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a2889657 | 1 | /* Display generation from window structure and buffer text. |
098ec84a | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99, 2000, 2001 |
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 |
5f5c8ee5 GM |
37 | operations, below.). |
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 | |
55 | +--------------+ redisplay() +----------------+ | |
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; |
9499d71b | 223 | Lisp_Object QCeval, Qwhen, QCfile, QCdata; |
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 | |
e037b9ec | 245 | 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 DL |
262 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
263 | extern Lisp_Object Qface, Qinvisible, Qimage, 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 | |
5f5c8ee5 GM |
294 | \f |
295 | /* The buffer position of the first character appearing entirely or | |
296 | partially on the line of the selected window which contains the | |
297 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
298 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 299 | |
5f5c8ee5 | 300 | static struct text_pos this_line_start_pos; |
a2889657 | 301 | |
5f5c8ee5 GM |
302 | /* Number of characters past the end of the line above, including the |
303 | terminating newline. */ | |
304 | ||
305 | static struct text_pos this_line_end_pos; | |
306 | ||
307 | /* The vertical positions and the height of this line. */ | |
a2889657 | 308 | |
a2889657 | 309 | static int this_line_vpos; |
5f5c8ee5 GM |
310 | static int this_line_y; |
311 | static int this_line_pixel_height; | |
312 | ||
313 | /* X position at which this display line starts. Usually zero; | |
314 | negative if first character is partially visible. */ | |
315 | ||
316 | static int this_line_start_x; | |
a2889657 | 317 | |
5f5c8ee5 | 318 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 319 | |
a2889657 JB |
320 | static struct buffer *this_line_buffer; |
321 | ||
5f5c8ee5 GM |
322 | /* Nonzero means truncate lines in all windows less wide than the |
323 | frame. */ | |
a2889657 | 324 | |
a2889657 JB |
325 | int truncate_partial_width_windows; |
326 | ||
7bbe686f | 327 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 328 | |
7bbe686f | 329 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
330 | |
331 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
332 | Not guaranteed to be accurate except while parsing | |
333 | frame-title-format. */ | |
7bbe686f | 334 | |
d39b6696 KH |
335 | int multiple_frames; |
336 | ||
a2889657 JB |
337 | Lisp_Object Vglobal_mode_string; |
338 | ||
339 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 340 | |
a2889657 JB |
341 | Lisp_Object Voverlay_arrow_position; |
342 | ||
5f5c8ee5 GM |
343 | /* String to display for the arrow. Only used on terminal frames. */ |
344 | ||
a2889657 JB |
345 | Lisp_Object Voverlay_arrow_string; |
346 | ||
5f5c8ee5 GM |
347 | /* Values of those variables at last redisplay. However, if |
348 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
349 | numerical position. */ | |
350 | ||
d45de95b RS |
351 | static Lisp_Object last_arrow_position, last_arrow_string; |
352 | ||
5f5c8ee5 GM |
353 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
354 | ||
d39b6696 KH |
355 | Lisp_Object Vframe_title_format; |
356 | ||
5f5c8ee5 GM |
357 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
358 | ||
d39b6696 KH |
359 | Lisp_Object Vicon_title_format; |
360 | ||
08b610e4 RS |
361 | /* List of functions to call when a window's size changes. These |
362 | functions get one arg, a frame on which one or more windows' sizes | |
363 | have changed. */ | |
5f5c8ee5 | 364 | |
08b610e4 RS |
365 | static Lisp_Object Vwindow_size_change_functions; |
366 | ||
0bca8940 | 367 | Lisp_Object Qmenu_bar_update_hook, Vmenu_bar_update_hook; |
cf074754 | 368 | |
a2889657 | 369 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 370 | |
5f5c8ee5 | 371 | static int overlay_arrow_seen; |
ca26e1c8 | 372 | |
fba9ce76 | 373 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 374 | |
5f5c8ee5 GM |
375 | int highlight_nonselected_windows; |
376 | ||
377 | /* If cursor motion alone moves point off frame, try scrolling this | |
378 | many lines up or down if that will bring it back. */ | |
379 | ||
14510fee | 380 | static int scroll_step; |
a2889657 | 381 | |
5f5c8ee5 GM |
382 | /* Non-0 means scroll just far enough to bring point back on the |
383 | screen, when appropriate. */ | |
384 | ||
0789adb2 RS |
385 | static int scroll_conservatively; |
386 | ||
5f5c8ee5 GM |
387 | /* Recenter the window whenever point gets within this many lines of |
388 | the top or bottom of the window. This value is translated into a | |
389 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
390 | there is really a fixed pixel height scroll margin. */ | |
391 | ||
9afd2168 RS |
392 | int scroll_margin; |
393 | ||
5f5c8ee5 GM |
394 | /* Number of windows showing the buffer of the selected window (or |
395 | another buffer with the same base buffer). keyboard.c refers to | |
396 | this. */ | |
a2889657 | 397 | |
a2889657 JB |
398 | int buffer_shared; |
399 | ||
5f5c8ee5 | 400 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 401 | |
5f5c8ee5 | 402 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 403 | |
1862a24e MB |
404 | /* Zero means display the mode-line/header-line/menu-bar in the default face |
405 | (this slightly odd definition is for compatibility with previous versions | |
406 | of emacs), non-zero means display them using their respective faces. | |
407 | ||
408 | This variable is deprecated. */ | |
a2889657 | 409 | |
a2889657 JB |
410 | int mode_line_inverse_video; |
411 | ||
5f5c8ee5 GM |
412 | /* Prompt to display in front of the mini-buffer contents. */ |
413 | ||
8c5b6a0a | 414 | Lisp_Object minibuf_prompt; |
a2889657 | 415 | |
5f5c8ee5 GM |
416 | /* Width of current mini-buffer prompt. Only set after display_line |
417 | of the line that contains the prompt. */ | |
418 | ||
a2889657 | 419 | int minibuf_prompt_width; |
5f5c8ee5 GM |
420 | int minibuf_prompt_pixel_width; |
421 | ||
5f5c8ee5 GM |
422 | /* This is the window where the echo area message was displayed. It |
423 | is always a mini-buffer window, but it may not be the same window | |
424 | currently active as a mini-buffer. */ | |
425 | ||
73af359d RS |
426 | Lisp_Object echo_area_window; |
427 | ||
c6e89d6c GM |
428 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
429 | pushes the current message and the value of | |
430 | message_enable_multibyte on the stack, the function restore_message | |
431 | pops the stack and displays MESSAGE again. */ | |
432 | ||
433 | Lisp_Object Vmessage_stack; | |
434 | ||
a3788d53 RS |
435 | /* Nonzero means multibyte characters were enabled when the echo area |
436 | message was specified. */ | |
5f5c8ee5 | 437 | |
a3788d53 RS |
438 | int message_enable_multibyte; |
439 | ||
5f5c8ee5 GM |
440 | /* True if we should redraw the mode lines on the next redisplay. */ |
441 | ||
a2889657 JB |
442 | int update_mode_lines; |
443 | ||
5f5c8ee5 GM |
444 | /* Nonzero if window sizes or contents have changed since last |
445 | redisplay that finished */ | |
446 | ||
a2889657 JB |
447 | int windows_or_buffers_changed; |
448 | ||
5f5c8ee5 GM |
449 | /* Nonzero after display_mode_line if %l was used and it displayed a |
450 | line number. */ | |
451 | ||
aa6d10fa RS |
452 | int line_number_displayed; |
453 | ||
454 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 455 | |
090703f4 | 456 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 457 | |
5d121aec KH |
458 | /* line width to consider when repostioning for line number display */ |
459 | ||
460 | static int line_number_display_limit_width; | |
461 | ||
5f5c8ee5 GM |
462 | /* Number of lines to keep in the message log buffer. t means |
463 | infinite. nil means don't log at all. */ | |
464 | ||
5992c4f7 | 465 | Lisp_Object Vmessage_log_max; |
d45de95b | 466 | |
6a94510a GM |
467 | /* The name of the *Messages* buffer, a string. */ |
468 | ||
469 | static Lisp_Object Vmessages_buffer_name; | |
470 | ||
c6e89d6c GM |
471 | /* Current, index 0, and last displayed echo area message. Either |
472 | buffers from echo_buffers, or nil to indicate no message. */ | |
473 | ||
474 | Lisp_Object echo_area_buffer[2]; | |
475 | ||
476 | /* The buffers referenced from echo_area_buffer. */ | |
477 | ||
478 | static Lisp_Object echo_buffer[2]; | |
479 | ||
480 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
481 | ||
482 | static Lisp_Object Vwith_echo_area_save_vector; | |
483 | ||
484 | /* Non-zero means display_echo_area should display the last echo area | |
485 | message again. Set by redisplay_preserve_echo_area. */ | |
486 | ||
487 | static int display_last_displayed_message_p; | |
488 | ||
489 | /* Nonzero if echo area is being used by print; zero if being used by | |
490 | message. */ | |
491 | ||
492 | int message_buf_print; | |
493 | ||
e1477f43 GM |
494 | /* The symbol `inhibit-menubar-update' and its DEFVAR_BOOL variable. */ |
495 | ||
496 | Lisp_Object Qinhibit_menubar_update; | |
497 | int inhibit_menubar_update; | |
498 | ||
9142dd5b GM |
499 | /* Maximum height for resizing mini-windows. Either a float |
500 | specifying a fraction of the available height, or an integer | |
501 | specifying a number of lines. */ | |
c6e89d6c | 502 | |
ad4f174e GM |
503 | Lisp_Object Vmax_mini_window_height; |
504 | ||
505 | /* Non-zero means messages should be displayed with truncated | |
506 | lines instead of being continued. */ | |
507 | ||
508 | int message_truncate_lines; | |
509 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 510 | |
6e019995 GM |
511 | /* Set to 1 in clear_message to make redisplay_internal aware |
512 | of an emptied echo area. */ | |
513 | ||
514 | static int message_cleared_p; | |
515 | ||
d6d26ed3 GM |
516 | /* Non-zero means we want a hollow cursor in windows that are not |
517 | selected. Zero means there's no cursor in such windows. */ | |
518 | ||
519 | int cursor_in_non_selected_windows; | |
af79bccb | 520 | Lisp_Object Qcursor_in_non_selected_windows; |
d6d26ed3 | 521 | |
5f5c8ee5 GM |
522 | /* A scratch glyph row with contents used for generating truncation |
523 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 524 | |
5f5c8ee5 GM |
525 | #define MAX_SCRATCH_GLYPHS 100 |
526 | struct glyph_row scratch_glyph_row; | |
527 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 528 | |
5f5c8ee5 GM |
529 | /* Ascent and height of the last line processed by move_it_to. */ |
530 | ||
531 | static int last_max_ascent, last_height; | |
532 | ||
21fdfb65 GM |
533 | /* Non-zero if there's a help-echo in the echo area. */ |
534 | ||
535 | int help_echo_showing_p; | |
536 | ||
04612a64 GM |
537 | /* If >= 0, computed, exact values of mode-line and header-line height |
538 | to use in the macros CURRENT_MODE_LINE_HEIGHT and | |
539 | CURRENT_HEADER_LINE_HEIGHT. */ | |
540 | ||
541 | int current_mode_line_height, current_header_line_height; | |
542 | ||
5f5c8ee5 GM |
543 | /* The maximum distance to look ahead for text properties. Values |
544 | that are too small let us call compute_char_face and similar | |
545 | functions too often which is expensive. Values that are too large | |
546 | let us call compute_char_face and alike too often because we | |
547 | might not be interested in text properties that far away. */ | |
548 | ||
549 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
550 | ||
47589c8c GM |
551 | #if GLYPH_DEBUG |
552 | ||
76cb5e06 GM |
553 | /* Variables to turn off display optimizations from Lisp. */ |
554 | ||
555 | int inhibit_try_window_id, inhibit_try_window_reusing; | |
556 | int inhibit_try_cursor_movement; | |
557 | ||
5f5c8ee5 GM |
558 | /* Non-zero means print traces of redisplay if compiled with |
559 | GLYPH_DEBUG != 0. */ | |
560 | ||
5f5c8ee5 | 561 | int trace_redisplay_p; |
47589c8c | 562 | |
546a4f00 | 563 | #endif /* GLYPH_DEBUG */ |
47589c8c | 564 | |
546a4f00 AI |
565 | #ifdef DEBUG_TRACE_MOVE |
566 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
567 | int trace_move; |
568 | ||
47589c8c GM |
569 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
570 | #else | |
91c3f500 | 571 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 572 | #endif |
546a4f00 | 573 | |
d475bcb8 GM |
574 | /* Non-zero means automatically scroll windows horizontally to make |
575 | point visible. */ | |
576 | ||
577 | int automatic_hscrolling_p; | |
578 | ||
e00daaa0 GM |
579 | /* A list of symbols, one for each supported image type. */ |
580 | ||
581 | Lisp_Object Vimage_types; | |
582 | ||
6422c1d7 | 583 | /* The variable `resize-mini-windows'. If nil, don't resize |
67526daf | 584 | mini-windows. If t, always resize them to fit the text they |
6422c1d7 GM |
585 | display. If `grow-only', let mini-windows grow only until they |
586 | become empty. */ | |
587 | ||
588 | Lisp_Object Vresize_mini_windows; | |
589 | ||
5f5c8ee5 GM |
590 | /* Value returned from text property handlers (see below). */ |
591 | ||
592 | enum prop_handled | |
3c6595e0 | 593 | { |
5f5c8ee5 GM |
594 | HANDLED_NORMALLY, |
595 | HANDLED_RECOMPUTE_PROPS, | |
596 | HANDLED_OVERLAY_STRING_CONSUMED, | |
597 | HANDLED_RETURN | |
598 | }; | |
3c6595e0 | 599 | |
5f5c8ee5 GM |
600 | /* A description of text properties that redisplay is interested |
601 | in. */ | |
3c6595e0 | 602 | |
5f5c8ee5 GM |
603 | struct props |
604 | { | |
605 | /* The name of the property. */ | |
606 | Lisp_Object *name; | |
90adcf20 | 607 | |
5f5c8ee5 GM |
608 | /* A unique index for the property. */ |
609 | enum prop_idx idx; | |
610 | ||
611 | /* A handler function called to set up iterator IT from the property | |
612 | at IT's current position. Value is used to steer handle_stop. */ | |
613 | enum prop_handled (*handler) P_ ((struct it *it)); | |
614 | }; | |
615 | ||
616 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
617 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
618 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 619 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
620 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
621 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
622 | ||
623 | /* Properties handled by iterators. */ | |
624 | ||
625 | static struct props it_props[] = | |
5992c4f7 | 626 | { |
5f5c8ee5 GM |
627 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
628 | /* Handle `face' before `display' because some sub-properties of | |
629 | `display' need to know the face. */ | |
630 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
631 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
632 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 633 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
634 | {NULL, 0, NULL} |
635 | }; | |
5992c4f7 | 636 | |
5f5c8ee5 GM |
637 | /* Value is the position described by X. If X is a marker, value is |
638 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 639 | |
5f5c8ee5 | 640 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 641 | |
5f5c8ee5 | 642 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 643 | |
5f5c8ee5 GM |
644 | enum move_it_result |
645 | { | |
646 | /* Not used. Undefined value. */ | |
647 | MOVE_UNDEFINED, | |
bab29e15 | 648 | |
5f5c8ee5 GM |
649 | /* Move ended at the requested buffer position or ZV. */ |
650 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 651 | |
5f5c8ee5 GM |
652 | /* Move ended at the requested X pixel position. */ |
653 | MOVE_X_REACHED, | |
12adba34 | 654 | |
5f5c8ee5 GM |
655 | /* Move within a line ended at the end of a line that must be |
656 | continued. */ | |
657 | MOVE_LINE_CONTINUED, | |
658 | ||
659 | /* Move within a line ended at the end of a line that would | |
660 | be displayed truncated. */ | |
661 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 662 | |
5f5c8ee5 GM |
663 | /* Move within a line ended at a line end. */ |
664 | MOVE_NEWLINE_OR_CR | |
665 | }; | |
12adba34 | 666 | |
ff6c30e5 | 667 | |
5f5c8ee5 GM |
668 | \f |
669 | /* Function prototypes. */ | |
670 | ||
5a08cbaf | 671 | static void setup_for_ellipsis P_ ((struct it *)); |
43c09969 | 672 | static void mark_window_display_accurate_1 P_ ((struct window *, int)); |
74bd6d65 GM |
673 | static int single_display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); |
674 | static int display_prop_string_p P_ ((Lisp_Object, Lisp_Object)); | |
cafafe0b | 675 | static int cursor_row_p P_ ((struct window *, struct glyph_row *)); |
715e84c9 | 676 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 | 677 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
c0a53abb PJ |
678 | |
679 | #if 0 | |
2e621225 | 680 | static int invisible_text_between_p P_ ((struct it *, int, int)); |
c0a53abb PJ |
681 | #endif |
682 | ||
2e621225 GM |
683 | static int next_element_from_ellipsis P_ ((struct it *)); |
684 | static void pint2str P_ ((char *, int, int)); | |
685 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
686 | struct text_pos)); | |
687 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
688 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
689 | static void store_frame_title_char P_ ((char)); | |
690 | static int store_frame_title P_ ((unsigned char *, int, int)); | |
691 | static void x_consider_frame_title P_ ((Lisp_Object)); | |
692 | static void handle_stop P_ ((struct it *)); | |
693 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 694 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 695 | static void ensure_echo_area_buffers P_ ((void)); |
c6e89d6c GM |
696 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
697 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 698 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
699 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
700 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 701 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
702 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
703 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
704 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 705 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
706 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
707 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 708 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 709 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
710 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
711 | struct text_pos)); | |
712 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
116d6f5c | 713 | static Lisp_Object safe_eval_handler P_ ((Lisp_Object)); |
5f5c8ee5 GM |
714 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
715 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
716 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 717 | static int append_space P_ ((struct it *, int)); |
cb617e7c | 718 | static int make_cursor_line_fully_visible P_ ((struct window *)); |
5f5c8ee5 | 719 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); |
47589c8c | 720 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
721 | static int trailing_whitespace_p P_ ((int)); |
722 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
5f5c8ee5 GM |
723 | static void push_it P_ ((struct it *)); |
724 | static void pop_it P_ ((struct it *)); | |
725 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
726 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 727 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
728 | static void redisplay_windows P_ ((Lisp_Object)); |
729 | static void redisplay_window P_ ((Lisp_Object, int)); | |
730 | static void update_menu_bar P_ ((struct frame *, int)); | |
731 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
732 | static int try_window_id P_ ((struct window *)); | |
733 | static int display_line P_ ((struct it *)); | |
715e84c9 | 734 | static int display_mode_lines P_ ((struct window *)); |
04612a64 | 735 | static int display_mode_line P_ ((struct window *, enum face_id, Lisp_Object)); |
5f5c8ee5 | 736 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); |
72f62cb5 | 737 | static char *decode_mode_spec P_ ((struct window *, int, int, int, int *)); |
5f5c8ee5 GM |
738 | static void display_menu_bar P_ ((struct window *)); |
739 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
740 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
741 | int, int, struct it *, int, int, int, int)); | |
742 | static void compute_line_metrics P_ ((struct it *)); | |
743 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
5a08cbaf | 744 | static int get_overlay_strings P_ ((struct it *, int)); |
5f5c8ee5 | 745 | static void next_overlay_string P_ ((struct it *)); |
5f5c8ee5 GM |
746 | static void reseat P_ ((struct it *, struct text_pos, int)); |
747 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
748 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
749 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 750 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
751 | static int next_element_from_display_vector P_ ((struct it *)); |
752 | static int next_element_from_string P_ ((struct it *)); | |
753 | static int next_element_from_c_string P_ ((struct it *)); | |
754 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 755 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
756 | static int next_element_from_image P_ ((struct it *)); |
757 | static int next_element_from_stretch P_ ((struct it *)); | |
5a08cbaf | 758 | static void load_overlay_strings P_ ((struct it *, int)); |
47d57b22 GM |
759 | static int init_from_display_pos P_ ((struct it *, struct window *, |
760 | struct display_pos *)); | |
5f5c8ee5 GM |
761 | static void reseat_to_string P_ ((struct it *, unsigned char *, |
762 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
763 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
764 | int, int, int)); | |
765 | void move_it_vertically_backward P_ ((struct it *, int)); | |
766 | static void init_to_row_start P_ ((struct it *, struct window *, | |
767 | struct glyph_row *)); | |
47d57b22 GM |
768 | static int init_to_row_end P_ ((struct it *, struct window *, |
769 | struct glyph_row *)); | |
5f5c8ee5 | 770 | static void back_to_previous_line_start P_ ((struct it *)); |
cafafe0b | 771 | static int forward_to_next_line_start P_ ((struct it *, int *)); |
5f5c8ee5 GM |
772 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, |
773 | Lisp_Object, int)); | |
774 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
775 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
776 | static int number_of_chars P_ ((unsigned char *, int)); | |
777 | static void compute_stop_pos P_ ((struct it *)); | |
778 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
779 | Lisp_Object)); | |
780 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
781 | static int next_overlay_change P_ ((int)); | |
782 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
a61b7058 GM |
783 | Lisp_Object, struct text_pos *, |
784 | int)); | |
06a12811 | 785 | static int underlying_face_id P_ ((struct it *)); |
4bde0ebb GM |
786 | static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *, |
787 | struct window *)); | |
5f5c8ee5 GM |
788 | |
789 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
790 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 791 | |
5f5c8ee5 | 792 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 793 | |
e037b9ec GM |
794 | static void update_tool_bar P_ ((struct frame *, int)); |
795 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
796 | static int redisplay_tool_bar P_ ((struct frame *)); | |
797 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 798 | |
5f5c8ee5 | 799 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 800 | |
5f5c8ee5 GM |
801 | \f |
802 | /*********************************************************************** | |
803 | Window display dimensions | |
804 | ***********************************************************************/ | |
12adba34 | 805 | |
5f5c8ee5 GM |
806 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
807 | text in window W. This is the height of W minus the height of a | |
808 | mode line, if any. */ | |
809 | ||
810 | INLINE int | |
811 | window_text_bottom_y (w) | |
812 | struct window *w; | |
813 | { | |
814 | struct frame *f = XFRAME (w->frame); | |
815 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
1a578e9b | 816 | |
5f5c8ee5 GM |
817 | if (WINDOW_WANTS_MODELINE_P (w)) |
818 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
819 | return height; | |
f88eb0b6 KH |
820 | } |
821 | ||
f82aff7c | 822 | |
5f5c8ee5 | 823 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
b46952ae | 824 | means return the total width of W, not including fringes to |
5f5c8ee5 | 825 | the left and right of the window. */ |
ff6c30e5 | 826 | |
5f5c8ee5 GM |
827 | INLINE int |
828 | window_box_width (w, area) | |
829 | struct window *w; | |
830 | int area; | |
831 | { | |
832 | struct frame *f = XFRAME (w->frame); | |
833 | int width = XFASTINT (w->width); | |
834 | ||
835 | if (!w->pseudo_window_p) | |
ff6c30e5 | 836 | { |
b46952ae | 837 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FRINGE_COLS (f); |
5f5c8ee5 GM |
838 | |
839 | if (area == TEXT_AREA) | |
840 | { | |
841 | if (INTEGERP (w->left_margin_width)) | |
842 | width -= XFASTINT (w->left_margin_width); | |
843 | if (INTEGERP (w->right_margin_width)) | |
844 | width -= XFASTINT (w->right_margin_width); | |
845 | } | |
846 | else if (area == LEFT_MARGIN_AREA) | |
847 | width = (INTEGERP (w->left_margin_width) | |
848 | ? XFASTINT (w->left_margin_width) : 0); | |
849 | else if (area == RIGHT_MARGIN_AREA) | |
850 | width = (INTEGERP (w->right_margin_width) | |
851 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 852 | } |
5f5c8ee5 GM |
853 | |
854 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 855 | } |
1adc55de | 856 | |
1adc55de | 857 | |
5f5c8ee5 GM |
858 | /* Return the pixel height of the display area of window W, not |
859 | including mode lines of W, if any.. */ | |
f88eb0b6 | 860 | |
5f5c8ee5 GM |
861 | INLINE int |
862 | window_box_height (w) | |
863 | struct window *w; | |
f88eb0b6 | 864 | { |
5f5c8ee5 GM |
865 | struct frame *f = XFRAME (w->frame); |
866 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
7ecd4937 GM |
867 | |
868 | xassert (height >= 0); | |
5f5c8ee5 | 869 | |
d9c9e99c MB |
870 | /* Note: the code below that determines the mode-line/header-line |
871 | height is essentially the same as that contained in the macro | |
872 | CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether | |
873 | the appropriate glyph row has its `mode_line_p' flag set, | |
874 | and if it doesn't, uses estimate_mode_line_height instead. */ | |
875 | ||
5f5c8ee5 | 876 | if (WINDOW_WANTS_MODELINE_P (w)) |
97dff879 MB |
877 | { |
878 | struct glyph_row *ml_row | |
879 | = (w->current_matrix && w->current_matrix->rows | |
880 | ? MATRIX_MODE_LINE_ROW (w->current_matrix) | |
881 | : 0); | |
882 | if (ml_row && ml_row->mode_line_p) | |
883 | height -= ml_row->height; | |
884 | else | |
885 | height -= estimate_mode_line_height (f, MODE_LINE_FACE_ID); | |
886 | } | |
5f5c8ee5 | 887 | |
045dee35 | 888 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
97dff879 MB |
889 | { |
890 | struct glyph_row *hl_row | |
891 | = (w->current_matrix && w->current_matrix->rows | |
892 | ? MATRIX_HEADER_LINE_ROW (w->current_matrix) | |
893 | : 0); | |
894 | if (hl_row && hl_row->mode_line_p) | |
895 | height -= hl_row->height; | |
896 | else | |
897 | height -= estimate_mode_line_height (f, HEADER_LINE_FACE_ID); | |
898 | } | |
5f5c8ee5 GM |
899 | |
900 | return height; | |
5992c4f7 KH |
901 | } |
902 | ||
903 | ||
5f5c8ee5 GM |
904 | /* Return the frame-relative coordinate of the left edge of display |
905 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 906 | whole window, to the right of the left fringe of W. */ |
5992c4f7 | 907 | |
5f5c8ee5 GM |
908 | INLINE int |
909 | window_box_left (w, area) | |
910 | struct window *w; | |
911 | int area; | |
90adcf20 | 912 | { |
5f5c8ee5 GM |
913 | struct frame *f = XFRAME (w->frame); |
914 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 915 | |
5f5c8ee5 | 916 | if (!w->pseudo_window_p) |
90adcf20 | 917 | { |
5f5c8ee5 | 918 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
b46952ae | 919 | + FRAME_LEFT_FRINGE_WIDTH (f)); |
5f5c8ee5 GM |
920 | |
921 | if (area == TEXT_AREA) | |
922 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
923 | else if (area == RIGHT_MARGIN_AREA) | |
924 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
925 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 926 | } |
73af359d | 927 | |
5f5c8ee5 GM |
928 | return x; |
929 | } | |
90adcf20 | 930 | |
b6436d4e | 931 | |
5f5c8ee5 GM |
932 | /* Return the frame-relative coordinate of the right edge of display |
933 | area AREA of window W. AREA < 0 means return the left edge of the | |
b46952ae | 934 | whole window, to the left of the right fringe of W. */ |
ded34426 | 935 | |
5f5c8ee5 GM |
936 | INLINE int |
937 | window_box_right (w, area) | |
938 | struct window *w; | |
939 | int area; | |
940 | { | |
941 | return window_box_left (w, area) + window_box_width (w, area); | |
942 | } | |
943 | ||
944 | ||
945 | /* Get the bounding box of the display area AREA of window W, without | |
946 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
b46952ae | 947 | whole window, not including the left and right fringes of |
5f5c8ee5 GM |
948 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel |
949 | coordinates of the upper-left corner of the box. Return in | |
950 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
951 | ||
952 | INLINE void | |
953 | window_box (w, area, box_x, box_y, box_width, box_height) | |
954 | struct window *w; | |
955 | int area; | |
956 | int *box_x, *box_y, *box_width, *box_height; | |
957 | { | |
958 | struct frame *f = XFRAME (w->frame); | |
959 | ||
960 | *box_width = window_box_width (w, area); | |
961 | *box_height = window_box_height (w); | |
962 | *box_x = window_box_left (w, area); | |
963 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
964 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
965 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
966 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 967 | } |
1adc55de | 968 | |
1adc55de | 969 | |
5f5c8ee5 | 970 | /* Get the bounding box of the display area AREA of window W, without |
b46952ae KS |
971 | mode lines. AREA < 0 means the whole window, not including the |
972 | left and right fringe of the window. Return in *TOP_LEFT_X | |
5f5c8ee5 GM |
973 | and TOP_LEFT_Y the frame-relative pixel coordinates of the |
974 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
975 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
976 | box. */ | |
ded34426 | 977 | |
5f5c8ee5 GM |
978 | INLINE void |
979 | window_box_edges (w, area, top_left_x, top_left_y, | |
980 | bottom_right_x, bottom_right_y) | |
981 | struct window *w; | |
982 | int area; | |
983 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 984 | { |
5f5c8ee5 GM |
985 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
986 | bottom_right_y); | |
987 | *bottom_right_x += *top_left_x; | |
988 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
989 | } |
990 | ||
5f5c8ee5 GM |
991 | |
992 | \f | |
993 | /*********************************************************************** | |
994 | Utilities | |
995 | ***********************************************************************/ | |
996 | ||
8b6ea97f GM |
997 | /* Return the bottom y-position of the line the iterator IT is in. |
998 | This can modify IT's settings. */ | |
999 | ||
1000 | int | |
1001 | line_bottom_y (it) | |
1002 | struct it *it; | |
1003 | { | |
1004 | int line_height = it->max_ascent + it->max_descent; | |
1005 | int line_top_y = it->current_y; | |
1006 | ||
1007 | if (line_height == 0) | |
1008 | { | |
1009 | if (last_height) | |
1010 | line_height = last_height; | |
1011 | else if (IT_CHARPOS (*it) < ZV) | |
1012 | { | |
1013 | move_it_by_lines (it, 1, 1); | |
1014 | line_height = (it->max_ascent || it->max_descent | |
1015 | ? it->max_ascent + it->max_descent | |
1016 | : last_height); | |
1017 | } | |
1018 | else | |
1019 | { | |
1020 | struct glyph_row *row = it->glyph_row; | |
1021 | ||
1022 | /* Use the default character height. */ | |
1023 | it->glyph_row = NULL; | |
1024 | it->what = IT_CHARACTER; | |
1025 | it->c = ' '; | |
1026 | it->len = 1; | |
1027 | PRODUCE_GLYPHS (it); | |
1028 | line_height = it->ascent + it->descent; | |
1029 | it->glyph_row = row; | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | return line_top_y + line_height; | |
1034 | } | |
1035 | ||
1036 | ||
0db95684 GM |
1037 | /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to |
1038 | 1 if POS is visible and the line containing POS is fully visible. | |
1039 | EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line | |
1040 | and header-lines heights. */ | |
3a641a69 GM |
1041 | |
1042 | int | |
04612a64 | 1043 | pos_visible_p (w, charpos, fully, exact_mode_line_heights_p) |
3a641a69 | 1044 | struct window *w; |
04612a64 | 1045 | int charpos, *fully, exact_mode_line_heights_p; |
3a641a69 GM |
1046 | { |
1047 | struct it it; | |
1048 | struct text_pos top; | |
fcab1954 GM |
1049 | int visible_p; |
1050 | struct buffer *old_buffer = NULL; | |
1051 | ||
1052 | if (XBUFFER (w->buffer) != current_buffer) | |
1053 | { | |
1054 | old_buffer = current_buffer; | |
1055 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1056 | } | |
3a641a69 GM |
1057 | |
1058 | *fully = visible_p = 0; | |
1059 | SET_TEXT_POS_FROM_MARKER (top, w->start); | |
04612a64 GM |
1060 | |
1061 | /* Compute exact mode line heights, if requested. */ | |
1062 | if (exact_mode_line_heights_p) | |
1063 | { | |
1064 | if (WINDOW_WANTS_MODELINE_P (w)) | |
1065 | current_mode_line_height | |
1066 | = display_mode_line (w, MODE_LINE_FACE_ID, | |
1067 | current_buffer->mode_line_format); | |
1068 | ||
1069 | if (WINDOW_WANTS_HEADER_LINE_P (w)) | |
1070 | current_header_line_height | |
1071 | = display_mode_line (w, HEADER_LINE_FACE_ID, | |
1072 | current_buffer->header_line_format); | |
1073 | } | |
3a641a69 | 1074 | |
04612a64 | 1075 | start_display (&it, w, top); |
3a641a69 GM |
1076 | move_it_to (&it, charpos, 0, it.last_visible_y, -1, |
1077 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
a13be207 GM |
1078 | |
1079 | /* Note that we may overshoot because of invisible text. */ | |
1080 | if (IT_CHARPOS (it) >= charpos) | |
3a641a69 | 1081 | { |
8b6ea97f GM |
1082 | int top_y = it.current_y; |
1083 | int bottom_y = line_bottom_y (&it); | |
fcab1954 | 1084 | int window_top_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
3a641a69 | 1085 | |
8b6ea97f GM |
1086 | if (top_y < window_top_y) |
1087 | visible_p = bottom_y > window_top_y; | |
1088 | else if (top_y < it.last_visible_y) | |
fcab1954 GM |
1089 | { |
1090 | visible_p = 1; | |
8b6ea97f | 1091 | *fully = bottom_y <= it.last_visible_y; |
fcab1954 | 1092 | } |
3a641a69 GM |
1093 | } |
1094 | else if (it.current_y + it.max_ascent + it.max_descent > it.last_visible_y) | |
1095 | { | |
1096 | move_it_by_lines (&it, 1, 0); | |
1097 | if (charpos < IT_CHARPOS (it)) | |
1098 | { | |
1099 | visible_p = 1; | |
1100 | *fully = 0; | |
1101 | } | |
1102 | } | |
fcab1954 GM |
1103 | |
1104 | if (old_buffer) | |
1105 | set_buffer_internal_1 (old_buffer); | |
04612a64 GM |
1106 | |
1107 | current_header_line_height = current_mode_line_height = -1; | |
3a641a69 GM |
1108 | return visible_p; |
1109 | } | |
1110 | ||
1111 | ||
4fdb80f2 GM |
1112 | /* Return the next character from STR which is MAXLEN bytes long. |
1113 | Return in *LEN the length of the character. This is like | |
1114 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 1115 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
1116 | character. */ |
1117 | ||
1118 | static INLINE int | |
7a5b8a93 | 1119 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 1120 | unsigned char *str; |
7a5b8a93 | 1121 | int maxlen, *len; |
4fdb80f2 GM |
1122 | { |
1123 | int c; | |
1124 | ||
1125 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
1126 | if (!CHAR_VALID_P (c, 1)) | |
1127 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 1128 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
1129 | characters. */ |
1130 | c = '?'; | |
1131 | ||
1132 | return c; | |
1133 | } | |
1134 | ||
1135 | ||
1136 | ||
5f5c8ee5 GM |
1137 | /* Given a position POS containing a valid character and byte position |
1138 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
1139 | ||
1140 | static struct text_pos | |
1141 | string_pos_nchars_ahead (pos, string, nchars) | |
1142 | struct text_pos pos; | |
1143 | Lisp_Object string; | |
1144 | int nchars; | |
0b1005ef | 1145 | { |
5f5c8ee5 GM |
1146 | xassert (STRINGP (string) && nchars >= 0); |
1147 | ||
1148 | if (STRING_MULTIBYTE (string)) | |
1149 | { | |
1150 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
1151 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
1152 | int len; | |
1153 | ||
1154 | while (nchars--) | |
1155 | { | |
4fdb80f2 | 1156 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1157 | p += len, rest -= len; |
1158 | xassert (rest >= 0); | |
1159 | CHARPOS (pos) += 1; | |
1160 | BYTEPOS (pos) += len; | |
1161 | } | |
1162 | } | |
1163 | else | |
1164 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
1165 | ||
1166 | return pos; | |
0a9dc68b RS |
1167 | } |
1168 | ||
0a9dc68b | 1169 | |
5f5c8ee5 GM |
1170 | /* Value is the text position, i.e. character and byte position, |
1171 | for character position CHARPOS in STRING. */ | |
1172 | ||
1173 | static INLINE struct text_pos | |
1174 | string_pos (charpos, string) | |
1175 | int charpos; | |
0a9dc68b | 1176 | Lisp_Object string; |
0a9dc68b | 1177 | { |
5f5c8ee5 GM |
1178 | struct text_pos pos; |
1179 | xassert (STRINGP (string)); | |
1180 | xassert (charpos >= 0); | |
1181 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
1182 | return pos; | |
1183 | } | |
1184 | ||
1185 | ||
1186 | /* Value is a text position, i.e. character and byte position, for | |
1187 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
1188 | means recognize multibyte characters. */ | |
1189 | ||
1190 | static struct text_pos | |
1191 | c_string_pos (charpos, s, multibyte_p) | |
1192 | int charpos; | |
1193 | unsigned char *s; | |
1194 | int multibyte_p; | |
1195 | { | |
1196 | struct text_pos pos; | |
1197 | ||
1198 | xassert (s != NULL); | |
1199 | xassert (charpos >= 0); | |
1200 | ||
1201 | if (multibyte_p) | |
0a9dc68b | 1202 | { |
5f5c8ee5 GM |
1203 | int rest = strlen (s), len; |
1204 | ||
1205 | SET_TEXT_POS (pos, 0, 0); | |
1206 | while (charpos--) | |
0a9dc68b | 1207 | { |
4fdb80f2 | 1208 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1209 | s += len, rest -= len; |
1210 | xassert (rest >= 0); | |
1211 | CHARPOS (pos) += 1; | |
1212 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1213 | } |
1214 | } | |
5f5c8ee5 GM |
1215 | else |
1216 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1217 | |
5f5c8ee5 GM |
1218 | return pos; |
1219 | } | |
0a9dc68b | 1220 | |
0a9dc68b | 1221 | |
5f5c8ee5 GM |
1222 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1223 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1224 | |
5f5c8ee5 GM |
1225 | static int |
1226 | number_of_chars (s, multibyte_p) | |
1227 | unsigned char *s; | |
1228 | int multibyte_p; | |
1229 | { | |
1230 | int nchars; | |
1231 | ||
1232 | if (multibyte_p) | |
1233 | { | |
1234 | int rest = strlen (s), len; | |
1235 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1236 | |
5f5c8ee5 GM |
1237 | for (nchars = 0; rest > 0; ++nchars) |
1238 | { | |
4fdb80f2 | 1239 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1240 | rest -= len, p += len; |
0a9dc68b RS |
1241 | } |
1242 | } | |
5f5c8ee5 GM |
1243 | else |
1244 | nchars = strlen (s); | |
1245 | ||
1246 | return nchars; | |
0b1005ef KH |
1247 | } |
1248 | ||
5f5c8ee5 GM |
1249 | |
1250 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1251 | NEWPOS->charpos. POS is a known position in string STRING. | |
1252 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1253 | |
5f5c8ee5 GM |
1254 | static void |
1255 | compute_string_pos (newpos, pos, string) | |
1256 | struct text_pos *newpos, pos; | |
1257 | Lisp_Object string; | |
76412d64 | 1258 | { |
5f5c8ee5 GM |
1259 | xassert (STRINGP (string)); |
1260 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1261 | ||
1262 | if (STRING_MULTIBYTE (string)) | |
6fc556fd KR |
1263 | *newpos = string_pos_nchars_ahead (pos, string, |
1264 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1265 | else |
1266 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1267 | } |
1268 | ||
9c74a0dd | 1269 | |
5f5c8ee5 GM |
1270 | \f |
1271 | /*********************************************************************** | |
1272 | Lisp form evaluation | |
1273 | ***********************************************************************/ | |
1274 | ||
116d6f5c | 1275 | /* Error handler for safe_eval and safe_call. */ |
5f5c8ee5 GM |
1276 | |
1277 | static Lisp_Object | |
116d6f5c | 1278 | safe_eval_handler (arg) |
5f5c8ee5 GM |
1279 | Lisp_Object arg; |
1280 | { | |
0dbf9fd2 | 1281 | add_to_log ("Error during redisplay: %s", arg, Qnil); |
5f5c8ee5 GM |
1282 | return Qnil; |
1283 | } | |
1284 | ||
1285 | ||
1286 | /* Evaluate SEXPR and return the result, or nil if something went | |
2913a9c0 | 1287 | wrong. Prevent redisplay during the evaluation. */ |
5f5c8ee5 | 1288 | |
71e5b1b8 | 1289 | Lisp_Object |
116d6f5c | 1290 | safe_eval (sexpr) |
5f5c8ee5 GM |
1291 | Lisp_Object sexpr; |
1292 | { | |
5f5c8ee5 | 1293 | Lisp_Object val; |
30a3f61c GM |
1294 | |
1295 | if (inhibit_eval_during_redisplay) | |
1296 | val = Qnil; | |
1297 | else | |
1298 | { | |
1299 | int count = BINDING_STACK_SIZE (); | |
1300 | struct gcpro gcpro1; | |
0d8b31c0 | 1301 | |
30a3f61c GM |
1302 | GCPRO1 (sexpr); |
1303 | specbind (Qinhibit_redisplay, Qt); | |
1304 | val = internal_condition_case_1 (Feval, sexpr, Qerror, | |
1305 | safe_eval_handler); | |
1306 | UNGCPRO; | |
1307 | val = unbind_to (count, val); | |
1308 | } | |
1309 | ||
1310 | return val; | |
0d8b31c0 GM |
1311 | } |
1312 | ||
1313 | ||
1314 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
2913a9c0 GM |
1315 | Return the result, or nil if something went wrong. Prevent |
1316 | redisplay during the evaluation. */ | |
0d8b31c0 GM |
1317 | |
1318 | Lisp_Object | |
116d6f5c | 1319 | safe_call (nargs, args) |
0d8b31c0 GM |
1320 | int nargs; |
1321 | Lisp_Object *args; | |
1322 | { | |
0d8b31c0 | 1323 | Lisp_Object val; |
30a3f61c GM |
1324 | |
1325 | if (inhibit_eval_during_redisplay) | |
1326 | val = Qnil; | |
1327 | else | |
1328 | { | |
1329 | int count = BINDING_STACK_SIZE (); | |
1330 | struct gcpro gcpro1; | |
0d8b31c0 | 1331 | |
30a3f61c GM |
1332 | GCPRO1 (args[0]); |
1333 | gcpro1.nvars = nargs; | |
1334 | specbind (Qinhibit_redisplay, Qt); | |
1335 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qerror, | |
1336 | safe_eval_handler); | |
1337 | UNGCPRO; | |
1338 | val = unbind_to (count, val); | |
1339 | } | |
1340 | ||
1341 | return val; | |
5f5c8ee5 GM |
1342 | } |
1343 | ||
1344 | ||
116d6f5c GM |
1345 | /* Call function FN with one argument ARG. |
1346 | Return the result, or nil if something went wrong. */ | |
1347 | ||
1348 | Lisp_Object | |
1349 | safe_call1 (fn, arg) | |
1350 | Lisp_Object fn, arg; | |
1351 | { | |
1352 | Lisp_Object args[2]; | |
1353 | args[0] = fn; | |
1354 | args[1] = arg; | |
1355 | return safe_call (2, args); | |
1356 | } | |
1357 | ||
1358 | ||
5f5c8ee5 GM |
1359 | \f |
1360 | /*********************************************************************** | |
1361 | Debugging | |
1362 | ***********************************************************************/ | |
1363 | ||
1364 | #if 0 | |
1365 | ||
1366 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1367 | This is for debugging. It is too slow to do unconditionally. */ | |
1368 | ||
1369 | static void | |
1370 | check_it (it) | |
1371 | struct it *it; | |
1372 | { | |
1373 | if (it->method == next_element_from_string) | |
a2889657 | 1374 | { |
5f5c8ee5 GM |
1375 | xassert (STRINGP (it->string)); |
1376 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1377 | } | |
1378 | else if (it->method == next_element_from_buffer) | |
1379 | { | |
1380 | /* Check that character and byte positions agree. */ | |
1381 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1382 | } | |
73af359d | 1383 | |
5f5c8ee5 GM |
1384 | if (it->dpvec) |
1385 | xassert (it->current.dpvec_index >= 0); | |
1386 | else | |
1387 | xassert (it->current.dpvec_index < 0); | |
1388 | } | |
1f40cad2 | 1389 | |
5f5c8ee5 GM |
1390 | #define CHECK_IT(IT) check_it ((IT)) |
1391 | ||
1392 | #else /* not 0 */ | |
1393 | ||
1394 | #define CHECK_IT(IT) (void) 0 | |
1395 | ||
1396 | #endif /* not 0 */ | |
1397 | ||
1398 | ||
1399 | #if GLYPH_DEBUG | |
1400 | ||
1401 | /* Check that the window end of window W is what we expect it | |
1402 | to be---the last row in the current matrix displaying text. */ | |
1403 | ||
1404 | static void | |
1405 | check_window_end (w) | |
1406 | struct window *w; | |
1407 | { | |
1408 | if (!MINI_WINDOW_P (w) | |
1409 | && !NILP (w->window_end_valid)) | |
1410 | { | |
1411 | struct glyph_row *row; | |
1412 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1413 | XFASTINT (w->window_end_vpos)), | |
1414 | !row->enabled_p | |
1415 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1416 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1421 | ||
1422 | #else /* not GLYPH_DEBUG */ | |
1423 | ||
1424 | #define CHECK_WINDOW_END(W) (void) 0 | |
1425 | ||
1426 | #endif /* not GLYPH_DEBUG */ | |
1427 | ||
1428 | ||
1429 | \f | |
1430 | /*********************************************************************** | |
1431 | Iterator initialization | |
1432 | ***********************************************************************/ | |
1433 | ||
1434 | /* Initialize IT for displaying current_buffer in window W, starting | |
1435 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1436 | position is specified which is useful when the iterator is assigned | |
1437 | a position later. BYTEPOS is the byte position corresponding to | |
3ebf0ea9 | 1438 | CHARPOS. BYTEPOS < 0 means compute it from CHARPOS. |
5f5c8ee5 GM |
1439 | |
1440 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1441 | will produce glyphs in that row. | |
1442 | ||
1443 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1444 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
045dee35 | 1445 | HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for |
e037b9ec | 1446 | displaying the tool-bar. |
5f5c8ee5 GM |
1447 | |
1448 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
045dee35 | 1449 | HEADER_LINE_FACE_ID, the iterator will be initialized to use the |
5f5c8ee5 GM |
1450 | corresponding mode line glyph row of the desired matrix of W. */ |
1451 | ||
1452 | void | |
1453 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1454 | struct it *it; | |
1455 | struct window *w; | |
1456 | int charpos, bytepos; | |
1457 | struct glyph_row *row; | |
1458 | enum face_id base_face_id; | |
1459 | { | |
1460 | int highlight_region_p; | |
5f5c8ee5 GM |
1461 | |
1462 | /* Some precondition checks. */ | |
1463 | xassert (w != NULL && it != NULL); | |
3b6b6db7 SM |
1464 | xassert (charpos < 0 || (charpos >= BUF_BEG (current_buffer) |
1465 | && charpos <= ZV)); | |
5f5c8ee5 GM |
1466 | |
1467 | /* If face attributes have been changed since the last redisplay, | |
1468 | free realized faces now because they depend on face definitions | |
1469 | that might have changed. */ | |
1470 | if (face_change_count) | |
1471 | { | |
1472 | face_change_count = 0; | |
1473 | free_all_realized_faces (Qnil); | |
1474 | } | |
1475 | ||
1476 | /* Use one of the mode line rows of W's desired matrix if | |
1477 | appropriate. */ | |
1478 | if (row == NULL) | |
1479 | { | |
1480 | if (base_face_id == MODE_LINE_FACE_ID) | |
1481 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
045dee35 GM |
1482 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1483 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1484 | } |
1485 | ||
1486 | /* Clear IT. */ | |
1487 | bzero (it, sizeof *it); | |
1488 | it->current.overlay_string_index = -1; | |
1489 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1490 | it->base_face_id = base_face_id; |
1491 | ||
1492 | /* The window in which we iterate over current_buffer: */ | |
1493 | XSETWINDOW (it->window, w); | |
1494 | it->w = w; | |
1495 | it->f = XFRAME (w->frame); | |
1496 | ||
d475bcb8 GM |
1497 | /* Extra space between lines (on window systems only). */ |
1498 | if (base_face_id == DEFAULT_FACE_ID | |
1499 | && FRAME_WINDOW_P (it->f)) | |
1500 | { | |
1501 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1502 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1503 | else if (it->f->extra_line_spacing > 0) | |
1504 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1505 | } | |
1506 | ||
5f5c8ee5 | 1507 | /* If realized faces have been removed, e.g. because of face |
62be9979 GM |
1508 | attribute changes of named faces, recompute them. When running |
1509 | in batch mode, the face cache of Vterminal_frame is null. If | |
1510 | we happen to get called, make a dummy face cache. */ | |
9010e6b1 AI |
1511 | if ( |
1512 | #ifndef WINDOWSNT | |
1513 | noninteractive && | |
1514 | #endif | |
1515 | FRAME_FACE_CACHE (it->f) == NULL) | |
62be9979 | 1516 | init_frame_faces (it->f); |
5f5c8ee5 GM |
1517 | if (FRAME_FACE_CACHE (it->f)->used == 0) |
1518 | recompute_basic_faces (it->f); | |
1519 | ||
5f5c8ee5 GM |
1520 | /* Current value of the `space-width', and 'height' properties. */ |
1521 | it->space_width = Qnil; | |
1522 | it->font_height = Qnil; | |
1523 | ||
1524 | /* Are control characters displayed as `^C'? */ | |
1525 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1526 | ||
1527 | /* -1 means everything between a CR and the following line end | |
1528 | is invisible. >0 means lines indented more than this value are | |
1529 | invisible. */ | |
1530 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1531 | ? XFASTINT (current_buffer->selective_display) | |
1532 | : (!NILP (current_buffer->selective_display) | |
1533 | ? -1 : 0)); | |
1534 | it->selective_display_ellipsis_p | |
1535 | = !NILP (current_buffer->selective_display_ellipses); | |
1536 | ||
1537 | /* Display table to use. */ | |
1538 | it->dp = window_display_table (w); | |
1539 | ||
1540 | /* Are multibyte characters enabled in current_buffer? */ | |
1541 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1542 | ||
1543 | /* Non-zero if we should highlight the region. */ | |
1544 | highlight_region_p | |
3ebf0ea9 | 1545 | = (!NILP (Vtransient_mark_mode) |
5f5c8ee5 GM |
1546 | && !NILP (current_buffer->mark_active) |
1547 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1548 | ||
1549 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1550 | start and end of a visible region in window IT->w. Set both to | |
1551 | -1 to indicate no region. */ | |
1552 | if (highlight_region_p | |
1553 | /* Maybe highlight only in selected window. */ | |
1554 | && (/* Either show region everywhere. */ | |
1555 | highlight_nonselected_windows | |
1556 | /* Or show region in the selected window. */ | |
1557 | || w == XWINDOW (selected_window) | |
1558 | /* Or show the region if we are in the mini-buffer and W is | |
1559 | the window the mini-buffer refers to. */ | |
1560 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
d8731202 | 1561 | && WINDOWP (Vminibuf_scroll_window) |
5f5c8ee5 GM |
1562 | && w == XWINDOW (Vminibuf_scroll_window)))) |
1563 | { | |
1564 | int charpos = marker_position (current_buffer->mark); | |
1565 | it->region_beg_charpos = min (PT, charpos); | |
1566 | it->region_end_charpos = max (PT, charpos); | |
1567 | } | |
1568 | else | |
1569 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1570 | ||
1571 | /* Get the position at which the redisplay_end_trigger hook should | |
1572 | be run, if it is to be run at all. */ | |
1573 | if (MARKERP (w->redisplay_end_trigger) | |
1574 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1575 | it->redisplay_end_trigger_charpos | |
1576 | = marker_position (w->redisplay_end_trigger); | |
1577 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1578 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1579 | ||
1580 | /* Correct bogus values of tab_width. */ | |
1581 | it->tab_width = XINT (current_buffer->tab_width); | |
1582 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1583 | it->tab_width = 8; | |
1584 | ||
1585 | /* Are lines in the display truncated? */ | |
1586 | it->truncate_lines_p | |
1587 | = (base_face_id != DEFAULT_FACE_ID | |
1588 | || XINT (it->w->hscroll) | |
1589 | || (truncate_partial_width_windows | |
1590 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1591 | || !NILP (current_buffer->truncate_lines)); | |
1592 | ||
1593 | /* Get dimensions of truncation and continuation glyphs. These are | |
b46952ae | 1594 | displayed as fringe bitmaps under X, so we don't need them for such |
5f5c8ee5 GM |
1595 | frames. */ |
1596 | if (!FRAME_WINDOW_P (it->f)) | |
1597 | { | |
1598 | if (it->truncate_lines_p) | |
1599 | { | |
1600 | /* We will need the truncation glyph. */ | |
1601 | xassert (it->glyph_row == NULL); | |
1602 | produce_special_glyphs (it, IT_TRUNCATION); | |
1603 | it->truncation_pixel_width = it->pixel_width; | |
1604 | } | |
1605 | else | |
1606 | { | |
1607 | /* We will need the continuation glyph. */ | |
1608 | xassert (it->glyph_row == NULL); | |
1609 | produce_special_glyphs (it, IT_CONTINUATION); | |
1610 | it->continuation_pixel_width = it->pixel_width; | |
1611 | } | |
1612 | ||
1613 | /* Reset these values to zero becaue the produce_special_glyphs | |
1614 | above has changed them. */ | |
1615 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1616 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1617 | } |
1618 | ||
1619 | /* Set this after getting the dimensions of truncation and | |
1620 | continuation glyphs, so that we don't produce glyphs when calling | |
1621 | produce_special_glyphs, above. */ | |
1622 | it->glyph_row = row; | |
1623 | it->area = TEXT_AREA; | |
1624 | ||
1625 | /* Get the dimensions of the display area. The display area | |
1626 | consists of the visible window area plus a horizontally scrolled | |
1627 | part to the left of the window. All x-values are relative to the | |
1628 | start of this total display area. */ | |
1629 | if (base_face_id != DEFAULT_FACE_ID) | |
1630 | { | |
1631 | /* Mode lines, menu bar in terminal frames. */ | |
1632 | it->first_visible_x = 0; | |
1633 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | it->first_visible_x | |
1638 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1639 | it->last_visible_x = (it->first_visible_x | |
1640 | + window_box_width (w, TEXT_AREA)); | |
1641 | ||
1642 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1643 | the right margin. Otherwise, leave room for the continuation | |
1644 | glyph(s). Truncation and continuation glyphs are not inserted | |
1645 | for window-based redisplay. */ | |
1646 | if (!FRAME_WINDOW_P (it->f)) | |
1647 | { | |
1648 | if (it->truncate_lines_p) | |
1649 | it->last_visible_x -= it->truncation_pixel_width; | |
1650 | else | |
1651 | it->last_visible_x -= it->continuation_pixel_width; | |
1652 | } | |
1653 | ||
045dee35 GM |
1654 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1655 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1656 | } |
1657 | ||
1658 | /* Leave room for a border glyph. */ | |
1659 | if (!FRAME_WINDOW_P (it->f) | |
1660 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1661 | it->last_visible_x -= 1; | |
1662 | ||
1663 | it->last_visible_y = window_text_bottom_y (w); | |
1664 | ||
1665 | /* For mode lines and alike, arrange for the first glyph having a | |
1666 | left box line if the face specifies a box. */ | |
1667 | if (base_face_id != DEFAULT_FACE_ID) | |
1668 | { | |
1669 | struct face *face; | |
1670 | ||
1671 | it->face_id = base_face_id; | |
1672 | ||
1673 | /* If we have a boxed mode line, make the first character appear | |
1674 | with a left box line. */ | |
1675 | face = FACE_FROM_ID (it->f, base_face_id); | |
1676 | if (face->box != FACE_NO_BOX) | |
1677 | it->start_of_box_run_p = 1; | |
1678 | } | |
1679 | ||
1680 | /* If a buffer position was specified, set the iterator there, | |
1681 | getting overlays and face properties from that position. */ | |
3ebf0ea9 | 1682 | if (charpos >= BUF_BEG (current_buffer)) |
5f5c8ee5 GM |
1683 | { |
1684 | it->end_charpos = ZV; | |
1685 | it->face_id = -1; | |
1686 | IT_CHARPOS (*it) = charpos; | |
1687 | ||
1688 | /* Compute byte position if not specified. */ | |
3ebf0ea9 | 1689 | if (bytepos < charpos) |
5f5c8ee5 GM |
1690 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); |
1691 | else | |
1692 | IT_BYTEPOS (*it) = bytepos; | |
1693 | ||
1694 | /* Compute faces etc. */ | |
1695 | reseat (it, it->current.pos, 1); | |
1696 | } | |
1697 | ||
1698 | CHECK_IT (it); | |
1699 | } | |
1700 | ||
1701 | ||
1702 | /* Initialize IT for the display of window W with window start POS. */ | |
1703 | ||
1704 | void | |
1705 | start_display (it, w, pos) | |
1706 | struct it *it; | |
1707 | struct window *w; | |
1708 | struct text_pos pos; | |
1709 | { | |
5f5c8ee5 | 1710 | struct glyph_row *row; |
045dee35 | 1711 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1712 | |
1713 | row = w->desired_matrix->rows + first_vpos; | |
1714 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
17fdcfc8 GM |
1715 | |
1716 | if (!it->truncate_lines_p) | |
5f5c8ee5 | 1717 | { |
17fdcfc8 GM |
1718 | int start_at_line_beg_p; |
1719 | int first_y = it->current_y; | |
1720 | ||
1721 | /* If window start is not at a line start, skip forward to POS to | |
1722 | get the correct continuation lines width. */ | |
1723 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1724 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1725 | if (!start_at_line_beg_p) | |
5f5c8ee5 | 1726 | { |
17fdcfc8 GM |
1727 | reseat_at_previous_visible_line_start (it); |
1728 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1729 | ||
1730 | /* If lines are continued, this line may end in the middle | |
1731 | of a multi-glyph character (e.g. a control character | |
1732 | displayed as \003, or in the middle of an overlay | |
1733 | string). In this case move_it_to above will not have | |
1734 | taken us to the start of the continuation line but to the | |
1735 | end of the continued line. */ | |
b28cb6ed | 1736 | if (it->current_x > 0) |
5f5c8ee5 | 1737 | { |
b28cb6ed GM |
1738 | if (it->current.dpvec_index >= 0 |
1739 | || it->current.overlay_string_index >= 0) | |
1740 | { | |
cafafe0b | 1741 | set_iterator_to_next (it, 1); |
b28cb6ed GM |
1742 | move_it_in_display_line_to (it, -1, -1, 0); |
1743 | } | |
17fdcfc8 | 1744 | |
b28cb6ed | 1745 | it->continuation_lines_width += it->current_x; |
5f5c8ee5 | 1746 | } |
b28cb6ed GM |
1747 | |
1748 | /* We're starting a new display line, not affected by the | |
1749 | height of the continued line, so clear the appropriate | |
1750 | fields in the iterator structure. */ | |
1751 | it->max_ascent = it->max_descent = 0; | |
1752 | it->max_phys_ascent = it->max_phys_descent = 0; | |
5f5c8ee5 | 1753 | |
17fdcfc8 GM |
1754 | it->current_y = first_y; |
1755 | it->vpos = 0; | |
1756 | it->current_x = it->hpos = 0; | |
1757 | } | |
5f5c8ee5 GM |
1758 | } |
1759 | ||
1760 | #if 0 /* Don't assert the following because start_display is sometimes | |
1761 | called intentionally with a window start that is not at a | |
1762 | line start. Please leave this code in as a comment. */ | |
1763 | ||
1764 | /* Window start should be on a line start, now. */ | |
1765 | xassert (it->continuation_lines_width | |
1766 | || IT_CHARPOS (it) == BEGV | |
1767 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1768 | #endif /* 0 */ | |
1769 | } | |
1770 | ||
1771 | ||
4bde0ebb GM |
1772 | /* Return 1 if POS is a position in ellipses displayed for invisible |
1773 | text. W is the window we display, for text property lookup. */ | |
5f5c8ee5 | 1774 | |
4bde0ebb GM |
1775 | static int |
1776 | in_ellipses_for_invisible_text_p (pos, w) | |
5f5c8ee5 | 1777 | struct display_pos *pos; |
4bde0ebb | 1778 | struct window *w; |
5f5c8ee5 | 1779 | { |
ac90c44f | 1780 | Lisp_Object prop, window; |
4bde0ebb GM |
1781 | int ellipses_p = 0; |
1782 | int charpos = CHARPOS (pos->pos); | |
ac90c44f GM |
1783 | |
1784 | /* If POS specifies a position in a display vector, this might | |
1785 | be for an ellipsis displayed for invisible text. We won't | |
1786 | get the iterator set up for delivering that ellipsis unless | |
1787 | we make sure that it gets aware of the invisible text. */ | |
1788 | if (pos->dpvec_index >= 0 | |
1789 | && pos->overlay_string_index < 0 | |
1790 | && CHARPOS (pos->string_pos) < 0 | |
1791 | && charpos > BEGV | |
1792 | && (XSETWINDOW (window, w), | |
1793 | prop = Fget_char_property (make_number (charpos), | |
1794 | Qinvisible, window), | |
20fbd925 | 1795 | !TEXT_PROP_MEANS_INVISIBLE (prop))) |
ac90c44f GM |
1796 | { |
1797 | prop = Fget_char_property (make_number (charpos - 1), Qinvisible, | |
1798 | window); | |
8580a4e3 | 1799 | ellipses_p = 2 == TEXT_PROP_MEANS_INVISIBLE (prop); |
4bde0ebb GM |
1800 | } |
1801 | ||
1802 | return ellipses_p; | |
1803 | } | |
1804 | ||
1805 | ||
1806 | /* Initialize IT for stepping through current_buffer in window W, | |
1807 | starting at position POS that includes overlay string and display | |
47d57b22 GM |
1808 | vector/ control character translation position information. Value |
1809 | is zero if there are overlay strings with newlines at POS. */ | |
4bde0ebb | 1810 | |
47d57b22 | 1811 | static int |
4bde0ebb GM |
1812 | init_from_display_pos (it, w, pos) |
1813 | struct it *it; | |
1814 | struct window *w; | |
1815 | struct display_pos *pos; | |
1816 | { | |
1817 | int charpos = CHARPOS (pos->pos), bytepos = BYTEPOS (pos->pos); | |
47d57b22 | 1818 | int i, overlay_strings_with_newlines = 0; |
4bde0ebb GM |
1819 | |
1820 | /* If POS specifies a position in a display vector, this might | |
1821 | be for an ellipsis displayed for invisible text. We won't | |
1822 | get the iterator set up for delivering that ellipsis unless | |
1823 | we make sure that it gets aware of the invisible text. */ | |
1824 | if (in_ellipses_for_invisible_text_p (pos, w)) | |
1825 | { | |
1826 | --charpos; | |
1827 | bytepos = 0; | |
ac90c44f GM |
1828 | } |
1829 | ||
5f5c8ee5 GM |
1830 | /* Keep in mind: the call to reseat in init_iterator skips invisible |
1831 | text, so we might end up at a position different from POS. This | |
1832 | is only a problem when POS is a row start after a newline and an | |
1833 | overlay starts there with an after-string, and the overlay has an | |
1834 | invisible property. Since we don't skip invisible text in | |
1835 | display_line and elsewhere immediately after consuming the | |
1836 | newline before the row start, such a POS will not be in a string, | |
1837 | but the call to init_iterator below will move us to the | |
1838 | after-string. */ | |
ac90c44f | 1839 | init_iterator (it, w, charpos, bytepos, NULL, DEFAULT_FACE_ID); |
5f5c8ee5 | 1840 | |
47d57b22 | 1841 | for (i = 0; i < it->n_overlay_strings; ++i) |
1e1e5daf GM |
1842 | { |
1843 | char *s = XSTRING (it->overlay_strings[i])->data; | |
1844 | char *e = s + STRING_BYTES (XSTRING (it->overlay_strings[i])); | |
1845 | ||
1846 | while (s < e && *s != '\n') | |
1847 | ++s; | |
1848 | ||
1849 | if (s < e) | |
1850 | { | |
1851 | overlay_strings_with_newlines = 1; | |
1852 | break; | |
1853 | } | |
1854 | } | |
47d57b22 | 1855 | |
75c5350a GM |
1856 | /* If position is within an overlay string, set up IT to the right |
1857 | overlay string. */ | |
5f5c8ee5 GM |
1858 | if (pos->overlay_string_index >= 0) |
1859 | { | |
1860 | int relative_index; | |
75c5350a GM |
1861 | |
1862 | /* If the first overlay string happens to have a `display' | |
1863 | property for an image, the iterator will be set up for that | |
1864 | image, and we have to undo that setup first before we can | |
1865 | correct the overlay string index. */ | |
1866 | if (it->method == next_element_from_image) | |
1867 | pop_it (it); | |
5f5c8ee5 GM |
1868 | |
1869 | /* We already have the first chunk of overlay strings in | |
1870 | IT->overlay_strings. Load more until the one for | |
1871 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1872 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1873 | { | |
1874 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1875 | it->current.overlay_string_index = 0; | |
1876 | while (n--) | |
1877 | { | |
5a08cbaf | 1878 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
1879 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; |
1880 | } | |
1881 | } | |
1882 | ||
1883 | it->current.overlay_string_index = pos->overlay_string_index; | |
1884 | relative_index = (it->current.overlay_string_index | |
1885 | % OVERLAY_STRING_CHUNK_SIZE); | |
1886 | it->string = it->overlay_strings[relative_index]; | |
cafafe0b | 1887 | xassert (STRINGP (it->string)); |
5f5c8ee5 GM |
1888 | it->current.string_pos = pos->string_pos; |
1889 | it->method = next_element_from_string; | |
1890 | } | |
1e1e5daf GM |
1891 | |
1892 | #if 0 /* This is bogus because POS not having an overlay string | |
1893 | position does not mean it's after the string. Example: A | |
1894 | line starting with a before-string and initialization of IT | |
1895 | to the previous row's end position. */ | |
2be8f184 GM |
1896 | else if (it->current.overlay_string_index >= 0) |
1897 | { | |
1898 | /* If POS says we're already after an overlay string ending at | |
1899 | POS, make sure to pop the iterator because it will be in | |
1900 | front of that overlay string. When POS is ZV, we've thereby | |
1901 | also ``processed'' overlay strings at ZV. */ | |
aeb2b8fc GM |
1902 | while (it->sp) |
1903 | pop_it (it); | |
2be8f184 GM |
1904 | it->current.overlay_string_index = -1; |
1905 | it->method = next_element_from_buffer; | |
1906 | if (CHARPOS (pos->pos) == ZV) | |
1907 | it->overlay_strings_at_end_processed_p = 1; | |
1908 | } | |
1e1e5daf | 1909 | #endif /* 0 */ |
2be8f184 GM |
1910 | |
1911 | if (CHARPOS (pos->string_pos) >= 0) | |
5f5c8ee5 GM |
1912 | { |
1913 | /* Recorded position is not in an overlay string, but in another | |
1914 | string. This can only be a string from a `display' property. | |
1915 | IT should already be filled with that string. */ | |
1916 | it->current.string_pos = pos->string_pos; | |
1917 | xassert (STRINGP (it->string)); | |
1918 | } | |
1919 | ||
ac90c44f GM |
1920 | /* Restore position in display vector translations, control |
1921 | character translations or ellipses. */ | |
5f5c8ee5 GM |
1922 | if (pos->dpvec_index >= 0) |
1923 | { | |
ac90c44f GM |
1924 | if (it->dpvec == NULL) |
1925 | get_next_display_element (it); | |
5f5c8ee5 GM |
1926 | xassert (it->dpvec && it->current.dpvec_index == 0); |
1927 | it->current.dpvec_index = pos->dpvec_index; | |
1928 | } | |
1929 | ||
1930 | CHECK_IT (it); | |
47d57b22 | 1931 | return !overlay_strings_with_newlines; |
5f5c8ee5 GM |
1932 | } |
1933 | ||
1934 | ||
1935 | /* Initialize IT for stepping through current_buffer in window W | |
1936 | starting at ROW->start. */ | |
1937 | ||
1938 | static void | |
1939 | init_to_row_start (it, w, row) | |
1940 | struct it *it; | |
1941 | struct window *w; | |
1942 | struct glyph_row *row; | |
1943 | { | |
1944 | init_from_display_pos (it, w, &row->start); | |
1945 | it->continuation_lines_width = row->continuation_lines_width; | |
1946 | CHECK_IT (it); | |
1947 | } | |
1948 | ||
1949 | ||
1950 | /* Initialize IT for stepping through current_buffer in window W | |
47d57b22 GM |
1951 | starting in the line following ROW, i.e. starting at ROW->end. |
1952 | Value is zero if there are overlay strings with newlines at ROW's | |
1953 | end position. */ | |
5f5c8ee5 | 1954 | |
47d57b22 | 1955 | static int |
5f5c8ee5 GM |
1956 | init_to_row_end (it, w, row) |
1957 | struct it *it; | |
1958 | struct window *w; | |
1959 | struct glyph_row *row; | |
1960 | { | |
47d57b22 GM |
1961 | int success = 0; |
1962 | ||
1963 | if (init_from_display_pos (it, w, &row->end)) | |
1964 | { | |
1965 | if (row->continued_p) | |
1966 | it->continuation_lines_width | |
1967 | = row->continuation_lines_width + row->pixel_width; | |
1968 | CHECK_IT (it); | |
1969 | success = 1; | |
1970 | } | |
1971 | ||
1972 | return success; | |
5f5c8ee5 GM |
1973 | } |
1974 | ||
1975 | ||
1976 | ||
1977 | \f | |
1978 | /*********************************************************************** | |
1979 | Text properties | |
1980 | ***********************************************************************/ | |
1981 | ||
1982 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1983 | overlay changes. Set IT->stop_charpos to the next position where | |
1984 | to stop. */ | |
1985 | ||
1986 | static void | |
1987 | handle_stop (it) | |
1988 | struct it *it; | |
1989 | { | |
1990 | enum prop_handled handled; | |
1991 | int handle_overlay_change_p = 1; | |
1992 | struct props *p; | |
1993 | ||
1994 | it->dpvec = NULL; | |
1995 | it->current.dpvec_index = -1; | |
1996 | ||
1997 | do | |
1998 | { | |
1999 | handled = HANDLED_NORMALLY; | |
2000 | ||
2001 | /* Call text property handlers. */ | |
2002 | for (p = it_props; p->handler; ++p) | |
2003 | { | |
2004 | handled = p->handler (it); | |
2970b9be | 2005 | |
5f5c8ee5 GM |
2006 | if (handled == HANDLED_RECOMPUTE_PROPS) |
2007 | break; | |
2008 | else if (handled == HANDLED_RETURN) | |
2009 | return; | |
2010 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
2011 | handle_overlay_change_p = 0; | |
2012 | } | |
2013 | ||
2014 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
2015 | { | |
2016 | /* Don't check for overlay strings below when set to deliver | |
2017 | characters from a display vector. */ | |
2018 | if (it->method == next_element_from_display_vector) | |
2019 | handle_overlay_change_p = 0; | |
2020 | ||
2021 | /* Handle overlay changes. */ | |
2022 | if (handle_overlay_change_p) | |
2023 | handled = handle_overlay_change (it); | |
2024 | ||
2025 | /* Determine where to stop next. */ | |
2026 | if (handled == HANDLED_NORMALLY) | |
2027 | compute_stop_pos (it); | |
2028 | } | |
2029 | } | |
2030 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
2031 | } | |
2032 | ||
2033 | ||
2034 | /* Compute IT->stop_charpos from text property and overlay change | |
2035 | information for IT's current position. */ | |
2036 | ||
2037 | static void | |
2038 | compute_stop_pos (it) | |
2039 | struct it *it; | |
2040 | { | |
2041 | register INTERVAL iv, next_iv; | |
2042 | Lisp_Object object, limit, position; | |
2043 | ||
2044 | /* If nowhere else, stop at the end. */ | |
2045 | it->stop_charpos = it->end_charpos; | |
2046 | ||
2047 | if (STRINGP (it->string)) | |
2048 | { | |
2049 | /* Strings are usually short, so don't limit the search for | |
2050 | properties. */ | |
2051 | object = it->string; | |
2052 | limit = Qnil; | |
ac90c44f | 2053 | position = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2054 | } |
2055 | else | |
2056 | { | |
2057 | int charpos; | |
2058 | ||
2059 | /* If next overlay change is in front of the current stop pos | |
2060 | (which is IT->end_charpos), stop there. Note: value of | |
2061 | next_overlay_change is point-max if no overlay change | |
2062 | follows. */ | |
2063 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
2064 | if (charpos < it->stop_charpos) | |
2065 | it->stop_charpos = charpos; | |
2066 | ||
2067 | /* If showing the region, we have to stop at the region | |
2068 | start or end because the face might change there. */ | |
2069 | if (it->region_beg_charpos > 0) | |
2070 | { | |
2071 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
2072 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
2073 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
2074 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
2075 | } | |
2076 | ||
2077 | /* Set up variables for computing the stop position from text | |
2078 | property changes. */ | |
2079 | XSETBUFFER (object, current_buffer); | |
ac90c44f GM |
2080 | limit = make_number (IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); |
2081 | position = make_number (IT_CHARPOS (*it)); | |
5f5c8ee5 GM |
2082 | |
2083 | } | |
2084 | ||
2085 | /* Get the interval containing IT's position. Value is a null | |
2086 | interval if there isn't such an interval. */ | |
2087 | iv = validate_interval_range (object, &position, &position, 0); | |
2088 | if (!NULL_INTERVAL_P (iv)) | |
2089 | { | |
2090 | Lisp_Object values_here[LAST_PROP_IDX]; | |
2091 | struct props *p; | |
2092 | ||
2093 | /* Get properties here. */ | |
2094 | for (p = it_props; p->handler; ++p) | |
2095 | values_here[p->idx] = textget (iv->plist, *p->name); | |
2096 | ||
2097 | /* Look for an interval following iv that has different | |
2098 | properties. */ | |
2099 | for (next_iv = next_interval (iv); | |
2100 | (!NULL_INTERVAL_P (next_iv) | |
2101 | && (NILP (limit) | |
2102 | || XFASTINT (limit) > next_iv->position)); | |
2103 | next_iv = next_interval (next_iv)) | |
2104 | { | |
2105 | for (p = it_props; p->handler; ++p) | |
2106 | { | |
2107 | Lisp_Object new_value; | |
2108 | ||
2109 | new_value = textget (next_iv->plist, *p->name); | |
2110 | if (!EQ (values_here[p->idx], new_value)) | |
2111 | break; | |
2112 | } | |
2113 | ||
2114 | if (p->handler) | |
2115 | break; | |
2116 | } | |
2117 | ||
2118 | if (!NULL_INTERVAL_P (next_iv)) | |
2119 | { | |
2120 | if (INTEGERP (limit) | |
2121 | && next_iv->position >= XFASTINT (limit)) | |
2122 | /* No text property change up to limit. */ | |
2123 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
2124 | else | |
2125 | /* Text properties change in next_iv. */ | |
2126 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
2127 | } | |
2128 | } | |
2129 | ||
2130 | xassert (STRINGP (it->string) | |
2131 | || (it->stop_charpos >= BEGV | |
2132 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
2133 | } | |
2134 | ||
2135 | ||
2136 | /* Return the position of the next overlay change after POS in | |
2137 | current_buffer. Value is point-max if no overlay change | |
2138 | follows. This is like `next-overlay-change' but doesn't use | |
2139 | xmalloc. */ | |
2140 | ||
2141 | static int | |
2142 | next_overlay_change (pos) | |
2143 | int pos; | |
2144 | { | |
2145 | int noverlays; | |
2146 | int endpos; | |
2147 | Lisp_Object *overlays; | |
2148 | int len; | |
2149 | int i; | |
2150 | ||
2151 | /* Get all overlays at the given position. */ | |
2152 | len = 10; | |
2153 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2154 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2155 | if (noverlays > len) |
2156 | { | |
2157 | len = noverlays; | |
2158 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 2159 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
2160 | } |
2161 | ||
2162 | /* If any of these overlays ends before endpos, | |
2163 | use its ending point instead. */ | |
2164 | for (i = 0; i < noverlays; ++i) | |
2165 | { | |
2166 | Lisp_Object oend; | |
2167 | int oendpos; | |
2168 | ||
2169 | oend = OVERLAY_END (overlays[i]); | |
2170 | oendpos = OVERLAY_POSITION (oend); | |
2171 | endpos = min (endpos, oendpos); | |
2172 | } | |
2173 | ||
2174 | return endpos; | |
2175 | } | |
2176 | ||
2177 | ||
2178 | \f | |
2179 | /*********************************************************************** | |
2180 | Fontification | |
2181 | ***********************************************************************/ | |
2182 | ||
2183 | /* Handle changes in the `fontified' property of the current buffer by | |
2184 | calling hook functions from Qfontification_functions to fontify | |
2185 | regions of text. */ | |
2186 | ||
2187 | static enum prop_handled | |
2188 | handle_fontified_prop (it) | |
2189 | struct it *it; | |
2190 | { | |
2191 | Lisp_Object prop, pos; | |
2192 | enum prop_handled handled = HANDLED_NORMALLY; | |
2193 | ||
2194 | /* Get the value of the `fontified' property at IT's current buffer | |
2195 | position. (The `fontified' property doesn't have a special | |
2196 | meaning in strings.) If the value is nil, call functions from | |
2197 | Qfontification_functions. */ | |
2198 | if (!STRINGP (it->string) | |
2199 | && it->s == NULL | |
2200 | && !NILP (Vfontification_functions) | |
085536c2 | 2201 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
2202 | && (pos = make_number (IT_CHARPOS (*it)), |
2203 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
2204 | NILP (prop))) | |
2205 | { | |
2d27dae2 | 2206 | int count = BINDING_STACK_SIZE (); |
085536c2 GM |
2207 | Lisp_Object val; |
2208 | ||
2209 | val = Vfontification_functions; | |
2210 | specbind (Qfontification_functions, Qnil); | |
085536c2 GM |
2211 | |
2212 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
116d6f5c | 2213 | safe_call1 (val, pos); |
085536c2 GM |
2214 | else |
2215 | { | |
2216 | Lisp_Object globals, fn; | |
2217 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 2218 | |
085536c2 GM |
2219 | globals = Qnil; |
2220 | GCPRO2 (val, globals); | |
2221 | ||
2222 | for (; CONSP (val); val = XCDR (val)) | |
2223 | { | |
2224 | fn = XCAR (val); | |
2225 | ||
2226 | if (EQ (fn, Qt)) | |
2227 | { | |
2228 | /* A value of t indicates this hook has a local | |
2229 | binding; it means to run the global binding too. | |
2230 | In a global value, t should not occur. If it | |
2231 | does, we must ignore it to avoid an endless | |
2232 | loop. */ | |
2233 | for (globals = Fdefault_value (Qfontification_functions); | |
2234 | CONSP (globals); | |
2235 | globals = XCDR (globals)) | |
2236 | { | |
2237 | fn = XCAR (globals); | |
2238 | if (!EQ (fn, Qt)) | |
116d6f5c | 2239 | safe_call1 (fn, pos); |
085536c2 GM |
2240 | } |
2241 | } | |
2242 | else | |
116d6f5c | 2243 | safe_call1 (fn, pos); |
085536c2 GM |
2244 | } |
2245 | ||
2246 | UNGCPRO; | |
2247 | } | |
2248 | ||
2249 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2250 | |
2251 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
2252 | something. This avoids an endless loop if they failed to | |
2253 | fontify the text for which reason ever. */ | |
2254 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
2255 | handled = HANDLED_RECOMPUTE_PROPS; | |
2256 | } | |
2257 | ||
2258 | return handled; | |
2259 | } | |
2260 | ||
2261 | ||
2262 | \f | |
2263 | /*********************************************************************** | |
2264 | Faces | |
2265 | ***********************************************************************/ | |
2266 | ||
2267 | /* Set up iterator IT from face properties at its current position. | |
2268 | Called from handle_stop. */ | |
2269 | ||
2270 | static enum prop_handled | |
2271 | handle_face_prop (it) | |
2272 | struct it *it; | |
2273 | { | |
2274 | int new_face_id, next_stop; | |
2275 | ||
2276 | if (!STRINGP (it->string)) | |
2277 | { | |
2278 | new_face_id | |
2279 | = face_at_buffer_position (it->w, | |
2280 | IT_CHARPOS (*it), | |
2281 | it->region_beg_charpos, | |
2282 | it->region_end_charpos, | |
2283 | &next_stop, | |
2284 | (IT_CHARPOS (*it) | |
2285 | + TEXT_PROP_DISTANCE_LIMIT), | |
2286 | 0); | |
2287 | ||
2288 | /* Is this a start of a run of characters with box face? | |
2289 | Caveat: this can be called for a freshly initialized | |
2290 | iterator; face_id is -1 is this case. We know that the new | |
2291 | face will not change until limit, i.e. if the new face has a | |
2292 | box, all characters up to limit will have one. But, as | |
2293 | usual, we don't know whether limit is really the end. */ | |
2294 | if (new_face_id != it->face_id) | |
2295 | { | |
2296 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2297 | ||
2298 | /* If new face has a box but old face has not, this is | |
2299 | the start of a run of characters with box, i.e. it has | |
2300 | a shadow on the left side. The value of face_id of the | |
2301 | iterator will be -1 if this is the initial call that gets | |
2302 | the face. In this case, we have to look in front of IT's | |
2303 | position and see whether there is a face != new_face_id. */ | |
2304 | it->start_of_box_run_p | |
2305 | = (new_face->box != FACE_NO_BOX | |
2306 | && (it->face_id >= 0 | |
2307 | || IT_CHARPOS (*it) == BEG | |
2308 | || new_face_id != face_before_it_pos (it))); | |
2309 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2310 | } | |
2311 | } | |
2312 | else | |
2313 | { | |
06a12811 GM |
2314 | int base_face_id, bufpos; |
2315 | ||
2316 | if (it->current.overlay_string_index >= 0) | |
2317 | bufpos = IT_CHARPOS (*it); | |
2318 | else | |
2319 | bufpos = 0; | |
2320 | ||
2321 | /* For strings from a buffer, i.e. overlay strings or strings | |
2322 | from a `display' property, use the face at IT's current | |
2323 | buffer position as the base face to merge with, so that | |
2324 | overlay strings appear in the same face as surrounding | |
2325 | text, unless they specify their own faces. */ | |
2326 | base_face_id = underlying_face_id (it); | |
2327 | ||
2328 | new_face_id = face_at_string_position (it->w, | |
2329 | it->string, | |
2330 | IT_STRING_CHARPOS (*it), | |
2331 | bufpos, | |
2332 | it->region_beg_charpos, | |
2333 | it->region_end_charpos, | |
2334 | &next_stop, | |
5de7c6f2 | 2335 | base_face_id, 0); |
5f5c8ee5 GM |
2336 | |
2337 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
2338 | /* If IT is used to display a mode line we would really like to | |
2339 | use the mode line face instead of the frame's default face. */ | |
2340 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2341 | && new_face_id == DEFAULT_FACE_ID) | |
2342 | new_face_id = MODE_LINE_FACE_ID; | |
2343 | #endif | |
2344 | ||
2345 | /* Is this a start of a run of characters with box? Caveat: | |
2346 | this can be called for a freshly allocated iterator; face_id | |
2347 | is -1 is this case. We know that the new face will not | |
2348 | change until the next check pos, i.e. if the new face has a | |
2349 | box, all characters up to that position will have a | |
2350 | box. But, as usual, we don't know whether that position | |
2351 | is really the end. */ | |
2352 | if (new_face_id != it->face_id) | |
2353 | { | |
2354 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2355 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2356 | ||
2357 | /* If new face has a box but old face hasn't, this is the | |
2358 | start of a run of characters with box, i.e. it has a | |
2359 | shadow on the left side. */ | |
2360 | it->start_of_box_run_p | |
2361 | = new_face->box && (old_face == NULL || !old_face->box); | |
2362 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | it->face_id = new_face_id; | |
5f5c8ee5 GM |
2367 | return HANDLED_NORMALLY; |
2368 | } | |
2369 | ||
2370 | ||
06a12811 GM |
2371 | /* Return the ID of the face ``underlying'' IT's current position, |
2372 | which is in a string. If the iterator is associated with a | |
2373 | buffer, return the face at IT's current buffer position. | |
2374 | Otherwise, use the iterator's base_face_id. */ | |
2375 | ||
2376 | static int | |
2377 | underlying_face_id (it) | |
2378 | struct it *it; | |
2379 | { | |
2380 | int face_id = it->base_face_id, i; | |
2381 | ||
2382 | xassert (STRINGP (it->string)); | |
2383 | ||
2384 | for (i = it->sp - 1; i >= 0; --i) | |
2385 | if (NILP (it->stack[i].string)) | |
2386 | face_id = it->stack[i].face_id; | |
2387 | ||
2388 | return face_id; | |
2389 | } | |
2390 | ||
2391 | ||
5f5c8ee5 GM |
2392 | /* Compute the face one character before or after the current position |
2393 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2394 | position. Value is the id of the face. */ | |
2395 | ||
2396 | static int | |
2397 | face_before_or_after_it_pos (it, before_p) | |
2398 | struct it *it; | |
2399 | int before_p; | |
2400 | { | |
2401 | int face_id, limit; | |
2402 | int next_check_charpos; | |
2403 | struct text_pos pos; | |
2404 | ||
2405 | xassert (it->s == NULL); | |
2406 | ||
2407 | if (STRINGP (it->string)) | |
2408 | { | |
06a12811 GM |
2409 | int bufpos, base_face_id; |
2410 | ||
5f5c8ee5 GM |
2411 | /* No face change past the end of the string (for the case |
2412 | we are padding with spaces). No face change before the | |
2413 | string start. */ | |
2414 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
2415 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
2416 | return it->face_id; | |
2417 | ||
2418 | /* Set pos to the position before or after IT's current position. */ | |
2419 | if (before_p) | |
2420 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2421 | else | |
260a86a0 KH |
2422 | /* For composition, we must check the character after the |
2423 | composition. */ | |
2424 | pos = (it->what == IT_COMPOSITION | |
2425 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2426 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 | 2427 | |
06a12811 GM |
2428 | if (it->current.overlay_string_index >= 0) |
2429 | bufpos = IT_CHARPOS (*it); | |
2430 | else | |
2431 | bufpos = 0; | |
2432 | ||
2433 | base_face_id = underlying_face_id (it); | |
2434 | ||
5f5c8ee5 | 2435 | /* Get the face for ASCII, or unibyte. */ |
06a12811 GM |
2436 | face_id = face_at_string_position (it->w, |
2437 | it->string, | |
2438 | CHARPOS (pos), | |
2439 | bufpos, | |
2440 | it->region_beg_charpos, | |
2441 | it->region_end_charpos, | |
2442 | &next_check_charpos, | |
5de7c6f2 | 2443 | base_face_id, 0); |
5f5c8ee5 GM |
2444 | |
2445 | /* Correct the face for charsets different from ASCII. Do it | |
2446 | for the multibyte case only. The face returned above is | |
2447 | suitable for unibyte text if IT->string is unibyte. */ | |
2448 | if (STRING_MULTIBYTE (it->string)) | |
2449 | { | |
2450 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
2451 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
980806b6 KH |
2452 | int c, len; |
2453 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
5f5c8ee5 | 2454 | |
4fdb80f2 | 2455 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2456 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2457 | } |
2458 | } | |
2459 | else | |
2460 | { | |
70851746 GM |
2461 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2462 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2463 | return it->face_id; | |
2464 | ||
5f5c8ee5 GM |
2465 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2466 | pos = it->current.pos; | |
2467 | ||
2468 | if (before_p) | |
c1005d06 | 2469 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2470 | else |
260a86a0 KH |
2471 | { |
2472 | if (it->what == IT_COMPOSITION) | |
2473 | /* For composition, we must check the position after the | |
2474 | composition. */ | |
2475 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2476 | else | |
c1005d06 | 2477 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2478 | } |
06a12811 | 2479 | |
5f5c8ee5 GM |
2480 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2481 | face_id = face_at_buffer_position (it->w, | |
2482 | CHARPOS (pos), | |
2483 | it->region_beg_charpos, | |
2484 | it->region_end_charpos, | |
2485 | &next_check_charpos, | |
2486 | limit, 0); | |
2487 | ||
2488 | /* Correct the face for charsets different from ASCII. Do it | |
2489 | for the multibyte case only. The face returned above is | |
2490 | suitable for unibyte text if current_buffer is unibyte. */ | |
2491 | if (it->multibyte_p) | |
2492 | { | |
980806b6 KH |
2493 | int c = FETCH_MULTIBYTE_CHAR (CHARPOS (pos)); |
2494 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2495 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2496 | } |
2497 | } | |
2498 | ||
2499 | return face_id; | |
2500 | } | |
2501 | ||
2502 | ||
2503 | \f | |
2504 | /*********************************************************************** | |
2505 | Invisible text | |
2506 | ***********************************************************************/ | |
2507 | ||
2508 | /* Set up iterator IT from invisible properties at its current | |
2509 | position. Called from handle_stop. */ | |
2510 | ||
2511 | static enum prop_handled | |
2512 | handle_invisible_prop (it) | |
2513 | struct it *it; | |
2514 | { | |
2515 | enum prop_handled handled = HANDLED_NORMALLY; | |
2516 | ||
2517 | if (STRINGP (it->string)) | |
2518 | { | |
2519 | extern Lisp_Object Qinvisible; | |
2520 | Lisp_Object prop, end_charpos, limit, charpos; | |
2521 | ||
2522 | /* Get the value of the invisible text property at the | |
2523 | current position. Value will be nil if there is no such | |
2524 | property. */ | |
ac90c44f | 2525 | charpos = make_number (IT_STRING_CHARPOS (*it)); |
5f5c8ee5 GM |
2526 | prop = Fget_text_property (charpos, Qinvisible, it->string); |
2527 | ||
eadc0bf8 GM |
2528 | if (!NILP (prop) |
2529 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2530 | { |
2531 | handled = HANDLED_RECOMPUTE_PROPS; | |
2532 | ||
2533 | /* Get the position at which the next change of the | |
2534 | invisible text property can be found in IT->string. | |
2535 | Value will be nil if the property value is the same for | |
2536 | all the rest of IT->string. */ | |
2537 | XSETINT (limit, XSTRING (it->string)->size); | |
2538 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2539 | it->string, limit); | |
2540 | ||
2541 | /* Text at current position is invisible. The next | |
2542 | change in the property is at position end_charpos. | |
2543 | Move IT's current position to that position. */ | |
2544 | if (INTEGERP (end_charpos) | |
2545 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2546 | { | |
2547 | struct text_pos old; | |
2548 | old = it->current.string_pos; | |
2549 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2550 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2551 | } | |
2552 | else | |
2553 | { | |
2554 | /* The rest of the string is invisible. If this is an | |
2555 | overlay string, proceed with the next overlay string | |
2556 | or whatever comes and return a character from there. */ | |
2557 | if (it->current.overlay_string_index >= 0) | |
2558 | { | |
2559 | next_overlay_string (it); | |
2560 | /* Don't check for overlay strings when we just | |
2561 | finished processing them. */ | |
2562 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2563 | } | |
2564 | else | |
2565 | { | |
2566 | struct Lisp_String *s = XSTRING (it->string); | |
2567 | IT_STRING_CHARPOS (*it) = s->size; | |
2568 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2569 | } | |
2570 | } | |
2571 | } | |
2572 | } | |
2573 | else | |
2574 | { | |
8580a4e3 | 2575 | int invis_p, newpos, next_stop, start_charpos; |
5a08cbaf | 2576 | Lisp_Object pos, prop, overlay; |
5f5c8ee5 GM |
2577 | |
2578 | /* First of all, is there invisible text at this position? */ | |
5a08cbaf | 2579 | start_charpos = IT_CHARPOS (*it); |
ac90c44f | 2580 | pos = make_number (IT_CHARPOS (*it)); |
5a08cbaf GM |
2581 | prop = get_char_property_and_overlay (pos, Qinvisible, it->window, |
2582 | &overlay); | |
8580a4e3 SM |
2583 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
2584 | ||
5f5c8ee5 | 2585 | /* If we are on invisible text, skip over it. */ |
8580a4e3 | 2586 | if (invis_p && IT_CHARPOS (*it) < it->end_charpos) |
5f5c8ee5 GM |
2587 | { |
2588 | /* Record whether we have to display an ellipsis for the | |
2589 | invisible text. */ | |
8580a4e3 | 2590 | int display_ellipsis_p = invis_p == 2; |
5f5c8ee5 GM |
2591 | |
2592 | handled = HANDLED_RECOMPUTE_PROPS; | |
2593 | ||
2594 | /* Loop skipping over invisible text. The loop is left at | |
2595 | ZV or with IT on the first char being visible again. */ | |
2596 | do | |
2597 | { | |
2598 | /* Try to skip some invisible text. Return value is the | |
2599 | position reached which can be equal to IT's position | |
2600 | if there is nothing invisible here. This skips both | |
2601 | over invisible text properties and overlays with | |
2602 | invisible property. */ | |
2603 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2604 | &next_stop, ZV, it->window); | |
2605 | ||
2606 | /* If we skipped nothing at all we weren't at invisible | |
2607 | text in the first place. If everything to the end of | |
2608 | the buffer was skipped, end the loop. */ | |
2609 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
8580a4e3 | 2610 | invis_p = 0; |
5f5c8ee5 GM |
2611 | else |
2612 | { | |
2613 | /* We skipped some characters but not necessarily | |
2614 | all there are. Check if we ended up on visible | |
2615 | text. Fget_char_property returns the property of | |
2616 | the char before the given position, i.e. if we | |
8580a4e3 | 2617 | get invis_p = 0, this means that the char at |
5f5c8ee5 | 2618 | newpos is visible. */ |
ac90c44f | 2619 | pos = make_number (newpos); |
5f5c8ee5 | 2620 | prop = Fget_char_property (pos, Qinvisible, it->window); |
8580a4e3 | 2621 | invis_p = TEXT_PROP_MEANS_INVISIBLE (prop); |
5f5c8ee5 GM |
2622 | } |
2623 | ||
2624 | /* If we ended up on invisible text, proceed to | |
2625 | skip starting with next_stop. */ | |
8580a4e3 | 2626 | if (invis_p) |
5f5c8ee5 GM |
2627 | IT_CHARPOS (*it) = next_stop; |
2628 | } | |
8580a4e3 | 2629 | while (invis_p); |
5a08cbaf | 2630 | |
5f5c8ee5 GM |
2631 | /* The position newpos is now either ZV or on visible text. */ |
2632 | IT_CHARPOS (*it) = newpos; | |
2633 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2634 | ||
5a08cbaf GM |
2635 | /* If there are before-strings at the start of invisible |
2636 | text, and the text is invisible because of a text | |
2637 | property, arrange to show before-strings because 20.x did | |
2638 | it that way. (If the text is invisible because of an | |
2639 | overlay property instead of a text property, this is | |
2640 | already handled in the overlay code.) */ | |
2641 | if (NILP (overlay) | |
2642 | && get_overlay_strings (it, start_charpos)) | |
5f5c8ee5 | 2643 | { |
5a08cbaf GM |
2644 | handled = HANDLED_RECOMPUTE_PROPS; |
2645 | it->stack[it->sp - 1].display_ellipsis_p = display_ellipsis_p; | |
5f5c8ee5 | 2646 | } |
5a08cbaf GM |
2647 | else if (display_ellipsis_p) |
2648 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
2649 | } |
2650 | } | |
2651 | ||
2652 | return handled; | |
2653 | } | |
2654 | ||
2655 | ||
5a08cbaf GM |
2656 | /* Make iterator IT return `...' next. */ |
2657 | ||
2658 | static void | |
2659 | setup_for_ellipsis (it) | |
2660 | struct it *it; | |
2661 | { | |
2662 | if (it->dp | |
2663 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2664 | { | |
2665 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2666 | it->dpvec = v->contents; | |
2667 | it->dpend = v->contents + v->size; | |
2668 | } | |
2669 | else | |
2670 | { | |
2671 | /* Default `...'. */ | |
2672 | it->dpvec = default_invis_vector; | |
2673 | it->dpend = default_invis_vector + 3; | |
2674 | } | |
2675 | ||
2676 | /* The ellipsis display does not replace the display of the | |
2677 | character at the new position. Indicate this by setting | |
2678 | IT->dpvec_char_len to zero. */ | |
2679 | it->dpvec_char_len = 0; | |
2680 | ||
2681 | it->current.dpvec_index = 0; | |
2682 | it->method = next_element_from_display_vector; | |
2683 | } | |
2684 | ||
2685 | ||
5f5c8ee5 GM |
2686 | \f |
2687 | /*********************************************************************** | |
2688 | 'display' property | |
2689 | ***********************************************************************/ | |
2690 | ||
2691 | /* Set up iterator IT from `display' property at its current position. | |
2692 | Called from handle_stop. */ | |
2693 | ||
2694 | static enum prop_handled | |
2695 | handle_display_prop (it) | |
2696 | struct it *it; | |
2697 | { | |
2698 | Lisp_Object prop, object; | |
2699 | struct text_pos *position; | |
a61b7058 | 2700 | int display_replaced_p = 0; |
5f5c8ee5 GM |
2701 | |
2702 | if (STRINGP (it->string)) | |
2703 | { | |
2704 | object = it->string; | |
2705 | position = &it->current.string_pos; | |
2706 | } | |
2707 | else | |
2708 | { | |
221dd3e7 | 2709 | object = it->w->buffer; |
5f5c8ee5 GM |
2710 | position = &it->current.pos; |
2711 | } | |
2712 | ||
2713 | /* Reset those iterator values set from display property values. */ | |
2714 | it->font_height = Qnil; | |
2715 | it->space_width = Qnil; | |
2716 | it->voffset = 0; | |
2717 | ||
2718 | /* We don't support recursive `display' properties, i.e. string | |
2719 | values that have a string `display' property, that have a string | |
2720 | `display' property etc. */ | |
2721 | if (!it->string_from_display_prop_p) | |
2722 | it->area = TEXT_AREA; | |
2723 | ||
2724 | prop = Fget_char_property (make_number (position->charpos), | |
2725 | Qdisplay, object); | |
2726 | if (NILP (prop)) | |
2727 | return HANDLED_NORMALLY; | |
2728 | ||
f3751a65 | 2729 | if (CONSP (prop) |
12700f40 GM |
2730 | /* Simple properties. */ |
2731 | && !EQ (XCAR (prop), Qimage) | |
2732 | && !EQ (XCAR (prop), Qspace) | |
2733 | && !EQ (XCAR (prop), Qwhen) | |
2734 | && !EQ (XCAR (prop), Qspace_width) | |
2735 | && !EQ (XCAR (prop), Qheight) | |
2736 | && !EQ (XCAR (prop), Qraise) | |
2737 | /* Marginal area specifications. */ | |
2738 | && !(CONSP (XCAR (prop)) && EQ (XCAR (XCAR (prop)), Qmargin)) | |
2739 | && !NILP (XCAR (prop))) | |
5f5c8ee5 | 2740 | { |
a61b7058 | 2741 | for (; CONSP (prop); prop = XCDR (prop)) |
5f5c8ee5 | 2742 | { |
a61b7058 GM |
2743 | if (handle_single_display_prop (it, XCAR (prop), object, |
2744 | position, display_replaced_p)) | |
2745 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2746 | } |
2747 | } | |
2748 | else if (VECTORP (prop)) | |
2749 | { | |
2750 | int i; | |
a61b7058 GM |
2751 | for (i = 0; i < ASIZE (prop); ++i) |
2752 | if (handle_single_display_prop (it, AREF (prop, i), object, | |
2753 | position, display_replaced_p)) | |
2754 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2755 | } |
2756 | else | |
2757 | { | |
a61b7058 GM |
2758 | if (handle_single_display_prop (it, prop, object, position, 0)) |
2759 | display_replaced_p = 1; | |
5f5c8ee5 GM |
2760 | } |
2761 | ||
a61b7058 | 2762 | return display_replaced_p ? HANDLED_RETURN : HANDLED_NORMALLY; |
5f5c8ee5 GM |
2763 | } |
2764 | ||
2765 | ||
6c577098 | 2766 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2767 | at START_POS in OBJECT. */ |
2768 | ||
2769 | static struct text_pos | |
2770 | display_prop_end (it, object, start_pos) | |
2771 | struct it *it; | |
2772 | Lisp_Object object; | |
2773 | struct text_pos start_pos; | |
2774 | { | |
2775 | Lisp_Object end; | |
2776 | struct text_pos end_pos; | |
5f5c8ee5 | 2777 | |
016b5642 MB |
2778 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
2779 | Qdisplay, object, Qnil); | |
6c577098 GM |
2780 | CHARPOS (end_pos) = XFASTINT (end); |
2781 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2782 | compute_string_pos (&end_pos, start_pos, it->string); |
2783 | else | |
6c577098 | 2784 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2785 | |
2786 | return end_pos; | |
2787 | } | |
2788 | ||
2789 | ||
2790 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2791 | is the object in which the `display' property was found. *POSITION | |
a61b7058 GM |
2792 | is the position at which it was found. DISPLAY_REPLACED_P non-zero |
2793 | means that we previously saw a display sub-property which already | |
2794 | replaced text display with something else, for example an image; | |
2795 | ignore such properties after the first one has been processed. | |
5f5c8ee5 GM |
2796 | |
2797 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2798 | end position of the `display' property. | |
2799 | ||
a61b7058 GM |
2800 | Value is non-zero something was found which replaces the display |
2801 | of buffer or string text. */ | |
5f5c8ee5 GM |
2802 | |
2803 | static int | |
a61b7058 GM |
2804 | handle_single_display_prop (it, prop, object, position, |
2805 | display_replaced_before_p) | |
5f5c8ee5 GM |
2806 | struct it *it; |
2807 | Lisp_Object prop; | |
2808 | Lisp_Object object; | |
2809 | struct text_pos *position; | |
a61b7058 | 2810 | int display_replaced_before_p; |
5f5c8ee5 GM |
2811 | { |
2812 | Lisp_Object value; | |
a61b7058 | 2813 | int replaces_text_display_p = 0; |
5f5c8ee5 GM |
2814 | Lisp_Object form; |
2815 | ||
d3acf96b | 2816 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
5a4c88c4 | 2817 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2818 | form = Qt; |
d3acf96b | 2819 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2820 | { |
2821 | prop = XCDR (prop); | |
2822 | if (!CONSP (prop)) | |
2823 | return 0; | |
2824 | form = XCAR (prop); | |
2825 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2826 | } |
2827 | ||
2828 | if (!NILP (form) && !EQ (form, Qt)) | |
2829 | { | |
b384d6f8 | 2830 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 | 2831 | struct gcpro gcpro1; |
5f5c8ee5 | 2832 | |
b384d6f8 GM |
2833 | /* Bind `object' to the object having the `display' property, a |
2834 | buffer or string. Bind `position' to the position in the | |
2835 | object where the property was found, and `buffer-position' | |
2836 | to the current position in the buffer. */ | |
2837 | specbind (Qobject, object); | |
31ac723b SM |
2838 | specbind (Qposition, make_number (CHARPOS (*position))); |
2839 | specbind (Qbuffer_position, | |
2840 | make_number (STRINGP (object) | |
2841 | ? IT_CHARPOS (*it) : CHARPOS (*position))); | |
b384d6f8 | 2842 | GCPRO1 (form); |
116d6f5c | 2843 | form = safe_eval (form); |
b384d6f8 GM |
2844 | UNGCPRO; |
2845 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
2846 | } |
2847 | ||
2848 | if (NILP (form)) | |
2849 | return 0; | |
2850 | ||
2851 | if (CONSP (prop) | |
2852 | && EQ (XCAR (prop), Qheight) | |
2853 | && CONSP (XCDR (prop))) | |
2854 | { | |
e4093f38 | 2855 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
5f5c8ee5 GM |
2856 | return 0; |
2857 | ||
2858 | /* `(height HEIGHT)'. */ | |
2859 | it->font_height = XCAR (XCDR (prop)); | |
2860 | if (!NILP (it->font_height)) | |
2861 | { | |
2862 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2863 | int new_height = -1; | |
2864 | ||
2865 | if (CONSP (it->font_height) | |
2866 | && (EQ (XCAR (it->font_height), Qplus) | |
2867 | || EQ (XCAR (it->font_height), Qminus)) | |
2868 | && CONSP (XCDR (it->font_height)) | |
2869 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2870 | { | |
2871 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2872 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2873 | if (EQ (XCAR (it->font_height), Qplus)) | |
2874 | steps = - steps; | |
2875 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2876 | } | |
0d8b31c0 | 2877 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
2878 | { |
2879 | /* Call function with current height as argument. | |
2880 | Value is the new height. */ | |
116d6f5c GM |
2881 | Lisp_Object height; |
2882 | height = safe_call1 (it->font_height, | |
2883 | face->lface[LFACE_HEIGHT_INDEX]); | |
5f5c8ee5 GM |
2884 | if (NUMBERP (height)) |
2885 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
2886 | } |
2887 | else if (NUMBERP (it->font_height)) | |
2888 | { | |
2889 | /* Value is a multiple of the canonical char height. */ | |
2890 | struct face *face; | |
2891 | ||
2892 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2893 | new_height = (XFLOATINT (it->font_height) | |
2894 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2895 | } | |
2896 | else | |
2897 | { | |
2898 | /* Evaluate IT->font_height with `height' bound to the | |
2899 | current specified height to get the new height. */ | |
2900 | Lisp_Object value; | |
2d27dae2 | 2901 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 GM |
2902 | |
2903 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
116d6f5c | 2904 | value = safe_eval (it->font_height); |
5f5c8ee5 GM |
2905 | unbind_to (count, Qnil); |
2906 | ||
2907 | if (NUMBERP (value)) | |
2908 | new_height = XFLOATINT (value); | |
2909 | } | |
2910 | ||
2911 | if (new_height > 0) | |
2912 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2913 | } | |
2914 | } | |
2915 | else if (CONSP (prop) | |
2916 | && EQ (XCAR (prop), Qspace_width) | |
2917 | && CONSP (XCDR (prop))) | |
2918 | { | |
2919 | /* `(space_width WIDTH)'. */ | |
e4093f38 | 2920 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 2921 | return 0; |
5f5c8ee5 GM |
2922 | |
2923 | value = XCAR (XCDR (prop)); | |
2924 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2925 | it->space_width = value; | |
2926 | } | |
2927 | else if (CONSP (prop) | |
2928 | && EQ (XCAR (prop), Qraise) | |
2929 | && CONSP (XCDR (prop))) | |
2930 | { | |
5f5c8ee5 | 2931 | /* `(raise FACTOR)'. */ |
e4093f38 | 2932 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) |
bafb434c | 2933 | return 0; |
5f5c8ee5 | 2934 | |
fb3842a8 | 2935 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
2936 | value = XCAR (XCDR (prop)); |
2937 | if (NUMBERP (value)) | |
2938 | { | |
2939 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2940 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 2941 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
2942 | } |
2943 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2944 | } | |
2945 | else if (!it->string_from_display_prop_p) | |
2946 | { | |
f3751a65 GM |
2947 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
2948 | VALUE) or `((margin nil) VALUE)' or VALUE. */ | |
5f5c8ee5 GM |
2949 | Lisp_Object location, value; |
2950 | struct text_pos start_pos; | |
2951 | int valid_p; | |
2952 | ||
2953 | /* Characters having this form of property are not displayed, so | |
2954 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
2955 | start_pos = *position; |
2956 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 2957 | value = Qnil; |
5f5c8ee5 GM |
2958 | |
2959 | /* Let's stop at the new position and assume that all | |
2960 | text properties change there. */ | |
2961 | it->stop_charpos = position->charpos; | |
2962 | ||
f3751a65 GM |
2963 | location = Qunbound; |
2964 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 2965 | { |
f3751a65 GM |
2966 | Lisp_Object tem; |
2967 | ||
5f5c8ee5 | 2968 | value = XCDR (prop); |
f3751a65 GM |
2969 | if (CONSP (value)) |
2970 | value = XCAR (value); | |
2971 | ||
2972 | tem = XCAR (prop); | |
2973 | if (EQ (XCAR (tem), Qmargin) | |
2974 | && (tem = XCDR (tem), | |
2975 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
2976 | (NILP (tem) | |
2977 | || EQ (tem, Qleft_margin) | |
2978 | || EQ (tem, Qright_margin)))) | |
2979 | location = tem; | |
5f5c8ee5 | 2980 | } |
f3751a65 GM |
2981 | |
2982 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
2983 | { |
2984 | location = Qnil; | |
2985 | value = prop; | |
2986 | } | |
2987 | ||
2988 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 2989 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
2990 | valid_p = STRINGP (value); |
2991 | else | |
2992 | valid_p = (STRINGP (value) | |
2993 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2994 | || valid_image_p (value)); | |
2995 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2996 | valid_p = STRINGP (value); | |
2997 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2998 | ||
2999 | if ((EQ (location, Qleft_margin) | |
3000 | || EQ (location, Qright_margin) | |
3001 | || NILP (location)) | |
a61b7058 GM |
3002 | && valid_p |
3003 | && !display_replaced_before_p) | |
5f5c8ee5 | 3004 | { |
a61b7058 | 3005 | replaces_text_display_p = 1; |
a21a3943 | 3006 | |
5f5c8ee5 GM |
3007 | /* Save current settings of IT so that we can restore them |
3008 | when we are finished with the glyph property value. */ | |
3009 | push_it (it); | |
3010 | ||
3011 | if (NILP (location)) | |
3012 | it->area = TEXT_AREA; | |
3013 | else if (EQ (location, Qleft_margin)) | |
3014 | it->area = LEFT_MARGIN_AREA; | |
3015 | else | |
3016 | it->area = RIGHT_MARGIN_AREA; | |
3017 | ||
3018 | if (STRINGP (value)) | |
3019 | { | |
3020 | it->string = value; | |
3021 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3022 | it->current.overlay_string_index = -1; | |
3023 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
3024 | it->end_charpos = it->string_nchars | |
3025 | = XSTRING (it->string)->size; | |
3026 | it->method = next_element_from_string; | |
3027 | it->stop_charpos = 0; | |
3028 | it->string_from_display_prop_p = 1; | |
e187cf71 GM |
3029 | /* Say that we haven't consumed the characters with |
3030 | `display' property yet. The call to pop_it in | |
3031 | set_iterator_to_next will clean this up. */ | |
3032 | *position = start_pos; | |
5f5c8ee5 GM |
3033 | } |
3034 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
3035 | { | |
3036 | it->method = next_element_from_stretch; | |
3037 | it->object = value; | |
3038 | it->current.pos = it->position = start_pos; | |
3039 | } | |
3040 | #ifdef HAVE_WINDOW_SYSTEM | |
3041 | else | |
3042 | { | |
3043 | it->what = IT_IMAGE; | |
3044 | it->image_id = lookup_image (it->f, value); | |
3045 | it->position = start_pos; | |
3046 | it->object = NILP (object) ? it->w->buffer : object; | |
3047 | it->method = next_element_from_image; | |
3048 | ||
02513cdd | 3049 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
3050 | `display' property yet. The call to pop_it in |
3051 | set_iterator_to_next will clean this up. */ | |
3052 | *position = start_pos; | |
3053 | } | |
3054 | #endif /* HAVE_WINDOW_SYSTEM */ | |
3055 | } | |
a21a3943 GM |
3056 | else |
3057 | /* Invalid property or property not supported. Restore | |
3058 | the position to what it was before. */ | |
3059 | *position = start_pos; | |
5f5c8ee5 GM |
3060 | } |
3061 | ||
a61b7058 | 3062 | return replaces_text_display_p; |
5f5c8ee5 GM |
3063 | } |
3064 | ||
3065 | ||
06568bbf GM |
3066 | /* Check if PROP is a display sub-property value whose text should be |
3067 | treated as intangible. */ | |
3068 | ||
3069 | static int | |
3070 | single_display_prop_intangible_p (prop) | |
3071 | Lisp_Object prop; | |
3072 | { | |
3073 | /* Skip over `when FORM'. */ | |
3074 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3075 | { | |
3076 | prop = XCDR (prop); | |
3077 | if (!CONSP (prop)) | |
3078 | return 0; | |
3079 | prop = XCDR (prop); | |
3080 | } | |
3081 | ||
3082 | if (!CONSP (prop)) | |
3083 | return 0; | |
3084 | ||
3085 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
3086 | we don't need to treat text as intangible. */ | |
3087 | if (EQ (XCAR (prop), Qmargin)) | |
3088 | { | |
3089 | prop = XCDR (prop); | |
3090 | if (!CONSP (prop)) | |
3091 | return 0; | |
3092 | ||
3093 | prop = XCDR (prop); | |
3094 | if (!CONSP (prop) | |
3095 | || EQ (XCAR (prop), Qleft_margin) | |
3096 | || EQ (XCAR (prop), Qright_margin)) | |
3097 | return 0; | |
3098 | } | |
3099 | ||
3100 | return CONSP (prop) && EQ (XCAR (prop), Qimage); | |
3101 | } | |
3102 | ||
3103 | ||
3104 | /* Check if PROP is a display property value whose text should be | |
3105 | treated as intangible. */ | |
3106 | ||
3107 | int | |
3108 | display_prop_intangible_p (prop) | |
3109 | Lisp_Object prop; | |
3110 | { | |
3111 | if (CONSP (prop) | |
3112 | && CONSP (XCAR (prop)) | |
3113 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3114 | { | |
3115 | /* A list of sub-properties. */ | |
3116 | while (CONSP (prop)) | |
3117 | { | |
3118 | if (single_display_prop_intangible_p (XCAR (prop))) | |
3119 | return 1; | |
3120 | prop = XCDR (prop); | |
3121 | } | |
3122 | } | |
3123 | else if (VECTORP (prop)) | |
3124 | { | |
3125 | /* A vector of sub-properties. */ | |
3126 | int i; | |
a61b7058 GM |
3127 | for (i = 0; i < ASIZE (prop); ++i) |
3128 | if (single_display_prop_intangible_p (AREF (prop, i))) | |
06568bbf GM |
3129 | return 1; |
3130 | } | |
3131 | else | |
3132 | return single_display_prop_intangible_p (prop); | |
3133 | ||
3134 | return 0; | |
3135 | } | |
3136 | ||
74bd6d65 GM |
3137 | |
3138 | /* Return 1 if PROP is a display sub-property value containing STRING. */ | |
3139 | ||
3140 | static int | |
3141 | single_display_prop_string_p (prop, string) | |
3142 | Lisp_Object prop, string; | |
3143 | { | |
74bd6d65 GM |
3144 | if (EQ (string, prop)) |
3145 | return 1; | |
3146 | ||
3147 | /* Skip over `when FORM'. */ | |
3148 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
3149 | { | |
3150 | prop = XCDR (prop); | |
3151 | if (!CONSP (prop)) | |
3152 | return 0; | |
3153 | prop = XCDR (prop); | |
3154 | } | |
3155 | ||
3156 | if (CONSP (prop)) | |
3157 | /* Skip over `margin LOCATION'. */ | |
3158 | if (EQ (XCAR (prop), Qmargin)) | |
3159 | { | |
3160 | prop = XCDR (prop); | |
3161 | if (!CONSP (prop)) | |
3162 | return 0; | |
3163 | ||
3164 | prop = XCDR (prop); | |
3165 | if (!CONSP (prop)) | |
3166 | return 0; | |
3167 | } | |
3168 | ||
3169 | return CONSP (prop) && EQ (XCAR (prop), string); | |
3170 | } | |
3171 | ||
3172 | ||
3173 | /* Return 1 if STRING appears in the `display' property PROP. */ | |
3174 | ||
3175 | static int | |
3176 | display_prop_string_p (prop, string) | |
3177 | Lisp_Object prop, string; | |
3178 | { | |
74bd6d65 GM |
3179 | if (CONSP (prop) |
3180 | && CONSP (XCAR (prop)) | |
3181 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
3182 | { | |
3183 | /* A list of sub-properties. */ | |
3184 | while (CONSP (prop)) | |
3185 | { | |
3186 | if (single_display_prop_string_p (XCAR (prop), string)) | |
3187 | return 1; | |
3188 | prop = XCDR (prop); | |
3189 | } | |
3190 | } | |
3191 | else if (VECTORP (prop)) | |
3192 | { | |
3193 | /* A vector of sub-properties. */ | |
3194 | int i; | |
3195 | for (i = 0; i < ASIZE (prop); ++i) | |
3196 | if (single_display_prop_string_p (AREF (prop, i), string)) | |
3197 | return 1; | |
3198 | } | |
3199 | else | |
3200 | return single_display_prop_string_p (prop, string); | |
3201 | ||
3202 | return 0; | |
3203 | } | |
3204 | ||
3205 | ||
3206 | /* Determine from which buffer position in W's buffer STRING comes | |
3207 | from. AROUND_CHARPOS is an approximate position where it could | |
3208 | be from. Value is the buffer position or 0 if it couldn't be | |
3209 | determined. | |
3210 | ||
3211 | W's buffer must be current. | |
3212 | ||
3213 | This function is necessary because we don't record buffer positions | |
3214 | in glyphs generated from strings (to keep struct glyph small). | |
3215 | This function may only use code that doesn't eval because it is | |
3216 | called asynchronously from note_mouse_highlight. */ | |
3217 | ||
3218 | int | |
3219 | string_buffer_position (w, string, around_charpos) | |
3220 | struct window *w; | |
3221 | Lisp_Object string; | |
3222 | int around_charpos; | |
3223 | { | |
74bd6d65 GM |
3224 | Lisp_Object limit, prop, pos; |
3225 | const int MAX_DISTANCE = 1000; | |
3226 | int found = 0; | |
3227 | ||
d8731202 | 3228 | pos = make_number (around_charpos); |
74bd6d65 GM |
3229 | limit = make_number (min (XINT (pos) + MAX_DISTANCE, ZV)); |
3230 | while (!found && !EQ (pos, limit)) | |
3231 | { | |
3232 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3233 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3234 | found = 1; | |
3235 | else | |
134d9283 | 3236 | pos = Fnext_single_char_property_change (pos, Qdisplay, Qnil, limit); |
74bd6d65 GM |
3237 | } |
3238 | ||
3239 | if (!found) | |
3240 | { | |
d8731202 | 3241 | pos = make_number (around_charpos); |
74bd6d65 GM |
3242 | limit = make_number (max (XINT (pos) - MAX_DISTANCE, BEGV)); |
3243 | while (!found && !EQ (pos, limit)) | |
3244 | { | |
3245 | prop = Fget_char_property (pos, Qdisplay, Qnil); | |
3246 | if (!NILP (prop) && display_prop_string_p (prop, string)) | |
3247 | found = 1; | |
3248 | else | |
134d9283 GM |
3249 | pos = Fprevious_single_char_property_change (pos, Qdisplay, Qnil, |
3250 | limit); | |
74bd6d65 GM |
3251 | } |
3252 | } | |
3253 | ||
3254 | return found ? XINT (pos) : 0; | |
3255 | } | |
3256 | ||
3257 | ||
5f5c8ee5 | 3258 | \f |
260a86a0 KH |
3259 | /*********************************************************************** |
3260 | `composition' property | |
3261 | ***********************************************************************/ | |
3262 | ||
3263 | /* Set up iterator IT from `composition' property at its current | |
3264 | position. Called from handle_stop. */ | |
3265 | ||
3266 | static enum prop_handled | |
3267 | handle_composition_prop (it) | |
3268 | struct it *it; | |
3269 | { | |
3270 | Lisp_Object prop, string; | |
3271 | int pos, pos_byte, end; | |
3272 | enum prop_handled handled = HANDLED_NORMALLY; | |
3273 | ||
3274 | if (STRINGP (it->string)) | |
3275 | { | |
3276 | pos = IT_STRING_CHARPOS (*it); | |
3277 | pos_byte = IT_STRING_BYTEPOS (*it); | |
3278 | string = it->string; | |
3279 | } | |
3280 | else | |
3281 | { | |
3282 | pos = IT_CHARPOS (*it); | |
3283 | pos_byte = IT_BYTEPOS (*it); | |
3284 | string = Qnil; | |
3285 | } | |
3286 | ||
3287 | /* If there's a valid composition and point is not inside of the | |
3288 | composition (in the case that the composition is from the current | |
3289 | buffer), draw a glyph composed from the composition components. */ | |
3290 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
3291 | && COMPOSITION_VALID_P (pos, end, prop) | |
3292 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
3293 | { | |
3294 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
3295 | ||
3296 | if (id >= 0) | |
3297 | { | |
3298 | it->method = next_element_from_composition; | |
3299 | it->cmp_id = id; | |
3300 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
3301 | /* For a terminal, draw only the first character of the | |
3302 | components. */ | |
3303 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
3304 | it->len = (STRINGP (it->string) | |
3305 | ? string_char_to_byte (it->string, end) | |
3306 | : CHAR_TO_BYTE (end)) - pos_byte; | |
3307 | it->stop_charpos = end; | |
3308 | handled = HANDLED_RETURN; | |
3309 | } | |
3310 | } | |
3311 | ||
3312 | return handled; | |
3313 | } | |
3314 | ||
3315 | ||
3316 | \f | |
5f5c8ee5 GM |
3317 | /*********************************************************************** |
3318 | Overlay strings | |
3319 | ***********************************************************************/ | |
3320 | ||
3321 | /* The following structure is used to record overlay strings for | |
3322 | later sorting in load_overlay_strings. */ | |
3323 | ||
3324 | struct overlay_entry | |
3325 | { | |
2970b9be | 3326 | Lisp_Object overlay; |
5f5c8ee5 GM |
3327 | Lisp_Object string; |
3328 | int priority; | |
3329 | int after_string_p; | |
3330 | }; | |
3331 | ||
3332 | ||
3333 | /* Set up iterator IT from overlay strings at its current position. | |
3334 | Called from handle_stop. */ | |
3335 | ||
3336 | static enum prop_handled | |
3337 | handle_overlay_change (it) | |
3338 | struct it *it; | |
3339 | { | |
5a08cbaf | 3340 | if (!STRINGP (it->string) && get_overlay_strings (it, 0)) |
2970b9be | 3341 | return HANDLED_RECOMPUTE_PROPS; |
5f5c8ee5 | 3342 | else |
2970b9be | 3343 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
3344 | } |
3345 | ||
3346 | ||
3347 | /* Set up the next overlay string for delivery by IT, if there is an | |
3348 | overlay string to deliver. Called by set_iterator_to_next when the | |
3349 | end of the current overlay string is reached. If there are more | |
3350 | overlay strings to display, IT->string and | |
3351 | IT->current.overlay_string_index are set appropriately here. | |
3352 | Otherwise IT->string is set to nil. */ | |
3353 | ||
3354 | static void | |
3355 | next_overlay_string (it) | |
3356 | struct it *it; | |
3357 | { | |
3358 | ++it->current.overlay_string_index; | |
3359 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
3360 | { | |
3361 | /* No more overlay strings. Restore IT's settings to what | |
3362 | they were before overlay strings were processed, and | |
3363 | continue to deliver from current_buffer. */ | |
5a08cbaf GM |
3364 | int display_ellipsis_p = it->stack[it->sp - 1].display_ellipsis_p; |
3365 | ||
5f5c8ee5 GM |
3366 | pop_it (it); |
3367 | xassert (it->stop_charpos >= BEGV | |
3368 | && it->stop_charpos <= it->end_charpos); | |
3369 | it->string = Qnil; | |
3370 | it->current.overlay_string_index = -1; | |
3371 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
3372 | it->n_overlay_strings = 0; | |
3373 | it->method = next_element_from_buffer; | |
2970b9be GM |
3374 | |
3375 | /* If we're at the end of the buffer, record that we have | |
3376 | processed the overlay strings there already, so that | |
3377 | next_element_from_buffer doesn't try it again. */ | |
3378 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3379 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf GM |
3380 | |
3381 | /* If we have to display `...' for invisible text, set | |
3382 | the iterator up for that. */ | |
3383 | if (display_ellipsis_p) | |
3384 | setup_for_ellipsis (it); | |
5f5c8ee5 GM |
3385 | } |
3386 | else | |
3387 | { | |
3388 | /* There are more overlay strings to process. If | |
3389 | IT->current.overlay_string_index has advanced to a position | |
3390 | where we must load IT->overlay_strings with more strings, do | |
3391 | it. */ | |
3392 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
3393 | ||
3394 | if (it->current.overlay_string_index && i == 0) | |
5a08cbaf | 3395 | load_overlay_strings (it, 0); |
5f5c8ee5 GM |
3396 | |
3397 | /* Initialize IT to deliver display elements from the overlay | |
3398 | string. */ | |
3399 | it->string = it->overlay_strings[i]; | |
3400 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3401 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
3402 | it->method = next_element_from_string; | |
3403 | it->stop_charpos = 0; | |
3404 | } | |
3405 | ||
3406 | CHECK_IT (it); | |
3407 | } | |
3408 | ||
3409 | ||
3410 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
3411 | comparison function for qsort in load_overlay_strings. Overlay | |
3412 | strings for the same position are sorted so that | |
3413 | ||
2970b9be GM |
3414 | 1. All after-strings come in front of before-strings, except |
3415 | when they come from the same overlay. | |
5f5c8ee5 GM |
3416 | |
3417 | 2. Within after-strings, strings are sorted so that overlay strings | |
3418 | from overlays with higher priorities come first. | |
3419 | ||
3420 | 2. Within before-strings, strings are sorted so that overlay | |
3421 | strings from overlays with higher priorities come last. | |
3422 | ||
3423 | Value is analogous to strcmp. */ | |
3424 | ||
3425 | ||
3426 | static int | |
3427 | compare_overlay_entries (e1, e2) | |
3428 | void *e1, *e2; | |
3429 | { | |
3430 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
3431 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
3432 | int result; | |
3433 | ||
3434 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
3435 | { |
3436 | /* Let after-strings appear in front of before-strings if | |
3437 | they come from different overlays. */ | |
3438 | if (EQ (entry1->overlay, entry2->overlay)) | |
3439 | result = entry1->after_string_p ? 1 : -1; | |
3440 | else | |
3441 | result = entry1->after_string_p ? -1 : 1; | |
3442 | } | |
5f5c8ee5 GM |
3443 | else if (entry1->after_string_p) |
3444 | /* After-strings sorted in order of decreasing priority. */ | |
3445 | result = entry2->priority - entry1->priority; | |
3446 | else | |
3447 | /* Before-strings sorted in order of increasing priority. */ | |
3448 | result = entry1->priority - entry2->priority; | |
3449 | ||
3450 | return result; | |
3451 | } | |
3452 | ||
3453 | ||
3454 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
5a08cbaf GM |
3455 | current buffer position, or from CHARPOS if that is > 0. Set |
3456 | IT->n_overlays to the total number of overlay strings found. | |
5f5c8ee5 GM |
3457 | |
3458 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
3459 | a time. On entry into load_overlay_strings, | |
3460 | IT->current.overlay_string_index gives the number of overlay | |
3461 | strings that have already been loaded by previous calls to this | |
3462 | function. | |
3463 | ||
2970b9be GM |
3464 | IT->add_overlay_start contains an additional overlay start |
3465 | position to consider for taking overlay strings from, if non-zero. | |
3466 | This position comes into play when the overlay has an `invisible' | |
3467 | property, and both before and after-strings. When we've skipped to | |
3468 | the end of the overlay, because of its `invisible' property, we | |
3469 | nevertheless want its before-string to appear. | |
3470 | IT->add_overlay_start will contain the overlay start position | |
3471 | in this case. | |
3472 | ||
5f5c8ee5 GM |
3473 | Overlay strings are sorted so that after-string strings come in |
3474 | front of before-string strings. Within before and after-strings, | |
3475 | strings are sorted by overlay priority. See also function | |
3476 | compare_overlay_entries. */ | |
3477 | ||
3478 | static void | |
5a08cbaf | 3479 | load_overlay_strings (it, charpos) |
5f5c8ee5 | 3480 | struct it *it; |
5a08cbaf | 3481 | int charpos; |
5f5c8ee5 GM |
3482 | { |
3483 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
cafafe0b | 3484 | Lisp_Object ov, overlay, window, str, invisible; |
5f5c8ee5 GM |
3485 | int start, end; |
3486 | int size = 20; | |
cafafe0b | 3487 | int n = 0, i, j, invis_p; |
5f5c8ee5 GM |
3488 | struct overlay_entry *entries |
3489 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
5a08cbaf GM |
3490 | |
3491 | if (charpos <= 0) | |
3492 | charpos = IT_CHARPOS (*it); | |
5f5c8ee5 GM |
3493 | |
3494 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
3495 | `entries' which has size `size' and currently contains `n' | |
3496 | elements. AFTER_P non-zero means STRING is an after-string of | |
3497 | OVERLAY. */ | |
3498 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
3499 | do \ | |
3500 | { \ | |
3501 | Lisp_Object priority; \ | |
3502 | \ | |
3503 | if (n == size) \ | |
3504 | { \ | |
3505 | int new_size = 2 * size; \ | |
3506 | struct overlay_entry *old = entries; \ | |
3507 | entries = \ | |
3508 | (struct overlay_entry *) alloca (new_size \ | |
3509 | * sizeof *entries); \ | |
3510 | bcopy (old, entries, size * sizeof *entries); \ | |
3511 | size = new_size; \ | |
3512 | } \ | |
3513 | \ | |
3514 | entries[n].string = (STRING); \ | |
2970b9be | 3515 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 3516 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 3517 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
3518 | entries[n].after_string_p = (AFTER_P); \ |
3519 | ++n; \ | |
3520 | } \ | |
3521 | while (0) | |
3522 | ||
3523 | /* Process overlay before the overlay center. */ | |
2970b9be | 3524 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3525 | { |
9472f927 | 3526 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3527 | xassert (OVERLAYP (overlay)); |
3528 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3529 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3530 | ||
cafafe0b | 3531 | if (end < charpos) |
5f5c8ee5 GM |
3532 | break; |
3533 | ||
3534 | /* Skip this overlay if it doesn't start or end at IT's current | |
3535 | position. */ | |
cafafe0b | 3536 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3537 | continue; |
3538 | ||
3539 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3540 | window = Foverlay_get (overlay, Qwindow); | |
3541 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3542 | continue; | |
3543 | ||
cafafe0b GM |
3544 | /* If the text ``under'' the overlay is invisible, both before- |
3545 | and after-strings from this overlay are visible; start and | |
3546 | end position are indistinguishable. */ | |
3547 | invisible = Foverlay_get (overlay, Qinvisible); | |
3548 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3549 | ||
5f5c8ee5 | 3550 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3551 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 GM |
3552 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
3553 | && XSTRING (str)->size) | |
3554 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
3555 | ||
3556 | /* If overlay has a non-empty after-string, record it. */ | |
cafafe0b | 3557 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 GM |
3558 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
3559 | && XSTRING (str)->size) | |
3560 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
3561 | } | |
3562 | ||
3563 | /* Process overlays after the overlay center. */ | |
2970b9be | 3564 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3565 | { |
9472f927 | 3566 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3567 | xassert (OVERLAYP (overlay)); |
3568 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3569 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3570 | ||
cafafe0b | 3571 | if (start > charpos) |
5f5c8ee5 GM |
3572 | break; |
3573 | ||
3574 | /* Skip this overlay if it doesn't start or end at IT's current | |
3575 | position. */ | |
cafafe0b | 3576 | if (end != charpos && start != charpos) |
5f5c8ee5 GM |
3577 | continue; |
3578 | ||
3579 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3580 | window = Foverlay_get (overlay, Qwindow); | |
3581 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3582 | continue; | |
3583 | ||
cafafe0b GM |
3584 | /* If the text ``under'' the overlay is invisible, it has a zero |
3585 | dimension, and both before- and after-strings apply. */ | |
3586 | invisible = Foverlay_get (overlay, Qinvisible); | |
3587 | invis_p = TEXT_PROP_MEANS_INVISIBLE (invisible); | |
3588 | ||
5f5c8ee5 | 3589 | /* If overlay has a non-empty before-string, record it. */ |
cafafe0b | 3590 | if ((start == charpos || (end == charpos && invis_p)) |
5f5c8ee5 GM |
3591 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
3592 | && XSTRING (str)->size) | |
3593 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
3594 | ||
3595 | /* If overlay has a non-empty after-string, record it. */ | |
cafafe0b | 3596 | if ((end == charpos || (start == charpos && invis_p)) |
5f5c8ee5 GM |
3597 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) |
3598 | && XSTRING (str)->size) | |
3599 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
3600 | } | |
3601 | ||
3602 | #undef RECORD_OVERLAY_STRING | |
3603 | ||
3604 | /* Sort entries. */ | |
cafafe0b | 3605 | if (n > 1) |
2970b9be | 3606 | qsort (entries, n, sizeof *entries, compare_overlay_entries); |
5f5c8ee5 GM |
3607 | |
3608 | /* Record the total number of strings to process. */ | |
3609 | it->n_overlay_strings = n; | |
3610 | ||
3611 | /* IT->current.overlay_string_index is the number of overlay strings | |
3612 | that have already been consumed by IT. Copy some of the | |
3613 | remaining overlay strings to IT->overlay_strings. */ | |
3614 | i = 0; | |
3615 | j = it->current.overlay_string_index; | |
3616 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
3617 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 3618 | |
5f5c8ee5 GM |
3619 | CHECK_IT (it); |
3620 | } | |
3621 | ||
3622 | ||
3623 | /* Get the first chunk of overlay strings at IT's current buffer | |
5a08cbaf GM |
3624 | position, or at CHARPOS if that is > 0. Value is non-zero if at |
3625 | least one overlay string was found. */ | |
5f5c8ee5 GM |
3626 | |
3627 | static int | |
5a08cbaf | 3628 | get_overlay_strings (it, charpos) |
5f5c8ee5 | 3629 | struct it *it; |
5a08cbaf | 3630 | int charpos; |
5f5c8ee5 GM |
3631 | { |
3632 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
3633 | process. This fills IT->overlay_strings with strings, and sets | |
3634 | IT->n_overlay_strings to the total number of strings to process. | |
3635 | IT->pos.overlay_string_index has to be set temporarily to zero | |
3636 | because load_overlay_strings needs this; it must be set to -1 | |
3637 | when no overlay strings are found because a zero value would | |
3638 | indicate a position in the first overlay string. */ | |
3639 | it->current.overlay_string_index = 0; | |
5a08cbaf | 3640 | load_overlay_strings (it, charpos); |
5f5c8ee5 GM |
3641 | |
3642 | /* If we found overlay strings, set up IT to deliver display | |
3643 | elements from the first one. Otherwise set up IT to deliver | |
3644 | from current_buffer. */ | |
3645 | if (it->n_overlay_strings) | |
3646 | { | |
3647 | /* Make sure we know settings in current_buffer, so that we can | |
3648 | restore meaningful values when we're done with the overlay | |
3649 | strings. */ | |
3650 | compute_stop_pos (it); | |
3651 | xassert (it->face_id >= 0); | |
3652 | ||
3653 | /* Save IT's settings. They are restored after all overlay | |
3654 | strings have been processed. */ | |
3655 | xassert (it->sp == 0); | |
3656 | push_it (it); | |
3657 | ||
3658 | /* Set up IT to deliver display elements from the first overlay | |
3659 | string. */ | |
3660 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
5f5c8ee5 | 3661 | it->string = it->overlay_strings[0]; |
b2046df8 GM |
3662 | it->stop_charpos = 0; |
3663 | it->end_charpos = XSTRING (it->string)->size; | |
5f5c8ee5 GM |
3664 | it->multibyte_p = STRING_MULTIBYTE (it->string); |
3665 | xassert (STRINGP (it->string)); | |
3666 | it->method = next_element_from_string; | |
3667 | } | |
3668 | else | |
3669 | { | |
3670 | it->string = Qnil; | |
3671 | it->current.overlay_string_index = -1; | |
3672 | it->method = next_element_from_buffer; | |
3673 | } | |
3674 | ||
3675 | CHECK_IT (it); | |
3676 | ||
3677 | /* Value is non-zero if we found at least one overlay string. */ | |
3678 | return STRINGP (it->string); | |
3679 | } | |
3680 | ||
3681 | ||
3682 | \f | |
3683 | /*********************************************************************** | |
3684 | Saving and restoring state | |
3685 | ***********************************************************************/ | |
3686 | ||
3687 | /* Save current settings of IT on IT->stack. Called, for example, | |
3688 | before setting up IT for an overlay string, to be able to restore | |
3689 | IT's settings to what they were after the overlay string has been | |
3690 | processed. */ | |
3691 | ||
3692 | static void | |
3693 | push_it (it) | |
3694 | struct it *it; | |
3695 | { | |
3696 | struct iterator_stack_entry *p; | |
3697 | ||
3698 | xassert (it->sp < 2); | |
3699 | p = it->stack + it->sp; | |
3700 | ||
3701 | p->stop_charpos = it->stop_charpos; | |
3702 | xassert (it->face_id >= 0); | |
3703 | p->face_id = it->face_id; | |
3704 | p->string = it->string; | |
3705 | p->pos = it->current; | |
3706 | p->end_charpos = it->end_charpos; | |
3707 | p->string_nchars = it->string_nchars; | |
3708 | p->area = it->area; | |
3709 | p->multibyte_p = it->multibyte_p; | |
3710 | p->space_width = it->space_width; | |
3711 | p->font_height = it->font_height; | |
3712 | p->voffset = it->voffset; | |
3713 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
5a08cbaf | 3714 | p->display_ellipsis_p = 0; |
5f5c8ee5 GM |
3715 | ++it->sp; |
3716 | } | |
3717 | ||
3718 | ||
3719 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
3720 | more overlay strings must be processed, and we return to delivering | |
3721 | display elements from a buffer, or when the end of a string from a | |
3722 | `display' property is reached and we return to delivering display | |
3723 | elements from an overlay string, or from a buffer. */ | |
3724 | ||
3725 | static void | |
3726 | pop_it (it) | |
3727 | struct it *it; | |
3728 | { | |
3729 | struct iterator_stack_entry *p; | |
3730 | ||
3731 | xassert (it->sp > 0); | |
3732 | --it->sp; | |
3733 | p = it->stack + it->sp; | |
3734 | it->stop_charpos = p->stop_charpos; | |
3735 | it->face_id = p->face_id; | |
3736 | it->string = p->string; | |
3737 | it->current = p->pos; | |
3738 | it->end_charpos = p->end_charpos; | |
3739 | it->string_nchars = p->string_nchars; | |
3740 | it->area = p->area; | |
3741 | it->multibyte_p = p->multibyte_p; | |
3742 | it->space_width = p->space_width; | |
3743 | it->font_height = p->font_height; | |
3744 | it->voffset = p->voffset; | |
3745 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3746 | } | |
3747 | ||
3748 | ||
3749 | \f | |
3750 | /*********************************************************************** | |
3751 | Moving over lines | |
3752 | ***********************************************************************/ | |
3753 | ||
3754 | /* Set IT's current position to the previous line start. */ | |
3755 | ||
3756 | static void | |
3757 | back_to_previous_line_start (it) | |
3758 | struct it *it; | |
3759 | { | |
3760 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3761 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3762 | } | |
3763 | ||
3764 | ||
cafafe0b GM |
3765 | /* Move IT to the next line start. |
3766 | ||
3767 | Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if | |
3768 | we skipped over part of the text (as opposed to moving the iterator | |
3769 | continuously over the text). Otherwise, don't change the value | |
3770 | of *SKIPPED_P. | |
3771 | ||
3772 | Newlines may come from buffer text, overlay strings, or strings | |
3773 | displayed via the `display' property. That's the reason we can't | |
0fd37545 GM |
3774 | simply use find_next_newline_no_quit. |
3775 | ||
3776 | Note that this function may not skip over invisible text that is so | |
3777 | because of text properties and immediately follows a newline. If | |
3778 | it would, function reseat_at_next_visible_line_start, when called | |
3779 | from set_iterator_to_next, would effectively make invisible | |
3780 | characters following a newline part of the wrong glyph row, which | |
3781 | leads to wrong cursor motion. */ | |
5f5c8ee5 | 3782 | |
cafafe0b GM |
3783 | static int |
3784 | forward_to_next_line_start (it, skipped_p) | |
5f5c8ee5 | 3785 | struct it *it; |
cafafe0b | 3786 | int *skipped_p; |
5f5c8ee5 | 3787 | { |
54918e2b | 3788 | int old_selective, newline_found_p, n; |
cafafe0b GM |
3789 | const int MAX_NEWLINE_DISTANCE = 500; |
3790 | ||
0fd37545 GM |
3791 | /* If already on a newline, just consume it to avoid unintended |
3792 | skipping over invisible text below. */ | |
51695746 GM |
3793 | if (it->what == IT_CHARACTER |
3794 | && it->c == '\n' | |
3795 | && CHARPOS (it->position) == IT_CHARPOS (*it)) | |
0fd37545 GM |
3796 | { |
3797 | set_iterator_to_next (it, 0); | |
a77dc1ec | 3798 | it->c = 0; |
0fd37545 GM |
3799 | return 1; |
3800 | } | |
3801 | ||
54918e2b | 3802 | /* Don't handle selective display in the following. It's (a) |
0fd37545 GM |
3803 | unnecessary because it's done by the caller, and (b) leads to an |
3804 | infinite recursion because next_element_from_ellipsis indirectly | |
3805 | calls this function. */ | |
54918e2b GM |
3806 | old_selective = it->selective; |
3807 | it->selective = 0; | |
3808 | ||
cafafe0b GM |
3809 | /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements |
3810 | from buffer text. */ | |
3aec8722 GM |
3811 | for (n = newline_found_p = 0; |
3812 | !newline_found_p && n < MAX_NEWLINE_DISTANCE; | |
3813 | n += STRINGP (it->string) ? 0 : 1) | |
cafafe0b | 3814 | { |
8692ca92 GM |
3815 | if (!get_next_display_element (it)) |
3816 | break; | |
d02f1cb8 | 3817 | newline_found_p = it->what == IT_CHARACTER && it->c == '\n'; |
cafafe0b | 3818 | set_iterator_to_next (it, 0); |
cafafe0b GM |
3819 | } |
3820 | ||
3821 | /* If we didn't find a newline near enough, see if we can use a | |
3822 | short-cut. */ | |
3aec8722 | 3823 | if (n == MAX_NEWLINE_DISTANCE) |
cafafe0b GM |
3824 | { |
3825 | int start = IT_CHARPOS (*it); | |
3826 | int limit = find_next_newline_no_quit (start, 1); | |
3827 | Lisp_Object pos; | |
3828 | ||
3829 | xassert (!STRINGP (it->string)); | |
3830 | ||
3831 | /* If there isn't any `display' property in sight, and no | |
3832 | overlays, we can just use the position of the newline in | |
3833 | buffer text. */ | |
3834 | if (it->stop_charpos >= limit | |
3835 | || ((pos = Fnext_single_property_change (make_number (start), | |
3836 | Qdisplay, | |
3837 | Qnil, make_number (limit)), | |
3838 | NILP (pos)) | |
3839 | && next_overlay_change (start) == ZV)) | |
3840 | { | |
3841 | IT_CHARPOS (*it) = limit; | |
3842 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (limit); | |
3843 | *skipped_p = newline_found_p = 1; | |
3844 | } | |
3845 | else | |
3846 | { | |
3847 | while (get_next_display_element (it) | |
3848 | && !newline_found_p) | |
3849 | { | |
3850 | newline_found_p = ITERATOR_AT_END_OF_LINE_P (it); | |
3851 | set_iterator_to_next (it, 0); | |
3852 | } | |
3853 | } | |
3854 | } | |
3855 | ||
54918e2b | 3856 | it->selective = old_selective; |
cafafe0b | 3857 | return newline_found_p; |
5f5c8ee5 GM |
3858 | } |
3859 | ||
3860 | ||
3861 | /* Set IT's current position to the previous visible line start. Skip | |
3862 | invisible text that is so either due to text properties or due to | |
3863 | selective display. Caution: this does not change IT->current_x and | |
3864 | IT->hpos. */ | |
3865 | ||
3866 | static void | |
3867 | back_to_previous_visible_line_start (it) | |
3868 | struct it *it; | |
3869 | { | |
3870 | int visible_p = 0; | |
3871 | ||
3872 | /* Go back one newline if not on BEGV already. */ | |
3873 | if (IT_CHARPOS (*it) > BEGV) | |
3874 | back_to_previous_line_start (it); | |
3875 | ||
3876 | /* Move over lines that are invisible because of selective display | |
3877 | or text properties. */ | |
3878 | while (IT_CHARPOS (*it) > BEGV | |
3879 | && !visible_p) | |
3880 | { | |
3881 | visible_p = 1; | |
3882 | ||
3883 | /* If selective > 0, then lines indented more than that values | |
3884 | are invisible. */ | |
3885 | if (it->selective > 0 | |
3886 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3887 | it->selective)) | |
3888 | visible_p = 0; | |
5f5c8ee5 GM |
3889 | else |
3890 | { | |
3891 | Lisp_Object prop; | |
3892 | ||
6fc556fd KR |
3893 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
3894 | Qinvisible, it->window); | |
5f5c8ee5 GM |
3895 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
3896 | visible_p = 0; | |
3897 | } | |
5f5c8ee5 GM |
3898 | |
3899 | /* Back one more newline if the current one is invisible. */ | |
3900 | if (!visible_p) | |
3901 | back_to_previous_line_start (it); | |
3902 | } | |
3903 | ||
3904 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3905 | xassert (IT_CHARPOS (*it) == BEGV | |
3906 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3907 | CHECK_IT (it); | |
3908 | } | |
3909 | ||
3910 | ||
3911 | /* Reseat iterator IT at the previous visible line start. Skip | |
3912 | invisible text that is so either due to text properties or due to | |
3913 | selective display. At the end, update IT's overlay information, | |
3914 | face information etc. */ | |
3915 | ||
3916 | static void | |
3917 | reseat_at_previous_visible_line_start (it) | |
3918 | struct it *it; | |
3919 | { | |
3920 | back_to_previous_visible_line_start (it); | |
3921 | reseat (it, it->current.pos, 1); | |
3922 | CHECK_IT (it); | |
3923 | } | |
3924 | ||
3925 | ||
3926 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3927 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3928 | preceding the line start. Skip over invisible text that is so | |
3929 | because of selective display. Compute faces, overlays etc at the | |
3930 | new position. Note that this function does not skip over text that | |
3931 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3932 | |
3933 | static void | |
312246d1 | 3934 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3935 | struct it *it; |
312246d1 | 3936 | int on_newline_p; |
5f5c8ee5 | 3937 | { |
cafafe0b GM |
3938 | int newline_found_p, skipped_p = 0; |
3939 | ||
3940 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
3941 | ||
3942 | /* Skip over lines that are invisible because they are indented | |
3943 | more than the value of IT->selective. */ | |
3944 | if (it->selective > 0) | |
3945 | while (IT_CHARPOS (*it) < ZV | |
a77dc1ec | 3946 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), |
cafafe0b | 3947 | it->selective)) |
a77dc1ec GM |
3948 | { |
3949 | xassert (FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3950 | newline_found_p = forward_to_next_line_start (it, &skipped_p); | |
3951 | } | |
cafafe0b GM |
3952 | |
3953 | /* Position on the newline if that's what's requested. */ | |
3954 | if (on_newline_p && newline_found_p) | |
5f5c8ee5 | 3955 | { |
cafafe0b | 3956 | if (STRINGP (it->string)) |
5f5c8ee5 | 3957 | { |
cafafe0b GM |
3958 | if (IT_STRING_CHARPOS (*it) > 0) |
3959 | { | |
3960 | --IT_STRING_CHARPOS (*it); | |
3961 | --IT_STRING_BYTEPOS (*it); | |
3962 | } | |
5f5c8ee5 | 3963 | } |
cafafe0b | 3964 | else if (IT_CHARPOS (*it) > BEGV) |
312246d1 GM |
3965 | { |
3966 | --IT_CHARPOS (*it); | |
cafafe0b GM |
3967 | --IT_BYTEPOS (*it); |
3968 | reseat (it, it->current.pos, 0); | |
312246d1 | 3969 | } |
5f5c8ee5 | 3970 | } |
cafafe0b GM |
3971 | else if (skipped_p) |
3972 | reseat (it, it->current.pos, 0); | |
5f5c8ee5 GM |
3973 | |
3974 | CHECK_IT (it); | |
3975 | } | |
3976 | ||
3977 | ||
3978 | \f | |
3979 | /*********************************************************************** | |
3980 | Changing an iterator's position | |
3981 | ***********************************************************************/ | |
3982 | ||
3983 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3984 | is non-zero, always check for text properties at the new position. | |
3985 | Otherwise, text properties are only looked up if POS >= | |
3986 | IT->check_charpos of a property. */ | |
3987 | ||
3988 | static void | |
3989 | reseat (it, pos, force_p) | |
3990 | struct it *it; | |
3991 | struct text_pos pos; | |
3992 | int force_p; | |
3993 | { | |
3994 | int original_pos = IT_CHARPOS (*it); | |
3995 | ||
3996 | reseat_1 (it, pos, 0); | |
3997 | ||
3998 | /* Determine where to check text properties. Avoid doing it | |
3999 | where possible because text property lookup is very expensive. */ | |
4000 | if (force_p | |
4001 | || CHARPOS (pos) > it->stop_charpos | |
4002 | || CHARPOS (pos) < original_pos) | |
4003 | handle_stop (it); | |
4004 | ||
4005 | CHECK_IT (it); | |
4006 | } | |
4007 | ||
4008 | ||
4009 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
4010 | IT->stop_pos to POS, also. */ | |
4011 | ||
4012 | static void | |
4013 | reseat_1 (it, pos, set_stop_p) | |
4014 | struct it *it; | |
4015 | struct text_pos pos; | |
4016 | int set_stop_p; | |
4017 | { | |
4018 | /* Don't call this function when scanning a C string. */ | |
4019 | xassert (it->s == NULL); | |
4020 | ||
4021 | /* POS must be a reasonable value. */ | |
4022 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
4023 | ||
4024 | it->current.pos = it->position = pos; | |
4025 | XSETBUFFER (it->object, current_buffer); | |
78c663d8 | 4026 | it->end_charpos = ZV; |
5f5c8ee5 GM |
4027 | it->dpvec = NULL; |
4028 | it->current.dpvec_index = -1; | |
4029 | it->current.overlay_string_index = -1; | |
4030 | IT_STRING_CHARPOS (*it) = -1; | |
4031 | IT_STRING_BYTEPOS (*it) = -1; | |
4032 | it->string = Qnil; | |
4033 | it->method = next_element_from_buffer; | |
06fd3792 | 4034 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); |
5f5c8ee5 | 4035 | it->sp = 0; |
4aad61f8 | 4036 | it->face_before_selective_p = 0; |
5f5c8ee5 GM |
4037 | |
4038 | if (set_stop_p) | |
4039 | it->stop_charpos = CHARPOS (pos); | |
4040 | } | |
4041 | ||
4042 | ||
4043 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
4044 | If S is non-null, it is a C string to iterate over. Otherwise, | |
4045 | STRING gives a Lisp string to iterate over. | |
4046 | ||
4047 | If PRECISION > 0, don't return more then PRECISION number of | |
4048 | characters from the string. | |
4049 | ||
4050 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
4051 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
4052 | field width. | |
4053 | ||
4054 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
4055 | MULTIBYTE > 0 means enable it, | |
4056 | MULTIBYTE < 0 means use IT->multibyte_p. | |
4057 | ||
4058 | IT must be initialized via a prior call to init_iterator before | |
4059 | calling this function. */ | |
4060 | ||
4061 | static void | |
4062 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
4063 | struct it *it; | |
4064 | unsigned char *s; | |
4065 | Lisp_Object string; | |
4066 | int charpos; | |
4067 | int precision, field_width, multibyte; | |
4068 | { | |
4069 | /* No region in strings. */ | |
4070 | it->region_beg_charpos = it->region_end_charpos = -1; | |
4071 | ||
4072 | /* No text property checks performed by default, but see below. */ | |
4073 | it->stop_charpos = -1; | |
4074 | ||
4075 | /* Set iterator position and end position. */ | |
4076 | bzero (&it->current, sizeof it->current); | |
4077 | it->current.overlay_string_index = -1; | |
4078 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
4079 | xassert (charpos >= 0); |
4080 | ||
e719f5ae GM |
4081 | /* If STRING is specified, use its multibyteness, otherwise use the |
4082 | setting of MULTIBYTE, if specified. */ | |
cabf45da | 4083 | if (multibyte >= 0) |
5f5c8ee5 GM |
4084 | it->multibyte_p = multibyte > 0; |
4085 | ||
4086 | if (s == NULL) | |
4087 | { | |
4088 | xassert (STRINGP (string)); | |
4089 | it->string = string; | |
4090 | it->s = NULL; | |
4091 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
4092 | it->method = next_element_from_string; | |
4093 | it->current.string_pos = string_pos (charpos, string); | |
4094 | } | |
4095 | else | |
4096 | { | |
4097 | it->s = s; | |
4098 | it->string = Qnil; | |
4099 | ||
4100 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
4101 | for displaying C strings. */ | |
4102 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
4103 | if (it->multibyte_p) | |
4104 | { | |
4105 | it->current.pos = c_string_pos (charpos, s, 1); | |
4106 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
4107 | } | |
4108 | else | |
4109 | { | |
4110 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
4111 | it->end_charpos = it->string_nchars = strlen (s); | |
4112 | } | |
4113 | ||
4114 | it->method = next_element_from_c_string; | |
4115 | } | |
4116 | ||
4117 | /* PRECISION > 0 means don't return more than PRECISION characters | |
4118 | from the string. */ | |
4119 | if (precision > 0 && it->end_charpos - charpos > precision) | |
4120 | it->end_charpos = it->string_nchars = charpos + precision; | |
4121 | ||
4122 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
4123 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
4124 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
4125 | padding with `-' at the end of a mode line. */ | |
4126 | if (field_width < 0) | |
4127 | field_width = INFINITY; | |
4128 | if (field_width > it->end_charpos - charpos) | |
4129 | it->end_charpos = charpos + field_width; | |
4130 | ||
4131 | /* Use the standard display table for displaying strings. */ | |
4132 | if (DISP_TABLE_P (Vstandard_display_table)) | |
4133 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
4134 | ||
4135 | it->stop_charpos = charpos; | |
4136 | CHECK_IT (it); | |
4137 | } | |
4138 | ||
4139 | ||
4140 | \f | |
4141 | /*********************************************************************** | |
4142 | Iteration | |
4143 | ***********************************************************************/ | |
4144 | ||
4145 | /* Load IT's display element fields with information about the next | |
4146 | display element from the current position of IT. Value is zero if | |
4147 | end of buffer (or C string) is reached. */ | |
4148 | ||
4149 | int | |
4150 | get_next_display_element (it) | |
4151 | struct it *it; | |
4152 | { | |
4153 | /* Non-zero means that we found an display element. Zero means that | |
4154 | we hit the end of what we iterate over. Performance note: the | |
4155 | function pointer `method' used here turns out to be faster than | |
4156 | using a sequence of if-statements. */ | |
4157 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
4158 | |
4159 | if (it->what == IT_CHARACTER) | |
4160 | { | |
4161 | /* Map via display table or translate control characters. | |
4162 | IT->c, IT->len etc. have been set to the next character by | |
4163 | the function call above. If we have a display table, and it | |
4164 | contains an entry for IT->c, translate it. Don't do this if | |
4165 | IT->c itself comes from a display table, otherwise we could | |
4166 | end up in an infinite recursion. (An alternative could be to | |
4167 | count the recursion depth of this function and signal an | |
4168 | error when a certain maximum depth is reached.) Is it worth | |
4169 | it? */ | |
4170 | if (success_p && it->dpvec == NULL) | |
4171 | { | |
4172 | Lisp_Object dv; | |
4173 | ||
4174 | if (it->dp | |
4175 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
4176 | VECTORP (dv))) | |
4177 | { | |
4178 | struct Lisp_Vector *v = XVECTOR (dv); | |
4179 | ||
4180 | /* Return the first character from the display table | |
4181 | entry, if not empty. If empty, don't display the | |
4182 | current character. */ | |
4183 | if (v->size) | |
4184 | { | |
4185 | it->dpvec_char_len = it->len; | |
4186 | it->dpvec = v->contents; | |
4187 | it->dpend = v->contents + v->size; | |
4188 | it->current.dpvec_index = 0; | |
4189 | it->method = next_element_from_display_vector; | |
7eee47cc GM |
4190 | success_p = get_next_display_element (it); |
4191 | } | |
4192 | else | |
4193 | { | |
4194 | set_iterator_to_next (it, 0); | |
4195 | success_p = get_next_display_element (it); | |
5f5c8ee5 | 4196 | } |
5f5c8ee5 GM |
4197 | } |
4198 | ||
4199 | /* Translate control characters into `\003' or `^C' form. | |
4200 | Control characters coming from a display table entry are | |
4201 | currently not translated because we use IT->dpvec to hold | |
4202 | the translation. This could easily be changed but I | |
197516c2 KH |
4203 | don't believe that it is worth doing. |
4204 | ||
4205 | Non-printable multibyte characters are also translated | |
4206 | octal form. */ | |
5f5c8ee5 GM |
4207 | else if ((it->c < ' ' |
4208 | && (it->area != TEXT_AREA | |
c6e89d6c | 4209 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 4210 | || (it->c >= 127 |
197516c2 KH |
4211 | && it->len == 1) |
4212 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
4213 | { |
4214 | /* IT->c is a control character which must be displayed | |
4215 | either as '\003' or as `^C' where the '\\' and '^' | |
4216 | can be defined in the display table. Fill | |
4217 | IT->ctl_chars with glyphs for what we have to | |
4218 | display. Then, set IT->dpvec to these glyphs. */ | |
4219 | GLYPH g; | |
4220 | ||
54c85a23 | 4221 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
4222 | { |
4223 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
4224 | if (it->dp | |
4225 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
4226 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
4227 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
4228 | else | |
4229 | g = FAST_MAKE_GLYPH ('^', 0); | |
4230 | XSETINT (it->ctl_chars[0], g); | |
4231 | ||
4232 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
4233 | XSETINT (it->ctl_chars[1], g); | |
4234 | ||
4235 | /* Set up IT->dpvec and return first character from it. */ | |
4236 | it->dpvec_char_len = it->len; | |
4237 | it->dpvec = it->ctl_chars; | |
4238 | it->dpend = it->dpvec + 2; | |
4239 | it->current.dpvec_index = 0; | |
4240 | it->method = next_element_from_display_vector; | |
4241 | get_next_display_element (it); | |
4242 | } | |
4243 | else | |
4244 | { | |
260a86a0 | 4245 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 4246 | int len; |
197516c2 KH |
4247 | int i; |
4248 | GLYPH escape_glyph; | |
4249 | ||
5f5c8ee5 GM |
4250 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
4251 | if (it->dp | |
4252 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
4253 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 4254 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 4255 | else |
197516c2 KH |
4256 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
4257 | ||
c5924f47 KH |
4258 | if (SINGLE_BYTE_CHAR_P (it->c)) |
4259 | str[0] = it->c, len = 1; | |
4260 | else | |
ea9dd091 GM |
4261 | { |
4262 | len = CHAR_STRING_NO_SIGNAL (it->c, str); | |
4263 | if (len < 0) | |
4264 | { | |
4265 | /* It's an invalid character, which | |
4266 | shouldn't happen actually, but due to | |
4267 | bugs it may happen. Let's print the char | |
4268 | as is, there's not much meaningful we can | |
4269 | do with it. */ | |
4270 | str[0] = it->c; | |
4271 | str[1] = it->c >> 8; | |
4272 | str[2] = it->c >> 16; | |
4273 | str[3] = it->c >> 24; | |
4274 | len = 4; | |
4275 | } | |
4276 | } | |
c5924f47 | 4277 | |
197516c2 KH |
4278 | for (i = 0; i < len; i++) |
4279 | { | |
4280 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
4281 | /* Insert three more glyphs into IT->ctl_chars for | |
4282 | the octal display of the character. */ | |
4283 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
4284 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
4285 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
4286 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
4287 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
4288 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
4289 | } | |
5f5c8ee5 GM |
4290 | |
4291 | /* Set up IT->dpvec and return the first character | |
4292 | from it. */ | |
4293 | it->dpvec_char_len = it->len; | |
4294 | it->dpvec = it->ctl_chars; | |
197516c2 | 4295 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
4296 | it->current.dpvec_index = 0; |
4297 | it->method = next_element_from_display_vector; | |
4298 | get_next_display_element (it); | |
4299 | } | |
4300 | } | |
4301 | } | |
4302 | ||
980806b6 KH |
4303 | /* Adjust face id for a multibyte character. There are no |
4304 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
4305 | if (it->multibyte_p |
4306 | && success_p | |
980806b6 | 4307 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 4308 | { |
980806b6 KH |
4309 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
4310 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
4311 | } |
4312 | } | |
4313 | ||
4314 | /* Is this character the last one of a run of characters with | |
4315 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
4316 | if (it->face_box_p | |
4317 | && it->s == NULL) | |
4318 | { | |
4319 | int face_id; | |
4320 | struct face *face; | |
4321 | ||
4322 | it->end_of_box_run_p | |
4323 | = ((face_id = face_after_it_pos (it), | |
4324 | face_id != it->face_id) | |
4325 | && (face = FACE_FROM_ID (it->f, face_id), | |
4326 | face->box == FACE_NO_BOX)); | |
4327 | } | |
4328 | ||
4329 | /* Value is 0 if end of buffer or string reached. */ | |
4330 | return success_p; | |
4331 | } | |
4332 | ||
4333 | ||
4334 | /* Move IT to the next display element. | |
4335 | ||
cafafe0b GM |
4336 | RESEAT_P non-zero means if called on a newline in buffer text, |
4337 | skip to the next visible line start. | |
4338 | ||
5f5c8ee5 GM |
4339 | Functions get_next_display_element and set_iterator_to_next are |
4340 | separate because I find this arrangement easier to handle than a | |
4341 | get_next_display_element function that also increments IT's | |
4342 | position. The way it is we can first look at an iterator's current | |
4343 | display element, decide whether it fits on a line, and if it does, | |
4344 | increment the iterator position. The other way around we probably | |
4345 | would either need a flag indicating whether the iterator has to be | |
4346 | incremented the next time, or we would have to implement a | |
4347 | decrement position function which would not be easy to write. */ | |
4348 | ||
4349 | void | |
cafafe0b | 4350 | set_iterator_to_next (it, reseat_p) |
5f5c8ee5 | 4351 | struct it *it; |
cafafe0b | 4352 | int reseat_p; |
5f5c8ee5 | 4353 | { |
483de32b GM |
4354 | /* Reset flags indicating start and end of a sequence of characters |
4355 | with box. Reset them at the start of this function because | |
4356 | moving the iterator to a new position might set them. */ | |
4357 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
4358 | ||
5f5c8ee5 GM |
4359 | if (it->method == next_element_from_buffer) |
4360 | { | |
4361 | /* The current display element of IT is a character from | |
4362 | current_buffer. Advance in the buffer, and maybe skip over | |
4363 | invisible lines that are so because of selective display. */ | |
cafafe0b | 4364 | if (ITERATOR_AT_END_OF_LINE_P (it) && reseat_p) |
312246d1 | 4365 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4366 | else |
4367 | { | |
4368 | xassert (it->len != 0); | |
4369 | IT_BYTEPOS (*it) += it->len; | |
4370 | IT_CHARPOS (*it) += 1; | |
4371 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
4372 | } | |
4373 | } | |
260a86a0 KH |
4374 | else if (it->method == next_element_from_composition) |
4375 | { | |
4376 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
4377 | if (STRINGP (it->string)) | |
4378 | { | |
4379 | IT_STRING_BYTEPOS (*it) += it->len; | |
4380 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
4381 | it->method = next_element_from_string; | |
4382 | goto consider_string_end; | |
4383 | } | |
4384 | else | |
4385 | { | |
4386 | IT_BYTEPOS (*it) += it->len; | |
4387 | IT_CHARPOS (*it) += it->cmp_len; | |
4388 | it->method = next_element_from_buffer; | |
4389 | } | |
4390 | } | |
5f5c8ee5 GM |
4391 | else if (it->method == next_element_from_c_string) |
4392 | { | |
4393 | /* Current display element of IT is from a C string. */ | |
4394 | IT_BYTEPOS (*it) += it->len; | |
4395 | IT_CHARPOS (*it) += 1; | |
4396 | } | |
4397 | else if (it->method == next_element_from_display_vector) | |
4398 | { | |
4399 | /* Current display element of IT is from a display table entry. | |
4400 | Advance in the display table definition. Reset it to null if | |
4401 | end reached, and continue with characters from buffers/ | |
4402 | strings. */ | |
4403 | ++it->current.dpvec_index; | |
286bcbc9 | 4404 | |
980806b6 KH |
4405 | /* Restore face of the iterator to what they were before the |
4406 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 4407 | it->face_id = it->saved_face_id; |
286bcbc9 | 4408 | |
5f5c8ee5 GM |
4409 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
4410 | { | |
4411 | if (it->s) | |
4412 | it->method = next_element_from_c_string; | |
4413 | else if (STRINGP (it->string)) | |
4414 | it->method = next_element_from_string; | |
4415 | else | |
4416 | it->method = next_element_from_buffer; | |
4417 | ||
4418 | it->dpvec = NULL; | |
4419 | it->current.dpvec_index = -1; | |
4420 | ||
312246d1 GM |
4421 | /* Skip over characters which were displayed via IT->dpvec. */ |
4422 | if (it->dpvec_char_len < 0) | |
4423 | reseat_at_next_visible_line_start (it, 1); | |
4424 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
4425 | { |
4426 | it->len = it->dpvec_char_len; | |
cafafe0b | 4427 | set_iterator_to_next (it, reseat_p); |
5f5c8ee5 GM |
4428 | } |
4429 | } | |
4430 | } | |
4431 | else if (it->method == next_element_from_string) | |
4432 | { | |
4433 | /* Current display element is a character from a Lisp string. */ | |
4434 | xassert (it->s == NULL && STRINGP (it->string)); | |
4435 | IT_STRING_BYTEPOS (*it) += it->len; | |
4436 | IT_STRING_CHARPOS (*it) += 1; | |
4437 | ||
4438 | consider_string_end: | |
4439 | ||
4440 | if (it->current.overlay_string_index >= 0) | |
4441 | { | |
4442 | /* IT->string is an overlay string. Advance to the | |
4443 | next, if there is one. */ | |
4444 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
4445 | next_overlay_string (it); | |
4446 | } | |
4447 | else | |
4448 | { | |
4449 | /* IT->string is not an overlay string. If we reached | |
4450 | its end, and there is something on IT->stack, proceed | |
4451 | with what is on the stack. This can be either another | |
4452 | string, this time an overlay string, or a buffer. */ | |
4453 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
4454 | && it->sp > 0) | |
4455 | { | |
4456 | pop_it (it); | |
4457 | if (!STRINGP (it->string)) | |
4458 | it->method = next_element_from_buffer; | |
b2046df8 GM |
4459 | else |
4460 | goto consider_string_end; | |
5f5c8ee5 GM |
4461 | } |
4462 | } | |
4463 | } | |
4464 | else if (it->method == next_element_from_image | |
4465 | || it->method == next_element_from_stretch) | |
4466 | { | |
4467 | /* The position etc with which we have to proceed are on | |
4468 | the stack. The position may be at the end of a string, | |
4469 | if the `display' property takes up the whole string. */ | |
4470 | pop_it (it); | |
4471 | it->image_id = 0; | |
4472 | if (STRINGP (it->string)) | |
4473 | { | |
4474 | it->method = next_element_from_string; | |
4475 | goto consider_string_end; | |
4476 | } | |
4477 | else | |
4478 | it->method = next_element_from_buffer; | |
4479 | } | |
4480 | else | |
4481 | /* There are no other methods defined, so this should be a bug. */ | |
4482 | abort (); | |
4483 | ||
5f5c8ee5 GM |
4484 | xassert (it->method != next_element_from_string |
4485 | || (STRINGP (it->string) | |
4486 | && IT_STRING_CHARPOS (*it) >= 0)); | |
4487 | } | |
4488 | ||
4489 | ||
4490 | /* Load IT's display element fields with information about the next | |
4491 | display element which comes from a display table entry or from the | |
4492 | result of translating a control character to one of the forms `^C' | |
4493 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
4494 | ||
4495 | static int | |
4496 | next_element_from_display_vector (it) | |
4497 | struct it *it; | |
4498 | { | |
4499 | /* Precondition. */ | |
4500 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
4501 | ||
4502 | /* Remember the current face id in case glyphs specify faces. | |
4503 | IT's face is restored in set_iterator_to_next. */ | |
4504 | it->saved_face_id = it->face_id; | |
4505 | ||
4506 | if (INTEGERP (*it->dpvec) | |
4507 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
4508 | { | |
4509 | int lface_id; | |
4510 | GLYPH g; | |
4511 | ||
4512 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
4513 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 4514 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
4515 | |
4516 | /* The entry may contain a face id to use. Such a face id is | |
4517 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 4518 | zero means no face is specified. */ |
5f5c8ee5 GM |
4519 | lface_id = FAST_GLYPH_FACE (g); |
4520 | if (lface_id) | |
4521 | { | |
969065c3 | 4522 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
4523 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
4524 | if (face_id >= 0) | |
969065c3 | 4525 | it->face_id = face_id; |
5f5c8ee5 GM |
4526 | } |
4527 | } | |
4528 | else | |
4529 | /* Display table entry is invalid. Return a space. */ | |
4530 | it->c = ' ', it->len = 1; | |
4531 | ||
4532 | /* Don't change position and object of the iterator here. They are | |
4533 | still the values of the character that had this display table | |
4534 | entry or was translated, and that's what we want. */ | |
4535 | it->what = IT_CHARACTER; | |
4536 | return 1; | |
4537 | } | |
4538 | ||
4539 | ||
4540 | /* Load IT with the next display element from Lisp string IT->string. | |
4541 | IT->current.string_pos is the current position within the string. | |
4542 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
4543 | overlay string. */ | |
4544 | ||
4545 | static int | |
4546 | next_element_from_string (it) | |
4547 | struct it *it; | |
4548 | { | |
4549 | struct text_pos position; | |
4550 | ||
4551 | xassert (STRINGP (it->string)); | |
4552 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
4553 | position = it->current.string_pos; | |
4554 | ||
4555 | /* Time to check for invisible text? */ | |
4556 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
4557 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
4558 | { | |
4559 | handle_stop (it); | |
4560 | ||
4561 | /* Since a handler may have changed IT->method, we must | |
4562 | recurse here. */ | |
4563 | return get_next_display_element (it); | |
4564 | } | |
4565 | ||
4566 | if (it->current.overlay_string_index >= 0) | |
4567 | { | |
4568 | /* Get the next character from an overlay string. In overlay | |
4569 | strings, There is no field width or padding with spaces to | |
4570 | do. */ | |
4571 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
4572 | { | |
4573 | it->what = IT_EOB; | |
4574 | return 0; | |
4575 | } | |
4576 | else if (STRING_MULTIBYTE (it->string)) | |
4577 | { | |
4578 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
4579 | - IT_STRING_BYTEPOS (*it)); | |
4580 | unsigned char *s = (XSTRING (it->string)->data | |
4581 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4582 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
4583 | } |
4584 | else | |
4585 | { | |
4586 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
4587 | it->len = 1; | |
4588 | } | |
4589 | } | |
4590 | else | |
4591 | { | |
4592 | /* Get the next character from a Lisp string that is not an | |
4593 | overlay string. Such strings come from the mode line, for | |
4594 | example. We may have to pad with spaces, or truncate the | |
4595 | string. See also next_element_from_c_string. */ | |
4596 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
4597 | { | |
4598 | it->what = IT_EOB; | |
4599 | return 0; | |
4600 | } | |
4601 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
4602 | { | |
4603 | /* Pad with spaces. */ | |
4604 | it->c = ' ', it->len = 1; | |
4605 | CHARPOS (position) = BYTEPOS (position) = -1; | |
4606 | } | |
4607 | else if (STRING_MULTIBYTE (it->string)) | |
4608 | { | |
4609 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
4610 | - IT_STRING_BYTEPOS (*it)); | |
4611 | unsigned char *s = (XSTRING (it->string)->data | |
4612 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 4613 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
4614 | } |
4615 | else | |
4616 | { | |
4617 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
4618 | it->len = 1; | |
4619 | } | |
4620 | } | |
4621 | ||
4622 | /* Record what we have and where it came from. Note that we store a | |
4623 | buffer position in IT->position although it could arguably be a | |
4624 | string position. */ | |
4625 | it->what = IT_CHARACTER; | |
4626 | it->object = it->string; | |
4627 | it->position = position; | |
4628 | return 1; | |
4629 | } | |
4630 | ||
4631 | ||
4632 | /* Load IT with next display element from C string IT->s. | |
4633 | IT->string_nchars is the maximum number of characters to return | |
4634 | from the string. IT->end_charpos may be greater than | |
4635 | IT->string_nchars when this function is called, in which case we | |
4636 | may have to return padding spaces. Value is zero if end of string | |
4637 | reached, including padding spaces. */ | |
4638 | ||
4639 | static int | |
4640 | next_element_from_c_string (it) | |
4641 | struct it *it; | |
4642 | { | |
4643 | int success_p = 1; | |
4644 | ||
4645 | xassert (it->s); | |
4646 | it->what = IT_CHARACTER; | |
4647 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
4648 | it->object = Qnil; | |
4649 | ||
4650 | /* IT's position can be greater IT->string_nchars in case a field | |
4651 | width or precision has been specified when the iterator was | |
4652 | initialized. */ | |
4653 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4654 | { | |
4655 | /* End of the game. */ | |
4656 | it->what = IT_EOB; | |
4657 | success_p = 0; | |
4658 | } | |
4659 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
4660 | { | |
4661 | /* Pad with spaces. */ | |
4662 | it->c = ' ', it->len = 1; | |
4663 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
4664 | } | |
4665 | else if (it->multibyte_p) | |
4666 | { | |
4667 | /* Implementation note: The calls to strlen apparently aren't a | |
4668 | performance problem because there is no noticeable performance | |
4669 | difference between Emacs running in unibyte or multibyte mode. */ | |
4670 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
4671 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
4672 | maxlen, &it->len); | |
5f5c8ee5 GM |
4673 | } |
4674 | else | |
4675 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
4676 | ||
4677 | return success_p; | |
4678 | } | |
4679 | ||
4680 | ||
4681 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
4682 | The definition of the ellipsis glyphs may come from a display table | |
4683 | entry. This function Fills IT with the first glyph from the | |
4684 | ellipsis if an ellipsis is to be displayed. */ | |
4685 | ||
13f19968 | 4686 | static int |
5f5c8ee5 GM |
4687 | next_element_from_ellipsis (it) |
4688 | struct it *it; | |
4689 | { | |
13f19968 | 4690 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 4691 | { |
13f19968 GM |
4692 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
4693 | { | |
4694 | /* Use the display table definition for `...'. Invalid glyphs | |
4695 | will be handled by the method returning elements from dpvec. */ | |
4696 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
4697 | it->dpvec_char_len = it->len; | |
4698 | it->dpvec = v->contents; | |
4699 | it->dpend = v->contents + v->size; | |
4700 | it->current.dpvec_index = 0; | |
4701 | it->method = next_element_from_display_vector; | |
4702 | } | |
4703 | else | |
4704 | { | |
4705 | /* Use default `...' which is stored in default_invis_vector. */ | |
4706 | it->dpvec_char_len = it->len; | |
4707 | it->dpvec = default_invis_vector; | |
4708 | it->dpend = default_invis_vector + 3; | |
4709 | it->current.dpvec_index = 0; | |
4710 | it->method = next_element_from_display_vector; | |
4711 | } | |
5f5c8ee5 | 4712 | } |
13f19968 | 4713 | else |
54918e2b | 4714 | { |
4aad61f8 GM |
4715 | /* The face at the current position may be different from the |
4716 | face we find after the invisible text. Remember what it | |
4717 | was in IT->saved_face_id, and signal that it's there by | |
4718 | setting face_before_selective_p. */ | |
4719 | it->saved_face_id = it->face_id; | |
54918e2b GM |
4720 | it->method = next_element_from_buffer; |
4721 | reseat_at_next_visible_line_start (it, 1); | |
4aad61f8 | 4722 | it->face_before_selective_p = 1; |
54918e2b | 4723 | } |
13f19968 GM |
4724 | |
4725 | return get_next_display_element (it); | |
5f5c8ee5 GM |
4726 | } |
4727 | ||
4728 | ||
4729 | /* Deliver an image display element. The iterator IT is already | |
4730 | filled with image information (done in handle_display_prop). Value | |
4731 | is always 1. */ | |
4732 | ||
4733 | ||
4734 | static int | |
4735 | next_element_from_image (it) | |
4736 | struct it *it; | |
4737 | { | |
4738 | it->what = IT_IMAGE; | |
4739 | return 1; | |
4740 | } | |
4741 | ||
4742 | ||
4743 | /* Fill iterator IT with next display element from a stretch glyph | |
4744 | property. IT->object is the value of the text property. Value is | |
4745 | always 1. */ | |
4746 | ||
4747 | static int | |
4748 | next_element_from_stretch (it) | |
4749 | struct it *it; | |
4750 | { | |
4751 | it->what = IT_STRETCH; | |
4752 | return 1; | |
4753 | } | |
4754 | ||
4755 | ||
4756 | /* Load IT with the next display element from current_buffer. Value | |
4757 | is zero if end of buffer reached. IT->stop_charpos is the next | |
4758 | position at which to stop and check for text properties or buffer | |
4759 | end. */ | |
4760 | ||
4761 | static int | |
4762 | next_element_from_buffer (it) | |
4763 | struct it *it; | |
4764 | { | |
4765 | int success_p = 1; | |
4766 | ||
4767 | /* Check this assumption, otherwise, we would never enter the | |
4768 | if-statement, below. */ | |
4769 | xassert (IT_CHARPOS (*it) >= BEGV | |
4770 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
4771 | ||
4772 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
4773 | { | |
4774 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4775 | { | |
4776 | int overlay_strings_follow_p; | |
4777 | ||
4778 | /* End of the game, except when overlay strings follow that | |
4779 | haven't been returned yet. */ | |
4780 | if (it->overlay_strings_at_end_processed_p) | |
4781 | overlay_strings_follow_p = 0; | |
4782 | else | |
4783 | { | |
4784 | it->overlay_strings_at_end_processed_p = 1; | |
5a08cbaf | 4785 | overlay_strings_follow_p = get_overlay_strings (it, 0); |
5f5c8ee5 GM |
4786 | } |
4787 | ||
4788 | if (overlay_strings_follow_p) | |
4789 | success_p = get_next_display_element (it); | |
4790 | else | |
4791 | { | |
4792 | it->what = IT_EOB; | |
4793 | it->position = it->current.pos; | |
4794 | success_p = 0; | |
4795 | } | |
4796 | } | |
4797 | else | |
4798 | { | |
4799 | handle_stop (it); | |
4800 | return get_next_display_element (it); | |
4801 | } | |
4802 | } | |
4803 | else | |
4804 | { | |
4805 | /* No face changes, overlays etc. in sight, so just return a | |
4806 | character from current_buffer. */ | |
4807 | unsigned char *p; | |
4808 | ||
4809 | /* Maybe run the redisplay end trigger hook. Performance note: | |
4810 | This doesn't seem to cost measurable time. */ | |
4811 | if (it->redisplay_end_trigger_charpos | |
4812 | && it->glyph_row | |
4813 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
4814 | run_redisplay_end_trigger_hook (it); | |
4815 | ||
4816 | /* Get the next character, maybe multibyte. */ | |
4817 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 4818 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
4819 | { |
4820 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
4821 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 4822 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
4823 | } |
4824 | else | |
4825 | it->c = *p, it->len = 1; | |
4826 | ||
4827 | /* Record what we have and where it came from. */ | |
4828 | it->what = IT_CHARACTER;; | |
4829 | it->object = it->w->buffer; | |
4830 | it->position = it->current.pos; | |
4831 | ||
4832 | /* Normally we return the character found above, except when we | |
4833 | really want to return an ellipsis for selective display. */ | |
4834 | if (it->selective) | |
4835 | { | |
4836 | if (it->c == '\n') | |
4837 | { | |
4838 | /* A value of selective > 0 means hide lines indented more | |
4839 | than that number of columns. */ | |
4840 | if (it->selective > 0 | |
4841 | && IT_CHARPOS (*it) + 1 < ZV | |
4842 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
4843 | IT_BYTEPOS (*it) + 1, | |
4844 | it->selective)) | |
312246d1 | 4845 | { |
13f19968 | 4846 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
4847 | it->dpvec_char_len = -1; |
4848 | } | |
5f5c8ee5 GM |
4849 | } |
4850 | else if (it->c == '\r' && it->selective == -1) | |
4851 | { | |
4852 | /* A value of selective == -1 means that everything from the | |
4853 | CR to the end of the line is invisible, with maybe an | |
4854 | ellipsis displayed for it. */ | |
13f19968 | 4855 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4856 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4857 | } |
4858 | } | |
4859 | } | |
4860 | ||
4861 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4862 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4863 | return success_p; |
4864 | } | |
4865 | ||
4866 | ||
4867 | /* Run the redisplay end trigger hook for IT. */ | |
4868 | ||
4869 | static void | |
4870 | run_redisplay_end_trigger_hook (it) | |
4871 | struct it *it; | |
4872 | { | |
4873 | Lisp_Object args[3]; | |
4874 | ||
4875 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4876 | displaying something, or otherwise we should not run the hook. */ | |
4877 | xassert (it->glyph_row); | |
4878 | ||
4879 | /* Set up hook arguments. */ | |
4880 | args[0] = Qredisplay_end_trigger_functions; | |
4881 | args[1] = it->window; | |
4882 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4883 | it->redisplay_end_trigger_charpos = 0; | |
4884 | ||
4885 | /* Since we are *trying* to run these functions, don't try to run | |
4886 | them again, even if they get an error. */ | |
4887 | it->w->redisplay_end_trigger = Qnil; | |
4888 | Frun_hook_with_args (3, args); | |
4889 | ||
4890 | /* Notice if it changed the face of the character we are on. */ | |
4891 | handle_face_prop (it); | |
4892 | } | |
4893 | ||
4894 | ||
260a86a0 KH |
4895 | /* Deliver a composition display element. The iterator IT is already |
4896 | filled with composition information (done in | |
4897 | handle_composition_prop). Value is always 1. */ | |
4898 | ||
4899 | static int | |
4900 | next_element_from_composition (it) | |
4901 | struct it *it; | |
4902 | { | |
4903 | it->what = IT_COMPOSITION; | |
4904 | it->position = (STRINGP (it->string) | |
4905 | ? it->current.string_pos | |
4906 | : it->current.pos); | |
4907 | return 1; | |
4908 | } | |
4909 | ||
4910 | ||
5f5c8ee5 GM |
4911 | \f |
4912 | /*********************************************************************** | |
4913 | Moving an iterator without producing glyphs | |
4914 | ***********************************************************************/ | |
4915 | ||
4916 | /* Move iterator IT to a specified buffer or X position within one | |
4917 | line on the display without producing glyphs. | |
4918 | ||
4919 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
4920 | whichever is reached first. | |
4921 | ||
4922 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
4923 | ||
4924 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
4925 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
4926 | TO_X includes the amount by which a window is horizontally | |
4927 | scrolled. | |
4928 | ||
4929 | Value is | |
4930 | ||
4931 | MOVE_POS_MATCH_OR_ZV | |
4932 | - when TO_POS or ZV was reached. | |
4933 | ||
4934 | MOVE_X_REACHED | |
4935 | -when TO_X was reached before TO_POS or ZV were reached. | |
4936 | ||
4937 | MOVE_LINE_CONTINUED | |
4938 | - when we reached the end of the display area and the line must | |
4939 | be continued. | |
4940 | ||
4941 | MOVE_LINE_TRUNCATED | |
4942 | - when we reached the end of the display area and the line is | |
4943 | truncated. | |
4944 | ||
4945 | MOVE_NEWLINE_OR_CR | |
4946 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
4947 | display is on. */ | |
4948 | ||
701552dd | 4949 | static enum move_it_result |
5f5c8ee5 GM |
4950 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
4951 | struct it *it; | |
4952 | int to_charpos, to_x, op; | |
4953 | { | |
4954 | enum move_it_result result = MOVE_UNDEFINED; | |
4955 | struct glyph_row *saved_glyph_row; | |
4956 | ||
4957 | /* Don't produce glyphs in produce_glyphs. */ | |
4958 | saved_glyph_row = it->glyph_row; | |
4959 | it->glyph_row = NULL; | |
4960 | ||
5f5c8ee5 GM |
4961 | while (1) |
4962 | { | |
ae26e27d | 4963 | int x, i, ascent = 0, descent = 0; |
5f5c8ee5 GM |
4964 | |
4965 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4966 | if (!get_next_display_element (it) | |
4967 | || ((op & MOVE_TO_POS) != 0 | |
4968 | && BUFFERP (it->object) | |
4969 | && IT_CHARPOS (*it) >= to_charpos)) | |
4970 | { | |
4971 | result = MOVE_POS_MATCH_OR_ZV; | |
4972 | break; | |
4973 | } | |
4974 | ||
4975 | /* The call to produce_glyphs will get the metrics of the | |
4976 | display element IT is loaded with. We record in x the | |
4977 | x-position before this display element in case it does not | |
4978 | fit on the line. */ | |
4979 | x = it->current_x; | |
47589c8c GM |
4980 | |
4981 | /* Remember the line height so far in case the next element doesn't | |
4982 | fit on the line. */ | |
4983 | if (!it->truncate_lines_p) | |
4984 | { | |
4985 | ascent = it->max_ascent; | |
4986 | descent = it->max_descent; | |
4987 | } | |
4988 | ||
5f5c8ee5 GM |
4989 | PRODUCE_GLYPHS (it); |
4990 | ||
4991 | if (it->area != TEXT_AREA) | |
4992 | { | |
cafafe0b | 4993 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
4994 | continue; |
4995 | } | |
4996 | ||
4997 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4998 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4999 | character on a terminal frame, or (iii) a line end. For the | |
5000 | second case, IT->nglyphs - 1 padding glyphs will be present | |
5001 | (on X frames, there is only one glyph produced for a | |
5002 | composite character. | |
5003 | ||
5004 | The behavior implemented below means, for continuation lines, | |
5005 | that as many spaces of a TAB as fit on the current line are | |
5006 | displayed there. For terminal frames, as many glyphs of a | |
5007 | multi-glyph character are displayed in the current line, too. | |
5008 | This is what the old redisplay code did, and we keep it that | |
5009 | way. Under X, the whole shape of a complex character must | |
5010 | fit on the line or it will be completely displayed in the | |
5011 | next line. | |
5012 | ||
5013 | Note that both for tabs and padding glyphs, all glyphs have | |
5014 | the same width. */ | |
5015 | if (it->nglyphs) | |
5016 | { | |
5017 | /* More than one glyph or glyph doesn't fit on line. All | |
5018 | glyphs have the same width. */ | |
5019 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
5020 | int new_x; | |
5021 | ||
5022 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
5023 | { | |
5024 | new_x = x + single_glyph_width; | |
5025 | ||
5026 | /* We want to leave anything reaching TO_X to the caller. */ | |
5027 | if ((op & MOVE_TO_X) && new_x > to_x) | |
5028 | { | |
5029 | it->current_x = x; | |
5030 | result = MOVE_X_REACHED; | |
5031 | break; | |
5032 | } | |
5033 | else if (/* Lines are continued. */ | |
5034 | !it->truncate_lines_p | |
5035 | && (/* And glyph doesn't fit on the line. */ | |
5036 | new_x > it->last_visible_x | |
5037 | /* Or it fits exactly and we're on a window | |
5038 | system frame. */ | |
5039 | || (new_x == it->last_visible_x | |
5040 | && FRAME_WINDOW_P (it->f)))) | |
5041 | { | |
5042 | if (/* IT->hpos == 0 means the very first glyph | |
5043 | doesn't fit on the line, e.g. a wide image. */ | |
5044 | it->hpos == 0 | |
5045 | || (new_x == it->last_visible_x | |
5046 | && FRAME_WINDOW_P (it->f))) | |
5047 | { | |
5048 | ++it->hpos; | |
5049 | it->current_x = new_x; | |
5050 | if (i == it->nglyphs - 1) | |
cafafe0b | 5051 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5052 | } |
5053 | else | |
47589c8c GM |
5054 | { |
5055 | it->current_x = x; | |
5056 | it->max_ascent = ascent; | |
5057 | it->max_descent = descent; | |
5058 | } | |
5059 | ||
5060 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", | |
5061 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
5062 | result = MOVE_LINE_CONTINUED; |
5063 | break; | |
5064 | } | |
5065 | else if (new_x > it->first_visible_x) | |
5066 | { | |
5067 | /* Glyph is visible. Increment number of glyphs that | |
5068 | would be displayed. */ | |
5069 | ++it->hpos; | |
5070 | } | |
5071 | else | |
5072 | { | |
5073 | /* Glyph is completely off the left margin of the display | |
5074 | area. Nothing to do. */ | |
5075 | } | |
5076 | } | |
5077 | ||
5078 | if (result != MOVE_UNDEFINED) | |
5079 | break; | |
5080 | } | |
5081 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
5082 | { | |
5083 | /* Stop when TO_X specified and reached. This check is | |
5084 | necessary here because of lines consisting of a line end, | |
5085 | only. The line end will not produce any glyphs and we | |
5086 | would never get MOVE_X_REACHED. */ | |
5087 | xassert (it->nglyphs == 0); | |
5088 | result = MOVE_X_REACHED; | |
5089 | break; | |
5090 | } | |
5091 | ||
5092 | /* Is this a line end? If yes, we're done. */ | |
5093 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5094 | { | |
5095 | result = MOVE_NEWLINE_OR_CR; | |
5096 | break; | |
5097 | } | |
5098 | ||
5099 | /* The current display element has been consumed. Advance | |
5100 | to the next. */ | |
cafafe0b | 5101 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5102 | |
5103 | /* Stop if lines are truncated and IT's current x-position is | |
5104 | past the right edge of the window now. */ | |
5105 | if (it->truncate_lines_p | |
5106 | && it->current_x >= it->last_visible_x) | |
5107 | { | |
5108 | result = MOVE_LINE_TRUNCATED; | |
5109 | break; | |
5110 | } | |
5111 | } | |
5112 | ||
5113 | /* Restore the iterator settings altered at the beginning of this | |
5114 | function. */ | |
5115 | it->glyph_row = saved_glyph_row; | |
5116 | return result; | |
5117 | } | |
5118 | ||
5119 | ||
5120 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
5121 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
5122 | the description of enum move_operation_enum. | |
5123 | ||
5124 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
5125 | screen line, this function will set IT to the next position > | |
5126 | TO_CHARPOS. */ | |
5127 | ||
5128 | void | |
5129 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
5130 | struct it *it; | |
5131 | int to_charpos, to_x, to_y, to_vpos; | |
5132 | int op; | |
5133 | { | |
5134 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
5135 | int line_height; | |
47589c8c | 5136 | int reached = 0; |
5f5c8ee5 | 5137 | |
47589c8c | 5138 | for (;;) |
5f5c8ee5 GM |
5139 | { |
5140 | if (op & MOVE_TO_VPOS) | |
5141 | { | |
5142 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
5143 | start of the line TO_VPOS. */ | |
5144 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
5145 | { | |
5146 | if (it->vpos == to_vpos) | |
47589c8c GM |
5147 | { |
5148 | reached = 1; | |
5149 | break; | |
5150 | } | |
5151 | else | |
5152 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
5153 | } |
5154 | else | |
5155 | { | |
5156 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
5157 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
5158 | if (it->vpos == to_vpos) |
5159 | { | |
5160 | reached = 2; | |
5161 | break; | |
5162 | } | |
5163 | ||
5f5c8ee5 GM |
5164 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
5165 | ||
5166 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
5167 | { |
5168 | reached = 3; | |
5169 | break; | |
5170 | } | |
5f5c8ee5 GM |
5171 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
5172 | { | |
5173 | /* We have reached TO_X but not in the line we want. */ | |
5174 | skip = move_it_in_display_line_to (it, to_charpos, | |
5175 | -1, MOVE_TO_POS); | |
5176 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5177 | { |
5178 | reached = 4; | |
5179 | break; | |
5180 | } | |
5f5c8ee5 GM |
5181 | } |
5182 | } | |
5183 | } | |
5184 | else if (op & MOVE_TO_Y) | |
5185 | { | |
5186 | struct it it_backup; | |
5f5c8ee5 GM |
5187 | |
5188 | /* TO_Y specified means stop at TO_X in the line containing | |
5189 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
5190 | problem is that we can't really tell whether the line | |
5191 | contains TO_Y before we have completely scanned it, and | |
5192 | this may skip past TO_X. What we do is to first scan to | |
5193 | TO_X. | |
5194 | ||
5195 | If TO_X is not specified, use a TO_X of zero. The reason | |
5196 | is to make the outcome of this function more predictable. | |
5197 | If we didn't use TO_X == 0, we would stop at the end of | |
5198 | the line which is probably not what a caller would expect | |
5199 | to happen. */ | |
5200 | skip = move_it_in_display_line_to (it, to_charpos, | |
5201 | ((op & MOVE_TO_X) | |
5202 | ? to_x : 0), | |
5203 | (MOVE_TO_X | |
5204 | | (op & MOVE_TO_POS))); | |
5205 | ||
5206 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
5207 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
5208 | { |
5209 | reached = 5; | |
5210 | break; | |
5211 | } | |
5f5c8ee5 GM |
5212 | |
5213 | /* If TO_X was reached, we would like to know whether TO_Y | |
5214 | is in the line. This can only be said if we know the | |
5215 | total line height which requires us to scan the rest of | |
5216 | the line. */ | |
5f5c8ee5 GM |
5217 | if (skip == MOVE_X_REACHED) |
5218 | { | |
5219 | it_backup = *it; | |
47589c8c | 5220 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5221 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
5222 | op & MOVE_TO_POS); | |
47589c8c | 5223 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5224 | } |
5225 | ||
5226 | /* Now, decide whether TO_Y is in this line. */ | |
5227 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 5228 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
5f5c8ee5 GM |
5229 | |
5230 | if (to_y >= it->current_y | |
5231 | && to_y < it->current_y + line_height) | |
5232 | { | |
5233 | if (skip == MOVE_X_REACHED) | |
5234 | /* If TO_Y is in this line and TO_X was reached above, | |
5235 | we scanned too far. We have to restore IT's settings | |
5236 | to the ones before skipping. */ | |
5237 | *it = it_backup; | |
47589c8c | 5238 | reached = 6; |
5f5c8ee5 GM |
5239 | } |
5240 | else if (skip == MOVE_X_REACHED) | |
5241 | { | |
5242 | skip = skip2; | |
5243 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 5244 | reached = 7; |
5f5c8ee5 GM |
5245 | } |
5246 | ||
47589c8c | 5247 | if (reached) |
5f5c8ee5 GM |
5248 | break; |
5249 | } | |
5250 | else | |
5251 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
5252 | ||
5253 | switch (skip) | |
5254 | { | |
5255 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
5256 | reached = 8; |
5257 | goto out; | |
5f5c8ee5 GM |
5258 | |
5259 | case MOVE_NEWLINE_OR_CR: | |
cafafe0b | 5260 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
5261 | it->continuation_lines_width = 0; |
5262 | break; | |
5263 | ||
5264 | case MOVE_LINE_TRUNCATED: | |
5265 | it->continuation_lines_width = 0; | |
312246d1 | 5266 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
5267 | if ((op & MOVE_TO_POS) != 0 |
5268 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
5269 | { |
5270 | reached = 9; | |
5271 | goto out; | |
5272 | } | |
5f5c8ee5 GM |
5273 | break; |
5274 | ||
5275 | case MOVE_LINE_CONTINUED: | |
5276 | it->continuation_lines_width += it->current_x; | |
5277 | break; | |
5278 | ||
5279 | default: | |
5280 | abort (); | |
5281 | } | |
5282 | ||
5283 | /* Reset/increment for the next run. */ | |
5284 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
5285 | it->current_x = it->hpos = 0; | |
5286 | it->current_y += it->max_ascent + it->max_descent; | |
5287 | ++it->vpos; | |
5288 | last_height = it->max_ascent + it->max_descent; | |
5289 | last_max_ascent = it->max_ascent; | |
5290 | it->max_ascent = it->max_descent = 0; | |
5291 | } | |
47589c8c GM |
5292 | |
5293 | out: | |
5294 | ||
5295 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
5296 | } |
5297 | ||
5298 | ||
5299 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
5300 | ||
5301 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
5302 | means move IT backward to the preceding line start or BEGV. This | |
5303 | function may move over more than DY pixels if IT->current_y - DY | |
5304 | ends up in the middle of a line; in this case IT->current_y will be | |
5305 | set to the top of the line moved to. */ | |
5306 | ||
5307 | void | |
5308 | move_it_vertically_backward (it, dy) | |
5309 | struct it *it; | |
5310 | int dy; | |
5311 | { | |
79ddf6f7 GM |
5312 | int nlines, h; |
5313 | struct it it2, it3; | |
5f5c8ee5 GM |
5314 | int start_pos = IT_CHARPOS (*it); |
5315 | ||
5316 | xassert (dy >= 0); | |
5317 | ||
5318 | /* Estimate how many newlines we must move back. */ | |
5319 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
5320 | ||
5321 | /* Set the iterator's position that many lines back. */ | |
5322 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
5323 | back_to_previous_visible_line_start (it); | |
5324 | ||
5325 | /* Reseat the iterator here. When moving backward, we don't want | |
5326 | reseat to skip forward over invisible text, set up the iterator | |
5327 | to deliver from overlay strings at the new position etc. So, | |
5328 | use reseat_1 here. */ | |
5329 | reseat_1 (it, it->current.pos, 1); | |
5330 | ||
5331 | /* We are now surely at a line start. */ | |
5332 | it->current_x = it->hpos = 0; | |
5333 | ||
5334 | /* Move forward and see what y-distance we moved. First move to the | |
5335 | start of the next line so that we get its height. We need this | |
5336 | height to be able to tell whether we reached the specified | |
5337 | y-distance. */ | |
5338 | it2 = *it; | |
5339 | it2.max_ascent = it2.max_descent = 0; | |
5340 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
5341 | MOVE_TO_POS | MOVE_TO_VPOS); | |
5342 | xassert (IT_CHARPOS (*it) >= BEGV); | |
79ddf6f7 | 5343 | it3 = it2; |
47589c8c | 5344 | |
5f5c8ee5 GM |
5345 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
5346 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5347 | h = it2.current_y - it->current_y; | |
5348 | nlines = it2.vpos - it->vpos; | |
5349 | ||
5350 | /* Correct IT's y and vpos position. */ | |
5351 | it->vpos -= nlines; | |
5352 | it->current_y -= h; | |
5353 | ||
5354 | if (dy == 0) | |
5355 | { | |
5356 | /* DY == 0 means move to the start of the screen line. The | |
5357 | value of nlines is > 0 if continuation lines were involved. */ | |
5358 | if (nlines > 0) | |
5359 | move_it_by_lines (it, nlines, 1); | |
5360 | xassert (IT_CHARPOS (*it) <= start_pos); | |
5361 | } | |
5362 | else if (nlines) | |
5363 | { | |
5364 | /* The y-position we try to reach. Note that h has been | |
5365 | subtracted in front of the if-statement. */ | |
5366 | int target_y = it->current_y + h - dy; | |
79ddf6f7 GM |
5367 | int y0 = it3.current_y; |
5368 | int y1 = line_bottom_y (&it3); | |
5369 | int line_height = y1 - y0; | |
5370 | ||
5f5c8ee5 GM |
5371 | /* If we did not reach target_y, try to move further backward if |
5372 | we can. If we moved too far backward, try to move forward. */ | |
5373 | if (target_y < it->current_y | |
79ddf6f7 GM |
5374 | /* This is heuristic. In a window that's 3 lines high, with |
5375 | a line height of 13 pixels each, recentering with point | |
5376 | on the bottom line will try to move -39/2 = 19 pixels | |
5377 | backward. Try to avoid moving into the first line. */ | |
798dbe1f | 5378 | && it->current_y - target_y > line_height / 3 * 2 |
5f5c8ee5 GM |
5379 | && IT_CHARPOS (*it) > BEGV) |
5380 | { | |
5381 | move_it_vertically (it, target_y - it->current_y); | |
5382 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5383 | } | |
5384 | else if (target_y >= it->current_y + line_height | |
5385 | && IT_CHARPOS (*it) < ZV) | |
5386 | { | |
5387 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
5388 | xassert (IT_CHARPOS (*it) >= BEGV); | |
5389 | } | |
5390 | } | |
5391 | } | |
5392 | ||
5393 | ||
5394 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
5395 | move backwards. DY = 0 means move to start of screen line. At the | |
5396 | end, IT will be on the start of a screen line. */ | |
5397 | ||
5398 | void | |
5399 | move_it_vertically (it, dy) | |
5400 | struct it *it; | |
5401 | int dy; | |
5402 | { | |
5403 | if (dy <= 0) | |
5404 | move_it_vertically_backward (it, -dy); | |
5405 | else if (dy > 0) | |
5406 | { | |
47589c8c | 5407 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
5408 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
5409 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 5410 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
5411 | |
5412 | /* If buffer ends in ZV without a newline, move to the start of | |
5413 | the line to satisfy the post-condition. */ | |
5414 | if (IT_CHARPOS (*it) == ZV | |
5415 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
5416 | move_it_by_lines (it, 0, 0); | |
5417 | } | |
5418 | } | |
5419 | ||
5420 | ||
47fc2c10 GM |
5421 | /* Move iterator IT past the end of the text line it is in. */ |
5422 | ||
5423 | void | |
5424 | move_it_past_eol (it) | |
5425 | struct it *it; | |
5426 | { | |
5427 | enum move_it_result rc; | |
5428 | ||
5429 | rc = move_it_in_display_line_to (it, Z, 0, MOVE_TO_POS); | |
5430 | if (rc == MOVE_NEWLINE_OR_CR) | |
5431 | set_iterator_to_next (it, 0); | |
5432 | } | |
5433 | ||
5434 | ||
2c79b732 GM |
5435 | #if 0 /* Currently not used. */ |
5436 | ||
5f5c8ee5 GM |
5437 | /* Return non-zero if some text between buffer positions START_CHARPOS |
5438 | and END_CHARPOS is invisible. IT->window is the window for text | |
5439 | property lookup. */ | |
5440 | ||
5441 | static int | |
5442 | invisible_text_between_p (it, start_charpos, end_charpos) | |
5443 | struct it *it; | |
5444 | int start_charpos, end_charpos; | |
5445 | { | |
5f5c8ee5 GM |
5446 | Lisp_Object prop, limit; |
5447 | int invisible_found_p; | |
5448 | ||
5449 | xassert (it != NULL && start_charpos <= end_charpos); | |
5450 | ||
5451 | /* Is text at START invisible? */ | |
5452 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
5453 | it->window); | |
5454 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
5455 | invisible_found_p = 1; | |
5456 | else | |
5457 | { | |
016b5642 MB |
5458 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
5459 | Qinvisible, Qnil, | |
5460 | make_number (end_charpos)); | |
5f5c8ee5 GM |
5461 | invisible_found_p = XFASTINT (limit) < end_charpos; |
5462 | } | |
5463 | ||
5464 | return invisible_found_p; | |
5f5c8ee5 GM |
5465 | } |
5466 | ||
2c79b732 GM |
5467 | #endif /* 0 */ |
5468 | ||
5f5c8ee5 GM |
5469 | |
5470 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
5471 | negative means move up. DVPOS == 0 means move to the start of the | |
5472 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
5473 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
5474 | ||
5475 | Further optimization ideas: If we would know that IT->f doesn't use | |
5476 | a face with proportional font, we could be faster for | |
5477 | truncate-lines nil. */ | |
5478 | ||
5479 | void | |
5480 | move_it_by_lines (it, dvpos, need_y_p) | |
5481 | struct it *it; | |
5482 | int dvpos, need_y_p; | |
5483 | { | |
5484 | struct position pos; | |
5485 | ||
5486 | if (!FRAME_WINDOW_P (it->f)) | |
5487 | { | |
5488 | struct text_pos textpos; | |
5489 | ||
5490 | /* We can use vmotion on frames without proportional fonts. */ | |
5491 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
5492 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
5493 | reseat (it, textpos, 1); | |
5494 | it->vpos += pos.vpos; | |
5495 | it->current_y += pos.vpos; | |
5496 | } | |
5497 | else if (dvpos == 0) | |
5498 | { | |
5499 | /* DVPOS == 0 means move to the start of the screen line. */ | |
5500 | move_it_vertically_backward (it, 0); | |
5501 | xassert (it->current_x == 0 && it->hpos == 0); | |
5502 | } | |
5503 | else if (dvpos > 0) | |
2c79b732 | 5504 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); |
5f5c8ee5 GM |
5505 | else |
5506 | { | |
5507 | struct it it2; | |
5508 | int start_charpos, i; | |
2c79b732 | 5509 | |
e8660d73 GM |
5510 | /* Start at the beginning of the screen line containing IT's |
5511 | position. */ | |
5512 | move_it_vertically_backward (it, 0); | |
b0e619b4 | 5513 | |
5f5c8ee5 GM |
5514 | /* Go back -DVPOS visible lines and reseat the iterator there. */ |
5515 | start_charpos = IT_CHARPOS (*it); | |
5516 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
5517 | back_to_previous_visible_line_start (it); | |
5518 | reseat (it, it->current.pos, 1); | |
5519 | it->current_x = it->hpos = 0; | |
5520 | ||
5521 | /* Above call may have moved too far if continuation lines | |
5522 | are involved. Scan forward and see if it did. */ | |
5523 | it2 = *it; | |
5524 | it2.vpos = it2.current_y = 0; | |
5525 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
5526 | it->vpos -= it2.vpos; | |
5527 | it->current_y -= it2.current_y; | |
5528 | it->current_x = it->hpos = 0; | |
5529 | ||
5530 | /* If we moved too far, move IT some lines forward. */ | |
5531 | if (it2.vpos > -dvpos) | |
5532 | { | |
5533 | int delta = it2.vpos + dvpos; | |
5534 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
5535 | } | |
5536 | } | |
5537 | } | |
5538 | ||
5539 | ||
5540 | \f | |
5541 | /*********************************************************************** | |
5542 | Messages | |
5543 | ***********************************************************************/ | |
5544 | ||
5545 | ||
937248bc GM |
5546 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
5547 | to *Messages*. */ | |
5548 | ||
5549 | void | |
5550 | add_to_log (format, arg1, arg2) | |
5551 | char *format; | |
5552 | Lisp_Object arg1, arg2; | |
5553 | { | |
5554 | Lisp_Object args[3]; | |
5555 | Lisp_Object msg, fmt; | |
5556 | char *buffer; | |
5557 | int len; | |
5558 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5559 | ||
ae794295 GM |
5560 | /* Do nothing if called asynchronously. Inserting text into |
5561 | a buffer may call after-change-functions and alike and | |
5562 | that would means running Lisp asynchronously. */ | |
5563 | if (handling_signal) | |
5564 | return; | |
5565 | ||
937248bc GM |
5566 | fmt = msg = Qnil; |
5567 | GCPRO4 (fmt, msg, arg1, arg2); | |
5568 | ||
5569 | args[0] = fmt = build_string (format); | |
5570 | args[1] = arg1; | |
5571 | args[2] = arg2; | |
6fc556fd | 5572 | msg = Fformat (3, args); |
937248bc GM |
5573 | |
5574 | len = STRING_BYTES (XSTRING (msg)) + 1; | |
5575 | buffer = (char *) alloca (len); | |
1e1e5daf | 5576 | bcopy (XSTRING (msg)->data, buffer, len); |
937248bc | 5577 | |
796184bc | 5578 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
5579 | UNGCPRO; |
5580 | } | |
5581 | ||
5582 | ||
5f5c8ee5 GM |
5583 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
5584 | ||
5585 | void | |
5586 | message_log_maybe_newline () | |
5587 | { | |
5588 | if (message_log_need_newline) | |
5589 | message_dolog ("", 0, 1, 0); | |
5590 | } | |
5591 | ||
5592 | ||
1e313f28 | 5593 | /* Add a string M of length NBYTES to the message log, optionally |
5f5c8ee5 GM |
5594 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if |
5595 | nonzero, means interpret the contents of M as multibyte. This | |
5596 | function calls low-level routines in order to bypass text property | |
5597 | hooks, etc. which might not be safe to run. */ | |
5598 | ||
5599 | void | |
1e313f28 | 5600 | message_dolog (m, nbytes, nlflag, multibyte) |
5f5c8ee5 | 5601 | char *m; |
1e313f28 | 5602 | int nbytes, nlflag, multibyte; |
5f5c8ee5 GM |
5603 | { |
5604 | if (!NILP (Vmessage_log_max)) | |
5605 | { | |
5606 | struct buffer *oldbuf; | |
5607 | Lisp_Object oldpoint, oldbegv, oldzv; | |
5608 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
5609 | int point_at_end = 0; | |
5610 | int zv_at_end = 0; | |
5611 | Lisp_Object old_deactivate_mark, tem; | |
5612 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5613 | ||
5614 | old_deactivate_mark = Vdeactivate_mark; | |
5615 | oldbuf = current_buffer; | |
6a94510a | 5616 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
5617 | current_buffer->undo_list = Qt; |
5618 | ||
5619 | oldpoint = Fpoint_marker (); | |
5620 | oldbegv = Fpoint_min_marker (); | |
5621 | oldzv = Fpoint_max_marker (); | |
5622 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
5623 | ||
5624 | if (PT == Z) | |
5625 | point_at_end = 1; | |
5626 | if (ZV == Z) | |
5627 | zv_at_end = 1; | |
5628 | ||
5629 | BEGV = BEG; | |
5630 | BEGV_BYTE = BEG_BYTE; | |
5631 | ZV = Z; | |
5632 | ZV_BYTE = Z_BYTE; | |
5633 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5634 | ||
5635 | /* Insert the string--maybe converting multibyte to single byte | |
5636 | or vice versa, so that all the text fits the buffer. */ | |
5637 | if (multibyte | |
5638 | && NILP (current_buffer->enable_multibyte_characters)) | |
5639 | { | |
1e313f28 | 5640 | int i, c, char_bytes; |
5f5c8ee5 GM |
5641 | unsigned char work[1]; |
5642 | ||
5643 | /* Convert a multibyte string to single-byte | |
5644 | for the *Message* buffer. */ | |
1e313f28 | 5645 | for (i = 0; i < nbytes; i += nbytes) |
5f5c8ee5 | 5646 | { |
1e313f28 | 5647 | c = string_char_and_length (m + i, nbytes - i, &char_bytes); |
5f5c8ee5 GM |
5648 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
5649 | ? c | |
5650 | : multibyte_char_to_unibyte (c, Qnil)); | |
5651 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5652 | } | |
5653 | } | |
5654 | else if (! multibyte | |
5655 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
5656 | { | |
1e313f28 | 5657 | int i, c, char_bytes; |
5f5c8ee5 | 5658 | unsigned char *msg = (unsigned char *) m; |
260a86a0 | 5659 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
5660 | /* Convert a single-byte string to multibyte |
5661 | for the *Message* buffer. */ | |
1e313f28 | 5662 | for (i = 0; i < nbytes; i++) |
5f5c8ee5 GM |
5663 | { |
5664 | c = unibyte_char_to_multibyte (msg[i]); | |
1e313f28 GM |
5665 | char_bytes = CHAR_STRING (c, str); |
5666 | insert_1_both (str, 1, char_bytes, 1, 0, 0); | |
5f5c8ee5 GM |
5667 | } |
5668 | } | |
1e313f28 GM |
5669 | else if (nbytes) |
5670 | insert_1 (m, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
5671 | |
5672 | if (nlflag) | |
5673 | { | |
5674 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
5675 | insert_1 ("\n", 1, 1, 0, 0); | |
5676 | ||
5677 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
5678 | this_bol = PT; | |
5679 | this_bol_byte = PT_BYTE; | |
5680 | ||
5681 | if (this_bol > BEG) | |
5682 | { | |
5683 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
5684 | prev_bol = PT; | |
5685 | prev_bol_byte = PT_BYTE; | |
5686 | ||
5687 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
5688 | this_bol, this_bol_byte); | |
5689 | if (dup) | |
5690 | { | |
5691 | del_range_both (prev_bol, prev_bol_byte, | |
5692 | this_bol, this_bol_byte, 0); | |
5693 | if (dup > 1) | |
5694 | { | |
5695 | char dupstr[40]; | |
5696 | int duplen; | |
5697 | ||
5698 | /* If you change this format, don't forget to also | |
5699 | change message_log_check_duplicate. */ | |
5700 | sprintf (dupstr, " [%d times]", dup); | |
5701 | duplen = strlen (dupstr); | |
5702 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
5703 | insert_1 (dupstr, duplen, 1, 0, 1); | |
5704 | } | |
5705 | } | |
5706 | } | |
5707 | ||
5708 | if (NATNUMP (Vmessage_log_max)) | |
5709 | { | |
5710 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
5711 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
5712 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
5713 | } | |
5714 | } | |
5715 | BEGV = XMARKER (oldbegv)->charpos; | |
5716 | BEGV_BYTE = marker_byte_position (oldbegv); | |
5717 | ||
5718 | if (zv_at_end) | |
5719 | { | |
5720 | ZV = Z; | |
5721 | ZV_BYTE = Z_BYTE; | |
5722 | } | |
5723 | else | |
5724 | { | |
5725 | ZV = XMARKER (oldzv)->charpos; | |
5726 | ZV_BYTE = marker_byte_position (oldzv); | |
5727 | } | |
5728 | ||
5729 | if (point_at_end) | |
5730 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5731 | else | |
5732 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
5733 | Lisp code. */ | |
5734 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
5735 | XMARKER (oldpoint)->bytepos); | |
5736 | ||
5737 | UNGCPRO; | |
5738 | free_marker (oldpoint); | |
5739 | free_marker (oldbegv); | |
5740 | free_marker (oldzv); | |
5741 | ||
5742 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
5743 | set_buffer_internal (oldbuf); | |
5744 | if (NILP (tem)) | |
5745 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
5746 | message_log_need_newline = !nlflag; | |
5747 | Vdeactivate_mark = old_deactivate_mark; | |
5748 | } | |
5749 | } | |
5750 | ||
5751 | ||
5752 | /* We are at the end of the buffer after just having inserted a newline. | |
5753 | (Note: We depend on the fact we won't be crossing the gap.) | |
5754 | Check to see if the most recent message looks a lot like the previous one. | |
5755 | Return 0 if different, 1 if the new one should just replace it, or a | |
5756 | value N > 1 if we should also append " [N times]". */ | |
5757 | ||
5758 | static int | |
5759 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
5760 | int prev_bol, this_bol; | |
5761 | int prev_bol_byte, this_bol_byte; | |
5762 | { | |
5763 | int i; | |
5764 | int len = Z_BYTE - 1 - this_bol_byte; | |
5765 | int seen_dots = 0; | |
5766 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
5767 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
5768 | ||
5769 | for (i = 0; i < len; i++) | |
5770 | { | |
509633e3 | 5771 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.') |
5f5c8ee5 GM |
5772 | seen_dots = 1; |
5773 | if (p1[i] != p2[i]) | |
5774 | return seen_dots; | |
5775 | } | |
5776 | p1 += len; | |
5777 | if (*p1 == '\n') | |
5778 | return 2; | |
5779 | if (*p1++ == ' ' && *p1++ == '[') | |
5780 | { | |
5781 | int n = 0; | |
5782 | while (*p1 >= '0' && *p1 <= '9') | |
5783 | n = n * 10 + *p1++ - '0'; | |
5784 | if (strncmp (p1, " times]\n", 8) == 0) | |
5785 | return n+1; | |
5786 | } | |
5787 | return 0; | |
5788 | } | |
5789 | ||
5790 | ||
1e313f28 GM |
5791 | /* Display an echo area message M with a specified length of NBYTES |
5792 | bytes. The string may include null characters. If M is 0, clear | |
5793 | out any existing message, and let the mini-buffer text show | |
5794 | through. | |
5f5c8ee5 GM |
5795 | |
5796 | The buffer M must continue to exist until after the echo area gets | |
5797 | cleared or some other message gets displayed there. This means do | |
5798 | not pass text that is stored in a Lisp string; do not pass text in | |
5799 | a buffer that was alloca'd. */ | |
5800 | ||
5801 | void | |
1e313f28 | 5802 | message2 (m, nbytes, multibyte) |
5f5c8ee5 | 5803 | char *m; |
1e313f28 | 5804 | int nbytes; |
5f5c8ee5 GM |
5805 | int multibyte; |
5806 | { | |
5807 | /* First flush out any partial line written with print. */ | |
5808 | message_log_maybe_newline (); | |
5809 | if (m) | |
1e313f28 GM |
5810 | message_dolog (m, nbytes, 1, multibyte); |
5811 | message2_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5812 | } |
5813 | ||
5814 | ||
5815 | /* The non-logging counterpart of message2. */ | |
5816 | ||
5817 | void | |
1e313f28 | 5818 | message2_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5819 | char *m; |
1e313f28 | 5820 | int nbytes; |
5f5c8ee5 | 5821 | { |
886bd6f2 | 5822 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5823 | message_enable_multibyte = multibyte; |
5824 | ||
5825 | if (noninteractive) | |
5826 | { | |
5827 | if (noninteractive_need_newline) | |
5828 | putc ('\n', stderr); | |
5829 | noninteractive_need_newline = 0; | |
5830 | if (m) | |
1e313f28 | 5831 | fwrite (m, nbytes, 1, stderr); |
5f5c8ee5 GM |
5832 | if (cursor_in_echo_area == 0) |
5833 | fprintf (stderr, "\n"); | |
5834 | fflush (stderr); | |
5835 | } | |
5836 | /* A null message buffer means that the frame hasn't really been | |
5837 | initialized yet. Error messages get reported properly by | |
5838 | cmd_error, so this must be just an informative message; toss it. */ | |
5839 | else if (INTERACTIVE | |
886bd6f2 GM |
5840 | && sf->glyphs_initialized_p |
5841 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5842 | { |
5843 | Lisp_Object mini_window; | |
5844 | struct frame *f; | |
5845 | ||
5846 | /* Get the frame containing the mini-buffer | |
5847 | that the selected frame is using. */ | |
886bd6f2 | 5848 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5849 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5850 | ||
5851 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5852 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
5853 | && ! FRAME_VISIBLE_P (f)) |
5854 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
5855 | ||
5856 | if (m) | |
5857 | { | |
1e313f28 | 5858 | set_message (m, Qnil, nbytes, multibyte); |
5f5c8ee5 GM |
5859 | if (minibuffer_auto_raise) |
5860 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5861 | } | |
5862 | else | |
c6e89d6c | 5863 | clear_message (1, 1); |
5f5c8ee5 | 5864 | |
c6e89d6c | 5865 | do_pending_window_change (0); |
5f5c8ee5 | 5866 | echo_area_display (1); |
c6e89d6c | 5867 | do_pending_window_change (0); |
5f5c8ee5 GM |
5868 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5869 | (*frame_up_to_date_hook) (f); | |
5870 | } | |
5871 | } | |
5872 | ||
5873 | ||
c6e89d6c GM |
5874 | /* Display an echo area message M with a specified length of NBYTES |
5875 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
5876 | string, clear out any existing message, and let the mini-buffer |
5877 | text show through. */ | |
5878 | ||
5879 | void | |
c6e89d6c | 5880 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 5881 | Lisp_Object m; |
c6e89d6c | 5882 | int nbytes; |
5f5c8ee5 GM |
5883 | int multibyte; |
5884 | { | |
5885 | struct gcpro gcpro1; | |
5886 | ||
5887 | GCPRO1 (m); | |
5888 | ||
5889 | /* First flush out any partial line written with print. */ | |
5890 | message_log_maybe_newline (); | |
5891 | if (STRINGP (m)) | |
c6e89d6c GM |
5892 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
5893 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5894 | |
5895 | UNGCPRO; | |
5896 | } | |
5897 | ||
5898 | ||
5899 | /* The non-logging version of message3. */ | |
5900 | ||
5901 | void | |
c6e89d6c | 5902 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5903 | Lisp_Object m; |
c6e89d6c | 5904 | int nbytes, multibyte; |
5f5c8ee5 | 5905 | { |
886bd6f2 | 5906 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5907 | message_enable_multibyte = multibyte; |
5908 | ||
5909 | if (noninteractive) | |
5910 | { | |
5911 | if (noninteractive_need_newline) | |
5912 | putc ('\n', stderr); | |
5913 | noninteractive_need_newline = 0; | |
5914 | if (STRINGP (m)) | |
c6e89d6c | 5915 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
5916 | if (cursor_in_echo_area == 0) |
5917 | fprintf (stderr, "\n"); | |
5918 | fflush (stderr); | |
5919 | } | |
5920 | /* A null message buffer means that the frame hasn't really been | |
5921 | initialized yet. Error messages get reported properly by | |
5922 | cmd_error, so this must be just an informative message; toss it. */ | |
5923 | else if (INTERACTIVE | |
886bd6f2 GM |
5924 | && sf->glyphs_initialized_p |
5925 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5926 | { |
5927 | Lisp_Object mini_window; | |
c6e89d6c | 5928 | Lisp_Object frame; |
5f5c8ee5 GM |
5929 | struct frame *f; |
5930 | ||
5931 | /* Get the frame containing the mini-buffer | |
5932 | that the selected frame is using. */ | |
886bd6f2 | 5933 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5934 | frame = XWINDOW (mini_window)->frame; |
5935 | f = XFRAME (frame); | |
5f5c8ee5 GM |
5936 | |
5937 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5938 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
5939 | && !FRAME_VISIBLE_P (f)) |
5940 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 5941 | |
c6e89d6c | 5942 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 5943 | { |
c6e89d6c | 5944 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
5945 | if (minibuffer_auto_raise) |
5946 | Fraise_frame (frame); | |
5f5c8ee5 GM |
5947 | } |
5948 | else | |
c6e89d6c | 5949 | clear_message (1, 1); |
5f5c8ee5 | 5950 | |
c6e89d6c | 5951 | do_pending_window_change (0); |
5f5c8ee5 | 5952 | echo_area_display (1); |
c6e89d6c | 5953 | do_pending_window_change (0); |
5f5c8ee5 GM |
5954 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5955 | (*frame_up_to_date_hook) (f); | |
5956 | } | |
5957 | } | |
5958 | ||
5959 | ||
5960 | /* Display a null-terminated echo area message M. If M is 0, clear | |
5961 | out any existing message, and let the mini-buffer text show through. | |
5962 | ||
5963 | The buffer M must continue to exist until after the echo area gets | |
5964 | cleared or some other message gets displayed there. Do not pass | |
5965 | text that is stored in a Lisp string. Do not pass text in a buffer | |
5966 | that was alloca'd. */ | |
5967 | ||
5968 | void | |
5969 | message1 (m) | |
5970 | char *m; | |
5971 | { | |
5972 | message2 (m, (m ? strlen (m) : 0), 0); | |
5973 | } | |
5974 | ||
5975 | ||
5976 | /* The non-logging counterpart of message1. */ | |
5977 | ||
5978 | void | |
5979 | message1_nolog (m) | |
5980 | char *m; | |
5981 | { | |
5982 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5983 | } | |
5984 | ||
5985 | /* Display a message M which contains a single %s | |
5986 | which gets replaced with STRING. */ | |
5987 | ||
5988 | void | |
5989 | message_with_string (m, string, log) | |
5990 | char *m; | |
5991 | Lisp_Object string; | |
5992 | int log; | |
5993 | { | |
5994 | if (noninteractive) | |
5995 | { | |
5996 | if (m) | |
5997 | { | |
5998 | if (noninteractive_need_newline) | |
5999 | putc ('\n', stderr); | |
6000 | noninteractive_need_newline = 0; | |
6001 | fprintf (stderr, m, XSTRING (string)->data); | |
6002 | if (cursor_in_echo_area == 0) | |
6003 | fprintf (stderr, "\n"); | |
6004 | fflush (stderr); | |
6005 | } | |
6006 | } | |
6007 | else if (INTERACTIVE) | |
6008 | { | |
6009 | /* The frame whose minibuffer we're going to display the message on. | |
6010 | It may be larger than the selected frame, so we need | |
6011 | to use its buffer, not the selected frame's buffer. */ | |
6012 | Lisp_Object mini_window; | |
886bd6f2 | 6013 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6014 | |
6015 | /* Get the frame containing the minibuffer | |
6016 | that the selected frame is using. */ | |
886bd6f2 | 6017 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6018 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6019 | ||
6020 | /* A null message buffer means that the frame hasn't really been | |
6021 | initialized yet. Error messages get reported properly by | |
6022 | cmd_error, so this must be just an informative message; toss it. */ | |
6023 | if (FRAME_MESSAGE_BUF (f)) | |
6024 | { | |
6025 | int len; | |
6026 | char *a[1]; | |
6027 | a[0] = (char *) XSTRING (string)->data; | |
6028 | ||
6029 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6030 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6031 | ||
6032 | if (log) | |
6033 | message2 (FRAME_MESSAGE_BUF (f), len, | |
6034 | STRING_MULTIBYTE (string)); | |
6035 | else | |
6036 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
6037 | STRING_MULTIBYTE (string)); | |
6038 | ||
6039 | /* Print should start at the beginning of the message | |
6040 | buffer next time. */ | |
6041 | message_buf_print = 0; | |
6042 | } | |
6043 | } | |
6044 | } | |
6045 | ||
6046 | ||
5f5c8ee5 GM |
6047 | /* Dump an informative message to the minibuf. If M is 0, clear out |
6048 | any existing message, and let the mini-buffer text show through. */ | |
6049 | ||
6050 | /* VARARGS 1 */ | |
6051 | void | |
6052 | message (m, a1, a2, a3) | |
6053 | char *m; | |
6054 | EMACS_INT a1, a2, a3; | |
6055 | { | |
6056 | if (noninteractive) | |
6057 | { | |
6058 | if (m) | |
6059 | { | |
6060 | if (noninteractive_need_newline) | |
6061 | putc ('\n', stderr); | |
6062 | noninteractive_need_newline = 0; | |
6063 | fprintf (stderr, m, a1, a2, a3); | |
6064 | if (cursor_in_echo_area == 0) | |
6065 | fprintf (stderr, "\n"); | |
6066 | fflush (stderr); | |
6067 | } | |
6068 | } | |
6069 | else if (INTERACTIVE) | |
6070 | { | |
6071 | /* The frame whose mini-buffer we're going to display the message | |
6072 | on. It may be larger than the selected frame, so we need to | |
6073 | use its buffer, not the selected frame's buffer. */ | |
6074 | Lisp_Object mini_window; | |
886bd6f2 | 6075 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
6076 | |
6077 | /* Get the frame containing the mini-buffer | |
6078 | that the selected frame is using. */ | |
886bd6f2 | 6079 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
6080 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
6081 | ||
6082 | /* A null message buffer means that the frame hasn't really been | |
6083 | initialized yet. Error messages get reported properly by | |
6084 | cmd_error, so this must be just an informative message; toss | |
6085 | it. */ | |
6086 | if (FRAME_MESSAGE_BUF (f)) | |
6087 | { | |
6088 | if (m) | |
6089 | { | |
6090 | int len; | |
6091 | #ifdef NO_ARG_ARRAY | |
6092 | char *a[3]; | |
6093 | a[0] = (char *) a1; | |
6094 | a[1] = (char *) a2; | |
6095 | a[2] = (char *) a3; | |
6096 | ||
6097 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6098 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
6099 | #else | |
6100 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
6101 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
6102 | (char **) &a1); | |
6103 | #endif /* NO_ARG_ARRAY */ | |
6104 | ||
6105 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
6106 | } | |
6107 | else | |
6108 | message1 (0); | |
6109 | ||
6110 | /* Print should start at the beginning of the message | |
6111 | buffer next time. */ | |
6112 | message_buf_print = 0; | |
6113 | } | |
6114 | } | |
6115 | } | |
6116 | ||
6117 | ||
6118 | /* The non-logging version of message. */ | |
6119 | ||
6120 | void | |
6121 | message_nolog (m, a1, a2, a3) | |
6122 | char *m; | |
6123 | EMACS_INT a1, a2, a3; | |
6124 | { | |
6125 | Lisp_Object old_log_max; | |
6126 | old_log_max = Vmessage_log_max; | |
6127 | Vmessage_log_max = Qnil; | |
6128 | message (m, a1, a2, a3); | |
6129 | Vmessage_log_max = old_log_max; | |
6130 | } | |
6131 | ||
6132 | ||
c6e89d6c GM |
6133 | /* Display the current message in the current mini-buffer. This is |
6134 | only called from error handlers in process.c, and is not time | |
6135 | critical. */ | |
5f5c8ee5 GM |
6136 | |
6137 | void | |
6138 | update_echo_area () | |
6139 | { | |
c6e89d6c GM |
6140 | if (!NILP (echo_area_buffer[0])) |
6141 | { | |
6142 | Lisp_Object string; | |
6143 | string = Fcurrent_message (); | |
6144 | message3 (string, XSTRING (string)->size, | |
6145 | !NILP (current_buffer->enable_multibyte_characters)); | |
6146 | } | |
6147 | } | |
6148 | ||
6149 | ||
5bcfeb49 GM |
6150 | /* Make sure echo area buffers in echo_buffers[] are life. If they |
6151 | aren't, make new ones. */ | |
6152 | ||
6153 | static void | |
6154 | ensure_echo_area_buffers () | |
6155 | { | |
6156 | int i; | |
6157 | ||
6158 | for (i = 0; i < 2; ++i) | |
6159 | if (!BUFFERP (echo_buffer[i]) | |
6160 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
6161 | { | |
6162 | char name[30]; | |
ff3d9573 GM |
6163 | Lisp_Object old_buffer; |
6164 | int j; | |
6165 | ||
6166 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
6167 | sprintf (name, " *Echo Area %d*", i); |
6168 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 6169 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
6170 | |
6171 | for (j = 0; j < 2; ++j) | |
6172 | if (EQ (old_buffer, echo_area_buffer[j])) | |
6173 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
6174 | } |
6175 | } | |
6176 | ||
6177 | ||
23a96c77 | 6178 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
6179 | echo_area_buffer as current buffer. |
6180 | ||
6181 | WHICH zero means use the current message buffer | |
6182 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
6183 | from echo_buffer[] and clear it. | |
6184 | ||
6185 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
6186 | suitable buffer from echo_buffer[] and clear it. | |
6187 | ||
6188 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
6189 | that the current message becomes the last displayed one, make | |
6190 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
6191 | ||
6192 | Value is what FN returns. */ | |
6193 | ||
6194 | static int | |
23a96c77 | 6195 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
6196 | struct window *w; |
6197 | int which; | |
23dd2d97 KR |
6198 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
6199 | EMACS_INT a1; | |
6200 | Lisp_Object a2; | |
6201 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6202 | { |
6203 | Lisp_Object buffer; | |
15e26c76 | 6204 | int this_one, the_other, clear_buffer_p, rc; |
2d27dae2 | 6205 | int count = BINDING_STACK_SIZE (); |
c6e89d6c GM |
6206 | |
6207 | /* If buffers aren't life, make new ones. */ | |
5bcfeb49 | 6208 | ensure_echo_area_buffers (); |
c6e89d6c GM |
6209 | |
6210 | clear_buffer_p = 0; | |
6211 | ||
6212 | if (which == 0) | |
6213 | this_one = 0, the_other = 1; | |
6214 | else if (which > 0) | |
6215 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 6216 | else |
c6e89d6c GM |
6217 | { |
6218 | this_one = 0, the_other = 1; | |
6219 | clear_buffer_p = 1; | |
6220 | ||
6221 | /* We need a fresh one in case the current echo buffer equals | |
6222 | the one containing the last displayed echo area message. */ | |
6223 | if (!NILP (echo_area_buffer[this_one]) | |
6224 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
6225 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
6226 | } |
6227 | ||
6228 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
6229 | have one. */ | |
6230 | if (NILP (echo_area_buffer[this_one])) | |
6231 | { | |
6232 | echo_area_buffer[this_one] | |
6233 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
6234 | ? echo_buffer[the_other] | |
6235 | : echo_buffer[this_one]); | |
6236 | clear_buffer_p = 1; | |
6237 | } | |
6238 | ||
6239 | buffer = echo_area_buffer[this_one]; | |
6240 | ||
1013f4e3 GM |
6241 | /* Don't get confused by reusing the buffer used for echoing |
6242 | for a different purpose. */ | |
032906b1 | 6243 | if (echo_kboard == NULL && EQ (buffer, echo_message_buffer)) |
1013f4e3 GM |
6244 | cancel_echoing (); |
6245 | ||
c6e89d6c GM |
6246 | record_unwind_protect (unwind_with_echo_area_buffer, |
6247 | with_echo_area_buffer_unwind_data (w)); | |
6248 | ||
6249 | /* Make the echo area buffer current. Note that for display | |
6250 | purposes, it is not necessary that the displayed window's buffer | |
6251 | == current_buffer, except for text property lookup. So, let's | |
6252 | only set that buffer temporarily here without doing a full | |
6253 | Fset_window_buffer. We must also change w->pointm, though, | |
6254 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
6255 | aborts. */ | |
9142dd5b | 6256 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
6257 | if (w) |
6258 | { | |
6259 | w->buffer = buffer; | |
6260 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
6261 | } | |
ad4f174e | 6262 | |
c6e89d6c GM |
6263 | current_buffer->undo_list = Qt; |
6264 | current_buffer->read_only = Qnil; | |
bbbf6d06 | 6265 | specbind (Qinhibit_read_only, Qt); |
0b04fa5f | 6266 | specbind (Qinhibit_modification_hooks, Qt); |
c6e89d6c GM |
6267 | |
6268 | if (clear_buffer_p && Z > BEG) | |
6269 | del_range (BEG, Z); | |
6270 | ||
6271 | xassert (BEGV >= BEG); | |
6272 | xassert (ZV <= Z && ZV >= BEGV); | |
6273 | ||
23a96c77 | 6274 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
6275 | |
6276 | xassert (BEGV >= BEG); | |
6277 | xassert (ZV <= Z && ZV >= BEGV); | |
6278 | ||
6279 | unbind_to (count, Qnil); | |
6280 | return rc; | |
5f5c8ee5 GM |
6281 | } |
6282 | ||
6283 | ||
c6e89d6c GM |
6284 | /* Save state that should be preserved around the call to the function |
6285 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 6286 | |
c6e89d6c GM |
6287 | static Lisp_Object |
6288 | with_echo_area_buffer_unwind_data (w) | |
6289 | struct window *w; | |
5f5c8ee5 | 6290 | { |
c6e89d6c GM |
6291 | int i = 0; |
6292 | Lisp_Object vector; | |
5f5c8ee5 | 6293 | |
c6e89d6c GM |
6294 | /* Reduce consing by keeping one vector in |
6295 | Vwith_echo_area_save_vector. */ | |
6296 | vector = Vwith_echo_area_save_vector; | |
6297 | Vwith_echo_area_save_vector = Qnil; | |
6298 | ||
6299 | if (NILP (vector)) | |
9142dd5b | 6300 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c | 6301 | |
a61b7058 GM |
6302 | XSETBUFFER (AREF (vector, i), current_buffer); ++i; |
6303 | AREF (vector, i) = Vdeactivate_mark, ++i; | |
6304 | AREF (vector, i) = make_number (windows_or_buffers_changed), ++i; | |
c6e89d6c GM |
6305 | |
6306 | if (w) | |
6307 | { | |
a61b7058 GM |
6308 | XSETWINDOW (AREF (vector, i), w); ++i; |
6309 | AREF (vector, i) = w->buffer; ++i; | |
6310 | AREF (vector, i) = make_number (XMARKER (w->pointm)->charpos); ++i; | |
6311 | AREF (vector, i) = make_number (XMARKER (w->pointm)->bytepos); ++i; | |
c6e89d6c GM |
6312 | } |
6313 | else | |
6314 | { | |
6315 | int end = i + 4; | |
a61b7058 GM |
6316 | for (; i < end; ++i) |
6317 | AREF (vector, i) = Qnil; | |
c6e89d6c | 6318 | } |
5f5c8ee5 | 6319 | |
a61b7058 | 6320 | xassert (i == ASIZE (vector)); |
c6e89d6c GM |
6321 | return vector; |
6322 | } | |
5f5c8ee5 | 6323 | |
5f5c8ee5 | 6324 | |
c6e89d6c GM |
6325 | /* Restore global state from VECTOR which was created by |
6326 | with_echo_area_buffer_unwind_data. */ | |
6327 | ||
6328 | static Lisp_Object | |
6329 | unwind_with_echo_area_buffer (vector) | |
6330 | Lisp_Object vector; | |
6331 | { | |
bbbf6d06 GM |
6332 | set_buffer_internal_1 (XBUFFER (AREF (vector, 0))); |
6333 | Vdeactivate_mark = AREF (vector, 1); | |
6334 | windows_or_buffers_changed = XFASTINT (AREF (vector, 2)); | |
c6e89d6c | 6335 | |
bbbf6d06 | 6336 | if (WINDOWP (AREF (vector, 3))) |
c6e89d6c GM |
6337 | { |
6338 | struct window *w; | |
6339 | Lisp_Object buffer, charpos, bytepos; | |
6340 | ||
bbbf6d06 GM |
6341 | w = XWINDOW (AREF (vector, 3)); |
6342 | buffer = AREF (vector, 4); | |
6343 | charpos = AREF (vector, 5); | |
6344 | bytepos = AREF (vector, 6); | |
c6e89d6c GM |
6345 | |
6346 | w->buffer = buffer; | |
6347 | set_marker_both (w->pointm, buffer, | |
6348 | XFASTINT (charpos), XFASTINT (bytepos)); | |
6349 | } | |
6350 | ||
6351 | Vwith_echo_area_save_vector = vector; | |
6352 | return Qnil; | |
6353 | } | |
6354 | ||
6355 | ||
6356 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
6357 | non-zero means we will print multibyte. */ | |
6358 | ||
6359 | void | |
6360 | setup_echo_area_for_printing (multibyte_p) | |
6361 | int multibyte_p; | |
6362 | { | |
5bcfeb49 GM |
6363 | ensure_echo_area_buffers (); |
6364 | ||
c6e89d6c GM |
6365 | if (!message_buf_print) |
6366 | { | |
6367 | /* A message has been output since the last time we printed. | |
6368 | Choose a fresh echo area buffer. */ | |
6369 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
6370 | echo_area_buffer[0] = echo_buffer[1]; | |
6371 | else | |
6372 | echo_area_buffer[0] = echo_buffer[0]; | |
6373 | ||
6374 | /* Switch to that buffer and clear it. */ | |
6375 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
ab2c5f0a | 6376 | current_buffer->truncate_lines = Qnil; |
bbbf6d06 | 6377 | |
c6e89d6c | 6378 | if (Z > BEG) |
bbbf6d06 GM |
6379 | { |
6380 | int count = BINDING_STACK_SIZE (); | |
6381 | specbind (Qinhibit_read_only, Qt); | |
6382 | del_range (BEG, Z); | |
6383 | unbind_to (count, Qnil); | |
6384 | } | |
c6e89d6c GM |
6385 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
6386 | ||
6387 | /* Set up the buffer for the multibyteness we need. */ | |
6388 | if (multibyte_p | |
6389 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6390 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
6391 | ||
6392 | /* Raise the frame containing the echo area. */ | |
6393 | if (minibuffer_auto_raise) | |
6394 | { | |
886bd6f2 | 6395 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6396 | Lisp_Object mini_window; |
886bd6f2 | 6397 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6398 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
6399 | } | |
6400 | ||
8a4e3c0c | 6401 | message_log_maybe_newline (); |
c6e89d6c GM |
6402 | message_buf_print = 1; |
6403 | } | |
fa77249f GM |
6404 | else |
6405 | { | |
6406 | if (NILP (echo_area_buffer[0])) | |
6407 | { | |
6408 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
6409 | echo_area_buffer[0] = echo_buffer[1]; | |
6410 | else | |
6411 | echo_area_buffer[0] = echo_buffer[0]; | |
6412 | } | |
6413 | ||
6414 | if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
ab2c5f0a GM |
6415 | { |
6416 | /* Someone switched buffers between print requests. */ | |
6417 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
6418 | current_buffer->truncate_lines = Qnil; | |
6419 | } | |
fa77249f | 6420 | } |
c6e89d6c GM |
6421 | } |
6422 | ||
6423 | ||
dd2eb166 GM |
6424 | /* Display an echo area message in window W. Value is non-zero if W's |
6425 | height is changed. If display_last_displayed_message_p is | |
6426 | non-zero, display the message that was last displayed, otherwise | |
6427 | display the current message. */ | |
c6e89d6c GM |
6428 | |
6429 | static int | |
6430 | display_echo_area (w) | |
6431 | struct window *w; | |
6432 | { | |
25edb08f GM |
6433 | int i, no_message_p, window_height_changed_p, count; |
6434 | ||
6435 | /* Temporarily disable garbage collections while displaying the echo | |
6436 | area. This is done because a GC can print a message itself. | |
6437 | That message would modify the echo area buffer's contents while a | |
6438 | redisplay of the buffer is going on, and seriously confuse | |
6439 | redisplay. */ | |
6440 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
6441 | |
6442 | /* If there is no message, we must call display_echo_area_1 | |
6443 | nevertheless because it resizes the window. But we will have to | |
6444 | reset the echo_area_buffer in question to nil at the end because | |
6445 | with_echo_area_buffer will sets it to an empty buffer. */ | |
6446 | i = display_last_displayed_message_p ? 1 : 0; | |
6447 | no_message_p = NILP (echo_area_buffer[i]); | |
6448 | ||
6449 | window_height_changed_p | |
6450 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 6451 | display_echo_area_1, |
23dd2d97 | 6452 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
6453 | |
6454 | if (no_message_p) | |
6455 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
6456 | |
6457 | unbind_to (count, Qnil); | |
dd2eb166 | 6458 | return window_height_changed_p; |
c6e89d6c GM |
6459 | } |
6460 | ||
6461 | ||
6462 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
6463 | contains the current echo area message in window W, a mini-window, |
6464 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
6465 | Change the height of W so that all of the message is displayed. |
6466 | Value is non-zero if height of W was changed. */ | |
6467 | ||
6468 | static int | |
23a96c77 | 6469 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6470 | EMACS_INT a1; |
6471 | Lisp_Object a2; | |
6472 | EMACS_INT a3, a4; | |
c6e89d6c | 6473 | { |
23a96c77 | 6474 | struct window *w = (struct window *) a1; |
c6e89d6c | 6475 | Lisp_Object window; |
c6e89d6c GM |
6476 | struct text_pos start; |
6477 | int window_height_changed_p = 0; | |
6478 | ||
6479 | /* Do this before displaying, so that we have a large enough glyph | |
6480 | matrix for the display. */ | |
92a90e89 | 6481 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
6482 | |
6483 | /* Display. */ | |
6484 | clear_glyph_matrix (w->desired_matrix); | |
6485 | XSETWINDOW (window, w); | |
6486 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
6487 | try_window (window, start); | |
6488 | ||
c6e89d6c GM |
6489 | return window_height_changed_p; |
6490 | } | |
6491 | ||
6492 | ||
92a90e89 | 6493 | /* Resize the echo area window to exactly the size needed for the |
6d004fea GM |
6494 | currently displayed message, if there is one. If a mini-buffer |
6495 | is active, don't shrink it. */ | |
92a90e89 GM |
6496 | |
6497 | void | |
308a74d8 | 6498 | resize_echo_area_exactly () |
92a90e89 GM |
6499 | { |
6500 | if (BUFFERP (echo_area_buffer[0]) | |
6501 | && WINDOWP (echo_area_window)) | |
6502 | { | |
6503 | struct window *w = XWINDOW (echo_area_window); | |
6504 | int resized_p; | |
6d004fea GM |
6505 | Lisp_Object resize_exactly; |
6506 | ||
6507 | if (minibuf_level == 0) | |
6508 | resize_exactly = Qt; | |
6509 | else | |
6510 | resize_exactly = Qnil; | |
92a90e89 | 6511 | |
23a96c77 | 6512 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
6d004fea | 6513 | (EMACS_INT) w, resize_exactly, 0, 0); |
92a90e89 GM |
6514 | if (resized_p) |
6515 | { | |
6516 | ++windows_or_buffers_changed; | |
6517 | ++update_mode_lines; | |
6518 | redisplay_internal (0); | |
6519 | } | |
6520 | } | |
6521 | } | |
6522 | ||
6523 | ||
23a96c77 | 6524 | /* Callback function for with_echo_area_buffer, when used from |
308a74d8 | 6525 | resize_echo_area_exactly. A1 contains a pointer to the window to |
6d004fea GM |
6526 | resize, EXACTLY non-nil means resize the mini-window exactly to the |
6527 | size of the text displayed. A3 and A4 are not used. Value is what | |
6528 | resize_mini_window returns. */ | |
23a96c77 GM |
6529 | |
6530 | static int | |
6d004fea | 6531 | resize_mini_window_1 (a1, exactly, a3, a4) |
23dd2d97 | 6532 | EMACS_INT a1; |
6d004fea | 6533 | Lisp_Object exactly; |
23dd2d97 | 6534 | EMACS_INT a3, a4; |
23a96c77 | 6535 | { |
6d004fea | 6536 | return resize_mini_window ((struct window *) a1, !NILP (exactly)); |
23a96c77 GM |
6537 | } |
6538 | ||
6539 | ||
92a90e89 GM |
6540 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
6541 | means size the window exactly to the size needed. Otherwise, it's | |
6542 | only enlarged until W's buffer is empty. Value is non-zero if | |
6543 | the window height has been changed. */ | |
c6e89d6c | 6544 | |
9472f927 | 6545 | int |
92a90e89 | 6546 | resize_mini_window (w, exact_p) |
c6e89d6c | 6547 | struct window *w; |
92a90e89 | 6548 | int exact_p; |
c6e89d6c GM |
6549 | { |
6550 | struct frame *f = XFRAME (w->frame); | |
6551 | int window_height_changed_p = 0; | |
6552 | ||
6553 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f | 6554 | |
2913a9c0 GM |
6555 | /* Don't resize windows while redisplaying a window; it would |
6556 | confuse redisplay functions when the size of the window they are | |
6557 | displaying changes from under them. Such a resizing can happen, | |
6558 | for instance, when which-func prints a long message while | |
6559 | we are running fontification-functions. We're running these | |
6560 | functions with safe_call which binds inhibit-redisplay to t. */ | |
6561 | if (!NILP (Vinhibit_redisplay)) | |
64c5be50 GM |
6562 | return 0; |
6563 | ||
97cafc0f | 6564 | /* Nil means don't try to resize. */ |
6422c1d7 | 6565 | if (NILP (Vresize_mini_windows) |
00f6d59e | 6566 | || (FRAME_X_P (f) && f->output_data.x == NULL)) |
97cafc0f | 6567 | return 0; |
c6e89d6c GM |
6568 | |
6569 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
6570 | { | |
6571 | struct it it; | |
dd2eb166 GM |
6572 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
6573 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
6574 | int height, max_height; | |
6575 | int unit = CANON_Y_UNIT (f); | |
6576 | struct text_pos start; | |
1bfdbe43 GM |
6577 | struct buffer *old_current_buffer = NULL; |
6578 | ||
6579 | if (current_buffer != XBUFFER (w->buffer)) | |
6580 | { | |
6581 | old_current_buffer = current_buffer; | |
6582 | set_buffer_internal (XBUFFER (w->buffer)); | |
6583 | } | |
9142dd5b | 6584 | |
c6e89d6c | 6585 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 6586 | |
dd2eb166 GM |
6587 | /* Compute the max. number of lines specified by the user. */ |
6588 | if (FLOATP (Vmax_mini_window_height)) | |
18f9986a | 6589 | max_height = XFLOATINT (Vmax_mini_window_height) * FRAME_HEIGHT (f); |
dd2eb166 GM |
6590 | else if (INTEGERP (Vmax_mini_window_height)) |
6591 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
6592 | else |
6593 | max_height = total_height / 4; | |
dd2eb166 GM |
6594 | |
6595 | /* Correct that max. height if it's bogus. */ | |
6596 | max_height = max (1, max_height); | |
6597 | max_height = min (total_height, max_height); | |
6598 | ||
6599 | /* Find out the height of the text in the window. */ | |
ad4f174e GM |
6600 | if (it.truncate_lines_p) |
6601 | height = 1; | |
55b064bd | 6602 | else |
ad4f174e GM |
6603 | { |
6604 | last_height = 0; | |
6605 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
6606 | if (it.max_ascent == 0 && it.max_descent == 0) | |
6607 | height = it.current_y + last_height; | |
6608 | else | |
6609 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 6610 | height -= it.extra_line_spacing; |
ad4f174e GM |
6611 | height = (height + unit - 1) / unit; |
6612 | } | |
dd2eb166 GM |
6613 | |
6614 | /* Compute a suitable window start. */ | |
6615 | if (height > max_height) | |
6616 | { | |
6617 | height = max_height; | |
6618 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
6619 | move_it_vertically_backward (&it, (height - 1) * unit); | |
6620 | start = it.current.pos; | |
6621 | } | |
6622 | else | |
6623 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
6624 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 6625 | |
6422c1d7 | 6626 | if (EQ (Vresize_mini_windows, Qgrow_only)) |
dd2eb166 | 6627 | { |
6422c1d7 GM |
6628 | /* Let it grow only, until we display an empty message, in which |
6629 | case the window shrinks again. */ | |
6630 | if (height > XFASTINT (w->height)) | |
6631 | { | |
6632 | int old_height = XFASTINT (w->height); | |
6633 | freeze_window_starts (f, 1); | |
6634 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6635 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6636 | } | |
6637 | else if (height < XFASTINT (w->height) | |
6638 | && (exact_p || BEGV == ZV)) | |
6639 | { | |
6640 | int old_height = XFASTINT (w->height); | |
6641 | freeze_window_starts (f, 0); | |
6642 | shrink_mini_window (w); | |
6643 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6644 | } | |
da448723 | 6645 | } |
6422c1d7 | 6646 | else |
da448723 | 6647 | { |
6422c1d7 GM |
6648 | /* Always resize to exact size needed. */ |
6649 | if (height > XFASTINT (w->height)) | |
6650 | { | |
6651 | int old_height = XFASTINT (w->height); | |
6652 | freeze_window_starts (f, 1); | |
6653 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6654 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6655 | } | |
6656 | else if (height < XFASTINT (w->height)) | |
6657 | { | |
6658 | int old_height = XFASTINT (w->height); | |
6659 | freeze_window_starts (f, 0); | |
6660 | shrink_mini_window (w); | |
6661 | ||
6662 | if (height) | |
6663 | { | |
6664 | freeze_window_starts (f, 1); | |
6665 | grow_mini_window (w, height - XFASTINT (w->height)); | |
6666 | } | |
6667 | ||
6668 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
6669 | } | |
9142dd5b | 6670 | } |
1bfdbe43 GM |
6671 | |
6672 | if (old_current_buffer) | |
6673 | set_buffer_internal (old_current_buffer); | |
c6e89d6c GM |
6674 | } |
6675 | ||
6676 | return window_height_changed_p; | |
6677 | } | |
6678 | ||
6679 | ||
6680 | /* Value is the current message, a string, or nil if there is no | |
6681 | current message. */ | |
6682 | ||
6683 | Lisp_Object | |
6684 | current_message () | |
6685 | { | |
6686 | Lisp_Object msg; | |
6687 | ||
6688 | if (NILP (echo_area_buffer[0])) | |
6689 | msg = Qnil; | |
6690 | else | |
6691 | { | |
23a96c77 | 6692 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 6693 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
6694 | if (NILP (msg)) |
6695 | echo_area_buffer[0] = Qnil; | |
6696 | } | |
6697 | ||
6698 | return msg; | |
6699 | } | |
6700 | ||
6701 | ||
6702 | static int | |
23a96c77 | 6703 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6704 | EMACS_INT a1; |
6705 | Lisp_Object a2; | |
6706 | EMACS_INT a3, a4; | |
c6e89d6c | 6707 | { |
23a96c77 GM |
6708 | Lisp_Object *msg = (Lisp_Object *) a1; |
6709 | ||
c6e89d6c GM |
6710 | if (Z > BEG) |
6711 | *msg = make_buffer_string (BEG, Z, 1); | |
6712 | else | |
6713 | *msg = Qnil; | |
6714 | return 0; | |
6715 | } | |
6716 | ||
6717 | ||
6718 | /* Push the current message on Vmessage_stack for later restauration | |
6719 | by restore_message. Value is non-zero if the current message isn't | |
6720 | empty. This is a relatively infrequent operation, so it's not | |
6721 | worth optimizing. */ | |
6722 | ||
6723 | int | |
6724 | push_message () | |
6725 | { | |
6726 | Lisp_Object msg; | |
6727 | msg = current_message (); | |
6728 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
6729 | return STRINGP (msg); | |
6730 | } | |
6731 | ||
6732 | ||
098ec84a GM |
6733 | /* Handler for record_unwind_protect calling pop_message. */ |
6734 | ||
6735 | Lisp_Object | |
6736 | push_message_unwind (dummy) | |
6737 | Lisp_Object dummy; | |
6738 | { | |
6739 | pop_message (); | |
6740 | return Qnil; | |
6741 | } | |
6742 | ||
6743 | ||
c6e89d6c GM |
6744 | /* Restore message display from the top of Vmessage_stack. */ |
6745 | ||
6746 | void | |
6747 | restore_message () | |
6748 | { | |
6749 | Lisp_Object msg; | |
6750 | ||
6751 | xassert (CONSP (Vmessage_stack)); | |
6752 | msg = XCAR (Vmessage_stack); | |
6753 | if (STRINGP (msg)) | |
6754 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
6755 | else | |
6756 | message3_nolog (msg, 0, 0); | |
6757 | } | |
6758 | ||
6759 | ||
6760 | /* Pop the top-most entry off Vmessage_stack. */ | |
6761 | ||
6762 | void | |
6763 | pop_message () | |
6764 | { | |
6765 | xassert (CONSP (Vmessage_stack)); | |
6766 | Vmessage_stack = XCDR (Vmessage_stack); | |
6767 | } | |
6768 | ||
6769 | ||
6770 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
6771 | exits. If the stack is not empty, we have a missing pop_message | |
6772 | somewhere. */ | |
6773 | ||
6774 | void | |
6775 | check_message_stack () | |
6776 | { | |
6777 | if (!NILP (Vmessage_stack)) | |
6778 | abort (); | |
6779 | } | |
6780 | ||
6781 | ||
6782 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
6783 | time we display it---but don't redisplay it now. */ | |
6784 | ||
6785 | void | |
6786 | truncate_echo_area (nchars) | |
6787 | int nchars; | |
6788 | { | |
6789 | if (nchars == 0) | |
6790 | echo_area_buffer[0] = Qnil; | |
6791 | /* A null message buffer means that the frame hasn't really been | |
6792 | initialized yet. Error messages get reported properly by | |
6793 | cmd_error, so this must be just an informative message; toss it. */ | |
6794 | else if (!noninteractive | |
6795 | && INTERACTIVE | |
c6e89d6c | 6796 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
6797 | { |
6798 | struct frame *sf = SELECTED_FRAME (); | |
6799 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 6800 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 6801 | } |
c6e89d6c GM |
6802 | } |
6803 | ||
6804 | ||
6805 | /* Helper function for truncate_echo_area. Truncate the current | |
6806 | message to at most NCHARS characters. */ | |
6807 | ||
6808 | static int | |
23a96c77 | 6809 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
6810 | EMACS_INT nchars; |
6811 | Lisp_Object a2; | |
6812 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6813 | { |
6814 | if (BEG + nchars < Z) | |
6815 | del_range (BEG + nchars, Z); | |
6816 | if (Z == BEG) | |
6817 | echo_area_buffer[0] = Qnil; | |
6818 | return 0; | |
6819 | } | |
6820 | ||
6821 | ||
6822 | /* Set the current message to a substring of S or STRING. | |
6823 | ||
6824 | If STRING is a Lisp string, set the message to the first NBYTES | |
6825 | bytes from STRING. NBYTES zero means use the whole string. If | |
6826 | STRING is multibyte, the message will be displayed multibyte. | |
6827 | ||
6828 | If S is not null, set the message to the first LEN bytes of S. LEN | |
6829 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
6830 | multibyte. Display the message multibyte in that case. */ | |
6831 | ||
6832 | void | |
6833 | set_message (s, string, nbytes, multibyte_p) | |
6834 | char *s; | |
6835 | Lisp_Object string; | |
6836 | int nbytes; | |
6837 | { | |
6838 | message_enable_multibyte | |
6839 | = ((s && multibyte_p) | |
6840 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
6841 | ||
23a96c77 GM |
6842 | with_echo_area_buffer (0, -1, set_message_1, |
6843 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c | 6844 | message_buf_print = 0; |
21fdfb65 | 6845 | help_echo_showing_p = 0; |
c6e89d6c GM |
6846 | } |
6847 | ||
6848 | ||
6849 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
6850 | as there, with A1 corresponding to S and A2 corresponding to STRING |
6851 | This function is called with the echo area buffer being | |
c6e89d6c GM |
6852 | current. */ |
6853 | ||
6854 | static int | |
23a96c77 | 6855 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
6856 | EMACS_INT a1; |
6857 | Lisp_Object a2; | |
6858 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 6859 | { |
23a96c77 | 6860 | char *s = (char *) a1; |
23dd2d97 | 6861 | Lisp_Object string = a2; |
23a96c77 | 6862 | |
c6e89d6c GM |
6863 | xassert (BEG == Z); |
6864 | ||
6865 | /* Change multibyteness of the echo buffer appropriately. */ | |
6866 | if (message_enable_multibyte | |
6867 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6868 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
6869 | ||
ad4f174e GM |
6870 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
6871 | ||
c6e89d6c GM |
6872 | /* Insert new message at BEG. */ |
6873 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
6874 | ||
6875 | if (STRINGP (string)) | |
6876 | { | |
6877 | int nchars; | |
6878 | ||
6879 | if (nbytes == 0) | |
6880 | nbytes = XSTRING (string)->size_byte; | |
6881 | nchars = string_byte_to_char (string, nbytes); | |
6882 | ||
6883 | /* This function takes care of single/multibyte conversion. We | |
6884 | just have to ensure that the echo area buffer has the right | |
6885 | setting of enable_multibyte_characters. */ | |
6886 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
6887 | } | |
6888 | else if (s) | |
6889 | { | |
6890 | if (nbytes == 0) | |
6891 | nbytes = strlen (s); | |
6892 | ||
6893 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
6894 | { | |
6895 | /* Convert from multi-byte to single-byte. */ | |
6896 | int i, c, n; | |
6897 | unsigned char work[1]; | |
6898 | ||
6899 | /* Convert a multibyte string to single-byte. */ | |
6900 | for (i = 0; i < nbytes; i += n) | |
6901 | { | |
6902 | c = string_char_and_length (s + i, nbytes - i, &n); | |
6903 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
6904 | ? c | |
6905 | : multibyte_char_to_unibyte (c, Qnil)); | |
6906 | insert_1_both (work, 1, 1, 1, 0, 0); | |
6907 | } | |
6908 | } | |
6909 | else if (!multibyte_p | |
6910 | && !NILP (current_buffer->enable_multibyte_characters)) | |
6911 | { | |
6912 | /* Convert from single-byte to multi-byte. */ | |
6913 | int i, c, n; | |
6914 | unsigned char *msg = (unsigned char *) s; | |
260a86a0 | 6915 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c6e89d6c GM |
6916 | |
6917 | /* Convert a single-byte string to multibyte. */ | |
6918 | for (i = 0; i < nbytes; i++) | |
6919 | { | |
6920 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
6921 | n = CHAR_STRING (c, str); |
6922 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
6923 | } |
6924 | } | |
6925 | else | |
6926 | insert_1 (s, nbytes, 1, 0, 0); | |
6927 | } | |
6928 | ||
6929 | return 0; | |
6930 | } | |
6931 | ||
6932 | ||
6933 | /* Clear messages. CURRENT_P non-zero means clear the current | |
6934 | message. LAST_DISPLAYED_P non-zero means clear the message | |
6935 | last displayed. */ | |
6936 | ||
6937 | void | |
6938 | clear_message (current_p, last_displayed_p) | |
6939 | int current_p, last_displayed_p; | |
6940 | { | |
6941 | if (current_p) | |
6e019995 GM |
6942 | { |
6943 | echo_area_buffer[0] = Qnil; | |
6944 | message_cleared_p = 1; | |
6945 | } | |
c6e89d6c GM |
6946 | |
6947 | if (last_displayed_p) | |
6948 | echo_area_buffer[1] = Qnil; | |
6949 | ||
6950 | message_buf_print = 0; | |
6951 | } | |
6952 | ||
6953 | /* Clear garbaged frames. | |
6954 | ||
6955 | This function is used where the old redisplay called | |
6956 | redraw_garbaged_frames which in turn called redraw_frame which in | |
6957 | turn called clear_frame. The call to clear_frame was a source of | |
6958 | flickering. I believe a clear_frame is not necessary. It should | |
6959 | suffice in the new redisplay to invalidate all current matrices, | |
6960 | and ensure a complete redisplay of all windows. */ | |
6961 | ||
6962 | static void | |
6963 | clear_garbaged_frames () | |
6964 | { | |
5f5c8ee5 GM |
6965 | if (frame_garbaged) |
6966 | { | |
5f5c8ee5 GM |
6967 | Lisp_Object tail, frame; |
6968 | ||
6969 | FOR_EACH_FRAME (tail, frame) | |
6970 | { | |
6971 | struct frame *f = XFRAME (frame); | |
6972 | ||
6973 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
6974 | { | |
6bb95882 | 6975 | if (f->resized_p) |
573e57f1 | 6976 | Fredraw_frame (frame); |
5f5c8ee5 GM |
6977 | clear_current_matrices (f); |
6978 | f->garbaged = 0; | |
6bb95882 | 6979 | f->resized_p = 0; |
5f5c8ee5 GM |
6980 | } |
6981 | } | |
6982 | ||
6983 | frame_garbaged = 0; | |
6984 | ++windows_or_buffers_changed; | |
6985 | } | |
c6e89d6c | 6986 | } |
5f5c8ee5 | 6987 | |
5f5c8ee5 | 6988 | |
886bd6f2 GM |
6989 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
6990 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 6991 | mini-windows height has been changed. */ |
5f5c8ee5 | 6992 | |
c6e89d6c GM |
6993 | static int |
6994 | echo_area_display (update_frame_p) | |
6995 | int update_frame_p; | |
6996 | { | |
6997 | Lisp_Object mini_window; | |
6998 | struct window *w; | |
6999 | struct frame *f; | |
7000 | int window_height_changed_p = 0; | |
886bd6f2 | 7001 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 7002 | |
886bd6f2 | 7003 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
7004 | w = XWINDOW (mini_window); |
7005 | f = XFRAME (WINDOW_FRAME (w)); | |
7006 | ||
7007 | /* Don't display if frame is invisible or not yet initialized. */ | |
7008 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
7009 | return 0; | |
5f5c8ee5 | 7010 | |
1a578e9b AC |
7011 | /* The terminal frame is used as the first Emacs frame on the Mac OS. */ |
7012 | #ifndef macintosh | |
1ab3e082 | 7013 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
7014 | /* When Emacs starts, selected_frame may be a visible terminal |
7015 | frame, even if we run under a window system. If we let this | |
7016 | through, a message would be displayed on the terminal. */ | |
622e3754 GM |
7017 | if (EQ (selected_frame, Vterminal_frame) |
7018 | && !NILP (Vwindow_system)) | |
c6e89d6c | 7019 | return 0; |
1ab3e082 | 7020 | #endif /* HAVE_WINDOW_SYSTEM */ |
1a578e9b | 7021 | #endif |
c6e89d6c GM |
7022 | |
7023 | /* Redraw garbaged frames. */ | |
7024 | if (frame_garbaged) | |
7025 | clear_garbaged_frames (); | |
7026 | ||
7027 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
7028 | { | |
7029 | echo_area_window = mini_window; | |
7030 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 7031 | w->must_be_updated_p = 1; |
c59c668a | 7032 | |
d4358b37 GM |
7033 | /* Update the display, unless called from redisplay_internal. |
7034 | Also don't update the screen during redisplay itself. The | |
7035 | update will happen at the end of redisplay, and an update | |
7036 | here could cause confusion. */ | |
7037 | if (update_frame_p && !redisplaying_p) | |
5f5c8ee5 | 7038 | { |
715e84c9 | 7039 | int n = 0; |
edc68111 | 7040 | |
715e84c9 GM |
7041 | /* If the display update has been interrupted by pending |
7042 | input, update mode lines in the frame. Due to the | |
7043 | pending input, it might have been that redisplay hasn't | |
7044 | been called, so that mode lines above the echo area are | |
7045 | garbaged. This looks odd, so we prevent it here. */ | |
7046 | if (!display_completed) | |
7047 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
7048 | ||
8af1308e GM |
7049 | if (window_height_changed_p |
7050 | /* Don't do this if Emacs is shutting down. Redisplay | |
7051 | needs to run hooks. */ | |
7052 | && !NILP (Vrun_hooks)) | |
c59c668a | 7053 | { |
c06017fb GM |
7054 | /* Must update other windows. Likewise as in other |
7055 | cases, don't let this update be interrupted by | |
7056 | pending input. */ | |
7057 | int count = BINDING_STACK_SIZE (); | |
7058 | specbind (Qredisplay_dont_pause, Qt); | |
edc68111 | 7059 | windows_or_buffers_changed = 1; |
c59c668a | 7060 | redisplay_internal (0); |
c06017fb | 7061 | unbind_to (count, Qnil); |
c59c668a | 7062 | } |
715e84c9 | 7063 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 7064 | { |
edc68111 | 7065 | /* Window configuration is the same as before. |
715e84c9 GM |
7066 | Can do with a display update of the echo area, |
7067 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
7068 | update_single_window (w, 1); |
7069 | rif->flush_display (f); | |
7070 | } | |
7071 | else | |
7072 | update_frame (f, 1, 1); | |
31b6671b GM |
7073 | |
7074 | /* If cursor is in the echo area, make sure that the next | |
7075 | redisplay displays the minibuffer, so that the cursor will | |
7076 | be replaced with what the minibuffer wants. */ | |
7077 | if (cursor_in_echo_area) | |
7078 | ++windows_or_buffers_changed; | |
5f5c8ee5 GM |
7079 | } |
7080 | } | |
7081 | else if (!EQ (mini_window, selected_window)) | |
7082 | windows_or_buffers_changed++; | |
c59c668a GM |
7083 | |
7084 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
7085 | echo_area_buffer[1] = echo_area_buffer[0]; |
7086 | ||
5f5c8ee5 GM |
7087 | /* Prevent redisplay optimization in redisplay_internal by resetting |
7088 | this_line_start_pos. This is done because the mini-buffer now | |
7089 | displays the message instead of its buffer text. */ | |
7090 | if (EQ (mini_window, selected_window)) | |
7091 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
7092 | |
7093 | return window_height_changed_p; | |
5f5c8ee5 GM |
7094 | } |
7095 | ||
7096 | ||
7097 | \f | |
7098 | /*********************************************************************** | |
7099 | Frame Titles | |
7100 | ***********************************************************************/ | |
7101 | ||
7102 | ||
7103 | #ifdef HAVE_WINDOW_SYSTEM | |
7104 | ||
7105 | /* A buffer for constructing frame titles in it; allocated from the | |
7106 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
7107 | ||
7108 | static char *frame_title_buf; | |
7109 | ||
7110 | /* The buffer's end, and a current output position in it. */ | |
7111 | ||
7112 | static char *frame_title_buf_end; | |
7113 | static char *frame_title_ptr; | |
7114 | ||
7115 | ||
7116 | /* Store a single character C for the frame title in frame_title_buf. | |
7117 | Re-allocate frame_title_buf if necessary. */ | |
7118 | ||
7119 | static void | |
7120 | store_frame_title_char (c) | |
7121 | char c; | |
7122 | { | |
7123 | /* If output position has reached the end of the allocated buffer, | |
7124 | double the buffer's size. */ | |
7125 | if (frame_title_ptr == frame_title_buf_end) | |
7126 | { | |
7127 | int len = frame_title_ptr - frame_title_buf; | |
7128 | int new_size = 2 * len * sizeof *frame_title_buf; | |
7129 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
7130 | frame_title_buf_end = frame_title_buf + new_size; | |
7131 | frame_title_ptr = frame_title_buf + len; | |
7132 | } | |
7133 | ||
7134 | *frame_title_ptr++ = c; | |
7135 | } | |
7136 | ||
7137 | ||
7138 | /* Store part of a frame title in frame_title_buf, beginning at | |
d26b89b8 KH |
7139 | frame_title_ptr. STR is the string to store. Do not copy |
7140 | characters that yield more columns than PRECISION; PRECISION <= 0 | |
7141 | means copy the whole string. Pad with spaces until FIELD_WIDTH | |
7142 | number of characters have been copied; FIELD_WIDTH <= 0 means don't | |
7143 | pad. Called from display_mode_element when it is used to build a | |
7144 | frame title. */ | |
5f5c8ee5 GM |
7145 | |
7146 | static int | |
7147 | store_frame_title (str, field_width, precision) | |
7148 | unsigned char *str; | |
7149 | int field_width, precision; | |
7150 | { | |
7151 | int n = 0; | |
3b552d56 | 7152 | int dummy, nbytes; |
5f5c8ee5 GM |
7153 | |
7154 | /* Copy at most PRECISION chars from STR. */ | |
d26b89b8 KH |
7155 | nbytes = strlen (str); |
7156 | n+= c_string_width (str, nbytes, precision, &dummy, &nbytes); | |
7157 | while (nbytes--) | |
7158 | store_frame_title_char (*str++); | |
5f5c8ee5 GM |
7159 | |
7160 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
7161 | while (field_width > 0 | |
7162 | && n < field_width) | |
7163 | { | |
7164 | store_frame_title_char (' '); | |
7165 | ++n; | |
7166 | } | |
7167 | ||
7168 | return n; | |
7169 | } | |
7170 | ||
7171 | ||
7172 | /* Set the title of FRAME, if it has changed. The title format is | |
7173 | Vicon_title_format if FRAME is iconified, otherwise it is | |
7174 | frame_title_format. */ | |
7175 | ||
7176 | static void | |
7177 | x_consider_frame_title (frame) | |
7178 | Lisp_Object frame; | |
7179 | { | |
7180 | struct frame *f = XFRAME (frame); | |
7181 | ||
7182 | if (FRAME_WINDOW_P (f) | |
7183 | || FRAME_MINIBUF_ONLY_P (f) | |
7184 | || f->explicit_name) | |
7185 | { | |
7186 | /* Do we have more than one visible frame on this X display? */ | |
7187 | Lisp_Object tail; | |
7188 | Lisp_Object fmt; | |
7189 | struct buffer *obuf; | |
7190 | int len; | |
7191 | struct it it; | |
7192 | ||
9472f927 | 7193 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 7194 | { |
9472f927 | 7195 | struct frame *tf = XFRAME (XCAR (tail)); |
5f5c8ee5 GM |
7196 | |
7197 | if (tf != f | |
7198 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
7199 | && !FRAME_MINIBUF_ONLY_P (tf) | |
7200 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
7201 | break; | |
7202 | } | |
7203 | ||
7204 | /* Set global variable indicating that multiple frames exist. */ | |
7205 | multiple_frames = CONSP (tail); | |
7206 | ||
7207 | /* Switch to the buffer of selected window of the frame. Set up | |
7208 | frame_title_ptr so that display_mode_element will output into it; | |
7209 | then display the title. */ | |
7210 | obuf = current_buffer; | |
7211 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
7212 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
7213 | frame_title_ptr = frame_title_buf; | |
7214 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
7215 | NULL, DEFAULT_FACE_ID); | |
d26b89b8 KH |
7216 | display_mode_element (&it, 0, -1, -1, fmt); |
7217 | len = frame_title_ptr - frame_title_buf; | |
5f5c8ee5 GM |
7218 | frame_title_ptr = NULL; |
7219 | set_buffer_internal (obuf); | |
7220 | ||
7221 | /* Set the title only if it's changed. This avoids consing in | |
7222 | the common case where it hasn't. (If it turns out that we've | |
7223 | already wasted too much time by walking through the list with | |
7224 | display_mode_element, then we might need to optimize at a | |
7225 | higher level than this.) */ | |
7226 | if (! STRINGP (f->name) | |
7227 | || STRING_BYTES (XSTRING (f->name)) != len | |
7228 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
7229 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
7230 | } | |
7231 | } | |
7232 | ||
7233 | #else /* not HAVE_WINDOW_SYSTEM */ | |
7234 | ||
7235 | #define frame_title_ptr ((char *)0) | |
7236 | #define store_frame_title(str, mincol, maxcol) 0 | |
7237 | ||
7238 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
7239 | ||
7240 | ||
7241 | ||
7242 | \f | |
7243 | /*********************************************************************** | |
7244 | Menu Bars | |
7245 | ***********************************************************************/ | |
7246 | ||
7247 | ||
7248 | /* Prepare for redisplay by updating menu-bar item lists when | |
7249 | appropriate. This can call eval. */ | |
7250 | ||
7251 | void | |
7252 | prepare_menu_bars () | |
7253 | { | |
7254 | int all_windows; | |
7255 | struct gcpro gcpro1, gcpro2; | |
7256 | struct frame *f; | |
6b5c4794 | 7257 | Lisp_Object tooltip_frame; |
5f5c8ee5 GM |
7258 | |
7259 | #ifdef HAVE_X_WINDOWS | |
7260 | tooltip_frame = tip_frame; | |
7261 | #else | |
6b5c4794 | 7262 | tooltip_frame = Qnil; |
5f5c8ee5 GM |
7263 | #endif |
7264 | ||
7265 | /* Update all frame titles based on their buffer names, etc. We do | |
7266 | this before the menu bars so that the buffer-menu will show the | |
7267 | up-to-date frame titles. */ | |
7268 | #ifdef HAVE_WINDOW_SYSTEM | |
7269 | if (windows_or_buffers_changed || update_mode_lines) | |
7270 | { | |
7271 | Lisp_Object tail, frame; | |
7272 | ||
7273 | FOR_EACH_FRAME (tail, frame) | |
7274 | { | |
7275 | f = XFRAME (frame); | |
6b5c4794 | 7276 | if (!EQ (frame, tooltip_frame) |
5f5c8ee5 GM |
7277 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) |
7278 | x_consider_frame_title (frame); | |
7279 | } | |
7280 | } | |
7281 | #endif /* HAVE_WINDOW_SYSTEM */ | |
7282 | ||
7283 | /* Update the menu bar item lists, if appropriate. This has to be | |
7284 | done before any actual redisplay or generation of display lines. */ | |
7285 | all_windows = (update_mode_lines | |
7286 | || buffer_shared > 1 | |
7287 | || windows_or_buffers_changed); | |
7288 | if (all_windows) | |
7289 | { | |
7290 | Lisp_Object tail, frame; | |
2d27dae2 | 7291 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 GM |
7292 | |
7293 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7294 | ||
7295 | FOR_EACH_FRAME (tail, frame) | |
7296 | { | |
7297 | f = XFRAME (frame); | |
7298 | ||
7299 | /* Ignore tooltip frame. */ | |
6b5c4794 | 7300 | if (EQ (frame, tooltip_frame)) |
5f5c8ee5 GM |
7301 | continue; |
7302 | ||
7303 | /* If a window on this frame changed size, report that to | |
7304 | the user and clear the size-change flag. */ | |
7305 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
7306 | { | |
7307 | Lisp_Object functions; | |
7308 | ||
7309 | /* Clear flag first in case we get an error below. */ | |
7310 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
7311 | functions = Vwindow_size_change_functions; | |
7312 | GCPRO2 (tail, functions); | |
7313 | ||
7314 | while (CONSP (functions)) | |
7315 | { | |
7316 | call1 (XCAR (functions), frame); | |
7317 | functions = XCDR (functions); | |
7318 | } | |
7319 | UNGCPRO; | |
7320 | } | |
7321 | ||
7322 | GCPRO1 (tail); | |
7323 | update_menu_bar (f, 0); | |
7324 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 7325 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
7326 | #endif |
7327 | UNGCPRO; | |
7328 | } | |
7329 | ||
7330 | unbind_to (count, Qnil); | |
7331 | } | |
7332 | else | |
7333 | { | |
886bd6f2 GM |
7334 | struct frame *sf = SELECTED_FRAME (); |
7335 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 7336 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 7337 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
7338 | #endif |
7339 | } | |
7340 | ||
7341 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
7342 | pending_menu_activation is not defined. */ | |
7343 | #ifdef USE_X_TOOLKIT | |
7344 | pending_menu_activation = 0; | |
7345 | #endif | |
7346 | } | |
7347 | ||
7348 | ||
7349 | /* Update the menu bar item list for frame F. This has to be done | |
7350 | before we start to fill in any display lines, because it can call | |
7351 | eval. | |
7352 | ||
7353 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
7354 | ||
7355 | static void | |
7356 | update_menu_bar (f, save_match_data) | |
7357 | struct frame *f; | |
7358 | int save_match_data; | |
7359 | { | |
7360 | Lisp_Object window; | |
7361 | register struct window *w; | |
7362 | ||
e1477f43 GM |
7363 | /* If called recursively during a menu update, do nothing. This can |
7364 | happen when, for instance, an activate-menubar-hook causes a | |
7365 | redisplay. */ | |
7366 | if (inhibit_menubar_update) | |
7367 | return; | |
7368 | ||
5f5c8ee5 GM |
7369 | window = FRAME_SELECTED_WINDOW (f); |
7370 | w = XWINDOW (window); | |
7371 | ||
7372 | if (update_mode_lines) | |
7373 | w->update_mode_line = Qt; | |
7374 | ||
7375 | if (FRAME_WINDOW_P (f) | |
7376 | ? | |
1a578e9b | 7377 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
5f5c8ee5 GM |
7378 | FRAME_EXTERNAL_MENU_BAR (f) |
7379 | #else | |
7380 | FRAME_MENU_BAR_LINES (f) > 0 | |
7381 | #endif | |
7382 | : FRAME_MENU_BAR_LINES (f) > 0) | |
7383 | { | |
7384 | /* If the user has switched buffers or windows, we need to | |
7385 | recompute to reflect the new bindings. But we'll | |
7386 | recompute when update_mode_lines is set too; that means | |
7387 | that people can use force-mode-line-update to request | |
7388 | that the menu bar be recomputed. The adverse effect on | |
7389 | the rest of the redisplay algorithm is about the same as | |
7390 | windows_or_buffers_changed anyway. */ | |
7391 | if (windows_or_buffers_changed | |
7392 | || !NILP (w->update_mode_line) | |
7393 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7394 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7395 | != !NILP (w->last_had_star)) | |
7396 | || ((!NILP (Vtransient_mark_mode) | |
7397 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7398 | != !NILP (w->region_showing))) | |
7399 | { | |
7400 | struct buffer *prev = current_buffer; | |
2d27dae2 | 7401 | int count = BINDING_STACK_SIZE (); |
5f5c8ee5 | 7402 | |
e1477f43 GM |
7403 | specbind (Qinhibit_menubar_update, Qt); |
7404 | ||
5f5c8ee5 GM |
7405 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7406 | if (save_match_data) | |
7407 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7408 | if (NILP (Voverriding_local_map_menu_flag)) | |
7409 | { | |
7410 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7411 | specbind (Qoverriding_local_map, Qnil); | |
7412 | } | |
7413 | ||
7414 | /* Run the Lucid hook. */ | |
65048e97 | 7415 | safe_run_hooks (Qactivate_menubar_hook); |
5f5c8ee5 GM |
7416 | |
7417 | /* If it has changed current-menubar from previous value, | |
7418 | really recompute the menu-bar from the value. */ | |
7419 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
7420 | call0 (Qrecompute_lucid_menubar); | |
7421 | ||
7422 | safe_run_hooks (Qmenu_bar_update_hook); | |
7423 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
7424 | ||
7425 | /* Redisplay the menu bar in case we changed it. */ | |
1a578e9b AC |
7426 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
7427 | if (FRAME_WINDOW_P (f) | |
7428 | #if defined (macintosh) | |
7429 | /* All frames on Mac OS share the same menubar. So only the | |
7430 | selected frame should be allowed to set it. */ | |
7431 | && f == SELECTED_FRAME () | |
7432 | #endif | |
7433 | ) | |
5f5c8ee5 GM |
7434 | set_frame_menubar (f, 0, 0); |
7435 | else | |
7436 | /* On a terminal screen, the menu bar is an ordinary screen | |
7437 | line, and this makes it get updated. */ | |
7438 | w->update_mode_line = Qt; | |
7439 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
7440 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
7441 | line, and this makes it get updated. */ | |
7442 | w->update_mode_line = Qt; | |
7443 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
7444 | ||
7445 | unbind_to (count, Qnil); | |
7446 | set_buffer_internal_1 (prev); | |
7447 | } | |
7448 | } | |
7449 | } | |
7450 | ||
7451 | ||
7452 | \f | |
7453 | /*********************************************************************** | |
e037b9ec | 7454 | Tool-bars |
5f5c8ee5 GM |
7455 | ***********************************************************************/ |
7456 | ||
7457 | #ifdef HAVE_WINDOW_SYSTEM | |
7458 | ||
e037b9ec | 7459 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
7460 | before we start to fill in any display lines. Called from |
7461 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
7462 | and restore it here. */ | |
7463 | ||
7464 | static void | |
e037b9ec | 7465 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
7466 | struct frame *f; |
7467 | int save_match_data; | |
7468 | { | |
e037b9ec GM |
7469 | if (WINDOWP (f->tool_bar_window) |
7470 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
7471 | { |
7472 | Lisp_Object window; | |
7473 | struct window *w; | |
7474 | ||
7475 | window = FRAME_SELECTED_WINDOW (f); | |
7476 | w = XWINDOW (window); | |
7477 | ||
7478 | /* If the user has switched buffers or windows, we need to | |
7479 | recompute to reflect the new bindings. But we'll | |
7480 | recompute when update_mode_lines is set too; that means | |
7481 | that people can use force-mode-line-update to request | |
7482 | that the menu bar be recomputed. The adverse effect on | |
7483 | the rest of the redisplay algorithm is about the same as | |
7484 | windows_or_buffers_changed anyway. */ | |
7485 | if (windows_or_buffers_changed | |
7486 | || !NILP (w->update_mode_line) | |
7487 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7488 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
7489 | != !NILP (w->last_had_star)) | |
7490 | || ((!NILP (Vtransient_mark_mode) | |
7491 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7492 | != !NILP (w->region_showing))) | |
7493 | { | |
7494 | struct buffer *prev = current_buffer; | |
2d27dae2 | 7495 | int count = BINDING_STACK_SIZE (); |
a2889657 | 7496 | |
5f5c8ee5 GM |
7497 | /* Set current_buffer to the buffer of the selected |
7498 | window of the frame, so that we get the right local | |
7499 | keymaps. */ | |
7500 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 7501 | |
5f5c8ee5 GM |
7502 | /* Save match data, if we must. */ |
7503 | if (save_match_data) | |
7504 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
7505 | ||
7506 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
7507 | if (NILP (Voverriding_local_map_menu_flag)) | |
7508 | { | |
7509 | specbind (Qoverriding_terminal_local_map, Qnil); | |
7510 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 7511 | } |
1f40cad2 | 7512 | |
e037b9ec | 7513 | /* Build desired tool-bar items from keymaps. */ |
7464726e GM |
7514 | f->tool_bar_items |
7515 | = tool_bar_items (f->tool_bar_items, &f->n_tool_bar_items); | |
5f5c8ee5 | 7516 | |
e037b9ec | 7517 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
7518 | w->update_mode_line = Qt; |
7519 | ||
7520 | unbind_to (count, Qnil); | |
7521 | set_buffer_internal_1 (prev); | |
81d478f3 | 7522 | } |
a2889657 JB |
7523 | } |
7524 | } | |
7525 | ||
6c4429a5 | 7526 | |
e037b9ec | 7527 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
7464726e | 7528 | F's desired tool-bar contents. F->tool_bar_items must have |
5f5c8ee5 GM |
7529 | been set up previously by calling prepare_menu_bars. */ |
7530 | ||
a2889657 | 7531 | static void |
e037b9ec | 7532 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 7533 | struct frame *f; |
a2889657 | 7534 | { |
a23887b9 | 7535 | int i, size, size_needed; |
5f5c8ee5 GM |
7536 | struct gcpro gcpro1, gcpro2, gcpro3; |
7537 | Lisp_Object image, plist, props; | |
a2889657 | 7538 | |
5f5c8ee5 GM |
7539 | image = plist = props = Qnil; |
7540 | GCPRO3 (image, plist, props); | |
a2889657 | 7541 | |
e037b9ec | 7542 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
7543 | Otherwise, make a new string. */ |
7544 | ||
7545 | /* The size of the string we might be able to reuse. */ | |
e037b9ec GM |
7546 | size = (STRINGP (f->desired_tool_bar_string) |
7547 | ? XSTRING (f->desired_tool_bar_string)->size | |
5f5c8ee5 GM |
7548 | : 0); |
7549 | ||
b94c0d9c | 7550 | /* We need one space in the string for each image. */ |
a23887b9 | 7551 | size_needed = f->n_tool_bar_items; |
b94c0d9c GM |
7552 | |
7553 | /* Reuse f->desired_tool_bar_string, if possible. */ | |
cb2ddc53 | 7554 | if (size < size_needed || NILP (f->desired_tool_bar_string)) |
6fc556fd KR |
7555 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
7556 | make_number (' ')); | |
5f5c8ee5 GM |
7557 | else |
7558 | { | |
7559 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
7560 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 7561 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7562 | } |
a2889657 | 7563 | |
5f5c8ee5 | 7564 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
7565 | put a `menu_item' property on tool-bar items with a value that |
7566 | is the index of the item in F's tool-bar item vector. */ | |
a23887b9 | 7567 | for (i = 0; i < f->n_tool_bar_items; ++i) |
a2889657 | 7568 | { |
7464726e | 7569 | #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX)) |
5f5c8ee5 | 7570 | |
e037b9ec GM |
7571 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
7572 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
35a41507 | 7573 | int hmargin, vmargin, relief, idx, end; |
ecd01a0e | 7574 | extern Lisp_Object QCrelief, QCmargin, QCconversion, Qimage; |
5f5c8ee5 GM |
7575 | |
7576 | /* If image is a vector, choose the image according to the | |
7577 | button state. */ | |
e037b9ec | 7578 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
7579 | if (VECTORP (image)) |
7580 | { | |
5f5c8ee5 GM |
7581 | if (enabled_p) |
7582 | idx = (selected_p | |
e037b9ec GM |
7583 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
7584 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
7585 | else |
7586 | idx = (selected_p | |
e037b9ec GM |
7587 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
7588 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 | 7589 | |
37e4e482 GM |
7590 | xassert (ASIZE (image) >= idx); |
7591 | image = AREF (image, idx); | |
5f5c8ee5 | 7592 | } |
37e4e482 GM |
7593 | else |
7594 | idx = -1; | |
5f5c8ee5 GM |
7595 | |
7596 | /* Ignore invalid image specifications. */ | |
7597 | if (!valid_image_p (image)) | |
7598 | continue; | |
7599 | ||
e037b9ec | 7600 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
7601 | plist = Fcopy_sequence (XCDR (image)); |
7602 | ||
7603 | /* Compute margin and relief to draw. */ | |
9f864bf9 | 7604 | relief = (tool_bar_button_relief >= 0 |
c3d76173 GM |
7605 | ? tool_bar_button_relief |
7606 | : DEFAULT_TOOL_BAR_BUTTON_RELIEF); | |
35a41507 GM |
7607 | hmargin = vmargin = relief; |
7608 | ||
7609 | if (INTEGERP (Vtool_bar_button_margin) | |
7610 | && XINT (Vtool_bar_button_margin) > 0) | |
7611 | { | |
7612 | hmargin += XFASTINT (Vtool_bar_button_margin); | |
7613 | vmargin += XFASTINT (Vtool_bar_button_margin); | |
7614 | } | |
7615 | else if (CONSP (Vtool_bar_button_margin)) | |
7616 | { | |
7617 | if (INTEGERP (XCAR (Vtool_bar_button_margin)) | |
7618 | && XINT (XCAR (Vtool_bar_button_margin)) > 0) | |
7619 | hmargin += XFASTINT (XCAR (Vtool_bar_button_margin)); | |
7620 | ||
7621 | if (INTEGERP (XCDR (Vtool_bar_button_margin)) | |
7622 | && XINT (XCDR (Vtool_bar_button_margin)) > 0) | |
7623 | vmargin += XFASTINT (XCDR (Vtool_bar_button_margin)); | |
7624 | } | |
5f5c8ee5 | 7625 | |
e037b9ec | 7626 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
7627 | { |
7628 | /* Add a `:relief' property to the image spec if the item is | |
7629 | selected. */ | |
7630 | if (selected_p) | |
7631 | { | |
7632 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
35a41507 GM |
7633 | hmargin -= relief; |
7634 | vmargin -= relief; | |
5f5c8ee5 GM |
7635 | } |
7636 | } | |
7637 | else | |
7638 | { | |
7639 | /* If image is selected, display it pressed, i.e. with a | |
7640 | negative relief. If it's not selected, display it with a | |
7641 | raised relief. */ | |
7642 | plist = Fplist_put (plist, QCrelief, | |
7643 | (selected_p | |
7644 | ? make_number (-relief) | |
7645 | : make_number (relief))); | |
35a41507 GM |
7646 | hmargin -= relief; |
7647 | vmargin -= relief; | |
5f5c8ee5 GM |
7648 | } |
7649 | ||
7650 | /* Put a margin around the image. */ | |
35a41507 GM |
7651 | if (hmargin || vmargin) |
7652 | { | |
7653 | if (hmargin == vmargin) | |
7654 | plist = Fplist_put (plist, QCmargin, make_number (hmargin)); | |
7655 | else | |
7656 | plist = Fplist_put (plist, QCmargin, | |
7657 | Fcons (make_number (hmargin), | |
7658 | make_number (vmargin))); | |
7659 | } | |
5f5c8ee5 | 7660 | |
37e4e482 GM |
7661 | /* If button is not enabled, and we don't have special images |
7662 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 7663 | applying an appropriate algorithm to it. */ |
37e4e482 | 7664 | if (!enabled_p && idx < 0) |
ecd01a0e | 7665 | plist = Fplist_put (plist, QCconversion, Qdisabled); |
5f5c8ee5 GM |
7666 | |
7667 | /* Put a `display' text property on the string for the image to | |
7668 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 7669 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
7670 | vector. */ |
7671 | image = Fcons (Qimage, plist); | |
7672 | props = list4 (Qdisplay, image, | |
a23887b9 GM |
7673 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)); |
7674 | ||
7675 | /* Let the last image hide all remaining spaces in the tool bar | |
7676 | string. The string can be longer than needed when we reuse a | |
7677 | previous string. */ | |
7678 | if (i + 1 == f->n_tool_bar_items) | |
7679 | end = XSTRING (f->desired_tool_bar_string)->size; | |
7680 | else | |
7681 | end = i + 1; | |
7682 | Fadd_text_properties (make_number (i), make_number (end), | |
e037b9ec | 7683 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 7684 | #undef PROP |
a2889657 JB |
7685 | } |
7686 | ||
5f5c8ee5 GM |
7687 | UNGCPRO; |
7688 | } | |
7689 | ||
7690 | ||
e037b9ec | 7691 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
7692 | |
7693 | static void | |
e037b9ec | 7694 | display_tool_bar_line (it) |
5f5c8ee5 GM |
7695 | struct it *it; |
7696 | { | |
7697 | struct glyph_row *row = it->glyph_row; | |
7698 | int max_x = it->last_visible_x; | |
7699 | struct glyph *last; | |
7700 | ||
7701 | prepare_desired_row (row); | |
7702 | row->y = it->current_y; | |
90aa2856 GM |
7703 | |
7704 | /* Note that this isn't made use of if the face hasn't a box, | |
7705 | so there's no need to check the face here. */ | |
7706 | it->start_of_box_run_p = 1; | |
5f5c8ee5 GM |
7707 | |
7708 | while (it->current_x < max_x) | |
a2889657 | 7709 | { |
5f5c8ee5 | 7710 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 7711 | |
5f5c8ee5 GM |
7712 | /* Get the next display element. */ |
7713 | if (!get_next_display_element (it)) | |
7714 | break; | |
73af359d | 7715 | |
5f5c8ee5 GM |
7716 | /* Produce glyphs. */ |
7717 | x_before = it->current_x; | |
7718 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
7719 | PRODUCE_GLYPHS (it); | |
daa37602 | 7720 | |
5f5c8ee5 GM |
7721 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
7722 | i = 0; | |
7723 | x = x_before; | |
7724 | while (i < nglyphs) | |
7725 | { | |
7726 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
7727 | ||
7728 | if (x + glyph->pixel_width > max_x) | |
7729 | { | |
7730 | /* Glyph doesn't fit on line. */ | |
7731 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
7732 | it->current_x = x; | |
7733 | goto out; | |
7734 | } | |
daa37602 | 7735 | |
5f5c8ee5 GM |
7736 | ++it->hpos; |
7737 | x += glyph->pixel_width; | |
7738 | ++i; | |
7739 | } | |
7740 | ||
7741 | /* Stop at line ends. */ | |
7742 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
7743 | break; | |
7744 | ||
cafafe0b | 7745 | set_iterator_to_next (it, 1); |
a2889657 | 7746 | } |
a2889657 | 7747 | |
5f5c8ee5 | 7748 | out:; |
a2889657 | 7749 | |
5f5c8ee5 GM |
7750 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
7751 | extend_face_to_end_of_line (it); | |
7752 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
7753 | last->right_box_line_p = 1; | |
90aa2856 GM |
7754 | if (last == row->glyphs[TEXT_AREA]) |
7755 | last->left_box_line_p = 1; | |
5f5c8ee5 GM |
7756 | compute_line_metrics (it); |
7757 | ||
e037b9ec | 7758 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
7759 | if (!row->displays_text_p) |
7760 | { | |
312246d1 GM |
7761 | row->height = row->phys_height = it->last_visible_y - row->y; |
7762 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
7763 | } |
7764 | ||
7765 | row->full_width_p = 1; | |
7766 | row->continued_p = 0; | |
7767 | row->truncated_on_left_p = 0; | |
7768 | row->truncated_on_right_p = 0; | |
7769 | ||
7770 | it->current_x = it->hpos = 0; | |
7771 | it->current_y += row->height; | |
7772 | ++it->vpos; | |
7773 | ++it->glyph_row; | |
a2889657 | 7774 | } |
96a410bc | 7775 | |
5f5c8ee5 | 7776 | |
e037b9ec | 7777 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 7778 | items of frame F visible. */ |
96a410bc | 7779 | |
d39b6696 | 7780 | static int |
e037b9ec | 7781 | tool_bar_lines_needed (f) |
5f5c8ee5 | 7782 | struct frame *f; |
d39b6696 | 7783 | { |
e037b9ec | 7784 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
7785 | struct it it; |
7786 | ||
e037b9ec GM |
7787 | /* Initialize an iterator for iteration over |
7788 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
7789 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7790 | it.first_visible_x = 0; |
7791 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 7792 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
7793 | |
7794 | while (!ITERATOR_AT_END_P (&it)) | |
7795 | { | |
7796 | it.glyph_row = w->desired_matrix->rows; | |
7797 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 7798 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
7799 | } |
7800 | ||
7801 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 7802 | } |
96a410bc | 7803 | |
5f5c8ee5 | 7804 | |
57c28064 GM |
7805 | DEFUN ("tool-bar-lines-needed", Ftool_bar_lines_needed, Stool_bar_lines_needed, |
7806 | 0, 1, 0, | |
7ee72033 MB |
7807 | doc: /* Return the number of lines occupied by the tool bar of FRAME. */) |
7808 | (frame) | |
57c28064 GM |
7809 | Lisp_Object frame; |
7810 | { | |
7811 | struct frame *f; | |
7812 | struct window *w; | |
7813 | int nlines = 0; | |
7814 | ||
7815 | if (NILP (frame)) | |
7816 | frame = selected_frame; | |
7817 | else | |
b7826503 | 7818 | CHECK_FRAME (frame); |
57c28064 GM |
7819 | f = XFRAME (frame); |
7820 | ||
7821 | if (WINDOWP (f->tool_bar_window) | |
7822 | || (w = XWINDOW (f->tool_bar_window), | |
7823 | XFASTINT (w->height) > 0)) | |
7824 | { | |
7825 | update_tool_bar (f, 1); | |
7826 | if (f->n_tool_bar_items) | |
7827 | { | |
7828 | build_desired_tool_bar_string (f); | |
7829 | nlines = tool_bar_lines_needed (f); | |
7830 | } | |
7831 | } | |
7832 | ||
7833 | return make_number (nlines); | |
7834 | } | |
7835 | ||
7836 | ||
e037b9ec | 7837 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
7838 | height should be changed. */ |
7839 | ||
7840 | static int | |
e037b9ec | 7841 | redisplay_tool_bar (f) |
5f5c8ee5 | 7842 | struct frame *f; |
96a410bc | 7843 | { |
5f5c8ee5 GM |
7844 | struct window *w; |
7845 | struct it it; | |
7846 | struct glyph_row *row; | |
7847 | int change_height_p = 0; | |
7848 | ||
e037b9ec GM |
7849 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
7850 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 7851 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
7852 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
7853 | if (!WINDOWP (f->tool_bar_window) | |
7854 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
7855 | XFASTINT (w->height) == 0)) |
7856 | return 0; | |
96a410bc | 7857 | |
e037b9ec GM |
7858 | /* Set up an iterator for the tool-bar window. */ |
7859 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7860 | it.first_visible_x = 0; |
7861 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
7862 | row = it.glyph_row; | |
3450d04c | 7863 | |
e037b9ec GM |
7864 | /* Build a string that represents the contents of the tool-bar. */ |
7865 | build_desired_tool_bar_string (f); | |
7866 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 7867 | |
e037b9ec | 7868 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 7869 | while (it.current_y < it.last_visible_y) |
e037b9ec | 7870 | display_tool_bar_line (&it); |
3450d04c | 7871 | |
e037b9ec | 7872 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
7873 | window, so don't do it. */ |
7874 | w->desired_matrix->no_scrolling_p = 1; | |
7875 | w->must_be_updated_p = 1; | |
3450d04c | 7876 | |
e037b9ec | 7877 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
7878 | { |
7879 | int nlines; | |
6e33e6f0 GM |
7880 | |
7881 | /* If we couldn't display everything, change the tool-bar's | |
7882 | height. */ | |
7883 | if (IT_STRING_CHARPOS (it) < it.end_charpos) | |
7884 | change_height_p = 1; | |
5f5c8ee5 GM |
7885 | |
7886 | /* If there are blank lines at the end, except for a partially | |
7887 | visible blank line at the end that is smaller than | |
e037b9ec | 7888 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
7889 | row = it.glyph_row - 1; |
7890 | if (!row->displays_text_p | |
7891 | && row->height >= CANON_Y_UNIT (f)) | |
7892 | change_height_p = 1; | |
7893 | ||
e037b9ec GM |
7894 | /* If row displays tool-bar items, but is partially visible, |
7895 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
7896 | if (row->displays_text_p |
7897 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
7898 | change_height_p = 1; | |
7899 | ||
e037b9ec | 7900 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
7901 | frame parameter. */ |
7902 | if (change_height_p | |
e037b9ec | 7903 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
7904 | nlines != XFASTINT (w->height))) |
7905 | { | |
e037b9ec | 7906 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 | 7907 | Lisp_Object frame; |
e85ee976 | 7908 | int old_height = XFASTINT (w->height); |
5f5c8ee5 GM |
7909 | |
7910 | XSETFRAME (frame, f); | |
7911 | clear_glyph_matrix (w->desired_matrix); | |
7912 | Fmodify_frame_parameters (frame, | |
e037b9ec | 7913 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
7914 | make_number (nlines)), |
7915 | Qnil)); | |
e85ee976 GM |
7916 | if (XFASTINT (w->height) != old_height) |
7917 | fonts_changed_p = 1; | |
5f5c8ee5 GM |
7918 | } |
7919 | } | |
3450d04c | 7920 | |
5f5c8ee5 | 7921 | return change_height_p; |
96a410bc | 7922 | } |
90adcf20 | 7923 | |
5f5c8ee5 | 7924 | |
e037b9ec GM |
7925 | /* Get information about the tool-bar item which is displayed in GLYPH |
7926 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7464726e | 7927 | properties start in F->tool_bar_items. Value is zero if |
e037b9ec | 7928 | GLYPH doesn't display a tool-bar item. */ |
5f5c8ee5 GM |
7929 | |
7930 | int | |
e037b9ec | 7931 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
7932 | struct frame *f; |
7933 | struct glyph *glyph; | |
7934 | int *prop_idx; | |
90adcf20 | 7935 | { |
5f5c8ee5 GM |
7936 | Lisp_Object prop; |
7937 | int success_p; | |
be676094 GM |
7938 | int charpos; |
7939 | ||
7940 | /* This function can be called asynchronously, which means we must | |
7941 | exclude any possibility that Fget_text_property signals an | |
7942 | error. */ | |
7943 | charpos = min (XSTRING (f->current_tool_bar_string)->size, glyph->charpos); | |
7944 | charpos = max (0, charpos); | |
5f5c8ee5 GM |
7945 | |
7946 | /* Get the text property `menu-item' at pos. The value of that | |
7947 | property is the start index of this item's properties in | |
7464726e | 7948 | F->tool_bar_items. */ |
be676094 | 7949 | prop = Fget_text_property (make_number (charpos), |
e037b9ec | 7950 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
7951 | if (INTEGERP (prop)) |
7952 | { | |
7953 | *prop_idx = XINT (prop); | |
7954 | success_p = 1; | |
7955 | } | |
7956 | else | |
7957 | success_p = 0; | |
90adcf20 | 7958 | |
5f5c8ee5 GM |
7959 | return success_p; |
7960 | } | |
7961 | ||
7962 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 7963 | |
feb0c42f | 7964 | |
5f5c8ee5 GM |
7965 | \f |
7966 | /************************************************************************ | |
7967 | Horizontal scrolling | |
7968 | ************************************************************************/ | |
feb0c42f | 7969 | |
5f5c8ee5 GM |
7970 | static int hscroll_window_tree P_ ((Lisp_Object)); |
7971 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 7972 | |
5f5c8ee5 GM |
7973 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
7974 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
7975 | that it is not within a certain margin at the window's left and | |
7976 | right border. Value is non-zero if any window's hscroll has been | |
7977 | changed. */ | |
7978 | ||
7979 | static int | |
7980 | hscroll_window_tree (window) | |
7981 | Lisp_Object window; | |
7982 | { | |
7983 | int hscrolled_p = 0; | |
7984 | ||
7985 | while (WINDOWP (window)) | |
90adcf20 | 7986 | { |
5f5c8ee5 GM |
7987 | struct window *w = XWINDOW (window); |
7988 | ||
7989 | if (WINDOWP (w->hchild)) | |
7990 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
7991 | else if (WINDOWP (w->vchild)) | |
7992 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
7993 | else if (w->cursor.vpos >= 0) | |
7994 | { | |
7995 | int hscroll_margin, text_area_x, text_area_y; | |
7996 | int text_area_width, text_area_height; | |
92a90e89 GM |
7997 | struct glyph_row *current_cursor_row |
7998 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
7999 | struct glyph_row *desired_cursor_row | |
8000 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
8001 | struct glyph_row *cursor_row | |
8002 | = (desired_cursor_row->enabled_p | |
8003 | ? desired_cursor_row | |
8004 | : current_cursor_row); | |
a2725ab2 | 8005 | |
5f5c8ee5 GM |
8006 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
8007 | &text_area_width, &text_area_height); | |
90adcf20 | 8008 | |
5f5c8ee5 | 8009 | /* Scroll when cursor is inside this scroll margin. */ |
3ebf0ea9 | 8010 | /* Shouldn't we export this `5' for customization ? -stef */ |
5f5c8ee5 GM |
8011 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); |
8012 | ||
8013 | if ((XFASTINT (w->hscroll) | |
8014 | && w->cursor.x < hscroll_margin) | |
92a90e89 GM |
8015 | || (cursor_row->enabled_p |
8016 | && cursor_row->truncated_on_right_p | |
5f5c8ee5 | 8017 | && (w->cursor.x > text_area_width - hscroll_margin))) |
08b610e4 | 8018 | { |
5f5c8ee5 GM |
8019 | struct it it; |
8020 | int hscroll; | |
8021 | struct buffer *saved_current_buffer; | |
8022 | int pt; | |
8023 | ||
8024 | /* Find point in a display of infinite width. */ | |
8025 | saved_current_buffer = current_buffer; | |
8026 | current_buffer = XBUFFER (w->buffer); | |
8027 | ||
8028 | if (w == XWINDOW (selected_window)) | |
8029 | pt = BUF_PT (current_buffer); | |
8030 | else | |
08b610e4 | 8031 | { |
5f5c8ee5 GM |
8032 | pt = marker_position (w->pointm); |
8033 | pt = max (BEGV, pt); | |
8034 | pt = min (ZV, pt); | |
8035 | } | |
8036 | ||
8037 | /* Move iterator to pt starting at cursor_row->start in | |
8038 | a line with infinite width. */ | |
8039 | init_to_row_start (&it, w, cursor_row); | |
8040 | it.last_visible_x = INFINITY; | |
8041 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
8042 | current_buffer = saved_current_buffer; | |
8043 | ||
8044 | /* Center cursor in window. */ | |
8045 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
8046 | / CANON_X_UNIT (it.f)); | |
3172f70b | 8047 | hscroll = max (hscroll, XFASTINT (w->min_hscroll)); |
5f5c8ee5 GM |
8048 | |
8049 | /* Don't call Fset_window_hscroll if value hasn't | |
8050 | changed because it will prevent redisplay | |
8051 | optimizations. */ | |
8052 | if (XFASTINT (w->hscroll) != hscroll) | |
8053 | { | |
3172f70b GM |
8054 | XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1; |
8055 | w->hscroll = make_number (hscroll); | |
5f5c8ee5 | 8056 | hscrolled_p = 1; |
08b610e4 | 8057 | } |
08b610e4 | 8058 | } |
08b610e4 | 8059 | } |
a2725ab2 | 8060 | |
5f5c8ee5 | 8061 | window = w->next; |
90adcf20 | 8062 | } |
cd6dfed6 | 8063 | |
5f5c8ee5 GM |
8064 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
8065 | return hscrolled_p; | |
8066 | } | |
8067 | ||
8068 | ||
8069 | /* Set hscroll so that cursor is visible and not inside horizontal | |
8070 | scroll margins for all windows in the tree rooted at WINDOW. See | |
8071 | also hscroll_window_tree above. Value is non-zero if any window's | |
8072 | hscroll has been changed. If it has, desired matrices on the frame | |
8073 | of WINDOW are cleared. */ | |
8074 | ||
8075 | static int | |
8076 | hscroll_windows (window) | |
8077 | Lisp_Object window; | |
8078 | { | |
d475bcb8 GM |
8079 | int hscrolled_p; |
8080 | ||
8081 | if (automatic_hscrolling_p) | |
8082 | { | |
8083 | hscrolled_p = hscroll_window_tree (window); | |
8084 | if (hscrolled_p) | |
8085 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
8086 | } | |
8087 | else | |
8088 | hscrolled_p = 0; | |
5f5c8ee5 | 8089 | return hscrolled_p; |
90adcf20 | 8090 | } |
5f5c8ee5 GM |
8091 | |
8092 | ||
90adcf20 | 8093 | \f |
5f5c8ee5 GM |
8094 | /************************************************************************ |
8095 | Redisplay | |
8096 | ************************************************************************/ | |
8097 | ||
8098 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
8099 | to a non-zero value. This is sometimes handy to have in a debugger | |
8100 | session. */ | |
8101 | ||
8102 | #if GLYPH_DEBUG | |
a2889657 | 8103 | |
5f5c8ee5 GM |
8104 | /* First and last unchanged row for try_window_id. */ |
8105 | ||
8106 | int debug_first_unchanged_at_end_vpos; | |
8107 | int debug_last_unchanged_at_beg_vpos; | |
8108 | ||
8109 | /* Delta vpos and y. */ | |
8110 | ||
8111 | int debug_dvpos, debug_dy; | |
8112 | ||
8113 | /* Delta in characters and bytes for try_window_id. */ | |
8114 | ||
8115 | int debug_delta, debug_delta_bytes; | |
8116 | ||
8117 | /* Values of window_end_pos and window_end_vpos at the end of | |
8118 | try_window_id. */ | |
8119 | ||
8120 | int debug_end_pos, debug_end_vpos; | |
8121 | ||
8122 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
8123 | format string. A1...A9 are a supplement for a variable-length | |
8124 | argument list. If trace_redisplay_p is non-zero also printf the | |
8125 | resulting string to stderr. */ | |
8126 | ||
8127 | static void | |
8128 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
8129 | struct window *w; | |
8130 | char *fmt; | |
8131 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
8132 | { | |
8133 | char buffer[512]; | |
8134 | char *method = w->desired_matrix->method; | |
8135 | int len = strlen (method); | |
8136 | int size = sizeof w->desired_matrix->method; | |
8137 | int remaining = size - len - 1; | |
8138 | ||
8139 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
8140 | if (len && remaining) | |
8141 | { | |
8142 | method[len] = '|'; | |
8143 | --remaining, ++len; | |
8144 | } | |
8145 | ||
8146 | strncpy (method + len, buffer, remaining); | |
8147 | ||
8148 | if (trace_redisplay_p) | |
8149 | fprintf (stderr, "%p (%s): %s\n", | |
8150 | w, | |
8151 | ((BUFFERP (w->buffer) | |
8152 | && STRINGP (XBUFFER (w->buffer)->name)) | |
8153 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
8154 | : "no buffer"), | |
8155 | buffer); | |
8156 | } | |
a2889657 | 8157 | |
5f5c8ee5 | 8158 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 8159 | |
a2889657 | 8160 | |
5f5c8ee5 GM |
8161 | /* This counter is used to clear the face cache every once in a while |
8162 | in redisplay_internal. It is incremented for each redisplay. | |
8163 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
8164 | cleared. */ | |
0d231165 | 8165 | |
5f5c8ee5 | 8166 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
8167 | static int clear_face_cache_count; |
8168 | ||
20de20dc | 8169 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
8170 | |
8171 | static struct frame *previous_terminal_frame; | |
8172 | ||
8173 | /* Non-zero while redisplay_internal is in progress. */ | |
8174 | ||
8175 | int redisplaying_p; | |
8176 | ||
8177 | ||
8178 | /* Value is non-zero if all changes in window W, which displays | |
8179 | current_buffer, are in the text between START and END. START is a | |
8180 | buffer position, END is given as a distance from Z. Used in | |
8181 | redisplay_internal for display optimization. */ | |
8182 | ||
8183 | static INLINE int | |
8184 | text_outside_line_unchanged_p (w, start, end) | |
8185 | struct window *w; | |
8186 | int start, end; | |
8187 | { | |
8188 | int unchanged_p = 1; | |
8189 | ||
8190 | /* If text or overlays have changed, see where. */ | |
8191 | if (XFASTINT (w->last_modified) < MODIFF | |
8192 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
8193 | { | |
8194 | /* Gap in the line? */ | |
8195 | if (GPT < start || Z - GPT < end) | |
8196 | unchanged_p = 0; | |
8197 | ||
8198 | /* Changes start in front of the line, or end after it? */ | |
8199 | if (unchanged_p | |
9142dd5b GM |
8200 | && (BEG_UNCHANGED < start - 1 |
8201 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
8202 | unchanged_p = 0; |
8203 | ||
8204 | /* If selective display, can't optimize if changes start at the | |
8205 | beginning of the line. */ | |
8206 | if (unchanged_p | |
8207 | && INTEGERP (current_buffer->selective_display) | |
8208 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 8209 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 | 8210 | unchanged_p = 0; |
47d57b22 GM |
8211 | |
8212 | /* If there are overlays at the start or end of the line, these | |
8213 | may have overlay strings with newlines in them. A change at | |
8214 | START, for instance, may actually concern the display of such | |
8215 | overlay strings as well, and they are displayed on different | |
8216 | lines. So, quickly rule out this case. (For the future, it | |
8217 | might be desirable to implement something more telling than | |
8218 | just BEG/END_UNCHANGED.) */ | |
8219 | if (unchanged_p) | |
8220 | { | |
8221 | if (BEG + BEG_UNCHANGED == start | |
8222 | && overlay_touches_p (start)) | |
8223 | unchanged_p = 0; | |
8224 | if (END_UNCHANGED == end | |
8225 | && overlay_touches_p (Z - end)) | |
8226 | unchanged_p = 0; | |
8227 | } | |
5f5c8ee5 GM |
8228 | } |
8229 | ||
8230 | return unchanged_p; | |
8231 | } | |
8232 | ||
8233 | ||
8234 | /* Do a frame update, taking possible shortcuts into account. This is | |
8235 | the main external entry point for redisplay. | |
8236 | ||
8237 | If the last redisplay displayed an echo area message and that message | |
8238 | is no longer requested, we clear the echo area or bring back the | |
8239 | mini-buffer if that is in use. */ | |
20de20dc | 8240 | |
a2889657 JB |
8241 | void |
8242 | redisplay () | |
e9874cee RS |
8243 | { |
8244 | redisplay_internal (0); | |
8245 | } | |
8246 | ||
47d57b22 | 8247 | |
260a86a0 KH |
8248 | /* Return 1 if point moved out of or into a composition. Otherwise |
8249 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
8250 | position. BUF and PT are the current point buffer and position. */ | |
8251 | ||
8252 | int | |
8253 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
8254 | struct buffer *prev_buf, *buf; | |
8255 | int prev_pt, pt; | |
8256 | { | |
8257 | int start, end; | |
8258 | Lisp_Object prop; | |
8259 | Lisp_Object buffer; | |
8260 | ||
8261 | XSETBUFFER (buffer, buf); | |
8262 | /* Check a composition at the last point if point moved within the | |
8263 | same buffer. */ | |
8264 | if (prev_buf == buf) | |
8265 | { | |
8266 | if (prev_pt == pt) | |
8267 | /* Point didn't move. */ | |
8268 | return 0; | |
8269 | ||
8270 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) | |
8271 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
8272 | && COMPOSITION_VALID_P (start, end, prop) | |
8273 | && start < prev_pt && end > prev_pt) | |
8274 | /* The last point was within the composition. Return 1 iff | |
8275 | point moved out of the composition. */ | |
8276 | return (pt <= start || pt >= end); | |
8277 | } | |
8278 | ||
8279 | /* Check a composition at the current point. */ | |
8280 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
8281 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
8282 | && COMPOSITION_VALID_P (start, end, prop) | |
8283 | && start < pt && end > pt); | |
8284 | } | |
5f5c8ee5 | 8285 | |
47d57b22 | 8286 | |
9142dd5b GM |
8287 | /* Reconsider the setting of B->clip_changed which is displayed |
8288 | in window W. */ | |
8289 | ||
8290 | static INLINE void | |
8291 | reconsider_clip_changes (w, b) | |
8292 | struct window *w; | |
8293 | struct buffer *b; | |
8294 | { | |
8295 | if (b->prevent_redisplay_optimizations_p) | |
8296 | b->clip_changed = 1; | |
8297 | else if (b->clip_changed | |
8298 | && !NILP (w->window_end_valid) | |
8299 | && w->current_matrix->buffer == b | |
8300 | && w->current_matrix->zv == BUF_ZV (b) | |
8301 | && w->current_matrix->begv == BUF_BEGV (b)) | |
8302 | b->clip_changed = 0; | |
260a86a0 KH |
8303 | |
8304 | /* If display wasn't paused, and W is not a tool bar window, see if | |
8305 | point has been moved into or out of a composition. In that case, | |
8306 | we set b->clip_changed to 1 to force updating the screen. If | |
8307 | b->clip_changed has already been set to 1, we can skip this | |
8308 | check. */ | |
8309 | if (!b->clip_changed | |
8310 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
8311 | { | |
8312 | int pt; | |
8313 | ||
8314 | if (w == XWINDOW (selected_window)) | |
8315 | pt = BUF_PT (current_buffer); | |
8316 | else | |
8317 | pt = marker_position (w->pointm); | |
8318 | ||
8319 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 8320 | || pt != XINT (w->last_point)) |
260a86a0 | 8321 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 8322 | XINT (w->last_point), |
260a86a0 KH |
8323 | XBUFFER (w->buffer), pt)) |
8324 | b->clip_changed = 1; | |
8325 | } | |
9142dd5b GM |
8326 | } |
8327 | ||
8328 | ||
5f5c8ee5 GM |
8329 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
8330 | response to any user action; therefore, we should preserve the echo | |
8331 | area. (Actually, our caller does that job.) Perhaps in the future | |
8332 | avoid recentering windows if it is not necessary; currently that | |
8333 | causes some problems. */ | |
e9874cee RS |
8334 | |
8335 | static void | |
8336 | redisplay_internal (preserve_echo_area) | |
8337 | int preserve_echo_area; | |
a2889657 | 8338 | { |
5f5c8ee5 GM |
8339 | struct window *w = XWINDOW (selected_window); |
8340 | struct frame *f = XFRAME (w->frame); | |
8341 | int pause; | |
a2889657 | 8342 | int must_finish = 0; |
5f5c8ee5 | 8343 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 8344 | int number_of_visible_frames; |
28514cd9 | 8345 | int count; |
886bd6f2 | 8346 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 8347 | |
5f5c8ee5 GM |
8348 | /* Non-zero means redisplay has to consider all windows on all |
8349 | frames. Zero means, only selected_window is considered. */ | |
8350 | int consider_all_windows_p; | |
8351 | ||
8352 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
8353 | ||
8354 | /* No redisplay if running in batch mode or frame is not yet fully | |
8355 | initialized, or redisplay is explicitly turned off by setting | |
8356 | Vinhibit_redisplay. */ | |
8357 | if (noninteractive | |
8358 | || !NILP (Vinhibit_redisplay) | |
8359 | || !f->glyphs_initialized_p) | |
a2889657 JB |
8360 | return; |
8361 | ||
5f5c8ee5 GM |
8362 | /* The flag redisplay_performed_directly_p is set by |
8363 | direct_output_for_insert when it already did the whole screen | |
8364 | update necessary. */ | |
8365 | if (redisplay_performed_directly_p) | |
8366 | { | |
8367 | redisplay_performed_directly_p = 0; | |
8368 | if (!hscroll_windows (selected_window)) | |
8369 | return; | |
8370 | } | |
8371 | ||
15f0cf78 RS |
8372 | #ifdef USE_X_TOOLKIT |
8373 | if (popup_activated ()) | |
8374 | return; | |
8375 | #endif | |
8376 | ||
28514cd9 | 8377 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 8378 | if (redisplaying_p) |
735c094c KH |
8379 | return; |
8380 | ||
28514cd9 GM |
8381 | /* Record a function that resets redisplaying_p to its old value |
8382 | when we leave this function. */ | |
2d27dae2 | 8383 | count = BINDING_STACK_SIZE (); |
28514cd9 GM |
8384 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); |
8385 | ++redisplaying_p; | |
8386 | ||
8b32d885 | 8387 | retry: |
bd9d0f3f | 8388 | pause = 0; |
9142dd5b GM |
8389 | reconsider_clip_changes (w, current_buffer); |
8390 | ||
5f5c8ee5 GM |
8391 | /* If new fonts have been loaded that make a glyph matrix adjustment |
8392 | necessary, do it. */ | |
8393 | if (fonts_changed_p) | |
8394 | { | |
8395 | adjust_glyphs (NULL); | |
8396 | ++windows_or_buffers_changed; | |
8397 | fonts_changed_p = 0; | |
8398 | } | |
8399 | ||
6961e0c1 GM |
8400 | /* If face_change_count is non-zero, init_iterator will free all |
8401 | realized faces, which includes the faces referenced from current | |
8402 | matrices. So, we can't reuse current matrices in this case. */ | |
8403 | if (face_change_count) | |
8404 | ++windows_or_buffers_changed; | |
8405 | ||
886bd6f2 GM |
8406 | if (! FRAME_WINDOW_P (sf) |
8407 | && previous_terminal_frame != sf) | |
20de20dc | 8408 | { |
5f5c8ee5 GM |
8409 | /* Since frames on an ASCII terminal share the same display |
8410 | area, displaying a different frame means redisplay the whole | |
8411 | thing. */ | |
20de20dc | 8412 | windows_or_buffers_changed++; |
886bd6f2 GM |
8413 | SET_FRAME_GARBAGED (sf); |
8414 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 8415 | } |
886bd6f2 | 8416 | previous_terminal_frame = sf; |
20de20dc | 8417 | |
5f5c8ee5 GM |
8418 | /* Set the visible flags for all frames. Do this before checking |
8419 | for resized or garbaged frames; they want to know if their frames | |
8420 | are visible. See the comment in frame.h for | |
8421 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 8422 | { |
35f56f96 | 8423 | Lisp_Object tail, frame; |
d724d989 | 8424 | |
89819bdd RS |
8425 | number_of_visible_frames = 0; |
8426 | ||
35f56f96 | 8427 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 8428 | { |
5f5c8ee5 GM |
8429 | struct frame *f = XFRAME (frame); |
8430 | ||
8431 | FRAME_SAMPLE_VISIBILITY (f); | |
8432 | if (FRAME_VISIBLE_P (f)) | |
8433 | ++number_of_visible_frames; | |
8434 | clear_desired_matrices (f); | |
f82aff7c | 8435 | } |
d724d989 JB |
8436 | } |
8437 | ||
44fa5b1e | 8438 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 8439 | do_pending_window_change (1); |
a2889657 | 8440 | |
5f5c8ee5 | 8441 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 8442 | if (frame_garbaged) |
c6e89d6c | 8443 | clear_garbaged_frames (); |
a2889657 | 8444 | |
e037b9ec | 8445 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
8446 | prepare_menu_bars (); |
8447 | ||
28995e67 | 8448 | if (windows_or_buffers_changed) |
a2889657 JB |
8449 | update_mode_lines++; |
8450 | ||
538f13d4 RS |
8451 | /* Detect case that we need to write or remove a star in the mode line. */ |
8452 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
8453 | { |
8454 | w->update_mode_line = Qt; | |
8455 | if (buffer_shared > 1) | |
8456 | update_mode_lines++; | |
8457 | } | |
8458 | ||
5f5c8ee5 | 8459 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
8460 | if (!NILP (w->column_number_displayed) |
8461 | /* This alternative quickly identifies a common case | |
8462 | where no change is needed. */ | |
8463 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8464 | && XFASTINT (w->last_modified) >= MODIFF |
8465 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8466 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8467 | w->update_mode_line = Qt; | |
8468 | ||
44fa5b1e | 8469 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 8470 | |
5f5c8ee5 GM |
8471 | /* The variable buffer_shared is set in redisplay_window and |
8472 | indicates that we redisplay a buffer in different windows. See | |
8473 | there. */ | |
8474 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
8475 | |
8476 | /* If specs for an arrow have changed, do thorough redisplay | |
8477 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 8478 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 8479 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 8480 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 8481 | |
90adcf20 RS |
8482 | /* Normally the message* functions will have already displayed and |
8483 | updated the echo area, but the frame may have been trashed, or | |
8484 | the update may have been preempted, so display the echo area | |
6e019995 | 8485 | again here. Checking message_cleared_p captures the case that |
c6e89d6c | 8486 | the echo area should be cleared. */ |
96d5e9a0 GM |
8487 | if ((!NILP (echo_area_buffer[0]) && !display_last_displayed_message_p) |
8488 | || (!NILP (echo_area_buffer[1]) && display_last_displayed_message_p) | |
3fa69ee7 GM |
8489 | || (message_cleared_p |
8490 | && minibuf_level == 0 | |
8491 | /* If the mini-window is currently selected, this means the | |
8492 | echo-area doesn't show through. */ | |
8493 | && !MINI_WINDOW_P (XWINDOW (selected_window)))) | |
90adcf20 | 8494 | { |
c6e89d6c | 8495 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 8496 | must_finish = 1; |
6e019995 GM |
8497 | |
8498 | /* If we don't display the current message, don't clear the | |
8499 | message_cleared_p flag, because, if we did, we wouldn't clear | |
8500 | the echo area in the next redisplay which doesn't preserve | |
8501 | the echo area. */ | |
8502 | if (!display_last_displayed_message_p) | |
8503 | message_cleared_p = 0; | |
dd2eb166 | 8504 | |
c6e89d6c GM |
8505 | if (fonts_changed_p) |
8506 | goto retry; | |
8507 | else if (window_height_changed_p) | |
8508 | { | |
8509 | consider_all_windows_p = 1; | |
8510 | ++update_mode_lines; | |
8511 | ++windows_or_buffers_changed; | |
9142dd5b GM |
8512 | |
8513 | /* If window configuration was changed, frames may have been | |
8514 | marked garbaged. Clear them or we will experience | |
8515 | surprises wrt scrolling. */ | |
8516 | if (frame_garbaged) | |
8517 | clear_garbaged_frames (); | |
c6e89d6c | 8518 | } |
90adcf20 | 8519 | } |
97a36635 | 8520 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
8521 | && (current_buffer->clip_changed |
8522 | || XFASTINT (w->last_modified) < MODIFF | |
8523 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 8524 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
8525 | { |
8526 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
8527 | showing if its contents might have changed. */ |
8528 | must_finish = 1; | |
8529 | consider_all_windows_p = 1; | |
c6e89d6c | 8530 | ++windows_or_buffers_changed; |
dd2eb166 | 8531 | ++update_mode_lines; |
9142dd5b GM |
8532 | |
8533 | /* If window configuration was changed, frames may have been | |
8534 | marked garbaged. Clear them or we will experience | |
8535 | surprises wrt scrolling. */ | |
8536 | if (frame_garbaged) | |
8537 | clear_garbaged_frames (); | |
c6e89d6c GM |
8538 | } |
8539 | ||
90adcf20 | 8540 | |
5f5c8ee5 GM |
8541 | /* If showing the region, and mark has changed, we must redisplay |
8542 | the whole window. The assignment to this_line_start_pos prevents | |
8543 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
8544 | if (((!NILP (Vtransient_mark_mode) |
8545 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
8546 | != !NILP (w->region_showing)) | |
82d04750 JB |
8547 | || (!NILP (w->region_showing) |
8548 | && !EQ (w->region_showing, | |
8549 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
8550 | CHARPOS (this_line_start_pos) = 0; |
8551 | ||
8552 | /* Optimize the case that only the line containing the cursor in the | |
8553 | selected window has changed. Variables starting with this_ are | |
8554 | set in display_line and record information about the line | |
8555 | containing the cursor. */ | |
8556 | tlbufpos = this_line_start_pos; | |
8557 | tlendpos = this_line_end_pos; | |
8558 | if (!consider_all_windows_p | |
8559 | && CHARPOS (tlbufpos) > 0 | |
8560 | && NILP (w->update_mode_line) | |
73af359d | 8561 | && !current_buffer->clip_changed |
44fa5b1e | 8562 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 8563 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 8564 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
8565 | && this_line_buffer == current_buffer |
8566 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 8567 | && NILP (w->force_start) |
5f5c8ee5 GM |
8568 | /* Point must be on the line that we have info recorded about. */ |
8569 | && PT >= CHARPOS (tlbufpos) | |
8570 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
8571 | /* All text outside that line, including its final newline, |
8572 | must be unchanged */ | |
5f5c8ee5 GM |
8573 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
8574 | CHARPOS (tlendpos))) | |
8575 | { | |
8576 | if (CHARPOS (tlbufpos) > BEGV | |
8577 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
8578 | && (CHARPOS (tlbufpos) == ZV | |
8579 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
8580 | /* Former continuation line has disappeared by becoming empty */ |
8581 | goto cancel; | |
8582 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 8583 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
8584 | || MINI_WINDOW_P (w)) |
8585 | { | |
1c9241f5 KH |
8586 | /* We have to handle the case of continuation around a |
8587 | wide-column character (See the comment in indent.c around | |
8588 | line 885). | |
8589 | ||
8590 | For instance, in the following case: | |
8591 | ||
8592 | -------- Insert -------- | |
8593 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
8594 | J_I_ ==> J_I_ `^^' are cursors. | |
8595 | ^^ ^^ | |
8596 | -------- -------- | |
8597 | ||
8598 | As we have to redraw the line above, we should goto cancel. */ | |
8599 | ||
5f5c8ee5 GM |
8600 | struct it it; |
8601 | int line_height_before = this_line_pixel_height; | |
8602 | ||
8603 | /* Note that start_display will handle the case that the | |
8604 | line starting at tlbufpos is a continuation lines. */ | |
8605 | start_display (&it, w, tlbufpos); | |
8606 | ||
8607 | /* Implementation note: It this still necessary? */ | |
8608 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
8609 | goto cancel; |
8610 | ||
5f5c8ee5 GM |
8611 | TRACE ((stderr, "trying display optimization 1\n")); |
8612 | w->cursor.vpos = -1; | |
a2889657 | 8613 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
8614 | it.vpos = this_line_vpos; |
8615 | it.current_y = this_line_y; | |
8616 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
8617 | display_line (&it); | |
8618 | ||
a2889657 | 8619 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
8620 | and ends at same distance from eob as before, we win */ |
8621 | if (w->cursor.vpos >= 0 | |
8622 | /* Line is not continued, otherwise this_line_start_pos | |
8623 | would have been set to 0 in display_line. */ | |
8624 | && CHARPOS (this_line_start_pos) | |
8625 | /* Line ends as before. */ | |
8626 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
8627 | /* Line has same height as before. Otherwise other lines | |
8628 | would have to be shifted up or down. */ | |
8629 | && this_line_pixel_height == line_height_before) | |
a2889657 | 8630 | { |
5f5c8ee5 GM |
8631 | /* If this is not the window's last line, we must adjust |
8632 | the charstarts of the lines below. */ | |
8633 | if (it.current_y < it.last_visible_y) | |
8634 | { | |
8635 | struct glyph_row *row | |
8636 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
8637 | int delta, delta_bytes; | |
8638 | ||
8639 | if (Z - CHARPOS (tlendpos) == ZV) | |
8640 | { | |
8641 | /* This line ends at end of (accessible part of) | |
8642 | buffer. There is no newline to count. */ | |
8643 | delta = (Z | |
8644 | - CHARPOS (tlendpos) | |
8645 | - MATRIX_ROW_START_CHARPOS (row)); | |
8646 | delta_bytes = (Z_BYTE | |
8647 | - BYTEPOS (tlendpos) | |
8648 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8649 | } | |
8650 | else | |
8651 | { | |
8652 | /* This line ends in a newline. Must take | |
8653 | account of the newline and the rest of the | |
8654 | text that follows. */ | |
8655 | delta = (Z | |
8656 | - CHARPOS (tlendpos) | |
8657 | - MATRIX_ROW_START_CHARPOS (row)); | |
8658 | delta_bytes = (Z_BYTE | |
8659 | - BYTEPOS (tlendpos) | |
8660 | - MATRIX_ROW_START_BYTEPOS (row)); | |
8661 | } | |
8662 | ||
f2d86d7a GM |
8663 | increment_matrix_positions (w->current_matrix, |
8664 | this_line_vpos + 1, | |
8665 | w->current_matrix->nrows, | |
8666 | delta, delta_bytes); | |
85bcef6c | 8667 | } |
46db8486 | 8668 | |
5f5c8ee5 GM |
8669 | /* If this row displays text now but previously didn't, |
8670 | or vice versa, w->window_end_vpos may have to be | |
8671 | adjusted. */ | |
8672 | if ((it.glyph_row - 1)->displays_text_p) | |
8673 | { | |
8674 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
8675 | XSETINT (w->window_end_vpos, this_line_vpos); | |
8676 | } | |
8677 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
8678 | && this_line_vpos > 0) | |
8679 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
8680 | w->window_end_valid = Qnil; | |
8681 | ||
8682 | /* Update hint: No need to try to scroll in update_window. */ | |
8683 | w->desired_matrix->no_scrolling_p = 1; | |
8684 | ||
8685 | #if GLYPH_DEBUG | |
8686 | *w->desired_matrix->method = 0; | |
8687 | debug_method_add (w, "optimization 1"); | |
8688 | #endif | |
a2889657 JB |
8689 | goto update; |
8690 | } | |
8691 | else | |
8692 | goto cancel; | |
8693 | } | |
5f5c8ee5 GM |
8694 | else if (/* Cursor position hasn't changed. */ |
8695 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
8696 | /* Make sure the cursor was last displayed |
8697 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
8698 | && 0 <= w->cursor.vpos |
8699 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
8700 | { |
8701 | if (!must_finish) | |
8702 | { | |
c6e89d6c | 8703 | do_pending_window_change (1); |
5f5c8ee5 GM |
8704 | |
8705 | /* We used to always goto end_of_redisplay here, but this | |
8706 | isn't enough if we have a blinking cursor. */ | |
8707 | if (w->cursor_off_p == w->last_cursor_off_p) | |
8708 | goto end_of_redisplay; | |
a2889657 JB |
8709 | } |
8710 | goto update; | |
8711 | } | |
8b51f1e3 KH |
8712 | /* If highlighting the region, or if the cursor is in the echo area, |
8713 | then we can't just move the cursor. */ | |
bd66d1ba RS |
8714 | else if (! (!NILP (Vtransient_mark_mode) |
8715 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 8716 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 8717 | || highlight_nonselected_windows) |
8b51f1e3 | 8718 | && NILP (w->region_showing) |
8f897821 | 8719 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 8720 | && !cursor_in_echo_area) |
a2889657 | 8721 | { |
5f5c8ee5 GM |
8722 | struct it it; |
8723 | struct glyph_row *row; | |
8724 | ||
8725 | /* Skip from tlbufpos to PT and see where it is. Note that | |
8726 | PT may be in invisible text. If so, we will end at the | |
8727 | next visible position. */ | |
8728 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
8729 | NULL, DEFAULT_FACE_ID); | |
8730 | it.current_x = this_line_start_x; | |
8731 | it.current_y = this_line_y; | |
8732 | it.vpos = this_line_vpos; | |
8733 | ||
8734 | /* The call to move_it_to stops in front of PT, but | |
8735 | moves over before-strings. */ | |
8736 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
8737 | ||
8738 | if (it.vpos == this_line_vpos | |
8739 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
8740 | row->enabled_p)) | |
a2889657 | 8741 | { |
5f5c8ee5 GM |
8742 | xassert (this_line_vpos == it.vpos); |
8743 | xassert (this_line_y == it.current_y); | |
8744 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
ade0bee1 GM |
8745 | #if GLYPH_DEBUG |
8746 | *w->desired_matrix->method = 0; | |
8747 | debug_method_add (w, "optimization 3"); | |
8748 | #endif | |
a2889657 JB |
8749 | goto update; |
8750 | } | |
8751 | else | |
8752 | goto cancel; | |
8753 | } | |
5f5c8ee5 | 8754 | |
a2889657 | 8755 | cancel: |
5f5c8ee5 GM |
8756 | /* Text changed drastically or point moved off of line. */ |
8757 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
8758 | } |
8759 | ||
5f5c8ee5 GM |
8760 | CHARPOS (this_line_start_pos) = 0; |
8761 | consider_all_windows_p |= buffer_shared > 1; | |
8762 | ++clear_face_cache_count; | |
a2889657 | 8763 | |
5f5c8ee5 | 8764 | |
bd9d0f3f GM |
8765 | /* Build desired matrices, and update the display. If |
8766 | consider_all_windows_p is non-zero, do it for all windows on all | |
8767 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 8768 | |
5f5c8ee5 | 8769 | if (consider_all_windows_p) |
a2889657 | 8770 | { |
35f56f96 | 8771 | Lisp_Object tail, frame; |
0528abe1 GM |
8772 | int i, n = 0, size = 50; |
8773 | struct frame **updated | |
8774 | = (struct frame **) alloca (size * sizeof *updated); | |
a2889657 | 8775 | |
5f5c8ee5 GM |
8776 | /* Clear the face cache eventually. */ |
8777 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 8778 | { |
5f5c8ee5 | 8779 | clear_face_cache (0); |
463f6b91 RS |
8780 | clear_face_cache_count = 0; |
8781 | } | |
31b24551 | 8782 | |
5f5c8ee5 GM |
8783 | /* Recompute # windows showing selected buffer. This will be |
8784 | incremented each time such a window is displayed. */ | |
a2889657 JB |
8785 | buffer_shared = 0; |
8786 | ||
35f56f96 | 8787 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 8788 | { |
5f5c8ee5 | 8789 | struct frame *f = XFRAME (frame); |
bd9d0f3f | 8790 | |
886bd6f2 | 8791 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 8792 | { |
5f5c8ee5 GM |
8793 | /* Mark all the scroll bars to be removed; we'll redeem |
8794 | the ones we want when we redisplay their windows. */ | |
9769686d | 8795 | if (condemn_scroll_bars_hook) |
504454e8 | 8796 | condemn_scroll_bars_hook (f); |
30c566e4 | 8797 | |
f21ef775 | 8798 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 8799 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 8800 | |
5f5c8ee5 GM |
8801 | /* Any scroll bars which redisplay_windows should have |
8802 | nuked should now go away. */ | |
9769686d | 8803 | if (judge_scroll_bars_hook) |
504454e8 | 8804 | judge_scroll_bars_hook (f); |
bd9d0f3f GM |
8805 | |
8806 | /* If fonts changed, display again. */ | |
8807 | if (fonts_changed_p) | |
8808 | goto retry; | |
8809 | ||
8810 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) | |
8811 | { | |
8812 | /* See if we have to hscroll. */ | |
8813 | if (hscroll_windows (f->root_window)) | |
8814 | goto retry; | |
8815 | ||
8816 | /* Prevent various kinds of signals during display | |
8817 | update. stdio is not robust about handling | |
8818 | signals, which can cause an apparent I/O | |
8819 | error. */ | |
8820 | if (interrupt_input) | |
8821 | unrequest_sigio (); | |
8822 | stop_polling (); | |
8823 | ||
8824 | /* Update the display. */ | |
8825 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
8826 | pause |= update_frame (f, 0, 0); | |
8827 | if (pause) | |
8828 | break; | |
8829 | ||
0528abe1 GM |
8830 | if (n == size) |
8831 | { | |
8832 | int nbytes = size * sizeof *updated; | |
8833 | struct frame **p = (struct frame **) alloca (2 * nbytes); | |
8834 | bcopy (updated, p, nbytes); | |
8835 | size *= 2; | |
8836 | } | |
8837 | ||
8838 | updated[n++] = f; | |
bd9d0f3f | 8839 | } |
9769686d | 8840 | } |
30c566e4 | 8841 | } |
0528abe1 GM |
8842 | |
8843 | /* Do the mark_window_display_accurate after all windows have | |
8844 | been redisplayed because this call resets flags in buffers | |
8845 | which are needed for proper redisplay. */ | |
8846 | for (i = 0; i < n; ++i) | |
8847 | { | |
8848 | struct frame *f = updated[i]; | |
8849 | mark_window_display_accurate (f->root_window, 1); | |
8850 | if (frame_up_to_date_hook) | |
8851 | frame_up_to_date_hook (f); | |
8852 | } | |
a2889657 | 8853 | } |
bd9d0f3f GM |
8854 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
8855 | { | |
8856 | Lisp_Object mini_window; | |
8857 | struct frame *mini_frame; | |
5f5c8ee5 | 8858 | |
bd9d0f3f | 8859 | redisplay_window (selected_window, 1); |
5f5c8ee5 | 8860 | |
bd9d0f3f GM |
8861 | /* Compare desired and current matrices, perform output. */ |
8862 | update: | |
5f5c8ee5 | 8863 | |
bd9d0f3f GM |
8864 | /* If fonts changed, display again. */ |
8865 | if (fonts_changed_p) | |
92a90e89 | 8866 | goto retry; |
a2889657 | 8867 | |
bd9d0f3f GM |
8868 | /* Prevent various kinds of signals during display update. |
8869 | stdio is not robust about handling signals, | |
8870 | which can cause an apparent I/O error. */ | |
8871 | if (interrupt_input) | |
8872 | unrequest_sigio (); | |
8873 | stop_polling (); | |
1af9f229 | 8874 | |
bd9d0f3f | 8875 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 8876 | { |
92a90e89 GM |
8877 | if (hscroll_windows (selected_window)) |
8878 | goto retry; | |
8879 | ||
5f5c8ee5 | 8880 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 8881 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 8882 | } |
d724d989 | 8883 | |
8de2d90b | 8884 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
8885 | function. If the echo area is on another frame, that may |
8886 | have put text on a frame other than the selected one, so the | |
8887 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 8888 | it here. */ |
bd9d0f3f GM |
8889 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
8890 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 8891 | |
bd9d0f3f GM |
8892 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
8893 | { | |
8894 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
8895 | pause |= update_frame (mini_frame, 0, 0); | |
8896 | if (!pause && hscroll_windows (mini_window)) | |
8897 | goto retry; | |
8898 | } | |
6e8290aa | 8899 | } |
a2889657 | 8900 | |
5f5c8ee5 GM |
8901 | /* If display was paused because of pending input, make sure we do a |
8902 | thorough update the next time. */ | |
a2889657 JB |
8903 | if (pause) |
8904 | { | |
5f5c8ee5 GM |
8905 | /* Prevent the optimization at the beginning of |
8906 | redisplay_internal that tries a single-line update of the | |
8907 | line containing the cursor in the selected window. */ | |
8908 | CHARPOS (this_line_start_pos) = 0; | |
8909 | ||
8910 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 8911 | if (!NILP (last_arrow_position)) |
a2889657 JB |
8912 | { |
8913 | last_arrow_position = Qt; | |
8914 | last_arrow_string = Qt; | |
8915 | } | |
5f5c8ee5 GM |
8916 | |
8917 | /* If we pause after scrolling, some rows in the current | |
8918 | matrices of some windows are not valid. */ | |
8919 | if (!WINDOW_FULL_WIDTH_P (w) | |
8920 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
8921 | update_mode_lines = 1; |
8922 | } | |
43c09969 | 8923 | else |
a2889657 | 8924 | { |
43c09969 | 8925 | if (!consider_all_windows_p) |
a2889657 | 8926 | { |
43c09969 GM |
8927 | /* This has already been done above if |
8928 | consider_all_windows_p is set. */ | |
8929 | mark_window_display_accurate_1 (w, 1); | |
927c5b3b GM |
8930 | |
8931 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); | |
8932 | last_arrow_string = Voverlay_arrow_string; | |
8933 | ||
efc63ef0 | 8934 | if (frame_up_to_date_hook != 0) |
43c09969 | 8935 | frame_up_to_date_hook (sf); |
a2889657 | 8936 | } |
15e26c76 | 8937 | |
a2889657 JB |
8938 | update_mode_lines = 0; |
8939 | windows_or_buffers_changed = 0; | |
8940 | } | |
8941 | ||
5f5c8ee5 GM |
8942 | /* Start SIGIO interrupts coming again. Having them off during the |
8943 | code above makes it less likely one will discard output, but not | |
8944 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 8945 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
8946 | if (interrupt_input) |
8947 | request_sigio (); | |
8948 | start_polling (); | |
8949 | ||
5f5c8ee5 GM |
8950 | /* If a frame has become visible which was not before, redisplay |
8951 | again, so that we display it. Expose events for such a frame | |
8952 | (which it gets when becoming visible) don't call the parts of | |
8953 | redisplay constructing glyphs, so simply exposing a frame won't | |
8954 | display anything in this case. So, we have to display these | |
8955 | frames here explicitly. */ | |
11c52c4f RS |
8956 | if (!pause) |
8957 | { | |
8958 | Lisp_Object tail, frame; | |
8959 | int new_count = 0; | |
8960 | ||
8961 | FOR_EACH_FRAME (tail, frame) | |
8962 | { | |
8963 | int this_is_visible = 0; | |
8e83f802 RS |
8964 | |
8965 | if (XFRAME (frame)->visible) | |
8966 | this_is_visible = 1; | |
8967 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
8968 | if (XFRAME (frame)->visible) | |
8969 | this_is_visible = 1; | |
11c52c4f RS |
8970 | |
8971 | if (this_is_visible) | |
8972 | new_count++; | |
8973 | } | |
8974 | ||
89819bdd | 8975 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
8976 | windows_or_buffers_changed++; |
8977 | } | |
8978 | ||
44fa5b1e | 8979 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 8980 | do_pending_window_change (1); |
d8e242fd | 8981 | |
8b32d885 RS |
8982 | /* If we just did a pending size change, or have additional |
8983 | visible frames, redisplay again. */ | |
3c8c72e0 | 8984 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 8985 | goto retry; |
5f5c8ee5 GM |
8986 | |
8987 | end_of_redisplay:; | |
c6e89d6c | 8988 | |
28514cd9 | 8989 | unbind_to (count, Qnil); |
a2889657 JB |
8990 | } |
8991 | ||
5f5c8ee5 GM |
8992 | |
8993 | /* Redisplay, but leave alone any recent echo area message unless | |
8994 | another message has been requested in its place. | |
a2889657 JB |
8995 | |
8996 | This is useful in situations where you need to redisplay but no | |
8997 | user action has occurred, making it inappropriate for the message | |
8998 | area to be cleared. See tracking_off and | |
9bf76936 GM |
8999 | wait_reading_process_input for examples of these situations. |
9000 | ||
9001 | FROM_WHERE is an integer saying from where this function was | |
9002 | called. This is useful for debugging. */ | |
a2889657 | 9003 | |
8991bb31 | 9004 | void |
9bf76936 GM |
9005 | redisplay_preserve_echo_area (from_where) |
9006 | int from_where; | |
a2889657 | 9007 | { |
9bf76936 GM |
9008 | TRACE ((stderr, "redisplay_preserve_echo_area (%d)\n", from_where)); |
9009 | ||
c6e89d6c | 9010 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 9011 | { |
c6e89d6c GM |
9012 | /* We have a previously displayed message, but no current |
9013 | message. Redisplay the previous message. */ | |
9014 | display_last_displayed_message_p = 1; | |
e9874cee | 9015 | redisplay_internal (1); |
c6e89d6c | 9016 | display_last_displayed_message_p = 0; |
a2889657 JB |
9017 | } |
9018 | else | |
e9874cee | 9019 | redisplay_internal (1); |
a2889657 JB |
9020 | } |
9021 | ||
5f5c8ee5 | 9022 | |
28514cd9 GM |
9023 | /* Function registered with record_unwind_protect in |
9024 | redisplay_internal. Clears the flag indicating that a redisplay is | |
9025 | in progress. */ | |
9026 | ||
9027 | static Lisp_Object | |
9028 | unwind_redisplay (old_redisplaying_p) | |
9029 | Lisp_Object old_redisplaying_p; | |
9030 | { | |
9031 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 9032 | return Qnil; |
28514cd9 GM |
9033 | } |
9034 | ||
9035 | ||
43c09969 GM |
9036 | /* Mark the display of window W as accurate or inaccurate. If |
9037 | ACCURATE_P is non-zero mark display of W as accurate. If | |
9038 | ACCURATE_P is zero, arrange for W to be redisplayed the next time | |
9039 | redisplay_internal is called. */ | |
5f5c8ee5 | 9040 | |
43c09969 GM |
9041 | static void |
9042 | mark_window_display_accurate_1 (w, accurate_p) | |
9043 | struct window *w; | |
5f5c8ee5 | 9044 | int accurate_p; |
a2889657 | 9045 | { |
43c09969 | 9046 | if (BUFFERP (w->buffer)) |
a2889657 | 9047 | { |
43c09969 GM |
9048 | struct buffer *b = XBUFFER (w->buffer); |
9049 | ||
9050 | w->last_modified | |
9051 | = make_number (accurate_p ? BUF_MODIFF (b) : 0); | |
9052 | w->last_overlay_modified | |
9053 | = make_number (accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); | |
9054 | w->last_had_star | |
9055 | = BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? Qt : Qnil; | |
a2889657 | 9056 | |
43c09969 | 9057 | if (accurate_p) |
bd66d1ba | 9058 | { |
43c09969 GM |
9059 | b->clip_changed = 0; |
9060 | b->prevent_redisplay_optimizations_p = 0; | |
9061 | ||
9062 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); | |
9063 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
9064 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
9065 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
5f5c8ee5 | 9066 | |
43c09969 GM |
9067 | w->current_matrix->buffer = b; |
9068 | w->current_matrix->begv = BUF_BEGV (b); | |
9069 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 | 9070 | |
43c09969 GM |
9071 | w->last_cursor = w->cursor; |
9072 | w->last_cursor_off_p = w->cursor_off_p; | |
9073 | ||
9074 | if (w == XWINDOW (selected_window)) | |
9075 | w->last_point = make_number (BUF_PT (b)); | |
9076 | else | |
9077 | w->last_point = make_number (XMARKER (w->pointm)->charpos); | |
bd66d1ba | 9078 | } |
43c09969 | 9079 | } |
bd66d1ba | 9080 | |
43c09969 GM |
9081 | if (accurate_p) |
9082 | { | |
d2f84654 | 9083 | w->window_end_valid = w->buffer; |
99332eb6 | 9084 | #if 0 /* This is incorrect with variable-height lines. */ |
2913a9c0 GM |
9085 | xassert (XINT (w->window_end_vpos) |
9086 | < (XINT (w->height) | |
9087 | - (WINDOW_WANTS_MODELINE_P (w) ? 1 : 0))); | |
99332eb6 | 9088 | #endif |
a2889657 | 9089 | w->update_mode_line = Qnil; |
43c09969 GM |
9090 | } |
9091 | } | |
9092 | ||
9093 | ||
9094 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
9095 | accurate or inaccurate. If ACCURATE_P is non-zero mark display of | |
9096 | windows as accurate. If ACCURATE_P is zero, arrange for windows to | |
9097 | be redisplayed the next time redisplay_internal is called. */ | |
9098 | ||
9099 | void | |
9100 | mark_window_display_accurate (window, accurate_p) | |
9101 | Lisp_Object window; | |
9102 | int accurate_p; | |
9103 | { | |
9104 | struct window *w; | |
9105 | ||
9106 | for (; !NILP (window); window = w->next) | |
9107 | { | |
9108 | w = XWINDOW (window); | |
9109 | mark_window_display_accurate_1 (w, accurate_p); | |
a2889657 | 9110 | |
265a9e55 | 9111 | if (!NILP (w->vchild)) |
5f5c8ee5 | 9112 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 9113 | if (!NILP (w->hchild)) |
5f5c8ee5 | 9114 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
9115 | } |
9116 | ||
5f5c8ee5 | 9117 | if (accurate_p) |
a2889657 | 9118 | { |
d45de95b | 9119 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
9120 | last_arrow_string = Voverlay_arrow_string; |
9121 | } | |
9122 | else | |
9123 | { | |
5f5c8ee5 GM |
9124 | /* Force a thorough redisplay the next time by setting |
9125 | last_arrow_position and last_arrow_string to t, which is | |
9126 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
9127 | last_arrow_position = Qt; |
9128 | last_arrow_string = Qt; | |
9129 | } | |
9130 | } | |
5f5c8ee5 GM |
9131 | |
9132 | ||
9133 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
9134 | C. Since a display table doesn't have any parent, we don't have to | |
9135 | follow parent. Do not call this function directly but use the | |
9136 | macro DISP_CHAR_VECTOR. */ | |
9137 | ||
9138 | Lisp_Object | |
9139 | disp_char_vector (dp, c) | |
9140 | struct Lisp_Char_Table *dp; | |
9141 | int c; | |
9142 | { | |
9143 | int code[4], i; | |
9144 | Lisp_Object val; | |
9145 | ||
9146 | if (SINGLE_BYTE_CHAR_P (c)) | |
9147 | return (dp->contents[c]); | |
9148 | ||
c5924f47 | 9149 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
9150 | if (code[1] < 32) |
9151 | code[1] = -1; | |
9152 | else if (code[2] < 32) | |
9153 | code[2] = -1; | |
5f5c8ee5 GM |
9154 | |
9155 | /* Here, the possible range of code[0] (== charset ID) is | |
9156 | 128..max_charset. Since the top level char table contains data | |
9157 | for multibyte characters after 256th element, we must increment | |
9158 | code[0] by 128 to get a correct index. */ | |
9159 | code[0] += 128; | |
9160 | code[3] = -1; /* anchor */ | |
9161 | ||
9162 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
9163 | { | |
9164 | val = dp->contents[code[i]]; | |
9165 | if (!SUB_CHAR_TABLE_P (val)) | |
9166 | return (NILP (val) ? dp->defalt : val); | |
9167 | } | |
9168 | ||
9169 | /* Here, val is a sub char table. We return the default value of | |
9170 | it. */ | |
9171 | return (dp->defalt); | |
9172 | } | |
9173 | ||
9174 | ||
a2889657 | 9175 | \f |
5f5c8ee5 GM |
9176 | /*********************************************************************** |
9177 | Window Redisplay | |
9178 | ***********************************************************************/ | |
a2725ab2 | 9179 | |
5f5c8ee5 | 9180 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
9181 | |
9182 | static void | |
5f5c8ee5 GM |
9183 | redisplay_windows (window) |
9184 | Lisp_Object window; | |
90adcf20 | 9185 | { |
5f5c8ee5 GM |
9186 | while (!NILP (window)) |
9187 | { | |
9188 | struct window *w = XWINDOW (window); | |
9189 | ||
9190 | if (!NILP (w->hchild)) | |
9191 | redisplay_windows (w->hchild); | |
9192 | else if (!NILP (w->vchild)) | |
9193 | redisplay_windows (w->vchild); | |
9194 | else | |
9195 | redisplay_window (window, 0); | |
a2725ab2 | 9196 | |
5f5c8ee5 GM |
9197 | window = w->next; |
9198 | } | |
9199 | } | |
9200 | ||
9201 | ||
9202 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
9203 | DELTA is the number of bytes by which positions recorded in ROW | |
9204 | differ from current buffer positions. */ | |
9205 | ||
9206 | void | |
9207 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
9208 | struct window *w; | |
9209 | struct glyph_row *row; | |
9210 | struct glyph_matrix *matrix; | |
9211 | int delta, delta_bytes, dy, dvpos; | |
9212 | { | |
9213 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
9214 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
9215 | int x = row->x; | |
9216 | int pt_old = PT - delta; | |
9217 | ||
9218 | /* Skip over glyphs not having an object at the start of the row. | |
9219 | These are special glyphs like truncation marks on terminal | |
9220 | frames. */ | |
9221 | if (row->displays_text_p) | |
9222 | while (glyph < end | |
6fc556fd | 9223 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
9224 | && glyph->charpos < 0) |
9225 | { | |
9226 | x += glyph->pixel_width; | |
9227 | ++glyph; | |
9228 | } | |
9229 | ||
9230 | while (glyph < end | |
6fc556fd | 9231 | && !INTEGERP (glyph->object) |
5f5c8ee5 GM |
9232 | && (!BUFFERP (glyph->object) |
9233 | || glyph->charpos < pt_old)) | |
9234 | { | |
9235 | x += glyph->pixel_width; | |
9236 | ++glyph; | |
9237 | } | |
9238 | ||
9239 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
9240 | w->cursor.x = x; | |
9241 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
9242 | w->cursor.y = row->y + dy; | |
9243 | ||
9244 | if (w == XWINDOW (selected_window)) | |
9245 | { | |
9246 | if (!row->continued_p | |
9247 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
9248 | && row->x == 0) | |
9249 | { | |
9250 | this_line_buffer = XBUFFER (w->buffer); | |
9251 | ||
9252 | CHARPOS (this_line_start_pos) | |
9253 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
9254 | BYTEPOS (this_line_start_pos) | |
9255 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
9256 | ||
9257 | CHARPOS (this_line_end_pos) | |
9258 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
9259 | BYTEPOS (this_line_end_pos) | |
9260 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
9261 | ||
9262 | this_line_y = w->cursor.y; | |
9263 | this_line_pixel_height = row->height; | |
9264 | this_line_vpos = w->cursor.vpos; | |
9265 | this_line_start_x = row->x; | |
9266 | } | |
9267 | else | |
9268 | CHARPOS (this_line_start_pos) = 0; | |
9269 | } | |
9270 | } | |
9271 | ||
9272 | ||
9273 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
9274 | start STARTP. Sets the window start of WINDOW to that position. |
9275 | ||
9276 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
9277 | |
9278 | static INLINE struct text_pos | |
9279 | run_window_scroll_functions (window, startp) | |
9280 | Lisp_Object window; | |
9281 | struct text_pos startp; | |
9282 | { | |
9283 | struct window *w = XWINDOW (window); | |
9284 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
9285 | |
9286 | if (current_buffer != XBUFFER (w->buffer)) | |
9287 | abort (); | |
9288 | ||
5f5c8ee5 GM |
9289 | if (!NILP (Vwindow_scroll_functions)) |
9290 | { | |
9291 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
9292 | make_number (CHARPOS (startp))); | |
9293 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
9294 | /* In case the hook functions switch buffers. */ |
9295 | if (current_buffer != XBUFFER (w->buffer)) | |
9296 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 9297 | } |
90adcf20 | 9298 | |
5f5c8ee5 GM |
9299 | return startp; |
9300 | } | |
9301 | ||
9302 | ||
9303 | /* Modify the desired matrix of window W and W->vscroll so that the | |
cb617e7c GM |
9304 | line containing the cursor is fully visible. If this requires |
9305 | larger matrices than are allocated, set fonts_changed_p and return | |
9306 | 0. */ | |
5f5c8ee5 | 9307 | |
cb617e7c | 9308 | static int |
5f5c8ee5 GM |
9309 | make_cursor_line_fully_visible (w) |
9310 | struct window *w; | |
9311 | { | |
9312 | struct glyph_matrix *matrix; | |
9313 | struct glyph_row *row; | |
478d746b | 9314 | int window_height; |
5f5c8ee5 GM |
9315 | |
9316 | /* It's not always possible to find the cursor, e.g, when a window | |
9317 | is full of overlay strings. Don't do anything in that case. */ | |
9318 | if (w->cursor.vpos < 0) | |
cb617e7c | 9319 | return 1; |
5f5c8ee5 GM |
9320 | |
9321 | matrix = w->desired_matrix; | |
9322 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
9323 | ||
b28cb6ed GM |
9324 | /* If the cursor row is not partially visible, there's nothing |
9325 | to do. */ | |
9326 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
cb617e7c | 9327 | return 1; |
b28cb6ed GM |
9328 | |
9329 | /* If the row the cursor is in is taller than the window's height, | |
9330 | it's not clear what to do, so do nothing. */ | |
9331 | window_height = window_box_height (w); | |
9332 | if (row->height >= window_height) | |
cb617e7c | 9333 | return 1; |
b28cb6ed GM |
9334 | |
9335 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
5f5c8ee5 GM |
9336 | { |
9337 | int dy = row->height - row->visible_height; | |
9338 | w->vscroll = 0; | |
9339 | w->cursor.y += dy; | |
9340 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9341 | } | |
b28cb6ed | 9342 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
9343 | { |
9344 | int dy = - (row->height - row->visible_height); | |
9345 | w->vscroll = dy; | |
9346 | w->cursor.y += dy; | |
9347 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
9348 | } | |
b28cb6ed | 9349 | |
5f5c8ee5 GM |
9350 | /* When we change the cursor y-position of the selected window, |
9351 | change this_line_y as well so that the display optimization for | |
9352 | the cursor line of the selected window in redisplay_internal uses | |
9353 | the correct y-position. */ | |
9354 | if (w == XWINDOW (selected_window)) | |
9355 | this_line_y = w->cursor.y; | |
cb617e7c GM |
9356 | |
9357 | /* If vscrolling requires a larger glyph matrix, arrange for a fresh | |
9358 | redisplay with larger matrices. */ | |
9359 | if (matrix->nrows < required_matrix_height (w)) | |
9360 | { | |
9361 | fonts_changed_p = 1; | |
9362 | return 0; | |
9363 | } | |
9364 | ||
9365 | return 1; | |
5f5c8ee5 GM |
9366 | } |
9367 | ||
9368 | ||
9369 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
9370 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
9371 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
9372 | in redisplay_window to bring a partially visible line into view in | |
9373 | the case that only the cursor has moved. | |
9374 | ||
9375 | Value is | |
9376 | ||
9377 | 1 if scrolling succeeded | |
9378 | ||
9379 | 0 if scrolling didn't find point. | |
9380 | ||
9381 | -1 if new fonts have been loaded so that we must interrupt | |
9382 | redisplay, adjust glyph matrices, and try again. */ | |
9383 | ||
cb617e7c GM |
9384 | enum |
9385 | { | |
9386 | SCROLLING_SUCCESS, | |
9387 | SCROLLING_FAILED, | |
9388 | SCROLLING_NEED_LARGER_MATRICES | |
9389 | }; | |
9390 | ||
5f5c8ee5 GM |
9391 | static int |
9392 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
9393 | scroll_step, temp_scroll_step) | |
9394 | Lisp_Object window; | |
9395 | int just_this_one_p; | |
9396 | int scroll_conservatively, scroll_step; | |
9397 | int temp_scroll_step; | |
9398 | { | |
9399 | struct window *w = XWINDOW (window); | |
9400 | struct frame *f = XFRAME (w->frame); | |
9401 | struct text_pos scroll_margin_pos; | |
9402 | struct text_pos pos; | |
9403 | struct text_pos startp; | |
9404 | struct it it; | |
9405 | Lisp_Object window_end; | |
9406 | int this_scroll_margin; | |
9407 | int dy = 0; | |
9408 | int scroll_max; | |
b8a63ccb | 9409 | int rc; |
5f5c8ee5 GM |
9410 | int amount_to_scroll = 0; |
9411 | Lisp_Object aggressive; | |
9412 | int height; | |
9413 | ||
9414 | #if GLYPH_DEBUG | |
9415 | debug_method_add (w, "try_scrolling"); | |
78614721 | 9416 | #endif |
5f5c8ee5 GM |
9417 | |
9418 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
9419 | ||
9420 | /* Compute scroll margin height in pixels. We scroll when point is | |
9421 | within this distance from the top or bottom of the window. */ | |
9422 | if (scroll_margin > 0) | |
90adcf20 | 9423 | { |
5f5c8ee5 GM |
9424 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
9425 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9426 | } | |
9427 | else | |
9428 | this_scroll_margin = 0; | |
9429 | ||
9430 | /* Compute how much we should try to scroll maximally to bring point | |
9431 | into view. */ | |
0894e696 SM |
9432 | if (scroll_step || scroll_conservatively || temp_scroll_step) |
9433 | scroll_max = max (scroll_step, | |
9434 | max (scroll_conservatively, temp_scroll_step)); | |
5f5c8ee5 GM |
9435 | else if (NUMBERP (current_buffer->scroll_down_aggressively) |
9436 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
9437 | /* We're trying to scroll because of aggressive scrolling | |
9438 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
9439 | there should be a variable for this. */ | |
9440 | scroll_max = 10; | |
9441 | else | |
9442 | scroll_max = 0; | |
9443 | scroll_max *= CANON_Y_UNIT (f); | |
9444 | ||
9445 | /* Decide whether we have to scroll down. Start at the window end | |
9446 | and move this_scroll_margin up to find the position of the scroll | |
9447 | margin. */ | |
9448 | window_end = Fwindow_end (window, Qt); | |
9449 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
9450 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
9451 | if (this_scroll_margin) | |
9452 | { | |
9453 | start_display (&it, w, scroll_margin_pos); | |
9454 | move_it_vertically (&it, - this_scroll_margin); | |
9455 | scroll_margin_pos = it.current.pos; | |
9456 | } | |
9457 | ||
9458 | if (PT >= CHARPOS (scroll_margin_pos)) | |
9459 | { | |
9460 | int y0; | |
9461 | ||
9462 | /* Point is in the scroll margin at the bottom of the window, or | |
9463 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 9464 | |
5f5c8ee5 GM |
9465 | /* Compute the distance from the scroll margin to PT. |
9466 | Give up if the distance is greater than scroll_max. */ | |
9467 | start_display (&it, w, scroll_margin_pos); | |
9468 | y0 = it.current_y; | |
9469 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
9470 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
e89aaabd | 9471 | |
82e274d1 GM |
9472 | /* With a scroll_margin of 0, scroll_margin_pos is at the window |
9473 | end, which is one line below the window. The iterator's | |
9474 | current_y will be same as y0 in that case, but we have to | |
9475 | scroll a line to make PT visible. That's the reason why 1 is | |
9476 | added below. */ | |
9477 | dy = 1 + it.current_y - y0; | |
47589c8c | 9478 | |
5f5c8ee5 | 9479 | if (dy > scroll_max) |
cb617e7c | 9480 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9481 | |
9482 | /* Move the window start down. If scrolling conservatively, | |
9483 | move it just enough down to make point visible. If | |
9484 | scroll_step is set, move it down by scroll_step. */ | |
9485 | start_display (&it, w, startp); | |
9486 | ||
9487 | if (scroll_conservatively) | |
e89aaabd GM |
9488 | amount_to_scroll |
9489 | = max (max (dy, CANON_Y_UNIT (f)), | |
9490 | CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9491 | else if (scroll_step || temp_scroll_step) |
9492 | amount_to_scroll = scroll_max; | |
9493 | else | |
90adcf20 | 9494 | { |
5f5c8ee5 GM |
9495 | aggressive = current_buffer->scroll_down_aggressively; |
9496 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 9497 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9498 | if (NUMBERP (aggressive)) |
9499 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9500 | } | |
a2725ab2 | 9501 | |
5f5c8ee5 | 9502 | if (amount_to_scroll <= 0) |
cb617e7c | 9503 | return SCROLLING_FAILED; |
a2725ab2 | 9504 | |
5f5c8ee5 GM |
9505 | move_it_vertically (&it, amount_to_scroll); |
9506 | startp = it.current.pos; | |
9507 | } | |
9508 | else | |
9509 | { | |
9510 | /* See if point is inside the scroll margin at the top of the | |
9511 | window. */ | |
9512 | scroll_margin_pos = startp; | |
9513 | if (this_scroll_margin) | |
9514 | { | |
9515 | start_display (&it, w, startp); | |
9516 | move_it_vertically (&it, this_scroll_margin); | |
9517 | scroll_margin_pos = it.current.pos; | |
9518 | } | |
9519 | ||
9520 | if (PT < CHARPOS (scroll_margin_pos)) | |
9521 | { | |
9522 | /* Point is in the scroll margin at the top of the window or | |
9523 | above what is displayed in the window. */ | |
9524 | int y0; | |
9525 | ||
9526 | /* Compute the vertical distance from PT to the scroll | |
9527 | margin position. Give up if distance is greater than | |
9528 | scroll_max. */ | |
9529 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
9530 | start_display (&it, w, pos); | |
9531 | y0 = it.current_y; | |
9532 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
9533 | it.last_visible_y, -1, | |
9534 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
9535 | dy = it.current_y - y0; | |
9536 | if (dy > scroll_max) | |
cb617e7c | 9537 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9538 | |
9539 | /* Compute new window start. */ | |
9540 | start_display (&it, w, startp); | |
9541 | ||
9542 | if (scroll_conservatively) | |
0894e696 SM |
9543 | amount_to_scroll = |
9544 | max (dy, CANON_Y_UNIT (f) * max (scroll_step, temp_scroll_step)); | |
5f5c8ee5 GM |
9545 | else if (scroll_step || temp_scroll_step) |
9546 | amount_to_scroll = scroll_max; | |
538f13d4 | 9547 | else |
5f5c8ee5 GM |
9548 | { |
9549 | aggressive = current_buffer->scroll_up_aggressively; | |
9550 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 9551 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
9552 | if (NUMBERP (aggressive)) |
9553 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
9554 | } | |
a2725ab2 | 9555 | |
5f5c8ee5 | 9556 | if (amount_to_scroll <= 0) |
cb617e7c | 9557 | return SCROLLING_FAILED; |
5f5c8ee5 GM |
9558 | |
9559 | move_it_vertically (&it, - amount_to_scroll); | |
9560 | startp = it.current.pos; | |
90adcf20 RS |
9561 | } |
9562 | } | |
a2889657 | 9563 | |
5f5c8ee5 GM |
9564 | /* Run window scroll functions. */ |
9565 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 9566 | |
5f5c8ee5 GM |
9567 | /* Display the window. Give up if new fonts are loaded, or if point |
9568 | doesn't appear. */ | |
9569 | if (!try_window (window, startp)) | |
cb617e7c | 9570 | rc = SCROLLING_NEED_LARGER_MATRICES; |
5f5c8ee5 GM |
9571 | else if (w->cursor.vpos < 0) |
9572 | { | |
9573 | clear_glyph_matrix (w->desired_matrix); | |
cb617e7c | 9574 | rc = SCROLLING_FAILED; |
5f5c8ee5 GM |
9575 | } |
9576 | else | |
9577 | { | |
9578 | /* Maybe forget recorded base line for line number display. */ | |
9579 | if (!just_this_one_p | |
9580 | || current_buffer->clip_changed | |
9142dd5b | 9581 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
9582 | w->base_line_number = Qnil; |
9583 | ||
9584 | /* If cursor ends up on a partially visible line, shift display | |
cb617e7c GM |
9585 | lines up or down. If that fails because we need larger |
9586 | matrices, give up. */ | |
9587 | if (!make_cursor_line_fully_visible (w)) | |
9588 | rc = SCROLLING_NEED_LARGER_MATRICES; | |
9589 | else | |
9590 | rc = SCROLLING_SUCCESS; | |
5f5c8ee5 GM |
9591 | } |
9592 | ||
9593 | return rc; | |
a2889657 JB |
9594 | } |
9595 | ||
5f5c8ee5 GM |
9596 | |
9597 | /* Compute a suitable window start for window W if display of W starts | |
9598 | on a continuation line. Value is non-zero if a new window start | |
9599 | was computed. | |
9600 | ||
9601 | The new window start will be computed, based on W's width, starting | |
9602 | from the start of the continued line. It is the start of the | |
9603 | screen line with the minimum distance from the old start W->start. */ | |
9604 | ||
9605 | static int | |
9606 | compute_window_start_on_continuation_line (w) | |
9607 | struct window *w; | |
1f1ff51d | 9608 | { |
5f5c8ee5 GM |
9609 | struct text_pos pos, start_pos; |
9610 | int window_start_changed_p = 0; | |
1f1ff51d | 9611 | |
5f5c8ee5 | 9612 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 9613 | |
5f5c8ee5 GM |
9614 | /* If window start is on a continuation line... Window start may be |
9615 | < BEGV in case there's invisible text at the start of the | |
9616 | buffer (M-x rmail, for example). */ | |
9617 | if (CHARPOS (start_pos) > BEGV | |
9618 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 9619 | { |
5f5c8ee5 GM |
9620 | struct it it; |
9621 | struct glyph_row *row; | |
f3751a65 GM |
9622 | |
9623 | /* Handle the case that the window start is out of range. */ | |
9624 | if (CHARPOS (start_pos) < BEGV) | |
9625 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
9626 | else if (CHARPOS (start_pos) > ZV) | |
9627 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
9628 | |
9629 | /* Find the start of the continued line. This should be fast | |
9630 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 9631 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
9632 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
9633 | row, DEFAULT_FACE_ID); | |
9634 | reseat_at_previous_visible_line_start (&it); | |
9635 | ||
9636 | /* If the line start is "too far" away from the window start, | |
9637 | say it takes too much time to compute a new window start. */ | |
9638 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
9639 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
9640 | { | |
9641 | int min_distance, distance; | |
9642 | ||
9643 | /* Move forward by display lines to find the new window | |
9644 | start. If window width was enlarged, the new start can | |
9645 | be expected to be > the old start. If window width was | |
9646 | decreased, the new window start will be < the old start. | |
9647 | So, we're looking for the display line start with the | |
9648 | minimum distance from the old window start. */ | |
9649 | pos = it.current.pos; | |
9650 | min_distance = INFINITY; | |
9651 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
9652 | distance < min_distance) | |
9653 | { | |
9654 | min_distance = distance; | |
9655 | pos = it.current.pos; | |
9656 | move_it_by_lines (&it, 1, 0); | |
9657 | } | |
9658 | ||
9659 | /* Set the window start there. */ | |
9660 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
9661 | window_start_changed_p = 1; | |
9662 | } | |
1f1ff51d | 9663 | } |
5f5c8ee5 GM |
9664 | |
9665 | return window_start_changed_p; | |
1f1ff51d KH |
9666 | } |
9667 | ||
5f5c8ee5 | 9668 | |
47589c8c GM |
9669 | /* Try cursor movement in case text has not changes in window WINDOW, |
9670 | with window start STARTP. Value is | |
9671 | ||
cb617e7c | 9672 | CURSOR_MOVEMENT_SUCCESS if successful |
47589c8c | 9673 | |
cb617e7c GM |
9674 | CURSOR_MOVEMENT_CANNOT_BE_USED if this method cannot be used |
9675 | ||
9676 | CURSOR_MOVEMENT_MUST_SCROLL if we know we have to scroll the | |
9677 | display. *SCROLL_STEP is set to 1, under certain circumstances, if | |
9678 | we want to scroll as if scroll-step were set to 1. See the code. | |
9679 | ||
9680 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES if we need larger matrices, in | |
9681 | which case we have to abort this redisplay, and adjust matrices | |
9682 | first. */ | |
9683 | ||
9684 | enum | |
9685 | { | |
9686 | CURSOR_MOVEMENT_SUCCESS, | |
9687 | CURSOR_MOVEMENT_CANNOT_BE_USED, | |
9688 | CURSOR_MOVEMENT_MUST_SCROLL, | |
9689 | CURSOR_MOVEMENT_NEED_LARGER_MATRICES | |
9690 | }; | |
47589c8c GM |
9691 | |
9692 | static int | |
9693 | try_cursor_movement (window, startp, scroll_step) | |
9694 | Lisp_Object window; | |
9695 | struct text_pos startp; | |
9696 | int *scroll_step; | |
9697 | { | |
9698 | struct window *w = XWINDOW (window); | |
9699 | struct frame *f = XFRAME (w->frame); | |
cb617e7c | 9700 | int rc = CURSOR_MOVEMENT_CANNOT_BE_USED; |
47589c8c | 9701 | |
69d1f7c9 | 9702 | #if GLYPH_DEBUG |
76cb5e06 GM |
9703 | if (inhibit_try_cursor_movement) |
9704 | return rc; | |
9705 | #endif | |
9706 | ||
47589c8c GM |
9707 | /* Handle case where text has not changed, only point, and it has |
9708 | not moved off the frame. */ | |
9709 | if (/* Point may be in this window. */ | |
9710 | PT >= CHARPOS (startp) | |
47589c8c GM |
9711 | /* Selective display hasn't changed. */ |
9712 | && !current_buffer->clip_changed | |
4db87380 GM |
9713 | /* Function force-mode-line-update is used to force a thorough |
9714 | redisplay. It sets either windows_or_buffers_changed or | |
9715 | update_mode_lines. So don't take a shortcut here for these | |
9716 | cases. */ | |
9717 | && !update_mode_lines | |
9718 | && !windows_or_buffers_changed | |
47589c8c GM |
9719 | /* Can't use this case if highlighting a region. When a |
9720 | region exists, cursor movement has to do more than just | |
9721 | set the cursor. */ | |
9722 | && !(!NILP (Vtransient_mark_mode) | |
9723 | && !NILP (current_buffer->mark_active)) | |
9724 | && NILP (w->region_showing) | |
9725 | && NILP (Vshow_trailing_whitespace) | |
9726 | /* Right after splitting windows, last_point may be nil. */ | |
9727 | && INTEGERP (w->last_point) | |
9728 | /* This code is not used for mini-buffer for the sake of the case | |
9729 | of redisplaying to replace an echo area message; since in | |
9730 | that case the mini-buffer contents per se are usually | |
9731 | unchanged. This code is of no real use in the mini-buffer | |
9732 | since the handling of this_line_start_pos, etc., in redisplay | |
9733 | handles the same cases. */ | |
9734 | && !EQ (window, minibuf_window) | |
9735 | /* When splitting windows or for new windows, it happens that | |
9736 | redisplay is called with a nil window_end_vpos or one being | |
9737 | larger than the window. This should really be fixed in | |
9738 | window.c. I don't have this on my list, now, so we do | |
9739 | approximately the same as the old redisplay code. --gerd. */ | |
9740 | && INTEGERP (w->window_end_vpos) | |
9741 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
9742 | && (FRAME_WINDOW_P (f) | |
9743 | || !MARKERP (Voverlay_arrow_position) | |
9744 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
9745 | { | |
9746 | int this_scroll_margin; | |
8ee5b6a3 | 9747 | struct glyph_row *row = NULL; |
47589c8c GM |
9748 | |
9749 | #if GLYPH_DEBUG | |
9750 | debug_method_add (w, "cursor movement"); | |
9751 | #endif | |
9752 | ||
9753 | /* Scroll if point within this distance from the top or bottom | |
9754 | of the window. This is a pixel value. */ | |
9755 | this_scroll_margin = max (0, scroll_margin); | |
9756 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
9757 | this_scroll_margin *= CANON_Y_UNIT (f); | |
9758 | ||
9759 | /* Start with the row the cursor was displayed during the last | |
9760 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
9761 | if (w->last_cursor.vpos < 0 |
9762 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
cb617e7c | 9763 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9764 | else |
9765 | { | |
9766 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
9767 | if (row->mode_line_p) | |
9768 | ++row; | |
9769 | if (!row->enabled_p) | |
cb617e7c | 9770 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9771 | } |
9772 | ||
cb617e7c | 9773 | if (rc == CURSOR_MOVEMENT_CANNOT_BE_USED) |
47589c8c GM |
9774 | { |
9775 | int scroll_p = 0; | |
68c5d1db GM |
9776 | int last_y = window_text_bottom_y (w) - this_scroll_margin; |
9777 | ||
47589c8c GM |
9778 | if (PT > XFASTINT (w->last_point)) |
9779 | { | |
9780 | /* Point has moved forward. */ | |
47589c8c GM |
9781 | while (MATRIX_ROW_END_CHARPOS (row) < PT |
9782 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
9783 | { | |
9784 | xassert (row->enabled_p); | |
9785 | ++row; | |
9786 | } | |
9787 | ||
9788 | /* The end position of a row equals the start position | |
9789 | of the next row. If PT is there, we would rather | |
cafafe0b GM |
9790 | display it in the next line. */ |
9791 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
9792 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
9793 | && !cursor_row_p (w, row)) | |
9794 | ++row; | |
47589c8c GM |
9795 | |
9796 | /* If within the scroll margin, scroll. Note that | |
9797 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
9798 | the next line would be drawn, and that | |
9799 | this_scroll_margin can be zero. */ | |
9800 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
9801 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
9802 | /* Line is completely visible last line in window | |
9803 | and PT is to be set in the next line. */ | |
9804 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
9805 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
9806 | && !row->ends_at_zv_p | |
9807 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
9808 | scroll_p = 1; | |
9809 | } | |
9810 | else if (PT < XFASTINT (w->last_point)) | |
9811 | { | |
9812 | /* Cursor has to be moved backward. Note that PT >= | |
9813 | CHARPOS (startp) because of the outer | |
9814 | if-statement. */ | |
9815 | while (!row->mode_line_p | |
9816 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
9817 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
9818 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
9819 | && (row->y > this_scroll_margin | |
9820 | || CHARPOS (startp) == BEGV)) | |
9821 | { | |
9822 | xassert (row->enabled_p); | |
9823 | --row; | |
9824 | } | |
9825 | ||
9826 | /* Consider the following case: Window starts at BEGV, | |
9827 | there is invisible, intangible text at BEGV, so that | |
9828 | display starts at some point START > BEGV. It can | |
9829 | happen that we are called with PT somewhere between | |
9830 | BEGV and START. Try to handle that case. */ | |
9831 | if (row < w->current_matrix->rows | |
9832 | || row->mode_line_p) | |
9833 | { | |
9834 | row = w->current_matrix->rows; | |
9835 | if (row->mode_line_p) | |
9836 | ++row; | |
9837 | } | |
9838 | ||
9839 | /* Due to newlines in overlay strings, we may have to | |
9840 | skip forward over overlay strings. */ | |
68c5d1db GM |
9841 | while (MATRIX_ROW_BOTTOM_Y (row) < last_y |
9842 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
9843 | && !cursor_row_p (w, row)) | |
47589c8c GM |
9844 | ++row; |
9845 | ||
9846 | /* If within the scroll margin, scroll. */ | |
9847 | if (row->y < this_scroll_margin | |
9848 | && CHARPOS (startp) != BEGV) | |
9849 | scroll_p = 1; | |
9850 | } | |
9851 | ||
9852 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
9853 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
9854 | { | |
9855 | /* if PT is not in the glyph row, give up. */ | |
cb617e7c | 9856 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c | 9857 | } |
440fc135 | 9858 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c | 9859 | { |
8de4aaf8 GM |
9860 | if (PT == MATRIX_ROW_END_CHARPOS (row) |
9861 | && !row->ends_at_zv_p | |
9862 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
cb617e7c | 9863 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
3f7e3031 | 9864 | else if (row->height > window_box_height (w)) |
440fc135 | 9865 | { |
8de4aaf8 GM |
9866 | /* If we end up in a partially visible line, let's |
9867 | make it fully visible, except when it's taller | |
9868 | than the window, in which case we can't do much | |
9869 | about it. */ | |
440fc135 | 9870 | *scroll_step = 1; |
cb617e7c | 9871 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
440fc135 GM |
9872 | } |
9873 | else | |
9874 | { | |
9875 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
9876 | try_window (window, startp); | |
cb617e7c GM |
9877 | if (!make_cursor_line_fully_visible (w)) |
9878 | rc = CURSOR_MOVEMENT_NEED_LARGER_MATRICES; | |
9879 | else | |
9880 | rc = CURSOR_MOVEMENT_SUCCESS; | |
440fc135 | 9881 | } |
47589c8c GM |
9882 | } |
9883 | else if (scroll_p) | |
cb617e7c | 9884 | rc = CURSOR_MOVEMENT_MUST_SCROLL; |
47589c8c GM |
9885 | else |
9886 | { | |
9887 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
cb617e7c | 9888 | rc = CURSOR_MOVEMENT_SUCCESS; |
47589c8c GM |
9889 | } |
9890 | } | |
9891 | } | |
9892 | ||
9893 | return rc; | |
9894 | } | |
9895 | ||
9896 | ||
5f5c8ee5 GM |
9897 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
9898 | selected_window is redisplayed. */ | |
90adcf20 | 9899 | |
a2889657 | 9900 | static void |
5f5c8ee5 | 9901 | redisplay_window (window, just_this_one_p) |
a2889657 | 9902 | Lisp_Object window; |
5f5c8ee5 | 9903 | int just_this_one_p; |
a2889657 | 9904 | { |
5f5c8ee5 GM |
9905 | struct window *w = XWINDOW (window); |
9906 | struct frame *f = XFRAME (w->frame); | |
9907 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 9908 | struct buffer *old = current_buffer; |
5f5c8ee5 | 9909 | struct text_pos lpoint, opoint, startp; |
e481f960 | 9910 | int update_mode_line; |
5f5c8ee5 GM |
9911 | int tem; |
9912 | struct it it; | |
9913 | /* Record it now because it's overwritten. */ | |
9914 | int current_matrix_up_to_date_p = 0; | |
5f5c8ee5 | 9915 | int temp_scroll_step = 0; |
2d27dae2 | 9916 | int count = BINDING_STACK_SIZE (); |
47589c8c | 9917 | int rc; |
a2889657 | 9918 | |
5f5c8ee5 GM |
9919 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
9920 | opoint = lpoint; | |
a2889657 | 9921 | |
5f5c8ee5 GM |
9922 | /* W must be a leaf window here. */ |
9923 | xassert (!NILP (w->buffer)); | |
9924 | #if GLYPH_DEBUG | |
9925 | *w->desired_matrix->method = 0; | |
9926 | #endif | |
2e54982e RS |
9927 | |
9928 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
9929 | |
9930 | reconsider_clip_changes (w, buffer); | |
9931 | ||
5f5c8ee5 GM |
9932 | /* Has the mode line to be updated? */ |
9933 | update_mode_line = (!NILP (w->update_mode_line) | |
9934 | || update_mode_lines | |
9935 | || buffer->clip_changed); | |
8de2d90b JB |
9936 | |
9937 | if (MINI_WINDOW_P (w)) | |
9938 | { | |
5f5c8ee5 | 9939 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 9940 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
9941 | { |
9942 | if (update_mode_line) | |
9943 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 9944 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
9945 | goto finish_menu_bars; |
9946 | else | |
9947 | /* We've already displayed the echo area glyphs in this window. */ | |
9948 | goto finish_scroll_bars; | |
9949 | } | |
73af359d | 9950 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 9951 | { |
5f5c8ee5 GM |
9952 | /* W is a mini-buffer window, but it's not the currently |
9953 | active one, so clear it. */ | |
9954 | int yb = window_text_bottom_y (w); | |
9955 | struct glyph_row *row; | |
9956 | int y; | |
9957 | ||
9958 | for (y = 0, row = w->desired_matrix->rows; | |
9959 | y < yb; | |
9960 | y += row->height, ++row) | |
9961 | blank_row (w, row, y); | |
88f22aff | 9962 | goto finish_scroll_bars; |
8de2d90b | 9963 | } |
c095a1dd GM |
9964 | |
9965 | clear_glyph_matrix (w->desired_matrix); | |
8de2d90b | 9966 | } |
a2889657 | 9967 | |
5f5c8ee5 GM |
9968 | /* Otherwise set up data on this window; select its buffer and point |
9969 | value. */ | |
6a93695f GM |
9970 | /* Really select the buffer, for the sake of buffer-local |
9971 | variables. */ | |
9972 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
9973 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
9974 | ||
9975 | current_matrix_up_to_date_p | |
9976 | = (!NILP (w->window_end_valid) | |
9977 | && !current_buffer->clip_changed | |
9978 | && XFASTINT (w->last_modified) >= MODIFF | |
9979 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 9980 | |
5f5c8ee5 GM |
9981 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
9982 | the window end being valid, so set it to nil there. */ | |
9983 | if (windows_or_buffers_changed) | |
9984 | { | |
9985 | /* If window starts on a continuation line, maybe adjust the | |
9986 | window start in case the window's width changed. */ | |
9987 | if (XMARKER (w->start)->buffer == current_buffer) | |
9988 | compute_window_start_on_continuation_line (w); | |
9989 | ||
9990 | w->window_end_valid = Qnil; | |
9991 | } | |
12adba34 | 9992 | |
5f5c8ee5 GM |
9993 | /* Some sanity checks. */ |
9994 | CHECK_WINDOW_END (w); | |
9995 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 9996 | abort (); |
5f5c8ee5 | 9997 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 9998 | abort (); |
a2889657 | 9999 | |
28995e67 RS |
10000 | /* If %c is in mode line, update it if needed. */ |
10001 | if (!NILP (w->column_number_displayed) | |
10002 | /* This alternative quickly identifies a common case | |
10003 | where no change is needed. */ | |
10004 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
10005 | && XFASTINT (w->last_modified) >= MODIFF |
10006 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
10007 | && XFASTINT (w->column_number_displayed) != current_column ()) |
10008 | update_mode_line = 1; | |
10009 | ||
5f5c8ee5 GM |
10010 | /* Count number of windows showing the selected buffer. An indirect |
10011 | buffer counts as its base buffer. */ | |
10012 | if (!just_this_one_p) | |
42640f83 RS |
10013 | { |
10014 | struct buffer *current_base, *window_base; | |
10015 | current_base = current_buffer; | |
10016 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
10017 | if (current_base->base_buffer) | |
10018 | current_base = current_base->base_buffer; | |
10019 | if (window_base->base_buffer) | |
10020 | window_base = window_base->base_buffer; | |
10021 | if (current_base == window_base) | |
10022 | buffer_shared++; | |
10023 | } | |
a2889657 | 10024 | |
5f5c8ee5 GM |
10025 | /* Point refers normally to the selected window. For any other |
10026 | window, set up appropriate value. */ | |
a2889657 JB |
10027 | if (!EQ (window, selected_window)) |
10028 | { | |
12adba34 RS |
10029 | int new_pt = XMARKER (w->pointm)->charpos; |
10030 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 10031 | if (new_pt < BEGV) |
a2889657 | 10032 | { |
f67a0f51 | 10033 | new_pt = BEGV; |
12adba34 RS |
10034 | new_pt_byte = BEGV_BYTE; |
10035 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 10036 | } |
f67a0f51 | 10037 | else if (new_pt > (ZV - 1)) |
a2889657 | 10038 | { |
f67a0f51 | 10039 | new_pt = ZV; |
12adba34 RS |
10040 | new_pt_byte = ZV_BYTE; |
10041 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 10042 | } |
5f5c8ee5 | 10043 | |
f67a0f51 | 10044 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 10045 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
10046 | } |
10047 | ||
f4faa47c | 10048 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
10049 | have changed, invalidate the width run cache. It's true that |
10050 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
10051 | redisplay goes (non-fatally) haywire when the display table is |
10052 | changed, so why should we worry about doing any better? */ | |
10053 | if (current_buffer->width_run_cache) | |
10054 | { | |
f908610f | 10055 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
10056 | |
10057 | if (! disptab_matches_widthtab (disptab, | |
10058 | XVECTOR (current_buffer->width_table))) | |
10059 | { | |
10060 | invalidate_region_cache (current_buffer, | |
10061 | current_buffer->width_run_cache, | |
10062 | BEG, Z); | |
10063 | recompute_width_table (current_buffer, disptab); | |
10064 | } | |
10065 | } | |
10066 | ||
a2889657 | 10067 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
10068 | if (XMARKER (w->start)->buffer != current_buffer) |
10069 | goto recenter; | |
10070 | ||
5f5c8ee5 | 10071 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 10072 | |
cf0df6ab RS |
10073 | /* If someone specified a new starting point but did not insist, |
10074 | check whether it can be used. */ | |
cfad01b4 GM |
10075 | if (!NILP (w->optional_new_start) |
10076 | && CHARPOS (startp) >= BEGV | |
10077 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
10078 | { |
10079 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
10080 | start_display (&it, w, startp); |
10081 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
10082 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
10083 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
10084 | w->force_start = Qt; |
10085 | } | |
10086 | ||
8de2d90b | 10087 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 10088 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
10089 | if (!NILP (w->force_start) |
10090 | || w->frozen_window_start_p) | |
a2889657 | 10091 | { |
e63574d7 | 10092 | w->force_start = Qnil; |
5f5c8ee5 | 10093 | w->vscroll = 0; |
b5174a51 | 10094 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
10095 | |
10096 | /* Forget any recorded base line for line number display. */ | |
10097 | if (!current_matrix_up_to_date_p | |
10098 | || current_buffer->clip_changed) | |
10099 | w->base_line_number = Qnil; | |
10100 | ||
75c43375 RS |
10101 | /* Redisplay the mode line. Select the buffer properly for that. |
10102 | Also, run the hook window-scroll-functions | |
10103 | because we have scrolled. */ | |
e63574d7 RS |
10104 | /* Note, we do this after clearing force_start because |
10105 | if there's an error, it is better to forget about force_start | |
10106 | than to get into an infinite loop calling the hook functions | |
10107 | and having them get more errors. */ | |
75c43375 RS |
10108 | if (!update_mode_line |
10109 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 10110 | { |
e481f960 RS |
10111 | update_mode_line = 1; |
10112 | w->update_mode_line = Qt; | |
5f5c8ee5 | 10113 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 10114 | } |
5f5c8ee5 | 10115 | |
ac90c44f GM |
10116 | w->last_modified = make_number (0); |
10117 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 GM |
10118 | if (CHARPOS (startp) < BEGV) |
10119 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
10120 | else if (CHARPOS (startp) > ZV) | |
10121 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
10122 | ||
10123 | /* Redisplay, then check if cursor has been set during the | |
10124 | redisplay. Give up if new fonts were loaded. */ | |
10125 | if (!try_window (window, startp)) | |
10126 | { | |
10127 | w->force_start = Qt; | |
10128 | clear_glyph_matrix (w->desired_matrix); | |
504454e8 | 10129 | goto finish_scroll_bars; |
5f5c8ee5 GM |
10130 | } |
10131 | ||
9472f927 | 10132 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 10133 | { |
b28cb6ed GM |
10134 | /* If point does not appear, try to move point so it does |
10135 | appear. The desired matrix has been built above, so we | |
10136 | can use it here. */ | |
10137 | int window_height; | |
10138 | struct glyph_row *row; | |
10139 | ||
10140 | window_height = window_box_height (w) / 2; | |
10141 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); | |
10142 | while (MATRIX_ROW_BOTTOM_Y (row) < window_height) | |
5f5c8ee5 GM |
10143 | ++row; |
10144 | ||
10145 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
10146 | MATRIX_ROW_START_BYTEPOS (row)); | |
10147 | ||
90adcf20 | 10148 | if (w != XWINDOW (selected_window)) |
12adba34 | 10149 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
10150 | else if (current_buffer == old) |
10151 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
10152 | ||
10153 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
10154 | ||
10155 | /* If we are highlighting the region, then we just changed | |
10156 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
10157 | if (!NILP (Vtransient_mark_mode) |
10158 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 10159 | { |
5f5c8ee5 GM |
10160 | clear_glyph_matrix (w->desired_matrix); |
10161 | if (!try_window (window, startp)) | |
cb617e7c | 10162 | goto need_larger_matrices; |
6f27fa9b | 10163 | } |
a2889657 | 10164 | } |
5f5c8ee5 | 10165 | |
cb617e7c GM |
10166 | if (!make_cursor_line_fully_visible (w)) |
10167 | goto need_larger_matrices; | |
5f5c8ee5 GM |
10168 | #if GLYPH_DEBUG |
10169 | debug_method_add (w, "forced window start"); | |
10170 | #endif | |
a2889657 JB |
10171 | goto done; |
10172 | } | |
10173 | ||
5f5c8ee5 GM |
10174 | /* Handle case where text has not changed, only point, and it has |
10175 | not moved off the frame. */ | |
10176 | if (current_matrix_up_to_date_p | |
47589c8c | 10177 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
cb617e7c | 10178 | rc != CURSOR_MOVEMENT_CANNOT_BE_USED)) |
a2889657 | 10179 | { |
cb617e7c GM |
10180 | switch (rc) |
10181 | { | |
10182 | case CURSOR_MOVEMENT_SUCCESS: | |
10183 | goto done; | |
10184 | ||
10185 | case CURSOR_MOVEMENT_NEED_LARGER_MATRICES: | |
10186 | goto need_larger_matrices; | |
10187 | ||
10188 | case CURSOR_MOVEMENT_MUST_SCROLL: | |
10189 | goto try_to_scroll; | |
10190 | ||
10191 | default: | |
10192 | abort (); | |
10193 | } | |
a2889657 JB |
10194 | } |
10195 | /* If current starting point was originally the beginning of a line | |
10196 | but no longer is, find a new starting point. */ | |
265a9e55 | 10197 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
10198 | && !(CHARPOS (startp) <= BEGV |
10199 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 10200 | { |
5f5c8ee5 GM |
10201 | #if GLYPH_DEBUG |
10202 | debug_method_add (w, "recenter 1"); | |
10203 | #endif | |
a2889657 JB |
10204 | goto recenter; |
10205 | } | |
5f5c8ee5 | 10206 | |
27d16f05 GM |
10207 | /* Try scrolling with try_window_id. Value is > 0 if update has |
10208 | been done, it is -1 if we know that the same window start will | |
10209 | not work. It is 0 if unsuccessful for some other reason. */ | |
10210 | else if ((tem = try_window_id (w)) != 0) | |
a2889657 | 10211 | { |
5f5c8ee5 | 10212 | #if GLYPH_DEBUG |
ef121659 | 10213 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
10214 | #endif |
10215 | ||
10216 | if (fonts_changed_p) | |
cb617e7c | 10217 | goto need_larger_matrices; |
a2889657 JB |
10218 | if (tem > 0) |
10219 | goto done; | |
ef121659 | 10220 | |
5f5c8ee5 GM |
10221 | /* Otherwise try_window_id has returned -1 which means that we |
10222 | don't want the alternative below this comment to execute. */ | |
a2889657 | 10223 | } |
5f5c8ee5 GM |
10224 | else if (CHARPOS (startp) >= BEGV |
10225 | && CHARPOS (startp) <= ZV | |
10226 | && PT >= CHARPOS (startp) | |
10227 | && (CHARPOS (startp) < ZV | |
e9874cee | 10228 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 10229 | || CHARPOS (startp) == BEGV |
8850a573 RS |
10230 | || (XFASTINT (w->last_modified) >= MODIFF |
10231 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 10232 | { |
5f5c8ee5 GM |
10233 | #if GLYPH_DEBUG |
10234 | debug_method_add (w, "same window start"); | |
10235 | #endif | |
10236 | ||
10237 | /* Try to redisplay starting at same place as before. | |
10238 | If point has not moved off frame, accept the results. */ | |
10239 | if (!current_matrix_up_to_date_p | |
10240 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
10241 | because a window scroll function can have changed the |
10242 | buffer. */ | |
5f5c8ee5 GM |
10243 | || !NILP (Vwindow_scroll_functions) |
10244 | || MINI_WINDOW_P (w) | |
10245 | || !try_window_reusing_current_matrix (w)) | |
10246 | { | |
10247 | IF_DEBUG (debug_method_add (w, "1")); | |
10248 | try_window (window, startp); | |
10249 | } | |
10250 | ||
10251 | if (fonts_changed_p) | |
cb617e7c | 10252 | goto need_larger_matrices; |
5f5c8ee5 GM |
10253 | |
10254 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 10255 | { |
5f5c8ee5 GM |
10256 | if (!just_this_one_p |
10257 | || current_buffer->clip_changed | |
9142dd5b | 10258 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
10259 | /* Forget any recorded base line for line number display. */ |
10260 | w->base_line_number = Qnil; | |
5f5c8ee5 | 10261 | |
cb617e7c GM |
10262 | if (!make_cursor_line_fully_visible (w)) |
10263 | goto need_larger_matrices; | |
aa6d10fa RS |
10264 | goto done; |
10265 | } | |
a2889657 | 10266 | else |
5f5c8ee5 | 10267 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
10268 | } |
10269 | ||
5f5c8ee5 GM |
10270 | try_to_scroll: |
10271 | ||
ac90c44f GM |
10272 | w->last_modified = make_number (0); |
10273 | w->last_overlay_modified = make_number (0); | |
5f5c8ee5 | 10274 | |
e481f960 RS |
10275 | /* Redisplay the mode line. Select the buffer properly for that. */ |
10276 | if (!update_mode_line) | |
10277 | { | |
e481f960 RS |
10278 | update_mode_line = 1; |
10279 | w->update_mode_line = Qt; | |
10280 | } | |
a2889657 | 10281 | |
5f5c8ee5 GM |
10282 | /* Try to scroll by specified few lines. */ |
10283 | if ((scroll_conservatively | |
10284 | || scroll_step | |
10285 | || temp_scroll_step | |
10286 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
10287 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 10288 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
10289 | && CHARPOS (startp) >= BEGV |
10290 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 10291 | { |
5f5c8ee5 GM |
10292 | /* The function returns -1 if new fonts were loaded, 1 if |
10293 | successful, 0 if not successful. */ | |
10294 | int rc = try_scrolling (window, just_this_one_p, | |
10295 | scroll_conservatively, | |
10296 | scroll_step, | |
10297 | temp_scroll_step); | |
cb617e7c GM |
10298 | switch (rc) |
10299 | { | |
10300 | case SCROLLING_SUCCESS: | |
10301 | goto done; | |
10302 | ||
10303 | case SCROLLING_NEED_LARGER_MATRICES: | |
10304 | goto need_larger_matrices; | |
10305 | ||
10306 | case SCROLLING_FAILED: | |
10307 | break; | |
10308 | ||
10309 | default: | |
10310 | abort (); | |
10311 | } | |
5f5c8ee5 | 10312 | } |
f9c8af06 | 10313 | |
5f5c8ee5 | 10314 | /* Finally, just choose place to start which centers point */ |
5936754e | 10315 | |
5f5c8ee5 | 10316 | recenter: |
44173109 | 10317 | |
5f5c8ee5 GM |
10318 | #if GLYPH_DEBUG |
10319 | debug_method_add (w, "recenter"); | |
10320 | #endif | |
0789adb2 | 10321 | |
5f5c8ee5 | 10322 | /* w->vscroll = 0; */ |
0789adb2 | 10323 | |
5f5c8ee5 GM |
10324 | /* Forget any previously recorded base line for line number display. */ |
10325 | if (!current_matrix_up_to_date_p | |
10326 | || current_buffer->clip_changed) | |
10327 | w->base_line_number = Qnil; | |
10328 | ||
10329 | /* Move backward half the height of the window. */ | |
10330 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10331 | it.current_y = it.last_visible_y; | |
3a030013 | 10332 | move_it_vertically_backward (&it, window_box_height (w) / 2); |
5f5c8ee5 GM |
10333 | xassert (IT_CHARPOS (it) >= BEGV); |
10334 | ||
10335 | /* The function move_it_vertically_backward may move over more | |
10336 | than the specified y-distance. If it->w is small, e.g. a | |
10337 | mini-buffer window, we may end up in front of the window's | |
10338 | display area. Start displaying at the start of the line | |
10339 | containing PT in this case. */ | |
10340 | if (it.current_y <= 0) | |
10341 | { | |
10342 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
10343 | move_it_vertically (&it, 0); | |
10344 | xassert (IT_CHARPOS (it) <= PT); | |
10345 | it.current_y = 0; | |
0789adb2 RS |
10346 | } |
10347 | ||
5f5c8ee5 GM |
10348 | it.current_x = it.hpos = 0; |
10349 | ||
10350 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
10351 | in case the window-scroll-functions functions get errors. */ | |
10352 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
10353 | ||
10354 | /* Run scroll hooks. */ | |
10355 | startp = run_window_scroll_functions (window, it.current.pos); | |
10356 | ||
10357 | /* Redisplay the window. */ | |
10358 | if (!current_matrix_up_to_date_p | |
10359 | || windows_or_buffers_changed | |
10360 | /* Don't use try_window_reusing_current_matrix in this case | |
10361 | because it can have changed the buffer. */ | |
10362 | || !NILP (Vwindow_scroll_functions) | |
10363 | || !just_this_one_p | |
10364 | || MINI_WINDOW_P (w) | |
10365 | || !try_window_reusing_current_matrix (w)) | |
10366 | try_window (window, startp); | |
10367 | ||
10368 | /* If new fonts have been loaded (due to fontsets), give up. We | |
10369 | have to start a new redisplay since we need to re-adjust glyph | |
10370 | matrices. */ | |
10371 | if (fonts_changed_p) | |
cb617e7c | 10372 | goto need_larger_matrices; |
5f5c8ee5 GM |
10373 | |
10374 | /* If cursor did not appear assume that the middle of the window is | |
10375 | in the first line of the window. Do it again with the next line. | |
10376 | (Imagine a window of height 100, displaying two lines of height | |
10377 | 60. Moving back 50 from it->last_visible_y will end in the first | |
10378 | line.) */ | |
10379 | if (w->cursor.vpos < 0) | |
a2889657 | 10380 | { |
5f5c8ee5 GM |
10381 | if (!NILP (w->window_end_valid) |
10382 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 10383 | { |
5f5c8ee5 GM |
10384 | clear_glyph_matrix (w->desired_matrix); |
10385 | move_it_by_lines (&it, 1, 0); | |
10386 | try_window (window, it.current.pos); | |
a2889657 | 10387 | } |
5f5c8ee5 | 10388 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 10389 | { |
5f5c8ee5 GM |
10390 | clear_glyph_matrix (w->desired_matrix); |
10391 | move_it_by_lines (&it, -1, 0); | |
10392 | try_window (window, it.current.pos); | |
10393 | } | |
10394 | else | |
10395 | { | |
10396 | /* Not much we can do about it. */ | |
a2889657 | 10397 | } |
a2889657 | 10398 | } |
010494d0 | 10399 | |
5f5c8ee5 GM |
10400 | /* Consider the following case: Window starts at BEGV, there is |
10401 | invisible, intangible text at BEGV, so that display starts at | |
10402 | some point START > BEGV. It can happen that we are called with | |
10403 | PT somewhere between BEGV and START. Try to handle that case. */ | |
10404 | if (w->cursor.vpos < 0) | |
835766b6 | 10405 | { |
5f5c8ee5 GM |
10406 | struct glyph_row *row = w->current_matrix->rows; |
10407 | if (row->mode_line_p) | |
10408 | ++row; | |
10409 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 10410 | } |
5f5c8ee5 | 10411 | |
cb617e7c GM |
10412 | if (!make_cursor_line_fully_visible (w)) |
10413 | goto need_larger_matrices; | |
b5174a51 | 10414 | |
74d481ac GM |
10415 | done: |
10416 | ||
5f5c8ee5 GM |
10417 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
10418 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
10419 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
10420 | ? Qt : Qnil); | |
a2889657 | 10421 | |
5f5c8ee5 | 10422 | /* Display the mode line, if we must. */ |
e481f960 | 10423 | if ((update_mode_line |
aa6d10fa | 10424 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
10425 | if (a) the window to its side is being redone and |
10426 | (b) we do a frame-based redisplay. This is a consequence | |
10427 | of how inverted lines are drawn in frame-based redisplay. */ | |
10428 | || (!just_this_one_p | |
10429 | && !FRAME_WINDOW_P (f) | |
10430 | && !WINDOW_FULL_WIDTH_P (w)) | |
10431 | /* Line number to display. */ | |
155ef550 | 10432 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 10433 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
10434 | || (!NILP (w->column_number_displayed) |
10435 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
10436 | /* This means that the window has a mode line. */ |
10437 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 10438 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 10439 | { |
5f5c8ee5 GM |
10440 | display_mode_lines (w); |
10441 | ||
10442 | /* If mode line height has changed, arrange for a thorough | |
10443 | immediate redisplay using the correct mode line height. */ | |
10444 | if (WINDOW_WANTS_MODELINE_P (w) | |
10445 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 10446 | { |
5f5c8ee5 GM |
10447 | fonts_changed_p = 1; |
10448 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
10449 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 10450 | } |
5f5c8ee5 GM |
10451 | |
10452 | /* If top line height has changed, arrange for a thorough | |
10453 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
10454 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10455 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
10456 | { |
10457 | fonts_changed_p = 1; | |
045dee35 GM |
10458 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
10459 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
10460 | } |
10461 | ||
10462 | if (fonts_changed_p) | |
cb617e7c | 10463 | goto need_larger_matrices; |
5ba50c51 | 10464 | } |
5f5c8ee5 GM |
10465 | |
10466 | if (!line_number_displayed | |
10467 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
10468 | { |
10469 | w->base_line_pos = Qnil; | |
10470 | w->base_line_number = Qnil; | |
10471 | } | |
a2889657 | 10472 | |
5f5c8ee5 GM |
10473 | finish_menu_bars: |
10474 | ||
7ce2c095 | 10475 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 10476 | if (update_mode_line |
5f5c8ee5 GM |
10477 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
10478 | { | |
10479 | int redisplay_menu_p = 0; | |
10480 | ||
10481 | if (FRAME_WINDOW_P (f)) | |
10482 | { | |
1a578e9b | 10483 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh) |
5f5c8ee5 | 10484 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 10485 | #else |
5f5c8ee5 | 10486 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 10487 | #endif |
5f5c8ee5 GM |
10488 | } |
10489 | else | |
10490 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
10491 | ||
10492 | if (redisplay_menu_p) | |
10493 | display_menu_bar (w); | |
10494 | ||
10495 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
10496 | if (WINDOWP (f->tool_bar_window) |
10497 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
10498 | || auto_resize_tool_bars_p)) | |
10499 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
10500 | #endif |
10501 | } | |
7ce2c095 | 10502 | |
cb617e7c GM |
10503 | need_larger_matrices: |
10504 | ; | |
88f22aff | 10505 | finish_scroll_bars: |
5f5c8ee5 | 10506 | |
88f22aff | 10507 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 10508 | { |
b1d1124b | 10509 | int start, end, whole; |
30c566e4 | 10510 | |
b1d1124b | 10511 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
10512 | At some point, it would be nice to choose between scrollbars |
10513 | which reflect the whole buffer size, with special markers | |
10514 | indicating narrowing, and scrollbars which reflect only the | |
10515 | visible region. | |
10516 | ||
5f5c8ee5 | 10517 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 10518 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 10519 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 10520 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 10521 | { |
8a9311d7 | 10522 | whole = ZV - BEGV; |
4d641a15 | 10523 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
10524 | /* I don't think this is guaranteed to be right. For the |
10525 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 10526 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 10527 | |
5f5c8ee5 GM |
10528 | if (end < start) |
10529 | end = start; | |
10530 | if (whole < (end - start)) | |
10531 | whole = end - start; | |
b1d1124b JB |
10532 | } |
10533 | else | |
10534 | start = end = whole = 0; | |
30c566e4 | 10535 | |
88f22aff | 10536 | /* Indicate what this scroll bar ought to be displaying now. */ |
504454e8 | 10537 | set_vertical_scroll_bar_hook (w, end - start, whole, start); |
30c566e4 | 10538 | |
5f5c8ee5 GM |
10539 | /* Note that we actually used the scroll bar attached to this |
10540 | window, so it shouldn't be deleted at the end of redisplay. */ | |
504454e8 | 10541 | redeem_scroll_bar_hook (w); |
30c566e4 | 10542 | } |
b1d1124b | 10543 | |
5f5c8ee5 GM |
10544 | /* Restore current_buffer and value of point in it. */ |
10545 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 10546 | set_buffer_internal_1 (old); |
5f5c8ee5 | 10547 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
10548 | |
10549 | unbind_to (count, Qnil); | |
a2889657 | 10550 | } |
a2889657 | 10551 | |
5f5c8ee5 GM |
10552 | |
10553 | /* Build the complete desired matrix of WINDOW with a window start | |
10554 | buffer position POS. Value is non-zero if successful. It is zero | |
10555 | if fonts were loaded during redisplay which makes re-adjusting | |
10556 | glyph matrices necessary. */ | |
10557 | ||
10558 | int | |
a2889657 JB |
10559 | try_window (window, pos) |
10560 | Lisp_Object window; | |
5f5c8ee5 GM |
10561 | struct text_pos pos; |
10562 | { | |
10563 | struct window *w = XWINDOW (window); | |
10564 | struct it it; | |
10565 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 10566 | |
5f5c8ee5 GM |
10567 | /* Make POS the new window start. */ |
10568 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 10569 | |
5f5c8ee5 GM |
10570 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
10571 | w->cursor.vpos = -1; | |
a2889657 | 10572 | overlay_arrow_seen = 0; |
642eefc6 | 10573 | |
5f5c8ee5 GM |
10574 | /* Initialize iterator and info to start at POS. */ |
10575 | start_display (&it, w, pos); | |
a2889657 | 10576 | |
5f5c8ee5 GM |
10577 | /* Display all lines of W. */ |
10578 | while (it.current_y < it.last_visible_y) | |
10579 | { | |
10580 | if (display_line (&it)) | |
10581 | last_text_row = it.glyph_row - 1; | |
10582 | if (fonts_changed_p) | |
10583 | return 0; | |
10584 | } | |
a2889657 | 10585 | |
5f5c8ee5 GM |
10586 | /* If bottom moved off end of frame, change mode line percentage. */ |
10587 | if (XFASTINT (w->window_end_pos) <= 0 | |
10588 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
10589 | w->update_mode_line = Qt; |
10590 | ||
5f5c8ee5 GM |
10591 | /* Set window_end_pos to the offset of the last character displayed |
10592 | on the window from the end of current_buffer. Set | |
10593 | window_end_vpos to its row number. */ | |
10594 | if (last_text_row) | |
10595 | { | |
10596 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
10597 | w->window_end_bytepos | |
10598 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10599 | w->window_end_pos |
10600 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10601 | w->window_end_vpos | |
10602 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10603 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) |
10604 | ->displays_text_p); | |
10605 | } | |
10606 | else | |
10607 | { | |
10608 | w->window_end_bytepos = 0; | |
ac90c44f | 10609 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
10610 | } |
10611 | ||
a2889657 JB |
10612 | /* But that is not valid info until redisplay finishes. */ |
10613 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 10614 | return 1; |
a2889657 | 10615 | } |
5f5c8ee5 GM |
10616 | |
10617 | ||
a2889657 | 10618 | \f |
5f5c8ee5 GM |
10619 | /************************************************************************ |
10620 | Window redisplay reusing current matrix when buffer has not changed | |
10621 | ************************************************************************/ | |
10622 | ||
10623 | /* Try redisplay of window W showing an unchanged buffer with a | |
10624 | different window start than the last time it was displayed by | |
10625 | reusing its current matrix. Value is non-zero if successful. | |
10626 | W->start is the new window start. */ | |
a2889657 JB |
10627 | |
10628 | static int | |
5f5c8ee5 GM |
10629 | try_window_reusing_current_matrix (w) |
10630 | struct window *w; | |
a2889657 | 10631 | { |
5f5c8ee5 GM |
10632 | struct frame *f = XFRAME (w->frame); |
10633 | struct glyph_row *row, *bottom_row; | |
10634 | struct it it; | |
10635 | struct run run; | |
10636 | struct text_pos start, new_start; | |
10637 | int nrows_scrolled, i; | |
10638 | struct glyph_row *last_text_row; | |
10639 | struct glyph_row *last_reused_text_row; | |
10640 | struct glyph_row *start_row; | |
10641 | int start_vpos, min_y, max_y; | |
75c5350a | 10642 | |
69d1f7c9 | 10643 | #if GLYPH_DEBUG |
76cb5e06 GM |
10644 | if (inhibit_try_window_reusing) |
10645 | return 0; | |
10646 | #endif | |
10647 | ||
d18354b6 GM |
10648 | if (/* This function doesn't handle terminal frames. */ |
10649 | !FRAME_WINDOW_P (f) | |
10650 | /* Don't try to reuse the display if windows have been split | |
10651 | or such. */ | |
10652 | || windows_or_buffers_changed) | |
5f5c8ee5 | 10653 | return 0; |
a2889657 | 10654 | |
5f5c8ee5 GM |
10655 | /* Can't do this if region may have changed. */ |
10656 | if ((!NILP (Vtransient_mark_mode) | |
10657 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
10658 | || !NILP (w->region_showing) |
10659 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 10660 | return 0; |
a2889657 | 10661 | |
5f5c8ee5 | 10662 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
10663 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
10664 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
10665 | return 0; |
10666 | ||
10667 | /* Give up if old or new display is scrolled vertically. We could | |
10668 | make this function handle this, but right now it doesn't. */ | |
10669 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10670 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
10671 | return 0; | |
10672 | ||
10673 | /* The variable new_start now holds the new window start. The old | |
10674 | start `start' can be determined from the current matrix. */ | |
10675 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
10676 | start = start_row->start.pos; | |
10677 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 10678 | |
5f5c8ee5 GM |
10679 | /* Clear the desired matrix for the display below. */ |
10680 | clear_glyph_matrix (w->desired_matrix); | |
10681 | ||
10682 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
10683 | { | |
10684 | int first_row_y; | |
10685 | ||
607ec83c GM |
10686 | /* Don't use this method if the display starts with an ellipsis |
10687 | displayed for invisible text. It's not easy to handle that case | |
10688 | below, and it's certainly not worth the effort since this is | |
10689 | not a frequent case. */ | |
10690 | if (in_ellipses_for_invisible_text_p (&start_row->start, w)) | |
10691 | return 0; | |
10692 | ||
5f5c8ee5 GM |
10693 | IF_DEBUG (debug_method_add (w, "twu1")); |
10694 | ||
10695 | /* Display up to a row that can be reused. The variable | |
10696 | last_text_row is set to the last row displayed that displays | |
b48f74cb GM |
10697 | text. Note that it.vpos == 0 if or if not there is a |
10698 | header-line; it's not the same as the MATRIX_ROW_VPOS! */ | |
5f5c8ee5 GM |
10699 | start_display (&it, w, new_start); |
10700 | first_row_y = it.current_y; | |
10701 | w->cursor.vpos = -1; | |
10702 | last_text_row = last_reused_text_row = NULL; | |
b48f74cb | 10703 | |
5f5c8ee5 GM |
10704 | while (it.current_y < it.last_visible_y |
10705 | && IT_CHARPOS (it) < CHARPOS (start) | |
10706 | && !fonts_changed_p) | |
10707 | if (display_line (&it)) | |
10708 | last_text_row = it.glyph_row - 1; | |
10709 | ||
10710 | /* A value of current_y < last_visible_y means that we stopped | |
10711 | at the previous window start, which in turn means that we | |
10712 | have at least one reusable row. */ | |
10713 | if (it.current_y < it.last_visible_y) | |
a2889657 | 10714 | { |
b48f74cb | 10715 | /* IT.vpos always starts from 0; it counts text lines. */ |
5f5c8ee5 GM |
10716 | nrows_scrolled = it.vpos; |
10717 | ||
10718 | /* Find PT if not already found in the lines displayed. */ | |
10719 | if (w->cursor.vpos < 0) | |
a2889657 | 10720 | { |
5f5c8ee5 GM |
10721 | int dy = it.current_y - first_row_y; |
10722 | ||
10723 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
0df56f4d GM |
10724 | row = row_containing_pos (w, PT, row, NULL, dy); |
10725 | if (row) | |
10726 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
10727 | dy, nrows_scrolled); | |
10728 | else | |
5f5c8ee5 GM |
10729 | { |
10730 | clear_glyph_matrix (w->desired_matrix); | |
10731 | return 0; | |
10732 | } | |
a2889657 | 10733 | } |
5f5c8ee5 GM |
10734 | |
10735 | /* Scroll the display. Do it before the current matrix is | |
10736 | changed. The problem here is that update has not yet | |
10737 | run, i.e. part of the current matrix is not up to date. | |
10738 | scroll_run_hook will clear the cursor, and use the | |
10739 | current matrix to get the height of the row the cursor is | |
10740 | in. */ | |
10741 | run.current_y = first_row_y; | |
10742 | run.desired_y = it.current_y; | |
10743 | run.height = it.last_visible_y - it.current_y; | |
b48f74cb GM |
10744 | |
10745 | if (run.height > 0 && run.current_y != run.desired_y) | |
a2889657 | 10746 | { |
5f5c8ee5 GM |
10747 | update_begin (f); |
10748 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 10749 | rif->clear_mouse_face (w); |
5f5c8ee5 | 10750 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 10751 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 10752 | update_end (f); |
a2889657 | 10753 | } |
5f5c8ee5 GM |
10754 | |
10755 | /* Shift current matrix down by nrows_scrolled lines. */ | |
10756 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
10757 | rotate_matrix (w->current_matrix, | |
10758 | start_vpos, | |
10759 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
10760 | nrows_scrolled); | |
10761 | ||
9c8b8382 | 10762 | /* Disable lines that must be updated. */ |
5f5c8ee5 | 10763 | for (i = 0; i < it.vpos; ++i) |
b48f74cb | 10764 | (start_row + i)->enabled_p = 0; |
9c8b8382 | 10765 | |
5f5c8ee5 | 10766 | /* Re-compute Y positions. */ |
045dee35 | 10767 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 10768 | max_y = it.last_visible_y; |
b48f74cb GM |
10769 | for (row = start_row + nrows_scrolled; |
10770 | row < bottom_row; | |
10771 | ++row) | |
d2f84654 | 10772 | { |
5f5c8ee5 | 10773 | row->y = it.current_y; |
75c5350a | 10774 | row->visible_height = row->height; |
5f5c8ee5 GM |
10775 | |
10776 | if (row->y < min_y) | |
75c5350a GM |
10777 | row->visible_height -= min_y - row->y; |
10778 | if (row->y + row->height > max_y) | |
10779 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
10780 | |
10781 | it.current_y += row->height; | |
5f5c8ee5 GM |
10782 | |
10783 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
10784 | last_reused_text_row = row; | |
10785 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
10786 | break; | |
d2f84654 | 10787 | } |
9c8b8382 GM |
10788 | |
10789 | /* Disable lines in the current matrix which are now | |
10790 | below the window. */ | |
bafb434c | 10791 | for (++row; row < bottom_row; ++row) |
9c8b8382 | 10792 | row->enabled_p = 0; |
a2889657 | 10793 | } |
5f5c8ee5 GM |
10794 | |
10795 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
10796 | reused row from the current matrix containing text, if any. | |
10797 | The value of last_text_row is the last displayed line | |
10798 | containing text. */ | |
10799 | if (last_reused_text_row) | |
a2889657 | 10800 | { |
5f5c8ee5 GM |
10801 | w->window_end_bytepos |
10802 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
ac90c44f GM |
10803 | w->window_end_pos |
10804 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
10805 | w->window_end_vpos | |
10806 | = make_number (MATRIX_ROW_VPOS (last_reused_text_row, | |
10807 | w->current_matrix)); | |
a2889657 | 10808 | } |
5f5c8ee5 GM |
10809 | else if (last_text_row) |
10810 | { | |
10811 | w->window_end_bytepos | |
10812 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10813 | w->window_end_pos |
10814 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10815 | w->window_end_vpos | |
10816 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10817 | } |
10818 | else | |
10819 | { | |
10820 | /* This window must be completely empty. */ | |
10821 | w->window_end_bytepos = 0; | |
ac90c44f | 10822 | w->window_end_pos = w->window_end_vpos = make_number (0); |
5f5c8ee5 GM |
10823 | } |
10824 | w->window_end_valid = Qnil; | |
a2889657 | 10825 | |
5f5c8ee5 GM |
10826 | /* Update hint: don't try scrolling again in update_window. */ |
10827 | w->desired_matrix->no_scrolling_p = 1; | |
10828 | ||
10829 | #if GLYPH_DEBUG | |
10830 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
10831 | #endif | |
10832 | return 1; | |
a2889657 | 10833 | } |
5f5c8ee5 GM |
10834 | else if (CHARPOS (new_start) > CHARPOS (start)) |
10835 | { | |
10836 | struct glyph_row *pt_row, *row; | |
10837 | struct glyph_row *first_reusable_row; | |
10838 | struct glyph_row *first_row_to_display; | |
10839 | int dy; | |
10840 | int yb = window_text_bottom_y (w); | |
10841 | ||
5f5c8ee5 GM |
10842 | /* Find the row starting at new_start, if there is one. Don't |
10843 | reuse a partially visible line at the end. */ | |
b48f74cb | 10844 | first_reusable_row = start_row; |
5f5c8ee5 GM |
10845 | while (first_reusable_row->enabled_p |
10846 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
10847 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
10848 | < CHARPOS (new_start))) | |
10849 | ++first_reusable_row; | |
10850 | ||
10851 | /* Give up if there is no row to reuse. */ | |
10852 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
10853 | || !first_reusable_row->enabled_p |
10854 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
10855 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
10856 | return 0; |
10857 | ||
5f5c8ee5 GM |
10858 | /* We can reuse fully visible rows beginning with |
10859 | first_reusable_row to the end of the window. Set | |
10860 | first_row_to_display to the first row that cannot be reused. | |
10861 | Set pt_row to the row containing point, if there is any. */ | |
5f5c8ee5 | 10862 | pt_row = NULL; |
ac90c44f GM |
10863 | for (first_row_to_display = first_reusable_row; |
10864 | MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb; | |
10865 | ++first_row_to_display) | |
5f5c8ee5 | 10866 | { |
4bde0ebb GM |
10867 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) |
10868 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
5f5c8ee5 | 10869 | pt_row = first_row_to_display; |
5f5c8ee5 | 10870 | } |
a2889657 | 10871 | |
5f5c8ee5 GM |
10872 | /* Start displaying at the start of first_row_to_display. */ |
10873 | xassert (first_row_to_display->y < yb); | |
10874 | init_to_row_start (&it, w, first_row_to_display); | |
607ec83c | 10875 | |
b48f74cb GM |
10876 | nrows_scrolled = (MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix) |
10877 | - start_vpos); | |
5f5c8ee5 GM |
10878 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) |
10879 | - nrows_scrolled); | |
b48f74cb GM |
10880 | it.current_y = (first_row_to_display->y - first_reusable_row->y |
10881 | + WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); | |
5f5c8ee5 GM |
10882 | |
10883 | /* Display lines beginning with first_row_to_display in the | |
10884 | desired matrix. Set last_text_row to the last row displayed | |
10885 | that displays text. */ | |
10886 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
10887 | if (pt_row == NULL) | |
10888 | w->cursor.vpos = -1; | |
10889 | last_text_row = NULL; | |
10890 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
10891 | if (display_line (&it)) | |
10892 | last_text_row = it.glyph_row - 1; | |
10893 | ||
10894 | /* Give up If point isn't in a row displayed or reused. */ | |
10895 | if (w->cursor.vpos < 0) | |
10896 | { | |
10897 | clear_glyph_matrix (w->desired_matrix); | |
10898 | return 0; | |
10899 | } | |
12adba34 | 10900 | |
5f5c8ee5 GM |
10901 | /* If point is in a reused row, adjust y and vpos of the cursor |
10902 | position. */ | |
10903 | if (pt_row) | |
10904 | { | |
10905 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
10906 | w->current_matrix); | |
10907 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
10908 | } |
10909 | ||
5f5c8ee5 GM |
10910 | /* Scroll the display. */ |
10911 | run.current_y = first_reusable_row->y; | |
045dee35 | 10912 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 10913 | run.height = it.last_visible_y - run.current_y; |
4da61803 GM |
10914 | dy = run.current_y - run.desired_y; |
10915 | ||
5f5c8ee5 GM |
10916 | if (run.height) |
10917 | { | |
10918 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
10919 | update_begin (f); | |
10920 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 10921 | rif->clear_mouse_face (w); |
5f5c8ee5 | 10922 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 10923 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
10924 | update_end (f); |
10925 | } | |
a2889657 | 10926 | |
5f5c8ee5 GM |
10927 | /* Adjust Y positions of reused rows. */ |
10928 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
045dee35 | 10929 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 | 10930 | max_y = it.last_visible_y; |
b48f74cb | 10931 | for (row = first_reusable_row; row < first_row_to_display; ++row) |
5f5c8ee5 GM |
10932 | { |
10933 | row->y -= dy; | |
75c5350a | 10934 | row->visible_height = row->height; |
5f5c8ee5 | 10935 | if (row->y < min_y) |
75c5350a GM |
10936 | row->visible_height -= min_y - row->y; |
10937 | if (row->y + row->height > max_y) | |
10938 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 | 10939 | } |
a2889657 | 10940 | |
5f5c8ee5 GM |
10941 | /* Scroll the current matrix. */ |
10942 | xassert (nrows_scrolled > 0); | |
10943 | rotate_matrix (w->current_matrix, | |
10944 | start_vpos, | |
10945 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
10946 | -nrows_scrolled); | |
10947 | ||
ac90c44f GM |
10948 | /* Disable rows not reused. */ |
10949 | for (row -= nrows_scrolled; row < bottom_row; ++row) | |
10950 | row->enabled_p = 0; | |
10951 | ||
5f5c8ee5 GM |
10952 | /* Adjust window end. A null value of last_text_row means that |
10953 | the window end is in reused rows which in turn means that | |
10954 | only its vpos can have changed. */ | |
10955 | if (last_text_row) | |
10956 | { | |
10957 | w->window_end_bytepos | |
10958 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
10959 | w->window_end_pos |
10960 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10961 | w->window_end_vpos | |
10962 | = make_number (MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
5f5c8ee5 GM |
10963 | } |
10964 | else | |
a2889657 | 10965 | { |
ac90c44f GM |
10966 | w->window_end_vpos |
10967 | = make_number (XFASTINT (w->window_end_vpos) - nrows_scrolled); | |
a2889657 | 10968 | } |
5f5c8ee5 GM |
10969 | |
10970 | w->window_end_valid = Qnil; | |
10971 | w->desired_matrix->no_scrolling_p = 1; | |
10972 | ||
10973 | #if GLYPH_DEBUG | |
10974 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
10975 | #endif | |
10976 | return 1; | |
a2889657 | 10977 | } |
5f5c8ee5 GM |
10978 | |
10979 | return 0; | |
10980 | } | |
a2889657 | 10981 | |
a2889657 | 10982 | |
5f5c8ee5 GM |
10983 | \f |
10984 | /************************************************************************ | |
10985 | Window redisplay reusing current matrix when buffer has changed | |
10986 | ************************************************************************/ | |
10987 | ||
1ec185cb GM |
10988 | static struct glyph_row *find_last_unchanged_at_beg_row P_ ((struct window *)); |
10989 | static struct glyph_row *find_first_unchanged_at_end_row P_ ((struct window *, | |
5f5c8ee5 GM |
10990 | int *, int *)); |
10991 | static struct glyph_row * | |
10992 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
10993 | struct glyph_row *)); | |
10994 | ||
10995 | ||
10996 | /* Return the last row in MATRIX displaying text. If row START is | |
10997 | non-null, start searching with that row. IT gives the dimensions | |
10998 | of the display. Value is null if matrix is empty; otherwise it is | |
10999 | a pointer to the row found. */ | |
11000 | ||
11001 | static struct glyph_row * | |
11002 | find_last_row_displaying_text (matrix, it, start) | |
11003 | struct glyph_matrix *matrix; | |
11004 | struct it *it; | |
11005 | struct glyph_row *start; | |
11006 | { | |
11007 | struct glyph_row *row, *row_found; | |
11008 | ||
11009 | /* Set row_found to the last row in IT->w's current matrix | |
11010 | displaying text. The loop looks funny but think of partially | |
11011 | visible lines. */ | |
11012 | row_found = NULL; | |
11013 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
11014 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11015 | { | |
11016 | xassert (row->enabled_p); | |
11017 | row_found = row; | |
11018 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
11019 | break; | |
11020 | ++row; | |
a2889657 | 11021 | } |
5f5c8ee5 GM |
11022 | |
11023 | return row_found; | |
11024 | } | |
11025 | ||
a2889657 | 11026 | |
5f5c8ee5 | 11027 | /* Return the last row in the current matrix of W that is not affected |
d43fbe9d GM |
11028 | by changes at the start of current_buffer that occurred since W's |
11029 | current matrix was built. Value is null if no such row exists. | |
a2889657 | 11030 | |
d43fbe9d GM |
11031 | BEG_UNCHANGED us the number of characters unchanged at the start of |
11032 | current_buffer. BEG + BEG_UNCHANGED is the buffer position of the | |
11033 | first changed character in current_buffer. Characters at positions < | |
11034 | BEG + BEG_UNCHANGED are at the same buffer positions as they were | |
11035 | when the current matrix was built. */ | |
5f5c8ee5 GM |
11036 | |
11037 | static struct glyph_row * | |
1ec185cb | 11038 | find_last_unchanged_at_beg_row (w) |
5f5c8ee5 GM |
11039 | struct window *w; |
11040 | { | |
9142dd5b | 11041 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
11042 | struct glyph_row *row; |
11043 | struct glyph_row *row_found = NULL; | |
11044 | int yb = window_text_bottom_y (w); | |
11045 | ||
11046 | /* Find the last row displaying unchanged text. */ | |
11047 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11048 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
11049 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 11050 | { |
5f5c8ee5 GM |
11051 | if (/* If row ends before first_changed_pos, it is unchanged, |
11052 | except in some case. */ | |
11053 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
11054 | /* When row ends in ZV and we write at ZV it is not | |
11055 | unchanged. */ | |
11056 | && !row->ends_at_zv_p | |
11057 | /* When first_changed_pos is the end of a continued line, | |
11058 | row is not unchanged because it may be no longer | |
11059 | continued. */ | |
11060 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
11061 | && row->continued_p)) | |
11062 | row_found = row; | |
11063 | ||
11064 | /* Stop if last visible row. */ | |
11065 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
11066 | break; | |
11067 | ||
11068 | ++row; | |
a2889657 JB |
11069 | } |
11070 | ||
5f5c8ee5 | 11071 | return row_found; |
a2889657 | 11072 | } |
5f5c8ee5 GM |
11073 | |
11074 | ||
11075 | /* Find the first glyph row in the current matrix of W that is not | |
d43fbe9d GM |
11076 | affected by changes at the end of current_buffer since the |
11077 | time W's current matrix was built. | |
11078 | ||
11079 | Return in *DELTA the number of chars by which buffer positions in | |
11080 | unchanged text at the end of current_buffer must be adjusted. | |
11081 | ||
11082 | Return in *DELTA_BYTES the corresponding number of bytes. | |
11083 | ||
11084 | Value is null if no such row exists, i.e. all rows are affected by | |
11085 | changes. */ | |
5f5c8ee5 GM |
11086 | |
11087 | static struct glyph_row * | |
1ec185cb | 11088 | find_first_unchanged_at_end_row (w, delta, delta_bytes) |
5f5c8ee5 GM |
11089 | struct window *w; |
11090 | int *delta, *delta_bytes; | |
a2889657 | 11091 | { |
5f5c8ee5 GM |
11092 | struct glyph_row *row; |
11093 | struct glyph_row *row_found = NULL; | |
c581d710 | 11094 | |
5f5c8ee5 | 11095 | *delta = *delta_bytes = 0; |
b2a76982 | 11096 | |
1ec185cb GM |
11097 | /* Display must not have been paused, otherwise the current matrix |
11098 | is not up to date. */ | |
11099 | if (NILP (w->window_end_valid)) | |
11100 | abort (); | |
11101 | ||
11102 | /* A value of window_end_pos >= END_UNCHANGED means that the window | |
5f5c8ee5 GM |
11103 | end is in the range of changed text. If so, there is no |
11104 | unchanged row at the end of W's current matrix. */ | |
9142dd5b | 11105 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
11106 | return NULL; |
11107 | ||
11108 | /* Set row to the last row in W's current matrix displaying text. */ | |
11109 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
11110 | ||
5f5c8ee5 GM |
11111 | /* If matrix is entirely empty, no unchanged row exists. */ |
11112 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
11113 | { | |
11114 | /* The value of row is the last glyph row in the matrix having a | |
11115 | meaningful buffer position in it. The end position of row | |
11116 | corresponds to window_end_pos. This allows us to translate | |
11117 | buffer positions in the current matrix to current buffer | |
11118 | positions for characters not in changed text. */ | |
11119 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11120 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11121 | int last_unchanged_pos, last_unchanged_pos_old; | |
11122 | struct glyph_row *first_text_row | |
11123 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
11124 | ||
11125 | *delta = Z - Z_old; | |
11126 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
11127 | ||
11128 | /* Set last_unchanged_pos to the buffer position of the last | |
11129 | character in the buffer that has not been changed. Z is the | |
d43fbe9d GM |
11130 | index + 1 of the last character in current_buffer, i.e. by |
11131 | subtracting END_UNCHANGED we get the index of the last | |
5f5c8ee5 GM |
11132 | unchanged character, and we have to add BEG to get its buffer |
11133 | position. */ | |
9142dd5b | 11134 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
11135 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
11136 | ||
11137 | /* Search backward from ROW for a row displaying a line that | |
11138 | starts at a minimum position >= last_unchanged_pos_old. */ | |
1ec185cb | 11139 | for (; row > first_text_row; --row) |
5f5c8ee5 | 11140 | { |
1ec185cb GM |
11141 | if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
11142 | abort (); | |
5f5c8ee5 GM |
11143 | |
11144 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
11145 | row_found = row; | |
5f5c8ee5 GM |
11146 | } |
11147 | } | |
11148 | ||
1ec185cb GM |
11149 | if (row_found && !MATRIX_ROW_DISPLAYS_TEXT_P (row_found)) |
11150 | abort (); | |
11151 | ||
5f5c8ee5 | 11152 | return row_found; |
c581d710 RS |
11153 | } |
11154 | ||
c581d710 | 11155 | |
5f5c8ee5 GM |
11156 | /* Make sure that glyph rows in the current matrix of window W |
11157 | reference the same glyph memory as corresponding rows in the | |
11158 | frame's frame matrix. This function is called after scrolling W's | |
11159 | current matrix on a terminal frame in try_window_id and | |
11160 | try_window_reusing_current_matrix. */ | |
11161 | ||
11162 | static void | |
11163 | sync_frame_with_window_matrix_rows (w) | |
11164 | struct window *w; | |
c581d710 | 11165 | { |
5f5c8ee5 GM |
11166 | struct frame *f = XFRAME (w->frame); |
11167 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
11168 | ||
11169 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
11170 | must have a frame matrix. */ | |
11171 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
11172 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
11173 | xassert (!FRAME_WINDOW_P (f)); | |
11174 | ||
11175 | /* If W is a full-width window, glyph pointers in W's current matrix | |
11176 | have, by definition, to be the same as glyph pointers in the | |
11177 | corresponding frame matrix. */ | |
11178 | window_row = w->current_matrix->rows; | |
11179 | window_row_end = window_row + w->current_matrix->nrows; | |
11180 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
11181 | while (window_row < window_row_end) | |
659a218f | 11182 | { |
5f5c8ee5 | 11183 | int area; |
f002db93 | 11184 | |
5f5c8ee5 GM |
11185 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) |
11186 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
f002db93 GM |
11187 | |
11188 | /* Disable frame rows whose corresponding window rows have | |
11189 | been disabled in try_window_id. */ | |
11190 | if (!window_row->enabled_p) | |
11191 | frame_row->enabled_p = 0; | |
11192 | ||
5f5c8ee5 | 11193 | ++window_row, ++frame_row; |
659a218f | 11194 | } |
a2889657 | 11195 | } |
5f5c8ee5 GM |
11196 | |
11197 | ||
e037b9ec GM |
11198 | /* Find the glyph row in window W containing CHARPOS. Consider all |
11199 | rows between START and END (not inclusive). END null means search | |
11200 | all rows to the end of the display area of W. Value is the row | |
11201 | containing CHARPOS or null. */ | |
11202 | ||
0bef35bc | 11203 | struct glyph_row * |
0df56f4d | 11204 | row_containing_pos (w, charpos, start, end, dy) |
e037b9ec GM |
11205 | struct window *w; |
11206 | int charpos; | |
11207 | struct glyph_row *start, *end; | |
0df56f4d | 11208 | int dy; |
e037b9ec GM |
11209 | { |
11210 | struct glyph_row *row = start; | |
11211 | int last_y; | |
11212 | ||
11213 | /* If we happen to start on a header-line, skip that. */ | |
11214 | if (row->mode_line_p) | |
11215 | ++row; | |
11216 | ||
11217 | if ((end && row >= end) || !row->enabled_p) | |
11218 | return NULL; | |
11219 | ||
0df56f4d | 11220 | last_y = window_text_bottom_y (w) - dy; |
e037b9ec GM |
11221 | |
11222 | while ((end == NULL || row < end) | |
0df56f4d | 11223 | && MATRIX_ROW_BOTTOM_Y (row) < last_y |
e037b9ec | 11224 | && (MATRIX_ROW_END_CHARPOS (row) < charpos |
e037b9ec | 11225 | || (MATRIX_ROW_END_CHARPOS (row) == charpos |
0df56f4d GM |
11226 | /* The end position of a row equals the start |
11227 | position of the next row. If CHARPOS is there, we | |
11228 | would rather display it in the next line, except | |
11229 | when this line ends in ZV. */ | |
11230 | && !row->ends_at_zv_p | |
11231 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)))) | |
e037b9ec GM |
11232 | ++row; |
11233 | ||
11234 | /* Give up if CHARPOS not found. */ | |
11235 | if ((end && row >= end) | |
11236 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
11237 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
11238 | row = NULL; | |
11239 | ||
11240 | return row; | |
11241 | } | |
11242 | ||
11243 | ||
5f5c8ee5 GM |
11244 | /* Try to redisplay window W by reusing its existing display. W's |
11245 | current matrix must be up to date when this function is called, | |
11246 | i.e. window_end_valid must not be nil. | |
11247 | ||
11248 | Value is | |
11249 | ||
11250 | 1 if display has been updated | |
11251 | 0 if otherwise unsuccessful | |
11252 | -1 if redisplay with same window start is known not to succeed | |
11253 | ||
11254 | The following steps are performed: | |
11255 | ||
11256 | 1. Find the last row in the current matrix of W that is not | |
11257 | affected by changes at the start of current_buffer. If no such row | |
11258 | is found, give up. | |
11259 | ||
11260 | 2. Find the first row in W's current matrix that is not affected by | |
11261 | changes at the end of current_buffer. Maybe there is no such row. | |
11262 | ||
11263 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
11264 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
11265 | the window. | |
11266 | ||
11267 | 4. If cursor is not known to appear on the window, give up. | |
11268 | ||
11269 | 5. If display stopped at the row found in step 2, scroll the | |
11270 | display and current matrix as needed. | |
11271 | ||
11272 | 6. Maybe display some lines at the end of W, if we must. This can | |
11273 | happen under various circumstances, like a partially visible line | |
11274 | becoming fully visible, or because newly displayed lines are displayed | |
11275 | in smaller font sizes. | |
11276 | ||
11277 | 7. Update W's window end information. */ | |
11278 | ||
12adba34 | 11279 | static int |
5f5c8ee5 | 11280 | try_window_id (w) |
12adba34 | 11281 | struct window *w; |
12adba34 | 11282 | { |
5f5c8ee5 GM |
11283 | struct frame *f = XFRAME (w->frame); |
11284 | struct glyph_matrix *current_matrix = w->current_matrix; | |
11285 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
11286 | struct glyph_row *last_unchanged_at_beg_row; | |
11287 | struct glyph_row *first_unchanged_at_end_row; | |
11288 | struct glyph_row *row; | |
11289 | struct glyph_row *bottom_row; | |
11290 | int bottom_vpos; | |
11291 | struct it it; | |
11292 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
11293 | struct text_pos start_pos; | |
11294 | struct run run; | |
11295 | int first_unchanged_at_end_vpos = 0; | |
11296 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
11297 | struct text_pos start; | |
27d16f05 | 11298 | int first_changed_charpos, last_changed_charpos; |
5f5c8ee5 | 11299 | |
69d1f7c9 | 11300 | #if GLYPH_DEBUG |
76cb5e06 GM |
11301 | if (inhibit_try_window_id) |
11302 | return 0; | |
11303 | #endif | |
11304 | ||
27d16f05 GM |
11305 | /* This is handy for debugging. */ |
11306 | #if 0 | |
11307 | #define GIVE_UP(X) \ | |
11308 | do { \ | |
11309 | fprintf (stderr, "try_window_id give up %d\n", (X)); \ | |
11310 | return 0; \ | |
11311 | } while (0) | |
11312 | #else | |
62397849 | 11313 | #define GIVE_UP(X) return 0 |
27d16f05 GM |
11314 | #endif |
11315 | ||
5f5c8ee5 GM |
11316 | SET_TEXT_POS_FROM_MARKER (start, w->start); |
11317 | ||
27d16f05 GM |
11318 | /* Don't use this for mini-windows because these can show |
11319 | messages and mini-buffers, and we don't handle that here. */ | |
11320 | if (MINI_WINDOW_P (w)) | |
11321 | GIVE_UP (1); | |
11322 | ||
11323 | /* This flag is used to prevent redisplay optimizations. */ | |
11324 | if (windows_or_buffers_changed) | |
11325 | GIVE_UP (2); | |
11326 | ||
f5376658 | 11327 | /* Verify that narrowing has not changed. This flag is also set to prevent |
27d16f05 GM |
11328 | redisplay optimizations. It would be nice to further |
11329 | reduce the number of cases where this prevents try_window_id. */ | |
11330 | if (current_buffer->clip_changed) | |
11331 | GIVE_UP (3); | |
11332 | ||
11333 | /* Window must either use window-based redisplay or be full width. */ | |
11334 | if (!FRAME_WINDOW_P (f) | |
11335 | && (!line_ins_del_ok | |
11336 | || !WINDOW_FULL_WIDTH_P (w))) | |
11337 | GIVE_UP (4); | |
5f5c8ee5 | 11338 | |
f5376658 | 11339 | /* Give up if point is not known NOT to appear in W. */ |
27d16f05 GM |
11340 | if (PT < CHARPOS (start)) |
11341 | GIVE_UP (5); | |
11342 | ||
11343 | /* Another way to prevent redisplay optimizations. */ | |
11344 | if (XFASTINT (w->last_modified) == 0) | |
11345 | GIVE_UP (6); | |
11346 | ||
f5376658 | 11347 | /* Verify that window is not hscrolled. */ |
27d16f05 GM |
11348 | if (XFASTINT (w->hscroll) != 0) |
11349 | GIVE_UP (7); | |
11350 | ||
f5376658 | 11351 | /* Verify that display wasn't paused. */ |
27d16f05 GM |
11352 | if (NILP (w->window_end_valid)) |
11353 | GIVE_UP (8); | |
11354 | ||
11355 | /* Can't use this if highlighting a region because a cursor movement | |
11356 | will do more than just set the cursor. */ | |
11357 | if (!NILP (Vtransient_mark_mode) | |
11358 | && !NILP (current_buffer->mark_active)) | |
11359 | GIVE_UP (9); | |
11360 | ||
11361 | /* Likewise if highlighting trailing whitespace. */ | |
11362 | if (!NILP (Vshow_trailing_whitespace)) | |
11363 | GIVE_UP (11); | |
11364 | ||
11365 | /* Likewise if showing a region. */ | |
11366 | if (!NILP (w->region_showing)) | |
11367 | GIVE_UP (10); | |
11368 | ||
11369 | /* Can use this if overlay arrow position and or string have changed. */ | |
11370 | if (!EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) | |
11371 | || !EQ (last_arrow_string, Voverlay_arrow_string)) | |
11372 | GIVE_UP (12); | |
11373 | ||
11374 | ||
5f5c8ee5 GM |
11375 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it |
11376 | only if buffer has really changed. The reason is that the gap is | |
11377 | initially at Z for freshly visited files. The code below would | |
11378 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
11379 | if (MODIFF > SAVE_MODIFF |
11380 | /* This seems to happen sometimes after saving a buffer. */ | |
11381 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 11382 | { |
9142dd5b GM |
11383 | if (GPT - BEG < BEG_UNCHANGED) |
11384 | BEG_UNCHANGED = GPT - BEG; | |
11385 | if (Z - GPT < END_UNCHANGED) | |
11386 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 11387 | } |
bf9249e3 | 11388 | |
27d16f05 GM |
11389 | /* The position of the first and last character that has been changed. */ |
11390 | first_changed_charpos = BEG + BEG_UNCHANGED; | |
11391 | last_changed_charpos = Z - END_UNCHANGED; | |
11392 | ||
5f5c8ee5 GM |
11393 | /* If window starts after a line end, and the last change is in |
11394 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
11395 | This case happens with stealth-fontification. Note that although |
11396 | the display is unchanged, glyph positions in the matrix have to | |
11397 | be adjusted, of course. */ | |
5f5c8ee5 | 11398 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
27d16f05 | 11399 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row) |
e60f4527 | 11400 | && ((last_changed_charpos < CHARPOS (start) |
27d16f05 | 11401 | && CHARPOS (start) == BEGV) |
e60f4527 | 11402 | || (last_changed_charpos < CHARPOS (start) - 1 |
27d16f05 GM |
11403 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n'))) |
11404 | { | |
11405 | int Z_old, delta, Z_BYTE_old, delta_bytes; | |
11406 | struct glyph_row *r0; | |
11407 | ||
11408 | /* Compute how many chars/bytes have been added to or removed | |
11409 | from the buffer. */ | |
11410 | Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
11411 | Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
11412 | delta = Z - Z_old; | |
11413 | delta_bytes = Z_BYTE - Z_BYTE_old; | |
11414 | ||
11415 | /* Give up if PT is not in the window. Note that it already has | |
11416 | been checked at the start of try_window_id that PT is not in | |
11417 | front of the window start. */ | |
11418 | if (PT >= MATRIX_ROW_END_CHARPOS (row) + delta) | |
11419 | GIVE_UP (13); | |
11420 | ||
11421 | /* If window start is unchanged, we can reuse the whole matrix | |
11422 | as is, after adjusting glyph positions. No need to compute | |
11423 | the window end again, since its offset from Z hasn't changed. */ | |
11424 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11425 | if (CHARPOS (start) == MATRIX_ROW_START_CHARPOS (r0) + delta | |
11426 | && BYTEPOS (start) == MATRIX_ROW_START_BYTEPOS (r0) + delta_bytes) | |
11427 | { | |
11428 | /* Adjust positions in the glyph matrix. */ | |
11429 | if (delta || delta_bytes) | |
11430 | { | |
11431 | struct glyph_row *r1 | |
11432 | = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11433 | increment_matrix_positions (w->current_matrix, | |
11434 | MATRIX_ROW_VPOS (r0, current_matrix), | |
11435 | MATRIX_ROW_VPOS (r1, current_matrix), | |
11436 | delta, delta_bytes); | |
11437 | } | |
e5959a9a | 11438 | |
27d16f05 | 11439 | /* Set the cursor. */ |
0df56f4d | 11440 | row = row_containing_pos (w, PT, r0, NULL, 0); |
27d16f05 GM |
11441 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); |
11442 | return 1; | |
11443 | } | |
5f5c8ee5 GM |
11444 | } |
11445 | ||
27d16f05 | 11446 | /* Handle the case that changes are all below what is displayed in |
33ea6c4d | 11447 | the window, and that PT is in the window. This shortcut cannot |
2b9c25e0 GM |
11448 | be taken if ZV is visible in the window, and text has been added |
11449 | there that is visible in the window. */ | |
11450 | if (first_changed_charpos >= MATRIX_ROW_END_CHARPOS (row) | |
33ea6c4d GM |
11451 | /* ZV is not visible in the window, or there are no |
11452 | changes at ZV, actually. */ | |
11453 | && (current_matrix->zv > MATRIX_ROW_END_CHARPOS (row) | |
11454 | || first_changed_charpos == last_changed_charpos)) | |
5f5c8ee5 | 11455 | { |
27d16f05 | 11456 | struct glyph_row *r0; |
ef121659 | 11457 | |
27d16f05 GM |
11458 | /* Give up if PT is not in the window. Note that it already has |
11459 | been checked at the start of try_window_id that PT is not in | |
11460 | front of the window start. */ | |
11461 | if (PT >= MATRIX_ROW_END_CHARPOS (row)) | |
11462 | GIVE_UP (14); | |
11463 | ||
11464 | /* If window start is unchanged, we can reuse the whole matrix | |
11465 | as is, without changing glyph positions since no text has | |
11466 | been added/removed in front of the window end. */ | |
11467 | r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); | |
11468 | if (TEXT_POS_EQUAL_P (start, r0->start.pos)) | |
11469 | { | |
11470 | /* We have to compute the window end anew since text | |
11471 | can have been added/removed after it. */ | |
11472 | w->window_end_pos | |
11473 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
11474 | w->window_end_bytepos | |
11475 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
11476 | ||
11477 | /* Set the cursor. */ | |
0df56f4d | 11478 | row = row_containing_pos (w, PT, r0, NULL, 0); |
27d16f05 GM |
11479 | set_cursor_from_row (w, row, current_matrix, 0, 0, 0, 0); |
11480 | return 2; | |
11481 | } | |
5f5c8ee5 GM |
11482 | } |
11483 | ||
2b9c25e0 GM |
11484 | /* Give up if window start is in the changed area. |
11485 | ||
11486 | The condition used to read | |
11487 | ||
11488 | (BEG_UNCHANGED + END_UNCHANGED != Z - BEG && ...) | |
11489 | ||
11490 | but why that was tested escapes me at the moment. */ | |
11491 | if (CHARPOS (start) >= first_changed_charpos | |
27d16f05 GM |
11492 | && CHARPOS (start) <= last_changed_charpos) |
11493 | GIVE_UP (15); | |
11494 | ||
f5376658 RS |
11495 | /* Check that window start agrees with the start of the first glyph |
11496 | row in its current matrix. Check this after we know the window | |
11497 | start is not in changed text, otherwise positions would not be | |
11498 | comparable. */ | |
27d16f05 | 11499 | row = MATRIX_FIRST_TEXT_ROW (current_matrix); |
5f5c8ee5 | 11500 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) |
27d16f05 | 11501 | GIVE_UP (16); |
5f5c8ee5 | 11502 | |
23e8bd86 GM |
11503 | /* Give up if the window ends in strings. Overlay strings |
11504 | at the end are difficult to handle, so don't try. */ | |
11505 | row = MATRIX_ROW (current_matrix, XFASTINT (w->window_end_vpos)); | |
11506 | if (MATRIX_ROW_START_CHARPOS (row) == MATRIX_ROW_END_CHARPOS (row)) | |
11507 | GIVE_UP (20); | |
11508 | ||
5f5c8ee5 GM |
11509 | /* Compute the position at which we have to start displaying new |
11510 | lines. Some of the lines at the top of the window might be | |
11511 | reusable because they are not displaying changed text. Find the | |
11512 | last row in W's current matrix not affected by changes at the | |
11513 | start of current_buffer. Value is null if changes start in the | |
11514 | first line of window. */ | |
1ec185cb | 11515 | last_unchanged_at_beg_row = find_last_unchanged_at_beg_row (w); |
5f5c8ee5 GM |
11516 | if (last_unchanged_at_beg_row) |
11517 | { | |
67f1cf4c GM |
11518 | /* Avoid starting to display in the moddle of a character, a TAB |
11519 | for instance. This is easier than to set up the iterator | |
11520 | exactly, and it's not a frequent case, so the additional | |
11521 | effort wouldn't really pay off. */ | |
e74fb0f7 GM |
11522 | while ((MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row) |
11523 | || last_unchanged_at_beg_row->ends_in_newline_from_string_p) | |
67f1cf4c GM |
11524 | && last_unchanged_at_beg_row > w->current_matrix->rows) |
11525 | --last_unchanged_at_beg_row; | |
11526 | ||
11527 | if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row)) | |
27d16f05 | 11528 | GIVE_UP (17); |
47d57b22 GM |
11529 | |
11530 | if (init_to_row_end (&it, w, last_unchanged_at_beg_row) == 0) | |
11531 | GIVE_UP (18); | |
5f5c8ee5 GM |
11532 | start_pos = it.current.pos; |
11533 | ||
11534 | /* Start displaying new lines in the desired matrix at the same | |
11535 | vpos we would use in the current matrix, i.e. below | |
11536 | last_unchanged_at_beg_row. */ | |
11537 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
11538 | current_matrix); | |
11539 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
11540 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
11541 | ||
11542 | xassert (it.hpos == 0 && it.current_x == 0); | |
11543 | } | |
11544 | else | |
11545 | { | |
11546 | /* There are no reusable lines at the start of the window. | |
11547 | Start displaying in the first line. */ | |
11548 | start_display (&it, w, start); | |
11549 | start_pos = it.current.pos; | |
11550 | } | |
11551 | ||
5f5c8ee5 GM |
11552 | /* Find the first row that is not affected by changes at the end of |
11553 | the buffer. Value will be null if there is no unchanged row, in | |
11554 | which case we must redisplay to the end of the window. delta | |
11555 | will be set to the value by which buffer positions beginning with | |
11556 | first_unchanged_at_end_row have to be adjusted due to text | |
11557 | changes. */ | |
11558 | first_unchanged_at_end_row | |
1ec185cb | 11559 | = find_first_unchanged_at_end_row (w, &delta, &delta_bytes); |
5f5c8ee5 GM |
11560 | IF_DEBUG (debug_delta = delta); |
11561 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
11562 | ||
11563 | /* Set stop_pos to the buffer position up to which we will have to | |
11564 | display new lines. If first_unchanged_at_end_row != NULL, this | |
11565 | is the buffer position of the start of the line displayed in that | |
11566 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
11567 | that we don't stop at a buffer position. */ | |
11568 | stop_pos = 0; | |
11569 | if (first_unchanged_at_end_row) | |
11570 | { | |
11571 | xassert (last_unchanged_at_beg_row == NULL | |
11572 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
11573 | ||
11574 | /* If this is a continuation line, move forward to the next one | |
11575 | that isn't. Changes in lines above affect this line. | |
11576 | Caution: this may move first_unchanged_at_end_row to a row | |
11577 | not displaying text. */ | |
11578 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
11579 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
11580 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
11581 | < it.last_visible_y)) | |
11582 | ++first_unchanged_at_end_row; | |
11583 | ||
11584 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
11585 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
11586 | >= it.last_visible_y)) | |
11587 | first_unchanged_at_end_row = NULL; | |
11588 | else | |
11589 | { | |
11590 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
11591 | + delta); | |
11592 | first_unchanged_at_end_vpos | |
11593 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 11594 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
11595 | } |
11596 | } | |
11597 | else if (last_unchanged_at_beg_row == NULL) | |
23e8bd86 | 11598 | GIVE_UP (19); |
5f5c8ee5 GM |
11599 | |
11600 | ||
11601 | #if GLYPH_DEBUG | |
11602 | ||
11603 | /* Either there is no unchanged row at the end, or the one we have | |
11604 | now displays text. This is a necessary condition for the window | |
11605 | end pos calculation at the end of this function. */ | |
11606 | xassert (first_unchanged_at_end_row == NULL | |
11607 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
11608 | ||
11609 | debug_last_unchanged_at_beg_vpos | |
11610 | = (last_unchanged_at_beg_row | |
11611 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
11612 | : -1); | |
11613 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
11614 | ||
11615 | #endif /* GLYPH_DEBUG != 0 */ | |
11616 | ||
33ea6c4d | 11617 | |
5f5c8ee5 GM |
11618 | /* Display new lines. Set last_text_row to the last new line |
11619 | displayed which has text on it, i.e. might end up as being the | |
11620 | line where the window_end_vpos is. */ | |
11621 | w->cursor.vpos = -1; | |
11622 | last_text_row = NULL; | |
11623 | overlay_arrow_seen = 0; | |
11624 | while (it.current_y < it.last_visible_y | |
11625 | && !fonts_changed_p | |
11626 | && (first_unchanged_at_end_row == NULL | |
11627 | || IT_CHARPOS (it) < stop_pos)) | |
11628 | { | |
11629 | if (display_line (&it)) | |
11630 | last_text_row = it.glyph_row - 1; | |
11631 | } | |
11632 | ||
11633 | if (fonts_changed_p) | |
11634 | return -1; | |
11635 | ||
11636 | ||
11637 | /* Compute differences in buffer positions, y-positions etc. for | |
11638 | lines reused at the bottom of the window. Compute what we can | |
11639 | scroll. */ | |
ca42b2e8 GM |
11640 | if (first_unchanged_at_end_row |
11641 | /* No lines reused because we displayed everything up to the | |
11642 | bottom of the window. */ | |
11643 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
11644 | { |
11645 | dvpos = (it.vpos | |
11646 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
11647 | current_matrix)); | |
11648 | dy = it.current_y - first_unchanged_at_end_row->y; | |
11649 | run.current_y = first_unchanged_at_end_row->y; | |
11650 | run.desired_y = run.current_y + dy; | |
11651 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
11652 | } | |
11653 | else | |
ca42b2e8 GM |
11654 | { |
11655 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
11656 | first_unchanged_at_end_row = NULL; | |
11657 | } | |
5f5c8ee5 GM |
11658 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
11659 | ||
8f8ba186 | 11660 | |
5f5c8ee5 GM |
11661 | /* Find the cursor if not already found. We have to decide whether |
11662 | PT will appear on this window (it sometimes doesn't, but this is | |
11663 | not a very frequent case.) This decision has to be made before | |
11664 | the current matrix is altered. A value of cursor.vpos < 0 means | |
11665 | that PT is either in one of the lines beginning at | |
11666 | first_unchanged_at_end_row or below the window. Don't care for | |
11667 | lines that might be displayed later at the window end; as | |
11668 | mentioned, this is not a frequent case. */ | |
11669 | if (w->cursor.vpos < 0) | |
11670 | { | |
5f5c8ee5 GM |
11671 | /* Cursor in unchanged rows at the top? */ |
11672 | if (PT < CHARPOS (start_pos) | |
11673 | && last_unchanged_at_beg_row) | |
11674 | { | |
e037b9ec GM |
11675 | row = row_containing_pos (w, PT, |
11676 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
0df56f4d | 11677 | last_unchanged_at_beg_row + 1, 0); |
bfe0ee88 GM |
11678 | if (row) |
11679 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
11680 | } |
11681 | ||
11682 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
11683 | else if (first_unchanged_at_end_row) | |
11684 | { | |
e037b9ec | 11685 | row = row_containing_pos (w, PT - delta, |
0df56f4d | 11686 | first_unchanged_at_end_row, NULL, 0); |
e037b9ec | 11687 | if (row) |
468155d7 GM |
11688 | set_cursor_from_row (w, row, w->current_matrix, delta, |
11689 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
11690 | } |
11691 | ||
11692 | /* Give up if cursor was not found. */ | |
11693 | if (w->cursor.vpos < 0) | |
11694 | { | |
11695 | clear_glyph_matrix (w->desired_matrix); | |
11696 | return -1; | |
11697 | } | |
11698 | } | |
11699 | ||
11700 | /* Don't let the cursor end in the scroll margins. */ | |
11701 | { | |
11702 | int this_scroll_margin, cursor_height; | |
11703 | ||
11704 | this_scroll_margin = max (0, scroll_margin); | |
11705 | this_scroll_margin = min (this_scroll_margin, | |
11706 | XFASTINT (w->height) / 4); | |
11707 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
11708 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
11709 | ||
11710 | if ((w->cursor.y < this_scroll_margin | |
11711 | && CHARPOS (start) > BEGV) | |
11712 | /* Don't take scroll margin into account at the bottom because | |
11713 | old redisplay didn't do it either. */ | |
11714 | || w->cursor.y + cursor_height > it.last_visible_y) | |
11715 | { | |
11716 | w->cursor.vpos = -1; | |
11717 | clear_glyph_matrix (w->desired_matrix); | |
11718 | return -1; | |
11719 | } | |
11720 | } | |
11721 | ||
11722 | /* Scroll the display. Do it before changing the current matrix so | |
11723 | that xterm.c doesn't get confused about where the cursor glyph is | |
11724 | found. */ | |
fa77249f | 11725 | if (dy && run.height) |
5f5c8ee5 GM |
11726 | { |
11727 | update_begin (f); | |
11728 | ||
11729 | if (FRAME_WINDOW_P (f)) | |
11730 | { | |
11731 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 11732 | rif->clear_mouse_face (w); |
5f5c8ee5 | 11733 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 11734 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
11735 | } |
11736 | else | |
11737 | { | |
11738 | /* Terminal frame. In this case, dvpos gives the number of | |
11739 | lines to scroll by; dvpos < 0 means scroll up. */ | |
11740 | int first_unchanged_at_end_vpos | |
11741 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
11742 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
522ed7fb GM |
11743 | int end = (XFASTINT (w->top) |
11744 | + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0) | |
11745 | + window_internal_height (w)); | |
5f5c8ee5 GM |
11746 | |
11747 | /* Perform the operation on the screen. */ | |
11748 | if (dvpos > 0) | |
11749 | { | |
11750 | /* Scroll last_unchanged_at_beg_row to the end of the | |
11751 | window down dvpos lines. */ | |
11752 | set_terminal_window (end); | |
11753 | ||
11754 | /* On dumb terminals delete dvpos lines at the end | |
11755 | before inserting dvpos empty lines. */ | |
11756 | if (!scroll_region_ok) | |
11757 | ins_del_lines (end - dvpos, -dvpos); | |
11758 | ||
11759 | /* Insert dvpos empty lines in front of | |
11760 | last_unchanged_at_beg_row. */ | |
11761 | ins_del_lines (from, dvpos); | |
11762 | } | |
11763 | else if (dvpos < 0) | |
11764 | { | |
11765 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
11766 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
11767 | set_terminal_window (end); | |
11768 | ||
11769 | /* Delete dvpos lines in front of | |
11770 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
11771 | the cursor to the given vpos and emit |dvpos| delete | |
11772 | line sequences. */ | |
11773 | ins_del_lines (from + dvpos, dvpos); | |
11774 | ||
11775 | /* On a dumb terminal insert dvpos empty lines at the | |
11776 | end. */ | |
11777 | if (!scroll_region_ok) | |
11778 | ins_del_lines (end + dvpos, -dvpos); | |
11779 | } | |
11780 | ||
11781 | set_terminal_window (0); | |
11782 | } | |
11783 | ||
11784 | update_end (f); | |
11785 | } | |
11786 | ||
ca42b2e8 GM |
11787 | /* Shift reused rows of the current matrix to the right position. |
11788 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
11789 | text. */ | |
11790 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
11791 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
11792 | if (dvpos < 0) |
11793 | { | |
11794 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
11795 | bottom_vpos, dvpos); | |
11796 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
11797 | bottom_vpos, 0); | |
11798 | } | |
11799 | else if (dvpos > 0) | |
11800 | { | |
11801 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
11802 | bottom_vpos, dvpos); | |
11803 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
11804 | first_unchanged_at_end_vpos + dvpos, 0); | |
11805 | } | |
11806 | ||
11807 | /* For frame-based redisplay, make sure that current frame and window | |
11808 | matrix are in sync with respect to glyph memory. */ | |
11809 | if (!FRAME_WINDOW_P (f)) | |
11810 | sync_frame_with_window_matrix_rows (w); | |
11811 | ||
11812 | /* Adjust buffer positions in reused rows. */ | |
11813 | if (delta) | |
f2d86d7a GM |
11814 | increment_matrix_positions (current_matrix, |
11815 | first_unchanged_at_end_vpos + dvpos, | |
11816 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
11817 | |
11818 | /* Adjust Y positions. */ | |
11819 | if (dy) | |
11820 | shift_glyph_matrix (w, current_matrix, | |
11821 | first_unchanged_at_end_vpos + dvpos, | |
11822 | bottom_vpos, dy); | |
11823 | ||
11824 | if (first_unchanged_at_end_row) | |
11825 | first_unchanged_at_end_row += dvpos; | |
11826 | ||
11827 | /* If scrolling up, there may be some lines to display at the end of | |
11828 | the window. */ | |
11829 | last_text_row_at_end = NULL; | |
11830 | if (dy < 0) | |
11831 | { | |
9c6ba6d1 GM |
11832 | /* Scrolling up can leave for example a partially visible line |
11833 | at the end of the window to be redisplayed. */ | |
5f5c8ee5 GM |
11834 | /* Set last_row to the glyph row in the current matrix where the |
11835 | window end line is found. It has been moved up or down in | |
11836 | the matrix by dvpos. */ | |
11837 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
11838 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
11839 | ||
11840 | /* If last_row is the window end line, it should display text. */ | |
11841 | xassert (last_row->displays_text_p); | |
11842 | ||
11843 | /* If window end line was partially visible before, begin | |
11844 | displaying at that line. Otherwise begin displaying with the | |
11845 | line following it. */ | |
11846 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
11847 | { | |
11848 | init_to_row_start (&it, w, last_row); | |
11849 | it.vpos = last_vpos; | |
11850 | it.current_y = last_row->y; | |
11851 | } | |
11852 | else | |
11853 | { | |
11854 | init_to_row_end (&it, w, last_row); | |
11855 | it.vpos = 1 + last_vpos; | |
11856 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
11857 | ++last_row; | |
11858 | } | |
12adba34 | 11859 | |
23e8bd86 GM |
11860 | /* We may start in a continuation line. If so, we have to |
11861 | get the right continuation_lines_width and current_x. */ | |
11862 | it.continuation_lines_width = last_row->continuation_lines_width; | |
11863 | it.hpos = it.current_x = 0; | |
11864 | ||
11865 | /* Display the rest of the lines at the window end. */ | |
11866 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
11867 | while (it.current_y < it.last_visible_y | |
11868 | && !fonts_changed_p) | |
5f5c8ee5 | 11869 | { |
23e8bd86 GM |
11870 | /* Is it always sure that the display agrees with lines in |
11871 | the current matrix? I don't think so, so we mark rows | |
11872 | displayed invalid in the current matrix by setting their | |
11873 | enabled_p flag to zero. */ | |
11874 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
11875 | if (display_line (&it)) | |
11876 | last_text_row_at_end = it.glyph_row - 1; | |
5f5c8ee5 GM |
11877 | } |
11878 | } | |
12adba34 | 11879 | |
5f5c8ee5 GM |
11880 | /* Update window_end_pos and window_end_vpos. */ |
11881 | if (first_unchanged_at_end_row | |
11882 | && first_unchanged_at_end_row->y < it.last_visible_y | |
11883 | && !last_text_row_at_end) | |
11884 | { | |
11885 | /* Window end line if one of the preserved rows from the current | |
11886 | matrix. Set row to the last row displaying text in current | |
11887 | matrix starting at first_unchanged_at_end_row, after | |
11888 | scrolling. */ | |
11889 | xassert (first_unchanged_at_end_row->displays_text_p); | |
11890 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
11891 | first_unchanged_at_end_row); | |
11892 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
11893 | ||
ac90c44f | 11894 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
5f5c8ee5 | 11895 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ac90c44f GM |
11896 | w->window_end_vpos |
11897 | = make_number (MATRIX_ROW_VPOS (row, w->current_matrix)); | |
23fca891 | 11898 | xassert (w->window_end_bytepos >= 0); |
0416532f | 11899 | IF_DEBUG (debug_method_add (w, "A")); |
5f5c8ee5 GM |
11900 | } |
11901 | else if (last_text_row_at_end) | |
11902 | { | |
ac90c44f GM |
11903 | w->window_end_pos |
11904 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
5f5c8ee5 GM |
11905 | w->window_end_bytepos |
11906 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
ac90c44f GM |
11907 | w->window_end_vpos |
11908 | = make_number (MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
23fca891 | 11909 | xassert (w->window_end_bytepos >= 0); |
0416532f | 11910 | IF_DEBUG (debug_method_add (w, "B")); |
5f5c8ee5 GM |
11911 | } |
11912 | else if (last_text_row) | |
11913 | { | |
11914 | /* We have displayed either to the end of the window or at the | |
11915 | end of the window, i.e. the last row with text is to be found | |
11916 | in the desired matrix. */ | |
ac90c44f GM |
11917 | w->window_end_pos |
11918 | = make_number (Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
5f5c8ee5 GM |
11919 | w->window_end_bytepos |
11920 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
ac90c44f GM |
11921 | w->window_end_vpos |
11922 | = make_number (MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
23fca891 | 11923 | xassert (w->window_end_bytepos >= 0); |
5f5c8ee5 GM |
11924 | } |
11925 | else if (first_unchanged_at_end_row == NULL | |
11926 | && last_text_row == NULL | |
11927 | && last_text_row_at_end == NULL) | |
11928 | { | |
11929 | /* Displayed to end of window, but no line containing text was | |
11930 | displayed. Lines were deleted at the end of the window. */ | |
0416532f GM |
11931 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
11932 | int vpos = XFASTINT (w->window_end_vpos); | |
11933 | struct glyph_row *current_row = current_matrix->rows + vpos; | |
11934 | struct glyph_row *desired_row = desired_matrix->rows + vpos; | |
11935 | ||
11936 | for (row = NULL; | |
11937 | row == NULL && vpos >= first_vpos; | |
11938 | --vpos, --current_row, --desired_row) | |
11939 | { | |
11940 | if (desired_row->enabled_p) | |
11941 | { | |
11942 | if (desired_row->displays_text_p) | |
11943 | row = desired_row; | |
11944 | } | |
11945 | else if (current_row->displays_text_p) | |
11946 | row = current_row; | |
11947 | } | |
12adba34 | 11948 | |
0416532f | 11949 | xassert (row != NULL); |
d88a79d4 | 11950 | w->window_end_vpos = make_number (vpos + 1); |
8c56a983 GM |
11951 | w->window_end_pos = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); |
11952 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
23fca891 | 11953 | xassert (w->window_end_bytepos >= 0); |
0416532f | 11954 | IF_DEBUG (debug_method_add (w, "C")); |
5f5c8ee5 GM |
11955 | } |
11956 | else | |
11957 | abort (); | |
ac90c44f | 11958 | |
8cdb267e GM |
11959 | #if 0 /* This leads to problems, for instance when the cursor is |
11960 | at ZV, and the cursor line displays no text. */ | |
ac90c44f GM |
11961 | /* Disable rows below what's displayed in the window. This makes |
11962 | debugging easier. */ | |
11963 | enable_glyph_matrix_rows (current_matrix, | |
11964 | XFASTINT (w->window_end_vpos) + 1, | |
11965 | bottom_vpos, 0); | |
8cdb267e | 11966 | #endif |
23e8bd86 | 11967 | |
5f5c8ee5 GM |
11968 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); |
11969 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 11970 | |
5f5c8ee5 GM |
11971 | /* Record that display has not been completed. */ |
11972 | w->window_end_valid = Qnil; | |
11973 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 11974 | return 3; |
27d16f05 GM |
11975 | |
11976 | #undef GIVE_UP | |
12adba34 | 11977 | } |
0f9c0ff0 | 11978 | |
a2889657 | 11979 | |
5f5c8ee5 GM |
11980 | \f |
11981 | /*********************************************************************** | |
11982 | More debugging support | |
11983 | ***********************************************************************/ | |
a2889657 | 11984 | |
5f5c8ee5 | 11985 | #if GLYPH_DEBUG |
a2889657 | 11986 | |
eaaa65b0 | 11987 | void dump_glyph_row P_ ((struct glyph_row *, int, int)); |
9ab436b9 | 11988 | void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); |
e187cf71 | 11989 | void dump_glyph P_ ((struct glyph_row *, struct glyph *, int)); |
1c9241f5 | 11990 | |
31b24551 | 11991 | |
9ab436b9 | 11992 | /* Dump the contents of glyph matrix MATRIX on stderr. |
ca26e1c8 | 11993 | |
9ab436b9 GM |
11994 | GLYPHS 0 means don't show glyph contents. |
11995 | GLYPHS 1 means show glyphs in short form | |
11996 | GLYPHS > 1 means show glyphs in long form. */ | |
11997 | ||
11998 | void | |
11999 | dump_glyph_matrix (matrix, glyphs) | |
5f5c8ee5 | 12000 | struct glyph_matrix *matrix; |
9ab436b9 | 12001 | int glyphs; |
5f5c8ee5 | 12002 | { |
efc63ef0 | 12003 | int i; |
5f5c8ee5 | 12004 | for (i = 0; i < matrix->nrows; ++i) |
eaaa65b0 | 12005 | dump_glyph_row (MATRIX_ROW (matrix, i), i, glyphs); |
5f5c8ee5 | 12006 | } |
31b24551 | 12007 | |
68a37fa8 | 12008 | |
e187cf71 GM |
12009 | /* Dump contents of glyph GLYPH to stderr. ROW and AREA are |
12010 | the glyph row and area where the glyph comes from. */ | |
12011 | ||
12012 | void | |
12013 | dump_glyph (row, glyph, area) | |
12014 | struct glyph_row *row; | |
12015 | struct glyph *glyph; | |
12016 | int area; | |
12017 | { | |
12018 | if (glyph->type == CHAR_GLYPH) | |
12019 | { | |
12020 | fprintf (stderr, | |
12021 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12022 | glyph - row->glyphs[TEXT_AREA], | |
12023 | 'C', | |
12024 | glyph->charpos, | |
12025 | (BUFFERP (glyph->object) | |
12026 | ? 'B' | |
12027 | : (STRINGP (glyph->object) | |
12028 | ? 'S' | |
12029 | : '-')), | |
12030 | glyph->pixel_width, | |
12031 | glyph->u.ch, | |
12032 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
12033 | ? glyph->u.ch | |
12034 | : '.'), | |
12035 | glyph->face_id, | |
12036 | glyph->left_box_line_p, | |
12037 | glyph->right_box_line_p); | |
12038 | } | |
12039 | else if (glyph->type == STRETCH_GLYPH) | |
12040 | { | |
12041 | fprintf (stderr, | |
12042 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12043 | glyph - row->glyphs[TEXT_AREA], | |
12044 | 'S', | |
12045 | glyph->charpos, | |
12046 | (BUFFERP (glyph->object) | |
12047 | ? 'B' | |
12048 | : (STRINGP (glyph->object) | |
12049 | ? 'S' | |
12050 | : '-')), | |
12051 | glyph->pixel_width, | |
12052 | 0, | |
12053 | '.', | |
12054 | glyph->face_id, | |
12055 | glyph->left_box_line_p, | |
12056 | glyph->right_box_line_p); | |
12057 | } | |
12058 | else if (glyph->type == IMAGE_GLYPH) | |
12059 | { | |
12060 | fprintf (stderr, | |
12061 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
12062 | glyph - row->glyphs[TEXT_AREA], | |
12063 | 'I', | |
12064 | glyph->charpos, | |
12065 | (BUFFERP (glyph->object) | |
12066 | ? 'B' | |
12067 | : (STRINGP (glyph->object) | |
12068 | ? 'S' | |
12069 | : '-')), | |
12070 | glyph->pixel_width, | |
12071 | glyph->u.img_id, | |
12072 | '.', | |
12073 | glyph->face_id, | |
12074 | glyph->left_box_line_p, | |
12075 | glyph->right_box_line_p); | |
12076 | } | |
12077 | } | |
12078 | ||
12079 | ||
5f5c8ee5 | 12080 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9ab436b9 GM |
12081 | GLYPHS 0 means don't show glyph contents. |
12082 | GLYPHS 1 means show glyphs in short form | |
12083 | GLYPHS > 1 means show glyphs in long form. */ | |
a2889657 | 12084 | |
5f5c8ee5 | 12085 | void |
eaaa65b0 GM |
12086 | dump_glyph_row (row, vpos, glyphs) |
12087 | struct glyph_row *row; | |
9ab436b9 | 12088 | int vpos, glyphs; |
5f5c8ee5 | 12089 | { |
9ab436b9 GM |
12090 | if (glyphs != 1) |
12091 | { | |
b94c0d9c | 12092 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n"); |
9ab436b9 | 12093 | fprintf (stderr, "=======================================================================\n"); |
5f5c8ee5 | 12094 | |
0ad38729 | 12095 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d\ |
33ea6c4d | 12096 | %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 | 12097 | vpos, |
9ab436b9 GM |
12098 | MATRIX_ROW_START_CHARPOS (row), |
12099 | MATRIX_ROW_END_CHARPOS (row), | |
12100 | row->used[TEXT_AREA], | |
12101 | row->contains_overlapping_glyphs_p, | |
12102 | row->enabled_p, | |
9ab436b9 GM |
12103 | row->truncated_on_left_p, |
12104 | row->truncated_on_right_p, | |
12105 | row->overlay_arrow_p, | |
12106 | row->continued_p, | |
12107 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
12108 | row->displays_text_p, | |
12109 | row->ends_at_zv_p, | |
12110 | row->fill_line_p, | |
12111 | row->ends_in_middle_of_char_p, | |
12112 | row->starts_in_middle_of_char_p, | |
b94c0d9c | 12113 | row->mouse_face_p, |
9ab436b9 GM |
12114 | row->x, |
12115 | row->y, | |
12116 | row->pixel_width, | |
12117 | row->height, | |
12118 | row->visible_height, | |
12119 | row->ascent, | |
12120 | row->phys_ascent); | |
33ea6c4d GM |
12121 | fprintf (stderr, "%9d %5d\t%5d\n", row->start.overlay_string_index, |
12122 | row->end.overlay_string_index, | |
12123 | row->continuation_lines_width); | |
9ab436b9 GM |
12124 | fprintf (stderr, "%9d %5d\n", |
12125 | CHARPOS (row->start.string_pos), | |
12126 | CHARPOS (row->end.string_pos)); | |
12127 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
12128 | row->end.dpvec_index); | |
12129 | } | |
5f5c8ee5 | 12130 | |
9ab436b9 | 12131 | if (glyphs > 1) |
bd66d1ba | 12132 | { |
e187cf71 GM |
12133 | int area; |
12134 | ||
12135 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12136 | { | |
091f8878 GM |
12137 | struct glyph *glyph = row->glyphs[area]; |
12138 | struct glyph *glyph_end = glyph + row->used[area]; | |
5f5c8ee5 | 12139 | |
e187cf71 | 12140 | /* Glyph for a line end in text. */ |
091f8878 | 12141 | if (area == TEXT_AREA && glyph == glyph_end && glyph->charpos > 0) |
e187cf71 | 12142 | ++glyph_end; |
5f5c8ee5 | 12143 | |
e187cf71 GM |
12144 | if (glyph < glyph_end) |
12145 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); | |
5f5c8ee5 | 12146 | |
e187cf71 GM |
12147 | for (; glyph < glyph_end; ++glyph) |
12148 | dump_glyph (row, glyph, area); | |
f7b4b63a | 12149 | } |
f4faa47c | 12150 | } |
9ab436b9 GM |
12151 | else if (glyphs == 1) |
12152 | { | |
e187cf71 | 12153 | int area; |
9ab436b9 | 12154 | |
e187cf71 | 12155 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) |
9ab436b9 | 12156 | { |
e187cf71 GM |
12157 | char *s = (char *) alloca (row->used[area] + 1); |
12158 | int i; | |
12159 | ||
12160 | for (i = 0; i < row->used[area]; ++i) | |
12161 | { | |
12162 | struct glyph *glyph = row->glyphs[area] + i; | |
12163 | if (glyph->type == CHAR_GLYPH | |
12164 | && glyph->u.ch < 0x80 | |
12165 | && glyph->u.ch >= ' ') | |
12166 | s[i] = glyph->u.ch; | |
12167 | else | |
12168 | s[i] = '.'; | |
12169 | } | |
9ab436b9 | 12170 | |
e187cf71 GM |
12171 | s[i] = '\0'; |
12172 | fprintf (stderr, "%3d: (%d) '%s'\n", vpos, row->enabled_p, s); | |
12173 | } | |
9ab436b9 | 12174 | } |
5f5c8ee5 | 12175 | } |
f4faa47c | 12176 | |
a2889657 | 12177 | |
5f5c8ee5 GM |
12178 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
12179 | Sdump_glyph_matrix, 0, 1, "p", | |
7ee72033 | 12180 | doc: /* Dump the current matrix of the selected window to stderr. |
228299fa GM |
12181 | Shows contents of glyph row structures. With non-nil |
12182 | parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show | |
7ee72033 MB |
12183 | glyphs in short form, otherwise show glyphs in long form. */) |
12184 | (glyphs) | |
9ab436b9 | 12185 | Lisp_Object glyphs; |
5f5c8ee5 GM |
12186 | { |
12187 | struct window *w = XWINDOW (selected_window); | |
12188 | struct buffer *buffer = XBUFFER (w->buffer); | |
12189 | ||
12190 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
12191 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
12192 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
12193 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
12194 | fprintf (stderr, "=============================================\n"); | |
9ab436b9 GM |
12195 | dump_glyph_matrix (w->current_matrix, |
12196 | NILP (glyphs) ? 0 : XINT (glyphs)); | |
5f5c8ee5 GM |
12197 | return Qnil; |
12198 | } | |
1c2250c2 | 12199 | |
1fca3fae | 12200 | |
e9abc296 | 12201 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 2, "", |
7ee72033 | 12202 | doc: /* Dump glyph row ROW to stderr. |
228299fa GM |
12203 | GLYPH 0 means don't dump glyphs. |
12204 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12205 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12206 | (row, glyphs) | |
e9abc296 | 12207 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12208 | { |
eaaa65b0 GM |
12209 | struct glyph_matrix *matrix; |
12210 | int vpos; | |
12211 | ||
b7826503 | 12212 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12213 | matrix = XWINDOW (selected_window)->current_matrix; |
12214 | vpos = XINT (row); | |
12215 | if (vpos >= 0 && vpos < matrix->nrows) | |
12216 | dump_glyph_row (MATRIX_ROW (matrix, vpos), | |
12217 | vpos, | |
12218 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12219 | return Qnil; |
12220 | } | |
1fca3fae | 12221 | |
67481ae5 | 12222 | |
b94c0d9c | 12223 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, 1, 2, "", |
c2552f79 | 12224 | doc: /* Dump glyph row ROW of the tool-bar of the current frame to stderr. |
228299fa GM |
12225 | GLYPH 0 means don't dump glyphs. |
12226 | GLYPH 1 means dump glyphs in short form. | |
7ee72033 MB |
12227 | GLYPH > 1 or omitted means dump glyphs in long form. */) |
12228 | (row, glyphs) | |
b94c0d9c | 12229 | Lisp_Object row, glyphs; |
5f5c8ee5 | 12230 | { |
886bd6f2 | 12231 | struct frame *sf = SELECTED_FRAME (); |
eaaa65b0 GM |
12232 | struct glyph_matrix *m = XWINDOW (sf->tool_bar_window)->current_matrix; |
12233 | int vpos; | |
12234 | ||
b7826503 | 12235 | CHECK_NUMBER (row); |
eaaa65b0 GM |
12236 | vpos = XINT (row); |
12237 | if (vpos >= 0 && vpos < m->nrows) | |
12238 | dump_glyph_row (MATRIX_ROW (m, vpos), vpos, | |
12239 | INTEGERP (glyphs) ? XINT (glyphs) : 2); | |
5f5c8ee5 GM |
12240 | return Qnil; |
12241 | } | |
ca26e1c8 | 12242 | |
0f9c0ff0 | 12243 | |
62397849 | 12244 | DEFUN ("trace-redisplay", Ftrace_redisplay, Strace_redisplay, 0, 1, "P", |
7ee72033 MB |
12245 | doc: /* Toggle tracing of redisplay. |
12246 | With ARG, turn tracing on if and only if ARG is positive. */) | |
12247 | (arg) | |
62397849 | 12248 | Lisp_Object arg; |
5f5c8ee5 | 12249 | { |
62397849 GM |
12250 | if (NILP (arg)) |
12251 | trace_redisplay_p = !trace_redisplay_p; | |
12252 | else | |
12253 | { | |
12254 | arg = Fprefix_numeric_value (arg); | |
12255 | trace_redisplay_p = XINT (arg) > 0; | |
12256 | } | |
12257 | ||
5f5c8ee5 GM |
12258 | return Qnil; |
12259 | } | |
bf9249e3 GM |
12260 | |
12261 | ||
f4a374a1 | 12262 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, MANY, "", |
7ee72033 MB |
12263 | doc: /* Like `format', but print result to stderr. */) |
12264 | (nargs, args) | |
f4a374a1 GM |
12265 | int nargs; |
12266 | Lisp_Object *args; | |
bf9249e3 | 12267 | { |
f4a374a1 GM |
12268 | Lisp_Object s = Fformat (nargs, args); |
12269 | fprintf (stderr, "%s", XSTRING (s)->data); | |
bf9249e3 GM |
12270 | return Qnil; |
12271 | } | |
5f5c8ee5 GM |
12272 | |
12273 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 12274 | |
ca26e1c8 | 12275 | |
5f5c8ee5 GM |
12276 | \f |
12277 | /*********************************************************************** | |
12278 | Building Desired Matrix Rows | |
12279 | ***********************************************************************/ | |
a2889657 | 12280 | |
5f5c8ee5 GM |
12281 | /* Return a temporary glyph row holding the glyphs of an overlay |
12282 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 12283 | |
5f5c8ee5 GM |
12284 | static struct glyph_row * |
12285 | get_overlay_arrow_glyph_row (w) | |
12286 | struct window *w; | |
12287 | { | |
12288 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
12289 | struct buffer *buffer = XBUFFER (w->buffer); | |
12290 | struct buffer *old = current_buffer; | |
12291 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
12292 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
12293 | unsigned char *arrow_end = arrow_string + arrow_len; | |
12294 | unsigned char *p; | |
12295 | struct it it; | |
12296 | int multibyte_p; | |
12297 | int n_glyphs_before; | |
12298 | ||
12299 | set_buffer_temp (buffer); | |
12300 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
12301 | it.glyph_row->used[TEXT_AREA] = 0; | |
12302 | SET_TEXT_POS (it.position, 0, 0); | |
12303 | ||
12304 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
12305 | p = arrow_string; | |
12306 | while (p < arrow_end) | |
12307 | { | |
12308 | Lisp_Object face, ilisp; | |
12309 | ||
12310 | /* Get the next character. */ | |
12311 | if (multibyte_p) | |
4fdb80f2 | 12312 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
12313 | else |
12314 | it.c = *p, it.len = 1; | |
12315 | p += it.len; | |
12316 | ||
12317 | /* Get its face. */ | |
ac90c44f | 12318 | ilisp = make_number (p - arrow_string); |
5f5c8ee5 GM |
12319 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); |
12320 | it.face_id = compute_char_face (f, it.c, face); | |
12321 | ||
12322 | /* Compute its width, get its glyphs. */ | |
12323 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 12324 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
12325 | PRODUCE_GLYPHS (&it); |
12326 | ||
12327 | /* If this character doesn't fit any more in the line, we have | |
12328 | to remove some glyphs. */ | |
12329 | if (it.current_x > it.last_visible_x) | |
12330 | { | |
12331 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
12332 | break; | |
12333 | } | |
12334 | } | |
12335 | ||
12336 | set_buffer_temp (old); | |
12337 | return it.glyph_row; | |
12338 | } | |
ca26e1c8 | 12339 | |
b0a0fbda | 12340 | |
5f5c8ee5 GM |
12341 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
12342 | glyphs are only inserted for terminal frames since we can't really | |
12343 | win with truncation glyphs when partially visible glyphs are | |
12344 | involved. Which glyphs to insert is determined by | |
12345 | produce_special_glyphs. */ | |
67481ae5 | 12346 | |
5f5c8ee5 GM |
12347 | static void |
12348 | insert_left_trunc_glyphs (it) | |
12349 | struct it *it; | |
12350 | { | |
12351 | struct it truncate_it; | |
12352 | struct glyph *from, *end, *to, *toend; | |
12353 | ||
12354 | xassert (!FRAME_WINDOW_P (it->f)); | |
12355 | ||
12356 | /* Get the truncation glyphs. */ | |
12357 | truncate_it = *it; | |
5f5c8ee5 GM |
12358 | truncate_it.current_x = 0; |
12359 | truncate_it.face_id = DEFAULT_FACE_ID; | |
12360 | truncate_it.glyph_row = &scratch_glyph_row; | |
12361 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
12362 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 12363 | truncate_it.object = make_number (0); |
5f5c8ee5 GM |
12364 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
12365 | ||
12366 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
12367 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12368 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
12369 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
12370 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
12371 | ||
12372 | while (from < end) | |
12373 | *to++ = *from++; | |
12374 | ||
37be86f2 KH |
12375 | /* There may be padding glyphs left over. Overwrite them too. */ |
12376 | while (to < toend && CHAR_GLYPH_PADDING_P (*to)) | |
12377 | { | |
12378 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
12379 | while (from < end) | |
12380 | *to++ = *from++; | |
12381 | } | |
5f5c8ee5 | 12382 | |
37be86f2 KH |
12383 | if (to > toend) |
12384 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
5f5c8ee5 | 12385 | } |
e0bfbde6 | 12386 | |
e0bfbde6 | 12387 | |
5f5c8ee5 | 12388 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 12389 | |
5f5c8ee5 GM |
12390 | Most of the time, ascent and height of a display line will be equal |
12391 | to the max_ascent and max_height values of the display iterator | |
12392 | structure. This is not the case if | |
67481ae5 | 12393 | |
5f5c8ee5 GM |
12394 | 1. We hit ZV without displaying anything. In this case, max_ascent |
12395 | and max_height will be zero. | |
1c9241f5 | 12396 | |
5f5c8ee5 GM |
12397 | 2. We have some glyphs that don't contribute to the line height. |
12398 | (The glyph row flag contributes_to_line_height_p is for future | |
12399 | pixmap extensions). | |
f6fd109b | 12400 | |
5f5c8ee5 GM |
12401 | The first case is easily covered by using default values because in |
12402 | these cases, the line height does not really matter, except that it | |
12403 | must not be zero. */ | |
67481ae5 | 12404 | |
5f5c8ee5 GM |
12405 | static void |
12406 | compute_line_metrics (it) | |
12407 | struct it *it; | |
12408 | { | |
12409 | struct glyph_row *row = it->glyph_row; | |
12410 | int area, i; | |
1c2250c2 | 12411 | |
5f5c8ee5 GM |
12412 | if (FRAME_WINDOW_P (it->f)) |
12413 | { | |
75c5350a | 12414 | int i, min_y, max_y; |
1c2250c2 | 12415 | |
5f5c8ee5 GM |
12416 | /* The line may consist of one space only, that was added to |
12417 | place the cursor on it. If so, the row's height hasn't been | |
12418 | computed yet. */ | |
12419 | if (row->height == 0) | |
12420 | { | |
12421 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 12422 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
12423 | row->ascent = it->max_ascent; |
12424 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12425 | row->phys_ascent = it->max_phys_ascent; |
12426 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
12427 | } |
12428 | ||
12429 | /* Compute the width of this line. */ | |
12430 | row->pixel_width = row->x; | |
12431 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
12432 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
12433 | ||
12434 | xassert (row->pixel_width >= 0); | |
12435 | xassert (row->ascent >= 0 && row->height > 0); | |
12436 | ||
312246d1 GM |
12437 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
12438 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
12439 | ||
12440 | /* If first line's physical ascent is larger than its logical | |
12441 | ascent, use the physical ascent, and make the row taller. | |
12442 | This makes accented characters fully visible. */ | |
b28cb6ed | 12443 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
12444 | && row->phys_ascent > row->ascent) |
12445 | { | |
12446 | row->height += row->phys_ascent - row->ascent; | |
12447 | row->ascent = row->phys_ascent; | |
12448 | } | |
12449 | ||
5f5c8ee5 GM |
12450 | /* Compute how much of the line is visible. */ |
12451 | row->visible_height = row->height; | |
12452 | ||
75c5350a GM |
12453 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
12454 | max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
12455 | ||
12456 | if (row->y < min_y) | |
12457 | row->visible_height -= min_y - row->y; | |
12458 | if (row->y + row->height > max_y) | |
12459 | row->visible_height -= row->y + row->height - max_y; | |
5f5c8ee5 GM |
12460 | } |
12461 | else | |
12462 | { | |
12463 | row->pixel_width = row->used[TEXT_AREA]; | |
33ea6c4d GM |
12464 | if (row->continued_p) |
12465 | row->pixel_width -= it->continuation_pixel_width; | |
12466 | else if (row->truncated_on_right_p) | |
12467 | row->pixel_width -= it->truncation_pixel_width; | |
312246d1 GM |
12468 | row->ascent = row->phys_ascent = 0; |
12469 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 12470 | } |
67481ae5 | 12471 | |
5f5c8ee5 GM |
12472 | /* Compute a hash code for this row. */ |
12473 | row->hash = 0; | |
12474 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
12475 | for (i = 0; i < row->used[area]; ++i) | |
12476 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
12477 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
12478 | + row->glyphs[area][i].face_id |
12479 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 12480 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 12481 | |
5f5c8ee5 | 12482 | it->max_ascent = it->max_descent = 0; |
312246d1 | 12483 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 12484 | } |
12adba34 | 12485 | |
ca26e1c8 | 12486 | |
5f5c8ee5 GM |
12487 | /* Append one space to the glyph row of iterator IT if doing a |
12488 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
12489 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 12490 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
12491 | |
12492 | This function is called to make sure that there is always one glyph | |
12493 | at the end of a glyph row that the cursor can be set on under | |
12494 | window-systems. (If there weren't such a glyph we would not know | |
12495 | how wide and tall a box cursor should be displayed). | |
12496 | ||
12497 | At the same time this space let's a nicely handle clearing to the | |
12498 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 12499 | |
80c6cb1f | 12500 | static int |
5f5c8ee5 GM |
12501 | append_space (it, default_face_p) |
12502 | struct it *it; | |
12503 | int default_face_p; | |
12504 | { | |
12505 | if (FRAME_WINDOW_P (it->f)) | |
12506 | { | |
12507 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 12508 | |
5f5c8ee5 GM |
12509 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
12510 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 12511 | { |
cafafe0b GM |
12512 | /* Save some values that must not be changed. |
12513 | Must save IT->c and IT->len because otherwise | |
12514 | ITERATOR_AT_END_P wouldn't work anymore after | |
12515 | append_space has been called. */ | |
478d746b | 12516 | enum display_element_type saved_what = it->what; |
cafafe0b GM |
12517 | int saved_c = it->c, saved_len = it->len; |
12518 | int saved_x = it->current_x; | |
5f5c8ee5 | 12519 | int saved_face_id = it->face_id; |
cafafe0b | 12520 | struct text_pos saved_pos; |
5f5c8ee5 | 12521 | Lisp_Object saved_object; |
980806b6 | 12522 | struct face *face; |
5f5c8ee5 GM |
12523 | |
12524 | saved_object = it->object; | |
12525 | saved_pos = it->position; | |
12526 | ||
12527 | it->what = IT_CHARACTER; | |
12528 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12529 | it->object = make_number (0); |
5f5c8ee5 GM |
12530 | it->c = ' '; |
12531 | it->len = 1; | |
5f5c8ee5 GM |
12532 | |
12533 | if (default_face_p) | |
12534 | it->face_id = DEFAULT_FACE_ID; | |
4aad61f8 GM |
12535 | else if (it->face_before_selective_p) |
12536 | it->face_id = it->saved_face_id; | |
980806b6 KH |
12537 | face = FACE_FROM_ID (it->f, it->face_id); |
12538 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 12539 | |
5f5c8ee5 GM |
12540 | PRODUCE_GLYPHS (it); |
12541 | ||
12542 | it->current_x = saved_x; | |
12543 | it->object = saved_object; | |
12544 | it->position = saved_pos; | |
12545 | it->what = saved_what; | |
12546 | it->face_id = saved_face_id; | |
cafafe0b GM |
12547 | it->len = saved_len; |
12548 | it->c = saved_c; | |
80c6cb1f | 12549 | return 1; |
5f5c8ee5 GM |
12550 | } |
12551 | } | |
80c6cb1f GM |
12552 | |
12553 | return 0; | |
5f5c8ee5 | 12554 | } |
12adba34 | 12555 | |
1842fc1a | 12556 | |
5f5c8ee5 GM |
12557 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
12558 | to the end of the display line. Called from display_line. | |
12559 | If the glyph row is empty, add a space glyph to it so that we | |
12560 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
12561 | ||
12562 | static void | |
12563 | extend_face_to_end_of_line (it) | |
12564 | struct it *it; | |
12565 | { | |
12566 | struct face *face; | |
12567 | struct frame *f = it->f; | |
1842fc1a | 12568 | |
5f5c8ee5 GM |
12569 | /* If line is already filled, do nothing. */ |
12570 | if (it->current_x >= it->last_visible_x) | |
12571 | return; | |
12572 | ||
12573 | /* Face extension extends the background and box of IT->face_id | |
12574 | to the end of the line. If the background equals the background | |
4aad61f8 GM |
12575 | of the frame, we don't have to do anything. */ |
12576 | if (it->face_before_selective_p) | |
12577 | face = FACE_FROM_ID (it->f, it->saved_face_id); | |
12578 | else | |
12579 | face = FACE_FROM_ID (f, it->face_id); | |
12580 | ||
5f5c8ee5 GM |
12581 | if (FRAME_WINDOW_P (f) |
12582 | && face->box == FACE_NO_BOX | |
12583 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
12584 | && !face->stipple) | |
12585 | return; | |
1842fc1a | 12586 | |
5f5c8ee5 GM |
12587 | /* Set the glyph row flag indicating that the face of the last glyph |
12588 | in the text area has to be drawn to the end of the text area. */ | |
12589 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 12590 | |
980806b6 KH |
12591 | /* If current character of IT is not ASCII, make sure we have the |
12592 | ASCII face. This will be automatically undone the next time | |
12593 | get_next_display_element returns a multibyte character. Note | |
12594 | that the character will always be single byte in unibyte text. */ | |
12595 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 12596 | { |
980806b6 | 12597 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 12598 | } |
545e04f6 | 12599 | |
5f5c8ee5 GM |
12600 | if (FRAME_WINDOW_P (f)) |
12601 | { | |
12602 | /* If the row is empty, add a space with the current face of IT, | |
12603 | so that we know which face to draw. */ | |
12604 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 12605 | { |
5f5c8ee5 | 12606 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 12607 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 12608 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 12609 | } |
5f5c8ee5 GM |
12610 | } |
12611 | else | |
12612 | { | |
12613 | /* Save some values that must not be changed. */ | |
12614 | int saved_x = it->current_x; | |
12615 | struct text_pos saved_pos; | |
12616 | Lisp_Object saved_object; | |
478d746b | 12617 | enum display_element_type saved_what = it->what; |
4aad61f8 | 12618 | int saved_face_id = it->face_id; |
5f5c8ee5 GM |
12619 | |
12620 | saved_object = it->object; | |
12621 | saved_pos = it->position; | |
12622 | ||
12623 | it->what = IT_CHARACTER; | |
12624 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 12625 | it->object = make_number (0); |
5f5c8ee5 GM |
12626 | it->c = ' '; |
12627 | it->len = 1; | |
4aad61f8 | 12628 | it->face_id = face->id; |
5f5c8ee5 GM |
12629 | |
12630 | PRODUCE_GLYPHS (it); | |
12631 | ||
12632 | while (it->current_x <= it->last_visible_x) | |
12633 | PRODUCE_GLYPHS (it); | |
12634 | ||
12635 | /* Don't count these blanks really. It would let us insert a left | |
12636 | truncation glyph below and make us set the cursor on them, maybe. */ | |
12637 | it->current_x = saved_x; | |
12638 | it->object = saved_object; | |
12639 | it->position = saved_pos; | |
12640 | it->what = saved_what; | |
4aad61f8 | 12641 | it->face_id = saved_face_id; |
5f5c8ee5 GM |
12642 | } |
12643 | } | |
12adba34 | 12644 | |
545e04f6 | 12645 | |
5f5c8ee5 GM |
12646 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
12647 | trailing whitespace. */ | |
1c9241f5 | 12648 | |
5f5c8ee5 GM |
12649 | static int |
12650 | trailing_whitespace_p (charpos) | |
12651 | int charpos; | |
12652 | { | |
12653 | int bytepos = CHAR_TO_BYTE (charpos); | |
12654 | int c = 0; | |
7bbe686f | 12655 | |
5f5c8ee5 GM |
12656 | while (bytepos < ZV_BYTE |
12657 | && (c = FETCH_CHAR (bytepos), | |
12658 | c == ' ' || c == '\t')) | |
12659 | ++bytepos; | |
0d09d1e6 | 12660 | |
8f897821 GM |
12661 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
12662 | { | |
12663 | if (bytepos != PT_BYTE) | |
12664 | return 1; | |
12665 | } | |
12666 | return 0; | |
5f5c8ee5 | 12667 | } |
31b24551 | 12668 | |
545e04f6 | 12669 | |
5f5c8ee5 | 12670 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 12671 | |
5f5c8ee5 GM |
12672 | void |
12673 | highlight_trailing_whitespace (f, row) | |
12674 | struct frame *f; | |
12675 | struct glyph_row *row; | |
12676 | { | |
12677 | int used = row->used[TEXT_AREA]; | |
12678 | ||
12679 | if (used) | |
12680 | { | |
12681 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
12682 | struct glyph *glyph = start + used - 1; | |
12683 | ||
ade0bee1 GM |
12684 | /* Skip over glyphs inserted to display the cursor at the |
12685 | end of a line, for extending the face of the last glyph | |
12686 | to the end of the line on terminals, and for truncation | |
12687 | and continuation glyphs. */ | |
65008712 GM |
12688 | while (glyph >= start |
12689 | && glyph->type == CHAR_GLYPH | |
65008712 | 12690 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
12691 | --glyph; |
12692 | ||
12693 | /* If last glyph is a space or stretch, and it's trailing | |
12694 | whitespace, set the face of all trailing whitespace glyphs in | |
12695 | IT->glyph_row to `trailing-whitespace'. */ | |
12696 | if (glyph >= start | |
12697 | && BUFFERP (glyph->object) | |
12698 | && (glyph->type == STRETCH_GLYPH | |
12699 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 12700 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 12701 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 12702 | { |
980806b6 | 12703 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
5f5c8ee5 GM |
12704 | |
12705 | while (glyph >= start | |
12706 | && BUFFERP (glyph->object) | |
12707 | && (glyph->type == STRETCH_GLYPH | |
12708 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
12709 | && glyph->u.ch == ' '))) |
12710 | (glyph--)->face_id = face_id; | |
545e04f6 | 12711 | } |
a2889657 | 12712 | } |
5f5c8ee5 | 12713 | } |
a2889657 | 12714 | |
5fcbb24d | 12715 | |
cafafe0b | 12716 | /* Value is non-zero if glyph row ROW in window W should be |
0fd37545 | 12717 | used to hold the cursor. */ |
cafafe0b GM |
12718 | |
12719 | static int | |
12720 | cursor_row_p (w, row) | |
12721 | struct window *w; | |
12722 | struct glyph_row *row; | |
12723 | { | |
9a038881 GM |
12724 | int cursor_row_p = 1; |
12725 | ||
cafafe0b GM |
12726 | if (PT == MATRIX_ROW_END_CHARPOS (row)) |
12727 | { | |
9a038881 GM |
12728 | /* If the row ends with a newline from a string, we don't want |
12729 | the cursor there (if the row is continued it doesn't end in a | |
12730 | newline). */ | |
12731 | if (CHARPOS (row->end.string_pos) >= 0 | |
12732 | || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) | |
12733 | cursor_row_p = row->continued_p; | |
12734 | ||
12735 | /* If the row ends at ZV, display the cursor at the end of that | |
12736 | row instead of at the start of the row below. */ | |
12737 | else if (row->ends_at_zv_p) | |
12738 | cursor_row_p = 1; | |
12739 | else | |
12740 | cursor_row_p = 0; | |
cafafe0b GM |
12741 | } |
12742 | ||
9a038881 | 12743 | return cursor_row_p; |
cafafe0b GM |
12744 | } |
12745 | ||
12746 | ||
5f5c8ee5 GM |
12747 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
12748 | IT->w from text at the current position of IT. See dispextern.h | |
12749 | for an overview of struct it. Value is non-zero if | |
12750 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
12751 | only. */ | |
12752 | ||
12753 | static int | |
12754 | display_line (it) | |
12755 | struct it *it; | |
12756 | { | |
12757 | struct glyph_row *row = it->glyph_row; | |
12758 | ||
12759 | /* We always start displaying at hpos zero even if hscrolled. */ | |
12760 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 12761 | |
5f5c8ee5 GM |
12762 | /* We must not display in a row that's not a text row. */ |
12763 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
12764 | < it->w->desired_matrix->nrows); | |
12adba34 | 12765 | |
5f5c8ee5 GM |
12766 | /* Is IT->w showing the region? */ |
12767 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 12768 | |
5f5c8ee5 GM |
12769 | /* Clear the result glyph row and enable it. */ |
12770 | prepare_desired_row (row); | |
12adba34 | 12771 | |
5f5c8ee5 GM |
12772 | row->y = it->current_y; |
12773 | row->start = it->current; | |
12774 | row->continuation_lines_width = it->continuation_lines_width; | |
12775 | row->displays_text_p = 1; | |
91004049 GM |
12776 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
12777 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
12778 | |
12779 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
12780 | display_line on only one line at a time, in which case this | |
12781 | can't really hurt too much, or we call it on lines which appear | |
12782 | one after another in the buffer, in which case all calls to | |
12783 | recenter_overlay_lists but the first will be pretty cheap. */ | |
12784 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
12785 | ||
5f5c8ee5 GM |
12786 | /* Move over display elements that are not visible because we are |
12787 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
12788 | if the first glyph is partially visible or if we hit a line end. */ | |
12789 | if (it->current_x < it->first_visible_x) | |
12790 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
12791 | MOVE_TO_POS | MOVE_TO_X); | |
12792 | ||
12793 | /* Get the initial row height. This is either the height of the | |
12794 | text hscrolled, if there is any, or zero. */ | |
12795 | row->ascent = it->max_ascent; | |
12796 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12797 | row->phys_ascent = it->max_phys_ascent; |
12798 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
12799 | |
12800 | /* Loop generating characters. The loop is left with IT on the next | |
12801 | character to display. */ | |
12802 | while (1) | |
12803 | { | |
12804 | int n_glyphs_before, hpos_before, x_before; | |
12805 | int x, i, nglyphs; | |
ae26e27d | 12806 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 12807 | |
5f5c8ee5 GM |
12808 | /* Retrieve the next thing to display. Value is zero if end of |
12809 | buffer reached. */ | |
12810 | if (!get_next_display_element (it)) | |
12811 | { | |
12812 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
12813 | display the cursor there under X. Set the charpos of the |
12814 | first glyph of blank lines not corresponding to any text | |
12815 | to -1. */ | |
12816 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
12817 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 12818 | { |
5f5c8ee5 GM |
12819 | row->glyphs[TEXT_AREA]->charpos = -1; |
12820 | row->displays_text_p = 0; | |
12821 | ||
2ad551af | 12822 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines) |
e6b70fd8 GM |
12823 | && (!MINI_WINDOW_P (it->w) |
12824 | || (minibuf_level && EQ (it->window, minibuf_window)))) | |
5f5c8ee5 | 12825 | row->indicate_empty_line_p = 1; |
a2889657 | 12826 | } |
5f5c8ee5 GM |
12827 | |
12828 | it->continuation_lines_width = 0; | |
12829 | row->ends_at_zv_p = 1; | |
12830 | break; | |
a2889657 | 12831 | } |
a2889657 | 12832 | |
5f5c8ee5 GM |
12833 | /* Now, get the metrics of what we want to display. This also |
12834 | generates glyphs in `row' (which is IT->glyph_row). */ | |
12835 | n_glyphs_before = row->used[TEXT_AREA]; | |
12836 | x = it->current_x; | |
e6819faf GM |
12837 | |
12838 | /* Remember the line height so far in case the next element doesn't | |
12839 | fit on the line. */ | |
12840 | if (!it->truncate_lines_p) | |
12841 | { | |
12842 | ascent = it->max_ascent; | |
12843 | descent = it->max_descent; | |
12844 | phys_ascent = it->max_phys_ascent; | |
12845 | phys_descent = it->max_phys_descent; | |
12846 | } | |
12847 | ||
5f5c8ee5 | 12848 | PRODUCE_GLYPHS (it); |
a2889657 | 12849 | |
5f5c8ee5 GM |
12850 | /* If this display element was in marginal areas, continue with |
12851 | the next one. */ | |
12852 | if (it->area != TEXT_AREA) | |
a2889657 | 12853 | { |
5f5c8ee5 GM |
12854 | row->ascent = max (row->ascent, it->max_ascent); |
12855 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12856 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12857 | row->phys_height = max (row->phys_height, | |
12858 | it->max_phys_ascent + it->max_phys_descent); | |
cafafe0b | 12859 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
12860 | continue; |
12861 | } | |
5936754e | 12862 | |
5f5c8ee5 GM |
12863 | /* Does the display element fit on the line? If we truncate |
12864 | lines, we should draw past the right edge of the window. If | |
12865 | we don't truncate, we want to stop so that we can display the | |
12866 | continuation glyph before the right margin. If lines are | |
12867 | continued, there are two possible strategies for characters | |
12868 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
12869 | glyphs as possible in this line and leave the rest for the | |
12870 | continuation line, or display the whole element in the next | |
12871 | line. Original redisplay did the former, so we do it also. */ | |
12872 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
12873 | hpos_before = it->hpos; | |
12874 | x_before = x; | |
4dcd74e6 GM |
12875 | |
12876 | if (/* Not a newline. */ | |
12877 | nglyphs > 0 | |
202c1b5b | 12878 | /* Glyphs produced fit entirely in the line. */ |
4dcd74e6 GM |
12879 | && it->current_x < it->last_visible_x) |
12880 | { | |
37be86f2 | 12881 | it->hpos += nglyphs; |
5f5c8ee5 GM |
12882 | row->ascent = max (row->ascent, it->max_ascent); |
12883 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12884 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12885 | row->phys_height = max (row->phys_height, | |
12886 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
12887 | if (it->current_x - it->pixel_width < it->first_visible_x) |
12888 | row->x = x - it->first_visible_x; | |
12889 | } | |
12890 | else | |
12891 | { | |
12892 | int new_x; | |
12893 | struct glyph *glyph; | |
12894 | ||
12895 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 12896 | { |
5f5c8ee5 GM |
12897 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
12898 | new_x = x + glyph->pixel_width; | |
12899 | ||
12900 | if (/* Lines are continued. */ | |
12901 | !it->truncate_lines_p | |
12902 | && (/* Glyph doesn't fit on the line. */ | |
12903 | new_x > it->last_visible_x | |
12904 | /* Or it fits exactly on a window system frame. */ | |
12905 | || (new_x == it->last_visible_x | |
12906 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 12907 | { |
5f5c8ee5 GM |
12908 | /* End of a continued line. */ |
12909 | ||
12910 | if (it->hpos == 0 | |
12911 | || (new_x == it->last_visible_x | |
12912 | && FRAME_WINDOW_P (it->f))) | |
12913 | { | |
e6819faf GM |
12914 | /* Current glyph is the only one on the line or |
12915 | fits exactly on the line. We must continue | |
12916 | the line because we can't draw the cursor | |
12917 | after the glyph. */ | |
5f5c8ee5 GM |
12918 | row->continued_p = 1; |
12919 | it->current_x = new_x; | |
12920 | it->continuation_lines_width += new_x; | |
12921 | ++it->hpos; | |
12922 | if (i == nglyphs - 1) | |
cafafe0b | 12923 | set_iterator_to_next (it, 1); |
5f5c8ee5 | 12924 | } |
3b3c4bf0 GM |
12925 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
12926 | && !FRAME_WINDOW_P (it->f)) | |
12927 | { | |
12928 | /* A padding glyph that doesn't fit on this line. | |
12929 | This means the whole character doesn't fit | |
12930 | on the line. */ | |
12931 | row->used[TEXT_AREA] = n_glyphs_before; | |
12932 | ||
12933 | /* Fill the rest of the row with continuation | |
12934 | glyphs like in 20.x. */ | |
12935 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
12936 | < row->glyphs[1 + TEXT_AREA]) | |
12937 | produce_special_glyphs (it, IT_CONTINUATION); | |
12938 | ||
12939 | row->continued_p = 1; | |
12940 | it->current_x = x_before; | |
12941 | it->continuation_lines_width += x_before; | |
12942 | ||
12943 | /* Restore the height to what it was before the | |
12944 | element not fitting on the line. */ | |
12945 | it->max_ascent = ascent; | |
12946 | it->max_descent = descent; | |
12947 | it->max_phys_ascent = phys_ascent; | |
12948 | it->max_phys_descent = phys_descent; | |
12949 | } | |
0df56f4d GM |
12950 | else if (it->c == '\t' && FRAME_WINDOW_P (it->f)) |
12951 | { | |
12952 | /* A TAB that extends past the right edge of the | |
12953 | window. This produces a single glyph on | |
12954 | window system frames. We leave the glyph in | |
12955 | this row and let it fill the row, but don't | |
12956 | consume the TAB. */ | |
12957 | it->continuation_lines_width += it->last_visible_x; | |
12958 | row->ends_in_middle_of_char_p = 1; | |
12959 | row->continued_p = 1; | |
12960 | glyph->pixel_width = it->last_visible_x - x; | |
12961 | it->starts_in_middle_of_char_p = 1; | |
12962 | } | |
5f5c8ee5 | 12963 | else |
5936754e | 12964 | { |
0df56f4d GM |
12965 | /* Something other than a TAB that draws past |
12966 | the right edge of the window. Restore | |
12967 | positions to values before the element. */ | |
5f5c8ee5 GM |
12968 | row->used[TEXT_AREA] = n_glyphs_before + i; |
12969 | ||
12970 | /* Display continuation glyphs. */ | |
12971 | if (!FRAME_WINDOW_P (it->f)) | |
12972 | produce_special_glyphs (it, IT_CONTINUATION); | |
12973 | row->continued_p = 1; | |
653c329b | 12974 | |
0df56f4d | 12975 | it->continuation_lines_width += x; |
5f5c8ee5 | 12976 | |
91004049 GM |
12977 | if (nglyphs > 1 && i > 0) |
12978 | { | |
12979 | row->ends_in_middle_of_char_p = 1; | |
12980 | it->starts_in_middle_of_char_p = 1; | |
12981 | } | |
e6819faf GM |
12982 | |
12983 | /* Restore the height to what it was before the | |
12984 | element not fitting on the line. */ | |
12985 | it->max_ascent = ascent; | |
12986 | it->max_descent = descent; | |
12987 | it->max_phys_ascent = phys_ascent; | |
12988 | it->max_phys_descent = phys_descent; | |
5936754e | 12989 | } |
e6819faf | 12990 | |
5f5c8ee5 GM |
12991 | break; |
12992 | } | |
12993 | else if (new_x > it->first_visible_x) | |
12994 | { | |
12995 | /* Increment number of glyphs actually displayed. */ | |
12996 | ++it->hpos; | |
12997 | ||
12998 | if (x < it->first_visible_x) | |
12999 | /* Glyph is partially visible, i.e. row starts at | |
13000 | negative X position. */ | |
13001 | row->x = x - it->first_visible_x; | |
13002 | } | |
13003 | else | |
13004 | { | |
13005 | /* Glyph is completely off the left margin of the | |
13006 | window. This should not happen because of the | |
13007 | move_it_in_display_line at the start of | |
13008 | this function. */ | |
13009 | abort (); | |
a2889657 | 13010 | } |
a2889657 | 13011 | } |
5f5c8ee5 GM |
13012 | |
13013 | row->ascent = max (row->ascent, it->max_ascent); | |
13014 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13015 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13016 | row->phys_height = max (row->phys_height, | |
13017 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13018 | |
13019 | /* End of this display line if row is continued. */ | |
13020 | if (row->continued_p) | |
13021 | break; | |
a2889657 | 13022 | } |
a2889657 | 13023 | |
5f5c8ee5 GM |
13024 | /* Is this a line end? If yes, we're also done, after making |
13025 | sure that a non-default face is extended up to the right | |
13026 | margin of the window. */ | |
13027 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 13028 | { |
5f5c8ee5 GM |
13029 | int used_before = row->used[TEXT_AREA]; |
13030 | ||
e74fb0f7 GM |
13031 | row->ends_in_newline_from_string_p = STRINGP (it->object); |
13032 | ||
5f5c8ee5 GM |
13033 | /* Add a space at the end of the line that is used to |
13034 | display the cursor there. */ | |
13035 | append_space (it, 0); | |
13036 | ||
13037 | /* Extend the face to the end of the line. */ | |
13038 | extend_face_to_end_of_line (it); | |
13039 | ||
13040 | /* Make sure we have the position. */ | |
13041 | if (used_before == 0) | |
13042 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
13043 | ||
13044 | /* Consume the line end. This skips over invisible lines. */ | |
cafafe0b | 13045 | set_iterator_to_next (it, 1); |
5f5c8ee5 GM |
13046 | it->continuation_lines_width = 0; |
13047 | break; | |
1c9241f5 | 13048 | } |
a2889657 | 13049 | |
5f5c8ee5 GM |
13050 | /* Proceed with next display element. Note that this skips |
13051 | over lines invisible because of selective display. */ | |
cafafe0b | 13052 | set_iterator_to_next (it, 1); |
b1d1124b | 13053 | |
5f5c8ee5 GM |
13054 | /* If we truncate lines, we are done when the last displayed |
13055 | glyphs reach past the right margin of the window. */ | |
13056 | if (it->truncate_lines_p | |
13057 | && (FRAME_WINDOW_P (it->f) | |
13058 | ? (it->current_x >= it->last_visible_x) | |
13059 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 13060 | { |
5f5c8ee5 GM |
13061 | /* Maybe add truncation glyphs. */ |
13062 | if (!FRAME_WINDOW_P (it->f)) | |
13063 | { | |
a98b5ed9 GM |
13064 | int i, n; |
13065 | ||
13066 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) | |
13067 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
13068 | break; | |
13069 | ||
13070 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
13071 | { | |
13072 | row->used[TEXT_AREA] = i; | |
13073 | produce_special_glyphs (it, IT_TRUNCATION); | |
13074 | } | |
5f5c8ee5 GM |
13075 | } |
13076 | ||
13077 | row->truncated_on_right_p = 1; | |
13078 | it->continuation_lines_width = 0; | |
312246d1 | 13079 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
13080 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
13081 | it->hpos = hpos_before; | |
13082 | it->current_x = x_before; | |
13083 | break; | |
75d13c64 | 13084 | } |
a2889657 | 13085 | } |
a2889657 | 13086 | |
5f5c8ee5 GM |
13087 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
13088 | at the left window margin. */ | |
13089 | if (it->first_visible_x | |
13090 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
13091 | { | |
13092 | if (!FRAME_WINDOW_P (it->f)) | |
13093 | insert_left_trunc_glyphs (it); | |
13094 | row->truncated_on_left_p = 1; | |
13095 | } | |
a2889657 | 13096 | |
5f5c8ee5 GM |
13097 | /* If the start of this line is the overlay arrow-position, then |
13098 | mark this glyph row as the one containing the overlay arrow. | |
13099 | This is clearly a mess with variable size fonts. It would be | |
13100 | better to let it be displayed like cursors under X. */ | |
e24c997d | 13101 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 13102 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
13103 | && (MATRIX_ROW_START_CHARPOS (row) |
13104 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 13105 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
13106 | && ! overlay_arrow_seen) |
13107 | { | |
b46952ae | 13108 | /* Overlay arrow in window redisplay is a fringe bitmap. */ |
5f5c8ee5 | 13109 | if (!FRAME_WINDOW_P (it->f)) |
c4628384 | 13110 | { |
5f5c8ee5 GM |
13111 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
13112 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
13113 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
13114 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
13115 | struct glyph *p2, *end; | |
13116 | ||
13117 | /* Copy the arrow glyphs. */ | |
13118 | while (glyph < arrow_end) | |
13119 | *p++ = *glyph++; | |
13120 | ||
13121 | /* Throw away padding glyphs. */ | |
13122 | p2 = p; | |
13123 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
13124 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
13125 | ++p2; | |
13126 | if (p2 > p) | |
212e4f87 | 13127 | { |
5f5c8ee5 GM |
13128 | while (p2 < end) |
13129 | *p++ = *p2++; | |
13130 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 13131 | } |
c4628384 | 13132 | } |
5f5c8ee5 | 13133 | |
a2889657 | 13134 | overlay_arrow_seen = 1; |
5f5c8ee5 | 13135 | row->overlay_arrow_p = 1; |
a2889657 JB |
13136 | } |
13137 | ||
5f5c8ee5 GM |
13138 | /* Compute pixel dimensions of this line. */ |
13139 | compute_line_metrics (it); | |
13140 | ||
13141 | /* Remember the position at which this line ends. */ | |
13142 | row->end = it->current; | |
13143 | ||
173cbca8 | 13144 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
13145 | if (it->w->cursor.vpos < 0 |
13146 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
cafafe0b GM |
13147 | && PT <= MATRIX_ROW_END_CHARPOS (row) |
13148 | && cursor_row_p (it->w, row)) | |
13149 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
13150 | |
13151 | /* Highlight trailing whitespace. */ | |
8f897821 | 13152 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
13153 | highlight_trailing_whitespace (it->f, it->glyph_row); |
13154 | ||
13155 | /* Prepare for the next line. This line starts horizontally at (X | |
13156 | HPOS) = (0 0). Vertical positions are incremented. As a | |
13157 | convenience for the caller, IT->glyph_row is set to the next | |
13158 | row to be used. */ | |
13159 | it->current_x = it->hpos = 0; | |
13160 | it->current_y += row->height; | |
13161 | ++it->vpos; | |
13162 | ++it->glyph_row; | |
13163 | return row->displays_text_p; | |
a2889657 | 13164 | } |
5f5c8ee5 GM |
13165 | |
13166 | ||
a2889657 | 13167 | \f |
5f5c8ee5 GM |
13168 | /*********************************************************************** |
13169 | Menu Bar | |
13170 | ***********************************************************************/ | |
13171 | ||
13172 | /* Redisplay the menu bar in the frame for window W. | |
13173 | ||
13174 | The menu bar of X frames that don't have X toolkit support is | |
13175 | displayed in a special window W->frame->menu_bar_window. | |
13176 | ||
13177 | The menu bar of terminal frames is treated specially as far as | |
13178 | glyph matrices are concerned. Menu bar lines are not part of | |
13179 | windows, so the update is done directly on the frame matrix rows | |
13180 | for the menu bar. */ | |
7ce2c095 RS |
13181 | |
13182 | static void | |
13183 | display_menu_bar (w) | |
13184 | struct window *w; | |
13185 | { | |
5f5c8ee5 GM |
13186 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
13187 | struct it it; | |
13188 | Lisp_Object items; | |
8351baf2 | 13189 | int i; |
7ce2c095 | 13190 | |
5f5c8ee5 | 13191 | /* Don't do all this for graphical frames. */ |
dc937613 | 13192 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
13193 | if (!NILP (Vwindow_system)) |
13194 | return; | |
dc937613 | 13195 | #endif |
dc937613 | 13196 | #ifdef USE_X_TOOLKIT |
d3413a53 | 13197 | if (FRAME_X_P (f)) |
7ce2c095 | 13198 | return; |
5f5c8ee5 | 13199 | #endif |
1a578e9b AC |
13200 | #ifdef macintosh |
13201 | if (FRAME_MAC_P (f)) | |
13202 | return; | |
13203 | #endif | |
5f5c8ee5 GM |
13204 | |
13205 | #ifdef USE_X_TOOLKIT | |
13206 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 13207 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
13208 | it.first_visible_x = 0; |
13209 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13210 | #else /* not USE_X_TOOLKIT */ | |
13211 | if (FRAME_WINDOW_P (f)) | |
13212 | { | |
13213 | /* Menu bar lines are displayed in the desired matrix of the | |
13214 | dummy window menu_bar_window. */ | |
13215 | struct window *menu_w; | |
13216 | xassert (WINDOWP (f->menu_bar_window)); | |
13217 | menu_w = XWINDOW (f->menu_bar_window); | |
13218 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 13219 | MENU_FACE_ID); |
5f5c8ee5 GM |
13220 | it.first_visible_x = 0; |
13221 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
13222 | } | |
13223 | else | |
13224 | { | |
13225 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
13226 | pixel x/y. */ | |
13227 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 13228 | MENU_FACE_ID); |
5f5c8ee5 GM |
13229 | it.first_visible_x = 0; |
13230 | it.last_visible_x = FRAME_WIDTH (f); | |
13231 | } | |
13232 | #endif /* not USE_X_TOOLKIT */ | |
13233 | ||
1862a24e MB |
13234 | if (! mode_line_inverse_video) |
13235 | /* Force the menu-bar to be displayed in the default face. */ | |
13236 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13237 | ||
5f5c8ee5 GM |
13238 | /* Clear all rows of the menu bar. */ |
13239 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
13240 | { | |
13241 | struct glyph_row *row = it.glyph_row + i; | |
13242 | clear_glyph_row (row); | |
13243 | row->enabled_p = 1; | |
13244 | row->full_width_p = 1; | |
13245 | } | |
7ce2c095 | 13246 | |
5f5c8ee5 GM |
13247 | /* Display all items of the menu bar. */ |
13248 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 13249 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 13250 | { |
5f5c8ee5 GM |
13251 | Lisp_Object string; |
13252 | ||
13253 | /* Stop at nil string. */ | |
a61b7058 | 13254 | string = AREF (items, i + 1); |
8351baf2 RS |
13255 | if (NILP (string)) |
13256 | break; | |
2d66ad19 | 13257 | |
5f5c8ee5 | 13258 | /* Remember where item was displayed. */ |
a61b7058 | 13259 | AREF (items, i + 3) = make_number (it.hpos); |
7ce2c095 | 13260 | |
5f5c8ee5 GM |
13261 | /* Display the item, pad with one space. */ |
13262 | if (it.current_x < it.last_visible_x) | |
13263 | display_string (NULL, string, Qnil, 0, 0, &it, | |
13264 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
13265 | } |
13266 | ||
2d66ad19 | 13267 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
13268 | if (it.current_x < it.last_visible_x) |
13269 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 13270 | |
5f5c8ee5 GM |
13271 | /* Compute the total height of the lines. */ |
13272 | compute_line_metrics (&it); | |
7ce2c095 | 13273 | } |
5f5c8ee5 GM |
13274 | |
13275 | ||
7ce2c095 | 13276 | \f |
5f5c8ee5 GM |
13277 | /*********************************************************************** |
13278 | Mode Line | |
13279 | ***********************************************************************/ | |
13280 | ||
715e84c9 GM |
13281 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
13282 | FORCE is non-zero, redisplay mode lines unconditionally. | |
13283 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
13284 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 13285 | |
715e84c9 GM |
13286 | static int |
13287 | redisplay_mode_lines (window, force) | |
13288 | Lisp_Object window; | |
13289 | int force; | |
13290 | { | |
13291 | int nwindows = 0; | |
13292 | ||
13293 | while (!NILP (window)) | |
13294 | { | |
13295 | struct window *w = XWINDOW (window); | |
13296 | ||
13297 | if (WINDOWP (w->hchild)) | |
13298 | nwindows += redisplay_mode_lines (w->hchild, force); | |
13299 | else if (WINDOWP (w->vchild)) | |
13300 | nwindows += redisplay_mode_lines (w->vchild, force); | |
13301 | else if (force | |
13302 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
13303 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
13304 | { | |
715e84c9 GM |
13305 | struct text_pos lpoint; |
13306 | struct buffer *old = current_buffer; | |
13307 | ||
13308 | /* Set the window's buffer for the mode line display. */ | |
13309 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
13310 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
13311 | ||
13312 | /* Point refers normally to the selected window. For any | |
13313 | other window, set up appropriate value. */ | |
13314 | if (!EQ (window, selected_window)) | |
13315 | { | |
13316 | struct text_pos pt; | |
13317 | ||
13318 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); | |
13319 | if (CHARPOS (pt) < BEGV) | |
13320 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
13321 | else if (CHARPOS (pt) > (ZV - 1)) | |
13322 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
13323 | else | |
13324 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
13325 | } | |
13326 | ||
715e84c9 GM |
13327 | /* Display mode lines. */ |
13328 | clear_glyph_matrix (w->desired_matrix); | |
13329 | if (display_mode_lines (w)) | |
13330 | { | |
13331 | ++nwindows; | |
13332 | w->must_be_updated_p = 1; | |
13333 | } | |
13334 | ||
13335 | /* Restore old settings. */ | |
715e84c9 GM |
13336 | set_buffer_internal_1 (old); |
13337 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
13338 | } | |
13339 | ||
13340 | window = w->next; | |
13341 | } | |
13342 | ||
13343 | return nwindows; | |
13344 | } | |
13345 | ||
13346 | ||
13347 | /* Display the mode and/or top line of window W. Value is the number | |
13348 | of mode lines displayed. */ | |
13349 | ||
13350 | static int | |
5f5c8ee5 | 13351 | display_mode_lines (w) |
a2889657 JB |
13352 | struct window *w; |
13353 | { | |
edd1e654 | 13354 | Lisp_Object old_selected_window, old_selected_frame; |
715e84c9 | 13355 | int n = 0; |
edd1e654 GM |
13356 | |
13357 | old_selected_frame = selected_frame; | |
13358 | selected_frame = w->frame; | |
13359 | old_selected_window = selected_window; | |
13360 | XSETWINDOW (selected_window, w); | |
715e84c9 | 13361 | |
5f5c8ee5 | 13362 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 13363 | line_number_displayed = 0; |
155ef550 | 13364 | w->column_number_displayed = Qnil; |
aa6d10fa | 13365 | |
5f5c8ee5 | 13366 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 GM |
13367 | { |
13368 | display_mode_line (w, MODE_LINE_FACE_ID, | |
13369 | current_buffer->mode_line_format); | |
13370 | ++n; | |
13371 | } | |
5f5c8ee5 | 13372 | |
045dee35 | 13373 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
13374 | { |
13375 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
13376 | current_buffer->header_line_format); | |
13377 | ++n; | |
13378 | } | |
13379 | ||
edd1e654 GM |
13380 | selected_frame = old_selected_frame; |
13381 | selected_window = old_selected_window; | |
715e84c9 | 13382 | return n; |
5f5c8ee5 | 13383 | } |
03b294dc | 13384 | |
03b294dc | 13385 | |
5f5c8ee5 | 13386 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 13387 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
04612a64 GM |
13388 | FORMAT is the mode line format to display. Value is the pixel |
13389 | height of the mode line displayed. */ | |
03b294dc | 13390 | |
04612a64 | 13391 | static int |
5f5c8ee5 GM |
13392 | display_mode_line (w, face_id, format) |
13393 | struct window *w; | |
13394 | enum face_id face_id; | |
13395 | Lisp_Object format; | |
13396 | { | |
13397 | struct it it; | |
13398 | struct face *face; | |
03b294dc | 13399 | |
5f5c8ee5 GM |
13400 | init_iterator (&it, w, -1, -1, NULL, face_id); |
13401 | prepare_desired_row (it.glyph_row); | |
13402 | ||
1862a24e MB |
13403 | if (! mode_line_inverse_video) |
13404 | /* Force the mode-line to be displayed in the default face. */ | |
13405 | it.base_face_id = it.face_id = DEFAULT_FACE_ID; | |
13406 | ||
5f5c8ee5 GM |
13407 | /* Temporarily make frame's keyboard the current kboard so that |
13408 | kboard-local variables in the mode_line_format will get the right | |
13409 | values. */ | |
13410 | push_frame_kboard (it.f); | |
13411 | display_mode_element (&it, 0, 0, 0, format); | |
13412 | pop_frame_kboard (); | |
a2889657 | 13413 | |
5f5c8ee5 GM |
13414 | /* Fill up with spaces. */ |
13415 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
13416 | ||
13417 | compute_line_metrics (&it); | |
13418 | it.glyph_row->full_width_p = 1; | |
13419 | it.glyph_row->mode_line_p = 1; | |
5f5c8ee5 GM |
13420 | it.glyph_row->continued_p = 0; |
13421 | it.glyph_row->truncated_on_left_p = 0; | |
13422 | it.glyph_row->truncated_on_right_p = 0; | |
13423 | ||
13424 | /* Make a 3D mode-line have a shadow at its right end. */ | |
13425 | face = FACE_FROM_ID (it.f, face_id); | |
13426 | extend_face_to_end_of_line (&it); | |
13427 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 13428 | { |
5f5c8ee5 GM |
13429 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
13430 | + it.glyph_row->used[TEXT_AREA] - 1); | |
13431 | last->right_box_line_p = 1; | |
d7eb09a0 | 13432 | } |
04612a64 GM |
13433 | |
13434 | return it.glyph_row->height; | |
a2889657 JB |
13435 | } |
13436 | ||
a2889657 | 13437 | |
5f5c8ee5 GM |
13438 | /* Contribute ELT to the mode line for window IT->w. How it |
13439 | translates into text depends on its data type. | |
a2889657 | 13440 | |
5f5c8ee5 | 13441 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
13442 | |
13443 | DEPTH is the depth in recursion. It is used to prevent | |
13444 | infinite recursion here. | |
13445 | ||
5f5c8ee5 GM |
13446 | FIELD_WIDTH is the number of characters the display of ELT should |
13447 | occupy in the mode line, and PRECISION is the maximum number of | |
13448 | characters to display from ELT's representation. See | |
13449 | display_string for details. * | |
a2889657 | 13450 | |
5f5c8ee5 | 13451 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
13452 | |
13453 | static int | |
5f5c8ee5 GM |
13454 | display_mode_element (it, depth, field_width, precision, elt) |
13455 | struct it *it; | |
a2889657 | 13456 | int depth; |
5f5c8ee5 GM |
13457 | int field_width, precision; |
13458 | Lisp_Object elt; | |
a2889657 | 13459 | { |
5f5c8ee5 GM |
13460 | int n = 0, field, prec; |
13461 | ||
a2889657 JB |
13462 | tail_recurse: |
13463 | if (depth > 10) | |
13464 | goto invalid; | |
13465 | ||
13466 | depth++; | |
13467 | ||
0220c518 | 13468 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
13469 | { |
13470 | case Lisp_String: | |
13471 | { | |
13472 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
13473 | unsigned char c; |
13474 | unsigned char *this = XSTRING (elt)->data; | |
13475 | unsigned char *lisp_string = this; | |
13476 | ||
13477 | while ((precision <= 0 || n < precision) | |
13478 | && *this | |
13479 | && (frame_title_ptr | |
13480 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
13481 | { |
13482 | unsigned char *last = this; | |
5f5c8ee5 GM |
13483 | |
13484 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
13485 | while ((c = *this++) != '\0' && c != '%') |
13486 | ; | |
5f5c8ee5 | 13487 | |
a2889657 JB |
13488 | if (this - 1 != last) |
13489 | { | |
5f5c8ee5 GM |
13490 | /* Output to end of string or up to '%'. Field width |
13491 | is length of string. Don't output more than | |
13492 | PRECISION allows us. */ | |
d26b89b8 | 13493 | --this; |
eaaa65b0 GM |
13494 | |
13495 | prec = chars_in_text (last, this - last); | |
5f5c8ee5 GM |
13496 | if (precision > 0 && prec > precision - n) |
13497 | prec = precision - n; | |
13498 | ||
d39b6696 | 13499 | if (frame_title_ptr) |
d26b89b8 | 13500 | n += store_frame_title (last, 0, prec); |
d39b6696 | 13501 | else |
eaaa65b0 GM |
13502 | { |
13503 | int bytepos = last - lisp_string; | |
13504 | int charpos = string_byte_to_char (elt, bytepos); | |
13505 | n += display_string (NULL, elt, Qnil, 0, charpos, | |
ca77144d GM |
13506 | it, 0, prec, 0, |
13507 | STRING_MULTIBYTE (elt)); | |
eaaa65b0 | 13508 | } |
a2889657 JB |
13509 | } |
13510 | else /* c == '%' */ | |
13511 | { | |
5f5c8ee5 GM |
13512 | unsigned char *percent_position = this; |
13513 | ||
13514 | /* Get the specified minimum width. Zero means | |
13515 | don't pad. */ | |
13516 | field = 0; | |
a2889657 | 13517 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 13518 | field = field * 10 + c - '0'; |
a2889657 | 13519 | |
5f5c8ee5 GM |
13520 | /* Don't pad beyond the total padding allowed. */ |
13521 | if (field_width - n > 0 && field > field_width - n) | |
13522 | field = field_width - n; | |
a2889657 | 13523 | |
5f5c8ee5 GM |
13524 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
13525 | prec = precision - n; | |
13526 | ||
a2889657 | 13527 | if (c == 'M') |
5f5c8ee5 GM |
13528 | n += display_mode_element (it, depth, field, prec, |
13529 | Vglobal_mode_string); | |
a2889657 | 13530 | else if (c != 0) |
d39b6696 | 13531 | { |
72f62cb5 | 13532 | int multibyte; |
5f5c8ee5 | 13533 | unsigned char *spec |
72f62cb5 GM |
13534 | = decode_mode_spec (it->w, c, field, prec, &multibyte); |
13535 | ||
d39b6696 | 13536 | if (frame_title_ptr) |
5f5c8ee5 | 13537 | n += store_frame_title (spec, field, prec); |
d39b6696 | 13538 | else |
5f5c8ee5 | 13539 | { |
72f62cb5 GM |
13540 | int nglyphs_before, bytepos, charpos, nwritten; |
13541 | ||
13542 | nglyphs_before = it->glyph_row->used[TEXT_AREA]; | |
13543 | bytepos = percent_position - XSTRING (elt)->data; | |
13544 | charpos = (multibyte | |
13545 | ? string_byte_to_char (elt, bytepos) | |
13546 | : bytepos); | |
13547 | nwritten = display_string (spec, Qnil, elt, | |
13548 | charpos, 0, it, | |
13549 | field, prec, 0, | |
13550 | multibyte); | |
5f5c8ee5 GM |
13551 | |
13552 | /* Assign to the glyphs written above the | |
13553 | string where the `%x' came from, position | |
13554 | of the `%'. */ | |
13555 | if (nwritten > 0) | |
13556 | { | |
13557 | struct glyph *glyph | |
13558 | = (it->glyph_row->glyphs[TEXT_AREA] | |
13559 | + nglyphs_before); | |
13560 | int i; | |
13561 | ||
13562 | for (i = 0; i < nwritten; ++i) | |
13563 | { | |
13564 | glyph[i].object = elt; | |
13565 | glyph[i].charpos = charpos; | |
13566 | } | |
13567 | ||
13568 | n += nwritten; | |
13569 | } | |
13570 | } | |
d39b6696 | 13571 | } |
a2889657 JB |
13572 | } |
13573 | } | |
13574 | } | |
13575 | break; | |
13576 | ||
13577 | case Lisp_Symbol: | |
13578 | /* A symbol: process the value of the symbol recursively | |
13579 | as if it appeared here directly. Avoid error if symbol void. | |
13580 | Special case: if value of symbol is a string, output the string | |
13581 | literally. */ | |
13582 | { | |
13583 | register Lisp_Object tem; | |
13584 | tem = Fboundp (elt); | |
265a9e55 | 13585 | if (!NILP (tem)) |
a2889657 JB |
13586 | { |
13587 | tem = Fsymbol_value (elt); | |
13588 | /* If value is a string, output that string literally: | |
13589 | don't check for % within it. */ | |
e24c997d | 13590 | if (STRINGP (tem)) |
d39b6696 | 13591 | { |
d26b89b8 | 13592 | prec = precision - n; |
d39b6696 | 13593 | if (frame_title_ptr) |
5f5c8ee5 | 13594 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 13595 | else |
5f5c8ee5 | 13596 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
b7a22712 | 13597 | 0, prec, 0, STRING_MULTIBYTE (tem)); |
d39b6696 | 13598 | } |
a2889657 | 13599 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
13600 | { |
13601 | /* Give up right away for nil or t. */ | |
13602 | elt = tem; | |
13603 | goto tail_recurse; | |
13604 | } | |
a2889657 JB |
13605 | } |
13606 | } | |
13607 | break; | |
13608 | ||
13609 | case Lisp_Cons: | |
13610 | { | |
13611 | register Lisp_Object car, tem; | |
13612 | ||
13613 | /* A cons cell: three distinct cases. | |
13614 | If first element is a string or a cons, process all the elements | |
13615 | and effectively concatenate them. | |
13616 | If first element is a negative number, truncate displaying cdr to | |
13617 | at most that many characters. If positive, pad (with spaces) | |
13618 | to at least that many characters. | |
13619 | If first element is a symbol, process the cadr or caddr recursively | |
13620 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 13621 | car = XCAR (elt); |
5f5c8ee5 GM |
13622 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
13623 | { | |
13624 | /* An element of the form (:eval FORM) means evaluate FORM | |
13625 | and use the result as mode line elements. */ | |
13626 | struct gcpro gcpro1; | |
13627 | Lisp_Object spec; | |
13628 | ||
116d6f5c | 13629 | spec = safe_eval (XCAR (XCDR (elt))); |
5f5c8ee5 GM |
13630 | GCPRO1 (spec); |
13631 | n += display_mode_element (it, depth, field_width - n, | |
13632 | precision - n, spec); | |
13633 | UNGCPRO; | |
13634 | } | |
13635 | else if (SYMBOLP (car)) | |
a2889657 JB |
13636 | { |
13637 | tem = Fboundp (car); | |
9472f927 | 13638 | elt = XCDR (elt); |
e24c997d | 13639 | if (!CONSP (elt)) |
a2889657 JB |
13640 | goto invalid; |
13641 | /* elt is now the cdr, and we know it is a cons cell. | |
13642 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 13643 | if (!NILP (tem)) |
a2889657 JB |
13644 | { |
13645 | tem = Fsymbol_value (car); | |
265a9e55 | 13646 | if (!NILP (tem)) |
9472f927 GM |
13647 | { |
13648 | elt = XCAR (elt); | |
13649 | goto tail_recurse; | |
13650 | } | |
a2889657 JB |
13651 | } |
13652 | /* Symbol's value is nil (or symbol is unbound) | |
13653 | Get the cddr of the original list | |
13654 | and if possible find the caddr and use that. */ | |
9472f927 | 13655 | elt = XCDR (elt); |
265a9e55 | 13656 | if (NILP (elt)) |
a2889657 | 13657 | break; |
e24c997d | 13658 | else if (!CONSP (elt)) |
a2889657 | 13659 | goto invalid; |
9472f927 | 13660 | elt = XCAR (elt); |
a2889657 JB |
13661 | goto tail_recurse; |
13662 | } | |
e24c997d | 13663 | else if (INTEGERP (car)) |
a2889657 JB |
13664 | { |
13665 | register int lim = XINT (car); | |
9472f927 | 13666 | elt = XCDR (elt); |
a2889657 | 13667 | if (lim < 0) |
5f5c8ee5 GM |
13668 | { |
13669 | /* Negative int means reduce maximum width. */ | |
13670 | if (precision <= 0) | |
13671 | precision = -lim; | |
13672 | else | |
13673 | precision = min (precision, -lim); | |
13674 | } | |
a2889657 JB |
13675 | else if (lim > 0) |
13676 | { | |
13677 | /* Padding specified. Don't let it be more than | |
13678 | current maximum. */ | |
5f5c8ee5 GM |
13679 | if (precision > 0) |
13680 | lim = min (precision, lim); | |
13681 | ||
a2889657 JB |
13682 | /* If that's more padding than already wanted, queue it. |
13683 | But don't reduce padding already specified even if | |
13684 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 13685 | field_width = max (lim, field_width); |
a2889657 JB |
13686 | } |
13687 | goto tail_recurse; | |
13688 | } | |
e24c997d | 13689 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
13690 | { |
13691 | register int limit = 50; | |
5f5c8ee5 GM |
13692 | /* Limit is to protect against circular lists. */ |
13693 | while (CONSP (elt) | |
13694 | && --limit > 0 | |
13695 | && (precision <= 0 || n < precision)) | |
a2889657 | 13696 | { |
5f5c8ee5 | 13697 | n += display_mode_element (it, depth, field_width - n, |
9472f927 GM |
13698 | precision - n, XCAR (elt)); |
13699 | elt = XCDR (elt); | |
a2889657 JB |
13700 | } |
13701 | } | |
13702 | } | |
13703 | break; | |
13704 | ||
13705 | default: | |
13706 | invalid: | |
d39b6696 | 13707 | if (frame_title_ptr) |
5f5c8ee5 | 13708 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 13709 | else |
5f5c8ee5 GM |
13710 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
13711 | precision - n, 0, 0); | |
13712 | return n; | |
a2889657 JB |
13713 | } |
13714 | ||
5f5c8ee5 GM |
13715 | /* Pad to FIELD_WIDTH. */ |
13716 | if (field_width > 0 && n < field_width) | |
13717 | { | |
13718 | if (frame_title_ptr) | |
13719 | n += store_frame_title ("", field_width - n, 0); | |
13720 | else | |
13721 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
13722 | 0, 0, 0); | |
13723 | } | |
13724 | ||
13725 | return n; | |
a2889657 | 13726 | } |
5f5c8ee5 GM |
13727 | |
13728 | ||
766525bc RS |
13729 | /* Write a null-terminated, right justified decimal representation of |
13730 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
13731 | ||
13732 | static void | |
13733 | pint2str (buf, width, d) | |
13734 | register char *buf; | |
13735 | register int width; | |
13736 | register int d; | |
13737 | { | |
13738 | register char *p = buf; | |
13739 | ||
13740 | if (d <= 0) | |
5f5c8ee5 | 13741 | *p++ = '0'; |
766525bc | 13742 | else |
5f5c8ee5 | 13743 | { |
766525bc | 13744 | while (d > 0) |
5f5c8ee5 | 13745 | { |
766525bc RS |
13746 | *p++ = d % 10 + '0'; |
13747 | d /= 10; | |
5f5c8ee5 GM |
13748 | } |
13749 | } | |
13750 | ||
13751 | for (width -= (int) (p - buf); width > 0; --width) | |
13752 | *p++ = ' '; | |
766525bc RS |
13753 | *p-- = '\0'; |
13754 | while (p > buf) | |
5f5c8ee5 | 13755 | { |
766525bc RS |
13756 | d = *buf; |
13757 | *buf++ = *p; | |
13758 | *p-- = d; | |
5f5c8ee5 | 13759 | } |
766525bc RS |
13760 | } |
13761 | ||
5f5c8ee5 | 13762 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
13763 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
13764 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
13765 | ||
6693a99a | 13766 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 13767 | |
1c9241f5 KH |
13768 | static char * |
13769 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
13770 | Lisp_Object coding_system; | |
13771 | register char *buf; | |
13772 | int eol_flag; | |
13773 | { | |
1e1078d6 | 13774 | Lisp_Object val; |
916848d8 | 13775 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
13776 | unsigned char *eol_str; |
13777 | int eol_str_len; | |
13778 | /* The EOL conversion we are using. */ | |
13779 | Lisp_Object eoltype; | |
1e1078d6 | 13780 | |
4a09dee0 | 13781 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 13782 | eoltype = Qnil; |
1c9241f5 | 13783 | |
4a09dee0 | 13784 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 13785 | { |
916848d8 RS |
13786 | if (multibyte) |
13787 | *buf++ = '-'; | |
21e989e3 | 13788 | if (eol_flag) |
302f2b38 | 13789 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 13790 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
13791 | } |
13792 | else | |
13793 | { | |
1e1078d6 RS |
13794 | Lisp_Object eolvalue; |
13795 | ||
13796 | eolvalue = Fget (coding_system, Qeol_type); | |
13797 | ||
916848d8 | 13798 | if (multibyte) |
a61b7058 | 13799 | *buf++ = XFASTINT (AREF (val, 1)); |
916848d8 | 13800 | |
1c9241f5 KH |
13801 | if (eol_flag) |
13802 | { | |
1e1078d6 RS |
13803 | /* The EOL conversion that is normal on this system. */ |
13804 | ||
13805 | if (NILP (eolvalue)) /* Not yet decided. */ | |
13806 | eoltype = eol_mnemonic_undecided; | |
13807 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
13808 | eoltype = eol_mnemonic_undecided; | |
13809 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
13810 | eoltype = (XFASTINT (eolvalue) == 0 | |
13811 | ? eol_mnemonic_unix | |
13812 | : (XFASTINT (eolvalue) == 1 | |
13813 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
13814 | } |
13815 | } | |
5f5c8ee5 | 13816 | |
302f2b38 EZ |
13817 | if (eol_flag) |
13818 | { | |
13819 | /* Mention the EOL conversion if it is not the usual one. */ | |
13820 | if (STRINGP (eoltype)) | |
13821 | { | |
13822 | eol_str = XSTRING (eoltype)->data; | |
13823 | eol_str_len = XSTRING (eoltype)->size; | |
13824 | } | |
f30b3499 KH |
13825 | else if (INTEGERP (eoltype) |
13826 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
13827 | { | |
4a09dee0 | 13828 | eol_str = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
260a86a0 | 13829 | eol_str_len = CHAR_STRING (XINT (eoltype), eol_str); |
f30b3499 | 13830 | } |
302f2b38 EZ |
13831 | else |
13832 | { | |
13833 | eol_str = invalid_eol_type; | |
13834 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 13835 | } |
f30b3499 | 13836 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 13837 | buf += eol_str_len; |
1c9241f5 | 13838 | } |
302f2b38 | 13839 | |
1c9241f5 KH |
13840 | return buf; |
13841 | } | |
13842 | ||
a2889657 | 13843 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
13844 | generated by character C. PRECISION >= 0 means don't return a |
13845 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
72f62cb5 GM |
13846 | string returned with spaces to that value. Return 1 in *MULTIBYTE |
13847 | if the result is multibyte text. */ | |
a2889657 | 13848 | |
11e82b76 JB |
13849 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
13850 | ||
a2889657 | 13851 | static char * |
72f62cb5 | 13852 | decode_mode_spec (w, c, field_width, precision, multibyte) |
a2889657 | 13853 | struct window *w; |
68c45bf0 | 13854 | register int c; |
5f5c8ee5 | 13855 | int field_width, precision; |
72f62cb5 | 13856 | int *multibyte; |
a2889657 | 13857 | { |
0b67772d | 13858 | Lisp_Object obj; |
5f5c8ee5 GM |
13859 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
13860 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 13861 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 13862 | |
0b67772d | 13863 | obj = Qnil; |
72f62cb5 | 13864 | *multibyte = 0; |
a2889657 JB |
13865 | |
13866 | switch (c) | |
13867 | { | |
1af9f229 RS |
13868 | case '*': |
13869 | if (!NILP (b->read_only)) | |
13870 | return "%"; | |
13871 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
13872 | return "*"; | |
13873 | return "-"; | |
13874 | ||
13875 | case '+': | |
13876 | /* This differs from %* only for a modified read-only buffer. */ | |
13877 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
13878 | return "*"; | |
13879 | if (!NILP (b->read_only)) | |
13880 | return "%"; | |
13881 | return "-"; | |
13882 | ||
13883 | case '&': | |
13884 | /* This differs from %* in ignoring read-only-ness. */ | |
13885 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
13886 | return "*"; | |
13887 | return "-"; | |
13888 | ||
13889 | case '%': | |
13890 | return "%"; | |
13891 | ||
13892 | case '[': | |
13893 | { | |
13894 | int i; | |
13895 | char *p; | |
13896 | ||
13897 | if (command_loop_level > 5) | |
13898 | return "[[[... "; | |
13899 | p = decode_mode_spec_buf; | |
13900 | for (i = 0; i < command_loop_level; i++) | |
13901 | *p++ = '['; | |
13902 | *p = 0; | |
13903 | return decode_mode_spec_buf; | |
13904 | } | |
13905 | ||
13906 | case ']': | |
13907 | { | |
13908 | int i; | |
13909 | char *p; | |
13910 | ||
13911 | if (command_loop_level > 5) | |
13912 | return " ...]]]"; | |
13913 | p = decode_mode_spec_buf; | |
13914 | for (i = 0; i < command_loop_level; i++) | |
13915 | *p++ = ']'; | |
13916 | *p = 0; | |
13917 | return decode_mode_spec_buf; | |
13918 | } | |
13919 | ||
13920 | case '-': | |
13921 | { | |
1af9f229 | 13922 | register int i; |
5f5c8ee5 GM |
13923 | |
13924 | /* Let lots_of_dashes be a string of infinite length. */ | |
13925 | if (field_width <= 0 | |
13926 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 13927 | { |
5f5c8ee5 GM |
13928 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
13929 | decode_mode_spec_buf[i] = '-'; | |
13930 | decode_mode_spec_buf[i] = '\0'; | |
13931 | return decode_mode_spec_buf; | |
1af9f229 | 13932 | } |
5f5c8ee5 GM |
13933 | else |
13934 | return lots_of_dashes; | |
1af9f229 RS |
13935 | } |
13936 | ||
a2889657 | 13937 | case 'b': |
d39b6696 | 13938 | obj = b->name; |
a2889657 JB |
13939 | break; |
13940 | ||
1af9f229 RS |
13941 | case 'c': |
13942 | { | |
13943 | int col = current_column (); | |
ac90c44f | 13944 | w->column_number_displayed = make_number (col); |
5f5c8ee5 | 13945 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
13946 | return decode_mode_spec_buf; |
13947 | } | |
13948 | ||
13949 | case 'F': | |
13950 | /* %F displays the frame name. */ | |
5f5c8ee5 | 13951 | if (!NILP (f->title)) |
95184b48 | 13952 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 13953 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 13954 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 13955 | return "Emacs"; |
1af9f229 | 13956 | |
a2889657 | 13957 | case 'f': |
d39b6696 | 13958 | obj = b->filename; |
a2889657 JB |
13959 | break; |
13960 | ||
aa6d10fa RS |
13961 | case 'l': |
13962 | { | |
12adba34 RS |
13963 | int startpos = XMARKER (w->start)->charpos; |
13964 | int startpos_byte = marker_byte_position (w->start); | |
13965 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 13966 | int nlines, junk; |
aa6d10fa RS |
13967 | int height = XFASTINT (w->height); |
13968 | ||
13969 | /* If we decided that this buffer isn't suitable for line numbers, | |
13970 | don't forget that too fast. */ | |
13971 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 13972 | goto no_value; |
5300fd39 RS |
13973 | /* But do forget it, if the window shows a different buffer now. */ |
13974 | else if (BUFFERP (w->base_line_pos)) | |
13975 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
13976 | |
13977 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 13978 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 13979 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
13980 | { |
13981 | w->base_line_pos = Qnil; | |
13982 | w->base_line_number = Qnil; | |
766525bc | 13983 | goto no_value; |
aa6d10fa RS |
13984 | } |
13985 | ||
13986 | if (!NILP (w->base_line_number) | |
13987 | && !NILP (w->base_line_pos) | |
12adba34 | 13988 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
13989 | { |
13990 | line = XFASTINT (w->base_line_number); | |
13991 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 13992 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
13993 | } |
13994 | else | |
13995 | { | |
13996 | line = 1; | |
d39b6696 | 13997 | linepos = BUF_BEGV (b); |
12adba34 | 13998 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
13999 | } |
14000 | ||
14001 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
14002 | nlines = display_count_lines (linepos, linepos_byte, |
14003 | startpos_byte, | |
14004 | startpos, &junk); | |
aa6d10fa RS |
14005 | |
14006 | topline = nlines + line; | |
14007 | ||
14008 | /* Determine a new base line, if the old one is too close | |
14009 | or too far away, or if we did not have one. | |
14010 | "Too close" means it's plausible a scroll-down would | |
14011 | go back past it. */ | |
d39b6696 | 14012 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 14013 | { |
ac90c44f GM |
14014 | w->base_line_number = make_number (topline); |
14015 | w->base_line_pos = make_number (BUF_BEGV (b)); | |
aa6d10fa RS |
14016 | } |
14017 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 14018 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 14019 | { |
d39b6696 | 14020 | int limit = BUF_BEGV (b); |
12adba34 | 14021 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 14022 | int position; |
5d121aec | 14023 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
14024 | |
14025 | if (startpos - distance > limit) | |
12adba34 RS |
14026 | { |
14027 | limit = startpos - distance; | |
14028 | limit_byte = CHAR_TO_BYTE (limit); | |
14029 | } | |
aa6d10fa | 14030 | |
12adba34 RS |
14031 | nlines = display_count_lines (startpos, startpos_byte, |
14032 | limit_byte, | |
14033 | - (height * 2 + 30), | |
aa6d10fa RS |
14034 | &position); |
14035 | /* If we couldn't find the lines we wanted within | |
5d121aec | 14036 | line_number_display_limit_width chars per line, |
aa6d10fa | 14037 | give up on line numbers for this window. */ |
12adba34 | 14038 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
14039 | { |
14040 | w->base_line_pos = w->buffer; | |
14041 | w->base_line_number = Qnil; | |
766525bc | 14042 | goto no_value; |
aa6d10fa RS |
14043 | } |
14044 | ||
ac90c44f GM |
14045 | w->base_line_number = make_number (topline - nlines); |
14046 | w->base_line_pos = make_number (BYTE_TO_CHAR (position)); | |
aa6d10fa RS |
14047 | } |
14048 | ||
14049 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
14050 | nlines = display_count_lines (startpos, startpos_byte, |
14051 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
14052 | |
14053 | /* Record that we did display the line number. */ | |
14054 | line_number_displayed = 1; | |
14055 | ||
14056 | /* Make the string to show. */ | |
5f5c8ee5 | 14057 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 14058 | return decode_mode_spec_buf; |
766525bc RS |
14059 | no_value: |
14060 | { | |
14061 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
14062 | int pad = field_width - 2; |
14063 | while (pad-- > 0) | |
14064 | *p++ = ' '; | |
14065 | *p++ = '?'; | |
b357b9d4 KR |
14066 | *p++ = '?'; |
14067 | *p = '\0'; | |
766525bc RS |
14068 | return decode_mode_spec_buf; |
14069 | } | |
aa6d10fa RS |
14070 | } |
14071 | break; | |
14072 | ||
a2889657 | 14073 | case 'm': |
d39b6696 | 14074 | obj = b->mode_name; |
a2889657 JB |
14075 | break; |
14076 | ||
14077 | case 'n': | |
d39b6696 | 14078 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
14079 | return " Narrow"; |
14080 | break; | |
14081 | ||
a2889657 JB |
14082 | case 'p': |
14083 | { | |
14084 | int pos = marker_position (w->start); | |
d39b6696 | 14085 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 14086 | |
d39b6696 | 14087 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 14088 | { |
d39b6696 | 14089 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14090 | return "All"; |
14091 | else | |
14092 | return "Bottom"; | |
14093 | } | |
d39b6696 | 14094 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
14095 | return "Top"; |
14096 | else | |
14097 | { | |
3c7d31b9 RS |
14098 | if (total > 1000000) |
14099 | /* Do it differently for a large value, to avoid overflow. */ | |
14100 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14101 | else | |
14102 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
14103 | /* We can't normally display a 3-digit number, |
14104 | so get us a 2-digit number that is close. */ | |
14105 | if (total == 100) | |
14106 | total = 99; | |
14107 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14108 | return decode_mode_spec_buf; | |
14109 | } | |
14110 | } | |
14111 | ||
8ffcb79f RS |
14112 | /* Display percentage of size above the bottom of the screen. */ |
14113 | case 'P': | |
14114 | { | |
14115 | int toppos = marker_position (w->start); | |
d39b6696 KH |
14116 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
14117 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 14118 | |
d39b6696 | 14119 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 14120 | { |
d39b6696 | 14121 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14122 | return "All"; |
14123 | else | |
14124 | return "Bottom"; | |
14125 | } | |
14126 | else | |
14127 | { | |
3c7d31b9 RS |
14128 | if (total > 1000000) |
14129 | /* Do it differently for a large value, to avoid overflow. */ | |
14130 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
14131 | else | |
14132 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
14133 | /* We can't normally display a 3-digit number, |
14134 | so get us a 2-digit number that is close. */ | |
14135 | if (total == 100) | |
14136 | total = 99; | |
d39b6696 | 14137 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
14138 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
14139 | else | |
14140 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
14141 | return decode_mode_spec_buf; | |
14142 | } | |
14143 | } | |
14144 | ||
1af9f229 RS |
14145 | case 's': |
14146 | /* status of process */ | |
14147 | obj = Fget_buffer_process (w->buffer); | |
14148 | if (NILP (obj)) | |
14149 | return "no process"; | |
14150 | #ifdef subprocesses | |
14151 | obj = Fsymbol_name (Fprocess_status (obj)); | |
14152 | #endif | |
14153 | break; | |
d39b6696 | 14154 | |
1af9f229 RS |
14155 | case 't': /* indicate TEXT or BINARY */ |
14156 | #ifdef MODE_LINE_BINARY_TEXT | |
14157 | return MODE_LINE_BINARY_TEXT (b); | |
14158 | #else | |
14159 | return "T"; | |
14160 | #endif | |
1c9241f5 KH |
14161 | |
14162 | case 'z': | |
14163 | /* coding-system (not including end-of-line format) */ | |
14164 | case 'Z': | |
14165 | /* coding-system (including end-of-line type) */ | |
14166 | { | |
14167 | int eol_flag = (c == 'Z'); | |
539b4d41 | 14168 | char *p = decode_mode_spec_buf; |
1c9241f5 | 14169 | |
d30e754b | 14170 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 14171 | { |
11c52c4f RS |
14172 | /* No need to mention EOL here--the terminal never needs |
14173 | to do EOL conversion. */ | |
14174 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
14175 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 14176 | } |
f13c925f | 14177 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 14178 | p, eol_flag); |
f13c925f | 14179 | |
11c52c4f | 14180 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
14181 | #ifdef subprocesses |
14182 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
14183 | if (PROCESSP (obj)) | |
14184 | { | |
14185 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
14186 | p, eol_flag); | |
14187 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
14188 | p, eol_flag); | |
14189 | } | |
14190 | #endif /* subprocesses */ | |
11c52c4f | 14191 | #endif /* 0 */ |
1c9241f5 KH |
14192 | *p = 0; |
14193 | return decode_mode_spec_buf; | |
14194 | } | |
a2889657 | 14195 | } |
d39b6696 | 14196 | |
e24c997d | 14197 | if (STRINGP (obj)) |
72f62cb5 GM |
14198 | { |
14199 | *multibyte = STRING_MULTIBYTE (obj); | |
14200 | return (char *) XSTRING (obj)->data; | |
14201 | } | |
a2889657 JB |
14202 | else |
14203 | return ""; | |
14204 | } | |
5f5c8ee5 GM |
14205 | |
14206 | ||
12adba34 RS |
14207 | /* Count up to COUNT lines starting from START / START_BYTE. |
14208 | But don't go beyond LIMIT_BYTE. | |
14209 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 14210 | |
12adba34 | 14211 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
14212 | |
14213 | static int | |
12adba34 RS |
14214 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
14215 | int start, start_byte, limit_byte, count; | |
14216 | int *byte_pos_ptr; | |
59b49f63 | 14217 | { |
59b49f63 RS |
14218 | register unsigned char *cursor; |
14219 | unsigned char *base; | |
14220 | ||
14221 | register int ceiling; | |
14222 | register unsigned char *ceiling_addr; | |
12adba34 | 14223 | int orig_count = count; |
59b49f63 RS |
14224 | |
14225 | /* If we are not in selective display mode, | |
14226 | check only for newlines. */ | |
12adba34 RS |
14227 | int selective_display = (!NILP (current_buffer->selective_display) |
14228 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
14229 | |
14230 | if (count > 0) | |
12adba34 RS |
14231 | { |
14232 | while (start_byte < limit_byte) | |
14233 | { | |
14234 | ceiling = BUFFER_CEILING_OF (start_byte); | |
14235 | ceiling = min (limit_byte - 1, ceiling); | |
14236 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
14237 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
14238 | while (1) | |
14239 | { | |
14240 | if (selective_display) | |
14241 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
14242 | ; | |
14243 | else | |
14244 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
14245 | ; | |
14246 | ||
14247 | if (cursor != ceiling_addr) | |
14248 | { | |
14249 | if (--count == 0) | |
14250 | { | |
14251 | start_byte += cursor - base + 1; | |
14252 | *byte_pos_ptr = start_byte; | |
14253 | return orig_count; | |
14254 | } | |
14255 | else | |
14256 | if (++cursor == ceiling_addr) | |
14257 | break; | |
14258 | } | |
14259 | else | |
14260 | break; | |
14261 | } | |
14262 | start_byte += cursor - base; | |
14263 | } | |
14264 | } | |
59b49f63 RS |
14265 | else |
14266 | { | |
12adba34 RS |
14267 | while (start_byte > limit_byte) |
14268 | { | |
14269 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
14270 | ceiling = max (limit_byte, ceiling); | |
14271 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
14272 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
14273 | while (1) |
14274 | { | |
12adba34 RS |
14275 | if (selective_display) |
14276 | while (--cursor != ceiling_addr | |
14277 | && *cursor != '\n' && *cursor != 015) | |
14278 | ; | |
14279 | else | |
14280 | while (--cursor != ceiling_addr && *cursor != '\n') | |
14281 | ; | |
14282 | ||
59b49f63 RS |
14283 | if (cursor != ceiling_addr) |
14284 | { | |
14285 | if (++count == 0) | |
14286 | { | |
12adba34 RS |
14287 | start_byte += cursor - base + 1; |
14288 | *byte_pos_ptr = start_byte; | |
14289 | /* When scanning backwards, we should | |
14290 | not count the newline posterior to which we stop. */ | |
14291 | return - orig_count - 1; | |
59b49f63 RS |
14292 | } |
14293 | } | |
14294 | else | |
14295 | break; | |
14296 | } | |
12adba34 RS |
14297 | /* Here we add 1 to compensate for the last decrement |
14298 | of CURSOR, which took it past the valid range. */ | |
14299 | start_byte += cursor - base + 1; | |
59b49f63 RS |
14300 | } |
14301 | } | |
14302 | ||
12adba34 | 14303 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 14304 | |
12adba34 RS |
14305 | if (count < 0) |
14306 | return - orig_count + count; | |
14307 | return orig_count - count; | |
aa6d10fa | 14308 | |
12adba34 | 14309 | } |
a2889657 | 14310 | |
a2889657 | 14311 | |
5f5c8ee5 GM |
14312 | \f |
14313 | /*********************************************************************** | |
14314 | Displaying strings | |
14315 | ***********************************************************************/ | |
278feba9 | 14316 | |
5f5c8ee5 | 14317 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 14318 | |
5f5c8ee5 GM |
14319 | If STRING is non-null, display that C string. Otherwise, the Lisp |
14320 | string LISP_STRING is displayed. | |
a2889657 | 14321 | |
5f5c8ee5 GM |
14322 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
14323 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
14324 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 14325 | |
5f5c8ee5 GM |
14326 | Display the string in the environment given by IT, but use the |
14327 | standard display table, temporarily. | |
a3788d53 | 14328 | |
5f5c8ee5 GM |
14329 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
14330 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
14331 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
14332 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
14333 | ||
14334 | PRECISION is the maximum number of characters to output from | |
14335 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 14336 | |
5f5c8ee5 | 14337 | This is roughly equivalent to printf format specifiers: |
a2889657 | 14338 | |
5f5c8ee5 GM |
14339 | FIELD_WIDTH PRECISION PRINTF |
14340 | ---------------------------------------- | |
14341 | -1 -1 %s | |
14342 | -1 10 %.10s | |
14343 | 10 -1 %10s | |
14344 | 20 10 %20.10s | |
a2889657 | 14345 | |
5f5c8ee5 GM |
14346 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
14347 | display them, and < 0 means obey the current buffer's value of | |
14348 | enable_multibyte_characters. | |
278feba9 | 14349 | |
5f5c8ee5 | 14350 | Value is the number of glyphs produced. */ |
b1d1124b | 14351 | |
5f5c8ee5 GM |
14352 | static int |
14353 | display_string (string, lisp_string, face_string, face_string_pos, | |
14354 | start, it, field_width, precision, max_x, multibyte) | |
14355 | unsigned char *string; | |
14356 | Lisp_Object lisp_string; | |
68c45bf0 PE |
14357 | Lisp_Object face_string; |
14358 | int face_string_pos; | |
5f5c8ee5 GM |
14359 | int start; |
14360 | struct it *it; | |
14361 | int field_width, precision, max_x; | |
14362 | int multibyte; | |
14363 | { | |
14364 | int hpos_at_start = it->hpos; | |
14365 | int saved_face_id = it->face_id; | |
14366 | struct glyph_row *row = it->glyph_row; | |
14367 | ||
14368 | /* Initialize the iterator IT for iteration over STRING beginning | |
e719f5ae | 14369 | with index START. */ |
5f5c8ee5 GM |
14370 | reseat_to_string (it, string, lisp_string, start, |
14371 | precision, field_width, multibyte); | |
14372 | ||
14373 | /* If displaying STRING, set up the face of the iterator | |
14374 | from LISP_STRING, if that's given. */ | |
14375 | if (STRINGP (face_string)) | |
14376 | { | |
14377 | int endptr; | |
14378 | struct face *face; | |
14379 | ||
14380 | it->face_id | |
14381 | = face_at_string_position (it->w, face_string, face_string_pos, | |
14382 | 0, it->region_beg_charpos, | |
14383 | it->region_end_charpos, | |
5de7c6f2 | 14384 | &endptr, it->base_face_id, 0); |
5f5c8ee5 GM |
14385 | face = FACE_FROM_ID (it->f, it->face_id); |
14386 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 14387 | } |
a2889657 | 14388 | |
5f5c8ee5 GM |
14389 | /* Set max_x to the maximum allowed X position. Don't let it go |
14390 | beyond the right edge of the window. */ | |
14391 | if (max_x <= 0) | |
14392 | max_x = it->last_visible_x; | |
14393 | else | |
14394 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 14395 | |
5f5c8ee5 GM |
14396 | /* Skip over display elements that are not visible. because IT->w is |
14397 | hscrolled. */ | |
14398 | if (it->current_x < it->first_visible_x) | |
14399 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
14400 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 14401 | |
5f5c8ee5 GM |
14402 | row->ascent = it->max_ascent; |
14403 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
14404 | row->phys_ascent = it->max_phys_ascent; |
14405 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 14406 | |
5f5c8ee5 GM |
14407 | /* This condition is for the case that we are called with current_x |
14408 | past last_visible_x. */ | |
14409 | while (it->current_x < max_x) | |
a2889657 | 14410 | { |
5f5c8ee5 | 14411 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 14412 | |
5f5c8ee5 GM |
14413 | /* Get the next display element. */ |
14414 | if (!get_next_display_element (it)) | |
90adcf20 | 14415 | break; |
1c9241f5 | 14416 | |
5f5c8ee5 GM |
14417 | /* Produce glyphs. */ |
14418 | x_before = it->current_x; | |
14419 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
14420 | PRODUCE_GLYPHS (it); | |
90adcf20 | 14421 | |
5f5c8ee5 GM |
14422 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
14423 | i = 0; | |
14424 | x = x_before; | |
14425 | while (i < nglyphs) | |
a2889657 | 14426 | { |
5f5c8ee5 GM |
14427 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
14428 | ||
14429 | if (!it->truncate_lines_p | |
14430 | && x + glyph->pixel_width > max_x) | |
14431 | { | |
14432 | /* End of continued line or max_x reached. */ | |
37be86f2 KH |
14433 | if (CHAR_GLYPH_PADDING_P (*glyph)) |
14434 | { | |
14435 | /* A wide character is unbreakable. */ | |
14436 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
14437 | it->current_x = x_before; | |
14438 | } | |
14439 | else | |
14440 | { | |
14441 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
14442 | it->current_x = x; | |
14443 | } | |
5f5c8ee5 GM |
14444 | break; |
14445 | } | |
14446 | else if (x + glyph->pixel_width > it->first_visible_x) | |
14447 | { | |
14448 | /* Glyph is at least partially visible. */ | |
14449 | ++it->hpos; | |
14450 | if (x < it->first_visible_x) | |
14451 | it->glyph_row->x = x - it->first_visible_x; | |
14452 | } | |
14453 | else | |
a2889657 | 14454 | { |
5f5c8ee5 GM |
14455 | /* Glyph is off the left margin of the display area. |
14456 | Should not happen. */ | |
14457 | abort (); | |
a2889657 | 14458 | } |
5f5c8ee5 GM |
14459 | |
14460 | row->ascent = max (row->ascent, it->max_ascent); | |
14461 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
14462 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
14463 | row->phys_height = max (row->phys_height, | |
14464 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
14465 | x += glyph->pixel_width; |
14466 | ++i; | |
a2889657 | 14467 | } |
5f5c8ee5 GM |
14468 | |
14469 | /* Stop if max_x reached. */ | |
14470 | if (i < nglyphs) | |
14471 | break; | |
14472 | ||
14473 | /* Stop at line ends. */ | |
14474 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 14475 | { |
5f5c8ee5 GM |
14476 | it->continuation_lines_width = 0; |
14477 | break; | |
a2889657 | 14478 | } |
1c9241f5 | 14479 | |
cafafe0b | 14480 | set_iterator_to_next (it, 1); |
a688bb24 | 14481 | |
5f5c8ee5 GM |
14482 | /* Stop if truncating at the right edge. */ |
14483 | if (it->truncate_lines_p | |
14484 | && it->current_x >= it->last_visible_x) | |
14485 | { | |
14486 | /* Add truncation mark, but don't do it if the line is | |
14487 | truncated at a padding space. */ | |
14488 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 14489 | { |
5f5c8ee5 | 14490 | if (!FRAME_WINDOW_P (it->f)) |
37be86f2 KH |
14491 | { |
14492 | int i, n; | |
14493 | ||
9299cb15 | 14494 | if (it->current_x > it->last_visible_x) |
37be86f2 | 14495 | { |
9299cb15 KH |
14496 | for (i = row->used[TEXT_AREA] - 1; i > 0; --i) |
14497 | if (!CHAR_GLYPH_PADDING_P (row->glyphs[TEXT_AREA][i])) | |
14498 | break; | |
14499 | for (n = row->used[TEXT_AREA]; i < n; ++i) | |
14500 | { | |
14501 | row->used[TEXT_AREA] = i; | |
14502 | produce_special_glyphs (it, IT_TRUNCATION); | |
14503 | } | |
37be86f2 | 14504 | } |
9299cb15 | 14505 | produce_special_glyphs (it, IT_TRUNCATION); |
37be86f2 | 14506 | } |
5f5c8ee5 | 14507 | it->glyph_row->truncated_on_right_p = 1; |
1c9241f5 | 14508 | } |
5f5c8ee5 | 14509 | break; |
1c9241f5 | 14510 | } |
a2889657 JB |
14511 | } |
14512 | ||
5f5c8ee5 GM |
14513 | /* Maybe insert a truncation at the left. */ |
14514 | if (it->first_visible_x | |
14515 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 14516 | { |
5f5c8ee5 GM |
14517 | if (!FRAME_WINDOW_P (it->f)) |
14518 | insert_left_trunc_glyphs (it); | |
14519 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
14520 | } |
14521 | ||
5f5c8ee5 GM |
14522 | it->face_id = saved_face_id; |
14523 | ||
14524 | /* Value is number of columns displayed. */ | |
14525 | return it->hpos - hpos_at_start; | |
14526 | } | |
a2889657 | 14527 | |
a2889657 | 14528 | |
a2889657 | 14529 | \f |
3b6b6db7 | 14530 | /* This is like a combination of memq and assq. Return 1/2 if PROPVAL |
5f5c8ee5 GM |
14531 | appears as an element of LIST or as the car of an element of LIST. |
14532 | If PROPVAL is a list, compare each element against LIST in that | |
3b6b6db7 SM |
14533 | way, and return 1/2 if any element of PROPVAL is found in LIST. |
14534 | Otherwise return 0. This function cannot quit. | |
14535 | The return value is 2 if the text is invisible but with an ellipsis | |
14536 | and 1 if it's invisible and without an ellipsis. */ | |
642eefc6 RS |
14537 | |
14538 | int | |
14539 | invisible_p (propval, list) | |
14540 | register Lisp_Object propval; | |
14541 | Lisp_Object list; | |
14542 | { | |
3b6b6db7 SM |
14543 | register Lisp_Object tail, proptail; |
14544 | ||
14545 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
14546 | { | |
14547 | register Lisp_Object tem; | |
14548 | tem = XCAR (tail); | |
14549 | if (EQ (propval, tem)) | |
14550 | return 1; | |
14551 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
14552 | return NILP (XCDR (tem)) ? 1 : 2; | |
14553 | } | |
14554 | ||
14555 | if (CONSP (propval)) | |
14556 | { | |
14557 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
14558 | { | |
14559 | Lisp_Object propelt; | |
14560 | propelt = XCAR (proptail); | |
14561 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
14562 | { | |
14563 | register Lisp_Object tem; | |
14564 | tem = XCAR (tail); | |
14565 | if (EQ (propelt, tem)) | |
14566 | return 1; | |
14567 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
14568 | return NILP (XCDR (tem)) ? 1 : 2; | |
14569 | } | |
14570 | } | |
14571 | } | |
14572 | ||
14573 | return 0; | |
642eefc6 | 14574 | } |
5f5c8ee5 | 14575 | |
642eefc6 | 14576 | \f |
5f5c8ee5 GM |
14577 | /*********************************************************************** |
14578 | Initialization | |
14579 | ***********************************************************************/ | |
14580 | ||
a2889657 JB |
14581 | void |
14582 | syms_of_xdisp () | |
14583 | { | |
c6e89d6c GM |
14584 | Vwith_echo_area_save_vector = Qnil; |
14585 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 14586 | |
c6e89d6c GM |
14587 | Vmessage_stack = Qnil; |
14588 | staticpro (&Vmessage_stack); | |
14589 | ||
735c094c | 14590 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 14591 | staticpro (&Qinhibit_redisplay); |
735c094c | 14592 | |
5f5c8ee5 GM |
14593 | #if GLYPH_DEBUG |
14594 | defsubr (&Sdump_glyph_matrix); | |
14595 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 14596 | defsubr (&Sdump_tool_bar_row); |
62397849 | 14597 | defsubr (&Strace_redisplay); |
bf9249e3 | 14598 | defsubr (&Strace_to_stderr); |
5f5c8ee5 | 14599 | #endif |
99a5de87 | 14600 | #ifdef HAVE_WINDOW_SYSTEM |
57c28064 | 14601 | defsubr (&Stool_bar_lines_needed); |
99a5de87 | 14602 | #endif |
5f5c8ee5 | 14603 | |
cf074754 RS |
14604 | staticpro (&Qmenu_bar_update_hook); |
14605 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
14606 | ||
d46fb96a | 14607 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 14608 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 14609 | |
399164b4 KH |
14610 | staticpro (&Qoverriding_local_map); |
14611 | Qoverriding_local_map = intern ("overriding-local-map"); | |
14612 | ||
75c43375 RS |
14613 | staticpro (&Qwindow_scroll_functions); |
14614 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
14615 | ||
e0bfbde6 RS |
14616 | staticpro (&Qredisplay_end_trigger_functions); |
14617 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 14618 | |
2e54982e RS |
14619 | staticpro (&Qinhibit_point_motion_hooks); |
14620 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
14621 | ||
9499d71b GM |
14622 | QCdata = intern (":data"); |
14623 | staticpro (&QCdata); | |
5f5c8ee5 | 14624 | Qdisplay = intern ("display"); |
f3751a65 | 14625 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
14626 | Qspace_width = intern ("space-width"); |
14627 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
14628 | Qraise = intern ("raise"); |
14629 | staticpro (&Qraise); | |
14630 | Qspace = intern ("space"); | |
14631 | staticpro (&Qspace); | |
f3751a65 GM |
14632 | Qmargin = intern ("margin"); |
14633 | staticpro (&Qmargin); | |
5f5c8ee5 | 14634 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 14635 | staticpro (&Qleft_margin); |
5f5c8ee5 | 14636 | Qright_margin = intern ("right-margin"); |
f3751a65 | 14637 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
14638 | Qalign_to = intern ("align-to"); |
14639 | staticpro (&Qalign_to); | |
14640 | QCalign_to = intern (":align-to"); | |
14641 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
14642 | Qrelative_width = intern ("relative-width"); |
14643 | staticpro (&Qrelative_width); | |
14644 | QCrelative_width = intern (":relative-width"); | |
14645 | staticpro (&QCrelative_width); | |
14646 | QCrelative_height = intern (":relative-height"); | |
14647 | staticpro (&QCrelative_height); | |
14648 | QCeval = intern (":eval"); | |
14649 | staticpro (&QCeval); | |
d3acf96b | 14650 | Qwhen = intern ("when"); |
f3751a65 | 14651 | staticpro (&Qwhen); |
886bd6f2 GM |
14652 | QCfile = intern (":file"); |
14653 | staticpro (&QCfile); | |
5f5c8ee5 GM |
14654 | Qfontified = intern ("fontified"); |
14655 | staticpro (&Qfontified); | |
14656 | Qfontification_functions = intern ("fontification-functions"); | |
14657 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
14658 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
14659 | staticpro (&Qtrailing_whitespace); | |
14660 | Qimage = intern ("image"); | |
14661 | staticpro (&Qimage); | |
ad4f174e GM |
14662 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
14663 | staticpro (&Qmessage_truncate_lines); | |
af79bccb RS |
14664 | Qcursor_in_non_selected_windows = intern ("cursor-in-non-selected-windows"); |
14665 | staticpro (&Qcursor_in_non_selected_windows); | |
6422c1d7 GM |
14666 | Qgrow_only = intern ("grow-only"); |
14667 | staticpro (&Qgrow_only); | |
e1477f43 GM |
14668 | Qinhibit_menubar_update = intern ("inhibit-menubar-update"); |
14669 | staticpro (&Qinhibit_menubar_update); | |
30a3f61c GM |
14670 | Qinhibit_eval_during_redisplay = intern ("inhibit-eval-during-redisplay"); |
14671 | staticpro (&Qinhibit_eval_during_redisplay); | |
b384d6f8 GM |
14672 | Qposition = intern ("position"); |
14673 | staticpro (&Qposition); | |
14674 | Qbuffer_position = intern ("buffer-position"); | |
14675 | staticpro (&Qbuffer_position); | |
14676 | Qobject = intern ("object"); | |
14677 | staticpro (&Qobject); | |
5f5c8ee5 | 14678 | |
a2889657 JB |
14679 | last_arrow_position = Qnil; |
14680 | last_arrow_string = Qnil; | |
f3751a65 GM |
14681 | staticpro (&last_arrow_position); |
14682 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
14683 | |
14684 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
14685 | staticpro (&echo_buffer[0]); | |
14686 | staticpro (&echo_buffer[1]); | |
14687 | ||
14688 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
14689 | staticpro (&echo_area_buffer[0]); | |
14690 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 14691 | |
6a94510a GM |
14692 | Vmessages_buffer_name = build_string ("*Messages*"); |
14693 | staticpro (&Vmessages_buffer_name); | |
14694 | ||
7ee72033 MB |
14695 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
14696 | doc: /* Non-nil means highlight trailing whitespace. | |
228299fa | 14697 | The face used for trailing whitespace is `trailing-whitespace'. */); |
8f897821 GM |
14698 | Vshow_trailing_whitespace = Qnil; |
14699 | ||
7ee72033 MB |
14700 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
14701 | doc: /* Non-nil means don't actually do any redisplay. | |
228299fa | 14702 | This is used for internal purposes. */); |
735c094c KH |
14703 | Vinhibit_redisplay = Qnil; |
14704 | ||
7ee72033 MB |
14705 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
14706 | doc: /* String (or mode line construct) included (normally) in `mode-line-format'. */); | |
a2889657 JB |
14707 | Vglobal_mode_string = Qnil; |
14708 | ||
7ee72033 MB |
14709 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, |
14710 | doc: /* Marker for where to display an arrow on top of the buffer text. | |
228299fa GM |
14711 | This must be the beginning of a line in order to work. |
14712 | See also `overlay-arrow-string'. */); | |
a2889657 JB |
14713 | Voverlay_arrow_position = Qnil; |
14714 | ||
7ee72033 MB |
14715 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, |
14716 | doc: /* String to display as an arrow. See also `overlay-arrow-position'. */); | |
a2889657 JB |
14717 | Voverlay_arrow_string = Qnil; |
14718 | ||
7ee72033 MB |
14719 | DEFVAR_INT ("scroll-step", &scroll_step, |
14720 | doc: /* *The number of lines to try scrolling a window by when point moves out. | |
228299fa GM |
14721 | If that fails to bring point back on frame, point is centered instead. |
14722 | If this is zero, point is always centered after it moves off frame. | |
14723 | If you want scrolling to always be a line at a time, you should set | |
14724 | `scroll-conservatively' to a large value rather than set this to 1. */); | |
14725 | ||
7ee72033 MB |
14726 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
14727 | doc: /* *Scroll up to this many lines, to bring point back on screen. | |
228299fa GM |
14728 | A value of zero means to scroll the text to center point vertically |
14729 | in the window. */); | |
0789adb2 RS |
14730 | scroll_conservatively = 0; |
14731 | ||
7ee72033 MB |
14732 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
14733 | doc: /* *Number of lines of margin at the top and bottom of a window. | |
228299fa GM |
14734 | Recenter the window whenever point gets within this many lines |
14735 | of the top or bottom of the window. */); | |
9afd2168 RS |
14736 | scroll_margin = 0; |
14737 | ||
5f5c8ee5 | 14738 | #if GLYPH_DEBUG |
7ee72033 | 14739 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */); |
5f5c8ee5 | 14740 | #endif |
a2889657 JB |
14741 | |
14742 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
7ee72033 MB |
14743 | &truncate_partial_width_windows, |
14744 | doc: /* *Non-nil means truncate lines in all windows less than full frame wide. */); | |
a2889657 JB |
14745 | truncate_partial_width_windows = 1; |
14746 | ||
7ee72033 MB |
14747 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, |
14748 | doc: /* nil means display the mode-line/header-line/menu-bar in the default face. | |
228299fa GM |
14749 | Any other value means to use the appropriate face, `mode-line', |
14750 | `header-line', or `menu' respectively. | |
14751 | ||
14752 | This variable is deprecated; please change the above faces instead. */); | |
1862a24e | 14753 | mode_line_inverse_video = 1; |
aa6d10fa | 14754 | |
7ee72033 MB |
14755 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
14756 | doc: /* *Maximum buffer size for which line number should be displayed. | |
228299fa GM |
14757 | If the buffer is bigger than this, the line number does not appear |
14758 | in the mode line. A value of nil means no limit. */); | |
090703f4 | 14759 | Vline_number_display_limit = Qnil; |
fba9ce76 | 14760 | |
090703f4 | 14761 | DEFVAR_INT ("line-number-display-limit-width", |
7ee72033 MB |
14762 | &line_number_display_limit_width, |
14763 | doc: /* *Maximum line width (in characters) for line number display. | |
228299fa GM |
14764 | If the average length of the lines near point is bigger than this, then the |
14765 | line number may be omitted from the mode line. */); | |
5d121aec KH |
14766 | line_number_display_limit_width = 200; |
14767 | ||
7ee72033 MB |
14768 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
14769 | doc: /* *Non-nil means highlight region even in nonselected windows. */); | |
293a54ce | 14770 | highlight_nonselected_windows = 0; |
d39b6696 | 14771 | |
7ee72033 MB |
14772 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, |
14773 | doc: /* Non-nil if more than one frame is visible on this display. | |
228299fa GM |
14774 | Minibuffer-only frames don't count, but iconified frames do. |
14775 | This variable is not guaranteed to be accurate except while processing | |
14776 | `frame-title-format' and `icon-title-format'. */); | |
14777 | ||
7ee72033 MB |
14778 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, |
14779 | doc: /* Template for displaying the title bar of visible frames. | |
228299fa GM |
14780 | \(Assuming the window manager supports this feature.) |
14781 | This variable has the same structure as `mode-line-format' (which see), | |
14782 | and is used only on frames for which no explicit name has been set | |
14783 | \(see `modify-frame-parameters'). */); | |
7ee72033 MB |
14784 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, |
14785 | doc: /* Template for displaying the title bar of an iconified frame. | |
228299fa GM |
14786 | \(Assuming the window manager supports this feature.) |
14787 | This variable has the same structure as `mode-line-format' (which see), | |
14788 | and is used only on frames for which no explicit name has been set | |
14789 | \(see `modify-frame-parameters'). */); | |
d39b6696 KH |
14790 | Vicon_title_format |
14791 | = Vframe_title_format | |
14792 | = Fcons (intern ("multiple-frames"), | |
14793 | Fcons (build_string ("%b"), | |
3ebf0ea9 | 14794 | Fcons (Fcons (empty_string, |
d39b6696 KH |
14795 | Fcons (intern ("invocation-name"), |
14796 | Fcons (build_string ("@"), | |
14797 | Fcons (intern ("system-name"), | |
14798 | Qnil)))), | |
14799 | Qnil))); | |
5992c4f7 | 14800 | |
7ee72033 MB |
14801 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, |
14802 | doc: /* Maximum number of lines to keep in the message log buffer. | |
228299fa GM |
14803 | If nil, disable message logging. If t, log messages but don't truncate |
14804 | the buffer when it becomes large. */); | |
ac90c44f | 14805 | Vmessage_log_max = make_number (50); |
08b610e4 | 14806 | |
7ee72033 MB |
14807 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, |
14808 | doc: /* Functions called before redisplay, if window sizes have changed. | |
228299fa GM |
14809 | The value should be a list of functions that take one argument. |
14810 | Just before redisplay, for each frame, if any of its windows have changed | |
14811 | size since the last redisplay, or have been split or deleted, | |
14812 | all the functions in the list are called, with the frame as argument. */); | |
08b610e4 | 14813 | Vwindow_size_change_functions = Qnil; |
75c43375 | 14814 | |
7ee72033 MB |
14815 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, |
14816 | doc: /* List of Functions to call before redisplaying a window with scrolling. | |
228299fa GM |
14817 | Each function is called with two arguments, the window |
14818 | and its new display-start position. Note that the value of `window-end' | |
14819 | is not valid when these functions are called. */); | |
75c43375 | 14820 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 14821 | |
7ee72033 MB |
14822 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
14823 | doc: /* *Non-nil means automatically resize tool-bars. | |
228299fa GM |
14824 | This increases a tool-bar's height if not all tool-bar items are visible. |
14825 | It decreases a tool-bar's height when it would display blank lines | |
14826 | otherwise. */); | |
e037b9ec | 14827 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 14828 | |
7ee72033 MB |
14829 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
14830 | doc: /* *Non-nil means raise tool-bar buttons when the mouse moves over them. */); | |
e037b9ec | 14831 | auto_raise_tool_bar_buttons_p = 1; |
5f5c8ee5 | 14832 | |
7ee72033 MB |
14833 | DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin, |
14834 | doc: /* *Margin around tool-bar buttons in pixels. | |
228299fa GM |
14835 | If an integer, use that for both horizontal and vertical margins. |
14836 | Otherwise, value should be a pair of integers `(HORZ : VERT)' with | |
14837 | HORZ specifying the horizontal margin, and VERT specifying the | |
14838 | vertical margin. */); | |
c3d76173 | 14839 | Vtool_bar_button_margin = make_number (DEFAULT_TOOL_BAR_BUTTON_MARGIN); |
5f5c8ee5 | 14840 | |
7ee72033 MB |
14841 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
14842 | doc: /* Relief thickness of tool-bar buttons. */); | |
c3d76173 | 14843 | tool_bar_button_relief = DEFAULT_TOOL_BAR_BUTTON_RELIEF; |
5f5c8ee5 | 14844 | |
7ee72033 MB |
14845 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, |
14846 | doc: /* List of functions to call to fontify regions of text. | |
228299fa GM |
14847 | Each function is called with one argument POS. Functions must |
14848 | fontify a region starting at POS in the current buffer, and give | |
14849 | fontified regions the property `fontified'. */); | |
5f5c8ee5 | 14850 | Vfontification_functions = Qnil; |
6b9f0906 | 14851 | Fmake_variable_buffer_local (Qfontification_functions); |
7bbe686f AI |
14852 | |
14853 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
7ee72033 MB |
14854 | &unibyte_display_via_language_environment, |
14855 | doc: /* *Non-nil means display unibyte text according to language environment. | |
228299fa GM |
14856 | Specifically this means that unibyte non-ASCII characters |
14857 | are displayed by converting them to the equivalent multibyte characters | |
14858 | according to the current language environment. As a result, they are | |
14859 | displayed according to the current fontset. */); | |
7bbe686f | 14860 | unibyte_display_via_language_environment = 0; |
c6e89d6c | 14861 | |
7ee72033 MB |
14862 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, |
14863 | doc: /* *Maximum height for resizing mini-windows. | |
228299fa GM |
14864 | If a float, it specifies a fraction of the mini-window frame's height. |
14865 | If an integer, it specifies a number of lines. */); | |
c6e89d6c | 14866 | Vmax_mini_window_height = make_float (0.25); |
6422c1d7 | 14867 | |
7ee72033 MB |
14868 | DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows, |
14869 | doc: /* *How to resize mini-windows. | |
228299fa GM |
14870 | A value of nil means don't automatically resize mini-windows. |
14871 | A value of t means resize them to fit the text displayed in them. | |
14872 | A value of `grow-only', the default, means let mini-windows grow | |
14873 | only, until their display becomes empty, at which point the windows | |
14874 | go back to their normal size. */); | |
6422c1d7 GM |
14875 | Vresize_mini_windows = Qgrow_only; |
14876 | ||
d6d26ed3 | 14877 | DEFVAR_BOOL ("cursor-in-non-selected-windows", |
7ee72033 MB |
14878 | &cursor_in_non_selected_windows, |
14879 | doc: /* *Non-nil means display a hollow cursor in non-selected windows. | |
228299fa | 14880 | Nil means don't display a cursor there. */); |
d6d26ed3 | 14881 | cursor_in_non_selected_windows = 1; |
d475bcb8 | 14882 | |
7ee72033 MB |
14883 | DEFVAR_BOOL ("automatic-hscrolling", &automatic_hscrolling_p, |
14884 | doc: /* *Non-nil means scroll the display automatically to make point visible. */); | |
d475bcb8 | 14885 | automatic_hscrolling_p = 1; |
e00daaa0 | 14886 | |
7ee72033 MB |
14887 | DEFVAR_LISP ("image-types", &Vimage_types, |
14888 | doc: /* List of supported image types. | |
228299fa | 14889 | Each element of the list is a symbol for a supported image type. */); |
e00daaa0 | 14890 | Vimage_types = Qnil; |
ad4f174e | 14891 | |
7ee72033 MB |
14892 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, |
14893 | doc: /* If non-nil, messages are truncated instead of resizing the echo area. | |
228299fa | 14894 | Bind this around calls to `message' to let it take effect. */); |
ad4f174e | 14895 | message_truncate_lines = 0; |
0bca8940 | 14896 | |
7ee72033 MB |
14897 | DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook, |
14898 | doc: /* Normal hook run for clicks on menu bar, before displaying a submenu. | |
228299fa | 14899 | Can be used to update submenus whose contents should vary. */); |
6422c1d7 | 14900 | Vmenu_bar_update_hook = Qnil; |
e1477f43 | 14901 | |
7ee72033 MB |
14902 | DEFVAR_BOOL ("inhibit-menubar-update", &inhibit_menubar_update, |
14903 | doc: /* Non-nil means don't update menu bars. Internal use only. */); | |
e1477f43 | 14904 | inhibit_menubar_update = 0; |
30a3f61c | 14905 | |
7ee72033 MB |
14906 | DEFVAR_BOOL ("inhibit-eval-during-redisplay", &inhibit_eval_during_redisplay, |
14907 | doc: /* Non-nil means don't eval Lisp during redisplay. */); | |
30a3f61c | 14908 | inhibit_eval_during_redisplay = 0; |
76cb5e06 | 14909 | |
69d1f7c9 | 14910 | #if GLYPH_DEBUG |
76cb5e06 GM |
14911 | DEFVAR_BOOL ("inhibit-try-window-id", &inhibit_try_window_id, |
14912 | doc: /* Inhibit try_window_id display optimization. */); | |
14913 | inhibit_try_window_id = 0; | |
14914 | ||
14915 | DEFVAR_BOOL ("inhibit-try-window-reusing", &inhibit_try_window_reusing, | |
14916 | doc: /* Inhibit try_window_reusing display optimization. */); | |
14917 | inhibit_try_window_reusing = 0; | |
14918 | ||
14919 | DEFVAR_BOOL ("inhibit-try-cursor-movement", &inhibit_try_cursor_movement, | |
14920 | doc: /* Inhibit try_cursor_movement display optimization. */); | |
14921 | inhibit_try_cursor_movement = 0; | |
14922 | #endif /* GLYPH_DEBUG */ | |
a2889657 JB |
14923 | } |
14924 | ||
5f5c8ee5 GM |
14925 | |
14926 | /* Initialize this module when Emacs starts. */ | |
14927 | ||
dfcf069d | 14928 | void |
a2889657 JB |
14929 | init_xdisp () |
14930 | { | |
14931 | Lisp_Object root_window; | |
5f5c8ee5 | 14932 | struct window *mini_w; |
a2889657 | 14933 | |
04612a64 GM |
14934 | current_header_line_height = current_mode_line_height = -1; |
14935 | ||
5f5c8ee5 | 14936 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
14937 | |
14938 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 14939 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 14940 | |
a2889657 JB |
14941 | if (!noninteractive) |
14942 | { | |
5f5c8ee5 GM |
14943 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
14944 | int i; | |
14945 | ||
ac90c44f | 14946 | XWINDOW (root_window)->top = make_number (FRAME_TOP_MARGIN (f)); |
12c226c5 | 14947 | set_window_height (root_window, |
5f5c8ee5 | 14948 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 14949 | 0); |
ac90c44f | 14950 | mini_w->top = make_number (FRAME_HEIGHT (f) - 1); |
a2889657 JB |
14951 | set_window_height (minibuf_window, 1, 0); |
14952 | ||
ac90c44f GM |
14953 | XWINDOW (root_window)->width = make_number (FRAME_WIDTH (f)); |
14954 | mini_w->width = make_number (FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
14955 | |
14956 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
14957 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
14958 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
14959 | ||
14960 | /* The default ellipsis glyphs `...'. */ | |
14961 | for (i = 0; i < 3; ++i) | |
ac90c44f | 14962 | default_invis_vector[i] = make_number ('.'); |
a2889657 | 14963 | } |
5f5c8ee5 GM |
14964 | |
14965 | #ifdef HAVE_WINDOW_SYSTEM | |
14966 | { | |
14967 | /* Allocate the buffer for frame titles. */ | |
14968 | int size = 100; | |
14969 | frame_title_buf = (char *) xmalloc (size); | |
14970 | frame_title_buf_end = frame_title_buf + size; | |
14971 | frame_title_ptr = NULL; | |
14972 | } | |
14973 | #endif /* HAVE_WINDOW_SYSTEM */ | |
21fdfb65 GM |
14974 | |
14975 | help_echo_showing_p = 0; | |
a2889657 | 14976 | } |
5f5c8ee5 GM |
14977 | |
14978 |