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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 | |
1a578e9b AC |
197 | #ifdef macintosh |
198 | #include "macterm.h" | |
199 | #endif | |
a2889657 | 200 | |
5f5c8ee5 GM |
201 | #define INFINITY 10000000 |
202 | ||
1a578e9b | 203 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
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 GM |
228 | |
229 | /* Functions called to fontify regions of text. */ | |
230 | ||
231 | Lisp_Object Vfontification_functions; | |
232 | Lisp_Object Qfontification_functions; | |
233 | ||
e037b9ec | 234 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
235 | over them. */ |
236 | ||
e037b9ec | 237 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 238 | |
e037b9ec | 239 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 240 | |
35a41507 | 241 | Lisp_Object Vtool_bar_button_margin; |
5f5c8ee5 | 242 | |
e037b9ec | 243 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 244 | |
31ade731 | 245 | EMACS_INT tool_bar_button_relief; |
5f5c8ee5 | 246 | |
e037b9ec | 247 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
248 | items are visible, and no blank lines remain. */ |
249 | ||
e037b9ec | 250 | int auto_resize_tool_bars_p; |
399164b4 | 251 | |
735c094c KH |
252 | /* Non-nil means don't actually do any redisplay. */ |
253 | ||
254 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
255 | ||
30a3f61c GM |
256 | /* Non-zero means Lisp evaluation during redisplay is inhibited. */ |
257 | ||
869fb12c | 258 | int inhibit_eval_during_redisplay; |
30a3f61c | 259 | |
5f5c8ee5 GM |
260 | /* Names of text properties relevant for redisplay. */ |
261 | ||
a7e27ef7 | 262 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
4b41cebb | 263 | extern Lisp_Object Qface, Qinvisible, Qwidth; |
5f5c8ee5 GM |
264 | |
265 | /* Symbols used in text property values. */ | |
266 | ||
267 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 268 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 269 | Lisp_Object Qmargin; |
a7e27ef7 | 270 | extern Lisp_Object Qheight; |
5f5c8ee5 | 271 | |
8f897821 | 272 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 273 | |
8f897821 | 274 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
275 | |
276 | /* Name of the face used to highlight trailing whitespace. */ | |
277 | ||
278 | Lisp_Object Qtrailing_whitespace; | |
279 | ||
280 | /* The symbol `image' which is the car of the lists used to represent | |
281 | images in Lisp. */ | |
282 | ||
283 | Lisp_Object Qimage; | |
284 | ||
285 | /* Non-zero means print newline to stdout before next mini-buffer | |
286 | message. */ | |
a2889657 JB |
287 | |
288 | int noninteractive_need_newline; | |
289 | ||
5f5c8ee5 | 290 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 291 | |
3c6595e0 | 292 | static int message_log_need_newline; |
f88eb0b6 | 293 | |
b14bc55e RS |
294 | /* Three markers that message_dolog uses. |
295 | It could allocate them itself, but that causes trouble | |
296 | in handling memory-full errors. */ | |
297 | static Lisp_Object message_dolog_marker1; | |
298 | static Lisp_Object message_dolog_marker2; | |
299 | static Lisp_Object message_dolog_marker3; | |
5f5c8ee5 GM |
300 | \f |
301 | /* The buffer position of the first character appearing entirely or | |
302 | partially on the line of the selected window which contains the | |
303 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
304 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 305 | |
5f5c8ee5 | 306 | static struct text_pos this_line_start_pos; |
a2889657 | 307 | |
5f5c8ee5 GM |
308 | /* Number of characters past the end of the line above, including the |
309 | terminating newline. */ | |
310 | ||
311 | static struct text_pos this_line_end_pos; | |
312 | ||
313 | /* The vertical positions and the height of this line. */ | |
a2889657 | 314 | |
a2889657 | 315 | static int this_line_vpos; |
5f5c8ee5 GM |
316 | static int this_line_y; |
317 | static int this_line_pixel_height; | |
318 | ||
319 | /* X position at which this display line starts. Usually zero; | |
320 | negative if first character is partially visible. */ | |
321 | ||
322 | static int this_line_start_x; | |
a2889657 | 323 | |
5f5c8ee5 | 324 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 325 | |
a2889657 JB |
326 | static struct buffer *this_line_buffer; |
327 | ||
5f5c8ee5 GM |
328 | /* Nonzero means truncate lines in all windows less wide than the |
329 | frame. */ | |
a2889657 | 330 | |
a2889657 JB |
331 | int truncate_partial_width_windows; |
332 | ||
7bbe686f | 333 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 334 | |
7bbe686f | 335 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
336 | |
337 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
338 | Not guaranteed to be accurate except while parsing | |
339 | frame-title-format. */ | |
7bbe686f | 340 | |
d39b6696 KH |
341 | int multiple_frames; |
342 | ||
a2889657 JB |
343 | Lisp_Object Vglobal_mode_string; |
344 | ||
345 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 346 | |
a2889657 JB |
347 | Lisp_Object Voverlay_arrow_position; |
348 | ||
5f5c8ee5 GM |
349 | /* String to display for the arrow. Only used on terminal frames. */ |
350 | ||
a2889657 JB |
351 | Lisp_Object Voverlay_arrow_string; |
352 | ||
5f5c8ee5 GM |
353 | /* Values of those variables at last redisplay. However, if |
354 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
355 | numerical position. */ | |
356 | ||
d45de95b RS |
357 | static Lisp_Object last_arrow_position, last_arrow_string; |
358 | ||
5f5c8ee5 GM |
359 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
360 | ||
d39b6696 KH |
361 | Lisp_Object Vframe_title_format; |
362 | ||
5f5c8ee5 GM |
363 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
364 | ||
d39b6696 KH |
365 | Lisp_Object Vicon_title_format; |
366 | ||
08b610e4 RS |
367 | /* List of functions to call when a window's size changes. These |
368 | functions get one arg, a frame on which one or more windows' sizes | |
369 | have changed. */ | |
5f5c8ee5 | 370 | |
08b610e4 RS |
371 | static Lisp_Object Vwindow_size_change_functions; |
372 | ||
0bca8940 | 373 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 374 | |
a2889657 | 375 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 376 | |
5f5c8ee5 | 377 | static int overlay_arrow_seen; |
ca26e1c8 | 378 | |
fba9ce76 | 379 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 380 | |
5f5c8ee5 GM |
381 | int highlight_nonselected_windows; |
382 | ||
383 | /* If cursor motion alone moves point off frame, try scrolling this | |
384 | many lines up or down if that will bring it back. */ | |
385 | ||
31ade731 | 386 | static EMACS_INT scroll_step; |
a2889657 | 387 | |
4b41cebb | 388 | /* Nonzero means scroll just far enough to bring point back on the |
5f5c8ee5 GM |
389 | screen, when appropriate. */ |
390 | ||
31ade731 | 391 | static EMACS_INT scroll_conservatively; |
0789adb2 | 392 | |
5f5c8ee5 GM |
393 | /* Recenter the window whenever point gets within this many lines of |
394 | the top or bottom of the window. This value is translated into a | |
395 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
396 | there is really a fixed pixel height scroll margin. */ | |
397 | ||
31ade731 | 398 | EMACS_INT scroll_margin; |
9afd2168 | 399 | |
5f5c8ee5 GM |
400 | /* Number of windows showing the buffer of the selected window (or |
401 | another buffer with the same base buffer). keyboard.c refers to | |
402 | this. */ | |
a2889657 | 403 | |
a2889657 JB |
404 | int buffer_shared; |
405 | ||
5f5c8ee5 | 406 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 407 | |
5f5c8ee5 | 408 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 409 | |
1862a24e MB |
410 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
411 | (this slightly odd definition is for compatibility with previous versions | |
412 | of emacs), non-zero means display them using their respective faces. | |
413 | ||
414 | This variable is deprecated. */ | |
a2889657 | 415 | |
a2889657 JB |
416 | int mode_line_inverse_video; |
417 | ||
5f5c8ee5 GM |
418 | /* Prompt to display in front of the mini-buffer contents. */ |
419 | ||
8c5b6a0a | 420 | Lisp_Object minibuf_prompt; |
a2889657 | 421 | |
5f5c8ee5 GM |
422 | /* Width of current mini-buffer prompt. Only set after display_line |
423 | of the line that contains the prompt. */ | |
424 | ||
a2889657 | 425 | int minibuf_prompt_width; |
5f5c8ee5 GM |
426 | int minibuf_prompt_pixel_width; |
427 | ||
5f5c8ee5 GM |
428 | /* This is the window where the echo area message was displayed. It |
429 | is always a mini-buffer window, but it may not be the same window | |
430 | currently active as a mini-buffer. */ | |
431 | ||
73af359d RS |
432 | Lisp_Object echo_area_window; |
433 | ||
c6e89d6c GM |
434 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
435 | pushes the current message and the value of | |
436 | message_enable_multibyte on the stack, the function restore_message | |
437 | pops the stack and displays MESSAGE again. */ | |
438 | ||
439 | Lisp_Object Vmessage_stack; | |
440 | ||
a3788d53 RS |
441 | /* Nonzero means multibyte characters were enabled when the echo area |
442 | message was specified. */ | |
5f5c8ee5 | 443 | |
a3788d53 RS |
444 | int message_enable_multibyte; |
445 | ||
4b41cebb | 446 | /* Nonzero if we should redraw the mode lines on the next redisplay. */ |
5f5c8ee5 | 447 | |
a2889657 JB |
448 | int update_mode_lines; |
449 | ||
5f5c8ee5 | 450 | /* Nonzero if window sizes or contents have changed since last |
4b41cebb | 451 | redisplay that finished. */ |
5f5c8ee5 | 452 | |
a2889657 JB |
453 | int windows_or_buffers_changed; |
454 | ||
5f5c8ee5 GM |
455 | /* Nonzero after display_mode_line if %l was used and it displayed a |
456 | line number. */ | |
457 | ||
aa6d10fa RS |
458 | int line_number_displayed; |
459 | ||
460 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 461 | |
090703f4 | 462 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 463 | |
4b41cebb | 464 | /* Line width to consider when repositioning for line number display. */ |
5d121aec | 465 | |
31ade731 | 466 | static EMACS_INT line_number_display_limit_width; |
5d121aec | 467 | |
5f5c8ee5 GM |
468 | /* Number of lines to keep in the message log buffer. t means |
469 | infinite. nil means don't log at all. */ | |
470 | ||
5992c4f7 | 471 | Lisp_Object Vmessage_log_max; |
d45de95b | 472 | |
6a94510a GM |
473 | /* The name of the *Messages* buffer, a string. */ |
474 | ||
475 | static Lisp_Object Vmessages_buffer_name; | |
476 | ||
c6e89d6c GM |
477 | /* Current, index 0, and last displayed echo area message. Either |
478 | buffers from echo_buffers, or nil to indicate no message. */ | |
479 | ||
480 | Lisp_Object echo_area_buffer[2]; | |
481 | ||
482 | /* The buffers referenced from echo_area_buffer. */ | |
483 | ||
484 | static Lisp_Object echo_buffer[2]; | |
485 | ||
486 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
487 | ||
488 | static Lisp_Object Vwith_echo_area_save_vector; | |
489 | ||
490 | /* Non-zero means display_echo_area should display the last echo area | |
491 | message again. Set by redisplay_preserve_echo_area. */ | |
492 | ||
493 | static int display_last_displayed_message_p; | |
494 | ||
495 | /* Nonzero if echo area is being used by print; zero if being used by | |
496 | message. */ | |
497 | ||
498 | int message_buf_print; | |
499 | ||
e1477f43 GM |
500 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
501 | ||
502 | Lisp_Object Qinhibit_menubar_update; | |
503 | int inhibit_menubar_update; | |
504 | ||
9142dd5b GM |
505 | /* Maximum height for resizing mini-windows. Either a float |
506 | specifying a fraction of the available height, or an integer | |
507 | specifying a number of lines. */ | |
c6e89d6c | 508 | |
ad4f174e GM |
509 | Lisp_Object Vmax_mini_window_height; |
510 | ||
511 | /* Non-zero means messages should be displayed with truncated | |
512 | lines instead of being continued. */ | |
513 | ||
514 | int message_truncate_lines; | |
515 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 516 | |
6e019995 GM |
517 | /* Set to 1 in clear_message to make redisplay_internal aware |
518 | of an emptied echo area. */ | |
519 | ||
520 | static int message_cleared_p; | |
521 | ||
d6d26ed3 GM |
522 | /* Non-zero means we want a hollow cursor in windows that are not |
523 | selected. Zero means there's no cursor in such windows. */ | |
524 | ||
525 | int cursor_in_non_selected_windows; | |
af79bccb | 526 | Lisp_Object Qcursor_in_non_selected_windows; |
d6d26ed3 | 527 | |
5f5c8ee5 GM |
528 | /* A scratch glyph row with contents used for generating truncation |
529 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 530 | |
5f5c8ee5 GM |
531 | #define MAX_SCRATCH_GLYPHS 100 |
532 | struct glyph_row scratch_glyph_row; | |
533 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 534 | |
5f5c8ee5 GM |
535 | /* Ascent and height of the last line processed by move_it_to. */ |
536 | ||
537 | static int last_max_ascent, last_height; | |
538 | ||
21fdfb65 GM |
539 | /* Non-zero if there's a help-echo in the echo area. */ |
540 | ||
541 | int help_echo_showing_p; | |
542 | ||
04612a64 GM |
543 | /* If >= 0, computed, exact values of mode-line and header-line height |
544 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
545 | CURRENT_HEADER_LINE_HEIGHT. */ | |
546 | ||
547 | int current_mode_line_height, current_header_line_height; | |
548 | ||
5f5c8ee5 GM |
549 | /* The maximum distance to look ahead for text properties. Values |
550 | that are too small let us call compute_char_face and similar | |
551 | functions too often which is expensive. Values that are too large | |
552 | let us call compute_char_face and alike too often because we | |
553 | might not be interested in text properties that far away. */ | |
554 | ||
555 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
556 | ||
47589c8c GM |
557 | #if GLYPH_DEBUG |
558 | ||
76cb5e06 GM |
559 | /* Variables to turn off display optimizations from Lisp. */ |
560 | ||
561 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
562 | int inhibit_try_cursor_movement; | |
563 | ||
5f5c8ee5 GM |
564 | /* Non-zero means print traces of redisplay if compiled with |
565 | GLYPH_DEBUG != 0. */ | |
566 | ||
5f5c8ee5 | 567 | int trace_redisplay_p; |
47589c8c | 568 | |
546a4f00 | 569 | #endif /* GLYPH_DEBUG */ |
47589c8c | 570 | |
546a4f00 AI |
571 | #ifdef DEBUG_TRACE_MOVE |
572 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
573 | int trace_move; |
574 | ||
47589c8c GM |
575 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
576 | #else | |
91c3f500 | 577 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 578 | #endif |
546a4f00 | 579 | |
d475bcb8 GM |
580 | /* Non-zero means automatically scroll windows horizontally to make |
581 | point visible. */ | |
582 | ||
583 | int automatic_hscrolling_p; | |
584 | ||
1df7e8f0 EZ |
585 | /* How close to the margin can point get before the window is scrolled |
586 | horizontally. */ | |
5d335845 | 587 | EMACS_INT hscroll_margin; |
1df7e8f0 EZ |
588 | |
589 | /* How much to scroll horizontally when point is inside the above margin. */ | |
e76d28d5 | 590 | Lisp_Object Vhscroll_step; |
1df7e8f0 | 591 | |
e00daaa0 GM |
592 | /* A list of symbols, one for each supported image type. */ |
593 | ||
594 | Lisp_Object Vimage_types; | |
595 | ||
6422c1d7 | 596 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 597 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
598 | display. If `grow-only', let mini-windows grow only until they |
599 | become empty. */ | |
600 | ||
601 | Lisp_Object Vresize_mini_windows; | |
602 | ||
82a7ab23 RS |
603 | /* Buffer being redisplayed -- for redisplay_window_error. */ |
604 | ||
605 | struct buffer *displayed_buffer; | |
606 | ||
5f5c8ee5 GM |
607 | /* Value returned from text property handlers (see below). */ |
608 | ||
609 | enum prop_handled | |
3c6595e0 | 610 | { |
5f5c8ee5 GM |
611 | HANDLED_NORMALLY, |
612 | HANDLED_RECOMPUTE_PROPS, | |
613 | HANDLED_OVERLAY_STRING_CONSUMED, | |
614 | HANDLED_RETURN | |
615 | }; | |
3c6595e0 | 616 | |
5f5c8ee5 GM |
617 | /* A description of text properties that redisplay is interested |
618 | in. */ | |
3c6595e0 | 619 | |
5f5c8ee5 GM |
620 | struct props |
621 | { | |
622 | /* The name of the property. */ | |
623 | Lisp_Object *name; | |
90adcf20 | 624 | |
5f5c8ee5 GM |
625 | /* A unique index for the property. */ |
626 | enum prop_idx idx; | |
627 | ||
628 | /* A handler function called to set up iterator IT from the property | |
629 | at IT's current position. Value is used to steer handle_stop. */ | |
630 | enum prop_handled (*handler) P_ ((struct it *it)); | |
631 | }; | |
632 | ||
633 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
634 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
635 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 636 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
637 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
638 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
639 | ||
640 | /* Properties handled by iterators. */ | |
641 | ||
642 | static struct props it_props[] = | |
5992c4f7 | 643 | { |
5f5c8ee5 GM |
644 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
645 | /* Handle `face' before `display' because some sub-properties of | |
646 | `display' need to know the face. */ | |
647 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
648 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
649 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 650 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
651 | {NULL, 0, NULL} |
652 | }; | |
5992c4f7 | 653 | |
5f5c8ee5 GM |
654 | /* Value is the position described by X. If X is a marker, value is |
655 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 656 | |
5f5c8ee5 | 657 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 658 | |
5f5c8ee5 | 659 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 660 | |
5f5c8ee5 GM |
661 | enum move_it_result |
662 | { | |
663 | /* Not used. Undefined value. */ | |
664 | MOVE_UNDEFINED, | |
bab29e15 | 665 | |
5f5c8ee5 GM |
666 | /* Move ended at the requested buffer position or ZV. */ |
667 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 668 | |
5f5c8ee5 GM |
669 | /* Move ended at the requested X pixel position. */ |
670 | MOVE_X_REACHED, | |
12adba34 | 671 | |
5f5c8ee5 GM |
672 | /* Move within a line ended at the end of a line that must be |
673 | continued. */ | |
674 | MOVE_LINE_CONTINUED, | |
675 | ||
676 | /* Move within a line ended at the end of a line that would | |
677 | be displayed truncated. */ | |
678 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 679 | |
5f5c8ee5 GM |
680 | /* Move within a line ended at a line end. */ |
681 | MOVE_NEWLINE_OR_CR | |
682 | }; | |
12adba34 | 683 | |
ff6c30e5 | 684 | |
5f5c8ee5 GM |
685 | \f |
686 | /* Function prototypes. */ | |
687 | ||
5a08cbaf | 688 | static void setup_for_ellipsis P_ ((struct it *)); |
43c09969 | 689 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
74bd6d65 GM |
690 | static int single_display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
691 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); | |
cafafe0b | 692 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 693 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 694 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
695 | |
696 | #if 0 | |
2e621225 | 697 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
698 | #endif |
699 | ||
2e621225 GM |
700 | static int next_element_from_ellipsis P_ ((struct it *)); |
701 | static void pint2str P_ ((char *, int, int)); | |
702 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
703 | struct text_pos)); | |
704 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
705 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
706 | static void store_frame_title_char P_ ((char)); | |
707 | static int store_frame_title P_ ((unsigned char *, int, int)); | |
708 | static void x_consider_frame_title P_ ((Lisp_Object)); | |
709 | static void handle_stop P_ ((struct it *)); | |
710 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 711 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 712 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
713 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
714 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 715 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
716 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
717 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 718 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
719 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
720 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
721 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 722 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
723 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
724 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 725 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 726 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
727 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
728 | struct text_pos)); | |
729 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 730 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 GM |
731 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
732 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
733 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 734 | static int append_space P_ ((struct it *, int)); |
cb617e7c | 735 | static int make_cursor_line_fully_visible P_ ((struct window *)); |
31ade731 | 736 | static int try_scrolling P_ ((Lisp_Object, int, EMACS_INT, EMACS_INT, int)); |
47589c8c | 737 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
738 | static int trailing_whitespace_p P_ ((int)); |
739 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
740 | static void push_it P_ ((struct it *)); |
741 | static void pop_it P_ ((struct it *)); | |
742 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
743 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 744 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
745 | static void redisplay_windows P_ ((Lisp_Object)); |
746 | static void redisplay_window P_ ((Lisp_Object, int)); | |
82a7ab23 RS |
747 | static Lisp_Object redisplay_window_error (); |
748 | static Lisp_Object redisplay_window_0 P_ ((Lisp_Object)); | |
749 | static Lisp_Object redisplay_window_1 P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
750 | static void update_menu_bar P_ ((struct frame *, int)); |
751 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
752 | static int try_window_id P_ ((struct window *)); | |
753 | static int display_line P_ ((struct it *)); | |
715e84c9 | 754 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 755 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
0fcf414f | 756 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object, Lisp_Object)); |
72f62cb5 | 757 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
758 | static void display_menu_bar P_ ((struct window *)); |
759 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
760 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
761 | int, int, struct it *, int, int, int, int)); | |
762 | static void compute_line_metrics P_ ((struct it *)); | |
763 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 764 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 765 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
766 | static void reseat P_ ((struct it *, struct text_pos, int)); |
767 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
768 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
769 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 770 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
771 | static int next_element_from_display_vector P_ ((struct it *)); |
772 | static int next_element_from_string P_ ((struct it *)); | |
773 | static int next_element_from_c_string P_ ((struct it *)); | |
774 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 775 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
776 | static int next_element_from_image P_ ((struct it *)); |
777 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 778 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
779 | static int init_from_display_pos P_ ((struct it *, struct window *, |
780 | struct display_pos *)); | |
5f5c8ee5 GM |
781 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
782 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
783 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
784 | int, int, int)); | |
785 | void move_it_vertically_backward P_ ((struct it *, int)); | |
786 | static void init_to_row_start P_ ((struct it *, struct window *, | |
787 | struct glyph_row *)); | |
47d57b22 GM |
788 | static int init_to_row_end P_ ((struct it *, struct window *, |
789 | struct glyph_row *)); | |
5f5c8ee5 | 790 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 791 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
792 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
793 | Lisp_Object, int)); | |
794 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
795 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
796 | static int number_of_chars P_ ((unsigned char *, int)); | |
797 | static void compute_stop_pos P_ ((struct it *)); | |
798 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
799 | Lisp_Object)); | |
800 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
801 | static int next_overlay_change P_ ((int)); | |
802 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
a61b7058 GM |
803 | Lisp_Object, struct text_pos *, |
804 | int)); | |
06a12811 | 805 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
806 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
807 | struct window *)); | |
5f5c8ee5 GM |
808 | |
809 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
810 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 811 | |
5f5c8ee5 | 812 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 813 | |
e037b9ec GM |
814 | static void update_tool_bar P_ ((struct frame *, int)); |
815 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
816 | static int redisplay_tool_bar P_ ((struct frame *)); | |
817 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 818 | |
5f5c8ee5 | 819 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 820 | |
5f5c8ee5 GM |
821 | \f |
822 | /*********************************************************************** | |
823 | Window display dimensions | |
824 | ***********************************************************************/ | |
12adba34 | 825 | |
5f5c8ee5 GM |
826 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
827 | text in window W. This is the height of W minus the height of a | |
828 | mode line, if any. */ | |
829 | ||
830 | INLINE int | |
831 | window_text_bottom_y (w) | |
832 | struct window *w; | |
833 | { | |
834 | struct frame *f = XFRAME (w->frame); | |
835 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
1a578e9b | 836 | |
5f5c8ee5 GM |
837 | if (WINDOW_WANTS_MODELINE_P (w)) |
838 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
839 | return height; | |
f88eb0b6 KH |
840 | } |
841 | ||
f82aff7c | 842 | |
5f5c8ee5 | 843 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 844 | means return the total width of W, not including fringes to |
5f5c8ee5 | 845 | the left and right of the window. */ |
ff6c30e5 | 846 | |
5f5c8ee5 GM |
847 | INLINE int |
848 | window_box_width (w, area) | |
849 | struct window *w; | |
850 | int area; | |
851 | { | |
852 | struct frame *f = XFRAME (w->frame); | |
853 | int width = XFASTINT (w->width); | |
854 | ||
855 | if (!w->pseudo_window_p) | |
ff6c30e5 | 856 | { |
b46952ae | 857 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FRINGE_COLS (f); |
5f5c8ee5 GM |
858 | |
859 | if (area == TEXT_AREA) | |
860 | { | |
861 | if (INTEGERP (w->left_margin_width)) | |
862 | width -= XFASTINT (w->left_margin_width); | |
863 | if (INTEGERP (w->right_margin_width)) | |
864 | width -= XFASTINT (w->right_margin_width); | |
865 | } | |
866 | else if (area == LEFT_MARGIN_AREA) | |
867 | width = (INTEGERP (w->left_margin_width) | |
868 | ? XFASTINT (w->left_margin_width) : 0); | |
869 | else if (area == RIGHT_MARGIN_AREA) | |
870 | width = (INTEGERP (w->right_margin_width) | |
871 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 872 | } |
5f5c8ee5 GM |
873 | |
874 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 875 | } |
1adc55de | 876 | |
1adc55de | 877 | |
5f5c8ee5 | 878 | /* Return the pixel height of the display area of window W, not |
4b41cebb | 879 | including mode lines of W, if any. */ |
f88eb0b6 | 880 | |
5f5c8ee5 GM |
881 | INLINE int |
882 | window_box_height (w) | |
883 | struct window *w; | |
f88eb0b6 | 884 | { |
5f5c8ee5 GM |
885 | struct frame *f = XFRAME (w->frame); |
886 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
7ecd4937 GM |
887 | |
888 | xassert (height >= 0); | |
5f5c8ee5 | 889 | |
d9c9e99c MB |
890 | /* Note: the code below that determines the mode-line/header-line |
891 | height is essentially the same as that contained in the macro | |
892 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
893 | the appropriate glyph row has its `mode_line_p' flag set, | |
894 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
895 | ||
5f5c8ee5 | 896 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
897 | { |
898 | struct glyph_row *ml_row | |
899 | = (w->current_matrix && w->current_matrix->rows | |
900 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
901 | : 0); | |
902 | if (ml_row && ml_row->mode_line_p) | |
903 | height -= ml_row->height; | |
904 | else | |
96d2320f | 905 | height -= estimate_mode_line_height (f, CURRENT_MODE_LINE_FACE_ID (w)); |
97dff879 | 906 | } |
5f5c8ee5 | 907 | |
045dee35 | 908 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
909 | { |
910 | struct glyph_row *hl_row | |
911 | = (w->current_matrix && w->current_matrix->rows | |
912 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
913 | : 0); | |
914 | if (hl_row && hl_row->mode_line_p) | |
915 | height -= hl_row->height; | |
916 | else | |
917 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
918 | } | |
5f5c8ee5 | 919 | |
7c75be36 PJ |
920 | /* With a very small font and a mode-line that's taller than |
921 | default, we might end up with a negative height. */ | |
922 | return max (0, height); | |
5992c4f7 KH |
923 | } |
924 | ||
925 | ||
5f5c8ee5 GM |
926 | /* Return the frame-relative coordinate of the left edge of display |
927 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 928 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 929 | |
5f5c8ee5 GM |
930 | INLINE int |
931 | window_box_left (w, area) | |
932 | struct window *w; | |
933 | int area; | |
90adcf20 | 934 | { |
5f5c8ee5 GM |
935 | struct frame *f = XFRAME (w->frame); |
936 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 937 | |
5f5c8ee5 | 938 | if (!w->pseudo_window_p) |
90adcf20 | 939 | { |
5f5c8ee5 | 940 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
b46952ae | 941 | + FRAME_LEFT_FRINGE_WIDTH (f)); |
5f5c8ee5 GM |
942 | |
943 | if (area == TEXT_AREA) | |
944 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
945 | else if (area == RIGHT_MARGIN_AREA) | |
946 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
947 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 948 | } |
73af359d | 949 | |
5f5c8ee5 GM |
950 | return x; |
951 | } | |
90adcf20 | 952 | |
b6436d4e | 953 | |
5f5c8ee5 GM |
954 | /* Return the frame-relative coordinate of the right edge of display |
955 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 956 | whole window, to the left of the right fringe of W. */ |
ded34426 | 957 | |
5f5c8ee5 GM |
958 | INLINE int |
959 | window_box_right (w, area) | |
960 | struct window *w; | |
961 | int area; | |
962 | { | |
963 | return window_box_left (w, area) + window_box_width (w, area); | |
964 | } | |
965 | ||
966 | ||
967 | /* Get the bounding box of the display area AREA of window W, without | |
968 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 969 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
970 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
971 | coordinates of the upper-left corner of the box. Return in | |
972 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
973 | ||
974 | INLINE void | |
975 | window_box (w, area, box_x, box_y, box_width, box_height) | |
976 | struct window *w; | |
977 | int area; | |
978 | int *box_x, *box_y, *box_width, *box_height; | |
979 | { | |
980 | struct frame *f = XFRAME (w->frame); | |
981 | ||
982 | *box_width = window_box_width (w, area); | |
983 | *box_height = window_box_height (w); | |
984 | *box_x = window_box_left (w, area); | |
985 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
986 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
987 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
988 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 989 | } |
1adc55de | 990 | |
1adc55de | 991 | |
5f5c8ee5 | 992 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
993 | mode lines. AREA < 0 means the whole window, not including the |
994 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
995 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
996 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
997 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
998 | box. */ | |
ded34426 | 999 | |
5f5c8ee5 GM |
1000 | INLINE void |
1001 | window_box_edges (w, area, top_left_x, top_left_y, | |
1002 | bottom_right_x, bottom_right_y) | |
1003 | struct window *w; | |
1004 | int area; | |
1005 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 1006 | { |
5f5c8ee5 GM |
1007 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
1008 | bottom_right_y); | |
1009 | *bottom_right_x += *top_left_x; | |
1010 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
1011 | } |
1012 | ||
5f5c8ee5 GM |
1013 | |
1014 | \f | |
1015 | /*********************************************************************** | |
1016 | Utilities | |
1017 | ***********************************************************************/ | |
1018 | ||
8b6ea97f GM |
1019 | /* Return the bottom y-position of the line the iterator IT is in. |
1020 | This can modify IT's settings. */ | |
1021 | ||
1022 | int | |
1023 | line_bottom_y (it) | |
1024 | struct it *it; | |
1025 | { | |
1026 | int line_height = it->max_ascent + it->max_descent; | |
1027 | int line_top_y = it->current_y; | |
1028 | ||
1029 | if (line_height == 0) | |
1030 | { | |
1031 | if (last_height) | |
1032 | line_height = last_height; | |
1033 | else if (IT_CHARPOS (*it) < ZV) | |
1034 | { | |
1035 | move_it_by_lines (it, 1, 1); | |
1036 | line_height = (it->max_ascent || it->max_descent | |
1037 | ? it->max_ascent + it->max_descent | |
1038 | : last_height); | |
1039 | } | |
1040 | else | |
1041 | { | |
1042 | struct glyph_row *row = it->glyph_row; | |
1043 | ||
1044 | /* Use the default character height. */ | |
1045 | it->glyph_row = NULL; | |
1046 | it->what = IT_CHARACTER; | |
1047 | it->c = ' '; | |
1048 | it->len = 1; | |
1049 | PRODUCE_GLYPHS (it); | |
1050 | line_height = it->ascent + it->descent; | |
1051 | it->glyph_row = row; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | return line_top_y + line_height; | |
1056 | } | |
1057 | ||
1058 | ||
0db95684 GM |
1059 | /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to |
1060 | 1 if POS is visible and the line containing POS is fully visible. | |
1061 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line | |
1062 | and header-lines heights. */ | |
3a641a69 GM |
1063 | |
1064 | int | |
04612a64 | 1065 | pos_visible_p (w, charpos, fully, exact_mode_line_heights_p) |
3a641a69 | 1066 | struct window *w; |
04612a64 | 1067 | int charpos, *fully, exact_mode_line_heights_p; |
3a641a69 GM |
1068 | { |
1069 | struct it it; | |
1070 | struct text_pos top; | |
fcab1954 GM |
1071 | int visible_p; |
1072 | struct buffer *old_buffer = NULL; | |
1073 | ||
1074 | if (XBUFFER (w->buffer) != current_buffer) | |
1075 | { | |
1076 | old_buffer = current_buffer; | |
1077 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1078 | } | |
3a641a69 GM |
1079 | |
1080 | *fully = visible_p = 0; | |
1081 | SET_TEXT_POS_FROM_MARKER (top, w->start); | |
04612a64 GM |
1082 | |
1083 | /* Compute exact mode line heights, if requested. */ | |
1084 | if (exact_mode_line_heights_p) | |
1085 | { | |
1086 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1087 | current_mode_line_height | |
96d2320f | 1088 | = display_mode_line (w, CURRENT_MODE_LINE_FACE_ID (w), |
04612a64 GM |
1089 | current_buffer->mode_line_format); |
1090 | ||
1091 | if (WINDOW_WANTS_HEADER_LINE_P (w)) | |
1092 | current_header_line_height | |
1093 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1094 | current_buffer->header_line_format); | |
1095 | } | |
3a641a69 | 1096 | |
04612a64 | 1097 | start_display (&it, w, top); |
3a641a69 GM |
1098 | move_it_to (&it, charpos, 0, it.last_visible_y, -1, |
1099 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
a13be207 GM |
1100 | |
1101 | /* Note that we may overshoot because of invisible text. */ | |
1102 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1103 | { |
8b6ea97f GM |
1104 | int top_y = it.current_y; |
1105 | int bottom_y = line_bottom_y (&it); | |
fcab1954 | 1106 | int window_top_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
3a641a69 | 1107 | |
8b6ea97f GM |
1108 | if (top_y < window_top_y) |
1109 | visible_p = bottom_y > window_top_y; | |
1110 | else if (top_y < it.last_visible_y) | |
fcab1954 GM |
1111 | { |
1112 | visible_p = 1; | |
8b6ea97f | 1113 | *fully = bottom_y <= it.last_visible_y; |
fcab1954 | 1114 | } |
3a641a69 GM |
1115 | } |
1116 | else if (it.current_y + it.max_ascent + it.max_descent > it.last_visible_y) | |
1117 | { | |
1118 | move_it_by_lines (&it, 1, 0); | |
1119 | if (charpos < IT_CHARPOS (it)) | |
1120 | { | |
1121 | visible_p = 1; | |
1122 | *fully = 0; | |
1123 | } | |
1124 | } | |
fcab1954 GM |
1125 | |
1126 | if (old_buffer) | |
1127 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1128 | |
1129 | current_header_line_height = current_mode_line_height = -1; | |
3a641a69 GM |
1130 | return visible_p; |
1131 | } | |
1132 | ||
1133 | ||
4fdb80f2 GM |
1134 | /* Return the next character from STR which is MAXLEN bytes long. |
1135 | Return in *LEN the length of the character. This is like | |
1136 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1137 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1138 | character. */ |
1139 | ||
1140 | static INLINE int | |
7a5b8a93 | 1141 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 1142 | unsigned char *str; |
7a5b8a93 | 1143 | int maxlen, *len; |
4fdb80f2 GM |
1144 | { |
1145 | int c; | |
1146 | ||
1147 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1148 | if (!CHAR_VALID_P (c, 1)) | |
1149 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1150 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1151 | characters. */ |
1152 | c = '?'; | |
1153 | ||
1154 | return c; | |
1155 | } | |
1156 | ||
1157 | ||
1158 | ||
5f5c8ee5 GM |
1159 | /* Given a position POS containing a valid character and byte position |
1160 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1161 | ||
1162 | static struct text_pos | |
1163 | string_pos_nchars_ahead (pos, string, nchars) | |
1164 | struct text_pos pos; | |
1165 | Lisp_Object string; | |
1166 | int nchars; | |
0b1005ef | 1167 | { |
5f5c8ee5 GM |
1168 | xassert (STRINGP (string) && nchars >= 0); |
1169 | ||
1170 | if (STRING_MULTIBYTE (string)) | |
1171 | { | |
1172 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
1173 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
1174 | int len; | |
1175 | ||
1176 | while (nchars--) | |
1177 | { | |
4fdb80f2 | 1178 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1179 | p += len, rest -= len; |
1180 | xassert (rest >= 0); | |
1181 | CHARPOS (pos) += 1; | |
1182 | BYTEPOS (pos) += len; | |
1183 | } | |
1184 | } | |
1185 | else | |
1186 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1187 | ||
1188 | return pos; | |
0a9dc68b RS |
1189 | } |
1190 | ||
0a9dc68b | 1191 | |
5f5c8ee5 GM |
1192 | /* Value is the text position, i.e. character and byte position, |
1193 | for character position CHARPOS in STRING. */ | |
1194 | ||
1195 | static INLINE struct text_pos | |
1196 | string_pos (charpos, string) | |
1197 | int charpos; | |
0a9dc68b | 1198 | Lisp_Object string; |
0a9dc68b | 1199 | { |
5f5c8ee5 GM |
1200 | struct text_pos pos; |
1201 | xassert (STRINGP (string)); | |
1202 | xassert (charpos >= 0); | |
1203 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1204 | return pos; | |
1205 | } | |
1206 | ||
1207 | ||
1208 | /* Value is a text position, i.e. character and byte position, for | |
1209 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1210 | means recognize multibyte characters. */ | |
1211 | ||
1212 | static struct text_pos | |
1213 | c_string_pos (charpos, s, multibyte_p) | |
1214 | int charpos; | |
1215 | unsigned char *s; | |
1216 | int multibyte_p; | |
1217 | { | |
1218 | struct text_pos pos; | |
1219 | ||
1220 | xassert (s != NULL); | |
1221 | xassert (charpos >= 0); | |
1222 | ||
1223 | if (multibyte_p) | |
0a9dc68b | 1224 | { |
5f5c8ee5 GM |
1225 | int rest = strlen (s), len; |
1226 | ||
1227 | SET_TEXT_POS (pos, 0, 0); | |
1228 | while (charpos--) | |
0a9dc68b | 1229 | { |
4fdb80f2 | 1230 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1231 | s += len, rest -= len; |
1232 | xassert (rest >= 0); | |
1233 | CHARPOS (pos) += 1; | |
1234 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1235 | } |
1236 | } | |
5f5c8ee5 GM |
1237 | else |
1238 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1239 | |
5f5c8ee5 GM |
1240 | return pos; |
1241 | } | |
0a9dc68b | 1242 | |
0a9dc68b | 1243 | |
5f5c8ee5 GM |
1244 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1245 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1246 | |
5f5c8ee5 GM |
1247 | static int |
1248 | number_of_chars (s, multibyte_p) | |
1249 | unsigned char *s; | |
1250 | int multibyte_p; | |
1251 | { | |
1252 | int nchars; | |
1253 | ||
1254 | if (multibyte_p) | |
1255 | { | |
1256 | int rest = strlen (s), len; | |
1257 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1258 | |
5f5c8ee5 GM |
1259 | for (nchars = 0; rest > 0; ++nchars) |
1260 | { | |
4fdb80f2 | 1261 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1262 | rest -= len, p += len; |
0a9dc68b RS |
1263 | } |
1264 | } | |
5f5c8ee5 GM |
1265 | else |
1266 | nchars = strlen (s); | |
1267 | ||
1268 | return nchars; | |
0b1005ef KH |
1269 | } |
1270 | ||
5f5c8ee5 GM |
1271 | |
1272 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1273 | NEWPOS->charpos. POS is a known position in string STRING. | |
1274 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1275 | |
5f5c8ee5 GM |
1276 | static void |
1277 | compute_string_pos (newpos, pos, string) | |
1278 | struct text_pos *newpos, pos; | |
1279 | Lisp_Object string; | |
76412d64 | 1280 | { |
5f5c8ee5 GM |
1281 | xassert (STRINGP (string)); |
1282 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1283 | ||
1284 | if (STRING_MULTIBYTE (string)) | |
6fc556fd KR |
1285 | *newpos = string_pos_nchars_ahead (pos, string, |
1286 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1287 | else |
1288 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1289 | } |
1290 | ||
9c74a0dd | 1291 | |
5f5c8ee5 GM |
1292 | \f |
1293 | /*********************************************************************** | |
1294 | Lisp form evaluation | |
1295 | ***********************************************************************/ | |
1296 | ||
116d6f5c | 1297 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
1298 | |
1299 | static Lisp_Object | |
116d6f5c | 1300 | safe_eval_handler (arg) |
5f5c8ee5 GM |
1301 | Lisp_Object arg; |
1302 | { | |
0dbf9fd2 | 1303 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
1304 | return Qnil; |
1305 | } | |
1306 | ||
1307 | ||
1308 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 1309 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 1310 | |
71e5b1b8 | 1311 | Lisp_Object |
116d6f5c | 1312 | safe_eval (sexpr) |
5f5c8ee5 GM |
1313 | Lisp_Object sexpr; |
1314 | { | |
5f5c8ee5 | 1315 | Lisp_Object val; |
30a3f61c GM |
1316 | |
1317 | if (inhibit_eval_during_redisplay) | |
1318 | val = Qnil; | |
1319 | else | |
1320 | { | |
1321 | int count = BINDING_STACK_SIZE (); | |
1322 | struct gcpro gcpro1; | |
0d8b31c0 | 1323 | |
30a3f61c GM |
1324 | GCPRO1 (sexpr); |
1325 | specbind (Qinhibit_redisplay, Qt); | |
1326 | val = internal_condition_case_1 (Feval, sexpr, Qerror, | |
1327 | safe_eval_handler); | |
1328 | UNGCPRO; | |
1329 | val = unbind_to (count, val); | |
1330 | } | |
1331 | ||
1332 | return val; | |
0d8b31c0 GM |
1333 | } |
1334 | ||
1335 | ||
1336 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
1337 | Return the result, or nil if something went wrong. Prevent |
1338 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
1339 | |
1340 | Lisp_Object | |
116d6f5c | 1341 | safe_call (nargs, args) |
0d8b31c0 GM |
1342 | int nargs; |
1343 | Lisp_Object *args; | |
1344 | { | |
0d8b31c0 | 1345 | Lisp_Object val; |
30a3f61c GM |
1346 | |
1347 | if (inhibit_eval_during_redisplay) | |
1348 | val = Qnil; | |
1349 | else | |
1350 | { | |
1351 | int count = BINDING_STACK_SIZE (); | |
1352 | struct gcpro gcpro1; | |
0d8b31c0 | 1353 | |
30a3f61c GM |
1354 | GCPRO1 (args[0]); |
1355 | gcpro1.nvars = nargs; | |
1356 | specbind (Qinhibit_redisplay, Qt); | |
1357 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qerror, | |
1358 | safe_eval_handler); | |
1359 | UNGCPRO; | |
1360 | val = unbind_to (count, val); | |
1361 | } | |
1362 | ||
1363 | return val; | |
5f5c8ee5 GM |
1364 | } |
1365 | ||
1366 | ||
116d6f5c GM |
1367 | /* Call function FN with one argument ARG. |
1368 | Return the result, or nil if something went wrong. */ | |
1369 | ||
1370 | Lisp_Object | |
1371 | safe_call1 (fn, arg) | |
1372 | Lisp_Object fn, arg; | |
1373 | { | |
1374 | Lisp_Object args[2]; | |
1375 | args[0] = fn; | |
1376 | args[1] = arg; | |
1377 | return safe_call (2, args); | |
1378 | } | |
1379 | ||
1380 | ||
5f5c8ee5 GM |
1381 | \f |
1382 | /*********************************************************************** | |
1383 | Debugging | |
1384 | ***********************************************************************/ | |
1385 | ||
1386 | #if 0 | |
1387 | ||
1388 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1389 | This is for debugging. It is too slow to do unconditionally. */ | |
1390 | ||
1391 | static void | |
1392 | check_it (it) | |
1393 | struct it *it; | |
1394 | { | |
1395 | if (it->method == next_element_from_string) | |
a2889657 | 1396 | { |
5f5c8ee5 GM |
1397 | xassert (STRINGP (it->string)); |
1398 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1399 | } | |
1400 | else if (it->method == next_element_from_buffer) | |
1401 | { | |
1402 | /* Check that character and byte positions agree. */ | |
1403 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1404 | } | |
73af359d | 1405 | |
5f5c8ee5 GM |
1406 | if (it->dpvec) |
1407 | xassert (it->current.dpvec_index >= 0); | |
1408 | else | |
1409 | xassert (it->current.dpvec_index < 0); | |
1410 | } | |
1f40cad2 | 1411 | |
5f5c8ee5 GM |
1412 | #define CHECK_IT(IT) check_it ((IT)) |
1413 | ||
1414 | #else /* not 0 */ | |
1415 | ||
1416 | #define CHECK_IT(IT) (void) 0 | |
1417 | ||
1418 | #endif /* not 0 */ | |
1419 | ||
1420 | ||
1421 | #if GLYPH_DEBUG | |
1422 | ||
1423 | /* Check that the window end of window W is what we expect it | |
1424 | to be---the last row in the current matrix displaying text. */ | |
1425 | ||
1426 | static void | |
1427 | check_window_end (w) | |
1428 | struct window *w; | |
1429 | { | |
1430 | if (!MINI_WINDOW_P (w) | |
1431 | && !NILP (w->window_end_valid)) | |
1432 | { | |
1433 | struct glyph_row *row; | |
1434 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1435 | XFASTINT (w->window_end_vpos)), | |
1436 | !row->enabled_p | |
1437 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1438 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1443 | ||
1444 | #else /* not GLYPH_DEBUG */ | |
1445 | ||
1446 | #define CHECK_WINDOW_END(W) (void) 0 | |
1447 | ||
1448 | #endif /* not GLYPH_DEBUG */ | |
1449 | ||
1450 | ||
1451 | \f | |
1452 | /*********************************************************************** | |
1453 | Iterator initialization | |
1454 | ***********************************************************************/ | |
1455 | ||
1456 | /* Initialize IT for displaying current_buffer in window W, starting | |
1457 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1458 | position is specified which is useful when the iterator is assigned | |
1459 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 1460 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
1461 | |
1462 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1463 | will produce glyphs in that row. | |
1464 | ||
1465 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
96d2320f KS |
1466 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID, |
1467 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID for displaying | |
1468 | mode lines, or TOOL_BAR_FACE_ID for displaying the tool-bar. | |
5f5c8ee5 | 1469 | |
96d2320f KS |
1470 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID, |
1471 | MODE_LINE_INACTIVE_FACE_ID, or HEADER_LINE_FACE_ID, the iterator | |
1472 | will be initialized to use the corresponding mode line glyph row of | |
1473 | the desired matrix of W. */ | |
5f5c8ee5 GM |
1474 | |
1475 | void | |
1476 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1477 | struct it *it; | |
1478 | struct window *w; | |
1479 | int charpos, bytepos; | |
1480 | struct glyph_row *row; | |
1481 | enum face_id base_face_id; | |
1482 | { | |
1483 | int highlight_region_p; | |
5f5c8ee5 GM |
1484 | |
1485 | /* Some precondition checks. */ | |
1486 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
1487 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
1488 | && charpos <= ZV)); | |
5f5c8ee5 GM |
1489 | |
1490 | /* If face attributes have been changed since the last redisplay, | |
1491 | free realized faces now because they depend on face definitions | |
1492 | that might have changed. */ | |
1493 | if (face_change_count) | |
1494 | { | |
1495 | face_change_count = 0; | |
1496 | free_all_realized_faces (Qnil); | |
1497 | } | |
1498 | ||
1499 | /* Use one of the mode line rows of W's desired matrix if | |
1500 | appropriate. */ | |
1501 | if (row == NULL) | |
1502 | { | |
96d2320f KS |
1503 | if (base_face_id == MODE_LINE_FACE_ID |
1504 | || base_face_id == MODE_LINE_INACTIVE_FACE_ID) | |
5f5c8ee5 | 1505 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); |
045dee35 GM |
1506 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1507 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1508 | } |
1509 | ||
1510 | /* Clear IT. */ | |
1511 | bzero (it, sizeof *it); | |
1512 | it->current.overlay_string_index = -1; | |
1513 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1514 | it->base_face_id = base_face_id; |
1515 | ||
1516 | /* The window in which we iterate over current_buffer: */ | |
1517 | XSETWINDOW (it->window, w); | |
1518 | it->w = w; | |
1519 | it->f = XFRAME (w->frame); | |
1520 | ||
d475bcb8 GM |
1521 | /* Extra space between lines (on window systems only). */ |
1522 | if (base_face_id == DEFAULT_FACE_ID | |
1523 | && FRAME_WINDOW_P (it->f)) | |
1524 | { | |
1525 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1526 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1527 | else if (it->f->extra_line_spacing > 0) | |
1528 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1529 | } | |
1530 | ||
5f5c8ee5 | 1531 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
1532 | attribute changes of named faces, recompute them. When running |
1533 | in batch mode, the face cache of Vterminal_frame is null. If | |
1534 | we happen to get called, make a dummy face cache. */ | |
9010e6b1 AI |
1535 | if ( |
1536 | #ifndef WINDOWSNT | |
1537 | noninteractive && | |
1538 | #endif | |
1539 | FRAME_FACE_CACHE (it->f) == NULL) | |
62be9979 | 1540 | init_frame_faces (it->f); |
5f5c8ee5 GM |
1541 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
1542 | recompute_basic_faces (it->f); | |
1543 | ||
5f5c8ee5 GM |
1544 | /* Current value of the `space-width', and 'height' properties. */ |
1545 | it->space_width = Qnil; | |
1546 | it->font_height = Qnil; | |
1547 | ||
1548 | /* Are control characters displayed as `^C'? */ | |
1549 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1550 | ||
1551 | /* -1 means everything between a CR and the following line end | |
1552 | is invisible. >0 means lines indented more than this value are | |
1553 | invisible. */ | |
1554 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1555 | ? XFASTINT (current_buffer->selective_display) | |
1556 | : (!NILP (current_buffer->selective_display) | |
1557 | ? -1 : 0)); | |
1558 | it->selective_display_ellipsis_p | |
1559 | = !NILP (current_buffer->selective_display_ellipses); | |
1560 | ||
1561 | /* Display table to use. */ | |
1562 | it->dp = window_display_table (w); | |
1563 | ||
1564 | /* Are multibyte characters enabled in current_buffer? */ | |
1565 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1566 | ||
1567 | /* Non-zero if we should highlight the region. */ | |
1568 | highlight_region_p | |
3ebf0ea9 | 1569 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
1570 | && !NILP (current_buffer->mark_active) |
1571 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1572 | ||
1573 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1574 | start and end of a visible region in window IT->w. Set both to | |
1575 | -1 to indicate no region. */ | |
1576 | if (highlight_region_p | |
1577 | /* Maybe highlight only in selected window. */ | |
1578 | && (/* Either show region everywhere. */ | |
1579 | highlight_nonselected_windows | |
1580 | /* Or show region in the selected window. */ | |
1581 | || w == XWINDOW (selected_window) | |
1582 | /* Or show the region if we are in the mini-buffer and W is | |
1583 | the window the mini-buffer refers to. */ | |
1584 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
5705966b KS |
1585 | && WINDOWP (minibuf_selected_window) |
1586 | && w == XWINDOW (minibuf_selected_window)))) | |
5f5c8ee5 GM |
1587 | { |
1588 | int charpos = marker_position (current_buffer->mark); | |
1589 | it->region_beg_charpos = min (PT, charpos); | |
1590 | it->region_end_charpos = max (PT, charpos); | |
1591 | } | |
1592 | else | |
1593 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1594 | ||
1595 | /* Get the position at which the redisplay_end_trigger hook should | |
1596 | be run, if it is to be run at all. */ | |
1597 | if (MARKERP (w->redisplay_end_trigger) | |
1598 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1599 | it->redisplay_end_trigger_charpos | |
1600 | = marker_position (w->redisplay_end_trigger); | |
1601 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1602 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1603 | ||
1604 | /* Correct bogus values of tab_width. */ | |
1605 | it->tab_width = XINT (current_buffer->tab_width); | |
1606 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1607 | it->tab_width = 8; | |
1608 | ||
1609 | /* Are lines in the display truncated? */ | |
1610 | it->truncate_lines_p | |
1611 | = (base_face_id != DEFAULT_FACE_ID | |
1612 | || XINT (it->w->hscroll) | |
1613 | || (truncate_partial_width_windows | |
1614 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1615 | || !NILP (current_buffer->truncate_lines)); | |
1616 | ||
1617 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 1618 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
1619 | frames. */ |
1620 | if (!FRAME_WINDOW_P (it->f)) | |
1621 | { | |
1622 | if (it->truncate_lines_p) | |
1623 | { | |
1624 | /* We will need the truncation glyph. */ | |
1625 | xassert (it->glyph_row == NULL); | |
1626 | produce_special_glyphs (it, IT_TRUNCATION); | |
1627 | it->truncation_pixel_width = it->pixel_width; | |
1628 | } | |
1629 | else | |
1630 | { | |
1631 | /* We will need the continuation glyph. */ | |
1632 | xassert (it->glyph_row == NULL); | |
1633 | produce_special_glyphs (it, IT_CONTINUATION); | |
1634 | it->continuation_pixel_width = it->pixel_width; | |
1635 | } | |
1636 | ||
153c2160 | 1637 | /* Reset these values to zero because the produce_special_glyphs |
5f5c8ee5 GM |
1638 | above has changed them. */ |
1639 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1640 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1641 | } |
1642 | ||
1643 | /* Set this after getting the dimensions of truncation and | |
1644 | continuation glyphs, so that we don't produce glyphs when calling | |
1645 | produce_special_glyphs, above. */ | |
1646 | it->glyph_row = row; | |
1647 | it->area = TEXT_AREA; | |
1648 | ||
1649 | /* Get the dimensions of the display area. The display area | |
1650 | consists of the visible window area plus a horizontally scrolled | |
1651 | part to the left of the window. All x-values are relative to the | |
1652 | start of this total display area. */ | |
1653 | if (base_face_id != DEFAULT_FACE_ID) | |
1654 | { | |
1655 | /* Mode lines, menu bar in terminal frames. */ | |
1656 | it->first_visible_x = 0; | |
1657 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | it->first_visible_x | |
1662 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1663 | it->last_visible_x = (it->first_visible_x | |
1664 | + window_box_width (w, TEXT_AREA)); | |
1665 | ||
1666 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1667 | the right margin. Otherwise, leave room for the continuation | |
1668 | glyph(s). Truncation and continuation glyphs are not inserted | |
1669 | for window-based redisplay. */ | |
1670 | if (!FRAME_WINDOW_P (it->f)) | |
1671 | { | |
1672 | if (it->truncate_lines_p) | |
1673 | it->last_visible_x -= it->truncation_pixel_width; | |
1674 | else | |
1675 | it->last_visible_x -= it->continuation_pixel_width; | |
1676 | } | |
1677 | ||
045dee35 GM |
1678 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1679 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1680 | } |
1681 | ||
1682 | /* Leave room for a border glyph. */ | |
1683 | if (!FRAME_WINDOW_P (it->f) | |
1684 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1685 | it->last_visible_x -= 1; | |
1686 | ||
1687 | it->last_visible_y = window_text_bottom_y (w); | |
1688 | ||
1689 | /* For mode lines and alike, arrange for the first glyph having a | |
1690 | left box line if the face specifies a box. */ | |
1691 | if (base_face_id != DEFAULT_FACE_ID) | |
1692 | { | |
1693 | struct face *face; | |
1694 | ||
1695 | it->face_id = base_face_id; | |
1696 | ||
1697 | /* If we have a boxed mode line, make the first character appear | |
1698 | with a left box line. */ | |
1699 | face = FACE_FROM_ID (it->f, base_face_id); | |
1700 | if (face->box != FACE_NO_BOX) | |
1701 | it->start_of_box_run_p = 1; | |
1702 | } | |
1703 | ||
1704 | /* If a buffer position was specified, set the iterator there, | |
1705 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 1706 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
1707 | { |
1708 | it->end_charpos = ZV; | |
1709 | it->face_id = -1; | |
1710 | IT_CHARPOS (*it) = charpos; | |
1711 | ||
1712 | /* Compute byte position if not specified. */ | |
3ebf0ea9 | 1713 | if (bytepos < charpos) |
5f5c8ee5 GM |
1714 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
1715 | else | |
1716 | IT_BYTEPOS (*it) = bytepos; | |
1717 | ||
1718 | /* Compute faces etc. */ | |
1719 | reseat (it, it->current.pos, 1); | |
1720 | } | |
1721 | ||
1722 | CHECK_IT (it); | |
1723 | } | |
1724 | ||
1725 | ||
1726 | /* Initialize IT for the display of window W with window start POS. */ | |
1727 | ||
1728 | void | |
1729 | start_display (it, w, pos) | |
1730 | struct it *it; | |
1731 | struct window *w; | |
1732 | struct text_pos pos; | |
1733 | { | |
5f5c8ee5 | 1734 | struct glyph_row *row; |
045dee35 | 1735 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1736 | |
1737 | row = w->desired_matrix->rows + first_vpos; | |
1738 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
17fdcfc8 GM |
1739 | |
1740 | if (!it->truncate_lines_p) | |
5f5c8ee5 | 1741 | { |
17fdcfc8 GM |
1742 | int start_at_line_beg_p; |
1743 | int first_y = it->current_y; | |
1744 | ||
1745 | /* If window start is not at a line start, skip forward to POS to | |
1746 | get the correct continuation lines width. */ | |
1747 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1748 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1749 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 1750 | { |
17fdcfc8 GM |
1751 | reseat_at_previous_visible_line_start (it); |
1752 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1753 | ||
1754 | /* If lines are continued, this line may end in the middle | |
1755 | of a multi-glyph character (e.g. a control character | |
1756 | displayed as \003, or in the middle of an overlay | |
1757 | string). In this case move_it_to above will not have | |
1758 | taken us to the start of the continuation line but to the | |
1759 | end of the continued line. */ | |
b28cb6ed | 1760 | if (it->current_x > 0) |
5f5c8ee5 | 1761 | { |
b28cb6ed GM |
1762 | if (it->current.dpvec_index >= 0 |
1763 | || it->current.overlay_string_index >= 0) | |
1764 | { | |
cafafe0b | 1765 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
1766 | move_it_in_display_line_to (it, -1, -1, 0); |
1767 | } | |
17fdcfc8 | 1768 | |
b28cb6ed | 1769 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 1770 | } |
b28cb6ed GM |
1771 | |
1772 | /* We're starting a new display line, not affected by the | |
1773 | height of the continued line, so clear the appropriate | |
1774 | fields in the iterator structure. */ | |
1775 | it->max_ascent = it->max_descent = 0; | |
1776 | it->max_phys_ascent = it->max_phys_descent = 0; | |
5f5c8ee5 | 1777 | |
17fdcfc8 GM |
1778 | it->current_y = first_y; |
1779 | it->vpos = 0; | |
1780 | it->current_x = it->hpos = 0; | |
1781 | } | |
5f5c8ee5 GM |
1782 | } |
1783 | ||
1784 | #if 0 /* Don't assert the following because start_display is sometimes | |
1785 | called intentionally with a window start that is not at a | |
1786 | line start. Please leave this code in as a comment. */ | |
1787 | ||
1788 | /* Window start should be on a line start, now. */ | |
1789 | xassert (it->continuation_lines_width | |
1790 | || IT_CHARPOS (it) == BEGV | |
1791 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1792 | #endif /* 0 */ | |
1793 | } | |
1794 | ||
1795 | ||
4bde0ebb GM |
1796 | /* Return 1 if POS is a position in ellipses displayed for invisible |
1797 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 1798 | |
4bde0ebb GM |
1799 | static int |
1800 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 1801 | struct display_pos *pos; |
4bde0ebb | 1802 | struct window *w; |
5f5c8ee5 | 1803 | { |
ac90c44f | 1804 | Lisp_Object prop, window; |
4bde0ebb GM |
1805 | int ellipses_p = 0; |
1806 | int charpos = CHARPOS (pos->pos); | |
ac90c44f GM |
1807 | |
1808 | /* If POS specifies a position in a display vector, this might | |
1809 | be for an ellipsis displayed for invisible text. We won't | |
1810 | get the iterator set up for delivering that ellipsis unless | |
1811 | we make sure that it gets aware of the invisible text. */ | |
1812 | if (pos->dpvec_index >= 0 | |
1813 | && pos->overlay_string_index < 0 | |
1814 | && CHARPOS (pos->string_pos) < 0 | |
1815 | && charpos > BEGV | |
1816 | && (XSETWINDOW (window, w), | |
1817 | prop = Fget_char_property (make_number (charpos), | |
1818 | Qinvisible, window), | |
20fbd925 | 1819 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
1820 | { |
1821 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
1822 | window); | |
8580a4e3 | 1823 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
1824 | } |
1825 | ||
1826 | return ellipses_p; | |
1827 | } | |
1828 | ||
1829 | ||
1830 | /* Initialize IT for stepping through current_buffer in window W, | |
1831 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
1832 | vector/ control character translation position information. Value |
1833 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 1834 | |
47d57b22 | 1835 | static int |
4bde0ebb GM |
1836 | init_from_display_pos (it, w, pos) |
1837 | struct it *it; | |
1838 | struct window *w; | |
1839 | struct display_pos *pos; | |
1840 | { | |
1841 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 1842 | int i, overlay_strings_with_newlines = 0; |
4bde0ebb GM |
1843 | |
1844 | /* If POS specifies a position in a display vector, this might | |
1845 | be for an ellipsis displayed for invisible text. We won't | |
1846 | get the iterator set up for delivering that ellipsis unless | |
1847 | we make sure that it gets aware of the invisible text. */ | |
1848 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
1849 | { | |
1850 | --charpos; | |
1851 | bytepos = 0; | |
ac90c44f GM |
1852 | } |
1853 | ||
5f5c8ee5 GM |
1854 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
1855 | text, so we might end up at a position different from POS. This | |
1856 | is only a problem when POS is a row start after a newline and an | |
1857 | overlay starts there with an after-string, and the overlay has an | |
1858 | invisible property. Since we don't skip invisible text in | |
1859 | display_line and elsewhere immediately after consuming the | |
1860 | newline before the row start, such a POS will not be in a string, | |
1861 | but the call to init_iterator below will move us to the | |
1862 | after-string. */ | |
ac90c44f | 1863 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 1864 | |
47d57b22 | 1865 | for (i = 0; i < it->n_overlay_strings; ++i) |
1e1e5daf GM |
1866 | { |
1867 | char *s = XSTRING (it->overlay_strings[i])->data; | |
1868 | char *e = s + STRING_BYTES (XSTRING (it->overlay_strings[i])); | |
1869 | ||
1870 | while (s < e && *s != '\n') | |
1871 | ++s; | |
1872 | ||
1873 | if (s < e) | |
1874 | { | |
1875 | overlay_strings_with_newlines = 1; | |
1876 | break; | |
1877 | } | |
1878 | } | |
47d57b22 | 1879 | |
75c5350a GM |
1880 | /* If position is within an overlay string, set up IT to the right |
1881 | overlay string. */ | |
5f5c8ee5 GM |
1882 | if (pos->overlay_string_index >= 0) |
1883 | { | |
1884 | int relative_index; | |
75c5350a GM |
1885 | |
1886 | /* If the first overlay string happens to have a `display' | |
1887 | property for an image, the iterator will be set up for that | |
1888 | image, and we have to undo that setup first before we can | |
1889 | correct the overlay string index. */ | |
1890 | if (it->method == next_element_from_image) | |
1891 | pop_it (it); | |
5f5c8ee5 GM |
1892 | |
1893 | /* We already have the first chunk of overlay strings in | |
1894 | IT->overlay_strings. Load more until the one for | |
1895 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1896 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1897 | { | |
1898 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1899 | it->current.overlay_string_index = 0; | |
1900 | while (n--) | |
1901 | { | |
5a08cbaf | 1902 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
1903 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
1904 | } | |
1905 | } | |
1906 | ||
1907 | it->current.overlay_string_index = pos->overlay_string_index; | |
1908 | relative_index = (it->current.overlay_string_index | |
1909 | % OVERLAY_STRING_CHUNK_SIZE); | |
1910 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 1911 | xassert (STRINGP (it->string)); |
5f5c8ee5 GM |
1912 | it->current.string_pos = pos->string_pos; |
1913 | it->method = next_element_from_string; | |
1914 | } | |
1e1e5daf GM |
1915 | |
1916 | #if 0 /* This is bogus because POS not having an overlay string | |
1917 | position does not mean it's after the string. Example: A | |
1918 | line starting with a before-string and initialization of IT | |
1919 | to the previous row's end position. */ | |
2be8f184 GM |
1920 | else if (it->current.overlay_string_index >= 0) |
1921 | { | |
1922 | /* If POS says we're already after an overlay string ending at | |
1923 | POS, make sure to pop the iterator because it will be in | |
1924 | front of that overlay string. When POS is ZV, we've thereby | |
1925 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
1926 | while (it->sp) |
1927 | pop_it (it); | |
2be8f184 GM |
1928 | it->current.overlay_string_index = -1; |
1929 | it->method = next_element_from_buffer; | |
1930 | if (CHARPOS (pos->pos) == ZV) | |
1931 | it->overlay_strings_at_end_processed_p = 1; | |
1932 | } | |
1e1e5daf | 1933 | #endif /* 0 */ |
2be8f184 GM |
1934 | |
1935 | if (CHARPOS (pos->string_pos) >= 0) | |
5f5c8ee5 GM |
1936 | { |
1937 | /* Recorded position is not in an overlay string, but in another | |
1938 | string. This can only be a string from a `display' property. | |
1939 | IT should already be filled with that string. */ | |
1940 | it->current.string_pos = pos->string_pos; | |
1941 | xassert (STRINGP (it->string)); | |
1942 | } | |
1943 | ||
ac90c44f GM |
1944 | /* Restore position in display vector translations, control |
1945 | character translations or ellipses. */ | |
5f5c8ee5 GM |
1946 | if (pos->dpvec_index >= 0) |
1947 | { | |
ac90c44f GM |
1948 | if (it->dpvec == NULL) |
1949 | get_next_display_element (it); | |
5f5c8ee5 GM |
1950 | xassert (it->dpvec && it->current.dpvec_index == 0); |
1951 | it->current.dpvec_index = pos->dpvec_index; | |
1952 | } | |
1953 | ||
1954 | CHECK_IT (it); | |
47d57b22 | 1955 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
1956 | } |
1957 | ||
1958 | ||
1959 | /* Initialize IT for stepping through current_buffer in window W | |
1960 | starting at ROW->start. */ | |
1961 | ||
1962 | static void | |
1963 | init_to_row_start (it, w, row) | |
1964 | struct it *it; | |
1965 | struct window *w; | |
1966 | struct glyph_row *row; | |
1967 | { | |
1968 | init_from_display_pos (it, w, &row->start); | |
1969 | it->continuation_lines_width = row->continuation_lines_width; | |
1970 | CHECK_IT (it); | |
1971 | } | |
1972 | ||
1973 | ||
1974 | /* Initialize IT for stepping through current_buffer in window W | |
47d57b22 GM |
1975 | starting in the line following ROW, i.e. starting at ROW->end. |
1976 | Value is zero if there are overlay strings with newlines at ROW's | |
1977 | end position. */ | |
5f5c8ee5 | 1978 | |
47d57b22 | 1979 | static int |
5f5c8ee5 GM |
1980 | init_to_row_end (it, w, row) |
1981 | struct it *it; | |
1982 | struct window *w; | |
1983 | struct glyph_row *row; | |
1984 | { | |
47d57b22 GM |
1985 | int success = 0; |
1986 | ||
1987 | if (init_from_display_pos (it, w, &row->end)) | |
1988 | { | |
1989 | if (row->continued_p) | |
1990 | it->continuation_lines_width | |
1991 | = row->continuation_lines_width + row->pixel_width; | |
1992 | CHECK_IT (it); | |
1993 | success = 1; | |
1994 | } | |
1995 | ||
1996 | return success; | |
5f5c8ee5 GM |
1997 | } |
1998 | ||
1999 | ||
2000 | ||
2001 | \f | |
2002 | /*********************************************************************** | |
2003 | Text properties | |
2004 | ***********************************************************************/ | |
2005 | ||
2006 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
2007 | overlay changes. Set IT->stop_charpos to the next position where | |
2008 | to stop. */ | |
2009 | ||
2010 | static void | |
2011 | handle_stop (it) | |
2012 | struct it *it; | |
2013 | { | |
2014 | enum prop_handled handled; | |
2015 | int handle_overlay_change_p = 1; | |
2016 | struct props *p; | |
2017 | ||
2018 | it->dpvec = NULL; | |
2019 | it->current.dpvec_index = -1; | |
2020 | ||
2021 | do | |
2022 | { | |
2023 | handled = HANDLED_NORMALLY; | |
2024 | ||
2025 | /* Call text property handlers. */ | |
2026 | for (p = it_props; p->handler; ++p) | |
2027 | { | |
2028 | handled = p->handler (it); | |
2970b9be | 2029 | |
5f5c8ee5 GM |
2030 | if (handled == HANDLED_RECOMPUTE_PROPS) |
2031 | break; | |
2032 | else if (handled == HANDLED_RETURN) | |
2033 | return; | |
2034 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
2035 | handle_overlay_change_p = 0; | |
2036 | } | |
2037 | ||
2038 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
2039 | { | |
2040 | /* Don't check for overlay strings below when set to deliver | |
2041 | characters from a display vector. */ | |
2042 | if (it->method == next_element_from_display_vector) | |
2043 | handle_overlay_change_p = 0; | |
2044 | ||
2045 | /* Handle overlay changes. */ | |
2046 | if (handle_overlay_change_p) | |
2047 | handled = handle_overlay_change (it); | |
2048 | ||
2049 | /* Determine where to stop next. */ | |
2050 | if (handled == HANDLED_NORMALLY) | |
2051 | compute_stop_pos (it); | |
2052 | } | |
2053 | } | |
2054 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
2055 | } | |
2056 | ||
2057 | ||
2058 | /* Compute IT->stop_charpos from text property and overlay change | |
2059 | information for IT's current position. */ | |
2060 | ||
2061 | static void | |
2062 | compute_stop_pos (it) | |
2063 | struct it *it; | |
2064 | { | |
2065 | register INTERVAL iv, next_iv; | |
2066 | Lisp_Object object, limit, position; | |
2067 | ||
2068 | /* If nowhere else, stop at the end. */ | |
2069 | it->stop_charpos = it->end_charpos; | |
2070 | ||
2071 | if (STRINGP (it->string)) | |
2072 | { | |
2073 | /* Strings are usually short, so don't limit the search for | |
2074 | properties. */ | |
2075 | object = it->string; | |
2076 | limit = Qnil; | |
ac90c44f | 2077 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2078 | } |
2079 | else | |
2080 | { | |
2081 | int charpos; | |
2082 | ||
2083 | /* If next overlay change is in front of the current stop pos | |
2084 | (which is IT->end_charpos), stop there. Note: value of | |
2085 | next_overlay_change is point-max if no overlay change | |
2086 | follows. */ | |
2087 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
2088 | if (charpos < it->stop_charpos) | |
2089 | it->stop_charpos = charpos; | |
2090 | ||
2091 | /* If showing the region, we have to stop at the region | |
2092 | start or end because the face might change there. */ | |
2093 | if (it->region_beg_charpos > 0) | |
2094 | { | |
2095 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
2096 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
2097 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
2098 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
2099 | } | |
2100 | ||
2101 | /* Set up variables for computing the stop position from text | |
2102 | property changes. */ | |
2103 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
2104 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
2105 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
2106 | |
2107 | } | |
2108 | ||
2109 | /* Get the interval containing IT's position. Value is a null | |
2110 | interval if there isn't such an interval. */ | |
2111 | iv = validate_interval_range (object, &position, &position, 0); | |
2112 | if (!NULL_INTERVAL_P (iv)) | |
2113 | { | |
2114 | Lisp_Object values_here[LAST_PROP_IDX]; | |
2115 | struct props *p; | |
2116 | ||
2117 | /* Get properties here. */ | |
2118 | for (p = it_props; p->handler; ++p) | |
2119 | values_here[p->idx] = textget (iv->plist, *p->name); | |
2120 | ||
2121 | /* Look for an interval following iv that has different | |
2122 | properties. */ | |
2123 | for (next_iv = next_interval (iv); | |
2124 | (!NULL_INTERVAL_P (next_iv) | |
2125 | && (NILP (limit) | |
2126 | || XFASTINT (limit) > next_iv->position)); | |
2127 | next_iv = next_interval (next_iv)) | |
2128 | { | |
2129 | for (p = it_props; p->handler; ++p) | |
2130 | { | |
2131 | Lisp_Object new_value; | |
2132 | ||
2133 | new_value = textget (next_iv->plist, *p->name); | |
2134 | if (!EQ (values_here[p->idx], new_value)) | |
2135 | break; | |
2136 | } | |
2137 | ||
2138 | if (p->handler) | |
2139 | break; | |
2140 | } | |
2141 | ||
2142 | if (!NULL_INTERVAL_P (next_iv)) | |
2143 | { | |
2144 | if (INTEGERP (limit) | |
2145 | && next_iv->position >= XFASTINT (limit)) | |
2146 | /* No text property change up to limit. */ | |
2147 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
2148 | else | |
2149 | /* Text properties change in next_iv. */ | |
2150 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | xassert (STRINGP (it->string) | |
2155 | || (it->stop_charpos >= BEGV | |
2156 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
2157 | } | |
2158 | ||
2159 | ||
2160 | /* Return the position of the next overlay change after POS in | |
2161 | current_buffer. Value is point-max if no overlay change | |
2162 | follows. This is like `next-overlay-change' but doesn't use | |
2163 | xmalloc. */ | |
2164 | ||
2165 | static int | |
2166 | next_overlay_change (pos) | |
2167 | int pos; | |
2168 | { | |
2169 | int noverlays; | |
2170 | int endpos; | |
2171 | Lisp_Object *overlays; | |
2172 | int len; | |
2173 | int i; | |
2174 | ||
2175 | /* Get all overlays at the given position. */ | |
2176 | len = 10; | |
2177 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2178 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2179 | if (noverlays > len) |
2180 | { | |
2181 | len = noverlays; | |
2182 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2183 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2184 | } |
2185 | ||
2186 | /* If any of these overlays ends before endpos, | |
2187 | use its ending point instead. */ | |
2188 | for (i = 0; i < noverlays; ++i) | |
2189 | { | |
2190 | Lisp_Object oend; | |
2191 | int oendpos; | |
2192 | ||
2193 | oend = OVERLAY_END (overlays[i]); | |
2194 | oendpos = OVERLAY_POSITION (oend); | |
2195 | endpos = min (endpos, oendpos); | |
2196 | } | |
2197 | ||
2198 | return endpos; | |
2199 | } | |
2200 | ||
2201 | ||
2202 | \f | |
2203 | /*********************************************************************** | |
2204 | Fontification | |
2205 | ***********************************************************************/ | |
2206 | ||
2207 | /* Handle changes in the `fontified' property of the current buffer by | |
2208 | calling hook functions from Qfontification_functions to fontify | |
2209 | regions of text. */ | |
2210 | ||
2211 | static enum prop_handled | |
2212 | handle_fontified_prop (it) | |
2213 | struct it *it; | |
2214 | { | |
2215 | Lisp_Object prop, pos; | |
2216 | enum prop_handled handled = HANDLED_NORMALLY; | |
2217 | ||
2218 | /* Get the value of the `fontified' property at IT's current buffer | |
2219 | position. (The `fontified' property doesn't have a special | |
2220 | meaning in strings.) If the value is nil, call functions from | |
2221 | Qfontification_functions. */ | |
2222 | if (!STRINGP (it->string) | |
2223 | && it->s == NULL | |
2224 | && !NILP (Vfontification_functions) | |
085536c2 | 2225 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
2226 | && (pos = make_number (IT_CHARPOS (*it)), |
2227 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
2228 | NILP (prop))) | |
2229 | { | |
2d27dae2 | 2230 | int count = BINDING_STACK_SIZE (); |
085536c2 GM |
2231 | Lisp_Object val; |
2232 | ||
2233 | val = Vfontification_functions; | |
2234 | specbind (Qfontification_functions, Qnil); | |
085536c2 GM |
2235 | |
2236 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
116d6f5c | 2237 | safe_call1 (val, pos); |
085536c2 GM |
2238 | else |
2239 | { | |
2240 | Lisp_Object globals, fn; | |
2241 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 2242 | |
085536c2 GM |
2243 | globals = Qnil; |
2244 | GCPRO2 (val, globals); | |
2245 | ||
2246 | for (; CONSP (val); val = XCDR (val)) | |
2247 | { | |
2248 | fn = XCAR (val); | |
2249 | ||
2250 | if (EQ (fn, Qt)) | |
2251 | { | |
2252 | /* A value of t indicates this hook has a local | |
2253 | binding; it means to run the global binding too. | |
2254 | In a global value, t should not occur. If it | |
2255 | does, we must ignore it to avoid an endless | |
2256 | loop. */ | |
2257 | for (globals = Fdefault_value (Qfontification_functions); | |
2258 | CONSP (globals); | |
2259 | globals = XCDR (globals)) | |
2260 | { | |
2261 | fn = XCAR (globals); | |
2262 | if (!EQ (fn, Qt)) | |
116d6f5c | 2263 | safe_call1 (fn, pos); |
085536c2 GM |
2264 | } |
2265 | } | |
2266 | else | |
116d6f5c | 2267 | safe_call1 (fn, pos); |
085536c2 GM |
2268 | } |
2269 | ||
2270 | UNGCPRO; | |
2271 | } | |
2272 | ||
2273 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2274 | |
2275 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
2276 | something. This avoids an endless loop if they failed to | |
2277 | fontify the text for which reason ever. */ | |
2278 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
2279 | handled = HANDLED_RECOMPUTE_PROPS; | |
2280 | } | |
2281 | ||
2282 | return handled; | |
2283 | } | |
2284 | ||
2285 | ||
2286 | \f | |
2287 | /*********************************************************************** | |
2288 | Faces | |
2289 | ***********************************************************************/ | |
2290 | ||
2291 | /* Set up iterator IT from face properties at its current position. | |
2292 | Called from handle_stop. */ | |
2293 | ||
2294 | static enum prop_handled | |
2295 | handle_face_prop (it) | |
2296 | struct it *it; | |
2297 | { | |
2298 | int new_face_id, next_stop; | |
2299 | ||
2300 | if (!STRINGP (it->string)) | |
2301 | { | |
2302 | new_face_id | |
2303 | = face_at_buffer_position (it->w, | |
2304 | IT_CHARPOS (*it), | |
2305 | it->region_beg_charpos, | |
2306 | it->region_end_charpos, | |
2307 | &next_stop, | |
2308 | (IT_CHARPOS (*it) | |
2309 | + TEXT_PROP_DISTANCE_LIMIT), | |
2310 | 0); | |
2311 | ||
2312 | /* Is this a start of a run of characters with box face? | |
2313 | Caveat: this can be called for a freshly initialized | |
4b41cebb | 2314 | iterator; face_id is -1 in this case. We know that the new |
5f5c8ee5 GM |
2315 | face will not change until limit, i.e. if the new face has a |
2316 | box, all characters up to limit will have one. But, as | |
2317 | usual, we don't know whether limit is really the end. */ | |
2318 | if (new_face_id != it->face_id) | |
2319 | { | |
2320 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2321 | ||
2322 | /* If new face has a box but old face has not, this is | |
2323 | the start of a run of characters with box, i.e. it has | |
2324 | a shadow on the left side. The value of face_id of the | |
2325 | iterator will be -1 if this is the initial call that gets | |
2326 | the face. In this case, we have to look in front of IT's | |
2327 | position and see whether there is a face != new_face_id. */ | |
2328 | it->start_of_box_run_p | |
2329 | = (new_face->box != FACE_NO_BOX | |
2330 | && (it->face_id >= 0 | |
2331 | || IT_CHARPOS (*it) == BEG | |
2332 | || new_face_id != face_before_it_pos (it))); | |
2333 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2334 | } | |
2335 | } | |
2336 | else | |
2337 | { | |
06a12811 GM |
2338 | int base_face_id, bufpos; |
2339 | ||
2340 | if (it->current.overlay_string_index >= 0) | |
2341 | bufpos = IT_CHARPOS (*it); | |
2342 | else | |
2343 | bufpos = 0; | |
2344 | ||
2345 | /* For strings from a buffer, i.e. overlay strings or strings | |
2346 | from a `display' property, use the face at IT's current | |
2347 | buffer position as the base face to merge with, so that | |
2348 | overlay strings appear in the same face as surrounding | |
2349 | text, unless they specify their own faces. */ | |
2350 | base_face_id = underlying_face_id (it); | |
2351 | ||
2352 | new_face_id = face_at_string_position (it->w, | |
2353 | it->string, | |
2354 | IT_STRING_CHARPOS (*it), | |
2355 | bufpos, | |
2356 | it->region_beg_charpos, | |
2357 | it->region_end_charpos, | |
2358 | &next_stop, | |
5de7c6f2 | 2359 | base_face_id, 0); |
5f5c8ee5 GM |
2360 | |
2361 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
2362 | /* If IT is used to display a mode line we would really like to | |
2363 | use the mode line face instead of the frame's default face. */ | |
2364 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2365 | && new_face_id == DEFAULT_FACE_ID) | |
96d2320f | 2366 | new_face_id = CURRENT_MODE_LINE_FACE_ID (it->w); |
5f5c8ee5 GM |
2367 | #endif |
2368 | ||
2369 | /* Is this a start of a run of characters with box? Caveat: | |
2370 | this can be called for a freshly allocated iterator; face_id | |
2371 | is -1 is this case. We know that the new face will not | |
2372 | change until the next check pos, i.e. if the new face has a | |
2373 | box, all characters up to that position will have a | |
2374 | box. But, as usual, we don't know whether that position | |
2375 | is really the end. */ | |
2376 | if (new_face_id != it->face_id) | |
2377 | { | |
2378 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2379 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2380 | ||
2381 | /* If new face has a box but old face hasn't, this is the | |
2382 | start of a run of characters with box, i.e. it has a | |
2383 | shadow on the left side. */ | |
2384 | it->start_of_box_run_p | |
2385 | = new_face->box && (old_face == NULL || !old_face->box); | |
2386 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2387 | } | |
2388 | } | |
2389 | ||
2390 | it->face_id = new_face_id; | |
5f5c8ee5 GM |
2391 | return HANDLED_NORMALLY; |
2392 | } | |
2393 | ||
2394 | ||
06a12811 GM |
2395 | /* Return the ID of the face ``underlying'' IT's current position, |
2396 | which is in a string. If the iterator is associated with a | |
2397 | buffer, return the face at IT's current buffer position. | |
2398 | Otherwise, use the iterator's base_face_id. */ | |
2399 | ||
2400 | static int | |
2401 | underlying_face_id (it) | |
2402 | struct it *it; | |
2403 | { | |
2404 | int face_id = it->base_face_id, i; | |
2405 | ||
2406 | xassert (STRINGP (it->string)); | |
2407 | ||
2408 | for (i = it->sp - 1; i >= 0; --i) | |
2409 | if (NILP (it->stack[i].string)) | |
2410 | face_id = it->stack[i].face_id; | |
2411 | ||
2412 | return face_id; | |
2413 | } | |
2414 | ||
2415 | ||
5f5c8ee5 GM |
2416 | /* Compute the face one character before or after the current position |
2417 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2418 | position. Value is the id of the face. */ | |
2419 | ||
2420 | static int | |
2421 | face_before_or_after_it_pos (it, before_p) | |
2422 | struct it *it; | |
2423 | int before_p; | |
2424 | { | |
2425 | int face_id, limit; | |
2426 | int next_check_charpos; | |
2427 | struct text_pos pos; | |
2428 | ||
2429 | xassert (it->s == NULL); | |
2430 | ||
2431 | if (STRINGP (it->string)) | |
2432 | { | |
06a12811 GM |
2433 | int bufpos, base_face_id; |
2434 | ||
5f5c8ee5 GM |
2435 | /* No face change past the end of the string (for the case |
2436 | we are padding with spaces). No face change before the | |
2437 | string start. */ | |
2438 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
2439 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
2440 | return it->face_id; | |
2441 | ||
2442 | /* Set pos to the position before or after IT's current position. */ | |
2443 | if (before_p) | |
2444 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2445 | else | |
260a86a0 KH |
2446 | /* For composition, we must check the character after the |
2447 | composition. */ | |
2448 | pos = (it->what == IT_COMPOSITION | |
2449 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2450 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 2451 | |
06a12811 GM |
2452 | if (it->current.overlay_string_index >= 0) |
2453 | bufpos = IT_CHARPOS (*it); | |
2454 | else | |
2455 | bufpos = 0; | |
2456 | ||
2457 | base_face_id = underlying_face_id (it); | |
2458 | ||
5f5c8ee5 | 2459 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
2460 | face_id = face_at_string_position (it->w, |
2461 | it->string, | |
2462 | CHARPOS (pos), | |
2463 | bufpos, | |
2464 | it->region_beg_charpos, | |
2465 | it->region_end_charpos, | |
2466 | &next_check_charpos, | |
5de7c6f2 | 2467 | base_face_id, 0); |
5f5c8ee5 GM |
2468 | |
2469 | /* Correct the face for charsets different from ASCII. Do it | |
2470 | for the multibyte case only. The face returned above is | |
2471 | suitable for unibyte text if IT->string is unibyte. */ | |
2472 | if (STRING_MULTIBYTE (it->string)) | |
2473 | { | |
2474 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
2475 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
980806b6 KH |
2476 | int c, len; |
2477 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
5f5c8ee5 | 2478 | |
4fdb80f2 | 2479 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2480 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2481 | } |
2482 | } | |
2483 | else | |
2484 | { | |
70851746 GM |
2485 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2486 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2487 | return it->face_id; | |
2488 | ||
5f5c8ee5 GM |
2489 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2490 | pos = it->current.pos; | |
2491 | ||
2492 | if (before_p) | |
c1005d06 | 2493 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2494 | else |
260a86a0 KH |
2495 | { |
2496 | if (it->what == IT_COMPOSITION) | |
2497 | /* For composition, we must check the position after the | |
2498 | composition. */ | |
2499 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2500 | else | |
c1005d06 | 2501 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2502 | } |
06a12811 | 2503 | |
5f5c8ee5 GM |
2504 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2505 | face_id = face_at_buffer_position (it->w, | |
2506 | CHARPOS (pos), | |
2507 | it->region_beg_charpos, | |
2508 | it->region_end_charpos, | |
2509 | &next_check_charpos, | |
2510 | limit, 0); | |
2511 | ||
2512 | /* Correct the face for charsets different from ASCII. Do it | |
2513 | for the multibyte case only. The face returned above is | |
2514 | suitable for unibyte text if current_buffer is unibyte. */ | |
2515 | if (it->multibyte_p) | |
2516 | { | |
980806b6 KH |
2517 | int c = FETCH_MULTIBYTE_CHAR (CHARPOS (pos)); |
2518 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2519 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2520 | } |
2521 | } | |
2522 | ||
2523 | return face_id; | |
2524 | } | |
2525 | ||
2526 | ||
2527 | \f | |
2528 | /*********************************************************************** | |
2529 | Invisible text | |
2530 | ***********************************************************************/ | |
2531 | ||
2532 | /* Set up iterator IT from invisible properties at its current | |
2533 | position. Called from handle_stop. */ | |
2534 | ||
2535 | static enum prop_handled | |
2536 | handle_invisible_prop (it) | |
2537 | struct it *it; | |
2538 | { | |
2539 | enum prop_handled handled = HANDLED_NORMALLY; | |
2540 | ||
2541 | if (STRINGP (it->string)) | |
2542 | { | |
2543 | extern Lisp_Object Qinvisible; | |
2544 | Lisp_Object prop, end_charpos, limit, charpos; | |
2545 | ||
2546 | /* Get the value of the invisible text property at the | |
2547 | current position. Value will be nil if there is no such | |
2548 | property. */ | |
ac90c44f | 2549 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2550 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
2551 | ||
eadc0bf8 GM |
2552 | if (!NILP (prop) |
2553 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2554 | { |
2555 | handled = HANDLED_RECOMPUTE_PROPS; | |
2556 | ||
2557 | /* Get the position at which the next change of the | |
2558 | invisible text property can be found in IT->string. | |
2559 | Value will be nil if the property value is the same for | |
2560 | all the rest of IT->string. */ | |
2561 | XSETINT (limit, XSTRING (it->string)->size); | |
2562 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2563 | it->string, limit); | |
2564 | ||
2565 | /* Text at current position is invisible. The next | |
2566 | change in the property is at position end_charpos. | |
2567 | Move IT's current position to that position. */ | |
2568 | if (INTEGERP (end_charpos) | |
2569 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2570 | { | |
2571 | struct text_pos old; | |
2572 | old = it->current.string_pos; | |
2573 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2574 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2575 | } | |
2576 | else | |
2577 | { | |
2578 | /* The rest of the string is invisible. If this is an | |
2579 | overlay string, proceed with the next overlay string | |
2580 | or whatever comes and return a character from there. */ | |
2581 | if (it->current.overlay_string_index >= 0) | |
2582 | { | |
2583 | next_overlay_string (it); | |
2584 | /* Don't check for overlay strings when we just | |
2585 | finished processing them. */ | |
2586 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2587 | } | |
2588 | else | |
2589 | { | |
2590 | struct Lisp_String *s = XSTRING (it->string); | |
2591 | IT_STRING_CHARPOS (*it) = s->size; | |
2592 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2593 | } | |
2594 | } | |
2595 | } | |
2596 | } | |
2597 | else | |
2598 | { | |
8580a4e3 | 2599 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 2600 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
2601 | |
2602 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 2603 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 2604 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
2605 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
2606 | &overlay); | |
8580a4e3 SM |
2607 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
2608 | ||
5f5c8ee5 | 2609 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 2610 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
2611 | { |
2612 | /* Record whether we have to display an ellipsis for the | |
2613 | invisible text. */ | |
8580a4e3 | 2614 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
2615 | |
2616 | handled = HANDLED_RECOMPUTE_PROPS; | |
2617 | ||
2618 | /* Loop skipping over invisible text. The loop is left at | |
2619 | ZV or with IT on the first char being visible again. */ | |
2620 | do | |
2621 | { | |
2622 | /* Try to skip some invisible text. Return value is the | |
2623 | position reached which can be equal to IT's position | |
2624 | if there is nothing invisible here. This skips both | |
2625 | over invisible text properties and overlays with | |
2626 | invisible property. */ | |
2627 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2628 | &next_stop, ZV, it->window); | |
2629 | ||
2630 | /* If we skipped nothing at all we weren't at invisible | |
2631 | text in the first place. If everything to the end of | |
2632 | the buffer was skipped, end the loop. */ | |
2633 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 2634 | invis_p = 0; |
5f5c8ee5 GM |
2635 | else |
2636 | { | |
2637 | /* We skipped some characters but not necessarily | |
2638 | all there are. Check if we ended up on visible | |
2639 | text. Fget_char_property returns the property of | |
2640 | the char before the given position, i.e. if we | |
8580a4e3 | 2641 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 2642 | newpos is visible. */ |
ac90c44f | 2643 | pos = make_number (newpos); |
5f5c8ee5 | 2644 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 2645 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 GM |
2646 | } |
2647 | ||
2648 | /* If we ended up on invisible text, proceed to | |
2649 | skip starting with next_stop. */ | |
8580a4e3 | 2650 | if (invis_p) |
5f5c8ee5 GM |
2651 | IT_CHARPOS (*it) = next_stop; |
2652 | } | |
8580a4e3 | 2653 | while (invis_p); |
5a08cbaf | 2654 | |
5f5c8ee5 GM |
2655 | /* The position newpos is now either ZV or on visible text. */ |
2656 | IT_CHARPOS (*it) = newpos; | |
2657 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2658 | ||
5a08cbaf GM |
2659 | /* If there are before-strings at the start of invisible |
2660 | text, and the text is invisible because of a text | |
2661 | property, arrange to show before-strings because 20.x did | |
2662 | it that way. (If the text is invisible because of an | |
2663 | overlay property instead of a text property, this is | |
2664 | already handled in the overlay code.) */ | |
2665 | if (NILP (overlay) | |
2666 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 2667 | { |
5a08cbaf GM |
2668 | handled = HANDLED_RECOMPUTE_PROPS; |
2669 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 2670 | } |
5a08cbaf GM |
2671 | else if (display_ellipsis_p) |
2672 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
2673 | } |
2674 | } | |
2675 | ||
2676 | return handled; | |
2677 | } | |
2678 | ||
2679 | ||
5a08cbaf GM |
2680 | /* Make iterator IT return `...' next. */ |
2681 | ||
2682 | static void | |
2683 | setup_for_ellipsis (it) | |
2684 | struct it *it; | |
2685 | { | |
2686 | if (it->dp | |
2687 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2688 | { | |
2689 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2690 | it->dpvec = v->contents; | |
2691 | it->dpend = v->contents + v->size; | |
2692 | } | |
2693 | else | |
2694 | { | |
2695 | /* Default `...'. */ | |
2696 | it->dpvec = default_invis_vector; | |
2697 | it->dpend = default_invis_vector + 3; | |
2698 | } | |
2699 | ||
2700 | /* The ellipsis display does not replace the display of the | |
2701 | character at the new position. Indicate this by setting | |
2702 | IT->dpvec_char_len to zero. */ | |
2703 | it->dpvec_char_len = 0; | |
2704 | ||
2705 | it->current.dpvec_index = 0; | |
2706 | it->method = next_element_from_display_vector; | |
2707 | } | |
2708 | ||
2709 | ||
5f5c8ee5 GM |
2710 | \f |
2711 | /*********************************************************************** | |
2712 | 'display' property | |
2713 | ***********************************************************************/ | |
2714 | ||
2715 | /* Set up iterator IT from `display' property at its current position. | |
2716 | Called from handle_stop. */ | |
2717 | ||
2718 | static enum prop_handled | |
2719 | handle_display_prop (it) | |
2720 | struct it *it; | |
2721 | { | |
2722 | Lisp_Object prop, object; | |
2723 | struct text_pos *position; | |
a61b7058 | 2724 | int display_replaced_p = 0; |
5f5c8ee5 GM |
2725 | |
2726 | if (STRINGP (it->string)) | |
2727 | { | |
2728 | object = it->string; | |
2729 | position = &it->current.string_pos; | |
2730 | } | |
2731 | else | |
2732 | { | |
221dd3e7 | 2733 | object = it->w->buffer; |
5f5c8ee5 GM |
2734 | position = &it->current.pos; |
2735 | } | |
2736 | ||
2737 | /* Reset those iterator values set from display property values. */ | |
2738 | it->font_height = Qnil; | |
2739 | it->space_width = Qnil; | |
2740 | it->voffset = 0; | |
2741 | ||
2742 | /* We don't support recursive `display' properties, i.e. string | |
2743 | values that have a string `display' property, that have a string | |
2744 | `display' property etc. */ | |
2745 | if (!it->string_from_display_prop_p) | |
2746 | it->area = TEXT_AREA; | |
2747 | ||
2748 | prop = Fget_char_property (make_number (position->charpos), | |
2749 | Qdisplay, object); | |
2750 | if (NILP (prop)) | |
2751 | return HANDLED_NORMALLY; | |
2752 | ||
f3751a65 | 2753 | if (CONSP (prop) |
12700f40 GM |
2754 | /* Simple properties. */ |
2755 | && !EQ (XCAR (prop), Qimage) | |
2756 | && !EQ (XCAR (prop), Qspace) | |
2757 | && !EQ (XCAR (prop), Qwhen) | |
2758 | && !EQ (XCAR (prop), Qspace_width) | |
2759 | && !EQ (XCAR (prop), Qheight) | |
2760 | && !EQ (XCAR (prop), Qraise) | |
2761 | /* Marginal area specifications. */ | |
2762 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
2763 | && !NILP (XCAR (prop))) | |
5f5c8ee5 | 2764 | { |
a61b7058 | 2765 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 2766 | { |
a61b7058 GM |
2767 | if (handle_single_display_prop (it, XCAR (prop), object, |
2768 | position, display_replaced_p)) | |
2769 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2770 | } |
2771 | } | |
2772 | else if (VECTORP (prop)) | |
2773 | { | |
2774 | int i; | |
a61b7058 GM |
2775 | for (i = 0; i < ASIZE (prop); ++i) |
2776 | if (handle_single_display_prop (it, AREF (prop, i), object, | |
2777 | position, display_replaced_p)) | |
2778 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2779 | } |
2780 | else | |
2781 | { | |
a61b7058 GM |
2782 | if (handle_single_display_prop (it, prop, object, position, 0)) |
2783 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2784 | } |
2785 | ||
a61b7058 | 2786 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
2787 | } |
2788 | ||
2789 | ||
6c577098 | 2790 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2791 | at START_POS in OBJECT. */ |
2792 | ||
2793 | static struct text_pos | |
2794 | display_prop_end (it, object, start_pos) | |
2795 | struct it *it; | |
2796 | Lisp_Object object; | |
2797 | struct text_pos start_pos; | |
2798 | { | |
2799 | Lisp_Object end; | |
2800 | struct text_pos end_pos; | |
5f5c8ee5 | 2801 | |
016b5642 MB |
2802 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
2803 | Qdisplay, object, Qnil); | |
6c577098 GM |
2804 | CHARPOS (end_pos) = XFASTINT (end); |
2805 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2806 | compute_string_pos (&end_pos, start_pos, it->string); |
2807 | else | |
6c577098 | 2808 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2809 | |
2810 | return end_pos; | |
2811 | } | |
2812 | ||
2813 | ||
2814 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2815 | is the object in which the `display' property was found. *POSITION | |
a61b7058 GM |
2816 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
2817 | means that we previously saw a display sub-property which already | |
2818 | replaced text display with something else, for example an image; | |
2819 | ignore such properties after the first one has been processed. | |
5f5c8ee5 GM |
2820 | |
2821 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2822 | end position of the `display' property. | |
2823 | ||
4b41cebb | 2824 | Value is non-zero if something was found which replaces the display |
a61b7058 | 2825 | of buffer or string text. */ |
5f5c8ee5 GM |
2826 | |
2827 | static int | |
a61b7058 GM |
2828 | handle_single_display_prop (it, prop, object, position, |
2829 | display_replaced_before_p) | |
5f5c8ee5 GM |
2830 | struct it *it; |
2831 | Lisp_Object prop; | |
2832 | Lisp_Object object; | |
2833 | struct text_pos *position; | |
a61b7058 | 2834 | int display_replaced_before_p; |
5f5c8ee5 GM |
2835 | { |
2836 | Lisp_Object value; | |
a61b7058 | 2837 | int replaces_text_display_p = 0; |
5f5c8ee5 GM |
2838 | Lisp_Object form; |
2839 | ||
d3acf96b | 2840 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
4b41cebb | 2841 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2842 | form = Qt; |
d3acf96b | 2843 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2844 | { |
2845 | prop = XCDR (prop); | |
2846 | if (!CONSP (prop)) | |
2847 | return 0; | |
2848 | form = XCAR (prop); | |
2849 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2850 | } |
2851 | ||
2852 | if (!NILP (form) && !EQ (form, Qt)) | |
2853 | { | |
b384d6f8 | 2854 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 | 2855 | struct gcpro gcpro1; |
5f5c8ee5 | 2856 | |
b384d6f8 GM |
2857 | /* Bind `object' to the object having the `display' property, a |
2858 | buffer or string. Bind `position' to the position in the | |
2859 | object where the property was found, and `buffer-position' | |
2860 | to the current position in the buffer. */ | |
2861 | specbind (Qobject, object); | |
31ac723b SM |
2862 | specbind (Qposition, make_number (CHARPOS (*position))); |
2863 | specbind (Qbuffer_position, | |
2864 | make_number (STRINGP (object) | |
2865 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 2866 | GCPRO1 (form); |
116d6f5c | 2867 | form = safe_eval (form); |
b384d6f8 GM |
2868 | UNGCPRO; |
2869 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2870 | } |
2871 | ||
2872 | if (NILP (form)) | |
2873 | return 0; | |
2874 | ||
2875 | if (CONSP (prop) | |
2876 | && EQ (XCAR (prop), Qheight) | |
2877 | && CONSP (XCDR (prop))) | |
2878 | { | |
e4093f38 | 2879 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 GM |
2880 | return 0; |
2881 | ||
2882 | /* `(height HEIGHT)'. */ | |
2883 | it->font_height = XCAR (XCDR (prop)); | |
2884 | if (!NILP (it->font_height)) | |
2885 | { | |
2886 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2887 | int new_height = -1; | |
2888 | ||
2889 | if (CONSP (it->font_height) | |
2890 | && (EQ (XCAR (it->font_height), Qplus) | |
2891 | || EQ (XCAR (it->font_height), Qminus)) | |
2892 | && CONSP (XCDR (it->font_height)) | |
2893 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2894 | { | |
2895 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2896 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2897 | if (EQ (XCAR (it->font_height), Qplus)) | |
2898 | steps = - steps; | |
2899 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2900 | } | |
0d8b31c0 | 2901 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
2902 | { |
2903 | /* Call function with current height as argument. | |
2904 | Value is the new height. */ | |
116d6f5c GM |
2905 | Lisp_Object height; |
2906 | height = safe_call1 (it->font_height, | |
2907 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
2908 | if (NUMBERP (height)) |
2909 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
2910 | } |
2911 | else if (NUMBERP (it->font_height)) | |
2912 | { | |
2913 | /* Value is a multiple of the canonical char height. */ | |
2914 | struct face *face; | |
2915 | ||
2916 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2917 | new_height = (XFLOATINT (it->font_height) | |
2918 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2919 | } | |
2920 | else | |
2921 | { | |
2922 | /* Evaluate IT->font_height with `height' bound to the | |
2923 | current specified height to get the new height. */ | |
2924 | Lisp_Object value; | |
2d27dae2 | 2925 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 GM |
2926 | |
2927 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
116d6f5c | 2928 | value = safe_eval (it->font_height); |
5f5c8ee5 GM |
2929 | unbind_to (count, Qnil); |
2930 | ||
2931 | if (NUMBERP (value)) | |
2932 | new_height = XFLOATINT (value); | |
2933 | } | |
2934 | ||
2935 | if (new_height > 0) | |
2936 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2937 | } | |
2938 | } | |
2939 | else if (CONSP (prop) | |
2940 | && EQ (XCAR (prop), Qspace_width) | |
2941 | && CONSP (XCDR (prop))) | |
2942 | { | |
2943 | /* `(space_width WIDTH)'. */ | |
e4093f38 | 2944 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 2945 | return 0; |
5f5c8ee5 GM |
2946 | |
2947 | value = XCAR (XCDR (prop)); | |
2948 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2949 | it->space_width = value; | |
2950 | } | |
2951 | else if (CONSP (prop) | |
2952 | && EQ (XCAR (prop), Qraise) | |
2953 | && CONSP (XCDR (prop))) | |
2954 | { | |
5f5c8ee5 | 2955 | /* `(raise FACTOR)'. */ |
e4093f38 | 2956 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 2957 | return 0; |
5f5c8ee5 | 2958 | |
fb3842a8 | 2959 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
2960 | value = XCAR (XCDR (prop)); |
2961 | if (NUMBERP (value)) | |
2962 | { | |
2963 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2964 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 2965 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
2966 | } |
2967 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2968 | } | |
2969 | else if (!it->string_from_display_prop_p) | |
2970 | { | |
f3751a65 | 2971 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
4b41cebb | 2972 | VALUE) or `((margin nil) VALUE)' or VALUE. */ |
5f5c8ee5 GM |
2973 | Lisp_Object location, value; |
2974 | struct text_pos start_pos; | |
2975 | int valid_p; | |
2976 | ||
2977 | /* Characters having this form of property are not displayed, so | |
2978 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
2979 | start_pos = *position; |
2980 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 2981 | value = Qnil; |
5f5c8ee5 GM |
2982 | |
2983 | /* Let's stop at the new position and assume that all | |
2984 | text properties change there. */ | |
2985 | it->stop_charpos = position->charpos; | |
2986 | ||
f3751a65 GM |
2987 | location = Qunbound; |
2988 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 2989 | { |
f3751a65 GM |
2990 | Lisp_Object tem; |
2991 | ||
5f5c8ee5 | 2992 | value = XCDR (prop); |
f3751a65 GM |
2993 | if (CONSP (value)) |
2994 | value = XCAR (value); | |
2995 | ||
2996 | tem = XCAR (prop); | |
2997 | if (EQ (XCAR (tem), Qmargin) | |
2998 | && (tem = XCDR (tem), | |
2999 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
3000 | (NILP (tem) | |
3001 | || EQ (tem, Qleft_margin) | |
3002 | || EQ (tem, Qright_margin)))) | |
3003 | location = tem; | |
5f5c8ee5 | 3004 | } |
f3751a65 GM |
3005 | |
3006 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
3007 | { |
3008 | location = Qnil; | |
3009 | value = prop; | |
3010 | } | |
3011 | ||
3012 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 3013 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
3014 | valid_p = STRINGP (value); |
3015 | else | |
3016 | valid_p = (STRINGP (value) | |
3017 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3018 | || valid_image_p (value)); | |
3019 | #else /* not HAVE_WINDOW_SYSTEM */ | |
3020 | valid_p = STRINGP (value); | |
3021 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
3022 | ||
3023 | if ((EQ (location, Qleft_margin) | |
3024 | || EQ (location, Qright_margin) | |
3025 | || NILP (location)) | |
a61b7058 GM |
3026 | && valid_p |
3027 | && !display_replaced_before_p) | |
5f5c8ee5 | 3028 | { |
a61b7058 | 3029 | replaces_text_display_p = 1; |
a21a3943 | 3030 | |
5f5c8ee5 GM |
3031 | /* Save current settings of IT so that we can restore them |
3032 | when we are finished with the glyph property value. */ | |
3033 | push_it (it); | |
3034 | ||
3035 | if (NILP (location)) | |
3036 | it->area = TEXT_AREA; | |
3037 | else if (EQ (location, Qleft_margin)) | |
3038 | it->area = LEFT_MARGIN_AREA; | |
3039 | else | |
3040 | it->area = RIGHT_MARGIN_AREA; | |
3041 | ||
3042 | if (STRINGP (value)) | |
3043 | { | |
3044 | it->string = value; | |
3045 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3046 | it->current.overlay_string_index = -1; | |
3047 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
3048 | it->end_charpos = it->string_nchars | |
3049 | = XSTRING (it->string)->size; | |
3050 | it->method = next_element_from_string; | |
3051 | it->stop_charpos = 0; | |
3052 | it->string_from_display_prop_p = 1; | |
e187cf71 GM |
3053 | /* Say that we haven't consumed the characters with |
3054 | `display' property yet. The call to pop_it in | |
3055 | set_iterator_to_next will clean this up. */ | |
3056 | *position = start_pos; | |
5f5c8ee5 GM |
3057 | } |
3058 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3059 | { | |
3060 | it->method = next_element_from_stretch; | |
3061 | it->object = value; | |
3062 | it->current.pos = it->position = start_pos; | |
3063 | } | |
3064 | #ifdef HAVE_WINDOW_SYSTEM | |
3065 | else | |
3066 | { | |
3067 | it->what = IT_IMAGE; | |
3068 | it->image_id = lookup_image (it->f, value); | |
3069 | it->position = start_pos; | |
3070 | it->object = NILP (object) ? it->w->buffer : object; | |
3071 | it->method = next_element_from_image; | |
3072 | ||
02513cdd | 3073 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
3074 | `display' property yet. The call to pop_it in |
3075 | set_iterator_to_next will clean this up. */ | |
3076 | *position = start_pos; | |
3077 | } | |
3078 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3079 | } | |
a21a3943 GM |
3080 | else |
3081 | /* Invalid property or property not supported. Restore | |
3082 | the position to what it was before. */ | |
3083 | *position = start_pos; | |
5f5c8ee5 GM |
3084 | } |
3085 | ||
a61b7058 | 3086 | return replaces_text_display_p; |
5f5c8ee5 GM |
3087 | } |
3088 | ||
3089 | ||
06568bbf GM |
3090 | /* Check if PROP is a display sub-property value whose text should be |
3091 | treated as intangible. */ | |
3092 | ||
3093 | static int | |
3094 | single_display_prop_intangible_p (prop) | |
3095 | Lisp_Object prop; | |
3096 | { | |
3097 | /* Skip over `when FORM'. */ | |
3098 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3099 | { | |
3100 | prop = XCDR (prop); | |
3101 | if (!CONSP (prop)) | |
3102 | return 0; | |
3103 | prop = XCDR (prop); | |
3104 | } | |
3105 | ||
3106 | if (!CONSP (prop)) | |
3107 | return 0; | |
3108 | ||
3109 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
3110 | we don't need to treat text as intangible. */ | |
3111 | if (EQ (XCAR (prop), Qmargin)) | |
3112 | { | |
3113 | prop = XCDR (prop); | |
3114 | if (!CONSP (prop)) | |
3115 | return 0; | |
3116 | ||
3117 | prop = XCDR (prop); | |
3118 | if (!CONSP (prop) | |
3119 | || EQ (XCAR (prop), Qleft_margin) | |
3120 | || EQ (XCAR (prop), Qright_margin)) | |
3121 | return 0; | |
3122 | } | |
3123 | ||
3124 | return CONSP (prop) && EQ (XCAR (prop), Qimage); | |
3125 | } | |
3126 | ||
3127 | ||
3128 | /* Check if PROP is a display property value whose text should be | |
3129 | treated as intangible. */ | |
3130 | ||
3131 | int | |
3132 | display_prop_intangible_p (prop) | |
3133 | Lisp_Object prop; | |
3134 | { | |
3135 | if (CONSP (prop) | |
3136 | && CONSP (XCAR (prop)) | |
3137 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3138 | { | |
3139 | /* A list of sub-properties. */ | |
3140 | while (CONSP (prop)) | |
3141 | { | |
3142 | if (single_display_prop_intangible_p (XCAR (prop))) | |
3143 | return 1; | |
3144 | prop = XCDR (prop); | |
3145 | } | |
3146 | } | |
3147 | else if (VECTORP (prop)) | |
3148 | { | |
3149 | /* A vector of sub-properties. */ | |
3150 | int i; | |
a61b7058 GM |
3151 | for (i = 0; i < ASIZE (prop); ++i) |
3152 | if (single_display_prop_intangible_p (AREF (prop, i))) | |
06568bbf GM |
3153 | return 1; |
3154 | } | |
3155 | else | |
3156 | return single_display_prop_intangible_p (prop); | |
3157 | ||
3158 | return 0; | |
3159 | } | |
3160 | ||
74bd6d65 GM |
3161 | |
3162 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
3163 | ||
3164 | static int | |
3165 | single_display_prop_string_p (prop, string) | |
3166 | Lisp_Object prop, string; | |
3167 | { | |
74bd6d65 GM |
3168 | if (EQ (string, prop)) |
3169 | return 1; | |
3170 | ||
3171 | /* Skip over `when FORM'. */ | |
3172 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3173 | { | |
3174 | prop = XCDR (prop); | |
3175 | if (!CONSP (prop)) | |
3176 | return 0; | |
3177 | prop = XCDR (prop); | |
3178 | } | |
3179 | ||
3180 | if (CONSP (prop)) | |
3181 | /* Skip over `margin LOCATION'. */ | |
3182 | if (EQ (XCAR (prop), Qmargin)) | |
3183 | { | |
3184 | prop = XCDR (prop); | |
3185 | if (!CONSP (prop)) | |
3186 | return 0; | |
3187 | ||
3188 | prop = XCDR (prop); | |
3189 | if (!CONSP (prop)) | |
3190 | return 0; | |
3191 | } | |
3192 | ||
3193 | return CONSP (prop) && EQ (XCAR (prop), string); | |
3194 | } | |
3195 | ||
3196 | ||
3197 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
3198 | ||
3199 | static int | |
3200 | display_prop_string_p (prop, string) | |
3201 | Lisp_Object prop, string; | |
3202 | { | |
74bd6d65 GM |
3203 | if (CONSP (prop) |
3204 | && CONSP (XCAR (prop)) | |
3205 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3206 | { | |
3207 | /* A list of sub-properties. */ | |
3208 | while (CONSP (prop)) | |
3209 | { | |
3210 | if (single_display_prop_string_p (XCAR (prop), string)) | |
3211 | return 1; | |
3212 | prop = XCDR (prop); | |
3213 | } | |
3214 | } | |
3215 | else if (VECTORP (prop)) | |
3216 | { | |
3217 | /* A vector of sub-properties. */ | |
3218 | int i; | |
3219 | for (i = 0; i < ASIZE (prop); ++i) | |
3220 | if (single_display_prop_string_p (AREF (prop, i), string)) | |
3221 | return 1; | |
3222 | } | |
3223 | else | |
3224 | return single_display_prop_string_p (prop, string); | |
3225 | ||
3226 | return 0; | |
3227 | } | |
3228 | ||
3229 | ||
3230 | /* Determine from which buffer position in W's buffer STRING comes | |
3231 | from. AROUND_CHARPOS is an approximate position where it could | |
3232 | be from. Value is the buffer position or 0 if it couldn't be | |
3233 | determined. | |
3234 | ||
3235 | W's buffer must be current. | |
3236 | ||
3237 | This function is necessary because we don't record buffer positions | |
3238 | in glyphs generated from strings (to keep struct glyph small). | |
3239 | This function may only use code that doesn't eval because it is | |
3240 | called asynchronously from note_mouse_highlight. */ | |
3241 | ||
3242 | int | |
3243 | string_buffer_position (w, string, around_charpos) | |
3244 | struct window *w; | |
3245 | Lisp_Object string; | |
3246 | int around_charpos; | |
3247 | { | |
74bd6d65 GM |
3248 | Lisp_Object limit, prop, pos; |
3249 | const int MAX_DISTANCE = 1000; | |
3250 | int found = 0; | |
3251 | ||
d8731202 | 3252 | pos = make_number (around_charpos); |
74bd6d65 GM |
3253 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
3254 | while (!found && !EQ (pos, limit)) | |
3255 | { | |
3256 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3257 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3258 | found = 1; | |
3259 | else | |
134d9283 | 3260 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
3261 | } |
3262 | ||
3263 | if (!found) | |
3264 | { | |
d8731202 | 3265 | pos = make_number (around_charpos); |
74bd6d65 GM |
3266 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
3267 | while (!found && !EQ (pos, limit)) | |
3268 | { | |
3269 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3270 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3271 | found = 1; | |
3272 | else | |
134d9283 GM |
3273 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
3274 | limit); | |
74bd6d65 GM |
3275 | } |
3276 | } | |
3277 | ||
3278 | return found ? XINT (pos) : 0; | |
3279 | } | |
3280 | ||
3281 | ||
5f5c8ee5 | 3282 | \f |
260a86a0 KH |
3283 | /*********************************************************************** |
3284 | `composition' property | |
3285 | ***********************************************************************/ | |
3286 | ||
3287 | /* Set up iterator IT from `composition' property at its current | |
3288 | position. Called from handle_stop. */ | |
3289 | ||
3290 | static enum prop_handled | |
3291 | handle_composition_prop (it) | |
3292 | struct it *it; | |
3293 | { | |
3294 | Lisp_Object prop, string; | |
3295 | int pos, pos_byte, end; | |
3296 | enum prop_handled handled = HANDLED_NORMALLY; | |
3297 | ||
3298 | if (STRINGP (it->string)) | |
3299 | { | |
3300 | pos = IT_STRING_CHARPOS (*it); | |
3301 | pos_byte = IT_STRING_BYTEPOS (*it); | |
3302 | string = it->string; | |
3303 | } | |
3304 | else | |
3305 | { | |
3306 | pos = IT_CHARPOS (*it); | |
3307 | pos_byte = IT_BYTEPOS (*it); | |
3308 | string = Qnil; | |
3309 | } | |
3310 | ||
3311 | /* If there's a valid composition and point is not inside of the | |
3312 | composition (in the case that the composition is from the current | |
3313 | buffer), draw a glyph composed from the composition components. */ | |
3314 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
3315 | && COMPOSITION_VALID_P (pos, end, prop) | |
3316 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
3317 | { | |
3318 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
3319 | ||
3320 | if (id >= 0) | |
3321 | { | |
3322 | it->method = next_element_from_composition; | |
3323 | it->cmp_id = id; | |
3324 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
3325 | /* For a terminal, draw only the first character of the | |
3326 | components. */ | |
3327 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
3328 | it->len = (STRINGP (it->string) | |
3329 | ? string_char_to_byte (it->string, end) | |
3330 | : CHAR_TO_BYTE (end)) - pos_byte; | |
3331 | it->stop_charpos = end; | |
3332 | handled = HANDLED_RETURN; | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | return handled; | |
3337 | } | |
3338 | ||
3339 | ||
3340 | \f | |
5f5c8ee5 GM |
3341 | /*********************************************************************** |
3342 | Overlay strings | |
3343 | ***********************************************************************/ | |
3344 | ||
3345 | /* The following structure is used to record overlay strings for | |
3346 | later sorting in load_overlay_strings. */ | |
3347 | ||
3348 | struct overlay_entry | |
3349 | { | |
2970b9be | 3350 | Lisp_Object overlay; |
5f5c8ee5 GM |
3351 | Lisp_Object string; |
3352 | int priority; | |
3353 | int after_string_p; | |
3354 | }; | |
3355 | ||
3356 | ||
3357 | /* Set up iterator IT from overlay strings at its current position. | |
3358 | Called from handle_stop. */ | |
3359 | ||
3360 | static enum prop_handled | |
3361 | handle_overlay_change (it) | |
3362 | struct it *it; | |
3363 | { | |
5a08cbaf | 3364 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 3365 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 3366 | else |
2970b9be | 3367 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
3368 | } |
3369 | ||
3370 | ||
3371 | /* Set up the next overlay string for delivery by IT, if there is an | |
3372 | overlay string to deliver. Called by set_iterator_to_next when the | |
3373 | end of the current overlay string is reached. If there are more | |
3374 | overlay strings to display, IT->string and | |
3375 | IT->current.overlay_string_index are set appropriately here. | |
3376 | Otherwise IT->string is set to nil. */ | |
3377 | ||
3378 | static void | |
3379 | next_overlay_string (it) | |
3380 | struct it *it; | |
3381 | { | |
3382 | ++it->current.overlay_string_index; | |
3383 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
3384 | { | |
3385 | /* No more overlay strings. Restore IT's settings to what | |
3386 | they were before overlay strings were processed, and | |
3387 | continue to deliver from current_buffer. */ | |
5a08cbaf GM |
3388 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
3389 | ||
5f5c8ee5 GM |
3390 | pop_it (it); |
3391 | xassert (it->stop_charpos >= BEGV | |
3392 | && it->stop_charpos <= it->end_charpos); | |
3393 | it->string = Qnil; | |
3394 | it->current.overlay_string_index = -1; | |
3395 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
3396 | it->n_overlay_strings = 0; | |
3397 | it->method = next_element_from_buffer; | |
2970b9be GM |
3398 | |
3399 | /* If we're at the end of the buffer, record that we have | |
3400 | processed the overlay strings there already, so that | |
3401 | next_element_from_buffer doesn't try it again. */ | |
3402 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3403 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
3404 | |
3405 | /* If we have to display `...' for invisible text, set | |
3406 | the iterator up for that. */ | |
3407 | if (display_ellipsis_p) | |
3408 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3409 | } |
3410 | else | |
3411 | { | |
3412 | /* There are more overlay strings to process. If | |
3413 | IT->current.overlay_string_index has advanced to a position | |
3414 | where we must load IT->overlay_strings with more strings, do | |
3415 | it. */ | |
3416 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
3417 | ||
3418 | if (it->current.overlay_string_index && i == 0) | |
5a08cbaf | 3419 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
3420 | |
3421 | /* Initialize IT to deliver display elements from the overlay | |
3422 | string. */ | |
3423 | it->string = it->overlay_strings[i]; | |
3424 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3425 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
3426 | it->method = next_element_from_string; | |
3427 | it->stop_charpos = 0; | |
3428 | } | |
3429 | ||
3430 | CHECK_IT (it); | |
3431 | } | |
3432 | ||
3433 | ||
3434 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
3435 | comparison function for qsort in load_overlay_strings. Overlay | |
3436 | strings for the same position are sorted so that | |
3437 | ||
2970b9be GM |
3438 | 1. All after-strings come in front of before-strings, except |
3439 | when they come from the same overlay. | |
5f5c8ee5 GM |
3440 | |
3441 | 2. Within after-strings, strings are sorted so that overlay strings | |
3442 | from overlays with higher priorities come first. | |
3443 | ||
3444 | 2. Within before-strings, strings are sorted so that overlay | |
3445 | strings from overlays with higher priorities come last. | |
3446 | ||
3447 | Value is analogous to strcmp. */ | |
3448 | ||
3449 | ||
3450 | static int | |
3451 | compare_overlay_entries (e1, e2) | |
3452 | void *e1, *e2; | |
3453 | { | |
3454 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
3455 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
3456 | int result; | |
3457 | ||
3458 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
3459 | { |
3460 | /* Let after-strings appear in front of before-strings if | |
3461 | they come from different overlays. */ | |
3462 | if (EQ (entry1->overlay, entry2->overlay)) | |
3463 | result = entry1->after_string_p ? 1 : -1; | |
3464 | else | |
3465 | result = entry1->after_string_p ? -1 : 1; | |
3466 | } | |
5f5c8ee5 GM |
3467 | else if (entry1->after_string_p) |
3468 | /* After-strings sorted in order of decreasing priority. */ | |
3469 | result = entry2->priority - entry1->priority; | |
3470 | else | |
3471 | /* Before-strings sorted in order of increasing priority. */ | |
3472 | result = entry1->priority - entry2->priority; | |
3473 | ||
3474 | return result; | |
3475 | } | |
3476 | ||
3477 | ||
3478 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
3479 | current buffer position, or from CHARPOS if that is > 0. Set |
3480 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
3481 | |
3482 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
3483 | a time. On entry into load_overlay_strings, | |
3484 | IT->current.overlay_string_index gives the number of overlay | |
3485 | strings that have already been loaded by previous calls to this | |
3486 | function. | |
3487 | ||
2970b9be GM |
3488 | IT->add_overlay_start contains an additional overlay start |
3489 | position to consider for taking overlay strings from, if non-zero. | |
3490 | This position comes into play when the overlay has an `invisible' | |
3491 | property, and both before and after-strings. When we've skipped to | |
3492 | the end of the overlay, because of its `invisible' property, we | |
3493 | nevertheless want its before-string to appear. | |
3494 | IT->add_overlay_start will contain the overlay start position | |
3495 | in this case. | |
3496 | ||
5f5c8ee5 GM |
3497 | Overlay strings are sorted so that after-string strings come in |
3498 | front of before-string strings. Within before and after-strings, | |
3499 | strings are sorted by overlay priority. See also function | |
3500 | compare_overlay_entries. */ | |
3501 | ||
3502 | static void | |
5a08cbaf | 3503 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 3504 | struct it *it; |
5a08cbaf | 3505 | int charpos; |
5f5c8ee5 GM |
3506 | { |
3507 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
cafafe0b | 3508 | Lisp_Object ov, overlay, window, str, invisible; |
5f5c8ee5 GM |
3509 | int start, end; |
3510 | int size = 20; | |
cafafe0b | 3511 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
3512 | struct overlay_entry *entries |
3513 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
3514 | |
3515 | if (charpos <= 0) | |
3516 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
3517 | |
3518 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
3519 | `entries' which has size `size' and currently contains `n' | |
3520 | elements. AFTER_P non-zero means STRING is an after-string of | |
3521 | OVERLAY. */ | |
3522 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
3523 | do \ | |
3524 | { \ | |
3525 | Lisp_Object priority; \ | |
3526 | \ | |
3527 | if (n == size) \ | |
3528 | { \ | |
3529 | int new_size = 2 * size; \ | |
3530 | struct overlay_entry *old = entries; \ | |
3531 | entries = \ | |
3532 | (struct overlay_entry *) alloca (new_size \ | |
3533 | * sizeof *entries); \ | |
3534 | bcopy (old, entries, size * sizeof *entries); \ | |
3535 | size = new_size; \ | |
3536 | } \ | |
3537 | \ | |
3538 | entries[n].string = (STRING); \ | |
2970b9be | 3539 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 3540 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 3541 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
3542 | entries[n].after_string_p = (AFTER_P); \ |
3543 | ++n; \ | |
3544 | } \ | |
3545 | while (0) | |
3546 | ||
3547 | /* Process overlay before the overlay center. */ | |
2970b9be | 3548 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3549 | { |
9472f927 | 3550 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3551 | xassert (OVERLAYP (overlay)); |
3552 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3553 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3554 | ||
cafafe0b | 3555 | if (end < charpos) |
5f5c8ee5 GM |
3556 | break; |
3557 | ||
3558 | /* Skip this overlay if it doesn't start or end at IT's current | |
3559 | position. */ | |
cafafe0b | 3560 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3561 | continue; |
3562 | ||
3563 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3564 | window = Foverlay_get (overlay, Qwindow); | |
3565 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3566 | continue; | |
3567 | ||
cafafe0b GM |
3568 | /* If the text ``under'' the overlay is invisible, both before- |
3569 | and after-strings from this overlay are visible; start and | |
3570 | end position are indistinguishable. */ | |
3571 | invisible = Foverlay_get (overlay, Qinvisible); | |
3572 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3573 | ||
5f5c8ee5 | 3574 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3575 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 GM |
3576 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
3577 | && XSTRING (str)->size) | |
3578 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
3579 | ||
3580 | /* If overlay has a non-empty after-string, record it. */ | |
cafafe0b | 3581 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 GM |
3582 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
3583 | && XSTRING (str)->size) | |
3584 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
3585 | } | |
3586 | ||
3587 | /* Process overlays after the overlay center. */ | |
2970b9be | 3588 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3589 | { |
9472f927 | 3590 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3591 | xassert (OVERLAYP (overlay)); |
3592 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3593 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3594 | ||
cafafe0b | 3595 | if (start > charpos) |
5f5c8ee5 GM |
3596 | break; |
3597 | ||
3598 | /* Skip this overlay if it doesn't start or end at IT's current | |
3599 | position. */ | |
cafafe0b | 3600 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3601 | continue; |
3602 | ||
3603 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3604 | window = Foverlay_get (overlay, Qwindow); | |
3605 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3606 | continue; | |
3607 | ||
cafafe0b GM |
3608 | /* If the text ``under'' the overlay is invisible, it has a zero |
3609 | dimension, and both before- and after-strings apply. */ | |
3610 | invisible = Foverlay_get (overlay, Qinvisible); | |
3611 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3612 | ||
5f5c8ee5 | 3613 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3614 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 GM |
3615 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
3616 | && XSTRING (str)->size) | |
3617 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
3618 | ||
3619 | /* If overlay has a non-empty after-string, record it. */ | |
cafafe0b | 3620 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 GM |
3621 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
3622 | && XSTRING (str)->size) | |
3623 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
3624 | } | |
3625 | ||
3626 | #undef RECORD_OVERLAY_STRING | |
3627 | ||
3628 | /* Sort entries. */ | |
cafafe0b | 3629 | if (n > 1) |
2970b9be | 3630 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
3631 | |
3632 | /* Record the total number of strings to process. */ | |
3633 | it->n_overlay_strings = n; | |
3634 | ||
3635 | /* IT->current.overlay_string_index is the number of overlay strings | |
3636 | that have already been consumed by IT. Copy some of the | |
3637 | remaining overlay strings to IT->overlay_strings. */ | |
3638 | i = 0; | |
3639 | j = it->current.overlay_string_index; | |
3640 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
3641 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 3642 | |
5f5c8ee5 GM |
3643 | CHECK_IT (it); |
3644 | } | |
3645 | ||
3646 | ||
3647 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
3648 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
3649 | least one overlay string was found. */ | |
5f5c8ee5 GM |
3650 | |
3651 | static int | |
5a08cbaf | 3652 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 3653 | struct it *it; |
5a08cbaf | 3654 | int charpos; |
5f5c8ee5 GM |
3655 | { |
3656 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
3657 | process. This fills IT->overlay_strings with strings, and sets | |
3658 | IT->n_overlay_strings to the total number of strings to process. | |
3659 | IT->pos.overlay_string_index has to be set temporarily to zero | |
3660 | because load_overlay_strings needs this; it must be set to -1 | |
3661 | when no overlay strings are found because a zero value would | |
3662 | indicate a position in the first overlay string. */ | |
3663 | it->current.overlay_string_index = 0; | |
5a08cbaf | 3664 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
3665 | |
3666 | /* If we found overlay strings, set up IT to deliver display | |
3667 | elements from the first one. Otherwise set up IT to deliver | |
3668 | from current_buffer. */ | |
3669 | if (it->n_overlay_strings) | |
3670 | { | |
3671 | /* Make sure we know settings in current_buffer, so that we can | |
3672 | restore meaningful values when we're done with the overlay | |
3673 | strings. */ | |
3674 | compute_stop_pos (it); | |
3675 | xassert (it->face_id >= 0); | |
3676 | ||
3677 | /* Save IT's settings. They are restored after all overlay | |
3678 | strings have been processed. */ | |
3679 | xassert (it->sp == 0); | |
3680 | push_it (it); | |
3681 | ||
3682 | /* Set up IT to deliver display elements from the first overlay | |
3683 | string. */ | |
3684 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 3685 | it->string = it->overlay_strings[0]; |
b2046df8 GM |
3686 | it->stop_charpos = 0; |
3687 | it->end_charpos = XSTRING (it->string)->size; | |
5f5c8ee5 GM |
3688 | it->multibyte_p = STRING_MULTIBYTE (it->string); |
3689 | xassert (STRINGP (it->string)); | |
3690 | it->method = next_element_from_string; | |
3691 | } | |
3692 | else | |
3693 | { | |
3694 | it->string = Qnil; | |
3695 | it->current.overlay_string_index = -1; | |
3696 | it->method = next_element_from_buffer; | |
3697 | } | |
3698 | ||
3699 | CHECK_IT (it); | |
3700 | ||
3701 | /* Value is non-zero if we found at least one overlay string. */ | |
3702 | return STRINGP (it->string); | |
3703 | } | |
3704 | ||
3705 | ||
3706 | \f | |
3707 | /*********************************************************************** | |
3708 | Saving and restoring state | |
3709 | ***********************************************************************/ | |
3710 | ||
3711 | /* Save current settings of IT on IT->stack. Called, for example, | |
3712 | before setting up IT for an overlay string, to be able to restore | |
3713 | IT's settings to what they were after the overlay string has been | |
3714 | processed. */ | |
3715 | ||
3716 | static void | |
3717 | push_it (it) | |
3718 | struct it *it; | |
3719 | { | |
3720 | struct iterator_stack_entry *p; | |
3721 | ||
3722 | xassert (it->sp < 2); | |
3723 | p = it->stack + it->sp; | |
3724 | ||
3725 | p->stop_charpos = it->stop_charpos; | |
3726 | xassert (it->face_id >= 0); | |
3727 | p->face_id = it->face_id; | |
3728 | p->string = it->string; | |
3729 | p->pos = it->current; | |
3730 | p->end_charpos = it->end_charpos; | |
3731 | p->string_nchars = it->string_nchars; | |
3732 | p->area = it->area; | |
3733 | p->multibyte_p = it->multibyte_p; | |
3734 | p->space_width = it->space_width; | |
3735 | p->font_height = it->font_height; | |
3736 | p->voffset = it->voffset; | |
3737 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 3738 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
3739 | ++it->sp; |
3740 | } | |
3741 | ||
3742 | ||
3743 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
3744 | more overlay strings must be processed, and we return to delivering | |
3745 | display elements from a buffer, or when the end of a string from a | |
3746 | `display' property is reached and we return to delivering display | |
3747 | elements from an overlay string, or from a buffer. */ | |
3748 | ||
3749 | static void | |
3750 | pop_it (it) | |
3751 | struct it *it; | |
3752 | { | |
3753 | struct iterator_stack_entry *p; | |
3754 | ||
3755 | xassert (it->sp > 0); | |
3756 | --it->sp; | |
3757 | p = it->stack + it->sp; | |
3758 | it->stop_charpos = p->stop_charpos; | |
3759 | it->face_id = p->face_id; | |
3760 | it->string = p->string; | |
3761 | it->current = p->pos; | |
3762 | it->end_charpos = p->end_charpos; | |
3763 | it->string_nchars = p->string_nchars; | |
3764 | it->area = p->area; | |
3765 | it->multibyte_p = p->multibyte_p; | |
3766 | it->space_width = p->space_width; | |
3767 | it->font_height = p->font_height; | |
3768 | it->voffset = p->voffset; | |
3769 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3770 | } | |
3771 | ||
3772 | ||
3773 | \f | |
3774 | /*********************************************************************** | |
3775 | Moving over lines | |
3776 | ***********************************************************************/ | |
3777 | ||
3778 | /* Set IT's current position to the previous line start. */ | |
3779 | ||
3780 | static void | |
3781 | back_to_previous_line_start (it) | |
3782 | struct it *it; | |
3783 | { | |
3784 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3785 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3786 | } | |
3787 | ||
3788 | ||
cafafe0b GM |
3789 | /* Move IT to the next line start. |
3790 | ||
3791 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if | |
3792 | we skipped over part of the text (as opposed to moving the iterator | |
3793 | continuously over the text). Otherwise, don't change the value | |
3794 | of *SKIPPED_P. | |
3795 | ||
3796 | Newlines may come from buffer text, overlay strings, or strings | |
3797 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
3798 | simply use find_next_newline_no_quit. |
3799 | ||
3800 | Note that this function may not skip over invisible text that is so | |
3801 | because of text properties and immediately follows a newline. If | |
3802 | it would, function reseat_at_next_visible_line_start, when called | |
3803 | from set_iterator_to_next, would effectively make invisible | |
3804 | characters following a newline part of the wrong glyph row, which | |
3805 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 3806 | |
cafafe0b GM |
3807 | static int |
3808 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 3809 | struct it *it; |
cafafe0b | 3810 | int *skipped_p; |
5f5c8ee5 | 3811 | { |
54918e2b | 3812 | int old_selective, newline_found_p, n; |
cafafe0b GM |
3813 | const int MAX_NEWLINE_DISTANCE = 500; |
3814 | ||
0fd37545 GM |
3815 | /* If already on a newline, just consume it to avoid unintended |
3816 | skipping over invisible text below. */ | |
51695746 GM |
3817 | if (it->what == IT_CHARACTER |
3818 | && it->c == '\n' | |
3819 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
3820 | { |
3821 | set_iterator_to_next (it, 0); | |
a77dc1ec | 3822 | it->c = 0; |
0fd37545 GM |
3823 | return 1; |
3824 | } | |
3825 | ||
54918e2b | 3826 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
3827 | unnecessary because it's done by the caller, and (b) leads to an |
3828 | infinite recursion because next_element_from_ellipsis indirectly | |
3829 | calls this function. */ | |
54918e2b GM |
3830 | old_selective = it->selective; |
3831 | it->selective = 0; | |
3832 | ||
cafafe0b GM |
3833 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
3834 | from buffer text. */ | |
3aec8722 GM |
3835 | for (n = newline_found_p = 0; |
3836 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
3837 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 3838 | { |
8692ca92 GM |
3839 | if (!get_next_display_element (it)) |
3840 | break; | |
d02f1cb8 | 3841 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 3842 | set_iterator_to_next (it, 0); |
cafafe0b GM |
3843 | } |
3844 | ||
3845 | /* If we didn't find a newline near enough, see if we can use a | |
3846 | short-cut. */ | |
3aec8722 | 3847 | if (n == MAX_NEWLINE_DISTANCE) |
cafafe0b GM |
3848 | { |
3849 | int start = IT_CHARPOS (*it); | |
3850 | int limit = find_next_newline_no_quit (start, 1); | |
3851 | Lisp_Object pos; | |
3852 | ||
3853 | xassert (!STRINGP (it->string)); | |
3854 | ||
3855 | /* If there isn't any `display' property in sight, and no | |
3856 | overlays, we can just use the position of the newline in | |
3857 | buffer text. */ | |
3858 | if (it->stop_charpos >= limit | |
3859 | || ((pos = Fnext_single_property_change (make_number (start), | |
3860 | Qdisplay, | |
3861 | Qnil, make_number (limit)), | |
3862 | NILP (pos)) | |
3863 | && next_overlay_change (start) == ZV)) | |
3864 | { | |
3865 | IT_CHARPOS (*it) = limit; | |
3866 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
3867 | *skipped_p = newline_found_p = 1; | |
3868 | } | |
3869 | else | |
3870 | { | |
3871 | while (get_next_display_element (it) | |
3872 | && !newline_found_p) | |
3873 | { | |
3874 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
3875 | set_iterator_to_next (it, 0); | |
3876 | } | |
3877 | } | |
3878 | } | |
3879 | ||
54918e2b | 3880 | it->selective = old_selective; |
cafafe0b | 3881 | return newline_found_p; |
5f5c8ee5 GM |
3882 | } |
3883 | ||
3884 | ||
3885 | /* Set IT's current position to the previous visible line start. Skip | |
3886 | invisible text that is so either due to text properties or due to | |
3887 | selective display. Caution: this does not change IT->current_x and | |
3888 | IT->hpos. */ | |
3889 | ||
3890 | static void | |
3891 | back_to_previous_visible_line_start (it) | |
3892 | struct it *it; | |
3893 | { | |
3894 | int visible_p = 0; | |
3895 | ||
3896 | /* Go back one newline if not on BEGV already. */ | |
3897 | if (IT_CHARPOS (*it) > BEGV) | |
3898 | back_to_previous_line_start (it); | |
3899 | ||
3900 | /* Move over lines that are invisible because of selective display | |
3901 | or text properties. */ | |
3902 | while (IT_CHARPOS (*it) > BEGV | |
3903 | && !visible_p) | |
3904 | { | |
3905 | visible_p = 1; | |
3906 | ||
3907 | /* If selective > 0, then lines indented more than that values | |
3908 | are invisible. */ | |
3909 | if (it->selective > 0 | |
3910 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3911 | it->selective)) | |
3912 | visible_p = 0; | |
5f5c8ee5 GM |
3913 | else |
3914 | { | |
3915 | Lisp_Object prop; | |
3916 | ||
6fc556fd KR |
3917 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
3918 | Qinvisible, it->window); | |
5f5c8ee5 GM |
3919 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
3920 | visible_p = 0; | |
3921 | } | |
5f5c8ee5 GM |
3922 | |
3923 | /* Back one more newline if the current one is invisible. */ | |
3924 | if (!visible_p) | |
3925 | back_to_previous_line_start (it); | |
3926 | } | |
3927 | ||
3928 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3929 | xassert (IT_CHARPOS (*it) == BEGV | |
3930 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3931 | CHECK_IT (it); | |
3932 | } | |
3933 | ||
3934 | ||
3935 | /* Reseat iterator IT at the previous visible line start. Skip | |
3936 | invisible text that is so either due to text properties or due to | |
3937 | selective display. At the end, update IT's overlay information, | |
3938 | face information etc. */ | |
3939 | ||
3940 | static void | |
3941 | reseat_at_previous_visible_line_start (it) | |
3942 | struct it *it; | |
3943 | { | |
3944 | back_to_previous_visible_line_start (it); | |
3945 | reseat (it, it->current.pos, 1); | |
3946 | CHECK_IT (it); | |
3947 | } | |
3948 | ||
3949 | ||
3950 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3951 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3952 | preceding the line start. Skip over invisible text that is so | |
3953 | because of selective display. Compute faces, overlays etc at the | |
3954 | new position. Note that this function does not skip over text that | |
3955 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3956 | |
3957 | static void | |
312246d1 | 3958 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3959 | struct it *it; |
312246d1 | 3960 | int on_newline_p; |
5f5c8ee5 | 3961 | { |
cafafe0b GM |
3962 | int newline_found_p, skipped_p = 0; |
3963 | ||
3964 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
3965 | ||
3966 | /* Skip over lines that are invisible because they are indented | |
3967 | more than the value of IT->selective. */ | |
3968 | if (it->selective > 0) | |
3969 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 3970 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
cafafe0b | 3971 | it->selective)) |
a77dc1ec GM |
3972 | { |
3973 | xassert (FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3974 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
3975 | } | |
cafafe0b GM |
3976 | |
3977 | /* Position on the newline if that's what's requested. */ | |
3978 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 3979 | { |
cafafe0b | 3980 | if (STRINGP (it->string)) |
5f5c8ee5 | 3981 | { |
cafafe0b GM |
3982 | if (IT_STRING_CHARPOS (*it) > 0) |
3983 | { | |
3984 | --IT_STRING_CHARPOS (*it); | |
3985 | --IT_STRING_BYTEPOS (*it); | |
3986 | } | |
5f5c8ee5 | 3987 | } |
cafafe0b | 3988 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
3989 | { |
3990 | --IT_CHARPOS (*it); | |
cafafe0b GM |
3991 | --IT_BYTEPOS (*it); |
3992 | reseat (it, it->current.pos, 0); | |
312246d1 | 3993 | } |
5f5c8ee5 | 3994 | } |
cafafe0b GM |
3995 | else if (skipped_p) |
3996 | reseat (it, it->current.pos, 0); | |
5f5c8ee5 GM |
3997 | |
3998 | CHECK_IT (it); | |
3999 | } | |
4000 | ||
4001 | ||
4002 | \f | |
4003 | /*********************************************************************** | |
4004 | Changing an iterator's position | |
4005 | ***********************************************************************/ | |
4006 | ||
4007 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
4008 | is non-zero, always check for text properties at the new position. | |
4009 | Otherwise, text properties are only looked up if POS >= | |
4010 | IT->check_charpos of a property. */ | |
4011 | ||
4012 | static void | |
4013 | reseat (it, pos, force_p) | |
4014 | struct it *it; | |
4015 | struct text_pos pos; | |
4016 | int force_p; | |
4017 | { | |
4018 | int original_pos = IT_CHARPOS (*it); | |
4019 | ||
4020 | reseat_1 (it, pos, 0); | |
4021 | ||
4022 | /* Determine where to check text properties. Avoid doing it | |
4023 | where possible because text property lookup is very expensive. */ | |
4024 | if (force_p | |
4025 | || CHARPOS (pos) > it->stop_charpos | |
4026 | || CHARPOS (pos) < original_pos) | |
4027 | handle_stop (it); | |
4028 | ||
4029 | CHECK_IT (it); | |
4030 | } | |
4031 | ||
4032 | ||
4033 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
4034 | IT->stop_pos to POS, also. */ | |
4035 | ||
4036 | static void | |
4037 | reseat_1 (it, pos, set_stop_p) | |
4038 | struct it *it; | |
4039 | struct text_pos pos; | |
4040 | int set_stop_p; | |
4041 | { | |
4042 | /* Don't call this function when scanning a C string. */ | |
4043 | xassert (it->s == NULL); | |
4044 | ||
4045 | /* POS must be a reasonable value. */ | |
4046 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
4047 | ||
4048 | it->current.pos = it->position = pos; | |
4049 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 4050 | it->end_charpos = ZV; |
5f5c8ee5 GM |
4051 | it->dpvec = NULL; |
4052 | it->current.dpvec_index = -1; | |
4053 | it->current.overlay_string_index = -1; | |
4054 | IT_STRING_CHARPOS (*it) = -1; | |
4055 | IT_STRING_BYTEPOS (*it) = -1; | |
4056 | it->string = Qnil; | |
4057 | it->method = next_element_from_buffer; | |
06fd3792 | 4058 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 4059 | it->sp = 0; |
4aad61f8 | 4060 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
4061 | |
4062 | if (set_stop_p) | |
4063 | it->stop_charpos = CHARPOS (pos); | |
4064 | } | |
4065 | ||
4066 | ||
4067 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
4068 | If S is non-null, it is a C string to iterate over. Otherwise, | |
4069 | STRING gives a Lisp string to iterate over. | |
4070 | ||
4071 | If PRECISION > 0, don't return more then PRECISION number of | |
4072 | characters from the string. | |
4073 | ||
4074 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
4075 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
4076 | field width. | |
4077 | ||
4078 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
4079 | MULTIBYTE > 0 means enable it, | |
4080 | MULTIBYTE < 0 means use IT->multibyte_p. | |
4081 | ||
4082 | IT must be initialized via a prior call to init_iterator before | |
4083 | calling this function. */ | |
4084 | ||
4085 | static void | |
4086 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
4087 | struct it *it; | |
4088 | unsigned char *s; | |
4089 | Lisp_Object string; | |
4090 | int charpos; | |
4091 | int precision, field_width, multibyte; | |
4092 | { | |
4093 | /* No region in strings. */ | |
4094 | it->region_beg_charpos = it->region_end_charpos = -1; | |
4095 | ||
4096 | /* No text property checks performed by default, but see below. */ | |
4097 | it->stop_charpos = -1; | |
4098 | ||
4099 | /* Set iterator position and end position. */ | |
4100 | bzero (&it->current, sizeof it->current); | |
4101 | it->current.overlay_string_index = -1; | |
4102 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
4103 | xassert (charpos >= 0); |
4104 | ||
e719f5ae GM |
4105 | /* If STRING is specified, use its multibyteness, otherwise use the |
4106 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 4107 | if (multibyte >= 0) |
5f5c8ee5 GM |
4108 | it->multibyte_p = multibyte > 0; |
4109 | ||
4110 | if (s == NULL) | |
4111 | { | |
4112 | xassert (STRINGP (string)); | |
4113 | it->string = string; | |
4114 | it->s = NULL; | |
4115 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
4116 | it->method = next_element_from_string; | |
4117 | it->current.string_pos = string_pos (charpos, string); | |
4118 | } | |
4119 | else | |
4120 | { | |
4121 | it->s = s; | |
4122 | it->string = Qnil; | |
4123 | ||
4124 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
4125 | for displaying C strings. */ | |
4126 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
4127 | if (it->multibyte_p) | |
4128 | { | |
4129 | it->current.pos = c_string_pos (charpos, s, 1); | |
4130 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
4131 | } | |
4132 | else | |
4133 | { | |
4134 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
4135 | it->end_charpos = it->string_nchars = strlen (s); | |
4136 | } | |
4137 | ||
4138 | it->method = next_element_from_c_string; | |
4139 | } | |
4140 | ||
4141 | /* PRECISION > 0 means don't return more than PRECISION characters | |
4142 | from the string. */ | |
4143 | if (precision > 0 && it->end_charpos - charpos > precision) | |
4144 | it->end_charpos = it->string_nchars = charpos + precision; | |
4145 | ||
4146 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
4147 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
4148 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
4149 | padding with `-' at the end of a mode line. */ | |
4150 | if (field_width < 0) | |
4151 | field_width = INFINITY; | |
4152 | if (field_width > it->end_charpos - charpos) | |
4153 | it->end_charpos = charpos + field_width; | |
4154 | ||
4155 | /* Use the standard display table for displaying strings. */ | |
4156 | if (DISP_TABLE_P (Vstandard_display_table)) | |
4157 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
4158 | ||
4159 | it->stop_charpos = charpos; | |
4160 | CHECK_IT (it); | |
4161 | } | |
4162 | ||
4163 | ||
4164 | \f | |
4165 | /*********************************************************************** | |
4166 | Iteration | |
4167 | ***********************************************************************/ | |
4168 | ||
4169 | /* Load IT's display element fields with information about the next | |
4170 | display element from the current position of IT. Value is zero if | |
4171 | end of buffer (or C string) is reached. */ | |
4172 | ||
4173 | int | |
4174 | get_next_display_element (it) | |
4175 | struct it *it; | |
4176 | { | |
4177 | /* Non-zero means that we found an display element. Zero means that | |
4178 | we hit the end of what we iterate over. Performance note: the | |
4179 | function pointer `method' used here turns out to be faster than | |
4180 | using a sequence of if-statements. */ | |
4181 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
4182 | |
4183 | if (it->what == IT_CHARACTER) | |
4184 | { | |
4185 | /* Map via display table or translate control characters. | |
4186 | IT->c, IT->len etc. have been set to the next character by | |
4187 | the function call above. If we have a display table, and it | |
4188 | contains an entry for IT->c, translate it. Don't do this if | |
4189 | IT->c itself comes from a display table, otherwise we could | |
4190 | end up in an infinite recursion. (An alternative could be to | |
4191 | count the recursion depth of this function and signal an | |
4192 | error when a certain maximum depth is reached.) Is it worth | |
4193 | it? */ | |
4194 | if (success_p && it->dpvec == NULL) | |
4195 | { | |
4196 | Lisp_Object dv; | |
4197 | ||
4198 | if (it->dp | |
4199 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
4200 | VECTORP (dv))) | |
4201 | { | |
4202 | struct Lisp_Vector *v = XVECTOR (dv); | |
4203 | ||
4204 | /* Return the first character from the display table | |
4205 | entry, if not empty. If empty, don't display the | |
4206 | current character. */ | |
4207 | if (v->size) | |
4208 | { | |
4209 | it->dpvec_char_len = it->len; | |
4210 | it->dpvec = v->contents; | |
4211 | it->dpend = v->contents + v->size; | |
4212 | it->current.dpvec_index = 0; | |
4213 | it->method = next_element_from_display_vector; | |
7eee47cc GM |
4214 | success_p = get_next_display_element (it); |
4215 | } | |
4216 | else | |
4217 | { | |
4218 | set_iterator_to_next (it, 0); | |
4219 | success_p = get_next_display_element (it); | |
5f5c8ee5 | 4220 | } |
5f5c8ee5 GM |
4221 | } |
4222 | ||
4223 | /* Translate control characters into `\003' or `^C' form. | |
4224 | Control characters coming from a display table entry are | |
4225 | currently not translated because we use IT->dpvec to hold | |
4226 | the translation. This could easily be changed but I | |
197516c2 KH |
4227 | don't believe that it is worth doing. |
4228 | ||
4229 | Non-printable multibyte characters are also translated | |
4230 | octal form. */ | |
5f5c8ee5 GM |
4231 | else if ((it->c < ' ' |
4232 | && (it->area != TEXT_AREA | |
c6e89d6c | 4233 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 4234 | || (it->c >= 127 |
197516c2 KH |
4235 | && it->len == 1) |
4236 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
4237 | { |
4238 | /* IT->c is a control character which must be displayed | |
4239 | either as '\003' or as `^C' where the '\\' and '^' | |
4240 | can be defined in the display table. Fill | |
4241 | IT->ctl_chars with glyphs for what we have to | |
4242 | display. Then, set IT->dpvec to these glyphs. */ | |
4243 | GLYPH g; | |
4244 | ||
54c85a23 | 4245 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
4246 | { |
4247 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
4248 | if (it->dp | |
4249 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
4250 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
4251 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
4252 | else | |
4253 | g = FAST_MAKE_GLYPH ('^', 0); | |
4254 | XSETINT (it->ctl_chars[0], g); | |
4255 | ||
4256 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
4257 | XSETINT (it->ctl_chars[1], g); | |
4258 | ||
4259 | /* Set up IT->dpvec and return first character from it. */ | |
4260 | it->dpvec_char_len = it->len; | |
4261 | it->dpvec = it->ctl_chars; | |
4262 | it->dpend = it->dpvec + 2; | |
4263 | it->current.dpvec_index = 0; | |
4264 | it->method = next_element_from_display_vector; | |
4265 | get_next_display_element (it); | |
4266 | } | |
4267 | else | |
4268 | { | |
260a86a0 | 4269 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 4270 | int len; |
197516c2 KH |
4271 | int i; |
4272 | GLYPH escape_glyph; | |
4273 | ||
5f5c8ee5 GM |
4274 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
4275 | if (it->dp | |
4276 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
4277 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 4278 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 4279 | else |
197516c2 KH |
4280 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
4281 | ||
c5924f47 KH |
4282 | if (SINGLE_BYTE_CHAR_P (it->c)) |
4283 | str[0] = it->c, len = 1; | |
4284 | else | |
ea9dd091 GM |
4285 | { |
4286 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
4287 | if (len < 0) | |
4288 | { | |
4289 | /* It's an invalid character, which | |
4290 | shouldn't happen actually, but due to | |
4291 | bugs it may happen. Let's print the char | |
4292 | as is, there's not much meaningful we can | |
4293 | do with it. */ | |
4294 | str[0] = it->c; | |
4295 | str[1] = it->c >> 8; | |
4296 | str[2] = it->c >> 16; | |
4297 | str[3] = it->c >> 24; | |
4298 | len = 4; | |
4299 | } | |
4300 | } | |
c5924f47 | 4301 | |
197516c2 KH |
4302 | for (i = 0; i < len; i++) |
4303 | { | |
4304 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
4305 | /* Insert three more glyphs into IT->ctl_chars for | |
4306 | the octal display of the character. */ | |
4307 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
4308 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
4309 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
4310 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
4311 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
4312 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
4313 | } | |
5f5c8ee5 GM |
4314 | |
4315 | /* Set up IT->dpvec and return the first character | |
4316 | from it. */ | |
4317 | it->dpvec_char_len = it->len; | |
4318 | it->dpvec = it->ctl_chars; | |
197516c2 | 4319 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
4320 | it->current.dpvec_index = 0; |
4321 | it->method = next_element_from_display_vector; | |
4322 | get_next_display_element (it); | |
4323 | } | |
4324 | } | |
4325 | } | |
4326 | ||
980806b6 KH |
4327 | /* Adjust face id for a multibyte character. There are no |
4328 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
4329 | if (it->multibyte_p |
4330 | && success_p | |
980806b6 | 4331 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 4332 | { |
980806b6 KH |
4333 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
4334 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
4335 | } |
4336 | } | |
4337 | ||
4338 | /* Is this character the last one of a run of characters with | |
4339 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
4340 | if (it->face_box_p | |
4341 | && it->s == NULL) | |
4342 | { | |
4343 | int face_id; | |
4344 | struct face *face; | |
4345 | ||
4346 | it->end_of_box_run_p | |
4347 | = ((face_id = face_after_it_pos (it), | |
4348 | face_id != it->face_id) | |
4349 | && (face = FACE_FROM_ID (it->f, face_id), | |
4350 | face->box == FACE_NO_BOX)); | |
4351 | } | |
4352 | ||
4353 | /* Value is 0 if end of buffer or string reached. */ | |
4354 | return success_p; | |
4355 | } | |
4356 | ||
4357 | ||
4358 | /* Move IT to the next display element. | |
4359 | ||
cafafe0b GM |
4360 | RESEAT_P non-zero means if called on a newline in buffer text, |
4361 | skip to the next visible line start. | |
4362 | ||
5f5c8ee5 GM |
4363 | Functions get_next_display_element and set_iterator_to_next are |
4364 | separate because I find this arrangement easier to handle than a | |
4365 | get_next_display_element function that also increments IT's | |
4366 | position. The way it is we can first look at an iterator's current | |
4367 | display element, decide whether it fits on a line, and if it does, | |
4368 | increment the iterator position. The other way around we probably | |
4369 | would either need a flag indicating whether the iterator has to be | |
4370 | incremented the next time, or we would have to implement a | |
4371 | decrement position function which would not be easy to write. */ | |
4372 | ||
4373 | void | |
cafafe0b | 4374 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 4375 | struct it *it; |
cafafe0b | 4376 | int reseat_p; |
5f5c8ee5 | 4377 | { |
483de32b GM |
4378 | /* Reset flags indicating start and end of a sequence of characters |
4379 | with box. Reset them at the start of this function because | |
4380 | moving the iterator to a new position might set them. */ | |
4381 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
4382 | ||
5f5c8ee5 GM |
4383 | if (it->method == next_element_from_buffer) |
4384 | { | |
4385 | /* The current display element of IT is a character from | |
4386 | current_buffer. Advance in the buffer, and maybe skip over | |
4387 | invisible lines that are so because of selective display. */ | |
cafafe0b | 4388 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 4389 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4390 | else |
4391 | { | |
4392 | xassert (it->len != 0); | |
4393 | IT_BYTEPOS (*it) += it->len; | |
4394 | IT_CHARPOS (*it) += 1; | |
4395 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
4396 | } | |
4397 | } | |
260a86a0 KH |
4398 | else if (it->method == next_element_from_composition) |
4399 | { | |
4400 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
4401 | if (STRINGP (it->string)) | |
4402 | { | |
4403 | IT_STRING_BYTEPOS (*it) += it->len; | |
4404 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
4405 | it->method = next_element_from_string; | |
4406 | goto consider_string_end; | |
4407 | } | |
4408 | else | |
4409 | { | |
4410 | IT_BYTEPOS (*it) += it->len; | |
4411 | IT_CHARPOS (*it) += it->cmp_len; | |
4412 | it->method = next_element_from_buffer; | |
4413 | } | |
4414 | } | |
5f5c8ee5 GM |
4415 | else if (it->method == next_element_from_c_string) |
4416 | { | |
4417 | /* Current display element of IT is from a C string. */ | |
4418 | IT_BYTEPOS (*it) += it->len; | |
4419 | IT_CHARPOS (*it) += 1; | |
4420 | } | |
4421 | else if (it->method == next_element_from_display_vector) | |
4422 | { | |
4423 | /* Current display element of IT is from a display table entry. | |
4424 | Advance in the display table definition. Reset it to null if | |
4425 | end reached, and continue with characters from buffers/ | |
4426 | strings. */ | |
4427 | ++it->current.dpvec_index; | |
286bcbc9 | 4428 | |
980806b6 KH |
4429 | /* Restore face of the iterator to what they were before the |
4430 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 4431 | it->face_id = it->saved_face_id; |
286bcbc9 | 4432 | |
5f5c8ee5 GM |
4433 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
4434 | { | |
4435 | if (it->s) | |
4436 | it->method = next_element_from_c_string; | |
4437 | else if (STRINGP (it->string)) | |
4438 | it->method = next_element_from_string; | |
4439 | else | |
4440 | it->method = next_element_from_buffer; | |
4441 | ||
4442 | it->dpvec = NULL; | |
4443 | it->current.dpvec_index = -1; | |
4444 | ||
312246d1 GM |
4445 | /* Skip over characters which were displayed via IT->dpvec. */ |
4446 | if (it->dpvec_char_len < 0) | |
4447 | reseat_at_next_visible_line_start (it, 1); | |
4448 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
4449 | { |
4450 | it->len = it->dpvec_char_len; | |
cafafe0b | 4451 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 GM |
4452 | } |
4453 | } | |
4454 | } | |
4455 | else if (it->method == next_element_from_string) | |
4456 | { | |
4457 | /* Current display element is a character from a Lisp string. */ | |
4458 | xassert (it->s == NULL && STRINGP (it->string)); | |
4459 | IT_STRING_BYTEPOS (*it) += it->len; | |
4460 | IT_STRING_CHARPOS (*it) += 1; | |
4461 | ||
4462 | consider_string_end: | |
4463 | ||
4464 | if (it->current.overlay_string_index >= 0) | |
4465 | { | |
4466 | /* IT->string is an overlay string. Advance to the | |
4467 | next, if there is one. */ | |
4468 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
4469 | next_overlay_string (it); | |
4470 | } | |
4471 | else | |
4472 | { | |
4473 | /* IT->string is not an overlay string. If we reached | |
4474 | its end, and there is something on IT->stack, proceed | |
4475 | with what is on the stack. This can be either another | |
4476 | string, this time an overlay string, or a buffer. */ | |
4477 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
4478 | && it->sp > 0) | |
4479 | { | |
4480 | pop_it (it); | |
4481 | if (!STRINGP (it->string)) | |
4482 | it->method = next_element_from_buffer; | |
b2046df8 GM |
4483 | else |
4484 | goto consider_string_end; | |
5f5c8ee5 GM |
4485 | } |
4486 | } | |
4487 | } | |
4488 | else if (it->method == next_element_from_image | |
4489 | || it->method == next_element_from_stretch) | |
4490 | { | |
4491 | /* The position etc with which we have to proceed are on | |
4492 | the stack. The position may be at the end of a string, | |
4493 | if the `display' property takes up the whole string. */ | |
4494 | pop_it (it); | |
4495 | it->image_id = 0; | |
4496 | if (STRINGP (it->string)) | |
4497 | { | |
4498 | it->method = next_element_from_string; | |
4499 | goto consider_string_end; | |
4500 | } | |
4501 | else | |
4502 | it->method = next_element_from_buffer; | |
4503 | } | |
4504 | else | |
4505 | /* There are no other methods defined, so this should be a bug. */ | |
4506 | abort (); | |
4507 | ||
5f5c8ee5 GM |
4508 | xassert (it->method != next_element_from_string |
4509 | || (STRINGP (it->string) | |
4510 | && IT_STRING_CHARPOS (*it) >= 0)); | |
4511 | } | |
4512 | ||
4513 | ||
4514 | /* Load IT's display element fields with information about the next | |
4515 | display element which comes from a display table entry or from the | |
4516 | result of translating a control character to one of the forms `^C' | |
4517 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
4518 | ||
4519 | static int | |
4520 | next_element_from_display_vector (it) | |
4521 | struct it *it; | |
4522 | { | |
4523 | /* Precondition. */ | |
4524 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
4525 | ||
4526 | /* Remember the current face id in case glyphs specify faces. | |
4527 | IT's face is restored in set_iterator_to_next. */ | |
4528 | it->saved_face_id = it->face_id; | |
4529 | ||
4530 | if (INTEGERP (*it->dpvec) | |
4531 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
4532 | { | |
4533 | int lface_id; | |
4534 | GLYPH g; | |
4535 | ||
4536 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
4537 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 4538 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
4539 | |
4540 | /* The entry may contain a face id to use. Such a face id is | |
4541 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 4542 | zero means no face is specified. */ |
5f5c8ee5 GM |
4543 | lface_id = FAST_GLYPH_FACE (g); |
4544 | if (lface_id) | |
4545 | { | |
969065c3 | 4546 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
4547 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
4548 | if (face_id >= 0) | |
969065c3 | 4549 | it->face_id = face_id; |
5f5c8ee5 GM |
4550 | } |
4551 | } | |
4552 | else | |
4553 | /* Display table entry is invalid. Return a space. */ | |
4554 | it->c = ' ', it->len = 1; | |
4555 | ||
4556 | /* Don't change position and object of the iterator here. They are | |
4557 | still the values of the character that had this display table | |
4558 | entry or was translated, and that's what we want. */ | |
4559 | it->what = IT_CHARACTER; | |
4560 | return 1; | |
4561 | } | |
4562 | ||
4563 | ||
4564 | /* Load IT with the next display element from Lisp string IT->string. | |
4565 | IT->current.string_pos is the current position within the string. | |
4566 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
4567 | overlay string. */ | |
4568 | ||
4569 | static int | |
4570 | next_element_from_string (it) | |
4571 | struct it *it; | |
4572 | { | |
4573 | struct text_pos position; | |
4574 | ||
4575 | xassert (STRINGP (it->string)); | |
4576 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
4577 | position = it->current.string_pos; | |
4578 | ||
4579 | /* Time to check for invisible text? */ | |
4580 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
4581 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
4582 | { | |
4583 | handle_stop (it); | |
4584 | ||
4585 | /* Since a handler may have changed IT->method, we must | |
4586 | recurse here. */ | |
4587 | return get_next_display_element (it); | |
4588 | } | |
4589 | ||
4590 | if (it->current.overlay_string_index >= 0) | |
4591 | { | |
4592 | /* Get the next character from an overlay string. In overlay | |
4593 | strings, There is no field width or padding with spaces to | |
4594 | do. */ | |
4595 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
4596 | { | |
4597 | it->what = IT_EOB; | |
4598 | return 0; | |
4599 | } | |
4600 | else if (STRING_MULTIBYTE (it->string)) | |
4601 | { | |
4602 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
4603 | - IT_STRING_BYTEPOS (*it)); | |
4604 | unsigned char *s = (XSTRING (it->string)->data | |
4605 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4606 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
4607 | } |
4608 | else | |
4609 | { | |
4610 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
4611 | it->len = 1; | |
4612 | } | |
4613 | } | |
4614 | else | |
4615 | { | |
4616 | /* Get the next character from a Lisp string that is not an | |
4617 | overlay string. Such strings come from the mode line, for | |
4618 | example. We may have to pad with spaces, or truncate the | |
4619 | string. See also next_element_from_c_string. */ | |
4620 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
4621 | { | |
4622 | it->what = IT_EOB; | |
4623 | return 0; | |
4624 | } | |
4625 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
4626 | { | |
4627 | /* Pad with spaces. */ | |
4628 | it->c = ' ', it->len = 1; | |
4629 | CHARPOS (position) = BYTEPOS (position) = -1; | |
4630 | } | |
4631 | else if (STRING_MULTIBYTE (it->string)) | |
4632 | { | |
4633 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
4634 | - IT_STRING_BYTEPOS (*it)); | |
4635 | unsigned char *s = (XSTRING (it->string)->data | |
4636 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4637 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
4638 | } |
4639 | else | |
4640 | { | |
4641 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
4642 | it->len = 1; | |
4643 | } | |
4644 | } | |
4645 | ||
4646 | /* Record what we have and where it came from. Note that we store a | |
4647 | buffer position in IT->position although it could arguably be a | |
4648 | string position. */ | |
4649 | it->what = IT_CHARACTER; | |
4650 | it->object = it->string; | |
4651 | it->position = position; | |
4652 | return 1; | |
4653 | } | |
4654 | ||
4655 | ||
4656 | /* Load IT with next display element from C string IT->s. | |
4657 | IT->string_nchars is the maximum number of characters to return | |
4658 | from the string. IT->end_charpos may be greater than | |
4659 | IT->string_nchars when this function is called, in which case we | |
4660 | may have to return padding spaces. Value is zero if end of string | |
4661 | reached, including padding spaces. */ | |
4662 | ||
4663 | static int | |
4664 | next_element_from_c_string (it) | |
4665 | struct it *it; | |
4666 | { | |
4667 | int success_p = 1; | |
4668 | ||
4669 | xassert (it->s); | |
4670 | it->what = IT_CHARACTER; | |
4671 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
4672 | it->object = Qnil; | |
4673 | ||
4674 | /* IT's position can be greater IT->string_nchars in case a field | |
4675 | width or precision has been specified when the iterator was | |
4676 | initialized. */ | |
4677 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4678 | { | |
4679 | /* End of the game. */ | |
4680 | it->what = IT_EOB; | |
4681 | success_p = 0; | |
4682 | } | |
4683 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
4684 | { | |
4685 | /* Pad with spaces. */ | |
4686 | it->c = ' ', it->len = 1; | |
4687 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
4688 | } | |
4689 | else if (it->multibyte_p) | |
4690 | { | |
4691 | /* Implementation note: The calls to strlen apparently aren't a | |
4692 | performance problem because there is no noticeable performance | |
4693 | difference between Emacs running in unibyte or multibyte mode. */ | |
4694 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
4695 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
4696 | maxlen, &it->len); | |
5f5c8ee5 GM |
4697 | } |
4698 | else | |
4699 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
4700 | ||
4701 | return success_p; | |
4702 | } | |
4703 | ||
4704 | ||
4705 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
4706 | The definition of the ellipsis glyphs may come from a display table | |
4707 | entry. This function Fills IT with the first glyph from the | |
4708 | ellipsis if an ellipsis is to be displayed. */ | |
4709 | ||
13f19968 | 4710 | static int |
5f5c8ee5 GM |
4711 | next_element_from_ellipsis (it) |
4712 | struct it *it; | |
4713 | { | |
13f19968 | 4714 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 4715 | { |
13f19968 GM |
4716 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
4717 | { | |
4718 | /* Use the display table definition for `...'. Invalid glyphs | |
4719 | will be handled by the method returning elements from dpvec. */ | |
4720 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
4721 | it->dpvec_char_len = it->len; | |
4722 | it->dpvec = v->contents; | |
4723 | it->dpend = v->contents + v->size; | |
4724 | it->current.dpvec_index = 0; | |
4725 | it->method = next_element_from_display_vector; | |
4726 | } | |
4727 | else | |
4728 | { | |
4729 | /* Use default `...' which is stored in default_invis_vector. */ | |
4730 | it->dpvec_char_len = it->len; | |
4731 | it->dpvec = default_invis_vector; | |
4732 | it->dpend = default_invis_vector + 3; | |
4733 | it->current.dpvec_index = 0; | |
4734 | it->method = next_element_from_display_vector; | |
4735 | } | |
5f5c8ee5 | 4736 | } |
13f19968 | 4737 | else |
54918e2b | 4738 | { |
4aad61f8 GM |
4739 | /* The face at the current position may be different from the |
4740 | face we find after the invisible text. Remember what it | |
4741 | was in IT->saved_face_id, and signal that it's there by | |
4742 | setting face_before_selective_p. */ | |
4743 | it->saved_face_id = it->face_id; | |
54918e2b GM |
4744 | it->method = next_element_from_buffer; |
4745 | reseat_at_next_visible_line_start (it, 1); | |
4aad61f8 | 4746 | it->face_before_selective_p = 1; |
54918e2b | 4747 | } |
13f19968 GM |
4748 | |
4749 | return get_next_display_element (it); | |
5f5c8ee5 GM |
4750 | } |
4751 | ||
4752 | ||
4753 | /* Deliver an image display element. The iterator IT is already | |
4754 | filled with image information (done in handle_display_prop). Value | |
4755 | is always 1. */ | |
4756 | ||
4757 | ||
4758 | static int | |
4759 | next_element_from_image (it) | |
4760 | struct it *it; | |
4761 | { | |
4762 | it->what = IT_IMAGE; | |
4763 | return 1; | |
4764 | } | |
4765 | ||
4766 | ||
4767 | /* Fill iterator IT with next display element from a stretch glyph | |
4768 | property. IT->object is the value of the text property. Value is | |
4769 | always 1. */ | |
4770 | ||
4771 | static int | |
4772 | next_element_from_stretch (it) | |
4773 | struct it *it; | |
4774 | { | |
4775 | it->what = IT_STRETCH; | |
4776 | return 1; | |
4777 | } | |
4778 | ||
4779 | ||
4780 | /* Load IT with the next display element from current_buffer. Value | |
4781 | is zero if end of buffer reached. IT->stop_charpos is the next | |
4782 | position at which to stop and check for text properties or buffer | |
4783 | end. */ | |
4784 | ||
4785 | static int | |
4786 | next_element_from_buffer (it) | |
4787 | struct it *it; | |
4788 | { | |
4789 | int success_p = 1; | |
4790 | ||
4791 | /* Check this assumption, otherwise, we would never enter the | |
4792 | if-statement, below. */ | |
4793 | xassert (IT_CHARPOS (*it) >= BEGV | |
4794 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
4795 | ||
4796 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
4797 | { | |
4798 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4799 | { | |
4800 | int overlay_strings_follow_p; | |
4801 | ||
4802 | /* End of the game, except when overlay strings follow that | |
4803 | haven't been returned yet. */ | |
4804 | if (it->overlay_strings_at_end_processed_p) | |
4805 | overlay_strings_follow_p = 0; | |
4806 | else | |
4807 | { | |
4808 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 4809 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
4810 | } |
4811 | ||
4812 | if (overlay_strings_follow_p) | |
4813 | success_p = get_next_display_element (it); | |
4814 | else | |
4815 | { | |
4816 | it->what = IT_EOB; | |
4817 | it->position = it->current.pos; | |
4818 | success_p = 0; | |
4819 | } | |
4820 | } | |
4821 | else | |
4822 | { | |
4823 | handle_stop (it); | |
4824 | return get_next_display_element (it); | |
4825 | } | |
4826 | } | |
4827 | else | |
4828 | { | |
4829 | /* No face changes, overlays etc. in sight, so just return a | |
4830 | character from current_buffer. */ | |
4831 | unsigned char *p; | |
4832 | ||
4833 | /* Maybe run the redisplay end trigger hook. Performance note: | |
4834 | This doesn't seem to cost measurable time. */ | |
4835 | if (it->redisplay_end_trigger_charpos | |
4836 | && it->glyph_row | |
4837 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
4838 | run_redisplay_end_trigger_hook (it); | |
4839 | ||
4840 | /* Get the next character, maybe multibyte. */ | |
4841 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 4842 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
4843 | { |
4844 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
4845 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 4846 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
4847 | } |
4848 | else | |
4849 | it->c = *p, it->len = 1; | |
4850 | ||
4851 | /* Record what we have and where it came from. */ | |
4852 | it->what = IT_CHARACTER;; | |
4853 | it->object = it->w->buffer; | |
4854 | it->position = it->current.pos; | |
4855 | ||
4856 | /* Normally we return the character found above, except when we | |
4857 | really want to return an ellipsis for selective display. */ | |
4858 | if (it->selective) | |
4859 | { | |
4860 | if (it->c == '\n') | |
4861 | { | |
4862 | /* A value of selective > 0 means hide lines indented more | |
4863 | than that number of columns. */ | |
4864 | if (it->selective > 0 | |
4865 | && IT_CHARPOS (*it) + 1 < ZV | |
4866 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
4867 | IT_BYTEPOS (*it) + 1, | |
4868 | it->selective)) | |
312246d1 | 4869 | { |
13f19968 | 4870 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
4871 | it->dpvec_char_len = -1; |
4872 | } | |
5f5c8ee5 GM |
4873 | } |
4874 | else if (it->c == '\r' && it->selective == -1) | |
4875 | { | |
4876 | /* A value of selective == -1 means that everything from the | |
4877 | CR to the end of the line is invisible, with maybe an | |
4878 | ellipsis displayed for it. */ | |
13f19968 | 4879 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4880 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4881 | } |
4882 | } | |
4883 | } | |
4884 | ||
4885 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4886 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4887 | return success_p; |
4888 | } | |
4889 | ||
4890 | ||
4891 | /* Run the redisplay end trigger hook for IT. */ | |
4892 | ||
4893 | static void | |
4894 | run_redisplay_end_trigger_hook (it) | |
4895 | struct it *it; | |
4896 | { | |
4897 | Lisp_Object args[3]; | |
4898 | ||
4899 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4900 | displaying something, or otherwise we should not run the hook. */ | |
4901 | xassert (it->glyph_row); | |
4902 | ||
4903 | /* Set up hook arguments. */ | |
4904 | args[0] = Qredisplay_end_trigger_functions; | |
4905 | args[1] = it->window; | |
4906 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4907 | it->redisplay_end_trigger_charpos = 0; | |
4908 | ||
4909 | /* Since we are *trying* to run these functions, don't try to run | |
4910 | them again, even if they get an error. */ | |
4911 | it->w->redisplay_end_trigger = Qnil; | |
4912 | Frun_hook_with_args (3, args); | |
4913 | ||
4914 | /* Notice if it changed the face of the character we are on. */ | |
4915 | handle_face_prop (it); | |
4916 | } | |
4917 | ||
4918 | ||
260a86a0 KH |
4919 | /* Deliver a composition display element. The iterator IT is already |
4920 | filled with composition information (done in | |
4921 | handle_composition_prop). Value is always 1. */ | |
4922 | ||
4923 | static int | |
4924 | next_element_from_composition (it) | |
4925 | struct it *it; | |
4926 | { | |
4927 | it->what = IT_COMPOSITION; | |
4928 | it->position = (STRINGP (it->string) | |
4929 | ? it->current.string_pos | |
4930 | : it->current.pos); | |
4931 | return 1; | |
4932 | } | |
4933 | ||
4934 | ||
5f5c8ee5 GM |
4935 | \f |
4936 | /*********************************************************************** | |
4937 | Moving an iterator without producing glyphs | |
4938 | ***********************************************************************/ | |
4939 | ||
4940 | /* Move iterator IT to a specified buffer or X position within one | |
4941 | line on the display without producing glyphs. | |
4942 | ||
4943 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
4944 | whichever is reached first. | |
4945 | ||
4946 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
4947 | ||
4948 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
4949 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
4950 | TO_X includes the amount by which a window is horizontally | |
4951 | scrolled. | |
4952 | ||
4953 | Value is | |
4954 | ||
4955 | MOVE_POS_MATCH_OR_ZV | |
4956 | - when TO_POS or ZV was reached. | |
4957 | ||
4958 | MOVE_X_REACHED | |
4959 | -when TO_X was reached before TO_POS or ZV were reached. | |
4960 | ||
4961 | MOVE_LINE_CONTINUED | |
4962 | - when we reached the end of the display area and the line must | |
4963 | be continued. | |
4964 | ||
4965 | MOVE_LINE_TRUNCATED | |
4966 | - when we reached the end of the display area and the line is | |
4967 | truncated. | |
4968 | ||
4969 | MOVE_NEWLINE_OR_CR | |
4970 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
4971 | display is on. */ | |
4972 | ||
701552dd | 4973 | static enum move_it_result |
5f5c8ee5 GM |
4974 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
4975 | struct it *it; | |
4976 | int to_charpos, to_x, op; | |
4977 | { | |
4978 | enum move_it_result result = MOVE_UNDEFINED; | |
4979 | struct glyph_row *saved_glyph_row; | |
4980 | ||
4981 | /* Don't produce glyphs in produce_glyphs. */ | |
4982 | saved_glyph_row = it->glyph_row; | |
4983 | it->glyph_row = NULL; | |
4984 | ||
5f5c8ee5 GM |
4985 | while (1) |
4986 | { | |
ae26e27d | 4987 | int x, i, ascent = 0, descent = 0; |
5f5c8ee5 GM |
4988 | |
4989 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4990 | if (!get_next_display_element (it) | |
4991 | || ((op & MOVE_TO_POS) != 0 | |
4992 | && BUFFERP (it->object) | |
4993 | && IT_CHARPOS (*it) >= to_charpos)) | |
4994 | { | |
4995 | result = MOVE_POS_MATCH_OR_ZV; | |
4996 | break; | |
4997 | } | |
4998 | ||
4999 | /* The call to produce_glyphs will get the metrics of the | |
5000 | display element IT is loaded with. We record in x the | |
5001 | x-position before this display element in case it does not | |
5002 | fit on the line. */ | |
5003 | x = it->current_x; | |
47589c8c GM |
5004 | |
5005 | /* Remember the line height so far in case the next element doesn't | |
5006 | fit on the line. */ | |
5007 | if (!it->truncate_lines_p) | |
5008 | { | |
5009 | ascent = it->max_ascent; | |
5010 | descent = it->max_descent; | |
5011 | } | |
5012 | ||
5f5c8ee5 GM |
5013 | PRODUCE_GLYPHS (it); |
5014 | ||
5015 | if (it->area != TEXT_AREA) | |
5016 | { | |
cafafe0b | 5017 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5018 | continue; |
5019 | } | |
5020 | ||
5021 | /* The number of glyphs we get back in IT->nglyphs will normally | |
5022 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
5023 | character on a terminal frame, or (iii) a line end. For the | |
5024 | second case, IT->nglyphs - 1 padding glyphs will be present | |
5025 | (on X frames, there is only one glyph produced for a | |
5026 | composite character. | |
5027 | ||
5028 | The behavior implemented below means, for continuation lines, | |
5029 | that as many spaces of a TAB as fit on the current line are | |
5030 | displayed there. For terminal frames, as many glyphs of a | |
5031 | multi-glyph character are displayed in the current line, too. | |
5032 | This is what the old redisplay code did, and we keep it that | |
5033 | way. Under X, the whole shape of a complex character must | |
5034 | fit on the line or it will be completely displayed in the | |
5035 | next line. | |
5036 | ||
5037 | Note that both for tabs and padding glyphs, all glyphs have | |
5038 | the same width. */ | |
5039 | if (it->nglyphs) | |
5040 | { | |
5041 | /* More than one glyph or glyph doesn't fit on line. All | |
5042 | glyphs have the same width. */ | |
5043 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
5044 | int new_x; | |
5045 | ||
5046 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
5047 | { | |
5048 | new_x = x + single_glyph_width; | |
5049 | ||
5050 | /* We want to leave anything reaching TO_X to the caller. */ | |
5051 | if ((op & MOVE_TO_X) && new_x > to_x) | |
5052 | { | |
5053 | it->current_x = x; | |
5054 | result = MOVE_X_REACHED; | |
5055 | break; | |
5056 | } | |
5057 | else if (/* Lines are continued. */ | |
5058 | !it->truncate_lines_p | |
5059 | && (/* And glyph doesn't fit on the line. */ | |
5060 | new_x > it->last_visible_x | |
5061 | /* Or it fits exactly and we're on a window | |
5062 | system frame. */ | |
5063 | || (new_x == it->last_visible_x | |
5064 | && FRAME_WINDOW_P (it->f)))) | |
5065 | { | |
5066 | if (/* IT->hpos == 0 means the very first glyph | |
5067 | doesn't fit on the line, e.g. a wide image. */ | |
5068 | it->hpos == 0 | |
5069 | || (new_x == it->last_visible_x | |
5070 | && FRAME_WINDOW_P (it->f))) | |
5071 | { | |
5072 | ++it->hpos; | |
5073 | it->current_x = new_x; | |
5074 | if (i == it->nglyphs - 1) | |
cafafe0b | 5075 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5076 | } |
5077 | else | |
47589c8c GM |
5078 | { |
5079 | it->current_x = x; | |
5080 | it->max_ascent = ascent; | |
5081 | it->max_descent = descent; | |
5082 | } | |
5083 | ||
5084 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", | |
5085 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
5086 | result = MOVE_LINE_CONTINUED; |
5087 | break; | |
5088 | } | |
5089 | else if (new_x > it->first_visible_x) | |
5090 | { | |
5091 | /* Glyph is visible. Increment number of glyphs that | |
5092 | would be displayed. */ | |
5093 | ++it->hpos; | |
5094 | } | |
5095 | else | |
5096 | { | |
5097 | /* Glyph is completely off the left margin of the display | |
5098 | area. Nothing to do. */ | |
5099 | } | |
5100 | } | |
5101 | ||
5102 | if (result != MOVE_UNDEFINED) | |
5103 | break; | |
5104 | } | |
5105 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
5106 | { | |
5107 | /* Stop when TO_X specified and reached. This check is | |
5108 | necessary here because of lines consisting of a line end, | |
5109 | only. The line end will not produce any glyphs and we | |
5110 | would never get MOVE_X_REACHED. */ | |
5111 | xassert (it->nglyphs == 0); | |
5112 | result = MOVE_X_REACHED; | |
5113 | break; | |
5114 | } | |
5115 | ||
5116 | /* Is this a line end? If yes, we're done. */ | |
5117 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5118 | { | |
5119 | result = MOVE_NEWLINE_OR_CR; | |
5120 | break; | |
5121 | } | |
5122 | ||
5123 | /* The current display element has been consumed. Advance | |
5124 | to the next. */ | |
cafafe0b | 5125 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5126 | |
5127 | /* Stop if lines are truncated and IT's current x-position is | |
5128 | past the right edge of the window now. */ | |
5129 | if (it->truncate_lines_p | |
5130 | && it->current_x >= it->last_visible_x) | |
5131 | { | |
5132 | result = MOVE_LINE_TRUNCATED; | |
5133 | break; | |
5134 | } | |
5135 | } | |
5136 | ||
5137 | /* Restore the iterator settings altered at the beginning of this | |
5138 | function. */ | |
5139 | it->glyph_row = saved_glyph_row; | |
5140 | return result; | |
5141 | } | |
5142 | ||
5143 | ||
5144 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
5145 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
5146 | the description of enum move_operation_enum. | |
5147 | ||
5148 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
5149 | screen line, this function will set IT to the next position > | |
5150 | TO_CHARPOS. */ | |
5151 | ||
5152 | void | |
5153 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
5154 | struct it *it; | |
5155 | int to_charpos, to_x, to_y, to_vpos; | |
5156 | int op; | |
5157 | { | |
5158 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
5159 | int line_height; | |
47589c8c | 5160 | int reached = 0; |
5f5c8ee5 | 5161 | |
47589c8c | 5162 | for (;;) |
5f5c8ee5 GM |
5163 | { |
5164 | if (op & MOVE_TO_VPOS) | |
5165 | { | |
5166 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
5167 | start of the line TO_VPOS. */ | |
5168 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
5169 | { | |
5170 | if (it->vpos == to_vpos) | |
47589c8c GM |
5171 | { |
5172 | reached = 1; | |
5173 | break; | |
5174 | } | |
5175 | else | |
5176 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
5177 | } |
5178 | else | |
5179 | { | |
5180 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
5181 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
5182 | if (it->vpos == to_vpos) |
5183 | { | |
5184 | reached = 2; | |
5185 | break; | |
5186 | } | |
5187 | ||
5f5c8ee5 GM |
5188 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
5189 | ||
5190 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
5191 | { |
5192 | reached = 3; | |
5193 | break; | |
5194 | } | |
5f5c8ee5 GM |
5195 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
5196 | { | |
5197 | /* We have reached TO_X but not in the line we want. */ | |
5198 | skip = move_it_in_display_line_to (it, to_charpos, | |
5199 | -1, MOVE_TO_POS); | |
5200 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5201 | { |
5202 | reached = 4; | |
5203 | break; | |
5204 | } | |
5f5c8ee5 GM |
5205 | } |
5206 | } | |
5207 | } | |
5208 | else if (op & MOVE_TO_Y) | |
5209 | { | |
5210 | struct it it_backup; | |
5f5c8ee5 GM |
5211 | |
5212 | /* TO_Y specified means stop at TO_X in the line containing | |
5213 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
5214 | problem is that we can't really tell whether the line | |
5215 | contains TO_Y before we have completely scanned it, and | |
5216 | this may skip past TO_X. What we do is to first scan to | |
5217 | TO_X. | |
5218 | ||
5219 | If TO_X is not specified, use a TO_X of zero. The reason | |
5220 | is to make the outcome of this function more predictable. | |
5221 | If we didn't use TO_X == 0, we would stop at the end of | |
5222 | the line which is probably not what a caller would expect | |
5223 | to happen. */ | |
5224 | skip = move_it_in_display_line_to (it, to_charpos, | |
5225 | ((op & MOVE_TO_X) | |
5226 | ? to_x : 0), | |
5227 | (MOVE_TO_X | |
5228 | | (op & MOVE_TO_POS))); | |
5229 | ||
5230 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
5231 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5232 | { |
5233 | reached = 5; | |
5234 | break; | |
5235 | } | |
5f5c8ee5 GM |
5236 | |
5237 | /* If TO_X was reached, we would like to know whether TO_Y | |
5238 | is in the line. This can only be said if we know the | |
5239 | total line height which requires us to scan the rest of | |
5240 | the line. */ | |
5f5c8ee5 GM |
5241 | if (skip == MOVE_X_REACHED) |
5242 | { | |
5243 | it_backup = *it; | |
47589c8c | 5244 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5245 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
5246 | op & MOVE_TO_POS); | |
47589c8c | 5247 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5248 | } |
5249 | ||
5250 | /* Now, decide whether TO_Y is in this line. */ | |
5251 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 5252 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
5f5c8ee5 GM |
5253 | |
5254 | if (to_y >= it->current_y | |
5255 | && to_y < it->current_y + line_height) | |
5256 | { | |
5257 | if (skip == MOVE_X_REACHED) | |
5258 | /* If TO_Y is in this line and TO_X was reached above, | |
5259 | we scanned too far. We have to restore IT's settings | |
5260 | to the ones before skipping. */ | |
5261 | *it = it_backup; | |
47589c8c | 5262 | reached = 6; |
5f5c8ee5 GM |
5263 | } |
5264 | else if (skip == MOVE_X_REACHED) | |
5265 | { | |
5266 | skip = skip2; | |
5267 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 5268 | reached = 7; |
5f5c8ee5 GM |
5269 | } |
5270 | ||
47589c8c | 5271 | if (reached) |
5f5c8ee5 GM |
5272 | break; |
5273 | } | |
5274 | else | |
5275 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
5276 | ||
5277 | switch (skip) | |
5278 | { | |
5279 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
5280 | reached = 8; |
5281 | goto out; | |
5f5c8ee5 GM |
5282 | |
5283 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 5284 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5285 | it->continuation_lines_width = 0; |
5286 | break; | |
5287 | ||
5288 | case MOVE_LINE_TRUNCATED: | |
5289 | it->continuation_lines_width = 0; | |
312246d1 | 5290 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5291 | if ((op & MOVE_TO_POS) != 0 |
5292 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
5293 | { |
5294 | reached = 9; | |
5295 | goto out; | |
5296 | } | |
5f5c8ee5 GM |
5297 | break; |
5298 | ||
5299 | case MOVE_LINE_CONTINUED: | |
5300 | it->continuation_lines_width += it->current_x; | |
5301 | break; | |
5302 | ||
5303 | default: | |
5304 | abort (); | |
5305 | } | |
5306 | ||
5307 | /* Reset/increment for the next run. */ | |
5308 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
5309 | it->current_x = it->hpos = 0; | |
5310 | it->current_y += it->max_ascent + it->max_descent; | |
5311 | ++it->vpos; | |
5312 | last_height = it->max_ascent + it->max_descent; | |
5313 | last_max_ascent = it->max_ascent; | |
5314 | it->max_ascent = it->max_descent = 0; | |
5315 | } | |
47589c8c GM |
5316 | |
5317 | out: | |
5318 | ||
5319 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
5320 | } |
5321 | ||
5322 | ||
5323 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
5324 | ||
5325 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
5326 | means move IT backward to the preceding line start or BEGV. This | |
5327 | function may move over more than DY pixels if IT->current_y - DY | |
5328 | ends up in the middle of a line; in this case IT->current_y will be | |
5329 | set to the top of the line moved to. */ | |
5330 | ||
5331 | void | |
5332 | move_it_vertically_backward (it, dy) | |
5333 | struct it *it; | |
5334 | int dy; | |
5335 | { | |
79ddf6f7 GM |
5336 | int nlines, h; |
5337 | struct it it2, it3; | |
5f5c8ee5 GM |
5338 | int start_pos = IT_CHARPOS (*it); |
5339 | ||
5340 | xassert (dy >= 0); | |
5341 | ||
5342 | /* Estimate how many newlines we must move back. */ | |
5343 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
5344 | ||
5345 | /* Set the iterator's position that many lines back. */ | |
5346 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
5347 | back_to_previous_visible_line_start (it); | |
5348 | ||
5349 | /* Reseat the iterator here. When moving backward, we don't want | |
5350 | reseat to skip forward over invisible text, set up the iterator | |
5351 | to deliver from overlay strings at the new position etc. So, | |
5352 | use reseat_1 here. */ | |
5353 | reseat_1 (it, it->current.pos, 1); | |
5354 | ||
5355 | /* We are now surely at a line start. */ | |
5356 | it->current_x = it->hpos = 0; | |
5357 | ||
5358 | /* Move forward and see what y-distance we moved. First move to the | |
5359 | start of the next line so that we get its height. We need this | |
5360 | height to be able to tell whether we reached the specified | |
5361 | y-distance. */ | |
5362 | it2 = *it; | |
5363 | it2.max_ascent = it2.max_descent = 0; | |
5364 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
5365 | MOVE_TO_POS | MOVE_TO_VPOS); | |
5366 | xassert (IT_CHARPOS (*it) >= BEGV); | |
79ddf6f7 | 5367 | it3 = it2; |
47589c8c | 5368 | |
5f5c8ee5 GM |
5369 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
5370 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5371 | h = it2.current_y - it->current_y; | |
5372 | nlines = it2.vpos - it->vpos; | |
5373 | ||
5374 | /* Correct IT's y and vpos position. */ | |
5375 | it->vpos -= nlines; | |
5376 | it->current_y -= h; | |
5377 | ||
5378 | if (dy == 0) | |
5379 | { | |
5380 | /* DY == 0 means move to the start of the screen line. The | |
5381 | value of nlines is > 0 if continuation lines were involved. */ | |
5382 | if (nlines > 0) | |
5383 | move_it_by_lines (it, nlines, 1); | |
5384 | xassert (IT_CHARPOS (*it) <= start_pos); | |
5385 | } | |
5386 | else if (nlines) | |
5387 | { | |
5388 | /* The y-position we try to reach. Note that h has been | |
5389 | subtracted in front of the if-statement. */ | |
5390 | int target_y = it->current_y + h - dy; | |
79ddf6f7 GM |
5391 | int y0 = it3.current_y; |
5392 | int y1 = line_bottom_y (&it3); | |
5393 | int line_height = y1 - y0; | |
f7ccfc8c | 5394 | |
5f5c8ee5 GM |
5395 | /* If we did not reach target_y, try to move further backward if |
5396 | we can. If we moved too far backward, try to move forward. */ | |
5397 | if (target_y < it->current_y | |
79ddf6f7 GM |
5398 | /* This is heuristic. In a window that's 3 lines high, with |
5399 | a line height of 13 pixels each, recentering with point | |
5400 | on the bottom line will try to move -39/2 = 19 pixels | |
5401 | backward. Try to avoid moving into the first line. */ | |
798dbe1f | 5402 | && it->current_y - target_y > line_height / 3 * 2 |
5f5c8ee5 GM |
5403 | && IT_CHARPOS (*it) > BEGV) |
5404 | { | |
f7ccfc8c GM |
5405 | TRACE_MOVE ((stderr, " not far enough -> move_vert %d\n", |
5406 | target_y - it->current_y)); | |
5f5c8ee5 GM |
5407 | move_it_vertically (it, target_y - it->current_y); |
5408 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5409 | } | |
5410 | else if (target_y >= it->current_y + line_height | |
5411 | && IT_CHARPOS (*it) < ZV) | |
5412 | { | |
f7ccfc8c GM |
5413 | /* Should move forward by at least one line, maybe more. */ |
5414 | do | |
5415 | { | |
5416 | move_it_by_lines (it, 1, 1); | |
5417 | } | |
5418 | while (target_y >= line_bottom_y (it) && IT_CHARPOS (*it) < ZV); | |
5419 | ||
5f5c8ee5 GM |
5420 | xassert (IT_CHARPOS (*it) >= BEGV); |
5421 | } | |
5422 | } | |
5423 | } | |
5424 | ||
5425 | ||
5426 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
5427 | move backwards. DY = 0 means move to start of screen line. At the | |
5428 | end, IT will be on the start of a screen line. */ | |
5429 | ||
5430 | void | |
5431 | move_it_vertically (it, dy) | |
5432 | struct it *it; | |
5433 | int dy; | |
5434 | { | |
5435 | if (dy <= 0) | |
5436 | move_it_vertically_backward (it, -dy); | |
5437 | else if (dy > 0) | |
5438 | { | |
47589c8c | 5439 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
5440 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
5441 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 5442 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5443 | |
5444 | /* If buffer ends in ZV without a newline, move to the start of | |
5445 | the line to satisfy the post-condition. */ | |
5446 | if (IT_CHARPOS (*it) == ZV | |
5447 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
5448 | move_it_by_lines (it, 0, 0); | |
5449 | } | |
5450 | } | |
5451 | ||
5452 | ||
47fc2c10 GM |
5453 | /* Move iterator IT past the end of the text line it is in. */ |
5454 | ||
5455 | void | |
5456 | move_it_past_eol (it) | |
5457 | struct it *it; | |
5458 | { | |
5459 | enum move_it_result rc; | |
5460 | ||
5461 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); | |
5462 | if (rc == MOVE_NEWLINE_OR_CR) | |
5463 | set_iterator_to_next (it, 0); | |
5464 | } | |
5465 | ||
5466 | ||
2c79b732 GM |
5467 | #if 0 /* Currently not used. */ |
5468 | ||
5f5c8ee5 GM |
5469 | /* Return non-zero if some text between buffer positions START_CHARPOS |
5470 | and END_CHARPOS is invisible. IT->window is the window for text | |
5471 | property lookup. */ | |
5472 | ||
5473 | static int | |
5474 | invisible_text_between_p (it, start_charpos, end_charpos) | |
5475 | struct it *it; | |
5476 | int start_charpos, end_charpos; | |
5477 | { | |
5f5c8ee5 GM |
5478 | Lisp_Object prop, limit; |
5479 | int invisible_found_p; | |
5480 | ||
5481 | xassert (it != NULL && start_charpos <= end_charpos); | |
5482 | ||
5483 | /* Is text at START invisible? */ | |
5484 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
5485 | it->window); | |
5486 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
5487 | invisible_found_p = 1; | |
5488 | else | |
5489 | { | |
016b5642 MB |
5490 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
5491 | Qinvisible, Qnil, | |
5492 | make_number (end_charpos)); | |
5f5c8ee5 GM |
5493 | invisible_found_p = XFASTINT (limit) < end_charpos; |
5494 | } | |
5495 | ||
5496 | return invisible_found_p; | |
5f5c8ee5 GM |
5497 | } |
5498 | ||
2c79b732 GM |
5499 | #endif /* 0 */ |
5500 | ||
5f5c8ee5 GM |
5501 | |
5502 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
5503 | negative means move up. DVPOS == 0 means move to the start of the | |
5504 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
5505 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
5506 | ||
5507 | Further optimization ideas: If we would know that IT->f doesn't use | |
5508 | a face with proportional font, we could be faster for | |
5509 | truncate-lines nil. */ | |
5510 | ||
5511 | void | |
5512 | move_it_by_lines (it, dvpos, need_y_p) | |
5513 | struct it *it; | |
5514 | int dvpos, need_y_p; | |
5515 | { | |
5516 | struct position pos; | |
5517 | ||
5518 | if (!FRAME_WINDOW_P (it->f)) | |
5519 | { | |
5520 | struct text_pos textpos; | |
5521 | ||
5522 | /* We can use vmotion on frames without proportional fonts. */ | |
5523 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
5524 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
5525 | reseat (it, textpos, 1); | |
5526 | it->vpos += pos.vpos; | |
5527 | it->current_y += pos.vpos; | |
5528 | } | |
5529 | else if (dvpos == 0) | |
5530 | { | |
5531 | /* DVPOS == 0 means move to the start of the screen line. */ | |
5532 | move_it_vertically_backward (it, 0); | |
5533 | xassert (it->current_x == 0 && it->hpos == 0); | |
5534 | } | |
5535 | else if (dvpos > 0) | |
2c79b732 | 5536 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); |
5f5c8ee5 GM |
5537 | else |
5538 | { | |
5539 | struct it it2; | |
5540 | int start_charpos, i; | |
2c79b732 | 5541 | |
e8660d73 GM |
5542 | /* Start at the beginning of the screen line containing IT's |
5543 | position. */ | |
5544 | move_it_vertically_backward (it, 0); | |
b0e619b4 | 5545 | |
5f5c8ee5 GM |
5546 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
5547 | start_charpos = IT_CHARPOS (*it); | |
5548 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
5549 | back_to_previous_visible_line_start (it); | |
5550 | reseat (it, it->current.pos, 1); | |
5551 | it->current_x = it->hpos = 0; | |
5552 | ||
5553 | /* Above call may have moved too far if continuation lines | |
5554 | are involved. Scan forward and see if it did. */ | |
5555 | it2 = *it; | |
5556 | it2.vpos = it2.current_y = 0; | |
5557 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
5558 | it->vpos -= it2.vpos; | |
5559 | it->current_y -= it2.current_y; | |
5560 | it->current_x = it->hpos = 0; | |
5561 | ||
5562 | /* If we moved too far, move IT some lines forward. */ | |
5563 | if (it2.vpos > -dvpos) | |
5564 | { | |
5565 | int delta = it2.vpos + dvpos; | |
5566 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
5567 | } | |
5568 | } | |
5569 | } | |
5570 | ||
5571 | ||
5572 | \f | |
5573 | /*********************************************************************** | |
5574 | Messages | |
5575 | ***********************************************************************/ | |
5576 | ||
5577 | ||
937248bc GM |
5578 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
5579 | to *Messages*. */ | |
5580 | ||
5581 | void | |
5582 | add_to_log (format, arg1, arg2) | |
5583 | char *format; | |
5584 | Lisp_Object arg1, arg2; | |
5585 | { | |
5586 | Lisp_Object args[3]; | |
5587 | Lisp_Object msg, fmt; | |
5588 | char *buffer; | |
5589 | int len; | |
5590 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5591 | ||
ae794295 GM |
5592 | /* Do nothing if called asynchronously. Inserting text into |
5593 | a buffer may call after-change-functions and alike and | |
5594 | that would means running Lisp asynchronously. */ | |
5595 | if (handling_signal) | |
5596 | return; | |
5597 | ||
937248bc GM |
5598 | fmt = msg = Qnil; |
5599 | GCPRO4 (fmt, msg, arg1, arg2); | |
5600 | ||
5601 | args[0] = fmt = build_string (format); | |
5602 | args[1] = arg1; | |
5603 | args[2] = arg2; | |
6fc556fd | 5604 | msg = Fformat (3, args); |
937248bc GM |
5605 | |
5606 | len = STRING_BYTES (XSTRING (msg)) + 1; | |
5607 | buffer = (char *) alloca (len); | |
1e1e5daf | 5608 | bcopy (XSTRING (msg)->data, buffer, len); |
937248bc | 5609 | |
796184bc | 5610 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
5611 | UNGCPRO; |
5612 | } | |
5613 | ||
5614 | ||
5f5c8ee5 GM |
5615 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
5616 | ||
5617 | void | |
5618 | message_log_maybe_newline () | |
5619 | { | |
5620 | if (message_log_need_newline) | |
5621 | message_dolog ("", 0, 1, 0); | |
5622 | } | |
5623 | ||
5624 | ||
1e313f28 | 5625 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
5626 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
5627 | nonzero, means interpret the contents of M as multibyte. This | |
5628 | function calls low-level routines in order to bypass text property | |
5629 | hooks, etc. which might not be safe to run. */ | |
5630 | ||
5631 | void | |
1e313f28 | 5632 | message_dolog (m, nbytes, nlflag, multibyte) |
5f5c8ee5 | 5633 | char *m; |
1e313f28 | 5634 | int nbytes, nlflag, multibyte; |
5f5c8ee5 GM |
5635 | { |
5636 | if (!NILP (Vmessage_log_max)) | |
5637 | { | |
5638 | struct buffer *oldbuf; | |
5639 | Lisp_Object oldpoint, oldbegv, oldzv; | |
5640 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
5641 | int point_at_end = 0; | |
5642 | int zv_at_end = 0; | |
5643 | Lisp_Object old_deactivate_mark, tem; | |
6052529b | 5644 | struct gcpro gcpro1; |
5f5c8ee5 GM |
5645 | |
5646 | old_deactivate_mark = Vdeactivate_mark; | |
5647 | oldbuf = current_buffer; | |
6a94510a | 5648 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
5649 | current_buffer->undo_list = Qt; |
5650 | ||
b14bc55e RS |
5651 | oldpoint = message_dolog_marker1; |
5652 | set_marker_restricted (oldpoint, make_number (PT), Qnil); | |
5653 | oldbegv = message_dolog_marker2; | |
5654 | set_marker_restricted (oldbegv, make_number (BEGV), Qnil); | |
5655 | oldzv = message_dolog_marker3; | |
5656 | set_marker_restricted (oldzv, make_number (ZV), Qnil); | |
5657 | GCPRO1 (old_deactivate_mark); | |
5f5c8ee5 GM |
5658 | |
5659 | if (PT == Z) | |
5660 | point_at_end = 1; | |
5661 | if (ZV == Z) | |
5662 | zv_at_end = 1; | |
5663 | ||
5664 | BEGV = BEG; | |
5665 | BEGV_BYTE = BEG_BYTE; | |
5666 | ZV = Z; | |
5667 | ZV_BYTE = Z_BYTE; | |
5668 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5669 | ||
5670 | /* Insert the string--maybe converting multibyte to single byte | |
5671 | or vice versa, so that all the text fits the buffer. */ | |
5672 | if (multibyte | |
5673 | && NILP (current_buffer->enable_multibyte_characters)) | |
5674 | { | |
1e313f28 | 5675 | int i, c, char_bytes; |
5f5c8ee5 GM |
5676 | unsigned char work[1]; |
5677 | ||
5678 | /* Convert a multibyte string to single-byte | |
5679 | for the *Message* buffer. */ | |
1e313f28 | 5680 | for (i = 0; i < nbytes; i += nbytes) |
5f5c8ee5 | 5681 | { |
1e313f28 | 5682 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
5683 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
5684 | ? c | |
5685 | : multibyte_char_to_unibyte (c, Qnil)); | |
5686 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5687 | } | |
5688 | } | |
5689 | else if (! multibyte | |
5690 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
5691 | { | |
1e313f28 | 5692 | int i, c, char_bytes; |
5f5c8ee5 | 5693 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 5694 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
5695 | /* Convert a single-byte string to multibyte |
5696 | for the *Message* buffer. */ | |
1e313f28 | 5697 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
5698 | { |
5699 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
5700 | char_bytes = CHAR_STRING (c, str); |
5701 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
5702 | } |
5703 | } | |
1e313f28 GM |
5704 | else if (nbytes) |
5705 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
5706 | |
5707 | if (nlflag) | |
5708 | { | |
5709 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
5710 | insert_1 ("\n", 1, 1, 0, 0); | |
5711 | ||
5712 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
5713 | this_bol = PT; | |
5714 | this_bol_byte = PT_BYTE; | |
5715 | ||
b14bc55e RS |
5716 | /* See if this line duplicates the previous one. |
5717 | If so, combine duplicates. */ | |
5f5c8ee5 GM |
5718 | if (this_bol > BEG) |
5719 | { | |
5720 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
5721 | prev_bol = PT; | |
5722 | prev_bol_byte = PT_BYTE; | |
5723 | ||
5724 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
5725 | this_bol, this_bol_byte); | |
5726 | if (dup) | |
5727 | { | |
5728 | del_range_both (prev_bol, prev_bol_byte, | |
5729 | this_bol, this_bol_byte, 0); | |
5730 | if (dup > 1) | |
5731 | { | |
5732 | char dupstr[40]; | |
5733 | int duplen; | |
5734 | ||
5735 | /* If you change this format, don't forget to also | |
5736 | change message_log_check_duplicate. */ | |
5737 | sprintf (dupstr, " [%d times]", dup); | |
5738 | duplen = strlen (dupstr); | |
5739 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
5740 | insert_1 (dupstr, duplen, 1, 0, 1); | |
5741 | } | |
5742 | } | |
5743 | } | |
5744 | ||
b14bc55e RS |
5745 | /* If we have more than the desired maximum number of lines |
5746 | in the *Messages* buffer now, delete the oldest ones. | |
5747 | This is safe because we don't have undo in this buffer. */ | |
5748 | ||
5f5c8ee5 GM |
5749 | if (NATNUMP (Vmessage_log_max)) |
5750 | { | |
5751 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
5752 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
5753 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
5754 | } | |
5755 | } | |
5756 | BEGV = XMARKER (oldbegv)->charpos; | |
5757 | BEGV_BYTE = marker_byte_position (oldbegv); | |
5758 | ||
5759 | if (zv_at_end) | |
5760 | { | |
5761 | ZV = Z; | |
5762 | ZV_BYTE = Z_BYTE; | |
5763 | } | |
5764 | else | |
5765 | { | |
5766 | ZV = XMARKER (oldzv)->charpos; | |
5767 | ZV_BYTE = marker_byte_position (oldzv); | |
5768 | } | |
5769 | ||
5770 | if (point_at_end) | |
5771 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5772 | else | |
5773 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
5774 | Lisp code. */ | |
5775 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
5776 | XMARKER (oldpoint)->bytepos); | |
5777 | ||
5778 | UNGCPRO; | |
b14bc55e RS |
5779 | unchain_marker (oldpoint); |
5780 | unchain_marker (oldbegv); | |
5781 | unchain_marker (oldzv); | |
5f5c8ee5 GM |
5782 | |
5783 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
5784 | set_buffer_internal (oldbuf); | |
5785 | if (NILP (tem)) | |
5786 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
5787 | message_log_need_newline = !nlflag; | |
5788 | Vdeactivate_mark = old_deactivate_mark; | |
5789 | } | |
5790 | } | |
5791 | ||
5792 | ||
5793 | /* We are at the end of the buffer after just having inserted a newline. | |
5794 | (Note: We depend on the fact we won't be crossing the gap.) | |
5795 | Check to see if the most recent message looks a lot like the previous one. | |
5796 | Return 0 if different, 1 if the new one should just replace it, or a | |
5797 | value N > 1 if we should also append " [N times]". */ | |
5798 | ||
5799 | static int | |
5800 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
5801 | int prev_bol, this_bol; | |
5802 | int prev_bol_byte, this_bol_byte; | |
5803 | { | |
5804 | int i; | |
5805 | int len = Z_BYTE - 1 - this_bol_byte; | |
5806 | int seen_dots = 0; | |
5807 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
5808 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
5809 | ||
5810 | for (i = 0; i < len; i++) | |
5811 | { | |
509633e3 | 5812 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
5813 | seen_dots = 1; |
5814 | if (p1[i] != p2[i]) | |
5815 | return seen_dots; | |
5816 | } | |
5817 | p1 += len; | |
5818 | if (*p1 == '\n') | |
5819 | return 2; | |
5820 | if (*p1++ == ' ' && *p1++ == '[') | |
5821 | { | |
5822 | int n = 0; | |
5823 | while (*p1 >= '0' && *p1 <= '9') | |
5824 | n = n * 10 + *p1++ - '0'; | |
5825 | if (strncmp (p1, " times]\n", 8) == 0) | |
5826 | return n+1; | |
5827 | } | |
5828 | return 0; | |
5829 | } | |
5830 | ||
5831 | ||
1e313f28 GM |
5832 | /* Display an echo area message M with a specified length of NBYTES |
5833 | bytes. The string may include null characters. If M is 0, clear | |
5834 | out any existing message, and let the mini-buffer text show | |
5835 | through. | |
5f5c8ee5 GM |
5836 | |
5837 | The buffer M must continue to exist until after the echo area gets | |
5838 | cleared or some other message gets displayed there. This means do | |
5839 | not pass text that is stored in a Lisp string; do not pass text in | |
5840 | a buffer that was alloca'd. */ | |
5841 | ||
5842 | void | |
1e313f28 | 5843 | message2 (m, nbytes, multibyte) |
5f5c8ee5 | 5844 | char *m; |
1e313f28 | 5845 | int nbytes; |
5f5c8ee5 GM |
5846 | int multibyte; |
5847 | { | |
5848 | /* First flush out any partial line written with print. */ | |
5849 | message_log_maybe_newline (); | |
5850 | if (m) | |
1e313f28 GM |
5851 | message_dolog (m, nbytes, 1, multibyte); |
5852 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5853 | } |
5854 | ||
5855 | ||
5856 | /* The non-logging counterpart of message2. */ | |
5857 | ||
5858 | void | |
1e313f28 | 5859 | message2_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5860 | char *m; |
1e313f28 | 5861 | int nbytes; |
5f5c8ee5 | 5862 | { |
886bd6f2 | 5863 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5864 | message_enable_multibyte = multibyte; |
5865 | ||
5866 | if (noninteractive) | |
5867 | { | |
5868 | if (noninteractive_need_newline) | |
5869 | putc ('\n', stderr); | |
5870 | noninteractive_need_newline = 0; | |
5871 | if (m) | |
1e313f28 | 5872 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
5873 | if (cursor_in_echo_area == 0) |
5874 | fprintf (stderr, "\n"); | |
5875 | fflush (stderr); | |
5876 | } | |
5877 | /* A null message buffer means that the frame hasn't really been | |
5878 | initialized yet. Error messages get reported properly by | |
5879 | cmd_error, so this must be just an informative message; toss it. */ | |
5880 | else if (INTERACTIVE | |
886bd6f2 GM |
5881 | && sf->glyphs_initialized_p |
5882 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5883 | { |
5884 | Lisp_Object mini_window; | |
5885 | struct frame *f; | |
5886 | ||
5887 | /* Get the frame containing the mini-buffer | |
5888 | that the selected frame is using. */ | |
886bd6f2 | 5889 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5890 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5891 | ||
5892 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5893 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
5894 | && ! FRAME_VISIBLE_P (f)) |
5895 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
5896 | ||
5897 | if (m) | |
5898 | { | |
1e313f28 | 5899 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
5900 | if (minibuffer_auto_raise) |
5901 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5902 | } | |
5903 | else | |
c6e89d6c | 5904 | clear_message (1, 1); |
5f5c8ee5 | 5905 | |
c6e89d6c | 5906 | do_pending_window_change (0); |
5f5c8ee5 | 5907 | echo_area_display (1); |
c6e89d6c | 5908 | do_pending_window_change (0); |
5f5c8ee5 GM |
5909 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5910 | (*frame_up_to_date_hook) (f); | |
5911 | } | |
5912 | } | |
5913 | ||
5914 | ||
c6e89d6c GM |
5915 | /* Display an echo area message M with a specified length of NBYTES |
5916 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
5917 | string, clear out any existing message, and let the mini-buffer |
5918 | text show through. */ | |
5919 | ||
5920 | void | |
c6e89d6c | 5921 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 5922 | Lisp_Object m; |
c6e89d6c | 5923 | int nbytes; |
5f5c8ee5 GM |
5924 | int multibyte; |
5925 | { | |
5926 | struct gcpro gcpro1; | |
5927 | ||
5928 | GCPRO1 (m); | |
5929 | ||
5930 | /* First flush out any partial line written with print. */ | |
5931 | message_log_maybe_newline (); | |
5932 | if (STRINGP (m)) | |
c6e89d6c GM |
5933 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
5934 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5935 | |
5936 | UNGCPRO; | |
5937 | } | |
5938 | ||
5939 | ||
5940 | /* The non-logging version of message3. */ | |
5941 | ||
5942 | void | |
c6e89d6c | 5943 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5944 | Lisp_Object m; |
c6e89d6c | 5945 | int nbytes, multibyte; |
5f5c8ee5 | 5946 | { |
886bd6f2 | 5947 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5948 | message_enable_multibyte = multibyte; |
5949 | ||
5950 | if (noninteractive) | |
5951 | { | |
5952 | if (noninteractive_need_newline) | |
5953 | putc ('\n', stderr); | |
5954 | noninteractive_need_newline = 0; | |
5955 | if (STRINGP (m)) | |
c6e89d6c | 5956 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
5957 | if (cursor_in_echo_area == 0) |
5958 | fprintf (stderr, "\n"); | |
5959 | fflush (stderr); | |
5960 | } | |
5961 | /* A null message buffer means that the frame hasn't really been | |
5962 | initialized yet. Error messages get reported properly by | |
5963 | cmd_error, so this must be just an informative message; toss it. */ | |
5964 | else if (INTERACTIVE | |
886bd6f2 GM |
5965 | && sf->glyphs_initialized_p |
5966 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5967 | { |
5968 | Lisp_Object mini_window; | |
c6e89d6c | 5969 | Lisp_Object frame; |
5f5c8ee5 GM |
5970 | struct frame *f; |
5971 | ||
5972 | /* Get the frame containing the mini-buffer | |
5973 | that the selected frame is using. */ | |
886bd6f2 | 5974 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5975 | frame = XWINDOW (mini_window)->frame; |
5976 | f = XFRAME (frame); | |
5f5c8ee5 GM |
5977 | |
5978 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5979 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
5980 | && !FRAME_VISIBLE_P (f)) |
5981 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 5982 | |
c6e89d6c | 5983 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 5984 | { |
c6e89d6c | 5985 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
5986 | if (minibuffer_auto_raise) |
5987 | Fraise_frame (frame); | |
5f5c8ee5 GM |
5988 | } |
5989 | else | |
c6e89d6c | 5990 | clear_message (1, 1); |
5f5c8ee5 | 5991 | |
c6e89d6c | 5992 | do_pending_window_change (0); |
5f5c8ee5 | 5993 | echo_area_display (1); |
c6e89d6c | 5994 | do_pending_window_change (0); |
5f5c8ee5 GM |
5995 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5996 | (*frame_up_to_date_hook) (f); | |
5997 | } | |
5998 | } | |
5999 | ||
6000 | ||
6001 | /* Display a null-terminated echo area message M. If M is 0, clear | |
6002 | out any existing message, and let the mini-buffer text show through. | |
6003 | ||
6004 | The buffer M must continue to exist until after the echo area gets | |
6005 | cleared or some other message gets displayed there. Do not pass | |
6006 | text that is stored in a Lisp string. Do not pass text in a buffer | |
6007 | that was alloca'd. */ | |
6008 | ||
6009 | void | |
6010 | message1 (m) | |
6011 | char *m; | |
6012 | { | |
6013 | message2 (m, (m ? strlen (m) : 0), 0); | |
6014 | } | |
6015 | ||
6016 | ||
6017 | /* The non-logging counterpart of message1. */ | |
6018 | ||
6019 | void | |
6020 | message1_nolog (m) | |
6021 | char *m; | |
6022 | { | |
6023 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
6024 | } | |
6025 | ||
6026 | /* Display a message M which contains a single %s | |
6027 | which gets replaced with STRING. */ | |
6028 | ||
6029 | void | |
6030 | message_with_string (m, string, log) | |
6031 | char *m; | |
6032 | Lisp_Object string; | |
6033 | int log; | |
6034 | { | |
6035 | if (noninteractive) | |
6036 | { | |
6037 | if (m) | |
6038 | { | |
6039 | if (noninteractive_need_newline) | |
6040 | putc ('\n', stderr); | |
6041 | noninteractive_need_newline = 0; | |
6042 | fprintf (stderr, m, XSTRING (string)->data); | |
6043 | if (cursor_in_echo_area == 0) | |
6044 | fprintf (stderr, "\n"); | |
6045 | fflush (stderr); | |
6046 | } | |
6047 | } | |
6048 | else if (INTERACTIVE) | |
6049 | { | |
6050 | /* The frame whose minibuffer we're going to display the message on. | |
6051 | It may be larger than the selected frame, so we need | |
6052 | to use its buffer, not the selected frame's buffer. */ | |
6053 | Lisp_Object mini_window; | |
886bd6f2 | 6054 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6055 | |
6056 | /* Get the frame containing the minibuffer | |
6057 | that the selected frame is using. */ | |
886bd6f2 | 6058 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6059 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6060 | ||
6061 | /* A null message buffer means that the frame hasn't really been | |
6062 | initialized yet. Error messages get reported properly by | |
6063 | cmd_error, so this must be just an informative message; toss it. */ | |
6064 | if (FRAME_MESSAGE_BUF (f)) | |
6065 | { | |
eb484132 GM |
6066 | Lisp_Object args[2], message; |
6067 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 6068 | |
eb484132 GM |
6069 | args[0] = build_string (m); |
6070 | args[1] = message = string; | |
6071 | GCPRO2 (args, message); | |
6072 | gcpro1.nvars = 2; | |
6073 | ||
6074 | message = Fformat (2, args); | |
5f5c8ee5 GM |
6075 | |
6076 | if (log) | |
eb484132 GM |
6077 | message3 (message, STRING_BYTES (XSTRING (message)), |
6078 | STRING_MULTIBYTE (message)); | |
5f5c8ee5 | 6079 | else |
eb484132 GM |
6080 | message3_nolog (message, STRING_BYTES (XSTRING (message)), |
6081 | STRING_MULTIBYTE (message)); | |
6082 | ||
6083 | UNGCPRO; | |
5f5c8ee5 GM |
6084 | |
6085 | /* Print should start at the beginning of the message | |
6086 | buffer next time. */ | |
6087 | message_buf_print = 0; | |
6088 | } | |
6089 | } | |
6090 | } | |
6091 | ||
6092 | ||
5f5c8ee5 GM |
6093 | /* Dump an informative message to the minibuf. If M is 0, clear out |
6094 | any existing message, and let the mini-buffer text show through. */ | |
6095 | ||
6096 | /* VARARGS 1 */ | |
6097 | void | |
6098 | message (m, a1, a2, a3) | |
6099 | char *m; | |
6100 | EMACS_INT a1, a2, a3; | |
6101 | { | |
6102 | if (noninteractive) | |
6103 | { | |
6104 | if (m) | |
6105 | { | |
6106 | if (noninteractive_need_newline) | |
6107 | putc ('\n', stderr); | |
6108 | noninteractive_need_newline = 0; | |
6109 | fprintf (stderr, m, a1, a2, a3); | |
6110 | if (cursor_in_echo_area == 0) | |
6111 | fprintf (stderr, "\n"); | |
6112 | fflush (stderr); | |
6113 | } | |
6114 | } | |
6115 | else if (INTERACTIVE) | |
6116 | { | |
6117 | /* The frame whose mini-buffer we're going to display the message | |
6118 | on. It may be larger than the selected frame, so we need to | |
6119 | use its buffer, not the selected frame's buffer. */ | |
6120 | Lisp_Object mini_window; | |
886bd6f2 | 6121 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6122 | |
6123 | /* Get the frame containing the mini-buffer | |
6124 | that the selected frame is using. */ | |
886bd6f2 | 6125 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6126 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6127 | ||
6128 | /* A null message buffer means that the frame hasn't really been | |
6129 | initialized yet. Error messages get reported properly by | |
6130 | cmd_error, so this must be just an informative message; toss | |
6131 | it. */ | |
6132 | if (FRAME_MESSAGE_BUF (f)) | |
6133 | { | |
6134 | if (m) | |
6135 | { | |
6136 | int len; | |
6137 | #ifdef NO_ARG_ARRAY | |
6138 | char *a[3]; | |
6139 | a[0] = (char *) a1; | |
6140 | a[1] = (char *) a2; | |
6141 | a[2] = (char *) a3; | |
6142 | ||
6143 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6144 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6145 | #else | |
6146 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6147 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
6148 | (char **) &a1); | |
6149 | #endif /* NO_ARG_ARRAY */ | |
6150 | ||
6151 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
6152 | } | |
6153 | else | |
6154 | message1 (0); | |
6155 | ||
6156 | /* Print should start at the beginning of the message | |
6157 | buffer next time. */ | |
6158 | message_buf_print = 0; | |
6159 | } | |
6160 | } | |
6161 | } | |
6162 | ||
6163 | ||
6164 | /* The non-logging version of message. */ | |
6165 | ||
6166 | void | |
6167 | message_nolog (m, a1, a2, a3) | |
6168 | char *m; | |
6169 | EMACS_INT a1, a2, a3; | |
6170 | { | |
6171 | Lisp_Object old_log_max; | |
6172 | old_log_max = Vmessage_log_max; | |
6173 | Vmessage_log_max = Qnil; | |
6174 | message (m, a1, a2, a3); | |
6175 | Vmessage_log_max = old_log_max; | |
6176 | } | |
6177 | ||
6178 | ||
c6e89d6c GM |
6179 | /* Display the current message in the current mini-buffer. This is |
6180 | only called from error handlers in process.c, and is not time | |
6181 | critical. */ | |
5f5c8ee5 GM |
6182 | |
6183 | void | |
6184 | update_echo_area () | |
6185 | { | |
c6e89d6c GM |
6186 | if (!NILP (echo_area_buffer[0])) |
6187 | { | |
6188 | Lisp_Object string; | |
6189 | string = Fcurrent_message (); | |
6190 | message3 (string, XSTRING (string)->size, | |
6191 | !NILP (current_buffer->enable_multibyte_characters)); | |
6192 | } | |
6193 | } | |
6194 | ||
6195 | ||
5bcfeb49 GM |
6196 | /* Make sure echo area buffers in echo_buffers[] are life. If they |
6197 | aren't, make new ones. */ | |
6198 | ||
6199 | static void | |
6200 | ensure_echo_area_buffers () | |
6201 | { | |
6202 | int i; | |
6203 | ||
6204 | for (i = 0; i < 2; ++i) | |
6205 | if (!BUFFERP (echo_buffer[i]) | |
6206 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
6207 | { | |
6208 | char name[30]; | |
ff3d9573 GM |
6209 | Lisp_Object old_buffer; |
6210 | int j; | |
6211 | ||
6212 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
6213 | sprintf (name, " *Echo Area %d*", i); |
6214 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 6215 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
6216 | |
6217 | for (j = 0; j < 2; ++j) | |
6218 | if (EQ (old_buffer, echo_area_buffer[j])) | |
6219 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
6220 | } |
6221 | } | |
6222 | ||
6223 | ||
23a96c77 | 6224 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
6225 | echo_area_buffer as current buffer. |
6226 | ||
6227 | WHICH zero means use the current message buffer | |
6228 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
6229 | from echo_buffer[] and clear it. | |
6230 | ||
6231 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
6232 | suitable buffer from echo_buffer[] and clear it. | |
6233 | ||
6234 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
6235 | that the current message becomes the last displayed one, make | |
6236 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
6237 | ||
4b41cebb | 6238 | Value is what FN returns. */ |
c6e89d6c GM |
6239 | |
6240 | static int | |
23a96c77 | 6241 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
6242 | struct window *w; |
6243 | int which; | |
23dd2d97 KR |
6244 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
6245 | EMACS_INT a1; | |
6246 | Lisp_Object a2; | |
6247 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6248 | { |
6249 | Lisp_Object buffer; | |
15e26c76 | 6250 | int this_one, the_other, clear_buffer_p, rc; |
2d27dae2 | 6251 | int count = BINDING_STACK_SIZE (); |
c6e89d6c GM |
6252 | |
6253 | /* If buffers aren't life, make new ones. */ | |
5bcfeb49 | 6254 | ensure_echo_area_buffers (); |
c6e89d6c GM |
6255 | |
6256 | clear_buffer_p = 0; | |
6257 | ||
6258 | if (which == 0) | |
6259 | this_one = 0, the_other = 1; | |
6260 | else if (which > 0) | |
6261 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 6262 | else |
c6e89d6c GM |
6263 | { |
6264 | this_one = 0, the_other = 1; | |
6265 | clear_buffer_p = 1; | |
6266 | ||
6267 | /* We need a fresh one in case the current echo buffer equals | |
6268 | the one containing the last displayed echo area message. */ | |
6269 | if (!NILP (echo_area_buffer[this_one]) | |
6270 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
6271 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
6272 | } |
6273 | ||
6274 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
6275 | have one. */ | |
6276 | if (NILP (echo_area_buffer[this_one])) | |
6277 | { | |
6278 | echo_area_buffer[this_one] | |
6279 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
6280 | ? echo_buffer[the_other] | |
6281 | : echo_buffer[this_one]); | |
6282 | clear_buffer_p = 1; | |
6283 | } | |
6284 | ||
6285 | buffer = echo_area_buffer[this_one]; | |
6286 | ||
1013f4e3 GM |
6287 | /* Don't get confused by reusing the buffer used for echoing |
6288 | for a different purpose. */ | |
032906b1 | 6289 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
6290 | cancel_echoing (); |
6291 | ||
c6e89d6c GM |
6292 | record_unwind_protect (unwind_with_echo_area_buffer, |
6293 | with_echo_area_buffer_unwind_data (w)); | |
6294 | ||
6295 | /* Make the echo area buffer current. Note that for display | |
6296 | purposes, it is not necessary that the displayed window's buffer | |
6297 | == current_buffer, except for text property lookup. So, let's | |
6298 | only set that buffer temporarily here without doing a full | |
6299 | Fset_window_buffer. We must also change w->pointm, though, | |
6300 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
6301 | aborts. */ | |
9142dd5b | 6302 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
6303 | if (w) |
6304 | { | |
6305 | w->buffer = buffer; | |
6306 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
6307 | } | |
ad4f174e | 6308 | |
c6e89d6c GM |
6309 | current_buffer->undo_list = Qt; |
6310 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 6311 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 6312 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
6313 | |
6314 | if (clear_buffer_p && Z > BEG) | |
6315 | del_range (BEG, Z); | |
6316 | ||
6317 | xassert (BEGV >= BEG); | |
6318 | xassert (ZV <= Z && ZV >= BEGV); | |
6319 | ||
23a96c77 | 6320 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
6321 | |
6322 | xassert (BEGV >= BEG); | |
6323 | xassert (ZV <= Z && ZV >= BEGV); | |
6324 | ||
6325 | unbind_to (count, Qnil); | |
6326 | return rc; | |
5f5c8ee5 GM |
6327 | } |
6328 | ||
6329 | ||
c6e89d6c GM |
6330 | /* Save state that should be preserved around the call to the function |
6331 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 6332 | |
c6e89d6c GM |
6333 | static Lisp_Object |
6334 | with_echo_area_buffer_unwind_data (w) | |
6335 | struct window *w; | |
5f5c8ee5 | 6336 | { |
c6e89d6c GM |
6337 | int i = 0; |
6338 | Lisp_Object vector; | |
5f5c8ee5 | 6339 | |
c6e89d6c GM |
6340 | /* Reduce consing by keeping one vector in |
6341 | Vwith_echo_area_save_vector. */ | |
6342 | vector = Vwith_echo_area_save_vector; | |
6343 | Vwith_echo_area_save_vector = Qnil; | |
6344 | ||
6345 | if (NILP (vector)) | |
9142dd5b | 6346 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c | 6347 | |
a61b7058 GM |
6348 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
6349 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
6350 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
c6e89d6c GM |
6351 | |
6352 | if (w) | |
6353 | { | |
a61b7058 GM |
6354 | XSETWINDOW (AREF (vector, i), w); ++i; |
6355 | AREF (vector, i) = w->buffer; ++i; | |
6356 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
6357 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
6358 | } |
6359 | else | |
6360 | { | |
6361 | int end = i + 4; | |
a61b7058 GM |
6362 | for (; i < end; ++i) |
6363 | AREF (vector, i) = Qnil; | |
c6e89d6c | 6364 | } |
5f5c8ee5 | 6365 | |
a61b7058 | 6366 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
6367 | return vector; |
6368 | } | |
5f5c8ee5 | 6369 | |
5f5c8ee5 | 6370 | |
c6e89d6c GM |
6371 | /* Restore global state from VECTOR which was created by |
6372 | with_echo_area_buffer_unwind_data. */ | |
6373 | ||
6374 | static Lisp_Object | |
6375 | unwind_with_echo_area_buffer (vector) | |
6376 | Lisp_Object vector; | |
6377 | { | |
bbbf6d06 GM |
6378 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
6379 | Vdeactivate_mark = AREF (vector, 1); | |
6380 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 6381 | |
bbbf6d06 | 6382 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
6383 | { |
6384 | struct window *w; | |
6385 | Lisp_Object buffer, charpos, bytepos; | |
6386 | ||
bbbf6d06 GM |
6387 | w = XWINDOW (AREF (vector, 3)); |
6388 | buffer = AREF (vector, 4); | |
6389 | charpos = AREF (vector, 5); | |
6390 | bytepos = AREF (vector, 6); | |
c6e89d6c GM |
6391 | |
6392 | w->buffer = buffer; | |
6393 | set_marker_both (w->pointm, buffer, | |
6394 | XFASTINT (charpos), XFASTINT (bytepos)); | |
6395 | } | |
6396 | ||
6397 | Vwith_echo_area_save_vector = vector; | |
6398 | return Qnil; | |
6399 | } | |
6400 | ||
6401 | ||
6402 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
6403 | non-zero means we will print multibyte. */ | |
6404 | ||
6405 | void | |
6406 | setup_echo_area_for_printing (multibyte_p) | |
6407 | int multibyte_p; | |
6408 | { | |
5bcfeb49 GM |
6409 | ensure_echo_area_buffers (); |
6410 | ||
c6e89d6c GM |
6411 | if (!message_buf_print) |
6412 | { | |
6413 | /* A message has been output since the last time we printed. | |
6414 | Choose a fresh echo area buffer. */ | |
6415 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
6416 | echo_area_buffer[0] = echo_buffer[1]; | |
6417 | else | |
6418 | echo_area_buffer[0] = echo_buffer[0]; | |
6419 | ||
6420 | /* Switch to that buffer and clear it. */ | |
6421 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 6422 | current_buffer->truncate_lines = Qnil; |
bbbf6d06 | 6423 | |
c6e89d6c | 6424 | if (Z > BEG) |
bbbf6d06 GM |
6425 | { |
6426 | int count = BINDING_STACK_SIZE (); | |
6427 | specbind (Qinhibit_read_only, Qt); | |
6428 | del_range (BEG, Z); | |
6429 | unbind_to (count, Qnil); | |
6430 | } | |
c6e89d6c GM |
6431 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6432 | ||
6433 | /* Set up the buffer for the multibyteness we need. */ | |
6434 | if (multibyte_p | |
6435 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6436 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
6437 | ||
6438 | /* Raise the frame containing the echo area. */ | |
6439 | if (minibuffer_auto_raise) | |
6440 | { | |
886bd6f2 | 6441 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6442 | Lisp_Object mini_window; |
886bd6f2 | 6443 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6444 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
6445 | } | |
6446 | ||
8a4e3c0c | 6447 | message_log_maybe_newline (); |
c6e89d6c GM |
6448 | message_buf_print = 1; |
6449 | } | |
fa77249f GM |
6450 | else |
6451 | { | |
6452 | if (NILP (echo_area_buffer[0])) | |
6453 | { | |
6454 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
6455 | echo_area_buffer[0] = echo_buffer[1]; | |
6456 | else | |
6457 | echo_area_buffer[0] = echo_buffer[0]; | |
6458 | } | |
6459 | ||
6460 | if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
ab2c5f0a GM |
6461 | { |
6462 | /* Someone switched buffers between print requests. */ | |
6463 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
6464 | current_buffer->truncate_lines = Qnil; | |
6465 | } | |
fa77249f | 6466 | } |
c6e89d6c GM |
6467 | } |
6468 | ||
6469 | ||
dd2eb166 GM |
6470 | /* Display an echo area message in window W. Value is non-zero if W's |
6471 | height is changed. If display_last_displayed_message_p is | |
6472 | non-zero, display the message that was last displayed, otherwise | |
6473 | display the current message. */ | |
c6e89d6c GM |
6474 | |
6475 | static int | |
6476 | display_echo_area (w) | |
6477 | struct window *w; | |
6478 | { | |
25edb08f GM |
6479 | int i, no_message_p, window_height_changed_p, count; |
6480 | ||
6481 | /* Temporarily disable garbage collections while displaying the echo | |
6482 | area. This is done because a GC can print a message itself. | |
6483 | That message would modify the echo area buffer's contents while a | |
6484 | redisplay of the buffer is going on, and seriously confuse | |
6485 | redisplay. */ | |
6486 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
6487 | |
6488 | /* If there is no message, we must call display_echo_area_1 | |
6489 | nevertheless because it resizes the window. But we will have to | |
6490 | reset the echo_area_buffer in question to nil at the end because | |
6491 | with_echo_area_buffer will sets it to an empty buffer. */ | |
6492 | i = display_last_displayed_message_p ? 1 : 0; | |
6493 | no_message_p = NILP (echo_area_buffer[i]); | |
6494 | ||
6495 | window_height_changed_p | |
6496 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 6497 | display_echo_area_1, |
23dd2d97 | 6498 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
6499 | |
6500 | if (no_message_p) | |
6501 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
6502 | |
6503 | unbind_to (count, Qnil); | |
dd2eb166 | 6504 | return window_height_changed_p; |
c6e89d6c GM |
6505 | } |
6506 | ||
6507 | ||
6508 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
6509 | contains the current echo area message in window W, a mini-window, |
6510 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
6511 | Change the height of W so that all of the message is displayed. |
6512 | Value is non-zero if height of W was changed. */ | |
6513 | ||
6514 | static int | |
23a96c77 | 6515 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6516 | EMACS_INT a1; |
6517 | Lisp_Object a2; | |
6518 | EMACS_INT a3, a4; | |
c6e89d6c | 6519 | { |
23a96c77 | 6520 | struct window *w = (struct window *) a1; |
c6e89d6c | 6521 | Lisp_Object window; |
c6e89d6c GM |
6522 | struct text_pos start; |
6523 | int window_height_changed_p = 0; | |
6524 | ||
6525 | /* Do this before displaying, so that we have a large enough glyph | |
6526 | matrix for the display. */ | |
92a90e89 | 6527 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
6528 | |
6529 | /* Display. */ | |
6530 | clear_glyph_matrix (w->desired_matrix); | |
6531 | XSETWINDOW (window, w); | |
6532 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
6533 | try_window (window, start); | |
6534 | ||
c6e89d6c GM |
6535 | return window_height_changed_p; |
6536 | } | |
6537 | ||
6538 | ||
92a90e89 | 6539 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
6540 | currently displayed message, if there is one. If a mini-buffer |
6541 | is active, don't shrink it. */ | |
92a90e89 GM |
6542 | |
6543 | void | |
308a74d8 | 6544 | resize_echo_area_exactly () |
92a90e89 GM |
6545 | { |
6546 | if (BUFFERP (echo_area_buffer[0]) | |
6547 | && WINDOWP (echo_area_window)) | |
6548 | { | |
6549 | struct window *w = XWINDOW (echo_area_window); | |
6550 | int resized_p; | |
6d004fea GM |
6551 | Lisp_Object resize_exactly; |
6552 | ||
6553 | if (minibuf_level == 0) | |
6554 | resize_exactly = Qt; | |
6555 | else | |
6556 | resize_exactly = Qnil; | |
92a90e89 | 6557 | |
23a96c77 | 6558 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 6559 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
6560 | if (resized_p) |
6561 | { | |
6562 | ++windows_or_buffers_changed; | |
6563 | ++update_mode_lines; | |
6564 | redisplay_internal (0); | |
6565 | } | |
6566 | } | |
6567 | } | |
6568 | ||
6569 | ||
23a96c77 | 6570 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 6571 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
6572 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
6573 | size of the text displayed. A3 and A4 are not used. Value is what | |
6574 | resize_mini_window returns. */ | |
23a96c77 GM |
6575 | |
6576 | static int | |
6d004fea | 6577 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 6578 | EMACS_INT a1; |
6d004fea | 6579 | Lisp_Object exactly; |
23dd2d97 | 6580 | EMACS_INT a3, a4; |
23a96c77 | 6581 | { |
6d004fea | 6582 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
6583 | } |
6584 | ||
6585 | ||
92a90e89 GM |
6586 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
6587 | means size the window exactly to the size needed. Otherwise, it's | |
6588 | only enlarged until W's buffer is empty. Value is non-zero if | |
4b41cebb | 6589 | the window height has been changed. */ |
c6e89d6c | 6590 | |
9472f927 | 6591 | int |
92a90e89 | 6592 | resize_mini_window (w, exact_p) |
c6e89d6c | 6593 | struct window *w; |
92a90e89 | 6594 | int exact_p; |
c6e89d6c GM |
6595 | { |
6596 | struct frame *f = XFRAME (w->frame); | |
6597 | int window_height_changed_p = 0; | |
6598 | ||
6599 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 6600 | |
2913a9c0 GM |
6601 | /* Don't resize windows while redisplaying a window; it would |
6602 | confuse redisplay functions when the size of the window they are | |
6603 | displaying changes from under them. Such a resizing can happen, | |
6604 | for instance, when which-func prints a long message while | |
6605 | we are running fontification-functions. We're running these | |
6606 | functions with safe_call which binds inhibit-redisplay to t. */ | |
6607 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 GM |
6608 | return 0; |
6609 | ||
97cafc0f | 6610 | /* Nil means don't try to resize. */ |
6422c1d7 | 6611 | if (NILP (Vresize_mini_windows) |
00f6d59e | 6612 | || (FRAME_X_P (f) && f->output_data.x == NULL)) |
97cafc0f | 6613 | return 0; |
c6e89d6c GM |
6614 | |
6615 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
6616 | { | |
6617 | struct it it; | |
dd2eb166 GM |
6618 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
6619 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
6620 | int height, max_height; | |
6621 | int unit = CANON_Y_UNIT (f); | |
6622 | struct text_pos start; | |
1bfdbe43 GM |
6623 | struct buffer *old_current_buffer = NULL; |
6624 | ||
6625 | if (current_buffer != XBUFFER (w->buffer)) | |
6626 | { | |
6627 | old_current_buffer = current_buffer; | |
6628 | set_buffer_internal (XBUFFER (w->buffer)); | |
6629 | } | |
9142dd5b | 6630 | |
c6e89d6c | 6631 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 6632 | |
dd2eb166 GM |
6633 | /* Compute the max. number of lines specified by the user. */ |
6634 | if (FLOATP (Vmax_mini_window_height)) | |
18f9986a | 6635 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_HEIGHT (f); |
dd2eb166 GM |
6636 | else if (INTEGERP (Vmax_mini_window_height)) |
6637 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
6638 | else |
6639 | max_height = total_height / 4; | |
dd2eb166 | 6640 | |
4b41cebb | 6641 | /* Correct that max. height if it's bogus. */ |
dd2eb166 GM |
6642 | max_height = max (1, max_height); |
6643 | max_height = min (total_height, max_height); | |
6644 | ||
6645 | /* Find out the height of the text in the window. */ | |
ad4f174e GM |
6646 | if (it.truncate_lines_p) |
6647 | height = 1; | |
55b064bd | 6648 | else |
ad4f174e GM |
6649 | { |
6650 | last_height = 0; | |
6651 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
6652 | if (it.max_ascent == 0 && it.max_descent == 0) | |
6653 | height = it.current_y + last_height; | |
6654 | else | |
6655 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 6656 | height -= it.extra_line_spacing; |
ad4f174e GM |
6657 | height = (height + unit - 1) / unit; |
6658 | } | |
dd2eb166 GM |
6659 | |
6660 | /* Compute a suitable window start. */ | |
6661 | if (height > max_height) | |
6662 | { | |
6663 | height = max_height; | |
6664 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
6665 | move_it_vertically_backward (&it, (height - 1) * unit); | |
6666 | start = it.current.pos; | |
6667 | } | |
6668 | else | |
6669 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
6670 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 6671 | |
6422c1d7 | 6672 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 6673 | { |
6422c1d7 GM |
6674 | /* Let it grow only, until we display an empty message, in which |
6675 | case the window shrinks again. */ | |
6676 | if (height > XFASTINT (w->height)) | |
6677 | { | |
6678 | int old_height = XFASTINT (w->height); | |
6679 | freeze_window_starts (f, 1); | |
6680 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6681 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6682 | } | |
6683 | else if (height < XFASTINT (w->height) | |
6684 | && (exact_p || BEGV == ZV)) | |
6685 | { | |
6686 | int old_height = XFASTINT (w->height); | |
6687 | freeze_window_starts (f, 0); | |
6688 | shrink_mini_window (w); | |
6689 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6690 | } | |
da448723 | 6691 | } |
6422c1d7 | 6692 | else |
da448723 | 6693 | { |
6422c1d7 GM |
6694 | /* Always resize to exact size needed. */ |
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 | { | |
6704 | int old_height = XFASTINT (w->height); | |
6705 | freeze_window_starts (f, 0); | |
6706 | shrink_mini_window (w); | |
6707 | ||
6708 | if (height) | |
6709 | { | |
6710 | freeze_window_starts (f, 1); | |
6711 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6712 | } | |
6713 | ||
6714 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6715 | } | |
9142dd5b | 6716 | } |
1bfdbe43 GM |
6717 | |
6718 | if (old_current_buffer) | |
6719 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
6720 | } |
6721 | ||
6722 | return window_height_changed_p; | |
6723 | } | |
6724 | ||
6725 | ||
6726 | /* Value is the current message, a string, or nil if there is no | |
6727 | current message. */ | |
6728 | ||
6729 | Lisp_Object | |
6730 | current_message () | |
6731 | { | |
6732 | Lisp_Object msg; | |
6733 | ||
6734 | if (NILP (echo_area_buffer[0])) | |
6735 | msg = Qnil; | |
6736 | else | |
6737 | { | |
23a96c77 | 6738 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 6739 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
6740 | if (NILP (msg)) |
6741 | echo_area_buffer[0] = Qnil; | |
6742 | } | |
6743 | ||
6744 | return msg; | |
6745 | } | |
6746 | ||
6747 | ||
6748 | static int | |
23a96c77 | 6749 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6750 | EMACS_INT a1; |
6751 | Lisp_Object a2; | |
6752 | EMACS_INT a3, a4; | |
c6e89d6c | 6753 | { |
23a96c77 GM |
6754 | Lisp_Object *msg = (Lisp_Object *) a1; |
6755 | ||
c6e89d6c GM |
6756 | if (Z > BEG) |
6757 | *msg = make_buffer_string (BEG, Z, 1); | |
6758 | else | |
6759 | *msg = Qnil; | |
6760 | return 0; | |
6761 | } | |
6762 | ||
6763 | ||
6764 | /* Push the current message on Vmessage_stack for later restauration | |
6765 | by restore_message. Value is non-zero if the current message isn't | |
6766 | empty. This is a relatively infrequent operation, so it's not | |
6767 | worth optimizing. */ | |
6768 | ||
6769 | int | |
6770 | push_message () | |
6771 | { | |
6772 | Lisp_Object msg; | |
6773 | msg = current_message (); | |
6774 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
6775 | return STRINGP (msg); | |
6776 | } | |
6777 | ||
6778 | ||
098ec84a GM |
6779 | /* Handler for record_unwind_protect calling pop_message. */ |
6780 | ||
6781 | Lisp_Object | |
6782 | push_message_unwind (dummy) | |
6783 | Lisp_Object dummy; | |
6784 | { | |
6785 | pop_message (); | |
6786 | return Qnil; | |
6787 | } | |
6788 | ||
6789 | ||
c6e89d6c GM |
6790 | /* Restore message display from the top of Vmessage_stack. */ |
6791 | ||
6792 | void | |
6793 | restore_message () | |
6794 | { | |
6795 | Lisp_Object msg; | |
6796 | ||
6797 | xassert (CONSP (Vmessage_stack)); | |
6798 | msg = XCAR (Vmessage_stack); | |
6799 | if (STRINGP (msg)) | |
6800 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
6801 | else | |
6802 | message3_nolog (msg, 0, 0); | |
6803 | } | |
6804 | ||
6805 | ||
6806 | /* Pop the top-most entry off Vmessage_stack. */ | |
6807 | ||
6808 | void | |
6809 | pop_message () | |
6810 | { | |
6811 | xassert (CONSP (Vmessage_stack)); | |
6812 | Vmessage_stack = XCDR (Vmessage_stack); | |
6813 | } | |
6814 | ||
6815 | ||
6816 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
6817 | exits. If the stack is not empty, we have a missing pop_message | |
6818 | somewhere. */ | |
6819 | ||
6820 | void | |
6821 | check_message_stack () | |
6822 | { | |
6823 | if (!NILP (Vmessage_stack)) | |
6824 | abort (); | |
6825 | } | |
6826 | ||
6827 | ||
6828 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
6829 | time we display it---but don't redisplay it now. */ | |
6830 | ||
6831 | void | |
6832 | truncate_echo_area (nchars) | |
6833 | int nchars; | |
6834 | { | |
6835 | if (nchars == 0) | |
6836 | echo_area_buffer[0] = Qnil; | |
6837 | /* A null message buffer means that the frame hasn't really been | |
6838 | initialized yet. Error messages get reported properly by | |
6839 | cmd_error, so this must be just an informative message; toss it. */ | |
6840 | else if (!noninteractive | |
6841 | && INTERACTIVE | |
c6e89d6c | 6842 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
6843 | { |
6844 | struct frame *sf = SELECTED_FRAME (); | |
6845 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 6846 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 6847 | } |
c6e89d6c GM |
6848 | } |
6849 | ||
6850 | ||
6851 | /* Helper function for truncate_echo_area. Truncate the current | |
6852 | message to at most NCHARS characters. */ | |
6853 | ||
6854 | static int | |
23a96c77 | 6855 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
6856 | EMACS_INT nchars; |
6857 | Lisp_Object a2; | |
6858 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6859 | { |
6860 | if (BEG + nchars < Z) | |
6861 | del_range (BEG + nchars, Z); | |
6862 | if (Z == BEG) | |
6863 | echo_area_buffer[0] = Qnil; | |
6864 | return 0; | |
6865 | } | |
6866 | ||
6867 | ||
6868 | /* Set the current message to a substring of S or STRING. | |
6869 | ||
6870 | If STRING is a Lisp string, set the message to the first NBYTES | |
6871 | bytes from STRING. NBYTES zero means use the whole string. If | |
6872 | STRING is multibyte, the message will be displayed multibyte. | |
6873 | ||
6874 | If S is not null, set the message to the first LEN bytes of S. LEN | |
6875 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
6876 | multibyte. Display the message multibyte in that case. */ | |
6877 | ||
6878 | void | |
6879 | set_message (s, string, nbytes, multibyte_p) | |
6880 | char *s; | |
6881 | Lisp_Object string; | |
6882 | int nbytes; | |
6883 | { | |
6884 | message_enable_multibyte | |
6885 | = ((s && multibyte_p) | |
6886 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
6887 | ||
23a96c77 GM |
6888 | with_echo_area_buffer (0, -1, set_message_1, |
6889 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c | 6890 | message_buf_print = 0; |
21fdfb65 | 6891 | help_echo_showing_p = 0; |
c6e89d6c GM |
6892 | } |
6893 | ||
6894 | ||
6895 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
6896 | as there, with A1 corresponding to S and A2 corresponding to STRING |
6897 | This function is called with the echo area buffer being | |
c6e89d6c GM |
6898 | current. */ |
6899 | ||
6900 | static int | |
23a96c77 | 6901 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
6902 | EMACS_INT a1; |
6903 | Lisp_Object a2; | |
6904 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 6905 | { |
23a96c77 | 6906 | char *s = (char *) a1; |
23dd2d97 | 6907 | Lisp_Object string = a2; |
23a96c77 | 6908 | |
c6e89d6c GM |
6909 | xassert (BEG == Z); |
6910 | ||
6911 | /* Change multibyteness of the echo buffer appropriately. */ | |
6912 | if (message_enable_multibyte | |
6913 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6914 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
6915 | ||
ad4f174e GM |
6916 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
6917 | ||
c6e89d6c GM |
6918 | /* Insert new message at BEG. */ |
6919 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
6920 | ||
6921 | if (STRINGP (string)) | |
6922 | { | |
6923 | int nchars; | |
6924 | ||
6925 | if (nbytes == 0) | |
6926 | nbytes = XSTRING (string)->size_byte; | |
6927 | nchars = string_byte_to_char (string, nbytes); | |
6928 | ||
6929 | /* This function takes care of single/multibyte conversion. We | |
6930 | just have to ensure that the echo area buffer has the right | |
6931 | setting of enable_multibyte_characters. */ | |
6932 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
6933 | } | |
6934 | else if (s) | |
6935 | { | |
6936 | if (nbytes == 0) | |
6937 | nbytes = strlen (s); | |
6938 | ||
6939 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
6940 | { | |
6941 | /* Convert from multi-byte to single-byte. */ | |
6942 | int i, c, n; | |
6943 | unsigned char work[1]; | |
6944 | ||
6945 | /* Convert a multibyte string to single-byte. */ | |
6946 | for (i = 0; i < nbytes; i += n) | |
6947 | { | |
6948 | c = string_char_and_length (s + i, nbytes - i, &n); | |
6949 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
6950 | ? c | |
6951 | : multibyte_char_to_unibyte (c, Qnil)); | |
6952 | insert_1_both (work, 1, 1, 1, 0, 0); | |
6953 | } | |
6954 | } | |
6955 | else if (!multibyte_p | |
6956 | && !NILP (current_buffer->enable_multibyte_characters)) | |
6957 | { | |
6958 | /* Convert from single-byte to multi-byte. */ | |
6959 | int i, c, n; | |
6960 | unsigned char *msg = (unsigned char *) s; | |
260a86a0 | 6961 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c6e89d6c GM |
6962 | |
6963 | /* Convert a single-byte string to multibyte. */ | |
6964 | for (i = 0; i < nbytes; i++) | |
6965 | { | |
6966 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
6967 | n = CHAR_STRING (c, str); |
6968 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
6969 | } |
6970 | } | |
6971 | else | |
6972 | insert_1 (s, nbytes, 1, 0, 0); | |
6973 | } | |
6974 | ||
6975 | return 0; | |
6976 | } | |
6977 | ||
6978 | ||
6979 | /* Clear messages. CURRENT_P non-zero means clear the current | |
6980 | message. LAST_DISPLAYED_P non-zero means clear the message | |
6981 | last displayed. */ | |
6982 | ||
6983 | void | |
6984 | clear_message (current_p, last_displayed_p) | |
6985 | int current_p, last_displayed_p; | |
6986 | { | |
6987 | if (current_p) | |
6e019995 GM |
6988 | { |
6989 | echo_area_buffer[0] = Qnil; | |
6990 | message_cleared_p = 1; | |
6991 | } | |
c6e89d6c GM |
6992 | |
6993 | if (last_displayed_p) | |
6994 | echo_area_buffer[1] = Qnil; | |
6995 | ||
6996 | message_buf_print = 0; | |
6997 | } | |
6998 | ||
6999 | /* Clear garbaged frames. | |
7000 | ||
7001 | This function is used where the old redisplay called | |
7002 | redraw_garbaged_frames which in turn called redraw_frame which in | |
7003 | turn called clear_frame. The call to clear_frame was a source of | |
7004 | flickering. I believe a clear_frame is not necessary. It should | |
7005 | suffice in the new redisplay to invalidate all current matrices, | |
7006 | and ensure a complete redisplay of all windows. */ | |
7007 | ||
7008 | static void | |
7009 | clear_garbaged_frames () | |
7010 | { | |
5f5c8ee5 GM |
7011 | if (frame_garbaged) |
7012 | { | |
5f5c8ee5 GM |
7013 | Lisp_Object tail, frame; |
7014 | ||
7015 | FOR_EACH_FRAME (tail, frame) | |
7016 | { | |
7017 | struct frame *f = XFRAME (frame); | |
7018 | ||
7019 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
7020 | { | |
6bb95882 | 7021 | if (f->resized_p) |
573e57f1 | 7022 | Fredraw_frame (frame); |
5f5c8ee5 GM |
7023 | clear_current_matrices (f); |
7024 | f->garbaged = 0; | |
6bb95882 | 7025 | f->resized_p = 0; |
5f5c8ee5 GM |
7026 | } |
7027 | } | |
7028 | ||
7029 | frame_garbaged = 0; | |
7030 | ++windows_or_buffers_changed; | |
7031 | } | |
c6e89d6c | 7032 | } |
5f5c8ee5 | 7033 | |
5f5c8ee5 | 7034 | |
886bd6f2 GM |
7035 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
7036 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 7037 | mini-windows height has been changed. */ |
5f5c8ee5 | 7038 | |
c6e89d6c GM |
7039 | static int |
7040 | echo_area_display (update_frame_p) | |
7041 | int update_frame_p; | |
7042 | { | |
7043 | Lisp_Object mini_window; | |
7044 | struct window *w; | |
7045 | struct frame *f; | |
7046 | int window_height_changed_p = 0; | |
886bd6f2 | 7047 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7048 | |
886bd6f2 | 7049 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7050 | w = XWINDOW (mini_window); |
7051 | f = XFRAME (WINDOW_FRAME (w)); | |
7052 | ||
7053 | /* Don't display if frame is invisible or not yet initialized. */ | |
7054 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
7055 | return 0; | |
5f5c8ee5 | 7056 | |
1a578e9b AC |
7057 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
7058 | #ifndef macintosh | |
1ab3e082 | 7059 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
7060 | /* When Emacs starts, selected_frame may be a visible terminal |
7061 | frame, even if we run under a window system. If we let this | |
7062 | through, a message would be displayed on the terminal. */ | |
622e3754 GM |
7063 | if (EQ (selected_frame, Vterminal_frame) |
7064 | && !NILP (Vwindow_system)) | |
c6e89d6c | 7065 | return 0; |
1ab3e082 | 7066 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 7067 | #endif |
c6e89d6c GM |
7068 | |
7069 | /* Redraw garbaged frames. */ | |
7070 | if (frame_garbaged) | |
7071 | clear_garbaged_frames (); | |
7072 | ||
7073 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
7074 | { | |
7075 | echo_area_window = mini_window; | |
7076 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 7077 | w->must_be_updated_p = 1; |
c59c668a | 7078 | |
d4358b37 GM |
7079 | /* Update the display, unless called from redisplay_internal. |
7080 | Also don't update the screen during redisplay itself. The | |
7081 | update will happen at the end of redisplay, and an update | |
7082 | here could cause confusion. */ | |
7083 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 7084 | { |
715e84c9 | 7085 | int n = 0; |
edc68111 | 7086 | |
715e84c9 GM |
7087 | /* If the display update has been interrupted by pending |
7088 | input, update mode lines in the frame. Due to the | |
7089 | pending input, it might have been that redisplay hasn't | |
7090 | been called, so that mode lines above the echo area are | |
7091 | garbaged. This looks odd, so we prevent it here. */ | |
7092 | if (!display_completed) | |
7093 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
7094 | ||
8af1308e GM |
7095 | if (window_height_changed_p |
7096 | /* Don't do this if Emacs is shutting down. Redisplay | |
7097 | needs to run hooks. */ | |
7098 | && !NILP (Vrun_hooks)) | |
c59c668a | 7099 | { |
c06017fb GM |
7100 | /* Must update other windows. Likewise as in other |
7101 | cases, don't let this update be interrupted by | |
7102 | pending input. */ | |
7103 | int count = BINDING_STACK_SIZE (); | |
7104 | specbind (Qredisplay_dont_pause, Qt); | |
edc68111 | 7105 | windows_or_buffers_changed = 1; |
c59c668a | 7106 | redisplay_internal (0); |
c06017fb | 7107 | unbind_to (count, Qnil); |
c59c668a | 7108 | } |
715e84c9 | 7109 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 7110 | { |
edc68111 | 7111 | /* Window configuration is the same as before. |
715e84c9 GM |
7112 | Can do with a display update of the echo area, |
7113 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
7114 | update_single_window (w, 1); |
7115 | rif->flush_display (f); | |
7116 | } | |
7117 | else | |
7118 | update_frame (f, 1, 1); | |
31b6671b GM |
7119 | |
7120 | /* If cursor is in the echo area, make sure that the next | |
7121 | redisplay displays the minibuffer, so that the cursor will | |
7122 | be replaced with what the minibuffer wants. */ | |
7123 | if (cursor_in_echo_area) | |
7124 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
7125 | } |
7126 | } | |
7127 | else if (!EQ (mini_window, selected_window)) | |
7128 | windows_or_buffers_changed++; | |
c59c668a GM |
7129 | |
7130 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
7131 | echo_area_buffer[1] = echo_area_buffer[0]; |
7132 | ||
5f5c8ee5 GM |
7133 | /* Prevent redisplay optimization in redisplay_internal by resetting |
7134 | this_line_start_pos. This is done because the mini-buffer now | |
7135 | displays the message instead of its buffer text. */ | |
7136 | if (EQ (mini_window, selected_window)) | |
7137 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
7138 | |
7139 | return window_height_changed_p; | |
5f5c8ee5 GM |
7140 | } |
7141 | ||
7142 | ||
7143 | \f | |
7144 | /*********************************************************************** | |
7145 | Frame Titles | |
7146 | ***********************************************************************/ | |
7147 | ||
7148 | ||
7149 | #ifdef HAVE_WINDOW_SYSTEM | |
7150 | ||
7151 | /* A buffer for constructing frame titles in it; allocated from the | |
7152 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
7153 | ||
7154 | static char *frame_title_buf; | |
7155 | ||
7156 | /* The buffer's end, and a current output position in it. */ | |
7157 | ||
7158 | static char *frame_title_buf_end; | |
7159 | static char *frame_title_ptr; | |
7160 | ||
7161 | ||
7162 | /* Store a single character C for the frame title in frame_title_buf. | |
7163 | Re-allocate frame_title_buf if necessary. */ | |
7164 | ||
7165 | static void | |
7166 | store_frame_title_char (c) | |
7167 | char c; | |
7168 | { | |
7169 | /* If output position has reached the end of the allocated buffer, | |
7170 | double the buffer's size. */ | |
7171 | if (frame_title_ptr == frame_title_buf_end) | |
7172 | { | |
7173 | int len = frame_title_ptr - frame_title_buf; | |
7174 | int new_size = 2 * len * sizeof *frame_title_buf; | |
7175 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
7176 | frame_title_buf_end = frame_title_buf + new_size; | |
7177 | frame_title_ptr = frame_title_buf + len; | |
7178 | } | |
7179 | ||
7180 | *frame_title_ptr++ = c; | |
7181 | } | |
7182 | ||
7183 | ||
7184 | /* Store part of a frame title in frame_title_buf, beginning at | |
d26b89b8 KH |
7185 | frame_title_ptr. STR is the string to store. Do not copy |
7186 | characters that yield more columns than PRECISION; PRECISION <= 0 | |
7187 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
7188 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
7189 | pad. Called from display_mode_element when it is used to build a | |
7190 | frame title. */ | |
5f5c8ee5 GM |
7191 | |
7192 | static int | |
7193 | store_frame_title (str, field_width, precision) | |
7194 | unsigned char *str; | |
7195 | int field_width, precision; | |
7196 | { | |
7197 | int n = 0; | |
3b552d56 | 7198 | int dummy, nbytes; |
5f5c8ee5 GM |
7199 | |
7200 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 KH |
7201 | nbytes = strlen (str); |
7202 | n+= c_string_width (str, nbytes, precision, &dummy, &nbytes); | |
7203 | while (nbytes--) | |
7204 | store_frame_title_char (*str++); | |
5f5c8ee5 GM |
7205 | |
7206 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
7207 | while (field_width > 0 | |
7208 | && n < field_width) | |
7209 | { | |
7210 | store_frame_title_char (' '); | |
7211 | ++n; | |
7212 | } | |
7213 | ||
7214 | return n; | |
7215 | } | |
7216 | ||
7217 | ||
7218 | /* Set the title of FRAME, if it has changed. The title format is | |
7219 | Vicon_title_format if FRAME is iconified, otherwise it is | |
7220 | frame_title_format. */ | |
7221 | ||
7222 | static void | |
7223 | x_consider_frame_title (frame) | |
7224 | Lisp_Object frame; | |
7225 | { | |
7226 | struct frame *f = XFRAME (frame); | |
7227 | ||
7228 | if (FRAME_WINDOW_P (f) | |
7229 | || FRAME_MINIBUF_ONLY_P (f) | |
7230 | || f->explicit_name) | |
7231 | { | |
7232 | /* Do we have more than one visible frame on this X display? */ | |
7233 | Lisp_Object tail; | |
7234 | Lisp_Object fmt; | |
7235 | struct buffer *obuf; | |
7236 | int len; | |
7237 | struct it it; | |
7238 | ||
9472f927 | 7239 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 7240 | { |
74779f52 JR |
7241 | Lisp_Object other_frame = XCAR (tail); |
7242 | struct frame *tf = XFRAME (other_frame); | |
5f5c8ee5 GM |
7243 | |
7244 | if (tf != f | |
7245 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
7246 | && !FRAME_MINIBUF_ONLY_P (tf) | |
74779f52 | 7247 | && !EQ (other_frame, tip_frame) |
5f5c8ee5 GM |
7248 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) |
7249 | break; | |
7250 | } | |
7251 | ||
7252 | /* Set global variable indicating that multiple frames exist. */ | |
7253 | multiple_frames = CONSP (tail); | |
7254 | ||
7255 | /* Switch to the buffer of selected window of the frame. Set up | |
7256 | frame_title_ptr so that display_mode_element will output into it; | |
7257 | then display the title. */ | |
7258 | obuf = current_buffer; | |
bb336f8d | 7259 | set_buffer_internal_1 (XBUFFER (XWINDOW (f->selected_window)->buffer)); |
5f5c8ee5 GM |
7260 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; |
7261 | frame_title_ptr = frame_title_buf; | |
7262 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
7263 | NULL, DEFAULT_FACE_ID); | |
0fcf414f | 7264 | display_mode_element (&it, 0, -1, -1, fmt, Qnil); |
d26b89b8 | 7265 | len = frame_title_ptr - frame_title_buf; |
5f5c8ee5 | 7266 | frame_title_ptr = NULL; |
bb336f8d | 7267 | set_buffer_internal_1 (obuf); |
5f5c8ee5 GM |
7268 | |
7269 | /* Set the title only if it's changed. This avoids consing in | |
7270 | the common case where it hasn't. (If it turns out that we've | |
7271 | already wasted too much time by walking through the list with | |
7272 | display_mode_element, then we might need to optimize at a | |
7273 | higher level than this.) */ | |
7274 | if (! STRINGP (f->name) | |
7275 | || STRING_BYTES (XSTRING (f->name)) != len | |
7276 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
7277 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
7278 | } | |
7279 | } | |
7280 | ||
7281 | #else /* not HAVE_WINDOW_SYSTEM */ | |
7282 | ||
7283 | #define frame_title_ptr ((char *)0) | |
7284 | #define store_frame_title(str, mincol, maxcol) 0 | |
7285 | ||
7286 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
7287 | ||
7288 | ||
7289 | ||
7290 | \f | |
7291 | /*********************************************************************** | |
7292 | Menu Bars | |
7293 | ***********************************************************************/ | |
7294 | ||
7295 | ||
7296 | /* Prepare for redisplay by updating menu-bar item lists when | |
7297 | appropriate. This can call eval. */ | |
7298 | ||
7299 | void | |
7300 | prepare_menu_bars () | |
7301 | { | |
7302 | int all_windows; | |
7303 | struct gcpro gcpro1, gcpro2; | |
7304 | struct frame *f; | |
6b5c4794 | 7305 | Lisp_Object tooltip_frame; |
5f5c8ee5 | 7306 | |
86ffe5cd | 7307 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
7308 | tooltip_frame = tip_frame; |
7309 | #else | |
6b5c4794 | 7310 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
7311 | #endif |
7312 | ||
7313 | /* Update all frame titles based on their buffer names, etc. We do | |
7314 | this before the menu bars so that the buffer-menu will show the | |
7315 | up-to-date frame titles. */ | |
7316 | #ifdef HAVE_WINDOW_SYSTEM | |
7317 | if (windows_or_buffers_changed || update_mode_lines) | |
7318 | { | |
7319 | Lisp_Object tail, frame; | |
7320 | ||
7321 | FOR_EACH_FRAME (tail, frame) | |
7322 | { | |
7323 | f = XFRAME (frame); | |
6b5c4794 | 7324 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
7325 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
7326 | x_consider_frame_title (frame); | |
7327 | } | |
7328 | } | |
7329 | #endif /* HAVE_WINDOW_SYSTEM */ | |
7330 | ||
7331 | /* Update the menu bar item lists, if appropriate. This has to be | |
7332 | done before any actual redisplay or generation of display lines. */ | |
7333 | all_windows = (update_mode_lines | |
7334 | || buffer_shared > 1 | |
7335 | || windows_or_buffers_changed); | |
7336 | if (all_windows) | |
7337 | { | |
7338 | Lisp_Object tail, frame; | |
2d27dae2 | 7339 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 GM |
7340 | |
7341 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7342 | ||
7343 | FOR_EACH_FRAME (tail, frame) | |
7344 | { | |
7345 | f = XFRAME (frame); | |
7346 | ||
7347 | /* Ignore tooltip frame. */ | |
6b5c4794 | 7348 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 GM |
7349 | continue; |
7350 | ||
7351 | /* If a window on this frame changed size, report that to | |
7352 | the user and clear the size-change flag. */ | |
7353 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
7354 | { | |
7355 | Lisp_Object functions; | |
7356 | ||
7357 | /* Clear flag first in case we get an error below. */ | |
7358 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
7359 | functions = Vwindow_size_change_functions; | |
7360 | GCPRO2 (tail, functions); | |
7361 | ||
7362 | while (CONSP (functions)) | |
7363 | { | |
7364 | call1 (XCAR (functions), frame); | |
7365 | functions = XCDR (functions); | |
7366 | } | |
7367 | UNGCPRO; | |
7368 | } | |
7369 | ||
7370 | GCPRO1 (tail); | |
7371 | update_menu_bar (f, 0); | |
7372 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 7373 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
7374 | #endif |
7375 | UNGCPRO; | |
7376 | } | |
7377 | ||
7378 | unbind_to (count, Qnil); | |
7379 | } | |
7380 | else | |
7381 | { | |
886bd6f2 GM |
7382 | struct frame *sf = SELECTED_FRAME (); |
7383 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 7384 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 7385 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
7386 | #endif |
7387 | } | |
7388 | ||
7389 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
7390 | pending_menu_activation is not defined. */ | |
7391 | #ifdef USE_X_TOOLKIT | |
7392 | pending_menu_activation = 0; | |
7393 | #endif | |
7394 | } | |
7395 | ||
7396 | ||
7397 | /* Update the menu bar item list for frame F. This has to be done | |
7398 | before we start to fill in any display lines, because it can call | |
7399 | eval. | |
7400 | ||
7401 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
7402 | ||
7403 | static void | |
7404 | update_menu_bar (f, save_match_data) | |
7405 | struct frame *f; | |
7406 | int save_match_data; | |
7407 | { | |
7408 | Lisp_Object window; | |
7409 | register struct window *w; | |
7410 | ||
e1477f43 GM |
7411 | /* If called recursively during a menu update, do nothing. This can |
7412 | happen when, for instance, an activate-menubar-hook causes a | |
7413 | redisplay. */ | |
7414 | if (inhibit_menubar_update) | |
7415 | return; | |
7416 | ||
5f5c8ee5 GM |
7417 | window = FRAME_SELECTED_WINDOW (f); |
7418 | w = XWINDOW (window); | |
7419 | ||
7420 | if (update_mode_lines) | |
7421 | w->update_mode_line = Qt; | |
7422 | ||
7423 | if (FRAME_WINDOW_P (f) | |
7424 | ? | |
1a578e9b | 7425 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
5f5c8ee5 GM |
7426 | FRAME_EXTERNAL_MENU_BAR (f) |
7427 | #else | |
7428 | FRAME_MENU_BAR_LINES (f) > 0 | |
7429 | #endif | |
7430 | : FRAME_MENU_BAR_LINES (f) > 0) | |
7431 | { | |
7432 | /* If the user has switched buffers or windows, we need to | |
7433 | recompute to reflect the new bindings. But we'll | |
7434 | recompute when update_mode_lines is set too; that means | |
7435 | that people can use force-mode-line-update to request | |
7436 | that the menu bar be recomputed. The adverse effect on | |
7437 | the rest of the redisplay algorithm is about the same as | |
7438 | windows_or_buffers_changed anyway. */ | |
7439 | if (windows_or_buffers_changed | |
7440 | || !NILP (w->update_mode_line) | |
7441 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7442 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7443 | != !NILP (w->last_had_star)) | |
7444 | || ((!NILP (Vtransient_mark_mode) | |
7445 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7446 | != !NILP (w->region_showing))) | |
7447 | { | |
7448 | struct buffer *prev = current_buffer; | |
2d27dae2 | 7449 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 | 7450 | |
e1477f43 GM |
7451 | specbind (Qinhibit_menubar_update, Qt); |
7452 | ||
5f5c8ee5 GM |
7453 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7454 | if (save_match_data) | |
7455 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7456 | if (NILP (Voverriding_local_map_menu_flag)) | |
7457 | { | |
7458 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7459 | specbind (Qoverriding_local_map, Qnil); | |
7460 | } | |
7461 | ||
7462 | /* Run the Lucid hook. */ | |
65048e97 | 7463 | safe_run_hooks (Qactivate_menubar_hook); |
5f5c8ee5 GM |
7464 | |
7465 | /* If it has changed current-menubar from previous value, | |
7466 | really recompute the menu-bar from the value. */ | |
7467 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
7468 | call0 (Qrecompute_lucid_menubar); | |
7469 | ||
7470 | safe_run_hooks (Qmenu_bar_update_hook); | |
7471 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
7472 | ||
7473 | /* Redisplay the menu bar in case we changed it. */ | |
1a578e9b AC |
7474 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
7475 | if (FRAME_WINDOW_P (f) | |
7476 | #if defined (macintosh) | |
7477 | /* All frames on Mac OS share the same menubar. So only the | |
7478 | selected frame should be allowed to set it. */ | |
7479 | && f == SELECTED_FRAME () | |
7480 | #endif | |
7481 | ) | |
5f5c8ee5 GM |
7482 | set_frame_menubar (f, 0, 0); |
7483 | else | |
7484 | /* On a terminal screen, the menu bar is an ordinary screen | |
7485 | line, and this makes it get updated. */ | |
7486 | w->update_mode_line = Qt; | |
7487 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
7488 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
7489 | line, and this makes it get updated. */ | |
7490 | w->update_mode_line = Qt; | |
7491 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
7492 | ||
7493 | unbind_to (count, Qnil); | |
7494 | set_buffer_internal_1 (prev); | |
7495 | } | |
7496 | } | |
7497 | } | |
7498 | ||
7499 | ||
7500 | \f | |
7501 | /*********************************************************************** | |
e037b9ec | 7502 | Tool-bars |
5f5c8ee5 GM |
7503 | ***********************************************************************/ |
7504 | ||
7505 | #ifdef HAVE_WINDOW_SYSTEM | |
7506 | ||
e037b9ec | 7507 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
7508 | before we start to fill in any display lines. Called from |
7509 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
7510 | and restore it here. */ | |
7511 | ||
7512 | static void | |
e037b9ec | 7513 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
7514 | struct frame *f; |
7515 | int save_match_data; | |
7516 | { | |
e037b9ec GM |
7517 | if (WINDOWP (f->tool_bar_window) |
7518 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
7519 | { |
7520 | Lisp_Object window; | |
7521 | struct window *w; | |
7522 | ||
7523 | window = FRAME_SELECTED_WINDOW (f); | |
7524 | w = XWINDOW (window); | |
7525 | ||
7526 | /* If the user has switched buffers or windows, we need to | |
7527 | recompute to reflect the new bindings. But we'll | |
7528 | recompute when update_mode_lines is set too; that means | |
7529 | that people can use force-mode-line-update to request | |
7530 | that the menu bar be recomputed. The adverse effect on | |
7531 | the rest of the redisplay algorithm is about the same as | |
7532 | windows_or_buffers_changed anyway. */ | |
7533 | if (windows_or_buffers_changed | |
7534 | || !NILP (w->update_mode_line) | |
7535 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7536 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7537 | != !NILP (w->last_had_star)) | |
7538 | || ((!NILP (Vtransient_mark_mode) | |
7539 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7540 | != !NILP (w->region_showing))) | |
7541 | { | |
7542 | struct buffer *prev = current_buffer; | |
2d27dae2 | 7543 | int count = BINDING_STACK_SIZE (); |
a2889657 | 7544 | |
5f5c8ee5 GM |
7545 | /* Set current_buffer to the buffer of the selected |
7546 | window of the frame, so that we get the right local | |
7547 | keymaps. */ | |
7548 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 7549 | |
5f5c8ee5 GM |
7550 | /* Save match data, if we must. */ |
7551 | if (save_match_data) | |
7552 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7553 | ||
7554 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
7555 | if (NILP (Voverriding_local_map_menu_flag)) | |
7556 | { | |
7557 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7558 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 7559 | } |
1f40cad2 | 7560 | |
e037b9ec | 7561 | /* Build desired tool-bar items from keymaps. */ |
7464726e GM |
7562 | f->tool_bar_items |
7563 | = tool_bar_items (f->tool_bar_items, &f->n_tool_bar_items); | |
5f5c8ee5 | 7564 | |
e037b9ec | 7565 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
7566 | w->update_mode_line = Qt; |
7567 | ||
7568 | unbind_to (count, Qnil); | |
7569 | set_buffer_internal_1 (prev); | |
81d478f3 | 7570 | } |
a2889657 JB |
7571 | } |
7572 | } | |
7573 | ||
6c4429a5 | 7574 | |
e037b9ec | 7575 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 7576 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
7577 | been set up previously by calling prepare_menu_bars. */ |
7578 | ||
a2889657 | 7579 | static void |
e037b9ec | 7580 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 7581 | struct frame *f; |
a2889657 | 7582 | { |
a23887b9 | 7583 | int i, size, size_needed; |
5f5c8ee5 GM |
7584 | struct gcpro gcpro1, gcpro2, gcpro3; |
7585 | Lisp_Object image, plist, props; | |
a2889657 | 7586 | |
5f5c8ee5 GM |
7587 | image = plist = props = Qnil; |
7588 | GCPRO3 (image, plist, props); | |
a2889657 | 7589 | |
e037b9ec | 7590 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
7591 | Otherwise, make a new string. */ |
7592 | ||
7593 | /* The size of the string we might be able to reuse. */ | |
e037b9ec GM |
7594 | size = (STRINGP (f->desired_tool_bar_string) |
7595 | ? XSTRING (f->desired_tool_bar_string)->size | |
5f5c8ee5 GM |
7596 | : 0); |
7597 | ||
b94c0d9c | 7598 | /* We need one space in the string for each image. */ |
a23887b9 | 7599 | size_needed = f->n_tool_bar_items; |
b94c0d9c GM |
7600 | |
7601 | /* Reuse f->desired_tool_bar_string, if possible. */ | |
cb2ddc53 | 7602 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
7603 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
7604 | make_number (' ')); | |
5f5c8ee5 GM |
7605 | else |
7606 | { | |
7607 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
7608 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 7609 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7610 | } |
a2889657 | 7611 | |
5f5c8ee5 | 7612 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
7613 | put a `menu_item' property on tool-bar items with a value that |
7614 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 7615 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 7616 | { |
7464726e | 7617 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 7618 | |
e037b9ec GM |
7619 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
7620 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 7621 | int hmargin, vmargin, relief, idx, end; |
ecd01a0e | 7622 | extern Lisp_Object QCrelief, QCmargin, QCconversion, Qimage; |
5f5c8ee5 GM |
7623 | |
7624 | /* If image is a vector, choose the image according to the | |
7625 | button state. */ | |
e037b9ec | 7626 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
7627 | if (VECTORP (image)) |
7628 | { | |
5f5c8ee5 GM |
7629 | if (enabled_p) |
7630 | idx = (selected_p | |
e037b9ec GM |
7631 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
7632 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
7633 | else |
7634 | idx = (selected_p | |
e037b9ec GM |
7635 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
7636 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 | 7637 | |
37e4e482 GM |
7638 | xassert (ASIZE (image) >= idx); |
7639 | image = AREF (image, idx); | |
5f5c8ee5 | 7640 | } |
37e4e482 GM |
7641 | else |
7642 | idx = -1; | |
5f5c8ee5 GM |
7643 | |
7644 | /* Ignore invalid image specifications. */ | |
7645 | if (!valid_image_p (image)) | |
7646 | continue; | |
7647 | ||
e037b9ec | 7648 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
7649 | plist = Fcopy_sequence (XCDR (image)); |
7650 | ||
7651 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 7652 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
7653 | ? tool_bar_button_relief |
7654 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
7655 | hmargin = vmargin = relief; |
7656 | ||
7657 | if (INTEGERP (Vtool_bar_button_margin) | |
7658 | && XINT (Vtool_bar_button_margin) > 0) | |
7659 | { | |
7660 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
7661 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
7662 | } | |
7663 | else if (CONSP (Vtool_bar_button_margin)) | |
7664 | { | |
7665 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
7666 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
7667 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
7668 | ||
7669 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) | |
7670 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
7671 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
7672 | } | |
5f5c8ee5 | 7673 | |
e037b9ec | 7674 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
7675 | { |
7676 | /* Add a `:relief' property to the image spec if the item is | |
7677 | selected. */ | |
7678 | if (selected_p) | |
7679 | { | |
7680 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
7681 | hmargin -= relief; |
7682 | vmargin -= relief; | |
5f5c8ee5 GM |
7683 | } |
7684 | } | |
7685 | else | |
7686 | { | |
7687 | /* If image is selected, display it pressed, i.e. with a | |
7688 | negative relief. If it's not selected, display it with a | |
7689 | raised relief. */ | |
7690 | plist = Fplist_put (plist, QCrelief, | |
7691 | (selected_p | |
7692 | ? make_number (-relief) | |
7693 | : make_number (relief))); | |
35a41507 GM |
7694 | hmargin -= relief; |
7695 | vmargin -= relief; | |
5f5c8ee5 GM |
7696 | } |
7697 | ||
7698 | /* Put a margin around the image. */ | |
35a41507 GM |
7699 | if (hmargin || vmargin) |
7700 | { | |
7701 | if (hmargin == vmargin) | |
7702 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
7703 | else | |
7704 | plist = Fplist_put (plist, QCmargin, | |
7705 | Fcons (make_number (hmargin), | |
7706 | make_number (vmargin))); | |
7707 | } | |
5f5c8ee5 | 7708 | |
37e4e482 GM |
7709 | /* If button is not enabled, and we don't have special images |
7710 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 7711 | applying an appropriate algorithm to it. */ |
37e4e482 | 7712 | if (!enabled_p && idx < 0) |
ecd01a0e | 7713 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
5f5c8ee5 GM |
7714 | |
7715 | /* Put a `display' text property on the string for the image to | |
7716 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 7717 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
7718 | vector. */ |
7719 | image = Fcons (Qimage, plist); | |
7720 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
7721 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
7722 | ||
7723 | /* Let the last image hide all remaining spaces in the tool bar | |
7724 | string. The string can be longer than needed when we reuse a | |
7725 | previous string. */ | |
7726 | if (i + 1 == f->n_tool_bar_items) | |
7727 | end = XSTRING (f->desired_tool_bar_string)->size; | |
7728 | else | |
7729 | end = i + 1; | |
7730 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 7731 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7732 | #undef PROP |
a2889657 JB |
7733 | } |
7734 | ||
5f5c8ee5 GM |
7735 | UNGCPRO; |
7736 | } | |
7737 | ||
7738 | ||
e037b9ec | 7739 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
7740 | |
7741 | static void | |
e037b9ec | 7742 | display_tool_bar_line (it) |
5f5c8ee5 GM |
7743 | struct it *it; |
7744 | { | |
7745 | struct glyph_row *row = it->glyph_row; | |
7746 | int max_x = it->last_visible_x; | |
7747 | struct glyph *last; | |
7748 | ||
7749 | prepare_desired_row (row); | |
7750 | row->y = it->current_y; | |
90aa2856 GM |
7751 | |
7752 | /* Note that this isn't made use of if the face hasn't a box, | |
7753 | so there's no need to check the face here. */ | |
7754 | it->start_of_box_run_p = 1; | |
5f5c8ee5 GM |
7755 | |
7756 | while (it->current_x < max_x) | |
a2889657 | 7757 | { |
5f5c8ee5 | 7758 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 7759 | |
5f5c8ee5 GM |
7760 | /* Get the next display element. */ |
7761 | if (!get_next_display_element (it)) | |
7762 | break; | |
73af359d | 7763 | |
5f5c8ee5 GM |
7764 | /* Produce glyphs. */ |
7765 | x_before = it->current_x; | |
7766 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
7767 | PRODUCE_GLYPHS (it); | |
daa37602 | 7768 | |
5f5c8ee5 GM |
7769 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
7770 | i = 0; | |
7771 | x = x_before; | |
7772 | while (i < nglyphs) | |
7773 | { | |
7774 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
7775 | ||
7776 | if (x + glyph->pixel_width > max_x) | |
7777 | { | |
7778 | /* Glyph doesn't fit on line. */ | |
7779 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
7780 | it->current_x = x; | |
7781 | goto out; | |
7782 | } | |
daa37602 | 7783 | |
5f5c8ee5 GM |
7784 | ++it->hpos; |
7785 | x += glyph->pixel_width; | |
7786 | ++i; | |
7787 | } | |
7788 | ||
7789 | /* Stop at line ends. */ | |
7790 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
7791 | break; | |
7792 | ||
cafafe0b | 7793 | set_iterator_to_next (it, 1); |
a2889657 | 7794 | } |
a2889657 | 7795 | |
5f5c8ee5 | 7796 | out:; |
a2889657 | 7797 | |
5f5c8ee5 GM |
7798 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
7799 | extend_face_to_end_of_line (it); | |
7800 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
7801 | last->right_box_line_p = 1; | |
90aa2856 GM |
7802 | if (last == row->glyphs[TEXT_AREA]) |
7803 | last->left_box_line_p = 1; | |
5f5c8ee5 GM |
7804 | compute_line_metrics (it); |
7805 | ||
e037b9ec | 7806 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
7807 | if (!row->displays_text_p) |
7808 | { | |
312246d1 GM |
7809 | row->height = row->phys_height = it->last_visible_y - row->y; |
7810 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
7811 | } |
7812 | ||
7813 | row->full_width_p = 1; | |
7814 | row->continued_p = 0; | |
7815 | row->truncated_on_left_p = 0; | |
7816 | row->truncated_on_right_p = 0; | |
7817 | ||
7818 | it->current_x = it->hpos = 0; | |
7819 | it->current_y += row->height; | |
7820 | ++it->vpos; | |
7821 | ++it->glyph_row; | |
a2889657 | 7822 | } |
96a410bc | 7823 | |
5f5c8ee5 | 7824 | |
e037b9ec | 7825 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 7826 | items of frame F visible. */ |
96a410bc | 7827 | |
d39b6696 | 7828 | static int |
e037b9ec | 7829 | tool_bar_lines_needed (f) |
5f5c8ee5 | 7830 | struct frame *f; |
d39b6696 | 7831 | { |
e037b9ec | 7832 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
7833 | struct it it; |
7834 | ||
e037b9ec GM |
7835 | /* Initialize an iterator for iteration over |
7836 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
7837 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7838 | it.first_visible_x = 0; |
7839 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 7840 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
7841 | |
7842 | while (!ITERATOR_AT_END_P (&it)) | |
7843 | { | |
7844 | it.glyph_row = w->desired_matrix->rows; | |
7845 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 7846 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
7847 | } |
7848 | ||
7849 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 7850 | } |
96a410bc | 7851 | |
5f5c8ee5 | 7852 | |
57c28064 GM |
7853 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
7854 | 0, 1, 0, | |
7ee72033 MB |
7855 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
7856 | (frame) | |
57c28064 GM |
7857 | Lisp_Object frame; |
7858 | { | |
7859 | struct frame *f; | |
7860 | struct window *w; | |
7861 | int nlines = 0; | |
7862 | ||
7863 | if (NILP (frame)) | |
7864 | frame = selected_frame; | |
7865 | else | |
b7826503 | 7866 | CHECK_FRAME (frame); |
57c28064 GM |
7867 | f = XFRAME (frame); |
7868 | ||
7869 | if (WINDOWP (f->tool_bar_window) | |
7870 | || (w = XWINDOW (f->tool_bar_window), | |
7871 | XFASTINT (w->height) > 0)) | |
7872 | { | |
7873 | update_tool_bar (f, 1); | |
7874 | if (f->n_tool_bar_items) | |
7875 | { | |
7876 | build_desired_tool_bar_string (f); | |
7877 | nlines = tool_bar_lines_needed (f); | |
7878 | } | |
7879 | } | |
7880 | ||
7881 | return make_number (nlines); | |
7882 | } | |
7883 | ||
7884 | ||
e037b9ec | 7885 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
7886 | height should be changed. */ |
7887 | ||
7888 | static int | |
e037b9ec | 7889 | redisplay_tool_bar (f) |
5f5c8ee5 | 7890 | struct frame *f; |
96a410bc | 7891 | { |
5f5c8ee5 GM |
7892 | struct window *w; |
7893 | struct it it; | |
7894 | struct glyph_row *row; | |
7895 | int change_height_p = 0; | |
7896 | ||
e037b9ec GM |
7897 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
7898 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 7899 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
7900 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
7901 | if (!WINDOWP (f->tool_bar_window) | |
7902 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
7903 | XFASTINT (w->height) == 0)) |
7904 | return 0; | |
96a410bc | 7905 | |
e037b9ec GM |
7906 | /* Set up an iterator for the tool-bar window. */ |
7907 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7908 | it.first_visible_x = 0; |
7909 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
7910 | row = it.glyph_row; | |
3450d04c | 7911 | |
e037b9ec GM |
7912 | /* Build a string that represents the contents of the tool-bar. */ |
7913 | build_desired_tool_bar_string (f); | |
7914 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 7915 | |
e037b9ec | 7916 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 7917 | while (it.current_y < it.last_visible_y) |
e037b9ec | 7918 | display_tool_bar_line (&it); |
3450d04c | 7919 | |
e037b9ec | 7920 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
7921 | window, so don't do it. */ |
7922 | w->desired_matrix->no_scrolling_p = 1; | |
7923 | w->must_be_updated_p = 1; | |
3450d04c | 7924 | |
e037b9ec | 7925 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
7926 | { |
7927 | int nlines; | |
6e33e6f0 GM |
7928 | |
7929 | /* If we couldn't display everything, change the tool-bar's | |
7930 | height. */ | |
7931 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
7932 | change_height_p = 1; | |
5f5c8ee5 GM |
7933 | |
7934 | /* If there are blank lines at the end, except for a partially | |
7935 | visible blank line at the end that is smaller than | |
e037b9ec | 7936 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
7937 | row = it.glyph_row - 1; |
7938 | if (!row->displays_text_p | |
7939 | && row->height >= CANON_Y_UNIT (f)) | |
7940 | change_height_p = 1; | |
7941 | ||
e037b9ec GM |
7942 | /* If row displays tool-bar items, but is partially visible, |
7943 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
7944 | if (row->displays_text_p |
7945 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
7946 | change_height_p = 1; | |
7947 | ||
e037b9ec | 7948 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
7949 | frame parameter. */ |
7950 | if (change_height_p | |
e037b9ec | 7951 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
7952 | nlines != XFASTINT (w->height))) |
7953 | { | |
e037b9ec | 7954 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 7955 | Lisp_Object frame; |
e85ee976 | 7956 | int old_height = XFASTINT (w->height); |
5f5c8ee5 GM |
7957 | |
7958 | XSETFRAME (frame, f); | |
7959 | clear_glyph_matrix (w->desired_matrix); | |
7960 | Fmodify_frame_parameters (frame, | |
e037b9ec | 7961 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
7962 | make_number (nlines)), |
7963 | Qnil)); | |
e85ee976 GM |
7964 | if (XFASTINT (w->height) != old_height) |
7965 | fonts_changed_p = 1; | |
5f5c8ee5 GM |
7966 | } |
7967 | } | |
3450d04c | 7968 | |
5f5c8ee5 | 7969 | return change_height_p; |
96a410bc | 7970 | } |
90adcf20 | 7971 | |
5f5c8ee5 | 7972 | |
e037b9ec GM |
7973 | /* Get information about the tool-bar item which is displayed in GLYPH |
7974 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 7975 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 7976 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 GM |
7977 | |
7978 | int | |
e037b9ec | 7979 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
7980 | struct frame *f; |
7981 | struct glyph *glyph; | |
7982 | int *prop_idx; | |
90adcf20 | 7983 | { |
5f5c8ee5 GM |
7984 | Lisp_Object prop; |
7985 | int success_p; | |
be676094 GM |
7986 | int charpos; |
7987 | ||
7988 | /* This function can be called asynchronously, which means we must | |
7989 | exclude any possibility that Fget_text_property signals an | |
7990 | error. */ | |
7991 | charpos = min (XSTRING (f->current_tool_bar_string)->size, glyph->charpos); | |
7992 | charpos = max (0, charpos); | |
5f5c8ee5 GM |
7993 | |
7994 | /* Get the text property `menu-item' at pos. The value of that | |
7995 | property is the start index of this item's properties in | |
7464726e | 7996 | F->tool_bar_items. */ |
be676094 | 7997 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 7998 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
7999 | if (INTEGERP (prop)) |
8000 | { | |
8001 | *prop_idx = XINT (prop); | |
8002 | success_p = 1; | |
8003 | } | |
8004 | else | |
8005 | success_p = 0; | |
90adcf20 | 8006 | |
5f5c8ee5 GM |
8007 | return success_p; |
8008 | } | |
8009 | ||
8010 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 8011 | |
feb0c42f | 8012 | |
5f5c8ee5 GM |
8013 | \f |
8014 | /************************************************************************ | |
8015 | Horizontal scrolling | |
8016 | ************************************************************************/ | |
feb0c42f | 8017 | |
5f5c8ee5 GM |
8018 | static int hscroll_window_tree P_ ((Lisp_Object)); |
8019 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 8020 | |
5f5c8ee5 GM |
8021 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
8022 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
8023 | that it is not within a certain margin at the window's left and | |
8024 | right border. Value is non-zero if any window's hscroll has been | |
8025 | changed. */ | |
8026 | ||
8027 | static int | |
8028 | hscroll_window_tree (window) | |
8029 | Lisp_Object window; | |
8030 | { | |
8031 | int hscrolled_p = 0; | |
e76d28d5 | 8032 | int hscroll_relative_p = FLOATP (Vhscroll_step); |
1df7e8f0 EZ |
8033 | int hscroll_step_abs = 0; |
8034 | double hscroll_step_rel = 0; | |
8035 | ||
8036 | if (hscroll_relative_p) | |
8037 | { | |
e76d28d5 | 8038 | hscroll_step_rel = XFLOAT_DATA (Vhscroll_step); |
1df7e8f0 EZ |
8039 | if (hscroll_step_rel < 0) |
8040 | { | |
8041 | hscroll_relative_p = 0; | |
8042 | hscroll_step_abs = 0; | |
8043 | } | |
8044 | } | |
e76d28d5 | 8045 | else if (INTEGERP (Vhscroll_step)) |
1df7e8f0 | 8046 | { |
e76d28d5 | 8047 | hscroll_step_abs = XINT (Vhscroll_step); |
1df7e8f0 EZ |
8048 | if (hscroll_step_abs < 0) |
8049 | hscroll_step_abs = 0; | |
8050 | } | |
8051 | else | |
8052 | hscroll_step_abs = 0; | |
8053 | ||
5f5c8ee5 | 8054 | while (WINDOWP (window)) |
90adcf20 | 8055 | { |
5f5c8ee5 | 8056 | struct window *w = XWINDOW (window); |
1df7e8f0 | 8057 | |
5f5c8ee5 GM |
8058 | if (WINDOWP (w->hchild)) |
8059 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
8060 | else if (WINDOWP (w->vchild)) | |
8061 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
8062 | else if (w->cursor.vpos >= 0) | |
8063 | { | |
e76d28d5 | 8064 | int h_margin, text_area_x, text_area_y; |
5f5c8ee5 | 8065 | int text_area_width, text_area_height; |
92a90e89 GM |
8066 | struct glyph_row *current_cursor_row |
8067 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
8068 | struct glyph_row *desired_cursor_row | |
8069 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
8070 | struct glyph_row *cursor_row | |
8071 | = (desired_cursor_row->enabled_p | |
8072 | ? desired_cursor_row | |
8073 | : current_cursor_row); | |
a2725ab2 | 8074 | |
5f5c8ee5 GM |
8075 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
8076 | &text_area_width, &text_area_height); | |
90adcf20 | 8077 | |
5f5c8ee5 | 8078 | /* Scroll when cursor is inside this scroll margin. */ |
e76d28d5 | 8079 | h_margin = hscroll_margin * CANON_X_UNIT (XFRAME (w->frame)); |
1df7e8f0 | 8080 | |
5f5c8ee5 | 8081 | if ((XFASTINT (w->hscroll) |
e76d28d5 | 8082 | && w->cursor.x <= h_margin) |
92a90e89 GM |
8083 | || (cursor_row->enabled_p |
8084 | && cursor_row->truncated_on_right_p | |
e76d28d5 | 8085 | && (w->cursor.x >= text_area_width - h_margin))) |
08b610e4 | 8086 | { |
5f5c8ee5 GM |
8087 | struct it it; |
8088 | int hscroll; | |
8089 | struct buffer *saved_current_buffer; | |
8090 | int pt; | |
1df7e8f0 | 8091 | int wanted_x; |
5f5c8ee5 GM |
8092 | |
8093 | /* Find point in a display of infinite width. */ | |
8094 | saved_current_buffer = current_buffer; | |
8095 | current_buffer = XBUFFER (w->buffer); | |
1df7e8f0 | 8096 | |
5f5c8ee5 GM |
8097 | if (w == XWINDOW (selected_window)) |
8098 | pt = BUF_PT (current_buffer); | |
8099 | else | |
08b610e4 | 8100 | { |
5f5c8ee5 GM |
8101 | pt = marker_position (w->pointm); |
8102 | pt = max (BEGV, pt); | |
8103 | pt = min (ZV, pt); | |
8104 | } | |
8105 | ||
8106 | /* Move iterator to pt starting at cursor_row->start in | |
8107 | a line with infinite width. */ | |
8108 | init_to_row_start (&it, w, cursor_row); | |
8109 | it.last_visible_x = INFINITY; | |
8110 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
8111 | current_buffer = saved_current_buffer; | |
8112 | ||
1df7e8f0 EZ |
8113 | /* Position cursor in window. */ |
8114 | if (!hscroll_relative_p && hscroll_step_abs == 0) | |
8115 | hscroll = max (0, it.current_x - text_area_width / 2) | |
8116 | / CANON_X_UNIT (it.f); | |
e76d28d5 | 8117 | else if (w->cursor.x >= text_area_width - h_margin) |
1df7e8f0 EZ |
8118 | { |
8119 | if (hscroll_relative_p) | |
8120 | wanted_x = text_area_width * (1 - hscroll_step_rel) | |
e76d28d5 | 8121 | - h_margin; |
1df7e8f0 EZ |
8122 | else |
8123 | wanted_x = text_area_width | |
8124 | - hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8125 | - h_margin; |
1df7e8f0 EZ |
8126 | hscroll |
8127 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8128 | } | |
8129 | else | |
8130 | { | |
8131 | if (hscroll_relative_p) | |
8132 | wanted_x = text_area_width * hscroll_step_rel | |
e76d28d5 | 8133 | + h_margin; |
1df7e8f0 EZ |
8134 | else |
8135 | wanted_x = hscroll_step_abs * CANON_X_UNIT (it.f) | |
e76d28d5 | 8136 | + h_margin; |
1df7e8f0 EZ |
8137 | hscroll |
8138 | = max (0, it.current_x - wanted_x) / CANON_X_UNIT (it.f); | |
8139 | } | |
3172f70b | 8140 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
8141 | |
8142 | /* Don't call Fset_window_hscroll if value hasn't | |
8143 | changed because it will prevent redisplay | |
8144 | optimizations. */ | |
8145 | if (XFASTINT (w->hscroll) != hscroll) | |
8146 | { | |
3172f70b GM |
8147 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
8148 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 8149 | hscrolled_p = 1; |
08b610e4 | 8150 | } |
08b610e4 | 8151 | } |
08b610e4 | 8152 | } |
a2725ab2 | 8153 | |
5f5c8ee5 | 8154 | window = w->next; |
90adcf20 | 8155 | } |
cd6dfed6 | 8156 | |
5f5c8ee5 GM |
8157 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
8158 | return hscrolled_p; | |
8159 | } | |
8160 | ||
8161 | ||
8162 | /* Set hscroll so that cursor is visible and not inside horizontal | |
8163 | scroll margins for all windows in the tree rooted at WINDOW. See | |
8164 | also hscroll_window_tree above. Value is non-zero if any window's | |
8165 | hscroll has been changed. If it has, desired matrices on the frame | |
8166 | of WINDOW are cleared. */ | |
8167 | ||
8168 | static int | |
8169 | hscroll_windows (window) | |
8170 | Lisp_Object window; | |
8171 | { | |
d475bcb8 GM |
8172 | int hscrolled_p; |
8173 | ||
8174 | if (automatic_hscrolling_p) | |
8175 | { | |
8176 | hscrolled_p = hscroll_window_tree (window); | |
8177 | if (hscrolled_p) | |
8178 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
8179 | } | |
8180 | else | |
8181 | hscrolled_p = 0; | |
5f5c8ee5 | 8182 | return hscrolled_p; |
90adcf20 | 8183 | } |
5f5c8ee5 GM |
8184 | |
8185 | ||
90adcf20 | 8186 | \f |
5f5c8ee5 GM |
8187 | /************************************************************************ |
8188 | Redisplay | |
8189 | ************************************************************************/ | |
8190 | ||
8191 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
8192 | to a non-zero value. This is sometimes handy to have in a debugger | |
8193 | session. */ | |
8194 | ||
8195 | #if GLYPH_DEBUG | |
a2889657 | 8196 | |
5f5c8ee5 GM |
8197 | /* First and last unchanged row for try_window_id. */ |
8198 | ||
8199 | int debug_first_unchanged_at_end_vpos; | |
8200 | int debug_last_unchanged_at_beg_vpos; | |
8201 | ||
8202 | /* Delta vpos and y. */ | |
8203 | ||
8204 | int debug_dvpos, debug_dy; | |
8205 | ||
8206 | /* Delta in characters and bytes for try_window_id. */ | |
8207 | ||
8208 | int debug_delta, debug_delta_bytes; | |
8209 | ||
8210 | /* Values of window_end_pos and window_end_vpos at the end of | |
8211 | try_window_id. */ | |
8212 | ||
31ade731 | 8213 | EMACS_INT debug_end_pos, debug_end_vpos; |
5f5c8ee5 GM |
8214 | |
8215 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
8216 | format string. A1...A9 are a supplement for a variable-length | |
8217 | argument list. If trace_redisplay_p is non-zero also printf the | |
8218 | resulting string to stderr. */ | |
8219 | ||
8220 | static void | |
8221 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
8222 | struct window *w; | |
8223 | char *fmt; | |
8224 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
8225 | { | |
8226 | char buffer[512]; | |
8227 | char *method = w->desired_matrix->method; | |
8228 | int len = strlen (method); | |
8229 | int size = sizeof w->desired_matrix->method; | |
8230 | int remaining = size - len - 1; | |
8231 | ||
8232 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
8233 | if (len && remaining) | |
8234 | { | |
8235 | method[len] = '|'; | |
8236 | --remaining, ++len; | |
8237 | } | |
8238 | ||
8239 | strncpy (method + len, buffer, remaining); | |
8240 | ||
8241 | if (trace_redisplay_p) | |
8242 | fprintf (stderr, "%p (%s): %s\n", | |
8243 | w, | |
8244 | ((BUFFERP (w->buffer) | |
8245 | && STRINGP (XBUFFER (w->buffer)->name)) | |
8246 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
8247 | : "no buffer"), | |
8248 | buffer); | |
8249 | } | |
a2889657 | 8250 | |
5f5c8ee5 | 8251 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 8252 | |
a2889657 | 8253 | |
5f5c8ee5 GM |
8254 | /* This counter is used to clear the face cache every once in a while |
8255 | in redisplay_internal. It is incremented for each redisplay. | |
8256 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
8257 | cleared. */ | |
0d231165 | 8258 | |
bb336f8d | 8259 | #define CLEAR_FACE_CACHE_COUNT 500 |
463f6b91 RS |
8260 | static int clear_face_cache_count; |
8261 | ||
20de20dc | 8262 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
8263 | |
8264 | static struct frame *previous_terminal_frame; | |
8265 | ||
8266 | /* Non-zero while redisplay_internal is in progress. */ | |
8267 | ||
8268 | int redisplaying_p; | |
8269 | ||
8270 | ||
8271 | /* Value is non-zero if all changes in window W, which displays | |
8272 | current_buffer, are in the text between START and END. START is a | |
8273 | buffer position, END is given as a distance from Z. Used in | |
8274 | redisplay_internal for display optimization. */ | |
8275 | ||
8276 | static INLINE int | |
8277 | text_outside_line_unchanged_p (w, start, end) | |
8278 | struct window *w; | |
8279 | int start, end; | |
8280 | { | |
8281 | int unchanged_p = 1; | |
8282 | ||
8283 | /* If text or overlays have changed, see where. */ | |
8284 | if (XFASTINT (w->last_modified) < MODIFF | |
8285 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
8286 | { | |
8287 | /* Gap in the line? */ | |
8288 | if (GPT < start || Z - GPT < end) | |
8289 | unchanged_p = 0; | |
8290 | ||
8291 | /* Changes start in front of the line, or end after it? */ | |
8292 | if (unchanged_p | |
9142dd5b GM |
8293 | && (BEG_UNCHANGED < start - 1 |
8294 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
8295 | unchanged_p = 0; |
8296 | ||
8297 | /* If selective display, can't optimize if changes start at the | |
8298 | beginning of the line. */ | |
8299 | if (unchanged_p | |
8300 | && INTEGERP (current_buffer->selective_display) | |
8301 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 8302 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 8303 | unchanged_p = 0; |
47d57b22 GM |
8304 | |
8305 | /* If there are overlays at the start or end of the line, these | |
8306 | may have overlay strings with newlines in them. A change at | |
8307 | START, for instance, may actually concern the display of such | |
8308 | overlay strings as well, and they are displayed on different | |
8309 | lines. So, quickly rule out this case. (For the future, it | |
8310 | might be desirable to implement something more telling than | |
8311 | just BEG/END_UNCHANGED.) */ | |
8312 | if (unchanged_p) | |
8313 | { | |
8314 | if (BEG + BEG_UNCHANGED == start | |
8315 | && overlay_touches_p (start)) | |
8316 | unchanged_p = 0; | |
8317 | if (END_UNCHANGED == end | |
8318 | && overlay_touches_p (Z - end)) | |
8319 | unchanged_p = 0; | |
8320 | } | |
5f5c8ee5 GM |
8321 | } |
8322 | ||
8323 | return unchanged_p; | |
8324 | } | |
8325 | ||
8326 | ||
8327 | /* Do a frame update, taking possible shortcuts into account. This is | |
8328 | the main external entry point for redisplay. | |
8329 | ||
8330 | If the last redisplay displayed an echo area message and that message | |
8331 | is no longer requested, we clear the echo area or bring back the | |
8332 | mini-buffer if that is in use. */ | |
20de20dc | 8333 | |
a2889657 JB |
8334 | void |
8335 | redisplay () | |
e9874cee RS |
8336 | { |
8337 | redisplay_internal (0); | |
8338 | } | |
8339 | ||
47d57b22 | 8340 | |
260a86a0 KH |
8341 | /* Return 1 if point moved out of or into a composition. Otherwise |
8342 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
8343 | position. BUF and PT are the current point buffer and position. */ | |
8344 | ||
8345 | int | |
8346 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
8347 | struct buffer *prev_buf, *buf; | |
8348 | int prev_pt, pt; | |
8349 | { | |
8350 | int start, end; | |
8351 | Lisp_Object prop; | |
8352 | Lisp_Object buffer; | |
8353 | ||
8354 | XSETBUFFER (buffer, buf); | |
8355 | /* Check a composition at the last point if point moved within the | |
8356 | same buffer. */ | |
8357 | if (prev_buf == buf) | |
8358 | { | |
8359 | if (prev_pt == pt) | |
8360 | /* Point didn't move. */ | |
8361 | return 0; | |
8362 | ||
8363 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) | |
8364 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
8365 | && COMPOSITION_VALID_P (start, end, prop) | |
8366 | && start < prev_pt && end > prev_pt) | |
8367 | /* The last point was within the composition. Return 1 iff | |
8368 | point moved out of the composition. */ | |
8369 | return (pt <= start || pt >= end); | |
8370 | } | |
8371 | ||
8372 | /* Check a composition at the current point. */ | |
8373 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
8374 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
8375 | && COMPOSITION_VALID_P (start, end, prop) | |
8376 | && start < pt && end > pt); | |
8377 | } | |
5f5c8ee5 | 8378 | |
47d57b22 | 8379 | |
9142dd5b GM |
8380 | /* Reconsider the setting of B->clip_changed which is displayed |
8381 | in window W. */ | |
8382 | ||
8383 | static INLINE void | |
8384 | reconsider_clip_changes (w, b) | |
8385 | struct window *w; | |
8386 | struct buffer *b; | |
8387 | { | |
8388 | if (b->prevent_redisplay_optimizations_p) | |
8389 | b->clip_changed = 1; | |
8390 | else if (b->clip_changed | |
8391 | && !NILP (w->window_end_valid) | |
8392 | && w->current_matrix->buffer == b | |
8393 | && w->current_matrix->zv == BUF_ZV (b) | |
8394 | && w->current_matrix->begv == BUF_BEGV (b)) | |
8395 | b->clip_changed = 0; | |
260a86a0 KH |
8396 | |
8397 | /* If display wasn't paused, and W is not a tool bar window, see if | |
8398 | point has been moved into or out of a composition. In that case, | |
8399 | we set b->clip_changed to 1 to force updating the screen. If | |
8400 | b->clip_changed has already been set to 1, we can skip this | |
8401 | check. */ | |
8402 | if (!b->clip_changed | |
8403 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
8404 | { | |
8405 | int pt; | |
8406 | ||
8407 | if (w == XWINDOW (selected_window)) | |
8408 | pt = BUF_PT (current_buffer); | |
8409 | else | |
8410 | pt = marker_position (w->pointm); | |
8411 | ||
8412 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 8413 | || pt != XINT (w->last_point)) |
260a86a0 | 8414 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 8415 | XINT (w->last_point), |
260a86a0 KH |
8416 | XBUFFER (w->buffer), pt)) |
8417 | b->clip_changed = 1; | |
8418 | } | |
9142dd5b GM |
8419 | } |
8420 | ||
8421 | ||
5f5c8ee5 GM |
8422 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
8423 | response to any user action; therefore, we should preserve the echo | |
8424 | area. (Actually, our caller does that job.) Perhaps in the future | |
8425 | avoid recentering windows if it is not necessary; currently that | |
8426 | causes some problems. */ | |
e9874cee RS |
8427 | |
8428 | static void | |
8429 | redisplay_internal (preserve_echo_area) | |
8430 | int preserve_echo_area; | |
a2889657 | 8431 | { |
5f5c8ee5 GM |
8432 | struct window *w = XWINDOW (selected_window); |
8433 | struct frame *f = XFRAME (w->frame); | |
8434 | int pause; | |
a2889657 | 8435 | int must_finish = 0; |
5f5c8ee5 | 8436 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 8437 | int number_of_visible_frames; |
28514cd9 | 8438 | int count; |
886bd6f2 | 8439 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 8440 | |
5f5c8ee5 GM |
8441 | /* Non-zero means redisplay has to consider all windows on all |
8442 | frames. Zero means, only selected_window is considered. */ | |
8443 | int consider_all_windows_p; | |
8444 | ||
8445 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
8446 | ||
8447 | /* No redisplay if running in batch mode or frame is not yet fully | |
8448 | initialized, or redisplay is explicitly turned off by setting | |
8449 | Vinhibit_redisplay. */ | |
8450 | if (noninteractive | |
8451 | || !NILP (Vinhibit_redisplay) | |
8452 | || !f->glyphs_initialized_p) | |
a2889657 JB |
8453 | return; |
8454 | ||
5f5c8ee5 GM |
8455 | /* The flag redisplay_performed_directly_p is set by |
8456 | direct_output_for_insert when it already did the whole screen | |
8457 | update necessary. */ | |
8458 | if (redisplay_performed_directly_p) | |
8459 | { | |
8460 | redisplay_performed_directly_p = 0; | |
8461 | if (!hscroll_windows (selected_window)) | |
8462 | return; | |
8463 | } | |
8464 | ||
15f0cf78 RS |
8465 | #ifdef USE_X_TOOLKIT |
8466 | if (popup_activated ()) | |
8467 | return; | |
8468 | #endif | |
8469 | ||
28514cd9 | 8470 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 8471 | if (redisplaying_p) |
735c094c KH |
8472 | return; |
8473 | ||
28514cd9 GM |
8474 | /* Record a function that resets redisplaying_p to its old value |
8475 | when we leave this function. */ | |
2d27dae2 | 8476 | count = BINDING_STACK_SIZE (); |
28514cd9 GM |
8477 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); |
8478 | ++redisplaying_p; | |
8479 | ||
8b32d885 | 8480 | retry: |
bd9d0f3f | 8481 | pause = 0; |
9142dd5b GM |
8482 | reconsider_clip_changes (w, current_buffer); |
8483 | ||
5f5c8ee5 GM |
8484 | /* If new fonts have been loaded that make a glyph matrix adjustment |
8485 | necessary, do it. */ | |
8486 | if (fonts_changed_p) | |
8487 | { | |
8488 | adjust_glyphs (NULL); | |
8489 | ++windows_or_buffers_changed; | |
8490 | fonts_changed_p = 0; | |
8491 | } | |
8492 | ||
6961e0c1 GM |
8493 | /* If face_change_count is non-zero, init_iterator will free all |
8494 | realized faces, which includes the faces referenced from current | |
8495 | matrices. So, we can't reuse current matrices in this case. */ | |
8496 | if (face_change_count) | |
8497 | ++windows_or_buffers_changed; | |
8498 | ||
886bd6f2 GM |
8499 | if (! FRAME_WINDOW_P (sf) |
8500 | && previous_terminal_frame != sf) | |
20de20dc | 8501 | { |
5f5c8ee5 GM |
8502 | /* Since frames on an ASCII terminal share the same display |
8503 | area, displaying a different frame means redisplay the whole | |
8504 | thing. */ | |
20de20dc | 8505 | windows_or_buffers_changed++; |
886bd6f2 GM |
8506 | SET_FRAME_GARBAGED (sf); |
8507 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 8508 | } |
886bd6f2 | 8509 | previous_terminal_frame = sf; |
20de20dc | 8510 | |
5f5c8ee5 GM |
8511 | /* Set the visible flags for all frames. Do this before checking |
8512 | for resized or garbaged frames; they want to know if their frames | |
8513 | are visible. See the comment in frame.h for | |
8514 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 8515 | { |
35f56f96 | 8516 | Lisp_Object tail, frame; |
d724d989 | 8517 | |
89819bdd RS |
8518 | number_of_visible_frames = 0; |
8519 | ||
35f56f96 | 8520 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 8521 | { |
5f5c8ee5 GM |
8522 | struct frame *f = XFRAME (frame); |
8523 | ||
8524 | FRAME_SAMPLE_VISIBILITY (f); | |
8525 | if (FRAME_VISIBLE_P (f)) | |
8526 | ++number_of_visible_frames; | |
8527 | clear_desired_matrices (f); | |
f82aff7c | 8528 | } |
d724d989 JB |
8529 | } |
8530 | ||
44fa5b1e | 8531 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 8532 | do_pending_window_change (1); |
a2889657 | 8533 | |
5f5c8ee5 | 8534 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 8535 | if (frame_garbaged) |
c6e89d6c | 8536 | clear_garbaged_frames (); |
a2889657 | 8537 | |
e037b9ec | 8538 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
8539 | prepare_menu_bars (); |
8540 | ||
28995e67 | 8541 | if (windows_or_buffers_changed) |
a2889657 JB |
8542 | update_mode_lines++; |
8543 | ||
538f13d4 RS |
8544 | /* Detect case that we need to write or remove a star in the mode line. */ |
8545 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
8546 | { |
8547 | w->update_mode_line = Qt; | |
8548 | if (buffer_shared > 1) | |
8549 | update_mode_lines++; | |
8550 | } | |
8551 | ||
5f5c8ee5 | 8552 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
8553 | if (!NILP (w->column_number_displayed) |
8554 | /* This alternative quickly identifies a common case | |
8555 | where no change is needed. */ | |
8556 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8557 | && XFASTINT (w->last_modified) >= MODIFF |
8558 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8559 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8560 | w->update_mode_line = Qt; | |
8561 | ||
44fa5b1e | 8562 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 8563 | |
5f5c8ee5 GM |
8564 | /* The variable buffer_shared is set in redisplay_window and |
8565 | indicates that we redisplay a buffer in different windows. See | |
8566 | there. */ | |
8567 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
8568 | |
8569 | /* If specs for an arrow have changed, do thorough redisplay | |
8570 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 8571 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 8572 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 8573 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 8574 | |
90adcf20 RS |
8575 | /* Normally the message* functions will have already displayed and |
8576 | updated the echo area, but the frame may have been trashed, or | |
8577 | the update may have been preempted, so display the echo area | |
6e019995 | 8578 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 8579 | the echo area should be cleared. */ |
96d5e9a0 GM |
8580 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
8581 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
8582 | || (message_cleared_p |
8583 | && minibuf_level == 0 | |
8584 | /* If the mini-window is currently selected, this means the | |
8585 | echo-area doesn't show through. */ | |
8586 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 8587 | { |
c6e89d6c | 8588 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 8589 | must_finish = 1; |
6e019995 GM |
8590 | |
8591 | /* If we don't display the current message, don't clear the | |
8592 | message_cleared_p flag, because, if we did, we wouldn't clear | |
8593 | the echo area in the next redisplay which doesn't preserve | |
8594 | the echo area. */ | |
8595 | if (!display_last_displayed_message_p) | |
8596 | message_cleared_p = 0; | |
dd2eb166 | 8597 | |
c6e89d6c GM |
8598 | if (fonts_changed_p) |
8599 | goto retry; | |
8600 | else if (window_height_changed_p) | |
8601 | { | |
8602 | consider_all_windows_p = 1; | |
8603 | ++update_mode_lines; | |
8604 | ++windows_or_buffers_changed; | |
9142dd5b GM |
8605 | |
8606 | /* If window configuration was changed, frames may have been | |
8607 | marked garbaged. Clear them or we will experience | |
8608 | surprises wrt scrolling. */ | |
8609 | if (frame_garbaged) | |
8610 | clear_garbaged_frames (); | |
c6e89d6c | 8611 | } |
90adcf20 | 8612 | } |
97a36635 | 8613 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
8614 | && (current_buffer->clip_changed |
8615 | || XFASTINT (w->last_modified) < MODIFF | |
8616 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 8617 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
8618 | { |
8619 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
8620 | showing if its contents might have changed. */ |
8621 | must_finish = 1; | |
8622 | consider_all_windows_p = 1; | |
c6e89d6c | 8623 | ++windows_or_buffers_changed; |
dd2eb166 | 8624 | ++update_mode_lines; |
9142dd5b GM |
8625 | |
8626 | /* If window configuration was changed, frames may have been | |
8627 | marked garbaged. Clear them or we will experience | |
8628 | surprises wrt scrolling. */ | |
8629 | if (frame_garbaged) | |
8630 | clear_garbaged_frames (); | |
c6e89d6c GM |
8631 | } |
8632 | ||
90adcf20 | 8633 | |
5f5c8ee5 GM |
8634 | /* If showing the region, and mark has changed, we must redisplay |
8635 | the whole window. The assignment to this_line_start_pos prevents | |
8636 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
8637 | if (((!NILP (Vtransient_mark_mode) |
8638 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
8639 | != !NILP (w->region_showing)) | |
82d04750 JB |
8640 | || (!NILP (w->region_showing) |
8641 | && !EQ (w->region_showing, | |
8642 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
8643 | CHARPOS (this_line_start_pos) = 0; |
8644 | ||
8645 | /* Optimize the case that only the line containing the cursor in the | |
8646 | selected window has changed. Variables starting with this_ are | |
8647 | set in display_line and record information about the line | |
8648 | containing the cursor. */ | |
8649 | tlbufpos = this_line_start_pos; | |
8650 | tlendpos = this_line_end_pos; | |
8651 | if (!consider_all_windows_p | |
8652 | && CHARPOS (tlbufpos) > 0 | |
8653 | && NILP (w->update_mode_line) | |
73af359d | 8654 | && !current_buffer->clip_changed |
44fa5b1e | 8655 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 8656 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 8657 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
8658 | && this_line_buffer == current_buffer |
8659 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 8660 | && NILP (w->force_start) |
5f5c8ee5 GM |
8661 | /* Point must be on the line that we have info recorded about. */ |
8662 | && PT >= CHARPOS (tlbufpos) | |
8663 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
8664 | /* All text outside that line, including its final newline, |
8665 | must be unchanged */ | |
5f5c8ee5 GM |
8666 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
8667 | CHARPOS (tlendpos))) | |
8668 | { | |
8669 | if (CHARPOS (tlbufpos) > BEGV | |
8670 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
8671 | && (CHARPOS (tlbufpos) == ZV | |
8672 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
8673 | /* Former continuation line has disappeared by becoming empty */ |
8674 | goto cancel; | |
8675 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 8676 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
8677 | || MINI_WINDOW_P (w)) |
8678 | { | |
1c9241f5 KH |
8679 | /* We have to handle the case of continuation around a |
8680 | wide-column character (See the comment in indent.c around | |
8681 | line 885). | |
8682 | ||
8683 | For instance, in the following case: | |
8684 | ||
8685 | -------- Insert -------- | |
8686 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
8687 | J_I_ ==> J_I_ `^^' are cursors. | |
8688 | ^^ ^^ | |
8689 | -------- -------- | |
8690 | ||
8691 | As we have to redraw the line above, we should goto cancel. */ | |
8692 | ||
5f5c8ee5 GM |
8693 | struct it it; |
8694 | int line_height_before = this_line_pixel_height; | |
8695 | ||
8696 | /* Note that start_display will handle the case that the | |
8697 | line starting at tlbufpos is a continuation lines. */ | |
8698 | start_display (&it, w, tlbufpos); | |
8699 | ||
8700 | /* Implementation note: It this still necessary? */ | |
8701 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
8702 | goto cancel; |
8703 | ||
5f5c8ee5 GM |
8704 | TRACE ((stderr, "trying display optimization 1\n")); |
8705 | w->cursor.vpos = -1; | |
a2889657 | 8706 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
8707 | it.vpos = this_line_vpos; |
8708 | it.current_y = this_line_y; | |
8709 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
8710 | display_line (&it); | |
8711 | ||
a2889657 | 8712 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
8713 | and ends at same distance from eob as before, we win */ |
8714 | if (w->cursor.vpos >= 0 | |
8715 | /* Line is not continued, otherwise this_line_start_pos | |
8716 | would have been set to 0 in display_line. */ | |
8717 | && CHARPOS (this_line_start_pos) | |
8718 | /* Line ends as before. */ | |
8719 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
8720 | /* Line has same height as before. Otherwise other lines | |
8721 | would have to be shifted up or down. */ | |
8722 | && this_line_pixel_height == line_height_before) | |
a2889657 | 8723 | { |
5f5c8ee5 GM |
8724 | /* If this is not the window's last line, we must adjust |
8725 | the charstarts of the lines below. */ | |
8726 | if (it.current_y < it.last_visible_y) | |
8727 | { | |
8728 | struct glyph_row *row | |
8729 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
8730 | int delta, delta_bytes; | |
8731 | ||
8732 | if (Z - CHARPOS (tlendpos) == ZV) | |
8733 | { | |
8734 | /* This line ends at end of (accessible part of) | |
8735 | buffer. There is no newline to count. */ | |
8736 | delta = (Z | |
8737 | - CHARPOS (tlendpos) | |
8738 | - MATRIX_ROW_START_CHARPOS (row)); | |
8739 | delta_bytes = (Z_BYTE | |
8740 | - BYTEPOS (tlendpos) | |
8741 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8742 | } | |
8743 | else | |
8744 | { | |
8745 | /* This line ends in a newline. Must take | |
8746 | account of the newline and the rest of the | |
8747 | text that follows. */ | |
8748 | delta = (Z | |
8749 | - CHARPOS (tlendpos) | |
8750 | - MATRIX_ROW_START_CHARPOS (row)); | |
8751 | delta_bytes = (Z_BYTE | |
8752 | - BYTEPOS (tlendpos) | |
8753 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8754 | } | |
8755 | ||
f2d86d7a GM |
8756 | increment_matrix_positions (w->current_matrix, |
8757 | this_line_vpos + 1, | |
8758 | w->current_matrix->nrows, | |
8759 | delta, delta_bytes); | |
85bcef6c | 8760 | } |
46db8486 | 8761 | |
5f5c8ee5 GM |
8762 | /* If this row displays text now but previously didn't, |
8763 | or vice versa, w->window_end_vpos may have to be | |
8764 | adjusted. */ | |
8765 | if ((it.glyph_row - 1)->displays_text_p) | |
8766 | { | |
8767 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
8768 | XSETINT (w->window_end_vpos, this_line_vpos); | |
8769 | } | |
8770 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
8771 | && this_line_vpos > 0) | |
8772 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
8773 | w->window_end_valid = Qnil; | |
8774 | ||
8775 | /* Update hint: No need to try to scroll in update_window. */ | |
8776 | w->desired_matrix->no_scrolling_p = 1; | |
8777 | ||
8778 | #if GLYPH_DEBUG | |
8779 | *w->desired_matrix->method = 0; | |
8780 | debug_method_add (w, "optimization 1"); | |
8781 | #endif | |
a2889657 JB |
8782 | goto update; |
8783 | } | |
8784 | else | |
8785 | goto cancel; | |
8786 | } | |
5f5c8ee5 GM |
8787 | else if (/* Cursor position hasn't changed. */ |
8788 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
8789 | /* Make sure the cursor was last displayed |
8790 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
8791 | && 0 <= w->cursor.vpos |
8792 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
8793 | { |
8794 | if (!must_finish) | |
8795 | { | |
c6e89d6c | 8796 | do_pending_window_change (1); |
5f5c8ee5 GM |
8797 | |
8798 | /* We used to always goto end_of_redisplay here, but this | |
8799 | isn't enough if we have a blinking cursor. */ | |
8800 | if (w->cursor_off_p == w->last_cursor_off_p) | |
8801 | goto end_of_redisplay; | |
a2889657 JB |
8802 | } |
8803 | goto update; | |
8804 | } | |
8b51f1e3 KH |
8805 | /* If highlighting the region, or if the cursor is in the echo area, |
8806 | then we can't just move the cursor. */ | |
bd66d1ba RS |
8807 | else if (! (!NILP (Vtransient_mark_mode) |
8808 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 8809 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 8810 | || highlight_nonselected_windows) |
8b51f1e3 | 8811 | && NILP (w->region_showing) |
8f897821 | 8812 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 8813 | && !cursor_in_echo_area) |
a2889657 | 8814 | { |
5f5c8ee5 GM |
8815 | struct it it; |
8816 | struct glyph_row *row; | |
8817 | ||
8818 | /* Skip from tlbufpos to PT and see where it is. Note that | |
8819 | PT may be in invisible text. If so, we will end at the | |
8820 | next visible position. */ | |
8821 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
8822 | NULL, DEFAULT_FACE_ID); | |
8823 | it.current_x = this_line_start_x; | |
8824 | it.current_y = this_line_y; | |
8825 | it.vpos = this_line_vpos; | |
8826 | ||
8827 | /* The call to move_it_to stops in front of PT, but | |
8828 | moves over before-strings. */ | |
8829 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
8830 | ||
8831 | if (it.vpos == this_line_vpos | |
8832 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
8833 | row->enabled_p)) | |
a2889657 | 8834 | { |
5f5c8ee5 GM |
8835 | xassert (this_line_vpos == it.vpos); |
8836 | xassert (this_line_y == it.current_y); | |
8837 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
8838 | #if GLYPH_DEBUG |
8839 | *w->desired_matrix->method = 0; | |
8840 | debug_method_add (w, "optimization 3"); | |
8841 | #endif | |
a2889657 JB |
8842 | goto update; |
8843 | } | |
8844 | else | |
8845 | goto cancel; | |
8846 | } | |
5f5c8ee5 | 8847 | |
a2889657 | 8848 | cancel: |
5f5c8ee5 GM |
8849 | /* Text changed drastically or point moved off of line. */ |
8850 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
8851 | } |
8852 | ||
5f5c8ee5 GM |
8853 | CHARPOS (this_line_start_pos) = 0; |
8854 | consider_all_windows_p |= buffer_shared > 1; | |
8855 | ++clear_face_cache_count; | |
a2889657 | 8856 | |
5f5c8ee5 | 8857 | |
bd9d0f3f GM |
8858 | /* Build desired matrices, and update the display. If |
8859 | consider_all_windows_p is non-zero, do it for all windows on all | |
8860 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 8861 | |
5f5c8ee5 | 8862 | if (consider_all_windows_p) |
a2889657 | 8863 | { |
35f56f96 | 8864 | Lisp_Object tail, frame; |
0528abe1 GM |
8865 | int i, n = 0, size = 50; |
8866 | struct frame **updated | |
8867 | = (struct frame **) alloca (size * sizeof *updated); | |
a2889657 | 8868 | |
5f5c8ee5 GM |
8869 | /* Clear the face cache eventually. */ |
8870 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 8871 | { |
5f5c8ee5 | 8872 | clear_face_cache (0); |
463f6b91 RS |
8873 | clear_face_cache_count = 0; |
8874 | } | |
31b24551 | 8875 | |
5f5c8ee5 GM |
8876 | /* Recompute # windows showing selected buffer. This will be |
8877 | incremented each time such a window is displayed. */ | |
a2889657 JB |
8878 | buffer_shared = 0; |
8879 | ||
35f56f96 | 8880 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 8881 | { |
5f5c8ee5 | 8882 | struct frame *f = XFRAME (frame); |
bd9d0f3f | 8883 | |
886bd6f2 | 8884 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 8885 | { |
ae02e06a | 8886 | #ifdef HAVE_WINDOW_SYSTEM |
bb336f8d RS |
8887 | if (clear_face_cache_count % 50 == 0 |
8888 | && FRAME_WINDOW_P (f)) | |
8889 | clear_image_cache (f, 0); | |
ae02e06a | 8890 | #endif /* HAVE_WINDOW_SYSTEM */ |
bb336f8d | 8891 | |
5f5c8ee5 GM |
8892 | /* Mark all the scroll bars to be removed; we'll redeem |
8893 | the ones we want when we redisplay their windows. */ | |
9769686d | 8894 | if (condemn_scroll_bars_hook) |
504454e8 | 8895 | condemn_scroll_bars_hook (f); |
30c566e4 | 8896 | |
f21ef775 | 8897 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 8898 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 8899 | |
5f5c8ee5 GM |
8900 | /* Any scroll bars which redisplay_windows should have |
8901 | nuked should now go away. */ | |
9769686d | 8902 | if (judge_scroll_bars_hook) |
504454e8 | 8903 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
8904 | |
8905 | /* If fonts changed, display again. */ | |
8906 | if (fonts_changed_p) | |
8907 | goto retry; | |
8908 | ||
8909 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) | |
8910 | { | |
8911 | /* See if we have to hscroll. */ | |
8912 | if (hscroll_windows (f->root_window)) | |
8913 | goto retry; | |
8914 | ||
8915 | /* Prevent various kinds of signals during display | |
8916 | update. stdio is not robust about handling | |
8917 | signals, which can cause an apparent I/O | |
8918 | error. */ | |
8919 | if (interrupt_input) | |
8920 | unrequest_sigio (); | |
8921 | stop_polling (); | |
8922 | ||
8923 | /* Update the display. */ | |
8924 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
8925 | pause |= update_frame (f, 0, 0); | |
8926 | if (pause) | |
8927 | break; | |
8928 | ||
0528abe1 GM |
8929 | if (n == size) |
8930 | { | |
8931 | int nbytes = size * sizeof *updated; | |
8932 | struct frame **p = (struct frame **) alloca (2 * nbytes); | |
8933 | bcopy (updated, p, nbytes); | |
8934 | size *= 2; | |
8935 | } | |
8936 | ||
8937 | updated[n++] = f; | |
bd9d0f3f | 8938 | } |
9769686d | 8939 | } |
30c566e4 | 8940 | } |
0528abe1 GM |
8941 | |
8942 | /* Do the mark_window_display_accurate after all windows have | |
8943 | been redisplayed because this call resets flags in buffers | |
8944 | which are needed for proper redisplay. */ | |
8945 | for (i = 0; i < n; ++i) | |
8946 | { | |
8947 | struct frame *f = updated[i]; | |
8948 | mark_window_display_accurate (f->root_window, 1); | |
8949 | if (frame_up_to_date_hook) | |
8950 | frame_up_to_date_hook (f); | |
8951 | } | |
a2889657 | 8952 | } |
bd9d0f3f GM |
8953 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
8954 | { | |
8955 | Lisp_Object mini_window; | |
8956 | struct frame *mini_frame; | |
5f5c8ee5 | 8957 | |
82a7ab23 RS |
8958 | displayed_buffer = XBUFFER (XWINDOW (selected_window)->buffer); |
8959 | internal_condition_case_1 (redisplay_window_1, selected_window, Qerror, | |
8960 | redisplay_window_error); | |
5f5c8ee5 | 8961 | |
bd9d0f3f GM |
8962 | /* Compare desired and current matrices, perform output. */ |
8963 | update: | |
5f5c8ee5 | 8964 | |
bd9d0f3f GM |
8965 | /* If fonts changed, display again. */ |
8966 | if (fonts_changed_p) | |
92a90e89 | 8967 | goto retry; |
a2889657 | 8968 | |
bd9d0f3f GM |
8969 | /* Prevent various kinds of signals during display update. |
8970 | stdio is not robust about handling signals, | |
8971 | which can cause an apparent I/O error. */ | |
8972 | if (interrupt_input) | |
8973 | unrequest_sigio (); | |
8974 | stop_polling (); | |
1af9f229 | 8975 | |
bd9d0f3f | 8976 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 8977 | { |
92a90e89 GM |
8978 | if (hscroll_windows (selected_window)) |
8979 | goto retry; | |
8980 | ||
5f5c8ee5 | 8981 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 8982 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 8983 | } |
d724d989 | 8984 | |
8de2d90b | 8985 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
8986 | function. If the echo area is on another frame, that may |
8987 | have put text on a frame other than the selected one, so the | |
8988 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 8989 | it here. */ |
bd9d0f3f GM |
8990 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
8991 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 8992 | |
bd9d0f3f GM |
8993 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
8994 | { | |
8995 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
8996 | pause |= update_frame (mini_frame, 0, 0); | |
8997 | if (!pause && hscroll_windows (mini_window)) | |
8998 | goto retry; | |
8999 | } | |
6e8290aa | 9000 | } |
a2889657 | 9001 | |
5f5c8ee5 GM |
9002 | /* If display was paused because of pending input, make sure we do a |
9003 | thorough update the next time. */ | |
a2889657 JB |
9004 | if (pause) |
9005 | { | |
5f5c8ee5 GM |
9006 | /* Prevent the optimization at the beginning of |
9007 | redisplay_internal that tries a single-line update of the | |
9008 | line containing the cursor in the selected window. */ | |
9009 | CHARPOS (this_line_start_pos) = 0; | |
9010 | ||
9011 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 9012 | if (!NILP (last_arrow_position)) |
a2889657 JB |
9013 | { |
9014 | last_arrow_position = Qt; | |
9015 | last_arrow_string = Qt; | |
9016 | } | |
5f5c8ee5 GM |
9017 | |
9018 | /* If we pause after scrolling, some rows in the current | |
9019 | matrices of some windows are not valid. */ | |
9020 | if (!WINDOW_FULL_WIDTH_P (w) | |
9021 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
9022 | update_mode_lines = 1; |
9023 | } | |
43c09969 | 9024 | else |
a2889657 | 9025 | { |
43c09969 | 9026 | if (!consider_all_windows_p) |
a2889657 | 9027 | { |
43c09969 GM |
9028 | /* This has already been done above if |
9029 | consider_all_windows_p is set. */ | |
9030 | mark_window_display_accurate_1 (w, 1); | |
927c5b3b GM |
9031 | |
9032 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); | |
9033 | last_arrow_string = Voverlay_arrow_string; | |
9034 | ||
efc63ef0 | 9035 | if (frame_up_to_date_hook != 0) |
43c09969 | 9036 | frame_up_to_date_hook (sf); |
a2889657 | 9037 | } |
15e26c76 | 9038 | |
a2889657 JB |
9039 | update_mode_lines = 0; |
9040 | windows_or_buffers_changed = 0; | |
9041 | } | |
9042 | ||
5f5c8ee5 GM |
9043 | /* Start SIGIO interrupts coming again. Having them off during the |
9044 | code above makes it less likely one will discard output, but not | |
9045 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 9046 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
9047 | if (interrupt_input) |
9048 | request_sigio (); | |
9049 | start_polling (); | |
9050 | ||
5f5c8ee5 GM |
9051 | /* If a frame has become visible which was not before, redisplay |
9052 | again, so that we display it. Expose events for such a frame | |
9053 | (which it gets when becoming visible) don't call the parts of | |
9054 | redisplay constructing glyphs, so simply exposing a frame won't | |
9055 | display anything in this case. So, we have to display these | |
9056 | frames here explicitly. */ | |
11c52c4f RS |
9057 | if (!pause) |
9058 | { | |
9059 | Lisp_Object tail, frame; | |
9060 | int new_count = 0; | |
9061 | ||
9062 | FOR_EACH_FRAME (tail, frame) | |
9063 | { | |
9064 | int this_is_visible = 0; | |
8e83f802 RS |
9065 | |
9066 | if (XFRAME (frame)->visible) | |
9067 | this_is_visible = 1; | |
9068 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
9069 | if (XFRAME (frame)->visible) | |
9070 | this_is_visible = 1; | |
11c52c4f RS |
9071 | |
9072 | if (this_is_visible) | |
9073 | new_count++; | |
9074 | } | |
9075 | ||
89819bdd | 9076 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
9077 | windows_or_buffers_changed++; |
9078 | } | |
9079 | ||
44fa5b1e | 9080 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 9081 | do_pending_window_change (1); |
d8e242fd | 9082 | |
8b32d885 RS |
9083 | /* If we just did a pending size change, or have additional |
9084 | visible frames, redisplay again. */ | |
3c8c72e0 | 9085 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 9086 | goto retry; |
5f5c8ee5 GM |
9087 | |
9088 | end_of_redisplay:; | |
c6e89d6c | 9089 | |
28514cd9 | 9090 | unbind_to (count, Qnil); |
a2889657 JB |
9091 | } |
9092 | ||
5f5c8ee5 GM |
9093 | |
9094 | /* Redisplay, but leave alone any recent echo area message unless | |
9095 | another message has been requested in its place. | |
a2889657 JB |
9096 | |
9097 | This is useful in situations where you need to redisplay but no | |
9098 | user action has occurred, making it inappropriate for the message | |
9099 | area to be cleared. See tracking_off and | |
9bf76936 GM |
9100 | wait_reading_process_input for examples of these situations. |
9101 | ||
9102 | FROM_WHERE is an integer saying from where this function was | |
9103 | called. This is useful for debugging. */ | |
a2889657 | 9104 | |
8991bb31 | 9105 | void |
9bf76936 GM |
9106 | redisplay_preserve_echo_area (from_where) |
9107 | int from_where; | |
a2889657 | 9108 | { |
9bf76936 GM |
9109 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
9110 | ||
c6e89d6c | 9111 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 9112 | { |
c6e89d6c GM |
9113 | /* We have a previously displayed message, but no current |
9114 | message. Redisplay the previous message. */ | |
9115 | display_last_displayed_message_p = 1; | |
e9874cee | 9116 | redisplay_internal (1); |
c6e89d6c | 9117 | display_last_displayed_message_p = 0; |
a2889657 JB |
9118 | } |
9119 | else | |
e9874cee | 9120 | redisplay_internal (1); |
a2889657 JB |
9121 | } |
9122 | ||
5f5c8ee5 | 9123 | |
28514cd9 GM |
9124 | /* Function registered with record_unwind_protect in |
9125 | redisplay_internal. Clears the flag indicating that a redisplay is | |
9126 | in progress. */ | |
9127 | ||
9128 | static Lisp_Object | |
9129 | unwind_redisplay (old_redisplaying_p) | |
9130 | Lisp_Object old_redisplaying_p; | |
9131 | { | |
9132 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 9133 | return Qnil; |
28514cd9 GM |
9134 | } |
9135 | ||
9136 | ||
43c09969 GM |
9137 | /* Mark the display of window W as accurate or inaccurate. If |
9138 | ACCURATE_P is non-zero mark display of W as accurate. If | |
9139 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
9140 | redisplay_internal is called. */ | |
5f5c8ee5 | 9141 | |
43c09969 GM |
9142 | static void |
9143 | mark_window_display_accurate_1 (w, accurate_p) | |
9144 | struct window *w; | |
5f5c8ee5 | 9145 | int accurate_p; |
a2889657 | 9146 | { |
43c09969 | 9147 | if (BUFFERP (w->buffer)) |
a2889657 | 9148 | { |
43c09969 GM |
9149 | struct buffer *b = XBUFFER (w->buffer); |
9150 | ||
9151 | w->last_modified | |
9152 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
9153 | w->last_overlay_modified | |
9154 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
9155 | w->last_had_star | |
9156 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 9157 | |
43c09969 | 9158 | if (accurate_p) |
bd66d1ba | 9159 | { |
43c09969 GM |
9160 | b->clip_changed = 0; |
9161 | b->prevent_redisplay_optimizations_p = 0; | |
9162 | ||
9163 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
9164 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
9165 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
9166 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
5f5c8ee5 | 9167 | |
43c09969 GM |
9168 | w->current_matrix->buffer = b; |
9169 | w->current_matrix->begv = BUF_BEGV (b); | |
9170 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 | 9171 | |
43c09969 GM |
9172 | w->last_cursor = w->cursor; |
9173 | w->last_cursor_off_p = w->cursor_off_p; | |
9174 | ||
9175 | if (w == XWINDOW (selected_window)) | |
9176 | w->last_point = make_number (BUF_PT (b)); | |
9177 | else | |
9178 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 9179 | } |
43c09969 | 9180 | } |
bd66d1ba | 9181 | |
43c09969 GM |
9182 | if (accurate_p) |
9183 | { | |
d2f84654 | 9184 | w->window_end_valid = w->buffer; |
99332eb6 | 9185 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 GM |
9186 | xassert (XINT (w->window_end_vpos) |
9187 | < (XINT (w->height) | |
9188 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); | |
99332eb6 | 9189 | #endif |
a2889657 | 9190 | w->update_mode_line = Qnil; |
43c09969 GM |
9191 | } |
9192 | } | |
9193 | ||
9194 | ||
9195 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
9196 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
9197 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
9198 | be redisplayed the next time redisplay_internal is called. */ | |
9199 | ||
9200 | void | |
9201 | mark_window_display_accurate (window, accurate_p) | |
9202 | Lisp_Object window; | |
9203 | int accurate_p; | |
9204 | { | |
9205 | struct window *w; | |
9206 | ||
9207 | for (; !NILP (window); window = w->next) | |
9208 | { | |
9209 | w = XWINDOW (window); | |
9210 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 9211 | |
265a9e55 | 9212 | if (!NILP (w->vchild)) |
5f5c8ee5 | 9213 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 9214 | if (!NILP (w->hchild)) |
5f5c8ee5 | 9215 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
9216 | } |
9217 | ||
5f5c8ee5 | 9218 | if (accurate_p) |
a2889657 | 9219 | { |
d45de95b | 9220 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
9221 | last_arrow_string = Voverlay_arrow_string; |
9222 | } | |
9223 | else | |
9224 | { | |
5f5c8ee5 GM |
9225 | /* Force a thorough redisplay the next time by setting |
9226 | last_arrow_position and last_arrow_string to t, which is | |
4b41cebb | 9227 | unequal to any useful value of Voverlay_arrow_... */ |
a2889657 JB |
9228 | last_arrow_position = Qt; |
9229 | last_arrow_string = Qt; | |
9230 | } | |
9231 | } | |
5f5c8ee5 GM |
9232 | |
9233 | ||
9234 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
9235 | C. Since a display table doesn't have any parent, we don't have to | |
9236 | follow parent. Do not call this function directly but use the | |
9237 | macro DISP_CHAR_VECTOR. */ | |
9238 | ||
9239 | Lisp_Object | |
9240 | disp_char_vector (dp, c) | |
9241 | struct Lisp_Char_Table *dp; | |
9242 | int c; | |
9243 | { | |
9244 | int code[4], i; | |
9245 | Lisp_Object val; | |
9246 | ||
9247 | if (SINGLE_BYTE_CHAR_P (c)) | |
9248 | return (dp->contents[c]); | |
9249 | ||
c5924f47 | 9250 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
9251 | if (code[1] < 32) |
9252 | code[1] = -1; | |
9253 | else if (code[2] < 32) | |
9254 | code[2] = -1; | |
5f5c8ee5 GM |
9255 | |
9256 | /* Here, the possible range of code[0] (== charset ID) is | |
9257 | 128..max_charset. Since the top level char table contains data | |
9258 | for multibyte characters after 256th element, we must increment | |
9259 | code[0] by 128 to get a correct index. */ | |
9260 | code[0] += 128; | |
9261 | code[3] = -1; /* anchor */ | |
9262 | ||
9263 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
9264 | { | |
9265 | val = dp->contents[code[i]]; | |
9266 | if (!SUB_CHAR_TABLE_P (val)) | |
9267 | return (NILP (val) ? dp->defalt : val); | |
9268 | } | |
9269 | ||
9270 | /* Here, val is a sub char table. We return the default value of | |
9271 | it. */ | |
9272 | return (dp->defalt); | |
9273 | } | |
9274 | ||
9275 | ||
a2889657 | 9276 | \f |
5f5c8ee5 GM |
9277 | /*********************************************************************** |
9278 | Window Redisplay | |
9279 | ***********************************************************************/ | |
a2725ab2 | 9280 | |
5f5c8ee5 | 9281 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
9282 | |
9283 | static void | |
5f5c8ee5 GM |
9284 | redisplay_windows (window) |
9285 | Lisp_Object window; | |
90adcf20 | 9286 | { |
5f5c8ee5 GM |
9287 | while (!NILP (window)) |
9288 | { | |
9289 | struct window *w = XWINDOW (window); | |
9290 | ||
9291 | if (!NILP (w->hchild)) | |
9292 | redisplay_windows (w->hchild); | |
9293 | else if (!NILP (w->vchild)) | |
9294 | redisplay_windows (w->vchild); | |
9295 | else | |
82a7ab23 RS |
9296 | { |
9297 | displayed_buffer = XBUFFER (w->buffer); | |
9298 | internal_condition_case_1 (redisplay_window_0, window, Qerror, | |
9299 | redisplay_window_error); | |
9300 | } | |
a2725ab2 | 9301 | |
5f5c8ee5 GM |
9302 | window = w->next; |
9303 | } | |
9304 | } | |
9305 | ||
82a7ab23 RS |
9306 | static Lisp_Object |
9307 | redisplay_window_error () | |
9308 | { | |
9309 | displayed_buffer->display_error_modiff = BUF_MODIFF (displayed_buffer); | |
9310 | return Qnil; | |
9311 | } | |
9312 | ||
9313 | static Lisp_Object | |
9314 | redisplay_window_0 (window) | |
9315 | Lisp_Object window; | |
9316 | { | |
9317 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9318 | redisplay_window (window, 0); | |
9319 | return Qnil; | |
9320 | } | |
5f5c8ee5 | 9321 | |
82a7ab23 RS |
9322 | static Lisp_Object |
9323 | redisplay_window_1 (window) | |
9324 | Lisp_Object window; | |
9325 | { | |
9326 | if (displayed_buffer->display_error_modiff < BUF_MODIFF (displayed_buffer)) | |
9327 | redisplay_window (window, 1); | |
9328 | return Qnil; | |
9329 | } | |
9330 | \f | |
5f5c8ee5 GM |
9331 | /* Set cursor position of W. PT is assumed to be displayed in ROW. |
9332 | DELTA is the number of bytes by which positions recorded in ROW | |
9333 | differ from current buffer positions. */ | |
9334 | ||
9335 | void | |
9336 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
9337 | struct window *w; | |
9338 | struct glyph_row *row; | |
9339 | struct glyph_matrix *matrix; | |
9340 | int delta, delta_bytes, dy, dvpos; | |
9341 | { | |
9342 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
9343 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
9344 | int x = row->x; | |
9345 | int pt_old = PT - delta; | |
9346 | ||
9347 | /* Skip over glyphs not having an object at the start of the row. | |
9348 | These are special glyphs like truncation marks on terminal | |
9349 | frames. */ | |
9350 | if (row->displays_text_p) | |
9351 | while (glyph < end | |
6fc556fd | 9352 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
9353 | && glyph->charpos < 0) |
9354 | { | |
9355 | x += glyph->pixel_width; | |
9356 | ++glyph; | |
9357 | } | |
9358 | ||
9359 | while (glyph < end | |
6fc556fd | 9360 | && !INTEGERP (glyph->object) |
5f5c8ee5 GM |
9361 | && (!BUFFERP (glyph->object) |
9362 | || glyph->charpos < pt_old)) | |
9363 | { | |
9364 | x += glyph->pixel_width; | |
9365 | ++glyph; | |
9366 | } | |
9367 | ||
9368 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
9369 | w->cursor.x = x; | |
9370 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
9371 | w->cursor.y = row->y + dy; | |
9372 | ||
9373 | if (w == XWINDOW (selected_window)) | |
9374 | { | |
9375 | if (!row->continued_p | |
9376 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
9377 | && row->x == 0) | |
9378 | { | |
9379 | this_line_buffer = XBUFFER (w->buffer); | |
9380 | ||
9381 | CHARPOS (this_line_start_pos) | |
9382 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9383 | BYTEPOS (this_line_start_pos) | |
9384 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
9385 | ||
9386 | CHARPOS (this_line_end_pos) | |
9387 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
9388 | BYTEPOS (this_line_end_pos) | |
9389 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
9390 | ||
9391 | this_line_y = w->cursor.y; | |
9392 | this_line_pixel_height = row->height; | |
9393 | this_line_vpos = w->cursor.vpos; | |
9394 | this_line_start_x = row->x; | |
9395 | } | |
9396 | else | |
9397 | CHARPOS (this_line_start_pos) = 0; | |
9398 | } | |
9399 | } | |
9400 | ||
9401 | ||
9402 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
9403 | start STARTP. Sets the window start of WINDOW to that position. |
9404 | ||
9405 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
9406 | |
9407 | static INLINE struct text_pos | |
9408 | run_window_scroll_functions (window, startp) | |
9409 | Lisp_Object window; | |
9410 | struct text_pos startp; | |
9411 | { | |
9412 | struct window *w = XWINDOW (window); | |
9413 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
9414 | |
9415 | if (current_buffer != XBUFFER (w->buffer)) | |
9416 | abort (); | |
9417 | ||
5f5c8ee5 GM |
9418 | if (!NILP (Vwindow_scroll_functions)) |
9419 | { | |
9420 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
9421 | make_number (CHARPOS (startp))); | |
9422 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
9423 | /* In case the hook functions switch buffers. */ |
9424 | if (current_buffer != XBUFFER (w->buffer)) | |
9425 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 9426 | } |
90adcf20 | 9427 | |
5f5c8ee5 GM |
9428 | return startp; |
9429 | } | |
9430 | ||
9431 | ||
9432 | /* Modify the desired matrix of window W and W->vscroll so that the | |
cb617e7c GM |
9433 | line containing the cursor is fully visible. If this requires |
9434 | larger matrices than are allocated, set fonts_changed_p and return | |
9435 | 0. */ | |
5f5c8ee5 | 9436 | |
cb617e7c | 9437 | static int |
5f5c8ee5 GM |
9438 | make_cursor_line_fully_visible (w) |
9439 | struct window *w; | |
9440 | { | |
9441 | struct glyph_matrix *matrix; | |
9442 | struct glyph_row *row; | |
478d746b | 9443 | int window_height; |
5f5c8ee5 GM |
9444 | |
9445 | /* It's not always possible to find the cursor, e.g, when a window | |
9446 | is full of overlay strings. Don't do anything in that case. */ | |
9447 | if (w->cursor.vpos < 0) | |
cb617e7c | 9448 | return 1; |
5f5c8ee5 GM |
9449 | |
9450 | matrix = w->desired_matrix; | |
9451 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
9452 | ||
b28cb6ed GM |
9453 | /* If the cursor row is not partially visible, there's nothing |
9454 | to do. */ | |
9455 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
cb617e7c | 9456 | return 1; |
b28cb6ed GM |
9457 | |
9458 | /* If the row the cursor is in is taller than the window's height, | |
9459 | it's not clear what to do, so do nothing. */ | |
9460 | window_height = window_box_height (w); | |
9461 | if (row->height >= window_height) | |
cb617e7c | 9462 | return 1; |
b28cb6ed GM |
9463 | |
9464 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
5f5c8ee5 GM |
9465 | { |
9466 | int dy = row->height - row->visible_height; | |
9467 | w->vscroll = 0; | |
9468 | w->cursor.y += dy; | |
9469 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9470 | } | |
b28cb6ed | 9471 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
9472 | { |
9473 | int dy = - (row->height - row->visible_height); | |
9474 | w->vscroll = dy; | |
9475 | w->cursor.y += dy; | |
9476 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9477 | } | |
b28cb6ed | 9478 | |
5f5c8ee5 GM |
9479 | /* When we change the cursor y-position of the selected window, |
9480 | change this_line_y as well so that the display optimization for | |
9481 | the cursor line of the selected window in redisplay_internal uses | |
9482 | the correct y-position. */ | |
9483 | if (w == XWINDOW (selected_window)) | |
9484 | this_line_y = w->cursor.y; | |
cb617e7c GM |
9485 | |
9486 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
9487 | redisplay with larger matrices. */ | |
9488 | if (matrix->nrows < required_matrix_height (w)) | |
9489 | { | |
9490 | fonts_changed_p = 1; | |
9491 | return 0; | |
9492 | } | |
9493 | ||
9494 | return 1; | |
5f5c8ee5 GM |
9495 | } |
9496 | ||
9497 | ||
9498 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
9499 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
9500 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
9501 | in redisplay_window to bring a partially visible line into view in | |
9502 | the case that only the cursor has moved. | |
9503 | ||
9504 | Value is | |
9505 | ||
9506 | 1 if scrolling succeeded | |
9507 | ||
9508 | 0 if scrolling didn't find point. | |
9509 | ||
9510 | -1 if new fonts have been loaded so that we must interrupt | |
9511 | redisplay, adjust glyph matrices, and try again. */ | |
9512 | ||
cb617e7c GM |
9513 | enum |
9514 | { | |
9515 | SCROLLING_SUCCESS, | |
9516 | SCROLLING_FAILED, | |
9517 | SCROLLING_NEED_LARGER_MATRICES | |
9518 | }; | |
9519 | ||
5f5c8ee5 GM |
9520 | static int |
9521 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
9522 | scroll_step, temp_scroll_step) | |
9523 | Lisp_Object window; | |
9524 | int just_this_one_p; | |
31ade731 | 9525 | EMACS_INT scroll_conservatively, scroll_step; |
5f5c8ee5 GM |
9526 | int temp_scroll_step; |
9527 | { | |
9528 | struct window *w = XWINDOW (window); | |
9529 | struct frame *f = XFRAME (w->frame); | |
9530 | struct text_pos scroll_margin_pos; | |
9531 | struct text_pos pos; | |
9532 | struct text_pos startp; | |
9533 | struct it it; | |
9534 | Lisp_Object window_end; | |
9535 | int this_scroll_margin; | |
9536 | int dy = 0; | |
9537 | int scroll_max; | |
b8a63ccb | 9538 | int rc; |
5f5c8ee5 GM |
9539 | int amount_to_scroll = 0; |
9540 | Lisp_Object aggressive; | |
9541 | int height; | |
9542 | ||
9543 | #if GLYPH_DEBUG | |
9544 | debug_method_add (w, "try_scrolling"); | |
78614721 | 9545 | #endif |
5f5c8ee5 GM |
9546 | |
9547 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
9548 | ||
9549 | /* Compute scroll margin height in pixels. We scroll when point is | |
9550 | within this distance from the top or bottom of the window. */ | |
9551 | if (scroll_margin > 0) | |
90adcf20 | 9552 | { |
5f5c8ee5 GM |
9553 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
9554 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9555 | } | |
9556 | else | |
9557 | this_scroll_margin = 0; | |
9558 | ||
9559 | /* Compute how much we should try to scroll maximally to bring point | |
9560 | into view. */ | |
0894e696 SM |
9561 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
9562 | scroll_max = max (scroll_step, | |
9563 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
9564 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
9565 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
9566 | /* We're trying to scroll because of aggressive scrolling | |
9567 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
9568 | there should be a variable for this. */ | |
9569 | scroll_max = 10; | |
9570 | else | |
9571 | scroll_max = 0; | |
9572 | scroll_max *= CANON_Y_UNIT (f); | |
9573 | ||
9574 | /* Decide whether we have to scroll down. Start at the window end | |
9575 | and move this_scroll_margin up to find the position of the scroll | |
9576 | margin. */ | |
9577 | window_end = Fwindow_end (window, Qt); | |
9578 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
9579 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
9580 | if (this_scroll_margin) | |
9581 | { | |
9582 | start_display (&it, w, scroll_margin_pos); | |
9583 | move_it_vertically (&it, - this_scroll_margin); | |
9584 | scroll_margin_pos = it.current.pos; | |
9585 | } | |
9586 | ||
9587 | if (PT >= CHARPOS (scroll_margin_pos)) | |
9588 | { | |
9589 | int y0; | |
9590 | ||
9591 | /* Point is in the scroll margin at the bottom of the window, or | |
9592 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 9593 | |
5f5c8ee5 GM |
9594 | /* Compute the distance from the scroll margin to PT. |
9595 | Give up if the distance is greater than scroll_max. */ | |
9596 | start_display (&it, w, scroll_margin_pos); | |
9597 | y0 = it.current_y; | |
9598 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
9599 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
539e92ad GM |
9600 | |
9601 | /* To make point visible, we have to move the window start | |
9602 | down so that the line the cursor is in is visible, which | |
9603 | means we have to add in the height of the cursor line. */ | |
9604 | dy = line_bottom_y (&it) - y0; | |
47589c8c | 9605 | |
5f5c8ee5 | 9606 | if (dy > scroll_max) |
cb617e7c | 9607 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9608 | |
9609 | /* Move the window start down. If scrolling conservatively, | |
9610 | move it just enough down to make point visible. If | |
9611 | scroll_step is set, move it down by scroll_step. */ | |
9612 | start_display (&it, w, startp); | |
9613 | ||
9614 | if (scroll_conservatively) | |
e89aaabd GM |
9615 | amount_to_scroll |
9616 | = max (max (dy, CANON_Y_UNIT (f)), | |
9617 | CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9618 | else if (scroll_step || temp_scroll_step) |
9619 | amount_to_scroll = scroll_max; | |
9620 | else | |
90adcf20 | 9621 | { |
46226c1d | 9622 | aggressive = current_buffer->scroll_up_aggressively; |
5f5c8ee5 | 9623 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 9624 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9625 | if (NUMBERP (aggressive)) |
9626 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9627 | } | |
a2725ab2 | 9628 | |
5f5c8ee5 | 9629 | if (amount_to_scroll <= 0) |
cb617e7c | 9630 | return SCROLLING_FAILED; |
a2725ab2 | 9631 | |
5f5c8ee5 GM |
9632 | move_it_vertically (&it, amount_to_scroll); |
9633 | startp = it.current.pos; | |
9634 | } | |
9635 | else | |
9636 | { | |
9637 | /* See if point is inside the scroll margin at the top of the | |
9638 | window. */ | |
9639 | scroll_margin_pos = startp; | |
9640 | if (this_scroll_margin) | |
9641 | { | |
9642 | start_display (&it, w, startp); | |
9643 | move_it_vertically (&it, this_scroll_margin); | |
9644 | scroll_margin_pos = it.current.pos; | |
9645 | } | |
9646 | ||
9647 | if (PT < CHARPOS (scroll_margin_pos)) | |
9648 | { | |
9649 | /* Point is in the scroll margin at the top of the window or | |
9650 | above what is displayed in the window. */ | |
9651 | int y0; | |
9652 | ||
9653 | /* Compute the vertical distance from PT to the scroll | |
9654 | margin position. Give up if distance is greater than | |
9655 | scroll_max. */ | |
9656 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
9657 | start_display (&it, w, pos); | |
9658 | y0 = it.current_y; | |
9659 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
9660 | it.last_visible_y, -1, | |
9661 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
9662 | dy = it.current_y - y0; | |
9663 | if (dy > scroll_max) | |
cb617e7c | 9664 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9665 | |
9666 | /* Compute new window start. */ | |
9667 | start_display (&it, w, startp); | |
9668 | ||
9669 | if (scroll_conservatively) | |
0894e696 SM |
9670 | amount_to_scroll = |
9671 | max (dy, CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9672 | else if (scroll_step || temp_scroll_step) |
9673 | amount_to_scroll = scroll_max; | |
538f13d4 | 9674 | else |
5f5c8ee5 | 9675 | { |
46226c1d | 9676 | aggressive = current_buffer->scroll_down_aggressively; |
5f5c8ee5 | 9677 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) |
045dee35 | 9678 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9679 | if (NUMBERP (aggressive)) |
9680 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9681 | } | |
a2725ab2 | 9682 | |
5f5c8ee5 | 9683 | if (amount_to_scroll <= 0) |
cb617e7c | 9684 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9685 | |
9686 | move_it_vertically (&it, - amount_to_scroll); | |
9687 | startp = it.current.pos; | |
90adcf20 RS |
9688 | } |
9689 | } | |
a2889657 | 9690 | |
5f5c8ee5 GM |
9691 | /* Run window scroll functions. */ |
9692 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 9693 | |
5f5c8ee5 GM |
9694 | /* Display the window. Give up if new fonts are loaded, or if point |
9695 | doesn't appear. */ | |
9696 | if (!try_window (window, startp)) | |
cb617e7c | 9697 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
9698 | else if (w->cursor.vpos < 0) |
9699 | { | |
9700 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 9701 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
9702 | } |
9703 | else | |
9704 | { | |
9705 | /* Maybe forget recorded base line for line number display. */ | |
9706 | if (!just_this_one_p | |
9707 | || current_buffer->clip_changed | |
9142dd5b | 9708 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
9709 | w->base_line_number = Qnil; |
9710 | ||
9711 | /* If cursor ends up on a partially visible line, shift display | |
cb617e7c GM |
9712 | lines up or down. If that fails because we need larger |
9713 | matrices, give up. */ | |
9714 | if (!make_cursor_line_fully_visible (w)) | |
9715 | rc = SCROLLING_NEED_LARGER_MATRICES; | |
9716 | else | |
9717 | rc = SCROLLING_SUCCESS; | |
5f5c8ee5 GM |
9718 | } |
9719 | ||
9720 | return rc; | |
a2889657 JB |
9721 | } |
9722 | ||
5f5c8ee5 GM |
9723 | |
9724 | /* Compute a suitable window start for window W if display of W starts | |
9725 | on a continuation line. Value is non-zero if a new window start | |
9726 | was computed. | |
9727 | ||
9728 | The new window start will be computed, based on W's width, starting | |
9729 | from the start of the continued line. It is the start of the | |
9730 | screen line with the minimum distance from the old start W->start. */ | |
9731 | ||
9732 | static int | |
9733 | compute_window_start_on_continuation_line (w) | |
9734 | struct window *w; | |
1f1ff51d | 9735 | { |
5f5c8ee5 GM |
9736 | struct text_pos pos, start_pos; |
9737 | int window_start_changed_p = 0; | |
1f1ff51d | 9738 | |
5f5c8ee5 | 9739 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 9740 | |
5f5c8ee5 GM |
9741 | /* If window start is on a continuation line... Window start may be |
9742 | < BEGV in case there's invisible text at the start of the | |
9743 | buffer (M-x rmail, for example). */ | |
9744 | if (CHARPOS (start_pos) > BEGV | |
9745 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 9746 | { |
5f5c8ee5 GM |
9747 | struct it it; |
9748 | struct glyph_row *row; | |
f3751a65 GM |
9749 | |
9750 | /* Handle the case that the window start is out of range. */ | |
9751 | if (CHARPOS (start_pos) < BEGV) | |
9752 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
9753 | else if (CHARPOS (start_pos) > ZV) | |
9754 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
9755 | |
9756 | /* Find the start of the continued line. This should be fast | |
9757 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 9758 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
9759 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
9760 | row, DEFAULT_FACE_ID); | |
9761 | reseat_at_previous_visible_line_start (&it); | |
9762 | ||
9763 | /* If the line start is "too far" away from the window start, | |
9764 | say it takes too much time to compute a new window start. */ | |
9765 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
9766 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
9767 | { | |
9768 | int min_distance, distance; | |
9769 | ||
9770 | /* Move forward by display lines to find the new window | |
9771 | start. If window width was enlarged, the new start can | |
9772 | be expected to be > the old start. If window width was | |
9773 | decreased, the new window start will be < the old start. | |
9774 | So, we're looking for the display line start with the | |
9775 | minimum distance from the old window start. */ | |
9776 | pos = it.current.pos; | |
9777 | min_distance = INFINITY; | |
9778 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
9779 | distance < min_distance) | |
9780 | { | |
9781 | min_distance = distance; | |
9782 | pos = it.current.pos; | |
9783 | move_it_by_lines (&it, 1, 0); | |
9784 | } | |
9785 | ||
9786 | /* Set the window start there. */ | |
9787 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
9788 | window_start_changed_p = 1; | |
9789 | } | |
1f1ff51d | 9790 | } |
5f5c8ee5 GM |
9791 | |
9792 | return window_start_changed_p; | |
1f1ff51d KH |
9793 | } |
9794 | ||
5f5c8ee5 | 9795 | |
47589c8c GM |
9796 | /* Try cursor movement in case text has not changes in window WINDOW, |
9797 | with window start STARTP. Value is | |
9798 | ||
cb617e7c | 9799 | CURSOR_MOVEMENT_SUCCESS if successful |
47589c8c | 9800 | |
cb617e7c GM |
9801 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
9802 | ||
9803 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
9804 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
9805 | we want to scroll as if scroll-step were set to 1. See the code. | |
9806 | ||
9807 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
9808 | which case we have to abort this redisplay, and adjust matrices | |
9809 | first. */ | |
9810 | ||
9811 | enum | |
9812 | { | |
9813 | CURSOR_MOVEMENT_SUCCESS, | |
9814 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
9815 | CURSOR_MOVEMENT_MUST_SCROLL, | |
9816 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
9817 | }; | |
47589c8c GM |
9818 | |
9819 | static int | |
9820 | try_cursor_movement (window, startp, scroll_step) | |
9821 | Lisp_Object window; | |
9822 | struct text_pos startp; | |
9823 | int *scroll_step; | |
9824 | { | |
9825 | struct window *w = XWINDOW (window); | |
9826 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 9827 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
47589c8c | 9828 | |
69d1f7c9 | 9829 | #if GLYPH_DEBUG |
76cb5e06 GM |
9830 | if (inhibit_try_cursor_movement) |
9831 | return rc; | |
9832 | #endif | |
9833 | ||
47589c8c GM |
9834 | /* Handle case where text has not changed, only point, and it has |
9835 | not moved off the frame. */ | |
9836 | if (/* Point may be in this window. */ | |
9837 | PT >= CHARPOS (startp) | |
47589c8c GM |
9838 | /* Selective display hasn't changed. */ |
9839 | && !current_buffer->clip_changed | |
4db87380 GM |
9840 | /* Function force-mode-line-update is used to force a thorough |
9841 | redisplay. It sets either windows_or_buffers_changed or | |
9842 | update_mode_lines. So don't take a shortcut here for these | |
9843 | cases. */ | |
9844 | && !update_mode_lines | |
9845 | && !windows_or_buffers_changed | |
47589c8c GM |
9846 | /* Can't use this case if highlighting a region. When a |
9847 | region exists, cursor movement has to do more than just | |
9848 | set the cursor. */ | |
9849 | && !(!NILP (Vtransient_mark_mode) | |
9850 | && !NILP (current_buffer->mark_active)) | |
9851 | && NILP (w->region_showing) | |
9852 | && NILP (Vshow_trailing_whitespace) | |
9853 | /* Right after splitting windows, last_point may be nil. */ | |
9854 | && INTEGERP (w->last_point) | |
9855 | /* This code is not used for mini-buffer for the sake of the case | |
9856 | of redisplaying to replace an echo area message; since in | |
9857 | that case the mini-buffer contents per se are usually | |
9858 | unchanged. This code is of no real use in the mini-buffer | |
9859 | since the handling of this_line_start_pos, etc., in redisplay | |
9860 | handles the same cases. */ | |
9861 | && !EQ (window, minibuf_window) | |
9862 | /* When splitting windows or for new windows, it happens that | |
9863 | redisplay is called with a nil window_end_vpos or one being | |
9864 | larger than the window. This should really be fixed in | |
9865 | window.c. I don't have this on my list, now, so we do | |
9866 | approximately the same as the old redisplay code. --gerd. */ | |
9867 | && INTEGERP (w->window_end_vpos) | |
9868 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
9869 | && (FRAME_WINDOW_P (f) | |
9870 | || !MARKERP (Voverlay_arrow_position) | |
9871 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
9872 | { | |
9873 | int this_scroll_margin; | |
8ee5b6a3 | 9874 | struct glyph_row *row = NULL; |
47589c8c GM |
9875 | |
9876 | #if GLYPH_DEBUG | |
9877 | debug_method_add (w, "cursor movement"); | |
9878 | #endif | |
9879 | ||
9880 | /* Scroll if point within this distance from the top or bottom | |
9881 | of the window. This is a pixel value. */ | |
9882 | this_scroll_margin = max (0, scroll_margin); | |
9883 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
9884 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9885 | ||
9886 | /* Start with the row the cursor was displayed during the last | |
9887 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
9888 | if (w->last_cursor.vpos < 0 |
9889 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 9890 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9891 | else |
9892 | { | |
9893 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
9894 | if (row->mode_line_p) | |
9895 | ++row; | |
9896 | if (!row->enabled_p) | |
cb617e7c | 9897 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9898 | } |
9899 | ||
cb617e7c | 9900 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
9901 | { |
9902 | int scroll_p = 0; | |
68c5d1db GM |
9903 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
9904 | ||
47589c8c GM |
9905 | if (PT > XFASTINT (w->last_point)) |
9906 | { | |
9907 | /* Point has moved forward. */ | |
47589c8c GM |
9908 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
9909 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
9910 | { | |
9911 | xassert (row->enabled_p); | |
9912 | ++row; | |
9913 | } | |
9914 | ||
9915 | /* The end position of a row equals the start position | |
9916 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
9917 | display it in the next line. */ |
9918 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
9919 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
9920 | && !cursor_row_p (w, row)) | |
9921 | ++row; | |
47589c8c GM |
9922 | |
9923 | /* If within the scroll margin, scroll. Note that | |
9924 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
9925 | the next line would be drawn, and that | |
9926 | this_scroll_margin can be zero. */ | |
9927 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
9928 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
9929 | /* Line is completely visible last line in window | |
9930 | and PT is to be set in the next line. */ | |
9931 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
9932 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
9933 | && !row->ends_at_zv_p | |
9934 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
9935 | scroll_p = 1; | |
9936 | } | |
9937 | else if (PT < XFASTINT (w->last_point)) | |
9938 | { | |
9939 | /* Cursor has to be moved backward. Note that PT >= | |
9940 | CHARPOS (startp) because of the outer | |
9941 | if-statement. */ | |
9942 | while (!row->mode_line_p | |
9943 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
9944 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
9945 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
9946 | && (row->y > this_scroll_margin | |
9947 | || CHARPOS (startp) == BEGV)) | |
9948 | { | |
9949 | xassert (row->enabled_p); | |
9950 | --row; | |
9951 | } | |
9952 | ||
9953 | /* Consider the following case: Window starts at BEGV, | |
9954 | there is invisible, intangible text at BEGV, so that | |
9955 | display starts at some point START > BEGV. It can | |
9956 | happen that we are called with PT somewhere between | |
9957 | BEGV and START. Try to handle that case. */ | |
9958 | if (row < w->current_matrix->rows | |
9959 | || row->mode_line_p) | |
9960 | { | |
9961 | row = w->current_matrix->rows; | |
9962 | if (row->mode_line_p) | |
9963 | ++row; | |
9964 | } | |
9965 | ||
9966 | /* Due to newlines in overlay strings, we may have to | |
9967 | skip forward over overlay strings. */ | |
68c5d1db GM |
9968 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
9969 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
9970 | && !cursor_row_p (w, row)) | |
47589c8c GM |
9971 | ++row; |
9972 | ||
9973 | /* If within the scroll margin, scroll. */ | |
9974 | if (row->y < this_scroll_margin | |
9975 | && CHARPOS (startp) != BEGV) | |
9976 | scroll_p = 1; | |
9977 | } | |
9978 | ||
9979 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
9980 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
9981 | { | |
9982 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 9983 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 9984 | } |
440fc135 | 9985 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c | 9986 | { |
8de4aaf8 GM |
9987 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
9988 | && !row->ends_at_zv_p | |
9989 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 9990 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 9991 | else if (row->height > window_box_height (w)) |
440fc135 | 9992 | { |
8de4aaf8 GM |
9993 | /* If we end up in a partially visible line, let's |
9994 | make it fully visible, except when it's taller | |
9995 | than the window, in which case we can't do much | |
9996 | about it. */ | |
440fc135 | 9997 | *scroll_step = 1; |
cb617e7c | 9998 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
9999 | } |
10000 | else | |
10001 | { | |
10002 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
10003 | try_window (window, startp); | |
cb617e7c GM |
10004 | if (!make_cursor_line_fully_visible (w)) |
10005 | rc = CURSOR_MOVEMENT_NEED_LARGER_MATRICES; | |
10006 | else | |
10007 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 10008 | } |
47589c8c GM |
10009 | } |
10010 | else if (scroll_p) | |
cb617e7c | 10011 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
10012 | else |
10013 | { | |
10014 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 10015 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
10016 | } |
10017 | } | |
10018 | } | |
10019 | ||
10020 | return rc; | |
10021 | } | |
10022 | ||
10023 | ||
5f5c8ee5 GM |
10024 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
10025 | selected_window is redisplayed. */ | |
90adcf20 | 10026 | |
a2889657 | 10027 | static void |
5f5c8ee5 | 10028 | redisplay_window (window, just_this_one_p) |
a2889657 | 10029 | Lisp_Object window; |
5f5c8ee5 | 10030 | int just_this_one_p; |
a2889657 | 10031 | { |
5f5c8ee5 GM |
10032 | struct window *w = XWINDOW (window); |
10033 | struct frame *f = XFRAME (w->frame); | |
10034 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 10035 | struct buffer *old = current_buffer; |
5f5c8ee5 | 10036 | struct text_pos lpoint, opoint, startp; |
e481f960 | 10037 | int update_mode_line; |
5f5c8ee5 GM |
10038 | int tem; |
10039 | struct it it; | |
10040 | /* Record it now because it's overwritten. */ | |
10041 | int current_matrix_up_to_date_p = 0; | |
5f5c8ee5 | 10042 | int temp_scroll_step = 0; |
2d27dae2 | 10043 | int count = BINDING_STACK_SIZE (); |
47589c8c | 10044 | int rc; |
a2889657 | 10045 | |
5f5c8ee5 GM |
10046 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
10047 | opoint = lpoint; | |
a2889657 | 10048 | |
5f5c8ee5 GM |
10049 | /* W must be a leaf window here. */ |
10050 | xassert (!NILP (w->buffer)); | |
10051 | #if GLYPH_DEBUG | |
10052 | *w->desired_matrix->method = 0; | |
10053 | #endif | |
2e54982e RS |
10054 | |
10055 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
10056 | |
10057 | reconsider_clip_changes (w, buffer); | |
10058 | ||
5f5c8ee5 GM |
10059 | /* Has the mode line to be updated? */ |
10060 | update_mode_line = (!NILP (w->update_mode_line) | |
10061 | || update_mode_lines | |
10062 | || buffer->clip_changed); | |
8de2d90b JB |
10063 | |
10064 | if (MINI_WINDOW_P (w)) | |
10065 | { | |
5f5c8ee5 | 10066 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 10067 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
10068 | { |
10069 | if (update_mode_line) | |
10070 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 10071 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
10072 | goto finish_menu_bars; |
10073 | else | |
10074 | /* We've already displayed the echo area glyphs in this window. */ | |
10075 | goto finish_scroll_bars; | |
10076 | } | |
73af359d | 10077 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 10078 | { |
5f5c8ee5 GM |
10079 | /* W is a mini-buffer window, but it's not the currently |
10080 | active one, so clear it. */ | |
10081 | int yb = window_text_bottom_y (w); | |
10082 | struct glyph_row *row; | |
10083 | int y; | |
10084 | ||
10085 | for (y = 0, row = w->desired_matrix->rows; | |
10086 | y < yb; | |
10087 | y += row->height, ++row) | |
10088 | blank_row (w, row, y); | |
88f22aff | 10089 | goto finish_scroll_bars; |
8de2d90b | 10090 | } |
c095a1dd GM |
10091 | |
10092 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 10093 | } |
a2889657 | 10094 | |
5f5c8ee5 GM |
10095 | /* Otherwise set up data on this window; select its buffer and point |
10096 | value. */ | |
6a93695f GM |
10097 | /* Really select the buffer, for the sake of buffer-local |
10098 | variables. */ | |
10099 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
10100 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
10101 | ||
10102 | current_matrix_up_to_date_p | |
10103 | = (!NILP (w->window_end_valid) | |
10104 | && !current_buffer->clip_changed | |
10105 | && XFASTINT (w->last_modified) >= MODIFF | |
10106 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 10107 | |
5f5c8ee5 GM |
10108 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
10109 | the window end being valid, so set it to nil there. */ | |
10110 | if (windows_or_buffers_changed) | |
10111 | { | |
10112 | /* If window starts on a continuation line, maybe adjust the | |
10113 | window start in case the window's width changed. */ | |
10114 | if (XMARKER (w->start)->buffer == current_buffer) | |
10115 | compute_window_start_on_continuation_line (w); | |
10116 | ||
10117 | w->window_end_valid = Qnil; | |
10118 | } | |
12adba34 | 10119 | |
5f5c8ee5 GM |
10120 | /* Some sanity checks. */ |
10121 | CHECK_WINDOW_END (w); | |
10122 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 10123 | abort (); |
5f5c8ee5 | 10124 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 10125 | abort (); |
a2889657 | 10126 | |
28995e67 RS |
10127 | /* If %c is in mode line, update it if needed. */ |
10128 | if (!NILP (w->column_number_displayed) | |
10129 | /* This alternative quickly identifies a common case | |
10130 | where no change is needed. */ | |
10131 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
10132 | && XFASTINT (w->last_modified) >= MODIFF |
10133 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
10134 | && XFASTINT (w->column_number_displayed) != current_column ()) |
10135 | update_mode_line = 1; | |
10136 | ||
5f5c8ee5 GM |
10137 | /* Count number of windows showing the selected buffer. An indirect |
10138 | buffer counts as its base buffer. */ | |
10139 | if (!just_this_one_p) | |
42640f83 RS |
10140 | { |
10141 | struct buffer *current_base, *window_base; | |
10142 | current_base = current_buffer; | |
10143 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
10144 | if (current_base->base_buffer) | |
10145 | current_base = current_base->base_buffer; | |
10146 | if (window_base->base_buffer) | |
10147 | window_base = window_base->base_buffer; | |
10148 | if (current_base == window_base) | |
10149 | buffer_shared++; | |
10150 | } | |
a2889657 | 10151 | |
5f5c8ee5 GM |
10152 | /* Point refers normally to the selected window. For any other |
10153 | window, set up appropriate value. */ | |
a2889657 JB |
10154 | if (!EQ (window, selected_window)) |
10155 | { | |
12adba34 RS |
10156 | int new_pt = XMARKER (w->pointm)->charpos; |
10157 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 10158 | if (new_pt < BEGV) |
a2889657 | 10159 | { |
f67a0f51 | 10160 | new_pt = BEGV; |
12adba34 RS |
10161 | new_pt_byte = BEGV_BYTE; |
10162 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 10163 | } |
f67a0f51 | 10164 | else if (new_pt > (ZV - 1)) |
a2889657 | 10165 | { |
f67a0f51 | 10166 | new_pt = ZV; |
12adba34 RS |
10167 | new_pt_byte = ZV_BYTE; |
10168 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 10169 | } |
5f5c8ee5 | 10170 | |
f67a0f51 | 10171 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 10172 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
10173 | } |
10174 | ||
f4faa47c | 10175 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
10176 | have changed, invalidate the width run cache. It's true that |
10177 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
10178 | redisplay goes (non-fatally) haywire when the display table is |
10179 | changed, so why should we worry about doing any better? */ | |
10180 | if (current_buffer->width_run_cache) | |
10181 | { | |
f908610f | 10182 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
10183 | |
10184 | if (! disptab_matches_widthtab (disptab, | |
10185 | XVECTOR (current_buffer->width_table))) | |
10186 | { | |
10187 | invalidate_region_cache (current_buffer, | |
10188 | current_buffer->width_run_cache, | |
10189 | BEG, Z); | |
10190 | recompute_width_table (current_buffer, disptab); | |
10191 | } | |
10192 | } | |
10193 | ||
a2889657 | 10194 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
10195 | if (XMARKER (w->start)->buffer != current_buffer) |
10196 | goto recenter; | |
10197 | ||
5f5c8ee5 | 10198 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 10199 | |
cf0df6ab RS |
10200 | /* If someone specified a new starting point but did not insist, |
10201 | check whether it can be used. */ | |
cfad01b4 GM |
10202 | if (!NILP (w->optional_new_start) |
10203 | && CHARPOS (startp) >= BEGV | |
10204 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
10205 | { |
10206 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
10207 | start_display (&it, w, startp); |
10208 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10209 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10210 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
10211 | w->force_start = Qt; |
10212 | } | |
10213 | ||
8de2d90b | 10214 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 10215 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
10216 | if (!NILP (w->force_start) |
10217 | || w->frozen_window_start_p) | |
a2889657 | 10218 | { |
e63574d7 | 10219 | w->force_start = Qnil; |
5f5c8ee5 | 10220 | w->vscroll = 0; |
b5174a51 | 10221 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
10222 | |
10223 | /* Forget any recorded base line for line number display. */ | |
10224 | if (!current_matrix_up_to_date_p | |
10225 | || current_buffer->clip_changed) | |
10226 | w->base_line_number = Qnil; | |
10227 | ||
75c43375 RS |
10228 | /* Redisplay the mode line. Select the buffer properly for that. |
10229 | Also, run the hook window-scroll-functions | |
10230 | because we have scrolled. */ | |
e63574d7 RS |
10231 | /* Note, we do this after clearing force_start because |
10232 | if there's an error, it is better to forget about force_start | |
10233 | than to get into an infinite loop calling the hook functions | |
10234 | and having them get more errors. */ | |
75c43375 RS |
10235 | if (!update_mode_line |
10236 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 10237 | { |
e481f960 RS |
10238 | update_mode_line = 1; |
10239 | w->update_mode_line = Qt; | |
5f5c8ee5 | 10240 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 10241 | } |
5f5c8ee5 | 10242 | |
ac90c44f GM |
10243 | w->last_modified = make_number (0); |
10244 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
10245 | if (CHARPOS (startp) < BEGV) |
10246 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
10247 | else if (CHARPOS (startp) > ZV) | |
10248 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
10249 | ||
10250 | /* Redisplay, then check if cursor has been set during the | |
10251 | redisplay. Give up if new fonts were loaded. */ | |
10252 | if (!try_window (window, startp)) | |
10253 | { | |
10254 | w->force_start = Qt; | |
10255 | clear_glyph_matrix (w->desired_matrix); | |
504454e8 | 10256 | goto finish_scroll_bars; |
5f5c8ee5 GM |
10257 | } |
10258 | ||
9472f927 | 10259 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 10260 | { |
b28cb6ed GM |
10261 | /* If point does not appear, try to move point so it does |
10262 | appear. The desired matrix has been built above, so we | |
10263 | can use it here. */ | |
10264 | int window_height; | |
10265 | struct glyph_row *row; | |
10266 | ||
10267 | window_height = window_box_height (w) / 2; | |
10268 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); | |
10269 | while (MATRIX_ROW_BOTTOM_Y (row) < window_height) | |
5f5c8ee5 GM |
10270 | ++row; |
10271 | ||
10272 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
10273 | MATRIX_ROW_START_BYTEPOS (row)); | |
10274 | ||
90adcf20 | 10275 | if (w != XWINDOW (selected_window)) |
12adba34 | 10276 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
10277 | else if (current_buffer == old) |
10278 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
10279 | ||
10280 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
10281 | ||
10282 | /* If we are highlighting the region, then we just changed | |
10283 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
10284 | if (!NILP (Vtransient_mark_mode) |
10285 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 10286 | { |
5f5c8ee5 GM |
10287 | clear_glyph_matrix (w->desired_matrix); |
10288 | if (!try_window (window, startp)) | |
cb617e7c | 10289 | goto need_larger_matrices; |
6f27fa9b | 10290 | } |
a2889657 | 10291 | } |
5f5c8ee5 | 10292 | |
cb617e7c GM |
10293 | if (!make_cursor_line_fully_visible (w)) |
10294 | goto need_larger_matrices; | |
5f5c8ee5 GM |
10295 | #if GLYPH_DEBUG |
10296 | debug_method_add (w, "forced window start"); | |
10297 | #endif | |
a2889657 JB |
10298 | goto done; |
10299 | } | |
10300 | ||
5f5c8ee5 GM |
10301 | /* Handle case where text has not changed, only point, and it has |
10302 | not moved off the frame. */ | |
10303 | if (current_matrix_up_to_date_p | |
47589c8c | 10304 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 10305 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 10306 | { |
cb617e7c GM |
10307 | switch (rc) |
10308 | { | |
10309 | case CURSOR_MOVEMENT_SUCCESS: | |
10310 | goto done; | |
10311 | ||
10312 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: | |
10313 | goto need_larger_matrices; | |
10314 | ||
10315 | case CURSOR_MOVEMENT_MUST_SCROLL: | |
10316 | goto try_to_scroll; | |
10317 | ||
10318 | default: | |
10319 | abort (); | |
10320 | } | |
a2889657 JB |
10321 | } |
10322 | /* If current starting point was originally the beginning of a line | |
10323 | but no longer is, find a new starting point. */ | |
265a9e55 | 10324 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
10325 | && !(CHARPOS (startp) <= BEGV |
10326 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 10327 | { |
5f5c8ee5 GM |
10328 | #if GLYPH_DEBUG |
10329 | debug_method_add (w, "recenter 1"); | |
10330 | #endif | |
a2889657 JB |
10331 | goto recenter; |
10332 | } | |
5f5c8ee5 | 10333 | |
27d16f05 GM |
10334 | /* Try scrolling with try_window_id. Value is > 0 if update has |
10335 | been done, it is -1 if we know that the same window start will | |
10336 | not work. It is 0 if unsuccessful for some other reason. */ | |
10337 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 10338 | { |
5f5c8ee5 | 10339 | #if GLYPH_DEBUG |
ef121659 | 10340 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
10341 | #endif |
10342 | ||
10343 | if (fonts_changed_p) | |
cb617e7c | 10344 | goto need_larger_matrices; |
a2889657 JB |
10345 | if (tem > 0) |
10346 | goto done; | |
ef121659 | 10347 | |
5f5c8ee5 GM |
10348 | /* Otherwise try_window_id has returned -1 which means that we |
10349 | don't want the alternative below this comment to execute. */ | |
a2889657 | 10350 | } |
5f5c8ee5 GM |
10351 | else if (CHARPOS (startp) >= BEGV |
10352 | && CHARPOS (startp) <= ZV | |
10353 | && PT >= CHARPOS (startp) | |
10354 | && (CHARPOS (startp) < ZV | |
e9874cee | 10355 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 10356 | || CHARPOS (startp) == BEGV |
8850a573 RS |
10357 | || (XFASTINT (w->last_modified) >= MODIFF |
10358 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 10359 | { |
5f5c8ee5 GM |
10360 | #if GLYPH_DEBUG |
10361 | debug_method_add (w, "same window start"); | |
10362 | #endif | |
10363 | ||
10364 | /* Try to redisplay starting at same place as before. | |
10365 | If point has not moved off frame, accept the results. */ | |
10366 | if (!current_matrix_up_to_date_p | |
10367 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
10368 | because a window scroll function can have changed the |
10369 | buffer. */ | |
5f5c8ee5 GM |
10370 | || !NILP (Vwindow_scroll_functions) |
10371 | || MINI_WINDOW_P (w) | |
10372 | || !try_window_reusing_current_matrix (w)) | |
10373 | { | |
10374 | IF_DEBUG (debug_method_add (w, "1")); | |
10375 | try_window (window, startp); | |
10376 | } | |
10377 | ||
10378 | if (fonts_changed_p) | |
cb617e7c | 10379 | goto need_larger_matrices; |
5f5c8ee5 GM |
10380 | |
10381 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 10382 | { |
5f5c8ee5 GM |
10383 | if (!just_this_one_p |
10384 | || current_buffer->clip_changed | |
9142dd5b | 10385 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
10386 | /* Forget any recorded base line for line number display. */ |
10387 | w->base_line_number = Qnil; | |
5f5c8ee5 | 10388 | |
cb617e7c GM |
10389 | if (!make_cursor_line_fully_visible (w)) |
10390 | goto need_larger_matrices; | |
aa6d10fa RS |
10391 | goto done; |
10392 | } | |
a2889657 | 10393 | else |
5f5c8ee5 | 10394 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
10395 | } |
10396 | ||
5f5c8ee5 GM |
10397 | try_to_scroll: |
10398 | ||
ac90c44f GM |
10399 | w->last_modified = make_number (0); |
10400 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 10401 | |
e481f960 RS |
10402 | /* Redisplay the mode line. Select the buffer properly for that. */ |
10403 | if (!update_mode_line) | |
10404 | { | |
e481f960 RS |
10405 | update_mode_line = 1; |
10406 | w->update_mode_line = Qt; | |
10407 | } | |
a2889657 | 10408 | |
5f5c8ee5 GM |
10409 | /* Try to scroll by specified few lines. */ |
10410 | if ((scroll_conservatively | |
10411 | || scroll_step | |
10412 | || temp_scroll_step | |
10413 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
10414 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 10415 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
10416 | && CHARPOS (startp) >= BEGV |
10417 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 10418 | { |
5f5c8ee5 GM |
10419 | /* The function returns -1 if new fonts were loaded, 1 if |
10420 | successful, 0 if not successful. */ | |
10421 | int rc = try_scrolling (window, just_this_one_p, | |
10422 | scroll_conservatively, | |
10423 | scroll_step, | |
10424 | temp_scroll_step); | |
cb617e7c GM |
10425 | switch (rc) |
10426 | { | |
10427 | case SCROLLING_SUCCESS: | |
10428 | goto done; | |
10429 | ||
10430 | case SCROLLING_NEED_LARGER_MATRICES: | |
10431 | goto need_larger_matrices; | |
10432 | ||
10433 | case SCROLLING_FAILED: | |
10434 | break; | |
10435 | ||
10436 | default: | |
10437 | abort (); | |
10438 | } | |
5f5c8ee5 | 10439 | } |
f9c8af06 | 10440 | |
5f5c8ee5 | 10441 | /* Finally, just choose place to start which centers point */ |
5936754e | 10442 | |
5f5c8ee5 | 10443 | recenter: |
44173109 | 10444 | |
5f5c8ee5 GM |
10445 | #if GLYPH_DEBUG |
10446 | debug_method_add (w, "recenter"); | |
10447 | #endif | |
0789adb2 | 10448 | |
5f5c8ee5 | 10449 | /* w->vscroll = 0; */ |
0789adb2 | 10450 | |
5f5c8ee5 GM |
10451 | /* Forget any previously recorded base line for line number display. */ |
10452 | if (!current_matrix_up_to_date_p | |
10453 | || current_buffer->clip_changed) | |
10454 | w->base_line_number = Qnil; | |
10455 | ||
10456 | /* Move backward half the height of the window. */ | |
10457 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10458 | it.current_y = it.last_visible_y; | |
3a030013 | 10459 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
5f5c8ee5 GM |
10460 | xassert (IT_CHARPOS (it) >= BEGV); |
10461 | ||
10462 | /* The function move_it_vertically_backward may move over more | |
10463 | than the specified y-distance. If it->w is small, e.g. a | |
10464 | mini-buffer window, we may end up in front of the window's | |
10465 | display area. Start displaying at the start of the line | |
10466 | containing PT in this case. */ | |
10467 | if (it.current_y <= 0) | |
10468 | { | |
10469 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10470 | move_it_vertically (&it, 0); | |
10471 | xassert (IT_CHARPOS (it) <= PT); | |
10472 | it.current_y = 0; | |
0789adb2 RS |
10473 | } |
10474 | ||
5f5c8ee5 GM |
10475 | it.current_x = it.hpos = 0; |
10476 | ||
10477 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
10478 | in case the window-scroll-functions functions get errors. */ | |
10479 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
10480 | ||
10481 | /* Run scroll hooks. */ | |
10482 | startp = run_window_scroll_functions (window, it.current.pos); | |
10483 | ||
10484 | /* Redisplay the window. */ | |
10485 | if (!current_matrix_up_to_date_p | |
10486 | || windows_or_buffers_changed | |
10487 | /* Don't use try_window_reusing_current_matrix in this case | |
10488 | because it can have changed the buffer. */ | |
10489 | || !NILP (Vwindow_scroll_functions) | |
10490 | || !just_this_one_p | |
10491 | || MINI_WINDOW_P (w) | |
10492 | || !try_window_reusing_current_matrix (w)) | |
10493 | try_window (window, startp); | |
10494 | ||
10495 | /* If new fonts have been loaded (due to fontsets), give up. We | |
10496 | have to start a new redisplay since we need to re-adjust glyph | |
10497 | matrices. */ | |
10498 | if (fonts_changed_p) | |
cb617e7c | 10499 | goto need_larger_matrices; |
5f5c8ee5 GM |
10500 | |
10501 | /* If cursor did not appear assume that the middle of the window is | |
10502 | in the first line of the window. Do it again with the next line. | |
10503 | (Imagine a window of height 100, displaying two lines of height | |
10504 | 60. Moving back 50 from it->last_visible_y will end in the first | |
10505 | line.) */ | |
10506 | if (w->cursor.vpos < 0) | |
a2889657 | 10507 | { |
5f5c8ee5 GM |
10508 | if (!NILP (w->window_end_valid) |
10509 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 10510 | { |
5f5c8ee5 GM |
10511 | clear_glyph_matrix (w->desired_matrix); |
10512 | move_it_by_lines (&it, 1, 0); | |
10513 | try_window (window, it.current.pos); | |
a2889657 | 10514 | } |
5f5c8ee5 | 10515 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 10516 | { |
5f5c8ee5 GM |
10517 | clear_glyph_matrix (w->desired_matrix); |
10518 | move_it_by_lines (&it, -1, 0); | |
10519 | try_window (window, it.current.pos); | |
10520 | } | |
10521 | else | |
10522 | { | |
10523 | /* Not much we can do about it. */ | |
a2889657 | 10524 | } |
a2889657 | 10525 | } |
010494d0 | 10526 | |
5f5c8ee5 GM |
10527 | /* Consider the following case: Window starts at BEGV, there is |
10528 | invisible, intangible text at BEGV, so that display starts at | |
10529 | some point START > BEGV. It can happen that we are called with | |
10530 | PT somewhere between BEGV and START. Try to handle that case. */ | |
10531 | if (w->cursor.vpos < 0) | |
835766b6 | 10532 | { |
5f5c8ee5 GM |
10533 | struct glyph_row *row = w->current_matrix->rows; |
10534 | if (row->mode_line_p) | |
10535 | ++row; | |
10536 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 10537 | } |
5f5c8ee5 | 10538 | |
cb617e7c GM |
10539 | if (!make_cursor_line_fully_visible (w)) |
10540 | goto need_larger_matrices; | |
b5174a51 | 10541 | |
74d481ac GM |
10542 | done: |
10543 | ||
5f5c8ee5 GM |
10544 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
10545 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
10546 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
10547 | ? Qt : Qnil); | |
a2889657 | 10548 | |
5f5c8ee5 | 10549 | /* Display the mode line, if we must. */ |
e481f960 | 10550 | if ((update_mode_line |
aa6d10fa | 10551 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
10552 | if (a) the window to its side is being redone and |
10553 | (b) we do a frame-based redisplay. This is a consequence | |
10554 | of how inverted lines are drawn in frame-based redisplay. */ | |
10555 | || (!just_this_one_p | |
10556 | && !FRAME_WINDOW_P (f) | |
10557 | && !WINDOW_FULL_WIDTH_P (w)) | |
10558 | /* Line number to display. */ | |
155ef550 | 10559 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 10560 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
10561 | || (!NILP (w->column_number_displayed) |
10562 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
10563 | /* This means that the window has a mode line. */ |
10564 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 10565 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 10566 | { |
5f5c8ee5 GM |
10567 | display_mode_lines (w); |
10568 | ||
10569 | /* If mode line height has changed, arrange for a thorough | |
10570 | immediate redisplay using the correct mode line height. */ | |
10571 | if (WINDOW_WANTS_MODELINE_P (w) | |
10572 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 10573 | { |
5f5c8ee5 GM |
10574 | fonts_changed_p = 1; |
10575 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
10576 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 10577 | } |
5f5c8ee5 GM |
10578 | |
10579 | /* If top line height has changed, arrange for a thorough | |
10580 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
10581 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10582 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
10583 | { |
10584 | fonts_changed_p = 1; | |
045dee35 GM |
10585 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
10586 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
10587 | } |
10588 | ||
10589 | if (fonts_changed_p) | |
cb617e7c | 10590 | goto need_larger_matrices; |
5ba50c51 | 10591 | } |
5f5c8ee5 GM |
10592 | |
10593 | if (!line_number_displayed | |
10594 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
10595 | { |
10596 | w->base_line_pos = Qnil; | |
10597 | w->base_line_number = Qnil; | |
10598 | } | |
a2889657 | 10599 | |
5f5c8ee5 GM |
10600 | finish_menu_bars: |
10601 | ||
7ce2c095 | 10602 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 10603 | if (update_mode_line |
5f5c8ee5 GM |
10604 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
10605 | { | |
10606 | int redisplay_menu_p = 0; | |
10607 | ||
10608 | if (FRAME_WINDOW_P (f)) | |
10609 | { | |
1a578e9b | 10610 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
5f5c8ee5 | 10611 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 10612 | #else |
5f5c8ee5 | 10613 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 10614 | #endif |
5f5c8ee5 GM |
10615 | } |
10616 | else | |
10617 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
10618 | ||
10619 | if (redisplay_menu_p) | |
10620 | display_menu_bar (w); | |
10621 | ||
10622 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
10623 | if (WINDOWP (f->tool_bar_window) |
10624 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
10625 | || auto_resize_tool_bars_p)) | |
10626 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
10627 | #endif |
10628 | } | |
7ce2c095 | 10629 | |
cb617e7c GM |
10630 | need_larger_matrices: |
10631 | ; | |
88f22aff | 10632 | finish_scroll_bars: |
5f5c8ee5 | 10633 | |
88f22aff | 10634 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 10635 | { |
b1d1124b | 10636 | int start, end, whole; |
30c566e4 | 10637 | |
b1d1124b | 10638 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
10639 | At some point, it would be nice to choose between scrollbars |
10640 | which reflect the whole buffer size, with special markers | |
10641 | indicating narrowing, and scrollbars which reflect only the | |
10642 | visible region. | |
10643 | ||
5f5c8ee5 | 10644 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 10645 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 10646 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 10647 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 10648 | { |
8a9311d7 | 10649 | whole = ZV - BEGV; |
4d641a15 | 10650 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
10651 | /* I don't think this is guaranteed to be right. For the |
10652 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 10653 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 10654 | |
5f5c8ee5 GM |
10655 | if (end < start) |
10656 | end = start; | |
10657 | if (whole < (end - start)) | |
10658 | whole = end - start; | |
b1d1124b JB |
10659 | } |
10660 | else | |
10661 | start = end = whole = 0; | |
30c566e4 | 10662 | |
88f22aff | 10663 | /* Indicate what this scroll bar ought to be displaying now. */ |
504454e8 | 10664 | set_vertical_scroll_bar_hook (w, end - start, whole, start); |
30c566e4 | 10665 | |
5f5c8ee5 GM |
10666 | /* Note that we actually used the scroll bar attached to this |
10667 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 10668 | redeem_scroll_bar_hook (w); |
30c566e4 | 10669 | } |
b1d1124b | 10670 | |
5f5c8ee5 GM |
10671 | /* Restore current_buffer and value of point in it. */ |
10672 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 10673 | set_buffer_internal_1 (old); |
5f5c8ee5 | 10674 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
10675 | |
10676 | unbind_to (count, Qnil); | |
a2889657 | 10677 | } |
a2889657 | 10678 | |
5f5c8ee5 GM |
10679 | |
10680 | /* Build the complete desired matrix of WINDOW with a window start | |
10681 | buffer position POS. Value is non-zero if successful. It is zero | |
10682 | if fonts were loaded during redisplay which makes re-adjusting | |
10683 | glyph matrices necessary. */ | |
10684 | ||
10685 | int | |
a2889657 JB |
10686 | try_window (window, pos) |
10687 | Lisp_Object window; | |
5f5c8ee5 GM |
10688 | struct text_pos pos; |
10689 | { | |
10690 | struct window *w = XWINDOW (window); | |
10691 | struct it it; | |
10692 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 10693 | |
5f5c8ee5 GM |
10694 | /* Make POS the new window start. */ |
10695 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 10696 | |
5f5c8ee5 GM |
10697 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
10698 | w->cursor.vpos = -1; | |
a2889657 | 10699 | overlay_arrow_seen = 0; |
642eefc6 | 10700 | |
5f5c8ee5 GM |
10701 | /* Initialize iterator and info to start at POS. */ |
10702 | start_display (&it, w, pos); | |
a2889657 | 10703 | |
5f5c8ee5 GM |
10704 | /* Display all lines of W. */ |
10705 | while (it.current_y < it.last_visible_y) | |
10706 | { | |
10707 | if (display_line (&it)) | |
10708 | last_text_row = it.glyph_row - 1; | |
10709 | if (fonts_changed_p) | |
10710 | return 0; | |
10711 | } | |
a2889657 | 10712 | |
5f5c8ee5 GM |
10713 | /* If bottom moved off end of frame, change mode line percentage. */ |
10714 | if (XFASTINT (w->window_end_pos) <= 0 | |
10715 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
10716 | w->update_mode_line = Qt; |
10717 | ||
5f5c8ee5 GM |
10718 | /* Set window_end_pos to the offset of the last character displayed |
10719 | on the window from the end of current_buffer. Set | |
10720 | window_end_vpos to its row number. */ | |
10721 | if (last_text_row) | |
10722 | { | |
10723 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
10724 | w->window_end_bytepos | |
10725 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10726 | w->window_end_pos |
10727 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10728 | w->window_end_vpos | |
10729 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10730 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
10731 | ->displays_text_p); | |
10732 | } | |
10733 | else | |
10734 | { | |
10735 | w->window_end_bytepos = 0; | |
ac90c44f | 10736 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
10737 | } |
10738 | ||
a2889657 JB |
10739 | /* But that is not valid info until redisplay finishes. */ |
10740 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 10741 | return 1; |
a2889657 | 10742 | } |
5f5c8ee5 GM |
10743 | |
10744 | ||
a2889657 | 10745 | \f |
5f5c8ee5 GM |
10746 | /************************************************************************ |
10747 | Window redisplay reusing current matrix when buffer has not changed | |
10748 | ************************************************************************/ | |
10749 | ||
10750 | /* Try redisplay of window W showing an unchanged buffer with a | |
10751 | different window start than the last time it was displayed by | |
10752 | reusing its current matrix. Value is non-zero if successful. | |
10753 | W->start is the new window start. */ | |
a2889657 JB |
10754 | |
10755 | static int | |
5f5c8ee5 GM |
10756 | try_window_reusing_current_matrix (w) |
10757 | struct window *w; | |
a2889657 | 10758 | { |
5f5c8ee5 GM |
10759 | struct frame *f = XFRAME (w->frame); |
10760 | struct glyph_row *row, *bottom_row; | |
10761 | struct it it; | |
10762 | struct run run; | |
10763 | struct text_pos start, new_start; | |
10764 | int nrows_scrolled, i; | |
10765 | struct glyph_row *last_text_row; | |
10766 | struct glyph_row *last_reused_text_row; | |
10767 | struct glyph_row *start_row; | |
10768 | int start_vpos, min_y, max_y; | |
75c5350a | 10769 | |
69d1f7c9 | 10770 | #if GLYPH_DEBUG |
76cb5e06 GM |
10771 | if (inhibit_try_window_reusing) |
10772 | return 0; | |
10773 | #endif | |
10774 | ||
d18354b6 GM |
10775 | if (/* This function doesn't handle terminal frames. */ |
10776 | !FRAME_WINDOW_P (f) | |
10777 | /* Don't try to reuse the display if windows have been split | |
10778 | or such. */ | |
10779 | || windows_or_buffers_changed) | |
5f5c8ee5 | 10780 | return 0; |
a2889657 | 10781 | |
5f5c8ee5 GM |
10782 | /* Can't do this if region may have changed. */ |
10783 | if ((!NILP (Vtransient_mark_mode) | |
10784 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
10785 | || !NILP (w->region_showing) |
10786 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 10787 | return 0; |
a2889657 | 10788 | |
5f5c8ee5 | 10789 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
10790 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10791 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
10792 | return 0; |
10793 | ||
10794 | /* Give up if old or new display is scrolled vertically. We could | |
10795 | make this function handle this, but right now it doesn't. */ | |
10796 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10797 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
10798 | return 0; | |
10799 | ||
10800 | /* The variable new_start now holds the new window start. The old | |
10801 | start `start' can be determined from the current matrix. */ | |
10802 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
10803 | start = start_row->start.pos; | |
10804 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 10805 | |
5f5c8ee5 GM |
10806 | /* Clear the desired matrix for the display below. */ |
10807 | clear_glyph_matrix (w->desired_matrix); | |
10808 | ||
10809 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
10810 | { | |
10811 | int first_row_y; | |
10812 | ||
607ec83c GM |
10813 | /* Don't use this method if the display starts with an ellipsis |
10814 | displayed for invisible text. It's not easy to handle that case | |
10815 | below, and it's certainly not worth the effort since this is | |
10816 | not a frequent case. */ | |
10817 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
10818 | return 0; | |
10819 | ||
5f5c8ee5 GM |
10820 | IF_DEBUG (debug_method_add (w, "twu1")); |
10821 | ||
10822 | /* Display up to a row that can be reused. The variable | |
10823 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
10824 | text. Note that it.vpos == 0 if or if not there is a |
10825 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
10826 | start_display (&it, w, new_start); |
10827 | first_row_y = it.current_y; | |
10828 | w->cursor.vpos = -1; | |
10829 | last_text_row = last_reused_text_row = NULL; | |
b48f74cb | 10830 | |
5f5c8ee5 GM |
10831 | while (it.current_y < it.last_visible_y |
10832 | && IT_CHARPOS (it) < CHARPOS (start) | |
10833 | && !fonts_changed_p) | |
10834 | if (display_line (&it)) | |
10835 | last_text_row = it.glyph_row - 1; | |
10836 | ||
10837 | /* A value of current_y < last_visible_y means that we stopped | |
10838 | at the previous window start, which in turn means that we | |
10839 | have at least one reusable row. */ | |
10840 | if (it.current_y < it.last_visible_y) | |
a2889657 | 10841 | { |
b48f74cb | 10842 | /* IT.vpos always starts from 0; it counts text lines. */ |
5f5c8ee5 GM |
10843 | nrows_scrolled = it.vpos; |
10844 | ||
10845 | /* Find PT if not already found in the lines displayed. */ | |
10846 | if (w->cursor.vpos < 0) | |
a2889657 | 10847 | { |
5f5c8ee5 GM |
10848 | int dy = it.current_y - first_row_y; |
10849 | ||
10850 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
0df56f4d GM |
10851 | row = row_containing_pos (w, PT, row, NULL, dy); |
10852 | if (row) | |
10853 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
10854 | dy, nrows_scrolled); | |
10855 | else | |
5f5c8ee5 GM |
10856 | { |
10857 | clear_glyph_matrix (w->desired_matrix); | |
10858 | return 0; | |
10859 | } | |
a2889657 | 10860 | } |
5f5c8ee5 GM |
10861 | |
10862 | /* Scroll the display. Do it before the current matrix is | |
10863 | changed. The problem here is that update has not yet | |
10864 | run, i.e. part of the current matrix is not up to date. | |
10865 | scroll_run_hook will clear the cursor, and use the | |
10866 | current matrix to get the height of the row the cursor is | |
10867 | in. */ | |
10868 | run.current_y = first_row_y; | |
10869 | run.desired_y = it.current_y; | |
10870 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
10871 | |
10872 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 10873 | { |
5f5c8ee5 GM |
10874 | update_begin (f); |
10875 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 10876 | rif->clear_mouse_face (w); |
5f5c8ee5 | 10877 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 10878 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 10879 | update_end (f); |
a2889657 | 10880 | } |
5f5c8ee5 GM |
10881 | |
10882 | /* Shift current matrix down by nrows_scrolled lines. */ | |
10883 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
10884 | rotate_matrix (w->current_matrix, | |
10885 | start_vpos, | |
10886 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
10887 | nrows_scrolled); | |
10888 | ||
9c8b8382 | 10889 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 10890 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 10891 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 10892 | |
5f5c8ee5 | 10893 | /* Re-compute Y positions. */ |
045dee35 | 10894 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 10895 | max_y = it.last_visible_y; |
b48f74cb GM |
10896 | for (row = start_row + nrows_scrolled; |
10897 | row < bottom_row; | |
10898 | ++row) | |
d2f84654 | 10899 | { |
5f5c8ee5 | 10900 | row->y = it.current_y; |
75c5350a | 10901 | row->visible_height = row->height; |
5f5c8ee5 GM |
10902 | |
10903 | if (row->y < min_y) | |
75c5350a GM |
10904 | row->visible_height -= min_y - row->y; |
10905 | if (row->y + row->height > max_y) | |
10906 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
10907 | |
10908 | it.current_y += row->height; | |
5f5c8ee5 GM |
10909 | |
10910 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
10911 | last_reused_text_row = row; | |
10912 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
10913 | break; | |
d2f84654 | 10914 | } |
9c8b8382 GM |
10915 | |
10916 | /* Disable lines in the current matrix which are now | |
10917 | below the window. */ | |
bafb434c | 10918 | for (++row; row < bottom_row; ++row) |
9c8b8382 | 10919 | row->enabled_p = 0; |
a2889657 | 10920 | } |
5f5c8ee5 GM |
10921 | |
10922 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
10923 | reused row from the current matrix containing text, if any. | |
10924 | The value of last_text_row is the last displayed line | |
10925 | containing text. */ | |
10926 | if (last_reused_text_row) | |
a2889657 | 10927 | { |
5f5c8ee5 GM |
10928 | w->window_end_bytepos |
10929 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
10930 | w->window_end_pos |
10931 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
10932 | w->window_end_vpos | |
10933 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
10934 | w->current_matrix)); | |
a2889657 | 10935 | } |
5f5c8ee5 GM |
10936 | else if (last_text_row) |
10937 | { | |
10938 | w->window_end_bytepos | |
10939 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10940 | w->window_end_pos |
10941 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10942 | w->window_end_vpos | |
10943 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10944 | } |
10945 | else | |
10946 | { | |
10947 | /* This window must be completely empty. */ | |
10948 | w->window_end_bytepos = 0; | |
ac90c44f | 10949 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
10950 | } |
10951 | w->window_end_valid = Qnil; | |
a2889657 | 10952 | |
5f5c8ee5 GM |
10953 | /* Update hint: don't try scrolling again in update_window. */ |
10954 | w->desired_matrix->no_scrolling_p = 1; | |
10955 | ||
10956 | #if GLYPH_DEBUG | |
10957 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
10958 | #endif | |
10959 | return 1; | |
a2889657 | 10960 | } |
5f5c8ee5 GM |
10961 | else if (CHARPOS (new_start) > CHARPOS (start)) |
10962 | { | |
10963 | struct glyph_row *pt_row, *row; | |
10964 | struct glyph_row *first_reusable_row; | |
10965 | struct glyph_row *first_row_to_display; | |
10966 | int dy; | |
10967 | int yb = window_text_bottom_y (w); | |
10968 | ||
5f5c8ee5 GM |
10969 | /* Find the row starting at new_start, if there is one. Don't |
10970 | reuse a partially visible line at the end. */ | |
b48f74cb | 10971 | first_reusable_row = start_row; |
5f5c8ee5 GM |
10972 | while (first_reusable_row->enabled_p |
10973 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
10974 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
10975 | < CHARPOS (new_start))) | |
10976 | ++first_reusable_row; | |
10977 | ||
10978 | /* Give up if there is no row to reuse. */ | |
10979 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
10980 | || !first_reusable_row->enabled_p |
10981 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
10982 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
10983 | return 0; |
10984 | ||
5f5c8ee5 GM |
10985 | /* We can reuse fully visible rows beginning with |
10986 | first_reusable_row to the end of the window. Set | |
10987 | first_row_to_display to the first row that cannot be reused. | |
10988 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 10989 | pt_row = NULL; |
ac90c44f GM |
10990 | for (first_row_to_display = first_reusable_row; |
10991 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
10992 | ++first_row_to_display) | |
5f5c8ee5 | 10993 | { |
4bde0ebb GM |
10994 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
10995 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 10996 | pt_row = first_row_to_display; |
5f5c8ee5 | 10997 | } |
a2889657 | 10998 | |
5f5c8ee5 GM |
10999 | /* Start displaying at the start of first_row_to_display. */ |
11000 | xassert (first_row_to_display->y < yb); | |
11001 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 11002 | |
b48f74cb GM |
11003 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
11004 | - start_vpos); | |
5f5c8ee5 GM |
11005 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
11006 | - nrows_scrolled); | |
b48f74cb GM |
11007 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
11008 | + WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); | |
5f5c8ee5 GM |
11009 | |
11010 | /* Display lines beginning with first_row_to_display in the | |
11011 | desired matrix. Set last_text_row to the last row displayed | |
11012 | that displays text. */ | |
11013 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
11014 | if (pt_row == NULL) | |
11015 | w->cursor.vpos = -1; | |
11016 | last_text_row = NULL; | |
11017 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
11018 | if (display_line (&it)) | |
11019 | last_text_row = it.glyph_row - 1; | |
11020 | ||
11021 | /* Give up If point isn't in a row displayed or reused. */ | |
11022 | if (w->cursor.vpos < 0) | |
11023 | { | |
11024 | clear_glyph_matrix (w->desired_matrix); | |
11025 | return 0; | |
11026 | } | |
12adba34 | 11027 | |
5f5c8ee5 GM |
11028 | /* If point is in a reused row, adjust y and vpos of the cursor |
11029 | position. */ | |
11030 | if (pt_row) | |
11031 | { | |
11032 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
11033 | w->current_matrix); | |
11034 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
11035 | } |
11036 | ||
5f5c8ee5 GM |
11037 | /* Scroll the display. */ |
11038 | run.current_y = first_reusable_row->y; | |
045dee35 | 11039 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11040 | run.height = it.last_visible_y - run.current_y; |
4da61803 GM |
11041 | dy = run.current_y - run.desired_y; |
11042 | ||
5f5c8ee5 GM |
11043 | if (run.height) |
11044 | { | |
11045 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
11046 | update_begin (f); | |
11047 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11048 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11049 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11050 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11051 | update_end (f); |
11052 | } | |
a2889657 | 11053 | |
5f5c8ee5 GM |
11054 | /* Adjust Y positions of reused rows. */ |
11055 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
045dee35 | 11056 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 11057 | max_y = it.last_visible_y; |
b48f74cb | 11058 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
11059 | { |
11060 | row->y -= dy; | |
75c5350a | 11061 | row->visible_height = row->height; |
5f5c8ee5 | 11062 | if (row->y < min_y) |
75c5350a GM |
11063 | row->visible_height -= min_y - row->y; |
11064 | if (row->y + row->height > max_y) | |
11065 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 11066 | } |
a2889657 | 11067 | |
5f5c8ee5 GM |
11068 | /* Scroll the current matrix. */ |
11069 | xassert (nrows_scrolled > 0); | |
11070 | rotate_matrix (w->current_matrix, | |
11071 | start_vpos, | |
11072 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
11073 | -nrows_scrolled); | |
11074 | ||
ac90c44f GM |
11075 | /* Disable rows not reused. */ |
11076 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
11077 | row->enabled_p = 0; | |
11078 | ||
5f5c8ee5 GM |
11079 | /* Adjust window end. A null value of last_text_row means that |
11080 | the window end is in reused rows which in turn means that | |
11081 | only its vpos can have changed. */ | |
11082 | if (last_text_row) | |
11083 | { | |
11084 | w->window_end_bytepos | |
11085 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11086 | w->window_end_pos |
11087 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
11088 | w->window_end_vpos | |
11089 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
11090 | } |
11091 | else | |
a2889657 | 11092 | { |
ac90c44f GM |
11093 | w->window_end_vpos |
11094 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 11095 | } |
5f5c8ee5 GM |
11096 | |
11097 | w->window_end_valid = Qnil; | |
11098 | w->desired_matrix->no_scrolling_p = 1; | |
11099 | ||
11100 | #if GLYPH_DEBUG | |
11101 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
11102 | #endif | |
11103 | return 1; | |
a2889657 | 11104 | } |
5f5c8ee5 GM |
11105 | |
11106 | return 0; | |
11107 | } | |
a2889657 | 11108 | |
a2889657 | 11109 | |
5f5c8ee5 GM |
11110 | \f |
11111 | /************************************************************************ | |
11112 | Window redisplay reusing current matrix when buffer has changed | |
11113 | ************************************************************************/ | |
11114 | ||
1ec185cb GM |
11115 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
11116 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
11117 | int *, int *)); |
11118 | static struct glyph_row * | |
11119 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
11120 | struct glyph_row *)); | |
11121 | ||
11122 | ||
11123 | /* Return the last row in MATRIX displaying text. If row START is | |
11124 | non-null, start searching with that row. IT gives the dimensions | |
11125 | of the display. Value is null if matrix is empty; otherwise it is | |
11126 | a pointer to the row found. */ | |
11127 | ||
11128 | static struct glyph_row * | |
11129 | find_last_row_displaying_text (matrix, it, start) | |
11130 | struct glyph_matrix *matrix; | |
11131 | struct it *it; | |
11132 | struct glyph_row *start; | |
11133 | { | |
11134 | struct glyph_row *row, *row_found; | |
11135 | ||
11136 | /* Set row_found to the last row in IT->w's current matrix | |
11137 | displaying text. The loop looks funny but think of partially | |
11138 | visible lines. */ | |
11139 | row_found = NULL; | |
11140 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
11141 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11142 | { | |
11143 | xassert (row->enabled_p); | |
11144 | row_found = row; | |
11145 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
11146 | break; | |
11147 | ++row; | |
a2889657 | 11148 | } |
5f5c8ee5 GM |
11149 | |
11150 | return row_found; | |
11151 | } | |
11152 | ||
a2889657 | 11153 | |
5f5c8ee5 | 11154 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
11155 | by changes at the start of current_buffer that occurred since W's |
11156 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 11157 | |
d43fbe9d GM |
11158 | BEG_UNCHANGED us the number of characters unchanged at the start of |
11159 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
11160 | first changed character in current_buffer. Characters at positions < | |
11161 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
11162 | when the current matrix was built. */ | |
5f5c8ee5 GM |
11163 | |
11164 | static struct glyph_row * | |
1ec185cb | 11165 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
11166 | struct window *w; |
11167 | { | |
9142dd5b | 11168 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
11169 | struct glyph_row *row; |
11170 | struct glyph_row *row_found = NULL; | |
11171 | int yb = window_text_bottom_y (w); | |
11172 | ||
11173 | /* Find the last row displaying unchanged text. */ | |
11174 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11175 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
11176 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 11177 | { |
5f5c8ee5 GM |
11178 | if (/* If row ends before first_changed_pos, it is unchanged, |
11179 | except in some case. */ | |
11180 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
11181 | /* When row ends in ZV and we write at ZV it is not | |
11182 | unchanged. */ | |
11183 | && !row->ends_at_zv_p | |
11184 | /* When first_changed_pos is the end of a continued line, | |
11185 | row is not unchanged because it may be no longer | |
11186 | continued. */ | |
11187 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
11188 | && row->continued_p)) | |
11189 | row_found = row; | |
11190 | ||
11191 | /* Stop if last visible row. */ | |
11192 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
11193 | break; | |
11194 | ||
11195 | ++row; | |
a2889657 JB |
11196 | } |
11197 | ||
5f5c8ee5 | 11198 | return row_found; |
a2889657 | 11199 | } |
5f5c8ee5 GM |
11200 | |
11201 | ||
11202 | /* Find the first glyph row in the current matrix of W that is not | |
d43fbe9d GM |
11203 | affected by changes at the end of current_buffer since the |
11204 | time W's current matrix was built. | |
11205 | ||
11206 | Return in *DELTA the number of chars by which buffer positions in | |
11207 | unchanged text at the end of current_buffer must be adjusted. | |
11208 | ||
11209 | Return in *DELTA_BYTES the corresponding number of bytes. | |
11210 | ||
11211 | Value is null if no such row exists, i.e. all rows are affected by | |
11212 | changes. */ | |
5f5c8ee5 GM |
11213 | |
11214 | static struct glyph_row * | |
1ec185cb | 11215 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
11216 | struct window *w; |
11217 | int *delta, *delta_bytes; | |
a2889657 | 11218 | { |
5f5c8ee5 GM |
11219 | struct glyph_row *row; |
11220 | struct glyph_row *row_found = NULL; | |
c581d710 | 11221 | |
5f5c8ee5 | 11222 | *delta = *delta_bytes = 0; |
b2a76982 | 11223 | |
1ec185cb GM |
11224 | /* Display must not have been paused, otherwise the current matrix |
11225 | is not up to date. */ | |
11226 | if (NILP (w->window_end_valid)) | |
11227 | abort (); | |
11228 | ||
11229 | /* A value of window_end_pos >= END_UNCHANGED means that the window | |
5f5c8ee5 GM |
11230 | end is in the range of changed text. If so, there is no |
11231 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 11232 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
11233 | return NULL; |
11234 | ||
11235 | /* Set row to the last row in W's current matrix displaying text. */ | |
11236 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
11237 | ||
5f5c8ee5 GM |
11238 | /* If matrix is entirely empty, no unchanged row exists. */ |
11239 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11240 | { | |
11241 | /* The value of row is the last glyph row in the matrix having a | |
11242 | meaningful buffer position in it. The end position of row | |
11243 | corresponds to window_end_pos. This allows us to translate | |
11244 | buffer positions in the current matrix to current buffer | |
11245 | positions for characters not in changed text. */ | |
11246 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11247 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11248 | int last_unchanged_pos, last_unchanged_pos_old; | |
11249 | struct glyph_row *first_text_row | |
11250 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11251 | ||
11252 | *delta = Z - Z_old; | |
11253 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
11254 | ||
11255 | /* Set last_unchanged_pos to the buffer position of the last | |
11256 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
11257 | index + 1 of the last character in current_buffer, i.e. by |
11258 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
11259 | unchanged character, and we have to add BEG to get its buffer |
11260 | position. */ | |
9142dd5b | 11261 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
11262 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
11263 | ||
11264 | /* Search backward from ROW for a row displaying a line that | |
11265 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 11266 | for (; row > first_text_row; --row) |
5f5c8ee5 | 11267 | { |
1ec185cb GM |
11268 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11269 | abort (); | |
5f5c8ee5 GM |
11270 | |
11271 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
11272 | row_found = row; | |
5f5c8ee5 GM |
11273 | } |
11274 | } | |
11275 | ||
1ec185cb GM |
11276 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
11277 | abort (); | |
11278 | ||
5f5c8ee5 | 11279 | return row_found; |
c581d710 RS |
11280 | } |
11281 | ||
c581d710 | 11282 | |
5f5c8ee5 GM |
11283 | /* Make sure that glyph rows in the current matrix of window W |
11284 | reference the same glyph memory as corresponding rows in the | |
11285 | frame's frame matrix. This function is called after scrolling W's | |
11286 | current matrix on a terminal frame in try_window_id and | |
11287 | try_window_reusing_current_matrix. */ | |
11288 | ||
11289 | static void | |
11290 | sync_frame_with_window_matrix_rows (w) | |
11291 | struct window *w; | |
c581d710 | 11292 | { |
5f5c8ee5 GM |
11293 | struct frame *f = XFRAME (w->frame); |
11294 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
11295 | ||
11296 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
11297 | must have a frame matrix. */ | |
11298 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
11299 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
11300 | xassert (!FRAME_WINDOW_P (f)); | |
11301 | ||
11302 | /* If W is a full-width window, glyph pointers in W's current matrix | |
11303 | have, by definition, to be the same as glyph pointers in the | |
11304 | corresponding frame matrix. */ | |
11305 | window_row = w->current_matrix->rows; | |
11306 | window_row_end = window_row + w->current_matrix->nrows; | |
11307 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
11308 | while (window_row < window_row_end) | |
659a218f | 11309 | { |
5f5c8ee5 | 11310 | int area; |
f002db93 | 11311 | |
5f5c8ee5 GM |
11312 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) |
11313 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
f002db93 GM |
11314 | |
11315 | /* Disable frame rows whose corresponding window rows have | |
11316 | been disabled in try_window_id. */ | |
11317 | if (!window_row->enabled_p) | |
11318 | frame_row->enabled_p = 0; | |
11319 | ||
5f5c8ee5 | 11320 | ++window_row, ++frame_row; |
659a218f | 11321 | } |
a2889657 | 11322 | } |
5f5c8ee5 GM |
11323 | |
11324 | ||
e037b9ec GM |
11325 | /* Find the glyph row in window W containing CHARPOS. Consider all |
11326 | rows between START and END (not inclusive). END null means search | |
11327 | all rows to the end of the display area of W. Value is the row | |
11328 | containing CHARPOS or null. */ | |
11329 | ||
0bef35bc | 11330 | struct glyph_row * |
0df56f4d | 11331 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
11332 | struct window *w; |
11333 | int charpos; | |
11334 | struct glyph_row *start, *end; | |
0df56f4d | 11335 | int dy; |
e037b9ec GM |
11336 | { |
11337 | struct glyph_row *row = start; | |
11338 | int last_y; | |
11339 | ||
11340 | /* If we happen to start on a header-line, skip that. */ | |
11341 | if (row->mode_line_p) | |
11342 | ++row; | |
11343 | ||
11344 | if ((end && row >= end) || !row->enabled_p) | |
11345 | return NULL; | |
11346 | ||
0df56f4d | 11347 | last_y = window_text_bottom_y (w) - dy; |
e037b9ec GM |
11348 | |
11349 | while ((end == NULL || row < end) | |
0df56f4d | 11350 | && MATRIX_ROW_BOTTOM_Y (row) < last_y |
e037b9ec | 11351 | && (MATRIX_ROW_END_CHARPOS (row) < charpos |
e037b9ec | 11352 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
11353 | /* The end position of a row equals the start |
11354 | position of the next row. If CHARPOS is there, we | |
11355 | would rather display it in the next line, except | |
11356 | when this line ends in ZV. */ | |
11357 | && !row->ends_at_zv_p | |
11358 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)))) | |
e037b9ec GM |
11359 | ++row; |
11360 | ||
11361 | /* Give up if CHARPOS not found. */ | |
11362 | if ((end && row >= end) | |
11363 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
11364 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
11365 | row = NULL; | |
11366 | ||
11367 | return row; | |
11368 | } | |
11369 | ||
11370 | ||
5f5c8ee5 GM |
11371 | /* Try to redisplay window W by reusing its existing display. W's |
11372 | current matrix must be up to date when this function is called, | |
11373 | i.e. window_end_valid must not be nil. | |
11374 | ||
11375 | Value is | |
11376 | ||
11377 | 1 if display has been updated | |
11378 | 0 if otherwise unsuccessful | |
11379 | -1 if redisplay with same window start is known not to succeed | |
11380 | ||
11381 | The following steps are performed: | |
11382 | ||
11383 | 1. Find the last row in the current matrix of W that is not | |
11384 | affected by changes at the start of current_buffer. If no such row | |
11385 | is found, give up. | |
11386 | ||
11387 | 2. Find the first row in W's current matrix that is not affected by | |
11388 | changes at the end of current_buffer. Maybe there is no such row. | |
11389 | ||
11390 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
11391 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
11392 | the window. | |
11393 | ||
11394 | 4. If cursor is not known to appear on the window, give up. | |
11395 | ||
11396 | 5. If display stopped at the row found in step 2, scroll the | |
11397 | display and current matrix as needed. | |
11398 | ||
11399 | 6. Maybe display some lines at the end of W, if we must. This can | |
11400 | happen under various circumstances, like a partially visible line | |
11401 | becoming fully visible, or because newly displayed lines are displayed | |
11402 | in smaller font sizes. | |
11403 | ||
11404 | 7. Update W's window end information. */ | |
11405 | ||
12adba34 | 11406 | static int |
5f5c8ee5 | 11407 | try_window_id (w) |
12adba34 | 11408 | struct window *w; |
12adba34 | 11409 | { |
5f5c8ee5 GM |
11410 | struct frame *f = XFRAME (w->frame); |
11411 | struct glyph_matrix *current_matrix = w->current_matrix; | |
11412 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
11413 | struct glyph_row *last_unchanged_at_beg_row; | |
11414 | struct glyph_row *first_unchanged_at_end_row; | |
11415 | struct glyph_row *row; | |
11416 | struct glyph_row *bottom_row; | |
11417 | int bottom_vpos; | |
11418 | struct it it; | |
11419 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
11420 | struct text_pos start_pos; | |
11421 | struct run run; | |
11422 | int first_unchanged_at_end_vpos = 0; | |
11423 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
11424 | struct text_pos start; | |
27d16f05 | 11425 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 11426 | |
69d1f7c9 | 11427 | #if GLYPH_DEBUG |
76cb5e06 GM |
11428 | if (inhibit_try_window_id) |
11429 | return 0; | |
11430 | #endif | |
11431 | ||
27d16f05 GM |
11432 | /* This is handy for debugging. */ |
11433 | #if 0 | |
11434 | #define GIVE_UP(X) \ | |
11435 | do { \ | |
11436 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
11437 | return 0; \ | |
11438 | } while (0) | |
11439 | #else | |
62397849 | 11440 | #define GIVE_UP(X) return 0 |
27d16f05 GM |
11441 | #endif |
11442 | ||
5f5c8ee5 GM |
11443 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
11444 | ||
27d16f05 GM |
11445 | /* Don't use this for mini-windows because these can show |
11446 | messages and mini-buffers, and we don't handle that here. */ | |
11447 | if (MINI_WINDOW_P (w)) | |
11448 | GIVE_UP (1); | |
11449 | ||
11450 | /* This flag is used to prevent redisplay optimizations. */ | |
11451 | if (windows_or_buffers_changed) | |
11452 | GIVE_UP (2); | |
11453 | ||
f5376658 | 11454 | /* Verify that narrowing has not changed. This flag is also set to prevent |
27d16f05 GM |
11455 | redisplay optimizations. It would be nice to further |
11456 | reduce the number of cases where this prevents try_window_id. */ | |
11457 | if (current_buffer->clip_changed) | |
11458 | GIVE_UP (3); | |
11459 | ||
11460 | /* Window must either use window-based redisplay or be full width. */ | |
11461 | if (!FRAME_WINDOW_P (f) | |
11462 | && (!line_ins_del_ok | |
11463 | || !WINDOW_FULL_WIDTH_P (w))) | |
11464 | GIVE_UP (4); | |
5f5c8ee5 | 11465 | |
f5376658 | 11466 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
11467 | if (PT < CHARPOS (start)) |
11468 | GIVE_UP (5); | |
11469 | ||
11470 | /* Another way to prevent redisplay optimizations. */ | |
11471 | if (XFASTINT (w->last_modified) == 0) | |
11472 | GIVE_UP (6); | |
11473 | ||
f5376658 | 11474 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
11475 | if (XFASTINT (w->hscroll) != 0) |
11476 | GIVE_UP (7); | |
11477 | ||
f5376658 | 11478 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
11479 | if (NILP (w->window_end_valid)) |
11480 | GIVE_UP (8); | |
11481 | ||
11482 | /* Can't use this if highlighting a region because a cursor movement | |
11483 | will do more than just set the cursor. */ | |
11484 | if (!NILP (Vtransient_mark_mode) | |
11485 | && !NILP (current_buffer->mark_active)) | |
11486 | GIVE_UP (9); | |
11487 | ||
11488 | /* Likewise if highlighting trailing whitespace. */ | |
11489 | if (!NILP (Vshow_trailing_whitespace)) | |
11490 | GIVE_UP (11); | |
11491 | ||
11492 | /* Likewise if showing a region. */ | |
11493 | if (!NILP (w->region_showing)) | |
11494 | GIVE_UP (10); | |
11495 | ||
11496 | /* Can use this if overlay arrow position and or string have changed. */ | |
11497 | if (!EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) | |
11498 | || !EQ (last_arrow_string, Voverlay_arrow_string)) | |
11499 | GIVE_UP (12); | |
11500 | ||
11501 | ||
5f5c8ee5 GM |
11502 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
11503 | only if buffer has really changed. The reason is that the gap is | |
11504 | initially at Z for freshly visited files. The code below would | |
11505 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
11506 | if (MODIFF > SAVE_MODIFF |
11507 | /* This seems to happen sometimes after saving a buffer. */ | |
11508 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 11509 | { |
9142dd5b GM |
11510 | if (GPT - BEG < BEG_UNCHANGED) |
11511 | BEG_UNCHANGED = GPT - BEG; | |
11512 | if (Z - GPT < END_UNCHANGED) | |
11513 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 11514 | } |
bf9249e3 | 11515 | |
27d16f05 GM |
11516 | /* The position of the first and last character that has been changed. */ |
11517 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
11518 | last_changed_charpos = Z - END_UNCHANGED; | |
11519 | ||
5f5c8ee5 GM |
11520 | /* If window starts after a line end, and the last change is in |
11521 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
11522 | This case happens with stealth-fontification. Note that although |
11523 | the display is unchanged, glyph positions in the matrix have to | |
11524 | be adjusted, of course. */ | |
5f5c8ee5 | 11525 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 11526 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 11527 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 11528 | && CHARPOS (start) == BEGV) |
e60f4527 | 11529 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
11530 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
11531 | { | |
11532 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
11533 | struct glyph_row *r0; | |
11534 | ||
11535 | /* Compute how many chars/bytes have been added to or removed | |
11536 | from the buffer. */ | |
11537 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11538 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11539 | delta = Z - Z_old; | |
11540 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
11541 | ||
11542 | /* Give up if PT is not in the window. Note that it already has | |
11543 | been checked at the start of try_window_id that PT is not in | |
11544 | front of the window start. */ | |
11545 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
11546 | GIVE_UP (13); | |
11547 | ||
11548 | /* If window start is unchanged, we can reuse the whole matrix | |
11549 | as is, after adjusting glyph positions. No need to compute | |
11550 | the window end again, since its offset from Z hasn't changed. */ | |
11551 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11552 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
11553 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes) | |
11554 | { | |
11555 | /* Adjust positions in the glyph matrix. */ | |
11556 | if (delta || delta_bytes) | |
11557 | { | |
11558 | struct glyph_row *r1 | |
11559 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11560 | increment_matrix_positions (w->current_matrix, | |
11561 | MATRIX_ROW_VPOS (r0, current_matrix), | |
11562 | MATRIX_ROW_VPOS (r1, current_matrix), | |
11563 | delta, delta_bytes); | |
11564 | } | |
e5959a9a | 11565 | |
27d16f05 | 11566 | /* Set the cursor. */ |
0df56f4d | 11567 | row = row_containing_pos (w, PT, r0, NULL, 0); |
27d16f05 GM |
11568 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); |
11569 | return 1; | |
11570 | } | |
5f5c8ee5 GM |
11571 | } |
11572 | ||
27d16f05 | 11573 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 11574 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
11575 | be taken if ZV is visible in the window, and text has been added |
11576 | there that is visible in the window. */ | |
11577 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
11578 | /* ZV is not visible in the window, or there are no |
11579 | changes at ZV, actually. */ | |
11580 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
11581 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 11582 | { |
27d16f05 | 11583 | struct glyph_row *r0; |
ef121659 | 11584 | |
27d16f05 GM |
11585 | /* Give up if PT is not in the window. Note that it already has |
11586 | been checked at the start of try_window_id that PT is not in | |
11587 | front of the window start. */ | |
11588 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
11589 | GIVE_UP (14); | |
11590 | ||
11591 | /* If window start is unchanged, we can reuse the whole matrix | |
11592 | as is, without changing glyph positions since no text has | |
11593 | been added/removed in front of the window end. */ | |
11594 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11595 | if (TEXT_POS_EQUAL_P (start, r0->start.pos)) | |
11596 | { | |
11597 | /* We have to compute the window end anew since text | |
11598 | can have been added/removed after it. */ | |
11599 | w->window_end_pos | |
11600 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
11601 | w->window_end_bytepos | |
11602 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
11603 | ||
11604 | /* Set the cursor. */ | |
0df56f4d | 11605 | row = row_containing_pos (w, PT, r0, NULL, 0); |
27d16f05 GM |
11606 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); |
11607 | return 2; | |
11608 | } | |
5f5c8ee5 GM |
11609 | } |
11610 | ||
2b9c25e0 GM |
11611 | /* Give up if window start is in the changed area. |
11612 | ||
11613 | The condition used to read | |
11614 | ||
11615 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
11616 | ||
11617 | but why that was tested escapes me at the moment. */ | |
11618 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
11619 | && CHARPOS (start) <= last_changed_charpos) |
11620 | GIVE_UP (15); | |
11621 | ||
f5376658 RS |
11622 | /* Check that window start agrees with the start of the first glyph |
11623 | row in its current matrix. Check this after we know the window | |
11624 | start is not in changed text, otherwise positions would not be | |
11625 | comparable. */ | |
27d16f05 | 11626 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 11627 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 11628 | GIVE_UP (16); |
5f5c8ee5 | 11629 | |
23e8bd86 GM |
11630 | /* Give up if the window ends in strings. Overlay strings |
11631 | at the end are difficult to handle, so don't try. */ | |
11632 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
11633 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
11634 | GIVE_UP (20); | |
11635 | ||
5f5c8ee5 GM |
11636 | /* Compute the position at which we have to start displaying new |
11637 | lines. Some of the lines at the top of the window might be | |
11638 | reusable because they are not displaying changed text. Find the | |
11639 | last row in W's current matrix not affected by changes at the | |
11640 | start of current_buffer. Value is null if changes start in the | |
11641 | first line of window. */ | |
1ec185cb | 11642 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
11643 | if (last_unchanged_at_beg_row) |
11644 | { | |
67f1cf4c GM |
11645 | /* Avoid starting to display in the moddle of a character, a TAB |
11646 | for instance. This is easier than to set up the iterator | |
11647 | exactly, and it's not a frequent case, so the additional | |
11648 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
11649 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
11650 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
11651 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
11652 | --last_unchanged_at_beg_row; | |
11653 | ||
11654 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 11655 | GIVE_UP (17); |
47d57b22 GM |
11656 | |
11657 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
11658 | GIVE_UP (18); | |
5f5c8ee5 GM |
11659 | start_pos = it.current.pos; |
11660 | ||
11661 | /* Start displaying new lines in the desired matrix at the same | |
11662 | vpos we would use in the current matrix, i.e. below | |
11663 | last_unchanged_at_beg_row. */ | |
11664 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
11665 | current_matrix); | |
11666 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
11667 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
11668 | ||
11669 | xassert (it.hpos == 0 && it.current_x == 0); | |
11670 | } | |
11671 | else | |
11672 | { | |
11673 | /* There are no reusable lines at the start of the window. | |
11674 | Start displaying in the first line. */ | |
11675 | start_display (&it, w, start); | |
11676 | start_pos = it.current.pos; | |
11677 | } | |
11678 | ||
5f5c8ee5 GM |
11679 | /* Find the first row that is not affected by changes at the end of |
11680 | the buffer. Value will be null if there is no unchanged row, in | |
11681 | which case we must redisplay to the end of the window. delta | |
11682 | will be set to the value by which buffer positions beginning with | |
11683 | first_unchanged_at_end_row have to be adjusted due to text | |
11684 | changes. */ | |
11685 | first_unchanged_at_end_row | |
1ec185cb | 11686 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
11687 | IF_DEBUG (debug_delta = delta); |
11688 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
11689 | ||
11690 | /* Set stop_pos to the buffer position up to which we will have to | |
11691 | display new lines. If first_unchanged_at_end_row != NULL, this | |
11692 | is the buffer position of the start of the line displayed in that | |
11693 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
11694 | that we don't stop at a buffer position. */ | |
11695 | stop_pos = 0; | |
11696 | if (first_unchanged_at_end_row) | |
11697 | { | |
11698 | xassert (last_unchanged_at_beg_row == NULL | |
11699 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
11700 | ||
11701 | /* If this is a continuation line, move forward to the next one | |
11702 | that isn't. Changes in lines above affect this line. | |
11703 | Caution: this may move first_unchanged_at_end_row to a row | |
11704 | not displaying text. */ | |
11705 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
11706 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
11707 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
11708 | < it.last_visible_y)) | |
11709 | ++first_unchanged_at_end_row; | |
11710 | ||
11711 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
11712 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
11713 | >= it.last_visible_y)) | |
11714 | first_unchanged_at_end_row = NULL; | |
11715 | else | |
11716 | { | |
11717 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
11718 | + delta); | |
11719 | first_unchanged_at_end_vpos | |
11720 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 11721 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
11722 | } |
11723 | } | |
11724 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 11725 | GIVE_UP (19); |
5f5c8ee5 GM |
11726 | |
11727 | ||
11728 | #if GLYPH_DEBUG | |
11729 | ||
11730 | /* Either there is no unchanged row at the end, or the one we have | |
11731 | now displays text. This is a necessary condition for the window | |
11732 | end pos calculation at the end of this function. */ | |
11733 | xassert (first_unchanged_at_end_row == NULL | |
11734 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
11735 | ||
11736 | debug_last_unchanged_at_beg_vpos | |
11737 | = (last_unchanged_at_beg_row | |
11738 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
11739 | : -1); | |
11740 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
11741 | ||
11742 | #endif /* GLYPH_DEBUG != 0 */ | |
11743 | ||
33ea6c4d | 11744 | |
5f5c8ee5 GM |
11745 | /* Display new lines. Set last_text_row to the last new line |
11746 | displayed which has text on it, i.e. might end up as being the | |
11747 | line where the window_end_vpos is. */ | |
11748 | w->cursor.vpos = -1; | |
11749 | last_text_row = NULL; | |
11750 | overlay_arrow_seen = 0; | |
11751 | while (it.current_y < it.last_visible_y | |
11752 | && !fonts_changed_p | |
11753 | && (first_unchanged_at_end_row == NULL | |
11754 | || IT_CHARPOS (it) < stop_pos)) | |
11755 | { | |
11756 | if (display_line (&it)) | |
11757 | last_text_row = it.glyph_row - 1; | |
11758 | } | |
11759 | ||
11760 | if (fonts_changed_p) | |
11761 | return -1; | |
11762 | ||
11763 | ||
11764 | /* Compute differences in buffer positions, y-positions etc. for | |
11765 | lines reused at the bottom of the window. Compute what we can | |
11766 | scroll. */ | |
ca42b2e8 GM |
11767 | if (first_unchanged_at_end_row |
11768 | /* No lines reused because we displayed everything up to the | |
11769 | bottom of the window. */ | |
11770 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
11771 | { |
11772 | dvpos = (it.vpos | |
11773 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
11774 | current_matrix)); | |
11775 | dy = it.current_y - first_unchanged_at_end_row->y; | |
11776 | run.current_y = first_unchanged_at_end_row->y; | |
11777 | run.desired_y = run.current_y + dy; | |
11778 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
11779 | } | |
11780 | else | |
ca42b2e8 GM |
11781 | { |
11782 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
11783 | first_unchanged_at_end_row = NULL; | |
11784 | } | |
5f5c8ee5 GM |
11785 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
11786 | ||
8f8ba186 | 11787 | |
5f5c8ee5 GM |
11788 | /* Find the cursor if not already found. We have to decide whether |
11789 | PT will appear on this window (it sometimes doesn't, but this is | |
11790 | not a very frequent case.) This decision has to be made before | |
11791 | the current matrix is altered. A value of cursor.vpos < 0 means | |
11792 | that PT is either in one of the lines beginning at | |
11793 | first_unchanged_at_end_row or below the window. Don't care for | |
11794 | lines that might be displayed later at the window end; as | |
11795 | mentioned, this is not a frequent case. */ | |
11796 | if (w->cursor.vpos < 0) | |
11797 | { | |
5f5c8ee5 GM |
11798 | /* Cursor in unchanged rows at the top? */ |
11799 | if (PT < CHARPOS (start_pos) | |
11800 | && last_unchanged_at_beg_row) | |
11801 | { | |
e037b9ec GM |
11802 | row = row_containing_pos (w, PT, |
11803 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 11804 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
11805 | if (row) |
11806 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
11807 | } |
11808 | ||
11809 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
11810 | else if (first_unchanged_at_end_row) | |
11811 | { | |
e037b9ec | 11812 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 11813 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 11814 | if (row) |
468155d7 GM |
11815 | set_cursor_from_row (w, row, w->current_matrix, delta, |
11816 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
11817 | } |
11818 | ||
11819 | /* Give up if cursor was not found. */ | |
11820 | if (w->cursor.vpos < 0) | |
11821 | { | |
11822 | clear_glyph_matrix (w->desired_matrix); | |
11823 | return -1; | |
11824 | } | |
11825 | } | |
11826 | ||
11827 | /* Don't let the cursor end in the scroll margins. */ | |
11828 | { | |
11829 | int this_scroll_margin, cursor_height; | |
11830 | ||
11831 | this_scroll_margin = max (0, scroll_margin); | |
11832 | this_scroll_margin = min (this_scroll_margin, | |
11833 | XFASTINT (w->height) / 4); | |
11834 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
11835 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
11836 | ||
11837 | if ((w->cursor.y < this_scroll_margin | |
11838 | && CHARPOS (start) > BEGV) | |
11839 | /* Don't take scroll margin into account at the bottom because | |
11840 | old redisplay didn't do it either. */ | |
11841 | || w->cursor.y + cursor_height > it.last_visible_y) | |
11842 | { | |
11843 | w->cursor.vpos = -1; | |
11844 | clear_glyph_matrix (w->desired_matrix); | |
11845 | return -1; | |
11846 | } | |
11847 | } | |
11848 | ||
11849 | /* Scroll the display. Do it before changing the current matrix so | |
11850 | that xterm.c doesn't get confused about where the cursor glyph is | |
11851 | found. */ | |
fa77249f | 11852 | if (dy && run.height) |
5f5c8ee5 GM |
11853 | { |
11854 | update_begin (f); | |
11855 | ||
11856 | if (FRAME_WINDOW_P (f)) | |
11857 | { | |
11858 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11859 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11860 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11861 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11862 | } |
11863 | else | |
11864 | { | |
11865 | /* Terminal frame. In this case, dvpos gives the number of | |
11866 | lines to scroll by; dvpos < 0 means scroll up. */ | |
11867 | int first_unchanged_at_end_vpos | |
11868 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
11869 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
522ed7fb GM |
11870 | int end = (XFASTINT (w->top) |
11871 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) | |
11872 | + window_internal_height (w)); | |
5f5c8ee5 GM |
11873 | |
11874 | /* Perform the operation on the screen. */ | |
11875 | if (dvpos > 0) | |
11876 | { | |
11877 | /* Scroll last_unchanged_at_beg_row to the end of the | |
11878 | window down dvpos lines. */ | |
11879 | set_terminal_window (end); | |
11880 | ||
11881 | /* On dumb terminals delete dvpos lines at the end | |
11882 | before inserting dvpos empty lines. */ | |
11883 | if (!scroll_region_ok) | |
11884 | ins_del_lines (end - dvpos, -dvpos); | |
11885 | ||
11886 | /* Insert dvpos empty lines in front of | |
11887 | last_unchanged_at_beg_row. */ | |
11888 | ins_del_lines (from, dvpos); | |
11889 | } | |
11890 | else if (dvpos < 0) | |
11891 | { | |
11892 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
11893 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
11894 | set_terminal_window (end); | |
11895 | ||
11896 | /* Delete dvpos lines in front of | |
11897 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
11898 | the cursor to the given vpos and emit |dvpos| delete | |
11899 | line sequences. */ | |
11900 | ins_del_lines (from + dvpos, dvpos); | |
11901 | ||
11902 | /* On a dumb terminal insert dvpos empty lines at the | |
11903 | end. */ | |
11904 | if (!scroll_region_ok) | |
11905 | ins_del_lines (end + dvpos, -dvpos); | |
11906 | } | |
11907 | ||
11908 | set_terminal_window (0); | |
11909 | } | |
11910 | ||
11911 | update_end (f); | |
11912 | } | |
11913 | ||
ca42b2e8 GM |
11914 | /* Shift reused rows of the current matrix to the right position. |
11915 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
11916 | text. */ | |
11917 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11918 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
11919 | if (dvpos < 0) |
11920 | { | |
11921 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
11922 | bottom_vpos, dvpos); | |
11923 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
11924 | bottom_vpos, 0); | |
11925 | } | |
11926 | else if (dvpos > 0) | |
11927 | { | |
11928 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
11929 | bottom_vpos, dvpos); | |
11930 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
11931 | first_unchanged_at_end_vpos + dvpos, 0); | |
11932 | } | |
11933 | ||
11934 | /* For frame-based redisplay, make sure that current frame and window | |
11935 | matrix are in sync with respect to glyph memory. */ | |
11936 | if (!FRAME_WINDOW_P (f)) | |
11937 | sync_frame_with_window_matrix_rows (w); | |
11938 | ||
11939 | /* Adjust buffer positions in reused rows. */ | |
11940 | if (delta) | |
f2d86d7a GM |
11941 | increment_matrix_positions (current_matrix, |
11942 | first_unchanged_at_end_vpos + dvpos, | |
11943 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
11944 | |
11945 | /* Adjust Y positions. */ | |
11946 | if (dy) | |
11947 | shift_glyph_matrix (w, current_matrix, | |
11948 | first_unchanged_at_end_vpos + dvpos, | |
11949 | bottom_vpos, dy); | |
11950 | ||
11951 | if (first_unchanged_at_end_row) | |
11952 | first_unchanged_at_end_row += dvpos; | |
11953 | ||
11954 | /* If scrolling up, there may be some lines to display at the end of | |
11955 | the window. */ | |
11956 | last_text_row_at_end = NULL; | |
11957 | if (dy < 0) | |
11958 | { | |
9c6ba6d1 GM |
11959 | /* Scrolling up can leave for example a partially visible line |
11960 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
11961 | /* Set last_row to the glyph row in the current matrix where the |
11962 | window end line is found. It has been moved up or down in | |
11963 | the matrix by dvpos. */ | |
11964 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
11965 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
11966 | ||
11967 | /* If last_row is the window end line, it should display text. */ | |
11968 | xassert (last_row->displays_text_p); | |
11969 | ||
11970 | /* If window end line was partially visible before, begin | |
11971 | displaying at that line. Otherwise begin displaying with the | |
11972 | line following it. */ | |
11973 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
11974 | { | |
11975 | init_to_row_start (&it, w, last_row); | |
11976 | it.vpos = last_vpos; | |
11977 | it.current_y = last_row->y; | |
11978 | } | |
11979 | else | |
11980 | { | |
11981 | init_to_row_end (&it, w, last_row); | |
11982 | it.vpos = 1 + last_vpos; | |
11983 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
11984 | ++last_row; | |
11985 | } | |
12adba34 | 11986 | |
23e8bd86 GM |
11987 | /* We may start in a continuation line. If so, we have to |
11988 | get the right continuation_lines_width and current_x. */ | |
11989 | it.continuation_lines_width = last_row->continuation_lines_width; | |
11990 | it.hpos = it.current_x = 0; | |
11991 | ||
11992 | /* Display the rest of the lines at the window end. */ | |
11993 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
11994 | while (it.current_y < it.last_visible_y | |
11995 | && !fonts_changed_p) | |
5f5c8ee5 | 11996 | { |
23e8bd86 GM |
11997 | /* Is it always sure that the display agrees with lines in |
11998 | the current matrix? I don't think so, so we mark rows | |
11999 | displayed invalid in the current matrix by setting their | |
12000 | enabled_p flag to zero. */ | |
12001 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
12002 | if (display_line (&it)) | |
12003 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
12004 | } |
12005 | } | |
12adba34 | 12006 | |
5f5c8ee5 GM |
12007 | /* Update window_end_pos and window_end_vpos. */ |
12008 | if (first_unchanged_at_end_row | |
12009 | && first_unchanged_at_end_row->y < it.last_visible_y | |
12010 | && !last_text_row_at_end) | |
12011 | { | |
12012 | /* Window end line if one of the preserved rows from the current | |
12013 | matrix. Set row to the last row displaying text in current | |
12014 | matrix starting at first_unchanged_at_end_row, after | |
12015 | scrolling. */ | |
12016 | xassert (first_unchanged_at_end_row->displays_text_p); | |
12017 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
12018 | first_unchanged_at_end_row); | |
12019 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
12020 | ||
ac90c44f | 12021 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 12022 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
12023 | w->window_end_vpos |
12024 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 12025 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12026 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
12027 | } |
12028 | else if (last_text_row_at_end) | |
12029 | { | |
ac90c44f GM |
12030 | w->window_end_pos |
12031 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
12032 | w->window_end_bytepos |
12033 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
12034 | w->window_end_vpos |
12035 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 12036 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12037 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
12038 | } |
12039 | else if (last_text_row) | |
12040 | { | |
12041 | /* We have displayed either to the end of the window or at the | |
12042 | end of the window, i.e. the last row with text is to be found | |
12043 | in the desired matrix. */ | |
ac90c44f GM |
12044 | w->window_end_pos |
12045 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
12046 | w->window_end_bytepos |
12047 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
12048 | w->window_end_vpos |
12049 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 12050 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
12051 | } |
12052 | else if (first_unchanged_at_end_row == NULL | |
12053 | && last_text_row == NULL | |
12054 | && last_text_row_at_end == NULL) | |
12055 | { | |
12056 | /* Displayed to end of window, but no line containing text was | |
12057 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
12058 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
12059 | int vpos = XFASTINT (w->window_end_vpos); | |
12060 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
12061 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
12062 | ||
12063 | for (row = NULL; | |
12064 | row == NULL && vpos >= first_vpos; | |
12065 | --vpos, --current_row, --desired_row) | |
12066 | { | |
12067 | if (desired_row->enabled_p) | |
12068 | { | |
12069 | if (desired_row->displays_text_p) | |
12070 | row = desired_row; | |
12071 | } | |
12072 | else if (current_row->displays_text_p) | |
12073 | row = current_row; | |
12074 | } | |
12adba34 | 12075 | |
0416532f | 12076 | xassert (row != NULL); |
d88a79d4 | 12077 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
12078 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
12079 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 12080 | xassert (w->window_end_bytepos >= 0); |
0416532f | 12081 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
12082 | } |
12083 | else | |
12084 | abort (); | |
ac90c44f | 12085 | |
8cdb267e GM |
12086 | #if 0 /* This leads to problems, for instance when the cursor is |
12087 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
12088 | /* Disable rows below what's displayed in the window. This makes |
12089 | debugging easier. */ | |
12090 | enable_glyph_matrix_rows (current_matrix, | |
12091 | XFASTINT (w->window_end_vpos) + 1, | |
12092 | bottom_vpos, 0); | |
8cdb267e | 12093 | #endif |
23e8bd86 | 12094 | |
5f5c8ee5 GM |
12095 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
12096 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 12097 | |
5f5c8ee5 GM |
12098 | /* Record that display has not been completed. */ |
12099 | w->window_end_valid = Qnil; | |
12100 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 12101 | return 3; |
27d16f05 GM |
12102 | |
12103 | #undef GIVE_UP | |
12adba34 | 12104 | } |
0f9c0ff0 | 12105 | |
a2889657 | 12106 | |
5f5c8ee5 GM |
12107 | \f |
12108 | /*********************************************************************** | |
12109 | More debugging support | |
12110 | ***********************************************************************/ | |
a2889657 | 12111 | |
5f5c8ee5 | 12112 | #if GLYPH_DEBUG |
a2889657 | 12113 | |
eaaa65b0 | 12114 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 12115 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 12116 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 12117 | |
31b24551 | 12118 | |
9ab436b9 | 12119 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 12120 | |
9ab436b9 GM |
12121 | GLYPHS 0 means don't show glyph contents. |
12122 | GLYPHS 1 means show glyphs in short form | |
12123 | GLYPHS > 1 means show glyphs in long form. */ | |
12124 | ||
12125 | void | |
12126 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 12127 | struct glyph_matrix *matrix; |
9ab436b9 | 12128 | int glyphs; |
5f5c8ee5 | 12129 | { |
efc63ef0 | 12130 | int i; |
5f5c8ee5 | 12131 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 12132 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 12133 | } |
31b24551 | 12134 | |
68a37fa8 | 12135 | |
e187cf71 GM |
12136 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
12137 | the glyph row and area where the glyph comes from. */ | |
12138 | ||
12139 | void | |
12140 | dump_glyph (row, glyph, area) | |
12141 | struct glyph_row *row; | |
12142 | struct glyph *glyph; | |
12143 | int area; | |
12144 | { | |
12145 | if (glyph->type == CHAR_GLYPH) | |
12146 | { | |
12147 | fprintf (stderr, | |
12148 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12149 | glyph - row->glyphs[TEXT_AREA], | |
12150 | 'C', | |
12151 | glyph->charpos, | |
12152 | (BUFFERP (glyph->object) | |
12153 | ? 'B' | |
12154 | : (STRINGP (glyph->object) | |
12155 | ? 'S' | |
12156 | : '-')), | |
12157 | glyph->pixel_width, | |
12158 | glyph->u.ch, | |
12159 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
12160 | ? glyph->u.ch | |
12161 | : '.'), | |
12162 | glyph->face_id, | |
12163 | glyph->left_box_line_p, | |
12164 | glyph->right_box_line_p); | |
12165 | } | |
12166 | else if (glyph->type == STRETCH_GLYPH) | |
12167 | { | |
12168 | fprintf (stderr, | |
12169 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12170 | glyph - row->glyphs[TEXT_AREA], | |
12171 | 'S', | |
12172 | glyph->charpos, | |
12173 | (BUFFERP (glyph->object) | |
12174 | ? 'B' | |
12175 | : (STRINGP (glyph->object) | |
12176 | ? 'S' | |
12177 | : '-')), | |
12178 | glyph->pixel_width, | |
12179 | 0, | |
12180 | '.', | |
12181 | glyph->face_id, | |
12182 | glyph->left_box_line_p, | |
12183 | glyph->right_box_line_p); | |
12184 | } | |
12185 | else if (glyph->type == IMAGE_GLYPH) | |
12186 | { | |
12187 | fprintf (stderr, | |
12188 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12189 | glyph - row->glyphs[TEXT_AREA], | |
12190 | 'I', | |
12191 | glyph->charpos, | |
12192 | (BUFFERP (glyph->object) | |
12193 | ? 'B' | |
12194 | : (STRINGP (glyph->object) | |
12195 | ? 'S' | |
12196 | : '-')), | |
12197 | glyph->pixel_width, | |
12198 | glyph->u.img_id, | |
12199 | '.', | |
12200 | glyph->face_id, | |
12201 | glyph->left_box_line_p, | |
12202 | glyph->right_box_line_p); | |
12203 | } | |
12204 | } | |
12205 | ||
12206 | ||
5f5c8ee5 | 12207 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
12208 | GLYPHS 0 means don't show glyph contents. |
12209 | GLYPHS 1 means show glyphs in short form | |
12210 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 12211 | |
5f5c8ee5 | 12212 | void |
eaaa65b0 GM |
12213 | dump_glyph_row (row, vpos, glyphs) |
12214 | struct glyph_row *row; | |
9ab436b9 | 12215 | int vpos, glyphs; |
5f5c8ee5 | 12216 | { |
9ab436b9 GM |
12217 | if (glyphs != 1) |
12218 | { | |
b94c0d9c | 12219 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n"); |
9ab436b9 | 12220 | fprintf (stderr, "=======================================================================\n"); |
5f5c8ee5 | 12221 | |
0ad38729 | 12222 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 12223 | %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 | 12224 | vpos, |
9ab436b9 GM |
12225 | MATRIX_ROW_START_CHARPOS (row), |
12226 | MATRIX_ROW_END_CHARPOS (row), | |
12227 | row->used[TEXT_AREA], | |
12228 | row->contains_overlapping_glyphs_p, | |
12229 | row->enabled_p, | |
9ab436b9 GM |
12230 | row->truncated_on_left_p, |
12231 | row->truncated_on_right_p, | |
12232 | row->overlay_arrow_p, | |
12233 | row->continued_p, | |
12234 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
12235 | row->displays_text_p, | |
12236 | row->ends_at_zv_p, | |
12237 | row->fill_line_p, | |
12238 | row->ends_in_middle_of_char_p, | |
12239 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 12240 | row->mouse_face_p, |
9ab436b9 GM |
12241 | row->x, |
12242 | row->y, | |
12243 | row->pixel_width, | |
12244 | row->height, | |
12245 | row->visible_height, | |
12246 | row->ascent, | |
12247 | row->phys_ascent); | |
33ea6c4d GM |
12248 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
12249 | row->end.overlay_string_index, | |
12250 | row->continuation_lines_width); | |
9ab436b9 GM |
12251 | fprintf (stderr, "%9d %5d\n", |
12252 | CHARPOS (row->start.string_pos), | |
12253 | CHARPOS (row->end.string_pos)); | |
12254 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
12255 | row->end.dpvec_index); | |
12256 | } | |
5f5c8ee5 | 12257 | |
9ab436b9 | 12258 | if (glyphs > 1) |
bd66d1ba | 12259 | { |
e187cf71 GM |
12260 | int area; |
12261 | ||
12262 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12263 | { | |
091f8878 GM |
12264 | struct glyph *glyph = row->glyphs[area]; |
12265 | struct glyph *glyph_end = glyph + row->used[area]; | |
5f5c8ee5 | 12266 | |
e187cf71 | 12267 | /* Glyph for a line end in text. */ |
091f8878 | 12268 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 12269 | ++glyph_end; |
5f5c8ee5 | 12270 | |
e187cf71 GM |
12271 | if (glyph < glyph_end) |
12272 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
5f5c8ee5 | 12273 | |
e187cf71 GM |
12274 | for (; glyph < glyph_end; ++glyph) |
12275 | dump_glyph (row, glyph, area); | |
f7b4b63a | 12276 | } |
f4faa47c | 12277 | } |
9ab436b9 GM |
12278 | else if (glyphs == 1) |
12279 | { | |
e187cf71 | 12280 | int area; |
9ab436b9 | 12281 | |
e187cf71 | 12282 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 12283 | { |
e187cf71 GM |
12284 | char *s = (char *) alloca (row->used[area] + 1); |
12285 | int i; | |
12286 | ||
12287 | for (i = 0; i < row->used[area]; ++i) | |
12288 | { | |
12289 | struct glyph *glyph = row->glyphs[area] + i; | |
12290 | if (glyph->type == CHAR_GLYPH | |
12291 | && glyph->u.ch < 0x80 | |
12292 | && glyph->u.ch >= ' ') | |
12293 | s[i] = glyph->u.ch; | |
12294 | else | |
12295 | s[i] = '.'; | |
12296 | } | |
9ab436b9 | 12297 | |
e187cf71 GM |
12298 | s[i] = '\0'; |
12299 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
12300 | } | |
9ab436b9 | 12301 | } |
5f5c8ee5 | 12302 | } |
f4faa47c | 12303 | |
a2889657 | 12304 | |
5f5c8ee5 GM |
12305 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
12306 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 12307 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
12308 | Shows contents of glyph row structures. With non-nil |
12309 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
12310 | glyphs in short form, otherwise show glyphs in long form. */) |
12311 | (glyphs) | |
9ab436b9 | 12312 | Lisp_Object glyphs; |
5f5c8ee5 GM |
12313 | { |
12314 | struct window *w = XWINDOW (selected_window); | |
12315 | struct buffer *buffer = XBUFFER (w->buffer); | |
12316 | ||
12317 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
12318 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
12319 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
12320 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
12321 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
12322 | dump_glyph_matrix (w->current_matrix, |
12323 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
12324 | return Qnil; |
12325 | } | |
1c2250c2 | 12326 | |
1fca3fae | 12327 | |
e9abc296 | 12328 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 12329 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
12330 | GLYPH 0 means don't dump glyphs. |
12331 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12332 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12333 | (row, glyphs) | |
e9abc296 | 12334 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12335 | { |
eaaa65b0 GM |
12336 | struct glyph_matrix *matrix; |
12337 | int vpos; | |
12338 | ||
b7826503 | 12339 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12340 | matrix = XWINDOW (selected_window)->current_matrix; |
12341 | vpos = XINT (row); | |
12342 | if (vpos >= 0 && vpos < matrix->nrows) | |
12343 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
12344 | vpos, | |
12345 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12346 | return Qnil; |
12347 | } | |
1fca3fae | 12348 | |
67481ae5 | 12349 | |
b94c0d9c | 12350 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 12351 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
12352 | GLYPH 0 means don't dump glyphs. |
12353 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12354 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12355 | (row, glyphs) | |
b94c0d9c | 12356 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12357 | { |
886bd6f2 | 12358 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
12359 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
12360 | int vpos; | |
12361 | ||
b7826503 | 12362 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12363 | vpos = XINT (row); |
12364 | if (vpos >= 0 && vpos < m->nrows) | |
12365 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
12366 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12367 | return Qnil; |
12368 | } | |
ca26e1c8 | 12369 | |
0f9c0ff0 | 12370 | |
62397849 | 12371 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
12372 | doc: /* Toggle tracing of redisplay. |
12373 | With ARG, turn tracing on if and only if ARG is positive. */) | |
12374 | (arg) | |
62397849 | 12375 | Lisp_Object arg; |
5f5c8ee5 | 12376 | { |
62397849 GM |
12377 | if (NILP (arg)) |
12378 | trace_redisplay_p = !trace_redisplay_p; | |
12379 | else | |
12380 | { | |
12381 | arg = Fprefix_numeric_value (arg); | |
12382 | trace_redisplay_p = XINT (arg) > 0; | |
12383 | } | |
12384 | ||
5f5c8ee5 GM |
12385 | return Qnil; |
12386 | } | |
bf9249e3 GM |
12387 | |
12388 | ||
f4a374a1 | 12389 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
7ee72033 MB |
12390 | doc: /* Like `format', but print result to stderr. */) |
12391 | (nargs, args) | |
f4a374a1 GM |
12392 | int nargs; |
12393 | Lisp_Object *args; | |
bf9249e3 | 12394 | { |
f4a374a1 GM |
12395 | Lisp_Object s = Fformat (nargs, args); |
12396 | fprintf (stderr, "%s", XSTRING (s)->data); | |
bf9249e3 GM |
12397 | return Qnil; |
12398 | } | |
5f5c8ee5 GM |
12399 | |
12400 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 12401 | |
ca26e1c8 | 12402 | |
5f5c8ee5 GM |
12403 | \f |
12404 | /*********************************************************************** | |
12405 | Building Desired Matrix Rows | |
12406 | ***********************************************************************/ | |
a2889657 | 12407 | |
5f5c8ee5 GM |
12408 | /* Return a temporary glyph row holding the glyphs of an overlay |
12409 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 12410 | |
5f5c8ee5 GM |
12411 | static struct glyph_row * |
12412 | get_overlay_arrow_glyph_row (w) | |
12413 | struct window *w; | |
12414 | { | |
12415 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
12416 | struct buffer *buffer = XBUFFER (w->buffer); | |
12417 | struct buffer *old = current_buffer; | |
12418 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
12419 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
12420 | unsigned char *arrow_end = arrow_string + arrow_len; | |
12421 | unsigned char *p; | |
12422 | struct it it; | |
12423 | int multibyte_p; | |
12424 | int n_glyphs_before; | |
12425 | ||
12426 | set_buffer_temp (buffer); | |
12427 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
12428 | it.glyph_row->used[TEXT_AREA] = 0; | |
12429 | SET_TEXT_POS (it.position, 0, 0); | |
12430 | ||
12431 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
12432 | p = arrow_string; | |
12433 | while (p < arrow_end) | |
12434 | { | |
12435 | Lisp_Object face, ilisp; | |
12436 | ||
12437 | /* Get the next character. */ | |
12438 | if (multibyte_p) | |
4fdb80f2 | 12439 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
12440 | else |
12441 | it.c = *p, it.len = 1; | |
12442 | p += it.len; | |
12443 | ||
12444 | /* Get its face. */ | |
ac90c44f | 12445 | ilisp = make_number (p - arrow_string); |
5f5c8ee5 GM |
12446 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
12447 | it.face_id = compute_char_face (f, it.c, face); | |
12448 | ||
12449 | /* Compute its width, get its glyphs. */ | |
12450 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 12451 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
12452 | PRODUCE_GLYPHS (&it); |
12453 | ||
12454 | /* If this character doesn't fit any more in the line, we have | |
12455 | to remove some glyphs. */ | |
12456 | if (it.current_x > it.last_visible_x) | |
12457 | { | |
12458 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
12459 | break; | |
12460 | } | |
12461 | } | |
12462 | ||
12463 | set_buffer_temp (old); | |
12464 | return it.glyph_row; | |
12465 | } | |
ca26e1c8 | 12466 | |
b0a0fbda | 12467 | |
5f5c8ee5 GM |
12468 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
12469 | glyphs are only inserted for terminal frames since we can't really | |
12470 | win with truncation glyphs when partially visible glyphs are | |
12471 | involved. Which glyphs to insert is determined by | |
12472 | produce_special_glyphs. */ | |
67481ae5 | 12473 | |
5f5c8ee5 GM |
12474 | static void |
12475 | insert_left_trunc_glyphs (it) | |
12476 | struct it *it; | |
12477 | { | |
12478 | struct it truncate_it; | |
12479 | struct glyph *from, *end, *to, *toend; | |
12480 | ||
12481 | xassert (!FRAME_WINDOW_P (it->f)); | |
12482 | ||
12483 | /* Get the truncation glyphs. */ | |
12484 | truncate_it = *it; | |
5f5c8ee5 GM |
12485 | truncate_it.current_x = 0; |
12486 | truncate_it.face_id = DEFAULT_FACE_ID; | |
12487 | truncate_it.glyph_row = &scratch_glyph_row; | |
12488 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
12489 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 12490 | truncate_it.object = make_number (0); |
5f5c8ee5 GM |
12491 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
12492 | ||
12493 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
12494 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12495 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
12496 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
12497 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
12498 | ||
12499 | while (from < end) | |
12500 | *to++ = *from++; | |
12501 | ||
37be86f2 KH |
12502 | /* There may be padding glyphs left over. Overwrite them too. */ |
12503 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
12504 | { | |
12505 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12506 | while (from < end) | |
12507 | *to++ = *from++; | |
12508 | } | |
5f5c8ee5 | 12509 | |
37be86f2 KH |
12510 | if (to > toend) |
12511 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 12512 | } |
e0bfbde6 | 12513 | |
e0bfbde6 | 12514 | |
5f5c8ee5 | 12515 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 12516 | |
5f5c8ee5 GM |
12517 | Most of the time, ascent and height of a display line will be equal |
12518 | to the max_ascent and max_height values of the display iterator | |
12519 | structure. This is not the case if | |
67481ae5 | 12520 | |
5f5c8ee5 GM |
12521 | 1. We hit ZV without displaying anything. In this case, max_ascent |
12522 | and max_height will be zero. | |
1c9241f5 | 12523 | |
5f5c8ee5 GM |
12524 | 2. We have some glyphs that don't contribute to the line height. |
12525 | (The glyph row flag contributes_to_line_height_p is for future | |
12526 | pixmap extensions). | |
f6fd109b | 12527 | |
5f5c8ee5 GM |
12528 | The first case is easily covered by using default values because in |
12529 | these cases, the line height does not really matter, except that it | |
12530 | must not be zero. */ | |
67481ae5 | 12531 | |
5f5c8ee5 GM |
12532 | static void |
12533 | compute_line_metrics (it) | |
12534 | struct it *it; | |
12535 | { | |
12536 | struct glyph_row *row = it->glyph_row; | |
12537 | int area, i; | |
1c2250c2 | 12538 | |
5f5c8ee5 GM |
12539 | if (FRAME_WINDOW_P (it->f)) |
12540 | { | |
75c5350a | 12541 | int i, min_y, max_y; |
1c2250c2 | 12542 | |
5f5c8ee5 GM |
12543 | /* The line may consist of one space only, that was added to |
12544 | place the cursor on it. If so, the row's height hasn't been | |
12545 | computed yet. */ | |
12546 | if (row->height == 0) | |
12547 | { | |
12548 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 12549 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
12550 | row->ascent = it->max_ascent; |
12551 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12552 | row->phys_ascent = it->max_phys_ascent; |
12553 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
12554 | } |
12555 | ||
12556 | /* Compute the width of this line. */ | |
12557 | row->pixel_width = row->x; | |
12558 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
12559 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
12560 | ||
12561 | xassert (row->pixel_width >= 0); | |
12562 | xassert (row->ascent >= 0 && row->height > 0); | |
12563 | ||
312246d1 GM |
12564 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
12565 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
12566 | ||
12567 | /* If first line's physical ascent is larger than its logical | |
12568 | ascent, use the physical ascent, and make the row taller. | |
12569 | This makes accented characters fully visible. */ | |
b28cb6ed | 12570 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
12571 | && row->phys_ascent > row->ascent) |
12572 | { | |
12573 | row->height += row->phys_ascent - row->ascent; | |
12574 | row->ascent = row->phys_ascent; | |
12575 | } | |
12576 | ||
5f5c8ee5 GM |
12577 | /* Compute how much of the line is visible. */ |
12578 | row->visible_height = row->height; | |
12579 | ||
75c5350a GM |
12580 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
12581 | max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
12582 | ||
12583 | if (row->y < min_y) | |
12584 | row->visible_height -= min_y - row->y; | |
12585 | if (row->y + row->height > max_y) | |
12586 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
12587 | } |
12588 | else | |
12589 | { | |
12590 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
12591 | if (row->continued_p) |
12592 | row->pixel_width -= it->continuation_pixel_width; | |
12593 | else if (row->truncated_on_right_p) | |
12594 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
12595 | row->ascent = row->phys_ascent = 0; |
12596 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 12597 | } |
67481ae5 | 12598 | |
5f5c8ee5 GM |
12599 | /* Compute a hash code for this row. */ |
12600 | row->hash = 0; | |
12601 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12602 | for (i = 0; i < row->used[area]; ++i) | |
12603 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
12604 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
12605 | + row->glyphs[area][i].face_id |
12606 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 12607 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 12608 | |
5f5c8ee5 | 12609 | it->max_ascent = it->max_descent = 0; |
312246d1 | 12610 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 12611 | } |
12adba34 | 12612 | |
ca26e1c8 | 12613 | |
5f5c8ee5 GM |
12614 | /* Append one space to the glyph row of iterator IT if doing a |
12615 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
12616 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 12617 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
12618 | |
12619 | This function is called to make sure that there is always one glyph | |
12620 | at the end of a glyph row that the cursor can be set on under | |
12621 | window-systems. (If there weren't such a glyph we would not know | |
12622 | how wide and tall a box cursor should be displayed). | |
12623 | ||
12624 | At the same time this space let's a nicely handle clearing to the | |
12625 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 12626 | |
80c6cb1f | 12627 | static int |
5f5c8ee5 GM |
12628 | append_space (it, default_face_p) |
12629 | struct it *it; | |
12630 | int default_face_p; | |
12631 | { | |
12632 | if (FRAME_WINDOW_P (it->f)) | |
12633 | { | |
12634 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 12635 | |
5f5c8ee5 GM |
12636 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
12637 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 12638 | { |
cafafe0b GM |
12639 | /* Save some values that must not be changed. |
12640 | Must save IT->c and IT->len because otherwise | |
12641 | ITERATOR_AT_END_P wouldn't work anymore after | |
12642 | append_space has been called. */ | |
478d746b | 12643 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
12644 | int saved_c = it->c, saved_len = it->len; |
12645 | int saved_x = it->current_x; | |
5f5c8ee5 | 12646 | int saved_face_id = it->face_id; |
cafafe0b | 12647 | struct text_pos saved_pos; |
5f5c8ee5 | 12648 | Lisp_Object saved_object; |
980806b6 | 12649 | struct face *face; |
5f5c8ee5 GM |
12650 | |
12651 | saved_object = it->object; | |
12652 | saved_pos = it->position; | |
12653 | ||
12654 | it->what = IT_CHARACTER; | |
12655 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12656 | it->object = make_number (0); |
5f5c8ee5 GM |
12657 | it->c = ' '; |
12658 | it->len = 1; | |
5f5c8ee5 GM |
12659 | |
12660 | if (default_face_p) | |
12661 | it->face_id = DEFAULT_FACE_ID; | |
4aad61f8 GM |
12662 | else if (it->face_before_selective_p) |
12663 | it->face_id = it->saved_face_id; | |
980806b6 KH |
12664 | face = FACE_FROM_ID (it->f, it->face_id); |
12665 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 12666 | |
5f5c8ee5 GM |
12667 | PRODUCE_GLYPHS (it); |
12668 | ||
12669 | it->current_x = saved_x; | |
12670 | it->object = saved_object; | |
12671 | it->position = saved_pos; | |
12672 | it->what = saved_what; | |
12673 | it->face_id = saved_face_id; | |
cafafe0b GM |
12674 | it->len = saved_len; |
12675 | it->c = saved_c; | |
80c6cb1f | 12676 | return 1; |
5f5c8ee5 GM |
12677 | } |
12678 | } | |
80c6cb1f GM |
12679 | |
12680 | return 0; | |
5f5c8ee5 | 12681 | } |
12adba34 | 12682 | |
1842fc1a | 12683 | |
5f5c8ee5 GM |
12684 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
12685 | to the end of the display line. Called from display_line. | |
12686 | If the glyph row is empty, add a space glyph to it so that we | |
12687 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
12688 | ||
12689 | static void | |
12690 | extend_face_to_end_of_line (it) | |
12691 | struct it *it; | |
12692 | { | |
12693 | struct face *face; | |
12694 | struct frame *f = it->f; | |
1842fc1a | 12695 | |
5f5c8ee5 GM |
12696 | /* If line is already filled, do nothing. */ |
12697 | if (it->current_x >= it->last_visible_x) | |
12698 | return; | |
12699 | ||
12700 | /* Face extension extends the background and box of IT->face_id | |
12701 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
12702 | of the frame, we don't have to do anything. */ |
12703 | if (it->face_before_selective_p) | |
12704 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
12705 | else | |
12706 | face = FACE_FROM_ID (f, it->face_id); | |
12707 | ||
5f5c8ee5 GM |
12708 | if (FRAME_WINDOW_P (f) |
12709 | && face->box == FACE_NO_BOX | |
12710 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
12711 | && !face->stipple) | |
12712 | return; | |
1842fc1a | 12713 | |
5f5c8ee5 GM |
12714 | /* Set the glyph row flag indicating that the face of the last glyph |
12715 | in the text area has to be drawn to the end of the text area. */ | |
12716 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 12717 | |
980806b6 KH |
12718 | /* If current character of IT is not ASCII, make sure we have the |
12719 | ASCII face. This will be automatically undone the next time | |
12720 | get_next_display_element returns a multibyte character. Note | |
12721 | that the character will always be single byte in unibyte text. */ | |
12722 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 12723 | { |
980806b6 | 12724 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 12725 | } |
545e04f6 | 12726 | |
5f5c8ee5 GM |
12727 | if (FRAME_WINDOW_P (f)) |
12728 | { | |
12729 | /* If the row is empty, add a space with the current face of IT, | |
12730 | so that we know which face to draw. */ | |
12731 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 12732 | { |
5f5c8ee5 | 12733 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 12734 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 12735 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 12736 | } |
5f5c8ee5 GM |
12737 | } |
12738 | else | |
12739 | { | |
12740 | /* Save some values that must not be changed. */ | |
12741 | int saved_x = it->current_x; | |
12742 | struct text_pos saved_pos; | |
12743 | Lisp_Object saved_object; | |
478d746b | 12744 | enum display_element_type saved_what = it->what; |
4aad61f8 | 12745 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
12746 | |
12747 | saved_object = it->object; | |
12748 | saved_pos = it->position; | |
12749 | ||
12750 | it->what = IT_CHARACTER; | |
12751 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12752 | it->object = make_number (0); |
5f5c8ee5 GM |
12753 | it->c = ' '; |
12754 | it->len = 1; | |
4aad61f8 | 12755 | it->face_id = face->id; |
5f5c8ee5 GM |
12756 | |
12757 | PRODUCE_GLYPHS (it); | |
12758 | ||
12759 | while (it->current_x <= it->last_visible_x) | |
12760 | PRODUCE_GLYPHS (it); | |
12761 | ||
12762 | /* Don't count these blanks really. It would let us insert a left | |
12763 | truncation glyph below and make us set the cursor on them, maybe. */ | |
12764 | it->current_x = saved_x; | |
12765 | it->object = saved_object; | |
12766 | it->position = saved_pos; | |
12767 | it->what = saved_what; | |
4aad61f8 | 12768 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
12769 | } |
12770 | } | |
12adba34 | 12771 | |
545e04f6 | 12772 | |
5f5c8ee5 GM |
12773 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
12774 | trailing whitespace. */ | |
1c9241f5 | 12775 | |
5f5c8ee5 GM |
12776 | static int |
12777 | trailing_whitespace_p (charpos) | |
12778 | int charpos; | |
12779 | { | |
12780 | int bytepos = CHAR_TO_BYTE (charpos); | |
12781 | int c = 0; | |
7bbe686f | 12782 | |
5f5c8ee5 GM |
12783 | while (bytepos < ZV_BYTE |
12784 | && (c = FETCH_CHAR (bytepos), | |
12785 | c == ' ' || c == '\t')) | |
12786 | ++bytepos; | |
0d09d1e6 | 12787 | |
8f897821 GM |
12788 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
12789 | { | |
12790 | if (bytepos != PT_BYTE) | |
12791 | return 1; | |
12792 | } | |
12793 | return 0; | |
5f5c8ee5 | 12794 | } |
31b24551 | 12795 | |
545e04f6 | 12796 | |
5f5c8ee5 | 12797 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 12798 | |
5f5c8ee5 GM |
12799 | void |
12800 | highlight_trailing_whitespace (f, row) | |
12801 | struct frame *f; | |
12802 | struct glyph_row *row; | |
12803 | { | |
12804 | int used = row->used[TEXT_AREA]; | |
12805 | ||
12806 | if (used) | |
12807 | { | |
12808 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
12809 | struct glyph *glyph = start + used - 1; | |
12810 | ||
ade0bee1 GM |
12811 | /* Skip over glyphs inserted to display the cursor at the |
12812 | end of a line, for extending the face of the last glyph | |
12813 | to the end of the line on terminals, and for truncation | |
12814 | and continuation glyphs. */ | |
65008712 GM |
12815 | while (glyph >= start |
12816 | && glyph->type == CHAR_GLYPH | |
65008712 | 12817 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
12818 | --glyph; |
12819 | ||
12820 | /* If last glyph is a space or stretch, and it's trailing | |
12821 | whitespace, set the face of all trailing whitespace glyphs in | |
12822 | IT->glyph_row to `trailing-whitespace'. */ | |
12823 | if (glyph >= start | |
12824 | && BUFFERP (glyph->object) | |
12825 | && (glyph->type == STRETCH_GLYPH | |
12826 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 12827 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 12828 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 12829 | { |
980806b6 | 12830 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
5f5c8ee5 GM |
12831 | |
12832 | while (glyph >= start | |
12833 | && BUFFERP (glyph->object) | |
12834 | && (glyph->type == STRETCH_GLYPH | |
12835 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
12836 | && glyph->u.ch == ' '))) |
12837 | (glyph--)->face_id = face_id; | |
545e04f6 | 12838 | } |
a2889657 | 12839 | } |
5f5c8ee5 | 12840 | } |
a2889657 | 12841 | |
5fcbb24d | 12842 | |
cafafe0b | 12843 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 12844 | used to hold the cursor. */ |
cafafe0b GM |
12845 | |
12846 | static int | |
12847 | cursor_row_p (w, row) | |
12848 | struct window *w; | |
12849 | struct glyph_row *row; | |
12850 | { | |
9a038881 GM |
12851 | int cursor_row_p = 1; |
12852 | ||
cafafe0b GM |
12853 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
12854 | { | |
9a038881 GM |
12855 | /* If the row ends with a newline from a string, we don't want |
12856 | the cursor there (if the row is continued it doesn't end in a | |
12857 | newline). */ | |
12858 | if (CHARPOS (row->end.string_pos) >= 0 | |
12859 | || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
12860 | cursor_row_p = row->continued_p; | |
12861 | ||
12862 | /* If the row ends at ZV, display the cursor at the end of that | |
12863 | row instead of at the start of the row below. */ | |
12864 | else if (row->ends_at_zv_p) | |
12865 | cursor_row_p = 1; | |
12866 | else | |
12867 | cursor_row_p = 0; | |
cafafe0b GM |
12868 | } |
12869 | ||
9a038881 | 12870 | return cursor_row_p; |
cafafe0b GM |
12871 | } |
12872 | ||
12873 | ||
5f5c8ee5 GM |
12874 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
12875 | IT->w from text at the current position of IT. See dispextern.h | |
12876 | for an overview of struct it. Value is non-zero if | |
12877 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
12878 | only. */ | |
12879 | ||
12880 | static int | |
12881 | display_line (it) | |
12882 | struct it *it; | |
12883 | { | |
12884 | struct glyph_row *row = it->glyph_row; | |
12885 | ||
12886 | /* We always start displaying at hpos zero even if hscrolled. */ | |
12887 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 12888 | |
5f5c8ee5 GM |
12889 | /* We must not display in a row that's not a text row. */ |
12890 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
12891 | < it->w->desired_matrix->nrows); | |
12adba34 | 12892 | |
5f5c8ee5 GM |
12893 | /* Is IT->w showing the region? */ |
12894 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 12895 | |
5f5c8ee5 GM |
12896 | /* Clear the result glyph row and enable it. */ |
12897 | prepare_desired_row (row); | |
12adba34 | 12898 | |
5f5c8ee5 GM |
12899 | row->y = it->current_y; |
12900 | row->start = it->current; | |
12901 | row->continuation_lines_width = it->continuation_lines_width; | |
12902 | row->displays_text_p = 1; | |
91004049 GM |
12903 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
12904 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
12905 | |
12906 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
12907 | display_line on only one line at a time, in which case this | |
12908 | can't really hurt too much, or we call it on lines which appear | |
12909 | one after another in the buffer, in which case all calls to | |
12910 | recenter_overlay_lists but the first will be pretty cheap. */ | |
12911 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
12912 | ||
5f5c8ee5 GM |
12913 | /* Move over display elements that are not visible because we are |
12914 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
12915 | if the first glyph is partially visible or if we hit a line end. */ | |
12916 | if (it->current_x < it->first_visible_x) | |
12917 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
12918 | MOVE_TO_POS | MOVE_TO_X); | |
12919 | ||
12920 | /* Get the initial row height. This is either the height of the | |
12921 | text hscrolled, if there is any, or zero. */ | |
12922 | row->ascent = it->max_ascent; | |
12923 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12924 | row->phys_ascent = it->max_phys_ascent; |
12925 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
12926 | |
12927 | /* Loop generating characters. The loop is left with IT on the next | |
12928 | character to display. */ | |
12929 | while (1) | |
12930 | { | |
12931 | int n_glyphs_before, hpos_before, x_before; | |
12932 | int x, i, nglyphs; | |
ae26e27d | 12933 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 12934 | |
5f5c8ee5 GM |
12935 | /* Retrieve the next thing to display. Value is zero if end of |
12936 | buffer reached. */ | |
12937 | if (!get_next_display_element (it)) | |
12938 | { | |
12939 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
12940 | display the cursor there under X. Set the charpos of the |
12941 | first glyph of blank lines not corresponding to any text | |
12942 | to -1. */ | |
12943 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
12944 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 12945 | { |
5f5c8ee5 GM |
12946 | row->glyphs[TEXT_AREA]->charpos = -1; |
12947 | row->displays_text_p = 0; | |
12948 | ||
2ad551af | 12949 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
12950 | && (!MINI_WINDOW_P (it->w) |
12951 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 12952 | row->indicate_empty_line_p = 1; |
a2889657 | 12953 | } |
5f5c8ee5 GM |
12954 | |
12955 | it->continuation_lines_width = 0; | |
12956 | row->ends_at_zv_p = 1; | |
12957 | break; | |
a2889657 | 12958 | } |
a2889657 | 12959 | |
5f5c8ee5 GM |
12960 | /* Now, get the metrics of what we want to display. This also |
12961 | generates glyphs in `row' (which is IT->glyph_row). */ | |
12962 | n_glyphs_before = row->used[TEXT_AREA]; | |
12963 | x = it->current_x; | |
e6819faf GM |
12964 | |
12965 | /* Remember the line height so far in case the next element doesn't | |
12966 | fit on the line. */ | |
12967 | if (!it->truncate_lines_p) | |
12968 | { | |
12969 | ascent = it->max_ascent; | |
12970 | descent = it->max_descent; | |
12971 | phys_ascent = it->max_phys_ascent; | |
12972 | phys_descent = it->max_phys_descent; | |
12973 | } | |
12974 | ||
5f5c8ee5 | 12975 | PRODUCE_GLYPHS (it); |
a2889657 | 12976 | |
5f5c8ee5 GM |
12977 | /* If this display element was in marginal areas, continue with |
12978 | the next one. */ | |
12979 | if (it->area != TEXT_AREA) | |
a2889657 | 12980 | { |
5f5c8ee5 GM |
12981 | row->ascent = max (row->ascent, it->max_ascent); |
12982 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12983 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12984 | row->phys_height = max (row->phys_height, | |
12985 | it->max_phys_ascent + it->max_phys_descent); | |
cafafe0b | 12986 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
12987 | continue; |
12988 | } | |
5936754e | 12989 | |
5f5c8ee5 GM |
12990 | /* Does the display element fit on the line? If we truncate |
12991 | lines, we should draw past the right edge of the window. If | |
12992 | we don't truncate, we want to stop so that we can display the | |
12993 | continuation glyph before the right margin. If lines are | |
12994 | continued, there are two possible strategies for characters | |
12995 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
12996 | glyphs as possible in this line and leave the rest for the | |
12997 | continuation line, or display the whole element in the next | |
12998 | line. Original redisplay did the former, so we do it also. */ | |
12999 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
13000 | hpos_before = it->hpos; | |
13001 | x_before = x; | |
4dcd74e6 | 13002 | |
4b41cebb | 13003 | if (/* Not a newline. */ |
4dcd74e6 | 13004 | nglyphs > 0 |
202c1b5b | 13005 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
13006 | && it->current_x < it->last_visible_x) |
13007 | { | |
37be86f2 | 13008 | it->hpos += nglyphs; |
5f5c8ee5 GM |
13009 | row->ascent = max (row->ascent, it->max_ascent); |
13010 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13011 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13012 | row->phys_height = max (row->phys_height, | |
13013 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13014 | if (it->current_x - it->pixel_width < it->first_visible_x) |
13015 | row->x = x - it->first_visible_x; | |
13016 | } | |
13017 | else | |
13018 | { | |
13019 | int new_x; | |
13020 | struct glyph *glyph; | |
13021 | ||
13022 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 13023 | { |
5f5c8ee5 GM |
13024 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
13025 | new_x = x + glyph->pixel_width; | |
13026 | ||
13027 | if (/* Lines are continued. */ | |
13028 | !it->truncate_lines_p | |
13029 | && (/* Glyph doesn't fit on the line. */ | |
13030 | new_x > it->last_visible_x | |
13031 | /* Or it fits exactly on a window system frame. */ | |
13032 | || (new_x == it->last_visible_x | |
13033 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 13034 | { |
5f5c8ee5 GM |
13035 | /* End of a continued line. */ |
13036 | ||
13037 | if (it->hpos == 0 | |
13038 | || (new_x == it->last_visible_x | |
13039 | && FRAME_WINDOW_P (it->f))) | |
13040 | { | |
e6819faf GM |
13041 | /* Current glyph is the only one on the line or |
13042 | fits exactly on the line. We must continue | |
13043 | the line because we can't draw the cursor | |
13044 | after the glyph. */ | |
5f5c8ee5 GM |
13045 | row->continued_p = 1; |
13046 | it->current_x = new_x; | |
13047 | it->continuation_lines_width += new_x; | |
13048 | ++it->hpos; | |
13049 | if (i == nglyphs - 1) | |
cafafe0b | 13050 | set_iterator_to_next (it, 1); |
5f5c8ee5 | 13051 | } |
3b3c4bf0 GM |
13052 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
13053 | && !FRAME_WINDOW_P (it->f)) | |
13054 | { | |
13055 | /* A padding glyph that doesn't fit on this line. | |
13056 | This means the whole character doesn't fit | |
13057 | on the line. */ | |
13058 | row->used[TEXT_AREA] = n_glyphs_before; | |
13059 | ||
13060 | /* Fill the rest of the row with continuation | |
13061 | glyphs like in 20.x. */ | |
13062 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
13063 | < row->glyphs[1 + TEXT_AREA]) | |
13064 | produce_special_glyphs (it, IT_CONTINUATION); | |
13065 | ||
13066 | row->continued_p = 1; | |
13067 | it->current_x = x_before; | |
13068 | it->continuation_lines_width += x_before; | |
13069 | ||
13070 | /* Restore the height to what it was before the | |
13071 | element not fitting on the line. */ | |
13072 | it->max_ascent = ascent; | |
13073 | it->max_descent = descent; | |
13074 | it->max_phys_ascent = phys_ascent; | |
13075 | it->max_phys_descent = phys_descent; | |
13076 | } | |
0df56f4d GM |
13077 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
13078 | { | |
13079 | /* A TAB that extends past the right edge of the | |
13080 | window. This produces a single glyph on | |
13081 | window system frames. We leave the glyph in | |
13082 | this row and let it fill the row, but don't | |
13083 | consume the TAB. */ | |
13084 | it->continuation_lines_width += it->last_visible_x; | |
13085 | row->ends_in_middle_of_char_p = 1; | |
13086 | row->continued_p = 1; | |
13087 | glyph->pixel_width = it->last_visible_x - x; | |
13088 | it->starts_in_middle_of_char_p = 1; | |
13089 | } | |
5f5c8ee5 | 13090 | else |
5936754e | 13091 | { |
0df56f4d GM |
13092 | /* Something other than a TAB that draws past |
13093 | the right edge of the window. Restore | |
13094 | positions to values before the element. */ | |
5f5c8ee5 GM |
13095 | row->used[TEXT_AREA] = n_glyphs_before + i; |
13096 | ||
13097 | /* Display continuation glyphs. */ | |
13098 | if (!FRAME_WINDOW_P (it->f)) | |
13099 | produce_special_glyphs (it, IT_CONTINUATION); | |
13100 | row->continued_p = 1; | |
653c329b | 13101 | |
0df56f4d | 13102 | it->continuation_lines_width += x; |
5f5c8ee5 | 13103 | |
91004049 GM |
13104 | if (nglyphs > 1 && i > 0) |
13105 | { | |
13106 | row->ends_in_middle_of_char_p = 1; | |
13107 | it->starts_in_middle_of_char_p = 1; | |
13108 | } | |
e6819faf GM |
13109 | |
13110 | /* Restore the height to what it was before the | |
13111 | element not fitting on the line. */ | |
13112 | it->max_ascent = ascent; | |
13113 | it->max_descent = descent; | |
13114 | it->max_phys_ascent = phys_ascent; | |
13115 | it->max_phys_descent = phys_descent; | |
5936754e | 13116 | } |
e6819faf | 13117 | |
5f5c8ee5 GM |
13118 | break; |
13119 | } | |
13120 | else if (new_x > it->first_visible_x) | |
13121 | { | |
13122 | /* Increment number of glyphs actually displayed. */ | |
13123 | ++it->hpos; | |
13124 | ||
13125 | if (x < it->first_visible_x) | |
13126 | /* Glyph is partially visible, i.e. row starts at | |
13127 | negative X position. */ | |
13128 | row->x = x - it->first_visible_x; | |
13129 | } | |
13130 | else | |
13131 | { | |
13132 | /* Glyph is completely off the left margin of the | |
13133 | window. This should not happen because of the | |
13134 | move_it_in_display_line at the start of | |
13135 | this function. */ | |
13136 | abort (); | |
a2889657 | 13137 | } |
a2889657 | 13138 | } |
5f5c8ee5 GM |
13139 | |
13140 | row->ascent = max (row->ascent, it->max_ascent); | |
13141 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13142 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13143 | row->phys_height = max (row->phys_height, | |
13144 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13145 | |
13146 | /* End of this display line if row is continued. */ | |
13147 | if (row->continued_p) | |
13148 | break; | |
a2889657 | 13149 | } |
a2889657 | 13150 | |
5f5c8ee5 GM |
13151 | /* Is this a line end? If yes, we're also done, after making |
13152 | sure that a non-default face is extended up to the right | |
13153 | margin of the window. */ | |
13154 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 13155 | { |
5f5c8ee5 GM |
13156 | int used_before = row->used[TEXT_AREA]; |
13157 | ||
e74fb0f7 GM |
13158 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
13159 | ||
5f5c8ee5 GM |
13160 | /* Add a space at the end of the line that is used to |
13161 | display the cursor there. */ | |
13162 | append_space (it, 0); | |
13163 | ||
13164 | /* Extend the face to the end of the line. */ | |
13165 | extend_face_to_end_of_line (it); | |
13166 | ||
13167 | /* Make sure we have the position. */ | |
13168 | if (used_before == 0) | |
13169 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
13170 | ||
13171 | /* Consume the line end. This skips over invisible lines. */ | |
cafafe0b | 13172 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13173 | it->continuation_lines_width = 0; |
13174 | break; | |
1c9241f5 | 13175 | } |
a2889657 | 13176 | |
5f5c8ee5 GM |
13177 | /* Proceed with next display element. Note that this skips |
13178 | over lines invisible because of selective display. */ | |
cafafe0b | 13179 | set_iterator_to_next (it, 1); |
b1d1124b | 13180 | |
5f5c8ee5 GM |
13181 | /* If we truncate lines, we are done when the last displayed |
13182 | glyphs reach past the right margin of the window. */ | |
13183 | if (it->truncate_lines_p | |
13184 | && (FRAME_WINDOW_P (it->f) | |
13185 | ? (it->current_x >= it->last_visible_x) | |
13186 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 13187 | { |
5f5c8ee5 GM |
13188 | /* Maybe add truncation glyphs. */ |
13189 | if (!FRAME_WINDOW_P (it->f)) | |
13190 | { | |
a98b5ed9 GM |
13191 | int i, n; |
13192 | ||
13193 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) | |
13194 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
13195 | break; | |
13196 | ||
13197 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
13198 | { | |
13199 | row->used[TEXT_AREA] = i; | |
13200 | produce_special_glyphs (it, IT_TRUNCATION); | |
13201 | } | |
5f5c8ee5 GM |
13202 | } |
13203 | ||
13204 | row->truncated_on_right_p = 1; | |
13205 | it->continuation_lines_width = 0; | |
312246d1 | 13206 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
13207 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
13208 | it->hpos = hpos_before; | |
13209 | it->current_x = x_before; | |
13210 | break; | |
75d13c64 | 13211 | } |
a2889657 | 13212 | } |
a2889657 | 13213 | |
5f5c8ee5 GM |
13214 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
13215 | at the left window margin. */ | |
13216 | if (it->first_visible_x | |
13217 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
13218 | { | |
13219 | if (!FRAME_WINDOW_P (it->f)) | |
13220 | insert_left_trunc_glyphs (it); | |
13221 | row->truncated_on_left_p = 1; | |
13222 | } | |
a2889657 | 13223 | |
5f5c8ee5 GM |
13224 | /* If the start of this line is the overlay arrow-position, then |
13225 | mark this glyph row as the one containing the overlay arrow. | |
13226 | This is clearly a mess with variable size fonts. It would be | |
13227 | better to let it be displayed like cursors under X. */ | |
e24c997d | 13228 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 13229 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
13230 | && (MATRIX_ROW_START_CHARPOS (row) |
13231 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 13232 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
13233 | && ! overlay_arrow_seen) |
13234 | { | |
b46952ae | 13235 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
5f5c8ee5 | 13236 | if (!FRAME_WINDOW_P (it->f)) |
c4628384 | 13237 | { |
5f5c8ee5 GM |
13238 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
13239 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
13240 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
13241 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
13242 | struct glyph *p2, *end; | |
13243 | ||
13244 | /* Copy the arrow glyphs. */ | |
13245 | while (glyph < arrow_end) | |
13246 | *p++ = *glyph++; | |
13247 | ||
13248 | /* Throw away padding glyphs. */ | |
13249 | p2 = p; | |
13250 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
13251 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
13252 | ++p2; | |
13253 | if (p2 > p) | |
212e4f87 | 13254 | { |
5f5c8ee5 GM |
13255 | while (p2 < end) |
13256 | *p++ = *p2++; | |
13257 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 13258 | } |
c4628384 | 13259 | } |
5f5c8ee5 | 13260 | |
a2889657 | 13261 | overlay_arrow_seen = 1; |
5f5c8ee5 | 13262 | row->overlay_arrow_p = 1; |
a2889657 JB |
13263 | } |
13264 | ||
5f5c8ee5 GM |
13265 | /* Compute pixel dimensions of this line. */ |
13266 | compute_line_metrics (it); | |
13267 | ||
13268 | /* Remember the position at which this line ends. */ | |
13269 | row->end = it->current; | |
13270 | ||
173cbca8 | 13271 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
13272 | if (it->w->cursor.vpos < 0 |
13273 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
13274 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
13275 | && cursor_row_p (it->w, row)) | |
13276 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
13277 | |
13278 | /* Highlight trailing whitespace. */ | |
8f897821 | 13279 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
13280 | highlight_trailing_whitespace (it->f, it->glyph_row); |
13281 | ||
13282 | /* Prepare for the next line. This line starts horizontally at (X | |
13283 | HPOS) = (0 0). Vertical positions are incremented. As a | |
13284 | convenience for the caller, IT->glyph_row is set to the next | |
13285 | row to be used. */ | |
13286 | it->current_x = it->hpos = 0; | |
13287 | it->current_y += row->height; | |
13288 | ++it->vpos; | |
13289 | ++it->glyph_row; | |
13290 | return row->displays_text_p; | |
a2889657 | 13291 | } |
5f5c8ee5 GM |
13292 | |
13293 | ||
a2889657 | 13294 | \f |
5f5c8ee5 GM |
13295 | /*********************************************************************** |
13296 | Menu Bar | |
13297 | ***********************************************************************/ | |
13298 | ||
13299 | /* Redisplay the menu bar in the frame for window W. | |
13300 | ||
13301 | The menu bar of X frames that don't have X toolkit support is | |
13302 | displayed in a special window W->frame->menu_bar_window. | |
13303 | ||
13304 | The menu bar of terminal frames is treated specially as far as | |
13305 | glyph matrices are concerned. Menu bar lines are not part of | |
13306 | windows, so the update is done directly on the frame matrix rows | |
13307 | for the menu bar. */ | |
7ce2c095 RS |
13308 | |
13309 | static void | |
13310 | display_menu_bar (w) | |
13311 | struct window *w; | |
13312 | { | |
5f5c8ee5 GM |
13313 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
13314 | struct it it; | |
13315 | Lisp_Object items; | |
8351baf2 | 13316 | int i; |
7ce2c095 | 13317 | |
5f5c8ee5 | 13318 | /* Don't do all this for graphical frames. */ |
dc937613 | 13319 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
13320 | if (!NILP (Vwindow_system)) |
13321 | return; | |
dc937613 | 13322 | #endif |
dc937613 | 13323 | #ifdef USE_X_TOOLKIT |
d3413a53 | 13324 | if (FRAME_X_P (f)) |
7ce2c095 | 13325 | return; |
5f5c8ee5 | 13326 | #endif |
1a578e9b AC |
13327 | #ifdef macintosh |
13328 | if (FRAME_MAC_P (f)) | |
13329 | return; | |
13330 | #endif | |
5f5c8ee5 GM |
13331 | |
13332 | #ifdef USE_X_TOOLKIT | |
13333 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 13334 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
13335 | it.first_visible_x = 0; |
13336 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13337 | #else /* not USE_X_TOOLKIT */ | |
13338 | if (FRAME_WINDOW_P (f)) | |
13339 | { | |
13340 | /* Menu bar lines are displayed in the desired matrix of the | |
13341 | dummy window menu_bar_window. */ | |
13342 | struct window *menu_w; | |
13343 | xassert (WINDOWP (f->menu_bar_window)); | |
13344 | menu_w = XWINDOW (f->menu_bar_window); | |
13345 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 13346 | MENU_FACE_ID); |
5f5c8ee5 GM |
13347 | it.first_visible_x = 0; |
13348 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13349 | } | |
13350 | else | |
13351 | { | |
13352 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
13353 | pixel x/y. */ | |
13354 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 13355 | MENU_FACE_ID); |
5f5c8ee5 GM |
13356 | it.first_visible_x = 0; |
13357 | it.last_visible_x = FRAME_WIDTH (f); | |
13358 | } | |
13359 | #endif /* not USE_X_TOOLKIT */ | |
13360 | ||
1862a24e MB |
13361 | if (! mode_line_inverse_video) |
13362 | /* Force the menu-bar to be displayed in the default face. */ | |
13363 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13364 | ||
5f5c8ee5 GM |
13365 | /* Clear all rows of the menu bar. */ |
13366 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
13367 | { | |
13368 | struct glyph_row *row = it.glyph_row + i; | |
13369 | clear_glyph_row (row); | |
13370 | row->enabled_p = 1; | |
13371 | row->full_width_p = 1; | |
13372 | } | |
7ce2c095 | 13373 | |
5f5c8ee5 GM |
13374 | /* Display all items of the menu bar. */ |
13375 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 13376 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 13377 | { |
5f5c8ee5 GM |
13378 | Lisp_Object string; |
13379 | ||
13380 | /* Stop at nil string. */ | |
a61b7058 | 13381 | string = AREF (items, i + 1); |
8351baf2 RS |
13382 | if (NILP (string)) |
13383 | break; | |
2d66ad19 | 13384 | |
5f5c8ee5 | 13385 | /* Remember where item was displayed. */ |
a61b7058 | 13386 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 13387 | |
5f5c8ee5 GM |
13388 | /* Display the item, pad with one space. */ |
13389 | if (it.current_x < it.last_visible_x) | |
13390 | display_string (NULL, string, Qnil, 0, 0, &it, | |
13391 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
13392 | } |
13393 | ||
2d66ad19 | 13394 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
13395 | if (it.current_x < it.last_visible_x) |
13396 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 13397 | |
5f5c8ee5 GM |
13398 | /* Compute the total height of the lines. */ |
13399 | compute_line_metrics (&it); | |
7ce2c095 | 13400 | } |
5f5c8ee5 GM |
13401 | |
13402 | ||
7ce2c095 | 13403 | \f |
5f5c8ee5 GM |
13404 | /*********************************************************************** |
13405 | Mode Line | |
13406 | ***********************************************************************/ | |
13407 | ||
715e84c9 GM |
13408 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
13409 | FORCE is non-zero, redisplay mode lines unconditionally. | |
13410 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
13411 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 13412 | |
715e84c9 GM |
13413 | static int |
13414 | redisplay_mode_lines (window, force) | |
13415 | Lisp_Object window; | |
13416 | int force; | |
13417 | { | |
13418 | int nwindows = 0; | |
13419 | ||
13420 | while (!NILP (window)) | |
13421 | { | |
13422 | struct window *w = XWINDOW (window); | |
13423 | ||
13424 | if (WINDOWP (w->hchild)) | |
13425 | nwindows += redisplay_mode_lines (w->hchild, force); | |
13426 | else if (WINDOWP (w->vchild)) | |
13427 | nwindows += redisplay_mode_lines (w->vchild, force); | |
13428 | else if (force | |
13429 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
13430 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
13431 | { | |
715e84c9 GM |
13432 | struct text_pos lpoint; |
13433 | struct buffer *old = current_buffer; | |
13434 | ||
13435 | /* Set the window's buffer for the mode line display. */ | |
13436 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
13437 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
13438 | ||
13439 | /* Point refers normally to the selected window. For any | |
13440 | other window, set up appropriate value. */ | |
13441 | if (!EQ (window, selected_window)) | |
13442 | { | |
13443 | struct text_pos pt; | |
13444 | ||
13445 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); | |
13446 | if (CHARPOS (pt) < BEGV) | |
13447 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
13448 | else if (CHARPOS (pt) > (ZV - 1)) | |
13449 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
13450 | else | |
13451 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
13452 | } | |
13453 | ||
715e84c9 GM |
13454 | /* Display mode lines. */ |
13455 | clear_glyph_matrix (w->desired_matrix); | |
13456 | if (display_mode_lines (w)) | |
13457 | { | |
13458 | ++nwindows; | |
13459 | w->must_be_updated_p = 1; | |
13460 | } | |
13461 | ||
13462 | /* Restore old settings. */ | |
715e84c9 GM |
13463 | set_buffer_internal_1 (old); |
13464 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
13465 | } | |
13466 | ||
13467 | window = w->next; | |
13468 | } | |
13469 | ||
13470 | return nwindows; | |
13471 | } | |
13472 | ||
13473 | ||
13474 | /* Display the mode and/or top line of window W. Value is the number | |
13475 | of mode lines displayed. */ | |
13476 | ||
13477 | static int | |
5f5c8ee5 | 13478 | display_mode_lines (w) |
a2889657 JB |
13479 | struct window *w; |
13480 | { | |
edd1e654 | 13481 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 13482 | int n = 0; |
edd1e654 GM |
13483 | |
13484 | old_selected_frame = selected_frame; | |
13485 | selected_frame = w->frame; | |
13486 | old_selected_window = selected_window; | |
13487 | XSETWINDOW (selected_window, w); | |
715e84c9 | 13488 | |
5f5c8ee5 | 13489 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 13490 | line_number_displayed = 0; |
155ef550 | 13491 | w->column_number_displayed = Qnil; |
aa6d10fa | 13492 | |
5f5c8ee5 | 13493 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 | 13494 | { |
c96e83bf | 13495 | struct window *sel_w = XWINDOW (old_selected_window); |
f87c0a98 | 13496 | |
96d2320f | 13497 | /* Select mode line face based on the real selected window. */ |
c96e83bf | 13498 | display_mode_line (w, CURRENT_MODE_LINE_FACE_ID_3 (sel_w, sel_w, w), |
715e84c9 GM |
13499 | current_buffer->mode_line_format); |
13500 | ++n; | |
13501 | } | |
5f5c8ee5 | 13502 | |
045dee35 | 13503 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
13504 | { |
13505 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
13506 | current_buffer->header_line_format); | |
13507 | ++n; | |
13508 | } | |
13509 | ||
edd1e654 GM |
13510 | selected_frame = old_selected_frame; |
13511 | selected_window = old_selected_window; | |
715e84c9 | 13512 | return n; |
5f5c8ee5 | 13513 | } |
03b294dc | 13514 | |
03b294dc | 13515 | |
5f5c8ee5 | 13516 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 13517 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
13518 | FORMAT is the mode line format to display. Value is the pixel |
13519 | height of the mode line displayed. */ | |
03b294dc | 13520 | |
04612a64 | 13521 | static int |
5f5c8ee5 GM |
13522 | display_mode_line (w, face_id, format) |
13523 | struct window *w; | |
13524 | enum face_id face_id; | |
13525 | Lisp_Object format; | |
13526 | { | |
13527 | struct it it; | |
13528 | struct face *face; | |
03b294dc | 13529 | |
5f5c8ee5 GM |
13530 | init_iterator (&it, w, -1, -1, NULL, face_id); |
13531 | prepare_desired_row (it.glyph_row); | |
13532 | ||
1862a24e MB |
13533 | if (! mode_line_inverse_video) |
13534 | /* Force the mode-line to be displayed in the default face. */ | |
13535 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13536 | ||
5f5c8ee5 GM |
13537 | /* Temporarily make frame's keyboard the current kboard so that |
13538 | kboard-local variables in the mode_line_format will get the right | |
13539 | values. */ | |
13540 | push_frame_kboard (it.f); | |
0fcf414f | 13541 | display_mode_element (&it, 0, 0, 0, format, Qnil); |
5f5c8ee5 | 13542 | pop_frame_kboard (); |
a2889657 | 13543 | |
5f5c8ee5 GM |
13544 | /* Fill up with spaces. */ |
13545 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
13546 | ||
13547 | compute_line_metrics (&it); | |
13548 | it.glyph_row->full_width_p = 1; | |
13549 | it.glyph_row->mode_line_p = 1; | |
5f5c8ee5 GM |
13550 | it.glyph_row->continued_p = 0; |
13551 | it.glyph_row->truncated_on_left_p = 0; | |
13552 | it.glyph_row->truncated_on_right_p = 0; | |
13553 | ||
13554 | /* Make a 3D mode-line have a shadow at its right end. */ | |
13555 | face = FACE_FROM_ID (it.f, face_id); | |
13556 | extend_face_to_end_of_line (&it); | |
13557 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 13558 | { |
5f5c8ee5 GM |
13559 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
13560 | + it.glyph_row->used[TEXT_AREA] - 1); | |
13561 | last->right_box_line_p = 1; | |
d7eb09a0 | 13562 | } |
04612a64 GM |
13563 | |
13564 | return it.glyph_row->height; | |
a2889657 JB |
13565 | } |
13566 | ||
0fcf414f RS |
13567 | /* Alist that caches the results of :propertize. |
13568 | Each element is (PROPERTIZED-STRING . PROPERTY-LIST). */ | |
13569 | Lisp_Object mode_line_proptrans_alist; | |
a2889657 | 13570 | |
5f5c8ee5 GM |
13571 | /* Contribute ELT to the mode line for window IT->w. How it |
13572 | translates into text depends on its data type. | |
a2889657 | 13573 | |
5f5c8ee5 | 13574 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
13575 | |
13576 | DEPTH is the depth in recursion. It is used to prevent | |
13577 | infinite recursion here. | |
13578 | ||
5f5c8ee5 GM |
13579 | FIELD_WIDTH is the number of characters the display of ELT should |
13580 | occupy in the mode line, and PRECISION is the maximum number of | |
13581 | characters to display from ELT's representation. See | |
b8523839 | 13582 | display_string for details. |
a2889657 | 13583 | |
5f5c8ee5 | 13584 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
13585 | |
13586 | static int | |
0fcf414f | 13587 | display_mode_element (it, depth, field_width, precision, elt, props) |
5f5c8ee5 | 13588 | struct it *it; |
a2889657 | 13589 | int depth; |
5f5c8ee5 | 13590 | int field_width, precision; |
0fcf414f | 13591 | Lisp_Object elt, props; |
a2889657 | 13592 | { |
5f5c8ee5 | 13593 | int n = 0, field, prec; |
0fcf414f | 13594 | int literal = 0; |
5f5c8ee5 | 13595 | |
a2889657 JB |
13596 | tail_recurse: |
13597 | if (depth > 10) | |
13598 | goto invalid; | |
13599 | ||
13600 | depth++; | |
13601 | ||
0220c518 | 13602 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
13603 | { |
13604 | case Lisp_String: | |
13605 | { | |
13606 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 | 13607 | unsigned char c; |
ae02e06a | 13608 | unsigned char *this, *lisp_string; |
5f5c8ee5 | 13609 | |
0fcf414f RS |
13610 | if (!NILP (props)) |
13611 | { | |
13612 | Lisp_Object oprops, aelt; | |
13613 | oprops = Ftext_properties_at (make_number (0), elt); | |
13614 | if (NILP (Fequal (props, oprops))) | |
13615 | { | |
ae02e06a RS |
13616 | /* If the starting string has properties, |
13617 | merge the specified ones onto the existing ones. */ | |
13618 | if (! NILP (oprops)) | |
13619 | { | |
13620 | Lisp_Object tem; | |
13621 | ||
13622 | oprops = Fcopy_sequence (oprops); | |
13623 | tem = props; | |
13624 | while (CONSP (tem)) | |
13625 | { | |
13626 | oprops = Fplist_put (oprops, XCAR (tem), | |
13627 | XCAR (XCDR (tem))); | |
13628 | tem = XCDR (XCDR (tem)); | |
13629 | } | |
13630 | props = oprops; | |
13631 | } | |
13632 | ||
0fcf414f RS |
13633 | aelt = Fassoc (elt, mode_line_proptrans_alist); |
13634 | if (! NILP (aelt) && !NILP (Fequal (props, XCDR (aelt)))) | |
13635 | elt = XCAR (aelt); | |
13636 | else | |
13637 | { | |
13638 | elt = Fcopy_sequence (elt); | |
13639 | Fset_text_properties (0, Flength (elt), props, elt); | |
13640 | mode_line_proptrans_alist | |
13641 | = Fcons (Fcons (elt, props), | |
13642 | mode_line_proptrans_alist); | |
13643 | } | |
13644 | } | |
13645 | } | |
13646 | ||
ae02e06a RS |
13647 | this = XSTRING (elt)->data; |
13648 | lisp_string = this; | |
13649 | ||
0fcf414f RS |
13650 | if (literal) |
13651 | { | |
13652 | prec = precision - n; | |
13653 | if (frame_title_ptr) | |
13654 | n += store_frame_title (XSTRING (elt)->data, -1, prec); | |
13655 | else | |
13656 | n += display_string (NULL, elt, Qnil, 0, 0, it, | |
13657 | 0, prec, 0, STRING_MULTIBYTE (elt)); | |
13658 | ||
13659 | break; | |
13660 | } | |
13661 | ||
5f5c8ee5 GM |
13662 | while ((precision <= 0 || n < precision) |
13663 | && *this | |
13664 | && (frame_title_ptr | |
13665 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
13666 | { |
13667 | unsigned char *last = this; | |
5f5c8ee5 GM |
13668 | |
13669 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
13670 | while ((c = *this++) != '\0' && c != '%') |
13671 | ; | |
5f5c8ee5 | 13672 | |
a2889657 JB |
13673 | if (this - 1 != last) |
13674 | { | |
5f5c8ee5 GM |
13675 | /* Output to end of string or up to '%'. Field width |
13676 | is length of string. Don't output more than | |
13677 | PRECISION allows us. */ | |
d26b89b8 | 13678 | --this; |
eaaa65b0 GM |
13679 | |
13680 | prec = chars_in_text (last, this - last); | |
5f5c8ee5 GM |
13681 | if (precision > 0 && prec > precision - n) |
13682 | prec = precision - n; | |
13683 | ||
d39b6696 | 13684 | if (frame_title_ptr) |
d26b89b8 | 13685 | n += store_frame_title (last, 0, prec); |
d39b6696 | 13686 | else |
eaaa65b0 GM |
13687 | { |
13688 | int bytepos = last - lisp_string; | |
13689 | int charpos = string_byte_to_char (elt, bytepos); | |
13690 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
ca77144d GM |
13691 | it, 0, prec, 0, |
13692 | STRING_MULTIBYTE (elt)); | |
eaaa65b0 | 13693 | } |
a2889657 JB |
13694 | } |
13695 | else /* c == '%' */ | |
13696 | { | |
5f5c8ee5 GM |
13697 | unsigned char *percent_position = this; |
13698 | ||
13699 | /* Get the specified minimum width. Zero means | |
13700 | don't pad. */ | |
13701 | field = 0; | |
a2889657 | 13702 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 13703 | field = field * 10 + c - '0'; |
a2889657 | 13704 | |
5f5c8ee5 GM |
13705 | /* Don't pad beyond the total padding allowed. */ |
13706 | if (field_width - n > 0 && field > field_width - n) | |
13707 | field = field_width - n; | |
a2889657 | 13708 | |
5f5c8ee5 GM |
13709 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
13710 | prec = precision - n; | |
13711 | ||
a2889657 | 13712 | if (c == 'M') |
5f5c8ee5 | 13713 | n += display_mode_element (it, depth, field, prec, |
0fcf414f | 13714 | Vglobal_mode_string, props); |
a2889657 | 13715 | else if (c != 0) |
d39b6696 | 13716 | { |
72f62cb5 | 13717 | int multibyte; |
ae02e06a RS |
13718 | int bytepos, charpos; |
13719 | unsigned char *spec; | |
13720 | ||
13721 | bytepos = percent_position - lisp_string; | |
13722 | charpos = (STRING_MULTIBYTE (elt) | |
13723 | ? string_byte_to_char (elt, bytepos) | |
13724 | : bytepos); | |
13725 | ||
13726 | spec | |
72f62cb5 GM |
13727 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
13728 | ||
d39b6696 | 13729 | if (frame_title_ptr) |
5f5c8ee5 | 13730 | n += store_frame_title (spec, field, prec); |
d39b6696 | 13731 | else |
5f5c8ee5 | 13732 | { |
ae02e06a | 13733 | int nglyphs_before, nwritten; |
72f62cb5 GM |
13734 | |
13735 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; | |
72f62cb5 GM |
13736 | nwritten = display_string (spec, Qnil, elt, |
13737 | charpos, 0, it, | |
13738 | field, prec, 0, | |
13739 | multibyte); | |
5f5c8ee5 GM |
13740 | |
13741 | /* Assign to the glyphs written above the | |
13742 | string where the `%x' came from, position | |
13743 | of the `%'. */ | |
13744 | if (nwritten > 0) | |
13745 | { | |
13746 | struct glyph *glyph | |
13747 | = (it->glyph_row->glyphs[TEXT_AREA] | |
13748 | + nglyphs_before); | |
13749 | int i; | |
13750 | ||
13751 | for (i = 0; i < nwritten; ++i) | |
13752 | { | |
13753 | glyph[i].object = elt; | |
13754 | glyph[i].charpos = charpos; | |
13755 | } | |
13756 | ||
13757 | n += nwritten; | |
13758 | } | |
13759 | } | |
d39b6696 | 13760 | } |
b8523839 AS |
13761 | else /* c == 0 */ |
13762 | break; | |
a2889657 JB |
13763 | } |
13764 | } | |
13765 | } | |
13766 | break; | |
13767 | ||
13768 | case Lisp_Symbol: | |
13769 | /* A symbol: process the value of the symbol recursively | |
13770 | as if it appeared here directly. Avoid error if symbol void. | |
13771 | Special case: if value of symbol is a string, output the string | |
13772 | literally. */ | |
13773 | { | |
13774 | register Lisp_Object tem; | |
13775 | tem = Fboundp (elt); | |
265a9e55 | 13776 | if (!NILP (tem)) |
a2889657 JB |
13777 | { |
13778 | tem = Fsymbol_value (elt); | |
13779 | /* If value is a string, output that string literally: | |
13780 | don't check for % within it. */ | |
e24c997d | 13781 | if (STRINGP (tem)) |
0fcf414f RS |
13782 | literal = 1; |
13783 | ||
13784 | if (!EQ (tem, elt)) | |
5f5c8ee5 GM |
13785 | { |
13786 | /* Give up right away for nil or t. */ | |
13787 | elt = tem; | |
13788 | goto tail_recurse; | |
13789 | } | |
a2889657 JB |
13790 | } |
13791 | } | |
13792 | break; | |
13793 | ||
13794 | case Lisp_Cons: | |
13795 | { | |
13796 | register Lisp_Object car, tem; | |
13797 | ||
0fcf414f RS |
13798 | /* A cons cell: five distinct cases. |
13799 | If first element is :eval or :propertize, do something special. | |
a2889657 JB |
13800 | If first element is a string or a cons, process all the elements |
13801 | and effectively concatenate them. | |
13802 | If first element is a negative number, truncate displaying cdr to | |
13803 | at most that many characters. If positive, pad (with spaces) | |
13804 | to at least that many characters. | |
13805 | If first element is a symbol, process the cadr or caddr recursively | |
13806 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 13807 | car = XCAR (elt); |
0fcf414f | 13808 | if (EQ (car, QCeval)) |
5f5c8ee5 GM |
13809 | { |
13810 | /* An element of the form (:eval FORM) means evaluate FORM | |
13811 | and use the result as mode line elements. */ | |
0fcf414f RS |
13812 | |
13813 | if (CONSP (XCDR (elt))) | |
13814 | { | |
13815 | Lisp_Object spec; | |
13816 | spec = safe_eval (XCAR (XCDR (elt))); | |
13817 | n += display_mode_element (it, depth, field_width - n, | |
13818 | precision - n, spec, props); | |
13819 | } | |
13820 | } | |
13821 | else if (EQ (car, QCpropertize)) | |
13822 | { | |
13823 | if (CONSP (XCDR (elt))) | |
13824 | { | |
13825 | /* An element of the form (:propertize ELT PROPS...) | |
13826 | means display ELT but applying properties PROPS. */ | |
13827 | n += display_mode_element (it, depth, field_width - n, | |
13828 | precision - n, XCAR (XCDR (elt)), | |
13829 | XCDR (XCDR (elt))); | |
13830 | } | |
5f5c8ee5 GM |
13831 | } |
13832 | else if (SYMBOLP (car)) | |
a2889657 JB |
13833 | { |
13834 | tem = Fboundp (car); | |
9472f927 | 13835 | elt = XCDR (elt); |
e24c997d | 13836 | if (!CONSP (elt)) |
a2889657 JB |
13837 | goto invalid; |
13838 | /* elt is now the cdr, and we know it is a cons cell. | |
13839 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 13840 | if (!NILP (tem)) |
a2889657 JB |
13841 | { |
13842 | tem = Fsymbol_value (car); | |
265a9e55 | 13843 | if (!NILP (tem)) |
9472f927 GM |
13844 | { |
13845 | elt = XCAR (elt); | |
13846 | goto tail_recurse; | |
13847 | } | |
a2889657 JB |
13848 | } |
13849 | /* Symbol's value is nil (or symbol is unbound) | |
13850 | Get the cddr of the original list | |
13851 | and if possible find the caddr and use that. */ | |
9472f927 | 13852 | elt = XCDR (elt); |
265a9e55 | 13853 | if (NILP (elt)) |
a2889657 | 13854 | break; |
e24c997d | 13855 | else if (!CONSP (elt)) |
a2889657 | 13856 | goto invalid; |
9472f927 | 13857 | elt = XCAR (elt); |
a2889657 JB |
13858 | goto tail_recurse; |
13859 | } | |
e24c997d | 13860 | else if (INTEGERP (car)) |
a2889657 JB |
13861 | { |
13862 | register int lim = XINT (car); | |
9472f927 | 13863 | elt = XCDR (elt); |
a2889657 | 13864 | if (lim < 0) |
5f5c8ee5 GM |
13865 | { |
13866 | /* Negative int means reduce maximum width. */ | |
13867 | if (precision <= 0) | |
13868 | precision = -lim; | |
13869 | else | |
13870 | precision = min (precision, -lim); | |
13871 | } | |
a2889657 JB |
13872 | else if (lim > 0) |
13873 | { | |
13874 | /* Padding specified. Don't let it be more than | |
13875 | current maximum. */ | |
5f5c8ee5 GM |
13876 | if (precision > 0) |
13877 | lim = min (precision, lim); | |
13878 | ||
a2889657 JB |
13879 | /* If that's more padding than already wanted, queue it. |
13880 | But don't reduce padding already specified even if | |
13881 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 13882 | field_width = max (lim, field_width); |
a2889657 JB |
13883 | } |
13884 | goto tail_recurse; | |
13885 | } | |
e24c997d | 13886 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
13887 | { |
13888 | register int limit = 50; | |
5f5c8ee5 GM |
13889 | /* Limit is to protect against circular lists. */ |
13890 | while (CONSP (elt) | |
13891 | && --limit > 0 | |
13892 | && (precision <= 0 || n < precision)) | |
a2889657 | 13893 | { |
5f5c8ee5 | 13894 | n += display_mode_element (it, depth, field_width - n, |
0fcf414f | 13895 | precision - n, XCAR (elt), props); |
9472f927 | 13896 | elt = XCDR (elt); |
a2889657 JB |
13897 | } |
13898 | } | |
13899 | } | |
13900 | break; | |
13901 | ||
13902 | default: | |
13903 | invalid: | |
d39b6696 | 13904 | if (frame_title_ptr) |
5f5c8ee5 | 13905 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 13906 | else |
5f5c8ee5 GM |
13907 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
13908 | precision - n, 0, 0); | |
13909 | return n; | |
a2889657 JB |
13910 | } |
13911 | ||
5f5c8ee5 GM |
13912 | /* Pad to FIELD_WIDTH. */ |
13913 | if (field_width > 0 && n < field_width) | |
13914 | { | |
13915 | if (frame_title_ptr) | |
13916 | n += store_frame_title ("", field_width - n, 0); | |
13917 | else | |
13918 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
13919 | 0, 0, 0); | |
13920 | } | |
13921 | ||
13922 | return n; | |
a2889657 | 13923 | } |
5f5c8ee5 GM |
13924 | |
13925 | ||
766525bc RS |
13926 | /* Write a null-terminated, right justified decimal representation of |
13927 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
13928 | ||
13929 | static void | |
13930 | pint2str (buf, width, d) | |
13931 | register char *buf; | |
13932 | register int width; | |
13933 | register int d; | |
13934 | { | |
13935 | register char *p = buf; | |
13936 | ||
13937 | if (d <= 0) | |
5f5c8ee5 | 13938 | *p++ = '0'; |
766525bc | 13939 | else |
5f5c8ee5 | 13940 | { |
766525bc | 13941 | while (d > 0) |
5f5c8ee5 | 13942 | { |
766525bc RS |
13943 | *p++ = d % 10 + '0'; |
13944 | d /= 10; | |
5f5c8ee5 GM |
13945 | } |
13946 | } | |
13947 | ||
13948 | for (width -= (int) (p - buf); width > 0; --width) | |
13949 | *p++ = ' '; | |
766525bc RS |
13950 | *p-- = '\0'; |
13951 | while (p > buf) | |
5f5c8ee5 | 13952 | { |
766525bc RS |
13953 | d = *buf; |
13954 | *buf++ = *p; | |
13955 | *p-- = d; | |
5f5c8ee5 | 13956 | } |
766525bc RS |
13957 | } |
13958 | ||
5f5c8ee5 | 13959 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
13960 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
13961 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
13962 | ||
6693a99a | 13963 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 13964 | |
1c9241f5 KH |
13965 | static char * |
13966 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
13967 | Lisp_Object coding_system; | |
13968 | register char *buf; | |
13969 | int eol_flag; | |
13970 | { | |
1e1078d6 | 13971 | Lisp_Object val; |
916848d8 | 13972 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
13973 | unsigned char *eol_str; |
13974 | int eol_str_len; | |
13975 | /* The EOL conversion we are using. */ | |
13976 | Lisp_Object eoltype; | |
1e1078d6 | 13977 | |
4a09dee0 | 13978 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 13979 | eoltype = Qnil; |
1c9241f5 | 13980 | |
4a09dee0 | 13981 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 13982 | { |
916848d8 RS |
13983 | if (multibyte) |
13984 | *buf++ = '-'; | |
21e989e3 | 13985 | if (eol_flag) |
302f2b38 | 13986 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 13987 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
13988 | } |
13989 | else | |
13990 | { | |
1e1078d6 RS |
13991 | Lisp_Object eolvalue; |
13992 | ||
13993 | eolvalue = Fget (coding_system, Qeol_type); | |
13994 | ||
916848d8 | 13995 | if (multibyte) |
a61b7058 | 13996 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 13997 | |
1c9241f5 KH |
13998 | if (eol_flag) |
13999 | { | |
1e1078d6 RS |
14000 | /* The EOL conversion that is normal on this system. */ |
14001 | ||
14002 | if (NILP (eolvalue)) /* Not yet decided. */ | |
14003 | eoltype = eol_mnemonic_undecided; | |
14004 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
14005 | eoltype = eol_mnemonic_undecided; | |
14006 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
14007 | eoltype = (XFASTINT (eolvalue) == 0 | |
14008 | ? eol_mnemonic_unix | |
14009 | : (XFASTINT (eolvalue) == 1 | |
14010 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
14011 | } |
14012 | } | |
5f5c8ee5 | 14013 | |
302f2b38 EZ |
14014 | if (eol_flag) |
14015 | { | |
14016 | /* Mention the EOL conversion if it is not the usual one. */ | |
14017 | if (STRINGP (eoltype)) | |
14018 | { | |
14019 | eol_str = XSTRING (eoltype)->data; | |
14020 | eol_str_len = XSTRING (eoltype)->size; | |
14021 | } | |
f30b3499 KH |
14022 | else if (INTEGERP (eoltype) |
14023 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
14024 | { | |
4a09dee0 | 14025 | eol_str = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
260a86a0 | 14026 | eol_str_len = CHAR_STRING (XINT (eoltype), eol_str); |
f30b3499 | 14027 | } |
302f2b38 EZ |
14028 | else |
14029 | { | |
14030 | eol_str = invalid_eol_type; | |
14031 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 14032 | } |
f30b3499 | 14033 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 14034 | buf += eol_str_len; |
1c9241f5 | 14035 | } |
302f2b38 | 14036 | |
1c9241f5 KH |
14037 | return buf; |
14038 | } | |
14039 | ||
a2889657 | 14040 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
14041 | generated by character C. PRECISION >= 0 means don't return a |
14042 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 GM |
14043 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
14044 | if the result is multibyte text. */ | |
a2889657 | 14045 | |
11e82b76 JB |
14046 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
14047 | ||
a2889657 | 14048 | static char * |
72f62cb5 | 14049 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 14050 | struct window *w; |
68c45bf0 | 14051 | register int c; |
5f5c8ee5 | 14052 | int field_width, precision; |
72f62cb5 | 14053 | int *multibyte; |
a2889657 | 14054 | { |
0b67772d | 14055 | Lisp_Object obj; |
5f5c8ee5 GM |
14056 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
14057 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 14058 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 14059 | |
0b67772d | 14060 | obj = Qnil; |
72f62cb5 | 14061 | *multibyte = 0; |
a2889657 JB |
14062 | |
14063 | switch (c) | |
14064 | { | |
1af9f229 RS |
14065 | case '*': |
14066 | if (!NILP (b->read_only)) | |
14067 | return "%"; | |
14068 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14069 | return "*"; | |
14070 | return "-"; | |
14071 | ||
14072 | case '+': | |
14073 | /* This differs from %* only for a modified read-only buffer. */ | |
14074 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14075 | return "*"; | |
14076 | if (!NILP (b->read_only)) | |
14077 | return "%"; | |
14078 | return "-"; | |
14079 | ||
14080 | case '&': | |
14081 | /* This differs from %* in ignoring read-only-ness. */ | |
14082 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
14083 | return "*"; | |
14084 | return "-"; | |
14085 | ||
14086 | case '%': | |
14087 | return "%"; | |
14088 | ||
14089 | case '[': | |
14090 | { | |
14091 | int i; | |
14092 | char *p; | |
14093 | ||
14094 | if (command_loop_level > 5) | |
14095 | return "[[[... "; | |
14096 | p = decode_mode_spec_buf; | |
14097 | for (i = 0; i < command_loop_level; i++) | |
14098 | *p++ = '['; | |
14099 | *p = 0; | |
14100 | return decode_mode_spec_buf; | |
14101 | } | |
14102 | ||
14103 | case ']': | |
14104 | { | |
14105 | int i; | |
14106 | char *p; | |
14107 | ||
14108 | if (command_loop_level > 5) | |
14109 | return " ...]]]"; | |
14110 | p = decode_mode_spec_buf; | |
14111 | for (i = 0; i < command_loop_level; i++) | |
14112 | *p++ = ']'; | |
14113 | *p = 0; | |
14114 | return decode_mode_spec_buf; | |
14115 | } | |
14116 | ||
14117 | case '-': | |
14118 | { | |
1af9f229 | 14119 | register int i; |
5f5c8ee5 GM |
14120 | |
14121 | /* Let lots_of_dashes be a string of infinite length. */ | |
14122 | if (field_width <= 0 | |
14123 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 14124 | { |
5f5c8ee5 GM |
14125 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
14126 | decode_mode_spec_buf[i] = '-'; | |
14127 | decode_mode_spec_buf[i] = '\0'; | |
14128 | return decode_mode_spec_buf; | |
1af9f229 | 14129 | } |
5f5c8ee5 GM |
14130 | else |
14131 | return lots_of_dashes; | |
1af9f229 RS |
14132 | } |
14133 | ||
a2889657 | 14134 | case 'b': |
d39b6696 | 14135 | obj = b->name; |
a2889657 JB |
14136 | break; |
14137 | ||
1af9f229 RS |
14138 | case 'c': |
14139 | { | |
14140 | int col = current_column (); | |
ac90c44f | 14141 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 14142 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
14143 | return decode_mode_spec_buf; |
14144 | } | |
14145 | ||
14146 | case 'F': | |
14147 | /* %F displays the frame name. */ | |
5f5c8ee5 | 14148 | if (!NILP (f->title)) |
95184b48 | 14149 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 14150 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 14151 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 14152 | return "Emacs"; |
1af9f229 | 14153 | |
a2889657 | 14154 | case 'f': |
d39b6696 | 14155 | obj = b->filename; |
a2889657 JB |
14156 | break; |
14157 | ||
aa6d10fa RS |
14158 | case 'l': |
14159 | { | |
12adba34 RS |
14160 | int startpos = XMARKER (w->start)->charpos; |
14161 | int startpos_byte = marker_byte_position (w->start); | |
14162 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 14163 | int nlines, junk; |
aa6d10fa RS |
14164 | int height = XFASTINT (w->height); |
14165 | ||
14166 | /* If we decided that this buffer isn't suitable for line numbers, | |
14167 | don't forget that too fast. */ | |
14168 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 14169 | goto no_value; |
5300fd39 RS |
14170 | /* But do forget it, if the window shows a different buffer now. */ |
14171 | else if (BUFFERP (w->base_line_pos)) | |
14172 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
14173 | |
14174 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 14175 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 14176 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
14177 | { |
14178 | w->base_line_pos = Qnil; | |
14179 | w->base_line_number = Qnil; | |
766525bc | 14180 | goto no_value; |
aa6d10fa RS |
14181 | } |
14182 | ||
14183 | if (!NILP (w->base_line_number) | |
14184 | && !NILP (w->base_line_pos) | |
12adba34 | 14185 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
14186 | { |
14187 | line = XFASTINT (w->base_line_number); | |
14188 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 14189 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
14190 | } |
14191 | else | |
14192 | { | |
14193 | line = 1; | |
d39b6696 | 14194 | linepos = BUF_BEGV (b); |
12adba34 | 14195 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
14196 | } |
14197 | ||
14198 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
14199 | nlines = display_count_lines (linepos, linepos_byte, |
14200 | startpos_byte, | |
14201 | startpos, &junk); | |
aa6d10fa RS |
14202 | |
14203 | topline = nlines + line; | |
14204 | ||
14205 | /* Determine a new base line, if the old one is too close | |
14206 | or too far away, or if we did not have one. | |
14207 | "Too close" means it's plausible a scroll-down would | |
14208 | go back past it. */ | |
d39b6696 | 14209 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 14210 | { |
ac90c44f GM |
14211 | w->base_line_number = make_number (topline); |
14212 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
14213 | } |
14214 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 14215 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 14216 | { |
d39b6696 | 14217 | int limit = BUF_BEGV (b); |
12adba34 | 14218 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 14219 | int position; |
5d121aec | 14220 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
14221 | |
14222 | if (startpos - distance > limit) | |
12adba34 RS |
14223 | { |
14224 | limit = startpos - distance; | |
14225 | limit_byte = CHAR_TO_BYTE (limit); | |
14226 | } | |
aa6d10fa | 14227 | |
12adba34 RS |
14228 | nlines = display_count_lines (startpos, startpos_byte, |
14229 | limit_byte, | |
14230 | - (height * 2 + 30), | |
aa6d10fa RS |
14231 | &position); |
14232 | /* If we couldn't find the lines we wanted within | |
5d121aec | 14233 | line_number_display_limit_width chars per line, |
aa6d10fa | 14234 | give up on line numbers for this window. */ |
12adba34 | 14235 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
14236 | { |
14237 | w->base_line_pos = w->buffer; | |
14238 | w->base_line_number = Qnil; | |
766525bc | 14239 | goto no_value; |
aa6d10fa RS |
14240 | } |
14241 | ||
ac90c44f GM |
14242 | w->base_line_number = make_number (topline - nlines); |
14243 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
14244 | } |
14245 | ||
14246 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
14247 | nlines = display_count_lines (startpos, startpos_byte, |
14248 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
14249 | |
14250 | /* Record that we did display the line number. */ | |
14251 | line_number_displayed = 1; | |
14252 | ||
14253 | /* Make the string to show. */ | |
5f5c8ee5 | 14254 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 14255 | return decode_mode_spec_buf; |
766525bc RS |
14256 | no_value: |
14257 | { | |
14258 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
14259 | int pad = field_width - 2; |
14260 | while (pad-- > 0) | |
14261 | *p++ = ' '; | |
14262 | *p++ = '?'; | |
b357b9d4 KR |
14263 | *p++ = '?'; |
14264 | *p = '\0'; | |
766525bc RS |
14265 | return decode_mode_spec_buf; |
14266 | } | |
aa6d10fa RS |
14267 | } |
14268 | break; | |
14269 | ||
a2889657 | 14270 | case 'm': |
d39b6696 | 14271 | obj = b->mode_name; |
a2889657 JB |
14272 | break; |
14273 | ||
14274 | case 'n': | |
d39b6696 | 14275 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
14276 | return " Narrow"; |
14277 | break; | |
14278 | ||
a2889657 JB |
14279 | case 'p': |
14280 | { | |
14281 | int pos = marker_position (w->start); | |
d39b6696 | 14282 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 14283 | |
d39b6696 | 14284 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 14285 | { |
d39b6696 | 14286 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14287 | return "All"; |
14288 | else | |
14289 | return "Bottom"; | |
14290 | } | |
d39b6696 | 14291 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14292 | return "Top"; |
14293 | else | |
14294 | { | |
3c7d31b9 RS |
14295 | if (total > 1000000) |
14296 | /* Do it differently for a large value, to avoid overflow. */ | |
14297 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14298 | else | |
14299 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
14300 | /* We can't normally display a 3-digit number, |
14301 | so get us a 2-digit number that is close. */ | |
14302 | if (total == 100) | |
14303 | total = 99; | |
14304 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14305 | return decode_mode_spec_buf; | |
14306 | } | |
14307 | } | |
14308 | ||
8ffcb79f RS |
14309 | /* Display percentage of size above the bottom of the screen. */ |
14310 | case 'P': | |
14311 | { | |
14312 | int toppos = marker_position (w->start); | |
d39b6696 KH |
14313 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
14314 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 14315 | |
d39b6696 | 14316 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 14317 | { |
d39b6696 | 14318 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14319 | return "All"; |
14320 | else | |
14321 | return "Bottom"; | |
14322 | } | |
14323 | else | |
14324 | { | |
3c7d31b9 RS |
14325 | if (total > 1000000) |
14326 | /* Do it differently for a large value, to avoid overflow. */ | |
14327 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14328 | else | |
14329 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
14330 | /* We can't normally display a 3-digit number, |
14331 | so get us a 2-digit number that is close. */ | |
14332 | if (total == 100) | |
14333 | total = 99; | |
d39b6696 | 14334 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14335 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
14336 | else | |
14337 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14338 | return decode_mode_spec_buf; | |
14339 | } | |
14340 | } | |
14341 | ||
1af9f229 RS |
14342 | case 's': |
14343 | /* status of process */ | |
14344 | obj = Fget_buffer_process (w->buffer); | |
14345 | if (NILP (obj)) | |
14346 | return "no process"; | |
14347 | #ifdef subprocesses | |
14348 | obj = Fsymbol_name (Fprocess_status (obj)); | |
14349 | #endif | |
14350 | break; | |
d39b6696 | 14351 | |
1af9f229 RS |
14352 | case 't': /* indicate TEXT or BINARY */ |
14353 | #ifdef MODE_LINE_BINARY_TEXT | |
14354 | return MODE_LINE_BINARY_TEXT (b); | |
14355 | #else | |
14356 | return "T"; | |
14357 | #endif | |
1c9241f5 KH |
14358 | |
14359 | case 'z': | |
14360 | /* coding-system (not including end-of-line format) */ | |
14361 | case 'Z': | |
14362 | /* coding-system (including end-of-line type) */ | |
14363 | { | |
14364 | int eol_flag = (c == 'Z'); | |
539b4d41 | 14365 | char *p = decode_mode_spec_buf; |
1c9241f5 | 14366 | |
d30e754b | 14367 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 14368 | { |
11c52c4f RS |
14369 | /* No need to mention EOL here--the terminal never needs |
14370 | to do EOL conversion. */ | |
14371 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
14372 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 14373 | } |
f13c925f | 14374 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 14375 | p, eol_flag); |
f13c925f | 14376 | |
11c52c4f | 14377 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
14378 | #ifdef subprocesses |
14379 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
14380 | if (PROCESSP (obj)) | |
14381 | { | |
14382 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
14383 | p, eol_flag); | |
14384 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
14385 | p, eol_flag); | |
14386 | } | |
14387 | #endif /* subprocesses */ | |
11c52c4f | 14388 | #endif /* 0 */ |
1c9241f5 KH |
14389 | *p = 0; |
14390 | return decode_mode_spec_buf; | |
14391 | } | |
a2889657 | 14392 | } |
d39b6696 | 14393 | |
e24c997d | 14394 | if (STRINGP (obj)) |
72f62cb5 GM |
14395 | { |
14396 | *multibyte = STRING_MULTIBYTE (obj); | |
14397 | return (char *) XSTRING (obj)->data; | |
14398 | } | |
a2889657 JB |
14399 | else |
14400 | return ""; | |
14401 | } | |
5f5c8ee5 GM |
14402 | |
14403 | ||
12adba34 RS |
14404 | /* Count up to COUNT lines starting from START / START_BYTE. |
14405 | But don't go beyond LIMIT_BYTE. | |
14406 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 14407 | |
12adba34 | 14408 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
14409 | |
14410 | static int | |
12adba34 RS |
14411 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
14412 | int start, start_byte, limit_byte, count; | |
14413 | int *byte_pos_ptr; | |
59b49f63 | 14414 | { |
59b49f63 RS |
14415 | register unsigned char *cursor; |
14416 | unsigned char *base; | |
14417 | ||
14418 | register int ceiling; | |
14419 | register unsigned char *ceiling_addr; | |
12adba34 | 14420 | int orig_count = count; |
59b49f63 RS |
14421 | |
14422 | /* If we are not in selective display mode, | |
14423 | check only for newlines. */ | |
12adba34 RS |
14424 | int selective_display = (!NILP (current_buffer->selective_display) |
14425 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
14426 | |
14427 | if (count > 0) | |
12adba34 RS |
14428 | { |
14429 | while (start_byte < limit_byte) | |
14430 | { | |
14431 | ceiling = BUFFER_CEILING_OF (start_byte); | |
14432 | ceiling = min (limit_byte - 1, ceiling); | |
14433 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
14434 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
14435 | while (1) | |
14436 | { | |
14437 | if (selective_display) | |
14438 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
14439 | ; | |
14440 | else | |
14441 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
14442 | ; | |
14443 | ||
14444 | if (cursor != ceiling_addr) | |
14445 | { | |
14446 | if (--count == 0) | |
14447 | { | |
14448 | start_byte += cursor - base + 1; | |
14449 | *byte_pos_ptr = start_byte; | |
14450 | return orig_count; | |
14451 | } | |
14452 | else | |
14453 | if (++cursor == ceiling_addr) | |
14454 | break; | |
14455 | } | |
14456 | else | |
14457 | break; | |
14458 | } | |
14459 | start_byte += cursor - base; | |
14460 | } | |
14461 | } | |
59b49f63 RS |
14462 | else |
14463 | { | |
12adba34 RS |
14464 | while (start_byte > limit_byte) |
14465 | { | |
14466 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
14467 | ceiling = max (limit_byte, ceiling); | |
14468 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
14469 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
14470 | while (1) |
14471 | { | |
12adba34 RS |
14472 | if (selective_display) |
14473 | while (--cursor != ceiling_addr | |
14474 | && *cursor != '\n' && *cursor != 015) | |
14475 | ; | |
14476 | else | |
14477 | while (--cursor != ceiling_addr && *cursor != '\n') | |
14478 | ; | |
14479 | ||
59b49f63 RS |
14480 | if (cursor != ceiling_addr) |
14481 | { | |
14482 | if (++count == 0) | |
14483 | { | |
12adba34 RS |
14484 | start_byte += cursor - base + 1; |
14485 | *byte_pos_ptr = start_byte; | |
14486 | /* When scanning backwards, we should | |
14487 | not count the newline posterior to which we stop. */ | |
14488 | return - orig_count - 1; | |
59b49f63 RS |
14489 | } |
14490 | } | |
14491 | else | |
14492 | break; | |
14493 | } | |
12adba34 RS |
14494 | /* Here we add 1 to compensate for the last decrement |
14495 | of CURSOR, which took it past the valid range. */ | |
14496 | start_byte += cursor - base + 1; | |
59b49f63 RS |
14497 | } |
14498 | } | |
14499 | ||
12adba34 | 14500 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 14501 | |
12adba34 RS |
14502 | if (count < 0) |
14503 | return - orig_count + count; | |
14504 | return orig_count - count; | |
aa6d10fa | 14505 | |
12adba34 | 14506 | } |
a2889657 | 14507 | |
a2889657 | 14508 | |
5f5c8ee5 GM |
14509 | \f |
14510 | /*********************************************************************** | |
14511 | Displaying strings | |
14512 | ***********************************************************************/ | |
278feba9 | 14513 | |
5f5c8ee5 | 14514 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 14515 | |
5f5c8ee5 GM |
14516 | If STRING is non-null, display that C string. Otherwise, the Lisp |
14517 | string LISP_STRING is displayed. | |
a2889657 | 14518 | |
5f5c8ee5 GM |
14519 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
14520 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
14521 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 14522 | |
5f5c8ee5 GM |
14523 | Display the string in the environment given by IT, but use the |
14524 | standard display table, temporarily. | |
a3788d53 | 14525 | |
5f5c8ee5 GM |
14526 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
14527 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
14528 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
14529 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
14530 | ||
14531 | PRECISION is the maximum number of characters to output from | |
14532 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 14533 | |
5f5c8ee5 | 14534 | This is roughly equivalent to printf format specifiers: |
a2889657 | 14535 | |
5f5c8ee5 GM |
14536 | FIELD_WIDTH PRECISION PRINTF |
14537 | ---------------------------------------- | |
14538 | -1 -1 %s | |
14539 | -1 10 %.10s | |
14540 | 10 -1 %10s | |
14541 | 20 10 %20.10s | |
a2889657 | 14542 | |
5f5c8ee5 GM |
14543 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
14544 | display them, and < 0 means obey the current buffer's value of | |
14545 | enable_multibyte_characters. | |
278feba9 | 14546 | |
5f5c8ee5 | 14547 | Value is the number of glyphs produced. */ |
b1d1124b | 14548 | |
5f5c8ee5 GM |
14549 | static int |
14550 | display_string (string, lisp_string, face_string, face_string_pos, | |
14551 | start, it, field_width, precision, max_x, multibyte) | |
14552 | unsigned char *string; | |
14553 | Lisp_Object lisp_string; | |
68c45bf0 PE |
14554 | Lisp_Object face_string; |
14555 | int face_string_pos; | |
5f5c8ee5 GM |
14556 | int start; |
14557 | struct it *it; | |
14558 | int field_width, precision, max_x; | |
14559 | int multibyte; | |
14560 | { | |
14561 | int hpos_at_start = it->hpos; | |
14562 | int saved_face_id = it->face_id; | |
14563 | struct glyph_row *row = it->glyph_row; | |
14564 | ||
14565 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 14566 | with index START. */ |
5f5c8ee5 GM |
14567 | reseat_to_string (it, string, lisp_string, start, |
14568 | precision, field_width, multibyte); | |
14569 | ||
14570 | /* If displaying STRING, set up the face of the iterator | |
14571 | from LISP_STRING, if that's given. */ | |
14572 | if (STRINGP (face_string)) | |
14573 | { | |
14574 | int endptr; | |
14575 | struct face *face; | |
14576 | ||
14577 | it->face_id | |
14578 | = face_at_string_position (it->w, face_string, face_string_pos, | |
14579 | 0, it->region_beg_charpos, | |
14580 | it->region_end_charpos, | |
5de7c6f2 | 14581 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
14582 | face = FACE_FROM_ID (it->f, it->face_id); |
14583 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 14584 | } |
a2889657 | 14585 | |
5f5c8ee5 GM |
14586 | /* Set max_x to the maximum allowed X position. Don't let it go |
14587 | beyond the right edge of the window. */ | |
14588 | if (max_x <= 0) | |
14589 | max_x = it->last_visible_x; | |
14590 | else | |
14591 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 14592 | |
5f5c8ee5 GM |
14593 | /* Skip over display elements that are not visible. because IT->w is |
14594 | hscrolled. */ | |
14595 | if (it->current_x < it->first_visible_x) | |
14596 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
14597 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 14598 | |
5f5c8ee5 GM |
14599 | row->ascent = it->max_ascent; |
14600 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
14601 | row->phys_ascent = it->max_phys_ascent; |
14602 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 14603 | |
5f5c8ee5 GM |
14604 | /* This condition is for the case that we are called with current_x |
14605 | past last_visible_x. */ | |
14606 | while (it->current_x < max_x) | |
a2889657 | 14607 | { |
5f5c8ee5 | 14608 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 14609 | |
5f5c8ee5 GM |
14610 | /* Get the next display element. */ |
14611 | if (!get_next_display_element (it)) | |
90adcf20 | 14612 | break; |
1c9241f5 | 14613 | |
5f5c8ee5 GM |
14614 | /* Produce glyphs. */ |
14615 | x_before = it->current_x; | |
14616 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
14617 | PRODUCE_GLYPHS (it); | |
90adcf20 | 14618 | |
5f5c8ee5 GM |
14619 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
14620 | i = 0; | |
14621 | x = x_before; | |
14622 | while (i < nglyphs) | |
a2889657 | 14623 | { |
5f5c8ee5 GM |
14624 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
14625 | ||
14626 | if (!it->truncate_lines_p | |
14627 | && x + glyph->pixel_width > max_x) | |
14628 | { | |
14629 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
14630 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
14631 | { | |
14632 | /* A wide character is unbreakable. */ | |
14633 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
14634 | it->current_x = x_before; | |
14635 | } | |
14636 | else | |
14637 | { | |
14638 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
14639 | it->current_x = x; | |
14640 | } | |
5f5c8ee5 GM |
14641 | break; |
14642 | } | |
14643 | else if (x + glyph->pixel_width > it->first_visible_x) | |
14644 | { | |
14645 | /* Glyph is at least partially visible. */ | |
14646 | ++it->hpos; | |
14647 | if (x < it->first_visible_x) | |
14648 | it->glyph_row->x = x - it->first_visible_x; | |
14649 | } | |
14650 | else | |
a2889657 | 14651 | { |
5f5c8ee5 GM |
14652 | /* Glyph is off the left margin of the display area. |
14653 | Should not happen. */ | |
14654 | abort (); | |
a2889657 | 14655 | } |
5f5c8ee5 GM |
14656 | |
14657 | row->ascent = max (row->ascent, it->max_ascent); | |
14658 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
14659 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
14660 | row->phys_height = max (row->phys_height, | |
14661 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
14662 | x += glyph->pixel_width; |
14663 | ++i; | |
a2889657 | 14664 | } |
5f5c8ee5 GM |
14665 | |
14666 | /* Stop if max_x reached. */ | |
14667 | if (i < nglyphs) | |
14668 | break; | |
14669 | ||
14670 | /* Stop at line ends. */ | |
14671 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 14672 | { |
5f5c8ee5 GM |
14673 | it->continuation_lines_width = 0; |
14674 | break; | |
a2889657 | 14675 | } |
1c9241f5 | 14676 | |
cafafe0b | 14677 | set_iterator_to_next (it, 1); |
a688bb24 | 14678 | |
5f5c8ee5 GM |
14679 | /* Stop if truncating at the right edge. */ |
14680 | if (it->truncate_lines_p | |
14681 | && it->current_x >= it->last_visible_x) | |
14682 | { | |
14683 | /* Add truncation mark, but don't do it if the line is | |
14684 | truncated at a padding space. */ | |
14685 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 14686 | { |
5f5c8ee5 | 14687 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
14688 | { |
14689 | int i, n; | |
14690 | ||
9299cb15 | 14691 | if (it->current_x > it->last_visible_x) |
37be86f2 | 14692 | { |
9299cb15 KH |
14693 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
14694 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
14695 | break; | |
14696 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
14697 | { | |
14698 | row->used[TEXT_AREA] = i; | |
14699 | produce_special_glyphs (it, IT_TRUNCATION); | |
14700 | } | |
37be86f2 | 14701 | } |
9299cb15 | 14702 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 14703 | } |
5f5c8ee5 | 14704 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 14705 | } |
5f5c8ee5 | 14706 | break; |
1c9241f5 | 14707 | } |
a2889657 JB |
14708 | } |
14709 | ||
5f5c8ee5 GM |
14710 | /* Maybe insert a truncation at the left. */ |
14711 | if (it->first_visible_x | |
14712 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 14713 | { |
5f5c8ee5 GM |
14714 | if (!FRAME_WINDOW_P (it->f)) |
14715 | insert_left_trunc_glyphs (it); | |
14716 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
14717 | } |
14718 | ||
5f5c8ee5 GM |
14719 | it->face_id = saved_face_id; |
14720 | ||
14721 | /* Value is number of columns displayed. */ | |
14722 | return it->hpos - hpos_at_start; | |
14723 | } | |
a2889657 | 14724 | |
a2889657 | 14725 | |
a2889657 | 14726 | \f |
3b6b6db7 | 14727 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
14728 | appears as an element of LIST or as the car of an element of LIST. |
14729 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
14730 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
14731 | Otherwise return 0. This function cannot quit. | |
14732 | The return value is 2 if the text is invisible but with an ellipsis | |
14733 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
14734 | |
14735 | int | |
14736 | invisible_p (propval, list) | |
14737 | register Lisp_Object propval; | |
14738 | Lisp_Object list; | |
14739 | { | |
3b6b6db7 SM |
14740 | register Lisp_Object tail, proptail; |
14741 | ||
14742 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
14743 | { | |
14744 | register Lisp_Object tem; | |
14745 | tem = XCAR (tail); | |
14746 | if (EQ (propval, tem)) | |
14747 | return 1; | |
14748 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
14749 | return NILP (XCDR (tem)) ? 1 : 2; | |
14750 | } | |
14751 | ||
14752 | if (CONSP (propval)) | |
14753 | { | |
14754 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
14755 | { | |
14756 | Lisp_Object propelt; | |
14757 | propelt = XCAR (proptail); | |
14758 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
14759 | { | |
14760 | register Lisp_Object tem; | |
14761 | tem = XCAR (tail); | |
14762 | if (EQ (propelt, tem)) | |
14763 | return 1; | |
14764 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
14765 | return NILP (XCDR (tem)) ? 1 : 2; | |
14766 | } | |
14767 | } | |
14768 | } | |
14769 | ||
14770 | return 0; | |
642eefc6 | 14771 | } |
5f5c8ee5 | 14772 | |
642eefc6 | 14773 | \f |
5f5c8ee5 GM |
14774 | /*********************************************************************** |
14775 | Initialization | |
14776 | ***********************************************************************/ | |
14777 | ||
a2889657 JB |
14778 | void |
14779 | syms_of_xdisp () | |
14780 | { | |
c6e89d6c GM |
14781 | Vwith_echo_area_save_vector = Qnil; |
14782 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 14783 | |
c6e89d6c GM |
14784 | Vmessage_stack = Qnil; |
14785 | staticpro (&Vmessage_stack); | |
14786 | ||
735c094c | 14787 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 14788 | staticpro (&Qinhibit_redisplay); |
735c094c | 14789 | |
b14bc55e RS |
14790 | message_dolog_marker1 = Fmake_marker (); |
14791 | staticpro (&message_dolog_marker1); | |
14792 | message_dolog_marker2 = Fmake_marker (); | |
14793 | staticpro (&message_dolog_marker2); | |
14794 | message_dolog_marker3 = Fmake_marker (); | |
14795 | staticpro (&message_dolog_marker3); | |
14796 | ||
5f5c8ee5 GM |
14797 | #if GLYPH_DEBUG |
14798 | defsubr (&Sdump_glyph_matrix); | |
14799 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 14800 | defsubr (&Sdump_tool_bar_row); |
62397849 | 14801 | defsubr (&Strace_redisplay); |
bf9249e3 | 14802 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 14803 | #endif |
99a5de87 | 14804 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 14805 | defsubr (&Stool_bar_lines_needed); |
99a5de87 | 14806 | #endif |
5f5c8ee5 | 14807 | |
cf074754 RS |
14808 | staticpro (&Qmenu_bar_update_hook); |
14809 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
14810 | ||
d46fb96a | 14811 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 14812 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 14813 | |
399164b4 KH |
14814 | staticpro (&Qoverriding_local_map); |
14815 | Qoverriding_local_map = intern ("overriding-local-map"); | |
14816 | ||
75c43375 RS |
14817 | staticpro (&Qwindow_scroll_functions); |
14818 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
14819 | ||
e0bfbde6 RS |
14820 | staticpro (&Qredisplay_end_trigger_functions); |
14821 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 14822 | |
2e54982e RS |
14823 | staticpro (&Qinhibit_point_motion_hooks); |
14824 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
14825 | ||
9499d71b GM |
14826 | QCdata = intern (":data"); |
14827 | staticpro (&QCdata); | |
5f5c8ee5 | 14828 | Qdisplay = intern ("display"); |
f3751a65 | 14829 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
14830 | Qspace_width = intern ("space-width"); |
14831 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
14832 | Qraise = intern ("raise"); |
14833 | staticpro (&Qraise); | |
14834 | Qspace = intern ("space"); | |
14835 | staticpro (&Qspace); | |
f3751a65 GM |
14836 | Qmargin = intern ("margin"); |
14837 | staticpro (&Qmargin); | |
5f5c8ee5 | 14838 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 14839 | staticpro (&Qleft_margin); |
5f5c8ee5 | 14840 | Qright_margin = intern ("right-margin"); |
f3751a65 | 14841 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
14842 | Qalign_to = intern ("align-to"); |
14843 | staticpro (&Qalign_to); | |
14844 | QCalign_to = intern (":align-to"); | |
14845 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
14846 | Qrelative_width = intern ("relative-width"); |
14847 | staticpro (&Qrelative_width); | |
14848 | QCrelative_width = intern (":relative-width"); | |
14849 | staticpro (&QCrelative_width); | |
14850 | QCrelative_height = intern (":relative-height"); | |
14851 | staticpro (&QCrelative_height); | |
14852 | QCeval = intern (":eval"); | |
14853 | staticpro (&QCeval); | |
0fcf414f RS |
14854 | QCpropertize = intern (":propertize"); |
14855 | staticpro (&QCpropertize); | |
d3acf96b | 14856 | Qwhen = intern ("when"); |
f3751a65 | 14857 | staticpro (&Qwhen); |
886bd6f2 GM |
14858 | QCfile = intern (":file"); |
14859 | staticpro (&QCfile); | |
5f5c8ee5 GM |
14860 | Qfontified = intern ("fontified"); |
14861 | staticpro (&Qfontified); | |
14862 | Qfontification_functions = intern ("fontification-functions"); | |
14863 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
14864 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
14865 | staticpro (&Qtrailing_whitespace); | |
14866 | Qimage = intern ("image"); | |
14867 | staticpro (&Qimage); | |
ad4f174e GM |
14868 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
14869 | staticpro (&Qmessage_truncate_lines); | |
af79bccb RS |
14870 | Qcursor_in_non_selected_windows = intern ("cursor-in-non-selected-windows"); |
14871 | staticpro (&Qcursor_in_non_selected_windows); | |
6422c1d7 GM |
14872 | Qgrow_only = intern ("grow-only"); |
14873 | staticpro (&Qgrow_only); | |
e1477f43 GM |
14874 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
14875 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
14876 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
14877 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
14878 | Qposition = intern ("position"); |
14879 | staticpro (&Qposition); | |
14880 | Qbuffer_position = intern ("buffer-position"); | |
14881 | staticpro (&Qbuffer_position); | |
14882 | Qobject = intern ("object"); | |
14883 | staticpro (&Qobject); | |
5f5c8ee5 | 14884 | |
a2889657 JB |
14885 | last_arrow_position = Qnil; |
14886 | last_arrow_string = Qnil; | |
f3751a65 GM |
14887 | staticpro (&last_arrow_position); |
14888 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
14889 | |
14890 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
14891 | staticpro (&echo_buffer[0]); | |
14892 | staticpro (&echo_buffer[1]); | |
14893 | ||
14894 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
14895 | staticpro (&echo_area_buffer[0]); | |
14896 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 14897 | |
6a94510a GM |
14898 | Vmessages_buffer_name = build_string ("*Messages*"); |
14899 | staticpro (&Vmessages_buffer_name); | |
0fcf414f RS |
14900 | |
14901 | mode_line_proptrans_alist = Qnil; | |
14902 | staticpro (&mode_line_proptrans_alist); | |
6a94510a | 14903 | |
7ee72033 MB |
14904 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
14905 | doc: /* Non-nil means highlight trailing whitespace. | |
228299fa | 14906 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
14907 | Vshow_trailing_whitespace = Qnil; |
14908 | ||
7ee72033 MB |
14909 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
14910 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 14911 | This is used for internal purposes. */); |
735c094c KH |
14912 | Vinhibit_redisplay = Qnil; |
14913 | ||
7ee72033 MB |
14914 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
14915 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
14916 | Vglobal_mode_string = Qnil; |
14917 | ||
7ee72033 MB |
14918 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
14919 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
14920 | This must be the beginning of a line in order to work. |
14921 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
14922 | Voverlay_arrow_position = Qnil; |
14923 | ||
7ee72033 MB |
14924 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
14925 | doc: /* String to display as an arrow. See also `overlay-arrow-position'. */); | |
a2889657 JB |
14926 | Voverlay_arrow_string = Qnil; |
14927 | ||
7ee72033 MB |
14928 | DEFVAR_INT ("scroll-step", &scroll_step, |
14929 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
14930 | If that fails to bring point back on frame, point is centered instead. |
14931 | If this is zero, point is always centered after it moves off frame. | |
14932 | If you want scrolling to always be a line at a time, you should set | |
14933 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
14934 | ||
7ee72033 MB |
14935 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
14936 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
14937 | A value of zero means to scroll the text to center point vertically |
14938 | in the window. */); | |
0789adb2 RS |
14939 | scroll_conservatively = 0; |
14940 | ||
7ee72033 MB |
14941 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
14942 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
14943 | Recenter the window whenever point gets within this many lines |
14944 | of the top or bottom of the window. */); | |
9afd2168 RS |
14945 | scroll_margin = 0; |
14946 | ||
5f5c8ee5 | 14947 | #if GLYPH_DEBUG |
7ee72033 | 14948 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 14949 | #endif |
a2889657 JB |
14950 | |
14951 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
14952 | &truncate_partial_width_windows, |
14953 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
14954 | truncate_partial_width_windows = 1; |
14955 | ||
7ee72033 MB |
14956 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
14957 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa GM |
14958 | Any other value means to use the appropriate face, `mode-line', |
14959 | `header-line', or `menu' respectively. | |
14960 | ||
14961 | This variable is deprecated; please change the above faces instead. */); | |
1862a24e | 14962 | mode_line_inverse_video = 1; |
aa6d10fa | 14963 | |
7ee72033 MB |
14964 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
14965 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
14966 | If the buffer is bigger than this, the line number does not appear |
14967 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 14968 | Vline_number_display_limit = Qnil; |
fba9ce76 | 14969 | |
090703f4 | 14970 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
14971 | &line_number_display_limit_width, |
14972 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
14973 | If the average length of the lines near point is bigger than this, then the |
14974 | line number may be omitted from the mode line. */); | |
5d121aec KH |
14975 | line_number_display_limit_width = 200; |
14976 | ||
7ee72033 MB |
14977 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
14978 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 14979 | highlight_nonselected_windows = 0; |
d39b6696 | 14980 | |
7ee72033 MB |
14981 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
14982 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
14983 | Minibuffer-only frames don't count, but iconified frames do. |
14984 | This variable is not guaranteed to be accurate except while processing | |
14985 | `frame-title-format' and `icon-title-format'. */); | |
14986 | ||
7ee72033 MB |
14987 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
14988 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
14989 | \(Assuming the window manager supports this feature.) |
14990 | This variable has the same structure as `mode-line-format' (which see), | |
14991 | and is used only on frames for which no explicit name has been set | |
14992 | \(see `modify-frame-parameters'). */); | |
7ee72033 MB |
14993 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
14994 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
14995 | \(Assuming the window manager supports this feature.) |
14996 | This variable has the same structure as `mode-line-format' (which see), | |
14997 | and is used only on frames for which no explicit name has been set | |
14998 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
14999 | Vicon_title_format |
15000 | = Vframe_title_format | |
15001 | = Fcons (intern ("multiple-frames"), | |
15002 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 15003 | Fcons (Fcons (empty_string, |
d39b6696 KH |
15004 | Fcons (intern ("invocation-name"), |
15005 | Fcons (build_string ("@"), | |
15006 | Fcons (intern ("system-name"), | |
15007 | Qnil)))), | |
15008 | Qnil))); | |
5992c4f7 | 15009 | |
7ee72033 MB |
15010 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
15011 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
15012 | If nil, disable message logging. If t, log messages but don't truncate |
15013 | the buffer when it becomes large. */); | |
ac90c44f | 15014 | Vmessage_log_max = make_number (50); |
08b610e4 | 15015 | |
7ee72033 MB |
15016 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
15017 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
15018 | The value should be a list of functions that take one argument. |
15019 | Just before redisplay, for each frame, if any of its windows have changed | |
15020 | size since the last redisplay, or have been split or deleted, | |
15021 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 15022 | Vwindow_size_change_functions = Qnil; |
75c43375 | 15023 | |
7ee72033 MB |
15024 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
15025 | doc: /* List of Functions to call before redisplaying a window with scrolling. | |
228299fa GM |
15026 | Each function is called with two arguments, the window |
15027 | and its new display-start position. Note that the value of `window-end' | |
15028 | is not valid when these functions are called. */); | |
75c43375 | 15029 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 15030 | |
7ee72033 MB |
15031 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
15032 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
15033 | This increases a tool-bar's height if not all tool-bar items are visible. |
15034 | It decreases a tool-bar's height when it would display blank lines | |
15035 | otherwise. */); | |
e037b9ec | 15036 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 15037 | |
7ee72033 MB |
15038 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
15039 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 15040 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 15041 | |
7ee72033 MB |
15042 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
15043 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa | 15044 | If an integer, use that for both horizontal and vertical margins. |
f6c89f27 | 15045 | Otherwise, value should be a pair of integers `(HORZ . VERT)' with |
228299fa GM |
15046 | HORZ specifying the horizontal margin, and VERT specifying the |
15047 | vertical margin. */); | |
c3d76173 | 15048 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 15049 | |
7ee72033 | 15050 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
6da3c85b | 15051 | doc: /* *Relief thickness of tool-bar buttons. */); |
c3d76173 | 15052 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 15053 | |
7ee72033 MB |
15054 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
15055 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
15056 | Each function is called with one argument POS. Functions must |
15057 | fontify a region starting at POS in the current buffer, and give | |
15058 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 15059 | Vfontification_functions = Qnil; |
6b9f0906 | 15060 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
15061 | |
15062 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
15063 | &unibyte_display_via_language_environment, |
15064 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
15065 | Specifically this means that unibyte non-ASCII characters |
15066 | are displayed by converting them to the equivalent multibyte characters | |
15067 | according to the current language environment. As a result, they are | |
15068 | displayed according to the current fontset. */); | |
7bbe686f | 15069 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 15070 | |
7ee72033 MB |
15071 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
15072 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
15073 | If a float, it specifies a fraction of the mini-window frame's height. |
15074 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 15075 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 15076 | |
7ee72033 MB |
15077 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
15078 | doc: /* *How to resize mini-windows. | |
228299fa GM |
15079 | A value of nil means don't automatically resize mini-windows. |
15080 | A value of t means resize them to fit the text displayed in them. | |
15081 | A value of `grow-only', the default, means let mini-windows grow | |
15082 | only, until their display becomes empty, at which point the windows | |
15083 | go back to their normal size. */); | |
6422c1d7 GM |
15084 | Vresize_mini_windows = Qgrow_only; |
15085 | ||
d6d26ed3 | 15086 | DEFVAR_BOOL ("cursor-in-non-selected-windows", |
7ee72033 MB |
15087 | &cursor_in_non_selected_windows, |
15088 | doc: /* *Non-nil means display a hollow cursor in non-selected windows. | |
f0529b5b | 15089 | nil means don't display a cursor there. */); |
d6d26ed3 | 15090 | cursor_in_non_selected_windows = 1; |
d475bcb8 | 15091 | |
e76d28d5 | 15092 | DEFVAR_BOOL ("auto-hscroll-mode", &automatic_hscrolling_p, |
7ee72033 | 15093 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); |
d475bcb8 | 15094 | automatic_hscrolling_p = 1; |
1df7e8f0 | 15095 | |
e76d28d5 | 15096 | DEFVAR_INT ("hscroll-margin", &hscroll_margin, |
1df7e8f0 EZ |
15097 | doc: /* *How many columns away from the window edge point is allowed to get |
15098 | before automatic hscrolling will horizontally scroll the window. */); | |
e76d28d5 | 15099 | hscroll_margin = 5; |
1df7e8f0 | 15100 | |
e76d28d5 | 15101 | DEFVAR_LISP ("hscroll-step", &Vhscroll_step, |
1df7e8f0 EZ |
15102 | doc: /* *How many columns to scroll the window when point gets too close to the edge. |
15103 | When point is less than `automatic-hscroll-margin' columns from the window | |
15104 | edge, automatic hscrolling will scroll the window by the amount of columns | |
15105 | determined by this variable. If its value is a positive integer, scroll that | |
15106 | many columns. If it's a positive floating-point number, it specifies the | |
15107 | fraction of the window's width to scroll. If it's nil or zero, point will be | |
15108 | centered horizontally after the scroll. Any other value, including negative | |
15109 | numbers, are treated as if the value were zero. | |
15110 | ||
15111 | Automatic hscrolling always moves point outside the scroll margin, so if | |
15112 | point was more than scroll step columns inside the margin, the window will | |
15113 | scroll more than the value given by the scroll step. | |
15114 | ||
15115 | Note that the lower bound for automatic hscrolling specified by `scroll-left' | |
15116 | and `scroll-right' overrides this variable's effect. */); | |
e76d28d5 | 15117 | Vhscroll_step = make_number (0); |
e00daaa0 | 15118 | |
7ee72033 MB |
15119 | DEFVAR_LISP ("image-types", &Vimage_types, |
15120 | doc: /* List of supported image types. | |
228299fa | 15121 | Each element of the list is a symbol for a supported image type. */); |
e00daaa0 | 15122 | Vimage_types = Qnil; |
ad4f174e | 15123 | |
7ee72033 MB |
15124 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
15125 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 15126 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 15127 | message_truncate_lines = 0; |
0bca8940 | 15128 | |
7ee72033 MB |
15129 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
15130 | doc: /* Normal hook run for clicks on menu bar, before displaying a submenu. | |
228299fa | 15131 | Can be used to update submenus whose contents should vary. */); |
6422c1d7 | 15132 | Vmenu_bar_update_hook = Qnil; |
e1477f43 | 15133 | |
7ee72033 MB |
15134 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
15135 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 15136 | inhibit_menubar_update = 0; |
30a3f61c | 15137 | |
7ee72033 MB |
15138 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
15139 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 15140 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 15141 | |
69d1f7c9 | 15142 | #if GLYPH_DEBUG |
76cb5e06 GM |
15143 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
15144 | doc: /* Inhibit try_window_id display optimization. */); | |
15145 | inhibit_try_window_id = 0; | |
15146 | ||
15147 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
15148 | doc: /* Inhibit try_window_reusing display optimization. */); | |
15149 | inhibit_try_window_reusing = 0; | |
15150 | ||
15151 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
15152 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
15153 | inhibit_try_cursor_movement = 0; | |
15154 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
15155 | } |
15156 | ||
5f5c8ee5 GM |
15157 | |
15158 | /* Initialize this module when Emacs starts. */ | |
15159 | ||
dfcf069d | 15160 | void |
a2889657 JB |
15161 | init_xdisp () |
15162 | { | |
15163 | Lisp_Object root_window; | |
5f5c8ee5 | 15164 | struct window *mini_w; |
a2889657 | 15165 | |
04612a64 GM |
15166 | current_header_line_height = current_mode_line_height = -1; |
15167 | ||
5f5c8ee5 | 15168 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
15169 | |
15170 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 15171 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 15172 | |
a2889657 JB |
15173 | if (!noninteractive) |
15174 | { | |
5f5c8ee5 GM |
15175 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
15176 | int i; | |
15177 | ||
ac90c44f | 15178 | XWINDOW (root_window)->top = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 15179 | set_window_height (root_window, |
5f5c8ee5 | 15180 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 15181 | 0); |
ac90c44f | 15182 | mini_w->top = make_number (FRAME_HEIGHT (f) - 1); |
a2889657 JB |
15183 | set_window_height (minibuf_window, 1, 0); |
15184 | ||
ac90c44f GM |
15185 | XWINDOW (root_window)->width = make_number (FRAME_WIDTH (f)); |
15186 | mini_w->width = make_number (FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
15187 | |
15188 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
15189 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
15190 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
15191 | ||
15192 | /* The default ellipsis glyphs `...'. */ | |
15193 | for (i = 0; i < 3; ++i) | |
ac90c44f | 15194 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 15195 | } |
5f5c8ee5 GM |
15196 | |
15197 | #ifdef HAVE_WINDOW_SYSTEM | |
15198 | { | |
15199 | /* Allocate the buffer for frame titles. */ | |
15200 | int size = 100; | |
15201 | frame_title_buf = (char *) xmalloc (size); | |
15202 | frame_title_buf_end = frame_title_buf + size; | |
15203 | frame_title_ptr = NULL; | |
15204 | } | |
15205 | #endif /* HAVE_WINDOW_SYSTEM */ | |
21fdfb65 GM |
15206 | |
15207 | help_echo_showing_p = 0; | |
a2889657 | 15208 | } |
5f5c8ee5 GM |
15209 | |
15210 |