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a2889657 | 1 | /* Display generation from window structure and buffer text. |
5f5c8ee5 GM |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99 |
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, | |
36 | let's say almost---see the the description of direct update | |
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 | ||
91 | You will find a lot of of redisplay optimizations when you start | |
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 | ||
126 | Iteration over things to be be displayed is then simple. It is | |
127 | started by initializing an iterator with a call to init_iterator | |
128 | (or init_string_iterator for that matter). Calls to | |
129 | get_next_display_element fill the iterator structure with relevant | |
130 | information about the next thing to display. Calls to | |
131 | set_iterator_to_next move the iterator to the next thing. | |
132 | ||
133 | Besides this, an iterator also contains information about the | |
134 | display environment in which glyphs for display elements are to be | |
135 | produced. It has fields for the width and height of the display, | |
136 | the information whether long lines are truncated or continued, a | |
137 | current X and Y position, and lots of other stuff you can better | |
138 | see in dispextern.h. | |
139 | ||
140 | Glyphs in a desired matrix are normally constructed in a loop | |
141 | calling get_next_display_element and then produce_glyphs. The call | |
142 | to produce_glyphs will fill the iterator structure with pixel | |
143 | information about the element being displayed and at the same time | |
144 | produce glyphs for it. If the display element fits on the line | |
145 | being displayed, set_iterator_to_next is called next, otherwise the | |
146 | glyphs produced are discarded. | |
147 | ||
148 | ||
149 | Frame matrices. | |
150 | ||
151 | That just couldn't be all, could it? What about terminal types not | |
152 | supporting operations on sub-windows of the screen? To update the | |
153 | display on such a terminal, window-based glyph matrices are not | |
154 | well suited. To be able to reuse part of the display (scrolling | |
155 | lines up and down), we must instead have a view of the whole | |
156 | screen. This is what `frame matrices' are for. They are a trick. | |
157 | ||
158 | Frames on terminals like above have a glyph pool. Windows on such | |
159 | a frame sub-allocate their glyph memory from their frame's glyph | |
160 | pool. The frame itself is given its own glyph matrices. By | |
161 | coincidence---or maybe something else---rows in window glyph | |
162 | matrices are slices of corresponding rows in frame matrices. Thus | |
163 | writing to window matrices implicitly updates a frame matrix which | |
164 | provides us with the view of the whole screen that we originally | |
165 | wanted to have without having to move many bytes around. To be | |
166 | honest, there is a little bit more done, but not much more. If you | |
167 | plan to extend that code, take a look at dispnew.c. The function | |
168 | build_frame_matrix is a good starting point. */ | |
a2889657 | 169 | |
18160b98 | 170 | #include <config.h> |
a2889657 | 171 | #include <stdio.h> |
5f5c8ee5 GM |
172 | #ifdef STDC_HEADERS |
173 | #include <stdlib.h> | |
174 | #endif | |
a2889657 | 175 | #include "lisp.h" |
44fa5b1e | 176 | #include "frame.h" |
a2889657 JB |
177 | #include "window.h" |
178 | #include "termchar.h" | |
179 | #include "dispextern.h" | |
180 | #include "buffer.h" | |
1c9241f5 | 181 | #include "charset.h" |
a2889657 JB |
182 | #include "indent.h" |
183 | #include "commands.h" | |
184 | #include "macros.h" | |
185 | #include "disptab.h" | |
30c566e4 | 186 | #include "termhooks.h" |
b0a0fbda | 187 | #include "intervals.h" |
fe8b0cf8 | 188 | #include "keyboard.h" |
1c9241f5 KH |
189 | #include "coding.h" |
190 | #include "process.h" | |
dfcf069d AS |
191 | #include "region-cache.h" |
192 | ||
6d55d620 | 193 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
194 | #include "xterm.h" |
195 | #endif | |
a2889657 | 196 | |
5f5c8ee5 GM |
197 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
198 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
199 | ||
200 | #define INFINITY 10000000 | |
201 | ||
8f3343d0 | 202 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
76412d64 | 203 | extern void set_frame_menubar (); |
cd6dfed6 | 204 | extern int pending_menu_activation; |
76412d64 RS |
205 | #endif |
206 | ||
a2889657 JB |
207 | extern int interrupt_input; |
208 | extern int command_loop_level; | |
209 | ||
b6436d4e RS |
210 | extern int minibuffer_auto_raise; |
211 | ||
c4628384 RS |
212 | extern Lisp_Object Qface; |
213 | ||
399164b4 KH |
214 | extern Lisp_Object Voverriding_local_map; |
215 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 216 | extern Lisp_Object Qmenu_item; |
399164b4 | 217 | |
d46fb96a | 218 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 219 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 220 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 221 | Lisp_Object Qinhibit_point_motion_hooks; |
5f5c8ee5 GM |
222 | Lisp_Object QCeval, QCwhen; |
223 | Lisp_Object Qfontified; | |
224 | ||
225 | /* Functions called to fontify regions of text. */ | |
226 | ||
227 | Lisp_Object Vfontification_functions; | |
228 | Lisp_Object Qfontification_functions; | |
229 | ||
230 | /* Non-zero means draw toolbar buttons raised when the mouse moves | |
231 | over them. */ | |
232 | ||
233 | int auto_raise_toolbar_buttons_p; | |
234 | ||
235 | /* Margin around toolbar buttons in pixels. */ | |
236 | ||
237 | int toolbar_button_margin; | |
238 | ||
239 | /* Thickness of shadow to draw around toolbar buttons. */ | |
240 | ||
241 | int toolbar_button_relief; | |
242 | ||
243 | /* Non-zero means automatically resize toolbars so that all toolbar | |
244 | items are visible, and no blank lines remain. */ | |
245 | ||
246 | int auto_resize_toolbars_p; | |
399164b4 | 247 | |
735c094c KH |
248 | /* Non-nil means don't actually do any redisplay. */ |
249 | ||
250 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
251 | ||
5f5c8ee5 GM |
252 | /* Names of text properties relevant for redisplay. */ |
253 | ||
254 | Lisp_Object Qdisplay, Qrelative_width, Qwidth, Qalign_to; | |
255 | extern Lisp_Object Qface, Qinvisible, Qimage; | |
256 | ||
257 | /* Symbols used in text property values. */ | |
258 | ||
259 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
260 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qheight, Qraise; | |
261 | ||
262 | /* Name of the variable controlling the highlighting of trailing | |
263 | whitespace. The implementation uses find_symbol_value to get its | |
264 | value. */ | |
265 | ||
266 | Lisp_Object Qshow_trailing_whitespace; | |
267 | ||
268 | /* Name of the face used to highlight trailing whitespace. */ | |
269 | ||
270 | Lisp_Object Qtrailing_whitespace; | |
271 | ||
272 | /* The symbol `image' which is the car of the lists used to represent | |
273 | images in Lisp. */ | |
274 | ||
275 | Lisp_Object Qimage; | |
276 | ||
277 | /* Non-zero means print newline to stdout before next mini-buffer | |
278 | message. */ | |
a2889657 JB |
279 | |
280 | int noninteractive_need_newline; | |
281 | ||
5f5c8ee5 | 282 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 283 | |
3c6595e0 | 284 | static int message_log_need_newline; |
f88eb0b6 | 285 | |
5f5c8ee5 GM |
286 | \f |
287 | /* The buffer position of the first character appearing entirely or | |
288 | partially on the line of the selected window which contains the | |
289 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
290 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 291 | |
5f5c8ee5 | 292 | static struct text_pos this_line_start_pos; |
a2889657 | 293 | |
5f5c8ee5 GM |
294 | /* Number of characters past the end of the line above, including the |
295 | terminating newline. */ | |
296 | ||
297 | static struct text_pos this_line_end_pos; | |
298 | ||
299 | /* The vertical positions and the height of this line. */ | |
a2889657 | 300 | |
a2889657 | 301 | static int this_line_vpos; |
5f5c8ee5 GM |
302 | static int this_line_y; |
303 | static int this_line_pixel_height; | |
304 | ||
305 | /* X position at which this display line starts. Usually zero; | |
306 | negative if first character is partially visible. */ | |
307 | ||
308 | static int this_line_start_x; | |
a2889657 | 309 | |
5f5c8ee5 | 310 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 311 | |
a2889657 JB |
312 | static struct buffer *this_line_buffer; |
313 | ||
5f5c8ee5 GM |
314 | /* Nonzero means truncate lines in all windows less wide than the |
315 | frame. */ | |
a2889657 | 316 | |
a2889657 JB |
317 | int truncate_partial_width_windows; |
318 | ||
7bbe686f | 319 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 320 | |
7bbe686f | 321 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
322 | |
323 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
324 | Not guaranteed to be accurate except while parsing | |
325 | frame-title-format. */ | |
7bbe686f | 326 | |
d39b6696 KH |
327 | int multiple_frames; |
328 | ||
a2889657 JB |
329 | Lisp_Object Vglobal_mode_string; |
330 | ||
331 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 332 | |
a2889657 JB |
333 | Lisp_Object Voverlay_arrow_position; |
334 | ||
5f5c8ee5 GM |
335 | /* String to display for the arrow. Only used on terminal frames. */ |
336 | ||
a2889657 JB |
337 | Lisp_Object Voverlay_arrow_string; |
338 | ||
5f5c8ee5 GM |
339 | /* Values of those variables at last redisplay. However, if |
340 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
341 | numerical position. */ | |
342 | ||
d45de95b RS |
343 | static Lisp_Object last_arrow_position, last_arrow_string; |
344 | ||
5f5c8ee5 GM |
345 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
346 | ||
d39b6696 KH |
347 | Lisp_Object Vframe_title_format; |
348 | ||
5f5c8ee5 GM |
349 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
350 | ||
d39b6696 KH |
351 | Lisp_Object Vicon_title_format; |
352 | ||
08b610e4 RS |
353 | /* List of functions to call when a window's size changes. These |
354 | functions get one arg, a frame on which one or more windows' sizes | |
355 | have changed. */ | |
5f5c8ee5 | 356 | |
08b610e4 RS |
357 | static Lisp_Object Vwindow_size_change_functions; |
358 | ||
cf074754 RS |
359 | Lisp_Object Qmenu_bar_update_hook; |
360 | ||
a2889657 | 361 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 362 | |
5f5c8ee5 | 363 | static int overlay_arrow_seen; |
ca26e1c8 | 364 | |
fba9ce76 | 365 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 366 | |
5f5c8ee5 GM |
367 | int highlight_nonselected_windows; |
368 | ||
369 | /* If cursor motion alone moves point off frame, try scrolling this | |
370 | many lines up or down if that will bring it back. */ | |
371 | ||
14510fee | 372 | static int scroll_step; |
a2889657 | 373 | |
5f5c8ee5 GM |
374 | /* Non-0 means scroll just far enough to bring point back on the |
375 | screen, when appropriate. */ | |
376 | ||
0789adb2 RS |
377 | static int scroll_conservatively; |
378 | ||
5f5c8ee5 GM |
379 | /* Recenter the window whenever point gets within this many lines of |
380 | the top or bottom of the window. This value is translated into a | |
381 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
382 | there is really a fixed pixel height scroll margin. */ | |
383 | ||
9afd2168 RS |
384 | int scroll_margin; |
385 | ||
5f5c8ee5 GM |
386 | /* Number of characters of overlap to show, when scrolling a one-line |
387 | window such as a minibuffer. */ | |
388 | ||
010494d0 KH |
389 | static int minibuffer_scroll_overlap; |
390 | ||
5f5c8ee5 GM |
391 | /* Number of windows showing the buffer of the selected window (or |
392 | another buffer with the same base buffer). keyboard.c refers to | |
393 | this. */ | |
a2889657 | 394 | |
a2889657 JB |
395 | int buffer_shared; |
396 | ||
5f5c8ee5 | 397 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 398 | |
5f5c8ee5 | 399 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 400 | |
5f5c8ee5 | 401 | /* Nonzero means display mode line highlighted. */ |
a2889657 | 402 | |
a2889657 JB |
403 | int mode_line_inverse_video; |
404 | ||
5f5c8ee5 GM |
405 | /* Prompt to display in front of the mini-buffer contents. */ |
406 | ||
8c5b6a0a | 407 | Lisp_Object minibuf_prompt; |
a2889657 | 408 | |
5f5c8ee5 GM |
409 | /* Width of current mini-buffer prompt. Only set after display_line |
410 | of the line that contains the prompt. */ | |
411 | ||
a2889657 | 412 | int minibuf_prompt_width; |
5f5c8ee5 GM |
413 | int minibuf_prompt_pixel_width; |
414 | ||
415 | /* Message to display instead of mini-buffer contents. This is what | |
416 | the functions error and message make, and command echoing uses it | |
417 | as well. It overrides the minibuf_prompt as well as the buffer. */ | |
a2889657 | 418 | |
a2889657 JB |
419 | char *echo_area_glyphs; |
420 | ||
5f5c8ee5 GM |
421 | /* A Lisp string to display instead of mini-buffer contents, analogous |
422 | to echo_area_glyphs. If this is a string, display that string. | |
423 | Otherwise, if echo_area_glyphs is non-null, display that. */ | |
424 | ||
425 | Lisp_Object echo_area_message; | |
426 | ||
427 | /* This is the length of the message in echo_area_glyphs or | |
428 | echo_area_message. */ | |
429 | ||
90adcf20 RS |
430 | int echo_area_glyphs_length; |
431 | ||
5f5c8ee5 GM |
432 | /* Value of echo_area_glyphs when it was last acted on. If this is |
433 | nonzero, there is a message on the frame in the mini-buffer and it | |
434 | should be erased as soon as it is no longer requested to appear. */ | |
435 | ||
436 | char *previous_echo_glyphs; | |
437 | Lisp_Object previous_echo_area_message; | |
438 | static int previous_echo_glyphs_length; | |
439 | ||
440 | /* This is the window where the echo area message was displayed. It | |
441 | is always a mini-buffer window, but it may not be the same window | |
442 | currently active as a mini-buffer. */ | |
443 | ||
73af359d RS |
444 | Lisp_Object echo_area_window; |
445 | ||
a3788d53 RS |
446 | /* Nonzero means multibyte characters were enabled when the echo area |
447 | message was specified. */ | |
5f5c8ee5 | 448 | |
a3788d53 RS |
449 | int message_enable_multibyte; |
450 | ||
5f5c8ee5 GM |
451 | /* True if we should redraw the mode lines on the next redisplay. */ |
452 | ||
a2889657 JB |
453 | int update_mode_lines; |
454 | ||
5f5c8ee5 GM |
455 | /* Smallest number of characters before the gap at any time since last |
456 | redisplay that finished. Valid for current buffer when | |
457 | try_window_id can be called. */ | |
458 | ||
a2889657 JB |
459 | int beg_unchanged; |
460 | ||
5f5c8ee5 GM |
461 | /* Smallest number of characters after the gap at any time since last |
462 | redisplay that finished. Valid for current buffer when | |
463 | try_window_id can be called. */ | |
464 | ||
a2889657 JB |
465 | int end_unchanged; |
466 | ||
5f5c8ee5 GM |
467 | /* MODIFF as of last redisplay that finished; if it matches MODIFF, |
468 | and overlay_unchanged_modified matches OVERLAY_MODIFF, that means | |
469 | beg_unchanged and end_unchanged contain no useful information. */ | |
470 | ||
a2889657 JB |
471 | int unchanged_modified; |
472 | ||
8850a573 | 473 | /* OVERLAY_MODIFF as of last redisplay that finished. */ |
5f5c8ee5 | 474 | |
8850a573 RS |
475 | int overlay_unchanged_modified; |
476 | ||
5f5c8ee5 GM |
477 | /* Nonzero if window sizes or contents have changed since last |
478 | redisplay that finished */ | |
479 | ||
a2889657 JB |
480 | int windows_or_buffers_changed; |
481 | ||
5f5c8ee5 GM |
482 | /* Nonzero after display_mode_line if %l was used and it displayed a |
483 | line number. */ | |
484 | ||
aa6d10fa RS |
485 | int line_number_displayed; |
486 | ||
487 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 488 | |
14510fee | 489 | static int line_number_display_limit; |
5992c4f7 | 490 | |
5d121aec KH |
491 | /* line width to consider when repostioning for line number display */ |
492 | ||
493 | static int line_number_display_limit_width; | |
494 | ||
5f5c8ee5 GM |
495 | /* Number of lines to keep in the message log buffer. t means |
496 | infinite. nil means don't log at all. */ | |
497 | ||
5992c4f7 | 498 | Lisp_Object Vmessage_log_max; |
d45de95b | 499 | |
5f5c8ee5 GM |
500 | /* A scratch glyph row with contents used for generating truncation |
501 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 502 | |
5f5c8ee5 GM |
503 | #define MAX_SCRATCH_GLYPHS 100 |
504 | struct glyph_row scratch_glyph_row; | |
505 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 506 | |
5f5c8ee5 GM |
507 | /* Ascent and height of the last line processed by move_it_to. */ |
508 | ||
509 | static int last_max_ascent, last_height; | |
510 | ||
511 | /* The maximum distance to look ahead for text properties. Values | |
512 | that are too small let us call compute_char_face and similar | |
513 | functions too often which is expensive. Values that are too large | |
514 | let us call compute_char_face and alike too often because we | |
515 | might not be interested in text properties that far away. */ | |
516 | ||
517 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
518 | ||
519 | /* Non-zero means print traces of redisplay if compiled with | |
520 | GLYPH_DEBUG != 0. */ | |
521 | ||
522 | #if GLYPH_DEBUG | |
523 | int trace_redisplay_p; | |
524 | #endif | |
525 | ||
526 | /* Value returned from text property handlers (see below). */ | |
527 | ||
528 | enum prop_handled | |
3c6595e0 | 529 | { |
5f5c8ee5 GM |
530 | HANDLED_NORMALLY, |
531 | HANDLED_RECOMPUTE_PROPS, | |
532 | HANDLED_OVERLAY_STRING_CONSUMED, | |
533 | HANDLED_RETURN | |
534 | }; | |
3c6595e0 | 535 | |
5f5c8ee5 GM |
536 | /* A description of text properties that redisplay is interested |
537 | in. */ | |
3c6595e0 | 538 | |
5f5c8ee5 GM |
539 | struct props |
540 | { | |
541 | /* The name of the property. */ | |
542 | Lisp_Object *name; | |
90adcf20 | 543 | |
5f5c8ee5 GM |
544 | /* A unique index for the property. */ |
545 | enum prop_idx idx; | |
546 | ||
547 | /* A handler function called to set up iterator IT from the property | |
548 | at IT's current position. Value is used to steer handle_stop. */ | |
549 | enum prop_handled (*handler) P_ ((struct it *it)); | |
550 | }; | |
551 | ||
552 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
553 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
554 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
555 | static enum prop_handled handle_overlay_change P_ ((struct it *)); | |
556 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
557 | ||
558 | /* Properties handled by iterators. */ | |
559 | ||
560 | static struct props it_props[] = | |
5992c4f7 | 561 | { |
5f5c8ee5 GM |
562 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
563 | /* Handle `face' before `display' because some sub-properties of | |
564 | `display' need to know the face. */ | |
565 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
566 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
567 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
568 | {NULL, 0, NULL} | |
569 | }; | |
5992c4f7 | 570 | |
5f5c8ee5 GM |
571 | /* Value is the position described by X. If X is a marker, value is |
572 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 573 | |
5f5c8ee5 | 574 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 575 | |
5f5c8ee5 | 576 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 577 | |
5f5c8ee5 GM |
578 | enum move_it_result |
579 | { | |
580 | /* Not used. Undefined value. */ | |
581 | MOVE_UNDEFINED, | |
bab29e15 | 582 | |
5f5c8ee5 GM |
583 | /* Move ended at the requested buffer position or ZV. */ |
584 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 585 | |
5f5c8ee5 GM |
586 | /* Move ended at the requested X pixel position. */ |
587 | MOVE_X_REACHED, | |
12adba34 | 588 | |
5f5c8ee5 GM |
589 | /* Move within a line ended at the end of a line that must be |
590 | continued. */ | |
591 | MOVE_LINE_CONTINUED, | |
592 | ||
593 | /* Move within a line ended at the end of a line that would | |
594 | be displayed truncated. */ | |
595 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 596 | |
5f5c8ee5 GM |
597 | /* Move within a line ended at a line end. */ |
598 | MOVE_NEWLINE_OR_CR | |
599 | }; | |
12adba34 | 600 | |
ff6c30e5 | 601 | |
5f5c8ee5 GM |
602 | \f |
603 | /* Function prototypes. */ | |
604 | ||
4fdb80f2 | 605 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
606 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
607 | struct text_pos)); | |
608 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
609 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
610 | static Lisp_Object eval_form P_ ((Lisp_Object)); | |
611 | static void insert_left_trunc_glyphs P_ ((struct it *)); | |
612 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
613 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
614 | static void append_space P_ ((struct it *, int)); | |
615 | static void make_cursor_line_fully_visible P_ ((struct window *)); | |
616 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
617 | static int trailing_whitespace_p P_ ((int)); | |
618 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
619 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
620 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
621 | static void push_it P_ ((struct it *)); | |
622 | static void pop_it P_ ((struct it *)); | |
623 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
624 | static void redisplay_internal P_ ((int)); | |
625 | static void echo_area_display P_ ((int)); | |
626 | static void redisplay_windows P_ ((Lisp_Object)); | |
627 | static void redisplay_window P_ ((Lisp_Object, int)); | |
628 | static void update_menu_bar P_ ((struct frame *, int)); | |
629 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
630 | static int try_window_id P_ ((struct window *)); | |
631 | static int display_line P_ ((struct it *)); | |
632 | static void display_mode_lines P_ ((struct window *)); | |
633 | static void display_mode_line P_ ((struct window *, enum face_id, | |
634 | Lisp_Object)); | |
635 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
636 | static char *decode_mode_spec P_ ((struct window *, char, int, int)); | |
637 | static void display_menu_bar P_ ((struct window *)); | |
638 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
639 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
640 | int, int, struct it *, int, int, int, int)); | |
641 | static void compute_line_metrics P_ ((struct it *)); | |
642 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
643 | static int get_overlay_strings P_ ((struct it *)); | |
644 | static void next_overlay_string P_ ((struct it *)); | |
645 | void set_iterator_to_next P_ ((struct it *)); | |
646 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
647 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
648 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
649 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 650 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
651 | static int next_element_from_display_vector P_ ((struct it *)); |
652 | static int next_element_from_string P_ ((struct it *)); | |
653 | static int next_element_from_c_string P_ ((struct it *)); | |
654 | static int next_element_from_buffer P_ ((struct it *)); | |
655 | static int next_element_from_image P_ ((struct it *)); | |
656 | static int next_element_from_stretch P_ ((struct it *)); | |
657 | static void load_overlay_strings P_ ((struct it *)); | |
658 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
659 | struct display_pos *)); | |
660 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
661 | Lisp_Object, int, int, int, int)); | |
662 | static int charset_at_position P_ ((struct text_pos)); | |
663 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, | |
664 | int, int, int)); | |
665 | void move_it_vertically_backward P_ ((struct it *, int)); | |
666 | static void init_to_row_start P_ ((struct it *, struct window *, | |
667 | struct glyph_row *)); | |
668 | static void init_to_row_end P_ ((struct it *, struct window *, | |
669 | struct glyph_row *)); | |
670 | static void back_to_previous_line_start P_ ((struct it *)); | |
671 | static void forward_to_next_line_start P_ ((struct it *)); | |
672 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
673 | Lisp_Object, int)); | |
674 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
675 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
676 | static int number_of_chars P_ ((unsigned char *, int)); | |
677 | static void compute_stop_pos P_ ((struct it *)); | |
678 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
679 | Lisp_Object)); | |
680 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
681 | static int next_overlay_change P_ ((int)); | |
682 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
683 | Lisp_Object, struct text_pos *)); | |
684 | ||
685 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
686 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 687 | |
5f5c8ee5 | 688 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 689 | |
5f5c8ee5 GM |
690 | static void update_toolbar P_ ((struct frame *, int)); |
691 | static void build_desired_toolbar_string P_ ((struct frame *f)); | |
692 | static int redisplay_toolbar P_ ((struct frame *)); | |
693 | static void display_toolbar_line P_ ((struct it *)); | |
12adba34 | 694 | |
5f5c8ee5 | 695 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 696 | |
5f5c8ee5 GM |
697 | \f |
698 | /*********************************************************************** | |
699 | Window display dimensions | |
700 | ***********************************************************************/ | |
12adba34 | 701 | |
5f5c8ee5 GM |
702 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
703 | text in window W. This is the height of W minus the height of a | |
704 | mode line, if any. */ | |
705 | ||
706 | INLINE int | |
707 | window_text_bottom_y (w) | |
708 | struct window *w; | |
709 | { | |
710 | struct frame *f = XFRAME (w->frame); | |
711 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
712 | ||
713 | if (WINDOW_WANTS_MODELINE_P (w)) | |
714 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
715 | return height; | |
f88eb0b6 KH |
716 | } |
717 | ||
f82aff7c | 718 | |
5f5c8ee5 GM |
719 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
720 | means return the total width of W, not including bitmap areas to | |
721 | the left and right of the window. */ | |
ff6c30e5 | 722 | |
5f5c8ee5 GM |
723 | INLINE int |
724 | window_box_width (w, area) | |
725 | struct window *w; | |
726 | int area; | |
727 | { | |
728 | struct frame *f = XFRAME (w->frame); | |
729 | int width = XFASTINT (w->width); | |
730 | ||
731 | if (!w->pseudo_window_p) | |
ff6c30e5 | 732 | { |
5f5c8ee5 GM |
733 | width -= FRAME_SCROLL_BAR_WIDTH (f) + 2 * FRAME_FLAGS_AREA_COLS (f); |
734 | ||
735 | if (area == TEXT_AREA) | |
736 | { | |
737 | if (INTEGERP (w->left_margin_width)) | |
738 | width -= XFASTINT (w->left_margin_width); | |
739 | if (INTEGERP (w->right_margin_width)) | |
740 | width -= XFASTINT (w->right_margin_width); | |
741 | } | |
742 | else if (area == LEFT_MARGIN_AREA) | |
743 | width = (INTEGERP (w->left_margin_width) | |
744 | ? XFASTINT (w->left_margin_width) : 0); | |
745 | else if (area == RIGHT_MARGIN_AREA) | |
746 | width = (INTEGERP (w->right_margin_width) | |
747 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 748 | } |
5f5c8ee5 GM |
749 | |
750 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 751 | } |
1adc55de | 752 | |
1adc55de | 753 | |
5f5c8ee5 GM |
754 | /* Return the pixel height of the display area of window W, not |
755 | including mode lines of W, if any.. */ | |
f88eb0b6 | 756 | |
5f5c8ee5 GM |
757 | INLINE int |
758 | window_box_height (w) | |
759 | struct window *w; | |
f88eb0b6 | 760 | { |
5f5c8ee5 GM |
761 | struct frame *f = XFRAME (w->frame); |
762 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
763 | ||
764 | if (WINDOW_WANTS_MODELINE_P (w)) | |
765 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
766 | ||
767 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
768 | height -= CURRENT_TOP_LINE_HEIGHT (w); | |
769 | ||
770 | return height; | |
5992c4f7 KH |
771 | } |
772 | ||
773 | ||
5f5c8ee5 GM |
774 | /* Return the frame-relative coordinate of the left edge of display |
775 | area AREA of window W. AREA < 0 means return the left edge of the | |
776 | whole window, to the right of any bitmap area at the left side of | |
777 | W. */ | |
5992c4f7 | 778 | |
5f5c8ee5 GM |
779 | INLINE int |
780 | window_box_left (w, area) | |
781 | struct window *w; | |
782 | int area; | |
90adcf20 | 783 | { |
5f5c8ee5 GM |
784 | struct frame *f = XFRAME (w->frame); |
785 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 786 | |
5f5c8ee5 | 787 | if (!w->pseudo_window_p) |
90adcf20 | 788 | { |
5f5c8ee5 GM |
789 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
790 | + FRAME_FLAGS_AREA_WIDTH (f)); | |
791 | ||
792 | if (area == TEXT_AREA) | |
793 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
794 | else if (area == RIGHT_MARGIN_AREA) | |
795 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
796 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 797 | } |
73af359d | 798 | |
5f5c8ee5 GM |
799 | return x; |
800 | } | |
90adcf20 | 801 | |
b6436d4e | 802 | |
5f5c8ee5 GM |
803 | /* Return the frame-relative coordinate of the right edge of display |
804 | area AREA of window W. AREA < 0 means return the left edge of the | |
805 | whole window, to the left of any bitmap area at the right side of | |
806 | W. */ | |
ded34426 | 807 | |
5f5c8ee5 GM |
808 | INLINE int |
809 | window_box_right (w, area) | |
810 | struct window *w; | |
811 | int area; | |
812 | { | |
813 | return window_box_left (w, area) + window_box_width (w, area); | |
814 | } | |
815 | ||
816 | ||
817 | /* Get the bounding box of the display area AREA of window W, without | |
818 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
819 | whole window, not including bitmap areas to the left and right of | |
820 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
821 | coordinates of the upper-left corner of the box. Return in | |
822 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
823 | ||
824 | INLINE void | |
825 | window_box (w, area, box_x, box_y, box_width, box_height) | |
826 | struct window *w; | |
827 | int area; | |
828 | int *box_x, *box_y, *box_width, *box_height; | |
829 | { | |
830 | struct frame *f = XFRAME (w->frame); | |
831 | ||
832 | *box_width = window_box_width (w, area); | |
833 | *box_height = window_box_height (w); | |
834 | *box_x = window_box_left (w, area); | |
835 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
836 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
837 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
838 | *box_y += CURRENT_TOP_LINE_HEIGHT (w); | |
ded34426 | 839 | } |
1adc55de | 840 | |
1adc55de | 841 | |
5f5c8ee5 GM |
842 | /* Get the bounding box of the display area AREA of window W, without |
843 | mode lines. AREA < 0 means the whole window, not including bitmap | |
844 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
845 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
846 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
847 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
848 | box. */ | |
ded34426 | 849 | |
5f5c8ee5 GM |
850 | INLINE void |
851 | window_box_edges (w, area, top_left_x, top_left_y, | |
852 | bottom_right_x, bottom_right_y) | |
853 | struct window *w; | |
854 | int area; | |
855 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 856 | { |
5f5c8ee5 GM |
857 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
858 | bottom_right_y); | |
859 | *bottom_right_x += *top_left_x; | |
860 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
861 | } |
862 | ||
5f5c8ee5 GM |
863 | |
864 | \f | |
865 | /*********************************************************************** | |
866 | Utilities | |
867 | ***********************************************************************/ | |
868 | ||
4fdb80f2 GM |
869 | /* Return the next character from STR which is MAXLEN bytes long. |
870 | Return in *LEN the length of the character. This is like | |
871 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
872 | we find one, we return a `?', but with the length of the illegal | |
873 | character. */ | |
874 | ||
875 | static INLINE int | |
7a5b8a93 | 876 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 877 | unsigned char *str; |
7a5b8a93 | 878 | int maxlen, *len; |
4fdb80f2 GM |
879 | { |
880 | int c; | |
881 | ||
882 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
883 | if (!CHAR_VALID_P (c, 1)) | |
884 | /* We may not change the length here because other places in Emacs | |
885 | don't use this function, i.e. they silently accept illegal | |
886 | characters. */ | |
887 | c = '?'; | |
888 | ||
889 | return c; | |
890 | } | |
891 | ||
892 | ||
893 | ||
5f5c8ee5 GM |
894 | /* Given a position POS containing a valid character and byte position |
895 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
896 | ||
897 | static struct text_pos | |
898 | string_pos_nchars_ahead (pos, string, nchars) | |
899 | struct text_pos pos; | |
900 | Lisp_Object string; | |
901 | int nchars; | |
0b1005ef | 902 | { |
5f5c8ee5 GM |
903 | xassert (STRINGP (string) && nchars >= 0); |
904 | ||
905 | if (STRING_MULTIBYTE (string)) | |
906 | { | |
907 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
908 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
909 | int len; | |
910 | ||
911 | while (nchars--) | |
912 | { | |
4fdb80f2 | 913 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
914 | p += len, rest -= len; |
915 | xassert (rest >= 0); | |
916 | CHARPOS (pos) += 1; | |
917 | BYTEPOS (pos) += len; | |
918 | } | |
919 | } | |
920 | else | |
921 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
922 | ||
923 | return pos; | |
0a9dc68b RS |
924 | } |
925 | ||
0a9dc68b | 926 | |
5f5c8ee5 GM |
927 | /* Value is the text position, i.e. character and byte position, |
928 | for character position CHARPOS in STRING. */ | |
929 | ||
930 | static INLINE struct text_pos | |
931 | string_pos (charpos, string) | |
932 | int charpos; | |
0a9dc68b | 933 | Lisp_Object string; |
0a9dc68b | 934 | { |
5f5c8ee5 GM |
935 | struct text_pos pos; |
936 | xassert (STRINGP (string)); | |
937 | xassert (charpos >= 0); | |
938 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
939 | return pos; | |
940 | } | |
941 | ||
942 | ||
943 | /* Value is a text position, i.e. character and byte position, for | |
944 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
945 | means recognize multibyte characters. */ | |
946 | ||
947 | static struct text_pos | |
948 | c_string_pos (charpos, s, multibyte_p) | |
949 | int charpos; | |
950 | unsigned char *s; | |
951 | int multibyte_p; | |
952 | { | |
953 | struct text_pos pos; | |
954 | ||
955 | xassert (s != NULL); | |
956 | xassert (charpos >= 0); | |
957 | ||
958 | if (multibyte_p) | |
0a9dc68b | 959 | { |
5f5c8ee5 GM |
960 | int rest = strlen (s), len; |
961 | ||
962 | SET_TEXT_POS (pos, 0, 0); | |
963 | while (charpos--) | |
0a9dc68b | 964 | { |
4fdb80f2 | 965 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
966 | s += len, rest -= len; |
967 | xassert (rest >= 0); | |
968 | CHARPOS (pos) += 1; | |
969 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
970 | } |
971 | } | |
5f5c8ee5 GM |
972 | else |
973 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 974 | |
5f5c8ee5 GM |
975 | return pos; |
976 | } | |
0a9dc68b | 977 | |
0a9dc68b | 978 | |
5f5c8ee5 GM |
979 | /* Value is the number of characters in C string S. MULTIBYTE_P |
980 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 981 | |
5f5c8ee5 GM |
982 | static int |
983 | number_of_chars (s, multibyte_p) | |
984 | unsigned char *s; | |
985 | int multibyte_p; | |
986 | { | |
987 | int nchars; | |
988 | ||
989 | if (multibyte_p) | |
990 | { | |
991 | int rest = strlen (s), len; | |
992 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 993 | |
5f5c8ee5 GM |
994 | for (nchars = 0; rest > 0; ++nchars) |
995 | { | |
4fdb80f2 | 996 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 997 | rest -= len, p += len; |
0a9dc68b RS |
998 | } |
999 | } | |
5f5c8ee5 GM |
1000 | else |
1001 | nchars = strlen (s); | |
1002 | ||
1003 | return nchars; | |
0b1005ef KH |
1004 | } |
1005 | ||
5f5c8ee5 GM |
1006 | |
1007 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1008 | NEWPOS->charpos. POS is a known position in string STRING. | |
1009 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1010 | |
5f5c8ee5 GM |
1011 | static void |
1012 | compute_string_pos (newpos, pos, string) | |
1013 | struct text_pos *newpos, pos; | |
1014 | Lisp_Object string; | |
76412d64 | 1015 | { |
5f5c8ee5 GM |
1016 | xassert (STRINGP (string)); |
1017 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1018 | ||
1019 | if (STRING_MULTIBYTE (string)) | |
1020 | *newpos = string_pos_nchars_ahead (pos, CHARPOS (*newpos) - CHARPOS (pos), | |
1021 | string); | |
1022 | else | |
1023 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1024 | } |
1025 | ||
9c74a0dd | 1026 | |
5f5c8ee5 GM |
1027 | /* Return the charset of the character at position POS in |
1028 | current_buffer. */ | |
1adc55de | 1029 | |
5f5c8ee5 GM |
1030 | static int |
1031 | charset_at_position (pos) | |
1032 | struct text_pos pos; | |
a2889657 | 1033 | { |
5f5c8ee5 GM |
1034 | int c, multibyte_p; |
1035 | unsigned char *p = BYTE_POS_ADDR (BYTEPOS (pos)); | |
1036 | ||
1037 | multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1038 | if (multibyte_p) | |
a2889657 | 1039 | { |
5f5c8ee5 GM |
1040 | int maxlen = ((BYTEPOS (pos) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) |
1041 | - BYTEPOS (pos)); | |
1042 | int len; | |
4fdb80f2 | 1043 | c = string_char_and_length (p, maxlen, &len); |
a2889657 | 1044 | } |
5f5c8ee5 GM |
1045 | else |
1046 | c = *p; | |
1047 | ||
1048 | return CHAR_CHARSET (c); | |
1049 | } | |
1050 | ||
1051 | ||
1052 | \f | |
1053 | /*********************************************************************** | |
1054 | Lisp form evaluation | |
1055 | ***********************************************************************/ | |
1056 | ||
1057 | /* Error handler for eval_form. */ | |
1058 | ||
1059 | static Lisp_Object | |
1060 | eval_handler (arg) | |
1061 | Lisp_Object arg; | |
1062 | { | |
1063 | return Qnil; | |
1064 | } | |
1065 | ||
1066 | ||
1067 | /* Evaluate SEXPR and return the result, or nil if something went | |
1068 | wrong. */ | |
1069 | ||
1070 | static Lisp_Object | |
1071 | eval_form (sexpr) | |
1072 | Lisp_Object sexpr; | |
1073 | { | |
1074 | int count = specpdl_ptr - specpdl; | |
1075 | Lisp_Object val; | |
1076 | specbind (Qinhibit_redisplay, Qt); | |
1077 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
1078 | return unbind_to (count, val); | |
1079 | } | |
1080 | ||
1081 | ||
1082 | \f | |
1083 | /*********************************************************************** | |
1084 | Debugging | |
1085 | ***********************************************************************/ | |
1086 | ||
1087 | #if 0 | |
1088 | ||
1089 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1090 | This is for debugging. It is too slow to do unconditionally. */ | |
1091 | ||
1092 | static void | |
1093 | check_it (it) | |
1094 | struct it *it; | |
1095 | { | |
1096 | if (it->method == next_element_from_string) | |
a2889657 | 1097 | { |
5f5c8ee5 GM |
1098 | xassert (STRINGP (it->string)); |
1099 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1100 | } | |
1101 | else if (it->method == next_element_from_buffer) | |
1102 | { | |
1103 | /* Check that character and byte positions agree. */ | |
1104 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1105 | } | |
73af359d | 1106 | |
5f5c8ee5 GM |
1107 | if (it->dpvec) |
1108 | xassert (it->current.dpvec_index >= 0); | |
1109 | else | |
1110 | xassert (it->current.dpvec_index < 0); | |
1111 | } | |
1f40cad2 | 1112 | |
5f5c8ee5 GM |
1113 | #define CHECK_IT(IT) check_it ((IT)) |
1114 | ||
1115 | #else /* not 0 */ | |
1116 | ||
1117 | #define CHECK_IT(IT) (void) 0 | |
1118 | ||
1119 | #endif /* not 0 */ | |
1120 | ||
1121 | ||
1122 | #if GLYPH_DEBUG | |
1123 | ||
1124 | /* Check that the window end of window W is what we expect it | |
1125 | to be---the last row in the current matrix displaying text. */ | |
1126 | ||
1127 | static void | |
1128 | check_window_end (w) | |
1129 | struct window *w; | |
1130 | { | |
1131 | if (!MINI_WINDOW_P (w) | |
1132 | && !NILP (w->window_end_valid)) | |
1133 | { | |
1134 | struct glyph_row *row; | |
1135 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1136 | XFASTINT (w->window_end_vpos)), | |
1137 | !row->enabled_p | |
1138 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1139 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1144 | ||
1145 | #else /* not GLYPH_DEBUG */ | |
1146 | ||
1147 | #define CHECK_WINDOW_END(W) (void) 0 | |
1148 | ||
1149 | #endif /* not GLYPH_DEBUG */ | |
1150 | ||
1151 | ||
1152 | \f | |
1153 | /*********************************************************************** | |
1154 | Iterator initialization | |
1155 | ***********************************************************************/ | |
1156 | ||
1157 | /* Initialize IT for displaying current_buffer in window W, starting | |
1158 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1159 | position is specified which is useful when the iterator is assigned | |
1160 | a position later. BYTEPOS is the byte position corresponding to | |
1161 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1162 | ||
1163 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1164 | will produce glyphs in that row. | |
1165 | ||
1166 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1167 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
1168 | TOP_LINE_FACE_ID for displaying mode lines, or TOOLBAR_FACE_ID for | |
1169 | displaying the toolbar. | |
1170 | ||
1171 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
1172 | TOP_LINE_FACE_ID, the iterator will be initialized to use the | |
1173 | corresponding mode line glyph row of the desired matrix of W. */ | |
1174 | ||
1175 | void | |
1176 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1177 | struct it *it; | |
1178 | struct window *w; | |
1179 | int charpos, bytepos; | |
1180 | struct glyph_row *row; | |
1181 | enum face_id base_face_id; | |
1182 | { | |
1183 | int highlight_region_p; | |
1184 | Lisp_Object value; | |
1185 | ||
1186 | /* Some precondition checks. */ | |
1187 | xassert (w != NULL && it != NULL); | |
1188 | xassert (charpos < 0 || current_buffer == XBUFFER (w->buffer)); | |
1189 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); | |
1190 | ||
1191 | /* If face attributes have been changed since the last redisplay, | |
1192 | free realized faces now because they depend on face definitions | |
1193 | that might have changed. */ | |
1194 | if (face_change_count) | |
1195 | { | |
1196 | face_change_count = 0; | |
1197 | free_all_realized_faces (Qnil); | |
1198 | } | |
1199 | ||
1200 | /* Use one of the mode line rows of W's desired matrix if | |
1201 | appropriate. */ | |
1202 | if (row == NULL) | |
1203 | { | |
1204 | if (base_face_id == MODE_LINE_FACE_ID) | |
1205 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
1206 | else if (base_face_id == TOP_LINE_FACE_ID) | |
1207 | row = MATRIX_TOP_LINE_ROW (w->desired_matrix); | |
1208 | } | |
1209 | ||
1210 | /* Clear IT. */ | |
1211 | bzero (it, sizeof *it); | |
1212 | it->current.overlay_string_index = -1; | |
1213 | it->current.dpvec_index = -1; | |
1214 | it->charset = CHARSET_ASCII; | |
1215 | it->base_face_id = base_face_id; | |
1216 | ||
1217 | /* The window in which we iterate over current_buffer: */ | |
1218 | XSETWINDOW (it->window, w); | |
1219 | it->w = w; | |
1220 | it->f = XFRAME (w->frame); | |
1221 | ||
1222 | /* If realized faces have been removed, e.g. because of face | |
1223 | attribute changes of named faces, recompute them. */ | |
1224 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1225 | recompute_basic_faces (it->f); | |
1226 | ||
1227 | /* Should we highlight trailing whitespace? */ | |
1228 | value = find_symbol_value (Qshow_trailing_whitespace); | |
1229 | it->show_trailing_whitespace_p | |
1230 | = EQ (value, Qunbound) ? 0 : !NILP (value); | |
1231 | ||
1232 | /* Current value of the `space-width', and 'height' properties. */ | |
1233 | it->space_width = Qnil; | |
1234 | it->font_height = Qnil; | |
1235 | ||
1236 | /* Are control characters displayed as `^C'? */ | |
1237 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1238 | ||
1239 | /* -1 means everything between a CR and the following line end | |
1240 | is invisible. >0 means lines indented more than this value are | |
1241 | invisible. */ | |
1242 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1243 | ? XFASTINT (current_buffer->selective_display) | |
1244 | : (!NILP (current_buffer->selective_display) | |
1245 | ? -1 : 0)); | |
1246 | it->selective_display_ellipsis_p | |
1247 | = !NILP (current_buffer->selective_display_ellipses); | |
1248 | ||
1249 | /* Display table to use. */ | |
1250 | it->dp = window_display_table (w); | |
1251 | ||
1252 | /* Are multibyte characters enabled in current_buffer? */ | |
1253 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1254 | ||
1255 | /* Non-zero if we should highlight the region. */ | |
1256 | highlight_region_p | |
1257 | = (!NILP (Vtransient_mark_mode) | |
1258 | && !NILP (current_buffer->mark_active) | |
1259 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1260 | ||
1261 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1262 | start and end of a visible region in window IT->w. Set both to | |
1263 | -1 to indicate no region. */ | |
1264 | if (highlight_region_p | |
1265 | /* Maybe highlight only in selected window. */ | |
1266 | && (/* Either show region everywhere. */ | |
1267 | highlight_nonselected_windows | |
1268 | /* Or show region in the selected window. */ | |
1269 | || w == XWINDOW (selected_window) | |
1270 | /* Or show the region if we are in the mini-buffer and W is | |
1271 | the window the mini-buffer refers to. */ | |
1272 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1273 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1274 | { | |
1275 | int charpos = marker_position (current_buffer->mark); | |
1276 | it->region_beg_charpos = min (PT, charpos); | |
1277 | it->region_end_charpos = max (PT, charpos); | |
1278 | } | |
1279 | else | |
1280 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1281 | ||
1282 | /* Get the position at which the redisplay_end_trigger hook should | |
1283 | be run, if it is to be run at all. */ | |
1284 | if (MARKERP (w->redisplay_end_trigger) | |
1285 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1286 | it->redisplay_end_trigger_charpos | |
1287 | = marker_position (w->redisplay_end_trigger); | |
1288 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1289 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1290 | ||
1291 | /* Correct bogus values of tab_width. */ | |
1292 | it->tab_width = XINT (current_buffer->tab_width); | |
1293 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1294 | it->tab_width = 8; | |
1295 | ||
1296 | /* Are lines in the display truncated? */ | |
1297 | it->truncate_lines_p | |
1298 | = (base_face_id != DEFAULT_FACE_ID | |
1299 | || XINT (it->w->hscroll) | |
1300 | || (truncate_partial_width_windows | |
1301 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1302 | || !NILP (current_buffer->truncate_lines)); | |
1303 | ||
1304 | /* Get dimensions of truncation and continuation glyphs. These are | |
1305 | displayed as bitmaps under X, so we don't need them for such | |
1306 | frames. */ | |
1307 | if (!FRAME_WINDOW_P (it->f)) | |
1308 | { | |
1309 | if (it->truncate_lines_p) | |
1310 | { | |
1311 | /* We will need the truncation glyph. */ | |
1312 | xassert (it->glyph_row == NULL); | |
1313 | produce_special_glyphs (it, IT_TRUNCATION); | |
1314 | it->truncation_pixel_width = it->pixel_width; | |
1315 | } | |
1316 | else | |
1317 | { | |
1318 | /* We will need the continuation glyph. */ | |
1319 | xassert (it->glyph_row == NULL); | |
1320 | produce_special_glyphs (it, IT_CONTINUATION); | |
1321 | it->continuation_pixel_width = it->pixel_width; | |
1322 | } | |
1323 | ||
1324 | /* Reset these values to zero becaue the produce_special_glyphs | |
1325 | above has changed them. */ | |
1326 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1327 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1328 | } |
1329 | ||
1330 | /* Set this after getting the dimensions of truncation and | |
1331 | continuation glyphs, so that we don't produce glyphs when calling | |
1332 | produce_special_glyphs, above. */ | |
1333 | it->glyph_row = row; | |
1334 | it->area = TEXT_AREA; | |
1335 | ||
1336 | /* Get the dimensions of the display area. The display area | |
1337 | consists of the visible window area plus a horizontally scrolled | |
1338 | part to the left of the window. All x-values are relative to the | |
1339 | start of this total display area. */ | |
1340 | if (base_face_id != DEFAULT_FACE_ID) | |
1341 | { | |
1342 | /* Mode lines, menu bar in terminal frames. */ | |
1343 | it->first_visible_x = 0; | |
1344 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | it->first_visible_x | |
1349 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1350 | it->last_visible_x = (it->first_visible_x | |
1351 | + window_box_width (w, TEXT_AREA)); | |
1352 | ||
1353 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1354 | the right margin. Otherwise, leave room for the continuation | |
1355 | glyph(s). Truncation and continuation glyphs are not inserted | |
1356 | for window-based redisplay. */ | |
1357 | if (!FRAME_WINDOW_P (it->f)) | |
1358 | { | |
1359 | if (it->truncate_lines_p) | |
1360 | it->last_visible_x -= it->truncation_pixel_width; | |
1361 | else | |
1362 | it->last_visible_x -= it->continuation_pixel_width; | |
1363 | } | |
1364 | ||
1365 | it->top_line_p = WINDOW_WANTS_TOP_LINE_P (w); | |
1366 | it->current_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w) + w->vscroll; | |
1367 | } | |
1368 | ||
1369 | /* Leave room for a border glyph. */ | |
1370 | if (!FRAME_WINDOW_P (it->f) | |
1371 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1372 | it->last_visible_x -= 1; | |
1373 | ||
1374 | it->last_visible_y = window_text_bottom_y (w); | |
1375 | ||
1376 | /* For mode lines and alike, arrange for the first glyph having a | |
1377 | left box line if the face specifies a box. */ | |
1378 | if (base_face_id != DEFAULT_FACE_ID) | |
1379 | { | |
1380 | struct face *face; | |
1381 | ||
1382 | it->face_id = base_face_id; | |
1383 | ||
1384 | /* If we have a boxed mode line, make the first character appear | |
1385 | with a left box line. */ | |
1386 | face = FACE_FROM_ID (it->f, base_face_id); | |
1387 | if (face->box != FACE_NO_BOX) | |
1388 | it->start_of_box_run_p = 1; | |
1389 | } | |
1390 | ||
1391 | /* If a buffer position was specified, set the iterator there, | |
1392 | getting overlays and face properties from that position. */ | |
1393 | if (charpos > 0) | |
1394 | { | |
1395 | it->end_charpos = ZV; | |
1396 | it->face_id = -1; | |
1397 | IT_CHARPOS (*it) = charpos; | |
1398 | ||
1399 | /* Compute byte position if not specified. */ | |
1400 | if (bytepos <= 0) | |
1401 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1402 | else | |
1403 | IT_BYTEPOS (*it) = bytepos; | |
1404 | ||
1405 | /* Compute faces etc. */ | |
1406 | reseat (it, it->current.pos, 1); | |
1407 | } | |
1408 | ||
1409 | CHECK_IT (it); | |
1410 | } | |
1411 | ||
1412 | ||
1413 | /* Initialize IT for the display of window W with window start POS. */ | |
1414 | ||
1415 | void | |
1416 | start_display (it, w, pos) | |
1417 | struct it *it; | |
1418 | struct window *w; | |
1419 | struct text_pos pos; | |
1420 | { | |
1421 | int start_at_line_beg_p; | |
1422 | struct glyph_row *row; | |
1423 | int first_vpos = WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0; | |
1424 | int first_y; | |
1425 | ||
1426 | row = w->desired_matrix->rows + first_vpos; | |
1427 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1428 | first_y = it->current_y; | |
1429 | ||
1430 | /* If window start is not at a line start, move back to the line | |
1431 | start. This makes sure that we take continuation lines into | |
1432 | account. */ | |
1433 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1434 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1435 | if (!start_at_line_beg_p) | |
1436 | reseat_at_previous_visible_line_start (it); | |
1437 | ||
1438 | #if NO_PROMPT_IN_BUFFER | |
1439 | /* Take the mini-buffer prompt width into account for tab | |
1440 | calculations. */ | |
1441 | if (MINI_WINDOW_P (w) && IT_CHARPOS (*it) == BEGV) | |
1442 | { | |
1443 | /* Why is mini-buffer_prompt_width guaranteed to be set here? */ | |
1444 | it->prompt_width = minibuf_prompt_pixel_width; | |
1445 | } | |
1446 | #endif /* NO_PROMPT_IN_BUFFER */ | |
1447 | ||
1448 | /* If window start is not at a line start, skip forward to POS to | |
1449 | get the correct continuation_lines_width and current_x. */ | |
1450 | if (!start_at_line_beg_p) | |
1451 | { | |
1452 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1453 | ||
1454 | /* If lines are continued, this line may end in the middle of a | |
1455 | multi-glyph character (e.g. a control character displayed as | |
1456 | \003, or in the middle of an overlay string). In this case | |
1457 | move_it_to above will not have taken us to the start of | |
1458 | the continuation line but to the end of the continued line. */ | |
1459 | if (!it->truncate_lines_p && it->current_x > 0) | |
1460 | { | |
1461 | if (it->current.dpvec_index >= 0 | |
1462 | || it->current.overlay_string_index >= 0) | |
1463 | { | |
1464 | set_iterator_to_next (it); | |
1465 | move_it_in_display_line_to (it, -1, -1, 0); | |
1466 | } | |
1467 | it->continuation_lines_width += it->current_x; | |
1468 | } | |
1469 | ||
1470 | it->current_y = first_y; | |
1471 | it->vpos = 0; | |
1472 | it->current_x = it->hpos = 0; | |
1473 | } | |
1474 | ||
1475 | #if 0 /* Don't assert the following because start_display is sometimes | |
1476 | called intentionally with a window start that is not at a | |
1477 | line start. Please leave this code in as a comment. */ | |
1478 | ||
1479 | /* Window start should be on a line start, now. */ | |
1480 | xassert (it->continuation_lines_width | |
1481 | || IT_CHARPOS (it) == BEGV | |
1482 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1483 | #endif /* 0 */ | |
1484 | } | |
1485 | ||
1486 | ||
1487 | /* Initialize IT for stepping through current_buffer in window W, | |
1488 | starting at position POS that includes overlay string and display | |
1489 | vector/ control character translation position information. */ | |
1490 | ||
1491 | static void | |
1492 | init_from_display_pos (it, w, pos) | |
1493 | struct it *it; | |
1494 | struct window *w; | |
1495 | struct display_pos *pos; | |
1496 | { | |
1497 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1498 | text, so we might end up at a position different from POS. This | |
1499 | is only a problem when POS is a row start after a newline and an | |
1500 | overlay starts there with an after-string, and the overlay has an | |
1501 | invisible property. Since we don't skip invisible text in | |
1502 | display_line and elsewhere immediately after consuming the | |
1503 | newline before the row start, such a POS will not be in a string, | |
1504 | but the call to init_iterator below will move us to the | |
1505 | after-string. */ | |
1506 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1507 | NULL, DEFAULT_FACE_ID); | |
1508 | ||
1509 | /* If position is within an overlay string, set up IT to | |
1510 | the right overlay string. */ | |
1511 | if (pos->overlay_string_index >= 0) | |
1512 | { | |
1513 | int relative_index; | |
1514 | ||
1515 | /* We already have the first chunk of overlay strings in | |
1516 | IT->overlay_strings. Load more until the one for | |
1517 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1518 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1519 | { | |
1520 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1521 | it->current.overlay_string_index = 0; | |
1522 | while (n--) | |
1523 | { | |
1524 | load_overlay_strings (it); | |
1525 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | it->current.overlay_string_index = pos->overlay_string_index; | |
1530 | relative_index = (it->current.overlay_string_index | |
1531 | % OVERLAY_STRING_CHUNK_SIZE); | |
1532 | it->string = it->overlay_strings[relative_index]; | |
1533 | it->current.string_pos = pos->string_pos; | |
1534 | it->method = next_element_from_string; | |
1535 | } | |
1536 | else if (CHARPOS (pos->string_pos) >= 0) | |
1537 | { | |
1538 | /* Recorded position is not in an overlay string, but in another | |
1539 | string. This can only be a string from a `display' property. | |
1540 | IT should already be filled with that string. */ | |
1541 | it->current.string_pos = pos->string_pos; | |
1542 | xassert (STRINGP (it->string)); | |
1543 | } | |
1544 | ||
1545 | /* Restore position in display vector translations or control | |
1546 | character translations. */ | |
1547 | if (pos->dpvec_index >= 0) | |
1548 | { | |
1549 | /* This fills IT->dpvec. */ | |
1550 | get_next_display_element (it); | |
1551 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1552 | it->current.dpvec_index = pos->dpvec_index; | |
1553 | } | |
1554 | ||
1555 | CHECK_IT (it); | |
1556 | } | |
1557 | ||
1558 | ||
1559 | /* Initialize IT for stepping through current_buffer in window W | |
1560 | starting at ROW->start. */ | |
1561 | ||
1562 | static void | |
1563 | init_to_row_start (it, w, row) | |
1564 | struct it *it; | |
1565 | struct window *w; | |
1566 | struct glyph_row *row; | |
1567 | { | |
1568 | init_from_display_pos (it, w, &row->start); | |
1569 | it->continuation_lines_width = row->continuation_lines_width; | |
1570 | CHECK_IT (it); | |
1571 | } | |
1572 | ||
1573 | ||
1574 | /* Initialize IT for stepping through current_buffer in window W | |
1575 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1576 | ||
1577 | static void | |
1578 | init_to_row_end (it, w, row) | |
1579 | struct it *it; | |
1580 | struct window *w; | |
1581 | struct glyph_row *row; | |
1582 | { | |
1583 | init_from_display_pos (it, w, &row->end); | |
1584 | ||
1585 | if (row->continued_p) | |
1586 | it->continuation_lines_width = (row->continuation_lines_width | |
1587 | + row->pixel_width); | |
1588 | CHECK_IT (it); | |
1589 | } | |
1590 | ||
1591 | ||
1592 | ||
1593 | \f | |
1594 | /*********************************************************************** | |
1595 | Text properties | |
1596 | ***********************************************************************/ | |
1597 | ||
1598 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1599 | overlay changes. Set IT->stop_charpos to the next position where | |
1600 | to stop. */ | |
1601 | ||
1602 | static void | |
1603 | handle_stop (it) | |
1604 | struct it *it; | |
1605 | { | |
1606 | enum prop_handled handled; | |
1607 | int handle_overlay_change_p = 1; | |
1608 | struct props *p; | |
1609 | ||
1610 | it->dpvec = NULL; | |
1611 | it->current.dpvec_index = -1; | |
1612 | ||
1613 | do | |
1614 | { | |
1615 | handled = HANDLED_NORMALLY; | |
1616 | ||
1617 | /* Call text property handlers. */ | |
1618 | for (p = it_props; p->handler; ++p) | |
1619 | { | |
1620 | handled = p->handler (it); | |
1621 | ||
1622 | if (handled == HANDLED_RECOMPUTE_PROPS) | |
1623 | break; | |
1624 | else if (handled == HANDLED_RETURN) | |
1625 | return; | |
1626 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1627 | handle_overlay_change_p = 0; | |
1628 | } | |
1629 | ||
1630 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1631 | { | |
1632 | /* Don't check for overlay strings below when set to deliver | |
1633 | characters from a display vector. */ | |
1634 | if (it->method == next_element_from_display_vector) | |
1635 | handle_overlay_change_p = 0; | |
1636 | ||
1637 | /* Handle overlay changes. */ | |
1638 | if (handle_overlay_change_p) | |
1639 | handled = handle_overlay_change (it); | |
1640 | ||
1641 | /* Determine where to stop next. */ | |
1642 | if (handled == HANDLED_NORMALLY) | |
1643 | compute_stop_pos (it); | |
1644 | } | |
1645 | } | |
1646 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1647 | } | |
1648 | ||
1649 | ||
1650 | /* Compute IT->stop_charpos from text property and overlay change | |
1651 | information for IT's current position. */ | |
1652 | ||
1653 | static void | |
1654 | compute_stop_pos (it) | |
1655 | struct it *it; | |
1656 | { | |
1657 | register INTERVAL iv, next_iv; | |
1658 | Lisp_Object object, limit, position; | |
1659 | ||
1660 | /* If nowhere else, stop at the end. */ | |
1661 | it->stop_charpos = it->end_charpos; | |
1662 | ||
1663 | if (STRINGP (it->string)) | |
1664 | { | |
1665 | /* Strings are usually short, so don't limit the search for | |
1666 | properties. */ | |
1667 | object = it->string; | |
1668 | limit = Qnil; | |
1669 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1670 | } | |
1671 | else | |
1672 | { | |
1673 | int charpos; | |
1674 | ||
1675 | /* If next overlay change is in front of the current stop pos | |
1676 | (which is IT->end_charpos), stop there. Note: value of | |
1677 | next_overlay_change is point-max if no overlay change | |
1678 | follows. */ | |
1679 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1680 | if (charpos < it->stop_charpos) | |
1681 | it->stop_charpos = charpos; | |
1682 | ||
1683 | /* If showing the region, we have to stop at the region | |
1684 | start or end because the face might change there. */ | |
1685 | if (it->region_beg_charpos > 0) | |
1686 | { | |
1687 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1688 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1689 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1690 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1691 | } | |
1692 | ||
1693 | /* Set up variables for computing the stop position from text | |
1694 | property changes. */ | |
1695 | XSETBUFFER (object, current_buffer); | |
1696 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1697 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1698 | ||
1699 | } | |
1700 | ||
1701 | /* Get the interval containing IT's position. Value is a null | |
1702 | interval if there isn't such an interval. */ | |
1703 | iv = validate_interval_range (object, &position, &position, 0); | |
1704 | if (!NULL_INTERVAL_P (iv)) | |
1705 | { | |
1706 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1707 | struct props *p; | |
1708 | ||
1709 | /* Get properties here. */ | |
1710 | for (p = it_props; p->handler; ++p) | |
1711 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1712 | ||
1713 | /* Look for an interval following iv that has different | |
1714 | properties. */ | |
1715 | for (next_iv = next_interval (iv); | |
1716 | (!NULL_INTERVAL_P (next_iv) | |
1717 | && (NILP (limit) | |
1718 | || XFASTINT (limit) > next_iv->position)); | |
1719 | next_iv = next_interval (next_iv)) | |
1720 | { | |
1721 | for (p = it_props; p->handler; ++p) | |
1722 | { | |
1723 | Lisp_Object new_value; | |
1724 | ||
1725 | new_value = textget (next_iv->plist, *p->name); | |
1726 | if (!EQ (values_here[p->idx], new_value)) | |
1727 | break; | |
1728 | } | |
1729 | ||
1730 | if (p->handler) | |
1731 | break; | |
1732 | } | |
1733 | ||
1734 | if (!NULL_INTERVAL_P (next_iv)) | |
1735 | { | |
1736 | if (INTEGERP (limit) | |
1737 | && next_iv->position >= XFASTINT (limit)) | |
1738 | /* No text property change up to limit. */ | |
1739 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1740 | else | |
1741 | /* Text properties change in next_iv. */ | |
1742 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | xassert (STRINGP (it->string) | |
1747 | || (it->stop_charpos >= BEGV | |
1748 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1749 | } | |
1750 | ||
1751 | ||
1752 | /* Return the position of the next overlay change after POS in | |
1753 | current_buffer. Value is point-max if no overlay change | |
1754 | follows. This is like `next-overlay-change' but doesn't use | |
1755 | xmalloc. */ | |
1756 | ||
1757 | static int | |
1758 | next_overlay_change (pos) | |
1759 | int pos; | |
1760 | { | |
1761 | int noverlays; | |
1762 | int endpos; | |
1763 | Lisp_Object *overlays; | |
1764 | int len; | |
1765 | int i; | |
1766 | ||
1767 | /* Get all overlays at the given position. */ | |
1768 | len = 10; | |
1769 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1770 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1771 | if (noverlays > len) | |
1772 | { | |
1773 | len = noverlays; | |
1774 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1775 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1776 | } | |
1777 | ||
1778 | /* If any of these overlays ends before endpos, | |
1779 | use its ending point instead. */ | |
1780 | for (i = 0; i < noverlays; ++i) | |
1781 | { | |
1782 | Lisp_Object oend; | |
1783 | int oendpos; | |
1784 | ||
1785 | oend = OVERLAY_END (overlays[i]); | |
1786 | oendpos = OVERLAY_POSITION (oend); | |
1787 | endpos = min (endpos, oendpos); | |
1788 | } | |
1789 | ||
1790 | return endpos; | |
1791 | } | |
1792 | ||
1793 | ||
1794 | \f | |
1795 | /*********************************************************************** | |
1796 | Fontification | |
1797 | ***********************************************************************/ | |
1798 | ||
1799 | /* Handle changes in the `fontified' property of the current buffer by | |
1800 | calling hook functions from Qfontification_functions to fontify | |
1801 | regions of text. */ | |
1802 | ||
1803 | static enum prop_handled | |
1804 | handle_fontified_prop (it) | |
1805 | struct it *it; | |
1806 | { | |
1807 | Lisp_Object prop, pos; | |
1808 | enum prop_handled handled = HANDLED_NORMALLY; | |
1809 | ||
1810 | /* Get the value of the `fontified' property at IT's current buffer | |
1811 | position. (The `fontified' property doesn't have a special | |
1812 | meaning in strings.) If the value is nil, call functions from | |
1813 | Qfontification_functions. */ | |
1814 | if (!STRINGP (it->string) | |
1815 | && it->s == NULL | |
1816 | && !NILP (Vfontification_functions) | |
1817 | && (pos = make_number (IT_CHARPOS (*it)), | |
1818 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1819 | NILP (prop))) | |
1820 | { | |
1821 | Lisp_Object args[2]; | |
1822 | ||
1823 | /* Run the hook functions. */ | |
1824 | args[0] = Qfontification_functions; | |
1825 | args[1] = pos; | |
1826 | Frun_hook_with_args (make_number (2), args); | |
1827 | ||
1828 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1829 | something. This avoids an endless loop if they failed to | |
1830 | fontify the text for which reason ever. */ | |
1831 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1832 | handled = HANDLED_RECOMPUTE_PROPS; | |
1833 | } | |
1834 | ||
1835 | return handled; | |
1836 | } | |
1837 | ||
1838 | ||
1839 | \f | |
1840 | /*********************************************************************** | |
1841 | Faces | |
1842 | ***********************************************************************/ | |
1843 | ||
1844 | /* Set up iterator IT from face properties at its current position. | |
1845 | Called from handle_stop. */ | |
1846 | ||
1847 | static enum prop_handled | |
1848 | handle_face_prop (it) | |
1849 | struct it *it; | |
1850 | { | |
1851 | int new_face_id, next_stop; | |
1852 | ||
1853 | if (!STRINGP (it->string)) | |
1854 | { | |
1855 | new_face_id | |
1856 | = face_at_buffer_position (it->w, | |
1857 | IT_CHARPOS (*it), | |
1858 | it->region_beg_charpos, | |
1859 | it->region_end_charpos, | |
1860 | &next_stop, | |
1861 | (IT_CHARPOS (*it) | |
1862 | + TEXT_PROP_DISTANCE_LIMIT), | |
1863 | 0); | |
1864 | ||
1865 | /* Is this a start of a run of characters with box face? | |
1866 | Caveat: this can be called for a freshly initialized | |
1867 | iterator; face_id is -1 is this case. We know that the new | |
1868 | face will not change until limit, i.e. if the new face has a | |
1869 | box, all characters up to limit will have one. But, as | |
1870 | usual, we don't know whether limit is really the end. */ | |
1871 | if (new_face_id != it->face_id) | |
1872 | { | |
1873 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1874 | ||
1875 | /* If new face has a box but old face has not, this is | |
1876 | the start of a run of characters with box, i.e. it has | |
1877 | a shadow on the left side. The value of face_id of the | |
1878 | iterator will be -1 if this is the initial call that gets | |
1879 | the face. In this case, we have to look in front of IT's | |
1880 | position and see whether there is a face != new_face_id. */ | |
1881 | it->start_of_box_run_p | |
1882 | = (new_face->box != FACE_NO_BOX | |
1883 | && (it->face_id >= 0 | |
1884 | || IT_CHARPOS (*it) == BEG | |
1885 | || new_face_id != face_before_it_pos (it))); | |
1886 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1887 | } | |
1888 | } | |
1889 | else | |
1890 | { | |
1891 | new_face_id | |
1892 | = face_at_string_position (it->w, | |
1893 | it->string, | |
1894 | IT_STRING_CHARPOS (*it), | |
1895 | (it->current.overlay_string_index >= 0 | |
1896 | ? IT_CHARPOS (*it) | |
1897 | : 0), | |
1898 | it->region_beg_charpos, | |
1899 | it->region_end_charpos, | |
1900 | &next_stop, | |
1901 | it->base_face_id); | |
1902 | ||
1903 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
1904 | /* If IT is used to display a mode line we would really like to | |
1905 | use the mode line face instead of the frame's default face. */ | |
1906 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
1907 | && new_face_id == DEFAULT_FACE_ID) | |
1908 | new_face_id = MODE_LINE_FACE_ID; | |
1909 | #endif | |
1910 | ||
1911 | /* Is this a start of a run of characters with box? Caveat: | |
1912 | this can be called for a freshly allocated iterator; face_id | |
1913 | is -1 is this case. We know that the new face will not | |
1914 | change until the next check pos, i.e. if the new face has a | |
1915 | box, all characters up to that position will have a | |
1916 | box. But, as usual, we don't know whether that position | |
1917 | is really the end. */ | |
1918 | if (new_face_id != it->face_id) | |
1919 | { | |
1920 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1921 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
1922 | ||
1923 | /* If new face has a box but old face hasn't, this is the | |
1924 | start of a run of characters with box, i.e. it has a | |
1925 | shadow on the left side. */ | |
1926 | it->start_of_box_run_p | |
1927 | = new_face->box && (old_face == NULL || !old_face->box); | |
1928 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1929 | } | |
1930 | } | |
1931 | ||
1932 | it->face_id = new_face_id; | |
1933 | it->charset = CHARSET_ASCII; | |
1934 | return HANDLED_NORMALLY; | |
1935 | } | |
1936 | ||
1937 | ||
1938 | /* Compute the face one character before or after the current position | |
1939 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
1940 | position. Value is the id of the face. */ | |
1941 | ||
1942 | static int | |
1943 | face_before_or_after_it_pos (it, before_p) | |
1944 | struct it *it; | |
1945 | int before_p; | |
1946 | { | |
1947 | int face_id, limit; | |
1948 | int next_check_charpos; | |
1949 | struct text_pos pos; | |
1950 | ||
1951 | xassert (it->s == NULL); | |
1952 | ||
1953 | if (STRINGP (it->string)) | |
1954 | { | |
1955 | /* No face change past the end of the string (for the case | |
1956 | we are padding with spaces). No face change before the | |
1957 | string start. */ | |
1958 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
1959 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
1960 | return it->face_id; | |
1961 | ||
1962 | /* Set pos to the position before or after IT's current position. */ | |
1963 | if (before_p) | |
1964 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
1965 | else | |
1966 | pos = string_pos (IT_STRING_CHARPOS (*it) + 1, it->string); | |
1967 | ||
1968 | /* Get the face for ASCII, or unibyte. */ | |
1969 | face_id | |
1970 | = face_at_string_position (it->w, | |
1971 | it->string, | |
1972 | CHARPOS (pos), | |
1973 | (it->current.overlay_string_index >= 0 | |
1974 | ? IT_CHARPOS (*it) | |
1975 | : 0), | |
1976 | it->region_beg_charpos, | |
1977 | it->region_end_charpos, | |
1978 | &next_check_charpos, | |
1979 | it->base_face_id); | |
1980 | ||
1981 | /* Correct the face for charsets different from ASCII. Do it | |
1982 | for the multibyte case only. The face returned above is | |
1983 | suitable for unibyte text if IT->string is unibyte. */ | |
1984 | if (STRING_MULTIBYTE (it->string)) | |
1985 | { | |
1986 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
1987 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
1988 | int c, len, charset; | |
1989 | ||
4fdb80f2 | 1990 | c = string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1991 | charset = CHAR_CHARSET (c); |
1992 | if (charset != CHARSET_ASCII) | |
1993 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
1994 | } | |
1995 | } | |
1996 | else | |
1997 | { | |
70851746 GM |
1998 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
1999 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2000 | return it->face_id; | |
2001 | ||
5f5c8ee5 GM |
2002 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2003 | pos = it->current.pos; | |
2004 | ||
2005 | if (before_p) | |
2006 | DEC_TEXT_POS (pos); | |
2007 | else | |
2008 | INC_TEXT_POS (pos); | |
70851746 | 2009 | |
5f5c8ee5 GM |
2010 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2011 | face_id = face_at_buffer_position (it->w, | |
2012 | CHARPOS (pos), | |
2013 | it->region_beg_charpos, | |
2014 | it->region_end_charpos, | |
2015 | &next_check_charpos, | |
2016 | limit, 0); | |
2017 | ||
2018 | /* Correct the face for charsets different from ASCII. Do it | |
2019 | for the multibyte case only. The face returned above is | |
2020 | suitable for unibyte text if current_buffer is unibyte. */ | |
2021 | if (it->multibyte_p) | |
2022 | { | |
2023 | int charset = charset_at_position (pos); | |
2024 | if (charset != CHARSET_ASCII) | |
2025 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | return face_id; | |
2030 | } | |
2031 | ||
2032 | ||
2033 | \f | |
2034 | /*********************************************************************** | |
2035 | Invisible text | |
2036 | ***********************************************************************/ | |
2037 | ||
2038 | /* Set up iterator IT from invisible properties at its current | |
2039 | position. Called from handle_stop. */ | |
2040 | ||
2041 | static enum prop_handled | |
2042 | handle_invisible_prop (it) | |
2043 | struct it *it; | |
2044 | { | |
2045 | enum prop_handled handled = HANDLED_NORMALLY; | |
2046 | ||
2047 | if (STRINGP (it->string)) | |
2048 | { | |
2049 | extern Lisp_Object Qinvisible; | |
2050 | Lisp_Object prop, end_charpos, limit, charpos; | |
2051 | ||
2052 | /* Get the value of the invisible text property at the | |
2053 | current position. Value will be nil if there is no such | |
2054 | property. */ | |
2055 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2056 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2057 | ||
2058 | if (!NILP (prop)) | |
2059 | { | |
2060 | handled = HANDLED_RECOMPUTE_PROPS; | |
2061 | ||
2062 | /* Get the position at which the next change of the | |
2063 | invisible text property can be found in IT->string. | |
2064 | Value will be nil if the property value is the same for | |
2065 | all the rest of IT->string. */ | |
2066 | XSETINT (limit, XSTRING (it->string)->size); | |
2067 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2068 | it->string, limit); | |
2069 | ||
2070 | /* Text at current position is invisible. The next | |
2071 | change in the property is at position end_charpos. | |
2072 | Move IT's current position to that position. */ | |
2073 | if (INTEGERP (end_charpos) | |
2074 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2075 | { | |
2076 | struct text_pos old; | |
2077 | old = it->current.string_pos; | |
2078 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2079 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2080 | } | |
2081 | else | |
2082 | { | |
2083 | /* The rest of the string is invisible. If this is an | |
2084 | overlay string, proceed with the next overlay string | |
2085 | or whatever comes and return a character from there. */ | |
2086 | if (it->current.overlay_string_index >= 0) | |
2087 | { | |
2088 | next_overlay_string (it); | |
2089 | /* Don't check for overlay strings when we just | |
2090 | finished processing them. */ | |
2091 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2092 | } | |
2093 | else | |
2094 | { | |
2095 | struct Lisp_String *s = XSTRING (it->string); | |
2096 | IT_STRING_CHARPOS (*it) = s->size; | |
2097 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2098 | } | |
2099 | } | |
2100 | } | |
2101 | } | |
2102 | else | |
2103 | { | |
2104 | int visible_p, newpos, next_stop; | |
2105 | Lisp_Object pos, prop; | |
2106 | ||
2107 | /* First of all, is there invisible text at this position? */ | |
2108 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2109 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2110 | ||
2111 | /* If we are on invisible text, skip over it. */ | |
2112 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2113 | { | |
2114 | /* Record whether we have to display an ellipsis for the | |
2115 | invisible text. */ | |
2116 | int display_ellipsis_p | |
2117 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2118 | ||
2119 | handled = HANDLED_RECOMPUTE_PROPS; | |
2120 | ||
2121 | /* Loop skipping over invisible text. The loop is left at | |
2122 | ZV or with IT on the first char being visible again. */ | |
2123 | do | |
2124 | { | |
2125 | /* Try to skip some invisible text. Return value is the | |
2126 | position reached which can be equal to IT's position | |
2127 | if there is nothing invisible here. This skips both | |
2128 | over invisible text properties and overlays with | |
2129 | invisible property. */ | |
2130 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2131 | &next_stop, ZV, it->window); | |
2132 | ||
2133 | /* If we skipped nothing at all we weren't at invisible | |
2134 | text in the first place. If everything to the end of | |
2135 | the buffer was skipped, end the loop. */ | |
2136 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2137 | visible_p = 1; | |
2138 | else | |
2139 | { | |
2140 | /* We skipped some characters but not necessarily | |
2141 | all there are. Check if we ended up on visible | |
2142 | text. Fget_char_property returns the property of | |
2143 | the char before the given position, i.e. if we | |
2144 | get visible_p = 1, this means that the char at | |
2145 | newpos is visible. */ | |
2146 | XSETFASTINT (pos, newpos); | |
2147 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2148 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2149 | } | |
2150 | ||
2151 | /* If we ended up on invisible text, proceed to | |
2152 | skip starting with next_stop. */ | |
2153 | if (!visible_p) | |
2154 | IT_CHARPOS (*it) = next_stop; | |
2155 | } | |
2156 | while (!visible_p); | |
2157 | ||
2158 | /* The position newpos is now either ZV or on visible text. */ | |
2159 | IT_CHARPOS (*it) = newpos; | |
2160 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2161 | ||
2162 | /* Maybe return `...' next for the end of the invisible text. */ | |
2163 | if (display_ellipsis_p) | |
2164 | { | |
2165 | if (it->dp | |
2166 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2167 | { | |
2168 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2169 | it->dpvec = v->contents; | |
2170 | it->dpend = v->contents + v->size; | |
2171 | } | |
2172 | else | |
2173 | { | |
2174 | /* Default `...'. */ | |
2175 | it->dpvec = default_invis_vector; | |
2176 | it->dpend = default_invis_vector + 3; | |
2177 | } | |
2178 | ||
2179 | /* The ellipsis display does not replace the display of | |
2180 | the character at the new position. Indicate this by | |
2181 | setting IT->dpvec_char_len to zero. */ | |
2182 | it->dpvec_char_len = 0; | |
2183 | ||
2184 | it->current.dpvec_index = 0; | |
2185 | it->method = next_element_from_display_vector; | |
2186 | } | |
2187 | } | |
2188 | } | |
2189 | ||
2190 | return handled; | |
2191 | } | |
2192 | ||
2193 | ||
2194 | \f | |
2195 | /*********************************************************************** | |
2196 | 'display' property | |
2197 | ***********************************************************************/ | |
2198 | ||
2199 | /* Set up iterator IT from `display' property at its current position. | |
2200 | Called from handle_stop. */ | |
2201 | ||
2202 | static enum prop_handled | |
2203 | handle_display_prop (it) | |
2204 | struct it *it; | |
2205 | { | |
2206 | Lisp_Object prop, object; | |
2207 | struct text_pos *position; | |
2208 | int space_or_image_found_p; | |
2209 | ||
2210 | if (STRINGP (it->string)) | |
2211 | { | |
2212 | object = it->string; | |
2213 | position = &it->current.string_pos; | |
2214 | } | |
2215 | else | |
2216 | { | |
2217 | object = Qnil; | |
2218 | position = &it->current.pos; | |
2219 | } | |
2220 | ||
2221 | /* Reset those iterator values set from display property values. */ | |
2222 | it->font_height = Qnil; | |
2223 | it->space_width = Qnil; | |
2224 | it->voffset = 0; | |
2225 | ||
2226 | /* We don't support recursive `display' properties, i.e. string | |
2227 | values that have a string `display' property, that have a string | |
2228 | `display' property etc. */ | |
2229 | if (!it->string_from_display_prop_p) | |
2230 | it->area = TEXT_AREA; | |
2231 | ||
2232 | prop = Fget_char_property (make_number (position->charpos), | |
2233 | Qdisplay, object); | |
2234 | if (NILP (prop)) | |
2235 | return HANDLED_NORMALLY; | |
2236 | ||
2237 | space_or_image_found_p = 0; | |
2238 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
2239 | { | |
2240 | while (CONSP (prop)) | |
2241 | { | |
2242 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2243 | space_or_image_found_p = 1; | |
2244 | prop = XCDR (prop); | |
2245 | } | |
2246 | } | |
2247 | else if (VECTORP (prop)) | |
2248 | { | |
2249 | int i; | |
2250 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2251 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2252 | object, position)) | |
2253 | space_or_image_found_p = 1; | |
2254 | } | |
2255 | else | |
2256 | { | |
2257 | if (handle_single_display_prop (it, prop, object, position)) | |
2258 | space_or_image_found_p = 1; | |
2259 | } | |
2260 | ||
2261 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2262 | } | |
2263 | ||
2264 | ||
2265 | /* Value is the position of the end of the `display' property stating | |
2266 | at START_POS in OBJECT. */ | |
2267 | ||
2268 | static struct text_pos | |
2269 | display_prop_end (it, object, start_pos) | |
2270 | struct it *it; | |
2271 | Lisp_Object object; | |
2272 | struct text_pos start_pos; | |
2273 | { | |
2274 | Lisp_Object end; | |
2275 | struct text_pos end_pos; | |
2276 | ||
2277 | /* Characters having this form of property are not displayed, so | |
2278 | we have to find the end of the property. */ | |
2279 | end = Fnext_single_property_change (make_number (start_pos.charpos), | |
2280 | Qdisplay, object, Qnil); | |
2281 | if (NILP (end)) | |
2282 | { | |
2283 | /* A nil value of `end' means there are no changes of the | |
2284 | property to the end of the buffer or string. */ | |
2285 | if (it->current.overlay_string_index >= 0) | |
2286 | end_pos.charpos = XSTRING (it->string)->size; | |
2287 | else | |
2288 | end_pos.charpos = it->end_charpos; | |
2289 | } | |
2290 | else | |
2291 | end_pos.charpos = XFASTINT (end); | |
2292 | ||
2293 | if (STRINGP (it->string)) | |
2294 | compute_string_pos (&end_pos, start_pos, it->string); | |
2295 | else | |
2296 | end_pos.bytepos = CHAR_TO_BYTE (end_pos.charpos); | |
2297 | ||
2298 | return end_pos; | |
2299 | } | |
2300 | ||
2301 | ||
2302 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2303 | is the object in which the `display' property was found. *POSITION | |
2304 | is the position at which it was found. | |
2305 | ||
2306 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2307 | end position of the `display' property. | |
2308 | ||
2309 | Value is non-zero if a `space' or `image' property value was found. */ | |
2310 | ||
2311 | static int | |
2312 | handle_single_display_prop (it, prop, object, position) | |
2313 | struct it *it; | |
2314 | Lisp_Object prop; | |
2315 | Lisp_Object object; | |
2316 | struct text_pos *position; | |
2317 | { | |
2318 | Lisp_Object value; | |
2319 | int space_or_image_found_p = 0; | |
2320 | ||
2321 | Lisp_Object form; | |
2322 | ||
2323 | /* If PROP is a list of the form `(:when FORM VALUE)', FORM is | |
2324 | evaluated. If the result is nil, VALUE is ignored. */ | |
2325 | form = Qt; | |
2326 | if (CONSP (prop) && EQ (XCAR (prop), QCwhen)) | |
2327 | { | |
2328 | prop = XCDR (prop); | |
2329 | if (!CONSP (prop)) | |
2330 | return 0; | |
2331 | form = XCAR (prop); | |
2332 | prop = XCDR (prop); | |
2333 | if (!CONSP (prop)) | |
2334 | return 0; | |
2335 | prop = XCAR (prop); | |
2336 | } | |
2337 | ||
2338 | if (!NILP (form) && !EQ (form, Qt)) | |
2339 | { | |
2340 | struct gcpro gcpro1; | |
2341 | struct text_pos end_pos, pt; | |
2342 | ||
2343 | end_pos = display_prop_end (it, object, *position); | |
2344 | GCPRO1 (form); | |
2345 | ||
2346 | /* Temporarily set point to the end position, and then evaluate | |
2347 | the form. This makes `(eolp)' work as FORM. */ | |
2348 | CHARPOS (pt) = PT; | |
2349 | BYTEPOS (pt) = PT_BYTE; | |
2350 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2351 | form = eval_form (form); | |
2352 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
2353 | UNGCPRO; | |
2354 | } | |
2355 | ||
2356 | if (NILP (form)) | |
2357 | return 0; | |
2358 | ||
2359 | if (CONSP (prop) | |
2360 | && EQ (XCAR (prop), Qheight) | |
2361 | && CONSP (XCDR (prop))) | |
2362 | { | |
2363 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2364 | return 0; | |
2365 | ||
2366 | /* `(height HEIGHT)'. */ | |
2367 | it->font_height = XCAR (XCDR (prop)); | |
2368 | if (!NILP (it->font_height)) | |
2369 | { | |
2370 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2371 | int new_height = -1; | |
2372 | ||
2373 | if (CONSP (it->font_height) | |
2374 | && (EQ (XCAR (it->font_height), Qplus) | |
2375 | || EQ (XCAR (it->font_height), Qminus)) | |
2376 | && CONSP (XCDR (it->font_height)) | |
2377 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2378 | { | |
2379 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2380 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2381 | if (EQ (XCAR (it->font_height), Qplus)) | |
2382 | steps = - steps; | |
2383 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2384 | } | |
2385 | else if (SYMBOLP (it->font_height)) | |
2386 | { | |
2387 | /* Call function with current height as argument. | |
2388 | Value is the new height. */ | |
2389 | Lisp_Object form, height; | |
2390 | struct gcpro gcpro1; | |
2391 | ||
2392 | height = face->lface[LFACE_HEIGHT_INDEX]; | |
2393 | form = Fcons (it->font_height, Fcons (height, Qnil)); | |
2394 | GCPRO1 (form); | |
2395 | height = eval_form (form); | |
2396 | if (NUMBERP (height)) | |
2397 | new_height = XFLOATINT (height); | |
2398 | UNGCPRO; | |
2399 | } | |
2400 | else if (NUMBERP (it->font_height)) | |
2401 | { | |
2402 | /* Value is a multiple of the canonical char height. */ | |
2403 | struct face *face; | |
2404 | ||
2405 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2406 | new_height = (XFLOATINT (it->font_height) | |
2407 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2408 | } | |
2409 | else | |
2410 | { | |
2411 | /* Evaluate IT->font_height with `height' bound to the | |
2412 | current specified height to get the new height. */ | |
2413 | Lisp_Object value; | |
2414 | int count = specpdl_ptr - specpdl; | |
2415 | ||
2416 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2417 | value = eval_form (it->font_height); | |
2418 | unbind_to (count, Qnil); | |
2419 | ||
2420 | if (NUMBERP (value)) | |
2421 | new_height = XFLOATINT (value); | |
2422 | } | |
2423 | ||
2424 | if (new_height > 0) | |
2425 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2426 | } | |
2427 | } | |
2428 | else if (CONSP (prop) | |
2429 | && EQ (XCAR (prop), Qspace_width) | |
2430 | && CONSP (XCDR (prop))) | |
2431 | { | |
2432 | /* `(space_width WIDTH)'. */ | |
2433 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2434 | return 0; | |
2435 | ||
2436 | value = XCAR (XCDR (prop)); | |
2437 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2438 | it->space_width = value; | |
2439 | } | |
2440 | else if (CONSP (prop) | |
2441 | && EQ (XCAR (prop), Qraise) | |
2442 | && CONSP (XCDR (prop))) | |
2443 | { | |
2444 | #ifdef HAVE_WINDOW_SYSTEM | |
2445 | /* `(raise FACTOR)'. */ | |
2446 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2447 | return 0; | |
2448 | ||
2449 | value = XCAR (XCDR (prop)); | |
2450 | if (NUMBERP (value)) | |
2451 | { | |
2452 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2453 | it->voffset = - (XFLOATINT (value) | |
2454 | * (face->font->ascent + face->font->descent)); | |
2455 | } | |
2456 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2457 | } | |
2458 | else if (!it->string_from_display_prop_p) | |
2459 | { | |
2460 | /* `(left-margin VALUE)' or `(right-margin VALUE) | |
2461 | or `(nil VALUE)' or VALUE. */ | |
2462 | Lisp_Object location, value; | |
2463 | struct text_pos start_pos; | |
2464 | int valid_p; | |
2465 | ||
2466 | /* Characters having this form of property are not displayed, so | |
2467 | we have to find the end of the property. */ | |
2468 | space_or_image_found_p = 1; | |
2469 | start_pos = *position; | |
2470 | *position = display_prop_end (it, object, start_pos); | |
2471 | ||
2472 | /* Let's stop at the new position and assume that all | |
2473 | text properties change there. */ | |
2474 | it->stop_charpos = position->charpos; | |
2475 | ||
2476 | if (CONSP (prop) | |
2477 | && !EQ (XCAR (prop), Qspace) | |
2478 | && !EQ (XCAR (prop), Qimage)) | |
2479 | { | |
2480 | location = XCAR (prop); | |
2481 | value = XCDR (prop); | |
2482 | } | |
2483 | else | |
2484 | { | |
2485 | location = Qnil; | |
2486 | value = prop; | |
2487 | } | |
2488 | ||
2489 | #ifdef HAVE_WINDOW_SYSTEM | |
2490 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2491 | valid_p = STRINGP (value); | |
2492 | else | |
2493 | valid_p = (STRINGP (value) | |
2494 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2495 | || valid_image_p (value)); | |
2496 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2497 | valid_p = STRINGP (value); | |
2498 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2499 | ||
2500 | if ((EQ (location, Qleft_margin) | |
2501 | || EQ (location, Qright_margin) | |
2502 | || NILP (location)) | |
2503 | && valid_p) | |
2504 | { | |
2505 | /* Save current settings of IT so that we can restore them | |
2506 | when we are finished with the glyph property value. */ | |
2507 | push_it (it); | |
2508 | ||
2509 | if (NILP (location)) | |
2510 | it->area = TEXT_AREA; | |
2511 | else if (EQ (location, Qleft_margin)) | |
2512 | it->area = LEFT_MARGIN_AREA; | |
2513 | else | |
2514 | it->area = RIGHT_MARGIN_AREA; | |
2515 | ||
2516 | if (STRINGP (value)) | |
2517 | { | |
2518 | it->string = value; | |
2519 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2520 | it->current.overlay_string_index = -1; | |
2521 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2522 | it->end_charpos = it->string_nchars | |
2523 | = XSTRING (it->string)->size; | |
2524 | it->method = next_element_from_string; | |
2525 | it->stop_charpos = 0; | |
2526 | it->string_from_display_prop_p = 1; | |
2527 | } | |
2528 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2529 | { | |
2530 | it->method = next_element_from_stretch; | |
2531 | it->object = value; | |
2532 | it->current.pos = it->position = start_pos; | |
2533 | } | |
2534 | #ifdef HAVE_WINDOW_SYSTEM | |
2535 | else | |
2536 | { | |
2537 | it->what = IT_IMAGE; | |
2538 | it->image_id = lookup_image (it->f, value); | |
2539 | it->position = start_pos; | |
2540 | it->object = NILP (object) ? it->w->buffer : object; | |
2541 | it->method = next_element_from_image; | |
2542 | ||
2543 | /* Say that we don't have consumed the characters with | |
2544 | `display' property yet. The call to pop_it in | |
2545 | set_iterator_to_next will clean this up. */ | |
2546 | *position = start_pos; | |
2547 | } | |
2548 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2549 | } | |
2550 | } | |
2551 | ||
2552 | return space_or_image_found_p; | |
2553 | } | |
2554 | ||
2555 | ||
2556 | \f | |
2557 | /*********************************************************************** | |
2558 | Overlay strings | |
2559 | ***********************************************************************/ | |
2560 | ||
2561 | /* The following structure is used to record overlay strings for | |
2562 | later sorting in load_overlay_strings. */ | |
2563 | ||
2564 | struct overlay_entry | |
2565 | { | |
2566 | Lisp_Object string; | |
2567 | int priority; | |
2568 | int after_string_p; | |
2569 | }; | |
2570 | ||
2571 | ||
2572 | /* Set up iterator IT from overlay strings at its current position. | |
2573 | Called from handle_stop. */ | |
2574 | ||
2575 | static enum prop_handled | |
2576 | handle_overlay_change (it) | |
2577 | struct it *it; | |
2578 | { | |
2579 | /* Overlays are handled in current_buffer only. */ | |
2580 | if (STRINGP (it->string)) | |
2581 | return HANDLED_NORMALLY; | |
2582 | else | |
2583 | return (get_overlay_strings (it) | |
2584 | ? HANDLED_RECOMPUTE_PROPS | |
2585 | : HANDLED_NORMALLY); | |
2586 | } | |
2587 | ||
2588 | ||
2589 | /* Set up the next overlay string for delivery by IT, if there is an | |
2590 | overlay string to deliver. Called by set_iterator_to_next when the | |
2591 | end of the current overlay string is reached. If there are more | |
2592 | overlay strings to display, IT->string and | |
2593 | IT->current.overlay_string_index are set appropriately here. | |
2594 | Otherwise IT->string is set to nil. */ | |
2595 | ||
2596 | static void | |
2597 | next_overlay_string (it) | |
2598 | struct it *it; | |
2599 | { | |
2600 | ++it->current.overlay_string_index; | |
2601 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2602 | { | |
2603 | /* No more overlay strings. Restore IT's settings to what | |
2604 | they were before overlay strings were processed, and | |
2605 | continue to deliver from current_buffer. */ | |
2606 | pop_it (it); | |
2607 | xassert (it->stop_charpos >= BEGV | |
2608 | && it->stop_charpos <= it->end_charpos); | |
2609 | it->string = Qnil; | |
2610 | it->current.overlay_string_index = -1; | |
2611 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2612 | it->n_overlay_strings = 0; | |
2613 | it->method = next_element_from_buffer; | |
2614 | } | |
2615 | else | |
2616 | { | |
2617 | /* There are more overlay strings to process. If | |
2618 | IT->current.overlay_string_index has advanced to a position | |
2619 | where we must load IT->overlay_strings with more strings, do | |
2620 | it. */ | |
2621 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2622 | ||
2623 | if (it->current.overlay_string_index && i == 0) | |
2624 | load_overlay_strings (it); | |
2625 | ||
2626 | /* Initialize IT to deliver display elements from the overlay | |
2627 | string. */ | |
2628 | it->string = it->overlay_strings[i]; | |
2629 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2630 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2631 | it->method = next_element_from_string; | |
2632 | it->stop_charpos = 0; | |
2633 | } | |
2634 | ||
2635 | CHECK_IT (it); | |
2636 | } | |
2637 | ||
2638 | ||
2639 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2640 | comparison function for qsort in load_overlay_strings. Overlay | |
2641 | strings for the same position are sorted so that | |
2642 | ||
2643 | 1. All after-strings come in front of before-strings. | |
2644 | ||
2645 | 2. Within after-strings, strings are sorted so that overlay strings | |
2646 | from overlays with higher priorities come first. | |
2647 | ||
2648 | 2. Within before-strings, strings are sorted so that overlay | |
2649 | strings from overlays with higher priorities come last. | |
2650 | ||
2651 | Value is analogous to strcmp. */ | |
2652 | ||
2653 | ||
2654 | static int | |
2655 | compare_overlay_entries (e1, e2) | |
2656 | void *e1, *e2; | |
2657 | { | |
2658 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2659 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2660 | int result; | |
2661 | ||
2662 | if (entry1->after_string_p != entry2->after_string_p) | |
2663 | /* Let after-strings appear in front of before-strings. */ | |
2664 | result = entry1->after_string_p ? -1 : 1; | |
2665 | else if (entry1->after_string_p) | |
2666 | /* After-strings sorted in order of decreasing priority. */ | |
2667 | result = entry2->priority - entry1->priority; | |
2668 | else | |
2669 | /* Before-strings sorted in order of increasing priority. */ | |
2670 | result = entry1->priority - entry2->priority; | |
2671 | ||
2672 | return result; | |
2673 | } | |
2674 | ||
2675 | ||
2676 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2677 | current buffer position. Set IT->n_overlays to the total number of | |
2678 | overlay strings found. | |
2679 | ||
2680 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2681 | a time. On entry into load_overlay_strings, | |
2682 | IT->current.overlay_string_index gives the number of overlay | |
2683 | strings that have already been loaded by previous calls to this | |
2684 | function. | |
2685 | ||
2686 | Overlay strings are sorted so that after-string strings come in | |
2687 | front of before-string strings. Within before and after-strings, | |
2688 | strings are sorted by overlay priority. See also function | |
2689 | compare_overlay_entries. */ | |
2690 | ||
2691 | static void | |
2692 | load_overlay_strings (it) | |
2693 | struct it *it; | |
2694 | { | |
2695 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2696 | Lisp_Object ov, overlay, window, str; | |
2697 | int start, end; | |
2698 | int size = 20; | |
2699 | int n = 0, i, j; | |
2700 | struct overlay_entry *entries | |
2701 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2702 | ||
2703 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2704 | `entries' which has size `size' and currently contains `n' | |
2705 | elements. AFTER_P non-zero means STRING is an after-string of | |
2706 | OVERLAY. */ | |
2707 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2708 | do \ | |
2709 | { \ | |
2710 | Lisp_Object priority; \ | |
2711 | \ | |
2712 | if (n == size) \ | |
2713 | { \ | |
2714 | int new_size = 2 * size; \ | |
2715 | struct overlay_entry *old = entries; \ | |
2716 | entries = \ | |
2717 | (struct overlay_entry *) alloca (new_size \ | |
2718 | * sizeof *entries); \ | |
2719 | bcopy (old, entries, size * sizeof *entries); \ | |
2720 | size = new_size; \ | |
2721 | } \ | |
2722 | \ | |
2723 | entries[n].string = (STRING); \ | |
2724 | priority = Foverlay_get ((OVERLAY), Qpriority); \ | |
2725 | entries[n].priority \ | |
2726 | = INTEGERP (priority) ? XFASTINT (priority) : 0; \ | |
2727 | entries[n].after_string_p = (AFTER_P); \ | |
2728 | ++n; \ | |
2729 | } \ | |
2730 | while (0) | |
2731 | ||
2732 | /* Process overlay before the overlay center. */ | |
2733 | for (ov = current_buffer->overlays_before; | |
2734 | CONSP (ov); | |
2735 | ov = XCONS (ov)->cdr) | |
2736 | { | |
2737 | overlay = XCONS (ov)->car; | |
2738 | xassert (OVERLAYP (overlay)); | |
2739 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2740 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2741 | ||
2742 | if (end < IT_CHARPOS (*it)) | |
2743 | break; | |
2744 | ||
2745 | /* Skip this overlay if it doesn't start or end at IT's current | |
2746 | position. */ | |
2747 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2748 | continue; | |
2749 | ||
2750 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2751 | window = Foverlay_get (overlay, Qwindow); | |
2752 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2753 | continue; | |
2754 | ||
2755 | /* If overlay has a non-empty before-string, record it. */ | |
2756 | if (start == IT_CHARPOS (*it) | |
2757 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2758 | && XSTRING (str)->size) | |
2759 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2760 | ||
2761 | /* If overlay has a non-empty after-string, record it. */ | |
2762 | if (end == IT_CHARPOS (*it) | |
2763 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2764 | && XSTRING (str)->size) | |
2765 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2766 | } | |
2767 | ||
2768 | /* Process overlays after the overlay center. */ | |
2769 | for (ov = current_buffer->overlays_after; | |
2770 | CONSP (ov); | |
2771 | ov = XCONS (ov)->cdr) | |
2772 | { | |
2773 | overlay = XCONS (ov)->car; | |
2774 | xassert (OVERLAYP (overlay)); | |
2775 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2776 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2777 | ||
2778 | if (start > IT_CHARPOS (*it)) | |
2779 | break; | |
2780 | ||
2781 | /* Skip this overlay if it doesn't start or end at IT's current | |
2782 | position. */ | |
2783 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2784 | continue; | |
2785 | ||
2786 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2787 | window = Foverlay_get (overlay, Qwindow); | |
2788 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2789 | continue; | |
2790 | ||
2791 | /* If overlay has a non-empty before-string, record it. */ | |
2792 | if (start == IT_CHARPOS (*it) | |
2793 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2794 | && XSTRING (str)->size) | |
2795 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2796 | ||
2797 | /* If overlay has a non-empty after-string, record it. */ | |
2798 | if (end == IT_CHARPOS (*it) | |
2799 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2800 | && XSTRING (str)->size) | |
2801 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2802 | } | |
2803 | ||
2804 | #undef RECORD_OVERLAY_STRING | |
2805 | ||
2806 | /* Sort entries. */ | |
2807 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
2808 | ||
2809 | /* Record the total number of strings to process. */ | |
2810 | it->n_overlay_strings = n; | |
2811 | ||
2812 | /* IT->current.overlay_string_index is the number of overlay strings | |
2813 | that have already been consumed by IT. Copy some of the | |
2814 | remaining overlay strings to IT->overlay_strings. */ | |
2815 | i = 0; | |
2816 | j = it->current.overlay_string_index; | |
2817 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
2818 | it->overlay_strings[i++] = entries[j++].string; | |
2819 | ||
2820 | CHECK_IT (it); | |
2821 | } | |
2822 | ||
2823 | ||
2824 | /* Get the first chunk of overlay strings at IT's current buffer | |
2825 | position. Value is non-zero if at least one overlay string was | |
2826 | found. */ | |
2827 | ||
2828 | static int | |
2829 | get_overlay_strings (it) | |
2830 | struct it *it; | |
2831 | { | |
2832 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
2833 | process. This fills IT->overlay_strings with strings, and sets | |
2834 | IT->n_overlay_strings to the total number of strings to process. | |
2835 | IT->pos.overlay_string_index has to be set temporarily to zero | |
2836 | because load_overlay_strings needs this; it must be set to -1 | |
2837 | when no overlay strings are found because a zero value would | |
2838 | indicate a position in the first overlay string. */ | |
2839 | it->current.overlay_string_index = 0; | |
2840 | load_overlay_strings (it); | |
2841 | ||
2842 | /* If we found overlay strings, set up IT to deliver display | |
2843 | elements from the first one. Otherwise set up IT to deliver | |
2844 | from current_buffer. */ | |
2845 | if (it->n_overlay_strings) | |
2846 | { | |
2847 | /* Make sure we know settings in current_buffer, so that we can | |
2848 | restore meaningful values when we're done with the overlay | |
2849 | strings. */ | |
2850 | compute_stop_pos (it); | |
2851 | xassert (it->face_id >= 0); | |
2852 | ||
2853 | /* Save IT's settings. They are restored after all overlay | |
2854 | strings have been processed. */ | |
2855 | xassert (it->sp == 0); | |
2856 | push_it (it); | |
2857 | ||
2858 | /* Set up IT to deliver display elements from the first overlay | |
2859 | string. */ | |
2860 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2861 | it->stop_charpos = 0; | |
2862 | it->string = it->overlay_strings[0]; | |
2863 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2864 | xassert (STRINGP (it->string)); | |
2865 | it->method = next_element_from_string; | |
2866 | } | |
2867 | else | |
2868 | { | |
2869 | it->string = Qnil; | |
2870 | it->current.overlay_string_index = -1; | |
2871 | it->method = next_element_from_buffer; | |
2872 | } | |
2873 | ||
2874 | CHECK_IT (it); | |
2875 | ||
2876 | /* Value is non-zero if we found at least one overlay string. */ | |
2877 | return STRINGP (it->string); | |
2878 | } | |
2879 | ||
2880 | ||
2881 | \f | |
2882 | /*********************************************************************** | |
2883 | Saving and restoring state | |
2884 | ***********************************************************************/ | |
2885 | ||
2886 | /* Save current settings of IT on IT->stack. Called, for example, | |
2887 | before setting up IT for an overlay string, to be able to restore | |
2888 | IT's settings to what they were after the overlay string has been | |
2889 | processed. */ | |
2890 | ||
2891 | static void | |
2892 | push_it (it) | |
2893 | struct it *it; | |
2894 | { | |
2895 | struct iterator_stack_entry *p; | |
2896 | ||
2897 | xassert (it->sp < 2); | |
2898 | p = it->stack + it->sp; | |
2899 | ||
2900 | p->stop_charpos = it->stop_charpos; | |
2901 | xassert (it->face_id >= 0); | |
2902 | p->face_id = it->face_id; | |
2903 | p->string = it->string; | |
2904 | p->pos = it->current; | |
2905 | p->end_charpos = it->end_charpos; | |
2906 | p->string_nchars = it->string_nchars; | |
2907 | p->area = it->area; | |
2908 | p->multibyte_p = it->multibyte_p; | |
2909 | p->space_width = it->space_width; | |
2910 | p->font_height = it->font_height; | |
2911 | p->voffset = it->voffset; | |
2912 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
2913 | ++it->sp; | |
2914 | } | |
2915 | ||
2916 | ||
2917 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
2918 | more overlay strings must be processed, and we return to delivering | |
2919 | display elements from a buffer, or when the end of a string from a | |
2920 | `display' property is reached and we return to delivering display | |
2921 | elements from an overlay string, or from a buffer. */ | |
2922 | ||
2923 | static void | |
2924 | pop_it (it) | |
2925 | struct it *it; | |
2926 | { | |
2927 | struct iterator_stack_entry *p; | |
2928 | ||
2929 | xassert (it->sp > 0); | |
2930 | --it->sp; | |
2931 | p = it->stack + it->sp; | |
2932 | it->stop_charpos = p->stop_charpos; | |
2933 | it->face_id = p->face_id; | |
2934 | it->string = p->string; | |
2935 | it->current = p->pos; | |
2936 | it->end_charpos = p->end_charpos; | |
2937 | it->string_nchars = p->string_nchars; | |
2938 | it->area = p->area; | |
2939 | it->multibyte_p = p->multibyte_p; | |
2940 | it->space_width = p->space_width; | |
2941 | it->font_height = p->font_height; | |
2942 | it->voffset = p->voffset; | |
2943 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
2944 | } | |
2945 | ||
2946 | ||
2947 | \f | |
2948 | /*********************************************************************** | |
2949 | Moving over lines | |
2950 | ***********************************************************************/ | |
2951 | ||
2952 | /* Set IT's current position to the previous line start. */ | |
2953 | ||
2954 | static void | |
2955 | back_to_previous_line_start (it) | |
2956 | struct it *it; | |
2957 | { | |
2958 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
2959 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2960 | } | |
2961 | ||
2962 | ||
2963 | /* Set IT's current position to the next line start. */ | |
2964 | ||
2965 | static void | |
2966 | forward_to_next_line_start (it) | |
2967 | struct it *it; | |
2968 | { | |
2969 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
2970 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2971 | } | |
2972 | ||
2973 | ||
2974 | /* Set IT's current position to the previous visible line start. Skip | |
2975 | invisible text that is so either due to text properties or due to | |
2976 | selective display. Caution: this does not change IT->current_x and | |
2977 | IT->hpos. */ | |
2978 | ||
2979 | static void | |
2980 | back_to_previous_visible_line_start (it) | |
2981 | struct it *it; | |
2982 | { | |
2983 | int visible_p = 0; | |
2984 | ||
2985 | /* Go back one newline if not on BEGV already. */ | |
2986 | if (IT_CHARPOS (*it) > BEGV) | |
2987 | back_to_previous_line_start (it); | |
2988 | ||
2989 | /* Move over lines that are invisible because of selective display | |
2990 | or text properties. */ | |
2991 | while (IT_CHARPOS (*it) > BEGV | |
2992 | && !visible_p) | |
2993 | { | |
2994 | visible_p = 1; | |
2995 | ||
2996 | /* If selective > 0, then lines indented more than that values | |
2997 | are invisible. */ | |
2998 | if (it->selective > 0 | |
2999 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3000 | it->selective)) | |
3001 | visible_p = 0; | |
3002 | #ifdef USE_TEXT_PROPERTIES | |
3003 | else | |
3004 | { | |
3005 | Lisp_Object prop; | |
3006 | ||
3007 | prop = Fget_char_property (IT_CHARPOS (*it), Qinvisible, it->window); | |
3008 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
3009 | visible_p = 0; | |
3010 | } | |
3011 | #endif /* USE_TEXT_PROPERTIES */ | |
3012 | ||
3013 | /* Back one more newline if the current one is invisible. */ | |
3014 | if (!visible_p) | |
3015 | back_to_previous_line_start (it); | |
3016 | } | |
3017 | ||
3018 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3019 | xassert (IT_CHARPOS (*it) == BEGV | |
3020 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3021 | CHECK_IT (it); | |
3022 | } | |
3023 | ||
3024 | ||
3025 | /* Reseat iterator IT at the previous visible line start. Skip | |
3026 | invisible text that is so either due to text properties or due to | |
3027 | selective display. At the end, update IT's overlay information, | |
3028 | face information etc. */ | |
3029 | ||
3030 | static void | |
3031 | reseat_at_previous_visible_line_start (it) | |
3032 | struct it *it; | |
3033 | { | |
3034 | back_to_previous_visible_line_start (it); | |
3035 | reseat (it, it->current.pos, 1); | |
3036 | CHECK_IT (it); | |
3037 | } | |
3038 | ||
3039 | ||
3040 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3041 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3042 | preceding the line start. Skip over invisible text that is so | |
3043 | because of selective display. Compute faces, overlays etc at the | |
3044 | new position. Note that this function does not skip over text that | |
3045 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3046 | |
3047 | static void | |
312246d1 | 3048 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3049 | struct it *it; |
312246d1 | 3050 | int on_newline_p; |
5f5c8ee5 GM |
3051 | { |
3052 | /* Restore the buffer position when currently not delivering display | |
3053 | elements from the current buffer. This is the case, for example, | |
3054 | when called at the end of a truncated overlay string. */ | |
3055 | while (it->sp) | |
3056 | pop_it (it); | |
3057 | it->method = next_element_from_buffer; | |
3058 | ||
3059 | /* Otherwise, scan_buffer would not work. */ | |
3060 | if (IT_CHARPOS (*it) < ZV) | |
3061 | { | |
3062 | /* If on a newline, advance past it. Otherwise, find the next | |
3063 | newline which automatically gives us the position following | |
3064 | the newline. */ | |
3065 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3066 | { | |
3067 | ++IT_CHARPOS (*it); | |
3068 | ++IT_BYTEPOS (*it); | |
3069 | } | |
3070 | else | |
3071 | forward_to_next_line_start (it); | |
3072 | ||
3073 | /* We must either have reached the end of the buffer or end up | |
3074 | after a newline. */ | |
3075 | xassert (IT_CHARPOS (*it) == ZV | |
3076 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3077 | ||
3078 | /* Skip over lines that are invisible because they are indented | |
3079 | more than the value of IT->selective. */ | |
3080 | if (it->selective > 0) | |
3081 | while (IT_CHARPOS (*it) < ZV | |
3082 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3083 | it->selective)) | |
3084 | forward_to_next_line_start (it); | |
312246d1 GM |
3085 | |
3086 | /* Position on the newline if we should. */ | |
3087 | if (on_newline_p && IT_CHARPOS (*it) > BEGV) | |
3088 | { | |
3089 | --IT_CHARPOS (*it); | |
3090 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3091 | } | |
5f5c8ee5 GM |
3092 | |
3093 | /* Set the iterator there. The 0 as the last parameter of | |
3094 | reseat means don't force a text property lookup. The lookup | |
3095 | is then only done if we've skipped past the iterator's | |
3096 | check_charpos'es. This optimization is important because | |
3097 | text property lookups tend to be expensive. */ | |
3098 | reseat (it, it->current.pos, 0); | |
3099 | } | |
3100 | ||
3101 | CHECK_IT (it); | |
3102 | } | |
3103 | ||
3104 | ||
3105 | \f | |
3106 | /*********************************************************************** | |
3107 | Changing an iterator's position | |
3108 | ***********************************************************************/ | |
3109 | ||
3110 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3111 | is non-zero, always check for text properties at the new position. | |
3112 | Otherwise, text properties are only looked up if POS >= | |
3113 | IT->check_charpos of a property. */ | |
3114 | ||
3115 | static void | |
3116 | reseat (it, pos, force_p) | |
3117 | struct it *it; | |
3118 | struct text_pos pos; | |
3119 | int force_p; | |
3120 | { | |
3121 | int original_pos = IT_CHARPOS (*it); | |
3122 | ||
3123 | reseat_1 (it, pos, 0); | |
3124 | ||
3125 | /* Determine where to check text properties. Avoid doing it | |
3126 | where possible because text property lookup is very expensive. */ | |
3127 | if (force_p | |
3128 | || CHARPOS (pos) > it->stop_charpos | |
3129 | || CHARPOS (pos) < original_pos) | |
3130 | handle_stop (it); | |
3131 | ||
3132 | CHECK_IT (it); | |
3133 | } | |
3134 | ||
3135 | ||
3136 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3137 | IT->stop_pos to POS, also. */ | |
3138 | ||
3139 | static void | |
3140 | reseat_1 (it, pos, set_stop_p) | |
3141 | struct it *it; | |
3142 | struct text_pos pos; | |
3143 | int set_stop_p; | |
3144 | { | |
3145 | /* Don't call this function when scanning a C string. */ | |
3146 | xassert (it->s == NULL); | |
3147 | ||
3148 | /* POS must be a reasonable value. */ | |
3149 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3150 | ||
3151 | it->current.pos = it->position = pos; | |
3152 | XSETBUFFER (it->object, current_buffer); | |
3153 | it->dpvec = NULL; | |
3154 | it->current.dpvec_index = -1; | |
3155 | it->current.overlay_string_index = -1; | |
3156 | IT_STRING_CHARPOS (*it) = -1; | |
3157 | IT_STRING_BYTEPOS (*it) = -1; | |
3158 | it->string = Qnil; | |
3159 | it->method = next_element_from_buffer; | |
3160 | it->sp = 0; | |
3161 | ||
3162 | if (set_stop_p) | |
3163 | it->stop_charpos = CHARPOS (pos); | |
3164 | } | |
3165 | ||
3166 | ||
3167 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3168 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3169 | STRING gives a Lisp string to iterate over. | |
3170 | ||
3171 | If PRECISION > 0, don't return more then PRECISION number of | |
3172 | characters from the string. | |
3173 | ||
3174 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3175 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3176 | field width. | |
3177 | ||
3178 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3179 | MULTIBYTE > 0 means enable it, | |
3180 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3181 | ||
3182 | IT must be initialized via a prior call to init_iterator before | |
3183 | calling this function. */ | |
3184 | ||
3185 | static void | |
3186 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3187 | struct it *it; | |
3188 | unsigned char *s; | |
3189 | Lisp_Object string; | |
3190 | int charpos; | |
3191 | int precision, field_width, multibyte; | |
3192 | { | |
3193 | /* No region in strings. */ | |
3194 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3195 | ||
3196 | /* No text property checks performed by default, but see below. */ | |
3197 | it->stop_charpos = -1; | |
3198 | ||
3199 | /* Set iterator position and end position. */ | |
3200 | bzero (&it->current, sizeof it->current); | |
3201 | it->current.overlay_string_index = -1; | |
3202 | it->current.dpvec_index = -1; | |
3203 | it->charset = CHARSET_ASCII; | |
3204 | xassert (charpos >= 0); | |
3205 | ||
3206 | /* Use the setting of MULTIBYTE if specified. */ | |
3207 | if (multibyte >= 0) | |
3208 | it->multibyte_p = multibyte > 0; | |
3209 | ||
3210 | if (s == NULL) | |
3211 | { | |
3212 | xassert (STRINGP (string)); | |
3213 | it->string = string; | |
3214 | it->s = NULL; | |
3215 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3216 | it->method = next_element_from_string; | |
3217 | it->current.string_pos = string_pos (charpos, string); | |
3218 | } | |
3219 | else | |
3220 | { | |
3221 | it->s = s; | |
3222 | it->string = Qnil; | |
3223 | ||
3224 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3225 | for displaying C strings. */ | |
3226 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3227 | if (it->multibyte_p) | |
3228 | { | |
3229 | it->current.pos = c_string_pos (charpos, s, 1); | |
3230 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3231 | } | |
3232 | else | |
3233 | { | |
3234 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3235 | it->end_charpos = it->string_nchars = strlen (s); | |
3236 | } | |
3237 | ||
3238 | it->method = next_element_from_c_string; | |
3239 | } | |
3240 | ||
3241 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3242 | from the string. */ | |
3243 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3244 | it->end_charpos = it->string_nchars = charpos + precision; | |
3245 | ||
3246 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3247 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3248 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3249 | padding with `-' at the end of a mode line. */ | |
3250 | if (field_width < 0) | |
3251 | field_width = INFINITY; | |
3252 | if (field_width > it->end_charpos - charpos) | |
3253 | it->end_charpos = charpos + field_width; | |
3254 | ||
3255 | /* Use the standard display table for displaying strings. */ | |
3256 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3257 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3258 | ||
3259 | it->stop_charpos = charpos; | |
3260 | CHECK_IT (it); | |
3261 | } | |
3262 | ||
3263 | ||
3264 | \f | |
3265 | /*********************************************************************** | |
3266 | Iteration | |
3267 | ***********************************************************************/ | |
3268 | ||
3269 | /* Load IT's display element fields with information about the next | |
3270 | display element from the current position of IT. Value is zero if | |
3271 | end of buffer (or C string) is reached. */ | |
3272 | ||
3273 | int | |
3274 | get_next_display_element (it) | |
3275 | struct it *it; | |
3276 | { | |
3277 | /* Non-zero means that we found an display element. Zero means that | |
3278 | we hit the end of what we iterate over. Performance note: the | |
3279 | function pointer `method' used here turns out to be faster than | |
3280 | using a sequence of if-statements. */ | |
3281 | int success_p = (*it->method) (it); | |
3282 | int charset; | |
3283 | ||
3284 | if (it->what == IT_CHARACTER) | |
3285 | { | |
3286 | /* Map via display table or translate control characters. | |
3287 | IT->c, IT->len etc. have been set to the next character by | |
3288 | the function call above. If we have a display table, and it | |
3289 | contains an entry for IT->c, translate it. Don't do this if | |
3290 | IT->c itself comes from a display table, otherwise we could | |
3291 | end up in an infinite recursion. (An alternative could be to | |
3292 | count the recursion depth of this function and signal an | |
3293 | error when a certain maximum depth is reached.) Is it worth | |
3294 | it? */ | |
3295 | if (success_p && it->dpvec == NULL) | |
3296 | { | |
3297 | Lisp_Object dv; | |
3298 | ||
3299 | if (it->dp | |
3300 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3301 | VECTORP (dv))) | |
3302 | { | |
3303 | struct Lisp_Vector *v = XVECTOR (dv); | |
3304 | ||
3305 | /* Return the first character from the display table | |
3306 | entry, if not empty. If empty, don't display the | |
3307 | current character. */ | |
3308 | if (v->size) | |
3309 | { | |
3310 | it->dpvec_char_len = it->len; | |
3311 | it->dpvec = v->contents; | |
3312 | it->dpend = v->contents + v->size; | |
3313 | it->current.dpvec_index = 0; | |
3314 | it->method = next_element_from_display_vector; | |
3315 | } | |
3316 | ||
3317 | success_p = get_next_display_element (it); | |
3318 | } | |
3319 | ||
3320 | /* Translate control characters into `\003' or `^C' form. | |
3321 | Control characters coming from a display table entry are | |
3322 | currently not translated because we use IT->dpvec to hold | |
3323 | the translation. This could easily be changed but I | |
3324 | don't believe that it is worth doing. */ | |
3325 | else if ((it->c < ' ' | |
3326 | && (it->area != TEXT_AREA | |
3327 | || (it->c != '\n' | |
3328 | && it->c != '\t' | |
3329 | && it->c != '\r'))) | |
54c85a23 | 3330 | || (it->c >= 127 |
5f5c8ee5 GM |
3331 | && it->len == 1)) |
3332 | { | |
3333 | /* IT->c is a control character which must be displayed | |
3334 | either as '\003' or as `^C' where the '\\' and '^' | |
3335 | can be defined in the display table. Fill | |
3336 | IT->ctl_chars with glyphs for what we have to | |
3337 | display. Then, set IT->dpvec to these glyphs. */ | |
3338 | GLYPH g; | |
3339 | ||
54c85a23 | 3340 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3341 | { |
3342 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3343 | if (it->dp | |
3344 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3345 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3346 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3347 | else | |
3348 | g = FAST_MAKE_GLYPH ('^', 0); | |
3349 | XSETINT (it->ctl_chars[0], g); | |
3350 | ||
3351 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3352 | XSETINT (it->ctl_chars[1], g); | |
3353 | ||
3354 | /* Set up IT->dpvec and return first character from it. */ | |
3355 | it->dpvec_char_len = it->len; | |
3356 | it->dpvec = it->ctl_chars; | |
3357 | it->dpend = it->dpvec + 2; | |
3358 | it->current.dpvec_index = 0; | |
3359 | it->method = next_element_from_display_vector; | |
3360 | get_next_display_element (it); | |
3361 | } | |
3362 | else | |
3363 | { | |
3364 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ | |
3365 | if (it->dp | |
3366 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3367 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
3368 | g = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); | |
3369 | else | |
3370 | g = FAST_MAKE_GLYPH ('\\', 0); | |
3371 | XSETINT (it->ctl_chars[0], g); | |
3372 | ||
3373 | /* Insert three more glyphs into IT->ctl_chars for | |
3374 | the octal display of the character. */ | |
3375 | g = FAST_MAKE_GLYPH (((it->c >> 6) & 7) + '0', 0); | |
3376 | XSETINT (it->ctl_chars[1], g); | |
3377 | g = FAST_MAKE_GLYPH (((it->c >> 3) & 7) + '0', 0); | |
3378 | XSETINT (it->ctl_chars[2], g); | |
3379 | g = FAST_MAKE_GLYPH ((it->c & 7) + '0', 0); | |
3380 | XSETINT (it->ctl_chars[3], g); | |
3381 | ||
3382 | /* Set up IT->dpvec and return the first character | |
3383 | from it. */ | |
3384 | it->dpvec_char_len = it->len; | |
3385 | it->dpvec = it->ctl_chars; | |
3386 | it->dpend = it->dpvec + 4; | |
3387 | it->current.dpvec_index = 0; | |
3388 | it->method = next_element_from_display_vector; | |
3389 | get_next_display_element (it); | |
3390 | } | |
3391 | } | |
3392 | } | |
3393 | ||
3394 | /* Adjust face id if charset changes. There are no charset | |
3395 | changes in unibyte text because Emacs' charsets are not | |
3396 | applicable there. */ | |
3397 | if (it->multibyte_p | |
3398 | && success_p | |
3399 | && (charset = CHAR_CHARSET (it->c), | |
3400 | charset != it->charset)) | |
3401 | { | |
3402 | it->charset = charset; | |
3403 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, charset); | |
3404 | } | |
3405 | } | |
3406 | ||
3407 | /* Is this character the last one of a run of characters with | |
3408 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3409 | if (it->face_box_p | |
3410 | && it->s == NULL) | |
3411 | { | |
3412 | int face_id; | |
3413 | struct face *face; | |
3414 | ||
3415 | it->end_of_box_run_p | |
3416 | = ((face_id = face_after_it_pos (it), | |
3417 | face_id != it->face_id) | |
3418 | && (face = FACE_FROM_ID (it->f, face_id), | |
3419 | face->box == FACE_NO_BOX)); | |
3420 | } | |
3421 | ||
3422 | /* Value is 0 if end of buffer or string reached. */ | |
3423 | return success_p; | |
3424 | } | |
3425 | ||
3426 | ||
3427 | /* Move IT to the next display element. | |
3428 | ||
3429 | Functions get_next_display_element and set_iterator_to_next are | |
3430 | separate because I find this arrangement easier to handle than a | |
3431 | get_next_display_element function that also increments IT's | |
3432 | position. The way it is we can first look at an iterator's current | |
3433 | display element, decide whether it fits on a line, and if it does, | |
3434 | increment the iterator position. The other way around we probably | |
3435 | would either need a flag indicating whether the iterator has to be | |
3436 | incremented the next time, or we would have to implement a | |
3437 | decrement position function which would not be easy to write. */ | |
3438 | ||
3439 | void | |
3440 | set_iterator_to_next (it) | |
3441 | struct it *it; | |
3442 | { | |
3443 | if (it->method == next_element_from_buffer) | |
3444 | { | |
3445 | /* The current display element of IT is a character from | |
3446 | current_buffer. Advance in the buffer, and maybe skip over | |
3447 | invisible lines that are so because of selective display. */ | |
3448 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3449 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3450 | else |
3451 | { | |
3452 | xassert (it->len != 0); | |
3453 | IT_BYTEPOS (*it) += it->len; | |
3454 | IT_CHARPOS (*it) += 1; | |
3455 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3456 | } | |
3457 | } | |
3458 | else if (it->method == next_element_from_c_string) | |
3459 | { | |
3460 | /* Current display element of IT is from a C string. */ | |
3461 | IT_BYTEPOS (*it) += it->len; | |
3462 | IT_CHARPOS (*it) += 1; | |
3463 | } | |
3464 | else if (it->method == next_element_from_display_vector) | |
3465 | { | |
3466 | /* Current display element of IT is from a display table entry. | |
3467 | Advance in the display table definition. Reset it to null if | |
3468 | end reached, and continue with characters from buffers/ | |
3469 | strings. */ | |
286bcbc9 GM |
3470 | struct face *face; |
3471 | ||
5f5c8ee5 | 3472 | ++it->current.dpvec_index; |
286bcbc9 GM |
3473 | |
3474 | /* Restore face and charset of the iterator to what they were | |
3475 | before the display vector entry (these entries may contain | |
3476 | faces, and of course characters of different charsets). */ | |
5f5c8ee5 | 3477 | it->face_id = it->saved_face_id; |
286bcbc9 GM |
3478 | it->charset = FACE_FROM_ID (it->f, it->face_id)->charset; |
3479 | ||
5f5c8ee5 GM |
3480 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3481 | { | |
3482 | if (it->s) | |
3483 | it->method = next_element_from_c_string; | |
3484 | else if (STRINGP (it->string)) | |
3485 | it->method = next_element_from_string; | |
3486 | else | |
3487 | it->method = next_element_from_buffer; | |
3488 | ||
3489 | it->dpvec = NULL; | |
3490 | it->current.dpvec_index = -1; | |
3491 | ||
312246d1 GM |
3492 | /* Skip over characters which were displayed via IT->dpvec. */ |
3493 | if (it->dpvec_char_len < 0) | |
3494 | reseat_at_next_visible_line_start (it, 1); | |
3495 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3496 | { |
3497 | it->len = it->dpvec_char_len; | |
3498 | set_iterator_to_next (it); | |
3499 | } | |
3500 | } | |
3501 | } | |
3502 | else if (it->method == next_element_from_string) | |
3503 | { | |
3504 | /* Current display element is a character from a Lisp string. */ | |
3505 | xassert (it->s == NULL && STRINGP (it->string)); | |
3506 | IT_STRING_BYTEPOS (*it) += it->len; | |
3507 | IT_STRING_CHARPOS (*it) += 1; | |
3508 | ||
3509 | consider_string_end: | |
3510 | ||
3511 | if (it->current.overlay_string_index >= 0) | |
3512 | { | |
3513 | /* IT->string is an overlay string. Advance to the | |
3514 | next, if there is one. */ | |
3515 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3516 | next_overlay_string (it); | |
3517 | } | |
3518 | else | |
3519 | { | |
3520 | /* IT->string is not an overlay string. If we reached | |
3521 | its end, and there is something on IT->stack, proceed | |
3522 | with what is on the stack. This can be either another | |
3523 | string, this time an overlay string, or a buffer. */ | |
3524 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3525 | && it->sp > 0) | |
3526 | { | |
3527 | pop_it (it); | |
3528 | if (!STRINGP (it->string)) | |
3529 | it->method = next_element_from_buffer; | |
3530 | } | |
3531 | } | |
3532 | } | |
3533 | else if (it->method == next_element_from_image | |
3534 | || it->method == next_element_from_stretch) | |
3535 | { | |
3536 | /* The position etc with which we have to proceed are on | |
3537 | the stack. The position may be at the end of a string, | |
3538 | if the `display' property takes up the whole string. */ | |
3539 | pop_it (it); | |
3540 | it->image_id = 0; | |
3541 | if (STRINGP (it->string)) | |
3542 | { | |
3543 | it->method = next_element_from_string; | |
3544 | goto consider_string_end; | |
3545 | } | |
3546 | else | |
3547 | it->method = next_element_from_buffer; | |
3548 | } | |
3549 | else | |
3550 | /* There are no other methods defined, so this should be a bug. */ | |
3551 | abort (); | |
3552 | ||
3553 | /* Reset flags indicating start and end of a sequence of | |
3554 | characters with box. */ | |
3555 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3556 | ||
3557 | xassert (it->method != next_element_from_string | |
3558 | || (STRINGP (it->string) | |
3559 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3560 | } | |
3561 | ||
3562 | ||
3563 | /* Load IT's display element fields with information about the next | |
3564 | display element which comes from a display table entry or from the | |
3565 | result of translating a control character to one of the forms `^C' | |
3566 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3567 | ||
3568 | static int | |
3569 | next_element_from_display_vector (it) | |
3570 | struct it *it; | |
3571 | { | |
3572 | /* Precondition. */ | |
3573 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3574 | ||
3575 | /* Remember the current face id in case glyphs specify faces. | |
3576 | IT's face is restored in set_iterator_to_next. */ | |
3577 | it->saved_face_id = it->face_id; | |
3578 | ||
3579 | if (INTEGERP (*it->dpvec) | |
3580 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3581 | { | |
3582 | int lface_id; | |
3583 | GLYPH g; | |
3584 | ||
3585 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3586 | it->c = FAST_GLYPH_CHAR (g); | |
3587 | it->len = CHAR_LEN (it->c); | |
3588 | ||
3589 | /* The entry may contain a face id to use. Such a face id is | |
3590 | the id of a Lisp face, not a realized face. A face id of | |
3591 | zero means no face. */ | |
3592 | lface_id = FAST_GLYPH_FACE (g); | |
3593 | if (lface_id) | |
3594 | { | |
3595 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); | |
3596 | if (face_id >= 0) | |
3597 | { | |
3598 | it->face_id = face_id; | |
3599 | it->charset = CHARSET_ASCII; | |
3600 | } | |
3601 | } | |
3602 | } | |
3603 | else | |
3604 | /* Display table entry is invalid. Return a space. */ | |
3605 | it->c = ' ', it->len = 1; | |
3606 | ||
3607 | /* Don't change position and object of the iterator here. They are | |
3608 | still the values of the character that had this display table | |
3609 | entry or was translated, and that's what we want. */ | |
3610 | it->what = IT_CHARACTER; | |
3611 | return 1; | |
3612 | } | |
3613 | ||
3614 | ||
3615 | /* Load IT with the next display element from Lisp string IT->string. | |
3616 | IT->current.string_pos is the current position within the string. | |
3617 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3618 | overlay string. */ | |
3619 | ||
3620 | static int | |
3621 | next_element_from_string (it) | |
3622 | struct it *it; | |
3623 | { | |
3624 | struct text_pos position; | |
3625 | ||
3626 | xassert (STRINGP (it->string)); | |
3627 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3628 | position = it->current.string_pos; | |
3629 | ||
3630 | /* Time to check for invisible text? */ | |
3631 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3632 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3633 | { | |
3634 | handle_stop (it); | |
3635 | ||
3636 | /* Since a handler may have changed IT->method, we must | |
3637 | recurse here. */ | |
3638 | return get_next_display_element (it); | |
3639 | } | |
3640 | ||
3641 | if (it->current.overlay_string_index >= 0) | |
3642 | { | |
3643 | /* Get the next character from an overlay string. In overlay | |
3644 | strings, There is no field width or padding with spaces to | |
3645 | do. */ | |
3646 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3647 | { | |
3648 | it->what = IT_EOB; | |
3649 | return 0; | |
3650 | } | |
3651 | else if (STRING_MULTIBYTE (it->string)) | |
3652 | { | |
3653 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3654 | - IT_STRING_BYTEPOS (*it)); | |
3655 | unsigned char *s = (XSTRING (it->string)->data | |
3656 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3657 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3658 | } |
3659 | else | |
3660 | { | |
3661 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3662 | it->len = 1; | |
3663 | } | |
3664 | } | |
3665 | else | |
3666 | { | |
3667 | /* Get the next character from a Lisp string that is not an | |
3668 | overlay string. Such strings come from the mode line, for | |
3669 | example. We may have to pad with spaces, or truncate the | |
3670 | string. See also next_element_from_c_string. */ | |
3671 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3672 | { | |
3673 | it->what = IT_EOB; | |
3674 | return 0; | |
3675 | } | |
3676 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3677 | { | |
3678 | /* Pad with spaces. */ | |
3679 | it->c = ' ', it->len = 1; | |
3680 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3681 | } | |
3682 | else if (STRING_MULTIBYTE (it->string)) | |
3683 | { | |
3684 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3685 | - IT_STRING_BYTEPOS (*it)); | |
3686 | unsigned char *s = (XSTRING (it->string)->data | |
3687 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3688 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3689 | } |
3690 | else | |
3691 | { | |
3692 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3693 | it->len = 1; | |
3694 | } | |
3695 | } | |
3696 | ||
3697 | /* Record what we have and where it came from. Note that we store a | |
3698 | buffer position in IT->position although it could arguably be a | |
3699 | string position. */ | |
3700 | it->what = IT_CHARACTER; | |
3701 | it->object = it->string; | |
3702 | it->position = position; | |
3703 | return 1; | |
3704 | } | |
3705 | ||
3706 | ||
3707 | /* Load IT with next display element from C string IT->s. | |
3708 | IT->string_nchars is the maximum number of characters to return | |
3709 | from the string. IT->end_charpos may be greater than | |
3710 | IT->string_nchars when this function is called, in which case we | |
3711 | may have to return padding spaces. Value is zero if end of string | |
3712 | reached, including padding spaces. */ | |
3713 | ||
3714 | static int | |
3715 | next_element_from_c_string (it) | |
3716 | struct it *it; | |
3717 | { | |
3718 | int success_p = 1; | |
3719 | ||
3720 | xassert (it->s); | |
3721 | it->what = IT_CHARACTER; | |
3722 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
3723 | it->object = Qnil; | |
3724 | ||
3725 | /* IT's position can be greater IT->string_nchars in case a field | |
3726 | width or precision has been specified when the iterator was | |
3727 | initialized. */ | |
3728 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3729 | { | |
3730 | /* End of the game. */ | |
3731 | it->what = IT_EOB; | |
3732 | success_p = 0; | |
3733 | } | |
3734 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
3735 | { | |
3736 | /* Pad with spaces. */ | |
3737 | it->c = ' ', it->len = 1; | |
3738 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
3739 | } | |
3740 | else if (it->multibyte_p) | |
3741 | { | |
3742 | /* Implementation note: The calls to strlen apparently aren't a | |
3743 | performance problem because there is no noticeable performance | |
3744 | difference between Emacs running in unibyte or multibyte mode. */ | |
3745 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
3746 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
3747 | maxlen, &it->len); | |
5f5c8ee5 GM |
3748 | } |
3749 | else | |
3750 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
3751 | ||
3752 | return success_p; | |
3753 | } | |
3754 | ||
3755 | ||
3756 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
3757 | The definition of the ellipsis glyphs may come from a display table | |
3758 | entry. This function Fills IT with the first glyph from the | |
3759 | ellipsis if an ellipsis is to be displayed. */ | |
3760 | ||
3761 | static void | |
3762 | next_element_from_ellipsis (it) | |
3763 | struct it *it; | |
3764 | { | |
3765 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
3766 | { | |
3767 | /* Use the display table definition for `...'. Invalid glyphs | |
3768 | will be handled by the method returning elements from dpvec. */ | |
3769 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3770 | it->dpvec_char_len = it->len; | |
3771 | it->dpvec = v->contents; | |
3772 | it->dpend = v->contents + v->size; | |
3773 | it->current.dpvec_index = 0; | |
3774 | it->method = next_element_from_display_vector; | |
3775 | get_next_display_element (it); | |
3776 | } | |
3777 | else if (it->selective_display_ellipsis_p) | |
3778 | { | |
3779 | /* Use default `...' which is stored in default_invis_vector. */ | |
3780 | it->dpvec_char_len = it->len; | |
3781 | it->dpvec = default_invis_vector; | |
3782 | it->dpend = default_invis_vector + 3; | |
3783 | it->current.dpvec_index = 0; | |
3784 | it->method = next_element_from_display_vector; | |
3785 | get_next_display_element (it); | |
3786 | } | |
3787 | } | |
3788 | ||
3789 | ||
3790 | /* Deliver an image display element. The iterator IT is already | |
3791 | filled with image information (done in handle_display_prop). Value | |
3792 | is always 1. */ | |
3793 | ||
3794 | ||
3795 | static int | |
3796 | next_element_from_image (it) | |
3797 | struct it *it; | |
3798 | { | |
3799 | it->what = IT_IMAGE; | |
3800 | return 1; | |
3801 | } | |
3802 | ||
3803 | ||
3804 | /* Fill iterator IT with next display element from a stretch glyph | |
3805 | property. IT->object is the value of the text property. Value is | |
3806 | always 1. */ | |
3807 | ||
3808 | static int | |
3809 | next_element_from_stretch (it) | |
3810 | struct it *it; | |
3811 | { | |
3812 | it->what = IT_STRETCH; | |
3813 | return 1; | |
3814 | } | |
3815 | ||
3816 | ||
3817 | /* Load IT with the next display element from current_buffer. Value | |
3818 | is zero if end of buffer reached. IT->stop_charpos is the next | |
3819 | position at which to stop and check for text properties or buffer | |
3820 | end. */ | |
3821 | ||
3822 | static int | |
3823 | next_element_from_buffer (it) | |
3824 | struct it *it; | |
3825 | { | |
3826 | int success_p = 1; | |
3827 | ||
3828 | /* Check this assumption, otherwise, we would never enter the | |
3829 | if-statement, below. */ | |
3830 | xassert (IT_CHARPOS (*it) >= BEGV | |
3831 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
3832 | ||
3833 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
3834 | { | |
3835 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3836 | { | |
3837 | int overlay_strings_follow_p; | |
3838 | ||
3839 | /* End of the game, except when overlay strings follow that | |
3840 | haven't been returned yet. */ | |
3841 | if (it->overlay_strings_at_end_processed_p) | |
3842 | overlay_strings_follow_p = 0; | |
3843 | else | |
3844 | { | |
3845 | it->overlay_strings_at_end_processed_p = 1; | |
3846 | overlay_strings_follow_p | |
3847 | = get_overlay_strings (it); | |
3848 | } | |
3849 | ||
3850 | if (overlay_strings_follow_p) | |
3851 | success_p = get_next_display_element (it); | |
3852 | else | |
3853 | { | |
3854 | it->what = IT_EOB; | |
3855 | it->position = it->current.pos; | |
3856 | success_p = 0; | |
3857 | } | |
3858 | } | |
3859 | else | |
3860 | { | |
3861 | handle_stop (it); | |
3862 | return get_next_display_element (it); | |
3863 | } | |
3864 | } | |
3865 | else | |
3866 | { | |
3867 | /* No face changes, overlays etc. in sight, so just return a | |
3868 | character from current_buffer. */ | |
3869 | unsigned char *p; | |
3870 | ||
3871 | /* Maybe run the redisplay end trigger hook. Performance note: | |
3872 | This doesn't seem to cost measurable time. */ | |
3873 | if (it->redisplay_end_trigger_charpos | |
3874 | && it->glyph_row | |
3875 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
3876 | run_redisplay_end_trigger_hook (it); | |
3877 | ||
3878 | /* Get the next character, maybe multibyte. */ | |
3879 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
3880 | if (it->multibyte_p) | |
3881 | { | |
3882 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
3883 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 3884 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
3885 | } |
3886 | else | |
3887 | it->c = *p, it->len = 1; | |
3888 | ||
3889 | /* Record what we have and where it came from. */ | |
3890 | it->what = IT_CHARACTER;; | |
3891 | it->object = it->w->buffer; | |
3892 | it->position = it->current.pos; | |
3893 | ||
3894 | /* Normally we return the character found above, except when we | |
3895 | really want to return an ellipsis for selective display. */ | |
3896 | if (it->selective) | |
3897 | { | |
3898 | if (it->c == '\n') | |
3899 | { | |
3900 | /* A value of selective > 0 means hide lines indented more | |
3901 | than that number of columns. */ | |
3902 | if (it->selective > 0 | |
3903 | && IT_CHARPOS (*it) + 1 < ZV | |
3904 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
3905 | IT_BYTEPOS (*it) + 1, | |
3906 | it->selective)) | |
312246d1 GM |
3907 | { |
3908 | next_element_from_ellipsis (it); | |
3909 | it->dpvec_char_len = -1; | |
3910 | } | |
5f5c8ee5 GM |
3911 | } |
3912 | else if (it->c == '\r' && it->selective == -1) | |
3913 | { | |
3914 | /* A value of selective == -1 means that everything from the | |
3915 | CR to the end of the line is invisible, with maybe an | |
3916 | ellipsis displayed for it. */ | |
3917 | next_element_from_ellipsis (it); | |
312246d1 | 3918 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
3919 | } |
3920 | } | |
3921 | } | |
3922 | ||
3923 | /* Value is zero if end of buffer reached. */ | |
3924 | xassert (!success_p || it->len > 0); | |
3925 | return success_p; | |
3926 | } | |
3927 | ||
3928 | ||
3929 | /* Run the redisplay end trigger hook for IT. */ | |
3930 | ||
3931 | static void | |
3932 | run_redisplay_end_trigger_hook (it) | |
3933 | struct it *it; | |
3934 | { | |
3935 | Lisp_Object args[3]; | |
3936 | ||
3937 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
3938 | displaying something, or otherwise we should not run the hook. */ | |
3939 | xassert (it->glyph_row); | |
3940 | ||
3941 | /* Set up hook arguments. */ | |
3942 | args[0] = Qredisplay_end_trigger_functions; | |
3943 | args[1] = it->window; | |
3944 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
3945 | it->redisplay_end_trigger_charpos = 0; | |
3946 | ||
3947 | /* Since we are *trying* to run these functions, don't try to run | |
3948 | them again, even if they get an error. */ | |
3949 | it->w->redisplay_end_trigger = Qnil; | |
3950 | Frun_hook_with_args (3, args); | |
3951 | ||
3952 | /* Notice if it changed the face of the character we are on. */ | |
3953 | handle_face_prop (it); | |
3954 | } | |
3955 | ||
3956 | ||
3957 | \f | |
3958 | /*********************************************************************** | |
3959 | Moving an iterator without producing glyphs | |
3960 | ***********************************************************************/ | |
3961 | ||
3962 | /* Move iterator IT to a specified buffer or X position within one | |
3963 | line on the display without producing glyphs. | |
3964 | ||
3965 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
3966 | whichever is reached first. | |
3967 | ||
3968 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
3969 | ||
3970 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
3971 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
3972 | TO_X includes the amount by which a window is horizontally | |
3973 | scrolled. | |
3974 | ||
3975 | Value is | |
3976 | ||
3977 | MOVE_POS_MATCH_OR_ZV | |
3978 | - when TO_POS or ZV was reached. | |
3979 | ||
3980 | MOVE_X_REACHED | |
3981 | -when TO_X was reached before TO_POS or ZV were reached. | |
3982 | ||
3983 | MOVE_LINE_CONTINUED | |
3984 | - when we reached the end of the display area and the line must | |
3985 | be continued. | |
3986 | ||
3987 | MOVE_LINE_TRUNCATED | |
3988 | - when we reached the end of the display area and the line is | |
3989 | truncated. | |
3990 | ||
3991 | MOVE_NEWLINE_OR_CR | |
3992 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
3993 | display is on. */ | |
3994 | ||
3995 | enum move_it_result | |
3996 | move_it_in_display_line_to (it, to_charpos, to_x, op) | |
3997 | struct it *it; | |
3998 | int to_charpos, to_x, op; | |
3999 | { | |
4000 | enum move_it_result result = MOVE_UNDEFINED; | |
4001 | struct glyph_row *saved_glyph_row; | |
4002 | ||
4003 | /* Don't produce glyphs in produce_glyphs. */ | |
4004 | saved_glyph_row = it->glyph_row; | |
4005 | it->glyph_row = NULL; | |
4006 | ||
4007 | #if NO_PROMPT_IN_BUFFER | |
4008 | /* Take a mini-buffer prompt into account. */ | |
4009 | if (MINI_WINDOW_P (it->w) | |
4010 | && IT_CHARPOS (*it) == BEGV) | |
4011 | { | |
4012 | it->current_x = minibuf_prompt_pixel_width; | |
4013 | it->hpos = minibuf_prompt_width; | |
4014 | } | |
4015 | #endif | |
4016 | ||
4017 | while (1) | |
4018 | { | |
4019 | int x, i; | |
4020 | ||
4021 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4022 | if (!get_next_display_element (it) | |
4023 | || ((op & MOVE_TO_POS) != 0 | |
4024 | && BUFFERP (it->object) | |
4025 | && IT_CHARPOS (*it) >= to_charpos)) | |
4026 | { | |
4027 | result = MOVE_POS_MATCH_OR_ZV; | |
4028 | break; | |
4029 | } | |
4030 | ||
4031 | /* The call to produce_glyphs will get the metrics of the | |
4032 | display element IT is loaded with. We record in x the | |
4033 | x-position before this display element in case it does not | |
4034 | fit on the line. */ | |
4035 | x = it->current_x; | |
4036 | PRODUCE_GLYPHS (it); | |
4037 | ||
4038 | if (it->area != TEXT_AREA) | |
4039 | { | |
4040 | set_iterator_to_next (it); | |
4041 | continue; | |
4042 | } | |
4043 | ||
4044 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4045 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4046 | character on a terminal frame, or (iii) a line end. For the | |
4047 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4048 | (on X frames, there is only one glyph produced for a | |
4049 | composite character. | |
4050 | ||
4051 | The behavior implemented below means, for continuation lines, | |
4052 | that as many spaces of a TAB as fit on the current line are | |
4053 | displayed there. For terminal frames, as many glyphs of a | |
4054 | multi-glyph character are displayed in the current line, too. | |
4055 | This is what the old redisplay code did, and we keep it that | |
4056 | way. Under X, the whole shape of a complex character must | |
4057 | fit on the line or it will be completely displayed in the | |
4058 | next line. | |
4059 | ||
4060 | Note that both for tabs and padding glyphs, all glyphs have | |
4061 | the same width. */ | |
4062 | if (it->nglyphs) | |
4063 | { | |
4064 | /* More than one glyph or glyph doesn't fit on line. All | |
4065 | glyphs have the same width. */ | |
4066 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4067 | int new_x; | |
4068 | ||
4069 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4070 | { | |
4071 | new_x = x + single_glyph_width; | |
4072 | ||
4073 | /* We want to leave anything reaching TO_X to the caller. */ | |
4074 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4075 | { | |
4076 | it->current_x = x; | |
4077 | result = MOVE_X_REACHED; | |
4078 | break; | |
4079 | } | |
4080 | else if (/* Lines are continued. */ | |
4081 | !it->truncate_lines_p | |
4082 | && (/* And glyph doesn't fit on the line. */ | |
4083 | new_x > it->last_visible_x | |
4084 | /* Or it fits exactly and we're on a window | |
4085 | system frame. */ | |
4086 | || (new_x == it->last_visible_x | |
4087 | && FRAME_WINDOW_P (it->f)))) | |
4088 | { | |
4089 | if (/* IT->hpos == 0 means the very first glyph | |
4090 | doesn't fit on the line, e.g. a wide image. */ | |
4091 | it->hpos == 0 | |
4092 | || (new_x == it->last_visible_x | |
4093 | && FRAME_WINDOW_P (it->f))) | |
4094 | { | |
4095 | ++it->hpos; | |
4096 | it->current_x = new_x; | |
4097 | if (i == it->nglyphs - 1) | |
4098 | set_iterator_to_next (it); | |
4099 | } | |
4100 | else | |
4101 | it->current_x = x; | |
4102 | ||
4103 | result = MOVE_LINE_CONTINUED; | |
4104 | break; | |
4105 | } | |
4106 | else if (new_x > it->first_visible_x) | |
4107 | { | |
4108 | /* Glyph is visible. Increment number of glyphs that | |
4109 | would be displayed. */ | |
4110 | ++it->hpos; | |
4111 | } | |
4112 | else | |
4113 | { | |
4114 | /* Glyph is completely off the left margin of the display | |
4115 | area. Nothing to do. */ | |
4116 | } | |
4117 | } | |
4118 | ||
4119 | if (result != MOVE_UNDEFINED) | |
4120 | break; | |
4121 | } | |
4122 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4123 | { | |
4124 | /* Stop when TO_X specified and reached. This check is | |
4125 | necessary here because of lines consisting of a line end, | |
4126 | only. The line end will not produce any glyphs and we | |
4127 | would never get MOVE_X_REACHED. */ | |
4128 | xassert (it->nglyphs == 0); | |
4129 | result = MOVE_X_REACHED; | |
4130 | break; | |
4131 | } | |
4132 | ||
4133 | /* Is this a line end? If yes, we're done. */ | |
4134 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4135 | { | |
4136 | result = MOVE_NEWLINE_OR_CR; | |
4137 | break; | |
4138 | } | |
4139 | ||
4140 | /* The current display element has been consumed. Advance | |
4141 | to the next. */ | |
4142 | set_iterator_to_next (it); | |
4143 | ||
4144 | /* Stop if lines are truncated and IT's current x-position is | |
4145 | past the right edge of the window now. */ | |
4146 | if (it->truncate_lines_p | |
4147 | && it->current_x >= it->last_visible_x) | |
4148 | { | |
4149 | result = MOVE_LINE_TRUNCATED; | |
4150 | break; | |
4151 | } | |
4152 | } | |
4153 | ||
4154 | /* Restore the iterator settings altered at the beginning of this | |
4155 | function. */ | |
4156 | it->glyph_row = saved_glyph_row; | |
4157 | return result; | |
4158 | } | |
4159 | ||
4160 | ||
4161 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4162 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4163 | the description of enum move_operation_enum. | |
4164 | ||
4165 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4166 | screen line, this function will set IT to the next position > | |
4167 | TO_CHARPOS. */ | |
4168 | ||
4169 | void | |
4170 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4171 | struct it *it; | |
4172 | int to_charpos, to_x, to_y, to_vpos; | |
4173 | int op; | |
4174 | { | |
4175 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4176 | int line_height; | |
4177 | ||
4178 | xassert (XBUFFER (it->w->buffer) == current_buffer); | |
4179 | ||
4180 | while (1) | |
4181 | { | |
4182 | if (op & MOVE_TO_VPOS) | |
4183 | { | |
4184 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4185 | start of the line TO_VPOS. */ | |
4186 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4187 | { | |
4188 | if (it->vpos == to_vpos) | |
4189 | break; | |
4190 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
4191 | } | |
4192 | else | |
4193 | { | |
4194 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4195 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
4196 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); | |
4197 | ||
4198 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
4199 | break; | |
4200 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) | |
4201 | { | |
4202 | /* We have reached TO_X but not in the line we want. */ | |
4203 | skip = move_it_in_display_line_to (it, to_charpos, | |
4204 | -1, MOVE_TO_POS); | |
4205 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4206 | break; | |
4207 | } | |
4208 | } | |
4209 | } | |
4210 | else if (op & MOVE_TO_Y) | |
4211 | { | |
4212 | struct it it_backup; | |
4213 | int done_p; | |
4214 | ||
4215 | /* TO_Y specified means stop at TO_X in the line containing | |
4216 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4217 | problem is that we can't really tell whether the line | |
4218 | contains TO_Y before we have completely scanned it, and | |
4219 | this may skip past TO_X. What we do is to first scan to | |
4220 | TO_X. | |
4221 | ||
4222 | If TO_X is not specified, use a TO_X of zero. The reason | |
4223 | is to make the outcome of this function more predictable. | |
4224 | If we didn't use TO_X == 0, we would stop at the end of | |
4225 | the line which is probably not what a caller would expect | |
4226 | to happen. */ | |
4227 | skip = move_it_in_display_line_to (it, to_charpos, | |
4228 | ((op & MOVE_TO_X) | |
4229 | ? to_x : 0), | |
4230 | (MOVE_TO_X | |
4231 | | (op & MOVE_TO_POS))); | |
4232 | ||
4233 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4234 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4235 | break; | |
4236 | ||
4237 | /* If TO_X was reached, we would like to know whether TO_Y | |
4238 | is in the line. This can only be said if we know the | |
4239 | total line height which requires us to scan the rest of | |
4240 | the line. */ | |
4241 | done_p = 0; | |
4242 | if (skip == MOVE_X_REACHED) | |
4243 | { | |
4244 | it_backup = *it; | |
4245 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, | |
4246 | op & MOVE_TO_POS); | |
4247 | } | |
4248 | ||
4249 | /* Now, decide whether TO_Y is in this line. */ | |
4250 | line_height = it->max_ascent + it->max_descent; | |
4251 | ||
4252 | if (to_y >= it->current_y | |
4253 | && to_y < it->current_y + line_height) | |
4254 | { | |
4255 | if (skip == MOVE_X_REACHED) | |
4256 | /* If TO_Y is in this line and TO_X was reached above, | |
4257 | we scanned too far. We have to restore IT's settings | |
4258 | to the ones before skipping. */ | |
4259 | *it = it_backup; | |
4260 | done_p = 1; | |
4261 | } | |
4262 | else if (skip == MOVE_X_REACHED) | |
4263 | { | |
4264 | skip = skip2; | |
4265 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4266 | done_p = 1; | |
4267 | } | |
4268 | ||
4269 | if (done_p) | |
4270 | break; | |
4271 | } | |
4272 | else | |
4273 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4274 | ||
4275 | switch (skip) | |
4276 | { | |
4277 | case MOVE_POS_MATCH_OR_ZV: | |
4278 | return; | |
4279 | ||
4280 | case MOVE_NEWLINE_OR_CR: | |
4281 | set_iterator_to_next (it); | |
4282 | it->continuation_lines_width = 0; | |
4283 | break; | |
4284 | ||
4285 | case MOVE_LINE_TRUNCATED: | |
4286 | it->continuation_lines_width = 0; | |
312246d1 | 4287 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4288 | if ((op & MOVE_TO_POS) != 0 |
4289 | && IT_CHARPOS (*it) > to_charpos) | |
4290 | goto out; | |
4291 | break; | |
4292 | ||
4293 | case MOVE_LINE_CONTINUED: | |
4294 | it->continuation_lines_width += it->current_x; | |
4295 | break; | |
4296 | ||
4297 | default: | |
4298 | abort (); | |
4299 | } | |
4300 | ||
4301 | /* Reset/increment for the next run. */ | |
4302 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4303 | it->current_x = it->hpos = 0; | |
4304 | it->current_y += it->max_ascent + it->max_descent; | |
4305 | ++it->vpos; | |
4306 | last_height = it->max_ascent + it->max_descent; | |
4307 | last_max_ascent = it->max_ascent; | |
4308 | it->max_ascent = it->max_descent = 0; | |
4309 | } | |
4310 | out:; | |
4311 | } | |
4312 | ||
4313 | ||
4314 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4315 | ||
4316 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4317 | means move IT backward to the preceding line start or BEGV. This | |
4318 | function may move over more than DY pixels if IT->current_y - DY | |
4319 | ends up in the middle of a line; in this case IT->current_y will be | |
4320 | set to the top of the line moved to. */ | |
4321 | ||
4322 | void | |
4323 | move_it_vertically_backward (it, dy) | |
4324 | struct it *it; | |
4325 | int dy; | |
4326 | { | |
4327 | int nlines, h, line_height; | |
4328 | struct it it2; | |
4329 | int start_pos = IT_CHARPOS (*it); | |
4330 | ||
4331 | xassert (dy >= 0); | |
4332 | ||
4333 | /* Estimate how many newlines we must move back. */ | |
4334 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4335 | ||
4336 | /* Set the iterator's position that many lines back. */ | |
4337 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4338 | back_to_previous_visible_line_start (it); | |
4339 | ||
4340 | /* Reseat the iterator here. When moving backward, we don't want | |
4341 | reseat to skip forward over invisible text, set up the iterator | |
4342 | to deliver from overlay strings at the new position etc. So, | |
4343 | use reseat_1 here. */ | |
4344 | reseat_1 (it, it->current.pos, 1); | |
4345 | ||
4346 | /* We are now surely at a line start. */ | |
4347 | it->current_x = it->hpos = 0; | |
4348 | ||
4349 | /* Move forward and see what y-distance we moved. First move to the | |
4350 | start of the next line so that we get its height. We need this | |
4351 | height to be able to tell whether we reached the specified | |
4352 | y-distance. */ | |
4353 | it2 = *it; | |
4354 | it2.max_ascent = it2.max_descent = 0; | |
4355 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4356 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4357 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4358 | line_height = it2.max_ascent + it2.max_descent; | |
4359 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); | |
4360 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4361 | h = it2.current_y - it->current_y; | |
4362 | nlines = it2.vpos - it->vpos; | |
4363 | ||
4364 | /* Correct IT's y and vpos position. */ | |
4365 | it->vpos -= nlines; | |
4366 | it->current_y -= h; | |
4367 | ||
4368 | if (dy == 0) | |
4369 | { | |
4370 | /* DY == 0 means move to the start of the screen line. The | |
4371 | value of nlines is > 0 if continuation lines were involved. */ | |
4372 | if (nlines > 0) | |
4373 | move_it_by_lines (it, nlines, 1); | |
4374 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4375 | } | |
4376 | else if (nlines) | |
4377 | { | |
4378 | /* The y-position we try to reach. Note that h has been | |
4379 | subtracted in front of the if-statement. */ | |
4380 | int target_y = it->current_y + h - dy; | |
4381 | ||
4382 | /* If we did not reach target_y, try to move further backward if | |
4383 | we can. If we moved too far backward, try to move forward. */ | |
4384 | if (target_y < it->current_y | |
4385 | && IT_CHARPOS (*it) > BEGV) | |
4386 | { | |
4387 | move_it_vertically (it, target_y - it->current_y); | |
4388 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4389 | } | |
4390 | else if (target_y >= it->current_y + line_height | |
4391 | && IT_CHARPOS (*it) < ZV) | |
4392 | { | |
4393 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4394 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4395 | } | |
4396 | } | |
4397 | } | |
4398 | ||
4399 | ||
4400 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4401 | move backwards. DY = 0 means move to start of screen line. At the | |
4402 | end, IT will be on the start of a screen line. */ | |
4403 | ||
4404 | void | |
4405 | move_it_vertically (it, dy) | |
4406 | struct it *it; | |
4407 | int dy; | |
4408 | { | |
4409 | if (dy <= 0) | |
4410 | move_it_vertically_backward (it, -dy); | |
4411 | else if (dy > 0) | |
4412 | { | |
4413 | move_it_to (it, ZV, -1, it->current_y + dy, -1, | |
4414 | MOVE_TO_POS | MOVE_TO_Y); | |
4415 | ||
4416 | /* If buffer ends in ZV without a newline, move to the start of | |
4417 | the line to satisfy the post-condition. */ | |
4418 | if (IT_CHARPOS (*it) == ZV | |
4419 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4420 | move_it_by_lines (it, 0, 0); | |
4421 | } | |
4422 | } | |
4423 | ||
4424 | ||
4425 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4426 | and END_CHARPOS is invisible. IT->window is the window for text | |
4427 | property lookup. */ | |
4428 | ||
4429 | static int | |
4430 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4431 | struct it *it; | |
4432 | int start_charpos, end_charpos; | |
4433 | { | |
4434 | #ifdef USE_TEXT_PROPERTIES | |
4435 | Lisp_Object prop, limit; | |
4436 | int invisible_found_p; | |
4437 | ||
4438 | xassert (it != NULL && start_charpos <= end_charpos); | |
4439 | ||
4440 | /* Is text at START invisible? */ | |
4441 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4442 | it->window); | |
4443 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4444 | invisible_found_p = 1; | |
4445 | else | |
4446 | { | |
4447 | limit = Fnext_single_property_change (make_number (start_charpos), | |
4448 | Qinvisible, | |
4449 | Fcurrent_buffer (), | |
4450 | make_number (end_charpos)); | |
4451 | invisible_found_p = XFASTINT (limit) < end_charpos; | |
4452 | } | |
4453 | ||
4454 | return invisible_found_p; | |
4455 | ||
4456 | #else /* not USE_TEXT_PROPERTIES */ | |
4457 | return 0; | |
4458 | #endif /* not USE_TEXT_PROPERTIES */ | |
4459 | } | |
4460 | ||
4461 | ||
4462 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4463 | negative means move up. DVPOS == 0 means move to the start of the | |
4464 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4465 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4466 | ||
4467 | Further optimization ideas: If we would know that IT->f doesn't use | |
4468 | a face with proportional font, we could be faster for | |
4469 | truncate-lines nil. */ | |
4470 | ||
4471 | void | |
4472 | move_it_by_lines (it, dvpos, need_y_p) | |
4473 | struct it *it; | |
4474 | int dvpos, need_y_p; | |
4475 | { | |
4476 | struct position pos; | |
4477 | ||
4478 | if (!FRAME_WINDOW_P (it->f)) | |
4479 | { | |
4480 | struct text_pos textpos; | |
4481 | ||
4482 | /* We can use vmotion on frames without proportional fonts. */ | |
4483 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4484 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4485 | reseat (it, textpos, 1); | |
4486 | it->vpos += pos.vpos; | |
4487 | it->current_y += pos.vpos; | |
4488 | } | |
4489 | else if (dvpos == 0) | |
4490 | { | |
4491 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4492 | move_it_vertically_backward (it, 0); | |
4493 | xassert (it->current_x == 0 && it->hpos == 0); | |
4494 | } | |
4495 | else if (dvpos > 0) | |
4496 | { | |
4497 | /* If there are no continuation lines, and if there is no | |
4498 | selective display, try the simple method of moving forward | |
4499 | DVPOS newlines, then see where we are. */ | |
4500 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4501 | { | |
4502 | int shortage = 0, charpos; | |
4503 | ||
4504 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4505 | charpos = IT_CHARPOS (*it) + 1; | |
4506 | else | |
4507 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4508 | &shortage, 0); | |
4509 | ||
4510 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4511 | { | |
4512 | struct text_pos pos; | |
4513 | CHARPOS (pos) = charpos; | |
4514 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4515 | reseat (it, pos, 1); | |
4516 | it->vpos += dvpos - shortage; | |
4517 | it->hpos = it->current_x = 0; | |
4518 | return; | |
4519 | } | |
4520 | } | |
4521 | ||
4522 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4523 | } | |
4524 | else | |
4525 | { | |
4526 | struct it it2; | |
4527 | int start_charpos, i; | |
4528 | ||
4529 | /* If there are no continuation lines, and if there is no | |
4530 | selective display, try the simple method of moving backward | |
4531 | -DVPOS newlines. */ | |
4532 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4533 | { | |
4534 | int shortage; | |
4535 | int charpos = IT_CHARPOS (*it); | |
4536 | int bytepos = IT_BYTEPOS (*it); | |
4537 | ||
4538 | /* If in the middle of a line, go to its start. */ | |
4539 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4540 | { | |
4541 | charpos = find_next_newline_no_quit (charpos, -1); | |
4542 | bytepos = CHAR_TO_BYTE (charpos); | |
4543 | } | |
4544 | ||
4545 | if (charpos == BEGV) | |
4546 | { | |
4547 | struct text_pos pos; | |
4548 | CHARPOS (pos) = charpos; | |
4549 | BYTEPOS (pos) = bytepos; | |
4550 | reseat (it, pos, 1); | |
4551 | it->hpos = it->current_x = 0; | |
4552 | return; | |
4553 | } | |
4554 | else | |
4555 | { | |
4556 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4557 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4558 | { | |
4559 | struct text_pos pos; | |
4560 | CHARPOS (pos) = charpos; | |
4561 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4562 | reseat (it, pos, 1); | |
4563 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4564 | it->hpos = it->current_x = 0; | |
4565 | return; | |
4566 | } | |
4567 | } | |
4568 | } | |
4569 | ||
4570 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4571 | start_charpos = IT_CHARPOS (*it); | |
4572 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4573 | back_to_previous_visible_line_start (it); | |
4574 | reseat (it, it->current.pos, 1); | |
4575 | it->current_x = it->hpos = 0; | |
4576 | ||
4577 | /* Above call may have moved too far if continuation lines | |
4578 | are involved. Scan forward and see if it did. */ | |
4579 | it2 = *it; | |
4580 | it2.vpos = it2.current_y = 0; | |
4581 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4582 | it->vpos -= it2.vpos; | |
4583 | it->current_y -= it2.current_y; | |
4584 | it->current_x = it->hpos = 0; | |
4585 | ||
4586 | /* If we moved too far, move IT some lines forward. */ | |
4587 | if (it2.vpos > -dvpos) | |
4588 | { | |
4589 | int delta = it2.vpos + dvpos; | |
4590 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4591 | } | |
4592 | } | |
4593 | } | |
4594 | ||
4595 | ||
4596 | \f | |
4597 | /*********************************************************************** | |
4598 | Messages | |
4599 | ***********************************************************************/ | |
4600 | ||
4601 | ||
4602 | /* Output a newline in the *Messages* buffer if "needs" one. */ | |
4603 | ||
4604 | void | |
4605 | message_log_maybe_newline () | |
4606 | { | |
4607 | if (message_log_need_newline) | |
4608 | message_dolog ("", 0, 1, 0); | |
4609 | } | |
4610 | ||
4611 | ||
4612 | /* Add a string M of length LEN to the message log, optionally | |
4613 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4614 | nonzero, means interpret the contents of M as multibyte. This | |
4615 | function calls low-level routines in order to bypass text property | |
4616 | hooks, etc. which might not be safe to run. */ | |
4617 | ||
4618 | void | |
4619 | message_dolog (m, len, nlflag, multibyte) | |
4620 | char *m; | |
4621 | int len, nlflag, multibyte; | |
4622 | { | |
4623 | if (!NILP (Vmessage_log_max)) | |
4624 | { | |
4625 | struct buffer *oldbuf; | |
4626 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4627 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4628 | int point_at_end = 0; | |
4629 | int zv_at_end = 0; | |
4630 | Lisp_Object old_deactivate_mark, tem; | |
4631 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4632 | ||
4633 | old_deactivate_mark = Vdeactivate_mark; | |
4634 | oldbuf = current_buffer; | |
4635 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); | |
4636 | current_buffer->undo_list = Qt; | |
4637 | ||
4638 | oldpoint = Fpoint_marker (); | |
4639 | oldbegv = Fpoint_min_marker (); | |
4640 | oldzv = Fpoint_max_marker (); | |
4641 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
4642 | ||
4643 | if (PT == Z) | |
4644 | point_at_end = 1; | |
4645 | if (ZV == Z) | |
4646 | zv_at_end = 1; | |
4647 | ||
4648 | BEGV = BEG; | |
4649 | BEGV_BYTE = BEG_BYTE; | |
4650 | ZV = Z; | |
4651 | ZV_BYTE = Z_BYTE; | |
4652 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4653 | ||
4654 | /* Insert the string--maybe converting multibyte to single byte | |
4655 | or vice versa, so that all the text fits the buffer. */ | |
4656 | if (multibyte | |
4657 | && NILP (current_buffer->enable_multibyte_characters)) | |
4658 | { | |
4659 | int i, c, nbytes; | |
4660 | unsigned char work[1]; | |
4661 | ||
4662 | /* Convert a multibyte string to single-byte | |
4663 | for the *Message* buffer. */ | |
4664 | for (i = 0; i < len; i += nbytes) | |
4665 | { | |
4fdb80f2 | 4666 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
4667 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
4668 | ? c | |
4669 | : multibyte_char_to_unibyte (c, Qnil)); | |
4670 | insert_1_both (work, 1, 1, 1, 0, 0); | |
4671 | } | |
4672 | } | |
4673 | else if (! multibyte | |
4674 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
4675 | { | |
4676 | int i, c, nbytes; | |
4677 | unsigned char *msg = (unsigned char *) m; | |
4678 | unsigned char *str, work[4]; | |
4679 | /* Convert a single-byte string to multibyte | |
4680 | for the *Message* buffer. */ | |
4681 | for (i = 0; i < len; i++) | |
4682 | { | |
4683 | c = unibyte_char_to_multibyte (msg[i]); | |
4684 | nbytes = CHAR_STRING (c, work, str); | |
4685 | insert_1_both (work, 1, nbytes, 1, 0, 0); | |
4686 | } | |
4687 | } | |
4688 | else if (len) | |
4689 | insert_1 (m, len, 1, 0, 0); | |
4690 | ||
4691 | if (nlflag) | |
4692 | { | |
4693 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
4694 | insert_1 ("\n", 1, 1, 0, 0); | |
4695 | ||
4696 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
4697 | this_bol = PT; | |
4698 | this_bol_byte = PT_BYTE; | |
4699 | ||
4700 | if (this_bol > BEG) | |
4701 | { | |
4702 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
4703 | prev_bol = PT; | |
4704 | prev_bol_byte = PT_BYTE; | |
4705 | ||
4706 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
4707 | this_bol, this_bol_byte); | |
4708 | if (dup) | |
4709 | { | |
4710 | del_range_both (prev_bol, prev_bol_byte, | |
4711 | this_bol, this_bol_byte, 0); | |
4712 | if (dup > 1) | |
4713 | { | |
4714 | char dupstr[40]; | |
4715 | int duplen; | |
4716 | ||
4717 | /* If you change this format, don't forget to also | |
4718 | change message_log_check_duplicate. */ | |
4719 | sprintf (dupstr, " [%d times]", dup); | |
4720 | duplen = strlen (dupstr); | |
4721 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
4722 | insert_1 (dupstr, duplen, 1, 0, 1); | |
4723 | } | |
4724 | } | |
4725 | } | |
4726 | ||
4727 | if (NATNUMP (Vmessage_log_max)) | |
4728 | { | |
4729 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
4730 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
4731 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
4732 | } | |
4733 | } | |
4734 | BEGV = XMARKER (oldbegv)->charpos; | |
4735 | BEGV_BYTE = marker_byte_position (oldbegv); | |
4736 | ||
4737 | if (zv_at_end) | |
4738 | { | |
4739 | ZV = Z; | |
4740 | ZV_BYTE = Z_BYTE; | |
4741 | } | |
4742 | else | |
4743 | { | |
4744 | ZV = XMARKER (oldzv)->charpos; | |
4745 | ZV_BYTE = marker_byte_position (oldzv); | |
4746 | } | |
4747 | ||
4748 | if (point_at_end) | |
4749 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4750 | else | |
4751 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
4752 | Lisp code. */ | |
4753 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
4754 | XMARKER (oldpoint)->bytepos); | |
4755 | ||
4756 | UNGCPRO; | |
4757 | free_marker (oldpoint); | |
4758 | free_marker (oldbegv); | |
4759 | free_marker (oldzv); | |
4760 | ||
4761 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
4762 | set_buffer_internal (oldbuf); | |
4763 | if (NILP (tem)) | |
4764 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
4765 | message_log_need_newline = !nlflag; | |
4766 | Vdeactivate_mark = old_deactivate_mark; | |
4767 | } | |
4768 | } | |
4769 | ||
4770 | ||
4771 | /* We are at the end of the buffer after just having inserted a newline. | |
4772 | (Note: We depend on the fact we won't be crossing the gap.) | |
4773 | Check to see if the most recent message looks a lot like the previous one. | |
4774 | Return 0 if different, 1 if the new one should just replace it, or a | |
4775 | value N > 1 if we should also append " [N times]". */ | |
4776 | ||
4777 | static int | |
4778 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
4779 | int prev_bol, this_bol; | |
4780 | int prev_bol_byte, this_bol_byte; | |
4781 | { | |
4782 | int i; | |
4783 | int len = Z_BYTE - 1 - this_bol_byte; | |
4784 | int seen_dots = 0; | |
4785 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
4786 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
4787 | ||
4788 | for (i = 0; i < len; i++) | |
4789 | { | |
4790 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
4791 | && p1[i] != '\n') | |
4792 | seen_dots = 1; | |
4793 | if (p1[i] != p2[i]) | |
4794 | return seen_dots; | |
4795 | } | |
4796 | p1 += len; | |
4797 | if (*p1 == '\n') | |
4798 | return 2; | |
4799 | if (*p1++ == ' ' && *p1++ == '[') | |
4800 | { | |
4801 | int n = 0; | |
4802 | while (*p1 >= '0' && *p1 <= '9') | |
4803 | n = n * 10 + *p1++ - '0'; | |
4804 | if (strncmp (p1, " times]\n", 8) == 0) | |
4805 | return n+1; | |
4806 | } | |
4807 | return 0; | |
4808 | } | |
4809 | ||
4810 | ||
4811 | /* Display an echo area message M with a specified length of LEN | |
4812 | chars. The string may include null characters. If M is 0, clear | |
4813 | out any existing message, and let the mini-buffer text show through. | |
4814 | ||
4815 | The buffer M must continue to exist until after the echo area gets | |
4816 | cleared or some other message gets displayed there. This means do | |
4817 | not pass text that is stored in a Lisp string; do not pass text in | |
4818 | a buffer that was alloca'd. */ | |
4819 | ||
4820 | void | |
4821 | message2 (m, len, multibyte) | |
4822 | char *m; | |
4823 | int len; | |
4824 | int multibyte; | |
4825 | { | |
4826 | /* First flush out any partial line written with print. */ | |
4827 | message_log_maybe_newline (); | |
4828 | if (m) | |
4829 | message_dolog (m, len, 1, multibyte); | |
4830 | message2_nolog (m, len, multibyte); | |
4831 | } | |
4832 | ||
4833 | ||
4834 | /* The non-logging counterpart of message2. */ | |
4835 | ||
4836 | void | |
4837 | message2_nolog (m, len, multibyte) | |
4838 | char *m; | |
4839 | int len; | |
4840 | { | |
4841 | message_enable_multibyte = multibyte; | |
4842 | ||
4843 | if (noninteractive) | |
4844 | { | |
4845 | if (noninteractive_need_newline) | |
4846 | putc ('\n', stderr); | |
4847 | noninteractive_need_newline = 0; | |
4848 | if (m) | |
4849 | fwrite (m, len, 1, stderr); | |
4850 | if (cursor_in_echo_area == 0) | |
4851 | fprintf (stderr, "\n"); | |
4852 | fflush (stderr); | |
4853 | } | |
4854 | /* A null message buffer means that the frame hasn't really been | |
4855 | initialized yet. Error messages get reported properly by | |
4856 | cmd_error, so this must be just an informative message; toss it. */ | |
4857 | else if (INTERACTIVE | |
4858 | && selected_frame->glyphs_initialized_p | |
4859 | && FRAME_MESSAGE_BUF (selected_frame)) | |
4860 | { | |
4861 | Lisp_Object mini_window; | |
4862 | struct frame *f; | |
4863 | ||
4864 | /* Get the frame containing the mini-buffer | |
4865 | that the selected frame is using. */ | |
4866 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
4867 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
4868 | ||
4869 | FRAME_SAMPLE_VISIBILITY (f); | |
4870 | if (FRAME_VISIBLE_P (selected_frame) | |
4871 | && ! FRAME_VISIBLE_P (f)) | |
4872 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4873 | ||
4874 | if (m) | |
4875 | { | |
4876 | echo_area_glyphs = m; | |
4877 | echo_area_glyphs_length = len; | |
4878 | echo_area_message = Qnil; | |
4879 | ||
4880 | if (minibuffer_auto_raise) | |
4881 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4882 | } | |
4883 | else | |
4884 | { | |
4885 | echo_area_glyphs = previous_echo_glyphs = NULL; | |
4886 | echo_area_message = previous_echo_area_message = Qnil; | |
4887 | } | |
4888 | ||
4889 | do_pending_window_change (); | |
4890 | echo_area_display (1); | |
4891 | do_pending_window_change (); | |
4892 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) | |
4893 | (*frame_up_to_date_hook) (f); | |
4894 | } | |
4895 | } | |
4896 | ||
4897 | ||
4898 | /* Display an echo area message M with a specified length of LEN | |
4899 | chars. The string may include null characters. If M is not a | |
4900 | string, clear out any existing message, and let the mini-buffer | |
4901 | text show through. */ | |
4902 | ||
4903 | void | |
4904 | message3 (m, len, multibyte) | |
4905 | Lisp_Object m; | |
4906 | int len; | |
4907 | int multibyte; | |
4908 | { | |
4909 | struct gcpro gcpro1; | |
4910 | ||
4911 | GCPRO1 (m); | |
4912 | ||
4913 | /* First flush out any partial line written with print. */ | |
4914 | message_log_maybe_newline (); | |
4915 | if (STRINGP (m)) | |
4916 | message_dolog (XSTRING (m)->data, len, 1, multibyte); | |
4917 | message3_nolog (m, len, multibyte); | |
4918 | ||
4919 | UNGCPRO; | |
4920 | } | |
4921 | ||
4922 | ||
4923 | /* The non-logging version of message3. */ | |
4924 | ||
4925 | void | |
4926 | message3_nolog (m, len, multibyte) | |
4927 | Lisp_Object m; | |
4928 | int len, multibyte; | |
4929 | { | |
4930 | message_enable_multibyte = multibyte; | |
4931 | ||
4932 | if (noninteractive) | |
4933 | { | |
4934 | if (noninteractive_need_newline) | |
4935 | putc ('\n', stderr); | |
4936 | noninteractive_need_newline = 0; | |
4937 | if (STRINGP (m)) | |
4938 | fwrite (XSTRING (m)->data, len, 1, stderr); | |
4939 | if (cursor_in_echo_area == 0) | |
4940 | fprintf (stderr, "\n"); | |
4941 | fflush (stderr); | |
4942 | } | |
4943 | /* A null message buffer means that the frame hasn't really been | |
4944 | initialized yet. Error messages get reported properly by | |
4945 | cmd_error, so this must be just an informative message; toss it. */ | |
4946 | else if (INTERACTIVE | |
4947 | && selected_frame->glyphs_initialized_p | |
4948 | && FRAME_MESSAGE_BUF (selected_frame)) | |
4949 | { | |
4950 | Lisp_Object mini_window; | |
4951 | struct frame *f; | |
4952 | ||
4953 | /* Get the frame containing the mini-buffer | |
4954 | that the selected frame is using. */ | |
4955 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
4956 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
4957 | ||
4958 | FRAME_SAMPLE_VISIBILITY (f); | |
4959 | if (FRAME_VISIBLE_P (selected_frame) | |
4960 | && ! FRAME_VISIBLE_P (f)) | |
4961 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4962 | ||
4963 | if (STRINGP (m)) | |
4964 | { | |
4965 | echo_area_glyphs = NULL; | |
4966 | echo_area_message = m; | |
4967 | echo_area_glyphs_length = len; | |
4968 | ||
4969 | if (minibuffer_auto_raise) | |
4970 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4971 | } | |
4972 | else | |
4973 | { | |
4974 | echo_area_glyphs = previous_echo_glyphs = NULL; | |
4975 | echo_area_message = previous_echo_area_message = Qnil; | |
4976 | } | |
4977 | ||
4978 | do_pending_window_change (); | |
4979 | echo_area_display (1); | |
4980 | do_pending_window_change (); | |
4981 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) | |
4982 | (*frame_up_to_date_hook) (f); | |
4983 | } | |
4984 | } | |
4985 | ||
4986 | ||
4987 | /* Display a null-terminated echo area message M. If M is 0, clear | |
4988 | out any existing message, and let the mini-buffer text show through. | |
4989 | ||
4990 | The buffer M must continue to exist until after the echo area gets | |
4991 | cleared or some other message gets displayed there. Do not pass | |
4992 | text that is stored in a Lisp string. Do not pass text in a buffer | |
4993 | that was alloca'd. */ | |
4994 | ||
4995 | void | |
4996 | message1 (m) | |
4997 | char *m; | |
4998 | { | |
4999 | message2 (m, (m ? strlen (m) : 0), 0); | |
5000 | } | |
5001 | ||
5002 | ||
5003 | /* The non-logging counterpart of message1. */ | |
5004 | ||
5005 | void | |
5006 | message1_nolog (m) | |
5007 | char *m; | |
5008 | { | |
5009 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5010 | } | |
5011 | ||
5012 | /* Display a message M which contains a single %s | |
5013 | which gets replaced with STRING. */ | |
5014 | ||
5015 | void | |
5016 | message_with_string (m, string, log) | |
5017 | char *m; | |
5018 | Lisp_Object string; | |
5019 | int log; | |
5020 | { | |
5021 | if (noninteractive) | |
5022 | { | |
5023 | if (m) | |
5024 | { | |
5025 | if (noninteractive_need_newline) | |
5026 | putc ('\n', stderr); | |
5027 | noninteractive_need_newline = 0; | |
5028 | fprintf (stderr, m, XSTRING (string)->data); | |
5029 | if (cursor_in_echo_area == 0) | |
5030 | fprintf (stderr, "\n"); | |
5031 | fflush (stderr); | |
5032 | } | |
5033 | } | |
5034 | else if (INTERACTIVE) | |
5035 | { | |
5036 | /* The frame whose minibuffer we're going to display the message on. | |
5037 | It may be larger than the selected frame, so we need | |
5038 | to use its buffer, not the selected frame's buffer. */ | |
5039 | Lisp_Object mini_window; | |
5040 | FRAME_PTR f; | |
5041 | ||
5042 | /* Get the frame containing the minibuffer | |
5043 | that the selected frame is using. */ | |
5044 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5045 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
5046 | ||
5047 | /* A null message buffer means that the frame hasn't really been | |
5048 | initialized yet. Error messages get reported properly by | |
5049 | cmd_error, so this must be just an informative message; toss it. */ | |
5050 | if (FRAME_MESSAGE_BUF (f)) | |
5051 | { | |
5052 | int len; | |
5053 | char *a[1]; | |
5054 | a[0] = (char *) XSTRING (string)->data; | |
5055 | ||
5056 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5057 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5058 | ||
5059 | if (log) | |
5060 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5061 | STRING_MULTIBYTE (string)); | |
5062 | else | |
5063 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5064 | STRING_MULTIBYTE (string)); | |
5065 | ||
5066 | /* Print should start at the beginning of the message | |
5067 | buffer next time. */ | |
5068 | message_buf_print = 0; | |
5069 | } | |
5070 | } | |
5071 | } | |
5072 | ||
5073 | ||
5074 | /* Truncate what will be displayed in the echo area | |
5075 | the next time we display it--but don't redisplay it now. */ | |
5076 | ||
5077 | void | |
5078 | truncate_echo_area (len) | |
5079 | int len; | |
5080 | { | |
5081 | /* A null message buffer means that the frame hasn't really been | |
5082 | initialized yet. Error messages get reported properly by | |
5083 | cmd_error, so this must be just an informative message; toss it. */ | |
5084 | if (!noninteractive && INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
5085 | echo_area_glyphs_length = len; | |
5086 | } | |
5087 | ||
5088 | ||
5089 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by | |
5090 | print; zero if being used by message. */ | |
5091 | ||
5092 | int message_buf_print; | |
5093 | ||
5094 | ||
5095 | /* Dump an informative message to the minibuf. If M is 0, clear out | |
5096 | any existing message, and let the mini-buffer text show through. */ | |
5097 | ||
5098 | /* VARARGS 1 */ | |
5099 | void | |
5100 | message (m, a1, a2, a3) | |
5101 | char *m; | |
5102 | EMACS_INT a1, a2, a3; | |
5103 | { | |
5104 | if (noninteractive) | |
5105 | { | |
5106 | if (m) | |
5107 | { | |
5108 | if (noninteractive_need_newline) | |
5109 | putc ('\n', stderr); | |
5110 | noninteractive_need_newline = 0; | |
5111 | fprintf (stderr, m, a1, a2, a3); | |
5112 | if (cursor_in_echo_area == 0) | |
5113 | fprintf (stderr, "\n"); | |
5114 | fflush (stderr); | |
5115 | } | |
5116 | } | |
5117 | else if (INTERACTIVE) | |
5118 | { | |
5119 | /* The frame whose mini-buffer we're going to display the message | |
5120 | on. It may be larger than the selected frame, so we need to | |
5121 | use its buffer, not the selected frame's buffer. */ | |
5122 | Lisp_Object mini_window; | |
5123 | struct frame *f; | |
5124 | ||
5125 | /* Get the frame containing the mini-buffer | |
5126 | that the selected frame is using. */ | |
5127 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5128 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
5129 | ||
5130 | /* A null message buffer means that the frame hasn't really been | |
5131 | initialized yet. Error messages get reported properly by | |
5132 | cmd_error, so this must be just an informative message; toss | |
5133 | it. */ | |
5134 | if (FRAME_MESSAGE_BUF (f)) | |
5135 | { | |
5136 | if (m) | |
5137 | { | |
5138 | int len; | |
5139 | #ifdef NO_ARG_ARRAY | |
5140 | char *a[3]; | |
5141 | a[0] = (char *) a1; | |
5142 | a[1] = (char *) a2; | |
5143 | a[2] = (char *) a3; | |
5144 | ||
5145 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5146 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5147 | #else | |
5148 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5149 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5150 | (char **) &a1); | |
5151 | #endif /* NO_ARG_ARRAY */ | |
5152 | ||
5153 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5154 | } | |
5155 | else | |
5156 | message1 (0); | |
5157 | ||
5158 | /* Print should start at the beginning of the message | |
5159 | buffer next time. */ | |
5160 | message_buf_print = 0; | |
5161 | } | |
5162 | } | |
5163 | } | |
5164 | ||
5165 | ||
5166 | /* The non-logging version of message. */ | |
5167 | ||
5168 | void | |
5169 | message_nolog (m, a1, a2, a3) | |
5170 | char *m; | |
5171 | EMACS_INT a1, a2, a3; | |
5172 | { | |
5173 | Lisp_Object old_log_max; | |
5174 | old_log_max = Vmessage_log_max; | |
5175 | Vmessage_log_max = Qnil; | |
5176 | message (m, a1, a2, a3); | |
5177 | Vmessage_log_max = old_log_max; | |
5178 | } | |
5179 | ||
5180 | ||
5181 | /* Display echo_area_message or echo_area_glyphs in the current | |
5182 | mini-buffer. */ | |
5183 | ||
5184 | void | |
5185 | update_echo_area () | |
5186 | { | |
5187 | if (STRINGP (echo_area_message)) | |
5188 | message3 (echo_area_message, echo_area_glyphs_length, | |
5189 | !NILP (current_buffer->enable_multibyte_characters)); | |
5190 | else | |
5191 | message2 (echo_area_glyphs, echo_area_glyphs_length, | |
5192 | !NILP (current_buffer->enable_multibyte_characters)); | |
5193 | } | |
5194 | ||
5195 | ||
5196 | /* Redisplay the echo area of selected_frame. If UPDATE_FRAME_P is | |
5197 | non-zero update selected_frame. */ | |
5198 | ||
5199 | static void | |
5200 | echo_area_display (update_frame_p) | |
5201 | int update_frame_p; | |
5202 | { | |
5203 | Lisp_Object mini_window; | |
5204 | struct window *w; | |
5205 | struct frame *f; | |
5206 | ||
5207 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5208 | w = XWINDOW (mini_window); | |
5209 | f = XFRAME (WINDOW_FRAME (w)); | |
5210 | ||
5211 | /* Don't display if frame is invisible or not yet initialized. */ | |
5212 | if (!FRAME_VISIBLE_P (f) | |
5213 | || !f->glyphs_initialized_p) | |
5214 | return; | |
5215 | ||
5216 | /* When Emacs starts, selected_frame may be a visible terminal | |
5217 | frame, even if we run under a window system. If we let this | |
5218 | through, a message would be displayed on the terminal. */ | |
5219 | #ifdef HAVE_WINDOW_SYSTEM | |
5220 | if (!inhibit_window_system && !FRAME_WINDOW_P (selected_frame)) | |
5221 | return; | |
5222 | #endif /* HAVE_WINDOW_SYSTEM */ | |
5223 | ||
5224 | /* Redraw garbaged frames. */ | |
5225 | if (frame_garbaged) | |
5226 | { | |
5227 | /* Old redisplay called redraw_garbaged_frames here which in | |
5228 | turn called redraw_frame which in turn called clear_frame. | |
5229 | The call to clear_frame is a source of flickering. After | |
5230 | checking the places where SET_FRAME_GARBAGED is called, I | |
5231 | believe a clear_frame is not necessary. It should suffice in | |
5232 | the new redisplay to invalidate all current matrices, and | |
5233 | ensure a complete redisplay of all windows. */ | |
5234 | Lisp_Object tail, frame; | |
5235 | ||
5236 | FOR_EACH_FRAME (tail, frame) | |
5237 | { | |
5238 | struct frame *f = XFRAME (frame); | |
5239 | ||
5240 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
5241 | { | |
5242 | clear_current_matrices (f); | |
5243 | f->garbaged = 0; | |
5244 | } | |
5245 | } | |
5246 | ||
5247 | frame_garbaged = 0; | |
5248 | ++windows_or_buffers_changed; | |
5249 | } | |
5250 | ||
5251 | if (echo_area_glyphs | |
5252 | || STRINGP (echo_area_message) | |
5253 | || minibuf_level == 0) | |
5254 | { | |
5255 | struct it it; | |
5256 | ||
5257 | echo_area_window = mini_window; | |
5258 | clear_glyph_matrix (w->desired_matrix); | |
5259 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, DEFAULT_FACE_ID); | |
5260 | ||
5261 | if (STRINGP (echo_area_message) | |
5262 | && echo_area_glyphs_length) | |
5263 | { | |
5264 | prepare_desired_row (it.glyph_row); | |
5265 | display_string (NULL, echo_area_message, Qnil, 0, 0, | |
5266 | &it, -1, echo_area_glyphs_length, 0, | |
5267 | message_enable_multibyte); | |
5268 | it.glyph_row->truncated_on_right_p = 0; | |
5269 | compute_line_metrics (&it); | |
5270 | } | |
5271 | else if (echo_area_glyphs | |
5272 | && echo_area_glyphs_length) | |
5273 | { | |
5274 | prepare_desired_row (it.glyph_row); | |
5275 | display_string (echo_area_glyphs, Qnil, Qnil, 0, 0, &it, | |
5276 | -1, echo_area_glyphs_length, 0, | |
5277 | message_enable_multibyte); | |
5278 | it.glyph_row->truncated_on_right_p = 0; | |
5279 | compute_line_metrics (&it); | |
5280 | } | |
5281 | else | |
5282 | blank_row (w, it.glyph_row, 0); | |
5283 | ||
5284 | it.glyph_row->y = it.current_y; | |
5285 | it.current_y += it.glyph_row->height; | |
5286 | ||
5287 | /* Clear the rest of the lines. */ | |
5288 | while (it.current_y < it.last_visible_y) | |
5289 | { | |
5290 | ++it.glyph_row; | |
5291 | blank_row (w, it.glyph_row, it.current_y); | |
5292 | it.current_y += it.glyph_row->height; | |
5293 | } | |
5294 | ||
5295 | w->must_be_updated_p = 1; | |
5296 | if (update_frame_p) | |
5297 | { | |
5298 | /* Calling update_single_window is faster when we can use | |
5299 | window-based redisplay. */ | |
5300 | if (FRAME_WINDOW_P (f)) | |
5301 | { | |
5302 | update_single_window (w, 1); | |
5303 | rif->flush_display (f); | |
5304 | } | |
5305 | else | |
5306 | update_frame (f, 1, 1); | |
5307 | } | |
5308 | } | |
5309 | else if (!EQ (mini_window, selected_window)) | |
5310 | windows_or_buffers_changed++; | |
5311 | ||
5312 | /* Prevent redisplay optimization in redisplay_internal by resetting | |
5313 | this_line_start_pos. This is done because the mini-buffer now | |
5314 | displays the message instead of its buffer text. */ | |
5315 | if (EQ (mini_window, selected_window)) | |
5316 | CHARPOS (this_line_start_pos) = 0; | |
5317 | ||
5318 | previous_echo_glyphs = echo_area_glyphs; | |
5319 | previous_echo_area_message = echo_area_message; | |
5320 | previous_echo_glyphs_length = echo_area_glyphs_length; | |
5321 | } | |
5322 | ||
5323 | ||
5324 | \f | |
5325 | /*********************************************************************** | |
5326 | Frame Titles | |
5327 | ***********************************************************************/ | |
5328 | ||
5329 | ||
5330 | #ifdef HAVE_WINDOW_SYSTEM | |
5331 | ||
5332 | /* A buffer for constructing frame titles in it; allocated from the | |
5333 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
5334 | ||
5335 | static char *frame_title_buf; | |
5336 | ||
5337 | /* The buffer's end, and a current output position in it. */ | |
5338 | ||
5339 | static char *frame_title_buf_end; | |
5340 | static char *frame_title_ptr; | |
5341 | ||
5342 | ||
5343 | /* Store a single character C for the frame title in frame_title_buf. | |
5344 | Re-allocate frame_title_buf if necessary. */ | |
5345 | ||
5346 | static void | |
5347 | store_frame_title_char (c) | |
5348 | char c; | |
5349 | { | |
5350 | /* If output position has reached the end of the allocated buffer, | |
5351 | double the buffer's size. */ | |
5352 | if (frame_title_ptr == frame_title_buf_end) | |
5353 | { | |
5354 | int len = frame_title_ptr - frame_title_buf; | |
5355 | int new_size = 2 * len * sizeof *frame_title_buf; | |
5356 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
5357 | frame_title_buf_end = frame_title_buf + new_size; | |
5358 | frame_title_ptr = frame_title_buf + len; | |
5359 | } | |
5360 | ||
5361 | *frame_title_ptr++ = c; | |
5362 | } | |
5363 | ||
5364 | ||
5365 | /* Store part of a frame title in frame_title_buf, beginning at | |
5366 | frame_title_ptr. STR is the string to store. Do not copy more | |
5367 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
5368 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
5369 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
5370 | Called from display_mode_element when it is used to build a frame | |
5371 | title. */ | |
5372 | ||
5373 | static int | |
5374 | store_frame_title (str, field_width, precision) | |
5375 | unsigned char *str; | |
5376 | int field_width, precision; | |
5377 | { | |
5378 | int n = 0; | |
5379 | ||
5380 | /* Copy at most PRECISION chars from STR. */ | |
5381 | while ((precision <= 0 || n < precision) | |
5382 | && *str) | |
5383 | { | |
5384 | store_frame_title_char (*str++); | |
5385 | ++n; | |
5386 | } | |
5387 | ||
5388 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
5389 | while (field_width > 0 | |
5390 | && n < field_width) | |
5391 | { | |
5392 | store_frame_title_char (' '); | |
5393 | ++n; | |
5394 | } | |
5395 | ||
5396 | return n; | |
5397 | } | |
5398 | ||
5399 | ||
5400 | /* Set the title of FRAME, if it has changed. The title format is | |
5401 | Vicon_title_format if FRAME is iconified, otherwise it is | |
5402 | frame_title_format. */ | |
5403 | ||
5404 | static void | |
5405 | x_consider_frame_title (frame) | |
5406 | Lisp_Object frame; | |
5407 | { | |
5408 | struct frame *f = XFRAME (frame); | |
5409 | ||
5410 | if (FRAME_WINDOW_P (f) | |
5411 | || FRAME_MINIBUF_ONLY_P (f) | |
5412 | || f->explicit_name) | |
5413 | { | |
5414 | /* Do we have more than one visible frame on this X display? */ | |
5415 | Lisp_Object tail; | |
5416 | Lisp_Object fmt; | |
5417 | struct buffer *obuf; | |
5418 | int len; | |
5419 | struct it it; | |
5420 | ||
5421 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5422 | { | |
5423 | struct frame *tf = XFRAME (XCONS (tail)->car); | |
5424 | ||
5425 | if (tf != f | |
5426 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
5427 | && !FRAME_MINIBUF_ONLY_P (tf) | |
5428 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
5429 | break; | |
5430 | } | |
5431 | ||
5432 | /* Set global variable indicating that multiple frames exist. */ | |
5433 | multiple_frames = CONSP (tail); | |
5434 | ||
5435 | /* Switch to the buffer of selected window of the frame. Set up | |
5436 | frame_title_ptr so that display_mode_element will output into it; | |
5437 | then display the title. */ | |
5438 | obuf = current_buffer; | |
5439 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
5440 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
5441 | frame_title_ptr = frame_title_buf; | |
5442 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
5443 | NULL, DEFAULT_FACE_ID); | |
5444 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
5445 | frame_title_ptr = NULL; | |
5446 | set_buffer_internal (obuf); | |
5447 | ||
5448 | /* Set the title only if it's changed. This avoids consing in | |
5449 | the common case where it hasn't. (If it turns out that we've | |
5450 | already wasted too much time by walking through the list with | |
5451 | display_mode_element, then we might need to optimize at a | |
5452 | higher level than this.) */ | |
5453 | if (! STRINGP (f->name) | |
5454 | || STRING_BYTES (XSTRING (f->name)) != len | |
5455 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
5456 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
5457 | } | |
5458 | } | |
5459 | ||
5460 | #else /* not HAVE_WINDOW_SYSTEM */ | |
5461 | ||
5462 | #define frame_title_ptr ((char *)0) | |
5463 | #define store_frame_title(str, mincol, maxcol) 0 | |
5464 | ||
5465 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
5466 | ||
5467 | ||
5468 | ||
5469 | \f | |
5470 | /*********************************************************************** | |
5471 | Menu Bars | |
5472 | ***********************************************************************/ | |
5473 | ||
5474 | ||
5475 | /* Prepare for redisplay by updating menu-bar item lists when | |
5476 | appropriate. This can call eval. */ | |
5477 | ||
5478 | void | |
5479 | prepare_menu_bars () | |
5480 | { | |
5481 | int all_windows; | |
5482 | struct gcpro gcpro1, gcpro2; | |
5483 | struct frame *f; | |
5484 | struct frame *tooltip_frame; | |
5485 | ||
5486 | #ifdef HAVE_X_WINDOWS | |
5487 | tooltip_frame = tip_frame; | |
5488 | #else | |
5489 | tooltip_frame = NULL; | |
5490 | #endif | |
5491 | ||
5492 | /* Update all frame titles based on their buffer names, etc. We do | |
5493 | this before the menu bars so that the buffer-menu will show the | |
5494 | up-to-date frame titles. */ | |
5495 | #ifdef HAVE_WINDOW_SYSTEM | |
5496 | if (windows_or_buffers_changed || update_mode_lines) | |
5497 | { | |
5498 | Lisp_Object tail, frame; | |
5499 | ||
5500 | FOR_EACH_FRAME (tail, frame) | |
5501 | { | |
5502 | f = XFRAME (frame); | |
5503 | if (f != tooltip_frame | |
5504 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
5505 | x_consider_frame_title (frame); | |
5506 | } | |
5507 | } | |
5508 | #endif /* HAVE_WINDOW_SYSTEM */ | |
5509 | ||
5510 | /* Update the menu bar item lists, if appropriate. This has to be | |
5511 | done before any actual redisplay or generation of display lines. */ | |
5512 | all_windows = (update_mode_lines | |
5513 | || buffer_shared > 1 | |
5514 | || windows_or_buffers_changed); | |
5515 | if (all_windows) | |
5516 | { | |
5517 | Lisp_Object tail, frame; | |
5518 | int count = specpdl_ptr - specpdl; | |
5519 | ||
5520 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
5521 | ||
5522 | FOR_EACH_FRAME (tail, frame) | |
5523 | { | |
5524 | f = XFRAME (frame); | |
5525 | ||
5526 | /* Ignore tooltip frame. */ | |
5527 | if (f == tooltip_frame) | |
5528 | continue; | |
5529 | ||
5530 | /* If a window on this frame changed size, report that to | |
5531 | the user and clear the size-change flag. */ | |
5532 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
5533 | { | |
5534 | Lisp_Object functions; | |
5535 | ||
5536 | /* Clear flag first in case we get an error below. */ | |
5537 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
5538 | functions = Vwindow_size_change_functions; | |
5539 | GCPRO2 (tail, functions); | |
5540 | ||
5541 | while (CONSP (functions)) | |
5542 | { | |
5543 | call1 (XCAR (functions), frame); | |
5544 | functions = XCDR (functions); | |
5545 | } | |
5546 | UNGCPRO; | |
5547 | } | |
5548 | ||
5549 | GCPRO1 (tail); | |
5550 | update_menu_bar (f, 0); | |
5551 | #ifdef HAVE_WINDOW_SYSTEM | |
5552 | update_toolbar (f, 0); | |
5553 | #endif | |
5554 | UNGCPRO; | |
5555 | } | |
5556 | ||
5557 | unbind_to (count, Qnil); | |
5558 | } | |
5559 | else | |
5560 | { | |
5561 | update_menu_bar (selected_frame, 1); | |
5562 | #ifdef HAVE_WINDOW_SYSTEM | |
5563 | update_toolbar (selected_frame, 1); | |
5564 | #endif | |
5565 | } | |
5566 | ||
5567 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
5568 | pending_menu_activation is not defined. */ | |
5569 | #ifdef USE_X_TOOLKIT | |
5570 | pending_menu_activation = 0; | |
5571 | #endif | |
5572 | } | |
5573 | ||
5574 | ||
5575 | /* Update the menu bar item list for frame F. This has to be done | |
5576 | before we start to fill in any display lines, because it can call | |
5577 | eval. | |
5578 | ||
5579 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
5580 | ||
5581 | static void | |
5582 | update_menu_bar (f, save_match_data) | |
5583 | struct frame *f; | |
5584 | int save_match_data; | |
5585 | { | |
5586 | Lisp_Object window; | |
5587 | register struct window *w; | |
5588 | ||
5589 | window = FRAME_SELECTED_WINDOW (f); | |
5590 | w = XWINDOW (window); | |
5591 | ||
5592 | if (update_mode_lines) | |
5593 | w->update_mode_line = Qt; | |
5594 | ||
5595 | if (FRAME_WINDOW_P (f) | |
5596 | ? | |
5597 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
5598 | FRAME_EXTERNAL_MENU_BAR (f) | |
5599 | #else | |
5600 | FRAME_MENU_BAR_LINES (f) > 0 | |
5601 | #endif | |
5602 | : FRAME_MENU_BAR_LINES (f) > 0) | |
5603 | { | |
5604 | /* If the user has switched buffers or windows, we need to | |
5605 | recompute to reflect the new bindings. But we'll | |
5606 | recompute when update_mode_lines is set too; that means | |
5607 | that people can use force-mode-line-update to request | |
5608 | that the menu bar be recomputed. The adverse effect on | |
5609 | the rest of the redisplay algorithm is about the same as | |
5610 | windows_or_buffers_changed anyway. */ | |
5611 | if (windows_or_buffers_changed | |
5612 | || !NILP (w->update_mode_line) | |
5613 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
5614 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
5615 | != !NILP (w->last_had_star)) | |
5616 | || ((!NILP (Vtransient_mark_mode) | |
5617 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
5618 | != !NILP (w->region_showing))) | |
5619 | { | |
5620 | struct buffer *prev = current_buffer; | |
5621 | int count = specpdl_ptr - specpdl; | |
5622 | ||
5623 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5624 | if (save_match_data) | |
5625 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
5626 | if (NILP (Voverriding_local_map_menu_flag)) | |
5627 | { | |
5628 | specbind (Qoverriding_terminal_local_map, Qnil); | |
5629 | specbind (Qoverriding_local_map, Qnil); | |
5630 | } | |
5631 | ||
5632 | /* Run the Lucid hook. */ | |
5633 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
5634 | ||
5635 | /* If it has changed current-menubar from previous value, | |
5636 | really recompute the menu-bar from the value. */ | |
5637 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
5638 | call0 (Qrecompute_lucid_menubar); | |
5639 | ||
5640 | safe_run_hooks (Qmenu_bar_update_hook); | |
5641 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
5642 | ||
5643 | /* Redisplay the menu bar in case we changed it. */ | |
5644 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
5645 | if (FRAME_WINDOW_P (f)) | |
5646 | set_frame_menubar (f, 0, 0); | |
5647 | else | |
5648 | /* On a terminal screen, the menu bar is an ordinary screen | |
5649 | line, and this makes it get updated. */ | |
5650 | w->update_mode_line = Qt; | |
5651 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
5652 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
5653 | line, and this makes it get updated. */ | |
5654 | w->update_mode_line = Qt; | |
5655 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
5656 | ||
5657 | unbind_to (count, Qnil); | |
5658 | set_buffer_internal_1 (prev); | |
5659 | } | |
5660 | } | |
5661 | } | |
5662 | ||
5663 | ||
5664 | \f | |
5665 | /*********************************************************************** | |
5666 | Toolbars | |
5667 | ***********************************************************************/ | |
5668 | ||
5669 | #ifdef HAVE_WINDOW_SYSTEM | |
5670 | ||
5671 | /* Update the toolbar item list for frame F. This has to be done | |
5672 | before we start to fill in any display lines. Called from | |
5673 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
5674 | and restore it here. */ | |
5675 | ||
5676 | static void | |
5677 | update_toolbar (f, save_match_data) | |
5678 | struct frame *f; | |
5679 | int save_match_data; | |
5680 | { | |
5681 | if (WINDOWP (f->toolbar_window) | |
5682 | && XFASTINT (XWINDOW (f->toolbar_window)->height) > 0) | |
5683 | { | |
5684 | Lisp_Object window; | |
5685 | struct window *w; | |
5686 | ||
5687 | window = FRAME_SELECTED_WINDOW (f); | |
5688 | w = XWINDOW (window); | |
5689 | ||
5690 | /* If the user has switched buffers or windows, we need to | |
5691 | recompute to reflect the new bindings. But we'll | |
5692 | recompute when update_mode_lines is set too; that means | |
5693 | that people can use force-mode-line-update to request | |
5694 | that the menu bar be recomputed. The adverse effect on | |
5695 | the rest of the redisplay algorithm is about the same as | |
5696 | windows_or_buffers_changed anyway. */ | |
5697 | if (windows_or_buffers_changed | |
5698 | || !NILP (w->update_mode_line) | |
5699 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
5700 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
5701 | != !NILP (w->last_had_star)) | |
5702 | || ((!NILP (Vtransient_mark_mode) | |
5703 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
5704 | != !NILP (w->region_showing))) | |
5705 | { | |
5706 | struct buffer *prev = current_buffer; | |
5707 | int count = specpdl_ptr - specpdl; | |
a2889657 | 5708 | |
5f5c8ee5 GM |
5709 | /* Set current_buffer to the buffer of the selected |
5710 | window of the frame, so that we get the right local | |
5711 | keymaps. */ | |
5712 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 5713 | |
5f5c8ee5 GM |
5714 | /* Save match data, if we must. */ |
5715 | if (save_match_data) | |
5716 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
5717 | ||
5718 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
5719 | if (NILP (Voverriding_local_map_menu_flag)) | |
5720 | { | |
5721 | specbind (Qoverriding_terminal_local_map, Qnil); | |
5722 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 5723 | } |
1f40cad2 | 5724 | |
5f5c8ee5 GM |
5725 | /* Build desired toolbar items from keymaps. */ |
5726 | f->desired_toolbar_items | |
5727 | = toolbar_items (f->desired_toolbar_items, | |
5728 | &f->n_desired_toolbar_items); | |
5729 | ||
5730 | /* Redisplay the toolbar in case we changed it. */ | |
5731 | w->update_mode_line = Qt; | |
5732 | ||
5733 | unbind_to (count, Qnil); | |
5734 | set_buffer_internal_1 (prev); | |
81d478f3 | 5735 | } |
a2889657 JB |
5736 | } |
5737 | } | |
5738 | ||
6c4429a5 | 5739 | |
5f5c8ee5 GM |
5740 | /* Set F->desired_toolbar_string to a Lisp string representing frame |
5741 | F's desired toolbar contents. F->desired_toolbar_items must have | |
5742 | been set up previously by calling prepare_menu_bars. */ | |
5743 | ||
a2889657 | 5744 | static void |
5f5c8ee5 GM |
5745 | build_desired_toolbar_string (f) |
5746 | struct frame *f; | |
a2889657 | 5747 | { |
5f5c8ee5 GM |
5748 | int i, size, size_needed, string_idx; |
5749 | struct gcpro gcpro1, gcpro2, gcpro3; | |
5750 | Lisp_Object image, plist, props; | |
a2889657 | 5751 | |
5f5c8ee5 GM |
5752 | image = plist = props = Qnil; |
5753 | GCPRO3 (image, plist, props); | |
a2889657 | 5754 | |
5f5c8ee5 GM |
5755 | /* Prepare F->desired_toolbar_string. If we can reuse it, do so. |
5756 | Otherwise, make a new string. */ | |
5757 | ||
5758 | /* The size of the string we might be able to reuse. */ | |
5759 | size = (STRINGP (f->desired_toolbar_string) | |
5760 | ? XSTRING (f->desired_toolbar_string)->size | |
5761 | : 0); | |
5762 | ||
5763 | /* Each image in the string we build is preceded by a space, | |
5764 | and there is a space at the end. */ | |
5765 | size_needed = f->n_desired_toolbar_items + 1; | |
5766 | ||
5767 | /* Reuse f->desired_toolbar_string, if possible. */ | |
5768 | if (size < size_needed) | |
5769 | f->desired_toolbar_string = Fmake_string (make_number (size_needed), ' '); | |
5770 | else | |
5771 | { | |
5772 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
5773 | Fremove_text_properties (make_number (0), make_number (size), | |
5774 | props, f->desired_toolbar_string); | |
5775 | } | |
a2889657 | 5776 | |
5f5c8ee5 GM |
5777 | /* Put a `display' property on the string for the images to display, |
5778 | put a `menu_item' property on toolbar items with a value that | |
5779 | is the index of the item in F's toolbar item vector. */ | |
5780 | for (i = 0, string_idx = 0; | |
5781 | i < f->n_desired_toolbar_items; | |
5782 | ++i, string_idx += 1) | |
a2889657 | 5783 | { |
5f5c8ee5 GM |
5784 | #define PROP(IDX) \ |
5785 | (XVECTOR (f->desired_toolbar_items) \ | |
5786 | ->contents[i * TOOLBAR_ITEM_NSLOTS + (IDX)]) | |
5787 | ||
5788 | int enabled_p = !NILP (PROP (TOOLBAR_ITEM_ENABLED_P)); | |
5789 | int selected_p = !NILP (PROP (TOOLBAR_ITEM_SELECTED_P)); | |
5790 | int margin, relief; | |
5791 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; | |
5792 | extern Lisp_Object Qlaplace; | |
5793 | ||
5794 | /* If image is a vector, choose the image according to the | |
5795 | button state. */ | |
5796 | image = PROP (TOOLBAR_ITEM_IMAGES); | |
5797 | if (VECTORP (image)) | |
5798 | { | |
5799 | enum toolbar_item_image idx; | |
5800 | ||
5801 | if (enabled_p) | |
5802 | idx = (selected_p | |
5803 | ? TOOLBAR_IMAGE_ENABLED_SELECTED | |
5804 | : TOOLBAR_IMAGE_ENABLED_DESELECTED); | |
5805 | else | |
5806 | idx = (selected_p | |
5807 | ? TOOLBAR_IMAGE_DISABLED_SELECTED | |
5808 | : TOOLBAR_IMAGE_DISABLED_DESELECTED); | |
5809 | ||
5810 | xassert (XVECTOR (image)->size >= idx); | |
5811 | image = XVECTOR (image)->contents[idx]; | |
5812 | } | |
5813 | ||
5814 | /* Ignore invalid image specifications. */ | |
5815 | if (!valid_image_p (image)) | |
5816 | continue; | |
5817 | ||
5818 | /* Display the toolbar button pressed, or depressed. */ | |
5819 | plist = Fcopy_sequence (XCDR (image)); | |
5820 | ||
5821 | /* Compute margin and relief to draw. */ | |
5822 | relief = toolbar_button_relief > 0 ? toolbar_button_relief : 3; | |
5823 | margin = relief + max (0, toolbar_button_margin); | |
5824 | ||
5825 | if (auto_raise_toolbar_buttons_p) | |
5826 | { | |
5827 | /* Add a `:relief' property to the image spec if the item is | |
5828 | selected. */ | |
5829 | if (selected_p) | |
5830 | { | |
5831 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
5832 | margin -= relief; | |
5833 | } | |
5834 | } | |
5835 | else | |
5836 | { | |
5837 | /* If image is selected, display it pressed, i.e. with a | |
5838 | negative relief. If it's not selected, display it with a | |
5839 | raised relief. */ | |
5840 | plist = Fplist_put (plist, QCrelief, | |
5841 | (selected_p | |
5842 | ? make_number (-relief) | |
5843 | : make_number (relief))); | |
5844 | margin -= relief; | |
5845 | } | |
5846 | ||
5847 | /* Put a margin around the image. */ | |
5848 | if (margin) | |
5849 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
5850 | ||
5851 | /* If button is not enabled, make the image appear disabled by | |
5852 | applying an appropriate algorithm to it. */ | |
5853 | if (!enabled_p) | |
5854 | plist = Fplist_put (plist, QCalgorithm, Qlaplace); | |
5855 | ||
5856 | /* Put a `display' text property on the string for the image to | |
5857 | display. Put a `menu-item' property on the string that gives | |
5858 | the start of this item's properties in the toolbar items | |
5859 | vector. */ | |
5860 | image = Fcons (Qimage, plist); | |
5861 | props = list4 (Qdisplay, image, | |
5862 | Qmenu_item, make_number (i * TOOLBAR_ITEM_NSLOTS)), | |
5863 | Fadd_text_properties (make_number (string_idx), | |
5864 | make_number (string_idx + 1), | |
5865 | props, f->desired_toolbar_string); | |
5866 | #undef PROP | |
a2889657 JB |
5867 | } |
5868 | ||
5f5c8ee5 GM |
5869 | UNGCPRO; |
5870 | } | |
5871 | ||
5872 | ||
5873 | /* Display one line of the toolbar of frame IT->f. */ | |
5874 | ||
5875 | static void | |
5876 | display_toolbar_line (it) | |
5877 | struct it *it; | |
5878 | { | |
5879 | struct glyph_row *row = it->glyph_row; | |
5880 | int max_x = it->last_visible_x; | |
5881 | struct glyph *last; | |
5882 | ||
5883 | prepare_desired_row (row); | |
5884 | row->y = it->current_y; | |
5885 | ||
5886 | while (it->current_x < max_x) | |
a2889657 | 5887 | { |
5f5c8ee5 | 5888 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 5889 | |
5f5c8ee5 GM |
5890 | /* Get the next display element. */ |
5891 | if (!get_next_display_element (it)) | |
5892 | break; | |
73af359d | 5893 | |
5f5c8ee5 GM |
5894 | /* Produce glyphs. */ |
5895 | x_before = it->current_x; | |
5896 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
5897 | PRODUCE_GLYPHS (it); | |
daa37602 | 5898 | |
5f5c8ee5 GM |
5899 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
5900 | i = 0; | |
5901 | x = x_before; | |
5902 | while (i < nglyphs) | |
5903 | { | |
5904 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
5905 | ||
5906 | if (x + glyph->pixel_width > max_x) | |
5907 | { | |
5908 | /* Glyph doesn't fit on line. */ | |
5909 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
5910 | it->current_x = x; | |
5911 | goto out; | |
5912 | } | |
daa37602 | 5913 | |
5f5c8ee5 GM |
5914 | ++it->hpos; |
5915 | x += glyph->pixel_width; | |
5916 | ++i; | |
5917 | } | |
5918 | ||
5919 | /* Stop at line ends. */ | |
5920 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5921 | break; | |
5922 | ||
5923 | set_iterator_to_next (it); | |
a2889657 | 5924 | } |
a2889657 | 5925 | |
5f5c8ee5 | 5926 | out:; |
a2889657 | 5927 | |
5f5c8ee5 GM |
5928 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
5929 | extend_face_to_end_of_line (it); | |
5930 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
5931 | last->right_box_line_p = 1; | |
5932 | compute_line_metrics (it); | |
5933 | ||
5934 | /* If line is empty, make it occupy the rest of the toolbar. */ | |
5935 | if (!row->displays_text_p) | |
5936 | { | |
312246d1 GM |
5937 | row->height = row->phys_height = it->last_visible_y - row->y; |
5938 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
5939 | } |
5940 | ||
5941 | row->full_width_p = 1; | |
5942 | row->continued_p = 0; | |
5943 | row->truncated_on_left_p = 0; | |
5944 | row->truncated_on_right_p = 0; | |
5945 | ||
5946 | it->current_x = it->hpos = 0; | |
5947 | it->current_y += row->height; | |
5948 | ++it->vpos; | |
5949 | ++it->glyph_row; | |
a2889657 | 5950 | } |
96a410bc | 5951 | |
5f5c8ee5 GM |
5952 | |
5953 | /* Value is the number of screen lines needed to make all toolbar | |
5954 | items of frame F visible. */ | |
96a410bc | 5955 | |
d39b6696 | 5956 | static int |
5f5c8ee5 GM |
5957 | toolbar_lines_needed (f) |
5958 | struct frame *f; | |
d39b6696 | 5959 | { |
5f5c8ee5 GM |
5960 | struct window *w = XWINDOW (f->toolbar_window); |
5961 | struct it it; | |
5962 | ||
5963 | /* Initialize an iterator for iteration over F->desired_toolbar_string | |
5964 | in the toolbar window of frame F. */ | |
5965 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOLBAR_FACE_ID); | |
5966 | it.first_visible_x = 0; | |
5967 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
5968 | reseat_to_string (&it, NULL, f->desired_toolbar_string, 0, 0, 0, -1); | |
5969 | ||
5970 | while (!ITERATOR_AT_END_P (&it)) | |
5971 | { | |
5972 | it.glyph_row = w->desired_matrix->rows; | |
5973 | clear_glyph_row (it.glyph_row); | |
5974 | display_toolbar_line (&it); | |
5975 | } | |
5976 | ||
5977 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 5978 | } |
96a410bc | 5979 | |
5f5c8ee5 GM |
5980 | |
5981 | /* Display the toolbar of frame F. Value is non-zero if toolbar's | |
5982 | height should be changed. */ | |
5983 | ||
5984 | static int | |
5985 | redisplay_toolbar (f) | |
5986 | struct frame *f; | |
96a410bc | 5987 | { |
5f5c8ee5 GM |
5988 | struct window *w; |
5989 | struct it it; | |
5990 | struct glyph_row *row; | |
5991 | int change_height_p = 0; | |
5992 | ||
5993 | /* If frame hasn't a toolbar window or if it is zero-height, don't | |
5994 | do anything. This means you must start with toolbar-lines | |
5995 | non-zero to get the auto-sizing effect. Or in other words, you | |
5996 | can turn off toolbars by specifying toolbar-lines zero. */ | |
5997 | if (!WINDOWP (f->toolbar_window) | |
5998 | || (w = XWINDOW (f->toolbar_window), | |
5999 | XFASTINT (w->height) == 0)) | |
6000 | return 0; | |
96a410bc | 6001 | |
5f5c8ee5 GM |
6002 | /* Set up an iterator for the toolbar window. */ |
6003 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOLBAR_FACE_ID); | |
6004 | it.first_visible_x = 0; | |
6005 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6006 | row = it.glyph_row; | |
3450d04c | 6007 | |
5f5c8ee5 GM |
6008 | /* Build a string that represents the contents of the toolbar. */ |
6009 | build_desired_toolbar_string (f); | |
6010 | reseat_to_string (&it, NULL, f->desired_toolbar_string, 0, 0, 0, -1); | |
3450d04c | 6011 | |
5f5c8ee5 GM |
6012 | /* Display as many lines as needed to display all toolbar items. */ |
6013 | while (it.current_y < it.last_visible_y) | |
6014 | display_toolbar_line (&it); | |
3450d04c | 6015 | |
5f5c8ee5 GM |
6016 | /* It doesn't make much sense to try scrolling in the toolbar |
6017 | window, so don't do it. */ | |
6018 | w->desired_matrix->no_scrolling_p = 1; | |
6019 | w->must_be_updated_p = 1; | |
3450d04c | 6020 | |
5f5c8ee5 GM |
6021 | if (auto_resize_toolbars_p) |
6022 | { | |
6023 | int nlines; | |
6024 | ||
6025 | /* If there are blank lines at the end, except for a partially | |
6026 | visible blank line at the end that is smaller than | |
6027 | CANON_Y_UNIT, change the toolbar's height. */ | |
6028 | row = it.glyph_row - 1; | |
6029 | if (!row->displays_text_p | |
6030 | && row->height >= CANON_Y_UNIT (f)) | |
6031 | change_height_p = 1; | |
6032 | ||
6033 | /* If row displays toolbar items, but is partially visible, | |
6034 | change the toolbar's height. */ | |
6035 | if (row->displays_text_p | |
6036 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
6037 | change_height_p = 1; | |
6038 | ||
6039 | /* Resize windows as needed by changing the `toolbar-lines' | |
6040 | frame parameter. */ | |
6041 | if (change_height_p | |
6042 | && (nlines = toolbar_lines_needed (f), | |
6043 | nlines != XFASTINT (w->height))) | |
6044 | { | |
6045 | extern Lisp_Object Qtoolbar_lines; | |
6046 | Lisp_Object frame; | |
6047 | ||
6048 | XSETFRAME (frame, f); | |
6049 | clear_glyph_matrix (w->desired_matrix); | |
6050 | Fmodify_frame_parameters (frame, | |
6051 | Fcons (Fcons (Qtoolbar_lines, | |
6052 | make_number (nlines)), | |
6053 | Qnil)); | |
6054 | fonts_changed_p = 1; | |
6055 | } | |
6056 | } | |
3450d04c | 6057 | |
5f5c8ee5 | 6058 | return change_height_p; |
96a410bc | 6059 | } |
90adcf20 | 6060 | |
5f5c8ee5 GM |
6061 | |
6062 | /* Get information about the toolbar item which is displayed in GLYPH | |
6063 | on frame F. Return in *PROP_IDX the index where toolbar item | |
6064 | properties start in F->current_toolbar_items. Value is zero if | |
6065 | GLYPH doesn't display a toolbar item. */ | |
6066 | ||
6067 | int | |
6068 | toolbar_item_info (f, glyph, prop_idx) | |
6069 | struct frame *f; | |
6070 | struct glyph *glyph; | |
6071 | int *prop_idx; | |
90adcf20 | 6072 | { |
5f5c8ee5 GM |
6073 | Lisp_Object prop; |
6074 | int success_p; | |
6075 | ||
6076 | /* Get the text property `menu-item' at pos. The value of that | |
6077 | property is the start index of this item's properties in | |
6078 | F->current_toolbar_items. */ | |
6079 | prop = Fget_text_property (make_number (glyph->charpos), | |
6080 | Qmenu_item, f->current_toolbar_string); | |
6081 | if (INTEGERP (prop)) | |
6082 | { | |
6083 | *prop_idx = XINT (prop); | |
6084 | success_p = 1; | |
6085 | } | |
6086 | else | |
6087 | success_p = 0; | |
90adcf20 | 6088 | |
5f5c8ee5 GM |
6089 | return success_p; |
6090 | } | |
6091 | ||
6092 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 6093 | |
feb0c42f | 6094 | |
5f5c8ee5 GM |
6095 | \f |
6096 | /************************************************************************ | |
6097 | Horizontal scrolling | |
6098 | ************************************************************************/ | |
feb0c42f | 6099 | |
5f5c8ee5 GM |
6100 | static int hscroll_window_tree P_ ((Lisp_Object)); |
6101 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 6102 | |
5f5c8ee5 GM |
6103 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
6104 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
6105 | that it is not within a certain margin at the window's left and | |
6106 | right border. Value is non-zero if any window's hscroll has been | |
6107 | changed. */ | |
6108 | ||
6109 | static int | |
6110 | hscroll_window_tree (window) | |
6111 | Lisp_Object window; | |
6112 | { | |
6113 | int hscrolled_p = 0; | |
6114 | ||
6115 | while (WINDOWP (window)) | |
90adcf20 | 6116 | { |
5f5c8ee5 GM |
6117 | struct window *w = XWINDOW (window); |
6118 | ||
6119 | if (WINDOWP (w->hchild)) | |
6120 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
6121 | else if (WINDOWP (w->vchild)) | |
6122 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
6123 | else if (w->cursor.vpos >= 0) | |
6124 | { | |
6125 | int hscroll_margin, text_area_x, text_area_y; | |
6126 | int text_area_width, text_area_height; | |
6127 | struct glyph_row *cursor_row = MATRIX_ROW (w->current_matrix, | |
6128 | w->cursor.vpos); | |
a2725ab2 | 6129 | |
5f5c8ee5 GM |
6130 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
6131 | &text_area_width, &text_area_height); | |
90adcf20 | 6132 | |
5f5c8ee5 GM |
6133 | /* Scroll when cursor is inside this scroll margin. */ |
6134 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
6135 | ||
6136 | if ((XFASTINT (w->hscroll) | |
6137 | && w->cursor.x < hscroll_margin) | |
6138 | || (cursor_row->truncated_on_right_p | |
6139 | && (w->cursor.x > text_area_width - hscroll_margin))) | |
08b610e4 | 6140 | { |
5f5c8ee5 GM |
6141 | struct it it; |
6142 | int hscroll; | |
6143 | struct buffer *saved_current_buffer; | |
6144 | int pt; | |
6145 | ||
6146 | /* Find point in a display of infinite width. */ | |
6147 | saved_current_buffer = current_buffer; | |
6148 | current_buffer = XBUFFER (w->buffer); | |
6149 | ||
6150 | if (w == XWINDOW (selected_window)) | |
6151 | pt = BUF_PT (current_buffer); | |
6152 | else | |
08b610e4 | 6153 | { |
5f5c8ee5 GM |
6154 | pt = marker_position (w->pointm); |
6155 | pt = max (BEGV, pt); | |
6156 | pt = min (ZV, pt); | |
6157 | } | |
6158 | ||
6159 | /* Move iterator to pt starting at cursor_row->start in | |
6160 | a line with infinite width. */ | |
6161 | init_to_row_start (&it, w, cursor_row); | |
6162 | it.last_visible_x = INFINITY; | |
6163 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
6164 | current_buffer = saved_current_buffer; | |
6165 | ||
6166 | /* Center cursor in window. */ | |
6167 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
6168 | / CANON_X_UNIT (it.f)); | |
6169 | ||
6170 | /* Don't call Fset_window_hscroll if value hasn't | |
6171 | changed because it will prevent redisplay | |
6172 | optimizations. */ | |
6173 | if (XFASTINT (w->hscroll) != hscroll) | |
6174 | { | |
6175 | Fset_window_hscroll (window, make_number (hscroll)); | |
6176 | hscrolled_p = 1; | |
08b610e4 | 6177 | } |
08b610e4 | 6178 | } |
08b610e4 | 6179 | } |
a2725ab2 | 6180 | |
5f5c8ee5 | 6181 | window = w->next; |
90adcf20 | 6182 | } |
cd6dfed6 | 6183 | |
5f5c8ee5 GM |
6184 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
6185 | return hscrolled_p; | |
6186 | } | |
6187 | ||
6188 | ||
6189 | /* Set hscroll so that cursor is visible and not inside horizontal | |
6190 | scroll margins for all windows in the tree rooted at WINDOW. See | |
6191 | also hscroll_window_tree above. Value is non-zero if any window's | |
6192 | hscroll has been changed. If it has, desired matrices on the frame | |
6193 | of WINDOW are cleared. */ | |
6194 | ||
6195 | static int | |
6196 | hscroll_windows (window) | |
6197 | Lisp_Object window; | |
6198 | { | |
6199 | int hscrolled_p = hscroll_window_tree (window); | |
6200 | if (hscrolled_p) | |
6201 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
6202 | return hscrolled_p; | |
90adcf20 | 6203 | } |
5f5c8ee5 GM |
6204 | |
6205 | ||
90adcf20 | 6206 | \f |
5f5c8ee5 GM |
6207 | /************************************************************************ |
6208 | Redisplay | |
6209 | ************************************************************************/ | |
6210 | ||
6211 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
6212 | to a non-zero value. This is sometimes handy to have in a debugger | |
6213 | session. */ | |
6214 | ||
6215 | #if GLYPH_DEBUG | |
a2889657 | 6216 | |
5f5c8ee5 GM |
6217 | /* Values of beg_unchanged and end_unchanged as of last call to |
6218 | try_window_id. */ | |
6219 | ||
6220 | int debug_beg_unchanged, debug_end_unchanged; | |
6221 | ||
6222 | /* First and last unchanged row for try_window_id. */ | |
6223 | ||
6224 | int debug_first_unchanged_at_end_vpos; | |
6225 | int debug_last_unchanged_at_beg_vpos; | |
6226 | ||
6227 | /* Delta vpos and y. */ | |
6228 | ||
6229 | int debug_dvpos, debug_dy; | |
6230 | ||
6231 | /* Delta in characters and bytes for try_window_id. */ | |
6232 | ||
6233 | int debug_delta, debug_delta_bytes; | |
6234 | ||
6235 | /* Values of window_end_pos and window_end_vpos at the end of | |
6236 | try_window_id. */ | |
6237 | ||
6238 | int debug_end_pos, debug_end_vpos; | |
6239 | ||
6240 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
6241 | format string. A1...A9 are a supplement for a variable-length | |
6242 | argument list. If trace_redisplay_p is non-zero also printf the | |
6243 | resulting string to stderr. */ | |
6244 | ||
6245 | static void | |
6246 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
6247 | struct window *w; | |
6248 | char *fmt; | |
6249 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
6250 | { | |
6251 | char buffer[512]; | |
6252 | char *method = w->desired_matrix->method; | |
6253 | int len = strlen (method); | |
6254 | int size = sizeof w->desired_matrix->method; | |
6255 | int remaining = size - len - 1; | |
6256 | ||
6257 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
6258 | if (len && remaining) | |
6259 | { | |
6260 | method[len] = '|'; | |
6261 | --remaining, ++len; | |
6262 | } | |
6263 | ||
6264 | strncpy (method + len, buffer, remaining); | |
6265 | ||
6266 | if (trace_redisplay_p) | |
6267 | fprintf (stderr, "%p (%s): %s\n", | |
6268 | w, | |
6269 | ((BUFFERP (w->buffer) | |
6270 | && STRINGP (XBUFFER (w->buffer)->name)) | |
6271 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
6272 | : "no buffer"), | |
6273 | buffer); | |
6274 | } | |
a2889657 | 6275 | |
5f5c8ee5 | 6276 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 6277 | |
a2889657 | 6278 | |
5f5c8ee5 GM |
6279 | /* This counter is used to clear the face cache every once in a while |
6280 | in redisplay_internal. It is incremented for each redisplay. | |
6281 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
6282 | cleared. */ | |
0d231165 | 6283 | |
5f5c8ee5 | 6284 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
6285 | static int clear_face_cache_count; |
6286 | ||
20de20dc | 6287 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
6288 | |
6289 | static struct frame *previous_terminal_frame; | |
6290 | ||
6291 | /* Non-zero while redisplay_internal is in progress. */ | |
6292 | ||
6293 | int redisplaying_p; | |
6294 | ||
6295 | ||
6296 | /* Value is non-zero if all changes in window W, which displays | |
6297 | current_buffer, are in the text between START and END. START is a | |
6298 | buffer position, END is given as a distance from Z. Used in | |
6299 | redisplay_internal for display optimization. */ | |
6300 | ||
6301 | static INLINE int | |
6302 | text_outside_line_unchanged_p (w, start, end) | |
6303 | struct window *w; | |
6304 | int start, end; | |
6305 | { | |
6306 | int unchanged_p = 1; | |
6307 | ||
6308 | /* If text or overlays have changed, see where. */ | |
6309 | if (XFASTINT (w->last_modified) < MODIFF | |
6310 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
6311 | { | |
6312 | /* Gap in the line? */ | |
6313 | if (GPT < start || Z - GPT < end) | |
6314 | unchanged_p = 0; | |
6315 | ||
6316 | /* Changes start in front of the line, or end after it? */ | |
6317 | if (unchanged_p | |
6318 | && (beg_unchanged < start - 1 | |
6319 | || end_unchanged < end)) | |
6320 | unchanged_p = 0; | |
6321 | ||
6322 | /* If selective display, can't optimize if changes start at the | |
6323 | beginning of the line. */ | |
6324 | if (unchanged_p | |
6325 | && INTEGERP (current_buffer->selective_display) | |
6326 | && XINT (current_buffer->selective_display) > 0 | |
6327 | && (beg_unchanged < start || GPT <= start)) | |
6328 | unchanged_p = 0; | |
6329 | } | |
6330 | ||
6331 | return unchanged_p; | |
6332 | } | |
6333 | ||
6334 | ||
6335 | /* Do a frame update, taking possible shortcuts into account. This is | |
6336 | the main external entry point for redisplay. | |
6337 | ||
6338 | If the last redisplay displayed an echo area message and that message | |
6339 | is no longer requested, we clear the echo area or bring back the | |
6340 | mini-buffer if that is in use. */ | |
20de20dc | 6341 | |
a2889657 JB |
6342 | void |
6343 | redisplay () | |
e9874cee RS |
6344 | { |
6345 | redisplay_internal (0); | |
6346 | } | |
6347 | ||
5f5c8ee5 GM |
6348 | |
6349 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in | |
6350 | response to any user action; therefore, we should preserve the echo | |
6351 | area. (Actually, our caller does that job.) Perhaps in the future | |
6352 | avoid recentering windows if it is not necessary; currently that | |
6353 | causes some problems. */ | |
e9874cee RS |
6354 | |
6355 | static void | |
6356 | redisplay_internal (preserve_echo_area) | |
6357 | int preserve_echo_area; | |
a2889657 | 6358 | { |
5f5c8ee5 GM |
6359 | struct window *w = XWINDOW (selected_window); |
6360 | struct frame *f = XFRAME (w->frame); | |
6361 | int pause; | |
a2889657 | 6362 | int must_finish = 0; |
5f5c8ee5 | 6363 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 6364 | int number_of_visible_frames; |
a2889657 | 6365 | |
5f5c8ee5 GM |
6366 | /* Non-zero means redisplay has to consider all windows on all |
6367 | frames. Zero means, only selected_window is considered. */ | |
6368 | int consider_all_windows_p; | |
6369 | ||
6370 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
6371 | ||
6372 | /* No redisplay if running in batch mode or frame is not yet fully | |
6373 | initialized, or redisplay is explicitly turned off by setting | |
6374 | Vinhibit_redisplay. */ | |
6375 | if (noninteractive | |
6376 | || !NILP (Vinhibit_redisplay) | |
6377 | || !f->glyphs_initialized_p) | |
a2889657 JB |
6378 | return; |
6379 | ||
5f5c8ee5 GM |
6380 | /* The flag redisplay_performed_directly_p is set by |
6381 | direct_output_for_insert when it already did the whole screen | |
6382 | update necessary. */ | |
6383 | if (redisplay_performed_directly_p) | |
6384 | { | |
6385 | redisplay_performed_directly_p = 0; | |
6386 | if (!hscroll_windows (selected_window)) | |
6387 | return; | |
6388 | } | |
6389 | ||
15f0cf78 RS |
6390 | #ifdef USE_X_TOOLKIT |
6391 | if (popup_activated ()) | |
6392 | return; | |
6393 | #endif | |
6394 | ||
5f5c8ee5 | 6395 | if (redisplaying_p) |
735c094c | 6396 | return; |
5f5c8ee5 | 6397 | ++redisplaying_p; |
735c094c | 6398 | |
8b32d885 RS |
6399 | retry: |
6400 | ||
5f5c8ee5 GM |
6401 | /* If new fonts have been loaded that make a glyph matrix adjustment |
6402 | necessary, do it. */ | |
6403 | if (fonts_changed_p) | |
6404 | { | |
6405 | adjust_glyphs (NULL); | |
6406 | ++windows_or_buffers_changed; | |
6407 | fonts_changed_p = 0; | |
6408 | } | |
6409 | ||
fd8ff63d | 6410 | if (! FRAME_WINDOW_P (selected_frame) |
20de20dc RS |
6411 | && previous_terminal_frame != selected_frame) |
6412 | { | |
5f5c8ee5 GM |
6413 | /* Since frames on an ASCII terminal share the same display |
6414 | area, displaying a different frame means redisplay the whole | |
6415 | thing. */ | |
20de20dc RS |
6416 | windows_or_buffers_changed++; |
6417 | SET_FRAME_GARBAGED (selected_frame); | |
6418 | XSETFRAME (Vterminal_frame, selected_frame); | |
6419 | } | |
6420 | previous_terminal_frame = selected_frame; | |
20de20dc | 6421 | |
5f5c8ee5 GM |
6422 | /* Set the visible flags for all frames. Do this before checking |
6423 | for resized or garbaged frames; they want to know if their frames | |
6424 | are visible. See the comment in frame.h for | |
6425 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 6426 | { |
35f56f96 | 6427 | Lisp_Object tail, frame; |
d724d989 | 6428 | |
89819bdd RS |
6429 | number_of_visible_frames = 0; |
6430 | ||
35f56f96 | 6431 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 6432 | { |
5f5c8ee5 GM |
6433 | struct frame *f = XFRAME (frame); |
6434 | ||
6435 | FRAME_SAMPLE_VISIBILITY (f); | |
6436 | if (FRAME_VISIBLE_P (f)) | |
6437 | ++number_of_visible_frames; | |
6438 | clear_desired_matrices (f); | |
f82aff7c | 6439 | } |
d724d989 JB |
6440 | } |
6441 | ||
44fa5b1e | 6442 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
6443 | do_pending_window_change (); |
6444 | ||
5f5c8ee5 | 6445 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 6446 | if (frame_garbaged) |
a2889657 | 6447 | { |
5f5c8ee5 GM |
6448 | /* Old redisplay called redraw_garbaged_frames here which in |
6449 | turn called redraw_frame which in turn called clear_frame. | |
6450 | The call to clear_frame is a source of flickering. After | |
6451 | checking the places where SET_FRAME_GARBAGED is called, I | |
6452 | believe a clear_frame is not necessary. It should suffice in | |
6453 | the new redisplay to invalidate all current matrices, and | |
6454 | ensure a complete redisplay of all windows. */ | |
6455 | Lisp_Object tail, frame; | |
6456 | ||
6457 | FOR_EACH_FRAME (tail, frame) | |
6458 | { | |
6459 | struct frame *f = XFRAME (frame); | |
6460 | ||
6461 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
6462 | { | |
6463 | clear_current_matrices (f); | |
6464 | f->garbaged = 0; | |
6465 | } | |
6466 | } | |
6467 | ||
44fa5b1e | 6468 | frame_garbaged = 0; |
5f5c8ee5 | 6469 | ++windows_or_buffers_changed; |
a2889657 JB |
6470 | } |
6471 | ||
5f5c8ee5 | 6472 | /* Build menubar and toolbar items. */ |
f82aff7c RS |
6473 | prepare_menu_bars (); |
6474 | ||
28995e67 | 6475 | if (windows_or_buffers_changed) |
a2889657 JB |
6476 | update_mode_lines++; |
6477 | ||
538f13d4 RS |
6478 | /* Detect case that we need to write or remove a star in the mode line. */ |
6479 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
6480 | { |
6481 | w->update_mode_line = Qt; | |
6482 | if (buffer_shared > 1) | |
6483 | update_mode_lines++; | |
6484 | } | |
6485 | ||
5f5c8ee5 | 6486 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
6487 | if (!NILP (w->column_number_displayed) |
6488 | /* This alternative quickly identifies a common case | |
6489 | where no change is needed. */ | |
6490 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
6491 | && XFASTINT (w->last_modified) >= MODIFF |
6492 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
6493 | && XFASTINT (w->column_number_displayed) != current_column ()) |
6494 | w->update_mode_line = Qt; | |
6495 | ||
44fa5b1e | 6496 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 6497 | |
5f5c8ee5 GM |
6498 | /* The variable buffer_shared is set in redisplay_window and |
6499 | indicates that we redisplay a buffer in different windows. See | |
6500 | there. */ | |
6501 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
6502 | |
6503 | /* If specs for an arrow have changed, do thorough redisplay | |
6504 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 6505 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 6506 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 6507 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 6508 | |
90adcf20 RS |
6509 | /* Normally the message* functions will have already displayed and |
6510 | updated the echo area, but the frame may have been trashed, or | |
6511 | the update may have been preempted, so display the echo area | |
6512 | again here. */ | |
5f5c8ee5 GM |
6513 | if (echo_area_glyphs |
6514 | || STRINGP (echo_area_message) | |
6515 | || previous_echo_glyphs | |
6516 | || STRINGP (previous_echo_area_message)) | |
90adcf20 | 6517 | { |
5f5c8ee5 | 6518 | echo_area_display (0); |
90adcf20 RS |
6519 | must_finish = 1; |
6520 | } | |
6521 | ||
5f5c8ee5 GM |
6522 | /* If showing the region, and mark has changed, we must redisplay |
6523 | the whole window. The assignment to this_line_start_pos prevents | |
6524 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
6525 | if (((!NILP (Vtransient_mark_mode) |
6526 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6527 | != !NILP (w->region_showing)) | |
82d04750 JB |
6528 | || (!NILP (w->region_showing) |
6529 | && !EQ (w->region_showing, | |
6530 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
6531 | CHARPOS (this_line_start_pos) = 0; |
6532 | ||
6533 | /* Optimize the case that only the line containing the cursor in the | |
6534 | selected window has changed. Variables starting with this_ are | |
6535 | set in display_line and record information about the line | |
6536 | containing the cursor. */ | |
6537 | tlbufpos = this_line_start_pos; | |
6538 | tlendpos = this_line_end_pos; | |
6539 | if (!consider_all_windows_p | |
6540 | && CHARPOS (tlbufpos) > 0 | |
6541 | && NILP (w->update_mode_line) | |
73af359d | 6542 | && !current_buffer->clip_changed |
44fa5b1e | 6543 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 6544 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 6545 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
6546 | && this_line_buffer == current_buffer |
6547 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 6548 | && NILP (w->force_start) |
5f5c8ee5 GM |
6549 | /* Point must be on the line that we have info recorded about. */ |
6550 | && PT >= CHARPOS (tlbufpos) | |
6551 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
6552 | /* All text outside that line, including its final newline, |
6553 | must be unchanged */ | |
5f5c8ee5 GM |
6554 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
6555 | CHARPOS (tlendpos))) | |
6556 | { | |
6557 | if (CHARPOS (tlbufpos) > BEGV | |
6558 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
6559 | && (CHARPOS (tlbufpos) == ZV | |
6560 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
6561 | /* Former continuation line has disappeared by becoming empty */ |
6562 | goto cancel; | |
6563 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 6564 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
6565 | || MINI_WINDOW_P (w)) |
6566 | { | |
1c9241f5 KH |
6567 | /* We have to handle the case of continuation around a |
6568 | wide-column character (See the comment in indent.c around | |
6569 | line 885). | |
6570 | ||
6571 | For instance, in the following case: | |
6572 | ||
6573 | -------- Insert -------- | |
6574 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
6575 | J_I_ ==> J_I_ `^^' are cursors. | |
6576 | ^^ ^^ | |
6577 | -------- -------- | |
6578 | ||
6579 | As we have to redraw the line above, we should goto cancel. */ | |
6580 | ||
5f5c8ee5 GM |
6581 | struct it it; |
6582 | int line_height_before = this_line_pixel_height; | |
6583 | ||
6584 | /* Note that start_display will handle the case that the | |
6585 | line starting at tlbufpos is a continuation lines. */ | |
6586 | start_display (&it, w, tlbufpos); | |
6587 | ||
6588 | /* Implementation note: It this still necessary? */ | |
6589 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
6590 | goto cancel; |
6591 | ||
5f5c8ee5 GM |
6592 | TRACE ((stderr, "trying display optimization 1\n")); |
6593 | w->cursor.vpos = -1; | |
a2889657 | 6594 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
6595 | it.vpos = this_line_vpos; |
6596 | it.current_y = this_line_y; | |
6597 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
6598 | display_line (&it); | |
6599 | ||
a2889657 | 6600 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
6601 | and ends at same distance from eob as before, we win */ |
6602 | if (w->cursor.vpos >= 0 | |
6603 | /* Line is not continued, otherwise this_line_start_pos | |
6604 | would have been set to 0 in display_line. */ | |
6605 | && CHARPOS (this_line_start_pos) | |
6606 | /* Line ends as before. */ | |
6607 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
6608 | /* Line has same height as before. Otherwise other lines | |
6609 | would have to be shifted up or down. */ | |
6610 | && this_line_pixel_height == line_height_before) | |
a2889657 | 6611 | { |
5f5c8ee5 GM |
6612 | /* If this is not the window's last line, we must adjust |
6613 | the charstarts of the lines below. */ | |
6614 | if (it.current_y < it.last_visible_y) | |
6615 | { | |
6616 | struct glyph_row *row | |
6617 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
6618 | int delta, delta_bytes; | |
6619 | ||
6620 | if (Z - CHARPOS (tlendpos) == ZV) | |
6621 | { | |
6622 | /* This line ends at end of (accessible part of) | |
6623 | buffer. There is no newline to count. */ | |
6624 | delta = (Z | |
6625 | - CHARPOS (tlendpos) | |
6626 | - MATRIX_ROW_START_CHARPOS (row)); | |
6627 | delta_bytes = (Z_BYTE | |
6628 | - BYTEPOS (tlendpos) | |
6629 | - MATRIX_ROW_START_BYTEPOS (row)); | |
6630 | } | |
6631 | else | |
6632 | { | |
6633 | /* This line ends in a newline. Must take | |
6634 | account of the newline and the rest of the | |
6635 | text that follows. */ | |
6636 | delta = (Z | |
6637 | - CHARPOS (tlendpos) | |
6638 | - MATRIX_ROW_START_CHARPOS (row)); | |
6639 | delta_bytes = (Z_BYTE | |
6640 | - BYTEPOS (tlendpos) | |
6641 | - MATRIX_ROW_START_BYTEPOS (row)); | |
6642 | } | |
6643 | ||
6644 | increment_glyph_matrix_buffer_positions (w->current_matrix, | |
6645 | this_line_vpos + 1, | |
6646 | w->current_matrix->nrows, | |
6647 | delta, delta_bytes); | |
85bcef6c | 6648 | } |
46db8486 | 6649 | |
5f5c8ee5 GM |
6650 | /* If this row displays text now but previously didn't, |
6651 | or vice versa, w->window_end_vpos may have to be | |
6652 | adjusted. */ | |
6653 | if ((it.glyph_row - 1)->displays_text_p) | |
6654 | { | |
6655 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
6656 | XSETINT (w->window_end_vpos, this_line_vpos); | |
6657 | } | |
6658 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
6659 | && this_line_vpos > 0) | |
6660 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
6661 | w->window_end_valid = Qnil; | |
6662 | ||
6663 | /* Update hint: No need to try to scroll in update_window. */ | |
6664 | w->desired_matrix->no_scrolling_p = 1; | |
6665 | ||
6666 | #if GLYPH_DEBUG | |
6667 | *w->desired_matrix->method = 0; | |
6668 | debug_method_add (w, "optimization 1"); | |
6669 | #endif | |
a2889657 JB |
6670 | goto update; |
6671 | } | |
6672 | else | |
6673 | goto cancel; | |
6674 | } | |
5f5c8ee5 GM |
6675 | else if (/* Cursor position hasn't changed. */ |
6676 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
6677 | /* Make sure the cursor was last displayed |
6678 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
6679 | && 0 <= w->cursor.vpos |
6680 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
6681 | { |
6682 | if (!must_finish) | |
6683 | { | |
6684 | do_pending_window_change (); | |
5f5c8ee5 GM |
6685 | |
6686 | /* We used to always goto end_of_redisplay here, but this | |
6687 | isn't enough if we have a blinking cursor. */ | |
6688 | if (w->cursor_off_p == w->last_cursor_off_p) | |
6689 | goto end_of_redisplay; | |
a2889657 JB |
6690 | } |
6691 | goto update; | |
6692 | } | |
8b51f1e3 KH |
6693 | /* If highlighting the region, or if the cursor is in the echo area, |
6694 | then we can't just move the cursor. */ | |
bd66d1ba RS |
6695 | else if (! (!NILP (Vtransient_mark_mode) |
6696 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
6697 | && (w == XWINDOW (current_buffer->last_selected_window) |
6698 | || highlight_nonselected_windows) | |
8b51f1e3 KH |
6699 | && NILP (w->region_showing) |
6700 | && !cursor_in_echo_area) | |
a2889657 | 6701 | { |
5f5c8ee5 GM |
6702 | struct it it; |
6703 | struct glyph_row *row; | |
6704 | ||
6705 | /* Skip from tlbufpos to PT and see where it is. Note that | |
6706 | PT may be in invisible text. If so, we will end at the | |
6707 | next visible position. */ | |
6708 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
6709 | NULL, DEFAULT_FACE_ID); | |
6710 | it.current_x = this_line_start_x; | |
6711 | it.current_y = this_line_y; | |
6712 | it.vpos = this_line_vpos; | |
6713 | ||
6714 | /* The call to move_it_to stops in front of PT, but | |
6715 | moves over before-strings. */ | |
6716 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
6717 | ||
6718 | if (it.vpos == this_line_vpos | |
6719 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
6720 | row->enabled_p)) | |
a2889657 | 6721 | { |
5f5c8ee5 GM |
6722 | xassert (this_line_vpos == it.vpos); |
6723 | xassert (this_line_y == it.current_y); | |
6724 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
6725 | goto update; |
6726 | } | |
6727 | else | |
6728 | goto cancel; | |
6729 | } | |
5f5c8ee5 | 6730 | |
a2889657 | 6731 | cancel: |
5f5c8ee5 GM |
6732 | /* Text changed drastically or point moved off of line. */ |
6733 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
6734 | } |
6735 | ||
5f5c8ee5 GM |
6736 | CHARPOS (this_line_start_pos) = 0; |
6737 | consider_all_windows_p |= buffer_shared > 1; | |
6738 | ++clear_face_cache_count; | |
a2889657 | 6739 | |
5f5c8ee5 GM |
6740 | |
6741 | /* Build desired matrices. If consider_all_windows_p is non-zero, | |
6742 | do it for all windows on all frames. Otherwise do it for | |
6743 | selected_window, only. */ | |
463f6b91 | 6744 | |
5f5c8ee5 | 6745 | if (consider_all_windows_p) |
a2889657 | 6746 | { |
35f56f96 | 6747 | Lisp_Object tail, frame; |
a2889657 | 6748 | |
5f5c8ee5 GM |
6749 | /* Clear the face cache eventually. */ |
6750 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 6751 | { |
5f5c8ee5 | 6752 | clear_face_cache (0); |
463f6b91 RS |
6753 | clear_face_cache_count = 0; |
6754 | } | |
31b24551 | 6755 | |
5f5c8ee5 GM |
6756 | /* Recompute # windows showing selected buffer. This will be |
6757 | incremented each time such a window is displayed. */ | |
a2889657 JB |
6758 | buffer_shared = 0; |
6759 | ||
35f56f96 | 6760 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 6761 | { |
5f5c8ee5 | 6762 | struct frame *f = XFRAME (frame); |
fd8ff63d | 6763 | if (FRAME_WINDOW_P (f) || f == selected_frame) |
9769686d | 6764 | { |
5f5c8ee5 GM |
6765 | /* Mark all the scroll bars to be removed; we'll redeem |
6766 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
6767 | if (condemn_scroll_bars_hook) |
6768 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 6769 | |
f21ef775 | 6770 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 6771 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 6772 | |
5f5c8ee5 GM |
6773 | /* Any scroll bars which redisplay_windows should have |
6774 | nuked should now go away. */ | |
9769686d RS |
6775 | if (judge_scroll_bars_hook) |
6776 | (*judge_scroll_bars_hook) (f); | |
6777 | } | |
30c566e4 | 6778 | } |
a2889657 | 6779 | } |
5f5c8ee5 GM |
6780 | else if (FRAME_VISIBLE_P (selected_frame) |
6781 | && !FRAME_OBSCURED_P (selected_frame)) | |
6782 | redisplay_window (selected_window, 1); | |
6783 | ||
6784 | ||
6785 | /* Compare desired and current matrices, perform output. */ | |
6786 | ||
6787 | update: | |
6788 | ||
6789 | /* If fonts changed, display again. */ | |
6790 | if (fonts_changed_p) | |
6791 | goto retry; | |
a2889657 | 6792 | |
a2889657 JB |
6793 | /* Prevent various kinds of signals during display update. |
6794 | stdio is not robust about handling signals, | |
6795 | which can cause an apparent I/O error. */ | |
6796 | if (interrupt_input) | |
6797 | unrequest_sigio (); | |
6798 | stop_polling (); | |
6799 | ||
5f5c8ee5 | 6800 | if (consider_all_windows_p) |
a2889657 JB |
6801 | { |
6802 | Lisp_Object tail; | |
6803 | ||
6804 | pause = 0; | |
6805 | ||
44fa5b1e | 6806 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 6807 | { |
5f5c8ee5 | 6808 | struct frame *f; |
a2889657 | 6809 | |
e24c997d | 6810 | if (!FRAMEP (XCONS (tail)->car)) |
a2889657 JB |
6811 | continue; |
6812 | ||
44fa5b1e | 6813 | f = XFRAME (XCONS (tail)->car); |
1af9f229 | 6814 | |
fd8ff63d | 6815 | if ((FRAME_WINDOW_P (f) || f == selected_frame) |
f21ef775 | 6816 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 6817 | { |
5f5c8ee5 GM |
6818 | /* Mark all windows as to be updated. */ |
6819 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
44fa5b1e | 6820 | pause |= update_frame (f, 0, 0); |
a2889657 | 6821 | if (!pause) |
efc63ef0 | 6822 | { |
5f5c8ee5 GM |
6823 | if (hscroll_windows (f->root_window)) |
6824 | goto retry; | |
6825 | ||
efc63ef0 RS |
6826 | mark_window_display_accurate (f->root_window, 1); |
6827 | if (frame_up_to_date_hook != 0) | |
6828 | (*frame_up_to_date_hook) (f); | |
6829 | } | |
a2889657 JB |
6830 | } |
6831 | } | |
6832 | } | |
6833 | else | |
6e8290aa | 6834 | { |
5f5c8ee5 GM |
6835 | if (FRAME_VISIBLE_P (selected_frame) |
6836 | && !FRAME_OBSCURED_P (selected_frame)) | |
6837 | { | |
6838 | XWINDOW (selected_window)->must_be_updated_p = 1; | |
6839 | pause = update_frame (selected_frame, 0, 0); | |
6840 | if (!pause && hscroll_windows (selected_window)) | |
6841 | goto retry; | |
6842 | } | |
4d641a15 KH |
6843 | else |
6844 | pause = 0; | |
d724d989 | 6845 | |
8de2d90b | 6846 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
6847 | function. If the echo area is on another frame, that may |
6848 | have put text on a frame other than the selected one, so the | |
6849 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
6850 | it here. */ |
6851 | { | |
84faf44c | 6852 | Lisp_Object mini_window; |
5f5c8ee5 | 6853 | struct frame *mini_frame; |
84faf44c RS |
6854 | |
6855 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
6856 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 6857 | |
fd8ff63d | 6858 | if (mini_frame != selected_frame && FRAME_WINDOW_P (mini_frame)) |
5f5c8ee5 GM |
6859 | { |
6860 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
6861 | pause |= update_frame (mini_frame, 0, 0); | |
6862 | if (!pause && hscroll_windows (mini_window)) | |
6863 | goto retry; | |
6864 | } | |
8de2d90b | 6865 | } |
6e8290aa | 6866 | } |
a2889657 | 6867 | |
5f5c8ee5 GM |
6868 | /* If display was paused because of pending input, make sure we do a |
6869 | thorough update the next time. */ | |
a2889657 JB |
6870 | if (pause) |
6871 | { | |
5f5c8ee5 GM |
6872 | /* Prevent the optimization at the beginning of |
6873 | redisplay_internal that tries a single-line update of the | |
6874 | line containing the cursor in the selected window. */ | |
6875 | CHARPOS (this_line_start_pos) = 0; | |
6876 | ||
6877 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 6878 | if (!NILP (last_arrow_position)) |
a2889657 JB |
6879 | { |
6880 | last_arrow_position = Qt; | |
6881 | last_arrow_string = Qt; | |
6882 | } | |
5f5c8ee5 GM |
6883 | |
6884 | /* If we pause after scrolling, some rows in the current | |
6885 | matrices of some windows are not valid. */ | |
6886 | if (!WINDOW_FULL_WIDTH_P (w) | |
6887 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
6888 | update_mode_lines = 1; |
6889 | } | |
6890 | ||
5f5c8ee5 GM |
6891 | /* Now text on frame agrees with windows, so put info into the |
6892 | windows for partial redisplay to follow. */ | |
a2889657 JB |
6893 | if (!pause) |
6894 | { | |
6895 | register struct buffer *b = XBUFFER (w->buffer); | |
6896 | ||
a2889657 | 6897 | unchanged_modified = BUF_MODIFF (b); |
8850a573 | 6898 | overlay_unchanged_modified = BUF_OVERLAY_MODIFF (b); |
a2889657 JB |
6899 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); |
6900 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
6901 | ||
5f5c8ee5 | 6902 | if (consider_all_windows_p) |
11e82b76 | 6903 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
6904 | else |
6905 | { | |
5f5c8ee5 GM |
6906 | XSETFASTINT (w->last_point, BUF_PT (b)); |
6907 | w->last_cursor = w->cursor; | |
6908 | w->last_cursor_off_p = w->cursor_off_p; | |
6909 | ||
28995e67 | 6910 | b->clip_changed = 0; |
a2889657 | 6911 | w->update_mode_line = Qnil; |
c2213350 | 6912 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 6913 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
6914 | w->last_had_star |
6915 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6916 | ? Qt : Qnil); | |
3ee4159a RS |
6917 | |
6918 | /* Record if we are showing a region, so can make sure to | |
6919 | update it fully at next redisplay. */ | |
6920 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
6921 | && (w == XWINDOW (current_buffer->last_selected_window) |
6922 | || highlight_nonselected_windows) | |
3ee4159a RS |
6923 | && !NILP (XBUFFER (w->buffer)->mark_active) |
6924 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
6925 | : Qnil); | |
6926 | ||
d2f84654 | 6927 | w->window_end_valid = w->buffer; |
d45de95b | 6928 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 6929 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 RS |
6930 | if (frame_up_to_date_hook != 0) |
6931 | (*frame_up_to_date_hook) (selected_frame); | |
a2889657 | 6932 | } |
5f5c8ee5 | 6933 | |
a2889657 JB |
6934 | update_mode_lines = 0; |
6935 | windows_or_buffers_changed = 0; | |
6936 | } | |
6937 | ||
5f5c8ee5 GM |
6938 | /* Start SIGIO interrupts coming again. Having them off during the |
6939 | code above makes it less likely one will discard output, but not | |
6940 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 6941 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
6942 | if (interrupt_input) |
6943 | request_sigio (); | |
6944 | start_polling (); | |
6945 | ||
5f5c8ee5 GM |
6946 | /* If a frame has become visible which was not before, redisplay |
6947 | again, so that we display it. Expose events for such a frame | |
6948 | (which it gets when becoming visible) don't call the parts of | |
6949 | redisplay constructing glyphs, so simply exposing a frame won't | |
6950 | display anything in this case. So, we have to display these | |
6951 | frames here explicitly. */ | |
11c52c4f RS |
6952 | if (!pause) |
6953 | { | |
6954 | Lisp_Object tail, frame; | |
6955 | int new_count = 0; | |
6956 | ||
6957 | FOR_EACH_FRAME (tail, frame) | |
6958 | { | |
6959 | int this_is_visible = 0; | |
8e83f802 RS |
6960 | |
6961 | if (XFRAME (frame)->visible) | |
6962 | this_is_visible = 1; | |
6963 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
6964 | if (XFRAME (frame)->visible) | |
6965 | this_is_visible = 1; | |
11c52c4f RS |
6966 | |
6967 | if (this_is_visible) | |
6968 | new_count++; | |
6969 | } | |
6970 | ||
89819bdd | 6971 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
6972 | windows_or_buffers_changed++; |
6973 | } | |
6974 | ||
44fa5b1e | 6975 | /* Change frame size now if a change is pending. */ |
a2889657 | 6976 | do_pending_window_change (); |
d8e242fd | 6977 | |
8b32d885 RS |
6978 | /* If we just did a pending size change, or have additional |
6979 | visible frames, redisplay again. */ | |
3c8c72e0 | 6980 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 6981 | goto retry; |
5f5c8ee5 GM |
6982 | |
6983 | end_of_redisplay:; | |
6984 | ||
6985 | if (--redisplaying_p < 0) | |
6986 | redisplaying_p = 0; | |
a2889657 JB |
6987 | } |
6988 | ||
5f5c8ee5 GM |
6989 | |
6990 | /* Redisplay, but leave alone any recent echo area message unless | |
6991 | another message has been requested in its place. | |
a2889657 JB |
6992 | |
6993 | This is useful in situations where you need to redisplay but no | |
6994 | user action has occurred, making it inappropriate for the message | |
6995 | area to be cleared. See tracking_off and | |
6996 | wait_reading_process_input for examples of these situations. */ | |
6997 | ||
8991bb31 | 6998 | void |
a2889657 JB |
6999 | redisplay_preserve_echo_area () |
7000 | { | |
5f5c8ee5 GM |
7001 | if (!echo_area_glyphs |
7002 | && !STRINGP (echo_area_message) | |
7003 | && (previous_echo_glyphs | |
7004 | || STRINGP (previous_echo_area_message))) | |
a2889657 JB |
7005 | { |
7006 | echo_area_glyphs = previous_echo_glyphs; | |
5f5c8ee5 GM |
7007 | echo_area_message = previous_echo_area_message; |
7008 | echo_area_glyphs_length = previous_echo_glyphs_length; | |
e9874cee | 7009 | redisplay_internal (1); |
5f5c8ee5 GM |
7010 | echo_area_glyphs = NULL; |
7011 | echo_area_message = Qnil; | |
a2889657 JB |
7012 | } |
7013 | else | |
e9874cee | 7014 | redisplay_internal (1); |
a2889657 JB |
7015 | } |
7016 | ||
5f5c8ee5 GM |
7017 | |
7018 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
7019 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
7020 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
7021 | the next time redisplay_internal is called. */ | |
7022 | ||
a2889657 | 7023 | void |
5f5c8ee5 | 7024 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 7025 | Lisp_Object window; |
5f5c8ee5 | 7026 | int accurate_p; |
a2889657 | 7027 | { |
5f5c8ee5 GM |
7028 | struct window *w; |
7029 | ||
7030 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
7031 | { |
7032 | w = XWINDOW (window); | |
7033 | ||
5f5c8ee5 | 7034 | if (BUFFERP (w->buffer)) |
bd66d1ba | 7035 | { |
5f5c8ee5 GM |
7036 | struct buffer *b = XBUFFER (w->buffer); |
7037 | ||
c2213350 | 7038 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 7039 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 7040 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
7041 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
7042 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
7043 | ? Qt : Qnil); | |
bd66d1ba | 7044 | |
5f5c8ee5 GM |
7045 | #if 0 /* I don't think this is necessary because display_line does it. |
7046 | Let's check it. */ | |
bd66d1ba RS |
7047 | /* Record if we are showing a region, so can make sure to |
7048 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
7049 | w->region_showing |
7050 | = (!NILP (Vtransient_mark_mode) | |
7051 | && (w == XWINDOW (current_buffer->last_selected_window) | |
7052 | || highlight_nonselected_windows) | |
7053 | && (!NILP (b->mark_active) | |
7054 | ? Fmarker_position (b->mark) | |
7055 | : Qnil)); | |
7056 | #endif | |
7057 | ||
7058 | if (accurate_p) | |
7059 | { | |
7060 | b->clip_changed = 0; | |
7061 | w->last_cursor = w->cursor; | |
7062 | w->last_cursor_off_p = w->cursor_off_p; | |
7063 | if (w == XWINDOW (selected_window)) | |
7064 | w->last_point = BUF_PT (b); | |
7065 | else | |
7066 | w->last_point = XMARKER (w->pointm)->charpos; | |
7067 | } | |
bd66d1ba RS |
7068 | } |
7069 | ||
d2f84654 | 7070 | w->window_end_valid = w->buffer; |
a2889657 JB |
7071 | w->update_mode_line = Qnil; |
7072 | ||
265a9e55 | 7073 | if (!NILP (w->vchild)) |
5f5c8ee5 | 7074 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 7075 | if (!NILP (w->hchild)) |
5f5c8ee5 | 7076 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
7077 | } |
7078 | ||
5f5c8ee5 | 7079 | if (accurate_p) |
a2889657 | 7080 | { |
d45de95b | 7081 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
7082 | last_arrow_string = Voverlay_arrow_string; |
7083 | } | |
7084 | else | |
7085 | { | |
5f5c8ee5 GM |
7086 | /* Force a thorough redisplay the next time by setting |
7087 | last_arrow_position and last_arrow_string to t, which is | |
7088 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
7089 | last_arrow_position = Qt; |
7090 | last_arrow_string = Qt; | |
7091 | } | |
7092 | } | |
5f5c8ee5 GM |
7093 | |
7094 | ||
7095 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
7096 | C. Since a display table doesn't have any parent, we don't have to | |
7097 | follow parent. Do not call this function directly but use the | |
7098 | macro DISP_CHAR_VECTOR. */ | |
7099 | ||
7100 | Lisp_Object | |
7101 | disp_char_vector (dp, c) | |
7102 | struct Lisp_Char_Table *dp; | |
7103 | int c; | |
7104 | { | |
7105 | int code[4], i; | |
7106 | Lisp_Object val; | |
7107 | ||
7108 | if (SINGLE_BYTE_CHAR_P (c)) | |
7109 | return (dp->contents[c]); | |
7110 | ||
7111 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
7112 | if (code[0] != CHARSET_COMPOSITION) | |
7113 | { | |
7114 | if (code[1] < 32) | |
7115 | code[1] = -1; | |
7116 | else if (code[2] < 32) | |
7117 | code[2] = -1; | |
7118 | } | |
7119 | ||
7120 | /* Here, the possible range of code[0] (== charset ID) is | |
7121 | 128..max_charset. Since the top level char table contains data | |
7122 | for multibyte characters after 256th element, we must increment | |
7123 | code[0] by 128 to get a correct index. */ | |
7124 | code[0] += 128; | |
7125 | code[3] = -1; /* anchor */ | |
7126 | ||
7127 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
7128 | { | |
7129 | val = dp->contents[code[i]]; | |
7130 | if (!SUB_CHAR_TABLE_P (val)) | |
7131 | return (NILP (val) ? dp->defalt : val); | |
7132 | } | |
7133 | ||
7134 | /* Here, val is a sub char table. We return the default value of | |
7135 | it. */ | |
7136 | return (dp->defalt); | |
7137 | } | |
7138 | ||
7139 | ||
a2889657 | 7140 | \f |
5f5c8ee5 GM |
7141 | /*********************************************************************** |
7142 | Window Redisplay | |
7143 | ***********************************************************************/ | |
a2725ab2 | 7144 | |
5f5c8ee5 | 7145 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
7146 | |
7147 | static void | |
5f5c8ee5 GM |
7148 | redisplay_windows (window) |
7149 | Lisp_Object window; | |
90adcf20 | 7150 | { |
5f5c8ee5 GM |
7151 | while (!NILP (window)) |
7152 | { | |
7153 | struct window *w = XWINDOW (window); | |
7154 | ||
7155 | if (!NILP (w->hchild)) | |
7156 | redisplay_windows (w->hchild); | |
7157 | else if (!NILP (w->vchild)) | |
7158 | redisplay_windows (w->vchild); | |
7159 | else | |
7160 | redisplay_window (window, 0); | |
a2725ab2 | 7161 | |
5f5c8ee5 GM |
7162 | window = w->next; |
7163 | } | |
7164 | } | |
7165 | ||
7166 | ||
7167 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
7168 | DELTA is the number of bytes by which positions recorded in ROW | |
7169 | differ from current buffer positions. */ | |
7170 | ||
7171 | void | |
7172 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
7173 | struct window *w; | |
7174 | struct glyph_row *row; | |
7175 | struct glyph_matrix *matrix; | |
7176 | int delta, delta_bytes, dy, dvpos; | |
7177 | { | |
7178 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
7179 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
7180 | int x = row->x; | |
7181 | int pt_old = PT - delta; | |
7182 | ||
7183 | /* Skip over glyphs not having an object at the start of the row. | |
7184 | These are special glyphs like truncation marks on terminal | |
7185 | frames. */ | |
7186 | if (row->displays_text_p) | |
7187 | while (glyph < end | |
7188 | && !glyph->object | |
7189 | && glyph->charpos < 0) | |
7190 | { | |
7191 | x += glyph->pixel_width; | |
7192 | ++glyph; | |
7193 | } | |
7194 | ||
7195 | while (glyph < end | |
7196 | && glyph->object | |
7197 | && (!BUFFERP (glyph->object) | |
7198 | || glyph->charpos < pt_old)) | |
7199 | { | |
7200 | x += glyph->pixel_width; | |
7201 | ++glyph; | |
7202 | } | |
7203 | ||
7204 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
7205 | w->cursor.x = x; | |
7206 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
7207 | w->cursor.y = row->y + dy; | |
7208 | ||
7209 | if (w == XWINDOW (selected_window)) | |
7210 | { | |
7211 | if (!row->continued_p | |
7212 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
7213 | && row->x == 0) | |
7214 | { | |
7215 | this_line_buffer = XBUFFER (w->buffer); | |
7216 | ||
7217 | CHARPOS (this_line_start_pos) | |
7218 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
7219 | BYTEPOS (this_line_start_pos) | |
7220 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
7221 | ||
7222 | CHARPOS (this_line_end_pos) | |
7223 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
7224 | BYTEPOS (this_line_end_pos) | |
7225 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
7226 | ||
7227 | this_line_y = w->cursor.y; | |
7228 | this_line_pixel_height = row->height; | |
7229 | this_line_vpos = w->cursor.vpos; | |
7230 | this_line_start_x = row->x; | |
7231 | } | |
7232 | else | |
7233 | CHARPOS (this_line_start_pos) = 0; | |
7234 | } | |
7235 | } | |
7236 | ||
7237 | ||
7238 | /* Run window scroll functions, if any, for WINDOW with new window | |
7239 | start STARTP. Sets the window start of WINDOW to that position. */ | |
7240 | ||
7241 | static INLINE struct text_pos | |
7242 | run_window_scroll_functions (window, startp) | |
7243 | Lisp_Object window; | |
7244 | struct text_pos startp; | |
7245 | { | |
7246 | struct window *w = XWINDOW (window); | |
7247 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
90adcf20 | 7248 | |
5f5c8ee5 GM |
7249 | if (!NILP (Vwindow_scroll_functions)) |
7250 | { | |
7251 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
7252 | make_number (CHARPOS (startp))); | |
7253 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
7254 | } | |
90adcf20 | 7255 | |
5f5c8ee5 GM |
7256 | return startp; |
7257 | } | |
7258 | ||
7259 | ||
7260 | /* Modify the desired matrix of window W and W->vscroll so that the | |
7261 | line containing the cursor is fully visible. */ | |
7262 | ||
7263 | static void | |
7264 | make_cursor_line_fully_visible (w) | |
7265 | struct window *w; | |
7266 | { | |
7267 | struct glyph_matrix *matrix; | |
7268 | struct glyph_row *row; | |
7269 | int top_line_height; | |
7270 | ||
7271 | /* It's not always possible to find the cursor, e.g, when a window | |
7272 | is full of overlay strings. Don't do anything in that case. */ | |
7273 | if (w->cursor.vpos < 0) | |
7274 | return; | |
7275 | ||
7276 | matrix = w->desired_matrix; | |
7277 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
7278 | ||
7279 | /* If row->y == top y of window display area, the window isn't tall | |
7280 | enough to display a single line. There is nothing we can do | |
7281 | about it. */ | |
7282 | top_line_height = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
7283 | if (row->y == top_line_height) | |
7284 | return; | |
7285 | ||
7286 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
7287 | { | |
7288 | int dy = row->height - row->visible_height; | |
7289 | w->vscroll = 0; | |
7290 | w->cursor.y += dy; | |
7291 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7292 | } | |
7293 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) | |
7294 | { | |
7295 | int dy = - (row->height - row->visible_height); | |
7296 | w->vscroll = dy; | |
7297 | w->cursor.y += dy; | |
7298 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7299 | } | |
7300 | ||
7301 | /* When we change the cursor y-position of the selected window, | |
7302 | change this_line_y as well so that the display optimization for | |
7303 | the cursor line of the selected window in redisplay_internal uses | |
7304 | the correct y-position. */ | |
7305 | if (w == XWINDOW (selected_window)) | |
7306 | this_line_y = w->cursor.y; | |
7307 | } | |
7308 | ||
7309 | ||
7310 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
7311 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
7312 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
7313 | in redisplay_window to bring a partially visible line into view in | |
7314 | the case that only the cursor has moved. | |
7315 | ||
7316 | Value is | |
7317 | ||
7318 | 1 if scrolling succeeded | |
7319 | ||
7320 | 0 if scrolling didn't find point. | |
7321 | ||
7322 | -1 if new fonts have been loaded so that we must interrupt | |
7323 | redisplay, adjust glyph matrices, and try again. */ | |
7324 | ||
7325 | static int | |
7326 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
7327 | scroll_step, temp_scroll_step) | |
7328 | Lisp_Object window; | |
7329 | int just_this_one_p; | |
7330 | int scroll_conservatively, scroll_step; | |
7331 | int temp_scroll_step; | |
7332 | { | |
7333 | struct window *w = XWINDOW (window); | |
7334 | struct frame *f = XFRAME (w->frame); | |
7335 | struct text_pos scroll_margin_pos; | |
7336 | struct text_pos pos; | |
7337 | struct text_pos startp; | |
7338 | struct it it; | |
7339 | Lisp_Object window_end; | |
7340 | int this_scroll_margin; | |
7341 | int dy = 0; | |
7342 | int scroll_max; | |
7343 | int line_height, rc; | |
7344 | int amount_to_scroll = 0; | |
7345 | Lisp_Object aggressive; | |
7346 | int height; | |
7347 | ||
7348 | #if GLYPH_DEBUG | |
7349 | debug_method_add (w, "try_scrolling"); | |
78614721 | 7350 | #endif |
5f5c8ee5 GM |
7351 | |
7352 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
7353 | ||
7354 | /* Compute scroll margin height in pixels. We scroll when point is | |
7355 | within this distance from the top or bottom of the window. */ | |
7356 | if (scroll_margin > 0) | |
90adcf20 | 7357 | { |
5f5c8ee5 GM |
7358 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
7359 | this_scroll_margin *= CANON_Y_UNIT (f); | |
7360 | } | |
7361 | else | |
7362 | this_scroll_margin = 0; | |
7363 | ||
7364 | /* Compute how much we should try to scroll maximally to bring point | |
7365 | into view. */ | |
7366 | if (scroll_step) | |
7367 | scroll_max = scroll_step; | |
7368 | else if (scroll_conservatively) | |
7369 | scroll_max = scroll_conservatively; | |
7370 | else if (temp_scroll_step) | |
7371 | scroll_max = temp_scroll_step; | |
7372 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
7373 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
7374 | /* We're trying to scroll because of aggressive scrolling | |
7375 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
7376 | there should be a variable for this. */ | |
7377 | scroll_max = 10; | |
7378 | else | |
7379 | scroll_max = 0; | |
7380 | scroll_max *= CANON_Y_UNIT (f); | |
7381 | ||
7382 | /* Decide whether we have to scroll down. Start at the window end | |
7383 | and move this_scroll_margin up to find the position of the scroll | |
7384 | margin. */ | |
7385 | window_end = Fwindow_end (window, Qt); | |
7386 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
7387 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
7388 | if (this_scroll_margin) | |
7389 | { | |
7390 | start_display (&it, w, scroll_margin_pos); | |
7391 | move_it_vertically (&it, - this_scroll_margin); | |
7392 | scroll_margin_pos = it.current.pos; | |
7393 | } | |
7394 | ||
7395 | if (PT >= CHARPOS (scroll_margin_pos)) | |
7396 | { | |
7397 | int y0; | |
7398 | ||
7399 | /* Point is in the scroll margin at the bottom of the window, or | |
7400 | below. Compute a new window start that makes point visible. */ | |
7401 | ||
7402 | /* Compute the distance from the scroll margin to PT. | |
7403 | Give up if the distance is greater than scroll_max. */ | |
7404 | start_display (&it, w, scroll_margin_pos); | |
7405 | y0 = it.current_y; | |
7406 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
7407 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
7408 | line_height = (it.max_ascent + it.max_descent | |
7409 | ? it.max_ascent + it.max_descent | |
7410 | : last_height); | |
7411 | dy = it.current_y + line_height - y0; | |
7412 | if (dy > scroll_max) | |
7413 | return 0; | |
7414 | ||
7415 | /* Move the window start down. If scrolling conservatively, | |
7416 | move it just enough down to make point visible. If | |
7417 | scroll_step is set, move it down by scroll_step. */ | |
7418 | start_display (&it, w, startp); | |
7419 | ||
7420 | if (scroll_conservatively) | |
7421 | amount_to_scroll = dy; | |
7422 | else if (scroll_step || temp_scroll_step) | |
7423 | amount_to_scroll = scroll_max; | |
7424 | else | |
90adcf20 | 7425 | { |
5f5c8ee5 GM |
7426 | aggressive = current_buffer->scroll_down_aggressively; |
7427 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
7428 | - WINDOW_DISPLAY_TOP_LINE_HEIGHT (w)); | |
7429 | if (NUMBERP (aggressive)) | |
7430 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
7431 | } | |
a2725ab2 | 7432 | |
5f5c8ee5 GM |
7433 | if (amount_to_scroll <= 0) |
7434 | return 0; | |
a2725ab2 | 7435 | |
5f5c8ee5 GM |
7436 | move_it_vertically (&it, amount_to_scroll); |
7437 | startp = it.current.pos; | |
7438 | } | |
7439 | else | |
7440 | { | |
7441 | /* See if point is inside the scroll margin at the top of the | |
7442 | window. */ | |
7443 | scroll_margin_pos = startp; | |
7444 | if (this_scroll_margin) | |
7445 | { | |
7446 | start_display (&it, w, startp); | |
7447 | move_it_vertically (&it, this_scroll_margin); | |
7448 | scroll_margin_pos = it.current.pos; | |
7449 | } | |
7450 | ||
7451 | if (PT < CHARPOS (scroll_margin_pos)) | |
7452 | { | |
7453 | /* Point is in the scroll margin at the top of the window or | |
7454 | above what is displayed in the window. */ | |
7455 | int y0; | |
7456 | ||
7457 | /* Compute the vertical distance from PT to the scroll | |
7458 | margin position. Give up if distance is greater than | |
7459 | scroll_max. */ | |
7460 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
7461 | start_display (&it, w, pos); | |
7462 | y0 = it.current_y; | |
7463 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
7464 | it.last_visible_y, -1, | |
7465 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
7466 | dy = it.current_y - y0; | |
7467 | if (dy > scroll_max) | |
7468 | return 0; | |
7469 | ||
7470 | /* Compute new window start. */ | |
7471 | start_display (&it, w, startp); | |
7472 | ||
7473 | if (scroll_conservatively) | |
7474 | amount_to_scroll = dy; | |
7475 | else if (scroll_step || temp_scroll_step) | |
7476 | amount_to_scroll = scroll_max; | |
538f13d4 | 7477 | else |
5f5c8ee5 GM |
7478 | { |
7479 | aggressive = current_buffer->scroll_up_aggressively; | |
7480 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
7481 | - WINDOW_DISPLAY_TOP_LINE_HEIGHT (w)); | |
7482 | if (NUMBERP (aggressive)) | |
7483 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
7484 | } | |
a2725ab2 | 7485 | |
5f5c8ee5 GM |
7486 | if (amount_to_scroll <= 0) |
7487 | return 0; | |
7488 | ||
7489 | move_it_vertically (&it, - amount_to_scroll); | |
7490 | startp = it.current.pos; | |
90adcf20 RS |
7491 | } |
7492 | } | |
a2889657 | 7493 | |
5f5c8ee5 GM |
7494 | /* Run window scroll functions. */ |
7495 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 7496 | |
5f5c8ee5 GM |
7497 | /* Display the window. Give up if new fonts are loaded, or if point |
7498 | doesn't appear. */ | |
7499 | if (!try_window (window, startp)) | |
7500 | rc = -1; | |
7501 | else if (w->cursor.vpos < 0) | |
7502 | { | |
7503 | clear_glyph_matrix (w->desired_matrix); | |
7504 | rc = 0; | |
7505 | } | |
7506 | else | |
7507 | { | |
7508 | /* Maybe forget recorded base line for line number display. */ | |
7509 | if (!just_this_one_p | |
7510 | || current_buffer->clip_changed | |
7511 | || beg_unchanged < CHARPOS (startp)) | |
7512 | w->base_line_number = Qnil; | |
7513 | ||
7514 | /* If cursor ends up on a partially visible line, shift display | |
7515 | lines up or down. */ | |
7516 | make_cursor_line_fully_visible (w); | |
7517 | rc = 1; | |
7518 | } | |
7519 | ||
7520 | return rc; | |
a2889657 JB |
7521 | } |
7522 | ||
5f5c8ee5 GM |
7523 | |
7524 | /* Compute a suitable window start for window W if display of W starts | |
7525 | on a continuation line. Value is non-zero if a new window start | |
7526 | was computed. | |
7527 | ||
7528 | The new window start will be computed, based on W's width, starting | |
7529 | from the start of the continued line. It is the start of the | |
7530 | screen line with the minimum distance from the old start W->start. */ | |
7531 | ||
7532 | static int | |
7533 | compute_window_start_on_continuation_line (w) | |
7534 | struct window *w; | |
1f1ff51d | 7535 | { |
5f5c8ee5 GM |
7536 | struct text_pos pos, start_pos; |
7537 | int window_start_changed_p = 0; | |
1f1ff51d | 7538 | |
5f5c8ee5 | 7539 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 7540 | |
5f5c8ee5 GM |
7541 | /* If window start is on a continuation line... Window start may be |
7542 | < BEGV in case there's invisible text at the start of the | |
7543 | buffer (M-x rmail, for example). */ | |
7544 | if (CHARPOS (start_pos) > BEGV | |
7545 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 7546 | { |
5f5c8ee5 GM |
7547 | struct it it; |
7548 | struct glyph_row *row; | |
7549 | ||
7550 | /* Find the start of the continued line. This should be fast | |
7551 | because scan_buffer is fast (newline cache). */ | |
7552 | row = w->desired_matrix->rows + (WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0); | |
7553 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), | |
7554 | row, DEFAULT_FACE_ID); | |
7555 | reseat_at_previous_visible_line_start (&it); | |
7556 | ||
7557 | /* If the line start is "too far" away from the window start, | |
7558 | say it takes too much time to compute a new window start. */ | |
7559 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
7560 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
7561 | { | |
7562 | int min_distance, distance; | |
7563 | ||
7564 | /* Move forward by display lines to find the new window | |
7565 | start. If window width was enlarged, the new start can | |
7566 | be expected to be > the old start. If window width was | |
7567 | decreased, the new window start will be < the old start. | |
7568 | So, we're looking for the display line start with the | |
7569 | minimum distance from the old window start. */ | |
7570 | pos = it.current.pos; | |
7571 | min_distance = INFINITY; | |
7572 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
7573 | distance < min_distance) | |
7574 | { | |
7575 | min_distance = distance; | |
7576 | pos = it.current.pos; | |
7577 | move_it_by_lines (&it, 1, 0); | |
7578 | } | |
7579 | ||
7580 | /* Set the window start there. */ | |
7581 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
7582 | window_start_changed_p = 1; | |
7583 | } | |
1f1ff51d | 7584 | } |
5f5c8ee5 GM |
7585 | |
7586 | return window_start_changed_p; | |
1f1ff51d KH |
7587 | } |
7588 | ||
5f5c8ee5 GM |
7589 | |
7590 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only | |
7591 | selected_window is redisplayed. */ | |
90adcf20 | 7592 | |
a2889657 | 7593 | static void |
5f5c8ee5 | 7594 | redisplay_window (window, just_this_one_p) |
a2889657 | 7595 | Lisp_Object window; |
5f5c8ee5 | 7596 | int just_this_one_p; |
a2889657 | 7597 | { |
5f5c8ee5 GM |
7598 | struct window *w = XWINDOW (window); |
7599 | struct frame *f = XFRAME (w->frame); | |
7600 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 7601 | struct buffer *old = current_buffer; |
5f5c8ee5 | 7602 | struct text_pos lpoint, opoint, startp; |
e481f960 | 7603 | int update_mode_line; |
5f5c8ee5 GM |
7604 | int tem; |
7605 | struct it it; | |
7606 | /* Record it now because it's overwritten. */ | |
7607 | int current_matrix_up_to_date_p = 0; | |
5ba50c51 | 7608 | int really_switched_buffer = 0; |
5f5c8ee5 | 7609 | int temp_scroll_step = 0; |
2e54982e | 7610 | int count = specpdl_ptr - specpdl; |
a2889657 | 7611 | |
5f5c8ee5 GM |
7612 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
7613 | opoint = lpoint; | |
a2889657 | 7614 | |
5f5c8ee5 GM |
7615 | /* W must be a leaf window here. */ |
7616 | xassert (!NILP (w->buffer)); | |
7617 | #if GLYPH_DEBUG | |
7618 | *w->desired_matrix->method = 0; | |
7619 | #endif | |
2e54982e RS |
7620 | |
7621 | specbind (Qinhibit_point_motion_hooks, Qt); | |
5f5c8ee5 GM |
7622 | |
7623 | /* Has the mode line to be updated? */ | |
7624 | update_mode_line = (!NILP (w->update_mode_line) | |
7625 | || update_mode_lines | |
7626 | || buffer->clip_changed); | |
8de2d90b JB |
7627 | |
7628 | if (MINI_WINDOW_P (w)) | |
7629 | { | |
5f5c8ee5 GM |
7630 | if (w == XWINDOW (echo_area_window) |
7631 | && (echo_area_glyphs | |
7632 | || STRINGP (echo_area_message))) | |
7633 | { | |
7634 | if (update_mode_line) | |
7635 | /* We may have to update a tty frame's menu bar or a | |
7636 | toolbar. Example `M-x C-h C-h C-g'. */ | |
7637 | goto finish_menu_bars; | |
7638 | else | |
7639 | /* We've already displayed the echo area glyphs in this window. */ | |
7640 | goto finish_scroll_bars; | |
7641 | } | |
73af359d | 7642 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 7643 | { |
5f5c8ee5 GM |
7644 | /* W is a mini-buffer window, but it's not the currently |
7645 | active one, so clear it. */ | |
7646 | int yb = window_text_bottom_y (w); | |
7647 | struct glyph_row *row; | |
7648 | int y; | |
7649 | ||
7650 | for (y = 0, row = w->desired_matrix->rows; | |
7651 | y < yb; | |
7652 | y += row->height, ++row) | |
7653 | blank_row (w, row, y); | |
88f22aff | 7654 | goto finish_scroll_bars; |
8de2d90b JB |
7655 | } |
7656 | } | |
a2889657 | 7657 | |
5f5c8ee5 GM |
7658 | /* Otherwise set up data on this window; select its buffer and point |
7659 | value. */ | |
e481f960 | 7660 | if (update_mode_line) |
5ba50c51 | 7661 | { |
5f5c8ee5 GM |
7662 | /* Really select the buffer, for the sake of buffer-local |
7663 | variables. */ | |
5ba50c51 RS |
7664 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7665 | really_switched_buffer = 1; | |
7666 | } | |
e481f960 RS |
7667 | else |
7668 | set_buffer_temp (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
7669 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
7670 | ||
7671 | current_matrix_up_to_date_p | |
7672 | = (!NILP (w->window_end_valid) | |
7673 | && !current_buffer->clip_changed | |
7674 | && XFASTINT (w->last_modified) >= MODIFF | |
7675 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 7676 | |
5f5c8ee5 GM |
7677 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
7678 | the window end being valid, so set it to nil there. */ | |
7679 | if (windows_or_buffers_changed) | |
7680 | { | |
7681 | /* If window starts on a continuation line, maybe adjust the | |
7682 | window start in case the window's width changed. */ | |
7683 | if (XMARKER (w->start)->buffer == current_buffer) | |
7684 | compute_window_start_on_continuation_line (w); | |
7685 | ||
7686 | w->window_end_valid = Qnil; | |
7687 | } | |
12adba34 | 7688 | |
5f5c8ee5 GM |
7689 | /* Some sanity checks. */ |
7690 | CHECK_WINDOW_END (w); | |
7691 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 7692 | abort (); |
5f5c8ee5 | 7693 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 7694 | abort (); |
a2889657 | 7695 | |
28995e67 RS |
7696 | /* If %c is in mode line, update it if needed. */ |
7697 | if (!NILP (w->column_number_displayed) | |
7698 | /* This alternative quickly identifies a common case | |
7699 | where no change is needed. */ | |
7700 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7701 | && XFASTINT (w->last_modified) >= MODIFF |
7702 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7703 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7704 | update_mode_line = 1; | |
7705 | ||
5f5c8ee5 GM |
7706 | /* Count number of windows showing the selected buffer. An indirect |
7707 | buffer counts as its base buffer. */ | |
7708 | if (!just_this_one_p) | |
42640f83 RS |
7709 | { |
7710 | struct buffer *current_base, *window_base; | |
7711 | current_base = current_buffer; | |
7712 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
7713 | if (current_base->base_buffer) | |
7714 | current_base = current_base->base_buffer; | |
7715 | if (window_base->base_buffer) | |
7716 | window_base = window_base->base_buffer; | |
7717 | if (current_base == window_base) | |
7718 | buffer_shared++; | |
7719 | } | |
a2889657 | 7720 | |
5f5c8ee5 GM |
7721 | /* Point refers normally to the selected window. For any other |
7722 | window, set up appropriate value. */ | |
a2889657 JB |
7723 | if (!EQ (window, selected_window)) |
7724 | { | |
12adba34 RS |
7725 | int new_pt = XMARKER (w->pointm)->charpos; |
7726 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 7727 | if (new_pt < BEGV) |
a2889657 | 7728 | { |
f67a0f51 | 7729 | new_pt = BEGV; |
12adba34 RS |
7730 | new_pt_byte = BEGV_BYTE; |
7731 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 7732 | } |
f67a0f51 | 7733 | else if (new_pt > (ZV - 1)) |
a2889657 | 7734 | { |
f67a0f51 | 7735 | new_pt = ZV; |
12adba34 RS |
7736 | new_pt_byte = ZV_BYTE; |
7737 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 7738 | } |
5f5c8ee5 | 7739 | |
f67a0f51 | 7740 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 7741 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
7742 | } |
7743 | ||
f4faa47c | 7744 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
7745 | have changed, invalidate the width run cache. It's true that |
7746 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
7747 | redisplay goes (non-fatally) haywire when the display table is |
7748 | changed, so why should we worry about doing any better? */ | |
7749 | if (current_buffer->width_run_cache) | |
7750 | { | |
f908610f | 7751 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
7752 | |
7753 | if (! disptab_matches_widthtab (disptab, | |
7754 | XVECTOR (current_buffer->width_table))) | |
7755 | { | |
7756 | invalidate_region_cache (current_buffer, | |
7757 | current_buffer->width_run_cache, | |
7758 | BEG, Z); | |
7759 | recompute_width_table (current_buffer, disptab); | |
7760 | } | |
7761 | } | |
7762 | ||
a2889657 | 7763 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
7764 | if (XMARKER (w->start)->buffer != current_buffer) |
7765 | goto recenter; | |
7766 | ||
5f5c8ee5 | 7767 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 7768 | |
cf0df6ab RS |
7769 | /* If someone specified a new starting point but did not insist, |
7770 | check whether it can be used. */ | |
5f5c8ee5 | 7771 | if (!NILP (w->optional_new_start)) |
cf0df6ab RS |
7772 | { |
7773 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
7774 | /* This takes a mini-buffer prompt into account. */ |
7775 | start_display (&it, w, startp); | |
7776 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
7777 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
7778 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
7779 | w->force_start = Qt; |
7780 | } | |
7781 | ||
8de2d90b | 7782 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 7783 | unless the specified location is outside the accessible range. */ |
265a9e55 | 7784 | if (!NILP (w->force_start)) |
a2889657 | 7785 | { |
e63574d7 | 7786 | w->force_start = Qnil; |
5f5c8ee5 | 7787 | w->vscroll = 0; |
b5174a51 | 7788 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
7789 | |
7790 | /* Forget any recorded base line for line number display. */ | |
7791 | if (!current_matrix_up_to_date_p | |
7792 | || current_buffer->clip_changed) | |
7793 | w->base_line_number = Qnil; | |
7794 | ||
75c43375 RS |
7795 | /* Redisplay the mode line. Select the buffer properly for that. |
7796 | Also, run the hook window-scroll-functions | |
7797 | because we have scrolled. */ | |
e63574d7 RS |
7798 | /* Note, we do this after clearing force_start because |
7799 | if there's an error, it is better to forget about force_start | |
7800 | than to get into an infinite loop calling the hook functions | |
7801 | and having them get more errors. */ | |
75c43375 RS |
7802 | if (!update_mode_line |
7803 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 7804 | { |
5ba50c51 RS |
7805 | if (!really_switched_buffer) |
7806 | { | |
7807 | set_buffer_temp (old); | |
7808 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 7809 | really_switched_buffer = 1; |
5ba50c51 | 7810 | } |
5f5c8ee5 | 7811 | |
e481f960 RS |
7812 | update_mode_line = 1; |
7813 | w->update_mode_line = Qt; | |
5f5c8ee5 | 7814 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 7815 | } |
5f5c8ee5 | 7816 | |
c2213350 | 7817 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 7818 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
7819 | if (CHARPOS (startp) < BEGV) |
7820 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
7821 | else if (CHARPOS (startp) > ZV) | |
7822 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
7823 | ||
7824 | /* Redisplay, then check if cursor has been set during the | |
7825 | redisplay. Give up if new fonts were loaded. */ | |
7826 | if (!try_window (window, startp)) | |
7827 | { | |
7828 | w->force_start = Qt; | |
7829 | clear_glyph_matrix (w->desired_matrix); | |
7830 | goto restore_buffers; | |
7831 | } | |
7832 | ||
7833 | if (w->cursor.vpos < 0) | |
7834 | { | |
7835 | /* If point does not appear, or on a line that is not fully | |
7836 | visible, move point so it does appear. The desired | |
7837 | matrix has been built above, so we can use it. */ | |
7838 | int height = window_box_height (w) / 2; | |
7839 | struct glyph_row *row = MATRIX_ROW (w->desired_matrix, 0); | |
7840 | ||
7841 | while (row->y < height) | |
7842 | ++row; | |
7843 | ||
7844 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
7845 | MATRIX_ROW_START_BYTEPOS (row)); | |
7846 | ||
90adcf20 | 7847 | if (w != XWINDOW (selected_window)) |
12adba34 | 7848 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
7849 | else if (current_buffer == old) |
7850 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
7851 | ||
7852 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
7853 | ||
7854 | /* If we are highlighting the region, then we just changed | |
7855 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
7856 | if (!NILP (Vtransient_mark_mode) |
7857 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 7858 | { |
5f5c8ee5 GM |
7859 | clear_glyph_matrix (w->desired_matrix); |
7860 | if (!try_window (window, startp)) | |
7861 | goto restore_buffers; | |
6f27fa9b | 7862 | } |
a2889657 | 7863 | } |
5f5c8ee5 GM |
7864 | |
7865 | make_cursor_line_fully_visible (w); | |
7866 | #if GLYPH_DEBUG | |
7867 | debug_method_add (w, "forced window start"); | |
7868 | #endif | |
a2889657 JB |
7869 | goto done; |
7870 | } | |
7871 | ||
5f5c8ee5 GM |
7872 | /* Handle case where text has not changed, only point, and it has |
7873 | not moved off the frame. */ | |
7874 | if (current_matrix_up_to_date_p | |
7875 | /* Point may be in this window. */ | |
7876 | && PT >= CHARPOS (startp) | |
7877 | /* If we don't check this, we are called to move the cursor in a | |
7878 | horizontally split window with a current matrix that doesn't | |
7879 | fit the display. */ | |
7880 | && !windows_or_buffers_changed | |
7881 | /* Selective display hasn't changed. */ | |
7882 | && !current_buffer->clip_changed | |
b1aa6cb3 RS |
7883 | /* If force-mode-line-update was called, really redisplay; |
7884 | that's how redisplay is forced after e.g. changing | |
7885 | buffer-invisibility-spec. */ | |
632ab665 | 7886 | && NILP (w->update_mode_line) |
5f5c8ee5 GM |
7887 | /* Can't use this case if highlighting a region. When a |
7888 | region exists, cursor movement has to do more than just | |
7889 | set the cursor. */ | |
7890 | && !(!NILP (Vtransient_mark_mode) | |
7891 | && !NILP (current_buffer->mark_active)) | |
bd66d1ba | 7892 | && NILP (w->region_showing) |
5f5c8ee5 GM |
7893 | /* Right after splitting windows, last_point may be nil. */ |
7894 | && INTEGERP (w->last_point) | |
7895 | /* This code is not used for mini-buffer for the sake of the case | |
7896 | of redisplaying to replace an echo area message; since in | |
7897 | that case the mini-buffer contents per se are usually | |
7898 | unchanged. This code is of no real use in the mini-buffer | |
7899 | since the handling of this_line_start_pos, etc., in redisplay | |
7900 | handles the same cases. */ | |
d45de95b | 7901 | && !EQ (window, minibuf_window) |
5f5c8ee5 GM |
7902 | /* When splitting windows or for new windows, it happens that |
7903 | redisplay is called with a nil window_end_vpos or one being | |
7904 | larger than the window. This should really be fixed in | |
7905 | window.c. I don't have this on my list, now, so we do | |
7906 | approximately the same as the old redisplay code. --gerd. */ | |
7907 | && INTEGERP (w->window_end_vpos) | |
7908 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
7909 | && (FRAME_WINDOW_P (f) | |
7910 | || !MARKERP (Voverlay_arrow_position) | |
377dbd97 | 7911 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) |
a2889657 | 7912 | { |
5f5c8ee5 GM |
7913 | int this_scroll_margin; |
7914 | struct glyph_row *row; | |
7915 | int scroll_p; | |
a2889657 | 7916 | |
5f5c8ee5 GM |
7917 | #if GLYPH_DEBUG |
7918 | debug_method_add (w, "cursor movement"); | |
7919 | #endif | |
9afd2168 | 7920 | |
5f5c8ee5 GM |
7921 | /* Scroll if point within this distance from the top or bottom |
7922 | of the window. This is a pixel value. */ | |
7923 | this_scroll_margin = max (0, scroll_margin); | |
7924 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
7925 | this_scroll_margin *= CANON_Y_UNIT (f); | |
7926 | ||
7927 | /* Start with the row the cursor was displayed during the last | |
7928 | not paused redisplay. Give up if that row is not valid. */ | |
7929 | if (w->last_cursor.vpos >= w->current_matrix->nrows) | |
7930 | goto try_to_scroll; | |
7931 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
7932 | if (row->mode_line_p) | |
7933 | ++row; | |
7934 | if (!row->enabled_p) | |
7935 | goto try_to_scroll; | |
7936 | ||
7937 | scroll_p = 0; | |
7938 | if (PT > XFASTINT (w->last_point)) | |
7939 | { | |
7940 | /* Point has moved forward. */ | |
7941 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
7942 | ||
7943 | while ((MATRIX_ROW_END_CHARPOS (row) < PT | |
7944 | /* The end position of a row equals the start | |
7945 | position of the next row. If PT is there, we | |
7946 | would rather display it in the next line, except | |
7947 | when this line ends in ZV. */ | |
7948 | || (MATRIX_ROW_END_CHARPOS (row) == PT | |
7949 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
7950 | || !row->ends_at_zv_p))) | |
7951 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
7952 | { | |
7953 | xassert (row->enabled_p); | |
7954 | ++row; | |
7955 | } | |
9afd2168 | 7956 | |
5f5c8ee5 GM |
7957 | /* If within the scroll margin, scroll. Note that |
7958 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which the | |
7959 | next line would be drawn, and that this_scroll_margin can | |
7960 | be zero. */ | |
7961 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
7962 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
7963 | /* Line is completely visible last line in window and PT | |
7964 | is to be set in the next line. */ | |
7965 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
7966 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
7967 | && !row->ends_at_zv_p | |
7968 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
7969 | scroll_p = 1; | |
7970 | } | |
7971 | else if (PT < XFASTINT (w->last_point)) | |
a2889657 | 7972 | { |
5f5c8ee5 GM |
7973 | /* Cursor has to be moved backward. Note that PT >= |
7974 | CHARPOS (startp) because of the outer if-statement. */ | |
7975 | while (!row->mode_line_p | |
7976 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
7977 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
7978 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
7979 | && (row->y > this_scroll_margin | |
7980 | || CHARPOS (startp) == BEGV)) | |
a2889657 | 7981 | { |
5f5c8ee5 GM |
7982 | xassert (row->enabled_p); |
7983 | --row; | |
a2889657 | 7984 | } |
abb4c08f | 7985 | |
5f5c8ee5 GM |
7986 | /* Consider the following case: Window starts at BEGV, there |
7987 | is invisible, intangible text at BEGV, so that display | |
7988 | starts at some point START > BEGV. It can happen that | |
7989 | we are called with PT somewhere between BEGV and START. | |
7990 | Try to handle that case. */ | |
7991 | if (row < w->current_matrix->rows | |
7992 | || row->mode_line_p) | |
7993 | { | |
7994 | row = w->current_matrix->rows; | |
7995 | if (row->mode_line_p) | |
7996 | ++row; | |
7997 | } | |
7998 | ||
7999 | /* Due to newlines in overlay strings, we may have to skip | |
8000 | forward over overlay strings. */ | |
8001 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
8002 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
8003 | && !row->ends_at_zv_p) | |
8004 | ++row; | |
8005 | ||
8006 | /* If within the scroll margin, scroll. */ | |
8007 | if (row->y < this_scroll_margin | |
8008 | && CHARPOS (startp) != BEGV) | |
8009 | scroll_p = 1; | |
8010 | } | |
8011 | ||
8012 | /* if PT is not in the glyph row, give up. */ | |
8013 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8014 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8015 | goto try_to_scroll; | |
8016 | ||
8017 | /* If we end up in a partially visible line, let's make it fully | |
8018 | visible. This can be done most easily by using the existing | |
8019 | scrolling code. */ | |
8020 | if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8021 | { | |
8022 | temp_scroll_step = 1; | |
8023 | goto try_to_scroll; | |
a2889657 | 8024 | } |
5f5c8ee5 GM |
8025 | else if (scroll_p) |
8026 | goto try_to_scroll; | |
8027 | ||
8028 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8029 | goto done; | |
a2889657 | 8030 | } |
5f5c8ee5 | 8031 | |
a2889657 JB |
8032 | /* If current starting point was originally the beginning of a line |
8033 | but no longer is, find a new starting point. */ | |
265a9e55 | 8034 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
8035 | && !(CHARPOS (startp) <= BEGV |
8036 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 8037 | { |
5f5c8ee5 GM |
8038 | #if GLYPH_DEBUG |
8039 | debug_method_add (w, "recenter 1"); | |
8040 | #endif | |
a2889657 JB |
8041 | goto recenter; |
8042 | } | |
5f5c8ee5 GM |
8043 | |
8044 | /* Try scrolling with try_window_id. */ | |
8045 | else if (!windows_or_buffers_changed | |
8046 | /* Window must be either use window-based redisplay or | |
8047 | be full width. */ | |
8048 | && (FRAME_WINDOW_P (f) | |
8049 | || ((line_ins_del_ok && WINDOW_FULL_WIDTH_P (w)) | |
8050 | && just_this_one_p)) | |
8051 | && !MINI_WINDOW_P (w) | |
8052 | /* Point is not known NOT to appear in window. */ | |
8053 | && PT >= CHARPOS (startp) | |
a2889657 | 8054 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
8055 | /* Window is not hscrolled. */ |
8056 | && XFASTINT (w->hscroll) == 0 | |
8057 | /* Selective display has not changed. */ | |
8058 | && !current_buffer->clip_changed | |
8059 | /* Current matrix is up to date. */ | |
8060 | && !NILP (w->window_end_valid) | |
8061 | /* Can't use this case if highlighting a region because | |
8062 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
8063 | && !(!NILP (Vtransient_mark_mode) |
8064 | && !NILP (current_buffer->mark_active)) | |
8065 | && NILP (w->region_showing) | |
5f5c8ee5 | 8066 | /* Overlay arrow position and string not changed. */ |
d45de95b | 8067 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 8068 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
8069 | /* Value is > 0 if update has been done, it is -1 if we |
8070 | know that the same window start will not work. It is 0 | |
8071 | if unsuccessful for some other reason. */ | |
8072 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 8073 | { |
5f5c8ee5 GM |
8074 | #if GLYPH_DEBUG |
8075 | debug_method_add (w, "try_window_id"); | |
8076 | #endif | |
8077 | ||
8078 | if (fonts_changed_p) | |
8079 | goto restore_buffers; | |
a2889657 JB |
8080 | if (tem > 0) |
8081 | goto done; | |
5f5c8ee5 GM |
8082 | /* Otherwise try_window_id has returned -1 which means that we |
8083 | don't want the alternative below this comment to execute. */ | |
a2889657 | 8084 | } |
5f5c8ee5 GM |
8085 | else if (CHARPOS (startp) >= BEGV |
8086 | && CHARPOS (startp) <= ZV | |
8087 | && PT >= CHARPOS (startp) | |
8088 | && (CHARPOS (startp) < ZV | |
e9874cee | 8089 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 8090 | || CHARPOS (startp) == BEGV |
8850a573 RS |
8091 | || (XFASTINT (w->last_modified) >= MODIFF |
8092 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 8093 | { |
5f5c8ee5 GM |
8094 | #if GLYPH_DEBUG |
8095 | debug_method_add (w, "same window start"); | |
8096 | #endif | |
8097 | ||
8098 | /* Try to redisplay starting at same place as before. | |
8099 | If point has not moved off frame, accept the results. */ | |
8100 | if (!current_matrix_up_to_date_p | |
8101 | /* Don't use try_window_reusing_current_matrix in this case | |
8102 | because it can have changed the buffer. */ | |
8103 | || !NILP (Vwindow_scroll_functions) | |
8104 | || MINI_WINDOW_P (w) | |
8105 | || !try_window_reusing_current_matrix (w)) | |
8106 | { | |
8107 | IF_DEBUG (debug_method_add (w, "1")); | |
8108 | try_window (window, startp); | |
8109 | } | |
8110 | ||
8111 | if (fonts_changed_p) | |
8112 | goto restore_buffers; | |
8113 | ||
8114 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 8115 | { |
5f5c8ee5 GM |
8116 | if (!just_this_one_p |
8117 | || current_buffer->clip_changed | |
8118 | || beg_unchanged < CHARPOS (startp)) | |
aa6d10fa RS |
8119 | /* Forget any recorded base line for line number display. */ |
8120 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
8121 | |
8122 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
8123 | goto done; |
8124 | } | |
a2889657 | 8125 | else |
5f5c8ee5 | 8126 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
8127 | } |
8128 | ||
5f5c8ee5 GM |
8129 | try_to_scroll: |
8130 | ||
c2213350 | 8131 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8132 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 8133 | |
e481f960 RS |
8134 | /* Redisplay the mode line. Select the buffer properly for that. */ |
8135 | if (!update_mode_line) | |
8136 | { | |
5ba50c51 RS |
8137 | if (!really_switched_buffer) |
8138 | { | |
8139 | set_buffer_temp (old); | |
8140 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8141 | really_switched_buffer = 1; |
5ba50c51 | 8142 | } |
e481f960 RS |
8143 | update_mode_line = 1; |
8144 | w->update_mode_line = Qt; | |
8145 | } | |
a2889657 | 8146 | |
5f5c8ee5 GM |
8147 | /* Try to scroll by specified few lines. */ |
8148 | if ((scroll_conservatively | |
8149 | || scroll_step | |
8150 | || temp_scroll_step | |
8151 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
8152 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 8153 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
8154 | && CHARPOS (startp) >= BEGV |
8155 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 8156 | { |
5f5c8ee5 GM |
8157 | /* The function returns -1 if new fonts were loaded, 1 if |
8158 | successful, 0 if not successful. */ | |
8159 | int rc = try_scrolling (window, just_this_one_p, | |
8160 | scroll_conservatively, | |
8161 | scroll_step, | |
8162 | temp_scroll_step); | |
8163 | if (rc > 0) | |
8164 | goto done; | |
8165 | else if (rc < 0) | |
8166 | goto restore_buffers; | |
8167 | } | |
f9c8af06 | 8168 | |
5f5c8ee5 | 8169 | /* Finally, just choose place to start which centers point */ |
5936754e | 8170 | |
5f5c8ee5 | 8171 | recenter: |
44173109 | 8172 | |
5f5c8ee5 GM |
8173 | #if GLYPH_DEBUG |
8174 | debug_method_add (w, "recenter"); | |
8175 | #endif | |
0789adb2 | 8176 | |
5f5c8ee5 | 8177 | /* w->vscroll = 0; */ |
0789adb2 | 8178 | |
5f5c8ee5 GM |
8179 | /* Forget any previously recorded base line for line number display. */ |
8180 | if (!current_matrix_up_to_date_p | |
8181 | || current_buffer->clip_changed) | |
8182 | w->base_line_number = Qnil; | |
8183 | ||
8184 | /* Move backward half the height of the window. */ | |
8185 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8186 | it.current_y = it.last_visible_y; | |
8187 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
8188 | xassert (IT_CHARPOS (it) >= BEGV); | |
8189 | ||
8190 | /* The function move_it_vertically_backward may move over more | |
8191 | than the specified y-distance. If it->w is small, e.g. a | |
8192 | mini-buffer window, we may end up in front of the window's | |
8193 | display area. Start displaying at the start of the line | |
8194 | containing PT in this case. */ | |
8195 | if (it.current_y <= 0) | |
8196 | { | |
8197 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8198 | move_it_vertically (&it, 0); | |
8199 | xassert (IT_CHARPOS (it) <= PT); | |
8200 | it.current_y = 0; | |
0789adb2 RS |
8201 | } |
8202 | ||
5f5c8ee5 GM |
8203 | it.current_x = it.hpos = 0; |
8204 | ||
8205 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
8206 | in case the window-scroll-functions functions get errors. */ | |
8207 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
8208 | ||
8209 | /* Run scroll hooks. */ | |
8210 | startp = run_window_scroll_functions (window, it.current.pos); | |
8211 | ||
8212 | /* Redisplay the window. */ | |
8213 | if (!current_matrix_up_to_date_p | |
8214 | || windows_or_buffers_changed | |
8215 | /* Don't use try_window_reusing_current_matrix in this case | |
8216 | because it can have changed the buffer. */ | |
8217 | || !NILP (Vwindow_scroll_functions) | |
8218 | || !just_this_one_p | |
8219 | || MINI_WINDOW_P (w) | |
8220 | || !try_window_reusing_current_matrix (w)) | |
8221 | try_window (window, startp); | |
8222 | ||
8223 | /* If new fonts have been loaded (due to fontsets), give up. We | |
8224 | have to start a new redisplay since we need to re-adjust glyph | |
8225 | matrices. */ | |
8226 | if (fonts_changed_p) | |
8227 | goto restore_buffers; | |
8228 | ||
8229 | /* If cursor did not appear assume that the middle of the window is | |
8230 | in the first line of the window. Do it again with the next line. | |
8231 | (Imagine a window of height 100, displaying two lines of height | |
8232 | 60. Moving back 50 from it->last_visible_y will end in the first | |
8233 | line.) */ | |
8234 | if (w->cursor.vpos < 0) | |
a2889657 | 8235 | { |
5f5c8ee5 GM |
8236 | if (!NILP (w->window_end_valid) |
8237 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 8238 | { |
5f5c8ee5 GM |
8239 | clear_glyph_matrix (w->desired_matrix); |
8240 | move_it_by_lines (&it, 1, 0); | |
8241 | try_window (window, it.current.pos); | |
a2889657 | 8242 | } |
5f5c8ee5 | 8243 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 8244 | { |
5f5c8ee5 GM |
8245 | clear_glyph_matrix (w->desired_matrix); |
8246 | move_it_by_lines (&it, -1, 0); | |
8247 | try_window (window, it.current.pos); | |
8248 | } | |
8249 | else | |
8250 | { | |
8251 | /* Not much we can do about it. */ | |
a2889657 | 8252 | } |
a2889657 | 8253 | } |
010494d0 | 8254 | |
5f5c8ee5 GM |
8255 | /* Consider the following case: Window starts at BEGV, there is |
8256 | invisible, intangible text at BEGV, so that display starts at | |
8257 | some point START > BEGV. It can happen that we are called with | |
8258 | PT somewhere between BEGV and START. Try to handle that case. */ | |
8259 | if (w->cursor.vpos < 0) | |
835766b6 | 8260 | { |
5f5c8ee5 GM |
8261 | struct glyph_row *row = w->current_matrix->rows; |
8262 | if (row->mode_line_p) | |
8263 | ++row; | |
8264 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 8265 | } |
5f5c8ee5 GM |
8266 | |
8267 | make_cursor_line_fully_visible (w); | |
b5174a51 | 8268 | |
5f5c8ee5 GM |
8269 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
8270 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
8271 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
8272 | ? Qt : Qnil); | |
a2889657 | 8273 | |
5f5c8ee5 | 8274 | done: |
a2889657 | 8275 | |
5f5c8ee5 | 8276 | /* Display the mode line, if we must. */ |
e481f960 | 8277 | if ((update_mode_line |
aa6d10fa | 8278 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
8279 | if (a) the window to its side is being redone and |
8280 | (b) we do a frame-based redisplay. This is a consequence | |
8281 | of how inverted lines are drawn in frame-based redisplay. */ | |
8282 | || (!just_this_one_p | |
8283 | && !FRAME_WINDOW_P (f) | |
8284 | && !WINDOW_FULL_WIDTH_P (w)) | |
8285 | /* Line number to display. */ | |
155ef550 | 8286 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 8287 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
8288 | || (!NILP (w->column_number_displayed) |
8289 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
8290 | /* This means that the window has a mode line. */ |
8291 | && (WINDOW_WANTS_MODELINE_P (w) | |
8292 | || WINDOW_WANTS_TOP_LINE_P (w))) | |
5ba50c51 | 8293 | { |
5f5c8ee5 GM |
8294 | display_mode_lines (w); |
8295 | ||
8296 | /* If mode line height has changed, arrange for a thorough | |
8297 | immediate redisplay using the correct mode line height. */ | |
8298 | if (WINDOW_WANTS_MODELINE_P (w) | |
8299 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 8300 | { |
5f5c8ee5 GM |
8301 | fonts_changed_p = 1; |
8302 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
8303 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 8304 | } |
5f5c8ee5 GM |
8305 | |
8306 | /* If top line height has changed, arrange for a thorough | |
8307 | immediate redisplay using the correct mode line height. */ | |
8308 | if (WINDOW_WANTS_TOP_LINE_P (w) | |
8309 | && CURRENT_TOP_LINE_HEIGHT (w) != DESIRED_TOP_LINE_HEIGHT (w)) | |
8310 | { | |
8311 | fonts_changed_p = 1; | |
8312 | MATRIX_TOP_LINE_ROW (w->current_matrix)->height | |
8313 | = DESIRED_TOP_LINE_HEIGHT (w); | |
8314 | } | |
8315 | ||
8316 | if (fonts_changed_p) | |
8317 | goto restore_buffers; | |
5ba50c51 | 8318 | } |
5f5c8ee5 GM |
8319 | |
8320 | if (!line_number_displayed | |
8321 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
8322 | { |
8323 | w->base_line_pos = Qnil; | |
8324 | w->base_line_number = Qnil; | |
8325 | } | |
a2889657 | 8326 | |
5f5c8ee5 GM |
8327 | finish_menu_bars: |
8328 | ||
7ce2c095 | 8329 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 8330 | if (update_mode_line |
5f5c8ee5 GM |
8331 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
8332 | { | |
8333 | int redisplay_menu_p = 0; | |
8334 | ||
8335 | if (FRAME_WINDOW_P (f)) | |
8336 | { | |
dc937613 | 8337 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 8338 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 8339 | #else |
5f5c8ee5 | 8340 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 8341 | #endif |
5f5c8ee5 GM |
8342 | } |
8343 | else | |
8344 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
8345 | ||
8346 | if (redisplay_menu_p) | |
8347 | display_menu_bar (w); | |
8348 | ||
8349 | #ifdef HAVE_WINDOW_SYSTEM | |
8350 | if (WINDOWP (f->toolbar_window) | |
8351 | && (FRAME_TOOLBAR_LINES (f) > 0 | |
8352 | || auto_resize_toolbars_p)) | |
8353 | redisplay_toolbar (f); | |
8354 | #endif | |
8355 | } | |
7ce2c095 | 8356 | |
88f22aff | 8357 | finish_scroll_bars: |
5f5c8ee5 | 8358 | |
88f22aff | 8359 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 8360 | { |
b1d1124b | 8361 | int start, end, whole; |
30c566e4 | 8362 | |
b1d1124b | 8363 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
8364 | At some point, it would be nice to choose between scrollbars |
8365 | which reflect the whole buffer size, with special markers | |
8366 | indicating narrowing, and scrollbars which reflect only the | |
8367 | visible region. | |
8368 | ||
5f5c8ee5 | 8369 | Note that mini-buffers sometimes aren't displaying any text. */ |
b1d1124b | 8370 | if (! MINI_WINDOW_P (w) |
5f5c8ee5 GM |
8371 | || (w == XWINDOW (minibuf_window) |
8372 | && !echo_area_glyphs | |
8373 | && !STRINGP (echo_area_message))) | |
b1d1124b | 8374 | { |
8a9311d7 | 8375 | whole = ZV - BEGV; |
4d641a15 | 8376 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
8377 | /* I don't think this is guaranteed to be right. For the |
8378 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 8379 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 8380 | |
5f5c8ee5 GM |
8381 | if (end < start) |
8382 | end = start; | |
8383 | if (whole < (end - start)) | |
8384 | whole = end - start; | |
b1d1124b JB |
8385 | } |
8386 | else | |
8387 | start = end = whole = 0; | |
30c566e4 | 8388 | |
88f22aff | 8389 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 8390 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 8391 | |
5f5c8ee5 GM |
8392 | /* Note that we actually used the scroll bar attached to this |
8393 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 8394 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 8395 | } |
b1d1124b | 8396 | |
5f5c8ee5 GM |
8397 | restore_buffers: |
8398 | ||
8399 | /* Restore current_buffer and value of point in it. */ | |
8400 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
5ba50c51 | 8401 | if (really_switched_buffer) |
f72df6ac | 8402 | set_buffer_internal_1 (old); |
e481f960 RS |
8403 | else |
8404 | set_buffer_temp (old); | |
5f5c8ee5 | 8405 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
8406 | |
8407 | unbind_to (count, Qnil); | |
a2889657 | 8408 | } |
a2889657 | 8409 | |
5f5c8ee5 GM |
8410 | |
8411 | /* Build the complete desired matrix of WINDOW with a window start | |
8412 | buffer position POS. Value is non-zero if successful. It is zero | |
8413 | if fonts were loaded during redisplay which makes re-adjusting | |
8414 | glyph matrices necessary. */ | |
8415 | ||
8416 | int | |
a2889657 JB |
8417 | try_window (window, pos) |
8418 | Lisp_Object window; | |
5f5c8ee5 GM |
8419 | struct text_pos pos; |
8420 | { | |
8421 | struct window *w = XWINDOW (window); | |
8422 | struct it it; | |
8423 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 8424 | |
5f5c8ee5 GM |
8425 | /* Make POS the new window start. */ |
8426 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 8427 | |
5f5c8ee5 GM |
8428 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
8429 | w->cursor.vpos = -1; | |
a2889657 | 8430 | overlay_arrow_seen = 0; |
642eefc6 | 8431 | |
5f5c8ee5 GM |
8432 | /* Initialize iterator and info to start at POS. */ |
8433 | start_display (&it, w, pos); | |
a2889657 | 8434 | |
5f5c8ee5 GM |
8435 | /* Display all lines of W. */ |
8436 | while (it.current_y < it.last_visible_y) | |
8437 | { | |
8438 | if (display_line (&it)) | |
8439 | last_text_row = it.glyph_row - 1; | |
8440 | if (fonts_changed_p) | |
8441 | return 0; | |
8442 | } | |
a2889657 | 8443 | |
5f5c8ee5 GM |
8444 | /* If bottom moved off end of frame, change mode line percentage. */ |
8445 | if (XFASTINT (w->window_end_pos) <= 0 | |
8446 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
8447 | w->update_mode_line = Qt; |
8448 | ||
5f5c8ee5 GM |
8449 | /* Set window_end_pos to the offset of the last character displayed |
8450 | on the window from the end of current_buffer. Set | |
8451 | window_end_vpos to its row number. */ | |
8452 | if (last_text_row) | |
8453 | { | |
8454 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
8455 | w->window_end_bytepos | |
8456 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
8457 | XSETFASTINT (w->window_end_pos, | |
8458 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
8459 | XSETFASTINT (w->window_end_vpos, | |
8460 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
8461 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
8462 | ->displays_text_p); | |
8463 | } | |
8464 | else | |
8465 | { | |
8466 | w->window_end_bytepos = 0; | |
8467 | XSETFASTINT (w->window_end_pos, 0); | |
8468 | XSETFASTINT (w->window_end_vpos, 0); | |
8469 | } | |
8470 | ||
a2889657 JB |
8471 | /* But that is not valid info until redisplay finishes. */ |
8472 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 8473 | return 1; |
a2889657 | 8474 | } |
5f5c8ee5 GM |
8475 | |
8476 | ||
a2889657 | 8477 | \f |
5f5c8ee5 GM |
8478 | /************************************************************************ |
8479 | Window redisplay reusing current matrix when buffer has not changed | |
8480 | ************************************************************************/ | |
8481 | ||
8482 | /* Try redisplay of window W showing an unchanged buffer with a | |
8483 | different window start than the last time it was displayed by | |
8484 | reusing its current matrix. Value is non-zero if successful. | |
8485 | W->start is the new window start. */ | |
a2889657 JB |
8486 | |
8487 | static int | |
5f5c8ee5 GM |
8488 | try_window_reusing_current_matrix (w) |
8489 | struct window *w; | |
a2889657 | 8490 | { |
5f5c8ee5 GM |
8491 | struct frame *f = XFRAME (w->frame); |
8492 | struct glyph_row *row, *bottom_row; | |
8493 | struct it it; | |
8494 | struct run run; | |
8495 | struct text_pos start, new_start; | |
8496 | int nrows_scrolled, i; | |
8497 | struct glyph_row *last_text_row; | |
8498 | struct glyph_row *last_reused_text_row; | |
8499 | struct glyph_row *start_row; | |
8500 | int start_vpos, min_y, max_y; | |
8501 | ||
8502 | /* Right now this function doesn't handle terminal frames. */ | |
8503 | if (!FRAME_WINDOW_P (f)) | |
8504 | return 0; | |
a2889657 | 8505 | |
5f5c8ee5 GM |
8506 | /* Can't do this if region may have changed. */ |
8507 | if ((!NILP (Vtransient_mark_mode) | |
8508 | && !NILP (current_buffer->mark_active)) | |
8509 | || !NILP (w->region_showing)) | |
8510 | return 0; | |
a2889657 | 8511 | |
5f5c8ee5 GM |
8512 | /* If top-line visibility has changed, give up. */ |
8513 | if (WINDOW_WANTS_TOP_LINE_P (w) | |
8514 | != MATRIX_TOP_LINE_ROW (w->current_matrix)->mode_line_p) | |
8515 | return 0; | |
8516 | ||
8517 | /* Give up if old or new display is scrolled vertically. We could | |
8518 | make this function handle this, but right now it doesn't. */ | |
8519 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8520 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
8521 | return 0; | |
8522 | ||
8523 | /* The variable new_start now holds the new window start. The old | |
8524 | start `start' can be determined from the current matrix. */ | |
8525 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
8526 | start = start_row->start.pos; | |
8527 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 8528 | |
5f5c8ee5 GM |
8529 | /* Clear the desired matrix for the display below. */ |
8530 | clear_glyph_matrix (w->desired_matrix); | |
8531 | ||
8532 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
8533 | { | |
8534 | int first_row_y; | |
8535 | ||
8536 | IF_DEBUG (debug_method_add (w, "twu1")); | |
8537 | ||
8538 | /* Display up to a row that can be reused. The variable | |
8539 | last_text_row is set to the last row displayed that displays | |
8540 | text. */ | |
8541 | start_display (&it, w, new_start); | |
8542 | first_row_y = it.current_y; | |
8543 | w->cursor.vpos = -1; | |
8544 | last_text_row = last_reused_text_row = NULL; | |
8545 | while (it.current_y < it.last_visible_y | |
8546 | && IT_CHARPOS (it) < CHARPOS (start) | |
8547 | && !fonts_changed_p) | |
8548 | if (display_line (&it)) | |
8549 | last_text_row = it.glyph_row - 1; | |
8550 | ||
8551 | /* A value of current_y < last_visible_y means that we stopped | |
8552 | at the previous window start, which in turn means that we | |
8553 | have at least one reusable row. */ | |
8554 | if (it.current_y < it.last_visible_y) | |
a2889657 | 8555 | { |
5f5c8ee5 GM |
8556 | nrows_scrolled = it.vpos; |
8557 | ||
8558 | /* Find PT if not already found in the lines displayed. */ | |
8559 | if (w->cursor.vpos < 0) | |
a2889657 | 8560 | { |
5f5c8ee5 GM |
8561 | int dy = it.current_y - first_row_y; |
8562 | ||
8563 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8564 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8565 | { | |
8566 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
8567 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
8568 | { | |
8569 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
8570 | dy, nrows_scrolled); | |
8571 | break; | |
8572 | } | |
8573 | ||
8574 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
8575 | break; | |
8576 | ||
8577 | ++row; | |
8578 | } | |
8579 | ||
8580 | /* Give up if point was not found. This shouldn't | |
8581 | happen often; not more often than with try_window | |
8582 | itself. */ | |
8583 | if (w->cursor.vpos < 0) | |
8584 | { | |
8585 | clear_glyph_matrix (w->desired_matrix); | |
8586 | return 0; | |
8587 | } | |
a2889657 | 8588 | } |
5f5c8ee5 GM |
8589 | |
8590 | /* Scroll the display. Do it before the current matrix is | |
8591 | changed. The problem here is that update has not yet | |
8592 | run, i.e. part of the current matrix is not up to date. | |
8593 | scroll_run_hook will clear the cursor, and use the | |
8594 | current matrix to get the height of the row the cursor is | |
8595 | in. */ | |
8596 | run.current_y = first_row_y; | |
8597 | run.desired_y = it.current_y; | |
8598 | run.height = it.last_visible_y - it.current_y; | |
8599 | if (run.height > 0) | |
a2889657 | 8600 | { |
5f5c8ee5 GM |
8601 | update_begin (f); |
8602 | rif->update_window_begin_hook (w); | |
8603 | rif->scroll_run_hook (w, &run); | |
8604 | rif->update_window_end_hook (w, 0); | |
8605 | update_end (f); | |
a2889657 | 8606 | } |
5f5c8ee5 GM |
8607 | |
8608 | /* Shift current matrix down by nrows_scrolled lines. */ | |
8609 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
8610 | rotate_matrix (w->current_matrix, | |
8611 | start_vpos, | |
8612 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
8613 | nrows_scrolled); | |
8614 | ||
8615 | /* Disable lines not reused. */ | |
8616 | for (i = 0; i < it.vpos; ++i) | |
8617 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
8618 | ||
8619 | /* Re-compute Y positions. */ | |
8620 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
8621 | min_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
8622 | max_y = it.last_visible_y; | |
8623 | while (row < bottom_row) | |
d2f84654 | 8624 | { |
5f5c8ee5 GM |
8625 | row->y = it.current_y; |
8626 | ||
8627 | if (row->y < min_y) | |
8628 | row->visible_height = row->height - (min_y - row->y); | |
8629 | else if (row->y + row->height > max_y) | |
8630 | row->visible_height | |
8631 | = row->height - (row->y + row->height - max_y); | |
8632 | else | |
8633 | row->visible_height = row->height; | |
8634 | ||
8635 | it.current_y += row->height; | |
8636 | ++it.vpos; | |
8637 | ||
8638 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8639 | last_reused_text_row = row; | |
8640 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
8641 | break; | |
8642 | ++row; | |
d2f84654 | 8643 | } |
a2889657 | 8644 | } |
5f5c8ee5 GM |
8645 | |
8646 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
8647 | reused row from the current matrix containing text, if any. | |
8648 | The value of last_text_row is the last displayed line | |
8649 | containing text. */ | |
8650 | if (last_reused_text_row) | |
a2889657 | 8651 | { |
5f5c8ee5 GM |
8652 | w->window_end_bytepos |
8653 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
8654 | XSETFASTINT (w->window_end_pos, | |
8655 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
8656 | XSETFASTINT (w->window_end_vpos, | |
8657 | MATRIX_ROW_VPOS (last_reused_text_row, | |
8658 | w->current_matrix)); | |
a2889657 | 8659 | } |
5f5c8ee5 GM |
8660 | else if (last_text_row) |
8661 | { | |
8662 | w->window_end_bytepos | |
8663 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
8664 | XSETFASTINT (w->window_end_pos, | |
8665 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
8666 | XSETFASTINT (w->window_end_vpos, | |
8667 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
8668 | } | |
8669 | else | |
8670 | { | |
8671 | /* This window must be completely empty. */ | |
8672 | w->window_end_bytepos = 0; | |
8673 | XSETFASTINT (w->window_end_pos, 0); | |
8674 | XSETFASTINT (w->window_end_vpos, 0); | |
8675 | } | |
8676 | w->window_end_valid = Qnil; | |
a2889657 | 8677 | |
5f5c8ee5 GM |
8678 | /* Update hint: don't try scrolling again in update_window. */ |
8679 | w->desired_matrix->no_scrolling_p = 1; | |
8680 | ||
8681 | #if GLYPH_DEBUG | |
8682 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
8683 | #endif | |
8684 | return 1; | |
a2889657 | 8685 | } |
5f5c8ee5 GM |
8686 | else if (CHARPOS (new_start) > CHARPOS (start)) |
8687 | { | |
8688 | struct glyph_row *pt_row, *row; | |
8689 | struct glyph_row *first_reusable_row; | |
8690 | struct glyph_row *first_row_to_display; | |
8691 | int dy; | |
8692 | int yb = window_text_bottom_y (w); | |
8693 | ||
8694 | IF_DEBUG (debug_method_add (w, "twu2")); | |
8695 | ||
8696 | /* Find the row starting at new_start, if there is one. Don't | |
8697 | reuse a partially visible line at the end. */ | |
8698 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8699 | while (first_reusable_row->enabled_p | |
8700 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
8701 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
8702 | < CHARPOS (new_start))) | |
8703 | ++first_reusable_row; | |
8704 | ||
8705 | /* Give up if there is no row to reuse. */ | |
8706 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
8707 | || !first_reusable_row->enabled_p) | |
8708 | return 0; | |
8709 | ||
8710 | /* The row we found must start at new_start, or else something | |
8711 | is broken. */ | |
8712 | xassert (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
8713 | == CHARPOS (new_start)); | |
8714 | ||
8715 | /* We can reuse fully visible rows beginning with | |
8716 | first_reusable_row to the end of the window. Set | |
8717 | first_row_to_display to the first row that cannot be reused. | |
8718 | Set pt_row to the row containing point, if there is any. */ | |
8719 | first_row_to_display = first_reusable_row; | |
8720 | pt_row = NULL; | |
8721 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
8722 | { | |
8723 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
8724 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
8725 | pt_row = first_row_to_display; | |
a2889657 | 8726 | |
5f5c8ee5 GM |
8727 | ++first_row_to_display; |
8728 | } | |
a2889657 | 8729 | |
5f5c8ee5 GM |
8730 | /* Start displaying at the start of first_row_to_display. */ |
8731 | xassert (first_row_to_display->y < yb); | |
8732 | init_to_row_start (&it, w, first_row_to_display); | |
8733 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
8734 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
8735 | - nrows_scrolled); | |
8736 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
8737 | ||
8738 | /* Display lines beginning with first_row_to_display in the | |
8739 | desired matrix. Set last_text_row to the last row displayed | |
8740 | that displays text. */ | |
8741 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
8742 | if (pt_row == NULL) | |
8743 | w->cursor.vpos = -1; | |
8744 | last_text_row = NULL; | |
8745 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
8746 | if (display_line (&it)) | |
8747 | last_text_row = it.glyph_row - 1; | |
8748 | ||
8749 | /* Give up If point isn't in a row displayed or reused. */ | |
8750 | if (w->cursor.vpos < 0) | |
8751 | { | |
8752 | clear_glyph_matrix (w->desired_matrix); | |
8753 | return 0; | |
8754 | } | |
12adba34 | 8755 | |
5f5c8ee5 GM |
8756 | /* If point is in a reused row, adjust y and vpos of the cursor |
8757 | position. */ | |
8758 | if (pt_row) | |
8759 | { | |
8760 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
8761 | w->current_matrix); | |
8762 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
8763 | } |
8764 | ||
5f5c8ee5 GM |
8765 | /* Scroll the display. */ |
8766 | run.current_y = first_reusable_row->y; | |
8767 | run.desired_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
8768 | run.height = it.last_visible_y - run.current_y; | |
8769 | if (run.height) | |
8770 | { | |
8771 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
8772 | update_begin (f); | |
8773 | rif->update_window_begin_hook (w); | |
8774 | rif->scroll_run_hook (w, &run); | |
8775 | rif->update_window_end_hook (w, 0); | |
8776 | update_end (f); | |
8777 | } | |
a2889657 | 8778 | |
5f5c8ee5 GM |
8779 | /* Adjust Y positions of reused rows. */ |
8780 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
8781 | row = first_reusable_row; | |
8782 | dy = first_reusable_row->y; | |
8783 | min_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
8784 | max_y = it.last_visible_y; | |
8785 | while (row < first_row_to_display) | |
8786 | { | |
8787 | row->y -= dy; | |
8788 | if (row->y < min_y) | |
8789 | row->visible_height = row->height - (min_y - row->y); | |
8790 | else if (row->y + row->height > max_y) | |
8791 | row->visible_height | |
8792 | = row->height - (row->y + row->height - max_y); | |
8793 | else | |
8794 | row->visible_height = row->height; | |
8795 | ++row; | |
8796 | } | |
a2889657 | 8797 | |
5f5c8ee5 GM |
8798 | /* Disable rows not reused. */ |
8799 | while (row < bottom_row) | |
8800 | { | |
8801 | row->enabled_p = 0; | |
8802 | ++row; | |
8803 | } | |
8804 | ||
8805 | /* Scroll the current matrix. */ | |
8806 | xassert (nrows_scrolled > 0); | |
8807 | rotate_matrix (w->current_matrix, | |
8808 | start_vpos, | |
8809 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
8810 | -nrows_scrolled); | |
8811 | ||
8812 | /* Adjust window end. A null value of last_text_row means that | |
8813 | the window end is in reused rows which in turn means that | |
8814 | only its vpos can have changed. */ | |
8815 | if (last_text_row) | |
8816 | { | |
8817 | w->window_end_bytepos | |
8818 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
8819 | XSETFASTINT (w->window_end_pos, | |
8820 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
8821 | XSETFASTINT (w->window_end_vpos, | |
8822 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
8823 | } | |
8824 | else | |
a2889657 | 8825 | { |
e8e536a9 | 8826 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 8827 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 8828 | } |
5f5c8ee5 GM |
8829 | |
8830 | w->window_end_valid = Qnil; | |
8831 | w->desired_matrix->no_scrolling_p = 1; | |
8832 | ||
8833 | #if GLYPH_DEBUG | |
8834 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
8835 | #endif | |
8836 | return 1; | |
a2889657 | 8837 | } |
5f5c8ee5 GM |
8838 | |
8839 | return 0; | |
8840 | } | |
a2889657 | 8841 | |
a2889657 | 8842 | |
5f5c8ee5 GM |
8843 | \f |
8844 | /************************************************************************ | |
8845 | Window redisplay reusing current matrix when buffer has changed | |
8846 | ************************************************************************/ | |
8847 | ||
8848 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
8849 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
8850 | int *, int *)); | |
8851 | static struct glyph_row * | |
8852 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
8853 | struct glyph_row *)); | |
8854 | ||
8855 | ||
8856 | /* Return the last row in MATRIX displaying text. If row START is | |
8857 | non-null, start searching with that row. IT gives the dimensions | |
8858 | of the display. Value is null if matrix is empty; otherwise it is | |
8859 | a pointer to the row found. */ | |
8860 | ||
8861 | static struct glyph_row * | |
8862 | find_last_row_displaying_text (matrix, it, start) | |
8863 | struct glyph_matrix *matrix; | |
8864 | struct it *it; | |
8865 | struct glyph_row *start; | |
8866 | { | |
8867 | struct glyph_row *row, *row_found; | |
8868 | ||
8869 | /* Set row_found to the last row in IT->w's current matrix | |
8870 | displaying text. The loop looks funny but think of partially | |
8871 | visible lines. */ | |
8872 | row_found = NULL; | |
8873 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
8874 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8875 | { | |
8876 | xassert (row->enabled_p); | |
8877 | row_found = row; | |
8878 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
8879 | break; | |
8880 | ++row; | |
a2889657 | 8881 | } |
5f5c8ee5 GM |
8882 | |
8883 | return row_found; | |
8884 | } | |
8885 | ||
a2889657 | 8886 | |
5f5c8ee5 GM |
8887 | /* Return the last row in the current matrix of W that is not affected |
8888 | by changes at the start of current_buffer that occurred since the | |
8889 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 8890 | |
5f5c8ee5 GM |
8891 | The global variable beg_unchanged has to contain the number of |
8892 | bytes unchanged at the start of current_buffer. BEG + | |
8893 | beg_unchanged is the buffer position of the first changed byte in | |
8894 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
8895 | at the same buffer positions as they were when the current matrix | |
8896 | was built. */ | |
8897 | ||
8898 | static struct glyph_row * | |
8899 | get_last_unchanged_at_beg_row (w) | |
8900 | struct window *w; | |
8901 | { | |
8902 | int first_changed_pos = BEG + beg_unchanged; | |
8903 | struct glyph_row *row; | |
8904 | struct glyph_row *row_found = NULL; | |
8905 | int yb = window_text_bottom_y (w); | |
8906 | ||
8907 | /* Find the last row displaying unchanged text. */ | |
8908 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8909 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
8910 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 8911 | { |
5f5c8ee5 GM |
8912 | if (/* If row ends before first_changed_pos, it is unchanged, |
8913 | except in some case. */ | |
8914 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
8915 | /* When row ends in ZV and we write at ZV it is not | |
8916 | unchanged. */ | |
8917 | && !row->ends_at_zv_p | |
8918 | /* When first_changed_pos is the end of a continued line, | |
8919 | row is not unchanged because it may be no longer | |
8920 | continued. */ | |
8921 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
8922 | && row->continued_p)) | |
8923 | row_found = row; | |
8924 | ||
8925 | /* Stop if last visible row. */ | |
8926 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
8927 | break; | |
8928 | ||
8929 | ++row; | |
a2889657 JB |
8930 | } |
8931 | ||
5f5c8ee5 | 8932 | return row_found; |
a2889657 | 8933 | } |
5f5c8ee5 GM |
8934 | |
8935 | ||
8936 | /* Find the first glyph row in the current matrix of W that is not | |
8937 | affected by changes at the end of current_buffer since the last | |
8938 | time the window was redisplayed. Return in *DELTA the number of | |
8939 | bytes by which buffer positions in unchanged text at the end of | |
8940 | current_buffer must be adjusted. Value is null if no such row | |
8941 | exists, i.e. all rows are affected by changes. | |
8942 | ||
8943 | The global variable end_unchanged is assumed to contain the number | |
8944 | of unchanged bytes at the end of current_buffer. The buffer | |
8945 | position of the last changed byte in current_buffer is then Z - | |
8946 | end_unchanged. */ | |
8947 | ||
8948 | static struct glyph_row * | |
8949 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
8950 | struct window *w; | |
8951 | int *delta, *delta_bytes; | |
a2889657 | 8952 | { |
5f5c8ee5 GM |
8953 | struct glyph_row *row; |
8954 | struct glyph_row *row_found = NULL; | |
c581d710 | 8955 | |
5f5c8ee5 | 8956 | *delta = *delta_bytes = 0; |
b2a76982 | 8957 | |
5f5c8ee5 GM |
8958 | /* A value of window_end_pos >= end_unchanged means that the window |
8959 | end is in the range of changed text. If so, there is no | |
8960 | unchanged row at the end of W's current matrix. */ | |
8961 | xassert (!NILP (w->window_end_valid)); | |
8962 | if (XFASTINT (w->window_end_pos) >= end_unchanged) | |
8963 | return NULL; | |
8964 | ||
8965 | /* Set row to the last row in W's current matrix displaying text. */ | |
8966 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
8967 | ||
8968 | /* End vpos should always be on text, except in an entirely empty | |
8969 | matrix. */ | |
8970 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
8971 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0); | |
8972 | ||
8973 | /* If matrix is entirely empty, no unchanged row exists. */ | |
8974 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8975 | { | |
8976 | /* The value of row is the last glyph row in the matrix having a | |
8977 | meaningful buffer position in it. The end position of row | |
8978 | corresponds to window_end_pos. This allows us to translate | |
8979 | buffer positions in the current matrix to current buffer | |
8980 | positions for characters not in changed text. */ | |
8981 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
8982 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
8983 | int last_unchanged_pos, last_unchanged_pos_old; | |
8984 | struct glyph_row *first_text_row | |
8985 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8986 | ||
8987 | *delta = Z - Z_old; | |
8988 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
8989 | ||
8990 | /* Set last_unchanged_pos to the buffer position of the last | |
8991 | character in the buffer that has not been changed. Z is the | |
8992 | index + 1 of the last byte in current_buffer, i.e. by | |
8993 | subtracting end_unchanged we get the index of the last | |
8994 | unchanged character, and we have to add BEG to get its buffer | |
8995 | position. */ | |
8996 | last_unchanged_pos = Z - end_unchanged + BEG; | |
8997 | last_unchanged_pos_old = last_unchanged_pos - *delta; | |
8998 | ||
8999 | /* Search backward from ROW for a row displaying a line that | |
9000 | starts at a minimum position >= last_unchanged_pos_old. */ | |
9001 | while (row >= first_text_row) | |
9002 | { | |
9003 | xassert (row->enabled_p); | |
9004 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9005 | ||
9006 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
9007 | row_found = row; | |
9008 | --row; | |
9009 | } | |
9010 | } | |
9011 | ||
9012 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
9013 | return row_found; | |
c581d710 RS |
9014 | } |
9015 | ||
c581d710 | 9016 | |
5f5c8ee5 GM |
9017 | /* Make sure that glyph rows in the current matrix of window W |
9018 | reference the same glyph memory as corresponding rows in the | |
9019 | frame's frame matrix. This function is called after scrolling W's | |
9020 | current matrix on a terminal frame in try_window_id and | |
9021 | try_window_reusing_current_matrix. */ | |
9022 | ||
9023 | static void | |
9024 | sync_frame_with_window_matrix_rows (w) | |
9025 | struct window *w; | |
c581d710 | 9026 | { |
5f5c8ee5 GM |
9027 | struct frame *f = XFRAME (w->frame); |
9028 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
9029 | ||
9030 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
9031 | must have a frame matrix. */ | |
9032 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
9033 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
9034 | xassert (!FRAME_WINDOW_P (f)); | |
9035 | ||
9036 | /* If W is a full-width window, glyph pointers in W's current matrix | |
9037 | have, by definition, to be the same as glyph pointers in the | |
9038 | corresponding frame matrix. */ | |
9039 | window_row = w->current_matrix->rows; | |
9040 | window_row_end = window_row + w->current_matrix->nrows; | |
9041 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
9042 | while (window_row < window_row_end) | |
659a218f | 9043 | { |
5f5c8ee5 GM |
9044 | int area; |
9045 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) | |
9046 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
9047 | ++window_row, ++frame_row; | |
659a218f | 9048 | } |
a2889657 | 9049 | } |
5f5c8ee5 GM |
9050 | |
9051 | ||
9052 | /* Try to redisplay window W by reusing its existing display. W's | |
9053 | current matrix must be up to date when this function is called, | |
9054 | i.e. window_end_valid must not be nil. | |
9055 | ||
9056 | Value is | |
9057 | ||
9058 | 1 if display has been updated | |
9059 | 0 if otherwise unsuccessful | |
9060 | -1 if redisplay with same window start is known not to succeed | |
9061 | ||
9062 | The following steps are performed: | |
9063 | ||
9064 | 1. Find the last row in the current matrix of W that is not | |
9065 | affected by changes at the start of current_buffer. If no such row | |
9066 | is found, give up. | |
9067 | ||
9068 | 2. Find the first row in W's current matrix that is not affected by | |
9069 | changes at the end of current_buffer. Maybe there is no such row. | |
9070 | ||
9071 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
9072 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
9073 | the window. | |
9074 | ||
9075 | 4. If cursor is not known to appear on the window, give up. | |
9076 | ||
9077 | 5. If display stopped at the row found in step 2, scroll the | |
9078 | display and current matrix as needed. | |
9079 | ||
9080 | 6. Maybe display some lines at the end of W, if we must. This can | |
9081 | happen under various circumstances, like a partially visible line | |
9082 | becoming fully visible, or because newly displayed lines are displayed | |
9083 | in smaller font sizes. | |
9084 | ||
9085 | 7. Update W's window end information. */ | |
9086 | ||
9087 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
9088 | |
9089 | static int | |
5f5c8ee5 | 9090 | try_window_id (w) |
12adba34 | 9091 | struct window *w; |
12adba34 | 9092 | { |
5f5c8ee5 GM |
9093 | struct frame *f = XFRAME (w->frame); |
9094 | struct glyph_matrix *current_matrix = w->current_matrix; | |
9095 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
9096 | struct glyph_row *last_unchanged_at_beg_row; | |
9097 | struct glyph_row *first_unchanged_at_end_row; | |
9098 | struct glyph_row *row; | |
9099 | struct glyph_row *bottom_row; | |
9100 | int bottom_vpos; | |
9101 | struct it it; | |
9102 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
9103 | struct text_pos start_pos; | |
9104 | struct run run; | |
9105 | int first_unchanged_at_end_vpos = 0; | |
9106 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
9107 | struct text_pos start; | |
9108 | ||
9109 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
9110 | ||
9111 | /* Check pre-conditions. Window end must be valid, otherwise | |
9112 | the current matrix would not be up to date. */ | |
9113 | xassert (!NILP (w->window_end_valid)); | |
9114 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
9115 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
9116 | ||
9117 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
9118 | only if buffer has really changed. The reason is that the gap is | |
9119 | initially at Z for freshly visited files. The code below would | |
9120 | set end_unchanged to 0 in that case. */ | |
9121 | if (MODIFF > SAVE_MODIFF) | |
9122 | { | |
9123 | if (GPT - BEG < beg_unchanged) | |
9124 | beg_unchanged = GPT - BEG; | |
9125 | if (Z - GPT < end_unchanged) | |
9126 | end_unchanged = Z - GPT; | |
9127 | } | |
9128 | ||
9129 | /* If window starts after a line end, and the last change is in | |
9130 | front of that newline, then changes don't affect the display. | |
9131 | This case happens with stealth-fontification. */ | |
9132 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9133 | if (CHARPOS (start) > BEGV | |
9134 | && Z - end_unchanged < CHARPOS (start) - 1 | |
9135 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' | |
9136 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9137 | { | |
9138 | /* We have to update window end positions because the buffer's | |
9139 | size has changed. */ | |
9140 | w->window_end_pos | |
9141 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9142 | w->window_end_bytepos | |
9143 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9144 | return 1; | |
9145 | } | |
9146 | ||
9147 | /* Return quickly if changes are all below what is displayed in the | |
9148 | window, and if PT is in the window. */ | |
9149 | if (beg_unchanged > MATRIX_ROW_END_CHARPOS (row) | |
9150 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9151 | { | |
9152 | /* We have to update window end positions because the buffer's | |
9153 | size has changed. */ | |
9154 | w->window_end_pos | |
9155 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9156 | w->window_end_bytepos | |
9157 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9158 | return 1; | |
9159 | } | |
9160 | ||
9161 | /* Check that window start agrees with the start of the first glyph | |
9162 | row in its current matrix. Check this after we know the window | |
9163 | start is not in changed text, otherwise positions would not be | |
9164 | comparable. */ | |
9165 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9166 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
9167 | return 0; | |
9168 | ||
9169 | /* Remember beg_unchanged and end_unchanged for debugging purposes. */ | |
9170 | IF_DEBUG (debug_beg_unchanged = beg_unchanged; | |
9171 | debug_end_unchanged = end_unchanged); | |
9172 | ||
9173 | /* Compute the position at which we have to start displaying new | |
9174 | lines. Some of the lines at the top of the window might be | |
9175 | reusable because they are not displaying changed text. Find the | |
9176 | last row in W's current matrix not affected by changes at the | |
9177 | start of current_buffer. Value is null if changes start in the | |
9178 | first line of window. */ | |
9179 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
9180 | if (last_unchanged_at_beg_row) | |
9181 | { | |
9182 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
9183 | start_pos = it.current.pos; | |
9184 | ||
9185 | /* Start displaying new lines in the desired matrix at the same | |
9186 | vpos we would use in the current matrix, i.e. below | |
9187 | last_unchanged_at_beg_row. */ | |
9188 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
9189 | current_matrix); | |
9190 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
9191 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
9192 | ||
9193 | xassert (it.hpos == 0 && it.current_x == 0); | |
9194 | } | |
9195 | else | |
9196 | { | |
9197 | /* There are no reusable lines at the start of the window. | |
9198 | Start displaying in the first line. */ | |
9199 | start_display (&it, w, start); | |
9200 | start_pos = it.current.pos; | |
9201 | } | |
9202 | ||
9203 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
9204 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
9205 | ||
9206 | /* Find the first row that is not affected by changes at the end of | |
9207 | the buffer. Value will be null if there is no unchanged row, in | |
9208 | which case we must redisplay to the end of the window. delta | |
9209 | will be set to the value by which buffer positions beginning with | |
9210 | first_unchanged_at_end_row have to be adjusted due to text | |
9211 | changes. */ | |
9212 | first_unchanged_at_end_row | |
9213 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
9214 | IF_DEBUG (debug_delta = delta); | |
9215 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
9216 | ||
9217 | /* Set stop_pos to the buffer position up to which we will have to | |
9218 | display new lines. If first_unchanged_at_end_row != NULL, this | |
9219 | is the buffer position of the start of the line displayed in that | |
9220 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
9221 | that we don't stop at a buffer position. */ | |
9222 | stop_pos = 0; | |
9223 | if (first_unchanged_at_end_row) | |
9224 | { | |
9225 | xassert (last_unchanged_at_beg_row == NULL | |
9226 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
9227 | ||
9228 | /* If this is a continuation line, move forward to the next one | |
9229 | that isn't. Changes in lines above affect this line. | |
9230 | Caution: this may move first_unchanged_at_end_row to a row | |
9231 | not displaying text. */ | |
9232 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
9233 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9234 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9235 | < it.last_visible_y)) | |
9236 | ++first_unchanged_at_end_row; | |
9237 | ||
9238 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9239 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9240 | >= it.last_visible_y)) | |
9241 | first_unchanged_at_end_row = NULL; | |
9242 | else | |
9243 | { | |
9244 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
9245 | + delta); | |
9246 | first_unchanged_at_end_vpos | |
9247 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9248 | xassert (stop_pos >= Z - end_unchanged); | |
9249 | } | |
9250 | } | |
9251 | else if (last_unchanged_at_beg_row == NULL) | |
9252 | return 0; | |
9253 | ||
9254 | ||
9255 | #if GLYPH_DEBUG | |
9256 | ||
9257 | /* Either there is no unchanged row at the end, or the one we have | |
9258 | now displays text. This is a necessary condition for the window | |
9259 | end pos calculation at the end of this function. */ | |
9260 | xassert (first_unchanged_at_end_row == NULL | |
9261 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
9262 | ||
9263 | debug_last_unchanged_at_beg_vpos | |
9264 | = (last_unchanged_at_beg_row | |
9265 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
9266 | : -1); | |
9267 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
9268 | ||
9269 | #endif /* GLYPH_DEBUG != 0 */ | |
9270 | ||
9271 | ||
9272 | /* Display new lines. Set last_text_row to the last new line | |
9273 | displayed which has text on it, i.e. might end up as being the | |
9274 | line where the window_end_vpos is. */ | |
9275 | w->cursor.vpos = -1; | |
9276 | last_text_row = NULL; | |
9277 | overlay_arrow_seen = 0; | |
9278 | while (it.current_y < it.last_visible_y | |
9279 | && !fonts_changed_p | |
9280 | && (first_unchanged_at_end_row == NULL | |
9281 | || IT_CHARPOS (it) < stop_pos)) | |
9282 | { | |
9283 | if (display_line (&it)) | |
9284 | last_text_row = it.glyph_row - 1; | |
9285 | } | |
9286 | ||
9287 | if (fonts_changed_p) | |
9288 | return -1; | |
9289 | ||
9290 | ||
9291 | /* Compute differences in buffer positions, y-positions etc. for | |
9292 | lines reused at the bottom of the window. Compute what we can | |
9293 | scroll. */ | |
9294 | if (first_unchanged_at_end_row) | |
9295 | { | |
9296 | dvpos = (it.vpos | |
9297 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
9298 | current_matrix)); | |
9299 | dy = it.current_y - first_unchanged_at_end_row->y; | |
9300 | run.current_y = first_unchanged_at_end_row->y; | |
9301 | run.desired_y = run.current_y + dy; | |
9302 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
9303 | } | |
9304 | else | |
9305 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
9306 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); | |
9307 | ||
9308 | ||
9309 | /* Find the cursor if not already found. We have to decide whether | |
9310 | PT will appear on this window (it sometimes doesn't, but this is | |
9311 | not a very frequent case.) This decision has to be made before | |
9312 | the current matrix is altered. A value of cursor.vpos < 0 means | |
9313 | that PT is either in one of the lines beginning at | |
9314 | first_unchanged_at_end_row or below the window. Don't care for | |
9315 | lines that might be displayed later at the window end; as | |
9316 | mentioned, this is not a frequent case. */ | |
9317 | if (w->cursor.vpos < 0) | |
9318 | { | |
9319 | int last_y = min (it.last_visible_y, it.last_visible_y + dy); | |
9320 | ||
9321 | /* Cursor in unchanged rows at the top? */ | |
9322 | if (PT < CHARPOS (start_pos) | |
9323 | && last_unchanged_at_beg_row) | |
9324 | { | |
9325 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9326 | while (row <= last_unchanged_at_beg_row | |
9327 | && MATRIX_ROW_END_CHARPOS (row) <= PT) | |
9328 | ++row; | |
9329 | xassert (row <= last_unchanged_at_beg_row); | |
9330 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
9331 | } | |
9332 | ||
9333 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
9334 | else if (first_unchanged_at_end_row) | |
9335 | { | |
9336 | row = first_unchanged_at_end_row; | |
9337 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9338 | { | |
9339 | if (PT - delta >= MATRIX_ROW_START_CHARPOS (row) | |
9340 | && PT - delta < MATRIX_ROW_END_CHARPOS (row)) | |
9341 | { | |
9342 | set_cursor_from_row (w, row, w->current_matrix, delta, | |
9343 | delta_bytes, dy, dvpos); | |
9344 | break; | |
9345 | } | |
9346 | else if (MATRIX_ROW_BOTTOM_Y (row) >= last_y) | |
9347 | break; | |
9348 | ++row; | |
9349 | } | |
9350 | } | |
9351 | ||
9352 | /* Give up if cursor was not found. */ | |
9353 | if (w->cursor.vpos < 0) | |
9354 | { | |
9355 | clear_glyph_matrix (w->desired_matrix); | |
9356 | return -1; | |
9357 | } | |
9358 | } | |
9359 | ||
9360 | /* Don't let the cursor end in the scroll margins. */ | |
9361 | { | |
9362 | int this_scroll_margin, cursor_height; | |
9363 | ||
9364 | this_scroll_margin = max (0, scroll_margin); | |
9365 | this_scroll_margin = min (this_scroll_margin, | |
9366 | XFASTINT (w->height) / 4); | |
9367 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
9368 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
9369 | ||
9370 | if ((w->cursor.y < this_scroll_margin | |
9371 | && CHARPOS (start) > BEGV) | |
9372 | /* Don't take scroll margin into account at the bottom because | |
9373 | old redisplay didn't do it either. */ | |
9374 | || w->cursor.y + cursor_height > it.last_visible_y) | |
9375 | { | |
9376 | w->cursor.vpos = -1; | |
9377 | clear_glyph_matrix (w->desired_matrix); | |
9378 | return -1; | |
9379 | } | |
9380 | } | |
9381 | ||
9382 | /* Scroll the display. Do it before changing the current matrix so | |
9383 | that xterm.c doesn't get confused about where the cursor glyph is | |
9384 | found. */ | |
9385 | if (dy) | |
9386 | { | |
9387 | update_begin (f); | |
9388 | ||
9389 | if (FRAME_WINDOW_P (f)) | |
9390 | { | |
9391 | rif->update_window_begin_hook (w); | |
9392 | rif->scroll_run_hook (w, &run); | |
9393 | rif->update_window_end_hook (w, 0); | |
9394 | } | |
9395 | else | |
9396 | { | |
9397 | /* Terminal frame. In this case, dvpos gives the number of | |
9398 | lines to scroll by; dvpos < 0 means scroll up. */ | |
9399 | int first_unchanged_at_end_vpos | |
9400 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
9401 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
9402 | int end = XFASTINT (w->top) + window_internal_height (w); | |
9403 | ||
9404 | /* Perform the operation on the screen. */ | |
9405 | if (dvpos > 0) | |
9406 | { | |
9407 | /* Scroll last_unchanged_at_beg_row to the end of the | |
9408 | window down dvpos lines. */ | |
9409 | set_terminal_window (end); | |
9410 | ||
9411 | /* On dumb terminals delete dvpos lines at the end | |
9412 | before inserting dvpos empty lines. */ | |
9413 | if (!scroll_region_ok) | |
9414 | ins_del_lines (end - dvpos, -dvpos); | |
9415 | ||
9416 | /* Insert dvpos empty lines in front of | |
9417 | last_unchanged_at_beg_row. */ | |
9418 | ins_del_lines (from, dvpos); | |
9419 | } | |
9420 | else if (dvpos < 0) | |
9421 | { | |
9422 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
9423 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
9424 | set_terminal_window (end); | |
9425 | ||
9426 | /* Delete dvpos lines in front of | |
9427 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
9428 | the cursor to the given vpos and emit |dvpos| delete | |
9429 | line sequences. */ | |
9430 | ins_del_lines (from + dvpos, dvpos); | |
9431 | ||
9432 | /* On a dumb terminal insert dvpos empty lines at the | |
9433 | end. */ | |
9434 | if (!scroll_region_ok) | |
9435 | ins_del_lines (end + dvpos, -dvpos); | |
9436 | } | |
9437 | ||
9438 | set_terminal_window (0); | |
9439 | } | |
9440 | ||
9441 | update_end (f); | |
9442 | } | |
9443 | ||
9444 | /* Shift reused rows of the current matrix to the right position. */ | |
9445 | if (dvpos < 0) | |
9446 | { | |
9447 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
9448 | bottom_vpos, dvpos); | |
9449 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
9450 | bottom_vpos, 0); | |
9451 | } | |
9452 | else if (dvpos > 0) | |
9453 | { | |
9454 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
9455 | bottom_vpos, dvpos); | |
9456 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
9457 | first_unchanged_at_end_vpos + dvpos, 0); | |
9458 | } | |
9459 | ||
9460 | /* For frame-based redisplay, make sure that current frame and window | |
9461 | matrix are in sync with respect to glyph memory. */ | |
9462 | if (!FRAME_WINDOW_P (f)) | |
9463 | sync_frame_with_window_matrix_rows (w); | |
9464 | ||
9465 | /* Adjust buffer positions in reused rows. */ | |
9466 | if (delta) | |
9467 | increment_glyph_matrix_buffer_positions (current_matrix, | |
9468 | first_unchanged_at_end_vpos + dvpos, | |
9469 | bottom_vpos, delta, delta_bytes); | |
9470 | ||
9471 | /* Adjust Y positions. */ | |
9472 | if (dy) | |
9473 | shift_glyph_matrix (w, current_matrix, | |
9474 | first_unchanged_at_end_vpos + dvpos, | |
9475 | bottom_vpos, dy); | |
9476 | ||
9477 | if (first_unchanged_at_end_row) | |
9478 | first_unchanged_at_end_row += dvpos; | |
9479 | ||
9480 | /* If scrolling up, there may be some lines to display at the end of | |
9481 | the window. */ | |
9482 | last_text_row_at_end = NULL; | |
9483 | if (dy < 0) | |
9484 | { | |
9485 | /* Set last_row to the glyph row in the current matrix where the | |
9486 | window end line is found. It has been moved up or down in | |
9487 | the matrix by dvpos. */ | |
9488 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
9489 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
9490 | ||
9491 | /* If last_row is the window end line, it should display text. */ | |
9492 | xassert (last_row->displays_text_p); | |
9493 | ||
9494 | /* If window end line was partially visible before, begin | |
9495 | displaying at that line. Otherwise begin displaying with the | |
9496 | line following it. */ | |
9497 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
9498 | { | |
9499 | init_to_row_start (&it, w, last_row); | |
9500 | it.vpos = last_vpos; | |
9501 | it.current_y = last_row->y; | |
9502 | } | |
9503 | else | |
9504 | { | |
9505 | init_to_row_end (&it, w, last_row); | |
9506 | it.vpos = 1 + last_vpos; | |
9507 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
9508 | ++last_row; | |
9509 | } | |
12adba34 | 9510 | |
5f5c8ee5 GM |
9511 | /* We may start in a continuation line. If so, we have to get |
9512 | the right continuation_lines_width and current_x. */ | |
9513 | it.continuation_lines_width = last_row->continuation_lines_width; | |
9514 | it.hpos = it.current_x = 0; | |
9515 | ||
9516 | /* Display the rest of the lines at the window end. */ | |
9517 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
9518 | while (it.current_y < it.last_visible_y | |
9519 | && !fonts_changed_p) | |
9520 | { | |
9521 | /* Is it always sure that the display agrees with lines in | |
9522 | the current matrix? I don't think so, so we mark rows | |
9523 | displayed invalid in the current matrix by setting their | |
9524 | enabled_p flag to zero. */ | |
9525 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
9526 | if (display_line (&it)) | |
9527 | last_text_row_at_end = it.glyph_row - 1; | |
9528 | } | |
9529 | } | |
12adba34 | 9530 | |
5f5c8ee5 GM |
9531 | /* Update window_end_pos and window_end_vpos. */ |
9532 | if (first_unchanged_at_end_row | |
9533 | && first_unchanged_at_end_row->y < it.last_visible_y | |
9534 | && !last_text_row_at_end) | |
9535 | { | |
9536 | /* Window end line if one of the preserved rows from the current | |
9537 | matrix. Set row to the last row displaying text in current | |
9538 | matrix starting at first_unchanged_at_end_row, after | |
9539 | scrolling. */ | |
9540 | xassert (first_unchanged_at_end_row->displays_text_p); | |
9541 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
9542 | first_unchanged_at_end_row); | |
9543 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9544 | ||
9545 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
9546 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
9547 | XSETFASTINT (w->window_end_vpos, | |
9548 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
9549 | } | |
9550 | else if (last_text_row_at_end) | |
9551 | { | |
9552 | XSETFASTINT (w->window_end_pos, | |
9553 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
9554 | w->window_end_bytepos | |
9555 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
9556 | XSETFASTINT (w->window_end_vpos, | |
9557 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
9558 | } | |
9559 | else if (last_text_row) | |
9560 | { | |
9561 | /* We have displayed either to the end of the window or at the | |
9562 | end of the window, i.e. the last row with text is to be found | |
9563 | in the desired matrix. */ | |
9564 | XSETFASTINT (w->window_end_pos, | |
9565 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9566 | w->window_end_bytepos | |
9567 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9568 | XSETFASTINT (w->window_end_vpos, | |
9569 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
9570 | } | |
9571 | else if (first_unchanged_at_end_row == NULL | |
9572 | && last_text_row == NULL | |
9573 | && last_text_row_at_end == NULL) | |
9574 | { | |
9575 | /* Displayed to end of window, but no line containing text was | |
9576 | displayed. Lines were deleted at the end of the window. */ | |
9577 | int vpos; | |
9578 | int top_line_p = WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0; | |
9579 | ||
9580 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
9581 | if ((w->desired_matrix->rows[vpos + top_line_p].enabled_p | |
9582 | && w->desired_matrix->rows[vpos + top_line_p].displays_text_p) | |
9583 | || (!w->desired_matrix->rows[vpos + top_line_p].enabled_p | |
9584 | && w->current_matrix->rows[vpos + top_line_p].displays_text_p)) | |
9585 | break; | |
12adba34 | 9586 | |
5f5c8ee5 GM |
9587 | w->window_end_vpos = make_number (vpos); |
9588 | } | |
9589 | else | |
9590 | abort (); | |
9591 | ||
9592 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
9593 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 9594 | |
5f5c8ee5 GM |
9595 | /* Record that display has not been completed. */ |
9596 | w->window_end_valid = Qnil; | |
9597 | w->desired_matrix->no_scrolling_p = 1; | |
9598 | return 1; | |
12adba34 | 9599 | } |
0f9c0ff0 | 9600 | |
a2889657 | 9601 | |
5f5c8ee5 GM |
9602 | \f |
9603 | /*********************************************************************** | |
9604 | More debugging support | |
9605 | ***********************************************************************/ | |
a2889657 | 9606 | |
5f5c8ee5 | 9607 | #if GLYPH_DEBUG |
a2889657 | 9608 | |
5f5c8ee5 GM |
9609 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
9610 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 9611 | |
31b24551 | 9612 | |
5f5c8ee5 GM |
9613 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
9614 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 9615 | |
5f5c8ee5 GM |
9616 | void |
9617 | dump_glyph_matrix (matrix, with_glyphs_p) | |
9618 | struct glyph_matrix *matrix; | |
9619 | int with_glyphs_p; | |
9620 | { | |
efc63ef0 | 9621 | int i; |
5f5c8ee5 GM |
9622 | for (i = 0; i < matrix->nrows; ++i) |
9623 | dump_glyph_row (matrix, i, with_glyphs_p); | |
9624 | } | |
31b24551 | 9625 | |
68a37fa8 | 9626 | |
5f5c8ee5 GM |
9627 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9628 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 9629 | |
5f5c8ee5 GM |
9630 | void |
9631 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
9632 | struct glyph_matrix *matrix; | |
9633 | int vpos, with_glyphs_p; | |
9634 | { | |
9635 | struct glyph_row *row; | |
9636 | ||
9637 | if (vpos < 0 || vpos >= matrix->nrows) | |
9638 | return; | |
9639 | ||
9640 | row = MATRIX_ROW (matrix, vpos); | |
9641 | ||
9642 | fprintf (stderr, "Row Start End Used oEI><O\\CTZF X Y W\n"); | |
9643 | fprintf (stderr, "=============================================\n"); | |
9644 | ||
9645 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d\n", | |
9646 | row - matrix->rows, | |
9647 | MATRIX_ROW_START_CHARPOS (row), | |
9648 | MATRIX_ROW_END_CHARPOS (row), | |
9649 | row->used[TEXT_AREA], | |
9650 | row->contains_overlapping_glyphs_p, | |
9651 | row->enabled_p, | |
9652 | row->inverse_p, | |
9653 | row->truncated_on_left_p, | |
9654 | row->truncated_on_right_p, | |
9655 | row->overlay_arrow_p, | |
9656 | row->continued_p, | |
9657 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
9658 | row->displays_text_p, | |
9659 | row->ends_at_zv_p, | |
9660 | row->fill_line_p, | |
9661 | row->x, | |
9662 | row->y, | |
9663 | row->pixel_width); | |
9664 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, | |
9665 | row->end.overlay_string_index); | |
9666 | fprintf (stderr, "%9d %5d\n", | |
9667 | CHARPOS (row->start.string_pos), | |
9668 | CHARPOS (row->end.string_pos)); | |
9669 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
9670 | row->end.dpvec_index); | |
9671 | ||
9672 | if (with_glyphs_p) | |
bd66d1ba | 9673 | { |
5f5c8ee5 GM |
9674 | struct glyph *glyph, *glyph_end; |
9675 | int prev_had_glyphs_p; | |
9676 | ||
9677 | glyph = row->glyphs[TEXT_AREA]; | |
9678 | glyph_end = glyph + row->used[TEXT_AREA]; | |
9679 | ||
9680 | /* Glyph for a line end in text. */ | |
9681 | if (glyph == glyph_end && glyph->charpos > 0) | |
9682 | ++glyph_end; | |
9683 | ||
9684 | if (glyph < glyph_end) | |
bd66d1ba | 9685 | { |
5f5c8ee5 GM |
9686 | fprintf (stderr, " Glyph Type Pos W Code C Face LR\n"); |
9687 | prev_had_glyphs_p = 1; | |
bd66d1ba RS |
9688 | } |
9689 | else | |
5f5c8ee5 GM |
9690 | prev_had_glyphs_p = 0; |
9691 | ||
9692 | while (glyph < glyph_end) | |
f7b4b63a | 9693 | { |
5f5c8ee5 GM |
9694 | if (glyph->type == CHAR_GLYPH) |
9695 | { | |
9696 | fprintf (stderr, | |
9697 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
9698 | glyph - row->glyphs[TEXT_AREA], | |
9699 | 'C', | |
9700 | glyph->charpos, | |
9701 | glyph->pixel_width, | |
9702 | glyph->u.ch.code, | |
9703 | (glyph->u.ch.code < 0x80 && glyph->u.ch.code >= ' ' | |
9704 | ? glyph->u.ch.code | |
9705 | : '.'), | |
9706 | glyph->u.ch.face_id, | |
9707 | glyph->left_box_line_p, | |
9708 | glyph->right_box_line_p); | |
9709 | } | |
9710 | else if (glyph->type == STRETCH_GLYPH) | |
9711 | { | |
9712 | fprintf (stderr, | |
9713 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
9714 | glyph - row->glyphs[TEXT_AREA], | |
9715 | 'S', | |
9716 | glyph->charpos, | |
9717 | glyph->pixel_width, | |
9718 | 0, | |
9719 | '.', | |
9720 | glyph->u.stretch.face_id, | |
9721 | glyph->left_box_line_p, | |
9722 | glyph->right_box_line_p); | |
9723 | } | |
9724 | else if (glyph->type == IMAGE_GLYPH) | |
9725 | { | |
9726 | fprintf (stderr, | |
9727 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
9728 | glyph - row->glyphs[TEXT_AREA], | |
9729 | 'I', | |
9730 | glyph->charpos, | |
9731 | glyph->pixel_width, | |
9732 | glyph->u.img.id, | |
9733 | '.', | |
9734 | glyph->u.img.face_id, | |
9735 | glyph->left_box_line_p, | |
9736 | glyph->right_box_line_p); | |
9737 | } | |
9738 | ++glyph; | |
f7b4b63a | 9739 | } |
f4faa47c | 9740 | } |
5f5c8ee5 | 9741 | } |
f4faa47c | 9742 | |
a2889657 | 9743 | |
5f5c8ee5 GM |
9744 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
9745 | Sdump_glyph_matrix, 0, 1, "p", | |
9746 | "Dump the current matrix of the selected window to stderr.\n\ | |
9747 | Shows contents of glyph row structures. With non-nil optional\n\ | |
9748 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
9749 | (with_glyphs_p) | |
9750 | { | |
9751 | struct window *w = XWINDOW (selected_window); | |
9752 | struct buffer *buffer = XBUFFER (w->buffer); | |
9753 | ||
9754 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
9755 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
9756 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
9757 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
9758 | fprintf (stderr, "=============================================\n"); | |
9759 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
9760 | return Qnil; | |
9761 | } | |
1c2250c2 | 9762 | |
1fca3fae | 9763 | |
5f5c8ee5 GM |
9764 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
9765 | "Dump glyph row ROW to stderr.") | |
9766 | (row) | |
9767 | Lisp_Object row; | |
9768 | { | |
9769 | CHECK_NUMBER (row, 0); | |
9770 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
9771 | return Qnil; | |
9772 | } | |
1fca3fae | 9773 | |
67481ae5 | 9774 | |
5f5c8ee5 GM |
9775 | DEFUN ("dump-toolbar-row", Fdump_toolbar_row, Sdump_toolbar_row, |
9776 | 0, 0, "", "") | |
9777 | () | |
9778 | { | |
9779 | struct glyph_matrix *m = (XWINDOW (selected_frame->toolbar_window) | |
9780 | ->current_matrix); | |
9781 | dump_glyph_row (m, 0, 1); | |
9782 | return Qnil; | |
9783 | } | |
ca26e1c8 | 9784 | |
0f9c0ff0 | 9785 | |
5f5c8ee5 GM |
9786 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
9787 | Strace_redisplay_toggle, 0, 0, "", | |
9788 | "Toggle tracing of redisplay.") | |
9789 | () | |
9790 | { | |
9791 | trace_redisplay_p = !trace_redisplay_p; | |
9792 | return Qnil; | |
9793 | } | |
9794 | ||
9795 | ||
9796 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 9797 | |
ca26e1c8 | 9798 | |
5f5c8ee5 GM |
9799 | \f |
9800 | /*********************************************************************** | |
9801 | Building Desired Matrix Rows | |
9802 | ***********************************************************************/ | |
a2889657 | 9803 | |
5f5c8ee5 GM |
9804 | /* Return a temporary glyph row holding the glyphs of an overlay |
9805 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 9806 | |
5f5c8ee5 GM |
9807 | static struct glyph_row * |
9808 | get_overlay_arrow_glyph_row (w) | |
9809 | struct window *w; | |
9810 | { | |
9811 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
9812 | struct buffer *buffer = XBUFFER (w->buffer); | |
9813 | struct buffer *old = current_buffer; | |
9814 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
9815 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
9816 | unsigned char *arrow_end = arrow_string + arrow_len; | |
9817 | unsigned char *p; | |
9818 | struct it it; | |
9819 | int multibyte_p; | |
9820 | int n_glyphs_before; | |
9821 | ||
9822 | set_buffer_temp (buffer); | |
9823 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
9824 | it.glyph_row->used[TEXT_AREA] = 0; | |
9825 | SET_TEXT_POS (it.position, 0, 0); | |
9826 | ||
9827 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
9828 | p = arrow_string; | |
9829 | while (p < arrow_end) | |
9830 | { | |
9831 | Lisp_Object face, ilisp; | |
9832 | ||
9833 | /* Get the next character. */ | |
9834 | if (multibyte_p) | |
4fdb80f2 | 9835 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
9836 | else |
9837 | it.c = *p, it.len = 1; | |
9838 | p += it.len; | |
9839 | ||
9840 | /* Get its face. */ | |
9841 | XSETFASTINT (ilisp, p - arrow_string); | |
9842 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
9843 | it.face_id = compute_char_face (f, it.c, face); | |
9844 | ||
9845 | /* Compute its width, get its glyphs. */ | |
9846 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 9847 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
9848 | PRODUCE_GLYPHS (&it); |
9849 | ||
9850 | /* If this character doesn't fit any more in the line, we have | |
9851 | to remove some glyphs. */ | |
9852 | if (it.current_x > it.last_visible_x) | |
9853 | { | |
9854 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
9855 | break; | |
9856 | } | |
9857 | } | |
9858 | ||
9859 | set_buffer_temp (old); | |
9860 | return it.glyph_row; | |
9861 | } | |
ca26e1c8 | 9862 | |
b0a0fbda | 9863 | |
5f5c8ee5 GM |
9864 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
9865 | glyphs are only inserted for terminal frames since we can't really | |
9866 | win with truncation glyphs when partially visible glyphs are | |
9867 | involved. Which glyphs to insert is determined by | |
9868 | produce_special_glyphs. */ | |
67481ae5 | 9869 | |
5f5c8ee5 GM |
9870 | static void |
9871 | insert_left_trunc_glyphs (it) | |
9872 | struct it *it; | |
9873 | { | |
9874 | struct it truncate_it; | |
9875 | struct glyph *from, *end, *to, *toend; | |
9876 | ||
9877 | xassert (!FRAME_WINDOW_P (it->f)); | |
9878 | ||
9879 | /* Get the truncation glyphs. */ | |
9880 | truncate_it = *it; | |
9881 | truncate_it.charset = -1; | |
9882 | truncate_it.current_x = 0; | |
9883 | truncate_it.face_id = DEFAULT_FACE_ID; | |
9884 | truncate_it.glyph_row = &scratch_glyph_row; | |
9885 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
9886 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
9887 | truncate_it.object = 0; | |
9888 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); | |
9889 | ||
9890 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
9891 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
9892 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
9893 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
9894 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
9895 | ||
9896 | while (from < end) | |
9897 | *to++ = *from++; | |
9898 | ||
9899 | /* There may be padding glyphs left over. Remove them. */ | |
9900 | from = to; | |
9901 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
9902 | ++from; | |
9903 | while (from < toend) | |
9904 | *to++ = *from++; | |
9905 | ||
9906 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
9907 | } | |
e0bfbde6 | 9908 | |
e0bfbde6 | 9909 | |
5f5c8ee5 | 9910 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 9911 | |
5f5c8ee5 GM |
9912 | Most of the time, ascent and height of a display line will be equal |
9913 | to the max_ascent and max_height values of the display iterator | |
9914 | structure. This is not the case if | |
67481ae5 | 9915 | |
5f5c8ee5 GM |
9916 | 1. We hit ZV without displaying anything. In this case, max_ascent |
9917 | and max_height will be zero. | |
1c9241f5 | 9918 | |
5f5c8ee5 GM |
9919 | 2. We have some glyphs that don't contribute to the line height. |
9920 | (The glyph row flag contributes_to_line_height_p is for future | |
9921 | pixmap extensions). | |
f6fd109b | 9922 | |
5f5c8ee5 GM |
9923 | The first case is easily covered by using default values because in |
9924 | these cases, the line height does not really matter, except that it | |
9925 | must not be zero. */ | |
67481ae5 | 9926 | |
5f5c8ee5 GM |
9927 | static void |
9928 | compute_line_metrics (it) | |
9929 | struct it *it; | |
9930 | { | |
9931 | struct glyph_row *row = it->glyph_row; | |
9932 | int area, i; | |
1c2250c2 | 9933 | |
5f5c8ee5 GM |
9934 | if (FRAME_WINDOW_P (it->f)) |
9935 | { | |
9936 | int i, top_line_height; | |
1c2250c2 | 9937 | |
5f5c8ee5 GM |
9938 | /* The line may consist of one space only, that was added to |
9939 | place the cursor on it. If so, the row's height hasn't been | |
9940 | computed yet. */ | |
9941 | if (row->height == 0) | |
9942 | { | |
9943 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 9944 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
9945 | row->ascent = it->max_ascent; |
9946 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
9947 | row->phys_ascent = it->max_phys_ascent; |
9948 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
9949 | } |
9950 | ||
9951 | /* Compute the width of this line. */ | |
9952 | row->pixel_width = row->x; | |
9953 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
9954 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
9955 | ||
9956 | xassert (row->pixel_width >= 0); | |
9957 | xassert (row->ascent >= 0 && row->height > 0); | |
9958 | ||
312246d1 GM |
9959 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
9960 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
9961 | ||
9962 | /* If first line's physical ascent is larger than its logical | |
9963 | ascent, use the physical ascent, and make the row taller. | |
9964 | This makes accented characters fully visible. */ | |
9965 | if (row == it->w->desired_matrix->rows | |
9966 | && row->phys_ascent > row->ascent) | |
9967 | { | |
9968 | row->height += row->phys_ascent - row->ascent; | |
9969 | row->ascent = row->phys_ascent; | |
9970 | } | |
9971 | ||
5f5c8ee5 GM |
9972 | /* Compute how much of the line is visible. */ |
9973 | row->visible_height = row->height; | |
9974 | ||
9975 | top_line_height = WINDOW_DISPLAY_TOP_LINE_HEIGHT (it->w); | |
9976 | if (row->y < top_line_height) | |
9977 | row->visible_height -= top_line_height - row->y; | |
9978 | else | |
9979 | { | |
9980 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
9981 | if (row->y + row->height > max_y) | |
9982 | row->visible_height -= row->y + row->height - max_y; | |
9983 | } | |
9984 | } | |
9985 | else | |
9986 | { | |
9987 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
9988 | row->ascent = row->phys_ascent = 0; |
9989 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 9990 | } |
67481ae5 | 9991 | |
5f5c8ee5 GM |
9992 | /* Compute a hash code for this row. */ |
9993 | row->hash = 0; | |
9994 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
9995 | for (i = 0; i < row->used[area]; ++i) | |
9996 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
9997 | + row->glyphs[area][i].u.val | |
9998 | + (row->glyphs[area][i].type << 2)); | |
a2889657 | 9999 | |
5f5c8ee5 | 10000 | it->max_ascent = it->max_descent = 0; |
312246d1 | 10001 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 10002 | } |
12adba34 | 10003 | |
ca26e1c8 | 10004 | |
5f5c8ee5 GM |
10005 | /* Append one space to the glyph row of iterator IT if doing a |
10006 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
10007 | space have the default face, otherwise let it have the same face as | |
10008 | IT->face_id. This function is called to make sure that there is | |
10009 | always one glyph at the end of a glyph row that the cursor can be | |
10010 | set on under window-systems. (If there weren't such a glyph we | |
10011 | would not know how wide and tall the cursor should be displayed). */ | |
ca26e1c8 | 10012 | |
5f5c8ee5 GM |
10013 | static void |
10014 | append_space (it, default_face_p) | |
10015 | struct it *it; | |
10016 | int default_face_p; | |
10017 | { | |
10018 | if (FRAME_WINDOW_P (it->f)) | |
10019 | { | |
10020 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 10021 | |
5f5c8ee5 GM |
10022 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
10023 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 10024 | { |
5f5c8ee5 GM |
10025 | /* Save some values that must not be changed. */ |
10026 | int saved_x = it->current_x; | |
10027 | struct text_pos saved_pos; | |
10028 | int saved_what = it->what; | |
10029 | int saved_face_id = it->face_id; | |
10030 | int saved_charset = it->charset; | |
10031 | Lisp_Object saved_object; | |
10032 | ||
10033 | saved_object = it->object; | |
10034 | saved_pos = it->position; | |
10035 | ||
10036 | it->what = IT_CHARACTER; | |
10037 | bzero (&it->position, sizeof it->position); | |
10038 | it->object = 0; | |
10039 | it->c = ' '; | |
10040 | it->len = 1; | |
10041 | it->charset = CHARSET_ASCII; | |
10042 | ||
10043 | if (default_face_p) | |
10044 | it->face_id = DEFAULT_FACE_ID; | |
10045 | if (it->multibyte_p) | |
10046 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, CHARSET_ASCII); | |
10047 | else | |
10048 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, -1); | |
1842fc1a | 10049 | |
5f5c8ee5 GM |
10050 | PRODUCE_GLYPHS (it); |
10051 | ||
10052 | it->current_x = saved_x; | |
10053 | it->object = saved_object; | |
10054 | it->position = saved_pos; | |
10055 | it->what = saved_what; | |
10056 | it->face_id = saved_face_id; | |
10057 | it->charset = saved_charset; | |
10058 | } | |
10059 | } | |
10060 | } | |
12adba34 | 10061 | |
1842fc1a | 10062 | |
5f5c8ee5 GM |
10063 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
10064 | to the end of the display line. Called from display_line. | |
10065 | If the glyph row is empty, add a space glyph to it so that we | |
10066 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
10067 | ||
10068 | static void | |
10069 | extend_face_to_end_of_line (it) | |
10070 | struct it *it; | |
10071 | { | |
10072 | struct face *face; | |
10073 | struct frame *f = it->f; | |
1842fc1a | 10074 | |
5f5c8ee5 GM |
10075 | /* If line is already filled, do nothing. */ |
10076 | if (it->current_x >= it->last_visible_x) | |
10077 | return; | |
10078 | ||
10079 | /* Face extension extends the background and box of IT->face_id | |
10080 | to the end of the line. If the background equals the background | |
10081 | of the frame, we haven't to do anything. */ | |
10082 | face = FACE_FROM_ID (f, it->face_id); | |
10083 | if (FRAME_WINDOW_P (f) | |
10084 | && face->box == FACE_NO_BOX | |
10085 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
10086 | && !face->stipple) | |
10087 | return; | |
1842fc1a | 10088 | |
5f5c8ee5 GM |
10089 | /* Set the glyph row flag indicating that the face of the last glyph |
10090 | in the text area has to be drawn to the end of the text area. */ | |
10091 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 10092 | |
5f5c8ee5 GM |
10093 | /* If current charset of IT is not ASCII, make sure we have the |
10094 | ASCII face. This will be automatically undone the next time | |
10095 | get_next_display_element returns a character from a different | |
10096 | charset. Note that the charset will always be ASCII in unibyte | |
10097 | text. */ | |
10098 | if (it->charset != CHARSET_ASCII) | |
10099 | { | |
10100 | it->charset = CHARSET_ASCII; | |
10101 | it->face_id = FACE_FOR_CHARSET (f, it->face_id, CHARSET_ASCII); | |
10102 | } | |
545e04f6 | 10103 | |
5f5c8ee5 GM |
10104 | if (FRAME_WINDOW_P (f)) |
10105 | { | |
10106 | /* If the row is empty, add a space with the current face of IT, | |
10107 | so that we know which face to draw. */ | |
10108 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 10109 | { |
5f5c8ee5 GM |
10110 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
10111 | it->glyph_row->glyphs[TEXT_AREA][0].u.ch.face_id = it->face_id; | |
10112 | it->glyph_row->used[TEXT_AREA] = 1; | |
a2889657 | 10113 | } |
5f5c8ee5 GM |
10114 | } |
10115 | else | |
10116 | { | |
10117 | /* Save some values that must not be changed. */ | |
10118 | int saved_x = it->current_x; | |
10119 | struct text_pos saved_pos; | |
10120 | Lisp_Object saved_object; | |
10121 | int saved_what = it->what; | |
10122 | ||
10123 | saved_object = it->object; | |
10124 | saved_pos = it->position; | |
10125 | ||
10126 | it->what = IT_CHARACTER; | |
10127 | bzero (&it->position, sizeof it->position); | |
10128 | it->object = 0; | |
10129 | it->c = ' '; | |
10130 | it->len = 1; | |
10131 | ||
10132 | PRODUCE_GLYPHS (it); | |
10133 | ||
10134 | while (it->current_x <= it->last_visible_x) | |
10135 | PRODUCE_GLYPHS (it); | |
10136 | ||
10137 | /* Don't count these blanks really. It would let us insert a left | |
10138 | truncation glyph below and make us set the cursor on them, maybe. */ | |
10139 | it->current_x = saved_x; | |
10140 | it->object = saved_object; | |
10141 | it->position = saved_pos; | |
10142 | it->what = saved_what; | |
10143 | } | |
10144 | } | |
12adba34 | 10145 | |
545e04f6 | 10146 | |
5f5c8ee5 GM |
10147 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
10148 | trailing whitespace. */ | |
1c9241f5 | 10149 | |
5f5c8ee5 GM |
10150 | static int |
10151 | trailing_whitespace_p (charpos) | |
10152 | int charpos; | |
10153 | { | |
10154 | int bytepos = CHAR_TO_BYTE (charpos); | |
10155 | int c = 0; | |
7bbe686f | 10156 | |
5f5c8ee5 GM |
10157 | while (bytepos < ZV_BYTE |
10158 | && (c = FETCH_CHAR (bytepos), | |
10159 | c == ' ' || c == '\t')) | |
10160 | ++bytepos; | |
0d09d1e6 | 10161 | |
5f5c8ee5 GM |
10162 | return bytepos >= ZV_BYTE || c == '\n' || c == '\r'; |
10163 | } | |
31b24551 | 10164 | |
545e04f6 | 10165 | |
5f5c8ee5 | 10166 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 10167 | |
5f5c8ee5 GM |
10168 | void |
10169 | highlight_trailing_whitespace (f, row) | |
10170 | struct frame *f; | |
10171 | struct glyph_row *row; | |
10172 | { | |
10173 | int used = row->used[TEXT_AREA]; | |
10174 | ||
10175 | if (used) | |
10176 | { | |
10177 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
10178 | struct glyph *glyph = start + used - 1; | |
10179 | ||
10180 | /* Skip over the space glyph inserted to display the | |
10181 | cursor at the end of a line. */ | |
10182 | if (glyph->type == CHAR_GLYPH | |
10183 | && glyph->u.ch.code == ' ' | |
10184 | && glyph->object == 0) | |
10185 | --glyph; | |
10186 | ||
10187 | /* If last glyph is a space or stretch, and it's trailing | |
10188 | whitespace, set the face of all trailing whitespace glyphs in | |
10189 | IT->glyph_row to `trailing-whitespace'. */ | |
10190 | if (glyph >= start | |
10191 | && BUFFERP (glyph->object) | |
10192 | && (glyph->type == STRETCH_GLYPH | |
10193 | || (glyph->type == CHAR_GLYPH | |
10194 | && glyph->u.ch.code == ' ')) | |
10195 | && trailing_whitespace_p (glyph->charpos)) | |
545e04f6 | 10196 | { |
5f5c8ee5 GM |
10197 | int face_id = lookup_named_face (f, Qtrailing_whitespace, |
10198 | CHARSET_ASCII); | |
10199 | ||
10200 | while (glyph >= start | |
10201 | && BUFFERP (glyph->object) | |
10202 | && (glyph->type == STRETCH_GLYPH | |
10203 | || (glyph->type == CHAR_GLYPH | |
10204 | && glyph->u.ch.code == ' '))) | |
545e04f6 | 10205 | { |
5f5c8ee5 GM |
10206 | if (glyph->type == STRETCH_GLYPH) |
10207 | glyph->u.stretch.face_id = face_id; | |
10208 | else | |
10209 | glyph->u.ch.face_id = face_id; | |
10210 | --glyph; | |
545e04f6 KH |
10211 | } |
10212 | } | |
a2889657 | 10213 | } |
5f5c8ee5 | 10214 | } |
a2889657 | 10215 | |
5fcbb24d | 10216 | |
a2889657 | 10217 | |
5f5c8ee5 GM |
10218 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
10219 | IT->w from text at the current position of IT. See dispextern.h | |
10220 | for an overview of struct it. Value is non-zero if | |
10221 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
10222 | only. */ | |
10223 | ||
10224 | static int | |
10225 | display_line (it) | |
10226 | struct it *it; | |
10227 | { | |
10228 | struct glyph_row *row = it->glyph_row; | |
10229 | ||
10230 | /* We always start displaying at hpos zero even if hscrolled. */ | |
10231 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 10232 | |
5f5c8ee5 GM |
10233 | /* We must not display in a row that's not a text row. */ |
10234 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
10235 | < it->w->desired_matrix->nrows); | |
12adba34 | 10236 | |
5f5c8ee5 GM |
10237 | /* Is IT->w showing the region? */ |
10238 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 10239 | |
5f5c8ee5 GM |
10240 | /* Clear the result glyph row and enable it. */ |
10241 | prepare_desired_row (row); | |
12adba34 | 10242 | |
5f5c8ee5 GM |
10243 | row->y = it->current_y; |
10244 | row->start = it->current; | |
10245 | row->continuation_lines_width = it->continuation_lines_width; | |
10246 | row->displays_text_p = 1; | |
10247 | ||
10248 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
10249 | display_line on only one line at a time, in which case this | |
10250 | can't really hurt too much, or we call it on lines which appear | |
10251 | one after another in the buffer, in which case all calls to | |
10252 | recenter_overlay_lists but the first will be pretty cheap. */ | |
10253 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
10254 | ||
10255 | #if NO_PROMPT_IN_BUFFER | |
10256 | /* Show mini-buffer prompt, if at the beginning of a mini-buffer | |
10257 | window. */ | |
10258 | if (MINI_WINDOW_P (it->w) | |
10259 | && MATRIX_ROW_START_CHARPOS (row) == BEG | |
10260 | && it->vpos == 0) | |
10261 | { | |
10262 | if (NILP (minibuf_prompt)) | |
10263 | minibuf_prompt_width = minibuf_prompt_pixel_width = 0; | |
a2889657 | 10264 | else |
a2889657 | 10265 | { |
5f5c8ee5 GM |
10266 | /* We would like to truncate the prompt a little bit before |
10267 | the right margin of the window, so that user input can | |
10268 | start on the first line. Set max_x to this position. */ | |
10269 | int max_x = (it->last_visible_x - 4 * CANON_X_UNIT (it->f)); | |
10270 | ||
10271 | /* We use a temporary iterator different from IT so that | |
10272 | IT's settings are not overwritten when displaying | |
10273 | the prompt. */ | |
10274 | struct it ti; | |
10275 | ||
10276 | ti = *it; | |
10277 | ||
10278 | /* Display the prompt. Set minibuf_prompt_width to the | |
10279 | number of glyphs generated for the prompt, set | |
10280 | minibuf_prompt_pixel_width to its width in pixels. */ | |
10281 | xassert (it->current_x == 0); | |
10282 | display_string (NULL, minibuf_prompt, Qnil, 0, 0, &ti, | |
10283 | 0, 0, max_x, -1); | |
10284 | minibuf_prompt_width = ti.hpos; | |
10285 | minibuf_prompt_pixel_width = ti.current_x; | |
10286 | ||
10287 | /* Transfer pixel and hpos information to IT. */ | |
10288 | it->hpos = ti.hpos; | |
10289 | it->current_x = ti.current_x; | |
10290 | } | |
10291 | } | |
10292 | #endif /* NO_PROMPT_IN_BUFFER */ | |
10293 | ||
10294 | /* Move over display elements that are not visible because we are | |
10295 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
10296 | if the first glyph is partially visible or if we hit a line end. */ | |
10297 | if (it->current_x < it->first_visible_x) | |
10298 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
10299 | MOVE_TO_POS | MOVE_TO_X); | |
10300 | ||
10301 | /* Get the initial row height. This is either the height of the | |
10302 | text hscrolled, if there is any, or zero. */ | |
10303 | row->ascent = it->max_ascent; | |
10304 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10305 | row->phys_ascent = it->max_phys_ascent; |
10306 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10307 | |
10308 | /* Loop generating characters. The loop is left with IT on the next | |
10309 | character to display. */ | |
10310 | while (1) | |
10311 | { | |
10312 | int n_glyphs_before, hpos_before, x_before; | |
10313 | int x, i, nglyphs; | |
10314 | ||
10315 | /* Retrieve the next thing to display. Value is zero if end of | |
10316 | buffer reached. */ | |
10317 | if (!get_next_display_element (it)) | |
10318 | { | |
10319 | /* Maybe add a space at the end of this line that is used to | |
10320 | display the cursor there under X. */ | |
10321 | append_space (it, 1); | |
10322 | ||
10323 | /* The position -1 below indicates a blank line not | |
10324 | corresponding to any text, as opposed to an empty line | |
10325 | corresponding to a line end. */ | |
10326 | if (row->used[TEXT_AREA] <= 1) | |
a2889657 | 10327 | { |
5f5c8ee5 GM |
10328 | row->glyphs[TEXT_AREA]->charpos = -1; |
10329 | row->displays_text_p = 0; | |
10330 | ||
10331 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
10332 | row->indicate_empty_line_p = 1; | |
a2889657 | 10333 | } |
5f5c8ee5 GM |
10334 | |
10335 | it->continuation_lines_width = 0; | |
10336 | row->ends_at_zv_p = 1; | |
10337 | break; | |
a2889657 | 10338 | } |
a2889657 | 10339 | |
5f5c8ee5 GM |
10340 | /* Now, get the metrics of what we want to display. This also |
10341 | generates glyphs in `row' (which is IT->glyph_row). */ | |
10342 | n_glyphs_before = row->used[TEXT_AREA]; | |
10343 | x = it->current_x; | |
10344 | PRODUCE_GLYPHS (it); | |
a2889657 | 10345 | |
5f5c8ee5 GM |
10346 | /* If this display element was in marginal areas, continue with |
10347 | the next one. */ | |
10348 | if (it->area != TEXT_AREA) | |
a2889657 | 10349 | { |
5f5c8ee5 GM |
10350 | row->ascent = max (row->ascent, it->max_ascent); |
10351 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10352 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10353 | row->phys_height = max (row->phys_height, | |
10354 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10355 | set_iterator_to_next (it); |
10356 | continue; | |
10357 | } | |
5936754e | 10358 | |
5f5c8ee5 GM |
10359 | /* Does the display element fit on the line? If we truncate |
10360 | lines, we should draw past the right edge of the window. If | |
10361 | we don't truncate, we want to stop so that we can display the | |
10362 | continuation glyph before the right margin. If lines are | |
10363 | continued, there are two possible strategies for characters | |
10364 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
10365 | glyphs as possible in this line and leave the rest for the | |
10366 | continuation line, or display the whole element in the next | |
10367 | line. Original redisplay did the former, so we do it also. */ | |
10368 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
10369 | hpos_before = it->hpos; | |
10370 | x_before = x; | |
10371 | ||
10372 | if (nglyphs == 1 | |
10373 | && it->current_x < it->last_visible_x) | |
10374 | { | |
10375 | ++it->hpos; | |
10376 | row->ascent = max (row->ascent, it->max_ascent); | |
10377 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10378 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10379 | row->phys_height = max (row->phys_height, | |
10380 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10381 | if (it->current_x - it->pixel_width < it->first_visible_x) |
10382 | row->x = x - it->first_visible_x; | |
10383 | } | |
10384 | else | |
10385 | { | |
10386 | int new_x; | |
10387 | struct glyph *glyph; | |
10388 | ||
10389 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 10390 | { |
5f5c8ee5 GM |
10391 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
10392 | new_x = x + glyph->pixel_width; | |
10393 | ||
10394 | if (/* Lines are continued. */ | |
10395 | !it->truncate_lines_p | |
10396 | && (/* Glyph doesn't fit on the line. */ | |
10397 | new_x > it->last_visible_x | |
10398 | /* Or it fits exactly on a window system frame. */ | |
10399 | || (new_x == it->last_visible_x | |
10400 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 10401 | { |
5f5c8ee5 GM |
10402 | /* End of a continued line. */ |
10403 | ||
10404 | if (it->hpos == 0 | |
10405 | || (new_x == it->last_visible_x | |
10406 | && FRAME_WINDOW_P (it->f))) | |
10407 | { | |
10408 | /* Current glyph fits exactly on the line. We | |
10409 | must continue the line because we can't draw | |
10410 | the cursor after the glyph. */ | |
10411 | row->continued_p = 1; | |
10412 | it->current_x = new_x; | |
10413 | it->continuation_lines_width += new_x; | |
10414 | ++it->hpos; | |
10415 | if (i == nglyphs - 1) | |
10416 | set_iterator_to_next (it); | |
10417 | } | |
10418 | else | |
5936754e | 10419 | { |
5f5c8ee5 GM |
10420 | /* Display element draws past the right edge of |
10421 | the window. Restore positions to values | |
10422 | before the element. The next line starts | |
10423 | with current_x before the glyph that could | |
10424 | not be displayed, so that TAB works right. */ | |
10425 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
10426 | ||
10427 | /* Display continuation glyphs. */ | |
10428 | if (!FRAME_WINDOW_P (it->f)) | |
10429 | produce_special_glyphs (it, IT_CONTINUATION); | |
10430 | row->continued_p = 1; | |
10431 | ||
10432 | it->current_x = x; | |
10433 | it->continuation_lines_width += x; | |
5936754e | 10434 | } |
5f5c8ee5 GM |
10435 | break; |
10436 | } | |
10437 | else if (new_x > it->first_visible_x) | |
10438 | { | |
10439 | /* Increment number of glyphs actually displayed. */ | |
10440 | ++it->hpos; | |
10441 | ||
10442 | if (x < it->first_visible_x) | |
10443 | /* Glyph is partially visible, i.e. row starts at | |
10444 | negative X position. */ | |
10445 | row->x = x - it->first_visible_x; | |
10446 | } | |
10447 | else | |
10448 | { | |
10449 | /* Glyph is completely off the left margin of the | |
10450 | window. This should not happen because of the | |
10451 | move_it_in_display_line at the start of | |
10452 | this function. */ | |
10453 | abort (); | |
a2889657 | 10454 | } |
a2889657 | 10455 | } |
5f5c8ee5 GM |
10456 | |
10457 | row->ascent = max (row->ascent, it->max_ascent); | |
10458 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10459 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10460 | row->phys_height = max (row->phys_height, | |
10461 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10462 | |
10463 | /* End of this display line if row is continued. */ | |
10464 | if (row->continued_p) | |
10465 | break; | |
a2889657 | 10466 | } |
a2889657 | 10467 | |
5f5c8ee5 GM |
10468 | /* Is this a line end? If yes, we're also done, after making |
10469 | sure that a non-default face is extended up to the right | |
10470 | margin of the window. */ | |
10471 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 10472 | { |
5f5c8ee5 GM |
10473 | int used_before = row->used[TEXT_AREA]; |
10474 | ||
10475 | /* Add a space at the end of the line that is used to | |
10476 | display the cursor there. */ | |
10477 | append_space (it, 0); | |
10478 | ||
10479 | /* Extend the face to the end of the line. */ | |
10480 | extend_face_to_end_of_line (it); | |
10481 | ||
10482 | /* Make sure we have the position. */ | |
10483 | if (used_before == 0) | |
10484 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
10485 | ||
10486 | /* Consume the line end. This skips over invisible lines. */ | |
10487 | set_iterator_to_next (it); | |
10488 | it->continuation_lines_width = 0; | |
10489 | break; | |
1c9241f5 | 10490 | } |
a2889657 | 10491 | |
5f5c8ee5 GM |
10492 | /* Proceed with next display element. Note that this skips |
10493 | over lines invisible because of selective display. */ | |
10494 | set_iterator_to_next (it); | |
b1d1124b | 10495 | |
5f5c8ee5 GM |
10496 | /* If we truncate lines, we are done when the last displayed |
10497 | glyphs reach past the right margin of the window. */ | |
10498 | if (it->truncate_lines_p | |
10499 | && (FRAME_WINDOW_P (it->f) | |
10500 | ? (it->current_x >= it->last_visible_x) | |
10501 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 10502 | { |
5f5c8ee5 GM |
10503 | /* Maybe add truncation glyphs. */ |
10504 | if (!FRAME_WINDOW_P (it->f)) | |
10505 | { | |
10506 | --it->glyph_row->used[TEXT_AREA]; | |
10507 | produce_special_glyphs (it, IT_TRUNCATION); | |
10508 | } | |
10509 | ||
10510 | row->truncated_on_right_p = 1; | |
10511 | it->continuation_lines_width = 0; | |
312246d1 | 10512 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
10513 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
10514 | it->hpos = hpos_before; | |
10515 | it->current_x = x_before; | |
10516 | break; | |
75d13c64 | 10517 | } |
a2889657 | 10518 | } |
a2889657 | 10519 | |
5f5c8ee5 GM |
10520 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
10521 | at the left window margin. */ | |
10522 | if (it->first_visible_x | |
10523 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
10524 | { | |
10525 | if (!FRAME_WINDOW_P (it->f)) | |
10526 | insert_left_trunc_glyphs (it); | |
10527 | row->truncated_on_left_p = 1; | |
10528 | } | |
a2889657 | 10529 | |
5f5c8ee5 GM |
10530 | /* If the start of this line is the overlay arrow-position, then |
10531 | mark this glyph row as the one containing the overlay arrow. | |
10532 | This is clearly a mess with variable size fonts. It would be | |
10533 | better to let it be displayed like cursors under X. */ | |
e24c997d | 10534 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 10535 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
10536 | && (MATRIX_ROW_START_CHARPOS (row) |
10537 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 10538 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
10539 | && ! overlay_arrow_seen) |
10540 | { | |
5f5c8ee5 GM |
10541 | /* Overlay arrow in window redisplay is a bitmap. */ |
10542 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 10543 | { |
5f5c8ee5 GM |
10544 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
10545 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
10546 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
10547 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
10548 | struct glyph *p2, *end; | |
10549 | ||
10550 | /* Copy the arrow glyphs. */ | |
10551 | while (glyph < arrow_end) | |
10552 | *p++ = *glyph++; | |
10553 | ||
10554 | /* Throw away padding glyphs. */ | |
10555 | p2 = p; | |
10556 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
10557 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
10558 | ++p2; | |
10559 | if (p2 > p) | |
212e4f87 | 10560 | { |
5f5c8ee5 GM |
10561 | while (p2 < end) |
10562 | *p++ = *p2++; | |
10563 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 10564 | } |
c4628384 | 10565 | } |
5f5c8ee5 | 10566 | |
a2889657 | 10567 | overlay_arrow_seen = 1; |
5f5c8ee5 | 10568 | row->overlay_arrow_p = 1; |
a2889657 JB |
10569 | } |
10570 | ||
5f5c8ee5 GM |
10571 | /* Compute pixel dimensions of this line. */ |
10572 | compute_line_metrics (it); | |
10573 | ||
10574 | /* Remember the position at which this line ends. */ | |
10575 | row->end = it->current; | |
10576 | ||
10577 | /* Maybe set the cursor. If you change this, it's probably a good | |
10578 | idea to also change the code in redisplay_window for cursor | |
10579 | movement in an unchanged window. */ | |
10580 | if (it->w->cursor.vpos < 0 | |
10581 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
10582 | && MATRIX_ROW_END_CHARPOS (row) >= PT | |
10583 | && !(MATRIX_ROW_END_CHARPOS (row) == PT | |
10584 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
10585 | || !row->ends_at_zv_p))) | |
10586 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
10587 | ||
10588 | /* Highlight trailing whitespace. */ | |
10589 | if (it->show_trailing_whitespace_p) | |
10590 | highlight_trailing_whitespace (it->f, it->glyph_row); | |
10591 | ||
10592 | /* Prepare for the next line. This line starts horizontally at (X | |
10593 | HPOS) = (0 0). Vertical positions are incremented. As a | |
10594 | convenience for the caller, IT->glyph_row is set to the next | |
10595 | row to be used. */ | |
10596 | it->current_x = it->hpos = 0; | |
10597 | it->current_y += row->height; | |
10598 | ++it->vpos; | |
10599 | ++it->glyph_row; | |
10600 | return row->displays_text_p; | |
a2889657 | 10601 | } |
5f5c8ee5 GM |
10602 | |
10603 | ||
a2889657 | 10604 | \f |
5f5c8ee5 GM |
10605 | /*********************************************************************** |
10606 | Menu Bar | |
10607 | ***********************************************************************/ | |
10608 | ||
10609 | /* Redisplay the menu bar in the frame for window W. | |
10610 | ||
10611 | The menu bar of X frames that don't have X toolkit support is | |
10612 | displayed in a special window W->frame->menu_bar_window. | |
10613 | ||
10614 | The menu bar of terminal frames is treated specially as far as | |
10615 | glyph matrices are concerned. Menu bar lines are not part of | |
10616 | windows, so the update is done directly on the frame matrix rows | |
10617 | for the menu bar. */ | |
7ce2c095 RS |
10618 | |
10619 | static void | |
10620 | display_menu_bar (w) | |
10621 | struct window *w; | |
10622 | { | |
5f5c8ee5 GM |
10623 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
10624 | struct it it; | |
10625 | Lisp_Object items; | |
8351baf2 | 10626 | int i; |
7ce2c095 | 10627 | |
5f5c8ee5 | 10628 | /* Don't do all this for graphical frames. */ |
dc937613 | 10629 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
10630 | if (!NILP (Vwindow_system)) |
10631 | return; | |
dc937613 | 10632 | #endif |
dc937613 | 10633 | #ifdef USE_X_TOOLKIT |
d3413a53 | 10634 | if (FRAME_X_P (f)) |
7ce2c095 | 10635 | return; |
5f5c8ee5 GM |
10636 | #endif |
10637 | ||
10638 | #ifdef USE_X_TOOLKIT | |
10639 | xassert (!FRAME_WINDOW_P (f)); | |
10640 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MODE_LINE_FACE_ID); | |
10641 | it.first_visible_x = 0; | |
10642 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
10643 | #else /* not USE_X_TOOLKIT */ | |
10644 | if (FRAME_WINDOW_P (f)) | |
10645 | { | |
10646 | /* Menu bar lines are displayed in the desired matrix of the | |
10647 | dummy window menu_bar_window. */ | |
10648 | struct window *menu_w; | |
10649 | xassert (WINDOWP (f->menu_bar_window)); | |
10650 | menu_w = XWINDOW (f->menu_bar_window); | |
10651 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
10652 | MODE_LINE_FACE_ID); | |
10653 | it.first_visible_x = 0; | |
10654 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
10655 | } | |
10656 | else | |
10657 | { | |
10658 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
10659 | pixel x/y. */ | |
10660 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
10661 | MODE_LINE_FACE_ID); | |
10662 | it.first_visible_x = 0; | |
10663 | it.last_visible_x = FRAME_WIDTH (f); | |
10664 | } | |
10665 | #endif /* not USE_X_TOOLKIT */ | |
10666 | ||
10667 | /* Clear all rows of the menu bar. */ | |
10668 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
10669 | { | |
10670 | struct glyph_row *row = it.glyph_row + i; | |
10671 | clear_glyph_row (row); | |
10672 | row->enabled_p = 1; | |
10673 | row->full_width_p = 1; | |
10674 | } | |
7ce2c095 | 10675 | |
5f5c8ee5 GM |
10676 | /* Make the first line of the menu bar appear in reverse video. */ |
10677 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 10678 | |
5f5c8ee5 GM |
10679 | /* Display all items of the menu bar. */ |
10680 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 10681 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 10682 | { |
5f5c8ee5 GM |
10683 | Lisp_Object string; |
10684 | ||
10685 | /* Stop at nil string. */ | |
8351baf2 RS |
10686 | string = XVECTOR (items)->contents[i + 1]; |
10687 | if (NILP (string)) | |
10688 | break; | |
2d66ad19 | 10689 | |
5f5c8ee5 GM |
10690 | /* Remember where item was displayed. */ |
10691 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 10692 | |
5f5c8ee5 GM |
10693 | /* Display the item, pad with one space. */ |
10694 | if (it.current_x < it.last_visible_x) | |
10695 | display_string (NULL, string, Qnil, 0, 0, &it, | |
10696 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
10697 | } |
10698 | ||
2d66ad19 | 10699 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
10700 | if (it.current_x < it.last_visible_x) |
10701 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 10702 | |
5f5c8ee5 GM |
10703 | /* Compute the total height of the lines. */ |
10704 | compute_line_metrics (&it); | |
7ce2c095 | 10705 | } |
5f5c8ee5 GM |
10706 | |
10707 | ||
7ce2c095 | 10708 | \f |
5f5c8ee5 GM |
10709 | /*********************************************************************** |
10710 | Mode Line | |
10711 | ***********************************************************************/ | |
10712 | ||
10713 | /* Display the mode and/or top line of window W. */ | |
a2889657 JB |
10714 | |
10715 | static void | |
5f5c8ee5 | 10716 | display_mode_lines (w) |
a2889657 JB |
10717 | struct window *w; |
10718 | { | |
5f5c8ee5 | 10719 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 10720 | line_number_displayed = 0; |
155ef550 | 10721 | w->column_number_displayed = Qnil; |
aa6d10fa | 10722 | |
5f5c8ee5 GM |
10723 | if (WINDOW_WANTS_MODELINE_P (w)) |
10724 | display_mode_line (w, MODE_LINE_FACE_ID, current_buffer->mode_line_format); | |
10725 | ||
10726 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
10727 | display_mode_line (w, TOP_LINE_FACE_ID, current_buffer->top_line_format); | |
10728 | } | |
03b294dc | 10729 | |
03b294dc | 10730 | |
5f5c8ee5 GM |
10731 | /* Display mode or top line of window W. FACE_ID specifies which line |
10732 | to display; it is either MODE_LINE_FACE_ID or TOP_LINE_FACE_ID. | |
10733 | FORMAT is the mode line format to display. */ | |
03b294dc | 10734 | |
5f5c8ee5 GM |
10735 | static void |
10736 | display_mode_line (w, face_id, format) | |
10737 | struct window *w; | |
10738 | enum face_id face_id; | |
10739 | Lisp_Object format; | |
10740 | { | |
10741 | struct it it; | |
10742 | struct face *face; | |
03b294dc | 10743 | |
5f5c8ee5 GM |
10744 | init_iterator (&it, w, -1, -1, NULL, face_id); |
10745 | prepare_desired_row (it.glyph_row); | |
10746 | ||
10747 | /* Temporarily make frame's keyboard the current kboard so that | |
10748 | kboard-local variables in the mode_line_format will get the right | |
10749 | values. */ | |
10750 | push_frame_kboard (it.f); | |
10751 | display_mode_element (&it, 0, 0, 0, format); | |
10752 | pop_frame_kboard (); | |
a2889657 | 10753 | |
5f5c8ee5 GM |
10754 | /* Fill up with spaces. */ |
10755 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
10756 | ||
10757 | compute_line_metrics (&it); | |
10758 | it.glyph_row->full_width_p = 1; | |
10759 | it.glyph_row->mode_line_p = 1; | |
10760 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
10761 | it.glyph_row->continued_p = 0; | |
10762 | it.glyph_row->truncated_on_left_p = 0; | |
10763 | it.glyph_row->truncated_on_right_p = 0; | |
10764 | ||
10765 | /* Make a 3D mode-line have a shadow at its right end. */ | |
10766 | face = FACE_FROM_ID (it.f, face_id); | |
10767 | extend_face_to_end_of_line (&it); | |
10768 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 10769 | { |
5f5c8ee5 GM |
10770 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
10771 | + it.glyph_row->used[TEXT_AREA] - 1); | |
10772 | last->right_box_line_p = 1; | |
d7eb09a0 | 10773 | } |
a2889657 JB |
10774 | } |
10775 | ||
a2889657 | 10776 | |
5f5c8ee5 GM |
10777 | /* Contribute ELT to the mode line for window IT->w. How it |
10778 | translates into text depends on its data type. | |
a2889657 | 10779 | |
5f5c8ee5 | 10780 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
10781 | |
10782 | DEPTH is the depth in recursion. It is used to prevent | |
10783 | infinite recursion here. | |
10784 | ||
5f5c8ee5 GM |
10785 | FIELD_WIDTH is the number of characters the display of ELT should |
10786 | occupy in the mode line, and PRECISION is the maximum number of | |
10787 | characters to display from ELT's representation. See | |
10788 | display_string for details. * | |
a2889657 | 10789 | |
5f5c8ee5 | 10790 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
10791 | |
10792 | static int | |
5f5c8ee5 GM |
10793 | display_mode_element (it, depth, field_width, precision, elt) |
10794 | struct it *it; | |
a2889657 | 10795 | int depth; |
5f5c8ee5 GM |
10796 | int field_width, precision; |
10797 | Lisp_Object elt; | |
a2889657 | 10798 | { |
5f5c8ee5 GM |
10799 | int n = 0, field, prec; |
10800 | ||
a2889657 JB |
10801 | tail_recurse: |
10802 | if (depth > 10) | |
10803 | goto invalid; | |
10804 | ||
10805 | depth++; | |
10806 | ||
0220c518 | 10807 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
10808 | { |
10809 | case Lisp_String: | |
10810 | { | |
10811 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
10812 | unsigned char c; |
10813 | unsigned char *this = XSTRING (elt)->data; | |
10814 | unsigned char *lisp_string = this; | |
10815 | ||
10816 | while ((precision <= 0 || n < precision) | |
10817 | && *this | |
10818 | && (frame_title_ptr | |
10819 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
10820 | { |
10821 | unsigned char *last = this; | |
5f5c8ee5 GM |
10822 | |
10823 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
10824 | while ((c = *this++) != '\0' && c != '%') |
10825 | ; | |
5f5c8ee5 | 10826 | |
a2889657 JB |
10827 | if (this - 1 != last) |
10828 | { | |
5f5c8ee5 GM |
10829 | /* Output to end of string or up to '%'. Field width |
10830 | is length of string. Don't output more than | |
10831 | PRECISION allows us. */ | |
10832 | prec = --this - last; | |
10833 | if (precision > 0 && prec > precision - n) | |
10834 | prec = precision - n; | |
10835 | ||
d39b6696 | 10836 | if (frame_title_ptr) |
5f5c8ee5 | 10837 | n += store_frame_title (last, prec, prec); |
d39b6696 | 10838 | else |
5f5c8ee5 GM |
10839 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
10840 | it, 0, prec, 0, -1); | |
a2889657 JB |
10841 | } |
10842 | else /* c == '%' */ | |
10843 | { | |
5f5c8ee5 GM |
10844 | unsigned char *percent_position = this; |
10845 | ||
10846 | /* Get the specified minimum width. Zero means | |
10847 | don't pad. */ | |
10848 | field = 0; | |
a2889657 | 10849 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 10850 | field = field * 10 + c - '0'; |
a2889657 | 10851 | |
5f5c8ee5 GM |
10852 | /* Don't pad beyond the total padding allowed. */ |
10853 | if (field_width - n > 0 && field > field_width - n) | |
10854 | field = field_width - n; | |
a2889657 | 10855 | |
5f5c8ee5 GM |
10856 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
10857 | prec = precision - n; | |
10858 | ||
a2889657 | 10859 | if (c == 'M') |
5f5c8ee5 GM |
10860 | n += display_mode_element (it, depth, field, prec, |
10861 | Vglobal_mode_string); | |
a2889657 | 10862 | else if (c != 0) |
d39b6696 | 10863 | { |
5f5c8ee5 GM |
10864 | unsigned char *spec |
10865 | = decode_mode_spec (it->w, c, field, prec); | |
10866 | ||
d39b6696 | 10867 | if (frame_title_ptr) |
5f5c8ee5 | 10868 | n += store_frame_title (spec, field, prec); |
d39b6696 | 10869 | else |
5f5c8ee5 GM |
10870 | { |
10871 | int nglyphs_before | |
10872 | = it->glyph_row->used[TEXT_AREA]; | |
10873 | int charpos | |
10874 | = percent_position - XSTRING (elt)->data; | |
10875 | int nwritten | |
10876 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
10877 | field, prec, 0, -1); | |
10878 | ||
10879 | /* Assign to the glyphs written above the | |
10880 | string where the `%x' came from, position | |
10881 | of the `%'. */ | |
10882 | if (nwritten > 0) | |
10883 | { | |
10884 | struct glyph *glyph | |
10885 | = (it->glyph_row->glyphs[TEXT_AREA] | |
10886 | + nglyphs_before); | |
10887 | int i; | |
10888 | ||
10889 | for (i = 0; i < nwritten; ++i) | |
10890 | { | |
10891 | glyph[i].object = elt; | |
10892 | glyph[i].charpos = charpos; | |
10893 | } | |
10894 | ||
10895 | n += nwritten; | |
10896 | } | |
10897 | } | |
d39b6696 | 10898 | } |
a2889657 JB |
10899 | } |
10900 | } | |
10901 | } | |
10902 | break; | |
10903 | ||
10904 | case Lisp_Symbol: | |
10905 | /* A symbol: process the value of the symbol recursively | |
10906 | as if it appeared here directly. Avoid error if symbol void. | |
10907 | Special case: if value of symbol is a string, output the string | |
10908 | literally. */ | |
10909 | { | |
10910 | register Lisp_Object tem; | |
10911 | tem = Fboundp (elt); | |
265a9e55 | 10912 | if (!NILP (tem)) |
a2889657 JB |
10913 | { |
10914 | tem = Fsymbol_value (elt); | |
10915 | /* If value is a string, output that string literally: | |
10916 | don't check for % within it. */ | |
e24c997d | 10917 | if (STRINGP (tem)) |
d39b6696 | 10918 | { |
5f5c8ee5 GM |
10919 | prec = XSTRING (tem)->size; |
10920 | if (precision > 0 && prec > precision - n) | |
10921 | prec = precision - n; | |
d39b6696 | 10922 | if (frame_title_ptr) |
5f5c8ee5 | 10923 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 10924 | else |
5f5c8ee5 GM |
10925 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
10926 | 0, prec, 0, -1); | |
d39b6696 | 10927 | } |
a2889657 | 10928 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
10929 | { |
10930 | /* Give up right away for nil or t. */ | |
10931 | elt = tem; | |
10932 | goto tail_recurse; | |
10933 | } | |
a2889657 JB |
10934 | } |
10935 | } | |
10936 | break; | |
10937 | ||
10938 | case Lisp_Cons: | |
10939 | { | |
10940 | register Lisp_Object car, tem; | |
10941 | ||
10942 | /* A cons cell: three distinct cases. | |
10943 | If first element is a string or a cons, process all the elements | |
10944 | and effectively concatenate them. | |
10945 | If first element is a negative number, truncate displaying cdr to | |
10946 | at most that many characters. If positive, pad (with spaces) | |
10947 | to at least that many characters. | |
10948 | If first element is a symbol, process the cadr or caddr recursively | |
10949 | according to whether the symbol's value is non-nil or nil. */ | |
10950 | car = XCONS (elt)->car; | |
5f5c8ee5 GM |
10951 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
10952 | { | |
10953 | /* An element of the form (:eval FORM) means evaluate FORM | |
10954 | and use the result as mode line elements. */ | |
10955 | struct gcpro gcpro1; | |
10956 | Lisp_Object spec; | |
10957 | ||
10958 | spec = eval_form (XCAR (XCDR (elt))); | |
10959 | GCPRO1 (spec); | |
10960 | n += display_mode_element (it, depth, field_width - n, | |
10961 | precision - n, spec); | |
10962 | UNGCPRO; | |
10963 | } | |
10964 | else if (SYMBOLP (car)) | |
a2889657 JB |
10965 | { |
10966 | tem = Fboundp (car); | |
10967 | elt = XCONS (elt)->cdr; | |
e24c997d | 10968 | if (!CONSP (elt)) |
a2889657 JB |
10969 | goto invalid; |
10970 | /* elt is now the cdr, and we know it is a cons cell. | |
10971 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 10972 | if (!NILP (tem)) |
a2889657 JB |
10973 | { |
10974 | tem = Fsymbol_value (car); | |
265a9e55 | 10975 | if (!NILP (tem)) |
a2889657 JB |
10976 | { elt = XCONS (elt)->car; goto tail_recurse; } |
10977 | } | |
10978 | /* Symbol's value is nil (or symbol is unbound) | |
10979 | Get the cddr of the original list | |
10980 | and if possible find the caddr and use that. */ | |
10981 | elt = XCONS (elt)->cdr; | |
265a9e55 | 10982 | if (NILP (elt)) |
a2889657 | 10983 | break; |
e24c997d | 10984 | else if (!CONSP (elt)) |
a2889657 JB |
10985 | goto invalid; |
10986 | elt = XCONS (elt)->car; | |
10987 | goto tail_recurse; | |
10988 | } | |
e24c997d | 10989 | else if (INTEGERP (car)) |
a2889657 JB |
10990 | { |
10991 | register int lim = XINT (car); | |
10992 | elt = XCONS (elt)->cdr; | |
10993 | if (lim < 0) | |
5f5c8ee5 GM |
10994 | { |
10995 | /* Negative int means reduce maximum width. */ | |
10996 | if (precision <= 0) | |
10997 | precision = -lim; | |
10998 | else | |
10999 | precision = min (precision, -lim); | |
11000 | } | |
a2889657 JB |
11001 | else if (lim > 0) |
11002 | { | |
11003 | /* Padding specified. Don't let it be more than | |
11004 | current maximum. */ | |
5f5c8ee5 GM |
11005 | if (precision > 0) |
11006 | lim = min (precision, lim); | |
11007 | ||
a2889657 JB |
11008 | /* If that's more padding than already wanted, queue it. |
11009 | But don't reduce padding already specified even if | |
11010 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 11011 | field_width = max (lim, field_width); |
a2889657 JB |
11012 | } |
11013 | goto tail_recurse; | |
11014 | } | |
e24c997d | 11015 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
11016 | { |
11017 | register int limit = 50; | |
5f5c8ee5 GM |
11018 | /* Limit is to protect against circular lists. */ |
11019 | while (CONSP (elt) | |
11020 | && --limit > 0 | |
11021 | && (precision <= 0 || n < precision)) | |
a2889657 | 11022 | { |
5f5c8ee5 GM |
11023 | n += display_mode_element (it, depth, field_width - n, |
11024 | precision - n, XCONS (elt)->car); | |
a2889657 JB |
11025 | elt = XCONS (elt)->cdr; |
11026 | } | |
11027 | } | |
11028 | } | |
11029 | break; | |
11030 | ||
11031 | default: | |
11032 | invalid: | |
d39b6696 | 11033 | if (frame_title_ptr) |
5f5c8ee5 | 11034 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 11035 | else |
5f5c8ee5 GM |
11036 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
11037 | precision - n, 0, 0); | |
11038 | return n; | |
a2889657 JB |
11039 | } |
11040 | ||
5f5c8ee5 GM |
11041 | /* Pad to FIELD_WIDTH. */ |
11042 | if (field_width > 0 && n < field_width) | |
11043 | { | |
11044 | if (frame_title_ptr) | |
11045 | n += store_frame_title ("", field_width - n, 0); | |
11046 | else | |
11047 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
11048 | 0, 0, 0); | |
11049 | } | |
11050 | ||
11051 | return n; | |
a2889657 | 11052 | } |
5f5c8ee5 GM |
11053 | |
11054 | ||
766525bc RS |
11055 | /* Write a null-terminated, right justified decimal representation of |
11056 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
11057 | ||
11058 | static void | |
11059 | pint2str (buf, width, d) | |
11060 | register char *buf; | |
11061 | register int width; | |
11062 | register int d; | |
11063 | { | |
11064 | register char *p = buf; | |
11065 | ||
11066 | if (d <= 0) | |
5f5c8ee5 | 11067 | *p++ = '0'; |
766525bc | 11068 | else |
5f5c8ee5 | 11069 | { |
766525bc | 11070 | while (d > 0) |
5f5c8ee5 | 11071 | { |
766525bc RS |
11072 | *p++ = d % 10 + '0'; |
11073 | d /= 10; | |
5f5c8ee5 GM |
11074 | } |
11075 | } | |
11076 | ||
11077 | for (width -= (int) (p - buf); width > 0; --width) | |
11078 | *p++ = ' '; | |
766525bc RS |
11079 | *p-- = '\0'; |
11080 | while (p > buf) | |
5f5c8ee5 | 11081 | { |
766525bc RS |
11082 | d = *buf; |
11083 | *buf++ = *p; | |
11084 | *p-- = d; | |
5f5c8ee5 | 11085 | } |
766525bc RS |
11086 | } |
11087 | ||
5f5c8ee5 | 11088 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
11089 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
11090 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
11091 | ||
6693a99a | 11092 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 11093 | |
1c9241f5 KH |
11094 | static char * |
11095 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
11096 | Lisp_Object coding_system; | |
11097 | register char *buf; | |
11098 | int eol_flag; | |
11099 | { | |
1e1078d6 | 11100 | Lisp_Object val; |
916848d8 | 11101 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
11102 | unsigned char *eol_str; |
11103 | int eol_str_len; | |
11104 | /* The EOL conversion we are using. */ | |
11105 | Lisp_Object eoltype; | |
1e1078d6 RS |
11106 | |
11107 | val = coding_system; | |
1c9241f5 KH |
11108 | |
11109 | if (NILP (val)) /* Not yet decided. */ | |
11110 | { | |
916848d8 RS |
11111 | if (multibyte) |
11112 | *buf++ = '-'; | |
21e989e3 | 11113 | if (eol_flag) |
302f2b38 | 11114 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 11115 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
11116 | } |
11117 | else | |
11118 | { | |
1e1078d6 RS |
11119 | Lisp_Object eolvalue; |
11120 | ||
11121 | eolvalue = Fget (coding_system, Qeol_type); | |
11122 | ||
1c9241f5 | 11123 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
11124 | { |
11125 | val = Fget (val, Qcoding_system); | |
11126 | if (NILP (eolvalue)) | |
b070c1d7 | 11127 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
11128 | } |
11129 | ||
916848d8 RS |
11130 | if (multibyte) |
11131 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
11132 | ||
1c9241f5 KH |
11133 | if (eol_flag) |
11134 | { | |
1e1078d6 RS |
11135 | /* The EOL conversion that is normal on this system. */ |
11136 | ||
11137 | if (NILP (eolvalue)) /* Not yet decided. */ | |
11138 | eoltype = eol_mnemonic_undecided; | |
11139 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
11140 | eoltype = eol_mnemonic_undecided; | |
11141 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
11142 | eoltype = (XFASTINT (eolvalue) == 0 | |
11143 | ? eol_mnemonic_unix | |
11144 | : (XFASTINT (eolvalue) == 1 | |
11145 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
11146 | } |
11147 | } | |
5f5c8ee5 | 11148 | |
302f2b38 EZ |
11149 | if (eol_flag) |
11150 | { | |
11151 | /* Mention the EOL conversion if it is not the usual one. */ | |
11152 | if (STRINGP (eoltype)) | |
11153 | { | |
11154 | eol_str = XSTRING (eoltype)->data; | |
11155 | eol_str_len = XSTRING (eoltype)->size; | |
11156 | } | |
f30b3499 KH |
11157 | else if (INTEGERP (eoltype) |
11158 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
11159 | { | |
11160 | int c = XINT (eoltype); | |
11161 | unsigned char work[4]; | |
11162 | ||
11163 | eol_str_len = CHAR_STRING (XINT (eoltype), work, eol_str); | |
11164 | } | |
302f2b38 EZ |
11165 | else |
11166 | { | |
11167 | eol_str = invalid_eol_type; | |
11168 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 11169 | } |
f30b3499 | 11170 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 11171 | buf += eol_str_len; |
1c9241f5 | 11172 | } |
302f2b38 | 11173 | |
1c9241f5 KH |
11174 | return buf; |
11175 | } | |
11176 | ||
a2889657 | 11177 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
11178 | generated by character C. PRECISION >= 0 means don't return a |
11179 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
11180 | string returned with spaces to that value. */ | |
a2889657 | 11181 | |
11e82b76 JB |
11182 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
11183 | ||
a2889657 | 11184 | static char * |
5f5c8ee5 | 11185 | decode_mode_spec (w, c, field_width, precision) |
a2889657 JB |
11186 | struct window *w; |
11187 | register char c; | |
5f5c8ee5 | 11188 | int field_width, precision; |
a2889657 | 11189 | { |
0b67772d | 11190 | Lisp_Object obj; |
5f5c8ee5 GM |
11191 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11192 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 11193 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 11194 | |
0b67772d | 11195 | obj = Qnil; |
a2889657 JB |
11196 | |
11197 | switch (c) | |
11198 | { | |
1af9f229 RS |
11199 | case '*': |
11200 | if (!NILP (b->read_only)) | |
11201 | return "%"; | |
11202 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11203 | return "*"; | |
11204 | return "-"; | |
11205 | ||
11206 | case '+': | |
11207 | /* This differs from %* only for a modified read-only buffer. */ | |
11208 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11209 | return "*"; | |
11210 | if (!NILP (b->read_only)) | |
11211 | return "%"; | |
11212 | return "-"; | |
11213 | ||
11214 | case '&': | |
11215 | /* This differs from %* in ignoring read-only-ness. */ | |
11216 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11217 | return "*"; | |
11218 | return "-"; | |
11219 | ||
11220 | case '%': | |
11221 | return "%"; | |
11222 | ||
11223 | case '[': | |
11224 | { | |
11225 | int i; | |
11226 | char *p; | |
11227 | ||
11228 | if (command_loop_level > 5) | |
11229 | return "[[[... "; | |
11230 | p = decode_mode_spec_buf; | |
11231 | for (i = 0; i < command_loop_level; i++) | |
11232 | *p++ = '['; | |
11233 | *p = 0; | |
11234 | return decode_mode_spec_buf; | |
11235 | } | |
11236 | ||
11237 | case ']': | |
11238 | { | |
11239 | int i; | |
11240 | char *p; | |
11241 | ||
11242 | if (command_loop_level > 5) | |
11243 | return " ...]]]"; | |
11244 | p = decode_mode_spec_buf; | |
11245 | for (i = 0; i < command_loop_level; i++) | |
11246 | *p++ = ']'; | |
11247 | *p = 0; | |
11248 | return decode_mode_spec_buf; | |
11249 | } | |
11250 | ||
11251 | case '-': | |
11252 | { | |
1af9f229 | 11253 | register int i; |
5f5c8ee5 GM |
11254 | |
11255 | /* Let lots_of_dashes be a string of infinite length. */ | |
11256 | if (field_width <= 0 | |
11257 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 11258 | { |
5f5c8ee5 GM |
11259 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
11260 | decode_mode_spec_buf[i] = '-'; | |
11261 | decode_mode_spec_buf[i] = '\0'; | |
11262 | return decode_mode_spec_buf; | |
1af9f229 | 11263 | } |
5f5c8ee5 GM |
11264 | else |
11265 | return lots_of_dashes; | |
1af9f229 RS |
11266 | } |
11267 | ||
a2889657 | 11268 | case 'b': |
d39b6696 | 11269 | obj = b->name; |
a2889657 JB |
11270 | break; |
11271 | ||
1af9f229 RS |
11272 | case 'c': |
11273 | { | |
11274 | int col = current_column (); | |
11275 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 11276 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
11277 | return decode_mode_spec_buf; |
11278 | } | |
11279 | ||
11280 | case 'F': | |
11281 | /* %F displays the frame name. */ | |
5f5c8ee5 | 11282 | if (!NILP (f->title)) |
95184b48 | 11283 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 11284 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 11285 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 11286 | return "Emacs"; |
1af9f229 | 11287 | |
a2889657 | 11288 | case 'f': |
d39b6696 | 11289 | obj = b->filename; |
a2889657 JB |
11290 | break; |
11291 | ||
aa6d10fa RS |
11292 | case 'l': |
11293 | { | |
12adba34 RS |
11294 | int startpos = XMARKER (w->start)->charpos; |
11295 | int startpos_byte = marker_byte_position (w->start); | |
11296 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 11297 | int nlines, junk; |
aa6d10fa RS |
11298 | int height = XFASTINT (w->height); |
11299 | ||
11300 | /* If we decided that this buffer isn't suitable for line numbers, | |
11301 | don't forget that too fast. */ | |
11302 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 11303 | goto no_value; |
5300fd39 RS |
11304 | /* But do forget it, if the window shows a different buffer now. */ |
11305 | else if (BUFFERP (w->base_line_pos)) | |
11306 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
11307 | |
11308 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 11309 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
11310 | { |
11311 | w->base_line_pos = Qnil; | |
11312 | w->base_line_number = Qnil; | |
766525bc | 11313 | goto no_value; |
aa6d10fa RS |
11314 | } |
11315 | ||
11316 | if (!NILP (w->base_line_number) | |
11317 | && !NILP (w->base_line_pos) | |
12adba34 | 11318 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
11319 | { |
11320 | line = XFASTINT (w->base_line_number); | |
11321 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 11322 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
11323 | } |
11324 | else | |
11325 | { | |
11326 | line = 1; | |
d39b6696 | 11327 | linepos = BUF_BEGV (b); |
12adba34 | 11328 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
11329 | } |
11330 | ||
11331 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
11332 | nlines = display_count_lines (linepos, linepos_byte, |
11333 | startpos_byte, | |
11334 | startpos, &junk); | |
aa6d10fa RS |
11335 | |
11336 | topline = nlines + line; | |
11337 | ||
11338 | /* Determine a new base line, if the old one is too close | |
11339 | or too far away, or if we did not have one. | |
11340 | "Too close" means it's plausible a scroll-down would | |
11341 | go back past it. */ | |
d39b6696 | 11342 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 11343 | { |
c2213350 KH |
11344 | XSETFASTINT (w->base_line_number, topline); |
11345 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
11346 | } |
11347 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 11348 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 11349 | { |
d39b6696 | 11350 | int limit = BUF_BEGV (b); |
12adba34 | 11351 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 11352 | int position; |
5d121aec | 11353 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
11354 | |
11355 | if (startpos - distance > limit) | |
12adba34 RS |
11356 | { |
11357 | limit = startpos - distance; | |
11358 | limit_byte = CHAR_TO_BYTE (limit); | |
11359 | } | |
aa6d10fa | 11360 | |
12adba34 RS |
11361 | nlines = display_count_lines (startpos, startpos_byte, |
11362 | limit_byte, | |
11363 | - (height * 2 + 30), | |
aa6d10fa RS |
11364 | &position); |
11365 | /* If we couldn't find the lines we wanted within | |
5d121aec | 11366 | line_number_display_limit_width chars per line, |
aa6d10fa | 11367 | give up on line numbers for this window. */ |
12adba34 | 11368 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
11369 | { |
11370 | w->base_line_pos = w->buffer; | |
11371 | w->base_line_number = Qnil; | |
766525bc | 11372 | goto no_value; |
aa6d10fa RS |
11373 | } |
11374 | ||
c2213350 | 11375 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 11376 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
11377 | } |
11378 | ||
11379 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
11380 | nlines = display_count_lines (startpos, startpos_byte, |
11381 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
11382 | |
11383 | /* Record that we did display the line number. */ | |
11384 | line_number_displayed = 1; | |
11385 | ||
11386 | /* Make the string to show. */ | |
5f5c8ee5 | 11387 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 11388 | return decode_mode_spec_buf; |
766525bc RS |
11389 | no_value: |
11390 | { | |
11391 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
11392 | int pad = field_width - 2; |
11393 | while (pad-- > 0) | |
11394 | *p++ = ' '; | |
11395 | *p++ = '?'; | |
11396 | *p = '?'; | |
766525bc RS |
11397 | return decode_mode_spec_buf; |
11398 | } | |
aa6d10fa RS |
11399 | } |
11400 | break; | |
11401 | ||
a2889657 | 11402 | case 'm': |
d39b6696 | 11403 | obj = b->mode_name; |
a2889657 JB |
11404 | break; |
11405 | ||
11406 | case 'n': | |
d39b6696 | 11407 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
11408 | return " Narrow"; |
11409 | break; | |
11410 | ||
a2889657 JB |
11411 | case 'p': |
11412 | { | |
11413 | int pos = marker_position (w->start); | |
d39b6696 | 11414 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 11415 | |
d39b6696 | 11416 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 11417 | { |
d39b6696 | 11418 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
11419 | return "All"; |
11420 | else | |
11421 | return "Bottom"; | |
11422 | } | |
d39b6696 | 11423 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
11424 | return "Top"; |
11425 | else | |
11426 | { | |
3c7d31b9 RS |
11427 | if (total > 1000000) |
11428 | /* Do it differently for a large value, to avoid overflow. */ | |
11429 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
11430 | else | |
11431 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
11432 | /* We can't normally display a 3-digit number, |
11433 | so get us a 2-digit number that is close. */ | |
11434 | if (total == 100) | |
11435 | total = 99; | |
11436 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
11437 | return decode_mode_spec_buf; | |
11438 | } | |
11439 | } | |
11440 | ||
8ffcb79f RS |
11441 | /* Display percentage of size above the bottom of the screen. */ |
11442 | case 'P': | |
11443 | { | |
11444 | int toppos = marker_position (w->start); | |
d39b6696 KH |
11445 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
11446 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 11447 | |
d39b6696 | 11448 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 11449 | { |
d39b6696 | 11450 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
11451 | return "All"; |
11452 | else | |
11453 | return "Bottom"; | |
11454 | } | |
11455 | else | |
11456 | { | |
3c7d31b9 RS |
11457 | if (total > 1000000) |
11458 | /* Do it differently for a large value, to avoid overflow. */ | |
11459 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
11460 | else | |
11461 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
11462 | /* We can't normally display a 3-digit number, |
11463 | so get us a 2-digit number that is close. */ | |
11464 | if (total == 100) | |
11465 | total = 99; | |
d39b6696 | 11466 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
11467 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
11468 | else | |
11469 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
11470 | return decode_mode_spec_buf; | |
11471 | } | |
11472 | } | |
11473 | ||
1af9f229 RS |
11474 | case 's': |
11475 | /* status of process */ | |
11476 | obj = Fget_buffer_process (w->buffer); | |
11477 | if (NILP (obj)) | |
11478 | return "no process"; | |
11479 | #ifdef subprocesses | |
11480 | obj = Fsymbol_name (Fprocess_status (obj)); | |
11481 | #endif | |
11482 | break; | |
d39b6696 | 11483 | |
1af9f229 RS |
11484 | case 't': /* indicate TEXT or BINARY */ |
11485 | #ifdef MODE_LINE_BINARY_TEXT | |
11486 | return MODE_LINE_BINARY_TEXT (b); | |
11487 | #else | |
11488 | return "T"; | |
11489 | #endif | |
1c9241f5 KH |
11490 | |
11491 | case 'z': | |
11492 | /* coding-system (not including end-of-line format) */ | |
11493 | case 'Z': | |
11494 | /* coding-system (including end-of-line type) */ | |
11495 | { | |
11496 | int eol_flag = (c == 'Z'); | |
539b4d41 | 11497 | char *p = decode_mode_spec_buf; |
1c9241f5 | 11498 | |
d30e754b | 11499 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 11500 | { |
11c52c4f RS |
11501 | /* No need to mention EOL here--the terminal never needs |
11502 | to do EOL conversion. */ | |
11503 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
11504 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 11505 | } |
f13c925f | 11506 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 11507 | p, eol_flag); |
f13c925f | 11508 | |
11c52c4f | 11509 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
11510 | #ifdef subprocesses |
11511 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
11512 | if (PROCESSP (obj)) | |
11513 | { | |
11514 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
11515 | p, eol_flag); | |
11516 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
11517 | p, eol_flag); | |
11518 | } | |
11519 | #endif /* subprocesses */ | |
11c52c4f | 11520 | #endif /* 0 */ |
1c9241f5 KH |
11521 | *p = 0; |
11522 | return decode_mode_spec_buf; | |
11523 | } | |
a2889657 | 11524 | } |
d39b6696 | 11525 | |
e24c997d | 11526 | if (STRINGP (obj)) |
a2889657 JB |
11527 | return (char *) XSTRING (obj)->data; |
11528 | else | |
11529 | return ""; | |
11530 | } | |
5f5c8ee5 GM |
11531 | |
11532 | ||
12adba34 RS |
11533 | /* Count up to COUNT lines starting from START / START_BYTE. |
11534 | But don't go beyond LIMIT_BYTE. | |
11535 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 11536 | |
12adba34 | 11537 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
11538 | |
11539 | static int | |
12adba34 RS |
11540 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
11541 | int start, start_byte, limit_byte, count; | |
11542 | int *byte_pos_ptr; | |
59b49f63 | 11543 | { |
59b49f63 RS |
11544 | register unsigned char *cursor; |
11545 | unsigned char *base; | |
11546 | ||
11547 | register int ceiling; | |
11548 | register unsigned char *ceiling_addr; | |
12adba34 | 11549 | int orig_count = count; |
59b49f63 RS |
11550 | |
11551 | /* If we are not in selective display mode, | |
11552 | check only for newlines. */ | |
12adba34 RS |
11553 | int selective_display = (!NILP (current_buffer->selective_display) |
11554 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
11555 | |
11556 | if (count > 0) | |
12adba34 RS |
11557 | { |
11558 | while (start_byte < limit_byte) | |
11559 | { | |
11560 | ceiling = BUFFER_CEILING_OF (start_byte); | |
11561 | ceiling = min (limit_byte - 1, ceiling); | |
11562 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
11563 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
11564 | while (1) | |
11565 | { | |
11566 | if (selective_display) | |
11567 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
11568 | ; | |
11569 | else | |
11570 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
11571 | ; | |
11572 | ||
11573 | if (cursor != ceiling_addr) | |
11574 | { | |
11575 | if (--count == 0) | |
11576 | { | |
11577 | start_byte += cursor - base + 1; | |
11578 | *byte_pos_ptr = start_byte; | |
11579 | return orig_count; | |
11580 | } | |
11581 | else | |
11582 | if (++cursor == ceiling_addr) | |
11583 | break; | |
11584 | } | |
11585 | else | |
11586 | break; | |
11587 | } | |
11588 | start_byte += cursor - base; | |
11589 | } | |
11590 | } | |
59b49f63 RS |
11591 | else |
11592 | { | |
12adba34 RS |
11593 | while (start_byte > limit_byte) |
11594 | { | |
11595 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
11596 | ceiling = max (limit_byte, ceiling); | |
11597 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
11598 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
11599 | while (1) |
11600 | { | |
12adba34 RS |
11601 | if (selective_display) |
11602 | while (--cursor != ceiling_addr | |
11603 | && *cursor != '\n' && *cursor != 015) | |
11604 | ; | |
11605 | else | |
11606 | while (--cursor != ceiling_addr && *cursor != '\n') | |
11607 | ; | |
11608 | ||
59b49f63 RS |
11609 | if (cursor != ceiling_addr) |
11610 | { | |
11611 | if (++count == 0) | |
11612 | { | |
12adba34 RS |
11613 | start_byte += cursor - base + 1; |
11614 | *byte_pos_ptr = start_byte; | |
11615 | /* When scanning backwards, we should | |
11616 | not count the newline posterior to which we stop. */ | |
11617 | return - orig_count - 1; | |
59b49f63 RS |
11618 | } |
11619 | } | |
11620 | else | |
11621 | break; | |
11622 | } | |
12adba34 RS |
11623 | /* Here we add 1 to compensate for the last decrement |
11624 | of CURSOR, which took it past the valid range. */ | |
11625 | start_byte += cursor - base + 1; | |
59b49f63 RS |
11626 | } |
11627 | } | |
11628 | ||
12adba34 | 11629 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 11630 | |
12adba34 RS |
11631 | if (count < 0) |
11632 | return - orig_count + count; | |
11633 | return orig_count - count; | |
aa6d10fa | 11634 | |
12adba34 | 11635 | } |
a2889657 | 11636 | |
a2889657 | 11637 | |
5f5c8ee5 GM |
11638 | \f |
11639 | /*********************************************************************** | |
11640 | Displaying strings | |
11641 | ***********************************************************************/ | |
278feba9 | 11642 | |
5f5c8ee5 | 11643 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 11644 | |
5f5c8ee5 GM |
11645 | If STRING is non-null, display that C string. Otherwise, the Lisp |
11646 | string LISP_STRING is displayed. | |
a2889657 | 11647 | |
5f5c8ee5 GM |
11648 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
11649 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
11650 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 11651 | |
5f5c8ee5 GM |
11652 | Display the string in the environment given by IT, but use the |
11653 | standard display table, temporarily. | |
a3788d53 | 11654 | |
5f5c8ee5 GM |
11655 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
11656 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
11657 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
11658 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
11659 | ||
11660 | PRECISION is the maximum number of characters to output from | |
11661 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 11662 | |
5f5c8ee5 | 11663 | This is roughly equivalent to printf format specifiers: |
a2889657 | 11664 | |
5f5c8ee5 GM |
11665 | FIELD_WIDTH PRECISION PRINTF |
11666 | ---------------------------------------- | |
11667 | -1 -1 %s | |
11668 | -1 10 %.10s | |
11669 | 10 -1 %10s | |
11670 | 20 10 %20.10s | |
a2889657 | 11671 | |
5f5c8ee5 GM |
11672 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
11673 | display them, and < 0 means obey the current buffer's value of | |
11674 | enable_multibyte_characters. | |
278feba9 | 11675 | |
5f5c8ee5 | 11676 | Value is the number of glyphs produced. */ |
b1d1124b | 11677 | |
5f5c8ee5 GM |
11678 | static int |
11679 | display_string (string, lisp_string, face_string, face_string_pos, | |
11680 | start, it, field_width, precision, max_x, multibyte) | |
11681 | unsigned char *string; | |
11682 | Lisp_Object lisp_string; | |
11683 | int start; | |
11684 | struct it *it; | |
11685 | int field_width, precision, max_x; | |
11686 | int multibyte; | |
11687 | { | |
11688 | int hpos_at_start = it->hpos; | |
11689 | int saved_face_id = it->face_id; | |
11690 | struct glyph_row *row = it->glyph_row; | |
11691 | ||
11692 | /* Initialize the iterator IT for iteration over STRING beginning | |
11693 | with index START. We assume that IT may be modified here (which | |
11694 | means that display_line has to do something when displaying a | |
11695 | mini-buffer prompt, which it does). */ | |
11696 | reseat_to_string (it, string, lisp_string, start, | |
11697 | precision, field_width, multibyte); | |
11698 | ||
11699 | /* If displaying STRING, set up the face of the iterator | |
11700 | from LISP_STRING, if that's given. */ | |
11701 | if (STRINGP (face_string)) | |
11702 | { | |
11703 | int endptr; | |
11704 | struct face *face; | |
11705 | ||
11706 | it->face_id | |
11707 | = face_at_string_position (it->w, face_string, face_string_pos, | |
11708 | 0, it->region_beg_charpos, | |
11709 | it->region_end_charpos, | |
11710 | &endptr, it->base_face_id); | |
11711 | face = FACE_FROM_ID (it->f, it->face_id); | |
11712 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 11713 | } |
a2889657 | 11714 | |
5f5c8ee5 GM |
11715 | /* Set max_x to the maximum allowed X position. Don't let it go |
11716 | beyond the right edge of the window. */ | |
11717 | if (max_x <= 0) | |
11718 | max_x = it->last_visible_x; | |
11719 | else | |
11720 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 11721 | |
5f5c8ee5 GM |
11722 | /* Skip over display elements that are not visible. because IT->w is |
11723 | hscrolled. */ | |
11724 | if (it->current_x < it->first_visible_x) | |
11725 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
11726 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 11727 | |
5f5c8ee5 GM |
11728 | row->ascent = it->max_ascent; |
11729 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
11730 | row->phys_ascent = it->max_phys_ascent; |
11731 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 11732 | |
5f5c8ee5 GM |
11733 | /* This condition is for the case that we are called with current_x |
11734 | past last_visible_x. */ | |
11735 | while (it->current_x < max_x) | |
a2889657 | 11736 | { |
5f5c8ee5 | 11737 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 11738 | |
5f5c8ee5 GM |
11739 | /* Get the next display element. */ |
11740 | if (!get_next_display_element (it)) | |
90adcf20 | 11741 | break; |
1c9241f5 | 11742 | |
5f5c8ee5 GM |
11743 | /* Produce glyphs. */ |
11744 | x_before = it->current_x; | |
11745 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
11746 | PRODUCE_GLYPHS (it); | |
90adcf20 | 11747 | |
5f5c8ee5 GM |
11748 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
11749 | i = 0; | |
11750 | x = x_before; | |
11751 | while (i < nglyphs) | |
a2889657 | 11752 | { |
5f5c8ee5 GM |
11753 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
11754 | ||
11755 | if (!it->truncate_lines_p | |
11756 | && x + glyph->pixel_width > max_x) | |
11757 | { | |
11758 | /* End of continued line or max_x reached. */ | |
11759 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
11760 | it->current_x = x; | |
11761 | break; | |
11762 | } | |
11763 | else if (x + glyph->pixel_width > it->first_visible_x) | |
11764 | { | |
11765 | /* Glyph is at least partially visible. */ | |
11766 | ++it->hpos; | |
11767 | if (x < it->first_visible_x) | |
11768 | it->glyph_row->x = x - it->first_visible_x; | |
11769 | } | |
11770 | else | |
a2889657 | 11771 | { |
5f5c8ee5 GM |
11772 | /* Glyph is off the left margin of the display area. |
11773 | Should not happen. */ | |
11774 | abort (); | |
a2889657 | 11775 | } |
5f5c8ee5 GM |
11776 | |
11777 | row->ascent = max (row->ascent, it->max_ascent); | |
11778 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11779 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11780 | row->phys_height = max (row->phys_height, | |
11781 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11782 | x += glyph->pixel_width; |
11783 | ++i; | |
a2889657 | 11784 | } |
5f5c8ee5 GM |
11785 | |
11786 | /* Stop if max_x reached. */ | |
11787 | if (i < nglyphs) | |
11788 | break; | |
11789 | ||
11790 | /* Stop at line ends. */ | |
11791 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 11792 | { |
5f5c8ee5 GM |
11793 | it->continuation_lines_width = 0; |
11794 | break; | |
a2889657 | 11795 | } |
1c9241f5 | 11796 | |
5f5c8ee5 | 11797 | set_iterator_to_next (it); |
a688bb24 | 11798 | |
5f5c8ee5 GM |
11799 | /* Stop if truncating at the right edge. */ |
11800 | if (it->truncate_lines_p | |
11801 | && it->current_x >= it->last_visible_x) | |
11802 | { | |
11803 | /* Add truncation mark, but don't do it if the line is | |
11804 | truncated at a padding space. */ | |
11805 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 11806 | { |
5f5c8ee5 GM |
11807 | if (!FRAME_WINDOW_P (it->f)) |
11808 | produce_special_glyphs (it, IT_TRUNCATION); | |
11809 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 11810 | } |
5f5c8ee5 | 11811 | break; |
1c9241f5 | 11812 | } |
a2889657 JB |
11813 | } |
11814 | ||
5f5c8ee5 GM |
11815 | /* Maybe insert a truncation at the left. */ |
11816 | if (it->first_visible_x | |
11817 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 11818 | { |
5f5c8ee5 GM |
11819 | if (!FRAME_WINDOW_P (it->f)) |
11820 | insert_left_trunc_glyphs (it); | |
11821 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
11822 | } |
11823 | ||
5f5c8ee5 GM |
11824 | it->face_id = saved_face_id; |
11825 | ||
11826 | /* Value is number of columns displayed. */ | |
11827 | return it->hpos - hpos_at_start; | |
11828 | } | |
a2889657 | 11829 | |
a2889657 | 11830 | |
a2889657 | 11831 | \f |
5f5c8ee5 GM |
11832 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
11833 | appears as an element of LIST or as the car of an element of LIST. | |
11834 | If PROPVAL is a list, compare each element against LIST in that | |
11835 | way, and return 1 if any element of PROPVAL is found in LIST. | |
11836 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
11837 | |
11838 | int | |
11839 | invisible_p (propval, list) | |
11840 | register Lisp_Object propval; | |
11841 | Lisp_Object list; | |
11842 | { | |
af460d46 RS |
11843 | register Lisp_Object tail, proptail; |
11844 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
11845 | { |
11846 | register Lisp_Object tem; | |
af460d46 | 11847 | tem = XCONS (tail)->car; |
642eefc6 RS |
11848 | if (EQ (propval, tem)) |
11849 | return 1; | |
11850 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) | |
11851 | return 1; | |
11852 | } | |
af460d46 RS |
11853 | if (CONSP (propval)) |
11854 | for (proptail = propval; CONSP (proptail); | |
11855 | proptail = XCONS (proptail)->cdr) | |
11856 | { | |
11857 | Lisp_Object propelt; | |
11858 | propelt = XCONS (proptail)->car; | |
11859 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
11860 | { | |
11861 | register Lisp_Object tem; | |
11862 | tem = XCONS (tail)->car; | |
11863 | if (EQ (propelt, tem)) | |
11864 | return 1; | |
11865 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
11866 | return 1; | |
11867 | } | |
11868 | } | |
642eefc6 RS |
11869 | return 0; |
11870 | } | |
11871 | ||
5f5c8ee5 GM |
11872 | |
11873 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
11874 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
11875 | each element of PROPVAL in that way, and the first time some | |
11876 | element is found, return 1 if the cdr of that element is non-nil. | |
11877 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
11878 | |
11879 | int | |
11880 | invisible_ellipsis_p (propval, list) | |
11881 | register Lisp_Object propval; | |
11882 | Lisp_Object list; | |
11883 | { | |
af460d46 RS |
11884 | register Lisp_Object tail, proptail; |
11885 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
11886 | { |
11887 | register Lisp_Object tem; | |
af460d46 | 11888 | tem = XCONS (tail)->car; |
642eefc6 RS |
11889 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) |
11890 | return ! NILP (XCONS (tem)->cdr); | |
11891 | } | |
af460d46 RS |
11892 | if (CONSP (propval)) |
11893 | for (proptail = propval; CONSP (proptail); | |
11894 | proptail = XCONS (proptail)->cdr) | |
11895 | { | |
11896 | Lisp_Object propelt; | |
11897 | propelt = XCONS (proptail)->car; | |
11898 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
11899 | { | |
11900 | register Lisp_Object tem; | |
11901 | tem = XCONS (tail)->car; | |
11902 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
11903 | return ! NILP (XCONS (tem)->cdr); | |
11904 | } | |
11905 | } | |
642eefc6 RS |
11906 | return 0; |
11907 | } | |
5f5c8ee5 GM |
11908 | |
11909 | ||
642eefc6 | 11910 | \f |
5f5c8ee5 GM |
11911 | /*********************************************************************** |
11912 | Initialization | |
11913 | ***********************************************************************/ | |
11914 | ||
a2889657 JB |
11915 | void |
11916 | syms_of_xdisp () | |
11917 | { | |
5f5c8ee5 GM |
11918 | echo_area_message = previous_echo_area_message = Qnil; |
11919 | staticpro (&echo_area_message); | |
11920 | staticpro (&previous_echo_area_message); | |
11921 | ||
735c094c KH |
11922 | staticpro (&Qinhibit_redisplay); |
11923 | Qinhibit_redisplay = intern ("inhibit-redisplay"); | |
11924 | ||
5f5c8ee5 GM |
11925 | #if GLYPH_DEBUG |
11926 | defsubr (&Sdump_glyph_matrix); | |
11927 | defsubr (&Sdump_glyph_row); | |
11928 | defsubr (&Sdump_toolbar_row); | |
11929 | defsubr (&Strace_redisplay_toggle); | |
11930 | #endif | |
11931 | ||
cf074754 RS |
11932 | staticpro (&Qmenu_bar_update_hook); |
11933 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
11934 | ||
d46fb96a | 11935 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 11936 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 11937 | |
399164b4 KH |
11938 | staticpro (&Qoverriding_local_map); |
11939 | Qoverriding_local_map = intern ("overriding-local-map"); | |
11940 | ||
75c43375 RS |
11941 | staticpro (&Qwindow_scroll_functions); |
11942 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
11943 | ||
e0bfbde6 RS |
11944 | staticpro (&Qredisplay_end_trigger_functions); |
11945 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 11946 | |
2e54982e RS |
11947 | staticpro (&Qinhibit_point_motion_hooks); |
11948 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
11949 | ||
5f5c8ee5 GM |
11950 | staticpro (&Qdisplay); |
11951 | Qdisplay = intern ("display"); | |
11952 | staticpro (&Qleft_margin); | |
11953 | Qspace_width = intern ("space-width"); | |
11954 | staticpro (&Qspace_width); | |
11955 | Qheight = intern ("height"); | |
11956 | staticpro (&Qheight); | |
11957 | Qraise = intern ("raise"); | |
11958 | staticpro (&Qraise); | |
11959 | Qspace = intern ("space"); | |
11960 | staticpro (&Qspace); | |
11961 | Qleft_margin = intern ("left-margin"); | |
11962 | staticpro (&Qright_margin); | |
11963 | Qright_margin = intern ("right-margin"); | |
11964 | Qalign_to = intern ("align-to"); | |
11965 | staticpro (&Qalign_to); | |
11966 | QCalign_to = intern (":align-to"); | |
11967 | staticpro (&QCalign_to); | |
11968 | Qwidth = intern ("width"); | |
11969 | staticpro (&Qwidth); | |
11970 | Qrelative_width = intern ("relative-width"); | |
11971 | staticpro (&Qrelative_width); | |
11972 | QCrelative_width = intern (":relative-width"); | |
11973 | staticpro (&QCrelative_width); | |
11974 | QCrelative_height = intern (":relative-height"); | |
11975 | staticpro (&QCrelative_height); | |
11976 | QCeval = intern (":eval"); | |
11977 | staticpro (&QCeval); | |
11978 | QCwhen = intern (":when"); | |
11979 | staticpro (&QCwhen); | |
11980 | Qfontified = intern ("fontified"); | |
11981 | staticpro (&Qfontified); | |
11982 | Qfontification_functions = intern ("fontification-functions"); | |
11983 | staticpro (&Qfontification_functions); | |
11984 | Qshow_trailing_whitespace = intern ("show-trailing-whitespace"); | |
11985 | staticpro (&Qshow_trailing_whitespace); | |
11986 | Qtrailing_whitespace = intern ("trailing-whitespace"); | |
11987 | staticpro (&Qtrailing_whitespace); | |
11988 | Qimage = intern ("image"); | |
11989 | staticpro (&Qimage); | |
11990 | ||
a2889657 JB |
11991 | staticpro (&last_arrow_position); |
11992 | staticpro (&last_arrow_string); | |
11993 | last_arrow_position = Qnil; | |
11994 | last_arrow_string = Qnil; | |
11995 | ||
735c094c KH |
11996 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
11997 | "Non-nil means don't actually do any redisplay.\n\ | |
11998 | This is used for internal purposes."); | |
11999 | Vinhibit_redisplay = Qnil; | |
12000 | ||
a2889657 | 12001 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 12002 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
12003 | Vglobal_mode_string = Qnil; |
12004 | ||
12005 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
12006 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
12007 | This must be the beginning of a line in order to work.\n\ | |
12008 | See also `overlay-arrow-string'."); | |
12009 | Voverlay_arrow_position = Qnil; | |
12010 | ||
12011 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
12012 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
12013 | Voverlay_arrow_string = Qnil; | |
12014 | ||
12015 | DEFVAR_INT ("scroll-step", &scroll_step, | |
12016 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
12017 | If that fails to bring point back on frame, point is centered instead.\n\ |
12018 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 12019 | |
0789adb2 RS |
12020 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
12021 | "*Scroll up to this many lines, to bring point back on screen."); | |
12022 | scroll_conservatively = 0; | |
12023 | ||
9afd2168 RS |
12024 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
12025 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
12026 | Recenter the window whenever point gets within this many lines\n\ | |
12027 | of the top or bottom of the window."); | |
12028 | scroll_margin = 0; | |
12029 | ||
5f5c8ee5 | 12030 | #if GLYPH_DEBUG |
a2889657 | 12031 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 12032 | #endif |
a2889657 JB |
12033 | |
12034 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
12035 | &truncate_partial_width_windows, | |
44fa5b1e | 12036 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
12037 | truncate_partial_width_windows = 1; |
12038 | ||
12039 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
12040 | "*Non-nil means use inverse video for the mode line."); | |
12041 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
12042 | |
12043 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5f5c8ee5 | 12044 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 12045 | If the buffer is bigger than this, the line number does not appear\n\ |
9f027393 | 12046 | in the mode line."); |
aa6d10fa | 12047 | line_number_display_limit = 1000000; |
fba9ce76 | 12048 | |
5d121aec KH |
12049 | DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width, |
12050 | "*Maximum line width (in characters) for line number display.\n\ | |
12051 | If the average length of the lines near point is bigger than this, then the\n\ | |
12052 | line number may be omitted from the mode line."); | |
12053 | line_number_display_limit_width = 200; | |
12054 | ||
fba9ce76 RS |
12055 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
12056 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 12057 | highlight_nonselected_windows = 0; |
d39b6696 KH |
12058 | |
12059 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
12060 | "Non-nil if more than one frame is visible on this display.\n\ |
12061 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
12062 | This variable is not guaranteed to be accurate except while processing\n\ |
12063 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
12064 | |
12065 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 12066 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
12067 | \(Assuming the window manager supports this feature.)\n\ |
12068 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12069 | and is used only on frames for which no explicit name has been set\n\ | |
12070 | \(see `modify-frame-parameters')."); | |
12071 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 12072 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
12073 | \(Assuming the window manager supports this feature.)\n\ |
12074 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12075 | and is used only on frames for which no explicit name has been set\n\ | |
12076 | \(see `modify-frame-parameters')."); | |
12077 | Vicon_title_format | |
12078 | = Vframe_title_format | |
12079 | = Fcons (intern ("multiple-frames"), | |
12080 | Fcons (build_string ("%b"), | |
12081 | Fcons (Fcons (build_string (""), | |
12082 | Fcons (intern ("invocation-name"), | |
12083 | Fcons (build_string ("@"), | |
12084 | Fcons (intern ("system-name"), | |
12085 | Qnil)))), | |
12086 | Qnil))); | |
5992c4f7 KH |
12087 | |
12088 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
12089 | "Maximum number of lines to keep in the message log buffer.\n\ | |
12090 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
12091 | the buffer when it becomes large."); | |
12092 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
12093 | |
12094 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
12095 | "Functions called before redisplay, if window sizes have changed.\n\ | |
12096 | The value should be a list of functions that take one argument.\n\ | |
12097 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
12098 | size since the last redisplay, or have been split or deleted,\n\ | |
12099 | all the functions in the list are called, with the frame as argument."); | |
12100 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
12101 | |
12102 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 12103 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 12104 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
12105 | and its new display-start position. Note that the value of `window-end'\n\ |
12106 | is not valid when these functions are called."); | |
75c43375 | 12107 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 GM |
12108 | |
12109 | DEFVAR_BOOL ("auto-resize-toolbars", &auto_resize_toolbars_p, | |
12110 | "*Non-nil means automatically resize toolbars.\n\ | |
12111 | This increases a toolbar's height if not all toolbar items are visible.\n\ | |
12112 | It decreases a toolbar's height when it would display blank lines\n\ | |
12113 | otherwise."); | |
12114 | auto_resize_toolbars_p = 1; | |
12115 | ||
12116 | DEFVAR_BOOL ("auto-raise-toolbar-buttons", &auto_raise_toolbar_buttons_p, | |
12117 | "*Non-nil means raise toolbar buttons when the mouse moves over them."); | |
12118 | auto_raise_toolbar_buttons_p = 1; | |
12119 | ||
12120 | DEFVAR_INT ("toolbar-button-margin", &toolbar_button_margin, | |
12121 | "*Margin around toolbar buttons in pixels."); | |
12122 | toolbar_button_margin = 1; | |
12123 | ||
12124 | DEFVAR_INT ("toolbar-button-relief", &toolbar_button_relief, | |
12125 | "Relief thickness of toolbar buttons."); | |
12126 | toolbar_button_relief = 3; | |
12127 | ||
12128 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
12129 | "List of functions to call to fontify regions of text.\n\ | |
12130 | Each function is called with one argument POS. Functions must\n\ | |
12131 | fontify a region starting at POS in the current buffer, and give\n\ | |
12132 | fontified regions the property `fontified'.\n\ | |
12133 | This variable automatically becomes buffer-local when set."); | |
12134 | Vfontification_functions = Qnil; | |
12135 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
12136 | |
12137 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
12138 | &unibyte_display_via_language_environment, |
12139 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
12140 | Specifically this means that unibyte non-ASCII characters\n\ |
12141 | are displayed by converting them to the equivalent multibyte characters\n\ | |
12142 | according to the current language environment. As a result, they are\n\ | |
12143 | displayed according to the current fontset."); | |
12144 | unibyte_display_via_language_environment = 0; | |
a2889657 JB |
12145 | } |
12146 | ||
5f5c8ee5 GM |
12147 | |
12148 | /* Initialize this module when Emacs starts. */ | |
12149 | ||
dfcf069d | 12150 | void |
a2889657 JB |
12151 | init_xdisp () |
12152 | { | |
12153 | Lisp_Object root_window; | |
5f5c8ee5 | 12154 | struct window *mini_w; |
a2889657 | 12155 | |
5f5c8ee5 | 12156 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
12157 | |
12158 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 12159 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
12160 | |
12161 | echo_area_glyphs = 0; | |
12162 | previous_echo_glyphs = 0; | |
5f5c8ee5 | 12163 | echo_area_message = previous_echo_area_message = Qnil; |
a2889657 JB |
12164 | |
12165 | if (!noninteractive) | |
12166 | { | |
5f5c8ee5 GM |
12167 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12168 | int i; | |
12169 | ||
12170 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 12171 | set_window_height (root_window, |
5f5c8ee5 | 12172 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 12173 | 0); |
c2213350 | 12174 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
12175 | set_window_height (minibuf_window, 1, 0); |
12176 | ||
c2213350 KH |
12177 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
12178 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
12179 | |
12180 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
12181 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
12182 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
12183 | ||
12184 | /* The default ellipsis glyphs `...'. */ | |
12185 | for (i = 0; i < 3; ++i) | |
12186 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 12187 | } |
5f5c8ee5 GM |
12188 | |
12189 | #ifdef HAVE_WINDOW_SYSTEM | |
12190 | { | |
12191 | /* Allocate the buffer for frame titles. */ | |
12192 | int size = 100; | |
12193 | frame_title_buf = (char *) xmalloc (size); | |
12194 | frame_title_buf_end = frame_title_buf + size; | |
12195 | frame_title_ptr = NULL; | |
12196 | } | |
12197 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 12198 | } |
5f5c8ee5 GM |
12199 | |
12200 |