
2922 | else if (NUMBERP (it->font_height)) | |
2923 | { | |
2924 | /* Value is a multiple of the canonical char height. */ | |
2925 | struct face *face; | |
2926 | ||
2927 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2928 | new_height = (XFLOATINT (it->font_height) | |
2929 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2930 | } | |
2931 | else | |
2932 | { | |
2933 | /* Evaluate IT->font_height with `height' bound to the | |
2934 | current specified height to get the new height. */ | |
2935 | Lisp_Object value; | |
2d27dae2 | 2936 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 GM |
2937 | |
2938 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
116d6f5c | 2939 | value = safe_eval (it->font_height); |
5f5c8ee5 GM |
2940 | unbind_to (count, Qnil); |
2941 | ||
2942 | if (NUMBERP (value)) | |
2943 | new_height = XFLOATINT (value); | |
2944 | } | |
2945 | ||
2946 | if (new_height > 0) | |
2947 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2948 | } | |
2949 | } | |
2950 | else if (CONSP (prop) | |
2951 | && EQ (XCAR (prop), Qspace_width) | |
2952 | && CONSP (XCDR (prop))) | |
2953 | { | |
2954 | /* `(space_width WIDTH)'. */ | |
e4093f38 | 2955 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 2956 | return 0; |
5f5c8ee5 GM |
2957 | |
2958 | value = XCAR (XCDR (prop)); | |
2959 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2960 | it->space_width = value; | |
2961 | } | |
2962 | else if (CONSP (prop) | |
2963 | && EQ (XCAR (prop), Qraise) | |
2964 | && CONSP (XCDR (prop))) | |
2965 | { | |
5f5c8ee5 | 2966 | /* `(raise FACTOR)'. */ |
e4093f38 | 2967 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 2968 | return 0; |
5f5c8ee5 | 2969 | |
fb3842a8 | 2970 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
2971 | value = XCAR (XCDR (prop)); |
2972 | if (NUMBERP (value)) | |
2973 | { | |
2974 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2975 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 2976 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
2977 | } |
2978 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2979 | } | |
2980 | else if (!it->string_from_display_prop_p) | |
2981 | { | |
f3751a65 | 2982 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
4b41cebb | 2983 | VALUE) or `((margin nil) VALUE)' or VALUE. */ |
5f5c8ee5 GM |
2984 | Lisp_Object location, value; |
2985 | struct text_pos start_pos; | |
2986 | int valid_p; | |
2987 | ||
2988 | /* Characters having this form of property are not displayed, so | |
2989 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
2990 | start_pos = *position; |
2991 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 2992 | value = Qnil; |
5f5c8ee5 GM |
2993 | |
2994 | /* Let's stop at the new position and assume that all | |
2995 | text properties change there. */ | |
2996 | it->stop_charpos = position->charpos; | |
2997 | ||
f3751a65 GM |
2998 | location = Qunbound; |
2999 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 3000 | { |
f3751a65 GM |
3001 | Lisp_Object tem; |
3002 | ||
5f5c8ee5 | 3003 | value = XCDR (prop); |
f3751a65 GM |
3004 | if (CONSP (value)) |
3005 | value = XCAR (value); | |
3006 | ||
3007 | tem = XCAR (prop); | |
3008 | if (EQ (XCAR (tem), Qmargin) | |
3009 | && (tem = XCDR (tem), | |
3010 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
3011 | (NILP (tem) | |
3012 | || EQ (tem, Qleft_margin) | |
3013 | || EQ (tem, Qright_margin)))) | |
3014 | location = tem; | |
5f5c8ee5 | 3015 | } |
f3751a65 GM |
3016 | |
3017 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
3018 | { |
3019 | location = Qnil; | |
3020 | value = prop; | |
3021 | } | |
3022 | ||
3023 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 3024 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
3025 | valid_p = STRINGP (value); |
3026 | else | |
3027 | valid_p = (STRINGP (value) | |
3028 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3029 | || valid_image_p (value)); | |
3030 | #else /* not HAVE_WINDOW_SYSTEM */ | |
3031 | valid_p = STRINGP (value); | |
3032 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
3033 | ||
3034 | if ((EQ (location, Qleft_margin) | |
3035 | || EQ (location, Qright_margin) | |
3036 | || NILP (location)) | |
a61b7058 GM |
3037 | && valid_p |
3038 | && !display_replaced_before_p) | |
5f5c8ee5 | 3039 | { |
a61b7058 | 3040 | replaces_text_display_p = 1; |
a21a3943 | 3041 | |
5f5c8ee5 GM |
3042 | /* Save current settings of IT so that we can restore them |
3043 | when we are finished with the glyph property value. */ | |
3044 | push_it (it); | |
3045 | ||
3046 | if (NILP (location)) | |
3047 | it->area = TEXT_AREA; | |
3048 | else if (EQ (location, Qleft_margin)) | |
3049 | it->area = LEFT_MARGIN_AREA; | |
3050 | else | |
3051 | it->area = RIGHT_MARGIN_AREA; | |
3052 | ||
3053 | if (STRINGP (value)) | |
3054 | { | |
3055 | it->string = value; | |
3056 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3057 | it->current.overlay_string_index = -1; | |
3058 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2051c264 | 3059 | it->end_charpos = it->string_nchars = SCHARS (it->string); |
5f5c8ee5 GM |
3060 | it->method = next_element_from_string; |
3061 | it->stop_charpos = 0; | |
3062 | it->string_from_display_prop_p = 1; | |
e187cf71 GM |
3063 | /* Say that we haven't consumed the characters with |
3064 | `display' property yet. The call to pop_it in | |
3065 | set_iterator_to_next will clean this up. */ | |
3066 | *position = start_pos; | |
5f5c8ee5 GM |
3067 | } |
3068 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3069 | { | |
3070 | it->method = next_element_from_stretch; | |
3071 | it->object = value; | |
3072 | it->current.pos = it->position = start_pos; | |
3073 | } | |
3074 | #ifdef HAVE_WINDOW_SYSTEM | |
3075 | else | |
3076 | { | |
3077 | it->what = IT_IMAGE; | |
3078 | it->image_id = lookup_image (it->f, value); | |
3079 | it->position = start_pos; | |
3080 | it->object = NILP (object) ? it->w->buffer : object; | |
3081 | it->method = next_element_from_image; | |
3082 | ||
02513cdd | 3083 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
3084 | `display' property yet. The call to pop_it in |
3085 | set_iterator_to_next will clean this up. */ | |
3086 | *position = start_pos; | |
3087 | } | |
3088 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3089 | } | |
a21a3943 GM |
3090 | else |
3091 | /* Invalid property or property not supported. Restore | |
3092 | the position to what it was before. */ | |
3093 | *position = start_pos; | |
5f5c8ee5 GM |
3094 | } |
3095 | ||
a61b7058 | 3096 | return replaces_text_display_p; |
5f5c8ee5 GM |
3097 | } |
3098 | ||
3099 | ||
06568bbf GM |
3100 | /* Check if PROP is a display sub-property value whose text should be |
3101 | treated as intangible. */ | |
3102 | ||
3103 | static int | |
3104 | single_display_prop_intangible_p (prop) | |
3105 | Lisp_Object prop; | |
3106 | { | |
3107 | /* Skip over `when FORM'. */ | |
3108 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3109 | { | |
3110 | prop = XCDR (prop); | |
3111 | if (!CONSP (prop)) | |
3112 | return 0; | |
3113 | prop = XCDR (prop); | |
3114 | } | |
3115 | ||
3116 | if (!CONSP (prop)) | |
3117 | return 0; | |
3118 | ||
3119 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
3120 | we don't need to treat text as intangible. */ | |
3121 | if (EQ (XCAR (prop), Qmargin)) | |
3122 | { | |
3123 | prop = XCDR (prop); | |
3124 | if (!CONSP (prop)) | |
3125 | return 0; | |
3126 | ||
3127 | prop = XCDR (prop); | |
3128 | if (!CONSP (prop) | |
3129 | || EQ (XCAR (prop), Qleft_margin) | |
3130 | || EQ (XCAR (prop), Qright_margin)) | |
3131 | return 0; | |
3132 | } | |
3133 | ||
3134 | return CONSP (prop) && EQ (XCAR (prop), Qimage); | |
3135 | } | |
3136 | ||
3137 | ||
3138 | /* Check if PROP is a display property value whose text should be | |
3139 | treated as intangible. */ | |
3140 | ||
3141 | int | |
3142 | display_prop_intangible_p (prop) | |
3143 | Lisp_Object prop; | |
3144 | { | |
3145 | if (CONSP (prop) | |
3146 | && CONSP (XCAR (prop)) | |
3147 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3148 | { | |
3149 | /* A list of sub-properties. */ | |
3150 | while (CONSP (prop)) | |
3151 | { | |
3152 | if (single_display_prop_intangible_p (XCAR (prop))) | |
3153 | return 1; | |
3154 | prop = XCDR (prop); | |
3155 | } | |
3156 | } | |
3157 | else if (VECTORP (prop)) | |
3158 | { | |
3159 | /* A vector of sub-properties. */ | |
3160 | int i; | |
a61b7058 GM |
3161 | for (i = 0; i < ASIZE (prop); ++i) |
3162 | if (single_display_prop_intangible_p (AREF (prop, i))) | |
06568bbf GM |
3163 | return 1; |
3164 | } | |
3165 | else | |
3166 | return single_display_prop_intangible_p (prop); | |
3167 | ||
3168 | return 0; | |
3169 | } | |
3170 | ||
74bd6d65 GM |
3171 | |
3172 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
3173 | ||
3174 | static int | |
3175 | single_display_prop_string_p (prop, string) | |
3176 | Lisp_Object prop, string; | |
3177 | { | |
74bd6d65 GM |
3178 | if (EQ (string, prop)) |
3179 | return 1; | |
3180 | ||
3181 | /* Skip over `when FORM'. */ | |
3182 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3183 | { | |
3184 | prop = XCDR (prop); | |
3185 | if (!CONSP (prop)) | |
3186 | return 0; | |
3187 | prop = XCDR (prop); | |
3188 | } | |
3189 | ||
3190 | if (CONSP (prop)) | |
3191 | /* Skip over `margin LOCATION'. */ | |
3192 | if (EQ (XCAR (prop), Qmargin)) | |
3193 | { | |
3194 | prop = XCDR (prop); | |
3195 | if (!CONSP (prop)) | |
3196 | return 0; | |
3197 | ||
3198 | prop = XCDR (prop); | |
3199 | if (!CONSP (prop)) | |
3200 | return 0; | |
3201 | } | |
3202 | ||
3203 | return CONSP (prop) && EQ (XCAR (prop), string); | |
3204 | } | |
3205 | ||
3206 | ||
3207 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
3208 | ||
3209 | static int | |
3210 | display_prop_string_p (prop, string) | |
3211 | Lisp_Object prop, string; | |
3212 | { | |
74bd6d65 GM |
3213 | if (CONSP (prop) |
3214 | && CONSP (XCAR (prop)) | |
3215 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3216 | { | |
3217 | /* A list of sub-properties. */ | |
3218 | while (CONSP (prop)) | |
3219 | { | |
3220 | if (single_display_prop_string_p (XCAR (prop), string)) | |
3221 | return 1; | |
3222 | prop = XCDR (prop); | |
3223 | } | |
3224 | } | |
3225 | else if (VECTORP (prop)) | |
3226 | { | |
3227 | /* A vector of sub-properties. */ | |
3228 | int i; | |
3229 | for (i = 0; i < ASIZE (prop); ++i) | |
3230 | if (single_display_prop_string_p (AREF (prop, i), string)) | |
3231 | return 1; | |
3232 | } | |
3233 | else | |
3234 | return single_display_prop_string_p (prop, string); | |
3235 | ||
3236 | return 0; | |
3237 | } | |
3238 | ||
3239 | ||
3240 | /* Determine from which buffer position in W's buffer STRING comes | |
3241 | from. AROUND_CHARPOS is an approximate position where it could | |
3242 | be from. Value is the buffer position or 0 if it couldn't be | |
3243 | determined. | |
3244 | ||
3245 | W's buffer must be current. | |
3246 | ||
3247 | This function is necessary because we don't record buffer positions | |
3248 | in glyphs generated from strings (to keep struct glyph small). | |
3249 | This function may only use code that doesn't eval because it is | |
3250 | called asynchronously from note_mouse_highlight. */ | |
3251 | ||
3252 | int | |
3253 | string_buffer_position (w, string, around_charpos) | |
3254 | struct window *w; | |
3255 | Lisp_Object string; | |
3256 | int around_charpos; | |
3257 | { | |
74bd6d65 GM |
3258 | Lisp_Object limit, prop, pos; |
3259 | const int MAX_DISTANCE = 1000; | |
3260 | int found = 0; | |
3261 | ||
d8731202 | 3262 | pos = make_number (around_charpos); |
74bd6d65 GM |
3263 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
3264 | while (!found && !EQ (pos, limit)) | |
3265 | { | |
3266 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3267 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3268 | found = 1; | |
3269 | else | |
134d9283 | 3270 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
3271 | } |
3272 | ||
3273 | if (!found) | |
3274 | { | |
d8731202 | 3275 | pos = make_number (around_charpos); |
74bd6d65 GM |
3276 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
3277 | while (!found && !EQ (pos, limit)) | |
3278 | { | |
3279 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3280 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3281 | found = 1; | |
3282 | else | |
134d9283 GM |
3283 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
3284 | limit); | |
74bd6d65 GM |
3285 | } |
3286 | } | |
3287 | ||
3288 | return found ? XINT (pos) : 0; | |
3289 | } | |
3290 | ||
3291 | ||
5f5c8ee5 | 3292 | \f |
260a86a0 KH |
3293 | /*********************************************************************** |
3294 | `composition' property | |
3295 | ***********************************************************************/ | |
3296 | ||
3297 | /* Set up iterator IT from `composition' property at its current | |
3298 | position. Called from handle_stop. */ | |
3299 | ||
3300 | static enum prop_handled | |
3301 | handle_composition_prop (it) | |
3302 | struct it *it; | |
3303 | { | |
3304 | Lisp_Object prop, string; | |
3305 | int pos, pos_byte, end; | |
3306 | enum prop_handled handled = HANDLED_NORMALLY; | |
3307 | ||
3308 | if (STRINGP (it->string)) | |
3309 | { | |
3310 | pos = IT_STRING_CHARPOS (*it); | |
3311 | pos_byte = IT_STRING_BYTEPOS (*it); | |
3312 | string = it->string; | |
3313 | } | |
3314 | else | |
3315 | { | |
3316 | pos = IT_CHARPOS (*it); | |
3317 | pos_byte = IT_BYTEPOS (*it); | |
3318 | string = Qnil; | |
3319 | } | |
3320 | ||
3321 | /* If there's a valid composition and point is not inside of the | |
3322 | composition (in the case that the composition is from the current | |
3323 | buffer), draw a glyph composed from the composition components. */ | |
3324 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
3325 | && COMPOSITION_VALID_P (pos, end, prop) | |
3326 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
3327 | { | |
3328 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
3329 | ||
3330 | if (id >= 0) | |
3331 | { | |
3332 | it->method = next_element_from_composition; | |
3333 | it->cmp_id = id; | |
3334 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
3335 | /* For a terminal, draw only the first character of the | |
3336 | components. */ | |
3337 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
3338 | it->len = (STRINGP (it->string) | |
3339 | ? string_char_to_byte (it->string, end) | |
3340 | : CHAR_TO_BYTE (end)) - pos_byte; | |
3341 | it->stop_charpos = end; | |
3342 | handled = HANDLED_RETURN; | |
3343 | } | |
3344 | } | |
3345 | ||
3346 | return handled; | |
3347 | } | |
3348 | ||
3349 | ||
3350 | \f | |
5f5c8ee5 GM |
3351 | /*********************************************************************** |
3352 | Overlay strings | |
3353 | ***********************************************************************/ | |
3354 | ||
3355 | /* The following structure is used to record overlay strings for | |
3356 | later sorting in load_overlay_strings. */ | |
3357 | ||
3358 | struct overlay_entry | |
3359 | { | |
2970b9be | 3360 | Lisp_Object overlay; |
5f5c8ee5 GM |
3361 | Lisp_Object string; |
3362 | int priority; | |
3363 | int after_string_p; | |
3364 | }; | |
3365 | ||
3366 | ||
3367 | /* Set up iterator IT from overlay strings at its current position. | |
3368 | Called from handle_stop. */ | |
3369 | ||
3370 | static enum prop_handled | |
3371 | handle_overlay_change (it) | |
3372 | struct it *it; | |
3373 | { | |
5a08cbaf | 3374 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 3375 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 3376 | else |
2970b9be | 3377 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
3378 | } |
3379 | ||
3380 | ||
3381 | /* Set up the next overlay string for delivery by IT, if there is an | |
3382 | overlay string to deliver. Called by set_iterator_to_next when the | |
3383 | end of the current overlay string is reached. If there are more | |
3384 | overlay strings to display, IT->string and | |
3385 | IT->current.overlay_string_index are set appropriately here. | |
3386 | Otherwise IT->string is set to nil. */ | |
3387 | ||
3388 | static void | |
3389 | next_overlay_string (it) | |
3390 | struct it *it; | |
3391 | { | |
3392 | ++it->current.overlay_string_index; | |
3393 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
3394 | { | |
3395 | /* No more overlay strings. Restore IT's settings to what | |
3396 | they were before overlay strings were processed, and | |
3397 | continue to deliver from current_buffer. */ | |
5a08cbaf GM |
3398 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
3399 | ||
5f5c8ee5 GM |
3400 | pop_it (it); |
3401 | xassert (it->stop_charpos >= BEGV | |
3402 | && it->stop_charpos <= it->end_charpos); | |
3403 | it->string = Qnil; | |
3404 | it->current.overlay_string_index = -1; | |
3405 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
3406 | it->n_overlay_strings = 0; | |
3407 | it->method = next_element_from_buffer; | |
2970b9be GM |
3408 | |
3409 | /* If we're at the end of the buffer, record that we have | |
3410 | processed the overlay strings there already, so that | |
3411 | next_element_from_buffer doesn't try it again. */ | |
3412 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3413 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
3414 | |
3415 | /* If we have to display `...' for invisible text, set | |
3416 | the iterator up for that. */ | |
3417 | if (display_ellipsis_p) | |
3418 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3419 | } |
3420 | else | |
3421 | { | |
3422 | /* There are more overlay strings to process. If | |
3423 | IT->current.overlay_string_index has advanced to a position | |
3424 | where we must load IT->overlay_strings with more strings, do | |
3425 | it. */ | |
3426 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
3427 | ||
3428 | if (it->current.overlay_string_index && i == 0) | |
5a08cbaf | 3429 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
3430 | |
3431 | /* Initialize IT to deliver display elements from the overlay | |
3432 | string. */ | |
3433 | it->string = it->overlay_strings[i]; | |
3434 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3435 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
3436 | it->method = next_element_from_string; | |
3437 | it->stop_charpos = 0; | |
3438 | } | |
3439 | ||
3440 | CHECK_IT (it); | |
3441 | } | |
3442 | ||
3443 | ||
3444 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
3445 | comparison function for qsort in load_overlay_strings. Overlay | |
3446 | strings for the same position are sorted so that | |
3447 | ||
2970b9be GM |
3448 | 1. All after-strings come in front of before-strings, except |
3449 | when they come from the same overlay. | |
5f5c8ee5 GM |
3450 | |
3451 | 2. Within after-strings, strings are sorted so that overlay strings | |
3452 | from overlays with higher priorities come first. | |
3453 | ||
3454 | 2. Within before-strings, strings are sorted so that overlay | |
3455 | strings from overlays with higher priorities come last. | |
3456 | ||
3457 | Value is analogous to strcmp. */ | |
3458 | ||
3459 | ||
3460 | static int | |
3461 | compare_overlay_entries (e1, e2) | |
3462 | void *e1, *e2; | |
3463 | { | |
3464 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
3465 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
3466 | int result; | |
3467 | ||
3468 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
3469 | { |
3470 | /* Let after-strings appear in front of before-strings if | |
3471 | they come from different overlays. */ | |
3472 | if (EQ (entry1->overlay, entry2->overlay)) | |
3473 | result = entry1->after_string_p ? 1 : -1; | |
3474 | else | |
3475 | result = entry1->after_string_p ? -1 : 1; | |
3476 | } | |
5f5c8ee5 GM |
3477 | else if (entry1->after_string_p) |
3478 | /* After-strings sorted in order of decreasing priority. */ | |
3479 | result = entry2->priority - entry1->priority; | |
3480 | else | |
3481 | /* Before-strings sorted in order of increasing priority. */ | |
3482 | result = entry1->priority - entry2->priority; | |
3483 | ||
3484 | return result; | |
3485 | } | |
3486 | ||
3487 | ||
3488 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
3489 | current buffer position, or from CHARPOS if that is > 0. Set |
3490 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
3491 | |
3492 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
3493 | a time. On entry into load_overlay_strings, | |
3494 | IT->current.overlay_string_index gives the number of overlay | |
3495 | strings that have already been loaded by previous calls to this | |
3496 | function. | |
3497 | ||
2970b9be GM |
3498 | IT->add_overlay_start contains an additional overlay start |
3499 | position to consider for taking overlay strings from, if non-zero. | |
3500 | This position comes into play when the overlay has an `invisible' | |
3501 | property, and both before and after-strings. When we've skipped to | |
3502 | the end of the overlay, because of its `invisible' property, we | |
3503 | nevertheless want its before-string to appear. | |
3504 | IT->add_overlay_start will contain the overlay start position | |
3505 | in this case. | |
3506 | ||
5f5c8ee5 GM |
3507 | Overlay strings are sorted so that after-string strings come in |
3508 | front of before-string strings. Within before and after-strings, | |
3509 | strings are sorted by overlay priority. See also function | |
3510 | compare_overlay_entries. */ | |
3511 | ||
3512 | static void | |
5a08cbaf | 3513 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 3514 | struct it *it; |
5a08cbaf | 3515 | int charpos; |
5f5c8ee5 GM |
3516 | { |
3517 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
cafafe0b | 3518 | Lisp_Object ov, overlay, window, str, invisible; |
5f5c8ee5 GM |
3519 | int start, end; |
3520 | int size = 20; | |
cafafe0b | 3521 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
3522 | struct overlay_entry *entries |
3523 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
3524 | |
3525 | if (charpos <= 0) | |
3526 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
3527 | |
3528 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
3529 | `entries' which has size `size' and currently contains `n' | |
3530 | elements. AFTER_P non-zero means STRING is an after-string of | |
3531 | OVERLAY. */ | |
3532 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
3533 | do \ | |
3534 | { \ | |
3535 | Lisp_Object priority; \ | |
3536 | \ | |
3537 | if (n == size) \ | |
3538 | { \ | |
3539 | int new_size = 2 * size; \ | |
3540 | struct overlay_entry *old = entries; \ | |
3541 | entries = \ | |
3542 | (struct overlay_entry *) alloca (new_size \ | |
3543 | * sizeof *entries); \ | |
3544 | bcopy (old, entries, size * sizeof *entries); \ | |
3545 | size = new_size; \ | |
3546 | } \ | |
3547 | \ | |
3548 | entries[n].string = (STRING); \ | |
2970b9be | 3549 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 3550 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 3551 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
3552 | entries[n].after_string_p = (AFTER_P); \ |
3553 | ++n; \ | |
3554 | } \ | |
3555 | while (0) | |
3556 | ||
3557 | /* Process overlay before the overlay center. */ | |
2970b9be | 3558 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3559 | { |
9472f927 | 3560 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3561 | xassert (OVERLAYP (overlay)); |
3562 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3563 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3564 | ||
cafafe0b | 3565 | if (end < charpos) |
5f5c8ee5 GM |
3566 | break; |
3567 | ||
3568 | /* Skip this overlay if it doesn't start or end at IT's current | |
3569 | position. */ | |
cafafe0b | 3570 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3571 | continue; |
3572 | ||
3573 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3574 | window = Foverlay_get (overlay, Qwindow); | |
3575 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3576 | continue; | |
3577 | ||
cafafe0b GM |
3578 | /* If the text ``under'' the overlay is invisible, both before- |
3579 | and after-strings from this overlay are visible; start and | |
3580 | end position are indistinguishable. */ | |
3581 | invisible = Foverlay_get (overlay, Qinvisible); | |
3582 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3583 | ||
5f5c8ee5 | 3584 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3585 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 3586 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 3587 | && SCHARS (str)) |
5f5c8ee5 GM |
3588 | RECORD_OVERLAY_STRING (overlay, str, 0); |
3589 | ||
3590 | /* If overlay has a non-empty after-string, record it. */ | |
cafafe0b | 3591 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 3592 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 3593 | && SCHARS (str)) |
5f5c8ee5 GM |
3594 | RECORD_OVERLAY_STRING (overlay, str, 1); |
3595 | } | |
3596 | ||
3597 | /* Process overlays after the overlay center. */ | |
2970b9be | 3598 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3599 | { |
9472f927 | 3600 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3601 | xassert (OVERLAYP (overlay)); |
3602 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3603 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3604 | ||
cafafe0b | 3605 | if (start > charpos) |
5f5c8ee5 GM |
3606 | break; |
3607 | ||
3608 | /* Skip this overlay if it doesn't start or end at IT's current | |
3609 | position. */ | |
cafafe0b | 3610 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3611 | continue; |
3612 | ||
3613 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3614 | window = Foverlay_get (overlay, Qwindow); | |
3615 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3616 | continue; | |
3617 | ||
cafafe0b GM |
3618 | /* If the text ``under'' the overlay is invisible, it has a zero |
3619 | dimension, and both before- and after-strings apply. */ | |
3620 | invisible = Foverlay_get (overlay, Qinvisible); | |
3621 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3622 | ||
5f5c8ee5 | 3623 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3624 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 | 3625 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
2051c264 | 3626 | && SCHARS (str)) |
5f5c8ee5 GM |
3627 | RECORD_OVERLAY_STRING (overlay, str, 0); |
3628 | ||
3629 | /* If overlay has a non-empty after-string, record it. */ | |
cafafe0b | 3630 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 | 3631 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
2051c264 | 3632 | && SCHARS (str)) |
5f5c8ee5 GM |
3633 | RECORD_OVERLAY_STRING (overlay, str, 1); |
3634 | } | |
3635 | ||
3636 | #undef RECORD_OVERLAY_STRING | |
3637 | ||
3638 | /* Sort entries. */ | |
cafafe0b | 3639 | if (n > 1) |
2970b9be | 3640 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
3641 | |
3642 | /* Record the total number of strings to process. */ | |
3643 | it->n_overlay_strings = n; | |
3644 | ||
3645 | /* IT->current.overlay_string_index is the number of overlay strings | |
3646 | that have already been consumed by IT. Copy some of the | |
3647 | remaining overlay strings to IT->overlay_strings. */ | |
3648 | i = 0; | |
3649 | j = it->current.overlay_string_index; | |
3650 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
3651 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 3652 | |
5f5c8ee5 GM |
3653 | CHECK_IT (it); |
3654 | } | |
3655 | ||
3656 | ||
3657 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
3658 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
3659 | least one overlay string was found. */ | |
5f5c8ee5 GM |
3660 | |
3661 | static int | |
5a08cbaf | 3662 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 3663 | struct it *it; |
5a08cbaf | 3664 | int charpos; |
5f5c8ee5 GM |
3665 | { |
3666 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
3667 | process. This fills IT->overlay_strings with strings, and sets | |
3668 | IT->n_overlay_strings to the total number of strings to process. | |
3669 | IT->pos.overlay_string_index has to be set temporarily to zero | |
3670 | because load_overlay_strings needs this; it must be set to -1 | |
3671 | when no overlay strings are found because a zero value would | |
3672 | indicate a position in the first overlay string. */ | |
3673 | it->current.overlay_string_index = 0; | |
5a08cbaf | 3674 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
3675 | |
3676 | /* If we found overlay strings, set up IT to deliver display | |
3677 | elements from the first one. Otherwise set up IT to deliver | |
3678 | from current_buffer. */ | |
3679 | if (it->n_overlay_strings) | |
3680 | { | |
3681 | /* Make sure we know settings in current_buffer, so that we can | |
3682 | restore meaningful values when we're done with the overlay | |
3683 | strings. */ | |
3684 | compute_stop_pos (it); | |
3685 | xassert (it->face_id >= 0); | |
3686 | ||
3687 | /* Save IT's settings. They are restored after all overlay | |
3688 | strings have been processed. */ | |
3689 | xassert (it->sp == 0); | |
3690 | push_it (it); | |
3691 | ||
3692 | /* Set up IT to deliver display elements from the first overlay | |
3693 | string. */ | |
3694 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 3695 | it->string = it->overlay_strings[0]; |
b2046df8 | 3696 | it->stop_charpos = 0; |
5f5c8ee5 | 3697 | xassert (STRINGP (it->string)); |
2051c264 GM |
3698 | it->end_charpos = SCHARS (it->string); |
3699 | it->multibyte_p = SMBP (it->string); | |
5f5c8ee5 GM |
3700 | it->method = next_element_from_string; |
3701 | } | |
3702 | else | |
3703 | { | |
3704 | it->string = Qnil; | |
3705 | it->current.overlay_string_index = -1; | |
3706 | it->method = next_element_from_buffer; | |
3707 | } | |
3708 | ||
3709 | CHECK_IT (it); | |
3710 | ||
3711 | /* Value is non-zero if we found at least one overlay string. */ | |
3712 | return STRINGP (it->string); | |
3713 | } | |
3714 | ||
3715 | ||
3716 | \f | |
3717 | /*********************************************************************** | |
3718 | Saving and restoring state | |
3719 | ***********************************************************************/ | |
3720 | ||
3721 | /* Save current settings of IT on IT->stack. Called, for example, | |
3722 | before setting up IT for an overlay string, to be able to restore | |
3723 | IT's settings to what they were after the overlay string has been | |
3724 | processed. */ | |
3725 | ||
3726 | static void | |
3727 | push_it (it) | |
3728 | struct it *it; | |
3729 | { | |
3730 | struct iterator_stack_entry *p; | |
3731 | ||
3732 | xassert (it->sp < 2); | |
3733 | p = it->stack + it->sp; | |
3734 | ||
3735 | p->stop_charpos = it->stop_charpos; | |
3736 | xassert (it->face_id >= 0); | |
3737 | p->face_id = it->face_id; | |
3738 | p->string = it->string; | |
3739 | p->pos = it->current; | |
3740 | p->end_charpos = it->end_charpos; | |
3741 | p->string_nchars = it->string_nchars; | |
3742 | p->area = it->area; | |
3743 | p->multibyte_p = it->multibyte_p; | |
3744 | p->space_width = it->space_width; | |
3745 | p->font_height = it->font_height; | |
3746 | p->voffset = it->voffset; | |
3747 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 3748 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
3749 | ++it->sp; |
3750 | } | |
3751 | ||
3752 | ||
3753 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
3754 | more overlay strings must be processed, and we return to delivering | |
3755 | display elements from a buffer, or when the end of a string from a | |
3756 | `display' property is reached and we return to delivering display | |
3757 | elements from an overlay string, or from a buffer. */ | |
3758 | ||
3759 | static void | |
3760 | pop_it (it) | |
3761 | struct it *it; | |
3762 | { | |
3763 | struct iterator_stack_entry *p; | |
3764 | ||
3765 | xassert (it->sp > 0); | |
3766 | --it->sp; | |
3767 | p = it->stack + it->sp; | |
3768 | it->stop_charpos = p->stop_charpos; | |
3769 | it->face_id = p->face_id; | |
3770 | it->string = p->string; | |
3771 | it->current = p->pos; | |
3772 | it->end_charpos = p->end_charpos; | |
3773 | it->string_nchars = p->string_nchars; | |
3774 | it->area = p->area; | |
3775 | it->multibyte_p = p->multibyte_p; | |
3776 | it->space_width = p->space_width; | |
3777 | it->font_height = p->font_height; | |
3778 | it->voffset = p->voffset; | |
3779 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3780 | } | |
3781 | ||
3782 | ||
3783 | \f | |
3784 | /*********************************************************************** | |
3785 | Moving over lines | |
3786 | ***********************************************************************/ | |
3787 | ||
3788 | /* Set IT's current position to the previous line start. */ | |
3789 | ||
3790 | static void | |
3791 | back_to_previous_line_start (it) | |
3792 | struct it *it; | |
3793 | { | |
3794 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3795 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3796 | } | |
3797 | ||
3798 | ||
cafafe0b GM |
3799 | /* Move IT to the next line start. |
3800 | ||
3801 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if | |
3802 | we skipped over part of the text (as opposed to moving the iterator | |
3803 | continuously over the text). Otherwise, don't change the value | |
3804 | of *SKIPPED_P. | |
3805 | ||
3806 | Newlines may come from buffer text, overlay strings, or strings | |
3807 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
3808 | simply use find_next_newline_no_quit. |
3809 | ||
3810 | Note that this function may not skip over invisible text that is so | |
3811 | because of text properties and immediately follows a newline. If | |
3812 | it would, function reseat_at_next_visible_line_start, when called | |
3813 | from set_iterator_to_next, would effectively make invisible | |
3814 | characters following a newline part of the wrong glyph row, which | |
3815 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 3816 | |
cafafe0b GM |
3817 | static int |
3818 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 3819 | struct it *it; |
cafafe0b | 3820 | int *skipped_p; |
5f5c8ee5 | 3821 | { |
54918e2b | 3822 | int old_selective, newline_found_p, n; |
cafafe0b GM |
3823 | const int MAX_NEWLINE_DISTANCE = 500; |
3824 | ||
0fd37545 GM |
3825 | /* If already on a newline, just consume it to avoid unintended |
3826 | skipping over invisible text below. */ | |
51695746 GM |
3827 | if (it->what == IT_CHARACTER |
3828 | && it->c == '\n' | |
3829 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
3830 | { |
3831 | set_iterator_to_next (it, 0); | |
a77dc1ec | 3832 | it->c = 0; |
0fd37545 GM |
3833 | return 1; |
3834 | } | |
3835 | ||
54918e2b | 3836 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
3837 | unnecessary because it's done by the caller, and (b) leads to an |
3838 | infinite recursion because next_element_from_ellipsis indirectly | |
3839 | calls this function. */ | |
54918e2b GM |
3840 | old_selective = it->selective; |
3841 | it->selective = 0; | |
3842 | ||
cafafe0b GM |
3843 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
3844 | from buffer text. */ | |
3aec8722 GM |
3845 | for (n = newline_found_p = 0; |
3846 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
3847 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 3848 | { |
8692ca92 GM |
3849 | if (!get_next_display_element (it)) |
3850 | break; | |
d02f1cb8 | 3851 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 3852 | set_iterator_to_next (it, 0); |
cafafe0b GM |
3853 | } |
3854 | ||
3855 | /* If we didn't find a newline near enough, see if we can use a | |
3856 | short-cut. */ | |
3aec8722 | 3857 | if (n == MAX_NEWLINE_DISTANCE) |
cafafe0b GM |
3858 | { |
3859 | int start = IT_CHARPOS (*it); | |
3860 | int limit = find_next_newline_no_quit (start, 1); | |
3861 | Lisp_Object pos; | |
3862 | ||
3863 | xassert (!STRINGP (it->string)); | |
3864 | ||
3865 | /* If there isn't any `display' property in sight, and no | |
3866 | overlays, we can just use the position of the newline in | |
3867 | buffer text. */ | |
3868 | if (it->stop_charpos >= limit | |
3869 | || ((pos = Fnext_single_property_change (make_number (start), | |
3870 | Qdisplay, | |
3871 | Qnil, make_number (limit)), | |
3872 | NILP (pos)) | |
3873 | && next_overlay_change (start) == ZV)) | |
3874 | { | |
3875 | IT_CHARPOS (*it) = limit; | |
3876 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
3877 | *skipped_p = newline_found_p = 1; | |
3878 | } | |
3879 | else | |
3880 | { | |
3881 | while (get_next_display_element (it) | |
3882 | && !newline_found_p) | |
3883 | { | |
3884 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
3885 | set_iterator_to_next (it, 0); | |
3886 | } | |
3887 | } | |
3888 | } | |
3889 | ||
54918e2b | 3890 | it->selective = old_selective; |
cafafe0b | 3891 | return newline_found_p; |
5f5c8ee5 GM |
3892 | } |
3893 | ||
3894 | ||
3895 | /* Set IT's current position to the previous visible line start. Skip | |
3896 | invisible text that is so either due to text properties or due to | |
3897 | selective display. Caution: this does not change IT->current_x and | |
3898 | IT->hpos. */ | |
3899 | ||
3900 | static void | |
3901 | back_to_previous_visible_line_start (it) | |
3902 | struct it *it; | |
3903 | { | |
3904 | int visible_p = 0; | |
3905 | ||
3906 | /* Go back one newline if not on BEGV already. */ | |
3907 | if (IT_CHARPOS (*it) > BEGV) | |
3908 | back_to_previous_line_start (it); | |
3909 | ||
3910 | /* Move over lines that are invisible because of selective display | |
3911 | or text properties. */ | |
3912 | while (IT_CHARPOS (*it) > BEGV | |
3913 | && !visible_p) | |
3914 | { | |
3915 | visible_p = 1; | |
3916 | ||
3917 | /* If selective > 0, then lines indented more than that values | |
3918 | are invisible. */ | |
3919 | if (it->selective > 0 | |
3920 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3921 | it->selective)) | |
3922 | visible_p = 0; | |
5f5c8ee5 GM |
3923 | else |
3924 | { | |
3925 | Lisp_Object prop; | |
3926 | ||
6fc556fd KR |
3927 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
3928 | Qinvisible, it->window); | |
5f5c8ee5 GM |
3929 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
3930 | visible_p = 0; | |
3931 | } | |
5f5c8ee5 GM |
3932 | |
3933 | /* Back one more newline if the current one is invisible. */ | |
3934 | if (!visible_p) | |
3935 | back_to_previous_line_start (it); | |
3936 | } | |
3937 | ||
3938 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3939 | xassert (IT_CHARPOS (*it) == BEGV | |
3940 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3941 | CHECK_IT (it); | |
3942 | } | |
3943 | ||
3944 | ||
3945 | /* Reseat iterator IT at the previous visible line start. Skip | |
3946 | invisible text that is so either due to text properties or due to | |
3947 | selective display. At the end, update IT's overlay information, | |
3948 | face information etc. */ | |
3949 | ||
3950 | static void | |
3951 | reseat_at_previous_visible_line_start (it) | |
3952 | struct it *it; | |
3953 | { | |
3954 | back_to_previous_visible_line_start (it); | |
3955 | reseat (it, it->current.pos, 1); | |
3956 | CHECK_IT (it); | |
3957 | } | |
3958 | ||
3959 | ||
3960 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3961 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3962 | preceding the line start. Skip over invisible text that is so | |
3963 | because of selective display. Compute faces, overlays etc at the | |
3964 | new position. Note that this function does not skip over text that | |
3965 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3966 | |
3967 | static void | |
312246d1 | 3968 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3969 | struct it *it; |
312246d1 | 3970 | int on_newline_p; |
5f5c8ee5 | 3971 | { |
cafafe0b GM |
3972 | int newline_found_p, skipped_p = 0; |
3973 | ||
3974 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
3975 | ||
3976 | /* Skip over lines that are invisible because they are indented | |
3977 | more than the value of IT->selective. */ | |
3978 | if (it->selective > 0) | |
3979 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 3980 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
cafafe0b | 3981 | it->selective)) |
a77dc1ec GM |
3982 | { |
3983 | xassert (FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3984 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
3985 | } | |
cafafe0b GM |
3986 | |
3987 | /* Position on the newline if that's what's requested. */ | |
3988 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 3989 | { |
cafafe0b | 3990 | if (STRINGP (it->string)) |
5f5c8ee5 | 3991 | { |
cafafe0b GM |
3992 | if (IT_STRING_CHARPOS (*it) > 0) |
3993 | { | |
3994 | --IT_STRING_CHARPOS (*it); | |
3995 | --IT_STRING_BYTEPOS (*it); | |
3996 | } | |
5f5c8ee5 | 3997 | } |
cafafe0b | 3998 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
3999 | { |
4000 | --IT_CHARPOS (*it); | |
cafafe0b GM |
4001 | --IT_BYTEPOS (*it); |
4002 | reseat (it, it->current.pos, 0); | |
312246d1 | 4003 | } |
5f5c8ee5 | 4004 | } |
cafafe0b GM |
4005 | else if (skipped_p) |
4006 | reseat (it, it->current.pos, 0); | |
5f5c8ee5 GM |
4007 | |
4008 | CHECK_IT (it); | |
4009 | } | |
4010 | ||
4011 | ||
4012 | \f | |
4013 | /*********************************************************************** | |
4014 | Changing an iterator's position | |
4015 | ***********************************************************************/ | |
4016 | ||
4017 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
4018 | is non-zero, always check for text properties at the new position. | |
4019 | Otherwise, text properties are only looked up if POS >= | |
4020 | IT->check_charpos of a property. */ | |
4021 | ||
4022 | static void | |
4023 | reseat (it, pos, force_p) | |
4024 | struct it *it; | |
4025 | struct text_pos pos; | |
4026 | int force_p; | |
4027 | { | |
4028 | int original_pos = IT_CHARPOS (*it); | |
4029 | ||
4030 | reseat_1 (it, pos, 0); | |
4031 | ||
4032 | /* Determine where to check text properties. Avoid doing it | |
4033 | where possible because text property lookup is very expensive. */ | |
4034 | if (force_p | |
4035 | || CHARPOS (pos) > it->stop_charpos | |
4036 | || CHARPOS (pos) < original_pos) | |
4037 | handle_stop (it); | |
4038 | ||
4039 | CHECK_IT (it); | |
4040 | } | |
4041 | ||
4042 | ||
4043 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
4044 | IT->stop_pos to POS, also. */ | |
4045 | ||
4046 | static void | |
4047 | reseat_1 (it, pos, set_stop_p) | |
4048 | struct it *it; | |
4049 | struct text_pos pos; | |
4050 | int set_stop_p; | |
4051 | { | |
4052 | /* Don't call this function when scanning a C string. */ | |
4053 | xassert (it->s == NULL); | |
4054 | ||
4055 | /* POS must be a reasonable value. */ | |
4056 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
4057 | ||
4058 | it->current.pos = it->position = pos; | |
4059 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 4060 | it->end_charpos = ZV; |
5f5c8ee5 GM |
4061 | it->dpvec = NULL; |
4062 | it->current.dpvec_index = -1; | |
4063 | it->current.overlay_string_index = -1; | |
4064 | IT_STRING_CHARPOS (*it) = -1; | |
4065 | IT_STRING_BYTEPOS (*it) = -1; | |
4066 | it->string = Qnil; | |
4067 | it->method = next_element_from_buffer; | |
06fd3792 | 4068 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 4069 | it->sp = 0; |
4aad61f8 | 4070 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
4071 | |
4072 | if (set_stop_p) | |
4073 | it->stop_charpos = CHARPOS (pos); | |
4074 | } | |
4075 | ||
4076 | ||
4077 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
4078 | If S is non-null, it is a C string to iterate over. Otherwise, | |
4079 | STRING gives a Lisp string to iterate over. | |
4080 | ||
4081 | If PRECISION > 0, don't return more then PRECISION number of | |
4082 | characters from the string. | |
4083 | ||
4084 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
4085 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
4086 | field width. | |
4087 | ||
4088 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
4089 | MULTIBYTE > 0 means enable it, | |
4090 | MULTIBYTE < 0 means use IT->multibyte_p. | |
4091 | ||
4092 | IT must be initialized via a prior call to init_iterator before | |
4093 | calling this function. */ | |
4094 | ||
4095 | static void | |
4096 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
4097 | struct it *it; | |
4098 | unsigned char *s; | |
4099 | Lisp_Object string; | |
4100 | int charpos; | |
4101 | int precision, field_width, multibyte; | |
4102 | { | |
4103 | /* No region in strings. */ | |
4104 | it->region_beg_charpos = it->region_end_charpos = -1; | |
4105 | ||
4106 | /* No text property checks performed by default, but see below. */ | |
4107 | it->stop_charpos = -1; | |
4108 | ||
4109 | /* Set iterator position and end position. */ | |
4110 | bzero (&it->current, sizeof it->current); | |
4111 | it->current.overlay_string_index = -1; | |
4112 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
4113 | xassert (charpos >= 0); |
4114 | ||
e719f5ae GM |
4115 | /* If STRING is specified, use its multibyteness, otherwise use the |
4116 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 4117 | if (multibyte >= 0) |
5f5c8ee5 GM |
4118 | it->multibyte_p = multibyte > 0; |
4119 | ||
4120 | if (s == NULL) | |
4121 | { | |
4122 | xassert (STRINGP (string)); | |
4123 | it->string = string; | |
4124 | it->s = NULL; | |
2051c264 | 4125 | it->end_charpos = it->string_nchars = SCHARS (string); |
5f5c8ee5 GM |
4126 | it->method = next_element_from_string; |
4127 | it->current.string_pos = string_pos (charpos, string); | |
4128 | } | |
4129 | else | |
4130 | { | |
4131 | it->s = s; | |
4132 | it->string = Qnil; | |
4133 | ||
4134 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
4135 | for displaying C strings. */ | |
4136 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
4137 | if (it->multibyte_p) | |
4138 | { | |
4139 | it->current.pos = c_string_pos (charpos, s, 1); | |
4140 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
4141 | } | |
4142 | else | |
4143 | { | |
4144 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
4145 | it->end_charpos = it->string_nchars = strlen (s); | |
4146 | } | |
4147 | ||
4148 | it->method = next_element_from_c_string; | |
4149 | } | |
4150 | ||
4151 | /* PRECISION > 0 means don't return more than PRECISION characters | |
4152 | from the string. */ | |
4153 | if (precision > 0 && it->end_charpos - charpos > precision) | |
4154 | it->end_charpos = it->string_nchars = charpos + precision; | |
4155 | ||
4156 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
4157 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
4158 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
4159 | padding with `-' at the end of a mode line. */ | |
4160 | if (field_width < 0) | |
4161 | field_width = INFINITY; | |
4162 | if (field_width > it->end_charpos - charpos) | |
4163 | it->end_charpos = charpos + field_width; | |
4164 | ||
4165 | /* Use the standard display table for displaying strings. */ | |
4166 | if (DISP_TABLE_P (Vstandard_display_table)) | |
4167 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
4168 | ||
4169 | it->stop_charpos = charpos; | |
4170 | CHECK_IT (it); | |
4171 | } | |
4172 | ||
4173 | ||
4174 | \f | |
4175 | /*********************************************************************** | |
4176 | Iteration | |
4177 | ***********************************************************************/ | |
4178 | ||
4179 | /* Load IT's display element fields with information about the next | |
4180 | display element from the current position of IT. Value is zero if | |
4181 | end of buffer (or C string) is reached. */ | |
4182 | ||
4183 | int | |
4184 | get_next_display_element (it) | |
4185 | struct it *it; | |
4186 | { | |
4187 | /* Non-zero means that we found an display element. Zero means that | |
4188 | we hit the end of what we iterate over. Performance note: the | |
4189 | function pointer `method' used here turns out to be faster than | |
4190 | using a sequence of if-statements. */ | |
4191 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
4192 | |
4193 | if (it->what == IT_CHARACTER) | |
4194 | { | |
4195 | /* Map via display table or translate control characters. | |
4196 | IT->c, IT->len etc. have been set to the next character by | |
4197 | the function call above. If we have a display table, and it | |
4198 | contains an entry for IT->c, translate it. Don't do this if | |
4199 | IT->c itself comes from a display table, otherwise we could | |
4200 | end up in an infinite recursion. (An alternative could be to | |
4201 | count the recursion depth of this function and signal an | |
4202 | error when a certain maximum depth is reached.) Is it worth | |
4203 | it? */ | |
4204 | if (success_p && it->dpvec == NULL) | |
4205 | { | |
4206 | Lisp_Object dv; | |
4207 | ||
4208 | if (it->dp | |
4209 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
4210 | VECTORP (dv))) | |
4211 | { | |
4212 | struct Lisp_Vector *v = XVECTOR (dv); | |
4213 | ||
4214 | /* Return the first character from the display table | |
4215 | entry, if not empty. If empty, don't display the | |
4216 | current character. */ | |
4217 | if (v->size) | |
4218 | { | |
4219 | it->dpvec_char_len = it->len; | |
4220 | it->dpvec = v->contents; | |
4221 | it->dpend = v->contents + v->size; | |
4222 | it->current.dpvec_index = 0; | |
4223 | it->method = next_element_from_display_vector; | |
7eee47cc GM |
4224 | success_p = get_next_display_element (it); |
4225 | } | |
4226 | else | |
4227 | { | |
4228 | set_iterator_to_next (it, 0); | |
4229 | success_p = get_next_display_element (it); | |
5f5c8ee5 | 4230 | } |
5f5c8ee5 GM |
4231 | } |
4232 | ||
4233 | /* Translate control characters into `\003' or `^C' form. | |
4234 | Control characters coming from a display table entry are | |
4235 | currently not translated because we use IT->dpvec to hold | |
4236 | the translation. This could easily be changed but I | |
197516c2 KH |
4237 | don't believe that it is worth doing. |
4238 | ||
4239 | Non-printable multibyte characters are also translated | |
4240 | octal form. */ | |
5f5c8ee5 GM |
4241 | else if ((it->c < ' ' |
4242 | && (it->area != TEXT_AREA | |
c6e89d6c | 4243 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 4244 | || (it->c >= 127 |
197516c2 KH |
4245 | && it->len == 1) |
4246 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
4247 | { |
4248 | /* IT->c is a control character which must be displayed | |
4249 | either as '\003' or as `^C' where the '\\' and '^' | |
4250 | can be defined in the display table. Fill | |
4251 | IT->ctl_chars with glyphs for what we have to | |
4252 | display. Then, set IT->dpvec to these glyphs. */ | |
4253 | GLYPH g; | |
4254 | ||
54c85a23 | 4255 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
4256 | { |
4257 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
4258 | if (it->dp | |
4259 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
4260 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
4261 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
4262 | else | |
4263 | g = FAST_MAKE_GLYPH ('^', 0); | |
4264 | XSETINT (it->ctl_chars[0], g); | |
4265 | ||
4266 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
4267 | XSETINT (it->ctl_chars[1], g); | |
4268 | ||
4269 | /* Set up IT->dpvec and return first character from it. */ | |
4270 | it->dpvec_char_len = it->len; | |
4271 | it->dpvec = it->ctl_chars; | |
4272 | it->dpend = it->dpvec + 2; | |
4273 | it->current.dpvec_index = 0; | |
4274 | it->method = next_element_from_display_vector; | |
4275 | get_next_display_element (it); | |
4276 | } | |
4277 | else | |
4278 | { | |
260a86a0 | 4279 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 4280 | int len; |
197516c2 KH |
4281 | int i; |
4282 | GLYPH escape_glyph; | |
4283 | ||
5f5c8ee5 GM |
4284 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
4285 | if (it->dp | |
4286 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
4287 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 4288 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 4289 | else |
197516c2 KH |
4290 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
4291 | ||
c5924f47 KH |
4292 | if (SINGLE_BYTE_CHAR_P (it->c)) |
4293 | str[0] = it->c, len = 1; | |
4294 | else | |
ea9dd091 GM |
4295 | { |
4296 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
4297 | if (len < 0) | |
4298 | { | |
4299 | /* It's an invalid character, which | |
4300 | shouldn't happen actually, but due to | |
4301 | bugs it may happen. Let's print the char | |
4302 | as is, there's not much meaningful we can | |
4303 | do with it. */ | |
4304 | str[0] = it->c; | |
4305 | str[1] = it->c >> 8; | |
4306 | str[2] = it->c >> 16; | |
4307 | str[3] = it->c >> 24; | |
4308 | len = 4; | |
4309 | } | |
4310 | } | |
c5924f47 | 4311 | |
197516c2 KH |
4312 | for (i = 0; i < len; i++) |
4313 | { | |
4314 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
4315 | /* Insert three more glyphs into IT->ctl_chars for | |
4316 | the octal display of the character. */ | |
4317 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
4318 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
4319 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
4320 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
4321 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
4322 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
4323 | } | |
5f5c8ee5 GM |
4324 | |
4325 | /* Set up IT->dpvec and return the first character | |
4326 | from it. */ | |
4327 | it->dpvec_char_len = it->len; | |
4328 | it->dpvec = it->ctl_chars; | |
197516c2 | 4329 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
4330 | it->current.dpvec_index = 0; |
4331 | it->method = next_element_from_display_vector; | |
4332 | get_next_display_element (it); | |
4333 | } | |
4334 | } | |
4335 | } | |
4336 | ||
980806b6 KH |
4337 | /* Adjust face id for a multibyte character. There are no |
4338 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
4339 | if (it->multibyte_p |
4340 | && success_p | |
980806b6 | 4341 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 4342 | { |
980806b6 KH |
4343 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
4344 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
4345 | } |
4346 | } | |
4347 | ||
4348 | /* Is this character the last one of a run of characters with | |
4349 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
4350 | if (it->face_box_p | |
4351 | && it->s == NULL) | |
4352 | { | |
4353 | int face_id; | |
4354 | struct face *face; | |
4355 | ||
4356 | it->end_of_box_run_p | |
4357 | = ((face_id = face_after_it_pos (it), | |
4358 | face_id != it->face_id) | |
4359 | && (face = FACE_FROM_ID (it->f, face_id), | |
4360 | face->box == FACE_NO_BOX)); | |
4361 | } | |
4362 | ||
4363 | /* Value is 0 if end of buffer or string reached. */ | |
4364 | return success_p; | |
4365 | } | |
4366 | ||
4367 | ||
4368 | /* Move IT to the next display element. | |
4369 | ||
cafafe0b GM |
4370 | RESEAT_P non-zero means if called on a newline in buffer text, |
4371 | skip to the next visible line start. | |
4372 | ||
5f5c8ee5 GM |
4373 | Functions get_next_display_element and set_iterator_to_next are |
4374 | separate because I find this arrangement easier to handle than a | |
4375 | get_next_display_element function that also increments IT's | |
4376 | position. The way it is we can first look at an iterator's current | |
4377 | display element, decide whether it fits on a line, and if it does, | |
4378 | increment the iterator position. The other way around we probably | |
4379 | would either need a flag indicating whether the iterator has to be | |
4380 | incremented the next time, or we would have to implement a | |
4381 | decrement position function which would not be easy to write. */ | |
4382 | ||
4383 | void | |
cafafe0b | 4384 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 4385 | struct it *it; |
cafafe0b | 4386 | int reseat_p; |
5f5c8ee5 | 4387 | { |
483de32b GM |
4388 | /* Reset flags indicating start and end of a sequence of characters |
4389 | with box. Reset them at the start of this function because | |
4390 | moving the iterator to a new position might set them. */ | |
4391 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
4392 | ||
5f5c8ee5 GM |
4393 | if (it->method == next_element_from_buffer) |
4394 | { | |
4395 | /* The current display element of IT is a character from | |
4396 | current_buffer. Advance in the buffer, and maybe skip over | |
4397 | invisible lines that are so because of selective display. */ | |
cafafe0b | 4398 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 4399 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4400 | else |
4401 | { | |
4402 | xassert (it->len != 0); | |
4403 | IT_BYTEPOS (*it) += it->len; | |
4404 | IT_CHARPOS (*it) += 1; | |
4405 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
4406 | } | |
4407 | } | |
260a86a0 KH |
4408 | else if (it->method == next_element_from_composition) |
4409 | { | |
4410 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
4411 | if (STRINGP (it->string)) | |
4412 | { | |
4413 | IT_STRING_BYTEPOS (*it) += it->len; | |
4414 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
4415 | it->method = next_element_from_string; | |
4416 | goto consider_string_end; | |
4417 | } | |
4418 | else | |
4419 | { | |
4420 | IT_BYTEPOS (*it) += it->len; | |
4421 | IT_CHARPOS (*it) += it->cmp_len; | |
4422 | it->method = next_element_from_buffer; | |
4423 | } | |
4424 | } | |
5f5c8ee5 GM |
4425 | else if (it->method == next_element_from_c_string) |
4426 | { | |
4427 | /* Current display element of IT is from a C string. */ | |
4428 | IT_BYTEPOS (*it) += it->len; | |
4429 | IT_CHARPOS (*it) += 1; | |
4430 | } | |
4431 | else if (it->method == next_element_from_display_vector) | |
4432 | { | |
4433 | /* Current display element of IT is from a display table entry. | |
4434 | Advance in the display table definition. Reset it to null if | |
4435 | end reached, and continue with characters from buffers/ | |
4436 | strings. */ | |
4437 | ++it->current.dpvec_index; | |
286bcbc9 | 4438 | |
980806b6 KH |
4439 | /* Restore face of the iterator to what they were before the |
4440 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 4441 | it->face_id = it->saved_face_id; |
286bcbc9 | 4442 | |
5f5c8ee5 GM |
4443 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
4444 | { | |
4445 | if (it->s) | |
4446 | it->method = next_element_from_c_string; | |
4447 | else if (STRINGP (it->string)) | |
4448 | it->method = next_element_from_string; | |
4449 | else | |
4450 | it->method = next_element_from_buffer; | |
4451 | ||
4452 | it->dpvec = NULL; | |
4453 | it->current.dpvec_index = -1; | |
4454 | ||
312246d1 GM |
4455 | /* Skip over characters which were displayed via IT->dpvec. */ |
4456 | if (it->dpvec_char_len < 0) | |
4457 | reseat_at_next_visible_line_start (it, 1); | |
4458 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
4459 | { |
4460 | it->len = it->dpvec_char_len; | |
cafafe0b | 4461 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 GM |
4462 | } |
4463 | } | |
4464 | } | |
4465 | else if (it->method == next_element_from_string) | |
4466 | { | |
4467 | /* Current display element is a character from a Lisp string. */ | |
4468 | xassert (it->s == NULL && STRINGP (it->string)); | |
4469 | IT_STRING_BYTEPOS (*it) += it->len; | |
4470 | IT_STRING_CHARPOS (*it) += 1; | |
4471 | ||
4472 | consider_string_end: | |
4473 | ||
4474 | if (it->current.overlay_string_index >= 0) | |
4475 | { | |
4476 | /* IT->string is an overlay string. Advance to the | |
4477 | next, if there is one. */ | |
2051c264 | 4478 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4479 | next_overlay_string (it); |
4480 | } | |
4481 | else | |
4482 | { | |
4483 | /* IT->string is not an overlay string. If we reached | |
4484 | its end, and there is something on IT->stack, proceed | |
4485 | with what is on the stack. This can be either another | |
4486 | string, this time an overlay string, or a buffer. */ | |
2051c264 | 4487 | if (IT_STRING_CHARPOS (*it) == SCHARS (it->string) |
5f5c8ee5 GM |
4488 | && it->sp > 0) |
4489 | { | |
4490 | pop_it (it); | |
4491 | if (!STRINGP (it->string)) | |
4492 | it->method = next_element_from_buffer; | |
b2046df8 GM |
4493 | else |
4494 | goto consider_string_end; | |
5f5c8ee5 GM |
4495 | } |
4496 | } | |
4497 | } | |
4498 | else if (it->method == next_element_from_image | |
4499 | || it->method == next_element_from_stretch) | |
4500 | { | |
4501 | /* The position etc with which we have to proceed are on | |
4502 | the stack. The position may be at the end of a string, | |
4503 | if the `display' property takes up the whole string. */ | |
4504 | pop_it (it); | |
4505 | it->image_id = 0; | |
4506 | if (STRINGP (it->string)) | |
4507 | { | |
4508 | it->method = next_element_from_string; | |
4509 | goto consider_string_end; | |
4510 | } | |
4511 | else | |
4512 | it->method = next_element_from_buffer; | |
4513 | } | |
4514 | else | |
4515 | /* There are no other methods defined, so this should be a bug. */ | |
4516 | abort (); | |
4517 | ||
5f5c8ee5 GM |
4518 | xassert (it->method != next_element_from_string |
4519 | || (STRINGP (it->string) | |
4520 | && IT_STRING_CHARPOS (*it) >= 0)); | |
4521 | } | |
4522 | ||
4523 | ||
4524 | /* Load IT's display element fields with information about the next | |
4525 | display element which comes from a display table entry or from the | |
4526 | result of translating a control character to one of the forms `^C' | |
4527 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
4528 | ||
4529 | static int | |
4530 | next_element_from_display_vector (it) | |
4531 | struct it *it; | |
4532 | { | |
4533 | /* Precondition. */ | |
4534 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
4535 | ||
4536 | /* Remember the current face id in case glyphs specify faces. | |
4537 | IT's face is restored in set_iterator_to_next. */ | |
4538 | it->saved_face_id = it->face_id; | |
4539 | ||
4540 | if (INTEGERP (*it->dpvec) | |
4541 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
4542 | { | |
4543 | int lface_id; | |
4544 | GLYPH g; | |
4545 | ||
4546 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
4547 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 4548 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
4549 | |
4550 | /* The entry may contain a face id to use. Such a face id is | |
4551 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 4552 | zero means no face is specified. */ |
5f5c8ee5 GM |
4553 | lface_id = FAST_GLYPH_FACE (g); |
4554 | if (lface_id) | |
4555 | { | |
969065c3 | 4556 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
4557 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
4558 | if (face_id >= 0) | |
969065c3 | 4559 | it->face_id = face_id; |
5f5c8ee5 GM |
4560 | } |
4561 | } | |
4562 | else | |
4563 | /* Display table entry is invalid. Return a space. */ | |
4564 | it->c = ' ', it->len = 1; | |
4565 | ||
4566 | /* Don't change position and object of the iterator here. They are | |
4567 | still the values of the character that had this display table | |
4568 | entry or was translated, and that's what we want. */ | |
4569 | it->what = IT_CHARACTER; | |
4570 | return 1; | |
4571 | } | |
4572 | ||
4573 | ||
4574 | /* Load IT with the next display element from Lisp string IT->string. | |
4575 | IT->current.string_pos is the current position within the string. | |
4576 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
4577 | overlay string. */ | |
4578 | ||
4579 | static int | |
4580 | next_element_from_string (it) | |
4581 | struct it *it; | |
4582 | { | |
4583 | struct text_pos position; | |
4584 | ||
4585 | xassert (STRINGP (it->string)); | |
4586 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
4587 | position = it->current.string_pos; | |
4588 | ||
4589 | /* Time to check for invisible text? */ | |
4590 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
4591 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
4592 | { | |
4593 | handle_stop (it); | |
4594 | ||
4595 | /* Since a handler may have changed IT->method, we must | |
4596 | recurse here. */ | |
4597 | return get_next_display_element (it); | |
4598 | } | |
4599 | ||
4600 | if (it->current.overlay_string_index >= 0) | |
4601 | { | |
4602 | /* Get the next character from an overlay string. In overlay | |
4603 | strings, There is no field width or padding with spaces to | |
4604 | do. */ | |
2051c264 | 4605 | if (IT_STRING_CHARPOS (*it) >= SCHARS (it->string)) |
5f5c8ee5 GM |
4606 | { |
4607 | it->what = IT_EOB; | |
4608 | return 0; | |
4609 | } | |
4610 | else if (STRING_MULTIBYTE (it->string)) | |
4611 | { | |
2051c264 GM |
4612 | int remaining = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
4613 | unsigned char *s = SDATA (it->string) + IT_STRING_BYTEPOS (*it); | |
4fdb80f2 | 4614 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
4615 | } |
4616 | else | |
4617 | { | |
2051c264 | 4618 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
4619 | it->len = 1; |
4620 | } | |
4621 | } | |
4622 | else | |
4623 | { | |
4624 | /* Get the next character from a Lisp string that is not an | |
4625 | overlay string. Such strings come from the mode line, for | |
4626 | example. We may have to pad with spaces, or truncate the | |
4627 | string. See also next_element_from_c_string. */ | |
4628 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
4629 | { | |
4630 | it->what = IT_EOB; | |
4631 | return 0; | |
4632 | } | |
4633 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
4634 | { | |
4635 | /* Pad with spaces. */ | |
4636 | it->c = ' ', it->len = 1; | |
4637 | CHARPOS (position) = BYTEPOS (position) = -1; | |
4638 | } | |
4639 | else if (STRING_MULTIBYTE (it->string)) | |
4640 | { | |
2051c264 GM |
4641 | int maxlen = SBYTES (it->string) - IT_STRING_BYTEPOS (*it); |
4642 | unsigned char *s = SDATA (it->string) + IT_STRING_BYTEPOS (*it); | |
4fdb80f2 | 4643 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
4644 | } |
4645 | else | |
4646 | { | |
2051c264 | 4647 | it->c = SREF (it->string, IT_STRING_BYTEPOS (*it)); |
5f5c8ee5 GM |
4648 | it->len = 1; |
4649 | } | |
4650 | } | |
4651 | ||
4652 | /* Record what we have and where it came from. Note that we store a | |
4653 | buffer position in IT->position although it could arguably be a | |
4654 | string position. */ | |
4655 | it->what = IT_CHARACTER; | |
4656 | it->object = it->string; | |
4657 | it->position = position; | |
4658 | return 1; | |
4659 | } | |
4660 | ||
4661 | ||
4662 | /* Load IT with next display element from C string IT->s. | |
4663 | IT->string_nchars is the maximum number of characters to return | |
4664 | from the string. IT->end_charpos may be greater than | |
4665 | IT->string_nchars when this function is called, in which case we | |
4666 | may have to return padding spaces. Value is zero if end of string | |
4667 | reached, including padding spaces. */ | |
4668 | ||
4669 | static int | |
4670 | next_element_from_c_string (it) | |
4671 | struct it *it; | |
4672 | { | |
4673 | int success_p = 1; | |
4674 | ||
4675 | xassert (it->s); | |
4676 | it->what = IT_CHARACTER; | |
4677 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
4678 | it->object = Qnil; | |
4679 | ||
4680 | /* IT's position can be greater IT->string_nchars in case a field | |
4681 | width or precision has been specified when the iterator was | |
4682 | initialized. */ | |
4683 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4684 | { | |
4685 | /* End of the game. */ | |
4686 | it->what = IT_EOB; | |
4687 | success_p = 0; | |
4688 | } | |
4689 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
4690 | { | |
4691 | /* Pad with spaces. */ | |
4692 | it->c = ' ', it->len = 1; | |
4693 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
4694 | } | |
4695 | else if (it->multibyte_p) | |
4696 | { | |
4697 | /* Implementation note: The calls to strlen apparently aren't a | |
4698 | performance problem because there is no noticeable performance | |
4699 | difference between Emacs running in unibyte or multibyte mode. */ | |
4700 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
4701 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
4702 | maxlen, &it->len); | |
5f5c8ee5 GM |
4703 | } |
4704 | else | |
4705 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
4706 | ||
4707 | return success_p; | |
4708 | } | |
4709 | ||
4710 | ||
4711 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
4712 | The definition of the ellipsis glyphs may come from a display table | |
4713 | entry. This function Fills IT with the first glyph from the | |
4714 | ellipsis if an ellipsis is to be displayed. */ | |
4715 | ||
13f19968 | 4716 | static int |
5f5c8ee5 GM |
4717 | next_element_from_ellipsis (it) |
4718 | struct it *it; | |
4719 | { | |
13f19968 | 4720 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 4721 | { |
13f19968 GM |
4722 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
4723 | { | |
4724 | /* Use the display table definition for `...'. Invalid glyphs | |
4725 | will be handled by the method returning elements from dpvec. */ | |
4726 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
4727 | it->dpvec_char_len = it->len; | |
4728 | it->dpvec = v->contents; | |
4729 | it->dpend = v->contents + v->size; | |
4730 | it->current.dpvec_index = 0; | |
4731 | it->method = next_element_from_display_vector; | |
4732 | } | |
4733 | else | |
4734 | { | |
4735 | /* Use default `...' which is stored in default_invis_vector. */ | |
4736 | it->dpvec_char_len = it->len; | |
4737 | it->dpvec = default_invis_vector; | |
4738 | it->dpend = default_invis_vector + 3; | |
4739 | it->current.dpvec_index = 0; | |
4740 | it->method = next_element_from_display_vector; | |
4741 | } | |
5f5c8ee5 | 4742 | } |
13f19968 | 4743 | else |
54918e2b | 4744 | { |
4aad61f8 GM |
4745 | /* The face at the current position may be different from the |
4746 | face we find after the invisible text. Remember what it | |
4747 | was in IT->saved_face_id, and signal that it's there by | |
4748 | setting face_before_selective_p. */ | |
4749 | it->saved_face_id = it->face_id; | |
54918e2b GM |
4750 | it->method = next_element_from_buffer; |
4751 | reseat_at_next_visible_line_start (it, 1); | |
4aad61f8 | 4752 | it->face_before_selective_p = 1; |
54918e2b | 4753 | } |
13f19968 GM |
4754 | |
4755 | return get_next_display_element (it); | |
5f5c8ee5 GM |
4756 | } |
4757 | ||
4758 | ||
4759 | /* Deliver an image display element. The iterator IT is already | |
4760 | filled with image information (done in handle_display_prop). Value | |
4761 | is always 1. */ | |
4762 | ||
4763 | ||
4764 | static int | |
4765 | next_element_from_image (it) | |
4766 | struct it *it; | |
4767 | { | |
4768 | it->what = IT_IMAGE; | |
4769 | return 1; | |
4770 | } | |
4771 | ||
4772 | ||
4773 | /* Fill iterator IT with next display element from a stretch glyph | |
4774 | property. IT->object is the value of the text property. Value is | |
4775 | always 1. */ | |
4776 | ||
4777 | static int | |
4778 | next_element_from_stretch (it) | |
4779 | struct it *it; | |
4780 | { | |
4781 | it->what = IT_STRETCH; | |
4782 | return 1; | |
4783 | } | |
4784 | ||
4785 | ||
4786 | /* Load IT with the next display element from current_buffer. Value | |
4787 | is zero if end of buffer reached. IT->stop_charpos is the next | |
4788 | position at which to stop and check for text properties or buffer | |
4789 | end. */ | |
4790 | ||
4791 | static int | |
4792 | next_element_from_buffer (it) | |
4793 | struct it *it; | |
4794 | { | |
4795 | int success_p = 1; | |
4796 | ||
4797 | /* Check this assumption, otherwise, we would never enter the | |
4798 | if-statement, below. */ | |
4799 | xassert (IT_CHARPOS (*it) >= BEGV | |
4800 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
4801 | ||
4802 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
4803 | { | |
4804 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4805 | { | |
4806 | int overlay_strings_follow_p; | |
4807 | ||
4808 | /* End of the game, except when overlay strings follow that | |
4809 | haven't been returned yet. */ | |
4810 | if (it->overlay_strings_at_end_processed_p) | |
4811 | overlay_strings_follow_p = 0; | |
4812 | else | |
4813 | { | |
4814 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 4815 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
4816 | } |
4817 | ||
4818 | if (overlay_strings_follow_p) | |
4819 | success_p = get_next_display_element (it); | |
4820 | else | |
4821 | { | |
4822 | it->what = IT_EOB; | |
4823 | it->position = it->current.pos; | |
4824 | success_p = 0; | |
4825 | } | |
4826 | } | |
4827 | else | |
4828 | { | |
4829 | handle_stop (it); | |
4830 | return get_next_display_element (it); | |
4831 | } | |
4832 | } | |
4833 | else | |
4834 | { | |
4835 | /* No face changes, overlays etc. in sight, so just return a | |
4836 | character from current_buffer. */ | |
4837 | unsigned char *p; | |
4838 | ||
4839 | /* Maybe run the redisplay end trigger hook. Performance note: | |
4840 | This doesn't seem to cost measurable time. */ | |
4841 | if (it->redisplay_end_trigger_charpos | |
4842 | && it->glyph_row | |
4843 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
4844 | run_redisplay_end_trigger_hook (it); | |
4845 | ||
4846 | /* Get the next character, maybe multibyte. */ | |
4847 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 4848 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
4849 | { |
4850 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
4851 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 4852 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
4853 | } |
4854 | else | |
4855 | it->c = *p, it->len = 1; | |
4856 | ||
4857 | /* Record what we have and where it came from. */ | |
4858 | it->what = IT_CHARACTER;; | |
4859 | it->object = it->w->buffer; | |
4860 | it->position = it->current.pos; | |
4861 | ||
4862 | /* Normally we return the character found above, except when we | |
4863 | really want to return an ellipsis for selective display. */ | |
4864 | if (it->selective) | |
4865 | { | |
4866 | if (it->c == '\n') | |
4867 | { | |
4868 | /* A value of selective > 0 means hide lines indented more | |
4869 | than that number of columns. */ | |
4870 | if (it->selective > 0 | |
4871 | && IT_CHARPOS (*it) + 1 < ZV | |
4872 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
4873 | IT_BYTEPOS (*it) + 1, | |
4874 | it->selective)) | |
312246d1 | 4875 | { |
13f19968 | 4876 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
4877 | it->dpvec_char_len = -1; |
4878 | } | |
5f5c8ee5 GM |
4879 | } |
4880 | else if (it->c == '\r' && it->selective == -1) | |
4881 | { | |
4882 | /* A value of selective == -1 means that everything from the | |
4883 | CR to the end of the line is invisible, with maybe an | |
4884 | ellipsis displayed for it. */ | |
13f19968 | 4885 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4886 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4887 | } |
4888 | } | |
4889 | } | |
4890 | ||
4891 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4892 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4893 | return success_p; |
4894 | } | |
4895 | ||
4896 | ||
4897 | /* Run the redisplay end trigger hook for IT. */ | |
4898 | ||
4899 | static void | |
4900 | run_redisplay_end_trigger_hook (it) | |
4901 | struct it *it; | |
4902 | { | |
4903 | Lisp_Object args[3]; | |
4904 | ||
4905 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4906 | displaying something, or otherwise we should not run the hook. */ | |
4907 | xassert (it->glyph_row); | |
4908 | ||
4909 | /* Set up hook arguments. */ | |
4910 | args[0] = Qredisplay_end_trigger_functions; | |
4911 | args[1] = it->window; | |
4912 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4913 | it->redisplay_end_trigger_charpos = 0; | |
4914 | ||
4915 | /* Since we are *trying* to run these functions, don't try to run | |
4916 | them again, even if they get an error. */ | |
4917 | it->w->redisplay_end_trigger = Qnil; | |
4918 | Frun_hook_with_args (3, args); | |
4919 | ||
4920 | /* Notice if it changed the face of the character we are on. */ | |
4921 | handle_face_prop (it); | |
4922 | } | |
4923 | ||
4924 | ||
260a86a0 KH |
4925 | /* Deliver a composition display element. The iterator IT is already |
4926 | filled with composition information (done in | |
4927 | handle_composition_prop). Value is always 1. */ | |
4928 | ||
4929 | static int | |
4930 | next_element_from_composition (it) | |
4931 | struct it *it; | |
4932 | { | |
4933 | it->what = IT_COMPOSITION; | |
4934 | it->position = (STRINGP (it->string) | |
4935 | ? it->current.string_pos | |
4936 | : it->current.pos); | |
4937 | return 1; | |
4938 | } | |
4939 | ||
4940 | ||
5f5c8ee5 GM |
4941 | \f |
4942 | /*********************************************************************** | |
4943 | Moving an iterator without producing glyphs | |
4944 | ***********************************************************************/ | |
4945 | ||
4946 | /* Move iterator IT to a specified buffer or X position within one | |
4947 | line on the display without producing glyphs. | |
4948 | ||
c53a1624 RS |
4949 | OP should be a bit mask including some or all of these bits: |
4950 | MOVE_TO_X: Stop on reaching x-position TO_X. | |
4951 | MOVE_TO_POS: Stop on reaching buffer or string position TO_CHARPOS. | |
4952 | Regardless of OP's value, stop in reaching the end of the display line. | |
5f5c8ee5 | 4953 | |
c53a1624 RS |
4954 | TO_X is normally a value 0 <= TO_X <= IT->last_visible_x. |
4955 | This means, in particular, that TO_X includes window's horizontal | |
4956 | scroll amount. | |
5f5c8ee5 | 4957 | |
c53a1624 RS |
4958 | The return value has several possible values that |
4959 | say what condition caused the scan to stop: | |
5f5c8ee5 GM |
4960 | |
4961 | MOVE_POS_MATCH_OR_ZV | |
4962 | - when TO_POS or ZV was reached. | |
4963 | ||
4964 | MOVE_X_REACHED | |
4965 | -when TO_X was reached before TO_POS or ZV were reached. | |
4966 | ||
4967 | MOVE_LINE_CONTINUED | |
4968 | - when we reached the end of the display area and the line must | |
4969 | be continued. | |
4970 | ||
4971 | MOVE_LINE_TRUNCATED | |
4972 | - when we reached the end of the display area and the line is | |
4973 | truncated. | |
4974 | ||
4975 | MOVE_NEWLINE_OR_CR | |
4976 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
4977 | display is on. */ | |
4978 | ||
701552dd | 4979 | static enum move_it_result |
5f5c8ee5 GM |
4980 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
4981 | struct it *it; | |
4982 | int to_charpos, to_x, op; | |
4983 | { | |
4984 | enum move_it_result result = MOVE_UNDEFINED; | |
4985 | struct glyph_row *saved_glyph_row; | |
4986 | ||
4987 | /* Don't produce glyphs in produce_glyphs. */ | |
4988 | saved_glyph_row = it->glyph_row; | |
4989 | it->glyph_row = NULL; | |
4990 | ||
5f5c8ee5 GM |
4991 | while (1) |
4992 | { | |
ae26e27d | 4993 | int x, i, ascent = 0, descent = 0; |
5f5c8ee5 GM |
4994 | |
4995 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4996 | if (!get_next_display_element (it) | |
4997 | || ((op & MOVE_TO_POS) != 0 | |
4998 | && BUFFERP (it->object) | |
4999 | && IT_CHARPOS (*it) >= to_charpos)) | |
5000 | { | |
5001 | result = MOVE_POS_MATCH_OR_ZV; | |
5002 | break; | |
5003 | } | |
5004 | ||
5005 | /* The call to produce_glyphs will get the metrics of the | |
5006 | display element IT is loaded with. We record in x the | |
5007 | x-position before this display element in case it does not | |
5008 | fit on the line. */ | |
5009 | x = it->current_x; | |
47589c8c GM |
5010 | |
5011 | /* Remember the line height so far in case the next element doesn't | |
5012 | fit on the line. */ | |
5013 | if (!it->truncate_lines_p) | |
5014 | { | |
5015 | ascent = it->max_ascent; | |
5016 | descent = it->max_descent; | |
5017 | } | |
5018 | ||
5f5c8ee5 GM |
5019 | PRODUCE_GLYPHS (it); |
5020 | ||
5021 | if (it->area != TEXT_AREA) | |
5022 | { | |
cafafe0b | 5023 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5024 | continue; |
5025 | } | |
5026 | ||
5027 | /* The number of glyphs we get back in IT->nglyphs will normally | |
5028 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
5029 | character on a terminal frame, or (iii) a line end. For the | |
5030 | second case, IT->nglyphs - 1 padding glyphs will be present | |
5031 | (on X frames, there is only one glyph produced for a | |
5032 | composite character. | |
5033 | ||
5034 | The behavior implemented below means, for continuation lines, | |
5035 | that as many spaces of a TAB as fit on the current line are | |
5036 | displayed there. For terminal frames, as many glyphs of a | |
5037 | multi-glyph character are displayed in the current line, too. | |
5038 | This is what the old redisplay code did, and we keep it that | |
5039 | way. Under X, the whole shape of a complex character must | |
5040 | fit on the line or it will be completely displayed in the | |
5041 | next line. | |
5042 | ||
5043 | Note that both for tabs and padding glyphs, all glyphs have | |
5044 | the same width. */ | |
5045 | if (it->nglyphs) | |
5046 | { | |
5047 | /* More than one glyph or glyph doesn't fit on line. All | |
5048 | glyphs have the same width. */ | |
5049 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
5050 | int new_x; | |
5051 | ||
5052 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
5053 | { | |
5054 | new_x = x + single_glyph_width; | |
5055 | ||
5056 | /* We want to leave anything reaching TO_X to the caller. */ | |
5057 | if ((op & MOVE_TO_X) && new_x > to_x) | |
5058 | { | |
5059 | it->current_x = x; | |
5060 | result = MOVE_X_REACHED; | |
5061 | break; | |
5062 | } | |
5063 | else if (/* Lines are continued. */ | |
5064 | !it->truncate_lines_p | |
5065 | && (/* And glyph doesn't fit on the line. */ | |
5066 | new_x > it->last_visible_x | |
5067 | /* Or it fits exactly and we're on a window | |
5068 | system frame. */ | |
5069 | || (new_x == it->last_visible_x | |
5070 | && FRAME_WINDOW_P (it->f)))) | |
5071 | { | |
5072 | if (/* IT->hpos == 0 means the very first glyph | |
5073 | doesn't fit on the line, e.g. a wide image. */ | |
5074 | it->hpos == 0 | |
5075 | || (new_x == it->last_visible_x | |
5076 | && FRAME_WINDOW_P (it->f))) | |
5077 | { | |
5078 | ++it->hpos; | |
5079 | it->current_x = new_x; | |
5080 | if (i == it->nglyphs - 1) | |
cafafe0b | 5081 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5082 | } |
5083 | else | |
47589c8c GM |
5084 | { |
5085 | it->current_x = x; | |
5086 | it->max_ascent = ascent; | |
5087 | it->max_descent = descent; | |
5088 | } | |
5089 | ||
5090 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", | |
5091 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
5092 | result = MOVE_LINE_CONTINUED; |
5093 | break; | |
5094 | } | |
5095 | else if (new_x > it->first_visible_x) | |
5096 | { | |
5097 | /* Glyph is visible. Increment number of glyphs that | |
5098 | would be displayed. */ | |
5099 | ++it->hpos; | |
5100 | } | |
5101 | else | |
5102 | { | |
5103 | /* Glyph is completely off the left margin of the display | |
5104 | area. Nothing to do. */ | |
5105 | } | |
5106 | } | |
5107 | ||
5108 | if (result != MOVE_UNDEFINED) | |
5109 | break; | |
5110 | } | |
5111 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
5112 | { | |
5113 | /* Stop when TO_X specified and reached. This check is | |
5114 | necessary here because of lines consisting of a line end, | |
5115 | only. The line end will not produce any glyphs and we | |
5116 | would never get MOVE_X_REACHED. */ | |
5117 | xassert (it->nglyphs == 0); | |
5118 | result = MOVE_X_REACHED; | |
5119 | break; | |
5120 | } | |
5121 | ||
5122 | /* Is this a line end? If yes, we're done. */ | |
5123 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5124 | { | |
5125 | result = MOVE_NEWLINE_OR_CR; | |
5126 | break; | |
5127 | } | |
5128 | ||
5129 | /* The current display element has been consumed. Advance | |
5130 | to the next. */ | |
cafafe0b | 5131 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5132 | |
5133 | /* Stop if lines are truncated and IT's current x-position is | |
5134 | past the right edge of the window now. */ | |
5135 | if (it->truncate_lines_p | |
5136 | && it->current_x >= it->last_visible_x) | |
5137 | { | |
5138 | result = MOVE_LINE_TRUNCATED; | |
5139 | break; | |
5140 | } | |
5141 | } | |
5142 | ||
5143 | /* Restore the iterator settings altered at the beginning of this | |
5144 | function. */ | |
5145 | it->glyph_row = saved_glyph_row; | |
5146 | return result; | |
5147 | } | |
5148 | ||
5149 | ||
9b2bba76 RS |
5150 | /* Move IT forward until it satisfies one or more of the criteria in |
5151 | TO_CHARPOS, TO_X, TO_Y, and TO_VPOS. | |
5152 | ||
5153 | OP is a bit-mask that specifies where to stop, and in particular, | |
5154 | which of those four position arguments makes a difference. See the | |
5155 | description of enum move_operation_enum. | |
5f5c8ee5 GM |
5156 | |
5157 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
5158 | screen line, this function will set IT to the next position > | |
5159 | TO_CHARPOS. */ | |
5160 | ||
5161 | void | |
5162 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
5163 | struct it *it; | |
5164 | int to_charpos, to_x, to_y, to_vpos; | |
5165 | int op; | |
5166 | { | |
5167 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
5168 | int line_height; | |
47589c8c | 5169 | int reached = 0; |
5f5c8ee5 | 5170 | |
47589c8c | 5171 | for (;;) |
5f5c8ee5 GM |
5172 | { |
5173 | if (op & MOVE_TO_VPOS) | |
5174 | { | |
5175 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
5176 | start of the line TO_VPOS. */ | |
5177 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
5178 | { | |
5179 | if (it->vpos == to_vpos) | |
47589c8c GM |
5180 | { |
5181 | reached = 1; | |
5182 | break; | |
5183 | } | |
5184 | else | |
5185 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
5186 | } |
5187 | else | |
5188 | { | |
5189 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
5190 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
5191 | if (it->vpos == to_vpos) |
5192 | { | |
5193 | reached = 2; | |
5194 | break; | |
5195 | } | |
5196 | ||
5f5c8ee5 GM |
5197 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
5198 | ||
5199 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
5200 | { |
5201 | reached = 3; | |
5202 | break; | |
5203 | } | |
5f5c8ee5 GM |
5204 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
5205 | { | |
5206 | /* We have reached TO_X but not in the line we want. */ | |
5207 | skip = move_it_in_display_line_to (it, to_charpos, | |
5208 | -1, MOVE_TO_POS); | |
5209 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5210 | { |
5211 | reached = 4; | |
5212 | break; | |
5213 | } | |
5f5c8ee5 GM |
5214 | } |
5215 | } | |
5216 | } | |
5217 | else if (op & MOVE_TO_Y) | |
5218 | { | |
5219 | struct it it_backup; | |
5f5c8ee5 GM |
5220 | |
5221 | /* TO_Y specified means stop at TO_X in the line containing | |
5222 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
5223 | problem is that we can't really tell whether the line | |
5224 | contains TO_Y before we have completely scanned it, and | |
5225 | this may skip past TO_X. What we do is to first scan to | |
5226 | TO_X. | |
5227 | ||
5228 | If TO_X is not specified, use a TO_X of zero. The reason | |
5229 | is to make the outcome of this function more predictable. | |
5230 | If we didn't use TO_X == 0, we would stop at the end of | |
5231 | the line which is probably not what a caller would expect | |
5232 | to happen. */ | |
5233 | skip = move_it_in_display_line_to (it, to_charpos, | |
5234 | ((op & MOVE_TO_X) | |
5235 | ? to_x : 0), | |
5236 | (MOVE_TO_X | |
5237 | | (op & MOVE_TO_POS))); | |
5238 | ||
5239 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
5240 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5241 | { |
5242 | reached = 5; | |
5243 | break; | |
5244 | } | |
5f5c8ee5 GM |
5245 | |
5246 | /* If TO_X was reached, we would like to know whether TO_Y | |
5247 | is in the line. This can only be said if we know the | |
5248 | total line height which requires us to scan the rest of | |
5249 | the line. */ | |
5f5c8ee5 GM |
5250 | if (skip == MOVE_X_REACHED) |
5251 | { | |
5252 | it_backup = *it; | |
47589c8c | 5253 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5254 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
5255 | op & MOVE_TO_POS); | |
47589c8c | 5256 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5257 | } |
5258 | ||
5259 | /* Now, decide whether TO_Y is in this line. */ | |
5260 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 5261 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
5f5c8ee5 GM |
5262 | |
5263 | if (to_y >= it->current_y | |
5264 | && to_y < it->current_y + line_height) | |
5265 | { | |
5266 | if (skip == MOVE_X_REACHED) | |
5267 | /* If TO_Y is in this line and TO_X was reached above, | |
5268 | we scanned too far. We have to restore IT's settings | |
5269 | to the ones before skipping. */ | |
5270 | *it = it_backup; | |
47589c8c | 5271 | reached = 6; |
5f5c8ee5 GM |
5272 | } |
5273 | else if (skip == MOVE_X_REACHED) | |
5274 | { | |
5275 | skip = skip2; | |
5276 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 5277 | reached = 7; |
5f5c8ee5 GM |
5278 | } |
5279 | ||
47589c8c | 5280 | if (reached) |
5f5c8ee5 GM |
5281 | break; |
5282 | } | |
5283 | else | |
5284 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
5285 | ||
5286 | switch (skip) | |
5287 | { | |
5288 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
5289 | reached = 8; |
5290 | goto out; | |
5f5c8ee5 GM |
5291 | |
5292 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 5293 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5294 | it->continuation_lines_width = 0; |
5295 | break; | |
5296 | ||
5297 | case MOVE_LINE_TRUNCATED: | |
5298 | it->continuation_lines_width = 0; | |
312246d1 | 5299 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5300 | if ((op & MOVE_TO_POS) != 0 |
5301 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
5302 | { |
5303 | reached = 9; | |
5304 | goto out; | |
5305 | } | |
5f5c8ee5 GM |
5306 | break; |
5307 | ||
5308 | case MOVE_LINE_CONTINUED: | |
5309 | it->continuation_lines_width += it->current_x; | |
5310 | break; | |
5311 | ||
5312 | default: | |
5313 | abort (); | |
5314 | } | |
5315 | ||
5316 | /* Reset/increment for the next run. */ | |
5317 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
5318 | it->current_x = it->hpos = 0; | |
5319 | it->current_y += it->max_ascent + it->max_descent; | |
5320 | ++it->vpos; | |
5321 | last_height = it->max_ascent + it->max_descent; | |
5322 | last_max_ascent = it->max_ascent; | |
5323 | it->max_ascent = it->max_descent = 0; | |
5324 | } | |
47589c8c GM |
5325 | |
5326 | out: | |
5327 | ||
5328 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
5329 | } |
5330 | ||
5331 | ||
5332 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
5333 | ||
5334 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
5335 | means move IT backward to the preceding line start or BEGV. This | |
5336 | function may move over more than DY pixels if IT->current_y - DY | |
5337 | ends up in the middle of a line; in this case IT->current_y will be | |
5338 | set to the top of the line moved to. */ | |
5339 | ||
5340 | void | |
5341 | move_it_vertically_backward (it, dy) | |
5342 | struct it *it; | |
5343 | int dy; | |
5344 | { | |
79ddf6f7 GM |
5345 | int nlines, h; |
5346 | struct it it2, it3; | |
5f5c8ee5 GM |
5347 | int start_pos = IT_CHARPOS (*it); |
5348 | ||
5349 | xassert (dy >= 0); | |
5350 | ||
5351 | /* Estimate how many newlines we must move back. */ | |
5352 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
5353 | ||
5354 | /* Set the iterator's position that many lines back. */ | |
5355 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
5356 | back_to_previous_visible_line_start (it); | |
5357 | ||
5358 | /* Reseat the iterator here. When moving backward, we don't want | |
5359 | reseat to skip forward over invisible text, set up the iterator | |
5360 | to deliver from overlay strings at the new position etc. So, | |
5361 | use reseat_1 here. */ | |
5362 | reseat_1 (it, it->current.pos, 1); | |
5363 | ||
5364 | /* We are now surely at a line start. */ | |
5365 | it->current_x = it->hpos = 0; | |
5366 | ||
5367 | /* Move forward and see what y-distance we moved. First move to the | |
5368 | start of the next line so that we get its height. We need this | |
5369 | height to be able to tell whether we reached the specified | |
5370 | y-distance. */ | |
5371 | it2 = *it; | |
5372 | it2.max_ascent = it2.max_descent = 0; | |
5373 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
5374 | MOVE_TO_POS | MOVE_TO_VPOS); | |
5375 | xassert (IT_CHARPOS (*it) >= BEGV); | |
79ddf6f7 | 5376 | it3 = it2; |
47589c8c | 5377 | |
5f5c8ee5 GM |
5378 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
5379 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5380 | h = it2.current_y - it->current_y; | |
5381 | nlines = it2.vpos - it->vpos; | |
5382 | ||
5383 | /* Correct IT's y and vpos position. */ | |
5384 | it->vpos -= nlines; | |
5385 | it->current_y -= h; | |
5386 | ||
5387 | if (dy == 0) | |
5388 | { | |
5389 | /* DY == 0 means move to the start of the screen line. The | |
5390 | value of nlines is > 0 if continuation lines were involved. */ | |
5391 | if (nlines > 0) | |
5392 | move_it_by_lines (it, nlines, 1); | |
5393 | xassert (IT_CHARPOS (*it) <= start_pos); | |
5394 | } | |
5395 | else if (nlines) | |
5396 | { | |
5397 | /* The y-position we try to reach. Note that h has been | |
5398 | subtracted in front of the if-statement. */ | |
5399 | int target_y = it->current_y + h - dy; | |
79ddf6f7 GM |
5400 | int y0 = it3.current_y; |
5401 | int y1 = line_bottom_y (&it3); | |
5402 | int line_height = y1 - y0; | |
f7ccfc8c | 5403 | |
5f5c8ee5 GM |
5404 | /* If we did not reach target_y, try to move further backward if |
5405 | we can. If we moved too far backward, try to move forward. */ | |
5406 | if (target_y < it->current_y | |
79ddf6f7 GM |
5407 | /* This is heuristic. In a window that's 3 lines high, with |
5408 | a line height of 13 pixels each, recentering with point | |
5409 | on the bottom line will try to move -39/2 = 19 pixels | |
5410 | backward. Try to avoid moving into the first line. */ | |
798dbe1f | 5411 | && it->current_y - target_y > line_height / 3 * 2 |
5f5c8ee5 GM |
5412 | && IT_CHARPOS (*it) > BEGV) |
5413 | { | |
f7ccfc8c GM |
5414 | TRACE_MOVE ((stderr, " not far enough -> move_vert %d\n", |
5415 | target_y - it->current_y)); | |
5f5c8ee5 GM |
5416 | move_it_vertically (it, target_y - it->current_y); |
5417 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5418 | } | |
5419 | else if (target_y >= it->current_y + line_height | |
5420 | && IT_CHARPOS (*it) < ZV) | |
5421 | { | |
55591976 GM |
5422 | /* Should move forward by at least one line, maybe more. |
5423 | ||
5424 | Note: Calling move_it_by_lines can be expensive on | |
5425 | terminal frames, where compute_motion is used (via | |
5426 | vmotion) to do the job, when there are very long lines | |
5427 | and truncate-lines is nil. That's the reason for | |
5428 | treating terminal frames specially here. */ | |
5429 | ||
5430 | if (!FRAME_WINDOW_P (it->f)) | |
5431 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
5432 | else | |
f7ccfc8c | 5433 | { |
55591976 GM |
5434 | do |
5435 | { | |
5436 | move_it_by_lines (it, 1, 1); | |
5437 | } | |
5438 | while (target_y >= line_bottom_y (it) && IT_CHARPOS (*it) < ZV); | |
f7ccfc8c | 5439 | } |
f7ccfc8c | 5440 | |
5f5c8ee5 GM |
5441 | xassert (IT_CHARPOS (*it) >= BEGV); |
5442 | } | |
5443 | } | |
5444 | } | |
5445 | ||
5446 | ||
5447 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
5448 | move backwards. DY = 0 means move to start of screen line. At the | |
5449 | end, IT will be on the start of a screen line. */ | |
5450 | ||
5451 | void | |
5452 | move_it_vertically (it, dy) | |
5453 | struct it *it; | |
5454 | int dy; | |
5455 | { | |
5456 | if (dy <= 0) | |
5457 | move_it_vertically_backward (it, -dy); | |
5458 | else if (dy > 0) | |
5459 | { | |
47589c8c | 5460 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
5461 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
5462 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 5463 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5464 | |
5465 | /* If buffer ends in ZV without a newline, move to the start of | |
5466 | the line to satisfy the post-condition. */ | |
5467 | if (IT_CHARPOS (*it) == ZV | |
5468 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
5469 | move_it_by_lines (it, 0, 0); | |
5470 | } | |
5471 | } | |
5472 | ||
5473 | ||
47fc2c10 GM |
5474 | /* Move iterator IT past the end of the text line it is in. */ |
5475 | ||
5476 | void | |
5477 | move_it_past_eol (it) | |
5478 | struct it *it; | |
5479 | { | |
5480 | enum move_it_result rc; | |
5481 | ||
5482 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); | |
5483 | if (rc == MOVE_NEWLINE_OR_CR) | |
5484 | set_iterator_to_next (it, 0); | |
5485 | } | |
5486 | ||
5487 | ||
2c79b732 GM |
5488 | #if 0 /* Currently not used. */ |
5489 | ||
5f5c8ee5 GM |
5490 | /* Return non-zero if some text between buffer positions START_CHARPOS |
5491 | and END_CHARPOS is invisible. IT->window is the window for text | |
5492 | property lookup. */ | |
5493 | ||
5494 | static int | |
5495 | invisible_text_between_p (it, start_charpos, end_charpos) | |
5496 | struct it *it; | |
5497 | int start_charpos, end_charpos; | |
5498 | { | |
5f5c8ee5 GM |
5499 | Lisp_Object prop, limit; |
5500 | int invisible_found_p; | |
5501 | ||
5502 | xassert (it != NULL && start_charpos <= end_charpos); | |
5503 | ||
5504 | /* Is text at START invisible? */ | |
5505 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
5506 | it->window); | |
5507 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
5508 | invisible_found_p = 1; | |
5509 | else | |
5510 | { | |
016b5642 MB |
5511 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
5512 | Qinvisible, Qnil, | |
5513 | make_number (end_charpos)); | |
5f5c8ee5 GM |
5514 | invisible_found_p = XFASTINT (limit) < end_charpos; |
5515 | } | |
5516 | ||
5517 | return invisible_found_p; | |
5f5c8ee5 GM |
5518 | } |
5519 | ||
2c79b732 GM |
5520 | #endif /* 0 */ |
5521 | ||
5f5c8ee5 GM |
5522 | |
5523 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
5524 | negative means move up. DVPOS == 0 means move to the start of the | |
5525 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
5526 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
5527 | ||
5528 | Further optimization ideas: If we would know that IT->f doesn't use | |
5529 | a face with proportional font, we could be faster for | |
5530 | truncate-lines nil. */ | |
5531 | ||
5532 | void | |
5533 | move_it_by_lines (it, dvpos, need_y_p) | |
5534 | struct it *it; | |
5535 | int dvpos, need_y_p; | |
5536 | { | |
5537 | struct position pos; | |
5538 | ||
5539 | if (!FRAME_WINDOW_P (it->f)) | |
5540 | { | |
5541 | struct text_pos textpos; | |
5542 | ||
5543 | /* We can use vmotion on frames without proportional fonts. */ | |
5544 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
5545 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
5546 | reseat (it, textpos, 1); | |
5547 | it->vpos += pos.vpos; | |
5548 | it->current_y += pos.vpos; | |
5549 | } | |
5550 | else if (dvpos == 0) | |
5551 | { | |
5552 | /* DVPOS == 0 means move to the start of the screen line. */ | |
5553 | move_it_vertically_backward (it, 0); | |
5554 | xassert (it->current_x == 0 && it->hpos == 0); | |
5555 | } | |
5556 | else if (dvpos > 0) | |
2c79b732 | 5557 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); |
5f5c8ee5 GM |
5558 | else |
5559 | { | |
5560 | struct it it2; | |
5561 | int start_charpos, i; | |
2c79b732 | 5562 | |
e8660d73 GM |
5563 | /* Start at the beginning of the screen line containing IT's |
5564 | position. */ | |
5565 | move_it_vertically_backward (it, 0); | |
b0e619b4 | 5566 | |
5f5c8ee5 GM |
5567 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
5568 | start_charpos = IT_CHARPOS (*it); | |
5569 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
5570 | back_to_previous_visible_line_start (it); | |
5571 | reseat (it, it->current.pos, 1); | |
5572 | it->current_x = it->hpos = 0; | |
5573 | ||
5574 | /* Above call may have moved too far if continuation lines | |
5575 | are involved. Scan forward and see if it did. */ | |
5576 | it2 = *it; | |
5577 | it2.vpos = it2.current_y = 0; | |
5578 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
5579 | it->vpos -= it2.vpos; | |
5580 | it->current_y -= it2.current_y; | |
5581 | it->current_x = it->hpos = 0; | |
5582 | ||
5583 | /* If we moved too far, move IT some lines forward. */ | |
5584 | if (it2.vpos > -dvpos) | |
5585 | { | |
5586 | int delta = it2.vpos + dvpos; | |
5587 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
5588 | } | |
5589 | } | |
5590 | } | |
5591 | ||
5592 | ||
5593 | \f | |
5594 | /*********************************************************************** | |
5595 | Messages | |
5596 | ***********************************************************************/ | |
5597 | ||
5598 | ||
937248bc GM |
5599 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
5600 | to *Messages*. */ | |
5601 | ||
5602 | void | |
5603 | add_to_log (format, arg1, arg2) | |
5604 | char *format; | |
5605 | Lisp_Object arg1, arg2; | |
5606 | { | |
5607 | Lisp_Object args[3]; | |
5608 | Lisp_Object msg, fmt; | |
5609 | char *buffer; | |
5610 | int len; | |
5611 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5612 | ||
ae794295 GM |
5613 | /* Do nothing if called asynchronously. Inserting text into |
5614 | a buffer may call after-change-functions and alike and | |
5615 | that would means running Lisp asynchronously. */ | |
5616 | if (handling_signal) | |
5617 | return; | |
5618 | ||
937248bc GM |
5619 | fmt = msg = Qnil; |
5620 | GCPRO4 (fmt, msg, arg1, arg2); | |
5621 | ||
5622 | args[0] = fmt = build_string (format); | |
5623 | args[1] = arg1; | |
5624 | args[2] = arg2; | |
6fc556fd | 5625 | msg = Fformat (3, args); |
937248bc | 5626 | |
2051c264 | 5627 | len = SBYTES (msg) + 1; |
937248bc | 5628 | buffer = (char *) alloca (len); |
2051c264 | 5629 | bcopy (SDATA (msg), buffer, len); |
937248bc | 5630 | |
796184bc | 5631 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
5632 | UNGCPRO; |
5633 | } | |
5634 | ||
5635 | ||
5f5c8ee5 GM |
5636 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
5637 | ||
5638 | void | |
5639 | message_log_maybe_newline () | |
5640 | { | |
5641 | if (message_log_need_newline) | |
5642 | message_dolog ("", 0, 1, 0); | |
5643 | } | |
5644 | ||
5645 | ||
1e313f28 | 5646 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
5647 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
5648 | nonzero, means interpret the contents of M as multibyte. This | |
5649 | function calls low-level routines in order to bypass text property | |
5650 | hooks, etc. which might not be safe to run. */ | |
5651 | ||
5652 | void | |
1e313f28 | 5653 | message_dolog (m, nbytes, nlflag, multibyte) |
5f5c8ee5 | 5654 | char *m; |
1e313f28 | 5655 | int nbytes, nlflag, multibyte; |
5f5c8ee5 GM |
5656 | { |
5657 | if (!NILP (Vmessage_log_max)) | |
5658 | { | |
5659 | struct buffer *oldbuf; | |
5660 | Lisp_Object oldpoint, oldbegv, oldzv; | |
5661 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
5662 | int point_at_end = 0; | |
5663 | int zv_at_end = 0; | |
5664 | Lisp_Object old_deactivate_mark, tem; | |
6052529b | 5665 | struct gcpro gcpro1; |
5f5c8ee5 GM |
5666 | |
5667 | old_deactivate_mark = Vdeactivate_mark; | |
5668 | oldbuf = current_buffer; | |
6a94510a | 5669 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
5670 | current_buffer->undo_list = Qt; |
5671 | ||
b14bc55e RS |
5672 | oldpoint = message_dolog_marker1; |
5673 | set_marker_restricted (oldpoint, make_number (PT), Qnil); | |
5674 | oldbegv = message_dolog_marker2; | |
5675 | set_marker_restricted (oldbegv, make_number (BEGV), Qnil); | |
5676 | oldzv = message_dolog_marker3; | |
5677 | set_marker_restricted (oldzv, make_number (ZV), Qnil); | |
5678 | GCPRO1 (old_deactivate_mark); | |
5f5c8ee5 GM |
5679 | |
5680 | if (PT == Z) | |
5681 | point_at_end = 1; | |
5682 | if (ZV == Z) | |
5683 | zv_at_end = 1; | |
5684 | ||
5685 | BEGV = BEG; | |
5686 | BEGV_BYTE = BEG_BYTE; | |
5687 | ZV = Z; | |
5688 | ZV_BYTE = Z_BYTE; | |
5689 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5690 | ||
5691 | /* Insert the string--maybe converting multibyte to single byte | |
5692 | or vice versa, so that all the text fits the buffer. */ | |
5693 | if (multibyte | |
5694 | && NILP (current_buffer->enable_multibyte_characters)) | |
5695 | { | |
1e313f28 | 5696 | int i, c, char_bytes; |
5f5c8ee5 GM |
5697 | unsigned char work[1]; |
5698 | ||
5699 | /* Convert a multibyte string to single-byte | |
5700 | for the *Message* buffer. */ | |
1e313f28 | 5701 | for (i = 0; i < nbytes; i += nbytes) |
5f5c8ee5 | 5702 | { |
1e313f28 | 5703 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
5704 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
5705 | ? c | |
5706 | : multibyte_char_to_unibyte (c, Qnil)); | |
5707 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5708 | } | |
5709 | } | |
5710 | else if (! multibyte | |
5711 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
5712 | { | |
1e313f28 | 5713 | int i, c, char_bytes; |
5f5c8ee5 | 5714 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 5715 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
5716 | /* Convert a single-byte string to multibyte |
5717 | for the *Message* buffer. */ | |
1e313f28 | 5718 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
5719 | { |
5720 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
5721 | char_bytes = CHAR_STRING (c, str); |
5722 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
5723 | } |
5724 | } | |
1e313f28 GM |
5725 | else if (nbytes) |
5726 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
5727 | |
5728 | if (nlflag) | |
5729 | { | |
5730 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
5731 | insert_1 ("\n", 1, 1, 0, 0); | |
5732 | ||
5733 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
5734 | this_bol = PT; | |
5735 | this_bol_byte = PT_BYTE; | |
5736 | ||
b14bc55e RS |
5737 | /* See if this line duplicates the previous one. |
5738 | If so, combine duplicates. */ | |
5f5c8ee5 GM |
5739 | if (this_bol > BEG) |
5740 | { | |
5741 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
5742 | prev_bol = PT; | |
5743 | prev_bol_byte = PT_BYTE; | |
5744 | ||
5745 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
5746 | this_bol, this_bol_byte); | |
5747 | if (dup) | |
5748 | { | |
5749 | del_range_both (prev_bol, prev_bol_byte, | |
5750 | this_bol, this_bol_byte, 0); | |
5751 | if (dup > 1) | |
5752 | { | |
5753 | char dupstr[40]; | |
5754 | int duplen; | |
5755 | ||
5756 | /* If you change this format, don't forget to also | |
5757 | change message_log_check_duplicate. */ | |
5758 | sprintf (dupstr, " [%d times]", dup); | |
5759 | duplen = strlen (dupstr); | |
5760 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
5761 | insert_1 (dupstr, duplen, 1, 0, 1); | |
5762 | } | |
5763 | } | |
5764 | } | |
5765 | ||
b14bc55e RS |
5766 | /* If we have more than the desired maximum number of lines |
5767 | in the *Messages* buffer now, delete the oldest ones. | |
5768 | This is safe because we don't have undo in this buffer. */ | |
5769 | ||
5f5c8ee5 GM |
5770 | if (NATNUMP (Vmessage_log_max)) |
5771 | { | |
5772 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
5773 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
5774 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
5775 | } | |
5776 | } | |
5777 | BEGV = XMARKER (oldbegv)->charpos; | |
5778 | BEGV_BYTE = marker_byte_position (oldbegv); | |
5779 | ||
5780 | if (zv_at_end) | |
5781 | { | |
5782 | ZV = Z; | |
5783 | ZV_BYTE = Z_BYTE; | |
5784 | } | |
5785 | else | |
5786 | { | |
5787 | ZV = XMARKER (oldzv)->charpos; | |
5788 | ZV_BYTE = marker_byte_position (oldzv); | |
5789 | } | |
5790 | ||
5791 | if (point_at_end) | |
5792 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5793 | else | |
5794 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
5795 | Lisp code. */ | |
5796 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
5797 | XMARKER (oldpoint)->bytepos); | |
5798 | ||
5799 | UNGCPRO; | |
b14bc55e RS |
5800 | unchain_marker (oldpoint); |
5801 | unchain_marker (oldbegv); | |
5802 | unchain_marker (oldzv); | |
5f5c8ee5 GM |
5803 | |
5804 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
5805 | set_buffer_internal (oldbuf); | |
5806 | if (NILP (tem)) | |
5807 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
5808 | message_log_need_newline = !nlflag; | |
5809 | Vdeactivate_mark = old_deactivate_mark; | |
5810 | } | |
5811 | } | |
5812 | ||
5813 | ||
5814 | /* We are at the end of the buffer after just having inserted a newline. | |
5815 | (Note: We depend on the fact we won't be crossing the gap.) | |
5816 | Check to see if the most recent message looks a lot like the previous one. | |
5817 | Return 0 if different, 1 if the new one should just replace it, or a | |
5818 | value N > 1 if we should also append " [N times]". */ | |
5819 | ||
5820 | static int | |
5821 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
5822 | int prev_bol, this_bol; | |
5823 | int prev_bol_byte, this_bol_byte; | |
5824 | { | |
5825 | int i; | |
5826 | int len = Z_BYTE - 1 - this_bol_byte; | |
5827 | int seen_dots = 0; | |
5828 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
5829 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
5830 | ||
5831 | for (i = 0; i < len; i++) | |
5832 | { | |
509633e3 | 5833 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
5834 | seen_dots = 1; |
5835 | if (p1[i] != p2[i]) | |
5836 | return seen_dots; | |
5837 | } | |
5838 | p1 += len; | |
5839 | if (*p1 == '\n') | |
5840 | return 2; | |
5841 | if (*p1++ == ' ' && *p1++ == '[') | |
5842 | { | |
5843 | int n = 0; | |
5844 | while (*p1 >= '0' && *p1 <= '9') | |
5845 | n = n * 10 + *p1++ - '0'; | |
5846 | if (strncmp (p1, " times]\n", 8) == 0) | |
5847 | return n+1; | |
5848 | } | |
5849 | return 0; | |
5850 | } | |
5851 | ||
5852 | ||
1e313f28 GM |
5853 | /* Display an echo area message M with a specified length of NBYTES |
5854 | bytes. The string may include null characters. If M is 0, clear | |
5855 | out any existing message, and let the mini-buffer text show | |
5856 | through. | |
5f5c8ee5 GM |
5857 | |
5858 | The buffer M must continue to exist until after the echo area gets | |
5859 | cleared or some other message gets displayed there. This means do | |
5860 | not pass text that is stored in a Lisp string; do not pass text in | |
5861 | a buffer that was alloca'd. */ | |
5862 | ||
5863 | void | |
1e313f28 | 5864 | message2 (m, nbytes, multibyte) |
5f5c8ee5 | 5865 | char *m; |
1e313f28 | 5866 | int nbytes; |
5f5c8ee5 GM |
5867 | int multibyte; |
5868 | { | |
5869 | /* First flush out any partial line written with print. */ | |
5870 | message_log_maybe_newline (); | |
5871 | if (m) | |
1e313f28 GM |
5872 | message_dolog (m, nbytes, 1, multibyte); |
5873 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5874 | } |
5875 | ||
5876 | ||
5877 | /* The non-logging counterpart of message2. */ | |
5878 | ||
5879 | void | |
1e313f28 | 5880 | message2_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5881 | char *m; |
1e313f28 | 5882 | int nbytes; |
5f5c8ee5 | 5883 | { |
886bd6f2 | 5884 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5885 | message_enable_multibyte = multibyte; |
5886 | ||
5887 | if (noninteractive) | |
5888 | { | |
5889 | if (noninteractive_need_newline) | |
5890 | putc ('\n', stderr); | |
5891 | noninteractive_need_newline = 0; | |
5892 | if (m) | |
1e313f28 | 5893 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
5894 | if (cursor_in_echo_area == 0) |
5895 | fprintf (stderr, "\n"); | |
5896 | fflush (stderr); | |
5897 | } | |
5898 | /* A null message buffer means that the frame hasn't really been | |
5899 | initialized yet. Error messages get reported properly by | |
5900 | cmd_error, so this must be just an informative message; toss it. */ | |
5901 | else if (INTERACTIVE | |
886bd6f2 GM |
5902 | && sf->glyphs_initialized_p |
5903 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5904 | { |
5905 | Lisp_Object mini_window; | |
5906 | struct frame *f; | |
5907 | ||
5908 | /* Get the frame containing the mini-buffer | |
5909 | that the selected frame is using. */ | |
886bd6f2 | 5910 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5911 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5912 | ||
5913 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5914 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
5915 | && ! FRAME_VISIBLE_P (f)) |
5916 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
5917 | ||
5918 | if (m) | |
5919 | { | |
1e313f28 | 5920 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
5921 | if (minibuffer_auto_raise) |
5922 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5923 | } | |
5924 | else | |
c6e89d6c | 5925 | clear_message (1, 1); |
5f5c8ee5 | 5926 | |
c6e89d6c | 5927 | do_pending_window_change (0); |
5f5c8ee5 | 5928 | echo_area_display (1); |
c6e89d6c | 5929 | do_pending_window_change (0); |
5f5c8ee5 GM |
5930 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5931 | (*frame_up_to_date_hook) (f); | |
5932 | } | |
5933 | } | |
5934 | ||
5935 | ||
c6e89d6c GM |
5936 | /* Display an echo area message M with a specified length of NBYTES |
5937 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
5938 | string, clear out any existing message, and let the mini-buffer |
5939 | text show through. */ | |
5940 | ||
5941 | void | |
c6e89d6c | 5942 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 5943 | Lisp_Object m; |
c6e89d6c | 5944 | int nbytes; |
5f5c8ee5 GM |
5945 | int multibyte; |
5946 | { | |
5947 | struct gcpro gcpro1; | |
5948 | ||
5949 | GCPRO1 (m); | |
5950 | ||
5951 | /* First flush out any partial line written with print. */ | |
5952 | message_log_maybe_newline (); | |
5953 | if (STRINGP (m)) | |
2051c264 | 5954 | message_dolog (SDATA (m), nbytes, 1, multibyte); |
c6e89d6c | 5955 | message3_nolog (m, nbytes, multibyte); |
5f5c8ee5 GM |
5956 | |
5957 | UNGCPRO; | |
5958 | } | |
5959 | ||
5960 | ||
5961 | /* The non-logging version of message3. */ | |
5962 | ||
5963 | void | |
c6e89d6c | 5964 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5965 | Lisp_Object m; |
c6e89d6c | 5966 | int nbytes, multibyte; |
5f5c8ee5 | 5967 | { |
886bd6f2 | 5968 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5969 | message_enable_multibyte = multibyte; |
5970 | ||
5971 | if (noninteractive) | |
5972 | { | |
5973 | if (noninteractive_need_newline) | |
5974 | putc ('\n', stderr); | |
5975 | noninteractive_need_newline = 0; | |
5976 | if (STRINGP (m)) | |
2051c264 | 5977 | fwrite (SDATA (m), nbytes, 1, stderr); |
5f5c8ee5 GM |
5978 | if (cursor_in_echo_area == 0) |
5979 | fprintf (stderr, "\n"); | |
5980 | fflush (stderr); | |
5981 | } | |
5982 | /* A null message buffer means that the frame hasn't really been | |
5983 | initialized yet. Error messages get reported properly by | |
5984 | cmd_error, so this must be just an informative message; toss it. */ | |
5985 | else if (INTERACTIVE | |
886bd6f2 GM |
5986 | && sf->glyphs_initialized_p |
5987 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5988 | { |
5989 | Lisp_Object mini_window; | |
c6e89d6c | 5990 | Lisp_Object frame; |
5f5c8ee5 GM |
5991 | struct frame *f; |
5992 | ||
5993 | /* Get the frame containing the mini-buffer | |
5994 | that the selected frame is using. */ | |
886bd6f2 | 5995 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5996 | frame = XWINDOW (mini_window)->frame; |
5997 | f = XFRAME (frame); | |
5f5c8ee5 GM |
5998 | |
5999 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 6000 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
6001 | && !FRAME_VISIBLE_P (f)) |
6002 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 6003 | |
2051c264 | 6004 | if (STRINGP (m) && SCHARS (m) > 0) |
5f5c8ee5 | 6005 | { |
c6e89d6c | 6006 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
6007 | if (minibuffer_auto_raise) |
6008 | Fraise_frame (frame); | |
5f5c8ee5 GM |
6009 | } |
6010 | else | |
c6e89d6c | 6011 | clear_message (1, 1); |
5f5c8ee5 | 6012 | |
c6e89d6c | 6013 | do_pending_window_change (0); |
5f5c8ee5 | 6014 | echo_area_display (1); |
c6e89d6c | 6015 | do_pending_window_change (0); |
5f5c8ee5 GM |
6016 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
6017 | (*frame_up_to_date_hook) (f); | |
6018 | } | |
6019 | } | |
6020 | ||
6021 | ||
6022 | /* Display a null-terminated echo area message M. If M is 0, clear | |
6023 | out any existing message, and let the mini-buffer text show through. | |
6024 | ||
6025 | The buffer M must continue to exist until after the echo area gets | |
6026 | cleared or some other message gets displayed there. Do not pass | |
6027 | text that is stored in a Lisp string. Do not pass text in a buffer | |
6028 | that was alloca'd. */ | |
6029 | ||
6030 | void | |
6031 | message1 (m) | |
6032 | char *m; | |
6033 | { | |
6034 | message2 (m, (m ? strlen (m) : 0), 0); | |
6035 | } | |
6036 | ||
6037 | ||
6038 | /* The non-logging counterpart of message1. */ | |
6039 | ||
6040 | void | |
6041 | message1_nolog (m) | |
6042 | char *m; | |
6043 | { | |
6044 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
6045 | } | |
6046 | ||
6047 | /* Display a message M which contains a single %s | |
6048 | which gets replaced with STRING. */ | |
6049 | ||
6050 | void | |
6051 | message_with_string (m, string, log) | |
6052 | char *m; | |
6053 | Lisp_Object string; | |
6054 | int log; | |
6055 | { | |
6056 | if (noninteractive) | |
6057 | { | |
6058 | if (m) | |
6059 | { | |
6060 | if (noninteractive_need_newline) | |
6061 | putc ('\n', stderr); | |
6062 | noninteractive_need_newline = 0; | |
2051c264 | 6063 | fprintf (stderr, m, SDATA (string)); |
5f5c8ee5 GM |
6064 | if (cursor_in_echo_area == 0) |
6065 | fprintf (stderr, "\n"); | |
6066 | fflush (stderr); | |
6067 | } | |
6068 | } | |
6069 | else if (INTERACTIVE) | |
6070 | { | |
6071 | /* The frame whose minibuffer we're going to display the message on. | |
6072 | It may be larger than the selected frame, so we need | |
6073 | to use its buffer, not the selected frame's buffer. */ | |
6074 | Lisp_Object mini_window; | |
886bd6f2 | 6075 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6076 | |
6077 | /* Get the frame containing the minibuffer | |
6078 | that the selected frame is using. */ | |
886bd6f2 | 6079 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6080 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6081 | ||
6082 | /* A null message buffer means that the frame hasn't really been | |
6083 | initialized yet. Error messages get reported properly by | |
6084 | cmd_error, so this must be just an informative message; toss it. */ | |
6085 | if (FRAME_MESSAGE_BUF (f)) | |
6086 | { | |
eb484132 GM |
6087 | Lisp_Object args[2], message; |
6088 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 6089 | |
eb484132 GM |
6090 | args[0] = build_string (m); |
6091 | args[1] = message = string; | |
78e17433 | 6092 | GCPRO2 (args[0], message); |
eb484132 GM |
6093 | gcpro1.nvars = 2; |
6094 | ||
6095 | message = Fformat (2, args); | |
5f5c8ee5 GM |
6096 | |
6097 | if (log) | |
2051c264 | 6098 | message3 (message, SBYTES (message), SMBP (message)); |
5f5c8ee5 | 6099 | else |
2051c264 | 6100 | message3_nolog (message, SBYTES (message), SMBP (message)); |
eb484132 GM |
6101 | |
6102 | UNGCPRO; | |
5f5c8ee5 GM |
6103 | |
6104 | /* Print should start at the beginning of the message | |
6105 | buffer next time. */ | |
6106 | message_buf_print = 0; | |
6107 | } | |
6108 | } | |
6109 | } | |
6110 | ||
6111 | ||
5f5c8ee5 GM |
6112 | /* Dump an informative message to the minibuf. If M is 0, clear out |
6113 | any existing message, and let the mini-buffer text show through. */ | |
6114 | ||
6115 | /* VARARGS 1 */ | |
6116 | void | |
6117 | message (m, a1, a2, a3) | |
6118 | char *m; | |
6119 | EMACS_INT a1, a2, a3; | |
6120 | { | |
6121 | if (noninteractive) | |
6122 | { | |
6123 | if (m) | |
6124 | { | |
6125 | if (noninteractive_need_newline) | |
6126 | putc ('\n', stderr); | |
6127 | noninteractive_need_newline = 0; | |
6128 | fprintf (stderr, m, a1, a2, a3); | |
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 mini-buffer we're going to display the message | |
6137 | on. It may be larger than the selected frame, so we need to | |
6138 | 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 mini-buffer | |
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 | |
6150 | it. */ | |
6151 | if (FRAME_MESSAGE_BUF (f)) | |
6152 | { | |
6153 | if (m) | |
6154 | { | |
6155 | int len; | |
6156 | #ifdef NO_ARG_ARRAY | |
6157 | char *a[3]; | |
6158 | a[0] = (char *) a1; | |
6159 | a[1] = (char *) a2; | |
6160 | a[2] = (char *) a3; | |
6161 | ||
6162 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6163 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6164 | #else | |
6165 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6166 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
6167 | (char **) &a1); | |
6168 | #endif /* NO_ARG_ARRAY */ | |
6169 | ||
6170 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
6171 | } | |
6172 | else | |
6173 | message1 (0); | |
6174 | ||
6175 | /* Print should start at the beginning of the message | |
6176 | buffer next time. */ | |
6177 | message_buf_print = 0; | |
6178 | } | |
6179 | } | |
6180 | } | |
6181 | ||
6182 | ||
6183 | /* The non-logging version of message. */ | |
6184 | ||
6185 | void | |
6186 | message_nolog (m, a1, a2, a3) | |
6187 | char *m; | |
6188 | EMACS_INT a1, a2, a3; | |
6189 | { | |
6190 | Lisp_Object old_log_max; | |
6191 | old_log_max = Vmessage_log_max; | |
6192 | Vmessage_log_max = Qnil; | |
6193 | message (m, a1, a2, a3); | |
6194 | Vmessage_log_max = old_log_max; | |
6195 | } | |
6196 | ||
6197 | ||
c6e89d6c GM |
6198 | /* Display the current message in the current mini-buffer. This is |
6199 | only called from error handlers in process.c, and is not time | |
6200 | critical. */ | |
5f5c8ee5 GM |
6201 | |
6202 | void | |
6203 | update_echo_area () | |
6204 | { | |
c6e89d6c GM |
6205 | if (!NILP (echo_area_buffer[0])) |
6206 | { | |
6207 | Lisp_Object string; | |
6208 | string = Fcurrent_message (); | |
2051c264 | 6209 | message3 (string, SBYTES (string), |
c6e89d6c GM |
6210 | !NILP (current_buffer->enable_multibyte_characters)); |
6211 | } | |
6212 | } | |
6213 | ||
6214 | ||
5bcfeb49 GM |
6215 | /* Make sure echo area buffers in echo_buffers[] are life. If they |
6216 | aren't, make new ones. */ | |
6217 | ||
6218 | static void | |
6219 | ensure_echo_area_buffers () | |
6220 | { | |
6221 | int i; | |
6222 | ||
6223 | for (i = 0; i < 2; ++i) | |
6224 | if (!BUFFERP (echo_buffer[i]) | |
6225 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
6226 | { | |
6227 | char name[30]; | |
ff3d9573 GM |
6228 | Lisp_Object old_buffer; |
6229 | int j; | |
6230 | ||
6231 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
6232 | sprintf (name, " *Echo Area %d*", i); |
6233 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 6234 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
6235 | |
6236 | for (j = 0; j < 2; ++j) | |
6237 | if (EQ (old_buffer, echo_area_buffer[j])) | |
6238 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
6239 | } |
6240 | } | |
6241 | ||
6242 | ||
23a96c77 | 6243 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
6244 | echo_area_buffer as current buffer. |
6245 | ||
6246 | WHICH zero means use the current message buffer | |
6247 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
6248 | from echo_buffer[] and clear it. | |
6249 | ||
6250 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
6251 | suitable buffer from echo_buffer[] and clear it. | |
6252 | ||
6253 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
6254 | that the current message becomes the last displayed one, make | |
6255 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
6256 | ||
4b41cebb | 6257 | Value is what FN returns. */ |
c6e89d6c GM |
6258 | |
6259 | static int | |
23a96c77 | 6260 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
6261 | struct window *w; |
6262 | int which; | |
23dd2d97 KR |
6263 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
6264 | EMACS_INT a1; | |
6265 | Lisp_Object a2; | |
6266 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6267 | { |
6268 | Lisp_Object buffer; | |
15e26c76 | 6269 | int this_one, the_other, clear_buffer_p, rc; |
2d27dae2 | 6270 | int count = BINDING_STACK_SIZE (); |
c6e89d6c GM |
6271 | |
6272 | /* If buffers aren't life, make new ones. */ | |
5bcfeb49 | 6273 | ensure_echo_area_buffers (); |
c6e89d6c GM |
6274 | |
6275 | clear_buffer_p = 0; | |
6276 | ||
6277 | if (which == 0) | |
6278 | this_one = 0, the_other = 1; | |
6279 | else if (which > 0) | |
6280 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 6281 | else |
c6e89d6c GM |
6282 | { |
6283 | this_one = 0, the_other = 1; | |
6284 | clear_buffer_p = 1; | |
6285 | ||
6286 | /* We need a fresh one in case the current echo buffer equals | |
6287 | the one containing the last displayed echo area message. */ | |
6288 | if (!NILP (echo_area_buffer[this_one]) | |
6289 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
6290 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
6291 | } |
6292 | ||
6293 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
6294 | have one. */ | |
6295 | if (NILP (echo_area_buffer[this_one])) | |
6296 | { | |
6297 | echo_area_buffer[this_one] | |
6298 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
6299 | ? echo_buffer[the_other] | |
6300 | : echo_buffer[this_one]); | |
6301 | clear_buffer_p = 1; | |
6302 | } | |
6303 | ||
6304 | buffer = echo_area_buffer[this_one]; | |
6305 | ||
1013f4e3 GM |
6306 | /* Don't get confused by reusing the buffer used for echoing |
6307 | for a different purpose. */ | |
032906b1 | 6308 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
6309 | cancel_echoing (); |
6310 | ||
c6e89d6c GM |
6311 | record_unwind_protect (unwind_with_echo_area_buffer, |
6312 | with_echo_area_buffer_unwind_data (w)); | |
6313 | ||
6314 | /* Make the echo area buffer current. Note that for display | |
6315 | purposes, it is not necessary that the displayed window's buffer | |
6316 | == current_buffer, except for text property lookup. So, let's | |
6317 | only set that buffer temporarily here without doing a full | |
6318 | Fset_window_buffer. We must also change w->pointm, though, | |
6319 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
6320 | aborts. */ | |
9142dd5b | 6321 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
6322 | if (w) |
6323 | { | |
6324 | w->buffer = buffer; | |
6325 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
6326 | } | |
ad4f174e | 6327 | |
c6e89d6c GM |
6328 | current_buffer->undo_list = Qt; |
6329 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 6330 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 6331 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
6332 | |
6333 | if (clear_buffer_p && Z > BEG) | |
6334 | del_range (BEG, Z); | |
6335 | ||
6336 | xassert (BEGV >= BEG); | |
6337 | xassert (ZV <= Z && ZV >= BEGV); | |
6338 | ||
23a96c77 | 6339 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
6340 | |
6341 | xassert (BEGV >= BEG); | |
6342 | xassert (ZV <= Z && ZV >= BEGV); | |
6343 | ||
6344 | unbind_to (count, Qnil); | |
6345 | return rc; | |
5f5c8ee5 GM |
6346 | } |
6347 | ||
6348 | ||
c6e89d6c GM |
6349 | /* Save state that should be preserved around the call to the function |
6350 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 6351 | |
c6e89d6c GM |
6352 | static Lisp_Object |
6353 | with_echo_area_buffer_unwind_data (w) | |
6354 | struct window *w; | |
5f5c8ee5 | 6355 | { |
c6e89d6c GM |
6356 | int i = 0; |
6357 | Lisp_Object vector; | |
5f5c8ee5 | 6358 | |
c6e89d6c GM |
6359 | /* Reduce consing by keeping one vector in |
6360 | Vwith_echo_area_save_vector. */ | |
6361 | vector = Vwith_echo_area_save_vector; | |
6362 | Vwith_echo_area_save_vector = Qnil; | |
6363 | ||
6364 | if (NILP (vector)) | |
9142dd5b | 6365 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c | 6366 | |
a61b7058 GM |
6367 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
6368 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
6369 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
c6e89d6c GM |
6370 | |
6371 | if (w) | |
6372 | { | |
a61b7058 GM |
6373 | XSETWINDOW (AREF (vector, i), w); ++i; |
6374 | AREF (vector, i) = w->buffer; ++i; | |
6375 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
6376 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
6377 | } |
6378 | else | |
6379 | { | |
6380 | int end = i + 4; | |
a61b7058 GM |
6381 | for (; i < end; ++i) |
6382 | AREF (vector, i) = Qnil; | |
c6e89d6c | 6383 | } |
5f5c8ee5 | 6384 | |
a61b7058 | 6385 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
6386 | return vector; |
6387 | } | |
5f5c8ee5 | 6388 | |
5f5c8ee5 | 6389 | |
c6e89d6c GM |
6390 | /* Restore global state from VECTOR which was created by |
6391 | with_echo_area_buffer_unwind_data. */ | |
6392 | ||
6393 | static Lisp_Object | |
6394 | unwind_with_echo_area_buffer (vector) | |
6395 | Lisp_Object vector; | |
6396 | { | |
bbbf6d06 GM |
6397 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
6398 | Vdeactivate_mark = AREF (vector, 1); | |
6399 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 6400 | |
bbbf6d06 | 6401 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
6402 | { |
6403 | struct window *w; | |
6404 | Lisp_Object buffer, charpos, bytepos; | |
6405 | ||
bbbf6d06 GM |
6406 | w = XWINDOW (AREF (vector, 3)); |
6407 | buffer = AREF (vector, 4); | |
6408 | charpos = AREF (vector, 5); | |
6409 | bytepos = AREF (vector, 6); | |
c6e89d6c GM |
6410 | |
6411 | w->buffer = buffer; | |
6412 | set_marker_both (w->pointm, buffer, | |
6413 | XFASTINT (charpos), XFASTINT (bytepos)); | |
6414 | } | |
6415 | ||
6416 | Vwith_echo_area_save_vector = vector; | |
6417 | return Qnil; | |
6418 | } | |
6419 | ||
6420 | ||
6421 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
6422 | non-zero means we will print multibyte. */ | |
6423 | ||
6424 | void | |
6425 | setup_echo_area_for_printing (multibyte_p) | |
6426 | int multibyte_p; | |
6427 | { | |
5bcfeb49 GM |
6428 | ensure_echo_area_buffers (); |
6429 | ||
c6e89d6c GM |
6430 | if (!message_buf_print) |
6431 | { | |
6432 | /* A message has been output since the last time we printed. | |
6433 | Choose a fresh echo area buffer. */ | |
6434 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
6435 | echo_area_buffer[0] = echo_buffer[1]; | |
6436 | else | |
6437 | echo_area_buffer[0] = echo_buffer[0]; | |
6438 | ||
6439 | /* Switch to that buffer and clear it. */ | |
6440 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 6441 | current_buffer->truncate_lines = Qnil; |
bbbf6d06 | 6442 | |
c6e89d6c | 6443 | if (Z > BEG) |
bbbf6d06 GM |
6444 | { |
6445 | int count = BINDING_STACK_SIZE (); | |
6446 | specbind (Qinhibit_read_only, Qt); | |
6447 | del_range (BEG, Z); | |
6448 | unbind_to (count, Qnil); | |
6449 | } | |
c6e89d6c GM |
6450 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6451 | ||
6452 | /* Set up the buffer for the multibyteness we need. */ | |
6453 | if (multibyte_p | |
6454 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6455 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
6456 | ||
6457 | /* Raise the frame containing the echo area. */ | |
6458 | if (minibuffer_auto_raise) | |
6459 | { | |
886bd6f2 | 6460 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6461 | Lisp_Object mini_window; |
886bd6f2 | 6462 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6463 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
6464 | } | |
6465 | ||
8a4e3c0c | 6466 | message_log_maybe_newline (); |
c6e89d6c GM |
6467 | message_buf_print = 1; |
6468 | } | |
fa77249f GM |
6469 | else |
6470 | { | |
6471 | if (NILP (echo_area_buffer[0])) | |
6472 | { | |
6473 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
6474 | echo_area_buffer[0] = echo_buffer[1]; | |
6475 | else | |
6476 | echo_area_buffer[0] = echo_buffer[0]; | |
6477 | } | |
6478 | ||
6479 | if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
ab2c5f0a GM |
6480 | { |
6481 | /* Someone switched buffers between print requests. */ | |
6482 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
6483 | current_buffer->truncate_lines = Qnil; | |
6484 | } | |
fa77249f | 6485 | } |
c6e89d6c GM |
6486 | } |
6487 | ||
6488 | ||
dd2eb166 GM |
6489 | /* Display an echo area message in window W. Value is non-zero if W's |
6490 | height is changed. If display_last_displayed_message_p is | |
6491 | non-zero, display the message that was last displayed, otherwise | |
6492 | display the current message. */ | |
c6e89d6c GM |
6493 | |
6494 | static int | |
6495 | display_echo_area (w) | |
6496 | struct window *w; | |
6497 | { | |
25edb08f GM |
6498 | int i, no_message_p, window_height_changed_p, count; |
6499 | ||
6500 | /* Temporarily disable garbage collections while displaying the echo | |
6501 | area. This is done because a GC can print a message itself. | |
6502 | That message would modify the echo area buffer's contents while a | |
6503 | redisplay of the buffer is going on, and seriously confuse | |
6504 | redisplay. */ | |
6505 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
6506 | |
6507 | /* If there is no message, we must call display_echo_area_1 | |
6508 | nevertheless because it resizes the window. But we will have to | |
6509 | reset the echo_area_buffer in question to nil at the end because | |
6510 | with_echo_area_buffer will sets it to an empty buffer. */ | |
6511 | i = display_last_displayed_message_p ? 1 : 0; | |
6512 | no_message_p = NILP (echo_area_buffer[i]); | |
6513 | ||
6514 | window_height_changed_p | |
6515 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 6516 | display_echo_area_1, |
23dd2d97 | 6517 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
6518 | |
6519 | if (no_message_p) | |
6520 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
6521 | |
6522 | unbind_to (count, Qnil); | |
dd2eb166 | 6523 | return window_height_changed_p; |
c6e89d6c GM |
6524 | } |
6525 | ||
6526 | ||
6527 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
6528 | contains the current echo area message in window W, a mini-window, |
6529 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
6530 | Change the height of W so that all of the message is displayed. |
6531 | Value is non-zero if height of W was changed. */ | |
6532 | ||
6533 | static int | |
23a96c77 | 6534 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6535 | EMACS_INT a1; |
6536 | Lisp_Object a2; | |
6537 | EMACS_INT a3, a4; | |
c6e89d6c | 6538 | { |
23a96c77 | 6539 | struct window *w = (struct window *) a1; |
c6e89d6c | 6540 | Lisp_Object window; |
c6e89d6c GM |
6541 | struct text_pos start; |
6542 | int window_height_changed_p = 0; | |
6543 | ||
6544 | /* Do this before displaying, so that we have a large enough glyph | |
6545 | matrix for the display. */ | |
92a90e89 | 6546 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
6547 | |
6548 | /* Display. */ | |
6549 | clear_glyph_matrix (w->desired_matrix); | |
6550 | XSETWINDOW (window, w); | |
6551 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
6552 | try_window (window, start); | |
6553 | ||
c6e89d6c GM |
6554 | return window_height_changed_p; |
6555 | } | |
6556 | ||
6557 | ||
92a90e89 | 6558 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
6559 | currently displayed message, if there is one. If a mini-buffer |
6560 | is active, don't shrink it. */ | |
92a90e89 GM |
6561 | |
6562 | void | |
308a74d8 | 6563 | resize_echo_area_exactly () |
92a90e89 GM |
6564 | { |
6565 | if (BUFFERP (echo_area_buffer[0]) | |
6566 | && WINDOWP (echo_area_window)) | |
6567 | { | |
6568 | struct window *w = XWINDOW (echo_area_window); | |
6569 | int resized_p; | |
6d004fea GM |
6570 | Lisp_Object resize_exactly; |
6571 | ||
6572 | if (minibuf_level == 0) | |
6573 | resize_exactly = Qt; | |
6574 | else | |
6575 | resize_exactly = Qnil; | |
92a90e89 | 6576 | |
23a96c77 | 6577 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 6578 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
6579 | if (resized_p) |
6580 | { | |
6581 | ++windows_or_buffers_changed; | |
6582 | ++update_mode_lines; | |
6583 | redisplay_internal (0); | |
6584 | } | |
6585 | } | |
6586 | } | |
6587 | ||
6588 | ||
23a96c77 | 6589 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 6590 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
6591 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
6592 | size of the text displayed. A3 and A4 are not used. Value is what | |
6593 | resize_mini_window returns. */ | |
23a96c77 GM |
6594 | |
6595 | static int | |
6d004fea | 6596 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 6597 | EMACS_INT a1; |
6d004fea | 6598 | Lisp_Object exactly; |
23dd2d97 | 6599 | EMACS_INT a3, a4; |
23a96c77 | 6600 | { |
6d004fea | 6601 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
6602 | } |
6603 | ||
6604 | ||
92a90e89 GM |
6605 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
6606 | means size the window exactly to the size needed. Otherwise, it's | |
6607 | only enlarged until W's buffer is empty. Value is non-zero if | |
4b41cebb | 6608 | the window height has been changed. */ |
c6e89d6c | 6609 | |
9472f927 | 6610 | int |
92a90e89 | 6611 | resize_mini_window (w, exact_p) |
c6e89d6c | 6612 | struct window *w; |
92a90e89 | 6613 | int exact_p; |
c6e89d6c GM |
6614 | { |
6615 | struct frame *f = XFRAME (w->frame); | |
6616 | int window_height_changed_p = 0; | |
6617 | ||
6618 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 6619 | |
2913a9c0 GM |
6620 | /* Don't resize windows while redisplaying a window; it would |
6621 | confuse redisplay functions when the size of the window they are | |
6622 | displaying changes from under them. Such a resizing can happen, | |
6623 | for instance, when which-func prints a long message while | |
6624 | we are running fontification-functions. We're running these | |
6625 | functions with safe_call which binds inhibit-redisplay to t. */ | |
6626 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 GM |
6627 | return 0; |
6628 | ||
97cafc0f | 6629 | /* Nil means don't try to resize. */ |
6422c1d7 | 6630 | if (NILP (Vresize_mini_windows) |
00f6d59e | 6631 | || (FRAME_X_P (f) && f->output_data.x == NULL)) |
97cafc0f | 6632 | return 0; |
c6e89d6c GM |
6633 | |
6634 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
6635 | { | |
6636 | struct it it; | |
dd2eb166 GM |
6637 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
6638 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
6639 | int height, max_height; | |
6640 | int unit = CANON_Y_UNIT (f); | |
6641 | struct text_pos start; | |
1bfdbe43 GM |
6642 | struct buffer *old_current_buffer = NULL; |
6643 | ||
6644 | if (current_buffer != XBUFFER (w->buffer)) | |
6645 | { | |
6646 | old_current_buffer = current_buffer; | |
6647 | set_buffer_internal (XBUFFER (w->buffer)); | |
6648 | } | |
9142dd5b | 6649 | |
c6e89d6c | 6650 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 6651 | |
dd2eb166 GM |
6652 | /* Compute the max. number of lines specified by the user. */ |
6653 | if (FLOATP (Vmax_mini_window_height)) | |
18f9986a | 6654 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_HEIGHT (f); |
dd2eb166 GM |
6655 | else if (INTEGERP (Vmax_mini_window_height)) |
6656 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
6657 | else |
6658 | max_height = total_height / 4; | |
dd2eb166 | 6659 | |
4b41cebb | 6660 | /* Correct that max. height if it's bogus. */ |
dd2eb166 GM |
6661 | max_height = max (1, max_height); |
6662 | max_height = min (total_height, max_height); | |
6663 | ||
6664 | /* Find out the height of the text in the window. */ | |
ad4f174e GM |
6665 | if (it.truncate_lines_p) |
6666 | height = 1; | |
55b064bd | 6667 | else |
ad4f174e GM |
6668 | { |
6669 | last_height = 0; | |
6670 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
6671 | if (it.max_ascent == 0 && it.max_descent == 0) | |
6672 | height = it.current_y + last_height; | |
6673 | else | |
6674 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 6675 | height -= it.extra_line_spacing; |
ad4f174e GM |
6676 | height = (height + unit - 1) / unit; |
6677 | } | |
dd2eb166 GM |
6678 | |
6679 | /* Compute a suitable window start. */ | |
6680 | if (height > max_height) | |
6681 | { | |
6682 | height = max_height; | |
6683 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
6684 | move_it_vertically_backward (&it, (height - 1) * unit); | |
6685 | start = it.current.pos; | |
6686 | } | |
6687 | else | |
6688 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
6689 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 6690 | |
6422c1d7 | 6691 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 6692 | { |
6422c1d7 GM |
6693 | /* Let it grow only, until we display an empty message, in which |
6694 | case the window shrinks again. */ | |
6695 | if (height > XFASTINT (w->height)) | |
6696 | { | |
6697 | int old_height = XFASTINT (w->height); | |
6698 | freeze_window_starts (f, 1); | |
6699 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6700 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6701 | } | |
6702 | else if (height < XFASTINT (w->height) | |
6703 | && (exact_p || BEGV == ZV)) | |
6704 | { | |
6705 | int old_height = XFASTINT (w->height); | |
6706 | freeze_window_starts (f, 0); | |
6707 | shrink_mini_window (w); | |
6708 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6709 | } | |
da448723 | 6710 | } |
6422c1d7 | 6711 | else |
da448723 | 6712 | { |
6422c1d7 GM |
6713 | /* Always resize to exact size needed. */ |
6714 | if (height > XFASTINT (w->height)) | |
6715 | { | |
6716 | int old_height = XFASTINT (w->height); | |
6717 | freeze_window_starts (f, 1); | |
6718 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6719 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6720 | } | |
6721 | else if (height < XFASTINT (w->height)) | |
6722 | { | |
6723 | int old_height = XFASTINT (w->height); | |
6724 | freeze_window_starts (f, 0); | |
6725 | shrink_mini_window (w); | |
6726 | ||
6727 | if (height) | |
6728 | { | |
6729 | freeze_window_starts (f, 1); | |
6730 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6731 | } | |
6732 | ||
6733 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6734 | } | |
9142dd5b | 6735 | } |
1bfdbe43 GM |
6736 | |
6737 | if (old_current_buffer) | |
6738 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
6739 | } |
6740 | ||
6741 | return window_height_changed_p; | |
6742 | } | |
6743 | ||
6744 | ||
6745 | /* Value is the current message, a string, or nil if there is no | |
6746 | current message. */ | |
6747 | ||
6748 | Lisp_Object | |
6749 | current_message () | |
6750 | { | |
6751 | Lisp_Object msg; | |
6752 | ||
6753 | if (NILP (echo_area_buffer[0])) | |
6754 | msg = Qnil; | |
6755 | else | |
6756 | { | |
23a96c77 | 6757 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 6758 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
6759 | if (NILP (msg)) |
6760 | echo_area_buffer[0] = Qnil; | |
6761 | } | |
6762 | ||
6763 | return msg; | |
6764 | } | |
6765 | ||
6766 | ||
6767 | static int | |
23a96c77 | 6768 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6769 | EMACS_INT a1; |
6770 | Lisp_Object a2; | |
6771 | EMACS_INT a3, a4; | |
c6e89d6c | 6772 | { |
23a96c77 GM |
6773 | Lisp_Object *msg = (Lisp_Object *) a1; |
6774 | ||
c6e89d6c GM |
6775 | if (Z > BEG) |
6776 | *msg = make_buffer_string (BEG, Z, 1); | |
6777 | else | |
6778 | *msg = Qnil; | |
6779 | return 0; | |
6780 | } | |
6781 | ||
6782 | ||
6783 | /* Push the current message on Vmessage_stack for later restauration | |
6784 | by restore_message. Value is non-zero if the current message isn't | |
6785 | empty. This is a relatively infrequent operation, so it's not | |
6786 | worth optimizing. */ | |
6787 | ||
6788 | int | |
6789 | push_message () | |
6790 | { | |
6791 | Lisp_Object msg; | |
6792 | msg = current_message (); | |
6793 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
6794 | return STRINGP (msg); | |
6795 | } | |
6796 | ||
6797 | ||
098ec84a GM |
6798 | /* Handler for record_unwind_protect calling pop_message. */ |
6799 | ||
6800 | Lisp_Object | |
6801 | push_message_unwind (dummy) | |
6802 | Lisp_Object dummy; | |
6803 | { | |
6804 | pop_message (); | |
6805 | return Qnil; | |
6806 | } | |
6807 | ||
6808 | ||
c6e89d6c GM |
6809 | /* Restore message display from the top of Vmessage_stack. */ |
6810 | ||
6811 | void | |
6812 | restore_message () | |
6813 | { | |
6814 | Lisp_Object msg; | |
6815 | ||
6816 | xassert (CONSP (Vmessage_stack)); | |
6817 | msg = XCAR (Vmessage_stack); | |
6818 | if (STRINGP (msg)) | |
2051c264 | 6819 | message3_nolog (msg, SBYTES (msg), SMBP (msg)); |
c6e89d6c GM |
6820 | else |
6821 | message3_nolog (msg, 0, 0); | |
6822 | } | |
6823 | ||
6824 | ||
6825 | /* Pop the top-most entry off Vmessage_stack. */ | |
6826 | ||
6827 | void | |
6828 | pop_message () | |
6829 | { | |
6830 | xassert (CONSP (Vmessage_stack)); | |
6831 | Vmessage_stack = XCDR (Vmessage_stack); | |
6832 | } | |
6833 | ||
6834 | ||
6835 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
6836 | exits. If the stack is not empty, we have a missing pop_message | |
6837 | somewhere. */ | |
6838 | ||
6839 | void | |
6840 | check_message_stack () | |
6841 | { | |
6842 | if (!NILP (Vmessage_stack)) | |
6843 | abort (); | |
6844 | } | |
6845 | ||
6846 | ||
6847 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
6848 | time we display it---but don't redisplay it now. */ | |
6849 | ||
6850 | void | |
6851 | truncate_echo_area (nchars) | |
6852 | int nchars; | |
6853 | { | |
6854 | if (nchars == 0) | |
6855 | echo_area_buffer[0] = Qnil; | |
6856 | /* A null message buffer means that the frame hasn't really been | |
6857 | initialized yet. Error messages get reported properly by | |
6858 | cmd_error, so this must be just an informative message; toss it. */ | |
6859 | else if (!noninteractive | |
6860 | && INTERACTIVE | |
c6e89d6c | 6861 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
6862 | { |
6863 | struct frame *sf = SELECTED_FRAME (); | |
6864 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 6865 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 6866 | } |
c6e89d6c GM |
6867 | } |
6868 | ||
6869 | ||
6870 | /* Helper function for truncate_echo_area. Truncate the current | |
6871 | message to at most NCHARS characters. */ | |
6872 | ||
6873 | static int | |
23a96c77 | 6874 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
6875 | EMACS_INT nchars; |
6876 | Lisp_Object a2; | |
6877 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6878 | { |
6879 | if (BEG + nchars < Z) | |
6880 | del_range (BEG + nchars, Z); | |
6881 | if (Z == BEG) | |
6882 | echo_area_buffer[0] = Qnil; | |
6883 | return 0; | |
6884 | } | |
6885 | ||
6886 | ||
6887 | /* Set the current message to a substring of S or STRING. | |
6888 | ||
6889 | If STRING is a Lisp string, set the message to the first NBYTES | |
6890 | bytes from STRING. NBYTES zero means use the whole string. If | |
6891 | STRING is multibyte, the message will be displayed multibyte. | |
6892 | ||
6893 | If S is not null, set the message to the first LEN bytes of S. LEN | |
6894 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
6895 | multibyte. Display the message multibyte in that case. */ | |
6896 | ||
6897 | void | |
6898 | set_message (s, string, nbytes, multibyte_p) | |
6899 | char *s; | |
6900 | Lisp_Object string; | |
6901 | int nbytes; | |
6902 | { | |
6903 | message_enable_multibyte | |
6904 | = ((s && multibyte_p) | |
6905 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
6906 | ||
23a96c77 GM |
6907 | with_echo_area_buffer (0, -1, set_message_1, |
6908 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c | 6909 | message_buf_print = 0; |
21fdfb65 | 6910 | help_echo_showing_p = 0; |
c6e89d6c GM |
6911 | } |
6912 | ||
6913 | ||
6914 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
6915 | as there, with A1 corresponding to S and A2 corresponding to STRING |
6916 | This function is called with the echo area buffer being | |
c6e89d6c GM |
6917 | current. */ |
6918 | ||
6919 | static int | |
23a96c77 | 6920 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
6921 | EMACS_INT a1; |
6922 | Lisp_Object a2; | |
6923 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 6924 | { |
23a96c77 | 6925 | char *s = (char *) a1; |
23dd2d97 | 6926 | Lisp_Object string = a2; |
23a96c77 | 6927 | |
c6e89d6c GM |
6928 | xassert (BEG == Z); |
6929 | ||
6930 | /* Change multibyteness of the echo buffer appropriately. */ | |
6931 | if (message_enable_multibyte | |
6932 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6933 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
6934 | ||
ad4f174e GM |
6935 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
6936 | ||
c6e89d6c GM |
6937 | /* Insert new message at BEG. */ |
6938 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
6939 | ||
6940 | if (STRINGP (string)) | |
6941 | { | |
6942 | int nchars; | |
6943 | ||
6944 | if (nbytes == 0) | |
2051c264 | 6945 | nbytes = SBYTES (string); |
c6e89d6c GM |
6946 | nchars = string_byte_to_char (string, nbytes); |
6947 | ||
6948 | /* This function takes care of single/multibyte conversion. We | |
6949 | just have to ensure that the echo area buffer has the right | |
6950 | setting of enable_multibyte_characters. */ | |
6951 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
6952 | } | |
6953 | else if (s) | |
6954 | { | |
6955 | if (nbytes == 0) | |
6956 | nbytes = strlen (s); | |
6957 | ||
6958 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
6959 | { | |
6960 | /* Convert from multi-byte to single-byte. */ | |
6961 | int i, c, n; | |
6962 | unsigned char work[1]; | |
6963 | ||
6964 | /* Convert a multibyte string to single-byte. */ | |
6965 | for (i = 0; i < nbytes; i += n) | |
6966 | { | |
6967 | c = string_char_and_length (s + i, nbytes - i, &n); | |
6968 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
6969 | ? c | |
6970 | : multibyte_char_to_unibyte (c, Qnil)); | |
6971 | insert_1_both (work, 1, 1, 1, 0, 0); | |
6972 | } | |
6973 | } | |
6974 | else if (!multibyte_p | |
6975 | && !NILP (current_buffer->enable_multibyte_characters)) | |
6976 | { | |
6977 | /* Convert from single-byte to multi-byte. */ | |
6978 | int i, c, n; | |
6979 | unsigned char *msg = (unsigned char *) s; | |
260a86a0 | 6980 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c6e89d6c GM |
6981 | |
6982 | /* Convert a single-byte string to multibyte. */ | |
6983 | for (i = 0; i < nbytes; i++) | |
6984 | { | |
6985 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
6986 | n = CHAR_STRING (c, str); |
6987 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
6988 | } |
6989 | } | |
6990 | else | |
6991 | insert_1 (s, nbytes, 1, 0, 0); | |
6992 | } | |
6993 | ||
6994 | return 0; | |
6995 | } | |
6996 | ||
6997 | ||
6998 | /* Clear messages. CURRENT_P non-zero means clear the current | |
6999 | message. LAST_DISPLAYED_P non-zero means clear the message | |
7000 | last displayed. */ | |
7001 | ||
7002 | void | |
7003 | clear_message (current_p, last_displayed_p) | |
7004 | int current_p, last_displayed_p; | |
7005 | { | |
7006 | if (current_p) | |
6e019995 GM |
7007 | { |
7008 | echo_area_buffer[0] = Qnil; | |
7009 | message_cleared_p = 1; | |
7010 | } | |
c6e89d6c GM |
7011 | |
7012 | if (last_displayed_p) | |
7013 | echo_area_buffer[1] = Qnil; | |
7014 | ||
7015 | message_buf_print = 0; | |
7016 | } | |
7017 | ||
7018 | /* Clear garbaged frames. | |
7019 | ||
7020 | This function is used where the old redisplay called | |
7021 | redraw_garbaged_frames which in turn called redraw_frame which in | |
7022 | turn called clear_frame. The call to clear_frame was a source of | |
7023 | flickering. I believe a clear_frame is not necessary. It should | |
7024 | suffice in the new redisplay to invalidate all current matrices, | |
7025 | and ensure a complete redisplay of all windows. */ | |
7026 | ||
7027 | static void | |
7028 | clear_garbaged_frames () | |
7029 | { | |
5f5c8ee5 GM |
7030 | if (frame_garbaged) |
7031 | { | |
5f5c8ee5 | 7032 | Lisp_Object tail, frame; |
5fb96e96 | 7033 | int changed_count = 0; |
5f5c8ee5 GM |
7034 | |
7035 | FOR_EACH_FRAME (tail, frame) | |
7036 | { | |
7037 | struct frame *f = XFRAME (frame); | |
7038 | ||
7039 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
7040 | { | |
6bb95882 | 7041 | if (f->resized_p) |
573e57f1 | 7042 | Fredraw_frame (frame); |
5f5c8ee5 | 7043 | clear_current_matrices (f); |
5fb96e96 | 7044 | changed_count++; |
5f5c8ee5 | 7045 | f->garbaged = 0; |
6bb95882 | 7046 | f->resized_p = 0; |
5f5c8ee5 GM |
7047 | } |
7048 | } | |
7049 | ||
7050 | frame_garbaged = 0; | |
5fb96e96 RS |
7051 | if (changed_count) |
7052 | ++windows_or_buffers_changed; | |
5f5c8ee5 | 7053 | } |
c6e89d6c | 7054 | } |
5f5c8ee5 | 7055 | |
5f5c8ee5 | 7056 | |
886bd6f2 GM |
7057 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
7058 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 7059 | mini-windows height has been changed. */ |
5f5c8ee5 | 7060 | |
c6e89d6c GM |
7061 | static int |
7062 | echo_area_display (update_frame_p) | |
7063 | int update_frame_p; | |
7064 | { | |
7065 | Lisp_Object mini_window; | |
7066 | struct window *w; | |
7067 | struct frame *f; | |
7068 | int window_height_changed_p = 0; | |
886bd6f2 | 7069 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7070 | |
886bd6f2 | 7071 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7072 | w = XWINDOW (mini_window); |
7073 | f = XFRAME (WINDOW_FRAME (w)); | |
7074 | ||
7075 | /* Don't display if frame is invisible or not yet initialized. */ | |
7076 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
7077 | return 0; | |
5f5c8ee5 | 7078 | |
1a578e9b | 7079 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
e0f712ba | 7080 | #ifndef MAC_OS8 |
1ab3e082 | 7081 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
7082 | /* When Emacs starts, selected_frame may be a visible terminal |
7083 | frame, even if we run under a window system. If we let this | |
7084 | through, a message would be displayed on the terminal. */ | |
622e3754 GM |
7085 | if (EQ (selected_frame, Vterminal_frame) |
7086 | && !NILP (Vwindow_system)) | |
c6e89d6c | 7087 | return 0; |
1ab3e082 | 7088 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 7089 | #endif |
c6e89d6c GM |
7090 | |
7091 | /* Redraw garbaged frames. */ | |
7092 | if (frame_garbaged) | |
7093 | clear_garbaged_frames (); | |
7094 | ||
7095 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
7096 | { | |
7097 | echo_area_window = mini_window; | |
7098 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 7099 | w->must_be_updated_p = 1; |
c59c668a | 7100 | |
d4358b37 GM |
7101 | /* Update the display, unless called from redisplay_internal. |
7102 | Also don't update the screen during redisplay itself. The | |
7103 | update will happen at the end of redisplay, and an update | |
7104 | here could cause confusion. */ | |
7105 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 7106 | { |
715e84c9 | 7107 | int n = 0; |
edc68111 | 7108 | |
715e84c9 GM |
7109 | /* If the display update has been interrupted by pending |
7110 | input, update mode lines in the frame. Due to the | |
7111 | pending input, it might have been that redisplay hasn't | |
7112 | been called, so that mode lines above the echo area are | |
7113 | garbaged. This looks odd, so we prevent it here. */ | |
7114 | if (!display_completed) | |
7115 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
7116 | ||
8af1308e GM |
7117 | if (window_height_changed_p |
7118 | /* Don't do this if Emacs is shutting down. Redisplay | |
7119 | needs to run hooks. */ | |
7120 | && !NILP (Vrun_hooks)) | |
c59c668a | 7121 | { |
c06017fb GM |
7122 | /* Must update other windows. Likewise as in other |
7123 | cases, don't let this update be interrupted by | |
7124 | pending input. */ | |
7125 | int count = BINDING_STACK_SIZE (); | |
7126 | specbind (Qredisplay_dont_pause, Qt); | |
edc68111 | 7127 | windows_or_buffers_changed = 1; |
c59c668a | 7128 | redisplay_internal (0); |
c06017fb | 7129 | unbind_to (count, Qnil); |
c59c668a | 7130 | } |
715e84c9 | 7131 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 7132 | { |
edc68111 | 7133 | /* Window configuration is the same as before. |
715e84c9 GM |
7134 | Can do with a display update of the echo area, |
7135 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
7136 | update_single_window (w, 1); |
7137 | rif->flush_display (f); | |
7138 | } | |
7139 | else | |
7140 | update_frame (f, 1, 1); | |
31b6671b GM |
7141 | |
7142 | /* If cursor is in the echo area, make sure that the next | |
7143 | redisplay displays the minibuffer, so that the cursor will | |
7144 | be replaced with what the minibuffer wants. */ | |
7145 | if (cursor_in_echo_area) | |
7146 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
7147 | } |
7148 | } | |
7149 | else if (!EQ (mini_window, selected_window)) | |
7150 | windows_or_buffers_changed++; | |
c59c668a GM |
7151 | |
7152 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
7153 | echo_area_buffer[1] = echo_area_buffer[0]; |
7154 | ||
5f5c8ee5 GM |
7155 | /* Prevent redisplay optimization in redisplay_internal by resetting |
7156 | this_line_start_pos. This is done because the mini-buffer now | |
7157 | displays the message instead of its buffer text. */ | |
7158 | if (EQ (mini_window, selected_window)) | |
7159 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
7160 | |
7161 | return window_height_changed_p; | |
5f5c8ee5 GM |
7162 | } |
7163 | ||
7164 | ||
7165 | \f | |
7166 | /*********************************************************************** | |
7167 | Frame Titles | |
7168 | ***********************************************************************/ | |
7169 | ||
7170 | ||
7171 | #ifdef HAVE_WINDOW_SYSTEM | |
7172 | ||
7173 | /* A buffer for constructing frame titles in it; allocated from the | |
7174 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
7175 | ||
7176 | static char *frame_title_buf; | |
7177 | ||
7178 | /* The buffer's end, and a current output position in it. */ | |
7179 | ||
7180 | static char *frame_title_buf_end; | |
7181 | static char *frame_title_ptr; | |
7182 | ||
7183 | ||
7184 | /* Store a single character C for the frame title in frame_title_buf. | |
7185 | Re-allocate frame_title_buf if necessary. */ | |
7186 | ||
7187 | static void | |
7188 | store_frame_title_char (c) | |
7189 | char c; | |
7190 | { | |
7191 | /* If output position has reached the end of the allocated buffer, | |
7192 | double the buffer's size. */ | |
7193 | if (frame_title_ptr == frame_title_buf_end) | |
7194 | { | |
7195 | int len = frame_title_ptr - frame_title_buf; | |
7196 | int new_size = 2 * len * sizeof *frame_title_buf; | |
7197 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
7198 | frame_title_buf_end = frame_title_buf + new_size; | |
7199 | frame_title_ptr = frame_title_buf + len; | |
7200 | } | |
7201 | ||
7202 | *frame_title_ptr++ = c; | |
7203 | } | |
7204 | ||
7205 | ||
7206 | /* Store part of a frame title in frame_title_buf, beginning at | |
d26b89b8 KH |
7207 | frame_title_ptr. STR is the string to store. Do not copy |
7208 | characters that yield more columns than PRECISION; PRECISION <= 0 | |
7209 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
7210 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
7211 | pad. Called from display_mode_element when it is used to build a | |
7212 | frame title. */ | |
5f5c8ee5 GM |
7213 | |
7214 | static int | |
7215 | store_frame_title (str, field_width, precision) | |
7216 | unsigned char *str; | |
7217 | int field_width, precision; | |
7218 | { | |
7219 | int n = 0; | |
3b552d56 | 7220 | int dummy, nbytes; |
5f5c8ee5 GM |
7221 | |
7222 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 KH |
7223 | nbytes = strlen (str); |
7224 | n+= c_string_width (str, nbytes, precision, &dummy, &nbytes); | |
7225 | while (nbytes--) | |
7226 | store_frame_title_char (*str++); | |
5f5c8ee5 GM |
7227 | |
7228 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
7229 | while (field_width > 0 | |
7230 | && n < field_width) | |
7231 | { | |
7232 | store_frame_title_char (' '); | |
7233 | ++n; | |
7234 | } | |
7235 | ||
7236 | return n; | |
7237 | } | |
7238 | ||
7239 | ||
7240 | /* Set the title of FRAME, if it has changed. The title format is | |
7241 | Vicon_title_format if FRAME is iconified, otherwise it is | |
7242 | frame_title_format. */ | |
7243 | ||
7244 | static void | |
7245 | x_consider_frame_title (frame) | |
7246 | Lisp_Object frame; | |
7247 | { | |
7248 | struct frame *f = XFRAME (frame); | |
7249 | ||
7250 | if (FRAME_WINDOW_P (f) | |
7251 | || FRAME_MINIBUF_ONLY_P (f) | |
7252 | || f->explicit_name) | |
7253 | { | |
7254 | /* Do we have more than one visible frame on this X display? */ | |
7255 | Lisp_Object tail; | |
7256 | Lisp_Object fmt; | |
7257 | struct buffer *obuf; | |
7258 | int len; | |
7259 | struct it it; | |
7260 | ||
9472f927 | 7261 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 7262 | { |
74779f52 JR |
7263 | Lisp_Object other_frame = XCAR (tail); |
7264 | struct frame *tf = XFRAME (other_frame); | |
5f5c8ee5 GM |
7265 | |
7266 | if (tf != f | |
7267 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
7268 | && !FRAME_MINIBUF_ONLY_P (tf) | |
74779f52 | 7269 | && !EQ (other_frame, tip_frame) |
5f5c8ee5 GM |
7270 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
7271 | break; | |
7272 | } | |
7273 | ||
7274 | /* Set global variable indicating that multiple frames exist. */ | |
7275 | multiple_frames = CONSP (tail); | |
7276 | ||
7277 | /* Switch to the buffer of selected window of the frame. Set up | |
7278 | frame_title_ptr so that display_mode_element will output into it; | |
7279 | then display the title. */ | |
7280 | obuf = current_buffer; | |
bb336f8d | 7281 | set_buffer_internal_1 (XBUFFER (XWINDOW (f->selected_window)->buffer)); |
5f5c8ee5 GM |
7282 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; |
7283 | frame_title_ptr = frame_title_buf; | |
7284 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
7285 | NULL, DEFAULT_FACE_ID); | |
c53a1624 | 7286 | display_mode_element (&it, 0, -1, -1, fmt, Qnil, 0); |
d26b89b8 | 7287 | len = frame_title_ptr - frame_title_buf; |
5f5c8ee5 | 7288 | frame_title_ptr = NULL; |
bb336f8d | 7289 | set_buffer_internal_1 (obuf); |
5f5c8ee5 GM |
7290 | |
7291 | /* Set the title only if it's changed. This avoids consing in | |
7292 | the common case where it hasn't. (If it turns out that we've | |
7293 | already wasted too much time by walking through the list with | |
7294 | display_mode_element, then we might need to optimize at a | |
7295 | higher level than this.) */ | |
7296 | if (! STRINGP (f->name) | |
2051c264 GM |
7297 | || SBYTES (f->name) != len |
7298 | || bcmp (frame_title_buf, SDATA (f->name), len) != 0) | |
5f5c8ee5 GM |
7299 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); |
7300 | } | |
7301 | } | |
7302 | ||
7303 | #else /* not HAVE_WINDOW_SYSTEM */ | |
7304 | ||
7305 | #define frame_title_ptr ((char *)0) | |
7306 | #define store_frame_title(str, mincol, maxcol) 0 | |
7307 | ||
7308 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
7309 | ||
7310 | ||
7311 | ||
7312 | \f | |
7313 | /*********************************************************************** | |
7314 | Menu Bars | |
7315 | ***********************************************************************/ | |
7316 | ||
7317 | ||
7318 | /* Prepare for redisplay by updating menu-bar item lists when | |
7319 | appropriate. This can call eval. */ | |
7320 | ||
7321 | void | |
7322 | prepare_menu_bars () | |
7323 | { | |
7324 | int all_windows; | |
7325 | struct gcpro gcpro1, gcpro2; | |
7326 | struct frame *f; | |
6b5c4794 | 7327 | Lisp_Object tooltip_frame; |
5f5c8ee5 | 7328 | |
86ffe5cd | 7329 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7330 | tooltip_frame = tip_frame; |
7331 | #else | |
6b5c4794 | 7332 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
7333 | #endif |
7334 | ||
7335 | /* Update all frame titles based on their buffer names, etc. We do | |
7336 | this before the menu bars so that the buffer-menu will show the | |
7337 | up-to-date frame titles. */ | |
7338 | #ifdef HAVE_WINDOW_SYSTEM | |
7339 | if (windows_or_buffers_changed || update_mode_lines) | |
7340 | { | |
7341 | Lisp_Object tail, frame; | |
7342 | ||
7343 | FOR_EACH_FRAME (tail, frame) | |
7344 | { | |
7345 | f = XFRAME (frame); | |
6b5c4794 | 7346 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
7347 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
7348 | x_consider_frame_title (frame); | |
7349 | } | |
7350 | } | |
7351 | #endif /* HAVE_WINDOW_SYSTEM */ | |
7352 | ||
7353 | /* Update the menu bar item lists, if appropriate. This has to be | |
7354 | done before any actual redisplay or generation of display lines. */ | |
7355 | all_windows = (update_mode_lines | |
7356 | || buffer_shared > 1 | |
7357 | || windows_or_buffers_changed); | |
7358 | if (all_windows) | |
7359 | { | |
7360 | Lisp_Object tail, frame; | |
2d27dae2 | 7361 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 GM |
7362 | |
7363 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7364 | ||
7365 | FOR_EACH_FRAME (tail, frame) | |
7366 | { | |
7367 | f = XFRAME (frame); | |
7368 | ||
7369 | /* Ignore tooltip frame. */ | |
6b5c4794 | 7370 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 GM |
7371 | continue; |
7372 | ||
7373 | /* If a window on this frame changed size, report that to | |
7374 | the user and clear the size-change flag. */ | |
7375 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
7376 | { | |
7377 | Lisp_Object functions; | |
7378 | ||
7379 | /* Clear flag first in case we get an error below. */ | |
7380 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
7381 | functions = Vwindow_size_change_functions; | |
7382 | GCPRO2 (tail, functions); | |
7383 | ||
7384 | while (CONSP (functions)) | |
7385 | { | |
7386 | call1 (XCAR (functions), frame); | |
7387 | functions = XCDR (functions); | |
7388 | } | |
7389 | UNGCPRO; | |
7390 | } | |
7391 | ||
7392 | GCPRO1 (tail); | |
7393 | update_menu_bar (f, 0); | |
7394 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 7395 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
7396 | #endif |
7397 | UNGCPRO; | |
7398 | } | |
7399 | ||
7400 | unbind_to (count, Qnil); | |
7401 | } | |
7402 | else | |
7403 | { | |
886bd6f2 GM |
7404 | struct frame *sf = SELECTED_FRAME (); |
7405 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 7406 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 7407 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
7408 | #endif |
7409 | } | |
7410 | ||
7411 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
7412 | pending_menu_activation is not defined. */ | |
7413 | #ifdef USE_X_TOOLKIT | |
7414 | pending_menu_activation = 0; | |
7415 | #endif | |
7416 | } | |
7417 | ||
7418 | ||
7419 | /* Update the menu bar item list for frame F. This has to be done | |
7420 | before we start to fill in any display lines, because it can call | |
7421 | eval. | |
7422 | ||
7423 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
7424 | ||
7425 | static void | |
7426 | update_menu_bar (f, save_match_data) | |
7427 | struct frame *f; | |
7428 | int save_match_data; | |
7429 | { | |
7430 | Lisp_Object window; | |
7431 | register struct window *w; | |
7432 | ||
e1477f43 GM |
7433 | /* If called recursively during a menu update, do nothing. This can |
7434 | happen when, for instance, an activate-menubar-hook causes a | |
7435 | redisplay. */ | |
7436 | if (inhibit_menubar_update) | |
7437 | return; | |
7438 | ||
5f5c8ee5 GM |
7439 | window = FRAME_SELECTED_WINDOW (f); |
7440 | w = XWINDOW (window); | |
7441 | ||
40ae145b | 7442 | #if 0 /* The if statement below this if statement used to include the |
a5f08374 RS |
7443 | condition !NILP (w->update_mode_line), rather than using |
7444 | update_mode_lines directly, and this if statement may have | |
7445 | been added to make that condition work. Now the if | |
7446 | statement below matches its comment, this isn't needed. */ | |
5f5c8ee5 GM |
7447 | if (update_mode_lines) |
7448 | w->update_mode_line = Qt; | |
a5f08374 | 7449 | #endif |
5f5c8ee5 GM |
7450 | |
7451 | if (FRAME_WINDOW_P (f) | |
7452 | ? | |
e0f712ba | 7453 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) |
5f5c8ee5 GM |
7454 | FRAME_EXTERNAL_MENU_BAR (f) |
7455 | #else | |
7456 | FRAME_MENU_BAR_LINES (f) > 0 | |
7457 | #endif | |
7458 | : FRAME_MENU_BAR_LINES (f) > 0) | |
7459 | { | |
7460 | /* If the user has switched buffers or windows, we need to | |
7461 | recompute to reflect the new bindings. But we'll | |
7462 | recompute when update_mode_lines is set too; that means | |
7463 | that people can use force-mode-line-update to request | |
7464 | that the menu bar be recomputed. The adverse effect on | |
7465 | the rest of the redisplay algorithm is about the same as | |
7466 | windows_or_buffers_changed anyway. */ | |
7467 | if (windows_or_buffers_changed | |
a5f08374 RS |
7468 | /* This used to test w->update_mode_line, but we believe |
7469 | there is no need to recompute the menu in that case. */ | |
7470 | || update_mode_lines | |
5f5c8ee5 GM |
7471 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) |
7472 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7473 | != !NILP (w->last_had_star)) | |
7474 | || ((!NILP (Vtransient_mark_mode) | |
7475 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7476 | != !NILP (w->region_showing))) | |
7477 | { | |
7478 | struct buffer *prev = current_buffer; | |
2d27dae2 | 7479 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 | 7480 | |
e1477f43 GM |
7481 | specbind (Qinhibit_menubar_update, Qt); |
7482 | ||
5f5c8ee5 GM |
7483 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7484 | if (save_match_data) | |
7485 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7486 | if (NILP (Voverriding_local_map_menu_flag)) | |
7487 | { | |
7488 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7489 | specbind (Qoverriding_local_map, Qnil); | |
7490 | } | |
7491 | ||
7492 | /* Run the Lucid hook. */ | |
65048e97 | 7493 | safe_run_hooks (Qactivate_menubar_hook); |
5f5c8ee5 GM |
7494 | |
7495 | /* If it has changed current-menubar from previous value, | |
7496 | really recompute the menu-bar from the value. */ | |
7497 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
7498 | call0 (Qrecompute_lucid_menubar); | |
7499 | ||
7500 | safe_run_hooks (Qmenu_bar_update_hook); | |
7501 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
7502 | ||
7503 | /* Redisplay the menu bar in case we changed it. */ | |
e0f712ba | 7504 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) |
1a578e9b | 7505 | if (FRAME_WINDOW_P (f) |
e0f712ba | 7506 | #if defined (MAC_OS) |
1a578e9b AC |
7507 | /* All frames on Mac OS share the same menubar. So only the |
7508 | selected frame should be allowed to set it. */ | |
7509 | && f == SELECTED_FRAME () | |
7510 | #endif | |
7511 | ) | |
5f5c8ee5 GM |
7512 | set_frame_menubar (f, 0, 0); |
7513 | else | |
7514 | /* On a terminal screen, the menu bar is an ordinary screen | |
7515 | line, and this makes it get updated. */ | |
7516 | w->update_mode_line = Qt; | |
7517 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
7518 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
7519 | line, and this makes it get updated. */ | |
7520 | w->update_mode_line = Qt; | |
7521 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
7522 | ||
7523 | unbind_to (count, Qnil); | |
7524 | set_buffer_internal_1 (prev); | |
7525 | } | |
7526 | } | |
7527 | } | |
7528 | ||
7529 | ||
7530 | \f | |
7531 | /*********************************************************************** | |
e037b9ec | 7532 | Tool-bars |
5f5c8ee5 GM |
7533 | ***********************************************************************/ |
7534 | ||
7535 | #ifdef HAVE_WINDOW_SYSTEM | |
7536 | ||
e037b9ec | 7537 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
7538 | before we start to fill in any display lines. Called from |
7539 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
7540 | and restore it here. */ | |
7541 | ||
7542 | static void | |
e037b9ec | 7543 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
7544 | struct frame *f; |
7545 | int save_match_data; | |
7546 | { | |
e037b9ec GM |
7547 | if (WINDOWP (f->tool_bar_window) |
7548 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
7549 | { |
7550 | Lisp_Object window; | |
7551 | struct window *w; | |
7552 | ||
7553 | window = FRAME_SELECTED_WINDOW (f); | |
7554 | w = XWINDOW (window); | |
7555 | ||
7556 | /* If the user has switched buffers or windows, we need to | |
7557 | recompute to reflect the new bindings. But we'll | |
7558 | recompute when update_mode_lines is set too; that means | |
7559 | that people can use force-mode-line-update to request | |
7560 | that the menu bar be recomputed. The adverse effect on | |
7561 | the rest of the redisplay algorithm is about the same as | |
7562 | windows_or_buffers_changed anyway. */ | |
7563 | if (windows_or_buffers_changed | |
7564 | || !NILP (w->update_mode_line) | |
7565 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7566 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7567 | != !NILP (w->last_had_star)) | |
7568 | || ((!NILP (Vtransient_mark_mode) | |
7569 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7570 | != !NILP (w->region_showing))) | |
7571 | { | |
7572 | struct buffer *prev = current_buffer; | |
2d27dae2 | 7573 | int count = BINDING_STACK_SIZE (); |
a2889657 | 7574 | |
5f5c8ee5 GM |
7575 | /* Set current_buffer to the buffer of the selected |
7576 | window of the frame, so that we get the right local | |
7577 | keymaps. */ | |
7578 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 7579 | |
5f5c8ee5 GM |
7580 | /* Save match data, if we must. */ |
7581 | if (save_match_data) | |
7582 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7583 | ||
7584 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
7585 | if (NILP (Voverriding_local_map_menu_flag)) | |
7586 | { | |
7587 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7588 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 7589 | } |
1f40cad2 | 7590 | |
e037b9ec | 7591 | /* Build desired tool-bar items from keymaps. */ |
7464726e GM |
7592 | f->tool_bar_items |
7593 | = tool_bar_items (f->tool_bar_items, &f->n_tool_bar_items); | |
5f5c8ee5 | 7594 | |
e037b9ec | 7595 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
7596 | w->update_mode_line = Qt; |
7597 | ||
7598 | unbind_to (count, Qnil); | |
7599 | set_buffer_internal_1 (prev); | |
81d478f3 | 7600 | } |
a2889657 JB |
7601 | } |
7602 | } | |
7603 | ||
6c4429a5 | 7604 | |
e037b9ec | 7605 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 7606 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
7607 | been set up previously by calling prepare_menu_bars. */ |
7608 | ||
a2889657 | 7609 | static void |
e037b9ec | 7610 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 7611 | struct frame *f; |
a2889657 | 7612 | { |
a23887b9 | 7613 | int i, size, size_needed; |
5f5c8ee5 GM |
7614 | struct gcpro gcpro1, gcpro2, gcpro3; |
7615 | Lisp_Object image, plist, props; | |
a2889657 | 7616 | |
5f5c8ee5 GM |
7617 | image = plist = props = Qnil; |
7618 | GCPRO3 (image, plist, props); | |
a2889657 | 7619 | |
e037b9ec | 7620 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
7621 | Otherwise, make a new string. */ |
7622 | ||
7623 | /* The size of the string we might be able to reuse. */ | |
e037b9ec | 7624 | size = (STRINGP (f->desired_tool_bar_string) |
2051c264 | 7625 | ? SCHARS (f->desired_tool_bar_string) |
5f5c8ee5 GM |
7626 | : 0); |
7627 | ||
b94c0d9c | 7628 | /* We need one space in the string for each image. */ |
a23887b9 | 7629 | size_needed = f->n_tool_bar_items; |
b94c0d9c GM |
7630 | |
7631 | /* Reuse f->desired_tool_bar_string, if possible. */ | |
cb2ddc53 | 7632 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
7633 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
7634 | make_number (' ')); | |
5f5c8ee5 GM |
7635 | else |
7636 | { | |
7637 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
7638 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 7639 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7640 | } |
a2889657 | 7641 | |
5f5c8ee5 | 7642 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
7643 | put a `menu_item' property on tool-bar items with a value that |
7644 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 7645 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 7646 | { |
7464726e | 7647 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 7648 | |
e037b9ec GM |
7649 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
7650 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 7651 | int hmargin, vmargin, relief, idx, end; |
ecd01a0e | 7652 | extern Lisp_Object QCrelief, QCmargin, QCconversion, Qimage; |
5f5c8ee5 GM |
7653 | |
7654 | /* If image is a vector, choose the image according to the | |
7655 | button state. */ | |
e037b9ec | 7656 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
7657 | if (VECTORP (image)) |
7658 | { | |
5f5c8ee5 GM |
7659 | if (enabled_p) |
7660 | idx = (selected_p | |
e037b9ec GM |
7661 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
7662 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
7663 | else |
7664 | idx = (selected_p | |
e037b9ec GM |
7665 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
7666 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 | 7667 | |
37e4e482 GM |
7668 | xassert (ASIZE (image) >= idx); |
7669 | image = AREF (image, idx); | |
5f5c8ee5 | 7670 | } |
37e4e482 GM |
7671 | else |
7672 | idx = -1; | |
5f5c8ee5 GM |
7673 | |
7674 | /* Ignore invalid image specifications. */ | |
7675 | if (!valid_image_p (image)) | |
7676 | continue; | |
7677 | ||
e037b9ec | 7678 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
7679 | plist = Fcopy_sequence (XCDR (image)); |
7680 | ||
7681 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 7682 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
7683 | ? tool_bar_button_relief |
7684 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
7685 | hmargin = vmargin = relief; |
7686 | ||
7687 | if (INTEGERP (Vtool_bar_button_margin) | |
7688 | && XINT (Vtool_bar_button_margin) > 0) | |
7689 | { | |
7690 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
7691 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
7692 | } | |
7693 | else if (CONSP (Vtool_bar_button_margin)) | |
7694 | { | |
7695 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
7696 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
7697 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
7698 | ||
7699 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) | |
7700 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
7701 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
7702 | } | |
5f5c8ee5 | 7703 | |
e037b9ec | 7704 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
7705 | { |
7706 | /* Add a `:relief' property to the image spec if the item is | |
7707 | selected. */ | |
7708 | if (selected_p) | |
7709 | { | |
7710 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
7711 | hmargin -= relief; |
7712 | vmargin -= relief; | |
5f5c8ee5 GM |
7713 | } |
7714 | } | |
7715 | else | |
7716 | { | |
7717 | /* If image is selected, display it pressed, i.e. with a | |
7718 | negative relief. If it's not selected, display it with a | |
7719 | raised relief. */ | |
7720 | plist = Fplist_put (plist, QCrelief, | |
7721 | (selected_p | |
7722 | ? make_number (-relief) | |
7723 | : make_number (relief))); | |
35a41507 GM |
7724 | hmargin -= relief; |
7725 | vmargin -= relief; | |
5f5c8ee5 GM |
7726 | } |
7727 | ||
7728 | /* Put a margin around the image. */ | |
35a41507 GM |
7729 | if (hmargin || vmargin) |
7730 | { | |
7731 | if (hmargin == vmargin) | |
7732 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
7733 | else | |
7734 | plist = Fplist_put (plist, QCmargin, | |
7735 | Fcons (make_number (hmargin), | |
7736 | make_number (vmargin))); | |
7737 | } | |
5f5c8ee5 | 7738 | |
37e4e482 GM |
7739 | /* If button is not enabled, and we don't have special images |
7740 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 7741 | applying an appropriate algorithm to it. */ |
37e4e482 | 7742 | if (!enabled_p && idx < 0) |
ecd01a0e | 7743 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
5f5c8ee5 GM |
7744 | |
7745 | /* Put a `display' text property on the string for the image to | |
7746 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 7747 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
7748 | vector. */ |
7749 | image = Fcons (Qimage, plist); | |
7750 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
7751 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
7752 | ||
7753 | /* Let the last image hide all remaining spaces in the tool bar | |
7754 | string. The string can be longer than needed when we reuse a | |
7755 | previous string. */ | |
7756 | if (i + 1 == f->n_tool_bar_items) | |
2051c264 | 7757 | end = SCHARS (f->desired_tool_bar_string); |
a23887b9 GM |
7758 | else |
7759 | end = i + 1; | |
7760 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 7761 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7762 | #undef PROP |
a2889657 JB |
7763 | } |
7764 | ||
5f5c8ee5 GM |
7765 | UNGCPRO; |
7766 | } | |
7767 | ||
7768 | ||
e037b9ec | 7769 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
7770 | |
7771 | static void | |
e037b9ec | 7772 | display_tool_bar_line (it) |
5f5c8ee5 GM |
7773 | struct it *it; |
7774 | { | |
7775 | struct glyph_row *row = it->glyph_row; | |
7776 | int max_x = it->last_visible_x; | |
7777 | struct glyph *last; | |
7778 | ||
7779 | prepare_desired_row (row); | |
7780 | row->y = it->current_y; | |
90aa2856 GM |
7781 | |
7782 | /* Note that this isn't made use of if the face hasn't a box, | |
7783 | so there's no need to check the face here. */ | |
7784 | it->start_of_box_run_p = 1; | |
5f5c8ee5 GM |
7785 | |
7786 | while (it->current_x < max_x) | |
a2889657 | 7787 | { |
5f5c8ee5 | 7788 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 7789 | |
5f5c8ee5 GM |
7790 | /* Get the next display element. */ |
7791 | if (!get_next_display_element (it)) | |
7792 | break; | |
73af359d | 7793 | |
5f5c8ee5 GM |
7794 | /* Produce glyphs. */ |
7795 | x_before = it->current_x; | |
7796 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
7797 | PRODUCE_GLYPHS (it); | |
daa37602 | 7798 | |
5f5c8ee5 GM |
7799 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
7800 | i = 0; | |
7801 | x = x_before; | |
7802 | while (i < nglyphs) | |
7803 | { | |
7804 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
7805 | ||
7806 | if (x + glyph->pixel_width > max_x) | |
7807 | { | |
7808 | /* Glyph doesn't fit on line. */ | |
7809 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
7810 | it->current_x = x; | |
7811 | goto out; | |
7812 | } | |
daa37602 | 7813 | |
5f5c8ee5 GM |
7814 | ++it->hpos; |
7815 | x += glyph->pixel_width; | |
7816 | ++i; | |
7817 | } | |
7818 | ||
7819 | /* Stop at line ends. */ | |
7820 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
7821 | break; | |
7822 | ||
cafafe0b | 7823 | set_iterator_to_next (it, 1); |
a2889657 | 7824 | } |
a2889657 | 7825 | |
5f5c8ee5 | 7826 | out:; |
a2889657 | 7827 | |
5f5c8ee5 GM |
7828 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
7829 | extend_face_to_end_of_line (it); | |
7830 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
7831 | last->right_box_line_p = 1; | |
90aa2856 GM |
7832 | if (last == row->glyphs[TEXT_AREA]) |
7833 | last->left_box_line_p = 1; | |
5f5c8ee5 GM |
7834 | compute_line_metrics (it); |
7835 | ||
e037b9ec | 7836 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
7837 | if (!row->displays_text_p) |
7838 | { | |
312246d1 GM |
7839 | row->height = row->phys_height = it->last_visible_y - row->y; |
7840 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
7841 | } |
7842 | ||
7843 | row->full_width_p = 1; | |
7844 | row->continued_p = 0; | |
7845 | row->truncated_on_left_p = 0; | |
7846 | row->truncated_on_right_p = 0; | |
7847 | ||
7848 | it->current_x = it->hpos = 0; | |
7849 | it->current_y += row->height; | |
7850 | ++it->vpos; | |
7851 | ++it->glyph_row; | |
a2889657 | 7852 | } |
96a410bc | 7853 | |
5f5c8ee5 | 7854 | |
e037b9ec | 7855 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 7856 | items of frame F visible. */ |
96a410bc | 7857 | |
d39b6696 | 7858 | static int |
e037b9ec | 7859 | tool_bar_lines_needed (f) |
5f5c8ee5 | 7860 | struct frame *f; |
d39b6696 | 7861 | { |
e037b9ec | 7862 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
7863 | struct it it; |
7864 | ||
e037b9ec GM |
7865 | /* Initialize an iterator for iteration over |
7866 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
7867 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7868 | it.first_visible_x = 0; |
7869 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 7870 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
7871 | |
7872 | while (!ITERATOR_AT_END_P (&it)) | |
7873 | { | |
7874 | it.glyph_row = w->desired_matrix->rows; | |
7875 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 7876 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
7877 | } |
7878 | ||
7879 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 7880 | } |
96a410bc | 7881 | |
5f5c8ee5 | 7882 | |
57c28064 GM |
7883 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
7884 | 0, 1, 0, | |
7ee72033 MB |
7885 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
7886 | (frame) | |
57c28064 GM |
7887 | Lisp_Object frame; |
7888 | { | |
7889 | struct frame *f; | |
7890 | struct window *w; | |
7891 | int nlines = 0; | |
7892 | ||
7893 | if (NILP (frame)) | |
7894 | frame = selected_frame; | |
7895 | else | |
b7826503 | 7896 | CHECK_FRAME (frame); |
57c28064 GM |
7897 | f = XFRAME (frame); |
7898 | ||
7899 | if (WINDOWP (f->tool_bar_window) | |
7900 | || (w = XWINDOW (f->tool_bar_window), | |
7901 | XFASTINT (w->height) > 0)) | |
7902 | { | |
7903 | update_tool_bar (f, 1); | |
7904 | if (f->n_tool_bar_items) | |
7905 | { | |
7906 | build_desired_tool_bar_string (f); | |
7907 | nlines = tool_bar_lines_needed (f); | |
7908 | } | |
7909 | } | |
7910 | ||
7911 | return make_number (nlines); | |
7912 | } | |
7913 | ||
7914 | ||
e037b9ec | 7915 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
7916 | height should be changed. */ |
7917 | ||
7918 | static int | |
e037b9ec | 7919 | redisplay_tool_bar (f) |
5f5c8ee5 | 7920 | struct frame *f; |
96a410bc | 7921 | { |
5f5c8ee5 GM |
7922 | struct window *w; |
7923 | struct it it; | |
7924 | struct glyph_row *row; | |
7925 | int change_height_p = 0; | |
7926 | ||
e037b9ec GM |
7927 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
7928 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 7929 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
7930 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
7931 | if (!WINDOWP (f->tool_bar_window) | |
7932 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
7933 | XFASTINT (w->height) == 0)) |
7934 | return 0; | |
96a410bc | 7935 | |
e037b9ec GM |
7936 | /* Set up an iterator for the tool-bar window. */ |
7937 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7938 | it.first_visible_x = 0; |
7939 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
7940 | row = it.glyph_row; | |
3450d04c | 7941 | |
e037b9ec GM |
7942 | /* Build a string that represents the contents of the tool-bar. */ |
7943 | build_desired_tool_bar_string (f); | |
7944 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 7945 | |
e037b9ec | 7946 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 7947 | while (it.current_y < it.last_visible_y) |
e037b9ec | 7948 | display_tool_bar_line (&it); |
3450d04c | 7949 | |
e037b9ec | 7950 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
7951 | window, so don't do it. */ |
7952 | w->desired_matrix->no_scrolling_p = 1; | |
7953 | w->must_be_updated_p = 1; | |
3450d04c | 7954 | |
e037b9ec | 7955 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
7956 | { |
7957 | int nlines; | |
6e33e6f0 GM |
7958 | |
7959 | /* If we couldn't display everything, change the tool-bar's | |
7960 | height. */ | |
7961 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
7962 | change_height_p = 1; | |
5f5c8ee5 GM |
7963 | |
7964 | /* If there are blank lines at the end, except for a partially | |
7965 | visible blank line at the end that is smaller than | |
e037b9ec | 7966 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
7967 | row = it.glyph_row - 1; |
7968 | if (!row->displays_text_p | |
7969 | && row->height >= CANON_Y_UNIT (f)) | |
7970 | change_height_p = 1; | |
7971 | ||
e037b9ec GM |
7972 | /* If row displays tool-bar items, but is partially visible, |
7973 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
7974 | if (row->displays_text_p |
7975 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
7976 | change_height_p = 1; | |
7977 | ||
e037b9ec | 7978 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
7979 | frame parameter. */ |
7980 | if (change_height_p | |
e037b9ec | 7981 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
7982 | nlines != XFASTINT (w->height))) |
7983 | { | |
e037b9ec | 7984 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 7985 | Lisp_Object frame; |
e85ee976 | 7986 | int old_height = XFASTINT (w->height); |
5f5c8ee5 GM |
7987 | |
7988 | XSETFRAME (frame, f); | |
7989 | clear_glyph_matrix (w->desired_matrix); | |
7990 | Fmodify_frame_parameters (frame, | |
e037b9ec | 7991 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
7992 | make_number (nlines)), |
7993 | Qnil)); | |
e85ee976 GM |
7994 | if (XFASTINT (w->height) != old_height) |
7995 | fonts_changed_p = 1; | |
5f5c8ee5 GM |
7996 | } |
7997 | } | |
3450d04c | 7998 | |
5f5c8ee5 | 7999 | return change_height_p; |
96a410bc | 8000 | } |
90adcf20 | 8001 | |
5f5c8ee5 | 8002 | |
e037b9ec GM |
8003 | /* Get information about the tool-bar item which is displayed in GLYPH |
8004 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 8005 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 8006 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 GM |
8007 | |
8008 | int | |
e037b9ec | 8009 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
8010 | struct frame *f; |
8011 | struct glyph *glyph; | |
8012 | int *prop_idx; | |
90adcf20 | 8013 | { |
5f5c8ee5 GM |
8014 | Lisp_Object prop; |
8015 | int success_p; | |
be676094 GM |
8016 | int charpos; |
8017 | ||
8018 | /* This function can be called asynchronously, which means we must | |
8019 | exclude any possibility that Fget_text_property signals an | |
8020 | error. */ | |
2051c264 | 8021 | charpos = min (SCHARS (f->current_tool_bar_string), glyph->charpos); |
be676094 | 8022 | charpos = max (0, charpos); |
5f5c8ee5 GM |
8023 | |
8024 | /* Get the text property `menu-item' at pos. The value of that | |
8025 | property is the start index of this item's properties in | |
7464726e | 8026 | F->tool_bar_items. */ |
be676094 | 8027 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 8028 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
8029 | if (INTEGERP (prop)) |
8030 | { | |
8031 | *prop_idx = XINT (prop); | |
8032 | success_p = 1; | |
8033 | } | |
8034 | else | |
8035 | success_p = 0; | |
90adcf20 | 8036 | |
5f5c8ee5 GM |
8037 | return success_p; |
8038 | } | |
8039 | ||
8040 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 8041 | |
feb0c42f | 8042 | |
5f5c8ee5 GM |
8043 | \f |
8044 | /************************************************************************ | |
8045 | Horizontal scrolling | |
8046 | ************************************************************************/ | |
feb0c42f | 8047 | |
5f5c8ee5 GM |
8048 | static int hscroll_window_tree P_ ((Lisp_Object)); |
8049 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 8050 | |
5f5c8ee5 GM |
8051 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
8052 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
8053 | that it is not within a certain margin at the window's left and | |
8054 | right border. Value is non-zero if any window's hscroll has been | |
8055 | changed. */ | |
8056 | ||
8057 | static int | |
8058 | hscroll_window_tree (window) | |
8059 | Lisp_Object window; | |
8060 | { | |
8061 | int hscrolled_p = 0; | |
e76d28d5 | 8062 | int hscroll_relative_p = FLOATP (Vhscroll_step); |
1df7e8f0 EZ |
8063 | int hscroll_step_abs = 0; |
8064 | double hscroll_step_rel = 0; | |
8065 | ||
8066 | if (hscroll_relative_p) | |
8067 | { | |
e76d28d5 | 8068 | hscroll_step_rel = XFLOAT_DATA (Vhscroll_step); |
1df7e8f0 EZ |
8069 | if (hscroll_step_rel < 0) |
8070 | { | |
8071 | hscroll_relative_p = 0; | |
8072 | hscroll_step_abs = 0; | |
8073 | } | |
8074 | } | |
e76d28d5 | 8075 | else if (INTEGERP (Vhscroll_step)) |
1df7e8f0 | 8076 | { |
e76d28d5 | 8077 | hscroll_step_abs = XINT (Vhscroll_step); |
1df7e8f0 EZ |
8078 | if (hscroll_step_abs < 0) |
8079 | hscroll_step_abs = 0; | |
8080 | } | |
8081 | else | |
8082 | hscroll_step_abs = 0; | |
8083 | ||
5f5c8ee5 | 8084 | while (WINDOWP (window)) |
90adcf20 | 8085 | { |
5f5c8ee5 | 8086 | struct window *w = XWINDOW (window); |
1df7e8f0 | 8087 | |
5f5c8ee5 GM |
8088 | if (WINDOWP (w->hchild)) |
8089 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
8090 | else if (WINDOWP (w->vchild)) | |
8091 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
8092 | else if (w->cursor.vpos >= 0) | |
8093 | { | |
e76d28d5 | 8094 | int h_margin, text_area_x, text_area_y; |
5f5c8ee5 | 8095 | int text_area_width, text_area_height; |
92a90e89 GM |
8096 | struct glyph_row *current_cursor_row |
8097 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
8098 | struct glyph_row *desired_cursor_row | |
8099 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
8100 | struct glyph_row *cursor_row | |
8101 | = (desired_cursor_row->enabled_p | |
8102 | ? desired_cursor_row | |
8103 | : current_cursor_row); | |
a2725ab2 | 8104 | |
5f5c8ee5 GM |
8105 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
8106 | &text_area_width, &text_area_height); | |
90adcf20 | 8107 | |
5f5c8ee5 | 8108 | /* Scroll when cursor is inside this scroll margin. */ |
e76d28d5 | 8109 | h_margin = hscroll_margin * CANON_X_UNIT (XFRAME (w->frame)); |
1df7e8f0 | 8110 | |
5f5c8ee5 | 8111 | if ((XFASTINT (w->hscroll) |
e76d28d5 | 8112 | && w->cursor.x <= h_margin) |
92a90e89 GM |
8113 | || (cursor_row->enabled_p |
8114 | && cursor_row->truncated_on_right_p | |
e76d28d5 | 8115 | && (w->cursor.x >= text_area_width - h_margin))) |
08b610e4 | 8116 | { |
5f5c8ee5 GM |
8117 | struct it it; |
8118 | int hscroll; | |
8119 | struct buffer *saved_current_buffer; | |
8120 | int pt; | |
1df7e8f0 | 8121 | int wanted_x; |
5f5c8ee5 GM |
8122 | |
8123 | /* Find point in a display of infinite width. */ | |
8124 | saved_current_buffer = current_buffer; | |
8125 | current_buffer = XBUFFER (w->buffer); | |
1df7e8f0 | 8126 | |
5f5c8ee5 GM |
8127 | if (w == XWINDOW (selected_window)) |
8128 | pt = BUF_PT (current_buffer); | |
8129 | else | |
08b610e4 | 8130 | { |
5f5c8ee5 GM |
8131 | pt = marker_position (w->pointm); |
8132 | pt = max (BEGV, pt); | |
8133 | pt = min (ZV, pt); | |
8134 | } | |
8135 | ||
8136 | /* Move iterator to pt starting at cursor_row->start in | |
8137 | a line with infinite width. */ | |
8138 | init_to_row_start (&it, w, cursor_row); | |
8139 | it.last_visible_x = INFINITY; | |
8140 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
8141 | current_buffer = saved_current_buffer; | |
8142 | ||
1df7e8f0 EZ |
8143 | /* Position cursor in window. */ |
8144 | if (!hscroll_relative_p && hscroll_step_abs == 0) | |
8145 | hscroll = max (0, it.current_x - text_area_width / 2) | |
8146 | / CANON_X_UNIT (it.f); | |
e76d28d5 | 8147 | else if (w->cursor.x >= text_area_width - h_margin) |
1df7e8f0 EZ |
8148 | { |
8149 | if (hscroll_relative_p) | |
8150 | wanted_x = text_area_width * (1 - hscroll_step_rel) | |
e76d28d5 | 8151 | - h_margin; |
1df7e8f0 EZ |
8152 | else |
8153 | wanted_x = text_area_width | |
8154 | - hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8155 | - h_margin; |
1df7e8f0 EZ |
8156 | hscroll |
8157 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8158 | } | |
8159 | else | |
8160 | { | |
8161 | if (hscroll_relative_p) | |
8162 | wanted_x = text_area_width * hscroll_step_rel | |
e76d28d5 | 8163 | + h_margin; |
1df7e8f0 EZ |
8164 | else |
8165 | wanted_x = hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8166 | + h_margin; |
1df7e8f0 EZ |
8167 | hscroll |
8168 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8169 | } | |
3172f70b | 8170 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
8171 | |
8172 | /* Don't call Fset_window_hscroll if value hasn't | |
8173 | changed because it will prevent redisplay | |
8174 | optimizations. */ | |
8175 | if (XFASTINT (w->hscroll) != hscroll) | |
8176 | { | |
3172f70b GM |
8177 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
8178 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 8179 | hscrolled_p = 1; |
08b610e4 | 8180 | } |
08b610e4 | 8181 | } |
08b610e4 | 8182 | } |
a2725ab2 | 8183 | |
5f5c8ee5 | 8184 | window = w->next; |
90adcf20 | 8185 | } |
cd6dfed6 | 8186 | |
5f5c8ee5 GM |
8187 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
8188 | return hscrolled_p; | |
8189 | } | |
8190 | ||
8191 | ||
8192 | /* Set hscroll so that cursor is visible and not inside horizontal | |
8193 | scroll margins for all windows in the tree rooted at WINDOW. See | |
8194 | also hscroll_window_tree above. Value is non-zero if any window's | |
8195 | hscroll has been changed. If it has, desired matrices on the frame | |
8196 | of WINDOW are cleared. */ | |
8197 | ||
8198 | static int | |
8199 | hscroll_windows (window) | |
8200 | Lisp_Object window; | |
8201 | { | |
d475bcb8 GM |
8202 | int hscrolled_p; |
8203 | ||
8204 | if (automatic_hscrolling_p) | |
8205 | { | |
8206 | hscrolled_p = hscroll_window_tree (window); | |
8207 | if (hscrolled_p) | |
8208 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
8209 | } | |
8210 | else | |
8211 | hscrolled_p = 0; | |
5f5c8ee5 | 8212 | return hscrolled_p; |
90adcf20 | 8213 | } |
5f5c8ee5 GM |
8214 | |
8215 | ||
90adcf20 | 8216 | \f |
5f5c8ee5 GM |
8217 | /************************************************************************ |
8218 | Redisplay | |
8219 | ************************************************************************/ | |
8220 | ||
8221 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
8222 | to a non-zero value. This is sometimes handy to have in a debugger | |
8223 | session. */ | |
8224 | ||
8225 | #if GLYPH_DEBUG | |
a2889657 | 8226 | |
5f5c8ee5 GM |
8227 | /* First and last unchanged row for try_window_id. */ |
8228 | ||
8229 | int debug_first_unchanged_at_end_vpos; | |
8230 | int debug_last_unchanged_at_beg_vpos; | |
8231 | ||
8232 | /* Delta vpos and y. */ | |
8233 | ||
8234 | int debug_dvpos, debug_dy; | |
8235 | ||
8236 | /* Delta in characters and bytes for try_window_id. */ | |
8237 | ||
8238 | int debug_delta, debug_delta_bytes; | |
8239 | ||
8240 | /* Values of window_end_pos and window_end_vpos at the end of | |
8241 | try_window_id. */ | |
8242 | ||
31ade731 | 8243 | EMACS_INT debug_end_pos, debug_end_vpos; |
5f5c8ee5 GM |
8244 | |
8245 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
8246 | format string. A1...A9 are a supplement for a variable-length | |
8247 | argument list. If trace_redisplay_p is non-zero also printf the | |
8248 | resulting string to stderr. */ | |
8249 | ||
8250 | static void | |
8251 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
8252 | struct window *w; | |
8253 | char *fmt; | |
8254 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
8255 | { | |
8256 | char buffer[512]; | |
8257 | char *method = w->desired_matrix->method; | |
8258 | int len = strlen (method); | |
8259 | int size = sizeof w->desired_matrix->method; | |
8260 | int remaining = size - len - 1; | |
8261 | ||
8262 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
8263 | if (len && remaining) | |
8264 | { | |
8265 | method[len] = '|'; | |
8266 | --remaining, ++len; | |
8267 | } | |
8268 | ||
8269 | strncpy (method + len, buffer, remaining); | |
8270 | ||
8271 | if (trace_redisplay_p) | |
8272 | fprintf (stderr, "%p (%s): %s\n", | |
8273 | w, | |
8274 | ((BUFFERP (w->buffer) | |
8275 | && STRINGP (XBUFFER (w->buffer)->name)) | |
2051c264 | 8276 | ? (char *) SDATA (XBUFFER (w->buffer)->name) |
5f5c8ee5 GM |
8277 | : "no buffer"), |
8278 | buffer); | |
8279 | } | |
a2889657 | 8280 | |
5f5c8ee5 | 8281 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 8282 | |
a2889657 | 8283 | |
5f5c8ee5 GM |
8284 | /* This counter is used to clear the face cache every once in a while |
8285 | in redisplay_internal. It is incremented for each redisplay. | |
8286 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
8287 | cleared. */ | |
0d231165 | 8288 | |
bb336f8d | 8289 | #define CLEAR_FACE_CACHE_COUNT 500 |
463f6b91 RS |
8290 | static int clear_face_cache_count; |
8291 | ||
20de20dc | 8292 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
8293 | |
8294 | static struct frame *previous_terminal_frame; | |
8295 | ||
8296 | /* Non-zero while redisplay_internal is in progress. */ | |
8297 | ||
8298 | int redisplaying_p; | |
8299 | ||
8300 | ||
8301 | /* Value is non-zero if all changes in window W, which displays | |
8302 | current_buffer, are in the text between START and END. START is a | |
8303 | buffer position, END is given as a distance from Z. Used in | |
8304 | redisplay_internal for display optimization. */ | |
8305 | ||
8306 | static INLINE int | |
8307 | text_outside_line_unchanged_p (w, start, end) | |
8308 | struct window *w; | |
8309 | int start, end; | |
8310 | { | |
8311 | int unchanged_p = 1; | |
8312 | ||
8313 | /* If text or overlays have changed, see where. */ | |
8314 | if (XFASTINT (w->last_modified) < MODIFF | |
8315 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
8316 | { | |
8317 | /* Gap in the line? */ | |
8318 | if (GPT < start || Z - GPT < end) | |
8319 | unchanged_p = 0; | |
8320 | ||
8321 | /* Changes start in front of the line, or end after it? */ | |
8322 | if (unchanged_p | |
9142dd5b GM |
8323 | && (BEG_UNCHANGED < start - 1 |
8324 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
8325 | unchanged_p = 0; |
8326 | ||
8327 | /* If selective display, can't optimize if changes start at the | |
8328 | beginning of the line. */ | |
8329 | if (unchanged_p | |
8330 | && INTEGERP (current_buffer->selective_display) | |
8331 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 8332 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 8333 | unchanged_p = 0; |
47d57b22 GM |
8334 | |
8335 | /* If there are overlays at the start or end of the line, these | |
8336 | may have overlay strings with newlines in them. A change at | |
8337 | START, for instance, may actually concern the display of such | |
8338 | overlay strings as well, and they are displayed on different | |
8339 | lines. So, quickly rule out this case. (For the future, it | |
8340 | might be desirable to implement something more telling than | |
8341 | just BEG/END_UNCHANGED.) */ | |
8342 | if (unchanged_p) | |
8343 | { | |
8344 | if (BEG + BEG_UNCHANGED == start | |
8345 | && overlay_touches_p (start)) | |
8346 | unchanged_p = 0; | |
8347 | if (END_UNCHANGED == end | |
8348 | && overlay_touches_p (Z - end)) | |
8349 | unchanged_p = 0; | |
8350 | } | |
5f5c8ee5 GM |
8351 | } |
8352 | ||
8353 | return unchanged_p; | |
8354 | } | |
8355 | ||
8356 | ||
8357 | /* Do a frame update, taking possible shortcuts into account. This is | |
8358 | the main external entry point for redisplay. | |
8359 | ||
8360 | If the last redisplay displayed an echo area message and that message | |
8361 | is no longer requested, we clear the echo area or bring back the | |
8362 | mini-buffer if that is in use. */ | |
20de20dc | 8363 | |
a2889657 JB |
8364 | void |
8365 | redisplay () | |
e9874cee RS |
8366 | { |
8367 | redisplay_internal (0); | |
8368 | } | |
8369 | ||
47d57b22 | 8370 | |
260a86a0 KH |
8371 | /* Return 1 if point moved out of or into a composition. Otherwise |
8372 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
8373 | position. BUF and PT are the current point buffer and position. */ | |
8374 | ||
8375 | int | |
8376 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
8377 | struct buffer *prev_buf, *buf; | |
8378 | int prev_pt, pt; | |
8379 | { | |
8380 | int start, end; | |
8381 | Lisp_Object prop; | |
8382 | Lisp_Object buffer; | |
8383 | ||
8384 | XSETBUFFER (buffer, buf); | |
8385 | /* Check a composition at the last point if point moved within the | |
8386 | same buffer. */ | |
8387 | if (prev_buf == buf) | |
8388 | { | |
8389 | if (prev_pt == pt) | |
8390 | /* Point didn't move. */ | |
8391 | return 0; | |
8392 | ||
8393 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) | |
8394 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
8395 | && COMPOSITION_VALID_P (start, end, prop) | |
8396 | && start < prev_pt && end > prev_pt) | |
8397 | /* The last point was within the composition. Return 1 iff | |
8398 | point moved out of the composition. */ | |
8399 | return (pt <= start || pt >= end); | |
8400 | } | |
8401 | ||
8402 | /* Check a composition at the current point. */ | |
8403 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
8404 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
8405 | && COMPOSITION_VALID_P (start, end, prop) | |
8406 | && start < pt && end > pt); | |
8407 | } | |
5f5c8ee5 | 8408 | |
47d57b22 | 8409 | |
9142dd5b GM |
8410 | /* Reconsider the setting of B->clip_changed which is displayed |
8411 | in window W. */ | |
8412 | ||
8413 | static INLINE void | |
8414 | reconsider_clip_changes (w, b) | |
8415 | struct window *w; | |
8416 | struct buffer *b; | |
8417 | { | |
8418 | if (b->prevent_redisplay_optimizations_p) | |
8419 | b->clip_changed = 1; | |
8420 | else if (b->clip_changed | |
8421 | && !NILP (w->window_end_valid) | |
8422 | && w->current_matrix->buffer == b | |
8423 | && w->current_matrix->zv == BUF_ZV (b) | |
8424 | && w->current_matrix->begv == BUF_BEGV (b)) | |
8425 | b->clip_changed = 0; | |
260a86a0 KH |
8426 | |
8427 | /* If display wasn't paused, and W is not a tool bar window, see if | |
8428 | point has been moved into or out of a composition. In that case, | |
8429 | we set b->clip_changed to 1 to force updating the screen. If | |
8430 | b->clip_changed has already been set to 1, we can skip this | |
8431 | check. */ | |
8432 | if (!b->clip_changed | |
8433 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
8434 | { | |
8435 | int pt; | |
8436 | ||
8437 | if (w == XWINDOW (selected_window)) | |
8438 | pt = BUF_PT (current_buffer); | |
8439 | else | |
8440 | pt = marker_position (w->pointm); | |
8441 | ||
8442 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 8443 | || pt != XINT (w->last_point)) |
260a86a0 | 8444 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 8445 | XINT (w->last_point), |
260a86a0 KH |
8446 | XBUFFER (w->buffer), pt)) |
8447 | b->clip_changed = 1; | |
8448 | } | |
9142dd5b GM |
8449 | } |
8450 | ||
8451 | ||
5f5c8ee5 GM |
8452 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
8453 | response to any user action; therefore, we should preserve the echo | |
8454 | area. (Actually, our caller does that job.) Perhaps in the future | |
8455 | avoid recentering windows if it is not necessary; currently that | |
8456 | causes some problems. */ | |
e9874cee RS |
8457 | |
8458 | static void | |
8459 | redisplay_internal (preserve_echo_area) | |
8460 | int preserve_echo_area; | |
a2889657 | 8461 | { |
5f5c8ee5 GM |
8462 | struct window *w = XWINDOW (selected_window); |
8463 | struct frame *f = XFRAME (w->frame); | |
8464 | int pause; | |
a2889657 | 8465 | int must_finish = 0; |
5f5c8ee5 | 8466 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 8467 | int number_of_visible_frames; |
28514cd9 | 8468 | int count; |
886bd6f2 | 8469 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 8470 | |
5f5c8ee5 GM |
8471 | /* Non-zero means redisplay has to consider all windows on all |
8472 | frames. Zero means, only selected_window is considered. */ | |
8473 | int consider_all_windows_p; | |
8474 | ||
8475 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
8476 | ||
8477 | /* No redisplay if running in batch mode or frame is not yet fully | |
8478 | initialized, or redisplay is explicitly turned off by setting | |
8479 | Vinhibit_redisplay. */ | |
8480 | if (noninteractive | |
8481 | || !NILP (Vinhibit_redisplay) | |
8482 | || !f->glyphs_initialized_p) | |
a2889657 JB |
8483 | return; |
8484 | ||
5f5c8ee5 GM |
8485 | /* The flag redisplay_performed_directly_p is set by |
8486 | direct_output_for_insert when it already did the whole screen | |
8487 | update necessary. */ | |
8488 | if (redisplay_performed_directly_p) | |
8489 | { | |
8490 | redisplay_performed_directly_p = 0; | |
8491 | if (!hscroll_windows (selected_window)) | |
8492 | return; | |
8493 | } | |
8494 | ||
15f0cf78 RS |
8495 | #ifdef USE_X_TOOLKIT |
8496 | if (popup_activated ()) | |
8497 | return; | |
8498 | #endif | |
8499 | ||
28514cd9 | 8500 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 8501 | if (redisplaying_p) |
735c094c KH |
8502 | return; |
8503 | ||
28514cd9 GM |
8504 | /* Record a function that resets redisplaying_p to its old value |
8505 | when we leave this function. */ | |
2d27dae2 | 8506 | count = BINDING_STACK_SIZE (); |
28514cd9 GM |
8507 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); |
8508 | ++redisplaying_p; | |
8509 | ||
8b32d885 | 8510 | retry: |
bd9d0f3f | 8511 | pause = 0; |
9142dd5b GM |
8512 | reconsider_clip_changes (w, current_buffer); |
8513 | ||
5f5c8ee5 GM |
8514 | /* If new fonts have been loaded that make a glyph matrix adjustment |
8515 | necessary, do it. */ | |
8516 | if (fonts_changed_p) | |
8517 | { | |
8518 | adjust_glyphs (NULL); | |
8519 | ++windows_or_buffers_changed; | |
8520 | fonts_changed_p = 0; | |
8521 | } | |
8522 | ||
6961e0c1 GM |
8523 | /* If face_change_count is non-zero, init_iterator will free all |
8524 | realized faces, which includes the faces referenced from current | |
8525 | matrices. So, we can't reuse current matrices in this case. */ | |
8526 | if (face_change_count) | |
8527 | ++windows_or_buffers_changed; | |
8528 | ||
886bd6f2 GM |
8529 | if (! FRAME_WINDOW_P (sf) |
8530 | && previous_terminal_frame != sf) | |
20de20dc | 8531 | { |
5f5c8ee5 GM |
8532 | /* Since frames on an ASCII terminal share the same display |
8533 | area, displaying a different frame means redisplay the whole | |
8534 | thing. */ | |
20de20dc | 8535 | windows_or_buffers_changed++; |
886bd6f2 GM |
8536 | SET_FRAME_GARBAGED (sf); |
8537 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 8538 | } |
886bd6f2 | 8539 | previous_terminal_frame = sf; |
20de20dc | 8540 | |
5f5c8ee5 GM |
8541 | /* Set the visible flags for all frames. Do this before checking |
8542 | for resized or garbaged frames; they want to know if their frames | |
8543 | are visible. See the comment in frame.h for | |
8544 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 8545 | { |
35f56f96 | 8546 | Lisp_Object tail, frame; |
d724d989 | 8547 | |
89819bdd RS |
8548 | number_of_visible_frames = 0; |
8549 | ||
35f56f96 | 8550 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 8551 | { |
5f5c8ee5 GM |
8552 | struct frame *f = XFRAME (frame); |
8553 | ||
8554 | FRAME_SAMPLE_VISIBILITY (f); | |
8555 | if (FRAME_VISIBLE_P (f)) | |
8556 | ++number_of_visible_frames; | |
8557 | clear_desired_matrices (f); | |
f82aff7c | 8558 | } |
d724d989 JB |
8559 | } |
8560 | ||
44fa5b1e | 8561 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 8562 | do_pending_window_change (1); |
a2889657 | 8563 | |
5f5c8ee5 | 8564 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 8565 | if (frame_garbaged) |
c6e89d6c | 8566 | clear_garbaged_frames (); |
a2889657 | 8567 | |
e037b9ec | 8568 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
8569 | prepare_menu_bars (); |
8570 | ||
28995e67 | 8571 | if (windows_or_buffers_changed) |
a2889657 JB |
8572 | update_mode_lines++; |
8573 | ||
538f13d4 RS |
8574 | /* Detect case that we need to write or remove a star in the mode line. */ |
8575 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
8576 | { |
8577 | w->update_mode_line = Qt; | |
8578 | if (buffer_shared > 1) | |
8579 | update_mode_lines++; | |
8580 | } | |
8581 | ||
5f5c8ee5 | 8582 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
8583 | if (!NILP (w->column_number_displayed) |
8584 | /* This alternative quickly identifies a common case | |
8585 | where no change is needed. */ | |
8586 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8587 | && XFASTINT (w->last_modified) >= MODIFF |
8588 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8589 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8590 | w->update_mode_line = Qt; | |
8591 | ||
44fa5b1e | 8592 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 8593 | |
5f5c8ee5 GM |
8594 | /* The variable buffer_shared is set in redisplay_window and |
8595 | indicates that we redisplay a buffer in different windows. See | |
8596 | there. */ | |
5fb96e96 RS |
8597 | consider_all_windows_p = (update_mode_lines || buffer_shared > 1 |
8598 | || cursor_type_changed); | |
a2889657 JB |
8599 | |
8600 | /* If specs for an arrow have changed, do thorough redisplay | |
8601 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 8602 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 8603 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 8604 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 8605 | |
90adcf20 RS |
8606 | /* Normally the message* functions will have already displayed and |
8607 | updated the echo area, but the frame may have been trashed, or | |
8608 | the update may have been preempted, so display the echo area | |
6e019995 | 8609 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 8610 | the echo area should be cleared. */ |
96d5e9a0 GM |
8611 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
8612 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
8613 | || (message_cleared_p |
8614 | && minibuf_level == 0 | |
8615 | /* If the mini-window is currently selected, this means the | |
8616 | echo-area doesn't show through. */ | |
8617 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 8618 | { |
c6e89d6c | 8619 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 8620 | must_finish = 1; |
6e019995 GM |
8621 | |
8622 | /* If we don't display the current message, don't clear the | |
8623 | message_cleared_p flag, because, if we did, we wouldn't clear | |
8624 | the echo area in the next redisplay which doesn't preserve | |
8625 | the echo area. */ | |
8626 | if (!display_last_displayed_message_p) | |
8627 | message_cleared_p = 0; | |
dd2eb166 | 8628 | |
c6e89d6c GM |
8629 | if (fonts_changed_p) |
8630 | goto retry; | |
8631 | else if (window_height_changed_p) | |
8632 | { | |
8633 | consider_all_windows_p = 1; | |
8634 | ++update_mode_lines; | |
8635 | ++windows_or_buffers_changed; | |
9142dd5b GM |
8636 | |
8637 | /* If window configuration was changed, frames may have been | |
8638 | marked garbaged. Clear them or we will experience | |
8639 | surprises wrt scrolling. */ | |
8640 | if (frame_garbaged) | |
8641 | clear_garbaged_frames (); | |
c6e89d6c | 8642 | } |
90adcf20 | 8643 | } |
97a36635 | 8644 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
8645 | && (current_buffer->clip_changed |
8646 | || XFASTINT (w->last_modified) < MODIFF | |
8647 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 8648 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
8649 | { |
8650 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
8651 | showing if its contents might have changed. */ |
8652 | must_finish = 1; | |
8653 | consider_all_windows_p = 1; | |
c6e89d6c | 8654 | ++windows_or_buffers_changed; |
dd2eb166 | 8655 | ++update_mode_lines; |
9142dd5b GM |
8656 | |
8657 | /* If window configuration was changed, frames may have been | |
8658 | marked garbaged. Clear them or we will experience | |
8659 | surprises wrt scrolling. */ | |
8660 | if (frame_garbaged) | |
8661 | clear_garbaged_frames (); | |
c6e89d6c GM |
8662 | } |
8663 | ||
90adcf20 | 8664 | |
5f5c8ee5 GM |
8665 | /* If showing the region, and mark has changed, we must redisplay |
8666 | the whole window. The assignment to this_line_start_pos prevents | |
8667 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
8668 | if (((!NILP (Vtransient_mark_mode) |
8669 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
8670 | != !NILP (w->region_showing)) | |
82d04750 JB |
8671 | || (!NILP (w->region_showing) |
8672 | && !EQ (w->region_showing, | |
8673 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
8674 | CHARPOS (this_line_start_pos) = 0; |
8675 | ||
8676 | /* Optimize the case that only the line containing the cursor in the | |
8677 | selected window has changed. Variables starting with this_ are | |
8678 | set in display_line and record information about the line | |
8679 | containing the cursor. */ | |
8680 | tlbufpos = this_line_start_pos; | |
8681 | tlendpos = this_line_end_pos; | |
8682 | if (!consider_all_windows_p | |
8683 | && CHARPOS (tlbufpos) > 0 | |
8684 | && NILP (w->update_mode_line) | |
73af359d | 8685 | && !current_buffer->clip_changed |
44fa5b1e | 8686 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 8687 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 8688 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
8689 | && this_line_buffer == current_buffer |
8690 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 8691 | && NILP (w->force_start) |
5f5c8ee5 GM |
8692 | /* Point must be on the line that we have info recorded about. */ |
8693 | && PT >= CHARPOS (tlbufpos) | |
8694 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
8695 | /* All text outside that line, including its final newline, |
8696 | must be unchanged */ | |
5f5c8ee5 GM |
8697 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
8698 | CHARPOS (tlendpos))) | |
8699 | { | |
8700 | if (CHARPOS (tlbufpos) > BEGV | |
8701 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
8702 | && (CHARPOS (tlbufpos) == ZV | |
8703 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
8704 | /* Former continuation line has disappeared by becoming empty */ |
8705 | goto cancel; | |
8706 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 8707 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
8708 | || MINI_WINDOW_P (w)) |
8709 | { | |
1c9241f5 KH |
8710 | /* We have to handle the case of continuation around a |
8711 | wide-column character (See the comment in indent.c around | |
8712 | line 885). | |
8713 | ||
8714 | For instance, in the following case: | |
8715 | ||
8716 | -------- Insert -------- | |
8717 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
8718 | J_I_ ==> J_I_ `^^' are cursors. | |
8719 | ^^ ^^ | |
8720 | -------- -------- | |
8721 | ||
8722 | As we have to redraw the line above, we should goto cancel. */ | |
8723 | ||
5f5c8ee5 GM |
8724 | struct it it; |
8725 | int line_height_before = this_line_pixel_height; | |
8726 | ||
8727 | /* Note that start_display will handle the case that the | |
8728 | line starting at tlbufpos is a continuation lines. */ | |
8729 | start_display (&it, w, tlbufpos); | |
8730 | ||
8731 | /* Implementation note: It this still necessary? */ | |
8732 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
8733 | goto cancel; |
8734 | ||
5f5c8ee5 GM |
8735 | TRACE ((stderr, "trying display optimization 1\n")); |
8736 | w->cursor.vpos = -1; | |
a2889657 | 8737 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
8738 | it.vpos = this_line_vpos; |
8739 | it.current_y = this_line_y; | |
8740 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
8741 | display_line (&it); | |
8742 | ||
a2889657 | 8743 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
8744 | and ends at same distance from eob as before, we win */ |
8745 | if (w->cursor.vpos >= 0 | |
8746 | /* Line is not continued, otherwise this_line_start_pos | |
8747 | would have been set to 0 in display_line. */ | |
8748 | && CHARPOS (this_line_start_pos) | |
8749 | /* Line ends as before. */ | |
8750 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
8751 | /* Line has same height as before. Otherwise other lines | |
8752 | would have to be shifted up or down. */ | |
8753 | && this_line_pixel_height == line_height_before) | |
a2889657 | 8754 | { |
5f5c8ee5 GM |
8755 | /* If this is not the window's last line, we must adjust |
8756 | the charstarts of the lines below. */ | |
8757 | if (it.current_y < it.last_visible_y) | |
8758 | { | |
8759 | struct glyph_row *row | |
8760 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
8761 | int delta, delta_bytes; | |
8762 | ||
8763 | if (Z - CHARPOS (tlendpos) == ZV) | |
8764 | { | |
8765 | /* This line ends at end of (accessible part of) | |
8766 | buffer. There is no newline to count. */ | |
8767 | delta = (Z | |
8768 | - CHARPOS (tlendpos) | |
8769 | - MATRIX_ROW_START_CHARPOS (row)); | |
8770 | delta_bytes = (Z_BYTE | |
8771 | - BYTEPOS (tlendpos) | |
8772 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8773 | } | |
8774 | else | |
8775 | { | |
8776 | /* This line ends in a newline. Must take | |
8777 | account of the newline and the rest of the | |
8778 | text that follows. */ | |
8779 | delta = (Z | |
8780 | - CHARPOS (tlendpos) | |
8781 | - MATRIX_ROW_START_CHARPOS (row)); | |
8782 | delta_bytes = (Z_BYTE | |
8783 | - BYTEPOS (tlendpos) | |
8784 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8785 | } | |
8786 | ||
f2d86d7a GM |
8787 | increment_matrix_positions (w->current_matrix, |
8788 | this_line_vpos + 1, | |
8789 | w->current_matrix->nrows, | |
8790 | delta, delta_bytes); | |
85bcef6c | 8791 | } |
46db8486 | 8792 | |
5f5c8ee5 GM |
8793 | /* If this row displays text now but previously didn't, |
8794 | or vice versa, w->window_end_vpos may have to be | |
8795 | adjusted. */ | |
8796 | if ((it.glyph_row - 1)->displays_text_p) | |
8797 | { | |
8798 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
8799 | XSETINT (w->window_end_vpos, this_line_vpos); | |
8800 | } | |
8801 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
8802 | && this_line_vpos > 0) | |
8803 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
8804 | w->window_end_valid = Qnil; | |
8805 | ||
8806 | /* Update hint: No need to try to scroll in update_window. */ | |
8807 | w->desired_matrix->no_scrolling_p = 1; | |
8808 | ||
8809 | #if GLYPH_DEBUG | |
8810 | *w->desired_matrix->method = 0; | |
8811 | debug_method_add (w, "optimization 1"); | |
8812 | #endif | |
a2889657 JB |
8813 | goto update; |
8814 | } | |
8815 | else | |
8816 | goto cancel; | |
8817 | } | |
5f5c8ee5 GM |
8818 | else if (/* Cursor position hasn't changed. */ |
8819 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
8820 | /* Make sure the cursor was last displayed |
8821 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
8822 | && 0 <= w->cursor.vpos |
8823 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
8824 | { |
8825 | if (!must_finish) | |
8826 | { | |
c6e89d6c | 8827 | do_pending_window_change (1); |
5f5c8ee5 GM |
8828 | |
8829 | /* We used to always goto end_of_redisplay here, but this | |
8830 | isn't enough if we have a blinking cursor. */ | |
8831 | if (w->cursor_off_p == w->last_cursor_off_p) | |
8832 | goto end_of_redisplay; | |
a2889657 JB |
8833 | } |
8834 | goto update; | |
8835 | } | |
8b51f1e3 KH |
8836 | /* If highlighting the region, or if the cursor is in the echo area, |
8837 | then we can't just move the cursor. */ | |
bd66d1ba RS |
8838 | else if (! (!NILP (Vtransient_mark_mode) |
8839 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 8840 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 8841 | || highlight_nonselected_windows) |
8b51f1e3 | 8842 | && NILP (w->region_showing) |
8f897821 | 8843 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 8844 | && !cursor_in_echo_area) |
a2889657 | 8845 | { |
5f5c8ee5 GM |
8846 | struct it it; |
8847 | struct glyph_row *row; | |
8848 | ||
8849 | /* Skip from tlbufpos to PT and see where it is. Note that | |
8850 | PT may be in invisible text. If so, we will end at the | |
8851 | next visible position. */ | |
8852 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
8853 | NULL, DEFAULT_FACE_ID); | |
8854 | it.current_x = this_line_start_x; | |
8855 | it.current_y = this_line_y; | |
8856 | it.vpos = this_line_vpos; | |
8857 | ||
8858 | /* The call to move_it_to stops in front of PT, but | |
8859 | moves over before-strings. */ | |
8860 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
8861 | ||
8862 | if (it.vpos == this_line_vpos | |
8863 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
8864 | row->enabled_p)) | |
a2889657 | 8865 | { |
5f5c8ee5 GM |
8866 | xassert (this_line_vpos == it.vpos); |
8867 | xassert (this_line_y == it.current_y); | |
8868 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
8869 | #if GLYPH_DEBUG |
8870 | *w->desired_matrix->method = 0; | |
8871 | debug_method_add (w, "optimization 3"); | |
8872 | #endif | |
a2889657 JB |
8873 | goto update; |
8874 | } | |
8875 | else | |
8876 | goto cancel; | |
8877 | } | |
5f5c8ee5 | 8878 | |
a2889657 | 8879 | cancel: |
5f5c8ee5 GM |
8880 | /* Text changed drastically or point moved off of line. */ |
8881 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
8882 | } |
8883 | ||
5f5c8ee5 GM |
8884 | CHARPOS (this_line_start_pos) = 0; |
8885 | consider_all_windows_p |= buffer_shared > 1; | |
8886 | ++clear_face_cache_count; | |
a2889657 | 8887 | |
5f5c8ee5 | 8888 | |
bd9d0f3f GM |
8889 | /* Build desired matrices, and update the display. If |
8890 | consider_all_windows_p is non-zero, do it for all windows on all | |
8891 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 8892 | |
5f5c8ee5 | 8893 | if (consider_all_windows_p) |
a2889657 | 8894 | { |
35f56f96 | 8895 | Lisp_Object tail, frame; |
0528abe1 GM |
8896 | int i, n = 0, size = 50; |
8897 | struct frame **updated | |
8898 | = (struct frame **) alloca (size * sizeof *updated); | |
a2889657 | 8899 | |
5f5c8ee5 GM |
8900 | /* Clear the face cache eventually. */ |
8901 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 8902 | { |
5f5c8ee5 | 8903 | clear_face_cache (0); |
463f6b91 RS |
8904 | clear_face_cache_count = 0; |
8905 | } | |
31b24551 | 8906 | |
5f5c8ee5 GM |
8907 | /* Recompute # windows showing selected buffer. This will be |
8908 | incremented each time such a window is displayed. */ | |
a2889657 JB |
8909 | buffer_shared = 0; |
8910 | ||
35f56f96 | 8911 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 8912 | { |
5f5c8ee5 | 8913 | struct frame *f = XFRAME (frame); |
bd9d0f3f | 8914 | |
886bd6f2 | 8915 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 8916 | { |
ae02e06a | 8917 | #ifdef HAVE_WINDOW_SYSTEM |
bb336f8d RS |
8918 | if (clear_face_cache_count % 50 == 0 |
8919 | && FRAME_WINDOW_P (f)) | |
8920 | clear_image_cache (f, 0); | |
ae02e06a | 8921 | #endif /* HAVE_WINDOW_SYSTEM */ |
bb336f8d | 8922 | |
5f5c8ee5 GM |
8923 | /* Mark all the scroll bars to be removed; we'll redeem |
8924 | the ones we want when we redisplay their windows. */ | |
9769686d | 8925 | if (condemn_scroll_bars_hook) |
504454e8 | 8926 | condemn_scroll_bars_hook (f); |
30c566e4 | 8927 | |
f21ef775 | 8928 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 8929 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 8930 | |
5f5c8ee5 GM |
8931 | /* Any scroll bars which redisplay_windows should have |
8932 | nuked should now go away. */ | |
9769686d | 8933 | if (judge_scroll_bars_hook) |
504454e8 | 8934 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
8935 | |
8936 | /* If fonts changed, display again. */ | |
8937 | if (fonts_changed_p) | |
8938 | goto retry; | |
8939 | ||
8940 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) | |
8941 | { | |
8942 | /* See if we have to hscroll. */ | |
8943 | if (hscroll_windows (f->root_window)) | |
8944 | goto retry; | |
8945 | ||
8946 | /* Prevent various kinds of signals during display | |
8947 | update. stdio is not robust about handling | |
8948 | signals, which can cause an apparent I/O | |
8949 | error. */ | |
8950 | if (interrupt_input) | |
8951 | unrequest_sigio (); | |
8952 | stop_polling (); | |
8953 | ||
8954 | /* Update the display. */ | |
8955 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
8956 | pause |= update_frame (f, 0, 0); | |
8957 | if (pause) | |
8958 | break; | |
8959 | ||
0528abe1 GM |
8960 | if (n == size) |
8961 | { | |
8962 | int nbytes = size * sizeof *updated; | |
8963 | struct frame **p = (struct frame **) alloca (2 * nbytes); | |
8964 | bcopy (updated, p, nbytes); | |
8965 | size *= 2; | |
8966 | } | |
8967 | ||
8968 | updated[n++] = f; | |
bd9d0f3f | 8969 | } |
9769686d | 8970 | } |
30c566e4 | 8971 | } |
0528abe1 GM |
8972 | |
8973 | /* Do the mark_window_display_accurate after all windows have | |
8974 | been redisplayed because this call resets flags in buffers | |
8975 | which are needed for proper redisplay. */ | |
8976 | for (i = 0; i < n; ++i) | |
8977 | { | |
8978 | struct frame *f = updated[i]; | |
8979 | mark_window_display_accurate (f->root_window, 1); | |
8980 | if (frame_up_to_date_hook) | |
8981 | frame_up_to_date_hook (f); | |
8982 | } | |
a2889657 | 8983 | } |
bd9d0f3f GM |
8984 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
8985 | { | |
8986 | Lisp_Object mini_window; | |
8987 | struct frame *mini_frame; | |
5f5c8ee5 | 8988 | |
82a7ab23 | 8989 | displayed_buffer = XBUFFER (XWINDOW (selected_window)->buffer); |
7033d6df RS |
8990 | /* Use list_of_error, not Qerror, so that |
8991 | we catch only errors and don't run the debugger. */ | |
8992 | internal_condition_case_1 (redisplay_window_1, selected_window, | |
8993 | list_of_error, | |
82a7ab23 | 8994 | redisplay_window_error); |
5f5c8ee5 | 8995 | |
bd9d0f3f GM |
8996 | /* Compare desired and current matrices, perform output. */ |
8997 | update: | |
5f5c8ee5 | 8998 | |
bd9d0f3f GM |
8999 | /* If fonts changed, display again. */ |
9000 | if (fonts_changed_p) | |
92a90e89 | 9001 | goto retry; |
a2889657 | 9002 | |
bd9d0f3f GM |
9003 | /* Prevent various kinds of signals during display update. |
9004 | stdio is not robust about handling signals, | |
9005 | which can cause an apparent I/O error. */ | |
9006 | if (interrupt_input) | |
9007 | unrequest_sigio (); | |
9008 | stop_polling (); | |
1af9f229 | 9009 | |
bd9d0f3f | 9010 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 9011 | { |
92a90e89 GM |
9012 | if (hscroll_windows (selected_window)) |
9013 | goto retry; | |
9014 | ||
5f5c8ee5 | 9015 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 9016 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 9017 | } |
d724d989 | 9018 | |
8de2d90b | 9019 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
9020 | function. If the echo area is on another frame, that may |
9021 | have put text on a frame other than the selected one, so the | |
9022 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 9023 | it here. */ |
bd9d0f3f GM |
9024 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
9025 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 9026 | |
bd9d0f3f GM |
9027 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
9028 | { | |
9029 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
9030 | pause |= update_frame (mini_frame, 0, 0); | |
9031 | if (!pause && hscroll_windows (mini_window)) | |
9032 | goto retry; | |
9033 | } | |
6e8290aa | 9034 | } |
a2889657 | 9035 | |
5f5c8ee5 GM |
9036 | /* If display was paused because of pending input, make sure we do a |
9037 | thorough update the next time. */ | |
a2889657 JB |
9038 | if (pause) |
9039 | { | |
5f5c8ee5 GM |
9040 | /* Prevent the optimization at the beginning of |
9041 | redisplay_internal that tries a single-line update of the | |
9042 | line containing the cursor in the selected window. */ | |
9043 | CHARPOS (this_line_start_pos) = 0; | |
9044 | ||
9045 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 9046 | if (!NILP (last_arrow_position)) |
a2889657 JB |
9047 | { |
9048 | last_arrow_position = Qt; | |
9049 | last_arrow_string = Qt; | |
9050 | } | |
5f5c8ee5 GM |
9051 | |
9052 | /* If we pause after scrolling, some rows in the current | |
9053 | matrices of some windows are not valid. */ | |
9054 | if (!WINDOW_FULL_WIDTH_P (w) | |
9055 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
9056 | update_mode_lines = 1; |
9057 | } | |
43c09969 | 9058 | else |
a2889657 | 9059 | { |
43c09969 | 9060 | if (!consider_all_windows_p) |
a2889657 | 9061 | { |
43c09969 GM |
9062 | /* This has already been done above if |
9063 | consider_all_windows_p is set. */ | |
9064 | mark_window_display_accurate_1 (w, 1); | |
927c5b3b GM |
9065 | |
9066 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); | |
9067 | last_arrow_string = Voverlay_arrow_string; | |
9068 | ||
efc63ef0 | 9069 | if (frame_up_to_date_hook != 0) |
43c09969 | 9070 | frame_up_to_date_hook (sf); |
a2889657 | 9071 | } |
15e26c76 | 9072 | |
a2889657 JB |
9073 | update_mode_lines = 0; |
9074 | windows_or_buffers_changed = 0; | |
5fb96e96 | 9075 | cursor_type_changed = 0; |
a2889657 JB |
9076 | } |
9077 | ||
5f5c8ee5 GM |
9078 | /* Start SIGIO interrupts coming again. Having them off during the |
9079 | code above makes it less likely one will discard output, but not | |
9080 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 9081 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
9082 | if (interrupt_input) |
9083 | request_sigio (); | |
9084 | start_polling (); | |
9085 | ||
5f5c8ee5 GM |
9086 | /* If a frame has become visible which was not before, redisplay |
9087 | again, so that we display it. Expose events for such a frame | |
9088 | (which it gets when becoming visible) don't call the parts of | |
9089 | redisplay constructing glyphs, so simply exposing a frame won't | |
9090 | display anything in this case. So, we have to display these | |
9091 | frames here explicitly. */ | |
11c52c4f RS |
9092 | if (!pause) |
9093 | { | |
9094 | Lisp_Object tail, frame; | |
9095 | int new_count = 0; | |
9096 | ||
9097 | FOR_EACH_FRAME (tail, frame) | |
9098 | { | |
9099 | int this_is_visible = 0; | |
8e83f802 RS |
9100 | |
9101 | if (XFRAME (frame)->visible) | |
9102 | this_is_visible = 1; | |
9103 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
9104 | if (XFRAME (frame)->visible) | |
9105 | this_is_visible = 1; | |
11c52c4f RS |
9106 | |
9107 | if (this_is_visible) | |
9108 | new_count++; | |
9109 | } | |
9110 | ||
89819bdd | 9111 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
9112 | windows_or_buffers_changed++; |
9113 | } | |
9114 | ||
44fa5b1e | 9115 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 9116 | do_pending_window_change (1); |
d8e242fd | 9117 | |
8b32d885 RS |
9118 | /* If we just did a pending size change, or have additional |
9119 | visible frames, redisplay again. */ | |
3c8c72e0 | 9120 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 9121 | goto retry; |
5f5c8ee5 GM |
9122 | |
9123 | end_of_redisplay:; | |
c6e89d6c | 9124 | |
28514cd9 | 9125 | unbind_to (count, Qnil); |
a2889657 JB |
9126 | } |
9127 | ||
5f5c8ee5 GM |
9128 | |
9129 | /* Redisplay, but leave alone any recent echo area message unless | |
9130 | another message has been requested in its place. | |
a2889657 JB |
9131 | |
9132 | This is useful in situations where you need to redisplay but no | |
9133 | user action has occurred, making it inappropriate for the message | |
9134 | area to be cleared. See tracking_off and | |
9bf76936 GM |
9135 | wait_reading_process_input for examples of these situations. |
9136 | ||
9137 | FROM_WHERE is an integer saying from where this function was | |
9138 | called. This is useful for debugging. */ | |
a2889657 | 9139 | |
8991bb31 | 9140 | void |
9bf76936 GM |
9141 | redisplay_preserve_echo_area (from_where) |
9142 | int from_where; | |
a2889657 | 9143 | { |
9bf76936 GM |
9144 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
9145 | ||
c6e89d6c | 9146 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 9147 | { |
c6e89d6c GM |
9148 | /* We have a previously displayed message, but no current |
9149 | message. Redisplay the previous message. */ | |
9150 | display_last_displayed_message_p = 1; | |
e9874cee | 9151 | redisplay_internal (1); |
c6e89d6c | 9152 | display_last_displayed_message_p = 0; |
a2889657 JB |
9153 | } |
9154 | else | |
e9874cee | 9155 | redisplay_internal (1); |
a2889657 JB |
9156 | } |
9157 | ||
5f5c8ee5 | 9158 | |
28514cd9 GM |
9159 | /* Function registered with record_unwind_protect in |
9160 | redisplay_internal. Clears the flag indicating that a redisplay is | |
9161 | in progress. */ | |
9162 | ||
9163 | static Lisp_Object | |
9164 | unwind_redisplay (old_redisplaying_p) | |
9165 | Lisp_Object old_redisplaying_p; | |
9166 | { | |
9167 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 9168 | return Qnil; |
28514cd9 GM |
9169 | } |
9170 | ||
9171 | ||
43c09969 GM |
9172 | /* Mark the display of window W as accurate or inaccurate. If |
9173 | ACCURATE_P is non-zero mark display of W as accurate. If | |
9174 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
9175 | redisplay_internal is called. */ | |
5f5c8ee5 | 9176 | |
43c09969 GM |
9177 | static void |
9178 | mark_window_display_accurate_1 (w, accurate_p) | |
9179 | struct window *w; | |
5f5c8ee5 | 9180 | int accurate_p; |
a2889657 | 9181 | { |
43c09969 | 9182 | if (BUFFERP (w->buffer)) |
a2889657 | 9183 | { |
43c09969 GM |
9184 | struct buffer *b = XBUFFER (w->buffer); |
9185 | ||
9186 | w->last_modified | |
9187 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
9188 | w->last_overlay_modified | |
9189 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
9190 | w->last_had_star | |
9191 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 9192 | |
43c09969 | 9193 | if (accurate_p) |
bd66d1ba | 9194 | { |
43c09969 GM |
9195 | b->clip_changed = 0; |
9196 | b->prevent_redisplay_optimizations_p = 0; | |
9197 | ||
9198 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
9199 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
9200 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
9201 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
5f5c8ee5 | 9202 | |
43c09969 GM |
9203 | w->current_matrix->buffer = b; |
9204 | w->current_matrix->begv = BUF_BEGV (b); | |
9205 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 | 9206 | |
43c09969 GM |
9207 | w->last_cursor = w->cursor; |
9208 | w->last_cursor_off_p = w->cursor_off_p; | |
9209 | ||
9210 | if (w == XWINDOW (selected_window)) | |
9211 | w->last_point = make_number (BUF_PT (b)); | |
9212 | else | |
9213 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 9214 | } |
43c09969 | 9215 | } |
bd66d1ba | 9216 | |
43c09969 GM |
9217 | if (accurate_p) |
9218 | { | |
d2f84654 | 9219 | w->window_end_valid = w->buffer; |
99332eb6 | 9220 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 GM |
9221 | xassert (XINT (w->window_end_vpos) |
9222 | < (XINT (w->height) | |
9223 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); | |
99332eb6 | 9224 | #endif |
a2889657 | 9225 | w->update_mode_line = Qnil; |
43c09969 GM |
9226 | } |
9227 | } | |
9228 | ||
9229 | ||
9230 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
9231 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
9232 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
9233 | be redisplayed the next time redisplay_internal is called. */ | |
9234 | ||
9235 | void | |
9236 | mark_window_display_accurate (window, accurate_p) | |
9237 | Lisp_Object window; | |
9238 | int accurate_p; | |
9239 | { | |
9240 | struct window *w; | |
9241 | ||
9242 | for (; !NILP (window); window = w->next) | |
9243 | { | |
9244 | w = XWINDOW (window); | |
9245 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 9246 | |
265a9e55 | 9247 | if (!NILP (w->vchild)) |
5f5c8ee5 | 9248 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 9249 | if (!NILP (w->hchild)) |
5f5c8ee5 | 9250 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
9251 | } |
9252 | ||
5f5c8ee5 | 9253 | if (accurate_p) |
a2889657 | 9254 | { |
d45de95b | 9255 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
9256 | last_arrow_string = Voverlay_arrow_string; |
9257 | } | |
9258 | else | |
9259 | { | |
5f5c8ee5 GM |
9260 | /* Force a thorough redisplay the next time by setting |
9261 | last_arrow_position and last_arrow_string to t, which is | |
4b41cebb | 9262 | unequal to any useful value of Voverlay_arrow_... */ |
a2889657 JB |
9263 | last_arrow_position = Qt; |
9264 | last_arrow_string = Qt; | |
9265 | } | |
9266 | } | |
5f5c8ee5 GM |
9267 | |
9268 | ||
9269 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
9270 | C. Since a display table doesn't have any parent, we don't have to | |
9271 | follow parent. Do not call this function directly but use the | |
9272 | macro DISP_CHAR_VECTOR. */ | |
9273 | ||
9274 | Lisp_Object | |
9275 | disp_char_vector (dp, c) | |
9276 | struct Lisp_Char_Table *dp; | |
9277 | int c; | |
9278 | { | |
9279 | int code[4], i; | |
9280 | Lisp_Object val; | |
9281 | ||
9282 | if (SINGLE_BYTE_CHAR_P (c)) | |
9283 | return (dp->contents[c]); | |
9284 | ||
c5924f47 | 9285 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
9286 | if (code[1] < 32) |
9287 | code[1] = -1; | |
9288 | else if (code[2] < 32) | |
9289 | code[2] = -1; | |
5f5c8ee5 GM |
9290 | |
9291 | /* Here, the possible range of code[0] (== charset ID) is | |
9292 | 128..max_charset. Since the top level char table contains data | |
9293 | for multibyte characters after 256th element, we must increment | |
9294 | code[0] by 128 to get a correct index. */ | |
9295 | code[0] += 128; | |
9296 | code[3] = -1; /* anchor */ | |
9297 | ||
9298 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
9299 | { | |
9300 | val = dp->contents[code[i]]; | |
9301 | if (!SUB_CHAR_TABLE_P (val)) | |
9302 | return (NILP (val) ? dp->defalt : val); | |
9303 | } | |
9304 | ||
9305 | /* Here, val is a sub char table. We return the default value of | |
9306 | it. */ | |
9307 | return (dp->defalt); | |
9308 | } | |
9309 | ||
9310 | ||
a2889657 | 9311 | \f |
5f5c8ee5 GM |
9312 | /*********************************************************************** |
9313 | Window Redisplay | |
9314 | ***********************************************************************/ | |
a2725ab2 | 9315 | |
5f5c8ee5 | 9316 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
9317 | |
9318 | static void | |
5f5c8ee5 GM |
9319 | redisplay_windows (window) |
9320 | Lisp_Object window; | |
90adcf20 | 9321 | { |
5f5c8ee5 GM |
9322 | while (!NILP (window)) |
9323 | { | |
9324 | struct window *w = XWINDOW (window); | |
9325 | ||
9326 | if (!NILP (w->hchild)) | |
9327 | redisplay_windows (w->hchild); | |
9328 | else if (!NILP (w->vchild)) | |
9329 | redisplay_windows (w->vchild); | |
9330 | else | |
82a7ab23 RS |
9331 | { |
9332 | displayed_buffer = XBUFFER (w->buffer); | |
7033d6df RS |
9333 | /* Use list_of_error, not Qerror, so that |
9334 | we catch only errors and don't run the debugger. */ | |
9335 | internal_condition_case_1 (redisplay_window_0, window, | |
9336 | list_of_error, | |
82a7ab23 RS |
9337 | redisplay_window_error); |
9338 | } | |
a2725ab2 | 9339 | |
5f5c8ee5 GM |
9340 | window = w->next; |
9341 | } | |
9342 | } | |
9343 | ||
82a7ab23 RS |
9344 | static Lisp_Object |
9345 | redisplay_window_error () | |
9346 | { | |
9347 | displayed_buffer->display_error_modiff = BUF_MODIFF (displayed_buffer); | |
9348 | return Qnil; | |
9349 | } | |
9350 | ||
9351 | static Lisp_Object | |
9352 | redisplay_window_0 (window) | |
9353 | Lisp_Object window; | |
9354 | { | |
9355 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9356 | redisplay_window (window, 0); | |
9357 | return Qnil; | |
9358 | } | |
5f5c8ee5 | 9359 | |
82a7ab23 RS |
9360 | static Lisp_Object |
9361 | redisplay_window_1 (window) | |
9362 | Lisp_Object window; | |
9363 | { | |
9364 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9365 | redisplay_window (window, 1); | |
9366 | return Qnil; | |
9367 | } | |
9368 | \f | |
5f5c8ee5 GM |
9369 | /* Set cursor position of W. PT is assumed to be displayed in ROW. |
9370 | DELTA is the number of bytes by which positions recorded in ROW | |
9371 | differ from current buffer positions. */ | |
9372 | ||
9373 | void | |
9374 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
9375 | struct window *w; | |
9376 | struct glyph_row *row; | |
9377 | struct glyph_matrix *matrix; | |
9378 | int delta, delta_bytes, dy, dvpos; | |
9379 | { | |
9380 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
9381 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
9382 | int x = row->x; | |
9383 | int pt_old = PT - delta; | |
9384 | ||
9385 | /* Skip over glyphs not having an object at the start of the row. | |
9386 | These are special glyphs like truncation marks on terminal | |
9387 | frames. */ | |
9388 | if (row->displays_text_p) | |
9389 | while (glyph < end | |
6fc556fd | 9390 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
9391 | && glyph->charpos < 0) |
9392 | { | |
9393 | x += glyph->pixel_width; | |
9394 | ++glyph; | |
9395 | } | |
9396 | ||
9397 | while (glyph < end | |
6fc556fd | 9398 | && !INTEGERP (glyph->object) |
5f5c8ee5 GM |
9399 | && (!BUFFERP (glyph->object) |
9400 | || glyph->charpos < pt_old)) | |
9401 | { | |
9402 | x += glyph->pixel_width; | |
9403 | ++glyph; | |
9404 | } | |
9405 | ||
9406 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
9407 | w->cursor.x = x; | |
9408 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
9409 | w->cursor.y = row->y + dy; | |
9410 | ||
9411 | if (w == XWINDOW (selected_window)) | |
9412 | { | |
9413 | if (!row->continued_p | |
9414 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
9415 | && row->x == 0) | |
9416 | { | |
9417 | this_line_buffer = XBUFFER (w->buffer); | |
9418 | ||
9419 | CHARPOS (this_line_start_pos) | |
9420 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9421 | BYTEPOS (this_line_start_pos) | |
9422 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
9423 | ||
9424 | CHARPOS (this_line_end_pos) | |
9425 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
9426 | BYTEPOS (this_line_end_pos) | |
9427 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
9428 | ||
9429 | this_line_y = w->cursor.y; | |
9430 | this_line_pixel_height = row->height; | |
9431 | this_line_vpos = w->cursor.vpos; | |
9432 | this_line_start_x = row->x; | |
9433 | } | |
9434 | else | |
9435 | CHARPOS (this_line_start_pos) = 0; | |
9436 | } | |
9437 | } | |
9438 | ||
9439 | ||
9440 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
9441 | start STARTP. Sets the window start of WINDOW to that position. |
9442 | ||
9443 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
9444 | |
9445 | static INLINE struct text_pos | |
9446 | run_window_scroll_functions (window, startp) | |
9447 | Lisp_Object window; | |
9448 | struct text_pos startp; | |
9449 | { | |
9450 | struct window *w = XWINDOW (window); | |
9451 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
9452 | |
9453 | if (current_buffer != XBUFFER (w->buffer)) | |
9454 | abort (); | |
9455 | ||
5f5c8ee5 GM |
9456 | if (!NILP (Vwindow_scroll_functions)) |
9457 | { | |
9458 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
9459 | make_number (CHARPOS (startp))); | |
9460 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
9461 | /* In case the hook functions switch buffers. */ |
9462 | if (current_buffer != XBUFFER (w->buffer)) | |
9463 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 9464 | } |
90adcf20 | 9465 | |
5f5c8ee5 GM |
9466 | return startp; |
9467 | } | |
9468 | ||
9469 | ||
9470 | /* Modify the desired matrix of window W and W->vscroll so that the | |
cb617e7c GM |
9471 | line containing the cursor is fully visible. If this requires |
9472 | larger matrices than are allocated, set fonts_changed_p and return | |
9473 | 0. */ | |
5f5c8ee5 | 9474 | |
cb617e7c | 9475 | static int |
5f5c8ee5 GM |
9476 | make_cursor_line_fully_visible (w) |
9477 | struct window *w; | |
9478 | { | |
9479 | struct glyph_matrix *matrix; | |
9480 | struct glyph_row *row; | |
478d746b | 9481 | int window_height; |
5f5c8ee5 GM |
9482 | |
9483 | /* It's not always possible to find the cursor, e.g, when a window | |
9484 | is full of overlay strings. Don't do anything in that case. */ | |
9485 | if (w->cursor.vpos < 0) | |
cb617e7c | 9486 | return 1; |
5f5c8ee5 GM |
9487 | |
9488 | matrix = w->desired_matrix; | |
9489 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
9490 | ||
b28cb6ed GM |
9491 | /* If the cursor row is not partially visible, there's nothing |
9492 | to do. */ | |
9493 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
cb617e7c | 9494 | return 1; |
b28cb6ed GM |
9495 | |
9496 | /* If the row the cursor is in is taller than the window's height, | |
9497 | it's not clear what to do, so do nothing. */ | |
9498 | window_height = window_box_height (w); | |
9499 | if (row->height >= window_height) | |
cb617e7c | 9500 | return 1; |
b28cb6ed GM |
9501 | |
9502 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
5f5c8ee5 GM |
9503 | { |
9504 | int dy = row->height - row->visible_height; | |
9505 | w->vscroll = 0; | |
9506 | w->cursor.y += dy; | |
9507 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9508 | } | |
b28cb6ed | 9509 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
9510 | { |
9511 | int dy = - (row->height - row->visible_height); | |
9512 | w->vscroll = dy; | |
9513 | w->cursor.y += dy; | |
9514 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9515 | } | |
b28cb6ed | 9516 | |
5f5c8ee5 GM |
9517 | /* When we change the cursor y-position of the selected window, |
9518 | change this_line_y as well so that the display optimization for | |
9519 | the cursor line of the selected window in redisplay_internal uses | |
9520 | the correct y-position. */ | |
9521 | if (w == XWINDOW (selected_window)) | |
9522 | this_line_y = w->cursor.y; | |
cb617e7c GM |
9523 | |
9524 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
9525 | redisplay with larger matrices. */ | |
9526 | if (matrix->nrows < required_matrix_height (w)) | |
9527 | { | |
9528 | fonts_changed_p = 1; | |
9529 | return 0; | |
9530 | } | |
9531 | ||
9532 | return 1; | |
5f5c8ee5 GM |
9533 | } |
9534 | ||
9535 | ||
9536 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
9537 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
9538 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
9539 | in redisplay_window to bring a partially visible line into view in | |
9540 | the case that only the cursor has moved. | |
9541 | ||
9542 | Value is | |
9543 | ||
9544 | 1 if scrolling succeeded | |
9545 | ||
9546 | 0 if scrolling didn't find point. | |
9547 | ||
9548 | -1 if new fonts have been loaded so that we must interrupt | |
9549 | redisplay, adjust glyph matrices, and try again. */ | |
9550 | ||
cb617e7c GM |
9551 | enum |
9552 | { | |
9553 | SCROLLING_SUCCESS, | |
9554 | SCROLLING_FAILED, | |
9555 | SCROLLING_NEED_LARGER_MATRICES | |
9556 | }; | |
9557 | ||
5f5c8ee5 GM |
9558 | static int |
9559 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
9560 | scroll_step, temp_scroll_step) | |
9561 | Lisp_Object window; | |
9562 | int just_this_one_p; | |
31ade731 | 9563 | EMACS_INT scroll_conservatively, scroll_step; |
5f5c8ee5 GM |
9564 | int temp_scroll_step; |
9565 | { | |
9566 | struct window *w = XWINDOW (window); | |
9567 | struct frame *f = XFRAME (w->frame); | |
9568 | struct text_pos scroll_margin_pos; | |
9569 | struct text_pos pos; | |
9570 | struct text_pos startp; | |
9571 | struct it it; | |
9572 | Lisp_Object window_end; | |
9573 | int this_scroll_margin; | |
9574 | int dy = 0; | |
9575 | int scroll_max; | |
b8a63ccb | 9576 | int rc; |
5f5c8ee5 GM |
9577 | int amount_to_scroll = 0; |
9578 | Lisp_Object aggressive; | |
9579 | int height; | |
9580 | ||
9581 | #if GLYPH_DEBUG | |
9582 | debug_method_add (w, "try_scrolling"); | |
78614721 | 9583 | #endif |
5f5c8ee5 GM |
9584 | |
9585 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
9586 | ||
9587 | /* Compute scroll margin height in pixels. We scroll when point is | |
9588 | within this distance from the top or bottom of the window. */ | |
9589 | if (scroll_margin > 0) | |
90adcf20 | 9590 | { |
5f5c8ee5 GM |
9591 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
9592 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9593 | } | |
9594 | else | |
9595 | this_scroll_margin = 0; | |
9596 | ||
9597 | /* Compute how much we should try to scroll maximally to bring point | |
9598 | into view. */ | |
0894e696 SM |
9599 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
9600 | scroll_max = max (scroll_step, | |
9601 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
9602 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
9603 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
9604 | /* We're trying to scroll because of aggressive scrolling | |
9605 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
9606 | there should be a variable for this. */ | |
9607 | scroll_max = 10; | |
9608 | else | |
9609 | scroll_max = 0; | |
9610 | scroll_max *= CANON_Y_UNIT (f); | |
9611 | ||
9612 | /* Decide whether we have to scroll down. Start at the window end | |
9613 | and move this_scroll_margin up to find the position of the scroll | |
9614 | margin. */ | |
9615 | window_end = Fwindow_end (window, Qt); | |
9616 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
9617 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
9618 | if (this_scroll_margin) | |
9619 | { | |
9620 | start_display (&it, w, scroll_margin_pos); | |
9621 | move_it_vertically (&it, - this_scroll_margin); | |
9622 | scroll_margin_pos = it.current.pos; | |
9623 | } | |
9624 | ||
9625 | if (PT >= CHARPOS (scroll_margin_pos)) | |
9626 | { | |
9627 | int y0; | |
9628 | ||
9629 | /* Point is in the scroll margin at the bottom of the window, or | |
9630 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 9631 | |
5f5c8ee5 GM |
9632 | /* Compute the distance from the scroll margin to PT. |
9633 | Give up if the distance is greater than scroll_max. */ | |
9634 | start_display (&it, w, scroll_margin_pos); | |
9635 | y0 = it.current_y; | |
9636 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
9637 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
539e92ad GM |
9638 | |
9639 | /* To make point visible, we have to move the window start | |
9640 | down so that the line the cursor is in is visible, which | |
9641 | means we have to add in the height of the cursor line. */ | |
9642 | dy = line_bottom_y (&it) - y0; | |
47589c8c | 9643 | |
5f5c8ee5 | 9644 | if (dy > scroll_max) |
cb617e7c | 9645 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9646 | |
9647 | /* Move the window start down. If scrolling conservatively, | |
9648 | move it just enough down to make point visible. If | |
9649 | scroll_step is set, move it down by scroll_step. */ | |
9650 | start_display (&it, w, startp); | |
9651 | ||
9652 | if (scroll_conservatively) | |
e89aaabd GM |
9653 | amount_to_scroll |
9654 | = max (max (dy, CANON_Y_UNIT (f)), | |
9655 | CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9656 | else if (scroll_step || temp_scroll_step) |
9657 | amount_to_scroll = scroll_max; | |
9658 | else | |
90adcf20 | 9659 | { |
46226c1d | 9660 | aggressive = current_buffer->scroll_up_aggressively; |
5f5c8ee5 | 9661 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 9662 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9663 | if (NUMBERP (aggressive)) |
9664 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9665 | } | |
a2725ab2 | 9666 | |
5f5c8ee5 | 9667 | if (amount_to_scroll <= 0) |
cb617e7c | 9668 | return SCROLLING_FAILED; |
a2725ab2 | 9669 | |
5f5c8ee5 GM |
9670 | move_it_vertically (&it, amount_to_scroll); |
9671 | startp = it.current.pos; | |
9672 | } | |
9673 | else | |
9674 | { | |
9675 | /* See if point is inside the scroll margin at the top of the | |
9676 | window. */ | |
9677 | scroll_margin_pos = startp; | |
9678 | if (this_scroll_margin) | |
9679 | { | |
9680 | start_display (&it, w, startp); | |
9681 | move_it_vertically (&it, this_scroll_margin); | |
9682 | scroll_margin_pos = it.current.pos; | |
9683 | } | |
9684 | ||
9685 | if (PT < CHARPOS (scroll_margin_pos)) | |
9686 | { | |
9687 | /* Point is in the scroll margin at the top of the window or | |
9688 | above what is displayed in the window. */ | |
9689 | int y0; | |
9690 | ||
9691 | /* Compute the vertical distance from PT to the scroll | |
9692 | margin position. Give up if distance is greater than | |
9693 | scroll_max. */ | |
9694 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
9695 | start_display (&it, w, pos); | |
9696 | y0 = it.current_y; | |
9697 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
9698 | it.last_visible_y, -1, | |
9699 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
9700 | dy = it.current_y - y0; | |
9701 | if (dy > scroll_max) | |
cb617e7c | 9702 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9703 | |
9704 | /* Compute new window start. */ | |
9705 | start_display (&it, w, startp); | |
9706 | ||
9707 | if (scroll_conservatively) | |
0894e696 SM |
9708 | amount_to_scroll = |
9709 | max (dy, CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9710 | else if (scroll_step || temp_scroll_step) |
9711 | amount_to_scroll = scroll_max; | |
538f13d4 | 9712 | else |
5f5c8ee5 | 9713 | { |
46226c1d | 9714 | aggressive = current_buffer->scroll_down_aggressively; |
5f5c8ee5 | 9715 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 9716 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9717 | if (NUMBERP (aggressive)) |
9718 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9719 | } | |
a2725ab2 | 9720 | |
5f5c8ee5 | 9721 | if (amount_to_scroll <= 0) |
cb617e7c | 9722 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9723 | |
9724 | move_it_vertically (&it, - amount_to_scroll); | |
9725 | startp = it.current.pos; | |
90adcf20 RS |
9726 | } |
9727 | } | |
a2889657 | 9728 | |
5f5c8ee5 GM |
9729 | /* Run window scroll functions. */ |
9730 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 9731 | |
5f5c8ee5 GM |
9732 | /* Display the window. Give up if new fonts are loaded, or if point |
9733 | doesn't appear. */ | |
9734 | if (!try_window (window, startp)) | |
cb617e7c | 9735 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
9736 | else if (w->cursor.vpos < 0) |
9737 | { | |
9738 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 9739 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
9740 | } |
9741 | else | |
9742 | { | |
9743 | /* Maybe forget recorded base line for line number display. */ | |
9744 | if (!just_this_one_p | |
9745 | || current_buffer->clip_changed | |
9142dd5b | 9746 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
9747 | w->base_line_number = Qnil; |
9748 | ||
9749 | /* If cursor ends up on a partially visible line, shift display | |
cb617e7c GM |
9750 | lines up or down. If that fails because we need larger |
9751 | matrices, give up. */ | |
9752 | if (!make_cursor_line_fully_visible (w)) | |
9753 | rc = SCROLLING_NEED_LARGER_MATRICES; | |
9754 | else | |
9755 | rc = SCROLLING_SUCCESS; | |
5f5c8ee5 GM |
9756 | } |
9757 | ||
9758 | return rc; | |
a2889657 JB |
9759 | } |
9760 | ||
5f5c8ee5 GM |
9761 | |
9762 | /* Compute a suitable window start for window W if display of W starts | |
9763 | on a continuation line. Value is non-zero if a new window start | |
9764 | was computed. | |
9765 | ||
9766 | The new window start will be computed, based on W's width, starting | |
9767 | from the start of the continued line. It is the start of the | |
9768 | screen line with the minimum distance from the old start W->start. */ | |
9769 | ||
9770 | static int | |
9771 | compute_window_start_on_continuation_line (w) | |
9772 | struct window *w; | |
1f1ff51d | 9773 | { |
5f5c8ee5 GM |
9774 | struct text_pos pos, start_pos; |
9775 | int window_start_changed_p = 0; | |
1f1ff51d | 9776 | |
5f5c8ee5 | 9777 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 9778 | |
5f5c8ee5 GM |
9779 | /* If window start is on a continuation line... Window start may be |
9780 | < BEGV in case there's invisible text at the start of the | |
9781 | buffer (M-x rmail, for example). */ | |
9782 | if (CHARPOS (start_pos) > BEGV | |
9783 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 9784 | { |
5f5c8ee5 GM |
9785 | struct it it; |
9786 | struct glyph_row *row; | |
f3751a65 GM |
9787 | |
9788 | /* Handle the case that the window start is out of range. */ | |
9789 | if (CHARPOS (start_pos) < BEGV) | |
9790 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
9791 | else if (CHARPOS (start_pos) > ZV) | |
9792 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
9793 | |
9794 | /* Find the start of the continued line. This should be fast | |
9795 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 9796 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
9797 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
9798 | row, DEFAULT_FACE_ID); | |
9799 | reseat_at_previous_visible_line_start (&it); | |
9800 | ||
9801 | /* If the line start is "too far" away from the window start, | |
9802 | say it takes too much time to compute a new window start. */ | |
9803 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
9804 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
9805 | { | |
9806 | int min_distance, distance; | |
9807 | ||
9808 | /* Move forward by display lines to find the new window | |
9809 | start. If window width was enlarged, the new start can | |
9810 | be expected to be > the old start. If window width was | |
9811 | decreased, the new window start will be < the old start. | |
9812 | So, we're looking for the display line start with the | |
9813 | minimum distance from the old window start. */ | |
9814 | pos = it.current.pos; | |
9815 | min_distance = INFINITY; | |
9816 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
9817 | distance < min_distance) | |
9818 | { | |
9819 | min_distance = distance; | |
9820 | pos = it.current.pos; | |
9821 | move_it_by_lines (&it, 1, 0); | |
9822 | } | |
9823 | ||
9824 | /* Set the window start there. */ | |
9825 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
9826 | window_start_changed_p = 1; | |
9827 | } | |
1f1ff51d | 9828 | } |
5f5c8ee5 GM |
9829 | |
9830 | return window_start_changed_p; | |
1f1ff51d KH |
9831 | } |
9832 | ||
5f5c8ee5 | 9833 | |
1dd5768b | 9834 | /* Try cursor movement in case text has not changed in window WINDOW, |
47589c8c GM |
9835 | with window start STARTP. Value is |
9836 | ||
cb617e7c | 9837 | CURSOR_MOVEMENT_SUCCESS if successful |
47589c8c | 9838 | |
cb617e7c GM |
9839 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
9840 | ||
9841 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
9842 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
9843 | we want to scroll as if scroll-step were set to 1. See the code. | |
9844 | ||
9845 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
9846 | which case we have to abort this redisplay, and adjust matrices | |
9847 | first. */ | |
9848 | ||
9849 | enum | |
9850 | { | |
9851 | CURSOR_MOVEMENT_SUCCESS, | |
9852 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
9853 | CURSOR_MOVEMENT_MUST_SCROLL, | |
9854 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
9855 | }; | |
47589c8c GM |
9856 | |
9857 | static int | |
9858 | try_cursor_movement (window, startp, scroll_step) | |
9859 | Lisp_Object window; | |
9860 | struct text_pos startp; | |
9861 | int *scroll_step; | |
9862 | { | |
9863 | struct window *w = XWINDOW (window); | |
9864 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 9865 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
47589c8c | 9866 | |
69d1f7c9 | 9867 | #if GLYPH_DEBUG |
76cb5e06 GM |
9868 | if (inhibit_try_cursor_movement) |
9869 | return rc; | |
9870 | #endif | |
9871 | ||
47589c8c GM |
9872 | /* Handle case where text has not changed, only point, and it has |
9873 | not moved off the frame. */ | |
9874 | if (/* Point may be in this window. */ | |
9875 | PT >= CHARPOS (startp) | |
47589c8c GM |
9876 | /* Selective display hasn't changed. */ |
9877 | && !current_buffer->clip_changed | |
4db87380 GM |
9878 | /* Function force-mode-line-update is used to force a thorough |
9879 | redisplay. It sets either windows_or_buffers_changed or | |
9880 | update_mode_lines. So don't take a shortcut here for these | |
9881 | cases. */ | |
9882 | && !update_mode_lines | |
9883 | && !windows_or_buffers_changed | |
5fb96e96 | 9884 | && !cursor_type_changed |
47589c8c GM |
9885 | /* Can't use this case if highlighting a region. When a |
9886 | region exists, cursor movement has to do more than just | |
9887 | set the cursor. */ | |
9888 | && !(!NILP (Vtransient_mark_mode) | |
9889 | && !NILP (current_buffer->mark_active)) | |
9890 | && NILP (w->region_showing) | |
9891 | && NILP (Vshow_trailing_whitespace) | |
9892 | /* Right after splitting windows, last_point may be nil. */ | |
9893 | && INTEGERP (w->last_point) | |
9894 | /* This code is not used for mini-buffer for the sake of the case | |
9895 | of redisplaying to replace an echo area message; since in | |
9896 | that case the mini-buffer contents per se are usually | |
9897 | unchanged. This code is of no real use in the mini-buffer | |
9898 | since the handling of this_line_start_pos, etc., in redisplay | |
9899 | handles the same cases. */ | |
9900 | && !EQ (window, minibuf_window) | |
9901 | /* When splitting windows or for new windows, it happens that | |
9902 | redisplay is called with a nil window_end_vpos or one being | |
9903 | larger than the window. This should really be fixed in | |
9904 | window.c. I don't have this on my list, now, so we do | |
9905 | approximately the same as the old redisplay code. --gerd. */ | |
9906 | && INTEGERP (w->window_end_vpos) | |
9907 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
9908 | && (FRAME_WINDOW_P (f) | |
9909 | || !MARKERP (Voverlay_arrow_position) | |
9910 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
9911 | { | |
9912 | int this_scroll_margin; | |
8ee5b6a3 | 9913 | struct glyph_row *row = NULL; |
47589c8c GM |
9914 | |
9915 | #if GLYPH_DEBUG | |
9916 | debug_method_add (w, "cursor movement"); | |
9917 | #endif | |
9918 | ||
9919 | /* Scroll if point within this distance from the top or bottom | |
9920 | of the window. This is a pixel value. */ | |
9921 | this_scroll_margin = max (0, scroll_margin); | |
9922 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
9923 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9924 | ||
9925 | /* Start with the row the cursor was displayed during the last | |
9926 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
9927 | if (w->last_cursor.vpos < 0 |
9928 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 9929 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9930 | else |
9931 | { | |
9932 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
9933 | if (row->mode_line_p) | |
9934 | ++row; | |
9935 | if (!row->enabled_p) | |
cb617e7c | 9936 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9937 | } |
9938 | ||
cb617e7c | 9939 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
9940 | { |
9941 | int scroll_p = 0; | |
68c5d1db GM |
9942 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
9943 | ||
47589c8c GM |
9944 | if (PT > XFASTINT (w->last_point)) |
9945 | { | |
9946 | /* Point has moved forward. */ | |
47589c8c GM |
9947 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
9948 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
9949 | { | |
9950 | xassert (row->enabled_p); | |
9951 | ++row; | |
9952 | } | |
9953 | ||
9954 | /* The end position of a row equals the start position | |
9955 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
9956 | display it in the next line. */ |
9957 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
9958 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
9959 | && !cursor_row_p (w, row)) | |
9960 | ++row; | |
47589c8c GM |
9961 | |
9962 | /* If within the scroll margin, scroll. Note that | |
9963 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
9964 | the next line would be drawn, and that | |
9965 | this_scroll_margin can be zero. */ | |
9966 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
9967 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
9968 | /* Line is completely visible last line in window | |
9969 | and PT is to be set in the next line. */ | |
9970 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
9971 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
9972 | && !row->ends_at_zv_p | |
9973 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
9974 | scroll_p = 1; | |
9975 | } | |
9976 | else if (PT < XFASTINT (w->last_point)) | |
9977 | { | |
9978 | /* Cursor has to be moved backward. Note that PT >= | |
9979 | CHARPOS (startp) because of the outer | |
9980 | if-statement. */ | |
9981 | while (!row->mode_line_p | |
9982 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
9983 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
9984 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
9985 | && (row->y > this_scroll_margin | |
9986 | || CHARPOS (startp) == BEGV)) | |
9987 | { | |
9988 | xassert (row->enabled_p); | |
9989 | --row; | |
9990 | } | |
9991 | ||
9992 | /* Consider the following case: Window starts at BEGV, | |
9993 | there is invisible, intangible text at BEGV, so that | |
9994 | display starts at some point START > BEGV. It can | |
9995 | happen that we are called with PT somewhere between | |
9996 | BEGV and START. Try to handle that case. */ | |
9997 | if (row < w->current_matrix->rows | |
9998 | || row->mode_line_p) | |
9999 | { | |
10000 | row = w->current_matrix->rows; | |
10001 | if (row->mode_line_p) | |
10002 | ++row; | |
10003 | } | |
10004 | ||
10005 | /* Due to newlines in overlay strings, we may have to | |
10006 | skip forward over overlay strings. */ | |
68c5d1db GM |
10007 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
10008 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
10009 | && !cursor_row_p (w, row)) | |
47589c8c GM |
10010 | ++row; |
10011 | ||
10012 | /* If within the scroll margin, scroll. */ | |
10013 | if (row->y < this_scroll_margin | |
10014 | && CHARPOS (startp) != BEGV) | |
10015 | scroll_p = 1; | |
10016 | } | |
10017 | ||
10018 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
10019 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
10020 | { | |
10021 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 10022 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 10023 | } |
440fc135 | 10024 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c | 10025 | { |
8de4aaf8 GM |
10026 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
10027 | && !row->ends_at_zv_p | |
10028 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 10029 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 10030 | else if (row->height > window_box_height (w)) |
440fc135 | 10031 | { |
8de4aaf8 GM |
10032 | /* If we end up in a partially visible line, let's |
10033 | make it fully visible, except when it's taller | |
10034 | than the window, in which case we can't do much | |
10035 | about it. */ | |
440fc135 | 10036 | *scroll_step = 1; |
cb617e7c | 10037 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
10038 | } |
10039 | else | |
10040 | { | |
10041 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
10042 | try_window (window, startp); | |
cb617e7c GM |
10043 | if (!make_cursor_line_fully_visible (w)) |
10044 | rc = CURSOR_MOVEMENT_NEED_LARGER_MATRICES; | |
10045 | else | |
10046 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 10047 | } |
47589c8c GM |
10048 | } |
10049 | else if (scroll_p) | |
cb617e7c | 10050 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10051 | else |
10052 | { | |
10053 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 10054 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
10055 | } |
10056 | } | |
10057 | } | |
10058 | ||
10059 | return rc; | |
10060 | } | |
10061 | ||
10062 | ||
5f5c8ee5 GM |
10063 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
10064 | selected_window is redisplayed. */ | |
90adcf20 | 10065 | |
a2889657 | 10066 | static void |
5f5c8ee5 | 10067 | redisplay_window (window, just_this_one_p) |
a2889657 | 10068 | Lisp_Object window; |
5f5c8ee5 | 10069 | int just_this_one_p; |
a2889657 | 10070 | { |
5f5c8ee5 GM |
10071 | struct window *w = XWINDOW (window); |
10072 | struct frame *f = XFRAME (w->frame); | |
10073 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 10074 | struct buffer *old = current_buffer; |
5f5c8ee5 | 10075 | struct text_pos lpoint, opoint, startp; |
e481f960 | 10076 | int update_mode_line; |
5f5c8ee5 GM |
10077 | int tem; |
10078 | struct it it; | |
10079 | /* Record it now because it's overwritten. */ | |
10080 | int current_matrix_up_to_date_p = 0; | |
5f5c8ee5 | 10081 | int temp_scroll_step = 0; |
2d27dae2 | 10082 | int count = BINDING_STACK_SIZE (); |
47589c8c | 10083 | int rc; |
a2889657 | 10084 | |
5f5c8ee5 GM |
10085 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
10086 | opoint = lpoint; | |
a2889657 | 10087 | |
5f5c8ee5 GM |
10088 | /* W must be a leaf window here. */ |
10089 | xassert (!NILP (w->buffer)); | |
10090 | #if GLYPH_DEBUG | |
10091 | *w->desired_matrix->method = 0; | |
10092 | #endif | |
2e54982e RS |
10093 | |
10094 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
10095 | |
10096 | reconsider_clip_changes (w, buffer); | |
10097 | ||
5f5c8ee5 GM |
10098 | /* Has the mode line to be updated? */ |
10099 | update_mode_line = (!NILP (w->update_mode_line) | |
10100 | || update_mode_lines | |
10101 | || buffer->clip_changed); | |
8de2d90b JB |
10102 | |
10103 | if (MINI_WINDOW_P (w)) | |
10104 | { | |
5f5c8ee5 | 10105 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 10106 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
10107 | { |
10108 | if (update_mode_line) | |
10109 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 10110 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
10111 | goto finish_menu_bars; |
10112 | else | |
10113 | /* We've already displayed the echo area glyphs in this window. */ | |
10114 | goto finish_scroll_bars; | |
10115 | } | |
73af359d | 10116 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 10117 | { |
5f5c8ee5 GM |
10118 | /* W is a mini-buffer window, but it's not the currently |
10119 | active one, so clear it. */ | |
10120 | int yb = window_text_bottom_y (w); | |
10121 | struct glyph_row *row; | |
10122 | int y; | |
10123 | ||
10124 | for (y = 0, row = w->desired_matrix->rows; | |
10125 | y < yb; | |
10126 | y += row->height, ++row) | |
10127 | blank_row (w, row, y); | |
88f22aff | 10128 | goto finish_scroll_bars; |
8de2d90b | 10129 | } |
c095a1dd GM |
10130 | |
10131 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 10132 | } |
a2889657 | 10133 | |
5f5c8ee5 GM |
10134 | /* Otherwise set up data on this window; select its buffer and point |
10135 | value. */ | |
6a93695f GM |
10136 | /* Really select the buffer, for the sake of buffer-local |
10137 | variables. */ | |
10138 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
10139 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
10140 | ||
10141 | current_matrix_up_to_date_p | |
10142 | = (!NILP (w->window_end_valid) | |
10143 | && !current_buffer->clip_changed | |
10144 | && XFASTINT (w->last_modified) >= MODIFF | |
10145 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 10146 | |
5f5c8ee5 GM |
10147 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
10148 | the window end being valid, so set it to nil there. */ | |
10149 | if (windows_or_buffers_changed) | |
10150 | { | |
10151 | /* If window starts on a continuation line, maybe adjust the | |
10152 | window start in case the window's width changed. */ | |
10153 | if (XMARKER (w->start)->buffer == current_buffer) | |
10154 | compute_window_start_on_continuation_line (w); | |
10155 | ||
10156 | w->window_end_valid = Qnil; | |
10157 | } | |
12adba34 | 10158 | |
5f5c8ee5 GM |
10159 | /* Some sanity checks. */ |
10160 | CHECK_WINDOW_END (w); | |
10161 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 10162 | abort (); |
5f5c8ee5 | 10163 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 10164 | abort (); |
a2889657 | 10165 | |
28995e67 RS |
10166 | /* If %c is in mode line, update it if needed. */ |
10167 | if (!NILP (w->column_number_displayed) | |
10168 | /* This alternative quickly identifies a common case | |
10169 | where no change is needed. */ | |
10170 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
10171 | && XFASTINT (w->last_modified) >= MODIFF |
10172 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
10173 | && XFASTINT (w->column_number_displayed) != current_column ()) |
10174 | update_mode_line = 1; | |
10175 | ||
5f5c8ee5 GM |
10176 | /* Count number of windows showing the selected buffer. An indirect |
10177 | buffer counts as its base buffer. */ | |
10178 | if (!just_this_one_p) | |
42640f83 RS |
10179 | { |
10180 | struct buffer *current_base, *window_base; | |
10181 | current_base = current_buffer; | |
10182 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
10183 | if (current_base->base_buffer) | |
10184 | current_base = current_base->base_buffer; | |
10185 | if (window_base->base_buffer) | |
10186 | window_base = window_base->base_buffer; | |
10187 | if (current_base == window_base) | |
10188 | buffer_shared++; | |
10189 | } | |
a2889657 | 10190 | |
5f5c8ee5 GM |
10191 | /* Point refers normally to the selected window. For any other |
10192 | window, set up appropriate value. */ | |
a2889657 JB |
10193 | if (!EQ (window, selected_window)) |
10194 | { | |
12adba34 RS |
10195 | int new_pt = XMARKER (w->pointm)->charpos; |
10196 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 10197 | if (new_pt < BEGV) |
a2889657 | 10198 | { |
f67a0f51 | 10199 | new_pt = BEGV; |
12adba34 RS |
10200 | new_pt_byte = BEGV_BYTE; |
10201 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 10202 | } |
f67a0f51 | 10203 | else if (new_pt > (ZV - 1)) |
a2889657 | 10204 | { |
f67a0f51 | 10205 | new_pt = ZV; |
12adba34 RS |
10206 | new_pt_byte = ZV_BYTE; |
10207 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 10208 | } |
5f5c8ee5 | 10209 | |
f67a0f51 | 10210 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 10211 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
10212 | } |
10213 | ||
f4faa47c | 10214 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
10215 | have changed, invalidate the width run cache. It's true that |
10216 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
10217 | redisplay goes (non-fatally) haywire when the display table is |
10218 | changed, so why should we worry about doing any better? */ | |
10219 | if (current_buffer->width_run_cache) | |
10220 | { | |
f908610f | 10221 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
10222 | |
10223 | if (! disptab_matches_widthtab (disptab, | |
10224 | XVECTOR (current_buffer->width_table))) | |
10225 | { | |
10226 | invalidate_region_cache (current_buffer, | |
10227 | current_buffer->width_run_cache, | |
10228 | BEG, Z); | |
10229 | recompute_width_table (current_buffer, disptab); | |
10230 | } | |
10231 | } | |
10232 | ||
a2889657 | 10233 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
10234 | if (XMARKER (w->start)->buffer != current_buffer) |
10235 | goto recenter; | |
10236 | ||
5f5c8ee5 | 10237 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 10238 | |
cf0df6ab RS |
10239 | /* If someone specified a new starting point but did not insist, |
10240 | check whether it can be used. */ | |
cfad01b4 GM |
10241 | if (!NILP (w->optional_new_start) |
10242 | && CHARPOS (startp) >= BEGV | |
10243 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
10244 | { |
10245 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
10246 | start_display (&it, w, startp); |
10247 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10248 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10249 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
10250 | w->force_start = Qt; |
10251 | } | |
10252 | ||
8de2d90b | 10253 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 10254 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
10255 | if (!NILP (w->force_start) |
10256 | || w->frozen_window_start_p) | |
a2889657 | 10257 | { |
e63574d7 | 10258 | w->force_start = Qnil; |
5f5c8ee5 | 10259 | w->vscroll = 0; |
b5174a51 | 10260 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
10261 | |
10262 | /* Forget any recorded base line for line number display. */ | |
10263 | if (!current_matrix_up_to_date_p | |
10264 | || current_buffer->clip_changed) | |
10265 | w->base_line_number = Qnil; | |
10266 | ||
75c43375 RS |
10267 | /* Redisplay the mode line. Select the buffer properly for that. |
10268 | Also, run the hook window-scroll-functions | |
10269 | because we have scrolled. */ | |
e63574d7 RS |
10270 | /* Note, we do this after clearing force_start because |
10271 | if there's an error, it is better to forget about force_start | |
10272 | than to get into an infinite loop calling the hook functions | |
10273 | and having them get more errors. */ | |
75c43375 RS |
10274 | if (!update_mode_line |
10275 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 10276 | { |
e481f960 RS |
10277 | update_mode_line = 1; |
10278 | w->update_mode_line = Qt; | |
5f5c8ee5 | 10279 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 10280 | } |
5f5c8ee5 | 10281 | |
ac90c44f GM |
10282 | w->last_modified = make_number (0); |
10283 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
10284 | if (CHARPOS (startp) < BEGV) |
10285 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
10286 | else if (CHARPOS (startp) > ZV) | |
10287 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
10288 | ||
10289 | /* Redisplay, then check if cursor has been set during the | |
10290 | redisplay. Give up if new fonts were loaded. */ | |
10291 | if (!try_window (window, startp)) | |
10292 | { | |
10293 | w->force_start = Qt; | |
10294 | clear_glyph_matrix (w->desired_matrix); | |
504454e8 | 10295 | goto finish_scroll_bars; |
5f5c8ee5 GM |
10296 | } |
10297 | ||
9472f927 | 10298 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 10299 | { |
b28cb6ed GM |
10300 | /* If point does not appear, try to move point so it does |
10301 | appear. The desired matrix has been built above, so we | |
10302 | can use it here. */ | |
10303 | int window_height; | |
10304 | struct glyph_row *row; | |
10305 | ||
10306 | window_height = window_box_height (w) / 2; | |
10307 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); | |
10308 | while (MATRIX_ROW_BOTTOM_Y (row) < window_height) | |
5f5c8ee5 GM |
10309 | ++row; |
10310 | ||
10311 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
10312 | MATRIX_ROW_START_BYTEPOS (row)); | |
10313 | ||
90adcf20 | 10314 | if (w != XWINDOW (selected_window)) |
12adba34 | 10315 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
10316 | else if (current_buffer == old) |
10317 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
10318 | ||
10319 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
10320 | ||
10321 | /* If we are highlighting the region, then we just changed | |
10322 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
10323 | if (!NILP (Vtransient_mark_mode) |
10324 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 10325 | { |
5f5c8ee5 GM |
10326 | clear_glyph_matrix (w->desired_matrix); |
10327 | if (!try_window (window, startp)) | |
cb617e7c | 10328 | goto need_larger_matrices; |
6f27fa9b | 10329 | } |
a2889657 | 10330 | } |
5f5c8ee5 | 10331 | |
cb617e7c GM |
10332 | if (!make_cursor_line_fully_visible (w)) |
10333 | goto need_larger_matrices; | |
5f5c8ee5 GM |
10334 | #if GLYPH_DEBUG |
10335 | debug_method_add (w, "forced window start"); | |
10336 | #endif | |
a2889657 JB |
10337 | goto done; |
10338 | } | |
10339 | ||
5f5c8ee5 GM |
10340 | /* Handle case where text has not changed, only point, and it has |
10341 | not moved off the frame. */ | |
10342 | if (current_matrix_up_to_date_p | |
47589c8c | 10343 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 10344 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 10345 | { |
cb617e7c GM |
10346 | switch (rc) |
10347 | { | |
10348 | case CURSOR_MOVEMENT_SUCCESS: | |
10349 | goto done; | |
10350 | ||
10351 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: | |
10352 | goto need_larger_matrices; | |
10353 | ||
10354 | case CURSOR_MOVEMENT_MUST_SCROLL: | |
10355 | goto try_to_scroll; | |
10356 | ||
10357 | default: | |
10358 | abort (); | |
10359 | } | |
a2889657 JB |
10360 | } |
10361 | /* If current starting point was originally the beginning of a line | |
10362 | but no longer is, find a new starting point. */ | |
265a9e55 | 10363 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
10364 | && !(CHARPOS (startp) <= BEGV |
10365 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 10366 | { |
5f5c8ee5 GM |
10367 | #if GLYPH_DEBUG |
10368 | debug_method_add (w, "recenter 1"); | |
10369 | #endif | |
a2889657 JB |
10370 | goto recenter; |
10371 | } | |
5f5c8ee5 | 10372 | |
27d16f05 GM |
10373 | /* Try scrolling with try_window_id. Value is > 0 if update has |
10374 | been done, it is -1 if we know that the same window start will | |
10375 | not work. It is 0 if unsuccessful for some other reason. */ | |
10376 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 10377 | { |
5f5c8ee5 | 10378 | #if GLYPH_DEBUG |
ef121659 | 10379 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
10380 | #endif |
10381 | ||
10382 | if (fonts_changed_p) | |
cb617e7c | 10383 | goto need_larger_matrices; |
a2889657 JB |
10384 | if (tem > 0) |
10385 | goto done; | |
ef121659 | 10386 | |
5f5c8ee5 GM |
10387 | /* Otherwise try_window_id has returned -1 which means that we |
10388 | don't want the alternative below this comment to execute. */ | |
a2889657 | 10389 | } |
5f5c8ee5 GM |
10390 | else if (CHARPOS (startp) >= BEGV |
10391 | && CHARPOS (startp) <= ZV | |
10392 | && PT >= CHARPOS (startp) | |
10393 | && (CHARPOS (startp) < ZV | |
e9874cee | 10394 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 10395 | || CHARPOS (startp) == BEGV |
8850a573 RS |
10396 | || (XFASTINT (w->last_modified) >= MODIFF |
10397 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 10398 | { |
5f5c8ee5 GM |
10399 | #if GLYPH_DEBUG |
10400 | debug_method_add (w, "same window start"); | |
10401 | #endif | |
10402 | ||
10403 | /* Try to redisplay starting at same place as before. | |
10404 | If point has not moved off frame, accept the results. */ | |
10405 | if (!current_matrix_up_to_date_p | |
10406 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
10407 | because a window scroll function can have changed the |
10408 | buffer. */ | |
5f5c8ee5 GM |
10409 | || !NILP (Vwindow_scroll_functions) |
10410 | || MINI_WINDOW_P (w) | |
10411 | || !try_window_reusing_current_matrix (w)) | |
10412 | { | |
10413 | IF_DEBUG (debug_method_add (w, "1")); | |
10414 | try_window (window, startp); | |
10415 | } | |
10416 | ||
10417 | if (fonts_changed_p) | |
cb617e7c | 10418 | goto need_larger_matrices; |
5f5c8ee5 GM |
10419 | |
10420 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 10421 | { |
5f5c8ee5 GM |
10422 | if (!just_this_one_p |
10423 | || current_buffer->clip_changed | |
9142dd5b | 10424 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
10425 | /* Forget any recorded base line for line number display. */ |
10426 | w->base_line_number = Qnil; | |
5f5c8ee5 | 10427 | |
cb617e7c GM |
10428 | if (!make_cursor_line_fully_visible (w)) |
10429 | goto need_larger_matrices; | |
aa6d10fa RS |
10430 | goto done; |
10431 | } | |
a2889657 | 10432 | else |
5f5c8ee5 | 10433 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
10434 | } |
10435 | ||
5f5c8ee5 GM |
10436 | try_to_scroll: |
10437 | ||
ac90c44f GM |
10438 | w->last_modified = make_number (0); |
10439 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 10440 | |
e481f960 RS |
10441 | /* Redisplay the mode line. Select the buffer properly for that. */ |
10442 | if (!update_mode_line) | |
10443 | { | |
e481f960 RS |
10444 | update_mode_line = 1; |
10445 | w->update_mode_line = Qt; | |
10446 | } | |
a2889657 | 10447 | |
5f5c8ee5 GM |
10448 | /* Try to scroll by specified few lines. */ |
10449 | if ((scroll_conservatively | |
10450 | || scroll_step | |
10451 | || temp_scroll_step | |
10452 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
10453 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 10454 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
10455 | && CHARPOS (startp) >= BEGV |
10456 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 10457 | { |
5f5c8ee5 GM |
10458 | /* The function returns -1 if new fonts were loaded, 1 if |
10459 | successful, 0 if not successful. */ | |
10460 | int rc = try_scrolling (window, just_this_one_p, | |
10461 | scroll_conservatively, | |
10462 | scroll_step, | |
10463 | temp_scroll_step); | |
cb617e7c GM |
10464 | switch (rc) |
10465 | { | |
10466 | case SCROLLING_SUCCESS: | |
10467 | goto done; | |
10468 | ||
10469 | case SCROLLING_NEED_LARGER_MATRICES: | |
10470 | goto need_larger_matrices; | |
10471 | ||
10472 | case SCROLLING_FAILED: | |
10473 | break; | |
10474 | ||
10475 | default: | |
10476 | abort (); | |
10477 | } | |
5f5c8ee5 | 10478 | } |
f9c8af06 | 10479 | |
5f5c8ee5 | 10480 | /* Finally, just choose place to start which centers point */ |
5936754e | 10481 | |
5f5c8ee5 | 10482 | recenter: |
44173109 | 10483 | |
5f5c8ee5 GM |
10484 | #if GLYPH_DEBUG |
10485 | debug_method_add (w, "recenter"); | |
10486 | #endif | |
0789adb2 | 10487 | |
5f5c8ee5 | 10488 | /* w->vscroll = 0; */ |
0789adb2 | 10489 | |
5f5c8ee5 GM |
10490 | /* Forget any previously recorded base line for line number display. */ |
10491 | if (!current_matrix_up_to_date_p | |
10492 | || current_buffer->clip_changed) | |
10493 | w->base_line_number = Qnil; | |
10494 | ||
10495 | /* Move backward half the height of the window. */ | |
10496 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10497 | it.current_y = it.last_visible_y; | |
3a030013 | 10498 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
5f5c8ee5 GM |
10499 | xassert (IT_CHARPOS (it) >= BEGV); |
10500 | ||
10501 | /* The function move_it_vertically_backward may move over more | |
10502 | than the specified y-distance. If it->w is small, e.g. a | |
10503 | mini-buffer window, we may end up in front of the window's | |
10504 | display area. Start displaying at the start of the line | |
10505 | containing PT in this case. */ | |
10506 | if (it.current_y <= 0) | |
10507 | { | |
10508 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10509 | move_it_vertically (&it, 0); | |
10510 | xassert (IT_CHARPOS (it) <= PT); | |
10511 | it.current_y = 0; | |
0789adb2 RS |
10512 | } |
10513 | ||
5f5c8ee5 GM |
10514 | it.current_x = it.hpos = 0; |
10515 | ||
10516 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
10517 | in case the window-scroll-functions functions get errors. */ | |
10518 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
10519 | ||
10520 | /* Run scroll hooks. */ | |
10521 | startp = run_window_scroll_functions (window, it.current.pos); | |
10522 | ||
10523 | /* Redisplay the window. */ | |
10524 | if (!current_matrix_up_to_date_p | |
10525 | || windows_or_buffers_changed | |
5fb96e96 | 10526 | || cursor_type_changed |
5f5c8ee5 GM |
10527 | /* Don't use try_window_reusing_current_matrix in this case |
10528 | because it can have changed the buffer. */ | |
10529 | || !NILP (Vwindow_scroll_functions) | |
10530 | || !just_this_one_p | |
10531 | || MINI_WINDOW_P (w) | |
10532 | || !try_window_reusing_current_matrix (w)) | |
10533 | try_window (window, startp); | |
10534 | ||
10535 | /* If new fonts have been loaded (due to fontsets), give up. We | |
10536 | have to start a new redisplay since we need to re-adjust glyph | |
10537 | matrices. */ | |
10538 | if (fonts_changed_p) | |
cb617e7c | 10539 | goto need_larger_matrices; |
5f5c8ee5 GM |
10540 | |
10541 | /* If cursor did not appear assume that the middle of the window is | |
10542 | in the first line of the window. Do it again with the next line. | |
10543 | (Imagine a window of height 100, displaying two lines of height | |
10544 | 60. Moving back 50 from it->last_visible_y will end in the first | |
10545 | line.) */ | |
10546 | if (w->cursor.vpos < 0) | |
a2889657 | 10547 | { |
5f5c8ee5 GM |
10548 | if (!NILP (w->window_end_valid) |
10549 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 10550 | { |
5f5c8ee5 GM |
10551 | clear_glyph_matrix (w->desired_matrix); |
10552 | move_it_by_lines (&it, 1, 0); | |
10553 | try_window (window, it.current.pos); | |
a2889657 | 10554 | } |
5f5c8ee5 | 10555 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 10556 | { |
5f5c8ee5 GM |
10557 | clear_glyph_matrix (w->desired_matrix); |
10558 | move_it_by_lines (&it, -1, 0); | |
10559 | try_window (window, it.current.pos); | |
10560 | } | |
10561 | else | |
10562 | { | |
10563 | /* Not much we can do about it. */ | |
a2889657 | 10564 | } |
a2889657 | 10565 | } |
010494d0 | 10566 | |
5f5c8ee5 GM |
10567 | /* Consider the following case: Window starts at BEGV, there is |
10568 | invisible, intangible text at BEGV, so that display starts at | |
10569 | some point START > BEGV. It can happen that we are called with | |
10570 | PT somewhere between BEGV and START. Try to handle that case. */ | |
10571 | if (w->cursor.vpos < 0) | |
835766b6 | 10572 | { |
5f5c8ee5 GM |
10573 | struct glyph_row *row = w->current_matrix->rows; |
10574 | if (row->mode_line_p) | |
10575 | ++row; | |
10576 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 10577 | } |
5f5c8ee5 | 10578 | |
cb617e7c GM |
10579 | if (!make_cursor_line_fully_visible (w)) |
10580 | goto need_larger_matrices; | |
b5174a51 | 10581 | |
74d481ac GM |
10582 | done: |
10583 | ||
5f5c8ee5 GM |
10584 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
10585 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
10586 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
10587 | ? Qt : Qnil); | |
a2889657 | 10588 | |
5f5c8ee5 | 10589 | /* Display the mode line, if we must. */ |
e481f960 | 10590 | if ((update_mode_line |
aa6d10fa | 10591 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
10592 | if (a) the window to its side is being redone and |
10593 | (b) we do a frame-based redisplay. This is a consequence | |
10594 | of how inverted lines are drawn in frame-based redisplay. */ | |
10595 | || (!just_this_one_p | |
10596 | && !FRAME_WINDOW_P (f) | |
10597 | && !WINDOW_FULL_WIDTH_P (w)) | |
10598 | /* Line number to display. */ | |
155ef550 | 10599 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 10600 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
10601 | || (!NILP (w->column_number_displayed) |
10602 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
10603 | /* This means that the window has a mode line. */ |
10604 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 10605 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 10606 | { |
5f5c8ee5 GM |
10607 | display_mode_lines (w); |
10608 | ||
10609 | /* If mode line height has changed, arrange for a thorough | |
10610 | immediate redisplay using the correct mode line height. */ | |
10611 | if (WINDOW_WANTS_MODELINE_P (w) | |
10612 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 10613 | { |
5f5c8ee5 GM |
10614 | fonts_changed_p = 1; |
10615 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
10616 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 10617 | } |
5f5c8ee5 GM |
10618 | |
10619 | /* If top line height has changed, arrange for a thorough | |
10620 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
10621 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10622 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
10623 | { |
10624 | fonts_changed_p = 1; | |
045dee35 GM |
10625 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
10626 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
10627 | } |
10628 | ||
10629 | if (fonts_changed_p) | |
cb617e7c | 10630 | goto need_larger_matrices; |
5ba50c51 | 10631 | } |
5f5c8ee5 GM |
10632 | |
10633 | if (!line_number_displayed | |
10634 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
10635 | { |
10636 | w->base_line_pos = Qnil; | |
10637 | w->base_line_number = Qnil; | |
10638 | } | |
a2889657 | 10639 | |
5f5c8ee5 GM |
10640 | finish_menu_bars: |
10641 | ||
7ce2c095 | 10642 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 10643 | if (update_mode_line |
5f5c8ee5 GM |
10644 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
10645 | { | |
10646 | int redisplay_menu_p = 0; | |
10647 | ||
10648 | if (FRAME_WINDOW_P (f)) | |
10649 | { | |
e0f712ba | 10650 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (MAC_OS) |
5f5c8ee5 | 10651 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 10652 | #else |
5f5c8ee5 | 10653 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 10654 | #endif |
5f5c8ee5 GM |
10655 | } |
10656 | else | |
10657 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
10658 | ||
10659 | if (redisplay_menu_p) | |
10660 | display_menu_bar (w); | |
10661 | ||
10662 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
10663 | if (WINDOWP (f->tool_bar_window) |
10664 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
10665 | || auto_resize_tool_bars_p)) | |
10666 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
10667 | #endif |
10668 | } | |
7ce2c095 | 10669 | |
cb617e7c GM |
10670 | need_larger_matrices: |
10671 | ; | |
88f22aff | 10672 | finish_scroll_bars: |
5f5c8ee5 | 10673 | |
88f22aff | 10674 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 10675 | { |
b1d1124b | 10676 | int start, end, whole; |
30c566e4 | 10677 | |
b1d1124b | 10678 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
10679 | At some point, it would be nice to choose between scrollbars |
10680 | which reflect the whole buffer size, with special markers | |
10681 | indicating narrowing, and scrollbars which reflect only the | |
10682 | visible region. | |
10683 | ||
5f5c8ee5 | 10684 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 10685 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 10686 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 10687 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 10688 | { |
8a9311d7 | 10689 | whole = ZV - BEGV; |
4d641a15 | 10690 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
10691 | /* I don't think this is guaranteed to be right. For the |
10692 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 10693 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 10694 | |
5f5c8ee5 GM |
10695 | if (end < start) |
10696 | end = start; | |
10697 | if (whole < (end - start)) | |
10698 | whole = end - start; | |
b1d1124b JB |
10699 | } |
10700 | else | |
10701 | start = end = whole = 0; | |
30c566e4 | 10702 | |
88f22aff | 10703 | /* Indicate what this scroll bar ought to be displaying now. */ |
504454e8 | 10704 | set_vertical_scroll_bar_hook (w, end - start, whole, start); |
30c566e4 | 10705 | |
5f5c8ee5 GM |
10706 | /* Note that we actually used the scroll bar attached to this |
10707 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 10708 | redeem_scroll_bar_hook (w); |
30c566e4 | 10709 | } |
b1d1124b | 10710 | |
5f5c8ee5 GM |
10711 | /* Restore current_buffer and value of point in it. */ |
10712 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 10713 | set_buffer_internal_1 (old); |
5f5c8ee5 | 10714 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
10715 | |
10716 | unbind_to (count, Qnil); | |
a2889657 | 10717 | } |
a2889657 | 10718 | |
5f5c8ee5 GM |
10719 | |
10720 | /* Build the complete desired matrix of WINDOW with a window start | |
10721 | buffer position POS. Value is non-zero if successful. It is zero | |
10722 | if fonts were loaded during redisplay which makes re-adjusting | |
10723 | glyph matrices necessary. */ | |
10724 | ||
10725 | int | |
a2889657 JB |
10726 | try_window (window, pos) |
10727 | Lisp_Object window; | |
5f5c8ee5 GM |
10728 | struct text_pos pos; |
10729 | { | |
10730 | struct window *w = XWINDOW (window); | |
10731 | struct it it; | |
10732 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 10733 | |
5f5c8ee5 GM |
10734 | /* Make POS the new window start. */ |
10735 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 10736 | |
5f5c8ee5 GM |
10737 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
10738 | w->cursor.vpos = -1; | |
a2889657 | 10739 | overlay_arrow_seen = 0; |
642eefc6 | 10740 | |
5f5c8ee5 GM |
10741 | /* Initialize iterator and info to start at POS. */ |
10742 | start_display (&it, w, pos); | |
a2889657 | 10743 | |
5f5c8ee5 GM |
10744 | /* Display all lines of W. */ |
10745 | while (it.current_y < it.last_visible_y) | |
10746 | { | |
10747 | if (display_line (&it)) | |
10748 | last_text_row = it.glyph_row - 1; | |
10749 | if (fonts_changed_p) | |
10750 | return 0; | |
10751 | } | |
a2889657 | 10752 | |
5f5c8ee5 GM |
10753 | /* If bottom moved off end of frame, change mode line percentage. */ |
10754 | if (XFASTINT (w->window_end_pos) <= 0 | |
10755 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
10756 | w->update_mode_line = Qt; |
10757 | ||
5f5c8ee5 GM |
10758 | /* Set window_end_pos to the offset of the last character displayed |
10759 | on the window from the end of current_buffer. Set | |
10760 | window_end_vpos to its row number. */ | |
10761 | if (last_text_row) | |
10762 | { | |
10763 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
10764 | w->window_end_bytepos | |
10765 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10766 | w->window_end_pos |
10767 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10768 | w->window_end_vpos | |
10769 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10770 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
10771 | ->displays_text_p); | |
10772 | } | |
10773 | else | |
10774 | { | |
10775 | w->window_end_bytepos = 0; | |
ac90c44f | 10776 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
10777 | } |
10778 | ||
a2889657 JB |
10779 | /* But that is not valid info until redisplay finishes. */ |
10780 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 10781 | return 1; |
a2889657 | 10782 | } |
5f5c8ee5 GM |
10783 | |
10784 | ||
a2889657 | 10785 | \f |
5f5c8ee5 GM |
10786 | /************************************************************************ |
10787 | Window redisplay reusing current matrix when buffer has not changed | |
10788 | ************************************************************************/ | |
10789 | ||
10790 | /* Try redisplay of window W showing an unchanged buffer with a | |
10791 | different window start than the last time it was displayed by | |
10792 | reusing its current matrix. Value is non-zero if successful. | |
10793 | W->start is the new window start. */ | |
a2889657 JB |
10794 | |
10795 | static int | |
5f5c8ee5 GM |
10796 | try_window_reusing_current_matrix (w) |
10797 | struct window *w; | |
a2889657 | 10798 | { |
5f5c8ee5 GM |
10799 | struct frame *f = XFRAME (w->frame); |
10800 | struct glyph_row *row, *bottom_row; | |
10801 | struct it it; | |
10802 | struct run run; | |
10803 | struct text_pos start, new_start; | |
10804 | int nrows_scrolled, i; | |
10805 | struct glyph_row *last_text_row; | |
10806 | struct glyph_row *last_reused_text_row; | |
10807 | struct glyph_row *start_row; | |
10808 | int start_vpos, min_y, max_y; | |
75c5350a | 10809 | |
69d1f7c9 | 10810 | #if GLYPH_DEBUG |
76cb5e06 GM |
10811 | if (inhibit_try_window_reusing) |
10812 | return 0; | |
10813 | #endif | |
10814 | ||
d18354b6 GM |
10815 | if (/* This function doesn't handle terminal frames. */ |
10816 | !FRAME_WINDOW_P (f) | |
10817 | /* Don't try to reuse the display if windows have been split | |
10818 | or such. */ | |
5fb96e96 RS |
10819 | || windows_or_buffers_changed |
10820 | || cursor_type_changed) | |
5f5c8ee5 | 10821 | return 0; |
a2889657 | 10822 | |
5f5c8ee5 GM |
10823 | /* Can't do this if region may have changed. */ |
10824 | if ((!NILP (Vtransient_mark_mode) | |
10825 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
10826 | || !NILP (w->region_showing) |
10827 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 10828 | return 0; |
a2889657 | 10829 | |
5f5c8ee5 | 10830 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
10831 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10832 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
10833 | return 0; |
10834 | ||
10835 | /* Give up if old or new display is scrolled vertically. We could | |
10836 | make this function handle this, but right now it doesn't. */ | |
10837 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10838 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
10839 | return 0; | |
10840 | ||
10841 | /* The variable new_start now holds the new window start. The old | |
10842 | start `start' can be determined from the current matrix. */ | |
10843 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
10844 | start = start_row->start.pos; | |
10845 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 10846 | |
5f5c8ee5 GM |
10847 | /* Clear the desired matrix for the display below. */ |
10848 | clear_glyph_matrix (w->desired_matrix); | |
10849 | ||
10850 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
10851 | { | |
10852 | int first_row_y; | |
10853 | ||
607ec83c GM |
10854 | /* Don't use this method if the display starts with an ellipsis |
10855 | displayed for invisible text. It's not easy to handle that case | |
10856 | below, and it's certainly not worth the effort since this is | |
10857 | not a frequent case. */ | |
10858 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
10859 | return 0; | |
10860 | ||
5f5c8ee5 GM |
10861 | IF_DEBUG (debug_method_add (w, "twu1")); |
10862 | ||
10863 | /* Display up to a row that can be reused. The variable | |
10864 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
10865 | text. Note that it.vpos == 0 if or if not there is a |
10866 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
10867 | start_display (&it, w, new_start); |
10868 | first_row_y = it.current_y; | |
10869 | w->cursor.vpos = -1; | |
10870 | last_text_row = last_reused_text_row = NULL; | |
b48f74cb | 10871 | |
5f5c8ee5 GM |
10872 | while (it.current_y < it.last_visible_y |
10873 | && IT_CHARPOS (it) < CHARPOS (start) | |
10874 | && !fonts_changed_p) | |
10875 | if (display_line (&it)) | |
10876 | last_text_row = it.glyph_row - 1; | |
10877 | ||
10878 | /* A value of current_y < last_visible_y means that we stopped | |
10879 | at the previous window start, which in turn means that we | |
10880 | have at least one reusable row. */ | |
10881 | if (it.current_y < it.last_visible_y) | |
a2889657 | 10882 | { |
b48f74cb | 10883 | /* IT.vpos always starts from 0; it counts text lines. */ |
5f5c8ee5 GM |
10884 | nrows_scrolled = it.vpos; |
10885 | ||
10886 | /* Find PT if not already found in the lines displayed. */ | |
10887 | if (w->cursor.vpos < 0) | |
a2889657 | 10888 | { |
5f5c8ee5 GM |
10889 | int dy = it.current_y - first_row_y; |
10890 | ||
10891 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
0df56f4d GM |
10892 | row = row_containing_pos (w, PT, row, NULL, dy); |
10893 | if (row) | |
10894 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
10895 | dy, nrows_scrolled); | |
10896 | else | |
5f5c8ee5 GM |
10897 | { |
10898 | clear_glyph_matrix (w->desired_matrix); | |
10899 | return 0; | |
10900 | } | |
a2889657 | 10901 | } |
5f5c8ee5 GM |
10902 | |
10903 | /* Scroll the display. Do it before the current matrix is | |
10904 | changed. The problem here is that update has not yet | |
10905 | run, i.e. part of the current matrix is not up to date. | |
10906 | scroll_run_hook will clear the cursor, and use the | |
10907 | current matrix to get the height of the row the cursor is | |
10908 | in. */ | |
10909 | run.current_y = first_row_y; | |
10910 | run.desired_y = it.current_y; | |
10911 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
10912 | |
10913 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 10914 | { |
5f5c8ee5 GM |
10915 | update_begin (f); |
10916 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 10917 | rif->clear_mouse_face (w); |
5f5c8ee5 | 10918 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 10919 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 10920 | update_end (f); |
a2889657 | 10921 | } |
5f5c8ee5 GM |
10922 | |
10923 | /* Shift current matrix down by nrows_scrolled lines. */ | |
10924 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
10925 | rotate_matrix (w->current_matrix, | |
10926 | start_vpos, | |
10927 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
10928 | nrows_scrolled); | |
10929 | ||
9c8b8382 | 10930 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 10931 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 10932 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 10933 | |
5f5c8ee5 | 10934 | /* Re-compute Y positions. */ |
045dee35 | 10935 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 10936 | max_y = it.last_visible_y; |
b48f74cb GM |
10937 | for (row = start_row + nrows_scrolled; |
10938 | row < bottom_row; | |
10939 | ++row) | |
d2f84654 | 10940 | { |
5f5c8ee5 | 10941 | row->y = it.current_y; |
75c5350a | 10942 | row->visible_height = row->height; |
5f5c8ee5 GM |
10943 | |
10944 | if (row->y < min_y) | |
75c5350a GM |
10945 | row->visible_height -= min_y - row->y; |
10946 | if (row->y + row->height > max_y) | |
10947 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
10948 | |
10949 | it.current_y += row->height; | |
5f5c8ee5 GM |
10950 | |
10951 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
10952 | last_reused_text_row = row; | |
10953 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
10954 | break; | |
d2f84654 | 10955 | } |
9c8b8382 GM |
10956 | |
10957 | /* Disable lines in the current matrix which are now | |
10958 | below the window. */ | |
bafb434c | 10959 | for (++row; row < bottom_row; ++row) |
9c8b8382 | 10960 | row->enabled_p = 0; |
a2889657 | 10961 | } |
5f5c8ee5 GM |
10962 | |
10963 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
10964 | reused row from the current matrix containing text, if any. | |
10965 | The value of last_text_row is the last displayed line | |
10966 | containing text. */ | |
10967 | if (last_reused_text_row) | |
a2889657 | 10968 | { |
5f5c8ee5 GM |
10969 | w->window_end_bytepos |
10970 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
10971 | w->window_end_pos |
10972 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
10973 | w->window_end_vpos | |
10974 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
10975 | w->current_matrix)); | |
a2889657 | 10976 | } |
5f5c8ee5 GM |
10977 | else if (last_text_row) |
10978 | { | |
10979 | w->window_end_bytepos | |
10980 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10981 | w->window_end_pos |
10982 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10983 | w->window_end_vpos | |
10984 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10985 | } |
10986 | else | |
10987 | { | |
10988 | /* This window must be completely empty. */ | |
10989 | w->window_end_bytepos = 0; | |
ac90c44f | 10990 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
10991 | } |
10992 | w->window_end_valid = Qnil; | |
a2889657 | 10993 | |
5f5c8ee5 GM |
10994 | /* Update hint: don't try scrolling again in update_window. */ |
10995 | w->desired_matrix->no_scrolling_p = 1; | |
10996 | ||
10997 | #if GLYPH_DEBUG | |
10998 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
10999 | #endif | |
11000 | return 1; | |
a2889657 | 11001 | } |
5f5c8ee5 GM |
11002 | else if (CHARPOS (new_start) > CHARPOS (start)) |
11003 | { | |
11004 | struct glyph_row *pt_row, *row; | |
11005 | struct glyph_row *first_reusable_row; | |
11006 | struct glyph_row *first_row_to_display; | |
11007 | int dy; | |
11008 | int yb = window_text_bottom_y (w); | |
11009 | ||
5f5c8ee5 GM |
11010 | /* Find the row starting at new_start, if there is one. Don't |
11011 | reuse a partially visible line at the end. */ | |
b48f74cb | 11012 | first_reusable_row = start_row; |
5f5c8ee5 GM |
11013 | while (first_reusable_row->enabled_p |
11014 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
11015 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
11016 | < CHARPOS (new_start))) | |
11017 | ++first_reusable_row; | |
11018 | ||
11019 | /* Give up if there is no row to reuse. */ | |
11020 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
11021 | || !first_reusable_row->enabled_p |
11022 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
11023 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
11024 | return 0; |
11025 | ||
5f5c8ee5 GM |
11026 | /* We can reuse fully visible rows beginning with |
11027 | first_reusable_row to the end of the window. Set | |
11028 | first_row_to_display to the first row that cannot be reused. | |
11029 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 11030 | pt_row = NULL; |
ac90c44f GM |
11031 | for (first_row_to_display = first_reusable_row; |
11032 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
11033 | ++first_row_to_display) | |
5f5c8ee5 | 11034 | { |
4bde0ebb GM |
11035 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
11036 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 11037 | pt_row = first_row_to_display; |
5f5c8ee5 | 11038 | } |
a2889657 | 11039 | |
5f5c8ee5 GM |
11040 | /* Start displaying at the start of first_row_to_display. */ |
11041 | xassert (first_row_to_display->y < yb); | |
11042 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 11043 | |
b48f74cb GM |
11044 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
11045 | - start_vpos); | |
5f5c8ee5 GM |
11046 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
11047 | - nrows_scrolled); | |
b48f74cb GM |
11048 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
11049 | + WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); | |
5f5c8ee5 GM |
11050 | |
11051 | /* Display lines beginning with first_row_to_display in the | |
11052 | desired matrix. Set last_text_row to the last row displayed | |
11053 | that displays text. */ | |
11054 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
11055 | if (pt_row == NULL) | |
11056 | w->cursor.vpos = -1; | |
11057 | last_text_row = NULL; | |
11058 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
11059 | if (display_line (&it)) | |
11060 | last_text_row = it.glyph_row - 1; | |
11061 | ||
11062 | /* Give up If point isn't in a row displayed or reused. */ | |
11063 | if (w->cursor.vpos < 0) | |
11064 | { | |
11065 | clear_glyph_matrix (w->desired_matrix); | |
11066 | return 0; | |
11067 | } | |
12adba34 | 11068 | |
5f5c8ee5 GM |
11069 | /* If point is in a reused row, adjust y and vpos of the cursor |
11070 | position. */ | |
11071 | if (pt_row) | |
11072 | { | |
11073 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
11074 | w->current_matrix); | |
11075 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
11076 | } |
11077 | ||
5f5c8ee5 GM |
11078 | /* Scroll the display. */ |
11079 | run.current_y = first_reusable_row->y; | |
045dee35 | 11080 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11081 | run.height = it.last_visible_y - run.current_y; |
4da61803 GM |
11082 | dy = run.current_y - run.desired_y; |
11083 | ||
5f5c8ee5 GM |
11084 | if (run.height) |
11085 | { | |
11086 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
11087 | update_begin (f); | |
11088 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11089 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11090 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11091 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11092 | update_end (f); |
11093 | } | |
a2889657 | 11094 | |
5f5c8ee5 GM |
11095 | /* Adjust Y positions of reused rows. */ |
11096 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
045dee35 | 11097 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11098 | max_y = it.last_visible_y; |
b48f74cb | 11099 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
11100 | { |
11101 | row->y -= dy; | |
75c5350a | 11102 | row->visible_height = row->height; |
5f5c8ee5 | 11103 | if (row->y < min_y) |
75c5350a GM |
11104 | row->visible_height -= min_y - row->y; |
11105 | if (row->y + row->height > max_y) | |
11106 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 11107 | } |
a2889657 | 11108 | |
5f5c8ee5 GM |
11109 | /* Scroll the current matrix. */ |
11110 | xassert (nrows_scrolled > 0); | |
11111 | rotate_matrix (w->current_matrix, | |
11112 | start_vpos, | |
11113 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
11114 | -nrows_scrolled); | |
11115 | ||
ac90c44f GM |
11116 | /* Disable rows not reused. */ |
11117 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
11118 | row->enabled_p = 0; | |
11119 | ||
5f5c8ee5 GM |
11120 | /* Adjust window end. A null value of last_text_row means that |
11121 | the window end is in reused rows which in turn means that | |
11122 | only its vpos can have changed. */ | |
11123 | if (last_text_row) | |
11124 | { | |
11125 | w->window_end_bytepos | |
11126 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11127 | w->window_end_pos |
11128 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11129 | w->window_end_vpos | |
11130 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11131 | } |
11132 | else | |
a2889657 | 11133 | { |
ac90c44f GM |
11134 | w->window_end_vpos |
11135 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 11136 | } |
5f5c8ee5 GM |
11137 | |
11138 | w->window_end_valid = Qnil; | |
11139 | w->desired_matrix->no_scrolling_p = 1; | |
11140 | ||
11141 | #if GLYPH_DEBUG | |
11142 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
11143 | #endif | |
11144 | return 1; | |
a2889657 | 11145 | } |
5f5c8ee5 GM |
11146 | |
11147 | return 0; | |
11148 | } | |
a2889657 | 11149 | |
a2889657 | 11150 | |
5f5c8ee5 GM |
11151 | \f |
11152 | /************************************************************************ | |
11153 | Window redisplay reusing current matrix when buffer has changed | |
11154 | ************************************************************************/ | |
11155 | ||
1ec185cb GM |
11156 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
11157 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
11158 | int *, int *)); |
11159 | static struct glyph_row * | |
11160 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
11161 | struct glyph_row *)); | |
11162 | ||
11163 | ||
11164 | /* Return the last row in MATRIX displaying text. If row START is | |
11165 | non-null, start searching with that row. IT gives the dimensions | |
11166 | of the display. Value is null if matrix is empty; otherwise it is | |
11167 | a pointer to the row found. */ | |
11168 | ||
11169 | static struct glyph_row * | |
11170 | find_last_row_displaying_text (matrix, it, start) | |
11171 | struct glyph_matrix *matrix; | |
11172 | struct it *it; | |
11173 | struct glyph_row *start; | |
11174 | { | |
11175 | struct glyph_row *row, *row_found; | |
11176 | ||
11177 | /* Set row_found to the last row in IT->w's current matrix | |
11178 | displaying text. The loop looks funny but think of partially | |
11179 | visible lines. */ | |
11180 | row_found = NULL; | |
11181 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
11182 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11183 | { | |
11184 | xassert (row->enabled_p); | |
11185 | row_found = row; | |
11186 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
11187 | break; | |
11188 | ++row; | |
a2889657 | 11189 | } |
5f5c8ee5 GM |
11190 | |
11191 | return row_found; | |
11192 | } | |
11193 | ||
a2889657 | 11194 | |
5f5c8ee5 | 11195 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
11196 | by changes at the start of current_buffer that occurred since W's |
11197 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 11198 | |
d43fbe9d GM |
11199 | BEG_UNCHANGED us the number of characters unchanged at the start of |
11200 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
11201 | first changed character in current_buffer. Characters at positions < | |
11202 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
11203 | when the current matrix was built. */ | |
5f5c8ee5 GM |
11204 | |
11205 | static struct glyph_row * | |
1ec185cb | 11206 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
11207 | struct window *w; |
11208 | { | |
9142dd5b | 11209 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
11210 | struct glyph_row *row; |
11211 | struct glyph_row *row_found = NULL; | |
11212 | int yb = window_text_bottom_y (w); | |
11213 | ||
11214 | /* Find the last row displaying unchanged text. */ | |
11215 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11216 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
11217 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 11218 | { |
5f5c8ee5 GM |
11219 | if (/* If row ends before first_changed_pos, it is unchanged, |
11220 | except in some case. */ | |
11221 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
11222 | /* When row ends in ZV and we write at ZV it is not | |
11223 | unchanged. */ | |
11224 | && !row->ends_at_zv_p | |
11225 | /* When first_changed_pos is the end of a continued line, | |
11226 | row is not unchanged because it may be no longer | |
11227 | continued. */ | |
11228 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
11229 | && row->continued_p)) | |
11230 | row_found = row; | |
11231 | ||
11232 | /* Stop if last visible row. */ | |
11233 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
11234 | break; | |
11235 | ||
11236 | ++row; | |
a2889657 JB |
11237 | } |
11238 | ||
5f5c8ee5 | 11239 | return row_found; |
a2889657 | 11240 | } |
5f5c8ee5 GM |
11241 | |
11242 | ||
11243 | /* Find the first glyph row in the current matrix of W that is not | |
d43fbe9d GM |
11244 | affected by changes at the end of current_buffer since the |
11245 | time W's current matrix was built. | |
11246 | ||
11247 | Return in *DELTA the number of chars by which buffer positions in | |
11248 | unchanged text at the end of current_buffer must be adjusted. | |
11249 | ||
11250 | Return in *DELTA_BYTES the corresponding number of bytes. | |
11251 | ||
11252 | Value is null if no such row exists, i.e. all rows are affected by | |
11253 | changes. */ | |
5f5c8ee5 GM |
11254 | |
11255 | static struct glyph_row * | |
1ec185cb | 11256 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
11257 | struct window *w; |
11258 | int *delta, *delta_bytes; | |
a2889657 | 11259 | { |
5f5c8ee5 GM |
11260 | struct glyph_row *row; |
11261 | struct glyph_row *row_found = NULL; | |
c581d710 | 11262 | |
5f5c8ee5 | 11263 | *delta = *delta_bytes = 0; |
b2a76982 | 11264 | |
1ec185cb GM |
11265 | /* Display must not have been paused, otherwise the current matrix |
11266 | is not up to date. */ | |
11267 | if (NILP (w->window_end_valid)) | |
11268 | abort (); | |
11269 | ||
11270 | /* A value of window_end_pos >= END_UNCHANGED means that the window | |
5f5c8ee5 GM |
11271 | end is in the range of changed text. If so, there is no |
11272 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 11273 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
11274 | return NULL; |
11275 | ||
11276 | /* Set row to the last row in W's current matrix displaying text. */ | |
11277 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
11278 | ||
5f5c8ee5 GM |
11279 | /* If matrix is entirely empty, no unchanged row exists. */ |
11280 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11281 | { | |
11282 | /* The value of row is the last glyph row in the matrix having a | |
11283 | meaningful buffer position in it. The end position of row | |
11284 | corresponds to window_end_pos. This allows us to translate | |
11285 | buffer positions in the current matrix to current buffer | |
11286 | positions for characters not in changed text. */ | |
11287 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11288 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11289 | int last_unchanged_pos, last_unchanged_pos_old; | |
11290 | struct glyph_row *first_text_row | |
11291 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11292 | ||
11293 | *delta = Z - Z_old; | |
11294 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
11295 | ||
11296 | /* Set last_unchanged_pos to the buffer position of the last | |
11297 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
11298 | index + 1 of the last character in current_buffer, i.e. by |
11299 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
11300 | unchanged character, and we have to add BEG to get its buffer |
11301 | position. */ | |
9142dd5b | 11302 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
11303 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
11304 | ||
11305 | /* Search backward from ROW for a row displaying a line that | |
11306 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 11307 | for (; row > first_text_row; --row) |
5f5c8ee5 | 11308 | { |
1ec185cb GM |
11309 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11310 | abort (); | |
5f5c8ee5 GM |
11311 | |
11312 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
11313 | row_found = row; | |
5f5c8ee5 GM |
11314 | } |
11315 | } | |
11316 | ||
1ec185cb GM |
11317 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
11318 | abort (); | |
11319 | ||
5f5c8ee5 | 11320 | return row_found; |
c581d710 RS |
11321 | } |
11322 | ||
c581d710 | 11323 | |
5f5c8ee5 GM |
11324 | /* Make sure that glyph rows in the current matrix of window W |
11325 | reference the same glyph memory as corresponding rows in the | |
11326 | frame's frame matrix. This function is called after scrolling W's | |
11327 | current matrix on a terminal frame in try_window_id and | |
11328 | try_window_reusing_current_matrix. */ | |
11329 | ||
11330 | static void | |
11331 | sync_frame_with_window_matrix_rows (w) | |
11332 | struct window *w; | |
c581d710 | 11333 | { |
5f5c8ee5 GM |
11334 | struct frame *f = XFRAME (w->frame); |
11335 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
11336 | ||
11337 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
11338 | must have a frame matrix. */ | |
11339 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
11340 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
11341 | xassert (!FRAME_WINDOW_P (f)); | |
11342 | ||
11343 | /* If W is a full-width window, glyph pointers in W's current matrix | |
11344 | have, by definition, to be the same as glyph pointers in the | |
7d4cc828 GM |
11345 | corresponding frame matrix. Note that frame matrices have no |
11346 | marginal areas (see build_frame_matrix). */ | |
5f5c8ee5 GM |
11347 | window_row = w->current_matrix->rows; |
11348 | window_row_end = window_row + w->current_matrix->nrows; | |
11349 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
11350 | while (window_row < window_row_end) | |
659a218f | 11351 | { |
7d4cc828 GM |
11352 | struct glyph *start = window_row->glyphs[LEFT_MARGIN_AREA]; |
11353 | struct glyph *end = window_row->glyphs[LAST_AREA]; | |
11354 | ||
11355 | frame_row->glyphs[LEFT_MARGIN_AREA] = start; | |
11356 | frame_row->glyphs[TEXT_AREA] = start; | |
11357 | frame_row->glyphs[RIGHT_MARGIN_AREA] = end; | |
11358 | frame_row->glyphs[LAST_AREA] = end; | |
f002db93 GM |
11359 | |
11360 | /* Disable frame rows whose corresponding window rows have | |
11361 | been disabled in try_window_id. */ | |
11362 | if (!window_row->enabled_p) | |
11363 | frame_row->enabled_p = 0; | |
11364 | ||
5f5c8ee5 | 11365 | ++window_row, ++frame_row; |
659a218f | 11366 | } |
a2889657 | 11367 | } |
5f5c8ee5 GM |
11368 | |
11369 | ||
e037b9ec GM |
11370 | /* Find the glyph row in window W containing CHARPOS. Consider all |
11371 | rows between START and END (not inclusive). END null means search | |
11372 | all rows to the end of the display area of W. Value is the row | |
11373 | containing CHARPOS or null. */ | |
11374 | ||
0bef35bc | 11375 | struct glyph_row * |
0df56f4d | 11376 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
11377 | struct window *w; |
11378 | int charpos; | |
11379 | struct glyph_row *start, *end; | |
0df56f4d | 11380 | int dy; |
e037b9ec GM |
11381 | { |
11382 | struct glyph_row *row = start; | |
11383 | int last_y; | |
11384 | ||
11385 | /* If we happen to start on a header-line, skip that. */ | |
11386 | if (row->mode_line_p) | |
11387 | ++row; | |
11388 | ||
11389 | if ((end && row >= end) || !row->enabled_p) | |
11390 | return NULL; | |
11391 | ||
0df56f4d | 11392 | last_y = window_text_bottom_y (w) - dy; |
e037b9ec GM |
11393 | |
11394 | while ((end == NULL || row < end) | |
0df56f4d | 11395 | && MATRIX_ROW_BOTTOM_Y (row) < last_y |
e037b9ec | 11396 | && (MATRIX_ROW_END_CHARPOS (row) < charpos |
e037b9ec | 11397 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
11398 | /* The end position of a row equals the start |
11399 | position of the next row. If CHARPOS is there, we | |
11400 | would rather display it in the next line, except | |
11401 | when this line ends in ZV. */ | |
11402 | && !row->ends_at_zv_p | |
11403 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)))) | |
e037b9ec GM |
11404 | ++row; |
11405 | ||
11406 | /* Give up if CHARPOS not found. */ | |
11407 | if ((end && row >= end) | |
11408 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
11409 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
11410 | row = NULL; | |
11411 | ||
11412 | return row; | |
11413 | } | |
11414 | ||
11415 | ||
5f5c8ee5 GM |
11416 | /* Try to redisplay window W by reusing its existing display. W's |
11417 | current matrix must be up to date when this function is called, | |
11418 | i.e. window_end_valid must not be nil. | |
11419 | ||
11420 | Value is | |
11421 | ||
11422 | 1 if display has been updated | |
11423 | 0 if otherwise unsuccessful | |
11424 | -1 if redisplay with same window start is known not to succeed | |
11425 | ||
11426 | The following steps are performed: | |
11427 | ||
11428 | 1. Find the last row in the current matrix of W that is not | |
11429 | affected by changes at the start of current_buffer. If no such row | |
11430 | is found, give up. | |
11431 | ||
11432 | 2. Find the first row in W's current matrix that is not affected by | |
11433 | changes at the end of current_buffer. Maybe there is no such row. | |
11434 | ||
11435 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
11436 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
11437 | the window. | |
11438 | ||
11439 | 4. If cursor is not known to appear on the window, give up. | |
11440 | ||
11441 | 5. If display stopped at the row found in step 2, scroll the | |
11442 | display and current matrix as needed. | |
11443 | ||
11444 | 6. Maybe display some lines at the end of W, if we must. This can | |
11445 | happen under various circumstances, like a partially visible line | |
11446 | becoming fully visible, or because newly displayed lines are displayed | |
11447 | in smaller font sizes. | |
11448 | ||
11449 | 7. Update W's window end information. */ | |
11450 | ||
12adba34 | 11451 | static int |
5f5c8ee5 | 11452 | try_window_id (w) |
12adba34 | 11453 | struct window *w; |
12adba34 | 11454 | { |
5f5c8ee5 GM |
11455 | struct frame *f = XFRAME (w->frame); |
11456 | struct glyph_matrix *current_matrix = w->current_matrix; | |
11457 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
11458 | struct glyph_row *last_unchanged_at_beg_row; | |
11459 | struct glyph_row *first_unchanged_at_end_row; | |
11460 | struct glyph_row *row; | |
11461 | struct glyph_row *bottom_row; | |
11462 | int bottom_vpos; | |
11463 | struct it it; | |
11464 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
11465 | struct text_pos start_pos; | |
11466 | struct run run; | |
11467 | int first_unchanged_at_end_vpos = 0; | |
11468 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
11469 | struct text_pos start; | |
27d16f05 | 11470 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 11471 | |
69d1f7c9 | 11472 | #if GLYPH_DEBUG |
76cb5e06 GM |
11473 | if (inhibit_try_window_id) |
11474 | return 0; | |
11475 | #endif | |
11476 | ||
27d16f05 GM |
11477 | /* This is handy for debugging. */ |
11478 | #if 0 | |
11479 | #define GIVE_UP(X) \ | |
11480 | do { \ | |
11481 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
11482 | return 0; \ | |
11483 | } while (0) | |
11484 | #else | |
62397849 | 11485 | #define GIVE_UP(X) return 0 |
27d16f05 GM |
11486 | #endif |
11487 | ||
5f5c8ee5 GM |
11488 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
11489 | ||
27d16f05 GM |
11490 | /* Don't use this for mini-windows because these can show |
11491 | messages and mini-buffers, and we don't handle that here. */ | |
11492 | if (MINI_WINDOW_P (w)) | |
11493 | GIVE_UP (1); | |
11494 | ||
11495 | /* This flag is used to prevent redisplay optimizations. */ | |
5fb96e96 | 11496 | if (windows_or_buffers_changed || cursor_type_changed) |
27d16f05 GM |
11497 | GIVE_UP (2); |
11498 | ||
f5376658 | 11499 | /* Verify that narrowing has not changed. This flag is also set to prevent |
27d16f05 GM |
11500 | redisplay optimizations. It would be nice to further |
11501 | reduce the number of cases where this prevents try_window_id. */ | |
11502 | if (current_buffer->clip_changed) | |
11503 | GIVE_UP (3); | |
11504 | ||
11505 | /* Window must either use window-based redisplay or be full width. */ | |
11506 | if (!FRAME_WINDOW_P (f) | |
11507 | && (!line_ins_del_ok | |
11508 | || !WINDOW_FULL_WIDTH_P (w))) | |
11509 | GIVE_UP (4); | |
5f5c8ee5 | 11510 | |
f5376658 | 11511 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
11512 | if (PT < CHARPOS (start)) |
11513 | GIVE_UP (5); | |
11514 | ||
11515 | /* Another way to prevent redisplay optimizations. */ | |
11516 | if (XFASTINT (w->last_modified) == 0) | |
11517 | GIVE_UP (6); | |
11518 | ||
f5376658 | 11519 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
11520 | if (XFASTINT (w->hscroll) != 0) |
11521 | GIVE_UP (7); | |
11522 | ||
f5376658 | 11523 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
11524 | if (NILP (w->window_end_valid)) |
11525 | GIVE_UP (8); | |
11526 | ||
11527 | /* Can't use this if highlighting a region because a cursor movement | |
11528 | will do more than just set the cursor. */ | |
11529 | if (!NILP (Vtransient_mark_mode) | |
11530 | && !NILP (current_buffer->mark_active)) | |
11531 | GIVE_UP (9); | |
11532 | ||
11533 | /* Likewise if highlighting trailing whitespace. */ | |
11534 | if (!NILP (Vshow_trailing_whitespace)) | |
11535 | GIVE_UP (11); | |
11536 | ||
11537 | /* Likewise if showing a region. */ | |
11538 | if (!NILP (w->region_showing)) | |
11539 | GIVE_UP (10); | |
11540 | ||
11541 | /* Can use this if overlay arrow position and or string have changed. */ | |
11542 | if (!EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) | |
11543 | || !EQ (last_arrow_string, Voverlay_arrow_string)) | |
11544 | GIVE_UP (12); | |
11545 | ||
11546 | ||
5f5c8ee5 GM |
11547 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
11548 | only if buffer has really changed. The reason is that the gap is | |
11549 | initially at Z for freshly visited files. The code below would | |
11550 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
11551 | if (MODIFF > SAVE_MODIFF |
11552 | /* This seems to happen sometimes after saving a buffer. */ | |
11553 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 11554 | { |
9142dd5b GM |
11555 | if (GPT - BEG < BEG_UNCHANGED) |
11556 | BEG_UNCHANGED = GPT - BEG; | |
11557 | if (Z - GPT < END_UNCHANGED) | |
11558 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 11559 | } |
bf9249e3 | 11560 | |
27d16f05 GM |
11561 | /* The position of the first and last character that has been changed. */ |
11562 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
11563 | last_changed_charpos = Z - END_UNCHANGED; | |
11564 | ||
5f5c8ee5 GM |
11565 | /* If window starts after a line end, and the last change is in |
11566 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
11567 | This case happens with stealth-fontification. Note that although |
11568 | the display is unchanged, glyph positions in the matrix have to | |
11569 | be adjusted, of course. */ | |
5f5c8ee5 | 11570 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 11571 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 11572 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 11573 | && CHARPOS (start) == BEGV) |
e60f4527 | 11574 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
11575 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
11576 | { | |
11577 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
11578 | struct glyph_row *r0; | |
11579 | ||
11580 | /* Compute how many chars/bytes have been added to or removed | |
11581 | from the buffer. */ | |
11582 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11583 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11584 | delta = Z - Z_old; | |
11585 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
11586 | ||
11587 | /* Give up if PT is not in the window. Note that it already has | |
11588 | been checked at the start of try_window_id that PT is not in | |
11589 | front of the window start. */ | |
11590 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
11591 | GIVE_UP (13); | |
11592 | ||
11593 | /* If window start is unchanged, we can reuse the whole matrix | |
11594 | as is, after adjusting glyph positions. No need to compute | |
11595 | the window end again, since its offset from Z hasn't changed. */ | |
11596 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11597 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
11598 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes) | |
11599 | { | |
11600 | /* Adjust positions in the glyph matrix. */ | |
11601 | if (delta || delta_bytes) | |
11602 | { | |
11603 | struct glyph_row *r1 | |
11604 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11605 | increment_matrix_positions (w->current_matrix, | |
11606 | MATRIX_ROW_VPOS (r0, current_matrix), | |
11607 | MATRIX_ROW_VPOS (r1, current_matrix), | |
11608 | delta, delta_bytes); | |
11609 | } | |
e5959a9a | 11610 | |
27d16f05 | 11611 | /* Set the cursor. */ |
0df56f4d | 11612 | row = row_containing_pos (w, PT, r0, NULL, 0); |
27d16f05 GM |
11613 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); |
11614 | return 1; | |
11615 | } | |
5f5c8ee5 GM |
11616 | } |
11617 | ||
27d16f05 | 11618 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 11619 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
11620 | be taken if ZV is visible in the window, and text has been added |
11621 | there that is visible in the window. */ | |
11622 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
11623 | /* ZV is not visible in the window, or there are no |
11624 | changes at ZV, actually. */ | |
11625 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
11626 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 11627 | { |
27d16f05 | 11628 | struct glyph_row *r0; |
ef121659 | 11629 | |
27d16f05 GM |
11630 | /* Give up if PT is not in the window. Note that it already has |
11631 | been checked at the start of try_window_id that PT is not in | |
11632 | front of the window start. */ | |
11633 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
11634 | GIVE_UP (14); | |
11635 | ||
11636 | /* If window start is unchanged, we can reuse the whole matrix | |
11637 | as is, without changing glyph positions since no text has | |
11638 | been added/removed in front of the window end. */ | |
11639 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11640 | if (TEXT_POS_EQUAL_P (start, r0->start.pos)) | |
11641 | { | |
11642 | /* We have to compute the window end anew since text | |
11643 | can have been added/removed after it. */ | |
11644 | w->window_end_pos | |
11645 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
11646 | w->window_end_bytepos | |
11647 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
11648 | ||
11649 | /* Set the cursor. */ | |
0df56f4d | 11650 | row = row_containing_pos (w, PT, r0, NULL, 0); |
27d16f05 GM |
11651 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); |
11652 | return 2; | |
11653 | } | |
5f5c8ee5 GM |
11654 | } |
11655 | ||
2b9c25e0 GM |
11656 | /* Give up if window start is in the changed area. |
11657 | ||
11658 | The condition used to read | |
11659 | ||
11660 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
11661 | ||
11662 | but why that was tested escapes me at the moment. */ | |
11663 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
11664 | && CHARPOS (start) <= last_changed_charpos) |
11665 | GIVE_UP (15); | |
11666 | ||
f5376658 RS |
11667 | /* Check that window start agrees with the start of the first glyph |
11668 | row in its current matrix. Check this after we know the window | |
11669 | start is not in changed text, otherwise positions would not be | |
11670 | comparable. */ | |
27d16f05 | 11671 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 11672 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 11673 | GIVE_UP (16); |
5f5c8ee5 | 11674 | |
23e8bd86 GM |
11675 | /* Give up if the window ends in strings. Overlay strings |
11676 | at the end are difficult to handle, so don't try. */ | |
11677 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
11678 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
11679 | GIVE_UP (20); | |
11680 | ||
5f5c8ee5 GM |
11681 | /* Compute the position at which we have to start displaying new |
11682 | lines. Some of the lines at the top of the window might be | |
11683 | reusable because they are not displaying changed text. Find the | |
11684 | last row in W's current matrix not affected by changes at the | |
11685 | start of current_buffer. Value is null if changes start in the | |
11686 | first line of window. */ | |
1ec185cb | 11687 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
11688 | if (last_unchanged_at_beg_row) |
11689 | { | |
67f1cf4c GM |
11690 | /* Avoid starting to display in the moddle of a character, a TAB |
11691 | for instance. This is easier than to set up the iterator | |
11692 | exactly, and it's not a frequent case, so the additional | |
11693 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
11694 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
11695 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
11696 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
11697 | --last_unchanged_at_beg_row; | |
11698 | ||
11699 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 11700 | GIVE_UP (17); |
47d57b22 GM |
11701 | |
11702 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
11703 | GIVE_UP (18); | |
5f5c8ee5 GM |
11704 | start_pos = it.current.pos; |
11705 | ||
11706 | /* Start displaying new lines in the desired matrix at the same | |
11707 | vpos we would use in the current matrix, i.e. below | |
11708 | last_unchanged_at_beg_row. */ | |
11709 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
11710 | current_matrix); | |
11711 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
11712 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
11713 | ||
11714 | xassert (it.hpos == 0 && it.current_x == 0); | |
11715 | } | |
11716 | else | |
11717 | { | |
11718 | /* There are no reusable lines at the start of the window. | |
11719 | Start displaying in the first line. */ | |
11720 | start_display (&it, w, start); | |
11721 | start_pos = it.current.pos; | |
11722 | } | |
11723 | ||
5f5c8ee5 GM |
11724 | /* Find the first row that is not affected by changes at the end of |
11725 | the buffer. Value will be null if there is no unchanged row, in | |
11726 | which case we must redisplay to the end of the window. delta | |
11727 | will be set to the value by which buffer positions beginning with | |
11728 | first_unchanged_at_end_row have to be adjusted due to text | |
11729 | changes. */ | |
11730 | first_unchanged_at_end_row | |
1ec185cb | 11731 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
11732 | IF_DEBUG (debug_delta = delta); |
11733 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
11734 | ||
11735 | /* Set stop_pos to the buffer position up to which we will have to | |
11736 | display new lines. If first_unchanged_at_end_row != NULL, this | |
11737 | is the buffer position of the start of the line displayed in that | |
11738 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
11739 | that we don't stop at a buffer position. */ | |
11740 | stop_pos = 0; | |
11741 | if (first_unchanged_at_end_row) | |
11742 | { | |
11743 | xassert (last_unchanged_at_beg_row == NULL | |
11744 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
11745 | ||
11746 | /* If this is a continuation line, move forward to the next one | |
11747 | that isn't. Changes in lines above affect this line. | |
11748 | Caution: this may move first_unchanged_at_end_row to a row | |
11749 | not displaying text. */ | |
11750 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
11751 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
11752 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
11753 | < it.last_visible_y)) | |
11754 | ++first_unchanged_at_end_row; | |
11755 | ||
11756 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
11757 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
11758 | >= it.last_visible_y)) | |
11759 | first_unchanged_at_end_row = NULL; | |
11760 | else | |
11761 | { | |
11762 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
11763 | + delta); | |
11764 | first_unchanged_at_end_vpos | |
11765 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 11766 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
11767 | } |
11768 | } | |
11769 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 11770 | GIVE_UP (19); |
5f5c8ee5 GM |
11771 | |
11772 | ||
11773 | #if GLYPH_DEBUG | |
11774 | ||
11775 | /* Either there is no unchanged row at the end, or the one we have | |
11776 | now displays text. This is a necessary condition for the window | |
11777 | end pos calculation at the end of this function. */ | |
11778 | xassert (first_unchanged_at_end_row == NULL | |
11779 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
11780 | ||
11781 | debug_last_unchanged_at_beg_vpos | |
11782 | = (last_unchanged_at_beg_row | |
11783 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
11784 | : -1); | |
11785 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
11786 | ||
11787 | #endif /* GLYPH_DEBUG != 0 */ | |
11788 | ||
33ea6c4d | 11789 | |
5f5c8ee5 GM |
11790 | /* Display new lines. Set last_text_row to the last new line |
11791 | displayed which has text on it, i.e. might end up as being the | |
11792 | line where the window_end_vpos is. */ | |
11793 | w->cursor.vpos = -1; | |
11794 | last_text_row = NULL; | |
11795 | overlay_arrow_seen = 0; | |
11796 | while (it.current_y < it.last_visible_y | |
11797 | && !fonts_changed_p | |
11798 | && (first_unchanged_at_end_row == NULL | |
11799 | || IT_CHARPOS (it) < stop_pos)) | |
11800 | { | |
11801 | if (display_line (&it)) | |
11802 | last_text_row = it.glyph_row - 1; | |
11803 | } | |
11804 | ||
11805 | if (fonts_changed_p) | |
11806 | return -1; | |
11807 | ||
11808 | ||
11809 | /* Compute differences in buffer positions, y-positions etc. for | |
11810 | lines reused at the bottom of the window. Compute what we can | |
11811 | scroll. */ | |
ca42b2e8 GM |
11812 | if (first_unchanged_at_end_row |
11813 | /* No lines reused because we displayed everything up to the | |
11814 | bottom of the window. */ | |
11815 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
11816 | { |
11817 | dvpos = (it.vpos | |
11818 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
11819 | current_matrix)); | |
11820 | dy = it.current_y - first_unchanged_at_end_row->y; | |
11821 | run.current_y = first_unchanged_at_end_row->y; | |
11822 | run.desired_y = run.current_y + dy; | |
11823 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
11824 | } | |
11825 | else | |
ca42b2e8 GM |
11826 | { |
11827 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
11828 | first_unchanged_at_end_row = NULL; | |
11829 | } | |
5f5c8ee5 GM |
11830 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
11831 | ||
8f8ba186 | 11832 | |
5f5c8ee5 GM |
11833 | /* Find the cursor if not already found. We have to decide whether |
11834 | PT will appear on this window (it sometimes doesn't, but this is | |
11835 | not a very frequent case.) This decision has to be made before | |
11836 | the current matrix is altered. A value of cursor.vpos < 0 means | |
11837 | that PT is either in one of the lines beginning at | |
11838 | first_unchanged_at_end_row or below the window. Don't care for | |
11839 | lines that might be displayed later at the window end; as | |
11840 | mentioned, this is not a frequent case. */ | |
11841 | if (w->cursor.vpos < 0) | |
11842 | { | |
5f5c8ee5 GM |
11843 | /* Cursor in unchanged rows at the top? */ |
11844 | if (PT < CHARPOS (start_pos) | |
11845 | && last_unchanged_at_beg_row) | |
11846 | { | |
e037b9ec GM |
11847 | row = row_containing_pos (w, PT, |
11848 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 11849 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
11850 | if (row) |
11851 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
11852 | } |
11853 | ||
11854 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
11855 | else if (first_unchanged_at_end_row) | |
11856 | { | |
e037b9ec | 11857 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 11858 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 11859 | if (row) |
468155d7 GM |
11860 | set_cursor_from_row (w, row, w->current_matrix, delta, |
11861 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
11862 | } |
11863 | ||
11864 | /* Give up if cursor was not found. */ | |
11865 | if (w->cursor.vpos < 0) | |
11866 | { | |
11867 | clear_glyph_matrix (w->desired_matrix); | |
11868 | return -1; | |
11869 | } | |
11870 | } | |
11871 | ||
11872 | /* Don't let the cursor end in the scroll margins. */ | |
11873 | { | |
11874 | int this_scroll_margin, cursor_height; | |
11875 | ||
11876 | this_scroll_margin = max (0, scroll_margin); | |
11877 | this_scroll_margin = min (this_scroll_margin, | |
11878 | XFASTINT (w->height) / 4); | |
11879 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
11880 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
11881 | ||
11882 | if ((w->cursor.y < this_scroll_margin | |
11883 | && CHARPOS (start) > BEGV) | |
11884 | /* Don't take scroll margin into account at the bottom because | |
11885 | old redisplay didn't do it either. */ | |
11886 | || w->cursor.y + cursor_height > it.last_visible_y) | |
11887 | { | |
11888 | w->cursor.vpos = -1; | |
11889 | clear_glyph_matrix (w->desired_matrix); | |
11890 | return -1; | |
11891 | } | |
11892 | } | |
11893 | ||
11894 | /* Scroll the display. Do it before changing the current matrix so | |
11895 | that xterm.c doesn't get confused about where the cursor glyph is | |
11896 | found. */ | |
fa77249f | 11897 | if (dy && run.height) |
5f5c8ee5 GM |
11898 | { |
11899 | update_begin (f); | |
11900 | ||
11901 | if (FRAME_WINDOW_P (f)) | |
11902 | { | |
11903 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11904 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11905 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11906 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11907 | } |
11908 | else | |
11909 | { | |
11910 | /* Terminal frame. In this case, dvpos gives the number of | |
11911 | lines to scroll by; dvpos < 0 means scroll up. */ | |
11912 | int first_unchanged_at_end_vpos | |
11913 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
11914 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
522ed7fb GM |
11915 | int end = (XFASTINT (w->top) |
11916 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) | |
11917 | + window_internal_height (w)); | |
5f5c8ee5 GM |
11918 | |
11919 | /* Perform the operation on the screen. */ | |
11920 | if (dvpos > 0) | |
11921 | { | |
11922 | /* Scroll last_unchanged_at_beg_row to the end of the | |
11923 | window down dvpos lines. */ | |
11924 | set_terminal_window (end); | |
11925 | ||
11926 | /* On dumb terminals delete dvpos lines at the end | |
11927 | before inserting dvpos empty lines. */ | |
11928 | if (!scroll_region_ok) | |
11929 | ins_del_lines (end - dvpos, -dvpos); | |
11930 | ||
11931 | /* Insert dvpos empty lines in front of | |
11932 | last_unchanged_at_beg_row. */ | |
11933 | ins_del_lines (from, dvpos); | |
11934 | } | |
11935 | else if (dvpos < 0) | |
11936 | { | |
11937 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
11938 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
11939 | set_terminal_window (end); | |
11940 | ||
11941 | /* Delete dvpos lines in front of | |
11942 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
11943 | the cursor to the given vpos and emit |dvpos| delete | |
11944 | line sequences. */ | |
11945 | ins_del_lines (from + dvpos, dvpos); | |
11946 | ||
11947 | /* On a dumb terminal insert dvpos empty lines at the | |
11948 | end. */ | |
11949 | if (!scroll_region_ok) | |
11950 | ins_del_lines (end + dvpos, -dvpos); | |
11951 | } | |
11952 | ||
11953 | set_terminal_window (0); | |
11954 | } | |
11955 | ||
11956 | update_end (f); | |
11957 | } | |
11958 | ||
ca42b2e8 GM |
11959 | /* Shift reused rows of the current matrix to the right position. |
11960 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
11961 | text. */ | |
11962 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11963 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
11964 | if (dvpos < 0) |
11965 | { | |
11966 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
11967 | bottom_vpos, dvpos); | |
11968 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
11969 | bottom_vpos, 0); | |
11970 | } | |
11971 | else if (dvpos > 0) | |
11972 | { | |
11973 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
11974 | bottom_vpos, dvpos); | |
11975 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
11976 | first_unchanged_at_end_vpos + dvpos, 0); | |
11977 | } | |
11978 | ||
11979 | /* For frame-based redisplay, make sure that current frame and window | |
11980 | matrix are in sync with respect to glyph memory. */ | |
11981 | if (!FRAME_WINDOW_P (f)) | |
11982 | sync_frame_with_window_matrix_rows (w); | |
11983 | ||
11984 | /* Adjust buffer positions in reused rows. */ | |
11985 | if (delta) | |
f2d86d7a GM |
11986 | increment_matrix_positions (current_matrix, |
11987 | first_unchanged_at_end_vpos + dvpos, | |
11988 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
11989 | |
11990 | /* Adjust Y positions. */ | |
11991 | if (dy) | |
11992 | shift_glyph_matrix (w, current_matrix, | |
11993 | first_unchanged_at_end_vpos + dvpos, | |
11994 | bottom_vpos, dy); | |
11995 | ||
11996 | if (first_unchanged_at_end_row) | |
11997 | first_unchanged_at_end_row += dvpos; | |
11998 | ||
11999 | /* If scrolling up, there may be some lines to display at the end of | |
12000 | the window. */ | |
12001 | last_text_row_at_end = NULL; | |
12002 | if (dy < 0) | |
12003 | { | |
9c6ba6d1 GM |
12004 | /* Scrolling up can leave for example a partially visible line |
12005 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
12006 | /* Set last_row to the glyph row in the current matrix where the |
12007 | window end line is found. It has been moved up or down in | |
12008 | the matrix by dvpos. */ | |
12009 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
12010 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
12011 | ||
12012 | /* If last_row is the window end line, it should display text. */ | |
12013 | xassert (last_row->displays_text_p); | |
12014 | ||
12015 | /* If window end line was partially visible before, begin | |
12016 | displaying at that line. Otherwise begin displaying with the | |
12017 | line following it. */ | |
12018 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
12019 | { | |
12020 | init_to_row_start (&it, w, last_row); | |
12021 | it.vpos = last_vpos; | |
12022 | it.current_y = last_row->y; | |
12023 | } | |
12024 | else | |
12025 | { | |
12026 | init_to_row_end (&it, w, last_row); | |
12027 | it.vpos = 1 + last_vpos; | |
12028 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
12029 | ++last_row; | |
12030 | } | |
12adba34 | 12031 | |
23e8bd86 GM |
12032 | /* We may start in a continuation line. If so, we have to |
12033 | get the right continuation_lines_width and current_x. */ | |
12034 | it.continuation_lines_width = last_row->continuation_lines_width; | |
12035 | it.hpos = it.current_x = 0; | |
12036 | ||
12037 | /* Display the rest of the lines at the window end. */ | |
12038 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
12039 | while (it.current_y < it.last_visible_y | |
12040 | && !fonts_changed_p) | |
5f5c8ee5 | 12041 | { |
23e8bd86 GM |
12042 | /* Is it always sure that the display agrees with lines in |
12043 | the current matrix? I don't think so, so we mark rows | |
12044 | displayed invalid in the current matrix by setting their | |
12045 | enabled_p flag to zero. */ | |
12046 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
12047 | if (display_line (&it)) | |
12048 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
12049 | } |
12050 | } | |
12adba34 | 12051 | |
5f5c8ee5 GM |
12052 | /* Update window_end_pos and window_end_vpos. */ |
12053 | if (first_unchanged_at_end_row | |
12054 | && first_unchanged_at_end_row->y < it.last_visible_y | |
12055 | && !last_text_row_at_end) | |
12056 | { | |
12057 | /* Window end line if one of the preserved rows from the current | |
12058 | matrix. Set row to the last row displaying text in current | |
12059 | matrix starting at first_unchanged_at_end_row, after | |
12060 | scrolling. */ | |
12061 | xassert (first_unchanged_at_end_row->displays_text_p); | |
12062 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
12063 | first_unchanged_at_end_row); | |
12064 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
12065 | ||
ac90c44f | 12066 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 12067 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
12068 | w->window_end_vpos |
12069 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 12070 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12071 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
12072 | } |
12073 | else if (last_text_row_at_end) | |
12074 | { | |
ac90c44f GM |
12075 | w->window_end_pos |
12076 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
12077 | w->window_end_bytepos |
12078 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
12079 | w->window_end_vpos |
12080 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 12081 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12082 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
12083 | } |
12084 | else if (last_text_row) | |
12085 | { | |
12086 | /* We have displayed either to the end of the window or at the | |
12087 | end of the window, i.e. the last row with text is to be found | |
12088 | in the desired matrix. */ | |
ac90c44f GM |
12089 | w->window_end_pos |
12090 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
12091 | w->window_end_bytepos |
12092 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12093 | w->window_end_vpos |
12094 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 12095 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
12096 | } |
12097 | else if (first_unchanged_at_end_row == NULL | |
12098 | && last_text_row == NULL | |
12099 | && last_text_row_at_end == NULL) | |
12100 | { | |
12101 | /* Displayed to end of window, but no line containing text was | |
12102 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
12103 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
12104 | int vpos = XFASTINT (w->window_end_vpos); | |
12105 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
12106 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
12107 | ||
12108 | for (row = NULL; | |
12109 | row == NULL && vpos >= first_vpos; | |
12110 | --vpos, --current_row, --desired_row) | |
12111 | { | |
12112 | if (desired_row->enabled_p) | |
12113 | { | |
12114 | if (desired_row->displays_text_p) | |
12115 | row = desired_row; | |
12116 | } | |
12117 | else if (current_row->displays_text_p) | |
12118 | row = current_row; | |
12119 | } | |
12adba34 | 12120 | |
0416532f | 12121 | xassert (row != NULL); |
d88a79d4 | 12122 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
12123 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
12124 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 12125 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12126 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
12127 | } |
12128 | else | |
12129 | abort (); | |
ac90c44f | 12130 | |
8cdb267e GM |
12131 | #if 0 /* This leads to problems, for instance when the cursor is |
12132 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
12133 | /* Disable rows below what's displayed in the window. This makes |
12134 | debugging easier. */ | |
12135 | enable_glyph_matrix_rows (current_matrix, | |
12136 | XFASTINT (w->window_end_vpos) + 1, | |
12137 | bottom_vpos, 0); | |
8cdb267e | 12138 | #endif |
23e8bd86 | 12139 | |
5f5c8ee5 GM |
12140 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
12141 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 12142 | |
5f5c8ee5 GM |
12143 | /* Record that display has not been completed. */ |
12144 | w->window_end_valid = Qnil; | |
12145 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 12146 | return 3; |
27d16f05 GM |
12147 | |
12148 | #undef GIVE_UP | |
12adba34 | 12149 | } |
0f9c0ff0 | 12150 | |
a2889657 | 12151 | |
5f5c8ee5 GM |
12152 | \f |
12153 | /*********************************************************************** | |
12154 | More debugging support | |
12155 | ***********************************************************************/ | |
a2889657 | 12156 | |
5f5c8ee5 | 12157 | #if GLYPH_DEBUG |
a2889657 | 12158 | |
eaaa65b0 | 12159 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 12160 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 12161 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 12162 | |
31b24551 | 12163 | |
9ab436b9 | 12164 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 12165 | |
9ab436b9 GM |
12166 | GLYPHS 0 means don't show glyph contents. |
12167 | GLYPHS 1 means show glyphs in short form | |
12168 | GLYPHS > 1 means show glyphs in long form. */ | |
12169 | ||
12170 | void | |
12171 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 12172 | struct glyph_matrix *matrix; |
9ab436b9 | 12173 | int glyphs; |
5f5c8ee5 | 12174 | { |
efc63ef0 | 12175 | int i; |
5f5c8ee5 | 12176 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 12177 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 12178 | } |
31b24551 | 12179 | |
68a37fa8 | 12180 | |
e187cf71 GM |
12181 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
12182 | the glyph row and area where the glyph comes from. */ | |
12183 | ||
12184 | void | |
12185 | dump_glyph (row, glyph, area) | |
12186 | struct glyph_row *row; | |
12187 | struct glyph *glyph; | |
12188 | int area; | |
12189 | { | |
12190 | if (glyph->type == CHAR_GLYPH) | |
12191 | { | |
12192 | fprintf (stderr, | |
12193 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12194 | glyph - row->glyphs[TEXT_AREA], | |
12195 | 'C', | |
12196 | glyph->charpos, | |
12197 | (BUFFERP (glyph->object) | |
12198 | ? 'B' | |
12199 | : (STRINGP (glyph->object) | |
12200 | ? 'S' | |
12201 | : '-')), | |
12202 | glyph->pixel_width, | |
12203 | glyph->u.ch, | |
12204 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
12205 | ? glyph->u.ch | |
12206 | : '.'), | |
12207 | glyph->face_id, | |
12208 | glyph->left_box_line_p, | |
12209 | glyph->right_box_line_p); | |
12210 | } | |
12211 | else if (glyph->type == STRETCH_GLYPH) | |
12212 | { | |
12213 | fprintf (stderr, | |
12214 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12215 | glyph - row->glyphs[TEXT_AREA], | |
12216 | 'S', | |
12217 | glyph->charpos, | |
12218 | (BUFFERP (glyph->object) | |
12219 | ? 'B' | |
12220 | : (STRINGP (glyph->object) | |
12221 | ? 'S' | |
12222 | : '-')), | |
12223 | glyph->pixel_width, | |
12224 | 0, | |
12225 | '.', | |
12226 | glyph->face_id, | |
12227 | glyph->left_box_line_p, | |
12228 | glyph->right_box_line_p); | |
12229 | } | |
12230 | else if (glyph->type == IMAGE_GLYPH) | |
12231 | { | |
12232 | fprintf (stderr, | |
12233 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12234 | glyph - row->glyphs[TEXT_AREA], | |
12235 | 'I', | |
12236 | glyph->charpos, | |
12237 | (BUFFERP (glyph->object) | |
12238 | ? 'B' | |
12239 | : (STRINGP (glyph->object) | |
12240 | ? 'S' | |
12241 | : '-')), | |
12242 | glyph->pixel_width, | |
12243 | glyph->u.img_id, | |
12244 | '.', | |
12245 | glyph->face_id, | |
12246 | glyph->left_box_line_p, | |
12247 | glyph->right_box_line_p); | |
12248 | } | |
12249 | } | |
12250 | ||
12251 | ||
5f5c8ee5 | 12252 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
12253 | GLYPHS 0 means don't show glyph contents. |
12254 | GLYPHS 1 means show glyphs in short form | |
12255 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 12256 | |
5f5c8ee5 | 12257 | void |
eaaa65b0 GM |
12258 | dump_glyph_row (row, vpos, glyphs) |
12259 | struct glyph_row *row; | |
9ab436b9 | 12260 | int vpos, glyphs; |
5f5c8ee5 | 12261 | { |
9ab436b9 GM |
12262 | if (glyphs != 1) |
12263 | { | |
b94c0d9c | 12264 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n"); |
9ab436b9 | 12265 | fprintf (stderr, "=======================================================================\n"); |
5f5c8ee5 | 12266 | |
0ad38729 | 12267 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 12268 | %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 | 12269 | vpos, |
9ab436b9 GM |
12270 | MATRIX_ROW_START_CHARPOS (row), |
12271 | MATRIX_ROW_END_CHARPOS (row), | |
12272 | row->used[TEXT_AREA], | |
12273 | row->contains_overlapping_glyphs_p, | |
12274 | row->enabled_p, | |
9ab436b9 GM |
12275 | row->truncated_on_left_p, |
12276 | row->truncated_on_right_p, | |
12277 | row->overlay_arrow_p, | |
12278 | row->continued_p, | |
12279 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
12280 | row->displays_text_p, | |
12281 | row->ends_at_zv_p, | |
12282 | row->fill_line_p, | |
12283 | row->ends_in_middle_of_char_p, | |
12284 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 12285 | row->mouse_face_p, |
9ab436b9 GM |
12286 | row->x, |
12287 | row->y, | |
12288 | row->pixel_width, | |
12289 | row->height, | |
12290 | row->visible_height, | |
12291 | row->ascent, | |
12292 | row->phys_ascent); | |
33ea6c4d GM |
12293 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
12294 | row->end.overlay_string_index, | |
12295 | row->continuation_lines_width); | |
9ab436b9 GM |
12296 | fprintf (stderr, "%9d %5d\n", |
12297 | CHARPOS (row->start.string_pos), | |
12298 | CHARPOS (row->end.string_pos)); | |
12299 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
12300 | row->end.dpvec_index); | |
12301 | } | |
5f5c8ee5 | 12302 | |
9ab436b9 | 12303 | if (glyphs > 1) |
bd66d1ba | 12304 | { |
e187cf71 GM |
12305 | int area; |
12306 | ||
12307 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12308 | { | |
091f8878 GM |
12309 | struct glyph *glyph = row->glyphs[area]; |
12310 | struct glyph *glyph_end = glyph + row->used[area]; | |
5f5c8ee5 | 12311 | |
e187cf71 | 12312 | /* Glyph for a line end in text. */ |
091f8878 | 12313 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 12314 | ++glyph_end; |
5f5c8ee5 | 12315 | |
e187cf71 GM |
12316 | if (glyph < glyph_end) |
12317 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
5f5c8ee5 | 12318 | |
e187cf71 GM |
12319 | for (; glyph < glyph_end; ++glyph) |
12320 | dump_glyph (row, glyph, area); | |
f7b4b63a | 12321 | } |
f4faa47c | 12322 | } |
9ab436b9 GM |
12323 | else if (glyphs == 1) |
12324 | { | |
e187cf71 | 12325 | int area; |
9ab436b9 | 12326 | |
e187cf71 | 12327 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 12328 | { |
e187cf71 GM |
12329 | char *s = (char *) alloca (row->used[area] + 1); |
12330 | int i; | |
12331 | ||
12332 | for (i = 0; i < row->used[area]; ++i) | |
12333 | { | |
12334 | struct glyph *glyph = row->glyphs[area] + i; | |
12335 | if (glyph->type == CHAR_GLYPH | |
12336 | && glyph->u.ch < 0x80 | |
12337 | && glyph->u.ch >= ' ') | |
12338 | s[i] = glyph->u.ch; | |
12339 | else | |
12340 | s[i] = '.'; | |
12341 | } | |
9ab436b9 | 12342 | |
e187cf71 GM |
12343 | s[i] = '\0'; |
12344 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
12345 | } | |
9ab436b9 | 12346 | } |
5f5c8ee5 | 12347 | } |
f4faa47c | 12348 | |
a2889657 | 12349 | |
5f5c8ee5 GM |
12350 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
12351 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 12352 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
12353 | Shows contents of glyph row structures. With non-nil |
12354 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
12355 | glyphs in short form, otherwise show glyphs in long form. */) |
12356 | (glyphs) | |
9ab436b9 | 12357 | Lisp_Object glyphs; |
5f5c8ee5 GM |
12358 | { |
12359 | struct window *w = XWINDOW (selected_window); | |
12360 | struct buffer *buffer = XBUFFER (w->buffer); | |
12361 | ||
12362 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
12363 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
12364 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
12365 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
12366 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
12367 | dump_glyph_matrix (w->current_matrix, |
12368 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
12369 | return Qnil; |
12370 | } | |
1c2250c2 | 12371 | |
1fca3fae | 12372 | |
7d4cc828 GM |
12373 | DEFUN ("dump-frame-glyph-matrix", Fdump_frame_glyph_matrix, |
12374 | Sdump_frame_glyph_matrix, 0, 0, "", doc: /* */) | |
12375 | () | |
12376 | { | |
12377 | struct frame *f = XFRAME (selected_frame); | |
12378 | dump_glyph_matrix (f->current_matrix, 1); | |
12379 | return Qnil; | |
12380 | } | |
12381 | ||
12382 | ||
e9abc296 | 12383 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 12384 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
12385 | GLYPH 0 means don't dump glyphs. |
12386 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12387 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12388 | (row, glyphs) | |
e9abc296 | 12389 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12390 | { |
eaaa65b0 GM |
12391 | struct glyph_matrix *matrix; |
12392 | int vpos; | |
12393 | ||
b7826503 | 12394 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12395 | matrix = XWINDOW (selected_window)->current_matrix; |
12396 | vpos = XINT (row); | |
12397 | if (vpos >= 0 && vpos < matrix->nrows) | |
12398 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
12399 | vpos, | |
12400 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12401 | return Qnil; |
12402 | } | |
1fca3fae | 12403 | |
67481ae5 | 12404 | |
b94c0d9c | 12405 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 12406 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
12407 | GLYPH 0 means don't dump glyphs. |
12408 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12409 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12410 | (row, glyphs) | |
b94c0d9c | 12411 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12412 | { |
886bd6f2 | 12413 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
12414 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
12415 | int vpos; | |
12416 | ||
b7826503 | 12417 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12418 | vpos = XINT (row); |
12419 | if (vpos >= 0 && vpos < m->nrows) | |
12420 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
12421 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12422 | return Qnil; |
12423 | } | |
ca26e1c8 | 12424 | |
0f9c0ff0 | 12425 | |
62397849 | 12426 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
12427 | doc: /* Toggle tracing of redisplay. |
12428 | With ARG, turn tracing on if and only if ARG is positive. */) | |
12429 | (arg) | |
62397849 | 12430 | Lisp_Object arg; |
5f5c8ee5 | 12431 | { |
62397849 GM |
12432 | if (NILP (arg)) |
12433 | trace_redisplay_p = !trace_redisplay_p; | |
12434 | else | |
12435 | { | |
12436 | arg = Fprefix_numeric_value (arg); | |
12437 | trace_redisplay_p = XINT (arg) > 0; | |
12438 | } | |
12439 | ||
5f5c8ee5 GM |
12440 | return Qnil; |
12441 | } | |
bf9249e3 GM |
12442 | |
12443 | ||
f4a374a1 | 12444 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
7ee72033 MB |
12445 | doc: /* Like `format', but print result to stderr. */) |
12446 | (nargs, args) | |
f4a374a1 GM |
12447 | int nargs; |
12448 | Lisp_Object *args; | |
bf9249e3 | 12449 | { |
f4a374a1 | 12450 | Lisp_Object s = Fformat (nargs, args); |
2051c264 | 12451 | fprintf (stderr, "%s", SDATA (s)); |
bf9249e3 GM |
12452 | return Qnil; |
12453 | } | |
5f5c8ee5 GM |
12454 | |
12455 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 12456 | |
ca26e1c8 | 12457 | |
5f5c8ee5 GM |
12458 | \f |
12459 | /*********************************************************************** | |
12460 | Building Desired Matrix Rows | |
12461 | ***********************************************************************/ | |
a2889657 | 12462 | |
5f5c8ee5 GM |
12463 | /* Return a temporary glyph row holding the glyphs of an overlay |
12464 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 12465 | |
5f5c8ee5 GM |
12466 | static struct glyph_row * |
12467 | get_overlay_arrow_glyph_row (w) | |
12468 | struct window *w; | |
12469 | { | |
12470 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
12471 | struct buffer *buffer = XBUFFER (w->buffer); | |
12472 | struct buffer *old = current_buffer; | |
2051c264 GM |
12473 | unsigned char *arrow_string = SDATA (Voverlay_arrow_string); |
12474 | int arrow_len = SCHARS (Voverlay_arrow_string); | |
5f5c8ee5 GM |
12475 | unsigned char *arrow_end = arrow_string + arrow_len; |
12476 | unsigned char *p; | |
12477 | struct it it; | |
12478 | int multibyte_p; | |
12479 | int n_glyphs_before; | |
12480 | ||
12481 | set_buffer_temp (buffer); | |
12482 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
12483 | it.glyph_row->used[TEXT_AREA] = 0; | |
12484 | SET_TEXT_POS (it.position, 0, 0); | |
12485 | ||
12486 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
12487 | p = arrow_string; | |
12488 | while (p < arrow_end) | |
12489 | { | |
12490 | Lisp_Object face, ilisp; | |
12491 | ||
12492 | /* Get the next character. */ | |
12493 | if (multibyte_p) | |
4fdb80f2 | 12494 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
12495 | else |
12496 | it.c = *p, it.len = 1; | |
12497 | p += it.len; | |
12498 | ||
12499 | /* Get its face. */ | |
ac90c44f | 12500 | ilisp = make_number (p - arrow_string); |
5f5c8ee5 GM |
12501 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
12502 | it.face_id = compute_char_face (f, it.c, face); | |
12503 | ||
12504 | /* Compute its width, get its glyphs. */ | |
12505 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 12506 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
12507 | PRODUCE_GLYPHS (&it); |
12508 | ||
12509 | /* If this character doesn't fit any more in the line, we have | |
12510 | to remove some glyphs. */ | |
12511 | if (it.current_x > it.last_visible_x) | |
12512 | { | |
12513 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
12514 | break; | |
12515 | } | |
12516 | } | |
12517 | ||
12518 | set_buffer_temp (old); | |
12519 | return it.glyph_row; | |
12520 | } | |
ca26e1c8 | 12521 | |
b0a0fbda | 12522 | |
5f5c8ee5 GM |
12523 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
12524 | glyphs are only inserted for terminal frames since we can't really | |
12525 | win with truncation glyphs when partially visible glyphs are | |
12526 | involved. Which glyphs to insert is determined by | |
12527 | produce_special_glyphs. */ | |
67481ae5 | 12528 | |
5f5c8ee5 GM |
12529 | static void |
12530 | insert_left_trunc_glyphs (it) | |
12531 | struct it *it; | |
12532 | { | |
12533 | struct it truncate_it; | |
12534 | struct glyph *from, *end, *to, *toend; | |
12535 | ||
12536 | xassert (!FRAME_WINDOW_P (it->f)); | |
12537 | ||
12538 | /* Get the truncation glyphs. */ | |
12539 | truncate_it = *it; | |
5f5c8ee5 GM |
12540 | truncate_it.current_x = 0; |
12541 | truncate_it.face_id = DEFAULT_FACE_ID; | |
12542 | truncate_it.glyph_row = &scratch_glyph_row; | |
12543 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
12544 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 12545 | truncate_it.object = make_number (0); |
5f5c8ee5 GM |
12546 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
12547 | ||
12548 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
12549 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12550 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
12551 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
12552 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
12553 | ||
12554 | while (from < end) | |
12555 | *to++ = *from++; | |
12556 | ||
37be86f2 KH |
12557 | /* There may be padding glyphs left over. Overwrite them too. */ |
12558 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
12559 | { | |
12560 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12561 | while (from < end) | |
12562 | *to++ = *from++; | |
12563 | } | |
5f5c8ee5 | 12564 | |
37be86f2 KH |
12565 | if (to > toend) |
12566 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 12567 | } |
e0bfbde6 | 12568 | |
e0bfbde6 | 12569 | |
5f5c8ee5 | 12570 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 12571 | |
5f5c8ee5 GM |
12572 | Most of the time, ascent and height of a display line will be equal |
12573 | to the max_ascent and max_height values of the display iterator | |
12574 | structure. This is not the case if | |
67481ae5 | 12575 | |
5f5c8ee5 GM |
12576 | 1. We hit ZV without displaying anything. In this case, max_ascent |
12577 | and max_height will be zero. | |
1c9241f5 | 12578 | |
5f5c8ee5 GM |
12579 | 2. We have some glyphs that don't contribute to the line height. |
12580 | (The glyph row flag contributes_to_line_height_p is for future | |
12581 | pixmap extensions). | |
f6fd109b | 12582 | |
5f5c8ee5 GM |
12583 | The first case is easily covered by using default values because in |
12584 | these cases, the line height does not really matter, except that it | |
12585 | must not be zero. */ | |
67481ae5 | 12586 | |
5f5c8ee5 GM |
12587 | static void |
12588 | compute_line_metrics (it) | |
12589 | struct it *it; | |
12590 | { | |
12591 | struct glyph_row *row = it->glyph_row; | |
12592 | int area, i; | |
1c2250c2 | 12593 | |
5f5c8ee5 GM |
12594 | if (FRAME_WINDOW_P (it->f)) |
12595 | { | |
75c5350a | 12596 | int i, min_y, max_y; |
1c2250c2 | 12597 | |
5f5c8ee5 GM |
12598 | /* The line may consist of one space only, that was added to |
12599 | place the cursor on it. If so, the row's height hasn't been | |
12600 | computed yet. */ | |
12601 | if (row->height == 0) | |
12602 | { | |
12603 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 12604 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
12605 | row->ascent = it->max_ascent; |
12606 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12607 | row->phys_ascent = it->max_phys_ascent; |
12608 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
12609 | } |
12610 | ||
12611 | /* Compute the width of this line. */ | |
12612 | row->pixel_width = row->x; | |
12613 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
12614 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
12615 | ||
12616 | xassert (row->pixel_width >= 0); | |
12617 | xassert (row->ascent >= 0 && row->height > 0); | |
12618 | ||
312246d1 GM |
12619 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
12620 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
12621 | ||
12622 | /* If first line's physical ascent is larger than its logical | |
12623 | ascent, use the physical ascent, and make the row taller. | |
12624 | This makes accented characters fully visible. */ | |
b28cb6ed | 12625 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
12626 | && row->phys_ascent > row->ascent) |
12627 | { | |
12628 | row->height += row->phys_ascent - row->ascent; | |
12629 | row->ascent = row->phys_ascent; | |
12630 | } | |
12631 | ||
5f5c8ee5 GM |
12632 | /* Compute how much of the line is visible. */ |
12633 | row->visible_height = row->height; | |
12634 | ||
75c5350a GM |
12635 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
12636 | max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
12637 | ||
12638 | if (row->y < min_y) | |
12639 | row->visible_height -= min_y - row->y; | |
12640 | if (row->y + row->height > max_y) | |
12641 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
12642 | } |
12643 | else | |
12644 | { | |
12645 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
12646 | if (row->continued_p) |
12647 | row->pixel_width -= it->continuation_pixel_width; | |
12648 | else if (row->truncated_on_right_p) | |
12649 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
12650 | row->ascent = row->phys_ascent = 0; |
12651 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 12652 | } |
67481ae5 | 12653 | |
5f5c8ee5 GM |
12654 | /* Compute a hash code for this row. */ |
12655 | row->hash = 0; | |
12656 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12657 | for (i = 0; i < row->used[area]; ++i) | |
12658 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
12659 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
12660 | + row->glyphs[area][i].face_id |
12661 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 12662 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 12663 | |
5f5c8ee5 | 12664 | it->max_ascent = it->max_descent = 0; |
312246d1 | 12665 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 12666 | } |
12adba34 | 12667 | |
ca26e1c8 | 12668 | |
5f5c8ee5 GM |
12669 | /* Append one space to the glyph row of iterator IT if doing a |
12670 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
12671 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 12672 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
12673 | |
12674 | This function is called to make sure that there is always one glyph | |
12675 | at the end of a glyph row that the cursor can be set on under | |
12676 | window-systems. (If there weren't such a glyph we would not know | |
12677 | how wide and tall a box cursor should be displayed). | |
12678 | ||
12679 | At the same time this space let's a nicely handle clearing to the | |
12680 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 12681 | |
80c6cb1f | 12682 | static int |
5f5c8ee5 GM |
12683 | append_space (it, default_face_p) |
12684 | struct it *it; | |
12685 | int default_face_p; | |
12686 | { | |
12687 | if (FRAME_WINDOW_P (it->f)) | |
12688 | { | |
12689 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 12690 | |
5f5c8ee5 GM |
12691 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
12692 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 12693 | { |
cafafe0b GM |
12694 | /* Save some values that must not be changed. |
12695 | Must save IT->c and IT->len because otherwise | |
12696 | ITERATOR_AT_END_P wouldn't work anymore after | |
12697 | append_space has been called. */ | |
478d746b | 12698 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
12699 | int saved_c = it->c, saved_len = it->len; |
12700 | int saved_x = it->current_x; | |
5f5c8ee5 | 12701 | int saved_face_id = it->face_id; |
cafafe0b | 12702 | struct text_pos saved_pos; |
5f5c8ee5 | 12703 | Lisp_Object saved_object; |
980806b6 | 12704 | struct face *face; |
5f5c8ee5 GM |
12705 | |
12706 | saved_object = it->object; | |
12707 | saved_pos = it->position; | |
12708 | ||
12709 | it->what = IT_CHARACTER; | |
12710 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12711 | it->object = make_number (0); |
5f5c8ee5 GM |
12712 | it->c = ' '; |
12713 | it->len = 1; | |
5f5c8ee5 GM |
12714 | |
12715 | if (default_face_p) | |
12716 | it->face_id = DEFAULT_FACE_ID; | |
4aad61f8 GM |
12717 | else if (it->face_before_selective_p) |
12718 | it->face_id = it->saved_face_id; | |
980806b6 KH |
12719 | face = FACE_FROM_ID (it->f, it->face_id); |
12720 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 12721 | |
5f5c8ee5 GM |
12722 | PRODUCE_GLYPHS (it); |
12723 | ||
12724 | it->current_x = saved_x; | |
12725 | it->object = saved_object; | |
12726 | it->position = saved_pos; | |
12727 | it->what = saved_what; | |
12728 | it->face_id = saved_face_id; | |
cafafe0b GM |
12729 | it->len = saved_len; |
12730 | it->c = saved_c; | |
80c6cb1f | 12731 | return 1; |
5f5c8ee5 GM |
12732 | } |
12733 | } | |
80c6cb1f GM |
12734 | |
12735 | return 0; | |
5f5c8ee5 | 12736 | } |
12adba34 | 12737 | |
1842fc1a | 12738 | |
5f5c8ee5 GM |
12739 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
12740 | to the end of the display line. Called from display_line. | |
12741 | If the glyph row is empty, add a space glyph to it so that we | |
12742 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
12743 | ||
12744 | static void | |
12745 | extend_face_to_end_of_line (it) | |
12746 | struct it *it; | |
12747 | { | |
12748 | struct face *face; | |
12749 | struct frame *f = it->f; | |
1842fc1a | 12750 | |
5f5c8ee5 GM |
12751 | /* If line is already filled, do nothing. */ |
12752 | if (it->current_x >= it->last_visible_x) | |
12753 | return; | |
12754 | ||
12755 | /* Face extension extends the background and box of IT->face_id | |
12756 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
12757 | of the frame, we don't have to do anything. */ |
12758 | if (it->face_before_selective_p) | |
12759 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
12760 | else | |
12761 | face = FACE_FROM_ID (f, it->face_id); | |
12762 | ||
5f5c8ee5 GM |
12763 | if (FRAME_WINDOW_P (f) |
12764 | && face->box == FACE_NO_BOX | |
12765 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
12766 | && !face->stipple) | |
12767 | return; | |
1842fc1a | 12768 | |
5f5c8ee5 GM |
12769 | /* Set the glyph row flag indicating that the face of the last glyph |
12770 | in the text area has to be drawn to the end of the text area. */ | |
12771 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 12772 | |
980806b6 KH |
12773 | /* If current character of IT is not ASCII, make sure we have the |
12774 | ASCII face. This will be automatically undone the next time | |
12775 | get_next_display_element returns a multibyte character. Note | |
12776 | that the character will always be single byte in unibyte text. */ | |
12777 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 12778 | { |
980806b6 | 12779 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 12780 | } |
545e04f6 | 12781 | |
5f5c8ee5 GM |
12782 | if (FRAME_WINDOW_P (f)) |
12783 | { | |
12784 | /* If the row is empty, add a space with the current face of IT, | |
12785 | so that we know which face to draw. */ | |
12786 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 12787 | { |
5f5c8ee5 | 12788 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 12789 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 12790 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 12791 | } |
5f5c8ee5 GM |
12792 | } |
12793 | else | |
12794 | { | |
12795 | /* Save some values that must not be changed. */ | |
12796 | int saved_x = it->current_x; | |
12797 | struct text_pos saved_pos; | |
12798 | Lisp_Object saved_object; | |
478d746b | 12799 | enum display_element_type saved_what = it->what; |
4aad61f8 | 12800 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
12801 | |
12802 | saved_object = it->object; | |
12803 | saved_pos = it->position; | |
12804 | ||
12805 | it->what = IT_CHARACTER; | |
12806 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12807 | it->object = make_number (0); |
5f5c8ee5 GM |
12808 | it->c = ' '; |
12809 | it->len = 1; | |
4aad61f8 | 12810 | it->face_id = face->id; |
5f5c8ee5 GM |
12811 | |
12812 | PRODUCE_GLYPHS (it); | |
12813 | ||
12814 | while (it->current_x <= it->last_visible_x) | |
12815 | PRODUCE_GLYPHS (it); | |
12816 | ||
12817 | /* Don't count these blanks really. It would let us insert a left | |
12818 | truncation glyph below and make us set the cursor on them, maybe. */ | |
12819 | it->current_x = saved_x; | |
12820 | it->object = saved_object; | |
12821 | it->position = saved_pos; | |
12822 | it->what = saved_what; | |
4aad61f8 | 12823 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
12824 | } |
12825 | } | |
12adba34 | 12826 | |
545e04f6 | 12827 | |
5f5c8ee5 GM |
12828 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
12829 | trailing whitespace. */ | |
1c9241f5 | 12830 | |
5f5c8ee5 GM |
12831 | static int |
12832 | trailing_whitespace_p (charpos) | |
12833 | int charpos; | |
12834 | { | |
12835 | int bytepos = CHAR_TO_BYTE (charpos); | |
12836 | int c = 0; | |
7bbe686f | 12837 | |
5f5c8ee5 GM |
12838 | while (bytepos < ZV_BYTE |
12839 | && (c = FETCH_CHAR (bytepos), | |
12840 | c == ' ' || c == '\t')) | |
12841 | ++bytepos; | |
0d09d1e6 | 12842 | |
8f897821 GM |
12843 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
12844 | { | |
12845 | if (bytepos != PT_BYTE) | |
12846 | return 1; | |
12847 | } | |
12848 | return 0; | |
5f5c8ee5 | 12849 | } |
31b24551 | 12850 | |
545e04f6 | 12851 | |
5f5c8ee5 | 12852 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 12853 | |
5f5c8ee5 GM |
12854 | void |
12855 | highlight_trailing_whitespace (f, row) | |
12856 | struct frame *f; | |
12857 | struct glyph_row *row; | |
12858 | { | |
12859 | int used = row->used[TEXT_AREA]; | |
12860 | ||
12861 | if (used) | |
12862 | { | |
12863 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
12864 | struct glyph *glyph = start + used - 1; | |
12865 | ||
ade0bee1 GM |
12866 | /* Skip over glyphs inserted to display the cursor at the |
12867 | end of a line, for extending the face of the last glyph | |
12868 | to the end of the line on terminals, and for truncation | |
12869 | and continuation glyphs. */ | |
65008712 GM |
12870 | while (glyph >= start |
12871 | && glyph->type == CHAR_GLYPH | |
65008712 | 12872 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
12873 | --glyph; |
12874 | ||
12875 | /* If last glyph is a space or stretch, and it's trailing | |
12876 | whitespace, set the face of all trailing whitespace glyphs in | |
12877 | IT->glyph_row to `trailing-whitespace'. */ | |
12878 | if (glyph >= start | |
12879 | && BUFFERP (glyph->object) | |
12880 | && (glyph->type == STRETCH_GLYPH | |
12881 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 12882 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 12883 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 12884 | { |
980806b6 | 12885 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
5f5c8ee5 GM |
12886 | |
12887 | while (glyph >= start | |
12888 | && BUFFERP (glyph->object) | |
12889 | && (glyph->type == STRETCH_GLYPH | |
12890 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
12891 | && glyph->u.ch == ' '))) |
12892 | (glyph--)->face_id = face_id; | |
545e04f6 | 12893 | } |
a2889657 | 12894 | } |
5f5c8ee5 | 12895 | } |
a2889657 | 12896 | |
5fcbb24d | 12897 | |
cafafe0b | 12898 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 12899 | used to hold the cursor. */ |
cafafe0b GM |
12900 | |
12901 | static int | |
12902 | cursor_row_p (w, row) | |
12903 | struct window *w; | |
12904 | struct glyph_row *row; | |
12905 | { | |
9a038881 GM |
12906 | int cursor_row_p = 1; |
12907 | ||
cafafe0b GM |
12908 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
12909 | { | |
9a038881 GM |
12910 | /* If the row ends with a newline from a string, we don't want |
12911 | the cursor there (if the row is continued it doesn't end in a | |
12912 | newline). */ | |
12913 | if (CHARPOS (row->end.string_pos) >= 0 | |
12914 | || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
12915 | cursor_row_p = row->continued_p; | |
12916 | ||
12917 | /* If the row ends at ZV, display the cursor at the end of that | |
12918 | row instead of at the start of the row below. */ | |
12919 | else if (row->ends_at_zv_p) | |
12920 | cursor_row_p = 1; | |
12921 | else | |
12922 | cursor_row_p = 0; | |
cafafe0b GM |
12923 | } |
12924 | ||
9a038881 | 12925 | return cursor_row_p; |
cafafe0b GM |
12926 | } |
12927 | ||
12928 | ||
5f5c8ee5 GM |
12929 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
12930 | IT->w from text at the current position of IT. See dispextern.h | |
12931 | for an overview of struct it. Value is non-zero if | |
12932 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
12933 | only. */ | |
12934 | ||
12935 | static int | |
12936 | display_line (it) | |
12937 | struct it *it; | |
12938 | { | |
12939 | struct glyph_row *row = it->glyph_row; | |
12940 | ||
12941 | /* We always start displaying at hpos zero even if hscrolled. */ | |
12942 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 12943 | |
5f5c8ee5 GM |
12944 | /* We must not display in a row that's not a text row. */ |
12945 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
12946 | < it->w->desired_matrix->nrows); | |
12adba34 | 12947 | |
5f5c8ee5 GM |
12948 | /* Is IT->w showing the region? */ |
12949 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 12950 | |
5f5c8ee5 GM |
12951 | /* Clear the result glyph row and enable it. */ |
12952 | prepare_desired_row (row); | |
12adba34 | 12953 | |
5f5c8ee5 GM |
12954 | row->y = it->current_y; |
12955 | row->start = it->current; | |
12956 | row->continuation_lines_width = it->continuation_lines_width; | |
12957 | row->displays_text_p = 1; | |
91004049 GM |
12958 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
12959 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
12960 | |
12961 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
12962 | display_line on only one line at a time, in which case this | |
12963 | can't really hurt too much, or we call it on lines which appear | |
12964 | one after another in the buffer, in which case all calls to | |
12965 | recenter_overlay_lists but the first will be pretty cheap. */ | |
12966 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
12967 | ||
5f5c8ee5 GM |
12968 | /* Move over display elements that are not visible because we are |
12969 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
12970 | if the first glyph is partially visible or if we hit a line end. */ | |
12971 | if (it->current_x < it->first_visible_x) | |
12972 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
12973 | MOVE_TO_POS | MOVE_TO_X); | |
12974 | ||
12975 | /* Get the initial row height. This is either the height of the | |
12976 | text hscrolled, if there is any, or zero. */ | |
12977 | row->ascent = it->max_ascent; | |
12978 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12979 | row->phys_ascent = it->max_phys_ascent; |
12980 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
12981 | |
12982 | /* Loop generating characters. The loop is left with IT on the next | |
12983 | character to display. */ | |
12984 | while (1) | |
12985 | { | |
12986 | int n_glyphs_before, hpos_before, x_before; | |
12987 | int x, i, nglyphs; | |
ae26e27d | 12988 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 12989 | |
5f5c8ee5 GM |
12990 | /* Retrieve the next thing to display. Value is zero if end of |
12991 | buffer reached. */ | |
12992 | if (!get_next_display_element (it)) | |
12993 | { | |
12994 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
12995 | display the cursor there under X. Set the charpos of the |
12996 | first glyph of blank lines not corresponding to any text | |
12997 | to -1. */ | |
12998 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
12999 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 13000 | { |
5f5c8ee5 GM |
13001 | row->glyphs[TEXT_AREA]->charpos = -1; |
13002 | row->displays_text_p = 0; | |
13003 | ||
2ad551af | 13004 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
13005 | && (!MINI_WINDOW_P (it->w) |
13006 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 13007 | row->indicate_empty_line_p = 1; |
a2889657 | 13008 | } |
5f5c8ee5 GM |
13009 | |
13010 | it->continuation_lines_width = 0; | |
13011 | row->ends_at_zv_p = 1; | |
13012 | break; | |
a2889657 | 13013 | } |
a2889657 | 13014 | |
5f5c8ee5 GM |
13015 | /* Now, get the metrics of what we want to display. This also |
13016 | generates glyphs in `row' (which is IT->glyph_row). */ | |
13017 | n_glyphs_before = row->used[TEXT_AREA]; | |
13018 | x = it->current_x; | |
e6819faf GM |
13019 | |
13020 | /* Remember the line height so far in case the next element doesn't | |
13021 | fit on the line. */ | |
13022 | if (!it->truncate_lines_p) | |
13023 | { | |
13024 | ascent = it->max_ascent; | |
13025 | descent = it->max_descent; | |
13026 | phys_ascent = it->max_phys_ascent; | |
13027 | phys_descent = it->max_phys_descent; | |
13028 | } | |
13029 | ||
5f5c8ee5 | 13030 | PRODUCE_GLYPHS (it); |
a2889657 | 13031 | |
5f5c8ee5 GM |
13032 | /* If this display element was in marginal areas, continue with |
13033 | the next one. */ | |
13034 | if (it->area != TEXT_AREA) | |
a2889657 | 13035 | { |
5f5c8ee5 GM |
13036 | row->ascent = max (row->ascent, it->max_ascent); |
13037 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13038 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13039 | row->phys_height = max (row->phys_height, | |
13040 | it->max_phys_ascent + it->max_phys_descent); | |
cafafe0b | 13041 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13042 | continue; |
13043 | } | |
5936754e | 13044 | |
5f5c8ee5 GM |
13045 | /* Does the display element fit on the line? If we truncate |
13046 | lines, we should draw past the right edge of the window. If | |
13047 | we don't truncate, we want to stop so that we can display the | |
13048 | continuation glyph before the right margin. If lines are | |
13049 | continued, there are two possible strategies for characters | |
13050 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
13051 | glyphs as possible in this line and leave the rest for the | |
13052 | continuation line, or display the whole element in the next | |
13053 | line. Original redisplay did the former, so we do it also. */ | |
13054 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
13055 | hpos_before = it->hpos; | |
13056 | x_before = x; | |
4dcd74e6 | 13057 | |
4b41cebb | 13058 | if (/* Not a newline. */ |
4dcd74e6 | 13059 | nglyphs > 0 |
202c1b5b | 13060 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
13061 | && it->current_x < it->last_visible_x) |
13062 | { | |
37be86f2 | 13063 | it->hpos += nglyphs; |
5f5c8ee5 GM |
13064 | row->ascent = max (row->ascent, it->max_ascent); |
13065 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13066 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13067 | row->phys_height = max (row->phys_height, | |
13068 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13069 | if (it->current_x - it->pixel_width < it->first_visible_x) |
13070 | row->x = x - it->first_visible_x; | |
13071 | } | |
13072 | else | |
13073 | { | |
13074 | int new_x; | |
13075 | struct glyph *glyph; | |
13076 | ||
13077 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 13078 | { |
5f5c8ee5 GM |
13079 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
13080 | new_x = x + glyph->pixel_width; | |
13081 | ||
13082 | if (/* Lines are continued. */ | |
13083 | !it->truncate_lines_p | |
13084 | && (/* Glyph doesn't fit on the line. */ | |
13085 | new_x > it->last_visible_x | |
13086 | /* Or it fits exactly on a window system frame. */ | |
13087 | || (new_x == it->last_visible_x | |
13088 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 13089 | { |
5f5c8ee5 GM |
13090 | /* End of a continued line. */ |
13091 | ||
13092 | if (it->hpos == 0 | |
13093 | || (new_x == it->last_visible_x | |
13094 | && FRAME_WINDOW_P (it->f))) | |
13095 | { | |
e6819faf GM |
13096 | /* Current glyph is the only one on the line or |
13097 | fits exactly on the line. We must continue | |
13098 | the line because we can't draw the cursor | |
13099 | after the glyph. */ | |
5f5c8ee5 GM |
13100 | row->continued_p = 1; |
13101 | it->current_x = new_x; | |
13102 | it->continuation_lines_width += new_x; | |
13103 | ++it->hpos; | |
13104 | if (i == nglyphs - 1) | |
cafafe0b | 13105 | set_iterator_to_next (it, 1); |
5f5c8ee5 | 13106 | } |
3b3c4bf0 GM |
13107 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
13108 | && !FRAME_WINDOW_P (it->f)) | |
13109 | { | |
13110 | /* A padding glyph that doesn't fit on this line. | |
13111 | This means the whole character doesn't fit | |
13112 | on the line. */ | |
13113 | row->used[TEXT_AREA] = n_glyphs_before; | |
13114 | ||
13115 | /* Fill the rest of the row with continuation | |
13116 | glyphs like in 20.x. */ | |
13117 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
13118 | < row->glyphs[1 + TEXT_AREA]) | |
13119 | produce_special_glyphs (it, IT_CONTINUATION); | |
13120 | ||
13121 | row->continued_p = 1; | |
13122 | it->current_x = x_before; | |
13123 | it->continuation_lines_width += x_before; | |
13124 | ||
13125 | /* Restore the height to what it was before the | |
13126 | element not fitting on the line. */ | |
13127 | it->max_ascent = ascent; | |
13128 | it->max_descent = descent; | |
13129 | it->max_phys_ascent = phys_ascent; | |
13130 | it->max_phys_descent = phys_descent; | |
13131 | } | |
0df56f4d GM |
13132 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
13133 | { | |
13134 | /* A TAB that extends past the right edge of the | |
13135 | window. This produces a single glyph on | |
13136 | window system frames. We leave the glyph in | |
13137 | this row and let it fill the row, but don't | |
13138 | consume the TAB. */ | |
13139 | it->continuation_lines_width += it->last_visible_x; | |
13140 | row->ends_in_middle_of_char_p = 1; | |
13141 | row->continued_p = 1; | |
13142 | glyph->pixel_width = it->last_visible_x - x; | |
13143 | it->starts_in_middle_of_char_p = 1; | |
13144 | } | |
5f5c8ee5 | 13145 | else |
5936754e | 13146 | { |
0df56f4d GM |
13147 | /* Something other than a TAB that draws past |
13148 | the right edge of the window. Restore | |
13149 | positions to values before the element. */ | |
5f5c8ee5 GM |
13150 | row->used[TEXT_AREA] = n_glyphs_before + i; |
13151 | ||
13152 | /* Display continuation glyphs. */ | |
13153 | if (!FRAME_WINDOW_P (it->f)) | |
13154 | produce_special_glyphs (it, IT_CONTINUATION); | |
13155 | row->continued_p = 1; | |
653c329b | 13156 | |
0df56f4d | 13157 | it->continuation_lines_width += x; |
5f5c8ee5 | 13158 | |
91004049 GM |
13159 | if (nglyphs > 1 && i > 0) |
13160 | { | |
13161 | row->ends_in_middle_of_char_p = 1; | |
13162 | it->starts_in_middle_of_char_p = 1; | |
13163 | } | |
e6819faf GM |
13164 | |
13165 | /* Restore the height to what it was before the | |
13166 | element not fitting on the line. */ | |
13167 | it->max_ascent = ascent; | |
13168 | it->max_descent = descent; | |
13169 | it->max_phys_ascent = phys_ascent; | |
13170 | it->max_phys_descent = phys_descent; | |
5936754e | 13171 | } |
e6819faf | 13172 | |
5f5c8ee5 GM |
13173 | break; |
13174 | } | |
13175 | else if (new_x > it->first_visible_x) | |
13176 | { | |
13177 | /* Increment number of glyphs actually displayed. */ | |
13178 | ++it->hpos; | |
13179 | ||
13180 | if (x < it->first_visible_x) | |
13181 | /* Glyph is partially visible, i.e. row starts at | |
13182 | negative X position. */ | |
13183 | row->x = x - it->first_visible_x; | |
13184 | } | |
13185 | else | |
13186 | { | |
13187 | /* Glyph is completely off the left margin of the | |
13188 | window. This should not happen because of the | |
13189 | move_it_in_display_line at the start of | |
13190 | this function. */ | |
13191 | abort (); | |
a2889657 | 13192 | } |
a2889657 | 13193 | } |
5f5c8ee5 GM |
13194 | |
13195 | row->ascent = max (row->ascent, it->max_ascent); | |
13196 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13197 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13198 | row->phys_height = max (row->phys_height, | |
13199 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13200 | |
13201 | /* End of this display line if row is continued. */ | |
13202 | if (row->continued_p) | |
13203 | break; | |
a2889657 | 13204 | } |
a2889657 | 13205 | |
5f5c8ee5 GM |
13206 | /* Is this a line end? If yes, we're also done, after making |
13207 | sure that a non-default face is extended up to the right | |
13208 | margin of the window. */ | |
13209 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 13210 | { |
5f5c8ee5 GM |
13211 | int used_before = row->used[TEXT_AREA]; |
13212 | ||
e74fb0f7 GM |
13213 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
13214 | ||
5f5c8ee5 GM |
13215 | /* Add a space at the end of the line that is used to |
13216 | display the cursor there. */ | |
13217 | append_space (it, 0); | |
13218 | ||
13219 | /* Extend the face to the end of the line. */ | |
13220 | extend_face_to_end_of_line (it); | |
13221 | ||
13222 | /* Make sure we have the position. */ | |
13223 | if (used_before == 0) | |
13224 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
13225 | ||
13226 | /* Consume the line end. This skips over invisible lines. */ | |
cafafe0b | 13227 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13228 | it->continuation_lines_width = 0; |
13229 | break; | |
1c9241f5 | 13230 | } |
a2889657 | 13231 | |
5f5c8ee5 GM |
13232 | /* Proceed with next display element. Note that this skips |
13233 | over lines invisible because of selective display. */ | |
cafafe0b | 13234 | set_iterator_to_next (it, 1); |
b1d1124b | 13235 | |
5f5c8ee5 GM |
13236 | /* If we truncate lines, we are done when the last displayed |
13237 | glyphs reach past the right margin of the window. */ | |
13238 | if (it->truncate_lines_p | |
13239 | && (FRAME_WINDOW_P (it->f) | |
13240 | ? (it->current_x >= it->last_visible_x) | |
13241 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 13242 | { |
5f5c8ee5 GM |
13243 | /* Maybe add truncation glyphs. */ |
13244 | if (!FRAME_WINDOW_P (it->f)) | |
13245 | { | |
a98b5ed9 GM |
13246 | int i, n; |
13247 | ||
13248 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) | |
13249 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
13250 | break; | |
13251 | ||
13252 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
13253 | { | |
13254 | row->used[TEXT_AREA] = i; | |
13255 | produce_special_glyphs (it, IT_TRUNCATION); | |
13256 | } | |
5f5c8ee5 GM |
13257 | } |
13258 | ||
13259 | row->truncated_on_right_p = 1; | |
13260 | it->continuation_lines_width = 0; | |
312246d1 | 13261 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
13262 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
13263 | it->hpos = hpos_before; | |
13264 | it->current_x = x_before; | |
13265 | break; | |
75d13c64 | 13266 | } |
a2889657 | 13267 | } |
a2889657 | 13268 | |
5f5c8ee5 GM |
13269 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
13270 | at the left window margin. */ | |
13271 | if (it->first_visible_x | |
13272 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
13273 | { | |
13274 | if (!FRAME_WINDOW_P (it->f)) | |
13275 | insert_left_trunc_glyphs (it); | |
13276 | row->truncated_on_left_p = 1; | |
13277 | } | |
a2889657 | 13278 | |
5f5c8ee5 GM |
13279 | /* If the start of this line is the overlay arrow-position, then |
13280 | mark this glyph row as the one containing the overlay arrow. | |
13281 | This is clearly a mess with variable size fonts. It would be | |
13282 | better to let it be displayed like cursors under X. */ | |
e24c997d | 13283 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 13284 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
13285 | && (MATRIX_ROW_START_CHARPOS (row) |
13286 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 13287 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
13288 | && ! overlay_arrow_seen) |
13289 | { | |
b46952ae | 13290 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
5f5c8ee5 | 13291 | if (!FRAME_WINDOW_P (it->f)) |
c4628384 | 13292 | { |
5f5c8ee5 GM |
13293 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
13294 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
13295 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
13296 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
13297 | struct glyph *p2, *end; | |
13298 | ||
13299 | /* Copy the arrow glyphs. */ | |
13300 | while (glyph < arrow_end) | |
13301 | *p++ = *glyph++; | |
13302 | ||
13303 | /* Throw away padding glyphs. */ | |
13304 | p2 = p; | |
13305 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
13306 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
13307 | ++p2; | |
13308 | if (p2 > p) | |
212e4f87 | 13309 | { |
5f5c8ee5 GM |
13310 | while (p2 < end) |
13311 | *p++ = *p2++; | |
13312 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 13313 | } |
c4628384 | 13314 | } |
5f5c8ee5 | 13315 | |
a2889657 | 13316 | overlay_arrow_seen = 1; |
5f5c8ee5 | 13317 | row->overlay_arrow_p = 1; |
a2889657 JB |
13318 | } |
13319 | ||
5f5c8ee5 GM |
13320 | /* Compute pixel dimensions of this line. */ |
13321 | compute_line_metrics (it); | |
13322 | ||
13323 | /* Remember the position at which this line ends. */ | |
13324 | row->end = it->current; | |
13325 | ||
173cbca8 | 13326 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
13327 | if (it->w->cursor.vpos < 0 |
13328 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
13329 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
13330 | && cursor_row_p (it->w, row)) | |
13331 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
13332 | |
13333 | /* Highlight trailing whitespace. */ | |
8f897821 | 13334 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
13335 | highlight_trailing_whitespace (it->f, it->glyph_row); |
13336 | ||
13337 | /* Prepare for the next line. This line starts horizontally at (X | |
13338 | HPOS) = (0 0). Vertical positions are incremented. As a | |
13339 | convenience for the caller, IT->glyph_row is set to the next | |
13340 | row to be used. */ | |
13341 | it->current_x = it->hpos = 0; | |
13342 | it->current_y += row->height; | |
13343 | ++it->vpos; | |
13344 | ++it->glyph_row; | |
13345 | return row->displays_text_p; | |
a2889657 | 13346 | } |
5f5c8ee5 GM |
13347 | |
13348 | ||
a2889657 | 13349 | \f |
5f5c8ee5 GM |
13350 | /*********************************************************************** |
13351 | Menu Bar | |
13352 | ***********************************************************************/ | |
13353 | ||
13354 | /* Redisplay the menu bar in the frame for window W. | |
13355 | ||
13356 | The menu bar of X frames that don't have X toolkit support is | |
13357 | displayed in a special window W->frame->menu_bar_window. | |
13358 | ||
13359 | The menu bar of terminal frames is treated specially as far as | |
13360 | glyph matrices are concerned. Menu bar lines are not part of | |
13361 | windows, so the update is done directly on the frame matrix rows | |
13362 | for the menu bar. */ | |
7ce2c095 RS |
13363 | |
13364 | static void | |
13365 | display_menu_bar (w) | |
13366 | struct window *w; | |
13367 | { | |
5f5c8ee5 GM |
13368 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
13369 | struct it it; | |
13370 | Lisp_Object items; | |
8351baf2 | 13371 | int i; |
7ce2c095 | 13372 | |
5f5c8ee5 | 13373 | /* Don't do all this for graphical frames. */ |
dc937613 | 13374 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
13375 | if (!NILP (Vwindow_system)) |
13376 | return; | |
dc937613 | 13377 | #endif |
dc937613 | 13378 | #ifdef USE_X_TOOLKIT |
d3413a53 | 13379 | if (FRAME_X_P (f)) |
7ce2c095 | 13380 | return; |
5f5c8ee5 | 13381 | #endif |
e0f712ba | 13382 | #ifdef MAC_OS |
1a578e9b AC |
13383 | if (FRAME_MAC_P (f)) |
13384 | return; | |
13385 | #endif | |
5f5c8ee5 GM |
13386 | |
13387 | #ifdef USE_X_TOOLKIT | |
13388 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 13389 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
13390 | it.first_visible_x = 0; |
13391 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13392 | #else /* not USE_X_TOOLKIT */ | |
13393 | if (FRAME_WINDOW_P (f)) | |
13394 | { | |
13395 | /* Menu bar lines are displayed in the desired matrix of the | |
13396 | dummy window menu_bar_window. */ | |
13397 | struct window *menu_w; | |
13398 | xassert (WINDOWP (f->menu_bar_window)); | |
13399 | menu_w = XWINDOW (f->menu_bar_window); | |
13400 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 13401 | MENU_FACE_ID); |
5f5c8ee5 GM |
13402 | it.first_visible_x = 0; |
13403 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13404 | } | |
13405 | else | |
13406 | { | |
13407 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
13408 | pixel x/y. */ | |
13409 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 13410 | MENU_FACE_ID); |
5f5c8ee5 GM |
13411 | it.first_visible_x = 0; |
13412 | it.last_visible_x = FRAME_WIDTH (f); | |
13413 | } | |
13414 | #endif /* not USE_X_TOOLKIT */ | |
13415 | ||
1862a24e MB |
13416 | if (! mode_line_inverse_video) |
13417 | /* Force the menu-bar to be displayed in the default face. */ | |
13418 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13419 | ||
5f5c8ee5 GM |
13420 | /* Clear all rows of the menu bar. */ |
13421 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
13422 | { | |
13423 | struct glyph_row *row = it.glyph_row + i; | |
13424 | clear_glyph_row (row); | |
13425 | row->enabled_p = 1; | |
13426 | row->full_width_p = 1; | |
13427 | } | |
7ce2c095 | 13428 | |
5f5c8ee5 GM |
13429 | /* Display all items of the menu bar. */ |
13430 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 13431 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 13432 | { |
5f5c8ee5 GM |
13433 | Lisp_Object string; |
13434 | ||
13435 | /* Stop at nil string. */ | |
a61b7058 | 13436 | string = AREF (items, i + 1); |
8351baf2 RS |
13437 | if (NILP (string)) |
13438 | break; | |
2d66ad19 | 13439 | |
5f5c8ee5 | 13440 | /* Remember where item was displayed. */ |
a61b7058 | 13441 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 13442 | |
5f5c8ee5 GM |
13443 | /* Display the item, pad with one space. */ |
13444 | if (it.current_x < it.last_visible_x) | |
13445 | display_string (NULL, string, Qnil, 0, 0, &it, | |
2051c264 | 13446 | SCHARS (string) + 1, 0, 0, -1); |
7ce2c095 RS |
13447 | } |
13448 | ||
2d66ad19 | 13449 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
13450 | if (it.current_x < it.last_visible_x) |
13451 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 13452 | |
5f5c8ee5 GM |
13453 | /* Compute the total height of the lines. */ |
13454 | compute_line_metrics (&it); | |
7ce2c095 | 13455 | } |
5f5c8ee5 GM |
13456 | |
13457 | ||
7ce2c095 | 13458 | \f |
5f5c8ee5 GM |
13459 | /*********************************************************************** |
13460 | Mode Line | |
13461 | ***********************************************************************/ | |
13462 | ||
715e84c9 GM |
13463 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
13464 | FORCE is non-zero, redisplay mode lines unconditionally. | |
13465 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
13466 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 13467 | |
715e84c9 GM |
13468 | static int |
13469 | redisplay_mode_lines (window, force) | |
13470 | Lisp_Object window; | |
13471 | int force; | |
13472 | { | |
13473 | int nwindows = 0; | |
13474 | ||
13475 | while (!NILP (window)) | |
13476 | { | |
13477 | struct window *w = XWINDOW (window); | |
13478 | ||
13479 | if (WINDOWP (w->hchild)) | |
13480 | nwindows += redisplay_mode_lines (w->hchild, force); | |
13481 | else if (WINDOWP (w->vchild)) | |
13482 | nwindows += redisplay_mode_lines (w->vchild, force); | |
13483 | else if (force | |
13484 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
13485 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
13486 | { | |
715e84c9 GM |
13487 | struct text_pos lpoint; |
13488 | struct buffer *old = current_buffer; | |
13489 | ||
13490 | /* Set the window's buffer for the mode line display. */ | |
13491 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
13492 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
13493 | ||
13494 | /* Point refers normally to the selected window. For any | |
13495 | other window, set up appropriate value. */ | |
13496 | if (!EQ (window, selected_window)) | |
13497 | { | |
13498 | struct text_pos pt; | |
13499 | ||
13500 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); | |
13501 | if (CHARPOS (pt) < BEGV) | |
13502 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
13503 | else if (CHARPOS (pt) > (ZV - 1)) | |
13504 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
13505 | else | |
13506 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
13507 | } | |
13508 | ||
715e84c9 GM |
13509 | /* Display mode lines. */ |
13510 | clear_glyph_matrix (w->desired_matrix); | |
13511 | if (display_mode_lines (w)) | |
13512 | { | |
13513 | ++nwindows; | |
13514 | w->must_be_updated_p = 1; | |
13515 | } | |
13516 | ||
13517 | /* Restore old settings. */ | |
715e84c9 GM |
13518 | set_buffer_internal_1 (old); |
13519 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
13520 | } | |
13521 | ||
13522 | window = w->next; | |
13523 | } | |
13524 | ||
13525 | return nwindows; | |
13526 | } | |
13527 | ||
13528 | ||
13529 | /* Display the mode and/or top line of window W. Value is the number | |
13530 | of mode lines displayed. */ | |
13531 | ||
13532 | static int | |
5f5c8ee5 | 13533 | display_mode_lines (w) |
a2889657 JB |
13534 | struct window *w; |
13535 | { | |
edd1e654 | 13536 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 13537 | int n = 0; |
edd1e654 GM |
13538 | |
13539 | old_selected_frame = selected_frame; | |
13540 | selected_frame = w->frame; | |
13541 | old_selected_window = selected_window; | |
13542 | XSETWINDOW (selected_window, w); | |
715e84c9 | 13543 | |
5f5c8ee5 | 13544 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 13545 | line_number_displayed = 0; |
155ef550 | 13546 | w->column_number_displayed = Qnil; |
aa6d10fa | 13547 | |
5f5c8ee5 | 13548 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 | 13549 | { |
c96e83bf | 13550 | struct window *sel_w = XWINDOW (old_selected_window); |
f87c0a98 | 13551 | |
96d2320f | 13552 | /* Select mode line face based on the real selected window. */ |
c96e83bf | 13553 | display_mode_line (w, CURRENT_MODE_LINE_FACE_ID_3 (sel_w, sel_w, w), |
715e84c9 GM |
13554 | current_buffer->mode_line_format); |
13555 | ++n; | |
13556 | } | |
5f5c8ee5 | 13557 | |
045dee35 | 13558 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
13559 | { |
13560 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
13561 | current_buffer->header_line_format); | |
13562 | ++n; | |
13563 | } | |
13564 | ||
edd1e654 GM |
13565 | selected_frame = old_selected_frame; |
13566 | selected_window = old_selected_window; | |
715e84c9 | 13567 | return n; |
5f5c8ee5 | 13568 | } |
03b294dc | 13569 | |
03b294dc | 13570 | |
5f5c8ee5 | 13571 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 13572 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
13573 | FORMAT is the mode line format to display. Value is the pixel |
13574 | height of the mode line displayed. */ | |
03b294dc | 13575 | |
04612a64 | 13576 | static int |
5f5c8ee5 GM |
13577 | display_mode_line (w, face_id, format) |
13578 | struct window *w; | |
13579 | enum face_id face_id; | |
13580 | Lisp_Object format; | |
13581 | { | |
13582 | struct it it; | |
13583 | struct face *face; | |
03b294dc | 13584 | |
5f5c8ee5 GM |
13585 | init_iterator (&it, w, -1, -1, NULL, face_id); |
13586 | prepare_desired_row (it.glyph_row); | |
13587 | ||
1862a24e MB |
13588 | if (! mode_line_inverse_video) |
13589 | /* Force the mode-line to be displayed in the default face. */ | |
13590 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13591 | ||
5f5c8ee5 GM |
13592 | /* Temporarily make frame's keyboard the current kboard so that |
13593 | kboard-local variables in the mode_line_format will get the right | |
13594 | values. */ | |
13595 | push_frame_kboard (it.f); | |
c53a1624 | 13596 | display_mode_element (&it, 0, 0, 0, format, Qnil, 0); |
5f5c8ee5 | 13597 | pop_frame_kboard (); |
a2889657 | 13598 | |
5f5c8ee5 GM |
13599 | /* Fill up with spaces. */ |
13600 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
13601 | ||
13602 | compute_line_metrics (&it); | |
13603 | it.glyph_row->full_width_p = 1; | |
13604 | it.glyph_row->mode_line_p = 1; | |
5f5c8ee5 GM |
13605 | it.glyph_row->continued_p = 0; |
13606 | it.glyph_row->truncated_on_left_p = 0; | |
13607 | it.glyph_row->truncated_on_right_p = 0; | |
13608 | ||
13609 | /* Make a 3D mode-line have a shadow at its right end. */ | |
13610 | face = FACE_FROM_ID (it.f, face_id); | |
13611 | extend_face_to_end_of_line (&it); | |
13612 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 13613 | { |
5f5c8ee5 GM |
13614 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
13615 | + it.glyph_row->used[TEXT_AREA] - 1); | |
13616 | last->right_box_line_p = 1; | |
d7eb09a0 | 13617 | } |
04612a64 GM |
13618 | |
13619 | return it.glyph_row->height; | |
a2889657 JB |
13620 | } |
13621 | ||
0fcf414f RS |
13622 | /* Alist that caches the results of :propertize. |
13623 | Each element is (PROPERTIZED-STRING . PROPERTY-LIST). */ | |
13624 | Lisp_Object mode_line_proptrans_alist; | |
a2889657 | 13625 | |
5f5c8ee5 GM |
13626 | /* Contribute ELT to the mode line for window IT->w. How it |
13627 | translates into text depends on its data type. | |
a2889657 | 13628 | |
5f5c8ee5 | 13629 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
13630 | |
13631 | DEPTH is the depth in recursion. It is used to prevent | |
13632 | infinite recursion here. | |
13633 | ||
5f5c8ee5 GM |
13634 | FIELD_WIDTH is the number of characters the display of ELT should |
13635 | occupy in the mode line, and PRECISION is the maximum number of | |
13636 | characters to display from ELT's representation. See | |
b8523839 | 13637 | display_string for details. |
a2889657 | 13638 | |
c53a1624 RS |
13639 | Returns the hpos of the end of the text generated by ELT. |
13640 | ||
13641 | PROPS is a property list to add to any string we encounter. | |
13642 | ||
13643 | If RISKY is nonzero, remove (disregard) any properties in any string | |
13644 | we encounter, and ignore :eval and :propertize. */ | |
a2889657 JB |
13645 | |
13646 | static int | |
c53a1624 | 13647 | display_mode_element (it, depth, field_width, precision, elt, props, risky) |
5f5c8ee5 | 13648 | struct it *it; |
a2889657 | 13649 | int depth; |
5f5c8ee5 | 13650 | int field_width, precision; |
0fcf414f | 13651 | Lisp_Object elt, props; |
c53a1624 | 13652 | int risky; |
a2889657 | 13653 | { |
5f5c8ee5 | 13654 | int n = 0, field, prec; |
0fcf414f | 13655 | int literal = 0; |
5f5c8ee5 | 13656 | |
a2889657 JB |
13657 | tail_recurse: |
13658 | if (depth > 10) | |
13659 | goto invalid; | |
13660 | ||
13661 | depth++; | |
13662 | ||
0220c518 | 13663 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
13664 | { |
13665 | case Lisp_String: | |
13666 | { | |
13667 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 | 13668 | unsigned char c; |
ae02e06a | 13669 | unsigned char *this, *lisp_string; |
5f5c8ee5 | 13670 | |
c53a1624 | 13671 | if (!NILP (props) || risky) |
0fcf414f RS |
13672 | { |
13673 | Lisp_Object oprops, aelt; | |
13674 | oprops = Ftext_properties_at (make_number (0), elt); | |
c53a1624 RS |
13675 | |
13676 | if (NILP (Fequal (props, oprops)) || risky) | |
0fcf414f | 13677 | { |
ae02e06a RS |
13678 | /* If the starting string has properties, |
13679 | merge the specified ones onto the existing ones. */ | |
c53a1624 | 13680 | if (! NILP (oprops) && !risky) |
ae02e06a RS |
13681 | { |
13682 | Lisp_Object tem; | |
13683 | ||
13684 | oprops = Fcopy_sequence (oprops); | |
13685 | tem = props; | |
13686 | while (CONSP (tem)) | |
13687 | { | |
13688 | oprops = Fplist_put (oprops, XCAR (tem), | |
13689 | XCAR (XCDR (tem))); | |
13690 | tem = XCDR (XCDR (tem)); | |
13691 | } | |
13692 | props = oprops; | |
13693 | } | |
13694 | ||
0fcf414f RS |
13695 | aelt = Fassoc (elt, mode_line_proptrans_alist); |
13696 | if (! NILP (aelt) && !NILP (Fequal (props, XCDR (aelt)))) | |
adb63af1 RS |
13697 | { |
13698 | mode_line_proptrans_alist | |
13699 | = Fcons (aelt, Fdelq (aelt, mode_line_proptrans_alist)); | |
13700 | elt = XCAR (aelt); | |
13701 | } | |
0fcf414f RS |
13702 | else |
13703 | { | |
adb63af1 RS |
13704 | Lisp_Object tem; |
13705 | ||
0fcf414f | 13706 | elt = Fcopy_sequence (elt); |
dc3b2c8b SM |
13707 | Fset_text_properties (make_number (0), Flength (elt), |
13708 | props, elt); | |
adb63af1 | 13709 | /* Add this item to mode_line_proptrans_alist. */ |
0fcf414f RS |
13710 | mode_line_proptrans_alist |
13711 | = Fcons (Fcons (elt, props), | |
13712 | mode_line_proptrans_alist); | |
adb63af1 RS |
13713 | /* Truncate mode_line_proptrans_alist |
13714 | to at most 50 elements. */ | |
13715 | tem = Fnthcdr (make_number (50), | |
13716 | mode_line_proptrans_alist); | |
13717 | if (! NILP (tem)) | |
13718 | XSETCDR (tem, Qnil); | |
0fcf414f RS |
13719 | } |
13720 | } | |
13721 | } | |
13722 | ||
2051c264 | 13723 | this = SDATA (elt); |
ae02e06a RS |
13724 | lisp_string = this; |
13725 | ||
0fcf414f RS |
13726 | if (literal) |
13727 | { | |
13728 | prec = precision - n; | |
13729 | if (frame_title_ptr) | |
2051c264 | 13730 | n += store_frame_title (SDATA (elt), -1, prec); |
0fcf414f RS |
13731 | else |
13732 | n += display_string (NULL, elt, Qnil, 0, 0, it, | |
13733 | 0, prec, 0, STRING_MULTIBYTE (elt)); | |
13734 | ||
13735 | break; | |
13736 | } | |
13737 | ||
5f5c8ee5 GM |
13738 | while ((precision <= 0 || n < precision) |
13739 | && *this | |
13740 | && (frame_title_ptr | |
13741 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
13742 | { |
13743 | unsigned char *last = this; | |
5f5c8ee5 GM |
13744 | |
13745 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
13746 | while ((c = *this++) != '\0' && c != '%') |
13747 | ; | |
5f5c8ee5 | 13748 | |
a2889657 JB |
13749 | if (this - 1 != last) |
13750 | { | |
5f5c8ee5 GM |
13751 | /* Output to end of string or up to '%'. Field width |
13752 | is length of string. Don't output more than | |
13753 | PRECISION allows us. */ | |
d26b89b8 | 13754 | --this; |
eaaa65b0 GM |
13755 | |
13756 | prec = chars_in_text (last, this - last); | |
5f5c8ee5 GM |
13757 | if (precision > 0 && prec > precision - n) |
13758 | prec = precision - n; | |
13759 | ||
d39b6696 | 13760 | if (frame_title_ptr) |
d26b89b8 | 13761 | n += store_frame_title (last, 0, prec); |
d39b6696 | 13762 | else |
eaaa65b0 GM |
13763 | { |
13764 | int bytepos = last - lisp_string; | |
13765 | int charpos = string_byte_to_char (elt, bytepos); | |
13766 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
ca77144d GM |
13767 | it, 0, prec, 0, |
13768 | STRING_MULTIBYTE (elt)); | |
eaaa65b0 | 13769 | } |
a2889657 JB |
13770 | } |
13771 | else /* c == '%' */ | |
13772 | { | |
5f5c8ee5 GM |
13773 | unsigned char *percent_position = this; |
13774 | ||
13775 | /* Get the specified minimum width. Zero means | |
13776 | don't pad. */ | |
13777 | field = 0; | |
a2889657 | 13778 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 13779 | field = field * 10 + c - '0'; |
a2889657 | 13780 | |
5f5c8ee5 GM |
13781 | /* Don't pad beyond the total padding allowed. */ |
13782 | if (field_width - n > 0 && field > field_width - n) | |
13783 | field = field_width - n; | |
a2889657 | 13784 | |
5f5c8ee5 GM |
13785 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
13786 | prec = precision - n; | |
13787 | ||
a2889657 | 13788 | if (c == 'M') |
5f5c8ee5 | 13789 | n += display_mode_element (it, depth, field, prec, |
c53a1624 RS |
13790 | Vglobal_mode_string, props, |
13791 | risky); | |
a2889657 | 13792 | else if (c != 0) |
d39b6696 | 13793 | { |
72f62cb5 | 13794 | int multibyte; |
ae02e06a RS |
13795 | int bytepos, charpos; |
13796 | unsigned char *spec; | |
13797 | ||
13798 | bytepos = percent_position - lisp_string; | |
13799 | charpos = (STRING_MULTIBYTE (elt) | |
13800 | ? string_byte_to_char (elt, bytepos) | |
13801 | : bytepos); | |
13802 | ||
13803 | spec | |
72f62cb5 GM |
13804 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
13805 | ||
d39b6696 | 13806 | if (frame_title_ptr) |
5f5c8ee5 | 13807 | n += store_frame_title (spec, field, prec); |
d39b6696 | 13808 | else |
5f5c8ee5 | 13809 | { |
ae02e06a | 13810 | int nglyphs_before, nwritten; |
72f62cb5 GM |
13811 | |
13812 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; | |
72f62cb5 GM |
13813 | nwritten = display_string (spec, Qnil, elt, |
13814 | charpos, 0, it, | |
13815 | field, prec, 0, | |
13816 | multibyte); | |
5f5c8ee5 GM |
13817 | |
13818 | /* Assign to the glyphs written above the | |
13819 | string where the `%x' came from, position | |
13820 | of the `%'. */ | |
13821 | if (nwritten > 0) | |
13822 | { | |
13823 | struct glyph *glyph | |
13824 | = (it->glyph_row->glyphs[TEXT_AREA] | |
13825 | + nglyphs_before); | |
13826 | int i; | |
13827 | ||
13828 | for (i = 0; i < nwritten; ++i) | |
13829 | { | |
13830 | glyph[i].object = elt; | |
13831 | glyph[i].charpos = charpos; | |
13832 | } | |
13833 | ||
13834 | n += nwritten; | |
13835 | } | |
13836 | } | |
d39b6696 | 13837 | } |
b8523839 AS |
13838 | else /* c == 0 */ |
13839 | break; | |
a2889657 JB |
13840 | } |
13841 | } | |
13842 | } | |
13843 | break; | |
13844 | ||
13845 | case Lisp_Symbol: | |
13846 | /* A symbol: process the value of the symbol recursively | |
13847 | as if it appeared here directly. Avoid error if symbol void. | |
13848 | Special case: if value of symbol is a string, output the string | |
13849 | literally. */ | |
13850 | { | |
13851 | register Lisp_Object tem; | |
c53a1624 RS |
13852 | |
13853 | /* If the variable is not marked as risky to set | |
13854 | then its contents are risky to use. */ | |
13855 | if (NILP (Fget (elt, Qrisky_local_variable))) | |
13856 | risky = 1; | |
13857 | ||
a2889657 | 13858 | tem = Fboundp (elt); |
265a9e55 | 13859 | if (!NILP (tem)) |
a2889657 JB |
13860 | { |
13861 | tem = Fsymbol_value (elt); | |
13862 | /* If value is a string, output that string literally: | |
13863 | don't check for % within it. */ | |
e24c997d | 13864 | if (STRINGP (tem)) |
0fcf414f RS |
13865 | literal = 1; |
13866 | ||
13867 | if (!EQ (tem, elt)) | |
5f5c8ee5 GM |
13868 | { |
13869 | /* Give up right away for nil or t. */ | |
13870 | elt = tem; | |
13871 | goto tail_recurse; | |
13872 | } | |
a2889657 JB |
13873 | } |
13874 | } | |
13875 | break; | |
13876 | ||
13877 | case Lisp_Cons: | |
13878 | { | |
13879 | register Lisp_Object car, tem; | |
13880 | ||
0fcf414f RS |
13881 | /* A cons cell: five distinct cases. |
13882 | If first element is :eval or :propertize, do something special. | |
a2889657 JB |
13883 | If first element is a string or a cons, process all the elements |
13884 | and effectively concatenate them. | |
13885 | If first element is a negative number, truncate displaying cdr to | |
13886 | at most that many characters. If positive, pad (with spaces) | |
13887 | to at least that many characters. | |
13888 | If first element is a symbol, process the cadr or caddr recursively | |
13889 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 13890 | car = XCAR (elt); |
0fcf414f | 13891 | if (EQ (car, QCeval)) |
5f5c8ee5 GM |
13892 | { |
13893 | /* An element of the form (:eval FORM) means evaluate FORM | |
13894 | and use the result as mode line elements. */ | |
0fcf414f | 13895 | |
c53a1624 RS |
13896 | if (risky) |
13897 | break; | |
13898 | ||
0fcf414f RS |
13899 | if (CONSP (XCDR (elt))) |
13900 | { | |
13901 | Lisp_Object spec; | |
13902 | spec = safe_eval (XCAR (XCDR (elt))); | |
13903 | n += display_mode_element (it, depth, field_width - n, | |
c53a1624 RS |
13904 | precision - n, spec, props, |
13905 | risky); | |
0fcf414f RS |
13906 | } |
13907 | } | |
13908 | else if (EQ (car, QCpropertize)) | |
13909 | { | |
c53a1624 RS |
13910 | /* An element of the form (:propertize ELT PROPS...) |
13911 | means display ELT but applying properties PROPS. */ | |
13912 | ||
13913 | if (risky) | |
13914 | break; | |
13915 | ||
0fcf414f | 13916 | if (CONSP (XCDR (elt))) |
c53a1624 RS |
13917 | n += display_mode_element (it, depth, field_width - n, |
13918 | precision - n, XCAR (XCDR (elt)), | |
13919 | XCDR (XCDR (elt)), risky); | |
5f5c8ee5 GM |
13920 | } |
13921 | else if (SYMBOLP (car)) | |
a2889657 JB |
13922 | { |
13923 | tem = Fboundp (car); | |
9472f927 | 13924 | elt = XCDR (elt); |
e24c997d | 13925 | if (!CONSP (elt)) |
a2889657 JB |
13926 | goto invalid; |
13927 | /* elt is now the cdr, and we know it is a cons cell. | |
13928 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 13929 | if (!NILP (tem)) |
a2889657 JB |
13930 | { |
13931 | tem = Fsymbol_value (car); | |
265a9e55 | 13932 | if (!NILP (tem)) |
9472f927 GM |
13933 | { |
13934 | elt = XCAR (elt); | |
13935 | goto tail_recurse; | |
13936 | } | |
a2889657 JB |
13937 | } |
13938 | /* Symbol's value is nil (or symbol is unbound) | |
13939 | Get the cddr of the original list | |
13940 | and if possible find the caddr and use that. */ | |
9472f927 | 13941 | elt = XCDR (elt); |
265a9e55 | 13942 | if (NILP (elt)) |
a2889657 | 13943 | break; |
e24c997d | 13944 | else if (!CONSP (elt)) |
a2889657 | 13945 | goto invalid; |
9472f927 | 13946 | elt = XCAR (elt); |
a2889657 JB |
13947 | goto tail_recurse; |
13948 | } | |
e24c997d | 13949 | else if (INTEGERP (car)) |
a2889657 JB |
13950 | { |
13951 | register int lim = XINT (car); | |
9472f927 | 13952 | elt = XCDR (elt); |
a2889657 | 13953 | if (lim < 0) |
5f5c8ee5 GM |
13954 | { |
13955 | /* Negative int means reduce maximum width. */ | |
13956 | if (precision <= 0) | |
13957 | precision = -lim; | |
13958 | else | |
13959 | precision = min (precision, -lim); | |
13960 | } | |
a2889657 JB |
13961 | else if (lim > 0) |
13962 | { | |
13963 | /* Padding specified. Don't let it be more than | |
13964 | current maximum. */ | |
5f5c8ee5 GM |
13965 | if (precision > 0) |
13966 | lim = min (precision, lim); | |
13967 | ||
a2889657 JB |
13968 | /* If that's more padding than already wanted, queue it. |
13969 | But don't reduce padding already specified even if | |
13970 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 13971 | field_width = max (lim, field_width); |
a2889657 JB |
13972 | } |
13973 | goto tail_recurse; | |
13974 | } | |
e24c997d | 13975 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
13976 | { |
13977 | register int limit = 50; | |
5f5c8ee5 GM |
13978 | /* Limit is to protect against circular lists. */ |
13979 | while (CONSP (elt) | |
13980 | && --limit > 0 | |
13981 | && (precision <= 0 || n < precision)) | |
a2889657 | 13982 | { |
5f5c8ee5 | 13983 | n += display_mode_element (it, depth, field_width - n, |
c53a1624 RS |
13984 | precision - n, XCAR (elt), |
13985 | props, risky); | |
9472f927 | 13986 | elt = XCDR (elt); |
a2889657 JB |
13987 | } |
13988 | } | |
13989 | } | |
13990 | break; | |
13991 | ||
13992 | default: | |
13993 | invalid: | |
d39b6696 | 13994 | if (frame_title_ptr) |
5f5c8ee5 | 13995 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 13996 | else |
5f5c8ee5 GM |
13997 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
13998 | precision - n, 0, 0); | |
13999 | return n; | |
a2889657 JB |
14000 | } |
14001 | ||
5f5c8ee5 GM |
14002 | /* Pad to FIELD_WIDTH. */ |
14003 | if (field_width > 0 && n < field_width) | |
14004 | { | |
14005 | if (frame_title_ptr) | |
14006 | n += store_frame_title ("", field_width - n, 0); | |
14007 | else | |
14008 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
14009 | 0, 0, 0); | |
14010 | } | |
14011 | ||
14012 | return n; | |
a2889657 | 14013 | } |
5f5c8ee5 GM |
14014 | |
14015 | ||
766525bc RS |
14016 | /* Write a null-terminated, right justified decimal representation of |
14017 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
14018 | ||
14019 | static void | |
14020 | pint2str (buf, width, d) | |
14021 | register char *buf; | |
14022 | register int width; | |
14023 | register int d; | |
14024 | { | |
14025 | register char *p = buf; | |
14026 | ||
14027 | if (d <= 0) | |
5f5c8ee5 | 14028 | *p++ = '0'; |
766525bc | 14029 | else |
5f5c8ee5 | 14030 | { |
766525bc | 14031 | while (d > 0) |
5f5c8ee5 | 14032 | { |
766525bc RS |
14033 | *p++ = d % 10 + '0'; |
14034 | d /= 10; | |
5f5c8ee5 GM |
14035 | } |
14036 | } | |
14037 | ||
14038 | for (width -= (int) (p - buf); width > 0; --width) | |
14039 | *p++ = ' '; | |
766525bc RS |
14040 | *p-- = '\0'; |
14041 | while (p > buf) | |
5f5c8ee5 | 14042 | { |
766525bc RS |
14043 | d = *buf; |
14044 | *buf++ = *p; | |
14045 | *p-- = d; | |
5f5c8ee5 | 14046 | } |
766525bc RS |
14047 | } |
14048 | ||
5f5c8ee5 | 14049 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
14050 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
14051 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
14052 | ||
6693a99a | 14053 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 14054 | |
1c9241f5 KH |
14055 | static char * |
14056 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
14057 | Lisp_Object coding_system; | |
14058 | register char *buf; | |
14059 | int eol_flag; | |
14060 | { | |
1e1078d6 | 14061 | Lisp_Object val; |
916848d8 | 14062 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
14063 | unsigned char *eol_str; |
14064 | int eol_str_len; | |
14065 | /* The EOL conversion we are using. */ | |
14066 | Lisp_Object eoltype; | |
1e1078d6 | 14067 | |
4a09dee0 | 14068 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 14069 | eoltype = Qnil; |
1c9241f5 | 14070 | |
4a09dee0 | 14071 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 14072 | { |
916848d8 RS |
14073 | if (multibyte) |
14074 | *buf++ = '-'; | |
21e989e3 | 14075 | if (eol_flag) |
302f2b38 | 14076 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 14077 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
14078 | } |
14079 | else | |
14080 | { | |
1e1078d6 RS |
14081 | Lisp_Object eolvalue; |
14082 | ||
14083 | eolvalue = Fget (coding_system, Qeol_type); | |
14084 | ||
916848d8 | 14085 | if (multibyte) |
a61b7058 | 14086 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 14087 | |
1c9241f5 KH |
14088 | if (eol_flag) |
14089 | { | |
1e1078d6 RS |
14090 | /* The EOL conversion that is normal on this system. */ |
14091 | ||
14092 | if (NILP (eolvalue)) /* Not yet decided. */ | |
14093 | eoltype = eol_mnemonic_undecided; | |
14094 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
14095 | eoltype = eol_mnemonic_undecided; | |
14096 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
14097 | eoltype = (XFASTINT (eolvalue) == 0 | |
14098 | ? eol_mnemonic_unix | |
14099 | : (XFASTINT (eolvalue) == 1 | |
14100 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
14101 | } |
14102 | } | |
5f5c8ee5 | 14103 | |
302f2b38 EZ |
14104 | if (eol_flag) |
14105 | { | |
14106 | /* Mention the EOL conversion if it is not the usual one. */ | |
14107 | if (STRINGP (eoltype)) | |
14108 | { | |
2051c264 GM |
14109 | eol_str = SDATA (eoltype); |
14110 | eol_str_len = SBYTES (eoltype); | |
302f2b38 | 14111 | } |
f30b3499 KH |
14112 | else if (INTEGERP (eoltype) |
14113 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
14114 | { | |
4a09dee0 | 14115 | eol_str = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
260a86a0 | 14116 | eol_str_len = CHAR_STRING (XINT (eoltype), eol_str); |
f30b3499 | 14117 | } |
302f2b38 EZ |
14118 | else |
14119 | { | |
14120 | eol_str = invalid_eol_type; | |
14121 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 14122 | } |
f30b3499 | 14123 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 14124 | buf += eol_str_len; |
1c9241f5 | 14125 | } |
302f2b38 | 14126 | |
1c9241f5 KH |
14127 | return buf; |
14128 | } | |
14129 | ||
a2889657 | 14130 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
14131 | generated by character C. PRECISION >= 0 means don't return a |
14132 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 GM |
14133 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
14134 | if the result is multibyte text. */ | |
a2889657 | 14135 | |
11e82b76 JB |
14136 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
14137 | ||
a2889657 | 14138 | static char * |
72f62cb5 | 14139 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 14140 | struct window *w; |
68c45bf0 | 14141 | register int c; |
5f5c8ee5 | 14142 | int field_width, precision; |
72f62cb5 | 14143 | int *multibyte; |
a2889657 | 14144 | { |
0b67772d | 14145 | Lisp_Object obj; |
5f5c8ee5 GM |
14146 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
14147 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 14148 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 14149 | |
0b67772d | 14150 | obj = Qnil; |
72f62cb5 | 14151 | *multibyte = 0; |
a2889657 JB |
14152 | |
14153 | switch (c) | |
14154 | { | |
1af9f229 RS |
14155 | case '*': |
14156 | if (!NILP (b->read_only)) | |
14157 | return "%"; | |
14158 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14159 | return "*"; | |
14160 | return "-"; | |
14161 | ||
14162 | case '+': | |
14163 | /* This differs from %* only for a modified read-only buffer. */ | |
14164 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14165 | return "*"; | |
14166 | if (!NILP (b->read_only)) | |
14167 | return "%"; | |
14168 | return "-"; | |
14169 | ||
14170 | case '&': | |
14171 | /* This differs from %* in ignoring read-only-ness. */ | |
14172 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14173 | return "*"; | |
14174 | return "-"; | |
14175 | ||
14176 | case '%': | |
14177 | return "%"; | |
14178 | ||
14179 | case '[': | |
14180 | { | |
14181 | int i; | |
14182 | char *p; | |
14183 | ||
14184 | if (command_loop_level > 5) | |
14185 | return "[[[... "; | |
14186 | p = decode_mode_spec_buf; | |
14187 | for (i = 0; i < command_loop_level; i++) | |
14188 | *p++ = '['; | |
14189 | *p = 0; | |
14190 | return decode_mode_spec_buf; | |
14191 | } | |
14192 | ||
14193 | case ']': | |
14194 | { | |
14195 | int i; | |
14196 | char *p; | |
14197 | ||
14198 | if (command_loop_level > 5) | |
14199 | return " ...]]]"; | |
14200 | p = decode_mode_spec_buf; | |
14201 | for (i = 0; i < command_loop_level; i++) | |
14202 | *p++ = ']'; | |
14203 | *p = 0; | |
14204 | return decode_mode_spec_buf; | |
14205 | } | |
14206 | ||
14207 | case '-': | |
14208 | { | |
1af9f229 | 14209 | register int i; |
5f5c8ee5 GM |
14210 | |
14211 | /* Let lots_of_dashes be a string of infinite length. */ | |
14212 | if (field_width <= 0 | |
14213 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 14214 | { |
5f5c8ee5 GM |
14215 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
14216 | decode_mode_spec_buf[i] = '-'; | |
14217 | decode_mode_spec_buf[i] = '\0'; | |
14218 | return decode_mode_spec_buf; | |
1af9f229 | 14219 | } |
5f5c8ee5 GM |
14220 | else |
14221 | return lots_of_dashes; | |
1af9f229 RS |
14222 | } |
14223 | ||
a2889657 | 14224 | case 'b': |
d39b6696 | 14225 | obj = b->name; |
a2889657 JB |
14226 | break; |
14227 | ||
1af9f229 RS |
14228 | case 'c': |
14229 | { | |
14230 | int col = current_column (); | |
ac90c44f | 14231 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 14232 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
14233 | return decode_mode_spec_buf; |
14234 | } | |
14235 | ||
14236 | case 'F': | |
14237 | /* %F displays the frame name. */ | |
5f5c8ee5 | 14238 | if (!NILP (f->title)) |
2051c264 | 14239 | return (char *) SDATA (f->title); |
fd8ff63d | 14240 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
2051c264 | 14241 | return (char *) SDATA (f->name); |
9c6da96f | 14242 | return "Emacs"; |
1af9f229 | 14243 | |
a2889657 | 14244 | case 'f': |
d39b6696 | 14245 | obj = b->filename; |
a2889657 JB |
14246 | break; |
14247 | ||
aa6d10fa RS |
14248 | case 'l': |
14249 | { | |
12adba34 RS |
14250 | int startpos = XMARKER (w->start)->charpos; |
14251 | int startpos_byte = marker_byte_position (w->start); | |
14252 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 14253 | int nlines, junk; |
aa6d10fa RS |
14254 | int height = XFASTINT (w->height); |
14255 | ||
14256 | /* If we decided that this buffer isn't suitable for line numbers, | |
14257 | don't forget that too fast. */ | |
14258 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 14259 | goto no_value; |
5300fd39 RS |
14260 | /* But do forget it, if the window shows a different buffer now. */ |
14261 | else if (BUFFERP (w->base_line_pos)) | |
14262 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
14263 | |
14264 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 14265 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 14266 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
14267 | { |
14268 | w->base_line_pos = Qnil; | |
14269 | w->base_line_number = Qnil; | |
766525bc | 14270 | goto no_value; |
aa6d10fa RS |
14271 | } |
14272 | ||
14273 | if (!NILP (w->base_line_number) | |
14274 | && !NILP (w->base_line_pos) | |
12adba34 | 14275 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
14276 | { |
14277 | line = XFASTINT (w->base_line_number); | |
14278 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 14279 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
14280 | } |
14281 | else | |
14282 | { | |
14283 | line = 1; | |
d39b6696 | 14284 | linepos = BUF_BEGV (b); |
12adba34 | 14285 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
14286 | } |
14287 | ||
14288 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
14289 | nlines = display_count_lines (linepos, linepos_byte, |
14290 | startpos_byte, | |
14291 | startpos, &junk); | |
aa6d10fa RS |
14292 | |
14293 | topline = nlines + line; | |
14294 | ||
14295 | /* Determine a new base line, if the old one is too close | |
14296 | or too far away, or if we did not have one. | |
14297 | "Too close" means it's plausible a scroll-down would | |
14298 | go back past it. */ | |
d39b6696 | 14299 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 14300 | { |
ac90c44f GM |
14301 | w->base_line_number = make_number (topline); |
14302 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
14303 | } |
14304 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 14305 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 14306 | { |
d39b6696 | 14307 | int limit = BUF_BEGV (b); |
12adba34 | 14308 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 14309 | int position; |
5d121aec | 14310 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
14311 | |
14312 | if (startpos - distance > limit) | |
12adba34 RS |
14313 | { |
14314 | limit = startpos - distance; | |
14315 | limit_byte = CHAR_TO_BYTE (limit); | |
14316 | } | |
aa6d10fa | 14317 | |
12adba34 RS |
14318 | nlines = display_count_lines (startpos, startpos_byte, |
14319 | limit_byte, | |
14320 | - (height * 2 + 30), | |
aa6d10fa RS |
14321 | &position); |
14322 | /* If we couldn't find the lines we wanted within | |
5d121aec | 14323 | line_number_display_limit_width chars per line, |
aa6d10fa | 14324 | give up on line numbers for this window. */ |
12adba34 | 14325 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
14326 | { |
14327 | w->base_line_pos = w->buffer; | |
14328 | w->base_line_number = Qnil; | |
766525bc | 14329 | goto no_value; |
aa6d10fa RS |
14330 | } |
14331 | ||
ac90c44f GM |
14332 | w->base_line_number = make_number (topline - nlines); |
14333 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
14334 | } |
14335 | ||
14336 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
14337 | nlines = display_count_lines (startpos, startpos_byte, |
14338 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
14339 | |
14340 | /* Record that we did display the line number. */ | |
14341 | line_number_displayed = 1; | |
14342 | ||
14343 | /* Make the string to show. */ | |
5f5c8ee5 | 14344 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 14345 | return decode_mode_spec_buf; |
766525bc RS |
14346 | no_value: |
14347 | { | |
14348 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
14349 | int pad = field_width - 2; |
14350 | while (pad-- > 0) | |
14351 | *p++ = ' '; | |
14352 | *p++ = '?'; | |
b357b9d4 KR |
14353 | *p++ = '?'; |
14354 | *p = '\0'; | |
766525bc RS |
14355 | return decode_mode_spec_buf; |
14356 | } | |
aa6d10fa RS |
14357 | } |
14358 | break; | |
14359 | ||
a2889657 | 14360 | case 'm': |
d39b6696 | 14361 | obj = b->mode_name; |
a2889657 JB |
14362 | break; |
14363 | ||
14364 | case 'n': | |
d39b6696 | 14365 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
14366 | return " Narrow"; |
14367 | break; | |
14368 | ||
a2889657 JB |
14369 | case 'p': |
14370 | { | |
14371 | int pos = marker_position (w->start); | |
d39b6696 | 14372 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 14373 | |
d39b6696 | 14374 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 14375 | { |
d39b6696 | 14376 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14377 | return "All"; |
14378 | else | |
14379 | return "Bottom"; | |
14380 | } | |
d39b6696 | 14381 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14382 | return "Top"; |
14383 | else | |
14384 | { | |
3c7d31b9 RS |
14385 | if (total > 1000000) |
14386 | /* Do it differently for a large value, to avoid overflow. */ | |
14387 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14388 | else | |
14389 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
14390 | /* We can't normally display a 3-digit number, |
14391 | so get us a 2-digit number that is close. */ | |
14392 | if (total == 100) | |
14393 | total = 99; | |
14394 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14395 | return decode_mode_spec_buf; | |
14396 | } | |
14397 | } | |
14398 | ||
8ffcb79f RS |
14399 | /* Display percentage of size above the bottom of the screen. */ |
14400 | case 'P': | |
14401 | { | |
14402 | int toppos = marker_position (w->start); | |
d39b6696 KH |
14403 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
14404 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 14405 | |
d39b6696 | 14406 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 14407 | { |
d39b6696 | 14408 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14409 | return "All"; |
14410 | else | |
14411 | return "Bottom"; | |
14412 | } | |
14413 | else | |
14414 | { | |
3c7d31b9 RS |
14415 | if (total > 1000000) |
14416 | /* Do it differently for a large value, to avoid overflow. */ | |
14417 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14418 | else | |
14419 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
14420 | /* We can't normally display a 3-digit number, |
14421 | so get us a 2-digit number that is close. */ | |
14422 | if (total == 100) | |
14423 | total = 99; | |
d39b6696 | 14424 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14425 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
14426 | else | |
14427 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14428 | return decode_mode_spec_buf; | |
14429 | } | |
14430 | } | |
14431 | ||
1af9f229 RS |
14432 | case 's': |
14433 | /* status of process */ | |
14434 | obj = Fget_buffer_process (w->buffer); | |
14435 | if (NILP (obj)) | |
14436 | return "no process"; | |
14437 | #ifdef subprocesses | |
14438 | obj = Fsymbol_name (Fprocess_status (obj)); | |
14439 | #endif | |
14440 | break; | |
d39b6696 | 14441 | |
1af9f229 RS |
14442 | case 't': /* indicate TEXT or BINARY */ |
14443 | #ifdef MODE_LINE_BINARY_TEXT | |
14444 | return MODE_LINE_BINARY_TEXT (b); | |
14445 | #else | |
14446 | return "T"; | |
14447 | #endif | |
1c9241f5 KH |
14448 | |
14449 | case 'z': | |
14450 | /* coding-system (not including end-of-line format) */ | |
14451 | case 'Z': | |
14452 | /* coding-system (including end-of-line type) */ | |
14453 | { | |
14454 | int eol_flag = (c == 'Z'); | |
539b4d41 | 14455 | char *p = decode_mode_spec_buf; |
1c9241f5 | 14456 | |
d30e754b | 14457 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 14458 | { |
11c52c4f RS |
14459 | /* No need to mention EOL here--the terminal never needs |
14460 | to do EOL conversion. */ | |
14461 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
14462 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 14463 | } |
f13c925f | 14464 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 14465 | p, eol_flag); |
f13c925f | 14466 | |
11c52c4f | 14467 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
14468 | #ifdef subprocesses |
14469 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
14470 | if (PROCESSP (obj)) | |
14471 | { | |
14472 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
14473 | p, eol_flag); | |
14474 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
14475 | p, eol_flag); | |
14476 | } | |
14477 | #endif /* subprocesses */ | |
11c52c4f | 14478 | #endif /* 0 */ |
1c9241f5 KH |
14479 | *p = 0; |
14480 | return decode_mode_spec_buf; | |
14481 | } | |
a2889657 | 14482 | } |
d39b6696 | 14483 | |
e24c997d | 14484 | if (STRINGP (obj)) |
72f62cb5 GM |
14485 | { |
14486 | *multibyte = STRING_MULTIBYTE (obj); | |
2051c264 | 14487 | return (char *) SDATA (obj); |
72f62cb5 | 14488 | } |
a2889657 JB |
14489 | else |
14490 | return ""; | |
14491 | } | |
5f5c8ee5 GM |
14492 | |
14493 | ||
12adba34 RS |
14494 | /* Count up to COUNT lines starting from START / START_BYTE. |
14495 | But don't go beyond LIMIT_BYTE. | |
14496 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 14497 | |
12adba34 | 14498 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
14499 | |
14500 | static int | |
12adba34 RS |
14501 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
14502 | int start, start_byte, limit_byte, count; | |
14503 | int *byte_pos_ptr; | |
59b49f63 | 14504 | { |
59b49f63 RS |
14505 | register unsigned char *cursor; |
14506 | unsigned char *base; | |
14507 | ||
14508 | register int ceiling; | |
14509 | register unsigned char *ceiling_addr; | |
12adba34 | 14510 | int orig_count = count; |
59b49f63 RS |
14511 | |
14512 | /* If we are not in selective display mode, | |
14513 | check only for newlines. */ | |
12adba34 RS |
14514 | int selective_display = (!NILP (current_buffer->selective_display) |
14515 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
14516 | |
14517 | if (count > 0) | |
12adba34 RS |
14518 | { |
14519 | while (start_byte < limit_byte) | |
14520 | { | |
14521 | ceiling = BUFFER_CEILING_OF (start_byte); | |
14522 | ceiling = min (limit_byte - 1, ceiling); | |
14523 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
14524 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
14525 | while (1) | |
14526 | { | |
14527 | if (selective_display) | |
14528 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
14529 | ; | |
14530 | else | |
14531 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
14532 | ; | |
14533 | ||
14534 | if (cursor != ceiling_addr) | |
14535 | { | |
14536 | if (--count == 0) | |
14537 | { | |
14538 | start_byte += cursor - base + 1; | |
14539 | *byte_pos_ptr = start_byte; | |
14540 | return orig_count; | |
14541 | } | |
14542 | else | |
14543 | if (++cursor == ceiling_addr) | |
14544 | break; | |
14545 | } | |
14546 | else | |
14547 | break; | |
14548 | } | |
14549 | start_byte += cursor - base; | |
14550 | } | |
14551 | } | |
59b49f63 RS |
14552 | else |
14553 | { | |
12adba34 RS |
14554 | while (start_byte > limit_byte) |
14555 | { | |
14556 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
14557 | ceiling = max (limit_byte, ceiling); | |
14558 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
14559 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
14560 | while (1) |
14561 | { | |
12adba34 RS |
14562 | if (selective_display) |
14563 | while (--cursor != ceiling_addr | |
14564 | && *cursor != '\n' && *cursor != 015) | |
14565 | ; | |
14566 | else | |
14567 | while (--cursor != ceiling_addr && *cursor != '\n') | |
14568 | ; | |
14569 | ||
59b49f63 RS |
14570 | if (cursor != ceiling_addr) |
14571 | { | |
14572 | if (++count == 0) | |
14573 | { | |
12adba34 RS |
14574 | start_byte += cursor - base + 1; |
14575 | *byte_pos_ptr = start_byte; | |
14576 | /* When scanning backwards, we should | |
14577 | not count the newline posterior to which we stop. */ | |
14578 | return - orig_count - 1; | |
59b49f63 RS |
14579 | } |
14580 | } | |
14581 | else | |
14582 | break; | |
14583 | } | |
12adba34 RS |
14584 | /* Here we add 1 to compensate for the last decrement |
14585 | of CURSOR, which took it past the valid range. */ | |
14586 | start_byte += cursor - base + 1; | |
59b49f63 RS |
14587 | } |
14588 | } | |
14589 | ||
12adba34 | 14590 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 14591 | |
12adba34 RS |
14592 | if (count < 0) |
14593 | return - orig_count + count; | |
14594 | return orig_count - count; | |
aa6d10fa | 14595 | |
12adba34 | 14596 | } |
a2889657 | 14597 | |
a2889657 | 14598 | |
5f5c8ee5 GM |
14599 | \f |
14600 | /*********************************************************************** | |
14601 | Displaying strings | |
14602 | ***********************************************************************/ | |
278feba9 | 14603 | |
5f5c8ee5 | 14604 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 14605 | |
5f5c8ee5 GM |
14606 | If STRING is non-null, display that C string. Otherwise, the Lisp |
14607 | string LISP_STRING is displayed. | |
a2889657 | 14608 | |
5f5c8ee5 GM |
14609 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
14610 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
14611 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 14612 | |
5f5c8ee5 GM |
14613 | Display the string in the environment given by IT, but use the |
14614 | standard display table, temporarily. | |
a3788d53 | 14615 | |
5f5c8ee5 GM |
14616 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
14617 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
14618 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
14619 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
14620 | ||
14621 | PRECISION is the maximum number of characters to output from | |
14622 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 14623 | |
5f5c8ee5 | 14624 | This is roughly equivalent to printf format specifiers: |
a2889657 | 14625 | |
5f5c8ee5 GM |
14626 | FIELD_WIDTH PRECISION PRINTF |
14627 | ---------------------------------------- | |
14628 | -1 -1 %s | |
14629 | -1 10 %.10s | |
14630 | 10 -1 %10s | |
14631 | 20 10 %20.10s | |
a2889657 | 14632 | |
5f5c8ee5 GM |
14633 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
14634 | display them, and < 0 means obey the current buffer's value of | |
14635 | enable_multibyte_characters. | |
278feba9 | 14636 | |
5f5c8ee5 | 14637 | Value is the number of glyphs produced. */ |
b1d1124b | 14638 | |
5f5c8ee5 GM |
14639 | static int |
14640 | display_string (string, lisp_string, face_string, face_string_pos, | |
14641 | start, it, field_width, precision, max_x, multibyte) | |
14642 | unsigned char *string; | |
14643 | Lisp_Object lisp_string; | |
68c45bf0 PE |
14644 | Lisp_Object face_string; |
14645 | int face_string_pos; | |
5f5c8ee5 GM |
14646 | int start; |
14647 | struct it *it; | |
14648 | int field_width, precision, max_x; | |
14649 | int multibyte; | |
14650 | { | |
14651 | int hpos_at_start = it->hpos; | |
14652 | int saved_face_id = it->face_id; | |
14653 | struct glyph_row *row = it->glyph_row; | |
14654 | ||
14655 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 14656 | with index START. */ |
5f5c8ee5 GM |
14657 | reseat_to_string (it, string, lisp_string, start, |
14658 | precision, field_width, multibyte); | |
14659 | ||
14660 | /* If displaying STRING, set up the face of the iterator | |
14661 | from LISP_STRING, if that's given. */ | |
14662 | if (STRINGP (face_string)) | |
14663 | { | |
14664 | int endptr; | |
14665 | struct face *face; | |
14666 | ||
14667 | it->face_id | |
14668 | = face_at_string_position (it->w, face_string, face_string_pos, | |
14669 | 0, it->region_beg_charpos, | |
14670 | it->region_end_charpos, | |
5de7c6f2 | 14671 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
14672 | face = FACE_FROM_ID (it->f, it->face_id); |
14673 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 14674 | } |
a2889657 | 14675 | |
5f5c8ee5 GM |
14676 | /* Set max_x to the maximum allowed X position. Don't let it go |
14677 | beyond the right edge of the window. */ | |
14678 | if (max_x <= 0) | |
14679 | max_x = it->last_visible_x; | |
14680 | else | |
14681 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 14682 | |
5f5c8ee5 GM |
14683 | /* Skip over display elements that are not visible. because IT->w is |
14684 | hscrolled. */ | |
14685 | if (it->current_x < it->first_visible_x) | |
14686 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
14687 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 14688 | |
5f5c8ee5 GM |
14689 | row->ascent = it->max_ascent; |
14690 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
14691 | row->phys_ascent = it->max_phys_ascent; |
14692 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 14693 | |
5f5c8ee5 GM |
14694 | /* This condition is for the case that we are called with current_x |
14695 | past last_visible_x. */ | |
14696 | while (it->current_x < max_x) | |
a2889657 | 14697 | { |
5f5c8ee5 | 14698 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 14699 | |
5f5c8ee5 GM |
14700 | /* Get the next display element. */ |
14701 | if (!get_next_display_element (it)) | |
90adcf20 | 14702 | break; |
1c9241f5 | 14703 | |
5f5c8ee5 GM |
14704 | /* Produce glyphs. */ |
14705 | x_before = it->current_x; | |
14706 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
14707 | PRODUCE_GLYPHS (it); | |
90adcf20 | 14708 | |
5f5c8ee5 GM |
14709 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
14710 | i = 0; | |
14711 | x = x_before; | |
14712 | while (i < nglyphs) | |
a2889657 | 14713 | { |
5f5c8ee5 GM |
14714 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
14715 | ||
14716 | if (!it->truncate_lines_p | |
14717 | && x + glyph->pixel_width > max_x) | |
14718 | { | |
14719 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
14720 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
14721 | { | |
14722 | /* A wide character is unbreakable. */ | |
14723 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
14724 | it->current_x = x_before; | |
14725 | } | |
14726 | else | |
14727 | { | |
14728 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
14729 | it->current_x = x; | |
14730 | } | |
5f5c8ee5 GM |
14731 | break; |
14732 | } | |
14733 | else if (x + glyph->pixel_width > it->first_visible_x) | |
14734 | { | |
14735 | /* Glyph is at least partially visible. */ | |
14736 | ++it->hpos; | |
14737 | if (x < it->first_visible_x) | |
14738 | it->glyph_row->x = x - it->first_visible_x; | |
14739 | } | |
14740 | else | |
a2889657 | 14741 | { |
5f5c8ee5 GM |
14742 | /* Glyph is off the left margin of the display area. |
14743 | Should not happen. */ | |
14744 | abort (); | |
a2889657 | 14745 | } |
5f5c8ee5 GM |
14746 | |
14747 | row->ascent = max (row->ascent, it->max_ascent); | |
14748 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
14749 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
14750 | row->phys_height = max (row->phys_height, | |
14751 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
14752 | x += glyph->pixel_width; |
14753 | ++i; | |
a2889657 | 14754 | } |
5f5c8ee5 GM |
14755 | |
14756 | /* Stop if max_x reached. */ | |
14757 | if (i < nglyphs) | |
14758 | break; | |
14759 | ||
14760 | /* Stop at line ends. */ | |
14761 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 14762 | { |
5f5c8ee5 GM |
14763 | it->continuation_lines_width = 0; |
14764 | break; | |
a2889657 | 14765 | } |
1c9241f5 | 14766 | |
cafafe0b | 14767 | set_iterator_to_next (it, 1); |
a688bb24 | 14768 | |
5f5c8ee5 GM |
14769 | /* Stop if truncating at the right edge. */ |
14770 | if (it->truncate_lines_p | |
14771 | && it->current_x >= it->last_visible_x) | |
14772 | { | |
14773 | /* Add truncation mark, but don't do it if the line is | |
14774 | truncated at a padding space. */ | |
14775 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 14776 | { |
5f5c8ee5 | 14777 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
14778 | { |
14779 | int i, n; | |
14780 | ||
9299cb15 | 14781 | if (it->current_x > it->last_visible_x) |
37be86f2 | 14782 | { |
9299cb15 KH |
14783 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
14784 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
14785 | break; | |
14786 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
14787 | { | |
14788 | row->used[TEXT_AREA] = i; | |
14789 | produce_special_glyphs (it, IT_TRUNCATION); | |
14790 | } | |
37be86f2 | 14791 | } |
9299cb15 | 14792 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 14793 | } |
5f5c8ee5 | 14794 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 14795 | } |
5f5c8ee5 | 14796 | break; |
1c9241f5 | 14797 | } |
a2889657 JB |
14798 | } |
14799 | ||
5f5c8ee5 GM |
14800 | /* Maybe insert a truncation at the left. */ |
14801 | if (it->first_visible_x | |
14802 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 14803 | { |
5f5c8ee5 GM |
14804 | if (!FRAME_WINDOW_P (it->f)) |
14805 | insert_left_trunc_glyphs (it); | |
14806 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
14807 | } |
14808 | ||
5f5c8ee5 GM |
14809 | it->face_id = saved_face_id; |
14810 | ||
14811 | /* Value is number of columns displayed. */ | |
14812 | return it->hpos - hpos_at_start; | |
14813 | } | |
a2889657 | 14814 | |
a2889657 | 14815 | |
a2889657 | 14816 | \f |
3b6b6db7 | 14817 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
14818 | appears as an element of LIST or as the car of an element of LIST. |
14819 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
14820 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
14821 | Otherwise return 0. This function cannot quit. | |
14822 | The return value is 2 if the text is invisible but with an ellipsis | |
14823 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
14824 | |
14825 | int | |
14826 | invisible_p (propval, list) | |
14827 | register Lisp_Object propval; | |
14828 | Lisp_Object list; | |
14829 | { | |
3b6b6db7 SM |
14830 | register Lisp_Object tail, proptail; |
14831 | ||
14832 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
14833 | { | |
14834 | register Lisp_Object tem; | |
14835 | tem = XCAR (tail); | |
14836 | if (EQ (propval, tem)) | |
14837 | return 1; | |
14838 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
14839 | return NILP (XCDR (tem)) ? 1 : 2; | |
14840 | } | |
14841 | ||
14842 | if (CONSP (propval)) | |
14843 | { | |
14844 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
14845 | { | |
14846 | Lisp_Object propelt; | |
14847 | propelt = XCAR (proptail); | |
14848 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
14849 | { | |
14850 | register Lisp_Object tem; | |
14851 | tem = XCAR (tail); | |
14852 | if (EQ (propelt, tem)) | |
14853 | return 1; | |
14854 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
14855 | return NILP (XCDR (tem)) ? 1 : 2; | |
14856 | } | |
14857 | } | |
14858 | } | |
14859 | ||
14860 | return 0; | |
642eefc6 | 14861 | } |
5f5c8ee5 | 14862 | |
642eefc6 | 14863 | \f |
5f5c8ee5 GM |
14864 | /*********************************************************************** |
14865 | Initialization | |
14866 | ***********************************************************************/ | |
14867 | ||
a2889657 JB |
14868 | void |
14869 | syms_of_xdisp () | |
14870 | { | |
c6e89d6c GM |
14871 | Vwith_echo_area_save_vector = Qnil; |
14872 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 14873 | |
c6e89d6c GM |
14874 | Vmessage_stack = Qnil; |
14875 | staticpro (&Vmessage_stack); | |
14876 | ||
735c094c | 14877 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 14878 | staticpro (&Qinhibit_redisplay); |
735c094c | 14879 | |
b14bc55e RS |
14880 | message_dolog_marker1 = Fmake_marker (); |
14881 | staticpro (&message_dolog_marker1); | |
14882 | message_dolog_marker2 = Fmake_marker (); | |
14883 | staticpro (&message_dolog_marker2); | |
14884 | message_dolog_marker3 = Fmake_marker (); | |
14885 | staticpro (&message_dolog_marker3); | |
14886 | ||
5f5c8ee5 | 14887 | #if GLYPH_DEBUG |
7d4cc828 | 14888 | defsubr (&Sdump_frame_glyph_matrix); |
5f5c8ee5 GM |
14889 | defsubr (&Sdump_glyph_matrix); |
14890 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 14891 | defsubr (&Sdump_tool_bar_row); |
62397849 | 14892 | defsubr (&Strace_redisplay); |
bf9249e3 | 14893 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 14894 | #endif |
99a5de87 | 14895 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 14896 | defsubr (&Stool_bar_lines_needed); |
99a5de87 | 14897 | #endif |
5f5c8ee5 | 14898 | |
cf074754 RS |
14899 | staticpro (&Qmenu_bar_update_hook); |
14900 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
14901 | ||
d46fb96a | 14902 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 14903 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 14904 | |
399164b4 KH |
14905 | staticpro (&Qoverriding_local_map); |
14906 | Qoverriding_local_map = intern ("overriding-local-map"); | |
14907 | ||
75c43375 RS |
14908 | staticpro (&Qwindow_scroll_functions); |
14909 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
14910 | ||
e0bfbde6 RS |
14911 | staticpro (&Qredisplay_end_trigger_functions); |
14912 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 14913 | |
2e54982e RS |
14914 | staticpro (&Qinhibit_point_motion_hooks); |
14915 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
14916 | ||
9499d71b GM |
14917 | QCdata = intern (":data"); |
14918 | staticpro (&QCdata); | |
5f5c8ee5 | 14919 | Qdisplay = intern ("display"); |
f3751a65 | 14920 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
14921 | Qspace_width = intern ("space-width"); |
14922 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
14923 | Qraise = intern ("raise"); |
14924 | staticpro (&Qraise); | |
14925 | Qspace = intern ("space"); | |
14926 | staticpro (&Qspace); | |
f3751a65 GM |
14927 | Qmargin = intern ("margin"); |
14928 | staticpro (&Qmargin); | |
5f5c8ee5 | 14929 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 14930 | staticpro (&Qleft_margin); |
5f5c8ee5 | 14931 | Qright_margin = intern ("right-margin"); |
f3751a65 | 14932 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
14933 | Qalign_to = intern ("align-to"); |
14934 | staticpro (&Qalign_to); | |
14935 | QCalign_to = intern (":align-to"); | |
14936 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
14937 | Qrelative_width = intern ("relative-width"); |
14938 | staticpro (&Qrelative_width); | |
14939 | QCrelative_width = intern (":relative-width"); | |
14940 | staticpro (&QCrelative_width); | |
14941 | QCrelative_height = intern (":relative-height"); | |
14942 | staticpro (&QCrelative_height); | |
14943 | QCeval = intern (":eval"); | |
14944 | staticpro (&QCeval); | |
0fcf414f RS |
14945 | QCpropertize = intern (":propertize"); |
14946 | staticpro (&QCpropertize); | |
d3acf96b | 14947 | Qwhen = intern ("when"); |
f3751a65 | 14948 | staticpro (&Qwhen); |
886bd6f2 GM |
14949 | QCfile = intern (":file"); |
14950 | staticpro (&QCfile); | |
5f5c8ee5 GM |
14951 | Qfontified = intern ("fontified"); |
14952 | staticpro (&Qfontified); | |
14953 | Qfontification_functions = intern ("fontification-functions"); | |
14954 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
14955 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
14956 | staticpro (&Qtrailing_whitespace); | |
14957 | Qimage = intern ("image"); | |
14958 | staticpro (&Qimage); | |
ad4f174e GM |
14959 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
14960 | staticpro (&Qmessage_truncate_lines); | |
af79bccb RS |
14961 | Qcursor_in_non_selected_windows = intern ("cursor-in-non-selected-windows"); |
14962 | staticpro (&Qcursor_in_non_selected_windows); | |
6422c1d7 GM |
14963 | Qgrow_only = intern ("grow-only"); |
14964 | staticpro (&Qgrow_only); | |
e1477f43 GM |
14965 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
14966 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
14967 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
14968 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
14969 | Qposition = intern ("position"); |
14970 | staticpro (&Qposition); | |
14971 | Qbuffer_position = intern ("buffer-position"); | |
14972 | staticpro (&Qbuffer_position); | |
14973 | Qobject = intern ("object"); | |
14974 | staticpro (&Qobject); | |
c53a1624 RS |
14975 | Qrisky_local_variable = intern ("risky-local-variable"); |
14976 | staticpro (&Qrisky_local_variable); | |
5f5c8ee5 | 14977 | |
7033d6df RS |
14978 | list_of_error = Fcons (intern ("error"), Qnil); |
14979 | staticpro (&list_of_error); | |
14980 | ||
a2889657 JB |
14981 | last_arrow_position = Qnil; |
14982 | last_arrow_string = Qnil; | |
f3751a65 GM |
14983 | staticpro (&last_arrow_position); |
14984 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
14985 | |
14986 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
14987 | staticpro (&echo_buffer[0]); | |
14988 | staticpro (&echo_buffer[1]); | |
14989 | ||
14990 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
14991 | staticpro (&echo_area_buffer[0]); | |
14992 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 14993 | |
6a94510a GM |
14994 | Vmessages_buffer_name = build_string ("*Messages*"); |
14995 | staticpro (&Vmessages_buffer_name); | |
0fcf414f RS |
14996 | |
14997 | mode_line_proptrans_alist = Qnil; | |
14998 | staticpro (&mode_line_proptrans_alist); | |
6a94510a | 14999 | |
7ee72033 MB |
15000 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
15001 | doc: /* Non-nil means highlight trailing whitespace. | |
228299fa | 15002 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
15003 | Vshow_trailing_whitespace = Qnil; |
15004 | ||
7ee72033 MB |
15005 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
15006 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 15007 | This is used for internal purposes. */); |
735c094c KH |
15008 | Vinhibit_redisplay = Qnil; |
15009 | ||
7ee72033 MB |
15010 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
15011 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
15012 | Vglobal_mode_string = Qnil; |
15013 | ||
7ee72033 MB |
15014 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
15015 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
15016 | This must be the beginning of a line in order to work. |
15017 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
15018 | Voverlay_arrow_position = Qnil; |
15019 | ||
7ee72033 MB |
15020 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
15021 | doc: /* String to display as an arrow. See also `overlay-arrow-position'. */); | |
a2889657 JB |
15022 | Voverlay_arrow_string = Qnil; |
15023 | ||
7ee72033 MB |
15024 | DEFVAR_INT ("scroll-step", &scroll_step, |
15025 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
15026 | If that fails to bring point back on frame, point is centered instead. |
15027 | If this is zero, point is always centered after it moves off frame. | |
15028 | If you want scrolling to always be a line at a time, you should set | |
15029 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
15030 | ||
7ee72033 MB |
15031 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
15032 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
15033 | A value of zero means to scroll the text to center point vertically |
15034 | in the window. */); | |
0789adb2 RS |
15035 | scroll_conservatively = 0; |
15036 | ||
7ee72033 MB |
15037 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
15038 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
15039 | Recenter the window whenever point gets within this many lines |
15040 | of the top or bottom of the window. */); | |
9afd2168 RS |
15041 | scroll_margin = 0; |
15042 | ||
5f5c8ee5 | 15043 | #if GLYPH_DEBUG |
7ee72033 | 15044 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 15045 | #endif |
a2889657 JB |
15046 | |
15047 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
15048 | &truncate_partial_width_windows, |
15049 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
15050 | truncate_partial_width_windows = 1; |
15051 | ||
7ee72033 MB |
15052 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
15053 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa GM |
15054 | Any other value means to use the appropriate face, `mode-line', |
15055 | `header-line', or `menu' respectively. | |
15056 | ||
15057 | This variable is deprecated; please change the above faces instead. */); | |
1862a24e | 15058 | mode_line_inverse_video = 1; |
aa6d10fa | 15059 | |
7ee72033 MB |
15060 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
15061 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
15062 | If the buffer is bigger than this, the line number does not appear |
15063 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 15064 | Vline_number_display_limit = Qnil; |
fba9ce76 | 15065 | |
090703f4 | 15066 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
15067 | &line_number_display_limit_width, |
15068 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
15069 | If the average length of the lines near point is bigger than this, then the |
15070 | line number may be omitted from the mode line. */); | |
5d121aec KH |
15071 | line_number_display_limit_width = 200; |
15072 | ||
7ee72033 MB |
15073 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
15074 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 15075 | highlight_nonselected_windows = 0; |
d39b6696 | 15076 | |
7ee72033 MB |
15077 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
15078 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
15079 | Minibuffer-only frames don't count, but iconified frames do. |
15080 | This variable is not guaranteed to be accurate except while processing | |
15081 | `frame-title-format' and `icon-title-format'. */); | |
15082 | ||
7ee72033 MB |
15083 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
15084 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
15085 | \(Assuming the window manager supports this feature.) |
15086 | This variable has the same structure as `mode-line-format' (which see), | |
15087 | and is used only on frames for which no explicit name has been set | |
15088 | \(see `modify-frame-parameters'). */); | |
7ee72033 MB |
15089 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
15090 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
15091 | \(Assuming the window manager supports this feature.) |
15092 | This variable has the same structure as `mode-line-format' (which see), | |
15093 | and is used only on frames for which no explicit name has been set | |
15094 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
15095 | Vicon_title_format |
15096 | = Vframe_title_format | |
15097 | = Fcons (intern ("multiple-frames"), | |
15098 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 15099 | Fcons (Fcons (empty_string, |
d39b6696 KH |
15100 | Fcons (intern ("invocation-name"), |
15101 | Fcons (build_string ("@"), | |
15102 | Fcons (intern ("system-name"), | |
15103 | Qnil)))), | |
15104 | Qnil))); | |
5992c4f7 | 15105 | |
7ee72033 MB |
15106 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
15107 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
15108 | If nil, disable message logging. If t, log messages but don't truncate |
15109 | the buffer when it becomes large. */); | |
ac90c44f | 15110 | Vmessage_log_max = make_number (50); |
08b610e4 | 15111 | |
7ee72033 MB |
15112 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
15113 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
15114 | The value should be a list of functions that take one argument. |
15115 | Just before redisplay, for each frame, if any of its windows have changed | |
15116 | size since the last redisplay, or have been split or deleted, | |
15117 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 15118 | Vwindow_size_change_functions = Qnil; |
75c43375 | 15119 | |
7ee72033 MB |
15120 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
15121 | doc: /* List of Functions to call before redisplaying a window with scrolling. | |
228299fa GM |
15122 | Each function is called with two arguments, the window |
15123 | and its new display-start position. Note that the value of `window-end' | |
15124 | is not valid when these functions are called. */); | |
75c43375 | 15125 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 15126 | |
7ee72033 MB |
15127 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
15128 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
15129 | This increases a tool-bar's height if not all tool-bar items are visible. |
15130 | It decreases a tool-bar's height when it would display blank lines | |
15131 | otherwise. */); | |
e037b9ec | 15132 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 15133 | |
7ee72033 MB |
15134 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
15135 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 15136 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 15137 | |
7ee72033 MB |
15138 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
15139 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa | 15140 | If an integer, use that for both horizontal and vertical margins. |
f6c89f27 | 15141 | Otherwise, value should be a pair of integers `(HORZ . VERT)' with |
228299fa GM |
15142 | HORZ specifying the horizontal margin, and VERT specifying the |
15143 | vertical margin. */); | |
c3d76173 | 15144 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 15145 | |
7ee72033 | 15146 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
6da3c85b | 15147 | doc: /* *Relief thickness of tool-bar buttons. */); |
c3d76173 | 15148 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 15149 | |
7ee72033 MB |
15150 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
15151 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
15152 | Each function is called with one argument POS. Functions must |
15153 | fontify a region starting at POS in the current buffer, and give | |
15154 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 15155 | Vfontification_functions = Qnil; |
6b9f0906 | 15156 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
15157 | |
15158 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
15159 | &unibyte_display_via_language_environment, |
15160 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
15161 | Specifically this means that unibyte non-ASCII characters |
15162 | are displayed by converting them to the equivalent multibyte characters | |
15163 | according to the current language environment. As a result, they are | |
15164 | displayed according to the current fontset. */); | |
7bbe686f | 15165 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 15166 | |
7ee72033 MB |
15167 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
15168 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
15169 | If a float, it specifies a fraction of the mini-window frame's height. |
15170 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 15171 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 15172 | |
7ee72033 MB |
15173 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
15174 | doc: /* *How to resize mini-windows. | |
228299fa GM |
15175 | A value of nil means don't automatically resize mini-windows. |
15176 | A value of t means resize them to fit the text displayed in them. | |
15177 | A value of `grow-only', the default, means let mini-windows grow | |
15178 | only, until their display becomes empty, at which point the windows | |
15179 | go back to their normal size. */); | |
6422c1d7 GM |
15180 | Vresize_mini_windows = Qgrow_only; |
15181 | ||
d6d26ed3 | 15182 | DEFVAR_BOOL ("cursor-in-non-selected-windows", |
7ee72033 MB |
15183 | &cursor_in_non_selected_windows, |
15184 | doc: /* *Non-nil means display a hollow cursor in non-selected windows. | |
f0529b5b | 15185 | nil means don't display a cursor there. */); |
d6d26ed3 | 15186 | cursor_in_non_selected_windows = 1; |
d475bcb8 | 15187 | |
e76d28d5 | 15188 | DEFVAR_BOOL ("auto-hscroll-mode", &automatic_hscrolling_p, |
7ee72033 | 15189 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); |
d475bcb8 | 15190 | automatic_hscrolling_p = 1; |
1df7e8f0 | 15191 | |
e76d28d5 | 15192 | DEFVAR_INT ("hscroll-margin", &hscroll_margin, |
1df7e8f0 EZ |
15193 | doc: /* *How many columns away from the window edge point is allowed to get |
15194 | before automatic hscrolling will horizontally scroll the window. */); | |
e76d28d5 | 15195 | hscroll_margin = 5; |
1df7e8f0 | 15196 | |
e76d28d5 | 15197 | DEFVAR_LISP ("hscroll-step", &Vhscroll_step, |
1df7e8f0 EZ |
15198 | doc: /* *How many columns to scroll the window when point gets too close to the edge. |
15199 | When point is less than `automatic-hscroll-margin' columns from the window | |
15200 | edge, automatic hscrolling will scroll the window by the amount of columns | |
15201 | determined by this variable. If its value is a positive integer, scroll that | |
15202 | many columns. If it's a positive floating-point number, it specifies the | |
15203 | fraction of the window's width to scroll. If it's nil or zero, point will be | |
15204 | centered horizontally after the scroll. Any other value, including negative | |
15205 | numbers, are treated as if the value were zero. | |
15206 | ||
15207 | Automatic hscrolling always moves point outside the scroll margin, so if | |
15208 | point was more than scroll step columns inside the margin, the window will | |
15209 | scroll more than the value given by the scroll step. | |
15210 | ||
15211 | Note that the lower bound for automatic hscrolling specified by `scroll-left' | |
15212 | and `scroll-right' overrides this variable's effect. */); | |
e76d28d5 | 15213 | Vhscroll_step = make_number (0); |
e00daaa0 | 15214 | |
7ee72033 MB |
15215 | DEFVAR_LISP ("image-types", &Vimage_types, |
15216 | doc: /* List of supported image types. | |
228299fa | 15217 | Each element of the list is a symbol for a supported image type. */); |
e00daaa0 | 15218 | Vimage_types = Qnil; |
ad4f174e | 15219 | |
7ee72033 MB |
15220 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
15221 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 15222 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 15223 | message_truncate_lines = 0; |
0bca8940 | 15224 | |
7ee72033 MB |
15225 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
15226 | doc: /* Normal hook run for clicks on menu bar, before displaying a submenu. | |
228299fa | 15227 | Can be used to update submenus whose contents should vary. */); |
6422c1d7 | 15228 | Vmenu_bar_update_hook = Qnil; |
e1477f43 | 15229 | |
7ee72033 MB |
15230 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
15231 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 15232 | inhibit_menubar_update = 0; |
30a3f61c | 15233 | |
7ee72033 MB |
15234 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
15235 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 15236 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 15237 | |
69d1f7c9 | 15238 | #if GLYPH_DEBUG |
76cb5e06 GM |
15239 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
15240 | doc: /* Inhibit try_window_id display optimization. */); | |
15241 | inhibit_try_window_id = 0; | |
15242 | ||
15243 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
15244 | doc: /* Inhibit try_window_reusing display optimization. */); | |
15245 | inhibit_try_window_reusing = 0; | |
15246 | ||
15247 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
15248 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
15249 | inhibit_try_cursor_movement = 0; | |
15250 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
15251 | } |
15252 | ||
5f5c8ee5 GM |
15253 | |
15254 | /* Initialize this module when Emacs starts. */ | |
15255 | ||
dfcf069d | 15256 | void |
a2889657 JB |
15257 | init_xdisp () |
15258 | { | |
15259 | Lisp_Object root_window; | |
5f5c8ee5 | 15260 | struct window *mini_w; |
a2889657 | 15261 | |
04612a64 GM |
15262 | current_header_line_height = current_mode_line_height = -1; |
15263 | ||
5f5c8ee5 | 15264 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
15265 | |
15266 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 15267 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 15268 | |
a2889657 JB |
15269 | if (!noninteractive) |
15270 | { | |
5f5c8ee5 GM |
15271 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
15272 | int i; | |
15273 | ||
ac90c44f | 15274 | XWINDOW (root_window)->top = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 15275 | set_window_height (root_window, |
5f5c8ee5 | 15276 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 15277 | 0); |
ac90c44f | 15278 | mini_w->top = make_number (FRAME_HEIGHT (f) - 1); |
a2889657 JB |
15279 | set_window_height (minibuf_window, 1, 0); |
15280 | ||
ac90c44f GM |
15281 | XWINDOW (root_window)->width = make_number (FRAME_WIDTH (f)); |
15282 | mini_w->width = make_number (FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
15283 | |
15284 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
15285 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
15286 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
15287 | ||
15288 | /* The default ellipsis glyphs `...'. */ | |
15289 | for (i = 0; i < 3; ++i) | |
ac90c44f | 15290 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 15291 | } |
5f5c8ee5 GM |
15292 | |
15293 | #ifdef HAVE_WINDOW_SYSTEM | |
15294 | { | |
15295 | /* Allocate the buffer for frame titles. */ | |
15296 | int size = 100; | |
15297 | frame_title_buf = (char *) xmalloc (size); | |
15298 | frame_title_buf_end = frame_title_buf + size; | |
15299 | frame_title_ptr = NULL; | |
15300 | } | |
15301 | #endif /* HAVE_WINDOW_SYSTEM */ | |
21fdfb65 GM |
15302 | |
15303 | help_echo_showing_p = 0; | |
a2889657 | 15304 | } |
5f5c8ee5 GM |
15305 | |
15306 |