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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 | |
5f5c8ee5 GM |
491 | /* Number of lines to keep in the message log buffer. t means |
492 | infinite. nil means don't log at all. */ | |
493 | ||
5992c4f7 | 494 | Lisp_Object Vmessage_log_max; |
d45de95b | 495 | |
5f5c8ee5 GM |
496 | /* A scratch glyph row with contents used for generating truncation |
497 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 498 | |
5f5c8ee5 GM |
499 | #define MAX_SCRATCH_GLYPHS 100 |
500 | struct glyph_row scratch_glyph_row; | |
501 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 502 | |
5f5c8ee5 GM |
503 | /* Ascent and height of the last line processed by move_it_to. */ |
504 | ||
505 | static int last_max_ascent, last_height; | |
506 | ||
507 | /* The maximum distance to look ahead for text properties. Values | |
508 | that are too small let us call compute_char_face and similar | |
509 | functions too often which is expensive. Values that are too large | |
510 | let us call compute_char_face and alike too often because we | |
511 | might not be interested in text properties that far away. */ | |
512 | ||
513 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
514 | ||
515 | /* Non-zero means print traces of redisplay if compiled with | |
516 | GLYPH_DEBUG != 0. */ | |
517 | ||
518 | #if GLYPH_DEBUG | |
519 | int trace_redisplay_p; | |
520 | #endif | |
521 | ||
522 | /* Value returned from text property handlers (see below). */ | |
523 | ||
524 | enum prop_handled | |
3c6595e0 | 525 | { |
5f5c8ee5 GM |
526 | HANDLED_NORMALLY, |
527 | HANDLED_RECOMPUTE_PROPS, | |
528 | HANDLED_OVERLAY_STRING_CONSUMED, | |
529 | HANDLED_RETURN | |
530 | }; | |
3c6595e0 | 531 | |
5f5c8ee5 GM |
532 | /* A description of text properties that redisplay is interested |
533 | in. */ | |
3c6595e0 | 534 | |
5f5c8ee5 GM |
535 | struct props |
536 | { | |
537 | /* The name of the property. */ | |
538 | Lisp_Object *name; | |
90adcf20 | 539 | |
5f5c8ee5 GM |
540 | /* A unique index for the property. */ |
541 | enum prop_idx idx; | |
542 | ||
543 | /* A handler function called to set up iterator IT from the property | |
544 | at IT's current position. Value is used to steer handle_stop. */ | |
545 | enum prop_handled (*handler) P_ ((struct it *it)); | |
546 | }; | |
547 | ||
548 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
549 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
550 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
551 | static enum prop_handled handle_overlay_change P_ ((struct it *)); | |
552 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
553 | ||
554 | /* Properties handled by iterators. */ | |
555 | ||
556 | static struct props it_props[] = | |
5992c4f7 | 557 | { |
5f5c8ee5 GM |
558 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
559 | /* Handle `face' before `display' because some sub-properties of | |
560 | `display' need to know the face. */ | |
561 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
562 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
563 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
564 | {NULL, 0, NULL} | |
565 | }; | |
5992c4f7 | 566 | |
5f5c8ee5 GM |
567 | /* Value is the position described by X. If X is a marker, value is |
568 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 569 | |
5f5c8ee5 | 570 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 571 | |
5f5c8ee5 | 572 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 573 | |
5f5c8ee5 GM |
574 | enum move_it_result |
575 | { | |
576 | /* Not used. Undefined value. */ | |
577 | MOVE_UNDEFINED, | |
bab29e15 | 578 | |
5f5c8ee5 GM |
579 | /* Move ended at the requested buffer position or ZV. */ |
580 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 581 | |
5f5c8ee5 GM |
582 | /* Move ended at the requested X pixel position. */ |
583 | MOVE_X_REACHED, | |
12adba34 | 584 | |
5f5c8ee5 GM |
585 | /* Move within a line ended at the end of a line that must be |
586 | continued. */ | |
587 | MOVE_LINE_CONTINUED, | |
588 | ||
589 | /* Move within a line ended at the end of a line that would | |
590 | be displayed truncated. */ | |
591 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 592 | |
5f5c8ee5 GM |
593 | /* Move within a line ended at a line end. */ |
594 | MOVE_NEWLINE_OR_CR | |
595 | }; | |
12adba34 | 596 | |
ff6c30e5 | 597 | |
5f5c8ee5 GM |
598 | \f |
599 | /* Function prototypes. */ | |
600 | ||
4fdb80f2 | 601 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
602 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
603 | struct text_pos)); | |
604 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
605 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
606 | static Lisp_Object eval_form P_ ((Lisp_Object)); | |
607 | static void insert_left_trunc_glyphs P_ ((struct it *)); | |
608 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
609 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
610 | static void append_space P_ ((struct it *, int)); | |
611 | static void make_cursor_line_fully_visible P_ ((struct window *)); | |
612 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
613 | static int trailing_whitespace_p P_ ((int)); | |
614 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
615 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
616 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
617 | static void push_it P_ ((struct it *)); | |
618 | static void pop_it P_ ((struct it *)); | |
619 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
620 | static void redisplay_internal P_ ((int)); | |
621 | static void echo_area_display P_ ((int)); | |
622 | static void redisplay_windows P_ ((Lisp_Object)); | |
623 | static void redisplay_window P_ ((Lisp_Object, int)); | |
624 | static void update_menu_bar P_ ((struct frame *, int)); | |
625 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
626 | static int try_window_id P_ ((struct window *)); | |
627 | static int display_line P_ ((struct it *)); | |
628 | static void display_mode_lines P_ ((struct window *)); | |
629 | static void display_mode_line P_ ((struct window *, enum face_id, | |
630 | Lisp_Object)); | |
631 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
632 | static char *decode_mode_spec P_ ((struct window *, char, int, int)); | |
633 | static void display_menu_bar P_ ((struct window *)); | |
634 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
635 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
636 | int, int, struct it *, int, int, int, int)); | |
637 | static void compute_line_metrics P_ ((struct it *)); | |
638 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
639 | static int get_overlay_strings P_ ((struct it *)); | |
640 | static void next_overlay_string P_ ((struct it *)); | |
641 | void set_iterator_to_next P_ ((struct it *)); | |
642 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
643 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
644 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
645 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 646 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
647 | static int next_element_from_display_vector P_ ((struct it *)); |
648 | static int next_element_from_string P_ ((struct it *)); | |
649 | static int next_element_from_c_string P_ ((struct it *)); | |
650 | static int next_element_from_buffer P_ ((struct it *)); | |
651 | static int next_element_from_image P_ ((struct it *)); | |
652 | static int next_element_from_stretch P_ ((struct it *)); | |
653 | static void load_overlay_strings P_ ((struct it *)); | |
654 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
655 | struct display_pos *)); | |
656 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
657 | Lisp_Object, int, int, int, int)); | |
658 | static int charset_at_position P_ ((struct text_pos)); | |
659 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, | |
660 | int, int, int)); | |
661 | void move_it_vertically_backward P_ ((struct it *, int)); | |
662 | static void init_to_row_start P_ ((struct it *, struct window *, | |
663 | struct glyph_row *)); | |
664 | static void init_to_row_end P_ ((struct it *, struct window *, | |
665 | struct glyph_row *)); | |
666 | static void back_to_previous_line_start P_ ((struct it *)); | |
667 | static void forward_to_next_line_start P_ ((struct it *)); | |
668 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
669 | Lisp_Object, int)); | |
670 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
671 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
672 | static int number_of_chars P_ ((unsigned char *, int)); | |
673 | static void compute_stop_pos P_ ((struct it *)); | |
674 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
675 | Lisp_Object)); | |
676 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
677 | static int next_overlay_change P_ ((int)); | |
678 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
679 | Lisp_Object, struct text_pos *)); | |
680 | ||
681 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
682 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 683 | |
5f5c8ee5 | 684 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 685 | |
5f5c8ee5 GM |
686 | static void update_toolbar P_ ((struct frame *, int)); |
687 | static void build_desired_toolbar_string P_ ((struct frame *f)); | |
688 | static int redisplay_toolbar P_ ((struct frame *)); | |
689 | static void display_toolbar_line P_ ((struct it *)); | |
12adba34 | 690 | |
5f5c8ee5 | 691 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 692 | |
5f5c8ee5 GM |
693 | \f |
694 | /*********************************************************************** | |
695 | Window display dimensions | |
696 | ***********************************************************************/ | |
12adba34 | 697 | |
5f5c8ee5 GM |
698 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
699 | text in window W. This is the height of W minus the height of a | |
700 | mode line, if any. */ | |
701 | ||
702 | INLINE int | |
703 | window_text_bottom_y (w) | |
704 | struct window *w; | |
705 | { | |
706 | struct frame *f = XFRAME (w->frame); | |
707 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
708 | ||
709 | if (WINDOW_WANTS_MODELINE_P (w)) | |
710 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
711 | return height; | |
f88eb0b6 KH |
712 | } |
713 | ||
f82aff7c | 714 | |
5f5c8ee5 GM |
715 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
716 | means return the total width of W, not including bitmap areas to | |
717 | the left and right of the window. */ | |
ff6c30e5 | 718 | |
5f5c8ee5 GM |
719 | INLINE int |
720 | window_box_width (w, area) | |
721 | struct window *w; | |
722 | int area; | |
723 | { | |
724 | struct frame *f = XFRAME (w->frame); | |
725 | int width = XFASTINT (w->width); | |
726 | ||
727 | if (!w->pseudo_window_p) | |
ff6c30e5 | 728 | { |
5f5c8ee5 GM |
729 | width -= FRAME_SCROLL_BAR_WIDTH (f) + 2 * FRAME_FLAGS_AREA_COLS (f); |
730 | ||
731 | if (area == TEXT_AREA) | |
732 | { | |
733 | if (INTEGERP (w->left_margin_width)) | |
734 | width -= XFASTINT (w->left_margin_width); | |
735 | if (INTEGERP (w->right_margin_width)) | |
736 | width -= XFASTINT (w->right_margin_width); | |
737 | } | |
738 | else if (area == LEFT_MARGIN_AREA) | |
739 | width = (INTEGERP (w->left_margin_width) | |
740 | ? XFASTINT (w->left_margin_width) : 0); | |
741 | else if (area == RIGHT_MARGIN_AREA) | |
742 | width = (INTEGERP (w->right_margin_width) | |
743 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 744 | } |
5f5c8ee5 GM |
745 | |
746 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 747 | } |
1adc55de | 748 | |
1adc55de | 749 | |
5f5c8ee5 GM |
750 | /* Return the pixel height of the display area of window W, not |
751 | including mode lines of W, if any.. */ | |
f88eb0b6 | 752 | |
5f5c8ee5 GM |
753 | INLINE int |
754 | window_box_height (w) | |
755 | struct window *w; | |
f88eb0b6 | 756 | { |
5f5c8ee5 GM |
757 | struct frame *f = XFRAME (w->frame); |
758 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
759 | ||
760 | if (WINDOW_WANTS_MODELINE_P (w)) | |
761 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
762 | ||
763 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
764 | height -= CURRENT_TOP_LINE_HEIGHT (w); | |
765 | ||
766 | return height; | |
5992c4f7 KH |
767 | } |
768 | ||
769 | ||
5f5c8ee5 GM |
770 | /* Return the frame-relative coordinate of the left edge of display |
771 | area AREA of window W. AREA < 0 means return the left edge of the | |
772 | whole window, to the right of any bitmap area at the left side of | |
773 | W. */ | |
5992c4f7 | 774 | |
5f5c8ee5 GM |
775 | INLINE int |
776 | window_box_left (w, area) | |
777 | struct window *w; | |
778 | int area; | |
90adcf20 | 779 | { |
5f5c8ee5 GM |
780 | struct frame *f = XFRAME (w->frame); |
781 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 782 | |
5f5c8ee5 | 783 | if (!w->pseudo_window_p) |
90adcf20 | 784 | { |
5f5c8ee5 GM |
785 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
786 | + FRAME_FLAGS_AREA_WIDTH (f)); | |
787 | ||
788 | if (area == TEXT_AREA) | |
789 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
790 | else if (area == RIGHT_MARGIN_AREA) | |
791 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
792 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 793 | } |
73af359d | 794 | |
5f5c8ee5 GM |
795 | return x; |
796 | } | |
90adcf20 | 797 | |
b6436d4e | 798 | |
5f5c8ee5 GM |
799 | /* Return the frame-relative coordinate of the right edge of display |
800 | area AREA of window W. AREA < 0 means return the left edge of the | |
801 | whole window, to the left of any bitmap area at the right side of | |
802 | W. */ | |
ded34426 | 803 | |
5f5c8ee5 GM |
804 | INLINE int |
805 | window_box_right (w, area) | |
806 | struct window *w; | |
807 | int area; | |
808 | { | |
809 | return window_box_left (w, area) + window_box_width (w, area); | |
810 | } | |
811 | ||
812 | ||
813 | /* Get the bounding box of the display area AREA of window W, without | |
814 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
815 | whole window, not including bitmap areas to the left and right of | |
816 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
817 | coordinates of the upper-left corner of the box. Return in | |
818 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
819 | ||
820 | INLINE void | |
821 | window_box (w, area, box_x, box_y, box_width, box_height) | |
822 | struct window *w; | |
823 | int area; | |
824 | int *box_x, *box_y, *box_width, *box_height; | |
825 | { | |
826 | struct frame *f = XFRAME (w->frame); | |
827 | ||
828 | *box_width = window_box_width (w, area); | |
829 | *box_height = window_box_height (w); | |
830 | *box_x = window_box_left (w, area); | |
831 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
832 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
833 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
834 | *box_y += CURRENT_TOP_LINE_HEIGHT (w); | |
ded34426 | 835 | } |
1adc55de | 836 | |
1adc55de | 837 | |
5f5c8ee5 GM |
838 | /* Get the bounding box of the display area AREA of window W, without |
839 | mode lines. AREA < 0 means the whole window, not including bitmap | |
840 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
841 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
842 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
843 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
844 | box. */ | |
ded34426 | 845 | |
5f5c8ee5 GM |
846 | INLINE void |
847 | window_box_edges (w, area, top_left_x, top_left_y, | |
848 | bottom_right_x, bottom_right_y) | |
849 | struct window *w; | |
850 | int area; | |
851 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 852 | { |
5f5c8ee5 GM |
853 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
854 | bottom_right_y); | |
855 | *bottom_right_x += *top_left_x; | |
856 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
857 | } |
858 | ||
5f5c8ee5 GM |
859 | |
860 | \f | |
861 | /*********************************************************************** | |
862 | Utilities | |
863 | ***********************************************************************/ | |
864 | ||
4fdb80f2 GM |
865 | /* Return the next character from STR which is MAXLEN bytes long. |
866 | Return in *LEN the length of the character. This is like | |
867 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
868 | we find one, we return a `?', but with the length of the illegal | |
869 | character. */ | |
870 | ||
871 | static INLINE int | |
7a5b8a93 | 872 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 873 | unsigned char *str; |
7a5b8a93 | 874 | int maxlen, *len; |
4fdb80f2 GM |
875 | { |
876 | int c; | |
877 | ||
878 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
879 | if (!CHAR_VALID_P (c, 1)) | |
880 | /* We may not change the length here because other places in Emacs | |
881 | don't use this function, i.e. they silently accept illegal | |
882 | characters. */ | |
883 | c = '?'; | |
884 | ||
885 | return c; | |
886 | } | |
887 | ||
888 | ||
889 | ||
5f5c8ee5 GM |
890 | /* Given a position POS containing a valid character and byte position |
891 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
892 | ||
893 | static struct text_pos | |
894 | string_pos_nchars_ahead (pos, string, nchars) | |
895 | struct text_pos pos; | |
896 | Lisp_Object string; | |
897 | int nchars; | |
0b1005ef | 898 | { |
5f5c8ee5 GM |
899 | xassert (STRINGP (string) && nchars >= 0); |
900 | ||
901 | if (STRING_MULTIBYTE (string)) | |
902 | { | |
903 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
904 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
905 | int len; | |
906 | ||
907 | while (nchars--) | |
908 | { | |
4fdb80f2 | 909 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
910 | p += len, rest -= len; |
911 | xassert (rest >= 0); | |
912 | CHARPOS (pos) += 1; | |
913 | BYTEPOS (pos) += len; | |
914 | } | |
915 | } | |
916 | else | |
917 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
918 | ||
919 | return pos; | |
0a9dc68b RS |
920 | } |
921 | ||
0a9dc68b | 922 | |
5f5c8ee5 GM |
923 | /* Value is the text position, i.e. character and byte position, |
924 | for character position CHARPOS in STRING. */ | |
925 | ||
926 | static INLINE struct text_pos | |
927 | string_pos (charpos, string) | |
928 | int charpos; | |
0a9dc68b | 929 | Lisp_Object string; |
0a9dc68b | 930 | { |
5f5c8ee5 GM |
931 | struct text_pos pos; |
932 | xassert (STRINGP (string)); | |
933 | xassert (charpos >= 0); | |
934 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
935 | return pos; | |
936 | } | |
937 | ||
938 | ||
939 | /* Value is a text position, i.e. character and byte position, for | |
940 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
941 | means recognize multibyte characters. */ | |
942 | ||
943 | static struct text_pos | |
944 | c_string_pos (charpos, s, multibyte_p) | |
945 | int charpos; | |
946 | unsigned char *s; | |
947 | int multibyte_p; | |
948 | { | |
949 | struct text_pos pos; | |
950 | ||
951 | xassert (s != NULL); | |
952 | xassert (charpos >= 0); | |
953 | ||
954 | if (multibyte_p) | |
0a9dc68b | 955 | { |
5f5c8ee5 GM |
956 | int rest = strlen (s), len; |
957 | ||
958 | SET_TEXT_POS (pos, 0, 0); | |
959 | while (charpos--) | |
0a9dc68b | 960 | { |
4fdb80f2 | 961 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
962 | s += len, rest -= len; |
963 | xassert (rest >= 0); | |
964 | CHARPOS (pos) += 1; | |
965 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
966 | } |
967 | } | |
5f5c8ee5 GM |
968 | else |
969 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 970 | |
5f5c8ee5 GM |
971 | return pos; |
972 | } | |
0a9dc68b | 973 | |
0a9dc68b | 974 | |
5f5c8ee5 GM |
975 | /* Value is the number of characters in C string S. MULTIBYTE_P |
976 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 977 | |
5f5c8ee5 GM |
978 | static int |
979 | number_of_chars (s, multibyte_p) | |
980 | unsigned char *s; | |
981 | int multibyte_p; | |
982 | { | |
983 | int nchars; | |
984 | ||
985 | if (multibyte_p) | |
986 | { | |
987 | int rest = strlen (s), len; | |
988 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 989 | |
5f5c8ee5 GM |
990 | for (nchars = 0; rest > 0; ++nchars) |
991 | { | |
4fdb80f2 | 992 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 993 | rest -= len, p += len; |
0a9dc68b RS |
994 | } |
995 | } | |
5f5c8ee5 GM |
996 | else |
997 | nchars = strlen (s); | |
998 | ||
999 | return nchars; | |
0b1005ef KH |
1000 | } |
1001 | ||
5f5c8ee5 GM |
1002 | |
1003 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1004 | NEWPOS->charpos. POS is a known position in string STRING. | |
1005 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1006 | |
5f5c8ee5 GM |
1007 | static void |
1008 | compute_string_pos (newpos, pos, string) | |
1009 | struct text_pos *newpos, pos; | |
1010 | Lisp_Object string; | |
76412d64 | 1011 | { |
5f5c8ee5 GM |
1012 | xassert (STRINGP (string)); |
1013 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1014 | ||
1015 | if (STRING_MULTIBYTE (string)) | |
1016 | *newpos = string_pos_nchars_ahead (pos, CHARPOS (*newpos) - CHARPOS (pos), | |
1017 | string); | |
1018 | else | |
1019 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1020 | } |
1021 | ||
9c74a0dd | 1022 | |
5f5c8ee5 GM |
1023 | /* Return the charset of the character at position POS in |
1024 | current_buffer. */ | |
1adc55de | 1025 | |
5f5c8ee5 GM |
1026 | static int |
1027 | charset_at_position (pos) | |
1028 | struct text_pos pos; | |
a2889657 | 1029 | { |
5f5c8ee5 GM |
1030 | int c, multibyte_p; |
1031 | unsigned char *p = BYTE_POS_ADDR (BYTEPOS (pos)); | |
1032 | ||
1033 | multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1034 | if (multibyte_p) | |
a2889657 | 1035 | { |
5f5c8ee5 GM |
1036 | int maxlen = ((BYTEPOS (pos) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) |
1037 | - BYTEPOS (pos)); | |
1038 | int len; | |
4fdb80f2 | 1039 | c = string_char_and_length (p, maxlen, &len); |
a2889657 | 1040 | } |
5f5c8ee5 GM |
1041 | else |
1042 | c = *p; | |
1043 | ||
1044 | return CHAR_CHARSET (c); | |
1045 | } | |
1046 | ||
1047 | ||
1048 | \f | |
1049 | /*********************************************************************** | |
1050 | Lisp form evaluation | |
1051 | ***********************************************************************/ | |
1052 | ||
1053 | /* Error handler for eval_form. */ | |
1054 | ||
1055 | static Lisp_Object | |
1056 | eval_handler (arg) | |
1057 | Lisp_Object arg; | |
1058 | { | |
1059 | return Qnil; | |
1060 | } | |
1061 | ||
1062 | ||
1063 | /* Evaluate SEXPR and return the result, or nil if something went | |
1064 | wrong. */ | |
1065 | ||
1066 | static Lisp_Object | |
1067 | eval_form (sexpr) | |
1068 | Lisp_Object sexpr; | |
1069 | { | |
1070 | int count = specpdl_ptr - specpdl; | |
1071 | Lisp_Object val; | |
1072 | specbind (Qinhibit_redisplay, Qt); | |
1073 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
1074 | return unbind_to (count, val); | |
1075 | } | |
1076 | ||
1077 | ||
1078 | \f | |
1079 | /*********************************************************************** | |
1080 | Debugging | |
1081 | ***********************************************************************/ | |
1082 | ||
1083 | #if 0 | |
1084 | ||
1085 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1086 | This is for debugging. It is too slow to do unconditionally. */ | |
1087 | ||
1088 | static void | |
1089 | check_it (it) | |
1090 | struct it *it; | |
1091 | { | |
1092 | if (it->method == next_element_from_string) | |
a2889657 | 1093 | { |
5f5c8ee5 GM |
1094 | xassert (STRINGP (it->string)); |
1095 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1096 | } | |
1097 | else if (it->method == next_element_from_buffer) | |
1098 | { | |
1099 | /* Check that character and byte positions agree. */ | |
1100 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1101 | } | |
73af359d | 1102 | |
5f5c8ee5 GM |
1103 | if (it->dpvec) |
1104 | xassert (it->current.dpvec_index >= 0); | |
1105 | else | |
1106 | xassert (it->current.dpvec_index < 0); | |
1107 | } | |
1f40cad2 | 1108 | |
5f5c8ee5 GM |
1109 | #define CHECK_IT(IT) check_it ((IT)) |
1110 | ||
1111 | #else /* not 0 */ | |
1112 | ||
1113 | #define CHECK_IT(IT) (void) 0 | |
1114 | ||
1115 | #endif /* not 0 */ | |
1116 | ||
1117 | ||
1118 | #if GLYPH_DEBUG | |
1119 | ||
1120 | /* Check that the window end of window W is what we expect it | |
1121 | to be---the last row in the current matrix displaying text. */ | |
1122 | ||
1123 | static void | |
1124 | check_window_end (w) | |
1125 | struct window *w; | |
1126 | { | |
1127 | if (!MINI_WINDOW_P (w) | |
1128 | && !NILP (w->window_end_valid)) | |
1129 | { | |
1130 | struct glyph_row *row; | |
1131 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1132 | XFASTINT (w->window_end_vpos)), | |
1133 | !row->enabled_p | |
1134 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1135 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1140 | ||
1141 | #else /* not GLYPH_DEBUG */ | |
1142 | ||
1143 | #define CHECK_WINDOW_END(W) (void) 0 | |
1144 | ||
1145 | #endif /* not GLYPH_DEBUG */ | |
1146 | ||
1147 | ||
1148 | \f | |
1149 | /*********************************************************************** | |
1150 | Iterator initialization | |
1151 | ***********************************************************************/ | |
1152 | ||
1153 | /* Initialize IT for displaying current_buffer in window W, starting | |
1154 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1155 | position is specified which is useful when the iterator is assigned | |
1156 | a position later. BYTEPOS is the byte position corresponding to | |
1157 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1158 | ||
1159 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1160 | will produce glyphs in that row. | |
1161 | ||
1162 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1163 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
1164 | TOP_LINE_FACE_ID for displaying mode lines, or TOOLBAR_FACE_ID for | |
1165 | displaying the toolbar. | |
1166 | ||
1167 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
1168 | TOP_LINE_FACE_ID, the iterator will be initialized to use the | |
1169 | corresponding mode line glyph row of the desired matrix of W. */ | |
1170 | ||
1171 | void | |
1172 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1173 | struct it *it; | |
1174 | struct window *w; | |
1175 | int charpos, bytepos; | |
1176 | struct glyph_row *row; | |
1177 | enum face_id base_face_id; | |
1178 | { | |
1179 | int highlight_region_p; | |
1180 | Lisp_Object value; | |
1181 | ||
1182 | /* Some precondition checks. */ | |
1183 | xassert (w != NULL && it != NULL); | |
1184 | xassert (charpos < 0 || current_buffer == XBUFFER (w->buffer)); | |
1185 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); | |
1186 | ||
1187 | /* If face attributes have been changed since the last redisplay, | |
1188 | free realized faces now because they depend on face definitions | |
1189 | that might have changed. */ | |
1190 | if (face_change_count) | |
1191 | { | |
1192 | face_change_count = 0; | |
1193 | free_all_realized_faces (Qnil); | |
1194 | } | |
1195 | ||
1196 | /* Use one of the mode line rows of W's desired matrix if | |
1197 | appropriate. */ | |
1198 | if (row == NULL) | |
1199 | { | |
1200 | if (base_face_id == MODE_LINE_FACE_ID) | |
1201 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
1202 | else if (base_face_id == TOP_LINE_FACE_ID) | |
1203 | row = MATRIX_TOP_LINE_ROW (w->desired_matrix); | |
1204 | } | |
1205 | ||
1206 | /* Clear IT. */ | |
1207 | bzero (it, sizeof *it); | |
1208 | it->current.overlay_string_index = -1; | |
1209 | it->current.dpvec_index = -1; | |
1210 | it->charset = CHARSET_ASCII; | |
1211 | it->base_face_id = base_face_id; | |
1212 | ||
1213 | /* The window in which we iterate over current_buffer: */ | |
1214 | XSETWINDOW (it->window, w); | |
1215 | it->w = w; | |
1216 | it->f = XFRAME (w->frame); | |
1217 | ||
1218 | /* If realized faces have been removed, e.g. because of face | |
1219 | attribute changes of named faces, recompute them. */ | |
1220 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1221 | recompute_basic_faces (it->f); | |
1222 | ||
1223 | /* Should we highlight trailing whitespace? */ | |
1224 | value = find_symbol_value (Qshow_trailing_whitespace); | |
1225 | it->show_trailing_whitespace_p | |
1226 | = EQ (value, Qunbound) ? 0 : !NILP (value); | |
1227 | ||
1228 | /* Current value of the `space-width', and 'height' properties. */ | |
1229 | it->space_width = Qnil; | |
1230 | it->font_height = Qnil; | |
1231 | ||
1232 | /* Are control characters displayed as `^C'? */ | |
1233 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1234 | ||
1235 | /* -1 means everything between a CR and the following line end | |
1236 | is invisible. >0 means lines indented more than this value are | |
1237 | invisible. */ | |
1238 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1239 | ? XFASTINT (current_buffer->selective_display) | |
1240 | : (!NILP (current_buffer->selective_display) | |
1241 | ? -1 : 0)); | |
1242 | it->selective_display_ellipsis_p | |
1243 | = !NILP (current_buffer->selective_display_ellipses); | |
1244 | ||
1245 | /* Display table to use. */ | |
1246 | it->dp = window_display_table (w); | |
1247 | ||
1248 | /* Are multibyte characters enabled in current_buffer? */ | |
1249 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1250 | ||
1251 | /* Non-zero if we should highlight the region. */ | |
1252 | highlight_region_p | |
1253 | = (!NILP (Vtransient_mark_mode) | |
1254 | && !NILP (current_buffer->mark_active) | |
1255 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1256 | ||
1257 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1258 | start and end of a visible region in window IT->w. Set both to | |
1259 | -1 to indicate no region. */ | |
1260 | if (highlight_region_p | |
1261 | /* Maybe highlight only in selected window. */ | |
1262 | && (/* Either show region everywhere. */ | |
1263 | highlight_nonselected_windows | |
1264 | /* Or show region in the selected window. */ | |
1265 | || w == XWINDOW (selected_window) | |
1266 | /* Or show the region if we are in the mini-buffer and W is | |
1267 | the window the mini-buffer refers to. */ | |
1268 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1269 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1270 | { | |
1271 | int charpos = marker_position (current_buffer->mark); | |
1272 | it->region_beg_charpos = min (PT, charpos); | |
1273 | it->region_end_charpos = max (PT, charpos); | |
1274 | } | |
1275 | else | |
1276 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1277 | ||
1278 | /* Get the position at which the redisplay_end_trigger hook should | |
1279 | be run, if it is to be run at all. */ | |
1280 | if (MARKERP (w->redisplay_end_trigger) | |
1281 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1282 | it->redisplay_end_trigger_charpos | |
1283 | = marker_position (w->redisplay_end_trigger); | |
1284 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1285 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1286 | ||
1287 | /* Correct bogus values of tab_width. */ | |
1288 | it->tab_width = XINT (current_buffer->tab_width); | |
1289 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1290 | it->tab_width = 8; | |
1291 | ||
1292 | /* Are lines in the display truncated? */ | |
1293 | it->truncate_lines_p | |
1294 | = (base_face_id != DEFAULT_FACE_ID | |
1295 | || XINT (it->w->hscroll) | |
1296 | || (truncate_partial_width_windows | |
1297 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1298 | || !NILP (current_buffer->truncate_lines)); | |
1299 | ||
1300 | /* Get dimensions of truncation and continuation glyphs. These are | |
1301 | displayed as bitmaps under X, so we don't need them for such | |
1302 | frames. */ | |
1303 | if (!FRAME_WINDOW_P (it->f)) | |
1304 | { | |
1305 | if (it->truncate_lines_p) | |
1306 | { | |
1307 | /* We will need the truncation glyph. */ | |
1308 | xassert (it->glyph_row == NULL); | |
1309 | produce_special_glyphs (it, IT_TRUNCATION); | |
1310 | it->truncation_pixel_width = it->pixel_width; | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | /* We will need the continuation glyph. */ | |
1315 | xassert (it->glyph_row == NULL); | |
1316 | produce_special_glyphs (it, IT_CONTINUATION); | |
1317 | it->continuation_pixel_width = it->pixel_width; | |
1318 | } | |
1319 | ||
1320 | /* Reset these values to zero becaue the produce_special_glyphs | |
1321 | above has changed them. */ | |
1322 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1323 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1324 | } |
1325 | ||
1326 | /* Set this after getting the dimensions of truncation and | |
1327 | continuation glyphs, so that we don't produce glyphs when calling | |
1328 | produce_special_glyphs, above. */ | |
1329 | it->glyph_row = row; | |
1330 | it->area = TEXT_AREA; | |
1331 | ||
1332 | /* Get the dimensions of the display area. The display area | |
1333 | consists of the visible window area plus a horizontally scrolled | |
1334 | part to the left of the window. All x-values are relative to the | |
1335 | start of this total display area. */ | |
1336 | if (base_face_id != DEFAULT_FACE_ID) | |
1337 | { | |
1338 | /* Mode lines, menu bar in terminal frames. */ | |
1339 | it->first_visible_x = 0; | |
1340 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1341 | } | |
1342 | else | |
1343 | { | |
1344 | it->first_visible_x | |
1345 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1346 | it->last_visible_x = (it->first_visible_x | |
1347 | + window_box_width (w, TEXT_AREA)); | |
1348 | ||
1349 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1350 | the right margin. Otherwise, leave room for the continuation | |
1351 | glyph(s). Truncation and continuation glyphs are not inserted | |
1352 | for window-based redisplay. */ | |
1353 | if (!FRAME_WINDOW_P (it->f)) | |
1354 | { | |
1355 | if (it->truncate_lines_p) | |
1356 | it->last_visible_x -= it->truncation_pixel_width; | |
1357 | else | |
1358 | it->last_visible_x -= it->continuation_pixel_width; | |
1359 | } | |
1360 | ||
1361 | it->top_line_p = WINDOW_WANTS_TOP_LINE_P (w); | |
1362 | it->current_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w) + w->vscroll; | |
1363 | } | |
1364 | ||
1365 | /* Leave room for a border glyph. */ | |
1366 | if (!FRAME_WINDOW_P (it->f) | |
1367 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1368 | it->last_visible_x -= 1; | |
1369 | ||
1370 | it->last_visible_y = window_text_bottom_y (w); | |
1371 | ||
1372 | /* For mode lines and alike, arrange for the first glyph having a | |
1373 | left box line if the face specifies a box. */ | |
1374 | if (base_face_id != DEFAULT_FACE_ID) | |
1375 | { | |
1376 | struct face *face; | |
1377 | ||
1378 | it->face_id = base_face_id; | |
1379 | ||
1380 | /* If we have a boxed mode line, make the first character appear | |
1381 | with a left box line. */ | |
1382 | face = FACE_FROM_ID (it->f, base_face_id); | |
1383 | if (face->box != FACE_NO_BOX) | |
1384 | it->start_of_box_run_p = 1; | |
1385 | } | |
1386 | ||
1387 | /* If a buffer position was specified, set the iterator there, | |
1388 | getting overlays and face properties from that position. */ | |
1389 | if (charpos > 0) | |
1390 | { | |
1391 | it->end_charpos = ZV; | |
1392 | it->face_id = -1; | |
1393 | IT_CHARPOS (*it) = charpos; | |
1394 | ||
1395 | /* Compute byte position if not specified. */ | |
1396 | if (bytepos <= 0) | |
1397 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1398 | else | |
1399 | IT_BYTEPOS (*it) = bytepos; | |
1400 | ||
1401 | /* Compute faces etc. */ | |
1402 | reseat (it, it->current.pos, 1); | |
1403 | } | |
1404 | ||
1405 | CHECK_IT (it); | |
1406 | } | |
1407 | ||
1408 | ||
1409 | /* Initialize IT for the display of window W with window start POS. */ | |
1410 | ||
1411 | void | |
1412 | start_display (it, w, pos) | |
1413 | struct it *it; | |
1414 | struct window *w; | |
1415 | struct text_pos pos; | |
1416 | { | |
1417 | int start_at_line_beg_p; | |
1418 | struct glyph_row *row; | |
1419 | int first_vpos = WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0; | |
1420 | int first_y; | |
1421 | ||
1422 | row = w->desired_matrix->rows + first_vpos; | |
1423 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1424 | first_y = it->current_y; | |
1425 | ||
1426 | /* If window start is not at a line start, move back to the line | |
1427 | start. This makes sure that we take continuation lines into | |
1428 | account. */ | |
1429 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1430 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1431 | if (!start_at_line_beg_p) | |
1432 | reseat_at_previous_visible_line_start (it); | |
1433 | ||
1434 | #if NO_PROMPT_IN_BUFFER | |
1435 | /* Take the mini-buffer prompt width into account for tab | |
1436 | calculations. */ | |
1437 | if (MINI_WINDOW_P (w) && IT_CHARPOS (*it) == BEGV) | |
1438 | { | |
1439 | /* Why is mini-buffer_prompt_width guaranteed to be set here? */ | |
1440 | it->prompt_width = minibuf_prompt_pixel_width; | |
1441 | } | |
1442 | #endif /* NO_PROMPT_IN_BUFFER */ | |
1443 | ||
1444 | /* If window start is not at a line start, skip forward to POS to | |
1445 | get the correct continuation_lines_width and current_x. */ | |
1446 | if (!start_at_line_beg_p) | |
1447 | { | |
1448 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1449 | ||
1450 | /* If lines are continued, this line may end in the middle of a | |
1451 | multi-glyph character (e.g. a control character displayed as | |
1452 | \003, or in the middle of an overlay string). In this case | |
1453 | move_it_to above will not have taken us to the start of | |
1454 | the continuation line but to the end of the continued line. */ | |
1455 | if (!it->truncate_lines_p && it->current_x > 0) | |
1456 | { | |
1457 | if (it->current.dpvec_index >= 0 | |
1458 | || it->current.overlay_string_index >= 0) | |
1459 | { | |
1460 | set_iterator_to_next (it); | |
1461 | move_it_in_display_line_to (it, -1, -1, 0); | |
1462 | } | |
1463 | it->continuation_lines_width += it->current_x; | |
1464 | } | |
1465 | ||
1466 | it->current_y = first_y; | |
1467 | it->vpos = 0; | |
1468 | it->current_x = it->hpos = 0; | |
1469 | } | |
1470 | ||
1471 | #if 0 /* Don't assert the following because start_display is sometimes | |
1472 | called intentionally with a window start that is not at a | |
1473 | line start. Please leave this code in as a comment. */ | |
1474 | ||
1475 | /* Window start should be on a line start, now. */ | |
1476 | xassert (it->continuation_lines_width | |
1477 | || IT_CHARPOS (it) == BEGV | |
1478 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1479 | #endif /* 0 */ | |
1480 | } | |
1481 | ||
1482 | ||
1483 | /* Initialize IT for stepping through current_buffer in window W, | |
1484 | starting at position POS that includes overlay string and display | |
1485 | vector/ control character translation position information. */ | |
1486 | ||
1487 | static void | |
1488 | init_from_display_pos (it, w, pos) | |
1489 | struct it *it; | |
1490 | struct window *w; | |
1491 | struct display_pos *pos; | |
1492 | { | |
1493 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1494 | text, so we might end up at a position different from POS. This | |
1495 | is only a problem when POS is a row start after a newline and an | |
1496 | overlay starts there with an after-string, and the overlay has an | |
1497 | invisible property. Since we don't skip invisible text in | |
1498 | display_line and elsewhere immediately after consuming the | |
1499 | newline before the row start, such a POS will not be in a string, | |
1500 | but the call to init_iterator below will move us to the | |
1501 | after-string. */ | |
1502 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1503 | NULL, DEFAULT_FACE_ID); | |
1504 | ||
1505 | /* If position is within an overlay string, set up IT to | |
1506 | the right overlay string. */ | |
1507 | if (pos->overlay_string_index >= 0) | |
1508 | { | |
1509 | int relative_index; | |
1510 | ||
1511 | /* We already have the first chunk of overlay strings in | |
1512 | IT->overlay_strings. Load more until the one for | |
1513 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1514 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1515 | { | |
1516 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1517 | it->current.overlay_string_index = 0; | |
1518 | while (n--) | |
1519 | { | |
1520 | load_overlay_strings (it); | |
1521 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | it->current.overlay_string_index = pos->overlay_string_index; | |
1526 | relative_index = (it->current.overlay_string_index | |
1527 | % OVERLAY_STRING_CHUNK_SIZE); | |
1528 | it->string = it->overlay_strings[relative_index]; | |
1529 | it->current.string_pos = pos->string_pos; | |
1530 | it->method = next_element_from_string; | |
1531 | } | |
1532 | else if (CHARPOS (pos->string_pos) >= 0) | |
1533 | { | |
1534 | /* Recorded position is not in an overlay string, but in another | |
1535 | string. This can only be a string from a `display' property. | |
1536 | IT should already be filled with that string. */ | |
1537 | it->current.string_pos = pos->string_pos; | |
1538 | xassert (STRINGP (it->string)); | |
1539 | } | |
1540 | ||
1541 | /* Restore position in display vector translations or control | |
1542 | character translations. */ | |
1543 | if (pos->dpvec_index >= 0) | |
1544 | { | |
1545 | /* This fills IT->dpvec. */ | |
1546 | get_next_display_element (it); | |
1547 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1548 | it->current.dpvec_index = pos->dpvec_index; | |
1549 | } | |
1550 | ||
1551 | CHECK_IT (it); | |
1552 | } | |
1553 | ||
1554 | ||
1555 | /* Initialize IT for stepping through current_buffer in window W | |
1556 | starting at ROW->start. */ | |
1557 | ||
1558 | static void | |
1559 | init_to_row_start (it, w, row) | |
1560 | struct it *it; | |
1561 | struct window *w; | |
1562 | struct glyph_row *row; | |
1563 | { | |
1564 | init_from_display_pos (it, w, &row->start); | |
1565 | it->continuation_lines_width = row->continuation_lines_width; | |
1566 | CHECK_IT (it); | |
1567 | } | |
1568 | ||
1569 | ||
1570 | /* Initialize IT for stepping through current_buffer in window W | |
1571 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1572 | ||
1573 | static void | |
1574 | init_to_row_end (it, w, row) | |
1575 | struct it *it; | |
1576 | struct window *w; | |
1577 | struct glyph_row *row; | |
1578 | { | |
1579 | init_from_display_pos (it, w, &row->end); | |
1580 | ||
1581 | if (row->continued_p) | |
1582 | it->continuation_lines_width = (row->continuation_lines_width | |
1583 | + row->pixel_width); | |
1584 | CHECK_IT (it); | |
1585 | } | |
1586 | ||
1587 | ||
1588 | ||
1589 | \f | |
1590 | /*********************************************************************** | |
1591 | Text properties | |
1592 | ***********************************************************************/ | |
1593 | ||
1594 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1595 | overlay changes. Set IT->stop_charpos to the next position where | |
1596 | to stop. */ | |
1597 | ||
1598 | static void | |
1599 | handle_stop (it) | |
1600 | struct it *it; | |
1601 | { | |
1602 | enum prop_handled handled; | |
1603 | int handle_overlay_change_p = 1; | |
1604 | struct props *p; | |
1605 | ||
1606 | it->dpvec = NULL; | |
1607 | it->current.dpvec_index = -1; | |
1608 | ||
1609 | do | |
1610 | { | |
1611 | handled = HANDLED_NORMALLY; | |
1612 | ||
1613 | /* Call text property handlers. */ | |
1614 | for (p = it_props; p->handler; ++p) | |
1615 | { | |
1616 | handled = p->handler (it); | |
1617 | ||
1618 | if (handled == HANDLED_RECOMPUTE_PROPS) | |
1619 | break; | |
1620 | else if (handled == HANDLED_RETURN) | |
1621 | return; | |
1622 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1623 | handle_overlay_change_p = 0; | |
1624 | } | |
1625 | ||
1626 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1627 | { | |
1628 | /* Don't check for overlay strings below when set to deliver | |
1629 | characters from a display vector. */ | |
1630 | if (it->method == next_element_from_display_vector) | |
1631 | handle_overlay_change_p = 0; | |
1632 | ||
1633 | /* Handle overlay changes. */ | |
1634 | if (handle_overlay_change_p) | |
1635 | handled = handle_overlay_change (it); | |
1636 | ||
1637 | /* Determine where to stop next. */ | |
1638 | if (handled == HANDLED_NORMALLY) | |
1639 | compute_stop_pos (it); | |
1640 | } | |
1641 | } | |
1642 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1643 | } | |
1644 | ||
1645 | ||
1646 | /* Compute IT->stop_charpos from text property and overlay change | |
1647 | information for IT's current position. */ | |
1648 | ||
1649 | static void | |
1650 | compute_stop_pos (it) | |
1651 | struct it *it; | |
1652 | { | |
1653 | register INTERVAL iv, next_iv; | |
1654 | Lisp_Object object, limit, position; | |
1655 | ||
1656 | /* If nowhere else, stop at the end. */ | |
1657 | it->stop_charpos = it->end_charpos; | |
1658 | ||
1659 | if (STRINGP (it->string)) | |
1660 | { | |
1661 | /* Strings are usually short, so don't limit the search for | |
1662 | properties. */ | |
1663 | object = it->string; | |
1664 | limit = Qnil; | |
1665 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1666 | } | |
1667 | else | |
1668 | { | |
1669 | int charpos; | |
1670 | ||
1671 | /* If next overlay change is in front of the current stop pos | |
1672 | (which is IT->end_charpos), stop there. Note: value of | |
1673 | next_overlay_change is point-max if no overlay change | |
1674 | follows. */ | |
1675 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1676 | if (charpos < it->stop_charpos) | |
1677 | it->stop_charpos = charpos; | |
1678 | ||
1679 | /* If showing the region, we have to stop at the region | |
1680 | start or end because the face might change there. */ | |
1681 | if (it->region_beg_charpos > 0) | |
1682 | { | |
1683 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1684 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1685 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1686 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1687 | } | |
1688 | ||
1689 | /* Set up variables for computing the stop position from text | |
1690 | property changes. */ | |
1691 | XSETBUFFER (object, current_buffer); | |
1692 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1693 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1694 | ||
1695 | } | |
1696 | ||
1697 | /* Get the interval containing IT's position. Value is a null | |
1698 | interval if there isn't such an interval. */ | |
1699 | iv = validate_interval_range (object, &position, &position, 0); | |
1700 | if (!NULL_INTERVAL_P (iv)) | |
1701 | { | |
1702 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1703 | struct props *p; | |
1704 | ||
1705 | /* Get properties here. */ | |
1706 | for (p = it_props; p->handler; ++p) | |
1707 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1708 | ||
1709 | /* Look for an interval following iv that has different | |
1710 | properties. */ | |
1711 | for (next_iv = next_interval (iv); | |
1712 | (!NULL_INTERVAL_P (next_iv) | |
1713 | && (NILP (limit) | |
1714 | || XFASTINT (limit) > next_iv->position)); | |
1715 | next_iv = next_interval (next_iv)) | |
1716 | { | |
1717 | for (p = it_props; p->handler; ++p) | |
1718 | { | |
1719 | Lisp_Object new_value; | |
1720 | ||
1721 | new_value = textget (next_iv->plist, *p->name); | |
1722 | if (!EQ (values_here[p->idx], new_value)) | |
1723 | break; | |
1724 | } | |
1725 | ||
1726 | if (p->handler) | |
1727 | break; | |
1728 | } | |
1729 | ||
1730 | if (!NULL_INTERVAL_P (next_iv)) | |
1731 | { | |
1732 | if (INTEGERP (limit) | |
1733 | && next_iv->position >= XFASTINT (limit)) | |
1734 | /* No text property change up to limit. */ | |
1735 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1736 | else | |
1737 | /* Text properties change in next_iv. */ | |
1738 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | xassert (STRINGP (it->string) | |
1743 | || (it->stop_charpos >= BEGV | |
1744 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1745 | } | |
1746 | ||
1747 | ||
1748 | /* Return the position of the next overlay change after POS in | |
1749 | current_buffer. Value is point-max if no overlay change | |
1750 | follows. This is like `next-overlay-change' but doesn't use | |
1751 | xmalloc. */ | |
1752 | ||
1753 | static int | |
1754 | next_overlay_change (pos) | |
1755 | int pos; | |
1756 | { | |
1757 | int noverlays; | |
1758 | int endpos; | |
1759 | Lisp_Object *overlays; | |
1760 | int len; | |
1761 | int i; | |
1762 | ||
1763 | /* Get all overlays at the given position. */ | |
1764 | len = 10; | |
1765 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1766 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1767 | if (noverlays > len) | |
1768 | { | |
1769 | len = noverlays; | |
1770 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1771 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1772 | } | |
1773 | ||
1774 | /* If any of these overlays ends before endpos, | |
1775 | use its ending point instead. */ | |
1776 | for (i = 0; i < noverlays; ++i) | |
1777 | { | |
1778 | Lisp_Object oend; | |
1779 | int oendpos; | |
1780 | ||
1781 | oend = OVERLAY_END (overlays[i]); | |
1782 | oendpos = OVERLAY_POSITION (oend); | |
1783 | endpos = min (endpos, oendpos); | |
1784 | } | |
1785 | ||
1786 | return endpos; | |
1787 | } | |
1788 | ||
1789 | ||
1790 | \f | |
1791 | /*********************************************************************** | |
1792 | Fontification | |
1793 | ***********************************************************************/ | |
1794 | ||
1795 | /* Handle changes in the `fontified' property of the current buffer by | |
1796 | calling hook functions from Qfontification_functions to fontify | |
1797 | regions of text. */ | |
1798 | ||
1799 | static enum prop_handled | |
1800 | handle_fontified_prop (it) | |
1801 | struct it *it; | |
1802 | { | |
1803 | Lisp_Object prop, pos; | |
1804 | enum prop_handled handled = HANDLED_NORMALLY; | |
1805 | ||
1806 | /* Get the value of the `fontified' property at IT's current buffer | |
1807 | position. (The `fontified' property doesn't have a special | |
1808 | meaning in strings.) If the value is nil, call functions from | |
1809 | Qfontification_functions. */ | |
1810 | if (!STRINGP (it->string) | |
1811 | && it->s == NULL | |
1812 | && !NILP (Vfontification_functions) | |
1813 | && (pos = make_number (IT_CHARPOS (*it)), | |
1814 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1815 | NILP (prop))) | |
1816 | { | |
1817 | Lisp_Object args[2]; | |
1818 | ||
1819 | /* Run the hook functions. */ | |
1820 | args[0] = Qfontification_functions; | |
1821 | args[1] = pos; | |
1822 | Frun_hook_with_args (make_number (2), args); | |
1823 | ||
1824 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1825 | something. This avoids an endless loop if they failed to | |
1826 | fontify the text for which reason ever. */ | |
1827 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1828 | handled = HANDLED_RECOMPUTE_PROPS; | |
1829 | } | |
1830 | ||
1831 | return handled; | |
1832 | } | |
1833 | ||
1834 | ||
1835 | \f | |
1836 | /*********************************************************************** | |
1837 | Faces | |
1838 | ***********************************************************************/ | |
1839 | ||
1840 | /* Set up iterator IT from face properties at its current position. | |
1841 | Called from handle_stop. */ | |
1842 | ||
1843 | static enum prop_handled | |
1844 | handle_face_prop (it) | |
1845 | struct it *it; | |
1846 | { | |
1847 | int new_face_id, next_stop; | |
1848 | ||
1849 | if (!STRINGP (it->string)) | |
1850 | { | |
1851 | new_face_id | |
1852 | = face_at_buffer_position (it->w, | |
1853 | IT_CHARPOS (*it), | |
1854 | it->region_beg_charpos, | |
1855 | it->region_end_charpos, | |
1856 | &next_stop, | |
1857 | (IT_CHARPOS (*it) | |
1858 | + TEXT_PROP_DISTANCE_LIMIT), | |
1859 | 0); | |
1860 | ||
1861 | /* Is this a start of a run of characters with box face? | |
1862 | Caveat: this can be called for a freshly initialized | |
1863 | iterator; face_id is -1 is this case. We know that the new | |
1864 | face will not change until limit, i.e. if the new face has a | |
1865 | box, all characters up to limit will have one. But, as | |
1866 | usual, we don't know whether limit is really the end. */ | |
1867 | if (new_face_id != it->face_id) | |
1868 | { | |
1869 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1870 | ||
1871 | /* If new face has a box but old face has not, this is | |
1872 | the start of a run of characters with box, i.e. it has | |
1873 | a shadow on the left side. The value of face_id of the | |
1874 | iterator will be -1 if this is the initial call that gets | |
1875 | the face. In this case, we have to look in front of IT's | |
1876 | position and see whether there is a face != new_face_id. */ | |
1877 | it->start_of_box_run_p | |
1878 | = (new_face->box != FACE_NO_BOX | |
1879 | && (it->face_id >= 0 | |
1880 | || IT_CHARPOS (*it) == BEG | |
1881 | || new_face_id != face_before_it_pos (it))); | |
1882 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1883 | } | |
1884 | } | |
1885 | else | |
1886 | { | |
1887 | new_face_id | |
1888 | = face_at_string_position (it->w, | |
1889 | it->string, | |
1890 | IT_STRING_CHARPOS (*it), | |
1891 | (it->current.overlay_string_index >= 0 | |
1892 | ? IT_CHARPOS (*it) | |
1893 | : 0), | |
1894 | it->region_beg_charpos, | |
1895 | it->region_end_charpos, | |
1896 | &next_stop, | |
1897 | it->base_face_id); | |
1898 | ||
1899 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
1900 | /* If IT is used to display a mode line we would really like to | |
1901 | use the mode line face instead of the frame's default face. */ | |
1902 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
1903 | && new_face_id == DEFAULT_FACE_ID) | |
1904 | new_face_id = MODE_LINE_FACE_ID; | |
1905 | #endif | |
1906 | ||
1907 | /* Is this a start of a run of characters with box? Caveat: | |
1908 | this can be called for a freshly allocated iterator; face_id | |
1909 | is -1 is this case. We know that the new face will not | |
1910 | change until the next check pos, i.e. if the new face has a | |
1911 | box, all characters up to that position will have a | |
1912 | box. But, as usual, we don't know whether that position | |
1913 | is really the end. */ | |
1914 | if (new_face_id != it->face_id) | |
1915 | { | |
1916 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1917 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
1918 | ||
1919 | /* If new face has a box but old face hasn't, this is the | |
1920 | start of a run of characters with box, i.e. it has a | |
1921 | shadow on the left side. */ | |
1922 | it->start_of_box_run_p | |
1923 | = new_face->box && (old_face == NULL || !old_face->box); | |
1924 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1925 | } | |
1926 | } | |
1927 | ||
1928 | it->face_id = new_face_id; | |
1929 | it->charset = CHARSET_ASCII; | |
1930 | return HANDLED_NORMALLY; | |
1931 | } | |
1932 | ||
1933 | ||
1934 | /* Compute the face one character before or after the current position | |
1935 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
1936 | position. Value is the id of the face. */ | |
1937 | ||
1938 | static int | |
1939 | face_before_or_after_it_pos (it, before_p) | |
1940 | struct it *it; | |
1941 | int before_p; | |
1942 | { | |
1943 | int face_id, limit; | |
1944 | int next_check_charpos; | |
1945 | struct text_pos pos; | |
1946 | ||
1947 | xassert (it->s == NULL); | |
1948 | ||
1949 | if (STRINGP (it->string)) | |
1950 | { | |
1951 | /* No face change past the end of the string (for the case | |
1952 | we are padding with spaces). No face change before the | |
1953 | string start. */ | |
1954 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
1955 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
1956 | return it->face_id; | |
1957 | ||
1958 | /* Set pos to the position before or after IT's current position. */ | |
1959 | if (before_p) | |
1960 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
1961 | else | |
1962 | pos = string_pos (IT_STRING_CHARPOS (*it) + 1, it->string); | |
1963 | ||
1964 | /* Get the face for ASCII, or unibyte. */ | |
1965 | face_id | |
1966 | = face_at_string_position (it->w, | |
1967 | it->string, | |
1968 | CHARPOS (pos), | |
1969 | (it->current.overlay_string_index >= 0 | |
1970 | ? IT_CHARPOS (*it) | |
1971 | : 0), | |
1972 | it->region_beg_charpos, | |
1973 | it->region_end_charpos, | |
1974 | &next_check_charpos, | |
1975 | it->base_face_id); | |
1976 | ||
1977 | /* Correct the face for charsets different from ASCII. Do it | |
1978 | for the multibyte case only. The face returned above is | |
1979 | suitable for unibyte text if IT->string is unibyte. */ | |
1980 | if (STRING_MULTIBYTE (it->string)) | |
1981 | { | |
1982 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
1983 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
1984 | int c, len, charset; | |
1985 | ||
4fdb80f2 | 1986 | c = string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1987 | charset = CHAR_CHARSET (c); |
1988 | if (charset != CHARSET_ASCII) | |
1989 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
1990 | } | |
1991 | } | |
1992 | else | |
1993 | { | |
70851746 GM |
1994 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
1995 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
1996 | return it->face_id; | |
1997 | ||
5f5c8ee5 GM |
1998 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
1999 | pos = it->current.pos; | |
2000 | ||
2001 | if (before_p) | |
2002 | DEC_TEXT_POS (pos); | |
2003 | else | |
2004 | INC_TEXT_POS (pos); | |
70851746 | 2005 | |
5f5c8ee5 GM |
2006 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2007 | face_id = face_at_buffer_position (it->w, | |
2008 | CHARPOS (pos), | |
2009 | it->region_beg_charpos, | |
2010 | it->region_end_charpos, | |
2011 | &next_check_charpos, | |
2012 | limit, 0); | |
2013 | ||
2014 | /* Correct the face for charsets different from ASCII. Do it | |
2015 | for the multibyte case only. The face returned above is | |
2016 | suitable for unibyte text if current_buffer is unibyte. */ | |
2017 | if (it->multibyte_p) | |
2018 | { | |
2019 | int charset = charset_at_position (pos); | |
2020 | if (charset != CHARSET_ASCII) | |
2021 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
2022 | } | |
2023 | } | |
2024 | ||
2025 | return face_id; | |
2026 | } | |
2027 | ||
2028 | ||
2029 | \f | |
2030 | /*********************************************************************** | |
2031 | Invisible text | |
2032 | ***********************************************************************/ | |
2033 | ||
2034 | /* Set up iterator IT from invisible properties at its current | |
2035 | position. Called from handle_stop. */ | |
2036 | ||
2037 | static enum prop_handled | |
2038 | handle_invisible_prop (it) | |
2039 | struct it *it; | |
2040 | { | |
2041 | enum prop_handled handled = HANDLED_NORMALLY; | |
2042 | ||
2043 | if (STRINGP (it->string)) | |
2044 | { | |
2045 | extern Lisp_Object Qinvisible; | |
2046 | Lisp_Object prop, end_charpos, limit, charpos; | |
2047 | ||
2048 | /* Get the value of the invisible text property at the | |
2049 | current position. Value will be nil if there is no such | |
2050 | property. */ | |
2051 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2052 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2053 | ||
2054 | if (!NILP (prop)) | |
2055 | { | |
2056 | handled = HANDLED_RECOMPUTE_PROPS; | |
2057 | ||
2058 | /* Get the position at which the next change of the | |
2059 | invisible text property can be found in IT->string. | |
2060 | Value will be nil if the property value is the same for | |
2061 | all the rest of IT->string. */ | |
2062 | XSETINT (limit, XSTRING (it->string)->size); | |
2063 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2064 | it->string, limit); | |
2065 | ||
2066 | /* Text at current position is invisible. The next | |
2067 | change in the property is at position end_charpos. | |
2068 | Move IT's current position to that position. */ | |
2069 | if (INTEGERP (end_charpos) | |
2070 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2071 | { | |
2072 | struct text_pos old; | |
2073 | old = it->current.string_pos; | |
2074 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2075 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2076 | } | |
2077 | else | |
2078 | { | |
2079 | /* The rest of the string is invisible. If this is an | |
2080 | overlay string, proceed with the next overlay string | |
2081 | or whatever comes and return a character from there. */ | |
2082 | if (it->current.overlay_string_index >= 0) | |
2083 | { | |
2084 | next_overlay_string (it); | |
2085 | /* Don't check for overlay strings when we just | |
2086 | finished processing them. */ | |
2087 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2088 | } | |
2089 | else | |
2090 | { | |
2091 | struct Lisp_String *s = XSTRING (it->string); | |
2092 | IT_STRING_CHARPOS (*it) = s->size; | |
2093 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2094 | } | |
2095 | } | |
2096 | } | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | int visible_p, newpos, next_stop; | |
2101 | Lisp_Object pos, prop; | |
2102 | ||
2103 | /* First of all, is there invisible text at this position? */ | |
2104 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2105 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2106 | ||
2107 | /* If we are on invisible text, skip over it. */ | |
2108 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2109 | { | |
2110 | /* Record whether we have to display an ellipsis for the | |
2111 | invisible text. */ | |
2112 | int display_ellipsis_p | |
2113 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2114 | ||
2115 | handled = HANDLED_RECOMPUTE_PROPS; | |
2116 | ||
2117 | /* Loop skipping over invisible text. The loop is left at | |
2118 | ZV or with IT on the first char being visible again. */ | |
2119 | do | |
2120 | { | |
2121 | /* Try to skip some invisible text. Return value is the | |
2122 | position reached which can be equal to IT's position | |
2123 | if there is nothing invisible here. This skips both | |
2124 | over invisible text properties and overlays with | |
2125 | invisible property. */ | |
2126 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2127 | &next_stop, ZV, it->window); | |
2128 | ||
2129 | /* If we skipped nothing at all we weren't at invisible | |
2130 | text in the first place. If everything to the end of | |
2131 | the buffer was skipped, end the loop. */ | |
2132 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2133 | visible_p = 1; | |
2134 | else | |
2135 | { | |
2136 | /* We skipped some characters but not necessarily | |
2137 | all there are. Check if we ended up on visible | |
2138 | text. Fget_char_property returns the property of | |
2139 | the char before the given position, i.e. if we | |
2140 | get visible_p = 1, this means that the char at | |
2141 | newpos is visible. */ | |
2142 | XSETFASTINT (pos, newpos); | |
2143 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2144 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2145 | } | |
2146 | ||
2147 | /* If we ended up on invisible text, proceed to | |
2148 | skip starting with next_stop. */ | |
2149 | if (!visible_p) | |
2150 | IT_CHARPOS (*it) = next_stop; | |
2151 | } | |
2152 | while (!visible_p); | |
2153 | ||
2154 | /* The position newpos is now either ZV or on visible text. */ | |
2155 | IT_CHARPOS (*it) = newpos; | |
2156 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2157 | ||
2158 | /* Maybe return `...' next for the end of the invisible text. */ | |
2159 | if (display_ellipsis_p) | |
2160 | { | |
2161 | if (it->dp | |
2162 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2163 | { | |
2164 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2165 | it->dpvec = v->contents; | |
2166 | it->dpend = v->contents + v->size; | |
2167 | } | |
2168 | else | |
2169 | { | |
2170 | /* Default `...'. */ | |
2171 | it->dpvec = default_invis_vector; | |
2172 | it->dpend = default_invis_vector + 3; | |
2173 | } | |
2174 | ||
2175 | /* The ellipsis display does not replace the display of | |
2176 | the character at the new position. Indicate this by | |
2177 | setting IT->dpvec_char_len to zero. */ | |
2178 | it->dpvec_char_len = 0; | |
2179 | ||
2180 | it->current.dpvec_index = 0; | |
2181 | it->method = next_element_from_display_vector; | |
2182 | } | |
2183 | } | |
2184 | } | |
2185 | ||
2186 | return handled; | |
2187 | } | |
2188 | ||
2189 | ||
2190 | \f | |
2191 | /*********************************************************************** | |
2192 | 'display' property | |
2193 | ***********************************************************************/ | |
2194 | ||
2195 | /* Set up iterator IT from `display' property at its current position. | |
2196 | Called from handle_stop. */ | |
2197 | ||
2198 | static enum prop_handled | |
2199 | handle_display_prop (it) | |
2200 | struct it *it; | |
2201 | { | |
2202 | Lisp_Object prop, object; | |
2203 | struct text_pos *position; | |
2204 | int space_or_image_found_p; | |
2205 | ||
2206 | if (STRINGP (it->string)) | |
2207 | { | |
2208 | object = it->string; | |
2209 | position = &it->current.string_pos; | |
2210 | } | |
2211 | else | |
2212 | { | |
2213 | object = Qnil; | |
2214 | position = &it->current.pos; | |
2215 | } | |
2216 | ||
2217 | /* Reset those iterator values set from display property values. */ | |
2218 | it->font_height = Qnil; | |
2219 | it->space_width = Qnil; | |
2220 | it->voffset = 0; | |
2221 | ||
2222 | /* We don't support recursive `display' properties, i.e. string | |
2223 | values that have a string `display' property, that have a string | |
2224 | `display' property etc. */ | |
2225 | if (!it->string_from_display_prop_p) | |
2226 | it->area = TEXT_AREA; | |
2227 | ||
2228 | prop = Fget_char_property (make_number (position->charpos), | |
2229 | Qdisplay, object); | |
2230 | if (NILP (prop)) | |
2231 | return HANDLED_NORMALLY; | |
2232 | ||
2233 | space_or_image_found_p = 0; | |
2234 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
2235 | { | |
2236 | while (CONSP (prop)) | |
2237 | { | |
2238 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2239 | space_or_image_found_p = 1; | |
2240 | prop = XCDR (prop); | |
2241 | } | |
2242 | } | |
2243 | else if (VECTORP (prop)) | |
2244 | { | |
2245 | int i; | |
2246 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2247 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2248 | object, position)) | |
2249 | space_or_image_found_p = 1; | |
2250 | } | |
2251 | else | |
2252 | { | |
2253 | if (handle_single_display_prop (it, prop, object, position)) | |
2254 | space_or_image_found_p = 1; | |
2255 | } | |
2256 | ||
2257 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2258 | } | |
2259 | ||
2260 | ||
2261 | /* Value is the position of the end of the `display' property stating | |
2262 | at START_POS in OBJECT. */ | |
2263 | ||
2264 | static struct text_pos | |
2265 | display_prop_end (it, object, start_pos) | |
2266 | struct it *it; | |
2267 | Lisp_Object object; | |
2268 | struct text_pos start_pos; | |
2269 | { | |
2270 | Lisp_Object end; | |
2271 | struct text_pos end_pos; | |
2272 | ||
2273 | /* Characters having this form of property are not displayed, so | |
2274 | we have to find the end of the property. */ | |
2275 | end = Fnext_single_property_change (make_number (start_pos.charpos), | |
2276 | Qdisplay, object, Qnil); | |
2277 | if (NILP (end)) | |
2278 | { | |
2279 | /* A nil value of `end' means there are no changes of the | |
2280 | property to the end of the buffer or string. */ | |
2281 | if (it->current.overlay_string_index >= 0) | |
2282 | end_pos.charpos = XSTRING (it->string)->size; | |
2283 | else | |
2284 | end_pos.charpos = it->end_charpos; | |
2285 | } | |
2286 | else | |
2287 | end_pos.charpos = XFASTINT (end); | |
2288 | ||
2289 | if (STRINGP (it->string)) | |
2290 | compute_string_pos (&end_pos, start_pos, it->string); | |
2291 | else | |
2292 | end_pos.bytepos = CHAR_TO_BYTE (end_pos.charpos); | |
2293 | ||
2294 | return end_pos; | |
2295 | } | |
2296 | ||
2297 | ||
2298 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2299 | is the object in which the `display' property was found. *POSITION | |
2300 | is the position at which it was found. | |
2301 | ||
2302 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2303 | end position of the `display' property. | |
2304 | ||
2305 | Value is non-zero if a `space' or `image' property value was found. */ | |
2306 | ||
2307 | static int | |
2308 | handle_single_display_prop (it, prop, object, position) | |
2309 | struct it *it; | |
2310 | Lisp_Object prop; | |
2311 | Lisp_Object object; | |
2312 | struct text_pos *position; | |
2313 | { | |
2314 | Lisp_Object value; | |
2315 | int space_or_image_found_p = 0; | |
2316 | ||
2317 | Lisp_Object form; | |
2318 | ||
2319 | /* If PROP is a list of the form `(:when FORM VALUE)', FORM is | |
2320 | evaluated. If the result is nil, VALUE is ignored. */ | |
2321 | form = Qt; | |
2322 | if (CONSP (prop) && EQ (XCAR (prop), QCwhen)) | |
2323 | { | |
2324 | prop = XCDR (prop); | |
2325 | if (!CONSP (prop)) | |
2326 | return 0; | |
2327 | form = XCAR (prop); | |
2328 | prop = XCDR (prop); | |
2329 | if (!CONSP (prop)) | |
2330 | return 0; | |
2331 | prop = XCAR (prop); | |
2332 | } | |
2333 | ||
2334 | if (!NILP (form) && !EQ (form, Qt)) | |
2335 | { | |
2336 | struct gcpro gcpro1; | |
2337 | struct text_pos end_pos, pt; | |
2338 | ||
2339 | end_pos = display_prop_end (it, object, *position); | |
2340 | GCPRO1 (form); | |
2341 | ||
2342 | /* Temporarily set point to the end position, and then evaluate | |
2343 | the form. This makes `(eolp)' work as FORM. */ | |
2344 | CHARPOS (pt) = PT; | |
2345 | BYTEPOS (pt) = PT_BYTE; | |
2346 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2347 | form = eval_form (form); | |
2348 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
2349 | UNGCPRO; | |
2350 | } | |
2351 | ||
2352 | if (NILP (form)) | |
2353 | return 0; | |
2354 | ||
2355 | if (CONSP (prop) | |
2356 | && EQ (XCAR (prop), Qheight) | |
2357 | && CONSP (XCDR (prop))) | |
2358 | { | |
2359 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2360 | return 0; | |
2361 | ||
2362 | /* `(height HEIGHT)'. */ | |
2363 | it->font_height = XCAR (XCDR (prop)); | |
2364 | if (!NILP (it->font_height)) | |
2365 | { | |
2366 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2367 | int new_height = -1; | |
2368 | ||
2369 | if (CONSP (it->font_height) | |
2370 | && (EQ (XCAR (it->font_height), Qplus) | |
2371 | || EQ (XCAR (it->font_height), Qminus)) | |
2372 | && CONSP (XCDR (it->font_height)) | |
2373 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2374 | { | |
2375 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2376 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2377 | if (EQ (XCAR (it->font_height), Qplus)) | |
2378 | steps = - steps; | |
2379 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2380 | } | |
2381 | else if (SYMBOLP (it->font_height)) | |
2382 | { | |
2383 | /* Call function with current height as argument. | |
2384 | Value is the new height. */ | |
2385 | Lisp_Object form, height; | |
2386 | struct gcpro gcpro1; | |
2387 | ||
2388 | height = face->lface[LFACE_HEIGHT_INDEX]; | |
2389 | form = Fcons (it->font_height, Fcons (height, Qnil)); | |
2390 | GCPRO1 (form); | |
2391 | height = eval_form (form); | |
2392 | if (NUMBERP (height)) | |
2393 | new_height = XFLOATINT (height); | |
2394 | UNGCPRO; | |
2395 | } | |
2396 | else if (NUMBERP (it->font_height)) | |
2397 | { | |
2398 | /* Value is a multiple of the canonical char height. */ | |
2399 | struct face *face; | |
2400 | ||
2401 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2402 | new_height = (XFLOATINT (it->font_height) | |
2403 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2404 | } | |
2405 | else | |
2406 | { | |
2407 | /* Evaluate IT->font_height with `height' bound to the | |
2408 | current specified height to get the new height. */ | |
2409 | Lisp_Object value; | |
2410 | int count = specpdl_ptr - specpdl; | |
2411 | ||
2412 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2413 | value = eval_form (it->font_height); | |
2414 | unbind_to (count, Qnil); | |
2415 | ||
2416 | if (NUMBERP (value)) | |
2417 | new_height = XFLOATINT (value); | |
2418 | } | |
2419 | ||
2420 | if (new_height > 0) | |
2421 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2422 | } | |
2423 | } | |
2424 | else if (CONSP (prop) | |
2425 | && EQ (XCAR (prop), Qspace_width) | |
2426 | && CONSP (XCDR (prop))) | |
2427 | { | |
2428 | /* `(space_width WIDTH)'. */ | |
2429 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2430 | return 0; | |
2431 | ||
2432 | value = XCAR (XCDR (prop)); | |
2433 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2434 | it->space_width = value; | |
2435 | } | |
2436 | else if (CONSP (prop) | |
2437 | && EQ (XCAR (prop), Qraise) | |
2438 | && CONSP (XCDR (prop))) | |
2439 | { | |
2440 | #ifdef HAVE_WINDOW_SYSTEM | |
2441 | /* `(raise FACTOR)'. */ | |
2442 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2443 | return 0; | |
2444 | ||
2445 | value = XCAR (XCDR (prop)); | |
2446 | if (NUMBERP (value)) | |
2447 | { | |
2448 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2449 | it->voffset = - (XFLOATINT (value) | |
2450 | * (face->font->ascent + face->font->descent)); | |
2451 | } | |
2452 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2453 | } | |
2454 | else if (!it->string_from_display_prop_p) | |
2455 | { | |
2456 | /* `(left-margin VALUE)' or `(right-margin VALUE) | |
2457 | or `(nil VALUE)' or VALUE. */ | |
2458 | Lisp_Object location, value; | |
2459 | struct text_pos start_pos; | |
2460 | int valid_p; | |
2461 | ||
2462 | /* Characters having this form of property are not displayed, so | |
2463 | we have to find the end of the property. */ | |
2464 | space_or_image_found_p = 1; | |
2465 | start_pos = *position; | |
2466 | *position = display_prop_end (it, object, start_pos); | |
2467 | ||
2468 | /* Let's stop at the new position and assume that all | |
2469 | text properties change there. */ | |
2470 | it->stop_charpos = position->charpos; | |
2471 | ||
2472 | if (CONSP (prop) | |
2473 | && !EQ (XCAR (prop), Qspace) | |
2474 | && !EQ (XCAR (prop), Qimage)) | |
2475 | { | |
2476 | location = XCAR (prop); | |
2477 | value = XCDR (prop); | |
2478 | } | |
2479 | else | |
2480 | { | |
2481 | location = Qnil; | |
2482 | value = prop; | |
2483 | } | |
2484 | ||
2485 | #ifdef HAVE_WINDOW_SYSTEM | |
2486 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2487 | valid_p = STRINGP (value); | |
2488 | else | |
2489 | valid_p = (STRINGP (value) | |
2490 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2491 | || valid_image_p (value)); | |
2492 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2493 | valid_p = STRINGP (value); | |
2494 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2495 | ||
2496 | if ((EQ (location, Qleft_margin) | |
2497 | || EQ (location, Qright_margin) | |
2498 | || NILP (location)) | |
2499 | && valid_p) | |
2500 | { | |
2501 | /* Save current settings of IT so that we can restore them | |
2502 | when we are finished with the glyph property value. */ | |
2503 | push_it (it); | |
2504 | ||
2505 | if (NILP (location)) | |
2506 | it->area = TEXT_AREA; | |
2507 | else if (EQ (location, Qleft_margin)) | |
2508 | it->area = LEFT_MARGIN_AREA; | |
2509 | else | |
2510 | it->area = RIGHT_MARGIN_AREA; | |
2511 | ||
2512 | if (STRINGP (value)) | |
2513 | { | |
2514 | it->string = value; | |
2515 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2516 | it->current.overlay_string_index = -1; | |
2517 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2518 | it->end_charpos = it->string_nchars | |
2519 | = XSTRING (it->string)->size; | |
2520 | it->method = next_element_from_string; | |
2521 | it->stop_charpos = 0; | |
2522 | it->string_from_display_prop_p = 1; | |
2523 | } | |
2524 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2525 | { | |
2526 | it->method = next_element_from_stretch; | |
2527 | it->object = value; | |
2528 | it->current.pos = it->position = start_pos; | |
2529 | } | |
2530 | #ifdef HAVE_WINDOW_SYSTEM | |
2531 | else | |
2532 | { | |
2533 | it->what = IT_IMAGE; | |
2534 | it->image_id = lookup_image (it->f, value); | |
2535 | it->position = start_pos; | |
2536 | it->object = NILP (object) ? it->w->buffer : object; | |
2537 | it->method = next_element_from_image; | |
2538 | ||
2539 | /* Say that we don't have consumed the characters with | |
2540 | `display' property yet. The call to pop_it in | |
2541 | set_iterator_to_next will clean this up. */ | |
2542 | *position = start_pos; | |
2543 | } | |
2544 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2545 | } | |
2546 | } | |
2547 | ||
2548 | return space_or_image_found_p; | |
2549 | } | |
2550 | ||
2551 | ||
2552 | \f | |
2553 | /*********************************************************************** | |
2554 | Overlay strings | |
2555 | ***********************************************************************/ | |
2556 | ||
2557 | /* The following structure is used to record overlay strings for | |
2558 | later sorting in load_overlay_strings. */ | |
2559 | ||
2560 | struct overlay_entry | |
2561 | { | |
2562 | Lisp_Object string; | |
2563 | int priority; | |
2564 | int after_string_p; | |
2565 | }; | |
2566 | ||
2567 | ||
2568 | /* Set up iterator IT from overlay strings at its current position. | |
2569 | Called from handle_stop. */ | |
2570 | ||
2571 | static enum prop_handled | |
2572 | handle_overlay_change (it) | |
2573 | struct it *it; | |
2574 | { | |
2575 | /* Overlays are handled in current_buffer only. */ | |
2576 | if (STRINGP (it->string)) | |
2577 | return HANDLED_NORMALLY; | |
2578 | else | |
2579 | return (get_overlay_strings (it) | |
2580 | ? HANDLED_RECOMPUTE_PROPS | |
2581 | : HANDLED_NORMALLY); | |
2582 | } | |
2583 | ||
2584 | ||
2585 | /* Set up the next overlay string for delivery by IT, if there is an | |
2586 | overlay string to deliver. Called by set_iterator_to_next when the | |
2587 | end of the current overlay string is reached. If there are more | |
2588 | overlay strings to display, IT->string and | |
2589 | IT->current.overlay_string_index are set appropriately here. | |
2590 | Otherwise IT->string is set to nil. */ | |
2591 | ||
2592 | static void | |
2593 | next_overlay_string (it) | |
2594 | struct it *it; | |
2595 | { | |
2596 | ++it->current.overlay_string_index; | |
2597 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2598 | { | |
2599 | /* No more overlay strings. Restore IT's settings to what | |
2600 | they were before overlay strings were processed, and | |
2601 | continue to deliver from current_buffer. */ | |
2602 | pop_it (it); | |
2603 | xassert (it->stop_charpos >= BEGV | |
2604 | && it->stop_charpos <= it->end_charpos); | |
2605 | it->string = Qnil; | |
2606 | it->current.overlay_string_index = -1; | |
2607 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2608 | it->n_overlay_strings = 0; | |
2609 | it->method = next_element_from_buffer; | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | /* There are more overlay strings to process. If | |
2614 | IT->current.overlay_string_index has advanced to a position | |
2615 | where we must load IT->overlay_strings with more strings, do | |
2616 | it. */ | |
2617 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2618 | ||
2619 | if (it->current.overlay_string_index && i == 0) | |
2620 | load_overlay_strings (it); | |
2621 | ||
2622 | /* Initialize IT to deliver display elements from the overlay | |
2623 | string. */ | |
2624 | it->string = it->overlay_strings[i]; | |
2625 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2626 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2627 | it->method = next_element_from_string; | |
2628 | it->stop_charpos = 0; | |
2629 | } | |
2630 | ||
2631 | CHECK_IT (it); | |
2632 | } | |
2633 | ||
2634 | ||
2635 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2636 | comparison function for qsort in load_overlay_strings. Overlay | |
2637 | strings for the same position are sorted so that | |
2638 | ||
2639 | 1. All after-strings come in front of before-strings. | |
2640 | ||
2641 | 2. Within after-strings, strings are sorted so that overlay strings | |
2642 | from overlays with higher priorities come first. | |
2643 | ||
2644 | 2. Within before-strings, strings are sorted so that overlay | |
2645 | strings from overlays with higher priorities come last. | |
2646 | ||
2647 | Value is analogous to strcmp. */ | |
2648 | ||
2649 | ||
2650 | static int | |
2651 | compare_overlay_entries (e1, e2) | |
2652 | void *e1, *e2; | |
2653 | { | |
2654 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2655 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2656 | int result; | |
2657 | ||
2658 | if (entry1->after_string_p != entry2->after_string_p) | |
2659 | /* Let after-strings appear in front of before-strings. */ | |
2660 | result = entry1->after_string_p ? -1 : 1; | |
2661 | else if (entry1->after_string_p) | |
2662 | /* After-strings sorted in order of decreasing priority. */ | |
2663 | result = entry2->priority - entry1->priority; | |
2664 | else | |
2665 | /* Before-strings sorted in order of increasing priority. */ | |
2666 | result = entry1->priority - entry2->priority; | |
2667 | ||
2668 | return result; | |
2669 | } | |
2670 | ||
2671 | ||
2672 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2673 | current buffer position. Set IT->n_overlays to the total number of | |
2674 | overlay strings found. | |
2675 | ||
2676 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2677 | a time. On entry into load_overlay_strings, | |
2678 | IT->current.overlay_string_index gives the number of overlay | |
2679 | strings that have already been loaded by previous calls to this | |
2680 | function. | |
2681 | ||
2682 | Overlay strings are sorted so that after-string strings come in | |
2683 | front of before-string strings. Within before and after-strings, | |
2684 | strings are sorted by overlay priority. See also function | |
2685 | compare_overlay_entries. */ | |
2686 | ||
2687 | static void | |
2688 | load_overlay_strings (it) | |
2689 | struct it *it; | |
2690 | { | |
2691 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2692 | Lisp_Object ov, overlay, window, str; | |
2693 | int start, end; | |
2694 | int size = 20; | |
2695 | int n = 0, i, j; | |
2696 | struct overlay_entry *entries | |
2697 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2698 | ||
2699 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2700 | `entries' which has size `size' and currently contains `n' | |
2701 | elements. AFTER_P non-zero means STRING is an after-string of | |
2702 | OVERLAY. */ | |
2703 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2704 | do \ | |
2705 | { \ | |
2706 | Lisp_Object priority; \ | |
2707 | \ | |
2708 | if (n == size) \ | |
2709 | { \ | |
2710 | int new_size = 2 * size; \ | |
2711 | struct overlay_entry *old = entries; \ | |
2712 | entries = \ | |
2713 | (struct overlay_entry *) alloca (new_size \ | |
2714 | * sizeof *entries); \ | |
2715 | bcopy (old, entries, size * sizeof *entries); \ | |
2716 | size = new_size; \ | |
2717 | } \ | |
2718 | \ | |
2719 | entries[n].string = (STRING); \ | |
2720 | priority = Foverlay_get ((OVERLAY), Qpriority); \ | |
2721 | entries[n].priority \ | |
2722 | = INTEGERP (priority) ? XFASTINT (priority) : 0; \ | |
2723 | entries[n].after_string_p = (AFTER_P); \ | |
2724 | ++n; \ | |
2725 | } \ | |
2726 | while (0) | |
2727 | ||
2728 | /* Process overlay before the overlay center. */ | |
2729 | for (ov = current_buffer->overlays_before; | |
2730 | CONSP (ov); | |
2731 | ov = XCONS (ov)->cdr) | |
2732 | { | |
2733 | overlay = XCONS (ov)->car; | |
2734 | xassert (OVERLAYP (overlay)); | |
2735 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2736 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2737 | ||
2738 | if (end < IT_CHARPOS (*it)) | |
2739 | break; | |
2740 | ||
2741 | /* Skip this overlay if it doesn't start or end at IT's current | |
2742 | position. */ | |
2743 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2744 | continue; | |
2745 | ||
2746 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2747 | window = Foverlay_get (overlay, Qwindow); | |
2748 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2749 | continue; | |
2750 | ||
2751 | /* If overlay has a non-empty before-string, record it. */ | |
2752 | if (start == IT_CHARPOS (*it) | |
2753 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2754 | && XSTRING (str)->size) | |
2755 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2756 | ||
2757 | /* If overlay has a non-empty after-string, record it. */ | |
2758 | if (end == IT_CHARPOS (*it) | |
2759 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2760 | && XSTRING (str)->size) | |
2761 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2762 | } | |
2763 | ||
2764 | /* Process overlays after the overlay center. */ | |
2765 | for (ov = current_buffer->overlays_after; | |
2766 | CONSP (ov); | |
2767 | ov = XCONS (ov)->cdr) | |
2768 | { | |
2769 | overlay = XCONS (ov)->car; | |
2770 | xassert (OVERLAYP (overlay)); | |
2771 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2772 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2773 | ||
2774 | if (start > IT_CHARPOS (*it)) | |
2775 | break; | |
2776 | ||
2777 | /* Skip this overlay if it doesn't start or end at IT's current | |
2778 | position. */ | |
2779 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2780 | continue; | |
2781 | ||
2782 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2783 | window = Foverlay_get (overlay, Qwindow); | |
2784 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2785 | continue; | |
2786 | ||
2787 | /* If overlay has a non-empty before-string, record it. */ | |
2788 | if (start == IT_CHARPOS (*it) | |
2789 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2790 | && XSTRING (str)->size) | |
2791 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2792 | ||
2793 | /* If overlay has a non-empty after-string, record it. */ | |
2794 | if (end == IT_CHARPOS (*it) | |
2795 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2796 | && XSTRING (str)->size) | |
2797 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2798 | } | |
2799 | ||
2800 | #undef RECORD_OVERLAY_STRING | |
2801 | ||
2802 | /* Sort entries. */ | |
2803 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
2804 | ||
2805 | /* Record the total number of strings to process. */ | |
2806 | it->n_overlay_strings = n; | |
2807 | ||
2808 | /* IT->current.overlay_string_index is the number of overlay strings | |
2809 | that have already been consumed by IT. Copy some of the | |
2810 | remaining overlay strings to IT->overlay_strings. */ | |
2811 | i = 0; | |
2812 | j = it->current.overlay_string_index; | |
2813 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
2814 | it->overlay_strings[i++] = entries[j++].string; | |
2815 | ||
2816 | CHECK_IT (it); | |
2817 | } | |
2818 | ||
2819 | ||
2820 | /* Get the first chunk of overlay strings at IT's current buffer | |
2821 | position. Value is non-zero if at least one overlay string was | |
2822 | found. */ | |
2823 | ||
2824 | static int | |
2825 | get_overlay_strings (it) | |
2826 | struct it *it; | |
2827 | { | |
2828 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
2829 | process. This fills IT->overlay_strings with strings, and sets | |
2830 | IT->n_overlay_strings to the total number of strings to process. | |
2831 | IT->pos.overlay_string_index has to be set temporarily to zero | |
2832 | because load_overlay_strings needs this; it must be set to -1 | |
2833 | when no overlay strings are found because a zero value would | |
2834 | indicate a position in the first overlay string. */ | |
2835 | it->current.overlay_string_index = 0; | |
2836 | load_overlay_strings (it); | |
2837 | ||
2838 | /* If we found overlay strings, set up IT to deliver display | |
2839 | elements from the first one. Otherwise set up IT to deliver | |
2840 | from current_buffer. */ | |
2841 | if (it->n_overlay_strings) | |
2842 | { | |
2843 | /* Make sure we know settings in current_buffer, so that we can | |
2844 | restore meaningful values when we're done with the overlay | |
2845 | strings. */ | |
2846 | compute_stop_pos (it); | |
2847 | xassert (it->face_id >= 0); | |
2848 | ||
2849 | /* Save IT's settings. They are restored after all overlay | |
2850 | strings have been processed. */ | |
2851 | xassert (it->sp == 0); | |
2852 | push_it (it); | |
2853 | ||
2854 | /* Set up IT to deliver display elements from the first overlay | |
2855 | string. */ | |
2856 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2857 | it->stop_charpos = 0; | |
2858 | it->string = it->overlay_strings[0]; | |
2859 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2860 | xassert (STRINGP (it->string)); | |
2861 | it->method = next_element_from_string; | |
2862 | } | |
2863 | else | |
2864 | { | |
2865 | it->string = Qnil; | |
2866 | it->current.overlay_string_index = -1; | |
2867 | it->method = next_element_from_buffer; | |
2868 | } | |
2869 | ||
2870 | CHECK_IT (it); | |
2871 | ||
2872 | /* Value is non-zero if we found at least one overlay string. */ | |
2873 | return STRINGP (it->string); | |
2874 | } | |
2875 | ||
2876 | ||
2877 | \f | |
2878 | /*********************************************************************** | |
2879 | Saving and restoring state | |
2880 | ***********************************************************************/ | |
2881 | ||
2882 | /* Save current settings of IT on IT->stack. Called, for example, | |
2883 | before setting up IT for an overlay string, to be able to restore | |
2884 | IT's settings to what they were after the overlay string has been | |
2885 | processed. */ | |
2886 | ||
2887 | static void | |
2888 | push_it (it) | |
2889 | struct it *it; | |
2890 | { | |
2891 | struct iterator_stack_entry *p; | |
2892 | ||
2893 | xassert (it->sp < 2); | |
2894 | p = it->stack + it->sp; | |
2895 | ||
2896 | p->stop_charpos = it->stop_charpos; | |
2897 | xassert (it->face_id >= 0); | |
2898 | p->face_id = it->face_id; | |
2899 | p->string = it->string; | |
2900 | p->pos = it->current; | |
2901 | p->end_charpos = it->end_charpos; | |
2902 | p->string_nchars = it->string_nchars; | |
2903 | p->area = it->area; | |
2904 | p->multibyte_p = it->multibyte_p; | |
2905 | p->space_width = it->space_width; | |
2906 | p->font_height = it->font_height; | |
2907 | p->voffset = it->voffset; | |
2908 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
2909 | ++it->sp; | |
2910 | } | |
2911 | ||
2912 | ||
2913 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
2914 | more overlay strings must be processed, and we return to delivering | |
2915 | display elements from a buffer, or when the end of a string from a | |
2916 | `display' property is reached and we return to delivering display | |
2917 | elements from an overlay string, or from a buffer. */ | |
2918 | ||
2919 | static void | |
2920 | pop_it (it) | |
2921 | struct it *it; | |
2922 | { | |
2923 | struct iterator_stack_entry *p; | |
2924 | ||
2925 | xassert (it->sp > 0); | |
2926 | --it->sp; | |
2927 | p = it->stack + it->sp; | |
2928 | it->stop_charpos = p->stop_charpos; | |
2929 | it->face_id = p->face_id; | |
2930 | it->string = p->string; | |
2931 | it->current = p->pos; | |
2932 | it->end_charpos = p->end_charpos; | |
2933 | it->string_nchars = p->string_nchars; | |
2934 | it->area = p->area; | |
2935 | it->multibyte_p = p->multibyte_p; | |
2936 | it->space_width = p->space_width; | |
2937 | it->font_height = p->font_height; | |
2938 | it->voffset = p->voffset; | |
2939 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
2940 | } | |
2941 | ||
2942 | ||
2943 | \f | |
2944 | /*********************************************************************** | |
2945 | Moving over lines | |
2946 | ***********************************************************************/ | |
2947 | ||
2948 | /* Set IT's current position to the previous line start. */ | |
2949 | ||
2950 | static void | |
2951 | back_to_previous_line_start (it) | |
2952 | struct it *it; | |
2953 | { | |
2954 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
2955 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2956 | } | |
2957 | ||
2958 | ||
2959 | /* Set IT's current position to the next line start. */ | |
2960 | ||
2961 | static void | |
2962 | forward_to_next_line_start (it) | |
2963 | struct it *it; | |
2964 | { | |
2965 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
2966 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2967 | } | |
2968 | ||
2969 | ||
2970 | /* Set IT's current position to the previous visible line start. Skip | |
2971 | invisible text that is so either due to text properties or due to | |
2972 | selective display. Caution: this does not change IT->current_x and | |
2973 | IT->hpos. */ | |
2974 | ||
2975 | static void | |
2976 | back_to_previous_visible_line_start (it) | |
2977 | struct it *it; | |
2978 | { | |
2979 | int visible_p = 0; | |
2980 | ||
2981 | /* Go back one newline if not on BEGV already. */ | |
2982 | if (IT_CHARPOS (*it) > BEGV) | |
2983 | back_to_previous_line_start (it); | |
2984 | ||
2985 | /* Move over lines that are invisible because of selective display | |
2986 | or text properties. */ | |
2987 | while (IT_CHARPOS (*it) > BEGV | |
2988 | && !visible_p) | |
2989 | { | |
2990 | visible_p = 1; | |
2991 | ||
2992 | /* If selective > 0, then lines indented more than that values | |
2993 | are invisible. */ | |
2994 | if (it->selective > 0 | |
2995 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
2996 | it->selective)) | |
2997 | visible_p = 0; | |
2998 | #ifdef USE_TEXT_PROPERTIES | |
2999 | else | |
3000 | { | |
3001 | Lisp_Object prop; | |
3002 | ||
3003 | prop = Fget_char_property (IT_CHARPOS (*it), Qinvisible, it->window); | |
3004 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
3005 | visible_p = 0; | |
3006 | } | |
3007 | #endif /* USE_TEXT_PROPERTIES */ | |
3008 | ||
3009 | /* Back one more newline if the current one is invisible. */ | |
3010 | if (!visible_p) | |
3011 | back_to_previous_line_start (it); | |
3012 | } | |
3013 | ||
3014 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3015 | xassert (IT_CHARPOS (*it) == BEGV | |
3016 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3017 | CHECK_IT (it); | |
3018 | } | |
3019 | ||
3020 | ||
3021 | /* Reseat iterator IT at the previous visible line start. Skip | |
3022 | invisible text that is so either due to text properties or due to | |
3023 | selective display. At the end, update IT's overlay information, | |
3024 | face information etc. */ | |
3025 | ||
3026 | static void | |
3027 | reseat_at_previous_visible_line_start (it) | |
3028 | struct it *it; | |
3029 | { | |
3030 | back_to_previous_visible_line_start (it); | |
3031 | reseat (it, it->current.pos, 1); | |
3032 | CHECK_IT (it); | |
3033 | } | |
3034 | ||
3035 | ||
3036 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3037 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3038 | preceding the line start. Skip over invisible text that is so | |
3039 | because of selective display. Compute faces, overlays etc at the | |
3040 | new position. Note that this function does not skip over text that | |
3041 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3042 | |
3043 | static void | |
312246d1 | 3044 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3045 | struct it *it; |
312246d1 | 3046 | int on_newline_p; |
5f5c8ee5 GM |
3047 | { |
3048 | /* Restore the buffer position when currently not delivering display | |
3049 | elements from the current buffer. This is the case, for example, | |
3050 | when called at the end of a truncated overlay string. */ | |
3051 | while (it->sp) | |
3052 | pop_it (it); | |
3053 | it->method = next_element_from_buffer; | |
3054 | ||
3055 | /* Otherwise, scan_buffer would not work. */ | |
3056 | if (IT_CHARPOS (*it) < ZV) | |
3057 | { | |
3058 | /* If on a newline, advance past it. Otherwise, find the next | |
3059 | newline which automatically gives us the position following | |
3060 | the newline. */ | |
3061 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3062 | { | |
3063 | ++IT_CHARPOS (*it); | |
3064 | ++IT_BYTEPOS (*it); | |
3065 | } | |
3066 | else | |
3067 | forward_to_next_line_start (it); | |
3068 | ||
3069 | /* We must either have reached the end of the buffer or end up | |
3070 | after a newline. */ | |
3071 | xassert (IT_CHARPOS (*it) == ZV | |
3072 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3073 | ||
3074 | /* Skip over lines that are invisible because they are indented | |
3075 | more than the value of IT->selective. */ | |
3076 | if (it->selective > 0) | |
3077 | while (IT_CHARPOS (*it) < ZV | |
3078 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3079 | it->selective)) | |
3080 | forward_to_next_line_start (it); | |
312246d1 GM |
3081 | |
3082 | /* Position on the newline if we should. */ | |
3083 | if (on_newline_p && IT_CHARPOS (*it) > BEGV) | |
3084 | { | |
3085 | --IT_CHARPOS (*it); | |
3086 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3087 | } | |
5f5c8ee5 GM |
3088 | |
3089 | /* Set the iterator there. The 0 as the last parameter of | |
3090 | reseat means don't force a text property lookup. The lookup | |
3091 | is then only done if we've skipped past the iterator's | |
3092 | check_charpos'es. This optimization is important because | |
3093 | text property lookups tend to be expensive. */ | |
3094 | reseat (it, it->current.pos, 0); | |
3095 | } | |
3096 | ||
3097 | CHECK_IT (it); | |
3098 | } | |
3099 | ||
3100 | ||
3101 | \f | |
3102 | /*********************************************************************** | |
3103 | Changing an iterator's position | |
3104 | ***********************************************************************/ | |
3105 | ||
3106 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3107 | is non-zero, always check for text properties at the new position. | |
3108 | Otherwise, text properties are only looked up if POS >= | |
3109 | IT->check_charpos of a property. */ | |
3110 | ||
3111 | static void | |
3112 | reseat (it, pos, force_p) | |
3113 | struct it *it; | |
3114 | struct text_pos pos; | |
3115 | int force_p; | |
3116 | { | |
3117 | int original_pos = IT_CHARPOS (*it); | |
3118 | ||
3119 | reseat_1 (it, pos, 0); | |
3120 | ||
3121 | /* Determine where to check text properties. Avoid doing it | |
3122 | where possible because text property lookup is very expensive. */ | |
3123 | if (force_p | |
3124 | || CHARPOS (pos) > it->stop_charpos | |
3125 | || CHARPOS (pos) < original_pos) | |
3126 | handle_stop (it); | |
3127 | ||
3128 | CHECK_IT (it); | |
3129 | } | |
3130 | ||
3131 | ||
3132 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3133 | IT->stop_pos to POS, also. */ | |
3134 | ||
3135 | static void | |
3136 | reseat_1 (it, pos, set_stop_p) | |
3137 | struct it *it; | |
3138 | struct text_pos pos; | |
3139 | int set_stop_p; | |
3140 | { | |
3141 | /* Don't call this function when scanning a C string. */ | |
3142 | xassert (it->s == NULL); | |
3143 | ||
3144 | /* POS must be a reasonable value. */ | |
3145 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3146 | ||
3147 | it->current.pos = it->position = pos; | |
3148 | XSETBUFFER (it->object, current_buffer); | |
3149 | it->dpvec = NULL; | |
3150 | it->current.dpvec_index = -1; | |
3151 | it->current.overlay_string_index = -1; | |
3152 | IT_STRING_CHARPOS (*it) = -1; | |
3153 | IT_STRING_BYTEPOS (*it) = -1; | |
3154 | it->string = Qnil; | |
3155 | it->method = next_element_from_buffer; | |
3156 | it->sp = 0; | |
3157 | ||
3158 | if (set_stop_p) | |
3159 | it->stop_charpos = CHARPOS (pos); | |
3160 | } | |
3161 | ||
3162 | ||
3163 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3164 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3165 | STRING gives a Lisp string to iterate over. | |
3166 | ||
3167 | If PRECISION > 0, don't return more then PRECISION number of | |
3168 | characters from the string. | |
3169 | ||
3170 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3171 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3172 | field width. | |
3173 | ||
3174 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3175 | MULTIBYTE > 0 means enable it, | |
3176 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3177 | ||
3178 | IT must be initialized via a prior call to init_iterator before | |
3179 | calling this function. */ | |
3180 | ||
3181 | static void | |
3182 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3183 | struct it *it; | |
3184 | unsigned char *s; | |
3185 | Lisp_Object string; | |
3186 | int charpos; | |
3187 | int precision, field_width, multibyte; | |
3188 | { | |
3189 | /* No region in strings. */ | |
3190 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3191 | ||
3192 | /* No text property checks performed by default, but see below. */ | |
3193 | it->stop_charpos = -1; | |
3194 | ||
3195 | /* Set iterator position and end position. */ | |
3196 | bzero (&it->current, sizeof it->current); | |
3197 | it->current.overlay_string_index = -1; | |
3198 | it->current.dpvec_index = -1; | |
3199 | it->charset = CHARSET_ASCII; | |
3200 | xassert (charpos >= 0); | |
3201 | ||
3202 | /* Use the setting of MULTIBYTE if specified. */ | |
3203 | if (multibyte >= 0) | |
3204 | it->multibyte_p = multibyte > 0; | |
3205 | ||
3206 | if (s == NULL) | |
3207 | { | |
3208 | xassert (STRINGP (string)); | |
3209 | it->string = string; | |
3210 | it->s = NULL; | |
3211 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3212 | it->method = next_element_from_string; | |
3213 | it->current.string_pos = string_pos (charpos, string); | |
3214 | } | |
3215 | else | |
3216 | { | |
3217 | it->s = s; | |
3218 | it->string = Qnil; | |
3219 | ||
3220 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3221 | for displaying C strings. */ | |
3222 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3223 | if (it->multibyte_p) | |
3224 | { | |
3225 | it->current.pos = c_string_pos (charpos, s, 1); | |
3226 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3227 | } | |
3228 | else | |
3229 | { | |
3230 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3231 | it->end_charpos = it->string_nchars = strlen (s); | |
3232 | } | |
3233 | ||
3234 | it->method = next_element_from_c_string; | |
3235 | } | |
3236 | ||
3237 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3238 | from the string. */ | |
3239 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3240 | it->end_charpos = it->string_nchars = charpos + precision; | |
3241 | ||
3242 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3243 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3244 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3245 | padding with `-' at the end of a mode line. */ | |
3246 | if (field_width < 0) | |
3247 | field_width = INFINITY; | |
3248 | if (field_width > it->end_charpos - charpos) | |
3249 | it->end_charpos = charpos + field_width; | |
3250 | ||
3251 | /* Use the standard display table for displaying strings. */ | |
3252 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3253 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3254 | ||
3255 | it->stop_charpos = charpos; | |
3256 | CHECK_IT (it); | |
3257 | } | |
3258 | ||
3259 | ||
3260 | \f | |
3261 | /*********************************************************************** | |
3262 | Iteration | |
3263 | ***********************************************************************/ | |
3264 | ||
3265 | /* Load IT's display element fields with information about the next | |
3266 | display element from the current position of IT. Value is zero if | |
3267 | end of buffer (or C string) is reached. */ | |
3268 | ||
3269 | int | |
3270 | get_next_display_element (it) | |
3271 | struct it *it; | |
3272 | { | |
3273 | /* Non-zero means that we found an display element. Zero means that | |
3274 | we hit the end of what we iterate over. Performance note: the | |
3275 | function pointer `method' used here turns out to be faster than | |
3276 | using a sequence of if-statements. */ | |
3277 | int success_p = (*it->method) (it); | |
3278 | int charset; | |
3279 | ||
3280 | if (it->what == IT_CHARACTER) | |
3281 | { | |
3282 | /* Map via display table or translate control characters. | |
3283 | IT->c, IT->len etc. have been set to the next character by | |
3284 | the function call above. If we have a display table, and it | |
3285 | contains an entry for IT->c, translate it. Don't do this if | |
3286 | IT->c itself comes from a display table, otherwise we could | |
3287 | end up in an infinite recursion. (An alternative could be to | |
3288 | count the recursion depth of this function and signal an | |
3289 | error when a certain maximum depth is reached.) Is it worth | |
3290 | it? */ | |
3291 | if (success_p && it->dpvec == NULL) | |
3292 | { | |
3293 | Lisp_Object dv; | |
3294 | ||
3295 | if (it->dp | |
3296 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3297 | VECTORP (dv))) | |
3298 | { | |
3299 | struct Lisp_Vector *v = XVECTOR (dv); | |
3300 | ||
3301 | /* Return the first character from the display table | |
3302 | entry, if not empty. If empty, don't display the | |
3303 | current character. */ | |
3304 | if (v->size) | |
3305 | { | |
3306 | it->dpvec_char_len = it->len; | |
3307 | it->dpvec = v->contents; | |
3308 | it->dpend = v->contents + v->size; | |
3309 | it->current.dpvec_index = 0; | |
3310 | it->method = next_element_from_display_vector; | |
3311 | } | |
3312 | ||
3313 | success_p = get_next_display_element (it); | |
3314 | } | |
3315 | ||
3316 | /* Translate control characters into `\003' or `^C' form. | |
3317 | Control characters coming from a display table entry are | |
3318 | currently not translated because we use IT->dpvec to hold | |
3319 | the translation. This could easily be changed but I | |
3320 | don't believe that it is worth doing. */ | |
3321 | else if ((it->c < ' ' | |
3322 | && (it->area != TEXT_AREA | |
3323 | || (it->c != '\n' | |
3324 | && it->c != '\t' | |
3325 | && it->c != '\r'))) | |
54c85a23 | 3326 | || (it->c >= 127 |
5f5c8ee5 GM |
3327 | && it->len == 1)) |
3328 | { | |
3329 | /* IT->c is a control character which must be displayed | |
3330 | either as '\003' or as `^C' where the '\\' and '^' | |
3331 | can be defined in the display table. Fill | |
3332 | IT->ctl_chars with glyphs for what we have to | |
3333 | display. Then, set IT->dpvec to these glyphs. */ | |
3334 | GLYPH g; | |
3335 | ||
54c85a23 | 3336 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3337 | { |
3338 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3339 | if (it->dp | |
3340 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3341 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3342 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3343 | else | |
3344 | g = FAST_MAKE_GLYPH ('^', 0); | |
3345 | XSETINT (it->ctl_chars[0], g); | |
3346 | ||
3347 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3348 | XSETINT (it->ctl_chars[1], g); | |
3349 | ||
3350 | /* Set up IT->dpvec and return first character from it. */ | |
3351 | it->dpvec_char_len = it->len; | |
3352 | it->dpvec = it->ctl_chars; | |
3353 | it->dpend = it->dpvec + 2; | |
3354 | it->current.dpvec_index = 0; | |
3355 | it->method = next_element_from_display_vector; | |
3356 | get_next_display_element (it); | |
3357 | } | |
3358 | else | |
3359 | { | |
3360 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ | |
3361 | if (it->dp | |
3362 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3363 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
3364 | g = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); | |
3365 | else | |
3366 | g = FAST_MAKE_GLYPH ('\\', 0); | |
3367 | XSETINT (it->ctl_chars[0], g); | |
3368 | ||
3369 | /* Insert three more glyphs into IT->ctl_chars for | |
3370 | the octal display of the character. */ | |
3371 | g = FAST_MAKE_GLYPH (((it->c >> 6) & 7) + '0', 0); | |
3372 | XSETINT (it->ctl_chars[1], g); | |
3373 | g = FAST_MAKE_GLYPH (((it->c >> 3) & 7) + '0', 0); | |
3374 | XSETINT (it->ctl_chars[2], g); | |
3375 | g = FAST_MAKE_GLYPH ((it->c & 7) + '0', 0); | |
3376 | XSETINT (it->ctl_chars[3], g); | |
3377 | ||
3378 | /* Set up IT->dpvec and return the first character | |
3379 | from it. */ | |
3380 | it->dpvec_char_len = it->len; | |
3381 | it->dpvec = it->ctl_chars; | |
3382 | it->dpend = it->dpvec + 4; | |
3383 | it->current.dpvec_index = 0; | |
3384 | it->method = next_element_from_display_vector; | |
3385 | get_next_display_element (it); | |
3386 | } | |
3387 | } | |
3388 | } | |
3389 | ||
3390 | /* Adjust face id if charset changes. There are no charset | |
3391 | changes in unibyte text because Emacs' charsets are not | |
3392 | applicable there. */ | |
3393 | if (it->multibyte_p | |
3394 | && success_p | |
3395 | && (charset = CHAR_CHARSET (it->c), | |
3396 | charset != it->charset)) | |
3397 | { | |
3398 | it->charset = charset; | |
3399 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, charset); | |
3400 | } | |
3401 | } | |
3402 | ||
3403 | /* Is this character the last one of a run of characters with | |
3404 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3405 | if (it->face_box_p | |
3406 | && it->s == NULL) | |
3407 | { | |
3408 | int face_id; | |
3409 | struct face *face; | |
3410 | ||
3411 | it->end_of_box_run_p | |
3412 | = ((face_id = face_after_it_pos (it), | |
3413 | face_id != it->face_id) | |
3414 | && (face = FACE_FROM_ID (it->f, face_id), | |
3415 | face->box == FACE_NO_BOX)); | |
3416 | } | |
3417 | ||
3418 | /* Value is 0 if end of buffer or string reached. */ | |
3419 | return success_p; | |
3420 | } | |
3421 | ||
3422 | ||
3423 | /* Move IT to the next display element. | |
3424 | ||
3425 | Functions get_next_display_element and set_iterator_to_next are | |
3426 | separate because I find this arrangement easier to handle than a | |
3427 | get_next_display_element function that also increments IT's | |
3428 | position. The way it is we can first look at an iterator's current | |
3429 | display element, decide whether it fits on a line, and if it does, | |
3430 | increment the iterator position. The other way around we probably | |
3431 | would either need a flag indicating whether the iterator has to be | |
3432 | incremented the next time, or we would have to implement a | |
3433 | decrement position function which would not be easy to write. */ | |
3434 | ||
3435 | void | |
3436 | set_iterator_to_next (it) | |
3437 | struct it *it; | |
3438 | { | |
3439 | if (it->method == next_element_from_buffer) | |
3440 | { | |
3441 | /* The current display element of IT is a character from | |
3442 | current_buffer. Advance in the buffer, and maybe skip over | |
3443 | invisible lines that are so because of selective display. */ | |
3444 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3445 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3446 | else |
3447 | { | |
3448 | xassert (it->len != 0); | |
3449 | IT_BYTEPOS (*it) += it->len; | |
3450 | IT_CHARPOS (*it) += 1; | |
3451 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3452 | } | |
3453 | } | |
3454 | else if (it->method == next_element_from_c_string) | |
3455 | { | |
3456 | /* Current display element of IT is from a C string. */ | |
3457 | IT_BYTEPOS (*it) += it->len; | |
3458 | IT_CHARPOS (*it) += 1; | |
3459 | } | |
3460 | else if (it->method == next_element_from_display_vector) | |
3461 | { | |
3462 | /* Current display element of IT is from a display table entry. | |
3463 | Advance in the display table definition. Reset it to null if | |
3464 | end reached, and continue with characters from buffers/ | |
3465 | strings. */ | |
286bcbc9 GM |
3466 | struct face *face; |
3467 | ||
5f5c8ee5 | 3468 | ++it->current.dpvec_index; |
286bcbc9 GM |
3469 | |
3470 | /* Restore face and charset of the iterator to what they were | |
3471 | before the display vector entry (these entries may contain | |
3472 | faces, and of course characters of different charsets). */ | |
5f5c8ee5 | 3473 | it->face_id = it->saved_face_id; |
286bcbc9 GM |
3474 | it->charset = FACE_FROM_ID (it->f, it->face_id)->charset; |
3475 | ||
5f5c8ee5 GM |
3476 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3477 | { | |
3478 | if (it->s) | |
3479 | it->method = next_element_from_c_string; | |
3480 | else if (STRINGP (it->string)) | |
3481 | it->method = next_element_from_string; | |
3482 | else | |
3483 | it->method = next_element_from_buffer; | |
3484 | ||
3485 | it->dpvec = NULL; | |
3486 | it->current.dpvec_index = -1; | |
3487 | ||
312246d1 GM |
3488 | /* Skip over characters which were displayed via IT->dpvec. */ |
3489 | if (it->dpvec_char_len < 0) | |
3490 | reseat_at_next_visible_line_start (it, 1); | |
3491 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3492 | { |
3493 | it->len = it->dpvec_char_len; | |
3494 | set_iterator_to_next (it); | |
3495 | } | |
3496 | } | |
3497 | } | |
3498 | else if (it->method == next_element_from_string) | |
3499 | { | |
3500 | /* Current display element is a character from a Lisp string. */ | |
3501 | xassert (it->s == NULL && STRINGP (it->string)); | |
3502 | IT_STRING_BYTEPOS (*it) += it->len; | |
3503 | IT_STRING_CHARPOS (*it) += 1; | |
3504 | ||
3505 | consider_string_end: | |
3506 | ||
3507 | if (it->current.overlay_string_index >= 0) | |
3508 | { | |
3509 | /* IT->string is an overlay string. Advance to the | |
3510 | next, if there is one. */ | |
3511 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3512 | next_overlay_string (it); | |
3513 | } | |
3514 | else | |
3515 | { | |
3516 | /* IT->string is not an overlay string. If we reached | |
3517 | its end, and there is something on IT->stack, proceed | |
3518 | with what is on the stack. This can be either another | |
3519 | string, this time an overlay string, or a buffer. */ | |
3520 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3521 | && it->sp > 0) | |
3522 | { | |
3523 | pop_it (it); | |
3524 | if (!STRINGP (it->string)) | |
3525 | it->method = next_element_from_buffer; | |
3526 | } | |
3527 | } | |
3528 | } | |
3529 | else if (it->method == next_element_from_image | |
3530 | || it->method == next_element_from_stretch) | |
3531 | { | |
3532 | /* The position etc with which we have to proceed are on | |
3533 | the stack. The position may be at the end of a string, | |
3534 | if the `display' property takes up the whole string. */ | |
3535 | pop_it (it); | |
3536 | it->image_id = 0; | |
3537 | if (STRINGP (it->string)) | |
3538 | { | |
3539 | it->method = next_element_from_string; | |
3540 | goto consider_string_end; | |
3541 | } | |
3542 | else | |
3543 | it->method = next_element_from_buffer; | |
3544 | } | |
3545 | else | |
3546 | /* There are no other methods defined, so this should be a bug. */ | |
3547 | abort (); | |
3548 | ||
3549 | /* Reset flags indicating start and end of a sequence of | |
3550 | characters with box. */ | |
3551 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3552 | ||
3553 | xassert (it->method != next_element_from_string | |
3554 | || (STRINGP (it->string) | |
3555 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3556 | } | |
3557 | ||
3558 | ||
3559 | /* Load IT's display element fields with information about the next | |
3560 | display element which comes from a display table entry or from the | |
3561 | result of translating a control character to one of the forms `^C' | |
3562 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3563 | ||
3564 | static int | |
3565 | next_element_from_display_vector (it) | |
3566 | struct it *it; | |
3567 | { | |
3568 | /* Precondition. */ | |
3569 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3570 | ||
3571 | /* Remember the current face id in case glyphs specify faces. | |
3572 | IT's face is restored in set_iterator_to_next. */ | |
3573 | it->saved_face_id = it->face_id; | |
3574 | ||
3575 | if (INTEGERP (*it->dpvec) | |
3576 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3577 | { | |
3578 | int lface_id; | |
3579 | GLYPH g; | |
3580 | ||
3581 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3582 | it->c = FAST_GLYPH_CHAR (g); | |
3583 | it->len = CHAR_LEN (it->c); | |
3584 | ||
3585 | /* The entry may contain a face id to use. Such a face id is | |
3586 | the id of a Lisp face, not a realized face. A face id of | |
3587 | zero means no face. */ | |
3588 | lface_id = FAST_GLYPH_FACE (g); | |
3589 | if (lface_id) | |
3590 | { | |
3591 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); | |
3592 | if (face_id >= 0) | |
3593 | { | |
3594 | it->face_id = face_id; | |
3595 | it->charset = CHARSET_ASCII; | |
3596 | } | |
3597 | } | |
3598 | } | |
3599 | else | |
3600 | /* Display table entry is invalid. Return a space. */ | |
3601 | it->c = ' ', it->len = 1; | |
3602 | ||
3603 | /* Don't change position and object of the iterator here. They are | |
3604 | still the values of the character that had this display table | |
3605 | entry or was translated, and that's what we want. */ | |
3606 | it->what = IT_CHARACTER; | |
3607 | return 1; | |
3608 | } | |
3609 | ||
3610 | ||
3611 | /* Load IT with the next display element from Lisp string IT->string. | |
3612 | IT->current.string_pos is the current position within the string. | |
3613 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3614 | overlay string. */ | |
3615 | ||
3616 | static int | |
3617 | next_element_from_string (it) | |
3618 | struct it *it; | |
3619 | { | |
3620 | struct text_pos position; | |
3621 | ||
3622 | xassert (STRINGP (it->string)); | |
3623 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3624 | position = it->current.string_pos; | |
3625 | ||
3626 | /* Time to check for invisible text? */ | |
3627 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3628 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3629 | { | |
3630 | handle_stop (it); | |
3631 | ||
3632 | /* Since a handler may have changed IT->method, we must | |
3633 | recurse here. */ | |
3634 | return get_next_display_element (it); | |
3635 | } | |
3636 | ||
3637 | if (it->current.overlay_string_index >= 0) | |
3638 | { | |
3639 | /* Get the next character from an overlay string. In overlay | |
3640 | strings, There is no field width or padding with spaces to | |
3641 | do. */ | |
3642 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3643 | { | |
3644 | it->what = IT_EOB; | |
3645 | return 0; | |
3646 | } | |
3647 | else if (STRING_MULTIBYTE (it->string)) | |
3648 | { | |
3649 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3650 | - IT_STRING_BYTEPOS (*it)); | |
3651 | unsigned char *s = (XSTRING (it->string)->data | |
3652 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3653 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3654 | } |
3655 | else | |
3656 | { | |
3657 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3658 | it->len = 1; | |
3659 | } | |
3660 | } | |
3661 | else | |
3662 | { | |
3663 | /* Get the next character from a Lisp string that is not an | |
3664 | overlay string. Such strings come from the mode line, for | |
3665 | example. We may have to pad with spaces, or truncate the | |
3666 | string. See also next_element_from_c_string. */ | |
3667 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3668 | { | |
3669 | it->what = IT_EOB; | |
3670 | return 0; | |
3671 | } | |
3672 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3673 | { | |
3674 | /* Pad with spaces. */ | |
3675 | it->c = ' ', it->len = 1; | |
3676 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3677 | } | |
3678 | else if (STRING_MULTIBYTE (it->string)) | |
3679 | { | |
3680 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3681 | - IT_STRING_BYTEPOS (*it)); | |
3682 | unsigned char *s = (XSTRING (it->string)->data | |
3683 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3684 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3685 | } |
3686 | else | |
3687 | { | |
3688 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3689 | it->len = 1; | |
3690 | } | |
3691 | } | |
3692 | ||
3693 | /* Record what we have and where it came from. Note that we store a | |
3694 | buffer position in IT->position although it could arguably be a | |
3695 | string position. */ | |
3696 | it->what = IT_CHARACTER; | |
3697 | it->object = it->string; | |
3698 | it->position = position; | |
3699 | return 1; | |
3700 | } | |
3701 | ||
3702 | ||
3703 | /* Load IT with next display element from C string IT->s. | |
3704 | IT->string_nchars is the maximum number of characters to return | |
3705 | from the string. IT->end_charpos may be greater than | |
3706 | IT->string_nchars when this function is called, in which case we | |
3707 | may have to return padding spaces. Value is zero if end of string | |
3708 | reached, including padding spaces. */ | |
3709 | ||
3710 | static int | |
3711 | next_element_from_c_string (it) | |
3712 | struct it *it; | |
3713 | { | |
3714 | int success_p = 1; | |
3715 | ||
3716 | xassert (it->s); | |
3717 | it->what = IT_CHARACTER; | |
3718 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
3719 | it->object = Qnil; | |
3720 | ||
3721 | /* IT's position can be greater IT->string_nchars in case a field | |
3722 | width or precision has been specified when the iterator was | |
3723 | initialized. */ | |
3724 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3725 | { | |
3726 | /* End of the game. */ | |
3727 | it->what = IT_EOB; | |
3728 | success_p = 0; | |
3729 | } | |
3730 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
3731 | { | |
3732 | /* Pad with spaces. */ | |
3733 | it->c = ' ', it->len = 1; | |
3734 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
3735 | } | |
3736 | else if (it->multibyte_p) | |
3737 | { | |
3738 | /* Implementation note: The calls to strlen apparently aren't a | |
3739 | performance problem because there is no noticeable performance | |
3740 | difference between Emacs running in unibyte or multibyte mode. */ | |
3741 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
3742 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
3743 | maxlen, &it->len); | |
5f5c8ee5 GM |
3744 | } |
3745 | else | |
3746 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
3747 | ||
3748 | return success_p; | |
3749 | } | |
3750 | ||
3751 | ||
3752 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
3753 | The definition of the ellipsis glyphs may come from a display table | |
3754 | entry. This function Fills IT with the first glyph from the | |
3755 | ellipsis if an ellipsis is to be displayed. */ | |
3756 | ||
3757 | static void | |
3758 | next_element_from_ellipsis (it) | |
3759 | struct it *it; | |
3760 | { | |
3761 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
3762 | { | |
3763 | /* Use the display table definition for `...'. Invalid glyphs | |
3764 | will be handled by the method returning elements from dpvec. */ | |
3765 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3766 | it->dpvec_char_len = it->len; | |
3767 | it->dpvec = v->contents; | |
3768 | it->dpend = v->contents + v->size; | |
3769 | it->current.dpvec_index = 0; | |
3770 | it->method = next_element_from_display_vector; | |
3771 | get_next_display_element (it); | |
3772 | } | |
3773 | else if (it->selective_display_ellipsis_p) | |
3774 | { | |
3775 | /* Use default `...' which is stored in default_invis_vector. */ | |
3776 | it->dpvec_char_len = it->len; | |
3777 | it->dpvec = default_invis_vector; | |
3778 | it->dpend = default_invis_vector + 3; | |
3779 | it->current.dpvec_index = 0; | |
3780 | it->method = next_element_from_display_vector; | |
3781 | get_next_display_element (it); | |
3782 | } | |
3783 | } | |
3784 | ||
3785 | ||
3786 | /* Deliver an image display element. The iterator IT is already | |
3787 | filled with image information (done in handle_display_prop). Value | |
3788 | is always 1. */ | |
3789 | ||
3790 | ||
3791 | static int | |
3792 | next_element_from_image (it) | |
3793 | struct it *it; | |
3794 | { | |
3795 | it->what = IT_IMAGE; | |
3796 | return 1; | |
3797 | } | |
3798 | ||
3799 | ||
3800 | /* Fill iterator IT with next display element from a stretch glyph | |
3801 | property. IT->object is the value of the text property. Value is | |
3802 | always 1. */ | |
3803 | ||
3804 | static int | |
3805 | next_element_from_stretch (it) | |
3806 | struct it *it; | |
3807 | { | |
3808 | it->what = IT_STRETCH; | |
3809 | return 1; | |
3810 | } | |
3811 | ||
3812 | ||
3813 | /* Load IT with the next display element from current_buffer. Value | |
3814 | is zero if end of buffer reached. IT->stop_charpos is the next | |
3815 | position at which to stop and check for text properties or buffer | |
3816 | end. */ | |
3817 | ||
3818 | static int | |
3819 | next_element_from_buffer (it) | |
3820 | struct it *it; | |
3821 | { | |
3822 | int success_p = 1; | |
3823 | ||
3824 | /* Check this assumption, otherwise, we would never enter the | |
3825 | if-statement, below. */ | |
3826 | xassert (IT_CHARPOS (*it) >= BEGV | |
3827 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
3828 | ||
3829 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
3830 | { | |
3831 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3832 | { | |
3833 | int overlay_strings_follow_p; | |
3834 | ||
3835 | /* End of the game, except when overlay strings follow that | |
3836 | haven't been returned yet. */ | |
3837 | if (it->overlay_strings_at_end_processed_p) | |
3838 | overlay_strings_follow_p = 0; | |
3839 | else | |
3840 | { | |
3841 | it->overlay_strings_at_end_processed_p = 1; | |
3842 | overlay_strings_follow_p | |
3843 | = get_overlay_strings (it); | |
3844 | } | |
3845 | ||
3846 | if (overlay_strings_follow_p) | |
3847 | success_p = get_next_display_element (it); | |
3848 | else | |
3849 | { | |
3850 | it->what = IT_EOB; | |
3851 | it->position = it->current.pos; | |
3852 | success_p = 0; | |
3853 | } | |
3854 | } | |
3855 | else | |
3856 | { | |
3857 | handle_stop (it); | |
3858 | return get_next_display_element (it); | |
3859 | } | |
3860 | } | |
3861 | else | |
3862 | { | |
3863 | /* No face changes, overlays etc. in sight, so just return a | |
3864 | character from current_buffer. */ | |
3865 | unsigned char *p; | |
3866 | ||
3867 | /* Maybe run the redisplay end trigger hook. Performance note: | |
3868 | This doesn't seem to cost measurable time. */ | |
3869 | if (it->redisplay_end_trigger_charpos | |
3870 | && it->glyph_row | |
3871 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
3872 | run_redisplay_end_trigger_hook (it); | |
3873 | ||
3874 | /* Get the next character, maybe multibyte. */ | |
3875 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
3876 | if (it->multibyte_p) | |
3877 | { | |
3878 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
3879 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 3880 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
3881 | } |
3882 | else | |
3883 | it->c = *p, it->len = 1; | |
3884 | ||
3885 | /* Record what we have and where it came from. */ | |
3886 | it->what = IT_CHARACTER;; | |
3887 | it->object = it->w->buffer; | |
3888 | it->position = it->current.pos; | |
3889 | ||
3890 | /* Normally we return the character found above, except when we | |
3891 | really want to return an ellipsis for selective display. */ | |
3892 | if (it->selective) | |
3893 | { | |
3894 | if (it->c == '\n') | |
3895 | { | |
3896 | /* A value of selective > 0 means hide lines indented more | |
3897 | than that number of columns. */ | |
3898 | if (it->selective > 0 | |
3899 | && IT_CHARPOS (*it) + 1 < ZV | |
3900 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
3901 | IT_BYTEPOS (*it) + 1, | |
3902 | it->selective)) | |
312246d1 GM |
3903 | { |
3904 | next_element_from_ellipsis (it); | |
3905 | it->dpvec_char_len = -1; | |
3906 | } | |
5f5c8ee5 GM |
3907 | } |
3908 | else if (it->c == '\r' && it->selective == -1) | |
3909 | { | |
3910 | /* A value of selective == -1 means that everything from the | |
3911 | CR to the end of the line is invisible, with maybe an | |
3912 | ellipsis displayed for it. */ | |
3913 | next_element_from_ellipsis (it); | |
312246d1 | 3914 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
3915 | } |
3916 | } | |
3917 | } | |
3918 | ||
3919 | /* Value is zero if end of buffer reached. */ | |
3920 | xassert (!success_p || it->len > 0); | |
3921 | return success_p; | |
3922 | } | |
3923 | ||
3924 | ||
3925 | /* Run the redisplay end trigger hook for IT. */ | |
3926 | ||
3927 | static void | |
3928 | run_redisplay_end_trigger_hook (it) | |
3929 | struct it *it; | |
3930 | { | |
3931 | Lisp_Object args[3]; | |
3932 | ||
3933 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
3934 | displaying something, or otherwise we should not run the hook. */ | |
3935 | xassert (it->glyph_row); | |
3936 | ||
3937 | /* Set up hook arguments. */ | |
3938 | args[0] = Qredisplay_end_trigger_functions; | |
3939 | args[1] = it->window; | |
3940 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
3941 | it->redisplay_end_trigger_charpos = 0; | |
3942 | ||
3943 | /* Since we are *trying* to run these functions, don't try to run | |
3944 | them again, even if they get an error. */ | |
3945 | it->w->redisplay_end_trigger = Qnil; | |
3946 | Frun_hook_with_args (3, args); | |
3947 | ||
3948 | /* Notice if it changed the face of the character we are on. */ | |
3949 | handle_face_prop (it); | |
3950 | } | |
3951 | ||
3952 | ||
3953 | \f | |
3954 | /*********************************************************************** | |
3955 | Moving an iterator without producing glyphs | |
3956 | ***********************************************************************/ | |
3957 | ||
3958 | /* Move iterator IT to a specified buffer or X position within one | |
3959 | line on the display without producing glyphs. | |
3960 | ||
3961 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
3962 | whichever is reached first. | |
3963 | ||
3964 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
3965 | ||
3966 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
3967 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
3968 | TO_X includes the amount by which a window is horizontally | |
3969 | scrolled. | |
3970 | ||
3971 | Value is | |
3972 | ||
3973 | MOVE_POS_MATCH_OR_ZV | |
3974 | - when TO_POS or ZV was reached. | |
3975 | ||
3976 | MOVE_X_REACHED | |
3977 | -when TO_X was reached before TO_POS or ZV were reached. | |
3978 | ||
3979 | MOVE_LINE_CONTINUED | |
3980 | - when we reached the end of the display area and the line must | |
3981 | be continued. | |
3982 | ||
3983 | MOVE_LINE_TRUNCATED | |
3984 | - when we reached the end of the display area and the line is | |
3985 | truncated. | |
3986 | ||
3987 | MOVE_NEWLINE_OR_CR | |
3988 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
3989 | display is on. */ | |
3990 | ||
3991 | enum move_it_result | |
3992 | move_it_in_display_line_to (it, to_charpos, to_x, op) | |
3993 | struct it *it; | |
3994 | int to_charpos, to_x, op; | |
3995 | { | |
3996 | enum move_it_result result = MOVE_UNDEFINED; | |
3997 | struct glyph_row *saved_glyph_row; | |
3998 | ||
3999 | /* Don't produce glyphs in produce_glyphs. */ | |
4000 | saved_glyph_row = it->glyph_row; | |
4001 | it->glyph_row = NULL; | |
4002 | ||
4003 | #if NO_PROMPT_IN_BUFFER | |
4004 | /* Take a mini-buffer prompt into account. */ | |
4005 | if (MINI_WINDOW_P (it->w) | |
4006 | && IT_CHARPOS (*it) == BEGV) | |
4007 | { | |
4008 | it->current_x = minibuf_prompt_pixel_width; | |
4009 | it->hpos = minibuf_prompt_width; | |
4010 | } | |
4011 | #endif | |
4012 | ||
4013 | while (1) | |
4014 | { | |
4015 | int x, i; | |
4016 | ||
4017 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4018 | if (!get_next_display_element (it) | |
4019 | || ((op & MOVE_TO_POS) != 0 | |
4020 | && BUFFERP (it->object) | |
4021 | && IT_CHARPOS (*it) >= to_charpos)) | |
4022 | { | |
4023 | result = MOVE_POS_MATCH_OR_ZV; | |
4024 | break; | |
4025 | } | |
4026 | ||
4027 | /* The call to produce_glyphs will get the metrics of the | |
4028 | display element IT is loaded with. We record in x the | |
4029 | x-position before this display element in case it does not | |
4030 | fit on the line. */ | |
4031 | x = it->current_x; | |
4032 | PRODUCE_GLYPHS (it); | |
4033 | ||
4034 | if (it->area != TEXT_AREA) | |
4035 | { | |
4036 | set_iterator_to_next (it); | |
4037 | continue; | |
4038 | } | |
4039 | ||
4040 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4041 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4042 | character on a terminal frame, or (iii) a line end. For the | |
4043 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4044 | (on X frames, there is only one glyph produced for a | |
4045 | composite character. | |
4046 | ||
4047 | The behavior implemented below means, for continuation lines, | |
4048 | that as many spaces of a TAB as fit on the current line are | |
4049 | displayed there. For terminal frames, as many glyphs of a | |
4050 | multi-glyph character are displayed in the current line, too. | |
4051 | This is what the old redisplay code did, and we keep it that | |
4052 | way. Under X, the whole shape of a complex character must | |
4053 | fit on the line or it will be completely displayed in the | |
4054 | next line. | |
4055 | ||
4056 | Note that both for tabs and padding glyphs, all glyphs have | |
4057 | the same width. */ | |
4058 | if (it->nglyphs) | |
4059 | { | |
4060 | /* More than one glyph or glyph doesn't fit on line. All | |
4061 | glyphs have the same width. */ | |
4062 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4063 | int new_x; | |
4064 | ||
4065 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4066 | { | |
4067 | new_x = x + single_glyph_width; | |
4068 | ||
4069 | /* We want to leave anything reaching TO_X to the caller. */ | |
4070 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4071 | { | |
4072 | it->current_x = x; | |
4073 | result = MOVE_X_REACHED; | |
4074 | break; | |
4075 | } | |
4076 | else if (/* Lines are continued. */ | |
4077 | !it->truncate_lines_p | |
4078 | && (/* And glyph doesn't fit on the line. */ | |
4079 | new_x > it->last_visible_x | |
4080 | /* Or it fits exactly and we're on a window | |
4081 | system frame. */ | |
4082 | || (new_x == it->last_visible_x | |
4083 | && FRAME_WINDOW_P (it->f)))) | |
4084 | { | |
4085 | if (/* IT->hpos == 0 means the very first glyph | |
4086 | doesn't fit on the line, e.g. a wide image. */ | |
4087 | it->hpos == 0 | |
4088 | || (new_x == it->last_visible_x | |
4089 | && FRAME_WINDOW_P (it->f))) | |
4090 | { | |
4091 | ++it->hpos; | |
4092 | it->current_x = new_x; | |
4093 | if (i == it->nglyphs - 1) | |
4094 | set_iterator_to_next (it); | |
4095 | } | |
4096 | else | |
4097 | it->current_x = x; | |
4098 | ||
4099 | result = MOVE_LINE_CONTINUED; | |
4100 | break; | |
4101 | } | |
4102 | else if (new_x > it->first_visible_x) | |
4103 | { | |
4104 | /* Glyph is visible. Increment number of glyphs that | |
4105 | would be displayed. */ | |
4106 | ++it->hpos; | |
4107 | } | |
4108 | else | |
4109 | { | |
4110 | /* Glyph is completely off the left margin of the display | |
4111 | area. Nothing to do. */ | |
4112 | } | |
4113 | } | |
4114 | ||
4115 | if (result != MOVE_UNDEFINED) | |
4116 | break; | |
4117 | } | |
4118 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4119 | { | |
4120 | /* Stop when TO_X specified and reached. This check is | |
4121 | necessary here because of lines consisting of a line end, | |
4122 | only. The line end will not produce any glyphs and we | |
4123 | would never get MOVE_X_REACHED. */ | |
4124 | xassert (it->nglyphs == 0); | |
4125 | result = MOVE_X_REACHED; | |
4126 | break; | |
4127 | } | |
4128 | ||
4129 | /* Is this a line end? If yes, we're done. */ | |
4130 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4131 | { | |
4132 | result = MOVE_NEWLINE_OR_CR; | |
4133 | break; | |
4134 | } | |
4135 | ||
4136 | /* The current display element has been consumed. Advance | |
4137 | to the next. */ | |
4138 | set_iterator_to_next (it); | |
4139 | ||
4140 | /* Stop if lines are truncated and IT's current x-position is | |
4141 | past the right edge of the window now. */ | |
4142 | if (it->truncate_lines_p | |
4143 | && it->current_x >= it->last_visible_x) | |
4144 | { | |
4145 | result = MOVE_LINE_TRUNCATED; | |
4146 | break; | |
4147 | } | |
4148 | } | |
4149 | ||
4150 | /* Restore the iterator settings altered at the beginning of this | |
4151 | function. */ | |
4152 | it->glyph_row = saved_glyph_row; | |
4153 | return result; | |
4154 | } | |
4155 | ||
4156 | ||
4157 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4158 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4159 | the description of enum move_operation_enum. | |
4160 | ||
4161 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4162 | screen line, this function will set IT to the next position > | |
4163 | TO_CHARPOS. */ | |
4164 | ||
4165 | void | |
4166 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4167 | struct it *it; | |
4168 | int to_charpos, to_x, to_y, to_vpos; | |
4169 | int op; | |
4170 | { | |
4171 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4172 | int line_height; | |
4173 | ||
4174 | xassert (XBUFFER (it->w->buffer) == current_buffer); | |
4175 | ||
4176 | while (1) | |
4177 | { | |
4178 | if (op & MOVE_TO_VPOS) | |
4179 | { | |
4180 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4181 | start of the line TO_VPOS. */ | |
4182 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4183 | { | |
4184 | if (it->vpos == to_vpos) | |
4185 | break; | |
4186 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
4187 | } | |
4188 | else | |
4189 | { | |
4190 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4191 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
4192 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); | |
4193 | ||
4194 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
4195 | break; | |
4196 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) | |
4197 | { | |
4198 | /* We have reached TO_X but not in the line we want. */ | |
4199 | skip = move_it_in_display_line_to (it, to_charpos, | |
4200 | -1, MOVE_TO_POS); | |
4201 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4202 | break; | |
4203 | } | |
4204 | } | |
4205 | } | |
4206 | else if (op & MOVE_TO_Y) | |
4207 | { | |
4208 | struct it it_backup; | |
4209 | int done_p; | |
4210 | ||
4211 | /* TO_Y specified means stop at TO_X in the line containing | |
4212 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4213 | problem is that we can't really tell whether the line | |
4214 | contains TO_Y before we have completely scanned it, and | |
4215 | this may skip past TO_X. What we do is to first scan to | |
4216 | TO_X. | |
4217 | ||
4218 | If TO_X is not specified, use a TO_X of zero. The reason | |
4219 | is to make the outcome of this function more predictable. | |
4220 | If we didn't use TO_X == 0, we would stop at the end of | |
4221 | the line which is probably not what a caller would expect | |
4222 | to happen. */ | |
4223 | skip = move_it_in_display_line_to (it, to_charpos, | |
4224 | ((op & MOVE_TO_X) | |
4225 | ? to_x : 0), | |
4226 | (MOVE_TO_X | |
4227 | | (op & MOVE_TO_POS))); | |
4228 | ||
4229 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4230 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4231 | break; | |
4232 | ||
4233 | /* If TO_X was reached, we would like to know whether TO_Y | |
4234 | is in the line. This can only be said if we know the | |
4235 | total line height which requires us to scan the rest of | |
4236 | the line. */ | |
4237 | done_p = 0; | |
4238 | if (skip == MOVE_X_REACHED) | |
4239 | { | |
4240 | it_backup = *it; | |
4241 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, | |
4242 | op & MOVE_TO_POS); | |
4243 | } | |
4244 | ||
4245 | /* Now, decide whether TO_Y is in this line. */ | |
4246 | line_height = it->max_ascent + it->max_descent; | |
4247 | ||
4248 | if (to_y >= it->current_y | |
4249 | && to_y < it->current_y + line_height) | |
4250 | { | |
4251 | if (skip == MOVE_X_REACHED) | |
4252 | /* If TO_Y is in this line and TO_X was reached above, | |
4253 | we scanned too far. We have to restore IT's settings | |
4254 | to the ones before skipping. */ | |
4255 | *it = it_backup; | |
4256 | done_p = 1; | |
4257 | } | |
4258 | else if (skip == MOVE_X_REACHED) | |
4259 | { | |
4260 | skip = skip2; | |
4261 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4262 | done_p = 1; | |
4263 | } | |
4264 | ||
4265 | if (done_p) | |
4266 | break; | |
4267 | } | |
4268 | else | |
4269 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4270 | ||
4271 | switch (skip) | |
4272 | { | |
4273 | case MOVE_POS_MATCH_OR_ZV: | |
4274 | return; | |
4275 | ||
4276 | case MOVE_NEWLINE_OR_CR: | |
4277 | set_iterator_to_next (it); | |
4278 | it->continuation_lines_width = 0; | |
4279 | break; | |
4280 | ||
4281 | case MOVE_LINE_TRUNCATED: | |
4282 | it->continuation_lines_width = 0; | |
312246d1 | 4283 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4284 | if ((op & MOVE_TO_POS) != 0 |
4285 | && IT_CHARPOS (*it) > to_charpos) | |
4286 | goto out; | |
4287 | break; | |
4288 | ||
4289 | case MOVE_LINE_CONTINUED: | |
4290 | it->continuation_lines_width += it->current_x; | |
4291 | break; | |
4292 | ||
4293 | default: | |
4294 | abort (); | |
4295 | } | |
4296 | ||
4297 | /* Reset/increment for the next run. */ | |
4298 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4299 | it->current_x = it->hpos = 0; | |
4300 | it->current_y += it->max_ascent + it->max_descent; | |
4301 | ++it->vpos; | |
4302 | last_height = it->max_ascent + it->max_descent; | |
4303 | last_max_ascent = it->max_ascent; | |
4304 | it->max_ascent = it->max_descent = 0; | |
4305 | } | |
4306 | out:; | |
4307 | } | |
4308 | ||
4309 | ||
4310 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4311 | ||
4312 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4313 | means move IT backward to the preceding line start or BEGV. This | |
4314 | function may move over more than DY pixels if IT->current_y - DY | |
4315 | ends up in the middle of a line; in this case IT->current_y will be | |
4316 | set to the top of the line moved to. */ | |
4317 | ||
4318 | void | |
4319 | move_it_vertically_backward (it, dy) | |
4320 | struct it *it; | |
4321 | int dy; | |
4322 | { | |
4323 | int nlines, h, line_height; | |
4324 | struct it it2; | |
4325 | int start_pos = IT_CHARPOS (*it); | |
4326 | ||
4327 | xassert (dy >= 0); | |
4328 | ||
4329 | /* Estimate how many newlines we must move back. */ | |
4330 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4331 | ||
4332 | /* Set the iterator's position that many lines back. */ | |
4333 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4334 | back_to_previous_visible_line_start (it); | |
4335 | ||
4336 | /* Reseat the iterator here. When moving backward, we don't want | |
4337 | reseat to skip forward over invisible text, set up the iterator | |
4338 | to deliver from overlay strings at the new position etc. So, | |
4339 | use reseat_1 here. */ | |
4340 | reseat_1 (it, it->current.pos, 1); | |
4341 | ||
4342 | /* We are now surely at a line start. */ | |
4343 | it->current_x = it->hpos = 0; | |
4344 | ||
4345 | /* Move forward and see what y-distance we moved. First move to the | |
4346 | start of the next line so that we get its height. We need this | |
4347 | height to be able to tell whether we reached the specified | |
4348 | y-distance. */ | |
4349 | it2 = *it; | |
4350 | it2.max_ascent = it2.max_descent = 0; | |
4351 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4352 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4353 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4354 | line_height = it2.max_ascent + it2.max_descent; | |
4355 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); | |
4356 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4357 | h = it2.current_y - it->current_y; | |
4358 | nlines = it2.vpos - it->vpos; | |
4359 | ||
4360 | /* Correct IT's y and vpos position. */ | |
4361 | it->vpos -= nlines; | |
4362 | it->current_y -= h; | |
4363 | ||
4364 | if (dy == 0) | |
4365 | { | |
4366 | /* DY == 0 means move to the start of the screen line. The | |
4367 | value of nlines is > 0 if continuation lines were involved. */ | |
4368 | if (nlines > 0) | |
4369 | move_it_by_lines (it, nlines, 1); | |
4370 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4371 | } | |
4372 | else if (nlines) | |
4373 | { | |
4374 | /* The y-position we try to reach. Note that h has been | |
4375 | subtracted in front of the if-statement. */ | |
4376 | int target_y = it->current_y + h - dy; | |
4377 | ||
4378 | /* If we did not reach target_y, try to move further backward if | |
4379 | we can. If we moved too far backward, try to move forward. */ | |
4380 | if (target_y < it->current_y | |
4381 | && IT_CHARPOS (*it) > BEGV) | |
4382 | { | |
4383 | move_it_vertically (it, target_y - it->current_y); | |
4384 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4385 | } | |
4386 | else if (target_y >= it->current_y + line_height | |
4387 | && IT_CHARPOS (*it) < ZV) | |
4388 | { | |
4389 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4390 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4391 | } | |
4392 | } | |
4393 | } | |
4394 | ||
4395 | ||
4396 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4397 | move backwards. DY = 0 means move to start of screen line. At the | |
4398 | end, IT will be on the start of a screen line. */ | |
4399 | ||
4400 | void | |
4401 | move_it_vertically (it, dy) | |
4402 | struct it *it; | |
4403 | int dy; | |
4404 | { | |
4405 | if (dy <= 0) | |
4406 | move_it_vertically_backward (it, -dy); | |
4407 | else if (dy > 0) | |
4408 | { | |
4409 | move_it_to (it, ZV, -1, it->current_y + dy, -1, | |
4410 | MOVE_TO_POS | MOVE_TO_Y); | |
4411 | ||
4412 | /* If buffer ends in ZV without a newline, move to the start of | |
4413 | the line to satisfy the post-condition. */ | |
4414 | if (IT_CHARPOS (*it) == ZV | |
4415 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4416 | move_it_by_lines (it, 0, 0); | |
4417 | } | |
4418 | } | |
4419 | ||
4420 | ||
4421 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4422 | and END_CHARPOS is invisible. IT->window is the window for text | |
4423 | property lookup. */ | |
4424 | ||
4425 | static int | |
4426 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4427 | struct it *it; | |
4428 | int start_charpos, end_charpos; | |
4429 | { | |
4430 | #ifdef USE_TEXT_PROPERTIES | |
4431 | Lisp_Object prop, limit; | |
4432 | int invisible_found_p; | |
4433 | ||
4434 | xassert (it != NULL && start_charpos <= end_charpos); | |
4435 | ||
4436 | /* Is text at START invisible? */ | |
4437 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4438 | it->window); | |
4439 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4440 | invisible_found_p = 1; | |
4441 | else | |
4442 | { | |
4443 | limit = Fnext_single_property_change (make_number (start_charpos), | |
4444 | Qinvisible, | |
4445 | Fcurrent_buffer (), | |
4446 | make_number (end_charpos)); | |
4447 | invisible_found_p = XFASTINT (limit) < end_charpos; | |
4448 | } | |
4449 | ||
4450 | return invisible_found_p; | |
4451 | ||
4452 | #else /* not USE_TEXT_PROPERTIES */ | |
4453 | return 0; | |
4454 | #endif /* not USE_TEXT_PROPERTIES */ | |
4455 | } | |
4456 | ||
4457 | ||
4458 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4459 | negative means move up. DVPOS == 0 means move to the start of the | |
4460 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4461 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4462 | ||
4463 | Further optimization ideas: If we would know that IT->f doesn't use | |
4464 | a face with proportional font, we could be faster for | |
4465 | truncate-lines nil. */ | |
4466 | ||
4467 | void | |
4468 | move_it_by_lines (it, dvpos, need_y_p) | |
4469 | struct it *it; | |
4470 | int dvpos, need_y_p; | |
4471 | { | |
4472 | struct position pos; | |
4473 | ||
4474 | if (!FRAME_WINDOW_P (it->f)) | |
4475 | { | |
4476 | struct text_pos textpos; | |
4477 | ||
4478 | /* We can use vmotion on frames without proportional fonts. */ | |
4479 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4480 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4481 | reseat (it, textpos, 1); | |
4482 | it->vpos += pos.vpos; | |
4483 | it->current_y += pos.vpos; | |
4484 | } | |
4485 | else if (dvpos == 0) | |
4486 | { | |
4487 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4488 | move_it_vertically_backward (it, 0); | |
4489 | xassert (it->current_x == 0 && it->hpos == 0); | |
4490 | } | |
4491 | else if (dvpos > 0) | |
4492 | { | |
4493 | /* If there are no continuation lines, and if there is no | |
4494 | selective display, try the simple method of moving forward | |
4495 | DVPOS newlines, then see where we are. */ | |
4496 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4497 | { | |
4498 | int shortage = 0, charpos; | |
4499 | ||
4500 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4501 | charpos = IT_CHARPOS (*it) + 1; | |
4502 | else | |
4503 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4504 | &shortage, 0); | |
4505 | ||
4506 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4507 | { | |
4508 | struct text_pos pos; | |
4509 | CHARPOS (pos) = charpos; | |
4510 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4511 | reseat (it, pos, 1); | |
4512 | it->vpos += dvpos - shortage; | |
4513 | it->hpos = it->current_x = 0; | |
4514 | return; | |
4515 | } | |
4516 | } | |
4517 | ||
4518 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4519 | } | |
4520 | else | |
4521 | { | |
4522 | struct it it2; | |
4523 | int start_charpos, i; | |
4524 | ||
4525 | /* If there are no continuation lines, and if there is no | |
4526 | selective display, try the simple method of moving backward | |
4527 | -DVPOS newlines. */ | |
4528 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4529 | { | |
4530 | int shortage; | |
4531 | int charpos = IT_CHARPOS (*it); | |
4532 | int bytepos = IT_BYTEPOS (*it); | |
4533 | ||
4534 | /* If in the middle of a line, go to its start. */ | |
4535 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4536 | { | |
4537 | charpos = find_next_newline_no_quit (charpos, -1); | |
4538 | bytepos = CHAR_TO_BYTE (charpos); | |
4539 | } | |
4540 | ||
4541 | if (charpos == BEGV) | |
4542 | { | |
4543 | struct text_pos pos; | |
4544 | CHARPOS (pos) = charpos; | |
4545 | BYTEPOS (pos) = bytepos; | |
4546 | reseat (it, pos, 1); | |
4547 | it->hpos = it->current_x = 0; | |
4548 | return; | |
4549 | } | |
4550 | else | |
4551 | { | |
4552 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4553 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4554 | { | |
4555 | struct text_pos pos; | |
4556 | CHARPOS (pos) = charpos; | |
4557 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4558 | reseat (it, pos, 1); | |
4559 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4560 | it->hpos = it->current_x = 0; | |
4561 | return; | |
4562 | } | |
4563 | } | |
4564 | } | |
4565 | ||
4566 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4567 | start_charpos = IT_CHARPOS (*it); | |
4568 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4569 | back_to_previous_visible_line_start (it); | |
4570 | reseat (it, it->current.pos, 1); | |
4571 | it->current_x = it->hpos = 0; | |
4572 | ||
4573 | /* Above call may have moved too far if continuation lines | |
4574 | are involved. Scan forward and see if it did. */ | |
4575 | it2 = *it; | |
4576 | it2.vpos = it2.current_y = 0; | |
4577 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4578 | it->vpos -= it2.vpos; | |
4579 | it->current_y -= it2.current_y; | |
4580 | it->current_x = it->hpos = 0; | |
4581 | ||
4582 | /* If we moved too far, move IT some lines forward. */ | |
4583 | if (it2.vpos > -dvpos) | |
4584 | { | |
4585 | int delta = it2.vpos + dvpos; | |
4586 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4587 | } | |
4588 | } | |
4589 | } | |
4590 | ||
4591 | ||
4592 | \f | |
4593 | /*********************************************************************** | |
4594 | Messages | |
4595 | ***********************************************************************/ | |
4596 | ||
4597 | ||
4598 | /* Output a newline in the *Messages* buffer if "needs" one. */ | |
4599 | ||
4600 | void | |
4601 | message_log_maybe_newline () | |
4602 | { | |
4603 | if (message_log_need_newline) | |
4604 | message_dolog ("", 0, 1, 0); | |
4605 | } | |
4606 | ||
4607 | ||
4608 | /* Add a string M of length LEN to the message log, optionally | |
4609 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4610 | nonzero, means interpret the contents of M as multibyte. This | |
4611 | function calls low-level routines in order to bypass text property | |
4612 | hooks, etc. which might not be safe to run. */ | |
4613 | ||
4614 | void | |
4615 | message_dolog (m, len, nlflag, multibyte) | |
4616 | char *m; | |
4617 | int len, nlflag, multibyte; | |
4618 | { | |
4619 | if (!NILP (Vmessage_log_max)) | |
4620 | { | |
4621 | struct buffer *oldbuf; | |
4622 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4623 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4624 | int point_at_end = 0; | |
4625 | int zv_at_end = 0; | |
4626 | Lisp_Object old_deactivate_mark, tem; | |
4627 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4628 | ||
4629 | old_deactivate_mark = Vdeactivate_mark; | |
4630 | oldbuf = current_buffer; | |
4631 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); | |
4632 | current_buffer->undo_list = Qt; | |
4633 | ||
4634 | oldpoint = Fpoint_marker (); | |
4635 | oldbegv = Fpoint_min_marker (); | |
4636 | oldzv = Fpoint_max_marker (); | |
4637 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
4638 | ||
4639 | if (PT == Z) | |
4640 | point_at_end = 1; | |
4641 | if (ZV == Z) | |
4642 | zv_at_end = 1; | |
4643 | ||
4644 | BEGV = BEG; | |
4645 | BEGV_BYTE = BEG_BYTE; | |
4646 | ZV = Z; | |
4647 | ZV_BYTE = Z_BYTE; | |
4648 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4649 | ||
4650 | /* Insert the string--maybe converting multibyte to single byte | |
4651 | or vice versa, so that all the text fits the buffer. */ | |
4652 | if (multibyte | |
4653 | && NILP (current_buffer->enable_multibyte_characters)) | |
4654 | { | |
4655 | int i, c, nbytes; | |
4656 | unsigned char work[1]; | |
4657 | ||
4658 | /* Convert a multibyte string to single-byte | |
4659 | for the *Message* buffer. */ | |
4660 | for (i = 0; i < len; i += nbytes) | |
4661 | { | |
4fdb80f2 | 4662 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
4663 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
4664 | ? c | |
4665 | : multibyte_char_to_unibyte (c, Qnil)); | |
4666 | insert_1_both (work, 1, 1, 1, 0, 0); | |
4667 | } | |
4668 | } | |
4669 | else if (! multibyte | |
4670 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
4671 | { | |
4672 | int i, c, nbytes; | |
4673 | unsigned char *msg = (unsigned char *) m; | |
4674 | unsigned char *str, work[4]; | |
4675 | /* Convert a single-byte string to multibyte | |
4676 | for the *Message* buffer. */ | |
4677 | for (i = 0; i < len; i++) | |
4678 | { | |
4679 | c = unibyte_char_to_multibyte (msg[i]); | |
4680 | nbytes = CHAR_STRING (c, work, str); | |
4681 | insert_1_both (work, 1, nbytes, 1, 0, 0); | |
4682 | } | |
4683 | } | |
4684 | else if (len) | |
4685 | insert_1 (m, len, 1, 0, 0); | |
4686 | ||
4687 | if (nlflag) | |
4688 | { | |
4689 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
4690 | insert_1 ("\n", 1, 1, 0, 0); | |
4691 | ||
4692 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
4693 | this_bol = PT; | |
4694 | this_bol_byte = PT_BYTE; | |
4695 | ||
4696 | if (this_bol > BEG) | |
4697 | { | |
4698 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
4699 | prev_bol = PT; | |
4700 | prev_bol_byte = PT_BYTE; | |
4701 | ||
4702 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
4703 | this_bol, this_bol_byte); | |
4704 | if (dup) | |
4705 | { | |
4706 | del_range_both (prev_bol, prev_bol_byte, | |
4707 | this_bol, this_bol_byte, 0); | |
4708 | if (dup > 1) | |
4709 | { | |
4710 | char dupstr[40]; | |
4711 | int duplen; | |
4712 | ||
4713 | /* If you change this format, don't forget to also | |
4714 | change message_log_check_duplicate. */ | |
4715 | sprintf (dupstr, " [%d times]", dup); | |
4716 | duplen = strlen (dupstr); | |
4717 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
4718 | insert_1 (dupstr, duplen, 1, 0, 1); | |
4719 | } | |
4720 | } | |
4721 | } | |
4722 | ||
4723 | if (NATNUMP (Vmessage_log_max)) | |
4724 | { | |
4725 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
4726 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
4727 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
4728 | } | |
4729 | } | |
4730 | BEGV = XMARKER (oldbegv)->charpos; | |
4731 | BEGV_BYTE = marker_byte_position (oldbegv); | |
4732 | ||
4733 | if (zv_at_end) | |
4734 | { | |
4735 | ZV = Z; | |
4736 | ZV_BYTE = Z_BYTE; | |
4737 | } | |
4738 | else | |
4739 | { | |
4740 | ZV = XMARKER (oldzv)->charpos; | |
4741 | ZV_BYTE = marker_byte_position (oldzv); | |
4742 | } | |
4743 | ||
4744 | if (point_at_end) | |
4745 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4746 | else | |
4747 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
4748 | Lisp code. */ | |
4749 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
4750 | XMARKER (oldpoint)->bytepos); | |
4751 | ||
4752 | UNGCPRO; | |
4753 | free_marker (oldpoint); | |
4754 | free_marker (oldbegv); | |
4755 | free_marker (oldzv); | |
4756 | ||
4757 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
4758 | set_buffer_internal (oldbuf); | |
4759 | if (NILP (tem)) | |
4760 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
4761 | message_log_need_newline = !nlflag; | |
4762 | Vdeactivate_mark = old_deactivate_mark; | |
4763 | } | |
4764 | } | |
4765 | ||
4766 | ||
4767 | /* We are at the end of the buffer after just having inserted a newline. | |
4768 | (Note: We depend on the fact we won't be crossing the gap.) | |
4769 | Check to see if the most recent message looks a lot like the previous one. | |
4770 | Return 0 if different, 1 if the new one should just replace it, or a | |
4771 | value N > 1 if we should also append " [N times]". */ | |
4772 | ||
4773 | static int | |
4774 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
4775 | int prev_bol, this_bol; | |
4776 | int prev_bol_byte, this_bol_byte; | |
4777 | { | |
4778 | int i; | |
4779 | int len = Z_BYTE - 1 - this_bol_byte; | |
4780 | int seen_dots = 0; | |
4781 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
4782 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
4783 | ||
4784 | for (i = 0; i < len; i++) | |
4785 | { | |
4786 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
4787 | && p1[i] != '\n') | |
4788 | seen_dots = 1; | |
4789 | if (p1[i] != p2[i]) | |
4790 | return seen_dots; | |
4791 | } | |
4792 | p1 += len; | |
4793 | if (*p1 == '\n') | |
4794 | return 2; | |
4795 | if (*p1++ == ' ' && *p1++ == '[') | |
4796 | { | |
4797 | int n = 0; | |
4798 | while (*p1 >= '0' && *p1 <= '9') | |
4799 | n = n * 10 + *p1++ - '0'; | |
4800 | if (strncmp (p1, " times]\n", 8) == 0) | |
4801 | return n+1; | |
4802 | } | |
4803 | return 0; | |
4804 | } | |
4805 | ||
4806 | ||
4807 | /* Display an echo area message M with a specified length of LEN | |
4808 | chars. The string may include null characters. If M is 0, clear | |
4809 | out any existing message, and let the mini-buffer text show through. | |
4810 | ||
4811 | The buffer M must continue to exist until after the echo area gets | |
4812 | cleared or some other message gets displayed there. This means do | |
4813 | not pass text that is stored in a Lisp string; do not pass text in | |
4814 | a buffer that was alloca'd. */ | |
4815 | ||
4816 | void | |
4817 | message2 (m, len, multibyte) | |
4818 | char *m; | |
4819 | int len; | |
4820 | int multibyte; | |
4821 | { | |
4822 | /* First flush out any partial line written with print. */ | |
4823 | message_log_maybe_newline (); | |
4824 | if (m) | |
4825 | message_dolog (m, len, 1, multibyte); | |
4826 | message2_nolog (m, len, multibyte); | |
4827 | } | |
4828 | ||
4829 | ||
4830 | /* The non-logging counterpart of message2. */ | |
4831 | ||
4832 | void | |
4833 | message2_nolog (m, len, multibyte) | |
4834 | char *m; | |
4835 | int len; | |
4836 | { | |
4837 | message_enable_multibyte = multibyte; | |
4838 | ||
4839 | if (noninteractive) | |
4840 | { | |
4841 | if (noninteractive_need_newline) | |
4842 | putc ('\n', stderr); | |
4843 | noninteractive_need_newline = 0; | |
4844 | if (m) | |
4845 | fwrite (m, len, 1, stderr); | |
4846 | if (cursor_in_echo_area == 0) | |
4847 | fprintf (stderr, "\n"); | |
4848 | fflush (stderr); | |
4849 | } | |
4850 | /* A null message buffer means that the frame hasn't really been | |
4851 | initialized yet. Error messages get reported properly by | |
4852 | cmd_error, so this must be just an informative message; toss it. */ | |
4853 | else if (INTERACTIVE | |
4854 | && selected_frame->glyphs_initialized_p | |
4855 | && FRAME_MESSAGE_BUF (selected_frame)) | |
4856 | { | |
4857 | Lisp_Object mini_window; | |
4858 | struct frame *f; | |
4859 | ||
4860 | /* Get the frame containing the mini-buffer | |
4861 | that the selected frame is using. */ | |
4862 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
4863 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
4864 | ||
4865 | FRAME_SAMPLE_VISIBILITY (f); | |
4866 | if (FRAME_VISIBLE_P (selected_frame) | |
4867 | && ! FRAME_VISIBLE_P (f)) | |
4868 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4869 | ||
4870 | if (m) | |
4871 | { | |
4872 | echo_area_glyphs = m; | |
4873 | echo_area_glyphs_length = len; | |
4874 | echo_area_message = Qnil; | |
4875 | ||
4876 | if (minibuffer_auto_raise) | |
4877 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4878 | } | |
4879 | else | |
4880 | { | |
4881 | echo_area_glyphs = previous_echo_glyphs = NULL; | |
4882 | echo_area_message = previous_echo_area_message = Qnil; | |
4883 | } | |
4884 | ||
4885 | do_pending_window_change (); | |
4886 | echo_area_display (1); | |
4887 | do_pending_window_change (); | |
4888 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) | |
4889 | (*frame_up_to_date_hook) (f); | |
4890 | } | |
4891 | } | |
4892 | ||
4893 | ||
4894 | /* Display an echo area message M with a specified length of LEN | |
4895 | chars. The string may include null characters. If M is not a | |
4896 | string, clear out any existing message, and let the mini-buffer | |
4897 | text show through. */ | |
4898 | ||
4899 | void | |
4900 | message3 (m, len, multibyte) | |
4901 | Lisp_Object m; | |
4902 | int len; | |
4903 | int multibyte; | |
4904 | { | |
4905 | struct gcpro gcpro1; | |
4906 | ||
4907 | GCPRO1 (m); | |
4908 | ||
4909 | /* First flush out any partial line written with print. */ | |
4910 | message_log_maybe_newline (); | |
4911 | if (STRINGP (m)) | |
4912 | message_dolog (XSTRING (m)->data, len, 1, multibyte); | |
4913 | message3_nolog (m, len, multibyte); | |
4914 | ||
4915 | UNGCPRO; | |
4916 | } | |
4917 | ||
4918 | ||
4919 | /* The non-logging version of message3. */ | |
4920 | ||
4921 | void | |
4922 | message3_nolog (m, len, multibyte) | |
4923 | Lisp_Object m; | |
4924 | int len, multibyte; | |
4925 | { | |
4926 | message_enable_multibyte = multibyte; | |
4927 | ||
4928 | if (noninteractive) | |
4929 | { | |
4930 | if (noninteractive_need_newline) | |
4931 | putc ('\n', stderr); | |
4932 | noninteractive_need_newline = 0; | |
4933 | if (STRINGP (m)) | |
4934 | fwrite (XSTRING (m)->data, len, 1, stderr); | |
4935 | if (cursor_in_echo_area == 0) | |
4936 | fprintf (stderr, "\n"); | |
4937 | fflush (stderr); | |
4938 | } | |
4939 | /* A null message buffer means that the frame hasn't really been | |
4940 | initialized yet. Error messages get reported properly by | |
4941 | cmd_error, so this must be just an informative message; toss it. */ | |
4942 | else if (INTERACTIVE | |
4943 | && selected_frame->glyphs_initialized_p | |
4944 | && FRAME_MESSAGE_BUF (selected_frame)) | |
4945 | { | |
4946 | Lisp_Object mini_window; | |
4947 | struct frame *f; | |
4948 | ||
4949 | /* Get the frame containing the mini-buffer | |
4950 | that the selected frame is using. */ | |
4951 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
4952 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
4953 | ||
4954 | FRAME_SAMPLE_VISIBILITY (f); | |
4955 | if (FRAME_VISIBLE_P (selected_frame) | |
4956 | && ! FRAME_VISIBLE_P (f)) | |
4957 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4958 | ||
4959 | if (STRINGP (m)) | |
4960 | { | |
4961 | echo_area_glyphs = NULL; | |
4962 | echo_area_message = m; | |
4963 | echo_area_glyphs_length = len; | |
4964 | ||
4965 | if (minibuffer_auto_raise) | |
4966 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4967 | } | |
4968 | else | |
4969 | { | |
4970 | echo_area_glyphs = previous_echo_glyphs = NULL; | |
4971 | echo_area_message = previous_echo_area_message = Qnil; | |
4972 | } | |
4973 | ||
4974 | do_pending_window_change (); | |
4975 | echo_area_display (1); | |
4976 | do_pending_window_change (); | |
4977 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) | |
4978 | (*frame_up_to_date_hook) (f); | |
4979 | } | |
4980 | } | |
4981 | ||
4982 | ||
4983 | /* Display a null-terminated echo area message M. If M is 0, clear | |
4984 | out any existing message, and let the mini-buffer text show through. | |
4985 | ||
4986 | The buffer M must continue to exist until after the echo area gets | |
4987 | cleared or some other message gets displayed there. Do not pass | |
4988 | text that is stored in a Lisp string. Do not pass text in a buffer | |
4989 | that was alloca'd. */ | |
4990 | ||
4991 | void | |
4992 | message1 (m) | |
4993 | char *m; | |
4994 | { | |
4995 | message2 (m, (m ? strlen (m) : 0), 0); | |
4996 | } | |
4997 | ||
4998 | ||
4999 | /* The non-logging counterpart of message1. */ | |
5000 | ||
5001 | void | |
5002 | message1_nolog (m) | |
5003 | char *m; | |
5004 | { | |
5005 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5006 | } | |
5007 | ||
5008 | /* Display a message M which contains a single %s | |
5009 | which gets replaced with STRING. */ | |
5010 | ||
5011 | void | |
5012 | message_with_string (m, string, log) | |
5013 | char *m; | |
5014 | Lisp_Object string; | |
5015 | int log; | |
5016 | { | |
5017 | if (noninteractive) | |
5018 | { | |
5019 | if (m) | |
5020 | { | |
5021 | if (noninteractive_need_newline) | |
5022 | putc ('\n', stderr); | |
5023 | noninteractive_need_newline = 0; | |
5024 | fprintf (stderr, m, XSTRING (string)->data); | |
5025 | if (cursor_in_echo_area == 0) | |
5026 | fprintf (stderr, "\n"); | |
5027 | fflush (stderr); | |
5028 | } | |
5029 | } | |
5030 | else if (INTERACTIVE) | |
5031 | { | |
5032 | /* The frame whose minibuffer we're going to display the message on. | |
5033 | It may be larger than the selected frame, so we need | |
5034 | to use its buffer, not the selected frame's buffer. */ | |
5035 | Lisp_Object mini_window; | |
5036 | FRAME_PTR f; | |
5037 | ||
5038 | /* Get the frame containing the minibuffer | |
5039 | that the selected frame is using. */ | |
5040 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5041 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
5042 | ||
5043 | /* A null message buffer means that the frame hasn't really been | |
5044 | initialized yet. Error messages get reported properly by | |
5045 | cmd_error, so this must be just an informative message; toss it. */ | |
5046 | if (FRAME_MESSAGE_BUF (f)) | |
5047 | { | |
5048 | int len; | |
5049 | char *a[1]; | |
5050 | a[0] = (char *) XSTRING (string)->data; | |
5051 | ||
5052 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5053 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5054 | ||
5055 | if (log) | |
5056 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5057 | STRING_MULTIBYTE (string)); | |
5058 | else | |
5059 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5060 | STRING_MULTIBYTE (string)); | |
5061 | ||
5062 | /* Print should start at the beginning of the message | |
5063 | buffer next time. */ | |
5064 | message_buf_print = 0; | |
5065 | } | |
5066 | } | |
5067 | } | |
5068 | ||
5069 | ||
5070 | /* Truncate what will be displayed in the echo area | |
5071 | the next time we display it--but don't redisplay it now. */ | |
5072 | ||
5073 | void | |
5074 | truncate_echo_area (len) | |
5075 | int len; | |
5076 | { | |
5077 | /* A null message buffer means that the frame hasn't really been | |
5078 | initialized yet. Error messages get reported properly by | |
5079 | cmd_error, so this must be just an informative message; toss it. */ | |
5080 | if (!noninteractive && INTERACTIVE && FRAME_MESSAGE_BUF (selected_frame)) | |
5081 | echo_area_glyphs_length = len; | |
5082 | } | |
5083 | ||
5084 | ||
5085 | /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by | |
5086 | print; zero if being used by message. */ | |
5087 | ||
5088 | int message_buf_print; | |
5089 | ||
5090 | ||
5091 | /* Dump an informative message to the minibuf. If M is 0, clear out | |
5092 | any existing message, and let the mini-buffer text show through. */ | |
5093 | ||
5094 | /* VARARGS 1 */ | |
5095 | void | |
5096 | message (m, a1, a2, a3) | |
5097 | char *m; | |
5098 | EMACS_INT a1, a2, a3; | |
5099 | { | |
5100 | if (noninteractive) | |
5101 | { | |
5102 | if (m) | |
5103 | { | |
5104 | if (noninteractive_need_newline) | |
5105 | putc ('\n', stderr); | |
5106 | noninteractive_need_newline = 0; | |
5107 | fprintf (stderr, m, a1, a2, a3); | |
5108 | if (cursor_in_echo_area == 0) | |
5109 | fprintf (stderr, "\n"); | |
5110 | fflush (stderr); | |
5111 | } | |
5112 | } | |
5113 | else if (INTERACTIVE) | |
5114 | { | |
5115 | /* The frame whose mini-buffer we're going to display the message | |
5116 | on. It may be larger than the selected frame, so we need to | |
5117 | use its buffer, not the selected frame's buffer. */ | |
5118 | Lisp_Object mini_window; | |
5119 | struct frame *f; | |
5120 | ||
5121 | /* Get the frame containing the mini-buffer | |
5122 | that the selected frame is using. */ | |
5123 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5124 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
5125 | ||
5126 | /* A null message buffer means that the frame hasn't really been | |
5127 | initialized yet. Error messages get reported properly by | |
5128 | cmd_error, so this must be just an informative message; toss | |
5129 | it. */ | |
5130 | if (FRAME_MESSAGE_BUF (f)) | |
5131 | { | |
5132 | if (m) | |
5133 | { | |
5134 | int len; | |
5135 | #ifdef NO_ARG_ARRAY | |
5136 | char *a[3]; | |
5137 | a[0] = (char *) a1; | |
5138 | a[1] = (char *) a2; | |
5139 | a[2] = (char *) a3; | |
5140 | ||
5141 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5142 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5143 | #else | |
5144 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5145 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5146 | (char **) &a1); | |
5147 | #endif /* NO_ARG_ARRAY */ | |
5148 | ||
5149 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5150 | } | |
5151 | else | |
5152 | message1 (0); | |
5153 | ||
5154 | /* Print should start at the beginning of the message | |
5155 | buffer next time. */ | |
5156 | message_buf_print = 0; | |
5157 | } | |
5158 | } | |
5159 | } | |
5160 | ||
5161 | ||
5162 | /* The non-logging version of message. */ | |
5163 | ||
5164 | void | |
5165 | message_nolog (m, a1, a2, a3) | |
5166 | char *m; | |
5167 | EMACS_INT a1, a2, a3; | |
5168 | { | |
5169 | Lisp_Object old_log_max; | |
5170 | old_log_max = Vmessage_log_max; | |
5171 | Vmessage_log_max = Qnil; | |
5172 | message (m, a1, a2, a3); | |
5173 | Vmessage_log_max = old_log_max; | |
5174 | } | |
5175 | ||
5176 | ||
5177 | /* Display echo_area_message or echo_area_glyphs in the current | |
5178 | mini-buffer. */ | |
5179 | ||
5180 | void | |
5181 | update_echo_area () | |
5182 | { | |
5183 | if (STRINGP (echo_area_message)) | |
5184 | message3 (echo_area_message, echo_area_glyphs_length, | |
5185 | !NILP (current_buffer->enable_multibyte_characters)); | |
5186 | else | |
5187 | message2 (echo_area_glyphs, echo_area_glyphs_length, | |
5188 | !NILP (current_buffer->enable_multibyte_characters)); | |
5189 | } | |
5190 | ||
5191 | ||
5192 | /* Redisplay the echo area of selected_frame. If UPDATE_FRAME_P is | |
5193 | non-zero update selected_frame. */ | |
5194 | ||
5195 | static void | |
5196 | echo_area_display (update_frame_p) | |
5197 | int update_frame_p; | |
5198 | { | |
5199 | Lisp_Object mini_window; | |
5200 | struct window *w; | |
5201 | struct frame *f; | |
5202 | ||
5203 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5204 | w = XWINDOW (mini_window); | |
5205 | f = XFRAME (WINDOW_FRAME (w)); | |
5206 | ||
5207 | /* Don't display if frame is invisible or not yet initialized. */ | |
5208 | if (!FRAME_VISIBLE_P (f) | |
5209 | || !f->glyphs_initialized_p) | |
5210 | return; | |
5211 | ||
5212 | /* When Emacs starts, selected_frame may be a visible terminal | |
5213 | frame, even if we run under a window system. If we let this | |
5214 | through, a message would be displayed on the terminal. */ | |
5215 | #ifdef HAVE_WINDOW_SYSTEM | |
5216 | if (!inhibit_window_system && !FRAME_WINDOW_P (selected_frame)) | |
5217 | return; | |
5218 | #endif /* HAVE_WINDOW_SYSTEM */ | |
5219 | ||
5220 | /* Redraw garbaged frames. */ | |
5221 | if (frame_garbaged) | |
5222 | { | |
5223 | /* Old redisplay called redraw_garbaged_frames here which in | |
5224 | turn called redraw_frame which in turn called clear_frame. | |
5225 | The call to clear_frame is a source of flickering. After | |
5226 | checking the places where SET_FRAME_GARBAGED is called, I | |
5227 | believe a clear_frame is not necessary. It should suffice in | |
5228 | the new redisplay to invalidate all current matrices, and | |
5229 | ensure a complete redisplay of all windows. */ | |
5230 | Lisp_Object tail, frame; | |
5231 | ||
5232 | FOR_EACH_FRAME (tail, frame) | |
5233 | { | |
5234 | struct frame *f = XFRAME (frame); | |
5235 | ||
5236 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
5237 | { | |
5238 | clear_current_matrices (f); | |
5239 | f->garbaged = 0; | |
5240 | } | |
5241 | } | |
5242 | ||
5243 | frame_garbaged = 0; | |
5244 | ++windows_or_buffers_changed; | |
5245 | } | |
5246 | ||
5247 | if (echo_area_glyphs | |
5248 | || STRINGP (echo_area_message) | |
5249 | || minibuf_level == 0) | |
5250 | { | |
5251 | struct it it; | |
5252 | ||
5253 | echo_area_window = mini_window; | |
5254 | clear_glyph_matrix (w->desired_matrix); | |
5255 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, DEFAULT_FACE_ID); | |
5256 | ||
5257 | if (STRINGP (echo_area_message) | |
5258 | && echo_area_glyphs_length) | |
5259 | { | |
5260 | prepare_desired_row (it.glyph_row); | |
5261 | display_string (NULL, echo_area_message, Qnil, 0, 0, | |
5262 | &it, -1, echo_area_glyphs_length, 0, | |
5263 | message_enable_multibyte); | |
5264 | it.glyph_row->truncated_on_right_p = 0; | |
5265 | compute_line_metrics (&it); | |
5266 | } | |
5267 | else if (echo_area_glyphs | |
5268 | && echo_area_glyphs_length) | |
5269 | { | |
5270 | prepare_desired_row (it.glyph_row); | |
5271 | display_string (echo_area_glyphs, Qnil, Qnil, 0, 0, &it, | |
5272 | -1, echo_area_glyphs_length, 0, | |
5273 | message_enable_multibyte); | |
5274 | it.glyph_row->truncated_on_right_p = 0; | |
5275 | compute_line_metrics (&it); | |
5276 | } | |
5277 | else | |
5278 | blank_row (w, it.glyph_row, 0); | |
5279 | ||
5280 | it.glyph_row->y = it.current_y; | |
5281 | it.current_y += it.glyph_row->height; | |
5282 | ||
5283 | /* Clear the rest of the lines. */ | |
5284 | while (it.current_y < it.last_visible_y) | |
5285 | { | |
5286 | ++it.glyph_row; | |
5287 | blank_row (w, it.glyph_row, it.current_y); | |
5288 | it.current_y += it.glyph_row->height; | |
5289 | } | |
5290 | ||
5291 | w->must_be_updated_p = 1; | |
5292 | if (update_frame_p) | |
5293 | { | |
5294 | /* Calling update_single_window is faster when we can use | |
5295 | window-based redisplay. */ | |
5296 | if (FRAME_WINDOW_P (f)) | |
5297 | { | |
5298 | update_single_window (w, 1); | |
5299 | rif->flush_display (f); | |
5300 | } | |
5301 | else | |
5302 | update_frame (f, 1, 1); | |
5303 | } | |
5304 | } | |
5305 | else if (!EQ (mini_window, selected_window)) | |
5306 | windows_or_buffers_changed++; | |
5307 | ||
5308 | /* Prevent redisplay optimization in redisplay_internal by resetting | |
5309 | this_line_start_pos. This is done because the mini-buffer now | |
5310 | displays the message instead of its buffer text. */ | |
5311 | if (EQ (mini_window, selected_window)) | |
5312 | CHARPOS (this_line_start_pos) = 0; | |
5313 | ||
5314 | previous_echo_glyphs = echo_area_glyphs; | |
5315 | previous_echo_area_message = echo_area_message; | |
5316 | previous_echo_glyphs_length = echo_area_glyphs_length; | |
5317 | } | |
5318 | ||
5319 | ||
5320 | \f | |
5321 | /*********************************************************************** | |
5322 | Frame Titles | |
5323 | ***********************************************************************/ | |
5324 | ||
5325 | ||
5326 | #ifdef HAVE_WINDOW_SYSTEM | |
5327 | ||
5328 | /* A buffer for constructing frame titles in it; allocated from the | |
5329 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
5330 | ||
5331 | static char *frame_title_buf; | |
5332 | ||
5333 | /* The buffer's end, and a current output position in it. */ | |
5334 | ||
5335 | static char *frame_title_buf_end; | |
5336 | static char *frame_title_ptr; | |
5337 | ||
5338 | ||
5339 | /* Store a single character C for the frame title in frame_title_buf. | |
5340 | Re-allocate frame_title_buf if necessary. */ | |
5341 | ||
5342 | static void | |
5343 | store_frame_title_char (c) | |
5344 | char c; | |
5345 | { | |
5346 | /* If output position has reached the end of the allocated buffer, | |
5347 | double the buffer's size. */ | |
5348 | if (frame_title_ptr == frame_title_buf_end) | |
5349 | { | |
5350 | int len = frame_title_ptr - frame_title_buf; | |
5351 | int new_size = 2 * len * sizeof *frame_title_buf; | |
5352 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
5353 | frame_title_buf_end = frame_title_buf + new_size; | |
5354 | frame_title_ptr = frame_title_buf + len; | |
5355 | } | |
5356 | ||
5357 | *frame_title_ptr++ = c; | |
5358 | } | |
5359 | ||
5360 | ||
5361 | /* Store part of a frame title in frame_title_buf, beginning at | |
5362 | frame_title_ptr. STR is the string to store. Do not copy more | |
5363 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
5364 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
5365 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
5366 | Called from display_mode_element when it is used to build a frame | |
5367 | title. */ | |
5368 | ||
5369 | static int | |
5370 | store_frame_title (str, field_width, precision) | |
5371 | unsigned char *str; | |
5372 | int field_width, precision; | |
5373 | { | |
5374 | int n = 0; | |
5375 | ||
5376 | /* Copy at most PRECISION chars from STR. */ | |
5377 | while ((precision <= 0 || n < precision) | |
5378 | && *str) | |
5379 | { | |
5380 | store_frame_title_char (*str++); | |
5381 | ++n; | |
5382 | } | |
5383 | ||
5384 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
5385 | while (field_width > 0 | |
5386 | && n < field_width) | |
5387 | { | |
5388 | store_frame_title_char (' '); | |
5389 | ++n; | |
5390 | } | |
5391 | ||
5392 | return n; | |
5393 | } | |
5394 | ||
5395 | ||
5396 | /* Set the title of FRAME, if it has changed. The title format is | |
5397 | Vicon_title_format if FRAME is iconified, otherwise it is | |
5398 | frame_title_format. */ | |
5399 | ||
5400 | static void | |
5401 | x_consider_frame_title (frame) | |
5402 | Lisp_Object frame; | |
5403 | { | |
5404 | struct frame *f = XFRAME (frame); | |
5405 | ||
5406 | if (FRAME_WINDOW_P (f) | |
5407 | || FRAME_MINIBUF_ONLY_P (f) | |
5408 | || f->explicit_name) | |
5409 | { | |
5410 | /* Do we have more than one visible frame on this X display? */ | |
5411 | Lisp_Object tail; | |
5412 | Lisp_Object fmt; | |
5413 | struct buffer *obuf; | |
5414 | int len; | |
5415 | struct it it; | |
5416 | ||
5417 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5418 | { | |
5419 | struct frame *tf = XFRAME (XCONS (tail)->car); | |
5420 | ||
5421 | if (tf != f | |
5422 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
5423 | && !FRAME_MINIBUF_ONLY_P (tf) | |
5424 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
5425 | break; | |
5426 | } | |
5427 | ||
5428 | /* Set global variable indicating that multiple frames exist. */ | |
5429 | multiple_frames = CONSP (tail); | |
5430 | ||
5431 | /* Switch to the buffer of selected window of the frame. Set up | |
5432 | frame_title_ptr so that display_mode_element will output into it; | |
5433 | then display the title. */ | |
5434 | obuf = current_buffer; | |
5435 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
5436 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
5437 | frame_title_ptr = frame_title_buf; | |
5438 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
5439 | NULL, DEFAULT_FACE_ID); | |
5440 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
5441 | frame_title_ptr = NULL; | |
5442 | set_buffer_internal (obuf); | |
5443 | ||
5444 | /* Set the title only if it's changed. This avoids consing in | |
5445 | the common case where it hasn't. (If it turns out that we've | |
5446 | already wasted too much time by walking through the list with | |
5447 | display_mode_element, then we might need to optimize at a | |
5448 | higher level than this.) */ | |
5449 | if (! STRINGP (f->name) | |
5450 | || STRING_BYTES (XSTRING (f->name)) != len | |
5451 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
5452 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
5453 | } | |
5454 | } | |
5455 | ||
5456 | #else /* not HAVE_WINDOW_SYSTEM */ | |
5457 | ||
5458 | #define frame_title_ptr ((char *)0) | |
5459 | #define store_frame_title(str, mincol, maxcol) 0 | |
5460 | ||
5461 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
5462 | ||
5463 | ||
5464 | ||
5465 | \f | |
5466 | /*********************************************************************** | |
5467 | Menu Bars | |
5468 | ***********************************************************************/ | |
5469 | ||
5470 | ||
5471 | /* Prepare for redisplay by updating menu-bar item lists when | |
5472 | appropriate. This can call eval. */ | |
5473 | ||
5474 | void | |
5475 | prepare_menu_bars () | |
5476 | { | |
5477 | int all_windows; | |
5478 | struct gcpro gcpro1, gcpro2; | |
5479 | struct frame *f; | |
5480 | struct frame *tooltip_frame; | |
5481 | ||
5482 | #ifdef HAVE_X_WINDOWS | |
5483 | tooltip_frame = tip_frame; | |
5484 | #else | |
5485 | tooltip_frame = NULL; | |
5486 | #endif | |
5487 | ||
5488 | /* Update all frame titles based on their buffer names, etc. We do | |
5489 | this before the menu bars so that the buffer-menu will show the | |
5490 | up-to-date frame titles. */ | |
5491 | #ifdef HAVE_WINDOW_SYSTEM | |
5492 | if (windows_or_buffers_changed || update_mode_lines) | |
5493 | { | |
5494 | Lisp_Object tail, frame; | |
5495 | ||
5496 | FOR_EACH_FRAME (tail, frame) | |
5497 | { | |
5498 | f = XFRAME (frame); | |
5499 | if (f != tooltip_frame | |
5500 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
5501 | x_consider_frame_title (frame); | |
5502 | } | |
5503 | } | |
5504 | #endif /* HAVE_WINDOW_SYSTEM */ | |
5505 | ||
5506 | /* Update the menu bar item lists, if appropriate. This has to be | |
5507 | done before any actual redisplay or generation of display lines. */ | |
5508 | all_windows = (update_mode_lines | |
5509 | || buffer_shared > 1 | |
5510 | || windows_or_buffers_changed); | |
5511 | if (all_windows) | |
5512 | { | |
5513 | Lisp_Object tail, frame; | |
5514 | int count = specpdl_ptr - specpdl; | |
5515 | ||
5516 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
5517 | ||
5518 | FOR_EACH_FRAME (tail, frame) | |
5519 | { | |
5520 | f = XFRAME (frame); | |
5521 | ||
5522 | /* Ignore tooltip frame. */ | |
5523 | if (f == tooltip_frame) | |
5524 | continue; | |
5525 | ||
5526 | /* If a window on this frame changed size, report that to | |
5527 | the user and clear the size-change flag. */ | |
5528 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
5529 | { | |
5530 | Lisp_Object functions; | |
5531 | ||
5532 | /* Clear flag first in case we get an error below. */ | |
5533 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
5534 | functions = Vwindow_size_change_functions; | |
5535 | GCPRO2 (tail, functions); | |
5536 | ||
5537 | while (CONSP (functions)) | |
5538 | { | |
5539 | call1 (XCAR (functions), frame); | |
5540 | functions = XCDR (functions); | |
5541 | } | |
5542 | UNGCPRO; | |
5543 | } | |
5544 | ||
5545 | GCPRO1 (tail); | |
5546 | update_menu_bar (f, 0); | |
5547 | #ifdef HAVE_WINDOW_SYSTEM | |
5548 | update_toolbar (f, 0); | |
5549 | #endif | |
5550 | UNGCPRO; | |
5551 | } | |
5552 | ||
5553 | unbind_to (count, Qnil); | |
5554 | } | |
5555 | else | |
5556 | { | |
5557 | update_menu_bar (selected_frame, 1); | |
5558 | #ifdef HAVE_WINDOW_SYSTEM | |
5559 | update_toolbar (selected_frame, 1); | |
5560 | #endif | |
5561 | } | |
5562 | ||
5563 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
5564 | pending_menu_activation is not defined. */ | |
5565 | #ifdef USE_X_TOOLKIT | |
5566 | pending_menu_activation = 0; | |
5567 | #endif | |
5568 | } | |
5569 | ||
5570 | ||
5571 | /* Update the menu bar item list for frame F. This has to be done | |
5572 | before we start to fill in any display lines, because it can call | |
5573 | eval. | |
5574 | ||
5575 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
5576 | ||
5577 | static void | |
5578 | update_menu_bar (f, save_match_data) | |
5579 | struct frame *f; | |
5580 | int save_match_data; | |
5581 | { | |
5582 | Lisp_Object window; | |
5583 | register struct window *w; | |
5584 | ||
5585 | window = FRAME_SELECTED_WINDOW (f); | |
5586 | w = XWINDOW (window); | |
5587 | ||
5588 | if (update_mode_lines) | |
5589 | w->update_mode_line = Qt; | |
5590 | ||
5591 | if (FRAME_WINDOW_P (f) | |
5592 | ? | |
5593 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
5594 | FRAME_EXTERNAL_MENU_BAR (f) | |
5595 | #else | |
5596 | FRAME_MENU_BAR_LINES (f) > 0 | |
5597 | #endif | |
5598 | : FRAME_MENU_BAR_LINES (f) > 0) | |
5599 | { | |
5600 | /* If the user has switched buffers or windows, we need to | |
5601 | recompute to reflect the new bindings. But we'll | |
5602 | recompute when update_mode_lines is set too; that means | |
5603 | that people can use force-mode-line-update to request | |
5604 | that the menu bar be recomputed. The adverse effect on | |
5605 | the rest of the redisplay algorithm is about the same as | |
5606 | windows_or_buffers_changed anyway. */ | |
5607 | if (windows_or_buffers_changed | |
5608 | || !NILP (w->update_mode_line) | |
5609 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
5610 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
5611 | != !NILP (w->last_had_star)) | |
5612 | || ((!NILP (Vtransient_mark_mode) | |
5613 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
5614 | != !NILP (w->region_showing))) | |
5615 | { | |
5616 | struct buffer *prev = current_buffer; | |
5617 | int count = specpdl_ptr - specpdl; | |
5618 | ||
5619 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5620 | if (save_match_data) | |
5621 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
5622 | if (NILP (Voverriding_local_map_menu_flag)) | |
5623 | { | |
5624 | specbind (Qoverriding_terminal_local_map, Qnil); | |
5625 | specbind (Qoverriding_local_map, Qnil); | |
5626 | } | |
5627 | ||
5628 | /* Run the Lucid hook. */ | |
5629 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
5630 | ||
5631 | /* If it has changed current-menubar from previous value, | |
5632 | really recompute the menu-bar from the value. */ | |
5633 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
5634 | call0 (Qrecompute_lucid_menubar); | |
5635 | ||
5636 | safe_run_hooks (Qmenu_bar_update_hook); | |
5637 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
5638 | ||
5639 | /* Redisplay the menu bar in case we changed it. */ | |
5640 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
5641 | if (FRAME_WINDOW_P (f)) | |
5642 | set_frame_menubar (f, 0, 0); | |
5643 | else | |
5644 | /* On a terminal screen, the menu bar is an ordinary screen | |
5645 | line, and this makes it get updated. */ | |
5646 | w->update_mode_line = Qt; | |
5647 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
5648 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
5649 | line, and this makes it get updated. */ | |
5650 | w->update_mode_line = Qt; | |
5651 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
5652 | ||
5653 | unbind_to (count, Qnil); | |
5654 | set_buffer_internal_1 (prev); | |
5655 | } | |
5656 | } | |
5657 | } | |
5658 | ||
5659 | ||
5660 | \f | |
5661 | /*********************************************************************** | |
5662 | Toolbars | |
5663 | ***********************************************************************/ | |
5664 | ||
5665 | #ifdef HAVE_WINDOW_SYSTEM | |
5666 | ||
5667 | /* Update the toolbar item list for frame F. This has to be done | |
5668 | before we start to fill in any display lines. Called from | |
5669 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
5670 | and restore it here. */ | |
5671 | ||
5672 | static void | |
5673 | update_toolbar (f, save_match_data) | |
5674 | struct frame *f; | |
5675 | int save_match_data; | |
5676 | { | |
5677 | if (WINDOWP (f->toolbar_window) | |
5678 | && XFASTINT (XWINDOW (f->toolbar_window)->height) > 0) | |
5679 | { | |
5680 | Lisp_Object window; | |
5681 | struct window *w; | |
5682 | ||
5683 | window = FRAME_SELECTED_WINDOW (f); | |
5684 | w = XWINDOW (window); | |
5685 | ||
5686 | /* If the user has switched buffers or windows, we need to | |
5687 | recompute to reflect the new bindings. But we'll | |
5688 | recompute when update_mode_lines is set too; that means | |
5689 | that people can use force-mode-line-update to request | |
5690 | that the menu bar be recomputed. The adverse effect on | |
5691 | the rest of the redisplay algorithm is about the same as | |
5692 | windows_or_buffers_changed anyway. */ | |
5693 | if (windows_or_buffers_changed | |
5694 | || !NILP (w->update_mode_line) | |
5695 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
5696 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
5697 | != !NILP (w->last_had_star)) | |
5698 | || ((!NILP (Vtransient_mark_mode) | |
5699 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
5700 | != !NILP (w->region_showing))) | |
5701 | { | |
5702 | struct buffer *prev = current_buffer; | |
5703 | int count = specpdl_ptr - specpdl; | |
a2889657 | 5704 | |
5f5c8ee5 GM |
5705 | /* Set current_buffer to the buffer of the selected |
5706 | window of the frame, so that we get the right local | |
5707 | keymaps. */ | |
5708 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 5709 | |
5f5c8ee5 GM |
5710 | /* Save match data, if we must. */ |
5711 | if (save_match_data) | |
5712 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
5713 | ||
5714 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
5715 | if (NILP (Voverriding_local_map_menu_flag)) | |
5716 | { | |
5717 | specbind (Qoverriding_terminal_local_map, Qnil); | |
5718 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 5719 | } |
1f40cad2 | 5720 | |
5f5c8ee5 GM |
5721 | /* Build desired toolbar items from keymaps. */ |
5722 | f->desired_toolbar_items | |
5723 | = toolbar_items (f->desired_toolbar_items, | |
5724 | &f->n_desired_toolbar_items); | |
5725 | ||
5726 | /* Redisplay the toolbar in case we changed it. */ | |
5727 | w->update_mode_line = Qt; | |
5728 | ||
5729 | unbind_to (count, Qnil); | |
5730 | set_buffer_internal_1 (prev); | |
81d478f3 | 5731 | } |
a2889657 JB |
5732 | } |
5733 | } | |
5734 | ||
6c4429a5 | 5735 | |
5f5c8ee5 GM |
5736 | /* Set F->desired_toolbar_string to a Lisp string representing frame |
5737 | F's desired toolbar contents. F->desired_toolbar_items must have | |
5738 | been set up previously by calling prepare_menu_bars. */ | |
5739 | ||
a2889657 | 5740 | static void |
5f5c8ee5 GM |
5741 | build_desired_toolbar_string (f) |
5742 | struct frame *f; | |
a2889657 | 5743 | { |
5f5c8ee5 GM |
5744 | int i, size, size_needed, string_idx; |
5745 | struct gcpro gcpro1, gcpro2, gcpro3; | |
5746 | Lisp_Object image, plist, props; | |
a2889657 | 5747 | |
5f5c8ee5 GM |
5748 | image = plist = props = Qnil; |
5749 | GCPRO3 (image, plist, props); | |
a2889657 | 5750 | |
5f5c8ee5 GM |
5751 | /* Prepare F->desired_toolbar_string. If we can reuse it, do so. |
5752 | Otherwise, make a new string. */ | |
5753 | ||
5754 | /* The size of the string we might be able to reuse. */ | |
5755 | size = (STRINGP (f->desired_toolbar_string) | |
5756 | ? XSTRING (f->desired_toolbar_string)->size | |
5757 | : 0); | |
5758 | ||
5759 | /* Each image in the string we build is preceded by a space, | |
5760 | and there is a space at the end. */ | |
5761 | size_needed = f->n_desired_toolbar_items + 1; | |
5762 | ||
5763 | /* Reuse f->desired_toolbar_string, if possible. */ | |
5764 | if (size < size_needed) | |
5765 | f->desired_toolbar_string = Fmake_string (make_number (size_needed), ' '); | |
5766 | else | |
5767 | { | |
5768 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
5769 | Fremove_text_properties (make_number (0), make_number (size), | |
5770 | props, f->desired_toolbar_string); | |
5771 | } | |
a2889657 | 5772 | |
5f5c8ee5 GM |
5773 | /* Put a `display' property on the string for the images to display, |
5774 | put a `menu_item' property on toolbar items with a value that | |
5775 | is the index of the item in F's toolbar item vector. */ | |
5776 | for (i = 0, string_idx = 0; | |
5777 | i < f->n_desired_toolbar_items; | |
5778 | ++i, string_idx += 1) | |
a2889657 | 5779 | { |
5f5c8ee5 GM |
5780 | #define PROP(IDX) \ |
5781 | (XVECTOR (f->desired_toolbar_items) \ | |
5782 | ->contents[i * TOOLBAR_ITEM_NSLOTS + (IDX)]) | |
5783 | ||
5784 | int enabled_p = !NILP (PROP (TOOLBAR_ITEM_ENABLED_P)); | |
5785 | int selected_p = !NILP (PROP (TOOLBAR_ITEM_SELECTED_P)); | |
5786 | int margin, relief; | |
5787 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; | |
5788 | extern Lisp_Object Qlaplace; | |
5789 | ||
5790 | /* If image is a vector, choose the image according to the | |
5791 | button state. */ | |
5792 | image = PROP (TOOLBAR_ITEM_IMAGES); | |
5793 | if (VECTORP (image)) | |
5794 | { | |
5795 | enum toolbar_item_image idx; | |
5796 | ||
5797 | if (enabled_p) | |
5798 | idx = (selected_p | |
5799 | ? TOOLBAR_IMAGE_ENABLED_SELECTED | |
5800 | : TOOLBAR_IMAGE_ENABLED_DESELECTED); | |
5801 | else | |
5802 | idx = (selected_p | |
5803 | ? TOOLBAR_IMAGE_DISABLED_SELECTED | |
5804 | : TOOLBAR_IMAGE_DISABLED_DESELECTED); | |
5805 | ||
5806 | xassert (XVECTOR (image)->size >= idx); | |
5807 | image = XVECTOR (image)->contents[idx]; | |
5808 | } | |
5809 | ||
5810 | /* Ignore invalid image specifications. */ | |
5811 | if (!valid_image_p (image)) | |
5812 | continue; | |
5813 | ||
5814 | /* Display the toolbar button pressed, or depressed. */ | |
5815 | plist = Fcopy_sequence (XCDR (image)); | |
5816 | ||
5817 | /* Compute margin and relief to draw. */ | |
5818 | relief = toolbar_button_relief > 0 ? toolbar_button_relief : 3; | |
5819 | margin = relief + max (0, toolbar_button_margin); | |
5820 | ||
5821 | if (auto_raise_toolbar_buttons_p) | |
5822 | { | |
5823 | /* Add a `:relief' property to the image spec if the item is | |
5824 | selected. */ | |
5825 | if (selected_p) | |
5826 | { | |
5827 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
5828 | margin -= relief; | |
5829 | } | |
5830 | } | |
5831 | else | |
5832 | { | |
5833 | /* If image is selected, display it pressed, i.e. with a | |
5834 | negative relief. If it's not selected, display it with a | |
5835 | raised relief. */ | |
5836 | plist = Fplist_put (plist, QCrelief, | |
5837 | (selected_p | |
5838 | ? make_number (-relief) | |
5839 | : make_number (relief))); | |
5840 | margin -= relief; | |
5841 | } | |
5842 | ||
5843 | /* Put a margin around the image. */ | |
5844 | if (margin) | |
5845 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
5846 | ||
5847 | /* If button is not enabled, make the image appear disabled by | |
5848 | applying an appropriate algorithm to it. */ | |
5849 | if (!enabled_p) | |
5850 | plist = Fplist_put (plist, QCalgorithm, Qlaplace); | |
5851 | ||
5852 | /* Put a `display' text property on the string for the image to | |
5853 | display. Put a `menu-item' property on the string that gives | |
5854 | the start of this item's properties in the toolbar items | |
5855 | vector. */ | |
5856 | image = Fcons (Qimage, plist); | |
5857 | props = list4 (Qdisplay, image, | |
5858 | Qmenu_item, make_number (i * TOOLBAR_ITEM_NSLOTS)), | |
5859 | Fadd_text_properties (make_number (string_idx), | |
5860 | make_number (string_idx + 1), | |
5861 | props, f->desired_toolbar_string); | |
5862 | #undef PROP | |
a2889657 JB |
5863 | } |
5864 | ||
5f5c8ee5 GM |
5865 | UNGCPRO; |
5866 | } | |
5867 | ||
5868 | ||
5869 | /* Display one line of the toolbar of frame IT->f. */ | |
5870 | ||
5871 | static void | |
5872 | display_toolbar_line (it) | |
5873 | struct it *it; | |
5874 | { | |
5875 | struct glyph_row *row = it->glyph_row; | |
5876 | int max_x = it->last_visible_x; | |
5877 | struct glyph *last; | |
5878 | ||
5879 | prepare_desired_row (row); | |
5880 | row->y = it->current_y; | |
5881 | ||
5882 | while (it->current_x < max_x) | |
a2889657 | 5883 | { |
5f5c8ee5 | 5884 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 5885 | |
5f5c8ee5 GM |
5886 | /* Get the next display element. */ |
5887 | if (!get_next_display_element (it)) | |
5888 | break; | |
73af359d | 5889 | |
5f5c8ee5 GM |
5890 | /* Produce glyphs. */ |
5891 | x_before = it->current_x; | |
5892 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
5893 | PRODUCE_GLYPHS (it); | |
daa37602 | 5894 | |
5f5c8ee5 GM |
5895 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
5896 | i = 0; | |
5897 | x = x_before; | |
5898 | while (i < nglyphs) | |
5899 | { | |
5900 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
5901 | ||
5902 | if (x + glyph->pixel_width > max_x) | |
5903 | { | |
5904 | /* Glyph doesn't fit on line. */ | |
5905 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
5906 | it->current_x = x; | |
5907 | goto out; | |
5908 | } | |
daa37602 | 5909 | |
5f5c8ee5 GM |
5910 | ++it->hpos; |
5911 | x += glyph->pixel_width; | |
5912 | ++i; | |
5913 | } | |
5914 | ||
5915 | /* Stop at line ends. */ | |
5916 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
5917 | break; | |
5918 | ||
5919 | set_iterator_to_next (it); | |
a2889657 | 5920 | } |
a2889657 | 5921 | |
5f5c8ee5 | 5922 | out:; |
a2889657 | 5923 | |
5f5c8ee5 GM |
5924 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
5925 | extend_face_to_end_of_line (it); | |
5926 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
5927 | last->right_box_line_p = 1; | |
5928 | compute_line_metrics (it); | |
5929 | ||
5930 | /* If line is empty, make it occupy the rest of the toolbar. */ | |
5931 | if (!row->displays_text_p) | |
5932 | { | |
312246d1 GM |
5933 | row->height = row->phys_height = it->last_visible_y - row->y; |
5934 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
5935 | } |
5936 | ||
5937 | row->full_width_p = 1; | |
5938 | row->continued_p = 0; | |
5939 | row->truncated_on_left_p = 0; | |
5940 | row->truncated_on_right_p = 0; | |
5941 | ||
5942 | it->current_x = it->hpos = 0; | |
5943 | it->current_y += row->height; | |
5944 | ++it->vpos; | |
5945 | ++it->glyph_row; | |
a2889657 | 5946 | } |
96a410bc | 5947 | |
5f5c8ee5 GM |
5948 | |
5949 | /* Value is the number of screen lines needed to make all toolbar | |
5950 | items of frame F visible. */ | |
96a410bc | 5951 | |
d39b6696 | 5952 | static int |
5f5c8ee5 GM |
5953 | toolbar_lines_needed (f) |
5954 | struct frame *f; | |
d39b6696 | 5955 | { |
5f5c8ee5 GM |
5956 | struct window *w = XWINDOW (f->toolbar_window); |
5957 | struct it it; | |
5958 | ||
5959 | /* Initialize an iterator for iteration over F->desired_toolbar_string | |
5960 | in the toolbar window of frame F. */ | |
5961 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOLBAR_FACE_ID); | |
5962 | it.first_visible_x = 0; | |
5963 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
5964 | reseat_to_string (&it, NULL, f->desired_toolbar_string, 0, 0, 0, -1); | |
5965 | ||
5966 | while (!ITERATOR_AT_END_P (&it)) | |
5967 | { | |
5968 | it.glyph_row = w->desired_matrix->rows; | |
5969 | clear_glyph_row (it.glyph_row); | |
5970 | display_toolbar_line (&it); | |
5971 | } | |
5972 | ||
5973 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 5974 | } |
96a410bc | 5975 | |
5f5c8ee5 GM |
5976 | |
5977 | /* Display the toolbar of frame F. Value is non-zero if toolbar's | |
5978 | height should be changed. */ | |
5979 | ||
5980 | static int | |
5981 | redisplay_toolbar (f) | |
5982 | struct frame *f; | |
96a410bc | 5983 | { |
5f5c8ee5 GM |
5984 | struct window *w; |
5985 | struct it it; | |
5986 | struct glyph_row *row; | |
5987 | int change_height_p = 0; | |
5988 | ||
5989 | /* If frame hasn't a toolbar window or if it is zero-height, don't | |
5990 | do anything. This means you must start with toolbar-lines | |
5991 | non-zero to get the auto-sizing effect. Or in other words, you | |
5992 | can turn off toolbars by specifying toolbar-lines zero. */ | |
5993 | if (!WINDOWP (f->toolbar_window) | |
5994 | || (w = XWINDOW (f->toolbar_window), | |
5995 | XFASTINT (w->height) == 0)) | |
5996 | return 0; | |
96a410bc | 5997 | |
5f5c8ee5 GM |
5998 | /* Set up an iterator for the toolbar window. */ |
5999 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOLBAR_FACE_ID); | |
6000 | it.first_visible_x = 0; | |
6001 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6002 | row = it.glyph_row; | |
3450d04c | 6003 | |
5f5c8ee5 GM |
6004 | /* Build a string that represents the contents of the toolbar. */ |
6005 | build_desired_toolbar_string (f); | |
6006 | reseat_to_string (&it, NULL, f->desired_toolbar_string, 0, 0, 0, -1); | |
3450d04c | 6007 | |
5f5c8ee5 GM |
6008 | /* Display as many lines as needed to display all toolbar items. */ |
6009 | while (it.current_y < it.last_visible_y) | |
6010 | display_toolbar_line (&it); | |
3450d04c | 6011 | |
5f5c8ee5 GM |
6012 | /* It doesn't make much sense to try scrolling in the toolbar |
6013 | window, so don't do it. */ | |
6014 | w->desired_matrix->no_scrolling_p = 1; | |
6015 | w->must_be_updated_p = 1; | |
3450d04c | 6016 | |
5f5c8ee5 GM |
6017 | if (auto_resize_toolbars_p) |
6018 | { | |
6019 | int nlines; | |
6020 | ||
6021 | /* If there are blank lines at the end, except for a partially | |
6022 | visible blank line at the end that is smaller than | |
6023 | CANON_Y_UNIT, change the toolbar's height. */ | |
6024 | row = it.glyph_row - 1; | |
6025 | if (!row->displays_text_p | |
6026 | && row->height >= CANON_Y_UNIT (f)) | |
6027 | change_height_p = 1; | |
6028 | ||
6029 | /* If row displays toolbar items, but is partially visible, | |
6030 | change the toolbar's height. */ | |
6031 | if (row->displays_text_p | |
6032 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
6033 | change_height_p = 1; | |
6034 | ||
6035 | /* Resize windows as needed by changing the `toolbar-lines' | |
6036 | frame parameter. */ | |
6037 | if (change_height_p | |
6038 | && (nlines = toolbar_lines_needed (f), | |
6039 | nlines != XFASTINT (w->height))) | |
6040 | { | |
6041 | extern Lisp_Object Qtoolbar_lines; | |
6042 | Lisp_Object frame; | |
6043 | ||
6044 | XSETFRAME (frame, f); | |
6045 | clear_glyph_matrix (w->desired_matrix); | |
6046 | Fmodify_frame_parameters (frame, | |
6047 | Fcons (Fcons (Qtoolbar_lines, | |
6048 | make_number (nlines)), | |
6049 | Qnil)); | |
6050 | fonts_changed_p = 1; | |
6051 | } | |
6052 | } | |
3450d04c | 6053 | |
5f5c8ee5 | 6054 | return change_height_p; |
96a410bc | 6055 | } |
90adcf20 | 6056 | |
5f5c8ee5 GM |
6057 | |
6058 | /* Get information about the toolbar item which is displayed in GLYPH | |
6059 | on frame F. Return in *PROP_IDX the index where toolbar item | |
6060 | properties start in F->current_toolbar_items. Value is zero if | |
6061 | GLYPH doesn't display a toolbar item. */ | |
6062 | ||
6063 | int | |
6064 | toolbar_item_info (f, glyph, prop_idx) | |
6065 | struct frame *f; | |
6066 | struct glyph *glyph; | |
6067 | int *prop_idx; | |
90adcf20 | 6068 | { |
5f5c8ee5 GM |
6069 | Lisp_Object prop; |
6070 | int success_p; | |
6071 | ||
6072 | /* Get the text property `menu-item' at pos. The value of that | |
6073 | property is the start index of this item's properties in | |
6074 | F->current_toolbar_items. */ | |
6075 | prop = Fget_text_property (make_number (glyph->charpos), | |
6076 | Qmenu_item, f->current_toolbar_string); | |
6077 | if (INTEGERP (prop)) | |
6078 | { | |
6079 | *prop_idx = XINT (prop); | |
6080 | success_p = 1; | |
6081 | } | |
6082 | else | |
6083 | success_p = 0; | |
90adcf20 | 6084 | |
5f5c8ee5 GM |
6085 | return success_p; |
6086 | } | |
6087 | ||
6088 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 6089 | |
feb0c42f | 6090 | |
5f5c8ee5 GM |
6091 | \f |
6092 | /************************************************************************ | |
6093 | Horizontal scrolling | |
6094 | ************************************************************************/ | |
feb0c42f | 6095 | |
5f5c8ee5 GM |
6096 | static int hscroll_window_tree P_ ((Lisp_Object)); |
6097 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 6098 | |
5f5c8ee5 GM |
6099 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
6100 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
6101 | that it is not within a certain margin at the window's left and | |
6102 | right border. Value is non-zero if any window's hscroll has been | |
6103 | changed. */ | |
6104 | ||
6105 | static int | |
6106 | hscroll_window_tree (window) | |
6107 | Lisp_Object window; | |
6108 | { | |
6109 | int hscrolled_p = 0; | |
6110 | ||
6111 | while (WINDOWP (window)) | |
90adcf20 | 6112 | { |
5f5c8ee5 GM |
6113 | struct window *w = XWINDOW (window); |
6114 | ||
6115 | if (WINDOWP (w->hchild)) | |
6116 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
6117 | else if (WINDOWP (w->vchild)) | |
6118 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
6119 | else if (w->cursor.vpos >= 0) | |
6120 | { | |
6121 | int hscroll_margin, text_area_x, text_area_y; | |
6122 | int text_area_width, text_area_height; | |
6123 | struct glyph_row *cursor_row = MATRIX_ROW (w->current_matrix, | |
6124 | w->cursor.vpos); | |
a2725ab2 | 6125 | |
5f5c8ee5 GM |
6126 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
6127 | &text_area_width, &text_area_height); | |
90adcf20 | 6128 | |
5f5c8ee5 GM |
6129 | /* Scroll when cursor is inside this scroll margin. */ |
6130 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
6131 | ||
6132 | if ((XFASTINT (w->hscroll) | |
6133 | && w->cursor.x < hscroll_margin) | |
6134 | || (cursor_row->truncated_on_right_p | |
6135 | && (w->cursor.x > text_area_width - hscroll_margin))) | |
08b610e4 | 6136 | { |
5f5c8ee5 GM |
6137 | struct it it; |
6138 | int hscroll; | |
6139 | struct buffer *saved_current_buffer; | |
6140 | int pt; | |
6141 | ||
6142 | /* Find point in a display of infinite width. */ | |
6143 | saved_current_buffer = current_buffer; | |
6144 | current_buffer = XBUFFER (w->buffer); | |
6145 | ||
6146 | if (w == XWINDOW (selected_window)) | |
6147 | pt = BUF_PT (current_buffer); | |
6148 | else | |
08b610e4 | 6149 | { |
5f5c8ee5 GM |
6150 | pt = marker_position (w->pointm); |
6151 | pt = max (BEGV, pt); | |
6152 | pt = min (ZV, pt); | |
6153 | } | |
6154 | ||
6155 | /* Move iterator to pt starting at cursor_row->start in | |
6156 | a line with infinite width. */ | |
6157 | init_to_row_start (&it, w, cursor_row); | |
6158 | it.last_visible_x = INFINITY; | |
6159 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
6160 | current_buffer = saved_current_buffer; | |
6161 | ||
6162 | /* Center cursor in window. */ | |
6163 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
6164 | / CANON_X_UNIT (it.f)); | |
6165 | ||
6166 | /* Don't call Fset_window_hscroll if value hasn't | |
6167 | changed because it will prevent redisplay | |
6168 | optimizations. */ | |
6169 | if (XFASTINT (w->hscroll) != hscroll) | |
6170 | { | |
6171 | Fset_window_hscroll (window, make_number (hscroll)); | |
6172 | hscrolled_p = 1; | |
08b610e4 | 6173 | } |
08b610e4 | 6174 | } |
08b610e4 | 6175 | } |
a2725ab2 | 6176 | |
5f5c8ee5 | 6177 | window = w->next; |
90adcf20 | 6178 | } |
cd6dfed6 | 6179 | |
5f5c8ee5 GM |
6180 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
6181 | return hscrolled_p; | |
6182 | } | |
6183 | ||
6184 | ||
6185 | /* Set hscroll so that cursor is visible and not inside horizontal | |
6186 | scroll margins for all windows in the tree rooted at WINDOW. See | |
6187 | also hscroll_window_tree above. Value is non-zero if any window's | |
6188 | hscroll has been changed. If it has, desired matrices on the frame | |
6189 | of WINDOW are cleared. */ | |
6190 | ||
6191 | static int | |
6192 | hscroll_windows (window) | |
6193 | Lisp_Object window; | |
6194 | { | |
6195 | int hscrolled_p = hscroll_window_tree (window); | |
6196 | if (hscrolled_p) | |
6197 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
6198 | return hscrolled_p; | |
90adcf20 | 6199 | } |
5f5c8ee5 GM |
6200 | |
6201 | ||
90adcf20 | 6202 | \f |
5f5c8ee5 GM |
6203 | /************************************************************************ |
6204 | Redisplay | |
6205 | ************************************************************************/ | |
6206 | ||
6207 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
6208 | to a non-zero value. This is sometimes handy to have in a debugger | |
6209 | session. */ | |
6210 | ||
6211 | #if GLYPH_DEBUG | |
a2889657 | 6212 | |
5f5c8ee5 GM |
6213 | /* Values of beg_unchanged and end_unchanged as of last call to |
6214 | try_window_id. */ | |
6215 | ||
6216 | int debug_beg_unchanged, debug_end_unchanged; | |
6217 | ||
6218 | /* First and last unchanged row for try_window_id. */ | |
6219 | ||
6220 | int debug_first_unchanged_at_end_vpos; | |
6221 | int debug_last_unchanged_at_beg_vpos; | |
6222 | ||
6223 | /* Delta vpos and y. */ | |
6224 | ||
6225 | int debug_dvpos, debug_dy; | |
6226 | ||
6227 | /* Delta in characters and bytes for try_window_id. */ | |
6228 | ||
6229 | int debug_delta, debug_delta_bytes; | |
6230 | ||
6231 | /* Values of window_end_pos and window_end_vpos at the end of | |
6232 | try_window_id. */ | |
6233 | ||
6234 | int debug_end_pos, debug_end_vpos; | |
6235 | ||
6236 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
6237 | format string. A1...A9 are a supplement for a variable-length | |
6238 | argument list. If trace_redisplay_p is non-zero also printf the | |
6239 | resulting string to stderr. */ | |
6240 | ||
6241 | static void | |
6242 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
6243 | struct window *w; | |
6244 | char *fmt; | |
6245 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
6246 | { | |
6247 | char buffer[512]; | |
6248 | char *method = w->desired_matrix->method; | |
6249 | int len = strlen (method); | |
6250 | int size = sizeof w->desired_matrix->method; | |
6251 | int remaining = size - len - 1; | |
6252 | ||
6253 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
6254 | if (len && remaining) | |
6255 | { | |
6256 | method[len] = '|'; | |
6257 | --remaining, ++len; | |
6258 | } | |
6259 | ||
6260 | strncpy (method + len, buffer, remaining); | |
6261 | ||
6262 | if (trace_redisplay_p) | |
6263 | fprintf (stderr, "%p (%s): %s\n", | |
6264 | w, | |
6265 | ((BUFFERP (w->buffer) | |
6266 | && STRINGP (XBUFFER (w->buffer)->name)) | |
6267 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
6268 | : "no buffer"), | |
6269 | buffer); | |
6270 | } | |
a2889657 | 6271 | |
5f5c8ee5 | 6272 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 6273 | |
a2889657 | 6274 | |
5f5c8ee5 GM |
6275 | /* This counter is used to clear the face cache every once in a while |
6276 | in redisplay_internal. It is incremented for each redisplay. | |
6277 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
6278 | cleared. */ | |
0d231165 | 6279 | |
5f5c8ee5 | 6280 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
6281 | static int clear_face_cache_count; |
6282 | ||
20de20dc | 6283 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
6284 | |
6285 | static struct frame *previous_terminal_frame; | |
6286 | ||
6287 | /* Non-zero while redisplay_internal is in progress. */ | |
6288 | ||
6289 | int redisplaying_p; | |
6290 | ||
6291 | ||
6292 | /* Value is non-zero if all changes in window W, which displays | |
6293 | current_buffer, are in the text between START and END. START is a | |
6294 | buffer position, END is given as a distance from Z. Used in | |
6295 | redisplay_internal for display optimization. */ | |
6296 | ||
6297 | static INLINE int | |
6298 | text_outside_line_unchanged_p (w, start, end) | |
6299 | struct window *w; | |
6300 | int start, end; | |
6301 | { | |
6302 | int unchanged_p = 1; | |
6303 | ||
6304 | /* If text or overlays have changed, see where. */ | |
6305 | if (XFASTINT (w->last_modified) < MODIFF | |
6306 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
6307 | { | |
6308 | /* Gap in the line? */ | |
6309 | if (GPT < start || Z - GPT < end) | |
6310 | unchanged_p = 0; | |
6311 | ||
6312 | /* Changes start in front of the line, or end after it? */ | |
6313 | if (unchanged_p | |
6314 | && (beg_unchanged < start - 1 | |
6315 | || end_unchanged < end)) | |
6316 | unchanged_p = 0; | |
6317 | ||
6318 | /* If selective display, can't optimize if changes start at the | |
6319 | beginning of the line. */ | |
6320 | if (unchanged_p | |
6321 | && INTEGERP (current_buffer->selective_display) | |
6322 | && XINT (current_buffer->selective_display) > 0 | |
6323 | && (beg_unchanged < start || GPT <= start)) | |
6324 | unchanged_p = 0; | |
6325 | } | |
6326 | ||
6327 | return unchanged_p; | |
6328 | } | |
6329 | ||
6330 | ||
6331 | /* Do a frame update, taking possible shortcuts into account. This is | |
6332 | the main external entry point for redisplay. | |
6333 | ||
6334 | If the last redisplay displayed an echo area message and that message | |
6335 | is no longer requested, we clear the echo area or bring back the | |
6336 | mini-buffer if that is in use. */ | |
20de20dc | 6337 | |
a2889657 JB |
6338 | void |
6339 | redisplay () | |
e9874cee RS |
6340 | { |
6341 | redisplay_internal (0); | |
6342 | } | |
6343 | ||
5f5c8ee5 GM |
6344 | |
6345 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in | |
6346 | response to any user action; therefore, we should preserve the echo | |
6347 | area. (Actually, our caller does that job.) Perhaps in the future | |
6348 | avoid recentering windows if it is not necessary; currently that | |
6349 | causes some problems. */ | |
e9874cee RS |
6350 | |
6351 | static void | |
6352 | redisplay_internal (preserve_echo_area) | |
6353 | int preserve_echo_area; | |
a2889657 | 6354 | { |
5f5c8ee5 GM |
6355 | struct window *w = XWINDOW (selected_window); |
6356 | struct frame *f = XFRAME (w->frame); | |
6357 | int pause; | |
a2889657 | 6358 | int must_finish = 0; |
5f5c8ee5 | 6359 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 6360 | int number_of_visible_frames; |
a2889657 | 6361 | |
5f5c8ee5 GM |
6362 | /* Non-zero means redisplay has to consider all windows on all |
6363 | frames. Zero means, only selected_window is considered. */ | |
6364 | int consider_all_windows_p; | |
6365 | ||
6366 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
6367 | ||
6368 | /* No redisplay if running in batch mode or frame is not yet fully | |
6369 | initialized, or redisplay is explicitly turned off by setting | |
6370 | Vinhibit_redisplay. */ | |
6371 | if (noninteractive | |
6372 | || !NILP (Vinhibit_redisplay) | |
6373 | || !f->glyphs_initialized_p) | |
a2889657 JB |
6374 | return; |
6375 | ||
5f5c8ee5 GM |
6376 | /* The flag redisplay_performed_directly_p is set by |
6377 | direct_output_for_insert when it already did the whole screen | |
6378 | update necessary. */ | |
6379 | if (redisplay_performed_directly_p) | |
6380 | { | |
6381 | redisplay_performed_directly_p = 0; | |
6382 | if (!hscroll_windows (selected_window)) | |
6383 | return; | |
6384 | } | |
6385 | ||
15f0cf78 RS |
6386 | #ifdef USE_X_TOOLKIT |
6387 | if (popup_activated ()) | |
6388 | return; | |
6389 | #endif | |
6390 | ||
5f5c8ee5 | 6391 | if (redisplaying_p) |
735c094c | 6392 | return; |
5f5c8ee5 | 6393 | ++redisplaying_p; |
735c094c | 6394 | |
8b32d885 RS |
6395 | retry: |
6396 | ||
5f5c8ee5 GM |
6397 | /* If new fonts have been loaded that make a glyph matrix adjustment |
6398 | necessary, do it. */ | |
6399 | if (fonts_changed_p) | |
6400 | { | |
6401 | adjust_glyphs (NULL); | |
6402 | ++windows_or_buffers_changed; | |
6403 | fonts_changed_p = 0; | |
6404 | } | |
6405 | ||
fd8ff63d | 6406 | if (! FRAME_WINDOW_P (selected_frame) |
20de20dc RS |
6407 | && previous_terminal_frame != selected_frame) |
6408 | { | |
5f5c8ee5 GM |
6409 | /* Since frames on an ASCII terminal share the same display |
6410 | area, displaying a different frame means redisplay the whole | |
6411 | thing. */ | |
20de20dc RS |
6412 | windows_or_buffers_changed++; |
6413 | SET_FRAME_GARBAGED (selected_frame); | |
6414 | XSETFRAME (Vterminal_frame, selected_frame); | |
6415 | } | |
6416 | previous_terminal_frame = selected_frame; | |
20de20dc | 6417 | |
5f5c8ee5 GM |
6418 | /* Set the visible flags for all frames. Do this before checking |
6419 | for resized or garbaged frames; they want to know if their frames | |
6420 | are visible. See the comment in frame.h for | |
6421 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 6422 | { |
35f56f96 | 6423 | Lisp_Object tail, frame; |
d724d989 | 6424 | |
89819bdd RS |
6425 | number_of_visible_frames = 0; |
6426 | ||
35f56f96 | 6427 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 6428 | { |
5f5c8ee5 GM |
6429 | struct frame *f = XFRAME (frame); |
6430 | ||
6431 | FRAME_SAMPLE_VISIBILITY (f); | |
6432 | if (FRAME_VISIBLE_P (f)) | |
6433 | ++number_of_visible_frames; | |
6434 | clear_desired_matrices (f); | |
f82aff7c | 6435 | } |
d724d989 JB |
6436 | } |
6437 | ||
44fa5b1e | 6438 | /* Notice any pending interrupt request to change frame size. */ |
a2889657 JB |
6439 | do_pending_window_change (); |
6440 | ||
5f5c8ee5 | 6441 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 6442 | if (frame_garbaged) |
a2889657 | 6443 | { |
5f5c8ee5 GM |
6444 | /* Old redisplay called redraw_garbaged_frames here which in |
6445 | turn called redraw_frame which in turn called clear_frame. | |
6446 | The call to clear_frame is a source of flickering. After | |
6447 | checking the places where SET_FRAME_GARBAGED is called, I | |
6448 | believe a clear_frame is not necessary. It should suffice in | |
6449 | the new redisplay to invalidate all current matrices, and | |
6450 | ensure a complete redisplay of all windows. */ | |
6451 | Lisp_Object tail, frame; | |
6452 | ||
6453 | FOR_EACH_FRAME (tail, frame) | |
6454 | { | |
6455 | struct frame *f = XFRAME (frame); | |
6456 | ||
6457 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
6458 | { | |
6459 | clear_current_matrices (f); | |
6460 | f->garbaged = 0; | |
6461 | } | |
6462 | } | |
6463 | ||
44fa5b1e | 6464 | frame_garbaged = 0; |
5f5c8ee5 | 6465 | ++windows_or_buffers_changed; |
a2889657 JB |
6466 | } |
6467 | ||
5f5c8ee5 | 6468 | /* Build menubar and toolbar items. */ |
f82aff7c RS |
6469 | prepare_menu_bars (); |
6470 | ||
28995e67 | 6471 | if (windows_or_buffers_changed) |
a2889657 JB |
6472 | update_mode_lines++; |
6473 | ||
538f13d4 RS |
6474 | /* Detect case that we need to write or remove a star in the mode line. */ |
6475 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
6476 | { |
6477 | w->update_mode_line = Qt; | |
6478 | if (buffer_shared > 1) | |
6479 | update_mode_lines++; | |
6480 | } | |
6481 | ||
5f5c8ee5 | 6482 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
6483 | if (!NILP (w->column_number_displayed) |
6484 | /* This alternative quickly identifies a common case | |
6485 | where no change is needed. */ | |
6486 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
6487 | && XFASTINT (w->last_modified) >= MODIFF |
6488 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
6489 | && XFASTINT (w->column_number_displayed) != current_column ()) |
6490 | w->update_mode_line = Qt; | |
6491 | ||
44fa5b1e | 6492 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 6493 | |
5f5c8ee5 GM |
6494 | /* The variable buffer_shared is set in redisplay_window and |
6495 | indicates that we redisplay a buffer in different windows. See | |
6496 | there. */ | |
6497 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
6498 | |
6499 | /* If specs for an arrow have changed, do thorough redisplay | |
6500 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 6501 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 6502 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 6503 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 6504 | |
90adcf20 RS |
6505 | /* Normally the message* functions will have already displayed and |
6506 | updated the echo area, but the frame may have been trashed, or | |
6507 | the update may have been preempted, so display the echo area | |
6508 | again here. */ | |
5f5c8ee5 GM |
6509 | if (echo_area_glyphs |
6510 | || STRINGP (echo_area_message) | |
6511 | || previous_echo_glyphs | |
6512 | || STRINGP (previous_echo_area_message)) | |
90adcf20 | 6513 | { |
5f5c8ee5 | 6514 | echo_area_display (0); |
90adcf20 RS |
6515 | must_finish = 1; |
6516 | } | |
6517 | ||
5f5c8ee5 GM |
6518 | /* If showing the region, and mark has changed, we must redisplay |
6519 | the whole window. The assignment to this_line_start_pos prevents | |
6520 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
6521 | if (((!NILP (Vtransient_mark_mode) |
6522 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6523 | != !NILP (w->region_showing)) | |
82d04750 JB |
6524 | || (!NILP (w->region_showing) |
6525 | && !EQ (w->region_showing, | |
6526 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
6527 | CHARPOS (this_line_start_pos) = 0; |
6528 | ||
6529 | /* Optimize the case that only the line containing the cursor in the | |
6530 | selected window has changed. Variables starting with this_ are | |
6531 | set in display_line and record information about the line | |
6532 | containing the cursor. */ | |
6533 | tlbufpos = this_line_start_pos; | |
6534 | tlendpos = this_line_end_pos; | |
6535 | if (!consider_all_windows_p | |
6536 | && CHARPOS (tlbufpos) > 0 | |
6537 | && NILP (w->update_mode_line) | |
73af359d | 6538 | && !current_buffer->clip_changed |
44fa5b1e | 6539 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 6540 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 6541 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
6542 | && this_line_buffer == current_buffer |
6543 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 6544 | && NILP (w->force_start) |
5f5c8ee5 GM |
6545 | /* Point must be on the line that we have info recorded about. */ |
6546 | && PT >= CHARPOS (tlbufpos) | |
6547 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
6548 | /* All text outside that line, including its final newline, |
6549 | must be unchanged */ | |
5f5c8ee5 GM |
6550 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
6551 | CHARPOS (tlendpos))) | |
6552 | { | |
6553 | if (CHARPOS (tlbufpos) > BEGV | |
6554 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
6555 | && (CHARPOS (tlbufpos) == ZV | |
6556 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
6557 | /* Former continuation line has disappeared by becoming empty */ |
6558 | goto cancel; | |
6559 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 6560 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
6561 | || MINI_WINDOW_P (w)) |
6562 | { | |
1c9241f5 KH |
6563 | /* We have to handle the case of continuation around a |
6564 | wide-column character (See the comment in indent.c around | |
6565 | line 885). | |
6566 | ||
6567 | For instance, in the following case: | |
6568 | ||
6569 | -------- Insert -------- | |
6570 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
6571 | J_I_ ==> J_I_ `^^' are cursors. | |
6572 | ^^ ^^ | |
6573 | -------- -------- | |
6574 | ||
6575 | As we have to redraw the line above, we should goto cancel. */ | |
6576 | ||
5f5c8ee5 GM |
6577 | struct it it; |
6578 | int line_height_before = this_line_pixel_height; | |
6579 | ||
6580 | /* Note that start_display will handle the case that the | |
6581 | line starting at tlbufpos is a continuation lines. */ | |
6582 | start_display (&it, w, tlbufpos); | |
6583 | ||
6584 | /* Implementation note: It this still necessary? */ | |
6585 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
6586 | goto cancel; |
6587 | ||
5f5c8ee5 GM |
6588 | TRACE ((stderr, "trying display optimization 1\n")); |
6589 | w->cursor.vpos = -1; | |
a2889657 | 6590 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
6591 | it.vpos = this_line_vpos; |
6592 | it.current_y = this_line_y; | |
6593 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
6594 | display_line (&it); | |
6595 | ||
a2889657 | 6596 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
6597 | and ends at same distance from eob as before, we win */ |
6598 | if (w->cursor.vpos >= 0 | |
6599 | /* Line is not continued, otherwise this_line_start_pos | |
6600 | would have been set to 0 in display_line. */ | |
6601 | && CHARPOS (this_line_start_pos) | |
6602 | /* Line ends as before. */ | |
6603 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
6604 | /* Line has same height as before. Otherwise other lines | |
6605 | would have to be shifted up or down. */ | |
6606 | && this_line_pixel_height == line_height_before) | |
a2889657 | 6607 | { |
5f5c8ee5 GM |
6608 | /* If this is not the window's last line, we must adjust |
6609 | the charstarts of the lines below. */ | |
6610 | if (it.current_y < it.last_visible_y) | |
6611 | { | |
6612 | struct glyph_row *row | |
6613 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
6614 | int delta, delta_bytes; | |
6615 | ||
6616 | if (Z - CHARPOS (tlendpos) == ZV) | |
6617 | { | |
6618 | /* This line ends at end of (accessible part of) | |
6619 | buffer. There is no newline to count. */ | |
6620 | delta = (Z | |
6621 | - CHARPOS (tlendpos) | |
6622 | - MATRIX_ROW_START_CHARPOS (row)); | |
6623 | delta_bytes = (Z_BYTE | |
6624 | - BYTEPOS (tlendpos) | |
6625 | - MATRIX_ROW_START_BYTEPOS (row)); | |
6626 | } | |
6627 | else | |
6628 | { | |
6629 | /* This line ends in a newline. Must take | |
6630 | account of the newline and the rest of the | |
6631 | text that follows. */ | |
6632 | delta = (Z | |
6633 | - CHARPOS (tlendpos) | |
6634 | - MATRIX_ROW_START_CHARPOS (row)); | |
6635 | delta_bytes = (Z_BYTE | |
6636 | - BYTEPOS (tlendpos) | |
6637 | - MATRIX_ROW_START_BYTEPOS (row)); | |
6638 | } | |
6639 | ||
6640 | increment_glyph_matrix_buffer_positions (w->current_matrix, | |
6641 | this_line_vpos + 1, | |
6642 | w->current_matrix->nrows, | |
6643 | delta, delta_bytes); | |
85bcef6c | 6644 | } |
46db8486 | 6645 | |
5f5c8ee5 GM |
6646 | /* If this row displays text now but previously didn't, |
6647 | or vice versa, w->window_end_vpos may have to be | |
6648 | adjusted. */ | |
6649 | if ((it.glyph_row - 1)->displays_text_p) | |
6650 | { | |
6651 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
6652 | XSETINT (w->window_end_vpos, this_line_vpos); | |
6653 | } | |
6654 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
6655 | && this_line_vpos > 0) | |
6656 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
6657 | w->window_end_valid = Qnil; | |
6658 | ||
6659 | /* Update hint: No need to try to scroll in update_window. */ | |
6660 | w->desired_matrix->no_scrolling_p = 1; | |
6661 | ||
6662 | #if GLYPH_DEBUG | |
6663 | *w->desired_matrix->method = 0; | |
6664 | debug_method_add (w, "optimization 1"); | |
6665 | #endif | |
a2889657 JB |
6666 | goto update; |
6667 | } | |
6668 | else | |
6669 | goto cancel; | |
6670 | } | |
5f5c8ee5 GM |
6671 | else if (/* Cursor position hasn't changed. */ |
6672 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
6673 | /* Make sure the cursor was last displayed |
6674 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
6675 | && 0 <= w->cursor.vpos |
6676 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
6677 | { |
6678 | if (!must_finish) | |
6679 | { | |
6680 | do_pending_window_change (); | |
5f5c8ee5 GM |
6681 | |
6682 | /* We used to always goto end_of_redisplay here, but this | |
6683 | isn't enough if we have a blinking cursor. */ | |
6684 | if (w->cursor_off_p == w->last_cursor_off_p) | |
6685 | goto end_of_redisplay; | |
a2889657 JB |
6686 | } |
6687 | goto update; | |
6688 | } | |
8b51f1e3 KH |
6689 | /* If highlighting the region, or if the cursor is in the echo area, |
6690 | then we can't just move the cursor. */ | |
bd66d1ba RS |
6691 | else if (! (!NILP (Vtransient_mark_mode) |
6692 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
6693 | && (w == XWINDOW (current_buffer->last_selected_window) |
6694 | || highlight_nonselected_windows) | |
8b51f1e3 KH |
6695 | && NILP (w->region_showing) |
6696 | && !cursor_in_echo_area) | |
a2889657 | 6697 | { |
5f5c8ee5 GM |
6698 | struct it it; |
6699 | struct glyph_row *row; | |
6700 | ||
6701 | /* Skip from tlbufpos to PT and see where it is. Note that | |
6702 | PT may be in invisible text. If so, we will end at the | |
6703 | next visible position. */ | |
6704 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
6705 | NULL, DEFAULT_FACE_ID); | |
6706 | it.current_x = this_line_start_x; | |
6707 | it.current_y = this_line_y; | |
6708 | it.vpos = this_line_vpos; | |
6709 | ||
6710 | /* The call to move_it_to stops in front of PT, but | |
6711 | moves over before-strings. */ | |
6712 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
6713 | ||
6714 | if (it.vpos == this_line_vpos | |
6715 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
6716 | row->enabled_p)) | |
a2889657 | 6717 | { |
5f5c8ee5 GM |
6718 | xassert (this_line_vpos == it.vpos); |
6719 | xassert (this_line_y == it.current_y); | |
6720 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
6721 | goto update; |
6722 | } | |
6723 | else | |
6724 | goto cancel; | |
6725 | } | |
5f5c8ee5 | 6726 | |
a2889657 | 6727 | cancel: |
5f5c8ee5 GM |
6728 | /* Text changed drastically or point moved off of line. */ |
6729 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
6730 | } |
6731 | ||
5f5c8ee5 GM |
6732 | CHARPOS (this_line_start_pos) = 0; |
6733 | consider_all_windows_p |= buffer_shared > 1; | |
6734 | ++clear_face_cache_count; | |
a2889657 | 6735 | |
5f5c8ee5 GM |
6736 | |
6737 | /* Build desired matrices. If consider_all_windows_p is non-zero, | |
6738 | do it for all windows on all frames. Otherwise do it for | |
6739 | selected_window, only. */ | |
463f6b91 | 6740 | |
5f5c8ee5 | 6741 | if (consider_all_windows_p) |
a2889657 | 6742 | { |
35f56f96 | 6743 | Lisp_Object tail, frame; |
a2889657 | 6744 | |
5f5c8ee5 GM |
6745 | /* Clear the face cache eventually. */ |
6746 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 6747 | { |
5f5c8ee5 | 6748 | clear_face_cache (0); |
463f6b91 RS |
6749 | clear_face_cache_count = 0; |
6750 | } | |
31b24551 | 6751 | |
5f5c8ee5 GM |
6752 | /* Recompute # windows showing selected buffer. This will be |
6753 | incremented each time such a window is displayed. */ | |
a2889657 JB |
6754 | buffer_shared = 0; |
6755 | ||
35f56f96 | 6756 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 6757 | { |
5f5c8ee5 | 6758 | struct frame *f = XFRAME (frame); |
fd8ff63d | 6759 | if (FRAME_WINDOW_P (f) || f == selected_frame) |
9769686d | 6760 | { |
5f5c8ee5 GM |
6761 | /* Mark all the scroll bars to be removed; we'll redeem |
6762 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
6763 | if (condemn_scroll_bars_hook) |
6764 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 6765 | |
f21ef775 | 6766 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 6767 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 6768 | |
5f5c8ee5 GM |
6769 | /* Any scroll bars which redisplay_windows should have |
6770 | nuked should now go away. */ | |
9769686d RS |
6771 | if (judge_scroll_bars_hook) |
6772 | (*judge_scroll_bars_hook) (f); | |
6773 | } | |
30c566e4 | 6774 | } |
a2889657 | 6775 | } |
5f5c8ee5 GM |
6776 | else if (FRAME_VISIBLE_P (selected_frame) |
6777 | && !FRAME_OBSCURED_P (selected_frame)) | |
6778 | redisplay_window (selected_window, 1); | |
6779 | ||
6780 | ||
6781 | /* Compare desired and current matrices, perform output. */ | |
6782 | ||
6783 | update: | |
6784 | ||
6785 | /* If fonts changed, display again. */ | |
6786 | if (fonts_changed_p) | |
6787 | goto retry; | |
a2889657 | 6788 | |
a2889657 JB |
6789 | /* Prevent various kinds of signals during display update. |
6790 | stdio is not robust about handling signals, | |
6791 | which can cause an apparent I/O error. */ | |
6792 | if (interrupt_input) | |
6793 | unrequest_sigio (); | |
6794 | stop_polling (); | |
6795 | ||
5f5c8ee5 | 6796 | if (consider_all_windows_p) |
a2889657 JB |
6797 | { |
6798 | Lisp_Object tail; | |
6799 | ||
6800 | pause = 0; | |
6801 | ||
44fa5b1e | 6802 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 6803 | { |
5f5c8ee5 | 6804 | struct frame *f; |
a2889657 | 6805 | |
e24c997d | 6806 | if (!FRAMEP (XCONS (tail)->car)) |
a2889657 JB |
6807 | continue; |
6808 | ||
44fa5b1e | 6809 | f = XFRAME (XCONS (tail)->car); |
1af9f229 | 6810 | |
fd8ff63d | 6811 | if ((FRAME_WINDOW_P (f) || f == selected_frame) |
f21ef775 | 6812 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 6813 | { |
5f5c8ee5 GM |
6814 | /* Mark all windows as to be updated. */ |
6815 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
44fa5b1e | 6816 | pause |= update_frame (f, 0, 0); |
a2889657 | 6817 | if (!pause) |
efc63ef0 | 6818 | { |
5f5c8ee5 GM |
6819 | if (hscroll_windows (f->root_window)) |
6820 | goto retry; | |
6821 | ||
efc63ef0 RS |
6822 | mark_window_display_accurate (f->root_window, 1); |
6823 | if (frame_up_to_date_hook != 0) | |
6824 | (*frame_up_to_date_hook) (f); | |
6825 | } | |
a2889657 JB |
6826 | } |
6827 | } | |
6828 | } | |
6829 | else | |
6e8290aa | 6830 | { |
5f5c8ee5 GM |
6831 | if (FRAME_VISIBLE_P (selected_frame) |
6832 | && !FRAME_OBSCURED_P (selected_frame)) | |
6833 | { | |
6834 | XWINDOW (selected_window)->must_be_updated_p = 1; | |
6835 | pause = update_frame (selected_frame, 0, 0); | |
6836 | if (!pause && hscroll_windows (selected_window)) | |
6837 | goto retry; | |
6838 | } | |
4d641a15 KH |
6839 | else |
6840 | pause = 0; | |
d724d989 | 6841 | |
8de2d90b | 6842 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
6843 | function. If the echo area is on another frame, that may |
6844 | have put text on a frame other than the selected one, so the | |
6845 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
6846 | it here. */ |
6847 | { | |
84faf44c | 6848 | Lisp_Object mini_window; |
5f5c8ee5 | 6849 | struct frame *mini_frame; |
84faf44c RS |
6850 | |
6851 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
6852 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 6853 | |
fd8ff63d | 6854 | if (mini_frame != selected_frame && FRAME_WINDOW_P (mini_frame)) |
5f5c8ee5 GM |
6855 | { |
6856 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
6857 | pause |= update_frame (mini_frame, 0, 0); | |
6858 | if (!pause && hscroll_windows (mini_window)) | |
6859 | goto retry; | |
6860 | } | |
8de2d90b | 6861 | } |
6e8290aa | 6862 | } |
a2889657 | 6863 | |
5f5c8ee5 GM |
6864 | /* If display was paused because of pending input, make sure we do a |
6865 | thorough update the next time. */ | |
a2889657 JB |
6866 | if (pause) |
6867 | { | |
5f5c8ee5 GM |
6868 | /* Prevent the optimization at the beginning of |
6869 | redisplay_internal that tries a single-line update of the | |
6870 | line containing the cursor in the selected window. */ | |
6871 | CHARPOS (this_line_start_pos) = 0; | |
6872 | ||
6873 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 6874 | if (!NILP (last_arrow_position)) |
a2889657 JB |
6875 | { |
6876 | last_arrow_position = Qt; | |
6877 | last_arrow_string = Qt; | |
6878 | } | |
5f5c8ee5 GM |
6879 | |
6880 | /* If we pause after scrolling, some rows in the current | |
6881 | matrices of some windows are not valid. */ | |
6882 | if (!WINDOW_FULL_WIDTH_P (w) | |
6883 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
6884 | update_mode_lines = 1; |
6885 | } | |
6886 | ||
5f5c8ee5 GM |
6887 | /* Now text on frame agrees with windows, so put info into the |
6888 | windows for partial redisplay to follow. */ | |
a2889657 JB |
6889 | if (!pause) |
6890 | { | |
6891 | register struct buffer *b = XBUFFER (w->buffer); | |
6892 | ||
a2889657 | 6893 | unchanged_modified = BUF_MODIFF (b); |
8850a573 | 6894 | overlay_unchanged_modified = BUF_OVERLAY_MODIFF (b); |
a2889657 JB |
6895 | beg_unchanged = BUF_GPT (b) - BUF_BEG (b); |
6896 | end_unchanged = BUF_Z (b) - BUF_GPT (b); | |
6897 | ||
5f5c8ee5 | 6898 | if (consider_all_windows_p) |
11e82b76 | 6899 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
6900 | else |
6901 | { | |
5f5c8ee5 GM |
6902 | XSETFASTINT (w->last_point, BUF_PT (b)); |
6903 | w->last_cursor = w->cursor; | |
6904 | w->last_cursor_off_p = w->cursor_off_p; | |
6905 | ||
28995e67 | 6906 | b->clip_changed = 0; |
a2889657 | 6907 | w->update_mode_line = Qnil; |
c2213350 | 6908 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 6909 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
6910 | w->last_had_star |
6911 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6912 | ? Qt : Qnil); | |
3ee4159a RS |
6913 | |
6914 | /* Record if we are showing a region, so can make sure to | |
6915 | update it fully at next redisplay. */ | |
6916 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
6917 | && (w == XWINDOW (current_buffer->last_selected_window) |
6918 | || highlight_nonselected_windows) | |
3ee4159a RS |
6919 | && !NILP (XBUFFER (w->buffer)->mark_active) |
6920 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
6921 | : Qnil); | |
6922 | ||
d2f84654 | 6923 | w->window_end_valid = w->buffer; |
d45de95b | 6924 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 6925 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 RS |
6926 | if (frame_up_to_date_hook != 0) |
6927 | (*frame_up_to_date_hook) (selected_frame); | |
a2889657 | 6928 | } |
5f5c8ee5 | 6929 | |
a2889657 JB |
6930 | update_mode_lines = 0; |
6931 | windows_or_buffers_changed = 0; | |
6932 | } | |
6933 | ||
5f5c8ee5 GM |
6934 | /* Start SIGIO interrupts coming again. Having them off during the |
6935 | code above makes it less likely one will discard output, but not | |
6936 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 6937 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
6938 | if (interrupt_input) |
6939 | request_sigio (); | |
6940 | start_polling (); | |
6941 | ||
5f5c8ee5 GM |
6942 | /* If a frame has become visible which was not before, redisplay |
6943 | again, so that we display it. Expose events for such a frame | |
6944 | (which it gets when becoming visible) don't call the parts of | |
6945 | redisplay constructing glyphs, so simply exposing a frame won't | |
6946 | display anything in this case. So, we have to display these | |
6947 | frames here explicitly. */ | |
11c52c4f RS |
6948 | if (!pause) |
6949 | { | |
6950 | Lisp_Object tail, frame; | |
6951 | int new_count = 0; | |
6952 | ||
6953 | FOR_EACH_FRAME (tail, frame) | |
6954 | { | |
6955 | int this_is_visible = 0; | |
8e83f802 RS |
6956 | |
6957 | if (XFRAME (frame)->visible) | |
6958 | this_is_visible = 1; | |
6959 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
6960 | if (XFRAME (frame)->visible) | |
6961 | this_is_visible = 1; | |
11c52c4f RS |
6962 | |
6963 | if (this_is_visible) | |
6964 | new_count++; | |
6965 | } | |
6966 | ||
89819bdd | 6967 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
6968 | windows_or_buffers_changed++; |
6969 | } | |
6970 | ||
44fa5b1e | 6971 | /* Change frame size now if a change is pending. */ |
a2889657 | 6972 | do_pending_window_change (); |
d8e242fd | 6973 | |
8b32d885 RS |
6974 | /* If we just did a pending size change, or have additional |
6975 | visible frames, redisplay again. */ | |
3c8c72e0 | 6976 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 6977 | goto retry; |
5f5c8ee5 GM |
6978 | |
6979 | end_of_redisplay:; | |
6980 | ||
6981 | if (--redisplaying_p < 0) | |
6982 | redisplaying_p = 0; | |
a2889657 JB |
6983 | } |
6984 | ||
5f5c8ee5 GM |
6985 | |
6986 | /* Redisplay, but leave alone any recent echo area message unless | |
6987 | another message has been requested in its place. | |
a2889657 JB |
6988 | |
6989 | This is useful in situations where you need to redisplay but no | |
6990 | user action has occurred, making it inappropriate for the message | |
6991 | area to be cleared. See tracking_off and | |
6992 | wait_reading_process_input for examples of these situations. */ | |
6993 | ||
8991bb31 | 6994 | void |
a2889657 JB |
6995 | redisplay_preserve_echo_area () |
6996 | { | |
5f5c8ee5 GM |
6997 | if (!echo_area_glyphs |
6998 | && !STRINGP (echo_area_message) | |
6999 | && (previous_echo_glyphs | |
7000 | || STRINGP (previous_echo_area_message))) | |
a2889657 JB |
7001 | { |
7002 | echo_area_glyphs = previous_echo_glyphs; | |
5f5c8ee5 GM |
7003 | echo_area_message = previous_echo_area_message; |
7004 | echo_area_glyphs_length = previous_echo_glyphs_length; | |
e9874cee | 7005 | redisplay_internal (1); |
5f5c8ee5 GM |
7006 | echo_area_glyphs = NULL; |
7007 | echo_area_message = Qnil; | |
a2889657 JB |
7008 | } |
7009 | else | |
e9874cee | 7010 | redisplay_internal (1); |
a2889657 JB |
7011 | } |
7012 | ||
5f5c8ee5 GM |
7013 | |
7014 | /* Mark the display of windows in the window tree rooted at WINDOW as | |
7015 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
7016 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
7017 | the next time redisplay_internal is called. */ | |
7018 | ||
a2889657 | 7019 | void |
5f5c8ee5 | 7020 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 7021 | Lisp_Object window; |
5f5c8ee5 | 7022 | int accurate_p; |
a2889657 | 7023 | { |
5f5c8ee5 GM |
7024 | struct window *w; |
7025 | ||
7026 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
7027 | { |
7028 | w = XWINDOW (window); | |
7029 | ||
5f5c8ee5 | 7030 | if (BUFFERP (w->buffer)) |
bd66d1ba | 7031 | { |
5f5c8ee5 GM |
7032 | struct buffer *b = XBUFFER (w->buffer); |
7033 | ||
c2213350 | 7034 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 7035 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 7036 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
7037 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
7038 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
7039 | ? Qt : Qnil); | |
bd66d1ba | 7040 | |
5f5c8ee5 GM |
7041 | #if 0 /* I don't think this is necessary because display_line does it. |
7042 | Let's check it. */ | |
bd66d1ba RS |
7043 | /* Record if we are showing a region, so can make sure to |
7044 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
7045 | w->region_showing |
7046 | = (!NILP (Vtransient_mark_mode) | |
7047 | && (w == XWINDOW (current_buffer->last_selected_window) | |
7048 | || highlight_nonselected_windows) | |
7049 | && (!NILP (b->mark_active) | |
7050 | ? Fmarker_position (b->mark) | |
7051 | : Qnil)); | |
7052 | #endif | |
7053 | ||
7054 | if (accurate_p) | |
7055 | { | |
7056 | b->clip_changed = 0; | |
7057 | w->last_cursor = w->cursor; | |
7058 | w->last_cursor_off_p = w->cursor_off_p; | |
7059 | if (w == XWINDOW (selected_window)) | |
7060 | w->last_point = BUF_PT (b); | |
7061 | else | |
7062 | w->last_point = XMARKER (w->pointm)->charpos; | |
7063 | } | |
bd66d1ba RS |
7064 | } |
7065 | ||
d2f84654 | 7066 | w->window_end_valid = w->buffer; |
a2889657 JB |
7067 | w->update_mode_line = Qnil; |
7068 | ||
265a9e55 | 7069 | if (!NILP (w->vchild)) |
5f5c8ee5 | 7070 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 7071 | if (!NILP (w->hchild)) |
5f5c8ee5 | 7072 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
7073 | } |
7074 | ||
5f5c8ee5 | 7075 | if (accurate_p) |
a2889657 | 7076 | { |
d45de95b | 7077 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
7078 | last_arrow_string = Voverlay_arrow_string; |
7079 | } | |
7080 | else | |
7081 | { | |
5f5c8ee5 GM |
7082 | /* Force a thorough redisplay the next time by setting |
7083 | last_arrow_position and last_arrow_string to t, which is | |
7084 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
7085 | last_arrow_position = Qt; |
7086 | last_arrow_string = Qt; | |
7087 | } | |
7088 | } | |
5f5c8ee5 GM |
7089 | |
7090 | ||
7091 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
7092 | C. Since a display table doesn't have any parent, we don't have to | |
7093 | follow parent. Do not call this function directly but use the | |
7094 | macro DISP_CHAR_VECTOR. */ | |
7095 | ||
7096 | Lisp_Object | |
7097 | disp_char_vector (dp, c) | |
7098 | struct Lisp_Char_Table *dp; | |
7099 | int c; | |
7100 | { | |
7101 | int code[4], i; | |
7102 | Lisp_Object val; | |
7103 | ||
7104 | if (SINGLE_BYTE_CHAR_P (c)) | |
7105 | return (dp->contents[c]); | |
7106 | ||
7107 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
7108 | if (code[0] != CHARSET_COMPOSITION) | |
7109 | { | |
7110 | if (code[1] < 32) | |
7111 | code[1] = -1; | |
7112 | else if (code[2] < 32) | |
7113 | code[2] = -1; | |
7114 | } | |
7115 | ||
7116 | /* Here, the possible range of code[0] (== charset ID) is | |
7117 | 128..max_charset. Since the top level char table contains data | |
7118 | for multibyte characters after 256th element, we must increment | |
7119 | code[0] by 128 to get a correct index. */ | |
7120 | code[0] += 128; | |
7121 | code[3] = -1; /* anchor */ | |
7122 | ||
7123 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
7124 | { | |
7125 | val = dp->contents[code[i]]; | |
7126 | if (!SUB_CHAR_TABLE_P (val)) | |
7127 | return (NILP (val) ? dp->defalt : val); | |
7128 | } | |
7129 | ||
7130 | /* Here, val is a sub char table. We return the default value of | |
7131 | it. */ | |
7132 | return (dp->defalt); | |
7133 | } | |
7134 | ||
7135 | ||
a2889657 | 7136 | \f |
5f5c8ee5 GM |
7137 | /*********************************************************************** |
7138 | Window Redisplay | |
7139 | ***********************************************************************/ | |
a2725ab2 | 7140 | |
5f5c8ee5 | 7141 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
7142 | |
7143 | static void | |
5f5c8ee5 GM |
7144 | redisplay_windows (window) |
7145 | Lisp_Object window; | |
90adcf20 | 7146 | { |
5f5c8ee5 GM |
7147 | while (!NILP (window)) |
7148 | { | |
7149 | struct window *w = XWINDOW (window); | |
7150 | ||
7151 | if (!NILP (w->hchild)) | |
7152 | redisplay_windows (w->hchild); | |
7153 | else if (!NILP (w->vchild)) | |
7154 | redisplay_windows (w->vchild); | |
7155 | else | |
7156 | redisplay_window (window, 0); | |
a2725ab2 | 7157 | |
5f5c8ee5 GM |
7158 | window = w->next; |
7159 | } | |
7160 | } | |
7161 | ||
7162 | ||
7163 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
7164 | DELTA is the number of bytes by which positions recorded in ROW | |
7165 | differ from current buffer positions. */ | |
7166 | ||
7167 | void | |
7168 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
7169 | struct window *w; | |
7170 | struct glyph_row *row; | |
7171 | struct glyph_matrix *matrix; | |
7172 | int delta, delta_bytes, dy, dvpos; | |
7173 | { | |
7174 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
7175 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
7176 | int x = row->x; | |
7177 | int pt_old = PT - delta; | |
7178 | ||
7179 | /* Skip over glyphs not having an object at the start of the row. | |
7180 | These are special glyphs like truncation marks on terminal | |
7181 | frames. */ | |
7182 | if (row->displays_text_p) | |
7183 | while (glyph < end | |
7184 | && !glyph->object | |
7185 | && glyph->charpos < 0) | |
7186 | { | |
7187 | x += glyph->pixel_width; | |
7188 | ++glyph; | |
7189 | } | |
7190 | ||
7191 | while (glyph < end | |
7192 | && glyph->object | |
7193 | && (!BUFFERP (glyph->object) | |
7194 | || glyph->charpos < pt_old)) | |
7195 | { | |
7196 | x += glyph->pixel_width; | |
7197 | ++glyph; | |
7198 | } | |
7199 | ||
7200 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
7201 | w->cursor.x = x; | |
7202 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
7203 | w->cursor.y = row->y + dy; | |
7204 | ||
7205 | if (w == XWINDOW (selected_window)) | |
7206 | { | |
7207 | if (!row->continued_p | |
7208 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
7209 | && row->x == 0) | |
7210 | { | |
7211 | this_line_buffer = XBUFFER (w->buffer); | |
7212 | ||
7213 | CHARPOS (this_line_start_pos) | |
7214 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
7215 | BYTEPOS (this_line_start_pos) | |
7216 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
7217 | ||
7218 | CHARPOS (this_line_end_pos) | |
7219 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
7220 | BYTEPOS (this_line_end_pos) | |
7221 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
7222 | ||
7223 | this_line_y = w->cursor.y; | |
7224 | this_line_pixel_height = row->height; | |
7225 | this_line_vpos = w->cursor.vpos; | |
7226 | this_line_start_x = row->x; | |
7227 | } | |
7228 | else | |
7229 | CHARPOS (this_line_start_pos) = 0; | |
7230 | } | |
7231 | } | |
7232 | ||
7233 | ||
7234 | /* Run window scroll functions, if any, for WINDOW with new window | |
7235 | start STARTP. Sets the window start of WINDOW to that position. */ | |
7236 | ||
7237 | static INLINE struct text_pos | |
7238 | run_window_scroll_functions (window, startp) | |
7239 | Lisp_Object window; | |
7240 | struct text_pos startp; | |
7241 | { | |
7242 | struct window *w = XWINDOW (window); | |
7243 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
90adcf20 | 7244 | |
5f5c8ee5 GM |
7245 | if (!NILP (Vwindow_scroll_functions)) |
7246 | { | |
7247 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
7248 | make_number (CHARPOS (startp))); | |
7249 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
7250 | } | |
90adcf20 | 7251 | |
5f5c8ee5 GM |
7252 | return startp; |
7253 | } | |
7254 | ||
7255 | ||
7256 | /* Modify the desired matrix of window W and W->vscroll so that the | |
7257 | line containing the cursor is fully visible. */ | |
7258 | ||
7259 | static void | |
7260 | make_cursor_line_fully_visible (w) | |
7261 | struct window *w; | |
7262 | { | |
7263 | struct glyph_matrix *matrix; | |
7264 | struct glyph_row *row; | |
7265 | int top_line_height; | |
7266 | ||
7267 | /* It's not always possible to find the cursor, e.g, when a window | |
7268 | is full of overlay strings. Don't do anything in that case. */ | |
7269 | if (w->cursor.vpos < 0) | |
7270 | return; | |
7271 | ||
7272 | matrix = w->desired_matrix; | |
7273 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
7274 | ||
7275 | /* If row->y == top y of window display area, the window isn't tall | |
7276 | enough to display a single line. There is nothing we can do | |
7277 | about it. */ | |
7278 | top_line_height = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
7279 | if (row->y == top_line_height) | |
7280 | return; | |
7281 | ||
7282 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
7283 | { | |
7284 | int dy = row->height - row->visible_height; | |
7285 | w->vscroll = 0; | |
7286 | w->cursor.y += dy; | |
7287 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7288 | } | |
7289 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) | |
7290 | { | |
7291 | int dy = - (row->height - row->visible_height); | |
7292 | w->vscroll = dy; | |
7293 | w->cursor.y += dy; | |
7294 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7295 | } | |
7296 | ||
7297 | /* When we change the cursor y-position of the selected window, | |
7298 | change this_line_y as well so that the display optimization for | |
7299 | the cursor line of the selected window in redisplay_internal uses | |
7300 | the correct y-position. */ | |
7301 | if (w == XWINDOW (selected_window)) | |
7302 | this_line_y = w->cursor.y; | |
7303 | } | |
7304 | ||
7305 | ||
7306 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
7307 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
7308 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
7309 | in redisplay_window to bring a partially visible line into view in | |
7310 | the case that only the cursor has moved. | |
7311 | ||
7312 | Value is | |
7313 | ||
7314 | 1 if scrolling succeeded | |
7315 | ||
7316 | 0 if scrolling didn't find point. | |
7317 | ||
7318 | -1 if new fonts have been loaded so that we must interrupt | |
7319 | redisplay, adjust glyph matrices, and try again. */ | |
7320 | ||
7321 | static int | |
7322 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
7323 | scroll_step, temp_scroll_step) | |
7324 | Lisp_Object window; | |
7325 | int just_this_one_p; | |
7326 | int scroll_conservatively, scroll_step; | |
7327 | int temp_scroll_step; | |
7328 | { | |
7329 | struct window *w = XWINDOW (window); | |
7330 | struct frame *f = XFRAME (w->frame); | |
7331 | struct text_pos scroll_margin_pos; | |
7332 | struct text_pos pos; | |
7333 | struct text_pos startp; | |
7334 | struct it it; | |
7335 | Lisp_Object window_end; | |
7336 | int this_scroll_margin; | |
7337 | int dy = 0; | |
7338 | int scroll_max; | |
7339 | int line_height, rc; | |
7340 | int amount_to_scroll = 0; | |
7341 | Lisp_Object aggressive; | |
7342 | int height; | |
7343 | ||
7344 | #if GLYPH_DEBUG | |
7345 | debug_method_add (w, "try_scrolling"); | |
78614721 | 7346 | #endif |
5f5c8ee5 GM |
7347 | |
7348 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
7349 | ||
7350 | /* Compute scroll margin height in pixels. We scroll when point is | |
7351 | within this distance from the top or bottom of the window. */ | |
7352 | if (scroll_margin > 0) | |
90adcf20 | 7353 | { |
5f5c8ee5 GM |
7354 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
7355 | this_scroll_margin *= CANON_Y_UNIT (f); | |
7356 | } | |
7357 | else | |
7358 | this_scroll_margin = 0; | |
7359 | ||
7360 | /* Compute how much we should try to scroll maximally to bring point | |
7361 | into view. */ | |
7362 | if (scroll_step) | |
7363 | scroll_max = scroll_step; | |
7364 | else if (scroll_conservatively) | |
7365 | scroll_max = scroll_conservatively; | |
7366 | else if (temp_scroll_step) | |
7367 | scroll_max = temp_scroll_step; | |
7368 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
7369 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
7370 | /* We're trying to scroll because of aggressive scrolling | |
7371 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
7372 | there should be a variable for this. */ | |
7373 | scroll_max = 10; | |
7374 | else | |
7375 | scroll_max = 0; | |
7376 | scroll_max *= CANON_Y_UNIT (f); | |
7377 | ||
7378 | /* Decide whether we have to scroll down. Start at the window end | |
7379 | and move this_scroll_margin up to find the position of the scroll | |
7380 | margin. */ | |
7381 | window_end = Fwindow_end (window, Qt); | |
7382 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
7383 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
7384 | if (this_scroll_margin) | |
7385 | { | |
7386 | start_display (&it, w, scroll_margin_pos); | |
7387 | move_it_vertically (&it, - this_scroll_margin); | |
7388 | scroll_margin_pos = it.current.pos; | |
7389 | } | |
7390 | ||
7391 | if (PT >= CHARPOS (scroll_margin_pos)) | |
7392 | { | |
7393 | int y0; | |
7394 | ||
7395 | /* Point is in the scroll margin at the bottom of the window, or | |
7396 | below. Compute a new window start that makes point visible. */ | |
7397 | ||
7398 | /* Compute the distance from the scroll margin to PT. | |
7399 | Give up if the distance is greater than scroll_max. */ | |
7400 | start_display (&it, w, scroll_margin_pos); | |
7401 | y0 = it.current_y; | |
7402 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
7403 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
7404 | line_height = (it.max_ascent + it.max_descent | |
7405 | ? it.max_ascent + it.max_descent | |
7406 | : last_height); | |
7407 | dy = it.current_y + line_height - y0; | |
7408 | if (dy > scroll_max) | |
7409 | return 0; | |
7410 | ||
7411 | /* Move the window start down. If scrolling conservatively, | |
7412 | move it just enough down to make point visible. If | |
7413 | scroll_step is set, move it down by scroll_step. */ | |
7414 | start_display (&it, w, startp); | |
7415 | ||
7416 | if (scroll_conservatively) | |
7417 | amount_to_scroll = dy; | |
7418 | else if (scroll_step || temp_scroll_step) | |
7419 | amount_to_scroll = scroll_max; | |
7420 | else | |
90adcf20 | 7421 | { |
5f5c8ee5 GM |
7422 | aggressive = current_buffer->scroll_down_aggressively; |
7423 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
7424 | - WINDOW_DISPLAY_TOP_LINE_HEIGHT (w)); | |
7425 | if (NUMBERP (aggressive)) | |
7426 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
7427 | } | |
a2725ab2 | 7428 | |
5f5c8ee5 GM |
7429 | if (amount_to_scroll <= 0) |
7430 | return 0; | |
a2725ab2 | 7431 | |
5f5c8ee5 GM |
7432 | move_it_vertically (&it, amount_to_scroll); |
7433 | startp = it.current.pos; | |
7434 | } | |
7435 | else | |
7436 | { | |
7437 | /* See if point is inside the scroll margin at the top of the | |
7438 | window. */ | |
7439 | scroll_margin_pos = startp; | |
7440 | if (this_scroll_margin) | |
7441 | { | |
7442 | start_display (&it, w, startp); | |
7443 | move_it_vertically (&it, this_scroll_margin); | |
7444 | scroll_margin_pos = it.current.pos; | |
7445 | } | |
7446 | ||
7447 | if (PT < CHARPOS (scroll_margin_pos)) | |
7448 | { | |
7449 | /* Point is in the scroll margin at the top of the window or | |
7450 | above what is displayed in the window. */ | |
7451 | int y0; | |
7452 | ||
7453 | /* Compute the vertical distance from PT to the scroll | |
7454 | margin position. Give up if distance is greater than | |
7455 | scroll_max. */ | |
7456 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
7457 | start_display (&it, w, pos); | |
7458 | y0 = it.current_y; | |
7459 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
7460 | it.last_visible_y, -1, | |
7461 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
7462 | dy = it.current_y - y0; | |
7463 | if (dy > scroll_max) | |
7464 | return 0; | |
7465 | ||
7466 | /* Compute new window start. */ | |
7467 | start_display (&it, w, startp); | |
7468 | ||
7469 | if (scroll_conservatively) | |
7470 | amount_to_scroll = dy; | |
7471 | else if (scroll_step || temp_scroll_step) | |
7472 | amount_to_scroll = scroll_max; | |
538f13d4 | 7473 | else |
5f5c8ee5 GM |
7474 | { |
7475 | aggressive = current_buffer->scroll_up_aggressively; | |
7476 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
7477 | - WINDOW_DISPLAY_TOP_LINE_HEIGHT (w)); | |
7478 | if (NUMBERP (aggressive)) | |
7479 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
7480 | } | |
a2725ab2 | 7481 | |
5f5c8ee5 GM |
7482 | if (amount_to_scroll <= 0) |
7483 | return 0; | |
7484 | ||
7485 | move_it_vertically (&it, - amount_to_scroll); | |
7486 | startp = it.current.pos; | |
90adcf20 RS |
7487 | } |
7488 | } | |
a2889657 | 7489 | |
5f5c8ee5 GM |
7490 | /* Run window scroll functions. */ |
7491 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 7492 | |
5f5c8ee5 GM |
7493 | /* Display the window. Give up if new fonts are loaded, or if point |
7494 | doesn't appear. */ | |
7495 | if (!try_window (window, startp)) | |
7496 | rc = -1; | |
7497 | else if (w->cursor.vpos < 0) | |
7498 | { | |
7499 | clear_glyph_matrix (w->desired_matrix); | |
7500 | rc = 0; | |
7501 | } | |
7502 | else | |
7503 | { | |
7504 | /* Maybe forget recorded base line for line number display. */ | |
7505 | if (!just_this_one_p | |
7506 | || current_buffer->clip_changed | |
7507 | || beg_unchanged < CHARPOS (startp)) | |
7508 | w->base_line_number = Qnil; | |
7509 | ||
7510 | /* If cursor ends up on a partially visible line, shift display | |
7511 | lines up or down. */ | |
7512 | make_cursor_line_fully_visible (w); | |
7513 | rc = 1; | |
7514 | } | |
7515 | ||
7516 | return rc; | |
a2889657 JB |
7517 | } |
7518 | ||
5f5c8ee5 GM |
7519 | |
7520 | /* Compute a suitable window start for window W if display of W starts | |
7521 | on a continuation line. Value is non-zero if a new window start | |
7522 | was computed. | |
7523 | ||
7524 | The new window start will be computed, based on W's width, starting | |
7525 | from the start of the continued line. It is the start of the | |
7526 | screen line with the minimum distance from the old start W->start. */ | |
7527 | ||
7528 | static int | |
7529 | compute_window_start_on_continuation_line (w) | |
7530 | struct window *w; | |
1f1ff51d | 7531 | { |
5f5c8ee5 GM |
7532 | struct text_pos pos, start_pos; |
7533 | int window_start_changed_p = 0; | |
1f1ff51d | 7534 | |
5f5c8ee5 | 7535 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 7536 | |
5f5c8ee5 GM |
7537 | /* If window start is on a continuation line... Window start may be |
7538 | < BEGV in case there's invisible text at the start of the | |
7539 | buffer (M-x rmail, for example). */ | |
7540 | if (CHARPOS (start_pos) > BEGV | |
7541 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 7542 | { |
5f5c8ee5 GM |
7543 | struct it it; |
7544 | struct glyph_row *row; | |
7545 | ||
7546 | /* Find the start of the continued line. This should be fast | |
7547 | because scan_buffer is fast (newline cache). */ | |
7548 | row = w->desired_matrix->rows + (WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0); | |
7549 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), | |
7550 | row, DEFAULT_FACE_ID); | |
7551 | reseat_at_previous_visible_line_start (&it); | |
7552 | ||
7553 | /* If the line start is "too far" away from the window start, | |
7554 | say it takes too much time to compute a new window start. */ | |
7555 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
7556 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
7557 | { | |
7558 | int min_distance, distance; | |
7559 | ||
7560 | /* Move forward by display lines to find the new window | |
7561 | start. If window width was enlarged, the new start can | |
7562 | be expected to be > the old start. If window width was | |
7563 | decreased, the new window start will be < the old start. | |
7564 | So, we're looking for the display line start with the | |
7565 | minimum distance from the old window start. */ | |
7566 | pos = it.current.pos; | |
7567 | min_distance = INFINITY; | |
7568 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
7569 | distance < min_distance) | |
7570 | { | |
7571 | min_distance = distance; | |
7572 | pos = it.current.pos; | |
7573 | move_it_by_lines (&it, 1, 0); | |
7574 | } | |
7575 | ||
7576 | /* Set the window start there. */ | |
7577 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
7578 | window_start_changed_p = 1; | |
7579 | } | |
1f1ff51d | 7580 | } |
5f5c8ee5 GM |
7581 | |
7582 | return window_start_changed_p; | |
1f1ff51d KH |
7583 | } |
7584 | ||
5f5c8ee5 GM |
7585 | |
7586 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only | |
7587 | selected_window is redisplayed. */ | |
90adcf20 | 7588 | |
a2889657 | 7589 | static void |
5f5c8ee5 | 7590 | redisplay_window (window, just_this_one_p) |
a2889657 | 7591 | Lisp_Object window; |
5f5c8ee5 | 7592 | int just_this_one_p; |
a2889657 | 7593 | { |
5f5c8ee5 GM |
7594 | struct window *w = XWINDOW (window); |
7595 | struct frame *f = XFRAME (w->frame); | |
7596 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 7597 | struct buffer *old = current_buffer; |
5f5c8ee5 | 7598 | struct text_pos lpoint, opoint, startp; |
e481f960 | 7599 | int update_mode_line; |
5f5c8ee5 GM |
7600 | int tem; |
7601 | struct it it; | |
7602 | /* Record it now because it's overwritten. */ | |
7603 | int current_matrix_up_to_date_p = 0; | |
5ba50c51 | 7604 | int really_switched_buffer = 0; |
5f5c8ee5 | 7605 | int temp_scroll_step = 0; |
2e54982e | 7606 | int count = specpdl_ptr - specpdl; |
a2889657 | 7607 | |
5f5c8ee5 GM |
7608 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
7609 | opoint = lpoint; | |
a2889657 | 7610 | |
5f5c8ee5 GM |
7611 | /* W must be a leaf window here. */ |
7612 | xassert (!NILP (w->buffer)); | |
7613 | #if GLYPH_DEBUG | |
7614 | *w->desired_matrix->method = 0; | |
7615 | #endif | |
2e54982e RS |
7616 | |
7617 | specbind (Qinhibit_point_motion_hooks, Qt); | |
5f5c8ee5 GM |
7618 | |
7619 | /* Has the mode line to be updated? */ | |
7620 | update_mode_line = (!NILP (w->update_mode_line) | |
7621 | || update_mode_lines | |
7622 | || buffer->clip_changed); | |
8de2d90b JB |
7623 | |
7624 | if (MINI_WINDOW_P (w)) | |
7625 | { | |
5f5c8ee5 GM |
7626 | if (w == XWINDOW (echo_area_window) |
7627 | && (echo_area_glyphs | |
7628 | || STRINGP (echo_area_message))) | |
7629 | { | |
7630 | if (update_mode_line) | |
7631 | /* We may have to update a tty frame's menu bar or a | |
7632 | toolbar. Example `M-x C-h C-h C-g'. */ | |
7633 | goto finish_menu_bars; | |
7634 | else | |
7635 | /* We've already displayed the echo area glyphs in this window. */ | |
7636 | goto finish_scroll_bars; | |
7637 | } | |
73af359d | 7638 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 7639 | { |
5f5c8ee5 GM |
7640 | /* W is a mini-buffer window, but it's not the currently |
7641 | active one, so clear it. */ | |
7642 | int yb = window_text_bottom_y (w); | |
7643 | struct glyph_row *row; | |
7644 | int y; | |
7645 | ||
7646 | for (y = 0, row = w->desired_matrix->rows; | |
7647 | y < yb; | |
7648 | y += row->height, ++row) | |
7649 | blank_row (w, row, y); | |
88f22aff | 7650 | goto finish_scroll_bars; |
8de2d90b JB |
7651 | } |
7652 | } | |
a2889657 | 7653 | |
5f5c8ee5 GM |
7654 | /* Otherwise set up data on this window; select its buffer and point |
7655 | value. */ | |
e481f960 | 7656 | if (update_mode_line) |
5ba50c51 | 7657 | { |
5f5c8ee5 GM |
7658 | /* Really select the buffer, for the sake of buffer-local |
7659 | variables. */ | |
5ba50c51 RS |
7660 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
7661 | really_switched_buffer = 1; | |
7662 | } | |
e481f960 RS |
7663 | else |
7664 | set_buffer_temp (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
7665 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
7666 | ||
7667 | current_matrix_up_to_date_p | |
7668 | = (!NILP (w->window_end_valid) | |
7669 | && !current_buffer->clip_changed | |
7670 | && XFASTINT (w->last_modified) >= MODIFF | |
7671 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 7672 | |
5f5c8ee5 GM |
7673 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
7674 | the window end being valid, so set it to nil there. */ | |
7675 | if (windows_or_buffers_changed) | |
7676 | { | |
7677 | /* If window starts on a continuation line, maybe adjust the | |
7678 | window start in case the window's width changed. */ | |
7679 | if (XMARKER (w->start)->buffer == current_buffer) | |
7680 | compute_window_start_on_continuation_line (w); | |
7681 | ||
7682 | w->window_end_valid = Qnil; | |
7683 | } | |
12adba34 | 7684 | |
5f5c8ee5 GM |
7685 | /* Some sanity checks. */ |
7686 | CHECK_WINDOW_END (w); | |
7687 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 7688 | abort (); |
5f5c8ee5 | 7689 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 7690 | abort (); |
a2889657 | 7691 | |
28995e67 RS |
7692 | /* If %c is in mode line, update it if needed. */ |
7693 | if (!NILP (w->column_number_displayed) | |
7694 | /* This alternative quickly identifies a common case | |
7695 | where no change is needed. */ | |
7696 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7697 | && XFASTINT (w->last_modified) >= MODIFF |
7698 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7699 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7700 | update_mode_line = 1; | |
7701 | ||
5f5c8ee5 GM |
7702 | /* Count number of windows showing the selected buffer. An indirect |
7703 | buffer counts as its base buffer. */ | |
7704 | if (!just_this_one_p) | |
42640f83 RS |
7705 | { |
7706 | struct buffer *current_base, *window_base; | |
7707 | current_base = current_buffer; | |
7708 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
7709 | if (current_base->base_buffer) | |
7710 | current_base = current_base->base_buffer; | |
7711 | if (window_base->base_buffer) | |
7712 | window_base = window_base->base_buffer; | |
7713 | if (current_base == window_base) | |
7714 | buffer_shared++; | |
7715 | } | |
a2889657 | 7716 | |
5f5c8ee5 GM |
7717 | /* Point refers normally to the selected window. For any other |
7718 | window, set up appropriate value. */ | |
a2889657 JB |
7719 | if (!EQ (window, selected_window)) |
7720 | { | |
12adba34 RS |
7721 | int new_pt = XMARKER (w->pointm)->charpos; |
7722 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 7723 | if (new_pt < BEGV) |
a2889657 | 7724 | { |
f67a0f51 | 7725 | new_pt = BEGV; |
12adba34 RS |
7726 | new_pt_byte = BEGV_BYTE; |
7727 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 7728 | } |
f67a0f51 | 7729 | else if (new_pt > (ZV - 1)) |
a2889657 | 7730 | { |
f67a0f51 | 7731 | new_pt = ZV; |
12adba34 RS |
7732 | new_pt_byte = ZV_BYTE; |
7733 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 7734 | } |
5f5c8ee5 | 7735 | |
f67a0f51 | 7736 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 7737 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
7738 | } |
7739 | ||
f4faa47c | 7740 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
7741 | have changed, invalidate the width run cache. It's true that |
7742 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
7743 | redisplay goes (non-fatally) haywire when the display table is |
7744 | changed, so why should we worry about doing any better? */ | |
7745 | if (current_buffer->width_run_cache) | |
7746 | { | |
f908610f | 7747 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
7748 | |
7749 | if (! disptab_matches_widthtab (disptab, | |
7750 | XVECTOR (current_buffer->width_table))) | |
7751 | { | |
7752 | invalidate_region_cache (current_buffer, | |
7753 | current_buffer->width_run_cache, | |
7754 | BEG, Z); | |
7755 | recompute_width_table (current_buffer, disptab); | |
7756 | } | |
7757 | } | |
7758 | ||
a2889657 | 7759 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
7760 | if (XMARKER (w->start)->buffer != current_buffer) |
7761 | goto recenter; | |
7762 | ||
5f5c8ee5 | 7763 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 7764 | |
cf0df6ab RS |
7765 | /* If someone specified a new starting point but did not insist, |
7766 | check whether it can be used. */ | |
5f5c8ee5 | 7767 | if (!NILP (w->optional_new_start)) |
cf0df6ab RS |
7768 | { |
7769 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
7770 | /* This takes a mini-buffer prompt into account. */ |
7771 | start_display (&it, w, startp); | |
7772 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
7773 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
7774 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
7775 | w->force_start = Qt; |
7776 | } | |
7777 | ||
8de2d90b | 7778 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 7779 | unless the specified location is outside the accessible range. */ |
265a9e55 | 7780 | if (!NILP (w->force_start)) |
a2889657 | 7781 | { |
e63574d7 | 7782 | w->force_start = Qnil; |
5f5c8ee5 | 7783 | w->vscroll = 0; |
b5174a51 | 7784 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
7785 | |
7786 | /* Forget any recorded base line for line number display. */ | |
7787 | if (!current_matrix_up_to_date_p | |
7788 | || current_buffer->clip_changed) | |
7789 | w->base_line_number = Qnil; | |
7790 | ||
75c43375 RS |
7791 | /* Redisplay the mode line. Select the buffer properly for that. |
7792 | Also, run the hook window-scroll-functions | |
7793 | because we have scrolled. */ | |
e63574d7 RS |
7794 | /* Note, we do this after clearing force_start because |
7795 | if there's an error, it is better to forget about force_start | |
7796 | than to get into an infinite loop calling the hook functions | |
7797 | and having them get more errors. */ | |
75c43375 RS |
7798 | if (!update_mode_line |
7799 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 7800 | { |
5ba50c51 RS |
7801 | if (!really_switched_buffer) |
7802 | { | |
7803 | set_buffer_temp (old); | |
7804 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 7805 | really_switched_buffer = 1; |
5ba50c51 | 7806 | } |
5f5c8ee5 | 7807 | |
e481f960 RS |
7808 | update_mode_line = 1; |
7809 | w->update_mode_line = Qt; | |
5f5c8ee5 | 7810 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 7811 | } |
5f5c8ee5 | 7812 | |
c2213350 | 7813 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 7814 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
7815 | if (CHARPOS (startp) < BEGV) |
7816 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
7817 | else if (CHARPOS (startp) > ZV) | |
7818 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
7819 | ||
7820 | /* Redisplay, then check if cursor has been set during the | |
7821 | redisplay. Give up if new fonts were loaded. */ | |
7822 | if (!try_window (window, startp)) | |
7823 | { | |
7824 | w->force_start = Qt; | |
7825 | clear_glyph_matrix (w->desired_matrix); | |
7826 | goto restore_buffers; | |
7827 | } | |
7828 | ||
7829 | if (w->cursor.vpos < 0) | |
7830 | { | |
7831 | /* If point does not appear, or on a line that is not fully | |
7832 | visible, move point so it does appear. The desired | |
7833 | matrix has been built above, so we can use it. */ | |
7834 | int height = window_box_height (w) / 2; | |
7835 | struct glyph_row *row = MATRIX_ROW (w->desired_matrix, 0); | |
7836 | ||
7837 | while (row->y < height) | |
7838 | ++row; | |
7839 | ||
7840 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
7841 | MATRIX_ROW_START_BYTEPOS (row)); | |
7842 | ||
90adcf20 | 7843 | if (w != XWINDOW (selected_window)) |
12adba34 | 7844 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
7845 | else if (current_buffer == old) |
7846 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
7847 | ||
7848 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
7849 | ||
7850 | /* If we are highlighting the region, then we just changed | |
7851 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
7852 | if (!NILP (Vtransient_mark_mode) |
7853 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 7854 | { |
5f5c8ee5 GM |
7855 | clear_glyph_matrix (w->desired_matrix); |
7856 | if (!try_window (window, startp)) | |
7857 | goto restore_buffers; | |
6f27fa9b | 7858 | } |
a2889657 | 7859 | } |
5f5c8ee5 GM |
7860 | |
7861 | make_cursor_line_fully_visible (w); | |
7862 | #if GLYPH_DEBUG | |
7863 | debug_method_add (w, "forced window start"); | |
7864 | #endif | |
a2889657 JB |
7865 | goto done; |
7866 | } | |
7867 | ||
5f5c8ee5 GM |
7868 | /* Handle case where text has not changed, only point, and it has |
7869 | not moved off the frame. */ | |
7870 | if (current_matrix_up_to_date_p | |
7871 | /* Point may be in this window. */ | |
7872 | && PT >= CHARPOS (startp) | |
7873 | /* If we don't check this, we are called to move the cursor in a | |
7874 | horizontally split window with a current matrix that doesn't | |
7875 | fit the display. */ | |
7876 | && !windows_or_buffers_changed | |
7877 | /* Selective display hasn't changed. */ | |
7878 | && !current_buffer->clip_changed | |
b1aa6cb3 RS |
7879 | /* If force-mode-line-update was called, really redisplay; |
7880 | that's how redisplay is forced after e.g. changing | |
7881 | buffer-invisibility-spec. */ | |
632ab665 | 7882 | && NILP (w->update_mode_line) |
5f5c8ee5 GM |
7883 | /* Can't use this case if highlighting a region. When a |
7884 | region exists, cursor movement has to do more than just | |
7885 | set the cursor. */ | |
7886 | && !(!NILP (Vtransient_mark_mode) | |
7887 | && !NILP (current_buffer->mark_active)) | |
bd66d1ba | 7888 | && NILP (w->region_showing) |
5f5c8ee5 GM |
7889 | /* Right after splitting windows, last_point may be nil. */ |
7890 | && INTEGERP (w->last_point) | |
7891 | /* This code is not used for mini-buffer for the sake of the case | |
7892 | of redisplaying to replace an echo area message; since in | |
7893 | that case the mini-buffer contents per se are usually | |
7894 | unchanged. This code is of no real use in the mini-buffer | |
7895 | since the handling of this_line_start_pos, etc., in redisplay | |
7896 | handles the same cases. */ | |
d45de95b | 7897 | && !EQ (window, minibuf_window) |
5f5c8ee5 GM |
7898 | /* When splitting windows or for new windows, it happens that |
7899 | redisplay is called with a nil window_end_vpos or one being | |
7900 | larger than the window. This should really be fixed in | |
7901 | window.c. I don't have this on my list, now, so we do | |
7902 | approximately the same as the old redisplay code. --gerd. */ | |
7903 | && INTEGERP (w->window_end_vpos) | |
7904 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
7905 | && (FRAME_WINDOW_P (f) | |
7906 | || !MARKERP (Voverlay_arrow_position) | |
377dbd97 | 7907 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) |
a2889657 | 7908 | { |
5f5c8ee5 GM |
7909 | int this_scroll_margin; |
7910 | struct glyph_row *row; | |
7911 | int scroll_p; | |
a2889657 | 7912 | |
5f5c8ee5 GM |
7913 | #if GLYPH_DEBUG |
7914 | debug_method_add (w, "cursor movement"); | |
7915 | #endif | |
9afd2168 | 7916 | |
5f5c8ee5 GM |
7917 | /* Scroll if point within this distance from the top or bottom |
7918 | of the window. This is a pixel value. */ | |
7919 | this_scroll_margin = max (0, scroll_margin); | |
7920 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
7921 | this_scroll_margin *= CANON_Y_UNIT (f); | |
7922 | ||
7923 | /* Start with the row the cursor was displayed during the last | |
7924 | not paused redisplay. Give up if that row is not valid. */ | |
7925 | if (w->last_cursor.vpos >= w->current_matrix->nrows) | |
7926 | goto try_to_scroll; | |
7927 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
7928 | if (row->mode_line_p) | |
7929 | ++row; | |
7930 | if (!row->enabled_p) | |
7931 | goto try_to_scroll; | |
7932 | ||
7933 | scroll_p = 0; | |
7934 | if (PT > XFASTINT (w->last_point)) | |
7935 | { | |
7936 | /* Point has moved forward. */ | |
7937 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
7938 | ||
7939 | while ((MATRIX_ROW_END_CHARPOS (row) < PT | |
7940 | /* The end position of a row equals the start | |
7941 | position of the next row. If PT is there, we | |
7942 | would rather display it in the next line, except | |
7943 | when this line ends in ZV. */ | |
7944 | || (MATRIX_ROW_END_CHARPOS (row) == PT | |
7945 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
7946 | || !row->ends_at_zv_p))) | |
7947 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
7948 | { | |
7949 | xassert (row->enabled_p); | |
7950 | ++row; | |
7951 | } | |
9afd2168 | 7952 | |
5f5c8ee5 GM |
7953 | /* If within the scroll margin, scroll. Note that |
7954 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which the | |
7955 | next line would be drawn, and that this_scroll_margin can | |
7956 | be zero. */ | |
7957 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
7958 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
7959 | /* Line is completely visible last line in window and PT | |
7960 | is to be set in the next line. */ | |
7961 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
7962 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
7963 | && !row->ends_at_zv_p | |
7964 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
7965 | scroll_p = 1; | |
7966 | } | |
7967 | else if (PT < XFASTINT (w->last_point)) | |
a2889657 | 7968 | { |
5f5c8ee5 GM |
7969 | /* Cursor has to be moved backward. Note that PT >= |
7970 | CHARPOS (startp) because of the outer if-statement. */ | |
7971 | while (!row->mode_line_p | |
7972 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
7973 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
7974 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
7975 | && (row->y > this_scroll_margin | |
7976 | || CHARPOS (startp) == BEGV)) | |
a2889657 | 7977 | { |
5f5c8ee5 GM |
7978 | xassert (row->enabled_p); |
7979 | --row; | |
a2889657 | 7980 | } |
abb4c08f | 7981 | |
5f5c8ee5 GM |
7982 | /* Consider the following case: Window starts at BEGV, there |
7983 | is invisible, intangible text at BEGV, so that display | |
7984 | starts at some point START > BEGV. It can happen that | |
7985 | we are called with PT somewhere between BEGV and START. | |
7986 | Try to handle that case. */ | |
7987 | if (row < w->current_matrix->rows | |
7988 | || row->mode_line_p) | |
7989 | { | |
7990 | row = w->current_matrix->rows; | |
7991 | if (row->mode_line_p) | |
7992 | ++row; | |
7993 | } | |
7994 | ||
7995 | /* Due to newlines in overlay strings, we may have to skip | |
7996 | forward over overlay strings. */ | |
7997 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
7998 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
7999 | && !row->ends_at_zv_p) | |
8000 | ++row; | |
8001 | ||
8002 | /* If within the scroll margin, scroll. */ | |
8003 | if (row->y < this_scroll_margin | |
8004 | && CHARPOS (startp) != BEGV) | |
8005 | scroll_p = 1; | |
8006 | } | |
8007 | ||
8008 | /* if PT is not in the glyph row, give up. */ | |
8009 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8010 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8011 | goto try_to_scroll; | |
8012 | ||
8013 | /* If we end up in a partially visible line, let's make it fully | |
8014 | visible. This can be done most easily by using the existing | |
8015 | scrolling code. */ | |
8016 | if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8017 | { | |
8018 | temp_scroll_step = 1; | |
8019 | goto try_to_scroll; | |
a2889657 | 8020 | } |
5f5c8ee5 GM |
8021 | else if (scroll_p) |
8022 | goto try_to_scroll; | |
8023 | ||
8024 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8025 | goto done; | |
a2889657 | 8026 | } |
5f5c8ee5 | 8027 | |
a2889657 JB |
8028 | /* If current starting point was originally the beginning of a line |
8029 | but no longer is, find a new starting point. */ | |
265a9e55 | 8030 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
8031 | && !(CHARPOS (startp) <= BEGV |
8032 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 8033 | { |
5f5c8ee5 GM |
8034 | #if GLYPH_DEBUG |
8035 | debug_method_add (w, "recenter 1"); | |
8036 | #endif | |
a2889657 JB |
8037 | goto recenter; |
8038 | } | |
5f5c8ee5 GM |
8039 | |
8040 | /* Try scrolling with try_window_id. */ | |
8041 | else if (!windows_or_buffers_changed | |
8042 | /* Window must be either use window-based redisplay or | |
8043 | be full width. */ | |
8044 | && (FRAME_WINDOW_P (f) | |
8045 | || ((line_ins_del_ok && WINDOW_FULL_WIDTH_P (w)) | |
8046 | && just_this_one_p)) | |
8047 | && !MINI_WINDOW_P (w) | |
8048 | /* Point is not known NOT to appear in window. */ | |
8049 | && PT >= CHARPOS (startp) | |
a2889657 | 8050 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
8051 | /* Window is not hscrolled. */ |
8052 | && XFASTINT (w->hscroll) == 0 | |
8053 | /* Selective display has not changed. */ | |
8054 | && !current_buffer->clip_changed | |
8055 | /* Current matrix is up to date. */ | |
8056 | && !NILP (w->window_end_valid) | |
8057 | /* Can't use this case if highlighting a region because | |
8058 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
8059 | && !(!NILP (Vtransient_mark_mode) |
8060 | && !NILP (current_buffer->mark_active)) | |
8061 | && NILP (w->region_showing) | |
5f5c8ee5 | 8062 | /* Overlay arrow position and string not changed. */ |
d45de95b | 8063 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 8064 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
8065 | /* Value is > 0 if update has been done, it is -1 if we |
8066 | know that the same window start will not work. It is 0 | |
8067 | if unsuccessful for some other reason. */ | |
8068 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 8069 | { |
5f5c8ee5 GM |
8070 | #if GLYPH_DEBUG |
8071 | debug_method_add (w, "try_window_id"); | |
8072 | #endif | |
8073 | ||
8074 | if (fonts_changed_p) | |
8075 | goto restore_buffers; | |
a2889657 JB |
8076 | if (tem > 0) |
8077 | goto done; | |
5f5c8ee5 GM |
8078 | /* Otherwise try_window_id has returned -1 which means that we |
8079 | don't want the alternative below this comment to execute. */ | |
a2889657 | 8080 | } |
5f5c8ee5 GM |
8081 | else if (CHARPOS (startp) >= BEGV |
8082 | && CHARPOS (startp) <= ZV | |
8083 | && PT >= CHARPOS (startp) | |
8084 | && (CHARPOS (startp) < ZV | |
e9874cee | 8085 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 8086 | || CHARPOS (startp) == BEGV |
8850a573 RS |
8087 | || (XFASTINT (w->last_modified) >= MODIFF |
8088 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 8089 | { |
5f5c8ee5 GM |
8090 | #if GLYPH_DEBUG |
8091 | debug_method_add (w, "same window start"); | |
8092 | #endif | |
8093 | ||
8094 | /* Try to redisplay starting at same place as before. | |
8095 | If point has not moved off frame, accept the results. */ | |
8096 | if (!current_matrix_up_to_date_p | |
8097 | /* Don't use try_window_reusing_current_matrix in this case | |
8098 | because it can have changed the buffer. */ | |
8099 | || !NILP (Vwindow_scroll_functions) | |
8100 | || MINI_WINDOW_P (w) | |
8101 | || !try_window_reusing_current_matrix (w)) | |
8102 | { | |
8103 | IF_DEBUG (debug_method_add (w, "1")); | |
8104 | try_window (window, startp); | |
8105 | } | |
8106 | ||
8107 | if (fonts_changed_p) | |
8108 | goto restore_buffers; | |
8109 | ||
8110 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 8111 | { |
5f5c8ee5 GM |
8112 | if (!just_this_one_p |
8113 | || current_buffer->clip_changed | |
8114 | || beg_unchanged < CHARPOS (startp)) | |
aa6d10fa RS |
8115 | /* Forget any recorded base line for line number display. */ |
8116 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
8117 | |
8118 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
8119 | goto done; |
8120 | } | |
a2889657 | 8121 | else |
5f5c8ee5 | 8122 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
8123 | } |
8124 | ||
5f5c8ee5 GM |
8125 | try_to_scroll: |
8126 | ||
c2213350 | 8127 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8128 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 8129 | |
e481f960 RS |
8130 | /* Redisplay the mode line. Select the buffer properly for that. */ |
8131 | if (!update_mode_line) | |
8132 | { | |
5ba50c51 RS |
8133 | if (!really_switched_buffer) |
8134 | { | |
8135 | set_buffer_temp (old); | |
8136 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8137 | really_switched_buffer = 1; |
5ba50c51 | 8138 | } |
e481f960 RS |
8139 | update_mode_line = 1; |
8140 | w->update_mode_line = Qt; | |
8141 | } | |
a2889657 | 8142 | |
5f5c8ee5 GM |
8143 | /* Try to scroll by specified few lines. */ |
8144 | if ((scroll_conservatively | |
8145 | || scroll_step | |
8146 | || temp_scroll_step | |
8147 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
8148 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 8149 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
8150 | && CHARPOS (startp) >= BEGV |
8151 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 8152 | { |
5f5c8ee5 GM |
8153 | /* The function returns -1 if new fonts were loaded, 1 if |
8154 | successful, 0 if not successful. */ | |
8155 | int rc = try_scrolling (window, just_this_one_p, | |
8156 | scroll_conservatively, | |
8157 | scroll_step, | |
8158 | temp_scroll_step); | |
8159 | if (rc > 0) | |
8160 | goto done; | |
8161 | else if (rc < 0) | |
8162 | goto restore_buffers; | |
8163 | } | |
f9c8af06 | 8164 | |
5f5c8ee5 | 8165 | /* Finally, just choose place to start which centers point */ |
5936754e | 8166 | |
5f5c8ee5 | 8167 | recenter: |
44173109 | 8168 | |
5f5c8ee5 GM |
8169 | #if GLYPH_DEBUG |
8170 | debug_method_add (w, "recenter"); | |
8171 | #endif | |
0789adb2 | 8172 | |
5f5c8ee5 | 8173 | /* w->vscroll = 0; */ |
0789adb2 | 8174 | |
5f5c8ee5 GM |
8175 | /* Forget any previously recorded base line for line number display. */ |
8176 | if (!current_matrix_up_to_date_p | |
8177 | || current_buffer->clip_changed) | |
8178 | w->base_line_number = Qnil; | |
8179 | ||
8180 | /* Move backward half the height of the window. */ | |
8181 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8182 | it.current_y = it.last_visible_y; | |
8183 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
8184 | xassert (IT_CHARPOS (it) >= BEGV); | |
8185 | ||
8186 | /* The function move_it_vertically_backward may move over more | |
8187 | than the specified y-distance. If it->w is small, e.g. a | |
8188 | mini-buffer window, we may end up in front of the window's | |
8189 | display area. Start displaying at the start of the line | |
8190 | containing PT in this case. */ | |
8191 | if (it.current_y <= 0) | |
8192 | { | |
8193 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8194 | move_it_vertically (&it, 0); | |
8195 | xassert (IT_CHARPOS (it) <= PT); | |
8196 | it.current_y = 0; | |
0789adb2 RS |
8197 | } |
8198 | ||
5f5c8ee5 GM |
8199 | it.current_x = it.hpos = 0; |
8200 | ||
8201 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
8202 | in case the window-scroll-functions functions get errors. */ | |
8203 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
8204 | ||
8205 | /* Run scroll hooks. */ | |
8206 | startp = run_window_scroll_functions (window, it.current.pos); | |
8207 | ||
8208 | /* Redisplay the window. */ | |
8209 | if (!current_matrix_up_to_date_p | |
8210 | || windows_or_buffers_changed | |
8211 | /* Don't use try_window_reusing_current_matrix in this case | |
8212 | because it can have changed the buffer. */ | |
8213 | || !NILP (Vwindow_scroll_functions) | |
8214 | || !just_this_one_p | |
8215 | || MINI_WINDOW_P (w) | |
8216 | || !try_window_reusing_current_matrix (w)) | |
8217 | try_window (window, startp); | |
8218 | ||
8219 | /* If new fonts have been loaded (due to fontsets), give up. We | |
8220 | have to start a new redisplay since we need to re-adjust glyph | |
8221 | matrices. */ | |
8222 | if (fonts_changed_p) | |
8223 | goto restore_buffers; | |
8224 | ||
8225 | /* If cursor did not appear assume that the middle of the window is | |
8226 | in the first line of the window. Do it again with the next line. | |
8227 | (Imagine a window of height 100, displaying two lines of height | |
8228 | 60. Moving back 50 from it->last_visible_y will end in the first | |
8229 | line.) */ | |
8230 | if (w->cursor.vpos < 0) | |
a2889657 | 8231 | { |
5f5c8ee5 GM |
8232 | if (!NILP (w->window_end_valid) |
8233 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 8234 | { |
5f5c8ee5 GM |
8235 | clear_glyph_matrix (w->desired_matrix); |
8236 | move_it_by_lines (&it, 1, 0); | |
8237 | try_window (window, it.current.pos); | |
a2889657 | 8238 | } |
5f5c8ee5 | 8239 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 8240 | { |
5f5c8ee5 GM |
8241 | clear_glyph_matrix (w->desired_matrix); |
8242 | move_it_by_lines (&it, -1, 0); | |
8243 | try_window (window, it.current.pos); | |
8244 | } | |
8245 | else | |
8246 | { | |
8247 | /* Not much we can do about it. */ | |
a2889657 | 8248 | } |
a2889657 | 8249 | } |
010494d0 | 8250 | |
5f5c8ee5 GM |
8251 | /* Consider the following case: Window starts at BEGV, there is |
8252 | invisible, intangible text at BEGV, so that display starts at | |
8253 | some point START > BEGV. It can happen that we are called with | |
8254 | PT somewhere between BEGV and START. Try to handle that case. */ | |
8255 | if (w->cursor.vpos < 0) | |
835766b6 | 8256 | { |
5f5c8ee5 GM |
8257 | struct glyph_row *row = w->current_matrix->rows; |
8258 | if (row->mode_line_p) | |
8259 | ++row; | |
8260 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 8261 | } |
5f5c8ee5 GM |
8262 | |
8263 | make_cursor_line_fully_visible (w); | |
b5174a51 | 8264 | |
5f5c8ee5 GM |
8265 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
8266 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
8267 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
8268 | ? Qt : Qnil); | |
a2889657 | 8269 | |
5f5c8ee5 | 8270 | done: |
a2889657 | 8271 | |
5f5c8ee5 | 8272 | /* Display the mode line, if we must. */ |
e481f960 | 8273 | if ((update_mode_line |
aa6d10fa | 8274 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
8275 | if (a) the window to its side is being redone and |
8276 | (b) we do a frame-based redisplay. This is a consequence | |
8277 | of how inverted lines are drawn in frame-based redisplay. */ | |
8278 | || (!just_this_one_p | |
8279 | && !FRAME_WINDOW_P (f) | |
8280 | && !WINDOW_FULL_WIDTH_P (w)) | |
8281 | /* Line number to display. */ | |
155ef550 | 8282 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 8283 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
8284 | || (!NILP (w->column_number_displayed) |
8285 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
8286 | /* This means that the window has a mode line. */ |
8287 | && (WINDOW_WANTS_MODELINE_P (w) | |
8288 | || WINDOW_WANTS_TOP_LINE_P (w))) | |
5ba50c51 | 8289 | { |
5f5c8ee5 GM |
8290 | display_mode_lines (w); |
8291 | ||
8292 | /* If mode line height has changed, arrange for a thorough | |
8293 | immediate redisplay using the correct mode line height. */ | |
8294 | if (WINDOW_WANTS_MODELINE_P (w) | |
8295 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 8296 | { |
5f5c8ee5 GM |
8297 | fonts_changed_p = 1; |
8298 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
8299 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 8300 | } |
5f5c8ee5 GM |
8301 | |
8302 | /* If top line height has changed, arrange for a thorough | |
8303 | immediate redisplay using the correct mode line height. */ | |
8304 | if (WINDOW_WANTS_TOP_LINE_P (w) | |
8305 | && CURRENT_TOP_LINE_HEIGHT (w) != DESIRED_TOP_LINE_HEIGHT (w)) | |
8306 | { | |
8307 | fonts_changed_p = 1; | |
8308 | MATRIX_TOP_LINE_ROW (w->current_matrix)->height | |
8309 | = DESIRED_TOP_LINE_HEIGHT (w); | |
8310 | } | |
8311 | ||
8312 | if (fonts_changed_p) | |
8313 | goto restore_buffers; | |
5ba50c51 | 8314 | } |
5f5c8ee5 GM |
8315 | |
8316 | if (!line_number_displayed | |
8317 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
8318 | { |
8319 | w->base_line_pos = Qnil; | |
8320 | w->base_line_number = Qnil; | |
8321 | } | |
a2889657 | 8322 | |
5f5c8ee5 GM |
8323 | finish_menu_bars: |
8324 | ||
7ce2c095 | 8325 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 8326 | if (update_mode_line |
5f5c8ee5 GM |
8327 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
8328 | { | |
8329 | int redisplay_menu_p = 0; | |
8330 | ||
8331 | if (FRAME_WINDOW_P (f)) | |
8332 | { | |
dc937613 | 8333 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 8334 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 8335 | #else |
5f5c8ee5 | 8336 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 8337 | #endif |
5f5c8ee5 GM |
8338 | } |
8339 | else | |
8340 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
8341 | ||
8342 | if (redisplay_menu_p) | |
8343 | display_menu_bar (w); | |
8344 | ||
8345 | #ifdef HAVE_WINDOW_SYSTEM | |
8346 | if (WINDOWP (f->toolbar_window) | |
8347 | && (FRAME_TOOLBAR_LINES (f) > 0 | |
8348 | || auto_resize_toolbars_p)) | |
8349 | redisplay_toolbar (f); | |
8350 | #endif | |
8351 | } | |
7ce2c095 | 8352 | |
88f22aff | 8353 | finish_scroll_bars: |
5f5c8ee5 | 8354 | |
88f22aff | 8355 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 8356 | { |
b1d1124b | 8357 | int start, end, whole; |
30c566e4 | 8358 | |
b1d1124b | 8359 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
8360 | At some point, it would be nice to choose between scrollbars |
8361 | which reflect the whole buffer size, with special markers | |
8362 | indicating narrowing, and scrollbars which reflect only the | |
8363 | visible region. | |
8364 | ||
5f5c8ee5 | 8365 | Note that mini-buffers sometimes aren't displaying any text. */ |
b1d1124b | 8366 | if (! MINI_WINDOW_P (w) |
5f5c8ee5 GM |
8367 | || (w == XWINDOW (minibuf_window) |
8368 | && !echo_area_glyphs | |
8369 | && !STRINGP (echo_area_message))) | |
b1d1124b | 8370 | { |
8a9311d7 | 8371 | whole = ZV - BEGV; |
4d641a15 | 8372 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
8373 | /* I don't think this is guaranteed to be right. For the |
8374 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 8375 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 8376 | |
5f5c8ee5 GM |
8377 | if (end < start) |
8378 | end = start; | |
8379 | if (whole < (end - start)) | |
8380 | whole = end - start; | |
b1d1124b JB |
8381 | } |
8382 | else | |
8383 | start = end = whole = 0; | |
30c566e4 | 8384 | |
88f22aff | 8385 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 8386 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 8387 | |
5f5c8ee5 GM |
8388 | /* Note that we actually used the scroll bar attached to this |
8389 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 8390 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 8391 | } |
b1d1124b | 8392 | |
5f5c8ee5 GM |
8393 | restore_buffers: |
8394 | ||
8395 | /* Restore current_buffer and value of point in it. */ | |
8396 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
5ba50c51 | 8397 | if (really_switched_buffer) |
f72df6ac | 8398 | set_buffer_internal_1 (old); |
e481f960 RS |
8399 | else |
8400 | set_buffer_temp (old); | |
5f5c8ee5 | 8401 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
8402 | |
8403 | unbind_to (count, Qnil); | |
a2889657 | 8404 | } |
a2889657 | 8405 | |
5f5c8ee5 GM |
8406 | |
8407 | /* Build the complete desired matrix of WINDOW with a window start | |
8408 | buffer position POS. Value is non-zero if successful. It is zero | |
8409 | if fonts were loaded during redisplay which makes re-adjusting | |
8410 | glyph matrices necessary. */ | |
8411 | ||
8412 | int | |
a2889657 JB |
8413 | try_window (window, pos) |
8414 | Lisp_Object window; | |
5f5c8ee5 GM |
8415 | struct text_pos pos; |
8416 | { | |
8417 | struct window *w = XWINDOW (window); | |
8418 | struct it it; | |
8419 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 8420 | |
5f5c8ee5 GM |
8421 | /* Make POS the new window start. */ |
8422 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 8423 | |
5f5c8ee5 GM |
8424 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
8425 | w->cursor.vpos = -1; | |
a2889657 | 8426 | overlay_arrow_seen = 0; |
642eefc6 | 8427 | |
5f5c8ee5 GM |
8428 | /* Initialize iterator and info to start at POS. */ |
8429 | start_display (&it, w, pos); | |
a2889657 | 8430 | |
5f5c8ee5 GM |
8431 | /* Display all lines of W. */ |
8432 | while (it.current_y < it.last_visible_y) | |
8433 | { | |
8434 | if (display_line (&it)) | |
8435 | last_text_row = it.glyph_row - 1; | |
8436 | if (fonts_changed_p) | |
8437 | return 0; | |
8438 | } | |
a2889657 | 8439 | |
5f5c8ee5 GM |
8440 | /* If bottom moved off end of frame, change mode line percentage. */ |
8441 | if (XFASTINT (w->window_end_pos) <= 0 | |
8442 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
8443 | w->update_mode_line = Qt; |
8444 | ||
5f5c8ee5 GM |
8445 | /* Set window_end_pos to the offset of the last character displayed |
8446 | on the window from the end of current_buffer. Set | |
8447 | window_end_vpos to its row number. */ | |
8448 | if (last_text_row) | |
8449 | { | |
8450 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
8451 | w->window_end_bytepos | |
8452 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
8453 | XSETFASTINT (w->window_end_pos, | |
8454 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
8455 | XSETFASTINT (w->window_end_vpos, | |
8456 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
8457 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
8458 | ->displays_text_p); | |
8459 | } | |
8460 | else | |
8461 | { | |
8462 | w->window_end_bytepos = 0; | |
8463 | XSETFASTINT (w->window_end_pos, 0); | |
8464 | XSETFASTINT (w->window_end_vpos, 0); | |
8465 | } | |
8466 | ||
a2889657 JB |
8467 | /* But that is not valid info until redisplay finishes. */ |
8468 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 8469 | return 1; |
a2889657 | 8470 | } |
5f5c8ee5 GM |
8471 | |
8472 | ||
a2889657 | 8473 | \f |
5f5c8ee5 GM |
8474 | /************************************************************************ |
8475 | Window redisplay reusing current matrix when buffer has not changed | |
8476 | ************************************************************************/ | |
8477 | ||
8478 | /* Try redisplay of window W showing an unchanged buffer with a | |
8479 | different window start than the last time it was displayed by | |
8480 | reusing its current matrix. Value is non-zero if successful. | |
8481 | W->start is the new window start. */ | |
a2889657 JB |
8482 | |
8483 | static int | |
5f5c8ee5 GM |
8484 | try_window_reusing_current_matrix (w) |
8485 | struct window *w; | |
a2889657 | 8486 | { |
5f5c8ee5 GM |
8487 | struct frame *f = XFRAME (w->frame); |
8488 | struct glyph_row *row, *bottom_row; | |
8489 | struct it it; | |
8490 | struct run run; | |
8491 | struct text_pos start, new_start; | |
8492 | int nrows_scrolled, i; | |
8493 | struct glyph_row *last_text_row; | |
8494 | struct glyph_row *last_reused_text_row; | |
8495 | struct glyph_row *start_row; | |
8496 | int start_vpos, min_y, max_y; | |
8497 | ||
8498 | /* Right now this function doesn't handle terminal frames. */ | |
8499 | if (!FRAME_WINDOW_P (f)) | |
8500 | return 0; | |
a2889657 | 8501 | |
5f5c8ee5 GM |
8502 | /* Can't do this if region may have changed. */ |
8503 | if ((!NILP (Vtransient_mark_mode) | |
8504 | && !NILP (current_buffer->mark_active)) | |
8505 | || !NILP (w->region_showing)) | |
8506 | return 0; | |
a2889657 | 8507 | |
5f5c8ee5 GM |
8508 | /* If top-line visibility has changed, give up. */ |
8509 | if (WINDOW_WANTS_TOP_LINE_P (w) | |
8510 | != MATRIX_TOP_LINE_ROW (w->current_matrix)->mode_line_p) | |
8511 | return 0; | |
8512 | ||
8513 | /* Give up if old or new display is scrolled vertically. We could | |
8514 | make this function handle this, but right now it doesn't. */ | |
8515 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8516 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
8517 | return 0; | |
8518 | ||
8519 | /* The variable new_start now holds the new window start. The old | |
8520 | start `start' can be determined from the current matrix. */ | |
8521 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
8522 | start = start_row->start.pos; | |
8523 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 8524 | |
5f5c8ee5 GM |
8525 | /* Clear the desired matrix for the display below. */ |
8526 | clear_glyph_matrix (w->desired_matrix); | |
8527 | ||
8528 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
8529 | { | |
8530 | int first_row_y; | |
8531 | ||
8532 | IF_DEBUG (debug_method_add (w, "twu1")); | |
8533 | ||
8534 | /* Display up to a row that can be reused. The variable | |
8535 | last_text_row is set to the last row displayed that displays | |
8536 | text. */ | |
8537 | start_display (&it, w, new_start); | |
8538 | first_row_y = it.current_y; | |
8539 | w->cursor.vpos = -1; | |
8540 | last_text_row = last_reused_text_row = NULL; | |
8541 | while (it.current_y < it.last_visible_y | |
8542 | && IT_CHARPOS (it) < CHARPOS (start) | |
8543 | && !fonts_changed_p) | |
8544 | if (display_line (&it)) | |
8545 | last_text_row = it.glyph_row - 1; | |
8546 | ||
8547 | /* A value of current_y < last_visible_y means that we stopped | |
8548 | at the previous window start, which in turn means that we | |
8549 | have at least one reusable row. */ | |
8550 | if (it.current_y < it.last_visible_y) | |
a2889657 | 8551 | { |
5f5c8ee5 GM |
8552 | nrows_scrolled = it.vpos; |
8553 | ||
8554 | /* Find PT if not already found in the lines displayed. */ | |
8555 | if (w->cursor.vpos < 0) | |
a2889657 | 8556 | { |
5f5c8ee5 GM |
8557 | int dy = it.current_y - first_row_y; |
8558 | ||
8559 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8560 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8561 | { | |
8562 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
8563 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
8564 | { | |
8565 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
8566 | dy, nrows_scrolled); | |
8567 | break; | |
8568 | } | |
8569 | ||
8570 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
8571 | break; | |
8572 | ||
8573 | ++row; | |
8574 | } | |
8575 | ||
8576 | /* Give up if point was not found. This shouldn't | |
8577 | happen often; not more often than with try_window | |
8578 | itself. */ | |
8579 | if (w->cursor.vpos < 0) | |
8580 | { | |
8581 | clear_glyph_matrix (w->desired_matrix); | |
8582 | return 0; | |
8583 | } | |
a2889657 | 8584 | } |
5f5c8ee5 GM |
8585 | |
8586 | /* Scroll the display. Do it before the current matrix is | |
8587 | changed. The problem here is that update has not yet | |
8588 | run, i.e. part of the current matrix is not up to date. | |
8589 | scroll_run_hook will clear the cursor, and use the | |
8590 | current matrix to get the height of the row the cursor is | |
8591 | in. */ | |
8592 | run.current_y = first_row_y; | |
8593 | run.desired_y = it.current_y; | |
8594 | run.height = it.last_visible_y - it.current_y; | |
8595 | if (run.height > 0) | |
a2889657 | 8596 | { |
5f5c8ee5 GM |
8597 | update_begin (f); |
8598 | rif->update_window_begin_hook (w); | |
8599 | rif->scroll_run_hook (w, &run); | |
8600 | rif->update_window_end_hook (w, 0); | |
8601 | update_end (f); | |
a2889657 | 8602 | } |
5f5c8ee5 GM |
8603 | |
8604 | /* Shift current matrix down by nrows_scrolled lines. */ | |
8605 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
8606 | rotate_matrix (w->current_matrix, | |
8607 | start_vpos, | |
8608 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
8609 | nrows_scrolled); | |
8610 | ||
8611 | /* Disable lines not reused. */ | |
8612 | for (i = 0; i < it.vpos; ++i) | |
8613 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
8614 | ||
8615 | /* Re-compute Y positions. */ | |
8616 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
8617 | min_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
8618 | max_y = it.last_visible_y; | |
8619 | while (row < bottom_row) | |
d2f84654 | 8620 | { |
5f5c8ee5 GM |
8621 | row->y = it.current_y; |
8622 | ||
8623 | if (row->y < min_y) | |
8624 | row->visible_height = row->height - (min_y - row->y); | |
8625 | else if (row->y + row->height > max_y) | |
8626 | row->visible_height | |
8627 | = row->height - (row->y + row->height - max_y); | |
8628 | else | |
8629 | row->visible_height = row->height; | |
8630 | ||
8631 | it.current_y += row->height; | |
8632 | ++it.vpos; | |
8633 | ||
8634 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8635 | last_reused_text_row = row; | |
8636 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
8637 | break; | |
8638 | ++row; | |
d2f84654 | 8639 | } |
a2889657 | 8640 | } |
5f5c8ee5 GM |
8641 | |
8642 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
8643 | reused row from the current matrix containing text, if any. | |
8644 | The value of last_text_row is the last displayed line | |
8645 | containing text. */ | |
8646 | if (last_reused_text_row) | |
a2889657 | 8647 | { |
5f5c8ee5 GM |
8648 | w->window_end_bytepos |
8649 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
8650 | XSETFASTINT (w->window_end_pos, | |
8651 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
8652 | XSETFASTINT (w->window_end_vpos, | |
8653 | MATRIX_ROW_VPOS (last_reused_text_row, | |
8654 | w->current_matrix)); | |
a2889657 | 8655 | } |
5f5c8ee5 GM |
8656 | else if (last_text_row) |
8657 | { | |
8658 | w->window_end_bytepos | |
8659 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
8660 | XSETFASTINT (w->window_end_pos, | |
8661 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
8662 | XSETFASTINT (w->window_end_vpos, | |
8663 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
8664 | } | |
8665 | else | |
8666 | { | |
8667 | /* This window must be completely empty. */ | |
8668 | w->window_end_bytepos = 0; | |
8669 | XSETFASTINT (w->window_end_pos, 0); | |
8670 | XSETFASTINT (w->window_end_vpos, 0); | |
8671 | } | |
8672 | w->window_end_valid = Qnil; | |
a2889657 | 8673 | |
5f5c8ee5 GM |
8674 | /* Update hint: don't try scrolling again in update_window. */ |
8675 | w->desired_matrix->no_scrolling_p = 1; | |
8676 | ||
8677 | #if GLYPH_DEBUG | |
8678 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
8679 | #endif | |
8680 | return 1; | |
a2889657 | 8681 | } |
5f5c8ee5 GM |
8682 | else if (CHARPOS (new_start) > CHARPOS (start)) |
8683 | { | |
8684 | struct glyph_row *pt_row, *row; | |
8685 | struct glyph_row *first_reusable_row; | |
8686 | struct glyph_row *first_row_to_display; | |
8687 | int dy; | |
8688 | int yb = window_text_bottom_y (w); | |
8689 | ||
8690 | IF_DEBUG (debug_method_add (w, "twu2")); | |
8691 | ||
8692 | /* Find the row starting at new_start, if there is one. Don't | |
8693 | reuse a partially visible line at the end. */ | |
8694 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8695 | while (first_reusable_row->enabled_p | |
8696 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
8697 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
8698 | < CHARPOS (new_start))) | |
8699 | ++first_reusable_row; | |
8700 | ||
8701 | /* Give up if there is no row to reuse. */ | |
8702 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
8703 | || !first_reusable_row->enabled_p) | |
8704 | return 0; | |
8705 | ||
8706 | /* The row we found must start at new_start, or else something | |
8707 | is broken. */ | |
8708 | xassert (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
8709 | == CHARPOS (new_start)); | |
8710 | ||
8711 | /* We can reuse fully visible rows beginning with | |
8712 | first_reusable_row to the end of the window. Set | |
8713 | first_row_to_display to the first row that cannot be reused. | |
8714 | Set pt_row to the row containing point, if there is any. */ | |
8715 | first_row_to_display = first_reusable_row; | |
8716 | pt_row = NULL; | |
8717 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
8718 | { | |
8719 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
8720 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
8721 | pt_row = first_row_to_display; | |
a2889657 | 8722 | |
5f5c8ee5 GM |
8723 | ++first_row_to_display; |
8724 | } | |
a2889657 | 8725 | |
5f5c8ee5 GM |
8726 | /* Start displaying at the start of first_row_to_display. */ |
8727 | xassert (first_row_to_display->y < yb); | |
8728 | init_to_row_start (&it, w, first_row_to_display); | |
8729 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
8730 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
8731 | - nrows_scrolled); | |
8732 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
8733 | ||
8734 | /* Display lines beginning with first_row_to_display in the | |
8735 | desired matrix. Set last_text_row to the last row displayed | |
8736 | that displays text. */ | |
8737 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
8738 | if (pt_row == NULL) | |
8739 | w->cursor.vpos = -1; | |
8740 | last_text_row = NULL; | |
8741 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
8742 | if (display_line (&it)) | |
8743 | last_text_row = it.glyph_row - 1; | |
8744 | ||
8745 | /* Give up If point isn't in a row displayed or reused. */ | |
8746 | if (w->cursor.vpos < 0) | |
8747 | { | |
8748 | clear_glyph_matrix (w->desired_matrix); | |
8749 | return 0; | |
8750 | } | |
12adba34 | 8751 | |
5f5c8ee5 GM |
8752 | /* If point is in a reused row, adjust y and vpos of the cursor |
8753 | position. */ | |
8754 | if (pt_row) | |
8755 | { | |
8756 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
8757 | w->current_matrix); | |
8758 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
8759 | } |
8760 | ||
5f5c8ee5 GM |
8761 | /* Scroll the display. */ |
8762 | run.current_y = first_reusable_row->y; | |
8763 | run.desired_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
8764 | run.height = it.last_visible_y - run.current_y; | |
8765 | if (run.height) | |
8766 | { | |
8767 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
8768 | update_begin (f); | |
8769 | rif->update_window_begin_hook (w); | |
8770 | rif->scroll_run_hook (w, &run); | |
8771 | rif->update_window_end_hook (w, 0); | |
8772 | update_end (f); | |
8773 | } | |
a2889657 | 8774 | |
5f5c8ee5 GM |
8775 | /* Adjust Y positions of reused rows. */ |
8776 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
8777 | row = first_reusable_row; | |
8778 | dy = first_reusable_row->y; | |
8779 | min_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
8780 | max_y = it.last_visible_y; | |
8781 | while (row < first_row_to_display) | |
8782 | { | |
8783 | row->y -= dy; | |
8784 | if (row->y < min_y) | |
8785 | row->visible_height = row->height - (min_y - row->y); | |
8786 | else if (row->y + row->height > max_y) | |
8787 | row->visible_height | |
8788 | = row->height - (row->y + row->height - max_y); | |
8789 | else | |
8790 | row->visible_height = row->height; | |
8791 | ++row; | |
8792 | } | |
a2889657 | 8793 | |
5f5c8ee5 GM |
8794 | /* Disable rows not reused. */ |
8795 | while (row < bottom_row) | |
8796 | { | |
8797 | row->enabled_p = 0; | |
8798 | ++row; | |
8799 | } | |
8800 | ||
8801 | /* Scroll the current matrix. */ | |
8802 | xassert (nrows_scrolled > 0); | |
8803 | rotate_matrix (w->current_matrix, | |
8804 | start_vpos, | |
8805 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
8806 | -nrows_scrolled); | |
8807 | ||
8808 | /* Adjust window end. A null value of last_text_row means that | |
8809 | the window end is in reused rows which in turn means that | |
8810 | only its vpos can have changed. */ | |
8811 | if (last_text_row) | |
8812 | { | |
8813 | w->window_end_bytepos | |
8814 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
8815 | XSETFASTINT (w->window_end_pos, | |
8816 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
8817 | XSETFASTINT (w->window_end_vpos, | |
8818 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
8819 | } | |
8820 | else | |
a2889657 | 8821 | { |
e8e536a9 | 8822 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 8823 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 8824 | } |
5f5c8ee5 GM |
8825 | |
8826 | w->window_end_valid = Qnil; | |
8827 | w->desired_matrix->no_scrolling_p = 1; | |
8828 | ||
8829 | #if GLYPH_DEBUG | |
8830 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
8831 | #endif | |
8832 | return 1; | |
a2889657 | 8833 | } |
5f5c8ee5 GM |
8834 | |
8835 | return 0; | |
8836 | } | |
a2889657 | 8837 | |
a2889657 | 8838 | |
5f5c8ee5 GM |
8839 | \f |
8840 | /************************************************************************ | |
8841 | Window redisplay reusing current matrix when buffer has changed | |
8842 | ************************************************************************/ | |
8843 | ||
8844 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
8845 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
8846 | int *, int *)); | |
8847 | static struct glyph_row * | |
8848 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
8849 | struct glyph_row *)); | |
8850 | ||
8851 | ||
8852 | /* Return the last row in MATRIX displaying text. If row START is | |
8853 | non-null, start searching with that row. IT gives the dimensions | |
8854 | of the display. Value is null if matrix is empty; otherwise it is | |
8855 | a pointer to the row found. */ | |
8856 | ||
8857 | static struct glyph_row * | |
8858 | find_last_row_displaying_text (matrix, it, start) | |
8859 | struct glyph_matrix *matrix; | |
8860 | struct it *it; | |
8861 | struct glyph_row *start; | |
8862 | { | |
8863 | struct glyph_row *row, *row_found; | |
8864 | ||
8865 | /* Set row_found to the last row in IT->w's current matrix | |
8866 | displaying text. The loop looks funny but think of partially | |
8867 | visible lines. */ | |
8868 | row_found = NULL; | |
8869 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
8870 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8871 | { | |
8872 | xassert (row->enabled_p); | |
8873 | row_found = row; | |
8874 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
8875 | break; | |
8876 | ++row; | |
a2889657 | 8877 | } |
5f5c8ee5 GM |
8878 | |
8879 | return row_found; | |
8880 | } | |
8881 | ||
a2889657 | 8882 | |
5f5c8ee5 GM |
8883 | /* Return the last row in the current matrix of W that is not affected |
8884 | by changes at the start of current_buffer that occurred since the | |
8885 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 8886 | |
5f5c8ee5 GM |
8887 | The global variable beg_unchanged has to contain the number of |
8888 | bytes unchanged at the start of current_buffer. BEG + | |
8889 | beg_unchanged is the buffer position of the first changed byte in | |
8890 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
8891 | at the same buffer positions as they were when the current matrix | |
8892 | was built. */ | |
8893 | ||
8894 | static struct glyph_row * | |
8895 | get_last_unchanged_at_beg_row (w) | |
8896 | struct window *w; | |
8897 | { | |
8898 | int first_changed_pos = BEG + beg_unchanged; | |
8899 | struct glyph_row *row; | |
8900 | struct glyph_row *row_found = NULL; | |
8901 | int yb = window_text_bottom_y (w); | |
8902 | ||
8903 | /* Find the last row displaying unchanged text. */ | |
8904 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8905 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
8906 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 8907 | { |
5f5c8ee5 GM |
8908 | if (/* If row ends before first_changed_pos, it is unchanged, |
8909 | except in some case. */ | |
8910 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
8911 | /* When row ends in ZV and we write at ZV it is not | |
8912 | unchanged. */ | |
8913 | && !row->ends_at_zv_p | |
8914 | /* When first_changed_pos is the end of a continued line, | |
8915 | row is not unchanged because it may be no longer | |
8916 | continued. */ | |
8917 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
8918 | && row->continued_p)) | |
8919 | row_found = row; | |
8920 | ||
8921 | /* Stop if last visible row. */ | |
8922 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
8923 | break; | |
8924 | ||
8925 | ++row; | |
a2889657 JB |
8926 | } |
8927 | ||
5f5c8ee5 | 8928 | return row_found; |
a2889657 | 8929 | } |
5f5c8ee5 GM |
8930 | |
8931 | ||
8932 | /* Find the first glyph row in the current matrix of W that is not | |
8933 | affected by changes at the end of current_buffer since the last | |
8934 | time the window was redisplayed. Return in *DELTA the number of | |
8935 | bytes by which buffer positions in unchanged text at the end of | |
8936 | current_buffer must be adjusted. Value is null if no such row | |
8937 | exists, i.e. all rows are affected by changes. | |
8938 | ||
8939 | The global variable end_unchanged is assumed to contain the number | |
8940 | of unchanged bytes at the end of current_buffer. The buffer | |
8941 | position of the last changed byte in current_buffer is then Z - | |
8942 | end_unchanged. */ | |
8943 | ||
8944 | static struct glyph_row * | |
8945 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
8946 | struct window *w; | |
8947 | int *delta, *delta_bytes; | |
a2889657 | 8948 | { |
5f5c8ee5 GM |
8949 | struct glyph_row *row; |
8950 | struct glyph_row *row_found = NULL; | |
c581d710 | 8951 | |
5f5c8ee5 | 8952 | *delta = *delta_bytes = 0; |
b2a76982 | 8953 | |
5f5c8ee5 GM |
8954 | /* A value of window_end_pos >= end_unchanged means that the window |
8955 | end is in the range of changed text. If so, there is no | |
8956 | unchanged row at the end of W's current matrix. */ | |
8957 | xassert (!NILP (w->window_end_valid)); | |
8958 | if (XFASTINT (w->window_end_pos) >= end_unchanged) | |
8959 | return NULL; | |
8960 | ||
8961 | /* Set row to the last row in W's current matrix displaying text. */ | |
8962 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
8963 | ||
8964 | /* End vpos should always be on text, except in an entirely empty | |
8965 | matrix. */ | |
8966 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
8967 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0); | |
8968 | ||
8969 | /* If matrix is entirely empty, no unchanged row exists. */ | |
8970 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
8971 | { | |
8972 | /* The value of row is the last glyph row in the matrix having a | |
8973 | meaningful buffer position in it. The end position of row | |
8974 | corresponds to window_end_pos. This allows us to translate | |
8975 | buffer positions in the current matrix to current buffer | |
8976 | positions for characters not in changed text. */ | |
8977 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
8978 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
8979 | int last_unchanged_pos, last_unchanged_pos_old; | |
8980 | struct glyph_row *first_text_row | |
8981 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
8982 | ||
8983 | *delta = Z - Z_old; | |
8984 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
8985 | ||
8986 | /* Set last_unchanged_pos to the buffer position of the last | |
8987 | character in the buffer that has not been changed. Z is the | |
8988 | index + 1 of the last byte in current_buffer, i.e. by | |
8989 | subtracting end_unchanged we get the index of the last | |
8990 | unchanged character, and we have to add BEG to get its buffer | |
8991 | position. */ | |
8992 | last_unchanged_pos = Z - end_unchanged + BEG; | |
8993 | last_unchanged_pos_old = last_unchanged_pos - *delta; | |
8994 | ||
8995 | /* Search backward from ROW for a row displaying a line that | |
8996 | starts at a minimum position >= last_unchanged_pos_old. */ | |
8997 | while (row >= first_text_row) | |
8998 | { | |
8999 | xassert (row->enabled_p); | |
9000 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9001 | ||
9002 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
9003 | row_found = row; | |
9004 | --row; | |
9005 | } | |
9006 | } | |
9007 | ||
9008 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
9009 | return row_found; | |
c581d710 RS |
9010 | } |
9011 | ||
c581d710 | 9012 | |
5f5c8ee5 GM |
9013 | /* Make sure that glyph rows in the current matrix of window W |
9014 | reference the same glyph memory as corresponding rows in the | |
9015 | frame's frame matrix. This function is called after scrolling W's | |
9016 | current matrix on a terminal frame in try_window_id and | |
9017 | try_window_reusing_current_matrix. */ | |
9018 | ||
9019 | static void | |
9020 | sync_frame_with_window_matrix_rows (w) | |
9021 | struct window *w; | |
c581d710 | 9022 | { |
5f5c8ee5 GM |
9023 | struct frame *f = XFRAME (w->frame); |
9024 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
9025 | ||
9026 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
9027 | must have a frame matrix. */ | |
9028 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
9029 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
9030 | xassert (!FRAME_WINDOW_P (f)); | |
9031 | ||
9032 | /* If W is a full-width window, glyph pointers in W's current matrix | |
9033 | have, by definition, to be the same as glyph pointers in the | |
9034 | corresponding frame matrix. */ | |
9035 | window_row = w->current_matrix->rows; | |
9036 | window_row_end = window_row + w->current_matrix->nrows; | |
9037 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
9038 | while (window_row < window_row_end) | |
659a218f | 9039 | { |
5f5c8ee5 GM |
9040 | int area; |
9041 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) | |
9042 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
9043 | ++window_row, ++frame_row; | |
659a218f | 9044 | } |
a2889657 | 9045 | } |
5f5c8ee5 GM |
9046 | |
9047 | ||
9048 | /* Try to redisplay window W by reusing its existing display. W's | |
9049 | current matrix must be up to date when this function is called, | |
9050 | i.e. window_end_valid must not be nil. | |
9051 | ||
9052 | Value is | |
9053 | ||
9054 | 1 if display has been updated | |
9055 | 0 if otherwise unsuccessful | |
9056 | -1 if redisplay with same window start is known not to succeed | |
9057 | ||
9058 | The following steps are performed: | |
9059 | ||
9060 | 1. Find the last row in the current matrix of W that is not | |
9061 | affected by changes at the start of current_buffer. If no such row | |
9062 | is found, give up. | |
9063 | ||
9064 | 2. Find the first row in W's current matrix that is not affected by | |
9065 | changes at the end of current_buffer. Maybe there is no such row. | |
9066 | ||
9067 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
9068 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
9069 | the window. | |
9070 | ||
9071 | 4. If cursor is not known to appear on the window, give up. | |
9072 | ||
9073 | 5. If display stopped at the row found in step 2, scroll the | |
9074 | display and current matrix as needed. | |
9075 | ||
9076 | 6. Maybe display some lines at the end of W, if we must. This can | |
9077 | happen under various circumstances, like a partially visible line | |
9078 | becoming fully visible, or because newly displayed lines are displayed | |
9079 | in smaller font sizes. | |
9080 | ||
9081 | 7. Update W's window end information. */ | |
9082 | ||
9083 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
9084 | |
9085 | static int | |
5f5c8ee5 | 9086 | try_window_id (w) |
12adba34 | 9087 | struct window *w; |
12adba34 | 9088 | { |
5f5c8ee5 GM |
9089 | struct frame *f = XFRAME (w->frame); |
9090 | struct glyph_matrix *current_matrix = w->current_matrix; | |
9091 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
9092 | struct glyph_row *last_unchanged_at_beg_row; | |
9093 | struct glyph_row *first_unchanged_at_end_row; | |
9094 | struct glyph_row *row; | |
9095 | struct glyph_row *bottom_row; | |
9096 | int bottom_vpos; | |
9097 | struct it it; | |
9098 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
9099 | struct text_pos start_pos; | |
9100 | struct run run; | |
9101 | int first_unchanged_at_end_vpos = 0; | |
9102 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
9103 | struct text_pos start; | |
9104 | ||
9105 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
9106 | ||
9107 | /* Check pre-conditions. Window end must be valid, otherwise | |
9108 | the current matrix would not be up to date. */ | |
9109 | xassert (!NILP (w->window_end_valid)); | |
9110 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
9111 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
9112 | ||
9113 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
9114 | only if buffer has really changed. The reason is that the gap is | |
9115 | initially at Z for freshly visited files. The code below would | |
9116 | set end_unchanged to 0 in that case. */ | |
9117 | if (MODIFF > SAVE_MODIFF) | |
9118 | { | |
9119 | if (GPT - BEG < beg_unchanged) | |
9120 | beg_unchanged = GPT - BEG; | |
9121 | if (Z - GPT < end_unchanged) | |
9122 | end_unchanged = Z - GPT; | |
9123 | } | |
9124 | ||
9125 | /* If window starts after a line end, and the last change is in | |
9126 | front of that newline, then changes don't affect the display. | |
9127 | This case happens with stealth-fontification. */ | |
9128 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9129 | if (CHARPOS (start) > BEGV | |
9130 | && Z - end_unchanged < CHARPOS (start) - 1 | |
9131 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' | |
9132 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9133 | { | |
9134 | /* We have to update window end positions because the buffer's | |
9135 | size has changed. */ | |
9136 | w->window_end_pos | |
9137 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9138 | w->window_end_bytepos | |
9139 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9140 | return 1; | |
9141 | } | |
9142 | ||
9143 | /* Return quickly if changes are all below what is displayed in the | |
9144 | window, and if PT is in the window. */ | |
9145 | if (beg_unchanged > MATRIX_ROW_END_CHARPOS (row) | |
9146 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9147 | { | |
9148 | /* We have to update window end positions because the buffer's | |
9149 | size has changed. */ | |
9150 | w->window_end_pos | |
9151 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9152 | w->window_end_bytepos | |
9153 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9154 | return 1; | |
9155 | } | |
9156 | ||
9157 | /* Check that window start agrees with the start of the first glyph | |
9158 | row in its current matrix. Check this after we know the window | |
9159 | start is not in changed text, otherwise positions would not be | |
9160 | comparable. */ | |
9161 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9162 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
9163 | return 0; | |
9164 | ||
9165 | /* Remember beg_unchanged and end_unchanged for debugging purposes. */ | |
9166 | IF_DEBUG (debug_beg_unchanged = beg_unchanged; | |
9167 | debug_end_unchanged = end_unchanged); | |
9168 | ||
9169 | /* Compute the position at which we have to start displaying new | |
9170 | lines. Some of the lines at the top of the window might be | |
9171 | reusable because they are not displaying changed text. Find the | |
9172 | last row in W's current matrix not affected by changes at the | |
9173 | start of current_buffer. Value is null if changes start in the | |
9174 | first line of window. */ | |
9175 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
9176 | if (last_unchanged_at_beg_row) | |
9177 | { | |
9178 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
9179 | start_pos = it.current.pos; | |
9180 | ||
9181 | /* Start displaying new lines in the desired matrix at the same | |
9182 | vpos we would use in the current matrix, i.e. below | |
9183 | last_unchanged_at_beg_row. */ | |
9184 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
9185 | current_matrix); | |
9186 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
9187 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
9188 | ||
9189 | xassert (it.hpos == 0 && it.current_x == 0); | |
9190 | } | |
9191 | else | |
9192 | { | |
9193 | /* There are no reusable lines at the start of the window. | |
9194 | Start displaying in the first line. */ | |
9195 | start_display (&it, w, start); | |
9196 | start_pos = it.current.pos; | |
9197 | } | |
9198 | ||
9199 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
9200 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
9201 | ||
9202 | /* Find the first row that is not affected by changes at the end of | |
9203 | the buffer. Value will be null if there is no unchanged row, in | |
9204 | which case we must redisplay to the end of the window. delta | |
9205 | will be set to the value by which buffer positions beginning with | |
9206 | first_unchanged_at_end_row have to be adjusted due to text | |
9207 | changes. */ | |
9208 | first_unchanged_at_end_row | |
9209 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
9210 | IF_DEBUG (debug_delta = delta); | |
9211 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
9212 | ||
9213 | /* Set stop_pos to the buffer position up to which we will have to | |
9214 | display new lines. If first_unchanged_at_end_row != NULL, this | |
9215 | is the buffer position of the start of the line displayed in that | |
9216 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
9217 | that we don't stop at a buffer position. */ | |
9218 | stop_pos = 0; | |
9219 | if (first_unchanged_at_end_row) | |
9220 | { | |
9221 | xassert (last_unchanged_at_beg_row == NULL | |
9222 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
9223 | ||
9224 | /* If this is a continuation line, move forward to the next one | |
9225 | that isn't. Changes in lines above affect this line. | |
9226 | Caution: this may move first_unchanged_at_end_row to a row | |
9227 | not displaying text. */ | |
9228 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
9229 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9230 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9231 | < it.last_visible_y)) | |
9232 | ++first_unchanged_at_end_row; | |
9233 | ||
9234 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9235 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9236 | >= it.last_visible_y)) | |
9237 | first_unchanged_at_end_row = NULL; | |
9238 | else | |
9239 | { | |
9240 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
9241 | + delta); | |
9242 | first_unchanged_at_end_vpos | |
9243 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9244 | xassert (stop_pos >= Z - end_unchanged); | |
9245 | } | |
9246 | } | |
9247 | else if (last_unchanged_at_beg_row == NULL) | |
9248 | return 0; | |
9249 | ||
9250 | ||
9251 | #if GLYPH_DEBUG | |
9252 | ||
9253 | /* Either there is no unchanged row at the end, or the one we have | |
9254 | now displays text. This is a necessary condition for the window | |
9255 | end pos calculation at the end of this function. */ | |
9256 | xassert (first_unchanged_at_end_row == NULL | |
9257 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
9258 | ||
9259 | debug_last_unchanged_at_beg_vpos | |
9260 | = (last_unchanged_at_beg_row | |
9261 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
9262 | : -1); | |
9263 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
9264 | ||
9265 | #endif /* GLYPH_DEBUG != 0 */ | |
9266 | ||
9267 | ||
9268 | /* Display new lines. Set last_text_row to the last new line | |
9269 | displayed which has text on it, i.e. might end up as being the | |
9270 | line where the window_end_vpos is. */ | |
9271 | w->cursor.vpos = -1; | |
9272 | last_text_row = NULL; | |
9273 | overlay_arrow_seen = 0; | |
9274 | while (it.current_y < it.last_visible_y | |
9275 | && !fonts_changed_p | |
9276 | && (first_unchanged_at_end_row == NULL | |
9277 | || IT_CHARPOS (it) < stop_pos)) | |
9278 | { | |
9279 | if (display_line (&it)) | |
9280 | last_text_row = it.glyph_row - 1; | |
9281 | } | |
9282 | ||
9283 | if (fonts_changed_p) | |
9284 | return -1; | |
9285 | ||
9286 | ||
9287 | /* Compute differences in buffer positions, y-positions etc. for | |
9288 | lines reused at the bottom of the window. Compute what we can | |
9289 | scroll. */ | |
9290 | if (first_unchanged_at_end_row) | |
9291 | { | |
9292 | dvpos = (it.vpos | |
9293 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
9294 | current_matrix)); | |
9295 | dy = it.current_y - first_unchanged_at_end_row->y; | |
9296 | run.current_y = first_unchanged_at_end_row->y; | |
9297 | run.desired_y = run.current_y + dy; | |
9298 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
9299 | } | |
9300 | else | |
9301 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
9302 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); | |
9303 | ||
9304 | ||
9305 | /* Find the cursor if not already found. We have to decide whether | |
9306 | PT will appear on this window (it sometimes doesn't, but this is | |
9307 | not a very frequent case.) This decision has to be made before | |
9308 | the current matrix is altered. A value of cursor.vpos < 0 means | |
9309 | that PT is either in one of the lines beginning at | |
9310 | first_unchanged_at_end_row or below the window. Don't care for | |
9311 | lines that might be displayed later at the window end; as | |
9312 | mentioned, this is not a frequent case. */ | |
9313 | if (w->cursor.vpos < 0) | |
9314 | { | |
9315 | int last_y = min (it.last_visible_y, it.last_visible_y + dy); | |
9316 | ||
9317 | /* Cursor in unchanged rows at the top? */ | |
9318 | if (PT < CHARPOS (start_pos) | |
9319 | && last_unchanged_at_beg_row) | |
9320 | { | |
9321 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9322 | while (row <= last_unchanged_at_beg_row | |
9323 | && MATRIX_ROW_END_CHARPOS (row) <= PT) | |
9324 | ++row; | |
9325 | xassert (row <= last_unchanged_at_beg_row); | |
9326 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
9327 | } | |
9328 | ||
9329 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
9330 | else if (first_unchanged_at_end_row) | |
9331 | { | |
9332 | row = first_unchanged_at_end_row; | |
9333 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9334 | { | |
9335 | if (PT - delta >= MATRIX_ROW_START_CHARPOS (row) | |
9336 | && PT - delta < MATRIX_ROW_END_CHARPOS (row)) | |
9337 | { | |
9338 | set_cursor_from_row (w, row, w->current_matrix, delta, | |
9339 | delta_bytes, dy, dvpos); | |
9340 | break; | |
9341 | } | |
9342 | else if (MATRIX_ROW_BOTTOM_Y (row) >= last_y) | |
9343 | break; | |
9344 | ++row; | |
9345 | } | |
9346 | } | |
9347 | ||
9348 | /* Give up if cursor was not found. */ | |
9349 | if (w->cursor.vpos < 0) | |
9350 | { | |
9351 | clear_glyph_matrix (w->desired_matrix); | |
9352 | return -1; | |
9353 | } | |
9354 | } | |
9355 | ||
9356 | /* Don't let the cursor end in the scroll margins. */ | |
9357 | { | |
9358 | int this_scroll_margin, cursor_height; | |
9359 | ||
9360 | this_scroll_margin = max (0, scroll_margin); | |
9361 | this_scroll_margin = min (this_scroll_margin, | |
9362 | XFASTINT (w->height) / 4); | |
9363 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
9364 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
9365 | ||
9366 | if ((w->cursor.y < this_scroll_margin | |
9367 | && CHARPOS (start) > BEGV) | |
9368 | /* Don't take scroll margin into account at the bottom because | |
9369 | old redisplay didn't do it either. */ | |
9370 | || w->cursor.y + cursor_height > it.last_visible_y) | |
9371 | { | |
9372 | w->cursor.vpos = -1; | |
9373 | clear_glyph_matrix (w->desired_matrix); | |
9374 | return -1; | |
9375 | } | |
9376 | } | |
9377 | ||
9378 | /* Scroll the display. Do it before changing the current matrix so | |
9379 | that xterm.c doesn't get confused about where the cursor glyph is | |
9380 | found. */ | |
9381 | if (dy) | |
9382 | { | |
9383 | update_begin (f); | |
9384 | ||
9385 | if (FRAME_WINDOW_P (f)) | |
9386 | { | |
9387 | rif->update_window_begin_hook (w); | |
9388 | rif->scroll_run_hook (w, &run); | |
9389 | rif->update_window_end_hook (w, 0); | |
9390 | } | |
9391 | else | |
9392 | { | |
9393 | /* Terminal frame. In this case, dvpos gives the number of | |
9394 | lines to scroll by; dvpos < 0 means scroll up. */ | |
9395 | int first_unchanged_at_end_vpos | |
9396 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
9397 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
9398 | int end = XFASTINT (w->top) + window_internal_height (w); | |
9399 | ||
9400 | /* Perform the operation on the screen. */ | |
9401 | if (dvpos > 0) | |
9402 | { | |
9403 | /* Scroll last_unchanged_at_beg_row to the end of the | |
9404 | window down dvpos lines. */ | |
9405 | set_terminal_window (end); | |
9406 | ||
9407 | /* On dumb terminals delete dvpos lines at the end | |
9408 | before inserting dvpos empty lines. */ | |
9409 | if (!scroll_region_ok) | |
9410 | ins_del_lines (end - dvpos, -dvpos); | |
9411 | ||
9412 | /* Insert dvpos empty lines in front of | |
9413 | last_unchanged_at_beg_row. */ | |
9414 | ins_del_lines (from, dvpos); | |
9415 | } | |
9416 | else if (dvpos < 0) | |
9417 | { | |
9418 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
9419 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
9420 | set_terminal_window (end); | |
9421 | ||
9422 | /* Delete dvpos lines in front of | |
9423 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
9424 | the cursor to the given vpos and emit |dvpos| delete | |
9425 | line sequences. */ | |
9426 | ins_del_lines (from + dvpos, dvpos); | |
9427 | ||
9428 | /* On a dumb terminal insert dvpos empty lines at the | |
9429 | end. */ | |
9430 | if (!scroll_region_ok) | |
9431 | ins_del_lines (end + dvpos, -dvpos); | |
9432 | } | |
9433 | ||
9434 | set_terminal_window (0); | |
9435 | } | |
9436 | ||
9437 | update_end (f); | |
9438 | } | |
9439 | ||
9440 | /* Shift reused rows of the current matrix to the right position. */ | |
9441 | if (dvpos < 0) | |
9442 | { | |
9443 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
9444 | bottom_vpos, dvpos); | |
9445 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
9446 | bottom_vpos, 0); | |
9447 | } | |
9448 | else if (dvpos > 0) | |
9449 | { | |
9450 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
9451 | bottom_vpos, dvpos); | |
9452 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
9453 | first_unchanged_at_end_vpos + dvpos, 0); | |
9454 | } | |
9455 | ||
9456 | /* For frame-based redisplay, make sure that current frame and window | |
9457 | matrix are in sync with respect to glyph memory. */ | |
9458 | if (!FRAME_WINDOW_P (f)) | |
9459 | sync_frame_with_window_matrix_rows (w); | |
9460 | ||
9461 | /* Adjust buffer positions in reused rows. */ | |
9462 | if (delta) | |
9463 | increment_glyph_matrix_buffer_positions (current_matrix, | |
9464 | first_unchanged_at_end_vpos + dvpos, | |
9465 | bottom_vpos, delta, delta_bytes); | |
9466 | ||
9467 | /* Adjust Y positions. */ | |
9468 | if (dy) | |
9469 | shift_glyph_matrix (w, current_matrix, | |
9470 | first_unchanged_at_end_vpos + dvpos, | |
9471 | bottom_vpos, dy); | |
9472 | ||
9473 | if (first_unchanged_at_end_row) | |
9474 | first_unchanged_at_end_row += dvpos; | |
9475 | ||
9476 | /* If scrolling up, there may be some lines to display at the end of | |
9477 | the window. */ | |
9478 | last_text_row_at_end = NULL; | |
9479 | if (dy < 0) | |
9480 | { | |
9481 | /* Set last_row to the glyph row in the current matrix where the | |
9482 | window end line is found. It has been moved up or down in | |
9483 | the matrix by dvpos. */ | |
9484 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
9485 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
9486 | ||
9487 | /* If last_row is the window end line, it should display text. */ | |
9488 | xassert (last_row->displays_text_p); | |
9489 | ||
9490 | /* If window end line was partially visible before, begin | |
9491 | displaying at that line. Otherwise begin displaying with the | |
9492 | line following it. */ | |
9493 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
9494 | { | |
9495 | init_to_row_start (&it, w, last_row); | |
9496 | it.vpos = last_vpos; | |
9497 | it.current_y = last_row->y; | |
9498 | } | |
9499 | else | |
9500 | { | |
9501 | init_to_row_end (&it, w, last_row); | |
9502 | it.vpos = 1 + last_vpos; | |
9503 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
9504 | ++last_row; | |
9505 | } | |
12adba34 | 9506 | |
5f5c8ee5 GM |
9507 | /* We may start in a continuation line. If so, we have to get |
9508 | the right continuation_lines_width and current_x. */ | |
9509 | it.continuation_lines_width = last_row->continuation_lines_width; | |
9510 | it.hpos = it.current_x = 0; | |
9511 | ||
9512 | /* Display the rest of the lines at the window end. */ | |
9513 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
9514 | while (it.current_y < it.last_visible_y | |
9515 | && !fonts_changed_p) | |
9516 | { | |
9517 | /* Is it always sure that the display agrees with lines in | |
9518 | the current matrix? I don't think so, so we mark rows | |
9519 | displayed invalid in the current matrix by setting their | |
9520 | enabled_p flag to zero. */ | |
9521 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
9522 | if (display_line (&it)) | |
9523 | last_text_row_at_end = it.glyph_row - 1; | |
9524 | } | |
9525 | } | |
12adba34 | 9526 | |
5f5c8ee5 GM |
9527 | /* Update window_end_pos and window_end_vpos. */ |
9528 | if (first_unchanged_at_end_row | |
9529 | && first_unchanged_at_end_row->y < it.last_visible_y | |
9530 | && !last_text_row_at_end) | |
9531 | { | |
9532 | /* Window end line if one of the preserved rows from the current | |
9533 | matrix. Set row to the last row displaying text in current | |
9534 | matrix starting at first_unchanged_at_end_row, after | |
9535 | scrolling. */ | |
9536 | xassert (first_unchanged_at_end_row->displays_text_p); | |
9537 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
9538 | first_unchanged_at_end_row); | |
9539 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9540 | ||
9541 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
9542 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
9543 | XSETFASTINT (w->window_end_vpos, | |
9544 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
9545 | } | |
9546 | else if (last_text_row_at_end) | |
9547 | { | |
9548 | XSETFASTINT (w->window_end_pos, | |
9549 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
9550 | w->window_end_bytepos | |
9551 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
9552 | XSETFASTINT (w->window_end_vpos, | |
9553 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
9554 | } | |
9555 | else if (last_text_row) | |
9556 | { | |
9557 | /* We have displayed either to the end of the window or at the | |
9558 | end of the window, i.e. the last row with text is to be found | |
9559 | in the desired matrix. */ | |
9560 | XSETFASTINT (w->window_end_pos, | |
9561 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9562 | w->window_end_bytepos | |
9563 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9564 | XSETFASTINT (w->window_end_vpos, | |
9565 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
9566 | } | |
9567 | else if (first_unchanged_at_end_row == NULL | |
9568 | && last_text_row == NULL | |
9569 | && last_text_row_at_end == NULL) | |
9570 | { | |
9571 | /* Displayed to end of window, but no line containing text was | |
9572 | displayed. Lines were deleted at the end of the window. */ | |
9573 | int vpos; | |
9574 | int top_line_p = WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0; | |
9575 | ||
9576 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
9577 | if ((w->desired_matrix->rows[vpos + top_line_p].enabled_p | |
9578 | && w->desired_matrix->rows[vpos + top_line_p].displays_text_p) | |
9579 | || (!w->desired_matrix->rows[vpos + top_line_p].enabled_p | |
9580 | && w->current_matrix->rows[vpos + top_line_p].displays_text_p)) | |
9581 | break; | |
12adba34 | 9582 | |
5f5c8ee5 GM |
9583 | w->window_end_vpos = make_number (vpos); |
9584 | } | |
9585 | else | |
9586 | abort (); | |
9587 | ||
9588 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
9589 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 9590 | |
5f5c8ee5 GM |
9591 | /* Record that display has not been completed. */ |
9592 | w->window_end_valid = Qnil; | |
9593 | w->desired_matrix->no_scrolling_p = 1; | |
9594 | return 1; | |
12adba34 | 9595 | } |
0f9c0ff0 | 9596 | |
a2889657 | 9597 | |
5f5c8ee5 GM |
9598 | \f |
9599 | /*********************************************************************** | |
9600 | More debugging support | |
9601 | ***********************************************************************/ | |
a2889657 | 9602 | |
5f5c8ee5 | 9603 | #if GLYPH_DEBUG |
a2889657 | 9604 | |
5f5c8ee5 GM |
9605 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
9606 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 9607 | |
31b24551 | 9608 | |
5f5c8ee5 GM |
9609 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
9610 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 9611 | |
5f5c8ee5 GM |
9612 | void |
9613 | dump_glyph_matrix (matrix, with_glyphs_p) | |
9614 | struct glyph_matrix *matrix; | |
9615 | int with_glyphs_p; | |
9616 | { | |
efc63ef0 | 9617 | int i; |
5f5c8ee5 GM |
9618 | for (i = 0; i < matrix->nrows; ++i) |
9619 | dump_glyph_row (matrix, i, with_glyphs_p); | |
9620 | } | |
31b24551 | 9621 | |
68a37fa8 | 9622 | |
5f5c8ee5 GM |
9623 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
9624 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 9625 | |
5f5c8ee5 GM |
9626 | void |
9627 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
9628 | struct glyph_matrix *matrix; | |
9629 | int vpos, with_glyphs_p; | |
9630 | { | |
9631 | struct glyph_row *row; | |
9632 | ||
9633 | if (vpos < 0 || vpos >= matrix->nrows) | |
9634 | return; | |
9635 | ||
9636 | row = MATRIX_ROW (matrix, vpos); | |
9637 | ||
9638 | fprintf (stderr, "Row Start End Used oEI><O\\CTZF X Y W\n"); | |
9639 | fprintf (stderr, "=============================================\n"); | |
9640 | ||
9641 | 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", | |
9642 | row - matrix->rows, | |
9643 | MATRIX_ROW_START_CHARPOS (row), | |
9644 | MATRIX_ROW_END_CHARPOS (row), | |
9645 | row->used[TEXT_AREA], | |
9646 | row->contains_overlapping_glyphs_p, | |
9647 | row->enabled_p, | |
9648 | row->inverse_p, | |
9649 | row->truncated_on_left_p, | |
9650 | row->truncated_on_right_p, | |
9651 | row->overlay_arrow_p, | |
9652 | row->continued_p, | |
9653 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
9654 | row->displays_text_p, | |
9655 | row->ends_at_zv_p, | |
9656 | row->fill_line_p, | |
9657 | row->x, | |
9658 | row->y, | |
9659 | row->pixel_width); | |
9660 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, | |
9661 | row->end.overlay_string_index); | |
9662 | fprintf (stderr, "%9d %5d\n", | |
9663 | CHARPOS (row->start.string_pos), | |
9664 | CHARPOS (row->end.string_pos)); | |
9665 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
9666 | row->end.dpvec_index); | |
9667 | ||
9668 | if (with_glyphs_p) | |
bd66d1ba | 9669 | { |
5f5c8ee5 GM |
9670 | struct glyph *glyph, *glyph_end; |
9671 | int prev_had_glyphs_p; | |
9672 | ||
9673 | glyph = row->glyphs[TEXT_AREA]; | |
9674 | glyph_end = glyph + row->used[TEXT_AREA]; | |
9675 | ||
9676 | /* Glyph for a line end in text. */ | |
9677 | if (glyph == glyph_end && glyph->charpos > 0) | |
9678 | ++glyph_end; | |
9679 | ||
9680 | if (glyph < glyph_end) | |
bd66d1ba | 9681 | { |
5f5c8ee5 GM |
9682 | fprintf (stderr, " Glyph Type Pos W Code C Face LR\n"); |
9683 | prev_had_glyphs_p = 1; | |
bd66d1ba RS |
9684 | } |
9685 | else | |
5f5c8ee5 GM |
9686 | prev_had_glyphs_p = 0; |
9687 | ||
9688 | while (glyph < glyph_end) | |
f7b4b63a | 9689 | { |
5f5c8ee5 GM |
9690 | if (glyph->type == CHAR_GLYPH) |
9691 | { | |
9692 | fprintf (stderr, | |
9693 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
9694 | glyph - row->glyphs[TEXT_AREA], | |
9695 | 'C', | |
9696 | glyph->charpos, | |
9697 | glyph->pixel_width, | |
9698 | glyph->u.ch.code, | |
9699 | (glyph->u.ch.code < 0x80 && glyph->u.ch.code >= ' ' | |
9700 | ? glyph->u.ch.code | |
9701 | : '.'), | |
9702 | glyph->u.ch.face_id, | |
9703 | glyph->left_box_line_p, | |
9704 | glyph->right_box_line_p); | |
9705 | } | |
9706 | else if (glyph->type == STRETCH_GLYPH) | |
9707 | { | |
9708 | fprintf (stderr, | |
9709 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
9710 | glyph - row->glyphs[TEXT_AREA], | |
9711 | 'S', | |
9712 | glyph->charpos, | |
9713 | glyph->pixel_width, | |
9714 | 0, | |
9715 | '.', | |
9716 | glyph->u.stretch.face_id, | |
9717 | glyph->left_box_line_p, | |
9718 | glyph->right_box_line_p); | |
9719 | } | |
9720 | else if (glyph->type == IMAGE_GLYPH) | |
9721 | { | |
9722 | fprintf (stderr, | |
9723 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
9724 | glyph - row->glyphs[TEXT_AREA], | |
9725 | 'I', | |
9726 | glyph->charpos, | |
9727 | glyph->pixel_width, | |
9728 | glyph->u.img.id, | |
9729 | '.', | |
9730 | glyph->u.img.face_id, | |
9731 | glyph->left_box_line_p, | |
9732 | glyph->right_box_line_p); | |
9733 | } | |
9734 | ++glyph; | |
f7b4b63a | 9735 | } |
f4faa47c | 9736 | } |
5f5c8ee5 | 9737 | } |
f4faa47c | 9738 | |
a2889657 | 9739 | |
5f5c8ee5 GM |
9740 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
9741 | Sdump_glyph_matrix, 0, 1, "p", | |
9742 | "Dump the current matrix of the selected window to stderr.\n\ | |
9743 | Shows contents of glyph row structures. With non-nil optional\n\ | |
9744 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
9745 | (with_glyphs_p) | |
9746 | { | |
9747 | struct window *w = XWINDOW (selected_window); | |
9748 | struct buffer *buffer = XBUFFER (w->buffer); | |
9749 | ||
9750 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
9751 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
9752 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
9753 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
9754 | fprintf (stderr, "=============================================\n"); | |
9755 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
9756 | return Qnil; | |
9757 | } | |
1c2250c2 | 9758 | |
1fca3fae | 9759 | |
5f5c8ee5 GM |
9760 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
9761 | "Dump glyph row ROW to stderr.") | |
9762 | (row) | |
9763 | Lisp_Object row; | |
9764 | { | |
9765 | CHECK_NUMBER (row, 0); | |
9766 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
9767 | return Qnil; | |
9768 | } | |
1fca3fae | 9769 | |
67481ae5 | 9770 | |
5f5c8ee5 GM |
9771 | DEFUN ("dump-toolbar-row", Fdump_toolbar_row, Sdump_toolbar_row, |
9772 | 0, 0, "", "") | |
9773 | () | |
9774 | { | |
9775 | struct glyph_matrix *m = (XWINDOW (selected_frame->toolbar_window) | |
9776 | ->current_matrix); | |
9777 | dump_glyph_row (m, 0, 1); | |
9778 | return Qnil; | |
9779 | } | |
ca26e1c8 | 9780 | |
0f9c0ff0 | 9781 | |
5f5c8ee5 GM |
9782 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
9783 | Strace_redisplay_toggle, 0, 0, "", | |
9784 | "Toggle tracing of redisplay.") | |
9785 | () | |
9786 | { | |
9787 | trace_redisplay_p = !trace_redisplay_p; | |
9788 | return Qnil; | |
9789 | } | |
9790 | ||
9791 | ||
9792 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 9793 | |
ca26e1c8 | 9794 | |
5f5c8ee5 GM |
9795 | \f |
9796 | /*********************************************************************** | |
9797 | Building Desired Matrix Rows | |
9798 | ***********************************************************************/ | |
a2889657 | 9799 | |
5f5c8ee5 GM |
9800 | /* Return a temporary glyph row holding the glyphs of an overlay |
9801 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 9802 | |
5f5c8ee5 GM |
9803 | static struct glyph_row * |
9804 | get_overlay_arrow_glyph_row (w) | |
9805 | struct window *w; | |
9806 | { | |
9807 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
9808 | struct buffer *buffer = XBUFFER (w->buffer); | |
9809 | struct buffer *old = current_buffer; | |
9810 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
9811 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
9812 | unsigned char *arrow_end = arrow_string + arrow_len; | |
9813 | unsigned char *p; | |
9814 | struct it it; | |
9815 | int multibyte_p; | |
9816 | int n_glyphs_before; | |
9817 | ||
9818 | set_buffer_temp (buffer); | |
9819 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
9820 | it.glyph_row->used[TEXT_AREA] = 0; | |
9821 | SET_TEXT_POS (it.position, 0, 0); | |
9822 | ||
9823 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
9824 | p = arrow_string; | |
9825 | while (p < arrow_end) | |
9826 | { | |
9827 | Lisp_Object face, ilisp; | |
9828 | ||
9829 | /* Get the next character. */ | |
9830 | if (multibyte_p) | |
4fdb80f2 | 9831 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
9832 | else |
9833 | it.c = *p, it.len = 1; | |
9834 | p += it.len; | |
9835 | ||
9836 | /* Get its face. */ | |
9837 | XSETFASTINT (ilisp, p - arrow_string); | |
9838 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
9839 | it.face_id = compute_char_face (f, it.c, face); | |
9840 | ||
9841 | /* Compute its width, get its glyphs. */ | |
9842 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 9843 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
9844 | PRODUCE_GLYPHS (&it); |
9845 | ||
9846 | /* If this character doesn't fit any more in the line, we have | |
9847 | to remove some glyphs. */ | |
9848 | if (it.current_x > it.last_visible_x) | |
9849 | { | |
9850 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
9851 | break; | |
9852 | } | |
9853 | } | |
9854 | ||
9855 | set_buffer_temp (old); | |
9856 | return it.glyph_row; | |
9857 | } | |
ca26e1c8 | 9858 | |
b0a0fbda | 9859 | |
5f5c8ee5 GM |
9860 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
9861 | glyphs are only inserted for terminal frames since we can't really | |
9862 | win with truncation glyphs when partially visible glyphs are | |
9863 | involved. Which glyphs to insert is determined by | |
9864 | produce_special_glyphs. */ | |
67481ae5 | 9865 | |
5f5c8ee5 GM |
9866 | static void |
9867 | insert_left_trunc_glyphs (it) | |
9868 | struct it *it; | |
9869 | { | |
9870 | struct it truncate_it; | |
9871 | struct glyph *from, *end, *to, *toend; | |
9872 | ||
9873 | xassert (!FRAME_WINDOW_P (it->f)); | |
9874 | ||
9875 | /* Get the truncation glyphs. */ | |
9876 | truncate_it = *it; | |
9877 | truncate_it.charset = -1; | |
9878 | truncate_it.current_x = 0; | |
9879 | truncate_it.face_id = DEFAULT_FACE_ID; | |
9880 | truncate_it.glyph_row = &scratch_glyph_row; | |
9881 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
9882 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
9883 | truncate_it.object = 0; | |
9884 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); | |
9885 | ||
9886 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
9887 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
9888 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
9889 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
9890 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
9891 | ||
9892 | while (from < end) | |
9893 | *to++ = *from++; | |
9894 | ||
9895 | /* There may be padding glyphs left over. Remove them. */ | |
9896 | from = to; | |
9897 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
9898 | ++from; | |
9899 | while (from < toend) | |
9900 | *to++ = *from++; | |
9901 | ||
9902 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
9903 | } | |
e0bfbde6 | 9904 | |
e0bfbde6 | 9905 | |
5f5c8ee5 | 9906 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 9907 | |
5f5c8ee5 GM |
9908 | Most of the time, ascent and height of a display line will be equal |
9909 | to the max_ascent and max_height values of the display iterator | |
9910 | structure. This is not the case if | |
67481ae5 | 9911 | |
5f5c8ee5 GM |
9912 | 1. We hit ZV without displaying anything. In this case, max_ascent |
9913 | and max_height will be zero. | |
1c9241f5 | 9914 | |
5f5c8ee5 GM |
9915 | 2. We have some glyphs that don't contribute to the line height. |
9916 | (The glyph row flag contributes_to_line_height_p is for future | |
9917 | pixmap extensions). | |
f6fd109b | 9918 | |
5f5c8ee5 GM |
9919 | The first case is easily covered by using default values because in |
9920 | these cases, the line height does not really matter, except that it | |
9921 | must not be zero. */ | |
67481ae5 | 9922 | |
5f5c8ee5 GM |
9923 | static void |
9924 | compute_line_metrics (it) | |
9925 | struct it *it; | |
9926 | { | |
9927 | struct glyph_row *row = it->glyph_row; | |
9928 | int area, i; | |
1c2250c2 | 9929 | |
5f5c8ee5 GM |
9930 | if (FRAME_WINDOW_P (it->f)) |
9931 | { | |
9932 | int i, top_line_height; | |
1c2250c2 | 9933 | |
5f5c8ee5 GM |
9934 | /* The line may consist of one space only, that was added to |
9935 | place the cursor on it. If so, the row's height hasn't been | |
9936 | computed yet. */ | |
9937 | if (row->height == 0) | |
9938 | { | |
9939 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 9940 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
9941 | row->ascent = it->max_ascent; |
9942 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
9943 | row->phys_ascent = it->max_phys_ascent; |
9944 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
9945 | } |
9946 | ||
9947 | /* Compute the width of this line. */ | |
9948 | row->pixel_width = row->x; | |
9949 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
9950 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
9951 | ||
9952 | xassert (row->pixel_width >= 0); | |
9953 | xassert (row->ascent >= 0 && row->height > 0); | |
9954 | ||
312246d1 GM |
9955 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
9956 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
9957 | ||
9958 | /* If first line's physical ascent is larger than its logical | |
9959 | ascent, use the physical ascent, and make the row taller. | |
9960 | This makes accented characters fully visible. */ | |
9961 | if (row == it->w->desired_matrix->rows | |
9962 | && row->phys_ascent > row->ascent) | |
9963 | { | |
9964 | row->height += row->phys_ascent - row->ascent; | |
9965 | row->ascent = row->phys_ascent; | |
9966 | } | |
9967 | ||
5f5c8ee5 GM |
9968 | /* Compute how much of the line is visible. */ |
9969 | row->visible_height = row->height; | |
9970 | ||
9971 | top_line_height = WINDOW_DISPLAY_TOP_LINE_HEIGHT (it->w); | |
9972 | if (row->y < top_line_height) | |
9973 | row->visible_height -= top_line_height - row->y; | |
9974 | else | |
9975 | { | |
9976 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
9977 | if (row->y + row->height > max_y) | |
9978 | row->visible_height -= row->y + row->height - max_y; | |
9979 | } | |
9980 | } | |
9981 | else | |
9982 | { | |
9983 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
9984 | row->ascent = row->phys_ascent = 0; |
9985 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 9986 | } |
67481ae5 | 9987 | |
5f5c8ee5 GM |
9988 | /* Compute a hash code for this row. */ |
9989 | row->hash = 0; | |
9990 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
9991 | for (i = 0; i < row->used[area]; ++i) | |
9992 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
9993 | + row->glyphs[area][i].u.val | |
9994 | + (row->glyphs[area][i].type << 2)); | |
a2889657 | 9995 | |
5f5c8ee5 | 9996 | it->max_ascent = it->max_descent = 0; |
312246d1 | 9997 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 9998 | } |
12adba34 | 9999 | |
ca26e1c8 | 10000 | |
5f5c8ee5 GM |
10001 | /* Append one space to the glyph row of iterator IT if doing a |
10002 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
10003 | space have the default face, otherwise let it have the same face as | |
10004 | IT->face_id. This function is called to make sure that there is | |
10005 | always one glyph at the end of a glyph row that the cursor can be | |
10006 | set on under window-systems. (If there weren't such a glyph we | |
10007 | would not know how wide and tall the cursor should be displayed). */ | |
ca26e1c8 | 10008 | |
5f5c8ee5 GM |
10009 | static void |
10010 | append_space (it, default_face_p) | |
10011 | struct it *it; | |
10012 | int default_face_p; | |
10013 | { | |
10014 | if (FRAME_WINDOW_P (it->f)) | |
10015 | { | |
10016 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 10017 | |
5f5c8ee5 GM |
10018 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
10019 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 10020 | { |
5f5c8ee5 GM |
10021 | /* Save some values that must not be changed. */ |
10022 | int saved_x = it->current_x; | |
10023 | struct text_pos saved_pos; | |
10024 | int saved_what = it->what; | |
10025 | int saved_face_id = it->face_id; | |
10026 | int saved_charset = it->charset; | |
10027 | Lisp_Object saved_object; | |
10028 | ||
10029 | saved_object = it->object; | |
10030 | saved_pos = it->position; | |
10031 | ||
10032 | it->what = IT_CHARACTER; | |
10033 | bzero (&it->position, sizeof it->position); | |
10034 | it->object = 0; | |
10035 | it->c = ' '; | |
10036 | it->len = 1; | |
10037 | it->charset = CHARSET_ASCII; | |
10038 | ||
10039 | if (default_face_p) | |
10040 | it->face_id = DEFAULT_FACE_ID; | |
10041 | if (it->multibyte_p) | |
10042 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, CHARSET_ASCII); | |
10043 | else | |
10044 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, -1); | |
1842fc1a | 10045 | |
5f5c8ee5 GM |
10046 | PRODUCE_GLYPHS (it); |
10047 | ||
10048 | it->current_x = saved_x; | |
10049 | it->object = saved_object; | |
10050 | it->position = saved_pos; | |
10051 | it->what = saved_what; | |
10052 | it->face_id = saved_face_id; | |
10053 | it->charset = saved_charset; | |
10054 | } | |
10055 | } | |
10056 | } | |
12adba34 | 10057 | |
1842fc1a | 10058 | |
5f5c8ee5 GM |
10059 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
10060 | to the end of the display line. Called from display_line. | |
10061 | If the glyph row is empty, add a space glyph to it so that we | |
10062 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
10063 | ||
10064 | static void | |
10065 | extend_face_to_end_of_line (it) | |
10066 | struct it *it; | |
10067 | { | |
10068 | struct face *face; | |
10069 | struct frame *f = it->f; | |
1842fc1a | 10070 | |
5f5c8ee5 GM |
10071 | /* If line is already filled, do nothing. */ |
10072 | if (it->current_x >= it->last_visible_x) | |
10073 | return; | |
10074 | ||
10075 | /* Face extension extends the background and box of IT->face_id | |
10076 | to the end of the line. If the background equals the background | |
10077 | of the frame, we haven't to do anything. */ | |
10078 | face = FACE_FROM_ID (f, it->face_id); | |
10079 | if (FRAME_WINDOW_P (f) | |
10080 | && face->box == FACE_NO_BOX | |
10081 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
10082 | && !face->stipple) | |
10083 | return; | |
1842fc1a | 10084 | |
5f5c8ee5 GM |
10085 | /* Set the glyph row flag indicating that the face of the last glyph |
10086 | in the text area has to be drawn to the end of the text area. */ | |
10087 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 10088 | |
5f5c8ee5 GM |
10089 | /* If current charset of IT is not ASCII, make sure we have the |
10090 | ASCII face. This will be automatically undone the next time | |
10091 | get_next_display_element returns a character from a different | |
10092 | charset. Note that the charset will always be ASCII in unibyte | |
10093 | text. */ | |
10094 | if (it->charset != CHARSET_ASCII) | |
10095 | { | |
10096 | it->charset = CHARSET_ASCII; | |
10097 | it->face_id = FACE_FOR_CHARSET (f, it->face_id, CHARSET_ASCII); | |
10098 | } | |
545e04f6 | 10099 | |
5f5c8ee5 GM |
10100 | if (FRAME_WINDOW_P (f)) |
10101 | { | |
10102 | /* If the row is empty, add a space with the current face of IT, | |
10103 | so that we know which face to draw. */ | |
10104 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 10105 | { |
5f5c8ee5 GM |
10106 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
10107 | it->glyph_row->glyphs[TEXT_AREA][0].u.ch.face_id = it->face_id; | |
10108 | it->glyph_row->used[TEXT_AREA] = 1; | |
a2889657 | 10109 | } |
5f5c8ee5 GM |
10110 | } |
10111 | else | |
10112 | { | |
10113 | /* Save some values that must not be changed. */ | |
10114 | int saved_x = it->current_x; | |
10115 | struct text_pos saved_pos; | |
10116 | Lisp_Object saved_object; | |
10117 | int saved_what = it->what; | |
10118 | ||
10119 | saved_object = it->object; | |
10120 | saved_pos = it->position; | |
10121 | ||
10122 | it->what = IT_CHARACTER; | |
10123 | bzero (&it->position, sizeof it->position); | |
10124 | it->object = 0; | |
10125 | it->c = ' '; | |
10126 | it->len = 1; | |
10127 | ||
10128 | PRODUCE_GLYPHS (it); | |
10129 | ||
10130 | while (it->current_x <= it->last_visible_x) | |
10131 | PRODUCE_GLYPHS (it); | |
10132 | ||
10133 | /* Don't count these blanks really. It would let us insert a left | |
10134 | truncation glyph below and make us set the cursor on them, maybe. */ | |
10135 | it->current_x = saved_x; | |
10136 | it->object = saved_object; | |
10137 | it->position = saved_pos; | |
10138 | it->what = saved_what; | |
10139 | } | |
10140 | } | |
12adba34 | 10141 | |
545e04f6 | 10142 | |
5f5c8ee5 GM |
10143 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
10144 | trailing whitespace. */ | |
1c9241f5 | 10145 | |
5f5c8ee5 GM |
10146 | static int |
10147 | trailing_whitespace_p (charpos) | |
10148 | int charpos; | |
10149 | { | |
10150 | int bytepos = CHAR_TO_BYTE (charpos); | |
10151 | int c = 0; | |
7bbe686f | 10152 | |
5f5c8ee5 GM |
10153 | while (bytepos < ZV_BYTE |
10154 | && (c = FETCH_CHAR (bytepos), | |
10155 | c == ' ' || c == '\t')) | |
10156 | ++bytepos; | |
0d09d1e6 | 10157 | |
5f5c8ee5 GM |
10158 | return bytepos >= ZV_BYTE || c == '\n' || c == '\r'; |
10159 | } | |
31b24551 | 10160 | |
545e04f6 | 10161 | |
5f5c8ee5 | 10162 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 10163 | |
5f5c8ee5 GM |
10164 | void |
10165 | highlight_trailing_whitespace (f, row) | |
10166 | struct frame *f; | |
10167 | struct glyph_row *row; | |
10168 | { | |
10169 | int used = row->used[TEXT_AREA]; | |
10170 | ||
10171 | if (used) | |
10172 | { | |
10173 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
10174 | struct glyph *glyph = start + used - 1; | |
10175 | ||
10176 | /* Skip over the space glyph inserted to display the | |
10177 | cursor at the end of a line. */ | |
10178 | if (glyph->type == CHAR_GLYPH | |
10179 | && glyph->u.ch.code == ' ' | |
10180 | && glyph->object == 0) | |
10181 | --glyph; | |
10182 | ||
10183 | /* If last glyph is a space or stretch, and it's trailing | |
10184 | whitespace, set the face of all trailing whitespace glyphs in | |
10185 | IT->glyph_row to `trailing-whitespace'. */ | |
10186 | if (glyph >= start | |
10187 | && BUFFERP (glyph->object) | |
10188 | && (glyph->type == STRETCH_GLYPH | |
10189 | || (glyph->type == CHAR_GLYPH | |
10190 | && glyph->u.ch.code == ' ')) | |
10191 | && trailing_whitespace_p (glyph->charpos)) | |
545e04f6 | 10192 | { |
5f5c8ee5 GM |
10193 | int face_id = lookup_named_face (f, Qtrailing_whitespace, |
10194 | CHARSET_ASCII); | |
10195 | ||
10196 | while (glyph >= start | |
10197 | && BUFFERP (glyph->object) | |
10198 | && (glyph->type == STRETCH_GLYPH | |
10199 | || (glyph->type == CHAR_GLYPH | |
10200 | && glyph->u.ch.code == ' '))) | |
545e04f6 | 10201 | { |
5f5c8ee5 GM |
10202 | if (glyph->type == STRETCH_GLYPH) |
10203 | glyph->u.stretch.face_id = face_id; | |
10204 | else | |
10205 | glyph->u.ch.face_id = face_id; | |
10206 | --glyph; | |
545e04f6 KH |
10207 | } |
10208 | } | |
a2889657 | 10209 | } |
5f5c8ee5 | 10210 | } |
a2889657 | 10211 | |
5fcbb24d | 10212 | |
a2889657 | 10213 | |
5f5c8ee5 GM |
10214 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
10215 | IT->w from text at the current position of IT. See dispextern.h | |
10216 | for an overview of struct it. Value is non-zero if | |
10217 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
10218 | only. */ | |
10219 | ||
10220 | static int | |
10221 | display_line (it) | |
10222 | struct it *it; | |
10223 | { | |
10224 | struct glyph_row *row = it->glyph_row; | |
10225 | ||
10226 | /* We always start displaying at hpos zero even if hscrolled. */ | |
10227 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 10228 | |
5f5c8ee5 GM |
10229 | /* We must not display in a row that's not a text row. */ |
10230 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
10231 | < it->w->desired_matrix->nrows); | |
12adba34 | 10232 | |
5f5c8ee5 GM |
10233 | /* Is IT->w showing the region? */ |
10234 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 10235 | |
5f5c8ee5 GM |
10236 | /* Clear the result glyph row and enable it. */ |
10237 | prepare_desired_row (row); | |
12adba34 | 10238 | |
5f5c8ee5 GM |
10239 | row->y = it->current_y; |
10240 | row->start = it->current; | |
10241 | row->continuation_lines_width = it->continuation_lines_width; | |
10242 | row->displays_text_p = 1; | |
10243 | ||
10244 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
10245 | display_line on only one line at a time, in which case this | |
10246 | can't really hurt too much, or we call it on lines which appear | |
10247 | one after another in the buffer, in which case all calls to | |
10248 | recenter_overlay_lists but the first will be pretty cheap. */ | |
10249 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
10250 | ||
10251 | #if NO_PROMPT_IN_BUFFER | |
10252 | /* Show mini-buffer prompt, if at the beginning of a mini-buffer | |
10253 | window. */ | |
10254 | if (MINI_WINDOW_P (it->w) | |
10255 | && MATRIX_ROW_START_CHARPOS (row) == BEG | |
10256 | && it->vpos == 0) | |
10257 | { | |
10258 | if (NILP (minibuf_prompt)) | |
10259 | minibuf_prompt_width = minibuf_prompt_pixel_width = 0; | |
a2889657 | 10260 | else |
a2889657 | 10261 | { |
5f5c8ee5 GM |
10262 | /* We would like to truncate the prompt a little bit before |
10263 | the right margin of the window, so that user input can | |
10264 | start on the first line. Set max_x to this position. */ | |
10265 | int max_x = (it->last_visible_x - 4 * CANON_X_UNIT (it->f)); | |
10266 | ||
10267 | /* We use a temporary iterator different from IT so that | |
10268 | IT's settings are not overwritten when displaying | |
10269 | the prompt. */ | |
10270 | struct it ti; | |
10271 | ||
10272 | ti = *it; | |
10273 | ||
10274 | /* Display the prompt. Set minibuf_prompt_width to the | |
10275 | number of glyphs generated for the prompt, set | |
10276 | minibuf_prompt_pixel_width to its width in pixels. */ | |
10277 | xassert (it->current_x == 0); | |
10278 | display_string (NULL, minibuf_prompt, Qnil, 0, 0, &ti, | |
10279 | 0, 0, max_x, -1); | |
10280 | minibuf_prompt_width = ti.hpos; | |
10281 | minibuf_prompt_pixel_width = ti.current_x; | |
10282 | ||
10283 | /* Transfer pixel and hpos information to IT. */ | |
10284 | it->hpos = ti.hpos; | |
10285 | it->current_x = ti.current_x; | |
10286 | } | |
10287 | } | |
10288 | #endif /* NO_PROMPT_IN_BUFFER */ | |
10289 | ||
10290 | /* Move over display elements that are not visible because we are | |
10291 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
10292 | if the first glyph is partially visible or if we hit a line end. */ | |
10293 | if (it->current_x < it->first_visible_x) | |
10294 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
10295 | MOVE_TO_POS | MOVE_TO_X); | |
10296 | ||
10297 | /* Get the initial row height. This is either the height of the | |
10298 | text hscrolled, if there is any, or zero. */ | |
10299 | row->ascent = it->max_ascent; | |
10300 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10301 | row->phys_ascent = it->max_phys_ascent; |
10302 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10303 | |
10304 | /* Loop generating characters. The loop is left with IT on the next | |
10305 | character to display. */ | |
10306 | while (1) | |
10307 | { | |
10308 | int n_glyphs_before, hpos_before, x_before; | |
10309 | int x, i, nglyphs; | |
10310 | ||
10311 | /* Retrieve the next thing to display. Value is zero if end of | |
10312 | buffer reached. */ | |
10313 | if (!get_next_display_element (it)) | |
10314 | { | |
10315 | /* Maybe add a space at the end of this line that is used to | |
10316 | display the cursor there under X. */ | |
10317 | append_space (it, 1); | |
10318 | ||
10319 | /* The position -1 below indicates a blank line not | |
10320 | corresponding to any text, as opposed to an empty line | |
10321 | corresponding to a line end. */ | |
10322 | if (row->used[TEXT_AREA] <= 1) | |
a2889657 | 10323 | { |
5f5c8ee5 GM |
10324 | row->glyphs[TEXT_AREA]->charpos = -1; |
10325 | row->displays_text_p = 0; | |
10326 | ||
10327 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
10328 | row->indicate_empty_line_p = 1; | |
a2889657 | 10329 | } |
5f5c8ee5 GM |
10330 | |
10331 | it->continuation_lines_width = 0; | |
10332 | row->ends_at_zv_p = 1; | |
10333 | break; | |
a2889657 | 10334 | } |
a2889657 | 10335 | |
5f5c8ee5 GM |
10336 | /* Now, get the metrics of what we want to display. This also |
10337 | generates glyphs in `row' (which is IT->glyph_row). */ | |
10338 | n_glyphs_before = row->used[TEXT_AREA]; | |
10339 | x = it->current_x; | |
10340 | PRODUCE_GLYPHS (it); | |
a2889657 | 10341 | |
5f5c8ee5 GM |
10342 | /* If this display element was in marginal areas, continue with |
10343 | the next one. */ | |
10344 | if (it->area != TEXT_AREA) | |
a2889657 | 10345 | { |
5f5c8ee5 GM |
10346 | row->ascent = max (row->ascent, it->max_ascent); |
10347 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10348 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10349 | row->phys_height = max (row->phys_height, | |
10350 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10351 | set_iterator_to_next (it); |
10352 | continue; | |
10353 | } | |
5936754e | 10354 | |
5f5c8ee5 GM |
10355 | /* Does the display element fit on the line? If we truncate |
10356 | lines, we should draw past the right edge of the window. If | |
10357 | we don't truncate, we want to stop so that we can display the | |
10358 | continuation glyph before the right margin. If lines are | |
10359 | continued, there are two possible strategies for characters | |
10360 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
10361 | glyphs as possible in this line and leave the rest for the | |
10362 | continuation line, or display the whole element in the next | |
10363 | line. Original redisplay did the former, so we do it also. */ | |
10364 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
10365 | hpos_before = it->hpos; | |
10366 | x_before = x; | |
10367 | ||
10368 | if (nglyphs == 1 | |
10369 | && it->current_x < it->last_visible_x) | |
10370 | { | |
10371 | ++it->hpos; | |
10372 | row->ascent = max (row->ascent, it->max_ascent); | |
10373 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10374 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10375 | row->phys_height = max (row->phys_height, | |
10376 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10377 | if (it->current_x - it->pixel_width < it->first_visible_x) |
10378 | row->x = x - it->first_visible_x; | |
10379 | } | |
10380 | else | |
10381 | { | |
10382 | int new_x; | |
10383 | struct glyph *glyph; | |
10384 | ||
10385 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 10386 | { |
5f5c8ee5 GM |
10387 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
10388 | new_x = x + glyph->pixel_width; | |
10389 | ||
10390 | if (/* Lines are continued. */ | |
10391 | !it->truncate_lines_p | |
10392 | && (/* Glyph doesn't fit on the line. */ | |
10393 | new_x > it->last_visible_x | |
10394 | /* Or it fits exactly on a window system frame. */ | |
10395 | || (new_x == it->last_visible_x | |
10396 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 10397 | { |
5f5c8ee5 GM |
10398 | /* End of a continued line. */ |
10399 | ||
10400 | if (it->hpos == 0 | |
10401 | || (new_x == it->last_visible_x | |
10402 | && FRAME_WINDOW_P (it->f))) | |
10403 | { | |
10404 | /* Current glyph fits exactly on the line. We | |
10405 | must continue the line because we can't draw | |
10406 | the cursor after the glyph. */ | |
10407 | row->continued_p = 1; | |
10408 | it->current_x = new_x; | |
10409 | it->continuation_lines_width += new_x; | |
10410 | ++it->hpos; | |
10411 | if (i == nglyphs - 1) | |
10412 | set_iterator_to_next (it); | |
10413 | } | |
10414 | else | |
5936754e | 10415 | { |
5f5c8ee5 GM |
10416 | /* Display element draws past the right edge of |
10417 | the window. Restore positions to values | |
10418 | before the element. The next line starts | |
10419 | with current_x before the glyph that could | |
10420 | not be displayed, so that TAB works right. */ | |
10421 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
10422 | ||
10423 | /* Display continuation glyphs. */ | |
10424 | if (!FRAME_WINDOW_P (it->f)) | |
10425 | produce_special_glyphs (it, IT_CONTINUATION); | |
10426 | row->continued_p = 1; | |
10427 | ||
10428 | it->current_x = x; | |
10429 | it->continuation_lines_width += x; | |
5936754e | 10430 | } |
5f5c8ee5 GM |
10431 | break; |
10432 | } | |
10433 | else if (new_x > it->first_visible_x) | |
10434 | { | |
10435 | /* Increment number of glyphs actually displayed. */ | |
10436 | ++it->hpos; | |
10437 | ||
10438 | if (x < it->first_visible_x) | |
10439 | /* Glyph is partially visible, i.e. row starts at | |
10440 | negative X position. */ | |
10441 | row->x = x - it->first_visible_x; | |
10442 | } | |
10443 | else | |
10444 | { | |
10445 | /* Glyph is completely off the left margin of the | |
10446 | window. This should not happen because of the | |
10447 | move_it_in_display_line at the start of | |
10448 | this function. */ | |
10449 | abort (); | |
a2889657 | 10450 | } |
a2889657 | 10451 | } |
5f5c8ee5 GM |
10452 | |
10453 | row->ascent = max (row->ascent, it->max_ascent); | |
10454 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10455 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10456 | row->phys_height = max (row->phys_height, | |
10457 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10458 | |
10459 | /* End of this display line if row is continued. */ | |
10460 | if (row->continued_p) | |
10461 | break; | |
a2889657 | 10462 | } |
a2889657 | 10463 | |
5f5c8ee5 GM |
10464 | /* Is this a line end? If yes, we're also done, after making |
10465 | sure that a non-default face is extended up to the right | |
10466 | margin of the window. */ | |
10467 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 10468 | { |
5f5c8ee5 GM |
10469 | int used_before = row->used[TEXT_AREA]; |
10470 | ||
10471 | /* Add a space at the end of the line that is used to | |
10472 | display the cursor there. */ | |
10473 | append_space (it, 0); | |
10474 | ||
10475 | /* Extend the face to the end of the line. */ | |
10476 | extend_face_to_end_of_line (it); | |
10477 | ||
10478 | /* Make sure we have the position. */ | |
10479 | if (used_before == 0) | |
10480 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
10481 | ||
10482 | /* Consume the line end. This skips over invisible lines. */ | |
10483 | set_iterator_to_next (it); | |
10484 | it->continuation_lines_width = 0; | |
10485 | break; | |
1c9241f5 | 10486 | } |
a2889657 | 10487 | |
5f5c8ee5 GM |
10488 | /* Proceed with next display element. Note that this skips |
10489 | over lines invisible because of selective display. */ | |
10490 | set_iterator_to_next (it); | |
b1d1124b | 10491 | |
5f5c8ee5 GM |
10492 | /* If we truncate lines, we are done when the last displayed |
10493 | glyphs reach past the right margin of the window. */ | |
10494 | if (it->truncate_lines_p | |
10495 | && (FRAME_WINDOW_P (it->f) | |
10496 | ? (it->current_x >= it->last_visible_x) | |
10497 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 10498 | { |
5f5c8ee5 GM |
10499 | /* Maybe add truncation glyphs. */ |
10500 | if (!FRAME_WINDOW_P (it->f)) | |
10501 | { | |
10502 | --it->glyph_row->used[TEXT_AREA]; | |
10503 | produce_special_glyphs (it, IT_TRUNCATION); | |
10504 | } | |
10505 | ||
10506 | row->truncated_on_right_p = 1; | |
10507 | it->continuation_lines_width = 0; | |
312246d1 | 10508 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
10509 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
10510 | it->hpos = hpos_before; | |
10511 | it->current_x = x_before; | |
10512 | break; | |
75d13c64 | 10513 | } |
a2889657 | 10514 | } |
a2889657 | 10515 | |
5f5c8ee5 GM |
10516 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
10517 | at the left window margin. */ | |
10518 | if (it->first_visible_x | |
10519 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
10520 | { | |
10521 | if (!FRAME_WINDOW_P (it->f)) | |
10522 | insert_left_trunc_glyphs (it); | |
10523 | row->truncated_on_left_p = 1; | |
10524 | } | |
a2889657 | 10525 | |
5f5c8ee5 GM |
10526 | /* If the start of this line is the overlay arrow-position, then |
10527 | mark this glyph row as the one containing the overlay arrow. | |
10528 | This is clearly a mess with variable size fonts. It would be | |
10529 | better to let it be displayed like cursors under X. */ | |
e24c997d | 10530 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 10531 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
10532 | && (MATRIX_ROW_START_CHARPOS (row) |
10533 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 10534 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
10535 | && ! overlay_arrow_seen) |
10536 | { | |
5f5c8ee5 GM |
10537 | /* Overlay arrow in window redisplay is a bitmap. */ |
10538 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 10539 | { |
5f5c8ee5 GM |
10540 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
10541 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
10542 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
10543 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
10544 | struct glyph *p2, *end; | |
10545 | ||
10546 | /* Copy the arrow glyphs. */ | |
10547 | while (glyph < arrow_end) | |
10548 | *p++ = *glyph++; | |
10549 | ||
10550 | /* Throw away padding glyphs. */ | |
10551 | p2 = p; | |
10552 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
10553 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
10554 | ++p2; | |
10555 | if (p2 > p) | |
212e4f87 | 10556 | { |
5f5c8ee5 GM |
10557 | while (p2 < end) |
10558 | *p++ = *p2++; | |
10559 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 10560 | } |
c4628384 | 10561 | } |
5f5c8ee5 | 10562 | |
a2889657 | 10563 | overlay_arrow_seen = 1; |
5f5c8ee5 | 10564 | row->overlay_arrow_p = 1; |
a2889657 JB |
10565 | } |
10566 | ||
5f5c8ee5 GM |
10567 | /* Compute pixel dimensions of this line. */ |
10568 | compute_line_metrics (it); | |
10569 | ||
10570 | /* Remember the position at which this line ends. */ | |
10571 | row->end = it->current; | |
10572 | ||
10573 | /* Maybe set the cursor. If you change this, it's probably a good | |
10574 | idea to also change the code in redisplay_window for cursor | |
10575 | movement in an unchanged window. */ | |
10576 | if (it->w->cursor.vpos < 0 | |
10577 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
10578 | && MATRIX_ROW_END_CHARPOS (row) >= PT | |
10579 | && !(MATRIX_ROW_END_CHARPOS (row) == PT | |
10580 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
10581 | || !row->ends_at_zv_p))) | |
10582 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
10583 | ||
10584 | /* Highlight trailing whitespace. */ | |
10585 | if (it->show_trailing_whitespace_p) | |
10586 | highlight_trailing_whitespace (it->f, it->glyph_row); | |
10587 | ||
10588 | /* Prepare for the next line. This line starts horizontally at (X | |
10589 | HPOS) = (0 0). Vertical positions are incremented. As a | |
10590 | convenience for the caller, IT->glyph_row is set to the next | |
10591 | row to be used. */ | |
10592 | it->current_x = it->hpos = 0; | |
10593 | it->current_y += row->height; | |
10594 | ++it->vpos; | |
10595 | ++it->glyph_row; | |
10596 | return row->displays_text_p; | |
a2889657 | 10597 | } |
5f5c8ee5 GM |
10598 | |
10599 | ||
a2889657 | 10600 | \f |
5f5c8ee5 GM |
10601 | /*********************************************************************** |
10602 | Menu Bar | |
10603 | ***********************************************************************/ | |
10604 | ||
10605 | /* Redisplay the menu bar in the frame for window W. | |
10606 | ||
10607 | The menu bar of X frames that don't have X toolkit support is | |
10608 | displayed in a special window W->frame->menu_bar_window. | |
10609 | ||
10610 | The menu bar of terminal frames is treated specially as far as | |
10611 | glyph matrices are concerned. Menu bar lines are not part of | |
10612 | windows, so the update is done directly on the frame matrix rows | |
10613 | for the menu bar. */ | |
7ce2c095 RS |
10614 | |
10615 | static void | |
10616 | display_menu_bar (w) | |
10617 | struct window *w; | |
10618 | { | |
5f5c8ee5 GM |
10619 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
10620 | struct it it; | |
10621 | Lisp_Object items; | |
8351baf2 | 10622 | int i; |
7ce2c095 | 10623 | |
5f5c8ee5 | 10624 | /* Don't do all this for graphical frames. */ |
dc937613 | 10625 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
10626 | if (!NILP (Vwindow_system)) |
10627 | return; | |
dc937613 | 10628 | #endif |
dc937613 | 10629 | #ifdef USE_X_TOOLKIT |
d3413a53 | 10630 | if (FRAME_X_P (f)) |
7ce2c095 | 10631 | return; |
5f5c8ee5 GM |
10632 | #endif |
10633 | ||
10634 | #ifdef USE_X_TOOLKIT | |
10635 | xassert (!FRAME_WINDOW_P (f)); | |
10636 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MODE_LINE_FACE_ID); | |
10637 | it.first_visible_x = 0; | |
10638 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
10639 | #else /* not USE_X_TOOLKIT */ | |
10640 | if (FRAME_WINDOW_P (f)) | |
10641 | { | |
10642 | /* Menu bar lines are displayed in the desired matrix of the | |
10643 | dummy window menu_bar_window. */ | |
10644 | struct window *menu_w; | |
10645 | xassert (WINDOWP (f->menu_bar_window)); | |
10646 | menu_w = XWINDOW (f->menu_bar_window); | |
10647 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
10648 | MODE_LINE_FACE_ID); | |
10649 | it.first_visible_x = 0; | |
10650 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
10651 | } | |
10652 | else | |
10653 | { | |
10654 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
10655 | pixel x/y. */ | |
10656 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
10657 | MODE_LINE_FACE_ID); | |
10658 | it.first_visible_x = 0; | |
10659 | it.last_visible_x = FRAME_WIDTH (f); | |
10660 | } | |
10661 | #endif /* not USE_X_TOOLKIT */ | |
10662 | ||
10663 | /* Clear all rows of the menu bar. */ | |
10664 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
10665 | { | |
10666 | struct glyph_row *row = it.glyph_row + i; | |
10667 | clear_glyph_row (row); | |
10668 | row->enabled_p = 1; | |
10669 | row->full_width_p = 1; | |
10670 | } | |
7ce2c095 | 10671 | |
5f5c8ee5 GM |
10672 | /* Make the first line of the menu bar appear in reverse video. */ |
10673 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 10674 | |
5f5c8ee5 GM |
10675 | /* Display all items of the menu bar. */ |
10676 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 10677 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 10678 | { |
5f5c8ee5 GM |
10679 | Lisp_Object string; |
10680 | ||
10681 | /* Stop at nil string. */ | |
8351baf2 RS |
10682 | string = XVECTOR (items)->contents[i + 1]; |
10683 | if (NILP (string)) | |
10684 | break; | |
2d66ad19 | 10685 | |
5f5c8ee5 GM |
10686 | /* Remember where item was displayed. */ |
10687 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 10688 | |
5f5c8ee5 GM |
10689 | /* Display the item, pad with one space. */ |
10690 | if (it.current_x < it.last_visible_x) | |
10691 | display_string (NULL, string, Qnil, 0, 0, &it, | |
10692 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
10693 | } |
10694 | ||
2d66ad19 | 10695 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
10696 | if (it.current_x < it.last_visible_x) |
10697 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 10698 | |
5f5c8ee5 GM |
10699 | /* Compute the total height of the lines. */ |
10700 | compute_line_metrics (&it); | |
7ce2c095 | 10701 | } |
5f5c8ee5 GM |
10702 | |
10703 | ||
7ce2c095 | 10704 | \f |
5f5c8ee5 GM |
10705 | /*********************************************************************** |
10706 | Mode Line | |
10707 | ***********************************************************************/ | |
10708 | ||
10709 | /* Display the mode and/or top line of window W. */ | |
a2889657 JB |
10710 | |
10711 | static void | |
5f5c8ee5 | 10712 | display_mode_lines (w) |
a2889657 JB |
10713 | struct window *w; |
10714 | { | |
5f5c8ee5 | 10715 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 10716 | line_number_displayed = 0; |
155ef550 | 10717 | w->column_number_displayed = Qnil; |
aa6d10fa | 10718 | |
5f5c8ee5 GM |
10719 | if (WINDOW_WANTS_MODELINE_P (w)) |
10720 | display_mode_line (w, MODE_LINE_FACE_ID, current_buffer->mode_line_format); | |
10721 | ||
10722 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
10723 | display_mode_line (w, TOP_LINE_FACE_ID, current_buffer->top_line_format); | |
10724 | } | |
03b294dc | 10725 | |
03b294dc | 10726 | |
5f5c8ee5 GM |
10727 | /* Display mode or top line of window W. FACE_ID specifies which line |
10728 | to display; it is either MODE_LINE_FACE_ID or TOP_LINE_FACE_ID. | |
10729 | FORMAT is the mode line format to display. */ | |
03b294dc | 10730 | |
5f5c8ee5 GM |
10731 | static void |
10732 | display_mode_line (w, face_id, format) | |
10733 | struct window *w; | |
10734 | enum face_id face_id; | |
10735 | Lisp_Object format; | |
10736 | { | |
10737 | struct it it; | |
10738 | struct face *face; | |
03b294dc | 10739 | |
5f5c8ee5 GM |
10740 | init_iterator (&it, w, -1, -1, NULL, face_id); |
10741 | prepare_desired_row (it.glyph_row); | |
10742 | ||
10743 | /* Temporarily make frame's keyboard the current kboard so that | |
10744 | kboard-local variables in the mode_line_format will get the right | |
10745 | values. */ | |
10746 | push_frame_kboard (it.f); | |
10747 | display_mode_element (&it, 0, 0, 0, format); | |
10748 | pop_frame_kboard (); | |
a2889657 | 10749 | |
5f5c8ee5 GM |
10750 | /* Fill up with spaces. */ |
10751 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
10752 | ||
10753 | compute_line_metrics (&it); | |
10754 | it.glyph_row->full_width_p = 1; | |
10755 | it.glyph_row->mode_line_p = 1; | |
10756 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
10757 | it.glyph_row->continued_p = 0; | |
10758 | it.glyph_row->truncated_on_left_p = 0; | |
10759 | it.glyph_row->truncated_on_right_p = 0; | |
10760 | ||
10761 | /* Make a 3D mode-line have a shadow at its right end. */ | |
10762 | face = FACE_FROM_ID (it.f, face_id); | |
10763 | extend_face_to_end_of_line (&it); | |
10764 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 10765 | { |
5f5c8ee5 GM |
10766 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
10767 | + it.glyph_row->used[TEXT_AREA] - 1); | |
10768 | last->right_box_line_p = 1; | |
d7eb09a0 | 10769 | } |
a2889657 JB |
10770 | } |
10771 | ||
a2889657 | 10772 | |
5f5c8ee5 GM |
10773 | /* Contribute ELT to the mode line for window IT->w. How it |
10774 | translates into text depends on its data type. | |
a2889657 | 10775 | |
5f5c8ee5 | 10776 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
10777 | |
10778 | DEPTH is the depth in recursion. It is used to prevent | |
10779 | infinite recursion here. | |
10780 | ||
5f5c8ee5 GM |
10781 | FIELD_WIDTH is the number of characters the display of ELT should |
10782 | occupy in the mode line, and PRECISION is the maximum number of | |
10783 | characters to display from ELT's representation. See | |
10784 | display_string for details. * | |
a2889657 | 10785 | |
5f5c8ee5 | 10786 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
10787 | |
10788 | static int | |
5f5c8ee5 GM |
10789 | display_mode_element (it, depth, field_width, precision, elt) |
10790 | struct it *it; | |
a2889657 | 10791 | int depth; |
5f5c8ee5 GM |
10792 | int field_width, precision; |
10793 | Lisp_Object elt; | |
a2889657 | 10794 | { |
5f5c8ee5 GM |
10795 | int n = 0, field, prec; |
10796 | ||
a2889657 JB |
10797 | tail_recurse: |
10798 | if (depth > 10) | |
10799 | goto invalid; | |
10800 | ||
10801 | depth++; | |
10802 | ||
0220c518 | 10803 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
10804 | { |
10805 | case Lisp_String: | |
10806 | { | |
10807 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
10808 | unsigned char c; |
10809 | unsigned char *this = XSTRING (elt)->data; | |
10810 | unsigned char *lisp_string = this; | |
10811 | ||
10812 | while ((precision <= 0 || n < precision) | |
10813 | && *this | |
10814 | && (frame_title_ptr | |
10815 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
10816 | { |
10817 | unsigned char *last = this; | |
5f5c8ee5 GM |
10818 | |
10819 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
10820 | while ((c = *this++) != '\0' && c != '%') |
10821 | ; | |
5f5c8ee5 | 10822 | |
a2889657 JB |
10823 | if (this - 1 != last) |
10824 | { | |
5f5c8ee5 GM |
10825 | /* Output to end of string or up to '%'. Field width |
10826 | is length of string. Don't output more than | |
10827 | PRECISION allows us. */ | |
10828 | prec = --this - last; | |
10829 | if (precision > 0 && prec > precision - n) | |
10830 | prec = precision - n; | |
10831 | ||
d39b6696 | 10832 | if (frame_title_ptr) |
5f5c8ee5 | 10833 | n += store_frame_title (last, prec, prec); |
d39b6696 | 10834 | else |
5f5c8ee5 GM |
10835 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
10836 | it, 0, prec, 0, -1); | |
a2889657 JB |
10837 | } |
10838 | else /* c == '%' */ | |
10839 | { | |
5f5c8ee5 GM |
10840 | unsigned char *percent_position = this; |
10841 | ||
10842 | /* Get the specified minimum width. Zero means | |
10843 | don't pad. */ | |
10844 | field = 0; | |
a2889657 | 10845 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 10846 | field = field * 10 + c - '0'; |
a2889657 | 10847 | |
5f5c8ee5 GM |
10848 | /* Don't pad beyond the total padding allowed. */ |
10849 | if (field_width - n > 0 && field > field_width - n) | |
10850 | field = field_width - n; | |
a2889657 | 10851 | |
5f5c8ee5 GM |
10852 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
10853 | prec = precision - n; | |
10854 | ||
a2889657 | 10855 | if (c == 'M') |
5f5c8ee5 GM |
10856 | n += display_mode_element (it, depth, field, prec, |
10857 | Vglobal_mode_string); | |
a2889657 | 10858 | else if (c != 0) |
d39b6696 | 10859 | { |
5f5c8ee5 GM |
10860 | unsigned char *spec |
10861 | = decode_mode_spec (it->w, c, field, prec); | |
10862 | ||
d39b6696 | 10863 | if (frame_title_ptr) |
5f5c8ee5 | 10864 | n += store_frame_title (spec, field, prec); |
d39b6696 | 10865 | else |
5f5c8ee5 GM |
10866 | { |
10867 | int nglyphs_before | |
10868 | = it->glyph_row->used[TEXT_AREA]; | |
10869 | int charpos | |
10870 | = percent_position - XSTRING (elt)->data; | |
10871 | int nwritten | |
10872 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
10873 | field, prec, 0, -1); | |
10874 | ||
10875 | /* Assign to the glyphs written above the | |
10876 | string where the `%x' came from, position | |
10877 | of the `%'. */ | |
10878 | if (nwritten > 0) | |
10879 | { | |
10880 | struct glyph *glyph | |
10881 | = (it->glyph_row->glyphs[TEXT_AREA] | |
10882 | + nglyphs_before); | |
10883 | int i; | |
10884 | ||
10885 | for (i = 0; i < nwritten; ++i) | |
10886 | { | |
10887 | glyph[i].object = elt; | |
10888 | glyph[i].charpos = charpos; | |
10889 | } | |
10890 | ||
10891 | n += nwritten; | |
10892 | } | |
10893 | } | |
d39b6696 | 10894 | } |
a2889657 JB |
10895 | } |
10896 | } | |
10897 | } | |
10898 | break; | |
10899 | ||
10900 | case Lisp_Symbol: | |
10901 | /* A symbol: process the value of the symbol recursively | |
10902 | as if it appeared here directly. Avoid error if symbol void. | |
10903 | Special case: if value of symbol is a string, output the string | |
10904 | literally. */ | |
10905 | { | |
10906 | register Lisp_Object tem; | |
10907 | tem = Fboundp (elt); | |
265a9e55 | 10908 | if (!NILP (tem)) |
a2889657 JB |
10909 | { |
10910 | tem = Fsymbol_value (elt); | |
10911 | /* If value is a string, output that string literally: | |
10912 | don't check for % within it. */ | |
e24c997d | 10913 | if (STRINGP (tem)) |
d39b6696 | 10914 | { |
5f5c8ee5 GM |
10915 | prec = XSTRING (tem)->size; |
10916 | if (precision > 0 && prec > precision - n) | |
10917 | prec = precision - n; | |
d39b6696 | 10918 | if (frame_title_ptr) |
5f5c8ee5 | 10919 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 10920 | else |
5f5c8ee5 GM |
10921 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
10922 | 0, prec, 0, -1); | |
d39b6696 | 10923 | } |
a2889657 | 10924 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
10925 | { |
10926 | /* Give up right away for nil or t. */ | |
10927 | elt = tem; | |
10928 | goto tail_recurse; | |
10929 | } | |
a2889657 JB |
10930 | } |
10931 | } | |
10932 | break; | |
10933 | ||
10934 | case Lisp_Cons: | |
10935 | { | |
10936 | register Lisp_Object car, tem; | |
10937 | ||
10938 | /* A cons cell: three distinct cases. | |
10939 | If first element is a string or a cons, process all the elements | |
10940 | and effectively concatenate them. | |
10941 | If first element is a negative number, truncate displaying cdr to | |
10942 | at most that many characters. If positive, pad (with spaces) | |
10943 | to at least that many characters. | |
10944 | If first element is a symbol, process the cadr or caddr recursively | |
10945 | according to whether the symbol's value is non-nil or nil. */ | |
10946 | car = XCONS (elt)->car; | |
5f5c8ee5 GM |
10947 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
10948 | { | |
10949 | /* An element of the form (:eval FORM) means evaluate FORM | |
10950 | and use the result as mode line elements. */ | |
10951 | struct gcpro gcpro1; | |
10952 | Lisp_Object spec; | |
10953 | ||
10954 | spec = eval_form (XCAR (XCDR (elt))); | |
10955 | GCPRO1 (spec); | |
10956 | n += display_mode_element (it, depth, field_width - n, | |
10957 | precision - n, spec); | |
10958 | UNGCPRO; | |
10959 | } | |
10960 | else if (SYMBOLP (car)) | |
a2889657 JB |
10961 | { |
10962 | tem = Fboundp (car); | |
10963 | elt = XCONS (elt)->cdr; | |
e24c997d | 10964 | if (!CONSP (elt)) |
a2889657 JB |
10965 | goto invalid; |
10966 | /* elt is now the cdr, and we know it is a cons cell. | |
10967 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 10968 | if (!NILP (tem)) |
a2889657 JB |
10969 | { |
10970 | tem = Fsymbol_value (car); | |
265a9e55 | 10971 | if (!NILP (tem)) |
a2889657 JB |
10972 | { elt = XCONS (elt)->car; goto tail_recurse; } |
10973 | } | |
10974 | /* Symbol's value is nil (or symbol is unbound) | |
10975 | Get the cddr of the original list | |
10976 | and if possible find the caddr and use that. */ | |
10977 | elt = XCONS (elt)->cdr; | |
265a9e55 | 10978 | if (NILP (elt)) |
a2889657 | 10979 | break; |
e24c997d | 10980 | else if (!CONSP (elt)) |
a2889657 JB |
10981 | goto invalid; |
10982 | elt = XCONS (elt)->car; | |
10983 | goto tail_recurse; | |
10984 | } | |
e24c997d | 10985 | else if (INTEGERP (car)) |
a2889657 JB |
10986 | { |
10987 | register int lim = XINT (car); | |
10988 | elt = XCONS (elt)->cdr; | |
10989 | if (lim < 0) | |
5f5c8ee5 GM |
10990 | { |
10991 | /* Negative int means reduce maximum width. */ | |
10992 | if (precision <= 0) | |
10993 | precision = -lim; | |
10994 | else | |
10995 | precision = min (precision, -lim); | |
10996 | } | |
a2889657 JB |
10997 | else if (lim > 0) |
10998 | { | |
10999 | /* Padding specified. Don't let it be more than | |
11000 | current maximum. */ | |
5f5c8ee5 GM |
11001 | if (precision > 0) |
11002 | lim = min (precision, lim); | |
11003 | ||
a2889657 JB |
11004 | /* If that's more padding than already wanted, queue it. |
11005 | But don't reduce padding already specified even if | |
11006 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 11007 | field_width = max (lim, field_width); |
a2889657 JB |
11008 | } |
11009 | goto tail_recurse; | |
11010 | } | |
e24c997d | 11011 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
11012 | { |
11013 | register int limit = 50; | |
5f5c8ee5 GM |
11014 | /* Limit is to protect against circular lists. */ |
11015 | while (CONSP (elt) | |
11016 | && --limit > 0 | |
11017 | && (precision <= 0 || n < precision)) | |
a2889657 | 11018 | { |
5f5c8ee5 GM |
11019 | n += display_mode_element (it, depth, field_width - n, |
11020 | precision - n, XCONS (elt)->car); | |
a2889657 JB |
11021 | elt = XCONS (elt)->cdr; |
11022 | } | |
11023 | } | |
11024 | } | |
11025 | break; | |
11026 | ||
11027 | default: | |
11028 | invalid: | |
d39b6696 | 11029 | if (frame_title_ptr) |
5f5c8ee5 | 11030 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 11031 | else |
5f5c8ee5 GM |
11032 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
11033 | precision - n, 0, 0); | |
11034 | return n; | |
a2889657 JB |
11035 | } |
11036 | ||
5f5c8ee5 GM |
11037 | /* Pad to FIELD_WIDTH. */ |
11038 | if (field_width > 0 && n < field_width) | |
11039 | { | |
11040 | if (frame_title_ptr) | |
11041 | n += store_frame_title ("", field_width - n, 0); | |
11042 | else | |
11043 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
11044 | 0, 0, 0); | |
11045 | } | |
11046 | ||
11047 | return n; | |
a2889657 | 11048 | } |
5f5c8ee5 GM |
11049 | |
11050 | ||
766525bc RS |
11051 | /* Write a null-terminated, right justified decimal representation of |
11052 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
11053 | ||
11054 | static void | |
11055 | pint2str (buf, width, d) | |
11056 | register char *buf; | |
11057 | register int width; | |
11058 | register int d; | |
11059 | { | |
11060 | register char *p = buf; | |
11061 | ||
11062 | if (d <= 0) | |
5f5c8ee5 | 11063 | *p++ = '0'; |
766525bc | 11064 | else |
5f5c8ee5 | 11065 | { |
766525bc | 11066 | while (d > 0) |
5f5c8ee5 | 11067 | { |
766525bc RS |
11068 | *p++ = d % 10 + '0'; |
11069 | d /= 10; | |
5f5c8ee5 GM |
11070 | } |
11071 | } | |
11072 | ||
11073 | for (width -= (int) (p - buf); width > 0; --width) | |
11074 | *p++ = ' '; | |
766525bc RS |
11075 | *p-- = '\0'; |
11076 | while (p > buf) | |
5f5c8ee5 | 11077 | { |
766525bc RS |
11078 | d = *buf; |
11079 | *buf++ = *p; | |
11080 | *p-- = d; | |
5f5c8ee5 | 11081 | } |
766525bc RS |
11082 | } |
11083 | ||
5f5c8ee5 | 11084 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
11085 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
11086 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
11087 | ||
6693a99a | 11088 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 11089 | |
1c9241f5 KH |
11090 | static char * |
11091 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
11092 | Lisp_Object coding_system; | |
11093 | register char *buf; | |
11094 | int eol_flag; | |
11095 | { | |
1e1078d6 | 11096 | Lisp_Object val; |
916848d8 | 11097 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
11098 | unsigned char *eol_str; |
11099 | int eol_str_len; | |
11100 | /* The EOL conversion we are using. */ | |
11101 | Lisp_Object eoltype; | |
1e1078d6 RS |
11102 | |
11103 | val = coding_system; | |
1c9241f5 KH |
11104 | |
11105 | if (NILP (val)) /* Not yet decided. */ | |
11106 | { | |
916848d8 RS |
11107 | if (multibyte) |
11108 | *buf++ = '-'; | |
21e989e3 | 11109 | if (eol_flag) |
302f2b38 | 11110 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 11111 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
11112 | } |
11113 | else | |
11114 | { | |
1e1078d6 RS |
11115 | Lisp_Object eolvalue; |
11116 | ||
11117 | eolvalue = Fget (coding_system, Qeol_type); | |
11118 | ||
1c9241f5 | 11119 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
11120 | { |
11121 | val = Fget (val, Qcoding_system); | |
11122 | if (NILP (eolvalue)) | |
b070c1d7 | 11123 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
11124 | } |
11125 | ||
916848d8 RS |
11126 | if (multibyte) |
11127 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
11128 | ||
1c9241f5 KH |
11129 | if (eol_flag) |
11130 | { | |
1e1078d6 RS |
11131 | /* The EOL conversion that is normal on this system. */ |
11132 | ||
11133 | if (NILP (eolvalue)) /* Not yet decided. */ | |
11134 | eoltype = eol_mnemonic_undecided; | |
11135 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
11136 | eoltype = eol_mnemonic_undecided; | |
11137 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
11138 | eoltype = (XFASTINT (eolvalue) == 0 | |
11139 | ? eol_mnemonic_unix | |
11140 | : (XFASTINT (eolvalue) == 1 | |
11141 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
11142 | } |
11143 | } | |
5f5c8ee5 | 11144 | |
302f2b38 EZ |
11145 | if (eol_flag) |
11146 | { | |
11147 | /* Mention the EOL conversion if it is not the usual one. */ | |
11148 | if (STRINGP (eoltype)) | |
11149 | { | |
11150 | eol_str = XSTRING (eoltype)->data; | |
11151 | eol_str_len = XSTRING (eoltype)->size; | |
11152 | } | |
f30b3499 KH |
11153 | else if (INTEGERP (eoltype) |
11154 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
11155 | { | |
11156 | int c = XINT (eoltype); | |
11157 | unsigned char work[4]; | |
11158 | ||
11159 | eol_str_len = CHAR_STRING (XINT (eoltype), work, eol_str); | |
11160 | } | |
302f2b38 EZ |
11161 | else |
11162 | { | |
11163 | eol_str = invalid_eol_type; | |
11164 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 11165 | } |
f30b3499 | 11166 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 11167 | buf += eol_str_len; |
1c9241f5 | 11168 | } |
302f2b38 | 11169 | |
1c9241f5 KH |
11170 | return buf; |
11171 | } | |
11172 | ||
a2889657 | 11173 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
11174 | generated by character C. PRECISION >= 0 means don't return a |
11175 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
11176 | string returned with spaces to that value. */ | |
a2889657 | 11177 | |
11e82b76 JB |
11178 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
11179 | ||
a2889657 | 11180 | static char * |
5f5c8ee5 | 11181 | decode_mode_spec (w, c, field_width, precision) |
a2889657 JB |
11182 | struct window *w; |
11183 | register char c; | |
5f5c8ee5 | 11184 | int field_width, precision; |
a2889657 | 11185 | { |
0b67772d | 11186 | Lisp_Object obj; |
5f5c8ee5 GM |
11187 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11188 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 11189 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 11190 | |
0b67772d | 11191 | obj = Qnil; |
a2889657 JB |
11192 | |
11193 | switch (c) | |
11194 | { | |
1af9f229 RS |
11195 | case '*': |
11196 | if (!NILP (b->read_only)) | |
11197 | return "%"; | |
11198 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11199 | return "*"; | |
11200 | return "-"; | |
11201 | ||
11202 | case '+': | |
11203 | /* This differs from %* only for a modified read-only buffer. */ | |
11204 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11205 | return "*"; | |
11206 | if (!NILP (b->read_only)) | |
11207 | return "%"; | |
11208 | return "-"; | |
11209 | ||
11210 | case '&': | |
11211 | /* This differs from %* in ignoring read-only-ness. */ | |
11212 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11213 | return "*"; | |
11214 | return "-"; | |
11215 | ||
11216 | case '%': | |
11217 | return "%"; | |
11218 | ||
11219 | case '[': | |
11220 | { | |
11221 | int i; | |
11222 | char *p; | |
11223 | ||
11224 | if (command_loop_level > 5) | |
11225 | return "[[[... "; | |
11226 | p = decode_mode_spec_buf; | |
11227 | for (i = 0; i < command_loop_level; i++) | |
11228 | *p++ = '['; | |
11229 | *p = 0; | |
11230 | return decode_mode_spec_buf; | |
11231 | } | |
11232 | ||
11233 | case ']': | |
11234 | { | |
11235 | int i; | |
11236 | char *p; | |
11237 | ||
11238 | if (command_loop_level > 5) | |
11239 | return " ...]]]"; | |
11240 | p = decode_mode_spec_buf; | |
11241 | for (i = 0; i < command_loop_level; i++) | |
11242 | *p++ = ']'; | |
11243 | *p = 0; | |
11244 | return decode_mode_spec_buf; | |
11245 | } | |
11246 | ||
11247 | case '-': | |
11248 | { | |
1af9f229 | 11249 | register int i; |
5f5c8ee5 GM |
11250 | |
11251 | /* Let lots_of_dashes be a string of infinite length. */ | |
11252 | if (field_width <= 0 | |
11253 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 11254 | { |
5f5c8ee5 GM |
11255 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
11256 | decode_mode_spec_buf[i] = '-'; | |
11257 | decode_mode_spec_buf[i] = '\0'; | |
11258 | return decode_mode_spec_buf; | |
1af9f229 | 11259 | } |
5f5c8ee5 GM |
11260 | else |
11261 | return lots_of_dashes; | |
1af9f229 RS |
11262 | } |
11263 | ||
a2889657 | 11264 | case 'b': |
d39b6696 | 11265 | obj = b->name; |
a2889657 JB |
11266 | break; |
11267 | ||
1af9f229 RS |
11268 | case 'c': |
11269 | { | |
11270 | int col = current_column (); | |
11271 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 11272 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
11273 | return decode_mode_spec_buf; |
11274 | } | |
11275 | ||
11276 | case 'F': | |
11277 | /* %F displays the frame name. */ | |
5f5c8ee5 | 11278 | if (!NILP (f->title)) |
95184b48 | 11279 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 11280 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 11281 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 11282 | return "Emacs"; |
1af9f229 | 11283 | |
a2889657 | 11284 | case 'f': |
d39b6696 | 11285 | obj = b->filename; |
a2889657 JB |
11286 | break; |
11287 | ||
aa6d10fa RS |
11288 | case 'l': |
11289 | { | |
12adba34 RS |
11290 | int startpos = XMARKER (w->start)->charpos; |
11291 | int startpos_byte = marker_byte_position (w->start); | |
11292 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 11293 | int nlines, junk; |
aa6d10fa RS |
11294 | int height = XFASTINT (w->height); |
11295 | ||
11296 | /* If we decided that this buffer isn't suitable for line numbers, | |
11297 | don't forget that too fast. */ | |
11298 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 11299 | goto no_value; |
5300fd39 RS |
11300 | /* But do forget it, if the window shows a different buffer now. */ |
11301 | else if (BUFFERP (w->base_line_pos)) | |
11302 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
11303 | |
11304 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 11305 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
11306 | { |
11307 | w->base_line_pos = Qnil; | |
11308 | w->base_line_number = Qnil; | |
766525bc | 11309 | goto no_value; |
aa6d10fa RS |
11310 | } |
11311 | ||
11312 | if (!NILP (w->base_line_number) | |
11313 | && !NILP (w->base_line_pos) | |
12adba34 | 11314 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
11315 | { |
11316 | line = XFASTINT (w->base_line_number); | |
11317 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 11318 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
11319 | } |
11320 | else | |
11321 | { | |
11322 | line = 1; | |
d39b6696 | 11323 | linepos = BUF_BEGV (b); |
12adba34 | 11324 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
11325 | } |
11326 | ||
11327 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
11328 | nlines = display_count_lines (linepos, linepos_byte, |
11329 | startpos_byte, | |
11330 | startpos, &junk); | |
aa6d10fa RS |
11331 | |
11332 | topline = nlines + line; | |
11333 | ||
11334 | /* Determine a new base line, if the old one is too close | |
11335 | or too far away, or if we did not have one. | |
11336 | "Too close" means it's plausible a scroll-down would | |
11337 | go back past it. */ | |
d39b6696 | 11338 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 11339 | { |
c2213350 KH |
11340 | XSETFASTINT (w->base_line_number, topline); |
11341 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
11342 | } |
11343 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 11344 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 11345 | { |
d39b6696 | 11346 | int limit = BUF_BEGV (b); |
12adba34 | 11347 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
11348 | int position; |
11349 | int distance = (height * 2 + 30) * 200; | |
11350 | ||
11351 | if (startpos - distance > limit) | |
12adba34 RS |
11352 | { |
11353 | limit = startpos - distance; | |
11354 | limit_byte = CHAR_TO_BYTE (limit); | |
11355 | } | |
aa6d10fa | 11356 | |
12adba34 RS |
11357 | nlines = display_count_lines (startpos, startpos_byte, |
11358 | limit_byte, | |
11359 | - (height * 2 + 30), | |
aa6d10fa RS |
11360 | &position); |
11361 | /* If we couldn't find the lines we wanted within | |
11362 | 200 chars per line, | |
11363 | give up on line numbers for this window. */ | |
12adba34 | 11364 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
11365 | { |
11366 | w->base_line_pos = w->buffer; | |
11367 | w->base_line_number = Qnil; | |
766525bc | 11368 | goto no_value; |
aa6d10fa RS |
11369 | } |
11370 | ||
c2213350 | 11371 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 11372 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
11373 | } |
11374 | ||
11375 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
11376 | nlines = display_count_lines (startpos, startpos_byte, |
11377 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
11378 | |
11379 | /* Record that we did display the line number. */ | |
11380 | line_number_displayed = 1; | |
11381 | ||
11382 | /* Make the string to show. */ | |
5f5c8ee5 | 11383 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 11384 | return decode_mode_spec_buf; |
766525bc RS |
11385 | no_value: |
11386 | { | |
11387 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
11388 | int pad = field_width - 2; |
11389 | while (pad-- > 0) | |
11390 | *p++ = ' '; | |
11391 | *p++ = '?'; | |
11392 | *p = '?'; | |
766525bc RS |
11393 | return decode_mode_spec_buf; |
11394 | } | |
aa6d10fa RS |
11395 | } |
11396 | break; | |
11397 | ||
a2889657 | 11398 | case 'm': |
d39b6696 | 11399 | obj = b->mode_name; |
a2889657 JB |
11400 | break; |
11401 | ||
11402 | case 'n': | |
d39b6696 | 11403 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
11404 | return " Narrow"; |
11405 | break; | |
11406 | ||
a2889657 JB |
11407 | case 'p': |
11408 | { | |
11409 | int pos = marker_position (w->start); | |
d39b6696 | 11410 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 11411 | |
d39b6696 | 11412 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 11413 | { |
d39b6696 | 11414 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
11415 | return "All"; |
11416 | else | |
11417 | return "Bottom"; | |
11418 | } | |
d39b6696 | 11419 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
11420 | return "Top"; |
11421 | else | |
11422 | { | |
3c7d31b9 RS |
11423 | if (total > 1000000) |
11424 | /* Do it differently for a large value, to avoid overflow. */ | |
11425 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
11426 | else | |
11427 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
11428 | /* We can't normally display a 3-digit number, |
11429 | so get us a 2-digit number that is close. */ | |
11430 | if (total == 100) | |
11431 | total = 99; | |
11432 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
11433 | return decode_mode_spec_buf; | |
11434 | } | |
11435 | } | |
11436 | ||
8ffcb79f RS |
11437 | /* Display percentage of size above the bottom of the screen. */ |
11438 | case 'P': | |
11439 | { | |
11440 | int toppos = marker_position (w->start); | |
d39b6696 KH |
11441 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
11442 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 11443 | |
d39b6696 | 11444 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 11445 | { |
d39b6696 | 11446 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
11447 | return "All"; |
11448 | else | |
11449 | return "Bottom"; | |
11450 | } | |
11451 | else | |
11452 | { | |
3c7d31b9 RS |
11453 | if (total > 1000000) |
11454 | /* Do it differently for a large value, to avoid overflow. */ | |
11455 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
11456 | else | |
11457 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
11458 | /* We can't normally display a 3-digit number, |
11459 | so get us a 2-digit number that is close. */ | |
11460 | if (total == 100) | |
11461 | total = 99; | |
d39b6696 | 11462 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
11463 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
11464 | else | |
11465 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
11466 | return decode_mode_spec_buf; | |
11467 | } | |
11468 | } | |
11469 | ||
1af9f229 RS |
11470 | case 's': |
11471 | /* status of process */ | |
11472 | obj = Fget_buffer_process (w->buffer); | |
11473 | if (NILP (obj)) | |
11474 | return "no process"; | |
11475 | #ifdef subprocesses | |
11476 | obj = Fsymbol_name (Fprocess_status (obj)); | |
11477 | #endif | |
11478 | break; | |
d39b6696 | 11479 | |
1af9f229 RS |
11480 | case 't': /* indicate TEXT or BINARY */ |
11481 | #ifdef MODE_LINE_BINARY_TEXT | |
11482 | return MODE_LINE_BINARY_TEXT (b); | |
11483 | #else | |
11484 | return "T"; | |
11485 | #endif | |
1c9241f5 KH |
11486 | |
11487 | case 'z': | |
11488 | /* coding-system (not including end-of-line format) */ | |
11489 | case 'Z': | |
11490 | /* coding-system (including end-of-line type) */ | |
11491 | { | |
11492 | int eol_flag = (c == 'Z'); | |
539b4d41 | 11493 | char *p = decode_mode_spec_buf; |
1c9241f5 | 11494 | |
d30e754b | 11495 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 11496 | { |
11c52c4f RS |
11497 | /* No need to mention EOL here--the terminal never needs |
11498 | to do EOL conversion. */ | |
11499 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
11500 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 11501 | } |
f13c925f | 11502 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 11503 | p, eol_flag); |
f13c925f | 11504 | |
11c52c4f | 11505 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
11506 | #ifdef subprocesses |
11507 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
11508 | if (PROCESSP (obj)) | |
11509 | { | |
11510 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
11511 | p, eol_flag); | |
11512 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
11513 | p, eol_flag); | |
11514 | } | |
11515 | #endif /* subprocesses */ | |
11c52c4f | 11516 | #endif /* 0 */ |
1c9241f5 KH |
11517 | *p = 0; |
11518 | return decode_mode_spec_buf; | |
11519 | } | |
a2889657 | 11520 | } |
d39b6696 | 11521 | |
e24c997d | 11522 | if (STRINGP (obj)) |
a2889657 JB |
11523 | return (char *) XSTRING (obj)->data; |
11524 | else | |
11525 | return ""; | |
11526 | } | |
5f5c8ee5 GM |
11527 | |
11528 | ||
12adba34 RS |
11529 | /* Count up to COUNT lines starting from START / START_BYTE. |
11530 | But don't go beyond LIMIT_BYTE. | |
11531 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 11532 | |
12adba34 | 11533 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
11534 | |
11535 | static int | |
12adba34 RS |
11536 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
11537 | int start, start_byte, limit_byte, count; | |
11538 | int *byte_pos_ptr; | |
59b49f63 | 11539 | { |
59b49f63 RS |
11540 | register unsigned char *cursor; |
11541 | unsigned char *base; | |
11542 | ||
11543 | register int ceiling; | |
11544 | register unsigned char *ceiling_addr; | |
12adba34 | 11545 | int orig_count = count; |
59b49f63 RS |
11546 | |
11547 | /* If we are not in selective display mode, | |
11548 | check only for newlines. */ | |
12adba34 RS |
11549 | int selective_display = (!NILP (current_buffer->selective_display) |
11550 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
11551 | |
11552 | if (count > 0) | |
12adba34 RS |
11553 | { |
11554 | while (start_byte < limit_byte) | |
11555 | { | |
11556 | ceiling = BUFFER_CEILING_OF (start_byte); | |
11557 | ceiling = min (limit_byte - 1, ceiling); | |
11558 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
11559 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
11560 | while (1) | |
11561 | { | |
11562 | if (selective_display) | |
11563 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
11564 | ; | |
11565 | else | |
11566 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
11567 | ; | |
11568 | ||
11569 | if (cursor != ceiling_addr) | |
11570 | { | |
11571 | if (--count == 0) | |
11572 | { | |
11573 | start_byte += cursor - base + 1; | |
11574 | *byte_pos_ptr = start_byte; | |
11575 | return orig_count; | |
11576 | } | |
11577 | else | |
11578 | if (++cursor == ceiling_addr) | |
11579 | break; | |
11580 | } | |
11581 | else | |
11582 | break; | |
11583 | } | |
11584 | start_byte += cursor - base; | |
11585 | } | |
11586 | } | |
59b49f63 RS |
11587 | else |
11588 | { | |
12adba34 RS |
11589 | while (start_byte > limit_byte) |
11590 | { | |
11591 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
11592 | ceiling = max (limit_byte, ceiling); | |
11593 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
11594 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
11595 | while (1) |
11596 | { | |
12adba34 RS |
11597 | if (selective_display) |
11598 | while (--cursor != ceiling_addr | |
11599 | && *cursor != '\n' && *cursor != 015) | |
11600 | ; | |
11601 | else | |
11602 | while (--cursor != ceiling_addr && *cursor != '\n') | |
11603 | ; | |
11604 | ||
59b49f63 RS |
11605 | if (cursor != ceiling_addr) |
11606 | { | |
11607 | if (++count == 0) | |
11608 | { | |
12adba34 RS |
11609 | start_byte += cursor - base + 1; |
11610 | *byte_pos_ptr = start_byte; | |
11611 | /* When scanning backwards, we should | |
11612 | not count the newline posterior to which we stop. */ | |
11613 | return - orig_count - 1; | |
59b49f63 RS |
11614 | } |
11615 | } | |
11616 | else | |
11617 | break; | |
11618 | } | |
12adba34 RS |
11619 | /* Here we add 1 to compensate for the last decrement |
11620 | of CURSOR, which took it past the valid range. */ | |
11621 | start_byte += cursor - base + 1; | |
59b49f63 RS |
11622 | } |
11623 | } | |
11624 | ||
12adba34 | 11625 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 11626 | |
12adba34 RS |
11627 | if (count < 0) |
11628 | return - orig_count + count; | |
11629 | return orig_count - count; | |
aa6d10fa | 11630 | |
12adba34 | 11631 | } |
a2889657 | 11632 | |
a2889657 | 11633 | |
5f5c8ee5 GM |
11634 | \f |
11635 | /*********************************************************************** | |
11636 | Displaying strings | |
11637 | ***********************************************************************/ | |
278feba9 | 11638 | |
5f5c8ee5 | 11639 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 11640 | |
5f5c8ee5 GM |
11641 | If STRING is non-null, display that C string. Otherwise, the Lisp |
11642 | string LISP_STRING is displayed. | |
a2889657 | 11643 | |
5f5c8ee5 GM |
11644 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
11645 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
11646 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 11647 | |
5f5c8ee5 GM |
11648 | Display the string in the environment given by IT, but use the |
11649 | standard display table, temporarily. | |
a3788d53 | 11650 | |
5f5c8ee5 GM |
11651 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
11652 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
11653 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
11654 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
11655 | ||
11656 | PRECISION is the maximum number of characters to output from | |
11657 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 11658 | |
5f5c8ee5 | 11659 | This is roughly equivalent to printf format specifiers: |
a2889657 | 11660 | |
5f5c8ee5 GM |
11661 | FIELD_WIDTH PRECISION PRINTF |
11662 | ---------------------------------------- | |
11663 | -1 -1 %s | |
11664 | -1 10 %.10s | |
11665 | 10 -1 %10s | |
11666 | 20 10 %20.10s | |
a2889657 | 11667 | |
5f5c8ee5 GM |
11668 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
11669 | display them, and < 0 means obey the current buffer's value of | |
11670 | enable_multibyte_characters. | |
278feba9 | 11671 | |
5f5c8ee5 | 11672 | Value is the number of glyphs produced. */ |
b1d1124b | 11673 | |
5f5c8ee5 GM |
11674 | static int |
11675 | display_string (string, lisp_string, face_string, face_string_pos, | |
11676 | start, it, field_width, precision, max_x, multibyte) | |
11677 | unsigned char *string; | |
11678 | Lisp_Object lisp_string; | |
11679 | int start; | |
11680 | struct it *it; | |
11681 | int field_width, precision, max_x; | |
11682 | int multibyte; | |
11683 | { | |
11684 | int hpos_at_start = it->hpos; | |
11685 | int saved_face_id = it->face_id; | |
11686 | struct glyph_row *row = it->glyph_row; | |
11687 | ||
11688 | /* Initialize the iterator IT for iteration over STRING beginning | |
11689 | with index START. We assume that IT may be modified here (which | |
11690 | means that display_line has to do something when displaying a | |
11691 | mini-buffer prompt, which it does). */ | |
11692 | reseat_to_string (it, string, lisp_string, start, | |
11693 | precision, field_width, multibyte); | |
11694 | ||
11695 | /* If displaying STRING, set up the face of the iterator | |
11696 | from LISP_STRING, if that's given. */ | |
11697 | if (STRINGP (face_string)) | |
11698 | { | |
11699 | int endptr; | |
11700 | struct face *face; | |
11701 | ||
11702 | it->face_id | |
11703 | = face_at_string_position (it->w, face_string, face_string_pos, | |
11704 | 0, it->region_beg_charpos, | |
11705 | it->region_end_charpos, | |
11706 | &endptr, it->base_face_id); | |
11707 | face = FACE_FROM_ID (it->f, it->face_id); | |
11708 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 11709 | } |
a2889657 | 11710 | |
5f5c8ee5 GM |
11711 | /* Set max_x to the maximum allowed X position. Don't let it go |
11712 | beyond the right edge of the window. */ | |
11713 | if (max_x <= 0) | |
11714 | max_x = it->last_visible_x; | |
11715 | else | |
11716 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 11717 | |
5f5c8ee5 GM |
11718 | /* Skip over display elements that are not visible. because IT->w is |
11719 | hscrolled. */ | |
11720 | if (it->current_x < it->first_visible_x) | |
11721 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
11722 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 11723 | |
5f5c8ee5 GM |
11724 | row->ascent = it->max_ascent; |
11725 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
11726 | row->phys_ascent = it->max_phys_ascent; |
11727 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 11728 | |
5f5c8ee5 GM |
11729 | /* This condition is for the case that we are called with current_x |
11730 | past last_visible_x. */ | |
11731 | while (it->current_x < max_x) | |
a2889657 | 11732 | { |
5f5c8ee5 | 11733 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 11734 | |
5f5c8ee5 GM |
11735 | /* Get the next display element. */ |
11736 | if (!get_next_display_element (it)) | |
90adcf20 | 11737 | break; |
1c9241f5 | 11738 | |
5f5c8ee5 GM |
11739 | /* Produce glyphs. */ |
11740 | x_before = it->current_x; | |
11741 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
11742 | PRODUCE_GLYPHS (it); | |
90adcf20 | 11743 | |
5f5c8ee5 GM |
11744 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
11745 | i = 0; | |
11746 | x = x_before; | |
11747 | while (i < nglyphs) | |
a2889657 | 11748 | { |
5f5c8ee5 GM |
11749 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
11750 | ||
11751 | if (!it->truncate_lines_p | |
11752 | && x + glyph->pixel_width > max_x) | |
11753 | { | |
11754 | /* End of continued line or max_x reached. */ | |
11755 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
11756 | it->current_x = x; | |
11757 | break; | |
11758 | } | |
11759 | else if (x + glyph->pixel_width > it->first_visible_x) | |
11760 | { | |
11761 | /* Glyph is at least partially visible. */ | |
11762 | ++it->hpos; | |
11763 | if (x < it->first_visible_x) | |
11764 | it->glyph_row->x = x - it->first_visible_x; | |
11765 | } | |
11766 | else | |
a2889657 | 11767 | { |
5f5c8ee5 GM |
11768 | /* Glyph is off the left margin of the display area. |
11769 | Should not happen. */ | |
11770 | abort (); | |
a2889657 | 11771 | } |
5f5c8ee5 GM |
11772 | |
11773 | row->ascent = max (row->ascent, it->max_ascent); | |
11774 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11775 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11776 | row->phys_height = max (row->phys_height, | |
11777 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11778 | x += glyph->pixel_width; |
11779 | ++i; | |
a2889657 | 11780 | } |
5f5c8ee5 GM |
11781 | |
11782 | /* Stop if max_x reached. */ | |
11783 | if (i < nglyphs) | |
11784 | break; | |
11785 | ||
11786 | /* Stop at line ends. */ | |
11787 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 11788 | { |
5f5c8ee5 GM |
11789 | it->continuation_lines_width = 0; |
11790 | break; | |
a2889657 | 11791 | } |
1c9241f5 | 11792 | |
5f5c8ee5 | 11793 | set_iterator_to_next (it); |
a688bb24 | 11794 | |
5f5c8ee5 GM |
11795 | /* Stop if truncating at the right edge. */ |
11796 | if (it->truncate_lines_p | |
11797 | && it->current_x >= it->last_visible_x) | |
11798 | { | |
11799 | /* Add truncation mark, but don't do it if the line is | |
11800 | truncated at a padding space. */ | |
11801 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 11802 | { |
5f5c8ee5 GM |
11803 | if (!FRAME_WINDOW_P (it->f)) |
11804 | produce_special_glyphs (it, IT_TRUNCATION); | |
11805 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 11806 | } |
5f5c8ee5 | 11807 | break; |
1c9241f5 | 11808 | } |
a2889657 JB |
11809 | } |
11810 | ||
5f5c8ee5 GM |
11811 | /* Maybe insert a truncation at the left. */ |
11812 | if (it->first_visible_x | |
11813 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 11814 | { |
5f5c8ee5 GM |
11815 | if (!FRAME_WINDOW_P (it->f)) |
11816 | insert_left_trunc_glyphs (it); | |
11817 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
11818 | } |
11819 | ||
5f5c8ee5 GM |
11820 | it->face_id = saved_face_id; |
11821 | ||
11822 | /* Value is number of columns displayed. */ | |
11823 | return it->hpos - hpos_at_start; | |
11824 | } | |
a2889657 | 11825 | |
a2889657 | 11826 | |
a2889657 | 11827 | \f |
5f5c8ee5 GM |
11828 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
11829 | appears as an element of LIST or as the car of an element of LIST. | |
11830 | If PROPVAL is a list, compare each element against LIST in that | |
11831 | way, and return 1 if any element of PROPVAL is found in LIST. | |
11832 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
11833 | |
11834 | int | |
11835 | invisible_p (propval, list) | |
11836 | register Lisp_Object propval; | |
11837 | Lisp_Object list; | |
11838 | { | |
af460d46 RS |
11839 | register Lisp_Object tail, proptail; |
11840 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
11841 | { |
11842 | register Lisp_Object tem; | |
af460d46 | 11843 | tem = XCONS (tail)->car; |
642eefc6 RS |
11844 | if (EQ (propval, tem)) |
11845 | return 1; | |
11846 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) | |
11847 | return 1; | |
11848 | } | |
af460d46 RS |
11849 | if (CONSP (propval)) |
11850 | for (proptail = propval; CONSP (proptail); | |
11851 | proptail = XCONS (proptail)->cdr) | |
11852 | { | |
11853 | Lisp_Object propelt; | |
11854 | propelt = XCONS (proptail)->car; | |
11855 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
11856 | { | |
11857 | register Lisp_Object tem; | |
11858 | tem = XCONS (tail)->car; | |
11859 | if (EQ (propelt, tem)) | |
11860 | return 1; | |
11861 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
11862 | return 1; | |
11863 | } | |
11864 | } | |
642eefc6 RS |
11865 | return 0; |
11866 | } | |
11867 | ||
5f5c8ee5 GM |
11868 | |
11869 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
11870 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
11871 | each element of PROPVAL in that way, and the first time some | |
11872 | element is found, return 1 if the cdr of that element is non-nil. | |
11873 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
11874 | |
11875 | int | |
11876 | invisible_ellipsis_p (propval, list) | |
11877 | register Lisp_Object propval; | |
11878 | Lisp_Object list; | |
11879 | { | |
af460d46 RS |
11880 | register Lisp_Object tail, proptail; |
11881 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
11882 | { |
11883 | register Lisp_Object tem; | |
af460d46 | 11884 | tem = XCONS (tail)->car; |
642eefc6 RS |
11885 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) |
11886 | return ! NILP (XCONS (tem)->cdr); | |
11887 | } | |
af460d46 RS |
11888 | if (CONSP (propval)) |
11889 | for (proptail = propval; CONSP (proptail); | |
11890 | proptail = XCONS (proptail)->cdr) | |
11891 | { | |
11892 | Lisp_Object propelt; | |
11893 | propelt = XCONS (proptail)->car; | |
11894 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
11895 | { | |
11896 | register Lisp_Object tem; | |
11897 | tem = XCONS (tail)->car; | |
11898 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
11899 | return ! NILP (XCONS (tem)->cdr); | |
11900 | } | |
11901 | } | |
642eefc6 RS |
11902 | return 0; |
11903 | } | |
5f5c8ee5 GM |
11904 | |
11905 | ||
642eefc6 | 11906 | \f |
5f5c8ee5 GM |
11907 | /*********************************************************************** |
11908 | Initialization | |
11909 | ***********************************************************************/ | |
11910 | ||
a2889657 JB |
11911 | void |
11912 | syms_of_xdisp () | |
11913 | { | |
5f5c8ee5 GM |
11914 | echo_area_message = previous_echo_area_message = Qnil; |
11915 | staticpro (&echo_area_message); | |
11916 | staticpro (&previous_echo_area_message); | |
11917 | ||
735c094c KH |
11918 | staticpro (&Qinhibit_redisplay); |
11919 | Qinhibit_redisplay = intern ("inhibit-redisplay"); | |
11920 | ||
5f5c8ee5 GM |
11921 | #if GLYPH_DEBUG |
11922 | defsubr (&Sdump_glyph_matrix); | |
11923 | defsubr (&Sdump_glyph_row); | |
11924 | defsubr (&Sdump_toolbar_row); | |
11925 | defsubr (&Strace_redisplay_toggle); | |
11926 | #endif | |
11927 | ||
cf074754 RS |
11928 | staticpro (&Qmenu_bar_update_hook); |
11929 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
11930 | ||
d46fb96a | 11931 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 11932 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 11933 | |
399164b4 KH |
11934 | staticpro (&Qoverriding_local_map); |
11935 | Qoverriding_local_map = intern ("overriding-local-map"); | |
11936 | ||
75c43375 RS |
11937 | staticpro (&Qwindow_scroll_functions); |
11938 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
11939 | ||
e0bfbde6 RS |
11940 | staticpro (&Qredisplay_end_trigger_functions); |
11941 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 11942 | |
2e54982e RS |
11943 | staticpro (&Qinhibit_point_motion_hooks); |
11944 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
11945 | ||
5f5c8ee5 GM |
11946 | staticpro (&Qdisplay); |
11947 | Qdisplay = intern ("display"); | |
11948 | staticpro (&Qleft_margin); | |
11949 | Qspace_width = intern ("space-width"); | |
11950 | staticpro (&Qspace_width); | |
11951 | Qheight = intern ("height"); | |
11952 | staticpro (&Qheight); | |
11953 | Qraise = intern ("raise"); | |
11954 | staticpro (&Qraise); | |
11955 | Qspace = intern ("space"); | |
11956 | staticpro (&Qspace); | |
11957 | Qleft_margin = intern ("left-margin"); | |
11958 | staticpro (&Qright_margin); | |
11959 | Qright_margin = intern ("right-margin"); | |
11960 | Qalign_to = intern ("align-to"); | |
11961 | staticpro (&Qalign_to); | |
11962 | QCalign_to = intern (":align-to"); | |
11963 | staticpro (&QCalign_to); | |
11964 | Qwidth = intern ("width"); | |
11965 | staticpro (&Qwidth); | |
11966 | Qrelative_width = intern ("relative-width"); | |
11967 | staticpro (&Qrelative_width); | |
11968 | QCrelative_width = intern (":relative-width"); | |
11969 | staticpro (&QCrelative_width); | |
11970 | QCrelative_height = intern (":relative-height"); | |
11971 | staticpro (&QCrelative_height); | |
11972 | QCeval = intern (":eval"); | |
11973 | staticpro (&QCeval); | |
11974 | QCwhen = intern (":when"); | |
11975 | staticpro (&QCwhen); | |
11976 | Qfontified = intern ("fontified"); | |
11977 | staticpro (&Qfontified); | |
11978 | Qfontification_functions = intern ("fontification-functions"); | |
11979 | staticpro (&Qfontification_functions); | |
11980 | Qshow_trailing_whitespace = intern ("show-trailing-whitespace"); | |
11981 | staticpro (&Qshow_trailing_whitespace); | |
11982 | Qtrailing_whitespace = intern ("trailing-whitespace"); | |
11983 | staticpro (&Qtrailing_whitespace); | |
11984 | Qimage = intern ("image"); | |
11985 | staticpro (&Qimage); | |
11986 | ||
a2889657 JB |
11987 | staticpro (&last_arrow_position); |
11988 | staticpro (&last_arrow_string); | |
11989 | last_arrow_position = Qnil; | |
11990 | last_arrow_string = Qnil; | |
11991 | ||
735c094c KH |
11992 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
11993 | "Non-nil means don't actually do any redisplay.\n\ | |
11994 | This is used for internal purposes."); | |
11995 | Vinhibit_redisplay = Qnil; | |
11996 | ||
a2889657 | 11997 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 11998 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
11999 | Vglobal_mode_string = Qnil; |
12000 | ||
12001 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
12002 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
12003 | This must be the beginning of a line in order to work.\n\ | |
12004 | See also `overlay-arrow-string'."); | |
12005 | Voverlay_arrow_position = Qnil; | |
12006 | ||
12007 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
12008 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
12009 | Voverlay_arrow_string = Qnil; | |
12010 | ||
12011 | DEFVAR_INT ("scroll-step", &scroll_step, | |
12012 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
12013 | If that fails to bring point back on frame, point is centered instead.\n\ |
12014 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 12015 | |
0789adb2 RS |
12016 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
12017 | "*Scroll up to this many lines, to bring point back on screen."); | |
12018 | scroll_conservatively = 0; | |
12019 | ||
9afd2168 RS |
12020 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
12021 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
12022 | Recenter the window whenever point gets within this many lines\n\ | |
12023 | of the top or bottom of the window."); | |
12024 | scroll_margin = 0; | |
12025 | ||
5f5c8ee5 | 12026 | #if GLYPH_DEBUG |
a2889657 | 12027 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 12028 | #endif |
a2889657 JB |
12029 | |
12030 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
12031 | &truncate_partial_width_windows, | |
44fa5b1e | 12032 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
12033 | truncate_partial_width_windows = 1; |
12034 | ||
12035 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
12036 | "*Non-nil means use inverse video for the mode line."); | |
12037 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
12038 | |
12039 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5f5c8ee5 | 12040 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 12041 | If the buffer is bigger than this, the line number does not appear\n\ |
9f027393 | 12042 | in the mode line."); |
aa6d10fa | 12043 | line_number_display_limit = 1000000; |
fba9ce76 RS |
12044 | |
12045 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, | |
12046 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 12047 | highlight_nonselected_windows = 0; |
d39b6696 KH |
12048 | |
12049 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
12050 | "Non-nil if more than one frame is visible on this display.\n\ |
12051 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
12052 | This variable is not guaranteed to be accurate except while processing\n\ |
12053 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
12054 | |
12055 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 12056 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
12057 | \(Assuming the window manager supports this feature.)\n\ |
12058 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12059 | and is used only on frames for which no explicit name has been set\n\ | |
12060 | \(see `modify-frame-parameters')."); | |
12061 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 12062 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
12063 | \(Assuming the window manager supports this feature.)\n\ |
12064 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12065 | and is used only on frames for which no explicit name has been set\n\ | |
12066 | \(see `modify-frame-parameters')."); | |
12067 | Vicon_title_format | |
12068 | = Vframe_title_format | |
12069 | = Fcons (intern ("multiple-frames"), | |
12070 | Fcons (build_string ("%b"), | |
12071 | Fcons (Fcons (build_string (""), | |
12072 | Fcons (intern ("invocation-name"), | |
12073 | Fcons (build_string ("@"), | |
12074 | Fcons (intern ("system-name"), | |
12075 | Qnil)))), | |
12076 | Qnil))); | |
5992c4f7 KH |
12077 | |
12078 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
12079 | "Maximum number of lines to keep in the message log buffer.\n\ | |
12080 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
12081 | the buffer when it becomes large."); | |
12082 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
12083 | |
12084 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
12085 | "Functions called before redisplay, if window sizes have changed.\n\ | |
12086 | The value should be a list of functions that take one argument.\n\ | |
12087 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
12088 | size since the last redisplay, or have been split or deleted,\n\ | |
12089 | all the functions in the list are called, with the frame as argument."); | |
12090 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
12091 | |
12092 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 12093 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 12094 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
12095 | and its new display-start position. Note that the value of `window-end'\n\ |
12096 | is not valid when these functions are called."); | |
75c43375 | 12097 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 GM |
12098 | |
12099 | DEFVAR_BOOL ("auto-resize-toolbars", &auto_resize_toolbars_p, | |
12100 | "*Non-nil means automatically resize toolbars.\n\ | |
12101 | This increases a toolbar's height if not all toolbar items are visible.\n\ | |
12102 | It decreases a toolbar's height when it would display blank lines\n\ | |
12103 | otherwise."); | |
12104 | auto_resize_toolbars_p = 1; | |
12105 | ||
12106 | DEFVAR_BOOL ("auto-raise-toolbar-buttons", &auto_raise_toolbar_buttons_p, | |
12107 | "*Non-nil means raise toolbar buttons when the mouse moves over them."); | |
12108 | auto_raise_toolbar_buttons_p = 1; | |
12109 | ||
12110 | DEFVAR_INT ("toolbar-button-margin", &toolbar_button_margin, | |
12111 | "*Margin around toolbar buttons in pixels."); | |
12112 | toolbar_button_margin = 1; | |
12113 | ||
12114 | DEFVAR_INT ("toolbar-button-relief", &toolbar_button_relief, | |
12115 | "Relief thickness of toolbar buttons."); | |
12116 | toolbar_button_relief = 3; | |
12117 | ||
12118 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
12119 | "List of functions to call to fontify regions of text.\n\ | |
12120 | Each function is called with one argument POS. Functions must\n\ | |
12121 | fontify a region starting at POS in the current buffer, and give\n\ | |
12122 | fontified regions the property `fontified'.\n\ | |
12123 | This variable automatically becomes buffer-local when set."); | |
12124 | Vfontification_functions = Qnil; | |
12125 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
12126 | |
12127 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
12128 | &unibyte_display_via_language_environment, |
12129 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
12130 | Specifically this means that unibyte non-ASCII characters\n\ |
12131 | are displayed by converting them to the equivalent multibyte characters\n\ | |
12132 | according to the current language environment. As a result, they are\n\ | |
12133 | displayed according to the current fontset."); | |
12134 | unibyte_display_via_language_environment = 0; | |
a2889657 JB |
12135 | } |
12136 | ||
5f5c8ee5 GM |
12137 | |
12138 | /* Initialize this module when Emacs starts. */ | |
12139 | ||
dfcf069d | 12140 | void |
a2889657 JB |
12141 | init_xdisp () |
12142 | { | |
12143 | Lisp_Object root_window; | |
5f5c8ee5 | 12144 | struct window *mini_w; |
a2889657 | 12145 | |
5f5c8ee5 | 12146 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
12147 | |
12148 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 12149 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 JB |
12150 | |
12151 | echo_area_glyphs = 0; | |
12152 | previous_echo_glyphs = 0; | |
5f5c8ee5 | 12153 | echo_area_message = previous_echo_area_message = Qnil; |
a2889657 JB |
12154 | |
12155 | if (!noninteractive) | |
12156 | { | |
5f5c8ee5 GM |
12157 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12158 | int i; | |
12159 | ||
12160 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 12161 | set_window_height (root_window, |
5f5c8ee5 | 12162 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 12163 | 0); |
c2213350 | 12164 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
12165 | set_window_height (minibuf_window, 1, 0); |
12166 | ||
c2213350 KH |
12167 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
12168 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
12169 | |
12170 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
12171 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
12172 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
12173 | ||
12174 | /* The default ellipsis glyphs `...'. */ | |
12175 | for (i = 0; i < 3; ++i) | |
12176 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 12177 | } |
5f5c8ee5 GM |
12178 | |
12179 | #ifdef HAVE_WINDOW_SYSTEM | |
12180 | { | |
12181 | /* Allocate the buffer for frame titles. */ | |
12182 | int size = 100; | |
12183 | frame_title_buf = (char *) xmalloc (size); | |
12184 | frame_title_buf_end = frame_title_buf + size; | |
12185 | frame_title_ptr = NULL; | |
12186 | } | |
12187 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 12188 | } |
5f5c8ee5 GM |
12189 | |
12190 |