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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 | ||
8f897821 | 262 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 263 | |
8f897821 | 264 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
265 | |
266 | /* Name of the face used to highlight trailing whitespace. */ | |
267 | ||
268 | Lisp_Object Qtrailing_whitespace; | |
269 | ||
270 | /* The symbol `image' which is the car of the lists used to represent | |
271 | images in Lisp. */ | |
272 | ||
273 | Lisp_Object Qimage; | |
274 | ||
275 | /* Non-zero means print newline to stdout before next mini-buffer | |
276 | message. */ | |
a2889657 JB |
277 | |
278 | int noninteractive_need_newline; | |
279 | ||
5f5c8ee5 | 280 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 281 | |
3c6595e0 | 282 | static int message_log_need_newline; |
f88eb0b6 | 283 | |
5f5c8ee5 GM |
284 | \f |
285 | /* The buffer position of the first character appearing entirely or | |
286 | partially on the line of the selected window which contains the | |
287 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
288 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 289 | |
5f5c8ee5 | 290 | static struct text_pos this_line_start_pos; |
a2889657 | 291 | |
5f5c8ee5 GM |
292 | /* Number of characters past the end of the line above, including the |
293 | terminating newline. */ | |
294 | ||
295 | static struct text_pos this_line_end_pos; | |
296 | ||
297 | /* The vertical positions and the height of this line. */ | |
a2889657 | 298 | |
a2889657 | 299 | static int this_line_vpos; |
5f5c8ee5 GM |
300 | static int this_line_y; |
301 | static int this_line_pixel_height; | |
302 | ||
303 | /* X position at which this display line starts. Usually zero; | |
304 | negative if first character is partially visible. */ | |
305 | ||
306 | static int this_line_start_x; | |
a2889657 | 307 | |
5f5c8ee5 | 308 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 309 | |
a2889657 JB |
310 | static struct buffer *this_line_buffer; |
311 | ||
5f5c8ee5 GM |
312 | /* Nonzero means truncate lines in all windows less wide than the |
313 | frame. */ | |
a2889657 | 314 | |
a2889657 JB |
315 | int truncate_partial_width_windows; |
316 | ||
7bbe686f | 317 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 318 | |
7bbe686f | 319 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
320 | |
321 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
322 | Not guaranteed to be accurate except while parsing | |
323 | frame-title-format. */ | |
7bbe686f | 324 | |
d39b6696 KH |
325 | int multiple_frames; |
326 | ||
a2889657 JB |
327 | Lisp_Object Vglobal_mode_string; |
328 | ||
329 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 330 | |
a2889657 JB |
331 | Lisp_Object Voverlay_arrow_position; |
332 | ||
5f5c8ee5 GM |
333 | /* String to display for the arrow. Only used on terminal frames. */ |
334 | ||
a2889657 JB |
335 | Lisp_Object Voverlay_arrow_string; |
336 | ||
5f5c8ee5 GM |
337 | /* Values of those variables at last redisplay. However, if |
338 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
339 | numerical position. */ | |
340 | ||
d45de95b RS |
341 | static Lisp_Object last_arrow_position, last_arrow_string; |
342 | ||
5f5c8ee5 GM |
343 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
344 | ||
d39b6696 KH |
345 | Lisp_Object Vframe_title_format; |
346 | ||
5f5c8ee5 GM |
347 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
348 | ||
d39b6696 KH |
349 | Lisp_Object Vicon_title_format; |
350 | ||
08b610e4 RS |
351 | /* List of functions to call when a window's size changes. These |
352 | functions get one arg, a frame on which one or more windows' sizes | |
353 | have changed. */ | |
5f5c8ee5 | 354 | |
08b610e4 RS |
355 | static Lisp_Object Vwindow_size_change_functions; |
356 | ||
cf074754 RS |
357 | Lisp_Object Qmenu_bar_update_hook; |
358 | ||
a2889657 | 359 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 360 | |
5f5c8ee5 | 361 | static int overlay_arrow_seen; |
ca26e1c8 | 362 | |
fba9ce76 | 363 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 364 | |
5f5c8ee5 GM |
365 | int highlight_nonselected_windows; |
366 | ||
367 | /* If cursor motion alone moves point off frame, try scrolling this | |
368 | many lines up or down if that will bring it back. */ | |
369 | ||
14510fee | 370 | static int scroll_step; |
a2889657 | 371 | |
5f5c8ee5 GM |
372 | /* Non-0 means scroll just far enough to bring point back on the |
373 | screen, when appropriate. */ | |
374 | ||
0789adb2 RS |
375 | static int scroll_conservatively; |
376 | ||
5f5c8ee5 GM |
377 | /* Recenter the window whenever point gets within this many lines of |
378 | the top or bottom of the window. This value is translated into a | |
379 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
380 | there is really a fixed pixel height scroll margin. */ | |
381 | ||
9afd2168 RS |
382 | int scroll_margin; |
383 | ||
5f5c8ee5 GM |
384 | /* Number of windows showing the buffer of the selected window (or |
385 | another buffer with the same base buffer). keyboard.c refers to | |
386 | this. */ | |
a2889657 | 387 | |
a2889657 JB |
388 | int buffer_shared; |
389 | ||
5f5c8ee5 | 390 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 391 | |
5f5c8ee5 | 392 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 393 | |
5f5c8ee5 | 394 | /* Nonzero means display mode line highlighted. */ |
a2889657 | 395 | |
a2889657 JB |
396 | int mode_line_inverse_video; |
397 | ||
5f5c8ee5 GM |
398 | /* Prompt to display in front of the mini-buffer contents. */ |
399 | ||
8c5b6a0a | 400 | Lisp_Object minibuf_prompt; |
a2889657 | 401 | |
5f5c8ee5 GM |
402 | /* Width of current mini-buffer prompt. Only set after display_line |
403 | of the line that contains the prompt. */ | |
404 | ||
a2889657 | 405 | int minibuf_prompt_width; |
5f5c8ee5 GM |
406 | int minibuf_prompt_pixel_width; |
407 | ||
5f5c8ee5 GM |
408 | /* This is the window where the echo area message was displayed. It |
409 | is always a mini-buffer window, but it may not be the same window | |
410 | currently active as a mini-buffer. */ | |
411 | ||
73af359d RS |
412 | Lisp_Object echo_area_window; |
413 | ||
c6e89d6c GM |
414 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
415 | pushes the current message and the value of | |
416 | message_enable_multibyte on the stack, the function restore_message | |
417 | pops the stack and displays MESSAGE again. */ | |
418 | ||
419 | Lisp_Object Vmessage_stack; | |
420 | ||
a3788d53 RS |
421 | /* Nonzero means multibyte characters were enabled when the echo area |
422 | message was specified. */ | |
5f5c8ee5 | 423 | |
a3788d53 RS |
424 | int message_enable_multibyte; |
425 | ||
5f5c8ee5 GM |
426 | /* True if we should redraw the mode lines on the next redisplay. */ |
427 | ||
a2889657 JB |
428 | int update_mode_lines; |
429 | ||
5f5c8ee5 GM |
430 | /* Nonzero if window sizes or contents have changed since last |
431 | redisplay that finished */ | |
432 | ||
a2889657 JB |
433 | int windows_or_buffers_changed; |
434 | ||
5f5c8ee5 GM |
435 | /* Nonzero after display_mode_line if %l was used and it displayed a |
436 | line number. */ | |
437 | ||
aa6d10fa RS |
438 | int line_number_displayed; |
439 | ||
440 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 441 | |
14510fee | 442 | static int line_number_display_limit; |
5992c4f7 | 443 | |
5d121aec KH |
444 | /* line width to consider when repostioning for line number display */ |
445 | ||
446 | static int line_number_display_limit_width; | |
447 | ||
5f5c8ee5 GM |
448 | /* Number of lines to keep in the message log buffer. t means |
449 | infinite. nil means don't log at all. */ | |
450 | ||
5992c4f7 | 451 | Lisp_Object Vmessage_log_max; |
d45de95b | 452 | |
c6e89d6c GM |
453 | /* Current, index 0, and last displayed echo area message. Either |
454 | buffers from echo_buffers, or nil to indicate no message. */ | |
455 | ||
456 | Lisp_Object echo_area_buffer[2]; | |
457 | ||
458 | /* The buffers referenced from echo_area_buffer. */ | |
459 | ||
460 | static Lisp_Object echo_buffer[2]; | |
461 | ||
462 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
463 | ||
464 | static Lisp_Object Vwith_echo_area_save_vector; | |
465 | ||
466 | /* Non-zero means display_echo_area should display the last echo area | |
467 | message again. Set by redisplay_preserve_echo_area. */ | |
468 | ||
469 | static int display_last_displayed_message_p; | |
470 | ||
471 | /* Nonzero if echo area is being used by print; zero if being used by | |
472 | message. */ | |
473 | ||
474 | int message_buf_print; | |
475 | ||
9142dd5b GM |
476 | /* Maximum height for resizing mini-windows. Either a float |
477 | specifying a fraction of the available height, or an integer | |
478 | specifying a number of lines. */ | |
c6e89d6c GM |
479 | |
480 | static Lisp_Object Vmax_mini_window_height; | |
481 | ||
9142dd5b GM |
482 | /* Window configuration saved in resize_mini_window. */ |
483 | ||
c59c668a GM |
484 | Lisp_Object Vresize_mini_config; |
485 | ||
486 | /* Frmae of the mini-window being resized by resize_mini_window. */ | |
487 | ||
488 | struct frame *resize_mini_frame; | |
489 | ||
490 | /* Initial height of the mini-window having been resized | |
491 | by resize_mini_window. */ | |
492 | ||
493 | int resize_mini_initial_height; | |
9142dd5b | 494 | |
5f5c8ee5 GM |
495 | /* A scratch glyph row with contents used for generating truncation |
496 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 497 | |
5f5c8ee5 GM |
498 | #define MAX_SCRATCH_GLYPHS 100 |
499 | struct glyph_row scratch_glyph_row; | |
500 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 501 | |
5f5c8ee5 GM |
502 | /* Ascent and height of the last line processed by move_it_to. */ |
503 | ||
504 | static int last_max_ascent, last_height; | |
505 | ||
506 | /* The maximum distance to look ahead for text properties. Values | |
507 | that are too small let us call compute_char_face and similar | |
508 | functions too often which is expensive. Values that are too large | |
509 | let us call compute_char_face and alike too often because we | |
510 | might not be interested in text properties that far away. */ | |
511 | ||
512 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
513 | ||
514 | /* Non-zero means print traces of redisplay if compiled with | |
515 | GLYPH_DEBUG != 0. */ | |
516 | ||
517 | #if GLYPH_DEBUG | |
518 | int trace_redisplay_p; | |
519 | #endif | |
520 | ||
521 | /* Value returned from text property handlers (see below). */ | |
522 | ||
523 | enum prop_handled | |
3c6595e0 | 524 | { |
5f5c8ee5 GM |
525 | HANDLED_NORMALLY, |
526 | HANDLED_RECOMPUTE_PROPS, | |
527 | HANDLED_OVERLAY_STRING_CONSUMED, | |
528 | HANDLED_RETURN | |
529 | }; | |
3c6595e0 | 530 | |
5f5c8ee5 GM |
531 | /* A description of text properties that redisplay is interested |
532 | in. */ | |
3c6595e0 | 533 | |
5f5c8ee5 GM |
534 | struct props |
535 | { | |
536 | /* The name of the property. */ | |
537 | Lisp_Object *name; | |
90adcf20 | 538 | |
5f5c8ee5 GM |
539 | /* A unique index for the property. */ |
540 | enum prop_idx idx; | |
541 | ||
542 | /* A handler function called to set up iterator IT from the property | |
543 | at IT's current position. Value is used to steer handle_stop. */ | |
544 | enum prop_handled (*handler) P_ ((struct it *it)); | |
545 | }; | |
546 | ||
547 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
548 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
549 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
550 | static enum prop_handled handle_overlay_change P_ ((struct it *)); | |
551 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
552 | ||
553 | /* Properties handled by iterators. */ | |
554 | ||
555 | static struct props it_props[] = | |
5992c4f7 | 556 | { |
5f5c8ee5 GM |
557 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
558 | /* Handle `face' before `display' because some sub-properties of | |
559 | `display' need to know the face. */ | |
560 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
561 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
562 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
563 | {NULL, 0, NULL} | |
564 | }; | |
5992c4f7 | 565 | |
5f5c8ee5 GM |
566 | /* Value is the position described by X. If X is a marker, value is |
567 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 568 | |
5f5c8ee5 | 569 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 570 | |
5f5c8ee5 | 571 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 572 | |
5f5c8ee5 GM |
573 | enum move_it_result |
574 | { | |
575 | /* Not used. Undefined value. */ | |
576 | MOVE_UNDEFINED, | |
bab29e15 | 577 | |
5f5c8ee5 GM |
578 | /* Move ended at the requested buffer position or ZV. */ |
579 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 580 | |
5f5c8ee5 GM |
581 | /* Move ended at the requested X pixel position. */ |
582 | MOVE_X_REACHED, | |
12adba34 | 583 | |
5f5c8ee5 GM |
584 | /* Move within a line ended at the end of a line that must be |
585 | continued. */ | |
586 | MOVE_LINE_CONTINUED, | |
587 | ||
588 | /* Move within a line ended at the end of a line that would | |
589 | be displayed truncated. */ | |
590 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 591 | |
5f5c8ee5 GM |
592 | /* Move within a line ended at a line end. */ |
593 | MOVE_NEWLINE_OR_CR | |
594 | }; | |
12adba34 | 595 | |
ff6c30e5 | 596 | |
5f5c8ee5 GM |
597 | \f |
598 | /* Function prototypes. */ | |
599 | ||
c6e89d6c GM |
600 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
601 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
602 | static int resize_mini_window P_ ((struct window *)); | |
603 | static void clear_garbaged_frames P_ ((void)); | |
604 | static int current_message_1 P_ ((Lisp_Object *)); | |
605 | static int truncate_message_1 P_ ((int)); | |
606 | static int set_message_1 P_ ((char *s, Lisp_Object, int, int)); | |
607 | static int display_echo_area P_ ((struct window *)); | |
608 | static int display_echo_area_1 P_ ((struct window *)); | |
28514cd9 | 609 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 610 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
611 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
612 | struct text_pos)); | |
613 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
614 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
615 | static Lisp_Object eval_form P_ ((Lisp_Object)); | |
616 | static void insert_left_trunc_glyphs P_ ((struct it *)); | |
617 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
618 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
619 | static void append_space P_ ((struct it *, int)); | |
620 | static void make_cursor_line_fully_visible P_ ((struct window *)); | |
621 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
622 | static int trailing_whitespace_p P_ ((int)); | |
623 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
624 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
625 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
626 | static void push_it P_ ((struct it *)); | |
627 | static void pop_it P_ ((struct it *)); | |
628 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
629 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 630 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
631 | static void redisplay_windows P_ ((Lisp_Object)); |
632 | static void redisplay_window P_ ((Lisp_Object, int)); | |
633 | static void update_menu_bar P_ ((struct frame *, int)); | |
634 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
635 | static int try_window_id P_ ((struct window *)); | |
636 | static int display_line P_ ((struct it *)); | |
637 | static void display_mode_lines P_ ((struct window *)); | |
638 | static void display_mode_line P_ ((struct window *, enum face_id, | |
639 | Lisp_Object)); | |
640 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
641 | static char *decode_mode_spec P_ ((struct window *, char, int, int)); | |
642 | static void display_menu_bar P_ ((struct window *)); | |
643 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
644 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
645 | int, int, struct it *, int, int, int, int)); | |
646 | static void compute_line_metrics P_ ((struct it *)); | |
647 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
648 | static int get_overlay_strings P_ ((struct it *)); | |
649 | static void next_overlay_string P_ ((struct it *)); | |
650 | void set_iterator_to_next P_ ((struct it *)); | |
651 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
652 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
653 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
654 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 655 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
656 | static int next_element_from_display_vector P_ ((struct it *)); |
657 | static int next_element_from_string P_ ((struct it *)); | |
658 | static int next_element_from_c_string P_ ((struct it *)); | |
659 | static int next_element_from_buffer P_ ((struct it *)); | |
660 | static int next_element_from_image P_ ((struct it *)); | |
661 | static int next_element_from_stretch P_ ((struct it *)); | |
662 | static void load_overlay_strings P_ ((struct it *)); | |
663 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
664 | struct display_pos *)); | |
665 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
666 | Lisp_Object, int, int, int, int)); | |
667 | static int charset_at_position P_ ((struct text_pos)); | |
668 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, | |
669 | int, int, int)); | |
670 | void move_it_vertically_backward P_ ((struct it *, int)); | |
671 | static void init_to_row_start P_ ((struct it *, struct window *, | |
672 | struct glyph_row *)); | |
673 | static void init_to_row_end P_ ((struct it *, struct window *, | |
674 | struct glyph_row *)); | |
675 | static void back_to_previous_line_start P_ ((struct it *)); | |
676 | static void forward_to_next_line_start P_ ((struct it *)); | |
677 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
678 | Lisp_Object, int)); | |
679 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
680 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
681 | static int number_of_chars P_ ((unsigned char *, int)); | |
682 | static void compute_stop_pos P_ ((struct it *)); | |
683 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
684 | Lisp_Object)); | |
685 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
686 | static int next_overlay_change P_ ((int)); | |
687 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
688 | Lisp_Object, struct text_pos *)); | |
689 | ||
690 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
691 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 692 | |
5f5c8ee5 | 693 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 694 | |
5f5c8ee5 GM |
695 | static void update_toolbar P_ ((struct frame *, int)); |
696 | static void build_desired_toolbar_string P_ ((struct frame *f)); | |
697 | static int redisplay_toolbar P_ ((struct frame *)); | |
698 | static void display_toolbar_line P_ ((struct it *)); | |
12adba34 | 699 | |
5f5c8ee5 | 700 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 701 | |
5f5c8ee5 GM |
702 | \f |
703 | /*********************************************************************** | |
704 | Window display dimensions | |
705 | ***********************************************************************/ | |
12adba34 | 706 | |
5f5c8ee5 GM |
707 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
708 | text in window W. This is the height of W minus the height of a | |
709 | mode line, if any. */ | |
710 | ||
711 | INLINE int | |
712 | window_text_bottom_y (w) | |
713 | struct window *w; | |
714 | { | |
715 | struct frame *f = XFRAME (w->frame); | |
716 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
717 | ||
718 | if (WINDOW_WANTS_MODELINE_P (w)) | |
719 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
720 | return height; | |
f88eb0b6 KH |
721 | } |
722 | ||
f82aff7c | 723 | |
5f5c8ee5 GM |
724 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
725 | means return the total width of W, not including bitmap areas to | |
726 | the left and right of the window. */ | |
ff6c30e5 | 727 | |
5f5c8ee5 GM |
728 | INLINE int |
729 | window_box_width (w, area) | |
730 | struct window *w; | |
731 | int area; | |
732 | { | |
733 | struct frame *f = XFRAME (w->frame); | |
734 | int width = XFASTINT (w->width); | |
735 | ||
736 | if (!w->pseudo_window_p) | |
ff6c30e5 | 737 | { |
5f5c8ee5 GM |
738 | width -= FRAME_SCROLL_BAR_WIDTH (f) + 2 * FRAME_FLAGS_AREA_COLS (f); |
739 | ||
740 | if (area == TEXT_AREA) | |
741 | { | |
742 | if (INTEGERP (w->left_margin_width)) | |
743 | width -= XFASTINT (w->left_margin_width); | |
744 | if (INTEGERP (w->right_margin_width)) | |
745 | width -= XFASTINT (w->right_margin_width); | |
746 | } | |
747 | else if (area == LEFT_MARGIN_AREA) | |
748 | width = (INTEGERP (w->left_margin_width) | |
749 | ? XFASTINT (w->left_margin_width) : 0); | |
750 | else if (area == RIGHT_MARGIN_AREA) | |
751 | width = (INTEGERP (w->right_margin_width) | |
752 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 753 | } |
5f5c8ee5 GM |
754 | |
755 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 756 | } |
1adc55de | 757 | |
1adc55de | 758 | |
5f5c8ee5 GM |
759 | /* Return the pixel height of the display area of window W, not |
760 | including mode lines of W, if any.. */ | |
f88eb0b6 | 761 | |
5f5c8ee5 GM |
762 | INLINE int |
763 | window_box_height (w) | |
764 | struct window *w; | |
f88eb0b6 | 765 | { |
5f5c8ee5 GM |
766 | struct frame *f = XFRAME (w->frame); |
767 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
768 | ||
769 | if (WINDOW_WANTS_MODELINE_P (w)) | |
770 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
771 | ||
772 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
773 | height -= CURRENT_TOP_LINE_HEIGHT (w); | |
774 | ||
775 | return height; | |
5992c4f7 KH |
776 | } |
777 | ||
778 | ||
5f5c8ee5 GM |
779 | /* Return the frame-relative coordinate of the left edge of display |
780 | area AREA of window W. AREA < 0 means return the left edge of the | |
781 | whole window, to the right of any bitmap area at the left side of | |
782 | W. */ | |
5992c4f7 | 783 | |
5f5c8ee5 GM |
784 | INLINE int |
785 | window_box_left (w, area) | |
786 | struct window *w; | |
787 | int area; | |
90adcf20 | 788 | { |
5f5c8ee5 GM |
789 | struct frame *f = XFRAME (w->frame); |
790 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 791 | |
5f5c8ee5 | 792 | if (!w->pseudo_window_p) |
90adcf20 | 793 | { |
5f5c8ee5 GM |
794 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
795 | + FRAME_FLAGS_AREA_WIDTH (f)); | |
796 | ||
797 | if (area == TEXT_AREA) | |
798 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
799 | else if (area == RIGHT_MARGIN_AREA) | |
800 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
801 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 802 | } |
73af359d | 803 | |
5f5c8ee5 GM |
804 | return x; |
805 | } | |
90adcf20 | 806 | |
b6436d4e | 807 | |
5f5c8ee5 GM |
808 | /* Return the frame-relative coordinate of the right edge of display |
809 | area AREA of window W. AREA < 0 means return the left edge of the | |
810 | whole window, to the left of any bitmap area at the right side of | |
811 | W. */ | |
ded34426 | 812 | |
5f5c8ee5 GM |
813 | INLINE int |
814 | window_box_right (w, area) | |
815 | struct window *w; | |
816 | int area; | |
817 | { | |
818 | return window_box_left (w, area) + window_box_width (w, area); | |
819 | } | |
820 | ||
821 | ||
822 | /* Get the bounding box of the display area AREA of window W, without | |
823 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
824 | whole window, not including bitmap areas to the left and right of | |
825 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
826 | coordinates of the upper-left corner of the box. Return in | |
827 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
828 | ||
829 | INLINE void | |
830 | window_box (w, area, box_x, box_y, box_width, box_height) | |
831 | struct window *w; | |
832 | int area; | |
833 | int *box_x, *box_y, *box_width, *box_height; | |
834 | { | |
835 | struct frame *f = XFRAME (w->frame); | |
836 | ||
837 | *box_width = window_box_width (w, area); | |
838 | *box_height = window_box_height (w); | |
839 | *box_x = window_box_left (w, area); | |
840 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
841 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
842 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
843 | *box_y += CURRENT_TOP_LINE_HEIGHT (w); | |
ded34426 | 844 | } |
1adc55de | 845 | |
1adc55de | 846 | |
5f5c8ee5 GM |
847 | /* Get the bounding box of the display area AREA of window W, without |
848 | mode lines. AREA < 0 means the whole window, not including bitmap | |
849 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
850 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
851 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
852 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
853 | box. */ | |
ded34426 | 854 | |
5f5c8ee5 GM |
855 | INLINE void |
856 | window_box_edges (w, area, top_left_x, top_left_y, | |
857 | bottom_right_x, bottom_right_y) | |
858 | struct window *w; | |
859 | int area; | |
860 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 861 | { |
5f5c8ee5 GM |
862 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
863 | bottom_right_y); | |
864 | *bottom_right_x += *top_left_x; | |
865 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
866 | } |
867 | ||
5f5c8ee5 GM |
868 | |
869 | \f | |
870 | /*********************************************************************** | |
871 | Utilities | |
872 | ***********************************************************************/ | |
873 | ||
4fdb80f2 GM |
874 | /* Return the next character from STR which is MAXLEN bytes long. |
875 | Return in *LEN the length of the character. This is like | |
876 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
877 | we find one, we return a `?', but with the length of the illegal | |
878 | character. */ | |
879 | ||
880 | static INLINE int | |
7a5b8a93 | 881 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 882 | unsigned char *str; |
7a5b8a93 | 883 | int maxlen, *len; |
4fdb80f2 GM |
884 | { |
885 | int c; | |
886 | ||
887 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
888 | if (!CHAR_VALID_P (c, 1)) | |
889 | /* We may not change the length here because other places in Emacs | |
890 | don't use this function, i.e. they silently accept illegal | |
891 | characters. */ | |
892 | c = '?'; | |
893 | ||
894 | return c; | |
895 | } | |
896 | ||
897 | ||
898 | ||
5f5c8ee5 GM |
899 | /* Given a position POS containing a valid character and byte position |
900 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
901 | ||
902 | static struct text_pos | |
903 | string_pos_nchars_ahead (pos, string, nchars) | |
904 | struct text_pos pos; | |
905 | Lisp_Object string; | |
906 | int nchars; | |
0b1005ef | 907 | { |
5f5c8ee5 GM |
908 | xassert (STRINGP (string) && nchars >= 0); |
909 | ||
910 | if (STRING_MULTIBYTE (string)) | |
911 | { | |
912 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
913 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
914 | int len; | |
915 | ||
916 | while (nchars--) | |
917 | { | |
4fdb80f2 | 918 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
919 | p += len, rest -= len; |
920 | xassert (rest >= 0); | |
921 | CHARPOS (pos) += 1; | |
922 | BYTEPOS (pos) += len; | |
923 | } | |
924 | } | |
925 | else | |
926 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
927 | ||
928 | return pos; | |
0a9dc68b RS |
929 | } |
930 | ||
0a9dc68b | 931 | |
5f5c8ee5 GM |
932 | /* Value is the text position, i.e. character and byte position, |
933 | for character position CHARPOS in STRING. */ | |
934 | ||
935 | static INLINE struct text_pos | |
936 | string_pos (charpos, string) | |
937 | int charpos; | |
0a9dc68b | 938 | Lisp_Object string; |
0a9dc68b | 939 | { |
5f5c8ee5 GM |
940 | struct text_pos pos; |
941 | xassert (STRINGP (string)); | |
942 | xassert (charpos >= 0); | |
943 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
944 | return pos; | |
945 | } | |
946 | ||
947 | ||
948 | /* Value is a text position, i.e. character and byte position, for | |
949 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
950 | means recognize multibyte characters. */ | |
951 | ||
952 | static struct text_pos | |
953 | c_string_pos (charpos, s, multibyte_p) | |
954 | int charpos; | |
955 | unsigned char *s; | |
956 | int multibyte_p; | |
957 | { | |
958 | struct text_pos pos; | |
959 | ||
960 | xassert (s != NULL); | |
961 | xassert (charpos >= 0); | |
962 | ||
963 | if (multibyte_p) | |
0a9dc68b | 964 | { |
5f5c8ee5 GM |
965 | int rest = strlen (s), len; |
966 | ||
967 | SET_TEXT_POS (pos, 0, 0); | |
968 | while (charpos--) | |
0a9dc68b | 969 | { |
4fdb80f2 | 970 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
971 | s += len, rest -= len; |
972 | xassert (rest >= 0); | |
973 | CHARPOS (pos) += 1; | |
974 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
975 | } |
976 | } | |
5f5c8ee5 GM |
977 | else |
978 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 979 | |
5f5c8ee5 GM |
980 | return pos; |
981 | } | |
0a9dc68b | 982 | |
0a9dc68b | 983 | |
5f5c8ee5 GM |
984 | /* Value is the number of characters in C string S. MULTIBYTE_P |
985 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 986 | |
5f5c8ee5 GM |
987 | static int |
988 | number_of_chars (s, multibyte_p) | |
989 | unsigned char *s; | |
990 | int multibyte_p; | |
991 | { | |
992 | int nchars; | |
993 | ||
994 | if (multibyte_p) | |
995 | { | |
996 | int rest = strlen (s), len; | |
997 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 998 | |
5f5c8ee5 GM |
999 | for (nchars = 0; rest > 0; ++nchars) |
1000 | { | |
4fdb80f2 | 1001 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1002 | rest -= len, p += len; |
0a9dc68b RS |
1003 | } |
1004 | } | |
5f5c8ee5 GM |
1005 | else |
1006 | nchars = strlen (s); | |
1007 | ||
1008 | return nchars; | |
0b1005ef KH |
1009 | } |
1010 | ||
5f5c8ee5 GM |
1011 | |
1012 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1013 | NEWPOS->charpos. POS is a known position in string STRING. | |
1014 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1015 | |
5f5c8ee5 GM |
1016 | static void |
1017 | compute_string_pos (newpos, pos, string) | |
1018 | struct text_pos *newpos, pos; | |
1019 | Lisp_Object string; | |
76412d64 | 1020 | { |
5f5c8ee5 GM |
1021 | xassert (STRINGP (string)); |
1022 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1023 | ||
1024 | if (STRING_MULTIBYTE (string)) | |
1025 | *newpos = string_pos_nchars_ahead (pos, CHARPOS (*newpos) - CHARPOS (pos), | |
1026 | string); | |
1027 | else | |
1028 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1029 | } |
1030 | ||
9c74a0dd | 1031 | |
5f5c8ee5 GM |
1032 | /* Return the charset of the character at position POS in |
1033 | current_buffer. */ | |
1adc55de | 1034 | |
5f5c8ee5 GM |
1035 | static int |
1036 | charset_at_position (pos) | |
1037 | struct text_pos pos; | |
a2889657 | 1038 | { |
5f5c8ee5 GM |
1039 | int c, multibyte_p; |
1040 | unsigned char *p = BYTE_POS_ADDR (BYTEPOS (pos)); | |
1041 | ||
1042 | multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1043 | if (multibyte_p) | |
a2889657 | 1044 | { |
5f5c8ee5 GM |
1045 | int maxlen = ((BYTEPOS (pos) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) |
1046 | - BYTEPOS (pos)); | |
1047 | int len; | |
4fdb80f2 | 1048 | c = string_char_and_length (p, maxlen, &len); |
a2889657 | 1049 | } |
5f5c8ee5 GM |
1050 | else |
1051 | c = *p; | |
1052 | ||
1053 | return CHAR_CHARSET (c); | |
1054 | } | |
1055 | ||
1056 | ||
1057 | \f | |
1058 | /*********************************************************************** | |
1059 | Lisp form evaluation | |
1060 | ***********************************************************************/ | |
1061 | ||
1062 | /* Error handler for eval_form. */ | |
1063 | ||
1064 | static Lisp_Object | |
1065 | eval_handler (arg) | |
1066 | Lisp_Object arg; | |
1067 | { | |
1068 | return Qnil; | |
1069 | } | |
1070 | ||
1071 | ||
1072 | /* Evaluate SEXPR and return the result, or nil if something went | |
1073 | wrong. */ | |
1074 | ||
1075 | static Lisp_Object | |
1076 | eval_form (sexpr) | |
1077 | Lisp_Object sexpr; | |
1078 | { | |
1079 | int count = specpdl_ptr - specpdl; | |
1080 | Lisp_Object val; | |
1081 | specbind (Qinhibit_redisplay, Qt); | |
1082 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
1083 | return unbind_to (count, val); | |
1084 | } | |
1085 | ||
1086 | ||
1087 | \f | |
1088 | /*********************************************************************** | |
1089 | Debugging | |
1090 | ***********************************************************************/ | |
1091 | ||
1092 | #if 0 | |
1093 | ||
1094 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1095 | This is for debugging. It is too slow to do unconditionally. */ | |
1096 | ||
1097 | static void | |
1098 | check_it (it) | |
1099 | struct it *it; | |
1100 | { | |
1101 | if (it->method == next_element_from_string) | |
a2889657 | 1102 | { |
5f5c8ee5 GM |
1103 | xassert (STRINGP (it->string)); |
1104 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1105 | } | |
1106 | else if (it->method == next_element_from_buffer) | |
1107 | { | |
1108 | /* Check that character and byte positions agree. */ | |
1109 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1110 | } | |
73af359d | 1111 | |
5f5c8ee5 GM |
1112 | if (it->dpvec) |
1113 | xassert (it->current.dpvec_index >= 0); | |
1114 | else | |
1115 | xassert (it->current.dpvec_index < 0); | |
1116 | } | |
1f40cad2 | 1117 | |
5f5c8ee5 GM |
1118 | #define CHECK_IT(IT) check_it ((IT)) |
1119 | ||
1120 | #else /* not 0 */ | |
1121 | ||
1122 | #define CHECK_IT(IT) (void) 0 | |
1123 | ||
1124 | #endif /* not 0 */ | |
1125 | ||
1126 | ||
1127 | #if GLYPH_DEBUG | |
1128 | ||
1129 | /* Check that the window end of window W is what we expect it | |
1130 | to be---the last row in the current matrix displaying text. */ | |
1131 | ||
1132 | static void | |
1133 | check_window_end (w) | |
1134 | struct window *w; | |
1135 | { | |
1136 | if (!MINI_WINDOW_P (w) | |
1137 | && !NILP (w->window_end_valid)) | |
1138 | { | |
1139 | struct glyph_row *row; | |
1140 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1141 | XFASTINT (w->window_end_vpos)), | |
1142 | !row->enabled_p | |
1143 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1144 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1149 | ||
1150 | #else /* not GLYPH_DEBUG */ | |
1151 | ||
1152 | #define CHECK_WINDOW_END(W) (void) 0 | |
1153 | ||
1154 | #endif /* not GLYPH_DEBUG */ | |
1155 | ||
1156 | ||
1157 | \f | |
1158 | /*********************************************************************** | |
1159 | Iterator initialization | |
1160 | ***********************************************************************/ | |
1161 | ||
1162 | /* Initialize IT for displaying current_buffer in window W, starting | |
1163 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1164 | position is specified which is useful when the iterator is assigned | |
1165 | a position later. BYTEPOS is the byte position corresponding to | |
1166 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1167 | ||
1168 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1169 | will produce glyphs in that row. | |
1170 | ||
1171 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1172 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
1173 | TOP_LINE_FACE_ID for displaying mode lines, or TOOLBAR_FACE_ID for | |
1174 | displaying the toolbar. | |
1175 | ||
1176 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
1177 | TOP_LINE_FACE_ID, the iterator will be initialized to use the | |
1178 | corresponding mode line glyph row of the desired matrix of W. */ | |
1179 | ||
1180 | void | |
1181 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1182 | struct it *it; | |
1183 | struct window *w; | |
1184 | int charpos, bytepos; | |
1185 | struct glyph_row *row; | |
1186 | enum face_id base_face_id; | |
1187 | { | |
1188 | int highlight_region_p; | |
5f5c8ee5 GM |
1189 | |
1190 | /* Some precondition checks. */ | |
1191 | xassert (w != NULL && it != NULL); | |
5f5c8ee5 GM |
1192 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); |
1193 | ||
1194 | /* If face attributes have been changed since the last redisplay, | |
1195 | free realized faces now because they depend on face definitions | |
1196 | that might have changed. */ | |
1197 | if (face_change_count) | |
1198 | { | |
1199 | face_change_count = 0; | |
1200 | free_all_realized_faces (Qnil); | |
1201 | } | |
1202 | ||
1203 | /* Use one of the mode line rows of W's desired matrix if | |
1204 | appropriate. */ | |
1205 | if (row == NULL) | |
1206 | { | |
1207 | if (base_face_id == MODE_LINE_FACE_ID) | |
1208 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
1209 | else if (base_face_id == TOP_LINE_FACE_ID) | |
1210 | row = MATRIX_TOP_LINE_ROW (w->desired_matrix); | |
1211 | } | |
1212 | ||
1213 | /* Clear IT. */ | |
1214 | bzero (it, sizeof *it); | |
1215 | it->current.overlay_string_index = -1; | |
1216 | it->current.dpvec_index = -1; | |
1217 | it->charset = CHARSET_ASCII; | |
1218 | it->base_face_id = base_face_id; | |
1219 | ||
1220 | /* The window in which we iterate over current_buffer: */ | |
1221 | XSETWINDOW (it->window, w); | |
1222 | it->w = w; | |
1223 | it->f = XFRAME (w->frame); | |
1224 | ||
1225 | /* If realized faces have been removed, e.g. because of face | |
1226 | attribute changes of named faces, recompute them. */ | |
1227 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1228 | recompute_basic_faces (it->f); | |
1229 | ||
5f5c8ee5 GM |
1230 | /* Current value of the `space-width', and 'height' properties. */ |
1231 | it->space_width = Qnil; | |
1232 | it->font_height = Qnil; | |
1233 | ||
1234 | /* Are control characters displayed as `^C'? */ | |
1235 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1236 | ||
1237 | /* -1 means everything between a CR and the following line end | |
1238 | is invisible. >0 means lines indented more than this value are | |
1239 | invisible. */ | |
1240 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1241 | ? XFASTINT (current_buffer->selective_display) | |
1242 | : (!NILP (current_buffer->selective_display) | |
1243 | ? -1 : 0)); | |
1244 | it->selective_display_ellipsis_p | |
1245 | = !NILP (current_buffer->selective_display_ellipses); | |
1246 | ||
1247 | /* Display table to use. */ | |
1248 | it->dp = window_display_table (w); | |
1249 | ||
1250 | /* Are multibyte characters enabled in current_buffer? */ | |
1251 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1252 | ||
1253 | /* Non-zero if we should highlight the region. */ | |
1254 | highlight_region_p | |
1255 | = (!NILP (Vtransient_mark_mode) | |
1256 | && !NILP (current_buffer->mark_active) | |
1257 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1258 | ||
1259 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1260 | start and end of a visible region in window IT->w. Set both to | |
1261 | -1 to indicate no region. */ | |
1262 | if (highlight_region_p | |
1263 | /* Maybe highlight only in selected window. */ | |
1264 | && (/* Either show region everywhere. */ | |
1265 | highlight_nonselected_windows | |
1266 | /* Or show region in the selected window. */ | |
1267 | || w == XWINDOW (selected_window) | |
1268 | /* Or show the region if we are in the mini-buffer and W is | |
1269 | the window the mini-buffer refers to. */ | |
1270 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1271 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1272 | { | |
1273 | int charpos = marker_position (current_buffer->mark); | |
1274 | it->region_beg_charpos = min (PT, charpos); | |
1275 | it->region_end_charpos = max (PT, charpos); | |
1276 | } | |
1277 | else | |
1278 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1279 | ||
1280 | /* Get the position at which the redisplay_end_trigger hook should | |
1281 | be run, if it is to be run at all. */ | |
1282 | if (MARKERP (w->redisplay_end_trigger) | |
1283 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1284 | it->redisplay_end_trigger_charpos | |
1285 | = marker_position (w->redisplay_end_trigger); | |
1286 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1287 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1288 | ||
1289 | /* Correct bogus values of tab_width. */ | |
1290 | it->tab_width = XINT (current_buffer->tab_width); | |
1291 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1292 | it->tab_width = 8; | |
1293 | ||
1294 | /* Are lines in the display truncated? */ | |
1295 | it->truncate_lines_p | |
1296 | = (base_face_id != DEFAULT_FACE_ID | |
1297 | || XINT (it->w->hscroll) | |
1298 | || (truncate_partial_width_windows | |
1299 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1300 | || !NILP (current_buffer->truncate_lines)); | |
1301 | ||
1302 | /* Get dimensions of truncation and continuation glyphs. These are | |
1303 | displayed as bitmaps under X, so we don't need them for such | |
1304 | frames. */ | |
1305 | if (!FRAME_WINDOW_P (it->f)) | |
1306 | { | |
1307 | if (it->truncate_lines_p) | |
1308 | { | |
1309 | /* We will need the truncation glyph. */ | |
1310 | xassert (it->glyph_row == NULL); | |
1311 | produce_special_glyphs (it, IT_TRUNCATION); | |
1312 | it->truncation_pixel_width = it->pixel_width; | |
1313 | } | |
1314 | else | |
1315 | { | |
1316 | /* We will need the continuation glyph. */ | |
1317 | xassert (it->glyph_row == NULL); | |
1318 | produce_special_glyphs (it, IT_CONTINUATION); | |
1319 | it->continuation_pixel_width = it->pixel_width; | |
1320 | } | |
1321 | ||
1322 | /* Reset these values to zero becaue the produce_special_glyphs | |
1323 | above has changed them. */ | |
1324 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1325 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1326 | } |
1327 | ||
1328 | /* Set this after getting the dimensions of truncation and | |
1329 | continuation glyphs, so that we don't produce glyphs when calling | |
1330 | produce_special_glyphs, above. */ | |
1331 | it->glyph_row = row; | |
1332 | it->area = TEXT_AREA; | |
1333 | ||
1334 | /* Get the dimensions of the display area. The display area | |
1335 | consists of the visible window area plus a horizontally scrolled | |
1336 | part to the left of the window. All x-values are relative to the | |
1337 | start of this total display area. */ | |
1338 | if (base_face_id != DEFAULT_FACE_ID) | |
1339 | { | |
1340 | /* Mode lines, menu bar in terminal frames. */ | |
1341 | it->first_visible_x = 0; | |
1342 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | it->first_visible_x | |
1347 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1348 | it->last_visible_x = (it->first_visible_x | |
1349 | + window_box_width (w, TEXT_AREA)); | |
1350 | ||
1351 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1352 | the right margin. Otherwise, leave room for the continuation | |
1353 | glyph(s). Truncation and continuation glyphs are not inserted | |
1354 | for window-based redisplay. */ | |
1355 | if (!FRAME_WINDOW_P (it->f)) | |
1356 | { | |
1357 | if (it->truncate_lines_p) | |
1358 | it->last_visible_x -= it->truncation_pixel_width; | |
1359 | else | |
1360 | it->last_visible_x -= it->continuation_pixel_width; | |
1361 | } | |
1362 | ||
1363 | it->top_line_p = WINDOW_WANTS_TOP_LINE_P (w); | |
1364 | it->current_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w) + w->vscroll; | |
1365 | } | |
1366 | ||
1367 | /* Leave room for a border glyph. */ | |
1368 | if (!FRAME_WINDOW_P (it->f) | |
1369 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1370 | it->last_visible_x -= 1; | |
1371 | ||
1372 | it->last_visible_y = window_text_bottom_y (w); | |
1373 | ||
1374 | /* For mode lines and alike, arrange for the first glyph having a | |
1375 | left box line if the face specifies a box. */ | |
1376 | if (base_face_id != DEFAULT_FACE_ID) | |
1377 | { | |
1378 | struct face *face; | |
1379 | ||
1380 | it->face_id = base_face_id; | |
1381 | ||
1382 | /* If we have a boxed mode line, make the first character appear | |
1383 | with a left box line. */ | |
1384 | face = FACE_FROM_ID (it->f, base_face_id); | |
1385 | if (face->box != FACE_NO_BOX) | |
1386 | it->start_of_box_run_p = 1; | |
1387 | } | |
1388 | ||
1389 | /* If a buffer position was specified, set the iterator there, | |
1390 | getting overlays and face properties from that position. */ | |
1391 | if (charpos > 0) | |
1392 | { | |
1393 | it->end_charpos = ZV; | |
1394 | it->face_id = -1; | |
1395 | IT_CHARPOS (*it) = charpos; | |
1396 | ||
1397 | /* Compute byte position if not specified. */ | |
1398 | if (bytepos <= 0) | |
1399 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1400 | else | |
1401 | IT_BYTEPOS (*it) = bytepos; | |
1402 | ||
1403 | /* Compute faces etc. */ | |
1404 | reseat (it, it->current.pos, 1); | |
1405 | } | |
1406 | ||
1407 | CHECK_IT (it); | |
1408 | } | |
1409 | ||
1410 | ||
1411 | /* Initialize IT for the display of window W with window start POS. */ | |
1412 | ||
1413 | void | |
1414 | start_display (it, w, pos) | |
1415 | struct it *it; | |
1416 | struct window *w; | |
1417 | struct text_pos pos; | |
1418 | { | |
1419 | int start_at_line_beg_p; | |
1420 | struct glyph_row *row; | |
1421 | int first_vpos = WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0; | |
1422 | int first_y; | |
1423 | ||
1424 | row = w->desired_matrix->rows + first_vpos; | |
1425 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1426 | first_y = it->current_y; | |
1427 | ||
1428 | /* If window start is not at a line start, move back to the line | |
1429 | start. This makes sure that we take continuation lines into | |
1430 | account. */ | |
1431 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1432 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1433 | if (!start_at_line_beg_p) | |
1434 | reseat_at_previous_visible_line_start (it); | |
1435 | ||
5f5c8ee5 GM |
1436 | /* If window start is not at a line start, skip forward to POS to |
1437 | get the correct continuation_lines_width and current_x. */ | |
1438 | if (!start_at_line_beg_p) | |
1439 | { | |
1440 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1441 | ||
1442 | /* If lines are continued, this line may end in the middle of a | |
1443 | multi-glyph character (e.g. a control character displayed as | |
1444 | \003, or in the middle of an overlay string). In this case | |
1445 | move_it_to above will not have taken us to the start of | |
1446 | the continuation line but to the end of the continued line. */ | |
1447 | if (!it->truncate_lines_p && it->current_x > 0) | |
1448 | { | |
1449 | if (it->current.dpvec_index >= 0 | |
1450 | || it->current.overlay_string_index >= 0) | |
1451 | { | |
1452 | set_iterator_to_next (it); | |
1453 | move_it_in_display_line_to (it, -1, -1, 0); | |
1454 | } | |
1455 | it->continuation_lines_width += it->current_x; | |
1456 | } | |
1457 | ||
1458 | it->current_y = first_y; | |
1459 | it->vpos = 0; | |
1460 | it->current_x = it->hpos = 0; | |
1461 | } | |
1462 | ||
1463 | #if 0 /* Don't assert the following because start_display is sometimes | |
1464 | called intentionally with a window start that is not at a | |
1465 | line start. Please leave this code in as a comment. */ | |
1466 | ||
1467 | /* Window start should be on a line start, now. */ | |
1468 | xassert (it->continuation_lines_width | |
1469 | || IT_CHARPOS (it) == BEGV | |
1470 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1471 | #endif /* 0 */ | |
1472 | } | |
1473 | ||
1474 | ||
1475 | /* Initialize IT for stepping through current_buffer in window W, | |
1476 | starting at position POS that includes overlay string and display | |
1477 | vector/ control character translation position information. */ | |
1478 | ||
1479 | static void | |
1480 | init_from_display_pos (it, w, pos) | |
1481 | struct it *it; | |
1482 | struct window *w; | |
1483 | struct display_pos *pos; | |
1484 | { | |
1485 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1486 | text, so we might end up at a position different from POS. This | |
1487 | is only a problem when POS is a row start after a newline and an | |
1488 | overlay starts there with an after-string, and the overlay has an | |
1489 | invisible property. Since we don't skip invisible text in | |
1490 | display_line and elsewhere immediately after consuming the | |
1491 | newline before the row start, such a POS will not be in a string, | |
1492 | but the call to init_iterator below will move us to the | |
1493 | after-string. */ | |
1494 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1495 | NULL, DEFAULT_FACE_ID); | |
1496 | ||
1497 | /* If position is within an overlay string, set up IT to | |
1498 | the right overlay string. */ | |
1499 | if (pos->overlay_string_index >= 0) | |
1500 | { | |
1501 | int relative_index; | |
1502 | ||
1503 | /* We already have the first chunk of overlay strings in | |
1504 | IT->overlay_strings. Load more until the one for | |
1505 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1506 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1507 | { | |
1508 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1509 | it->current.overlay_string_index = 0; | |
1510 | while (n--) | |
1511 | { | |
1512 | load_overlay_strings (it); | |
1513 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | it->current.overlay_string_index = pos->overlay_string_index; | |
1518 | relative_index = (it->current.overlay_string_index | |
1519 | % OVERLAY_STRING_CHUNK_SIZE); | |
1520 | it->string = it->overlay_strings[relative_index]; | |
1521 | it->current.string_pos = pos->string_pos; | |
1522 | it->method = next_element_from_string; | |
1523 | } | |
1524 | else if (CHARPOS (pos->string_pos) >= 0) | |
1525 | { | |
1526 | /* Recorded position is not in an overlay string, but in another | |
1527 | string. This can only be a string from a `display' property. | |
1528 | IT should already be filled with that string. */ | |
1529 | it->current.string_pos = pos->string_pos; | |
1530 | xassert (STRINGP (it->string)); | |
1531 | } | |
1532 | ||
1533 | /* Restore position in display vector translations or control | |
1534 | character translations. */ | |
1535 | if (pos->dpvec_index >= 0) | |
1536 | { | |
1537 | /* This fills IT->dpvec. */ | |
1538 | get_next_display_element (it); | |
1539 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1540 | it->current.dpvec_index = pos->dpvec_index; | |
1541 | } | |
1542 | ||
1543 | CHECK_IT (it); | |
1544 | } | |
1545 | ||
1546 | ||
1547 | /* Initialize IT for stepping through current_buffer in window W | |
1548 | starting at ROW->start. */ | |
1549 | ||
1550 | static void | |
1551 | init_to_row_start (it, w, row) | |
1552 | struct it *it; | |
1553 | struct window *w; | |
1554 | struct glyph_row *row; | |
1555 | { | |
1556 | init_from_display_pos (it, w, &row->start); | |
1557 | it->continuation_lines_width = row->continuation_lines_width; | |
1558 | CHECK_IT (it); | |
1559 | } | |
1560 | ||
1561 | ||
1562 | /* Initialize IT for stepping through current_buffer in window W | |
1563 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1564 | ||
1565 | static void | |
1566 | init_to_row_end (it, w, row) | |
1567 | struct it *it; | |
1568 | struct window *w; | |
1569 | struct glyph_row *row; | |
1570 | { | |
1571 | init_from_display_pos (it, w, &row->end); | |
1572 | ||
1573 | if (row->continued_p) | |
1574 | it->continuation_lines_width = (row->continuation_lines_width | |
1575 | + row->pixel_width); | |
1576 | CHECK_IT (it); | |
1577 | } | |
1578 | ||
1579 | ||
1580 | ||
1581 | \f | |
1582 | /*********************************************************************** | |
1583 | Text properties | |
1584 | ***********************************************************************/ | |
1585 | ||
1586 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1587 | overlay changes. Set IT->stop_charpos to the next position where | |
1588 | to stop. */ | |
1589 | ||
1590 | static void | |
1591 | handle_stop (it) | |
1592 | struct it *it; | |
1593 | { | |
1594 | enum prop_handled handled; | |
1595 | int handle_overlay_change_p = 1; | |
1596 | struct props *p; | |
1597 | ||
1598 | it->dpvec = NULL; | |
1599 | it->current.dpvec_index = -1; | |
1600 | ||
1601 | do | |
1602 | { | |
1603 | handled = HANDLED_NORMALLY; | |
1604 | ||
1605 | /* Call text property handlers. */ | |
1606 | for (p = it_props; p->handler; ++p) | |
1607 | { | |
1608 | handled = p->handler (it); | |
1609 | ||
1610 | if (handled == HANDLED_RECOMPUTE_PROPS) | |
1611 | break; | |
1612 | else if (handled == HANDLED_RETURN) | |
1613 | return; | |
1614 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1615 | handle_overlay_change_p = 0; | |
1616 | } | |
1617 | ||
1618 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1619 | { | |
1620 | /* Don't check for overlay strings below when set to deliver | |
1621 | characters from a display vector. */ | |
1622 | if (it->method == next_element_from_display_vector) | |
1623 | handle_overlay_change_p = 0; | |
1624 | ||
1625 | /* Handle overlay changes. */ | |
1626 | if (handle_overlay_change_p) | |
1627 | handled = handle_overlay_change (it); | |
1628 | ||
1629 | /* Determine where to stop next. */ | |
1630 | if (handled == HANDLED_NORMALLY) | |
1631 | compute_stop_pos (it); | |
1632 | } | |
1633 | } | |
1634 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1635 | } | |
1636 | ||
1637 | ||
1638 | /* Compute IT->stop_charpos from text property and overlay change | |
1639 | information for IT's current position. */ | |
1640 | ||
1641 | static void | |
1642 | compute_stop_pos (it) | |
1643 | struct it *it; | |
1644 | { | |
1645 | register INTERVAL iv, next_iv; | |
1646 | Lisp_Object object, limit, position; | |
1647 | ||
1648 | /* If nowhere else, stop at the end. */ | |
1649 | it->stop_charpos = it->end_charpos; | |
1650 | ||
1651 | if (STRINGP (it->string)) | |
1652 | { | |
1653 | /* Strings are usually short, so don't limit the search for | |
1654 | properties. */ | |
1655 | object = it->string; | |
1656 | limit = Qnil; | |
1657 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | int charpos; | |
1662 | ||
1663 | /* If next overlay change is in front of the current stop pos | |
1664 | (which is IT->end_charpos), stop there. Note: value of | |
1665 | next_overlay_change is point-max if no overlay change | |
1666 | follows. */ | |
1667 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1668 | if (charpos < it->stop_charpos) | |
1669 | it->stop_charpos = charpos; | |
1670 | ||
1671 | /* If showing the region, we have to stop at the region | |
1672 | start or end because the face might change there. */ | |
1673 | if (it->region_beg_charpos > 0) | |
1674 | { | |
1675 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1676 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1677 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1678 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1679 | } | |
1680 | ||
1681 | /* Set up variables for computing the stop position from text | |
1682 | property changes. */ | |
1683 | XSETBUFFER (object, current_buffer); | |
1684 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1685 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1686 | ||
1687 | } | |
1688 | ||
1689 | /* Get the interval containing IT's position. Value is a null | |
1690 | interval if there isn't such an interval. */ | |
1691 | iv = validate_interval_range (object, &position, &position, 0); | |
1692 | if (!NULL_INTERVAL_P (iv)) | |
1693 | { | |
1694 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1695 | struct props *p; | |
1696 | ||
1697 | /* Get properties here. */ | |
1698 | for (p = it_props; p->handler; ++p) | |
1699 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1700 | ||
1701 | /* Look for an interval following iv that has different | |
1702 | properties. */ | |
1703 | for (next_iv = next_interval (iv); | |
1704 | (!NULL_INTERVAL_P (next_iv) | |
1705 | && (NILP (limit) | |
1706 | || XFASTINT (limit) > next_iv->position)); | |
1707 | next_iv = next_interval (next_iv)) | |
1708 | { | |
1709 | for (p = it_props; p->handler; ++p) | |
1710 | { | |
1711 | Lisp_Object new_value; | |
1712 | ||
1713 | new_value = textget (next_iv->plist, *p->name); | |
1714 | if (!EQ (values_here[p->idx], new_value)) | |
1715 | break; | |
1716 | } | |
1717 | ||
1718 | if (p->handler) | |
1719 | break; | |
1720 | } | |
1721 | ||
1722 | if (!NULL_INTERVAL_P (next_iv)) | |
1723 | { | |
1724 | if (INTEGERP (limit) | |
1725 | && next_iv->position >= XFASTINT (limit)) | |
1726 | /* No text property change up to limit. */ | |
1727 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1728 | else | |
1729 | /* Text properties change in next_iv. */ | |
1730 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | xassert (STRINGP (it->string) | |
1735 | || (it->stop_charpos >= BEGV | |
1736 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1737 | } | |
1738 | ||
1739 | ||
1740 | /* Return the position of the next overlay change after POS in | |
1741 | current_buffer. Value is point-max if no overlay change | |
1742 | follows. This is like `next-overlay-change' but doesn't use | |
1743 | xmalloc. */ | |
1744 | ||
1745 | static int | |
1746 | next_overlay_change (pos) | |
1747 | int pos; | |
1748 | { | |
1749 | int noverlays; | |
1750 | int endpos; | |
1751 | Lisp_Object *overlays; | |
1752 | int len; | |
1753 | int i; | |
1754 | ||
1755 | /* Get all overlays at the given position. */ | |
1756 | len = 10; | |
1757 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1758 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1759 | if (noverlays > len) | |
1760 | { | |
1761 | len = noverlays; | |
1762 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1763 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1764 | } | |
1765 | ||
1766 | /* If any of these overlays ends before endpos, | |
1767 | use its ending point instead. */ | |
1768 | for (i = 0; i < noverlays; ++i) | |
1769 | { | |
1770 | Lisp_Object oend; | |
1771 | int oendpos; | |
1772 | ||
1773 | oend = OVERLAY_END (overlays[i]); | |
1774 | oendpos = OVERLAY_POSITION (oend); | |
1775 | endpos = min (endpos, oendpos); | |
1776 | } | |
1777 | ||
1778 | return endpos; | |
1779 | } | |
1780 | ||
1781 | ||
1782 | \f | |
1783 | /*********************************************************************** | |
1784 | Fontification | |
1785 | ***********************************************************************/ | |
1786 | ||
1787 | /* Handle changes in the `fontified' property of the current buffer by | |
1788 | calling hook functions from Qfontification_functions to fontify | |
1789 | regions of text. */ | |
1790 | ||
1791 | static enum prop_handled | |
1792 | handle_fontified_prop (it) | |
1793 | struct it *it; | |
1794 | { | |
1795 | Lisp_Object prop, pos; | |
1796 | enum prop_handled handled = HANDLED_NORMALLY; | |
1797 | ||
1798 | /* Get the value of the `fontified' property at IT's current buffer | |
1799 | position. (The `fontified' property doesn't have a special | |
1800 | meaning in strings.) If the value is nil, call functions from | |
1801 | Qfontification_functions. */ | |
1802 | if (!STRINGP (it->string) | |
1803 | && it->s == NULL | |
1804 | && !NILP (Vfontification_functions) | |
1805 | && (pos = make_number (IT_CHARPOS (*it)), | |
1806 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1807 | NILP (prop))) | |
1808 | { | |
1809 | Lisp_Object args[2]; | |
1810 | ||
1811 | /* Run the hook functions. */ | |
1812 | args[0] = Qfontification_functions; | |
1813 | args[1] = pos; | |
1814 | Frun_hook_with_args (make_number (2), args); | |
1815 | ||
1816 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1817 | something. This avoids an endless loop if they failed to | |
1818 | fontify the text for which reason ever. */ | |
1819 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1820 | handled = HANDLED_RECOMPUTE_PROPS; | |
1821 | } | |
1822 | ||
1823 | return handled; | |
1824 | } | |
1825 | ||
1826 | ||
1827 | \f | |
1828 | /*********************************************************************** | |
1829 | Faces | |
1830 | ***********************************************************************/ | |
1831 | ||
1832 | /* Set up iterator IT from face properties at its current position. | |
1833 | Called from handle_stop. */ | |
1834 | ||
1835 | static enum prop_handled | |
1836 | handle_face_prop (it) | |
1837 | struct it *it; | |
1838 | { | |
1839 | int new_face_id, next_stop; | |
1840 | ||
1841 | if (!STRINGP (it->string)) | |
1842 | { | |
1843 | new_face_id | |
1844 | = face_at_buffer_position (it->w, | |
1845 | IT_CHARPOS (*it), | |
1846 | it->region_beg_charpos, | |
1847 | it->region_end_charpos, | |
1848 | &next_stop, | |
1849 | (IT_CHARPOS (*it) | |
1850 | + TEXT_PROP_DISTANCE_LIMIT), | |
1851 | 0); | |
1852 | ||
1853 | /* Is this a start of a run of characters with box face? | |
1854 | Caveat: this can be called for a freshly initialized | |
1855 | iterator; face_id is -1 is this case. We know that the new | |
1856 | face will not change until limit, i.e. if the new face has a | |
1857 | box, all characters up to limit will have one. But, as | |
1858 | usual, we don't know whether limit is really the end. */ | |
1859 | if (new_face_id != it->face_id) | |
1860 | { | |
1861 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1862 | ||
1863 | /* If new face has a box but old face has not, this is | |
1864 | the start of a run of characters with box, i.e. it has | |
1865 | a shadow on the left side. The value of face_id of the | |
1866 | iterator will be -1 if this is the initial call that gets | |
1867 | the face. In this case, we have to look in front of IT's | |
1868 | position and see whether there is a face != new_face_id. */ | |
1869 | it->start_of_box_run_p | |
1870 | = (new_face->box != FACE_NO_BOX | |
1871 | && (it->face_id >= 0 | |
1872 | || IT_CHARPOS (*it) == BEG | |
1873 | || new_face_id != face_before_it_pos (it))); | |
1874 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1875 | } | |
1876 | } | |
1877 | else | |
1878 | { | |
1879 | new_face_id | |
1880 | = face_at_string_position (it->w, | |
1881 | it->string, | |
1882 | IT_STRING_CHARPOS (*it), | |
1883 | (it->current.overlay_string_index >= 0 | |
1884 | ? IT_CHARPOS (*it) | |
1885 | : 0), | |
1886 | it->region_beg_charpos, | |
1887 | it->region_end_charpos, | |
1888 | &next_stop, | |
1889 | it->base_face_id); | |
1890 | ||
1891 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
1892 | /* If IT is used to display a mode line we would really like to | |
1893 | use the mode line face instead of the frame's default face. */ | |
1894 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
1895 | && new_face_id == DEFAULT_FACE_ID) | |
1896 | new_face_id = MODE_LINE_FACE_ID; | |
1897 | #endif | |
1898 | ||
1899 | /* Is this a start of a run of characters with box? Caveat: | |
1900 | this can be called for a freshly allocated iterator; face_id | |
1901 | is -1 is this case. We know that the new face will not | |
1902 | change until the next check pos, i.e. if the new face has a | |
1903 | box, all characters up to that position will have a | |
1904 | box. But, as usual, we don't know whether that position | |
1905 | is really the end. */ | |
1906 | if (new_face_id != it->face_id) | |
1907 | { | |
1908 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1909 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
1910 | ||
1911 | /* If new face has a box but old face hasn't, this is the | |
1912 | start of a run of characters with box, i.e. it has a | |
1913 | shadow on the left side. */ | |
1914 | it->start_of_box_run_p | |
1915 | = new_face->box && (old_face == NULL || !old_face->box); | |
1916 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | it->face_id = new_face_id; | |
1921 | it->charset = CHARSET_ASCII; | |
1922 | return HANDLED_NORMALLY; | |
1923 | } | |
1924 | ||
1925 | ||
1926 | /* Compute the face one character before or after the current position | |
1927 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
1928 | position. Value is the id of the face. */ | |
1929 | ||
1930 | static int | |
1931 | face_before_or_after_it_pos (it, before_p) | |
1932 | struct it *it; | |
1933 | int before_p; | |
1934 | { | |
1935 | int face_id, limit; | |
1936 | int next_check_charpos; | |
1937 | struct text_pos pos; | |
1938 | ||
1939 | xassert (it->s == NULL); | |
1940 | ||
1941 | if (STRINGP (it->string)) | |
1942 | { | |
1943 | /* No face change past the end of the string (for the case | |
1944 | we are padding with spaces). No face change before the | |
1945 | string start. */ | |
1946 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
1947 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
1948 | return it->face_id; | |
1949 | ||
1950 | /* Set pos to the position before or after IT's current position. */ | |
1951 | if (before_p) | |
1952 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
1953 | else | |
1954 | pos = string_pos (IT_STRING_CHARPOS (*it) + 1, it->string); | |
1955 | ||
1956 | /* Get the face for ASCII, or unibyte. */ | |
1957 | face_id | |
1958 | = face_at_string_position (it->w, | |
1959 | it->string, | |
1960 | CHARPOS (pos), | |
1961 | (it->current.overlay_string_index >= 0 | |
1962 | ? IT_CHARPOS (*it) | |
1963 | : 0), | |
1964 | it->region_beg_charpos, | |
1965 | it->region_end_charpos, | |
1966 | &next_check_charpos, | |
1967 | it->base_face_id); | |
1968 | ||
1969 | /* Correct the face for charsets different from ASCII. Do it | |
1970 | for the multibyte case only. The face returned above is | |
1971 | suitable for unibyte text if IT->string is unibyte. */ | |
1972 | if (STRING_MULTIBYTE (it->string)) | |
1973 | { | |
1974 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
1975 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
1976 | int c, len, charset; | |
1977 | ||
4fdb80f2 | 1978 | c = string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1979 | charset = CHAR_CHARSET (c); |
1980 | if (charset != CHARSET_ASCII) | |
1981 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
1982 | } | |
1983 | } | |
1984 | else | |
1985 | { | |
70851746 GM |
1986 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
1987 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
1988 | return it->face_id; | |
1989 | ||
5f5c8ee5 GM |
1990 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
1991 | pos = it->current.pos; | |
1992 | ||
1993 | if (before_p) | |
1994 | DEC_TEXT_POS (pos); | |
1995 | else | |
1996 | INC_TEXT_POS (pos); | |
70851746 | 1997 | |
5f5c8ee5 GM |
1998 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
1999 | face_id = face_at_buffer_position (it->w, | |
2000 | CHARPOS (pos), | |
2001 | it->region_beg_charpos, | |
2002 | it->region_end_charpos, | |
2003 | &next_check_charpos, | |
2004 | limit, 0); | |
2005 | ||
2006 | /* Correct the face for charsets different from ASCII. Do it | |
2007 | for the multibyte case only. The face returned above is | |
2008 | suitable for unibyte text if current_buffer is unibyte. */ | |
2009 | if (it->multibyte_p) | |
2010 | { | |
2011 | int charset = charset_at_position (pos); | |
2012 | if (charset != CHARSET_ASCII) | |
2013 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
2014 | } | |
2015 | } | |
2016 | ||
2017 | return face_id; | |
2018 | } | |
2019 | ||
2020 | ||
2021 | \f | |
2022 | /*********************************************************************** | |
2023 | Invisible text | |
2024 | ***********************************************************************/ | |
2025 | ||
2026 | /* Set up iterator IT from invisible properties at its current | |
2027 | position. Called from handle_stop. */ | |
2028 | ||
2029 | static enum prop_handled | |
2030 | handle_invisible_prop (it) | |
2031 | struct it *it; | |
2032 | { | |
2033 | enum prop_handled handled = HANDLED_NORMALLY; | |
2034 | ||
2035 | if (STRINGP (it->string)) | |
2036 | { | |
2037 | extern Lisp_Object Qinvisible; | |
2038 | Lisp_Object prop, end_charpos, limit, charpos; | |
2039 | ||
2040 | /* Get the value of the invisible text property at the | |
2041 | current position. Value will be nil if there is no such | |
2042 | property. */ | |
2043 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2044 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2045 | ||
2046 | if (!NILP (prop)) | |
2047 | { | |
2048 | handled = HANDLED_RECOMPUTE_PROPS; | |
2049 | ||
2050 | /* Get the position at which the next change of the | |
2051 | invisible text property can be found in IT->string. | |
2052 | Value will be nil if the property value is the same for | |
2053 | all the rest of IT->string. */ | |
2054 | XSETINT (limit, XSTRING (it->string)->size); | |
2055 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2056 | it->string, limit); | |
2057 | ||
2058 | /* Text at current position is invisible. The next | |
2059 | change in the property is at position end_charpos. | |
2060 | Move IT's current position to that position. */ | |
2061 | if (INTEGERP (end_charpos) | |
2062 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2063 | { | |
2064 | struct text_pos old; | |
2065 | old = it->current.string_pos; | |
2066 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2067 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2068 | } | |
2069 | else | |
2070 | { | |
2071 | /* The rest of the string is invisible. If this is an | |
2072 | overlay string, proceed with the next overlay string | |
2073 | or whatever comes and return a character from there. */ | |
2074 | if (it->current.overlay_string_index >= 0) | |
2075 | { | |
2076 | next_overlay_string (it); | |
2077 | /* Don't check for overlay strings when we just | |
2078 | finished processing them. */ | |
2079 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2080 | } | |
2081 | else | |
2082 | { | |
2083 | struct Lisp_String *s = XSTRING (it->string); | |
2084 | IT_STRING_CHARPOS (*it) = s->size; | |
2085 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2086 | } | |
2087 | } | |
2088 | } | |
2089 | } | |
2090 | else | |
2091 | { | |
2092 | int visible_p, newpos, next_stop; | |
2093 | Lisp_Object pos, prop; | |
2094 | ||
2095 | /* First of all, is there invisible text at this position? */ | |
2096 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2097 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2098 | ||
2099 | /* If we are on invisible text, skip over it. */ | |
2100 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2101 | { | |
2102 | /* Record whether we have to display an ellipsis for the | |
2103 | invisible text. */ | |
2104 | int display_ellipsis_p | |
2105 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2106 | ||
2107 | handled = HANDLED_RECOMPUTE_PROPS; | |
2108 | ||
2109 | /* Loop skipping over invisible text. The loop is left at | |
2110 | ZV or with IT on the first char being visible again. */ | |
2111 | do | |
2112 | { | |
2113 | /* Try to skip some invisible text. Return value is the | |
2114 | position reached which can be equal to IT's position | |
2115 | if there is nothing invisible here. This skips both | |
2116 | over invisible text properties and overlays with | |
2117 | invisible property. */ | |
2118 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2119 | &next_stop, ZV, it->window); | |
2120 | ||
2121 | /* If we skipped nothing at all we weren't at invisible | |
2122 | text in the first place. If everything to the end of | |
2123 | the buffer was skipped, end the loop. */ | |
2124 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2125 | visible_p = 1; | |
2126 | else | |
2127 | { | |
2128 | /* We skipped some characters but not necessarily | |
2129 | all there are. Check if we ended up on visible | |
2130 | text. Fget_char_property returns the property of | |
2131 | the char before the given position, i.e. if we | |
2132 | get visible_p = 1, this means that the char at | |
2133 | newpos is visible. */ | |
2134 | XSETFASTINT (pos, newpos); | |
2135 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2136 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2137 | } | |
2138 | ||
2139 | /* If we ended up on invisible text, proceed to | |
2140 | skip starting with next_stop. */ | |
2141 | if (!visible_p) | |
2142 | IT_CHARPOS (*it) = next_stop; | |
2143 | } | |
2144 | while (!visible_p); | |
2145 | ||
2146 | /* The position newpos is now either ZV or on visible text. */ | |
2147 | IT_CHARPOS (*it) = newpos; | |
2148 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2149 | ||
2150 | /* Maybe return `...' next for the end of the invisible text. */ | |
2151 | if (display_ellipsis_p) | |
2152 | { | |
2153 | if (it->dp | |
2154 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2155 | { | |
2156 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2157 | it->dpvec = v->contents; | |
2158 | it->dpend = v->contents + v->size; | |
2159 | } | |
2160 | else | |
2161 | { | |
2162 | /* Default `...'. */ | |
2163 | it->dpvec = default_invis_vector; | |
2164 | it->dpend = default_invis_vector + 3; | |
2165 | } | |
2166 | ||
2167 | /* The ellipsis display does not replace the display of | |
2168 | the character at the new position. Indicate this by | |
2169 | setting IT->dpvec_char_len to zero. */ | |
2170 | it->dpvec_char_len = 0; | |
2171 | ||
2172 | it->current.dpvec_index = 0; | |
2173 | it->method = next_element_from_display_vector; | |
2174 | } | |
2175 | } | |
2176 | } | |
2177 | ||
2178 | return handled; | |
2179 | } | |
2180 | ||
2181 | ||
2182 | \f | |
2183 | /*********************************************************************** | |
2184 | 'display' property | |
2185 | ***********************************************************************/ | |
2186 | ||
2187 | /* Set up iterator IT from `display' property at its current position. | |
2188 | Called from handle_stop. */ | |
2189 | ||
2190 | static enum prop_handled | |
2191 | handle_display_prop (it) | |
2192 | struct it *it; | |
2193 | { | |
2194 | Lisp_Object prop, object; | |
2195 | struct text_pos *position; | |
2196 | int space_or_image_found_p; | |
2197 | ||
2198 | if (STRINGP (it->string)) | |
2199 | { | |
2200 | object = it->string; | |
2201 | position = &it->current.string_pos; | |
2202 | } | |
2203 | else | |
2204 | { | |
2205 | object = Qnil; | |
2206 | position = &it->current.pos; | |
2207 | } | |
2208 | ||
2209 | /* Reset those iterator values set from display property values. */ | |
2210 | it->font_height = Qnil; | |
2211 | it->space_width = Qnil; | |
2212 | it->voffset = 0; | |
2213 | ||
2214 | /* We don't support recursive `display' properties, i.e. string | |
2215 | values that have a string `display' property, that have a string | |
2216 | `display' property etc. */ | |
2217 | if (!it->string_from_display_prop_p) | |
2218 | it->area = TEXT_AREA; | |
2219 | ||
2220 | prop = Fget_char_property (make_number (position->charpos), | |
2221 | Qdisplay, object); | |
2222 | if (NILP (prop)) | |
2223 | return HANDLED_NORMALLY; | |
2224 | ||
2225 | space_or_image_found_p = 0; | |
2226 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
2227 | { | |
2228 | while (CONSP (prop)) | |
2229 | { | |
2230 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2231 | space_or_image_found_p = 1; | |
2232 | prop = XCDR (prop); | |
2233 | } | |
2234 | } | |
2235 | else if (VECTORP (prop)) | |
2236 | { | |
2237 | int i; | |
2238 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2239 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2240 | object, position)) | |
2241 | space_or_image_found_p = 1; | |
2242 | } | |
2243 | else | |
2244 | { | |
2245 | if (handle_single_display_prop (it, prop, object, position)) | |
2246 | space_or_image_found_p = 1; | |
2247 | } | |
2248 | ||
2249 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2250 | } | |
2251 | ||
2252 | ||
2253 | /* Value is the position of the end of the `display' property stating | |
2254 | at START_POS in OBJECT. */ | |
2255 | ||
2256 | static struct text_pos | |
2257 | display_prop_end (it, object, start_pos) | |
2258 | struct it *it; | |
2259 | Lisp_Object object; | |
2260 | struct text_pos start_pos; | |
2261 | { | |
2262 | Lisp_Object end; | |
2263 | struct text_pos end_pos; | |
2264 | ||
2265 | /* Characters having this form of property are not displayed, so | |
2266 | we have to find the end of the property. */ | |
2267 | end = Fnext_single_property_change (make_number (start_pos.charpos), | |
2268 | Qdisplay, object, Qnil); | |
2269 | if (NILP (end)) | |
2270 | { | |
2271 | /* A nil value of `end' means there are no changes of the | |
2272 | property to the end of the buffer or string. */ | |
2273 | if (it->current.overlay_string_index >= 0) | |
2274 | end_pos.charpos = XSTRING (it->string)->size; | |
2275 | else | |
2276 | end_pos.charpos = it->end_charpos; | |
2277 | } | |
2278 | else | |
2279 | end_pos.charpos = XFASTINT (end); | |
2280 | ||
2281 | if (STRINGP (it->string)) | |
2282 | compute_string_pos (&end_pos, start_pos, it->string); | |
2283 | else | |
2284 | end_pos.bytepos = CHAR_TO_BYTE (end_pos.charpos); | |
2285 | ||
2286 | return end_pos; | |
2287 | } | |
2288 | ||
2289 | ||
2290 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2291 | is the object in which the `display' property was found. *POSITION | |
2292 | is the position at which it was found. | |
2293 | ||
2294 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2295 | end position of the `display' property. | |
2296 | ||
2297 | Value is non-zero if a `space' or `image' property value was found. */ | |
2298 | ||
2299 | static int | |
2300 | handle_single_display_prop (it, prop, object, position) | |
2301 | struct it *it; | |
2302 | Lisp_Object prop; | |
2303 | Lisp_Object object; | |
2304 | struct text_pos *position; | |
2305 | { | |
2306 | Lisp_Object value; | |
2307 | int space_or_image_found_p = 0; | |
2308 | ||
2309 | Lisp_Object form; | |
2310 | ||
2311 | /* If PROP is a list of the form `(:when FORM VALUE)', FORM is | |
2312 | evaluated. If the result is nil, VALUE is ignored. */ | |
2313 | form = Qt; | |
2314 | if (CONSP (prop) && EQ (XCAR (prop), QCwhen)) | |
2315 | { | |
2316 | prop = XCDR (prop); | |
2317 | if (!CONSP (prop)) | |
2318 | return 0; | |
2319 | form = XCAR (prop); | |
2320 | prop = XCDR (prop); | |
2321 | if (!CONSP (prop)) | |
2322 | return 0; | |
2323 | prop = XCAR (prop); | |
2324 | } | |
2325 | ||
2326 | if (!NILP (form) && !EQ (form, Qt)) | |
2327 | { | |
2328 | struct gcpro gcpro1; | |
2329 | struct text_pos end_pos, pt; | |
2330 | ||
2331 | end_pos = display_prop_end (it, object, *position); | |
2332 | GCPRO1 (form); | |
2333 | ||
2334 | /* Temporarily set point to the end position, and then evaluate | |
2335 | the form. This makes `(eolp)' work as FORM. */ | |
2336 | CHARPOS (pt) = PT; | |
2337 | BYTEPOS (pt) = PT_BYTE; | |
2338 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2339 | form = eval_form (form); | |
2340 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
2341 | UNGCPRO; | |
2342 | } | |
2343 | ||
2344 | if (NILP (form)) | |
2345 | return 0; | |
2346 | ||
2347 | if (CONSP (prop) | |
2348 | && EQ (XCAR (prop), Qheight) | |
2349 | && CONSP (XCDR (prop))) | |
2350 | { | |
2351 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2352 | return 0; | |
2353 | ||
2354 | /* `(height HEIGHT)'. */ | |
2355 | it->font_height = XCAR (XCDR (prop)); | |
2356 | if (!NILP (it->font_height)) | |
2357 | { | |
2358 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2359 | int new_height = -1; | |
2360 | ||
2361 | if (CONSP (it->font_height) | |
2362 | && (EQ (XCAR (it->font_height), Qplus) | |
2363 | || EQ (XCAR (it->font_height), Qminus)) | |
2364 | && CONSP (XCDR (it->font_height)) | |
2365 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2366 | { | |
2367 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2368 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2369 | if (EQ (XCAR (it->font_height), Qplus)) | |
2370 | steps = - steps; | |
2371 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2372 | } | |
2373 | else if (SYMBOLP (it->font_height)) | |
2374 | { | |
2375 | /* Call function with current height as argument. | |
2376 | Value is the new height. */ | |
2377 | Lisp_Object form, height; | |
2378 | struct gcpro gcpro1; | |
2379 | ||
2380 | height = face->lface[LFACE_HEIGHT_INDEX]; | |
2381 | form = Fcons (it->font_height, Fcons (height, Qnil)); | |
2382 | GCPRO1 (form); | |
2383 | height = eval_form (form); | |
2384 | if (NUMBERP (height)) | |
2385 | new_height = XFLOATINT (height); | |
2386 | UNGCPRO; | |
2387 | } | |
2388 | else if (NUMBERP (it->font_height)) | |
2389 | { | |
2390 | /* Value is a multiple of the canonical char height. */ | |
2391 | struct face *face; | |
2392 | ||
2393 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2394 | new_height = (XFLOATINT (it->font_height) | |
2395 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2396 | } | |
2397 | else | |
2398 | { | |
2399 | /* Evaluate IT->font_height with `height' bound to the | |
2400 | current specified height to get the new height. */ | |
2401 | Lisp_Object value; | |
2402 | int count = specpdl_ptr - specpdl; | |
2403 | ||
2404 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2405 | value = eval_form (it->font_height); | |
2406 | unbind_to (count, Qnil); | |
2407 | ||
2408 | if (NUMBERP (value)) | |
2409 | new_height = XFLOATINT (value); | |
2410 | } | |
2411 | ||
2412 | if (new_height > 0) | |
2413 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2414 | } | |
2415 | } | |
2416 | else if (CONSP (prop) | |
2417 | && EQ (XCAR (prop), Qspace_width) | |
2418 | && CONSP (XCDR (prop))) | |
2419 | { | |
2420 | /* `(space_width WIDTH)'. */ | |
2421 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2422 | return 0; | |
2423 | ||
2424 | value = XCAR (XCDR (prop)); | |
2425 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2426 | it->space_width = value; | |
2427 | } | |
2428 | else if (CONSP (prop) | |
2429 | && EQ (XCAR (prop), Qraise) | |
2430 | && CONSP (XCDR (prop))) | |
2431 | { | |
2432 | #ifdef HAVE_WINDOW_SYSTEM | |
2433 | /* `(raise FACTOR)'. */ | |
2434 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2435 | return 0; | |
2436 | ||
2437 | value = XCAR (XCDR (prop)); | |
2438 | if (NUMBERP (value)) | |
2439 | { | |
2440 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2441 | it->voffset = - (XFLOATINT (value) | |
2442 | * (face->font->ascent + face->font->descent)); | |
2443 | } | |
2444 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2445 | } | |
2446 | else if (!it->string_from_display_prop_p) | |
2447 | { | |
2448 | /* `(left-margin VALUE)' or `(right-margin VALUE) | |
2449 | or `(nil VALUE)' or VALUE. */ | |
2450 | Lisp_Object location, value; | |
2451 | struct text_pos start_pos; | |
2452 | int valid_p; | |
2453 | ||
2454 | /* Characters having this form of property are not displayed, so | |
2455 | we have to find the end of the property. */ | |
2456 | space_or_image_found_p = 1; | |
2457 | start_pos = *position; | |
2458 | *position = display_prop_end (it, object, start_pos); | |
2459 | ||
2460 | /* Let's stop at the new position and assume that all | |
2461 | text properties change there. */ | |
2462 | it->stop_charpos = position->charpos; | |
2463 | ||
2464 | if (CONSP (prop) | |
2465 | && !EQ (XCAR (prop), Qspace) | |
2466 | && !EQ (XCAR (prop), Qimage)) | |
2467 | { | |
2468 | location = XCAR (prop); | |
2469 | value = XCDR (prop); | |
2470 | } | |
2471 | else | |
2472 | { | |
2473 | location = Qnil; | |
2474 | value = prop; | |
2475 | } | |
2476 | ||
2477 | #ifdef HAVE_WINDOW_SYSTEM | |
2478 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2479 | valid_p = STRINGP (value); | |
2480 | else | |
2481 | valid_p = (STRINGP (value) | |
2482 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2483 | || valid_image_p (value)); | |
2484 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2485 | valid_p = STRINGP (value); | |
2486 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2487 | ||
2488 | if ((EQ (location, Qleft_margin) | |
2489 | || EQ (location, Qright_margin) | |
2490 | || NILP (location)) | |
2491 | && valid_p) | |
2492 | { | |
2493 | /* Save current settings of IT so that we can restore them | |
2494 | when we are finished with the glyph property value. */ | |
2495 | push_it (it); | |
2496 | ||
2497 | if (NILP (location)) | |
2498 | it->area = TEXT_AREA; | |
2499 | else if (EQ (location, Qleft_margin)) | |
2500 | it->area = LEFT_MARGIN_AREA; | |
2501 | else | |
2502 | it->area = RIGHT_MARGIN_AREA; | |
2503 | ||
2504 | if (STRINGP (value)) | |
2505 | { | |
2506 | it->string = value; | |
2507 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2508 | it->current.overlay_string_index = -1; | |
2509 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2510 | it->end_charpos = it->string_nchars | |
2511 | = XSTRING (it->string)->size; | |
2512 | it->method = next_element_from_string; | |
2513 | it->stop_charpos = 0; | |
2514 | it->string_from_display_prop_p = 1; | |
2515 | } | |
2516 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2517 | { | |
2518 | it->method = next_element_from_stretch; | |
2519 | it->object = value; | |
2520 | it->current.pos = it->position = start_pos; | |
2521 | } | |
2522 | #ifdef HAVE_WINDOW_SYSTEM | |
2523 | else | |
2524 | { | |
2525 | it->what = IT_IMAGE; | |
2526 | it->image_id = lookup_image (it->f, value); | |
2527 | it->position = start_pos; | |
2528 | it->object = NILP (object) ? it->w->buffer : object; | |
2529 | it->method = next_element_from_image; | |
2530 | ||
2531 | /* Say that we don't have consumed the characters with | |
2532 | `display' property yet. The call to pop_it in | |
2533 | set_iterator_to_next will clean this up. */ | |
2534 | *position = start_pos; | |
2535 | } | |
2536 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2537 | } | |
2538 | } | |
2539 | ||
2540 | return space_or_image_found_p; | |
2541 | } | |
2542 | ||
2543 | ||
2544 | \f | |
2545 | /*********************************************************************** | |
2546 | Overlay strings | |
2547 | ***********************************************************************/ | |
2548 | ||
2549 | /* The following structure is used to record overlay strings for | |
2550 | later sorting in load_overlay_strings. */ | |
2551 | ||
2552 | struct overlay_entry | |
2553 | { | |
2554 | Lisp_Object string; | |
2555 | int priority; | |
2556 | int after_string_p; | |
2557 | }; | |
2558 | ||
2559 | ||
2560 | /* Set up iterator IT from overlay strings at its current position. | |
2561 | Called from handle_stop. */ | |
2562 | ||
2563 | static enum prop_handled | |
2564 | handle_overlay_change (it) | |
2565 | struct it *it; | |
2566 | { | |
2567 | /* Overlays are handled in current_buffer only. */ | |
2568 | if (STRINGP (it->string)) | |
2569 | return HANDLED_NORMALLY; | |
2570 | else | |
2571 | return (get_overlay_strings (it) | |
2572 | ? HANDLED_RECOMPUTE_PROPS | |
2573 | : HANDLED_NORMALLY); | |
2574 | } | |
2575 | ||
2576 | ||
2577 | /* Set up the next overlay string for delivery by IT, if there is an | |
2578 | overlay string to deliver. Called by set_iterator_to_next when the | |
2579 | end of the current overlay string is reached. If there are more | |
2580 | overlay strings to display, IT->string and | |
2581 | IT->current.overlay_string_index are set appropriately here. | |
2582 | Otherwise IT->string is set to nil. */ | |
2583 | ||
2584 | static void | |
2585 | next_overlay_string (it) | |
2586 | struct it *it; | |
2587 | { | |
2588 | ++it->current.overlay_string_index; | |
2589 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2590 | { | |
2591 | /* No more overlay strings. Restore IT's settings to what | |
2592 | they were before overlay strings were processed, and | |
2593 | continue to deliver from current_buffer. */ | |
2594 | pop_it (it); | |
2595 | xassert (it->stop_charpos >= BEGV | |
2596 | && it->stop_charpos <= it->end_charpos); | |
2597 | it->string = Qnil; | |
2598 | it->current.overlay_string_index = -1; | |
2599 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2600 | it->n_overlay_strings = 0; | |
2601 | it->method = next_element_from_buffer; | |
2602 | } | |
2603 | else | |
2604 | { | |
2605 | /* There are more overlay strings to process. If | |
2606 | IT->current.overlay_string_index has advanced to a position | |
2607 | where we must load IT->overlay_strings with more strings, do | |
2608 | it. */ | |
2609 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2610 | ||
2611 | if (it->current.overlay_string_index && i == 0) | |
2612 | load_overlay_strings (it); | |
2613 | ||
2614 | /* Initialize IT to deliver display elements from the overlay | |
2615 | string. */ | |
2616 | it->string = it->overlay_strings[i]; | |
2617 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2618 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2619 | it->method = next_element_from_string; | |
2620 | it->stop_charpos = 0; | |
2621 | } | |
2622 | ||
2623 | CHECK_IT (it); | |
2624 | } | |
2625 | ||
2626 | ||
2627 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2628 | comparison function for qsort in load_overlay_strings. Overlay | |
2629 | strings for the same position are sorted so that | |
2630 | ||
2631 | 1. All after-strings come in front of before-strings. | |
2632 | ||
2633 | 2. Within after-strings, strings are sorted so that overlay strings | |
2634 | from overlays with higher priorities come first. | |
2635 | ||
2636 | 2. Within before-strings, strings are sorted so that overlay | |
2637 | strings from overlays with higher priorities come last. | |
2638 | ||
2639 | Value is analogous to strcmp. */ | |
2640 | ||
2641 | ||
2642 | static int | |
2643 | compare_overlay_entries (e1, e2) | |
2644 | void *e1, *e2; | |
2645 | { | |
2646 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2647 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2648 | int result; | |
2649 | ||
2650 | if (entry1->after_string_p != entry2->after_string_p) | |
2651 | /* Let after-strings appear in front of before-strings. */ | |
2652 | result = entry1->after_string_p ? -1 : 1; | |
2653 | else if (entry1->after_string_p) | |
2654 | /* After-strings sorted in order of decreasing priority. */ | |
2655 | result = entry2->priority - entry1->priority; | |
2656 | else | |
2657 | /* Before-strings sorted in order of increasing priority. */ | |
2658 | result = entry1->priority - entry2->priority; | |
2659 | ||
2660 | return result; | |
2661 | } | |
2662 | ||
2663 | ||
2664 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2665 | current buffer position. Set IT->n_overlays to the total number of | |
2666 | overlay strings found. | |
2667 | ||
2668 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2669 | a time. On entry into load_overlay_strings, | |
2670 | IT->current.overlay_string_index gives the number of overlay | |
2671 | strings that have already been loaded by previous calls to this | |
2672 | function. | |
2673 | ||
2674 | Overlay strings are sorted so that after-string strings come in | |
2675 | front of before-string strings. Within before and after-strings, | |
2676 | strings are sorted by overlay priority. See also function | |
2677 | compare_overlay_entries. */ | |
2678 | ||
2679 | static void | |
2680 | load_overlay_strings (it) | |
2681 | struct it *it; | |
2682 | { | |
2683 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2684 | Lisp_Object ov, overlay, window, str; | |
2685 | int start, end; | |
2686 | int size = 20; | |
2687 | int n = 0, i, j; | |
2688 | struct overlay_entry *entries | |
2689 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2690 | ||
2691 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2692 | `entries' which has size `size' and currently contains `n' | |
2693 | elements. AFTER_P non-zero means STRING is an after-string of | |
2694 | OVERLAY. */ | |
2695 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2696 | do \ | |
2697 | { \ | |
2698 | Lisp_Object priority; \ | |
2699 | \ | |
2700 | if (n == size) \ | |
2701 | { \ | |
2702 | int new_size = 2 * size; \ | |
2703 | struct overlay_entry *old = entries; \ | |
2704 | entries = \ | |
2705 | (struct overlay_entry *) alloca (new_size \ | |
2706 | * sizeof *entries); \ | |
2707 | bcopy (old, entries, size * sizeof *entries); \ | |
2708 | size = new_size; \ | |
2709 | } \ | |
2710 | \ | |
2711 | entries[n].string = (STRING); \ | |
2712 | priority = Foverlay_get ((OVERLAY), Qpriority); \ | |
2713 | entries[n].priority \ | |
2714 | = INTEGERP (priority) ? XFASTINT (priority) : 0; \ | |
2715 | entries[n].after_string_p = (AFTER_P); \ | |
2716 | ++n; \ | |
2717 | } \ | |
2718 | while (0) | |
2719 | ||
2720 | /* Process overlay before the overlay center. */ | |
2721 | for (ov = current_buffer->overlays_before; | |
2722 | CONSP (ov); | |
2723 | ov = XCONS (ov)->cdr) | |
2724 | { | |
2725 | overlay = XCONS (ov)->car; | |
2726 | xassert (OVERLAYP (overlay)); | |
2727 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2728 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2729 | ||
2730 | if (end < IT_CHARPOS (*it)) | |
2731 | break; | |
2732 | ||
2733 | /* Skip this overlay if it doesn't start or end at IT's current | |
2734 | position. */ | |
2735 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2736 | continue; | |
2737 | ||
2738 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2739 | window = Foverlay_get (overlay, Qwindow); | |
2740 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2741 | continue; | |
2742 | ||
2743 | /* If overlay has a non-empty before-string, record it. */ | |
2744 | if (start == IT_CHARPOS (*it) | |
2745 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2746 | && XSTRING (str)->size) | |
2747 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2748 | ||
2749 | /* If overlay has a non-empty after-string, record it. */ | |
2750 | if (end == IT_CHARPOS (*it) | |
2751 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2752 | && XSTRING (str)->size) | |
2753 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2754 | } | |
2755 | ||
2756 | /* Process overlays after the overlay center. */ | |
2757 | for (ov = current_buffer->overlays_after; | |
2758 | CONSP (ov); | |
2759 | ov = XCONS (ov)->cdr) | |
2760 | { | |
2761 | overlay = XCONS (ov)->car; | |
2762 | xassert (OVERLAYP (overlay)); | |
2763 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2764 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2765 | ||
2766 | if (start > IT_CHARPOS (*it)) | |
2767 | break; | |
2768 | ||
2769 | /* Skip this overlay if it doesn't start or end at IT's current | |
2770 | position. */ | |
2771 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2772 | continue; | |
2773 | ||
2774 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2775 | window = Foverlay_get (overlay, Qwindow); | |
2776 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2777 | continue; | |
2778 | ||
2779 | /* If overlay has a non-empty before-string, record it. */ | |
2780 | if (start == IT_CHARPOS (*it) | |
2781 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2782 | && XSTRING (str)->size) | |
2783 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2784 | ||
2785 | /* If overlay has a non-empty after-string, record it. */ | |
2786 | if (end == IT_CHARPOS (*it) | |
2787 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2788 | && XSTRING (str)->size) | |
2789 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2790 | } | |
2791 | ||
2792 | #undef RECORD_OVERLAY_STRING | |
2793 | ||
2794 | /* Sort entries. */ | |
2795 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
2796 | ||
2797 | /* Record the total number of strings to process. */ | |
2798 | it->n_overlay_strings = n; | |
2799 | ||
2800 | /* IT->current.overlay_string_index is the number of overlay strings | |
2801 | that have already been consumed by IT. Copy some of the | |
2802 | remaining overlay strings to IT->overlay_strings. */ | |
2803 | i = 0; | |
2804 | j = it->current.overlay_string_index; | |
2805 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
2806 | it->overlay_strings[i++] = entries[j++].string; | |
2807 | ||
2808 | CHECK_IT (it); | |
2809 | } | |
2810 | ||
2811 | ||
2812 | /* Get the first chunk of overlay strings at IT's current buffer | |
2813 | position. Value is non-zero if at least one overlay string was | |
2814 | found. */ | |
2815 | ||
2816 | static int | |
2817 | get_overlay_strings (it) | |
2818 | struct it *it; | |
2819 | { | |
2820 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
2821 | process. This fills IT->overlay_strings with strings, and sets | |
2822 | IT->n_overlay_strings to the total number of strings to process. | |
2823 | IT->pos.overlay_string_index has to be set temporarily to zero | |
2824 | because load_overlay_strings needs this; it must be set to -1 | |
2825 | when no overlay strings are found because a zero value would | |
2826 | indicate a position in the first overlay string. */ | |
2827 | it->current.overlay_string_index = 0; | |
2828 | load_overlay_strings (it); | |
2829 | ||
2830 | /* If we found overlay strings, set up IT to deliver display | |
2831 | elements from the first one. Otherwise set up IT to deliver | |
2832 | from current_buffer. */ | |
2833 | if (it->n_overlay_strings) | |
2834 | { | |
2835 | /* Make sure we know settings in current_buffer, so that we can | |
2836 | restore meaningful values when we're done with the overlay | |
2837 | strings. */ | |
2838 | compute_stop_pos (it); | |
2839 | xassert (it->face_id >= 0); | |
2840 | ||
2841 | /* Save IT's settings. They are restored after all overlay | |
2842 | strings have been processed. */ | |
2843 | xassert (it->sp == 0); | |
2844 | push_it (it); | |
2845 | ||
2846 | /* Set up IT to deliver display elements from the first overlay | |
2847 | string. */ | |
2848 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2849 | it->stop_charpos = 0; | |
2850 | it->string = it->overlay_strings[0]; | |
2851 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2852 | xassert (STRINGP (it->string)); | |
2853 | it->method = next_element_from_string; | |
2854 | } | |
2855 | else | |
2856 | { | |
2857 | it->string = Qnil; | |
2858 | it->current.overlay_string_index = -1; | |
2859 | it->method = next_element_from_buffer; | |
2860 | } | |
2861 | ||
2862 | CHECK_IT (it); | |
2863 | ||
2864 | /* Value is non-zero if we found at least one overlay string. */ | |
2865 | return STRINGP (it->string); | |
2866 | } | |
2867 | ||
2868 | ||
2869 | \f | |
2870 | /*********************************************************************** | |
2871 | Saving and restoring state | |
2872 | ***********************************************************************/ | |
2873 | ||
2874 | /* Save current settings of IT on IT->stack. Called, for example, | |
2875 | before setting up IT for an overlay string, to be able to restore | |
2876 | IT's settings to what they were after the overlay string has been | |
2877 | processed. */ | |
2878 | ||
2879 | static void | |
2880 | push_it (it) | |
2881 | struct it *it; | |
2882 | { | |
2883 | struct iterator_stack_entry *p; | |
2884 | ||
2885 | xassert (it->sp < 2); | |
2886 | p = it->stack + it->sp; | |
2887 | ||
2888 | p->stop_charpos = it->stop_charpos; | |
2889 | xassert (it->face_id >= 0); | |
2890 | p->face_id = it->face_id; | |
2891 | p->string = it->string; | |
2892 | p->pos = it->current; | |
2893 | p->end_charpos = it->end_charpos; | |
2894 | p->string_nchars = it->string_nchars; | |
2895 | p->area = it->area; | |
2896 | p->multibyte_p = it->multibyte_p; | |
2897 | p->space_width = it->space_width; | |
2898 | p->font_height = it->font_height; | |
2899 | p->voffset = it->voffset; | |
2900 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
2901 | ++it->sp; | |
2902 | } | |
2903 | ||
2904 | ||
2905 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
2906 | more overlay strings must be processed, and we return to delivering | |
2907 | display elements from a buffer, or when the end of a string from a | |
2908 | `display' property is reached and we return to delivering display | |
2909 | elements from an overlay string, or from a buffer. */ | |
2910 | ||
2911 | static void | |
2912 | pop_it (it) | |
2913 | struct it *it; | |
2914 | { | |
2915 | struct iterator_stack_entry *p; | |
2916 | ||
2917 | xassert (it->sp > 0); | |
2918 | --it->sp; | |
2919 | p = it->stack + it->sp; | |
2920 | it->stop_charpos = p->stop_charpos; | |
2921 | it->face_id = p->face_id; | |
2922 | it->string = p->string; | |
2923 | it->current = p->pos; | |
2924 | it->end_charpos = p->end_charpos; | |
2925 | it->string_nchars = p->string_nchars; | |
2926 | it->area = p->area; | |
2927 | it->multibyte_p = p->multibyte_p; | |
2928 | it->space_width = p->space_width; | |
2929 | it->font_height = p->font_height; | |
2930 | it->voffset = p->voffset; | |
2931 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
2932 | } | |
2933 | ||
2934 | ||
2935 | \f | |
2936 | /*********************************************************************** | |
2937 | Moving over lines | |
2938 | ***********************************************************************/ | |
2939 | ||
2940 | /* Set IT's current position to the previous line start. */ | |
2941 | ||
2942 | static void | |
2943 | back_to_previous_line_start (it) | |
2944 | struct it *it; | |
2945 | { | |
2946 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
2947 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2948 | } | |
2949 | ||
2950 | ||
2951 | /* Set IT's current position to the next line start. */ | |
2952 | ||
2953 | static void | |
2954 | forward_to_next_line_start (it) | |
2955 | struct it *it; | |
2956 | { | |
2957 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
2958 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2959 | } | |
2960 | ||
2961 | ||
2962 | /* Set IT's current position to the previous visible line start. Skip | |
2963 | invisible text that is so either due to text properties or due to | |
2964 | selective display. Caution: this does not change IT->current_x and | |
2965 | IT->hpos. */ | |
2966 | ||
2967 | static void | |
2968 | back_to_previous_visible_line_start (it) | |
2969 | struct it *it; | |
2970 | { | |
2971 | int visible_p = 0; | |
2972 | ||
2973 | /* Go back one newline if not on BEGV already. */ | |
2974 | if (IT_CHARPOS (*it) > BEGV) | |
2975 | back_to_previous_line_start (it); | |
2976 | ||
2977 | /* Move over lines that are invisible because of selective display | |
2978 | or text properties. */ | |
2979 | while (IT_CHARPOS (*it) > BEGV | |
2980 | && !visible_p) | |
2981 | { | |
2982 | visible_p = 1; | |
2983 | ||
2984 | /* If selective > 0, then lines indented more than that values | |
2985 | are invisible. */ | |
2986 | if (it->selective > 0 | |
2987 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
2988 | it->selective)) | |
2989 | visible_p = 0; | |
2990 | #ifdef USE_TEXT_PROPERTIES | |
2991 | else | |
2992 | { | |
2993 | Lisp_Object prop; | |
2994 | ||
2995 | prop = Fget_char_property (IT_CHARPOS (*it), Qinvisible, it->window); | |
2996 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2997 | visible_p = 0; | |
2998 | } | |
2999 | #endif /* USE_TEXT_PROPERTIES */ | |
3000 | ||
3001 | /* Back one more newline if the current one is invisible. */ | |
3002 | if (!visible_p) | |
3003 | back_to_previous_line_start (it); | |
3004 | } | |
3005 | ||
3006 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3007 | xassert (IT_CHARPOS (*it) == BEGV | |
3008 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3009 | CHECK_IT (it); | |
3010 | } | |
3011 | ||
3012 | ||
3013 | /* Reseat iterator IT at the previous visible line start. Skip | |
3014 | invisible text that is so either due to text properties or due to | |
3015 | selective display. At the end, update IT's overlay information, | |
3016 | face information etc. */ | |
3017 | ||
3018 | static void | |
3019 | reseat_at_previous_visible_line_start (it) | |
3020 | struct it *it; | |
3021 | { | |
3022 | back_to_previous_visible_line_start (it); | |
3023 | reseat (it, it->current.pos, 1); | |
3024 | CHECK_IT (it); | |
3025 | } | |
3026 | ||
3027 | ||
3028 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3029 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3030 | preceding the line start. Skip over invisible text that is so | |
3031 | because of selective display. Compute faces, overlays etc at the | |
3032 | new position. Note that this function does not skip over text that | |
3033 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3034 | |
3035 | static void | |
312246d1 | 3036 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3037 | struct it *it; |
312246d1 | 3038 | int on_newline_p; |
5f5c8ee5 GM |
3039 | { |
3040 | /* Restore the buffer position when currently not delivering display | |
3041 | elements from the current buffer. This is the case, for example, | |
3042 | when called at the end of a truncated overlay string. */ | |
3043 | while (it->sp) | |
3044 | pop_it (it); | |
3045 | it->method = next_element_from_buffer; | |
3046 | ||
3047 | /* Otherwise, scan_buffer would not work. */ | |
3048 | if (IT_CHARPOS (*it) < ZV) | |
3049 | { | |
3050 | /* If on a newline, advance past it. Otherwise, find the next | |
3051 | newline which automatically gives us the position following | |
3052 | the newline. */ | |
3053 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3054 | { | |
3055 | ++IT_CHARPOS (*it); | |
3056 | ++IT_BYTEPOS (*it); | |
3057 | } | |
3058 | else | |
3059 | forward_to_next_line_start (it); | |
3060 | ||
3061 | /* We must either have reached the end of the buffer or end up | |
3062 | after a newline. */ | |
3063 | xassert (IT_CHARPOS (*it) == ZV | |
3064 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3065 | ||
3066 | /* Skip over lines that are invisible because they are indented | |
3067 | more than the value of IT->selective. */ | |
3068 | if (it->selective > 0) | |
3069 | while (IT_CHARPOS (*it) < ZV | |
3070 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3071 | it->selective)) | |
3072 | forward_to_next_line_start (it); | |
312246d1 GM |
3073 | |
3074 | /* Position on the newline if we should. */ | |
3075 | if (on_newline_p && IT_CHARPOS (*it) > BEGV) | |
3076 | { | |
3077 | --IT_CHARPOS (*it); | |
3078 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3079 | } | |
5f5c8ee5 GM |
3080 | |
3081 | /* Set the iterator there. The 0 as the last parameter of | |
3082 | reseat means don't force a text property lookup. The lookup | |
3083 | is then only done if we've skipped past the iterator's | |
3084 | check_charpos'es. This optimization is important because | |
3085 | text property lookups tend to be expensive. */ | |
3086 | reseat (it, it->current.pos, 0); | |
3087 | } | |
3088 | ||
3089 | CHECK_IT (it); | |
3090 | } | |
3091 | ||
3092 | ||
3093 | \f | |
3094 | /*********************************************************************** | |
3095 | Changing an iterator's position | |
3096 | ***********************************************************************/ | |
3097 | ||
3098 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3099 | is non-zero, always check for text properties at the new position. | |
3100 | Otherwise, text properties are only looked up if POS >= | |
3101 | IT->check_charpos of a property. */ | |
3102 | ||
3103 | static void | |
3104 | reseat (it, pos, force_p) | |
3105 | struct it *it; | |
3106 | struct text_pos pos; | |
3107 | int force_p; | |
3108 | { | |
3109 | int original_pos = IT_CHARPOS (*it); | |
3110 | ||
3111 | reseat_1 (it, pos, 0); | |
3112 | ||
3113 | /* Determine where to check text properties. Avoid doing it | |
3114 | where possible because text property lookup is very expensive. */ | |
3115 | if (force_p | |
3116 | || CHARPOS (pos) > it->stop_charpos | |
3117 | || CHARPOS (pos) < original_pos) | |
3118 | handle_stop (it); | |
3119 | ||
3120 | CHECK_IT (it); | |
3121 | } | |
3122 | ||
3123 | ||
3124 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3125 | IT->stop_pos to POS, also. */ | |
3126 | ||
3127 | static void | |
3128 | reseat_1 (it, pos, set_stop_p) | |
3129 | struct it *it; | |
3130 | struct text_pos pos; | |
3131 | int set_stop_p; | |
3132 | { | |
3133 | /* Don't call this function when scanning a C string. */ | |
3134 | xassert (it->s == NULL); | |
3135 | ||
3136 | /* POS must be a reasonable value. */ | |
3137 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3138 | ||
3139 | it->current.pos = it->position = pos; | |
3140 | XSETBUFFER (it->object, current_buffer); | |
3141 | it->dpvec = NULL; | |
3142 | it->current.dpvec_index = -1; | |
3143 | it->current.overlay_string_index = -1; | |
3144 | IT_STRING_CHARPOS (*it) = -1; | |
3145 | IT_STRING_BYTEPOS (*it) = -1; | |
3146 | it->string = Qnil; | |
3147 | it->method = next_element_from_buffer; | |
3148 | it->sp = 0; | |
3149 | ||
3150 | if (set_stop_p) | |
3151 | it->stop_charpos = CHARPOS (pos); | |
3152 | } | |
3153 | ||
3154 | ||
3155 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3156 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3157 | STRING gives a Lisp string to iterate over. | |
3158 | ||
3159 | If PRECISION > 0, don't return more then PRECISION number of | |
3160 | characters from the string. | |
3161 | ||
3162 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3163 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3164 | field width. | |
3165 | ||
3166 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3167 | MULTIBYTE > 0 means enable it, | |
3168 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3169 | ||
3170 | IT must be initialized via a prior call to init_iterator before | |
3171 | calling this function. */ | |
3172 | ||
3173 | static void | |
3174 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3175 | struct it *it; | |
3176 | unsigned char *s; | |
3177 | Lisp_Object string; | |
3178 | int charpos; | |
3179 | int precision, field_width, multibyte; | |
3180 | { | |
3181 | /* No region in strings. */ | |
3182 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3183 | ||
3184 | /* No text property checks performed by default, but see below. */ | |
3185 | it->stop_charpos = -1; | |
3186 | ||
3187 | /* Set iterator position and end position. */ | |
3188 | bzero (&it->current, sizeof it->current); | |
3189 | it->current.overlay_string_index = -1; | |
3190 | it->current.dpvec_index = -1; | |
3191 | it->charset = CHARSET_ASCII; | |
3192 | xassert (charpos >= 0); | |
3193 | ||
3194 | /* Use the setting of MULTIBYTE if specified. */ | |
3195 | if (multibyte >= 0) | |
3196 | it->multibyte_p = multibyte > 0; | |
3197 | ||
3198 | if (s == NULL) | |
3199 | { | |
3200 | xassert (STRINGP (string)); | |
3201 | it->string = string; | |
3202 | it->s = NULL; | |
3203 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3204 | it->method = next_element_from_string; | |
3205 | it->current.string_pos = string_pos (charpos, string); | |
3206 | } | |
3207 | else | |
3208 | { | |
3209 | it->s = s; | |
3210 | it->string = Qnil; | |
3211 | ||
3212 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3213 | for displaying C strings. */ | |
3214 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3215 | if (it->multibyte_p) | |
3216 | { | |
3217 | it->current.pos = c_string_pos (charpos, s, 1); | |
3218 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3219 | } | |
3220 | else | |
3221 | { | |
3222 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3223 | it->end_charpos = it->string_nchars = strlen (s); | |
3224 | } | |
3225 | ||
3226 | it->method = next_element_from_c_string; | |
3227 | } | |
3228 | ||
3229 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3230 | from the string. */ | |
3231 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3232 | it->end_charpos = it->string_nchars = charpos + precision; | |
3233 | ||
3234 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3235 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3236 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3237 | padding with `-' at the end of a mode line. */ | |
3238 | if (field_width < 0) | |
3239 | field_width = INFINITY; | |
3240 | if (field_width > it->end_charpos - charpos) | |
3241 | it->end_charpos = charpos + field_width; | |
3242 | ||
3243 | /* Use the standard display table for displaying strings. */ | |
3244 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3245 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3246 | ||
3247 | it->stop_charpos = charpos; | |
3248 | CHECK_IT (it); | |
3249 | } | |
3250 | ||
3251 | ||
3252 | \f | |
3253 | /*********************************************************************** | |
3254 | Iteration | |
3255 | ***********************************************************************/ | |
3256 | ||
3257 | /* Load IT's display element fields with information about the next | |
3258 | display element from the current position of IT. Value is zero if | |
3259 | end of buffer (or C string) is reached. */ | |
3260 | ||
3261 | int | |
3262 | get_next_display_element (it) | |
3263 | struct it *it; | |
3264 | { | |
3265 | /* Non-zero means that we found an display element. Zero means that | |
3266 | we hit the end of what we iterate over. Performance note: the | |
3267 | function pointer `method' used here turns out to be faster than | |
3268 | using a sequence of if-statements. */ | |
3269 | int success_p = (*it->method) (it); | |
3270 | int charset; | |
3271 | ||
3272 | if (it->what == IT_CHARACTER) | |
3273 | { | |
3274 | /* Map via display table or translate control characters. | |
3275 | IT->c, IT->len etc. have been set to the next character by | |
3276 | the function call above. If we have a display table, and it | |
3277 | contains an entry for IT->c, translate it. Don't do this if | |
3278 | IT->c itself comes from a display table, otherwise we could | |
3279 | end up in an infinite recursion. (An alternative could be to | |
3280 | count the recursion depth of this function and signal an | |
3281 | error when a certain maximum depth is reached.) Is it worth | |
3282 | it? */ | |
3283 | if (success_p && it->dpvec == NULL) | |
3284 | { | |
3285 | Lisp_Object dv; | |
3286 | ||
3287 | if (it->dp | |
3288 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3289 | VECTORP (dv))) | |
3290 | { | |
3291 | struct Lisp_Vector *v = XVECTOR (dv); | |
3292 | ||
3293 | /* Return the first character from the display table | |
3294 | entry, if not empty. If empty, don't display the | |
3295 | current character. */ | |
3296 | if (v->size) | |
3297 | { | |
3298 | it->dpvec_char_len = it->len; | |
3299 | it->dpvec = v->contents; | |
3300 | it->dpend = v->contents + v->size; | |
3301 | it->current.dpvec_index = 0; | |
3302 | it->method = next_element_from_display_vector; | |
3303 | } | |
3304 | ||
3305 | success_p = get_next_display_element (it); | |
3306 | } | |
3307 | ||
3308 | /* Translate control characters into `\003' or `^C' form. | |
3309 | Control characters coming from a display table entry are | |
3310 | currently not translated because we use IT->dpvec to hold | |
3311 | the translation. This could easily be changed but I | |
3312 | don't believe that it is worth doing. */ | |
3313 | else if ((it->c < ' ' | |
3314 | && (it->area != TEXT_AREA | |
c6e89d6c | 3315 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 3316 | || (it->c >= 127 |
5f5c8ee5 GM |
3317 | && it->len == 1)) |
3318 | { | |
3319 | /* IT->c is a control character which must be displayed | |
3320 | either as '\003' or as `^C' where the '\\' and '^' | |
3321 | can be defined in the display table. Fill | |
3322 | IT->ctl_chars with glyphs for what we have to | |
3323 | display. Then, set IT->dpvec to these glyphs. */ | |
3324 | GLYPH g; | |
3325 | ||
54c85a23 | 3326 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3327 | { |
3328 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3329 | if (it->dp | |
3330 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3331 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3332 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3333 | else | |
3334 | g = FAST_MAKE_GLYPH ('^', 0); | |
3335 | XSETINT (it->ctl_chars[0], g); | |
3336 | ||
3337 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3338 | XSETINT (it->ctl_chars[1], g); | |
3339 | ||
3340 | /* Set up IT->dpvec and return first character from it. */ | |
3341 | it->dpvec_char_len = it->len; | |
3342 | it->dpvec = it->ctl_chars; | |
3343 | it->dpend = it->dpvec + 2; | |
3344 | it->current.dpvec_index = 0; | |
3345 | it->method = next_element_from_display_vector; | |
3346 | get_next_display_element (it); | |
3347 | } | |
3348 | else | |
3349 | { | |
3350 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ | |
3351 | if (it->dp | |
3352 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3353 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
3354 | g = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); | |
3355 | else | |
3356 | g = FAST_MAKE_GLYPH ('\\', 0); | |
3357 | XSETINT (it->ctl_chars[0], g); | |
3358 | ||
3359 | /* Insert three more glyphs into IT->ctl_chars for | |
3360 | the octal display of the character. */ | |
3361 | g = FAST_MAKE_GLYPH (((it->c >> 6) & 7) + '0', 0); | |
3362 | XSETINT (it->ctl_chars[1], g); | |
3363 | g = FAST_MAKE_GLYPH (((it->c >> 3) & 7) + '0', 0); | |
3364 | XSETINT (it->ctl_chars[2], g); | |
3365 | g = FAST_MAKE_GLYPH ((it->c & 7) + '0', 0); | |
3366 | XSETINT (it->ctl_chars[3], g); | |
3367 | ||
3368 | /* Set up IT->dpvec and return the first character | |
3369 | from it. */ | |
3370 | it->dpvec_char_len = it->len; | |
3371 | it->dpvec = it->ctl_chars; | |
3372 | it->dpend = it->dpvec + 4; | |
3373 | it->current.dpvec_index = 0; | |
3374 | it->method = next_element_from_display_vector; | |
3375 | get_next_display_element (it); | |
3376 | } | |
3377 | } | |
3378 | } | |
3379 | ||
3380 | /* Adjust face id if charset changes. There are no charset | |
3381 | changes in unibyte text because Emacs' charsets are not | |
3382 | applicable there. */ | |
3383 | if (it->multibyte_p | |
3384 | && success_p | |
3385 | && (charset = CHAR_CHARSET (it->c), | |
3386 | charset != it->charset)) | |
3387 | { | |
3388 | it->charset = charset; | |
3389 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, charset); | |
3390 | } | |
3391 | } | |
3392 | ||
3393 | /* Is this character the last one of a run of characters with | |
3394 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3395 | if (it->face_box_p | |
3396 | && it->s == NULL) | |
3397 | { | |
3398 | int face_id; | |
3399 | struct face *face; | |
3400 | ||
3401 | it->end_of_box_run_p | |
3402 | = ((face_id = face_after_it_pos (it), | |
3403 | face_id != it->face_id) | |
3404 | && (face = FACE_FROM_ID (it->f, face_id), | |
3405 | face->box == FACE_NO_BOX)); | |
3406 | } | |
3407 | ||
3408 | /* Value is 0 if end of buffer or string reached. */ | |
3409 | return success_p; | |
3410 | } | |
3411 | ||
3412 | ||
3413 | /* Move IT to the next display element. | |
3414 | ||
3415 | Functions get_next_display_element and set_iterator_to_next are | |
3416 | separate because I find this arrangement easier to handle than a | |
3417 | get_next_display_element function that also increments IT's | |
3418 | position. The way it is we can first look at an iterator's current | |
3419 | display element, decide whether it fits on a line, and if it does, | |
3420 | increment the iterator position. The other way around we probably | |
3421 | would either need a flag indicating whether the iterator has to be | |
3422 | incremented the next time, or we would have to implement a | |
3423 | decrement position function which would not be easy to write. */ | |
3424 | ||
3425 | void | |
3426 | set_iterator_to_next (it) | |
3427 | struct it *it; | |
3428 | { | |
3429 | if (it->method == next_element_from_buffer) | |
3430 | { | |
3431 | /* The current display element of IT is a character from | |
3432 | current_buffer. Advance in the buffer, and maybe skip over | |
3433 | invisible lines that are so because of selective display. */ | |
3434 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3435 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3436 | else |
3437 | { | |
3438 | xassert (it->len != 0); | |
3439 | IT_BYTEPOS (*it) += it->len; | |
3440 | IT_CHARPOS (*it) += 1; | |
3441 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3442 | } | |
3443 | } | |
3444 | else if (it->method == next_element_from_c_string) | |
3445 | { | |
3446 | /* Current display element of IT is from a C string. */ | |
3447 | IT_BYTEPOS (*it) += it->len; | |
3448 | IT_CHARPOS (*it) += 1; | |
3449 | } | |
3450 | else if (it->method == next_element_from_display_vector) | |
3451 | { | |
3452 | /* Current display element of IT is from a display table entry. | |
3453 | Advance in the display table definition. Reset it to null if | |
3454 | end reached, and continue with characters from buffers/ | |
3455 | strings. */ | |
3456 | ++it->current.dpvec_index; | |
286bcbc9 GM |
3457 | |
3458 | /* Restore face and charset of the iterator to what they were | |
3459 | before the display vector entry (these entries may contain | |
3460 | faces, and of course characters of different charsets). */ | |
5f5c8ee5 | 3461 | it->face_id = it->saved_face_id; |
286bcbc9 GM |
3462 | it->charset = FACE_FROM_ID (it->f, it->face_id)->charset; |
3463 | ||
5f5c8ee5 GM |
3464 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3465 | { | |
3466 | if (it->s) | |
3467 | it->method = next_element_from_c_string; | |
3468 | else if (STRINGP (it->string)) | |
3469 | it->method = next_element_from_string; | |
3470 | else | |
3471 | it->method = next_element_from_buffer; | |
3472 | ||
3473 | it->dpvec = NULL; | |
3474 | it->current.dpvec_index = -1; | |
3475 | ||
312246d1 GM |
3476 | /* Skip over characters which were displayed via IT->dpvec. */ |
3477 | if (it->dpvec_char_len < 0) | |
3478 | reseat_at_next_visible_line_start (it, 1); | |
3479 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3480 | { |
3481 | it->len = it->dpvec_char_len; | |
3482 | set_iterator_to_next (it); | |
3483 | } | |
3484 | } | |
3485 | } | |
3486 | else if (it->method == next_element_from_string) | |
3487 | { | |
3488 | /* Current display element is a character from a Lisp string. */ | |
3489 | xassert (it->s == NULL && STRINGP (it->string)); | |
3490 | IT_STRING_BYTEPOS (*it) += it->len; | |
3491 | IT_STRING_CHARPOS (*it) += 1; | |
3492 | ||
3493 | consider_string_end: | |
3494 | ||
3495 | if (it->current.overlay_string_index >= 0) | |
3496 | { | |
3497 | /* IT->string is an overlay string. Advance to the | |
3498 | next, if there is one. */ | |
3499 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3500 | next_overlay_string (it); | |
3501 | } | |
3502 | else | |
3503 | { | |
3504 | /* IT->string is not an overlay string. If we reached | |
3505 | its end, and there is something on IT->stack, proceed | |
3506 | with what is on the stack. This can be either another | |
3507 | string, this time an overlay string, or a buffer. */ | |
3508 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3509 | && it->sp > 0) | |
3510 | { | |
3511 | pop_it (it); | |
3512 | if (!STRINGP (it->string)) | |
3513 | it->method = next_element_from_buffer; | |
3514 | } | |
3515 | } | |
3516 | } | |
3517 | else if (it->method == next_element_from_image | |
3518 | || it->method == next_element_from_stretch) | |
3519 | { | |
3520 | /* The position etc with which we have to proceed are on | |
3521 | the stack. The position may be at the end of a string, | |
3522 | if the `display' property takes up the whole string. */ | |
3523 | pop_it (it); | |
3524 | it->image_id = 0; | |
3525 | if (STRINGP (it->string)) | |
3526 | { | |
3527 | it->method = next_element_from_string; | |
3528 | goto consider_string_end; | |
3529 | } | |
3530 | else | |
3531 | it->method = next_element_from_buffer; | |
3532 | } | |
3533 | else | |
3534 | /* There are no other methods defined, so this should be a bug. */ | |
3535 | abort (); | |
3536 | ||
3537 | /* Reset flags indicating start and end of a sequence of | |
3538 | characters with box. */ | |
3539 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3540 | ||
3541 | xassert (it->method != next_element_from_string | |
3542 | || (STRINGP (it->string) | |
3543 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3544 | } | |
3545 | ||
3546 | ||
3547 | /* Load IT's display element fields with information about the next | |
3548 | display element which comes from a display table entry or from the | |
3549 | result of translating a control character to one of the forms `^C' | |
3550 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3551 | ||
3552 | static int | |
3553 | next_element_from_display_vector (it) | |
3554 | struct it *it; | |
3555 | { | |
3556 | /* Precondition. */ | |
3557 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3558 | ||
3559 | /* Remember the current face id in case glyphs specify faces. | |
3560 | IT's face is restored in set_iterator_to_next. */ | |
3561 | it->saved_face_id = it->face_id; | |
3562 | ||
3563 | if (INTEGERP (*it->dpvec) | |
3564 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3565 | { | |
3566 | int lface_id; | |
3567 | GLYPH g; | |
3568 | ||
3569 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3570 | it->c = FAST_GLYPH_CHAR (g); | |
3571 | it->len = CHAR_LEN (it->c); | |
3572 | ||
3573 | /* The entry may contain a face id to use. Such a face id is | |
3574 | the id of a Lisp face, not a realized face. A face id of | |
3575 | zero means no face. */ | |
3576 | lface_id = FAST_GLYPH_FACE (g); | |
3577 | if (lface_id) | |
3578 | { | |
3579 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); | |
3580 | if (face_id >= 0) | |
3581 | { | |
3582 | it->face_id = face_id; | |
3583 | it->charset = CHARSET_ASCII; | |
3584 | } | |
3585 | } | |
3586 | } | |
3587 | else | |
3588 | /* Display table entry is invalid. Return a space. */ | |
3589 | it->c = ' ', it->len = 1; | |
3590 | ||
3591 | /* Don't change position and object of the iterator here. They are | |
3592 | still the values of the character that had this display table | |
3593 | entry or was translated, and that's what we want. */ | |
3594 | it->what = IT_CHARACTER; | |
3595 | return 1; | |
3596 | } | |
3597 | ||
3598 | ||
3599 | /* Load IT with the next display element from Lisp string IT->string. | |
3600 | IT->current.string_pos is the current position within the string. | |
3601 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3602 | overlay string. */ | |
3603 | ||
3604 | static int | |
3605 | next_element_from_string (it) | |
3606 | struct it *it; | |
3607 | { | |
3608 | struct text_pos position; | |
3609 | ||
3610 | xassert (STRINGP (it->string)); | |
3611 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3612 | position = it->current.string_pos; | |
3613 | ||
3614 | /* Time to check for invisible text? */ | |
3615 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3616 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3617 | { | |
3618 | handle_stop (it); | |
3619 | ||
3620 | /* Since a handler may have changed IT->method, we must | |
3621 | recurse here. */ | |
3622 | return get_next_display_element (it); | |
3623 | } | |
3624 | ||
3625 | if (it->current.overlay_string_index >= 0) | |
3626 | { | |
3627 | /* Get the next character from an overlay string. In overlay | |
3628 | strings, There is no field width or padding with spaces to | |
3629 | do. */ | |
3630 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3631 | { | |
3632 | it->what = IT_EOB; | |
3633 | return 0; | |
3634 | } | |
3635 | else if (STRING_MULTIBYTE (it->string)) | |
3636 | { | |
3637 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3638 | - IT_STRING_BYTEPOS (*it)); | |
3639 | unsigned char *s = (XSTRING (it->string)->data | |
3640 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3641 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3642 | } |
3643 | else | |
3644 | { | |
3645 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3646 | it->len = 1; | |
3647 | } | |
3648 | } | |
3649 | else | |
3650 | { | |
3651 | /* Get the next character from a Lisp string that is not an | |
3652 | overlay string. Such strings come from the mode line, for | |
3653 | example. We may have to pad with spaces, or truncate the | |
3654 | string. See also next_element_from_c_string. */ | |
3655 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3656 | { | |
3657 | it->what = IT_EOB; | |
3658 | return 0; | |
3659 | } | |
3660 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3661 | { | |
3662 | /* Pad with spaces. */ | |
3663 | it->c = ' ', it->len = 1; | |
3664 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3665 | } | |
3666 | else if (STRING_MULTIBYTE (it->string)) | |
3667 | { | |
3668 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3669 | - IT_STRING_BYTEPOS (*it)); | |
3670 | unsigned char *s = (XSTRING (it->string)->data | |
3671 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3672 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3673 | } |
3674 | else | |
3675 | { | |
3676 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3677 | it->len = 1; | |
3678 | } | |
3679 | } | |
3680 | ||
3681 | /* Record what we have and where it came from. Note that we store a | |
3682 | buffer position in IT->position although it could arguably be a | |
3683 | string position. */ | |
3684 | it->what = IT_CHARACTER; | |
3685 | it->object = it->string; | |
3686 | it->position = position; | |
3687 | return 1; | |
3688 | } | |
3689 | ||
3690 | ||
3691 | /* Load IT with next display element from C string IT->s. | |
3692 | IT->string_nchars is the maximum number of characters to return | |
3693 | from the string. IT->end_charpos may be greater than | |
3694 | IT->string_nchars when this function is called, in which case we | |
3695 | may have to return padding spaces. Value is zero if end of string | |
3696 | reached, including padding spaces. */ | |
3697 | ||
3698 | static int | |
3699 | next_element_from_c_string (it) | |
3700 | struct it *it; | |
3701 | { | |
3702 | int success_p = 1; | |
3703 | ||
3704 | xassert (it->s); | |
3705 | it->what = IT_CHARACTER; | |
3706 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
3707 | it->object = Qnil; | |
3708 | ||
3709 | /* IT's position can be greater IT->string_nchars in case a field | |
3710 | width or precision has been specified when the iterator was | |
3711 | initialized. */ | |
3712 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3713 | { | |
3714 | /* End of the game. */ | |
3715 | it->what = IT_EOB; | |
3716 | success_p = 0; | |
3717 | } | |
3718 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
3719 | { | |
3720 | /* Pad with spaces. */ | |
3721 | it->c = ' ', it->len = 1; | |
3722 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
3723 | } | |
3724 | else if (it->multibyte_p) | |
3725 | { | |
3726 | /* Implementation note: The calls to strlen apparently aren't a | |
3727 | performance problem because there is no noticeable performance | |
3728 | difference between Emacs running in unibyte or multibyte mode. */ | |
3729 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
3730 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
3731 | maxlen, &it->len); | |
5f5c8ee5 GM |
3732 | } |
3733 | else | |
3734 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
3735 | ||
3736 | return success_p; | |
3737 | } | |
3738 | ||
3739 | ||
3740 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
3741 | The definition of the ellipsis glyphs may come from a display table | |
3742 | entry. This function Fills IT with the first glyph from the | |
3743 | ellipsis if an ellipsis is to be displayed. */ | |
3744 | ||
3745 | static void | |
3746 | next_element_from_ellipsis (it) | |
3747 | struct it *it; | |
3748 | { | |
3749 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
3750 | { | |
3751 | /* Use the display table definition for `...'. Invalid glyphs | |
3752 | will be handled by the method returning elements from dpvec. */ | |
3753 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3754 | it->dpvec_char_len = it->len; | |
3755 | it->dpvec = v->contents; | |
3756 | it->dpend = v->contents + v->size; | |
3757 | it->current.dpvec_index = 0; | |
3758 | it->method = next_element_from_display_vector; | |
3759 | get_next_display_element (it); | |
3760 | } | |
3761 | else if (it->selective_display_ellipsis_p) | |
3762 | { | |
3763 | /* Use default `...' which is stored in default_invis_vector. */ | |
3764 | it->dpvec_char_len = it->len; | |
3765 | it->dpvec = default_invis_vector; | |
3766 | it->dpend = default_invis_vector + 3; | |
3767 | it->current.dpvec_index = 0; | |
3768 | it->method = next_element_from_display_vector; | |
3769 | get_next_display_element (it); | |
3770 | } | |
3771 | } | |
3772 | ||
3773 | ||
3774 | /* Deliver an image display element. The iterator IT is already | |
3775 | filled with image information (done in handle_display_prop). Value | |
3776 | is always 1. */ | |
3777 | ||
3778 | ||
3779 | static int | |
3780 | next_element_from_image (it) | |
3781 | struct it *it; | |
3782 | { | |
3783 | it->what = IT_IMAGE; | |
3784 | return 1; | |
3785 | } | |
3786 | ||
3787 | ||
3788 | /* Fill iterator IT with next display element from a stretch glyph | |
3789 | property. IT->object is the value of the text property. Value is | |
3790 | always 1. */ | |
3791 | ||
3792 | static int | |
3793 | next_element_from_stretch (it) | |
3794 | struct it *it; | |
3795 | { | |
3796 | it->what = IT_STRETCH; | |
3797 | return 1; | |
3798 | } | |
3799 | ||
3800 | ||
3801 | /* Load IT with the next display element from current_buffer. Value | |
3802 | is zero if end of buffer reached. IT->stop_charpos is the next | |
3803 | position at which to stop and check for text properties or buffer | |
3804 | end. */ | |
3805 | ||
3806 | static int | |
3807 | next_element_from_buffer (it) | |
3808 | struct it *it; | |
3809 | { | |
3810 | int success_p = 1; | |
3811 | ||
3812 | /* Check this assumption, otherwise, we would never enter the | |
3813 | if-statement, below. */ | |
3814 | xassert (IT_CHARPOS (*it) >= BEGV | |
3815 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
3816 | ||
3817 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
3818 | { | |
3819 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3820 | { | |
3821 | int overlay_strings_follow_p; | |
3822 | ||
3823 | /* End of the game, except when overlay strings follow that | |
3824 | haven't been returned yet. */ | |
3825 | if (it->overlay_strings_at_end_processed_p) | |
3826 | overlay_strings_follow_p = 0; | |
3827 | else | |
3828 | { | |
3829 | it->overlay_strings_at_end_processed_p = 1; | |
3830 | overlay_strings_follow_p | |
3831 | = get_overlay_strings (it); | |
3832 | } | |
3833 | ||
3834 | if (overlay_strings_follow_p) | |
3835 | success_p = get_next_display_element (it); | |
3836 | else | |
3837 | { | |
3838 | it->what = IT_EOB; | |
3839 | it->position = it->current.pos; | |
3840 | success_p = 0; | |
3841 | } | |
3842 | } | |
3843 | else | |
3844 | { | |
3845 | handle_stop (it); | |
3846 | return get_next_display_element (it); | |
3847 | } | |
3848 | } | |
3849 | else | |
3850 | { | |
3851 | /* No face changes, overlays etc. in sight, so just return a | |
3852 | character from current_buffer. */ | |
3853 | unsigned char *p; | |
3854 | ||
3855 | /* Maybe run the redisplay end trigger hook. Performance note: | |
3856 | This doesn't seem to cost measurable time. */ | |
3857 | if (it->redisplay_end_trigger_charpos | |
3858 | && it->glyph_row | |
3859 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
3860 | run_redisplay_end_trigger_hook (it); | |
3861 | ||
3862 | /* Get the next character, maybe multibyte. */ | |
3863 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
3864 | if (it->multibyte_p) | |
3865 | { | |
3866 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
3867 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 3868 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
3869 | } |
3870 | else | |
3871 | it->c = *p, it->len = 1; | |
3872 | ||
3873 | /* Record what we have and where it came from. */ | |
3874 | it->what = IT_CHARACTER;; | |
3875 | it->object = it->w->buffer; | |
3876 | it->position = it->current.pos; | |
3877 | ||
3878 | /* Normally we return the character found above, except when we | |
3879 | really want to return an ellipsis for selective display. */ | |
3880 | if (it->selective) | |
3881 | { | |
3882 | if (it->c == '\n') | |
3883 | { | |
3884 | /* A value of selective > 0 means hide lines indented more | |
3885 | than that number of columns. */ | |
3886 | if (it->selective > 0 | |
3887 | && IT_CHARPOS (*it) + 1 < ZV | |
3888 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
3889 | IT_BYTEPOS (*it) + 1, | |
3890 | it->selective)) | |
312246d1 GM |
3891 | { |
3892 | next_element_from_ellipsis (it); | |
3893 | it->dpvec_char_len = -1; | |
3894 | } | |
5f5c8ee5 GM |
3895 | } |
3896 | else if (it->c == '\r' && it->selective == -1) | |
3897 | { | |
3898 | /* A value of selective == -1 means that everything from the | |
3899 | CR to the end of the line is invisible, with maybe an | |
3900 | ellipsis displayed for it. */ | |
3901 | next_element_from_ellipsis (it); | |
312246d1 | 3902 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
3903 | } |
3904 | } | |
3905 | } | |
3906 | ||
3907 | /* Value is zero if end of buffer reached. */ | |
3908 | xassert (!success_p || it->len > 0); | |
3909 | return success_p; | |
3910 | } | |
3911 | ||
3912 | ||
3913 | /* Run the redisplay end trigger hook for IT. */ | |
3914 | ||
3915 | static void | |
3916 | run_redisplay_end_trigger_hook (it) | |
3917 | struct it *it; | |
3918 | { | |
3919 | Lisp_Object args[3]; | |
3920 | ||
3921 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
3922 | displaying something, or otherwise we should not run the hook. */ | |
3923 | xassert (it->glyph_row); | |
3924 | ||
3925 | /* Set up hook arguments. */ | |
3926 | args[0] = Qredisplay_end_trigger_functions; | |
3927 | args[1] = it->window; | |
3928 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
3929 | it->redisplay_end_trigger_charpos = 0; | |
3930 | ||
3931 | /* Since we are *trying* to run these functions, don't try to run | |
3932 | them again, even if they get an error. */ | |
3933 | it->w->redisplay_end_trigger = Qnil; | |
3934 | Frun_hook_with_args (3, args); | |
3935 | ||
3936 | /* Notice if it changed the face of the character we are on. */ | |
3937 | handle_face_prop (it); | |
3938 | } | |
3939 | ||
3940 | ||
3941 | \f | |
3942 | /*********************************************************************** | |
3943 | Moving an iterator without producing glyphs | |
3944 | ***********************************************************************/ | |
3945 | ||
3946 | /* Move iterator IT to a specified buffer or X position within one | |
3947 | line on the display without producing glyphs. | |
3948 | ||
3949 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
3950 | whichever is reached first. | |
3951 | ||
3952 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
3953 | ||
3954 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
3955 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
3956 | TO_X includes the amount by which a window is horizontally | |
3957 | scrolled. | |
3958 | ||
3959 | Value is | |
3960 | ||
3961 | MOVE_POS_MATCH_OR_ZV | |
3962 | - when TO_POS or ZV was reached. | |
3963 | ||
3964 | MOVE_X_REACHED | |
3965 | -when TO_X was reached before TO_POS or ZV were reached. | |
3966 | ||
3967 | MOVE_LINE_CONTINUED | |
3968 | - when we reached the end of the display area and the line must | |
3969 | be continued. | |
3970 | ||
3971 | MOVE_LINE_TRUNCATED | |
3972 | - when we reached the end of the display area and the line is | |
3973 | truncated. | |
3974 | ||
3975 | MOVE_NEWLINE_OR_CR | |
3976 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
3977 | display is on. */ | |
3978 | ||
3979 | enum move_it_result | |
3980 | move_it_in_display_line_to (it, to_charpos, to_x, op) | |
3981 | struct it *it; | |
3982 | int to_charpos, to_x, op; | |
3983 | { | |
3984 | enum move_it_result result = MOVE_UNDEFINED; | |
3985 | struct glyph_row *saved_glyph_row; | |
3986 | ||
3987 | /* Don't produce glyphs in produce_glyphs. */ | |
3988 | saved_glyph_row = it->glyph_row; | |
3989 | it->glyph_row = NULL; | |
3990 | ||
5f5c8ee5 GM |
3991 | while (1) |
3992 | { | |
3993 | int x, i; | |
3994 | ||
3995 | /* Stop when ZV or TO_CHARPOS reached. */ | |
3996 | if (!get_next_display_element (it) | |
3997 | || ((op & MOVE_TO_POS) != 0 | |
3998 | && BUFFERP (it->object) | |
3999 | && IT_CHARPOS (*it) >= to_charpos)) | |
4000 | { | |
4001 | result = MOVE_POS_MATCH_OR_ZV; | |
4002 | break; | |
4003 | } | |
4004 | ||
4005 | /* The call to produce_glyphs will get the metrics of the | |
4006 | display element IT is loaded with. We record in x the | |
4007 | x-position before this display element in case it does not | |
4008 | fit on the line. */ | |
4009 | x = it->current_x; | |
4010 | PRODUCE_GLYPHS (it); | |
4011 | ||
4012 | if (it->area != TEXT_AREA) | |
4013 | { | |
4014 | set_iterator_to_next (it); | |
4015 | continue; | |
4016 | } | |
4017 | ||
4018 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4019 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4020 | character on a terminal frame, or (iii) a line end. For the | |
4021 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4022 | (on X frames, there is only one glyph produced for a | |
4023 | composite character. | |
4024 | ||
4025 | The behavior implemented below means, for continuation lines, | |
4026 | that as many spaces of a TAB as fit on the current line are | |
4027 | displayed there. For terminal frames, as many glyphs of a | |
4028 | multi-glyph character are displayed in the current line, too. | |
4029 | This is what the old redisplay code did, and we keep it that | |
4030 | way. Under X, the whole shape of a complex character must | |
4031 | fit on the line or it will be completely displayed in the | |
4032 | next line. | |
4033 | ||
4034 | Note that both for tabs and padding glyphs, all glyphs have | |
4035 | the same width. */ | |
4036 | if (it->nglyphs) | |
4037 | { | |
4038 | /* More than one glyph or glyph doesn't fit on line. All | |
4039 | glyphs have the same width. */ | |
4040 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4041 | int new_x; | |
4042 | ||
4043 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4044 | { | |
4045 | new_x = x + single_glyph_width; | |
4046 | ||
4047 | /* We want to leave anything reaching TO_X to the caller. */ | |
4048 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4049 | { | |
4050 | it->current_x = x; | |
4051 | result = MOVE_X_REACHED; | |
4052 | break; | |
4053 | } | |
4054 | else if (/* Lines are continued. */ | |
4055 | !it->truncate_lines_p | |
4056 | && (/* And glyph doesn't fit on the line. */ | |
4057 | new_x > it->last_visible_x | |
4058 | /* Or it fits exactly and we're on a window | |
4059 | system frame. */ | |
4060 | || (new_x == it->last_visible_x | |
4061 | && FRAME_WINDOW_P (it->f)))) | |
4062 | { | |
4063 | if (/* IT->hpos == 0 means the very first glyph | |
4064 | doesn't fit on the line, e.g. a wide image. */ | |
4065 | it->hpos == 0 | |
4066 | || (new_x == it->last_visible_x | |
4067 | && FRAME_WINDOW_P (it->f))) | |
4068 | { | |
4069 | ++it->hpos; | |
4070 | it->current_x = new_x; | |
4071 | if (i == it->nglyphs - 1) | |
4072 | set_iterator_to_next (it); | |
4073 | } | |
4074 | else | |
4075 | it->current_x = x; | |
4076 | ||
4077 | result = MOVE_LINE_CONTINUED; | |
4078 | break; | |
4079 | } | |
4080 | else if (new_x > it->first_visible_x) | |
4081 | { | |
4082 | /* Glyph is visible. Increment number of glyphs that | |
4083 | would be displayed. */ | |
4084 | ++it->hpos; | |
4085 | } | |
4086 | else | |
4087 | { | |
4088 | /* Glyph is completely off the left margin of the display | |
4089 | area. Nothing to do. */ | |
4090 | } | |
4091 | } | |
4092 | ||
4093 | if (result != MOVE_UNDEFINED) | |
4094 | break; | |
4095 | } | |
4096 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4097 | { | |
4098 | /* Stop when TO_X specified and reached. This check is | |
4099 | necessary here because of lines consisting of a line end, | |
4100 | only. The line end will not produce any glyphs and we | |
4101 | would never get MOVE_X_REACHED. */ | |
4102 | xassert (it->nglyphs == 0); | |
4103 | result = MOVE_X_REACHED; | |
4104 | break; | |
4105 | } | |
4106 | ||
4107 | /* Is this a line end? If yes, we're done. */ | |
4108 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4109 | { | |
4110 | result = MOVE_NEWLINE_OR_CR; | |
4111 | break; | |
4112 | } | |
4113 | ||
4114 | /* The current display element has been consumed. Advance | |
4115 | to the next. */ | |
4116 | set_iterator_to_next (it); | |
4117 | ||
4118 | /* Stop if lines are truncated and IT's current x-position is | |
4119 | past the right edge of the window now. */ | |
4120 | if (it->truncate_lines_p | |
4121 | && it->current_x >= it->last_visible_x) | |
4122 | { | |
4123 | result = MOVE_LINE_TRUNCATED; | |
4124 | break; | |
4125 | } | |
4126 | } | |
4127 | ||
4128 | /* Restore the iterator settings altered at the beginning of this | |
4129 | function. */ | |
4130 | it->glyph_row = saved_glyph_row; | |
4131 | return result; | |
4132 | } | |
4133 | ||
4134 | ||
4135 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4136 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4137 | the description of enum move_operation_enum. | |
4138 | ||
4139 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4140 | screen line, this function will set IT to the next position > | |
4141 | TO_CHARPOS. */ | |
4142 | ||
4143 | void | |
4144 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4145 | struct it *it; | |
4146 | int to_charpos, to_x, to_y, to_vpos; | |
4147 | int op; | |
4148 | { | |
4149 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4150 | int line_height; | |
4151 | ||
5f5c8ee5 GM |
4152 | while (1) |
4153 | { | |
4154 | if (op & MOVE_TO_VPOS) | |
4155 | { | |
4156 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4157 | start of the line TO_VPOS. */ | |
4158 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4159 | { | |
4160 | if (it->vpos == to_vpos) | |
4161 | break; | |
4162 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
4163 | } | |
4164 | else | |
4165 | { | |
4166 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4167 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
4168 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); | |
4169 | ||
4170 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
4171 | break; | |
4172 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) | |
4173 | { | |
4174 | /* We have reached TO_X but not in the line we want. */ | |
4175 | skip = move_it_in_display_line_to (it, to_charpos, | |
4176 | -1, MOVE_TO_POS); | |
4177 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4178 | break; | |
4179 | } | |
4180 | } | |
4181 | } | |
4182 | else if (op & MOVE_TO_Y) | |
4183 | { | |
4184 | struct it it_backup; | |
4185 | int done_p; | |
4186 | ||
4187 | /* TO_Y specified means stop at TO_X in the line containing | |
4188 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4189 | problem is that we can't really tell whether the line | |
4190 | contains TO_Y before we have completely scanned it, and | |
4191 | this may skip past TO_X. What we do is to first scan to | |
4192 | TO_X. | |
4193 | ||
4194 | If TO_X is not specified, use a TO_X of zero. The reason | |
4195 | is to make the outcome of this function more predictable. | |
4196 | If we didn't use TO_X == 0, we would stop at the end of | |
4197 | the line which is probably not what a caller would expect | |
4198 | to happen. */ | |
4199 | skip = move_it_in_display_line_to (it, to_charpos, | |
4200 | ((op & MOVE_TO_X) | |
4201 | ? to_x : 0), | |
4202 | (MOVE_TO_X | |
4203 | | (op & MOVE_TO_POS))); | |
4204 | ||
4205 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4206 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4207 | break; | |
4208 | ||
4209 | /* If TO_X was reached, we would like to know whether TO_Y | |
4210 | is in the line. This can only be said if we know the | |
4211 | total line height which requires us to scan the rest of | |
4212 | the line. */ | |
4213 | done_p = 0; | |
4214 | if (skip == MOVE_X_REACHED) | |
4215 | { | |
4216 | it_backup = *it; | |
4217 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, | |
4218 | op & MOVE_TO_POS); | |
4219 | } | |
4220 | ||
4221 | /* Now, decide whether TO_Y is in this line. */ | |
4222 | line_height = it->max_ascent + it->max_descent; | |
4223 | ||
4224 | if (to_y >= it->current_y | |
4225 | && to_y < it->current_y + line_height) | |
4226 | { | |
4227 | if (skip == MOVE_X_REACHED) | |
4228 | /* If TO_Y is in this line and TO_X was reached above, | |
4229 | we scanned too far. We have to restore IT's settings | |
4230 | to the ones before skipping. */ | |
4231 | *it = it_backup; | |
4232 | done_p = 1; | |
4233 | } | |
4234 | else if (skip == MOVE_X_REACHED) | |
4235 | { | |
4236 | skip = skip2; | |
4237 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4238 | done_p = 1; | |
4239 | } | |
4240 | ||
4241 | if (done_p) | |
4242 | break; | |
4243 | } | |
4244 | else | |
4245 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4246 | ||
4247 | switch (skip) | |
4248 | { | |
4249 | case MOVE_POS_MATCH_OR_ZV: | |
4250 | return; | |
4251 | ||
4252 | case MOVE_NEWLINE_OR_CR: | |
4253 | set_iterator_to_next (it); | |
4254 | it->continuation_lines_width = 0; | |
4255 | break; | |
4256 | ||
4257 | case MOVE_LINE_TRUNCATED: | |
4258 | it->continuation_lines_width = 0; | |
312246d1 | 4259 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4260 | if ((op & MOVE_TO_POS) != 0 |
4261 | && IT_CHARPOS (*it) > to_charpos) | |
4262 | goto out; | |
4263 | break; | |
4264 | ||
4265 | case MOVE_LINE_CONTINUED: | |
4266 | it->continuation_lines_width += it->current_x; | |
4267 | break; | |
4268 | ||
4269 | default: | |
4270 | abort (); | |
4271 | } | |
4272 | ||
4273 | /* Reset/increment for the next run. */ | |
4274 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4275 | it->current_x = it->hpos = 0; | |
4276 | it->current_y += it->max_ascent + it->max_descent; | |
4277 | ++it->vpos; | |
4278 | last_height = it->max_ascent + it->max_descent; | |
4279 | last_max_ascent = it->max_ascent; | |
4280 | it->max_ascent = it->max_descent = 0; | |
4281 | } | |
4282 | out:; | |
4283 | } | |
4284 | ||
4285 | ||
4286 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4287 | ||
4288 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4289 | means move IT backward to the preceding line start or BEGV. This | |
4290 | function may move over more than DY pixels if IT->current_y - DY | |
4291 | ends up in the middle of a line; in this case IT->current_y will be | |
4292 | set to the top of the line moved to. */ | |
4293 | ||
4294 | void | |
4295 | move_it_vertically_backward (it, dy) | |
4296 | struct it *it; | |
4297 | int dy; | |
4298 | { | |
4299 | int nlines, h, line_height; | |
4300 | struct it it2; | |
4301 | int start_pos = IT_CHARPOS (*it); | |
4302 | ||
4303 | xassert (dy >= 0); | |
4304 | ||
4305 | /* Estimate how many newlines we must move back. */ | |
4306 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4307 | ||
4308 | /* Set the iterator's position that many lines back. */ | |
4309 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4310 | back_to_previous_visible_line_start (it); | |
4311 | ||
4312 | /* Reseat the iterator here. When moving backward, we don't want | |
4313 | reseat to skip forward over invisible text, set up the iterator | |
4314 | to deliver from overlay strings at the new position etc. So, | |
4315 | use reseat_1 here. */ | |
4316 | reseat_1 (it, it->current.pos, 1); | |
4317 | ||
4318 | /* We are now surely at a line start. */ | |
4319 | it->current_x = it->hpos = 0; | |
4320 | ||
4321 | /* Move forward and see what y-distance we moved. First move to the | |
4322 | start of the next line so that we get its height. We need this | |
4323 | height to be able to tell whether we reached the specified | |
4324 | y-distance. */ | |
4325 | it2 = *it; | |
4326 | it2.max_ascent = it2.max_descent = 0; | |
4327 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4328 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4329 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4330 | line_height = it2.max_ascent + it2.max_descent; | |
4331 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); | |
4332 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4333 | h = it2.current_y - it->current_y; | |
4334 | nlines = it2.vpos - it->vpos; | |
4335 | ||
4336 | /* Correct IT's y and vpos position. */ | |
4337 | it->vpos -= nlines; | |
4338 | it->current_y -= h; | |
4339 | ||
4340 | if (dy == 0) | |
4341 | { | |
4342 | /* DY == 0 means move to the start of the screen line. The | |
4343 | value of nlines is > 0 if continuation lines were involved. */ | |
4344 | if (nlines > 0) | |
4345 | move_it_by_lines (it, nlines, 1); | |
4346 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4347 | } | |
4348 | else if (nlines) | |
4349 | { | |
4350 | /* The y-position we try to reach. Note that h has been | |
4351 | subtracted in front of the if-statement. */ | |
4352 | int target_y = it->current_y + h - dy; | |
4353 | ||
4354 | /* If we did not reach target_y, try to move further backward if | |
4355 | we can. If we moved too far backward, try to move forward. */ | |
4356 | if (target_y < it->current_y | |
4357 | && IT_CHARPOS (*it) > BEGV) | |
4358 | { | |
4359 | move_it_vertically (it, target_y - it->current_y); | |
4360 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4361 | } | |
4362 | else if (target_y >= it->current_y + line_height | |
4363 | && IT_CHARPOS (*it) < ZV) | |
4364 | { | |
4365 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4366 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4367 | } | |
4368 | } | |
4369 | } | |
4370 | ||
4371 | ||
4372 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4373 | move backwards. DY = 0 means move to start of screen line. At the | |
4374 | end, IT will be on the start of a screen line. */ | |
4375 | ||
4376 | void | |
4377 | move_it_vertically (it, dy) | |
4378 | struct it *it; | |
4379 | int dy; | |
4380 | { | |
4381 | if (dy <= 0) | |
4382 | move_it_vertically_backward (it, -dy); | |
4383 | else if (dy > 0) | |
4384 | { | |
4385 | move_it_to (it, ZV, -1, it->current_y + dy, -1, | |
4386 | MOVE_TO_POS | MOVE_TO_Y); | |
4387 | ||
4388 | /* If buffer ends in ZV without a newline, move to the start of | |
4389 | the line to satisfy the post-condition. */ | |
4390 | if (IT_CHARPOS (*it) == ZV | |
4391 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4392 | move_it_by_lines (it, 0, 0); | |
4393 | } | |
4394 | } | |
4395 | ||
4396 | ||
4397 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4398 | and END_CHARPOS is invisible. IT->window is the window for text | |
4399 | property lookup. */ | |
4400 | ||
4401 | static int | |
4402 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4403 | struct it *it; | |
4404 | int start_charpos, end_charpos; | |
4405 | { | |
4406 | #ifdef USE_TEXT_PROPERTIES | |
4407 | Lisp_Object prop, limit; | |
4408 | int invisible_found_p; | |
4409 | ||
4410 | xassert (it != NULL && start_charpos <= end_charpos); | |
4411 | ||
4412 | /* Is text at START invisible? */ | |
4413 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4414 | it->window); | |
4415 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4416 | invisible_found_p = 1; | |
4417 | else | |
4418 | { | |
4419 | limit = Fnext_single_property_change (make_number (start_charpos), | |
4420 | Qinvisible, | |
4421 | Fcurrent_buffer (), | |
4422 | make_number (end_charpos)); | |
4423 | invisible_found_p = XFASTINT (limit) < end_charpos; | |
4424 | } | |
4425 | ||
4426 | return invisible_found_p; | |
4427 | ||
4428 | #else /* not USE_TEXT_PROPERTIES */ | |
4429 | return 0; | |
4430 | #endif /* not USE_TEXT_PROPERTIES */ | |
4431 | } | |
4432 | ||
4433 | ||
4434 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4435 | negative means move up. DVPOS == 0 means move to the start of the | |
4436 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4437 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4438 | ||
4439 | Further optimization ideas: If we would know that IT->f doesn't use | |
4440 | a face with proportional font, we could be faster for | |
4441 | truncate-lines nil. */ | |
4442 | ||
4443 | void | |
4444 | move_it_by_lines (it, dvpos, need_y_p) | |
4445 | struct it *it; | |
4446 | int dvpos, need_y_p; | |
4447 | { | |
4448 | struct position pos; | |
4449 | ||
4450 | if (!FRAME_WINDOW_P (it->f)) | |
4451 | { | |
4452 | struct text_pos textpos; | |
4453 | ||
4454 | /* We can use vmotion on frames without proportional fonts. */ | |
4455 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4456 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4457 | reseat (it, textpos, 1); | |
4458 | it->vpos += pos.vpos; | |
4459 | it->current_y += pos.vpos; | |
4460 | } | |
4461 | else if (dvpos == 0) | |
4462 | { | |
4463 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4464 | move_it_vertically_backward (it, 0); | |
4465 | xassert (it->current_x == 0 && it->hpos == 0); | |
4466 | } | |
4467 | else if (dvpos > 0) | |
4468 | { | |
4469 | /* If there are no continuation lines, and if there is no | |
4470 | selective display, try the simple method of moving forward | |
4471 | DVPOS newlines, then see where we are. */ | |
4472 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4473 | { | |
4474 | int shortage = 0, charpos; | |
4475 | ||
4476 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4477 | charpos = IT_CHARPOS (*it) + 1; | |
4478 | else | |
4479 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4480 | &shortage, 0); | |
4481 | ||
4482 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4483 | { | |
4484 | struct text_pos pos; | |
4485 | CHARPOS (pos) = charpos; | |
4486 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4487 | reseat (it, pos, 1); | |
4488 | it->vpos += dvpos - shortage; | |
4489 | it->hpos = it->current_x = 0; | |
4490 | return; | |
4491 | } | |
4492 | } | |
4493 | ||
4494 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4495 | } | |
4496 | else | |
4497 | { | |
4498 | struct it it2; | |
4499 | int start_charpos, i; | |
4500 | ||
4501 | /* If there are no continuation lines, and if there is no | |
4502 | selective display, try the simple method of moving backward | |
4503 | -DVPOS newlines. */ | |
4504 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4505 | { | |
4506 | int shortage; | |
4507 | int charpos = IT_CHARPOS (*it); | |
4508 | int bytepos = IT_BYTEPOS (*it); | |
4509 | ||
4510 | /* If in the middle of a line, go to its start. */ | |
4511 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4512 | { | |
4513 | charpos = find_next_newline_no_quit (charpos, -1); | |
4514 | bytepos = CHAR_TO_BYTE (charpos); | |
4515 | } | |
4516 | ||
4517 | if (charpos == BEGV) | |
4518 | { | |
4519 | struct text_pos pos; | |
4520 | CHARPOS (pos) = charpos; | |
4521 | BYTEPOS (pos) = bytepos; | |
4522 | reseat (it, pos, 1); | |
4523 | it->hpos = it->current_x = 0; | |
4524 | return; | |
4525 | } | |
4526 | else | |
4527 | { | |
4528 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4529 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4530 | { | |
4531 | struct text_pos pos; | |
4532 | CHARPOS (pos) = charpos; | |
4533 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4534 | reseat (it, pos, 1); | |
4535 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4536 | it->hpos = it->current_x = 0; | |
4537 | return; | |
4538 | } | |
4539 | } | |
4540 | } | |
4541 | ||
4542 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4543 | start_charpos = IT_CHARPOS (*it); | |
4544 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4545 | back_to_previous_visible_line_start (it); | |
4546 | reseat (it, it->current.pos, 1); | |
4547 | it->current_x = it->hpos = 0; | |
4548 | ||
4549 | /* Above call may have moved too far if continuation lines | |
4550 | are involved. Scan forward and see if it did. */ | |
4551 | it2 = *it; | |
4552 | it2.vpos = it2.current_y = 0; | |
4553 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4554 | it->vpos -= it2.vpos; | |
4555 | it->current_y -= it2.current_y; | |
4556 | it->current_x = it->hpos = 0; | |
4557 | ||
4558 | /* If we moved too far, move IT some lines forward. */ | |
4559 | if (it2.vpos > -dvpos) | |
4560 | { | |
4561 | int delta = it2.vpos + dvpos; | |
4562 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4563 | } | |
4564 | } | |
4565 | } | |
4566 | ||
4567 | ||
4568 | \f | |
4569 | /*********************************************************************** | |
4570 | Messages | |
4571 | ***********************************************************************/ | |
4572 | ||
4573 | ||
4574 | /* Output a newline in the *Messages* buffer if "needs" one. */ | |
4575 | ||
4576 | void | |
4577 | message_log_maybe_newline () | |
4578 | { | |
4579 | if (message_log_need_newline) | |
4580 | message_dolog ("", 0, 1, 0); | |
4581 | } | |
4582 | ||
4583 | ||
4584 | /* Add a string M of length LEN to the message log, optionally | |
4585 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4586 | nonzero, means interpret the contents of M as multibyte. This | |
4587 | function calls low-level routines in order to bypass text property | |
4588 | hooks, etc. which might not be safe to run. */ | |
4589 | ||
4590 | void | |
4591 | message_dolog (m, len, nlflag, multibyte) | |
4592 | char *m; | |
4593 | int len, nlflag, multibyte; | |
4594 | { | |
4595 | if (!NILP (Vmessage_log_max)) | |
4596 | { | |
4597 | struct buffer *oldbuf; | |
4598 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4599 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4600 | int point_at_end = 0; | |
4601 | int zv_at_end = 0; | |
4602 | Lisp_Object old_deactivate_mark, tem; | |
4603 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4604 | ||
4605 | old_deactivate_mark = Vdeactivate_mark; | |
4606 | oldbuf = current_buffer; | |
4607 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); | |
4608 | current_buffer->undo_list = Qt; | |
4609 | ||
4610 | oldpoint = Fpoint_marker (); | |
4611 | oldbegv = Fpoint_min_marker (); | |
4612 | oldzv = Fpoint_max_marker (); | |
4613 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
4614 | ||
4615 | if (PT == Z) | |
4616 | point_at_end = 1; | |
4617 | if (ZV == Z) | |
4618 | zv_at_end = 1; | |
4619 | ||
4620 | BEGV = BEG; | |
4621 | BEGV_BYTE = BEG_BYTE; | |
4622 | ZV = Z; | |
4623 | ZV_BYTE = Z_BYTE; | |
4624 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4625 | ||
4626 | /* Insert the string--maybe converting multibyte to single byte | |
4627 | or vice versa, so that all the text fits the buffer. */ | |
4628 | if (multibyte | |
4629 | && NILP (current_buffer->enable_multibyte_characters)) | |
4630 | { | |
4631 | int i, c, nbytes; | |
4632 | unsigned char work[1]; | |
4633 | ||
4634 | /* Convert a multibyte string to single-byte | |
4635 | for the *Message* buffer. */ | |
4636 | for (i = 0; i < len; i += nbytes) | |
4637 | { | |
4fdb80f2 | 4638 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
4639 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
4640 | ? c | |
4641 | : multibyte_char_to_unibyte (c, Qnil)); | |
4642 | insert_1_both (work, 1, 1, 1, 0, 0); | |
4643 | } | |
4644 | } | |
4645 | else if (! multibyte | |
4646 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
4647 | { | |
4648 | int i, c, nbytes; | |
4649 | unsigned char *msg = (unsigned char *) m; | |
4650 | unsigned char *str, work[4]; | |
4651 | /* Convert a single-byte string to multibyte | |
4652 | for the *Message* buffer. */ | |
4653 | for (i = 0; i < len; i++) | |
4654 | { | |
4655 | c = unibyte_char_to_multibyte (msg[i]); | |
4656 | nbytes = CHAR_STRING (c, work, str); | |
4657 | insert_1_both (work, 1, nbytes, 1, 0, 0); | |
4658 | } | |
4659 | } | |
4660 | else if (len) | |
4661 | insert_1 (m, len, 1, 0, 0); | |
4662 | ||
4663 | if (nlflag) | |
4664 | { | |
4665 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
4666 | insert_1 ("\n", 1, 1, 0, 0); | |
4667 | ||
4668 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
4669 | this_bol = PT; | |
4670 | this_bol_byte = PT_BYTE; | |
4671 | ||
4672 | if (this_bol > BEG) | |
4673 | { | |
4674 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
4675 | prev_bol = PT; | |
4676 | prev_bol_byte = PT_BYTE; | |
4677 | ||
4678 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
4679 | this_bol, this_bol_byte); | |
4680 | if (dup) | |
4681 | { | |
4682 | del_range_both (prev_bol, prev_bol_byte, | |
4683 | this_bol, this_bol_byte, 0); | |
4684 | if (dup > 1) | |
4685 | { | |
4686 | char dupstr[40]; | |
4687 | int duplen; | |
4688 | ||
4689 | /* If you change this format, don't forget to also | |
4690 | change message_log_check_duplicate. */ | |
4691 | sprintf (dupstr, " [%d times]", dup); | |
4692 | duplen = strlen (dupstr); | |
4693 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
4694 | insert_1 (dupstr, duplen, 1, 0, 1); | |
4695 | } | |
4696 | } | |
4697 | } | |
4698 | ||
4699 | if (NATNUMP (Vmessage_log_max)) | |
4700 | { | |
4701 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
4702 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
4703 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
4704 | } | |
4705 | } | |
4706 | BEGV = XMARKER (oldbegv)->charpos; | |
4707 | BEGV_BYTE = marker_byte_position (oldbegv); | |
4708 | ||
4709 | if (zv_at_end) | |
4710 | { | |
4711 | ZV = Z; | |
4712 | ZV_BYTE = Z_BYTE; | |
4713 | } | |
4714 | else | |
4715 | { | |
4716 | ZV = XMARKER (oldzv)->charpos; | |
4717 | ZV_BYTE = marker_byte_position (oldzv); | |
4718 | } | |
4719 | ||
4720 | if (point_at_end) | |
4721 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4722 | else | |
4723 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
4724 | Lisp code. */ | |
4725 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
4726 | XMARKER (oldpoint)->bytepos); | |
4727 | ||
4728 | UNGCPRO; | |
4729 | free_marker (oldpoint); | |
4730 | free_marker (oldbegv); | |
4731 | free_marker (oldzv); | |
4732 | ||
4733 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
4734 | set_buffer_internal (oldbuf); | |
4735 | if (NILP (tem)) | |
4736 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
4737 | message_log_need_newline = !nlflag; | |
4738 | Vdeactivate_mark = old_deactivate_mark; | |
4739 | } | |
4740 | } | |
4741 | ||
4742 | ||
4743 | /* We are at the end of the buffer after just having inserted a newline. | |
4744 | (Note: We depend on the fact we won't be crossing the gap.) | |
4745 | Check to see if the most recent message looks a lot like the previous one. | |
4746 | Return 0 if different, 1 if the new one should just replace it, or a | |
4747 | value N > 1 if we should also append " [N times]". */ | |
4748 | ||
4749 | static int | |
4750 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
4751 | int prev_bol, this_bol; | |
4752 | int prev_bol_byte, this_bol_byte; | |
4753 | { | |
4754 | int i; | |
4755 | int len = Z_BYTE - 1 - this_bol_byte; | |
4756 | int seen_dots = 0; | |
4757 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
4758 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
4759 | ||
4760 | for (i = 0; i < len; i++) | |
4761 | { | |
4762 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
4763 | && p1[i] != '\n') | |
4764 | seen_dots = 1; | |
4765 | if (p1[i] != p2[i]) | |
4766 | return seen_dots; | |
4767 | } | |
4768 | p1 += len; | |
4769 | if (*p1 == '\n') | |
4770 | return 2; | |
4771 | if (*p1++ == ' ' && *p1++ == '[') | |
4772 | { | |
4773 | int n = 0; | |
4774 | while (*p1 >= '0' && *p1 <= '9') | |
4775 | n = n * 10 + *p1++ - '0'; | |
4776 | if (strncmp (p1, " times]\n", 8) == 0) | |
4777 | return n+1; | |
4778 | } | |
4779 | return 0; | |
4780 | } | |
4781 | ||
4782 | ||
4783 | /* Display an echo area message M with a specified length of LEN | |
4784 | chars. The string may include null characters. If M is 0, clear | |
4785 | out any existing message, and let the mini-buffer text show through. | |
4786 | ||
4787 | The buffer M must continue to exist until after the echo area gets | |
4788 | cleared or some other message gets displayed there. This means do | |
4789 | not pass text that is stored in a Lisp string; do not pass text in | |
4790 | a buffer that was alloca'd. */ | |
4791 | ||
4792 | void | |
4793 | message2 (m, len, multibyte) | |
4794 | char *m; | |
4795 | int len; | |
4796 | int multibyte; | |
4797 | { | |
4798 | /* First flush out any partial line written with print. */ | |
4799 | message_log_maybe_newline (); | |
4800 | if (m) | |
4801 | message_dolog (m, len, 1, multibyte); | |
4802 | message2_nolog (m, len, multibyte); | |
4803 | } | |
4804 | ||
4805 | ||
4806 | /* The non-logging counterpart of message2. */ | |
4807 | ||
4808 | void | |
4809 | message2_nolog (m, len, multibyte) | |
4810 | char *m; | |
4811 | int len; | |
4812 | { | |
4813 | message_enable_multibyte = multibyte; | |
4814 | ||
4815 | if (noninteractive) | |
4816 | { | |
4817 | if (noninteractive_need_newline) | |
4818 | putc ('\n', stderr); | |
4819 | noninteractive_need_newline = 0; | |
4820 | if (m) | |
4821 | fwrite (m, len, 1, stderr); | |
4822 | if (cursor_in_echo_area == 0) | |
4823 | fprintf (stderr, "\n"); | |
4824 | fflush (stderr); | |
4825 | } | |
4826 | /* A null message buffer means that the frame hasn't really been | |
4827 | initialized yet. Error messages get reported properly by | |
4828 | cmd_error, so this must be just an informative message; toss it. */ | |
4829 | else if (INTERACTIVE | |
4830 | && selected_frame->glyphs_initialized_p | |
4831 | && FRAME_MESSAGE_BUF (selected_frame)) | |
4832 | { | |
4833 | Lisp_Object mini_window; | |
4834 | struct frame *f; | |
4835 | ||
4836 | /* Get the frame containing the mini-buffer | |
4837 | that the selected frame is using. */ | |
4838 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
4839 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
4840 | ||
4841 | FRAME_SAMPLE_VISIBILITY (f); | |
4842 | if (FRAME_VISIBLE_P (selected_frame) | |
4843 | && ! FRAME_VISIBLE_P (f)) | |
4844 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4845 | ||
4846 | if (m) | |
4847 | { | |
c6e89d6c | 4848 | set_message (m, Qnil, len, multibyte); |
5f5c8ee5 GM |
4849 | if (minibuffer_auto_raise) |
4850 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4851 | } | |
4852 | else | |
c6e89d6c | 4853 | clear_message (1, 1); |
5f5c8ee5 | 4854 | |
c6e89d6c | 4855 | do_pending_window_change (0); |
5f5c8ee5 | 4856 | echo_area_display (1); |
c6e89d6c | 4857 | do_pending_window_change (0); |
5f5c8ee5 GM |
4858 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
4859 | (*frame_up_to_date_hook) (f); | |
4860 | } | |
4861 | } | |
4862 | ||
4863 | ||
c6e89d6c GM |
4864 | /* Display an echo area message M with a specified length of NBYTES |
4865 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
4866 | string, clear out any existing message, and let the mini-buffer |
4867 | text show through. */ | |
4868 | ||
4869 | void | |
c6e89d6c | 4870 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 4871 | Lisp_Object m; |
c6e89d6c | 4872 | int nbytes; |
5f5c8ee5 GM |
4873 | int multibyte; |
4874 | { | |
4875 | struct gcpro gcpro1; | |
4876 | ||
4877 | GCPRO1 (m); | |
4878 | ||
4879 | /* First flush out any partial line written with print. */ | |
4880 | message_log_maybe_newline (); | |
4881 | if (STRINGP (m)) | |
c6e89d6c GM |
4882 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
4883 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
4884 | |
4885 | UNGCPRO; | |
4886 | } | |
4887 | ||
4888 | ||
4889 | /* The non-logging version of message3. */ | |
4890 | ||
4891 | void | |
c6e89d6c | 4892 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 4893 | Lisp_Object m; |
c6e89d6c | 4894 | int nbytes, multibyte; |
5f5c8ee5 GM |
4895 | { |
4896 | message_enable_multibyte = multibyte; | |
4897 | ||
4898 | if (noninteractive) | |
4899 | { | |
4900 | if (noninteractive_need_newline) | |
4901 | putc ('\n', stderr); | |
4902 | noninteractive_need_newline = 0; | |
4903 | if (STRINGP (m)) | |
c6e89d6c | 4904 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
4905 | if (cursor_in_echo_area == 0) |
4906 | fprintf (stderr, "\n"); | |
4907 | fflush (stderr); | |
4908 | } | |
4909 | /* A null message buffer means that the frame hasn't really been | |
4910 | initialized yet. Error messages get reported properly by | |
4911 | cmd_error, so this must be just an informative message; toss it. */ | |
4912 | else if (INTERACTIVE | |
4913 | && selected_frame->glyphs_initialized_p | |
4914 | && FRAME_MESSAGE_BUF (selected_frame)) | |
4915 | { | |
4916 | Lisp_Object mini_window; | |
c6e89d6c | 4917 | Lisp_Object frame; |
5f5c8ee5 GM |
4918 | struct frame *f; |
4919 | ||
4920 | /* Get the frame containing the mini-buffer | |
4921 | that the selected frame is using. */ | |
4922 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
c6e89d6c GM |
4923 | frame = XWINDOW (mini_window)->frame; |
4924 | f = XFRAME (frame); | |
5f5c8ee5 GM |
4925 | |
4926 | FRAME_SAMPLE_VISIBILITY (f); | |
4927 | if (FRAME_VISIBLE_P (selected_frame) | |
c6e89d6c GM |
4928 | && !FRAME_VISIBLE_P (f)) |
4929 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 4930 | |
c6e89d6c | 4931 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 4932 | { |
c6e89d6c | 4933 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
4934 | if (minibuffer_auto_raise) |
4935 | Fraise_frame (frame); | |
5f5c8ee5 GM |
4936 | } |
4937 | else | |
c6e89d6c | 4938 | clear_message (1, 1); |
5f5c8ee5 | 4939 | |
c6e89d6c | 4940 | do_pending_window_change (0); |
5f5c8ee5 | 4941 | echo_area_display (1); |
c6e89d6c | 4942 | do_pending_window_change (0); |
5f5c8ee5 GM |
4943 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
4944 | (*frame_up_to_date_hook) (f); | |
4945 | } | |
4946 | } | |
4947 | ||
4948 | ||
4949 | /* Display a null-terminated echo area message M. If M is 0, clear | |
4950 | out any existing message, and let the mini-buffer text show through. | |
4951 | ||
4952 | The buffer M must continue to exist until after the echo area gets | |
4953 | cleared or some other message gets displayed there. Do not pass | |
4954 | text that is stored in a Lisp string. Do not pass text in a buffer | |
4955 | that was alloca'd. */ | |
4956 | ||
4957 | void | |
4958 | message1 (m) | |
4959 | char *m; | |
4960 | { | |
4961 | message2 (m, (m ? strlen (m) : 0), 0); | |
4962 | } | |
4963 | ||
4964 | ||
4965 | /* The non-logging counterpart of message1. */ | |
4966 | ||
4967 | void | |
4968 | message1_nolog (m) | |
4969 | char *m; | |
4970 | { | |
4971 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
4972 | } | |
4973 | ||
4974 | /* Display a message M which contains a single %s | |
4975 | which gets replaced with STRING. */ | |
4976 | ||
4977 | void | |
4978 | message_with_string (m, string, log) | |
4979 | char *m; | |
4980 | Lisp_Object string; | |
4981 | int log; | |
4982 | { | |
4983 | if (noninteractive) | |
4984 | { | |
4985 | if (m) | |
4986 | { | |
4987 | if (noninteractive_need_newline) | |
4988 | putc ('\n', stderr); | |
4989 | noninteractive_need_newline = 0; | |
4990 | fprintf (stderr, m, XSTRING (string)->data); | |
4991 | if (cursor_in_echo_area == 0) | |
4992 | fprintf (stderr, "\n"); | |
4993 | fflush (stderr); | |
4994 | } | |
4995 | } | |
4996 | else if (INTERACTIVE) | |
4997 | { | |
4998 | /* The frame whose minibuffer we're going to display the message on. | |
4999 | It may be larger than the selected frame, so we need | |
5000 | to use its buffer, not the selected frame's buffer. */ | |
5001 | Lisp_Object mini_window; | |
5002 | FRAME_PTR f; | |
5003 | ||
5004 | /* Get the frame containing the minibuffer | |
5005 | that the selected frame is using. */ | |
5006 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5007 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
5008 | ||
5009 | /* A null message buffer means that the frame hasn't really been | |
5010 | initialized yet. Error messages get reported properly by | |
5011 | cmd_error, so this must be just an informative message; toss it. */ | |
5012 | if (FRAME_MESSAGE_BUF (f)) | |
5013 | { | |
5014 | int len; | |
5015 | char *a[1]; | |
5016 | a[0] = (char *) XSTRING (string)->data; | |
5017 | ||
5018 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5019 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5020 | ||
5021 | if (log) | |
5022 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5023 | STRING_MULTIBYTE (string)); | |
5024 | else | |
5025 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5026 | STRING_MULTIBYTE (string)); | |
5027 | ||
5028 | /* Print should start at the beginning of the message | |
5029 | buffer next time. */ | |
5030 | message_buf_print = 0; | |
5031 | } | |
5032 | } | |
5033 | } | |
5034 | ||
5035 | ||
5f5c8ee5 GM |
5036 | /* Dump an informative message to the minibuf. If M is 0, clear out |
5037 | any existing message, and let the mini-buffer text show through. */ | |
5038 | ||
5039 | /* VARARGS 1 */ | |
5040 | void | |
5041 | message (m, a1, a2, a3) | |
5042 | char *m; | |
5043 | EMACS_INT a1, a2, a3; | |
5044 | { | |
5045 | if (noninteractive) | |
5046 | { | |
5047 | if (m) | |
5048 | { | |
5049 | if (noninteractive_need_newline) | |
5050 | putc ('\n', stderr); | |
5051 | noninteractive_need_newline = 0; | |
5052 | fprintf (stderr, m, a1, a2, a3); | |
5053 | if (cursor_in_echo_area == 0) | |
5054 | fprintf (stderr, "\n"); | |
5055 | fflush (stderr); | |
5056 | } | |
5057 | } | |
5058 | else if (INTERACTIVE) | |
5059 | { | |
5060 | /* The frame whose mini-buffer we're going to display the message | |
5061 | on. It may be larger than the selected frame, so we need to | |
5062 | use its buffer, not the selected frame's buffer. */ | |
5063 | Lisp_Object mini_window; | |
5064 | struct frame *f; | |
5065 | ||
5066 | /* Get the frame containing the mini-buffer | |
5067 | that the selected frame is using. */ | |
5068 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5069 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
5070 | ||
5071 | /* A null message buffer means that the frame hasn't really been | |
5072 | initialized yet. Error messages get reported properly by | |
5073 | cmd_error, so this must be just an informative message; toss | |
5074 | it. */ | |
5075 | if (FRAME_MESSAGE_BUF (f)) | |
5076 | { | |
5077 | if (m) | |
5078 | { | |
5079 | int len; | |
5080 | #ifdef NO_ARG_ARRAY | |
5081 | char *a[3]; | |
5082 | a[0] = (char *) a1; | |
5083 | a[1] = (char *) a2; | |
5084 | a[2] = (char *) a3; | |
5085 | ||
5086 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5087 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5088 | #else | |
5089 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5090 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5091 | (char **) &a1); | |
5092 | #endif /* NO_ARG_ARRAY */ | |
5093 | ||
5094 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5095 | } | |
5096 | else | |
5097 | message1 (0); | |
5098 | ||
5099 | /* Print should start at the beginning of the message | |
5100 | buffer next time. */ | |
5101 | message_buf_print = 0; | |
5102 | } | |
5103 | } | |
5104 | } | |
5105 | ||
5106 | ||
5107 | /* The non-logging version of message. */ | |
5108 | ||
5109 | void | |
5110 | message_nolog (m, a1, a2, a3) | |
5111 | char *m; | |
5112 | EMACS_INT a1, a2, a3; | |
5113 | { | |
5114 | Lisp_Object old_log_max; | |
5115 | old_log_max = Vmessage_log_max; | |
5116 | Vmessage_log_max = Qnil; | |
5117 | message (m, a1, a2, a3); | |
5118 | Vmessage_log_max = old_log_max; | |
5119 | } | |
5120 | ||
5121 | ||
c6e89d6c GM |
5122 | /* Display the current message in the current mini-buffer. This is |
5123 | only called from error handlers in process.c, and is not time | |
5124 | critical. */ | |
5f5c8ee5 GM |
5125 | |
5126 | void | |
5127 | update_echo_area () | |
5128 | { | |
c6e89d6c GM |
5129 | if (!NILP (echo_area_buffer[0])) |
5130 | { | |
5131 | Lisp_Object string; | |
5132 | string = Fcurrent_message (); | |
5133 | message3 (string, XSTRING (string)->size, | |
5134 | !NILP (current_buffer->enable_multibyte_characters)); | |
5135 | } | |
5136 | } | |
5137 | ||
5138 | ||
5139 | /* Call FN with args A1..A5 with either the current or last displayed | |
5140 | echo_area_buffer as current buffer. | |
5141 | ||
5142 | WHICH zero means use the current message buffer | |
5143 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
5144 | from echo_buffer[] and clear it. | |
5145 | ||
5146 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
5147 | suitable buffer from echo_buffer[] and clear it. | |
5148 | ||
5149 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
5150 | that the current message becomes the last displayed one, make | |
5151 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
5152 | ||
5153 | Value is what FN returns. */ | |
5154 | ||
5155 | static int | |
5156 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4, a5) | |
5157 | struct window *w; | |
5158 | int which; | |
5159 | int (*fn) (); | |
5160 | int a1, a2, a3, a4, a5; | |
5161 | { | |
5162 | Lisp_Object buffer; | |
5163 | int i, this_one, the_other, clear_buffer_p, rc; | |
5164 | int count = specpdl_ptr - specpdl; | |
5165 | ||
5166 | /* If buffers aren't life, make new ones. */ | |
5167 | for (i = 0; i < 2; ++i) | |
5168 | if (!BUFFERP (echo_buffer[i]) | |
5169 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
5170 | { | |
5171 | char name[30]; | |
5172 | sprintf (name, " *Echo Area %d*", i); | |
5173 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
5174 | } | |
5175 | ||
5176 | clear_buffer_p = 0; | |
5177 | ||
5178 | if (which == 0) | |
5179 | this_one = 0, the_other = 1; | |
5180 | else if (which > 0) | |
5181 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 5182 | else |
c6e89d6c GM |
5183 | { |
5184 | this_one = 0, the_other = 1; | |
5185 | clear_buffer_p = 1; | |
5186 | ||
5187 | /* We need a fresh one in case the current echo buffer equals | |
5188 | the one containing the last displayed echo area message. */ | |
5189 | if (!NILP (echo_area_buffer[this_one]) | |
5190 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
5191 | echo_area_buffer[this_one] = Qnil; | |
5192 | ||
5193 | } | |
5194 | ||
5195 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
5196 | have one. */ | |
5197 | if (NILP (echo_area_buffer[this_one])) | |
5198 | { | |
5199 | echo_area_buffer[this_one] | |
5200 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
5201 | ? echo_buffer[the_other] | |
5202 | : echo_buffer[this_one]); | |
5203 | clear_buffer_p = 1; | |
5204 | } | |
5205 | ||
5206 | buffer = echo_area_buffer[this_one]; | |
5207 | ||
5208 | record_unwind_protect (unwind_with_echo_area_buffer, | |
5209 | with_echo_area_buffer_unwind_data (w)); | |
5210 | ||
5211 | /* Make the echo area buffer current. Note that for display | |
5212 | purposes, it is not necessary that the displayed window's buffer | |
5213 | == current_buffer, except for text property lookup. So, let's | |
5214 | only set that buffer temporarily here without doing a full | |
5215 | Fset_window_buffer. We must also change w->pointm, though, | |
5216 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
5217 | aborts. */ | |
9142dd5b | 5218 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
5219 | if (w) |
5220 | { | |
5221 | w->buffer = buffer; | |
5222 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
5223 | } | |
5224 | current_buffer->truncate_lines = Qnil; | |
5225 | current_buffer->undo_list = Qt; | |
5226 | current_buffer->read_only = Qnil; | |
5227 | ||
5228 | if (clear_buffer_p && Z > BEG) | |
5229 | del_range (BEG, Z); | |
5230 | ||
5231 | xassert (BEGV >= BEG); | |
5232 | xassert (ZV <= Z && ZV >= BEGV); | |
5233 | ||
5234 | rc = fn (a1, a2, a3, a4, a5); | |
5235 | ||
5236 | xassert (BEGV >= BEG); | |
5237 | xassert (ZV <= Z && ZV >= BEGV); | |
5238 | ||
5239 | unbind_to (count, Qnil); | |
5240 | return rc; | |
5f5c8ee5 GM |
5241 | } |
5242 | ||
5243 | ||
c6e89d6c GM |
5244 | /* Save state that should be preserved around the call to the function |
5245 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 5246 | |
c6e89d6c GM |
5247 | static Lisp_Object |
5248 | with_echo_area_buffer_unwind_data (w) | |
5249 | struct window *w; | |
5f5c8ee5 | 5250 | { |
c6e89d6c GM |
5251 | int i = 0; |
5252 | Lisp_Object vector; | |
5f5c8ee5 | 5253 | |
c6e89d6c GM |
5254 | /* Reduce consing by keeping one vector in |
5255 | Vwith_echo_area_save_vector. */ | |
5256 | vector = Vwith_echo_area_save_vector; | |
5257 | Vwith_echo_area_save_vector = Qnil; | |
5258 | ||
5259 | if (NILP (vector)) | |
9142dd5b | 5260 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c GM |
5261 | |
5262 | XSETBUFFER (XVECTOR (vector)->contents[i], current_buffer); ++i; | |
5263 | XVECTOR (vector)->contents[i++] = Vdeactivate_mark; | |
5264 | XVECTOR (vector)->contents[i++] = make_number (windows_or_buffers_changed); | |
c6e89d6c GM |
5265 | |
5266 | if (w) | |
5267 | { | |
5268 | XSETWINDOW (XVECTOR (vector)->contents[i], w); ++i; | |
5269 | XVECTOR (vector)->contents[i++] = w->buffer; | |
5270 | XVECTOR (vector)->contents[i++] | |
5271 | = make_number (XMARKER (w->pointm)->charpos); | |
5272 | XVECTOR (vector)->contents[i++] | |
5273 | = make_number (XMARKER (w->pointm)->bytepos); | |
5274 | } | |
5275 | else | |
5276 | { | |
5277 | int end = i + 4; | |
5278 | while (i < end) | |
5279 | XVECTOR (vector)->contents[i++] = Qnil; | |
5280 | } | |
5f5c8ee5 | 5281 | |
c6e89d6c GM |
5282 | xassert (i == XVECTOR (vector)->size); |
5283 | return vector; | |
5284 | } | |
5f5c8ee5 | 5285 | |
5f5c8ee5 | 5286 | |
c6e89d6c GM |
5287 | /* Restore global state from VECTOR which was created by |
5288 | with_echo_area_buffer_unwind_data. */ | |
5289 | ||
5290 | static Lisp_Object | |
5291 | unwind_with_echo_area_buffer (vector) | |
5292 | Lisp_Object vector; | |
5293 | { | |
5294 | int i = 0; | |
5295 | ||
9142dd5b | 5296 | set_buffer_internal_1 (XBUFFER (XVECTOR (vector)->contents[i])); ++i; |
c6e89d6c GM |
5297 | Vdeactivate_mark = XVECTOR (vector)->contents[i]; ++i; |
5298 | windows_or_buffers_changed = XFASTINT (XVECTOR (vector)->contents[i]); ++i; | |
c6e89d6c GM |
5299 | |
5300 | if (WINDOWP (XVECTOR (vector)->contents[i])) | |
5301 | { | |
5302 | struct window *w; | |
5303 | Lisp_Object buffer, charpos, bytepos; | |
5304 | ||
5305 | w = XWINDOW (XVECTOR (vector)->contents[i]); ++i; | |
5306 | buffer = XVECTOR (vector)->contents[i]; ++i; | |
5307 | charpos = XVECTOR (vector)->contents[i]; ++i; | |
5308 | bytepos = XVECTOR (vector)->contents[i]; ++i; | |
5309 | ||
5310 | w->buffer = buffer; | |
5311 | set_marker_both (w->pointm, buffer, | |
5312 | XFASTINT (charpos), XFASTINT (bytepos)); | |
5313 | } | |
5314 | ||
5315 | Vwith_echo_area_save_vector = vector; | |
5316 | return Qnil; | |
5317 | } | |
5318 | ||
5319 | ||
5320 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
5321 | non-zero means we will print multibyte. */ | |
5322 | ||
5323 | void | |
5324 | setup_echo_area_for_printing (multibyte_p) | |
5325 | int multibyte_p; | |
5326 | { | |
5327 | if (!message_buf_print) | |
5328 | { | |
5329 | /* A message has been output since the last time we printed. | |
5330 | Choose a fresh echo area buffer. */ | |
5331 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
5332 | echo_area_buffer[0] = echo_buffer[1]; | |
5333 | else | |
5334 | echo_area_buffer[0] = echo_buffer[0]; | |
5335 | ||
5336 | /* Switch to that buffer and clear it. */ | |
5337 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5338 | if (Z > BEG) | |
5339 | del_range (BEG, Z); | |
5340 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5341 | ||
5342 | /* Set up the buffer for the multibyteness we need. */ | |
5343 | if (multibyte_p | |
5344 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5345 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
5346 | ||
5347 | /* Raise the frame containing the echo area. */ | |
5348 | if (minibuffer_auto_raise) | |
5349 | { | |
5350 | Lisp_Object mini_window; | |
5351 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5352 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5353 | } | |
5354 | ||
5355 | message_buf_print = 1; | |
5356 | } | |
5357 | else if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
5358 | /* Someone switched buffers between print requests. */ | |
5359 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5360 | } | |
5361 | ||
5362 | ||
dd2eb166 GM |
5363 | /* Display an echo area message in window W. Value is non-zero if W's |
5364 | height is changed. If display_last_displayed_message_p is | |
5365 | non-zero, display the message that was last displayed, otherwise | |
5366 | display the current message. */ | |
c6e89d6c GM |
5367 | |
5368 | static int | |
5369 | display_echo_area (w) | |
5370 | struct window *w; | |
5371 | { | |
dd2eb166 GM |
5372 | int i, no_message_p, window_height_changed_p; |
5373 | ||
5374 | /* If there is no message, we must call display_echo_area_1 | |
5375 | nevertheless because it resizes the window. But we will have to | |
5376 | reset the echo_area_buffer in question to nil at the end because | |
5377 | with_echo_area_buffer will sets it to an empty buffer. */ | |
5378 | i = display_last_displayed_message_p ? 1 : 0; | |
5379 | no_message_p = NILP (echo_area_buffer[i]); | |
5380 | ||
5381 | window_height_changed_p | |
5382 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
5383 | (int (*) ()) display_echo_area_1, w); | |
5384 | ||
5385 | if (no_message_p) | |
5386 | echo_area_buffer[i] = Qnil; | |
5387 | ||
5388 | return window_height_changed_p; | |
c6e89d6c GM |
5389 | } |
5390 | ||
5391 | ||
5392 | /* Helper for display_echo_area. Display the current buffer which | |
5393 | contains the current echo area message in window W, a mini-window. | |
5394 | Change the height of W so that all of the message is displayed. | |
5395 | Value is non-zero if height of W was changed. */ | |
5396 | ||
5397 | static int | |
5398 | display_echo_area_1 (w) | |
5399 | struct window *w; | |
5400 | { | |
5401 | Lisp_Object window; | |
5402 | struct frame *f = XFRAME (w->frame); | |
5403 | struct text_pos start; | |
5404 | int window_height_changed_p = 0; | |
5405 | ||
5406 | /* Do this before displaying, so that we have a large enough glyph | |
5407 | matrix for the display. */ | |
5408 | window_height_changed_p = resize_mini_window (w); | |
5409 | ||
5410 | /* Display. */ | |
5411 | clear_glyph_matrix (w->desired_matrix); | |
5412 | XSETWINDOW (window, w); | |
5413 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
5414 | try_window (window, start); | |
5415 | ||
c6e89d6c GM |
5416 | return window_height_changed_p; |
5417 | } | |
5418 | ||
5419 | ||
5420 | /* Resize mini-window W to fit the size of its contents. Value is | |
5421 | non-zero if the window height has been changed. */ | |
5422 | ||
5423 | static int | |
5424 | resize_mini_window (w) | |
5425 | struct window *w; | |
5426 | { | |
5427 | struct frame *f = XFRAME (w->frame); | |
5428 | int window_height_changed_p = 0; | |
5429 | ||
5430 | xassert (MINI_WINDOW_P (w)); | |
5431 | ||
5432 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
5433 | { | |
5434 | struct it it; | |
dd2eb166 GM |
5435 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
5436 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
5437 | int height, max_height; | |
5438 | int unit = CANON_Y_UNIT (f); | |
5439 | struct text_pos start; | |
9142dd5b | 5440 | |
c6e89d6c | 5441 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 5442 | |
dd2eb166 GM |
5443 | /* Compute the max. number of lines specified by the user. */ |
5444 | if (FLOATP (Vmax_mini_window_height)) | |
5445 | max_height = XFLOATINT (Vmax_mini_window_height) * total_height; | |
5446 | else if (INTEGERP (Vmax_mini_window_height)) | |
5447 | max_height = XINT (Vmax_mini_window_height); | |
5448 | ||
5449 | /* Correct that max. height if it's bogus. */ | |
5450 | max_height = max (1, max_height); | |
5451 | max_height = min (total_height, max_height); | |
5452 | ||
5453 | /* Find out the height of the text in the window. */ | |
5454 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
5455 | height = (unit - 1 + it.current_y + last_height) / unit; | |
5456 | height = max (1, height); | |
5457 | ||
5458 | /* Compute a suitable window start. */ | |
5459 | if (height > max_height) | |
5460 | { | |
5461 | height = max_height; | |
5462 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
5463 | move_it_vertically_backward (&it, (height - 1) * unit); | |
5464 | start = it.current.pos; | |
5465 | } | |
5466 | else | |
5467 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
5468 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a GM |
5469 | |
5470 | if (NILP (Vresize_mini_config)) | |
dd2eb166 | 5471 | { |
c59c668a GM |
5472 | if (height != XFASTINT (w->height)) |
5473 | { | |
5474 | Lisp_Object old_selected_window; | |
5475 | Lisp_Object config; | |
5476 | struct gcpro gcpro1; | |
5477 | ||
5478 | resize_mini_initial_height = XFASTINT (w->height); | |
5479 | config = Fcurrent_window_configuration (Qnil); | |
5480 | GCPRO1 (config); | |
5481 | ||
5482 | old_selected_window = selected_window; | |
5483 | XSETWINDOW (selected_window, w); | |
5484 | change_window_height (height - XFASTINT (w->height), 0); | |
5485 | selected_window = old_selected_window; | |
5486 | ||
5487 | window_height_changed_p = 1; | |
9142dd5b | 5488 | |
c59c668a GM |
5489 | /* Set this after changing window sizes, or else |
5490 | Vresize_mini_config would be reset in | |
5491 | adjust_frame_glyphs. */ | |
5492 | resize_mini_frame = XFRAME (w->frame); | |
5493 | Vresize_mini_config = config; | |
5494 | UNGCPRO; | |
5495 | } | |
c6e89d6c | 5496 | } |
c59c668a | 5497 | else if (height != XFASTINT (w->height)) |
9142dd5b | 5498 | { |
c59c668a GM |
5499 | if (height == resize_mini_initial_height) |
5500 | { | |
5501 | Fset_window_configuration (Vresize_mini_config); | |
5502 | Vresize_mini_config = Qnil; | |
5503 | resize_mini_frame = NULL; | |
5504 | } | |
5505 | else | |
5506 | { | |
5507 | Lisp_Object old_selected_window; | |
5508 | old_selected_window = selected_window; | |
5509 | XSETWINDOW (selected_window, w); | |
5510 | change_window_height (height - XFASTINT (w->height), 0); | |
5511 | selected_window = old_selected_window; | |
5512 | } | |
5513 | ||
9142dd5b GM |
5514 | window_height_changed_p = 1; |
5515 | } | |
c6e89d6c GM |
5516 | } |
5517 | ||
5518 | return window_height_changed_p; | |
5519 | } | |
5520 | ||
5521 | ||
5522 | /* Value is the current message, a string, or nil if there is no | |
5523 | current message. */ | |
5524 | ||
5525 | Lisp_Object | |
5526 | current_message () | |
5527 | { | |
5528 | Lisp_Object msg; | |
5529 | ||
5530 | if (NILP (echo_area_buffer[0])) | |
5531 | msg = Qnil; | |
5532 | else | |
5533 | { | |
5534 | with_echo_area_buffer (0, 0, (int (*) ()) current_message_1, &msg); | |
5535 | if (NILP (msg)) | |
5536 | echo_area_buffer[0] = Qnil; | |
5537 | } | |
5538 | ||
5539 | return msg; | |
5540 | } | |
5541 | ||
5542 | ||
5543 | static int | |
5544 | current_message_1 (msg) | |
5545 | Lisp_Object *msg; | |
5546 | { | |
5547 | if (Z > BEG) | |
5548 | *msg = make_buffer_string (BEG, Z, 1); | |
5549 | else | |
5550 | *msg = Qnil; | |
5551 | return 0; | |
5552 | } | |
5553 | ||
5554 | ||
5555 | /* Push the current message on Vmessage_stack for later restauration | |
5556 | by restore_message. Value is non-zero if the current message isn't | |
5557 | empty. This is a relatively infrequent operation, so it's not | |
5558 | worth optimizing. */ | |
5559 | ||
5560 | int | |
5561 | push_message () | |
5562 | { | |
5563 | Lisp_Object msg; | |
5564 | msg = current_message (); | |
5565 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
5566 | return STRINGP (msg); | |
5567 | } | |
5568 | ||
5569 | ||
5570 | /* Restore message display from the top of Vmessage_stack. */ | |
5571 | ||
5572 | void | |
5573 | restore_message () | |
5574 | { | |
5575 | Lisp_Object msg; | |
5576 | ||
5577 | xassert (CONSP (Vmessage_stack)); | |
5578 | msg = XCAR (Vmessage_stack); | |
5579 | if (STRINGP (msg)) | |
5580 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
5581 | else | |
5582 | message3_nolog (msg, 0, 0); | |
5583 | } | |
5584 | ||
5585 | ||
5586 | /* Pop the top-most entry off Vmessage_stack. */ | |
5587 | ||
5588 | void | |
5589 | pop_message () | |
5590 | { | |
5591 | xassert (CONSP (Vmessage_stack)); | |
5592 | Vmessage_stack = XCDR (Vmessage_stack); | |
5593 | } | |
5594 | ||
5595 | ||
5596 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
5597 | exits. If the stack is not empty, we have a missing pop_message | |
5598 | somewhere. */ | |
5599 | ||
5600 | void | |
5601 | check_message_stack () | |
5602 | { | |
5603 | if (!NILP (Vmessage_stack)) | |
5604 | abort (); | |
5605 | } | |
5606 | ||
5607 | ||
5608 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
5609 | time we display it---but don't redisplay it now. */ | |
5610 | ||
5611 | void | |
5612 | truncate_echo_area (nchars) | |
5613 | int nchars; | |
5614 | { | |
5615 | if (nchars == 0) | |
5616 | echo_area_buffer[0] = Qnil; | |
5617 | /* A null message buffer means that the frame hasn't really been | |
5618 | initialized yet. Error messages get reported properly by | |
5619 | cmd_error, so this must be just an informative message; toss it. */ | |
5620 | else if (!noninteractive | |
5621 | && INTERACTIVE | |
5622 | && FRAME_MESSAGE_BUF (selected_frame) | |
5623 | && !NILP (echo_area_buffer[0])) | |
5624 | with_echo_area_buffer (0, 0, (int (*) ()) truncate_message_1, nchars); | |
5625 | } | |
5626 | ||
5627 | ||
5628 | /* Helper function for truncate_echo_area. Truncate the current | |
5629 | message to at most NCHARS characters. */ | |
5630 | ||
5631 | static int | |
5632 | truncate_message_1 (nchars) | |
5633 | int nchars; | |
5634 | { | |
5635 | if (BEG + nchars < Z) | |
5636 | del_range (BEG + nchars, Z); | |
5637 | if (Z == BEG) | |
5638 | echo_area_buffer[0] = Qnil; | |
5639 | return 0; | |
5640 | } | |
5641 | ||
5642 | ||
5643 | /* Set the current message to a substring of S or STRING. | |
5644 | ||
5645 | If STRING is a Lisp string, set the message to the first NBYTES | |
5646 | bytes from STRING. NBYTES zero means use the whole string. If | |
5647 | STRING is multibyte, the message will be displayed multibyte. | |
5648 | ||
5649 | If S is not null, set the message to the first LEN bytes of S. LEN | |
5650 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
5651 | multibyte. Display the message multibyte in that case. */ | |
5652 | ||
5653 | void | |
5654 | set_message (s, string, nbytes, multibyte_p) | |
5655 | char *s; | |
5656 | Lisp_Object string; | |
5657 | int nbytes; | |
5658 | { | |
5659 | message_enable_multibyte | |
5660 | = ((s && multibyte_p) | |
5661 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
5662 | ||
5663 | with_echo_area_buffer (0, -1, (int (*) ()) set_message_1, | |
5664 | s, string, nbytes, multibyte_p); | |
5665 | message_buf_print = 0; | |
5666 | } | |
5667 | ||
5668 | ||
5669 | /* Helper function for set_message. Arguments have the same meaning | |
5670 | as there. This function is called with the echo area buffer being | |
5671 | current. */ | |
5672 | ||
5673 | static int | |
5674 | set_message_1 (s, string, nbytes, multibyte_p) | |
5675 | char *s; | |
5676 | Lisp_Object string; | |
5677 | int nbytes, multibyte_p; | |
5678 | { | |
5679 | xassert (BEG == Z); | |
5680 | ||
5681 | /* Change multibyteness of the echo buffer appropriately. */ | |
5682 | if (message_enable_multibyte | |
5683 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5684 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
5685 | ||
5686 | /* Insert new message at BEG. */ | |
5687 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5688 | ||
5689 | if (STRINGP (string)) | |
5690 | { | |
5691 | int nchars; | |
5692 | ||
5693 | if (nbytes == 0) | |
5694 | nbytes = XSTRING (string)->size_byte; | |
5695 | nchars = string_byte_to_char (string, nbytes); | |
5696 | ||
5697 | /* This function takes care of single/multibyte conversion. We | |
5698 | just have to ensure that the echo area buffer has the right | |
5699 | setting of enable_multibyte_characters. */ | |
5700 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
5701 | } | |
5702 | else if (s) | |
5703 | { | |
5704 | if (nbytes == 0) | |
5705 | nbytes = strlen (s); | |
5706 | ||
5707 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
5708 | { | |
5709 | /* Convert from multi-byte to single-byte. */ | |
5710 | int i, c, n; | |
5711 | unsigned char work[1]; | |
5712 | ||
5713 | /* Convert a multibyte string to single-byte. */ | |
5714 | for (i = 0; i < nbytes; i += n) | |
5715 | { | |
5716 | c = string_char_and_length (s + i, nbytes - i, &n); | |
5717 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
5718 | ? c | |
5719 | : multibyte_char_to_unibyte (c, Qnil)); | |
5720 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5721 | } | |
5722 | } | |
5723 | else if (!multibyte_p | |
5724 | && !NILP (current_buffer->enable_multibyte_characters)) | |
5725 | { | |
5726 | /* Convert from single-byte to multi-byte. */ | |
5727 | int i, c, n; | |
5728 | unsigned char *msg = (unsigned char *) s; | |
5729 | unsigned char *str, work[4]; | |
5730 | ||
5731 | /* Convert a single-byte string to multibyte. */ | |
5732 | for (i = 0; i < nbytes; i++) | |
5733 | { | |
5734 | c = unibyte_char_to_multibyte (msg[i]); | |
5735 | n = CHAR_STRING (c, work, str); | |
5736 | insert_1_both (work, 1, n, 1, 0, 0); | |
5737 | } | |
5738 | } | |
5739 | else | |
5740 | insert_1 (s, nbytes, 1, 0, 0); | |
5741 | } | |
5742 | ||
5743 | return 0; | |
5744 | } | |
5745 | ||
5746 | ||
5747 | /* Clear messages. CURRENT_P non-zero means clear the current | |
5748 | message. LAST_DISPLAYED_P non-zero means clear the message | |
5749 | last displayed. */ | |
5750 | ||
5751 | void | |
5752 | clear_message (current_p, last_displayed_p) | |
5753 | int current_p, last_displayed_p; | |
5754 | { | |
5755 | if (current_p) | |
5756 | echo_area_buffer[0] = Qnil; | |
5757 | ||
5758 | if (last_displayed_p) | |
5759 | echo_area_buffer[1] = Qnil; | |
5760 | ||
5761 | message_buf_print = 0; | |
5762 | } | |
5763 | ||
5764 | /* Clear garbaged frames. | |
5765 | ||
5766 | This function is used where the old redisplay called | |
5767 | redraw_garbaged_frames which in turn called redraw_frame which in | |
5768 | turn called clear_frame. The call to clear_frame was a source of | |
5769 | flickering. I believe a clear_frame is not necessary. It should | |
5770 | suffice in the new redisplay to invalidate all current matrices, | |
5771 | and ensure a complete redisplay of all windows. */ | |
5772 | ||
5773 | static void | |
5774 | clear_garbaged_frames () | |
5775 | { | |
5f5c8ee5 GM |
5776 | if (frame_garbaged) |
5777 | { | |
5f5c8ee5 GM |
5778 | Lisp_Object tail, frame; |
5779 | ||
5780 | FOR_EACH_FRAME (tail, frame) | |
5781 | { | |
5782 | struct frame *f = XFRAME (frame); | |
5783 | ||
5784 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
5785 | { | |
5786 | clear_current_matrices (f); | |
5787 | f->garbaged = 0; | |
5788 | } | |
5789 | } | |
5790 | ||
5791 | frame_garbaged = 0; | |
5792 | ++windows_or_buffers_changed; | |
5793 | } | |
c6e89d6c | 5794 | } |
5f5c8ee5 | 5795 | |
5f5c8ee5 | 5796 | |
c6e89d6c GM |
5797 | /* Redisplay the echo area of selected_frame. If UPDATE_FRAME_P is |
5798 | non-zero update selected_frame. Value is non-zero if the | |
5799 | mini-windows height has been changed. */ | |
5f5c8ee5 | 5800 | |
c6e89d6c GM |
5801 | static int |
5802 | echo_area_display (update_frame_p) | |
5803 | int update_frame_p; | |
5804 | { | |
5805 | Lisp_Object mini_window; | |
5806 | struct window *w; | |
5807 | struct frame *f; | |
5808 | int window_height_changed_p = 0; | |
5809 | ||
5810 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
5811 | w = XWINDOW (mini_window); | |
5812 | f = XFRAME (WINDOW_FRAME (w)); | |
5813 | ||
5814 | /* Don't display if frame is invisible or not yet initialized. */ | |
5815 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
5816 | return 0; | |
5f5c8ee5 | 5817 | |
c6e89d6c GM |
5818 | /* When Emacs starts, selected_frame may be a visible terminal |
5819 | frame, even if we run under a window system. If we let this | |
5820 | through, a message would be displayed on the terminal. */ | |
5821 | #ifdef HAVE_WINDOW_SYSTEM | |
5822 | if (!inhibit_window_system && !FRAME_WINDOW_P (selected_frame)) | |
5823 | return 0; | |
5824 | #endif /* HAVE_WINDOW_SYSTEM */ | |
5825 | ||
5826 | /* Redraw garbaged frames. */ | |
5827 | if (frame_garbaged) | |
5828 | clear_garbaged_frames (); | |
5829 | ||
5830 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
5831 | { | |
5832 | echo_area_window = mini_window; | |
5833 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 5834 | w->must_be_updated_p = 1; |
c59c668a | 5835 | |
5f5c8ee5 GM |
5836 | if (update_frame_p) |
5837 | { | |
c59c668a GM |
5838 | /* Not called from redisplay_internal. If we changed |
5839 | window configuration, we must redisplay thoroughly. | |
5840 | Otherwise, we can do with updating what we displayed | |
5841 | above. */ | |
5842 | if (window_height_changed_p) | |
5843 | { | |
5844 | ++windows_or_buffers_changed; | |
5845 | ++update_mode_lines; | |
5846 | redisplay_internal (0); | |
5847 | } | |
5848 | else if (FRAME_WINDOW_P (f)) | |
5f5c8ee5 GM |
5849 | { |
5850 | update_single_window (w, 1); | |
5851 | rif->flush_display (f); | |
5852 | } | |
5853 | else | |
5854 | update_frame (f, 1, 1); | |
5855 | } | |
5856 | } | |
5857 | else if (!EQ (mini_window, selected_window)) | |
5858 | windows_or_buffers_changed++; | |
c59c668a GM |
5859 | |
5860 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
5861 | echo_area_buffer[1] = echo_area_buffer[0]; |
5862 | ||
5f5c8ee5 GM |
5863 | /* Prevent redisplay optimization in redisplay_internal by resetting |
5864 | this_line_start_pos. This is done because the mini-buffer now | |
5865 | displays the message instead of its buffer text. */ | |
5866 | if (EQ (mini_window, selected_window)) | |
5867 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
5868 | |
5869 | return window_height_changed_p; | |
5f5c8ee5 GM |
5870 | } |
5871 | ||
5872 | ||
5873 | \f | |
5874 | /*********************************************************************** | |
5875 | Frame Titles | |
5876 | ***********************************************************************/ | |
5877 | ||
5878 | ||
5879 | #ifdef HAVE_WINDOW_SYSTEM | |
5880 | ||
5881 | /* A buffer for constructing frame titles in it; allocated from the | |
5882 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
5883 | ||
5884 | static char *frame_title_buf; | |
5885 | ||
5886 | /* The buffer's end, and a current output position in it. */ | |
5887 | ||
5888 | static char *frame_title_buf_end; | |
5889 | static char *frame_title_ptr; | |
5890 | ||
5891 | ||
5892 | /* Store a single character C for the frame title in frame_title_buf. | |
5893 | Re-allocate frame_title_buf if necessary. */ | |
5894 | ||
5895 | static void | |
5896 | store_frame_title_char (c) | |
5897 | char c; | |
5898 | { | |
5899 | /* If output position has reached the end of the allocated buffer, | |
5900 | double the buffer's size. */ | |
5901 | if (frame_title_ptr == frame_title_buf_end) | |
5902 | { | |
5903 | int len = frame_title_ptr - frame_title_buf; | |
5904 | int new_size = 2 * len * sizeof *frame_title_buf; | |
5905 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
5906 | frame_title_buf_end = frame_title_buf + new_size; | |
5907 | frame_title_ptr = frame_title_buf + len; | |
5908 | } | |
5909 | ||
5910 | *frame_title_ptr++ = c; | |
5911 | } | |
5912 | ||
5913 | ||
5914 | /* Store part of a frame title in frame_title_buf, beginning at | |
5915 | frame_title_ptr. STR is the string to store. Do not copy more | |
5916 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
5917 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
5918 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
5919 | Called from display_mode_element when it is used to build a frame | |
5920 | title. */ | |
5921 | ||
5922 | static int | |
5923 | store_frame_title (str, field_width, precision) | |
5924 | unsigned char *str; | |
5925 | int field_width, precision; | |
5926 | { | |
5927 | int n = 0; | |
5928 | ||
5929 | /* Copy at most PRECISION chars from STR. */ | |
5930 | while ((precision <= 0 || n < precision) | |
5931 | && *str) | |
5932 | { | |
5933 | store_frame_title_char (*str++); | |
5934 | ++n; | |
5935 | } | |
5936 | ||
5937 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
5938 | while (field_width > 0 | |
5939 | && n < field_width) | |
5940 | { | |
5941 | store_frame_title_char (' '); | |
5942 | ++n; | |
5943 | } | |
5944 | ||
5945 | return n; | |
5946 | } | |
5947 | ||
5948 | ||
5949 | /* Set the title of FRAME, if it has changed. The title format is | |
5950 | Vicon_title_format if FRAME is iconified, otherwise it is | |
5951 | frame_title_format. */ | |
5952 | ||
5953 | static void | |
5954 | x_consider_frame_title (frame) | |
5955 | Lisp_Object frame; | |
5956 | { | |
5957 | struct frame *f = XFRAME (frame); | |
5958 | ||
5959 | if (FRAME_WINDOW_P (f) | |
5960 | || FRAME_MINIBUF_ONLY_P (f) | |
5961 | || f->explicit_name) | |
5962 | { | |
5963 | /* Do we have more than one visible frame on this X display? */ | |
5964 | Lisp_Object tail; | |
5965 | Lisp_Object fmt; | |
5966 | struct buffer *obuf; | |
5967 | int len; | |
5968 | struct it it; | |
5969 | ||
5970 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) | |
5971 | { | |
5972 | struct frame *tf = XFRAME (XCONS (tail)->car); | |
5973 | ||
5974 | if (tf != f | |
5975 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
5976 | && !FRAME_MINIBUF_ONLY_P (tf) | |
5977 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
5978 | break; | |
5979 | } | |
5980 | ||
5981 | /* Set global variable indicating that multiple frames exist. */ | |
5982 | multiple_frames = CONSP (tail); | |
5983 | ||
5984 | /* Switch to the buffer of selected window of the frame. Set up | |
5985 | frame_title_ptr so that display_mode_element will output into it; | |
5986 | then display the title. */ | |
5987 | obuf = current_buffer; | |
5988 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
5989 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
5990 | frame_title_ptr = frame_title_buf; | |
5991 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
5992 | NULL, DEFAULT_FACE_ID); | |
5993 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
5994 | frame_title_ptr = NULL; | |
5995 | set_buffer_internal (obuf); | |
5996 | ||
5997 | /* Set the title only if it's changed. This avoids consing in | |
5998 | the common case where it hasn't. (If it turns out that we've | |
5999 | already wasted too much time by walking through the list with | |
6000 | display_mode_element, then we might need to optimize at a | |
6001 | higher level than this.) */ | |
6002 | if (! STRINGP (f->name) | |
6003 | || STRING_BYTES (XSTRING (f->name)) != len | |
6004 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
6005 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
6006 | } | |
6007 | } | |
6008 | ||
6009 | #else /* not HAVE_WINDOW_SYSTEM */ | |
6010 | ||
6011 | #define frame_title_ptr ((char *)0) | |
6012 | #define store_frame_title(str, mincol, maxcol) 0 | |
6013 | ||
6014 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
6015 | ||
6016 | ||
6017 | ||
6018 | \f | |
6019 | /*********************************************************************** | |
6020 | Menu Bars | |
6021 | ***********************************************************************/ | |
6022 | ||
6023 | ||
6024 | /* Prepare for redisplay by updating menu-bar item lists when | |
6025 | appropriate. This can call eval. */ | |
6026 | ||
6027 | void | |
6028 | prepare_menu_bars () | |
6029 | { | |
6030 | int all_windows; | |
6031 | struct gcpro gcpro1, gcpro2; | |
6032 | struct frame *f; | |
6033 | struct frame *tooltip_frame; | |
6034 | ||
6035 | #ifdef HAVE_X_WINDOWS | |
6036 | tooltip_frame = tip_frame; | |
6037 | #else | |
6038 | tooltip_frame = NULL; | |
6039 | #endif | |
6040 | ||
6041 | /* Update all frame titles based on their buffer names, etc. We do | |
6042 | this before the menu bars so that the buffer-menu will show the | |
6043 | up-to-date frame titles. */ | |
6044 | #ifdef HAVE_WINDOW_SYSTEM | |
6045 | if (windows_or_buffers_changed || update_mode_lines) | |
6046 | { | |
6047 | Lisp_Object tail, frame; | |
6048 | ||
6049 | FOR_EACH_FRAME (tail, frame) | |
6050 | { | |
6051 | f = XFRAME (frame); | |
6052 | if (f != tooltip_frame | |
6053 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
6054 | x_consider_frame_title (frame); | |
6055 | } | |
6056 | } | |
6057 | #endif /* HAVE_WINDOW_SYSTEM */ | |
6058 | ||
6059 | /* Update the menu bar item lists, if appropriate. This has to be | |
6060 | done before any actual redisplay or generation of display lines. */ | |
6061 | all_windows = (update_mode_lines | |
6062 | || buffer_shared > 1 | |
6063 | || windows_or_buffers_changed); | |
6064 | if (all_windows) | |
6065 | { | |
6066 | Lisp_Object tail, frame; | |
6067 | int count = specpdl_ptr - specpdl; | |
6068 | ||
6069 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6070 | ||
6071 | FOR_EACH_FRAME (tail, frame) | |
6072 | { | |
6073 | f = XFRAME (frame); | |
6074 | ||
6075 | /* Ignore tooltip frame. */ | |
6076 | if (f == tooltip_frame) | |
6077 | continue; | |
6078 | ||
6079 | /* If a window on this frame changed size, report that to | |
6080 | the user and clear the size-change flag. */ | |
6081 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
6082 | { | |
6083 | Lisp_Object functions; | |
6084 | ||
6085 | /* Clear flag first in case we get an error below. */ | |
6086 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
6087 | functions = Vwindow_size_change_functions; | |
6088 | GCPRO2 (tail, functions); | |
6089 | ||
6090 | while (CONSP (functions)) | |
6091 | { | |
6092 | call1 (XCAR (functions), frame); | |
6093 | functions = XCDR (functions); | |
6094 | } | |
6095 | UNGCPRO; | |
6096 | } | |
6097 | ||
6098 | GCPRO1 (tail); | |
6099 | update_menu_bar (f, 0); | |
6100 | #ifdef HAVE_WINDOW_SYSTEM | |
6101 | update_toolbar (f, 0); | |
6102 | #endif | |
6103 | UNGCPRO; | |
6104 | } | |
6105 | ||
6106 | unbind_to (count, Qnil); | |
6107 | } | |
6108 | else | |
6109 | { | |
6110 | update_menu_bar (selected_frame, 1); | |
6111 | #ifdef HAVE_WINDOW_SYSTEM | |
6112 | update_toolbar (selected_frame, 1); | |
6113 | #endif | |
6114 | } | |
6115 | ||
6116 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
6117 | pending_menu_activation is not defined. */ | |
6118 | #ifdef USE_X_TOOLKIT | |
6119 | pending_menu_activation = 0; | |
6120 | #endif | |
6121 | } | |
6122 | ||
6123 | ||
6124 | /* Update the menu bar item list for frame F. This has to be done | |
6125 | before we start to fill in any display lines, because it can call | |
6126 | eval. | |
6127 | ||
6128 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
6129 | ||
6130 | static void | |
6131 | update_menu_bar (f, save_match_data) | |
6132 | struct frame *f; | |
6133 | int save_match_data; | |
6134 | { | |
6135 | Lisp_Object window; | |
6136 | register struct window *w; | |
6137 | ||
6138 | window = FRAME_SELECTED_WINDOW (f); | |
6139 | w = XWINDOW (window); | |
6140 | ||
6141 | if (update_mode_lines) | |
6142 | w->update_mode_line = Qt; | |
6143 | ||
6144 | if (FRAME_WINDOW_P (f) | |
6145 | ? | |
6146 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6147 | FRAME_EXTERNAL_MENU_BAR (f) | |
6148 | #else | |
6149 | FRAME_MENU_BAR_LINES (f) > 0 | |
6150 | #endif | |
6151 | : FRAME_MENU_BAR_LINES (f) > 0) | |
6152 | { | |
6153 | /* If the user has switched buffers or windows, we need to | |
6154 | recompute to reflect the new bindings. But we'll | |
6155 | recompute when update_mode_lines is set too; that means | |
6156 | that people can use force-mode-line-update to request | |
6157 | that the menu bar be recomputed. The adverse effect on | |
6158 | the rest of the redisplay algorithm is about the same as | |
6159 | windows_or_buffers_changed anyway. */ | |
6160 | if (windows_or_buffers_changed | |
6161 | || !NILP (w->update_mode_line) | |
6162 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6163 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6164 | != !NILP (w->last_had_star)) | |
6165 | || ((!NILP (Vtransient_mark_mode) | |
6166 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6167 | != !NILP (w->region_showing))) | |
6168 | { | |
6169 | struct buffer *prev = current_buffer; | |
6170 | int count = specpdl_ptr - specpdl; | |
6171 | ||
6172 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
6173 | if (save_match_data) | |
6174 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6175 | if (NILP (Voverriding_local_map_menu_flag)) | |
6176 | { | |
6177 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6178 | specbind (Qoverriding_local_map, Qnil); | |
6179 | } | |
6180 | ||
6181 | /* Run the Lucid hook. */ | |
6182 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
6183 | ||
6184 | /* If it has changed current-menubar from previous value, | |
6185 | really recompute the menu-bar from the value. */ | |
6186 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
6187 | call0 (Qrecompute_lucid_menubar); | |
6188 | ||
6189 | safe_run_hooks (Qmenu_bar_update_hook); | |
6190 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
6191 | ||
6192 | /* Redisplay the menu bar in case we changed it. */ | |
6193 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6194 | if (FRAME_WINDOW_P (f)) | |
6195 | set_frame_menubar (f, 0, 0); | |
6196 | else | |
6197 | /* On a terminal screen, the menu bar is an ordinary screen | |
6198 | line, and this makes it get updated. */ | |
6199 | w->update_mode_line = Qt; | |
6200 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6201 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
6202 | line, and this makes it get updated. */ | |
6203 | w->update_mode_line = Qt; | |
6204 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6205 | ||
6206 | unbind_to (count, Qnil); | |
6207 | set_buffer_internal_1 (prev); | |
6208 | } | |
6209 | } | |
6210 | } | |
6211 | ||
6212 | ||
6213 | \f | |
6214 | /*********************************************************************** | |
6215 | Toolbars | |
6216 | ***********************************************************************/ | |
6217 | ||
6218 | #ifdef HAVE_WINDOW_SYSTEM | |
6219 | ||
6220 | /* Update the toolbar item list for frame F. This has to be done | |
6221 | before we start to fill in any display lines. Called from | |
6222 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
6223 | and restore it here. */ | |
6224 | ||
6225 | static void | |
6226 | update_toolbar (f, save_match_data) | |
6227 | struct frame *f; | |
6228 | int save_match_data; | |
6229 | { | |
6230 | if (WINDOWP (f->toolbar_window) | |
6231 | && XFASTINT (XWINDOW (f->toolbar_window)->height) > 0) | |
6232 | { | |
6233 | Lisp_Object window; | |
6234 | struct window *w; | |
6235 | ||
6236 | window = FRAME_SELECTED_WINDOW (f); | |
6237 | w = XWINDOW (window); | |
6238 | ||
6239 | /* If the user has switched buffers or windows, we need to | |
6240 | recompute to reflect the new bindings. But we'll | |
6241 | recompute when update_mode_lines is set too; that means | |
6242 | that people can use force-mode-line-update to request | |
6243 | that the menu bar be recomputed. The adverse effect on | |
6244 | the rest of the redisplay algorithm is about the same as | |
6245 | windows_or_buffers_changed anyway. */ | |
6246 | if (windows_or_buffers_changed | |
6247 | || !NILP (w->update_mode_line) | |
6248 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6249 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6250 | != !NILP (w->last_had_star)) | |
6251 | || ((!NILP (Vtransient_mark_mode) | |
6252 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6253 | != !NILP (w->region_showing))) | |
6254 | { | |
6255 | struct buffer *prev = current_buffer; | |
6256 | int count = specpdl_ptr - specpdl; | |
a2889657 | 6257 | |
5f5c8ee5 GM |
6258 | /* Set current_buffer to the buffer of the selected |
6259 | window of the frame, so that we get the right local | |
6260 | keymaps. */ | |
6261 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 6262 | |
5f5c8ee5 GM |
6263 | /* Save match data, if we must. */ |
6264 | if (save_match_data) | |
6265 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6266 | ||
6267 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
6268 | if (NILP (Voverriding_local_map_menu_flag)) | |
6269 | { | |
6270 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6271 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 6272 | } |
1f40cad2 | 6273 | |
5f5c8ee5 GM |
6274 | /* Build desired toolbar items from keymaps. */ |
6275 | f->desired_toolbar_items | |
6276 | = toolbar_items (f->desired_toolbar_items, | |
6277 | &f->n_desired_toolbar_items); | |
6278 | ||
6279 | /* Redisplay the toolbar in case we changed it. */ | |
6280 | w->update_mode_line = Qt; | |
6281 | ||
6282 | unbind_to (count, Qnil); | |
6283 | set_buffer_internal_1 (prev); | |
81d478f3 | 6284 | } |
a2889657 JB |
6285 | } |
6286 | } | |
6287 | ||
6c4429a5 | 6288 | |
5f5c8ee5 GM |
6289 | /* Set F->desired_toolbar_string to a Lisp string representing frame |
6290 | F's desired toolbar contents. F->desired_toolbar_items must have | |
6291 | been set up previously by calling prepare_menu_bars. */ | |
6292 | ||
a2889657 | 6293 | static void |
5f5c8ee5 GM |
6294 | build_desired_toolbar_string (f) |
6295 | struct frame *f; | |
a2889657 | 6296 | { |
5f5c8ee5 GM |
6297 | int i, size, size_needed, string_idx; |
6298 | struct gcpro gcpro1, gcpro2, gcpro3; | |
6299 | Lisp_Object image, plist, props; | |
a2889657 | 6300 | |
5f5c8ee5 GM |
6301 | image = plist = props = Qnil; |
6302 | GCPRO3 (image, plist, props); | |
a2889657 | 6303 | |
5f5c8ee5 GM |
6304 | /* Prepare F->desired_toolbar_string. If we can reuse it, do so. |
6305 | Otherwise, make a new string. */ | |
6306 | ||
6307 | /* The size of the string we might be able to reuse. */ | |
6308 | size = (STRINGP (f->desired_toolbar_string) | |
6309 | ? XSTRING (f->desired_toolbar_string)->size | |
6310 | : 0); | |
6311 | ||
6312 | /* Each image in the string we build is preceded by a space, | |
6313 | and there is a space at the end. */ | |
6314 | size_needed = f->n_desired_toolbar_items + 1; | |
6315 | ||
6316 | /* Reuse f->desired_toolbar_string, if possible. */ | |
6317 | if (size < size_needed) | |
6318 | f->desired_toolbar_string = Fmake_string (make_number (size_needed), ' '); | |
6319 | else | |
6320 | { | |
6321 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
6322 | Fremove_text_properties (make_number (0), make_number (size), | |
6323 | props, f->desired_toolbar_string); | |
6324 | } | |
a2889657 | 6325 | |
5f5c8ee5 GM |
6326 | /* Put a `display' property on the string for the images to display, |
6327 | put a `menu_item' property on toolbar items with a value that | |
6328 | is the index of the item in F's toolbar item vector. */ | |
6329 | for (i = 0, string_idx = 0; | |
6330 | i < f->n_desired_toolbar_items; | |
6331 | ++i, string_idx += 1) | |
a2889657 | 6332 | { |
5f5c8ee5 GM |
6333 | #define PROP(IDX) \ |
6334 | (XVECTOR (f->desired_toolbar_items) \ | |
6335 | ->contents[i * TOOLBAR_ITEM_NSLOTS + (IDX)]) | |
6336 | ||
6337 | int enabled_p = !NILP (PROP (TOOLBAR_ITEM_ENABLED_P)); | |
6338 | int selected_p = !NILP (PROP (TOOLBAR_ITEM_SELECTED_P)); | |
6339 | int margin, relief; | |
6340 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; | |
6341 | extern Lisp_Object Qlaplace; | |
6342 | ||
6343 | /* If image is a vector, choose the image according to the | |
6344 | button state. */ | |
6345 | image = PROP (TOOLBAR_ITEM_IMAGES); | |
6346 | if (VECTORP (image)) | |
6347 | { | |
6348 | enum toolbar_item_image idx; | |
6349 | ||
6350 | if (enabled_p) | |
6351 | idx = (selected_p | |
6352 | ? TOOLBAR_IMAGE_ENABLED_SELECTED | |
6353 | : TOOLBAR_IMAGE_ENABLED_DESELECTED); | |
6354 | else | |
6355 | idx = (selected_p | |
6356 | ? TOOLBAR_IMAGE_DISABLED_SELECTED | |
6357 | : TOOLBAR_IMAGE_DISABLED_DESELECTED); | |
6358 | ||
6359 | xassert (XVECTOR (image)->size >= idx); | |
6360 | image = XVECTOR (image)->contents[idx]; | |
6361 | } | |
6362 | ||
6363 | /* Ignore invalid image specifications. */ | |
6364 | if (!valid_image_p (image)) | |
6365 | continue; | |
6366 | ||
6367 | /* Display the toolbar button pressed, or depressed. */ | |
6368 | plist = Fcopy_sequence (XCDR (image)); | |
6369 | ||
6370 | /* Compute margin and relief to draw. */ | |
6371 | relief = toolbar_button_relief > 0 ? toolbar_button_relief : 3; | |
6372 | margin = relief + max (0, toolbar_button_margin); | |
6373 | ||
6374 | if (auto_raise_toolbar_buttons_p) | |
6375 | { | |
6376 | /* Add a `:relief' property to the image spec if the item is | |
6377 | selected. */ | |
6378 | if (selected_p) | |
6379 | { | |
6380 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
6381 | margin -= relief; | |
6382 | } | |
6383 | } | |
6384 | else | |
6385 | { | |
6386 | /* If image is selected, display it pressed, i.e. with a | |
6387 | negative relief. If it's not selected, display it with a | |
6388 | raised relief. */ | |
6389 | plist = Fplist_put (plist, QCrelief, | |
6390 | (selected_p | |
6391 | ? make_number (-relief) | |
6392 | : make_number (relief))); | |
6393 | margin -= relief; | |
6394 | } | |
6395 | ||
6396 | /* Put a margin around the image. */ | |
6397 | if (margin) | |
6398 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
6399 | ||
6400 | /* If button is not enabled, make the image appear disabled by | |
6401 | applying an appropriate algorithm to it. */ | |
6402 | if (!enabled_p) | |
6403 | plist = Fplist_put (plist, QCalgorithm, Qlaplace); | |
6404 | ||
6405 | /* Put a `display' text property on the string for the image to | |
6406 | display. Put a `menu-item' property on the string that gives | |
6407 | the start of this item's properties in the toolbar items | |
6408 | vector. */ | |
6409 | image = Fcons (Qimage, plist); | |
6410 | props = list4 (Qdisplay, image, | |
6411 | Qmenu_item, make_number (i * TOOLBAR_ITEM_NSLOTS)), | |
6412 | Fadd_text_properties (make_number (string_idx), | |
6413 | make_number (string_idx + 1), | |
6414 | props, f->desired_toolbar_string); | |
6415 | #undef PROP | |
a2889657 JB |
6416 | } |
6417 | ||
5f5c8ee5 GM |
6418 | UNGCPRO; |
6419 | } | |
6420 | ||
6421 | ||
6422 | /* Display one line of the toolbar of frame IT->f. */ | |
6423 | ||
6424 | static void | |
6425 | display_toolbar_line (it) | |
6426 | struct it *it; | |
6427 | { | |
6428 | struct glyph_row *row = it->glyph_row; | |
6429 | int max_x = it->last_visible_x; | |
6430 | struct glyph *last; | |
6431 | ||
6432 | prepare_desired_row (row); | |
6433 | row->y = it->current_y; | |
6434 | ||
6435 | while (it->current_x < max_x) | |
a2889657 | 6436 | { |
5f5c8ee5 | 6437 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 6438 | |
5f5c8ee5 GM |
6439 | /* Get the next display element. */ |
6440 | if (!get_next_display_element (it)) | |
6441 | break; | |
73af359d | 6442 | |
5f5c8ee5 GM |
6443 | /* Produce glyphs. */ |
6444 | x_before = it->current_x; | |
6445 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
6446 | PRODUCE_GLYPHS (it); | |
daa37602 | 6447 | |
5f5c8ee5 GM |
6448 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
6449 | i = 0; | |
6450 | x = x_before; | |
6451 | while (i < nglyphs) | |
6452 | { | |
6453 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
6454 | ||
6455 | if (x + glyph->pixel_width > max_x) | |
6456 | { | |
6457 | /* Glyph doesn't fit on line. */ | |
6458 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
6459 | it->current_x = x; | |
6460 | goto out; | |
6461 | } | |
daa37602 | 6462 | |
5f5c8ee5 GM |
6463 | ++it->hpos; |
6464 | x += glyph->pixel_width; | |
6465 | ++i; | |
6466 | } | |
6467 | ||
6468 | /* Stop at line ends. */ | |
6469 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6470 | break; | |
6471 | ||
6472 | set_iterator_to_next (it); | |
a2889657 | 6473 | } |
a2889657 | 6474 | |
5f5c8ee5 | 6475 | out:; |
a2889657 | 6476 | |
5f5c8ee5 GM |
6477 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
6478 | extend_face_to_end_of_line (it); | |
6479 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
6480 | last->right_box_line_p = 1; | |
6481 | compute_line_metrics (it); | |
6482 | ||
6483 | /* If line is empty, make it occupy the rest of the toolbar. */ | |
6484 | if (!row->displays_text_p) | |
6485 | { | |
312246d1 GM |
6486 | row->height = row->phys_height = it->last_visible_y - row->y; |
6487 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
6488 | } |
6489 | ||
6490 | row->full_width_p = 1; | |
6491 | row->continued_p = 0; | |
6492 | row->truncated_on_left_p = 0; | |
6493 | row->truncated_on_right_p = 0; | |
6494 | ||
6495 | it->current_x = it->hpos = 0; | |
6496 | it->current_y += row->height; | |
6497 | ++it->vpos; | |
6498 | ++it->glyph_row; | |
a2889657 | 6499 | } |
96a410bc | 6500 | |
5f5c8ee5 GM |
6501 | |
6502 | /* Value is the number of screen lines needed to make all toolbar | |
6503 | items of frame F visible. */ | |
96a410bc | 6504 | |
d39b6696 | 6505 | static int |
5f5c8ee5 GM |
6506 | toolbar_lines_needed (f) |
6507 | struct frame *f; | |
d39b6696 | 6508 | { |
5f5c8ee5 GM |
6509 | struct window *w = XWINDOW (f->toolbar_window); |
6510 | struct it it; | |
6511 | ||
6512 | /* Initialize an iterator for iteration over F->desired_toolbar_string | |
6513 | in the toolbar window of frame F. */ | |
6514 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOLBAR_FACE_ID); | |
6515 | it.first_visible_x = 0; | |
6516 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6517 | reseat_to_string (&it, NULL, f->desired_toolbar_string, 0, 0, 0, -1); | |
6518 | ||
6519 | while (!ITERATOR_AT_END_P (&it)) | |
6520 | { | |
6521 | it.glyph_row = w->desired_matrix->rows; | |
6522 | clear_glyph_row (it.glyph_row); | |
6523 | display_toolbar_line (&it); | |
6524 | } | |
6525 | ||
6526 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 6527 | } |
96a410bc | 6528 | |
5f5c8ee5 GM |
6529 | |
6530 | /* Display the toolbar of frame F. Value is non-zero if toolbar's | |
6531 | height should be changed. */ | |
6532 | ||
6533 | static int | |
6534 | redisplay_toolbar (f) | |
6535 | struct frame *f; | |
96a410bc | 6536 | { |
5f5c8ee5 GM |
6537 | struct window *w; |
6538 | struct it it; | |
6539 | struct glyph_row *row; | |
6540 | int change_height_p = 0; | |
6541 | ||
6542 | /* If frame hasn't a toolbar window or if it is zero-height, don't | |
6543 | do anything. This means you must start with toolbar-lines | |
6544 | non-zero to get the auto-sizing effect. Or in other words, you | |
6545 | can turn off toolbars by specifying toolbar-lines zero. */ | |
6546 | if (!WINDOWP (f->toolbar_window) | |
6547 | || (w = XWINDOW (f->toolbar_window), | |
6548 | XFASTINT (w->height) == 0)) | |
6549 | return 0; | |
96a410bc | 6550 | |
5f5c8ee5 GM |
6551 | /* Set up an iterator for the toolbar window. */ |
6552 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOLBAR_FACE_ID); | |
6553 | it.first_visible_x = 0; | |
6554 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6555 | row = it.glyph_row; | |
3450d04c | 6556 | |
5f5c8ee5 GM |
6557 | /* Build a string that represents the contents of the toolbar. */ |
6558 | build_desired_toolbar_string (f); | |
6559 | reseat_to_string (&it, NULL, f->desired_toolbar_string, 0, 0, 0, -1); | |
3450d04c | 6560 | |
5f5c8ee5 GM |
6561 | /* Display as many lines as needed to display all toolbar items. */ |
6562 | while (it.current_y < it.last_visible_y) | |
6563 | display_toolbar_line (&it); | |
3450d04c | 6564 | |
5f5c8ee5 GM |
6565 | /* It doesn't make much sense to try scrolling in the toolbar |
6566 | window, so don't do it. */ | |
6567 | w->desired_matrix->no_scrolling_p = 1; | |
6568 | w->must_be_updated_p = 1; | |
3450d04c | 6569 | |
5f5c8ee5 GM |
6570 | if (auto_resize_toolbars_p) |
6571 | { | |
6572 | int nlines; | |
6573 | ||
6574 | /* If there are blank lines at the end, except for a partially | |
6575 | visible blank line at the end that is smaller than | |
6576 | CANON_Y_UNIT, change the toolbar's height. */ | |
6577 | row = it.glyph_row - 1; | |
6578 | if (!row->displays_text_p | |
6579 | && row->height >= CANON_Y_UNIT (f)) | |
6580 | change_height_p = 1; | |
6581 | ||
6582 | /* If row displays toolbar items, but is partially visible, | |
6583 | change the toolbar's height. */ | |
6584 | if (row->displays_text_p | |
6585 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
6586 | change_height_p = 1; | |
6587 | ||
6588 | /* Resize windows as needed by changing the `toolbar-lines' | |
6589 | frame parameter. */ | |
6590 | if (change_height_p | |
6591 | && (nlines = toolbar_lines_needed (f), | |
6592 | nlines != XFASTINT (w->height))) | |
6593 | { | |
6594 | extern Lisp_Object Qtoolbar_lines; | |
6595 | Lisp_Object frame; | |
6596 | ||
6597 | XSETFRAME (frame, f); | |
6598 | clear_glyph_matrix (w->desired_matrix); | |
6599 | Fmodify_frame_parameters (frame, | |
6600 | Fcons (Fcons (Qtoolbar_lines, | |
6601 | make_number (nlines)), | |
6602 | Qnil)); | |
6603 | fonts_changed_p = 1; | |
6604 | } | |
6605 | } | |
3450d04c | 6606 | |
5f5c8ee5 | 6607 | return change_height_p; |
96a410bc | 6608 | } |
90adcf20 | 6609 | |
5f5c8ee5 GM |
6610 | |
6611 | /* Get information about the toolbar item which is displayed in GLYPH | |
6612 | on frame F. Return in *PROP_IDX the index where toolbar item | |
6613 | properties start in F->current_toolbar_items. Value is zero if | |
6614 | GLYPH doesn't display a toolbar item. */ | |
6615 | ||
6616 | int | |
6617 | toolbar_item_info (f, glyph, prop_idx) | |
6618 | struct frame *f; | |
6619 | struct glyph *glyph; | |
6620 | int *prop_idx; | |
90adcf20 | 6621 | { |
5f5c8ee5 GM |
6622 | Lisp_Object prop; |
6623 | int success_p; | |
6624 | ||
6625 | /* Get the text property `menu-item' at pos. The value of that | |
6626 | property is the start index of this item's properties in | |
6627 | F->current_toolbar_items. */ | |
6628 | prop = Fget_text_property (make_number (glyph->charpos), | |
6629 | Qmenu_item, f->current_toolbar_string); | |
6630 | if (INTEGERP (prop)) | |
6631 | { | |
6632 | *prop_idx = XINT (prop); | |
6633 | success_p = 1; | |
6634 | } | |
6635 | else | |
6636 | success_p = 0; | |
90adcf20 | 6637 | |
5f5c8ee5 GM |
6638 | return success_p; |
6639 | } | |
6640 | ||
6641 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 6642 | |
feb0c42f | 6643 | |
5f5c8ee5 GM |
6644 | \f |
6645 | /************************************************************************ | |
6646 | Horizontal scrolling | |
6647 | ************************************************************************/ | |
feb0c42f | 6648 | |
5f5c8ee5 GM |
6649 | static int hscroll_window_tree P_ ((Lisp_Object)); |
6650 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 6651 | |
5f5c8ee5 GM |
6652 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
6653 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
6654 | that it is not within a certain margin at the window's left and | |
6655 | right border. Value is non-zero if any window's hscroll has been | |
6656 | changed. */ | |
6657 | ||
6658 | static int | |
6659 | hscroll_window_tree (window) | |
6660 | Lisp_Object window; | |
6661 | { | |
6662 | int hscrolled_p = 0; | |
6663 | ||
6664 | while (WINDOWP (window)) | |
90adcf20 | 6665 | { |
5f5c8ee5 GM |
6666 | struct window *w = XWINDOW (window); |
6667 | ||
6668 | if (WINDOWP (w->hchild)) | |
6669 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
6670 | else if (WINDOWP (w->vchild)) | |
6671 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
6672 | else if (w->cursor.vpos >= 0) | |
6673 | { | |
6674 | int hscroll_margin, text_area_x, text_area_y; | |
6675 | int text_area_width, text_area_height; | |
6676 | struct glyph_row *cursor_row = MATRIX_ROW (w->current_matrix, | |
6677 | w->cursor.vpos); | |
a2725ab2 | 6678 | |
5f5c8ee5 GM |
6679 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
6680 | &text_area_width, &text_area_height); | |
90adcf20 | 6681 | |
5f5c8ee5 GM |
6682 | /* Scroll when cursor is inside this scroll margin. */ |
6683 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
6684 | ||
6685 | if ((XFASTINT (w->hscroll) | |
6686 | && w->cursor.x < hscroll_margin) | |
6687 | || (cursor_row->truncated_on_right_p | |
6688 | && (w->cursor.x > text_area_width - hscroll_margin))) | |
08b610e4 | 6689 | { |
5f5c8ee5 GM |
6690 | struct it it; |
6691 | int hscroll; | |
6692 | struct buffer *saved_current_buffer; | |
6693 | int pt; | |
6694 | ||
6695 | /* Find point in a display of infinite width. */ | |
6696 | saved_current_buffer = current_buffer; | |
6697 | current_buffer = XBUFFER (w->buffer); | |
6698 | ||
6699 | if (w == XWINDOW (selected_window)) | |
6700 | pt = BUF_PT (current_buffer); | |
6701 | else | |
08b610e4 | 6702 | { |
5f5c8ee5 GM |
6703 | pt = marker_position (w->pointm); |
6704 | pt = max (BEGV, pt); | |
6705 | pt = min (ZV, pt); | |
6706 | } | |
6707 | ||
6708 | /* Move iterator to pt starting at cursor_row->start in | |
6709 | a line with infinite width. */ | |
6710 | init_to_row_start (&it, w, cursor_row); | |
6711 | it.last_visible_x = INFINITY; | |
6712 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
6713 | current_buffer = saved_current_buffer; | |
6714 | ||
6715 | /* Center cursor in window. */ | |
6716 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
6717 | / CANON_X_UNIT (it.f)); | |
6718 | ||
6719 | /* Don't call Fset_window_hscroll if value hasn't | |
6720 | changed because it will prevent redisplay | |
6721 | optimizations. */ | |
6722 | if (XFASTINT (w->hscroll) != hscroll) | |
6723 | { | |
6724 | Fset_window_hscroll (window, make_number (hscroll)); | |
6725 | hscrolled_p = 1; | |
08b610e4 | 6726 | } |
08b610e4 | 6727 | } |
08b610e4 | 6728 | } |
a2725ab2 | 6729 | |
5f5c8ee5 | 6730 | window = w->next; |
90adcf20 | 6731 | } |
cd6dfed6 | 6732 | |
5f5c8ee5 GM |
6733 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
6734 | return hscrolled_p; | |
6735 | } | |
6736 | ||
6737 | ||
6738 | /* Set hscroll so that cursor is visible and not inside horizontal | |
6739 | scroll margins for all windows in the tree rooted at WINDOW. See | |
6740 | also hscroll_window_tree above. Value is non-zero if any window's | |
6741 | hscroll has been changed. If it has, desired matrices on the frame | |
6742 | of WINDOW are cleared. */ | |
6743 | ||
6744 | static int | |
6745 | hscroll_windows (window) | |
6746 | Lisp_Object window; | |
6747 | { | |
6748 | int hscrolled_p = hscroll_window_tree (window); | |
6749 | if (hscrolled_p) | |
6750 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
6751 | return hscrolled_p; | |
90adcf20 | 6752 | } |
5f5c8ee5 GM |
6753 | |
6754 | ||
90adcf20 | 6755 | \f |
5f5c8ee5 GM |
6756 | /************************************************************************ |
6757 | Redisplay | |
6758 | ************************************************************************/ | |
6759 | ||
6760 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
6761 | to a non-zero value. This is sometimes handy to have in a debugger | |
6762 | session. */ | |
6763 | ||
6764 | #if GLYPH_DEBUG | |
a2889657 | 6765 | |
5f5c8ee5 GM |
6766 | /* First and last unchanged row for try_window_id. */ |
6767 | ||
6768 | int debug_first_unchanged_at_end_vpos; | |
6769 | int debug_last_unchanged_at_beg_vpos; | |
6770 | ||
6771 | /* Delta vpos and y. */ | |
6772 | ||
6773 | int debug_dvpos, debug_dy; | |
6774 | ||
6775 | /* Delta in characters and bytes for try_window_id. */ | |
6776 | ||
6777 | int debug_delta, debug_delta_bytes; | |
6778 | ||
6779 | /* Values of window_end_pos and window_end_vpos at the end of | |
6780 | try_window_id. */ | |
6781 | ||
6782 | int debug_end_pos, debug_end_vpos; | |
6783 | ||
6784 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
6785 | format string. A1...A9 are a supplement for a variable-length | |
6786 | argument list. If trace_redisplay_p is non-zero also printf the | |
6787 | resulting string to stderr. */ | |
6788 | ||
6789 | static void | |
6790 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
6791 | struct window *w; | |
6792 | char *fmt; | |
6793 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
6794 | { | |
6795 | char buffer[512]; | |
6796 | char *method = w->desired_matrix->method; | |
6797 | int len = strlen (method); | |
6798 | int size = sizeof w->desired_matrix->method; | |
6799 | int remaining = size - len - 1; | |
6800 | ||
6801 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
6802 | if (len && remaining) | |
6803 | { | |
6804 | method[len] = '|'; | |
6805 | --remaining, ++len; | |
6806 | } | |
6807 | ||
6808 | strncpy (method + len, buffer, remaining); | |
6809 | ||
6810 | if (trace_redisplay_p) | |
6811 | fprintf (stderr, "%p (%s): %s\n", | |
6812 | w, | |
6813 | ((BUFFERP (w->buffer) | |
6814 | && STRINGP (XBUFFER (w->buffer)->name)) | |
6815 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
6816 | : "no buffer"), | |
6817 | buffer); | |
6818 | } | |
a2889657 | 6819 | |
5f5c8ee5 | 6820 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 6821 | |
a2889657 | 6822 | |
5f5c8ee5 GM |
6823 | /* This counter is used to clear the face cache every once in a while |
6824 | in redisplay_internal. It is incremented for each redisplay. | |
6825 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
6826 | cleared. */ | |
0d231165 | 6827 | |
5f5c8ee5 | 6828 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
6829 | static int clear_face_cache_count; |
6830 | ||
20de20dc | 6831 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
6832 | |
6833 | static struct frame *previous_terminal_frame; | |
6834 | ||
6835 | /* Non-zero while redisplay_internal is in progress. */ | |
6836 | ||
6837 | int redisplaying_p; | |
6838 | ||
6839 | ||
6840 | /* Value is non-zero if all changes in window W, which displays | |
6841 | current_buffer, are in the text between START and END. START is a | |
6842 | buffer position, END is given as a distance from Z. Used in | |
6843 | redisplay_internal for display optimization. */ | |
6844 | ||
6845 | static INLINE int | |
6846 | text_outside_line_unchanged_p (w, start, end) | |
6847 | struct window *w; | |
6848 | int start, end; | |
6849 | { | |
6850 | int unchanged_p = 1; | |
6851 | ||
6852 | /* If text or overlays have changed, see where. */ | |
6853 | if (XFASTINT (w->last_modified) < MODIFF | |
6854 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
6855 | { | |
6856 | /* Gap in the line? */ | |
6857 | if (GPT < start || Z - GPT < end) | |
6858 | unchanged_p = 0; | |
6859 | ||
6860 | /* Changes start in front of the line, or end after it? */ | |
6861 | if (unchanged_p | |
9142dd5b GM |
6862 | && (BEG_UNCHANGED < start - 1 |
6863 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
6864 | unchanged_p = 0; |
6865 | ||
6866 | /* If selective display, can't optimize if changes start at the | |
6867 | beginning of the line. */ | |
6868 | if (unchanged_p | |
6869 | && INTEGERP (current_buffer->selective_display) | |
6870 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 6871 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 GM |
6872 | unchanged_p = 0; |
6873 | } | |
6874 | ||
6875 | return unchanged_p; | |
6876 | } | |
6877 | ||
6878 | ||
6879 | /* Do a frame update, taking possible shortcuts into account. This is | |
6880 | the main external entry point for redisplay. | |
6881 | ||
6882 | If the last redisplay displayed an echo area message and that message | |
6883 | is no longer requested, we clear the echo area or bring back the | |
6884 | mini-buffer if that is in use. */ | |
20de20dc | 6885 | |
a2889657 JB |
6886 | void |
6887 | redisplay () | |
e9874cee RS |
6888 | { |
6889 | redisplay_internal (0); | |
6890 | } | |
6891 | ||
5f5c8ee5 | 6892 | |
9142dd5b GM |
6893 | /* Reconsider the setting of B->clip_changed which is displayed |
6894 | in window W. */ | |
6895 | ||
6896 | static INLINE void | |
6897 | reconsider_clip_changes (w, b) | |
6898 | struct window *w; | |
6899 | struct buffer *b; | |
6900 | { | |
6901 | if (b->prevent_redisplay_optimizations_p) | |
6902 | b->clip_changed = 1; | |
6903 | else if (b->clip_changed | |
6904 | && !NILP (w->window_end_valid) | |
6905 | && w->current_matrix->buffer == b | |
6906 | && w->current_matrix->zv == BUF_ZV (b) | |
6907 | && w->current_matrix->begv == BUF_BEGV (b)) | |
6908 | b->clip_changed = 0; | |
6909 | } | |
6910 | ||
6911 | ||
5f5c8ee5 GM |
6912 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
6913 | response to any user action; therefore, we should preserve the echo | |
6914 | area. (Actually, our caller does that job.) Perhaps in the future | |
6915 | avoid recentering windows if it is not necessary; currently that | |
6916 | causes some problems. */ | |
e9874cee RS |
6917 | |
6918 | static void | |
6919 | redisplay_internal (preserve_echo_area) | |
6920 | int preserve_echo_area; | |
a2889657 | 6921 | { |
5f5c8ee5 GM |
6922 | struct window *w = XWINDOW (selected_window); |
6923 | struct frame *f = XFRAME (w->frame); | |
6924 | int pause; | |
a2889657 | 6925 | int must_finish = 0; |
5f5c8ee5 | 6926 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 6927 | int number_of_visible_frames; |
28514cd9 | 6928 | int count; |
a2889657 | 6929 | |
5f5c8ee5 GM |
6930 | /* Non-zero means redisplay has to consider all windows on all |
6931 | frames. Zero means, only selected_window is considered. */ | |
6932 | int consider_all_windows_p; | |
6933 | ||
6934 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
6935 | ||
6936 | /* No redisplay if running in batch mode or frame is not yet fully | |
6937 | initialized, or redisplay is explicitly turned off by setting | |
6938 | Vinhibit_redisplay. */ | |
6939 | if (noninteractive | |
6940 | || !NILP (Vinhibit_redisplay) | |
6941 | || !f->glyphs_initialized_p) | |
a2889657 JB |
6942 | return; |
6943 | ||
5f5c8ee5 GM |
6944 | /* The flag redisplay_performed_directly_p is set by |
6945 | direct_output_for_insert when it already did the whole screen | |
6946 | update necessary. */ | |
6947 | if (redisplay_performed_directly_p) | |
6948 | { | |
6949 | redisplay_performed_directly_p = 0; | |
6950 | if (!hscroll_windows (selected_window)) | |
6951 | return; | |
6952 | } | |
6953 | ||
15f0cf78 RS |
6954 | #ifdef USE_X_TOOLKIT |
6955 | if (popup_activated ()) | |
6956 | return; | |
6957 | #endif | |
6958 | ||
28514cd9 | 6959 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 6960 | if (redisplaying_p) |
735c094c KH |
6961 | return; |
6962 | ||
28514cd9 GM |
6963 | /* Record a function that resets redisplaying_p to its old value |
6964 | when we leave this function. */ | |
6965 | count = specpdl_ptr - specpdl; | |
6966 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); | |
6967 | ++redisplaying_p; | |
6968 | ||
8b32d885 RS |
6969 | retry: |
6970 | ||
9142dd5b GM |
6971 | reconsider_clip_changes (w, current_buffer); |
6972 | ||
5f5c8ee5 GM |
6973 | /* If new fonts have been loaded that make a glyph matrix adjustment |
6974 | necessary, do it. */ | |
6975 | if (fonts_changed_p) | |
6976 | { | |
6977 | adjust_glyphs (NULL); | |
6978 | ++windows_or_buffers_changed; | |
6979 | fonts_changed_p = 0; | |
6980 | } | |
6981 | ||
fd8ff63d | 6982 | if (! FRAME_WINDOW_P (selected_frame) |
20de20dc RS |
6983 | && previous_terminal_frame != selected_frame) |
6984 | { | |
5f5c8ee5 GM |
6985 | /* Since frames on an ASCII terminal share the same display |
6986 | area, displaying a different frame means redisplay the whole | |
6987 | thing. */ | |
20de20dc RS |
6988 | windows_or_buffers_changed++; |
6989 | SET_FRAME_GARBAGED (selected_frame); | |
6990 | XSETFRAME (Vterminal_frame, selected_frame); | |
6991 | } | |
6992 | previous_terminal_frame = selected_frame; | |
20de20dc | 6993 | |
5f5c8ee5 GM |
6994 | /* Set the visible flags for all frames. Do this before checking |
6995 | for resized or garbaged frames; they want to know if their frames | |
6996 | are visible. See the comment in frame.h for | |
6997 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 6998 | { |
35f56f96 | 6999 | Lisp_Object tail, frame; |
d724d989 | 7000 | |
89819bdd RS |
7001 | number_of_visible_frames = 0; |
7002 | ||
35f56f96 | 7003 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 7004 | { |
5f5c8ee5 GM |
7005 | struct frame *f = XFRAME (frame); |
7006 | ||
7007 | FRAME_SAMPLE_VISIBILITY (f); | |
7008 | if (FRAME_VISIBLE_P (f)) | |
7009 | ++number_of_visible_frames; | |
7010 | clear_desired_matrices (f); | |
f82aff7c | 7011 | } |
d724d989 JB |
7012 | } |
7013 | ||
44fa5b1e | 7014 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 7015 | do_pending_window_change (1); |
a2889657 | 7016 | |
5f5c8ee5 | 7017 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 7018 | if (frame_garbaged) |
c6e89d6c | 7019 | clear_garbaged_frames (); |
a2889657 | 7020 | |
5f5c8ee5 | 7021 | /* Build menubar and toolbar items. */ |
f82aff7c RS |
7022 | prepare_menu_bars (); |
7023 | ||
28995e67 | 7024 | if (windows_or_buffers_changed) |
a2889657 JB |
7025 | update_mode_lines++; |
7026 | ||
538f13d4 RS |
7027 | /* Detect case that we need to write or remove a star in the mode line. */ |
7028 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
7029 | { |
7030 | w->update_mode_line = Qt; | |
7031 | if (buffer_shared > 1) | |
7032 | update_mode_lines++; | |
7033 | } | |
7034 | ||
5f5c8ee5 | 7035 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
7036 | if (!NILP (w->column_number_displayed) |
7037 | /* This alternative quickly identifies a common case | |
7038 | where no change is needed. */ | |
7039 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7040 | && XFASTINT (w->last_modified) >= MODIFF |
7041 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7042 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7043 | w->update_mode_line = Qt; | |
7044 | ||
44fa5b1e | 7045 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 7046 | |
5f5c8ee5 GM |
7047 | /* The variable buffer_shared is set in redisplay_window and |
7048 | indicates that we redisplay a buffer in different windows. See | |
7049 | there. */ | |
7050 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
7051 | |
7052 | /* If specs for an arrow have changed, do thorough redisplay | |
7053 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 7054 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 7055 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 7056 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 7057 | |
90adcf20 RS |
7058 | /* Normally the message* functions will have already displayed and |
7059 | updated the echo area, but the frame may have been trashed, or | |
7060 | the update may have been preempted, so display the echo area | |
c6e89d6c GM |
7061 | again here. Checking both message buffers captures the case that |
7062 | the echo area should be cleared. */ | |
7063 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
90adcf20 | 7064 | { |
c6e89d6c | 7065 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 7066 | must_finish = 1; |
dd2eb166 | 7067 | |
c6e89d6c GM |
7068 | if (fonts_changed_p) |
7069 | goto retry; | |
7070 | else if (window_height_changed_p) | |
7071 | { | |
7072 | consider_all_windows_p = 1; | |
7073 | ++update_mode_lines; | |
7074 | ++windows_or_buffers_changed; | |
9142dd5b GM |
7075 | |
7076 | /* If window configuration was changed, frames may have been | |
7077 | marked garbaged. Clear them or we will experience | |
7078 | surprises wrt scrolling. */ | |
7079 | if (frame_garbaged) | |
7080 | clear_garbaged_frames (); | |
c6e89d6c | 7081 | } |
90adcf20 | 7082 | } |
dd2eb166 GM |
7083 | else if (w == XWINDOW (minibuf_window) |
7084 | && (current_buffer->clip_changed | |
7085 | || XFASTINT (w->last_modified) < MODIFF | |
7086 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
7087 | && resize_mini_window (w)) | |
c6e89d6c GM |
7088 | { |
7089 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
7090 | showing if its contents might have changed. */ |
7091 | must_finish = 1; | |
7092 | consider_all_windows_p = 1; | |
c6e89d6c | 7093 | ++windows_or_buffers_changed; |
dd2eb166 | 7094 | ++update_mode_lines; |
9142dd5b GM |
7095 | |
7096 | /* If window configuration was changed, frames may have been | |
7097 | marked garbaged. Clear them or we will experience | |
7098 | surprises wrt scrolling. */ | |
7099 | if (frame_garbaged) | |
7100 | clear_garbaged_frames (); | |
c6e89d6c GM |
7101 | } |
7102 | ||
90adcf20 | 7103 | |
5f5c8ee5 GM |
7104 | /* If showing the region, and mark has changed, we must redisplay |
7105 | the whole window. The assignment to this_line_start_pos prevents | |
7106 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
7107 | if (((!NILP (Vtransient_mark_mode) |
7108 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7109 | != !NILP (w->region_showing)) | |
82d04750 JB |
7110 | || (!NILP (w->region_showing) |
7111 | && !EQ (w->region_showing, | |
7112 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
7113 | CHARPOS (this_line_start_pos) = 0; |
7114 | ||
7115 | /* Optimize the case that only the line containing the cursor in the | |
7116 | selected window has changed. Variables starting with this_ are | |
7117 | set in display_line and record information about the line | |
7118 | containing the cursor. */ | |
7119 | tlbufpos = this_line_start_pos; | |
7120 | tlendpos = this_line_end_pos; | |
7121 | if (!consider_all_windows_p | |
7122 | && CHARPOS (tlbufpos) > 0 | |
7123 | && NILP (w->update_mode_line) | |
73af359d | 7124 | && !current_buffer->clip_changed |
44fa5b1e | 7125 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 7126 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 7127 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
7128 | && this_line_buffer == current_buffer |
7129 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 7130 | && NILP (w->force_start) |
5f5c8ee5 GM |
7131 | /* Point must be on the line that we have info recorded about. */ |
7132 | && PT >= CHARPOS (tlbufpos) | |
7133 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
7134 | /* All text outside that line, including its final newline, |
7135 | must be unchanged */ | |
5f5c8ee5 GM |
7136 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
7137 | CHARPOS (tlendpos))) | |
7138 | { | |
7139 | if (CHARPOS (tlbufpos) > BEGV | |
7140 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
7141 | && (CHARPOS (tlbufpos) == ZV | |
7142 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
7143 | /* Former continuation line has disappeared by becoming empty */ |
7144 | goto cancel; | |
7145 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 7146 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
7147 | || MINI_WINDOW_P (w)) |
7148 | { | |
1c9241f5 KH |
7149 | /* We have to handle the case of continuation around a |
7150 | wide-column character (See the comment in indent.c around | |
7151 | line 885). | |
7152 | ||
7153 | For instance, in the following case: | |
7154 | ||
7155 | -------- Insert -------- | |
7156 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
7157 | J_I_ ==> J_I_ `^^' are cursors. | |
7158 | ^^ ^^ | |
7159 | -------- -------- | |
7160 | ||
7161 | As we have to redraw the line above, we should goto cancel. */ | |
7162 | ||
5f5c8ee5 GM |
7163 | struct it it; |
7164 | int line_height_before = this_line_pixel_height; | |
7165 | ||
7166 | /* Note that start_display will handle the case that the | |
7167 | line starting at tlbufpos is a continuation lines. */ | |
7168 | start_display (&it, w, tlbufpos); | |
7169 | ||
7170 | /* Implementation note: It this still necessary? */ | |
7171 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
7172 | goto cancel; |
7173 | ||
5f5c8ee5 GM |
7174 | TRACE ((stderr, "trying display optimization 1\n")); |
7175 | w->cursor.vpos = -1; | |
a2889657 | 7176 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
7177 | it.vpos = this_line_vpos; |
7178 | it.current_y = this_line_y; | |
7179 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
7180 | display_line (&it); | |
7181 | ||
a2889657 | 7182 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
7183 | and ends at same distance from eob as before, we win */ |
7184 | if (w->cursor.vpos >= 0 | |
7185 | /* Line is not continued, otherwise this_line_start_pos | |
7186 | would have been set to 0 in display_line. */ | |
7187 | && CHARPOS (this_line_start_pos) | |
7188 | /* Line ends as before. */ | |
7189 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
7190 | /* Line has same height as before. Otherwise other lines | |
7191 | would have to be shifted up or down. */ | |
7192 | && this_line_pixel_height == line_height_before) | |
a2889657 | 7193 | { |
5f5c8ee5 GM |
7194 | /* If this is not the window's last line, we must adjust |
7195 | the charstarts of the lines below. */ | |
7196 | if (it.current_y < it.last_visible_y) | |
7197 | { | |
7198 | struct glyph_row *row | |
7199 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
7200 | int delta, delta_bytes; | |
7201 | ||
7202 | if (Z - CHARPOS (tlendpos) == ZV) | |
7203 | { | |
7204 | /* This line ends at end of (accessible part of) | |
7205 | buffer. There is no newline to count. */ | |
7206 | delta = (Z | |
7207 | - CHARPOS (tlendpos) | |
7208 | - MATRIX_ROW_START_CHARPOS (row)); | |
7209 | delta_bytes = (Z_BYTE | |
7210 | - BYTEPOS (tlendpos) | |
7211 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7212 | } | |
7213 | else | |
7214 | { | |
7215 | /* This line ends in a newline. Must take | |
7216 | account of the newline and the rest of the | |
7217 | text that follows. */ | |
7218 | delta = (Z | |
7219 | - CHARPOS (tlendpos) | |
7220 | - MATRIX_ROW_START_CHARPOS (row)); | |
7221 | delta_bytes = (Z_BYTE | |
7222 | - BYTEPOS (tlendpos) | |
7223 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7224 | } | |
7225 | ||
7226 | increment_glyph_matrix_buffer_positions (w->current_matrix, | |
7227 | this_line_vpos + 1, | |
7228 | w->current_matrix->nrows, | |
7229 | delta, delta_bytes); | |
85bcef6c | 7230 | } |
46db8486 | 7231 | |
5f5c8ee5 GM |
7232 | /* If this row displays text now but previously didn't, |
7233 | or vice versa, w->window_end_vpos may have to be | |
7234 | adjusted. */ | |
7235 | if ((it.glyph_row - 1)->displays_text_p) | |
7236 | { | |
7237 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
7238 | XSETINT (w->window_end_vpos, this_line_vpos); | |
7239 | } | |
7240 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
7241 | && this_line_vpos > 0) | |
7242 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
7243 | w->window_end_valid = Qnil; | |
7244 | ||
7245 | /* Update hint: No need to try to scroll in update_window. */ | |
7246 | w->desired_matrix->no_scrolling_p = 1; | |
7247 | ||
7248 | #if GLYPH_DEBUG | |
7249 | *w->desired_matrix->method = 0; | |
7250 | debug_method_add (w, "optimization 1"); | |
7251 | #endif | |
a2889657 JB |
7252 | goto update; |
7253 | } | |
7254 | else | |
7255 | goto cancel; | |
7256 | } | |
5f5c8ee5 GM |
7257 | else if (/* Cursor position hasn't changed. */ |
7258 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
7259 | /* Make sure the cursor was last displayed |
7260 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
7261 | && 0 <= w->cursor.vpos |
7262 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
7263 | { |
7264 | if (!must_finish) | |
7265 | { | |
c6e89d6c | 7266 | do_pending_window_change (1); |
5f5c8ee5 GM |
7267 | |
7268 | /* We used to always goto end_of_redisplay here, but this | |
7269 | isn't enough if we have a blinking cursor. */ | |
7270 | if (w->cursor_off_p == w->last_cursor_off_p) | |
7271 | goto end_of_redisplay; | |
a2889657 JB |
7272 | } |
7273 | goto update; | |
7274 | } | |
8b51f1e3 KH |
7275 | /* If highlighting the region, or if the cursor is in the echo area, |
7276 | then we can't just move the cursor. */ | |
bd66d1ba RS |
7277 | else if (! (!NILP (Vtransient_mark_mode) |
7278 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
7279 | && (w == XWINDOW (current_buffer->last_selected_window) |
7280 | || highlight_nonselected_windows) | |
8b51f1e3 | 7281 | && NILP (w->region_showing) |
8f897821 | 7282 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 7283 | && !cursor_in_echo_area) |
a2889657 | 7284 | { |
5f5c8ee5 GM |
7285 | struct it it; |
7286 | struct glyph_row *row; | |
7287 | ||
7288 | /* Skip from tlbufpos to PT and see where it is. Note that | |
7289 | PT may be in invisible text. If so, we will end at the | |
7290 | next visible position. */ | |
7291 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
7292 | NULL, DEFAULT_FACE_ID); | |
7293 | it.current_x = this_line_start_x; | |
7294 | it.current_y = this_line_y; | |
7295 | it.vpos = this_line_vpos; | |
7296 | ||
7297 | /* The call to move_it_to stops in front of PT, but | |
7298 | moves over before-strings. */ | |
7299 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
7300 | ||
7301 | if (it.vpos == this_line_vpos | |
7302 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
7303 | row->enabled_p)) | |
a2889657 | 7304 | { |
5f5c8ee5 GM |
7305 | xassert (this_line_vpos == it.vpos); |
7306 | xassert (this_line_y == it.current_y); | |
7307 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
7308 | goto update; |
7309 | } | |
7310 | else | |
7311 | goto cancel; | |
7312 | } | |
5f5c8ee5 | 7313 | |
a2889657 | 7314 | cancel: |
5f5c8ee5 GM |
7315 | /* Text changed drastically or point moved off of line. */ |
7316 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
7317 | } |
7318 | ||
5f5c8ee5 GM |
7319 | CHARPOS (this_line_start_pos) = 0; |
7320 | consider_all_windows_p |= buffer_shared > 1; | |
7321 | ++clear_face_cache_count; | |
a2889657 | 7322 | |
5f5c8ee5 GM |
7323 | |
7324 | /* Build desired matrices. If consider_all_windows_p is non-zero, | |
7325 | do it for all windows on all frames. Otherwise do it for | |
7326 | selected_window, only. */ | |
463f6b91 | 7327 | |
5f5c8ee5 | 7328 | if (consider_all_windows_p) |
a2889657 | 7329 | { |
35f56f96 | 7330 | Lisp_Object tail, frame; |
a2889657 | 7331 | |
5f5c8ee5 GM |
7332 | /* Clear the face cache eventually. */ |
7333 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 7334 | { |
5f5c8ee5 | 7335 | clear_face_cache (0); |
463f6b91 RS |
7336 | clear_face_cache_count = 0; |
7337 | } | |
31b24551 | 7338 | |
5f5c8ee5 GM |
7339 | /* Recompute # windows showing selected buffer. This will be |
7340 | incremented each time such a window is displayed. */ | |
a2889657 JB |
7341 | buffer_shared = 0; |
7342 | ||
35f56f96 | 7343 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 7344 | { |
5f5c8ee5 | 7345 | struct frame *f = XFRAME (frame); |
fd8ff63d | 7346 | if (FRAME_WINDOW_P (f) || f == selected_frame) |
9769686d | 7347 | { |
5f5c8ee5 GM |
7348 | /* Mark all the scroll bars to be removed; we'll redeem |
7349 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
7350 | if (condemn_scroll_bars_hook) |
7351 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 7352 | |
f21ef775 | 7353 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 7354 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 7355 | |
5f5c8ee5 GM |
7356 | /* Any scroll bars which redisplay_windows should have |
7357 | nuked should now go away. */ | |
9769686d RS |
7358 | if (judge_scroll_bars_hook) |
7359 | (*judge_scroll_bars_hook) (f); | |
7360 | } | |
30c566e4 | 7361 | } |
a2889657 | 7362 | } |
5f5c8ee5 GM |
7363 | else if (FRAME_VISIBLE_P (selected_frame) |
7364 | && !FRAME_OBSCURED_P (selected_frame)) | |
7365 | redisplay_window (selected_window, 1); | |
7366 | ||
7367 | ||
7368 | /* Compare desired and current matrices, perform output. */ | |
7369 | ||
7370 | update: | |
7371 | ||
7372 | /* If fonts changed, display again. */ | |
7373 | if (fonts_changed_p) | |
7374 | goto retry; | |
a2889657 | 7375 | |
a2889657 JB |
7376 | /* Prevent various kinds of signals during display update. |
7377 | stdio is not robust about handling signals, | |
7378 | which can cause an apparent I/O error. */ | |
7379 | if (interrupt_input) | |
7380 | unrequest_sigio (); | |
7381 | stop_polling (); | |
7382 | ||
5f5c8ee5 | 7383 | if (consider_all_windows_p) |
a2889657 JB |
7384 | { |
7385 | Lisp_Object tail; | |
7386 | ||
7387 | pause = 0; | |
7388 | ||
44fa5b1e | 7389 | for (tail = Vframe_list; CONSP (tail); tail = XCONS (tail)->cdr) |
a2889657 | 7390 | { |
5f5c8ee5 | 7391 | struct frame *f; |
a2889657 | 7392 | |
e24c997d | 7393 | if (!FRAMEP (XCONS (tail)->car)) |
a2889657 JB |
7394 | continue; |
7395 | ||
44fa5b1e | 7396 | f = XFRAME (XCONS (tail)->car); |
1af9f229 | 7397 | |
fd8ff63d | 7398 | if ((FRAME_WINDOW_P (f) || f == selected_frame) |
f21ef775 | 7399 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 7400 | { |
5f5c8ee5 GM |
7401 | /* Mark all windows as to be updated. */ |
7402 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
44fa5b1e | 7403 | pause |= update_frame (f, 0, 0); |
a2889657 | 7404 | if (!pause) |
efc63ef0 | 7405 | { |
5f5c8ee5 GM |
7406 | if (hscroll_windows (f->root_window)) |
7407 | goto retry; | |
7408 | ||
efc63ef0 RS |
7409 | mark_window_display_accurate (f->root_window, 1); |
7410 | if (frame_up_to_date_hook != 0) | |
7411 | (*frame_up_to_date_hook) (f); | |
7412 | } | |
a2889657 JB |
7413 | } |
7414 | } | |
7415 | } | |
7416 | else | |
6e8290aa | 7417 | { |
5f5c8ee5 GM |
7418 | if (FRAME_VISIBLE_P (selected_frame) |
7419 | && !FRAME_OBSCURED_P (selected_frame)) | |
7420 | { | |
7421 | XWINDOW (selected_window)->must_be_updated_p = 1; | |
7422 | pause = update_frame (selected_frame, 0, 0); | |
7423 | if (!pause && hscroll_windows (selected_window)) | |
7424 | goto retry; | |
7425 | } | |
4d641a15 KH |
7426 | else |
7427 | pause = 0; | |
d724d989 | 7428 | |
8de2d90b | 7429 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
7430 | function. If the echo area is on another frame, that may |
7431 | have put text on a frame other than the selected one, so the | |
7432 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
7433 | it here. */ |
7434 | { | |
84faf44c | 7435 | Lisp_Object mini_window; |
5f5c8ee5 | 7436 | struct frame *mini_frame; |
84faf44c RS |
7437 | |
7438 | mini_window = FRAME_MINIBUF_WINDOW (selected_frame); | |
7439 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 7440 | |
fd8ff63d | 7441 | if (mini_frame != selected_frame && FRAME_WINDOW_P (mini_frame)) |
5f5c8ee5 GM |
7442 | { |
7443 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
7444 | pause |= update_frame (mini_frame, 0, 0); | |
7445 | if (!pause && hscroll_windows (mini_window)) | |
7446 | goto retry; | |
7447 | } | |
8de2d90b | 7448 | } |
6e8290aa | 7449 | } |
a2889657 | 7450 | |
5f5c8ee5 GM |
7451 | /* If display was paused because of pending input, make sure we do a |
7452 | thorough update the next time. */ | |
a2889657 JB |
7453 | if (pause) |
7454 | { | |
5f5c8ee5 GM |
7455 | /* Prevent the optimization at the beginning of |
7456 | redisplay_internal that tries a single-line update of the | |
7457 | line containing the cursor in the selected window. */ | |
7458 | CHARPOS (this_line_start_pos) = 0; | |
7459 | ||
7460 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 7461 | if (!NILP (last_arrow_position)) |
a2889657 JB |
7462 | { |
7463 | last_arrow_position = Qt; | |
7464 | last_arrow_string = Qt; | |
7465 | } | |
5f5c8ee5 GM |
7466 | |
7467 | /* If we pause after scrolling, some rows in the current | |
7468 | matrices of some windows are not valid. */ | |
7469 | if (!WINDOW_FULL_WIDTH_P (w) | |
7470 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
7471 | update_mode_lines = 1; |
7472 | } | |
7473 | ||
5f5c8ee5 GM |
7474 | /* Now text on frame agrees with windows, so put info into the |
7475 | windows for partial redisplay to follow. */ | |
a2889657 JB |
7476 | if (!pause) |
7477 | { | |
7478 | register struct buffer *b = XBUFFER (w->buffer); | |
7479 | ||
9142dd5b GM |
7480 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); |
7481 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
7482 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
7483 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
a2889657 | 7484 | |
5f5c8ee5 | 7485 | if (consider_all_windows_p) |
11e82b76 | 7486 | mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1); |
a2889657 JB |
7487 | else |
7488 | { | |
5f5c8ee5 GM |
7489 | XSETFASTINT (w->last_point, BUF_PT (b)); |
7490 | w->last_cursor = w->cursor; | |
7491 | w->last_cursor_off_p = w->cursor_off_p; | |
7492 | ||
28995e67 | 7493 | b->clip_changed = 0; |
9142dd5b | 7494 | b->prevent_redisplay_optimizations_p = 0; |
a2889657 | 7495 | w->update_mode_line = Qnil; |
c2213350 | 7496 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 7497 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
7498 | w->last_had_star |
7499 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7500 | ? Qt : Qnil); | |
3ee4159a RS |
7501 | |
7502 | /* Record if we are showing a region, so can make sure to | |
7503 | update it fully at next redisplay. */ | |
7504 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
7505 | && (w == XWINDOW (current_buffer->last_selected_window) |
7506 | || highlight_nonselected_windows) | |
3ee4159a RS |
7507 | && !NILP (XBUFFER (w->buffer)->mark_active) |
7508 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
7509 | : Qnil); | |
7510 | ||
d2f84654 | 7511 | w->window_end_valid = w->buffer; |
d45de95b | 7512 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 7513 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 RS |
7514 | if (frame_up_to_date_hook != 0) |
7515 | (*frame_up_to_date_hook) (selected_frame); | |
9142dd5b GM |
7516 | |
7517 | w->current_matrix->buffer = b; | |
7518 | w->current_matrix->begv = BUF_BEGV (b); | |
7519 | w->current_matrix->zv = BUF_ZV (b); | |
a2889657 | 7520 | } |
5f5c8ee5 | 7521 | |
a2889657 JB |
7522 | update_mode_lines = 0; |
7523 | windows_or_buffers_changed = 0; | |
7524 | } | |
7525 | ||
5f5c8ee5 GM |
7526 | /* Start SIGIO interrupts coming again. Having them off during the |
7527 | code above makes it less likely one will discard output, but not | |
7528 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 7529 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
7530 | if (interrupt_input) |
7531 | request_sigio (); | |
7532 | start_polling (); | |
7533 | ||
5f5c8ee5 GM |
7534 | /* If a frame has become visible which was not before, redisplay |
7535 | again, so that we display it. Expose events for such a frame | |
7536 | (which it gets when becoming visible) don't call the parts of | |
7537 | redisplay constructing glyphs, so simply exposing a frame won't | |
7538 | display anything in this case. So, we have to display these | |
7539 | frames here explicitly. */ | |
11c52c4f RS |
7540 | if (!pause) |
7541 | { | |
7542 | Lisp_Object tail, frame; | |
7543 | int new_count = 0; | |
7544 | ||
7545 | FOR_EACH_FRAME (tail, frame) | |
7546 | { | |
7547 | int this_is_visible = 0; | |
8e83f802 RS |
7548 | |
7549 | if (XFRAME (frame)->visible) | |
7550 | this_is_visible = 1; | |
7551 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
7552 | if (XFRAME (frame)->visible) | |
7553 | this_is_visible = 1; | |
11c52c4f RS |
7554 | |
7555 | if (this_is_visible) | |
7556 | new_count++; | |
7557 | } | |
7558 | ||
89819bdd | 7559 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
7560 | windows_or_buffers_changed++; |
7561 | } | |
7562 | ||
44fa5b1e | 7563 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 7564 | do_pending_window_change (1); |
d8e242fd | 7565 | |
8b32d885 RS |
7566 | /* If we just did a pending size change, or have additional |
7567 | visible frames, redisplay again. */ | |
3c8c72e0 | 7568 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 7569 | goto retry; |
5f5c8ee5 GM |
7570 | |
7571 | end_of_redisplay:; | |
c6e89d6c | 7572 | |
28514cd9 | 7573 | unbind_to (count, Qnil); |
a2889657 JB |
7574 | } |
7575 | ||
5f5c8ee5 GM |
7576 | |
7577 | /* Redisplay, but leave alone any recent echo area message unless | |
7578 | another message has been requested in its place. | |
a2889657 JB |
7579 | |
7580 | This is useful in situations where you need to redisplay but no | |
7581 | user action has occurred, making it inappropriate for the message | |
7582 | area to be cleared. See tracking_off and | |
7583 | wait_reading_process_input for examples of these situations. */ | |
7584 | ||
8991bb31 | 7585 | void |
a2889657 JB |
7586 | redisplay_preserve_echo_area () |
7587 | { | |
c6e89d6c | 7588 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 7589 | { |
c6e89d6c GM |
7590 | /* We have a previously displayed message, but no current |
7591 | message. Redisplay the previous message. */ | |
7592 | display_last_displayed_message_p = 1; | |
e9874cee | 7593 | redisplay_internal (1); |
c6e89d6c | 7594 | display_last_displayed_message_p = 0; |
a2889657 JB |
7595 | } |
7596 | else | |
e9874cee | 7597 | redisplay_internal (1); |
a2889657 JB |
7598 | } |
7599 | ||
5f5c8ee5 | 7600 | |
28514cd9 GM |
7601 | /* Function registered with record_unwind_protect in |
7602 | redisplay_internal. Clears the flag indicating that a redisplay is | |
7603 | in progress. */ | |
7604 | ||
7605 | static Lisp_Object | |
7606 | unwind_redisplay (old_redisplaying_p) | |
7607 | Lisp_Object old_redisplaying_p; | |
7608 | { | |
7609 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 7610 | return Qnil; |
28514cd9 GM |
7611 | } |
7612 | ||
7613 | ||
5f5c8ee5 GM |
7614 | /* Mark the display of windows in the window tree rooted at WINDOW as |
7615 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
7616 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
7617 | the next time redisplay_internal is called. */ | |
7618 | ||
a2889657 | 7619 | void |
5f5c8ee5 | 7620 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 7621 | Lisp_Object window; |
5f5c8ee5 | 7622 | int accurate_p; |
a2889657 | 7623 | { |
5f5c8ee5 GM |
7624 | struct window *w; |
7625 | ||
7626 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
7627 | { |
7628 | w = XWINDOW (window); | |
7629 | ||
5f5c8ee5 | 7630 | if (BUFFERP (w->buffer)) |
bd66d1ba | 7631 | { |
5f5c8ee5 GM |
7632 | struct buffer *b = XBUFFER (w->buffer); |
7633 | ||
c2213350 | 7634 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 7635 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 7636 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
7637 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
7638 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
7639 | ? Qt : Qnil); | |
bd66d1ba | 7640 | |
5f5c8ee5 GM |
7641 | #if 0 /* I don't think this is necessary because display_line does it. |
7642 | Let's check it. */ | |
bd66d1ba RS |
7643 | /* Record if we are showing a region, so can make sure to |
7644 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
7645 | w->region_showing |
7646 | = (!NILP (Vtransient_mark_mode) | |
7647 | && (w == XWINDOW (current_buffer->last_selected_window) | |
7648 | || highlight_nonselected_windows) | |
7649 | && (!NILP (b->mark_active) | |
7650 | ? Fmarker_position (b->mark) | |
7651 | : Qnil)); | |
7652 | #endif | |
7653 | ||
7654 | if (accurate_p) | |
7655 | { | |
7656 | b->clip_changed = 0; | |
9142dd5b GM |
7657 | b->prevent_redisplay_optimizations_p = 0; |
7658 | w->current_matrix->buffer = b; | |
7659 | w->current_matrix->begv = BUF_BEGV (b); | |
7660 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 GM |
7661 | w->last_cursor = w->cursor; |
7662 | w->last_cursor_off_p = w->cursor_off_p; | |
7663 | if (w == XWINDOW (selected_window)) | |
7664 | w->last_point = BUF_PT (b); | |
7665 | else | |
7666 | w->last_point = XMARKER (w->pointm)->charpos; | |
7667 | } | |
bd66d1ba RS |
7668 | } |
7669 | ||
d2f84654 | 7670 | w->window_end_valid = w->buffer; |
a2889657 JB |
7671 | w->update_mode_line = Qnil; |
7672 | ||
265a9e55 | 7673 | if (!NILP (w->vchild)) |
5f5c8ee5 | 7674 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 7675 | if (!NILP (w->hchild)) |
5f5c8ee5 | 7676 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
7677 | } |
7678 | ||
5f5c8ee5 | 7679 | if (accurate_p) |
a2889657 | 7680 | { |
d45de95b | 7681 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
7682 | last_arrow_string = Voverlay_arrow_string; |
7683 | } | |
7684 | else | |
7685 | { | |
5f5c8ee5 GM |
7686 | /* Force a thorough redisplay the next time by setting |
7687 | last_arrow_position and last_arrow_string to t, which is | |
7688 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
7689 | last_arrow_position = Qt; |
7690 | last_arrow_string = Qt; | |
7691 | } | |
7692 | } | |
5f5c8ee5 GM |
7693 | |
7694 | ||
7695 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
7696 | C. Since a display table doesn't have any parent, we don't have to | |
7697 | follow parent. Do not call this function directly but use the | |
7698 | macro DISP_CHAR_VECTOR. */ | |
7699 | ||
7700 | Lisp_Object | |
7701 | disp_char_vector (dp, c) | |
7702 | struct Lisp_Char_Table *dp; | |
7703 | int c; | |
7704 | { | |
7705 | int code[4], i; | |
7706 | Lisp_Object val; | |
7707 | ||
7708 | if (SINGLE_BYTE_CHAR_P (c)) | |
7709 | return (dp->contents[c]); | |
7710 | ||
7711 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
7712 | if (code[0] != CHARSET_COMPOSITION) | |
7713 | { | |
7714 | if (code[1] < 32) | |
7715 | code[1] = -1; | |
7716 | else if (code[2] < 32) | |
7717 | code[2] = -1; | |
7718 | } | |
7719 | ||
7720 | /* Here, the possible range of code[0] (== charset ID) is | |
7721 | 128..max_charset. Since the top level char table contains data | |
7722 | for multibyte characters after 256th element, we must increment | |
7723 | code[0] by 128 to get a correct index. */ | |
7724 | code[0] += 128; | |
7725 | code[3] = -1; /* anchor */ | |
7726 | ||
7727 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
7728 | { | |
7729 | val = dp->contents[code[i]]; | |
7730 | if (!SUB_CHAR_TABLE_P (val)) | |
7731 | return (NILP (val) ? dp->defalt : val); | |
7732 | } | |
7733 | ||
7734 | /* Here, val is a sub char table. We return the default value of | |
7735 | it. */ | |
7736 | return (dp->defalt); | |
7737 | } | |
7738 | ||
7739 | ||
a2889657 | 7740 | \f |
5f5c8ee5 GM |
7741 | /*********************************************************************** |
7742 | Window Redisplay | |
7743 | ***********************************************************************/ | |
a2725ab2 | 7744 | |
5f5c8ee5 | 7745 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
7746 | |
7747 | static void | |
5f5c8ee5 GM |
7748 | redisplay_windows (window) |
7749 | Lisp_Object window; | |
90adcf20 | 7750 | { |
5f5c8ee5 GM |
7751 | while (!NILP (window)) |
7752 | { | |
7753 | struct window *w = XWINDOW (window); | |
7754 | ||
7755 | if (!NILP (w->hchild)) | |
7756 | redisplay_windows (w->hchild); | |
7757 | else if (!NILP (w->vchild)) | |
7758 | redisplay_windows (w->vchild); | |
7759 | else | |
7760 | redisplay_window (window, 0); | |
a2725ab2 | 7761 | |
5f5c8ee5 GM |
7762 | window = w->next; |
7763 | } | |
7764 | } | |
7765 | ||
7766 | ||
7767 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
7768 | DELTA is the number of bytes by which positions recorded in ROW | |
7769 | differ from current buffer positions. */ | |
7770 | ||
7771 | void | |
7772 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
7773 | struct window *w; | |
7774 | struct glyph_row *row; | |
7775 | struct glyph_matrix *matrix; | |
7776 | int delta, delta_bytes, dy, dvpos; | |
7777 | { | |
7778 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
7779 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
7780 | int x = row->x; | |
7781 | int pt_old = PT - delta; | |
7782 | ||
7783 | /* Skip over glyphs not having an object at the start of the row. | |
7784 | These are special glyphs like truncation marks on terminal | |
7785 | frames. */ | |
7786 | if (row->displays_text_p) | |
7787 | while (glyph < end | |
7788 | && !glyph->object | |
7789 | && glyph->charpos < 0) | |
7790 | { | |
7791 | x += glyph->pixel_width; | |
7792 | ++glyph; | |
7793 | } | |
7794 | ||
7795 | while (glyph < end | |
7796 | && glyph->object | |
7797 | && (!BUFFERP (glyph->object) | |
7798 | || glyph->charpos < pt_old)) | |
7799 | { | |
7800 | x += glyph->pixel_width; | |
7801 | ++glyph; | |
7802 | } | |
7803 | ||
7804 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
7805 | w->cursor.x = x; | |
7806 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
7807 | w->cursor.y = row->y + dy; | |
7808 | ||
7809 | if (w == XWINDOW (selected_window)) | |
7810 | { | |
7811 | if (!row->continued_p | |
7812 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
7813 | && row->x == 0) | |
7814 | { | |
7815 | this_line_buffer = XBUFFER (w->buffer); | |
7816 | ||
7817 | CHARPOS (this_line_start_pos) | |
7818 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
7819 | BYTEPOS (this_line_start_pos) | |
7820 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
7821 | ||
7822 | CHARPOS (this_line_end_pos) | |
7823 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
7824 | BYTEPOS (this_line_end_pos) | |
7825 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
7826 | ||
7827 | this_line_y = w->cursor.y; | |
7828 | this_line_pixel_height = row->height; | |
7829 | this_line_vpos = w->cursor.vpos; | |
7830 | this_line_start_x = row->x; | |
7831 | } | |
7832 | else | |
7833 | CHARPOS (this_line_start_pos) = 0; | |
7834 | } | |
7835 | } | |
7836 | ||
7837 | ||
7838 | /* Run window scroll functions, if any, for WINDOW with new window | |
7839 | start STARTP. Sets the window start of WINDOW to that position. */ | |
7840 | ||
7841 | static INLINE struct text_pos | |
7842 | run_window_scroll_functions (window, startp) | |
7843 | Lisp_Object window; | |
7844 | struct text_pos startp; | |
7845 | { | |
7846 | struct window *w = XWINDOW (window); | |
7847 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
90adcf20 | 7848 | |
5f5c8ee5 GM |
7849 | if (!NILP (Vwindow_scroll_functions)) |
7850 | { | |
7851 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
7852 | make_number (CHARPOS (startp))); | |
7853 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
7854 | } | |
90adcf20 | 7855 | |
5f5c8ee5 GM |
7856 | return startp; |
7857 | } | |
7858 | ||
7859 | ||
7860 | /* Modify the desired matrix of window W and W->vscroll so that the | |
7861 | line containing the cursor is fully visible. */ | |
7862 | ||
7863 | static void | |
7864 | make_cursor_line_fully_visible (w) | |
7865 | struct window *w; | |
7866 | { | |
7867 | struct glyph_matrix *matrix; | |
7868 | struct glyph_row *row; | |
7869 | int top_line_height; | |
7870 | ||
7871 | /* It's not always possible to find the cursor, e.g, when a window | |
7872 | is full of overlay strings. Don't do anything in that case. */ | |
7873 | if (w->cursor.vpos < 0) | |
7874 | return; | |
7875 | ||
7876 | matrix = w->desired_matrix; | |
7877 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
7878 | ||
7879 | /* If row->y == top y of window display area, the window isn't tall | |
7880 | enough to display a single line. There is nothing we can do | |
7881 | about it. */ | |
7882 | top_line_height = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
7883 | if (row->y == top_line_height) | |
7884 | return; | |
7885 | ||
7886 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
7887 | { | |
7888 | int dy = row->height - row->visible_height; | |
7889 | w->vscroll = 0; | |
7890 | w->cursor.y += dy; | |
7891 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7892 | } | |
7893 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) | |
7894 | { | |
7895 | int dy = - (row->height - row->visible_height); | |
7896 | w->vscroll = dy; | |
7897 | w->cursor.y += dy; | |
7898 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7899 | } | |
7900 | ||
7901 | /* When we change the cursor y-position of the selected window, | |
7902 | change this_line_y as well so that the display optimization for | |
7903 | the cursor line of the selected window in redisplay_internal uses | |
7904 | the correct y-position. */ | |
7905 | if (w == XWINDOW (selected_window)) | |
7906 | this_line_y = w->cursor.y; | |
7907 | } | |
7908 | ||
7909 | ||
7910 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
7911 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
7912 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
7913 | in redisplay_window to bring a partially visible line into view in | |
7914 | the case that only the cursor has moved. | |
7915 | ||
7916 | Value is | |
7917 | ||
7918 | 1 if scrolling succeeded | |
7919 | ||
7920 | 0 if scrolling didn't find point. | |
7921 | ||
7922 | -1 if new fonts have been loaded so that we must interrupt | |
7923 | redisplay, adjust glyph matrices, and try again. */ | |
7924 | ||
7925 | static int | |
7926 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
7927 | scroll_step, temp_scroll_step) | |
7928 | Lisp_Object window; | |
7929 | int just_this_one_p; | |
7930 | int scroll_conservatively, scroll_step; | |
7931 | int temp_scroll_step; | |
7932 | { | |
7933 | struct window *w = XWINDOW (window); | |
7934 | struct frame *f = XFRAME (w->frame); | |
7935 | struct text_pos scroll_margin_pos; | |
7936 | struct text_pos pos; | |
7937 | struct text_pos startp; | |
7938 | struct it it; | |
7939 | Lisp_Object window_end; | |
7940 | int this_scroll_margin; | |
7941 | int dy = 0; | |
7942 | int scroll_max; | |
7943 | int line_height, rc; | |
7944 | int amount_to_scroll = 0; | |
7945 | Lisp_Object aggressive; | |
7946 | int height; | |
7947 | ||
7948 | #if GLYPH_DEBUG | |
7949 | debug_method_add (w, "try_scrolling"); | |
78614721 | 7950 | #endif |
5f5c8ee5 GM |
7951 | |
7952 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
7953 | ||
7954 | /* Compute scroll margin height in pixels. We scroll when point is | |
7955 | within this distance from the top or bottom of the window. */ | |
7956 | if (scroll_margin > 0) | |
90adcf20 | 7957 | { |
5f5c8ee5 GM |
7958 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
7959 | this_scroll_margin *= CANON_Y_UNIT (f); | |
7960 | } | |
7961 | else | |
7962 | this_scroll_margin = 0; | |
7963 | ||
7964 | /* Compute how much we should try to scroll maximally to bring point | |
7965 | into view. */ | |
7966 | if (scroll_step) | |
7967 | scroll_max = scroll_step; | |
7968 | else if (scroll_conservatively) | |
7969 | scroll_max = scroll_conservatively; | |
7970 | else if (temp_scroll_step) | |
7971 | scroll_max = temp_scroll_step; | |
7972 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
7973 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
7974 | /* We're trying to scroll because of aggressive scrolling | |
7975 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
7976 | there should be a variable for this. */ | |
7977 | scroll_max = 10; | |
7978 | else | |
7979 | scroll_max = 0; | |
7980 | scroll_max *= CANON_Y_UNIT (f); | |
7981 | ||
7982 | /* Decide whether we have to scroll down. Start at the window end | |
7983 | and move this_scroll_margin up to find the position of the scroll | |
7984 | margin. */ | |
7985 | window_end = Fwindow_end (window, Qt); | |
7986 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
7987 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
7988 | if (this_scroll_margin) | |
7989 | { | |
7990 | start_display (&it, w, scroll_margin_pos); | |
7991 | move_it_vertically (&it, - this_scroll_margin); | |
7992 | scroll_margin_pos = it.current.pos; | |
7993 | } | |
7994 | ||
7995 | if (PT >= CHARPOS (scroll_margin_pos)) | |
7996 | { | |
7997 | int y0; | |
7998 | ||
7999 | /* Point is in the scroll margin at the bottom of the window, or | |
8000 | below. Compute a new window start that makes point visible. */ | |
8001 | ||
8002 | /* Compute the distance from the scroll margin to PT. | |
8003 | Give up if the distance is greater than scroll_max. */ | |
8004 | start_display (&it, w, scroll_margin_pos); | |
8005 | y0 = it.current_y; | |
8006 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8007 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8008 | line_height = (it.max_ascent + it.max_descent | |
8009 | ? it.max_ascent + it.max_descent | |
8010 | : last_height); | |
8011 | dy = it.current_y + line_height - y0; | |
8012 | if (dy > scroll_max) | |
8013 | return 0; | |
8014 | ||
8015 | /* Move the window start down. If scrolling conservatively, | |
8016 | move it just enough down to make point visible. If | |
8017 | scroll_step is set, move it down by scroll_step. */ | |
8018 | start_display (&it, w, startp); | |
8019 | ||
8020 | if (scroll_conservatively) | |
8021 | amount_to_scroll = dy; | |
8022 | else if (scroll_step || temp_scroll_step) | |
8023 | amount_to_scroll = scroll_max; | |
8024 | else | |
90adcf20 | 8025 | { |
5f5c8ee5 GM |
8026 | aggressive = current_buffer->scroll_down_aggressively; |
8027 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
8028 | - WINDOW_DISPLAY_TOP_LINE_HEIGHT (w)); | |
8029 | if (NUMBERP (aggressive)) | |
8030 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8031 | } | |
a2725ab2 | 8032 | |
5f5c8ee5 GM |
8033 | if (amount_to_scroll <= 0) |
8034 | return 0; | |
a2725ab2 | 8035 | |
5f5c8ee5 GM |
8036 | move_it_vertically (&it, amount_to_scroll); |
8037 | startp = it.current.pos; | |
8038 | } | |
8039 | else | |
8040 | { | |
8041 | /* See if point is inside the scroll margin at the top of the | |
8042 | window. */ | |
8043 | scroll_margin_pos = startp; | |
8044 | if (this_scroll_margin) | |
8045 | { | |
8046 | start_display (&it, w, startp); | |
8047 | move_it_vertically (&it, this_scroll_margin); | |
8048 | scroll_margin_pos = it.current.pos; | |
8049 | } | |
8050 | ||
8051 | if (PT < CHARPOS (scroll_margin_pos)) | |
8052 | { | |
8053 | /* Point is in the scroll margin at the top of the window or | |
8054 | above what is displayed in the window. */ | |
8055 | int y0; | |
8056 | ||
8057 | /* Compute the vertical distance from PT to the scroll | |
8058 | margin position. Give up if distance is greater than | |
8059 | scroll_max. */ | |
8060 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
8061 | start_display (&it, w, pos); | |
8062 | y0 = it.current_y; | |
8063 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
8064 | it.last_visible_y, -1, | |
8065 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8066 | dy = it.current_y - y0; | |
8067 | if (dy > scroll_max) | |
8068 | return 0; | |
8069 | ||
8070 | /* Compute new window start. */ | |
8071 | start_display (&it, w, startp); | |
8072 | ||
8073 | if (scroll_conservatively) | |
8074 | amount_to_scroll = dy; | |
8075 | else if (scroll_step || temp_scroll_step) | |
8076 | amount_to_scroll = scroll_max; | |
538f13d4 | 8077 | else |
5f5c8ee5 GM |
8078 | { |
8079 | aggressive = current_buffer->scroll_up_aggressively; | |
8080 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
8081 | - WINDOW_DISPLAY_TOP_LINE_HEIGHT (w)); | |
8082 | if (NUMBERP (aggressive)) | |
8083 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8084 | } | |
a2725ab2 | 8085 | |
5f5c8ee5 GM |
8086 | if (amount_to_scroll <= 0) |
8087 | return 0; | |
8088 | ||
8089 | move_it_vertically (&it, - amount_to_scroll); | |
8090 | startp = it.current.pos; | |
90adcf20 RS |
8091 | } |
8092 | } | |
a2889657 | 8093 | |
5f5c8ee5 GM |
8094 | /* Run window scroll functions. */ |
8095 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 8096 | |
5f5c8ee5 GM |
8097 | /* Display the window. Give up if new fonts are loaded, or if point |
8098 | doesn't appear. */ | |
8099 | if (!try_window (window, startp)) | |
8100 | rc = -1; | |
8101 | else if (w->cursor.vpos < 0) | |
8102 | { | |
8103 | clear_glyph_matrix (w->desired_matrix); | |
8104 | rc = 0; | |
8105 | } | |
8106 | else | |
8107 | { | |
8108 | /* Maybe forget recorded base line for line number display. */ | |
8109 | if (!just_this_one_p | |
8110 | || current_buffer->clip_changed | |
9142dd5b | 8111 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
8112 | w->base_line_number = Qnil; |
8113 | ||
8114 | /* If cursor ends up on a partially visible line, shift display | |
8115 | lines up or down. */ | |
8116 | make_cursor_line_fully_visible (w); | |
8117 | rc = 1; | |
8118 | } | |
8119 | ||
8120 | return rc; | |
a2889657 JB |
8121 | } |
8122 | ||
5f5c8ee5 GM |
8123 | |
8124 | /* Compute a suitable window start for window W if display of W starts | |
8125 | on a continuation line. Value is non-zero if a new window start | |
8126 | was computed. | |
8127 | ||
8128 | The new window start will be computed, based on W's width, starting | |
8129 | from the start of the continued line. It is the start of the | |
8130 | screen line with the minimum distance from the old start W->start. */ | |
8131 | ||
8132 | static int | |
8133 | compute_window_start_on_continuation_line (w) | |
8134 | struct window *w; | |
1f1ff51d | 8135 | { |
5f5c8ee5 GM |
8136 | struct text_pos pos, start_pos; |
8137 | int window_start_changed_p = 0; | |
1f1ff51d | 8138 | |
5f5c8ee5 | 8139 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 8140 | |
5f5c8ee5 GM |
8141 | /* If window start is on a continuation line... Window start may be |
8142 | < BEGV in case there's invisible text at the start of the | |
8143 | buffer (M-x rmail, for example). */ | |
8144 | if (CHARPOS (start_pos) > BEGV | |
8145 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 8146 | { |
5f5c8ee5 GM |
8147 | struct it it; |
8148 | struct glyph_row *row; | |
8149 | ||
8150 | /* Find the start of the continued line. This should be fast | |
8151 | because scan_buffer is fast (newline cache). */ | |
8152 | row = w->desired_matrix->rows + (WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0); | |
8153 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), | |
8154 | row, DEFAULT_FACE_ID); | |
8155 | reseat_at_previous_visible_line_start (&it); | |
8156 | ||
8157 | /* If the line start is "too far" away from the window start, | |
8158 | say it takes too much time to compute a new window start. */ | |
8159 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
8160 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
8161 | { | |
8162 | int min_distance, distance; | |
8163 | ||
8164 | /* Move forward by display lines to find the new window | |
8165 | start. If window width was enlarged, the new start can | |
8166 | be expected to be > the old start. If window width was | |
8167 | decreased, the new window start will be < the old start. | |
8168 | So, we're looking for the display line start with the | |
8169 | minimum distance from the old window start. */ | |
8170 | pos = it.current.pos; | |
8171 | min_distance = INFINITY; | |
8172 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
8173 | distance < min_distance) | |
8174 | { | |
8175 | min_distance = distance; | |
8176 | pos = it.current.pos; | |
8177 | move_it_by_lines (&it, 1, 0); | |
8178 | } | |
8179 | ||
8180 | /* Set the window start there. */ | |
8181 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
8182 | window_start_changed_p = 1; | |
8183 | } | |
1f1ff51d | 8184 | } |
5f5c8ee5 GM |
8185 | |
8186 | return window_start_changed_p; | |
1f1ff51d KH |
8187 | } |
8188 | ||
5f5c8ee5 GM |
8189 | |
8190 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only | |
8191 | selected_window is redisplayed. */ | |
90adcf20 | 8192 | |
a2889657 | 8193 | static void |
5f5c8ee5 | 8194 | redisplay_window (window, just_this_one_p) |
a2889657 | 8195 | Lisp_Object window; |
5f5c8ee5 | 8196 | int just_this_one_p; |
a2889657 | 8197 | { |
5f5c8ee5 GM |
8198 | struct window *w = XWINDOW (window); |
8199 | struct frame *f = XFRAME (w->frame); | |
8200 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 8201 | struct buffer *old = current_buffer; |
5f5c8ee5 | 8202 | struct text_pos lpoint, opoint, startp; |
e481f960 | 8203 | int update_mode_line; |
5f5c8ee5 GM |
8204 | int tem; |
8205 | struct it it; | |
8206 | /* Record it now because it's overwritten. */ | |
8207 | int current_matrix_up_to_date_p = 0; | |
5ba50c51 | 8208 | int really_switched_buffer = 0; |
5f5c8ee5 | 8209 | int temp_scroll_step = 0; |
2e54982e | 8210 | int count = specpdl_ptr - specpdl; |
a2889657 | 8211 | |
5f5c8ee5 GM |
8212 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
8213 | opoint = lpoint; | |
a2889657 | 8214 | |
5f5c8ee5 GM |
8215 | /* W must be a leaf window here. */ |
8216 | xassert (!NILP (w->buffer)); | |
8217 | #if GLYPH_DEBUG | |
8218 | *w->desired_matrix->method = 0; | |
8219 | #endif | |
2e54982e RS |
8220 | |
8221 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
8222 | |
8223 | reconsider_clip_changes (w, buffer); | |
8224 | ||
5f5c8ee5 GM |
8225 | /* Has the mode line to be updated? */ |
8226 | update_mode_line = (!NILP (w->update_mode_line) | |
8227 | || update_mode_lines | |
8228 | || buffer->clip_changed); | |
8de2d90b JB |
8229 | |
8230 | if (MINI_WINDOW_P (w)) | |
8231 | { | |
5f5c8ee5 | 8232 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 8233 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
8234 | { |
8235 | if (update_mode_line) | |
8236 | /* We may have to update a tty frame's menu bar or a | |
8237 | toolbar. Example `M-x C-h C-h C-g'. */ | |
8238 | goto finish_menu_bars; | |
8239 | else | |
8240 | /* We've already displayed the echo area glyphs in this window. */ | |
8241 | goto finish_scroll_bars; | |
8242 | } | |
73af359d | 8243 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 8244 | { |
5f5c8ee5 GM |
8245 | /* W is a mini-buffer window, but it's not the currently |
8246 | active one, so clear it. */ | |
8247 | int yb = window_text_bottom_y (w); | |
8248 | struct glyph_row *row; | |
8249 | int y; | |
8250 | ||
8251 | for (y = 0, row = w->desired_matrix->rows; | |
8252 | y < yb; | |
8253 | y += row->height, ++row) | |
8254 | blank_row (w, row, y); | |
88f22aff | 8255 | goto finish_scroll_bars; |
8de2d90b JB |
8256 | } |
8257 | } | |
a2889657 | 8258 | |
5f5c8ee5 GM |
8259 | /* Otherwise set up data on this window; select its buffer and point |
8260 | value. */ | |
e481f960 | 8261 | if (update_mode_line) |
5ba50c51 | 8262 | { |
5f5c8ee5 GM |
8263 | /* Really select the buffer, for the sake of buffer-local |
8264 | variables. */ | |
5ba50c51 RS |
8265 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
8266 | really_switched_buffer = 1; | |
8267 | } | |
e481f960 RS |
8268 | else |
8269 | set_buffer_temp (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
8270 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
8271 | ||
8272 | current_matrix_up_to_date_p | |
8273 | = (!NILP (w->window_end_valid) | |
8274 | && !current_buffer->clip_changed | |
8275 | && XFASTINT (w->last_modified) >= MODIFF | |
8276 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 8277 | |
5f5c8ee5 GM |
8278 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
8279 | the window end being valid, so set it to nil there. */ | |
8280 | if (windows_or_buffers_changed) | |
8281 | { | |
8282 | /* If window starts on a continuation line, maybe adjust the | |
8283 | window start in case the window's width changed. */ | |
8284 | if (XMARKER (w->start)->buffer == current_buffer) | |
8285 | compute_window_start_on_continuation_line (w); | |
8286 | ||
8287 | w->window_end_valid = Qnil; | |
8288 | } | |
12adba34 | 8289 | |
5f5c8ee5 GM |
8290 | /* Some sanity checks. */ |
8291 | CHECK_WINDOW_END (w); | |
8292 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 8293 | abort (); |
5f5c8ee5 | 8294 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 8295 | abort (); |
a2889657 | 8296 | |
28995e67 RS |
8297 | /* If %c is in mode line, update it if needed. */ |
8298 | if (!NILP (w->column_number_displayed) | |
8299 | /* This alternative quickly identifies a common case | |
8300 | where no change is needed. */ | |
8301 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8302 | && XFASTINT (w->last_modified) >= MODIFF |
8303 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8304 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8305 | update_mode_line = 1; | |
8306 | ||
5f5c8ee5 GM |
8307 | /* Count number of windows showing the selected buffer. An indirect |
8308 | buffer counts as its base buffer. */ | |
8309 | if (!just_this_one_p) | |
42640f83 RS |
8310 | { |
8311 | struct buffer *current_base, *window_base; | |
8312 | current_base = current_buffer; | |
8313 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
8314 | if (current_base->base_buffer) | |
8315 | current_base = current_base->base_buffer; | |
8316 | if (window_base->base_buffer) | |
8317 | window_base = window_base->base_buffer; | |
8318 | if (current_base == window_base) | |
8319 | buffer_shared++; | |
8320 | } | |
a2889657 | 8321 | |
5f5c8ee5 GM |
8322 | /* Point refers normally to the selected window. For any other |
8323 | window, set up appropriate value. */ | |
a2889657 JB |
8324 | if (!EQ (window, selected_window)) |
8325 | { | |
12adba34 RS |
8326 | int new_pt = XMARKER (w->pointm)->charpos; |
8327 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 8328 | if (new_pt < BEGV) |
a2889657 | 8329 | { |
f67a0f51 | 8330 | new_pt = BEGV; |
12adba34 RS |
8331 | new_pt_byte = BEGV_BYTE; |
8332 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 8333 | } |
f67a0f51 | 8334 | else if (new_pt > (ZV - 1)) |
a2889657 | 8335 | { |
f67a0f51 | 8336 | new_pt = ZV; |
12adba34 RS |
8337 | new_pt_byte = ZV_BYTE; |
8338 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 8339 | } |
5f5c8ee5 | 8340 | |
f67a0f51 | 8341 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 8342 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
8343 | } |
8344 | ||
f4faa47c | 8345 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
8346 | have changed, invalidate the width run cache. It's true that |
8347 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
8348 | redisplay goes (non-fatally) haywire when the display table is |
8349 | changed, so why should we worry about doing any better? */ | |
8350 | if (current_buffer->width_run_cache) | |
8351 | { | |
f908610f | 8352 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
8353 | |
8354 | if (! disptab_matches_widthtab (disptab, | |
8355 | XVECTOR (current_buffer->width_table))) | |
8356 | { | |
8357 | invalidate_region_cache (current_buffer, | |
8358 | current_buffer->width_run_cache, | |
8359 | BEG, Z); | |
8360 | recompute_width_table (current_buffer, disptab); | |
8361 | } | |
8362 | } | |
8363 | ||
a2889657 | 8364 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
8365 | if (XMARKER (w->start)->buffer != current_buffer) |
8366 | goto recenter; | |
8367 | ||
5f5c8ee5 | 8368 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 8369 | |
cf0df6ab RS |
8370 | /* If someone specified a new starting point but did not insist, |
8371 | check whether it can be used. */ | |
5f5c8ee5 | 8372 | if (!NILP (w->optional_new_start)) |
cf0df6ab RS |
8373 | { |
8374 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
8375 | /* This takes a mini-buffer prompt into account. */ |
8376 | start_display (&it, w, startp); | |
8377 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8378 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8379 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
8380 | w->force_start = Qt; |
8381 | } | |
8382 | ||
8de2d90b | 8383 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 8384 | unless the specified location is outside the accessible range. */ |
265a9e55 | 8385 | if (!NILP (w->force_start)) |
a2889657 | 8386 | { |
e63574d7 | 8387 | w->force_start = Qnil; |
5f5c8ee5 | 8388 | w->vscroll = 0; |
b5174a51 | 8389 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
8390 | |
8391 | /* Forget any recorded base line for line number display. */ | |
8392 | if (!current_matrix_up_to_date_p | |
8393 | || current_buffer->clip_changed) | |
8394 | w->base_line_number = Qnil; | |
8395 | ||
75c43375 RS |
8396 | /* Redisplay the mode line. Select the buffer properly for that. |
8397 | Also, run the hook window-scroll-functions | |
8398 | because we have scrolled. */ | |
e63574d7 RS |
8399 | /* Note, we do this after clearing force_start because |
8400 | if there's an error, it is better to forget about force_start | |
8401 | than to get into an infinite loop calling the hook functions | |
8402 | and having them get more errors. */ | |
75c43375 RS |
8403 | if (!update_mode_line |
8404 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 8405 | { |
5ba50c51 RS |
8406 | if (!really_switched_buffer) |
8407 | { | |
8408 | set_buffer_temp (old); | |
8409 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8410 | really_switched_buffer = 1; |
5ba50c51 | 8411 | } |
5f5c8ee5 | 8412 | |
e481f960 RS |
8413 | update_mode_line = 1; |
8414 | w->update_mode_line = Qt; | |
5f5c8ee5 | 8415 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 8416 | } |
5f5c8ee5 | 8417 | |
c2213350 | 8418 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8419 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
8420 | if (CHARPOS (startp) < BEGV) |
8421 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
8422 | else if (CHARPOS (startp) > ZV) | |
8423 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
8424 | ||
8425 | /* Redisplay, then check if cursor has been set during the | |
8426 | redisplay. Give up if new fonts were loaded. */ | |
8427 | if (!try_window (window, startp)) | |
8428 | { | |
8429 | w->force_start = Qt; | |
8430 | clear_glyph_matrix (w->desired_matrix); | |
8431 | goto restore_buffers; | |
8432 | } | |
8433 | ||
8434 | if (w->cursor.vpos < 0) | |
8435 | { | |
8436 | /* If point does not appear, or on a line that is not fully | |
8437 | visible, move point so it does appear. The desired | |
8438 | matrix has been built above, so we can use it. */ | |
8439 | int height = window_box_height (w) / 2; | |
8440 | struct glyph_row *row = MATRIX_ROW (w->desired_matrix, 0); | |
8441 | ||
8442 | while (row->y < height) | |
8443 | ++row; | |
8444 | ||
8445 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
8446 | MATRIX_ROW_START_BYTEPOS (row)); | |
8447 | ||
90adcf20 | 8448 | if (w != XWINDOW (selected_window)) |
12adba34 | 8449 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
8450 | else if (current_buffer == old) |
8451 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
8452 | ||
8453 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
8454 | ||
8455 | /* If we are highlighting the region, then we just changed | |
8456 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
8457 | if (!NILP (Vtransient_mark_mode) |
8458 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 8459 | { |
5f5c8ee5 GM |
8460 | clear_glyph_matrix (w->desired_matrix); |
8461 | if (!try_window (window, startp)) | |
8462 | goto restore_buffers; | |
6f27fa9b | 8463 | } |
a2889657 | 8464 | } |
5f5c8ee5 GM |
8465 | |
8466 | make_cursor_line_fully_visible (w); | |
8467 | #if GLYPH_DEBUG | |
8468 | debug_method_add (w, "forced window start"); | |
8469 | #endif | |
a2889657 JB |
8470 | goto done; |
8471 | } | |
8472 | ||
5f5c8ee5 GM |
8473 | /* Handle case where text has not changed, only point, and it has |
8474 | not moved off the frame. */ | |
8475 | if (current_matrix_up_to_date_p | |
8476 | /* Point may be in this window. */ | |
8477 | && PT >= CHARPOS (startp) | |
8478 | /* If we don't check this, we are called to move the cursor in a | |
8479 | horizontally split window with a current matrix that doesn't | |
8480 | fit the display. */ | |
8481 | && !windows_or_buffers_changed | |
8482 | /* Selective display hasn't changed. */ | |
8483 | && !current_buffer->clip_changed | |
b1aa6cb3 RS |
8484 | /* If force-mode-line-update was called, really redisplay; |
8485 | that's how redisplay is forced after e.g. changing | |
8486 | buffer-invisibility-spec. */ | |
632ab665 | 8487 | && NILP (w->update_mode_line) |
5f5c8ee5 GM |
8488 | /* Can't use this case if highlighting a region. When a |
8489 | region exists, cursor movement has to do more than just | |
8490 | set the cursor. */ | |
8491 | && !(!NILP (Vtransient_mark_mode) | |
8492 | && !NILP (current_buffer->mark_active)) | |
bd66d1ba | 8493 | && NILP (w->region_showing) |
8f897821 | 8494 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
8495 | /* Right after splitting windows, last_point may be nil. */ |
8496 | && INTEGERP (w->last_point) | |
8497 | /* This code is not used for mini-buffer for the sake of the case | |
8498 | of redisplaying to replace an echo area message; since in | |
8499 | that case the mini-buffer contents per se are usually | |
8500 | unchanged. This code is of no real use in the mini-buffer | |
8501 | since the handling of this_line_start_pos, etc., in redisplay | |
8502 | handles the same cases. */ | |
d45de95b | 8503 | && !EQ (window, minibuf_window) |
5f5c8ee5 GM |
8504 | /* When splitting windows or for new windows, it happens that |
8505 | redisplay is called with a nil window_end_vpos or one being | |
8506 | larger than the window. This should really be fixed in | |
8507 | window.c. I don't have this on my list, now, so we do | |
8508 | approximately the same as the old redisplay code. --gerd. */ | |
8509 | && INTEGERP (w->window_end_vpos) | |
8510 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
8511 | && (FRAME_WINDOW_P (f) | |
8512 | || !MARKERP (Voverlay_arrow_position) | |
377dbd97 | 8513 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) |
a2889657 | 8514 | { |
5f5c8ee5 GM |
8515 | int this_scroll_margin; |
8516 | struct glyph_row *row; | |
8517 | int scroll_p; | |
a2889657 | 8518 | |
5f5c8ee5 GM |
8519 | #if GLYPH_DEBUG |
8520 | debug_method_add (w, "cursor movement"); | |
8521 | #endif | |
9afd2168 | 8522 | |
5f5c8ee5 GM |
8523 | /* Scroll if point within this distance from the top or bottom |
8524 | of the window. This is a pixel value. */ | |
8525 | this_scroll_margin = max (0, scroll_margin); | |
8526 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
8527 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8528 | ||
8529 | /* Start with the row the cursor was displayed during the last | |
8530 | not paused redisplay. Give up if that row is not valid. */ | |
8531 | if (w->last_cursor.vpos >= w->current_matrix->nrows) | |
8532 | goto try_to_scroll; | |
8533 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
8534 | if (row->mode_line_p) | |
8535 | ++row; | |
8536 | if (!row->enabled_p) | |
8537 | goto try_to_scroll; | |
8538 | ||
8539 | scroll_p = 0; | |
8540 | if (PT > XFASTINT (w->last_point)) | |
8541 | { | |
8542 | /* Point has moved forward. */ | |
8543 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
8544 | ||
8545 | while ((MATRIX_ROW_END_CHARPOS (row) < PT | |
8546 | /* The end position of a row equals the start | |
8547 | position of the next row. If PT is there, we | |
8548 | would rather display it in the next line, except | |
8549 | when this line ends in ZV. */ | |
8550 | || (MATRIX_ROW_END_CHARPOS (row) == PT | |
8551 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
8552 | || !row->ends_at_zv_p))) | |
8553 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
8554 | { | |
8555 | xassert (row->enabled_p); | |
8556 | ++row; | |
8557 | } | |
9afd2168 | 8558 | |
5f5c8ee5 GM |
8559 | /* If within the scroll margin, scroll. Note that |
8560 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which the | |
8561 | next line would be drawn, and that this_scroll_margin can | |
8562 | be zero. */ | |
8563 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
8564 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
8565 | /* Line is completely visible last line in window and PT | |
8566 | is to be set in the next line. */ | |
8567 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
8568 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
8569 | && !row->ends_at_zv_p | |
8570 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
8571 | scroll_p = 1; | |
8572 | } | |
8573 | else if (PT < XFASTINT (w->last_point)) | |
a2889657 | 8574 | { |
5f5c8ee5 GM |
8575 | /* Cursor has to be moved backward. Note that PT >= |
8576 | CHARPOS (startp) because of the outer if-statement. */ | |
8577 | while (!row->mode_line_p | |
8578 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
8579 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
8580 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
8581 | && (row->y > this_scroll_margin | |
8582 | || CHARPOS (startp) == BEGV)) | |
a2889657 | 8583 | { |
5f5c8ee5 GM |
8584 | xassert (row->enabled_p); |
8585 | --row; | |
a2889657 | 8586 | } |
abb4c08f | 8587 | |
5f5c8ee5 GM |
8588 | /* Consider the following case: Window starts at BEGV, there |
8589 | is invisible, intangible text at BEGV, so that display | |
8590 | starts at some point START > BEGV. It can happen that | |
8591 | we are called with PT somewhere between BEGV and START. | |
8592 | Try to handle that case. */ | |
8593 | if (row < w->current_matrix->rows | |
8594 | || row->mode_line_p) | |
8595 | { | |
8596 | row = w->current_matrix->rows; | |
8597 | if (row->mode_line_p) | |
8598 | ++row; | |
8599 | } | |
8600 | ||
8601 | /* Due to newlines in overlay strings, we may have to skip | |
8602 | forward over overlay strings. */ | |
8603 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
8604 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
8605 | && !row->ends_at_zv_p) | |
8606 | ++row; | |
8607 | ||
8608 | /* If within the scroll margin, scroll. */ | |
8609 | if (row->y < this_scroll_margin | |
8610 | && CHARPOS (startp) != BEGV) | |
8611 | scroll_p = 1; | |
8612 | } | |
8613 | ||
8614 | /* if PT is not in the glyph row, give up. */ | |
8615 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8616 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8617 | goto try_to_scroll; | |
8618 | ||
8619 | /* If we end up in a partially visible line, let's make it fully | |
8620 | visible. This can be done most easily by using the existing | |
8621 | scrolling code. */ | |
8622 | if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8623 | { | |
8624 | temp_scroll_step = 1; | |
8625 | goto try_to_scroll; | |
a2889657 | 8626 | } |
5f5c8ee5 GM |
8627 | else if (scroll_p) |
8628 | goto try_to_scroll; | |
8629 | ||
8630 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8631 | goto done; | |
a2889657 | 8632 | } |
5f5c8ee5 | 8633 | |
a2889657 JB |
8634 | /* If current starting point was originally the beginning of a line |
8635 | but no longer is, find a new starting point. */ | |
265a9e55 | 8636 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
8637 | && !(CHARPOS (startp) <= BEGV |
8638 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 8639 | { |
5f5c8ee5 GM |
8640 | #if GLYPH_DEBUG |
8641 | debug_method_add (w, "recenter 1"); | |
8642 | #endif | |
a2889657 JB |
8643 | goto recenter; |
8644 | } | |
5f5c8ee5 GM |
8645 | |
8646 | /* Try scrolling with try_window_id. */ | |
9142dd5b GM |
8647 | else if (/* Windows and buffers haven't changed. */ |
8648 | !windows_or_buffers_changed | |
5f5c8ee5 GM |
8649 | /* Window must be either use window-based redisplay or |
8650 | be full width. */ | |
8651 | && (FRAME_WINDOW_P (f) | |
c59c668a | 8652 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))) |
5f5c8ee5 GM |
8653 | && !MINI_WINDOW_P (w) |
8654 | /* Point is not known NOT to appear in window. */ | |
8655 | && PT >= CHARPOS (startp) | |
a2889657 | 8656 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
8657 | /* Window is not hscrolled. */ |
8658 | && XFASTINT (w->hscroll) == 0 | |
8659 | /* Selective display has not changed. */ | |
8660 | && !current_buffer->clip_changed | |
8661 | /* Current matrix is up to date. */ | |
8662 | && !NILP (w->window_end_valid) | |
8663 | /* Can't use this case if highlighting a region because | |
8664 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
8665 | && !(!NILP (Vtransient_mark_mode) |
8666 | && !NILP (current_buffer->mark_active)) | |
8667 | && NILP (w->region_showing) | |
8f897821 | 8668 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 | 8669 | /* Overlay arrow position and string not changed. */ |
d45de95b | 8670 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 8671 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
8672 | /* Value is > 0 if update has been done, it is -1 if we |
8673 | know that the same window start will not work. It is 0 | |
8674 | if unsuccessful for some other reason. */ | |
8675 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 8676 | { |
5f5c8ee5 GM |
8677 | #if GLYPH_DEBUG |
8678 | debug_method_add (w, "try_window_id"); | |
8679 | #endif | |
8680 | ||
8681 | if (fonts_changed_p) | |
8682 | goto restore_buffers; | |
a2889657 JB |
8683 | if (tem > 0) |
8684 | goto done; | |
5f5c8ee5 GM |
8685 | /* Otherwise try_window_id has returned -1 which means that we |
8686 | don't want the alternative below this comment to execute. */ | |
a2889657 | 8687 | } |
5f5c8ee5 GM |
8688 | else if (CHARPOS (startp) >= BEGV |
8689 | && CHARPOS (startp) <= ZV | |
8690 | && PT >= CHARPOS (startp) | |
8691 | && (CHARPOS (startp) < ZV | |
e9874cee | 8692 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 8693 | || CHARPOS (startp) == BEGV |
8850a573 RS |
8694 | || (XFASTINT (w->last_modified) >= MODIFF |
8695 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 8696 | { |
5f5c8ee5 GM |
8697 | #if GLYPH_DEBUG |
8698 | debug_method_add (w, "same window start"); | |
8699 | #endif | |
8700 | ||
8701 | /* Try to redisplay starting at same place as before. | |
8702 | If point has not moved off frame, accept the results. */ | |
8703 | if (!current_matrix_up_to_date_p | |
8704 | /* Don't use try_window_reusing_current_matrix in this case | |
8705 | because it can have changed the buffer. */ | |
8706 | || !NILP (Vwindow_scroll_functions) | |
8707 | || MINI_WINDOW_P (w) | |
8708 | || !try_window_reusing_current_matrix (w)) | |
8709 | { | |
8710 | IF_DEBUG (debug_method_add (w, "1")); | |
8711 | try_window (window, startp); | |
8712 | } | |
8713 | ||
8714 | if (fonts_changed_p) | |
8715 | goto restore_buffers; | |
8716 | ||
8717 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 8718 | { |
5f5c8ee5 GM |
8719 | if (!just_this_one_p |
8720 | || current_buffer->clip_changed | |
9142dd5b | 8721 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
8722 | /* Forget any recorded base line for line number display. */ |
8723 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
8724 | |
8725 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
8726 | goto done; |
8727 | } | |
a2889657 | 8728 | else |
5f5c8ee5 | 8729 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
8730 | } |
8731 | ||
5f5c8ee5 GM |
8732 | try_to_scroll: |
8733 | ||
c2213350 | 8734 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8735 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 8736 | |
e481f960 RS |
8737 | /* Redisplay the mode line. Select the buffer properly for that. */ |
8738 | if (!update_mode_line) | |
8739 | { | |
5ba50c51 RS |
8740 | if (!really_switched_buffer) |
8741 | { | |
8742 | set_buffer_temp (old); | |
8743 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8744 | really_switched_buffer = 1; |
5ba50c51 | 8745 | } |
e481f960 RS |
8746 | update_mode_line = 1; |
8747 | w->update_mode_line = Qt; | |
8748 | } | |
a2889657 | 8749 | |
5f5c8ee5 GM |
8750 | /* Try to scroll by specified few lines. */ |
8751 | if ((scroll_conservatively | |
8752 | || scroll_step | |
8753 | || temp_scroll_step | |
8754 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
8755 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 8756 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
8757 | && CHARPOS (startp) >= BEGV |
8758 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 8759 | { |
5f5c8ee5 GM |
8760 | /* The function returns -1 if new fonts were loaded, 1 if |
8761 | successful, 0 if not successful. */ | |
8762 | int rc = try_scrolling (window, just_this_one_p, | |
8763 | scroll_conservatively, | |
8764 | scroll_step, | |
8765 | temp_scroll_step); | |
8766 | if (rc > 0) | |
8767 | goto done; | |
8768 | else if (rc < 0) | |
8769 | goto restore_buffers; | |
8770 | } | |
f9c8af06 | 8771 | |
5f5c8ee5 | 8772 | /* Finally, just choose place to start which centers point */ |
5936754e | 8773 | |
5f5c8ee5 | 8774 | recenter: |
44173109 | 8775 | |
5f5c8ee5 GM |
8776 | #if GLYPH_DEBUG |
8777 | debug_method_add (w, "recenter"); | |
8778 | #endif | |
0789adb2 | 8779 | |
5f5c8ee5 | 8780 | /* w->vscroll = 0; */ |
0789adb2 | 8781 | |
5f5c8ee5 GM |
8782 | /* Forget any previously recorded base line for line number display. */ |
8783 | if (!current_matrix_up_to_date_p | |
8784 | || current_buffer->clip_changed) | |
8785 | w->base_line_number = Qnil; | |
8786 | ||
8787 | /* Move backward half the height of the window. */ | |
8788 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8789 | it.current_y = it.last_visible_y; | |
8790 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
8791 | xassert (IT_CHARPOS (it) >= BEGV); | |
8792 | ||
8793 | /* The function move_it_vertically_backward may move over more | |
8794 | than the specified y-distance. If it->w is small, e.g. a | |
8795 | mini-buffer window, we may end up in front of the window's | |
8796 | display area. Start displaying at the start of the line | |
8797 | containing PT in this case. */ | |
8798 | if (it.current_y <= 0) | |
8799 | { | |
8800 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8801 | move_it_vertically (&it, 0); | |
8802 | xassert (IT_CHARPOS (it) <= PT); | |
8803 | it.current_y = 0; | |
0789adb2 RS |
8804 | } |
8805 | ||
5f5c8ee5 GM |
8806 | it.current_x = it.hpos = 0; |
8807 | ||
8808 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
8809 | in case the window-scroll-functions functions get errors. */ | |
8810 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
8811 | ||
8812 | /* Run scroll hooks. */ | |
8813 | startp = run_window_scroll_functions (window, it.current.pos); | |
8814 | ||
8815 | /* Redisplay the window. */ | |
8816 | if (!current_matrix_up_to_date_p | |
8817 | || windows_or_buffers_changed | |
8818 | /* Don't use try_window_reusing_current_matrix in this case | |
8819 | because it can have changed the buffer. */ | |
8820 | || !NILP (Vwindow_scroll_functions) | |
8821 | || !just_this_one_p | |
8822 | || MINI_WINDOW_P (w) | |
8823 | || !try_window_reusing_current_matrix (w)) | |
8824 | try_window (window, startp); | |
8825 | ||
8826 | /* If new fonts have been loaded (due to fontsets), give up. We | |
8827 | have to start a new redisplay since we need to re-adjust glyph | |
8828 | matrices. */ | |
8829 | if (fonts_changed_p) | |
8830 | goto restore_buffers; | |
8831 | ||
8832 | /* If cursor did not appear assume that the middle of the window is | |
8833 | in the first line of the window. Do it again with the next line. | |
8834 | (Imagine a window of height 100, displaying two lines of height | |
8835 | 60. Moving back 50 from it->last_visible_y will end in the first | |
8836 | line.) */ | |
8837 | if (w->cursor.vpos < 0) | |
a2889657 | 8838 | { |
5f5c8ee5 GM |
8839 | if (!NILP (w->window_end_valid) |
8840 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 8841 | { |
5f5c8ee5 GM |
8842 | clear_glyph_matrix (w->desired_matrix); |
8843 | move_it_by_lines (&it, 1, 0); | |
8844 | try_window (window, it.current.pos); | |
a2889657 | 8845 | } |
5f5c8ee5 | 8846 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 8847 | { |
5f5c8ee5 GM |
8848 | clear_glyph_matrix (w->desired_matrix); |
8849 | move_it_by_lines (&it, -1, 0); | |
8850 | try_window (window, it.current.pos); | |
8851 | } | |
8852 | else | |
8853 | { | |
8854 | /* Not much we can do about it. */ | |
a2889657 | 8855 | } |
a2889657 | 8856 | } |
010494d0 | 8857 | |
5f5c8ee5 GM |
8858 | /* Consider the following case: Window starts at BEGV, there is |
8859 | invisible, intangible text at BEGV, so that display starts at | |
8860 | some point START > BEGV. It can happen that we are called with | |
8861 | PT somewhere between BEGV and START. Try to handle that case. */ | |
8862 | if (w->cursor.vpos < 0) | |
835766b6 | 8863 | { |
5f5c8ee5 GM |
8864 | struct glyph_row *row = w->current_matrix->rows; |
8865 | if (row->mode_line_p) | |
8866 | ++row; | |
8867 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 8868 | } |
5f5c8ee5 GM |
8869 | |
8870 | make_cursor_line_fully_visible (w); | |
b5174a51 | 8871 | |
5f5c8ee5 GM |
8872 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
8873 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
8874 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
8875 | ? Qt : Qnil); | |
a2889657 | 8876 | |
5f5c8ee5 | 8877 | done: |
a2889657 | 8878 | |
5f5c8ee5 | 8879 | /* Display the mode line, if we must. */ |
e481f960 | 8880 | if ((update_mode_line |
aa6d10fa | 8881 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
8882 | if (a) the window to its side is being redone and |
8883 | (b) we do a frame-based redisplay. This is a consequence | |
8884 | of how inverted lines are drawn in frame-based redisplay. */ | |
8885 | || (!just_this_one_p | |
8886 | && !FRAME_WINDOW_P (f) | |
8887 | && !WINDOW_FULL_WIDTH_P (w)) | |
8888 | /* Line number to display. */ | |
155ef550 | 8889 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 8890 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
8891 | || (!NILP (w->column_number_displayed) |
8892 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
8893 | /* This means that the window has a mode line. */ |
8894 | && (WINDOW_WANTS_MODELINE_P (w) | |
8895 | || WINDOW_WANTS_TOP_LINE_P (w))) | |
5ba50c51 | 8896 | { |
5f5c8ee5 GM |
8897 | display_mode_lines (w); |
8898 | ||
8899 | /* If mode line height has changed, arrange for a thorough | |
8900 | immediate redisplay using the correct mode line height. */ | |
8901 | if (WINDOW_WANTS_MODELINE_P (w) | |
8902 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 8903 | { |
5f5c8ee5 GM |
8904 | fonts_changed_p = 1; |
8905 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
8906 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 8907 | } |
5f5c8ee5 GM |
8908 | |
8909 | /* If top line height has changed, arrange for a thorough | |
8910 | immediate redisplay using the correct mode line height. */ | |
8911 | if (WINDOW_WANTS_TOP_LINE_P (w) | |
8912 | && CURRENT_TOP_LINE_HEIGHT (w) != DESIRED_TOP_LINE_HEIGHT (w)) | |
8913 | { | |
8914 | fonts_changed_p = 1; | |
8915 | MATRIX_TOP_LINE_ROW (w->current_matrix)->height | |
8916 | = DESIRED_TOP_LINE_HEIGHT (w); | |
8917 | } | |
8918 | ||
8919 | if (fonts_changed_p) | |
8920 | goto restore_buffers; | |
5ba50c51 | 8921 | } |
5f5c8ee5 GM |
8922 | |
8923 | if (!line_number_displayed | |
8924 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
8925 | { |
8926 | w->base_line_pos = Qnil; | |
8927 | w->base_line_number = Qnil; | |
8928 | } | |
a2889657 | 8929 | |
5f5c8ee5 GM |
8930 | finish_menu_bars: |
8931 | ||
7ce2c095 | 8932 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 8933 | if (update_mode_line |
5f5c8ee5 GM |
8934 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
8935 | { | |
8936 | int redisplay_menu_p = 0; | |
8937 | ||
8938 | if (FRAME_WINDOW_P (f)) | |
8939 | { | |
dc937613 | 8940 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 8941 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 8942 | #else |
5f5c8ee5 | 8943 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 8944 | #endif |
5f5c8ee5 GM |
8945 | } |
8946 | else | |
8947 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
8948 | ||
8949 | if (redisplay_menu_p) | |
8950 | display_menu_bar (w); | |
8951 | ||
8952 | #ifdef HAVE_WINDOW_SYSTEM | |
8953 | if (WINDOWP (f->toolbar_window) | |
8954 | && (FRAME_TOOLBAR_LINES (f) > 0 | |
8955 | || auto_resize_toolbars_p)) | |
8956 | redisplay_toolbar (f); | |
8957 | #endif | |
8958 | } | |
7ce2c095 | 8959 | |
88f22aff | 8960 | finish_scroll_bars: |
5f5c8ee5 | 8961 | |
88f22aff | 8962 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 8963 | { |
b1d1124b | 8964 | int start, end, whole; |
30c566e4 | 8965 | |
b1d1124b | 8966 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
8967 | At some point, it would be nice to choose between scrollbars |
8968 | which reflect the whole buffer size, with special markers | |
8969 | indicating narrowing, and scrollbars which reflect only the | |
8970 | visible region. | |
8971 | ||
5f5c8ee5 | 8972 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 8973 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 8974 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 8975 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 8976 | { |
8a9311d7 | 8977 | whole = ZV - BEGV; |
4d641a15 | 8978 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
8979 | /* I don't think this is guaranteed to be right. For the |
8980 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 8981 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 8982 | |
5f5c8ee5 GM |
8983 | if (end < start) |
8984 | end = start; | |
8985 | if (whole < (end - start)) | |
8986 | whole = end - start; | |
b1d1124b JB |
8987 | } |
8988 | else | |
8989 | start = end = whole = 0; | |
30c566e4 | 8990 | |
88f22aff | 8991 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 8992 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 8993 | |
5f5c8ee5 GM |
8994 | /* Note that we actually used the scroll bar attached to this |
8995 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 8996 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 8997 | } |
b1d1124b | 8998 | |
5f5c8ee5 GM |
8999 | restore_buffers: |
9000 | ||
9001 | /* Restore current_buffer and value of point in it. */ | |
9002 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
5ba50c51 | 9003 | if (really_switched_buffer) |
f72df6ac | 9004 | set_buffer_internal_1 (old); |
e481f960 RS |
9005 | else |
9006 | set_buffer_temp (old); | |
5f5c8ee5 | 9007 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
9008 | |
9009 | unbind_to (count, Qnil); | |
a2889657 | 9010 | } |
a2889657 | 9011 | |
5f5c8ee5 GM |
9012 | |
9013 | /* Build the complete desired matrix of WINDOW with a window start | |
9014 | buffer position POS. Value is non-zero if successful. It is zero | |
9015 | if fonts were loaded during redisplay which makes re-adjusting | |
9016 | glyph matrices necessary. */ | |
9017 | ||
9018 | int | |
a2889657 JB |
9019 | try_window (window, pos) |
9020 | Lisp_Object window; | |
5f5c8ee5 GM |
9021 | struct text_pos pos; |
9022 | { | |
9023 | struct window *w = XWINDOW (window); | |
9024 | struct it it; | |
9025 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 9026 | |
5f5c8ee5 GM |
9027 | /* Make POS the new window start. */ |
9028 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 9029 | |
5f5c8ee5 GM |
9030 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
9031 | w->cursor.vpos = -1; | |
a2889657 | 9032 | overlay_arrow_seen = 0; |
642eefc6 | 9033 | |
5f5c8ee5 GM |
9034 | /* Initialize iterator and info to start at POS. */ |
9035 | start_display (&it, w, pos); | |
a2889657 | 9036 | |
5f5c8ee5 GM |
9037 | /* Display all lines of W. */ |
9038 | while (it.current_y < it.last_visible_y) | |
9039 | { | |
9040 | if (display_line (&it)) | |
9041 | last_text_row = it.glyph_row - 1; | |
9042 | if (fonts_changed_p) | |
9043 | return 0; | |
9044 | } | |
a2889657 | 9045 | |
5f5c8ee5 GM |
9046 | /* If bottom moved off end of frame, change mode line percentage. */ |
9047 | if (XFASTINT (w->window_end_pos) <= 0 | |
9048 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
9049 | w->update_mode_line = Qt; |
9050 | ||
5f5c8ee5 GM |
9051 | /* Set window_end_pos to the offset of the last character displayed |
9052 | on the window from the end of current_buffer. Set | |
9053 | window_end_vpos to its row number. */ | |
9054 | if (last_text_row) | |
9055 | { | |
9056 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
9057 | w->window_end_bytepos | |
9058 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9059 | XSETFASTINT (w->window_end_pos, | |
9060 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9061 | XSETFASTINT (w->window_end_vpos, | |
9062 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9063 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
9064 | ->displays_text_p); | |
9065 | } | |
9066 | else | |
9067 | { | |
9068 | w->window_end_bytepos = 0; | |
9069 | XSETFASTINT (w->window_end_pos, 0); | |
9070 | XSETFASTINT (w->window_end_vpos, 0); | |
9071 | } | |
9072 | ||
a2889657 JB |
9073 | /* But that is not valid info until redisplay finishes. */ |
9074 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 9075 | return 1; |
a2889657 | 9076 | } |
5f5c8ee5 GM |
9077 | |
9078 | ||
a2889657 | 9079 | \f |
5f5c8ee5 GM |
9080 | /************************************************************************ |
9081 | Window redisplay reusing current matrix when buffer has not changed | |
9082 | ************************************************************************/ | |
9083 | ||
9084 | /* Try redisplay of window W showing an unchanged buffer with a | |
9085 | different window start than the last time it was displayed by | |
9086 | reusing its current matrix. Value is non-zero if successful. | |
9087 | W->start is the new window start. */ | |
a2889657 JB |
9088 | |
9089 | static int | |
5f5c8ee5 GM |
9090 | try_window_reusing_current_matrix (w) |
9091 | struct window *w; | |
a2889657 | 9092 | { |
5f5c8ee5 GM |
9093 | struct frame *f = XFRAME (w->frame); |
9094 | struct glyph_row *row, *bottom_row; | |
9095 | struct it it; | |
9096 | struct run run; | |
9097 | struct text_pos start, new_start; | |
9098 | int nrows_scrolled, i; | |
9099 | struct glyph_row *last_text_row; | |
9100 | struct glyph_row *last_reused_text_row; | |
9101 | struct glyph_row *start_row; | |
9102 | int start_vpos, min_y, max_y; | |
9103 | ||
9104 | /* Right now this function doesn't handle terminal frames. */ | |
9105 | if (!FRAME_WINDOW_P (f)) | |
9106 | return 0; | |
a2889657 | 9107 | |
5f5c8ee5 GM |
9108 | /* Can't do this if region may have changed. */ |
9109 | if ((!NILP (Vtransient_mark_mode) | |
9110 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
9111 | || !NILP (w->region_showing) |
9112 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 9113 | return 0; |
a2889657 | 9114 | |
5f5c8ee5 GM |
9115 | /* If top-line visibility has changed, give up. */ |
9116 | if (WINDOW_WANTS_TOP_LINE_P (w) | |
9117 | != MATRIX_TOP_LINE_ROW (w->current_matrix)->mode_line_p) | |
9118 | return 0; | |
9119 | ||
9120 | /* Give up if old or new display is scrolled vertically. We could | |
9121 | make this function handle this, but right now it doesn't. */ | |
9122 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9123 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
9124 | return 0; | |
9125 | ||
9126 | /* The variable new_start now holds the new window start. The old | |
9127 | start `start' can be determined from the current matrix. */ | |
9128 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
9129 | start = start_row->start.pos; | |
9130 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 9131 | |
5f5c8ee5 GM |
9132 | /* Clear the desired matrix for the display below. */ |
9133 | clear_glyph_matrix (w->desired_matrix); | |
9134 | ||
9135 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
9136 | { | |
9137 | int first_row_y; | |
9138 | ||
9139 | IF_DEBUG (debug_method_add (w, "twu1")); | |
9140 | ||
9141 | /* Display up to a row that can be reused. The variable | |
9142 | last_text_row is set to the last row displayed that displays | |
9143 | text. */ | |
9144 | start_display (&it, w, new_start); | |
9145 | first_row_y = it.current_y; | |
9146 | w->cursor.vpos = -1; | |
9147 | last_text_row = last_reused_text_row = NULL; | |
9148 | while (it.current_y < it.last_visible_y | |
9149 | && IT_CHARPOS (it) < CHARPOS (start) | |
9150 | && !fonts_changed_p) | |
9151 | if (display_line (&it)) | |
9152 | last_text_row = it.glyph_row - 1; | |
9153 | ||
9154 | /* A value of current_y < last_visible_y means that we stopped | |
9155 | at the previous window start, which in turn means that we | |
9156 | have at least one reusable row. */ | |
9157 | if (it.current_y < it.last_visible_y) | |
a2889657 | 9158 | { |
5f5c8ee5 GM |
9159 | nrows_scrolled = it.vpos; |
9160 | ||
9161 | /* Find PT if not already found in the lines displayed. */ | |
9162 | if (w->cursor.vpos < 0) | |
a2889657 | 9163 | { |
5f5c8ee5 GM |
9164 | int dy = it.current_y - first_row_y; |
9165 | ||
9166 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9167 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9168 | { | |
9169 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
9170 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9171 | { | |
9172 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
9173 | dy, nrows_scrolled); | |
9174 | break; | |
9175 | } | |
9176 | ||
9177 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
9178 | break; | |
9179 | ||
9180 | ++row; | |
9181 | } | |
9182 | ||
9183 | /* Give up if point was not found. This shouldn't | |
9184 | happen often; not more often than with try_window | |
9185 | itself. */ | |
9186 | if (w->cursor.vpos < 0) | |
9187 | { | |
9188 | clear_glyph_matrix (w->desired_matrix); | |
9189 | return 0; | |
9190 | } | |
a2889657 | 9191 | } |
5f5c8ee5 GM |
9192 | |
9193 | /* Scroll the display. Do it before the current matrix is | |
9194 | changed. The problem here is that update has not yet | |
9195 | run, i.e. part of the current matrix is not up to date. | |
9196 | scroll_run_hook will clear the cursor, and use the | |
9197 | current matrix to get the height of the row the cursor is | |
9198 | in. */ | |
9199 | run.current_y = first_row_y; | |
9200 | run.desired_y = it.current_y; | |
9201 | run.height = it.last_visible_y - it.current_y; | |
9202 | if (run.height > 0) | |
a2889657 | 9203 | { |
5f5c8ee5 GM |
9204 | update_begin (f); |
9205 | rif->update_window_begin_hook (w); | |
9206 | rif->scroll_run_hook (w, &run); | |
9207 | rif->update_window_end_hook (w, 0); | |
9208 | update_end (f); | |
a2889657 | 9209 | } |
5f5c8ee5 GM |
9210 | |
9211 | /* Shift current matrix down by nrows_scrolled lines. */ | |
9212 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9213 | rotate_matrix (w->current_matrix, | |
9214 | start_vpos, | |
9215 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9216 | nrows_scrolled); | |
9217 | ||
9218 | /* Disable lines not reused. */ | |
9219 | for (i = 0; i < it.vpos; ++i) | |
9220 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
9221 | ||
9222 | /* Re-compute Y positions. */ | |
9223 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
9224 | min_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
9225 | max_y = it.last_visible_y; | |
9226 | while (row < bottom_row) | |
d2f84654 | 9227 | { |
5f5c8ee5 GM |
9228 | row->y = it.current_y; |
9229 | ||
9230 | if (row->y < min_y) | |
9231 | row->visible_height = row->height - (min_y - row->y); | |
9232 | else if (row->y + row->height > max_y) | |
9233 | row->visible_height | |
9234 | = row->height - (row->y + row->height - max_y); | |
9235 | else | |
9236 | row->visible_height = row->height; | |
9237 | ||
9238 | it.current_y += row->height; | |
9239 | ++it.vpos; | |
9240 | ||
9241 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9242 | last_reused_text_row = row; | |
9243 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
9244 | break; | |
9245 | ++row; | |
d2f84654 | 9246 | } |
a2889657 | 9247 | } |
5f5c8ee5 GM |
9248 | |
9249 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
9250 | reused row from the current matrix containing text, if any. | |
9251 | The value of last_text_row is the last displayed line | |
9252 | containing text. */ | |
9253 | if (last_reused_text_row) | |
a2889657 | 9254 | { |
5f5c8ee5 GM |
9255 | w->window_end_bytepos |
9256 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
9257 | XSETFASTINT (w->window_end_pos, | |
9258 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
9259 | XSETFASTINT (w->window_end_vpos, | |
9260 | MATRIX_ROW_VPOS (last_reused_text_row, | |
9261 | w->current_matrix)); | |
a2889657 | 9262 | } |
5f5c8ee5 GM |
9263 | else if (last_text_row) |
9264 | { | |
9265 | w->window_end_bytepos | |
9266 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9267 | XSETFASTINT (w->window_end_pos, | |
9268 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9269 | XSETFASTINT (w->window_end_vpos, | |
9270 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9271 | } | |
9272 | else | |
9273 | { | |
9274 | /* This window must be completely empty. */ | |
9275 | w->window_end_bytepos = 0; | |
9276 | XSETFASTINT (w->window_end_pos, 0); | |
9277 | XSETFASTINT (w->window_end_vpos, 0); | |
9278 | } | |
9279 | w->window_end_valid = Qnil; | |
a2889657 | 9280 | |
5f5c8ee5 GM |
9281 | /* Update hint: don't try scrolling again in update_window. */ |
9282 | w->desired_matrix->no_scrolling_p = 1; | |
9283 | ||
9284 | #if GLYPH_DEBUG | |
9285 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
9286 | #endif | |
9287 | return 1; | |
a2889657 | 9288 | } |
5f5c8ee5 GM |
9289 | else if (CHARPOS (new_start) > CHARPOS (start)) |
9290 | { | |
9291 | struct glyph_row *pt_row, *row; | |
9292 | struct glyph_row *first_reusable_row; | |
9293 | struct glyph_row *first_row_to_display; | |
9294 | int dy; | |
9295 | int yb = window_text_bottom_y (w); | |
9296 | ||
9297 | IF_DEBUG (debug_method_add (w, "twu2")); | |
9298 | ||
9299 | /* Find the row starting at new_start, if there is one. Don't | |
9300 | reuse a partially visible line at the end. */ | |
9301 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9302 | while (first_reusable_row->enabled_p | |
9303 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
9304 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9305 | < CHARPOS (new_start))) | |
9306 | ++first_reusable_row; | |
9307 | ||
9308 | /* Give up if there is no row to reuse. */ | |
9309 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
9310 | || !first_reusable_row->enabled_p |
9311 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9312 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
9313 | return 0; |
9314 | ||
5f5c8ee5 GM |
9315 | /* We can reuse fully visible rows beginning with |
9316 | first_reusable_row to the end of the window. Set | |
9317 | first_row_to_display to the first row that cannot be reused. | |
9318 | Set pt_row to the row containing point, if there is any. */ | |
9319 | first_row_to_display = first_reusable_row; | |
9320 | pt_row = NULL; | |
9321 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
9322 | { | |
9323 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
9324 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
9325 | pt_row = first_row_to_display; | |
a2889657 | 9326 | |
5f5c8ee5 GM |
9327 | ++first_row_to_display; |
9328 | } | |
a2889657 | 9329 | |
5f5c8ee5 GM |
9330 | /* Start displaying at the start of first_row_to_display. */ |
9331 | xassert (first_row_to_display->y < yb); | |
9332 | init_to_row_start (&it, w, first_row_to_display); | |
9333 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
9334 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
9335 | - nrows_scrolled); | |
9336 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
9337 | ||
9338 | /* Display lines beginning with first_row_to_display in the | |
9339 | desired matrix. Set last_text_row to the last row displayed | |
9340 | that displays text. */ | |
9341 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
9342 | if (pt_row == NULL) | |
9343 | w->cursor.vpos = -1; | |
9344 | last_text_row = NULL; | |
9345 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
9346 | if (display_line (&it)) | |
9347 | last_text_row = it.glyph_row - 1; | |
9348 | ||
9349 | /* Give up If point isn't in a row displayed or reused. */ | |
9350 | if (w->cursor.vpos < 0) | |
9351 | { | |
9352 | clear_glyph_matrix (w->desired_matrix); | |
9353 | return 0; | |
9354 | } | |
12adba34 | 9355 | |
5f5c8ee5 GM |
9356 | /* If point is in a reused row, adjust y and vpos of the cursor |
9357 | position. */ | |
9358 | if (pt_row) | |
9359 | { | |
9360 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
9361 | w->current_matrix); | |
9362 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
9363 | } |
9364 | ||
5f5c8ee5 GM |
9365 | /* Scroll the display. */ |
9366 | run.current_y = first_reusable_row->y; | |
9367 | run.desired_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
9368 | run.height = it.last_visible_y - run.current_y; | |
9369 | if (run.height) | |
9370 | { | |
9371 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
9372 | update_begin (f); | |
9373 | rif->update_window_begin_hook (w); | |
9374 | rif->scroll_run_hook (w, &run); | |
9375 | rif->update_window_end_hook (w, 0); | |
9376 | update_end (f); | |
9377 | } | |
a2889657 | 9378 | |
5f5c8ee5 GM |
9379 | /* Adjust Y positions of reused rows. */ |
9380 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9381 | row = first_reusable_row; | |
9382 | dy = first_reusable_row->y; | |
9383 | min_y = WINDOW_DISPLAY_TOP_LINE_HEIGHT (w); | |
9384 | max_y = it.last_visible_y; | |
9385 | while (row < first_row_to_display) | |
9386 | { | |
9387 | row->y -= dy; | |
9388 | if (row->y < min_y) | |
9389 | row->visible_height = row->height - (min_y - row->y); | |
9390 | else if (row->y + row->height > max_y) | |
9391 | row->visible_height | |
9392 | = row->height - (row->y + row->height - max_y); | |
9393 | else | |
9394 | row->visible_height = row->height; | |
9395 | ++row; | |
9396 | } | |
a2889657 | 9397 | |
5f5c8ee5 GM |
9398 | /* Disable rows not reused. */ |
9399 | while (row < bottom_row) | |
9400 | { | |
9401 | row->enabled_p = 0; | |
9402 | ++row; | |
9403 | } | |
9404 | ||
9405 | /* Scroll the current matrix. */ | |
9406 | xassert (nrows_scrolled > 0); | |
9407 | rotate_matrix (w->current_matrix, | |
9408 | start_vpos, | |
9409 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9410 | -nrows_scrolled); | |
9411 | ||
9412 | /* Adjust window end. A null value of last_text_row means that | |
9413 | the window end is in reused rows which in turn means that | |
9414 | only its vpos can have changed. */ | |
9415 | if (last_text_row) | |
9416 | { | |
9417 | w->window_end_bytepos | |
9418 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9419 | XSETFASTINT (w->window_end_pos, | |
9420 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9421 | XSETFASTINT (w->window_end_vpos, | |
9422 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9423 | } | |
9424 | else | |
a2889657 | 9425 | { |
e8e536a9 | 9426 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 9427 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 9428 | } |
5f5c8ee5 GM |
9429 | |
9430 | w->window_end_valid = Qnil; | |
9431 | w->desired_matrix->no_scrolling_p = 1; | |
9432 | ||
9433 | #if GLYPH_DEBUG | |
9434 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
9435 | #endif | |
9436 | return 1; | |
a2889657 | 9437 | } |
5f5c8ee5 GM |
9438 | |
9439 | return 0; | |
9440 | } | |
a2889657 | 9441 | |
a2889657 | 9442 | |
5f5c8ee5 GM |
9443 | \f |
9444 | /************************************************************************ | |
9445 | Window redisplay reusing current matrix when buffer has changed | |
9446 | ************************************************************************/ | |
9447 | ||
9448 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
9449 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
9450 | int *, int *)); | |
9451 | static struct glyph_row * | |
9452 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
9453 | struct glyph_row *)); | |
9454 | ||
9455 | ||
9456 | /* Return the last row in MATRIX displaying text. If row START is | |
9457 | non-null, start searching with that row. IT gives the dimensions | |
9458 | of the display. Value is null if matrix is empty; otherwise it is | |
9459 | a pointer to the row found. */ | |
9460 | ||
9461 | static struct glyph_row * | |
9462 | find_last_row_displaying_text (matrix, it, start) | |
9463 | struct glyph_matrix *matrix; | |
9464 | struct it *it; | |
9465 | struct glyph_row *start; | |
9466 | { | |
9467 | struct glyph_row *row, *row_found; | |
9468 | ||
9469 | /* Set row_found to the last row in IT->w's current matrix | |
9470 | displaying text. The loop looks funny but think of partially | |
9471 | visible lines. */ | |
9472 | row_found = NULL; | |
9473 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
9474 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9475 | { | |
9476 | xassert (row->enabled_p); | |
9477 | row_found = row; | |
9478 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
9479 | break; | |
9480 | ++row; | |
a2889657 | 9481 | } |
5f5c8ee5 GM |
9482 | |
9483 | return row_found; | |
9484 | } | |
9485 | ||
a2889657 | 9486 | |
5f5c8ee5 GM |
9487 | /* Return the last row in the current matrix of W that is not affected |
9488 | by changes at the start of current_buffer that occurred since the | |
9489 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 9490 | |
5f5c8ee5 GM |
9491 | The global variable beg_unchanged has to contain the number of |
9492 | bytes unchanged at the start of current_buffer. BEG + | |
9493 | beg_unchanged is the buffer position of the first changed byte in | |
9494 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
9495 | at the same buffer positions as they were when the current matrix | |
9496 | was built. */ | |
9497 | ||
9498 | static struct glyph_row * | |
9499 | get_last_unchanged_at_beg_row (w) | |
9500 | struct window *w; | |
9501 | { | |
9142dd5b | 9502 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
9503 | struct glyph_row *row; |
9504 | struct glyph_row *row_found = NULL; | |
9505 | int yb = window_text_bottom_y (w); | |
9506 | ||
9507 | /* Find the last row displaying unchanged text. */ | |
9508 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9509 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
9510 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 9511 | { |
5f5c8ee5 GM |
9512 | if (/* If row ends before first_changed_pos, it is unchanged, |
9513 | except in some case. */ | |
9514 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
9515 | /* When row ends in ZV and we write at ZV it is not | |
9516 | unchanged. */ | |
9517 | && !row->ends_at_zv_p | |
9518 | /* When first_changed_pos is the end of a continued line, | |
9519 | row is not unchanged because it may be no longer | |
9520 | continued. */ | |
9521 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
9522 | && row->continued_p)) | |
9523 | row_found = row; | |
9524 | ||
9525 | /* Stop if last visible row. */ | |
9526 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
9527 | break; | |
9528 | ||
9529 | ++row; | |
a2889657 JB |
9530 | } |
9531 | ||
5f5c8ee5 | 9532 | return row_found; |
a2889657 | 9533 | } |
5f5c8ee5 GM |
9534 | |
9535 | ||
9536 | /* Find the first glyph row in the current matrix of W that is not | |
9537 | affected by changes at the end of current_buffer since the last | |
9538 | time the window was redisplayed. Return in *DELTA the number of | |
c59c668a GM |
9539 | chars by which buffer positions in unchanged text at the end of |
9540 | current_buffer must be adjusted. Return in *DELTA_BYTES the | |
9541 | corresponding number of bytes. Value is null if no such row | |
9542 | exists, i.e. all rows are affected by changes. */ | |
5f5c8ee5 GM |
9543 | |
9544 | static struct glyph_row * | |
9545 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
9546 | struct window *w; | |
9547 | int *delta, *delta_bytes; | |
a2889657 | 9548 | { |
5f5c8ee5 GM |
9549 | struct glyph_row *row; |
9550 | struct glyph_row *row_found = NULL; | |
c581d710 | 9551 | |
5f5c8ee5 | 9552 | *delta = *delta_bytes = 0; |
b2a76982 | 9553 | |
5f5c8ee5 GM |
9554 | /* A value of window_end_pos >= end_unchanged means that the window |
9555 | end is in the range of changed text. If so, there is no | |
9556 | unchanged row at the end of W's current matrix. */ | |
9557 | xassert (!NILP (w->window_end_valid)); | |
9142dd5b | 9558 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
9559 | return NULL; |
9560 | ||
9561 | /* Set row to the last row in W's current matrix displaying text. */ | |
9562 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9563 | ||
5f5c8ee5 GM |
9564 | /* If matrix is entirely empty, no unchanged row exists. */ |
9565 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9566 | { | |
9567 | /* The value of row is the last glyph row in the matrix having a | |
9568 | meaningful buffer position in it. The end position of row | |
9569 | corresponds to window_end_pos. This allows us to translate | |
9570 | buffer positions in the current matrix to current buffer | |
9571 | positions for characters not in changed text. */ | |
9572 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
9573 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
9574 | int last_unchanged_pos, last_unchanged_pos_old; | |
9575 | struct glyph_row *first_text_row | |
9576 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9577 | ||
9578 | *delta = Z - Z_old; | |
9579 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
9580 | ||
9581 | /* Set last_unchanged_pos to the buffer position of the last | |
9582 | character in the buffer that has not been changed. Z is the | |
9583 | index + 1 of the last byte in current_buffer, i.e. by | |
9584 | subtracting end_unchanged we get the index of the last | |
9585 | unchanged character, and we have to add BEG to get its buffer | |
9586 | position. */ | |
9142dd5b | 9587 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
9588 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
9589 | ||
9590 | /* Search backward from ROW for a row displaying a line that | |
9591 | starts at a minimum position >= last_unchanged_pos_old. */ | |
9592 | while (row >= first_text_row) | |
9593 | { | |
9594 | xassert (row->enabled_p); | |
9595 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9596 | ||
9597 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
9598 | row_found = row; | |
9599 | --row; | |
9600 | } | |
9601 | } | |
9602 | ||
9603 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
9604 | return row_found; | |
c581d710 RS |
9605 | } |
9606 | ||
c581d710 | 9607 | |
5f5c8ee5 GM |
9608 | /* Make sure that glyph rows in the current matrix of window W |
9609 | reference the same glyph memory as corresponding rows in the | |
9610 | frame's frame matrix. This function is called after scrolling W's | |
9611 | current matrix on a terminal frame in try_window_id and | |
9612 | try_window_reusing_current_matrix. */ | |
9613 | ||
9614 | static void | |
9615 | sync_frame_with_window_matrix_rows (w) | |
9616 | struct window *w; | |
c581d710 | 9617 | { |
5f5c8ee5 GM |
9618 | struct frame *f = XFRAME (w->frame); |
9619 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
9620 | ||
9621 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
9622 | must have a frame matrix. */ | |
9623 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
9624 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
9625 | xassert (!FRAME_WINDOW_P (f)); | |
9626 | ||
9627 | /* If W is a full-width window, glyph pointers in W's current matrix | |
9628 | have, by definition, to be the same as glyph pointers in the | |
9629 | corresponding frame matrix. */ | |
9630 | window_row = w->current_matrix->rows; | |
9631 | window_row_end = window_row + w->current_matrix->nrows; | |
9632 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
9633 | while (window_row < window_row_end) | |
659a218f | 9634 | { |
5f5c8ee5 GM |
9635 | int area; |
9636 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) | |
9637 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
9638 | ++window_row, ++frame_row; | |
659a218f | 9639 | } |
a2889657 | 9640 | } |
5f5c8ee5 GM |
9641 | |
9642 | ||
9643 | /* Try to redisplay window W by reusing its existing display. W's | |
9644 | current matrix must be up to date when this function is called, | |
9645 | i.e. window_end_valid must not be nil. | |
9646 | ||
9647 | Value is | |
9648 | ||
9649 | 1 if display has been updated | |
9650 | 0 if otherwise unsuccessful | |
9651 | -1 if redisplay with same window start is known not to succeed | |
9652 | ||
9653 | The following steps are performed: | |
9654 | ||
9655 | 1. Find the last row in the current matrix of W that is not | |
9656 | affected by changes at the start of current_buffer. If no such row | |
9657 | is found, give up. | |
9658 | ||
9659 | 2. Find the first row in W's current matrix that is not affected by | |
9660 | changes at the end of current_buffer. Maybe there is no such row. | |
9661 | ||
9662 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
9663 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
9664 | the window. | |
9665 | ||
9666 | 4. If cursor is not known to appear on the window, give up. | |
9667 | ||
9668 | 5. If display stopped at the row found in step 2, scroll the | |
9669 | display and current matrix as needed. | |
9670 | ||
9671 | 6. Maybe display some lines at the end of W, if we must. This can | |
9672 | happen under various circumstances, like a partially visible line | |
9673 | becoming fully visible, or because newly displayed lines are displayed | |
9674 | in smaller font sizes. | |
9675 | ||
9676 | 7. Update W's window end information. */ | |
9677 | ||
9678 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
9679 | |
9680 | static int | |
5f5c8ee5 | 9681 | try_window_id (w) |
12adba34 | 9682 | struct window *w; |
12adba34 | 9683 | { |
5f5c8ee5 GM |
9684 | struct frame *f = XFRAME (w->frame); |
9685 | struct glyph_matrix *current_matrix = w->current_matrix; | |
9686 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
9687 | struct glyph_row *last_unchanged_at_beg_row; | |
9688 | struct glyph_row *first_unchanged_at_end_row; | |
9689 | struct glyph_row *row; | |
9690 | struct glyph_row *bottom_row; | |
9691 | int bottom_vpos; | |
9692 | struct it it; | |
9693 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
9694 | struct text_pos start_pos; | |
9695 | struct run run; | |
9696 | int first_unchanged_at_end_vpos = 0; | |
9697 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
9698 | struct text_pos start; | |
9699 | ||
9700 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
9701 | ||
9702 | /* Check pre-conditions. Window end must be valid, otherwise | |
9703 | the current matrix would not be up to date. */ | |
9704 | xassert (!NILP (w->window_end_valid)); | |
9705 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
9706 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
9707 | ||
9708 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
9709 | only if buffer has really changed. The reason is that the gap is | |
9710 | initially at Z for freshly visited files. The code below would | |
9711 | set end_unchanged to 0 in that case. */ | |
9712 | if (MODIFF > SAVE_MODIFF) | |
9713 | { | |
9142dd5b GM |
9714 | if (GPT - BEG < BEG_UNCHANGED) |
9715 | BEG_UNCHANGED = GPT - BEG; | |
9716 | if (Z - GPT < END_UNCHANGED) | |
9717 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 GM |
9718 | } |
9719 | ||
9720 | /* If window starts after a line end, and the last change is in | |
9721 | front of that newline, then changes don't affect the display. | |
9722 | This case happens with stealth-fontification. */ | |
9723 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9724 | if (CHARPOS (start) > BEGV | |
9142dd5b | 9725 | && Z - END_UNCHANGED < CHARPOS (start) - 1 |
5f5c8ee5 GM |
9726 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' |
9727 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9728 | { | |
9729 | /* We have to update window end positions because the buffer's | |
9730 | size has changed. */ | |
9731 | w->window_end_pos | |
9732 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9733 | w->window_end_bytepos | |
9734 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9735 | return 1; | |
9736 | } | |
9737 | ||
9738 | /* Return quickly if changes are all below what is displayed in the | |
9739 | window, and if PT is in the window. */ | |
9142dd5b | 9740 | if (BEG_UNCHANGED > MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 GM |
9741 | && PT < MATRIX_ROW_END_CHARPOS (row)) |
9742 | { | |
9743 | /* We have to update window end positions because the buffer's | |
9744 | size has changed. */ | |
9745 | w->window_end_pos | |
9746 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9747 | w->window_end_bytepos | |
9748 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9749 | return 1; | |
9750 | } | |
9751 | ||
9752 | /* Check that window start agrees with the start of the first glyph | |
9753 | row in its current matrix. Check this after we know the window | |
9754 | start is not in changed text, otherwise positions would not be | |
9755 | comparable. */ | |
9756 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9757 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
9758 | return 0; | |
9759 | ||
5f5c8ee5 GM |
9760 | /* Compute the position at which we have to start displaying new |
9761 | lines. Some of the lines at the top of the window might be | |
9762 | reusable because they are not displaying changed text. Find the | |
9763 | last row in W's current matrix not affected by changes at the | |
9764 | start of current_buffer. Value is null if changes start in the | |
9765 | first line of window. */ | |
9766 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
9767 | if (last_unchanged_at_beg_row) | |
9768 | { | |
9769 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
9770 | start_pos = it.current.pos; | |
9771 | ||
9772 | /* Start displaying new lines in the desired matrix at the same | |
9773 | vpos we would use in the current matrix, i.e. below | |
9774 | last_unchanged_at_beg_row. */ | |
9775 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
9776 | current_matrix); | |
9777 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
9778 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
9779 | ||
9780 | xassert (it.hpos == 0 && it.current_x == 0); | |
9781 | } | |
9782 | else | |
9783 | { | |
9784 | /* There are no reusable lines at the start of the window. | |
9785 | Start displaying in the first line. */ | |
9786 | start_display (&it, w, start); | |
9787 | start_pos = it.current.pos; | |
9788 | } | |
9789 | ||
9790 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
9791 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
9792 | ||
9793 | /* Find the first row that is not affected by changes at the end of | |
9794 | the buffer. Value will be null if there is no unchanged row, in | |
9795 | which case we must redisplay to the end of the window. delta | |
9796 | will be set to the value by which buffer positions beginning with | |
9797 | first_unchanged_at_end_row have to be adjusted due to text | |
9798 | changes. */ | |
9799 | first_unchanged_at_end_row | |
9800 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
9801 | IF_DEBUG (debug_delta = delta); | |
9802 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
9803 | ||
9804 | /* Set stop_pos to the buffer position up to which we will have to | |
9805 | display new lines. If first_unchanged_at_end_row != NULL, this | |
9806 | is the buffer position of the start of the line displayed in that | |
9807 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
9808 | that we don't stop at a buffer position. */ | |
9809 | stop_pos = 0; | |
9810 | if (first_unchanged_at_end_row) | |
9811 | { | |
9812 | xassert (last_unchanged_at_beg_row == NULL | |
9813 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
9814 | ||
9815 | /* If this is a continuation line, move forward to the next one | |
9816 | that isn't. Changes in lines above affect this line. | |
9817 | Caution: this may move first_unchanged_at_end_row to a row | |
9818 | not displaying text. */ | |
9819 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
9820 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9821 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9822 | < it.last_visible_y)) | |
9823 | ++first_unchanged_at_end_row; | |
9824 | ||
9825 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9826 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9827 | >= it.last_visible_y)) | |
9828 | first_unchanged_at_end_row = NULL; | |
9829 | else | |
9830 | { | |
9831 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
9832 | + delta); | |
9833 | first_unchanged_at_end_vpos | |
9834 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 9835 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
9836 | } |
9837 | } | |
9838 | else if (last_unchanged_at_beg_row == NULL) | |
9839 | return 0; | |
9840 | ||
9841 | ||
9842 | #if GLYPH_DEBUG | |
9843 | ||
9844 | /* Either there is no unchanged row at the end, or the one we have | |
9845 | now displays text. This is a necessary condition for the window | |
9846 | end pos calculation at the end of this function. */ | |
9847 | xassert (first_unchanged_at_end_row == NULL | |
9848 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
9849 | ||
9850 | debug_last_unchanged_at_beg_vpos | |
9851 | = (last_unchanged_at_beg_row | |
9852 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
9853 | : -1); | |
9854 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
9855 | ||
9856 | #endif /* GLYPH_DEBUG != 0 */ | |
9857 | ||
9858 | ||
9859 | /* Display new lines. Set last_text_row to the last new line | |
9860 | displayed which has text on it, i.e. might end up as being the | |
9861 | line where the window_end_vpos is. */ | |
9862 | w->cursor.vpos = -1; | |
9863 | last_text_row = NULL; | |
9864 | overlay_arrow_seen = 0; | |
9865 | while (it.current_y < it.last_visible_y | |
9866 | && !fonts_changed_p | |
9867 | && (first_unchanged_at_end_row == NULL | |
9868 | || IT_CHARPOS (it) < stop_pos)) | |
9869 | { | |
9870 | if (display_line (&it)) | |
9871 | last_text_row = it.glyph_row - 1; | |
9872 | } | |
9873 | ||
9874 | if (fonts_changed_p) | |
9875 | return -1; | |
9876 | ||
9877 | ||
9878 | /* Compute differences in buffer positions, y-positions etc. for | |
9879 | lines reused at the bottom of the window. Compute what we can | |
9880 | scroll. */ | |
9881 | if (first_unchanged_at_end_row) | |
9882 | { | |
9883 | dvpos = (it.vpos | |
9884 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
9885 | current_matrix)); | |
9886 | dy = it.current_y - first_unchanged_at_end_row->y; | |
9887 | run.current_y = first_unchanged_at_end_row->y; | |
9888 | run.desired_y = run.current_y + dy; | |
9889 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
9890 | } | |
9891 | else | |
9892 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
9893 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); | |
9894 | ||
8f8ba186 | 9895 | |
5f5c8ee5 GM |
9896 | /* Find the cursor if not already found. We have to decide whether |
9897 | PT will appear on this window (it sometimes doesn't, but this is | |
9898 | not a very frequent case.) This decision has to be made before | |
9899 | the current matrix is altered. A value of cursor.vpos < 0 means | |
9900 | that PT is either in one of the lines beginning at | |
9901 | first_unchanged_at_end_row or below the window. Don't care for | |
9902 | lines that might be displayed later at the window end; as | |
9903 | mentioned, this is not a frequent case. */ | |
9904 | if (w->cursor.vpos < 0) | |
9905 | { | |
9906 | int last_y = min (it.last_visible_y, it.last_visible_y + dy); | |
9907 | ||
9908 | /* Cursor in unchanged rows at the top? */ | |
9909 | if (PT < CHARPOS (start_pos) | |
9910 | && last_unchanged_at_beg_row) | |
9911 | { | |
9912 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9913 | while (row <= last_unchanged_at_beg_row | |
9914 | && MATRIX_ROW_END_CHARPOS (row) <= PT) | |
9915 | ++row; | |
9916 | xassert (row <= last_unchanged_at_beg_row); | |
9917 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
9918 | } | |
9919 | ||
9920 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
9921 | else if (first_unchanged_at_end_row) | |
9922 | { | |
9923 | row = first_unchanged_at_end_row; | |
468155d7 | 9924 | |
5f5c8ee5 GM |
9925 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) |
9926 | { | |
9927 | if (PT - delta >= MATRIX_ROW_START_CHARPOS (row) | |
9928 | && PT - delta < MATRIX_ROW_END_CHARPOS (row)) | |
9929 | { | |
9930 | set_cursor_from_row (w, row, w->current_matrix, delta, | |
9931 | delta_bytes, dy, dvpos); | |
9932 | break; | |
9933 | } | |
9934 | else if (MATRIX_ROW_BOTTOM_Y (row) >= last_y) | |
9935 | break; | |
9936 | ++row; | |
9937 | } | |
468155d7 GM |
9938 | |
9939 | /* If PT is at ZV, this is not in a line displaying text. | |
9940 | Check that case. */ | |
9941 | if (w->cursor.vpos < 0 | |
9942 | && PT - delta == MATRIX_ROW_START_CHARPOS (row) | |
9943 | && row->ends_at_zv_p) | |
9944 | set_cursor_from_row (w, row, w->current_matrix, delta, | |
9945 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
9946 | } |
9947 | ||
9948 | /* Give up if cursor was not found. */ | |
9949 | if (w->cursor.vpos < 0) | |
9950 | { | |
9951 | clear_glyph_matrix (w->desired_matrix); | |
9952 | return -1; | |
9953 | } | |
9954 | } | |
9955 | ||
9956 | /* Don't let the cursor end in the scroll margins. */ | |
9957 | { | |
9958 | int this_scroll_margin, cursor_height; | |
9959 | ||
9960 | this_scroll_margin = max (0, scroll_margin); | |
9961 | this_scroll_margin = min (this_scroll_margin, | |
9962 | XFASTINT (w->height) / 4); | |
9963 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
9964 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
9965 | ||
9966 | if ((w->cursor.y < this_scroll_margin | |
9967 | && CHARPOS (start) > BEGV) | |
9968 | /* Don't take scroll margin into account at the bottom because | |
9969 | old redisplay didn't do it either. */ | |
9970 | || w->cursor.y + cursor_height > it.last_visible_y) | |
9971 | { | |
9972 | w->cursor.vpos = -1; | |
9973 | clear_glyph_matrix (w->desired_matrix); | |
9974 | return -1; | |
9975 | } | |
9976 | } | |
9977 | ||
9978 | /* Scroll the display. Do it before changing the current matrix so | |
9979 | that xterm.c doesn't get confused about where the cursor glyph is | |
9980 | found. */ | |
9981 | if (dy) | |
9982 | { | |
9983 | update_begin (f); | |
9984 | ||
9985 | if (FRAME_WINDOW_P (f)) | |
9986 | { | |
9987 | rif->update_window_begin_hook (w); | |
9988 | rif->scroll_run_hook (w, &run); | |
9989 | rif->update_window_end_hook (w, 0); | |
9990 | } | |
9991 | else | |
9992 | { | |
9993 | /* Terminal frame. In this case, dvpos gives the number of | |
9994 | lines to scroll by; dvpos < 0 means scroll up. */ | |
9995 | int first_unchanged_at_end_vpos | |
9996 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
9997 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
9998 | int end = XFASTINT (w->top) + window_internal_height (w); | |
9999 | ||
10000 | /* Perform the operation on the screen. */ | |
10001 | if (dvpos > 0) | |
10002 | { | |
10003 | /* Scroll last_unchanged_at_beg_row to the end of the | |
10004 | window down dvpos lines. */ | |
10005 | set_terminal_window (end); | |
10006 | ||
10007 | /* On dumb terminals delete dvpos lines at the end | |
10008 | before inserting dvpos empty lines. */ | |
10009 | if (!scroll_region_ok) | |
10010 | ins_del_lines (end - dvpos, -dvpos); | |
10011 | ||
10012 | /* Insert dvpos empty lines in front of | |
10013 | last_unchanged_at_beg_row. */ | |
10014 | ins_del_lines (from, dvpos); | |
10015 | } | |
10016 | else if (dvpos < 0) | |
10017 | { | |
10018 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
10019 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
10020 | set_terminal_window (end); | |
10021 | ||
10022 | /* Delete dvpos lines in front of | |
10023 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
10024 | the cursor to the given vpos and emit |dvpos| delete | |
10025 | line sequences. */ | |
10026 | ins_del_lines (from + dvpos, dvpos); | |
10027 | ||
10028 | /* On a dumb terminal insert dvpos empty lines at the | |
10029 | end. */ | |
10030 | if (!scroll_region_ok) | |
10031 | ins_del_lines (end + dvpos, -dvpos); | |
10032 | } | |
10033 | ||
10034 | set_terminal_window (0); | |
10035 | } | |
10036 | ||
10037 | update_end (f); | |
10038 | } | |
10039 | ||
10040 | /* Shift reused rows of the current matrix to the right position. */ | |
10041 | if (dvpos < 0) | |
10042 | { | |
10043 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
10044 | bottom_vpos, dvpos); | |
10045 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
10046 | bottom_vpos, 0); | |
10047 | } | |
10048 | else if (dvpos > 0) | |
10049 | { | |
10050 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
10051 | bottom_vpos, dvpos); | |
10052 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
10053 | first_unchanged_at_end_vpos + dvpos, 0); | |
10054 | } | |
10055 | ||
10056 | /* For frame-based redisplay, make sure that current frame and window | |
10057 | matrix are in sync with respect to glyph memory. */ | |
10058 | if (!FRAME_WINDOW_P (f)) | |
10059 | sync_frame_with_window_matrix_rows (w); | |
10060 | ||
10061 | /* Adjust buffer positions in reused rows. */ | |
10062 | if (delta) | |
10063 | increment_glyph_matrix_buffer_positions (current_matrix, | |
10064 | first_unchanged_at_end_vpos + dvpos, | |
10065 | bottom_vpos, delta, delta_bytes); | |
10066 | ||
10067 | /* Adjust Y positions. */ | |
10068 | if (dy) | |
10069 | shift_glyph_matrix (w, current_matrix, | |
10070 | first_unchanged_at_end_vpos + dvpos, | |
10071 | bottom_vpos, dy); | |
10072 | ||
10073 | if (first_unchanged_at_end_row) | |
10074 | first_unchanged_at_end_row += dvpos; | |
10075 | ||
10076 | /* If scrolling up, there may be some lines to display at the end of | |
10077 | the window. */ | |
10078 | last_text_row_at_end = NULL; | |
10079 | if (dy < 0) | |
10080 | { | |
10081 | /* Set last_row to the glyph row in the current matrix where the | |
10082 | window end line is found. It has been moved up or down in | |
10083 | the matrix by dvpos. */ | |
10084 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
10085 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
10086 | ||
10087 | /* If last_row is the window end line, it should display text. */ | |
10088 | xassert (last_row->displays_text_p); | |
10089 | ||
10090 | /* If window end line was partially visible before, begin | |
10091 | displaying at that line. Otherwise begin displaying with the | |
10092 | line following it. */ | |
10093 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
10094 | { | |
10095 | init_to_row_start (&it, w, last_row); | |
10096 | it.vpos = last_vpos; | |
10097 | it.current_y = last_row->y; | |
10098 | } | |
10099 | else | |
10100 | { | |
10101 | init_to_row_end (&it, w, last_row); | |
10102 | it.vpos = 1 + last_vpos; | |
10103 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
10104 | ++last_row; | |
10105 | } | |
12adba34 | 10106 | |
5f5c8ee5 GM |
10107 | /* We may start in a continuation line. If so, we have to get |
10108 | the right continuation_lines_width and current_x. */ | |
10109 | it.continuation_lines_width = last_row->continuation_lines_width; | |
10110 | it.hpos = it.current_x = 0; | |
10111 | ||
10112 | /* Display the rest of the lines at the window end. */ | |
10113 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10114 | while (it.current_y < it.last_visible_y | |
10115 | && !fonts_changed_p) | |
10116 | { | |
10117 | /* Is it always sure that the display agrees with lines in | |
10118 | the current matrix? I don't think so, so we mark rows | |
10119 | displayed invalid in the current matrix by setting their | |
10120 | enabled_p flag to zero. */ | |
10121 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
10122 | if (display_line (&it)) | |
10123 | last_text_row_at_end = it.glyph_row - 1; | |
10124 | } | |
10125 | } | |
12adba34 | 10126 | |
5f5c8ee5 GM |
10127 | /* Update window_end_pos and window_end_vpos. */ |
10128 | if (first_unchanged_at_end_row | |
10129 | && first_unchanged_at_end_row->y < it.last_visible_y | |
10130 | && !last_text_row_at_end) | |
10131 | { | |
10132 | /* Window end line if one of the preserved rows from the current | |
10133 | matrix. Set row to the last row displaying text in current | |
10134 | matrix starting at first_unchanged_at_end_row, after | |
10135 | scrolling. */ | |
10136 | xassert (first_unchanged_at_end_row->displays_text_p); | |
10137 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
10138 | first_unchanged_at_end_row); | |
10139 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
10140 | ||
10141 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
10142 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
10143 | XSETFASTINT (w->window_end_vpos, | |
10144 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
10145 | } | |
10146 | else if (last_text_row_at_end) | |
10147 | { | |
10148 | XSETFASTINT (w->window_end_pos, | |
10149 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
10150 | w->window_end_bytepos | |
10151 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
10152 | XSETFASTINT (w->window_end_vpos, | |
10153 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
10154 | } | |
10155 | else if (last_text_row) | |
10156 | { | |
10157 | /* We have displayed either to the end of the window or at the | |
10158 | end of the window, i.e. the last row with text is to be found | |
10159 | in the desired matrix. */ | |
10160 | XSETFASTINT (w->window_end_pos, | |
10161 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10162 | w->window_end_bytepos | |
10163 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
10164 | XSETFASTINT (w->window_end_vpos, | |
10165 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
10166 | } | |
10167 | else if (first_unchanged_at_end_row == NULL | |
10168 | && last_text_row == NULL | |
10169 | && last_text_row_at_end == NULL) | |
10170 | { | |
10171 | /* Displayed to end of window, but no line containing text was | |
10172 | displayed. Lines were deleted at the end of the window. */ | |
10173 | int vpos; | |
10174 | int top_line_p = WINDOW_WANTS_TOP_LINE_P (w) ? 1 : 0; | |
10175 | ||
10176 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
10177 | if ((w->desired_matrix->rows[vpos + top_line_p].enabled_p | |
10178 | && w->desired_matrix->rows[vpos + top_line_p].displays_text_p) | |
10179 | || (!w->desired_matrix->rows[vpos + top_line_p].enabled_p | |
10180 | && w->current_matrix->rows[vpos + top_line_p].displays_text_p)) | |
10181 | break; | |
12adba34 | 10182 | |
5f5c8ee5 GM |
10183 | w->window_end_vpos = make_number (vpos); |
10184 | } | |
10185 | else | |
10186 | abort (); | |
10187 | ||
10188 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
10189 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 10190 | |
5f5c8ee5 GM |
10191 | /* Record that display has not been completed. */ |
10192 | w->window_end_valid = Qnil; | |
10193 | w->desired_matrix->no_scrolling_p = 1; | |
10194 | return 1; | |
12adba34 | 10195 | } |
0f9c0ff0 | 10196 | |
a2889657 | 10197 | |
5f5c8ee5 GM |
10198 | \f |
10199 | /*********************************************************************** | |
10200 | More debugging support | |
10201 | ***********************************************************************/ | |
a2889657 | 10202 | |
5f5c8ee5 | 10203 | #if GLYPH_DEBUG |
a2889657 | 10204 | |
5f5c8ee5 GM |
10205 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
10206 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 10207 | |
31b24551 | 10208 | |
5f5c8ee5 GM |
10209 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
10210 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 10211 | |
5f5c8ee5 GM |
10212 | void |
10213 | dump_glyph_matrix (matrix, with_glyphs_p) | |
10214 | struct glyph_matrix *matrix; | |
10215 | int with_glyphs_p; | |
10216 | { | |
efc63ef0 | 10217 | int i; |
5f5c8ee5 GM |
10218 | for (i = 0; i < matrix->nrows; ++i) |
10219 | dump_glyph_row (matrix, i, with_glyphs_p); | |
10220 | } | |
31b24551 | 10221 | |
68a37fa8 | 10222 | |
5f5c8ee5 GM |
10223 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
10224 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 10225 | |
5f5c8ee5 GM |
10226 | void |
10227 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
10228 | struct glyph_matrix *matrix; | |
10229 | int vpos, with_glyphs_p; | |
10230 | { | |
10231 | struct glyph_row *row; | |
10232 | ||
10233 | if (vpos < 0 || vpos >= matrix->nrows) | |
10234 | return; | |
10235 | ||
10236 | row = MATRIX_ROW (matrix, vpos); | |
10237 | ||
10238 | fprintf (stderr, "Row Start End Used oEI><O\\CTZF X Y W\n"); | |
10239 | fprintf (stderr, "=============================================\n"); | |
10240 | ||
10241 | 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", | |
10242 | row - matrix->rows, | |
10243 | MATRIX_ROW_START_CHARPOS (row), | |
10244 | MATRIX_ROW_END_CHARPOS (row), | |
10245 | row->used[TEXT_AREA], | |
10246 | row->contains_overlapping_glyphs_p, | |
10247 | row->enabled_p, | |
10248 | row->inverse_p, | |
10249 | row->truncated_on_left_p, | |
10250 | row->truncated_on_right_p, | |
10251 | row->overlay_arrow_p, | |
10252 | row->continued_p, | |
10253 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
10254 | row->displays_text_p, | |
10255 | row->ends_at_zv_p, | |
10256 | row->fill_line_p, | |
10257 | row->x, | |
10258 | row->y, | |
10259 | row->pixel_width); | |
10260 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, | |
10261 | row->end.overlay_string_index); | |
10262 | fprintf (stderr, "%9d %5d\n", | |
10263 | CHARPOS (row->start.string_pos), | |
10264 | CHARPOS (row->end.string_pos)); | |
10265 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
10266 | row->end.dpvec_index); | |
10267 | ||
10268 | if (with_glyphs_p) | |
bd66d1ba | 10269 | { |
5f5c8ee5 GM |
10270 | struct glyph *glyph, *glyph_end; |
10271 | int prev_had_glyphs_p; | |
10272 | ||
10273 | glyph = row->glyphs[TEXT_AREA]; | |
10274 | glyph_end = glyph + row->used[TEXT_AREA]; | |
10275 | ||
10276 | /* Glyph for a line end in text. */ | |
10277 | if (glyph == glyph_end && glyph->charpos > 0) | |
10278 | ++glyph_end; | |
10279 | ||
10280 | if (glyph < glyph_end) | |
bd66d1ba | 10281 | { |
5f5c8ee5 GM |
10282 | fprintf (stderr, " Glyph Type Pos W Code C Face LR\n"); |
10283 | prev_had_glyphs_p = 1; | |
bd66d1ba RS |
10284 | } |
10285 | else | |
5f5c8ee5 GM |
10286 | prev_had_glyphs_p = 0; |
10287 | ||
10288 | while (glyph < glyph_end) | |
f7b4b63a | 10289 | { |
5f5c8ee5 GM |
10290 | if (glyph->type == CHAR_GLYPH) |
10291 | { | |
10292 | fprintf (stderr, | |
10293 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10294 | glyph - row->glyphs[TEXT_AREA], | |
10295 | 'C', | |
10296 | glyph->charpos, | |
10297 | glyph->pixel_width, | |
10298 | glyph->u.ch.code, | |
10299 | (glyph->u.ch.code < 0x80 && glyph->u.ch.code >= ' ' | |
10300 | ? glyph->u.ch.code | |
10301 | : '.'), | |
10302 | glyph->u.ch.face_id, | |
10303 | glyph->left_box_line_p, | |
10304 | glyph->right_box_line_p); | |
10305 | } | |
10306 | else if (glyph->type == STRETCH_GLYPH) | |
10307 | { | |
10308 | fprintf (stderr, | |
10309 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10310 | glyph - row->glyphs[TEXT_AREA], | |
10311 | 'S', | |
10312 | glyph->charpos, | |
10313 | glyph->pixel_width, | |
10314 | 0, | |
10315 | '.', | |
10316 | glyph->u.stretch.face_id, | |
10317 | glyph->left_box_line_p, | |
10318 | glyph->right_box_line_p); | |
10319 | } | |
10320 | else if (glyph->type == IMAGE_GLYPH) | |
10321 | { | |
10322 | fprintf (stderr, | |
10323 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10324 | glyph - row->glyphs[TEXT_AREA], | |
10325 | 'I', | |
10326 | glyph->charpos, | |
10327 | glyph->pixel_width, | |
10328 | glyph->u.img.id, | |
10329 | '.', | |
10330 | glyph->u.img.face_id, | |
10331 | glyph->left_box_line_p, | |
10332 | glyph->right_box_line_p); | |
10333 | } | |
10334 | ++glyph; | |
f7b4b63a | 10335 | } |
f4faa47c | 10336 | } |
5f5c8ee5 | 10337 | } |
f4faa47c | 10338 | |
a2889657 | 10339 | |
5f5c8ee5 GM |
10340 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
10341 | Sdump_glyph_matrix, 0, 1, "p", | |
10342 | "Dump the current matrix of the selected window to stderr.\n\ | |
10343 | Shows contents of glyph row structures. With non-nil optional\n\ | |
10344 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
10345 | (with_glyphs_p) | |
10346 | { | |
10347 | struct window *w = XWINDOW (selected_window); | |
10348 | struct buffer *buffer = XBUFFER (w->buffer); | |
10349 | ||
10350 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
10351 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
10352 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
10353 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
10354 | fprintf (stderr, "=============================================\n"); | |
10355 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
10356 | return Qnil; | |
10357 | } | |
1c2250c2 | 10358 | |
1fca3fae | 10359 | |
5f5c8ee5 GM |
10360 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
10361 | "Dump glyph row ROW to stderr.") | |
10362 | (row) | |
10363 | Lisp_Object row; | |
10364 | { | |
10365 | CHECK_NUMBER (row, 0); | |
10366 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
10367 | return Qnil; | |
10368 | } | |
1fca3fae | 10369 | |
67481ae5 | 10370 | |
5f5c8ee5 GM |
10371 | DEFUN ("dump-toolbar-row", Fdump_toolbar_row, Sdump_toolbar_row, |
10372 | 0, 0, "", "") | |
10373 | () | |
10374 | { | |
10375 | struct glyph_matrix *m = (XWINDOW (selected_frame->toolbar_window) | |
10376 | ->current_matrix); | |
10377 | dump_glyph_row (m, 0, 1); | |
10378 | return Qnil; | |
10379 | } | |
ca26e1c8 | 10380 | |
0f9c0ff0 | 10381 | |
5f5c8ee5 GM |
10382 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
10383 | Strace_redisplay_toggle, 0, 0, "", | |
10384 | "Toggle tracing of redisplay.") | |
10385 | () | |
10386 | { | |
10387 | trace_redisplay_p = !trace_redisplay_p; | |
10388 | return Qnil; | |
10389 | } | |
10390 | ||
10391 | ||
10392 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 10393 | |
ca26e1c8 | 10394 | |
5f5c8ee5 GM |
10395 | \f |
10396 | /*********************************************************************** | |
10397 | Building Desired Matrix Rows | |
10398 | ***********************************************************************/ | |
a2889657 | 10399 | |
5f5c8ee5 GM |
10400 | /* Return a temporary glyph row holding the glyphs of an overlay |
10401 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 10402 | |
5f5c8ee5 GM |
10403 | static struct glyph_row * |
10404 | get_overlay_arrow_glyph_row (w) | |
10405 | struct window *w; | |
10406 | { | |
10407 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
10408 | struct buffer *buffer = XBUFFER (w->buffer); | |
10409 | struct buffer *old = current_buffer; | |
10410 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
10411 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
10412 | unsigned char *arrow_end = arrow_string + arrow_len; | |
10413 | unsigned char *p; | |
10414 | struct it it; | |
10415 | int multibyte_p; | |
10416 | int n_glyphs_before; | |
10417 | ||
10418 | set_buffer_temp (buffer); | |
10419 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
10420 | it.glyph_row->used[TEXT_AREA] = 0; | |
10421 | SET_TEXT_POS (it.position, 0, 0); | |
10422 | ||
10423 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
10424 | p = arrow_string; | |
10425 | while (p < arrow_end) | |
10426 | { | |
10427 | Lisp_Object face, ilisp; | |
10428 | ||
10429 | /* Get the next character. */ | |
10430 | if (multibyte_p) | |
4fdb80f2 | 10431 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
10432 | else |
10433 | it.c = *p, it.len = 1; | |
10434 | p += it.len; | |
10435 | ||
10436 | /* Get its face. */ | |
10437 | XSETFASTINT (ilisp, p - arrow_string); | |
10438 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
10439 | it.face_id = compute_char_face (f, it.c, face); | |
10440 | ||
10441 | /* Compute its width, get its glyphs. */ | |
10442 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 10443 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
10444 | PRODUCE_GLYPHS (&it); |
10445 | ||
10446 | /* If this character doesn't fit any more in the line, we have | |
10447 | to remove some glyphs. */ | |
10448 | if (it.current_x > it.last_visible_x) | |
10449 | { | |
10450 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
10451 | break; | |
10452 | } | |
10453 | } | |
10454 | ||
10455 | set_buffer_temp (old); | |
10456 | return it.glyph_row; | |
10457 | } | |
ca26e1c8 | 10458 | |
b0a0fbda | 10459 | |
5f5c8ee5 GM |
10460 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
10461 | glyphs are only inserted for terminal frames since we can't really | |
10462 | win with truncation glyphs when partially visible glyphs are | |
10463 | involved. Which glyphs to insert is determined by | |
10464 | produce_special_glyphs. */ | |
67481ae5 | 10465 | |
5f5c8ee5 GM |
10466 | static void |
10467 | insert_left_trunc_glyphs (it) | |
10468 | struct it *it; | |
10469 | { | |
10470 | struct it truncate_it; | |
10471 | struct glyph *from, *end, *to, *toend; | |
10472 | ||
10473 | xassert (!FRAME_WINDOW_P (it->f)); | |
10474 | ||
10475 | /* Get the truncation glyphs. */ | |
10476 | truncate_it = *it; | |
10477 | truncate_it.charset = -1; | |
10478 | truncate_it.current_x = 0; | |
10479 | truncate_it.face_id = DEFAULT_FACE_ID; | |
10480 | truncate_it.glyph_row = &scratch_glyph_row; | |
10481 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
10482 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
10483 | truncate_it.object = 0; | |
10484 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); | |
10485 | ||
10486 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
10487 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
10488 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
10489 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
10490 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
10491 | ||
10492 | while (from < end) | |
10493 | *to++ = *from++; | |
10494 | ||
10495 | /* There may be padding glyphs left over. Remove them. */ | |
10496 | from = to; | |
10497 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
10498 | ++from; | |
10499 | while (from < toend) | |
10500 | *to++ = *from++; | |
10501 | ||
10502 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
10503 | } | |
e0bfbde6 | 10504 | |
e0bfbde6 | 10505 | |
5f5c8ee5 | 10506 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 10507 | |
5f5c8ee5 GM |
10508 | Most of the time, ascent and height of a display line will be equal |
10509 | to the max_ascent and max_height values of the display iterator | |
10510 | structure. This is not the case if | |
67481ae5 | 10511 | |
5f5c8ee5 GM |
10512 | 1. We hit ZV without displaying anything. In this case, max_ascent |
10513 | and max_height will be zero. | |
1c9241f5 | 10514 | |
5f5c8ee5 GM |
10515 | 2. We have some glyphs that don't contribute to the line height. |
10516 | (The glyph row flag contributes_to_line_height_p is for future | |
10517 | pixmap extensions). | |
f6fd109b | 10518 | |
5f5c8ee5 GM |
10519 | The first case is easily covered by using default values because in |
10520 | these cases, the line height does not really matter, except that it | |
10521 | must not be zero. */ | |
67481ae5 | 10522 | |
5f5c8ee5 GM |
10523 | static void |
10524 | compute_line_metrics (it) | |
10525 | struct it *it; | |
10526 | { | |
10527 | struct glyph_row *row = it->glyph_row; | |
10528 | int area, i; | |
1c2250c2 | 10529 | |
5f5c8ee5 GM |
10530 | if (FRAME_WINDOW_P (it->f)) |
10531 | { | |
10532 | int i, top_line_height; | |
1c2250c2 | 10533 | |
5f5c8ee5 GM |
10534 | /* The line may consist of one space only, that was added to |
10535 | place the cursor on it. If so, the row's height hasn't been | |
10536 | computed yet. */ | |
10537 | if (row->height == 0) | |
10538 | { | |
10539 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 10540 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
10541 | row->ascent = it->max_ascent; |
10542 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10543 | row->phys_ascent = it->max_phys_ascent; |
10544 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10545 | } |
10546 | ||
10547 | /* Compute the width of this line. */ | |
10548 | row->pixel_width = row->x; | |
10549 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
10550 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
10551 | ||
10552 | xassert (row->pixel_width >= 0); | |
10553 | xassert (row->ascent >= 0 && row->height > 0); | |
10554 | ||
312246d1 GM |
10555 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
10556 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
10557 | ||
10558 | /* If first line's physical ascent is larger than its logical | |
10559 | ascent, use the physical ascent, and make the row taller. | |
10560 | This makes accented characters fully visible. */ | |
10561 | if (row == it->w->desired_matrix->rows | |
10562 | && row->phys_ascent > row->ascent) | |
10563 | { | |
10564 | row->height += row->phys_ascent - row->ascent; | |
10565 | row->ascent = row->phys_ascent; | |
10566 | } | |
10567 | ||
5f5c8ee5 GM |
10568 | /* Compute how much of the line is visible. */ |
10569 | row->visible_height = row->height; | |
10570 | ||
10571 | top_line_height = WINDOW_DISPLAY_TOP_LINE_HEIGHT (it->w); | |
10572 | if (row->y < top_line_height) | |
10573 | row->visible_height -= top_line_height - row->y; | |
10574 | else | |
10575 | { | |
10576 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
10577 | if (row->y + row->height > max_y) | |
10578 | row->visible_height -= row->y + row->height - max_y; | |
10579 | } | |
10580 | } | |
10581 | else | |
10582 | { | |
10583 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
10584 | row->ascent = row->phys_ascent = 0; |
10585 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 10586 | } |
67481ae5 | 10587 | |
5f5c8ee5 GM |
10588 | /* Compute a hash code for this row. */ |
10589 | row->hash = 0; | |
10590 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
10591 | for (i = 0; i < row->used[area]; ++i) | |
10592 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
10593 | + row->glyphs[area][i].u.val | |
10594 | + (row->glyphs[area][i].type << 2)); | |
a2889657 | 10595 | |
5f5c8ee5 | 10596 | it->max_ascent = it->max_descent = 0; |
312246d1 | 10597 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 10598 | } |
12adba34 | 10599 | |
ca26e1c8 | 10600 | |
5f5c8ee5 GM |
10601 | /* Append one space to the glyph row of iterator IT if doing a |
10602 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
10603 | space have the default face, otherwise let it have the same face as | |
c6e89d6c GM |
10604 | IT->face_id. |
10605 | ||
10606 | This function is called to make sure that there is always one glyph | |
10607 | at the end of a glyph row that the cursor can be set on under | |
10608 | window-systems. (If there weren't such a glyph we would not know | |
10609 | how wide and tall a box cursor should be displayed). | |
10610 | ||
10611 | At the same time this space let's a nicely handle clearing to the | |
10612 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 10613 | |
5f5c8ee5 GM |
10614 | static void |
10615 | append_space (it, default_face_p) | |
10616 | struct it *it; | |
10617 | int default_face_p; | |
10618 | { | |
10619 | if (FRAME_WINDOW_P (it->f)) | |
10620 | { | |
10621 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 10622 | |
5f5c8ee5 GM |
10623 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
10624 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 10625 | { |
5f5c8ee5 GM |
10626 | /* Save some values that must not be changed. */ |
10627 | int saved_x = it->current_x; | |
10628 | struct text_pos saved_pos; | |
10629 | int saved_what = it->what; | |
10630 | int saved_face_id = it->face_id; | |
10631 | int saved_charset = it->charset; | |
10632 | Lisp_Object saved_object; | |
10633 | ||
10634 | saved_object = it->object; | |
10635 | saved_pos = it->position; | |
10636 | ||
10637 | it->what = IT_CHARACTER; | |
10638 | bzero (&it->position, sizeof it->position); | |
10639 | it->object = 0; | |
10640 | it->c = ' '; | |
10641 | it->len = 1; | |
10642 | it->charset = CHARSET_ASCII; | |
10643 | ||
10644 | if (default_face_p) | |
10645 | it->face_id = DEFAULT_FACE_ID; | |
10646 | if (it->multibyte_p) | |
10647 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, CHARSET_ASCII); | |
10648 | else | |
10649 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, -1); | |
1842fc1a | 10650 | |
5f5c8ee5 GM |
10651 | PRODUCE_GLYPHS (it); |
10652 | ||
10653 | it->current_x = saved_x; | |
10654 | it->object = saved_object; | |
10655 | it->position = saved_pos; | |
10656 | it->what = saved_what; | |
10657 | it->face_id = saved_face_id; | |
10658 | it->charset = saved_charset; | |
10659 | } | |
10660 | } | |
10661 | } | |
12adba34 | 10662 | |
1842fc1a | 10663 | |
5f5c8ee5 GM |
10664 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
10665 | to the end of the display line. Called from display_line. | |
10666 | If the glyph row is empty, add a space glyph to it so that we | |
10667 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
10668 | ||
10669 | static void | |
10670 | extend_face_to_end_of_line (it) | |
10671 | struct it *it; | |
10672 | { | |
10673 | struct face *face; | |
10674 | struct frame *f = it->f; | |
1842fc1a | 10675 | |
5f5c8ee5 GM |
10676 | /* If line is already filled, do nothing. */ |
10677 | if (it->current_x >= it->last_visible_x) | |
10678 | return; | |
10679 | ||
10680 | /* Face extension extends the background and box of IT->face_id | |
10681 | to the end of the line. If the background equals the background | |
10682 | of the frame, we haven't to do anything. */ | |
10683 | face = FACE_FROM_ID (f, it->face_id); | |
10684 | if (FRAME_WINDOW_P (f) | |
10685 | && face->box == FACE_NO_BOX | |
10686 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
10687 | && !face->stipple) | |
10688 | return; | |
1842fc1a | 10689 | |
5f5c8ee5 GM |
10690 | /* Set the glyph row flag indicating that the face of the last glyph |
10691 | in the text area has to be drawn to the end of the text area. */ | |
10692 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 10693 | |
5f5c8ee5 GM |
10694 | /* If current charset of IT is not ASCII, make sure we have the |
10695 | ASCII face. This will be automatically undone the next time | |
10696 | get_next_display_element returns a character from a different | |
10697 | charset. Note that the charset will always be ASCII in unibyte | |
10698 | text. */ | |
10699 | if (it->charset != CHARSET_ASCII) | |
10700 | { | |
10701 | it->charset = CHARSET_ASCII; | |
10702 | it->face_id = FACE_FOR_CHARSET (f, it->face_id, CHARSET_ASCII); | |
10703 | } | |
545e04f6 | 10704 | |
5f5c8ee5 GM |
10705 | if (FRAME_WINDOW_P (f)) |
10706 | { | |
10707 | /* If the row is empty, add a space with the current face of IT, | |
10708 | so that we know which face to draw. */ | |
10709 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 10710 | { |
5f5c8ee5 GM |
10711 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
10712 | it->glyph_row->glyphs[TEXT_AREA][0].u.ch.face_id = it->face_id; | |
10713 | it->glyph_row->used[TEXT_AREA] = 1; | |
a2889657 | 10714 | } |
5f5c8ee5 GM |
10715 | } |
10716 | else | |
10717 | { | |
10718 | /* Save some values that must not be changed. */ | |
10719 | int saved_x = it->current_x; | |
10720 | struct text_pos saved_pos; | |
10721 | Lisp_Object saved_object; | |
10722 | int saved_what = it->what; | |
10723 | ||
10724 | saved_object = it->object; | |
10725 | saved_pos = it->position; | |
10726 | ||
10727 | it->what = IT_CHARACTER; | |
10728 | bzero (&it->position, sizeof it->position); | |
10729 | it->object = 0; | |
10730 | it->c = ' '; | |
10731 | it->len = 1; | |
10732 | ||
10733 | PRODUCE_GLYPHS (it); | |
10734 | ||
10735 | while (it->current_x <= it->last_visible_x) | |
10736 | PRODUCE_GLYPHS (it); | |
10737 | ||
10738 | /* Don't count these blanks really. It would let us insert a left | |
10739 | truncation glyph below and make us set the cursor on them, maybe. */ | |
10740 | it->current_x = saved_x; | |
10741 | it->object = saved_object; | |
10742 | it->position = saved_pos; | |
10743 | it->what = saved_what; | |
10744 | } | |
10745 | } | |
12adba34 | 10746 | |
545e04f6 | 10747 | |
5f5c8ee5 GM |
10748 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
10749 | trailing whitespace. */ | |
1c9241f5 | 10750 | |
5f5c8ee5 GM |
10751 | static int |
10752 | trailing_whitespace_p (charpos) | |
10753 | int charpos; | |
10754 | { | |
10755 | int bytepos = CHAR_TO_BYTE (charpos); | |
10756 | int c = 0; | |
7bbe686f | 10757 | |
5f5c8ee5 GM |
10758 | while (bytepos < ZV_BYTE |
10759 | && (c = FETCH_CHAR (bytepos), | |
10760 | c == ' ' || c == '\t')) | |
10761 | ++bytepos; | |
0d09d1e6 | 10762 | |
8f897821 GM |
10763 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
10764 | { | |
10765 | if (bytepos != PT_BYTE) | |
10766 | return 1; | |
10767 | } | |
10768 | return 0; | |
5f5c8ee5 | 10769 | } |
31b24551 | 10770 | |
545e04f6 | 10771 | |
5f5c8ee5 | 10772 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 10773 | |
5f5c8ee5 GM |
10774 | void |
10775 | highlight_trailing_whitespace (f, row) | |
10776 | struct frame *f; | |
10777 | struct glyph_row *row; | |
10778 | { | |
10779 | int used = row->used[TEXT_AREA]; | |
10780 | ||
10781 | if (used) | |
10782 | { | |
10783 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
10784 | struct glyph *glyph = start + used - 1; | |
10785 | ||
10786 | /* Skip over the space glyph inserted to display the | |
10787 | cursor at the end of a line. */ | |
10788 | if (glyph->type == CHAR_GLYPH | |
10789 | && glyph->u.ch.code == ' ' | |
10790 | && glyph->object == 0) | |
10791 | --glyph; | |
10792 | ||
10793 | /* If last glyph is a space or stretch, and it's trailing | |
10794 | whitespace, set the face of all trailing whitespace glyphs in | |
10795 | IT->glyph_row to `trailing-whitespace'. */ | |
10796 | if (glyph >= start | |
10797 | && BUFFERP (glyph->object) | |
10798 | && (glyph->type == STRETCH_GLYPH | |
10799 | || (glyph->type == CHAR_GLYPH | |
10800 | && glyph->u.ch.code == ' ')) | |
10801 | && trailing_whitespace_p (glyph->charpos)) | |
545e04f6 | 10802 | { |
5f5c8ee5 GM |
10803 | int face_id = lookup_named_face (f, Qtrailing_whitespace, |
10804 | CHARSET_ASCII); | |
10805 | ||
10806 | while (glyph >= start | |
10807 | && BUFFERP (glyph->object) | |
10808 | && (glyph->type == STRETCH_GLYPH | |
10809 | || (glyph->type == CHAR_GLYPH | |
10810 | && glyph->u.ch.code == ' '))) | |
545e04f6 | 10811 | { |
5f5c8ee5 GM |
10812 | if (glyph->type == STRETCH_GLYPH) |
10813 | glyph->u.stretch.face_id = face_id; | |
10814 | else | |
10815 | glyph->u.ch.face_id = face_id; | |
10816 | --glyph; | |
545e04f6 KH |
10817 | } |
10818 | } | |
a2889657 | 10819 | } |
5f5c8ee5 | 10820 | } |
a2889657 | 10821 | |
5fcbb24d | 10822 | |
5f5c8ee5 GM |
10823 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
10824 | IT->w from text at the current position of IT. See dispextern.h | |
10825 | for an overview of struct it. Value is non-zero if | |
10826 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
10827 | only. */ | |
10828 | ||
10829 | static int | |
10830 | display_line (it) | |
10831 | struct it *it; | |
10832 | { | |
10833 | struct glyph_row *row = it->glyph_row; | |
10834 | ||
10835 | /* We always start displaying at hpos zero even if hscrolled. */ | |
10836 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 10837 | |
5f5c8ee5 GM |
10838 | /* We must not display in a row that's not a text row. */ |
10839 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
10840 | < it->w->desired_matrix->nrows); | |
12adba34 | 10841 | |
5f5c8ee5 GM |
10842 | /* Is IT->w showing the region? */ |
10843 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 10844 | |
5f5c8ee5 GM |
10845 | /* Clear the result glyph row and enable it. */ |
10846 | prepare_desired_row (row); | |
12adba34 | 10847 | |
5f5c8ee5 GM |
10848 | row->y = it->current_y; |
10849 | row->start = it->current; | |
10850 | row->continuation_lines_width = it->continuation_lines_width; | |
10851 | row->displays_text_p = 1; | |
10852 | ||
10853 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
10854 | display_line on only one line at a time, in which case this | |
10855 | can't really hurt too much, or we call it on lines which appear | |
10856 | one after another in the buffer, in which case all calls to | |
10857 | recenter_overlay_lists but the first will be pretty cheap. */ | |
10858 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
10859 | ||
5f5c8ee5 GM |
10860 | /* Move over display elements that are not visible because we are |
10861 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
10862 | if the first glyph is partially visible or if we hit a line end. */ | |
10863 | if (it->current_x < it->first_visible_x) | |
10864 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
10865 | MOVE_TO_POS | MOVE_TO_X); | |
10866 | ||
10867 | /* Get the initial row height. This is either the height of the | |
10868 | text hscrolled, if there is any, or zero. */ | |
10869 | row->ascent = it->max_ascent; | |
10870 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10871 | row->phys_ascent = it->max_phys_ascent; |
10872 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10873 | |
10874 | /* Loop generating characters. The loop is left with IT on the next | |
10875 | character to display. */ | |
10876 | while (1) | |
10877 | { | |
10878 | int n_glyphs_before, hpos_before, x_before; | |
10879 | int x, i, nglyphs; | |
10880 | ||
10881 | /* Retrieve the next thing to display. Value is zero if end of | |
10882 | buffer reached. */ | |
10883 | if (!get_next_display_element (it)) | |
10884 | { | |
10885 | /* Maybe add a space at the end of this line that is used to | |
10886 | display the cursor there under X. */ | |
10887 | append_space (it, 1); | |
10888 | ||
10889 | /* The position -1 below indicates a blank line not | |
10890 | corresponding to any text, as opposed to an empty line | |
10891 | corresponding to a line end. */ | |
10892 | if (row->used[TEXT_AREA] <= 1) | |
a2889657 | 10893 | { |
5f5c8ee5 GM |
10894 | row->glyphs[TEXT_AREA]->charpos = -1; |
10895 | row->displays_text_p = 0; | |
10896 | ||
10897 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
10898 | row->indicate_empty_line_p = 1; | |
a2889657 | 10899 | } |
5f5c8ee5 GM |
10900 | |
10901 | it->continuation_lines_width = 0; | |
10902 | row->ends_at_zv_p = 1; | |
10903 | break; | |
a2889657 | 10904 | } |
a2889657 | 10905 | |
5f5c8ee5 GM |
10906 | /* Now, get the metrics of what we want to display. This also |
10907 | generates glyphs in `row' (which is IT->glyph_row). */ | |
10908 | n_glyphs_before = row->used[TEXT_AREA]; | |
10909 | x = it->current_x; | |
10910 | PRODUCE_GLYPHS (it); | |
a2889657 | 10911 | |
5f5c8ee5 GM |
10912 | /* If this display element was in marginal areas, continue with |
10913 | the next one. */ | |
10914 | if (it->area != TEXT_AREA) | |
a2889657 | 10915 | { |
5f5c8ee5 GM |
10916 | row->ascent = max (row->ascent, it->max_ascent); |
10917 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10918 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10919 | row->phys_height = max (row->phys_height, | |
10920 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10921 | set_iterator_to_next (it); |
10922 | continue; | |
10923 | } | |
5936754e | 10924 | |
5f5c8ee5 GM |
10925 | /* Does the display element fit on the line? If we truncate |
10926 | lines, we should draw past the right edge of the window. If | |
10927 | we don't truncate, we want to stop so that we can display the | |
10928 | continuation glyph before the right margin. If lines are | |
10929 | continued, there are two possible strategies for characters | |
10930 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
10931 | glyphs as possible in this line and leave the rest for the | |
10932 | continuation line, or display the whole element in the next | |
10933 | line. Original redisplay did the former, so we do it also. */ | |
10934 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
10935 | hpos_before = it->hpos; | |
10936 | x_before = x; | |
10937 | ||
10938 | if (nglyphs == 1 | |
10939 | && it->current_x < it->last_visible_x) | |
10940 | { | |
10941 | ++it->hpos; | |
10942 | row->ascent = max (row->ascent, it->max_ascent); | |
10943 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
10944 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
10945 | row->phys_height = max (row->phys_height, | |
10946 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
10947 | if (it->current_x - it->pixel_width < it->first_visible_x) |
10948 | row->x = x - it->first_visible_x; | |
10949 | } | |
10950 | else | |
10951 | { | |
10952 | int new_x; | |
10953 | struct glyph *glyph; | |
10954 | ||
10955 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 10956 | { |
5f5c8ee5 GM |
10957 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
10958 | new_x = x + glyph->pixel_width; | |
10959 | ||
10960 | if (/* Lines are continued. */ | |
10961 | !it->truncate_lines_p | |
10962 | && (/* Glyph doesn't fit on the line. */ | |
10963 | new_x > it->last_visible_x | |
10964 | /* Or it fits exactly on a window system frame. */ | |
10965 | || (new_x == it->last_visible_x | |
10966 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 10967 | { |
5f5c8ee5 GM |
10968 | /* End of a continued line. */ |
10969 | ||
10970 | if (it->hpos == 0 | |
10971 | || (new_x == it->last_visible_x | |
10972 | && FRAME_WINDOW_P (it->f))) | |
10973 | { | |
10974 | /* Current glyph fits exactly on the line. We | |
10975 | must continue the line because we can't draw | |
10976 | the cursor after the glyph. */ | |
10977 | row->continued_p = 1; | |
10978 | it->current_x = new_x; | |
10979 | it->continuation_lines_width += new_x; | |
10980 | ++it->hpos; | |
10981 | if (i == nglyphs - 1) | |
10982 | set_iterator_to_next (it); | |
10983 | } | |
10984 | else | |
5936754e | 10985 | { |
5f5c8ee5 GM |
10986 | /* Display element draws past the right edge of |
10987 | the window. Restore positions to values | |
10988 | before the element. The next line starts | |
10989 | with current_x before the glyph that could | |
10990 | not be displayed, so that TAB works right. */ | |
10991 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
10992 | ||
10993 | /* Display continuation glyphs. */ | |
10994 | if (!FRAME_WINDOW_P (it->f)) | |
10995 | produce_special_glyphs (it, IT_CONTINUATION); | |
10996 | row->continued_p = 1; | |
10997 | ||
10998 | it->current_x = x; | |
10999 | it->continuation_lines_width += x; | |
5936754e | 11000 | } |
5f5c8ee5 GM |
11001 | break; |
11002 | } | |
11003 | else if (new_x > it->first_visible_x) | |
11004 | { | |
11005 | /* Increment number of glyphs actually displayed. */ | |
11006 | ++it->hpos; | |
11007 | ||
11008 | if (x < it->first_visible_x) | |
11009 | /* Glyph is partially visible, i.e. row starts at | |
11010 | negative X position. */ | |
11011 | row->x = x - it->first_visible_x; | |
11012 | } | |
11013 | else | |
11014 | { | |
11015 | /* Glyph is completely off the left margin of the | |
11016 | window. This should not happen because of the | |
11017 | move_it_in_display_line at the start of | |
11018 | this function. */ | |
11019 | abort (); | |
a2889657 | 11020 | } |
a2889657 | 11021 | } |
5f5c8ee5 GM |
11022 | |
11023 | row->ascent = max (row->ascent, it->max_ascent); | |
11024 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11025 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11026 | row->phys_height = max (row->phys_height, | |
11027 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11028 | |
11029 | /* End of this display line if row is continued. */ | |
11030 | if (row->continued_p) | |
11031 | break; | |
a2889657 | 11032 | } |
a2889657 | 11033 | |
5f5c8ee5 GM |
11034 | /* Is this a line end? If yes, we're also done, after making |
11035 | sure that a non-default face is extended up to the right | |
11036 | margin of the window. */ | |
11037 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 11038 | { |
5f5c8ee5 GM |
11039 | int used_before = row->used[TEXT_AREA]; |
11040 | ||
11041 | /* Add a space at the end of the line that is used to | |
11042 | display the cursor there. */ | |
11043 | append_space (it, 0); | |
11044 | ||
11045 | /* Extend the face to the end of the line. */ | |
11046 | extend_face_to_end_of_line (it); | |
11047 | ||
11048 | /* Make sure we have the position. */ | |
11049 | if (used_before == 0) | |
11050 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
11051 | ||
11052 | /* Consume the line end. This skips over invisible lines. */ | |
11053 | set_iterator_to_next (it); | |
11054 | it->continuation_lines_width = 0; | |
11055 | break; | |
1c9241f5 | 11056 | } |
a2889657 | 11057 | |
5f5c8ee5 GM |
11058 | /* Proceed with next display element. Note that this skips |
11059 | over lines invisible because of selective display. */ | |
11060 | set_iterator_to_next (it); | |
b1d1124b | 11061 | |
5f5c8ee5 GM |
11062 | /* If we truncate lines, we are done when the last displayed |
11063 | glyphs reach past the right margin of the window. */ | |
11064 | if (it->truncate_lines_p | |
11065 | && (FRAME_WINDOW_P (it->f) | |
11066 | ? (it->current_x >= it->last_visible_x) | |
11067 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 11068 | { |
5f5c8ee5 GM |
11069 | /* Maybe add truncation glyphs. */ |
11070 | if (!FRAME_WINDOW_P (it->f)) | |
11071 | { | |
11072 | --it->glyph_row->used[TEXT_AREA]; | |
11073 | produce_special_glyphs (it, IT_TRUNCATION); | |
11074 | } | |
11075 | ||
11076 | row->truncated_on_right_p = 1; | |
11077 | it->continuation_lines_width = 0; | |
312246d1 | 11078 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
11079 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
11080 | it->hpos = hpos_before; | |
11081 | it->current_x = x_before; | |
11082 | break; | |
75d13c64 | 11083 | } |
a2889657 | 11084 | } |
a2889657 | 11085 | |
5f5c8ee5 GM |
11086 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
11087 | at the left window margin. */ | |
11088 | if (it->first_visible_x | |
11089 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
11090 | { | |
11091 | if (!FRAME_WINDOW_P (it->f)) | |
11092 | insert_left_trunc_glyphs (it); | |
11093 | row->truncated_on_left_p = 1; | |
11094 | } | |
a2889657 | 11095 | |
5f5c8ee5 GM |
11096 | /* If the start of this line is the overlay arrow-position, then |
11097 | mark this glyph row as the one containing the overlay arrow. | |
11098 | This is clearly a mess with variable size fonts. It would be | |
11099 | better to let it be displayed like cursors under X. */ | |
e24c997d | 11100 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 11101 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
11102 | && (MATRIX_ROW_START_CHARPOS (row) |
11103 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 11104 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
11105 | && ! overlay_arrow_seen) |
11106 | { | |
5f5c8ee5 GM |
11107 | /* Overlay arrow in window redisplay is a bitmap. */ |
11108 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 11109 | { |
5f5c8ee5 GM |
11110 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
11111 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
11112 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
11113 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
11114 | struct glyph *p2, *end; | |
11115 | ||
11116 | /* Copy the arrow glyphs. */ | |
11117 | while (glyph < arrow_end) | |
11118 | *p++ = *glyph++; | |
11119 | ||
11120 | /* Throw away padding glyphs. */ | |
11121 | p2 = p; | |
11122 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
11123 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
11124 | ++p2; | |
11125 | if (p2 > p) | |
212e4f87 | 11126 | { |
5f5c8ee5 GM |
11127 | while (p2 < end) |
11128 | *p++ = *p2++; | |
11129 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 11130 | } |
c4628384 | 11131 | } |
5f5c8ee5 | 11132 | |
a2889657 | 11133 | overlay_arrow_seen = 1; |
5f5c8ee5 | 11134 | row->overlay_arrow_p = 1; |
a2889657 JB |
11135 | } |
11136 | ||
5f5c8ee5 GM |
11137 | /* Compute pixel dimensions of this line. */ |
11138 | compute_line_metrics (it); | |
11139 | ||
11140 | /* Remember the position at which this line ends. */ | |
11141 | row->end = it->current; | |
11142 | ||
11143 | /* Maybe set the cursor. If you change this, it's probably a good | |
11144 | idea to also change the code in redisplay_window for cursor | |
11145 | movement in an unchanged window. */ | |
11146 | if (it->w->cursor.vpos < 0 | |
11147 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
11148 | && MATRIX_ROW_END_CHARPOS (row) >= PT | |
11149 | && !(MATRIX_ROW_END_CHARPOS (row) == PT | |
11150 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
11151 | || !row->ends_at_zv_p))) | |
11152 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
11153 | ||
11154 | /* Highlight trailing whitespace. */ | |
8f897821 | 11155 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
11156 | highlight_trailing_whitespace (it->f, it->glyph_row); |
11157 | ||
11158 | /* Prepare for the next line. This line starts horizontally at (X | |
11159 | HPOS) = (0 0). Vertical positions are incremented. As a | |
11160 | convenience for the caller, IT->glyph_row is set to the next | |
11161 | row to be used. */ | |
11162 | it->current_x = it->hpos = 0; | |
11163 | it->current_y += row->height; | |
11164 | ++it->vpos; | |
11165 | ++it->glyph_row; | |
11166 | return row->displays_text_p; | |
a2889657 | 11167 | } |
5f5c8ee5 GM |
11168 | |
11169 | ||
a2889657 | 11170 | \f |
5f5c8ee5 GM |
11171 | /*********************************************************************** |
11172 | Menu Bar | |
11173 | ***********************************************************************/ | |
11174 | ||
11175 | /* Redisplay the menu bar in the frame for window W. | |
11176 | ||
11177 | The menu bar of X frames that don't have X toolkit support is | |
11178 | displayed in a special window W->frame->menu_bar_window. | |
11179 | ||
11180 | The menu bar of terminal frames is treated specially as far as | |
11181 | glyph matrices are concerned. Menu bar lines are not part of | |
11182 | windows, so the update is done directly on the frame matrix rows | |
11183 | for the menu bar. */ | |
7ce2c095 RS |
11184 | |
11185 | static void | |
11186 | display_menu_bar (w) | |
11187 | struct window *w; | |
11188 | { | |
5f5c8ee5 GM |
11189 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11190 | struct it it; | |
11191 | Lisp_Object items; | |
8351baf2 | 11192 | int i; |
7ce2c095 | 11193 | |
5f5c8ee5 | 11194 | /* Don't do all this for graphical frames. */ |
dc937613 | 11195 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
11196 | if (!NILP (Vwindow_system)) |
11197 | return; | |
dc937613 | 11198 | #endif |
dc937613 | 11199 | #ifdef USE_X_TOOLKIT |
d3413a53 | 11200 | if (FRAME_X_P (f)) |
7ce2c095 | 11201 | return; |
5f5c8ee5 GM |
11202 | #endif |
11203 | ||
11204 | #ifdef USE_X_TOOLKIT | |
11205 | xassert (!FRAME_WINDOW_P (f)); | |
11206 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MODE_LINE_FACE_ID); | |
11207 | it.first_visible_x = 0; | |
11208 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11209 | #else /* not USE_X_TOOLKIT */ | |
11210 | if (FRAME_WINDOW_P (f)) | |
11211 | { | |
11212 | /* Menu bar lines are displayed in the desired matrix of the | |
11213 | dummy window menu_bar_window. */ | |
11214 | struct window *menu_w; | |
11215 | xassert (WINDOWP (f->menu_bar_window)); | |
11216 | menu_w = XWINDOW (f->menu_bar_window); | |
11217 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
11218 | MODE_LINE_FACE_ID); | |
11219 | it.first_visible_x = 0; | |
11220 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11221 | } | |
11222 | else | |
11223 | { | |
11224 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
11225 | pixel x/y. */ | |
11226 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
11227 | MODE_LINE_FACE_ID); | |
11228 | it.first_visible_x = 0; | |
11229 | it.last_visible_x = FRAME_WIDTH (f); | |
11230 | } | |
11231 | #endif /* not USE_X_TOOLKIT */ | |
11232 | ||
11233 | /* Clear all rows of the menu bar. */ | |
11234 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
11235 | { | |
11236 | struct glyph_row *row = it.glyph_row + i; | |
11237 | clear_glyph_row (row); | |
11238 | row->enabled_p = 1; | |
11239 | row->full_width_p = 1; | |
11240 | } | |
7ce2c095 | 11241 | |
5f5c8ee5 GM |
11242 | /* Make the first line of the menu bar appear in reverse video. */ |
11243 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 11244 | |
5f5c8ee5 GM |
11245 | /* Display all items of the menu bar. */ |
11246 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 11247 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 11248 | { |
5f5c8ee5 GM |
11249 | Lisp_Object string; |
11250 | ||
11251 | /* Stop at nil string. */ | |
8351baf2 RS |
11252 | string = XVECTOR (items)->contents[i + 1]; |
11253 | if (NILP (string)) | |
11254 | break; | |
2d66ad19 | 11255 | |
5f5c8ee5 GM |
11256 | /* Remember where item was displayed. */ |
11257 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 11258 | |
5f5c8ee5 GM |
11259 | /* Display the item, pad with one space. */ |
11260 | if (it.current_x < it.last_visible_x) | |
11261 | display_string (NULL, string, Qnil, 0, 0, &it, | |
11262 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
11263 | } |
11264 | ||
2d66ad19 | 11265 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
11266 | if (it.current_x < it.last_visible_x) |
11267 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 11268 | |
5f5c8ee5 GM |
11269 | /* Compute the total height of the lines. */ |
11270 | compute_line_metrics (&it); | |
7ce2c095 | 11271 | } |
5f5c8ee5 GM |
11272 | |
11273 | ||
7ce2c095 | 11274 | \f |
5f5c8ee5 GM |
11275 | /*********************************************************************** |
11276 | Mode Line | |
11277 | ***********************************************************************/ | |
11278 | ||
11279 | /* Display the mode and/or top line of window W. */ | |
a2889657 JB |
11280 | |
11281 | static void | |
5f5c8ee5 | 11282 | display_mode_lines (w) |
a2889657 JB |
11283 | struct window *w; |
11284 | { | |
5f5c8ee5 | 11285 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 11286 | line_number_displayed = 0; |
155ef550 | 11287 | w->column_number_displayed = Qnil; |
aa6d10fa | 11288 | |
5f5c8ee5 GM |
11289 | if (WINDOW_WANTS_MODELINE_P (w)) |
11290 | display_mode_line (w, MODE_LINE_FACE_ID, current_buffer->mode_line_format); | |
11291 | ||
11292 | if (WINDOW_WANTS_TOP_LINE_P (w)) | |
11293 | display_mode_line (w, TOP_LINE_FACE_ID, current_buffer->top_line_format); | |
11294 | } | |
03b294dc | 11295 | |
03b294dc | 11296 | |
5f5c8ee5 GM |
11297 | /* Display mode or top line of window W. FACE_ID specifies which line |
11298 | to display; it is either MODE_LINE_FACE_ID or TOP_LINE_FACE_ID. | |
11299 | FORMAT is the mode line format to display. */ | |
03b294dc | 11300 | |
5f5c8ee5 GM |
11301 | static void |
11302 | display_mode_line (w, face_id, format) | |
11303 | struct window *w; | |
11304 | enum face_id face_id; | |
11305 | Lisp_Object format; | |
11306 | { | |
11307 | struct it it; | |
11308 | struct face *face; | |
03b294dc | 11309 | |
5f5c8ee5 GM |
11310 | init_iterator (&it, w, -1, -1, NULL, face_id); |
11311 | prepare_desired_row (it.glyph_row); | |
11312 | ||
11313 | /* Temporarily make frame's keyboard the current kboard so that | |
11314 | kboard-local variables in the mode_line_format will get the right | |
11315 | values. */ | |
11316 | push_frame_kboard (it.f); | |
11317 | display_mode_element (&it, 0, 0, 0, format); | |
11318 | pop_frame_kboard (); | |
a2889657 | 11319 | |
5f5c8ee5 GM |
11320 | /* Fill up with spaces. */ |
11321 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
11322 | ||
11323 | compute_line_metrics (&it); | |
11324 | it.glyph_row->full_width_p = 1; | |
11325 | it.glyph_row->mode_line_p = 1; | |
11326 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
11327 | it.glyph_row->continued_p = 0; | |
11328 | it.glyph_row->truncated_on_left_p = 0; | |
11329 | it.glyph_row->truncated_on_right_p = 0; | |
11330 | ||
11331 | /* Make a 3D mode-line have a shadow at its right end. */ | |
11332 | face = FACE_FROM_ID (it.f, face_id); | |
11333 | extend_face_to_end_of_line (&it); | |
11334 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 11335 | { |
5f5c8ee5 GM |
11336 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
11337 | + it.glyph_row->used[TEXT_AREA] - 1); | |
11338 | last->right_box_line_p = 1; | |
d7eb09a0 | 11339 | } |
a2889657 JB |
11340 | } |
11341 | ||
a2889657 | 11342 | |
5f5c8ee5 GM |
11343 | /* Contribute ELT to the mode line for window IT->w. How it |
11344 | translates into text depends on its data type. | |
a2889657 | 11345 | |
5f5c8ee5 | 11346 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
11347 | |
11348 | DEPTH is the depth in recursion. It is used to prevent | |
11349 | infinite recursion here. | |
11350 | ||
5f5c8ee5 GM |
11351 | FIELD_WIDTH is the number of characters the display of ELT should |
11352 | occupy in the mode line, and PRECISION is the maximum number of | |
11353 | characters to display from ELT's representation. See | |
11354 | display_string for details. * | |
a2889657 | 11355 | |
5f5c8ee5 | 11356 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
11357 | |
11358 | static int | |
5f5c8ee5 GM |
11359 | display_mode_element (it, depth, field_width, precision, elt) |
11360 | struct it *it; | |
a2889657 | 11361 | int depth; |
5f5c8ee5 GM |
11362 | int field_width, precision; |
11363 | Lisp_Object elt; | |
a2889657 | 11364 | { |
5f5c8ee5 GM |
11365 | int n = 0, field, prec; |
11366 | ||
a2889657 JB |
11367 | tail_recurse: |
11368 | if (depth > 10) | |
11369 | goto invalid; | |
11370 | ||
11371 | depth++; | |
11372 | ||
0220c518 | 11373 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
11374 | { |
11375 | case Lisp_String: | |
11376 | { | |
11377 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
11378 | unsigned char c; |
11379 | unsigned char *this = XSTRING (elt)->data; | |
11380 | unsigned char *lisp_string = this; | |
11381 | ||
11382 | while ((precision <= 0 || n < precision) | |
11383 | && *this | |
11384 | && (frame_title_ptr | |
11385 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
11386 | { |
11387 | unsigned char *last = this; | |
5f5c8ee5 GM |
11388 | |
11389 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
11390 | while ((c = *this++) != '\0' && c != '%') |
11391 | ; | |
5f5c8ee5 | 11392 | |
a2889657 JB |
11393 | if (this - 1 != last) |
11394 | { | |
5f5c8ee5 GM |
11395 | /* Output to end of string or up to '%'. Field width |
11396 | is length of string. Don't output more than | |
11397 | PRECISION allows us. */ | |
11398 | prec = --this - last; | |
11399 | if (precision > 0 && prec > precision - n) | |
11400 | prec = precision - n; | |
11401 | ||
d39b6696 | 11402 | if (frame_title_ptr) |
5f5c8ee5 | 11403 | n += store_frame_title (last, prec, prec); |
d39b6696 | 11404 | else |
5f5c8ee5 GM |
11405 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
11406 | it, 0, prec, 0, -1); | |
a2889657 JB |
11407 | } |
11408 | else /* c == '%' */ | |
11409 | { | |
5f5c8ee5 GM |
11410 | unsigned char *percent_position = this; |
11411 | ||
11412 | /* Get the specified minimum width. Zero means | |
11413 | don't pad. */ | |
11414 | field = 0; | |
a2889657 | 11415 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 11416 | field = field * 10 + c - '0'; |
a2889657 | 11417 | |
5f5c8ee5 GM |
11418 | /* Don't pad beyond the total padding allowed. */ |
11419 | if (field_width - n > 0 && field > field_width - n) | |
11420 | field = field_width - n; | |
a2889657 | 11421 | |
5f5c8ee5 GM |
11422 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
11423 | prec = precision - n; | |
11424 | ||
a2889657 | 11425 | if (c == 'M') |
5f5c8ee5 GM |
11426 | n += display_mode_element (it, depth, field, prec, |
11427 | Vglobal_mode_string); | |
a2889657 | 11428 | else if (c != 0) |
d39b6696 | 11429 | { |
5f5c8ee5 GM |
11430 | unsigned char *spec |
11431 | = decode_mode_spec (it->w, c, field, prec); | |
11432 | ||
d39b6696 | 11433 | if (frame_title_ptr) |
5f5c8ee5 | 11434 | n += store_frame_title (spec, field, prec); |
d39b6696 | 11435 | else |
5f5c8ee5 GM |
11436 | { |
11437 | int nglyphs_before | |
11438 | = it->glyph_row->used[TEXT_AREA]; | |
11439 | int charpos | |
11440 | = percent_position - XSTRING (elt)->data; | |
11441 | int nwritten | |
11442 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
11443 | field, prec, 0, -1); | |
11444 | ||
11445 | /* Assign to the glyphs written above the | |
11446 | string where the `%x' came from, position | |
11447 | of the `%'. */ | |
11448 | if (nwritten > 0) | |
11449 | { | |
11450 | struct glyph *glyph | |
11451 | = (it->glyph_row->glyphs[TEXT_AREA] | |
11452 | + nglyphs_before); | |
11453 | int i; | |
11454 | ||
11455 | for (i = 0; i < nwritten; ++i) | |
11456 | { | |
11457 | glyph[i].object = elt; | |
11458 | glyph[i].charpos = charpos; | |
11459 | } | |
11460 | ||
11461 | n += nwritten; | |
11462 | } | |
11463 | } | |
d39b6696 | 11464 | } |
a2889657 JB |
11465 | } |
11466 | } | |
11467 | } | |
11468 | break; | |
11469 | ||
11470 | case Lisp_Symbol: | |
11471 | /* A symbol: process the value of the symbol recursively | |
11472 | as if it appeared here directly. Avoid error if symbol void. | |
11473 | Special case: if value of symbol is a string, output the string | |
11474 | literally. */ | |
11475 | { | |
11476 | register Lisp_Object tem; | |
11477 | tem = Fboundp (elt); | |
265a9e55 | 11478 | if (!NILP (tem)) |
a2889657 JB |
11479 | { |
11480 | tem = Fsymbol_value (elt); | |
11481 | /* If value is a string, output that string literally: | |
11482 | don't check for % within it. */ | |
e24c997d | 11483 | if (STRINGP (tem)) |
d39b6696 | 11484 | { |
5f5c8ee5 GM |
11485 | prec = XSTRING (tem)->size; |
11486 | if (precision > 0 && prec > precision - n) | |
11487 | prec = precision - n; | |
d39b6696 | 11488 | if (frame_title_ptr) |
5f5c8ee5 | 11489 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 11490 | else |
5f5c8ee5 GM |
11491 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
11492 | 0, prec, 0, -1); | |
d39b6696 | 11493 | } |
a2889657 | 11494 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
11495 | { |
11496 | /* Give up right away for nil or t. */ | |
11497 | elt = tem; | |
11498 | goto tail_recurse; | |
11499 | } | |
a2889657 JB |
11500 | } |
11501 | } | |
11502 | break; | |
11503 | ||
11504 | case Lisp_Cons: | |
11505 | { | |
11506 | register Lisp_Object car, tem; | |
11507 | ||
11508 | /* A cons cell: three distinct cases. | |
11509 | If first element is a string or a cons, process all the elements | |
11510 | and effectively concatenate them. | |
11511 | If first element is a negative number, truncate displaying cdr to | |
11512 | at most that many characters. If positive, pad (with spaces) | |
11513 | to at least that many characters. | |
11514 | If first element is a symbol, process the cadr or caddr recursively | |
11515 | according to whether the symbol's value is non-nil or nil. */ | |
11516 | car = XCONS (elt)->car; | |
5f5c8ee5 GM |
11517 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
11518 | { | |
11519 | /* An element of the form (:eval FORM) means evaluate FORM | |
11520 | and use the result as mode line elements. */ | |
11521 | struct gcpro gcpro1; | |
11522 | Lisp_Object spec; | |
11523 | ||
11524 | spec = eval_form (XCAR (XCDR (elt))); | |
11525 | GCPRO1 (spec); | |
11526 | n += display_mode_element (it, depth, field_width - n, | |
11527 | precision - n, spec); | |
11528 | UNGCPRO; | |
11529 | } | |
11530 | else if (SYMBOLP (car)) | |
a2889657 JB |
11531 | { |
11532 | tem = Fboundp (car); | |
11533 | elt = XCONS (elt)->cdr; | |
e24c997d | 11534 | if (!CONSP (elt)) |
a2889657 JB |
11535 | goto invalid; |
11536 | /* elt is now the cdr, and we know it is a cons cell. | |
11537 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 11538 | if (!NILP (tem)) |
a2889657 JB |
11539 | { |
11540 | tem = Fsymbol_value (car); | |
265a9e55 | 11541 | if (!NILP (tem)) |
a2889657 JB |
11542 | { elt = XCONS (elt)->car; goto tail_recurse; } |
11543 | } | |
11544 | /* Symbol's value is nil (or symbol is unbound) | |
11545 | Get the cddr of the original list | |
11546 | and if possible find the caddr and use that. */ | |
11547 | elt = XCONS (elt)->cdr; | |
265a9e55 | 11548 | if (NILP (elt)) |
a2889657 | 11549 | break; |
e24c997d | 11550 | else if (!CONSP (elt)) |
a2889657 JB |
11551 | goto invalid; |
11552 | elt = XCONS (elt)->car; | |
11553 | goto tail_recurse; | |
11554 | } | |
e24c997d | 11555 | else if (INTEGERP (car)) |
a2889657 JB |
11556 | { |
11557 | register int lim = XINT (car); | |
11558 | elt = XCONS (elt)->cdr; | |
11559 | if (lim < 0) | |
5f5c8ee5 GM |
11560 | { |
11561 | /* Negative int means reduce maximum width. */ | |
11562 | if (precision <= 0) | |
11563 | precision = -lim; | |
11564 | else | |
11565 | precision = min (precision, -lim); | |
11566 | } | |
a2889657 JB |
11567 | else if (lim > 0) |
11568 | { | |
11569 | /* Padding specified. Don't let it be more than | |
11570 | current maximum. */ | |
5f5c8ee5 GM |
11571 | if (precision > 0) |
11572 | lim = min (precision, lim); | |
11573 | ||
a2889657 JB |
11574 | /* If that's more padding than already wanted, queue it. |
11575 | But don't reduce padding already specified even if | |
11576 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 11577 | field_width = max (lim, field_width); |
a2889657 JB |
11578 | } |
11579 | goto tail_recurse; | |
11580 | } | |
e24c997d | 11581 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
11582 | { |
11583 | register int limit = 50; | |
5f5c8ee5 GM |
11584 | /* Limit is to protect against circular lists. */ |
11585 | while (CONSP (elt) | |
11586 | && --limit > 0 | |
11587 | && (precision <= 0 || n < precision)) | |
a2889657 | 11588 | { |
5f5c8ee5 GM |
11589 | n += display_mode_element (it, depth, field_width - n, |
11590 | precision - n, XCONS (elt)->car); | |
a2889657 JB |
11591 | elt = XCONS (elt)->cdr; |
11592 | } | |
11593 | } | |
11594 | } | |
11595 | break; | |
11596 | ||
11597 | default: | |
11598 | invalid: | |
d39b6696 | 11599 | if (frame_title_ptr) |
5f5c8ee5 | 11600 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 11601 | else |
5f5c8ee5 GM |
11602 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
11603 | precision - n, 0, 0); | |
11604 | return n; | |
a2889657 JB |
11605 | } |
11606 | ||
5f5c8ee5 GM |
11607 | /* Pad to FIELD_WIDTH. */ |
11608 | if (field_width > 0 && n < field_width) | |
11609 | { | |
11610 | if (frame_title_ptr) | |
11611 | n += store_frame_title ("", field_width - n, 0); | |
11612 | else | |
11613 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
11614 | 0, 0, 0); | |
11615 | } | |
11616 | ||
11617 | return n; | |
a2889657 | 11618 | } |
5f5c8ee5 GM |
11619 | |
11620 | ||
766525bc RS |
11621 | /* Write a null-terminated, right justified decimal representation of |
11622 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
11623 | ||
11624 | static void | |
11625 | pint2str (buf, width, d) | |
11626 | register char *buf; | |
11627 | register int width; | |
11628 | register int d; | |
11629 | { | |
11630 | register char *p = buf; | |
11631 | ||
11632 | if (d <= 0) | |
5f5c8ee5 | 11633 | *p++ = '0'; |
766525bc | 11634 | else |
5f5c8ee5 | 11635 | { |
766525bc | 11636 | while (d > 0) |
5f5c8ee5 | 11637 | { |
766525bc RS |
11638 | *p++ = d % 10 + '0'; |
11639 | d /= 10; | |
5f5c8ee5 GM |
11640 | } |
11641 | } | |
11642 | ||
11643 | for (width -= (int) (p - buf); width > 0; --width) | |
11644 | *p++ = ' '; | |
766525bc RS |
11645 | *p-- = '\0'; |
11646 | while (p > buf) | |
5f5c8ee5 | 11647 | { |
766525bc RS |
11648 | d = *buf; |
11649 | *buf++ = *p; | |
11650 | *p-- = d; | |
5f5c8ee5 | 11651 | } |
766525bc RS |
11652 | } |
11653 | ||
5f5c8ee5 | 11654 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
11655 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
11656 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
11657 | ||
6693a99a | 11658 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 11659 | |
1c9241f5 KH |
11660 | static char * |
11661 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
11662 | Lisp_Object coding_system; | |
11663 | register char *buf; | |
11664 | int eol_flag; | |
11665 | { | |
1e1078d6 | 11666 | Lisp_Object val; |
916848d8 | 11667 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
11668 | unsigned char *eol_str; |
11669 | int eol_str_len; | |
11670 | /* The EOL conversion we are using. */ | |
11671 | Lisp_Object eoltype; | |
1e1078d6 RS |
11672 | |
11673 | val = coding_system; | |
1c9241f5 KH |
11674 | |
11675 | if (NILP (val)) /* Not yet decided. */ | |
11676 | { | |
916848d8 RS |
11677 | if (multibyte) |
11678 | *buf++ = '-'; | |
21e989e3 | 11679 | if (eol_flag) |
302f2b38 | 11680 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 11681 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
11682 | } |
11683 | else | |
11684 | { | |
1e1078d6 RS |
11685 | Lisp_Object eolvalue; |
11686 | ||
11687 | eolvalue = Fget (coding_system, Qeol_type); | |
11688 | ||
1c9241f5 | 11689 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
11690 | { |
11691 | val = Fget (val, Qcoding_system); | |
11692 | if (NILP (eolvalue)) | |
b070c1d7 | 11693 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
11694 | } |
11695 | ||
916848d8 RS |
11696 | if (multibyte) |
11697 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
11698 | ||
1c9241f5 KH |
11699 | if (eol_flag) |
11700 | { | |
1e1078d6 RS |
11701 | /* The EOL conversion that is normal on this system. */ |
11702 | ||
11703 | if (NILP (eolvalue)) /* Not yet decided. */ | |
11704 | eoltype = eol_mnemonic_undecided; | |
11705 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
11706 | eoltype = eol_mnemonic_undecided; | |
11707 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
11708 | eoltype = (XFASTINT (eolvalue) == 0 | |
11709 | ? eol_mnemonic_unix | |
11710 | : (XFASTINT (eolvalue) == 1 | |
11711 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
11712 | } |
11713 | } | |
5f5c8ee5 | 11714 | |
302f2b38 EZ |
11715 | if (eol_flag) |
11716 | { | |
11717 | /* Mention the EOL conversion if it is not the usual one. */ | |
11718 | if (STRINGP (eoltype)) | |
11719 | { | |
11720 | eol_str = XSTRING (eoltype)->data; | |
11721 | eol_str_len = XSTRING (eoltype)->size; | |
11722 | } | |
f30b3499 KH |
11723 | else if (INTEGERP (eoltype) |
11724 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
11725 | { | |
f30b3499 KH |
11726 | unsigned char work[4]; |
11727 | ||
11728 | eol_str_len = CHAR_STRING (XINT (eoltype), work, eol_str); | |
11729 | } | |
302f2b38 EZ |
11730 | else |
11731 | { | |
11732 | eol_str = invalid_eol_type; | |
11733 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 11734 | } |
f30b3499 | 11735 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 11736 | buf += eol_str_len; |
1c9241f5 | 11737 | } |
302f2b38 | 11738 | |
1c9241f5 KH |
11739 | return buf; |
11740 | } | |
11741 | ||
a2889657 | 11742 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
11743 | generated by character C. PRECISION >= 0 means don't return a |
11744 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
11745 | string returned with spaces to that value. */ | |
a2889657 | 11746 | |
11e82b76 JB |
11747 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
11748 | ||
a2889657 | 11749 | static char * |
5f5c8ee5 | 11750 | decode_mode_spec (w, c, field_width, precision) |
a2889657 JB |
11751 | struct window *w; |
11752 | register char c; | |
5f5c8ee5 | 11753 | int field_width, precision; |
a2889657 | 11754 | { |
0b67772d | 11755 | Lisp_Object obj; |
5f5c8ee5 GM |
11756 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11757 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 11758 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 11759 | |
0b67772d | 11760 | obj = Qnil; |
a2889657 JB |
11761 | |
11762 | switch (c) | |
11763 | { | |
1af9f229 RS |
11764 | case '*': |
11765 | if (!NILP (b->read_only)) | |
11766 | return "%"; | |
11767 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11768 | return "*"; | |
11769 | return "-"; | |
11770 | ||
11771 | case '+': | |
11772 | /* This differs from %* only for a modified read-only buffer. */ | |
11773 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11774 | return "*"; | |
11775 | if (!NILP (b->read_only)) | |
11776 | return "%"; | |
11777 | return "-"; | |
11778 | ||
11779 | case '&': | |
11780 | /* This differs from %* in ignoring read-only-ness. */ | |
11781 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11782 | return "*"; | |
11783 | return "-"; | |
11784 | ||
11785 | case '%': | |
11786 | return "%"; | |
11787 | ||
11788 | case '[': | |
11789 | { | |
11790 | int i; | |
11791 | char *p; | |
11792 | ||
11793 | if (command_loop_level > 5) | |
11794 | return "[[[... "; | |
11795 | p = decode_mode_spec_buf; | |
11796 | for (i = 0; i < command_loop_level; i++) | |
11797 | *p++ = '['; | |
11798 | *p = 0; | |
11799 | return decode_mode_spec_buf; | |
11800 | } | |
11801 | ||
11802 | case ']': | |
11803 | { | |
11804 | int i; | |
11805 | char *p; | |
11806 | ||
11807 | if (command_loop_level > 5) | |
11808 | return " ...]]]"; | |
11809 | p = decode_mode_spec_buf; | |
11810 | for (i = 0; i < command_loop_level; i++) | |
11811 | *p++ = ']'; | |
11812 | *p = 0; | |
11813 | return decode_mode_spec_buf; | |
11814 | } | |
11815 | ||
11816 | case '-': | |
11817 | { | |
1af9f229 | 11818 | register int i; |
5f5c8ee5 GM |
11819 | |
11820 | /* Let lots_of_dashes be a string of infinite length. */ | |
11821 | if (field_width <= 0 | |
11822 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 11823 | { |
5f5c8ee5 GM |
11824 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
11825 | decode_mode_spec_buf[i] = '-'; | |
11826 | decode_mode_spec_buf[i] = '\0'; | |
11827 | return decode_mode_spec_buf; | |
1af9f229 | 11828 | } |
5f5c8ee5 GM |
11829 | else |
11830 | return lots_of_dashes; | |
1af9f229 RS |
11831 | } |
11832 | ||
a2889657 | 11833 | case 'b': |
d39b6696 | 11834 | obj = b->name; |
a2889657 JB |
11835 | break; |
11836 | ||
1af9f229 RS |
11837 | case 'c': |
11838 | { | |
11839 | int col = current_column (); | |
11840 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 11841 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
11842 | return decode_mode_spec_buf; |
11843 | } | |
11844 | ||
11845 | case 'F': | |
11846 | /* %F displays the frame name. */ | |
5f5c8ee5 | 11847 | if (!NILP (f->title)) |
95184b48 | 11848 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 11849 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 11850 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 11851 | return "Emacs"; |
1af9f229 | 11852 | |
a2889657 | 11853 | case 'f': |
d39b6696 | 11854 | obj = b->filename; |
a2889657 JB |
11855 | break; |
11856 | ||
aa6d10fa RS |
11857 | case 'l': |
11858 | { | |
12adba34 RS |
11859 | int startpos = XMARKER (w->start)->charpos; |
11860 | int startpos_byte = marker_byte_position (w->start); | |
11861 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 11862 | int nlines, junk; |
aa6d10fa RS |
11863 | int height = XFASTINT (w->height); |
11864 | ||
11865 | /* If we decided that this buffer isn't suitable for line numbers, | |
11866 | don't forget that too fast. */ | |
11867 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 11868 | goto no_value; |
5300fd39 RS |
11869 | /* But do forget it, if the window shows a different buffer now. */ |
11870 | else if (BUFFERP (w->base_line_pos)) | |
11871 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
11872 | |
11873 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 11874 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
11875 | { |
11876 | w->base_line_pos = Qnil; | |
11877 | w->base_line_number = Qnil; | |
766525bc | 11878 | goto no_value; |
aa6d10fa RS |
11879 | } |
11880 | ||
11881 | if (!NILP (w->base_line_number) | |
11882 | && !NILP (w->base_line_pos) | |
12adba34 | 11883 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
11884 | { |
11885 | line = XFASTINT (w->base_line_number); | |
11886 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 11887 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
11888 | } |
11889 | else | |
11890 | { | |
11891 | line = 1; | |
d39b6696 | 11892 | linepos = BUF_BEGV (b); |
12adba34 | 11893 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
11894 | } |
11895 | ||
11896 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
11897 | nlines = display_count_lines (linepos, linepos_byte, |
11898 | startpos_byte, | |
11899 | startpos, &junk); | |
aa6d10fa RS |
11900 | |
11901 | topline = nlines + line; | |
11902 | ||
11903 | /* Determine a new base line, if the old one is too close | |
11904 | or too far away, or if we did not have one. | |
11905 | "Too close" means it's plausible a scroll-down would | |
11906 | go back past it. */ | |
d39b6696 | 11907 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 11908 | { |
c2213350 KH |
11909 | XSETFASTINT (w->base_line_number, topline); |
11910 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
11911 | } |
11912 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 11913 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 11914 | { |
d39b6696 | 11915 | int limit = BUF_BEGV (b); |
12adba34 | 11916 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 11917 | int position; |
5d121aec | 11918 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
11919 | |
11920 | if (startpos - distance > limit) | |
12adba34 RS |
11921 | { |
11922 | limit = startpos - distance; | |
11923 | limit_byte = CHAR_TO_BYTE (limit); | |
11924 | } | |
aa6d10fa | 11925 | |
12adba34 RS |
11926 | nlines = display_count_lines (startpos, startpos_byte, |
11927 | limit_byte, | |
11928 | - (height * 2 + 30), | |
aa6d10fa RS |
11929 | &position); |
11930 | /* If we couldn't find the lines we wanted within | |
5d121aec | 11931 | line_number_display_limit_width chars per line, |
aa6d10fa | 11932 | give up on line numbers for this window. */ |
12adba34 | 11933 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
11934 | { |
11935 | w->base_line_pos = w->buffer; | |
11936 | w->base_line_number = Qnil; | |
766525bc | 11937 | goto no_value; |
aa6d10fa RS |
11938 | } |
11939 | ||
c2213350 | 11940 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 11941 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
11942 | } |
11943 | ||
11944 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
11945 | nlines = display_count_lines (startpos, startpos_byte, |
11946 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
11947 | |
11948 | /* Record that we did display the line number. */ | |
11949 | line_number_displayed = 1; | |
11950 | ||
11951 | /* Make the string to show. */ | |
5f5c8ee5 | 11952 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 11953 | return decode_mode_spec_buf; |
766525bc RS |
11954 | no_value: |
11955 | { | |
11956 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
11957 | int pad = field_width - 2; |
11958 | while (pad-- > 0) | |
11959 | *p++ = ' '; | |
11960 | *p++ = '?'; | |
11961 | *p = '?'; | |
766525bc RS |
11962 | return decode_mode_spec_buf; |
11963 | } | |
aa6d10fa RS |
11964 | } |
11965 | break; | |
11966 | ||
a2889657 | 11967 | case 'm': |
d39b6696 | 11968 | obj = b->mode_name; |
a2889657 JB |
11969 | break; |
11970 | ||
11971 | case 'n': | |
d39b6696 | 11972 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
11973 | return " Narrow"; |
11974 | break; | |
11975 | ||
a2889657 JB |
11976 | case 'p': |
11977 | { | |
11978 | int pos = marker_position (w->start); | |
d39b6696 | 11979 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 11980 | |
d39b6696 | 11981 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 11982 | { |
d39b6696 | 11983 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
11984 | return "All"; |
11985 | else | |
11986 | return "Bottom"; | |
11987 | } | |
d39b6696 | 11988 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
11989 | return "Top"; |
11990 | else | |
11991 | { | |
3c7d31b9 RS |
11992 | if (total > 1000000) |
11993 | /* Do it differently for a large value, to avoid overflow. */ | |
11994 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
11995 | else | |
11996 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
11997 | /* We can't normally display a 3-digit number, |
11998 | so get us a 2-digit number that is close. */ | |
11999 | if (total == 100) | |
12000 | total = 99; | |
12001 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12002 | return decode_mode_spec_buf; | |
12003 | } | |
12004 | } | |
12005 | ||
8ffcb79f RS |
12006 | /* Display percentage of size above the bottom of the screen. */ |
12007 | case 'P': | |
12008 | { | |
12009 | int toppos = marker_position (w->start); | |
d39b6696 KH |
12010 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
12011 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 12012 | |
d39b6696 | 12013 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 12014 | { |
d39b6696 | 12015 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12016 | return "All"; |
12017 | else | |
12018 | return "Bottom"; | |
12019 | } | |
12020 | else | |
12021 | { | |
3c7d31b9 RS |
12022 | if (total > 1000000) |
12023 | /* Do it differently for a large value, to avoid overflow. */ | |
12024 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12025 | else | |
12026 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
12027 | /* We can't normally display a 3-digit number, |
12028 | so get us a 2-digit number that is close. */ | |
12029 | if (total == 100) | |
12030 | total = 99; | |
d39b6696 | 12031 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12032 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
12033 | else | |
12034 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12035 | return decode_mode_spec_buf; | |
12036 | } | |
12037 | } | |
12038 | ||
1af9f229 RS |
12039 | case 's': |
12040 | /* status of process */ | |
12041 | obj = Fget_buffer_process (w->buffer); | |
12042 | if (NILP (obj)) | |
12043 | return "no process"; | |
12044 | #ifdef subprocesses | |
12045 | obj = Fsymbol_name (Fprocess_status (obj)); | |
12046 | #endif | |
12047 | break; | |
d39b6696 | 12048 | |
1af9f229 RS |
12049 | case 't': /* indicate TEXT or BINARY */ |
12050 | #ifdef MODE_LINE_BINARY_TEXT | |
12051 | return MODE_LINE_BINARY_TEXT (b); | |
12052 | #else | |
12053 | return "T"; | |
12054 | #endif | |
1c9241f5 KH |
12055 | |
12056 | case 'z': | |
12057 | /* coding-system (not including end-of-line format) */ | |
12058 | case 'Z': | |
12059 | /* coding-system (including end-of-line type) */ | |
12060 | { | |
12061 | int eol_flag = (c == 'Z'); | |
539b4d41 | 12062 | char *p = decode_mode_spec_buf; |
1c9241f5 | 12063 | |
d30e754b | 12064 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 12065 | { |
11c52c4f RS |
12066 | /* No need to mention EOL here--the terminal never needs |
12067 | to do EOL conversion. */ | |
12068 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
12069 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 12070 | } |
f13c925f | 12071 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 12072 | p, eol_flag); |
f13c925f | 12073 | |
11c52c4f | 12074 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
12075 | #ifdef subprocesses |
12076 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
12077 | if (PROCESSP (obj)) | |
12078 | { | |
12079 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
12080 | p, eol_flag); | |
12081 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
12082 | p, eol_flag); | |
12083 | } | |
12084 | #endif /* subprocesses */ | |
11c52c4f | 12085 | #endif /* 0 */ |
1c9241f5 KH |
12086 | *p = 0; |
12087 | return decode_mode_spec_buf; | |
12088 | } | |
a2889657 | 12089 | } |
d39b6696 | 12090 | |
e24c997d | 12091 | if (STRINGP (obj)) |
a2889657 JB |
12092 | return (char *) XSTRING (obj)->data; |
12093 | else | |
12094 | return ""; | |
12095 | } | |
5f5c8ee5 GM |
12096 | |
12097 | ||
12adba34 RS |
12098 | /* Count up to COUNT lines starting from START / START_BYTE. |
12099 | But don't go beyond LIMIT_BYTE. | |
12100 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 12101 | |
12adba34 | 12102 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
12103 | |
12104 | static int | |
12adba34 RS |
12105 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
12106 | int start, start_byte, limit_byte, count; | |
12107 | int *byte_pos_ptr; | |
59b49f63 | 12108 | { |
59b49f63 RS |
12109 | register unsigned char *cursor; |
12110 | unsigned char *base; | |
12111 | ||
12112 | register int ceiling; | |
12113 | register unsigned char *ceiling_addr; | |
12adba34 | 12114 | int orig_count = count; |
59b49f63 RS |
12115 | |
12116 | /* If we are not in selective display mode, | |
12117 | check only for newlines. */ | |
12adba34 RS |
12118 | int selective_display = (!NILP (current_buffer->selective_display) |
12119 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
12120 | |
12121 | if (count > 0) | |
12adba34 RS |
12122 | { |
12123 | while (start_byte < limit_byte) | |
12124 | { | |
12125 | ceiling = BUFFER_CEILING_OF (start_byte); | |
12126 | ceiling = min (limit_byte - 1, ceiling); | |
12127 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
12128 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
12129 | while (1) | |
12130 | { | |
12131 | if (selective_display) | |
12132 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
12133 | ; | |
12134 | else | |
12135 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
12136 | ; | |
12137 | ||
12138 | if (cursor != ceiling_addr) | |
12139 | { | |
12140 | if (--count == 0) | |
12141 | { | |
12142 | start_byte += cursor - base + 1; | |
12143 | *byte_pos_ptr = start_byte; | |
12144 | return orig_count; | |
12145 | } | |
12146 | else | |
12147 | if (++cursor == ceiling_addr) | |
12148 | break; | |
12149 | } | |
12150 | else | |
12151 | break; | |
12152 | } | |
12153 | start_byte += cursor - base; | |
12154 | } | |
12155 | } | |
59b49f63 RS |
12156 | else |
12157 | { | |
12adba34 RS |
12158 | while (start_byte > limit_byte) |
12159 | { | |
12160 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
12161 | ceiling = max (limit_byte, ceiling); | |
12162 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
12163 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
12164 | while (1) |
12165 | { | |
12adba34 RS |
12166 | if (selective_display) |
12167 | while (--cursor != ceiling_addr | |
12168 | && *cursor != '\n' && *cursor != 015) | |
12169 | ; | |
12170 | else | |
12171 | while (--cursor != ceiling_addr && *cursor != '\n') | |
12172 | ; | |
12173 | ||
59b49f63 RS |
12174 | if (cursor != ceiling_addr) |
12175 | { | |
12176 | if (++count == 0) | |
12177 | { | |
12adba34 RS |
12178 | start_byte += cursor - base + 1; |
12179 | *byte_pos_ptr = start_byte; | |
12180 | /* When scanning backwards, we should | |
12181 | not count the newline posterior to which we stop. */ | |
12182 | return - orig_count - 1; | |
59b49f63 RS |
12183 | } |
12184 | } | |
12185 | else | |
12186 | break; | |
12187 | } | |
12adba34 RS |
12188 | /* Here we add 1 to compensate for the last decrement |
12189 | of CURSOR, which took it past the valid range. */ | |
12190 | start_byte += cursor - base + 1; | |
59b49f63 RS |
12191 | } |
12192 | } | |
12193 | ||
12adba34 | 12194 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 12195 | |
12adba34 RS |
12196 | if (count < 0) |
12197 | return - orig_count + count; | |
12198 | return orig_count - count; | |
aa6d10fa | 12199 | |
12adba34 | 12200 | } |
a2889657 | 12201 | |
a2889657 | 12202 | |
5f5c8ee5 GM |
12203 | \f |
12204 | /*********************************************************************** | |
12205 | Displaying strings | |
12206 | ***********************************************************************/ | |
278feba9 | 12207 | |
5f5c8ee5 | 12208 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 12209 | |
5f5c8ee5 GM |
12210 | If STRING is non-null, display that C string. Otherwise, the Lisp |
12211 | string LISP_STRING is displayed. | |
a2889657 | 12212 | |
5f5c8ee5 GM |
12213 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
12214 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
12215 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 12216 | |
5f5c8ee5 GM |
12217 | Display the string in the environment given by IT, but use the |
12218 | standard display table, temporarily. | |
a3788d53 | 12219 | |
5f5c8ee5 GM |
12220 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
12221 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
12222 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
12223 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
12224 | ||
12225 | PRECISION is the maximum number of characters to output from | |
12226 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 12227 | |
5f5c8ee5 | 12228 | This is roughly equivalent to printf format specifiers: |
a2889657 | 12229 | |
5f5c8ee5 GM |
12230 | FIELD_WIDTH PRECISION PRINTF |
12231 | ---------------------------------------- | |
12232 | -1 -1 %s | |
12233 | -1 10 %.10s | |
12234 | 10 -1 %10s | |
12235 | 20 10 %20.10s | |
a2889657 | 12236 | |
5f5c8ee5 GM |
12237 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
12238 | display them, and < 0 means obey the current buffer's value of | |
12239 | enable_multibyte_characters. | |
278feba9 | 12240 | |
5f5c8ee5 | 12241 | Value is the number of glyphs produced. */ |
b1d1124b | 12242 | |
5f5c8ee5 GM |
12243 | static int |
12244 | display_string (string, lisp_string, face_string, face_string_pos, | |
12245 | start, it, field_width, precision, max_x, multibyte) | |
12246 | unsigned char *string; | |
12247 | Lisp_Object lisp_string; | |
12248 | int start; | |
12249 | struct it *it; | |
12250 | int field_width, precision, max_x; | |
12251 | int multibyte; | |
12252 | { | |
12253 | int hpos_at_start = it->hpos; | |
12254 | int saved_face_id = it->face_id; | |
12255 | struct glyph_row *row = it->glyph_row; | |
12256 | ||
12257 | /* Initialize the iterator IT for iteration over STRING beginning | |
12258 | with index START. We assume that IT may be modified here (which | |
12259 | means that display_line has to do something when displaying a | |
12260 | mini-buffer prompt, which it does). */ | |
12261 | reseat_to_string (it, string, lisp_string, start, | |
12262 | precision, field_width, multibyte); | |
12263 | ||
12264 | /* If displaying STRING, set up the face of the iterator | |
12265 | from LISP_STRING, if that's given. */ | |
12266 | if (STRINGP (face_string)) | |
12267 | { | |
12268 | int endptr; | |
12269 | struct face *face; | |
12270 | ||
12271 | it->face_id | |
12272 | = face_at_string_position (it->w, face_string, face_string_pos, | |
12273 | 0, it->region_beg_charpos, | |
12274 | it->region_end_charpos, | |
12275 | &endptr, it->base_face_id); | |
12276 | face = FACE_FROM_ID (it->f, it->face_id); | |
12277 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 12278 | } |
a2889657 | 12279 | |
5f5c8ee5 GM |
12280 | /* Set max_x to the maximum allowed X position. Don't let it go |
12281 | beyond the right edge of the window. */ | |
12282 | if (max_x <= 0) | |
12283 | max_x = it->last_visible_x; | |
12284 | else | |
12285 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 12286 | |
5f5c8ee5 GM |
12287 | /* Skip over display elements that are not visible. because IT->w is |
12288 | hscrolled. */ | |
12289 | if (it->current_x < it->first_visible_x) | |
12290 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
12291 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 12292 | |
5f5c8ee5 GM |
12293 | row->ascent = it->max_ascent; |
12294 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12295 | row->phys_ascent = it->max_phys_ascent; |
12296 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 12297 | |
5f5c8ee5 GM |
12298 | /* This condition is for the case that we are called with current_x |
12299 | past last_visible_x. */ | |
12300 | while (it->current_x < max_x) | |
a2889657 | 12301 | { |
5f5c8ee5 | 12302 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 12303 | |
5f5c8ee5 GM |
12304 | /* Get the next display element. */ |
12305 | if (!get_next_display_element (it)) | |
90adcf20 | 12306 | break; |
1c9241f5 | 12307 | |
5f5c8ee5 GM |
12308 | /* Produce glyphs. */ |
12309 | x_before = it->current_x; | |
12310 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
12311 | PRODUCE_GLYPHS (it); | |
90adcf20 | 12312 | |
5f5c8ee5 GM |
12313 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
12314 | i = 0; | |
12315 | x = x_before; | |
12316 | while (i < nglyphs) | |
a2889657 | 12317 | { |
5f5c8ee5 GM |
12318 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
12319 | ||
12320 | if (!it->truncate_lines_p | |
12321 | && x + glyph->pixel_width > max_x) | |
12322 | { | |
12323 | /* End of continued line or max_x reached. */ | |
12324 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
12325 | it->current_x = x; | |
12326 | break; | |
12327 | } | |
12328 | else if (x + glyph->pixel_width > it->first_visible_x) | |
12329 | { | |
12330 | /* Glyph is at least partially visible. */ | |
12331 | ++it->hpos; | |
12332 | if (x < it->first_visible_x) | |
12333 | it->glyph_row->x = x - it->first_visible_x; | |
12334 | } | |
12335 | else | |
a2889657 | 12336 | { |
5f5c8ee5 GM |
12337 | /* Glyph is off the left margin of the display area. |
12338 | Should not happen. */ | |
12339 | abort (); | |
a2889657 | 12340 | } |
5f5c8ee5 GM |
12341 | |
12342 | row->ascent = max (row->ascent, it->max_ascent); | |
12343 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12344 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12345 | row->phys_height = max (row->phys_height, | |
12346 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
12347 | x += glyph->pixel_width; |
12348 | ++i; | |
a2889657 | 12349 | } |
5f5c8ee5 GM |
12350 | |
12351 | /* Stop if max_x reached. */ | |
12352 | if (i < nglyphs) | |
12353 | break; | |
12354 | ||
12355 | /* Stop at line ends. */ | |
12356 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 12357 | { |
5f5c8ee5 GM |
12358 | it->continuation_lines_width = 0; |
12359 | break; | |
a2889657 | 12360 | } |
1c9241f5 | 12361 | |
5f5c8ee5 | 12362 | set_iterator_to_next (it); |
a688bb24 | 12363 | |
5f5c8ee5 GM |
12364 | /* Stop if truncating at the right edge. */ |
12365 | if (it->truncate_lines_p | |
12366 | && it->current_x >= it->last_visible_x) | |
12367 | { | |
12368 | /* Add truncation mark, but don't do it if the line is | |
12369 | truncated at a padding space. */ | |
12370 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 12371 | { |
5f5c8ee5 GM |
12372 | if (!FRAME_WINDOW_P (it->f)) |
12373 | produce_special_glyphs (it, IT_TRUNCATION); | |
12374 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 12375 | } |
5f5c8ee5 | 12376 | break; |
1c9241f5 | 12377 | } |
a2889657 JB |
12378 | } |
12379 | ||
5f5c8ee5 GM |
12380 | /* Maybe insert a truncation at the left. */ |
12381 | if (it->first_visible_x | |
12382 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 12383 | { |
5f5c8ee5 GM |
12384 | if (!FRAME_WINDOW_P (it->f)) |
12385 | insert_left_trunc_glyphs (it); | |
12386 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
12387 | } |
12388 | ||
5f5c8ee5 GM |
12389 | it->face_id = saved_face_id; |
12390 | ||
12391 | /* Value is number of columns displayed. */ | |
12392 | return it->hpos - hpos_at_start; | |
12393 | } | |
a2889657 | 12394 | |
a2889657 | 12395 | |
a2889657 | 12396 | \f |
5f5c8ee5 GM |
12397 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
12398 | appears as an element of LIST or as the car of an element of LIST. | |
12399 | If PROPVAL is a list, compare each element against LIST in that | |
12400 | way, and return 1 if any element of PROPVAL is found in LIST. | |
12401 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12402 | |
12403 | int | |
12404 | invisible_p (propval, list) | |
12405 | register Lisp_Object propval; | |
12406 | Lisp_Object list; | |
12407 | { | |
af460d46 RS |
12408 | register Lisp_Object tail, proptail; |
12409 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
12410 | { |
12411 | register Lisp_Object tem; | |
af460d46 | 12412 | tem = XCONS (tail)->car; |
642eefc6 RS |
12413 | if (EQ (propval, tem)) |
12414 | return 1; | |
12415 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) | |
12416 | return 1; | |
12417 | } | |
af460d46 RS |
12418 | if (CONSP (propval)) |
12419 | for (proptail = propval; CONSP (proptail); | |
12420 | proptail = XCONS (proptail)->cdr) | |
12421 | { | |
12422 | Lisp_Object propelt; | |
12423 | propelt = XCONS (proptail)->car; | |
12424 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
12425 | { | |
12426 | register Lisp_Object tem; | |
12427 | tem = XCONS (tail)->car; | |
12428 | if (EQ (propelt, tem)) | |
12429 | return 1; | |
12430 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
12431 | return 1; | |
12432 | } | |
12433 | } | |
642eefc6 RS |
12434 | return 0; |
12435 | } | |
12436 | ||
5f5c8ee5 GM |
12437 | |
12438 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
12439 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
12440 | each element of PROPVAL in that way, and the first time some | |
12441 | element is found, return 1 if the cdr of that element is non-nil. | |
12442 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12443 | |
12444 | int | |
12445 | invisible_ellipsis_p (propval, list) | |
12446 | register Lisp_Object propval; | |
12447 | Lisp_Object list; | |
12448 | { | |
af460d46 RS |
12449 | register Lisp_Object tail, proptail; |
12450 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
642eefc6 RS |
12451 | { |
12452 | register Lisp_Object tem; | |
af460d46 | 12453 | tem = XCONS (tail)->car; |
642eefc6 RS |
12454 | if (CONSP (tem) && EQ (propval, XCONS (tem)->car)) |
12455 | return ! NILP (XCONS (tem)->cdr); | |
12456 | } | |
af460d46 RS |
12457 | if (CONSP (propval)) |
12458 | for (proptail = propval; CONSP (proptail); | |
12459 | proptail = XCONS (proptail)->cdr) | |
12460 | { | |
12461 | Lisp_Object propelt; | |
12462 | propelt = XCONS (proptail)->car; | |
12463 | for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr) | |
12464 | { | |
12465 | register Lisp_Object tem; | |
12466 | tem = XCONS (tail)->car; | |
12467 | if (CONSP (tem) && EQ (propelt, XCONS (tem)->car)) | |
12468 | return ! NILP (XCONS (tem)->cdr); | |
12469 | } | |
12470 | } | |
642eefc6 RS |
12471 | return 0; |
12472 | } | |
5f5c8ee5 GM |
12473 | |
12474 | ||
642eefc6 | 12475 | \f |
5f5c8ee5 GM |
12476 | /*********************************************************************** |
12477 | Initialization | |
12478 | ***********************************************************************/ | |
12479 | ||
a2889657 JB |
12480 | void |
12481 | syms_of_xdisp () | |
12482 | { | |
9142dd5b GM |
12483 | Vresize_mini_config = Qnil; |
12484 | staticpro (&Vresize_mini_config); | |
12485 | ||
c6e89d6c GM |
12486 | Vwith_echo_area_save_vector = Qnil; |
12487 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 12488 | |
c6e89d6c GM |
12489 | Vmessage_stack = Qnil; |
12490 | staticpro (&Vmessage_stack); | |
12491 | ||
735c094c | 12492 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 12493 | staticpro (&Qinhibit_redisplay); |
735c094c | 12494 | |
5f5c8ee5 GM |
12495 | #if GLYPH_DEBUG |
12496 | defsubr (&Sdump_glyph_matrix); | |
12497 | defsubr (&Sdump_glyph_row); | |
12498 | defsubr (&Sdump_toolbar_row); | |
12499 | defsubr (&Strace_redisplay_toggle); | |
12500 | #endif | |
12501 | ||
cf074754 RS |
12502 | staticpro (&Qmenu_bar_update_hook); |
12503 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
12504 | ||
d46fb96a | 12505 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 12506 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 12507 | |
399164b4 KH |
12508 | staticpro (&Qoverriding_local_map); |
12509 | Qoverriding_local_map = intern ("overriding-local-map"); | |
12510 | ||
75c43375 RS |
12511 | staticpro (&Qwindow_scroll_functions); |
12512 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
12513 | ||
e0bfbde6 RS |
12514 | staticpro (&Qredisplay_end_trigger_functions); |
12515 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 12516 | |
2e54982e RS |
12517 | staticpro (&Qinhibit_point_motion_hooks); |
12518 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
12519 | ||
5f5c8ee5 GM |
12520 | staticpro (&Qdisplay); |
12521 | Qdisplay = intern ("display"); | |
12522 | staticpro (&Qleft_margin); | |
12523 | Qspace_width = intern ("space-width"); | |
12524 | staticpro (&Qspace_width); | |
12525 | Qheight = intern ("height"); | |
12526 | staticpro (&Qheight); | |
12527 | Qraise = intern ("raise"); | |
12528 | staticpro (&Qraise); | |
12529 | Qspace = intern ("space"); | |
12530 | staticpro (&Qspace); | |
12531 | Qleft_margin = intern ("left-margin"); | |
12532 | staticpro (&Qright_margin); | |
12533 | Qright_margin = intern ("right-margin"); | |
12534 | Qalign_to = intern ("align-to"); | |
12535 | staticpro (&Qalign_to); | |
12536 | QCalign_to = intern (":align-to"); | |
12537 | staticpro (&QCalign_to); | |
12538 | Qwidth = intern ("width"); | |
12539 | staticpro (&Qwidth); | |
12540 | Qrelative_width = intern ("relative-width"); | |
12541 | staticpro (&Qrelative_width); | |
12542 | QCrelative_width = intern (":relative-width"); | |
12543 | staticpro (&QCrelative_width); | |
12544 | QCrelative_height = intern (":relative-height"); | |
12545 | staticpro (&QCrelative_height); | |
12546 | QCeval = intern (":eval"); | |
12547 | staticpro (&QCeval); | |
12548 | QCwhen = intern (":when"); | |
12549 | staticpro (&QCwhen); | |
12550 | Qfontified = intern ("fontified"); | |
12551 | staticpro (&Qfontified); | |
12552 | Qfontification_functions = intern ("fontification-functions"); | |
12553 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
12554 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
12555 | staticpro (&Qtrailing_whitespace); | |
12556 | Qimage = intern ("image"); | |
12557 | staticpro (&Qimage); | |
12558 | ||
a2889657 JB |
12559 | staticpro (&last_arrow_position); |
12560 | staticpro (&last_arrow_string); | |
12561 | last_arrow_position = Qnil; | |
12562 | last_arrow_string = Qnil; | |
c6e89d6c GM |
12563 | |
12564 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
12565 | staticpro (&echo_buffer[0]); | |
12566 | staticpro (&echo_buffer[1]); | |
12567 | ||
12568 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
12569 | staticpro (&echo_area_buffer[0]); | |
12570 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 12571 | |
8f897821 GM |
12572 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
12573 | "Non-nil means highlight trailing whitespace.\n\ | |
12574 | The face used for trailing whitespace is `trailing-whitespace'."); | |
12575 | Vshow_trailing_whitespace = Qnil; | |
12576 | ||
735c094c KH |
12577 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
12578 | "Non-nil means don't actually do any redisplay.\n\ | |
12579 | This is used for internal purposes."); | |
12580 | Vinhibit_redisplay = Qnil; | |
12581 | ||
a2889657 | 12582 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 12583 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
12584 | Vglobal_mode_string = Qnil; |
12585 | ||
12586 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
12587 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
12588 | This must be the beginning of a line in order to work.\n\ | |
12589 | See also `overlay-arrow-string'."); | |
12590 | Voverlay_arrow_position = Qnil; | |
12591 | ||
12592 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
12593 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
12594 | Voverlay_arrow_string = Qnil; | |
12595 | ||
12596 | DEFVAR_INT ("scroll-step", &scroll_step, | |
12597 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
12598 | If that fails to bring point back on frame, point is centered instead.\n\ |
12599 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 12600 | |
0789adb2 RS |
12601 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
12602 | "*Scroll up to this many lines, to bring point back on screen."); | |
12603 | scroll_conservatively = 0; | |
12604 | ||
9afd2168 RS |
12605 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
12606 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
12607 | Recenter the window whenever point gets within this many lines\n\ | |
12608 | of the top or bottom of the window."); | |
12609 | scroll_margin = 0; | |
12610 | ||
5f5c8ee5 | 12611 | #if GLYPH_DEBUG |
a2889657 | 12612 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 12613 | #endif |
a2889657 JB |
12614 | |
12615 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
12616 | &truncate_partial_width_windows, | |
44fa5b1e | 12617 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
12618 | truncate_partial_width_windows = 1; |
12619 | ||
12620 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
12621 | "*Non-nil means use inverse video for the mode line."); | |
12622 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
12623 | |
12624 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5f5c8ee5 | 12625 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 12626 | If the buffer is bigger than this, the line number does not appear\n\ |
9f027393 | 12627 | in the mode line."); |
aa6d10fa | 12628 | line_number_display_limit = 1000000; |
fba9ce76 | 12629 | |
5d121aec KH |
12630 | DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width, |
12631 | "*Maximum line width (in characters) for line number display.\n\ | |
12632 | If the average length of the lines near point is bigger than this, then the\n\ | |
12633 | line number may be omitted from the mode line."); | |
12634 | line_number_display_limit_width = 200; | |
12635 | ||
fba9ce76 RS |
12636 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
12637 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 12638 | highlight_nonselected_windows = 0; |
d39b6696 KH |
12639 | |
12640 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
12641 | "Non-nil if more than one frame is visible on this display.\n\ |
12642 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
12643 | This variable is not guaranteed to be accurate except while processing\n\ |
12644 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
12645 | |
12646 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 12647 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
12648 | \(Assuming the window manager supports this feature.)\n\ |
12649 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12650 | and is used only on frames for which no explicit name has been set\n\ | |
12651 | \(see `modify-frame-parameters')."); | |
12652 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 12653 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
12654 | \(Assuming the window manager supports this feature.)\n\ |
12655 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12656 | and is used only on frames for which no explicit name has been set\n\ | |
12657 | \(see `modify-frame-parameters')."); | |
12658 | Vicon_title_format | |
12659 | = Vframe_title_format | |
12660 | = Fcons (intern ("multiple-frames"), | |
12661 | Fcons (build_string ("%b"), | |
12662 | Fcons (Fcons (build_string (""), | |
12663 | Fcons (intern ("invocation-name"), | |
12664 | Fcons (build_string ("@"), | |
12665 | Fcons (intern ("system-name"), | |
12666 | Qnil)))), | |
12667 | Qnil))); | |
5992c4f7 KH |
12668 | |
12669 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
12670 | "Maximum number of lines to keep in the message log buffer.\n\ | |
12671 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
12672 | the buffer when it becomes large."); | |
12673 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
12674 | |
12675 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
12676 | "Functions called before redisplay, if window sizes have changed.\n\ | |
12677 | The value should be a list of functions that take one argument.\n\ | |
12678 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
12679 | size since the last redisplay, or have been split or deleted,\n\ | |
12680 | all the functions in the list are called, with the frame as argument."); | |
12681 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
12682 | |
12683 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 12684 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 12685 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
12686 | and its new display-start position. Note that the value of `window-end'\n\ |
12687 | is not valid when these functions are called."); | |
75c43375 | 12688 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 GM |
12689 | |
12690 | DEFVAR_BOOL ("auto-resize-toolbars", &auto_resize_toolbars_p, | |
12691 | "*Non-nil means automatically resize toolbars.\n\ | |
12692 | This increases a toolbar's height if not all toolbar items are visible.\n\ | |
12693 | It decreases a toolbar's height when it would display blank lines\n\ | |
12694 | otherwise."); | |
12695 | auto_resize_toolbars_p = 1; | |
12696 | ||
12697 | DEFVAR_BOOL ("auto-raise-toolbar-buttons", &auto_raise_toolbar_buttons_p, | |
12698 | "*Non-nil means raise toolbar buttons when the mouse moves over them."); | |
12699 | auto_raise_toolbar_buttons_p = 1; | |
12700 | ||
12701 | DEFVAR_INT ("toolbar-button-margin", &toolbar_button_margin, | |
12702 | "*Margin around toolbar buttons in pixels."); | |
12703 | toolbar_button_margin = 1; | |
12704 | ||
12705 | DEFVAR_INT ("toolbar-button-relief", &toolbar_button_relief, | |
12706 | "Relief thickness of toolbar buttons."); | |
12707 | toolbar_button_relief = 3; | |
12708 | ||
12709 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
12710 | "List of functions to call to fontify regions of text.\n\ | |
12711 | Each function is called with one argument POS. Functions must\n\ | |
12712 | fontify a region starting at POS in the current buffer, and give\n\ | |
12713 | fontified regions the property `fontified'.\n\ | |
12714 | This variable automatically becomes buffer-local when set."); | |
12715 | Vfontification_functions = Qnil; | |
12716 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
12717 | |
12718 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
12719 | &unibyte_display_via_language_environment, |
12720 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
12721 | Specifically this means that unibyte non-ASCII characters\n\ |
12722 | are displayed by converting them to the equivalent multibyte characters\n\ | |
12723 | according to the current language environment. As a result, they are\n\ | |
12724 | displayed according to the current fontset."); | |
12725 | unibyte_display_via_language_environment = 0; | |
c6e89d6c GM |
12726 | |
12727 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, | |
12728 | "*Maximum height for resizing mini-windows.\n\ | |
12729 | If a float, it specifies a fraction of the mini-window frame's height.\n\ | |
12730 | If an integer, it specifies a number of lines."); | |
12731 | Vmax_mini_window_height = make_float (0.25); | |
a2889657 JB |
12732 | } |
12733 | ||
5f5c8ee5 GM |
12734 | |
12735 | /* Initialize this module when Emacs starts. */ | |
12736 | ||
dfcf069d | 12737 | void |
a2889657 JB |
12738 | init_xdisp () |
12739 | { | |
12740 | Lisp_Object root_window; | |
5f5c8ee5 | 12741 | struct window *mini_w; |
a2889657 | 12742 | |
5f5c8ee5 | 12743 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
12744 | |
12745 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 12746 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 12747 | |
a2889657 JB |
12748 | if (!noninteractive) |
12749 | { | |
5f5c8ee5 GM |
12750 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12751 | int i; | |
12752 | ||
12753 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 12754 | set_window_height (root_window, |
5f5c8ee5 | 12755 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 12756 | 0); |
c2213350 | 12757 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
12758 | set_window_height (minibuf_window, 1, 0); |
12759 | ||
c2213350 KH |
12760 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
12761 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
12762 | |
12763 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
12764 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
12765 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
12766 | ||
12767 | /* The default ellipsis glyphs `...'. */ | |
12768 | for (i = 0; i < 3; ++i) | |
12769 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 12770 | } |
5f5c8ee5 GM |
12771 | |
12772 | #ifdef HAVE_WINDOW_SYSTEM | |
12773 | { | |
12774 | /* Allocate the buffer for frame titles. */ | |
12775 | int size = 100; | |
12776 | frame_title_buf = (char *) xmalloc (size); | |
12777 | frame_title_buf_end = frame_title_buf + size; | |
12778 | frame_title_ptr = NULL; | |
12779 | } | |
12780 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 12781 | } |
5f5c8ee5 GM |
12782 | |
12783 |