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a2889657 | 1 | /* Display generation from window structure and buffer text. |
a0315a63 | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99, 2000 |
5f5c8ee5 | 3 | Free Software Foundation, Inc. |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 | 21 | |
5f5c8ee5 GM |
22 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
23 | ||
24 | Redisplay. | |
25 | ||
26 | Emacs separates the task of updating the display from code | |
27 | modifying global state, e.g. buffer text. This way functions | |
28 | operating on buffers don't also have to be concerned with updating | |
29 | the display. | |
30 | ||
31 | Updating the display is triggered by the Lisp interpreter when it | |
32 | decides it's time to do it. This is done either automatically for | |
33 | you as part of the interpreter's command loop or as the result of | |
34 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
35 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
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> |
a2889657 | 172 | #include "lisp.h" |
546a4f00 | 173 | #include "keyboard.h" |
44fa5b1e | 174 | #include "frame.h" |
a2889657 JB |
175 | #include "window.h" |
176 | #include "termchar.h" | |
177 | #include "dispextern.h" | |
178 | #include "buffer.h" | |
1c9241f5 | 179 | #include "charset.h" |
a2889657 JB |
180 | #include "indent.h" |
181 | #include "commands.h" | |
182 | #include "macros.h" | |
183 | #include "disptab.h" | |
30c566e4 | 184 | #include "termhooks.h" |
b0a0fbda | 185 | #include "intervals.h" |
1c9241f5 KH |
186 | #include "coding.h" |
187 | #include "process.h" | |
dfcf069d | 188 | #include "region-cache.h" |
0ef75e87 | 189 | #include "fontset.h" |
dfcf069d | 190 | |
6d55d620 | 191 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
192 | #include "xterm.h" |
193 | #endif | |
a75dfea0 AI |
194 | #ifdef WINDOWSNT |
195 | #include "w32term.h" | |
196 | #endif | |
a2889657 | 197 | |
5f5c8ee5 GM |
198 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
199 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
200 | ||
201 | #define INFINITY 10000000 | |
202 | ||
8f3343d0 | 203 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
2e621225 | 204 | extern void set_frame_menubar P_ ((struct frame *f, int, int)); |
cd6dfed6 | 205 | extern int pending_menu_activation; |
76412d64 RS |
206 | #endif |
207 | ||
a2889657 JB |
208 | extern int interrupt_input; |
209 | extern int command_loop_level; | |
210 | ||
b6436d4e RS |
211 | extern int minibuffer_auto_raise; |
212 | ||
c4628384 RS |
213 | extern Lisp_Object Qface; |
214 | ||
399164b4 KH |
215 | extern Lisp_Object Voverriding_local_map; |
216 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 217 | extern Lisp_Object Qmenu_item; |
399164b4 | 218 | |
d46fb96a | 219 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 220 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 221 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 222 | Lisp_Object Qinhibit_point_motion_hooks; |
9499d71b | 223 | Lisp_Object QCeval, Qwhen, QCfile, QCdata; |
5f5c8ee5 GM |
224 | Lisp_Object Qfontified; |
225 | ||
226 | /* Functions called to fontify regions of text. */ | |
227 | ||
228 | Lisp_Object Vfontification_functions; | |
229 | Lisp_Object Qfontification_functions; | |
230 | ||
e037b9ec | 231 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
232 | over them. */ |
233 | ||
e037b9ec | 234 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 235 | |
e037b9ec | 236 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 237 | |
e037b9ec | 238 | int tool_bar_button_margin; |
5f5c8ee5 | 239 | |
e037b9ec | 240 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 241 | |
e037b9ec | 242 | int tool_bar_button_relief; |
5f5c8ee5 | 243 | |
e037b9ec | 244 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
245 | items are visible, and no blank lines remain. */ |
246 | ||
e037b9ec | 247 | int auto_resize_tool_bars_p; |
399164b4 | 248 | |
735c094c KH |
249 | /* Non-nil means don't actually do any redisplay. */ |
250 | ||
251 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
252 | ||
5f5c8ee5 GM |
253 | /* Names of text properties relevant for redisplay. */ |
254 | ||
a7e27ef7 DL |
255 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
256 | extern Lisp_Object Qface, Qinvisible, Qimage, Qwidth; | |
5f5c8ee5 GM |
257 | |
258 | /* Symbols used in text property values. */ | |
259 | ||
260 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 261 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 262 | Lisp_Object Qmargin; |
a7e27ef7 | 263 | extern Lisp_Object Qheight; |
5f5c8ee5 | 264 | |
8f897821 | 265 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 266 | |
8f897821 | 267 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
268 | |
269 | /* Name of the face used to highlight trailing whitespace. */ | |
270 | ||
271 | Lisp_Object Qtrailing_whitespace; | |
272 | ||
273 | /* The symbol `image' which is the car of the lists used to represent | |
274 | images in Lisp. */ | |
275 | ||
276 | Lisp_Object Qimage; | |
277 | ||
278 | /* Non-zero means print newline to stdout before next mini-buffer | |
279 | message. */ | |
a2889657 JB |
280 | |
281 | int noninteractive_need_newline; | |
282 | ||
5f5c8ee5 | 283 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 284 | |
3c6595e0 | 285 | static int message_log_need_newline; |
f88eb0b6 | 286 | |
5f5c8ee5 GM |
287 | \f |
288 | /* The buffer position of the first character appearing entirely or | |
289 | partially on the line of the selected window which contains the | |
290 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
291 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 292 | |
5f5c8ee5 | 293 | static struct text_pos this_line_start_pos; |
a2889657 | 294 | |
5f5c8ee5 GM |
295 | /* Number of characters past the end of the line above, including the |
296 | terminating newline. */ | |
297 | ||
298 | static struct text_pos this_line_end_pos; | |
299 | ||
300 | /* The vertical positions and the height of this line. */ | |
a2889657 | 301 | |
a2889657 | 302 | static int this_line_vpos; |
5f5c8ee5 GM |
303 | static int this_line_y; |
304 | static int this_line_pixel_height; | |
305 | ||
306 | /* X position at which this display line starts. Usually zero; | |
307 | negative if first character is partially visible. */ | |
308 | ||
309 | static int this_line_start_x; | |
a2889657 | 310 | |
5f5c8ee5 | 311 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 312 | |
a2889657 JB |
313 | static struct buffer *this_line_buffer; |
314 | ||
5f5c8ee5 GM |
315 | /* Nonzero means truncate lines in all windows less wide than the |
316 | frame. */ | |
a2889657 | 317 | |
a2889657 JB |
318 | int truncate_partial_width_windows; |
319 | ||
7bbe686f | 320 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 321 | |
7bbe686f | 322 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
323 | |
324 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
325 | Not guaranteed to be accurate except while parsing | |
326 | frame-title-format. */ | |
7bbe686f | 327 | |
d39b6696 KH |
328 | int multiple_frames; |
329 | ||
a2889657 JB |
330 | Lisp_Object Vglobal_mode_string; |
331 | ||
332 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 333 | |
a2889657 JB |
334 | Lisp_Object Voverlay_arrow_position; |
335 | ||
5f5c8ee5 GM |
336 | /* String to display for the arrow. Only used on terminal frames. */ |
337 | ||
a2889657 JB |
338 | Lisp_Object Voverlay_arrow_string; |
339 | ||
5f5c8ee5 GM |
340 | /* Values of those variables at last redisplay. However, if |
341 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
342 | numerical position. */ | |
343 | ||
d45de95b RS |
344 | static Lisp_Object last_arrow_position, last_arrow_string; |
345 | ||
5f5c8ee5 GM |
346 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
347 | ||
d39b6696 KH |
348 | Lisp_Object Vframe_title_format; |
349 | ||
5f5c8ee5 GM |
350 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
351 | ||
d39b6696 KH |
352 | Lisp_Object Vicon_title_format; |
353 | ||
08b610e4 RS |
354 | /* List of functions to call when a window's size changes. These |
355 | functions get one arg, a frame on which one or more windows' sizes | |
356 | have changed. */ | |
5f5c8ee5 | 357 | |
08b610e4 RS |
358 | static Lisp_Object Vwindow_size_change_functions; |
359 | ||
cf074754 RS |
360 | Lisp_Object Qmenu_bar_update_hook; |
361 | ||
a2889657 | 362 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 363 | |
5f5c8ee5 | 364 | static int overlay_arrow_seen; |
ca26e1c8 | 365 | |
fba9ce76 | 366 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 367 | |
5f5c8ee5 GM |
368 | int highlight_nonselected_windows; |
369 | ||
370 | /* If cursor motion alone moves point off frame, try scrolling this | |
371 | many lines up or down if that will bring it back. */ | |
372 | ||
14510fee | 373 | static int scroll_step; |
a2889657 | 374 | |
5f5c8ee5 GM |
375 | /* Non-0 means scroll just far enough to bring point back on the |
376 | screen, when appropriate. */ | |
377 | ||
0789adb2 RS |
378 | static int scroll_conservatively; |
379 | ||
5f5c8ee5 GM |
380 | /* Recenter the window whenever point gets within this many lines of |
381 | the top or bottom of the window. This value is translated into a | |
382 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
383 | there is really a fixed pixel height scroll margin. */ | |
384 | ||
9afd2168 RS |
385 | int scroll_margin; |
386 | ||
5f5c8ee5 GM |
387 | /* Number of windows showing the buffer of the selected window (or |
388 | another buffer with the same base buffer). keyboard.c refers to | |
389 | this. */ | |
a2889657 | 390 | |
a2889657 JB |
391 | int buffer_shared; |
392 | ||
5f5c8ee5 | 393 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 394 | |
5f5c8ee5 | 395 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 396 | |
5f5c8ee5 | 397 | /* Nonzero means display mode line highlighted. */ |
a2889657 | 398 | |
a2889657 JB |
399 | int mode_line_inverse_video; |
400 | ||
5f5c8ee5 GM |
401 | /* Prompt to display in front of the mini-buffer contents. */ |
402 | ||
8c5b6a0a | 403 | Lisp_Object minibuf_prompt; |
a2889657 | 404 | |
5f5c8ee5 GM |
405 | /* Width of current mini-buffer prompt. Only set after display_line |
406 | of the line that contains the prompt. */ | |
407 | ||
a2889657 | 408 | int minibuf_prompt_width; |
5f5c8ee5 GM |
409 | int minibuf_prompt_pixel_width; |
410 | ||
5f5c8ee5 GM |
411 | /* This is the window where the echo area message was displayed. It |
412 | is always a mini-buffer window, but it may not be the same window | |
413 | currently active as a mini-buffer. */ | |
414 | ||
73af359d RS |
415 | Lisp_Object echo_area_window; |
416 | ||
c6e89d6c GM |
417 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
418 | pushes the current message and the value of | |
419 | message_enable_multibyte on the stack, the function restore_message | |
420 | pops the stack and displays MESSAGE again. */ | |
421 | ||
422 | Lisp_Object Vmessage_stack; | |
423 | ||
a3788d53 RS |
424 | /* Nonzero means multibyte characters were enabled when the echo area |
425 | message was specified. */ | |
5f5c8ee5 | 426 | |
a3788d53 RS |
427 | int message_enable_multibyte; |
428 | ||
5f5c8ee5 GM |
429 | /* True if we should redraw the mode lines on the next redisplay. */ |
430 | ||
a2889657 JB |
431 | int update_mode_lines; |
432 | ||
5f5c8ee5 GM |
433 | /* Nonzero if window sizes or contents have changed since last |
434 | redisplay that finished */ | |
435 | ||
a2889657 JB |
436 | int windows_or_buffers_changed; |
437 | ||
5f5c8ee5 GM |
438 | /* Nonzero after display_mode_line if %l was used and it displayed a |
439 | line number. */ | |
440 | ||
aa6d10fa RS |
441 | int line_number_displayed; |
442 | ||
443 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 444 | |
090703f4 | 445 | Lisp_Object Vline_number_display_limit; |
5992c4f7 | 446 | |
5d121aec KH |
447 | /* line width to consider when repostioning for line number display */ |
448 | ||
449 | static int line_number_display_limit_width; | |
450 | ||
5f5c8ee5 GM |
451 | /* Number of lines to keep in the message log buffer. t means |
452 | infinite. nil means don't log at all. */ | |
453 | ||
5992c4f7 | 454 | Lisp_Object Vmessage_log_max; |
d45de95b | 455 | |
6a94510a GM |
456 | /* The name of the *Messages* buffer, a string. */ |
457 | ||
458 | static Lisp_Object Vmessages_buffer_name; | |
459 | ||
c6e89d6c GM |
460 | /* Current, index 0, and last displayed echo area message. Either |
461 | buffers from echo_buffers, or nil to indicate no message. */ | |
462 | ||
463 | Lisp_Object echo_area_buffer[2]; | |
464 | ||
465 | /* The buffers referenced from echo_area_buffer. */ | |
466 | ||
467 | static Lisp_Object echo_buffer[2]; | |
468 | ||
469 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
470 | ||
471 | static Lisp_Object Vwith_echo_area_save_vector; | |
472 | ||
473 | /* Non-zero means display_echo_area should display the last echo area | |
474 | message again. Set by redisplay_preserve_echo_area. */ | |
475 | ||
476 | static int display_last_displayed_message_p; | |
477 | ||
478 | /* Nonzero if echo area is being used by print; zero if being used by | |
479 | message. */ | |
480 | ||
481 | int message_buf_print; | |
482 | ||
9142dd5b GM |
483 | /* Maximum height for resizing mini-windows. Either a float |
484 | specifying a fraction of the available height, or an integer | |
485 | specifying a number of lines. */ | |
c6e89d6c | 486 | |
ad4f174e GM |
487 | Lisp_Object Vmax_mini_window_height; |
488 | ||
489 | /* Non-zero means messages should be displayed with truncated | |
490 | lines instead of being continued. */ | |
491 | ||
492 | int message_truncate_lines; | |
493 | Lisp_Object Qmessage_truncate_lines; | |
c6e89d6c | 494 | |
d6d26ed3 GM |
495 | /* Non-zero means we want a hollow cursor in windows that are not |
496 | selected. Zero means there's no cursor in such windows. */ | |
497 | ||
498 | int cursor_in_non_selected_windows; | |
499 | ||
5f5c8ee5 GM |
500 | /* A scratch glyph row with contents used for generating truncation |
501 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 502 | |
5f5c8ee5 GM |
503 | #define MAX_SCRATCH_GLYPHS 100 |
504 | struct glyph_row scratch_glyph_row; | |
505 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 506 | |
5f5c8ee5 GM |
507 | /* Ascent and height of the last line processed by move_it_to. */ |
508 | ||
509 | static int last_max_ascent, last_height; | |
510 | ||
511 | /* The maximum distance to look ahead for text properties. Values | |
512 | that are too small let us call compute_char_face and similar | |
513 | functions too often which is expensive. Values that are too large | |
514 | let us call compute_char_face and alike too often because we | |
515 | might not be interested in text properties that far away. */ | |
516 | ||
517 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
518 | ||
47589c8c GM |
519 | #if GLYPH_DEBUG |
520 | ||
5f5c8ee5 GM |
521 | /* Non-zero means print traces of redisplay if compiled with |
522 | GLYPH_DEBUG != 0. */ | |
523 | ||
5f5c8ee5 | 524 | int trace_redisplay_p; |
47589c8c | 525 | |
546a4f00 | 526 | #endif /* GLYPH_DEBUG */ |
47589c8c | 527 | |
546a4f00 AI |
528 | #ifdef DEBUG_TRACE_MOVE |
529 | /* Non-zero means trace with TRACE_MOVE to stderr. */ | |
47589c8c GM |
530 | int trace_move; |
531 | ||
47589c8c GM |
532 | #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0 |
533 | #else | |
91c3f500 | 534 | #define TRACE_MOVE(x) (void) 0 |
5f5c8ee5 | 535 | #endif |
546a4f00 | 536 | |
d475bcb8 GM |
537 | /* Non-zero means automatically scroll windows horizontally to make |
538 | point visible. */ | |
539 | ||
540 | int automatic_hscrolling_p; | |
541 | ||
e00daaa0 GM |
542 | /* A list of symbols, one for each supported image type. */ |
543 | ||
544 | Lisp_Object Vimage_types; | |
545 | ||
5f5c8ee5 GM |
546 | /* Value returned from text property handlers (see below). */ |
547 | ||
548 | enum prop_handled | |
3c6595e0 | 549 | { |
5f5c8ee5 GM |
550 | HANDLED_NORMALLY, |
551 | HANDLED_RECOMPUTE_PROPS, | |
552 | HANDLED_OVERLAY_STRING_CONSUMED, | |
553 | HANDLED_RETURN | |
554 | }; | |
3c6595e0 | 555 | |
5f5c8ee5 GM |
556 | /* A description of text properties that redisplay is interested |
557 | in. */ | |
3c6595e0 | 558 | |
5f5c8ee5 GM |
559 | struct props |
560 | { | |
561 | /* The name of the property. */ | |
562 | Lisp_Object *name; | |
90adcf20 | 563 | |
5f5c8ee5 GM |
564 | /* A unique index for the property. */ |
565 | enum prop_idx idx; | |
566 | ||
567 | /* A handler function called to set up iterator IT from the property | |
568 | at IT's current position. Value is used to steer handle_stop. */ | |
569 | enum prop_handled (*handler) P_ ((struct it *it)); | |
570 | }; | |
571 | ||
572 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
573 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
574 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 575 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
576 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
577 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
578 | ||
579 | /* Properties handled by iterators. */ | |
580 | ||
581 | static struct props it_props[] = | |
5992c4f7 | 582 | { |
5f5c8ee5 GM |
583 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
584 | /* Handle `face' before `display' because some sub-properties of | |
585 | `display' need to know the face. */ | |
586 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
587 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
588 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 589 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
590 | {NULL, 0, NULL} |
591 | }; | |
5992c4f7 | 592 | |
5f5c8ee5 GM |
593 | /* Value is the position described by X. If X is a marker, value is |
594 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 595 | |
5f5c8ee5 | 596 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 597 | |
5f5c8ee5 | 598 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 599 | |
5f5c8ee5 GM |
600 | enum move_it_result |
601 | { | |
602 | /* Not used. Undefined value. */ | |
603 | MOVE_UNDEFINED, | |
bab29e15 | 604 | |
5f5c8ee5 GM |
605 | /* Move ended at the requested buffer position or ZV. */ |
606 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 607 | |
5f5c8ee5 GM |
608 | /* Move ended at the requested X pixel position. */ |
609 | MOVE_X_REACHED, | |
12adba34 | 610 | |
5f5c8ee5 GM |
611 | /* Move within a line ended at the end of a line that must be |
612 | continued. */ | |
613 | MOVE_LINE_CONTINUED, | |
614 | ||
615 | /* Move within a line ended at the end of a line that would | |
616 | be displayed truncated. */ | |
617 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 618 | |
5f5c8ee5 GM |
619 | /* Move within a line ended at a line end. */ |
620 | MOVE_NEWLINE_OR_CR | |
621 | }; | |
12adba34 | 622 | |
ff6c30e5 | 623 | |
5f5c8ee5 GM |
624 | \f |
625 | /* Function prototypes. */ | |
626 | ||
715e84c9 | 627 | static int redisplay_mode_lines P_ ((Lisp_Object, int)); |
2e621225 GM |
628 | static char *decode_mode_spec_coding P_ ((Lisp_Object, char *, int)); |
629 | static int invisible_text_between_p P_ ((struct it *, int, int)); | |
630 | static int next_element_from_ellipsis P_ ((struct it *)); | |
631 | static void pint2str P_ ((char *, int, int)); | |
632 | static struct text_pos run_window_scroll_functions P_ ((Lisp_Object, | |
633 | struct text_pos)); | |
634 | static void reconsider_clip_changes P_ ((struct window *, struct buffer *)); | |
635 | static int text_outside_line_unchanged_p P_ ((struct window *, int, int)); | |
636 | static void store_frame_title_char P_ ((char)); | |
637 | static int store_frame_title P_ ((unsigned char *, int, int)); | |
638 | static void x_consider_frame_title P_ ((Lisp_Object)); | |
639 | static void handle_stop P_ ((struct it *)); | |
640 | static int tool_bar_lines_needed P_ ((struct frame *)); | |
06568bbf | 641 | static int single_display_prop_intangible_p P_ ((Lisp_Object)); |
5bcfeb49 | 642 | static void ensure_echo_area_buffers P_ ((void)); |
e037b9ec GM |
643 | static struct glyph_row *row_containing_pos P_ ((struct window *, int, |
644 | struct glyph_row *, | |
645 | struct glyph_row *)); | |
c6e89d6c GM |
646 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
647 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
23a96c77 | 648 | static int with_echo_area_buffer P_ ((struct window *, int, |
23dd2d97 KR |
649 | int (*) (EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT), |
650 | EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 651 | static void clear_garbaged_frames P_ ((void)); |
23dd2d97 KR |
652 | static int current_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
653 | static int truncate_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
654 | static int set_message_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
c6e89d6c | 655 | static int display_echo_area P_ ((struct window *)); |
23dd2d97 KR |
656 | static int display_echo_area_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
657 | static int resize_mini_window_1 P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); | |
28514cd9 | 658 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 659 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
660 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
661 | struct text_pos)); | |
662 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
663 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
5f5c8ee5 GM |
664 | static void insert_left_trunc_glyphs P_ ((struct it *)); |
665 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
666 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 667 | static int append_space P_ ((struct it *, int)); |
5f5c8ee5 GM |
668 | static void make_cursor_line_fully_visible P_ ((struct window *)); |
669 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
47589c8c | 670 | static int try_cursor_movement P_ ((Lisp_Object, struct text_pos, int *)); |
5f5c8ee5 GM |
671 | static int trailing_whitespace_p P_ ((int)); |
672 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
673 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
674 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
675 | static void push_it P_ ((struct it *)); | |
676 | static void pop_it P_ ((struct it *)); | |
677 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
678 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 679 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
680 | static void redisplay_windows P_ ((Lisp_Object)); |
681 | static void redisplay_window P_ ((Lisp_Object, int)); | |
682 | static void update_menu_bar P_ ((struct frame *, int)); | |
683 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
684 | static int try_window_id P_ ((struct window *)); | |
685 | static int display_line P_ ((struct it *)); | |
715e84c9 | 686 | static int display_mode_lines P_ ((struct window *)); |
5f5c8ee5 GM |
687 | static void display_mode_line P_ ((struct window *, enum face_id, |
688 | Lisp_Object)); | |
689 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
68c45bf0 | 690 | static char *decode_mode_spec P_ ((struct window *, int, int, int)); |
5f5c8ee5 GM |
691 | static void display_menu_bar P_ ((struct window *)); |
692 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
693 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
694 | int, int, struct it *, int, int, int, int)); | |
695 | static void compute_line_metrics P_ ((struct it *)); | |
696 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
697 | static int get_overlay_strings P_ ((struct it *)); | |
698 | static void next_overlay_string P_ ((struct it *)); | |
699 | void set_iterator_to_next P_ ((struct it *)); | |
700 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
701 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
702 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
703 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 704 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
705 | static int next_element_from_display_vector P_ ((struct it *)); |
706 | static int next_element_from_string P_ ((struct it *)); | |
707 | static int next_element_from_c_string P_ ((struct it *)); | |
708 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 709 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
710 | static int next_element_from_image P_ ((struct it *)); |
711 | static int next_element_from_stretch P_ ((struct it *)); | |
712 | static void load_overlay_strings P_ ((struct it *)); | |
713 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
714 | struct display_pos *)); | |
715 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
716 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
717 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
718 | int, int, int)); | |
719 | void move_it_vertically_backward P_ ((struct it *, int)); | |
720 | static void init_to_row_start P_ ((struct it *, struct window *, | |
721 | struct glyph_row *)); | |
722 | static void init_to_row_end P_ ((struct it *, struct window *, | |
723 | struct glyph_row *)); | |
724 | static void back_to_previous_line_start P_ ((struct it *)); | |
725 | static void forward_to_next_line_start P_ ((struct it *)); | |
726 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
727 | Lisp_Object, int)); | |
728 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
729 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
730 | static int number_of_chars P_ ((unsigned char *, int)); | |
731 | static void compute_stop_pos P_ ((struct it *)); | |
732 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
733 | Lisp_Object)); | |
734 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
735 | static int next_overlay_change P_ ((int)); | |
736 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
737 | Lisp_Object, struct text_pos *)); | |
738 | ||
739 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
740 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 741 | |
5f5c8ee5 | 742 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 743 | |
e037b9ec GM |
744 | static void update_tool_bar P_ ((struct frame *, int)); |
745 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
746 | static int redisplay_tool_bar P_ ((struct frame *)); | |
747 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 748 | |
5f5c8ee5 | 749 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 750 | |
5f5c8ee5 GM |
751 | \f |
752 | /*********************************************************************** | |
753 | Window display dimensions | |
754 | ***********************************************************************/ | |
12adba34 | 755 | |
5f5c8ee5 GM |
756 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
757 | text in window W. This is the height of W minus the height of a | |
758 | mode line, if any. */ | |
759 | ||
760 | INLINE int | |
761 | window_text_bottom_y (w) | |
762 | struct window *w; | |
763 | { | |
764 | struct frame *f = XFRAME (w->frame); | |
765 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
766 | ||
767 | if (WINDOW_WANTS_MODELINE_P (w)) | |
768 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
769 | return height; | |
f88eb0b6 KH |
770 | } |
771 | ||
f82aff7c | 772 | |
5f5c8ee5 GM |
773 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
774 | means return the total width of W, not including bitmap areas to | |
775 | the left and right of the window. */ | |
ff6c30e5 | 776 | |
5f5c8ee5 GM |
777 | INLINE int |
778 | window_box_width (w, area) | |
779 | struct window *w; | |
780 | int area; | |
781 | { | |
782 | struct frame *f = XFRAME (w->frame); | |
783 | int width = XFASTINT (w->width); | |
784 | ||
785 | if (!w->pseudo_window_p) | |
ff6c30e5 | 786 | { |
050d82d7 | 787 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FLAGS_AREA_COLS (f); |
5f5c8ee5 GM |
788 | |
789 | if (area == TEXT_AREA) | |
790 | { | |
791 | if (INTEGERP (w->left_margin_width)) | |
792 | width -= XFASTINT (w->left_margin_width); | |
793 | if (INTEGERP (w->right_margin_width)) | |
794 | width -= XFASTINT (w->right_margin_width); | |
795 | } | |
796 | else if (area == LEFT_MARGIN_AREA) | |
797 | width = (INTEGERP (w->left_margin_width) | |
798 | ? XFASTINT (w->left_margin_width) : 0); | |
799 | else if (area == RIGHT_MARGIN_AREA) | |
800 | width = (INTEGERP (w->right_margin_width) | |
801 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 802 | } |
5f5c8ee5 GM |
803 | |
804 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 805 | } |
1adc55de | 806 | |
1adc55de | 807 | |
5f5c8ee5 GM |
808 | /* Return the pixel height of the display area of window W, not |
809 | including mode lines of W, if any.. */ | |
f88eb0b6 | 810 | |
5f5c8ee5 GM |
811 | INLINE int |
812 | window_box_height (w) | |
813 | struct window *w; | |
f88eb0b6 | 814 | { |
5f5c8ee5 GM |
815 | struct frame *f = XFRAME (w->frame); |
816 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
817 | ||
818 | if (WINDOW_WANTS_MODELINE_P (w)) | |
819 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
820 | ||
045dee35 GM |
821 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
822 | height -= CURRENT_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
823 | |
824 | return height; | |
5992c4f7 KH |
825 | } |
826 | ||
827 | ||
5f5c8ee5 GM |
828 | /* Return the frame-relative coordinate of the left edge of display |
829 | area AREA of window W. AREA < 0 means return the left edge of the | |
830 | whole window, to the right of any bitmap area at the left side of | |
831 | W. */ | |
5992c4f7 | 832 | |
5f5c8ee5 GM |
833 | INLINE int |
834 | window_box_left (w, area) | |
835 | struct window *w; | |
836 | int area; | |
90adcf20 | 837 | { |
5f5c8ee5 GM |
838 | struct frame *f = XFRAME (w->frame); |
839 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 840 | |
5f5c8ee5 | 841 | if (!w->pseudo_window_p) |
90adcf20 | 842 | { |
5f5c8ee5 | 843 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
050d82d7 | 844 | + FRAME_LEFT_FLAGS_AREA_WIDTH (f)); |
5f5c8ee5 GM |
845 | |
846 | if (area == TEXT_AREA) | |
847 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
848 | else if (area == RIGHT_MARGIN_AREA) | |
849 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
850 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 851 | } |
73af359d | 852 | |
5f5c8ee5 GM |
853 | return x; |
854 | } | |
90adcf20 | 855 | |
b6436d4e | 856 | |
5f5c8ee5 GM |
857 | /* Return the frame-relative coordinate of the right edge of display |
858 | area AREA of window W. AREA < 0 means return the left edge of the | |
859 | whole window, to the left of any bitmap area at the right side of | |
860 | W. */ | |
ded34426 | 861 | |
5f5c8ee5 GM |
862 | INLINE int |
863 | window_box_right (w, area) | |
864 | struct window *w; | |
865 | int area; | |
866 | { | |
867 | return window_box_left (w, area) + window_box_width (w, area); | |
868 | } | |
869 | ||
870 | ||
871 | /* Get the bounding box of the display area AREA of window W, without | |
872 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
873 | whole window, not including bitmap areas to the left and right of | |
874 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
875 | coordinates of the upper-left corner of the box. Return in | |
876 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
877 | ||
878 | INLINE void | |
879 | window_box (w, area, box_x, box_y, box_width, box_height) | |
880 | struct window *w; | |
881 | int area; | |
882 | int *box_x, *box_y, *box_width, *box_height; | |
883 | { | |
884 | struct frame *f = XFRAME (w->frame); | |
885 | ||
886 | *box_width = window_box_width (w, area); | |
887 | *box_height = window_box_height (w); | |
888 | *box_x = window_box_left (w, area); | |
889 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
890 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
891 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
892 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 893 | } |
1adc55de | 894 | |
1adc55de | 895 | |
5f5c8ee5 GM |
896 | /* Get the bounding box of the display area AREA of window W, without |
897 | mode lines. AREA < 0 means the whole window, not including bitmap | |
898 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
899 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
900 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
901 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
902 | box. */ | |
ded34426 | 903 | |
5f5c8ee5 GM |
904 | INLINE void |
905 | window_box_edges (w, area, top_left_x, top_left_y, | |
906 | bottom_right_x, bottom_right_y) | |
907 | struct window *w; | |
908 | int area; | |
909 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 910 | { |
5f5c8ee5 GM |
911 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
912 | bottom_right_y); | |
913 | *bottom_right_x += *top_left_x; | |
914 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
915 | } |
916 | ||
5f5c8ee5 GM |
917 | |
918 | \f | |
919 | /*********************************************************************** | |
920 | Utilities | |
921 | ***********************************************************************/ | |
922 | ||
4fdb80f2 GM |
923 | /* Return the next character from STR which is MAXLEN bytes long. |
924 | Return in *LEN the length of the character. This is like | |
925 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
9ab8560d | 926 | we find one, we return a `?', but with the length of the invalid |
4fdb80f2 GM |
927 | character. */ |
928 | ||
929 | static INLINE int | |
7a5b8a93 | 930 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 931 | unsigned char *str; |
7a5b8a93 | 932 | int maxlen, *len; |
4fdb80f2 GM |
933 | { |
934 | int c; | |
935 | ||
936 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
937 | if (!CHAR_VALID_P (c, 1)) | |
938 | /* We may not change the length here because other places in Emacs | |
9ab8560d | 939 | don't use this function, i.e. they silently accept invalid |
4fdb80f2 GM |
940 | characters. */ |
941 | c = '?'; | |
942 | ||
943 | return c; | |
944 | } | |
945 | ||
946 | ||
947 | ||
5f5c8ee5 GM |
948 | /* Given a position POS containing a valid character and byte position |
949 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
950 | ||
951 | static struct text_pos | |
952 | string_pos_nchars_ahead (pos, string, nchars) | |
953 | struct text_pos pos; | |
954 | Lisp_Object string; | |
955 | int nchars; | |
0b1005ef | 956 | { |
5f5c8ee5 GM |
957 | xassert (STRINGP (string) && nchars >= 0); |
958 | ||
959 | if (STRING_MULTIBYTE (string)) | |
960 | { | |
961 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
962 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
963 | int len; | |
964 | ||
965 | while (nchars--) | |
966 | { | |
4fdb80f2 | 967 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
968 | p += len, rest -= len; |
969 | xassert (rest >= 0); | |
970 | CHARPOS (pos) += 1; | |
971 | BYTEPOS (pos) += len; | |
972 | } | |
973 | } | |
974 | else | |
975 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
976 | ||
977 | return pos; | |
0a9dc68b RS |
978 | } |
979 | ||
0a9dc68b | 980 | |
5f5c8ee5 GM |
981 | /* Value is the text position, i.e. character and byte position, |
982 | for character position CHARPOS in STRING. */ | |
983 | ||
984 | static INLINE struct text_pos | |
985 | string_pos (charpos, string) | |
986 | int charpos; | |
0a9dc68b | 987 | Lisp_Object string; |
0a9dc68b | 988 | { |
5f5c8ee5 GM |
989 | struct text_pos pos; |
990 | xassert (STRINGP (string)); | |
991 | xassert (charpos >= 0); | |
992 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
993 | return pos; | |
994 | } | |
995 | ||
996 | ||
997 | /* Value is a text position, i.e. character and byte position, for | |
998 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
999 | means recognize multibyte characters. */ | |
1000 | ||
1001 | static struct text_pos | |
1002 | c_string_pos (charpos, s, multibyte_p) | |
1003 | int charpos; | |
1004 | unsigned char *s; | |
1005 | int multibyte_p; | |
1006 | { | |
1007 | struct text_pos pos; | |
1008 | ||
1009 | xassert (s != NULL); | |
1010 | xassert (charpos >= 0); | |
1011 | ||
1012 | if (multibyte_p) | |
0a9dc68b | 1013 | { |
5f5c8ee5 GM |
1014 | int rest = strlen (s), len; |
1015 | ||
1016 | SET_TEXT_POS (pos, 0, 0); | |
1017 | while (charpos--) | |
0a9dc68b | 1018 | { |
4fdb80f2 | 1019 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
1020 | s += len, rest -= len; |
1021 | xassert (rest >= 0); | |
1022 | CHARPOS (pos) += 1; | |
1023 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
1024 | } |
1025 | } | |
5f5c8ee5 GM |
1026 | else |
1027 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 1028 | |
5f5c8ee5 GM |
1029 | return pos; |
1030 | } | |
0a9dc68b | 1031 | |
0a9dc68b | 1032 | |
5f5c8ee5 GM |
1033 | /* Value is the number of characters in C string S. MULTIBYTE_P |
1034 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 1035 | |
5f5c8ee5 GM |
1036 | static int |
1037 | number_of_chars (s, multibyte_p) | |
1038 | unsigned char *s; | |
1039 | int multibyte_p; | |
1040 | { | |
1041 | int nchars; | |
1042 | ||
1043 | if (multibyte_p) | |
1044 | { | |
1045 | int rest = strlen (s), len; | |
1046 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 1047 | |
5f5c8ee5 GM |
1048 | for (nchars = 0; rest > 0; ++nchars) |
1049 | { | |
4fdb80f2 | 1050 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1051 | rest -= len, p += len; |
0a9dc68b RS |
1052 | } |
1053 | } | |
5f5c8ee5 GM |
1054 | else |
1055 | nchars = strlen (s); | |
1056 | ||
1057 | return nchars; | |
0b1005ef KH |
1058 | } |
1059 | ||
5f5c8ee5 GM |
1060 | |
1061 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1062 | NEWPOS->charpos. POS is a known position in string STRING. | |
1063 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1064 | |
5f5c8ee5 GM |
1065 | static void |
1066 | compute_string_pos (newpos, pos, string) | |
1067 | struct text_pos *newpos, pos; | |
1068 | Lisp_Object string; | |
76412d64 | 1069 | { |
5f5c8ee5 GM |
1070 | xassert (STRINGP (string)); |
1071 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1072 | ||
1073 | if (STRING_MULTIBYTE (string)) | |
6fc556fd KR |
1074 | *newpos = string_pos_nchars_ahead (pos, string, |
1075 | CHARPOS (*newpos) - CHARPOS (pos)); | |
5f5c8ee5 GM |
1076 | else |
1077 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1078 | } |
1079 | ||
9c74a0dd | 1080 | |
5f5c8ee5 GM |
1081 | \f |
1082 | /*********************************************************************** | |
1083 | Lisp form evaluation | |
1084 | ***********************************************************************/ | |
1085 | ||
0d8b31c0 | 1086 | /* Error handler for eval_form and call_function. */ |
5f5c8ee5 GM |
1087 | |
1088 | static Lisp_Object | |
1089 | eval_handler (arg) | |
1090 | Lisp_Object arg; | |
1091 | { | |
1092 | return Qnil; | |
1093 | } | |
1094 | ||
1095 | ||
1096 | /* Evaluate SEXPR and return the result, or nil if something went | |
1097 | wrong. */ | |
1098 | ||
71e5b1b8 | 1099 | Lisp_Object |
5f5c8ee5 GM |
1100 | eval_form (sexpr) |
1101 | Lisp_Object sexpr; | |
1102 | { | |
1103 | int count = specpdl_ptr - specpdl; | |
0d8b31c0 | 1104 | struct gcpro gcpro1; |
5f5c8ee5 | 1105 | Lisp_Object val; |
0d8b31c0 GM |
1106 | |
1107 | GCPRO1 (sexpr); | |
5f5c8ee5 GM |
1108 | specbind (Qinhibit_redisplay, Qt); |
1109 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
0d8b31c0 GM |
1110 | UNGCPRO; |
1111 | return unbind_to (count, val); | |
1112 | } | |
1113 | ||
1114 | ||
1115 | /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1]. | |
1116 | Return the result, or nil if something went wrong. */ | |
1117 | ||
1118 | Lisp_Object | |
1119 | call_function (nargs, args) | |
1120 | int nargs; | |
1121 | Lisp_Object *args; | |
1122 | { | |
1123 | int count = specpdl_ptr - specpdl; | |
1124 | Lisp_Object val; | |
1125 | struct gcpro gcpro1; | |
1126 | ||
1127 | GCPRO1 (args[0]); | |
1128 | gcpro1.nvars = nargs; | |
1129 | specbind (Qinhibit_redisplay, Qt); | |
1130 | val = internal_condition_case_2 (Ffuncall, nargs, args, Qerror, | |
1131 | eval_handler); | |
1132 | UNGCPRO; | |
5f5c8ee5 GM |
1133 | return unbind_to (count, val); |
1134 | } | |
1135 | ||
1136 | ||
1137 | \f | |
1138 | /*********************************************************************** | |
1139 | Debugging | |
1140 | ***********************************************************************/ | |
1141 | ||
1142 | #if 0 | |
1143 | ||
1144 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1145 | This is for debugging. It is too slow to do unconditionally. */ | |
1146 | ||
1147 | static void | |
1148 | check_it (it) | |
1149 | struct it *it; | |
1150 | { | |
1151 | if (it->method == next_element_from_string) | |
a2889657 | 1152 | { |
5f5c8ee5 GM |
1153 | xassert (STRINGP (it->string)); |
1154 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1155 | } | |
1156 | else if (it->method == next_element_from_buffer) | |
1157 | { | |
1158 | /* Check that character and byte positions agree. */ | |
1159 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1160 | } | |
73af359d | 1161 | |
5f5c8ee5 GM |
1162 | if (it->dpvec) |
1163 | xassert (it->current.dpvec_index >= 0); | |
1164 | else | |
1165 | xassert (it->current.dpvec_index < 0); | |
1166 | } | |
1f40cad2 | 1167 | |
5f5c8ee5 GM |
1168 | #define CHECK_IT(IT) check_it ((IT)) |
1169 | ||
1170 | #else /* not 0 */ | |
1171 | ||
1172 | #define CHECK_IT(IT) (void) 0 | |
1173 | ||
1174 | #endif /* not 0 */ | |
1175 | ||
1176 | ||
1177 | #if GLYPH_DEBUG | |
1178 | ||
1179 | /* Check that the window end of window W is what we expect it | |
1180 | to be---the last row in the current matrix displaying text. */ | |
1181 | ||
1182 | static void | |
1183 | check_window_end (w) | |
1184 | struct window *w; | |
1185 | { | |
1186 | if (!MINI_WINDOW_P (w) | |
1187 | && !NILP (w->window_end_valid)) | |
1188 | { | |
1189 | struct glyph_row *row; | |
1190 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1191 | XFASTINT (w->window_end_vpos)), | |
1192 | !row->enabled_p | |
1193 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1194 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1199 | ||
1200 | #else /* not GLYPH_DEBUG */ | |
1201 | ||
1202 | #define CHECK_WINDOW_END(W) (void) 0 | |
1203 | ||
1204 | #endif /* not GLYPH_DEBUG */ | |
1205 | ||
1206 | ||
1207 | \f | |
1208 | /*********************************************************************** | |
1209 | Iterator initialization | |
1210 | ***********************************************************************/ | |
1211 | ||
1212 | /* Initialize IT for displaying current_buffer in window W, starting | |
1213 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1214 | position is specified which is useful when the iterator is assigned | |
1215 | a position later. BYTEPOS is the byte position corresponding to | |
1216 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1217 | ||
1218 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1219 | will produce glyphs in that row. | |
1220 | ||
1221 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1222 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
045dee35 | 1223 | HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for |
e037b9ec | 1224 | displaying the tool-bar. |
5f5c8ee5 GM |
1225 | |
1226 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
045dee35 | 1227 | HEADER_LINE_FACE_ID, the iterator will be initialized to use the |
5f5c8ee5 GM |
1228 | corresponding mode line glyph row of the desired matrix of W. */ |
1229 | ||
1230 | void | |
1231 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1232 | struct it *it; | |
1233 | struct window *w; | |
1234 | int charpos, bytepos; | |
1235 | struct glyph_row *row; | |
1236 | enum face_id base_face_id; | |
1237 | { | |
1238 | int highlight_region_p; | |
5f5c8ee5 GM |
1239 | |
1240 | /* Some precondition checks. */ | |
1241 | xassert (w != NULL && it != NULL); | |
5f5c8ee5 GM |
1242 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); |
1243 | ||
1244 | /* If face attributes have been changed since the last redisplay, | |
1245 | free realized faces now because they depend on face definitions | |
1246 | that might have changed. */ | |
1247 | if (face_change_count) | |
1248 | { | |
1249 | face_change_count = 0; | |
1250 | free_all_realized_faces (Qnil); | |
1251 | } | |
1252 | ||
1253 | /* Use one of the mode line rows of W's desired matrix if | |
1254 | appropriate. */ | |
1255 | if (row == NULL) | |
1256 | { | |
1257 | if (base_face_id == MODE_LINE_FACE_ID) | |
1258 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
045dee35 GM |
1259 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1260 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1261 | } |
1262 | ||
1263 | /* Clear IT. */ | |
1264 | bzero (it, sizeof *it); | |
1265 | it->current.overlay_string_index = -1; | |
1266 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1267 | it->base_face_id = base_face_id; |
1268 | ||
1269 | /* The window in which we iterate over current_buffer: */ | |
1270 | XSETWINDOW (it->window, w); | |
1271 | it->w = w; | |
1272 | it->f = XFRAME (w->frame); | |
1273 | ||
d475bcb8 GM |
1274 | /* Extra space between lines (on window systems only). */ |
1275 | if (base_face_id == DEFAULT_FACE_ID | |
1276 | && FRAME_WINDOW_P (it->f)) | |
1277 | { | |
1278 | if (NATNUMP (current_buffer->extra_line_spacing)) | |
1279 | it->extra_line_spacing = XFASTINT (current_buffer->extra_line_spacing); | |
1280 | else if (it->f->extra_line_spacing > 0) | |
1281 | it->extra_line_spacing = it->f->extra_line_spacing; | |
1282 | } | |
1283 | ||
5f5c8ee5 GM |
1284 | /* If realized faces have been removed, e.g. because of face |
1285 | attribute changes of named faces, recompute them. */ | |
1286 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1287 | recompute_basic_faces (it->f); | |
1288 | ||
5f5c8ee5 GM |
1289 | /* Current value of the `space-width', and 'height' properties. */ |
1290 | it->space_width = Qnil; | |
1291 | it->font_height = Qnil; | |
1292 | ||
1293 | /* Are control characters displayed as `^C'? */ | |
1294 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1295 | ||
1296 | /* -1 means everything between a CR and the following line end | |
1297 | is invisible. >0 means lines indented more than this value are | |
1298 | invisible. */ | |
1299 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1300 | ? XFASTINT (current_buffer->selective_display) | |
1301 | : (!NILP (current_buffer->selective_display) | |
1302 | ? -1 : 0)); | |
1303 | it->selective_display_ellipsis_p | |
1304 | = !NILP (current_buffer->selective_display_ellipses); | |
1305 | ||
1306 | /* Display table to use. */ | |
1307 | it->dp = window_display_table (w); | |
1308 | ||
1309 | /* Are multibyte characters enabled in current_buffer? */ | |
1310 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1311 | ||
1312 | /* Non-zero if we should highlight the region. */ | |
1313 | highlight_region_p | |
1314 | = (!NILP (Vtransient_mark_mode) | |
1315 | && !NILP (current_buffer->mark_active) | |
1316 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1317 | ||
1318 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1319 | start and end of a visible region in window IT->w. Set both to | |
1320 | -1 to indicate no region. */ | |
1321 | if (highlight_region_p | |
1322 | /* Maybe highlight only in selected window. */ | |
1323 | && (/* Either show region everywhere. */ | |
1324 | highlight_nonselected_windows | |
1325 | /* Or show region in the selected window. */ | |
1326 | || w == XWINDOW (selected_window) | |
1327 | /* Or show the region if we are in the mini-buffer and W is | |
1328 | the window the mini-buffer refers to. */ | |
1329 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1330 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1331 | { | |
1332 | int charpos = marker_position (current_buffer->mark); | |
1333 | it->region_beg_charpos = min (PT, charpos); | |
1334 | it->region_end_charpos = max (PT, charpos); | |
1335 | } | |
1336 | else | |
1337 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1338 | ||
1339 | /* Get the position at which the redisplay_end_trigger hook should | |
1340 | be run, if it is to be run at all. */ | |
1341 | if (MARKERP (w->redisplay_end_trigger) | |
1342 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1343 | it->redisplay_end_trigger_charpos | |
1344 | = marker_position (w->redisplay_end_trigger); | |
1345 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1346 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1347 | ||
1348 | /* Correct bogus values of tab_width. */ | |
1349 | it->tab_width = XINT (current_buffer->tab_width); | |
1350 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1351 | it->tab_width = 8; | |
1352 | ||
1353 | /* Are lines in the display truncated? */ | |
1354 | it->truncate_lines_p | |
1355 | = (base_face_id != DEFAULT_FACE_ID | |
1356 | || XINT (it->w->hscroll) | |
1357 | || (truncate_partial_width_windows | |
1358 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1359 | || !NILP (current_buffer->truncate_lines)); | |
1360 | ||
1361 | /* Get dimensions of truncation and continuation glyphs. These are | |
1362 | displayed as bitmaps under X, so we don't need them for such | |
1363 | frames. */ | |
1364 | if (!FRAME_WINDOW_P (it->f)) | |
1365 | { | |
1366 | if (it->truncate_lines_p) | |
1367 | { | |
1368 | /* We will need the truncation glyph. */ | |
1369 | xassert (it->glyph_row == NULL); | |
1370 | produce_special_glyphs (it, IT_TRUNCATION); | |
1371 | it->truncation_pixel_width = it->pixel_width; | |
1372 | } | |
1373 | else | |
1374 | { | |
1375 | /* We will need the continuation glyph. */ | |
1376 | xassert (it->glyph_row == NULL); | |
1377 | produce_special_glyphs (it, IT_CONTINUATION); | |
1378 | it->continuation_pixel_width = it->pixel_width; | |
1379 | } | |
1380 | ||
1381 | /* Reset these values to zero becaue the produce_special_glyphs | |
1382 | above has changed them. */ | |
1383 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1384 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1385 | } |
1386 | ||
1387 | /* Set this after getting the dimensions of truncation and | |
1388 | continuation glyphs, so that we don't produce glyphs when calling | |
1389 | produce_special_glyphs, above. */ | |
1390 | it->glyph_row = row; | |
1391 | it->area = TEXT_AREA; | |
1392 | ||
1393 | /* Get the dimensions of the display area. The display area | |
1394 | consists of the visible window area plus a horizontally scrolled | |
1395 | part to the left of the window. All x-values are relative to the | |
1396 | start of this total display area. */ | |
1397 | if (base_face_id != DEFAULT_FACE_ID) | |
1398 | { | |
1399 | /* Mode lines, menu bar in terminal frames. */ | |
1400 | it->first_visible_x = 0; | |
1401 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1402 | } | |
1403 | else | |
1404 | { | |
1405 | it->first_visible_x | |
1406 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1407 | it->last_visible_x = (it->first_visible_x | |
1408 | + window_box_width (w, TEXT_AREA)); | |
1409 | ||
1410 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1411 | the right margin. Otherwise, leave room for the continuation | |
1412 | glyph(s). Truncation and continuation glyphs are not inserted | |
1413 | for window-based redisplay. */ | |
1414 | if (!FRAME_WINDOW_P (it->f)) | |
1415 | { | |
1416 | if (it->truncate_lines_p) | |
1417 | it->last_visible_x -= it->truncation_pixel_width; | |
1418 | else | |
1419 | it->last_visible_x -= it->continuation_pixel_width; | |
1420 | } | |
1421 | ||
045dee35 GM |
1422 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1423 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1424 | } |
1425 | ||
1426 | /* Leave room for a border glyph. */ | |
1427 | if (!FRAME_WINDOW_P (it->f) | |
1428 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1429 | it->last_visible_x -= 1; | |
1430 | ||
1431 | it->last_visible_y = window_text_bottom_y (w); | |
1432 | ||
1433 | /* For mode lines and alike, arrange for the first glyph having a | |
1434 | left box line if the face specifies a box. */ | |
1435 | if (base_face_id != DEFAULT_FACE_ID) | |
1436 | { | |
1437 | struct face *face; | |
1438 | ||
1439 | it->face_id = base_face_id; | |
1440 | ||
1441 | /* If we have a boxed mode line, make the first character appear | |
1442 | with a left box line. */ | |
1443 | face = FACE_FROM_ID (it->f, base_face_id); | |
1444 | if (face->box != FACE_NO_BOX) | |
1445 | it->start_of_box_run_p = 1; | |
1446 | } | |
1447 | ||
1448 | /* If a buffer position was specified, set the iterator there, | |
1449 | getting overlays and face properties from that position. */ | |
1450 | if (charpos > 0) | |
1451 | { | |
1452 | it->end_charpos = ZV; | |
1453 | it->face_id = -1; | |
1454 | IT_CHARPOS (*it) = charpos; | |
1455 | ||
1456 | /* Compute byte position if not specified. */ | |
1457 | if (bytepos <= 0) | |
1458 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1459 | else | |
1460 | IT_BYTEPOS (*it) = bytepos; | |
1461 | ||
1462 | /* Compute faces etc. */ | |
1463 | reseat (it, it->current.pos, 1); | |
1464 | } | |
1465 | ||
1466 | CHECK_IT (it); | |
1467 | } | |
1468 | ||
1469 | ||
1470 | /* Initialize IT for the display of window W with window start POS. */ | |
1471 | ||
1472 | void | |
1473 | start_display (it, w, pos) | |
1474 | struct it *it; | |
1475 | struct window *w; | |
1476 | struct text_pos pos; | |
1477 | { | |
1478 | int start_at_line_beg_p; | |
1479 | struct glyph_row *row; | |
045dee35 | 1480 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1481 | int first_y; |
1482 | ||
1483 | row = w->desired_matrix->rows + first_vpos; | |
1484 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1485 | first_y = it->current_y; | |
1486 | ||
1487 | /* If window start is not at a line start, move back to the line | |
1488 | start. This makes sure that we take continuation lines into | |
1489 | account. */ | |
1490 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1491 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1492 | if (!start_at_line_beg_p) | |
1493 | reseat_at_previous_visible_line_start (it); | |
1494 | ||
5f5c8ee5 GM |
1495 | /* If window start is not at a line start, skip forward to POS to |
1496 | get the correct continuation_lines_width and current_x. */ | |
1497 | if (!start_at_line_beg_p) | |
1498 | { | |
1499 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1500 | ||
1501 | /* If lines are continued, this line may end in the middle of a | |
1502 | multi-glyph character (e.g. a control character displayed as | |
1503 | \003, or in the middle of an overlay string). In this case | |
1504 | move_it_to above will not have taken us to the start of | |
1505 | the continuation line but to the end of the continued line. */ | |
b28cb6ed | 1506 | if (!it->truncate_lines_p) |
5f5c8ee5 | 1507 | { |
b28cb6ed | 1508 | if (it->current_x > 0) |
5f5c8ee5 | 1509 | { |
b28cb6ed GM |
1510 | if (it->current.dpvec_index >= 0 |
1511 | || it->current.overlay_string_index >= 0) | |
1512 | { | |
1513 | set_iterator_to_next (it); | |
1514 | move_it_in_display_line_to (it, -1, -1, 0); | |
1515 | } | |
1516 | ||
1517 | it->continuation_lines_width += it->current_x; | |
5f5c8ee5 | 1518 | } |
b28cb6ed GM |
1519 | |
1520 | /* We're starting a new display line, not affected by the | |
1521 | height of the continued line, so clear the appropriate | |
1522 | fields in the iterator structure. */ | |
1523 | it->max_ascent = it->max_descent = 0; | |
1524 | it->max_phys_ascent = it->max_phys_descent = 0; | |
5f5c8ee5 GM |
1525 | } |
1526 | ||
1527 | it->current_y = first_y; | |
1528 | it->vpos = 0; | |
1529 | it->current_x = it->hpos = 0; | |
1530 | } | |
1531 | ||
1532 | #if 0 /* Don't assert the following because start_display is sometimes | |
1533 | called intentionally with a window start that is not at a | |
1534 | line start. Please leave this code in as a comment. */ | |
1535 | ||
1536 | /* Window start should be on a line start, now. */ | |
1537 | xassert (it->continuation_lines_width | |
1538 | || IT_CHARPOS (it) == BEGV | |
1539 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1540 | #endif /* 0 */ | |
1541 | } | |
1542 | ||
1543 | ||
1544 | /* Initialize IT for stepping through current_buffer in window W, | |
1545 | starting at position POS that includes overlay string and display | |
1546 | vector/ control character translation position information. */ | |
1547 | ||
1548 | static void | |
1549 | init_from_display_pos (it, w, pos) | |
1550 | struct it *it; | |
1551 | struct window *w; | |
1552 | struct display_pos *pos; | |
1553 | { | |
1554 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1555 | text, so we might end up at a position different from POS. This | |
1556 | is only a problem when POS is a row start after a newline and an | |
1557 | overlay starts there with an after-string, and the overlay has an | |
1558 | invisible property. Since we don't skip invisible text in | |
1559 | display_line and elsewhere immediately after consuming the | |
1560 | newline before the row start, such a POS will not be in a string, | |
1561 | but the call to init_iterator below will move us to the | |
1562 | after-string. */ | |
1563 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1564 | NULL, DEFAULT_FACE_ID); | |
1565 | ||
1566 | /* If position is within an overlay string, set up IT to | |
1567 | the right overlay string. */ | |
1568 | if (pos->overlay_string_index >= 0) | |
1569 | { | |
1570 | int relative_index; | |
1571 | ||
1572 | /* We already have the first chunk of overlay strings in | |
1573 | IT->overlay_strings. Load more until the one for | |
1574 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1575 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1576 | { | |
1577 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1578 | it->current.overlay_string_index = 0; | |
1579 | while (n--) | |
1580 | { | |
1581 | load_overlay_strings (it); | |
1582 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | it->current.overlay_string_index = pos->overlay_string_index; | |
1587 | relative_index = (it->current.overlay_string_index | |
1588 | % OVERLAY_STRING_CHUNK_SIZE); | |
1589 | it->string = it->overlay_strings[relative_index]; | |
1590 | it->current.string_pos = pos->string_pos; | |
1591 | it->method = next_element_from_string; | |
1592 | } | |
1593 | else if (CHARPOS (pos->string_pos) >= 0) | |
1594 | { | |
1595 | /* Recorded position is not in an overlay string, but in another | |
1596 | string. This can only be a string from a `display' property. | |
1597 | IT should already be filled with that string. */ | |
1598 | it->current.string_pos = pos->string_pos; | |
1599 | xassert (STRINGP (it->string)); | |
1600 | } | |
1601 | ||
1602 | /* Restore position in display vector translations or control | |
1603 | character translations. */ | |
1604 | if (pos->dpvec_index >= 0) | |
1605 | { | |
1606 | /* This fills IT->dpvec. */ | |
1607 | get_next_display_element (it); | |
1608 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1609 | it->current.dpvec_index = pos->dpvec_index; | |
1610 | } | |
1611 | ||
1612 | CHECK_IT (it); | |
1613 | } | |
1614 | ||
1615 | ||
1616 | /* Initialize IT for stepping through current_buffer in window W | |
1617 | starting at ROW->start. */ | |
1618 | ||
1619 | static void | |
1620 | init_to_row_start (it, w, row) | |
1621 | struct it *it; | |
1622 | struct window *w; | |
1623 | struct glyph_row *row; | |
1624 | { | |
1625 | init_from_display_pos (it, w, &row->start); | |
1626 | it->continuation_lines_width = row->continuation_lines_width; | |
1627 | CHECK_IT (it); | |
1628 | } | |
1629 | ||
1630 | ||
1631 | /* Initialize IT for stepping through current_buffer in window W | |
1632 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1633 | ||
1634 | static void | |
1635 | init_to_row_end (it, w, row) | |
1636 | struct it *it; | |
1637 | struct window *w; | |
1638 | struct glyph_row *row; | |
1639 | { | |
1640 | init_from_display_pos (it, w, &row->end); | |
1641 | ||
1642 | if (row->continued_p) | |
1643 | it->continuation_lines_width = (row->continuation_lines_width | |
1644 | + row->pixel_width); | |
1645 | CHECK_IT (it); | |
1646 | } | |
1647 | ||
1648 | ||
1649 | ||
1650 | \f | |
1651 | /*********************************************************************** | |
1652 | Text properties | |
1653 | ***********************************************************************/ | |
1654 | ||
1655 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1656 | overlay changes. Set IT->stop_charpos to the next position where | |
1657 | to stop. */ | |
1658 | ||
1659 | static void | |
1660 | handle_stop (it) | |
1661 | struct it *it; | |
1662 | { | |
1663 | enum prop_handled handled; | |
1664 | int handle_overlay_change_p = 1; | |
1665 | struct props *p; | |
1666 | ||
1667 | it->dpvec = NULL; | |
1668 | it->current.dpvec_index = -1; | |
2970b9be | 1669 | it->add_overlay_start = 0; |
5f5c8ee5 GM |
1670 | |
1671 | do | |
1672 | { | |
1673 | handled = HANDLED_NORMALLY; | |
1674 | ||
1675 | /* Call text property handlers. */ | |
1676 | for (p = it_props; p->handler; ++p) | |
1677 | { | |
1678 | handled = p->handler (it); | |
2970b9be | 1679 | |
5f5c8ee5 GM |
1680 | if (handled == HANDLED_RECOMPUTE_PROPS) |
1681 | break; | |
1682 | else if (handled == HANDLED_RETURN) | |
1683 | return; | |
1684 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1685 | handle_overlay_change_p = 0; | |
1686 | } | |
1687 | ||
1688 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1689 | { | |
1690 | /* Don't check for overlay strings below when set to deliver | |
1691 | characters from a display vector. */ | |
1692 | if (it->method == next_element_from_display_vector) | |
1693 | handle_overlay_change_p = 0; | |
1694 | ||
1695 | /* Handle overlay changes. */ | |
1696 | if (handle_overlay_change_p) | |
1697 | handled = handle_overlay_change (it); | |
1698 | ||
1699 | /* Determine where to stop next. */ | |
1700 | if (handled == HANDLED_NORMALLY) | |
1701 | compute_stop_pos (it); | |
1702 | } | |
1703 | } | |
1704 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1705 | } | |
1706 | ||
1707 | ||
1708 | /* Compute IT->stop_charpos from text property and overlay change | |
1709 | information for IT's current position. */ | |
1710 | ||
1711 | static void | |
1712 | compute_stop_pos (it) | |
1713 | struct it *it; | |
1714 | { | |
1715 | register INTERVAL iv, next_iv; | |
1716 | Lisp_Object object, limit, position; | |
1717 | ||
1718 | /* If nowhere else, stop at the end. */ | |
1719 | it->stop_charpos = it->end_charpos; | |
1720 | ||
1721 | if (STRINGP (it->string)) | |
1722 | { | |
1723 | /* Strings are usually short, so don't limit the search for | |
1724 | properties. */ | |
1725 | object = it->string; | |
1726 | limit = Qnil; | |
1727 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1728 | } | |
1729 | else | |
1730 | { | |
1731 | int charpos; | |
1732 | ||
1733 | /* If next overlay change is in front of the current stop pos | |
1734 | (which is IT->end_charpos), stop there. Note: value of | |
1735 | next_overlay_change is point-max if no overlay change | |
1736 | follows. */ | |
1737 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1738 | if (charpos < it->stop_charpos) | |
1739 | it->stop_charpos = charpos; | |
1740 | ||
1741 | /* If showing the region, we have to stop at the region | |
1742 | start or end because the face might change there. */ | |
1743 | if (it->region_beg_charpos > 0) | |
1744 | { | |
1745 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1746 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1747 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1748 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1749 | } | |
1750 | ||
1751 | /* Set up variables for computing the stop position from text | |
1752 | property changes. */ | |
1753 | XSETBUFFER (object, current_buffer); | |
1754 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1755 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1756 | ||
1757 | } | |
1758 | ||
1759 | /* Get the interval containing IT's position. Value is a null | |
1760 | interval if there isn't such an interval. */ | |
1761 | iv = validate_interval_range (object, &position, &position, 0); | |
1762 | if (!NULL_INTERVAL_P (iv)) | |
1763 | { | |
1764 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1765 | struct props *p; | |
1766 | ||
1767 | /* Get properties here. */ | |
1768 | for (p = it_props; p->handler; ++p) | |
1769 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1770 | ||
1771 | /* Look for an interval following iv that has different | |
1772 | properties. */ | |
1773 | for (next_iv = next_interval (iv); | |
1774 | (!NULL_INTERVAL_P (next_iv) | |
1775 | && (NILP (limit) | |
1776 | || XFASTINT (limit) > next_iv->position)); | |
1777 | next_iv = next_interval (next_iv)) | |
1778 | { | |
1779 | for (p = it_props; p->handler; ++p) | |
1780 | { | |
1781 | Lisp_Object new_value; | |
1782 | ||
1783 | new_value = textget (next_iv->plist, *p->name); | |
1784 | if (!EQ (values_here[p->idx], new_value)) | |
1785 | break; | |
1786 | } | |
1787 | ||
1788 | if (p->handler) | |
1789 | break; | |
1790 | } | |
1791 | ||
1792 | if (!NULL_INTERVAL_P (next_iv)) | |
1793 | { | |
1794 | if (INTEGERP (limit) | |
1795 | && next_iv->position >= XFASTINT (limit)) | |
1796 | /* No text property change up to limit. */ | |
1797 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1798 | else | |
1799 | /* Text properties change in next_iv. */ | |
1800 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | xassert (STRINGP (it->string) | |
1805 | || (it->stop_charpos >= BEGV | |
1806 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1807 | } | |
1808 | ||
1809 | ||
1810 | /* Return the position of the next overlay change after POS in | |
1811 | current_buffer. Value is point-max if no overlay change | |
1812 | follows. This is like `next-overlay-change' but doesn't use | |
1813 | xmalloc. */ | |
1814 | ||
1815 | static int | |
1816 | next_overlay_change (pos) | |
1817 | int pos; | |
1818 | { | |
1819 | int noverlays; | |
1820 | int endpos; | |
1821 | Lisp_Object *overlays; | |
1822 | int len; | |
1823 | int i; | |
1824 | ||
1825 | /* Get all overlays at the given position. */ | |
1826 | len = 10; | |
1827 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 1828 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
1829 | if (noverlays > len) |
1830 | { | |
1831 | len = noverlays; | |
1832 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
a0315a63 | 1833 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL, 1); |
5f5c8ee5 GM |
1834 | } |
1835 | ||
1836 | /* If any of these overlays ends before endpos, | |
1837 | use its ending point instead. */ | |
1838 | for (i = 0; i < noverlays; ++i) | |
1839 | { | |
1840 | Lisp_Object oend; | |
1841 | int oendpos; | |
1842 | ||
1843 | oend = OVERLAY_END (overlays[i]); | |
1844 | oendpos = OVERLAY_POSITION (oend); | |
1845 | endpos = min (endpos, oendpos); | |
1846 | } | |
1847 | ||
1848 | return endpos; | |
1849 | } | |
1850 | ||
1851 | ||
1852 | \f | |
1853 | /*********************************************************************** | |
1854 | Fontification | |
1855 | ***********************************************************************/ | |
1856 | ||
1857 | /* Handle changes in the `fontified' property of the current buffer by | |
1858 | calling hook functions from Qfontification_functions to fontify | |
1859 | regions of text. */ | |
1860 | ||
1861 | static enum prop_handled | |
1862 | handle_fontified_prop (it) | |
1863 | struct it *it; | |
1864 | { | |
1865 | Lisp_Object prop, pos; | |
1866 | enum prop_handled handled = HANDLED_NORMALLY; | |
1867 | ||
1868 | /* Get the value of the `fontified' property at IT's current buffer | |
1869 | position. (The `fontified' property doesn't have a special | |
1870 | meaning in strings.) If the value is nil, call functions from | |
1871 | Qfontification_functions. */ | |
1872 | if (!STRINGP (it->string) | |
1873 | && it->s == NULL | |
1874 | && !NILP (Vfontification_functions) | |
085536c2 | 1875 | && !NILP (Vrun_hooks) |
5f5c8ee5 GM |
1876 | && (pos = make_number (IT_CHARPOS (*it)), |
1877 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1878 | NILP (prop))) | |
1879 | { | |
085536c2 GM |
1880 | int count = specpdl_ptr - specpdl; |
1881 | Lisp_Object val; | |
1882 | ||
1883 | val = Vfontification_functions; | |
1884 | specbind (Qfontification_functions, Qnil); | |
1885 | specbind (Qafter_change_functions, Qnil); | |
1886 | ||
1887 | if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
1888 | call1 (val, pos); | |
1889 | else | |
1890 | { | |
1891 | Lisp_Object globals, fn; | |
1892 | struct gcpro gcpro1, gcpro2; | |
5f5c8ee5 | 1893 | |
085536c2 GM |
1894 | globals = Qnil; |
1895 | GCPRO2 (val, globals); | |
1896 | ||
1897 | for (; CONSP (val); val = XCDR (val)) | |
1898 | { | |
1899 | fn = XCAR (val); | |
1900 | ||
1901 | if (EQ (fn, Qt)) | |
1902 | { | |
1903 | /* A value of t indicates this hook has a local | |
1904 | binding; it means to run the global binding too. | |
1905 | In a global value, t should not occur. If it | |
1906 | does, we must ignore it to avoid an endless | |
1907 | loop. */ | |
1908 | for (globals = Fdefault_value (Qfontification_functions); | |
1909 | CONSP (globals); | |
1910 | globals = XCDR (globals)) | |
1911 | { | |
1912 | fn = XCAR (globals); | |
1913 | if (!EQ (fn, Qt)) | |
1914 | call1 (fn, pos); | |
1915 | } | |
1916 | } | |
1917 | else | |
1918 | call1 (fn, pos); | |
1919 | } | |
1920 | ||
1921 | UNGCPRO; | |
1922 | } | |
1923 | ||
1924 | unbind_to (count, Qnil); | |
5f5c8ee5 GM |
1925 | |
1926 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1927 | something. This avoids an endless loop if they failed to | |
1928 | fontify the text for which reason ever. */ | |
1929 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1930 | handled = HANDLED_RECOMPUTE_PROPS; | |
1931 | } | |
1932 | ||
1933 | return handled; | |
1934 | } | |
1935 | ||
1936 | ||
1937 | \f | |
1938 | /*********************************************************************** | |
1939 | Faces | |
1940 | ***********************************************************************/ | |
1941 | ||
1942 | /* Set up iterator IT from face properties at its current position. | |
1943 | Called from handle_stop. */ | |
1944 | ||
1945 | static enum prop_handled | |
1946 | handle_face_prop (it) | |
1947 | struct it *it; | |
1948 | { | |
1949 | int new_face_id, next_stop; | |
1950 | ||
1951 | if (!STRINGP (it->string)) | |
1952 | { | |
1953 | new_face_id | |
1954 | = face_at_buffer_position (it->w, | |
1955 | IT_CHARPOS (*it), | |
1956 | it->region_beg_charpos, | |
1957 | it->region_end_charpos, | |
1958 | &next_stop, | |
1959 | (IT_CHARPOS (*it) | |
1960 | + TEXT_PROP_DISTANCE_LIMIT), | |
1961 | 0); | |
1962 | ||
1963 | /* Is this a start of a run of characters with box face? | |
1964 | Caveat: this can be called for a freshly initialized | |
1965 | iterator; face_id is -1 is this case. We know that the new | |
1966 | face will not change until limit, i.e. if the new face has a | |
1967 | box, all characters up to limit will have one. But, as | |
1968 | usual, we don't know whether limit is really the end. */ | |
1969 | if (new_face_id != it->face_id) | |
1970 | { | |
1971 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1972 | ||
1973 | /* If new face has a box but old face has not, this is | |
1974 | the start of a run of characters with box, i.e. it has | |
1975 | a shadow on the left side. The value of face_id of the | |
1976 | iterator will be -1 if this is the initial call that gets | |
1977 | the face. In this case, we have to look in front of IT's | |
1978 | position and see whether there is a face != new_face_id. */ | |
1979 | it->start_of_box_run_p | |
1980 | = (new_face->box != FACE_NO_BOX | |
1981 | && (it->face_id >= 0 | |
1982 | || IT_CHARPOS (*it) == BEG | |
1983 | || new_face_id != face_before_it_pos (it))); | |
1984 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1985 | } | |
1986 | } | |
1987 | else | |
1988 | { | |
1989 | new_face_id | |
1990 | = face_at_string_position (it->w, | |
1991 | it->string, | |
1992 | IT_STRING_CHARPOS (*it), | |
1993 | (it->current.overlay_string_index >= 0 | |
1994 | ? IT_CHARPOS (*it) | |
1995 | : 0), | |
1996 | it->region_beg_charpos, | |
1997 | it->region_end_charpos, | |
1998 | &next_stop, | |
1999 | it->base_face_id); | |
2000 | ||
2001 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
2002 | /* If IT is used to display a mode line we would really like to | |
2003 | use the mode line face instead of the frame's default face. */ | |
2004 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
2005 | && new_face_id == DEFAULT_FACE_ID) | |
2006 | new_face_id = MODE_LINE_FACE_ID; | |
2007 | #endif | |
2008 | ||
2009 | /* Is this a start of a run of characters with box? Caveat: | |
2010 | this can be called for a freshly allocated iterator; face_id | |
2011 | is -1 is this case. We know that the new face will not | |
2012 | change until the next check pos, i.e. if the new face has a | |
2013 | box, all characters up to that position will have a | |
2014 | box. But, as usual, we don't know whether that position | |
2015 | is really the end. */ | |
2016 | if (new_face_id != it->face_id) | |
2017 | { | |
2018 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
2019 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
2020 | ||
2021 | /* If new face has a box but old face hasn't, this is the | |
2022 | start of a run of characters with box, i.e. it has a | |
2023 | shadow on the left side. */ | |
2024 | it->start_of_box_run_p | |
2025 | = new_face->box && (old_face == NULL || !old_face->box); | |
2026 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
2027 | } | |
2028 | } | |
2029 | ||
2030 | it->face_id = new_face_id; | |
5f5c8ee5 GM |
2031 | return HANDLED_NORMALLY; |
2032 | } | |
2033 | ||
2034 | ||
2035 | /* Compute the face one character before or after the current position | |
2036 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
2037 | position. Value is the id of the face. */ | |
2038 | ||
2039 | static int | |
2040 | face_before_or_after_it_pos (it, before_p) | |
2041 | struct it *it; | |
2042 | int before_p; | |
2043 | { | |
2044 | int face_id, limit; | |
2045 | int next_check_charpos; | |
2046 | struct text_pos pos; | |
2047 | ||
2048 | xassert (it->s == NULL); | |
2049 | ||
2050 | if (STRINGP (it->string)) | |
2051 | { | |
2052 | /* No face change past the end of the string (for the case | |
2053 | we are padding with spaces). No face change before the | |
2054 | string start. */ | |
2055 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
2056 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
2057 | return it->face_id; | |
2058 | ||
2059 | /* Set pos to the position before or after IT's current position. */ | |
2060 | if (before_p) | |
2061 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
2062 | else | |
260a86a0 KH |
2063 | /* For composition, we must check the character after the |
2064 | composition. */ | |
2065 | pos = (it->what == IT_COMPOSITION | |
2066 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
2067 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 GM |
2068 | |
2069 | /* Get the face for ASCII, or unibyte. */ | |
2070 | face_id | |
2071 | = face_at_string_position (it->w, | |
2072 | it->string, | |
2073 | CHARPOS (pos), | |
2074 | (it->current.overlay_string_index >= 0 | |
2075 | ? IT_CHARPOS (*it) | |
2076 | : 0), | |
2077 | it->region_beg_charpos, | |
2078 | it->region_end_charpos, | |
2079 | &next_check_charpos, | |
2080 | it->base_face_id); | |
2081 | ||
2082 | /* Correct the face for charsets different from ASCII. Do it | |
2083 | for the multibyte case only. The face returned above is | |
2084 | suitable for unibyte text if IT->string is unibyte. */ | |
2085 | if (STRING_MULTIBYTE (it->string)) | |
2086 | { | |
2087 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
2088 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
980806b6 KH |
2089 | int c, len; |
2090 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
5f5c8ee5 | 2091 | |
4fdb80f2 | 2092 | c = string_char_and_length (p, rest, &len); |
980806b6 | 2093 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
2094 | } |
2095 | } | |
2096 | else | |
2097 | { | |
70851746 GM |
2098 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
2099 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
2100 | return it->face_id; | |
2101 | ||
5f5c8ee5 GM |
2102 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
2103 | pos = it->current.pos; | |
2104 | ||
2105 | if (before_p) | |
c1005d06 | 2106 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 2107 | else |
260a86a0 KH |
2108 | { |
2109 | if (it->what == IT_COMPOSITION) | |
2110 | /* For composition, we must check the position after the | |
2111 | composition. */ | |
2112 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2113 | else | |
c1005d06 | 2114 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 2115 | } |
5f5c8ee5 GM |
2116 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2117 | face_id = face_at_buffer_position (it->w, | |
2118 | CHARPOS (pos), | |
2119 | it->region_beg_charpos, | |
2120 | it->region_end_charpos, | |
2121 | &next_check_charpos, | |
2122 | limit, 0); | |
2123 | ||
2124 | /* Correct the face for charsets different from ASCII. Do it | |
2125 | for the multibyte case only. The face returned above is | |
2126 | suitable for unibyte text if current_buffer is unibyte. */ | |
2127 | if (it->multibyte_p) | |
2128 | { | |
980806b6 KH |
2129 | int c = FETCH_MULTIBYTE_CHAR (CHARPOS (pos)); |
2130 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
2131 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
2132 | } |
2133 | } | |
2134 | ||
2135 | return face_id; | |
2136 | } | |
2137 | ||
2138 | ||
2139 | \f | |
2140 | /*********************************************************************** | |
2141 | Invisible text | |
2142 | ***********************************************************************/ | |
2143 | ||
2144 | /* Set up iterator IT from invisible properties at its current | |
2145 | position. Called from handle_stop. */ | |
2146 | ||
2147 | static enum prop_handled | |
2148 | handle_invisible_prop (it) | |
2149 | struct it *it; | |
2150 | { | |
2151 | enum prop_handled handled = HANDLED_NORMALLY; | |
2152 | ||
2153 | if (STRINGP (it->string)) | |
2154 | { | |
2155 | extern Lisp_Object Qinvisible; | |
2156 | Lisp_Object prop, end_charpos, limit, charpos; | |
2157 | ||
2158 | /* Get the value of the invisible text property at the | |
2159 | current position. Value will be nil if there is no such | |
2160 | property. */ | |
2161 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2162 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2163 | ||
eadc0bf8 GM |
2164 | if (!NILP (prop) |
2165 | && IT_STRING_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2166 | { |
2167 | handled = HANDLED_RECOMPUTE_PROPS; | |
2168 | ||
2169 | /* Get the position at which the next change of the | |
2170 | invisible text property can be found in IT->string. | |
2171 | Value will be nil if the property value is the same for | |
2172 | all the rest of IT->string. */ | |
2173 | XSETINT (limit, XSTRING (it->string)->size); | |
2174 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2175 | it->string, limit); | |
2176 | ||
2177 | /* Text at current position is invisible. The next | |
2178 | change in the property is at position end_charpos. | |
2179 | Move IT's current position to that position. */ | |
2180 | if (INTEGERP (end_charpos) | |
2181 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2182 | { | |
2183 | struct text_pos old; | |
2184 | old = it->current.string_pos; | |
2185 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2186 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2187 | } | |
2188 | else | |
2189 | { | |
2190 | /* The rest of the string is invisible. If this is an | |
2191 | overlay string, proceed with the next overlay string | |
2192 | or whatever comes and return a character from there. */ | |
2193 | if (it->current.overlay_string_index >= 0) | |
2194 | { | |
2195 | next_overlay_string (it); | |
2196 | /* Don't check for overlay strings when we just | |
2197 | finished processing them. */ | |
2198 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2199 | } | |
2200 | else | |
2201 | { | |
2202 | struct Lisp_String *s = XSTRING (it->string); | |
2203 | IT_STRING_CHARPOS (*it) = s->size; | |
2204 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2205 | } | |
2206 | } | |
2207 | } | |
2208 | } | |
2209 | else | |
2210 | { | |
2211 | int visible_p, newpos, next_stop; | |
2212 | Lisp_Object pos, prop; | |
2213 | ||
2214 | /* First of all, is there invisible text at this position? */ | |
2215 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2216 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2217 | ||
2218 | /* If we are on invisible text, skip over it. */ | |
eadc0bf8 GM |
2219 | if (TEXT_PROP_MEANS_INVISIBLE (prop) |
2220 | && IT_CHARPOS (*it) < it->end_charpos) | |
5f5c8ee5 GM |
2221 | { |
2222 | /* Record whether we have to display an ellipsis for the | |
2223 | invisible text. */ | |
2224 | int display_ellipsis_p | |
2225 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2226 | ||
2227 | handled = HANDLED_RECOMPUTE_PROPS; | |
2970b9be | 2228 | it->add_overlay_start = IT_CHARPOS (*it); |
5f5c8ee5 GM |
2229 | |
2230 | /* Loop skipping over invisible text. The loop is left at | |
2231 | ZV or with IT on the first char being visible again. */ | |
2232 | do | |
2233 | { | |
2234 | /* Try to skip some invisible text. Return value is the | |
2235 | position reached which can be equal to IT's position | |
2236 | if there is nothing invisible here. This skips both | |
2237 | over invisible text properties and overlays with | |
2238 | invisible property. */ | |
2239 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2240 | &next_stop, ZV, it->window); | |
2241 | ||
2242 | /* If we skipped nothing at all we weren't at invisible | |
2243 | text in the first place. If everything to the end of | |
2244 | the buffer was skipped, end the loop. */ | |
2245 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2246 | visible_p = 1; | |
2247 | else | |
2248 | { | |
2249 | /* We skipped some characters but not necessarily | |
2250 | all there are. Check if we ended up on visible | |
2251 | text. Fget_char_property returns the property of | |
2252 | the char before the given position, i.e. if we | |
2253 | get visible_p = 1, this means that the char at | |
2254 | newpos is visible. */ | |
2255 | XSETFASTINT (pos, newpos); | |
2256 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2257 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2258 | } | |
2259 | ||
2260 | /* If we ended up on invisible text, proceed to | |
2261 | skip starting with next_stop. */ | |
2262 | if (!visible_p) | |
2263 | IT_CHARPOS (*it) = next_stop; | |
2264 | } | |
2265 | while (!visible_p); | |
2266 | ||
2267 | /* The position newpos is now either ZV or on visible text. */ | |
2268 | IT_CHARPOS (*it) = newpos; | |
2269 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2270 | ||
2271 | /* Maybe return `...' next for the end of the invisible text. */ | |
2272 | if (display_ellipsis_p) | |
2273 | { | |
2274 | if (it->dp | |
2275 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2276 | { | |
2277 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2278 | it->dpvec = v->contents; | |
2279 | it->dpend = v->contents + v->size; | |
2280 | } | |
2281 | else | |
2282 | { | |
2283 | /* Default `...'. */ | |
2284 | it->dpvec = default_invis_vector; | |
2285 | it->dpend = default_invis_vector + 3; | |
2286 | } | |
2287 | ||
2288 | /* The ellipsis display does not replace the display of | |
2289 | the character at the new position. Indicate this by | |
2290 | setting IT->dpvec_char_len to zero. */ | |
2291 | it->dpvec_char_len = 0; | |
2292 | ||
2293 | it->current.dpvec_index = 0; | |
2294 | it->method = next_element_from_display_vector; | |
2295 | } | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | return handled; | |
2300 | } | |
2301 | ||
2302 | ||
2303 | \f | |
2304 | /*********************************************************************** | |
2305 | 'display' property | |
2306 | ***********************************************************************/ | |
2307 | ||
2308 | /* Set up iterator IT from `display' property at its current position. | |
2309 | Called from handle_stop. */ | |
2310 | ||
2311 | static enum prop_handled | |
2312 | handle_display_prop (it) | |
2313 | struct it *it; | |
2314 | { | |
2315 | Lisp_Object prop, object; | |
2316 | struct text_pos *position; | |
2317 | int space_or_image_found_p; | |
2318 | ||
2319 | if (STRINGP (it->string)) | |
2320 | { | |
2321 | object = it->string; | |
2322 | position = &it->current.string_pos; | |
2323 | } | |
2324 | else | |
2325 | { | |
2326 | object = Qnil; | |
2327 | position = &it->current.pos; | |
2328 | } | |
2329 | ||
2330 | /* Reset those iterator values set from display property values. */ | |
2331 | it->font_height = Qnil; | |
2332 | it->space_width = Qnil; | |
2333 | it->voffset = 0; | |
2334 | ||
2335 | /* We don't support recursive `display' properties, i.e. string | |
2336 | values that have a string `display' property, that have a string | |
2337 | `display' property etc. */ | |
2338 | if (!it->string_from_display_prop_p) | |
2339 | it->area = TEXT_AREA; | |
2340 | ||
2341 | prop = Fget_char_property (make_number (position->charpos), | |
2342 | Qdisplay, object); | |
2343 | if (NILP (prop)) | |
2344 | return HANDLED_NORMALLY; | |
2345 | ||
2346 | space_or_image_found_p = 0; | |
f3751a65 GM |
2347 | if (CONSP (prop) |
2348 | && CONSP (XCAR (prop)) | |
2349 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
5f5c8ee5 | 2350 | { |
f3751a65 | 2351 | /* A list of sub-properties. */ |
5f5c8ee5 GM |
2352 | while (CONSP (prop)) |
2353 | { | |
2354 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2355 | space_or_image_found_p = 1; | |
2356 | prop = XCDR (prop); | |
2357 | } | |
2358 | } | |
2359 | else if (VECTORP (prop)) | |
2360 | { | |
2361 | int i; | |
2362 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2363 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2364 | object, position)) | |
2365 | space_or_image_found_p = 1; | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | if (handle_single_display_prop (it, prop, object, position)) | |
2370 | space_or_image_found_p = 1; | |
2371 | } | |
2372 | ||
2373 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2374 | } | |
2375 | ||
2376 | ||
6c577098 | 2377 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2378 | at START_POS in OBJECT. */ |
2379 | ||
2380 | static struct text_pos | |
2381 | display_prop_end (it, object, start_pos) | |
2382 | struct it *it; | |
2383 | Lisp_Object object; | |
2384 | struct text_pos start_pos; | |
2385 | { | |
2386 | Lisp_Object end; | |
2387 | struct text_pos end_pos; | |
5f5c8ee5 | 2388 | |
016b5642 MB |
2389 | end = Fnext_single_char_property_change (make_number (CHARPOS (start_pos)), |
2390 | Qdisplay, object, Qnil); | |
6c577098 GM |
2391 | CHARPOS (end_pos) = XFASTINT (end); |
2392 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2393 | compute_string_pos (&end_pos, start_pos, it->string); |
2394 | else | |
6c577098 | 2395 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2396 | |
2397 | return end_pos; | |
2398 | } | |
2399 | ||
2400 | ||
2401 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2402 | is the object in which the `display' property was found. *POSITION | |
2403 | is the position at which it was found. | |
2404 | ||
2405 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2406 | end position of the `display' property. | |
2407 | ||
2408 | Value is non-zero if a `space' or `image' property value was found. */ | |
2409 | ||
2410 | static int | |
2411 | handle_single_display_prop (it, prop, object, position) | |
2412 | struct it *it; | |
2413 | Lisp_Object prop; | |
2414 | Lisp_Object object; | |
2415 | struct text_pos *position; | |
2416 | { | |
2417 | Lisp_Object value; | |
2418 | int space_or_image_found_p = 0; | |
5f5c8ee5 GM |
2419 | Lisp_Object form; |
2420 | ||
d3acf96b | 2421 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
5a4c88c4 | 2422 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2423 | form = Qt; |
d3acf96b | 2424 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2425 | { |
2426 | prop = XCDR (prop); | |
2427 | if (!CONSP (prop)) | |
2428 | return 0; | |
2429 | form = XCAR (prop); | |
2430 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2431 | } |
2432 | ||
2433 | if (!NILP (form) && !EQ (form, Qt)) | |
2434 | { | |
2435 | struct gcpro gcpro1; | |
2436 | struct text_pos end_pos, pt; | |
2437 | ||
5f5c8ee5 | 2438 | GCPRO1 (form); |
c7aca1ad | 2439 | end_pos = display_prop_end (it, object, *position); |
5f5c8ee5 GM |
2440 | |
2441 | /* Temporarily set point to the end position, and then evaluate | |
2442 | the form. This makes `(eolp)' work as FORM. */ | |
c7aca1ad GM |
2443 | if (BUFFERP (object)) |
2444 | { | |
2445 | CHARPOS (pt) = PT; | |
2446 | BYTEPOS (pt) = PT_BYTE; | |
2447 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2448 | } | |
2449 | ||
5f5c8ee5 | 2450 | form = eval_form (form); |
c7aca1ad GM |
2451 | |
2452 | if (BUFFERP (object)) | |
2453 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
5f5c8ee5 GM |
2454 | UNGCPRO; |
2455 | } | |
2456 | ||
2457 | if (NILP (form)) | |
2458 | return 0; | |
2459 | ||
2460 | if (CONSP (prop) | |
2461 | && EQ (XCAR (prop), Qheight) | |
2462 | && CONSP (XCDR (prop))) | |
2463 | { | |
2464 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2465 | return 0; | |
2466 | ||
2467 | /* `(height HEIGHT)'. */ | |
2468 | it->font_height = XCAR (XCDR (prop)); | |
2469 | if (!NILP (it->font_height)) | |
2470 | { | |
2471 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2472 | int new_height = -1; | |
2473 | ||
2474 | if (CONSP (it->font_height) | |
2475 | && (EQ (XCAR (it->font_height), Qplus) | |
2476 | || EQ (XCAR (it->font_height), Qminus)) | |
2477 | && CONSP (XCDR (it->font_height)) | |
2478 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2479 | { | |
2480 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2481 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2482 | if (EQ (XCAR (it->font_height), Qplus)) | |
2483 | steps = - steps; | |
2484 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2485 | } | |
0d8b31c0 | 2486 | else if (FUNCTIONP (it->font_height)) |
5f5c8ee5 GM |
2487 | { |
2488 | /* Call function with current height as argument. | |
2489 | Value is the new height. */ | |
0d8b31c0 GM |
2490 | Lisp_Object args[2], height; |
2491 | ||
2492 | args[0] = it->font_height; | |
2493 | args[1] = face->lface[LFACE_HEIGHT_INDEX]; | |
2494 | height = call_function (2, args); | |
5f5c8ee5 | 2495 | |
5f5c8ee5 GM |
2496 | if (NUMBERP (height)) |
2497 | new_height = XFLOATINT (height); | |
5f5c8ee5 GM |
2498 | } |
2499 | else if (NUMBERP (it->font_height)) | |
2500 | { | |
2501 | /* Value is a multiple of the canonical char height. */ | |
2502 | struct face *face; | |
2503 | ||
2504 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2505 | new_height = (XFLOATINT (it->font_height) | |
2506 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2507 | } | |
2508 | else | |
2509 | { | |
2510 | /* Evaluate IT->font_height with `height' bound to the | |
2511 | current specified height to get the new height. */ | |
2512 | Lisp_Object value; | |
2513 | int count = specpdl_ptr - specpdl; | |
2514 | ||
2515 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2516 | value = eval_form (it->font_height); | |
2517 | unbind_to (count, Qnil); | |
2518 | ||
2519 | if (NUMBERP (value)) | |
2520 | new_height = XFLOATINT (value); | |
2521 | } | |
2522 | ||
2523 | if (new_height > 0) | |
2524 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2525 | } | |
2526 | } | |
2527 | else if (CONSP (prop) | |
2528 | && EQ (XCAR (prop), Qspace_width) | |
2529 | && CONSP (XCDR (prop))) | |
2530 | { | |
2531 | /* `(space_width WIDTH)'. */ | |
2532 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2533 | return 0; | |
2534 | ||
2535 | value = XCAR (XCDR (prop)); | |
2536 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2537 | it->space_width = value; | |
2538 | } | |
2539 | else if (CONSP (prop) | |
2540 | && EQ (XCAR (prop), Qraise) | |
2541 | && CONSP (XCDR (prop))) | |
2542 | { | |
5f5c8ee5 GM |
2543 | /* `(raise FACTOR)'. */ |
2544 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2545 | return 0; | |
2546 | ||
fb3842a8 | 2547 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
2548 | value = XCAR (XCDR (prop)); |
2549 | if (NUMBERP (value)) | |
2550 | { | |
2551 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2552 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 2553 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
2554 | } |
2555 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2556 | } | |
2557 | else if (!it->string_from_display_prop_p) | |
2558 | { | |
f3751a65 GM |
2559 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
2560 | VALUE) or `((margin nil) VALUE)' or VALUE. */ | |
5f5c8ee5 GM |
2561 | Lisp_Object location, value; |
2562 | struct text_pos start_pos; | |
2563 | int valid_p; | |
2564 | ||
2565 | /* Characters having this form of property are not displayed, so | |
2566 | we have to find the end of the property. */ | |
5f5c8ee5 GM |
2567 | start_pos = *position; |
2568 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 2569 | value = Qnil; |
5f5c8ee5 GM |
2570 | |
2571 | /* Let's stop at the new position and assume that all | |
2572 | text properties change there. */ | |
2573 | it->stop_charpos = position->charpos; | |
2574 | ||
f3751a65 GM |
2575 | location = Qunbound; |
2576 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 2577 | { |
f3751a65 GM |
2578 | Lisp_Object tem; |
2579 | ||
5f5c8ee5 | 2580 | value = XCDR (prop); |
f3751a65 GM |
2581 | if (CONSP (value)) |
2582 | value = XCAR (value); | |
2583 | ||
2584 | tem = XCAR (prop); | |
2585 | if (EQ (XCAR (tem), Qmargin) | |
2586 | && (tem = XCDR (tem), | |
2587 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
2588 | (NILP (tem) | |
2589 | || EQ (tem, Qleft_margin) | |
2590 | || EQ (tem, Qright_margin)))) | |
2591 | location = tem; | |
5f5c8ee5 | 2592 | } |
f3751a65 GM |
2593 | |
2594 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
2595 | { |
2596 | location = Qnil; | |
2597 | value = prop; | |
2598 | } | |
2599 | ||
2600 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 2601 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
2602 | valid_p = STRINGP (value); |
2603 | else | |
2604 | valid_p = (STRINGP (value) | |
2605 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2606 | || valid_image_p (value)); | |
2607 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2608 | valid_p = STRINGP (value); | |
2609 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2610 | ||
2611 | if ((EQ (location, Qleft_margin) | |
2612 | || EQ (location, Qright_margin) | |
2613 | || NILP (location)) | |
2614 | && valid_p) | |
2615 | { | |
a21a3943 GM |
2616 | space_or_image_found_p = 1; |
2617 | ||
5f5c8ee5 GM |
2618 | /* Save current settings of IT so that we can restore them |
2619 | when we are finished with the glyph property value. */ | |
2620 | push_it (it); | |
2621 | ||
2622 | if (NILP (location)) | |
2623 | it->area = TEXT_AREA; | |
2624 | else if (EQ (location, Qleft_margin)) | |
2625 | it->area = LEFT_MARGIN_AREA; | |
2626 | else | |
2627 | it->area = RIGHT_MARGIN_AREA; | |
2628 | ||
2629 | if (STRINGP (value)) | |
2630 | { | |
2631 | it->string = value; | |
2632 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2633 | it->current.overlay_string_index = -1; | |
2634 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2635 | it->end_charpos = it->string_nchars | |
2636 | = XSTRING (it->string)->size; | |
2637 | it->method = next_element_from_string; | |
2638 | it->stop_charpos = 0; | |
2639 | it->string_from_display_prop_p = 1; | |
2640 | } | |
2641 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2642 | { | |
2643 | it->method = next_element_from_stretch; | |
2644 | it->object = value; | |
2645 | it->current.pos = it->position = start_pos; | |
2646 | } | |
2647 | #ifdef HAVE_WINDOW_SYSTEM | |
2648 | else | |
2649 | { | |
2650 | it->what = IT_IMAGE; | |
2651 | it->image_id = lookup_image (it->f, value); | |
2652 | it->position = start_pos; | |
2653 | it->object = NILP (object) ? it->w->buffer : object; | |
2654 | it->method = next_element_from_image; | |
2655 | ||
02513cdd | 2656 | /* Say that we haven't consumed the characters with |
5f5c8ee5 GM |
2657 | `display' property yet. The call to pop_it in |
2658 | set_iterator_to_next will clean this up. */ | |
2659 | *position = start_pos; | |
2660 | } | |
2661 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2662 | } | |
a21a3943 GM |
2663 | else |
2664 | /* Invalid property or property not supported. Restore | |
2665 | the position to what it was before. */ | |
2666 | *position = start_pos; | |
5f5c8ee5 GM |
2667 | } |
2668 | ||
2669 | return space_or_image_found_p; | |
2670 | } | |
2671 | ||
2672 | ||
06568bbf GM |
2673 | /* Check if PROP is a display sub-property value whose text should be |
2674 | treated as intangible. */ | |
2675 | ||
2676 | static int | |
2677 | single_display_prop_intangible_p (prop) | |
2678 | Lisp_Object prop; | |
2679 | { | |
2680 | /* Skip over `when FORM'. */ | |
2681 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) | |
2682 | { | |
2683 | prop = XCDR (prop); | |
2684 | if (!CONSP (prop)) | |
2685 | return 0; | |
2686 | prop = XCDR (prop); | |
2687 | } | |
2688 | ||
2689 | if (!CONSP (prop)) | |
2690 | return 0; | |
2691 | ||
2692 | /* Skip over `margin LOCATION'. If LOCATION is in the margins, | |
2693 | we don't need to treat text as intangible. */ | |
2694 | if (EQ (XCAR (prop), Qmargin)) | |
2695 | { | |
2696 | prop = XCDR (prop); | |
2697 | if (!CONSP (prop)) | |
2698 | return 0; | |
2699 | ||
2700 | prop = XCDR (prop); | |
2701 | if (!CONSP (prop) | |
2702 | || EQ (XCAR (prop), Qleft_margin) | |
2703 | || EQ (XCAR (prop), Qright_margin)) | |
2704 | return 0; | |
2705 | } | |
2706 | ||
2707 | return CONSP (prop) && EQ (XCAR (prop), Qimage); | |
2708 | } | |
2709 | ||
2710 | ||
2711 | /* Check if PROP is a display property value whose text should be | |
2712 | treated as intangible. */ | |
2713 | ||
2714 | int | |
2715 | display_prop_intangible_p (prop) | |
2716 | Lisp_Object prop; | |
2717 | { | |
2718 | if (CONSP (prop) | |
2719 | && CONSP (XCAR (prop)) | |
2720 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
2721 | { | |
2722 | /* A list of sub-properties. */ | |
2723 | while (CONSP (prop)) | |
2724 | { | |
2725 | if (single_display_prop_intangible_p (XCAR (prop))) | |
2726 | return 1; | |
2727 | prop = XCDR (prop); | |
2728 | } | |
2729 | } | |
2730 | else if (VECTORP (prop)) | |
2731 | { | |
2732 | /* A vector of sub-properties. */ | |
2733 | int i; | |
2734 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2735 | if (single_display_prop_intangible_p (XVECTOR (prop)->contents[i])) | |
2736 | return 1; | |
2737 | } | |
2738 | else | |
2739 | return single_display_prop_intangible_p (prop); | |
2740 | ||
2741 | return 0; | |
2742 | } | |
2743 | ||
5f5c8ee5 | 2744 | \f |
260a86a0 KH |
2745 | /*********************************************************************** |
2746 | `composition' property | |
2747 | ***********************************************************************/ | |
2748 | ||
2749 | /* Set up iterator IT from `composition' property at its current | |
2750 | position. Called from handle_stop. */ | |
2751 | ||
2752 | static enum prop_handled | |
2753 | handle_composition_prop (it) | |
2754 | struct it *it; | |
2755 | { | |
2756 | Lisp_Object prop, string; | |
2757 | int pos, pos_byte, end; | |
2758 | enum prop_handled handled = HANDLED_NORMALLY; | |
2759 | ||
2760 | if (STRINGP (it->string)) | |
2761 | { | |
2762 | pos = IT_STRING_CHARPOS (*it); | |
2763 | pos_byte = IT_STRING_BYTEPOS (*it); | |
2764 | string = it->string; | |
2765 | } | |
2766 | else | |
2767 | { | |
2768 | pos = IT_CHARPOS (*it); | |
2769 | pos_byte = IT_BYTEPOS (*it); | |
2770 | string = Qnil; | |
2771 | } | |
2772 | ||
2773 | /* If there's a valid composition and point is not inside of the | |
2774 | composition (in the case that the composition is from the current | |
2775 | buffer), draw a glyph composed from the composition components. */ | |
2776 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
2777 | && COMPOSITION_VALID_P (pos, end, prop) | |
2778 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
2779 | { | |
2780 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
2781 | ||
2782 | if (id >= 0) | |
2783 | { | |
2784 | it->method = next_element_from_composition; | |
2785 | it->cmp_id = id; | |
2786 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
2787 | /* For a terminal, draw only the first character of the | |
2788 | components. */ | |
2789 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
2790 | it->len = (STRINGP (it->string) | |
2791 | ? string_char_to_byte (it->string, end) | |
2792 | : CHAR_TO_BYTE (end)) - pos_byte; | |
2793 | it->stop_charpos = end; | |
2794 | handled = HANDLED_RETURN; | |
2795 | } | |
2796 | } | |
2797 | ||
2798 | return handled; | |
2799 | } | |
2800 | ||
2801 | ||
2802 | \f | |
5f5c8ee5 GM |
2803 | /*********************************************************************** |
2804 | Overlay strings | |
2805 | ***********************************************************************/ | |
2806 | ||
2807 | /* The following structure is used to record overlay strings for | |
2808 | later sorting in load_overlay_strings. */ | |
2809 | ||
2810 | struct overlay_entry | |
2811 | { | |
2970b9be | 2812 | Lisp_Object overlay; |
5f5c8ee5 GM |
2813 | Lisp_Object string; |
2814 | int priority; | |
2815 | int after_string_p; | |
2816 | }; | |
2817 | ||
2818 | ||
2819 | /* Set up iterator IT from overlay strings at its current position. | |
2820 | Called from handle_stop. */ | |
2821 | ||
2822 | static enum prop_handled | |
2823 | handle_overlay_change (it) | |
2824 | struct it *it; | |
2825 | { | |
2970b9be GM |
2826 | if (!STRINGP (it->string) && get_overlay_strings (it)) |
2827 | return HANDLED_RECOMPUTE_PROPS; | |
5f5c8ee5 | 2828 | else |
2970b9be | 2829 | return HANDLED_NORMALLY; |
5f5c8ee5 GM |
2830 | } |
2831 | ||
2832 | ||
2833 | /* Set up the next overlay string for delivery by IT, if there is an | |
2834 | overlay string to deliver. Called by set_iterator_to_next when the | |
2835 | end of the current overlay string is reached. If there are more | |
2836 | overlay strings to display, IT->string and | |
2837 | IT->current.overlay_string_index are set appropriately here. | |
2838 | Otherwise IT->string is set to nil. */ | |
2839 | ||
2840 | static void | |
2841 | next_overlay_string (it) | |
2842 | struct it *it; | |
2843 | { | |
2844 | ++it->current.overlay_string_index; | |
2845 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2846 | { | |
2847 | /* No more overlay strings. Restore IT's settings to what | |
2848 | they were before overlay strings were processed, and | |
2849 | continue to deliver from current_buffer. */ | |
2850 | pop_it (it); | |
2851 | xassert (it->stop_charpos >= BEGV | |
2852 | && it->stop_charpos <= it->end_charpos); | |
2853 | it->string = Qnil; | |
2854 | it->current.overlay_string_index = -1; | |
2855 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2856 | it->n_overlay_strings = 0; | |
2857 | it->method = next_element_from_buffer; | |
2970b9be GM |
2858 | |
2859 | /* If we're at the end of the buffer, record that we have | |
2860 | processed the overlay strings there already, so that | |
2861 | next_element_from_buffer doesn't try it again. */ | |
2862 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
2863 | it->overlay_strings_at_end_processed_p = 1; | |
5f5c8ee5 GM |
2864 | } |
2865 | else | |
2866 | { | |
2867 | /* There are more overlay strings to process. If | |
2868 | IT->current.overlay_string_index has advanced to a position | |
2869 | where we must load IT->overlay_strings with more strings, do | |
2870 | it. */ | |
2871 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2872 | ||
2873 | if (it->current.overlay_string_index && i == 0) | |
2874 | load_overlay_strings (it); | |
2875 | ||
2876 | /* Initialize IT to deliver display elements from the overlay | |
2877 | string. */ | |
2878 | it->string = it->overlay_strings[i]; | |
2879 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2880 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2881 | it->method = next_element_from_string; | |
2882 | it->stop_charpos = 0; | |
2883 | } | |
2884 | ||
2885 | CHECK_IT (it); | |
2886 | } | |
2887 | ||
2888 | ||
2889 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2890 | comparison function for qsort in load_overlay_strings. Overlay | |
2891 | strings for the same position are sorted so that | |
2892 | ||
2970b9be GM |
2893 | 1. All after-strings come in front of before-strings, except |
2894 | when they come from the same overlay. | |
5f5c8ee5 GM |
2895 | |
2896 | 2. Within after-strings, strings are sorted so that overlay strings | |
2897 | from overlays with higher priorities come first. | |
2898 | ||
2899 | 2. Within before-strings, strings are sorted so that overlay | |
2900 | strings from overlays with higher priorities come last. | |
2901 | ||
2902 | Value is analogous to strcmp. */ | |
2903 | ||
2904 | ||
2905 | static int | |
2906 | compare_overlay_entries (e1, e2) | |
2907 | void *e1, *e2; | |
2908 | { | |
2909 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2910 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2911 | int result; | |
2912 | ||
2913 | if (entry1->after_string_p != entry2->after_string_p) | |
2970b9be GM |
2914 | { |
2915 | /* Let after-strings appear in front of before-strings if | |
2916 | they come from different overlays. */ | |
2917 | if (EQ (entry1->overlay, entry2->overlay)) | |
2918 | result = entry1->after_string_p ? 1 : -1; | |
2919 | else | |
2920 | result = entry1->after_string_p ? -1 : 1; | |
2921 | } | |
5f5c8ee5 GM |
2922 | else if (entry1->after_string_p) |
2923 | /* After-strings sorted in order of decreasing priority. */ | |
2924 | result = entry2->priority - entry1->priority; | |
2925 | else | |
2926 | /* Before-strings sorted in order of increasing priority. */ | |
2927 | result = entry1->priority - entry2->priority; | |
2928 | ||
2929 | return result; | |
2930 | } | |
2931 | ||
2932 | ||
2933 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2934 | current buffer position. Set IT->n_overlays to the total number of | |
2935 | overlay strings found. | |
2936 | ||
2937 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2938 | a time. On entry into load_overlay_strings, | |
2939 | IT->current.overlay_string_index gives the number of overlay | |
2940 | strings that have already been loaded by previous calls to this | |
2941 | function. | |
2942 | ||
2970b9be GM |
2943 | IT->add_overlay_start contains an additional overlay start |
2944 | position to consider for taking overlay strings from, if non-zero. | |
2945 | This position comes into play when the overlay has an `invisible' | |
2946 | property, and both before and after-strings. When we've skipped to | |
2947 | the end of the overlay, because of its `invisible' property, we | |
2948 | nevertheless want its before-string to appear. | |
2949 | IT->add_overlay_start will contain the overlay start position | |
2950 | in this case. | |
2951 | ||
5f5c8ee5 GM |
2952 | Overlay strings are sorted so that after-string strings come in |
2953 | front of before-string strings. Within before and after-strings, | |
2954 | strings are sorted by overlay priority. See also function | |
2955 | compare_overlay_entries. */ | |
2956 | ||
2957 | static void | |
2958 | load_overlay_strings (it) | |
2959 | struct it *it; | |
2960 | { | |
2961 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2962 | Lisp_Object ov, overlay, window, str; | |
2963 | int start, end; | |
2964 | int size = 20; | |
2965 | int n = 0, i, j; | |
2966 | struct overlay_entry *entries | |
2967 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2968 | ||
2969 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2970 | `entries' which has size `size' and currently contains `n' | |
2971 | elements. AFTER_P non-zero means STRING is an after-string of | |
2972 | OVERLAY. */ | |
2973 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2974 | do \ | |
2975 | { \ | |
2976 | Lisp_Object priority; \ | |
2977 | \ | |
2978 | if (n == size) \ | |
2979 | { \ | |
2980 | int new_size = 2 * size; \ | |
2981 | struct overlay_entry *old = entries; \ | |
2982 | entries = \ | |
2983 | (struct overlay_entry *) alloca (new_size \ | |
2984 | * sizeof *entries); \ | |
2985 | bcopy (old, entries, size * sizeof *entries); \ | |
2986 | size = new_size; \ | |
2987 | } \ | |
2988 | \ | |
2989 | entries[n].string = (STRING); \ | |
2970b9be | 2990 | entries[n].overlay = (OVERLAY); \ |
5f5c8ee5 | 2991 | priority = Foverlay_get ((OVERLAY), Qpriority); \ |
2970b9be | 2992 | entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \ |
5f5c8ee5 GM |
2993 | entries[n].after_string_p = (AFTER_P); \ |
2994 | ++n; \ | |
2995 | } \ | |
2996 | while (0) | |
2997 | ||
2998 | /* Process overlay before the overlay center. */ | |
2970b9be | 2999 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3000 | { |
9472f927 | 3001 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3002 | xassert (OVERLAYP (overlay)); |
3003 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3004 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3005 | ||
3006 | if (end < IT_CHARPOS (*it)) | |
3007 | break; | |
3008 | ||
3009 | /* Skip this overlay if it doesn't start or end at IT's current | |
3010 | position. */ | |
2970b9be GM |
3011 | if (end != IT_CHARPOS (*it) |
3012 | && start != IT_CHARPOS (*it) | |
3013 | && it->add_overlay_start != IT_CHARPOS (*it)) | |
5f5c8ee5 GM |
3014 | continue; |
3015 | ||
3016 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3017 | window = Foverlay_get (overlay, Qwindow); | |
3018 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3019 | continue; | |
3020 | ||
3021 | /* If overlay has a non-empty before-string, record it. */ | |
2970b9be GM |
3022 | if ((start == IT_CHARPOS (*it) |
3023 | || start == it->add_overlay_start) | |
5f5c8ee5 GM |
3024 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
3025 | && XSTRING (str)->size) | |
3026 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
3027 | ||
3028 | /* If overlay has a non-empty after-string, record it. */ | |
3029 | if (end == IT_CHARPOS (*it) | |
3030 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
3031 | && XSTRING (str)->size) | |
3032 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
3033 | } | |
3034 | ||
3035 | /* Process overlays after the overlay center. */ | |
2970b9be | 3036 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
5f5c8ee5 | 3037 | { |
9472f927 | 3038 | overlay = XCAR (ov); |
5f5c8ee5 GM |
3039 | xassert (OVERLAYP (overlay)); |
3040 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3041 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3042 | ||
3043 | if (start > IT_CHARPOS (*it)) | |
3044 | break; | |
3045 | ||
3046 | /* Skip this overlay if it doesn't start or end at IT's current | |
3047 | position. */ | |
2970b9be GM |
3048 | if (end != IT_CHARPOS (*it) |
3049 | && start != IT_CHARPOS (*it) | |
3050 | && it->add_overlay_start != IT_CHARPOS (*it)) | |
5f5c8ee5 GM |
3051 | continue; |
3052 | ||
3053 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
3054 | window = Foverlay_get (overlay, Qwindow); | |
3055 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
3056 | continue; | |
3057 | ||
3058 | /* If overlay has a non-empty before-string, record it. */ | |
2970b9be GM |
3059 | if ((start == IT_CHARPOS (*it) |
3060 | || start == it->add_overlay_start) | |
5f5c8ee5 GM |
3061 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) |
3062 | && XSTRING (str)->size) | |
3063 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
3064 | ||
3065 | /* If overlay has a non-empty after-string, record it. */ | |
3066 | if (end == IT_CHARPOS (*it) | |
3067 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
3068 | && XSTRING (str)->size) | |
3069 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
3070 | } | |
3071 | ||
3072 | #undef RECORD_OVERLAY_STRING | |
3073 | ||
3074 | /* Sort entries. */ | |
2970b9be GM |
3075 | if (n) |
3076 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
5f5c8ee5 GM |
3077 | |
3078 | /* Record the total number of strings to process. */ | |
3079 | it->n_overlay_strings = n; | |
3080 | ||
3081 | /* IT->current.overlay_string_index is the number of overlay strings | |
3082 | that have already been consumed by IT. Copy some of the | |
3083 | remaining overlay strings to IT->overlay_strings. */ | |
3084 | i = 0; | |
3085 | j = it->current.overlay_string_index; | |
3086 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
3087 | it->overlay_strings[i++] = entries[j++].string; | |
2970b9be | 3088 | |
5f5c8ee5 GM |
3089 | CHECK_IT (it); |
3090 | } | |
3091 | ||
3092 | ||
3093 | /* Get the first chunk of overlay strings at IT's current buffer | |
3094 | position. Value is non-zero if at least one overlay string was | |
3095 | found. */ | |
3096 | ||
3097 | static int | |
3098 | get_overlay_strings (it) | |
3099 | struct it *it; | |
3100 | { | |
3101 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
3102 | process. This fills IT->overlay_strings with strings, and sets | |
3103 | IT->n_overlay_strings to the total number of strings to process. | |
3104 | IT->pos.overlay_string_index has to be set temporarily to zero | |
3105 | because load_overlay_strings needs this; it must be set to -1 | |
3106 | when no overlay strings are found because a zero value would | |
3107 | indicate a position in the first overlay string. */ | |
3108 | it->current.overlay_string_index = 0; | |
3109 | load_overlay_strings (it); | |
3110 | ||
3111 | /* If we found overlay strings, set up IT to deliver display | |
3112 | elements from the first one. Otherwise set up IT to deliver | |
3113 | from current_buffer. */ | |
3114 | if (it->n_overlay_strings) | |
3115 | { | |
3116 | /* Make sure we know settings in current_buffer, so that we can | |
3117 | restore meaningful values when we're done with the overlay | |
3118 | strings. */ | |
3119 | compute_stop_pos (it); | |
3120 | xassert (it->face_id >= 0); | |
3121 | ||
3122 | /* Save IT's settings. They are restored after all overlay | |
3123 | strings have been processed. */ | |
3124 | xassert (it->sp == 0); | |
3125 | push_it (it); | |
3126 | ||
3127 | /* Set up IT to deliver display elements from the first overlay | |
3128 | string. */ | |
3129 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
3130 | it->stop_charpos = 0; | |
3131 | it->string = it->overlay_strings[0]; | |
3132 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
3133 | xassert (STRINGP (it->string)); | |
3134 | it->method = next_element_from_string; | |
3135 | } | |
3136 | else | |
3137 | { | |
3138 | it->string = Qnil; | |
3139 | it->current.overlay_string_index = -1; | |
3140 | it->method = next_element_from_buffer; | |
3141 | } | |
3142 | ||
3143 | CHECK_IT (it); | |
3144 | ||
3145 | /* Value is non-zero if we found at least one overlay string. */ | |
3146 | return STRINGP (it->string); | |
3147 | } | |
3148 | ||
3149 | ||
3150 | \f | |
3151 | /*********************************************************************** | |
3152 | Saving and restoring state | |
3153 | ***********************************************************************/ | |
3154 | ||
3155 | /* Save current settings of IT on IT->stack. Called, for example, | |
3156 | before setting up IT for an overlay string, to be able to restore | |
3157 | IT's settings to what they were after the overlay string has been | |
3158 | processed. */ | |
3159 | ||
3160 | static void | |
3161 | push_it (it) | |
3162 | struct it *it; | |
3163 | { | |
3164 | struct iterator_stack_entry *p; | |
3165 | ||
3166 | xassert (it->sp < 2); | |
3167 | p = it->stack + it->sp; | |
3168 | ||
3169 | p->stop_charpos = it->stop_charpos; | |
3170 | xassert (it->face_id >= 0); | |
3171 | p->face_id = it->face_id; | |
3172 | p->string = it->string; | |
3173 | p->pos = it->current; | |
3174 | p->end_charpos = it->end_charpos; | |
3175 | p->string_nchars = it->string_nchars; | |
3176 | p->area = it->area; | |
3177 | p->multibyte_p = it->multibyte_p; | |
3178 | p->space_width = it->space_width; | |
3179 | p->font_height = it->font_height; | |
3180 | p->voffset = it->voffset; | |
3181 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
3182 | ++it->sp; | |
3183 | } | |
3184 | ||
3185 | ||
3186 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
3187 | more overlay strings must be processed, and we return to delivering | |
3188 | display elements from a buffer, or when the end of a string from a | |
3189 | `display' property is reached and we return to delivering display | |
3190 | elements from an overlay string, or from a buffer. */ | |
3191 | ||
3192 | static void | |
3193 | pop_it (it) | |
3194 | struct it *it; | |
3195 | { | |
3196 | struct iterator_stack_entry *p; | |
3197 | ||
3198 | xassert (it->sp > 0); | |
3199 | --it->sp; | |
3200 | p = it->stack + it->sp; | |
3201 | it->stop_charpos = p->stop_charpos; | |
3202 | it->face_id = p->face_id; | |
3203 | it->string = p->string; | |
3204 | it->current = p->pos; | |
3205 | it->end_charpos = p->end_charpos; | |
3206 | it->string_nchars = p->string_nchars; | |
3207 | it->area = p->area; | |
3208 | it->multibyte_p = p->multibyte_p; | |
3209 | it->space_width = p->space_width; | |
3210 | it->font_height = p->font_height; | |
3211 | it->voffset = p->voffset; | |
3212 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3213 | } | |
3214 | ||
3215 | ||
3216 | \f | |
3217 | /*********************************************************************** | |
3218 | Moving over lines | |
3219 | ***********************************************************************/ | |
3220 | ||
3221 | /* Set IT's current position to the previous line start. */ | |
3222 | ||
3223 | static void | |
3224 | back_to_previous_line_start (it) | |
3225 | struct it *it; | |
3226 | { | |
3227 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3228 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3229 | } | |
3230 | ||
3231 | ||
3232 | /* Set IT's current position to the next line start. */ | |
3233 | ||
3234 | static void | |
3235 | forward_to_next_line_start (it) | |
3236 | struct it *it; | |
3237 | { | |
3238 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
3239 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3240 | } | |
3241 | ||
3242 | ||
3243 | /* Set IT's current position to the previous visible line start. Skip | |
3244 | invisible text that is so either due to text properties or due to | |
3245 | selective display. Caution: this does not change IT->current_x and | |
3246 | IT->hpos. */ | |
3247 | ||
3248 | static void | |
3249 | back_to_previous_visible_line_start (it) | |
3250 | struct it *it; | |
3251 | { | |
3252 | int visible_p = 0; | |
3253 | ||
3254 | /* Go back one newline if not on BEGV already. */ | |
3255 | if (IT_CHARPOS (*it) > BEGV) | |
3256 | back_to_previous_line_start (it); | |
3257 | ||
3258 | /* Move over lines that are invisible because of selective display | |
3259 | or text properties. */ | |
3260 | while (IT_CHARPOS (*it) > BEGV | |
3261 | && !visible_p) | |
3262 | { | |
3263 | visible_p = 1; | |
3264 | ||
3265 | /* If selective > 0, then lines indented more than that values | |
3266 | are invisible. */ | |
3267 | if (it->selective > 0 | |
3268 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3269 | it->selective)) | |
3270 | visible_p = 0; | |
5f5c8ee5 GM |
3271 | else |
3272 | { | |
3273 | Lisp_Object prop; | |
3274 | ||
6fc556fd KR |
3275 | prop = Fget_char_property (make_number (IT_CHARPOS (*it)), |
3276 | Qinvisible, it->window); | |
5f5c8ee5 GM |
3277 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) |
3278 | visible_p = 0; | |
3279 | } | |
5f5c8ee5 GM |
3280 | |
3281 | /* Back one more newline if the current one is invisible. */ | |
3282 | if (!visible_p) | |
3283 | back_to_previous_line_start (it); | |
3284 | } | |
3285 | ||
3286 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3287 | xassert (IT_CHARPOS (*it) == BEGV | |
3288 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3289 | CHECK_IT (it); | |
3290 | } | |
3291 | ||
3292 | ||
3293 | /* Reseat iterator IT at the previous visible line start. Skip | |
3294 | invisible text that is so either due to text properties or due to | |
3295 | selective display. At the end, update IT's overlay information, | |
3296 | face information etc. */ | |
3297 | ||
3298 | static void | |
3299 | reseat_at_previous_visible_line_start (it) | |
3300 | struct it *it; | |
3301 | { | |
3302 | back_to_previous_visible_line_start (it); | |
3303 | reseat (it, it->current.pos, 1); | |
3304 | CHECK_IT (it); | |
3305 | } | |
3306 | ||
3307 | ||
3308 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3309 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3310 | preceding the line start. Skip over invisible text that is so | |
3311 | because of selective display. Compute faces, overlays etc at the | |
3312 | new position. Note that this function does not skip over text that | |
3313 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3314 | |
3315 | static void | |
312246d1 | 3316 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3317 | struct it *it; |
312246d1 | 3318 | int on_newline_p; |
5f5c8ee5 GM |
3319 | { |
3320 | /* Restore the buffer position when currently not delivering display | |
3321 | elements from the current buffer. This is the case, for example, | |
3322 | when called at the end of a truncated overlay string. */ | |
3323 | while (it->sp) | |
3324 | pop_it (it); | |
3325 | it->method = next_element_from_buffer; | |
3326 | ||
3327 | /* Otherwise, scan_buffer would not work. */ | |
3328 | if (IT_CHARPOS (*it) < ZV) | |
3329 | { | |
3330 | /* If on a newline, advance past it. Otherwise, find the next | |
3331 | newline which automatically gives us the position following | |
3332 | the newline. */ | |
3333 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3334 | { | |
3335 | ++IT_CHARPOS (*it); | |
3336 | ++IT_BYTEPOS (*it); | |
3337 | } | |
3338 | else | |
3339 | forward_to_next_line_start (it); | |
3340 | ||
3341 | /* We must either have reached the end of the buffer or end up | |
3342 | after a newline. */ | |
3343 | xassert (IT_CHARPOS (*it) == ZV | |
3344 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3345 | ||
3346 | /* Skip over lines that are invisible because they are indented | |
3347 | more than the value of IT->selective. */ | |
3348 | if (it->selective > 0) | |
3349 | while (IT_CHARPOS (*it) < ZV | |
3350 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3351 | it->selective)) | |
3352 | forward_to_next_line_start (it); | |
312246d1 GM |
3353 | |
3354 | /* Position on the newline if we should. */ | |
13f19968 GM |
3355 | if (on_newline_p |
3356 | && IT_CHARPOS (*it) > BEGV | |
3357 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n') | |
312246d1 GM |
3358 | { |
3359 | --IT_CHARPOS (*it); | |
3360 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3361 | } | |
5f5c8ee5 GM |
3362 | |
3363 | /* Set the iterator there. The 0 as the last parameter of | |
3364 | reseat means don't force a text property lookup. The lookup | |
3365 | is then only done if we've skipped past the iterator's | |
3366 | check_charpos'es. This optimization is important because | |
3367 | text property lookups tend to be expensive. */ | |
3368 | reseat (it, it->current.pos, 0); | |
3369 | } | |
3370 | ||
3371 | CHECK_IT (it); | |
3372 | } | |
3373 | ||
3374 | ||
3375 | \f | |
3376 | /*********************************************************************** | |
3377 | Changing an iterator's position | |
3378 | ***********************************************************************/ | |
3379 | ||
3380 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3381 | is non-zero, always check for text properties at the new position. | |
3382 | Otherwise, text properties are only looked up if POS >= | |
3383 | IT->check_charpos of a property. */ | |
3384 | ||
3385 | static void | |
3386 | reseat (it, pos, force_p) | |
3387 | struct it *it; | |
3388 | struct text_pos pos; | |
3389 | int force_p; | |
3390 | { | |
3391 | int original_pos = IT_CHARPOS (*it); | |
3392 | ||
3393 | reseat_1 (it, pos, 0); | |
3394 | ||
3395 | /* Determine where to check text properties. Avoid doing it | |
3396 | where possible because text property lookup is very expensive. */ | |
3397 | if (force_p | |
3398 | || CHARPOS (pos) > it->stop_charpos | |
3399 | || CHARPOS (pos) < original_pos) | |
3400 | handle_stop (it); | |
3401 | ||
3402 | CHECK_IT (it); | |
3403 | } | |
3404 | ||
3405 | ||
3406 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3407 | IT->stop_pos to POS, also. */ | |
3408 | ||
3409 | static void | |
3410 | reseat_1 (it, pos, set_stop_p) | |
3411 | struct it *it; | |
3412 | struct text_pos pos; | |
3413 | int set_stop_p; | |
3414 | { | |
3415 | /* Don't call this function when scanning a C string. */ | |
3416 | xassert (it->s == NULL); | |
3417 | ||
3418 | /* POS must be a reasonable value. */ | |
3419 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3420 | ||
3421 | it->current.pos = it->position = pos; | |
3422 | XSETBUFFER (it->object, current_buffer); | |
3423 | it->dpvec = NULL; | |
3424 | it->current.dpvec_index = -1; | |
3425 | it->current.overlay_string_index = -1; | |
3426 | IT_STRING_CHARPOS (*it) = -1; | |
3427 | IT_STRING_BYTEPOS (*it) = -1; | |
3428 | it->string = Qnil; | |
3429 | it->method = next_element_from_buffer; | |
3430 | it->sp = 0; | |
3431 | ||
3432 | if (set_stop_p) | |
3433 | it->stop_charpos = CHARPOS (pos); | |
3434 | } | |
3435 | ||
3436 | ||
3437 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3438 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3439 | STRING gives a Lisp string to iterate over. | |
3440 | ||
3441 | If PRECISION > 0, don't return more then PRECISION number of | |
3442 | characters from the string. | |
3443 | ||
3444 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3445 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3446 | field width. | |
3447 | ||
3448 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3449 | MULTIBYTE > 0 means enable it, | |
3450 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3451 | ||
3452 | IT must be initialized via a prior call to init_iterator before | |
3453 | calling this function. */ | |
3454 | ||
3455 | static void | |
3456 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3457 | struct it *it; | |
3458 | unsigned char *s; | |
3459 | Lisp_Object string; | |
3460 | int charpos; | |
3461 | int precision, field_width, multibyte; | |
3462 | { | |
3463 | /* No region in strings. */ | |
3464 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3465 | ||
3466 | /* No text property checks performed by default, but see below. */ | |
3467 | it->stop_charpos = -1; | |
3468 | ||
3469 | /* Set iterator position and end position. */ | |
3470 | bzero (&it->current, sizeof it->current); | |
3471 | it->current.overlay_string_index = -1; | |
3472 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
3473 | xassert (charpos >= 0); |
3474 | ||
3475 | /* Use the setting of MULTIBYTE if specified. */ | |
3476 | if (multibyte >= 0) | |
3477 | it->multibyte_p = multibyte > 0; | |
3478 | ||
3479 | if (s == NULL) | |
3480 | { | |
3481 | xassert (STRINGP (string)); | |
3482 | it->string = string; | |
3483 | it->s = NULL; | |
3484 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3485 | it->method = next_element_from_string; | |
3486 | it->current.string_pos = string_pos (charpos, string); | |
3487 | } | |
3488 | else | |
3489 | { | |
3490 | it->s = s; | |
3491 | it->string = Qnil; | |
3492 | ||
3493 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3494 | for displaying C strings. */ | |
3495 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3496 | if (it->multibyte_p) | |
3497 | { | |
3498 | it->current.pos = c_string_pos (charpos, s, 1); | |
3499 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3500 | } | |
3501 | else | |
3502 | { | |
3503 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3504 | it->end_charpos = it->string_nchars = strlen (s); | |
3505 | } | |
3506 | ||
3507 | it->method = next_element_from_c_string; | |
3508 | } | |
3509 | ||
3510 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3511 | from the string. */ | |
3512 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3513 | it->end_charpos = it->string_nchars = charpos + precision; | |
3514 | ||
3515 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3516 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3517 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3518 | padding with `-' at the end of a mode line. */ | |
3519 | if (field_width < 0) | |
3520 | field_width = INFINITY; | |
3521 | if (field_width > it->end_charpos - charpos) | |
3522 | it->end_charpos = charpos + field_width; | |
3523 | ||
3524 | /* Use the standard display table for displaying strings. */ | |
3525 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3526 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3527 | ||
3528 | it->stop_charpos = charpos; | |
3529 | CHECK_IT (it); | |
3530 | } | |
3531 | ||
3532 | ||
3533 | \f | |
3534 | /*********************************************************************** | |
3535 | Iteration | |
3536 | ***********************************************************************/ | |
3537 | ||
3538 | /* Load IT's display element fields with information about the next | |
3539 | display element from the current position of IT. Value is zero if | |
3540 | end of buffer (or C string) is reached. */ | |
3541 | ||
3542 | int | |
3543 | get_next_display_element (it) | |
3544 | struct it *it; | |
3545 | { | |
3546 | /* Non-zero means that we found an display element. Zero means that | |
3547 | we hit the end of what we iterate over. Performance note: the | |
3548 | function pointer `method' used here turns out to be faster than | |
3549 | using a sequence of if-statements. */ | |
3550 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
3551 | |
3552 | if (it->what == IT_CHARACTER) | |
3553 | { | |
3554 | /* Map via display table or translate control characters. | |
3555 | IT->c, IT->len etc. have been set to the next character by | |
3556 | the function call above. If we have a display table, and it | |
3557 | contains an entry for IT->c, translate it. Don't do this if | |
3558 | IT->c itself comes from a display table, otherwise we could | |
3559 | end up in an infinite recursion. (An alternative could be to | |
3560 | count the recursion depth of this function and signal an | |
3561 | error when a certain maximum depth is reached.) Is it worth | |
3562 | it? */ | |
3563 | if (success_p && it->dpvec == NULL) | |
3564 | { | |
3565 | Lisp_Object dv; | |
3566 | ||
3567 | if (it->dp | |
3568 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3569 | VECTORP (dv))) | |
3570 | { | |
3571 | struct Lisp_Vector *v = XVECTOR (dv); | |
3572 | ||
3573 | /* Return the first character from the display table | |
3574 | entry, if not empty. If empty, don't display the | |
3575 | current character. */ | |
3576 | if (v->size) | |
3577 | { | |
3578 | it->dpvec_char_len = it->len; | |
3579 | it->dpvec = v->contents; | |
3580 | it->dpend = v->contents + v->size; | |
3581 | it->current.dpvec_index = 0; | |
3582 | it->method = next_element_from_display_vector; | |
3583 | } | |
3584 | ||
3585 | success_p = get_next_display_element (it); | |
3586 | } | |
3587 | ||
3588 | /* Translate control characters into `\003' or `^C' form. | |
3589 | Control characters coming from a display table entry are | |
3590 | currently not translated because we use IT->dpvec to hold | |
3591 | the translation. This could easily be changed but I | |
197516c2 KH |
3592 | don't believe that it is worth doing. |
3593 | ||
3594 | Non-printable multibyte characters are also translated | |
3595 | octal form. */ | |
5f5c8ee5 GM |
3596 | else if ((it->c < ' ' |
3597 | && (it->area != TEXT_AREA | |
c6e89d6c | 3598 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 3599 | || (it->c >= 127 |
197516c2 KH |
3600 | && it->len == 1) |
3601 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
3602 | { |
3603 | /* IT->c is a control character which must be displayed | |
3604 | either as '\003' or as `^C' where the '\\' and '^' | |
3605 | can be defined in the display table. Fill | |
3606 | IT->ctl_chars with glyphs for what we have to | |
3607 | display. Then, set IT->dpvec to these glyphs. */ | |
3608 | GLYPH g; | |
3609 | ||
54c85a23 | 3610 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3611 | { |
3612 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3613 | if (it->dp | |
3614 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3615 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3616 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3617 | else | |
3618 | g = FAST_MAKE_GLYPH ('^', 0); | |
3619 | XSETINT (it->ctl_chars[0], g); | |
3620 | ||
3621 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3622 | XSETINT (it->ctl_chars[1], g); | |
3623 | ||
3624 | /* Set up IT->dpvec and return first character from it. */ | |
3625 | it->dpvec_char_len = it->len; | |
3626 | it->dpvec = it->ctl_chars; | |
3627 | it->dpend = it->dpvec + 2; | |
3628 | it->current.dpvec_index = 0; | |
3629 | it->method = next_element_from_display_vector; | |
3630 | get_next_display_element (it); | |
3631 | } | |
3632 | else | |
3633 | { | |
260a86a0 | 3634 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c5924f47 | 3635 | int len; |
197516c2 KH |
3636 | int i; |
3637 | GLYPH escape_glyph; | |
3638 | ||
5f5c8ee5 GM |
3639 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
3640 | if (it->dp | |
3641 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3642 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 3643 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 3644 | else |
197516c2 KH |
3645 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
3646 | ||
c5924f47 KH |
3647 | if (SINGLE_BYTE_CHAR_P (it->c)) |
3648 | str[0] = it->c, len = 1; | |
3649 | else | |
3650 | len = CHAR_STRING (it->c, str); | |
3651 | ||
197516c2 KH |
3652 | for (i = 0; i < len; i++) |
3653 | { | |
3654 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
3655 | /* Insert three more glyphs into IT->ctl_chars for | |
3656 | the octal display of the character. */ | |
3657 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
3658 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
3659 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
3660 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
3661 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
3662 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
3663 | } | |
5f5c8ee5 GM |
3664 | |
3665 | /* Set up IT->dpvec and return the first character | |
3666 | from it. */ | |
3667 | it->dpvec_char_len = it->len; | |
3668 | it->dpvec = it->ctl_chars; | |
197516c2 | 3669 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
3670 | it->current.dpvec_index = 0; |
3671 | it->method = next_element_from_display_vector; | |
3672 | get_next_display_element (it); | |
3673 | } | |
3674 | } | |
3675 | } | |
3676 | ||
980806b6 KH |
3677 | /* Adjust face id for a multibyte character. There are no |
3678 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
3679 | if (it->multibyte_p |
3680 | && success_p | |
980806b6 | 3681 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 3682 | { |
980806b6 KH |
3683 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
3684 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
3685 | } |
3686 | } | |
3687 | ||
3688 | /* Is this character the last one of a run of characters with | |
3689 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3690 | if (it->face_box_p | |
3691 | && it->s == NULL) | |
3692 | { | |
3693 | int face_id; | |
3694 | struct face *face; | |
3695 | ||
3696 | it->end_of_box_run_p | |
3697 | = ((face_id = face_after_it_pos (it), | |
3698 | face_id != it->face_id) | |
3699 | && (face = FACE_FROM_ID (it->f, face_id), | |
3700 | face->box == FACE_NO_BOX)); | |
3701 | } | |
3702 | ||
3703 | /* Value is 0 if end of buffer or string reached. */ | |
3704 | return success_p; | |
3705 | } | |
3706 | ||
3707 | ||
3708 | /* Move IT to the next display element. | |
3709 | ||
3710 | Functions get_next_display_element and set_iterator_to_next are | |
3711 | separate because I find this arrangement easier to handle than a | |
3712 | get_next_display_element function that also increments IT's | |
3713 | position. The way it is we can first look at an iterator's current | |
3714 | display element, decide whether it fits on a line, and if it does, | |
3715 | increment the iterator position. The other way around we probably | |
3716 | would either need a flag indicating whether the iterator has to be | |
3717 | incremented the next time, or we would have to implement a | |
3718 | decrement position function which would not be easy to write. */ | |
3719 | ||
3720 | void | |
3721 | set_iterator_to_next (it) | |
3722 | struct it *it; | |
3723 | { | |
3724 | if (it->method == next_element_from_buffer) | |
3725 | { | |
3726 | /* The current display element of IT is a character from | |
3727 | current_buffer. Advance in the buffer, and maybe skip over | |
3728 | invisible lines that are so because of selective display. */ | |
3729 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3730 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3731 | else |
3732 | { | |
3733 | xassert (it->len != 0); | |
3734 | IT_BYTEPOS (*it) += it->len; | |
3735 | IT_CHARPOS (*it) += 1; | |
3736 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3737 | } | |
3738 | } | |
260a86a0 KH |
3739 | else if (it->method == next_element_from_composition) |
3740 | { | |
3741 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
3742 | if (STRINGP (it->string)) | |
3743 | { | |
3744 | IT_STRING_BYTEPOS (*it) += it->len; | |
3745 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
3746 | it->method = next_element_from_string; | |
3747 | goto consider_string_end; | |
3748 | } | |
3749 | else | |
3750 | { | |
3751 | IT_BYTEPOS (*it) += it->len; | |
3752 | IT_CHARPOS (*it) += it->cmp_len; | |
3753 | it->method = next_element_from_buffer; | |
3754 | } | |
3755 | } | |
5f5c8ee5 GM |
3756 | else if (it->method == next_element_from_c_string) |
3757 | { | |
3758 | /* Current display element of IT is from a C string. */ | |
3759 | IT_BYTEPOS (*it) += it->len; | |
3760 | IT_CHARPOS (*it) += 1; | |
3761 | } | |
3762 | else if (it->method == next_element_from_display_vector) | |
3763 | { | |
3764 | /* Current display element of IT is from a display table entry. | |
3765 | Advance in the display table definition. Reset it to null if | |
3766 | end reached, and continue with characters from buffers/ | |
3767 | strings. */ | |
3768 | ++it->current.dpvec_index; | |
286bcbc9 | 3769 | |
980806b6 KH |
3770 | /* Restore face of the iterator to what they were before the |
3771 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 3772 | it->face_id = it->saved_face_id; |
286bcbc9 | 3773 | |
5f5c8ee5 GM |
3774 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3775 | { | |
3776 | if (it->s) | |
3777 | it->method = next_element_from_c_string; | |
3778 | else if (STRINGP (it->string)) | |
3779 | it->method = next_element_from_string; | |
3780 | else | |
3781 | it->method = next_element_from_buffer; | |
3782 | ||
3783 | it->dpvec = NULL; | |
3784 | it->current.dpvec_index = -1; | |
3785 | ||
312246d1 GM |
3786 | /* Skip over characters which were displayed via IT->dpvec. */ |
3787 | if (it->dpvec_char_len < 0) | |
3788 | reseat_at_next_visible_line_start (it, 1); | |
3789 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3790 | { |
3791 | it->len = it->dpvec_char_len; | |
3792 | set_iterator_to_next (it); | |
3793 | } | |
3794 | } | |
3795 | } | |
3796 | else if (it->method == next_element_from_string) | |
3797 | { | |
3798 | /* Current display element is a character from a Lisp string. */ | |
3799 | xassert (it->s == NULL && STRINGP (it->string)); | |
3800 | IT_STRING_BYTEPOS (*it) += it->len; | |
3801 | IT_STRING_CHARPOS (*it) += 1; | |
3802 | ||
3803 | consider_string_end: | |
3804 | ||
3805 | if (it->current.overlay_string_index >= 0) | |
3806 | { | |
3807 | /* IT->string is an overlay string. Advance to the | |
3808 | next, if there is one. */ | |
3809 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3810 | next_overlay_string (it); | |
3811 | } | |
3812 | else | |
3813 | { | |
3814 | /* IT->string is not an overlay string. If we reached | |
3815 | its end, and there is something on IT->stack, proceed | |
3816 | with what is on the stack. This can be either another | |
3817 | string, this time an overlay string, or a buffer. */ | |
3818 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3819 | && it->sp > 0) | |
3820 | { | |
3821 | pop_it (it); | |
3822 | if (!STRINGP (it->string)) | |
3823 | it->method = next_element_from_buffer; | |
3824 | } | |
3825 | } | |
3826 | } | |
3827 | else if (it->method == next_element_from_image | |
3828 | || it->method == next_element_from_stretch) | |
3829 | { | |
3830 | /* The position etc with which we have to proceed are on | |
3831 | the stack. The position may be at the end of a string, | |
3832 | if the `display' property takes up the whole string. */ | |
3833 | pop_it (it); | |
3834 | it->image_id = 0; | |
3835 | if (STRINGP (it->string)) | |
3836 | { | |
3837 | it->method = next_element_from_string; | |
3838 | goto consider_string_end; | |
3839 | } | |
3840 | else | |
3841 | it->method = next_element_from_buffer; | |
3842 | } | |
3843 | else | |
3844 | /* There are no other methods defined, so this should be a bug. */ | |
3845 | abort (); | |
3846 | ||
3847 | /* Reset flags indicating start and end of a sequence of | |
3848 | characters with box. */ | |
3849 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3850 | ||
3851 | xassert (it->method != next_element_from_string | |
3852 | || (STRINGP (it->string) | |
3853 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3854 | } | |
3855 | ||
3856 | ||
3857 | /* Load IT's display element fields with information about the next | |
3858 | display element which comes from a display table entry or from the | |
3859 | result of translating a control character to one of the forms `^C' | |
3860 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3861 | ||
3862 | static int | |
3863 | next_element_from_display_vector (it) | |
3864 | struct it *it; | |
3865 | { | |
3866 | /* Precondition. */ | |
3867 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3868 | ||
3869 | /* Remember the current face id in case glyphs specify faces. | |
3870 | IT's face is restored in set_iterator_to_next. */ | |
3871 | it->saved_face_id = it->face_id; | |
3872 | ||
3873 | if (INTEGERP (*it->dpvec) | |
3874 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3875 | { | |
3876 | int lface_id; | |
3877 | GLYPH g; | |
3878 | ||
3879 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3880 | it->c = FAST_GLYPH_CHAR (g); | |
c5924f47 | 3881 | it->len = CHAR_BYTES (it->c); |
5f5c8ee5 GM |
3882 | |
3883 | /* The entry may contain a face id to use. Such a face id is | |
3884 | the id of a Lisp face, not a realized face. A face id of | |
969065c3 | 3885 | zero means no face is specified. */ |
5f5c8ee5 GM |
3886 | lface_id = FAST_GLYPH_FACE (g); |
3887 | if (lface_id) | |
3888 | { | |
969065c3 | 3889 | /* The function returns -1 if lface_id is invalid. */ |
5f5c8ee5 GM |
3890 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); |
3891 | if (face_id >= 0) | |
969065c3 | 3892 | it->face_id = face_id; |
5f5c8ee5 GM |
3893 | } |
3894 | } | |
3895 | else | |
3896 | /* Display table entry is invalid. Return a space. */ | |
3897 | it->c = ' ', it->len = 1; | |
3898 | ||
3899 | /* Don't change position and object of the iterator here. They are | |
3900 | still the values of the character that had this display table | |
3901 | entry or was translated, and that's what we want. */ | |
3902 | it->what = IT_CHARACTER; | |
3903 | return 1; | |
3904 | } | |
3905 | ||
3906 | ||
3907 | /* Load IT with the next display element from Lisp string IT->string. | |
3908 | IT->current.string_pos is the current position within the string. | |
3909 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3910 | overlay string. */ | |
3911 | ||
3912 | static int | |
3913 | next_element_from_string (it) | |
3914 | struct it *it; | |
3915 | { | |
3916 | struct text_pos position; | |
3917 | ||
3918 | xassert (STRINGP (it->string)); | |
3919 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3920 | position = it->current.string_pos; | |
3921 | ||
3922 | /* Time to check for invisible text? */ | |
3923 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3924 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3925 | { | |
3926 | handle_stop (it); | |
3927 | ||
3928 | /* Since a handler may have changed IT->method, we must | |
3929 | recurse here. */ | |
3930 | return get_next_display_element (it); | |
3931 | } | |
3932 | ||
3933 | if (it->current.overlay_string_index >= 0) | |
3934 | { | |
3935 | /* Get the next character from an overlay string. In overlay | |
3936 | strings, There is no field width or padding with spaces to | |
3937 | do. */ | |
3938 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3939 | { | |
3940 | it->what = IT_EOB; | |
3941 | return 0; | |
3942 | } | |
3943 | else if (STRING_MULTIBYTE (it->string)) | |
3944 | { | |
3945 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3946 | - IT_STRING_BYTEPOS (*it)); | |
3947 | unsigned char *s = (XSTRING (it->string)->data | |
3948 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3949 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3950 | } |
3951 | else | |
3952 | { | |
3953 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3954 | it->len = 1; | |
3955 | } | |
3956 | } | |
3957 | else | |
3958 | { | |
3959 | /* Get the next character from a Lisp string that is not an | |
3960 | overlay string. Such strings come from the mode line, for | |
3961 | example. We may have to pad with spaces, or truncate the | |
3962 | string. See also next_element_from_c_string. */ | |
3963 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3964 | { | |
3965 | it->what = IT_EOB; | |
3966 | return 0; | |
3967 | } | |
3968 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3969 | { | |
3970 | /* Pad with spaces. */ | |
3971 | it->c = ' ', it->len = 1; | |
3972 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3973 | } | |
3974 | else if (STRING_MULTIBYTE (it->string)) | |
3975 | { | |
3976 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3977 | - IT_STRING_BYTEPOS (*it)); | |
3978 | unsigned char *s = (XSTRING (it->string)->data | |
3979 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3980 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3981 | } |
3982 | else | |
3983 | { | |
3984 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3985 | it->len = 1; | |
3986 | } | |
3987 | } | |
3988 | ||
3989 | /* Record what we have and where it came from. Note that we store a | |
3990 | buffer position in IT->position although it could arguably be a | |
3991 | string position. */ | |
3992 | it->what = IT_CHARACTER; | |
3993 | it->object = it->string; | |
3994 | it->position = position; | |
3995 | return 1; | |
3996 | } | |
3997 | ||
3998 | ||
3999 | /* Load IT with next display element from C string IT->s. | |
4000 | IT->string_nchars is the maximum number of characters to return | |
4001 | from the string. IT->end_charpos may be greater than | |
4002 | IT->string_nchars when this function is called, in which case we | |
4003 | may have to return padding spaces. Value is zero if end of string | |
4004 | reached, including padding spaces. */ | |
4005 | ||
4006 | static int | |
4007 | next_element_from_c_string (it) | |
4008 | struct it *it; | |
4009 | { | |
4010 | int success_p = 1; | |
4011 | ||
4012 | xassert (it->s); | |
4013 | it->what = IT_CHARACTER; | |
4014 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
4015 | it->object = Qnil; | |
4016 | ||
4017 | /* IT's position can be greater IT->string_nchars in case a field | |
4018 | width or precision has been specified when the iterator was | |
4019 | initialized. */ | |
4020 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4021 | { | |
4022 | /* End of the game. */ | |
4023 | it->what = IT_EOB; | |
4024 | success_p = 0; | |
4025 | } | |
4026 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
4027 | { | |
4028 | /* Pad with spaces. */ | |
4029 | it->c = ' ', it->len = 1; | |
4030 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
4031 | } | |
4032 | else if (it->multibyte_p) | |
4033 | { | |
4034 | /* Implementation note: The calls to strlen apparently aren't a | |
4035 | performance problem because there is no noticeable performance | |
4036 | difference between Emacs running in unibyte or multibyte mode. */ | |
4037 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
4038 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
4039 | maxlen, &it->len); | |
5f5c8ee5 GM |
4040 | } |
4041 | else | |
4042 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
4043 | ||
4044 | return success_p; | |
4045 | } | |
4046 | ||
4047 | ||
4048 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
4049 | The definition of the ellipsis glyphs may come from a display table | |
4050 | entry. This function Fills IT with the first glyph from the | |
4051 | ellipsis if an ellipsis is to be displayed. */ | |
4052 | ||
13f19968 | 4053 | static int |
5f5c8ee5 GM |
4054 | next_element_from_ellipsis (it) |
4055 | struct it *it; | |
4056 | { | |
13f19968 | 4057 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 4058 | { |
13f19968 GM |
4059 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
4060 | { | |
4061 | /* Use the display table definition for `...'. Invalid glyphs | |
4062 | will be handled by the method returning elements from dpvec. */ | |
4063 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
4064 | it->dpvec_char_len = it->len; | |
4065 | it->dpvec = v->contents; | |
4066 | it->dpend = v->contents + v->size; | |
4067 | it->current.dpvec_index = 0; | |
4068 | it->method = next_element_from_display_vector; | |
4069 | } | |
4070 | else | |
4071 | { | |
4072 | /* Use default `...' which is stored in default_invis_vector. */ | |
4073 | it->dpvec_char_len = it->len; | |
4074 | it->dpvec = default_invis_vector; | |
4075 | it->dpend = default_invis_vector + 3; | |
4076 | it->current.dpvec_index = 0; | |
4077 | it->method = next_element_from_display_vector; | |
4078 | } | |
5f5c8ee5 | 4079 | } |
13f19968 GM |
4080 | else |
4081 | reseat_at_next_visible_line_start (it, 1); | |
4082 | ||
4083 | return get_next_display_element (it); | |
5f5c8ee5 GM |
4084 | } |
4085 | ||
4086 | ||
4087 | /* Deliver an image display element. The iterator IT is already | |
4088 | filled with image information (done in handle_display_prop). Value | |
4089 | is always 1. */ | |
4090 | ||
4091 | ||
4092 | static int | |
4093 | next_element_from_image (it) | |
4094 | struct it *it; | |
4095 | { | |
4096 | it->what = IT_IMAGE; | |
4097 | return 1; | |
4098 | } | |
4099 | ||
4100 | ||
4101 | /* Fill iterator IT with next display element from a stretch glyph | |
4102 | property. IT->object is the value of the text property. Value is | |
4103 | always 1. */ | |
4104 | ||
4105 | static int | |
4106 | next_element_from_stretch (it) | |
4107 | struct it *it; | |
4108 | { | |
4109 | it->what = IT_STRETCH; | |
4110 | return 1; | |
4111 | } | |
4112 | ||
4113 | ||
4114 | /* Load IT with the next display element from current_buffer. Value | |
4115 | is zero if end of buffer reached. IT->stop_charpos is the next | |
4116 | position at which to stop and check for text properties or buffer | |
4117 | end. */ | |
4118 | ||
4119 | static int | |
4120 | next_element_from_buffer (it) | |
4121 | struct it *it; | |
4122 | { | |
4123 | int success_p = 1; | |
4124 | ||
4125 | /* Check this assumption, otherwise, we would never enter the | |
4126 | if-statement, below. */ | |
4127 | xassert (IT_CHARPOS (*it) >= BEGV | |
4128 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
4129 | ||
4130 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
4131 | { | |
4132 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
4133 | { | |
4134 | int overlay_strings_follow_p; | |
4135 | ||
4136 | /* End of the game, except when overlay strings follow that | |
4137 | haven't been returned yet. */ | |
4138 | if (it->overlay_strings_at_end_processed_p) | |
4139 | overlay_strings_follow_p = 0; | |
4140 | else | |
4141 | { | |
4142 | it->overlay_strings_at_end_processed_p = 1; | |
c880678e | 4143 | overlay_strings_follow_p = get_overlay_strings (it); |
5f5c8ee5 GM |
4144 | } |
4145 | ||
4146 | if (overlay_strings_follow_p) | |
4147 | success_p = get_next_display_element (it); | |
4148 | else | |
4149 | { | |
4150 | it->what = IT_EOB; | |
4151 | it->position = it->current.pos; | |
4152 | success_p = 0; | |
4153 | } | |
4154 | } | |
4155 | else | |
4156 | { | |
4157 | handle_stop (it); | |
4158 | return get_next_display_element (it); | |
4159 | } | |
4160 | } | |
4161 | else | |
4162 | { | |
4163 | /* No face changes, overlays etc. in sight, so just return a | |
4164 | character from current_buffer. */ | |
4165 | unsigned char *p; | |
4166 | ||
4167 | /* Maybe run the redisplay end trigger hook. Performance note: | |
4168 | This doesn't seem to cost measurable time. */ | |
4169 | if (it->redisplay_end_trigger_charpos | |
4170 | && it->glyph_row | |
4171 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
4172 | run_redisplay_end_trigger_hook (it); | |
4173 | ||
4174 | /* Get the next character, maybe multibyte. */ | |
4175 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 4176 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
4177 | { |
4178 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
4179 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 4180 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
4181 | } |
4182 | else | |
4183 | it->c = *p, it->len = 1; | |
4184 | ||
4185 | /* Record what we have and where it came from. */ | |
4186 | it->what = IT_CHARACTER;; | |
4187 | it->object = it->w->buffer; | |
4188 | it->position = it->current.pos; | |
4189 | ||
4190 | /* Normally we return the character found above, except when we | |
4191 | really want to return an ellipsis for selective display. */ | |
4192 | if (it->selective) | |
4193 | { | |
4194 | if (it->c == '\n') | |
4195 | { | |
4196 | /* A value of selective > 0 means hide lines indented more | |
4197 | than that number of columns. */ | |
4198 | if (it->selective > 0 | |
4199 | && IT_CHARPOS (*it) + 1 < ZV | |
4200 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
4201 | IT_BYTEPOS (*it) + 1, | |
4202 | it->selective)) | |
312246d1 | 4203 | { |
13f19968 | 4204 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
4205 | it->dpvec_char_len = -1; |
4206 | } | |
5f5c8ee5 GM |
4207 | } |
4208 | else if (it->c == '\r' && it->selective == -1) | |
4209 | { | |
4210 | /* A value of selective == -1 means that everything from the | |
4211 | CR to the end of the line is invisible, with maybe an | |
4212 | ellipsis displayed for it. */ | |
13f19968 | 4213 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4214 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4215 | } |
4216 | } | |
4217 | } | |
4218 | ||
4219 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4220 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4221 | return success_p; |
4222 | } | |
4223 | ||
4224 | ||
4225 | /* Run the redisplay end trigger hook for IT. */ | |
4226 | ||
4227 | static void | |
4228 | run_redisplay_end_trigger_hook (it) | |
4229 | struct it *it; | |
4230 | { | |
4231 | Lisp_Object args[3]; | |
4232 | ||
4233 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4234 | displaying something, or otherwise we should not run the hook. */ | |
4235 | xassert (it->glyph_row); | |
4236 | ||
4237 | /* Set up hook arguments. */ | |
4238 | args[0] = Qredisplay_end_trigger_functions; | |
4239 | args[1] = it->window; | |
4240 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4241 | it->redisplay_end_trigger_charpos = 0; | |
4242 | ||
4243 | /* Since we are *trying* to run these functions, don't try to run | |
4244 | them again, even if they get an error. */ | |
4245 | it->w->redisplay_end_trigger = Qnil; | |
4246 | Frun_hook_with_args (3, args); | |
4247 | ||
4248 | /* Notice if it changed the face of the character we are on. */ | |
4249 | handle_face_prop (it); | |
4250 | } | |
4251 | ||
4252 | ||
260a86a0 KH |
4253 | /* Deliver a composition display element. The iterator IT is already |
4254 | filled with composition information (done in | |
4255 | handle_composition_prop). Value is always 1. */ | |
4256 | ||
4257 | static int | |
4258 | next_element_from_composition (it) | |
4259 | struct it *it; | |
4260 | { | |
4261 | it->what = IT_COMPOSITION; | |
4262 | it->position = (STRINGP (it->string) | |
4263 | ? it->current.string_pos | |
4264 | : it->current.pos); | |
4265 | return 1; | |
4266 | } | |
4267 | ||
4268 | ||
5f5c8ee5 GM |
4269 | \f |
4270 | /*********************************************************************** | |
4271 | Moving an iterator without producing glyphs | |
4272 | ***********************************************************************/ | |
4273 | ||
4274 | /* Move iterator IT to a specified buffer or X position within one | |
4275 | line on the display without producing glyphs. | |
4276 | ||
4277 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
4278 | whichever is reached first. | |
4279 | ||
4280 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
4281 | ||
4282 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
4283 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
4284 | TO_X includes the amount by which a window is horizontally | |
4285 | scrolled. | |
4286 | ||
4287 | Value is | |
4288 | ||
4289 | MOVE_POS_MATCH_OR_ZV | |
4290 | - when TO_POS or ZV was reached. | |
4291 | ||
4292 | MOVE_X_REACHED | |
4293 | -when TO_X was reached before TO_POS or ZV were reached. | |
4294 | ||
4295 | MOVE_LINE_CONTINUED | |
4296 | - when we reached the end of the display area and the line must | |
4297 | be continued. | |
4298 | ||
4299 | MOVE_LINE_TRUNCATED | |
4300 | - when we reached the end of the display area and the line is | |
4301 | truncated. | |
4302 | ||
4303 | MOVE_NEWLINE_OR_CR | |
4304 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
4305 | display is on. */ | |
4306 | ||
701552dd | 4307 | static enum move_it_result |
5f5c8ee5 GM |
4308 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
4309 | struct it *it; | |
4310 | int to_charpos, to_x, op; | |
4311 | { | |
4312 | enum move_it_result result = MOVE_UNDEFINED; | |
4313 | struct glyph_row *saved_glyph_row; | |
4314 | ||
4315 | /* Don't produce glyphs in produce_glyphs. */ | |
4316 | saved_glyph_row = it->glyph_row; | |
4317 | it->glyph_row = NULL; | |
4318 | ||
5f5c8ee5 GM |
4319 | while (1) |
4320 | { | |
ae26e27d | 4321 | int x, i, ascent = 0, descent = 0; |
5f5c8ee5 GM |
4322 | |
4323 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4324 | if (!get_next_display_element (it) | |
4325 | || ((op & MOVE_TO_POS) != 0 | |
4326 | && BUFFERP (it->object) | |
4327 | && IT_CHARPOS (*it) >= to_charpos)) | |
4328 | { | |
4329 | result = MOVE_POS_MATCH_OR_ZV; | |
4330 | break; | |
4331 | } | |
4332 | ||
4333 | /* The call to produce_glyphs will get the metrics of the | |
4334 | display element IT is loaded with. We record in x the | |
4335 | x-position before this display element in case it does not | |
4336 | fit on the line. */ | |
4337 | x = it->current_x; | |
47589c8c GM |
4338 | |
4339 | /* Remember the line height so far in case the next element doesn't | |
4340 | fit on the line. */ | |
4341 | if (!it->truncate_lines_p) | |
4342 | { | |
4343 | ascent = it->max_ascent; | |
4344 | descent = it->max_descent; | |
4345 | } | |
4346 | ||
5f5c8ee5 GM |
4347 | PRODUCE_GLYPHS (it); |
4348 | ||
4349 | if (it->area != TEXT_AREA) | |
4350 | { | |
4351 | set_iterator_to_next (it); | |
4352 | continue; | |
4353 | } | |
4354 | ||
4355 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4356 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4357 | character on a terminal frame, or (iii) a line end. For the | |
4358 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4359 | (on X frames, there is only one glyph produced for a | |
4360 | composite character. | |
4361 | ||
4362 | The behavior implemented below means, for continuation lines, | |
4363 | that as many spaces of a TAB as fit on the current line are | |
4364 | displayed there. For terminal frames, as many glyphs of a | |
4365 | multi-glyph character are displayed in the current line, too. | |
4366 | This is what the old redisplay code did, and we keep it that | |
4367 | way. Under X, the whole shape of a complex character must | |
4368 | fit on the line or it will be completely displayed in the | |
4369 | next line. | |
4370 | ||
4371 | Note that both for tabs and padding glyphs, all glyphs have | |
4372 | the same width. */ | |
4373 | if (it->nglyphs) | |
4374 | { | |
4375 | /* More than one glyph or glyph doesn't fit on line. All | |
4376 | glyphs have the same width. */ | |
4377 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4378 | int new_x; | |
4379 | ||
4380 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4381 | { | |
4382 | new_x = x + single_glyph_width; | |
4383 | ||
4384 | /* We want to leave anything reaching TO_X to the caller. */ | |
4385 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4386 | { | |
4387 | it->current_x = x; | |
4388 | result = MOVE_X_REACHED; | |
4389 | break; | |
4390 | } | |
4391 | else if (/* Lines are continued. */ | |
4392 | !it->truncate_lines_p | |
4393 | && (/* And glyph doesn't fit on the line. */ | |
4394 | new_x > it->last_visible_x | |
4395 | /* Or it fits exactly and we're on a window | |
4396 | system frame. */ | |
4397 | || (new_x == it->last_visible_x | |
4398 | && FRAME_WINDOW_P (it->f)))) | |
4399 | { | |
4400 | if (/* IT->hpos == 0 means the very first glyph | |
4401 | doesn't fit on the line, e.g. a wide image. */ | |
4402 | it->hpos == 0 | |
4403 | || (new_x == it->last_visible_x | |
4404 | && FRAME_WINDOW_P (it->f))) | |
4405 | { | |
4406 | ++it->hpos; | |
4407 | it->current_x = new_x; | |
4408 | if (i == it->nglyphs - 1) | |
4409 | set_iterator_to_next (it); | |
4410 | } | |
4411 | else | |
47589c8c GM |
4412 | { |
4413 | it->current_x = x; | |
4414 | it->max_ascent = ascent; | |
4415 | it->max_descent = descent; | |
4416 | } | |
4417 | ||
4418 | TRACE_MOVE ((stderr, "move_it_in: continued at %d\n", | |
4419 | IT_CHARPOS (*it))); | |
5f5c8ee5 GM |
4420 | result = MOVE_LINE_CONTINUED; |
4421 | break; | |
4422 | } | |
4423 | else if (new_x > it->first_visible_x) | |
4424 | { | |
4425 | /* Glyph is visible. Increment number of glyphs that | |
4426 | would be displayed. */ | |
4427 | ++it->hpos; | |
4428 | } | |
4429 | else | |
4430 | { | |
4431 | /* Glyph is completely off the left margin of the display | |
4432 | area. Nothing to do. */ | |
4433 | } | |
4434 | } | |
4435 | ||
4436 | if (result != MOVE_UNDEFINED) | |
4437 | break; | |
4438 | } | |
4439 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4440 | { | |
4441 | /* Stop when TO_X specified and reached. This check is | |
4442 | necessary here because of lines consisting of a line end, | |
4443 | only. The line end will not produce any glyphs and we | |
4444 | would never get MOVE_X_REACHED. */ | |
4445 | xassert (it->nglyphs == 0); | |
4446 | result = MOVE_X_REACHED; | |
4447 | break; | |
4448 | } | |
4449 | ||
4450 | /* Is this a line end? If yes, we're done. */ | |
4451 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4452 | { | |
4453 | result = MOVE_NEWLINE_OR_CR; | |
4454 | break; | |
4455 | } | |
4456 | ||
4457 | /* The current display element has been consumed. Advance | |
4458 | to the next. */ | |
4459 | set_iterator_to_next (it); | |
4460 | ||
4461 | /* Stop if lines are truncated and IT's current x-position is | |
4462 | past the right edge of the window now. */ | |
4463 | if (it->truncate_lines_p | |
4464 | && it->current_x >= it->last_visible_x) | |
4465 | { | |
4466 | result = MOVE_LINE_TRUNCATED; | |
4467 | break; | |
4468 | } | |
4469 | } | |
4470 | ||
4471 | /* Restore the iterator settings altered at the beginning of this | |
4472 | function. */ | |
4473 | it->glyph_row = saved_glyph_row; | |
4474 | return result; | |
4475 | } | |
4476 | ||
4477 | ||
4478 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4479 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4480 | the description of enum move_operation_enum. | |
4481 | ||
4482 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4483 | screen line, this function will set IT to the next position > | |
4484 | TO_CHARPOS. */ | |
4485 | ||
4486 | void | |
4487 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4488 | struct it *it; | |
4489 | int to_charpos, to_x, to_y, to_vpos; | |
4490 | int op; | |
4491 | { | |
4492 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4493 | int line_height; | |
47589c8c | 4494 | int reached = 0; |
5f5c8ee5 | 4495 | |
47589c8c | 4496 | for (;;) |
5f5c8ee5 GM |
4497 | { |
4498 | if (op & MOVE_TO_VPOS) | |
4499 | { | |
4500 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4501 | start of the line TO_VPOS. */ | |
4502 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4503 | { | |
4504 | if (it->vpos == to_vpos) | |
47589c8c GM |
4505 | { |
4506 | reached = 1; | |
4507 | break; | |
4508 | } | |
4509 | else | |
4510 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
5f5c8ee5 GM |
4511 | } |
4512 | else | |
4513 | { | |
4514 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4515 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
47589c8c GM |
4516 | if (it->vpos == to_vpos) |
4517 | { | |
4518 | reached = 2; | |
4519 | break; | |
4520 | } | |
4521 | ||
5f5c8ee5 GM |
4522 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); |
4523 | ||
4524 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
47589c8c GM |
4525 | { |
4526 | reached = 3; | |
4527 | break; | |
4528 | } | |
5f5c8ee5 GM |
4529 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) |
4530 | { | |
4531 | /* We have reached TO_X but not in the line we want. */ | |
4532 | skip = move_it_in_display_line_to (it, to_charpos, | |
4533 | -1, MOVE_TO_POS); | |
4534 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
4535 | { |
4536 | reached = 4; | |
4537 | break; | |
4538 | } | |
5f5c8ee5 GM |
4539 | } |
4540 | } | |
4541 | } | |
4542 | else if (op & MOVE_TO_Y) | |
4543 | { | |
4544 | struct it it_backup; | |
5f5c8ee5 GM |
4545 | |
4546 | /* TO_Y specified means stop at TO_X in the line containing | |
4547 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4548 | problem is that we can't really tell whether the line | |
4549 | contains TO_Y before we have completely scanned it, and | |
4550 | this may skip past TO_X. What we do is to first scan to | |
4551 | TO_X. | |
4552 | ||
4553 | If TO_X is not specified, use a TO_X of zero. The reason | |
4554 | is to make the outcome of this function more predictable. | |
4555 | If we didn't use TO_X == 0, we would stop at the end of | |
4556 | the line which is probably not what a caller would expect | |
4557 | to happen. */ | |
4558 | skip = move_it_in_display_line_to (it, to_charpos, | |
4559 | ((op & MOVE_TO_X) | |
4560 | ? to_x : 0), | |
4561 | (MOVE_TO_X | |
4562 | | (op & MOVE_TO_POS))); | |
4563 | ||
4564 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4565 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c GM |
4566 | { |
4567 | reached = 5; | |
4568 | break; | |
4569 | } | |
5f5c8ee5 GM |
4570 | |
4571 | /* If TO_X was reached, we would like to know whether TO_Y | |
4572 | is in the line. This can only be said if we know the | |
4573 | total line height which requires us to scan the rest of | |
4574 | the line. */ | |
5f5c8ee5 GM |
4575 | if (skip == MOVE_X_REACHED) |
4576 | { | |
4577 | it_backup = *it; | |
47589c8c | 4578 | TRACE_MOVE ((stderr, "move_it: from %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
4579 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, |
4580 | op & MOVE_TO_POS); | |
47589c8c | 4581 | TRACE_MOVE ((stderr, "move_it: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
4582 | } |
4583 | ||
4584 | /* Now, decide whether TO_Y is in this line. */ | |
4585 | line_height = it->max_ascent + it->max_descent; | |
47589c8c | 4586 | TRACE_MOVE ((stderr, "move_it: line_height = %d\n", line_height)); |
5f5c8ee5 GM |
4587 | |
4588 | if (to_y >= it->current_y | |
4589 | && to_y < it->current_y + line_height) | |
4590 | { | |
4591 | if (skip == MOVE_X_REACHED) | |
4592 | /* If TO_Y is in this line and TO_X was reached above, | |
4593 | we scanned too far. We have to restore IT's settings | |
4594 | to the ones before skipping. */ | |
4595 | *it = it_backup; | |
47589c8c | 4596 | reached = 6; |
5f5c8ee5 GM |
4597 | } |
4598 | else if (skip == MOVE_X_REACHED) | |
4599 | { | |
4600 | skip = skip2; | |
4601 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
47589c8c | 4602 | reached = 7; |
5f5c8ee5 GM |
4603 | } |
4604 | ||
47589c8c | 4605 | if (reached) |
5f5c8ee5 GM |
4606 | break; |
4607 | } | |
4608 | else | |
4609 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4610 | ||
4611 | switch (skip) | |
4612 | { | |
4613 | case MOVE_POS_MATCH_OR_ZV: | |
47589c8c GM |
4614 | reached = 8; |
4615 | goto out; | |
5f5c8ee5 GM |
4616 | |
4617 | case MOVE_NEWLINE_OR_CR: | |
4618 | set_iterator_to_next (it); | |
4619 | it->continuation_lines_width = 0; | |
4620 | break; | |
4621 | ||
4622 | case MOVE_LINE_TRUNCATED: | |
4623 | it->continuation_lines_width = 0; | |
312246d1 | 4624 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4625 | if ((op & MOVE_TO_POS) != 0 |
4626 | && IT_CHARPOS (*it) > to_charpos) | |
47589c8c GM |
4627 | { |
4628 | reached = 9; | |
4629 | goto out; | |
4630 | } | |
5f5c8ee5 GM |
4631 | break; |
4632 | ||
4633 | case MOVE_LINE_CONTINUED: | |
4634 | it->continuation_lines_width += it->current_x; | |
4635 | break; | |
4636 | ||
4637 | default: | |
4638 | abort (); | |
4639 | } | |
4640 | ||
4641 | /* Reset/increment for the next run. */ | |
4642 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4643 | it->current_x = it->hpos = 0; | |
4644 | it->current_y += it->max_ascent + it->max_descent; | |
4645 | ++it->vpos; | |
4646 | last_height = it->max_ascent + it->max_descent; | |
4647 | last_max_ascent = it->max_ascent; | |
4648 | it->max_ascent = it->max_descent = 0; | |
4649 | } | |
47589c8c GM |
4650 | |
4651 | out: | |
4652 | ||
4653 | TRACE_MOVE ((stderr, "move_it_to: reached %d\n", reached)); | |
5f5c8ee5 GM |
4654 | } |
4655 | ||
4656 | ||
4657 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4658 | ||
4659 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4660 | means move IT backward to the preceding line start or BEGV. This | |
4661 | function may move over more than DY pixels if IT->current_y - DY | |
4662 | ends up in the middle of a line; in this case IT->current_y will be | |
4663 | set to the top of the line moved to. */ | |
4664 | ||
4665 | void | |
4666 | move_it_vertically_backward (it, dy) | |
4667 | struct it *it; | |
4668 | int dy; | |
4669 | { | |
4670 | int nlines, h, line_height; | |
4671 | struct it it2; | |
4672 | int start_pos = IT_CHARPOS (*it); | |
4673 | ||
4674 | xassert (dy >= 0); | |
4675 | ||
4676 | /* Estimate how many newlines we must move back. */ | |
4677 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4678 | ||
4679 | /* Set the iterator's position that many lines back. */ | |
4680 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4681 | back_to_previous_visible_line_start (it); | |
4682 | ||
4683 | /* Reseat the iterator here. When moving backward, we don't want | |
4684 | reseat to skip forward over invisible text, set up the iterator | |
4685 | to deliver from overlay strings at the new position etc. So, | |
4686 | use reseat_1 here. */ | |
4687 | reseat_1 (it, it->current.pos, 1); | |
4688 | ||
4689 | /* We are now surely at a line start. */ | |
4690 | it->current_x = it->hpos = 0; | |
4691 | ||
4692 | /* Move forward and see what y-distance we moved. First move to the | |
4693 | start of the next line so that we get its height. We need this | |
4694 | height to be able to tell whether we reached the specified | |
4695 | y-distance. */ | |
4696 | it2 = *it; | |
4697 | it2.max_ascent = it2.max_descent = 0; | |
4698 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4699 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4700 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4701 | line_height = it2.max_ascent + it2.max_descent; | |
47589c8c | 4702 | |
5f5c8ee5 GM |
4703 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); |
4704 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4705 | h = it2.current_y - it->current_y; | |
4706 | nlines = it2.vpos - it->vpos; | |
4707 | ||
4708 | /* Correct IT's y and vpos position. */ | |
4709 | it->vpos -= nlines; | |
4710 | it->current_y -= h; | |
4711 | ||
4712 | if (dy == 0) | |
4713 | { | |
4714 | /* DY == 0 means move to the start of the screen line. The | |
4715 | value of nlines is > 0 if continuation lines were involved. */ | |
4716 | if (nlines > 0) | |
4717 | move_it_by_lines (it, nlines, 1); | |
4718 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4719 | } | |
4720 | else if (nlines) | |
4721 | { | |
4722 | /* The y-position we try to reach. Note that h has been | |
4723 | subtracted in front of the if-statement. */ | |
4724 | int target_y = it->current_y + h - dy; | |
4725 | ||
4726 | /* If we did not reach target_y, try to move further backward if | |
4727 | we can. If we moved too far backward, try to move forward. */ | |
4728 | if (target_y < it->current_y | |
4729 | && IT_CHARPOS (*it) > BEGV) | |
4730 | { | |
4731 | move_it_vertically (it, target_y - it->current_y); | |
4732 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4733 | } | |
4734 | else if (target_y >= it->current_y + line_height | |
4735 | && IT_CHARPOS (*it) < ZV) | |
4736 | { | |
4737 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4738 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4739 | } | |
4740 | } | |
4741 | } | |
4742 | ||
4743 | ||
4744 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4745 | move backwards. DY = 0 means move to start of screen line. At the | |
4746 | end, IT will be on the start of a screen line. */ | |
4747 | ||
4748 | void | |
4749 | move_it_vertically (it, dy) | |
4750 | struct it *it; | |
4751 | int dy; | |
4752 | { | |
4753 | if (dy <= 0) | |
4754 | move_it_vertically_backward (it, -dy); | |
4755 | else if (dy > 0) | |
4756 | { | |
47589c8c | 4757 | TRACE_MOVE ((stderr, "move_it_v: from %d, %d\n", IT_CHARPOS (*it), dy)); |
5f5c8ee5 GM |
4758 | move_it_to (it, ZV, -1, it->current_y + dy, -1, |
4759 | MOVE_TO_POS | MOVE_TO_Y); | |
47589c8c | 4760 | TRACE_MOVE ((stderr, "move_it_v: to %d\n", IT_CHARPOS (*it))); |
5f5c8ee5 GM |
4761 | |
4762 | /* If buffer ends in ZV without a newline, move to the start of | |
4763 | the line to satisfy the post-condition. */ | |
4764 | if (IT_CHARPOS (*it) == ZV | |
4765 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4766 | move_it_by_lines (it, 0, 0); | |
4767 | } | |
4768 | } | |
4769 | ||
4770 | ||
4771 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4772 | and END_CHARPOS is invisible. IT->window is the window for text | |
4773 | property lookup. */ | |
4774 | ||
4775 | static int | |
4776 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4777 | struct it *it; | |
4778 | int start_charpos, end_charpos; | |
4779 | { | |
5f5c8ee5 GM |
4780 | Lisp_Object prop, limit; |
4781 | int invisible_found_p; | |
4782 | ||
4783 | xassert (it != NULL && start_charpos <= end_charpos); | |
4784 | ||
4785 | /* Is text at START invisible? */ | |
4786 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4787 | it->window); | |
4788 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4789 | invisible_found_p = 1; | |
4790 | else | |
4791 | { | |
016b5642 MB |
4792 | limit = Fnext_single_char_property_change (make_number (start_charpos), |
4793 | Qinvisible, Qnil, | |
4794 | make_number (end_charpos)); | |
5f5c8ee5 GM |
4795 | invisible_found_p = XFASTINT (limit) < end_charpos; |
4796 | } | |
4797 | ||
4798 | return invisible_found_p; | |
5f5c8ee5 GM |
4799 | } |
4800 | ||
4801 | ||
4802 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4803 | negative means move up. DVPOS == 0 means move to the start of the | |
4804 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4805 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4806 | ||
4807 | Further optimization ideas: If we would know that IT->f doesn't use | |
4808 | a face with proportional font, we could be faster for | |
4809 | truncate-lines nil. */ | |
4810 | ||
4811 | void | |
4812 | move_it_by_lines (it, dvpos, need_y_p) | |
4813 | struct it *it; | |
4814 | int dvpos, need_y_p; | |
4815 | { | |
4816 | struct position pos; | |
4817 | ||
4818 | if (!FRAME_WINDOW_P (it->f)) | |
4819 | { | |
4820 | struct text_pos textpos; | |
4821 | ||
4822 | /* We can use vmotion on frames without proportional fonts. */ | |
4823 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4824 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4825 | reseat (it, textpos, 1); | |
4826 | it->vpos += pos.vpos; | |
4827 | it->current_y += pos.vpos; | |
4828 | } | |
4829 | else if (dvpos == 0) | |
4830 | { | |
4831 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4832 | move_it_vertically_backward (it, 0); | |
4833 | xassert (it->current_x == 0 && it->hpos == 0); | |
4834 | } | |
4835 | else if (dvpos > 0) | |
4836 | { | |
4837 | /* If there are no continuation lines, and if there is no | |
4838 | selective display, try the simple method of moving forward | |
4839 | DVPOS newlines, then see where we are. */ | |
4840 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4841 | { | |
4842 | int shortage = 0, charpos; | |
4843 | ||
4844 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4845 | charpos = IT_CHARPOS (*it) + 1; | |
4846 | else | |
4847 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4848 | &shortage, 0); | |
4849 | ||
4850 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4851 | { | |
4852 | struct text_pos pos; | |
4853 | CHARPOS (pos) = charpos; | |
4854 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4855 | reseat (it, pos, 1); | |
4856 | it->vpos += dvpos - shortage; | |
4857 | it->hpos = it->current_x = 0; | |
4858 | return; | |
4859 | } | |
4860 | } | |
4861 | ||
4862 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4863 | } | |
4864 | else | |
4865 | { | |
4866 | struct it it2; | |
4867 | int start_charpos, i; | |
4868 | ||
4869 | /* If there are no continuation lines, and if there is no | |
4870 | selective display, try the simple method of moving backward | |
4871 | -DVPOS newlines. */ | |
4872 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4873 | { | |
4874 | int shortage; | |
4875 | int charpos = IT_CHARPOS (*it); | |
4876 | int bytepos = IT_BYTEPOS (*it); | |
4877 | ||
4878 | /* If in the middle of a line, go to its start. */ | |
4879 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4880 | { | |
4881 | charpos = find_next_newline_no_quit (charpos, -1); | |
4882 | bytepos = CHAR_TO_BYTE (charpos); | |
4883 | } | |
4884 | ||
4885 | if (charpos == BEGV) | |
4886 | { | |
4887 | struct text_pos pos; | |
4888 | CHARPOS (pos) = charpos; | |
4889 | BYTEPOS (pos) = bytepos; | |
4890 | reseat (it, pos, 1); | |
4891 | it->hpos = it->current_x = 0; | |
4892 | return; | |
4893 | } | |
4894 | else | |
4895 | { | |
4896 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4897 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4898 | { | |
4899 | struct text_pos pos; | |
4900 | CHARPOS (pos) = charpos; | |
4901 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4902 | reseat (it, pos, 1); | |
4903 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4904 | it->hpos = it->current_x = 0; | |
4905 | return; | |
4906 | } | |
4907 | } | |
4908 | } | |
4909 | ||
4910 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4911 | start_charpos = IT_CHARPOS (*it); | |
4912 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4913 | back_to_previous_visible_line_start (it); | |
4914 | reseat (it, it->current.pos, 1); | |
4915 | it->current_x = it->hpos = 0; | |
4916 | ||
4917 | /* Above call may have moved too far if continuation lines | |
4918 | are involved. Scan forward and see if it did. */ | |
4919 | it2 = *it; | |
4920 | it2.vpos = it2.current_y = 0; | |
4921 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4922 | it->vpos -= it2.vpos; | |
4923 | it->current_y -= it2.current_y; | |
4924 | it->current_x = it->hpos = 0; | |
4925 | ||
4926 | /* If we moved too far, move IT some lines forward. */ | |
4927 | if (it2.vpos > -dvpos) | |
4928 | { | |
4929 | int delta = it2.vpos + dvpos; | |
4930 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4931 | } | |
4932 | } | |
4933 | } | |
4934 | ||
4935 | ||
4936 | \f | |
4937 | /*********************************************************************** | |
4938 | Messages | |
4939 | ***********************************************************************/ | |
4940 | ||
4941 | ||
937248bc GM |
4942 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
4943 | to *Messages*. */ | |
4944 | ||
4945 | void | |
4946 | add_to_log (format, arg1, arg2) | |
4947 | char *format; | |
4948 | Lisp_Object arg1, arg2; | |
4949 | { | |
4950 | Lisp_Object args[3]; | |
4951 | Lisp_Object msg, fmt; | |
4952 | char *buffer; | |
4953 | int len; | |
4954 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4955 | ||
4956 | fmt = msg = Qnil; | |
4957 | GCPRO4 (fmt, msg, arg1, arg2); | |
4958 | ||
4959 | args[0] = fmt = build_string (format); | |
4960 | args[1] = arg1; | |
4961 | args[2] = arg2; | |
6fc556fd | 4962 | msg = Fformat (3, args); |
937248bc GM |
4963 | |
4964 | len = STRING_BYTES (XSTRING (msg)) + 1; | |
4965 | buffer = (char *) alloca (len); | |
4966 | strcpy (buffer, XSTRING (msg)->data); | |
4967 | ||
796184bc | 4968 | message_dolog (buffer, len - 1, 1, 0); |
937248bc GM |
4969 | UNGCPRO; |
4970 | } | |
4971 | ||
4972 | ||
5f5c8ee5 GM |
4973 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
4974 | ||
4975 | void | |
4976 | message_log_maybe_newline () | |
4977 | { | |
4978 | if (message_log_need_newline) | |
4979 | message_dolog ("", 0, 1, 0); | |
4980 | } | |
4981 | ||
4982 | ||
4983 | /* Add a string M of length LEN to the message log, optionally | |
4984 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4985 | nonzero, means interpret the contents of M as multibyte. This | |
4986 | function calls low-level routines in order to bypass text property | |
4987 | hooks, etc. which might not be safe to run. */ | |
4988 | ||
4989 | void | |
4990 | message_dolog (m, len, nlflag, multibyte) | |
4991 | char *m; | |
4992 | int len, nlflag, multibyte; | |
4993 | { | |
4994 | if (!NILP (Vmessage_log_max)) | |
4995 | { | |
4996 | struct buffer *oldbuf; | |
4997 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4998 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4999 | int point_at_end = 0; | |
5000 | int zv_at_end = 0; | |
5001 | Lisp_Object old_deactivate_mark, tem; | |
5002 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
5003 | ||
5004 | old_deactivate_mark = Vdeactivate_mark; | |
5005 | oldbuf = current_buffer; | |
6a94510a | 5006 | Fset_buffer (Fget_buffer_create (Vmessages_buffer_name)); |
5f5c8ee5 GM |
5007 | current_buffer->undo_list = Qt; |
5008 | ||
5009 | oldpoint = Fpoint_marker (); | |
5010 | oldbegv = Fpoint_min_marker (); | |
5011 | oldzv = Fpoint_max_marker (); | |
5012 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
5013 | ||
5014 | if (PT == Z) | |
5015 | point_at_end = 1; | |
5016 | if (ZV == Z) | |
5017 | zv_at_end = 1; | |
5018 | ||
5019 | BEGV = BEG; | |
5020 | BEGV_BYTE = BEG_BYTE; | |
5021 | ZV = Z; | |
5022 | ZV_BYTE = Z_BYTE; | |
5023 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5024 | ||
5025 | /* Insert the string--maybe converting multibyte to single byte | |
5026 | or vice versa, so that all the text fits the buffer. */ | |
5027 | if (multibyte | |
5028 | && NILP (current_buffer->enable_multibyte_characters)) | |
5029 | { | |
5030 | int i, c, nbytes; | |
5031 | unsigned char work[1]; | |
5032 | ||
5033 | /* Convert a multibyte string to single-byte | |
5034 | for the *Message* buffer. */ | |
5035 | for (i = 0; i < len; i += nbytes) | |
5036 | { | |
4fdb80f2 | 5037 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
5038 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
5039 | ? c | |
5040 | : multibyte_char_to_unibyte (c, Qnil)); | |
5041 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5042 | } | |
5043 | } | |
5044 | else if (! multibyte | |
5045 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
5046 | { | |
5047 | int i, c, nbytes; | |
5048 | unsigned char *msg = (unsigned char *) m; | |
260a86a0 | 5049 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
5050 | /* Convert a single-byte string to multibyte |
5051 | for the *Message* buffer. */ | |
5052 | for (i = 0; i < len; i++) | |
5053 | { | |
5054 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
5055 | nbytes = CHAR_STRING (c, str); |
5056 | insert_1_both (str, 1, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
5057 | } |
5058 | } | |
5059 | else if (len) | |
5060 | insert_1 (m, len, 1, 0, 0); | |
5061 | ||
5062 | if (nlflag) | |
5063 | { | |
5064 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
5065 | insert_1 ("\n", 1, 1, 0, 0); | |
5066 | ||
5067 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
5068 | this_bol = PT; | |
5069 | this_bol_byte = PT_BYTE; | |
5070 | ||
5071 | if (this_bol > BEG) | |
5072 | { | |
5073 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
5074 | prev_bol = PT; | |
5075 | prev_bol_byte = PT_BYTE; | |
5076 | ||
5077 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
5078 | this_bol, this_bol_byte); | |
5079 | if (dup) | |
5080 | { | |
5081 | del_range_both (prev_bol, prev_bol_byte, | |
5082 | this_bol, this_bol_byte, 0); | |
5083 | if (dup > 1) | |
5084 | { | |
5085 | char dupstr[40]; | |
5086 | int duplen; | |
5087 | ||
5088 | /* If you change this format, don't forget to also | |
5089 | change message_log_check_duplicate. */ | |
5090 | sprintf (dupstr, " [%d times]", dup); | |
5091 | duplen = strlen (dupstr); | |
5092 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
5093 | insert_1 (dupstr, duplen, 1, 0, 1); | |
5094 | } | |
5095 | } | |
5096 | } | |
5097 | ||
5098 | if (NATNUMP (Vmessage_log_max)) | |
5099 | { | |
5100 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
5101 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
5102 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
5103 | } | |
5104 | } | |
5105 | BEGV = XMARKER (oldbegv)->charpos; | |
5106 | BEGV_BYTE = marker_byte_position (oldbegv); | |
5107 | ||
5108 | if (zv_at_end) | |
5109 | { | |
5110 | ZV = Z; | |
5111 | ZV_BYTE = Z_BYTE; | |
5112 | } | |
5113 | else | |
5114 | { | |
5115 | ZV = XMARKER (oldzv)->charpos; | |
5116 | ZV_BYTE = marker_byte_position (oldzv); | |
5117 | } | |
5118 | ||
5119 | if (point_at_end) | |
5120 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
5121 | else | |
5122 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
5123 | Lisp code. */ | |
5124 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
5125 | XMARKER (oldpoint)->bytepos); | |
5126 | ||
5127 | UNGCPRO; | |
5128 | free_marker (oldpoint); | |
5129 | free_marker (oldbegv); | |
5130 | free_marker (oldzv); | |
5131 | ||
5132 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
5133 | set_buffer_internal (oldbuf); | |
5134 | if (NILP (tem)) | |
5135 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
5136 | message_log_need_newline = !nlflag; | |
5137 | Vdeactivate_mark = old_deactivate_mark; | |
5138 | } | |
5139 | } | |
5140 | ||
5141 | ||
5142 | /* We are at the end of the buffer after just having inserted a newline. | |
5143 | (Note: We depend on the fact we won't be crossing the gap.) | |
5144 | Check to see if the most recent message looks a lot like the previous one. | |
5145 | Return 0 if different, 1 if the new one should just replace it, or a | |
5146 | value N > 1 if we should also append " [N times]". */ | |
5147 | ||
5148 | static int | |
5149 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
5150 | int prev_bol, this_bol; | |
5151 | int prev_bol_byte, this_bol_byte; | |
5152 | { | |
5153 | int i; | |
5154 | int len = Z_BYTE - 1 - this_bol_byte; | |
5155 | int seen_dots = 0; | |
5156 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
5157 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
5158 | ||
5159 | for (i = 0; i < len; i++) | |
5160 | { | |
5161 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
5162 | && p1[i] != '\n') | |
5163 | seen_dots = 1; | |
5164 | if (p1[i] != p2[i]) | |
5165 | return seen_dots; | |
5166 | } | |
5167 | p1 += len; | |
5168 | if (*p1 == '\n') | |
5169 | return 2; | |
5170 | if (*p1++ == ' ' && *p1++ == '[') | |
5171 | { | |
5172 | int n = 0; | |
5173 | while (*p1 >= '0' && *p1 <= '9') | |
5174 | n = n * 10 + *p1++ - '0'; | |
5175 | if (strncmp (p1, " times]\n", 8) == 0) | |
5176 | return n+1; | |
5177 | } | |
5178 | return 0; | |
5179 | } | |
5180 | ||
5181 | ||
5182 | /* Display an echo area message M with a specified length of LEN | |
5183 | chars. The string may include null characters. If M is 0, clear | |
5184 | out any existing message, and let the mini-buffer text show through. | |
5185 | ||
5186 | The buffer M must continue to exist until after the echo area gets | |
5187 | cleared or some other message gets displayed there. This means do | |
5188 | not pass text that is stored in a Lisp string; do not pass text in | |
5189 | a buffer that was alloca'd. */ | |
5190 | ||
5191 | void | |
5192 | message2 (m, len, multibyte) | |
5193 | char *m; | |
5194 | int len; | |
5195 | int multibyte; | |
5196 | { | |
5197 | /* First flush out any partial line written with print. */ | |
5198 | message_log_maybe_newline (); | |
5199 | if (m) | |
5200 | message_dolog (m, len, 1, multibyte); | |
5201 | message2_nolog (m, len, multibyte); | |
5202 | } | |
5203 | ||
5204 | ||
5205 | /* The non-logging counterpart of message2. */ | |
5206 | ||
5207 | void | |
5208 | message2_nolog (m, len, multibyte) | |
5209 | char *m; | |
5210 | int len; | |
5211 | { | |
886bd6f2 | 5212 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5213 | message_enable_multibyte = multibyte; |
5214 | ||
5215 | if (noninteractive) | |
5216 | { | |
5217 | if (noninteractive_need_newline) | |
5218 | putc ('\n', stderr); | |
5219 | noninteractive_need_newline = 0; | |
5220 | if (m) | |
5221 | fwrite (m, len, 1, stderr); | |
5222 | if (cursor_in_echo_area == 0) | |
5223 | fprintf (stderr, "\n"); | |
5224 | fflush (stderr); | |
5225 | } | |
5226 | /* A null message buffer means that the frame hasn't really been | |
5227 | initialized yet. Error messages get reported properly by | |
5228 | cmd_error, so this must be just an informative message; toss it. */ | |
5229 | else if (INTERACTIVE | |
886bd6f2 GM |
5230 | && sf->glyphs_initialized_p |
5231 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5232 | { |
5233 | Lisp_Object mini_window; | |
5234 | struct frame *f; | |
5235 | ||
5236 | /* Get the frame containing the mini-buffer | |
5237 | that the selected frame is using. */ | |
886bd6f2 | 5238 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5239 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5240 | ||
5241 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5242 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
5243 | && ! FRAME_VISIBLE_P (f)) |
5244 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
5245 | ||
5246 | if (m) | |
5247 | { | |
c6e89d6c | 5248 | set_message (m, Qnil, len, multibyte); |
5f5c8ee5 GM |
5249 | if (minibuffer_auto_raise) |
5250 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
5251 | } | |
5252 | else | |
c6e89d6c | 5253 | clear_message (1, 1); |
5f5c8ee5 | 5254 | |
c6e89d6c | 5255 | do_pending_window_change (0); |
5f5c8ee5 | 5256 | echo_area_display (1); |
c6e89d6c | 5257 | do_pending_window_change (0); |
5f5c8ee5 GM |
5258 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5259 | (*frame_up_to_date_hook) (f); | |
5260 | } | |
5261 | } | |
5262 | ||
5263 | ||
c6e89d6c GM |
5264 | /* Display an echo area message M with a specified length of NBYTES |
5265 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
5266 | string, clear out any existing message, and let the mini-buffer |
5267 | text show through. */ | |
5268 | ||
5269 | void | |
c6e89d6c | 5270 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 5271 | Lisp_Object m; |
c6e89d6c | 5272 | int nbytes; |
5f5c8ee5 GM |
5273 | int multibyte; |
5274 | { | |
5275 | struct gcpro gcpro1; | |
5276 | ||
5277 | GCPRO1 (m); | |
5278 | ||
5279 | /* First flush out any partial line written with print. */ | |
5280 | message_log_maybe_newline (); | |
5281 | if (STRINGP (m)) | |
c6e89d6c GM |
5282 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
5283 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5284 | |
5285 | UNGCPRO; | |
5286 | } | |
5287 | ||
5288 | ||
5289 | /* The non-logging version of message3. */ | |
5290 | ||
5291 | void | |
c6e89d6c | 5292 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5293 | Lisp_Object m; |
c6e89d6c | 5294 | int nbytes, multibyte; |
5f5c8ee5 | 5295 | { |
886bd6f2 | 5296 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5297 | message_enable_multibyte = multibyte; |
5298 | ||
5299 | if (noninteractive) | |
5300 | { | |
5301 | if (noninteractive_need_newline) | |
5302 | putc ('\n', stderr); | |
5303 | noninteractive_need_newline = 0; | |
5304 | if (STRINGP (m)) | |
c6e89d6c | 5305 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
5306 | if (cursor_in_echo_area == 0) |
5307 | fprintf (stderr, "\n"); | |
5308 | fflush (stderr); | |
5309 | } | |
5310 | /* A null message buffer means that the frame hasn't really been | |
5311 | initialized yet. Error messages get reported properly by | |
5312 | cmd_error, so this must be just an informative message; toss it. */ | |
5313 | else if (INTERACTIVE | |
886bd6f2 GM |
5314 | && sf->glyphs_initialized_p |
5315 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5316 | { |
5317 | Lisp_Object mini_window; | |
c6e89d6c | 5318 | Lisp_Object frame; |
5f5c8ee5 GM |
5319 | struct frame *f; |
5320 | ||
5321 | /* Get the frame containing the mini-buffer | |
5322 | that the selected frame is using. */ | |
886bd6f2 | 5323 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5324 | frame = XWINDOW (mini_window)->frame; |
5325 | f = XFRAME (frame); | |
5f5c8ee5 GM |
5326 | |
5327 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5328 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
5329 | && !FRAME_VISIBLE_P (f)) |
5330 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 5331 | |
c6e89d6c | 5332 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 5333 | { |
c6e89d6c | 5334 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
5335 | if (minibuffer_auto_raise) |
5336 | Fraise_frame (frame); | |
5f5c8ee5 GM |
5337 | } |
5338 | else | |
c6e89d6c | 5339 | clear_message (1, 1); |
5f5c8ee5 | 5340 | |
c6e89d6c | 5341 | do_pending_window_change (0); |
5f5c8ee5 | 5342 | echo_area_display (1); |
c6e89d6c | 5343 | do_pending_window_change (0); |
5f5c8ee5 GM |
5344 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5345 | (*frame_up_to_date_hook) (f); | |
5346 | } | |
5347 | } | |
5348 | ||
5349 | ||
5350 | /* Display a null-terminated echo area message M. If M is 0, clear | |
5351 | out any existing message, and let the mini-buffer text show through. | |
5352 | ||
5353 | The buffer M must continue to exist until after the echo area gets | |
5354 | cleared or some other message gets displayed there. Do not pass | |
5355 | text that is stored in a Lisp string. Do not pass text in a buffer | |
5356 | that was alloca'd. */ | |
5357 | ||
5358 | void | |
5359 | message1 (m) | |
5360 | char *m; | |
5361 | { | |
5362 | message2 (m, (m ? strlen (m) : 0), 0); | |
5363 | } | |
5364 | ||
5365 | ||
5366 | /* The non-logging counterpart of message1. */ | |
5367 | ||
5368 | void | |
5369 | message1_nolog (m) | |
5370 | char *m; | |
5371 | { | |
5372 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5373 | } | |
5374 | ||
5375 | /* Display a message M which contains a single %s | |
5376 | which gets replaced with STRING. */ | |
5377 | ||
5378 | void | |
5379 | message_with_string (m, string, log) | |
5380 | char *m; | |
5381 | Lisp_Object string; | |
5382 | int log; | |
5383 | { | |
5384 | if (noninteractive) | |
5385 | { | |
5386 | if (m) | |
5387 | { | |
5388 | if (noninteractive_need_newline) | |
5389 | putc ('\n', stderr); | |
5390 | noninteractive_need_newline = 0; | |
5391 | fprintf (stderr, m, XSTRING (string)->data); | |
5392 | if (cursor_in_echo_area == 0) | |
5393 | fprintf (stderr, "\n"); | |
5394 | fflush (stderr); | |
5395 | } | |
5396 | } | |
5397 | else if (INTERACTIVE) | |
5398 | { | |
5399 | /* The frame whose minibuffer we're going to display the message on. | |
5400 | It may be larger than the selected frame, so we need | |
5401 | to use its buffer, not the selected frame's buffer. */ | |
5402 | Lisp_Object mini_window; | |
886bd6f2 | 5403 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5404 | |
5405 | /* Get the frame containing the minibuffer | |
5406 | that the selected frame is using. */ | |
886bd6f2 | 5407 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5408 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5409 | ||
5410 | /* A null message buffer means that the frame hasn't really been | |
5411 | initialized yet. Error messages get reported properly by | |
5412 | cmd_error, so this must be just an informative message; toss it. */ | |
5413 | if (FRAME_MESSAGE_BUF (f)) | |
5414 | { | |
5415 | int len; | |
5416 | char *a[1]; | |
5417 | a[0] = (char *) XSTRING (string)->data; | |
5418 | ||
5419 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5420 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5421 | ||
5422 | if (log) | |
5423 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5424 | STRING_MULTIBYTE (string)); | |
5425 | else | |
5426 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5427 | STRING_MULTIBYTE (string)); | |
5428 | ||
5429 | /* Print should start at the beginning of the message | |
5430 | buffer next time. */ | |
5431 | message_buf_print = 0; | |
5432 | } | |
5433 | } | |
5434 | } | |
5435 | ||
5436 | ||
5f5c8ee5 GM |
5437 | /* Dump an informative message to the minibuf. If M is 0, clear out |
5438 | any existing message, and let the mini-buffer text show through. */ | |
5439 | ||
5440 | /* VARARGS 1 */ | |
5441 | void | |
5442 | message (m, a1, a2, a3) | |
5443 | char *m; | |
5444 | EMACS_INT a1, a2, a3; | |
5445 | { | |
5446 | if (noninteractive) | |
5447 | { | |
5448 | if (m) | |
5449 | { | |
5450 | if (noninteractive_need_newline) | |
5451 | putc ('\n', stderr); | |
5452 | noninteractive_need_newline = 0; | |
5453 | fprintf (stderr, m, a1, a2, a3); | |
5454 | if (cursor_in_echo_area == 0) | |
5455 | fprintf (stderr, "\n"); | |
5456 | fflush (stderr); | |
5457 | } | |
5458 | } | |
5459 | else if (INTERACTIVE) | |
5460 | { | |
5461 | /* The frame whose mini-buffer we're going to display the message | |
5462 | on. It may be larger than the selected frame, so we need to | |
5463 | use its buffer, not the selected frame's buffer. */ | |
5464 | Lisp_Object mini_window; | |
886bd6f2 | 5465 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5466 | |
5467 | /* Get the frame containing the mini-buffer | |
5468 | that the selected frame is using. */ | |
886bd6f2 | 5469 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5470 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5471 | ||
5472 | /* A null message buffer means that the frame hasn't really been | |
5473 | initialized yet. Error messages get reported properly by | |
5474 | cmd_error, so this must be just an informative message; toss | |
5475 | it. */ | |
5476 | if (FRAME_MESSAGE_BUF (f)) | |
5477 | { | |
5478 | if (m) | |
5479 | { | |
5480 | int len; | |
5481 | #ifdef NO_ARG_ARRAY | |
5482 | char *a[3]; | |
5483 | a[0] = (char *) a1; | |
5484 | a[1] = (char *) a2; | |
5485 | a[2] = (char *) a3; | |
5486 | ||
5487 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5488 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5489 | #else | |
5490 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5491 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5492 | (char **) &a1); | |
5493 | #endif /* NO_ARG_ARRAY */ | |
5494 | ||
5495 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5496 | } | |
5497 | else | |
5498 | message1 (0); | |
5499 | ||
5500 | /* Print should start at the beginning of the message | |
5501 | buffer next time. */ | |
5502 | message_buf_print = 0; | |
5503 | } | |
5504 | } | |
5505 | } | |
5506 | ||
5507 | ||
5508 | /* The non-logging version of message. */ | |
5509 | ||
5510 | void | |
5511 | message_nolog (m, a1, a2, a3) | |
5512 | char *m; | |
5513 | EMACS_INT a1, a2, a3; | |
5514 | { | |
5515 | Lisp_Object old_log_max; | |
5516 | old_log_max = Vmessage_log_max; | |
5517 | Vmessage_log_max = Qnil; | |
5518 | message (m, a1, a2, a3); | |
5519 | Vmessage_log_max = old_log_max; | |
5520 | } | |
5521 | ||
5522 | ||
c6e89d6c GM |
5523 | /* Display the current message in the current mini-buffer. This is |
5524 | only called from error handlers in process.c, and is not time | |
5525 | critical. */ | |
5f5c8ee5 GM |
5526 | |
5527 | void | |
5528 | update_echo_area () | |
5529 | { | |
c6e89d6c GM |
5530 | if (!NILP (echo_area_buffer[0])) |
5531 | { | |
5532 | Lisp_Object string; | |
5533 | string = Fcurrent_message (); | |
5534 | message3 (string, XSTRING (string)->size, | |
5535 | !NILP (current_buffer->enable_multibyte_characters)); | |
5536 | } | |
5537 | } | |
5538 | ||
5539 | ||
5bcfeb49 GM |
5540 | /* Make sure echo area buffers in echo_buffers[] are life. If they |
5541 | aren't, make new ones. */ | |
5542 | ||
5543 | static void | |
5544 | ensure_echo_area_buffers () | |
5545 | { | |
5546 | int i; | |
5547 | ||
5548 | for (i = 0; i < 2; ++i) | |
5549 | if (!BUFFERP (echo_buffer[i]) | |
5550 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
5551 | { | |
5552 | char name[30]; | |
ff3d9573 GM |
5553 | Lisp_Object old_buffer; |
5554 | int j; | |
5555 | ||
5556 | old_buffer = echo_buffer[i]; | |
5bcfeb49 GM |
5557 | sprintf (name, " *Echo Area %d*", i); |
5558 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
ad4f174e | 5559 | XBUFFER (echo_buffer[i])->truncate_lines = Qnil; |
ff3d9573 GM |
5560 | |
5561 | for (j = 0; j < 2; ++j) | |
5562 | if (EQ (old_buffer, echo_area_buffer[j])) | |
5563 | echo_area_buffer[j] = echo_buffer[i]; | |
5bcfeb49 GM |
5564 | } |
5565 | } | |
5566 | ||
5567 | ||
23a96c77 | 5568 | /* Call FN with args A1..A4 with either the current or last displayed |
c6e89d6c GM |
5569 | echo_area_buffer as current buffer. |
5570 | ||
5571 | WHICH zero means use the current message buffer | |
5572 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
5573 | from echo_buffer[] and clear it. | |
5574 | ||
5575 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
5576 | suitable buffer from echo_buffer[] and clear it. | |
5577 | ||
5578 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
5579 | that the current message becomes the last displayed one, make | |
5580 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
5581 | ||
5582 | Value is what FN returns. */ | |
5583 | ||
5584 | static int | |
23a96c77 | 5585 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4) |
c6e89d6c GM |
5586 | struct window *w; |
5587 | int which; | |
23dd2d97 KR |
5588 | int (*fn) P_ ((EMACS_INT, Lisp_Object, EMACS_INT, EMACS_INT)); |
5589 | EMACS_INT a1; | |
5590 | Lisp_Object a2; | |
5591 | EMACS_INT a3, a4; | |
c6e89d6c GM |
5592 | { |
5593 | Lisp_Object buffer; | |
15e26c76 | 5594 | int this_one, the_other, clear_buffer_p, rc; |
c6e89d6c GM |
5595 | int count = specpdl_ptr - specpdl; |
5596 | ||
5597 | /* If buffers aren't life, make new ones. */ | |
5bcfeb49 | 5598 | ensure_echo_area_buffers (); |
c6e89d6c GM |
5599 | |
5600 | clear_buffer_p = 0; | |
5601 | ||
5602 | if (which == 0) | |
5603 | this_one = 0, the_other = 1; | |
5604 | else if (which > 0) | |
5605 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 5606 | else |
c6e89d6c GM |
5607 | { |
5608 | this_one = 0, the_other = 1; | |
5609 | clear_buffer_p = 1; | |
5610 | ||
5611 | /* We need a fresh one in case the current echo buffer equals | |
5612 | the one containing the last displayed echo area message. */ | |
5613 | if (!NILP (echo_area_buffer[this_one]) | |
5614 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
5615 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
5616 | } |
5617 | ||
5618 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
5619 | have one. */ | |
5620 | if (NILP (echo_area_buffer[this_one])) | |
5621 | { | |
5622 | echo_area_buffer[this_one] | |
5623 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
5624 | ? echo_buffer[the_other] | |
5625 | : echo_buffer[this_one]); | |
5626 | clear_buffer_p = 1; | |
5627 | } | |
5628 | ||
5629 | buffer = echo_area_buffer[this_one]; | |
5630 | ||
5631 | record_unwind_protect (unwind_with_echo_area_buffer, | |
5632 | with_echo_area_buffer_unwind_data (w)); | |
5633 | ||
5634 | /* Make the echo area buffer current. Note that for display | |
5635 | purposes, it is not necessary that the displayed window's buffer | |
5636 | == current_buffer, except for text property lookup. So, let's | |
5637 | only set that buffer temporarily here without doing a full | |
5638 | Fset_window_buffer. We must also change w->pointm, though, | |
5639 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
5640 | aborts. */ | |
9142dd5b | 5641 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
5642 | if (w) |
5643 | { | |
5644 | w->buffer = buffer; | |
5645 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
5646 | } | |
ad4f174e | 5647 | |
c6e89d6c GM |
5648 | current_buffer->undo_list = Qt; |
5649 | current_buffer->read_only = Qnil; | |
5650 | ||
5651 | if (clear_buffer_p && Z > BEG) | |
5652 | del_range (BEG, Z); | |
5653 | ||
5654 | xassert (BEGV >= BEG); | |
5655 | xassert (ZV <= Z && ZV >= BEGV); | |
5656 | ||
23a96c77 | 5657 | rc = fn (a1, a2, a3, a4); |
c6e89d6c GM |
5658 | |
5659 | xassert (BEGV >= BEG); | |
5660 | xassert (ZV <= Z && ZV >= BEGV); | |
5661 | ||
5662 | unbind_to (count, Qnil); | |
5663 | return rc; | |
5f5c8ee5 GM |
5664 | } |
5665 | ||
5666 | ||
c6e89d6c GM |
5667 | /* Save state that should be preserved around the call to the function |
5668 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 5669 | |
c6e89d6c GM |
5670 | static Lisp_Object |
5671 | with_echo_area_buffer_unwind_data (w) | |
5672 | struct window *w; | |
5f5c8ee5 | 5673 | { |
c6e89d6c GM |
5674 | int i = 0; |
5675 | Lisp_Object vector; | |
5f5c8ee5 | 5676 | |
c6e89d6c GM |
5677 | /* Reduce consing by keeping one vector in |
5678 | Vwith_echo_area_save_vector. */ | |
5679 | vector = Vwith_echo_area_save_vector; | |
5680 | Vwith_echo_area_save_vector = Qnil; | |
5681 | ||
5682 | if (NILP (vector)) | |
9142dd5b | 5683 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c GM |
5684 | |
5685 | XSETBUFFER (XVECTOR (vector)->contents[i], current_buffer); ++i; | |
5686 | XVECTOR (vector)->contents[i++] = Vdeactivate_mark; | |
5687 | XVECTOR (vector)->contents[i++] = make_number (windows_or_buffers_changed); | |
c6e89d6c GM |
5688 | |
5689 | if (w) | |
5690 | { | |
5691 | XSETWINDOW (XVECTOR (vector)->contents[i], w); ++i; | |
5692 | XVECTOR (vector)->contents[i++] = w->buffer; | |
5693 | XVECTOR (vector)->contents[i++] | |
5694 | = make_number (XMARKER (w->pointm)->charpos); | |
5695 | XVECTOR (vector)->contents[i++] | |
5696 | = make_number (XMARKER (w->pointm)->bytepos); | |
5697 | } | |
5698 | else | |
5699 | { | |
5700 | int end = i + 4; | |
5701 | while (i < end) | |
5702 | XVECTOR (vector)->contents[i++] = Qnil; | |
5703 | } | |
5f5c8ee5 | 5704 | |
c6e89d6c GM |
5705 | xassert (i == XVECTOR (vector)->size); |
5706 | return vector; | |
5707 | } | |
5f5c8ee5 | 5708 | |
5f5c8ee5 | 5709 | |
c6e89d6c GM |
5710 | /* Restore global state from VECTOR which was created by |
5711 | with_echo_area_buffer_unwind_data. */ | |
5712 | ||
5713 | static Lisp_Object | |
5714 | unwind_with_echo_area_buffer (vector) | |
5715 | Lisp_Object vector; | |
5716 | { | |
5717 | int i = 0; | |
5718 | ||
9142dd5b | 5719 | set_buffer_internal_1 (XBUFFER (XVECTOR (vector)->contents[i])); ++i; |
c6e89d6c GM |
5720 | Vdeactivate_mark = XVECTOR (vector)->contents[i]; ++i; |
5721 | windows_or_buffers_changed = XFASTINT (XVECTOR (vector)->contents[i]); ++i; | |
c6e89d6c GM |
5722 | |
5723 | if (WINDOWP (XVECTOR (vector)->contents[i])) | |
5724 | { | |
5725 | struct window *w; | |
5726 | Lisp_Object buffer, charpos, bytepos; | |
5727 | ||
5728 | w = XWINDOW (XVECTOR (vector)->contents[i]); ++i; | |
5729 | buffer = XVECTOR (vector)->contents[i]; ++i; | |
5730 | charpos = XVECTOR (vector)->contents[i]; ++i; | |
5731 | bytepos = XVECTOR (vector)->contents[i]; ++i; | |
5732 | ||
5733 | w->buffer = buffer; | |
5734 | set_marker_both (w->pointm, buffer, | |
5735 | XFASTINT (charpos), XFASTINT (bytepos)); | |
5736 | } | |
5737 | ||
5738 | Vwith_echo_area_save_vector = vector; | |
5739 | return Qnil; | |
5740 | } | |
5741 | ||
5742 | ||
5743 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
5744 | non-zero means we will print multibyte. */ | |
5745 | ||
5746 | void | |
5747 | setup_echo_area_for_printing (multibyte_p) | |
5748 | int multibyte_p; | |
5749 | { | |
5bcfeb49 GM |
5750 | ensure_echo_area_buffers (); |
5751 | ||
c6e89d6c GM |
5752 | if (!message_buf_print) |
5753 | { | |
5754 | /* A message has been output since the last time we printed. | |
5755 | Choose a fresh echo area buffer. */ | |
5756 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
5757 | echo_area_buffer[0] = echo_buffer[1]; | |
5758 | else | |
5759 | echo_area_buffer[0] = echo_buffer[0]; | |
5760 | ||
5761 | /* Switch to that buffer and clear it. */ | |
5762 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5763 | if (Z > BEG) | |
5764 | del_range (BEG, Z); | |
5765 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5766 | ||
5767 | /* Set up the buffer for the multibyteness we need. */ | |
5768 | if (multibyte_p | |
5769 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5770 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
5771 | ||
5772 | /* Raise the frame containing the echo area. */ | |
5773 | if (minibuffer_auto_raise) | |
5774 | { | |
886bd6f2 | 5775 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5776 | Lisp_Object mini_window; |
886bd6f2 | 5777 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5778 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
5779 | } | |
5780 | ||
8a4e3c0c | 5781 | message_log_maybe_newline (); |
c6e89d6c GM |
5782 | message_buf_print = 1; |
5783 | } | |
fa77249f GM |
5784 | else |
5785 | { | |
5786 | if (NILP (echo_area_buffer[0])) | |
5787 | { | |
5788 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
5789 | echo_area_buffer[0] = echo_buffer[1]; | |
5790 | else | |
5791 | echo_area_buffer[0] = echo_buffer[0]; | |
5792 | } | |
5793 | ||
5794 | if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
5795 | /* Someone switched buffers between print requests. */ | |
5796 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5797 | } | |
c6e89d6c GM |
5798 | } |
5799 | ||
5800 | ||
dd2eb166 GM |
5801 | /* Display an echo area message in window W. Value is non-zero if W's |
5802 | height is changed. If display_last_displayed_message_p is | |
5803 | non-zero, display the message that was last displayed, otherwise | |
5804 | display the current message. */ | |
c6e89d6c GM |
5805 | |
5806 | static int | |
5807 | display_echo_area (w) | |
5808 | struct window *w; | |
5809 | { | |
25edb08f GM |
5810 | int i, no_message_p, window_height_changed_p, count; |
5811 | ||
5812 | /* Temporarily disable garbage collections while displaying the echo | |
5813 | area. This is done because a GC can print a message itself. | |
5814 | That message would modify the echo area buffer's contents while a | |
5815 | redisplay of the buffer is going on, and seriously confuse | |
5816 | redisplay. */ | |
5817 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
5818 | |
5819 | /* If there is no message, we must call display_echo_area_1 | |
5820 | nevertheless because it resizes the window. But we will have to | |
5821 | reset the echo_area_buffer in question to nil at the end because | |
5822 | with_echo_area_buffer will sets it to an empty buffer. */ | |
5823 | i = display_last_displayed_message_p ? 1 : 0; | |
5824 | no_message_p = NILP (echo_area_buffer[i]); | |
5825 | ||
5826 | window_height_changed_p | |
5827 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
23a96c77 | 5828 | display_echo_area_1, |
23dd2d97 | 5829 | (EMACS_INT) w, Qnil, 0, 0); |
dd2eb166 GM |
5830 | |
5831 | if (no_message_p) | |
5832 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
5833 | |
5834 | unbind_to (count, Qnil); | |
dd2eb166 | 5835 | return window_height_changed_p; |
c6e89d6c GM |
5836 | } |
5837 | ||
5838 | ||
5839 | /* Helper for display_echo_area. Display the current buffer which | |
23a96c77 GM |
5840 | contains the current echo area message in window W, a mini-window, |
5841 | a pointer to which is passed in A1. A2..A4 are currently not used. | |
c6e89d6c GM |
5842 | Change the height of W so that all of the message is displayed. |
5843 | Value is non-zero if height of W was changed. */ | |
5844 | ||
5845 | static int | |
23a96c77 | 5846 | display_echo_area_1 (a1, a2, a3, a4) |
23dd2d97 KR |
5847 | EMACS_INT a1; |
5848 | Lisp_Object a2; | |
5849 | EMACS_INT a3, a4; | |
c6e89d6c | 5850 | { |
23a96c77 | 5851 | struct window *w = (struct window *) a1; |
c6e89d6c | 5852 | Lisp_Object window; |
c6e89d6c GM |
5853 | struct text_pos start; |
5854 | int window_height_changed_p = 0; | |
5855 | ||
5856 | /* Do this before displaying, so that we have a large enough glyph | |
5857 | matrix for the display. */ | |
92a90e89 | 5858 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
5859 | |
5860 | /* Display. */ | |
5861 | clear_glyph_matrix (w->desired_matrix); | |
5862 | XSETWINDOW (window, w); | |
5863 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
5864 | try_window (window, start); | |
5865 | ||
c6e89d6c GM |
5866 | return window_height_changed_p; |
5867 | } | |
5868 | ||
5869 | ||
92a90e89 GM |
5870 | /* Resize the echo area window to exactly the size needed for the |
5871 | currently displayed message, if there is one. */ | |
5872 | ||
5873 | void | |
5874 | resize_echo_area_axactly () | |
5875 | { | |
5876 | if (BUFFERP (echo_area_buffer[0]) | |
5877 | && WINDOWP (echo_area_window)) | |
5878 | { | |
5879 | struct window *w = XWINDOW (echo_area_window); | |
5880 | int resized_p; | |
5881 | ||
23a96c77 | 5882 | resized_p = with_echo_area_buffer (w, 0, resize_mini_window_1, |
23dd2d97 | 5883 | (EMACS_INT) w, Qnil, 0, 0); |
92a90e89 GM |
5884 | if (resized_p) |
5885 | { | |
5886 | ++windows_or_buffers_changed; | |
5887 | ++update_mode_lines; | |
5888 | redisplay_internal (0); | |
5889 | } | |
5890 | } | |
5891 | } | |
5892 | ||
5893 | ||
23a96c77 GM |
5894 | /* Callback function for with_echo_area_buffer, when used from |
5895 | resize_echo_area_axactly. A1 contains a pointer to the window to | |
5896 | resize, A2 to A4 are not used. Value is what resize_mini_window | |
5897 | returns. */ | |
5898 | ||
5899 | static int | |
5900 | resize_mini_window_1 (a1, a2, a3, a4) | |
23dd2d97 KR |
5901 | EMACS_INT a1; |
5902 | Lisp_Object a2; | |
5903 | EMACS_INT a3, a4; | |
23a96c77 GM |
5904 | { |
5905 | return resize_mini_window ((struct window *) a1, 1); | |
5906 | } | |
5907 | ||
5908 | ||
92a90e89 GM |
5909 | /* Resize mini-window W to fit the size of its contents. EXACT:P |
5910 | means size the window exactly to the size needed. Otherwise, it's | |
5911 | only enlarged until W's buffer is empty. Value is non-zero if | |
5912 | the window height has been changed. */ | |
c6e89d6c | 5913 | |
9472f927 | 5914 | int |
92a90e89 | 5915 | resize_mini_window (w, exact_p) |
c6e89d6c | 5916 | struct window *w; |
92a90e89 | 5917 | int exact_p; |
c6e89d6c GM |
5918 | { |
5919 | struct frame *f = XFRAME (w->frame); | |
5920 | int window_height_changed_p = 0; | |
5921 | ||
5922 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f GM |
5923 | |
5924 | /* Nil means don't try to resize. */ | |
00f6d59e GM |
5925 | if (NILP (Vmax_mini_window_height) |
5926 | || (FRAME_X_P (f) && f->output_data.x == NULL)) | |
97cafc0f | 5927 | return 0; |
c6e89d6c GM |
5928 | |
5929 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
5930 | { | |
5931 | struct it it; | |
dd2eb166 GM |
5932 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
5933 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
5934 | int height, max_height; | |
5935 | int unit = CANON_Y_UNIT (f); | |
5936 | struct text_pos start; | |
9142dd5b | 5937 | |
c6e89d6c | 5938 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 5939 | |
dd2eb166 GM |
5940 | /* Compute the max. number of lines specified by the user. */ |
5941 | if (FLOATP (Vmax_mini_window_height)) | |
5942 | max_height = XFLOATINT (Vmax_mini_window_height) * total_height; | |
5943 | else if (INTEGERP (Vmax_mini_window_height)) | |
5944 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
5945 | else |
5946 | max_height = total_height / 4; | |
dd2eb166 GM |
5947 | |
5948 | /* Correct that max. height if it's bogus. */ | |
5949 | max_height = max (1, max_height); | |
5950 | max_height = min (total_height, max_height); | |
5951 | ||
5952 | /* Find out the height of the text in the window. */ | |
ad4f174e GM |
5953 | if (it.truncate_lines_p) |
5954 | height = 1; | |
55b064bd | 5955 | else |
ad4f174e GM |
5956 | { |
5957 | last_height = 0; | |
5958 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
5959 | if (it.max_ascent == 0 && it.max_descent == 0) | |
5960 | height = it.current_y + last_height; | |
5961 | else | |
5962 | height = it.current_y + it.max_ascent + it.max_descent; | |
3c4b7685 | 5963 | height -= it.extra_line_spacing; |
ad4f174e GM |
5964 | height = (height + unit - 1) / unit; |
5965 | } | |
dd2eb166 GM |
5966 | |
5967 | /* Compute a suitable window start. */ | |
5968 | if (height > max_height) | |
5969 | { | |
5970 | height = max_height; | |
5971 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
5972 | move_it_vertically_backward (&it, (height - 1) * unit); | |
5973 | start = it.current.pos; | |
5974 | } | |
5975 | else | |
5976 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
5977 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 5978 | |
9472f927 GM |
5979 | /* Let it grow only, until we display an empty message, in which |
5980 | case the window shrinks again. */ | |
da448723 | 5981 | if (height > XFASTINT (w->height)) |
dd2eb166 | 5982 | { |
d2c48e86 | 5983 | int old_height = XFASTINT (w->height); |
da448723 GM |
5984 | freeze_window_starts (f, 1); |
5985 | grow_mini_window (w, height - XFASTINT (w->height)); | |
5986 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
5987 | } | |
5988 | else if (height < XFASTINT (w->height) | |
5989 | && (exact_p || BEGV == ZV)) | |
5990 | { | |
5991 | int old_height = XFASTINT (w->height); | |
5992 | freeze_window_starts (f, 0); | |
5993 | shrink_mini_window (w); | |
d2c48e86 | 5994 | window_height_changed_p = XFASTINT (w->height) != old_height; |
9142dd5b | 5995 | } |
c6e89d6c GM |
5996 | } |
5997 | ||
5998 | return window_height_changed_p; | |
5999 | } | |
6000 | ||
6001 | ||
6002 | /* Value is the current message, a string, or nil if there is no | |
6003 | current message. */ | |
6004 | ||
6005 | Lisp_Object | |
6006 | current_message () | |
6007 | { | |
6008 | Lisp_Object msg; | |
6009 | ||
6010 | if (NILP (echo_area_buffer[0])) | |
6011 | msg = Qnil; | |
6012 | else | |
6013 | { | |
23a96c77 | 6014 | with_echo_area_buffer (0, 0, current_message_1, |
23dd2d97 | 6015 | (EMACS_INT) &msg, Qnil, 0, 0); |
c6e89d6c GM |
6016 | if (NILP (msg)) |
6017 | echo_area_buffer[0] = Qnil; | |
6018 | } | |
6019 | ||
6020 | return msg; | |
6021 | } | |
6022 | ||
6023 | ||
6024 | static int | |
23a96c77 | 6025 | current_message_1 (a1, a2, a3, a4) |
23dd2d97 KR |
6026 | EMACS_INT a1; |
6027 | Lisp_Object a2; | |
6028 | EMACS_INT a3, a4; | |
c6e89d6c | 6029 | { |
23a96c77 GM |
6030 | Lisp_Object *msg = (Lisp_Object *) a1; |
6031 | ||
c6e89d6c GM |
6032 | if (Z > BEG) |
6033 | *msg = make_buffer_string (BEG, Z, 1); | |
6034 | else | |
6035 | *msg = Qnil; | |
6036 | return 0; | |
6037 | } | |
6038 | ||
6039 | ||
6040 | /* Push the current message on Vmessage_stack for later restauration | |
6041 | by restore_message. Value is non-zero if the current message isn't | |
6042 | empty. This is a relatively infrequent operation, so it's not | |
6043 | worth optimizing. */ | |
6044 | ||
6045 | int | |
6046 | push_message () | |
6047 | { | |
6048 | Lisp_Object msg; | |
6049 | msg = current_message (); | |
6050 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
6051 | return STRINGP (msg); | |
6052 | } | |
6053 | ||
6054 | ||
6055 | /* Restore message display from the top of Vmessage_stack. */ | |
6056 | ||
6057 | void | |
6058 | restore_message () | |
6059 | { | |
6060 | Lisp_Object msg; | |
6061 | ||
6062 | xassert (CONSP (Vmessage_stack)); | |
6063 | msg = XCAR (Vmessage_stack); | |
6064 | if (STRINGP (msg)) | |
6065 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
6066 | else | |
6067 | message3_nolog (msg, 0, 0); | |
6068 | } | |
6069 | ||
6070 | ||
6071 | /* Pop the top-most entry off Vmessage_stack. */ | |
6072 | ||
6073 | void | |
6074 | pop_message () | |
6075 | { | |
6076 | xassert (CONSP (Vmessage_stack)); | |
6077 | Vmessage_stack = XCDR (Vmessage_stack); | |
6078 | } | |
6079 | ||
6080 | ||
6081 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
6082 | exits. If the stack is not empty, we have a missing pop_message | |
6083 | somewhere. */ | |
6084 | ||
6085 | void | |
6086 | check_message_stack () | |
6087 | { | |
6088 | if (!NILP (Vmessage_stack)) | |
6089 | abort (); | |
6090 | } | |
6091 | ||
6092 | ||
6093 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
6094 | time we display it---but don't redisplay it now. */ | |
6095 | ||
6096 | void | |
6097 | truncate_echo_area (nchars) | |
6098 | int nchars; | |
6099 | { | |
6100 | if (nchars == 0) | |
6101 | echo_area_buffer[0] = Qnil; | |
6102 | /* A null message buffer means that the frame hasn't really been | |
6103 | initialized yet. Error messages get reported properly by | |
6104 | cmd_error, so this must be just an informative message; toss it. */ | |
6105 | else if (!noninteractive | |
6106 | && INTERACTIVE | |
c6e89d6c | 6107 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
6108 | { |
6109 | struct frame *sf = SELECTED_FRAME (); | |
6110 | if (FRAME_MESSAGE_BUF (sf)) | |
23dd2d97 | 6111 | with_echo_area_buffer (0, 0, truncate_message_1, nchars, Qnil, 0, 0); |
886bd6f2 | 6112 | } |
c6e89d6c GM |
6113 | } |
6114 | ||
6115 | ||
6116 | /* Helper function for truncate_echo_area. Truncate the current | |
6117 | message to at most NCHARS characters. */ | |
6118 | ||
6119 | static int | |
23a96c77 | 6120 | truncate_message_1 (nchars, a2, a3, a4) |
23dd2d97 KR |
6121 | EMACS_INT nchars; |
6122 | Lisp_Object a2; | |
6123 | EMACS_INT a3, a4; | |
c6e89d6c GM |
6124 | { |
6125 | if (BEG + nchars < Z) | |
6126 | del_range (BEG + nchars, Z); | |
6127 | if (Z == BEG) | |
6128 | echo_area_buffer[0] = Qnil; | |
6129 | return 0; | |
6130 | } | |
6131 | ||
6132 | ||
6133 | /* Set the current message to a substring of S or STRING. | |
6134 | ||
6135 | If STRING is a Lisp string, set the message to the first NBYTES | |
6136 | bytes from STRING. NBYTES zero means use the whole string. If | |
6137 | STRING is multibyte, the message will be displayed multibyte. | |
6138 | ||
6139 | If S is not null, set the message to the first LEN bytes of S. LEN | |
6140 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
6141 | multibyte. Display the message multibyte in that case. */ | |
6142 | ||
6143 | void | |
6144 | set_message (s, string, nbytes, multibyte_p) | |
6145 | char *s; | |
6146 | Lisp_Object string; | |
6147 | int nbytes; | |
6148 | { | |
6149 | message_enable_multibyte | |
6150 | = ((s && multibyte_p) | |
6151 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
6152 | ||
23a96c77 GM |
6153 | with_echo_area_buffer (0, -1, set_message_1, |
6154 | (EMACS_INT) s, string, nbytes, multibyte_p); | |
c6e89d6c GM |
6155 | message_buf_print = 0; |
6156 | } | |
6157 | ||
6158 | ||
6159 | /* Helper function for set_message. Arguments have the same meaning | |
23a96c77 GM |
6160 | as there, with A1 corresponding to S and A2 corresponding to STRING |
6161 | This function is called with the echo area buffer being | |
c6e89d6c GM |
6162 | current. */ |
6163 | ||
6164 | static int | |
23a96c77 | 6165 | set_message_1 (a1, a2, nbytes, multibyte_p) |
23dd2d97 KR |
6166 | EMACS_INT a1; |
6167 | Lisp_Object a2; | |
6168 | EMACS_INT nbytes, multibyte_p; | |
c6e89d6c | 6169 | { |
23a96c77 | 6170 | char *s = (char *) a1; |
23dd2d97 | 6171 | Lisp_Object string = a2; |
23a96c77 | 6172 | |
c6e89d6c GM |
6173 | xassert (BEG == Z); |
6174 | ||
6175 | /* Change multibyteness of the echo buffer appropriately. */ | |
6176 | if (message_enable_multibyte | |
6177 | != !NILP (current_buffer->enable_multibyte_characters)) | |
6178 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
6179 | ||
ad4f174e GM |
6180 | current_buffer->truncate_lines = message_truncate_lines ? Qt : Qnil; |
6181 | ||
c6e89d6c GM |
6182 | /* Insert new message at BEG. */ |
6183 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
6184 | ||
6185 | if (STRINGP (string)) | |
6186 | { | |
6187 | int nchars; | |
6188 | ||
6189 | if (nbytes == 0) | |
6190 | nbytes = XSTRING (string)->size_byte; | |
6191 | nchars = string_byte_to_char (string, nbytes); | |
6192 | ||
6193 | /* This function takes care of single/multibyte conversion. We | |
6194 | just have to ensure that the echo area buffer has the right | |
6195 | setting of enable_multibyte_characters. */ | |
6196 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
6197 | } | |
6198 | else if (s) | |
6199 | { | |
6200 | if (nbytes == 0) | |
6201 | nbytes = strlen (s); | |
6202 | ||
6203 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
6204 | { | |
6205 | /* Convert from multi-byte to single-byte. */ | |
6206 | int i, c, n; | |
6207 | unsigned char work[1]; | |
6208 | ||
6209 | /* Convert a multibyte string to single-byte. */ | |
6210 | for (i = 0; i < nbytes; i += n) | |
6211 | { | |
6212 | c = string_char_and_length (s + i, nbytes - i, &n); | |
6213 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
6214 | ? c | |
6215 | : multibyte_char_to_unibyte (c, Qnil)); | |
6216 | insert_1_both (work, 1, 1, 1, 0, 0); | |
6217 | } | |
6218 | } | |
6219 | else if (!multibyte_p | |
6220 | && !NILP (current_buffer->enable_multibyte_characters)) | |
6221 | { | |
6222 | /* Convert from single-byte to multi-byte. */ | |
6223 | int i, c, n; | |
6224 | unsigned char *msg = (unsigned char *) s; | |
260a86a0 | 6225 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c6e89d6c GM |
6226 | |
6227 | /* Convert a single-byte string to multibyte. */ | |
6228 | for (i = 0; i < nbytes; i++) | |
6229 | { | |
6230 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
6231 | n = CHAR_STRING (c, str); |
6232 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
6233 | } |
6234 | } | |
6235 | else | |
6236 | insert_1 (s, nbytes, 1, 0, 0); | |
6237 | } | |
6238 | ||
6239 | return 0; | |
6240 | } | |
6241 | ||
6242 | ||
6243 | /* Clear messages. CURRENT_P non-zero means clear the current | |
6244 | message. LAST_DISPLAYED_P non-zero means clear the message | |
6245 | last displayed. */ | |
6246 | ||
6247 | void | |
6248 | clear_message (current_p, last_displayed_p) | |
6249 | int current_p, last_displayed_p; | |
6250 | { | |
6251 | if (current_p) | |
6252 | echo_area_buffer[0] = Qnil; | |
6253 | ||
6254 | if (last_displayed_p) | |
6255 | echo_area_buffer[1] = Qnil; | |
6256 | ||
6257 | message_buf_print = 0; | |
6258 | } | |
6259 | ||
6260 | /* Clear garbaged frames. | |
6261 | ||
6262 | This function is used where the old redisplay called | |
6263 | redraw_garbaged_frames which in turn called redraw_frame which in | |
6264 | turn called clear_frame. The call to clear_frame was a source of | |
6265 | flickering. I believe a clear_frame is not necessary. It should | |
6266 | suffice in the new redisplay to invalidate all current matrices, | |
6267 | and ensure a complete redisplay of all windows. */ | |
6268 | ||
6269 | static void | |
6270 | clear_garbaged_frames () | |
6271 | { | |
5f5c8ee5 GM |
6272 | if (frame_garbaged) |
6273 | { | |
5f5c8ee5 GM |
6274 | Lisp_Object tail, frame; |
6275 | ||
6276 | FOR_EACH_FRAME (tail, frame) | |
6277 | { | |
6278 | struct frame *f = XFRAME (frame); | |
6279 | ||
6280 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
6281 | { | |
6282 | clear_current_matrices (f); | |
6283 | f->garbaged = 0; | |
6284 | } | |
6285 | } | |
6286 | ||
6287 | frame_garbaged = 0; | |
6288 | ++windows_or_buffers_changed; | |
6289 | } | |
c6e89d6c | 6290 | } |
5f5c8ee5 | 6291 | |
5f5c8ee5 | 6292 | |
886bd6f2 GM |
6293 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
6294 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 6295 | mini-windows height has been changed. */ |
5f5c8ee5 | 6296 | |
c6e89d6c GM |
6297 | static int |
6298 | echo_area_display (update_frame_p) | |
6299 | int update_frame_p; | |
6300 | { | |
6301 | Lisp_Object mini_window; | |
6302 | struct window *w; | |
6303 | struct frame *f; | |
6304 | int window_height_changed_p = 0; | |
886bd6f2 | 6305 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 6306 | |
886bd6f2 | 6307 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
6308 | w = XWINDOW (mini_window); |
6309 | f = XFRAME (WINDOW_FRAME (w)); | |
6310 | ||
6311 | /* Don't display if frame is invisible or not yet initialized. */ | |
6312 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
6313 | return 0; | |
5f5c8ee5 | 6314 | |
1ab3e082 | 6315 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
6316 | /* When Emacs starts, selected_frame may be a visible terminal |
6317 | frame, even if we run under a window system. If we let this | |
6318 | through, a message would be displayed on the terminal. */ | |
622e3754 GM |
6319 | if (EQ (selected_frame, Vterminal_frame) |
6320 | && !NILP (Vwindow_system)) | |
c6e89d6c | 6321 | return 0; |
1ab3e082 | 6322 | #endif /* HAVE_WINDOW_SYSTEM */ |
c6e89d6c GM |
6323 | |
6324 | /* Redraw garbaged frames. */ | |
6325 | if (frame_garbaged) | |
6326 | clear_garbaged_frames (); | |
6327 | ||
6328 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
6329 | { | |
6330 | echo_area_window = mini_window; | |
6331 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 6332 | w->must_be_updated_p = 1; |
c59c668a | 6333 | |
715e84c9 | 6334 | /* Update the display, unless called from redisplay_internal. */ |
5f5c8ee5 GM |
6335 | if (update_frame_p) |
6336 | { | |
715e84c9 | 6337 | int n = 0; |
edc68111 | 6338 | |
715e84c9 GM |
6339 | /* If the display update has been interrupted by pending |
6340 | input, update mode lines in the frame. Due to the | |
6341 | pending input, it might have been that redisplay hasn't | |
6342 | been called, so that mode lines above the echo area are | |
6343 | garbaged. This looks odd, so we prevent it here. */ | |
6344 | if (!display_completed) | |
6345 | n = redisplay_mode_lines (FRAME_ROOT_WINDOW (f), 0); | |
6346 | ||
6347 | if (window_height_changed_p) | |
c59c668a | 6348 | { |
715e84c9 | 6349 | /* Must update other windows. */ |
edc68111 | 6350 | windows_or_buffers_changed = 1; |
c59c668a GM |
6351 | redisplay_internal (0); |
6352 | } | |
715e84c9 | 6353 | else if (FRAME_WINDOW_P (f) && n == 0) |
5f5c8ee5 | 6354 | { |
edc68111 | 6355 | /* Window configuration is the same as before. |
715e84c9 GM |
6356 | Can do with a display update of the echo area, |
6357 | unless we displayed some mode lines. */ | |
5f5c8ee5 GM |
6358 | update_single_window (w, 1); |
6359 | rif->flush_display (f); | |
6360 | } | |
6361 | else | |
6362 | update_frame (f, 1, 1); | |
6363 | } | |
6364 | } | |
6365 | else if (!EQ (mini_window, selected_window)) | |
6366 | windows_or_buffers_changed++; | |
c59c668a GM |
6367 | |
6368 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
6369 | echo_area_buffer[1] = echo_area_buffer[0]; |
6370 | ||
5f5c8ee5 GM |
6371 | /* Prevent redisplay optimization in redisplay_internal by resetting |
6372 | this_line_start_pos. This is done because the mini-buffer now | |
6373 | displays the message instead of its buffer text. */ | |
6374 | if (EQ (mini_window, selected_window)) | |
6375 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
6376 | |
6377 | return window_height_changed_p; | |
5f5c8ee5 GM |
6378 | } |
6379 | ||
6380 | ||
6381 | \f | |
6382 | /*********************************************************************** | |
6383 | Frame Titles | |
6384 | ***********************************************************************/ | |
6385 | ||
6386 | ||
6387 | #ifdef HAVE_WINDOW_SYSTEM | |
6388 | ||
6389 | /* A buffer for constructing frame titles in it; allocated from the | |
6390 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
6391 | ||
6392 | static char *frame_title_buf; | |
6393 | ||
6394 | /* The buffer's end, and a current output position in it. */ | |
6395 | ||
6396 | static char *frame_title_buf_end; | |
6397 | static char *frame_title_ptr; | |
6398 | ||
6399 | ||
6400 | /* Store a single character C for the frame title in frame_title_buf. | |
6401 | Re-allocate frame_title_buf if necessary. */ | |
6402 | ||
6403 | static void | |
6404 | store_frame_title_char (c) | |
6405 | char c; | |
6406 | { | |
6407 | /* If output position has reached the end of the allocated buffer, | |
6408 | double the buffer's size. */ | |
6409 | if (frame_title_ptr == frame_title_buf_end) | |
6410 | { | |
6411 | int len = frame_title_ptr - frame_title_buf; | |
6412 | int new_size = 2 * len * sizeof *frame_title_buf; | |
6413 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
6414 | frame_title_buf_end = frame_title_buf + new_size; | |
6415 | frame_title_ptr = frame_title_buf + len; | |
6416 | } | |
6417 | ||
6418 | *frame_title_ptr++ = c; | |
6419 | } | |
6420 | ||
6421 | ||
6422 | /* Store part of a frame title in frame_title_buf, beginning at | |
6423 | frame_title_ptr. STR is the string to store. Do not copy more | |
6424 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
6425 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
6426 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
6427 | Called from display_mode_element when it is used to build a frame | |
6428 | title. */ | |
6429 | ||
6430 | static int | |
6431 | store_frame_title (str, field_width, precision) | |
6432 | unsigned char *str; | |
6433 | int field_width, precision; | |
6434 | { | |
6435 | int n = 0; | |
6436 | ||
6437 | /* Copy at most PRECISION chars from STR. */ | |
6438 | while ((precision <= 0 || n < precision) | |
6439 | && *str) | |
6440 | { | |
6441 | store_frame_title_char (*str++); | |
6442 | ++n; | |
6443 | } | |
6444 | ||
6445 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
6446 | while (field_width > 0 | |
6447 | && n < field_width) | |
6448 | { | |
6449 | store_frame_title_char (' '); | |
6450 | ++n; | |
6451 | } | |
6452 | ||
6453 | return n; | |
6454 | } | |
6455 | ||
6456 | ||
6457 | /* Set the title of FRAME, if it has changed. The title format is | |
6458 | Vicon_title_format if FRAME is iconified, otherwise it is | |
6459 | frame_title_format. */ | |
6460 | ||
6461 | static void | |
6462 | x_consider_frame_title (frame) | |
6463 | Lisp_Object frame; | |
6464 | { | |
6465 | struct frame *f = XFRAME (frame); | |
6466 | ||
6467 | if (FRAME_WINDOW_P (f) | |
6468 | || FRAME_MINIBUF_ONLY_P (f) | |
6469 | || f->explicit_name) | |
6470 | { | |
6471 | /* Do we have more than one visible frame on this X display? */ | |
6472 | Lisp_Object tail; | |
6473 | Lisp_Object fmt; | |
6474 | struct buffer *obuf; | |
6475 | int len; | |
6476 | struct it it; | |
6477 | ||
9472f927 | 6478 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6479 | { |
9472f927 | 6480 | struct frame *tf = XFRAME (XCAR (tail)); |
5f5c8ee5 GM |
6481 | |
6482 | if (tf != f | |
6483 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
6484 | && !FRAME_MINIBUF_ONLY_P (tf) | |
6485 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
6486 | break; | |
6487 | } | |
6488 | ||
6489 | /* Set global variable indicating that multiple frames exist. */ | |
6490 | multiple_frames = CONSP (tail); | |
6491 | ||
6492 | /* Switch to the buffer of selected window of the frame. Set up | |
6493 | frame_title_ptr so that display_mode_element will output into it; | |
6494 | then display the title. */ | |
6495 | obuf = current_buffer; | |
6496 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
6497 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
6498 | frame_title_ptr = frame_title_buf; | |
6499 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
6500 | NULL, DEFAULT_FACE_ID); | |
6501 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
6502 | frame_title_ptr = NULL; | |
6503 | set_buffer_internal (obuf); | |
6504 | ||
6505 | /* Set the title only if it's changed. This avoids consing in | |
6506 | the common case where it hasn't. (If it turns out that we've | |
6507 | already wasted too much time by walking through the list with | |
6508 | display_mode_element, then we might need to optimize at a | |
6509 | higher level than this.) */ | |
6510 | if (! STRINGP (f->name) | |
6511 | || STRING_BYTES (XSTRING (f->name)) != len | |
6512 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
6513 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
6514 | } | |
6515 | } | |
6516 | ||
6517 | #else /* not HAVE_WINDOW_SYSTEM */ | |
6518 | ||
6519 | #define frame_title_ptr ((char *)0) | |
6520 | #define store_frame_title(str, mincol, maxcol) 0 | |
6521 | ||
6522 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
6523 | ||
6524 | ||
6525 | ||
6526 | \f | |
6527 | /*********************************************************************** | |
6528 | Menu Bars | |
6529 | ***********************************************************************/ | |
6530 | ||
6531 | ||
6532 | /* Prepare for redisplay by updating menu-bar item lists when | |
6533 | appropriate. This can call eval. */ | |
6534 | ||
6535 | void | |
6536 | prepare_menu_bars () | |
6537 | { | |
6538 | int all_windows; | |
6539 | struct gcpro gcpro1, gcpro2; | |
6540 | struct frame *f; | |
6541 | struct frame *tooltip_frame; | |
6542 | ||
6543 | #ifdef HAVE_X_WINDOWS | |
6544 | tooltip_frame = tip_frame; | |
6545 | #else | |
6546 | tooltip_frame = NULL; | |
6547 | #endif | |
6548 | ||
6549 | /* Update all frame titles based on their buffer names, etc. We do | |
6550 | this before the menu bars so that the buffer-menu will show the | |
6551 | up-to-date frame titles. */ | |
6552 | #ifdef HAVE_WINDOW_SYSTEM | |
6553 | if (windows_or_buffers_changed || update_mode_lines) | |
6554 | { | |
6555 | Lisp_Object tail, frame; | |
6556 | ||
6557 | FOR_EACH_FRAME (tail, frame) | |
6558 | { | |
6559 | f = XFRAME (frame); | |
6560 | if (f != tooltip_frame | |
6561 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
6562 | x_consider_frame_title (frame); | |
6563 | } | |
6564 | } | |
6565 | #endif /* HAVE_WINDOW_SYSTEM */ | |
6566 | ||
6567 | /* Update the menu bar item lists, if appropriate. This has to be | |
6568 | done before any actual redisplay or generation of display lines. */ | |
6569 | all_windows = (update_mode_lines | |
6570 | || buffer_shared > 1 | |
6571 | || windows_or_buffers_changed); | |
6572 | if (all_windows) | |
6573 | { | |
6574 | Lisp_Object tail, frame; | |
6575 | int count = specpdl_ptr - specpdl; | |
6576 | ||
6577 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6578 | ||
6579 | FOR_EACH_FRAME (tail, frame) | |
6580 | { | |
6581 | f = XFRAME (frame); | |
6582 | ||
6583 | /* Ignore tooltip frame. */ | |
6584 | if (f == tooltip_frame) | |
6585 | continue; | |
6586 | ||
6587 | /* If a window on this frame changed size, report that to | |
6588 | the user and clear the size-change flag. */ | |
6589 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
6590 | { | |
6591 | Lisp_Object functions; | |
6592 | ||
6593 | /* Clear flag first in case we get an error below. */ | |
6594 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
6595 | functions = Vwindow_size_change_functions; | |
6596 | GCPRO2 (tail, functions); | |
6597 | ||
6598 | while (CONSP (functions)) | |
6599 | { | |
6600 | call1 (XCAR (functions), frame); | |
6601 | functions = XCDR (functions); | |
6602 | } | |
6603 | UNGCPRO; | |
6604 | } | |
6605 | ||
6606 | GCPRO1 (tail); | |
6607 | update_menu_bar (f, 0); | |
6608 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 6609 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
6610 | #endif |
6611 | UNGCPRO; | |
6612 | } | |
6613 | ||
6614 | unbind_to (count, Qnil); | |
6615 | } | |
6616 | else | |
6617 | { | |
886bd6f2 GM |
6618 | struct frame *sf = SELECTED_FRAME (); |
6619 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 6620 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 6621 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
6622 | #endif |
6623 | } | |
6624 | ||
6625 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
6626 | pending_menu_activation is not defined. */ | |
6627 | #ifdef USE_X_TOOLKIT | |
6628 | pending_menu_activation = 0; | |
6629 | #endif | |
6630 | } | |
6631 | ||
6632 | ||
6633 | /* Update the menu bar item list for frame F. This has to be done | |
6634 | before we start to fill in any display lines, because it can call | |
6635 | eval. | |
6636 | ||
6637 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
6638 | ||
6639 | static void | |
6640 | update_menu_bar (f, save_match_data) | |
6641 | struct frame *f; | |
6642 | int save_match_data; | |
6643 | { | |
6644 | Lisp_Object window; | |
6645 | register struct window *w; | |
6646 | ||
6647 | window = FRAME_SELECTED_WINDOW (f); | |
6648 | w = XWINDOW (window); | |
6649 | ||
6650 | if (update_mode_lines) | |
6651 | w->update_mode_line = Qt; | |
6652 | ||
6653 | if (FRAME_WINDOW_P (f) | |
6654 | ? | |
6655 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6656 | FRAME_EXTERNAL_MENU_BAR (f) | |
6657 | #else | |
6658 | FRAME_MENU_BAR_LINES (f) > 0 | |
6659 | #endif | |
6660 | : FRAME_MENU_BAR_LINES (f) > 0) | |
6661 | { | |
6662 | /* If the user has switched buffers or windows, we need to | |
6663 | recompute to reflect the new bindings. But we'll | |
6664 | recompute when update_mode_lines is set too; that means | |
6665 | that people can use force-mode-line-update to request | |
6666 | that the menu bar be recomputed. The adverse effect on | |
6667 | the rest of the redisplay algorithm is about the same as | |
6668 | windows_or_buffers_changed anyway. */ | |
6669 | if (windows_or_buffers_changed | |
6670 | || !NILP (w->update_mode_line) | |
6671 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6672 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6673 | != !NILP (w->last_had_star)) | |
6674 | || ((!NILP (Vtransient_mark_mode) | |
6675 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6676 | != !NILP (w->region_showing))) | |
6677 | { | |
6678 | struct buffer *prev = current_buffer; | |
6679 | int count = specpdl_ptr - specpdl; | |
6680 | ||
6681 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
6682 | if (save_match_data) | |
6683 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6684 | if (NILP (Voverriding_local_map_menu_flag)) | |
6685 | { | |
6686 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6687 | specbind (Qoverriding_local_map, Qnil); | |
6688 | } | |
6689 | ||
6690 | /* Run the Lucid hook. */ | |
6691 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
6692 | ||
6693 | /* If it has changed current-menubar from previous value, | |
6694 | really recompute the menu-bar from the value. */ | |
6695 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
6696 | call0 (Qrecompute_lucid_menubar); | |
6697 | ||
6698 | safe_run_hooks (Qmenu_bar_update_hook); | |
6699 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
6700 | ||
6701 | /* Redisplay the menu bar in case we changed it. */ | |
6702 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6703 | if (FRAME_WINDOW_P (f)) | |
6704 | set_frame_menubar (f, 0, 0); | |
6705 | else | |
6706 | /* On a terminal screen, the menu bar is an ordinary screen | |
6707 | line, and this makes it get updated. */ | |
6708 | w->update_mode_line = Qt; | |
6709 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6710 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
6711 | line, and this makes it get updated. */ | |
6712 | w->update_mode_line = Qt; | |
6713 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6714 | ||
6715 | unbind_to (count, Qnil); | |
6716 | set_buffer_internal_1 (prev); | |
6717 | } | |
6718 | } | |
6719 | } | |
6720 | ||
6721 | ||
6722 | \f | |
6723 | /*********************************************************************** | |
e037b9ec | 6724 | Tool-bars |
5f5c8ee5 GM |
6725 | ***********************************************************************/ |
6726 | ||
6727 | #ifdef HAVE_WINDOW_SYSTEM | |
6728 | ||
e037b9ec | 6729 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
6730 | before we start to fill in any display lines. Called from |
6731 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
6732 | and restore it here. */ | |
6733 | ||
6734 | static void | |
e037b9ec | 6735 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
6736 | struct frame *f; |
6737 | int save_match_data; | |
6738 | { | |
e037b9ec GM |
6739 | if (WINDOWP (f->tool_bar_window) |
6740 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
6741 | { |
6742 | Lisp_Object window; | |
6743 | struct window *w; | |
6744 | ||
6745 | window = FRAME_SELECTED_WINDOW (f); | |
6746 | w = XWINDOW (window); | |
6747 | ||
6748 | /* If the user has switched buffers or windows, we need to | |
6749 | recompute to reflect the new bindings. But we'll | |
6750 | recompute when update_mode_lines is set too; that means | |
6751 | that people can use force-mode-line-update to request | |
6752 | that the menu bar be recomputed. The adverse effect on | |
6753 | the rest of the redisplay algorithm is about the same as | |
6754 | windows_or_buffers_changed anyway. */ | |
6755 | if (windows_or_buffers_changed | |
6756 | || !NILP (w->update_mode_line) | |
6757 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6758 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6759 | != !NILP (w->last_had_star)) | |
6760 | || ((!NILP (Vtransient_mark_mode) | |
6761 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6762 | != !NILP (w->region_showing))) | |
6763 | { | |
6764 | struct buffer *prev = current_buffer; | |
6765 | int count = specpdl_ptr - specpdl; | |
a2889657 | 6766 | |
5f5c8ee5 GM |
6767 | /* Set current_buffer to the buffer of the selected |
6768 | window of the frame, so that we get the right local | |
6769 | keymaps. */ | |
6770 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 6771 | |
5f5c8ee5 GM |
6772 | /* Save match data, if we must. */ |
6773 | if (save_match_data) | |
6774 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6775 | ||
6776 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
6777 | if (NILP (Voverriding_local_map_menu_flag)) | |
6778 | { | |
6779 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6780 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 6781 | } |
1f40cad2 | 6782 | |
e037b9ec GM |
6783 | /* Build desired tool-bar items from keymaps. */ |
6784 | f->desired_tool_bar_items | |
6785 | = tool_bar_items (f->desired_tool_bar_items, | |
6786 | &f->n_desired_tool_bar_items); | |
5f5c8ee5 | 6787 | |
e037b9ec | 6788 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
6789 | w->update_mode_line = Qt; |
6790 | ||
6791 | unbind_to (count, Qnil); | |
6792 | set_buffer_internal_1 (prev); | |
81d478f3 | 6793 | } |
a2889657 JB |
6794 | } |
6795 | } | |
6796 | ||
6c4429a5 | 6797 | |
e037b9ec GM |
6798 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
6799 | F's desired tool-bar contents. F->desired_tool_bar_items must have | |
5f5c8ee5 GM |
6800 | been set up previously by calling prepare_menu_bars. */ |
6801 | ||
a2889657 | 6802 | static void |
e037b9ec | 6803 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 6804 | struct frame *f; |
a2889657 | 6805 | { |
5f5c8ee5 GM |
6806 | int i, size, size_needed, string_idx; |
6807 | struct gcpro gcpro1, gcpro2, gcpro3; | |
6808 | Lisp_Object image, plist, props; | |
a2889657 | 6809 | |
5f5c8ee5 GM |
6810 | image = plist = props = Qnil; |
6811 | GCPRO3 (image, plist, props); | |
a2889657 | 6812 | |
e037b9ec | 6813 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
6814 | Otherwise, make a new string. */ |
6815 | ||
6816 | /* The size of the string we might be able to reuse. */ | |
e037b9ec GM |
6817 | size = (STRINGP (f->desired_tool_bar_string) |
6818 | ? XSTRING (f->desired_tool_bar_string)->size | |
5f5c8ee5 GM |
6819 | : 0); |
6820 | ||
6821 | /* Each image in the string we build is preceded by a space, | |
6822 | and there is a space at the end. */ | |
e037b9ec | 6823 | size_needed = f->n_desired_tool_bar_items + 1; |
5f5c8ee5 | 6824 | |
e037b9ec | 6825 | /* Reuse f->desired_tool_bar_string, if possible. */ |
5f5c8ee5 | 6826 | if (size < size_needed) |
6fc556fd KR |
6827 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), |
6828 | make_number (' ')); | |
5f5c8ee5 GM |
6829 | else |
6830 | { | |
6831 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
6832 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 6833 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6834 | } |
a2889657 | 6835 | |
5f5c8ee5 | 6836 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
6837 | put a `menu_item' property on tool-bar items with a value that |
6838 | is the index of the item in F's tool-bar item vector. */ | |
5f5c8ee5 | 6839 | for (i = 0, string_idx = 0; |
e037b9ec | 6840 | i < f->n_desired_tool_bar_items; |
5f5c8ee5 | 6841 | ++i, string_idx += 1) |
a2889657 | 6842 | { |
5f5c8ee5 | 6843 | #define PROP(IDX) \ |
e037b9ec GM |
6844 | (XVECTOR (f->desired_tool_bar_items) \ |
6845 | ->contents[i * TOOL_BAR_ITEM_NSLOTS + (IDX)]) | |
5f5c8ee5 | 6846 | |
e037b9ec GM |
6847 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
6848 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
37e4e482 | 6849 | int margin, relief, idx; |
5f5c8ee5 GM |
6850 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; |
6851 | extern Lisp_Object Qlaplace; | |
6852 | ||
6853 | /* If image is a vector, choose the image according to the | |
6854 | button state. */ | |
e037b9ec | 6855 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
6856 | if (VECTORP (image)) |
6857 | { | |
5f5c8ee5 GM |
6858 | if (enabled_p) |
6859 | idx = (selected_p | |
e037b9ec GM |
6860 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
6861 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
6862 | else |
6863 | idx = (selected_p | |
e037b9ec GM |
6864 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
6865 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 | 6866 | |
37e4e482 GM |
6867 | xassert (ASIZE (image) >= idx); |
6868 | image = AREF (image, idx); | |
5f5c8ee5 | 6869 | } |
37e4e482 GM |
6870 | else |
6871 | idx = -1; | |
5f5c8ee5 GM |
6872 | |
6873 | /* Ignore invalid image specifications. */ | |
6874 | if (!valid_image_p (image)) | |
6875 | continue; | |
6876 | ||
e037b9ec | 6877 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
6878 | plist = Fcopy_sequence (XCDR (image)); |
6879 | ||
6880 | /* Compute margin and relief to draw. */ | |
e037b9ec GM |
6881 | relief = tool_bar_button_relief > 0 ? tool_bar_button_relief : 3; |
6882 | margin = relief + max (0, tool_bar_button_margin); | |
5f5c8ee5 | 6883 | |
e037b9ec | 6884 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
6885 | { |
6886 | /* Add a `:relief' property to the image spec if the item is | |
6887 | selected. */ | |
6888 | if (selected_p) | |
6889 | { | |
6890 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
6891 | margin -= relief; | |
6892 | } | |
6893 | } | |
6894 | else | |
6895 | { | |
6896 | /* If image is selected, display it pressed, i.e. with a | |
6897 | negative relief. If it's not selected, display it with a | |
6898 | raised relief. */ | |
6899 | plist = Fplist_put (plist, QCrelief, | |
6900 | (selected_p | |
6901 | ? make_number (-relief) | |
6902 | : make_number (relief))); | |
6903 | margin -= relief; | |
6904 | } | |
6905 | ||
6906 | /* Put a margin around the image. */ | |
6907 | if (margin) | |
6908 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
6909 | ||
37e4e482 GM |
6910 | /* If button is not enabled, and we don't have special images |
6911 | for the disabled state, make the image appear disabled by | |
5f5c8ee5 | 6912 | applying an appropriate algorithm to it. */ |
37e4e482 GM |
6913 | if (!enabled_p && idx < 0) |
6914 | plist = Fplist_put (plist, QCalgorithm, Qdisabled); | |
5f5c8ee5 GM |
6915 | |
6916 | /* Put a `display' text property on the string for the image to | |
6917 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 6918 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
6919 | vector. */ |
6920 | image = Fcons (Qimage, plist); | |
6921 | props = list4 (Qdisplay, image, | |
e037b9ec | 6922 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)), |
5f5c8ee5 GM |
6923 | Fadd_text_properties (make_number (string_idx), |
6924 | make_number (string_idx + 1), | |
e037b9ec | 6925 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6926 | #undef PROP |
a2889657 JB |
6927 | } |
6928 | ||
5f5c8ee5 GM |
6929 | UNGCPRO; |
6930 | } | |
6931 | ||
6932 | ||
e037b9ec | 6933 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
6934 | |
6935 | static void | |
e037b9ec | 6936 | display_tool_bar_line (it) |
5f5c8ee5 GM |
6937 | struct it *it; |
6938 | { | |
6939 | struct glyph_row *row = it->glyph_row; | |
6940 | int max_x = it->last_visible_x; | |
6941 | struct glyph *last; | |
6942 | ||
6943 | prepare_desired_row (row); | |
6944 | row->y = it->current_y; | |
6945 | ||
6946 | while (it->current_x < max_x) | |
a2889657 | 6947 | { |
5f5c8ee5 | 6948 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 6949 | |
5f5c8ee5 GM |
6950 | /* Get the next display element. */ |
6951 | if (!get_next_display_element (it)) | |
6952 | break; | |
73af359d | 6953 | |
5f5c8ee5 GM |
6954 | /* Produce glyphs. */ |
6955 | x_before = it->current_x; | |
6956 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
6957 | PRODUCE_GLYPHS (it); | |
daa37602 | 6958 | |
5f5c8ee5 GM |
6959 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
6960 | i = 0; | |
6961 | x = x_before; | |
6962 | while (i < nglyphs) | |
6963 | { | |
6964 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
6965 | ||
6966 | if (x + glyph->pixel_width > max_x) | |
6967 | { | |
6968 | /* Glyph doesn't fit on line. */ | |
6969 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
6970 | it->current_x = x; | |
6971 | goto out; | |
6972 | } | |
daa37602 | 6973 | |
5f5c8ee5 GM |
6974 | ++it->hpos; |
6975 | x += glyph->pixel_width; | |
6976 | ++i; | |
6977 | } | |
6978 | ||
6979 | /* Stop at line ends. */ | |
6980 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6981 | break; | |
6982 | ||
6983 | set_iterator_to_next (it); | |
a2889657 | 6984 | } |
a2889657 | 6985 | |
5f5c8ee5 | 6986 | out:; |
a2889657 | 6987 | |
5f5c8ee5 GM |
6988 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
6989 | extend_face_to_end_of_line (it); | |
6990 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
6991 | last->right_box_line_p = 1; | |
6992 | compute_line_metrics (it); | |
6993 | ||
e037b9ec | 6994 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
6995 | if (!row->displays_text_p) |
6996 | { | |
312246d1 GM |
6997 | row->height = row->phys_height = it->last_visible_y - row->y; |
6998 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
6999 | } |
7000 | ||
7001 | row->full_width_p = 1; | |
7002 | row->continued_p = 0; | |
7003 | row->truncated_on_left_p = 0; | |
7004 | row->truncated_on_right_p = 0; | |
7005 | ||
7006 | it->current_x = it->hpos = 0; | |
7007 | it->current_y += row->height; | |
7008 | ++it->vpos; | |
7009 | ++it->glyph_row; | |
a2889657 | 7010 | } |
96a410bc | 7011 | |
5f5c8ee5 | 7012 | |
e037b9ec | 7013 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 7014 | items of frame F visible. */ |
96a410bc | 7015 | |
d39b6696 | 7016 | static int |
e037b9ec | 7017 | tool_bar_lines_needed (f) |
5f5c8ee5 | 7018 | struct frame *f; |
d39b6696 | 7019 | { |
e037b9ec | 7020 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
7021 | struct it it; |
7022 | ||
e037b9ec GM |
7023 | /* Initialize an iterator for iteration over |
7024 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
7025 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7026 | it.first_visible_x = 0; |
7027 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 7028 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
7029 | |
7030 | while (!ITERATOR_AT_END_P (&it)) | |
7031 | { | |
7032 | it.glyph_row = w->desired_matrix->rows; | |
7033 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 7034 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
7035 | } |
7036 | ||
7037 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 7038 | } |
96a410bc | 7039 | |
5f5c8ee5 | 7040 | |
e037b9ec | 7041 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
7042 | height should be changed. */ |
7043 | ||
7044 | static int | |
e037b9ec | 7045 | redisplay_tool_bar (f) |
5f5c8ee5 | 7046 | struct frame *f; |
96a410bc | 7047 | { |
5f5c8ee5 GM |
7048 | struct window *w; |
7049 | struct it it; | |
7050 | struct glyph_row *row; | |
7051 | int change_height_p = 0; | |
7052 | ||
e037b9ec GM |
7053 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
7054 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 7055 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
7056 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
7057 | if (!WINDOWP (f->tool_bar_window) | |
7058 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
7059 | XFASTINT (w->height) == 0)) |
7060 | return 0; | |
96a410bc | 7061 | |
e037b9ec GM |
7062 | /* Set up an iterator for the tool-bar window. */ |
7063 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
7064 | it.first_visible_x = 0; |
7065 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
7066 | row = it.glyph_row; | |
3450d04c | 7067 | |
e037b9ec GM |
7068 | /* Build a string that represents the contents of the tool-bar. */ |
7069 | build_desired_tool_bar_string (f); | |
7070 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 7071 | |
e037b9ec | 7072 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 7073 | while (it.current_y < it.last_visible_y) |
e037b9ec | 7074 | display_tool_bar_line (&it); |
3450d04c | 7075 | |
e037b9ec | 7076 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
7077 | window, so don't do it. */ |
7078 | w->desired_matrix->no_scrolling_p = 1; | |
7079 | w->must_be_updated_p = 1; | |
3450d04c | 7080 | |
e037b9ec | 7081 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
7082 | { |
7083 | int nlines; | |
7084 | ||
7085 | /* If there are blank lines at the end, except for a partially | |
7086 | visible blank line at the end that is smaller than | |
e037b9ec | 7087 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
7088 | row = it.glyph_row - 1; |
7089 | if (!row->displays_text_p | |
7090 | && row->height >= CANON_Y_UNIT (f)) | |
7091 | change_height_p = 1; | |
7092 | ||
e037b9ec GM |
7093 | /* If row displays tool-bar items, but is partially visible, |
7094 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
7095 | if (row->displays_text_p |
7096 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
7097 | change_height_p = 1; | |
7098 | ||
e037b9ec | 7099 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
7100 | frame parameter. */ |
7101 | if (change_height_p | |
e037b9ec | 7102 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
7103 | nlines != XFASTINT (w->height))) |
7104 | { | |
e037b9ec | 7105 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 GM |
7106 | Lisp_Object frame; |
7107 | ||
7108 | XSETFRAME (frame, f); | |
7109 | clear_glyph_matrix (w->desired_matrix); | |
7110 | Fmodify_frame_parameters (frame, | |
e037b9ec | 7111 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
7112 | make_number (nlines)), |
7113 | Qnil)); | |
7114 | fonts_changed_p = 1; | |
7115 | } | |
7116 | } | |
3450d04c | 7117 | |
5f5c8ee5 | 7118 | return change_height_p; |
96a410bc | 7119 | } |
90adcf20 | 7120 | |
5f5c8ee5 | 7121 | |
e037b9ec GM |
7122 | /* Get information about the tool-bar item which is displayed in GLYPH |
7123 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
7124 | properties start in F->current_tool_bar_items. Value is zero if | |
7125 | GLYPH doesn't display a tool-bar item. */ | |
5f5c8ee5 GM |
7126 | |
7127 | int | |
e037b9ec | 7128 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
7129 | struct frame *f; |
7130 | struct glyph *glyph; | |
7131 | int *prop_idx; | |
90adcf20 | 7132 | { |
5f5c8ee5 GM |
7133 | Lisp_Object prop; |
7134 | int success_p; | |
7135 | ||
7136 | /* Get the text property `menu-item' at pos. The value of that | |
7137 | property is the start index of this item's properties in | |
e037b9ec | 7138 | F->current_tool_bar_items. */ |
5f5c8ee5 | 7139 | prop = Fget_text_property (make_number (glyph->charpos), |
e037b9ec | 7140 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
7141 | if (INTEGERP (prop)) |
7142 | { | |
7143 | *prop_idx = XINT (prop); | |
7144 | success_p = 1; | |
7145 | } | |
7146 | else | |
7147 | success_p = 0; | |
90adcf20 | 7148 | |
5f5c8ee5 GM |
7149 | return success_p; |
7150 | } | |
7151 | ||
7152 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 7153 | |
feb0c42f | 7154 | |
5f5c8ee5 GM |
7155 | \f |
7156 | /************************************************************************ | |
7157 | Horizontal scrolling | |
7158 | ************************************************************************/ | |
feb0c42f | 7159 | |
5f5c8ee5 GM |
7160 | static int hscroll_window_tree P_ ((Lisp_Object)); |
7161 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 7162 | |
5f5c8ee5 GM |
7163 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
7164 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
7165 | that it is not within a certain margin at the window's left and | |
7166 | right border. Value is non-zero if any window's hscroll has been | |
7167 | changed. */ | |
7168 | ||
7169 | static int | |
7170 | hscroll_window_tree (window) | |
7171 | Lisp_Object window; | |
7172 | { | |
7173 | int hscrolled_p = 0; | |
7174 | ||
7175 | while (WINDOWP (window)) | |
90adcf20 | 7176 | { |
5f5c8ee5 GM |
7177 | struct window *w = XWINDOW (window); |
7178 | ||
7179 | if (WINDOWP (w->hchild)) | |
7180 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
7181 | else if (WINDOWP (w->vchild)) | |
7182 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
7183 | else if (w->cursor.vpos >= 0) | |
7184 | { | |
7185 | int hscroll_margin, text_area_x, text_area_y; | |
7186 | int text_area_width, text_area_height; | |
92a90e89 GM |
7187 | struct glyph_row *current_cursor_row |
7188 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
7189 | struct glyph_row *desired_cursor_row | |
7190 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
7191 | struct glyph_row *cursor_row | |
7192 | = (desired_cursor_row->enabled_p | |
7193 | ? desired_cursor_row | |
7194 | : current_cursor_row); | |
a2725ab2 | 7195 | |
5f5c8ee5 GM |
7196 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
7197 | &text_area_width, &text_area_height); | |
90adcf20 | 7198 | |
5f5c8ee5 GM |
7199 | /* Scroll when cursor is inside this scroll margin. */ |
7200 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
7201 | ||
7202 | if ((XFASTINT (w->hscroll) | |
7203 | && w->cursor.x < hscroll_margin) | |
92a90e89 GM |
7204 | || (cursor_row->enabled_p |
7205 | && cursor_row->truncated_on_right_p | |
5f5c8ee5 | 7206 | && (w->cursor.x > text_area_width - hscroll_margin))) |
08b610e4 | 7207 | { |
5f5c8ee5 GM |
7208 | struct it it; |
7209 | int hscroll; | |
7210 | struct buffer *saved_current_buffer; | |
7211 | int pt; | |
7212 | ||
7213 | /* Find point in a display of infinite width. */ | |
7214 | saved_current_buffer = current_buffer; | |
7215 | current_buffer = XBUFFER (w->buffer); | |
7216 | ||
7217 | if (w == XWINDOW (selected_window)) | |
7218 | pt = BUF_PT (current_buffer); | |
7219 | else | |
08b610e4 | 7220 | { |
5f5c8ee5 GM |
7221 | pt = marker_position (w->pointm); |
7222 | pt = max (BEGV, pt); | |
7223 | pt = min (ZV, pt); | |
7224 | } | |
7225 | ||
7226 | /* Move iterator to pt starting at cursor_row->start in | |
7227 | a line with infinite width. */ | |
7228 | init_to_row_start (&it, w, cursor_row); | |
7229 | it.last_visible_x = INFINITY; | |
7230 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
7231 | current_buffer = saved_current_buffer; | |
7232 | ||
7233 | /* Center cursor in window. */ | |
7234 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
7235 | / CANON_X_UNIT (it.f)); | |
7236 | ||
7237 | /* Don't call Fset_window_hscroll if value hasn't | |
7238 | changed because it will prevent redisplay | |
7239 | optimizations. */ | |
7240 | if (XFASTINT (w->hscroll) != hscroll) | |
7241 | { | |
7242 | Fset_window_hscroll (window, make_number (hscroll)); | |
7243 | hscrolled_p = 1; | |
08b610e4 | 7244 | } |
08b610e4 | 7245 | } |
08b610e4 | 7246 | } |
a2725ab2 | 7247 | |
5f5c8ee5 | 7248 | window = w->next; |
90adcf20 | 7249 | } |
cd6dfed6 | 7250 | |
5f5c8ee5 GM |
7251 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
7252 | return hscrolled_p; | |
7253 | } | |
7254 | ||
7255 | ||
7256 | /* Set hscroll so that cursor is visible and not inside horizontal | |
7257 | scroll margins for all windows in the tree rooted at WINDOW. See | |
7258 | also hscroll_window_tree above. Value is non-zero if any window's | |
7259 | hscroll has been changed. If it has, desired matrices on the frame | |
7260 | of WINDOW are cleared. */ | |
7261 | ||
7262 | static int | |
7263 | hscroll_windows (window) | |
7264 | Lisp_Object window; | |
7265 | { | |
d475bcb8 GM |
7266 | int hscrolled_p; |
7267 | ||
7268 | if (automatic_hscrolling_p) | |
7269 | { | |
7270 | hscrolled_p = hscroll_window_tree (window); | |
7271 | if (hscrolled_p) | |
7272 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
7273 | } | |
7274 | else | |
7275 | hscrolled_p = 0; | |
5f5c8ee5 | 7276 | return hscrolled_p; |
90adcf20 | 7277 | } |
5f5c8ee5 GM |
7278 | |
7279 | ||
90adcf20 | 7280 | \f |
5f5c8ee5 GM |
7281 | /************************************************************************ |
7282 | Redisplay | |
7283 | ************************************************************************/ | |
7284 | ||
7285 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
7286 | to a non-zero value. This is sometimes handy to have in a debugger | |
7287 | session. */ | |
7288 | ||
7289 | #if GLYPH_DEBUG | |
a2889657 | 7290 | |
5f5c8ee5 GM |
7291 | /* First and last unchanged row for try_window_id. */ |
7292 | ||
7293 | int debug_first_unchanged_at_end_vpos; | |
7294 | int debug_last_unchanged_at_beg_vpos; | |
7295 | ||
7296 | /* Delta vpos and y. */ | |
7297 | ||
7298 | int debug_dvpos, debug_dy; | |
7299 | ||
7300 | /* Delta in characters and bytes for try_window_id. */ | |
7301 | ||
7302 | int debug_delta, debug_delta_bytes; | |
7303 | ||
7304 | /* Values of window_end_pos and window_end_vpos at the end of | |
7305 | try_window_id. */ | |
7306 | ||
7307 | int debug_end_pos, debug_end_vpos; | |
7308 | ||
7309 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
7310 | format string. A1...A9 are a supplement for a variable-length | |
7311 | argument list. If trace_redisplay_p is non-zero also printf the | |
7312 | resulting string to stderr. */ | |
7313 | ||
7314 | static void | |
7315 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
7316 | struct window *w; | |
7317 | char *fmt; | |
7318 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
7319 | { | |
7320 | char buffer[512]; | |
7321 | char *method = w->desired_matrix->method; | |
7322 | int len = strlen (method); | |
7323 | int size = sizeof w->desired_matrix->method; | |
7324 | int remaining = size - len - 1; | |
7325 | ||
7326 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
7327 | if (len && remaining) | |
7328 | { | |
7329 | method[len] = '|'; | |
7330 | --remaining, ++len; | |
7331 | } | |
7332 | ||
7333 | strncpy (method + len, buffer, remaining); | |
7334 | ||
7335 | if (trace_redisplay_p) | |
7336 | fprintf (stderr, "%p (%s): %s\n", | |
7337 | w, | |
7338 | ((BUFFERP (w->buffer) | |
7339 | && STRINGP (XBUFFER (w->buffer)->name)) | |
7340 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
7341 | : "no buffer"), | |
7342 | buffer); | |
7343 | } | |
a2889657 | 7344 | |
5f5c8ee5 | 7345 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 7346 | |
a2889657 | 7347 | |
5f5c8ee5 GM |
7348 | /* This counter is used to clear the face cache every once in a while |
7349 | in redisplay_internal. It is incremented for each redisplay. | |
7350 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
7351 | cleared. */ | |
0d231165 | 7352 | |
5f5c8ee5 | 7353 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
7354 | static int clear_face_cache_count; |
7355 | ||
20de20dc | 7356 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
7357 | |
7358 | static struct frame *previous_terminal_frame; | |
7359 | ||
7360 | /* Non-zero while redisplay_internal is in progress. */ | |
7361 | ||
7362 | int redisplaying_p; | |
7363 | ||
7364 | ||
7365 | /* Value is non-zero if all changes in window W, which displays | |
7366 | current_buffer, are in the text between START and END. START is a | |
7367 | buffer position, END is given as a distance from Z. Used in | |
7368 | redisplay_internal for display optimization. */ | |
7369 | ||
7370 | static INLINE int | |
7371 | text_outside_line_unchanged_p (w, start, end) | |
7372 | struct window *w; | |
7373 | int start, end; | |
7374 | { | |
7375 | int unchanged_p = 1; | |
7376 | ||
7377 | /* If text or overlays have changed, see where. */ | |
7378 | if (XFASTINT (w->last_modified) < MODIFF | |
7379 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
7380 | { | |
7381 | /* Gap in the line? */ | |
7382 | if (GPT < start || Z - GPT < end) | |
7383 | unchanged_p = 0; | |
7384 | ||
7385 | /* Changes start in front of the line, or end after it? */ | |
7386 | if (unchanged_p | |
9142dd5b GM |
7387 | && (BEG_UNCHANGED < start - 1 |
7388 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
7389 | unchanged_p = 0; |
7390 | ||
7391 | /* If selective display, can't optimize if changes start at the | |
7392 | beginning of the line. */ | |
7393 | if (unchanged_p | |
7394 | && INTEGERP (current_buffer->selective_display) | |
7395 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 7396 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 GM |
7397 | unchanged_p = 0; |
7398 | } | |
7399 | ||
7400 | return unchanged_p; | |
7401 | } | |
7402 | ||
7403 | ||
7404 | /* Do a frame update, taking possible shortcuts into account. This is | |
7405 | the main external entry point for redisplay. | |
7406 | ||
7407 | If the last redisplay displayed an echo area message and that message | |
7408 | is no longer requested, we clear the echo area or bring back the | |
7409 | mini-buffer if that is in use. */ | |
20de20dc | 7410 | |
a2889657 JB |
7411 | void |
7412 | redisplay () | |
e9874cee RS |
7413 | { |
7414 | redisplay_internal (0); | |
7415 | } | |
7416 | ||
260a86a0 KH |
7417 | /* Return 1 if point moved out of or into a composition. Otherwise |
7418 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
7419 | position. BUF and PT are the current point buffer and position. */ | |
7420 | ||
7421 | int | |
7422 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
7423 | struct buffer *prev_buf, *buf; | |
7424 | int prev_pt, pt; | |
7425 | { | |
7426 | int start, end; | |
7427 | Lisp_Object prop; | |
7428 | Lisp_Object buffer; | |
7429 | ||
7430 | XSETBUFFER (buffer, buf); | |
7431 | /* Check a composition at the last point if point moved within the | |
7432 | same buffer. */ | |
7433 | if (prev_buf == buf) | |
7434 | { | |
7435 | if (prev_pt == pt) | |
7436 | /* Point didn't move. */ | |
7437 | return 0; | |
7438 | ||
7439 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) | |
7440 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
7441 | && COMPOSITION_VALID_P (start, end, prop) | |
7442 | && start < prev_pt && end > prev_pt) | |
7443 | /* The last point was within the composition. Return 1 iff | |
7444 | point moved out of the composition. */ | |
7445 | return (pt <= start || pt >= end); | |
7446 | } | |
7447 | ||
7448 | /* Check a composition at the current point. */ | |
7449 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
7450 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
7451 | && COMPOSITION_VALID_P (start, end, prop) | |
7452 | && start < pt && end > pt); | |
7453 | } | |
5f5c8ee5 | 7454 | |
9142dd5b GM |
7455 | /* Reconsider the setting of B->clip_changed which is displayed |
7456 | in window W. */ | |
7457 | ||
7458 | static INLINE void | |
7459 | reconsider_clip_changes (w, b) | |
7460 | struct window *w; | |
7461 | struct buffer *b; | |
7462 | { | |
7463 | if (b->prevent_redisplay_optimizations_p) | |
7464 | b->clip_changed = 1; | |
7465 | else if (b->clip_changed | |
7466 | && !NILP (w->window_end_valid) | |
7467 | && w->current_matrix->buffer == b | |
7468 | && w->current_matrix->zv == BUF_ZV (b) | |
7469 | && w->current_matrix->begv == BUF_BEGV (b)) | |
7470 | b->clip_changed = 0; | |
260a86a0 KH |
7471 | |
7472 | /* If display wasn't paused, and W is not a tool bar window, see if | |
7473 | point has been moved into or out of a composition. In that case, | |
7474 | we set b->clip_changed to 1 to force updating the screen. If | |
7475 | b->clip_changed has already been set to 1, we can skip this | |
7476 | check. */ | |
7477 | if (!b->clip_changed | |
7478 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
7479 | { | |
7480 | int pt; | |
7481 | ||
7482 | if (w == XWINDOW (selected_window)) | |
7483 | pt = BUF_PT (current_buffer); | |
7484 | else | |
7485 | pt = marker_position (w->pointm); | |
7486 | ||
7487 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
6fc556fd | 7488 | || pt != XINT (w->last_point)) |
260a86a0 | 7489 | && check_point_in_composition (w->current_matrix->buffer, |
6fc556fd | 7490 | XINT (w->last_point), |
260a86a0 KH |
7491 | XBUFFER (w->buffer), pt)) |
7492 | b->clip_changed = 1; | |
7493 | } | |
9142dd5b GM |
7494 | } |
7495 | ||
7496 | ||
5f5c8ee5 GM |
7497 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
7498 | response to any user action; therefore, we should preserve the echo | |
7499 | area. (Actually, our caller does that job.) Perhaps in the future | |
7500 | avoid recentering windows if it is not necessary; currently that | |
7501 | causes some problems. */ | |
e9874cee RS |
7502 | |
7503 | static void | |
7504 | redisplay_internal (preserve_echo_area) | |
7505 | int preserve_echo_area; | |
a2889657 | 7506 | { |
5f5c8ee5 GM |
7507 | struct window *w = XWINDOW (selected_window); |
7508 | struct frame *f = XFRAME (w->frame); | |
7509 | int pause; | |
a2889657 | 7510 | int must_finish = 0; |
5f5c8ee5 | 7511 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 7512 | int number_of_visible_frames; |
28514cd9 | 7513 | int count; |
886bd6f2 | 7514 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 7515 | |
5f5c8ee5 GM |
7516 | /* Non-zero means redisplay has to consider all windows on all |
7517 | frames. Zero means, only selected_window is considered. */ | |
7518 | int consider_all_windows_p; | |
7519 | ||
7520 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
7521 | ||
7522 | /* No redisplay if running in batch mode or frame is not yet fully | |
7523 | initialized, or redisplay is explicitly turned off by setting | |
7524 | Vinhibit_redisplay. */ | |
7525 | if (noninteractive | |
7526 | || !NILP (Vinhibit_redisplay) | |
7527 | || !f->glyphs_initialized_p) | |
a2889657 JB |
7528 | return; |
7529 | ||
5f5c8ee5 GM |
7530 | /* The flag redisplay_performed_directly_p is set by |
7531 | direct_output_for_insert when it already did the whole screen | |
7532 | update necessary. */ | |
7533 | if (redisplay_performed_directly_p) | |
7534 | { | |
7535 | redisplay_performed_directly_p = 0; | |
7536 | if (!hscroll_windows (selected_window)) | |
7537 | return; | |
7538 | } | |
7539 | ||
15f0cf78 RS |
7540 | #ifdef USE_X_TOOLKIT |
7541 | if (popup_activated ()) | |
7542 | return; | |
7543 | #endif | |
7544 | ||
28514cd9 | 7545 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 7546 | if (redisplaying_p) |
735c094c KH |
7547 | return; |
7548 | ||
28514cd9 GM |
7549 | /* Record a function that resets redisplaying_p to its old value |
7550 | when we leave this function. */ | |
7551 | count = specpdl_ptr - specpdl; | |
7552 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); | |
7553 | ++redisplaying_p; | |
7554 | ||
8b32d885 | 7555 | retry: |
bd9d0f3f | 7556 | pause = 0; |
9142dd5b GM |
7557 | reconsider_clip_changes (w, current_buffer); |
7558 | ||
5f5c8ee5 GM |
7559 | /* If new fonts have been loaded that make a glyph matrix adjustment |
7560 | necessary, do it. */ | |
7561 | if (fonts_changed_p) | |
7562 | { | |
7563 | adjust_glyphs (NULL); | |
7564 | ++windows_or_buffers_changed; | |
7565 | fonts_changed_p = 0; | |
7566 | } | |
7567 | ||
886bd6f2 GM |
7568 | if (! FRAME_WINDOW_P (sf) |
7569 | && previous_terminal_frame != sf) | |
20de20dc | 7570 | { |
5f5c8ee5 GM |
7571 | /* Since frames on an ASCII terminal share the same display |
7572 | area, displaying a different frame means redisplay the whole | |
7573 | thing. */ | |
20de20dc | 7574 | windows_or_buffers_changed++; |
886bd6f2 GM |
7575 | SET_FRAME_GARBAGED (sf); |
7576 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 7577 | } |
886bd6f2 | 7578 | previous_terminal_frame = sf; |
20de20dc | 7579 | |
5f5c8ee5 GM |
7580 | /* Set the visible flags for all frames. Do this before checking |
7581 | for resized or garbaged frames; they want to know if their frames | |
7582 | are visible. See the comment in frame.h for | |
7583 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 7584 | { |
35f56f96 | 7585 | Lisp_Object tail, frame; |
d724d989 | 7586 | |
89819bdd RS |
7587 | number_of_visible_frames = 0; |
7588 | ||
35f56f96 | 7589 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 7590 | { |
5f5c8ee5 GM |
7591 | struct frame *f = XFRAME (frame); |
7592 | ||
7593 | FRAME_SAMPLE_VISIBILITY (f); | |
7594 | if (FRAME_VISIBLE_P (f)) | |
7595 | ++number_of_visible_frames; | |
7596 | clear_desired_matrices (f); | |
f82aff7c | 7597 | } |
d724d989 JB |
7598 | } |
7599 | ||
44fa5b1e | 7600 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 7601 | do_pending_window_change (1); |
a2889657 | 7602 | |
5f5c8ee5 | 7603 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 7604 | if (frame_garbaged) |
c6e89d6c | 7605 | clear_garbaged_frames (); |
a2889657 | 7606 | |
e037b9ec | 7607 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
7608 | prepare_menu_bars (); |
7609 | ||
28995e67 | 7610 | if (windows_or_buffers_changed) |
a2889657 JB |
7611 | update_mode_lines++; |
7612 | ||
538f13d4 RS |
7613 | /* Detect case that we need to write or remove a star in the mode line. */ |
7614 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
7615 | { |
7616 | w->update_mode_line = Qt; | |
7617 | if (buffer_shared > 1) | |
7618 | update_mode_lines++; | |
7619 | } | |
7620 | ||
5f5c8ee5 | 7621 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
7622 | if (!NILP (w->column_number_displayed) |
7623 | /* This alternative quickly identifies a common case | |
7624 | where no change is needed. */ | |
7625 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7626 | && XFASTINT (w->last_modified) >= MODIFF |
7627 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7628 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7629 | w->update_mode_line = Qt; | |
7630 | ||
44fa5b1e | 7631 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 7632 | |
5f5c8ee5 GM |
7633 | /* The variable buffer_shared is set in redisplay_window and |
7634 | indicates that we redisplay a buffer in different windows. See | |
7635 | there. */ | |
7636 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
7637 | |
7638 | /* If specs for an arrow have changed, do thorough redisplay | |
7639 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 7640 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 7641 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 7642 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 7643 | |
90adcf20 RS |
7644 | /* Normally the message* functions will have already displayed and |
7645 | updated the echo area, but the frame may have been trashed, or | |
7646 | the update may have been preempted, so display the echo area | |
c6e89d6c GM |
7647 | again here. Checking both message buffers captures the case that |
7648 | the echo area should be cleared. */ | |
7649 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
90adcf20 | 7650 | { |
c6e89d6c | 7651 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 7652 | must_finish = 1; |
dd2eb166 | 7653 | |
c6e89d6c GM |
7654 | if (fonts_changed_p) |
7655 | goto retry; | |
7656 | else if (window_height_changed_p) | |
7657 | { | |
7658 | consider_all_windows_p = 1; | |
7659 | ++update_mode_lines; | |
7660 | ++windows_or_buffers_changed; | |
9142dd5b GM |
7661 | |
7662 | /* If window configuration was changed, frames may have been | |
7663 | marked garbaged. Clear them or we will experience | |
7664 | surprises wrt scrolling. */ | |
7665 | if (frame_garbaged) | |
7666 | clear_garbaged_frames (); | |
c6e89d6c | 7667 | } |
90adcf20 | 7668 | } |
97a36635 | 7669 | else if (EQ (selected_window, minibuf_window) |
dd2eb166 GM |
7670 | && (current_buffer->clip_changed |
7671 | || XFASTINT (w->last_modified) < MODIFF | |
7672 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 7673 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
7674 | { |
7675 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
7676 | showing if its contents might have changed. */ |
7677 | must_finish = 1; | |
7678 | consider_all_windows_p = 1; | |
c6e89d6c | 7679 | ++windows_or_buffers_changed; |
dd2eb166 | 7680 | ++update_mode_lines; |
9142dd5b GM |
7681 | |
7682 | /* If window configuration was changed, frames may have been | |
7683 | marked garbaged. Clear them or we will experience | |
7684 | surprises wrt scrolling. */ | |
7685 | if (frame_garbaged) | |
7686 | clear_garbaged_frames (); | |
c6e89d6c GM |
7687 | } |
7688 | ||
90adcf20 | 7689 | |
5f5c8ee5 GM |
7690 | /* If showing the region, and mark has changed, we must redisplay |
7691 | the whole window. The assignment to this_line_start_pos prevents | |
7692 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
7693 | if (((!NILP (Vtransient_mark_mode) |
7694 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7695 | != !NILP (w->region_showing)) | |
82d04750 JB |
7696 | || (!NILP (w->region_showing) |
7697 | && !EQ (w->region_showing, | |
7698 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
7699 | CHARPOS (this_line_start_pos) = 0; |
7700 | ||
7701 | /* Optimize the case that only the line containing the cursor in the | |
7702 | selected window has changed. Variables starting with this_ are | |
7703 | set in display_line and record information about the line | |
7704 | containing the cursor. */ | |
7705 | tlbufpos = this_line_start_pos; | |
7706 | tlendpos = this_line_end_pos; | |
7707 | if (!consider_all_windows_p | |
7708 | && CHARPOS (tlbufpos) > 0 | |
7709 | && NILP (w->update_mode_line) | |
73af359d | 7710 | && !current_buffer->clip_changed |
44fa5b1e | 7711 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 7712 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 7713 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
7714 | && this_line_buffer == current_buffer |
7715 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 7716 | && NILP (w->force_start) |
5f5c8ee5 GM |
7717 | /* Point must be on the line that we have info recorded about. */ |
7718 | && PT >= CHARPOS (tlbufpos) | |
7719 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
7720 | /* All text outside that line, including its final newline, |
7721 | must be unchanged */ | |
5f5c8ee5 GM |
7722 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
7723 | CHARPOS (tlendpos))) | |
7724 | { | |
7725 | if (CHARPOS (tlbufpos) > BEGV | |
7726 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
7727 | && (CHARPOS (tlbufpos) == ZV | |
7728 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
7729 | /* Former continuation line has disappeared by becoming empty */ |
7730 | goto cancel; | |
7731 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 7732 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
7733 | || MINI_WINDOW_P (w)) |
7734 | { | |
1c9241f5 KH |
7735 | /* We have to handle the case of continuation around a |
7736 | wide-column character (See the comment in indent.c around | |
7737 | line 885). | |
7738 | ||
7739 | For instance, in the following case: | |
7740 | ||
7741 | -------- Insert -------- | |
7742 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
7743 | J_I_ ==> J_I_ `^^' are cursors. | |
7744 | ^^ ^^ | |
7745 | -------- -------- | |
7746 | ||
7747 | As we have to redraw the line above, we should goto cancel. */ | |
7748 | ||
5f5c8ee5 GM |
7749 | struct it it; |
7750 | int line_height_before = this_line_pixel_height; | |
7751 | ||
7752 | /* Note that start_display will handle the case that the | |
7753 | line starting at tlbufpos is a continuation lines. */ | |
7754 | start_display (&it, w, tlbufpos); | |
7755 | ||
7756 | /* Implementation note: It this still necessary? */ | |
7757 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
7758 | goto cancel; |
7759 | ||
5f5c8ee5 GM |
7760 | TRACE ((stderr, "trying display optimization 1\n")); |
7761 | w->cursor.vpos = -1; | |
a2889657 | 7762 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
7763 | it.vpos = this_line_vpos; |
7764 | it.current_y = this_line_y; | |
7765 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
7766 | display_line (&it); | |
7767 | ||
a2889657 | 7768 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
7769 | and ends at same distance from eob as before, we win */ |
7770 | if (w->cursor.vpos >= 0 | |
7771 | /* Line is not continued, otherwise this_line_start_pos | |
7772 | would have been set to 0 in display_line. */ | |
7773 | && CHARPOS (this_line_start_pos) | |
7774 | /* Line ends as before. */ | |
7775 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
7776 | /* Line has same height as before. Otherwise other lines | |
7777 | would have to be shifted up or down. */ | |
7778 | && this_line_pixel_height == line_height_before) | |
a2889657 | 7779 | { |
5f5c8ee5 GM |
7780 | /* If this is not the window's last line, we must adjust |
7781 | the charstarts of the lines below. */ | |
7782 | if (it.current_y < it.last_visible_y) | |
7783 | { | |
7784 | struct glyph_row *row | |
7785 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
7786 | int delta, delta_bytes; | |
7787 | ||
7788 | if (Z - CHARPOS (tlendpos) == ZV) | |
7789 | { | |
7790 | /* This line ends at end of (accessible part of) | |
7791 | buffer. There is no newline to count. */ | |
7792 | delta = (Z | |
7793 | - CHARPOS (tlendpos) | |
7794 | - MATRIX_ROW_START_CHARPOS (row)); | |
7795 | delta_bytes = (Z_BYTE | |
7796 | - BYTEPOS (tlendpos) | |
7797 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7798 | } | |
7799 | else | |
7800 | { | |
7801 | /* This line ends in a newline. Must take | |
7802 | account of the newline and the rest of the | |
7803 | text that follows. */ | |
7804 | delta = (Z | |
7805 | - CHARPOS (tlendpos) | |
7806 | - MATRIX_ROW_START_CHARPOS (row)); | |
7807 | delta_bytes = (Z_BYTE | |
7808 | - BYTEPOS (tlendpos) | |
7809 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7810 | } | |
7811 | ||
f2d86d7a GM |
7812 | increment_matrix_positions (w->current_matrix, |
7813 | this_line_vpos + 1, | |
7814 | w->current_matrix->nrows, | |
7815 | delta, delta_bytes); | |
85bcef6c | 7816 | } |
46db8486 | 7817 | |
5f5c8ee5 GM |
7818 | /* If this row displays text now but previously didn't, |
7819 | or vice versa, w->window_end_vpos may have to be | |
7820 | adjusted. */ | |
7821 | if ((it.glyph_row - 1)->displays_text_p) | |
7822 | { | |
7823 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
7824 | XSETINT (w->window_end_vpos, this_line_vpos); | |
7825 | } | |
7826 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
7827 | && this_line_vpos > 0) | |
7828 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
7829 | w->window_end_valid = Qnil; | |
7830 | ||
7831 | /* Update hint: No need to try to scroll in update_window. */ | |
7832 | w->desired_matrix->no_scrolling_p = 1; | |
7833 | ||
7834 | #if GLYPH_DEBUG | |
7835 | *w->desired_matrix->method = 0; | |
7836 | debug_method_add (w, "optimization 1"); | |
7837 | #endif | |
a2889657 JB |
7838 | goto update; |
7839 | } | |
7840 | else | |
7841 | goto cancel; | |
7842 | } | |
5f5c8ee5 GM |
7843 | else if (/* Cursor position hasn't changed. */ |
7844 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
7845 | /* Make sure the cursor was last displayed |
7846 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
7847 | && 0 <= w->cursor.vpos |
7848 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
7849 | { |
7850 | if (!must_finish) | |
7851 | { | |
c6e89d6c | 7852 | do_pending_window_change (1); |
5f5c8ee5 GM |
7853 | |
7854 | /* We used to always goto end_of_redisplay here, but this | |
7855 | isn't enough if we have a blinking cursor. */ | |
7856 | if (w->cursor_off_p == w->last_cursor_off_p) | |
7857 | goto end_of_redisplay; | |
a2889657 JB |
7858 | } |
7859 | goto update; | |
7860 | } | |
8b51f1e3 KH |
7861 | /* If highlighting the region, or if the cursor is in the echo area, |
7862 | then we can't just move the cursor. */ | |
bd66d1ba RS |
7863 | else if (! (!NILP (Vtransient_mark_mode) |
7864 | && !NILP (current_buffer->mark_active)) | |
97a36635 | 7865 | && (EQ (selected_window, current_buffer->last_selected_window) |
293a54ce | 7866 | || highlight_nonselected_windows) |
8b51f1e3 | 7867 | && NILP (w->region_showing) |
8f897821 | 7868 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 7869 | && !cursor_in_echo_area) |
a2889657 | 7870 | { |
5f5c8ee5 GM |
7871 | struct it it; |
7872 | struct glyph_row *row; | |
7873 | ||
7874 | /* Skip from tlbufpos to PT and see where it is. Note that | |
7875 | PT may be in invisible text. If so, we will end at the | |
7876 | next visible position. */ | |
7877 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
7878 | NULL, DEFAULT_FACE_ID); | |
7879 | it.current_x = this_line_start_x; | |
7880 | it.current_y = this_line_y; | |
7881 | it.vpos = this_line_vpos; | |
7882 | ||
7883 | /* The call to move_it_to stops in front of PT, but | |
7884 | moves over before-strings. */ | |
7885 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
7886 | ||
7887 | if (it.vpos == this_line_vpos | |
7888 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
7889 | row->enabled_p)) | |
a2889657 | 7890 | { |
5f5c8ee5 GM |
7891 | xassert (this_line_vpos == it.vpos); |
7892 | xassert (this_line_y == it.current_y); | |
7893 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
7894 | goto update; |
7895 | } | |
7896 | else | |
7897 | goto cancel; | |
7898 | } | |
5f5c8ee5 | 7899 | |
a2889657 | 7900 | cancel: |
5f5c8ee5 GM |
7901 | /* Text changed drastically or point moved off of line. */ |
7902 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
7903 | } |
7904 | ||
5f5c8ee5 GM |
7905 | CHARPOS (this_line_start_pos) = 0; |
7906 | consider_all_windows_p |= buffer_shared > 1; | |
7907 | ++clear_face_cache_count; | |
a2889657 | 7908 | |
5f5c8ee5 | 7909 | |
bd9d0f3f GM |
7910 | /* Build desired matrices, and update the display. If |
7911 | consider_all_windows_p is non-zero, do it for all windows on all | |
7912 | frames. Otherwise do it for selected_window, only. */ | |
463f6b91 | 7913 | |
5f5c8ee5 | 7914 | if (consider_all_windows_p) |
a2889657 | 7915 | { |
35f56f96 | 7916 | Lisp_Object tail, frame; |
a2889657 | 7917 | |
5f5c8ee5 GM |
7918 | /* Clear the face cache eventually. */ |
7919 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 7920 | { |
5f5c8ee5 | 7921 | clear_face_cache (0); |
463f6b91 RS |
7922 | clear_face_cache_count = 0; |
7923 | } | |
31b24551 | 7924 | |
5f5c8ee5 GM |
7925 | /* Recompute # windows showing selected buffer. This will be |
7926 | incremented each time such a window is displayed. */ | |
a2889657 JB |
7927 | buffer_shared = 0; |
7928 | ||
35f56f96 | 7929 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 7930 | { |
5f5c8ee5 | 7931 | struct frame *f = XFRAME (frame); |
bd9d0f3f | 7932 | |
886bd6f2 | 7933 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 7934 | { |
5f5c8ee5 GM |
7935 | /* Mark all the scroll bars to be removed; we'll redeem |
7936 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
7937 | if (condemn_scroll_bars_hook) |
7938 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 7939 | |
f21ef775 | 7940 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 7941 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 7942 | |
5f5c8ee5 GM |
7943 | /* Any scroll bars which redisplay_windows should have |
7944 | nuked should now go away. */ | |
9769686d RS |
7945 | if (judge_scroll_bars_hook) |
7946 | (*judge_scroll_bars_hook) (f); | |
bd9d0f3f GM |
7947 | |
7948 | /* If fonts changed, display again. */ | |
7949 | if (fonts_changed_p) | |
7950 | goto retry; | |
7951 | ||
7952 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) | |
7953 | { | |
7954 | /* See if we have to hscroll. */ | |
7955 | if (hscroll_windows (f->root_window)) | |
7956 | goto retry; | |
7957 | ||
7958 | /* Prevent various kinds of signals during display | |
7959 | update. stdio is not robust about handling | |
7960 | signals, which can cause an apparent I/O | |
7961 | error. */ | |
7962 | if (interrupt_input) | |
7963 | unrequest_sigio (); | |
7964 | stop_polling (); | |
7965 | ||
7966 | /* Update the display. */ | |
7967 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
7968 | pause |= update_frame (f, 0, 0); | |
7969 | if (pause) | |
7970 | break; | |
7971 | ||
7972 | mark_window_display_accurate (f->root_window, 1); | |
7973 | if (frame_up_to_date_hook) | |
7974 | frame_up_to_date_hook (f); | |
7975 | } | |
9769686d | 7976 | } |
30c566e4 | 7977 | } |
a2889657 | 7978 | } |
bd9d0f3f GM |
7979 | else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
7980 | { | |
7981 | Lisp_Object mini_window; | |
7982 | struct frame *mini_frame; | |
5f5c8ee5 | 7983 | |
bd9d0f3f | 7984 | redisplay_window (selected_window, 1); |
5f5c8ee5 | 7985 | |
bd9d0f3f GM |
7986 | /* Compare desired and current matrices, perform output. */ |
7987 | update: | |
5f5c8ee5 | 7988 | |
bd9d0f3f GM |
7989 | /* If fonts changed, display again. */ |
7990 | if (fonts_changed_p) | |
92a90e89 | 7991 | goto retry; |
a2889657 | 7992 | |
bd9d0f3f GM |
7993 | /* Prevent various kinds of signals during display update. |
7994 | stdio is not robust about handling signals, | |
7995 | which can cause an apparent I/O error. */ | |
7996 | if (interrupt_input) | |
7997 | unrequest_sigio (); | |
7998 | stop_polling (); | |
1af9f229 | 7999 | |
bd9d0f3f | 8000 | if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf)) |
5f5c8ee5 | 8001 | { |
92a90e89 GM |
8002 | if (hscroll_windows (selected_window)) |
8003 | goto retry; | |
8004 | ||
5f5c8ee5 | 8005 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 8006 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 8007 | } |
d724d989 | 8008 | |
8de2d90b | 8009 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
8010 | function. If the echo area is on another frame, that may |
8011 | have put text on a frame other than the selected one, so the | |
8012 | above call to update_frame would not have caught it. Catch | |
8de2d90b | 8013 | it here. */ |
bd9d0f3f GM |
8014 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
8015 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); | |
8de2d90b | 8016 | |
bd9d0f3f GM |
8017 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
8018 | { | |
8019 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
8020 | pause |= update_frame (mini_frame, 0, 0); | |
8021 | if (!pause && hscroll_windows (mini_window)) | |
8022 | goto retry; | |
8023 | } | |
6e8290aa | 8024 | } |
a2889657 | 8025 | |
5f5c8ee5 GM |
8026 | /* If display was paused because of pending input, make sure we do a |
8027 | thorough update the next time. */ | |
a2889657 JB |
8028 | if (pause) |
8029 | { | |
5f5c8ee5 GM |
8030 | /* Prevent the optimization at the beginning of |
8031 | redisplay_internal that tries a single-line update of the | |
8032 | line containing the cursor in the selected window. */ | |
8033 | CHARPOS (this_line_start_pos) = 0; | |
8034 | ||
8035 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 8036 | if (!NILP (last_arrow_position)) |
a2889657 JB |
8037 | { |
8038 | last_arrow_position = Qt; | |
8039 | last_arrow_string = Qt; | |
8040 | } | |
5f5c8ee5 GM |
8041 | |
8042 | /* If we pause after scrolling, some rows in the current | |
8043 | matrices of some windows are not valid. */ | |
8044 | if (!WINDOW_FULL_WIDTH_P (w) | |
8045 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
8046 | update_mode_lines = 1; |
8047 | } | |
8048 | ||
5f5c8ee5 GM |
8049 | /* Now text on frame agrees with windows, so put info into the |
8050 | windows for partial redisplay to follow. */ | |
a2889657 JB |
8051 | if (!pause) |
8052 | { | |
8053 | register struct buffer *b = XBUFFER (w->buffer); | |
8054 | ||
9142dd5b GM |
8055 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); |
8056 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
8057 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
8058 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
a2889657 | 8059 | |
5f5c8ee5 | 8060 | if (consider_all_windows_p) |
886bd6f2 | 8061 | mark_window_display_accurate (FRAME_ROOT_WINDOW (sf), 1); |
a2889657 JB |
8062 | else |
8063 | { | |
5f5c8ee5 GM |
8064 | XSETFASTINT (w->last_point, BUF_PT (b)); |
8065 | w->last_cursor = w->cursor; | |
8066 | w->last_cursor_off_p = w->cursor_off_p; | |
8067 | ||
28995e67 | 8068 | b->clip_changed = 0; |
9142dd5b | 8069 | b->prevent_redisplay_optimizations_p = 0; |
a2889657 | 8070 | w->update_mode_line = Qnil; |
c2213350 | 8071 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 8072 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
8073 | w->last_had_star |
8074 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
8075 | ? Qt : Qnil); | |
3ee4159a RS |
8076 | |
8077 | /* Record if we are showing a region, so can make sure to | |
8078 | update it fully at next redisplay. */ | |
8079 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
97a36635 GM |
8080 | && (EQ (selected_window, |
8081 | current_buffer->last_selected_window) | |
293a54ce | 8082 | || highlight_nonselected_windows) |
3ee4159a RS |
8083 | && !NILP (XBUFFER (w->buffer)->mark_active) |
8084 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
8085 | : Qnil); | |
8086 | ||
d2f84654 | 8087 | w->window_end_valid = w->buffer; |
d45de95b | 8088 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 8089 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 | 8090 | if (frame_up_to_date_hook != 0) |
886bd6f2 | 8091 | (*frame_up_to_date_hook) (sf); |
9142dd5b GM |
8092 | |
8093 | w->current_matrix->buffer = b; | |
8094 | w->current_matrix->begv = BUF_BEGV (b); | |
8095 | w->current_matrix->zv = BUF_ZV (b); | |
a2889657 | 8096 | } |
15e26c76 | 8097 | |
a2889657 JB |
8098 | update_mode_lines = 0; |
8099 | windows_or_buffers_changed = 0; | |
8100 | } | |
8101 | ||
5f5c8ee5 GM |
8102 | /* Start SIGIO interrupts coming again. Having them off during the |
8103 | code above makes it less likely one will discard output, but not | |
8104 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 8105 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
8106 | if (interrupt_input) |
8107 | request_sigio (); | |
8108 | start_polling (); | |
8109 | ||
5f5c8ee5 GM |
8110 | /* If a frame has become visible which was not before, redisplay |
8111 | again, so that we display it. Expose events for such a frame | |
8112 | (which it gets when becoming visible) don't call the parts of | |
8113 | redisplay constructing glyphs, so simply exposing a frame won't | |
8114 | display anything in this case. So, we have to display these | |
8115 | frames here explicitly. */ | |
11c52c4f RS |
8116 | if (!pause) |
8117 | { | |
8118 | Lisp_Object tail, frame; | |
8119 | int new_count = 0; | |
8120 | ||
8121 | FOR_EACH_FRAME (tail, frame) | |
8122 | { | |
8123 | int this_is_visible = 0; | |
8e83f802 RS |
8124 | |
8125 | if (XFRAME (frame)->visible) | |
8126 | this_is_visible = 1; | |
8127 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
8128 | if (XFRAME (frame)->visible) | |
8129 | this_is_visible = 1; | |
11c52c4f RS |
8130 | |
8131 | if (this_is_visible) | |
8132 | new_count++; | |
8133 | } | |
8134 | ||
89819bdd | 8135 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
8136 | windows_or_buffers_changed++; |
8137 | } | |
8138 | ||
44fa5b1e | 8139 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 8140 | do_pending_window_change (1); |
d8e242fd | 8141 | |
8b32d885 RS |
8142 | /* If we just did a pending size change, or have additional |
8143 | visible frames, redisplay again. */ | |
3c8c72e0 | 8144 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 8145 | goto retry; |
5f5c8ee5 GM |
8146 | |
8147 | end_of_redisplay:; | |
c6e89d6c | 8148 | |
28514cd9 | 8149 | unbind_to (count, Qnil); |
a2889657 JB |
8150 | } |
8151 | ||
5f5c8ee5 GM |
8152 | |
8153 | /* Redisplay, but leave alone any recent echo area message unless | |
8154 | another message has been requested in its place. | |
a2889657 JB |
8155 | |
8156 | This is useful in situations where you need to redisplay but no | |
8157 | user action has occurred, making it inappropriate for the message | |
8158 | area to be cleared. See tracking_off and | |
8159 | wait_reading_process_input for examples of these situations. */ | |
8160 | ||
8991bb31 | 8161 | void |
a2889657 JB |
8162 | redisplay_preserve_echo_area () |
8163 | { | |
c6e89d6c | 8164 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 8165 | { |
c6e89d6c GM |
8166 | /* We have a previously displayed message, but no current |
8167 | message. Redisplay the previous message. */ | |
8168 | display_last_displayed_message_p = 1; | |
e9874cee | 8169 | redisplay_internal (1); |
c6e89d6c | 8170 | display_last_displayed_message_p = 0; |
a2889657 JB |
8171 | } |
8172 | else | |
e9874cee | 8173 | redisplay_internal (1); |
a2889657 JB |
8174 | } |
8175 | ||
5f5c8ee5 | 8176 | |
28514cd9 GM |
8177 | /* Function registered with record_unwind_protect in |
8178 | redisplay_internal. Clears the flag indicating that a redisplay is | |
8179 | in progress. */ | |
8180 | ||
8181 | static Lisp_Object | |
8182 | unwind_redisplay (old_redisplaying_p) | |
8183 | Lisp_Object old_redisplaying_p; | |
8184 | { | |
8185 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 8186 | return Qnil; |
28514cd9 GM |
8187 | } |
8188 | ||
8189 | ||
5f5c8ee5 GM |
8190 | /* Mark the display of windows in the window tree rooted at WINDOW as |
8191 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
8192 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
8193 | the next time redisplay_internal is called. */ | |
8194 | ||
a2889657 | 8195 | void |
5f5c8ee5 | 8196 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 8197 | Lisp_Object window; |
5f5c8ee5 | 8198 | int accurate_p; |
a2889657 | 8199 | { |
5f5c8ee5 GM |
8200 | struct window *w; |
8201 | ||
8202 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
8203 | { |
8204 | w = XWINDOW (window); | |
8205 | ||
5f5c8ee5 | 8206 | if (BUFFERP (w->buffer)) |
bd66d1ba | 8207 | { |
5f5c8ee5 GM |
8208 | struct buffer *b = XBUFFER (w->buffer); |
8209 | ||
c2213350 | 8210 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 8211 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 8212 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
8213 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
8214 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
8215 | ? Qt : Qnil); | |
bd66d1ba | 8216 | |
5f5c8ee5 GM |
8217 | #if 0 /* I don't think this is necessary because display_line does it. |
8218 | Let's check it. */ | |
bd66d1ba RS |
8219 | /* Record if we are showing a region, so can make sure to |
8220 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
8221 | w->region_showing |
8222 | = (!NILP (Vtransient_mark_mode) | |
8223 | && (w == XWINDOW (current_buffer->last_selected_window) | |
8224 | || highlight_nonselected_windows) | |
8225 | && (!NILP (b->mark_active) | |
8226 | ? Fmarker_position (b->mark) | |
8227 | : Qnil)); | |
8228 | #endif | |
8229 | ||
8230 | if (accurate_p) | |
8231 | { | |
8232 | b->clip_changed = 0; | |
9142dd5b GM |
8233 | b->prevent_redisplay_optimizations_p = 0; |
8234 | w->current_matrix->buffer = b; | |
8235 | w->current_matrix->begv = BUF_BEGV (b); | |
8236 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 GM |
8237 | w->last_cursor = w->cursor; |
8238 | w->last_cursor_off_p = w->cursor_off_p; | |
8239 | if (w == XWINDOW (selected_window)) | |
6fc556fd | 8240 | w->last_point = make_number (BUF_PT (b)); |
5f5c8ee5 | 8241 | else |
6fc556fd | 8242 | w->last_point = make_number (XMARKER (w->pointm)->charpos); |
5f5c8ee5 | 8243 | } |
bd66d1ba RS |
8244 | } |
8245 | ||
d2f84654 | 8246 | w->window_end_valid = w->buffer; |
a2889657 JB |
8247 | w->update_mode_line = Qnil; |
8248 | ||
265a9e55 | 8249 | if (!NILP (w->vchild)) |
5f5c8ee5 | 8250 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 8251 | if (!NILP (w->hchild)) |
5f5c8ee5 | 8252 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
8253 | } |
8254 | ||
5f5c8ee5 | 8255 | if (accurate_p) |
a2889657 | 8256 | { |
d45de95b | 8257 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
8258 | last_arrow_string = Voverlay_arrow_string; |
8259 | } | |
8260 | else | |
8261 | { | |
5f5c8ee5 GM |
8262 | /* Force a thorough redisplay the next time by setting |
8263 | last_arrow_position and last_arrow_string to t, which is | |
8264 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
8265 | last_arrow_position = Qt; |
8266 | last_arrow_string = Qt; | |
8267 | } | |
8268 | } | |
5f5c8ee5 GM |
8269 | |
8270 | ||
8271 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
8272 | C. Since a display table doesn't have any parent, we don't have to | |
8273 | follow parent. Do not call this function directly but use the | |
8274 | macro DISP_CHAR_VECTOR. */ | |
8275 | ||
8276 | Lisp_Object | |
8277 | disp_char_vector (dp, c) | |
8278 | struct Lisp_Char_Table *dp; | |
8279 | int c; | |
8280 | { | |
8281 | int code[4], i; | |
8282 | Lisp_Object val; | |
8283 | ||
8284 | if (SINGLE_BYTE_CHAR_P (c)) | |
8285 | return (dp->contents[c]); | |
8286 | ||
c5924f47 | 8287 | SPLIT_CHAR (c, code[0], code[1], code[2]); |
260a86a0 KH |
8288 | if (code[1] < 32) |
8289 | code[1] = -1; | |
8290 | else if (code[2] < 32) | |
8291 | code[2] = -1; | |
5f5c8ee5 GM |
8292 | |
8293 | /* Here, the possible range of code[0] (== charset ID) is | |
8294 | 128..max_charset. Since the top level char table contains data | |
8295 | for multibyte characters after 256th element, we must increment | |
8296 | code[0] by 128 to get a correct index. */ | |
8297 | code[0] += 128; | |
8298 | code[3] = -1; /* anchor */ | |
8299 | ||
8300 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
8301 | { | |
8302 | val = dp->contents[code[i]]; | |
8303 | if (!SUB_CHAR_TABLE_P (val)) | |
8304 | return (NILP (val) ? dp->defalt : val); | |
8305 | } | |
8306 | ||
8307 | /* Here, val is a sub char table. We return the default value of | |
8308 | it. */ | |
8309 | return (dp->defalt); | |
8310 | } | |
8311 | ||
8312 | ||
a2889657 | 8313 | \f |
5f5c8ee5 GM |
8314 | /*********************************************************************** |
8315 | Window Redisplay | |
8316 | ***********************************************************************/ | |
a2725ab2 | 8317 | |
5f5c8ee5 | 8318 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
8319 | |
8320 | static void | |
5f5c8ee5 GM |
8321 | redisplay_windows (window) |
8322 | Lisp_Object window; | |
90adcf20 | 8323 | { |
5f5c8ee5 GM |
8324 | while (!NILP (window)) |
8325 | { | |
8326 | struct window *w = XWINDOW (window); | |
8327 | ||
8328 | if (!NILP (w->hchild)) | |
8329 | redisplay_windows (w->hchild); | |
8330 | else if (!NILP (w->vchild)) | |
8331 | redisplay_windows (w->vchild); | |
8332 | else | |
8333 | redisplay_window (window, 0); | |
a2725ab2 | 8334 | |
5f5c8ee5 GM |
8335 | window = w->next; |
8336 | } | |
8337 | } | |
8338 | ||
8339 | ||
8340 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
8341 | DELTA is the number of bytes by which positions recorded in ROW | |
8342 | differ from current buffer positions. */ | |
8343 | ||
8344 | void | |
8345 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
8346 | struct window *w; | |
8347 | struct glyph_row *row; | |
8348 | struct glyph_matrix *matrix; | |
8349 | int delta, delta_bytes, dy, dvpos; | |
8350 | { | |
8351 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
8352 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
8353 | int x = row->x; | |
8354 | int pt_old = PT - delta; | |
8355 | ||
8356 | /* Skip over glyphs not having an object at the start of the row. | |
8357 | These are special glyphs like truncation marks on terminal | |
8358 | frames. */ | |
8359 | if (row->displays_text_p) | |
8360 | while (glyph < end | |
6fc556fd | 8361 | && INTEGERP (glyph->object) |
5f5c8ee5 GM |
8362 | && glyph->charpos < 0) |
8363 | { | |
8364 | x += glyph->pixel_width; | |
8365 | ++glyph; | |
8366 | } | |
8367 | ||
8368 | while (glyph < end | |
6fc556fd | 8369 | && !INTEGERP (glyph->object) |
5f5c8ee5 GM |
8370 | && (!BUFFERP (glyph->object) |
8371 | || glyph->charpos < pt_old)) | |
8372 | { | |
8373 | x += glyph->pixel_width; | |
8374 | ++glyph; | |
8375 | } | |
8376 | ||
8377 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
8378 | w->cursor.x = x; | |
8379 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
8380 | w->cursor.y = row->y + dy; | |
8381 | ||
8382 | if (w == XWINDOW (selected_window)) | |
8383 | { | |
8384 | if (!row->continued_p | |
8385 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
8386 | && row->x == 0) | |
8387 | { | |
8388 | this_line_buffer = XBUFFER (w->buffer); | |
8389 | ||
8390 | CHARPOS (this_line_start_pos) | |
8391 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
8392 | BYTEPOS (this_line_start_pos) | |
8393 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
8394 | ||
8395 | CHARPOS (this_line_end_pos) | |
8396 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
8397 | BYTEPOS (this_line_end_pos) | |
8398 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
8399 | ||
8400 | this_line_y = w->cursor.y; | |
8401 | this_line_pixel_height = row->height; | |
8402 | this_line_vpos = w->cursor.vpos; | |
8403 | this_line_start_x = row->x; | |
8404 | } | |
8405 | else | |
8406 | CHARPOS (this_line_start_pos) = 0; | |
8407 | } | |
8408 | } | |
8409 | ||
8410 | ||
8411 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
8412 | start STARTP. Sets the window start of WINDOW to that position. |
8413 | ||
8414 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
8415 | |
8416 | static INLINE struct text_pos | |
8417 | run_window_scroll_functions (window, startp) | |
8418 | Lisp_Object window; | |
8419 | struct text_pos startp; | |
8420 | { | |
8421 | struct window *w = XWINDOW (window); | |
8422 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
8423 | |
8424 | if (current_buffer != XBUFFER (w->buffer)) | |
8425 | abort (); | |
8426 | ||
5f5c8ee5 GM |
8427 | if (!NILP (Vwindow_scroll_functions)) |
8428 | { | |
8429 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
8430 | make_number (CHARPOS (startp))); | |
8431 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
8432 | /* In case the hook functions switch buffers. */ |
8433 | if (current_buffer != XBUFFER (w->buffer)) | |
8434 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8435 | } |
90adcf20 | 8436 | |
5f5c8ee5 GM |
8437 | return startp; |
8438 | } | |
8439 | ||
8440 | ||
8441 | /* Modify the desired matrix of window W and W->vscroll so that the | |
8442 | line containing the cursor is fully visible. */ | |
8443 | ||
8444 | static void | |
8445 | make_cursor_line_fully_visible (w) | |
8446 | struct window *w; | |
8447 | { | |
8448 | struct glyph_matrix *matrix; | |
8449 | struct glyph_row *row; | |
b28cb6ed | 8450 | int window_height, header_line_height; |
5f5c8ee5 GM |
8451 | |
8452 | /* It's not always possible to find the cursor, e.g, when a window | |
8453 | is full of overlay strings. Don't do anything in that case. */ | |
8454 | if (w->cursor.vpos < 0) | |
8455 | return; | |
8456 | ||
8457 | matrix = w->desired_matrix; | |
8458 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
8459 | ||
b28cb6ed GM |
8460 | /* If the cursor row is not partially visible, there's nothing |
8461 | to do. */ | |
8462 | if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8463 | return; | |
8464 | ||
8465 | /* If the row the cursor is in is taller than the window's height, | |
8466 | it's not clear what to do, so do nothing. */ | |
8467 | window_height = window_box_height (w); | |
8468 | if (row->height >= window_height) | |
8469 | return; | |
8470 | ||
8471 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
5f5c8ee5 GM |
8472 | { |
8473 | int dy = row->height - row->visible_height; | |
8474 | w->vscroll = 0; | |
8475 | w->cursor.y += dy; | |
8476 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
8477 | } | |
b28cb6ed | 8478 | else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */ |
5f5c8ee5 GM |
8479 | { |
8480 | int dy = - (row->height - row->visible_height); | |
8481 | w->vscroll = dy; | |
8482 | w->cursor.y += dy; | |
8483 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
8484 | } | |
b28cb6ed | 8485 | |
5f5c8ee5 GM |
8486 | /* When we change the cursor y-position of the selected window, |
8487 | change this_line_y as well so that the display optimization for | |
8488 | the cursor line of the selected window in redisplay_internal uses | |
8489 | the correct y-position. */ | |
8490 | if (w == XWINDOW (selected_window)) | |
8491 | this_line_y = w->cursor.y; | |
8492 | } | |
8493 | ||
8494 | ||
8495 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
8496 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
8497 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
8498 | in redisplay_window to bring a partially visible line into view in | |
8499 | the case that only the cursor has moved. | |
8500 | ||
8501 | Value is | |
8502 | ||
8503 | 1 if scrolling succeeded | |
8504 | ||
8505 | 0 if scrolling didn't find point. | |
8506 | ||
8507 | -1 if new fonts have been loaded so that we must interrupt | |
8508 | redisplay, adjust glyph matrices, and try again. */ | |
8509 | ||
8510 | static int | |
8511 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
8512 | scroll_step, temp_scroll_step) | |
8513 | Lisp_Object window; | |
8514 | int just_this_one_p; | |
8515 | int scroll_conservatively, scroll_step; | |
8516 | int temp_scroll_step; | |
8517 | { | |
8518 | struct window *w = XWINDOW (window); | |
8519 | struct frame *f = XFRAME (w->frame); | |
8520 | struct text_pos scroll_margin_pos; | |
8521 | struct text_pos pos; | |
8522 | struct text_pos startp; | |
8523 | struct it it; | |
8524 | Lisp_Object window_end; | |
8525 | int this_scroll_margin; | |
8526 | int dy = 0; | |
8527 | int scroll_max; | |
8528 | int line_height, rc; | |
8529 | int amount_to_scroll = 0; | |
8530 | Lisp_Object aggressive; | |
8531 | int height; | |
8532 | ||
8533 | #if GLYPH_DEBUG | |
8534 | debug_method_add (w, "try_scrolling"); | |
78614721 | 8535 | #endif |
5f5c8ee5 GM |
8536 | |
8537 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
8538 | ||
8539 | /* Compute scroll margin height in pixels. We scroll when point is | |
8540 | within this distance from the top or bottom of the window. */ | |
8541 | if (scroll_margin > 0) | |
90adcf20 | 8542 | { |
5f5c8ee5 GM |
8543 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
8544 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8545 | } | |
8546 | else | |
8547 | this_scroll_margin = 0; | |
8548 | ||
8549 | /* Compute how much we should try to scroll maximally to bring point | |
8550 | into view. */ | |
8551 | if (scroll_step) | |
8552 | scroll_max = scroll_step; | |
8553 | else if (scroll_conservatively) | |
8554 | scroll_max = scroll_conservatively; | |
8555 | else if (temp_scroll_step) | |
8556 | scroll_max = temp_scroll_step; | |
8557 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
8558 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
8559 | /* We're trying to scroll because of aggressive scrolling | |
8560 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
8561 | there should be a variable for this. */ | |
8562 | scroll_max = 10; | |
8563 | else | |
8564 | scroll_max = 0; | |
8565 | scroll_max *= CANON_Y_UNIT (f); | |
8566 | ||
8567 | /* Decide whether we have to scroll down. Start at the window end | |
8568 | and move this_scroll_margin up to find the position of the scroll | |
8569 | margin. */ | |
8570 | window_end = Fwindow_end (window, Qt); | |
8571 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
8572 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
8573 | if (this_scroll_margin) | |
8574 | { | |
8575 | start_display (&it, w, scroll_margin_pos); | |
8576 | move_it_vertically (&it, - this_scroll_margin); | |
8577 | scroll_margin_pos = it.current.pos; | |
8578 | } | |
8579 | ||
8580 | if (PT >= CHARPOS (scroll_margin_pos)) | |
8581 | { | |
8582 | int y0; | |
8583 | ||
8584 | /* Point is in the scroll margin at the bottom of the window, or | |
8585 | below. Compute a new window start that makes point visible. */ | |
47589c8c | 8586 | |
5f5c8ee5 GM |
8587 | /* Compute the distance from the scroll margin to PT. |
8588 | Give up if the distance is greater than scroll_max. */ | |
8589 | start_display (&it, w, scroll_margin_pos); | |
8590 | y0 = it.current_y; | |
8591 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8592 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8593 | line_height = (it.max_ascent + it.max_descent | |
8594 | ? it.max_ascent + it.max_descent | |
8595 | : last_height); | |
8596 | dy = it.current_y + line_height - y0; | |
47589c8c | 8597 | |
5f5c8ee5 GM |
8598 | if (dy > scroll_max) |
8599 | return 0; | |
8600 | ||
8601 | /* Move the window start down. If scrolling conservatively, | |
8602 | move it just enough down to make point visible. If | |
8603 | scroll_step is set, move it down by scroll_step. */ | |
8604 | start_display (&it, w, startp); | |
8605 | ||
8606 | if (scroll_conservatively) | |
8607 | amount_to_scroll = dy; | |
8608 | else if (scroll_step || temp_scroll_step) | |
8609 | amount_to_scroll = scroll_max; | |
8610 | else | |
90adcf20 | 8611 | { |
5f5c8ee5 GM |
8612 | aggressive = current_buffer->scroll_down_aggressively; |
8613 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8614 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8615 | if (NUMBERP (aggressive)) |
8616 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8617 | } | |
a2725ab2 | 8618 | |
5f5c8ee5 GM |
8619 | if (amount_to_scroll <= 0) |
8620 | return 0; | |
a2725ab2 | 8621 | |
5f5c8ee5 GM |
8622 | move_it_vertically (&it, amount_to_scroll); |
8623 | startp = it.current.pos; | |
8624 | } | |
8625 | else | |
8626 | { | |
8627 | /* See if point is inside the scroll margin at the top of the | |
8628 | window. */ | |
8629 | scroll_margin_pos = startp; | |
8630 | if (this_scroll_margin) | |
8631 | { | |
8632 | start_display (&it, w, startp); | |
8633 | move_it_vertically (&it, this_scroll_margin); | |
8634 | scroll_margin_pos = it.current.pos; | |
8635 | } | |
8636 | ||
8637 | if (PT < CHARPOS (scroll_margin_pos)) | |
8638 | { | |
8639 | /* Point is in the scroll margin at the top of the window or | |
8640 | above what is displayed in the window. */ | |
8641 | int y0; | |
8642 | ||
8643 | /* Compute the vertical distance from PT to the scroll | |
8644 | margin position. Give up if distance is greater than | |
8645 | scroll_max. */ | |
8646 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
8647 | start_display (&it, w, pos); | |
8648 | y0 = it.current_y; | |
8649 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
8650 | it.last_visible_y, -1, | |
8651 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8652 | dy = it.current_y - y0; | |
8653 | if (dy > scroll_max) | |
8654 | return 0; | |
8655 | ||
8656 | /* Compute new window start. */ | |
8657 | start_display (&it, w, startp); | |
8658 | ||
8659 | if (scroll_conservatively) | |
8660 | amount_to_scroll = dy; | |
8661 | else if (scroll_step || temp_scroll_step) | |
8662 | amount_to_scroll = scroll_max; | |
538f13d4 | 8663 | else |
5f5c8ee5 GM |
8664 | { |
8665 | aggressive = current_buffer->scroll_up_aggressively; | |
8666 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8667 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8668 | if (NUMBERP (aggressive)) |
8669 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8670 | } | |
a2725ab2 | 8671 | |
5f5c8ee5 GM |
8672 | if (amount_to_scroll <= 0) |
8673 | return 0; | |
8674 | ||
8675 | move_it_vertically (&it, - amount_to_scroll); | |
8676 | startp = it.current.pos; | |
90adcf20 RS |
8677 | } |
8678 | } | |
a2889657 | 8679 | |
5f5c8ee5 GM |
8680 | /* Run window scroll functions. */ |
8681 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 8682 | |
5f5c8ee5 GM |
8683 | /* Display the window. Give up if new fonts are loaded, or if point |
8684 | doesn't appear. */ | |
8685 | if (!try_window (window, startp)) | |
8686 | rc = -1; | |
8687 | else if (w->cursor.vpos < 0) | |
8688 | { | |
8689 | clear_glyph_matrix (w->desired_matrix); | |
8690 | rc = 0; | |
8691 | } | |
8692 | else | |
8693 | { | |
8694 | /* Maybe forget recorded base line for line number display. */ | |
8695 | if (!just_this_one_p | |
8696 | || current_buffer->clip_changed | |
9142dd5b | 8697 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
8698 | w->base_line_number = Qnil; |
8699 | ||
8700 | /* If cursor ends up on a partially visible line, shift display | |
8701 | lines up or down. */ | |
8702 | make_cursor_line_fully_visible (w); | |
8703 | rc = 1; | |
8704 | } | |
8705 | ||
8706 | return rc; | |
a2889657 JB |
8707 | } |
8708 | ||
5f5c8ee5 GM |
8709 | |
8710 | /* Compute a suitable window start for window W if display of W starts | |
8711 | on a continuation line. Value is non-zero if a new window start | |
8712 | was computed. | |
8713 | ||
8714 | The new window start will be computed, based on W's width, starting | |
8715 | from the start of the continued line. It is the start of the | |
8716 | screen line with the minimum distance from the old start W->start. */ | |
8717 | ||
8718 | static int | |
8719 | compute_window_start_on_continuation_line (w) | |
8720 | struct window *w; | |
1f1ff51d | 8721 | { |
5f5c8ee5 GM |
8722 | struct text_pos pos, start_pos; |
8723 | int window_start_changed_p = 0; | |
1f1ff51d | 8724 | |
5f5c8ee5 | 8725 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 8726 | |
5f5c8ee5 GM |
8727 | /* If window start is on a continuation line... Window start may be |
8728 | < BEGV in case there's invisible text at the start of the | |
8729 | buffer (M-x rmail, for example). */ | |
8730 | if (CHARPOS (start_pos) > BEGV | |
8731 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 8732 | { |
5f5c8ee5 GM |
8733 | struct it it; |
8734 | struct glyph_row *row; | |
f3751a65 GM |
8735 | |
8736 | /* Handle the case that the window start is out of range. */ | |
8737 | if (CHARPOS (start_pos) < BEGV) | |
8738 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
8739 | else if (CHARPOS (start_pos) > ZV) | |
8740 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
8741 | |
8742 | /* Find the start of the continued line. This should be fast | |
8743 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 8744 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
8745 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
8746 | row, DEFAULT_FACE_ID); | |
8747 | reseat_at_previous_visible_line_start (&it); | |
8748 | ||
8749 | /* If the line start is "too far" away from the window start, | |
8750 | say it takes too much time to compute a new window start. */ | |
8751 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
8752 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
8753 | { | |
8754 | int min_distance, distance; | |
8755 | ||
8756 | /* Move forward by display lines to find the new window | |
8757 | start. If window width was enlarged, the new start can | |
8758 | be expected to be > the old start. If window width was | |
8759 | decreased, the new window start will be < the old start. | |
8760 | So, we're looking for the display line start with the | |
8761 | minimum distance from the old window start. */ | |
8762 | pos = it.current.pos; | |
8763 | min_distance = INFINITY; | |
8764 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
8765 | distance < min_distance) | |
8766 | { | |
8767 | min_distance = distance; | |
8768 | pos = it.current.pos; | |
8769 | move_it_by_lines (&it, 1, 0); | |
8770 | } | |
8771 | ||
8772 | /* Set the window start there. */ | |
8773 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
8774 | window_start_changed_p = 1; | |
8775 | } | |
1f1ff51d | 8776 | } |
5f5c8ee5 GM |
8777 | |
8778 | return window_start_changed_p; | |
1f1ff51d KH |
8779 | } |
8780 | ||
5f5c8ee5 | 8781 | |
47589c8c GM |
8782 | /* Try cursor movement in case text has not changes in window WINDOW, |
8783 | with window start STARTP. Value is | |
8784 | ||
8785 | 1 if successful | |
8786 | ||
8787 | 0 if this method cannot be used | |
8788 | ||
8789 | -1 if we know we have to scroll the display. *SCROLL_STEP is | |
8790 | set to 1, under certain circumstances, if we want to scroll as | |
8791 | if scroll-step were set to 1. See the code. */ | |
8792 | ||
8793 | static int | |
8794 | try_cursor_movement (window, startp, scroll_step) | |
8795 | Lisp_Object window; | |
8796 | struct text_pos startp; | |
8797 | int *scroll_step; | |
8798 | { | |
8799 | struct window *w = XWINDOW (window); | |
8800 | struct frame *f = XFRAME (w->frame); | |
8801 | int rc = 0; | |
8802 | ||
8803 | /* Handle case where text has not changed, only point, and it has | |
8804 | not moved off the frame. */ | |
8805 | if (/* Point may be in this window. */ | |
8806 | PT >= CHARPOS (startp) | |
8807 | /* If we don't check this, we are called to move the cursor in a | |
8808 | horizontally split window with a current matrix that doesn't | |
8809 | fit the display. */ | |
8810 | && !windows_or_buffers_changed | |
8811 | /* Selective display hasn't changed. */ | |
8812 | && !current_buffer->clip_changed | |
8813 | /* If force-mode-line-update was called, really redisplay; | |
8814 | that's how redisplay is forced after e.g. changing | |
8815 | buffer-invisibility-spec. */ | |
8816 | && NILP (w->update_mode_line) | |
8817 | /* Can't use this case if highlighting a region. When a | |
8818 | region exists, cursor movement has to do more than just | |
8819 | set the cursor. */ | |
8820 | && !(!NILP (Vtransient_mark_mode) | |
8821 | && !NILP (current_buffer->mark_active)) | |
8822 | && NILP (w->region_showing) | |
8823 | && NILP (Vshow_trailing_whitespace) | |
8824 | /* Right after splitting windows, last_point may be nil. */ | |
8825 | && INTEGERP (w->last_point) | |
8826 | /* This code is not used for mini-buffer for the sake of the case | |
8827 | of redisplaying to replace an echo area message; since in | |
8828 | that case the mini-buffer contents per se are usually | |
8829 | unchanged. This code is of no real use in the mini-buffer | |
8830 | since the handling of this_line_start_pos, etc., in redisplay | |
8831 | handles the same cases. */ | |
8832 | && !EQ (window, minibuf_window) | |
8833 | /* When splitting windows or for new windows, it happens that | |
8834 | redisplay is called with a nil window_end_vpos or one being | |
8835 | larger than the window. This should really be fixed in | |
8836 | window.c. I don't have this on my list, now, so we do | |
8837 | approximately the same as the old redisplay code. --gerd. */ | |
8838 | && INTEGERP (w->window_end_vpos) | |
8839 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
8840 | && (FRAME_WINDOW_P (f) | |
8841 | || !MARKERP (Voverlay_arrow_position) | |
8842 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) | |
8843 | { | |
8844 | int this_scroll_margin; | |
8845 | struct glyph_row *row; | |
8846 | ||
8847 | #if GLYPH_DEBUG | |
8848 | debug_method_add (w, "cursor movement"); | |
8849 | #endif | |
8850 | ||
8851 | /* Scroll if point within this distance from the top or bottom | |
8852 | of the window. This is a pixel value. */ | |
8853 | this_scroll_margin = max (0, scroll_margin); | |
8854 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
8855 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8856 | ||
8857 | /* Start with the row the cursor was displayed during the last | |
8858 | not paused redisplay. Give up if that row is not valid. */ | |
bd9d0f3f GM |
8859 | if (w->last_cursor.vpos < 0 |
8860 | || w->last_cursor.vpos >= w->current_matrix->nrows) | |
47589c8c GM |
8861 | rc = -1; |
8862 | else | |
8863 | { | |
8864 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
8865 | if (row->mode_line_p) | |
8866 | ++row; | |
8867 | if (!row->enabled_p) | |
8868 | rc = -1; | |
8869 | } | |
8870 | ||
8871 | if (rc == 0) | |
8872 | { | |
8873 | int scroll_p = 0; | |
8874 | ||
8875 | if (PT > XFASTINT (w->last_point)) | |
8876 | { | |
8877 | /* Point has moved forward. */ | |
8878 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
8879 | ||
8880 | while (MATRIX_ROW_END_CHARPOS (row) < PT | |
8881 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
8882 | { | |
8883 | xassert (row->enabled_p); | |
8884 | ++row; | |
8885 | } | |
8886 | ||
8887 | /* The end position of a row equals the start position | |
8888 | of the next row. If PT is there, we would rather | |
8889 | display it in the next line. Exceptions are when the | |
8890 | row ends in the middle of a character, or ends in | |
8891 | ZV. */ | |
8892 | if (MATRIX_ROW_BOTTOM_Y (row) < last_y | |
8893 | && MATRIX_ROW_END_CHARPOS (row) == PT | |
8894 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
8895 | && !row->ends_at_zv_p) | |
8896 | { | |
8897 | xassert (row->enabled_p); | |
8898 | ++row; | |
8899 | } | |
8900 | ||
8901 | /* If within the scroll margin, scroll. Note that | |
8902 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which | |
8903 | the next line would be drawn, and that | |
8904 | this_scroll_margin can be zero. */ | |
8905 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
8906 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
8907 | /* Line is completely visible last line in window | |
8908 | and PT is to be set in the next line. */ | |
8909 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
8910 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
8911 | && !row->ends_at_zv_p | |
8912 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
8913 | scroll_p = 1; | |
8914 | } | |
8915 | else if (PT < XFASTINT (w->last_point)) | |
8916 | { | |
8917 | /* Cursor has to be moved backward. Note that PT >= | |
8918 | CHARPOS (startp) because of the outer | |
8919 | if-statement. */ | |
8920 | while (!row->mode_line_p | |
8921 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
8922 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
8923 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
8924 | && (row->y > this_scroll_margin | |
8925 | || CHARPOS (startp) == BEGV)) | |
8926 | { | |
8927 | xassert (row->enabled_p); | |
8928 | --row; | |
8929 | } | |
8930 | ||
8931 | /* Consider the following case: Window starts at BEGV, | |
8932 | there is invisible, intangible text at BEGV, so that | |
8933 | display starts at some point START > BEGV. It can | |
8934 | happen that we are called with PT somewhere between | |
8935 | BEGV and START. Try to handle that case. */ | |
8936 | if (row < w->current_matrix->rows | |
8937 | || row->mode_line_p) | |
8938 | { | |
8939 | row = w->current_matrix->rows; | |
8940 | if (row->mode_line_p) | |
8941 | ++row; | |
8942 | } | |
8943 | ||
8944 | /* Due to newlines in overlay strings, we may have to | |
8945 | skip forward over overlay strings. */ | |
8946 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
8947 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
8948 | && !row->ends_at_zv_p) | |
8949 | ++row; | |
8950 | ||
8951 | /* If within the scroll margin, scroll. */ | |
8952 | if (row->y < this_scroll_margin | |
8953 | && CHARPOS (startp) != BEGV) | |
8954 | scroll_p = 1; | |
8955 | } | |
8956 | ||
8957 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8958 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8959 | { | |
8960 | /* if PT is not in the glyph row, give up. */ | |
8961 | rc = -1; | |
8962 | } | |
440fc135 | 8963 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) |
47589c8c GM |
8964 | { |
8965 | /* If we end up in a partially visible line, let's make it | |
8966 | fully visible, except when it's taller than the window, | |
8967 | in which case we can't do much about it. */ | |
440fc135 GM |
8968 | if (row->height > window_box_height (w)) |
8969 | { | |
8970 | *scroll_step = 1; | |
8971 | rc = -1; | |
8972 | } | |
8973 | else | |
8974 | { | |
8975 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8976 | try_window (window, startp); | |
8977 | make_cursor_line_fully_visible (w); | |
8978 | rc = 1; | |
8979 | } | |
47589c8c GM |
8980 | } |
8981 | else if (scroll_p) | |
8982 | rc = -1; | |
8983 | else | |
8984 | { | |
8985 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8986 | rc = 1; | |
8987 | } | |
8988 | } | |
8989 | } | |
8990 | ||
8991 | return rc; | |
8992 | } | |
8993 | ||
8994 | ||
5f5c8ee5 GM |
8995 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only |
8996 | selected_window is redisplayed. */ | |
90adcf20 | 8997 | |
a2889657 | 8998 | static void |
5f5c8ee5 | 8999 | redisplay_window (window, just_this_one_p) |
a2889657 | 9000 | Lisp_Object window; |
5f5c8ee5 | 9001 | int just_this_one_p; |
a2889657 | 9002 | { |
5f5c8ee5 GM |
9003 | struct window *w = XWINDOW (window); |
9004 | struct frame *f = XFRAME (w->frame); | |
9005 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 9006 | struct buffer *old = current_buffer; |
5f5c8ee5 | 9007 | struct text_pos lpoint, opoint, startp; |
e481f960 | 9008 | int update_mode_line; |
5f5c8ee5 GM |
9009 | int tem; |
9010 | struct it it; | |
9011 | /* Record it now because it's overwritten. */ | |
9012 | int current_matrix_up_to_date_p = 0; | |
5f5c8ee5 | 9013 | int temp_scroll_step = 0; |
2e54982e | 9014 | int count = specpdl_ptr - specpdl; |
47589c8c | 9015 | int rc; |
a2889657 | 9016 | |
5f5c8ee5 GM |
9017 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
9018 | opoint = lpoint; | |
a2889657 | 9019 | |
5f5c8ee5 GM |
9020 | /* W must be a leaf window here. */ |
9021 | xassert (!NILP (w->buffer)); | |
9022 | #if GLYPH_DEBUG | |
9023 | *w->desired_matrix->method = 0; | |
9024 | #endif | |
2e54982e RS |
9025 | |
9026 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
9027 | |
9028 | reconsider_clip_changes (w, buffer); | |
9029 | ||
5f5c8ee5 GM |
9030 | /* Has the mode line to be updated? */ |
9031 | update_mode_line = (!NILP (w->update_mode_line) | |
9032 | || update_mode_lines | |
9033 | || buffer->clip_changed); | |
8de2d90b JB |
9034 | |
9035 | if (MINI_WINDOW_P (w)) | |
9036 | { | |
5f5c8ee5 | 9037 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 9038 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
9039 | { |
9040 | if (update_mode_line) | |
9041 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 9042 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
9043 | goto finish_menu_bars; |
9044 | else | |
9045 | /* We've already displayed the echo area glyphs in this window. */ | |
9046 | goto finish_scroll_bars; | |
9047 | } | |
73af359d | 9048 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 9049 | { |
5f5c8ee5 GM |
9050 | /* W is a mini-buffer window, but it's not the currently |
9051 | active one, so clear it. */ | |
9052 | int yb = window_text_bottom_y (w); | |
9053 | struct glyph_row *row; | |
9054 | int y; | |
9055 | ||
9056 | for (y = 0, row = w->desired_matrix->rows; | |
9057 | y < yb; | |
9058 | y += row->height, ++row) | |
9059 | blank_row (w, row, y); | |
88f22aff | 9060 | goto finish_scroll_bars; |
8de2d90b JB |
9061 | } |
9062 | } | |
a2889657 | 9063 | |
5f5c8ee5 GM |
9064 | /* Otherwise set up data on this window; select its buffer and point |
9065 | value. */ | |
6a93695f GM |
9066 | /* Really select the buffer, for the sake of buffer-local |
9067 | variables. */ | |
9068 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
9069 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
9070 | ||
9071 | current_matrix_up_to_date_p | |
9072 | = (!NILP (w->window_end_valid) | |
9073 | && !current_buffer->clip_changed | |
9074 | && XFASTINT (w->last_modified) >= MODIFF | |
9075 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 9076 | |
5f5c8ee5 GM |
9077 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
9078 | the window end being valid, so set it to nil there. */ | |
9079 | if (windows_or_buffers_changed) | |
9080 | { | |
9081 | /* If window starts on a continuation line, maybe adjust the | |
9082 | window start in case the window's width changed. */ | |
9083 | if (XMARKER (w->start)->buffer == current_buffer) | |
9084 | compute_window_start_on_continuation_line (w); | |
9085 | ||
9086 | w->window_end_valid = Qnil; | |
9087 | } | |
12adba34 | 9088 | |
5f5c8ee5 GM |
9089 | /* Some sanity checks. */ |
9090 | CHECK_WINDOW_END (w); | |
9091 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 9092 | abort (); |
5f5c8ee5 | 9093 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 9094 | abort (); |
a2889657 | 9095 | |
28995e67 RS |
9096 | /* If %c is in mode line, update it if needed. */ |
9097 | if (!NILP (w->column_number_displayed) | |
9098 | /* This alternative quickly identifies a common case | |
9099 | where no change is needed. */ | |
9100 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
9101 | && XFASTINT (w->last_modified) >= MODIFF |
9102 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
9103 | && XFASTINT (w->column_number_displayed) != current_column ()) |
9104 | update_mode_line = 1; | |
9105 | ||
5f5c8ee5 GM |
9106 | /* Count number of windows showing the selected buffer. An indirect |
9107 | buffer counts as its base buffer. */ | |
9108 | if (!just_this_one_p) | |
42640f83 RS |
9109 | { |
9110 | struct buffer *current_base, *window_base; | |
9111 | current_base = current_buffer; | |
9112 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
9113 | if (current_base->base_buffer) | |
9114 | current_base = current_base->base_buffer; | |
9115 | if (window_base->base_buffer) | |
9116 | window_base = window_base->base_buffer; | |
9117 | if (current_base == window_base) | |
9118 | buffer_shared++; | |
9119 | } | |
a2889657 | 9120 | |
5f5c8ee5 GM |
9121 | /* Point refers normally to the selected window. For any other |
9122 | window, set up appropriate value. */ | |
a2889657 JB |
9123 | if (!EQ (window, selected_window)) |
9124 | { | |
12adba34 RS |
9125 | int new_pt = XMARKER (w->pointm)->charpos; |
9126 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 9127 | if (new_pt < BEGV) |
a2889657 | 9128 | { |
f67a0f51 | 9129 | new_pt = BEGV; |
12adba34 RS |
9130 | new_pt_byte = BEGV_BYTE; |
9131 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 9132 | } |
f67a0f51 | 9133 | else if (new_pt > (ZV - 1)) |
a2889657 | 9134 | { |
f67a0f51 | 9135 | new_pt = ZV; |
12adba34 RS |
9136 | new_pt_byte = ZV_BYTE; |
9137 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 9138 | } |
5f5c8ee5 | 9139 | |
f67a0f51 | 9140 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 9141 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
9142 | } |
9143 | ||
f4faa47c | 9144 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
9145 | have changed, invalidate the width run cache. It's true that |
9146 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
9147 | redisplay goes (non-fatally) haywire when the display table is |
9148 | changed, so why should we worry about doing any better? */ | |
9149 | if (current_buffer->width_run_cache) | |
9150 | { | |
f908610f | 9151 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
9152 | |
9153 | if (! disptab_matches_widthtab (disptab, | |
9154 | XVECTOR (current_buffer->width_table))) | |
9155 | { | |
9156 | invalidate_region_cache (current_buffer, | |
9157 | current_buffer->width_run_cache, | |
9158 | BEG, Z); | |
9159 | recompute_width_table (current_buffer, disptab); | |
9160 | } | |
9161 | } | |
9162 | ||
a2889657 | 9163 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
9164 | if (XMARKER (w->start)->buffer != current_buffer) |
9165 | goto recenter; | |
9166 | ||
5f5c8ee5 | 9167 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 9168 | |
cf0df6ab RS |
9169 | /* If someone specified a new starting point but did not insist, |
9170 | check whether it can be used. */ | |
cfad01b4 GM |
9171 | if (!NILP (w->optional_new_start) |
9172 | && CHARPOS (startp) >= BEGV | |
9173 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
9174 | { |
9175 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
9176 | start_display (&it, w, startp); |
9177 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
9178 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
9179 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
9180 | w->force_start = Qt; |
9181 | } | |
9182 | ||
8de2d90b | 9183 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 9184 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
9185 | if (!NILP (w->force_start) |
9186 | || w->frozen_window_start_p) | |
a2889657 | 9187 | { |
e63574d7 | 9188 | w->force_start = Qnil; |
5f5c8ee5 | 9189 | w->vscroll = 0; |
b5174a51 | 9190 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
9191 | |
9192 | /* Forget any recorded base line for line number display. */ | |
9193 | if (!current_matrix_up_to_date_p | |
9194 | || current_buffer->clip_changed) | |
9195 | w->base_line_number = Qnil; | |
9196 | ||
75c43375 RS |
9197 | /* Redisplay the mode line. Select the buffer properly for that. |
9198 | Also, run the hook window-scroll-functions | |
9199 | because we have scrolled. */ | |
e63574d7 RS |
9200 | /* Note, we do this after clearing force_start because |
9201 | if there's an error, it is better to forget about force_start | |
9202 | than to get into an infinite loop calling the hook functions | |
9203 | and having them get more errors. */ | |
75c43375 RS |
9204 | if (!update_mode_line |
9205 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 9206 | { |
e481f960 RS |
9207 | update_mode_line = 1; |
9208 | w->update_mode_line = Qt; | |
5f5c8ee5 | 9209 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 9210 | } |
5f5c8ee5 | 9211 | |
c2213350 | 9212 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 9213 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
9214 | if (CHARPOS (startp) < BEGV) |
9215 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
9216 | else if (CHARPOS (startp) > ZV) | |
9217 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
9218 | ||
9219 | /* Redisplay, then check if cursor has been set during the | |
9220 | redisplay. Give up if new fonts were loaded. */ | |
9221 | if (!try_window (window, startp)) | |
9222 | { | |
9223 | w->force_start = Qt; | |
9224 | clear_glyph_matrix (w->desired_matrix); | |
9225 | goto restore_buffers; | |
9226 | } | |
9227 | ||
9472f927 | 9228 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 | 9229 | { |
b28cb6ed GM |
9230 | /* If point does not appear, try to move point so it does |
9231 | appear. The desired matrix has been built above, so we | |
9232 | can use it here. */ | |
9233 | int window_height; | |
9234 | struct glyph_row *row; | |
9235 | ||
9236 | window_height = window_box_height (w) / 2; | |
9237 | row = MATRIX_FIRST_TEXT_ROW (w->desired_matrix); | |
9238 | while (MATRIX_ROW_BOTTOM_Y (row) < window_height) | |
5f5c8ee5 GM |
9239 | ++row; |
9240 | ||
9241 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
9242 | MATRIX_ROW_START_BYTEPOS (row)); | |
9243 | ||
90adcf20 | 9244 | if (w != XWINDOW (selected_window)) |
12adba34 | 9245 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
9246 | else if (current_buffer == old) |
9247 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
9248 | ||
9249 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
9250 | ||
9251 | /* If we are highlighting the region, then we just changed | |
9252 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
9253 | if (!NILP (Vtransient_mark_mode) |
9254 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 9255 | { |
5f5c8ee5 GM |
9256 | clear_glyph_matrix (w->desired_matrix); |
9257 | if (!try_window (window, startp)) | |
9258 | goto restore_buffers; | |
6f27fa9b | 9259 | } |
a2889657 | 9260 | } |
5f5c8ee5 GM |
9261 | |
9262 | make_cursor_line_fully_visible (w); | |
9263 | #if GLYPH_DEBUG | |
9264 | debug_method_add (w, "forced window start"); | |
9265 | #endif | |
a2889657 JB |
9266 | goto done; |
9267 | } | |
9268 | ||
5f5c8ee5 GM |
9269 | /* Handle case where text has not changed, only point, and it has |
9270 | not moved off the frame. */ | |
9271 | if (current_matrix_up_to_date_p | |
47589c8c GM |
9272 | && (rc = try_cursor_movement (window, startp, &temp_scroll_step), |
9273 | rc != 0)) | |
a2889657 | 9274 | { |
47589c8c | 9275 | if (rc == -1) |
5f5c8ee5 | 9276 | goto try_to_scroll; |
47589c8c GM |
9277 | else |
9278 | goto done; | |
a2889657 JB |
9279 | } |
9280 | /* If current starting point was originally the beginning of a line | |
9281 | but no longer is, find a new starting point. */ | |
265a9e55 | 9282 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
9283 | && !(CHARPOS (startp) <= BEGV |
9284 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 9285 | { |
5f5c8ee5 GM |
9286 | #if GLYPH_DEBUG |
9287 | debug_method_add (w, "recenter 1"); | |
9288 | #endif | |
a2889657 JB |
9289 | goto recenter; |
9290 | } | |
5f5c8ee5 GM |
9291 | |
9292 | /* Try scrolling with try_window_id. */ | |
9142dd5b GM |
9293 | else if (/* Windows and buffers haven't changed. */ |
9294 | !windows_or_buffers_changed | |
5f5c8ee5 GM |
9295 | /* Window must be either use window-based redisplay or |
9296 | be full width. */ | |
9297 | && (FRAME_WINDOW_P (f) | |
c59c668a | 9298 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))) |
5f5c8ee5 GM |
9299 | && !MINI_WINDOW_P (w) |
9300 | /* Point is not known NOT to appear in window. */ | |
9301 | && PT >= CHARPOS (startp) | |
a2889657 | 9302 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
9303 | /* Window is not hscrolled. */ |
9304 | && XFASTINT (w->hscroll) == 0 | |
9305 | /* Selective display has not changed. */ | |
9306 | && !current_buffer->clip_changed | |
9307 | /* Current matrix is up to date. */ | |
9308 | && !NILP (w->window_end_valid) | |
9309 | /* Can't use this case if highlighting a region because | |
9310 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
9311 | && !(!NILP (Vtransient_mark_mode) |
9312 | && !NILP (current_buffer->mark_active)) | |
9313 | && NILP (w->region_showing) | |
8f897821 | 9314 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 | 9315 | /* Overlay arrow position and string not changed. */ |
d45de95b | 9316 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 9317 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
9318 | /* Value is > 0 if update has been done, it is -1 if we |
9319 | know that the same window start will not work. It is 0 | |
9320 | if unsuccessful for some other reason. */ | |
9321 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 9322 | { |
5f5c8ee5 | 9323 | #if GLYPH_DEBUG |
ef121659 | 9324 | debug_method_add (w, "try_window_id %d", tem); |
5f5c8ee5 GM |
9325 | #endif |
9326 | ||
9327 | if (fonts_changed_p) | |
9328 | goto restore_buffers; | |
a2889657 JB |
9329 | if (tem > 0) |
9330 | goto done; | |
ef121659 | 9331 | |
5f5c8ee5 GM |
9332 | /* Otherwise try_window_id has returned -1 which means that we |
9333 | don't want the alternative below this comment to execute. */ | |
a2889657 | 9334 | } |
5f5c8ee5 GM |
9335 | else if (CHARPOS (startp) >= BEGV |
9336 | && CHARPOS (startp) <= ZV | |
9337 | && PT >= CHARPOS (startp) | |
9338 | && (CHARPOS (startp) < ZV | |
e9874cee | 9339 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 9340 | || CHARPOS (startp) == BEGV |
8850a573 RS |
9341 | || (XFASTINT (w->last_modified) >= MODIFF |
9342 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 9343 | { |
5f5c8ee5 GM |
9344 | #if GLYPH_DEBUG |
9345 | debug_method_add (w, "same window start"); | |
9346 | #endif | |
9347 | ||
9348 | /* Try to redisplay starting at same place as before. | |
9349 | If point has not moved off frame, accept the results. */ | |
9350 | if (!current_matrix_up_to_date_p | |
9351 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
9352 | because a window scroll function can have changed the |
9353 | buffer. */ | |
5f5c8ee5 GM |
9354 | || !NILP (Vwindow_scroll_functions) |
9355 | || MINI_WINDOW_P (w) | |
9356 | || !try_window_reusing_current_matrix (w)) | |
9357 | { | |
9358 | IF_DEBUG (debug_method_add (w, "1")); | |
9359 | try_window (window, startp); | |
9360 | } | |
9361 | ||
9362 | if (fonts_changed_p) | |
9363 | goto restore_buffers; | |
9364 | ||
9365 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 9366 | { |
5f5c8ee5 GM |
9367 | if (!just_this_one_p |
9368 | || current_buffer->clip_changed | |
9142dd5b | 9369 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
9370 | /* Forget any recorded base line for line number display. */ |
9371 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
9372 | |
9373 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
9374 | goto done; |
9375 | } | |
a2889657 | 9376 | else |
5f5c8ee5 | 9377 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
9378 | } |
9379 | ||
5f5c8ee5 GM |
9380 | try_to_scroll: |
9381 | ||
c2213350 | 9382 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 9383 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 9384 | |
e481f960 RS |
9385 | /* Redisplay the mode line. Select the buffer properly for that. */ |
9386 | if (!update_mode_line) | |
9387 | { | |
e481f960 RS |
9388 | update_mode_line = 1; |
9389 | w->update_mode_line = Qt; | |
9390 | } | |
a2889657 | 9391 | |
5f5c8ee5 GM |
9392 | /* Try to scroll by specified few lines. */ |
9393 | if ((scroll_conservatively | |
9394 | || scroll_step | |
9395 | || temp_scroll_step | |
9396 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
9397 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 9398 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
9399 | && CHARPOS (startp) >= BEGV |
9400 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 9401 | { |
5f5c8ee5 GM |
9402 | /* The function returns -1 if new fonts were loaded, 1 if |
9403 | successful, 0 if not successful. */ | |
9404 | int rc = try_scrolling (window, just_this_one_p, | |
9405 | scroll_conservatively, | |
9406 | scroll_step, | |
9407 | temp_scroll_step); | |
9408 | if (rc > 0) | |
9409 | goto done; | |
9410 | else if (rc < 0) | |
9411 | goto restore_buffers; | |
9412 | } | |
f9c8af06 | 9413 | |
5f5c8ee5 | 9414 | /* Finally, just choose place to start which centers point */ |
5936754e | 9415 | |
5f5c8ee5 | 9416 | recenter: |
44173109 | 9417 | |
5f5c8ee5 GM |
9418 | #if GLYPH_DEBUG |
9419 | debug_method_add (w, "recenter"); | |
9420 | #endif | |
0789adb2 | 9421 | |
5f5c8ee5 | 9422 | /* w->vscroll = 0; */ |
0789adb2 | 9423 | |
5f5c8ee5 GM |
9424 | /* Forget any previously recorded base line for line number display. */ |
9425 | if (!current_matrix_up_to_date_p | |
9426 | || current_buffer->clip_changed) | |
9427 | w->base_line_number = Qnil; | |
9428 | ||
9429 | /* Move backward half the height of the window. */ | |
9430 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
9431 | it.current_y = it.last_visible_y; | |
9432 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
9433 | xassert (IT_CHARPOS (it) >= BEGV); | |
9434 | ||
9435 | /* The function move_it_vertically_backward may move over more | |
9436 | than the specified y-distance. If it->w is small, e.g. a | |
9437 | mini-buffer window, we may end up in front of the window's | |
9438 | display area. Start displaying at the start of the line | |
9439 | containing PT in this case. */ | |
9440 | if (it.current_y <= 0) | |
9441 | { | |
9442 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
9443 | move_it_vertically (&it, 0); | |
9444 | xassert (IT_CHARPOS (it) <= PT); | |
9445 | it.current_y = 0; | |
0789adb2 RS |
9446 | } |
9447 | ||
5f5c8ee5 GM |
9448 | it.current_x = it.hpos = 0; |
9449 | ||
9450 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
9451 | in case the window-scroll-functions functions get errors. */ | |
9452 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
9453 | ||
9454 | /* Run scroll hooks. */ | |
9455 | startp = run_window_scroll_functions (window, it.current.pos); | |
9456 | ||
9457 | /* Redisplay the window. */ | |
9458 | if (!current_matrix_up_to_date_p | |
9459 | || windows_or_buffers_changed | |
9460 | /* Don't use try_window_reusing_current_matrix in this case | |
9461 | because it can have changed the buffer. */ | |
9462 | || !NILP (Vwindow_scroll_functions) | |
9463 | || !just_this_one_p | |
9464 | || MINI_WINDOW_P (w) | |
9465 | || !try_window_reusing_current_matrix (w)) | |
9466 | try_window (window, startp); | |
9467 | ||
9468 | /* If new fonts have been loaded (due to fontsets), give up. We | |
9469 | have to start a new redisplay since we need to re-adjust glyph | |
9470 | matrices. */ | |
9471 | if (fonts_changed_p) | |
9472 | goto restore_buffers; | |
9473 | ||
9474 | /* If cursor did not appear assume that the middle of the window is | |
9475 | in the first line of the window. Do it again with the next line. | |
9476 | (Imagine a window of height 100, displaying two lines of height | |
9477 | 60. Moving back 50 from it->last_visible_y will end in the first | |
9478 | line.) */ | |
9479 | if (w->cursor.vpos < 0) | |
a2889657 | 9480 | { |
5f5c8ee5 GM |
9481 | if (!NILP (w->window_end_valid) |
9482 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 9483 | { |
5f5c8ee5 GM |
9484 | clear_glyph_matrix (w->desired_matrix); |
9485 | move_it_by_lines (&it, 1, 0); | |
9486 | try_window (window, it.current.pos); | |
a2889657 | 9487 | } |
5f5c8ee5 | 9488 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 9489 | { |
5f5c8ee5 GM |
9490 | clear_glyph_matrix (w->desired_matrix); |
9491 | move_it_by_lines (&it, -1, 0); | |
9492 | try_window (window, it.current.pos); | |
9493 | } | |
9494 | else | |
9495 | { | |
9496 | /* Not much we can do about it. */ | |
a2889657 | 9497 | } |
a2889657 | 9498 | } |
010494d0 | 9499 | |
5f5c8ee5 GM |
9500 | /* Consider the following case: Window starts at BEGV, there is |
9501 | invisible, intangible text at BEGV, so that display starts at | |
9502 | some point START > BEGV. It can happen that we are called with | |
9503 | PT somewhere between BEGV and START. Try to handle that case. */ | |
9504 | if (w->cursor.vpos < 0) | |
835766b6 | 9505 | { |
5f5c8ee5 GM |
9506 | struct glyph_row *row = w->current_matrix->rows; |
9507 | if (row->mode_line_p) | |
9508 | ++row; | |
9509 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 9510 | } |
5f5c8ee5 GM |
9511 | |
9512 | make_cursor_line_fully_visible (w); | |
b5174a51 | 9513 | |
74d481ac GM |
9514 | done: |
9515 | ||
5f5c8ee5 GM |
9516 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
9517 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
9518 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
9519 | ? Qt : Qnil); | |
a2889657 | 9520 | |
5f5c8ee5 | 9521 | /* Display the mode line, if we must. */ |
e481f960 | 9522 | if ((update_mode_line |
aa6d10fa | 9523 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
9524 | if (a) the window to its side is being redone and |
9525 | (b) we do a frame-based redisplay. This is a consequence | |
9526 | of how inverted lines are drawn in frame-based redisplay. */ | |
9527 | || (!just_this_one_p | |
9528 | && !FRAME_WINDOW_P (f) | |
9529 | && !WINDOW_FULL_WIDTH_P (w)) | |
9530 | /* Line number to display. */ | |
155ef550 | 9531 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 9532 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
9533 | || (!NILP (w->column_number_displayed) |
9534 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
9535 | /* This means that the window has a mode line. */ |
9536 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 9537 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 9538 | { |
5da11938 GM |
9539 | Lisp_Object old_selected_frame; |
9540 | ||
9541 | old_selected_frame = selected_frame; | |
9542 | ||
5da11938 | 9543 | XSETFRAME (selected_frame, f); |
5f5c8ee5 | 9544 | display_mode_lines (w); |
5da11938 | 9545 | selected_frame = old_selected_frame; |
5f5c8ee5 GM |
9546 | |
9547 | /* If mode line height has changed, arrange for a thorough | |
9548 | immediate redisplay using the correct mode line height. */ | |
9549 | if (WINDOW_WANTS_MODELINE_P (w) | |
9550 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 9551 | { |
5f5c8ee5 GM |
9552 | fonts_changed_p = 1; |
9553 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
9554 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 9555 | } |
5f5c8ee5 GM |
9556 | |
9557 | /* If top line height has changed, arrange for a thorough | |
9558 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
9559 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9560 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
9561 | { |
9562 | fonts_changed_p = 1; | |
045dee35 GM |
9563 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
9564 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
9565 | } |
9566 | ||
9567 | if (fonts_changed_p) | |
9568 | goto restore_buffers; | |
5ba50c51 | 9569 | } |
5f5c8ee5 GM |
9570 | |
9571 | if (!line_number_displayed | |
9572 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
9573 | { |
9574 | w->base_line_pos = Qnil; | |
9575 | w->base_line_number = Qnil; | |
9576 | } | |
a2889657 | 9577 | |
5f5c8ee5 GM |
9578 | finish_menu_bars: |
9579 | ||
7ce2c095 | 9580 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 9581 | if (update_mode_line |
5f5c8ee5 GM |
9582 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
9583 | { | |
9584 | int redisplay_menu_p = 0; | |
9585 | ||
9586 | if (FRAME_WINDOW_P (f)) | |
9587 | { | |
dc937613 | 9588 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 9589 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 9590 | #else |
5f5c8ee5 | 9591 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 9592 | #endif |
5f5c8ee5 GM |
9593 | } |
9594 | else | |
9595 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
9596 | ||
9597 | if (redisplay_menu_p) | |
9598 | display_menu_bar (w); | |
9599 | ||
9600 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
9601 | if (WINDOWP (f->tool_bar_window) |
9602 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
9603 | || auto_resize_tool_bars_p)) | |
9604 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
9605 | #endif |
9606 | } | |
7ce2c095 | 9607 | |
88f22aff | 9608 | finish_scroll_bars: |
5f5c8ee5 | 9609 | |
88f22aff | 9610 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 9611 | { |
b1d1124b | 9612 | int start, end, whole; |
30c566e4 | 9613 | |
b1d1124b | 9614 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
9615 | At some point, it would be nice to choose between scrollbars |
9616 | which reflect the whole buffer size, with special markers | |
9617 | indicating narrowing, and scrollbars which reflect only the | |
9618 | visible region. | |
9619 | ||
5f5c8ee5 | 9620 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 9621 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 9622 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 9623 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 9624 | { |
8a9311d7 | 9625 | whole = ZV - BEGV; |
4d641a15 | 9626 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
9627 | /* I don't think this is guaranteed to be right. For the |
9628 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 9629 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 9630 | |
5f5c8ee5 GM |
9631 | if (end < start) |
9632 | end = start; | |
9633 | if (whole < (end - start)) | |
9634 | whole = end - start; | |
b1d1124b JB |
9635 | } |
9636 | else | |
9637 | start = end = whole = 0; | |
30c566e4 | 9638 | |
88f22aff | 9639 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 9640 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 9641 | |
5f5c8ee5 GM |
9642 | /* Note that we actually used the scroll bar attached to this |
9643 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 9644 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 9645 | } |
b1d1124b | 9646 | |
5f5c8ee5 GM |
9647 | restore_buffers: |
9648 | ||
9649 | /* Restore current_buffer and value of point in it. */ | |
9650 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
6a93695f | 9651 | set_buffer_internal_1 (old); |
5f5c8ee5 | 9652 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
9653 | |
9654 | unbind_to (count, Qnil); | |
a2889657 | 9655 | } |
a2889657 | 9656 | |
5f5c8ee5 GM |
9657 | |
9658 | /* Build the complete desired matrix of WINDOW with a window start | |
9659 | buffer position POS. Value is non-zero if successful. It is zero | |
9660 | if fonts were loaded during redisplay which makes re-adjusting | |
9661 | glyph matrices necessary. */ | |
9662 | ||
9663 | int | |
a2889657 JB |
9664 | try_window (window, pos) |
9665 | Lisp_Object window; | |
5f5c8ee5 GM |
9666 | struct text_pos pos; |
9667 | { | |
9668 | struct window *w = XWINDOW (window); | |
9669 | struct it it; | |
9670 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 9671 | |
5f5c8ee5 GM |
9672 | /* Make POS the new window start. */ |
9673 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 9674 | |
5f5c8ee5 GM |
9675 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
9676 | w->cursor.vpos = -1; | |
a2889657 | 9677 | overlay_arrow_seen = 0; |
642eefc6 | 9678 | |
5f5c8ee5 GM |
9679 | /* Initialize iterator and info to start at POS. */ |
9680 | start_display (&it, w, pos); | |
a2889657 | 9681 | |
5f5c8ee5 GM |
9682 | /* Display all lines of W. */ |
9683 | while (it.current_y < it.last_visible_y) | |
9684 | { | |
9685 | if (display_line (&it)) | |
9686 | last_text_row = it.glyph_row - 1; | |
9687 | if (fonts_changed_p) | |
9688 | return 0; | |
9689 | } | |
a2889657 | 9690 | |
5f5c8ee5 GM |
9691 | /* If bottom moved off end of frame, change mode line percentage. */ |
9692 | if (XFASTINT (w->window_end_pos) <= 0 | |
9693 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
9694 | w->update_mode_line = Qt; |
9695 | ||
5f5c8ee5 GM |
9696 | /* Set window_end_pos to the offset of the last character displayed |
9697 | on the window from the end of current_buffer. Set | |
9698 | window_end_vpos to its row number. */ | |
9699 | if (last_text_row) | |
9700 | { | |
9701 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
9702 | w->window_end_bytepos | |
9703 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9704 | XSETFASTINT (w->window_end_pos, | |
9705 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9706 | XSETFASTINT (w->window_end_vpos, | |
9707 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9708 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
9709 | ->displays_text_p); | |
9710 | } | |
9711 | else | |
9712 | { | |
9713 | w->window_end_bytepos = 0; | |
9714 | XSETFASTINT (w->window_end_pos, 0); | |
9715 | XSETFASTINT (w->window_end_vpos, 0); | |
9716 | } | |
9717 | ||
a2889657 JB |
9718 | /* But that is not valid info until redisplay finishes. */ |
9719 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 9720 | return 1; |
a2889657 | 9721 | } |
5f5c8ee5 GM |
9722 | |
9723 | ||
a2889657 | 9724 | \f |
5f5c8ee5 GM |
9725 | /************************************************************************ |
9726 | Window redisplay reusing current matrix when buffer has not changed | |
9727 | ************************************************************************/ | |
9728 | ||
9729 | /* Try redisplay of window W showing an unchanged buffer with a | |
9730 | different window start than the last time it was displayed by | |
9731 | reusing its current matrix. Value is non-zero if successful. | |
9732 | W->start is the new window start. */ | |
a2889657 JB |
9733 | |
9734 | static int | |
5f5c8ee5 GM |
9735 | try_window_reusing_current_matrix (w) |
9736 | struct window *w; | |
a2889657 | 9737 | { |
5f5c8ee5 GM |
9738 | struct frame *f = XFRAME (w->frame); |
9739 | struct glyph_row *row, *bottom_row; | |
9740 | struct it it; | |
9741 | struct run run; | |
9742 | struct text_pos start, new_start; | |
9743 | int nrows_scrolled, i; | |
9744 | struct glyph_row *last_text_row; | |
9745 | struct glyph_row *last_reused_text_row; | |
9746 | struct glyph_row *start_row; | |
9747 | int start_vpos, min_y, max_y; | |
9748 | ||
d18354b6 GM |
9749 | |
9750 | if (/* This function doesn't handle terminal frames. */ | |
9751 | !FRAME_WINDOW_P (f) | |
9752 | /* Don't try to reuse the display if windows have been split | |
9753 | or such. */ | |
9754 | || windows_or_buffers_changed) | |
5f5c8ee5 | 9755 | return 0; |
a2889657 | 9756 | |
5f5c8ee5 GM |
9757 | /* Can't do this if region may have changed. */ |
9758 | if ((!NILP (Vtransient_mark_mode) | |
9759 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
9760 | || !NILP (w->region_showing) |
9761 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 9762 | return 0; |
a2889657 | 9763 | |
5f5c8ee5 | 9764 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
9765 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9766 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
9767 | return 0; |
9768 | ||
9769 | /* Give up if old or new display is scrolled vertically. We could | |
9770 | make this function handle this, but right now it doesn't. */ | |
9771 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9772 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
9773 | return 0; | |
9774 | ||
9775 | /* The variable new_start now holds the new window start. The old | |
9776 | start `start' can be determined from the current matrix. */ | |
9777 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
9778 | start = start_row->start.pos; | |
9779 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 9780 | |
5f5c8ee5 GM |
9781 | /* Clear the desired matrix for the display below. */ |
9782 | clear_glyph_matrix (w->desired_matrix); | |
9783 | ||
9784 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
9785 | { | |
9786 | int first_row_y; | |
9787 | ||
9788 | IF_DEBUG (debug_method_add (w, "twu1")); | |
9789 | ||
9790 | /* Display up to a row that can be reused. The variable | |
9791 | last_text_row is set to the last row displayed that displays | |
9792 | text. */ | |
9793 | start_display (&it, w, new_start); | |
9794 | first_row_y = it.current_y; | |
9795 | w->cursor.vpos = -1; | |
9796 | last_text_row = last_reused_text_row = NULL; | |
9797 | while (it.current_y < it.last_visible_y | |
9798 | && IT_CHARPOS (it) < CHARPOS (start) | |
9799 | && !fonts_changed_p) | |
9800 | if (display_line (&it)) | |
9801 | last_text_row = it.glyph_row - 1; | |
9802 | ||
9803 | /* A value of current_y < last_visible_y means that we stopped | |
9804 | at the previous window start, which in turn means that we | |
9805 | have at least one reusable row. */ | |
9806 | if (it.current_y < it.last_visible_y) | |
a2889657 | 9807 | { |
5f5c8ee5 GM |
9808 | nrows_scrolled = it.vpos; |
9809 | ||
9810 | /* Find PT if not already found in the lines displayed. */ | |
9811 | if (w->cursor.vpos < 0) | |
a2889657 | 9812 | { |
5f5c8ee5 GM |
9813 | int dy = it.current_y - first_row_y; |
9814 | ||
9815 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9816 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9817 | { | |
9818 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
9819 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9820 | { | |
9821 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
9822 | dy, nrows_scrolled); | |
9823 | break; | |
9824 | } | |
9825 | ||
9826 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
9827 | break; | |
9828 | ||
9829 | ++row; | |
9830 | } | |
9831 | ||
9832 | /* Give up if point was not found. This shouldn't | |
9833 | happen often; not more often than with try_window | |
9834 | itself. */ | |
9835 | if (w->cursor.vpos < 0) | |
9836 | { | |
9837 | clear_glyph_matrix (w->desired_matrix); | |
9838 | return 0; | |
9839 | } | |
a2889657 | 9840 | } |
5f5c8ee5 GM |
9841 | |
9842 | /* Scroll the display. Do it before the current matrix is | |
9843 | changed. The problem here is that update has not yet | |
9844 | run, i.e. part of the current matrix is not up to date. | |
9845 | scroll_run_hook will clear the cursor, and use the | |
9846 | current matrix to get the height of the row the cursor is | |
9847 | in. */ | |
9848 | run.current_y = first_row_y; | |
9849 | run.desired_y = it.current_y; | |
9850 | run.height = it.last_visible_y - it.current_y; | |
15e26c76 GM |
9851 | if (run.height > 0 |
9852 | && run.current_y != run.desired_y) | |
a2889657 | 9853 | { |
5f5c8ee5 GM |
9854 | update_begin (f); |
9855 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 9856 | rif->clear_mouse_face (w); |
5f5c8ee5 | 9857 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 9858 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 | 9859 | update_end (f); |
a2889657 | 9860 | } |
5f5c8ee5 GM |
9861 | |
9862 | /* Shift current matrix down by nrows_scrolled lines. */ | |
9863 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9864 | rotate_matrix (w->current_matrix, | |
9865 | start_vpos, | |
9866 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9867 | nrows_scrolled); | |
9868 | ||
9869 | /* Disable lines not reused. */ | |
9870 | for (i = 0; i < it.vpos; ++i) | |
9871 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
9872 | ||
9873 | /* Re-compute Y positions. */ | |
9874 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
045dee35 | 9875 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9876 | max_y = it.last_visible_y; |
9877 | while (row < bottom_row) | |
d2f84654 | 9878 | { |
5f5c8ee5 GM |
9879 | row->y = it.current_y; |
9880 | ||
9881 | if (row->y < min_y) | |
9882 | row->visible_height = row->height - (min_y - row->y); | |
9883 | else if (row->y + row->height > max_y) | |
9884 | row->visible_height | |
9885 | = row->height - (row->y + row->height - max_y); | |
9886 | else | |
9887 | row->visible_height = row->height; | |
9888 | ||
9889 | it.current_y += row->height; | |
9890 | ++it.vpos; | |
9891 | ||
9892 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9893 | last_reused_text_row = row; | |
9894 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
9895 | break; | |
9896 | ++row; | |
d2f84654 | 9897 | } |
a2889657 | 9898 | } |
5f5c8ee5 GM |
9899 | |
9900 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
9901 | reused row from the current matrix containing text, if any. | |
9902 | The value of last_text_row is the last displayed line | |
9903 | containing text. */ | |
9904 | if (last_reused_text_row) | |
a2889657 | 9905 | { |
5f5c8ee5 GM |
9906 | w->window_end_bytepos |
9907 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
9908 | XSETFASTINT (w->window_end_pos, | |
9909 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
9910 | XSETFASTINT (w->window_end_vpos, | |
9911 | MATRIX_ROW_VPOS (last_reused_text_row, | |
9912 | w->current_matrix)); | |
a2889657 | 9913 | } |
5f5c8ee5 GM |
9914 | else if (last_text_row) |
9915 | { | |
9916 | w->window_end_bytepos | |
9917 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9918 | XSETFASTINT (w->window_end_pos, | |
9919 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9920 | XSETFASTINT (w->window_end_vpos, | |
9921 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9922 | } | |
9923 | else | |
9924 | { | |
9925 | /* This window must be completely empty. */ | |
9926 | w->window_end_bytepos = 0; | |
9927 | XSETFASTINT (w->window_end_pos, 0); | |
9928 | XSETFASTINT (w->window_end_vpos, 0); | |
9929 | } | |
9930 | w->window_end_valid = Qnil; | |
a2889657 | 9931 | |
5f5c8ee5 GM |
9932 | /* Update hint: don't try scrolling again in update_window. */ |
9933 | w->desired_matrix->no_scrolling_p = 1; | |
9934 | ||
9935 | #if GLYPH_DEBUG | |
9936 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
9937 | #endif | |
9938 | return 1; | |
a2889657 | 9939 | } |
5f5c8ee5 GM |
9940 | else if (CHARPOS (new_start) > CHARPOS (start)) |
9941 | { | |
9942 | struct glyph_row *pt_row, *row; | |
9943 | struct glyph_row *first_reusable_row; | |
9944 | struct glyph_row *first_row_to_display; | |
9945 | int dy; | |
9946 | int yb = window_text_bottom_y (w); | |
9947 | ||
9948 | IF_DEBUG (debug_method_add (w, "twu2")); | |
9949 | ||
9950 | /* Find the row starting at new_start, if there is one. Don't | |
9951 | reuse a partially visible line at the end. */ | |
9952 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9953 | while (first_reusable_row->enabled_p | |
9954 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
9955 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9956 | < CHARPOS (new_start))) | |
9957 | ++first_reusable_row; | |
9958 | ||
9959 | /* Give up if there is no row to reuse. */ | |
9960 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
9961 | || !first_reusable_row->enabled_p |
9962 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9963 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
9964 | return 0; |
9965 | ||
5f5c8ee5 GM |
9966 | /* We can reuse fully visible rows beginning with |
9967 | first_reusable_row to the end of the window. Set | |
9968 | first_row_to_display to the first row that cannot be reused. | |
9969 | Set pt_row to the row containing point, if there is any. */ | |
9970 | first_row_to_display = first_reusable_row; | |
9971 | pt_row = NULL; | |
9972 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
9973 | { | |
9974 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
9975 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
9976 | pt_row = first_row_to_display; | |
a2889657 | 9977 | |
5f5c8ee5 GM |
9978 | ++first_row_to_display; |
9979 | } | |
a2889657 | 9980 | |
5f5c8ee5 GM |
9981 | /* Start displaying at the start of first_row_to_display. */ |
9982 | xassert (first_row_to_display->y < yb); | |
9983 | init_to_row_start (&it, w, first_row_to_display); | |
9984 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
9985 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
9986 | - nrows_scrolled); | |
9987 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
9988 | ||
9989 | /* Display lines beginning with first_row_to_display in the | |
9990 | desired matrix. Set last_text_row to the last row displayed | |
9991 | that displays text. */ | |
9992 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
9993 | if (pt_row == NULL) | |
9994 | w->cursor.vpos = -1; | |
9995 | last_text_row = NULL; | |
9996 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
9997 | if (display_line (&it)) | |
9998 | last_text_row = it.glyph_row - 1; | |
9999 | ||
10000 | /* Give up If point isn't in a row displayed or reused. */ | |
10001 | if (w->cursor.vpos < 0) | |
10002 | { | |
10003 | clear_glyph_matrix (w->desired_matrix); | |
10004 | return 0; | |
10005 | } | |
12adba34 | 10006 | |
5f5c8ee5 GM |
10007 | /* If point is in a reused row, adjust y and vpos of the cursor |
10008 | position. */ | |
10009 | if (pt_row) | |
10010 | { | |
10011 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
10012 | w->current_matrix); | |
10013 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
10014 | } |
10015 | ||
5f5c8ee5 GM |
10016 | /* Scroll the display. */ |
10017 | run.current_y = first_reusable_row->y; | |
045dee35 | 10018 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
10019 | run.height = it.last_visible_y - run.current_y; |
10020 | if (run.height) | |
10021 | { | |
10022 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
10023 | update_begin (f); | |
10024 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 10025 | rif->clear_mouse_face (w); |
5f5c8ee5 | 10026 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 10027 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
10028 | update_end (f); |
10029 | } | |
a2889657 | 10030 | |
5f5c8ee5 GM |
10031 | /* Adjust Y positions of reused rows. */ |
10032 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
10033 | row = first_reusable_row; | |
10034 | dy = first_reusable_row->y; | |
045dee35 | 10035 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
10036 | max_y = it.last_visible_y; |
10037 | while (row < first_row_to_display) | |
10038 | { | |
10039 | row->y -= dy; | |
10040 | if (row->y < min_y) | |
10041 | row->visible_height = row->height - (min_y - row->y); | |
10042 | else if (row->y + row->height > max_y) | |
10043 | row->visible_height | |
10044 | = row->height - (row->y + row->height - max_y); | |
10045 | else | |
10046 | row->visible_height = row->height; | |
10047 | ++row; | |
10048 | } | |
a2889657 | 10049 | |
5f5c8ee5 GM |
10050 | /* Disable rows not reused. */ |
10051 | while (row < bottom_row) | |
10052 | { | |
10053 | row->enabled_p = 0; | |
10054 | ++row; | |
10055 | } | |
10056 | ||
10057 | /* Scroll the current matrix. */ | |
10058 | xassert (nrows_scrolled > 0); | |
10059 | rotate_matrix (w->current_matrix, | |
10060 | start_vpos, | |
10061 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
10062 | -nrows_scrolled); | |
10063 | ||
10064 | /* Adjust window end. A null value of last_text_row means that | |
10065 | the window end is in reused rows which in turn means that | |
10066 | only its vpos can have changed. */ | |
10067 | if (last_text_row) | |
10068 | { | |
10069 | w->window_end_bytepos | |
10070 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
10071 | XSETFASTINT (w->window_end_pos, | |
10072 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10073 | XSETFASTINT (w->window_end_vpos, | |
10074 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
10075 | } | |
10076 | else | |
a2889657 | 10077 | { |
e8e536a9 | 10078 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 10079 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 10080 | } |
5f5c8ee5 GM |
10081 | |
10082 | w->window_end_valid = Qnil; | |
10083 | w->desired_matrix->no_scrolling_p = 1; | |
10084 | ||
10085 | #if GLYPH_DEBUG | |
10086 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
10087 | #endif | |
10088 | return 1; | |
a2889657 | 10089 | } |
5f5c8ee5 GM |
10090 | |
10091 | return 0; | |
10092 | } | |
a2889657 | 10093 | |
a2889657 | 10094 | |
5f5c8ee5 GM |
10095 | \f |
10096 | /************************************************************************ | |
10097 | Window redisplay reusing current matrix when buffer has changed | |
10098 | ************************************************************************/ | |
10099 | ||
10100 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
10101 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
10102 | int *, int *)); | |
10103 | static struct glyph_row * | |
10104 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
10105 | struct glyph_row *)); | |
10106 | ||
10107 | ||
10108 | /* Return the last row in MATRIX displaying text. If row START is | |
10109 | non-null, start searching with that row. IT gives the dimensions | |
10110 | of the display. Value is null if matrix is empty; otherwise it is | |
10111 | a pointer to the row found. */ | |
10112 | ||
10113 | static struct glyph_row * | |
10114 | find_last_row_displaying_text (matrix, it, start) | |
10115 | struct glyph_matrix *matrix; | |
10116 | struct it *it; | |
10117 | struct glyph_row *start; | |
10118 | { | |
10119 | struct glyph_row *row, *row_found; | |
10120 | ||
10121 | /* Set row_found to the last row in IT->w's current matrix | |
10122 | displaying text. The loop looks funny but think of partially | |
10123 | visible lines. */ | |
10124 | row_found = NULL; | |
10125 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
10126 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
10127 | { | |
10128 | xassert (row->enabled_p); | |
10129 | row_found = row; | |
10130 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
10131 | break; | |
10132 | ++row; | |
a2889657 | 10133 | } |
5f5c8ee5 GM |
10134 | |
10135 | return row_found; | |
10136 | } | |
10137 | ||
a2889657 | 10138 | |
5f5c8ee5 GM |
10139 | /* Return the last row in the current matrix of W that is not affected |
10140 | by changes at the start of current_buffer that occurred since the | |
10141 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 10142 | |
5f5c8ee5 GM |
10143 | The global variable beg_unchanged has to contain the number of |
10144 | bytes unchanged at the start of current_buffer. BEG + | |
10145 | beg_unchanged is the buffer position of the first changed byte in | |
10146 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
10147 | at the same buffer positions as they were when the current matrix | |
10148 | was built. */ | |
10149 | ||
10150 | static struct glyph_row * | |
10151 | get_last_unchanged_at_beg_row (w) | |
10152 | struct window *w; | |
10153 | { | |
9142dd5b | 10154 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
10155 | struct glyph_row *row; |
10156 | struct glyph_row *row_found = NULL; | |
10157 | int yb = window_text_bottom_y (w); | |
10158 | ||
10159 | /* Find the last row displaying unchanged text. */ | |
10160 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10161 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
10162 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 10163 | { |
5f5c8ee5 GM |
10164 | if (/* If row ends before first_changed_pos, it is unchanged, |
10165 | except in some case. */ | |
10166 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
10167 | /* When row ends in ZV and we write at ZV it is not | |
10168 | unchanged. */ | |
10169 | && !row->ends_at_zv_p | |
10170 | /* When first_changed_pos is the end of a continued line, | |
10171 | row is not unchanged because it may be no longer | |
10172 | continued. */ | |
10173 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
10174 | && row->continued_p)) | |
10175 | row_found = row; | |
10176 | ||
10177 | /* Stop if last visible row. */ | |
10178 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
10179 | break; | |
10180 | ||
10181 | ++row; | |
a2889657 JB |
10182 | } |
10183 | ||
5f5c8ee5 | 10184 | return row_found; |
a2889657 | 10185 | } |
5f5c8ee5 GM |
10186 | |
10187 | ||
10188 | /* Find the first glyph row in the current matrix of W that is not | |
10189 | affected by changes at the end of current_buffer since the last | |
10190 | time the window was redisplayed. Return in *DELTA the number of | |
c59c668a GM |
10191 | chars by which buffer positions in unchanged text at the end of |
10192 | current_buffer must be adjusted. Return in *DELTA_BYTES the | |
10193 | corresponding number of bytes. Value is null if no such row | |
10194 | exists, i.e. all rows are affected by changes. */ | |
5f5c8ee5 GM |
10195 | |
10196 | static struct glyph_row * | |
10197 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
10198 | struct window *w; | |
10199 | int *delta, *delta_bytes; | |
a2889657 | 10200 | { |
5f5c8ee5 GM |
10201 | struct glyph_row *row; |
10202 | struct glyph_row *row_found = NULL; | |
c581d710 | 10203 | |
5f5c8ee5 | 10204 | *delta = *delta_bytes = 0; |
b2a76982 | 10205 | |
5f5c8ee5 GM |
10206 | /* A value of window_end_pos >= end_unchanged means that the window |
10207 | end is in the range of changed text. If so, there is no | |
10208 | unchanged row at the end of W's current matrix. */ | |
10209 | xassert (!NILP (w->window_end_valid)); | |
9142dd5b | 10210 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
10211 | return NULL; |
10212 | ||
10213 | /* Set row to the last row in W's current matrix displaying text. */ | |
10214 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
10215 | ||
5f5c8ee5 GM |
10216 | /* If matrix is entirely empty, no unchanged row exists. */ |
10217 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
10218 | { | |
10219 | /* The value of row is the last glyph row in the matrix having a | |
10220 | meaningful buffer position in it. The end position of row | |
10221 | corresponds to window_end_pos. This allows us to translate | |
10222 | buffer positions in the current matrix to current buffer | |
10223 | positions for characters not in changed text. */ | |
10224 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
10225 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
10226 | int last_unchanged_pos, last_unchanged_pos_old; | |
10227 | struct glyph_row *first_text_row | |
10228 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10229 | ||
10230 | *delta = Z - Z_old; | |
10231 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
10232 | ||
10233 | /* Set last_unchanged_pos to the buffer position of the last | |
10234 | character in the buffer that has not been changed. Z is the | |
10235 | index + 1 of the last byte in current_buffer, i.e. by | |
10236 | subtracting end_unchanged we get the index of the last | |
10237 | unchanged character, and we have to add BEG to get its buffer | |
10238 | position. */ | |
9142dd5b | 10239 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
10240 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
10241 | ||
10242 | /* Search backward from ROW for a row displaying a line that | |
10243 | starts at a minimum position >= last_unchanged_pos_old. */ | |
10244 | while (row >= first_text_row) | |
10245 | { | |
10246 | xassert (row->enabled_p); | |
10247 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
10248 | ||
10249 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
10250 | row_found = row; | |
10251 | --row; | |
10252 | } | |
10253 | } | |
10254 | ||
10255 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
10256 | return row_found; | |
c581d710 RS |
10257 | } |
10258 | ||
c581d710 | 10259 | |
5f5c8ee5 GM |
10260 | /* Make sure that glyph rows in the current matrix of window W |
10261 | reference the same glyph memory as corresponding rows in the | |
10262 | frame's frame matrix. This function is called after scrolling W's | |
10263 | current matrix on a terminal frame in try_window_id and | |
10264 | try_window_reusing_current_matrix. */ | |
10265 | ||
10266 | static void | |
10267 | sync_frame_with_window_matrix_rows (w) | |
10268 | struct window *w; | |
c581d710 | 10269 | { |
5f5c8ee5 GM |
10270 | struct frame *f = XFRAME (w->frame); |
10271 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
10272 | ||
10273 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
10274 | must have a frame matrix. */ | |
10275 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
10276 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
10277 | xassert (!FRAME_WINDOW_P (f)); | |
10278 | ||
10279 | /* If W is a full-width window, glyph pointers in W's current matrix | |
10280 | have, by definition, to be the same as glyph pointers in the | |
10281 | corresponding frame matrix. */ | |
10282 | window_row = w->current_matrix->rows; | |
10283 | window_row_end = window_row + w->current_matrix->nrows; | |
10284 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
10285 | while (window_row < window_row_end) | |
659a218f | 10286 | { |
5f5c8ee5 | 10287 | int area; |
f002db93 | 10288 | |
5f5c8ee5 GM |
10289 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) |
10290 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
f002db93 GM |
10291 | |
10292 | /* Disable frame rows whose corresponding window rows have | |
10293 | been disabled in try_window_id. */ | |
10294 | if (!window_row->enabled_p) | |
10295 | frame_row->enabled_p = 0; | |
10296 | ||
5f5c8ee5 | 10297 | ++window_row, ++frame_row; |
659a218f | 10298 | } |
a2889657 | 10299 | } |
5f5c8ee5 GM |
10300 | |
10301 | ||
e037b9ec GM |
10302 | /* Find the glyph row in window W containing CHARPOS. Consider all |
10303 | rows between START and END (not inclusive). END null means search | |
10304 | all rows to the end of the display area of W. Value is the row | |
10305 | containing CHARPOS or null. */ | |
10306 | ||
10307 | static struct glyph_row * | |
10308 | row_containing_pos (w, charpos, start, end) | |
10309 | struct window *w; | |
10310 | int charpos; | |
10311 | struct glyph_row *start, *end; | |
10312 | { | |
10313 | struct glyph_row *row = start; | |
10314 | int last_y; | |
10315 | ||
10316 | /* If we happen to start on a header-line, skip that. */ | |
10317 | if (row->mode_line_p) | |
10318 | ++row; | |
10319 | ||
10320 | if ((end && row >= end) || !row->enabled_p) | |
10321 | return NULL; | |
10322 | ||
10323 | last_y = window_text_bottom_y (w); | |
10324 | ||
10325 | while ((end == NULL || row < end) | |
10326 | && (MATRIX_ROW_END_CHARPOS (row) < charpos | |
10327 | /* The end position of a row equals the start | |
10328 | position of the next row. If CHARPOS is there, we | |
10329 | would rather display it in the next line, except | |
10330 | when this line ends in ZV. */ | |
10331 | || (MATRIX_ROW_END_CHARPOS (row) == charpos | |
10332 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
10333 | || !row->ends_at_zv_p))) | |
10334 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
10335 | ++row; | |
10336 | ||
10337 | /* Give up if CHARPOS not found. */ | |
10338 | if ((end && row >= end) | |
10339 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
10340 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
10341 | row = NULL; | |
10342 | ||
10343 | return row; | |
10344 | } | |
10345 | ||
10346 | ||
5f5c8ee5 GM |
10347 | /* Try to redisplay window W by reusing its existing display. W's |
10348 | current matrix must be up to date when this function is called, | |
10349 | i.e. window_end_valid must not be nil. | |
10350 | ||
10351 | Value is | |
10352 | ||
10353 | 1 if display has been updated | |
10354 | 0 if otherwise unsuccessful | |
10355 | -1 if redisplay with same window start is known not to succeed | |
10356 | ||
10357 | The following steps are performed: | |
10358 | ||
10359 | 1. Find the last row in the current matrix of W that is not | |
10360 | affected by changes at the start of current_buffer. If no such row | |
10361 | is found, give up. | |
10362 | ||
10363 | 2. Find the first row in W's current matrix that is not affected by | |
10364 | changes at the end of current_buffer. Maybe there is no such row. | |
10365 | ||
10366 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
10367 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
10368 | the window. | |
10369 | ||
10370 | 4. If cursor is not known to appear on the window, give up. | |
10371 | ||
10372 | 5. If display stopped at the row found in step 2, scroll the | |
10373 | display and current matrix as needed. | |
10374 | ||
10375 | 6. Maybe display some lines at the end of W, if we must. This can | |
10376 | happen under various circumstances, like a partially visible line | |
10377 | becoming fully visible, or because newly displayed lines are displayed | |
10378 | in smaller font sizes. | |
10379 | ||
10380 | 7. Update W's window end information. */ | |
10381 | ||
10382 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
10383 | |
10384 | static int | |
5f5c8ee5 | 10385 | try_window_id (w) |
12adba34 | 10386 | struct window *w; |
12adba34 | 10387 | { |
5f5c8ee5 GM |
10388 | struct frame *f = XFRAME (w->frame); |
10389 | struct glyph_matrix *current_matrix = w->current_matrix; | |
10390 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
10391 | struct glyph_row *last_unchanged_at_beg_row; | |
10392 | struct glyph_row *first_unchanged_at_end_row; | |
10393 | struct glyph_row *row; | |
10394 | struct glyph_row *bottom_row; | |
10395 | int bottom_vpos; | |
10396 | struct it it; | |
10397 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
10398 | struct text_pos start_pos; | |
10399 | struct run run; | |
10400 | int first_unchanged_at_end_vpos = 0; | |
10401 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
10402 | struct text_pos start; | |
10403 | ||
10404 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
10405 | ||
10406 | /* Check pre-conditions. Window end must be valid, otherwise | |
10407 | the current matrix would not be up to date. */ | |
10408 | xassert (!NILP (w->window_end_valid)); | |
10409 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
10410 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
10411 | ||
10412 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
10413 | only if buffer has really changed. The reason is that the gap is | |
10414 | initially at Z for freshly visited files. The code below would | |
10415 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
10416 | if (MODIFF > SAVE_MODIFF |
10417 | /* This seems to happen sometimes after saving a buffer. */ | |
10418 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 10419 | { |
9142dd5b GM |
10420 | if (GPT - BEG < BEG_UNCHANGED) |
10421 | BEG_UNCHANGED = GPT - BEG; | |
10422 | if (Z - GPT < END_UNCHANGED) | |
10423 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 10424 | } |
bf9249e3 | 10425 | |
5f5c8ee5 GM |
10426 | /* If window starts after a line end, and the last change is in |
10427 | front of that newline, then changes don't affect the display. | |
f2d86d7a GM |
10428 | This case happens with stealth-fontification. Note that although |
10429 | the display is unchanged, glyph positions in the matrix have to | |
10430 | be adjusted, of course. */ | |
5f5c8ee5 GM |
10431 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); |
10432 | if (CHARPOS (start) > BEGV | |
9142dd5b | 10433 | && Z - END_UNCHANGED < CHARPOS (start) - 1 |
5f5c8ee5 GM |
10434 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' |
10435 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
10436 | { | |
f2d86d7a GM |
10437 | struct glyph_row *r0 = MATRIX_FIRST_TEXT_ROW (current_matrix); |
10438 | int delta = CHARPOS (start) - MATRIX_ROW_START_CHARPOS (r0); | |
10439 | ||
10440 | if (delta) | |
10441 | { | |
10442 | struct glyph_row *r1 = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
10443 | int delta_bytes = BYTEPOS (start) - MATRIX_ROW_START_BYTEPOS (r0); | |
10444 | ||
10445 | increment_matrix_positions (w->current_matrix, | |
10446 | MATRIX_ROW_VPOS (r0, current_matrix), | |
10447 | MATRIX_ROW_VPOS (r1, current_matrix), | |
10448 | delta, delta_bytes); | |
10449 | } | |
10450 | ||
10451 | #if 0 /* If changes are all in front of the window start, the | |
10452 | distance of the last displayed glyph from Z hasn't | |
10453 | changed. */ | |
5f5c8ee5 GM |
10454 | w->window_end_pos |
10455 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
10456 | w->window_end_bytepos | |
6fc556fd | 10457 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
f2d86d7a GM |
10458 | #endif |
10459 | ||
5f5c8ee5 GM |
10460 | return 1; |
10461 | } | |
10462 | ||
10463 | /* Return quickly if changes are all below what is displayed in the | |
10464 | window, and if PT is in the window. */ | |
9142dd5b | 10465 | if (BEG_UNCHANGED > MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 GM |
10466 | && PT < MATRIX_ROW_END_CHARPOS (row)) |
10467 | { | |
10468 | /* We have to update window end positions because the buffer's | |
10469 | size has changed. */ | |
10470 | w->window_end_pos | |
10471 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
10472 | w->window_end_bytepos | |
6fc556fd | 10473 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); |
ef121659 GM |
10474 | |
10475 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10476 | row = row_containing_pos (w, PT, row, NULL); | |
10477 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
10478 | return 2; | |
5f5c8ee5 GM |
10479 | } |
10480 | ||
10481 | /* Check that window start agrees with the start of the first glyph | |
10482 | row in its current matrix. Check this after we know the window | |
10483 | start is not in changed text, otherwise positions would not be | |
10484 | comparable. */ | |
10485 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10486 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
10487 | return 0; | |
10488 | ||
5f5c8ee5 GM |
10489 | /* Compute the position at which we have to start displaying new |
10490 | lines. Some of the lines at the top of the window might be | |
10491 | reusable because they are not displaying changed text. Find the | |
10492 | last row in W's current matrix not affected by changes at the | |
10493 | start of current_buffer. Value is null if changes start in the | |
10494 | first line of window. */ | |
10495 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
10496 | if (last_unchanged_at_beg_row) | |
10497 | { | |
10498 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
10499 | start_pos = it.current.pos; | |
10500 | ||
10501 | /* Start displaying new lines in the desired matrix at the same | |
10502 | vpos we would use in the current matrix, i.e. below | |
10503 | last_unchanged_at_beg_row. */ | |
10504 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
10505 | current_matrix); | |
10506 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10507 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
10508 | ||
10509 | xassert (it.hpos == 0 && it.current_x == 0); | |
10510 | } | |
10511 | else | |
10512 | { | |
10513 | /* There are no reusable lines at the start of the window. | |
10514 | Start displaying in the first line. */ | |
10515 | start_display (&it, w, start); | |
10516 | start_pos = it.current.pos; | |
10517 | } | |
10518 | ||
5f5c8ee5 GM |
10519 | /* Find the first row that is not affected by changes at the end of |
10520 | the buffer. Value will be null if there is no unchanged row, in | |
10521 | which case we must redisplay to the end of the window. delta | |
10522 | will be set to the value by which buffer positions beginning with | |
10523 | first_unchanged_at_end_row have to be adjusted due to text | |
10524 | changes. */ | |
10525 | first_unchanged_at_end_row | |
10526 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
10527 | IF_DEBUG (debug_delta = delta); | |
10528 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
10529 | ||
10530 | /* Set stop_pos to the buffer position up to which we will have to | |
10531 | display new lines. If first_unchanged_at_end_row != NULL, this | |
10532 | is the buffer position of the start of the line displayed in that | |
10533 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
10534 | that we don't stop at a buffer position. */ | |
10535 | stop_pos = 0; | |
10536 | if (first_unchanged_at_end_row) | |
10537 | { | |
10538 | xassert (last_unchanged_at_beg_row == NULL | |
10539 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
10540 | ||
10541 | /* If this is a continuation line, move forward to the next one | |
10542 | that isn't. Changes in lines above affect this line. | |
10543 | Caution: this may move first_unchanged_at_end_row to a row | |
10544 | not displaying text. */ | |
10545 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
10546 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
10547 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
10548 | < it.last_visible_y)) | |
10549 | ++first_unchanged_at_end_row; | |
10550 | ||
10551 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
10552 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
10553 | >= it.last_visible_y)) | |
10554 | first_unchanged_at_end_row = NULL; | |
10555 | else | |
10556 | { | |
10557 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
10558 | + delta); | |
10559 | first_unchanged_at_end_vpos | |
10560 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 10561 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
10562 | } |
10563 | } | |
10564 | else if (last_unchanged_at_beg_row == NULL) | |
10565 | return 0; | |
10566 | ||
10567 | ||
10568 | #if GLYPH_DEBUG | |
10569 | ||
10570 | /* Either there is no unchanged row at the end, or the one we have | |
10571 | now displays text. This is a necessary condition for the window | |
10572 | end pos calculation at the end of this function. */ | |
10573 | xassert (first_unchanged_at_end_row == NULL | |
10574 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
10575 | ||
10576 | debug_last_unchanged_at_beg_vpos | |
10577 | = (last_unchanged_at_beg_row | |
10578 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
10579 | : -1); | |
10580 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
10581 | ||
10582 | #endif /* GLYPH_DEBUG != 0 */ | |
10583 | ||
10584 | ||
10585 | /* Display new lines. Set last_text_row to the last new line | |
10586 | displayed which has text on it, i.e. might end up as being the | |
10587 | line where the window_end_vpos is. */ | |
10588 | w->cursor.vpos = -1; | |
10589 | last_text_row = NULL; | |
10590 | overlay_arrow_seen = 0; | |
10591 | while (it.current_y < it.last_visible_y | |
10592 | && !fonts_changed_p | |
10593 | && (first_unchanged_at_end_row == NULL | |
10594 | || IT_CHARPOS (it) < stop_pos)) | |
10595 | { | |
10596 | if (display_line (&it)) | |
10597 | last_text_row = it.glyph_row - 1; | |
10598 | } | |
10599 | ||
10600 | if (fonts_changed_p) | |
10601 | return -1; | |
10602 | ||
10603 | ||
10604 | /* Compute differences in buffer positions, y-positions etc. for | |
10605 | lines reused at the bottom of the window. Compute what we can | |
10606 | scroll. */ | |
ca42b2e8 GM |
10607 | if (first_unchanged_at_end_row |
10608 | /* No lines reused because we displayed everything up to the | |
10609 | bottom of the window. */ | |
10610 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
10611 | { |
10612 | dvpos = (it.vpos | |
10613 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
10614 | current_matrix)); | |
10615 | dy = it.current_y - first_unchanged_at_end_row->y; | |
10616 | run.current_y = first_unchanged_at_end_row->y; | |
10617 | run.desired_y = run.current_y + dy; | |
10618 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
10619 | } | |
10620 | else | |
ca42b2e8 GM |
10621 | { |
10622 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
10623 | first_unchanged_at_end_row = NULL; | |
10624 | } | |
5f5c8ee5 GM |
10625 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
10626 | ||
8f8ba186 | 10627 | |
5f5c8ee5 GM |
10628 | /* Find the cursor if not already found. We have to decide whether |
10629 | PT will appear on this window (it sometimes doesn't, but this is | |
10630 | not a very frequent case.) This decision has to be made before | |
10631 | the current matrix is altered. A value of cursor.vpos < 0 means | |
10632 | that PT is either in one of the lines beginning at | |
10633 | first_unchanged_at_end_row or below the window. Don't care for | |
10634 | lines that might be displayed later at the window end; as | |
10635 | mentioned, this is not a frequent case. */ | |
10636 | if (w->cursor.vpos < 0) | |
10637 | { | |
5f5c8ee5 GM |
10638 | /* Cursor in unchanged rows at the top? */ |
10639 | if (PT < CHARPOS (start_pos) | |
10640 | && last_unchanged_at_beg_row) | |
10641 | { | |
e037b9ec GM |
10642 | row = row_containing_pos (w, PT, |
10643 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
10644 | last_unchanged_at_beg_row + 1); | |
bfe0ee88 GM |
10645 | if (row) |
10646 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
5f5c8ee5 GM |
10647 | } |
10648 | ||
10649 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
10650 | else if (first_unchanged_at_end_row) | |
10651 | { | |
e037b9ec GM |
10652 | row = row_containing_pos (w, PT - delta, |
10653 | first_unchanged_at_end_row, NULL); | |
10654 | if (row) | |
468155d7 GM |
10655 | set_cursor_from_row (w, row, w->current_matrix, delta, |
10656 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
10657 | } |
10658 | ||
10659 | /* Give up if cursor was not found. */ | |
10660 | if (w->cursor.vpos < 0) | |
10661 | { | |
10662 | clear_glyph_matrix (w->desired_matrix); | |
10663 | return -1; | |
10664 | } | |
10665 | } | |
10666 | ||
10667 | /* Don't let the cursor end in the scroll margins. */ | |
10668 | { | |
10669 | int this_scroll_margin, cursor_height; | |
10670 | ||
10671 | this_scroll_margin = max (0, scroll_margin); | |
10672 | this_scroll_margin = min (this_scroll_margin, | |
10673 | XFASTINT (w->height) / 4); | |
10674 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
10675 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
10676 | ||
10677 | if ((w->cursor.y < this_scroll_margin | |
10678 | && CHARPOS (start) > BEGV) | |
10679 | /* Don't take scroll margin into account at the bottom because | |
10680 | old redisplay didn't do it either. */ | |
10681 | || w->cursor.y + cursor_height > it.last_visible_y) | |
10682 | { | |
10683 | w->cursor.vpos = -1; | |
10684 | clear_glyph_matrix (w->desired_matrix); | |
10685 | return -1; | |
10686 | } | |
10687 | } | |
10688 | ||
10689 | /* Scroll the display. Do it before changing the current matrix so | |
10690 | that xterm.c doesn't get confused about where the cursor glyph is | |
10691 | found. */ | |
fa77249f | 10692 | if (dy && run.height) |
5f5c8ee5 GM |
10693 | { |
10694 | update_begin (f); | |
10695 | ||
10696 | if (FRAME_WINDOW_P (f)) | |
10697 | { | |
10698 | rif->update_window_begin_hook (w); | |
64d1e7d3 | 10699 | rif->clear_mouse_face (w); |
5f5c8ee5 | 10700 | rif->scroll_run_hook (w, &run); |
64d1e7d3 | 10701 | rif->update_window_end_hook (w, 0, 0); |
5f5c8ee5 GM |
10702 | } |
10703 | else | |
10704 | { | |
10705 | /* Terminal frame. In this case, dvpos gives the number of | |
10706 | lines to scroll by; dvpos < 0 means scroll up. */ | |
10707 | int first_unchanged_at_end_vpos | |
10708 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
10709 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
10710 | int end = XFASTINT (w->top) + window_internal_height (w); | |
10711 | ||
10712 | /* Perform the operation on the screen. */ | |
10713 | if (dvpos > 0) | |
10714 | { | |
10715 | /* Scroll last_unchanged_at_beg_row to the end of the | |
10716 | window down dvpos lines. */ | |
10717 | set_terminal_window (end); | |
10718 | ||
10719 | /* On dumb terminals delete dvpos lines at the end | |
10720 | before inserting dvpos empty lines. */ | |
10721 | if (!scroll_region_ok) | |
10722 | ins_del_lines (end - dvpos, -dvpos); | |
10723 | ||
10724 | /* Insert dvpos empty lines in front of | |
10725 | last_unchanged_at_beg_row. */ | |
10726 | ins_del_lines (from, dvpos); | |
10727 | } | |
10728 | else if (dvpos < 0) | |
10729 | { | |
10730 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
10731 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
10732 | set_terminal_window (end); | |
10733 | ||
10734 | /* Delete dvpos lines in front of | |
10735 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
10736 | the cursor to the given vpos and emit |dvpos| delete | |
10737 | line sequences. */ | |
10738 | ins_del_lines (from + dvpos, dvpos); | |
10739 | ||
10740 | /* On a dumb terminal insert dvpos empty lines at the | |
10741 | end. */ | |
10742 | if (!scroll_region_ok) | |
10743 | ins_del_lines (end + dvpos, -dvpos); | |
10744 | } | |
10745 | ||
10746 | set_terminal_window (0); | |
10747 | } | |
10748 | ||
10749 | update_end (f); | |
10750 | } | |
10751 | ||
ca42b2e8 GM |
10752 | /* Shift reused rows of the current matrix to the right position. |
10753 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
10754 | text. */ | |
10755 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
10756 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
10757 | if (dvpos < 0) |
10758 | { | |
10759 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
10760 | bottom_vpos, dvpos); | |
10761 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
10762 | bottom_vpos, 0); | |
10763 | } | |
10764 | else if (dvpos > 0) | |
10765 | { | |
10766 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
10767 | bottom_vpos, dvpos); | |
10768 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
10769 | first_unchanged_at_end_vpos + dvpos, 0); | |
10770 | } | |
10771 | ||
10772 | /* For frame-based redisplay, make sure that current frame and window | |
10773 | matrix are in sync with respect to glyph memory. */ | |
10774 | if (!FRAME_WINDOW_P (f)) | |
10775 | sync_frame_with_window_matrix_rows (w); | |
10776 | ||
10777 | /* Adjust buffer positions in reused rows. */ | |
10778 | if (delta) | |
f2d86d7a GM |
10779 | increment_matrix_positions (current_matrix, |
10780 | first_unchanged_at_end_vpos + dvpos, | |
10781 | bottom_vpos, delta, delta_bytes); | |
5f5c8ee5 GM |
10782 | |
10783 | /* Adjust Y positions. */ | |
10784 | if (dy) | |
10785 | shift_glyph_matrix (w, current_matrix, | |
10786 | first_unchanged_at_end_vpos + dvpos, | |
10787 | bottom_vpos, dy); | |
10788 | ||
10789 | if (first_unchanged_at_end_row) | |
10790 | first_unchanged_at_end_row += dvpos; | |
10791 | ||
10792 | /* If scrolling up, there may be some lines to display at the end of | |
10793 | the window. */ | |
10794 | last_text_row_at_end = NULL; | |
10795 | if (dy < 0) | |
10796 | { | |
10797 | /* Set last_row to the glyph row in the current matrix where the | |
10798 | window end line is found. It has been moved up or down in | |
10799 | the matrix by dvpos. */ | |
10800 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
10801 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
10802 | ||
10803 | /* If last_row is the window end line, it should display text. */ | |
10804 | xassert (last_row->displays_text_p); | |
10805 | ||
10806 | /* If window end line was partially visible before, begin | |
10807 | displaying at that line. Otherwise begin displaying with the | |
10808 | line following it. */ | |
10809 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
10810 | { | |
10811 | init_to_row_start (&it, w, last_row); | |
10812 | it.vpos = last_vpos; | |
10813 | it.current_y = last_row->y; | |
10814 | } | |
10815 | else | |
10816 | { | |
10817 | init_to_row_end (&it, w, last_row); | |
10818 | it.vpos = 1 + last_vpos; | |
10819 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
10820 | ++last_row; | |
10821 | } | |
12adba34 | 10822 | |
5f5c8ee5 GM |
10823 | /* We may start in a continuation line. If so, we have to get |
10824 | the right continuation_lines_width and current_x. */ | |
10825 | it.continuation_lines_width = last_row->continuation_lines_width; | |
10826 | it.hpos = it.current_x = 0; | |
10827 | ||
10828 | /* Display the rest of the lines at the window end. */ | |
10829 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10830 | while (it.current_y < it.last_visible_y | |
10831 | && !fonts_changed_p) | |
10832 | { | |
10833 | /* Is it always sure that the display agrees with lines in | |
10834 | the current matrix? I don't think so, so we mark rows | |
10835 | displayed invalid in the current matrix by setting their | |
10836 | enabled_p flag to zero. */ | |
10837 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
10838 | if (display_line (&it)) | |
10839 | last_text_row_at_end = it.glyph_row - 1; | |
10840 | } | |
10841 | } | |
12adba34 | 10842 | |
5f5c8ee5 GM |
10843 | /* Update window_end_pos and window_end_vpos. */ |
10844 | if (first_unchanged_at_end_row | |
10845 | && first_unchanged_at_end_row->y < it.last_visible_y | |
10846 | && !last_text_row_at_end) | |
10847 | { | |
10848 | /* Window end line if one of the preserved rows from the current | |
10849 | matrix. Set row to the last row displaying text in current | |
10850 | matrix starting at first_unchanged_at_end_row, after | |
10851 | scrolling. */ | |
10852 | xassert (first_unchanged_at_end_row->displays_text_p); | |
10853 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
10854 | first_unchanged_at_end_row); | |
10855 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
10856 | ||
10857 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
10858 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
10859 | XSETFASTINT (w->window_end_vpos, | |
10860 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
10861 | } | |
10862 | else if (last_text_row_at_end) | |
10863 | { | |
10864 | XSETFASTINT (w->window_end_pos, | |
10865 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
10866 | w->window_end_bytepos | |
10867 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
10868 | XSETFASTINT (w->window_end_vpos, | |
10869 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
10870 | } | |
10871 | else if (last_text_row) | |
10872 | { | |
10873 | /* We have displayed either to the end of the window or at the | |
10874 | end of the window, i.e. the last row with text is to be found | |
10875 | in the desired matrix. */ | |
10876 | XSETFASTINT (w->window_end_pos, | |
10877 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10878 | w->window_end_bytepos | |
10879 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
10880 | XSETFASTINT (w->window_end_vpos, | |
10881 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
10882 | } | |
10883 | else if (first_unchanged_at_end_row == NULL | |
10884 | && last_text_row == NULL | |
10885 | && last_text_row_at_end == NULL) | |
10886 | { | |
10887 | /* Displayed to end of window, but no line containing text was | |
10888 | displayed. Lines were deleted at the end of the window. */ | |
10889 | int vpos; | |
045dee35 | 10890 | int header_line_p = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
10891 | |
10892 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
045dee35 GM |
10893 | if ((w->desired_matrix->rows[vpos + header_line_p].enabled_p |
10894 | && w->desired_matrix->rows[vpos + header_line_p].displays_text_p) | |
10895 | || (!w->desired_matrix->rows[vpos + header_line_p].enabled_p | |
10896 | && w->current_matrix->rows[vpos + header_line_p].displays_text_p)) | |
5f5c8ee5 | 10897 | break; |
12adba34 | 10898 | |
5f5c8ee5 GM |
10899 | w->window_end_vpos = make_number (vpos); |
10900 | } | |
10901 | else | |
10902 | abort (); | |
10903 | ||
10904 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
10905 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 10906 | |
5f5c8ee5 GM |
10907 | /* Record that display has not been completed. */ |
10908 | w->window_end_valid = Qnil; | |
10909 | w->desired_matrix->no_scrolling_p = 1; | |
ef121659 | 10910 | return 3; |
12adba34 | 10911 | } |
0f9c0ff0 | 10912 | |
a2889657 | 10913 | |
5f5c8ee5 GM |
10914 | \f |
10915 | /*********************************************************************** | |
10916 | More debugging support | |
10917 | ***********************************************************************/ | |
a2889657 | 10918 | |
5f5c8ee5 | 10919 | #if GLYPH_DEBUG |
a2889657 | 10920 | |
5f5c8ee5 GM |
10921 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
10922 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 10923 | |
31b24551 | 10924 | |
5f5c8ee5 GM |
10925 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
10926 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 10927 | |
5f85fa4e | 10928 | static void |
5f5c8ee5 GM |
10929 | dump_glyph_matrix (matrix, with_glyphs_p) |
10930 | struct glyph_matrix *matrix; | |
10931 | int with_glyphs_p; | |
10932 | { | |
efc63ef0 | 10933 | int i; |
5f5c8ee5 GM |
10934 | for (i = 0; i < matrix->nrows; ++i) |
10935 | dump_glyph_row (matrix, i, with_glyphs_p); | |
10936 | } | |
31b24551 | 10937 | |
68a37fa8 | 10938 | |
5f5c8ee5 GM |
10939 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
10940 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 10941 | |
5f5c8ee5 GM |
10942 | void |
10943 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
10944 | struct glyph_matrix *matrix; | |
10945 | int vpos, with_glyphs_p; | |
10946 | { | |
10947 | struct glyph_row *row; | |
10948 | ||
10949 | if (vpos < 0 || vpos >= matrix->nrows) | |
10950 | return; | |
10951 | ||
10952 | row = MATRIX_ROW (matrix, vpos); | |
10953 | ||
b28cb6ed GM |
10954 | fprintf (stderr, "Row Start End Used oEI><O\\CTZFes X Y W H V A P\n"); |
10955 | fprintf (stderr, "=======================================================================\n"); | |
5f5c8ee5 | 10956 | |
ae26e27d GM |
10957 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d\ |
10958 | %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d %4d %4d %4d %4d\n", | |
5f5c8ee5 GM |
10959 | row - matrix->rows, |
10960 | MATRIX_ROW_START_CHARPOS (row), | |
10961 | MATRIX_ROW_END_CHARPOS (row), | |
10962 | row->used[TEXT_AREA], | |
10963 | row->contains_overlapping_glyphs_p, | |
10964 | row->enabled_p, | |
10965 | row->inverse_p, | |
10966 | row->truncated_on_left_p, | |
10967 | row->truncated_on_right_p, | |
10968 | row->overlay_arrow_p, | |
10969 | row->continued_p, | |
10970 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
10971 | row->displays_text_p, | |
10972 | row->ends_at_zv_p, | |
10973 | row->fill_line_p, | |
91004049 GM |
10974 | row->ends_in_middle_of_char_p, |
10975 | row->starts_in_middle_of_char_p, | |
5f5c8ee5 GM |
10976 | row->x, |
10977 | row->y, | |
b28cb6ed GM |
10978 | row->pixel_width, |
10979 | row->height, | |
10980 | row->visible_height, | |
10981 | row->ascent, | |
10982 | row->phys_ascent); | |
5f5c8ee5 GM |
10983 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, |
10984 | row->end.overlay_string_index); | |
10985 | fprintf (stderr, "%9d %5d\n", | |
10986 | CHARPOS (row->start.string_pos), | |
10987 | CHARPOS (row->end.string_pos)); | |
10988 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
10989 | row->end.dpvec_index); | |
10990 | ||
10991 | if (with_glyphs_p) | |
bd66d1ba | 10992 | { |
5f5c8ee5 GM |
10993 | struct glyph *glyph, *glyph_end; |
10994 | int prev_had_glyphs_p; | |
10995 | ||
10996 | glyph = row->glyphs[TEXT_AREA]; | |
10997 | glyph_end = glyph + row->used[TEXT_AREA]; | |
10998 | ||
10999 | /* Glyph for a line end in text. */ | |
11000 | if (glyph == glyph_end && glyph->charpos > 0) | |
11001 | ++glyph_end; | |
11002 | ||
11003 | if (glyph < glyph_end) | |
bd66d1ba | 11004 | { |
06568bbf | 11005 | fprintf (stderr, " Glyph Type Pos O W Code C Face LR\n"); |
5f5c8ee5 | 11006 | prev_had_glyphs_p = 1; |
bd66d1ba RS |
11007 | } |
11008 | else | |
5f5c8ee5 GM |
11009 | prev_had_glyphs_p = 0; |
11010 | ||
11011 | while (glyph < glyph_end) | |
f7b4b63a | 11012 | { |
5f5c8ee5 GM |
11013 | if (glyph->type == CHAR_GLYPH) |
11014 | { | |
11015 | fprintf (stderr, | |
06568bbf | 11016 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", |
5f5c8ee5 GM |
11017 | glyph - row->glyphs[TEXT_AREA], |
11018 | 'C', | |
11019 | glyph->charpos, | |
06568bbf GM |
11020 | (BUFFERP (glyph->object) |
11021 | ? 'B' | |
11022 | : (STRINGP (glyph->object) | |
11023 | ? 'S' | |
11024 | : '-')), | |
5f5c8ee5 | 11025 | glyph->pixel_width, |
43d120d8 KH |
11026 | glyph->u.ch, |
11027 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
11028 | ? glyph->u.ch | |
5f5c8ee5 | 11029 | : '.'), |
43d120d8 | 11030 | glyph->face_id, |
5f5c8ee5 GM |
11031 | glyph->left_box_line_p, |
11032 | glyph->right_box_line_p); | |
11033 | } | |
11034 | else if (glyph->type == STRETCH_GLYPH) | |
11035 | { | |
11036 | fprintf (stderr, | |
06568bbf | 11037 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", |
5f5c8ee5 GM |
11038 | glyph - row->glyphs[TEXT_AREA], |
11039 | 'S', | |
11040 | glyph->charpos, | |
06568bbf GM |
11041 | (BUFFERP (glyph->object) |
11042 | ? 'B' | |
11043 | : (STRINGP (glyph->object) | |
11044 | ? 'S' | |
11045 | : '-')), | |
5f5c8ee5 GM |
11046 | glyph->pixel_width, |
11047 | 0, | |
11048 | '.', | |
bcdda9a4 | 11049 | glyph->face_id, |
5f5c8ee5 GM |
11050 | glyph->left_box_line_p, |
11051 | glyph->right_box_line_p); | |
11052 | } | |
11053 | else if (glyph->type == IMAGE_GLYPH) | |
11054 | { | |
11055 | fprintf (stderr, | |
06568bbf | 11056 | " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n", |
5f5c8ee5 GM |
11057 | glyph - row->glyphs[TEXT_AREA], |
11058 | 'I', | |
11059 | glyph->charpos, | |
06568bbf GM |
11060 | (BUFFERP (glyph->object) |
11061 | ? 'B' | |
11062 | : (STRINGP (glyph->object) | |
11063 | ? 'S' | |
11064 | : '-')), | |
5f5c8ee5 | 11065 | glyph->pixel_width, |
43d120d8 | 11066 | glyph->u.img_id, |
5f5c8ee5 | 11067 | '.', |
bcdda9a4 | 11068 | glyph->face_id, |
5f5c8ee5 GM |
11069 | glyph->left_box_line_p, |
11070 | glyph->right_box_line_p); | |
11071 | } | |
11072 | ++glyph; | |
f7b4b63a | 11073 | } |
f4faa47c | 11074 | } |
5f5c8ee5 | 11075 | } |
f4faa47c | 11076 | |
a2889657 | 11077 | |
5f5c8ee5 GM |
11078 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
11079 | Sdump_glyph_matrix, 0, 1, "p", | |
11080 | "Dump the current matrix of the selected window to stderr.\n\ | |
11081 | Shows contents of glyph row structures. With non-nil optional\n\ | |
11082 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
11083 | (with_glyphs_p) | |
02513cdd | 11084 | Lisp_Object with_glyphs_p; |
5f5c8ee5 GM |
11085 | { |
11086 | struct window *w = XWINDOW (selected_window); | |
11087 | struct buffer *buffer = XBUFFER (w->buffer); | |
11088 | ||
11089 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
11090 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
11091 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
11092 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
11093 | fprintf (stderr, "=============================================\n"); | |
11094 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
11095 | return Qnil; | |
11096 | } | |
1c2250c2 | 11097 | |
1fca3fae | 11098 | |
5f5c8ee5 GM |
11099 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
11100 | "Dump glyph row ROW to stderr.") | |
11101 | (row) | |
11102 | Lisp_Object row; | |
11103 | { | |
11104 | CHECK_NUMBER (row, 0); | |
11105 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
11106 | return Qnil; | |
11107 | } | |
1fca3fae | 11108 | |
67481ae5 | 11109 | |
e037b9ec | 11110 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, |
5f5c8ee5 GM |
11111 | 0, 0, "", "") |
11112 | () | |
11113 | { | |
886bd6f2 GM |
11114 | struct frame *sf = SELECTED_FRAME (); |
11115 | struct glyph_matrix *m = (XWINDOW (sf->tool_bar_window) | |
5f5c8ee5 GM |
11116 | ->current_matrix); |
11117 | dump_glyph_row (m, 0, 1); | |
11118 | return Qnil; | |
11119 | } | |
ca26e1c8 | 11120 | |
0f9c0ff0 | 11121 | |
5f5c8ee5 GM |
11122 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
11123 | Strace_redisplay_toggle, 0, 0, "", | |
11124 | "Toggle tracing of redisplay.") | |
11125 | () | |
11126 | { | |
11127 | trace_redisplay_p = !trace_redisplay_p; | |
11128 | return Qnil; | |
11129 | } | |
bf9249e3 GM |
11130 | |
11131 | ||
11132 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, 1, "", | |
11133 | "Print STRING to stderr.") | |
11134 | (string) | |
11135 | Lisp_Object string; | |
11136 | { | |
11137 | CHECK_STRING (string, 0); | |
11138 | fprintf (stderr, "%s", XSTRING (string)->data); | |
11139 | return Qnil; | |
11140 | } | |
5f5c8ee5 GM |
11141 | |
11142 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 11143 | |
ca26e1c8 | 11144 | |
5f5c8ee5 GM |
11145 | \f |
11146 | /*********************************************************************** | |
11147 | Building Desired Matrix Rows | |
11148 | ***********************************************************************/ | |
a2889657 | 11149 | |
5f5c8ee5 GM |
11150 | /* Return a temporary glyph row holding the glyphs of an overlay |
11151 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 11152 | |
5f5c8ee5 GM |
11153 | static struct glyph_row * |
11154 | get_overlay_arrow_glyph_row (w) | |
11155 | struct window *w; | |
11156 | { | |
11157 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
11158 | struct buffer *buffer = XBUFFER (w->buffer); | |
11159 | struct buffer *old = current_buffer; | |
11160 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
11161 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
11162 | unsigned char *arrow_end = arrow_string + arrow_len; | |
11163 | unsigned char *p; | |
11164 | struct it it; | |
11165 | int multibyte_p; | |
11166 | int n_glyphs_before; | |
11167 | ||
11168 | set_buffer_temp (buffer); | |
11169 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
11170 | it.glyph_row->used[TEXT_AREA] = 0; | |
11171 | SET_TEXT_POS (it.position, 0, 0); | |
11172 | ||
11173 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
11174 | p = arrow_string; | |
11175 | while (p < arrow_end) | |
11176 | { | |
11177 | Lisp_Object face, ilisp; | |
11178 | ||
11179 | /* Get the next character. */ | |
11180 | if (multibyte_p) | |
4fdb80f2 | 11181 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
11182 | else |
11183 | it.c = *p, it.len = 1; | |
11184 | p += it.len; | |
11185 | ||
11186 | /* Get its face. */ | |
11187 | XSETFASTINT (ilisp, p - arrow_string); | |
11188 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
11189 | it.face_id = compute_char_face (f, it.c, face); | |
11190 | ||
11191 | /* Compute its width, get its glyphs. */ | |
11192 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 11193 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
11194 | PRODUCE_GLYPHS (&it); |
11195 | ||
11196 | /* If this character doesn't fit any more in the line, we have | |
11197 | to remove some glyphs. */ | |
11198 | if (it.current_x > it.last_visible_x) | |
11199 | { | |
11200 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
11201 | break; | |
11202 | } | |
11203 | } | |
11204 | ||
11205 | set_buffer_temp (old); | |
11206 | return it.glyph_row; | |
11207 | } | |
ca26e1c8 | 11208 | |
b0a0fbda | 11209 | |
5f5c8ee5 GM |
11210 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
11211 | glyphs are only inserted for terminal frames since we can't really | |
11212 | win with truncation glyphs when partially visible glyphs are | |
11213 | involved. Which glyphs to insert is determined by | |
11214 | produce_special_glyphs. */ | |
67481ae5 | 11215 | |
5f5c8ee5 GM |
11216 | static void |
11217 | insert_left_trunc_glyphs (it) | |
11218 | struct it *it; | |
11219 | { | |
11220 | struct it truncate_it; | |
11221 | struct glyph *from, *end, *to, *toend; | |
11222 | ||
11223 | xassert (!FRAME_WINDOW_P (it->f)); | |
11224 | ||
11225 | /* Get the truncation glyphs. */ | |
11226 | truncate_it = *it; | |
5f5c8ee5 GM |
11227 | truncate_it.current_x = 0; |
11228 | truncate_it.face_id = DEFAULT_FACE_ID; | |
11229 | truncate_it.glyph_row = &scratch_glyph_row; | |
11230 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
11231 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
6fc556fd | 11232 | truncate_it.object = make_number (0); |
5f5c8ee5 GM |
11233 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); |
11234 | ||
11235 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
11236 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
11237 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
11238 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
11239 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
11240 | ||
11241 | while (from < end) | |
11242 | *to++ = *from++; | |
11243 | ||
11244 | /* There may be padding glyphs left over. Remove them. */ | |
11245 | from = to; | |
11246 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
11247 | ++from; | |
11248 | while (from < toend) | |
11249 | *to++ = *from++; | |
11250 | ||
11251 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
11252 | } | |
e0bfbde6 | 11253 | |
e0bfbde6 | 11254 | |
5f5c8ee5 | 11255 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 11256 | |
5f5c8ee5 GM |
11257 | Most of the time, ascent and height of a display line will be equal |
11258 | to the max_ascent and max_height values of the display iterator | |
11259 | structure. This is not the case if | |
67481ae5 | 11260 | |
5f5c8ee5 GM |
11261 | 1. We hit ZV without displaying anything. In this case, max_ascent |
11262 | and max_height will be zero. | |
1c9241f5 | 11263 | |
5f5c8ee5 GM |
11264 | 2. We have some glyphs that don't contribute to the line height. |
11265 | (The glyph row flag contributes_to_line_height_p is for future | |
11266 | pixmap extensions). | |
f6fd109b | 11267 | |
5f5c8ee5 GM |
11268 | The first case is easily covered by using default values because in |
11269 | these cases, the line height does not really matter, except that it | |
11270 | must not be zero. */ | |
67481ae5 | 11271 | |
5f5c8ee5 GM |
11272 | static void |
11273 | compute_line_metrics (it) | |
11274 | struct it *it; | |
11275 | { | |
11276 | struct glyph_row *row = it->glyph_row; | |
11277 | int area, i; | |
1c2250c2 | 11278 | |
5f5c8ee5 GM |
11279 | if (FRAME_WINDOW_P (it->f)) |
11280 | { | |
045dee35 | 11281 | int i, header_line_height; |
1c2250c2 | 11282 | |
5f5c8ee5 GM |
11283 | /* The line may consist of one space only, that was added to |
11284 | place the cursor on it. If so, the row's height hasn't been | |
11285 | computed yet. */ | |
11286 | if (row->height == 0) | |
11287 | { | |
11288 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 11289 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
11290 | row->ascent = it->max_ascent; |
11291 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
11292 | row->phys_ascent = it->max_phys_ascent; |
11293 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
11294 | } |
11295 | ||
11296 | /* Compute the width of this line. */ | |
11297 | row->pixel_width = row->x; | |
11298 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
11299 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
11300 | ||
11301 | xassert (row->pixel_width >= 0); | |
11302 | xassert (row->ascent >= 0 && row->height > 0); | |
11303 | ||
312246d1 GM |
11304 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
11305 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
11306 | ||
11307 | /* If first line's physical ascent is larger than its logical | |
11308 | ascent, use the physical ascent, and make the row taller. | |
11309 | This makes accented characters fully visible. */ | |
b28cb6ed | 11310 | if (row == MATRIX_FIRST_TEXT_ROW (it->w->desired_matrix) |
312246d1 GM |
11311 | && row->phys_ascent > row->ascent) |
11312 | { | |
11313 | row->height += row->phys_ascent - row->ascent; | |
11314 | row->ascent = row->phys_ascent; | |
11315 | } | |
11316 | ||
5f5c8ee5 GM |
11317 | /* Compute how much of the line is visible. */ |
11318 | row->visible_height = row->height; | |
11319 | ||
045dee35 GM |
11320 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
11321 | if (row->y < header_line_height) | |
11322 | row->visible_height -= header_line_height - row->y; | |
5f5c8ee5 GM |
11323 | else |
11324 | { | |
11325 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
11326 | if (row->y + row->height > max_y) | |
11327 | row->visible_height -= row->y + row->height - max_y; | |
11328 | } | |
11329 | } | |
11330 | else | |
11331 | { | |
11332 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
11333 | row->ascent = row->phys_ascent = 0; |
11334 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 11335 | } |
67481ae5 | 11336 | |
5f5c8ee5 GM |
11337 | /* Compute a hash code for this row. */ |
11338 | row->hash = 0; | |
11339 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
11340 | for (i = 0; i < row->used[area]; ++i) | |
11341 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
11342 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
11343 | + row->glyphs[area][i].face_id |
11344 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 11345 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 11346 | |
5f5c8ee5 | 11347 | it->max_ascent = it->max_descent = 0; |
312246d1 | 11348 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 11349 | } |
12adba34 | 11350 | |
ca26e1c8 | 11351 | |
5f5c8ee5 GM |
11352 | /* Append one space to the glyph row of iterator IT if doing a |
11353 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
11354 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 11355 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
11356 | |
11357 | This function is called to make sure that there is always one glyph | |
11358 | at the end of a glyph row that the cursor can be set on under | |
11359 | window-systems. (If there weren't such a glyph we would not know | |
11360 | how wide and tall a box cursor should be displayed). | |
11361 | ||
11362 | At the same time this space let's a nicely handle clearing to the | |
11363 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 11364 | |
80c6cb1f | 11365 | static int |
5f5c8ee5 GM |
11366 | append_space (it, default_face_p) |
11367 | struct it *it; | |
11368 | int default_face_p; | |
11369 | { | |
11370 | if (FRAME_WINDOW_P (it->f)) | |
11371 | { | |
11372 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 11373 | |
5f5c8ee5 GM |
11374 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
11375 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 11376 | { |
5f5c8ee5 GM |
11377 | /* Save some values that must not be changed. */ |
11378 | int saved_x = it->current_x; | |
11379 | struct text_pos saved_pos; | |
11380 | int saved_what = it->what; | |
11381 | int saved_face_id = it->face_id; | |
5f5c8ee5 | 11382 | Lisp_Object saved_object; |
980806b6 | 11383 | struct face *face; |
5f5c8ee5 GM |
11384 | |
11385 | saved_object = it->object; | |
11386 | saved_pos = it->position; | |
11387 | ||
11388 | it->what = IT_CHARACTER; | |
11389 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 11390 | it->object = make_number (0); |
5f5c8ee5 GM |
11391 | it->c = ' '; |
11392 | it->len = 1; | |
5f5c8ee5 GM |
11393 | |
11394 | if (default_face_p) | |
11395 | it->face_id = DEFAULT_FACE_ID; | |
980806b6 KH |
11396 | face = FACE_FROM_ID (it->f, it->face_id); |
11397 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 11398 | |
5f5c8ee5 GM |
11399 | PRODUCE_GLYPHS (it); |
11400 | ||
11401 | it->current_x = saved_x; | |
11402 | it->object = saved_object; | |
11403 | it->position = saved_pos; | |
11404 | it->what = saved_what; | |
11405 | it->face_id = saved_face_id; | |
80c6cb1f | 11406 | return 1; |
5f5c8ee5 GM |
11407 | } |
11408 | } | |
80c6cb1f GM |
11409 | |
11410 | return 0; | |
5f5c8ee5 | 11411 | } |
12adba34 | 11412 | |
1842fc1a | 11413 | |
5f5c8ee5 GM |
11414 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
11415 | to the end of the display line. Called from display_line. | |
11416 | If the glyph row is empty, add a space glyph to it so that we | |
11417 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
11418 | ||
11419 | static void | |
11420 | extend_face_to_end_of_line (it) | |
11421 | struct it *it; | |
11422 | { | |
11423 | struct face *face; | |
11424 | struct frame *f = it->f; | |
1842fc1a | 11425 | |
5f5c8ee5 GM |
11426 | /* If line is already filled, do nothing. */ |
11427 | if (it->current_x >= it->last_visible_x) | |
11428 | return; | |
11429 | ||
11430 | /* Face extension extends the background and box of IT->face_id | |
11431 | to the end of the line. If the background equals the background | |
11432 | of the frame, we haven't to do anything. */ | |
11433 | face = FACE_FROM_ID (f, it->face_id); | |
11434 | if (FRAME_WINDOW_P (f) | |
11435 | && face->box == FACE_NO_BOX | |
11436 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
11437 | && !face->stipple) | |
11438 | return; | |
1842fc1a | 11439 | |
5f5c8ee5 GM |
11440 | /* Set the glyph row flag indicating that the face of the last glyph |
11441 | in the text area has to be drawn to the end of the text area. */ | |
11442 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 11443 | |
980806b6 KH |
11444 | /* If current character of IT is not ASCII, make sure we have the |
11445 | ASCII face. This will be automatically undone the next time | |
11446 | get_next_display_element returns a multibyte character. Note | |
11447 | that the character will always be single byte in unibyte text. */ | |
11448 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 11449 | { |
980806b6 | 11450 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 11451 | } |
545e04f6 | 11452 | |
5f5c8ee5 GM |
11453 | if (FRAME_WINDOW_P (f)) |
11454 | { | |
11455 | /* If the row is empty, add a space with the current face of IT, | |
11456 | so that we know which face to draw. */ | |
11457 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 11458 | { |
5f5c8ee5 | 11459 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 11460 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 11461 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 11462 | } |
5f5c8ee5 GM |
11463 | } |
11464 | else | |
11465 | { | |
11466 | /* Save some values that must not be changed. */ | |
11467 | int saved_x = it->current_x; | |
11468 | struct text_pos saved_pos; | |
11469 | Lisp_Object saved_object; | |
11470 | int saved_what = it->what; | |
11471 | ||
11472 | saved_object = it->object; | |
11473 | saved_pos = it->position; | |
11474 | ||
11475 | it->what = IT_CHARACTER; | |
11476 | bzero (&it->position, sizeof it->position); | |
6fc556fd | 11477 | it->object = make_number (0); |
5f5c8ee5 GM |
11478 | it->c = ' '; |
11479 | it->len = 1; | |
11480 | ||
11481 | PRODUCE_GLYPHS (it); | |
11482 | ||
11483 | while (it->current_x <= it->last_visible_x) | |
11484 | PRODUCE_GLYPHS (it); | |
11485 | ||
11486 | /* Don't count these blanks really. It would let us insert a left | |
11487 | truncation glyph below and make us set the cursor on them, maybe. */ | |
11488 | it->current_x = saved_x; | |
11489 | it->object = saved_object; | |
11490 | it->position = saved_pos; | |
11491 | it->what = saved_what; | |
11492 | } | |
11493 | } | |
12adba34 | 11494 | |
545e04f6 | 11495 | |
5f5c8ee5 GM |
11496 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
11497 | trailing whitespace. */ | |
1c9241f5 | 11498 | |
5f5c8ee5 GM |
11499 | static int |
11500 | trailing_whitespace_p (charpos) | |
11501 | int charpos; | |
11502 | { | |
11503 | int bytepos = CHAR_TO_BYTE (charpos); | |
11504 | int c = 0; | |
7bbe686f | 11505 | |
5f5c8ee5 GM |
11506 | while (bytepos < ZV_BYTE |
11507 | && (c = FETCH_CHAR (bytepos), | |
11508 | c == ' ' || c == '\t')) | |
11509 | ++bytepos; | |
0d09d1e6 | 11510 | |
8f897821 GM |
11511 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
11512 | { | |
11513 | if (bytepos != PT_BYTE) | |
11514 | return 1; | |
11515 | } | |
11516 | return 0; | |
5f5c8ee5 | 11517 | } |
31b24551 | 11518 | |
545e04f6 | 11519 | |
5f5c8ee5 | 11520 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 11521 | |
5f5c8ee5 GM |
11522 | void |
11523 | highlight_trailing_whitespace (f, row) | |
11524 | struct frame *f; | |
11525 | struct glyph_row *row; | |
11526 | { | |
11527 | int used = row->used[TEXT_AREA]; | |
11528 | ||
11529 | if (used) | |
11530 | { | |
11531 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
11532 | struct glyph *glyph = start + used - 1; | |
11533 | ||
11534 | /* Skip over the space glyph inserted to display the | |
11535 | cursor at the end of a line. */ | |
11536 | if (glyph->type == CHAR_GLYPH | |
43d120d8 | 11537 | && glyph->u.ch == ' ' |
6fc556fd | 11538 | && INTEGERP (glyph->object)) |
5f5c8ee5 GM |
11539 | --glyph; |
11540 | ||
11541 | /* If last glyph is a space or stretch, and it's trailing | |
11542 | whitespace, set the face of all trailing whitespace glyphs in | |
11543 | IT->glyph_row to `trailing-whitespace'. */ | |
11544 | if (glyph >= start | |
11545 | && BUFFERP (glyph->object) | |
11546 | && (glyph->type == STRETCH_GLYPH | |
11547 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 11548 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 11549 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 11550 | { |
980806b6 | 11551 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
5f5c8ee5 GM |
11552 | |
11553 | while (glyph >= start | |
11554 | && BUFFERP (glyph->object) | |
11555 | && (glyph->type == STRETCH_GLYPH | |
11556 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
11557 | && glyph->u.ch == ' '))) |
11558 | (glyph--)->face_id = face_id; | |
545e04f6 | 11559 | } |
a2889657 | 11560 | } |
5f5c8ee5 | 11561 | } |
a2889657 | 11562 | |
5fcbb24d | 11563 | |
5f5c8ee5 GM |
11564 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
11565 | IT->w from text at the current position of IT. See dispextern.h | |
11566 | for an overview of struct it. Value is non-zero if | |
11567 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
11568 | only. */ | |
11569 | ||
11570 | static int | |
11571 | display_line (it) | |
11572 | struct it *it; | |
11573 | { | |
11574 | struct glyph_row *row = it->glyph_row; | |
11575 | ||
11576 | /* We always start displaying at hpos zero even if hscrolled. */ | |
11577 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 11578 | |
5f5c8ee5 GM |
11579 | /* We must not display in a row that's not a text row. */ |
11580 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
11581 | < it->w->desired_matrix->nrows); | |
12adba34 | 11582 | |
5f5c8ee5 GM |
11583 | /* Is IT->w showing the region? */ |
11584 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 11585 | |
5f5c8ee5 GM |
11586 | /* Clear the result glyph row and enable it. */ |
11587 | prepare_desired_row (row); | |
12adba34 | 11588 | |
5f5c8ee5 GM |
11589 | row->y = it->current_y; |
11590 | row->start = it->current; | |
11591 | row->continuation_lines_width = it->continuation_lines_width; | |
11592 | row->displays_text_p = 1; | |
91004049 GM |
11593 | row->starts_in_middle_of_char_p = it->starts_in_middle_of_char_p; |
11594 | it->starts_in_middle_of_char_p = 0; | |
5f5c8ee5 GM |
11595 | |
11596 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
11597 | display_line on only one line at a time, in which case this | |
11598 | can't really hurt too much, or we call it on lines which appear | |
11599 | one after another in the buffer, in which case all calls to | |
11600 | recenter_overlay_lists but the first will be pretty cheap. */ | |
11601 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
11602 | ||
5f5c8ee5 GM |
11603 | /* Move over display elements that are not visible because we are |
11604 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
11605 | if the first glyph is partially visible or if we hit a line end. */ | |
11606 | if (it->current_x < it->first_visible_x) | |
11607 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
11608 | MOVE_TO_POS | MOVE_TO_X); | |
11609 | ||
11610 | /* Get the initial row height. This is either the height of the | |
11611 | text hscrolled, if there is any, or zero. */ | |
11612 | row->ascent = it->max_ascent; | |
11613 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
11614 | row->phys_ascent = it->max_phys_ascent; |
11615 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
11616 | |
11617 | /* Loop generating characters. The loop is left with IT on the next | |
11618 | character to display. */ | |
11619 | while (1) | |
11620 | { | |
11621 | int n_glyphs_before, hpos_before, x_before; | |
11622 | int x, i, nglyphs; | |
ae26e27d | 11623 | int ascent = 0, descent = 0, phys_ascent = 0, phys_descent = 0; |
b28cb6ed | 11624 | |
5f5c8ee5 GM |
11625 | /* Retrieve the next thing to display. Value is zero if end of |
11626 | buffer reached. */ | |
11627 | if (!get_next_display_element (it)) | |
11628 | { | |
11629 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
11630 | display the cursor there under X. Set the charpos of the |
11631 | first glyph of blank lines not corresponding to any text | |
11632 | to -1. */ | |
11633 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
11634 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 11635 | { |
5f5c8ee5 GM |
11636 | row->glyphs[TEXT_AREA]->charpos = -1; |
11637 | row->displays_text_p = 0; | |
11638 | ||
11639 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
11640 | row->indicate_empty_line_p = 1; | |
a2889657 | 11641 | } |
5f5c8ee5 GM |
11642 | |
11643 | it->continuation_lines_width = 0; | |
11644 | row->ends_at_zv_p = 1; | |
11645 | break; | |
a2889657 | 11646 | } |
a2889657 | 11647 | |
5f5c8ee5 GM |
11648 | /* Now, get the metrics of what we want to display. This also |
11649 | generates glyphs in `row' (which is IT->glyph_row). */ | |
11650 | n_glyphs_before = row->used[TEXT_AREA]; | |
11651 | x = it->current_x; | |
e6819faf GM |
11652 | |
11653 | /* Remember the line height so far in case the next element doesn't | |
11654 | fit on the line. */ | |
11655 | if (!it->truncate_lines_p) | |
11656 | { | |
11657 | ascent = it->max_ascent; | |
11658 | descent = it->max_descent; | |
11659 | phys_ascent = it->max_phys_ascent; | |
11660 | phys_descent = it->max_phys_descent; | |
11661 | } | |
11662 | ||
5f5c8ee5 | 11663 | PRODUCE_GLYPHS (it); |
a2889657 | 11664 | |
5f5c8ee5 GM |
11665 | /* If this display element was in marginal areas, continue with |
11666 | the next one. */ | |
11667 | if (it->area != TEXT_AREA) | |
a2889657 | 11668 | { |
5f5c8ee5 GM |
11669 | row->ascent = max (row->ascent, it->max_ascent); |
11670 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11671 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11672 | row->phys_height = max (row->phys_height, | |
11673 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11674 | set_iterator_to_next (it); |
11675 | continue; | |
11676 | } | |
5936754e | 11677 | |
5f5c8ee5 GM |
11678 | /* Does the display element fit on the line? If we truncate |
11679 | lines, we should draw past the right edge of the window. If | |
11680 | we don't truncate, we want to stop so that we can display the | |
11681 | continuation glyph before the right margin. If lines are | |
11682 | continued, there are two possible strategies for characters | |
11683 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
11684 | glyphs as possible in this line and leave the rest for the | |
11685 | continuation line, or display the whole element in the next | |
11686 | line. Original redisplay did the former, so we do it also. */ | |
11687 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
11688 | hpos_before = it->hpos; | |
11689 | x_before = x; | |
11690 | ||
11691 | if (nglyphs == 1 | |
11692 | && it->current_x < it->last_visible_x) | |
11693 | { | |
11694 | ++it->hpos; | |
11695 | row->ascent = max (row->ascent, it->max_ascent); | |
11696 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11697 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11698 | row->phys_height = max (row->phys_height, | |
11699 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11700 | if (it->current_x - it->pixel_width < it->first_visible_x) |
11701 | row->x = x - it->first_visible_x; | |
11702 | } | |
11703 | else | |
11704 | { | |
11705 | int new_x; | |
11706 | struct glyph *glyph; | |
11707 | ||
11708 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 11709 | { |
5f5c8ee5 GM |
11710 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
11711 | new_x = x + glyph->pixel_width; | |
11712 | ||
11713 | if (/* Lines are continued. */ | |
11714 | !it->truncate_lines_p | |
11715 | && (/* Glyph doesn't fit on the line. */ | |
11716 | new_x > it->last_visible_x | |
11717 | /* Or it fits exactly on a window system frame. */ | |
11718 | || (new_x == it->last_visible_x | |
11719 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 11720 | { |
5f5c8ee5 GM |
11721 | /* End of a continued line. */ |
11722 | ||
11723 | if (it->hpos == 0 | |
11724 | || (new_x == it->last_visible_x | |
11725 | && FRAME_WINDOW_P (it->f))) | |
11726 | { | |
e6819faf GM |
11727 | /* Current glyph is the only one on the line or |
11728 | fits exactly on the line. We must continue | |
11729 | the line because we can't draw the cursor | |
11730 | after the glyph. */ | |
5f5c8ee5 GM |
11731 | row->continued_p = 1; |
11732 | it->current_x = new_x; | |
11733 | it->continuation_lines_width += new_x; | |
11734 | ++it->hpos; | |
11735 | if (i == nglyphs - 1) | |
11736 | set_iterator_to_next (it); | |
11737 | } | |
3b3c4bf0 GM |
11738 | else if (CHAR_GLYPH_PADDING_P (*glyph) |
11739 | && !FRAME_WINDOW_P (it->f)) | |
11740 | { | |
11741 | /* A padding glyph that doesn't fit on this line. | |
11742 | This means the whole character doesn't fit | |
11743 | on the line. */ | |
11744 | row->used[TEXT_AREA] = n_glyphs_before; | |
11745 | ||
11746 | /* Fill the rest of the row with continuation | |
11747 | glyphs like in 20.x. */ | |
11748 | while (row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] | |
11749 | < row->glyphs[1 + TEXT_AREA]) | |
11750 | produce_special_glyphs (it, IT_CONTINUATION); | |
11751 | ||
11752 | row->continued_p = 1; | |
11753 | it->current_x = x_before; | |
11754 | it->continuation_lines_width += x_before; | |
11755 | ||
11756 | /* Restore the height to what it was before the | |
11757 | element not fitting on the line. */ | |
11758 | it->max_ascent = ascent; | |
11759 | it->max_descent = descent; | |
11760 | it->max_phys_ascent = phys_ascent; | |
11761 | it->max_phys_descent = phys_descent; | |
11762 | } | |
5f5c8ee5 | 11763 | else |
5936754e | 11764 | { |
5f5c8ee5 GM |
11765 | /* Display element draws past the right edge of |
11766 | the window. Restore positions to values | |
11767 | before the element. The next line starts | |
11768 | with current_x before the glyph that could | |
11769 | not be displayed, so that TAB works right. */ | |
11770 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
11771 | ||
11772 | /* Display continuation glyphs. */ | |
11773 | if (!FRAME_WINDOW_P (it->f)) | |
11774 | produce_special_glyphs (it, IT_CONTINUATION); | |
11775 | row->continued_p = 1; | |
11776 | ||
11777 | it->current_x = x; | |
11778 | it->continuation_lines_width += x; | |
91004049 GM |
11779 | if (nglyphs > 1 && i > 0) |
11780 | { | |
11781 | row->ends_in_middle_of_char_p = 1; | |
11782 | it->starts_in_middle_of_char_p = 1; | |
11783 | } | |
e6819faf GM |
11784 | |
11785 | /* Restore the height to what it was before the | |
11786 | element not fitting on the line. */ | |
11787 | it->max_ascent = ascent; | |
11788 | it->max_descent = descent; | |
11789 | it->max_phys_ascent = phys_ascent; | |
11790 | it->max_phys_descent = phys_descent; | |
5936754e | 11791 | } |
e6819faf | 11792 | |
5f5c8ee5 GM |
11793 | break; |
11794 | } | |
11795 | else if (new_x > it->first_visible_x) | |
11796 | { | |
11797 | /* Increment number of glyphs actually displayed. */ | |
11798 | ++it->hpos; | |
11799 | ||
11800 | if (x < it->first_visible_x) | |
11801 | /* Glyph is partially visible, i.e. row starts at | |
11802 | negative X position. */ | |
11803 | row->x = x - it->first_visible_x; | |
11804 | } | |
11805 | else | |
11806 | { | |
11807 | /* Glyph is completely off the left margin of the | |
11808 | window. This should not happen because of the | |
11809 | move_it_in_display_line at the start of | |
11810 | this function. */ | |
11811 | abort (); | |
a2889657 | 11812 | } |
a2889657 | 11813 | } |
5f5c8ee5 GM |
11814 | |
11815 | row->ascent = max (row->ascent, it->max_ascent); | |
11816 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11817 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11818 | row->phys_height = max (row->phys_height, | |
11819 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11820 | |
11821 | /* End of this display line if row is continued. */ | |
11822 | if (row->continued_p) | |
11823 | break; | |
a2889657 | 11824 | } |
a2889657 | 11825 | |
5f5c8ee5 GM |
11826 | /* Is this a line end? If yes, we're also done, after making |
11827 | sure that a non-default face is extended up to the right | |
11828 | margin of the window. */ | |
11829 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 11830 | { |
5f5c8ee5 GM |
11831 | int used_before = row->used[TEXT_AREA]; |
11832 | ||
11833 | /* Add a space at the end of the line that is used to | |
11834 | display the cursor there. */ | |
11835 | append_space (it, 0); | |
11836 | ||
11837 | /* Extend the face to the end of the line. */ | |
11838 | extend_face_to_end_of_line (it); | |
11839 | ||
11840 | /* Make sure we have the position. */ | |
11841 | if (used_before == 0) | |
11842 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
11843 | ||
11844 | /* Consume the line end. This skips over invisible lines. */ | |
11845 | set_iterator_to_next (it); | |
11846 | it->continuation_lines_width = 0; | |
11847 | break; | |
1c9241f5 | 11848 | } |
a2889657 | 11849 | |
5f5c8ee5 GM |
11850 | /* Proceed with next display element. Note that this skips |
11851 | over lines invisible because of selective display. */ | |
11852 | set_iterator_to_next (it); | |
b1d1124b | 11853 | |
5f5c8ee5 GM |
11854 | /* If we truncate lines, we are done when the last displayed |
11855 | glyphs reach past the right margin of the window. */ | |
11856 | if (it->truncate_lines_p | |
11857 | && (FRAME_WINDOW_P (it->f) | |
11858 | ? (it->current_x >= it->last_visible_x) | |
11859 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 11860 | { |
5f5c8ee5 GM |
11861 | /* Maybe add truncation glyphs. */ |
11862 | if (!FRAME_WINDOW_P (it->f)) | |
11863 | { | |
11864 | --it->glyph_row->used[TEXT_AREA]; | |
11865 | produce_special_glyphs (it, IT_TRUNCATION); | |
11866 | } | |
11867 | ||
11868 | row->truncated_on_right_p = 1; | |
11869 | it->continuation_lines_width = 0; | |
312246d1 | 11870 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
11871 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
11872 | it->hpos = hpos_before; | |
11873 | it->current_x = x_before; | |
11874 | break; | |
75d13c64 | 11875 | } |
a2889657 | 11876 | } |
a2889657 | 11877 | |
5f5c8ee5 GM |
11878 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
11879 | at the left window margin. */ | |
11880 | if (it->first_visible_x | |
11881 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
11882 | { | |
11883 | if (!FRAME_WINDOW_P (it->f)) | |
11884 | insert_left_trunc_glyphs (it); | |
11885 | row->truncated_on_left_p = 1; | |
11886 | } | |
a2889657 | 11887 | |
5f5c8ee5 GM |
11888 | /* If the start of this line is the overlay arrow-position, then |
11889 | mark this glyph row as the one containing the overlay arrow. | |
11890 | This is clearly a mess with variable size fonts. It would be | |
11891 | better to let it be displayed like cursors under X. */ | |
e24c997d | 11892 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 11893 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
11894 | && (MATRIX_ROW_START_CHARPOS (row) |
11895 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 11896 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
11897 | && ! overlay_arrow_seen) |
11898 | { | |
5f5c8ee5 GM |
11899 | /* Overlay arrow in window redisplay is a bitmap. */ |
11900 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 11901 | { |
5f5c8ee5 GM |
11902 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
11903 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
11904 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
11905 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
11906 | struct glyph *p2, *end; | |
11907 | ||
11908 | /* Copy the arrow glyphs. */ | |
11909 | while (glyph < arrow_end) | |
11910 | *p++ = *glyph++; | |
11911 | ||
11912 | /* Throw away padding glyphs. */ | |
11913 | p2 = p; | |
11914 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
11915 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
11916 | ++p2; | |
11917 | if (p2 > p) | |
212e4f87 | 11918 | { |
5f5c8ee5 GM |
11919 | while (p2 < end) |
11920 | *p++ = *p2++; | |
11921 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 11922 | } |
c4628384 | 11923 | } |
5f5c8ee5 | 11924 | |
a2889657 | 11925 | overlay_arrow_seen = 1; |
5f5c8ee5 | 11926 | row->overlay_arrow_p = 1; |
a2889657 JB |
11927 | } |
11928 | ||
5f5c8ee5 GM |
11929 | /* Compute pixel dimensions of this line. */ |
11930 | compute_line_metrics (it); | |
11931 | ||
11932 | /* Remember the position at which this line ends. */ | |
11933 | row->end = it->current; | |
11934 | ||
173cbca8 | 11935 | /* Maybe set the cursor. */ |
5f5c8ee5 GM |
11936 | if (it->w->cursor.vpos < 0 |
11937 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
173cbca8 GM |
11938 | && PT <= MATRIX_ROW_END_CHARPOS (row)) |
11939 | { | |
11940 | /* Also see redisplay_window, case cursor movement in unchanged | |
11941 | window. */ | |
11942 | if (MATRIX_ROW_END_CHARPOS (row) == PT | |
11943 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
11944 | && !row->ends_at_zv_p) | |
11945 | ; | |
11946 | else | |
11947 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
11948 | } | |
5f5c8ee5 GM |
11949 | |
11950 | /* Highlight trailing whitespace. */ | |
8f897821 | 11951 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
11952 | highlight_trailing_whitespace (it->f, it->glyph_row); |
11953 | ||
11954 | /* Prepare for the next line. This line starts horizontally at (X | |
11955 | HPOS) = (0 0). Vertical positions are incremented. As a | |
11956 | convenience for the caller, IT->glyph_row is set to the next | |
11957 | row to be used. */ | |
11958 | it->current_x = it->hpos = 0; | |
11959 | it->current_y += row->height; | |
11960 | ++it->vpos; | |
11961 | ++it->glyph_row; | |
11962 | return row->displays_text_p; | |
a2889657 | 11963 | } |
5f5c8ee5 GM |
11964 | |
11965 | ||
a2889657 | 11966 | \f |
5f5c8ee5 GM |
11967 | /*********************************************************************** |
11968 | Menu Bar | |
11969 | ***********************************************************************/ | |
11970 | ||
11971 | /* Redisplay the menu bar in the frame for window W. | |
11972 | ||
11973 | The menu bar of X frames that don't have X toolkit support is | |
11974 | displayed in a special window W->frame->menu_bar_window. | |
11975 | ||
11976 | The menu bar of terminal frames is treated specially as far as | |
11977 | glyph matrices are concerned. Menu bar lines are not part of | |
11978 | windows, so the update is done directly on the frame matrix rows | |
11979 | for the menu bar. */ | |
7ce2c095 RS |
11980 | |
11981 | static void | |
11982 | display_menu_bar (w) | |
11983 | struct window *w; | |
11984 | { | |
5f5c8ee5 GM |
11985 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11986 | struct it it; | |
11987 | Lisp_Object items; | |
8351baf2 | 11988 | int i; |
7ce2c095 | 11989 | |
5f5c8ee5 | 11990 | /* Don't do all this for graphical frames. */ |
dc937613 | 11991 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
11992 | if (!NILP (Vwindow_system)) |
11993 | return; | |
dc937613 | 11994 | #endif |
dc937613 | 11995 | #ifdef USE_X_TOOLKIT |
d3413a53 | 11996 | if (FRAME_X_P (f)) |
7ce2c095 | 11997 | return; |
5f5c8ee5 GM |
11998 | #endif |
11999 | ||
12000 | #ifdef USE_X_TOOLKIT | |
12001 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 12002 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
12003 | it.first_visible_x = 0; |
12004 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
12005 | #else /* not USE_X_TOOLKIT */ | |
12006 | if (FRAME_WINDOW_P (f)) | |
12007 | { | |
12008 | /* Menu bar lines are displayed in the desired matrix of the | |
12009 | dummy window menu_bar_window. */ | |
12010 | struct window *menu_w; | |
12011 | xassert (WINDOWP (f->menu_bar_window)); | |
12012 | menu_w = XWINDOW (f->menu_bar_window); | |
12013 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 12014 | MENU_FACE_ID); |
5f5c8ee5 GM |
12015 | it.first_visible_x = 0; |
12016 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
12017 | } | |
12018 | else | |
12019 | { | |
12020 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
12021 | pixel x/y. */ | |
12022 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 12023 | MENU_FACE_ID); |
5f5c8ee5 GM |
12024 | it.first_visible_x = 0; |
12025 | it.last_visible_x = FRAME_WIDTH (f); | |
12026 | } | |
12027 | #endif /* not USE_X_TOOLKIT */ | |
12028 | ||
12029 | /* Clear all rows of the menu bar. */ | |
12030 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
12031 | { | |
12032 | struct glyph_row *row = it.glyph_row + i; | |
12033 | clear_glyph_row (row); | |
12034 | row->enabled_p = 1; | |
12035 | row->full_width_p = 1; | |
12036 | } | |
7ce2c095 | 12037 | |
5f5c8ee5 GM |
12038 | /* Make the first line of the menu bar appear in reverse video. */ |
12039 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 12040 | |
5f5c8ee5 GM |
12041 | /* Display all items of the menu bar. */ |
12042 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 12043 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 12044 | { |
5f5c8ee5 GM |
12045 | Lisp_Object string; |
12046 | ||
12047 | /* Stop at nil string. */ | |
8351baf2 RS |
12048 | string = XVECTOR (items)->contents[i + 1]; |
12049 | if (NILP (string)) | |
12050 | break; | |
2d66ad19 | 12051 | |
5f5c8ee5 GM |
12052 | /* Remember where item was displayed. */ |
12053 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 12054 | |
5f5c8ee5 GM |
12055 | /* Display the item, pad with one space. */ |
12056 | if (it.current_x < it.last_visible_x) | |
12057 | display_string (NULL, string, Qnil, 0, 0, &it, | |
12058 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
12059 | } |
12060 | ||
2d66ad19 | 12061 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
12062 | if (it.current_x < it.last_visible_x) |
12063 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 12064 | |
5f5c8ee5 GM |
12065 | /* Compute the total height of the lines. */ |
12066 | compute_line_metrics (&it); | |
7ce2c095 | 12067 | } |
5f5c8ee5 GM |
12068 | |
12069 | ||
7ce2c095 | 12070 | \f |
5f5c8ee5 GM |
12071 | /*********************************************************************** |
12072 | Mode Line | |
12073 | ***********************************************************************/ | |
12074 | ||
715e84c9 GM |
12075 | /* Redisplay mode lines in the window tree whose root is WINDOW. If |
12076 | FORCE is non-zero, redisplay mode lines unconditionally. | |
12077 | Otherwise, redisplay only mode lines that are garbaged. Value is | |
12078 | the number of windows whose mode lines were redisplayed. */ | |
a2889657 | 12079 | |
715e84c9 GM |
12080 | static int |
12081 | redisplay_mode_lines (window, force) | |
12082 | Lisp_Object window; | |
12083 | int force; | |
12084 | { | |
12085 | int nwindows = 0; | |
12086 | ||
12087 | while (!NILP (window)) | |
12088 | { | |
12089 | struct window *w = XWINDOW (window); | |
12090 | ||
12091 | if (WINDOWP (w->hchild)) | |
12092 | nwindows += redisplay_mode_lines (w->hchild, force); | |
12093 | else if (WINDOWP (w->vchild)) | |
12094 | nwindows += redisplay_mode_lines (w->vchild, force); | |
12095 | else if (force | |
12096 | || FRAME_GARBAGED_P (XFRAME (w->frame)) | |
12097 | || !MATRIX_MODE_LINE_ROW (w->current_matrix)->enabled_p) | |
12098 | { | |
12099 | Lisp_Object old_selected_frame; | |
12100 | struct text_pos lpoint; | |
12101 | struct buffer *old = current_buffer; | |
12102 | ||
12103 | /* Set the window's buffer for the mode line display. */ | |
12104 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
12105 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
12106 | ||
12107 | /* Point refers normally to the selected window. For any | |
12108 | other window, set up appropriate value. */ | |
12109 | if (!EQ (window, selected_window)) | |
12110 | { | |
12111 | struct text_pos pt; | |
12112 | ||
12113 | SET_TEXT_POS_FROM_MARKER (pt, w->pointm); | |
12114 | if (CHARPOS (pt) < BEGV) | |
12115 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
12116 | else if (CHARPOS (pt) > (ZV - 1)) | |
12117 | TEMP_SET_PT_BOTH (ZV, ZV_BYTE); | |
12118 | else | |
12119 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
12120 | } | |
12121 | ||
12122 | /* Temporarily set up the selected frame. */ | |
12123 | old_selected_frame = selected_frame; | |
12124 | selected_frame = w->frame; | |
12125 | ||
12126 | /* Display mode lines. */ | |
12127 | clear_glyph_matrix (w->desired_matrix); | |
12128 | if (display_mode_lines (w)) | |
12129 | { | |
12130 | ++nwindows; | |
12131 | w->must_be_updated_p = 1; | |
12132 | } | |
12133 | ||
12134 | /* Restore old settings. */ | |
12135 | selected_frame = old_selected_frame; | |
12136 | set_buffer_internal_1 (old); | |
12137 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); | |
12138 | } | |
12139 | ||
12140 | window = w->next; | |
12141 | } | |
12142 | ||
12143 | return nwindows; | |
12144 | } | |
12145 | ||
12146 | ||
12147 | /* Display the mode and/or top line of window W. Value is the number | |
12148 | of mode lines displayed. */ | |
12149 | ||
12150 | static int | |
5f5c8ee5 | 12151 | display_mode_lines (w) |
a2889657 JB |
12152 | struct window *w; |
12153 | { | |
715e84c9 GM |
12154 | int n = 0; |
12155 | ||
5f5c8ee5 | 12156 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 12157 | line_number_displayed = 0; |
155ef550 | 12158 | w->column_number_displayed = Qnil; |
aa6d10fa | 12159 | |
5f5c8ee5 | 12160 | if (WINDOW_WANTS_MODELINE_P (w)) |
715e84c9 GM |
12161 | { |
12162 | display_mode_line (w, MODE_LINE_FACE_ID, | |
12163 | current_buffer->mode_line_format); | |
12164 | ++n; | |
12165 | } | |
5f5c8ee5 | 12166 | |
045dee35 | 12167 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
715e84c9 GM |
12168 | { |
12169 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
12170 | current_buffer->header_line_format); | |
12171 | ++n; | |
12172 | } | |
12173 | ||
12174 | return n; | |
5f5c8ee5 | 12175 | } |
03b294dc | 12176 | |
03b294dc | 12177 | |
5f5c8ee5 | 12178 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 12179 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
5f5c8ee5 | 12180 | FORMAT is the mode line format to display. */ |
03b294dc | 12181 | |
5f5c8ee5 GM |
12182 | static void |
12183 | display_mode_line (w, face_id, format) | |
12184 | struct window *w; | |
12185 | enum face_id face_id; | |
12186 | Lisp_Object format; | |
12187 | { | |
12188 | struct it it; | |
12189 | struct face *face; | |
03b294dc | 12190 | |
5f5c8ee5 GM |
12191 | init_iterator (&it, w, -1, -1, NULL, face_id); |
12192 | prepare_desired_row (it.glyph_row); | |
12193 | ||
12194 | /* Temporarily make frame's keyboard the current kboard so that | |
12195 | kboard-local variables in the mode_line_format will get the right | |
12196 | values. */ | |
12197 | push_frame_kboard (it.f); | |
12198 | display_mode_element (&it, 0, 0, 0, format); | |
12199 | pop_frame_kboard (); | |
a2889657 | 12200 | |
5f5c8ee5 GM |
12201 | /* Fill up with spaces. */ |
12202 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
12203 | ||
12204 | compute_line_metrics (&it); | |
12205 | it.glyph_row->full_width_p = 1; | |
12206 | it.glyph_row->mode_line_p = 1; | |
12207 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
12208 | it.glyph_row->continued_p = 0; | |
12209 | it.glyph_row->truncated_on_left_p = 0; | |
12210 | it.glyph_row->truncated_on_right_p = 0; | |
12211 | ||
12212 | /* Make a 3D mode-line have a shadow at its right end. */ | |
12213 | face = FACE_FROM_ID (it.f, face_id); | |
12214 | extend_face_to_end_of_line (&it); | |
12215 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 12216 | { |
5f5c8ee5 GM |
12217 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
12218 | + it.glyph_row->used[TEXT_AREA] - 1); | |
12219 | last->right_box_line_p = 1; | |
d7eb09a0 | 12220 | } |
a2889657 JB |
12221 | } |
12222 | ||
a2889657 | 12223 | |
5f5c8ee5 GM |
12224 | /* Contribute ELT to the mode line for window IT->w. How it |
12225 | translates into text depends on its data type. | |
a2889657 | 12226 | |
5f5c8ee5 | 12227 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
12228 | |
12229 | DEPTH is the depth in recursion. It is used to prevent | |
12230 | infinite recursion here. | |
12231 | ||
5f5c8ee5 GM |
12232 | FIELD_WIDTH is the number of characters the display of ELT should |
12233 | occupy in the mode line, and PRECISION is the maximum number of | |
12234 | characters to display from ELT's representation. See | |
12235 | display_string for details. * | |
a2889657 | 12236 | |
5f5c8ee5 | 12237 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
12238 | |
12239 | static int | |
5f5c8ee5 GM |
12240 | display_mode_element (it, depth, field_width, precision, elt) |
12241 | struct it *it; | |
a2889657 | 12242 | int depth; |
5f5c8ee5 GM |
12243 | int field_width, precision; |
12244 | Lisp_Object elt; | |
a2889657 | 12245 | { |
5f5c8ee5 GM |
12246 | int n = 0, field, prec; |
12247 | ||
a2889657 JB |
12248 | tail_recurse: |
12249 | if (depth > 10) | |
12250 | goto invalid; | |
12251 | ||
12252 | depth++; | |
12253 | ||
0220c518 | 12254 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
12255 | { |
12256 | case Lisp_String: | |
12257 | { | |
12258 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
12259 | unsigned char c; |
12260 | unsigned char *this = XSTRING (elt)->data; | |
12261 | unsigned char *lisp_string = this; | |
12262 | ||
12263 | while ((precision <= 0 || n < precision) | |
12264 | && *this | |
12265 | && (frame_title_ptr | |
12266 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
12267 | { |
12268 | unsigned char *last = this; | |
5f5c8ee5 GM |
12269 | |
12270 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
12271 | while ((c = *this++) != '\0' && c != '%') |
12272 | ; | |
5f5c8ee5 | 12273 | |
a2889657 JB |
12274 | if (this - 1 != last) |
12275 | { | |
5f5c8ee5 GM |
12276 | /* Output to end of string or up to '%'. Field width |
12277 | is length of string. Don't output more than | |
12278 | PRECISION allows us. */ | |
12279 | prec = --this - last; | |
12280 | if (precision > 0 && prec > precision - n) | |
12281 | prec = precision - n; | |
12282 | ||
d39b6696 | 12283 | if (frame_title_ptr) |
5f5c8ee5 | 12284 | n += store_frame_title (last, prec, prec); |
d39b6696 | 12285 | else |
5f5c8ee5 GM |
12286 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
12287 | it, 0, prec, 0, -1); | |
a2889657 JB |
12288 | } |
12289 | else /* c == '%' */ | |
12290 | { | |
5f5c8ee5 GM |
12291 | unsigned char *percent_position = this; |
12292 | ||
12293 | /* Get the specified minimum width. Zero means | |
12294 | don't pad. */ | |
12295 | field = 0; | |
a2889657 | 12296 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 12297 | field = field * 10 + c - '0'; |
a2889657 | 12298 | |
5f5c8ee5 GM |
12299 | /* Don't pad beyond the total padding allowed. */ |
12300 | if (field_width - n > 0 && field > field_width - n) | |
12301 | field = field_width - n; | |
a2889657 | 12302 | |
5f5c8ee5 GM |
12303 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
12304 | prec = precision - n; | |
12305 | ||
a2889657 | 12306 | if (c == 'M') |
5f5c8ee5 GM |
12307 | n += display_mode_element (it, depth, field, prec, |
12308 | Vglobal_mode_string); | |
a2889657 | 12309 | else if (c != 0) |
d39b6696 | 12310 | { |
5f5c8ee5 GM |
12311 | unsigned char *spec |
12312 | = decode_mode_spec (it->w, c, field, prec); | |
12313 | ||
d39b6696 | 12314 | if (frame_title_ptr) |
5f5c8ee5 | 12315 | n += store_frame_title (spec, field, prec); |
d39b6696 | 12316 | else |
5f5c8ee5 GM |
12317 | { |
12318 | int nglyphs_before | |
12319 | = it->glyph_row->used[TEXT_AREA]; | |
12320 | int charpos | |
12321 | = percent_position - XSTRING (elt)->data; | |
12322 | int nwritten | |
12323 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
12324 | field, prec, 0, -1); | |
12325 | ||
12326 | /* Assign to the glyphs written above the | |
12327 | string where the `%x' came from, position | |
12328 | of the `%'. */ | |
12329 | if (nwritten > 0) | |
12330 | { | |
12331 | struct glyph *glyph | |
12332 | = (it->glyph_row->glyphs[TEXT_AREA] | |
12333 | + nglyphs_before); | |
12334 | int i; | |
12335 | ||
12336 | for (i = 0; i < nwritten; ++i) | |
12337 | { | |
12338 | glyph[i].object = elt; | |
12339 | glyph[i].charpos = charpos; | |
12340 | } | |
12341 | ||
12342 | n += nwritten; | |
12343 | } | |
12344 | } | |
d39b6696 | 12345 | } |
a2889657 JB |
12346 | } |
12347 | } | |
12348 | } | |
12349 | break; | |
12350 | ||
12351 | case Lisp_Symbol: | |
12352 | /* A symbol: process the value of the symbol recursively | |
12353 | as if it appeared here directly. Avoid error if symbol void. | |
12354 | Special case: if value of symbol is a string, output the string | |
12355 | literally. */ | |
12356 | { | |
12357 | register Lisp_Object tem; | |
12358 | tem = Fboundp (elt); | |
265a9e55 | 12359 | if (!NILP (tem)) |
a2889657 JB |
12360 | { |
12361 | tem = Fsymbol_value (elt); | |
12362 | /* If value is a string, output that string literally: | |
12363 | don't check for % within it. */ | |
e24c997d | 12364 | if (STRINGP (tem)) |
d39b6696 | 12365 | { |
5f5c8ee5 GM |
12366 | prec = XSTRING (tem)->size; |
12367 | if (precision > 0 && prec > precision - n) | |
12368 | prec = precision - n; | |
d39b6696 | 12369 | if (frame_title_ptr) |
5f5c8ee5 | 12370 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 12371 | else |
5f5c8ee5 GM |
12372 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
12373 | 0, prec, 0, -1); | |
d39b6696 | 12374 | } |
a2889657 | 12375 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
12376 | { |
12377 | /* Give up right away for nil or t. */ | |
12378 | elt = tem; | |
12379 | goto tail_recurse; | |
12380 | } | |
a2889657 JB |
12381 | } |
12382 | } | |
12383 | break; | |
12384 | ||
12385 | case Lisp_Cons: | |
12386 | { | |
12387 | register Lisp_Object car, tem; | |
12388 | ||
12389 | /* A cons cell: three distinct cases. | |
12390 | If first element is a string or a cons, process all the elements | |
12391 | and effectively concatenate them. | |
12392 | If first element is a negative number, truncate displaying cdr to | |
12393 | at most that many characters. If positive, pad (with spaces) | |
12394 | to at least that many characters. | |
12395 | If first element is a symbol, process the cadr or caddr recursively | |
12396 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 12397 | car = XCAR (elt); |
5f5c8ee5 GM |
12398 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
12399 | { | |
12400 | /* An element of the form (:eval FORM) means evaluate FORM | |
12401 | and use the result as mode line elements. */ | |
12402 | struct gcpro gcpro1; | |
12403 | Lisp_Object spec; | |
12404 | ||
12405 | spec = eval_form (XCAR (XCDR (elt))); | |
12406 | GCPRO1 (spec); | |
12407 | n += display_mode_element (it, depth, field_width - n, | |
12408 | precision - n, spec); | |
12409 | UNGCPRO; | |
12410 | } | |
12411 | else if (SYMBOLP (car)) | |
a2889657 JB |
12412 | { |
12413 | tem = Fboundp (car); | |
9472f927 | 12414 | elt = XCDR (elt); |
e24c997d | 12415 | if (!CONSP (elt)) |
a2889657 JB |
12416 | goto invalid; |
12417 | /* elt is now the cdr, and we know it is a cons cell. | |
12418 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 12419 | if (!NILP (tem)) |
a2889657 JB |
12420 | { |
12421 | tem = Fsymbol_value (car); | |
265a9e55 | 12422 | if (!NILP (tem)) |
9472f927 GM |
12423 | { |
12424 | elt = XCAR (elt); | |
12425 | goto tail_recurse; | |
12426 | } | |
a2889657 JB |
12427 | } |
12428 | /* Symbol's value is nil (or symbol is unbound) | |
12429 | Get the cddr of the original list | |
12430 | and if possible find the caddr and use that. */ | |
9472f927 | 12431 | elt = XCDR (elt); |
265a9e55 | 12432 | if (NILP (elt)) |
a2889657 | 12433 | break; |
e24c997d | 12434 | else if (!CONSP (elt)) |
a2889657 | 12435 | goto invalid; |
9472f927 | 12436 | elt = XCAR (elt); |
a2889657 JB |
12437 | goto tail_recurse; |
12438 | } | |
e24c997d | 12439 | else if (INTEGERP (car)) |
a2889657 JB |
12440 | { |
12441 | register int lim = XINT (car); | |
9472f927 | 12442 | elt = XCDR (elt); |
a2889657 | 12443 | if (lim < 0) |
5f5c8ee5 GM |
12444 | { |
12445 | /* Negative int means reduce maximum width. */ | |
12446 | if (precision <= 0) | |
12447 | precision = -lim; | |
12448 | else | |
12449 | precision = min (precision, -lim); | |
12450 | } | |
a2889657 JB |
12451 | else if (lim > 0) |
12452 | { | |
12453 | /* Padding specified. Don't let it be more than | |
12454 | current maximum. */ | |
5f5c8ee5 GM |
12455 | if (precision > 0) |
12456 | lim = min (precision, lim); | |
12457 | ||
a2889657 JB |
12458 | /* If that's more padding than already wanted, queue it. |
12459 | But don't reduce padding already specified even if | |
12460 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 12461 | field_width = max (lim, field_width); |
a2889657 JB |
12462 | } |
12463 | goto tail_recurse; | |
12464 | } | |
e24c997d | 12465 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
12466 | { |
12467 | register int limit = 50; | |
5f5c8ee5 GM |
12468 | /* Limit is to protect against circular lists. */ |
12469 | while (CONSP (elt) | |
12470 | && --limit > 0 | |
12471 | && (precision <= 0 || n < precision)) | |
a2889657 | 12472 | { |
5f5c8ee5 | 12473 | n += display_mode_element (it, depth, field_width - n, |
9472f927 GM |
12474 | precision - n, XCAR (elt)); |
12475 | elt = XCDR (elt); | |
a2889657 JB |
12476 | } |
12477 | } | |
12478 | } | |
12479 | break; | |
12480 | ||
12481 | default: | |
12482 | invalid: | |
d39b6696 | 12483 | if (frame_title_ptr) |
5f5c8ee5 | 12484 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 12485 | else |
5f5c8ee5 GM |
12486 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
12487 | precision - n, 0, 0); | |
12488 | return n; | |
a2889657 JB |
12489 | } |
12490 | ||
5f5c8ee5 GM |
12491 | /* Pad to FIELD_WIDTH. */ |
12492 | if (field_width > 0 && n < field_width) | |
12493 | { | |
12494 | if (frame_title_ptr) | |
12495 | n += store_frame_title ("", field_width - n, 0); | |
12496 | else | |
12497 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
12498 | 0, 0, 0); | |
12499 | } | |
12500 | ||
12501 | return n; | |
a2889657 | 12502 | } |
5f5c8ee5 GM |
12503 | |
12504 | ||
766525bc RS |
12505 | /* Write a null-terminated, right justified decimal representation of |
12506 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
12507 | ||
12508 | static void | |
12509 | pint2str (buf, width, d) | |
12510 | register char *buf; | |
12511 | register int width; | |
12512 | register int d; | |
12513 | { | |
12514 | register char *p = buf; | |
12515 | ||
12516 | if (d <= 0) | |
5f5c8ee5 | 12517 | *p++ = '0'; |
766525bc | 12518 | else |
5f5c8ee5 | 12519 | { |
766525bc | 12520 | while (d > 0) |
5f5c8ee5 | 12521 | { |
766525bc RS |
12522 | *p++ = d % 10 + '0'; |
12523 | d /= 10; | |
5f5c8ee5 GM |
12524 | } |
12525 | } | |
12526 | ||
12527 | for (width -= (int) (p - buf); width > 0; --width) | |
12528 | *p++ = ' '; | |
766525bc RS |
12529 | *p-- = '\0'; |
12530 | while (p > buf) | |
5f5c8ee5 | 12531 | { |
766525bc RS |
12532 | d = *buf; |
12533 | *buf++ = *p; | |
12534 | *p-- = d; | |
5f5c8ee5 | 12535 | } |
766525bc RS |
12536 | } |
12537 | ||
5f5c8ee5 | 12538 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
12539 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
12540 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
12541 | ||
6693a99a | 12542 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 12543 | |
1c9241f5 KH |
12544 | static char * |
12545 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
12546 | Lisp_Object coding_system; | |
12547 | register char *buf; | |
12548 | int eol_flag; | |
12549 | { | |
1e1078d6 | 12550 | Lisp_Object val; |
916848d8 | 12551 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
12552 | unsigned char *eol_str; |
12553 | int eol_str_len; | |
12554 | /* The EOL conversion we are using. */ | |
12555 | Lisp_Object eoltype; | |
1e1078d6 | 12556 | |
4a09dee0 | 12557 | val = Fget (coding_system, Qcoding_system); |
085536c2 | 12558 | eoltype = Qnil; |
1c9241f5 | 12559 | |
4a09dee0 | 12560 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 12561 | { |
916848d8 RS |
12562 | if (multibyte) |
12563 | *buf++ = '-'; | |
21e989e3 | 12564 | if (eol_flag) |
302f2b38 | 12565 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 12566 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
12567 | } |
12568 | else | |
12569 | { | |
1e1078d6 RS |
12570 | Lisp_Object eolvalue; |
12571 | ||
12572 | eolvalue = Fget (coding_system, Qeol_type); | |
12573 | ||
916848d8 RS |
12574 | if (multibyte) |
12575 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
12576 | ||
1c9241f5 KH |
12577 | if (eol_flag) |
12578 | { | |
1e1078d6 RS |
12579 | /* The EOL conversion that is normal on this system. */ |
12580 | ||
12581 | if (NILP (eolvalue)) /* Not yet decided. */ | |
12582 | eoltype = eol_mnemonic_undecided; | |
12583 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
12584 | eoltype = eol_mnemonic_undecided; | |
12585 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
12586 | eoltype = (XFASTINT (eolvalue) == 0 | |
12587 | ? eol_mnemonic_unix | |
12588 | : (XFASTINT (eolvalue) == 1 | |
12589 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
12590 | } |
12591 | } | |
5f5c8ee5 | 12592 | |
302f2b38 EZ |
12593 | if (eol_flag) |
12594 | { | |
12595 | /* Mention the EOL conversion if it is not the usual one. */ | |
12596 | if (STRINGP (eoltype)) | |
12597 | { | |
12598 | eol_str = XSTRING (eoltype)->data; | |
12599 | eol_str_len = XSTRING (eoltype)->size; | |
12600 | } | |
f30b3499 KH |
12601 | else if (INTEGERP (eoltype) |
12602 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
12603 | { | |
4a09dee0 | 12604 | eol_str = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
260a86a0 | 12605 | eol_str_len = CHAR_STRING (XINT (eoltype), eol_str); |
f30b3499 | 12606 | } |
302f2b38 EZ |
12607 | else |
12608 | { | |
12609 | eol_str = invalid_eol_type; | |
12610 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 12611 | } |
f30b3499 | 12612 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 12613 | buf += eol_str_len; |
1c9241f5 | 12614 | } |
302f2b38 | 12615 | |
1c9241f5 KH |
12616 | return buf; |
12617 | } | |
12618 | ||
a2889657 | 12619 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
12620 | generated by character C. PRECISION >= 0 means don't return a |
12621 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
12622 | string returned with spaces to that value. */ | |
a2889657 | 12623 | |
11e82b76 JB |
12624 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
12625 | ||
a2889657 | 12626 | static char * |
5f5c8ee5 | 12627 | decode_mode_spec (w, c, field_width, precision) |
a2889657 | 12628 | struct window *w; |
68c45bf0 | 12629 | register int c; |
5f5c8ee5 | 12630 | int field_width, precision; |
a2889657 | 12631 | { |
0b67772d | 12632 | Lisp_Object obj; |
5f5c8ee5 GM |
12633 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
12634 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 12635 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 12636 | |
0b67772d | 12637 | obj = Qnil; |
a2889657 JB |
12638 | |
12639 | switch (c) | |
12640 | { | |
1af9f229 RS |
12641 | case '*': |
12642 | if (!NILP (b->read_only)) | |
12643 | return "%"; | |
12644 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12645 | return "*"; | |
12646 | return "-"; | |
12647 | ||
12648 | case '+': | |
12649 | /* This differs from %* only for a modified read-only buffer. */ | |
12650 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12651 | return "*"; | |
12652 | if (!NILP (b->read_only)) | |
12653 | return "%"; | |
12654 | return "-"; | |
12655 | ||
12656 | case '&': | |
12657 | /* This differs from %* in ignoring read-only-ness. */ | |
12658 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12659 | return "*"; | |
12660 | return "-"; | |
12661 | ||
12662 | case '%': | |
12663 | return "%"; | |
12664 | ||
12665 | case '[': | |
12666 | { | |
12667 | int i; | |
12668 | char *p; | |
12669 | ||
12670 | if (command_loop_level > 5) | |
12671 | return "[[[... "; | |
12672 | p = decode_mode_spec_buf; | |
12673 | for (i = 0; i < command_loop_level; i++) | |
12674 | *p++ = '['; | |
12675 | *p = 0; | |
12676 | return decode_mode_spec_buf; | |
12677 | } | |
12678 | ||
12679 | case ']': | |
12680 | { | |
12681 | int i; | |
12682 | char *p; | |
12683 | ||
12684 | if (command_loop_level > 5) | |
12685 | return " ...]]]"; | |
12686 | p = decode_mode_spec_buf; | |
12687 | for (i = 0; i < command_loop_level; i++) | |
12688 | *p++ = ']'; | |
12689 | *p = 0; | |
12690 | return decode_mode_spec_buf; | |
12691 | } | |
12692 | ||
12693 | case '-': | |
12694 | { | |
1af9f229 | 12695 | register int i; |
5f5c8ee5 GM |
12696 | |
12697 | /* Let lots_of_dashes be a string of infinite length. */ | |
12698 | if (field_width <= 0 | |
12699 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 12700 | { |
5f5c8ee5 GM |
12701 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
12702 | decode_mode_spec_buf[i] = '-'; | |
12703 | decode_mode_spec_buf[i] = '\0'; | |
12704 | return decode_mode_spec_buf; | |
1af9f229 | 12705 | } |
5f5c8ee5 GM |
12706 | else |
12707 | return lots_of_dashes; | |
1af9f229 RS |
12708 | } |
12709 | ||
a2889657 | 12710 | case 'b': |
d39b6696 | 12711 | obj = b->name; |
a2889657 JB |
12712 | break; |
12713 | ||
1af9f229 RS |
12714 | case 'c': |
12715 | { | |
12716 | int col = current_column (); | |
12717 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 12718 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
12719 | return decode_mode_spec_buf; |
12720 | } | |
12721 | ||
12722 | case 'F': | |
12723 | /* %F displays the frame name. */ | |
5f5c8ee5 | 12724 | if (!NILP (f->title)) |
95184b48 | 12725 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 12726 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 12727 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 12728 | return "Emacs"; |
1af9f229 | 12729 | |
a2889657 | 12730 | case 'f': |
d39b6696 | 12731 | obj = b->filename; |
a2889657 JB |
12732 | break; |
12733 | ||
aa6d10fa RS |
12734 | case 'l': |
12735 | { | |
12adba34 RS |
12736 | int startpos = XMARKER (w->start)->charpos; |
12737 | int startpos_byte = marker_byte_position (w->start); | |
12738 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 12739 | int nlines, junk; |
aa6d10fa RS |
12740 | int height = XFASTINT (w->height); |
12741 | ||
12742 | /* If we decided that this buffer isn't suitable for line numbers, | |
12743 | don't forget that too fast. */ | |
12744 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 12745 | goto no_value; |
5300fd39 RS |
12746 | /* But do forget it, if the window shows a different buffer now. */ |
12747 | else if (BUFFERP (w->base_line_pos)) | |
12748 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
12749 | |
12750 | /* If the buffer is very big, don't waste time. */ | |
37d034d3 | 12751 | if (INTEGERP (Vline_number_display_limit) |
090703f4 | 12752 | && BUF_ZV (b) - BUF_BEGV (b) > XINT (Vline_number_display_limit)) |
aa6d10fa RS |
12753 | { |
12754 | w->base_line_pos = Qnil; | |
12755 | w->base_line_number = Qnil; | |
766525bc | 12756 | goto no_value; |
aa6d10fa RS |
12757 | } |
12758 | ||
12759 | if (!NILP (w->base_line_number) | |
12760 | && !NILP (w->base_line_pos) | |
12adba34 | 12761 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
12762 | { |
12763 | line = XFASTINT (w->base_line_number); | |
12764 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 12765 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
12766 | } |
12767 | else | |
12768 | { | |
12769 | line = 1; | |
d39b6696 | 12770 | linepos = BUF_BEGV (b); |
12adba34 | 12771 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
12772 | } |
12773 | ||
12774 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
12775 | nlines = display_count_lines (linepos, linepos_byte, |
12776 | startpos_byte, | |
12777 | startpos, &junk); | |
aa6d10fa RS |
12778 | |
12779 | topline = nlines + line; | |
12780 | ||
12781 | /* Determine a new base line, if the old one is too close | |
12782 | or too far away, or if we did not have one. | |
12783 | "Too close" means it's plausible a scroll-down would | |
12784 | go back past it. */ | |
d39b6696 | 12785 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 12786 | { |
c2213350 KH |
12787 | XSETFASTINT (w->base_line_number, topline); |
12788 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
12789 | } |
12790 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 12791 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 12792 | { |
d39b6696 | 12793 | int limit = BUF_BEGV (b); |
12adba34 | 12794 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 12795 | int position; |
5d121aec | 12796 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
12797 | |
12798 | if (startpos - distance > limit) | |
12adba34 RS |
12799 | { |
12800 | limit = startpos - distance; | |
12801 | limit_byte = CHAR_TO_BYTE (limit); | |
12802 | } | |
aa6d10fa | 12803 | |
12adba34 RS |
12804 | nlines = display_count_lines (startpos, startpos_byte, |
12805 | limit_byte, | |
12806 | - (height * 2 + 30), | |
aa6d10fa RS |
12807 | &position); |
12808 | /* If we couldn't find the lines we wanted within | |
5d121aec | 12809 | line_number_display_limit_width chars per line, |
aa6d10fa | 12810 | give up on line numbers for this window. */ |
12adba34 | 12811 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
12812 | { |
12813 | w->base_line_pos = w->buffer; | |
12814 | w->base_line_number = Qnil; | |
766525bc | 12815 | goto no_value; |
aa6d10fa RS |
12816 | } |
12817 | ||
c2213350 | 12818 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 12819 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
12820 | } |
12821 | ||
12822 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
12823 | nlines = display_count_lines (startpos, startpos_byte, |
12824 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
12825 | |
12826 | /* Record that we did display the line number. */ | |
12827 | line_number_displayed = 1; | |
12828 | ||
12829 | /* Make the string to show. */ | |
5f5c8ee5 | 12830 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 12831 | return decode_mode_spec_buf; |
766525bc RS |
12832 | no_value: |
12833 | { | |
12834 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
12835 | int pad = field_width - 2; |
12836 | while (pad-- > 0) | |
12837 | *p++ = ' '; | |
12838 | *p++ = '?'; | |
b357b9d4 KR |
12839 | *p++ = '?'; |
12840 | *p = '\0'; | |
766525bc RS |
12841 | return decode_mode_spec_buf; |
12842 | } | |
aa6d10fa RS |
12843 | } |
12844 | break; | |
12845 | ||
a2889657 | 12846 | case 'm': |
d39b6696 | 12847 | obj = b->mode_name; |
a2889657 JB |
12848 | break; |
12849 | ||
12850 | case 'n': | |
d39b6696 | 12851 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
12852 | return " Narrow"; |
12853 | break; | |
12854 | ||
a2889657 JB |
12855 | case 'p': |
12856 | { | |
12857 | int pos = marker_position (w->start); | |
d39b6696 | 12858 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 12859 | |
d39b6696 | 12860 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 12861 | { |
d39b6696 | 12862 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12863 | return "All"; |
12864 | else | |
12865 | return "Bottom"; | |
12866 | } | |
d39b6696 | 12867 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12868 | return "Top"; |
12869 | else | |
12870 | { | |
3c7d31b9 RS |
12871 | if (total > 1000000) |
12872 | /* Do it differently for a large value, to avoid overflow. */ | |
12873 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12874 | else | |
12875 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
12876 | /* We can't normally display a 3-digit number, |
12877 | so get us a 2-digit number that is close. */ | |
12878 | if (total == 100) | |
12879 | total = 99; | |
12880 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12881 | return decode_mode_spec_buf; | |
12882 | } | |
12883 | } | |
12884 | ||
8ffcb79f RS |
12885 | /* Display percentage of size above the bottom of the screen. */ |
12886 | case 'P': | |
12887 | { | |
12888 | int toppos = marker_position (w->start); | |
d39b6696 KH |
12889 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
12890 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 12891 | |
d39b6696 | 12892 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 12893 | { |
d39b6696 | 12894 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12895 | return "All"; |
12896 | else | |
12897 | return "Bottom"; | |
12898 | } | |
12899 | else | |
12900 | { | |
3c7d31b9 RS |
12901 | if (total > 1000000) |
12902 | /* Do it differently for a large value, to avoid overflow. */ | |
12903 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12904 | else | |
12905 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
12906 | /* We can't normally display a 3-digit number, |
12907 | so get us a 2-digit number that is close. */ | |
12908 | if (total == 100) | |
12909 | total = 99; | |
d39b6696 | 12910 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12911 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
12912 | else | |
12913 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12914 | return decode_mode_spec_buf; | |
12915 | } | |
12916 | } | |
12917 | ||
1af9f229 RS |
12918 | case 's': |
12919 | /* status of process */ | |
12920 | obj = Fget_buffer_process (w->buffer); | |
12921 | if (NILP (obj)) | |
12922 | return "no process"; | |
12923 | #ifdef subprocesses | |
12924 | obj = Fsymbol_name (Fprocess_status (obj)); | |
12925 | #endif | |
12926 | break; | |
d39b6696 | 12927 | |
1af9f229 RS |
12928 | case 't': /* indicate TEXT or BINARY */ |
12929 | #ifdef MODE_LINE_BINARY_TEXT | |
12930 | return MODE_LINE_BINARY_TEXT (b); | |
12931 | #else | |
12932 | return "T"; | |
12933 | #endif | |
1c9241f5 KH |
12934 | |
12935 | case 'z': | |
12936 | /* coding-system (not including end-of-line format) */ | |
12937 | case 'Z': | |
12938 | /* coding-system (including end-of-line type) */ | |
12939 | { | |
12940 | int eol_flag = (c == 'Z'); | |
539b4d41 | 12941 | char *p = decode_mode_spec_buf; |
1c9241f5 | 12942 | |
d30e754b | 12943 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 12944 | { |
11c52c4f RS |
12945 | /* No need to mention EOL here--the terminal never needs |
12946 | to do EOL conversion. */ | |
12947 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
12948 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 12949 | } |
f13c925f | 12950 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 12951 | p, eol_flag); |
f13c925f | 12952 | |
11c52c4f | 12953 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
12954 | #ifdef subprocesses |
12955 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
12956 | if (PROCESSP (obj)) | |
12957 | { | |
12958 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
12959 | p, eol_flag); | |
12960 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
12961 | p, eol_flag); | |
12962 | } | |
12963 | #endif /* subprocesses */ | |
11c52c4f | 12964 | #endif /* 0 */ |
1c9241f5 KH |
12965 | *p = 0; |
12966 | return decode_mode_spec_buf; | |
12967 | } | |
a2889657 | 12968 | } |
d39b6696 | 12969 | |
e24c997d | 12970 | if (STRINGP (obj)) |
a2889657 JB |
12971 | return (char *) XSTRING (obj)->data; |
12972 | else | |
12973 | return ""; | |
12974 | } | |
5f5c8ee5 GM |
12975 | |
12976 | ||
12adba34 RS |
12977 | /* Count up to COUNT lines starting from START / START_BYTE. |
12978 | But don't go beyond LIMIT_BYTE. | |
12979 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 12980 | |
12adba34 | 12981 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
12982 | |
12983 | static int | |
12adba34 RS |
12984 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
12985 | int start, start_byte, limit_byte, count; | |
12986 | int *byte_pos_ptr; | |
59b49f63 | 12987 | { |
59b49f63 RS |
12988 | register unsigned char *cursor; |
12989 | unsigned char *base; | |
12990 | ||
12991 | register int ceiling; | |
12992 | register unsigned char *ceiling_addr; | |
12adba34 | 12993 | int orig_count = count; |
59b49f63 RS |
12994 | |
12995 | /* If we are not in selective display mode, | |
12996 | check only for newlines. */ | |
12adba34 RS |
12997 | int selective_display = (!NILP (current_buffer->selective_display) |
12998 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
12999 | |
13000 | if (count > 0) | |
12adba34 RS |
13001 | { |
13002 | while (start_byte < limit_byte) | |
13003 | { | |
13004 | ceiling = BUFFER_CEILING_OF (start_byte); | |
13005 | ceiling = min (limit_byte - 1, ceiling); | |
13006 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
13007 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
13008 | while (1) | |
13009 | { | |
13010 | if (selective_display) | |
13011 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
13012 | ; | |
13013 | else | |
13014 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
13015 | ; | |
13016 | ||
13017 | if (cursor != ceiling_addr) | |
13018 | { | |
13019 | if (--count == 0) | |
13020 | { | |
13021 | start_byte += cursor - base + 1; | |
13022 | *byte_pos_ptr = start_byte; | |
13023 | return orig_count; | |
13024 | } | |
13025 | else | |
13026 | if (++cursor == ceiling_addr) | |
13027 | break; | |
13028 | } | |
13029 | else | |
13030 | break; | |
13031 | } | |
13032 | start_byte += cursor - base; | |
13033 | } | |
13034 | } | |
59b49f63 RS |
13035 | else |
13036 | { | |
12adba34 RS |
13037 | while (start_byte > limit_byte) |
13038 | { | |
13039 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
13040 | ceiling = max (limit_byte, ceiling); | |
13041 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
13042 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
13043 | while (1) |
13044 | { | |
12adba34 RS |
13045 | if (selective_display) |
13046 | while (--cursor != ceiling_addr | |
13047 | && *cursor != '\n' && *cursor != 015) | |
13048 | ; | |
13049 | else | |
13050 | while (--cursor != ceiling_addr && *cursor != '\n') | |
13051 | ; | |
13052 | ||
59b49f63 RS |
13053 | if (cursor != ceiling_addr) |
13054 | { | |
13055 | if (++count == 0) | |
13056 | { | |
12adba34 RS |
13057 | start_byte += cursor - base + 1; |
13058 | *byte_pos_ptr = start_byte; | |
13059 | /* When scanning backwards, we should | |
13060 | not count the newline posterior to which we stop. */ | |
13061 | return - orig_count - 1; | |
59b49f63 RS |
13062 | } |
13063 | } | |
13064 | else | |
13065 | break; | |
13066 | } | |
12adba34 RS |
13067 | /* Here we add 1 to compensate for the last decrement |
13068 | of CURSOR, which took it past the valid range. */ | |
13069 | start_byte += cursor - base + 1; | |
59b49f63 RS |
13070 | } |
13071 | } | |
13072 | ||
12adba34 | 13073 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 13074 | |
12adba34 RS |
13075 | if (count < 0) |
13076 | return - orig_count + count; | |
13077 | return orig_count - count; | |
aa6d10fa | 13078 | |
12adba34 | 13079 | } |
a2889657 | 13080 | |
a2889657 | 13081 | |
5f5c8ee5 GM |
13082 | \f |
13083 | /*********************************************************************** | |
13084 | Displaying strings | |
13085 | ***********************************************************************/ | |
278feba9 | 13086 | |
5f5c8ee5 | 13087 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 13088 | |
5f5c8ee5 GM |
13089 | If STRING is non-null, display that C string. Otherwise, the Lisp |
13090 | string LISP_STRING is displayed. | |
a2889657 | 13091 | |
5f5c8ee5 GM |
13092 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
13093 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
13094 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 13095 | |
5f5c8ee5 GM |
13096 | Display the string in the environment given by IT, but use the |
13097 | standard display table, temporarily. | |
a3788d53 | 13098 | |
5f5c8ee5 GM |
13099 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
13100 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
13101 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
13102 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
13103 | ||
13104 | PRECISION is the maximum number of characters to output from | |
13105 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 13106 | |
5f5c8ee5 | 13107 | This is roughly equivalent to printf format specifiers: |
a2889657 | 13108 | |
5f5c8ee5 GM |
13109 | FIELD_WIDTH PRECISION PRINTF |
13110 | ---------------------------------------- | |
13111 | -1 -1 %s | |
13112 | -1 10 %.10s | |
13113 | 10 -1 %10s | |
13114 | 20 10 %20.10s | |
a2889657 | 13115 | |
5f5c8ee5 GM |
13116 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
13117 | display them, and < 0 means obey the current buffer's value of | |
13118 | enable_multibyte_characters. | |
278feba9 | 13119 | |
5f5c8ee5 | 13120 | Value is the number of glyphs produced. */ |
b1d1124b | 13121 | |
5f5c8ee5 GM |
13122 | static int |
13123 | display_string (string, lisp_string, face_string, face_string_pos, | |
13124 | start, it, field_width, precision, max_x, multibyte) | |
13125 | unsigned char *string; | |
13126 | Lisp_Object lisp_string; | |
68c45bf0 PE |
13127 | Lisp_Object face_string; |
13128 | int face_string_pos; | |
5f5c8ee5 GM |
13129 | int start; |
13130 | struct it *it; | |
13131 | int field_width, precision, max_x; | |
13132 | int multibyte; | |
13133 | { | |
13134 | int hpos_at_start = it->hpos; | |
13135 | int saved_face_id = it->face_id; | |
13136 | struct glyph_row *row = it->glyph_row; | |
13137 | ||
13138 | /* Initialize the iterator IT for iteration over STRING beginning | |
13139 | with index START. We assume that IT may be modified here (which | |
13140 | means that display_line has to do something when displaying a | |
13141 | mini-buffer prompt, which it does). */ | |
13142 | reseat_to_string (it, string, lisp_string, start, | |
13143 | precision, field_width, multibyte); | |
13144 | ||
13145 | /* If displaying STRING, set up the face of the iterator | |
13146 | from LISP_STRING, if that's given. */ | |
13147 | if (STRINGP (face_string)) | |
13148 | { | |
13149 | int endptr; | |
13150 | struct face *face; | |
13151 | ||
13152 | it->face_id | |
13153 | = face_at_string_position (it->w, face_string, face_string_pos, | |
13154 | 0, it->region_beg_charpos, | |
13155 | it->region_end_charpos, | |
13156 | &endptr, it->base_face_id); | |
13157 | face = FACE_FROM_ID (it->f, it->face_id); | |
13158 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 13159 | } |
a2889657 | 13160 | |
5f5c8ee5 GM |
13161 | /* Set max_x to the maximum allowed X position. Don't let it go |
13162 | beyond the right edge of the window. */ | |
13163 | if (max_x <= 0) | |
13164 | max_x = it->last_visible_x; | |
13165 | else | |
13166 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 13167 | |
5f5c8ee5 GM |
13168 | /* Skip over display elements that are not visible. because IT->w is |
13169 | hscrolled. */ | |
13170 | if (it->current_x < it->first_visible_x) | |
13171 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
13172 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 13173 | |
5f5c8ee5 GM |
13174 | row->ascent = it->max_ascent; |
13175 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
13176 | row->phys_ascent = it->max_phys_ascent; |
13177 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 13178 | |
5f5c8ee5 GM |
13179 | /* This condition is for the case that we are called with current_x |
13180 | past last_visible_x. */ | |
13181 | while (it->current_x < max_x) | |
a2889657 | 13182 | { |
5f5c8ee5 | 13183 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 13184 | |
5f5c8ee5 GM |
13185 | /* Get the next display element. */ |
13186 | if (!get_next_display_element (it)) | |
90adcf20 | 13187 | break; |
1c9241f5 | 13188 | |
5f5c8ee5 GM |
13189 | /* Produce glyphs. */ |
13190 | x_before = it->current_x; | |
13191 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
13192 | PRODUCE_GLYPHS (it); | |
90adcf20 | 13193 | |
5f5c8ee5 GM |
13194 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
13195 | i = 0; | |
13196 | x = x_before; | |
13197 | while (i < nglyphs) | |
a2889657 | 13198 | { |
5f5c8ee5 GM |
13199 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
13200 | ||
13201 | if (!it->truncate_lines_p | |
13202 | && x + glyph->pixel_width > max_x) | |
13203 | { | |
13204 | /* End of continued line or max_x reached. */ | |
13205 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
13206 | it->current_x = x; | |
13207 | break; | |
13208 | } | |
13209 | else if (x + glyph->pixel_width > it->first_visible_x) | |
13210 | { | |
13211 | /* Glyph is at least partially visible. */ | |
13212 | ++it->hpos; | |
13213 | if (x < it->first_visible_x) | |
13214 | it->glyph_row->x = x - it->first_visible_x; | |
13215 | } | |
13216 | else | |
a2889657 | 13217 | { |
5f5c8ee5 GM |
13218 | /* Glyph is off the left margin of the display area. |
13219 | Should not happen. */ | |
13220 | abort (); | |
a2889657 | 13221 | } |
5f5c8ee5 GM |
13222 | |
13223 | row->ascent = max (row->ascent, it->max_ascent); | |
13224 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
13225 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
13226 | row->phys_height = max (row->phys_height, | |
13227 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
13228 | x += glyph->pixel_width; |
13229 | ++i; | |
a2889657 | 13230 | } |
5f5c8ee5 GM |
13231 | |
13232 | /* Stop if max_x reached. */ | |
13233 | if (i < nglyphs) | |
13234 | break; | |
13235 | ||
13236 | /* Stop at line ends. */ | |
13237 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 13238 | { |
5f5c8ee5 GM |
13239 | it->continuation_lines_width = 0; |
13240 | break; | |
a2889657 | 13241 | } |
1c9241f5 | 13242 | |
5f5c8ee5 | 13243 | set_iterator_to_next (it); |
a688bb24 | 13244 | |
5f5c8ee5 GM |
13245 | /* Stop if truncating at the right edge. */ |
13246 | if (it->truncate_lines_p | |
13247 | && it->current_x >= it->last_visible_x) | |
13248 | { | |
13249 | /* Add truncation mark, but don't do it if the line is | |
13250 | truncated at a padding space. */ | |
13251 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 13252 | { |
5f5c8ee5 GM |
13253 | if (!FRAME_WINDOW_P (it->f)) |
13254 | produce_special_glyphs (it, IT_TRUNCATION); | |
13255 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 13256 | } |
5f5c8ee5 | 13257 | break; |
1c9241f5 | 13258 | } |
a2889657 JB |
13259 | } |
13260 | ||
5f5c8ee5 GM |
13261 | /* Maybe insert a truncation at the left. */ |
13262 | if (it->first_visible_x | |
13263 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 13264 | { |
5f5c8ee5 GM |
13265 | if (!FRAME_WINDOW_P (it->f)) |
13266 | insert_left_trunc_glyphs (it); | |
13267 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
13268 | } |
13269 | ||
5f5c8ee5 GM |
13270 | it->face_id = saved_face_id; |
13271 | ||
13272 | /* Value is number of columns displayed. */ | |
13273 | return it->hpos - hpos_at_start; | |
13274 | } | |
a2889657 | 13275 | |
a2889657 | 13276 | |
a2889657 | 13277 | \f |
5f5c8ee5 GM |
13278 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
13279 | appears as an element of LIST or as the car of an element of LIST. | |
13280 | If PROPVAL is a list, compare each element against LIST in that | |
13281 | way, and return 1 if any element of PROPVAL is found in LIST. | |
13282 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
13283 | |
13284 | int | |
13285 | invisible_p (propval, list) | |
13286 | register Lisp_Object propval; | |
13287 | Lisp_Object list; | |
13288 | { | |
af460d46 | 13289 | register Lisp_Object tail, proptail; |
715e84c9 | 13290 | |
9472f927 | 13291 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
642eefc6 RS |
13292 | { |
13293 | register Lisp_Object tem; | |
9472f927 | 13294 | tem = XCAR (tail); |
642eefc6 RS |
13295 | if (EQ (propval, tem)) |
13296 | return 1; | |
9472f927 | 13297 | if (CONSP (tem) && EQ (propval, XCAR (tem))) |
642eefc6 RS |
13298 | return 1; |
13299 | } | |
715e84c9 | 13300 | |
af460d46 | 13301 | if (CONSP (propval)) |
715e84c9 GM |
13302 | { |
13303 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) | |
13304 | { | |
13305 | Lisp_Object propelt; | |
13306 | propelt = XCAR (proptail); | |
13307 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
13308 | { | |
13309 | register Lisp_Object tem; | |
13310 | tem = XCAR (tail); | |
13311 | if (EQ (propelt, tem)) | |
13312 | return 1; | |
13313 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
13314 | return 1; | |
13315 | } | |
13316 | } | |
13317 | } | |
13318 | ||
642eefc6 RS |
13319 | return 0; |
13320 | } | |
13321 | ||
5f5c8ee5 GM |
13322 | |
13323 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
13324 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
13325 | each element of PROPVAL in that way, and the first time some | |
13326 | element is found, return 1 if the cdr of that element is non-nil. | |
13327 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
13328 | |
13329 | int | |
13330 | invisible_ellipsis_p (propval, list) | |
13331 | register Lisp_Object propval; | |
13332 | Lisp_Object list; | |
13333 | { | |
af460d46 | 13334 | register Lisp_Object tail, proptail; |
9472f927 GM |
13335 | |
13336 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
642eefc6 RS |
13337 | { |
13338 | register Lisp_Object tem; | |
9472f927 GM |
13339 | tem = XCAR (tail); |
13340 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
13341 | return ! NILP (XCDR (tem)); | |
642eefc6 | 13342 | } |
9472f927 | 13343 | |
af460d46 | 13344 | if (CONSP (propval)) |
9472f927 | 13345 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) |
af460d46 RS |
13346 | { |
13347 | Lisp_Object propelt; | |
9472f927 GM |
13348 | propelt = XCAR (proptail); |
13349 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
13350 | { |
13351 | register Lisp_Object tem; | |
9472f927 GM |
13352 | tem = XCAR (tail); |
13353 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
13354 | return ! NILP (XCDR (tem)); | |
af460d46 RS |
13355 | } |
13356 | } | |
9472f927 | 13357 | |
642eefc6 RS |
13358 | return 0; |
13359 | } | |
5f5c8ee5 GM |
13360 | |
13361 | ||
642eefc6 | 13362 | \f |
5f5c8ee5 GM |
13363 | /*********************************************************************** |
13364 | Initialization | |
13365 | ***********************************************************************/ | |
13366 | ||
a2889657 JB |
13367 | void |
13368 | syms_of_xdisp () | |
13369 | { | |
c6e89d6c GM |
13370 | Vwith_echo_area_save_vector = Qnil; |
13371 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 13372 | |
c6e89d6c GM |
13373 | Vmessage_stack = Qnil; |
13374 | staticpro (&Vmessage_stack); | |
13375 | ||
735c094c | 13376 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 13377 | staticpro (&Qinhibit_redisplay); |
735c094c | 13378 | |
5f5c8ee5 GM |
13379 | #if GLYPH_DEBUG |
13380 | defsubr (&Sdump_glyph_matrix); | |
13381 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 13382 | defsubr (&Sdump_tool_bar_row); |
5f5c8ee5 | 13383 | defsubr (&Strace_redisplay_toggle); |
bf9249e3 | 13384 | defsubr (&Strace_to_stderr); |
5f5c8ee5 GM |
13385 | #endif |
13386 | ||
cf074754 RS |
13387 | staticpro (&Qmenu_bar_update_hook); |
13388 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
13389 | ||
d46fb96a | 13390 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 13391 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 13392 | |
399164b4 KH |
13393 | staticpro (&Qoverriding_local_map); |
13394 | Qoverriding_local_map = intern ("overriding-local-map"); | |
13395 | ||
75c43375 RS |
13396 | staticpro (&Qwindow_scroll_functions); |
13397 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
13398 | ||
e0bfbde6 RS |
13399 | staticpro (&Qredisplay_end_trigger_functions); |
13400 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 13401 | |
2e54982e RS |
13402 | staticpro (&Qinhibit_point_motion_hooks); |
13403 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
13404 | ||
9499d71b GM |
13405 | QCdata = intern (":data"); |
13406 | staticpro (&QCdata); | |
5f5c8ee5 | 13407 | Qdisplay = intern ("display"); |
f3751a65 | 13408 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
13409 | Qspace_width = intern ("space-width"); |
13410 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
13411 | Qraise = intern ("raise"); |
13412 | staticpro (&Qraise); | |
13413 | Qspace = intern ("space"); | |
13414 | staticpro (&Qspace); | |
f3751a65 GM |
13415 | Qmargin = intern ("margin"); |
13416 | staticpro (&Qmargin); | |
5f5c8ee5 | 13417 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 13418 | staticpro (&Qleft_margin); |
5f5c8ee5 | 13419 | Qright_margin = intern ("right-margin"); |
f3751a65 | 13420 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
13421 | Qalign_to = intern ("align-to"); |
13422 | staticpro (&Qalign_to); | |
13423 | QCalign_to = intern (":align-to"); | |
13424 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
13425 | Qrelative_width = intern ("relative-width"); |
13426 | staticpro (&Qrelative_width); | |
13427 | QCrelative_width = intern (":relative-width"); | |
13428 | staticpro (&QCrelative_width); | |
13429 | QCrelative_height = intern (":relative-height"); | |
13430 | staticpro (&QCrelative_height); | |
13431 | QCeval = intern (":eval"); | |
13432 | staticpro (&QCeval); | |
d3acf96b | 13433 | Qwhen = intern ("when"); |
f3751a65 | 13434 | staticpro (&Qwhen); |
886bd6f2 GM |
13435 | QCfile = intern (":file"); |
13436 | staticpro (&QCfile); | |
5f5c8ee5 GM |
13437 | Qfontified = intern ("fontified"); |
13438 | staticpro (&Qfontified); | |
13439 | Qfontification_functions = intern ("fontification-functions"); | |
13440 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
13441 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
13442 | staticpro (&Qtrailing_whitespace); | |
13443 | Qimage = intern ("image"); | |
13444 | staticpro (&Qimage); | |
ad4f174e GM |
13445 | Qmessage_truncate_lines = intern ("message-truncate-lines"); |
13446 | staticpro (&Qmessage_truncate_lines); | |
5f5c8ee5 | 13447 | |
a2889657 JB |
13448 | last_arrow_position = Qnil; |
13449 | last_arrow_string = Qnil; | |
f3751a65 GM |
13450 | staticpro (&last_arrow_position); |
13451 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
13452 | |
13453 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
13454 | staticpro (&echo_buffer[0]); | |
13455 | staticpro (&echo_buffer[1]); | |
13456 | ||
13457 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
13458 | staticpro (&echo_area_buffer[0]); | |
13459 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 13460 | |
6a94510a GM |
13461 | Vmessages_buffer_name = build_string ("*Messages*"); |
13462 | staticpro (&Vmessages_buffer_name); | |
13463 | ||
8f897821 GM |
13464 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
13465 | "Non-nil means highlight trailing whitespace.\n\ | |
13466 | The face used for trailing whitespace is `trailing-whitespace'."); | |
13467 | Vshow_trailing_whitespace = Qnil; | |
13468 | ||
735c094c KH |
13469 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
13470 | "Non-nil means don't actually do any redisplay.\n\ | |
13471 | This is used for internal purposes."); | |
13472 | Vinhibit_redisplay = Qnil; | |
13473 | ||
a2889657 | 13474 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 13475 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
13476 | Vglobal_mode_string = Qnil; |
13477 | ||
13478 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
13479 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
13480 | This must be the beginning of a line in order to work.\n\ | |
13481 | See also `overlay-arrow-string'."); | |
13482 | Voverlay_arrow_position = Qnil; | |
13483 | ||
13484 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
13485 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
13486 | Voverlay_arrow_string = Qnil; | |
13487 | ||
13488 | DEFVAR_INT ("scroll-step", &scroll_step, | |
13489 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
13490 | If that fails to bring point back on frame, point is centered instead.\n\ |
13491 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 13492 | |
0789adb2 | 13493 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
090f7baa GM |
13494 | "*Scroll up to this many lines, to bring point back on screen.\n\ |
13495 | A value of zero means to scroll the text to center point vertically\n\ | |
13496 | in the window."); | |
0789adb2 RS |
13497 | scroll_conservatively = 0; |
13498 | ||
9afd2168 RS |
13499 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
13500 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
13501 | Recenter the window whenever point gets within this many lines\n\ | |
13502 | of the top or bottom of the window."); | |
13503 | scroll_margin = 0; | |
13504 | ||
5f5c8ee5 | 13505 | #if GLYPH_DEBUG |
a2889657 | 13506 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 13507 | #endif |
a2889657 JB |
13508 | |
13509 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
13510 | &truncate_partial_width_windows, | |
44fa5b1e | 13511 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
13512 | truncate_partial_width_windows = 1; |
13513 | ||
13514 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
13515 | "*Non-nil means use inverse video for the mode line."); | |
13516 | mode_line_inverse_video = 1; | |
aa6d10fa | 13517 | |
090703f4 | 13518 | DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit, |
5f5c8ee5 | 13519 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 13520 | If the buffer is bigger than this, the line number does not appear\n\ |
090703f4 GM |
13521 | in the mode line. A value of nil means no limit."); |
13522 | Vline_number_display_limit = Qnil; | |
fba9ce76 | 13523 | |
090703f4 GM |
13524 | DEFVAR_INT ("line-number-display-limit-width", |
13525 | &line_number_display_limit_width, | |
5d121aec KH |
13526 | "*Maximum line width (in characters) for line number display.\n\ |
13527 | If the average length of the lines near point is bigger than this, then the\n\ | |
13528 | line number may be omitted from the mode line."); | |
13529 | line_number_display_limit_width = 200; | |
13530 | ||
fba9ce76 RS |
13531 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
13532 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 13533 | highlight_nonselected_windows = 0; |
d39b6696 KH |
13534 | |
13535 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
13536 | "Non-nil if more than one frame is visible on this display.\n\ |
13537 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
13538 | This variable is not guaranteed to be accurate except while processing\n\ |
13539 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
13540 | |
13541 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 13542 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
13543 | \(Assuming the window manager supports this feature.)\n\ |
13544 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
13545 | and is used only on frames for which no explicit name has been set\n\ | |
13546 | \(see `modify-frame-parameters')."); | |
13547 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 13548 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
13549 | \(Assuming the window manager supports this feature.)\n\ |
13550 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
13551 | and is used only on frames for which no explicit name has been set\n\ | |
13552 | \(see `modify-frame-parameters')."); | |
13553 | Vicon_title_format | |
13554 | = Vframe_title_format | |
13555 | = Fcons (intern ("multiple-frames"), | |
13556 | Fcons (build_string ("%b"), | |
13557 | Fcons (Fcons (build_string (""), | |
13558 | Fcons (intern ("invocation-name"), | |
13559 | Fcons (build_string ("@"), | |
13560 | Fcons (intern ("system-name"), | |
13561 | Qnil)))), | |
13562 | Qnil))); | |
5992c4f7 KH |
13563 | |
13564 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
13565 | "Maximum number of lines to keep in the message log buffer.\n\ | |
13566 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
13567 | the buffer when it becomes large."); | |
13568 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
13569 | |
13570 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
13571 | "Functions called before redisplay, if window sizes have changed.\n\ | |
13572 | The value should be a list of functions that take one argument.\n\ | |
13573 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
13574 | size since the last redisplay, or have been split or deleted,\n\ | |
13575 | all the functions in the list are called, with the frame as argument."); | |
13576 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
13577 | |
13578 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 13579 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 13580 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
13581 | and its new display-start position. Note that the value of `window-end'\n\ |
13582 | is not valid when these functions are called."); | |
75c43375 | 13583 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 13584 | |
e037b9ec GM |
13585 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
13586 | "*Non-nil means automatically resize tool-bars.\n\ | |
13587 | This increases a tool-bar's height if not all tool-bar items are visible.\n\ | |
13588 | It decreases a tool-bar's height when it would display blank lines\n\ | |
5f5c8ee5 | 13589 | otherwise."); |
e037b9ec | 13590 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 13591 | |
e037b9ec GM |
13592 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
13593 | "*Non-nil means raise tool-bar buttons when the mouse moves over them."); | |
13594 | auto_raise_tool_bar_buttons_p = 1; | |
5f5c8ee5 | 13595 | |
e037b9ec GM |
13596 | DEFVAR_INT ("tool-bar-button-margin", &tool_bar_button_margin, |
13597 | "*Margin around tool-bar buttons in pixels."); | |
13598 | tool_bar_button_margin = 1; | |
5f5c8ee5 | 13599 | |
e037b9ec GM |
13600 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
13601 | "Relief thickness of tool-bar buttons."); | |
13602 | tool_bar_button_relief = 3; | |
5f5c8ee5 GM |
13603 | |
13604 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
13605 | "List of functions to call to fontify regions of text.\n\ | |
13606 | Each function is called with one argument POS. Functions must\n\ | |
13607 | fontify a region starting at POS in the current buffer, and give\n\ | |
13608 | fontified regions the property `fontified'.\n\ | |
13609 | This variable automatically becomes buffer-local when set."); | |
13610 | Vfontification_functions = Qnil; | |
13611 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
13612 | |
13613 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
13614 | &unibyte_display_via_language_environment, |
13615 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
13616 | Specifically this means that unibyte non-ASCII characters\n\ |
13617 | are displayed by converting them to the equivalent multibyte characters\n\ | |
13618 | according to the current language environment. As a result, they are\n\ | |
13619 | displayed according to the current fontset."); | |
13620 | unibyte_display_via_language_environment = 0; | |
c6e89d6c GM |
13621 | |
13622 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, | |
13623 | "*Maximum height for resizing mini-windows.\n\ | |
13624 | If a float, it specifies a fraction of the mini-window frame's height.\n\ | |
97cafc0f GM |
13625 | If an integer, it specifies a number of lines.\n\ |
13626 | If nil, don't resize."); | |
c6e89d6c | 13627 | Vmax_mini_window_height = make_float (0.25); |
d6d26ed3 GM |
13628 | |
13629 | DEFVAR_BOOL ("cursor-in-non-selected-windows", | |
13630 | &cursor_in_non_selected_windows, | |
13631 | "*Non-nil means display a hollow cursor in non-selected windows.\n\ | |
13632 | Nil means don't display a cursor there."); | |
13633 | cursor_in_non_selected_windows = 1; | |
d475bcb8 GM |
13634 | |
13635 | DEFVAR_BOOL ("automatic-hscrolling", &automatic_hscrolling_p, | |
13636 | "*Non-nil means scroll the display automatically to make point visible."); | |
13637 | automatic_hscrolling_p = 1; | |
e00daaa0 GM |
13638 | |
13639 | DEFVAR_LISP ("image-types", &Vimage_types, | |
ad4f174e | 13640 | "List of supported image types.\n\ |
e00daaa0 GM |
13641 | Each element of the list is a symbol for a supported image type."); |
13642 | Vimage_types = Qnil; | |
ad4f174e GM |
13643 | |
13644 | DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines, | |
13645 | "If non-nil, messages are truncated instead of resizing the echo area.\n\ | |
13646 | Bind this around calls to `message' to let it take effect."); | |
13647 | message_truncate_lines = 0; | |
a2889657 JB |
13648 | } |
13649 | ||
5f5c8ee5 GM |
13650 | |
13651 | /* Initialize this module when Emacs starts. */ | |
13652 | ||
dfcf069d | 13653 | void |
a2889657 JB |
13654 | init_xdisp () |
13655 | { | |
13656 | Lisp_Object root_window; | |
5f5c8ee5 | 13657 | struct window *mini_w; |
a2889657 | 13658 | |
5f5c8ee5 | 13659 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
13660 | |
13661 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 13662 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 13663 | |
a2889657 JB |
13664 | if (!noninteractive) |
13665 | { | |
5f5c8ee5 GM |
13666 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
13667 | int i; | |
13668 | ||
13669 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 13670 | set_window_height (root_window, |
5f5c8ee5 | 13671 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 13672 | 0); |
c2213350 | 13673 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
13674 | set_window_height (minibuf_window, 1, 0); |
13675 | ||
c2213350 KH |
13676 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
13677 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
13678 | |
13679 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
13680 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
13681 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
13682 | ||
13683 | /* The default ellipsis glyphs `...'. */ | |
13684 | for (i = 0; i < 3; ++i) | |
13685 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 13686 | } |
5f5c8ee5 GM |
13687 | |
13688 | #ifdef HAVE_WINDOW_SYSTEM | |
13689 | { | |
13690 | /* Allocate the buffer for frame titles. */ | |
13691 | int size = 100; | |
13692 | frame_title_buf = (char *) xmalloc (size); | |
13693 | frame_title_buf_end = frame_title_buf + size; | |
13694 | frame_title_ptr = NULL; | |
13695 | } | |
13696 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 13697 | } |
5f5c8ee5 GM |
13698 | |
13699 |