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a2889657 | 1 | /* Display generation from window structure and buffer text. |
5f5c8ee5 GM |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99 |
3 | Free Software Foundation, Inc. | |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 | 21 | |
5f5c8ee5 GM |
22 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
23 | ||
24 | Redisplay. | |
25 | ||
26 | Emacs separates the task of updating the display from code | |
27 | modifying global state, e.g. buffer text. This way functions | |
28 | operating on buffers don't also have to be concerned with updating | |
29 | the display. | |
30 | ||
31 | Updating the display is triggered by the Lisp interpreter when it | |
32 | decides it's time to do it. This is done either automatically for | |
33 | you as part of the interpreter's command loop or as the result of | |
34 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
35 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
36 | let's say almost---see the the description of direct update | |
37 | operations, below.). | |
38 | ||
39 | The following diagram shows how redisplay code is invoked. As you | |
40 | can see, Lisp calls redisplay and vice versa. Under window systems | |
41 | like X, some portions of the redisplay code are also called | |
42 | asynchronously during mouse movement or expose events. It is very | |
43 | important that these code parts do NOT use the C library (malloc, | |
44 | free) because many C libraries under Unix are not reentrant. They | |
45 | may also NOT call functions of the Lisp interpreter which could | |
46 | change the interpreter's state. If you don't follow these rules, | |
47 | you will encounter bugs which are very hard to explain. | |
48 | ||
49 | (Direct functions, see below) | |
50 | direct_output_for_insert, | |
51 | direct_forward_char (dispnew.c) | |
52 | +---------------------------------+ | |
53 | | | | |
54 | | V | |
55 | +--------------+ redisplay() +----------------+ | |
56 | | Lisp machine |---------------->| Redisplay code |<--+ | |
57 | +--------------+ (xdisp.c) +----------------+ | | |
58 | ^ | | | |
59 | +----------------------------------+ | | |
60 | Don't use this path when called | | |
61 | asynchronously! | | |
62 | | | |
63 | expose_window (asynchronous) | | |
64 | | | |
65 | X expose events -----+ | |
66 | ||
67 | What does redisplay? Obviously, it has to figure out somehow what | |
68 | has been changed since the last time the display has been updated, | |
69 | and to make these changes visible. Preferably it would do that in | |
70 | a moderately intelligent way, i.e. fast. | |
71 | ||
72 | Changes in buffer text can be deduced from window and buffer | |
73 | structures, and from some global variables like `beg_unchanged' and | |
74 | `end_unchanged'. The contents of the display are additionally | |
75 | recorded in a `glyph matrix', a two-dimensional matrix of glyph | |
76 | structures. Each row in such a matrix corresponds to a line on the | |
77 | display, and each glyph in a row corresponds to a column displaying | |
78 | a character, an image, or what else. This matrix is called the | |
79 | `current glyph matrix' or `current matrix' in redisplay | |
80 | terminology. | |
81 | ||
82 | For buffer parts that have been changed since the last update, a | |
83 | second glyph matrix is constructed, the so called `desired glyph | |
84 | matrix' or short `desired matrix'. Current and desired matrix are | |
85 | then compared to find a cheap way to update the display, e.g. by | |
86 | reusing part of the display by scrolling lines. | |
87 | ||
88 | ||
89 | Direct operations. | |
90 | ||
91 | You will find a lot of of redisplay optimizations when you start | |
92 | looking at the innards of redisplay. The overall goal of all these | |
93 | optimizations is to make redisplay fast because it is done | |
94 | frequently. | |
95 | ||
96 | Two optimizations are not found in xdisp.c. These are the direct | |
97 | operations mentioned above. As the name suggests they follow a | |
98 | different principle than the rest of redisplay. Instead of | |
99 | building a desired matrix and then comparing it with the current | |
100 | display, they perform their actions directly on the display and on | |
101 | the current matrix. | |
102 | ||
103 | One direct operation updates the display after one character has | |
104 | been entered. The other one moves the cursor by one position | |
105 | forward or backward. You find these functions under the names | |
106 | `direct_output_for_insert' and `direct_output_forward_char' in | |
107 | dispnew.c. | |
108 | ||
109 | ||
110 | Desired matrices. | |
111 | ||
112 | Desired matrices are always built per Emacs window. The function | |
113 | `display_line' is the central function to look at if you are | |
114 | interested. It constructs one row in a desired matrix given an | |
115 | iterator structure containing both a buffer position and a | |
116 | description of the environment in which the text is to be | |
117 | displayed. But this is too early, read on. | |
118 | ||
119 | Characters and pixmaps displayed for a range of buffer text depend | |
120 | on various settings of buffers and windows, on overlays and text | |
121 | properties, on display tables, on selective display. The good news | |
122 | is that all this hairy stuff is hidden behind a small set of | |
123 | interface functions taking a iterator structure (struct it) | |
124 | argument. | |
125 | ||
126 | Iteration over things to be be displayed is then simple. It is | |
127 | started by initializing an iterator with a call to init_iterator | |
128 | (or init_string_iterator for that matter). Calls to | |
129 | get_next_display_element fill the iterator structure with relevant | |
130 | information about the next thing to display. Calls to | |
131 | set_iterator_to_next move the iterator to the next thing. | |
132 | ||
133 | Besides this, an iterator also contains information about the | |
134 | display environment in which glyphs for display elements are to be | |
135 | produced. It has fields for the width and height of the display, | |
136 | the information whether long lines are truncated or continued, a | |
137 | current X and Y position, and lots of other stuff you can better | |
138 | see in dispextern.h. | |
139 | ||
140 | Glyphs in a desired matrix are normally constructed in a loop | |
141 | calling get_next_display_element and then produce_glyphs. The call | |
142 | to produce_glyphs will fill the iterator structure with pixel | |
143 | information about the element being displayed and at the same time | |
144 | produce glyphs for it. If the display element fits on the line | |
145 | being displayed, set_iterator_to_next is called next, otherwise the | |
146 | glyphs produced are discarded. | |
147 | ||
148 | ||
149 | Frame matrices. | |
150 | ||
151 | That just couldn't be all, could it? What about terminal types not | |
152 | supporting operations on sub-windows of the screen? To update the | |
153 | display on such a terminal, window-based glyph matrices are not | |
154 | well suited. To be able to reuse part of the display (scrolling | |
155 | lines up and down), we must instead have a view of the whole | |
156 | screen. This is what `frame matrices' are for. They are a trick. | |
157 | ||
158 | Frames on terminals like above have a glyph pool. Windows on such | |
159 | a frame sub-allocate their glyph memory from their frame's glyph | |
160 | pool. The frame itself is given its own glyph matrices. By | |
161 | coincidence---or maybe something else---rows in window glyph | |
162 | matrices are slices of corresponding rows in frame matrices. Thus | |
163 | writing to window matrices implicitly updates a frame matrix which | |
164 | provides us with the view of the whole screen that we originally | |
165 | wanted to have without having to move many bytes around. To be | |
166 | honest, there is a little bit more done, but not much more. If you | |
167 | plan to extend that code, take a look at dispnew.c. The function | |
168 | build_frame_matrix is a good starting point. */ | |
a2889657 | 169 | |
18160b98 | 170 | #include <config.h> |
a2889657 | 171 | #include <stdio.h> |
a2889657 | 172 | #include "lisp.h" |
44fa5b1e | 173 | #include "frame.h" |
a2889657 JB |
174 | #include "window.h" |
175 | #include "termchar.h" | |
176 | #include "dispextern.h" | |
177 | #include "buffer.h" | |
1c9241f5 | 178 | #include "charset.h" |
a2889657 JB |
179 | #include "indent.h" |
180 | #include "commands.h" | |
181 | #include "macros.h" | |
182 | #include "disptab.h" | |
30c566e4 | 183 | #include "termhooks.h" |
b0a0fbda | 184 | #include "intervals.h" |
fe8b0cf8 | 185 | #include "keyboard.h" |
1c9241f5 KH |
186 | #include "coding.h" |
187 | #include "process.h" | |
dfcf069d AS |
188 | #include "region-cache.h" |
189 | ||
6d55d620 | 190 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
191 | #include "xterm.h" |
192 | #endif | |
a75dfea0 AI |
193 | #ifdef WINDOWSNT |
194 | #include "w32term.h" | |
195 | #endif | |
a2889657 | 196 | |
5f5c8ee5 GM |
197 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
198 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
199 | ||
200 | #define INFINITY 10000000 | |
201 | ||
8f3343d0 | 202 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
76412d64 | 203 | extern void set_frame_menubar (); |
cd6dfed6 | 204 | extern int pending_menu_activation; |
76412d64 RS |
205 | #endif |
206 | ||
a2889657 JB |
207 | extern int interrupt_input; |
208 | extern int command_loop_level; | |
209 | ||
b6436d4e RS |
210 | extern int minibuffer_auto_raise; |
211 | ||
c4628384 RS |
212 | extern Lisp_Object Qface; |
213 | ||
399164b4 KH |
214 | extern Lisp_Object Voverriding_local_map; |
215 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 216 | extern Lisp_Object Qmenu_item; |
399164b4 | 217 | |
d46fb96a | 218 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 219 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 220 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 221 | Lisp_Object Qinhibit_point_motion_hooks; |
9499d71b | 222 | Lisp_Object QCeval, Qwhen, QCfile, QCdata; |
5f5c8ee5 GM |
223 | Lisp_Object Qfontified; |
224 | ||
225 | /* Functions called to fontify regions of text. */ | |
226 | ||
227 | Lisp_Object Vfontification_functions; | |
228 | Lisp_Object Qfontification_functions; | |
229 | ||
e037b9ec | 230 | /* Non-zero means draw tool bar buttons raised when the mouse moves |
5f5c8ee5 GM |
231 | over them. */ |
232 | ||
e037b9ec | 233 | int auto_raise_tool_bar_buttons_p; |
5f5c8ee5 | 234 | |
e037b9ec | 235 | /* Margin around tool bar buttons in pixels. */ |
5f5c8ee5 | 236 | |
e037b9ec | 237 | int tool_bar_button_margin; |
5f5c8ee5 | 238 | |
e037b9ec | 239 | /* Thickness of shadow to draw around tool bar buttons. */ |
5f5c8ee5 | 240 | |
e037b9ec | 241 | int tool_bar_button_relief; |
5f5c8ee5 | 242 | |
e037b9ec | 243 | /* Non-zero means automatically resize tool-bars so that all tool-bar |
5f5c8ee5 GM |
244 | items are visible, and no blank lines remain. */ |
245 | ||
e037b9ec | 246 | int auto_resize_tool_bars_p; |
399164b4 | 247 | |
735c094c KH |
248 | /* Non-nil means don't actually do any redisplay. */ |
249 | ||
250 | Lisp_Object Vinhibit_redisplay, Qinhibit_redisplay; | |
251 | ||
5f5c8ee5 GM |
252 | /* Names of text properties relevant for redisplay. */ |
253 | ||
a7e27ef7 DL |
254 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
255 | extern Lisp_Object Qface, Qinvisible, Qimage, Qwidth; | |
5f5c8ee5 GM |
256 | |
257 | /* Symbols used in text property values. */ | |
258 | ||
259 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 260 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 261 | Lisp_Object Qmargin; |
a7e27ef7 | 262 | extern Lisp_Object Qheight; |
5f5c8ee5 | 263 | |
8f897821 | 264 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 265 | |
8f897821 | 266 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
267 | |
268 | /* Name of the face used to highlight trailing whitespace. */ | |
269 | ||
270 | Lisp_Object Qtrailing_whitespace; | |
271 | ||
272 | /* The symbol `image' which is the car of the lists used to represent | |
273 | images in Lisp. */ | |
274 | ||
275 | Lisp_Object Qimage; | |
276 | ||
277 | /* Non-zero means print newline to stdout before next mini-buffer | |
278 | message. */ | |
a2889657 JB |
279 | |
280 | int noninteractive_need_newline; | |
281 | ||
5f5c8ee5 | 282 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 283 | |
3c6595e0 | 284 | static int message_log_need_newline; |
f88eb0b6 | 285 | |
5f5c8ee5 GM |
286 | \f |
287 | /* The buffer position of the first character appearing entirely or | |
288 | partially on the line of the selected window which contains the | |
289 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
290 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 291 | |
5f5c8ee5 | 292 | static struct text_pos this_line_start_pos; |
a2889657 | 293 | |
5f5c8ee5 GM |
294 | /* Number of characters past the end of the line above, including the |
295 | terminating newline. */ | |
296 | ||
297 | static struct text_pos this_line_end_pos; | |
298 | ||
299 | /* The vertical positions and the height of this line. */ | |
a2889657 | 300 | |
a2889657 | 301 | static int this_line_vpos; |
5f5c8ee5 GM |
302 | static int this_line_y; |
303 | static int this_line_pixel_height; | |
304 | ||
305 | /* X position at which this display line starts. Usually zero; | |
306 | negative if first character is partially visible. */ | |
307 | ||
308 | static int this_line_start_x; | |
a2889657 | 309 | |
5f5c8ee5 | 310 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 311 | |
a2889657 JB |
312 | static struct buffer *this_line_buffer; |
313 | ||
5f5c8ee5 GM |
314 | /* Nonzero means truncate lines in all windows less wide than the |
315 | frame. */ | |
a2889657 | 316 | |
a2889657 JB |
317 | int truncate_partial_width_windows; |
318 | ||
7bbe686f | 319 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 320 | |
7bbe686f | 321 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
322 | |
323 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
324 | Not guaranteed to be accurate except while parsing | |
325 | frame-title-format. */ | |
7bbe686f | 326 | |
d39b6696 KH |
327 | int multiple_frames; |
328 | ||
a2889657 JB |
329 | Lisp_Object Vglobal_mode_string; |
330 | ||
331 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 332 | |
a2889657 JB |
333 | Lisp_Object Voverlay_arrow_position; |
334 | ||
5f5c8ee5 GM |
335 | /* String to display for the arrow. Only used on terminal frames. */ |
336 | ||
a2889657 JB |
337 | Lisp_Object Voverlay_arrow_string; |
338 | ||
5f5c8ee5 GM |
339 | /* Values of those variables at last redisplay. However, if |
340 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
341 | numerical position. */ | |
342 | ||
d45de95b RS |
343 | static Lisp_Object last_arrow_position, last_arrow_string; |
344 | ||
5f5c8ee5 GM |
345 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
346 | ||
d39b6696 KH |
347 | Lisp_Object Vframe_title_format; |
348 | ||
5f5c8ee5 GM |
349 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
350 | ||
d39b6696 KH |
351 | Lisp_Object Vicon_title_format; |
352 | ||
08b610e4 RS |
353 | /* List of functions to call when a window's size changes. These |
354 | functions get one arg, a frame on which one or more windows' sizes | |
355 | have changed. */ | |
5f5c8ee5 | 356 | |
08b610e4 RS |
357 | static Lisp_Object Vwindow_size_change_functions; |
358 | ||
cf074754 RS |
359 | Lisp_Object Qmenu_bar_update_hook; |
360 | ||
a2889657 | 361 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 362 | |
5f5c8ee5 | 363 | static int overlay_arrow_seen; |
ca26e1c8 | 364 | |
fba9ce76 | 365 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 366 | |
5f5c8ee5 GM |
367 | int highlight_nonselected_windows; |
368 | ||
369 | /* If cursor motion alone moves point off frame, try scrolling this | |
370 | many lines up or down if that will bring it back. */ | |
371 | ||
14510fee | 372 | static int scroll_step; |
a2889657 | 373 | |
5f5c8ee5 GM |
374 | /* Non-0 means scroll just far enough to bring point back on the |
375 | screen, when appropriate. */ | |
376 | ||
0789adb2 RS |
377 | static int scroll_conservatively; |
378 | ||
5f5c8ee5 GM |
379 | /* Recenter the window whenever point gets within this many lines of |
380 | the top or bottom of the window. This value is translated into a | |
381 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
382 | there is really a fixed pixel height scroll margin. */ | |
383 | ||
9afd2168 RS |
384 | int scroll_margin; |
385 | ||
5f5c8ee5 GM |
386 | /* Number of windows showing the buffer of the selected window (or |
387 | another buffer with the same base buffer). keyboard.c refers to | |
388 | this. */ | |
a2889657 | 389 | |
a2889657 JB |
390 | int buffer_shared; |
391 | ||
5f5c8ee5 | 392 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 393 | |
5f5c8ee5 | 394 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 395 | |
5f5c8ee5 | 396 | /* Nonzero means display mode line highlighted. */ |
a2889657 | 397 | |
a2889657 JB |
398 | int mode_line_inverse_video; |
399 | ||
5f5c8ee5 GM |
400 | /* Prompt to display in front of the mini-buffer contents. */ |
401 | ||
8c5b6a0a | 402 | Lisp_Object minibuf_prompt; |
a2889657 | 403 | |
5f5c8ee5 GM |
404 | /* Width of current mini-buffer prompt. Only set after display_line |
405 | of the line that contains the prompt. */ | |
406 | ||
a2889657 | 407 | int minibuf_prompt_width; |
5f5c8ee5 GM |
408 | int minibuf_prompt_pixel_width; |
409 | ||
5f5c8ee5 GM |
410 | /* This is the window where the echo area message was displayed. It |
411 | is always a mini-buffer window, but it may not be the same window | |
412 | currently active as a mini-buffer. */ | |
413 | ||
73af359d RS |
414 | Lisp_Object echo_area_window; |
415 | ||
c6e89d6c GM |
416 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
417 | pushes the current message and the value of | |
418 | message_enable_multibyte on the stack, the function restore_message | |
419 | pops the stack and displays MESSAGE again. */ | |
420 | ||
421 | Lisp_Object Vmessage_stack; | |
422 | ||
a3788d53 RS |
423 | /* Nonzero means multibyte characters were enabled when the echo area |
424 | message was specified. */ | |
5f5c8ee5 | 425 | |
a3788d53 RS |
426 | int message_enable_multibyte; |
427 | ||
5f5c8ee5 GM |
428 | /* True if we should redraw the mode lines on the next redisplay. */ |
429 | ||
a2889657 JB |
430 | int update_mode_lines; |
431 | ||
5f5c8ee5 GM |
432 | /* Nonzero if window sizes or contents have changed since last |
433 | redisplay that finished */ | |
434 | ||
a2889657 JB |
435 | int windows_or_buffers_changed; |
436 | ||
5f5c8ee5 GM |
437 | /* Nonzero after display_mode_line if %l was used and it displayed a |
438 | line number. */ | |
439 | ||
aa6d10fa RS |
440 | int line_number_displayed; |
441 | ||
442 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 443 | |
14510fee | 444 | static int line_number_display_limit; |
5992c4f7 | 445 | |
5d121aec KH |
446 | /* line width to consider when repostioning for line number display */ |
447 | ||
448 | static int line_number_display_limit_width; | |
449 | ||
5f5c8ee5 GM |
450 | /* Number of lines to keep in the message log buffer. t means |
451 | infinite. nil means don't log at all. */ | |
452 | ||
5992c4f7 | 453 | Lisp_Object Vmessage_log_max; |
d45de95b | 454 | |
c6e89d6c GM |
455 | /* Current, index 0, and last displayed echo area message. Either |
456 | buffers from echo_buffers, or nil to indicate no message. */ | |
457 | ||
458 | Lisp_Object echo_area_buffer[2]; | |
459 | ||
460 | /* The buffers referenced from echo_area_buffer. */ | |
461 | ||
462 | static Lisp_Object echo_buffer[2]; | |
463 | ||
464 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
465 | ||
466 | static Lisp_Object Vwith_echo_area_save_vector; | |
467 | ||
468 | /* Non-zero means display_echo_area should display the last echo area | |
469 | message again. Set by redisplay_preserve_echo_area. */ | |
470 | ||
471 | static int display_last_displayed_message_p; | |
472 | ||
473 | /* Nonzero if echo area is being used by print; zero if being used by | |
474 | message. */ | |
475 | ||
476 | int message_buf_print; | |
477 | ||
9142dd5b GM |
478 | /* Maximum height for resizing mini-windows. Either a float |
479 | specifying a fraction of the available height, or an integer | |
480 | specifying a number of lines. */ | |
c6e89d6c GM |
481 | |
482 | static Lisp_Object Vmax_mini_window_height; | |
483 | ||
d6d26ed3 GM |
484 | /* Non-zero means we want a hollow cursor in windows that are not |
485 | selected. Zero means there's no cursor in such windows. */ | |
486 | ||
487 | int cursor_in_non_selected_windows; | |
488 | ||
5f5c8ee5 GM |
489 | /* A scratch glyph row with contents used for generating truncation |
490 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 491 | |
5f5c8ee5 GM |
492 | #define MAX_SCRATCH_GLYPHS 100 |
493 | struct glyph_row scratch_glyph_row; | |
494 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 495 | |
5f5c8ee5 GM |
496 | /* Ascent and height of the last line processed by move_it_to. */ |
497 | ||
498 | static int last_max_ascent, last_height; | |
499 | ||
500 | /* The maximum distance to look ahead for text properties. Values | |
501 | that are too small let us call compute_char_face and similar | |
502 | functions too often which is expensive. Values that are too large | |
503 | let us call compute_char_face and alike too often because we | |
504 | might not be interested in text properties that far away. */ | |
505 | ||
506 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
507 | ||
508 | /* Non-zero means print traces of redisplay if compiled with | |
509 | GLYPH_DEBUG != 0. */ | |
510 | ||
511 | #if GLYPH_DEBUG | |
512 | int trace_redisplay_p; | |
513 | #endif | |
514 | ||
515 | /* Value returned from text property handlers (see below). */ | |
516 | ||
517 | enum prop_handled | |
3c6595e0 | 518 | { |
5f5c8ee5 GM |
519 | HANDLED_NORMALLY, |
520 | HANDLED_RECOMPUTE_PROPS, | |
521 | HANDLED_OVERLAY_STRING_CONSUMED, | |
522 | HANDLED_RETURN | |
523 | }; | |
3c6595e0 | 524 | |
5f5c8ee5 GM |
525 | /* A description of text properties that redisplay is interested |
526 | in. */ | |
3c6595e0 | 527 | |
5f5c8ee5 GM |
528 | struct props |
529 | { | |
530 | /* The name of the property. */ | |
531 | Lisp_Object *name; | |
90adcf20 | 532 | |
5f5c8ee5 GM |
533 | /* A unique index for the property. */ |
534 | enum prop_idx idx; | |
535 | ||
536 | /* A handler function called to set up iterator IT from the property | |
537 | at IT's current position. Value is used to steer handle_stop. */ | |
538 | enum prop_handled (*handler) P_ ((struct it *it)); | |
539 | }; | |
540 | ||
541 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
542 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
543 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 544 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
545 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
546 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
547 | ||
548 | /* Properties handled by iterators. */ | |
549 | ||
550 | static struct props it_props[] = | |
5992c4f7 | 551 | { |
5f5c8ee5 GM |
552 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
553 | /* Handle `face' before `display' because some sub-properties of | |
554 | `display' need to know the face. */ | |
555 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
556 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
557 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 558 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
559 | {NULL, 0, NULL} |
560 | }; | |
5992c4f7 | 561 | |
5f5c8ee5 GM |
562 | /* Value is the position described by X. If X is a marker, value is |
563 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 564 | |
5f5c8ee5 | 565 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 566 | |
5f5c8ee5 | 567 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 568 | |
5f5c8ee5 GM |
569 | enum move_it_result |
570 | { | |
571 | /* Not used. Undefined value. */ | |
572 | MOVE_UNDEFINED, | |
bab29e15 | 573 | |
5f5c8ee5 GM |
574 | /* Move ended at the requested buffer position or ZV. */ |
575 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 576 | |
5f5c8ee5 GM |
577 | /* Move ended at the requested X pixel position. */ |
578 | MOVE_X_REACHED, | |
12adba34 | 579 | |
5f5c8ee5 GM |
580 | /* Move within a line ended at the end of a line that must be |
581 | continued. */ | |
582 | MOVE_LINE_CONTINUED, | |
583 | ||
584 | /* Move within a line ended at the end of a line that would | |
585 | be displayed truncated. */ | |
586 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 587 | |
5f5c8ee5 GM |
588 | /* Move within a line ended at a line end. */ |
589 | MOVE_NEWLINE_OR_CR | |
590 | }; | |
12adba34 | 591 | |
ff6c30e5 | 592 | |
5f5c8ee5 GM |
593 | \f |
594 | /* Function prototypes. */ | |
595 | ||
5bcfeb49 | 596 | static void ensure_echo_area_buffers P_ ((void)); |
e037b9ec GM |
597 | static struct glyph_row *row_containing_pos P_ ((struct window *, int, |
598 | struct glyph_row *, | |
599 | struct glyph_row *)); | |
c6e89d6c GM |
600 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
601 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
c6e89d6c GM |
602 | static void clear_garbaged_frames P_ ((void)); |
603 | static int current_message_1 P_ ((Lisp_Object *)); | |
604 | static int truncate_message_1 P_ ((int)); | |
605 | static int set_message_1 P_ ((char *s, Lisp_Object, int, int)); | |
606 | static int display_echo_area P_ ((struct window *)); | |
607 | static int display_echo_area_1 P_ ((struct window *)); | |
28514cd9 | 608 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 609 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
610 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
611 | struct text_pos)); | |
612 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
613 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
614 | static Lisp_Object eval_form P_ ((Lisp_Object)); | |
615 | static void insert_left_trunc_glyphs P_ ((struct it *)); | |
616 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
617 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 618 | static int append_space P_ ((struct it *, int)); |
5f5c8ee5 GM |
619 | static void make_cursor_line_fully_visible P_ ((struct window *)); |
620 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
621 | static int trailing_whitespace_p P_ ((int)); | |
622 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
623 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
624 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
625 | static void push_it P_ ((struct it *)); | |
626 | static void pop_it P_ ((struct it *)); | |
627 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
628 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 629 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
630 | static void redisplay_windows P_ ((Lisp_Object)); |
631 | static void redisplay_window P_ ((Lisp_Object, int)); | |
632 | static void update_menu_bar P_ ((struct frame *, int)); | |
633 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
634 | static int try_window_id P_ ((struct window *)); | |
635 | static int display_line P_ ((struct it *)); | |
636 | static void display_mode_lines P_ ((struct window *)); | |
637 | static void display_mode_line P_ ((struct window *, enum face_id, | |
638 | Lisp_Object)); | |
639 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
68c45bf0 | 640 | static char *decode_mode_spec P_ ((struct window *, int, int, int)); |
5f5c8ee5 GM |
641 | static void display_menu_bar P_ ((struct window *)); |
642 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
643 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
644 | int, int, struct it *, int, int, int, int)); | |
645 | static void compute_line_metrics P_ ((struct it *)); | |
646 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
647 | static int get_overlay_strings P_ ((struct it *)); | |
648 | static void next_overlay_string P_ ((struct it *)); | |
649 | void set_iterator_to_next P_ ((struct it *)); | |
650 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
651 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
652 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
653 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 654 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
655 | static int next_element_from_display_vector P_ ((struct it *)); |
656 | static int next_element_from_string P_ ((struct it *)); | |
657 | static int next_element_from_c_string P_ ((struct it *)); | |
658 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 659 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
660 | static int next_element_from_image P_ ((struct it *)); |
661 | static int next_element_from_stretch P_ ((struct it *)); | |
662 | static void load_overlay_strings P_ ((struct it *)); | |
663 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
664 | struct display_pos *)); | |
665 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
666 | Lisp_Object, int, int, int, int)); | |
5f5c8ee5 GM |
667 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, |
668 | int, int, int)); | |
669 | void move_it_vertically_backward P_ ((struct it *, int)); | |
670 | static void init_to_row_start P_ ((struct it *, struct window *, | |
671 | struct glyph_row *)); | |
672 | static void init_to_row_end P_ ((struct it *, struct window *, | |
673 | struct glyph_row *)); | |
674 | static void back_to_previous_line_start P_ ((struct it *)); | |
675 | static void forward_to_next_line_start P_ ((struct it *)); | |
676 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
677 | Lisp_Object, int)); | |
678 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
679 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
680 | static int number_of_chars P_ ((unsigned char *, int)); | |
681 | static void compute_stop_pos P_ ((struct it *)); | |
682 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
683 | Lisp_Object)); | |
684 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
685 | static int next_overlay_change P_ ((int)); | |
686 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
687 | Lisp_Object, struct text_pos *)); | |
688 | ||
689 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
690 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 691 | |
5f5c8ee5 | 692 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 693 | |
e037b9ec GM |
694 | static void update_tool_bar P_ ((struct frame *, int)); |
695 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
696 | static int redisplay_tool_bar P_ ((struct frame *)); | |
697 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 698 | |
5f5c8ee5 | 699 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 700 | |
5f5c8ee5 GM |
701 | \f |
702 | /*********************************************************************** | |
703 | Window display dimensions | |
704 | ***********************************************************************/ | |
12adba34 | 705 | |
5f5c8ee5 GM |
706 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
707 | text in window W. This is the height of W minus the height of a | |
708 | mode line, if any. */ | |
709 | ||
710 | INLINE int | |
711 | window_text_bottom_y (w) | |
712 | struct window *w; | |
713 | { | |
714 | struct frame *f = XFRAME (w->frame); | |
715 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
716 | ||
717 | if (WINDOW_WANTS_MODELINE_P (w)) | |
718 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
719 | return height; | |
f88eb0b6 KH |
720 | } |
721 | ||
f82aff7c | 722 | |
5f5c8ee5 GM |
723 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
724 | means return the total width of W, not including bitmap areas to | |
725 | the left and right of the window. */ | |
ff6c30e5 | 726 | |
5f5c8ee5 GM |
727 | INLINE int |
728 | window_box_width (w, area) | |
729 | struct window *w; | |
730 | int area; | |
731 | { | |
732 | struct frame *f = XFRAME (w->frame); | |
733 | int width = XFASTINT (w->width); | |
734 | ||
735 | if (!w->pseudo_window_p) | |
ff6c30e5 | 736 | { |
050d82d7 | 737 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FLAGS_AREA_COLS (f); |
5f5c8ee5 GM |
738 | |
739 | if (area == TEXT_AREA) | |
740 | { | |
741 | if (INTEGERP (w->left_margin_width)) | |
742 | width -= XFASTINT (w->left_margin_width); | |
743 | if (INTEGERP (w->right_margin_width)) | |
744 | width -= XFASTINT (w->right_margin_width); | |
745 | } | |
746 | else if (area == LEFT_MARGIN_AREA) | |
747 | width = (INTEGERP (w->left_margin_width) | |
748 | ? XFASTINT (w->left_margin_width) : 0); | |
749 | else if (area == RIGHT_MARGIN_AREA) | |
750 | width = (INTEGERP (w->right_margin_width) | |
751 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 752 | } |
5f5c8ee5 GM |
753 | |
754 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 755 | } |
1adc55de | 756 | |
1adc55de | 757 | |
5f5c8ee5 GM |
758 | /* Return the pixel height of the display area of window W, not |
759 | including mode lines of W, if any.. */ | |
f88eb0b6 | 760 | |
5f5c8ee5 GM |
761 | INLINE int |
762 | window_box_height (w) | |
763 | struct window *w; | |
f88eb0b6 | 764 | { |
5f5c8ee5 GM |
765 | struct frame *f = XFRAME (w->frame); |
766 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
767 | ||
768 | if (WINDOW_WANTS_MODELINE_P (w)) | |
769 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
770 | ||
045dee35 GM |
771 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
772 | height -= CURRENT_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
773 | |
774 | return height; | |
5992c4f7 KH |
775 | } |
776 | ||
777 | ||
5f5c8ee5 GM |
778 | /* Return the frame-relative coordinate of the left edge of display |
779 | area AREA of window W. AREA < 0 means return the left edge of the | |
780 | whole window, to the right of any bitmap area at the left side of | |
781 | W. */ | |
5992c4f7 | 782 | |
5f5c8ee5 GM |
783 | INLINE int |
784 | window_box_left (w, area) | |
785 | struct window *w; | |
786 | int area; | |
90adcf20 | 787 | { |
5f5c8ee5 GM |
788 | struct frame *f = XFRAME (w->frame); |
789 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 790 | |
5f5c8ee5 | 791 | if (!w->pseudo_window_p) |
90adcf20 | 792 | { |
5f5c8ee5 | 793 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
050d82d7 | 794 | + FRAME_LEFT_FLAGS_AREA_WIDTH (f)); |
5f5c8ee5 GM |
795 | |
796 | if (area == TEXT_AREA) | |
797 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
798 | else if (area == RIGHT_MARGIN_AREA) | |
799 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
800 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 801 | } |
73af359d | 802 | |
5f5c8ee5 GM |
803 | return x; |
804 | } | |
90adcf20 | 805 | |
b6436d4e | 806 | |
5f5c8ee5 GM |
807 | /* Return the frame-relative coordinate of the right edge of display |
808 | area AREA of window W. AREA < 0 means return the left edge of the | |
809 | whole window, to the left of any bitmap area at the right side of | |
810 | W. */ | |
ded34426 | 811 | |
5f5c8ee5 GM |
812 | INLINE int |
813 | window_box_right (w, area) | |
814 | struct window *w; | |
815 | int area; | |
816 | { | |
817 | return window_box_left (w, area) + window_box_width (w, area); | |
818 | } | |
819 | ||
820 | ||
821 | /* Get the bounding box of the display area AREA of window W, without | |
822 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
823 | whole window, not including bitmap areas to the left and right of | |
824 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
825 | coordinates of the upper-left corner of the box. Return in | |
826 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
827 | ||
828 | INLINE void | |
829 | window_box (w, area, box_x, box_y, box_width, box_height) | |
830 | struct window *w; | |
831 | int area; | |
832 | int *box_x, *box_y, *box_width, *box_height; | |
833 | { | |
834 | struct frame *f = XFRAME (w->frame); | |
835 | ||
836 | *box_width = window_box_width (w, area); | |
837 | *box_height = window_box_height (w); | |
838 | *box_x = window_box_left (w, area); | |
839 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
840 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
841 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
842 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 843 | } |
1adc55de | 844 | |
1adc55de | 845 | |
5f5c8ee5 GM |
846 | /* Get the bounding box of the display area AREA of window W, without |
847 | mode lines. AREA < 0 means the whole window, not including bitmap | |
848 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
849 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
850 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
851 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
852 | box. */ | |
ded34426 | 853 | |
5f5c8ee5 GM |
854 | INLINE void |
855 | window_box_edges (w, area, top_left_x, top_left_y, | |
856 | bottom_right_x, bottom_right_y) | |
857 | struct window *w; | |
858 | int area; | |
859 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 860 | { |
5f5c8ee5 GM |
861 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
862 | bottom_right_y); | |
863 | *bottom_right_x += *top_left_x; | |
864 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
865 | } |
866 | ||
5f5c8ee5 GM |
867 | |
868 | \f | |
869 | /*********************************************************************** | |
870 | Utilities | |
871 | ***********************************************************************/ | |
872 | ||
4fdb80f2 GM |
873 | /* Return the next character from STR which is MAXLEN bytes long. |
874 | Return in *LEN the length of the character. This is like | |
875 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
876 | we find one, we return a `?', but with the length of the illegal | |
877 | character. */ | |
878 | ||
879 | static INLINE int | |
7a5b8a93 | 880 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 881 | unsigned char *str; |
7a5b8a93 | 882 | int maxlen, *len; |
4fdb80f2 GM |
883 | { |
884 | int c; | |
885 | ||
886 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
887 | if (!CHAR_VALID_P (c, 1)) | |
888 | /* We may not change the length here because other places in Emacs | |
889 | don't use this function, i.e. they silently accept illegal | |
890 | characters. */ | |
891 | c = '?'; | |
892 | ||
893 | return c; | |
894 | } | |
895 | ||
896 | ||
897 | ||
5f5c8ee5 GM |
898 | /* Given a position POS containing a valid character and byte position |
899 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
900 | ||
901 | static struct text_pos | |
902 | string_pos_nchars_ahead (pos, string, nchars) | |
903 | struct text_pos pos; | |
904 | Lisp_Object string; | |
905 | int nchars; | |
0b1005ef | 906 | { |
5f5c8ee5 GM |
907 | xassert (STRINGP (string) && nchars >= 0); |
908 | ||
909 | if (STRING_MULTIBYTE (string)) | |
910 | { | |
911 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
912 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
913 | int len; | |
914 | ||
915 | while (nchars--) | |
916 | { | |
4fdb80f2 | 917 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
918 | p += len, rest -= len; |
919 | xassert (rest >= 0); | |
920 | CHARPOS (pos) += 1; | |
921 | BYTEPOS (pos) += len; | |
922 | } | |
923 | } | |
924 | else | |
925 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
926 | ||
927 | return pos; | |
0a9dc68b RS |
928 | } |
929 | ||
0a9dc68b | 930 | |
5f5c8ee5 GM |
931 | /* Value is the text position, i.e. character and byte position, |
932 | for character position CHARPOS in STRING. */ | |
933 | ||
934 | static INLINE struct text_pos | |
935 | string_pos (charpos, string) | |
936 | int charpos; | |
0a9dc68b | 937 | Lisp_Object string; |
0a9dc68b | 938 | { |
5f5c8ee5 GM |
939 | struct text_pos pos; |
940 | xassert (STRINGP (string)); | |
941 | xassert (charpos >= 0); | |
942 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
943 | return pos; | |
944 | } | |
945 | ||
946 | ||
947 | /* Value is a text position, i.e. character and byte position, for | |
948 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
949 | means recognize multibyte characters. */ | |
950 | ||
951 | static struct text_pos | |
952 | c_string_pos (charpos, s, multibyte_p) | |
953 | int charpos; | |
954 | unsigned char *s; | |
955 | int multibyte_p; | |
956 | { | |
957 | struct text_pos pos; | |
958 | ||
959 | xassert (s != NULL); | |
960 | xassert (charpos >= 0); | |
961 | ||
962 | if (multibyte_p) | |
0a9dc68b | 963 | { |
5f5c8ee5 GM |
964 | int rest = strlen (s), len; |
965 | ||
966 | SET_TEXT_POS (pos, 0, 0); | |
967 | while (charpos--) | |
0a9dc68b | 968 | { |
4fdb80f2 | 969 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
970 | s += len, rest -= len; |
971 | xassert (rest >= 0); | |
972 | CHARPOS (pos) += 1; | |
973 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
974 | } |
975 | } | |
5f5c8ee5 GM |
976 | else |
977 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 978 | |
5f5c8ee5 GM |
979 | return pos; |
980 | } | |
0a9dc68b | 981 | |
0a9dc68b | 982 | |
5f5c8ee5 GM |
983 | /* Value is the number of characters in C string S. MULTIBYTE_P |
984 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 985 | |
5f5c8ee5 GM |
986 | static int |
987 | number_of_chars (s, multibyte_p) | |
988 | unsigned char *s; | |
989 | int multibyte_p; | |
990 | { | |
991 | int nchars; | |
992 | ||
993 | if (multibyte_p) | |
994 | { | |
995 | int rest = strlen (s), len; | |
996 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 997 | |
5f5c8ee5 GM |
998 | for (nchars = 0; rest > 0; ++nchars) |
999 | { | |
4fdb80f2 | 1000 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1001 | rest -= len, p += len; |
0a9dc68b RS |
1002 | } |
1003 | } | |
5f5c8ee5 GM |
1004 | else |
1005 | nchars = strlen (s); | |
1006 | ||
1007 | return nchars; | |
0b1005ef KH |
1008 | } |
1009 | ||
5f5c8ee5 GM |
1010 | |
1011 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1012 | NEWPOS->charpos. POS is a known position in string STRING. | |
1013 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1014 | |
5f5c8ee5 GM |
1015 | static void |
1016 | compute_string_pos (newpos, pos, string) | |
1017 | struct text_pos *newpos, pos; | |
1018 | Lisp_Object string; | |
76412d64 | 1019 | { |
5f5c8ee5 GM |
1020 | xassert (STRINGP (string)); |
1021 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1022 | ||
1023 | if (STRING_MULTIBYTE (string)) | |
1024 | *newpos = string_pos_nchars_ahead (pos, CHARPOS (*newpos) - CHARPOS (pos), | |
1025 | string); | |
1026 | else | |
1027 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1028 | } |
1029 | ||
9c74a0dd | 1030 | |
5f5c8ee5 GM |
1031 | \f |
1032 | /*********************************************************************** | |
1033 | Lisp form evaluation | |
1034 | ***********************************************************************/ | |
1035 | ||
1036 | /* Error handler for eval_form. */ | |
1037 | ||
1038 | static Lisp_Object | |
1039 | eval_handler (arg) | |
1040 | Lisp_Object arg; | |
1041 | { | |
1042 | return Qnil; | |
1043 | } | |
1044 | ||
1045 | ||
1046 | /* Evaluate SEXPR and return the result, or nil if something went | |
1047 | wrong. */ | |
1048 | ||
1049 | static Lisp_Object | |
1050 | eval_form (sexpr) | |
1051 | Lisp_Object sexpr; | |
1052 | { | |
1053 | int count = specpdl_ptr - specpdl; | |
1054 | Lisp_Object val; | |
1055 | specbind (Qinhibit_redisplay, Qt); | |
1056 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
1057 | return unbind_to (count, val); | |
1058 | } | |
1059 | ||
1060 | ||
1061 | \f | |
1062 | /*********************************************************************** | |
1063 | Debugging | |
1064 | ***********************************************************************/ | |
1065 | ||
1066 | #if 0 | |
1067 | ||
1068 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1069 | This is for debugging. It is too slow to do unconditionally. */ | |
1070 | ||
1071 | static void | |
1072 | check_it (it) | |
1073 | struct it *it; | |
1074 | { | |
1075 | if (it->method == next_element_from_string) | |
a2889657 | 1076 | { |
5f5c8ee5 GM |
1077 | xassert (STRINGP (it->string)); |
1078 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1079 | } | |
1080 | else if (it->method == next_element_from_buffer) | |
1081 | { | |
1082 | /* Check that character and byte positions agree. */ | |
1083 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1084 | } | |
73af359d | 1085 | |
5f5c8ee5 GM |
1086 | if (it->dpvec) |
1087 | xassert (it->current.dpvec_index >= 0); | |
1088 | else | |
1089 | xassert (it->current.dpvec_index < 0); | |
1090 | } | |
1f40cad2 | 1091 | |
5f5c8ee5 GM |
1092 | #define CHECK_IT(IT) check_it ((IT)) |
1093 | ||
1094 | #else /* not 0 */ | |
1095 | ||
1096 | #define CHECK_IT(IT) (void) 0 | |
1097 | ||
1098 | #endif /* not 0 */ | |
1099 | ||
1100 | ||
1101 | #if GLYPH_DEBUG | |
1102 | ||
1103 | /* Check that the window end of window W is what we expect it | |
1104 | to be---the last row in the current matrix displaying text. */ | |
1105 | ||
1106 | static void | |
1107 | check_window_end (w) | |
1108 | struct window *w; | |
1109 | { | |
1110 | if (!MINI_WINDOW_P (w) | |
1111 | && !NILP (w->window_end_valid)) | |
1112 | { | |
1113 | struct glyph_row *row; | |
1114 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1115 | XFASTINT (w->window_end_vpos)), | |
1116 | !row->enabled_p | |
1117 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1118 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1123 | ||
1124 | #else /* not GLYPH_DEBUG */ | |
1125 | ||
1126 | #define CHECK_WINDOW_END(W) (void) 0 | |
1127 | ||
1128 | #endif /* not GLYPH_DEBUG */ | |
1129 | ||
1130 | ||
1131 | \f | |
1132 | /*********************************************************************** | |
1133 | Iterator initialization | |
1134 | ***********************************************************************/ | |
1135 | ||
1136 | /* Initialize IT for displaying current_buffer in window W, starting | |
1137 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1138 | position is specified which is useful when the iterator is assigned | |
1139 | a position later. BYTEPOS is the byte position corresponding to | |
1140 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1141 | ||
1142 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1143 | will produce glyphs in that row. | |
1144 | ||
1145 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1146 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
045dee35 | 1147 | HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for |
e037b9ec | 1148 | displaying the tool-bar. |
5f5c8ee5 GM |
1149 | |
1150 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
045dee35 | 1151 | HEADER_LINE_FACE_ID, the iterator will be initialized to use the |
5f5c8ee5 GM |
1152 | corresponding mode line glyph row of the desired matrix of W. */ |
1153 | ||
1154 | void | |
1155 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1156 | struct it *it; | |
1157 | struct window *w; | |
1158 | int charpos, bytepos; | |
1159 | struct glyph_row *row; | |
1160 | enum face_id base_face_id; | |
1161 | { | |
1162 | int highlight_region_p; | |
5f5c8ee5 GM |
1163 | |
1164 | /* Some precondition checks. */ | |
1165 | xassert (w != NULL && it != NULL); | |
5f5c8ee5 GM |
1166 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); |
1167 | ||
1168 | /* If face attributes have been changed since the last redisplay, | |
1169 | free realized faces now because they depend on face definitions | |
1170 | that might have changed. */ | |
1171 | if (face_change_count) | |
1172 | { | |
1173 | face_change_count = 0; | |
1174 | free_all_realized_faces (Qnil); | |
1175 | } | |
1176 | ||
1177 | /* Use one of the mode line rows of W's desired matrix if | |
1178 | appropriate. */ | |
1179 | if (row == NULL) | |
1180 | { | |
1181 | if (base_face_id == MODE_LINE_FACE_ID) | |
1182 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
045dee35 GM |
1183 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1184 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1185 | } |
1186 | ||
1187 | /* Clear IT. */ | |
1188 | bzero (it, sizeof *it); | |
1189 | it->current.overlay_string_index = -1; | |
1190 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
1191 | it->base_face_id = base_face_id; |
1192 | ||
1193 | /* The window in which we iterate over current_buffer: */ | |
1194 | XSETWINDOW (it->window, w); | |
1195 | it->w = w; | |
1196 | it->f = XFRAME (w->frame); | |
1197 | ||
1198 | /* If realized faces have been removed, e.g. because of face | |
1199 | attribute changes of named faces, recompute them. */ | |
1200 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1201 | recompute_basic_faces (it->f); | |
1202 | ||
5f5c8ee5 GM |
1203 | /* Current value of the `space-width', and 'height' properties. */ |
1204 | it->space_width = Qnil; | |
1205 | it->font_height = Qnil; | |
1206 | ||
1207 | /* Are control characters displayed as `^C'? */ | |
1208 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1209 | ||
1210 | /* -1 means everything between a CR and the following line end | |
1211 | is invisible. >0 means lines indented more than this value are | |
1212 | invisible. */ | |
1213 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1214 | ? XFASTINT (current_buffer->selective_display) | |
1215 | : (!NILP (current_buffer->selective_display) | |
1216 | ? -1 : 0)); | |
1217 | it->selective_display_ellipsis_p | |
1218 | = !NILP (current_buffer->selective_display_ellipses); | |
1219 | ||
1220 | /* Display table to use. */ | |
1221 | it->dp = window_display_table (w); | |
1222 | ||
1223 | /* Are multibyte characters enabled in current_buffer? */ | |
1224 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1225 | ||
1226 | /* Non-zero if we should highlight the region. */ | |
1227 | highlight_region_p | |
1228 | = (!NILP (Vtransient_mark_mode) | |
1229 | && !NILP (current_buffer->mark_active) | |
1230 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1231 | ||
1232 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1233 | start and end of a visible region in window IT->w. Set both to | |
1234 | -1 to indicate no region. */ | |
1235 | if (highlight_region_p | |
1236 | /* Maybe highlight only in selected window. */ | |
1237 | && (/* Either show region everywhere. */ | |
1238 | highlight_nonselected_windows | |
1239 | /* Or show region in the selected window. */ | |
1240 | || w == XWINDOW (selected_window) | |
1241 | /* Or show the region if we are in the mini-buffer and W is | |
1242 | the window the mini-buffer refers to. */ | |
1243 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1244 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1245 | { | |
1246 | int charpos = marker_position (current_buffer->mark); | |
1247 | it->region_beg_charpos = min (PT, charpos); | |
1248 | it->region_end_charpos = max (PT, charpos); | |
1249 | } | |
1250 | else | |
1251 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1252 | ||
1253 | /* Get the position at which the redisplay_end_trigger hook should | |
1254 | be run, if it is to be run at all. */ | |
1255 | if (MARKERP (w->redisplay_end_trigger) | |
1256 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1257 | it->redisplay_end_trigger_charpos | |
1258 | = marker_position (w->redisplay_end_trigger); | |
1259 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1260 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1261 | ||
1262 | /* Correct bogus values of tab_width. */ | |
1263 | it->tab_width = XINT (current_buffer->tab_width); | |
1264 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1265 | it->tab_width = 8; | |
1266 | ||
1267 | /* Are lines in the display truncated? */ | |
1268 | it->truncate_lines_p | |
1269 | = (base_face_id != DEFAULT_FACE_ID | |
1270 | || XINT (it->w->hscroll) | |
1271 | || (truncate_partial_width_windows | |
1272 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1273 | || !NILP (current_buffer->truncate_lines)); | |
1274 | ||
1275 | /* Get dimensions of truncation and continuation glyphs. These are | |
1276 | displayed as bitmaps under X, so we don't need them for such | |
1277 | frames. */ | |
1278 | if (!FRAME_WINDOW_P (it->f)) | |
1279 | { | |
1280 | if (it->truncate_lines_p) | |
1281 | { | |
1282 | /* We will need the truncation glyph. */ | |
1283 | xassert (it->glyph_row == NULL); | |
1284 | produce_special_glyphs (it, IT_TRUNCATION); | |
1285 | it->truncation_pixel_width = it->pixel_width; | |
1286 | } | |
1287 | else | |
1288 | { | |
1289 | /* We will need the continuation glyph. */ | |
1290 | xassert (it->glyph_row == NULL); | |
1291 | produce_special_glyphs (it, IT_CONTINUATION); | |
1292 | it->continuation_pixel_width = it->pixel_width; | |
1293 | } | |
1294 | ||
1295 | /* Reset these values to zero becaue the produce_special_glyphs | |
1296 | above has changed them. */ | |
1297 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1298 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1299 | } |
1300 | ||
1301 | /* Set this after getting the dimensions of truncation and | |
1302 | continuation glyphs, so that we don't produce glyphs when calling | |
1303 | produce_special_glyphs, above. */ | |
1304 | it->glyph_row = row; | |
1305 | it->area = TEXT_AREA; | |
1306 | ||
1307 | /* Get the dimensions of the display area. The display area | |
1308 | consists of the visible window area plus a horizontally scrolled | |
1309 | part to the left of the window. All x-values are relative to the | |
1310 | start of this total display area. */ | |
1311 | if (base_face_id != DEFAULT_FACE_ID) | |
1312 | { | |
1313 | /* Mode lines, menu bar in terminal frames. */ | |
1314 | it->first_visible_x = 0; | |
1315 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1316 | } | |
1317 | else | |
1318 | { | |
1319 | it->first_visible_x | |
1320 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1321 | it->last_visible_x = (it->first_visible_x | |
1322 | + window_box_width (w, TEXT_AREA)); | |
1323 | ||
1324 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1325 | the right margin. Otherwise, leave room for the continuation | |
1326 | glyph(s). Truncation and continuation glyphs are not inserted | |
1327 | for window-based redisplay. */ | |
1328 | if (!FRAME_WINDOW_P (it->f)) | |
1329 | { | |
1330 | if (it->truncate_lines_p) | |
1331 | it->last_visible_x -= it->truncation_pixel_width; | |
1332 | else | |
1333 | it->last_visible_x -= it->continuation_pixel_width; | |
1334 | } | |
1335 | ||
045dee35 GM |
1336 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1337 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1338 | } |
1339 | ||
1340 | /* Leave room for a border glyph. */ | |
1341 | if (!FRAME_WINDOW_P (it->f) | |
1342 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1343 | it->last_visible_x -= 1; | |
1344 | ||
1345 | it->last_visible_y = window_text_bottom_y (w); | |
1346 | ||
1347 | /* For mode lines and alike, arrange for the first glyph having a | |
1348 | left box line if the face specifies a box. */ | |
1349 | if (base_face_id != DEFAULT_FACE_ID) | |
1350 | { | |
1351 | struct face *face; | |
1352 | ||
1353 | it->face_id = base_face_id; | |
1354 | ||
1355 | /* If we have a boxed mode line, make the first character appear | |
1356 | with a left box line. */ | |
1357 | face = FACE_FROM_ID (it->f, base_face_id); | |
1358 | if (face->box != FACE_NO_BOX) | |
1359 | it->start_of_box_run_p = 1; | |
1360 | } | |
1361 | ||
1362 | /* If a buffer position was specified, set the iterator there, | |
1363 | getting overlays and face properties from that position. */ | |
1364 | if (charpos > 0) | |
1365 | { | |
1366 | it->end_charpos = ZV; | |
1367 | it->face_id = -1; | |
1368 | IT_CHARPOS (*it) = charpos; | |
1369 | ||
1370 | /* Compute byte position if not specified. */ | |
1371 | if (bytepos <= 0) | |
1372 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1373 | else | |
1374 | IT_BYTEPOS (*it) = bytepos; | |
1375 | ||
1376 | /* Compute faces etc. */ | |
1377 | reseat (it, it->current.pos, 1); | |
1378 | } | |
1379 | ||
1380 | CHECK_IT (it); | |
1381 | } | |
1382 | ||
1383 | ||
1384 | /* Initialize IT for the display of window W with window start POS. */ | |
1385 | ||
1386 | void | |
1387 | start_display (it, w, pos) | |
1388 | struct it *it; | |
1389 | struct window *w; | |
1390 | struct text_pos pos; | |
1391 | { | |
1392 | int start_at_line_beg_p; | |
1393 | struct glyph_row *row; | |
045dee35 | 1394 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1395 | int first_y; |
1396 | ||
1397 | row = w->desired_matrix->rows + first_vpos; | |
1398 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1399 | first_y = it->current_y; | |
1400 | ||
1401 | /* If window start is not at a line start, move back to the line | |
1402 | start. This makes sure that we take continuation lines into | |
1403 | account. */ | |
1404 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1405 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1406 | if (!start_at_line_beg_p) | |
1407 | reseat_at_previous_visible_line_start (it); | |
1408 | ||
5f5c8ee5 GM |
1409 | /* If window start is not at a line start, skip forward to POS to |
1410 | get the correct continuation_lines_width and current_x. */ | |
1411 | if (!start_at_line_beg_p) | |
1412 | { | |
1413 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1414 | ||
1415 | /* If lines are continued, this line may end in the middle of a | |
1416 | multi-glyph character (e.g. a control character displayed as | |
1417 | \003, or in the middle of an overlay string). In this case | |
1418 | move_it_to above will not have taken us to the start of | |
1419 | the continuation line but to the end of the continued line. */ | |
1420 | if (!it->truncate_lines_p && it->current_x > 0) | |
1421 | { | |
1422 | if (it->current.dpvec_index >= 0 | |
1423 | || it->current.overlay_string_index >= 0) | |
1424 | { | |
1425 | set_iterator_to_next (it); | |
1426 | move_it_in_display_line_to (it, -1, -1, 0); | |
1427 | } | |
1428 | it->continuation_lines_width += it->current_x; | |
1429 | } | |
1430 | ||
1431 | it->current_y = first_y; | |
1432 | it->vpos = 0; | |
1433 | it->current_x = it->hpos = 0; | |
1434 | } | |
1435 | ||
1436 | #if 0 /* Don't assert the following because start_display is sometimes | |
1437 | called intentionally with a window start that is not at a | |
1438 | line start. Please leave this code in as a comment. */ | |
1439 | ||
1440 | /* Window start should be on a line start, now. */ | |
1441 | xassert (it->continuation_lines_width | |
1442 | || IT_CHARPOS (it) == BEGV | |
1443 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1444 | #endif /* 0 */ | |
1445 | } | |
1446 | ||
1447 | ||
1448 | /* Initialize IT for stepping through current_buffer in window W, | |
1449 | starting at position POS that includes overlay string and display | |
1450 | vector/ control character translation position information. */ | |
1451 | ||
1452 | static void | |
1453 | init_from_display_pos (it, w, pos) | |
1454 | struct it *it; | |
1455 | struct window *w; | |
1456 | struct display_pos *pos; | |
1457 | { | |
1458 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1459 | text, so we might end up at a position different from POS. This | |
1460 | is only a problem when POS is a row start after a newline and an | |
1461 | overlay starts there with an after-string, and the overlay has an | |
1462 | invisible property. Since we don't skip invisible text in | |
1463 | display_line and elsewhere immediately after consuming the | |
1464 | newline before the row start, such a POS will not be in a string, | |
1465 | but the call to init_iterator below will move us to the | |
1466 | after-string. */ | |
1467 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1468 | NULL, DEFAULT_FACE_ID); | |
1469 | ||
1470 | /* If position is within an overlay string, set up IT to | |
1471 | the right overlay string. */ | |
1472 | if (pos->overlay_string_index >= 0) | |
1473 | { | |
1474 | int relative_index; | |
1475 | ||
1476 | /* We already have the first chunk of overlay strings in | |
1477 | IT->overlay_strings. Load more until the one for | |
1478 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1479 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1480 | { | |
1481 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1482 | it->current.overlay_string_index = 0; | |
1483 | while (n--) | |
1484 | { | |
1485 | load_overlay_strings (it); | |
1486 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | it->current.overlay_string_index = pos->overlay_string_index; | |
1491 | relative_index = (it->current.overlay_string_index | |
1492 | % OVERLAY_STRING_CHUNK_SIZE); | |
1493 | it->string = it->overlay_strings[relative_index]; | |
1494 | it->current.string_pos = pos->string_pos; | |
1495 | it->method = next_element_from_string; | |
1496 | } | |
1497 | else if (CHARPOS (pos->string_pos) >= 0) | |
1498 | { | |
1499 | /* Recorded position is not in an overlay string, but in another | |
1500 | string. This can only be a string from a `display' property. | |
1501 | IT should already be filled with that string. */ | |
1502 | it->current.string_pos = pos->string_pos; | |
1503 | xassert (STRINGP (it->string)); | |
1504 | } | |
1505 | ||
1506 | /* Restore position in display vector translations or control | |
1507 | character translations. */ | |
1508 | if (pos->dpvec_index >= 0) | |
1509 | { | |
1510 | /* This fills IT->dpvec. */ | |
1511 | get_next_display_element (it); | |
1512 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1513 | it->current.dpvec_index = pos->dpvec_index; | |
1514 | } | |
1515 | ||
1516 | CHECK_IT (it); | |
1517 | } | |
1518 | ||
1519 | ||
1520 | /* Initialize IT for stepping through current_buffer in window W | |
1521 | starting at ROW->start. */ | |
1522 | ||
1523 | static void | |
1524 | init_to_row_start (it, w, row) | |
1525 | struct it *it; | |
1526 | struct window *w; | |
1527 | struct glyph_row *row; | |
1528 | { | |
1529 | init_from_display_pos (it, w, &row->start); | |
1530 | it->continuation_lines_width = row->continuation_lines_width; | |
1531 | CHECK_IT (it); | |
1532 | } | |
1533 | ||
1534 | ||
1535 | /* Initialize IT for stepping through current_buffer in window W | |
1536 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1537 | ||
1538 | static void | |
1539 | init_to_row_end (it, w, row) | |
1540 | struct it *it; | |
1541 | struct window *w; | |
1542 | struct glyph_row *row; | |
1543 | { | |
1544 | init_from_display_pos (it, w, &row->end); | |
1545 | ||
1546 | if (row->continued_p) | |
1547 | it->continuation_lines_width = (row->continuation_lines_width | |
1548 | + row->pixel_width); | |
1549 | CHECK_IT (it); | |
1550 | } | |
1551 | ||
1552 | ||
1553 | ||
1554 | \f | |
1555 | /*********************************************************************** | |
1556 | Text properties | |
1557 | ***********************************************************************/ | |
1558 | ||
1559 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1560 | overlay changes. Set IT->stop_charpos to the next position where | |
1561 | to stop. */ | |
1562 | ||
1563 | static void | |
1564 | handle_stop (it) | |
1565 | struct it *it; | |
1566 | { | |
1567 | enum prop_handled handled; | |
1568 | int handle_overlay_change_p = 1; | |
1569 | struct props *p; | |
1570 | ||
1571 | it->dpvec = NULL; | |
1572 | it->current.dpvec_index = -1; | |
1573 | ||
1574 | do | |
1575 | { | |
1576 | handled = HANDLED_NORMALLY; | |
1577 | ||
1578 | /* Call text property handlers. */ | |
1579 | for (p = it_props; p->handler; ++p) | |
1580 | { | |
1581 | handled = p->handler (it); | |
1582 | ||
1583 | if (handled == HANDLED_RECOMPUTE_PROPS) | |
1584 | break; | |
1585 | else if (handled == HANDLED_RETURN) | |
1586 | return; | |
1587 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1588 | handle_overlay_change_p = 0; | |
1589 | } | |
1590 | ||
1591 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1592 | { | |
1593 | /* Don't check for overlay strings below when set to deliver | |
1594 | characters from a display vector. */ | |
1595 | if (it->method == next_element_from_display_vector) | |
1596 | handle_overlay_change_p = 0; | |
1597 | ||
1598 | /* Handle overlay changes. */ | |
1599 | if (handle_overlay_change_p) | |
1600 | handled = handle_overlay_change (it); | |
1601 | ||
1602 | /* Determine where to stop next. */ | |
1603 | if (handled == HANDLED_NORMALLY) | |
1604 | compute_stop_pos (it); | |
1605 | } | |
1606 | } | |
1607 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1608 | } | |
1609 | ||
1610 | ||
1611 | /* Compute IT->stop_charpos from text property and overlay change | |
1612 | information for IT's current position. */ | |
1613 | ||
1614 | static void | |
1615 | compute_stop_pos (it) | |
1616 | struct it *it; | |
1617 | { | |
1618 | register INTERVAL iv, next_iv; | |
1619 | Lisp_Object object, limit, position; | |
1620 | ||
1621 | /* If nowhere else, stop at the end. */ | |
1622 | it->stop_charpos = it->end_charpos; | |
1623 | ||
1624 | if (STRINGP (it->string)) | |
1625 | { | |
1626 | /* Strings are usually short, so don't limit the search for | |
1627 | properties. */ | |
1628 | object = it->string; | |
1629 | limit = Qnil; | |
1630 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1631 | } | |
1632 | else | |
1633 | { | |
1634 | int charpos; | |
1635 | ||
1636 | /* If next overlay change is in front of the current stop pos | |
1637 | (which is IT->end_charpos), stop there. Note: value of | |
1638 | next_overlay_change is point-max if no overlay change | |
1639 | follows. */ | |
1640 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1641 | if (charpos < it->stop_charpos) | |
1642 | it->stop_charpos = charpos; | |
1643 | ||
1644 | /* If showing the region, we have to stop at the region | |
1645 | start or end because the face might change there. */ | |
1646 | if (it->region_beg_charpos > 0) | |
1647 | { | |
1648 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1649 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1650 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1651 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1652 | } | |
1653 | ||
1654 | /* Set up variables for computing the stop position from text | |
1655 | property changes. */ | |
1656 | XSETBUFFER (object, current_buffer); | |
1657 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1658 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1659 | ||
1660 | } | |
1661 | ||
1662 | /* Get the interval containing IT's position. Value is a null | |
1663 | interval if there isn't such an interval. */ | |
1664 | iv = validate_interval_range (object, &position, &position, 0); | |
1665 | if (!NULL_INTERVAL_P (iv)) | |
1666 | { | |
1667 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1668 | struct props *p; | |
1669 | ||
1670 | /* Get properties here. */ | |
1671 | for (p = it_props; p->handler; ++p) | |
1672 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1673 | ||
1674 | /* Look for an interval following iv that has different | |
1675 | properties. */ | |
1676 | for (next_iv = next_interval (iv); | |
1677 | (!NULL_INTERVAL_P (next_iv) | |
1678 | && (NILP (limit) | |
1679 | || XFASTINT (limit) > next_iv->position)); | |
1680 | next_iv = next_interval (next_iv)) | |
1681 | { | |
1682 | for (p = it_props; p->handler; ++p) | |
1683 | { | |
1684 | Lisp_Object new_value; | |
1685 | ||
1686 | new_value = textget (next_iv->plist, *p->name); | |
1687 | if (!EQ (values_here[p->idx], new_value)) | |
1688 | break; | |
1689 | } | |
1690 | ||
1691 | if (p->handler) | |
1692 | break; | |
1693 | } | |
1694 | ||
1695 | if (!NULL_INTERVAL_P (next_iv)) | |
1696 | { | |
1697 | if (INTEGERP (limit) | |
1698 | && next_iv->position >= XFASTINT (limit)) | |
1699 | /* No text property change up to limit. */ | |
1700 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1701 | else | |
1702 | /* Text properties change in next_iv. */ | |
1703 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | xassert (STRINGP (it->string) | |
1708 | || (it->stop_charpos >= BEGV | |
1709 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1710 | } | |
1711 | ||
1712 | ||
1713 | /* Return the position of the next overlay change after POS in | |
1714 | current_buffer. Value is point-max if no overlay change | |
1715 | follows. This is like `next-overlay-change' but doesn't use | |
1716 | xmalloc. */ | |
1717 | ||
1718 | static int | |
1719 | next_overlay_change (pos) | |
1720 | int pos; | |
1721 | { | |
1722 | int noverlays; | |
1723 | int endpos; | |
1724 | Lisp_Object *overlays; | |
1725 | int len; | |
1726 | int i; | |
1727 | ||
1728 | /* Get all overlays at the given position. */ | |
1729 | len = 10; | |
1730 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1731 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1732 | if (noverlays > len) | |
1733 | { | |
1734 | len = noverlays; | |
1735 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1736 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1737 | } | |
1738 | ||
1739 | /* If any of these overlays ends before endpos, | |
1740 | use its ending point instead. */ | |
1741 | for (i = 0; i < noverlays; ++i) | |
1742 | { | |
1743 | Lisp_Object oend; | |
1744 | int oendpos; | |
1745 | ||
1746 | oend = OVERLAY_END (overlays[i]); | |
1747 | oendpos = OVERLAY_POSITION (oend); | |
1748 | endpos = min (endpos, oendpos); | |
1749 | } | |
1750 | ||
1751 | return endpos; | |
1752 | } | |
1753 | ||
1754 | ||
1755 | \f | |
1756 | /*********************************************************************** | |
1757 | Fontification | |
1758 | ***********************************************************************/ | |
1759 | ||
1760 | /* Handle changes in the `fontified' property of the current buffer by | |
1761 | calling hook functions from Qfontification_functions to fontify | |
1762 | regions of text. */ | |
1763 | ||
1764 | static enum prop_handled | |
1765 | handle_fontified_prop (it) | |
1766 | struct it *it; | |
1767 | { | |
1768 | Lisp_Object prop, pos; | |
1769 | enum prop_handled handled = HANDLED_NORMALLY; | |
2bf6fa4b | 1770 | struct gcpro gcpro1; |
5f5c8ee5 GM |
1771 | |
1772 | /* Get the value of the `fontified' property at IT's current buffer | |
1773 | position. (The `fontified' property doesn't have a special | |
1774 | meaning in strings.) If the value is nil, call functions from | |
1775 | Qfontification_functions. */ | |
1776 | if (!STRINGP (it->string) | |
1777 | && it->s == NULL | |
1778 | && !NILP (Vfontification_functions) | |
1779 | && (pos = make_number (IT_CHARPOS (*it)), | |
1780 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1781 | NILP (prop))) | |
1782 | { | |
1783 | Lisp_Object args[2]; | |
1784 | ||
2bf6fa4b | 1785 | GCPRO1 (pos); |
5f5c8ee5 GM |
1786 | /* Run the hook functions. */ |
1787 | args[0] = Qfontification_functions; | |
1788 | args[1] = pos; | |
1789 | Frun_hook_with_args (make_number (2), args); | |
1790 | ||
1791 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1792 | something. This avoids an endless loop if they failed to | |
1793 | fontify the text for which reason ever. */ | |
1794 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1795 | handled = HANDLED_RECOMPUTE_PROPS; | |
2bf6fa4b | 1796 | UNGCPRO; |
5f5c8ee5 GM |
1797 | } |
1798 | ||
1799 | return handled; | |
1800 | } | |
1801 | ||
1802 | ||
1803 | \f | |
1804 | /*********************************************************************** | |
1805 | Faces | |
1806 | ***********************************************************************/ | |
1807 | ||
1808 | /* Set up iterator IT from face properties at its current position. | |
1809 | Called from handle_stop. */ | |
1810 | ||
1811 | static enum prop_handled | |
1812 | handle_face_prop (it) | |
1813 | struct it *it; | |
1814 | { | |
1815 | int new_face_id, next_stop; | |
1816 | ||
1817 | if (!STRINGP (it->string)) | |
1818 | { | |
1819 | new_face_id | |
1820 | = face_at_buffer_position (it->w, | |
1821 | IT_CHARPOS (*it), | |
1822 | it->region_beg_charpos, | |
1823 | it->region_end_charpos, | |
1824 | &next_stop, | |
1825 | (IT_CHARPOS (*it) | |
1826 | + TEXT_PROP_DISTANCE_LIMIT), | |
1827 | 0); | |
1828 | ||
1829 | /* Is this a start of a run of characters with box face? | |
1830 | Caveat: this can be called for a freshly initialized | |
1831 | iterator; face_id is -1 is this case. We know that the new | |
1832 | face will not change until limit, i.e. if the new face has a | |
1833 | box, all characters up to limit will have one. But, as | |
1834 | usual, we don't know whether limit is really the end. */ | |
1835 | if (new_face_id != it->face_id) | |
1836 | { | |
1837 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1838 | ||
1839 | /* If new face has a box but old face has not, this is | |
1840 | the start of a run of characters with box, i.e. it has | |
1841 | a shadow on the left side. The value of face_id of the | |
1842 | iterator will be -1 if this is the initial call that gets | |
1843 | the face. In this case, we have to look in front of IT's | |
1844 | position and see whether there is a face != new_face_id. */ | |
1845 | it->start_of_box_run_p | |
1846 | = (new_face->box != FACE_NO_BOX | |
1847 | && (it->face_id >= 0 | |
1848 | || IT_CHARPOS (*it) == BEG | |
1849 | || new_face_id != face_before_it_pos (it))); | |
1850 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1851 | } | |
1852 | } | |
1853 | else | |
1854 | { | |
1855 | new_face_id | |
1856 | = face_at_string_position (it->w, | |
1857 | it->string, | |
1858 | IT_STRING_CHARPOS (*it), | |
1859 | (it->current.overlay_string_index >= 0 | |
1860 | ? IT_CHARPOS (*it) | |
1861 | : 0), | |
1862 | it->region_beg_charpos, | |
1863 | it->region_end_charpos, | |
1864 | &next_stop, | |
1865 | it->base_face_id); | |
1866 | ||
1867 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
1868 | /* If IT is used to display a mode line we would really like to | |
1869 | use the mode line face instead of the frame's default face. */ | |
1870 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
1871 | && new_face_id == DEFAULT_FACE_ID) | |
1872 | new_face_id = MODE_LINE_FACE_ID; | |
1873 | #endif | |
1874 | ||
1875 | /* Is this a start of a run of characters with box? Caveat: | |
1876 | this can be called for a freshly allocated iterator; face_id | |
1877 | is -1 is this case. We know that the new face will not | |
1878 | change until the next check pos, i.e. if the new face has a | |
1879 | box, all characters up to that position will have a | |
1880 | box. But, as usual, we don't know whether that position | |
1881 | is really the end. */ | |
1882 | if (new_face_id != it->face_id) | |
1883 | { | |
1884 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1885 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
1886 | ||
1887 | /* If new face has a box but old face hasn't, this is the | |
1888 | start of a run of characters with box, i.e. it has a | |
1889 | shadow on the left side. */ | |
1890 | it->start_of_box_run_p | |
1891 | = new_face->box && (old_face == NULL || !old_face->box); | |
1892 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | it->face_id = new_face_id; | |
5f5c8ee5 GM |
1897 | return HANDLED_NORMALLY; |
1898 | } | |
1899 | ||
1900 | ||
1901 | /* Compute the face one character before or after the current position | |
1902 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
1903 | position. Value is the id of the face. */ | |
1904 | ||
1905 | static int | |
1906 | face_before_or_after_it_pos (it, before_p) | |
1907 | struct it *it; | |
1908 | int before_p; | |
1909 | { | |
1910 | int face_id, limit; | |
1911 | int next_check_charpos; | |
1912 | struct text_pos pos; | |
1913 | ||
1914 | xassert (it->s == NULL); | |
1915 | ||
1916 | if (STRINGP (it->string)) | |
1917 | { | |
1918 | /* No face change past the end of the string (for the case | |
1919 | we are padding with spaces). No face change before the | |
1920 | string start. */ | |
1921 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
1922 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
1923 | return it->face_id; | |
1924 | ||
1925 | /* Set pos to the position before or after IT's current position. */ | |
1926 | if (before_p) | |
1927 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
1928 | else | |
260a86a0 KH |
1929 | /* For composition, we must check the character after the |
1930 | composition. */ | |
1931 | pos = (it->what == IT_COMPOSITION | |
1932 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
1933 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 GM |
1934 | |
1935 | /* Get the face for ASCII, or unibyte. */ | |
1936 | face_id | |
1937 | = face_at_string_position (it->w, | |
1938 | it->string, | |
1939 | CHARPOS (pos), | |
1940 | (it->current.overlay_string_index >= 0 | |
1941 | ? IT_CHARPOS (*it) | |
1942 | : 0), | |
1943 | it->region_beg_charpos, | |
1944 | it->region_end_charpos, | |
1945 | &next_check_charpos, | |
1946 | it->base_face_id); | |
1947 | ||
1948 | /* Correct the face for charsets different from ASCII. Do it | |
1949 | for the multibyte case only. The face returned above is | |
1950 | suitable for unibyte text if IT->string is unibyte. */ | |
1951 | if (STRING_MULTIBYTE (it->string)) | |
1952 | { | |
1953 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
1954 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
980806b6 KH |
1955 | int c, len; |
1956 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
5f5c8ee5 | 1957 | |
4fdb80f2 | 1958 | c = string_char_and_length (p, rest, &len); |
980806b6 | 1959 | face_id = FACE_FOR_CHAR (it->f, face, c); |
5f5c8ee5 GM |
1960 | } |
1961 | } | |
1962 | else | |
1963 | { | |
70851746 GM |
1964 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
1965 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
1966 | return it->face_id; | |
1967 | ||
5f5c8ee5 GM |
1968 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
1969 | pos = it->current.pos; | |
1970 | ||
1971 | if (before_p) | |
c1005d06 | 1972 | DEC_TEXT_POS (pos, it->multibyte_p); |
5f5c8ee5 | 1973 | else |
260a86a0 KH |
1974 | { |
1975 | if (it->what == IT_COMPOSITION) | |
1976 | /* For composition, we must check the position after the | |
1977 | composition. */ | |
1978 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
1979 | else | |
c1005d06 | 1980 | INC_TEXT_POS (pos, it->multibyte_p); |
260a86a0 | 1981 | } |
5f5c8ee5 GM |
1982 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
1983 | face_id = face_at_buffer_position (it->w, | |
1984 | CHARPOS (pos), | |
1985 | it->region_beg_charpos, | |
1986 | it->region_end_charpos, | |
1987 | &next_check_charpos, | |
1988 | limit, 0); | |
1989 | ||
1990 | /* Correct the face for charsets different from ASCII. Do it | |
1991 | for the multibyte case only. The face returned above is | |
1992 | suitable for unibyte text if current_buffer is unibyte. */ | |
1993 | if (it->multibyte_p) | |
1994 | { | |
980806b6 KH |
1995 | int c = FETCH_MULTIBYTE_CHAR (CHARPOS (pos)); |
1996 | struct face *face = FACE_FROM_ID (it->f, face_id); | |
1997 | face_id = FACE_FOR_CHAR (it->f, face, c); | |
5f5c8ee5 GM |
1998 | } |
1999 | } | |
2000 | ||
2001 | return face_id; | |
2002 | } | |
2003 | ||
2004 | ||
2005 | \f | |
2006 | /*********************************************************************** | |
2007 | Invisible text | |
2008 | ***********************************************************************/ | |
2009 | ||
2010 | /* Set up iterator IT from invisible properties at its current | |
2011 | position. Called from handle_stop. */ | |
2012 | ||
2013 | static enum prop_handled | |
2014 | handle_invisible_prop (it) | |
2015 | struct it *it; | |
2016 | { | |
2017 | enum prop_handled handled = HANDLED_NORMALLY; | |
2018 | ||
2019 | if (STRINGP (it->string)) | |
2020 | { | |
2021 | extern Lisp_Object Qinvisible; | |
2022 | Lisp_Object prop, end_charpos, limit, charpos; | |
2023 | ||
2024 | /* Get the value of the invisible text property at the | |
2025 | current position. Value will be nil if there is no such | |
2026 | property. */ | |
2027 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2028 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2029 | ||
2030 | if (!NILP (prop)) | |
2031 | { | |
2032 | handled = HANDLED_RECOMPUTE_PROPS; | |
2033 | ||
2034 | /* Get the position at which the next change of the | |
2035 | invisible text property can be found in IT->string. | |
2036 | Value will be nil if the property value is the same for | |
2037 | all the rest of IT->string. */ | |
2038 | XSETINT (limit, XSTRING (it->string)->size); | |
2039 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2040 | it->string, limit); | |
2041 | ||
2042 | /* Text at current position is invisible. The next | |
2043 | change in the property is at position end_charpos. | |
2044 | Move IT's current position to that position. */ | |
2045 | if (INTEGERP (end_charpos) | |
2046 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2047 | { | |
2048 | struct text_pos old; | |
2049 | old = it->current.string_pos; | |
2050 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2051 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2052 | } | |
2053 | else | |
2054 | { | |
2055 | /* The rest of the string is invisible. If this is an | |
2056 | overlay string, proceed with the next overlay string | |
2057 | or whatever comes and return a character from there. */ | |
2058 | if (it->current.overlay_string_index >= 0) | |
2059 | { | |
2060 | next_overlay_string (it); | |
2061 | /* Don't check for overlay strings when we just | |
2062 | finished processing them. */ | |
2063 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2064 | } | |
2065 | else | |
2066 | { | |
2067 | struct Lisp_String *s = XSTRING (it->string); | |
2068 | IT_STRING_CHARPOS (*it) = s->size; | |
2069 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2070 | } | |
2071 | } | |
2072 | } | |
2073 | } | |
2074 | else | |
2075 | { | |
2076 | int visible_p, newpos, next_stop; | |
2077 | Lisp_Object pos, prop; | |
2078 | ||
2079 | /* First of all, is there invisible text at this position? */ | |
2080 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2081 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2082 | ||
2083 | /* If we are on invisible text, skip over it. */ | |
2084 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2085 | { | |
2086 | /* Record whether we have to display an ellipsis for the | |
2087 | invisible text. */ | |
2088 | int display_ellipsis_p | |
2089 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2090 | ||
2091 | handled = HANDLED_RECOMPUTE_PROPS; | |
2092 | ||
2093 | /* Loop skipping over invisible text. The loop is left at | |
2094 | ZV or with IT on the first char being visible again. */ | |
2095 | do | |
2096 | { | |
2097 | /* Try to skip some invisible text. Return value is the | |
2098 | position reached which can be equal to IT's position | |
2099 | if there is nothing invisible here. This skips both | |
2100 | over invisible text properties and overlays with | |
2101 | invisible property. */ | |
2102 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2103 | &next_stop, ZV, it->window); | |
2104 | ||
2105 | /* If we skipped nothing at all we weren't at invisible | |
2106 | text in the first place. If everything to the end of | |
2107 | the buffer was skipped, end the loop. */ | |
2108 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2109 | visible_p = 1; | |
2110 | else | |
2111 | { | |
2112 | /* We skipped some characters but not necessarily | |
2113 | all there are. Check if we ended up on visible | |
2114 | text. Fget_char_property returns the property of | |
2115 | the char before the given position, i.e. if we | |
2116 | get visible_p = 1, this means that the char at | |
2117 | newpos is visible. */ | |
2118 | XSETFASTINT (pos, newpos); | |
2119 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2120 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2121 | } | |
2122 | ||
2123 | /* If we ended up on invisible text, proceed to | |
2124 | skip starting with next_stop. */ | |
2125 | if (!visible_p) | |
2126 | IT_CHARPOS (*it) = next_stop; | |
2127 | } | |
2128 | while (!visible_p); | |
2129 | ||
2130 | /* The position newpos is now either ZV or on visible text. */ | |
2131 | IT_CHARPOS (*it) = newpos; | |
2132 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2133 | ||
2134 | /* Maybe return `...' next for the end of the invisible text. */ | |
2135 | if (display_ellipsis_p) | |
2136 | { | |
2137 | if (it->dp | |
2138 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2139 | { | |
2140 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2141 | it->dpvec = v->contents; | |
2142 | it->dpend = v->contents + v->size; | |
2143 | } | |
2144 | else | |
2145 | { | |
2146 | /* Default `...'. */ | |
2147 | it->dpvec = default_invis_vector; | |
2148 | it->dpend = default_invis_vector + 3; | |
2149 | } | |
2150 | ||
2151 | /* The ellipsis display does not replace the display of | |
2152 | the character at the new position. Indicate this by | |
2153 | setting IT->dpvec_char_len to zero. */ | |
2154 | it->dpvec_char_len = 0; | |
2155 | ||
2156 | it->current.dpvec_index = 0; | |
2157 | it->method = next_element_from_display_vector; | |
2158 | } | |
2159 | } | |
2160 | } | |
2161 | ||
2162 | return handled; | |
2163 | } | |
2164 | ||
2165 | ||
2166 | \f | |
2167 | /*********************************************************************** | |
2168 | 'display' property | |
2169 | ***********************************************************************/ | |
2170 | ||
2171 | /* Set up iterator IT from `display' property at its current position. | |
2172 | Called from handle_stop. */ | |
2173 | ||
2174 | static enum prop_handled | |
2175 | handle_display_prop (it) | |
2176 | struct it *it; | |
2177 | { | |
2178 | Lisp_Object prop, object; | |
2179 | struct text_pos *position; | |
2180 | int space_or_image_found_p; | |
2181 | ||
2182 | if (STRINGP (it->string)) | |
2183 | { | |
2184 | object = it->string; | |
2185 | position = &it->current.string_pos; | |
2186 | } | |
2187 | else | |
2188 | { | |
2189 | object = Qnil; | |
2190 | position = &it->current.pos; | |
2191 | } | |
2192 | ||
2193 | /* Reset those iterator values set from display property values. */ | |
2194 | it->font_height = Qnil; | |
2195 | it->space_width = Qnil; | |
2196 | it->voffset = 0; | |
2197 | ||
2198 | /* We don't support recursive `display' properties, i.e. string | |
2199 | values that have a string `display' property, that have a string | |
2200 | `display' property etc. */ | |
2201 | if (!it->string_from_display_prop_p) | |
2202 | it->area = TEXT_AREA; | |
2203 | ||
2204 | prop = Fget_char_property (make_number (position->charpos), | |
2205 | Qdisplay, object); | |
2206 | if (NILP (prop)) | |
2207 | return HANDLED_NORMALLY; | |
2208 | ||
2209 | space_or_image_found_p = 0; | |
f3751a65 GM |
2210 | if (CONSP (prop) |
2211 | && CONSP (XCAR (prop)) | |
2212 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
5f5c8ee5 | 2213 | { |
f3751a65 | 2214 | /* A list of sub-properties. */ |
5f5c8ee5 GM |
2215 | while (CONSP (prop)) |
2216 | { | |
2217 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2218 | space_or_image_found_p = 1; | |
2219 | prop = XCDR (prop); | |
2220 | } | |
2221 | } | |
2222 | else if (VECTORP (prop)) | |
2223 | { | |
2224 | int i; | |
2225 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2226 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2227 | object, position)) | |
2228 | space_or_image_found_p = 1; | |
2229 | } | |
2230 | else | |
2231 | { | |
2232 | if (handle_single_display_prop (it, prop, object, position)) | |
2233 | space_or_image_found_p = 1; | |
2234 | } | |
2235 | ||
2236 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2237 | } | |
2238 | ||
2239 | ||
6c577098 | 2240 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2241 | at START_POS in OBJECT. */ |
2242 | ||
2243 | static struct text_pos | |
2244 | display_prop_end (it, object, start_pos) | |
2245 | struct it *it; | |
2246 | Lisp_Object object; | |
2247 | struct text_pos start_pos; | |
2248 | { | |
2249 | Lisp_Object end; | |
2250 | struct text_pos end_pos; | |
5f5c8ee5 | 2251 | |
6c577098 GM |
2252 | end = next_single_char_property_change (make_number (CHARPOS (start_pos)), |
2253 | Qdisplay, object, Qnil); | |
2254 | CHARPOS (end_pos) = XFASTINT (end); | |
2255 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2256 | compute_string_pos (&end_pos, start_pos, it->string); |
2257 | else | |
6c577098 | 2258 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2259 | |
2260 | return end_pos; | |
2261 | } | |
2262 | ||
2263 | ||
2264 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2265 | is the object in which the `display' property was found. *POSITION | |
2266 | is the position at which it was found. | |
2267 | ||
2268 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2269 | end position of the `display' property. | |
2270 | ||
2271 | Value is non-zero if a `space' or `image' property value was found. */ | |
2272 | ||
2273 | static int | |
2274 | handle_single_display_prop (it, prop, object, position) | |
2275 | struct it *it; | |
2276 | Lisp_Object prop; | |
2277 | Lisp_Object object; | |
2278 | struct text_pos *position; | |
2279 | { | |
2280 | Lisp_Object value; | |
2281 | int space_or_image_found_p = 0; | |
2282 | ||
2283 | Lisp_Object form; | |
2284 | ||
d3acf96b | 2285 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
5a4c88c4 | 2286 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2287 | form = Qt; |
d3acf96b | 2288 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2289 | { |
2290 | prop = XCDR (prop); | |
2291 | if (!CONSP (prop)) | |
2292 | return 0; | |
2293 | form = XCAR (prop); | |
2294 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2295 | } |
2296 | ||
2297 | if (!NILP (form) && !EQ (form, Qt)) | |
2298 | { | |
2299 | struct gcpro gcpro1; | |
2300 | struct text_pos end_pos, pt; | |
2301 | ||
2302 | end_pos = display_prop_end (it, object, *position); | |
2303 | GCPRO1 (form); | |
2304 | ||
2305 | /* Temporarily set point to the end position, and then evaluate | |
2306 | the form. This makes `(eolp)' work as FORM. */ | |
2307 | CHARPOS (pt) = PT; | |
2308 | BYTEPOS (pt) = PT_BYTE; | |
2309 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2310 | form = eval_form (form); | |
2311 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
2312 | UNGCPRO; | |
2313 | } | |
2314 | ||
2315 | if (NILP (form)) | |
2316 | return 0; | |
2317 | ||
2318 | if (CONSP (prop) | |
2319 | && EQ (XCAR (prop), Qheight) | |
2320 | && CONSP (XCDR (prop))) | |
2321 | { | |
2322 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2323 | return 0; | |
2324 | ||
2325 | /* `(height HEIGHT)'. */ | |
2326 | it->font_height = XCAR (XCDR (prop)); | |
2327 | if (!NILP (it->font_height)) | |
2328 | { | |
2329 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2330 | int new_height = -1; | |
2331 | ||
2332 | if (CONSP (it->font_height) | |
2333 | && (EQ (XCAR (it->font_height), Qplus) | |
2334 | || EQ (XCAR (it->font_height), Qminus)) | |
2335 | && CONSP (XCDR (it->font_height)) | |
2336 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2337 | { | |
2338 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2339 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2340 | if (EQ (XCAR (it->font_height), Qplus)) | |
2341 | steps = - steps; | |
2342 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2343 | } | |
2344 | else if (SYMBOLP (it->font_height)) | |
2345 | { | |
2346 | /* Call function with current height as argument. | |
2347 | Value is the new height. */ | |
2348 | Lisp_Object form, height; | |
2349 | struct gcpro gcpro1; | |
2350 | ||
2351 | height = face->lface[LFACE_HEIGHT_INDEX]; | |
2352 | form = Fcons (it->font_height, Fcons (height, Qnil)); | |
2353 | GCPRO1 (form); | |
2354 | height = eval_form (form); | |
2355 | if (NUMBERP (height)) | |
2356 | new_height = XFLOATINT (height); | |
2357 | UNGCPRO; | |
2358 | } | |
2359 | else if (NUMBERP (it->font_height)) | |
2360 | { | |
2361 | /* Value is a multiple of the canonical char height. */ | |
2362 | struct face *face; | |
2363 | ||
2364 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2365 | new_height = (XFLOATINT (it->font_height) | |
2366 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2367 | } | |
2368 | else | |
2369 | { | |
2370 | /* Evaluate IT->font_height with `height' bound to the | |
2371 | current specified height to get the new height. */ | |
2372 | Lisp_Object value; | |
2373 | int count = specpdl_ptr - specpdl; | |
2374 | ||
2375 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2376 | value = eval_form (it->font_height); | |
2377 | unbind_to (count, Qnil); | |
2378 | ||
2379 | if (NUMBERP (value)) | |
2380 | new_height = XFLOATINT (value); | |
2381 | } | |
2382 | ||
2383 | if (new_height > 0) | |
2384 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2385 | } | |
2386 | } | |
2387 | else if (CONSP (prop) | |
2388 | && EQ (XCAR (prop), Qspace_width) | |
2389 | && CONSP (XCDR (prop))) | |
2390 | { | |
2391 | /* `(space_width WIDTH)'. */ | |
2392 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2393 | return 0; | |
2394 | ||
2395 | value = XCAR (XCDR (prop)); | |
2396 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2397 | it->space_width = value; | |
2398 | } | |
2399 | else if (CONSP (prop) | |
2400 | && EQ (XCAR (prop), Qraise) | |
2401 | && CONSP (XCDR (prop))) | |
2402 | { | |
5f5c8ee5 GM |
2403 | /* `(raise FACTOR)'. */ |
2404 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2405 | return 0; | |
2406 | ||
fb3842a8 | 2407 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
2408 | value = XCAR (XCDR (prop)); |
2409 | if (NUMBERP (value)) | |
2410 | { | |
2411 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2412 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 2413 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
2414 | } |
2415 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2416 | } | |
2417 | else if (!it->string_from_display_prop_p) | |
2418 | { | |
f3751a65 GM |
2419 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
2420 | VALUE) or `((margin nil) VALUE)' or VALUE. */ | |
5f5c8ee5 GM |
2421 | Lisp_Object location, value; |
2422 | struct text_pos start_pos; | |
2423 | int valid_p; | |
2424 | ||
2425 | /* Characters having this form of property are not displayed, so | |
2426 | we have to find the end of the property. */ | |
2427 | space_or_image_found_p = 1; | |
2428 | start_pos = *position; | |
2429 | *position = display_prop_end (it, object, start_pos); | |
15e26c76 | 2430 | value = Qnil; |
5f5c8ee5 GM |
2431 | |
2432 | /* Let's stop at the new position and assume that all | |
2433 | text properties change there. */ | |
2434 | it->stop_charpos = position->charpos; | |
2435 | ||
f3751a65 GM |
2436 | location = Qunbound; |
2437 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 2438 | { |
f3751a65 GM |
2439 | Lisp_Object tem; |
2440 | ||
5f5c8ee5 | 2441 | value = XCDR (prop); |
f3751a65 GM |
2442 | if (CONSP (value)) |
2443 | value = XCAR (value); | |
2444 | ||
2445 | tem = XCAR (prop); | |
2446 | if (EQ (XCAR (tem), Qmargin) | |
2447 | && (tem = XCDR (tem), | |
2448 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
2449 | (NILP (tem) | |
2450 | || EQ (tem, Qleft_margin) | |
2451 | || EQ (tem, Qright_margin)))) | |
2452 | location = tem; | |
5f5c8ee5 | 2453 | } |
f3751a65 GM |
2454 | |
2455 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
2456 | { |
2457 | location = Qnil; | |
2458 | value = prop; | |
2459 | } | |
2460 | ||
2461 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 2462 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
2463 | valid_p = STRINGP (value); |
2464 | else | |
2465 | valid_p = (STRINGP (value) | |
2466 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2467 | || valid_image_p (value)); | |
2468 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2469 | valid_p = STRINGP (value); | |
2470 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2471 | ||
2472 | if ((EQ (location, Qleft_margin) | |
2473 | || EQ (location, Qright_margin) | |
2474 | || NILP (location)) | |
2475 | && valid_p) | |
2476 | { | |
2477 | /* Save current settings of IT so that we can restore them | |
2478 | when we are finished with the glyph property value. */ | |
2479 | push_it (it); | |
2480 | ||
2481 | if (NILP (location)) | |
2482 | it->area = TEXT_AREA; | |
2483 | else if (EQ (location, Qleft_margin)) | |
2484 | it->area = LEFT_MARGIN_AREA; | |
2485 | else | |
2486 | it->area = RIGHT_MARGIN_AREA; | |
2487 | ||
2488 | if (STRINGP (value)) | |
2489 | { | |
2490 | it->string = value; | |
2491 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2492 | it->current.overlay_string_index = -1; | |
2493 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2494 | it->end_charpos = it->string_nchars | |
2495 | = XSTRING (it->string)->size; | |
2496 | it->method = next_element_from_string; | |
2497 | it->stop_charpos = 0; | |
2498 | it->string_from_display_prop_p = 1; | |
2499 | } | |
2500 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2501 | { | |
2502 | it->method = next_element_from_stretch; | |
2503 | it->object = value; | |
2504 | it->current.pos = it->position = start_pos; | |
2505 | } | |
2506 | #ifdef HAVE_WINDOW_SYSTEM | |
2507 | else | |
2508 | { | |
2509 | it->what = IT_IMAGE; | |
2510 | it->image_id = lookup_image (it->f, value); | |
2511 | it->position = start_pos; | |
2512 | it->object = NILP (object) ? it->w->buffer : object; | |
2513 | it->method = next_element_from_image; | |
2514 | ||
2515 | /* Say that we don't have consumed the characters with | |
2516 | `display' property yet. The call to pop_it in | |
2517 | set_iterator_to_next will clean this up. */ | |
2518 | *position = start_pos; | |
2519 | } | |
2520 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2521 | } | |
2522 | } | |
2523 | ||
2524 | return space_or_image_found_p; | |
2525 | } | |
2526 | ||
2527 | ||
2528 | \f | |
260a86a0 KH |
2529 | /*********************************************************************** |
2530 | `composition' property | |
2531 | ***********************************************************************/ | |
2532 | ||
2533 | /* Set up iterator IT from `composition' property at its current | |
2534 | position. Called from handle_stop. */ | |
2535 | ||
2536 | static enum prop_handled | |
2537 | handle_composition_prop (it) | |
2538 | struct it *it; | |
2539 | { | |
2540 | Lisp_Object prop, string; | |
2541 | int pos, pos_byte, end; | |
2542 | enum prop_handled handled = HANDLED_NORMALLY; | |
2543 | ||
2544 | if (STRINGP (it->string)) | |
2545 | { | |
2546 | pos = IT_STRING_CHARPOS (*it); | |
2547 | pos_byte = IT_STRING_BYTEPOS (*it); | |
2548 | string = it->string; | |
2549 | } | |
2550 | else | |
2551 | { | |
2552 | pos = IT_CHARPOS (*it); | |
2553 | pos_byte = IT_BYTEPOS (*it); | |
2554 | string = Qnil; | |
2555 | } | |
2556 | ||
2557 | /* If there's a valid composition and point is not inside of the | |
2558 | composition (in the case that the composition is from the current | |
2559 | buffer), draw a glyph composed from the composition components. */ | |
2560 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
2561 | && COMPOSITION_VALID_P (pos, end, prop) | |
2562 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
2563 | { | |
2564 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
2565 | ||
2566 | if (id >= 0) | |
2567 | { | |
2568 | it->method = next_element_from_composition; | |
2569 | it->cmp_id = id; | |
2570 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
2571 | /* For a terminal, draw only the first character of the | |
2572 | components. */ | |
2573 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
2574 | it->len = (STRINGP (it->string) | |
2575 | ? string_char_to_byte (it->string, end) | |
2576 | : CHAR_TO_BYTE (end)) - pos_byte; | |
2577 | it->stop_charpos = end; | |
2578 | handled = HANDLED_RETURN; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | return handled; | |
2583 | } | |
2584 | ||
2585 | ||
2586 | \f | |
5f5c8ee5 GM |
2587 | /*********************************************************************** |
2588 | Overlay strings | |
2589 | ***********************************************************************/ | |
2590 | ||
2591 | /* The following structure is used to record overlay strings for | |
2592 | later sorting in load_overlay_strings. */ | |
2593 | ||
2594 | struct overlay_entry | |
2595 | { | |
2596 | Lisp_Object string; | |
2597 | int priority; | |
2598 | int after_string_p; | |
2599 | }; | |
2600 | ||
2601 | ||
2602 | /* Set up iterator IT from overlay strings at its current position. | |
2603 | Called from handle_stop. */ | |
2604 | ||
2605 | static enum prop_handled | |
2606 | handle_overlay_change (it) | |
2607 | struct it *it; | |
2608 | { | |
2609 | /* Overlays are handled in current_buffer only. */ | |
2610 | if (STRINGP (it->string)) | |
2611 | return HANDLED_NORMALLY; | |
2612 | else | |
2613 | return (get_overlay_strings (it) | |
2614 | ? HANDLED_RECOMPUTE_PROPS | |
2615 | : HANDLED_NORMALLY); | |
2616 | } | |
2617 | ||
2618 | ||
2619 | /* Set up the next overlay string for delivery by IT, if there is an | |
2620 | overlay string to deliver. Called by set_iterator_to_next when the | |
2621 | end of the current overlay string is reached. If there are more | |
2622 | overlay strings to display, IT->string and | |
2623 | IT->current.overlay_string_index are set appropriately here. | |
2624 | Otherwise IT->string is set to nil. */ | |
2625 | ||
2626 | static void | |
2627 | next_overlay_string (it) | |
2628 | struct it *it; | |
2629 | { | |
2630 | ++it->current.overlay_string_index; | |
2631 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2632 | { | |
2633 | /* No more overlay strings. Restore IT's settings to what | |
2634 | they were before overlay strings were processed, and | |
2635 | continue to deliver from current_buffer. */ | |
2636 | pop_it (it); | |
2637 | xassert (it->stop_charpos >= BEGV | |
2638 | && it->stop_charpos <= it->end_charpos); | |
2639 | it->string = Qnil; | |
2640 | it->current.overlay_string_index = -1; | |
2641 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2642 | it->n_overlay_strings = 0; | |
2643 | it->method = next_element_from_buffer; | |
2644 | } | |
2645 | else | |
2646 | { | |
2647 | /* There are more overlay strings to process. If | |
2648 | IT->current.overlay_string_index has advanced to a position | |
2649 | where we must load IT->overlay_strings with more strings, do | |
2650 | it. */ | |
2651 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2652 | ||
2653 | if (it->current.overlay_string_index && i == 0) | |
2654 | load_overlay_strings (it); | |
2655 | ||
2656 | /* Initialize IT to deliver display elements from the overlay | |
2657 | string. */ | |
2658 | it->string = it->overlay_strings[i]; | |
2659 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2660 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2661 | it->method = next_element_from_string; | |
2662 | it->stop_charpos = 0; | |
2663 | } | |
2664 | ||
2665 | CHECK_IT (it); | |
2666 | } | |
2667 | ||
2668 | ||
2669 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2670 | comparison function for qsort in load_overlay_strings. Overlay | |
2671 | strings for the same position are sorted so that | |
2672 | ||
2673 | 1. All after-strings come in front of before-strings. | |
2674 | ||
2675 | 2. Within after-strings, strings are sorted so that overlay strings | |
2676 | from overlays with higher priorities come first. | |
2677 | ||
2678 | 2. Within before-strings, strings are sorted so that overlay | |
2679 | strings from overlays with higher priorities come last. | |
2680 | ||
2681 | Value is analogous to strcmp. */ | |
2682 | ||
2683 | ||
2684 | static int | |
2685 | compare_overlay_entries (e1, e2) | |
2686 | void *e1, *e2; | |
2687 | { | |
2688 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2689 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2690 | int result; | |
2691 | ||
2692 | if (entry1->after_string_p != entry2->after_string_p) | |
2693 | /* Let after-strings appear in front of before-strings. */ | |
2694 | result = entry1->after_string_p ? -1 : 1; | |
2695 | else if (entry1->after_string_p) | |
2696 | /* After-strings sorted in order of decreasing priority. */ | |
2697 | result = entry2->priority - entry1->priority; | |
2698 | else | |
2699 | /* Before-strings sorted in order of increasing priority. */ | |
2700 | result = entry1->priority - entry2->priority; | |
2701 | ||
2702 | return result; | |
2703 | } | |
2704 | ||
2705 | ||
2706 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2707 | current buffer position. Set IT->n_overlays to the total number of | |
2708 | overlay strings found. | |
2709 | ||
2710 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2711 | a time. On entry into load_overlay_strings, | |
2712 | IT->current.overlay_string_index gives the number of overlay | |
2713 | strings that have already been loaded by previous calls to this | |
2714 | function. | |
2715 | ||
2716 | Overlay strings are sorted so that after-string strings come in | |
2717 | front of before-string strings. Within before and after-strings, | |
2718 | strings are sorted by overlay priority. See also function | |
2719 | compare_overlay_entries. */ | |
2720 | ||
2721 | static void | |
2722 | load_overlay_strings (it) | |
2723 | struct it *it; | |
2724 | { | |
2725 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2726 | Lisp_Object ov, overlay, window, str; | |
2727 | int start, end; | |
2728 | int size = 20; | |
2729 | int n = 0, i, j; | |
2730 | struct overlay_entry *entries | |
2731 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2732 | ||
2733 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2734 | `entries' which has size `size' and currently contains `n' | |
2735 | elements. AFTER_P non-zero means STRING is an after-string of | |
2736 | OVERLAY. */ | |
2737 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2738 | do \ | |
2739 | { \ | |
2740 | Lisp_Object priority; \ | |
2741 | \ | |
2742 | if (n == size) \ | |
2743 | { \ | |
2744 | int new_size = 2 * size; \ | |
2745 | struct overlay_entry *old = entries; \ | |
2746 | entries = \ | |
2747 | (struct overlay_entry *) alloca (new_size \ | |
2748 | * sizeof *entries); \ | |
2749 | bcopy (old, entries, size * sizeof *entries); \ | |
2750 | size = new_size; \ | |
2751 | } \ | |
2752 | \ | |
2753 | entries[n].string = (STRING); \ | |
2754 | priority = Foverlay_get ((OVERLAY), Qpriority); \ | |
2755 | entries[n].priority \ | |
2756 | = INTEGERP (priority) ? XFASTINT (priority) : 0; \ | |
2757 | entries[n].after_string_p = (AFTER_P); \ | |
2758 | ++n; \ | |
2759 | } \ | |
2760 | while (0) | |
2761 | ||
2762 | /* Process overlay before the overlay center. */ | |
2763 | for (ov = current_buffer->overlays_before; | |
2764 | CONSP (ov); | |
9472f927 | 2765 | ov = XCDR (ov)) |
5f5c8ee5 | 2766 | { |
9472f927 | 2767 | overlay = XCAR (ov); |
5f5c8ee5 GM |
2768 | xassert (OVERLAYP (overlay)); |
2769 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2770 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2771 | ||
2772 | if (end < IT_CHARPOS (*it)) | |
2773 | break; | |
2774 | ||
2775 | /* Skip this overlay if it doesn't start or end at IT's current | |
2776 | position. */ | |
2777 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2778 | continue; | |
2779 | ||
2780 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2781 | window = Foverlay_get (overlay, Qwindow); | |
2782 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2783 | continue; | |
2784 | ||
2785 | /* If overlay has a non-empty before-string, record it. */ | |
2786 | if (start == IT_CHARPOS (*it) | |
2787 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2788 | && XSTRING (str)->size) | |
2789 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2790 | ||
2791 | /* If overlay has a non-empty after-string, record it. */ | |
2792 | if (end == IT_CHARPOS (*it) | |
2793 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2794 | && XSTRING (str)->size) | |
2795 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2796 | } | |
2797 | ||
2798 | /* Process overlays after the overlay center. */ | |
2799 | for (ov = current_buffer->overlays_after; | |
2800 | CONSP (ov); | |
9472f927 | 2801 | ov = XCDR (ov)) |
5f5c8ee5 | 2802 | { |
9472f927 | 2803 | overlay = XCAR (ov); |
5f5c8ee5 GM |
2804 | xassert (OVERLAYP (overlay)); |
2805 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2806 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2807 | ||
2808 | if (start > IT_CHARPOS (*it)) | |
2809 | break; | |
2810 | ||
2811 | /* Skip this overlay if it doesn't start or end at IT's current | |
2812 | position. */ | |
2813 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2814 | continue; | |
2815 | ||
2816 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2817 | window = Foverlay_get (overlay, Qwindow); | |
2818 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2819 | continue; | |
2820 | ||
2821 | /* If overlay has a non-empty before-string, record it. */ | |
2822 | if (start == IT_CHARPOS (*it) | |
2823 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2824 | && XSTRING (str)->size) | |
2825 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2826 | ||
2827 | /* If overlay has a non-empty after-string, record it. */ | |
2828 | if (end == IT_CHARPOS (*it) | |
2829 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2830 | && XSTRING (str)->size) | |
2831 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2832 | } | |
2833 | ||
2834 | #undef RECORD_OVERLAY_STRING | |
2835 | ||
2836 | /* Sort entries. */ | |
2837 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
2838 | ||
2839 | /* Record the total number of strings to process. */ | |
2840 | it->n_overlay_strings = n; | |
2841 | ||
2842 | /* IT->current.overlay_string_index is the number of overlay strings | |
2843 | that have already been consumed by IT. Copy some of the | |
2844 | remaining overlay strings to IT->overlay_strings. */ | |
2845 | i = 0; | |
2846 | j = it->current.overlay_string_index; | |
2847 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
2848 | it->overlay_strings[i++] = entries[j++].string; | |
2849 | ||
2850 | CHECK_IT (it); | |
2851 | } | |
2852 | ||
2853 | ||
2854 | /* Get the first chunk of overlay strings at IT's current buffer | |
2855 | position. Value is non-zero if at least one overlay string was | |
2856 | found. */ | |
2857 | ||
2858 | static int | |
2859 | get_overlay_strings (it) | |
2860 | struct it *it; | |
2861 | { | |
2862 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
2863 | process. This fills IT->overlay_strings with strings, and sets | |
2864 | IT->n_overlay_strings to the total number of strings to process. | |
2865 | IT->pos.overlay_string_index has to be set temporarily to zero | |
2866 | because load_overlay_strings needs this; it must be set to -1 | |
2867 | when no overlay strings are found because a zero value would | |
2868 | indicate a position in the first overlay string. */ | |
2869 | it->current.overlay_string_index = 0; | |
2870 | load_overlay_strings (it); | |
2871 | ||
2872 | /* If we found overlay strings, set up IT to deliver display | |
2873 | elements from the first one. Otherwise set up IT to deliver | |
2874 | from current_buffer. */ | |
2875 | if (it->n_overlay_strings) | |
2876 | { | |
2877 | /* Make sure we know settings in current_buffer, so that we can | |
2878 | restore meaningful values when we're done with the overlay | |
2879 | strings. */ | |
2880 | compute_stop_pos (it); | |
2881 | xassert (it->face_id >= 0); | |
2882 | ||
2883 | /* Save IT's settings. They are restored after all overlay | |
2884 | strings have been processed. */ | |
2885 | xassert (it->sp == 0); | |
2886 | push_it (it); | |
2887 | ||
2888 | /* Set up IT to deliver display elements from the first overlay | |
2889 | string. */ | |
2890 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2891 | it->stop_charpos = 0; | |
2892 | it->string = it->overlay_strings[0]; | |
2893 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2894 | xassert (STRINGP (it->string)); | |
2895 | it->method = next_element_from_string; | |
2896 | } | |
2897 | else | |
2898 | { | |
2899 | it->string = Qnil; | |
2900 | it->current.overlay_string_index = -1; | |
2901 | it->method = next_element_from_buffer; | |
2902 | } | |
2903 | ||
2904 | CHECK_IT (it); | |
2905 | ||
2906 | /* Value is non-zero if we found at least one overlay string. */ | |
2907 | return STRINGP (it->string); | |
2908 | } | |
2909 | ||
2910 | ||
2911 | \f | |
2912 | /*********************************************************************** | |
2913 | Saving and restoring state | |
2914 | ***********************************************************************/ | |
2915 | ||
2916 | /* Save current settings of IT on IT->stack. Called, for example, | |
2917 | before setting up IT for an overlay string, to be able to restore | |
2918 | IT's settings to what they were after the overlay string has been | |
2919 | processed. */ | |
2920 | ||
2921 | static void | |
2922 | push_it (it) | |
2923 | struct it *it; | |
2924 | { | |
2925 | struct iterator_stack_entry *p; | |
2926 | ||
2927 | xassert (it->sp < 2); | |
2928 | p = it->stack + it->sp; | |
2929 | ||
2930 | p->stop_charpos = it->stop_charpos; | |
2931 | xassert (it->face_id >= 0); | |
2932 | p->face_id = it->face_id; | |
2933 | p->string = it->string; | |
2934 | p->pos = it->current; | |
2935 | p->end_charpos = it->end_charpos; | |
2936 | p->string_nchars = it->string_nchars; | |
2937 | p->area = it->area; | |
2938 | p->multibyte_p = it->multibyte_p; | |
2939 | p->space_width = it->space_width; | |
2940 | p->font_height = it->font_height; | |
2941 | p->voffset = it->voffset; | |
2942 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
2943 | ++it->sp; | |
2944 | } | |
2945 | ||
2946 | ||
2947 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
2948 | more overlay strings must be processed, and we return to delivering | |
2949 | display elements from a buffer, or when the end of a string from a | |
2950 | `display' property is reached and we return to delivering display | |
2951 | elements from an overlay string, or from a buffer. */ | |
2952 | ||
2953 | static void | |
2954 | pop_it (it) | |
2955 | struct it *it; | |
2956 | { | |
2957 | struct iterator_stack_entry *p; | |
2958 | ||
2959 | xassert (it->sp > 0); | |
2960 | --it->sp; | |
2961 | p = it->stack + it->sp; | |
2962 | it->stop_charpos = p->stop_charpos; | |
2963 | it->face_id = p->face_id; | |
2964 | it->string = p->string; | |
2965 | it->current = p->pos; | |
2966 | it->end_charpos = p->end_charpos; | |
2967 | it->string_nchars = p->string_nchars; | |
2968 | it->area = p->area; | |
2969 | it->multibyte_p = p->multibyte_p; | |
2970 | it->space_width = p->space_width; | |
2971 | it->font_height = p->font_height; | |
2972 | it->voffset = p->voffset; | |
2973 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
2974 | } | |
2975 | ||
2976 | ||
2977 | \f | |
2978 | /*********************************************************************** | |
2979 | Moving over lines | |
2980 | ***********************************************************************/ | |
2981 | ||
2982 | /* Set IT's current position to the previous line start. */ | |
2983 | ||
2984 | static void | |
2985 | back_to_previous_line_start (it) | |
2986 | struct it *it; | |
2987 | { | |
2988 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
2989 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2990 | } | |
2991 | ||
2992 | ||
2993 | /* Set IT's current position to the next line start. */ | |
2994 | ||
2995 | static void | |
2996 | forward_to_next_line_start (it) | |
2997 | struct it *it; | |
2998 | { | |
2999 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
3000 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3001 | } | |
3002 | ||
3003 | ||
3004 | /* Set IT's current position to the previous visible line start. Skip | |
3005 | invisible text that is so either due to text properties or due to | |
3006 | selective display. Caution: this does not change IT->current_x and | |
3007 | IT->hpos. */ | |
3008 | ||
3009 | static void | |
3010 | back_to_previous_visible_line_start (it) | |
3011 | struct it *it; | |
3012 | { | |
3013 | int visible_p = 0; | |
3014 | ||
3015 | /* Go back one newline if not on BEGV already. */ | |
3016 | if (IT_CHARPOS (*it) > BEGV) | |
3017 | back_to_previous_line_start (it); | |
3018 | ||
3019 | /* Move over lines that are invisible because of selective display | |
3020 | or text properties. */ | |
3021 | while (IT_CHARPOS (*it) > BEGV | |
3022 | && !visible_p) | |
3023 | { | |
3024 | visible_p = 1; | |
3025 | ||
3026 | /* If selective > 0, then lines indented more than that values | |
3027 | are invisible. */ | |
3028 | if (it->selective > 0 | |
3029 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3030 | it->selective)) | |
3031 | visible_p = 0; | |
5f5c8ee5 GM |
3032 | else |
3033 | { | |
3034 | Lisp_Object prop; | |
3035 | ||
3036 | prop = Fget_char_property (IT_CHARPOS (*it), Qinvisible, it->window); | |
3037 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
3038 | visible_p = 0; | |
3039 | } | |
5f5c8ee5 GM |
3040 | |
3041 | /* Back one more newline if the current one is invisible. */ | |
3042 | if (!visible_p) | |
3043 | back_to_previous_line_start (it); | |
3044 | } | |
3045 | ||
3046 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3047 | xassert (IT_CHARPOS (*it) == BEGV | |
3048 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3049 | CHECK_IT (it); | |
3050 | } | |
3051 | ||
3052 | ||
3053 | /* Reseat iterator IT at the previous visible line start. Skip | |
3054 | invisible text that is so either due to text properties or due to | |
3055 | selective display. At the end, update IT's overlay information, | |
3056 | face information etc. */ | |
3057 | ||
3058 | static void | |
3059 | reseat_at_previous_visible_line_start (it) | |
3060 | struct it *it; | |
3061 | { | |
3062 | back_to_previous_visible_line_start (it); | |
3063 | reseat (it, it->current.pos, 1); | |
3064 | CHECK_IT (it); | |
3065 | } | |
3066 | ||
3067 | ||
3068 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3069 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3070 | preceding the line start. Skip over invisible text that is so | |
3071 | because of selective display. Compute faces, overlays etc at the | |
3072 | new position. Note that this function does not skip over text that | |
3073 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3074 | |
3075 | static void | |
312246d1 | 3076 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3077 | struct it *it; |
312246d1 | 3078 | int on_newline_p; |
5f5c8ee5 GM |
3079 | { |
3080 | /* Restore the buffer position when currently not delivering display | |
3081 | elements from the current buffer. This is the case, for example, | |
3082 | when called at the end of a truncated overlay string. */ | |
3083 | while (it->sp) | |
3084 | pop_it (it); | |
3085 | it->method = next_element_from_buffer; | |
3086 | ||
3087 | /* Otherwise, scan_buffer would not work. */ | |
3088 | if (IT_CHARPOS (*it) < ZV) | |
3089 | { | |
3090 | /* If on a newline, advance past it. Otherwise, find the next | |
3091 | newline which automatically gives us the position following | |
3092 | the newline. */ | |
3093 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3094 | { | |
3095 | ++IT_CHARPOS (*it); | |
3096 | ++IT_BYTEPOS (*it); | |
3097 | } | |
3098 | else | |
3099 | forward_to_next_line_start (it); | |
3100 | ||
3101 | /* We must either have reached the end of the buffer or end up | |
3102 | after a newline. */ | |
3103 | xassert (IT_CHARPOS (*it) == ZV | |
3104 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3105 | ||
3106 | /* Skip over lines that are invisible because they are indented | |
3107 | more than the value of IT->selective. */ | |
3108 | if (it->selective > 0) | |
3109 | while (IT_CHARPOS (*it) < ZV | |
3110 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3111 | it->selective)) | |
3112 | forward_to_next_line_start (it); | |
312246d1 GM |
3113 | |
3114 | /* Position on the newline if we should. */ | |
13f19968 GM |
3115 | if (on_newline_p |
3116 | && IT_CHARPOS (*it) > BEGV | |
3117 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n') | |
312246d1 GM |
3118 | { |
3119 | --IT_CHARPOS (*it); | |
3120 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3121 | } | |
5f5c8ee5 GM |
3122 | |
3123 | /* Set the iterator there. The 0 as the last parameter of | |
3124 | reseat means don't force a text property lookup. The lookup | |
3125 | is then only done if we've skipped past the iterator's | |
3126 | check_charpos'es. This optimization is important because | |
3127 | text property lookups tend to be expensive. */ | |
3128 | reseat (it, it->current.pos, 0); | |
3129 | } | |
3130 | ||
3131 | CHECK_IT (it); | |
3132 | } | |
3133 | ||
3134 | ||
3135 | \f | |
3136 | /*********************************************************************** | |
3137 | Changing an iterator's position | |
3138 | ***********************************************************************/ | |
3139 | ||
3140 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3141 | is non-zero, always check for text properties at the new position. | |
3142 | Otherwise, text properties are only looked up if POS >= | |
3143 | IT->check_charpos of a property. */ | |
3144 | ||
3145 | static void | |
3146 | reseat (it, pos, force_p) | |
3147 | struct it *it; | |
3148 | struct text_pos pos; | |
3149 | int force_p; | |
3150 | { | |
3151 | int original_pos = IT_CHARPOS (*it); | |
3152 | ||
3153 | reseat_1 (it, pos, 0); | |
3154 | ||
3155 | /* Determine where to check text properties. Avoid doing it | |
3156 | where possible because text property lookup is very expensive. */ | |
3157 | if (force_p | |
3158 | || CHARPOS (pos) > it->stop_charpos | |
3159 | || CHARPOS (pos) < original_pos) | |
3160 | handle_stop (it); | |
3161 | ||
3162 | CHECK_IT (it); | |
3163 | } | |
3164 | ||
3165 | ||
3166 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3167 | IT->stop_pos to POS, also. */ | |
3168 | ||
3169 | static void | |
3170 | reseat_1 (it, pos, set_stop_p) | |
3171 | struct it *it; | |
3172 | struct text_pos pos; | |
3173 | int set_stop_p; | |
3174 | { | |
3175 | /* Don't call this function when scanning a C string. */ | |
3176 | xassert (it->s == NULL); | |
3177 | ||
3178 | /* POS must be a reasonable value. */ | |
3179 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3180 | ||
3181 | it->current.pos = it->position = pos; | |
3182 | XSETBUFFER (it->object, current_buffer); | |
3183 | it->dpvec = NULL; | |
3184 | it->current.dpvec_index = -1; | |
3185 | it->current.overlay_string_index = -1; | |
3186 | IT_STRING_CHARPOS (*it) = -1; | |
3187 | IT_STRING_BYTEPOS (*it) = -1; | |
3188 | it->string = Qnil; | |
3189 | it->method = next_element_from_buffer; | |
3190 | it->sp = 0; | |
3191 | ||
3192 | if (set_stop_p) | |
3193 | it->stop_charpos = CHARPOS (pos); | |
3194 | } | |
3195 | ||
3196 | ||
3197 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3198 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3199 | STRING gives a Lisp string to iterate over. | |
3200 | ||
3201 | If PRECISION > 0, don't return more then PRECISION number of | |
3202 | characters from the string. | |
3203 | ||
3204 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3205 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3206 | field width. | |
3207 | ||
3208 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3209 | MULTIBYTE > 0 means enable it, | |
3210 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3211 | ||
3212 | IT must be initialized via a prior call to init_iterator before | |
3213 | calling this function. */ | |
3214 | ||
3215 | static void | |
3216 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3217 | struct it *it; | |
3218 | unsigned char *s; | |
3219 | Lisp_Object string; | |
3220 | int charpos; | |
3221 | int precision, field_width, multibyte; | |
3222 | { | |
3223 | /* No region in strings. */ | |
3224 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3225 | ||
3226 | /* No text property checks performed by default, but see below. */ | |
3227 | it->stop_charpos = -1; | |
3228 | ||
3229 | /* Set iterator position and end position. */ | |
3230 | bzero (&it->current, sizeof it->current); | |
3231 | it->current.overlay_string_index = -1; | |
3232 | it->current.dpvec_index = -1; | |
5f5c8ee5 GM |
3233 | xassert (charpos >= 0); |
3234 | ||
3235 | /* Use the setting of MULTIBYTE if specified. */ | |
3236 | if (multibyte >= 0) | |
3237 | it->multibyte_p = multibyte > 0; | |
3238 | ||
3239 | if (s == NULL) | |
3240 | { | |
3241 | xassert (STRINGP (string)); | |
3242 | it->string = string; | |
3243 | it->s = NULL; | |
3244 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3245 | it->method = next_element_from_string; | |
3246 | it->current.string_pos = string_pos (charpos, string); | |
3247 | } | |
3248 | else | |
3249 | { | |
3250 | it->s = s; | |
3251 | it->string = Qnil; | |
3252 | ||
3253 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3254 | for displaying C strings. */ | |
3255 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3256 | if (it->multibyte_p) | |
3257 | { | |
3258 | it->current.pos = c_string_pos (charpos, s, 1); | |
3259 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3260 | } | |
3261 | else | |
3262 | { | |
3263 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3264 | it->end_charpos = it->string_nchars = strlen (s); | |
3265 | } | |
3266 | ||
3267 | it->method = next_element_from_c_string; | |
3268 | } | |
3269 | ||
3270 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3271 | from the string. */ | |
3272 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3273 | it->end_charpos = it->string_nchars = charpos + precision; | |
3274 | ||
3275 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3276 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3277 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3278 | padding with `-' at the end of a mode line. */ | |
3279 | if (field_width < 0) | |
3280 | field_width = INFINITY; | |
3281 | if (field_width > it->end_charpos - charpos) | |
3282 | it->end_charpos = charpos + field_width; | |
3283 | ||
3284 | /* Use the standard display table for displaying strings. */ | |
3285 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3286 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3287 | ||
3288 | it->stop_charpos = charpos; | |
3289 | CHECK_IT (it); | |
3290 | } | |
3291 | ||
3292 | ||
3293 | \f | |
3294 | /*********************************************************************** | |
3295 | Iteration | |
3296 | ***********************************************************************/ | |
3297 | ||
3298 | /* Load IT's display element fields with information about the next | |
3299 | display element from the current position of IT. Value is zero if | |
3300 | end of buffer (or C string) is reached. */ | |
3301 | ||
3302 | int | |
3303 | get_next_display_element (it) | |
3304 | struct it *it; | |
3305 | { | |
3306 | /* Non-zero means that we found an display element. Zero means that | |
3307 | we hit the end of what we iterate over. Performance note: the | |
3308 | function pointer `method' used here turns out to be faster than | |
3309 | using a sequence of if-statements. */ | |
3310 | int success_p = (*it->method) (it); | |
5f5c8ee5 GM |
3311 | |
3312 | if (it->what == IT_CHARACTER) | |
3313 | { | |
3314 | /* Map via display table or translate control characters. | |
3315 | IT->c, IT->len etc. have been set to the next character by | |
3316 | the function call above. If we have a display table, and it | |
3317 | contains an entry for IT->c, translate it. Don't do this if | |
3318 | IT->c itself comes from a display table, otherwise we could | |
3319 | end up in an infinite recursion. (An alternative could be to | |
3320 | count the recursion depth of this function and signal an | |
3321 | error when a certain maximum depth is reached.) Is it worth | |
3322 | it? */ | |
3323 | if (success_p && it->dpvec == NULL) | |
3324 | { | |
3325 | Lisp_Object dv; | |
3326 | ||
3327 | if (it->dp | |
3328 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3329 | VECTORP (dv))) | |
3330 | { | |
3331 | struct Lisp_Vector *v = XVECTOR (dv); | |
3332 | ||
3333 | /* Return the first character from the display table | |
3334 | entry, if not empty. If empty, don't display the | |
3335 | current character. */ | |
3336 | if (v->size) | |
3337 | { | |
3338 | it->dpvec_char_len = it->len; | |
3339 | it->dpvec = v->contents; | |
3340 | it->dpend = v->contents + v->size; | |
3341 | it->current.dpvec_index = 0; | |
3342 | it->method = next_element_from_display_vector; | |
3343 | } | |
3344 | ||
3345 | success_p = get_next_display_element (it); | |
3346 | } | |
3347 | ||
3348 | /* Translate control characters into `\003' or `^C' form. | |
3349 | Control characters coming from a display table entry are | |
3350 | currently not translated because we use IT->dpvec to hold | |
3351 | the translation. This could easily be changed but I | |
197516c2 KH |
3352 | don't believe that it is worth doing. |
3353 | ||
3354 | Non-printable multibyte characters are also translated | |
3355 | octal form. */ | |
5f5c8ee5 GM |
3356 | else if ((it->c < ' ' |
3357 | && (it->area != TEXT_AREA | |
c6e89d6c | 3358 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 3359 | || (it->c >= 127 |
197516c2 KH |
3360 | && it->len == 1) |
3361 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
3362 | { |
3363 | /* IT->c is a control character which must be displayed | |
3364 | either as '\003' or as `^C' where the '\\' and '^' | |
3365 | can be defined in the display table. Fill | |
3366 | IT->ctl_chars with glyphs for what we have to | |
3367 | display. Then, set IT->dpvec to these glyphs. */ | |
3368 | GLYPH g; | |
3369 | ||
54c85a23 | 3370 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3371 | { |
3372 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3373 | if (it->dp | |
3374 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3375 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3376 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3377 | else | |
3378 | g = FAST_MAKE_GLYPH ('^', 0); | |
3379 | XSETINT (it->ctl_chars[0], g); | |
3380 | ||
3381 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3382 | XSETINT (it->ctl_chars[1], g); | |
3383 | ||
3384 | /* Set up IT->dpvec and return first character from it. */ | |
3385 | it->dpvec_char_len = it->len; | |
3386 | it->dpvec = it->ctl_chars; | |
3387 | it->dpend = it->dpvec + 2; | |
3388 | it->current.dpvec_index = 0; | |
3389 | it->method = next_element_from_display_vector; | |
3390 | get_next_display_element (it); | |
3391 | } | |
3392 | else | |
3393 | { | |
260a86a0 KH |
3394 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
3395 | int len = CHAR_STRING (it->c, str); | |
197516c2 KH |
3396 | int i; |
3397 | GLYPH escape_glyph; | |
3398 | ||
5f5c8ee5 GM |
3399 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
3400 | if (it->dp | |
3401 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3402 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 3403 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 3404 | else |
197516c2 KH |
3405 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
3406 | ||
3407 | for (i = 0; i < len; i++) | |
3408 | { | |
3409 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
3410 | /* Insert three more glyphs into IT->ctl_chars for | |
3411 | the octal display of the character. */ | |
3412 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
3413 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
3414 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
3415 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
3416 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
3417 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
3418 | } | |
5f5c8ee5 GM |
3419 | |
3420 | /* Set up IT->dpvec and return the first character | |
3421 | from it. */ | |
3422 | it->dpvec_char_len = it->len; | |
3423 | it->dpvec = it->ctl_chars; | |
197516c2 | 3424 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
3425 | it->current.dpvec_index = 0; |
3426 | it->method = next_element_from_display_vector; | |
3427 | get_next_display_element (it); | |
3428 | } | |
3429 | } | |
3430 | } | |
3431 | ||
980806b6 KH |
3432 | /* Adjust face id for a multibyte character. There are no |
3433 | multibyte character in unibyte text. */ | |
5f5c8ee5 GM |
3434 | if (it->multibyte_p |
3435 | && success_p | |
980806b6 | 3436 | && FRAME_WINDOW_P (it->f)) |
5f5c8ee5 | 3437 | { |
980806b6 KH |
3438 | struct face *face = FACE_FROM_ID (it->f, it->face_id); |
3439 | it->face_id = FACE_FOR_CHAR (it->f, face, it->c); | |
5f5c8ee5 GM |
3440 | } |
3441 | } | |
3442 | ||
3443 | /* Is this character the last one of a run of characters with | |
3444 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3445 | if (it->face_box_p | |
3446 | && it->s == NULL) | |
3447 | { | |
3448 | int face_id; | |
3449 | struct face *face; | |
3450 | ||
3451 | it->end_of_box_run_p | |
3452 | = ((face_id = face_after_it_pos (it), | |
3453 | face_id != it->face_id) | |
3454 | && (face = FACE_FROM_ID (it->f, face_id), | |
3455 | face->box == FACE_NO_BOX)); | |
3456 | } | |
3457 | ||
3458 | /* Value is 0 if end of buffer or string reached. */ | |
3459 | return success_p; | |
3460 | } | |
3461 | ||
3462 | ||
3463 | /* Move IT to the next display element. | |
3464 | ||
3465 | Functions get_next_display_element and set_iterator_to_next are | |
3466 | separate because I find this arrangement easier to handle than a | |
3467 | get_next_display_element function that also increments IT's | |
3468 | position. The way it is we can first look at an iterator's current | |
3469 | display element, decide whether it fits on a line, and if it does, | |
3470 | increment the iterator position. The other way around we probably | |
3471 | would either need a flag indicating whether the iterator has to be | |
3472 | incremented the next time, or we would have to implement a | |
3473 | decrement position function which would not be easy to write. */ | |
3474 | ||
3475 | void | |
3476 | set_iterator_to_next (it) | |
3477 | struct it *it; | |
3478 | { | |
3479 | if (it->method == next_element_from_buffer) | |
3480 | { | |
3481 | /* The current display element of IT is a character from | |
3482 | current_buffer. Advance in the buffer, and maybe skip over | |
3483 | invisible lines that are so because of selective display. */ | |
3484 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3485 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3486 | else |
3487 | { | |
3488 | xassert (it->len != 0); | |
3489 | IT_BYTEPOS (*it) += it->len; | |
3490 | IT_CHARPOS (*it) += 1; | |
3491 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3492 | } | |
3493 | } | |
260a86a0 KH |
3494 | else if (it->method == next_element_from_composition) |
3495 | { | |
3496 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
3497 | if (STRINGP (it->string)) | |
3498 | { | |
3499 | IT_STRING_BYTEPOS (*it) += it->len; | |
3500 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
3501 | it->method = next_element_from_string; | |
3502 | goto consider_string_end; | |
3503 | } | |
3504 | else | |
3505 | { | |
3506 | IT_BYTEPOS (*it) += it->len; | |
3507 | IT_CHARPOS (*it) += it->cmp_len; | |
3508 | it->method = next_element_from_buffer; | |
3509 | } | |
3510 | } | |
5f5c8ee5 GM |
3511 | else if (it->method == next_element_from_c_string) |
3512 | { | |
3513 | /* Current display element of IT is from a C string. */ | |
3514 | IT_BYTEPOS (*it) += it->len; | |
3515 | IT_CHARPOS (*it) += 1; | |
3516 | } | |
3517 | else if (it->method == next_element_from_display_vector) | |
3518 | { | |
3519 | /* Current display element of IT is from a display table entry. | |
3520 | Advance in the display table definition. Reset it to null if | |
3521 | end reached, and continue with characters from buffers/ | |
3522 | strings. */ | |
3523 | ++it->current.dpvec_index; | |
286bcbc9 | 3524 | |
980806b6 KH |
3525 | /* Restore face of the iterator to what they were before the |
3526 | display vector entry (these entries may contain faces). */ | |
5f5c8ee5 | 3527 | it->face_id = it->saved_face_id; |
286bcbc9 | 3528 | |
5f5c8ee5 GM |
3529 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3530 | { | |
3531 | if (it->s) | |
3532 | it->method = next_element_from_c_string; | |
3533 | else if (STRINGP (it->string)) | |
3534 | it->method = next_element_from_string; | |
3535 | else | |
3536 | it->method = next_element_from_buffer; | |
3537 | ||
3538 | it->dpvec = NULL; | |
3539 | it->current.dpvec_index = -1; | |
3540 | ||
312246d1 GM |
3541 | /* Skip over characters which were displayed via IT->dpvec. */ |
3542 | if (it->dpvec_char_len < 0) | |
3543 | reseat_at_next_visible_line_start (it, 1); | |
3544 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3545 | { |
3546 | it->len = it->dpvec_char_len; | |
3547 | set_iterator_to_next (it); | |
3548 | } | |
3549 | } | |
3550 | } | |
3551 | else if (it->method == next_element_from_string) | |
3552 | { | |
3553 | /* Current display element is a character from a Lisp string. */ | |
3554 | xassert (it->s == NULL && STRINGP (it->string)); | |
3555 | IT_STRING_BYTEPOS (*it) += it->len; | |
3556 | IT_STRING_CHARPOS (*it) += 1; | |
3557 | ||
3558 | consider_string_end: | |
3559 | ||
3560 | if (it->current.overlay_string_index >= 0) | |
3561 | { | |
3562 | /* IT->string is an overlay string. Advance to the | |
3563 | next, if there is one. */ | |
3564 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3565 | next_overlay_string (it); | |
3566 | } | |
3567 | else | |
3568 | { | |
3569 | /* IT->string is not an overlay string. If we reached | |
3570 | its end, and there is something on IT->stack, proceed | |
3571 | with what is on the stack. This can be either another | |
3572 | string, this time an overlay string, or a buffer. */ | |
3573 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3574 | && it->sp > 0) | |
3575 | { | |
3576 | pop_it (it); | |
3577 | if (!STRINGP (it->string)) | |
3578 | it->method = next_element_from_buffer; | |
3579 | } | |
3580 | } | |
3581 | } | |
3582 | else if (it->method == next_element_from_image | |
3583 | || it->method == next_element_from_stretch) | |
3584 | { | |
3585 | /* The position etc with which we have to proceed are on | |
3586 | the stack. The position may be at the end of a string, | |
3587 | if the `display' property takes up the whole string. */ | |
3588 | pop_it (it); | |
3589 | it->image_id = 0; | |
3590 | if (STRINGP (it->string)) | |
3591 | { | |
3592 | it->method = next_element_from_string; | |
3593 | goto consider_string_end; | |
3594 | } | |
3595 | else | |
3596 | it->method = next_element_from_buffer; | |
3597 | } | |
3598 | else | |
3599 | /* There are no other methods defined, so this should be a bug. */ | |
3600 | abort (); | |
3601 | ||
3602 | /* Reset flags indicating start and end of a sequence of | |
3603 | characters with box. */ | |
3604 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3605 | ||
3606 | xassert (it->method != next_element_from_string | |
3607 | || (STRINGP (it->string) | |
3608 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3609 | } | |
3610 | ||
3611 | ||
3612 | /* Load IT's display element fields with information about the next | |
3613 | display element which comes from a display table entry or from the | |
3614 | result of translating a control character to one of the forms `^C' | |
3615 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3616 | ||
3617 | static int | |
3618 | next_element_from_display_vector (it) | |
3619 | struct it *it; | |
3620 | { | |
3621 | /* Precondition. */ | |
3622 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3623 | ||
3624 | /* Remember the current face id in case glyphs specify faces. | |
3625 | IT's face is restored in set_iterator_to_next. */ | |
3626 | it->saved_face_id = it->face_id; | |
3627 | ||
3628 | if (INTEGERP (*it->dpvec) | |
3629 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3630 | { | |
3631 | int lface_id; | |
3632 | GLYPH g; | |
3633 | ||
3634 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3635 | it->c = FAST_GLYPH_CHAR (g); | |
3636 | it->len = CHAR_LEN (it->c); | |
3637 | ||
3638 | /* The entry may contain a face id to use. Such a face id is | |
3639 | the id of a Lisp face, not a realized face. A face id of | |
3640 | zero means no face. */ | |
3641 | lface_id = FAST_GLYPH_FACE (g); | |
3642 | if (lface_id) | |
3643 | { | |
3644 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); | |
3645 | if (face_id >= 0) | |
3646 | { | |
3647 | it->face_id = face_id; | |
5f5c8ee5 GM |
3648 | } |
3649 | } | |
3650 | } | |
3651 | else | |
3652 | /* Display table entry is invalid. Return a space. */ | |
3653 | it->c = ' ', it->len = 1; | |
3654 | ||
3655 | /* Don't change position and object of the iterator here. They are | |
3656 | still the values of the character that had this display table | |
3657 | entry or was translated, and that's what we want. */ | |
3658 | it->what = IT_CHARACTER; | |
3659 | return 1; | |
3660 | } | |
3661 | ||
3662 | ||
3663 | /* Load IT with the next display element from Lisp string IT->string. | |
3664 | IT->current.string_pos is the current position within the string. | |
3665 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3666 | overlay string. */ | |
3667 | ||
3668 | static int | |
3669 | next_element_from_string (it) | |
3670 | struct it *it; | |
3671 | { | |
3672 | struct text_pos position; | |
3673 | ||
3674 | xassert (STRINGP (it->string)); | |
3675 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3676 | position = it->current.string_pos; | |
3677 | ||
3678 | /* Time to check for invisible text? */ | |
3679 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3680 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3681 | { | |
3682 | handle_stop (it); | |
3683 | ||
3684 | /* Since a handler may have changed IT->method, we must | |
3685 | recurse here. */ | |
3686 | return get_next_display_element (it); | |
3687 | } | |
3688 | ||
3689 | if (it->current.overlay_string_index >= 0) | |
3690 | { | |
3691 | /* Get the next character from an overlay string. In overlay | |
3692 | strings, There is no field width or padding with spaces to | |
3693 | do. */ | |
3694 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3695 | { | |
3696 | it->what = IT_EOB; | |
3697 | return 0; | |
3698 | } | |
3699 | else if (STRING_MULTIBYTE (it->string)) | |
3700 | { | |
3701 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3702 | - IT_STRING_BYTEPOS (*it)); | |
3703 | unsigned char *s = (XSTRING (it->string)->data | |
3704 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3705 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3706 | } |
3707 | else | |
3708 | { | |
3709 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3710 | it->len = 1; | |
3711 | } | |
3712 | } | |
3713 | else | |
3714 | { | |
3715 | /* Get the next character from a Lisp string that is not an | |
3716 | overlay string. Such strings come from the mode line, for | |
3717 | example. We may have to pad with spaces, or truncate the | |
3718 | string. See also next_element_from_c_string. */ | |
3719 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3720 | { | |
3721 | it->what = IT_EOB; | |
3722 | return 0; | |
3723 | } | |
3724 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3725 | { | |
3726 | /* Pad with spaces. */ | |
3727 | it->c = ' ', it->len = 1; | |
3728 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3729 | } | |
3730 | else if (STRING_MULTIBYTE (it->string)) | |
3731 | { | |
3732 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3733 | - IT_STRING_BYTEPOS (*it)); | |
3734 | unsigned char *s = (XSTRING (it->string)->data | |
3735 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3736 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3737 | } |
3738 | else | |
3739 | { | |
3740 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3741 | it->len = 1; | |
3742 | } | |
3743 | } | |
3744 | ||
3745 | /* Record what we have and where it came from. Note that we store a | |
3746 | buffer position in IT->position although it could arguably be a | |
3747 | string position. */ | |
3748 | it->what = IT_CHARACTER; | |
3749 | it->object = it->string; | |
3750 | it->position = position; | |
3751 | return 1; | |
3752 | } | |
3753 | ||
3754 | ||
3755 | /* Load IT with next display element from C string IT->s. | |
3756 | IT->string_nchars is the maximum number of characters to return | |
3757 | from the string. IT->end_charpos may be greater than | |
3758 | IT->string_nchars when this function is called, in which case we | |
3759 | may have to return padding spaces. Value is zero if end of string | |
3760 | reached, including padding spaces. */ | |
3761 | ||
3762 | static int | |
3763 | next_element_from_c_string (it) | |
3764 | struct it *it; | |
3765 | { | |
3766 | int success_p = 1; | |
3767 | ||
3768 | xassert (it->s); | |
3769 | it->what = IT_CHARACTER; | |
3770 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
3771 | it->object = Qnil; | |
3772 | ||
3773 | /* IT's position can be greater IT->string_nchars in case a field | |
3774 | width or precision has been specified when the iterator was | |
3775 | initialized. */ | |
3776 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3777 | { | |
3778 | /* End of the game. */ | |
3779 | it->what = IT_EOB; | |
3780 | success_p = 0; | |
3781 | } | |
3782 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
3783 | { | |
3784 | /* Pad with spaces. */ | |
3785 | it->c = ' ', it->len = 1; | |
3786 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
3787 | } | |
3788 | else if (it->multibyte_p) | |
3789 | { | |
3790 | /* Implementation note: The calls to strlen apparently aren't a | |
3791 | performance problem because there is no noticeable performance | |
3792 | difference between Emacs running in unibyte or multibyte mode. */ | |
3793 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
3794 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
3795 | maxlen, &it->len); | |
5f5c8ee5 GM |
3796 | } |
3797 | else | |
3798 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
3799 | ||
3800 | return success_p; | |
3801 | } | |
3802 | ||
3803 | ||
3804 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
3805 | The definition of the ellipsis glyphs may come from a display table | |
3806 | entry. This function Fills IT with the first glyph from the | |
3807 | ellipsis if an ellipsis is to be displayed. */ | |
3808 | ||
13f19968 | 3809 | static int |
5f5c8ee5 GM |
3810 | next_element_from_ellipsis (it) |
3811 | struct it *it; | |
3812 | { | |
13f19968 | 3813 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 3814 | { |
13f19968 GM |
3815 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
3816 | { | |
3817 | /* Use the display table definition for `...'. Invalid glyphs | |
3818 | will be handled by the method returning elements from dpvec. */ | |
3819 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3820 | it->dpvec_char_len = it->len; | |
3821 | it->dpvec = v->contents; | |
3822 | it->dpend = v->contents + v->size; | |
3823 | it->current.dpvec_index = 0; | |
3824 | it->method = next_element_from_display_vector; | |
3825 | } | |
3826 | else | |
3827 | { | |
3828 | /* Use default `...' which is stored in default_invis_vector. */ | |
3829 | it->dpvec_char_len = it->len; | |
3830 | it->dpvec = default_invis_vector; | |
3831 | it->dpend = default_invis_vector + 3; | |
3832 | it->current.dpvec_index = 0; | |
3833 | it->method = next_element_from_display_vector; | |
3834 | } | |
5f5c8ee5 | 3835 | } |
13f19968 GM |
3836 | else |
3837 | reseat_at_next_visible_line_start (it, 1); | |
3838 | ||
3839 | return get_next_display_element (it); | |
5f5c8ee5 GM |
3840 | } |
3841 | ||
3842 | ||
3843 | /* Deliver an image display element. The iterator IT is already | |
3844 | filled with image information (done in handle_display_prop). Value | |
3845 | is always 1. */ | |
3846 | ||
3847 | ||
3848 | static int | |
3849 | next_element_from_image (it) | |
3850 | struct it *it; | |
3851 | { | |
3852 | it->what = IT_IMAGE; | |
3853 | return 1; | |
3854 | } | |
3855 | ||
3856 | ||
3857 | /* Fill iterator IT with next display element from a stretch glyph | |
3858 | property. IT->object is the value of the text property. Value is | |
3859 | always 1. */ | |
3860 | ||
3861 | static int | |
3862 | next_element_from_stretch (it) | |
3863 | struct it *it; | |
3864 | { | |
3865 | it->what = IT_STRETCH; | |
3866 | return 1; | |
3867 | } | |
3868 | ||
3869 | ||
3870 | /* Load IT with the next display element from current_buffer. Value | |
3871 | is zero if end of buffer reached. IT->stop_charpos is the next | |
3872 | position at which to stop and check for text properties or buffer | |
3873 | end. */ | |
3874 | ||
3875 | static int | |
3876 | next_element_from_buffer (it) | |
3877 | struct it *it; | |
3878 | { | |
3879 | int success_p = 1; | |
3880 | ||
3881 | /* Check this assumption, otherwise, we would never enter the | |
3882 | if-statement, below. */ | |
3883 | xassert (IT_CHARPOS (*it) >= BEGV | |
3884 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
3885 | ||
3886 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
3887 | { | |
3888 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3889 | { | |
3890 | int overlay_strings_follow_p; | |
3891 | ||
3892 | /* End of the game, except when overlay strings follow that | |
3893 | haven't been returned yet. */ | |
3894 | if (it->overlay_strings_at_end_processed_p) | |
3895 | overlay_strings_follow_p = 0; | |
3896 | else | |
3897 | { | |
3898 | it->overlay_strings_at_end_processed_p = 1; | |
c880678e | 3899 | overlay_strings_follow_p = get_overlay_strings (it); |
5f5c8ee5 GM |
3900 | } |
3901 | ||
3902 | if (overlay_strings_follow_p) | |
3903 | success_p = get_next_display_element (it); | |
3904 | else | |
3905 | { | |
3906 | it->what = IT_EOB; | |
3907 | it->position = it->current.pos; | |
3908 | success_p = 0; | |
3909 | } | |
3910 | } | |
3911 | else | |
3912 | { | |
3913 | handle_stop (it); | |
3914 | return get_next_display_element (it); | |
3915 | } | |
3916 | } | |
3917 | else | |
3918 | { | |
3919 | /* No face changes, overlays etc. in sight, so just return a | |
3920 | character from current_buffer. */ | |
3921 | unsigned char *p; | |
3922 | ||
3923 | /* Maybe run the redisplay end trigger hook. Performance note: | |
3924 | This doesn't seem to cost measurable time. */ | |
3925 | if (it->redisplay_end_trigger_charpos | |
3926 | && it->glyph_row | |
3927 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
3928 | run_redisplay_end_trigger_hook (it); | |
3929 | ||
3930 | /* Get the next character, maybe multibyte. */ | |
3931 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 3932 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
3933 | { |
3934 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
3935 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 3936 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
3937 | } |
3938 | else | |
3939 | it->c = *p, it->len = 1; | |
3940 | ||
3941 | /* Record what we have and where it came from. */ | |
3942 | it->what = IT_CHARACTER;; | |
3943 | it->object = it->w->buffer; | |
3944 | it->position = it->current.pos; | |
3945 | ||
3946 | /* Normally we return the character found above, except when we | |
3947 | really want to return an ellipsis for selective display. */ | |
3948 | if (it->selective) | |
3949 | { | |
3950 | if (it->c == '\n') | |
3951 | { | |
3952 | /* A value of selective > 0 means hide lines indented more | |
3953 | than that number of columns. */ | |
3954 | if (it->selective > 0 | |
3955 | && IT_CHARPOS (*it) + 1 < ZV | |
3956 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
3957 | IT_BYTEPOS (*it) + 1, | |
3958 | it->selective)) | |
312246d1 | 3959 | { |
13f19968 | 3960 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
3961 | it->dpvec_char_len = -1; |
3962 | } | |
5f5c8ee5 GM |
3963 | } |
3964 | else if (it->c == '\r' && it->selective == -1) | |
3965 | { | |
3966 | /* A value of selective == -1 means that everything from the | |
3967 | CR to the end of the line is invisible, with maybe an | |
3968 | ellipsis displayed for it. */ | |
13f19968 | 3969 | success_p = next_element_from_ellipsis (it); |
312246d1 | 3970 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
3971 | } |
3972 | } | |
3973 | } | |
3974 | ||
3975 | /* Value is zero if end of buffer reached. */ | |
c880678e | 3976 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
3977 | return success_p; |
3978 | } | |
3979 | ||
3980 | ||
3981 | /* Run the redisplay end trigger hook for IT. */ | |
3982 | ||
3983 | static void | |
3984 | run_redisplay_end_trigger_hook (it) | |
3985 | struct it *it; | |
3986 | { | |
3987 | Lisp_Object args[3]; | |
3988 | ||
3989 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
3990 | displaying something, or otherwise we should not run the hook. */ | |
3991 | xassert (it->glyph_row); | |
3992 | ||
3993 | /* Set up hook arguments. */ | |
3994 | args[0] = Qredisplay_end_trigger_functions; | |
3995 | args[1] = it->window; | |
3996 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
3997 | it->redisplay_end_trigger_charpos = 0; | |
3998 | ||
3999 | /* Since we are *trying* to run these functions, don't try to run | |
4000 | them again, even if they get an error. */ | |
4001 | it->w->redisplay_end_trigger = Qnil; | |
4002 | Frun_hook_with_args (3, args); | |
4003 | ||
4004 | /* Notice if it changed the face of the character we are on. */ | |
4005 | handle_face_prop (it); | |
4006 | } | |
4007 | ||
4008 | ||
260a86a0 KH |
4009 | /* Deliver a composition display element. The iterator IT is already |
4010 | filled with composition information (done in | |
4011 | handle_composition_prop). Value is always 1. */ | |
4012 | ||
4013 | static int | |
4014 | next_element_from_composition (it) | |
4015 | struct it *it; | |
4016 | { | |
4017 | it->what = IT_COMPOSITION; | |
4018 | it->position = (STRINGP (it->string) | |
4019 | ? it->current.string_pos | |
4020 | : it->current.pos); | |
4021 | return 1; | |
4022 | } | |
4023 | ||
4024 | ||
5f5c8ee5 GM |
4025 | \f |
4026 | /*********************************************************************** | |
4027 | Moving an iterator without producing glyphs | |
4028 | ***********************************************************************/ | |
4029 | ||
4030 | /* Move iterator IT to a specified buffer or X position within one | |
4031 | line on the display without producing glyphs. | |
4032 | ||
4033 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
4034 | whichever is reached first. | |
4035 | ||
4036 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
4037 | ||
4038 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
4039 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
4040 | TO_X includes the amount by which a window is horizontally | |
4041 | scrolled. | |
4042 | ||
4043 | Value is | |
4044 | ||
4045 | MOVE_POS_MATCH_OR_ZV | |
4046 | - when TO_POS or ZV was reached. | |
4047 | ||
4048 | MOVE_X_REACHED | |
4049 | -when TO_X was reached before TO_POS or ZV were reached. | |
4050 | ||
4051 | MOVE_LINE_CONTINUED | |
4052 | - when we reached the end of the display area and the line must | |
4053 | be continued. | |
4054 | ||
4055 | MOVE_LINE_TRUNCATED | |
4056 | - when we reached the end of the display area and the line is | |
4057 | truncated. | |
4058 | ||
4059 | MOVE_NEWLINE_OR_CR | |
4060 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
4061 | display is on. */ | |
4062 | ||
701552dd | 4063 | static enum move_it_result |
5f5c8ee5 GM |
4064 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
4065 | struct it *it; | |
4066 | int to_charpos, to_x, op; | |
4067 | { | |
4068 | enum move_it_result result = MOVE_UNDEFINED; | |
4069 | struct glyph_row *saved_glyph_row; | |
4070 | ||
4071 | /* Don't produce glyphs in produce_glyphs. */ | |
4072 | saved_glyph_row = it->glyph_row; | |
4073 | it->glyph_row = NULL; | |
4074 | ||
5f5c8ee5 GM |
4075 | while (1) |
4076 | { | |
4077 | int x, i; | |
4078 | ||
4079 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4080 | if (!get_next_display_element (it) | |
4081 | || ((op & MOVE_TO_POS) != 0 | |
4082 | && BUFFERP (it->object) | |
4083 | && IT_CHARPOS (*it) >= to_charpos)) | |
4084 | { | |
4085 | result = MOVE_POS_MATCH_OR_ZV; | |
4086 | break; | |
4087 | } | |
4088 | ||
4089 | /* The call to produce_glyphs will get the metrics of the | |
4090 | display element IT is loaded with. We record in x the | |
4091 | x-position before this display element in case it does not | |
4092 | fit on the line. */ | |
4093 | x = it->current_x; | |
4094 | PRODUCE_GLYPHS (it); | |
4095 | ||
4096 | if (it->area != TEXT_AREA) | |
4097 | { | |
4098 | set_iterator_to_next (it); | |
4099 | continue; | |
4100 | } | |
4101 | ||
4102 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4103 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4104 | character on a terminal frame, or (iii) a line end. For the | |
4105 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4106 | (on X frames, there is only one glyph produced for a | |
4107 | composite character. | |
4108 | ||
4109 | The behavior implemented below means, for continuation lines, | |
4110 | that as many spaces of a TAB as fit on the current line are | |
4111 | displayed there. For terminal frames, as many glyphs of a | |
4112 | multi-glyph character are displayed in the current line, too. | |
4113 | This is what the old redisplay code did, and we keep it that | |
4114 | way. Under X, the whole shape of a complex character must | |
4115 | fit on the line or it will be completely displayed in the | |
4116 | next line. | |
4117 | ||
4118 | Note that both for tabs and padding glyphs, all glyphs have | |
4119 | the same width. */ | |
4120 | if (it->nglyphs) | |
4121 | { | |
4122 | /* More than one glyph or glyph doesn't fit on line. All | |
4123 | glyphs have the same width. */ | |
4124 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4125 | int new_x; | |
4126 | ||
4127 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4128 | { | |
4129 | new_x = x + single_glyph_width; | |
4130 | ||
4131 | /* We want to leave anything reaching TO_X to the caller. */ | |
4132 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4133 | { | |
4134 | it->current_x = x; | |
4135 | result = MOVE_X_REACHED; | |
4136 | break; | |
4137 | } | |
4138 | else if (/* Lines are continued. */ | |
4139 | !it->truncate_lines_p | |
4140 | && (/* And glyph doesn't fit on the line. */ | |
4141 | new_x > it->last_visible_x | |
4142 | /* Or it fits exactly and we're on a window | |
4143 | system frame. */ | |
4144 | || (new_x == it->last_visible_x | |
4145 | && FRAME_WINDOW_P (it->f)))) | |
4146 | { | |
4147 | if (/* IT->hpos == 0 means the very first glyph | |
4148 | doesn't fit on the line, e.g. a wide image. */ | |
4149 | it->hpos == 0 | |
4150 | || (new_x == it->last_visible_x | |
4151 | && FRAME_WINDOW_P (it->f))) | |
4152 | { | |
4153 | ++it->hpos; | |
4154 | it->current_x = new_x; | |
4155 | if (i == it->nglyphs - 1) | |
4156 | set_iterator_to_next (it); | |
4157 | } | |
4158 | else | |
4159 | it->current_x = x; | |
4160 | ||
4161 | result = MOVE_LINE_CONTINUED; | |
4162 | break; | |
4163 | } | |
4164 | else if (new_x > it->first_visible_x) | |
4165 | { | |
4166 | /* Glyph is visible. Increment number of glyphs that | |
4167 | would be displayed. */ | |
4168 | ++it->hpos; | |
4169 | } | |
4170 | else | |
4171 | { | |
4172 | /* Glyph is completely off the left margin of the display | |
4173 | area. Nothing to do. */ | |
4174 | } | |
4175 | } | |
4176 | ||
4177 | if (result != MOVE_UNDEFINED) | |
4178 | break; | |
4179 | } | |
4180 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4181 | { | |
4182 | /* Stop when TO_X specified and reached. This check is | |
4183 | necessary here because of lines consisting of a line end, | |
4184 | only. The line end will not produce any glyphs and we | |
4185 | would never get MOVE_X_REACHED. */ | |
4186 | xassert (it->nglyphs == 0); | |
4187 | result = MOVE_X_REACHED; | |
4188 | break; | |
4189 | } | |
4190 | ||
4191 | /* Is this a line end? If yes, we're done. */ | |
4192 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4193 | { | |
4194 | result = MOVE_NEWLINE_OR_CR; | |
4195 | break; | |
4196 | } | |
4197 | ||
4198 | /* The current display element has been consumed. Advance | |
4199 | to the next. */ | |
4200 | set_iterator_to_next (it); | |
4201 | ||
4202 | /* Stop if lines are truncated and IT's current x-position is | |
4203 | past the right edge of the window now. */ | |
4204 | if (it->truncate_lines_p | |
4205 | && it->current_x >= it->last_visible_x) | |
4206 | { | |
4207 | result = MOVE_LINE_TRUNCATED; | |
4208 | break; | |
4209 | } | |
4210 | } | |
4211 | ||
4212 | /* Restore the iterator settings altered at the beginning of this | |
4213 | function. */ | |
4214 | it->glyph_row = saved_glyph_row; | |
4215 | return result; | |
4216 | } | |
4217 | ||
4218 | ||
4219 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4220 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4221 | the description of enum move_operation_enum. | |
4222 | ||
4223 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4224 | screen line, this function will set IT to the next position > | |
4225 | TO_CHARPOS. */ | |
4226 | ||
4227 | void | |
4228 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4229 | struct it *it; | |
4230 | int to_charpos, to_x, to_y, to_vpos; | |
4231 | int op; | |
4232 | { | |
4233 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4234 | int line_height; | |
4235 | ||
5f5c8ee5 GM |
4236 | while (1) |
4237 | { | |
4238 | if (op & MOVE_TO_VPOS) | |
4239 | { | |
4240 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4241 | start of the line TO_VPOS. */ | |
4242 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4243 | { | |
4244 | if (it->vpos == to_vpos) | |
4245 | break; | |
4246 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
4247 | } | |
4248 | else | |
4249 | { | |
4250 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4251 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
4252 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); | |
4253 | ||
4254 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
4255 | break; | |
4256 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) | |
4257 | { | |
4258 | /* We have reached TO_X but not in the line we want. */ | |
4259 | skip = move_it_in_display_line_to (it, to_charpos, | |
4260 | -1, MOVE_TO_POS); | |
4261 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4262 | break; | |
4263 | } | |
4264 | } | |
4265 | } | |
4266 | else if (op & MOVE_TO_Y) | |
4267 | { | |
4268 | struct it it_backup; | |
4269 | int done_p; | |
4270 | ||
4271 | /* TO_Y specified means stop at TO_X in the line containing | |
4272 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4273 | problem is that we can't really tell whether the line | |
4274 | contains TO_Y before we have completely scanned it, and | |
4275 | this may skip past TO_X. What we do is to first scan to | |
4276 | TO_X. | |
4277 | ||
4278 | If TO_X is not specified, use a TO_X of zero. The reason | |
4279 | is to make the outcome of this function more predictable. | |
4280 | If we didn't use TO_X == 0, we would stop at the end of | |
4281 | the line which is probably not what a caller would expect | |
4282 | to happen. */ | |
4283 | skip = move_it_in_display_line_to (it, to_charpos, | |
4284 | ((op & MOVE_TO_X) | |
4285 | ? to_x : 0), | |
4286 | (MOVE_TO_X | |
4287 | | (op & MOVE_TO_POS))); | |
4288 | ||
4289 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4290 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4291 | break; | |
4292 | ||
4293 | /* If TO_X was reached, we would like to know whether TO_Y | |
4294 | is in the line. This can only be said if we know the | |
4295 | total line height which requires us to scan the rest of | |
4296 | the line. */ | |
4297 | done_p = 0; | |
4298 | if (skip == MOVE_X_REACHED) | |
4299 | { | |
4300 | it_backup = *it; | |
4301 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, | |
4302 | op & MOVE_TO_POS); | |
4303 | } | |
4304 | ||
4305 | /* Now, decide whether TO_Y is in this line. */ | |
4306 | line_height = it->max_ascent + it->max_descent; | |
4307 | ||
4308 | if (to_y >= it->current_y | |
4309 | && to_y < it->current_y + line_height) | |
4310 | { | |
4311 | if (skip == MOVE_X_REACHED) | |
4312 | /* If TO_Y is in this line and TO_X was reached above, | |
4313 | we scanned too far. We have to restore IT's settings | |
4314 | to the ones before skipping. */ | |
4315 | *it = it_backup; | |
4316 | done_p = 1; | |
4317 | } | |
4318 | else if (skip == MOVE_X_REACHED) | |
4319 | { | |
4320 | skip = skip2; | |
4321 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4322 | done_p = 1; | |
4323 | } | |
4324 | ||
4325 | if (done_p) | |
4326 | break; | |
4327 | } | |
4328 | else | |
4329 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4330 | ||
4331 | switch (skip) | |
4332 | { | |
4333 | case MOVE_POS_MATCH_OR_ZV: | |
4334 | return; | |
4335 | ||
4336 | case MOVE_NEWLINE_OR_CR: | |
4337 | set_iterator_to_next (it); | |
4338 | it->continuation_lines_width = 0; | |
4339 | break; | |
4340 | ||
4341 | case MOVE_LINE_TRUNCATED: | |
4342 | it->continuation_lines_width = 0; | |
312246d1 | 4343 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4344 | if ((op & MOVE_TO_POS) != 0 |
4345 | && IT_CHARPOS (*it) > to_charpos) | |
4346 | goto out; | |
4347 | break; | |
4348 | ||
4349 | case MOVE_LINE_CONTINUED: | |
4350 | it->continuation_lines_width += it->current_x; | |
4351 | break; | |
4352 | ||
4353 | default: | |
4354 | abort (); | |
4355 | } | |
4356 | ||
4357 | /* Reset/increment for the next run. */ | |
4358 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4359 | it->current_x = it->hpos = 0; | |
4360 | it->current_y += it->max_ascent + it->max_descent; | |
4361 | ++it->vpos; | |
4362 | last_height = it->max_ascent + it->max_descent; | |
4363 | last_max_ascent = it->max_ascent; | |
4364 | it->max_ascent = it->max_descent = 0; | |
4365 | } | |
4366 | out:; | |
4367 | } | |
4368 | ||
4369 | ||
4370 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4371 | ||
4372 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4373 | means move IT backward to the preceding line start or BEGV. This | |
4374 | function may move over more than DY pixels if IT->current_y - DY | |
4375 | ends up in the middle of a line; in this case IT->current_y will be | |
4376 | set to the top of the line moved to. */ | |
4377 | ||
4378 | void | |
4379 | move_it_vertically_backward (it, dy) | |
4380 | struct it *it; | |
4381 | int dy; | |
4382 | { | |
4383 | int nlines, h, line_height; | |
4384 | struct it it2; | |
4385 | int start_pos = IT_CHARPOS (*it); | |
4386 | ||
4387 | xassert (dy >= 0); | |
4388 | ||
4389 | /* Estimate how many newlines we must move back. */ | |
4390 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4391 | ||
4392 | /* Set the iterator's position that many lines back. */ | |
4393 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4394 | back_to_previous_visible_line_start (it); | |
4395 | ||
4396 | /* Reseat the iterator here. When moving backward, we don't want | |
4397 | reseat to skip forward over invisible text, set up the iterator | |
4398 | to deliver from overlay strings at the new position etc. So, | |
4399 | use reseat_1 here. */ | |
4400 | reseat_1 (it, it->current.pos, 1); | |
4401 | ||
4402 | /* We are now surely at a line start. */ | |
4403 | it->current_x = it->hpos = 0; | |
4404 | ||
4405 | /* Move forward and see what y-distance we moved. First move to the | |
4406 | start of the next line so that we get its height. We need this | |
4407 | height to be able to tell whether we reached the specified | |
4408 | y-distance. */ | |
4409 | it2 = *it; | |
4410 | it2.max_ascent = it2.max_descent = 0; | |
4411 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4412 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4413 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4414 | line_height = it2.max_ascent + it2.max_descent; | |
4415 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); | |
4416 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4417 | h = it2.current_y - it->current_y; | |
4418 | nlines = it2.vpos - it->vpos; | |
4419 | ||
4420 | /* Correct IT's y and vpos position. */ | |
4421 | it->vpos -= nlines; | |
4422 | it->current_y -= h; | |
4423 | ||
4424 | if (dy == 0) | |
4425 | { | |
4426 | /* DY == 0 means move to the start of the screen line. The | |
4427 | value of nlines is > 0 if continuation lines were involved. */ | |
4428 | if (nlines > 0) | |
4429 | move_it_by_lines (it, nlines, 1); | |
4430 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4431 | } | |
4432 | else if (nlines) | |
4433 | { | |
4434 | /* The y-position we try to reach. Note that h has been | |
4435 | subtracted in front of the if-statement. */ | |
4436 | int target_y = it->current_y + h - dy; | |
4437 | ||
4438 | /* If we did not reach target_y, try to move further backward if | |
4439 | we can. If we moved too far backward, try to move forward. */ | |
4440 | if (target_y < it->current_y | |
4441 | && IT_CHARPOS (*it) > BEGV) | |
4442 | { | |
4443 | move_it_vertically (it, target_y - it->current_y); | |
4444 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4445 | } | |
4446 | else if (target_y >= it->current_y + line_height | |
4447 | && IT_CHARPOS (*it) < ZV) | |
4448 | { | |
4449 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4450 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4451 | } | |
4452 | } | |
4453 | } | |
4454 | ||
4455 | ||
4456 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4457 | move backwards. DY = 0 means move to start of screen line. At the | |
4458 | end, IT will be on the start of a screen line. */ | |
4459 | ||
4460 | void | |
4461 | move_it_vertically (it, dy) | |
4462 | struct it *it; | |
4463 | int dy; | |
4464 | { | |
4465 | if (dy <= 0) | |
4466 | move_it_vertically_backward (it, -dy); | |
4467 | else if (dy > 0) | |
4468 | { | |
4469 | move_it_to (it, ZV, -1, it->current_y + dy, -1, | |
4470 | MOVE_TO_POS | MOVE_TO_Y); | |
4471 | ||
4472 | /* If buffer ends in ZV without a newline, move to the start of | |
4473 | the line to satisfy the post-condition. */ | |
4474 | if (IT_CHARPOS (*it) == ZV | |
4475 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4476 | move_it_by_lines (it, 0, 0); | |
4477 | } | |
4478 | } | |
4479 | ||
4480 | ||
4481 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4482 | and END_CHARPOS is invisible. IT->window is the window for text | |
4483 | property lookup. */ | |
4484 | ||
4485 | static int | |
4486 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4487 | struct it *it; | |
4488 | int start_charpos, end_charpos; | |
4489 | { | |
5f5c8ee5 GM |
4490 | Lisp_Object prop, limit; |
4491 | int invisible_found_p; | |
4492 | ||
4493 | xassert (it != NULL && start_charpos <= end_charpos); | |
4494 | ||
4495 | /* Is text at START invisible? */ | |
4496 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4497 | it->window); | |
4498 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4499 | invisible_found_p = 1; | |
4500 | else | |
4501 | { | |
6c577098 GM |
4502 | limit = next_single_char_property_change (make_number (start_charpos), |
4503 | Qinvisible, Qnil, | |
4504 | make_number (end_charpos)); | |
5f5c8ee5 GM |
4505 | invisible_found_p = XFASTINT (limit) < end_charpos; |
4506 | } | |
4507 | ||
4508 | return invisible_found_p; | |
5f5c8ee5 GM |
4509 | } |
4510 | ||
4511 | ||
4512 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4513 | negative means move up. DVPOS == 0 means move to the start of the | |
4514 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4515 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4516 | ||
4517 | Further optimization ideas: If we would know that IT->f doesn't use | |
4518 | a face with proportional font, we could be faster for | |
4519 | truncate-lines nil. */ | |
4520 | ||
4521 | void | |
4522 | move_it_by_lines (it, dvpos, need_y_p) | |
4523 | struct it *it; | |
4524 | int dvpos, need_y_p; | |
4525 | { | |
4526 | struct position pos; | |
4527 | ||
4528 | if (!FRAME_WINDOW_P (it->f)) | |
4529 | { | |
4530 | struct text_pos textpos; | |
4531 | ||
4532 | /* We can use vmotion on frames without proportional fonts. */ | |
4533 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4534 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4535 | reseat (it, textpos, 1); | |
4536 | it->vpos += pos.vpos; | |
4537 | it->current_y += pos.vpos; | |
4538 | } | |
4539 | else if (dvpos == 0) | |
4540 | { | |
4541 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4542 | move_it_vertically_backward (it, 0); | |
4543 | xassert (it->current_x == 0 && it->hpos == 0); | |
4544 | } | |
4545 | else if (dvpos > 0) | |
4546 | { | |
4547 | /* If there are no continuation lines, and if there is no | |
4548 | selective display, try the simple method of moving forward | |
4549 | DVPOS newlines, then see where we are. */ | |
4550 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4551 | { | |
4552 | int shortage = 0, charpos; | |
4553 | ||
4554 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4555 | charpos = IT_CHARPOS (*it) + 1; | |
4556 | else | |
4557 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4558 | &shortage, 0); | |
4559 | ||
4560 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4561 | { | |
4562 | struct text_pos pos; | |
4563 | CHARPOS (pos) = charpos; | |
4564 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4565 | reseat (it, pos, 1); | |
4566 | it->vpos += dvpos - shortage; | |
4567 | it->hpos = it->current_x = 0; | |
4568 | return; | |
4569 | } | |
4570 | } | |
4571 | ||
4572 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4573 | } | |
4574 | else | |
4575 | { | |
4576 | struct it it2; | |
4577 | int start_charpos, i; | |
4578 | ||
4579 | /* If there are no continuation lines, and if there is no | |
4580 | selective display, try the simple method of moving backward | |
4581 | -DVPOS newlines. */ | |
4582 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4583 | { | |
4584 | int shortage; | |
4585 | int charpos = IT_CHARPOS (*it); | |
4586 | int bytepos = IT_BYTEPOS (*it); | |
4587 | ||
4588 | /* If in the middle of a line, go to its start. */ | |
4589 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4590 | { | |
4591 | charpos = find_next_newline_no_quit (charpos, -1); | |
4592 | bytepos = CHAR_TO_BYTE (charpos); | |
4593 | } | |
4594 | ||
4595 | if (charpos == BEGV) | |
4596 | { | |
4597 | struct text_pos pos; | |
4598 | CHARPOS (pos) = charpos; | |
4599 | BYTEPOS (pos) = bytepos; | |
4600 | reseat (it, pos, 1); | |
4601 | it->hpos = it->current_x = 0; | |
4602 | return; | |
4603 | } | |
4604 | else | |
4605 | { | |
4606 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4607 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4608 | { | |
4609 | struct text_pos pos; | |
4610 | CHARPOS (pos) = charpos; | |
4611 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4612 | reseat (it, pos, 1); | |
4613 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4614 | it->hpos = it->current_x = 0; | |
4615 | return; | |
4616 | } | |
4617 | } | |
4618 | } | |
4619 | ||
4620 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4621 | start_charpos = IT_CHARPOS (*it); | |
4622 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4623 | back_to_previous_visible_line_start (it); | |
4624 | reseat (it, it->current.pos, 1); | |
4625 | it->current_x = it->hpos = 0; | |
4626 | ||
4627 | /* Above call may have moved too far if continuation lines | |
4628 | are involved. Scan forward and see if it did. */ | |
4629 | it2 = *it; | |
4630 | it2.vpos = it2.current_y = 0; | |
4631 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4632 | it->vpos -= it2.vpos; | |
4633 | it->current_y -= it2.current_y; | |
4634 | it->current_x = it->hpos = 0; | |
4635 | ||
4636 | /* If we moved too far, move IT some lines forward. */ | |
4637 | if (it2.vpos > -dvpos) | |
4638 | { | |
4639 | int delta = it2.vpos + dvpos; | |
4640 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4641 | } | |
4642 | } | |
4643 | } | |
4644 | ||
4645 | ||
4646 | \f | |
4647 | /*********************************************************************** | |
4648 | Messages | |
4649 | ***********************************************************************/ | |
4650 | ||
4651 | ||
937248bc GM |
4652 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
4653 | to *Messages*. */ | |
4654 | ||
4655 | void | |
4656 | add_to_log (format, arg1, arg2) | |
4657 | char *format; | |
4658 | Lisp_Object arg1, arg2; | |
4659 | { | |
4660 | Lisp_Object args[3]; | |
4661 | Lisp_Object msg, fmt; | |
4662 | char *buffer; | |
4663 | int len; | |
4664 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4665 | ||
4666 | fmt = msg = Qnil; | |
4667 | GCPRO4 (fmt, msg, arg1, arg2); | |
4668 | ||
4669 | args[0] = fmt = build_string (format); | |
4670 | args[1] = arg1; | |
4671 | args[2] = arg2; | |
4672 | msg = Fformat (make_number (3), args); | |
4673 | ||
4674 | len = STRING_BYTES (XSTRING (msg)) + 1; | |
4675 | buffer = (char *) alloca (len); | |
4676 | strcpy (buffer, XSTRING (msg)->data); | |
4677 | ||
4678 | message_dolog (buffer, len, 1, 0); | |
4679 | UNGCPRO; | |
4680 | } | |
4681 | ||
4682 | ||
5f5c8ee5 GM |
4683 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
4684 | ||
4685 | void | |
4686 | message_log_maybe_newline () | |
4687 | { | |
4688 | if (message_log_need_newline) | |
4689 | message_dolog ("", 0, 1, 0); | |
4690 | } | |
4691 | ||
4692 | ||
4693 | /* Add a string M of length LEN to the message log, optionally | |
4694 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4695 | nonzero, means interpret the contents of M as multibyte. This | |
4696 | function calls low-level routines in order to bypass text property | |
4697 | hooks, etc. which might not be safe to run. */ | |
4698 | ||
4699 | void | |
4700 | message_dolog (m, len, nlflag, multibyte) | |
4701 | char *m; | |
4702 | int len, nlflag, multibyte; | |
4703 | { | |
4704 | if (!NILP (Vmessage_log_max)) | |
4705 | { | |
4706 | struct buffer *oldbuf; | |
4707 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4708 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4709 | int point_at_end = 0; | |
4710 | int zv_at_end = 0; | |
4711 | Lisp_Object old_deactivate_mark, tem; | |
4712 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4713 | ||
4714 | old_deactivate_mark = Vdeactivate_mark; | |
4715 | oldbuf = current_buffer; | |
4716 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); | |
4717 | current_buffer->undo_list = Qt; | |
4718 | ||
4719 | oldpoint = Fpoint_marker (); | |
4720 | oldbegv = Fpoint_min_marker (); | |
4721 | oldzv = Fpoint_max_marker (); | |
4722 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
4723 | ||
4724 | if (PT == Z) | |
4725 | point_at_end = 1; | |
4726 | if (ZV == Z) | |
4727 | zv_at_end = 1; | |
4728 | ||
4729 | BEGV = BEG; | |
4730 | BEGV_BYTE = BEG_BYTE; | |
4731 | ZV = Z; | |
4732 | ZV_BYTE = Z_BYTE; | |
4733 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4734 | ||
4735 | /* Insert the string--maybe converting multibyte to single byte | |
4736 | or vice versa, so that all the text fits the buffer. */ | |
4737 | if (multibyte | |
4738 | && NILP (current_buffer->enable_multibyte_characters)) | |
4739 | { | |
4740 | int i, c, nbytes; | |
4741 | unsigned char work[1]; | |
4742 | ||
4743 | /* Convert a multibyte string to single-byte | |
4744 | for the *Message* buffer. */ | |
4745 | for (i = 0; i < len; i += nbytes) | |
4746 | { | |
4fdb80f2 | 4747 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
4748 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
4749 | ? c | |
4750 | : multibyte_char_to_unibyte (c, Qnil)); | |
4751 | insert_1_both (work, 1, 1, 1, 0, 0); | |
4752 | } | |
4753 | } | |
4754 | else if (! multibyte | |
4755 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
4756 | { | |
4757 | int i, c, nbytes; | |
4758 | unsigned char *msg = (unsigned char *) m; | |
260a86a0 | 4759 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
4760 | /* Convert a single-byte string to multibyte |
4761 | for the *Message* buffer. */ | |
4762 | for (i = 0; i < len; i++) | |
4763 | { | |
4764 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
4765 | nbytes = CHAR_STRING (c, str); |
4766 | insert_1_both (str, 1, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
4767 | } |
4768 | } | |
4769 | else if (len) | |
4770 | insert_1 (m, len, 1, 0, 0); | |
4771 | ||
4772 | if (nlflag) | |
4773 | { | |
4774 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
4775 | insert_1 ("\n", 1, 1, 0, 0); | |
4776 | ||
4777 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
4778 | this_bol = PT; | |
4779 | this_bol_byte = PT_BYTE; | |
4780 | ||
4781 | if (this_bol > BEG) | |
4782 | { | |
4783 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
4784 | prev_bol = PT; | |
4785 | prev_bol_byte = PT_BYTE; | |
4786 | ||
4787 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
4788 | this_bol, this_bol_byte); | |
4789 | if (dup) | |
4790 | { | |
4791 | del_range_both (prev_bol, prev_bol_byte, | |
4792 | this_bol, this_bol_byte, 0); | |
4793 | if (dup > 1) | |
4794 | { | |
4795 | char dupstr[40]; | |
4796 | int duplen; | |
4797 | ||
4798 | /* If you change this format, don't forget to also | |
4799 | change message_log_check_duplicate. */ | |
4800 | sprintf (dupstr, " [%d times]", dup); | |
4801 | duplen = strlen (dupstr); | |
4802 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
4803 | insert_1 (dupstr, duplen, 1, 0, 1); | |
4804 | } | |
4805 | } | |
4806 | } | |
4807 | ||
4808 | if (NATNUMP (Vmessage_log_max)) | |
4809 | { | |
4810 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
4811 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
4812 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
4813 | } | |
4814 | } | |
4815 | BEGV = XMARKER (oldbegv)->charpos; | |
4816 | BEGV_BYTE = marker_byte_position (oldbegv); | |
4817 | ||
4818 | if (zv_at_end) | |
4819 | { | |
4820 | ZV = Z; | |
4821 | ZV_BYTE = Z_BYTE; | |
4822 | } | |
4823 | else | |
4824 | { | |
4825 | ZV = XMARKER (oldzv)->charpos; | |
4826 | ZV_BYTE = marker_byte_position (oldzv); | |
4827 | } | |
4828 | ||
4829 | if (point_at_end) | |
4830 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4831 | else | |
4832 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
4833 | Lisp code. */ | |
4834 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
4835 | XMARKER (oldpoint)->bytepos); | |
4836 | ||
4837 | UNGCPRO; | |
4838 | free_marker (oldpoint); | |
4839 | free_marker (oldbegv); | |
4840 | free_marker (oldzv); | |
4841 | ||
4842 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
4843 | set_buffer_internal (oldbuf); | |
4844 | if (NILP (tem)) | |
4845 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
4846 | message_log_need_newline = !nlflag; | |
4847 | Vdeactivate_mark = old_deactivate_mark; | |
4848 | } | |
4849 | } | |
4850 | ||
4851 | ||
4852 | /* We are at the end of the buffer after just having inserted a newline. | |
4853 | (Note: We depend on the fact we won't be crossing the gap.) | |
4854 | Check to see if the most recent message looks a lot like the previous one. | |
4855 | Return 0 if different, 1 if the new one should just replace it, or a | |
4856 | value N > 1 if we should also append " [N times]". */ | |
4857 | ||
4858 | static int | |
4859 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
4860 | int prev_bol, this_bol; | |
4861 | int prev_bol_byte, this_bol_byte; | |
4862 | { | |
4863 | int i; | |
4864 | int len = Z_BYTE - 1 - this_bol_byte; | |
4865 | int seen_dots = 0; | |
4866 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
4867 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
4868 | ||
4869 | for (i = 0; i < len; i++) | |
4870 | { | |
4871 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
4872 | && p1[i] != '\n') | |
4873 | seen_dots = 1; | |
4874 | if (p1[i] != p2[i]) | |
4875 | return seen_dots; | |
4876 | } | |
4877 | p1 += len; | |
4878 | if (*p1 == '\n') | |
4879 | return 2; | |
4880 | if (*p1++ == ' ' && *p1++ == '[') | |
4881 | { | |
4882 | int n = 0; | |
4883 | while (*p1 >= '0' && *p1 <= '9') | |
4884 | n = n * 10 + *p1++ - '0'; | |
4885 | if (strncmp (p1, " times]\n", 8) == 0) | |
4886 | return n+1; | |
4887 | } | |
4888 | return 0; | |
4889 | } | |
4890 | ||
4891 | ||
4892 | /* Display an echo area message M with a specified length of LEN | |
4893 | chars. The string may include null characters. If M is 0, clear | |
4894 | out any existing message, and let the mini-buffer text show through. | |
4895 | ||
4896 | The buffer M must continue to exist until after the echo area gets | |
4897 | cleared or some other message gets displayed there. This means do | |
4898 | not pass text that is stored in a Lisp string; do not pass text in | |
4899 | a buffer that was alloca'd. */ | |
4900 | ||
4901 | void | |
4902 | message2 (m, len, multibyte) | |
4903 | char *m; | |
4904 | int len; | |
4905 | int multibyte; | |
4906 | { | |
4907 | /* First flush out any partial line written with print. */ | |
4908 | message_log_maybe_newline (); | |
4909 | if (m) | |
4910 | message_dolog (m, len, 1, multibyte); | |
4911 | message2_nolog (m, len, multibyte); | |
4912 | } | |
4913 | ||
4914 | ||
4915 | /* The non-logging counterpart of message2. */ | |
4916 | ||
4917 | void | |
4918 | message2_nolog (m, len, multibyte) | |
4919 | char *m; | |
4920 | int len; | |
4921 | { | |
886bd6f2 | 4922 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
4923 | message_enable_multibyte = multibyte; |
4924 | ||
4925 | if (noninteractive) | |
4926 | { | |
4927 | if (noninteractive_need_newline) | |
4928 | putc ('\n', stderr); | |
4929 | noninteractive_need_newline = 0; | |
4930 | if (m) | |
4931 | fwrite (m, len, 1, stderr); | |
4932 | if (cursor_in_echo_area == 0) | |
4933 | fprintf (stderr, "\n"); | |
4934 | fflush (stderr); | |
4935 | } | |
4936 | /* A null message buffer means that the frame hasn't really been | |
4937 | initialized yet. Error messages get reported properly by | |
4938 | cmd_error, so this must be just an informative message; toss it. */ | |
4939 | else if (INTERACTIVE | |
886bd6f2 GM |
4940 | && sf->glyphs_initialized_p |
4941 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
4942 | { |
4943 | Lisp_Object mini_window; | |
4944 | struct frame *f; | |
4945 | ||
4946 | /* Get the frame containing the mini-buffer | |
4947 | that the selected frame is using. */ | |
886bd6f2 | 4948 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
4949 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
4950 | ||
4951 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 4952 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
4953 | && ! FRAME_VISIBLE_P (f)) |
4954 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4955 | ||
4956 | if (m) | |
4957 | { | |
c6e89d6c | 4958 | set_message (m, Qnil, len, multibyte); |
5f5c8ee5 GM |
4959 | if (minibuffer_auto_raise) |
4960 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4961 | } | |
4962 | else | |
c6e89d6c | 4963 | clear_message (1, 1); |
5f5c8ee5 | 4964 | |
c6e89d6c | 4965 | do_pending_window_change (0); |
5f5c8ee5 | 4966 | echo_area_display (1); |
c6e89d6c | 4967 | do_pending_window_change (0); |
5f5c8ee5 GM |
4968 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
4969 | (*frame_up_to_date_hook) (f); | |
4970 | } | |
4971 | } | |
4972 | ||
4973 | ||
c6e89d6c GM |
4974 | /* Display an echo area message M with a specified length of NBYTES |
4975 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
4976 | string, clear out any existing message, and let the mini-buffer |
4977 | text show through. */ | |
4978 | ||
4979 | void | |
c6e89d6c | 4980 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 4981 | Lisp_Object m; |
c6e89d6c | 4982 | int nbytes; |
5f5c8ee5 GM |
4983 | int multibyte; |
4984 | { | |
4985 | struct gcpro gcpro1; | |
4986 | ||
4987 | GCPRO1 (m); | |
4988 | ||
4989 | /* First flush out any partial line written with print. */ | |
4990 | message_log_maybe_newline (); | |
4991 | if (STRINGP (m)) | |
c6e89d6c GM |
4992 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
4993 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
4994 | |
4995 | UNGCPRO; | |
4996 | } | |
4997 | ||
4998 | ||
4999 | /* The non-logging version of message3. */ | |
5000 | ||
5001 | void | |
c6e89d6c | 5002 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5003 | Lisp_Object m; |
c6e89d6c | 5004 | int nbytes, multibyte; |
5f5c8ee5 | 5005 | { |
886bd6f2 | 5006 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5007 | message_enable_multibyte = multibyte; |
5008 | ||
5009 | if (noninteractive) | |
5010 | { | |
5011 | if (noninteractive_need_newline) | |
5012 | putc ('\n', stderr); | |
5013 | noninteractive_need_newline = 0; | |
5014 | if (STRINGP (m)) | |
c6e89d6c | 5015 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
5016 | if (cursor_in_echo_area == 0) |
5017 | fprintf (stderr, "\n"); | |
5018 | fflush (stderr); | |
5019 | } | |
5020 | /* A null message buffer means that the frame hasn't really been | |
5021 | initialized yet. Error messages get reported properly by | |
5022 | cmd_error, so this must be just an informative message; toss it. */ | |
5023 | else if (INTERACTIVE | |
886bd6f2 GM |
5024 | && sf->glyphs_initialized_p |
5025 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5026 | { |
5027 | Lisp_Object mini_window; | |
c6e89d6c | 5028 | Lisp_Object frame; |
5f5c8ee5 GM |
5029 | struct frame *f; |
5030 | ||
5031 | /* Get the frame containing the mini-buffer | |
5032 | that the selected frame is using. */ | |
886bd6f2 | 5033 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5034 | frame = XWINDOW (mini_window)->frame; |
5035 | f = XFRAME (frame); | |
5f5c8ee5 GM |
5036 | |
5037 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5038 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
5039 | && !FRAME_VISIBLE_P (f)) |
5040 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 5041 | |
c6e89d6c | 5042 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 5043 | { |
c6e89d6c | 5044 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
5045 | if (minibuffer_auto_raise) |
5046 | Fraise_frame (frame); | |
5f5c8ee5 GM |
5047 | } |
5048 | else | |
c6e89d6c | 5049 | clear_message (1, 1); |
5f5c8ee5 | 5050 | |
c6e89d6c | 5051 | do_pending_window_change (0); |
5f5c8ee5 | 5052 | echo_area_display (1); |
c6e89d6c | 5053 | do_pending_window_change (0); |
5f5c8ee5 GM |
5054 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5055 | (*frame_up_to_date_hook) (f); | |
5056 | } | |
5057 | } | |
5058 | ||
5059 | ||
5060 | /* Display a null-terminated echo area message M. If M is 0, clear | |
5061 | out any existing message, and let the mini-buffer text show through. | |
5062 | ||
5063 | The buffer M must continue to exist until after the echo area gets | |
5064 | cleared or some other message gets displayed there. Do not pass | |
5065 | text that is stored in a Lisp string. Do not pass text in a buffer | |
5066 | that was alloca'd. */ | |
5067 | ||
5068 | void | |
5069 | message1 (m) | |
5070 | char *m; | |
5071 | { | |
5072 | message2 (m, (m ? strlen (m) : 0), 0); | |
5073 | } | |
5074 | ||
5075 | ||
5076 | /* The non-logging counterpart of message1. */ | |
5077 | ||
5078 | void | |
5079 | message1_nolog (m) | |
5080 | char *m; | |
5081 | { | |
5082 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5083 | } | |
5084 | ||
5085 | /* Display a message M which contains a single %s | |
5086 | which gets replaced with STRING. */ | |
5087 | ||
5088 | void | |
5089 | message_with_string (m, string, log) | |
5090 | char *m; | |
5091 | Lisp_Object string; | |
5092 | int log; | |
5093 | { | |
5094 | if (noninteractive) | |
5095 | { | |
5096 | if (m) | |
5097 | { | |
5098 | if (noninteractive_need_newline) | |
5099 | putc ('\n', stderr); | |
5100 | noninteractive_need_newline = 0; | |
5101 | fprintf (stderr, m, XSTRING (string)->data); | |
5102 | if (cursor_in_echo_area == 0) | |
5103 | fprintf (stderr, "\n"); | |
5104 | fflush (stderr); | |
5105 | } | |
5106 | } | |
5107 | else if (INTERACTIVE) | |
5108 | { | |
5109 | /* The frame whose minibuffer we're going to display the message on. | |
5110 | It may be larger than the selected frame, so we need | |
5111 | to use its buffer, not the selected frame's buffer. */ | |
5112 | Lisp_Object mini_window; | |
886bd6f2 | 5113 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5114 | |
5115 | /* Get the frame containing the minibuffer | |
5116 | that the selected frame is using. */ | |
886bd6f2 | 5117 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5118 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5119 | ||
5120 | /* A null message buffer means that the frame hasn't really been | |
5121 | initialized yet. Error messages get reported properly by | |
5122 | cmd_error, so this must be just an informative message; toss it. */ | |
5123 | if (FRAME_MESSAGE_BUF (f)) | |
5124 | { | |
5125 | int len; | |
5126 | char *a[1]; | |
5127 | a[0] = (char *) XSTRING (string)->data; | |
5128 | ||
5129 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5130 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5131 | ||
5132 | if (log) | |
5133 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5134 | STRING_MULTIBYTE (string)); | |
5135 | else | |
5136 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5137 | STRING_MULTIBYTE (string)); | |
5138 | ||
5139 | /* Print should start at the beginning of the message | |
5140 | buffer next time. */ | |
5141 | message_buf_print = 0; | |
5142 | } | |
5143 | } | |
5144 | } | |
5145 | ||
5146 | ||
5f5c8ee5 GM |
5147 | /* Dump an informative message to the minibuf. If M is 0, clear out |
5148 | any existing message, and let the mini-buffer text show through. */ | |
5149 | ||
5150 | /* VARARGS 1 */ | |
5151 | void | |
5152 | message (m, a1, a2, a3) | |
5153 | char *m; | |
5154 | EMACS_INT a1, a2, a3; | |
5155 | { | |
5156 | if (noninteractive) | |
5157 | { | |
5158 | if (m) | |
5159 | { | |
5160 | if (noninteractive_need_newline) | |
5161 | putc ('\n', stderr); | |
5162 | noninteractive_need_newline = 0; | |
5163 | fprintf (stderr, m, a1, a2, a3); | |
5164 | if (cursor_in_echo_area == 0) | |
5165 | fprintf (stderr, "\n"); | |
5166 | fflush (stderr); | |
5167 | } | |
5168 | } | |
5169 | else if (INTERACTIVE) | |
5170 | { | |
5171 | /* The frame whose mini-buffer we're going to display the message | |
5172 | on. It may be larger than the selected frame, so we need to | |
5173 | use its buffer, not the selected frame's buffer. */ | |
5174 | Lisp_Object mini_window; | |
886bd6f2 | 5175 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5176 | |
5177 | /* Get the frame containing the mini-buffer | |
5178 | that the selected frame is using. */ | |
886bd6f2 | 5179 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5180 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5181 | ||
5182 | /* A null message buffer means that the frame hasn't really been | |
5183 | initialized yet. Error messages get reported properly by | |
5184 | cmd_error, so this must be just an informative message; toss | |
5185 | it. */ | |
5186 | if (FRAME_MESSAGE_BUF (f)) | |
5187 | { | |
5188 | if (m) | |
5189 | { | |
5190 | int len; | |
5191 | #ifdef NO_ARG_ARRAY | |
5192 | char *a[3]; | |
5193 | a[0] = (char *) a1; | |
5194 | a[1] = (char *) a2; | |
5195 | a[2] = (char *) a3; | |
5196 | ||
5197 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5198 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5199 | #else | |
5200 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5201 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5202 | (char **) &a1); | |
5203 | #endif /* NO_ARG_ARRAY */ | |
5204 | ||
5205 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5206 | } | |
5207 | else | |
5208 | message1 (0); | |
5209 | ||
5210 | /* Print should start at the beginning of the message | |
5211 | buffer next time. */ | |
5212 | message_buf_print = 0; | |
5213 | } | |
5214 | } | |
5215 | } | |
5216 | ||
5217 | ||
5218 | /* The non-logging version of message. */ | |
5219 | ||
5220 | void | |
5221 | message_nolog (m, a1, a2, a3) | |
5222 | char *m; | |
5223 | EMACS_INT a1, a2, a3; | |
5224 | { | |
5225 | Lisp_Object old_log_max; | |
5226 | old_log_max = Vmessage_log_max; | |
5227 | Vmessage_log_max = Qnil; | |
5228 | message (m, a1, a2, a3); | |
5229 | Vmessage_log_max = old_log_max; | |
5230 | } | |
5231 | ||
5232 | ||
c6e89d6c GM |
5233 | /* Display the current message in the current mini-buffer. This is |
5234 | only called from error handlers in process.c, and is not time | |
5235 | critical. */ | |
5f5c8ee5 GM |
5236 | |
5237 | void | |
5238 | update_echo_area () | |
5239 | { | |
c6e89d6c GM |
5240 | if (!NILP (echo_area_buffer[0])) |
5241 | { | |
5242 | Lisp_Object string; | |
5243 | string = Fcurrent_message (); | |
5244 | message3 (string, XSTRING (string)->size, | |
5245 | !NILP (current_buffer->enable_multibyte_characters)); | |
5246 | } | |
5247 | } | |
5248 | ||
5249 | ||
5bcfeb49 GM |
5250 | /* Make sure echo area buffers in echo_buffers[] are life. If they |
5251 | aren't, make new ones. */ | |
5252 | ||
5253 | static void | |
5254 | ensure_echo_area_buffers () | |
5255 | { | |
5256 | int i; | |
5257 | ||
5258 | for (i = 0; i < 2; ++i) | |
5259 | if (!BUFFERP (echo_buffer[i]) | |
5260 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
5261 | { | |
5262 | char name[30]; | |
5263 | sprintf (name, " *Echo Area %d*", i); | |
5264 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
5265 | } | |
5266 | } | |
5267 | ||
5268 | ||
c6e89d6c GM |
5269 | /* Call FN with args A1..A5 with either the current or last displayed |
5270 | echo_area_buffer as current buffer. | |
5271 | ||
5272 | WHICH zero means use the current message buffer | |
5273 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
5274 | from echo_buffer[] and clear it. | |
5275 | ||
5276 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
5277 | suitable buffer from echo_buffer[] and clear it. | |
5278 | ||
5279 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
5280 | that the current message becomes the last displayed one, make | |
5281 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
5282 | ||
5283 | Value is what FN returns. */ | |
5284 | ||
5285 | static int | |
5286 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4, a5) | |
5287 | struct window *w; | |
5288 | int which; | |
5289 | int (*fn) (); | |
5290 | int a1, a2, a3, a4, a5; | |
5291 | { | |
5292 | Lisp_Object buffer; | |
15e26c76 | 5293 | int this_one, the_other, clear_buffer_p, rc; |
c6e89d6c GM |
5294 | int count = specpdl_ptr - specpdl; |
5295 | ||
5296 | /* If buffers aren't life, make new ones. */ | |
5bcfeb49 | 5297 | ensure_echo_area_buffers (); |
c6e89d6c GM |
5298 | |
5299 | clear_buffer_p = 0; | |
5300 | ||
5301 | if (which == 0) | |
5302 | this_one = 0, the_other = 1; | |
5303 | else if (which > 0) | |
5304 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 5305 | else |
c6e89d6c GM |
5306 | { |
5307 | this_one = 0, the_other = 1; | |
5308 | clear_buffer_p = 1; | |
5309 | ||
5310 | /* We need a fresh one in case the current echo buffer equals | |
5311 | the one containing the last displayed echo area message. */ | |
5312 | if (!NILP (echo_area_buffer[this_one]) | |
5313 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
5314 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
5315 | } |
5316 | ||
5317 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
5318 | have one. */ | |
5319 | if (NILP (echo_area_buffer[this_one])) | |
5320 | { | |
5321 | echo_area_buffer[this_one] | |
5322 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
5323 | ? echo_buffer[the_other] | |
5324 | : echo_buffer[this_one]); | |
5325 | clear_buffer_p = 1; | |
5326 | } | |
5327 | ||
5328 | buffer = echo_area_buffer[this_one]; | |
5329 | ||
5330 | record_unwind_protect (unwind_with_echo_area_buffer, | |
5331 | with_echo_area_buffer_unwind_data (w)); | |
5332 | ||
5333 | /* Make the echo area buffer current. Note that for display | |
5334 | purposes, it is not necessary that the displayed window's buffer | |
5335 | == current_buffer, except for text property lookup. So, let's | |
5336 | only set that buffer temporarily here without doing a full | |
5337 | Fset_window_buffer. We must also change w->pointm, though, | |
5338 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
5339 | aborts. */ | |
9142dd5b | 5340 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
5341 | if (w) |
5342 | { | |
5343 | w->buffer = buffer; | |
5344 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
5345 | } | |
5346 | current_buffer->truncate_lines = Qnil; | |
5347 | current_buffer->undo_list = Qt; | |
5348 | current_buffer->read_only = Qnil; | |
5349 | ||
5350 | if (clear_buffer_p && Z > BEG) | |
5351 | del_range (BEG, Z); | |
5352 | ||
5353 | xassert (BEGV >= BEG); | |
5354 | xassert (ZV <= Z && ZV >= BEGV); | |
5355 | ||
5356 | rc = fn (a1, a2, a3, a4, a5); | |
5357 | ||
5358 | xassert (BEGV >= BEG); | |
5359 | xassert (ZV <= Z && ZV >= BEGV); | |
5360 | ||
5361 | unbind_to (count, Qnil); | |
5362 | return rc; | |
5f5c8ee5 GM |
5363 | } |
5364 | ||
5365 | ||
c6e89d6c GM |
5366 | /* Save state that should be preserved around the call to the function |
5367 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 5368 | |
c6e89d6c GM |
5369 | static Lisp_Object |
5370 | with_echo_area_buffer_unwind_data (w) | |
5371 | struct window *w; | |
5f5c8ee5 | 5372 | { |
c6e89d6c GM |
5373 | int i = 0; |
5374 | Lisp_Object vector; | |
5f5c8ee5 | 5375 | |
c6e89d6c GM |
5376 | /* Reduce consing by keeping one vector in |
5377 | Vwith_echo_area_save_vector. */ | |
5378 | vector = Vwith_echo_area_save_vector; | |
5379 | Vwith_echo_area_save_vector = Qnil; | |
5380 | ||
5381 | if (NILP (vector)) | |
9142dd5b | 5382 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c GM |
5383 | |
5384 | XSETBUFFER (XVECTOR (vector)->contents[i], current_buffer); ++i; | |
5385 | XVECTOR (vector)->contents[i++] = Vdeactivate_mark; | |
5386 | XVECTOR (vector)->contents[i++] = make_number (windows_or_buffers_changed); | |
c6e89d6c GM |
5387 | |
5388 | if (w) | |
5389 | { | |
5390 | XSETWINDOW (XVECTOR (vector)->contents[i], w); ++i; | |
5391 | XVECTOR (vector)->contents[i++] = w->buffer; | |
5392 | XVECTOR (vector)->contents[i++] | |
5393 | = make_number (XMARKER (w->pointm)->charpos); | |
5394 | XVECTOR (vector)->contents[i++] | |
5395 | = make_number (XMARKER (w->pointm)->bytepos); | |
5396 | } | |
5397 | else | |
5398 | { | |
5399 | int end = i + 4; | |
5400 | while (i < end) | |
5401 | XVECTOR (vector)->contents[i++] = Qnil; | |
5402 | } | |
5f5c8ee5 | 5403 | |
c6e89d6c GM |
5404 | xassert (i == XVECTOR (vector)->size); |
5405 | return vector; | |
5406 | } | |
5f5c8ee5 | 5407 | |
5f5c8ee5 | 5408 | |
c6e89d6c GM |
5409 | /* Restore global state from VECTOR which was created by |
5410 | with_echo_area_buffer_unwind_data. */ | |
5411 | ||
5412 | static Lisp_Object | |
5413 | unwind_with_echo_area_buffer (vector) | |
5414 | Lisp_Object vector; | |
5415 | { | |
5416 | int i = 0; | |
5417 | ||
9142dd5b | 5418 | set_buffer_internal_1 (XBUFFER (XVECTOR (vector)->contents[i])); ++i; |
c6e89d6c GM |
5419 | Vdeactivate_mark = XVECTOR (vector)->contents[i]; ++i; |
5420 | windows_or_buffers_changed = XFASTINT (XVECTOR (vector)->contents[i]); ++i; | |
c6e89d6c GM |
5421 | |
5422 | if (WINDOWP (XVECTOR (vector)->contents[i])) | |
5423 | { | |
5424 | struct window *w; | |
5425 | Lisp_Object buffer, charpos, bytepos; | |
5426 | ||
5427 | w = XWINDOW (XVECTOR (vector)->contents[i]); ++i; | |
5428 | buffer = XVECTOR (vector)->contents[i]; ++i; | |
5429 | charpos = XVECTOR (vector)->contents[i]; ++i; | |
5430 | bytepos = XVECTOR (vector)->contents[i]; ++i; | |
5431 | ||
5432 | w->buffer = buffer; | |
5433 | set_marker_both (w->pointm, buffer, | |
5434 | XFASTINT (charpos), XFASTINT (bytepos)); | |
5435 | } | |
5436 | ||
5437 | Vwith_echo_area_save_vector = vector; | |
5438 | return Qnil; | |
5439 | } | |
5440 | ||
5441 | ||
5442 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
5443 | non-zero means we will print multibyte. */ | |
5444 | ||
5445 | void | |
5446 | setup_echo_area_for_printing (multibyte_p) | |
5447 | int multibyte_p; | |
5448 | { | |
5bcfeb49 GM |
5449 | ensure_echo_area_buffers (); |
5450 | ||
c6e89d6c GM |
5451 | if (!message_buf_print) |
5452 | { | |
5453 | /* A message has been output since the last time we printed. | |
5454 | Choose a fresh echo area buffer. */ | |
5455 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
5456 | echo_area_buffer[0] = echo_buffer[1]; | |
5457 | else | |
5458 | echo_area_buffer[0] = echo_buffer[0]; | |
5459 | ||
5460 | /* Switch to that buffer and clear it. */ | |
5461 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5462 | if (Z > BEG) | |
5463 | del_range (BEG, Z); | |
5464 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5465 | ||
5466 | /* Set up the buffer for the multibyteness we need. */ | |
5467 | if (multibyte_p | |
5468 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5469 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
5470 | ||
5471 | /* Raise the frame containing the echo area. */ | |
5472 | if (minibuffer_auto_raise) | |
5473 | { | |
886bd6f2 | 5474 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5475 | Lisp_Object mini_window; |
886bd6f2 | 5476 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5477 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
5478 | } | |
5479 | ||
5480 | message_buf_print = 1; | |
5481 | } | |
5482 | else if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
5483 | /* Someone switched buffers between print requests. */ | |
5484 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5485 | } | |
5486 | ||
5487 | ||
dd2eb166 GM |
5488 | /* Display an echo area message in window W. Value is non-zero if W's |
5489 | height is changed. If display_last_displayed_message_p is | |
5490 | non-zero, display the message that was last displayed, otherwise | |
5491 | display the current message. */ | |
c6e89d6c GM |
5492 | |
5493 | static int | |
5494 | display_echo_area (w) | |
5495 | struct window *w; | |
5496 | { | |
25edb08f GM |
5497 | int i, no_message_p, window_height_changed_p, count; |
5498 | ||
5499 | /* Temporarily disable garbage collections while displaying the echo | |
5500 | area. This is done because a GC can print a message itself. | |
5501 | That message would modify the echo area buffer's contents while a | |
5502 | redisplay of the buffer is going on, and seriously confuse | |
5503 | redisplay. */ | |
5504 | count = inhibit_garbage_collection (); | |
dd2eb166 GM |
5505 | |
5506 | /* If there is no message, we must call display_echo_area_1 | |
5507 | nevertheless because it resizes the window. But we will have to | |
5508 | reset the echo_area_buffer in question to nil at the end because | |
5509 | with_echo_area_buffer will sets it to an empty buffer. */ | |
5510 | i = display_last_displayed_message_p ? 1 : 0; | |
5511 | no_message_p = NILP (echo_area_buffer[i]); | |
5512 | ||
5513 | window_height_changed_p | |
5514 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
5515 | (int (*) ()) display_echo_area_1, w); | |
5516 | ||
5517 | if (no_message_p) | |
5518 | echo_area_buffer[i] = Qnil; | |
25edb08f GM |
5519 | |
5520 | unbind_to (count, Qnil); | |
dd2eb166 | 5521 | return window_height_changed_p; |
c6e89d6c GM |
5522 | } |
5523 | ||
5524 | ||
5525 | /* Helper for display_echo_area. Display the current buffer which | |
5526 | contains the current echo area message in window W, a mini-window. | |
5527 | Change the height of W so that all of the message is displayed. | |
5528 | Value is non-zero if height of W was changed. */ | |
5529 | ||
5530 | static int | |
5531 | display_echo_area_1 (w) | |
5532 | struct window *w; | |
5533 | { | |
5534 | Lisp_Object window; | |
c6e89d6c GM |
5535 | struct text_pos start; |
5536 | int window_height_changed_p = 0; | |
5537 | ||
5538 | /* Do this before displaying, so that we have a large enough glyph | |
5539 | matrix for the display. */ | |
92a90e89 | 5540 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
5541 | |
5542 | /* Display. */ | |
5543 | clear_glyph_matrix (w->desired_matrix); | |
5544 | XSETWINDOW (window, w); | |
5545 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
5546 | try_window (window, start); | |
5547 | ||
c6e89d6c GM |
5548 | return window_height_changed_p; |
5549 | } | |
5550 | ||
5551 | ||
92a90e89 GM |
5552 | /* Resize the echo area window to exactly the size needed for the |
5553 | currently displayed message, if there is one. */ | |
5554 | ||
5555 | void | |
5556 | resize_echo_area_axactly () | |
5557 | { | |
5558 | if (BUFFERP (echo_area_buffer[0]) | |
5559 | && WINDOWP (echo_area_window)) | |
5560 | { | |
5561 | struct window *w = XWINDOW (echo_area_window); | |
5562 | int resized_p; | |
5563 | ||
5564 | resized_p = with_echo_area_buffer (w, 0, | |
5565 | (int (*) ()) resize_mini_window, | |
5566 | w, 1); | |
5567 | if (resized_p) | |
5568 | { | |
5569 | ++windows_or_buffers_changed; | |
5570 | ++update_mode_lines; | |
5571 | redisplay_internal (0); | |
5572 | } | |
5573 | } | |
5574 | } | |
5575 | ||
5576 | ||
5577 | /* Resize mini-window W to fit the size of its contents. EXACT:P | |
5578 | means size the window exactly to the size needed. Otherwise, it's | |
5579 | only enlarged until W's buffer is empty. Value is non-zero if | |
5580 | the window height has been changed. */ | |
c6e89d6c | 5581 | |
9472f927 | 5582 | int |
92a90e89 | 5583 | resize_mini_window (w, exact_p) |
c6e89d6c | 5584 | struct window *w; |
92a90e89 | 5585 | int exact_p; |
c6e89d6c GM |
5586 | { |
5587 | struct frame *f = XFRAME (w->frame); | |
5588 | int window_height_changed_p = 0; | |
5589 | ||
5590 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f GM |
5591 | |
5592 | /* Nil means don't try to resize. */ | |
00f6d59e GM |
5593 | if (NILP (Vmax_mini_window_height) |
5594 | || (FRAME_X_P (f) && f->output_data.x == NULL)) | |
97cafc0f | 5595 | return 0; |
c6e89d6c GM |
5596 | |
5597 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
5598 | { | |
5599 | struct it it; | |
dd2eb166 GM |
5600 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
5601 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
5602 | int height, max_height; | |
5603 | int unit = CANON_Y_UNIT (f); | |
5604 | struct text_pos start; | |
9142dd5b | 5605 | |
c6e89d6c | 5606 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 5607 | |
dd2eb166 GM |
5608 | /* Compute the max. number of lines specified by the user. */ |
5609 | if (FLOATP (Vmax_mini_window_height)) | |
5610 | max_height = XFLOATINT (Vmax_mini_window_height) * total_height; | |
5611 | else if (INTEGERP (Vmax_mini_window_height)) | |
5612 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
5613 | else |
5614 | max_height = total_height / 4; | |
dd2eb166 GM |
5615 | |
5616 | /* Correct that max. height if it's bogus. */ | |
5617 | max_height = max (1, max_height); | |
5618 | max_height = min (total_height, max_height); | |
5619 | ||
5620 | /* Find out the height of the text in the window. */ | |
55b064bd | 5621 | last_height = 0; |
dd2eb166 | 5622 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); |
55b064bd GM |
5623 | if (it.max_ascent == 0 && it.max_descent == 0) |
5624 | height = it.current_y + last_height; | |
5625 | else | |
5626 | height = it.current_y + it.max_ascent + it.max_descent; | |
5627 | height = (height + unit - 1) / unit; | |
dd2eb166 GM |
5628 | |
5629 | /* Compute a suitable window start. */ | |
5630 | if (height > max_height) | |
5631 | { | |
5632 | height = max_height; | |
5633 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
5634 | move_it_vertically_backward (&it, (height - 1) * unit); | |
5635 | start = it.current.pos; | |
5636 | } | |
5637 | else | |
5638 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
5639 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 5640 | |
9472f927 GM |
5641 | /* Let it grow only, until we display an empty message, in which |
5642 | case the window shrinks again. */ | |
da448723 | 5643 | if (height > XFASTINT (w->height)) |
dd2eb166 | 5644 | { |
d2c48e86 | 5645 | int old_height = XFASTINT (w->height); |
da448723 GM |
5646 | freeze_window_starts (f, 1); |
5647 | grow_mini_window (w, height - XFASTINT (w->height)); | |
5648 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
5649 | } | |
5650 | else if (height < XFASTINT (w->height) | |
5651 | && (exact_p || BEGV == ZV)) | |
5652 | { | |
5653 | int old_height = XFASTINT (w->height); | |
5654 | freeze_window_starts (f, 0); | |
5655 | shrink_mini_window (w); | |
d2c48e86 | 5656 | window_height_changed_p = XFASTINT (w->height) != old_height; |
9142dd5b | 5657 | } |
c6e89d6c GM |
5658 | } |
5659 | ||
5660 | return window_height_changed_p; | |
5661 | } | |
5662 | ||
5663 | ||
5664 | /* Value is the current message, a string, or nil if there is no | |
5665 | current message. */ | |
5666 | ||
5667 | Lisp_Object | |
5668 | current_message () | |
5669 | { | |
5670 | Lisp_Object msg; | |
5671 | ||
5672 | if (NILP (echo_area_buffer[0])) | |
5673 | msg = Qnil; | |
5674 | else | |
5675 | { | |
5676 | with_echo_area_buffer (0, 0, (int (*) ()) current_message_1, &msg); | |
5677 | if (NILP (msg)) | |
5678 | echo_area_buffer[0] = Qnil; | |
5679 | } | |
5680 | ||
5681 | return msg; | |
5682 | } | |
5683 | ||
5684 | ||
5685 | static int | |
5686 | current_message_1 (msg) | |
5687 | Lisp_Object *msg; | |
5688 | { | |
5689 | if (Z > BEG) | |
5690 | *msg = make_buffer_string (BEG, Z, 1); | |
5691 | else | |
5692 | *msg = Qnil; | |
5693 | return 0; | |
5694 | } | |
5695 | ||
5696 | ||
5697 | /* Push the current message on Vmessage_stack for later restauration | |
5698 | by restore_message. Value is non-zero if the current message isn't | |
5699 | empty. This is a relatively infrequent operation, so it's not | |
5700 | worth optimizing. */ | |
5701 | ||
5702 | int | |
5703 | push_message () | |
5704 | { | |
5705 | Lisp_Object msg; | |
5706 | msg = current_message (); | |
5707 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
5708 | return STRINGP (msg); | |
5709 | } | |
5710 | ||
5711 | ||
5712 | /* Restore message display from the top of Vmessage_stack. */ | |
5713 | ||
5714 | void | |
5715 | restore_message () | |
5716 | { | |
5717 | Lisp_Object msg; | |
5718 | ||
5719 | xassert (CONSP (Vmessage_stack)); | |
5720 | msg = XCAR (Vmessage_stack); | |
5721 | if (STRINGP (msg)) | |
5722 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
5723 | else | |
5724 | message3_nolog (msg, 0, 0); | |
5725 | } | |
5726 | ||
5727 | ||
5728 | /* Pop the top-most entry off Vmessage_stack. */ | |
5729 | ||
5730 | void | |
5731 | pop_message () | |
5732 | { | |
5733 | xassert (CONSP (Vmessage_stack)); | |
5734 | Vmessage_stack = XCDR (Vmessage_stack); | |
5735 | } | |
5736 | ||
5737 | ||
5738 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
5739 | exits. If the stack is not empty, we have a missing pop_message | |
5740 | somewhere. */ | |
5741 | ||
5742 | void | |
5743 | check_message_stack () | |
5744 | { | |
5745 | if (!NILP (Vmessage_stack)) | |
5746 | abort (); | |
5747 | } | |
5748 | ||
5749 | ||
5750 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
5751 | time we display it---but don't redisplay it now. */ | |
5752 | ||
5753 | void | |
5754 | truncate_echo_area (nchars) | |
5755 | int nchars; | |
5756 | { | |
5757 | if (nchars == 0) | |
5758 | echo_area_buffer[0] = Qnil; | |
5759 | /* A null message buffer means that the frame hasn't really been | |
5760 | initialized yet. Error messages get reported properly by | |
5761 | cmd_error, so this must be just an informative message; toss it. */ | |
5762 | else if (!noninteractive | |
5763 | && INTERACTIVE | |
c6e89d6c | 5764 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
5765 | { |
5766 | struct frame *sf = SELECTED_FRAME (); | |
5767 | if (FRAME_MESSAGE_BUF (sf)) | |
5768 | with_echo_area_buffer (0, 0, (int (*) ()) truncate_message_1, nchars); | |
5769 | } | |
c6e89d6c GM |
5770 | } |
5771 | ||
5772 | ||
5773 | /* Helper function for truncate_echo_area. Truncate the current | |
5774 | message to at most NCHARS characters. */ | |
5775 | ||
5776 | static int | |
5777 | truncate_message_1 (nchars) | |
5778 | int nchars; | |
5779 | { | |
5780 | if (BEG + nchars < Z) | |
5781 | del_range (BEG + nchars, Z); | |
5782 | if (Z == BEG) | |
5783 | echo_area_buffer[0] = Qnil; | |
5784 | return 0; | |
5785 | } | |
5786 | ||
5787 | ||
5788 | /* Set the current message to a substring of S or STRING. | |
5789 | ||
5790 | If STRING is a Lisp string, set the message to the first NBYTES | |
5791 | bytes from STRING. NBYTES zero means use the whole string. If | |
5792 | STRING is multibyte, the message will be displayed multibyte. | |
5793 | ||
5794 | If S is not null, set the message to the first LEN bytes of S. LEN | |
5795 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
5796 | multibyte. Display the message multibyte in that case. */ | |
5797 | ||
5798 | void | |
5799 | set_message (s, string, nbytes, multibyte_p) | |
5800 | char *s; | |
5801 | Lisp_Object string; | |
5802 | int nbytes; | |
5803 | { | |
5804 | message_enable_multibyte | |
5805 | = ((s && multibyte_p) | |
5806 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
5807 | ||
5808 | with_echo_area_buffer (0, -1, (int (*) ()) set_message_1, | |
5809 | s, string, nbytes, multibyte_p); | |
5810 | message_buf_print = 0; | |
5811 | } | |
5812 | ||
5813 | ||
5814 | /* Helper function for set_message. Arguments have the same meaning | |
5815 | as there. This function is called with the echo area buffer being | |
5816 | current. */ | |
5817 | ||
5818 | static int | |
5819 | set_message_1 (s, string, nbytes, multibyte_p) | |
5820 | char *s; | |
5821 | Lisp_Object string; | |
5822 | int nbytes, multibyte_p; | |
5823 | { | |
5824 | xassert (BEG == Z); | |
5825 | ||
5826 | /* Change multibyteness of the echo buffer appropriately. */ | |
5827 | if (message_enable_multibyte | |
5828 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5829 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
5830 | ||
5831 | /* Insert new message at BEG. */ | |
5832 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5833 | ||
5834 | if (STRINGP (string)) | |
5835 | { | |
5836 | int nchars; | |
5837 | ||
5838 | if (nbytes == 0) | |
5839 | nbytes = XSTRING (string)->size_byte; | |
5840 | nchars = string_byte_to_char (string, nbytes); | |
5841 | ||
5842 | /* This function takes care of single/multibyte conversion. We | |
5843 | just have to ensure that the echo area buffer has the right | |
5844 | setting of enable_multibyte_characters. */ | |
5845 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
5846 | } | |
5847 | else if (s) | |
5848 | { | |
5849 | if (nbytes == 0) | |
5850 | nbytes = strlen (s); | |
5851 | ||
5852 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
5853 | { | |
5854 | /* Convert from multi-byte to single-byte. */ | |
5855 | int i, c, n; | |
5856 | unsigned char work[1]; | |
5857 | ||
5858 | /* Convert a multibyte string to single-byte. */ | |
5859 | for (i = 0; i < nbytes; i += n) | |
5860 | { | |
5861 | c = string_char_and_length (s + i, nbytes - i, &n); | |
5862 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
5863 | ? c | |
5864 | : multibyte_char_to_unibyte (c, Qnil)); | |
5865 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5866 | } | |
5867 | } | |
5868 | else if (!multibyte_p | |
5869 | && !NILP (current_buffer->enable_multibyte_characters)) | |
5870 | { | |
5871 | /* Convert from single-byte to multi-byte. */ | |
5872 | int i, c, n; | |
5873 | unsigned char *msg = (unsigned char *) s; | |
260a86a0 | 5874 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c6e89d6c GM |
5875 | |
5876 | /* Convert a single-byte string to multibyte. */ | |
5877 | for (i = 0; i < nbytes; i++) | |
5878 | { | |
5879 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
5880 | n = CHAR_STRING (c, str); |
5881 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
5882 | } |
5883 | } | |
5884 | else | |
5885 | insert_1 (s, nbytes, 1, 0, 0); | |
5886 | } | |
5887 | ||
5888 | return 0; | |
5889 | } | |
5890 | ||
5891 | ||
5892 | /* Clear messages. CURRENT_P non-zero means clear the current | |
5893 | message. LAST_DISPLAYED_P non-zero means clear the message | |
5894 | last displayed. */ | |
5895 | ||
5896 | void | |
5897 | clear_message (current_p, last_displayed_p) | |
5898 | int current_p, last_displayed_p; | |
5899 | { | |
5900 | if (current_p) | |
5901 | echo_area_buffer[0] = Qnil; | |
5902 | ||
5903 | if (last_displayed_p) | |
5904 | echo_area_buffer[1] = Qnil; | |
5905 | ||
5906 | message_buf_print = 0; | |
5907 | } | |
5908 | ||
5909 | /* Clear garbaged frames. | |
5910 | ||
5911 | This function is used where the old redisplay called | |
5912 | redraw_garbaged_frames which in turn called redraw_frame which in | |
5913 | turn called clear_frame. The call to clear_frame was a source of | |
5914 | flickering. I believe a clear_frame is not necessary. It should | |
5915 | suffice in the new redisplay to invalidate all current matrices, | |
5916 | and ensure a complete redisplay of all windows. */ | |
5917 | ||
5918 | static void | |
5919 | clear_garbaged_frames () | |
5920 | { | |
5f5c8ee5 GM |
5921 | if (frame_garbaged) |
5922 | { | |
5f5c8ee5 GM |
5923 | Lisp_Object tail, frame; |
5924 | ||
5925 | FOR_EACH_FRAME (tail, frame) | |
5926 | { | |
5927 | struct frame *f = XFRAME (frame); | |
5928 | ||
5929 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
5930 | { | |
5931 | clear_current_matrices (f); | |
5932 | f->garbaged = 0; | |
5933 | } | |
5934 | } | |
5935 | ||
5936 | frame_garbaged = 0; | |
5937 | ++windows_or_buffers_changed; | |
5938 | } | |
c6e89d6c | 5939 | } |
5f5c8ee5 | 5940 | |
5f5c8ee5 | 5941 | |
886bd6f2 GM |
5942 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
5943 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 5944 | mini-windows height has been changed. */ |
5f5c8ee5 | 5945 | |
c6e89d6c GM |
5946 | static int |
5947 | echo_area_display (update_frame_p) | |
5948 | int update_frame_p; | |
5949 | { | |
5950 | Lisp_Object mini_window; | |
5951 | struct window *w; | |
5952 | struct frame *f; | |
5953 | int window_height_changed_p = 0; | |
886bd6f2 | 5954 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5955 | |
886bd6f2 | 5956 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5957 | w = XWINDOW (mini_window); |
5958 | f = XFRAME (WINDOW_FRAME (w)); | |
5959 | ||
5960 | /* Don't display if frame is invisible or not yet initialized. */ | |
5961 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
5962 | return 0; | |
5f5c8ee5 | 5963 | |
1ab3e082 | 5964 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
5965 | /* When Emacs starts, selected_frame may be a visible terminal |
5966 | frame, even if we run under a window system. If we let this | |
5967 | through, a message would be displayed on the terminal. */ | |
622e3754 GM |
5968 | if (EQ (selected_frame, Vterminal_frame) |
5969 | && !NILP (Vwindow_system)) | |
c6e89d6c | 5970 | return 0; |
1ab3e082 | 5971 | #endif /* HAVE_WINDOW_SYSTEM */ |
c6e89d6c GM |
5972 | |
5973 | /* Redraw garbaged frames. */ | |
5974 | if (frame_garbaged) | |
5975 | clear_garbaged_frames (); | |
5976 | ||
5977 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
5978 | { | |
5979 | echo_area_window = mini_window; | |
5980 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 5981 | w->must_be_updated_p = 1; |
c59c668a | 5982 | |
5f5c8ee5 GM |
5983 | if (update_frame_p) |
5984 | { | |
c59c668a GM |
5985 | /* Not called from redisplay_internal. If we changed |
5986 | window configuration, we must redisplay thoroughly. | |
5987 | Otherwise, we can do with updating what we displayed | |
5988 | above. */ | |
5989 | if (window_height_changed_p) | |
5990 | { | |
5991 | ++windows_or_buffers_changed; | |
5992 | ++update_mode_lines; | |
5993 | redisplay_internal (0); | |
5994 | } | |
5995 | else if (FRAME_WINDOW_P (f)) | |
5f5c8ee5 GM |
5996 | { |
5997 | update_single_window (w, 1); | |
5998 | rif->flush_display (f); | |
5999 | } | |
6000 | else | |
6001 | update_frame (f, 1, 1); | |
6002 | } | |
6003 | } | |
6004 | else if (!EQ (mini_window, selected_window)) | |
6005 | windows_or_buffers_changed++; | |
c59c668a GM |
6006 | |
6007 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
6008 | echo_area_buffer[1] = echo_area_buffer[0]; |
6009 | ||
5f5c8ee5 GM |
6010 | /* Prevent redisplay optimization in redisplay_internal by resetting |
6011 | this_line_start_pos. This is done because the mini-buffer now | |
6012 | displays the message instead of its buffer text. */ | |
6013 | if (EQ (mini_window, selected_window)) | |
6014 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
6015 | |
6016 | return window_height_changed_p; | |
5f5c8ee5 GM |
6017 | } |
6018 | ||
6019 | ||
6020 | \f | |
6021 | /*********************************************************************** | |
6022 | Frame Titles | |
6023 | ***********************************************************************/ | |
6024 | ||
6025 | ||
6026 | #ifdef HAVE_WINDOW_SYSTEM | |
6027 | ||
6028 | /* A buffer for constructing frame titles in it; allocated from the | |
6029 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
6030 | ||
6031 | static char *frame_title_buf; | |
6032 | ||
6033 | /* The buffer's end, and a current output position in it. */ | |
6034 | ||
6035 | static char *frame_title_buf_end; | |
6036 | static char *frame_title_ptr; | |
6037 | ||
6038 | ||
6039 | /* Store a single character C for the frame title in frame_title_buf. | |
6040 | Re-allocate frame_title_buf if necessary. */ | |
6041 | ||
6042 | static void | |
6043 | store_frame_title_char (c) | |
6044 | char c; | |
6045 | { | |
6046 | /* If output position has reached the end of the allocated buffer, | |
6047 | double the buffer's size. */ | |
6048 | if (frame_title_ptr == frame_title_buf_end) | |
6049 | { | |
6050 | int len = frame_title_ptr - frame_title_buf; | |
6051 | int new_size = 2 * len * sizeof *frame_title_buf; | |
6052 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
6053 | frame_title_buf_end = frame_title_buf + new_size; | |
6054 | frame_title_ptr = frame_title_buf + len; | |
6055 | } | |
6056 | ||
6057 | *frame_title_ptr++ = c; | |
6058 | } | |
6059 | ||
6060 | ||
6061 | /* Store part of a frame title in frame_title_buf, beginning at | |
6062 | frame_title_ptr. STR is the string to store. Do not copy more | |
6063 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
6064 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
6065 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
6066 | Called from display_mode_element when it is used to build a frame | |
6067 | title. */ | |
6068 | ||
6069 | static int | |
6070 | store_frame_title (str, field_width, precision) | |
6071 | unsigned char *str; | |
6072 | int field_width, precision; | |
6073 | { | |
6074 | int n = 0; | |
6075 | ||
6076 | /* Copy at most PRECISION chars from STR. */ | |
6077 | while ((precision <= 0 || n < precision) | |
6078 | && *str) | |
6079 | { | |
6080 | store_frame_title_char (*str++); | |
6081 | ++n; | |
6082 | } | |
6083 | ||
6084 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
6085 | while (field_width > 0 | |
6086 | && n < field_width) | |
6087 | { | |
6088 | store_frame_title_char (' '); | |
6089 | ++n; | |
6090 | } | |
6091 | ||
6092 | return n; | |
6093 | } | |
6094 | ||
6095 | ||
6096 | /* Set the title of FRAME, if it has changed. The title format is | |
6097 | Vicon_title_format if FRAME is iconified, otherwise it is | |
6098 | frame_title_format. */ | |
6099 | ||
6100 | static void | |
6101 | x_consider_frame_title (frame) | |
6102 | Lisp_Object frame; | |
6103 | { | |
6104 | struct frame *f = XFRAME (frame); | |
6105 | ||
6106 | if (FRAME_WINDOW_P (f) | |
6107 | || FRAME_MINIBUF_ONLY_P (f) | |
6108 | || f->explicit_name) | |
6109 | { | |
6110 | /* Do we have more than one visible frame on this X display? */ | |
6111 | Lisp_Object tail; | |
6112 | Lisp_Object fmt; | |
6113 | struct buffer *obuf; | |
6114 | int len; | |
6115 | struct it it; | |
6116 | ||
9472f927 | 6117 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6118 | { |
9472f927 | 6119 | struct frame *tf = XFRAME (XCAR (tail)); |
5f5c8ee5 GM |
6120 | |
6121 | if (tf != f | |
6122 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
6123 | && !FRAME_MINIBUF_ONLY_P (tf) | |
6124 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
6125 | break; | |
6126 | } | |
6127 | ||
6128 | /* Set global variable indicating that multiple frames exist. */ | |
6129 | multiple_frames = CONSP (tail); | |
6130 | ||
6131 | /* Switch to the buffer of selected window of the frame. Set up | |
6132 | frame_title_ptr so that display_mode_element will output into it; | |
6133 | then display the title. */ | |
6134 | obuf = current_buffer; | |
6135 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
6136 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
6137 | frame_title_ptr = frame_title_buf; | |
6138 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
6139 | NULL, DEFAULT_FACE_ID); | |
6140 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
6141 | frame_title_ptr = NULL; | |
6142 | set_buffer_internal (obuf); | |
6143 | ||
6144 | /* Set the title only if it's changed. This avoids consing in | |
6145 | the common case where it hasn't. (If it turns out that we've | |
6146 | already wasted too much time by walking through the list with | |
6147 | display_mode_element, then we might need to optimize at a | |
6148 | higher level than this.) */ | |
6149 | if (! STRINGP (f->name) | |
6150 | || STRING_BYTES (XSTRING (f->name)) != len | |
6151 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
6152 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
6153 | } | |
6154 | } | |
6155 | ||
6156 | #else /* not HAVE_WINDOW_SYSTEM */ | |
6157 | ||
6158 | #define frame_title_ptr ((char *)0) | |
6159 | #define store_frame_title(str, mincol, maxcol) 0 | |
6160 | ||
6161 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
6162 | ||
6163 | ||
6164 | ||
6165 | \f | |
6166 | /*********************************************************************** | |
6167 | Menu Bars | |
6168 | ***********************************************************************/ | |
6169 | ||
6170 | ||
6171 | /* Prepare for redisplay by updating menu-bar item lists when | |
6172 | appropriate. This can call eval. */ | |
6173 | ||
6174 | void | |
6175 | prepare_menu_bars () | |
6176 | { | |
6177 | int all_windows; | |
6178 | struct gcpro gcpro1, gcpro2; | |
6179 | struct frame *f; | |
6180 | struct frame *tooltip_frame; | |
6181 | ||
6182 | #ifdef HAVE_X_WINDOWS | |
6183 | tooltip_frame = tip_frame; | |
6184 | #else | |
6185 | tooltip_frame = NULL; | |
6186 | #endif | |
6187 | ||
6188 | /* Update all frame titles based on their buffer names, etc. We do | |
6189 | this before the menu bars so that the buffer-menu will show the | |
6190 | up-to-date frame titles. */ | |
6191 | #ifdef HAVE_WINDOW_SYSTEM | |
6192 | if (windows_or_buffers_changed || update_mode_lines) | |
6193 | { | |
6194 | Lisp_Object tail, frame; | |
6195 | ||
6196 | FOR_EACH_FRAME (tail, frame) | |
6197 | { | |
6198 | f = XFRAME (frame); | |
6199 | if (f != tooltip_frame | |
6200 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
6201 | x_consider_frame_title (frame); | |
6202 | } | |
6203 | } | |
6204 | #endif /* HAVE_WINDOW_SYSTEM */ | |
6205 | ||
6206 | /* Update the menu bar item lists, if appropriate. This has to be | |
6207 | done before any actual redisplay or generation of display lines. */ | |
6208 | all_windows = (update_mode_lines | |
6209 | || buffer_shared > 1 | |
6210 | || windows_or_buffers_changed); | |
6211 | if (all_windows) | |
6212 | { | |
6213 | Lisp_Object tail, frame; | |
6214 | int count = specpdl_ptr - specpdl; | |
6215 | ||
6216 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6217 | ||
6218 | FOR_EACH_FRAME (tail, frame) | |
6219 | { | |
6220 | f = XFRAME (frame); | |
6221 | ||
6222 | /* Ignore tooltip frame. */ | |
6223 | if (f == tooltip_frame) | |
6224 | continue; | |
6225 | ||
6226 | /* If a window on this frame changed size, report that to | |
6227 | the user and clear the size-change flag. */ | |
6228 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
6229 | { | |
6230 | Lisp_Object functions; | |
6231 | ||
6232 | /* Clear flag first in case we get an error below. */ | |
6233 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
6234 | functions = Vwindow_size_change_functions; | |
6235 | GCPRO2 (tail, functions); | |
6236 | ||
6237 | while (CONSP (functions)) | |
6238 | { | |
6239 | call1 (XCAR (functions), frame); | |
6240 | functions = XCDR (functions); | |
6241 | } | |
6242 | UNGCPRO; | |
6243 | } | |
6244 | ||
6245 | GCPRO1 (tail); | |
6246 | update_menu_bar (f, 0); | |
6247 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 6248 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
6249 | #endif |
6250 | UNGCPRO; | |
6251 | } | |
6252 | ||
6253 | unbind_to (count, Qnil); | |
6254 | } | |
6255 | else | |
6256 | { | |
886bd6f2 GM |
6257 | struct frame *sf = SELECTED_FRAME (); |
6258 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 6259 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 6260 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
6261 | #endif |
6262 | } | |
6263 | ||
6264 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
6265 | pending_menu_activation is not defined. */ | |
6266 | #ifdef USE_X_TOOLKIT | |
6267 | pending_menu_activation = 0; | |
6268 | #endif | |
6269 | } | |
6270 | ||
6271 | ||
6272 | /* Update the menu bar item list for frame F. This has to be done | |
6273 | before we start to fill in any display lines, because it can call | |
6274 | eval. | |
6275 | ||
6276 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
6277 | ||
6278 | static void | |
6279 | update_menu_bar (f, save_match_data) | |
6280 | struct frame *f; | |
6281 | int save_match_data; | |
6282 | { | |
6283 | Lisp_Object window; | |
6284 | register struct window *w; | |
6285 | ||
6286 | window = FRAME_SELECTED_WINDOW (f); | |
6287 | w = XWINDOW (window); | |
6288 | ||
6289 | if (update_mode_lines) | |
6290 | w->update_mode_line = Qt; | |
6291 | ||
6292 | if (FRAME_WINDOW_P (f) | |
6293 | ? | |
6294 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6295 | FRAME_EXTERNAL_MENU_BAR (f) | |
6296 | #else | |
6297 | FRAME_MENU_BAR_LINES (f) > 0 | |
6298 | #endif | |
6299 | : FRAME_MENU_BAR_LINES (f) > 0) | |
6300 | { | |
6301 | /* If the user has switched buffers or windows, we need to | |
6302 | recompute to reflect the new bindings. But we'll | |
6303 | recompute when update_mode_lines is set too; that means | |
6304 | that people can use force-mode-line-update to request | |
6305 | that the menu bar be recomputed. The adverse effect on | |
6306 | the rest of the redisplay algorithm is about the same as | |
6307 | windows_or_buffers_changed anyway. */ | |
6308 | if (windows_or_buffers_changed | |
6309 | || !NILP (w->update_mode_line) | |
6310 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6311 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6312 | != !NILP (w->last_had_star)) | |
6313 | || ((!NILP (Vtransient_mark_mode) | |
6314 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6315 | != !NILP (w->region_showing))) | |
6316 | { | |
6317 | struct buffer *prev = current_buffer; | |
6318 | int count = specpdl_ptr - specpdl; | |
6319 | ||
6320 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
6321 | if (save_match_data) | |
6322 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6323 | if (NILP (Voverriding_local_map_menu_flag)) | |
6324 | { | |
6325 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6326 | specbind (Qoverriding_local_map, Qnil); | |
6327 | } | |
6328 | ||
6329 | /* Run the Lucid hook. */ | |
6330 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
6331 | ||
6332 | /* If it has changed current-menubar from previous value, | |
6333 | really recompute the menu-bar from the value. */ | |
6334 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
6335 | call0 (Qrecompute_lucid_menubar); | |
6336 | ||
6337 | safe_run_hooks (Qmenu_bar_update_hook); | |
6338 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
6339 | ||
6340 | /* Redisplay the menu bar in case we changed it. */ | |
6341 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6342 | if (FRAME_WINDOW_P (f)) | |
6343 | set_frame_menubar (f, 0, 0); | |
6344 | else | |
6345 | /* On a terminal screen, the menu bar is an ordinary screen | |
6346 | line, and this makes it get updated. */ | |
6347 | w->update_mode_line = Qt; | |
6348 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6349 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
6350 | line, and this makes it get updated. */ | |
6351 | w->update_mode_line = Qt; | |
6352 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6353 | ||
6354 | unbind_to (count, Qnil); | |
6355 | set_buffer_internal_1 (prev); | |
6356 | } | |
6357 | } | |
6358 | } | |
6359 | ||
6360 | ||
6361 | \f | |
6362 | /*********************************************************************** | |
e037b9ec | 6363 | Tool-bars |
5f5c8ee5 GM |
6364 | ***********************************************************************/ |
6365 | ||
6366 | #ifdef HAVE_WINDOW_SYSTEM | |
6367 | ||
e037b9ec | 6368 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
6369 | before we start to fill in any display lines. Called from |
6370 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
6371 | and restore it here. */ | |
6372 | ||
6373 | static void | |
e037b9ec | 6374 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
6375 | struct frame *f; |
6376 | int save_match_data; | |
6377 | { | |
e037b9ec GM |
6378 | if (WINDOWP (f->tool_bar_window) |
6379 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
6380 | { |
6381 | Lisp_Object window; | |
6382 | struct window *w; | |
6383 | ||
6384 | window = FRAME_SELECTED_WINDOW (f); | |
6385 | w = XWINDOW (window); | |
6386 | ||
6387 | /* If the user has switched buffers or windows, we need to | |
6388 | recompute to reflect the new bindings. But we'll | |
6389 | recompute when update_mode_lines is set too; that means | |
6390 | that people can use force-mode-line-update to request | |
6391 | that the menu bar be recomputed. The adverse effect on | |
6392 | the rest of the redisplay algorithm is about the same as | |
6393 | windows_or_buffers_changed anyway. */ | |
6394 | if (windows_or_buffers_changed | |
6395 | || !NILP (w->update_mode_line) | |
6396 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6397 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6398 | != !NILP (w->last_had_star)) | |
6399 | || ((!NILP (Vtransient_mark_mode) | |
6400 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6401 | != !NILP (w->region_showing))) | |
6402 | { | |
6403 | struct buffer *prev = current_buffer; | |
6404 | int count = specpdl_ptr - specpdl; | |
a2889657 | 6405 | |
5f5c8ee5 GM |
6406 | /* Set current_buffer to the buffer of the selected |
6407 | window of the frame, so that we get the right local | |
6408 | keymaps. */ | |
6409 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 6410 | |
5f5c8ee5 GM |
6411 | /* Save match data, if we must. */ |
6412 | if (save_match_data) | |
6413 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6414 | ||
6415 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
6416 | if (NILP (Voverriding_local_map_menu_flag)) | |
6417 | { | |
6418 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6419 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 6420 | } |
1f40cad2 | 6421 | |
e037b9ec GM |
6422 | /* Build desired tool-bar items from keymaps. */ |
6423 | f->desired_tool_bar_items | |
6424 | = tool_bar_items (f->desired_tool_bar_items, | |
6425 | &f->n_desired_tool_bar_items); | |
5f5c8ee5 | 6426 | |
e037b9ec | 6427 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
6428 | w->update_mode_line = Qt; |
6429 | ||
6430 | unbind_to (count, Qnil); | |
6431 | set_buffer_internal_1 (prev); | |
81d478f3 | 6432 | } |
a2889657 JB |
6433 | } |
6434 | } | |
6435 | ||
6c4429a5 | 6436 | |
e037b9ec GM |
6437 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
6438 | F's desired tool-bar contents. F->desired_tool_bar_items must have | |
5f5c8ee5 GM |
6439 | been set up previously by calling prepare_menu_bars. */ |
6440 | ||
a2889657 | 6441 | static void |
e037b9ec | 6442 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 6443 | struct frame *f; |
a2889657 | 6444 | { |
5f5c8ee5 GM |
6445 | int i, size, size_needed, string_idx; |
6446 | struct gcpro gcpro1, gcpro2, gcpro3; | |
6447 | Lisp_Object image, plist, props; | |
a2889657 | 6448 | |
5f5c8ee5 GM |
6449 | image = plist = props = Qnil; |
6450 | GCPRO3 (image, plist, props); | |
a2889657 | 6451 | |
e037b9ec | 6452 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
6453 | Otherwise, make a new string. */ |
6454 | ||
6455 | /* The size of the string we might be able to reuse. */ | |
e037b9ec GM |
6456 | size = (STRINGP (f->desired_tool_bar_string) |
6457 | ? XSTRING (f->desired_tool_bar_string)->size | |
5f5c8ee5 GM |
6458 | : 0); |
6459 | ||
6460 | /* Each image in the string we build is preceded by a space, | |
6461 | and there is a space at the end. */ | |
e037b9ec | 6462 | size_needed = f->n_desired_tool_bar_items + 1; |
5f5c8ee5 | 6463 | |
e037b9ec | 6464 | /* Reuse f->desired_tool_bar_string, if possible. */ |
5f5c8ee5 | 6465 | if (size < size_needed) |
e037b9ec | 6466 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), ' '); |
5f5c8ee5 GM |
6467 | else |
6468 | { | |
6469 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
6470 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 6471 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6472 | } |
a2889657 | 6473 | |
5f5c8ee5 | 6474 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
6475 | put a `menu_item' property on tool-bar items with a value that |
6476 | is the index of the item in F's tool-bar item vector. */ | |
5f5c8ee5 | 6477 | for (i = 0, string_idx = 0; |
e037b9ec | 6478 | i < f->n_desired_tool_bar_items; |
5f5c8ee5 | 6479 | ++i, string_idx += 1) |
a2889657 | 6480 | { |
5f5c8ee5 | 6481 | #define PROP(IDX) \ |
e037b9ec GM |
6482 | (XVECTOR (f->desired_tool_bar_items) \ |
6483 | ->contents[i * TOOL_BAR_ITEM_NSLOTS + (IDX)]) | |
5f5c8ee5 | 6484 | |
e037b9ec GM |
6485 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
6486 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
5f5c8ee5 GM |
6487 | int margin, relief; |
6488 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; | |
6489 | extern Lisp_Object Qlaplace; | |
6490 | ||
6491 | /* If image is a vector, choose the image according to the | |
6492 | button state. */ | |
e037b9ec | 6493 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
6494 | if (VECTORP (image)) |
6495 | { | |
e037b9ec | 6496 | enum tool_bar_item_image idx; |
5f5c8ee5 GM |
6497 | |
6498 | if (enabled_p) | |
6499 | idx = (selected_p | |
e037b9ec GM |
6500 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
6501 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
6502 | else |
6503 | idx = (selected_p | |
e037b9ec GM |
6504 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
6505 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 GM |
6506 | |
6507 | xassert (XVECTOR (image)->size >= idx); | |
6508 | image = XVECTOR (image)->contents[idx]; | |
6509 | } | |
6510 | ||
6511 | /* Ignore invalid image specifications. */ | |
6512 | if (!valid_image_p (image)) | |
6513 | continue; | |
6514 | ||
e037b9ec | 6515 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
6516 | plist = Fcopy_sequence (XCDR (image)); |
6517 | ||
6518 | /* Compute margin and relief to draw. */ | |
e037b9ec GM |
6519 | relief = tool_bar_button_relief > 0 ? tool_bar_button_relief : 3; |
6520 | margin = relief + max (0, tool_bar_button_margin); | |
5f5c8ee5 | 6521 | |
e037b9ec | 6522 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
6523 | { |
6524 | /* Add a `:relief' property to the image spec if the item is | |
6525 | selected. */ | |
6526 | if (selected_p) | |
6527 | { | |
6528 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
6529 | margin -= relief; | |
6530 | } | |
6531 | } | |
6532 | else | |
6533 | { | |
6534 | /* If image is selected, display it pressed, i.e. with a | |
6535 | negative relief. If it's not selected, display it with a | |
6536 | raised relief. */ | |
6537 | plist = Fplist_put (plist, QCrelief, | |
6538 | (selected_p | |
6539 | ? make_number (-relief) | |
6540 | : make_number (relief))); | |
6541 | margin -= relief; | |
6542 | } | |
6543 | ||
6544 | /* Put a margin around the image. */ | |
6545 | if (margin) | |
6546 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
6547 | ||
6548 | /* If button is not enabled, make the image appear disabled by | |
6549 | applying an appropriate algorithm to it. */ | |
6550 | if (!enabled_p) | |
6551 | plist = Fplist_put (plist, QCalgorithm, Qlaplace); | |
6552 | ||
6553 | /* Put a `display' text property on the string for the image to | |
6554 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 6555 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
6556 | vector. */ |
6557 | image = Fcons (Qimage, plist); | |
6558 | props = list4 (Qdisplay, image, | |
e037b9ec | 6559 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)), |
5f5c8ee5 GM |
6560 | Fadd_text_properties (make_number (string_idx), |
6561 | make_number (string_idx + 1), | |
e037b9ec | 6562 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6563 | #undef PROP |
a2889657 JB |
6564 | } |
6565 | ||
5f5c8ee5 GM |
6566 | UNGCPRO; |
6567 | } | |
6568 | ||
6569 | ||
e037b9ec | 6570 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
6571 | |
6572 | static void | |
e037b9ec | 6573 | display_tool_bar_line (it) |
5f5c8ee5 GM |
6574 | struct it *it; |
6575 | { | |
6576 | struct glyph_row *row = it->glyph_row; | |
6577 | int max_x = it->last_visible_x; | |
6578 | struct glyph *last; | |
6579 | ||
6580 | prepare_desired_row (row); | |
6581 | row->y = it->current_y; | |
6582 | ||
6583 | while (it->current_x < max_x) | |
a2889657 | 6584 | { |
5f5c8ee5 | 6585 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 6586 | |
5f5c8ee5 GM |
6587 | /* Get the next display element. */ |
6588 | if (!get_next_display_element (it)) | |
6589 | break; | |
73af359d | 6590 | |
5f5c8ee5 GM |
6591 | /* Produce glyphs. */ |
6592 | x_before = it->current_x; | |
6593 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
6594 | PRODUCE_GLYPHS (it); | |
daa37602 | 6595 | |
5f5c8ee5 GM |
6596 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
6597 | i = 0; | |
6598 | x = x_before; | |
6599 | while (i < nglyphs) | |
6600 | { | |
6601 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
6602 | ||
6603 | if (x + glyph->pixel_width > max_x) | |
6604 | { | |
6605 | /* Glyph doesn't fit on line. */ | |
6606 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
6607 | it->current_x = x; | |
6608 | goto out; | |
6609 | } | |
daa37602 | 6610 | |
5f5c8ee5 GM |
6611 | ++it->hpos; |
6612 | x += glyph->pixel_width; | |
6613 | ++i; | |
6614 | } | |
6615 | ||
6616 | /* Stop at line ends. */ | |
6617 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6618 | break; | |
6619 | ||
6620 | set_iterator_to_next (it); | |
a2889657 | 6621 | } |
a2889657 | 6622 | |
5f5c8ee5 | 6623 | out:; |
a2889657 | 6624 | |
5f5c8ee5 GM |
6625 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
6626 | extend_face_to_end_of_line (it); | |
6627 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
6628 | last->right_box_line_p = 1; | |
6629 | compute_line_metrics (it); | |
6630 | ||
e037b9ec | 6631 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
6632 | if (!row->displays_text_p) |
6633 | { | |
312246d1 GM |
6634 | row->height = row->phys_height = it->last_visible_y - row->y; |
6635 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
6636 | } |
6637 | ||
6638 | row->full_width_p = 1; | |
6639 | row->continued_p = 0; | |
6640 | row->truncated_on_left_p = 0; | |
6641 | row->truncated_on_right_p = 0; | |
6642 | ||
6643 | it->current_x = it->hpos = 0; | |
6644 | it->current_y += row->height; | |
6645 | ++it->vpos; | |
6646 | ++it->glyph_row; | |
a2889657 | 6647 | } |
96a410bc | 6648 | |
5f5c8ee5 | 6649 | |
e037b9ec | 6650 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 6651 | items of frame F visible. */ |
96a410bc | 6652 | |
d39b6696 | 6653 | static int |
e037b9ec | 6654 | tool_bar_lines_needed (f) |
5f5c8ee5 | 6655 | struct frame *f; |
d39b6696 | 6656 | { |
e037b9ec | 6657 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
6658 | struct it it; |
6659 | ||
e037b9ec GM |
6660 | /* Initialize an iterator for iteration over |
6661 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
6662 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
6663 | it.first_visible_x = 0; |
6664 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 6665 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
6666 | |
6667 | while (!ITERATOR_AT_END_P (&it)) | |
6668 | { | |
6669 | it.glyph_row = w->desired_matrix->rows; | |
6670 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 6671 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
6672 | } |
6673 | ||
6674 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 6675 | } |
96a410bc | 6676 | |
5f5c8ee5 | 6677 | |
e037b9ec | 6678 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
6679 | height should be changed. */ |
6680 | ||
6681 | static int | |
e037b9ec | 6682 | redisplay_tool_bar (f) |
5f5c8ee5 | 6683 | struct frame *f; |
96a410bc | 6684 | { |
5f5c8ee5 GM |
6685 | struct window *w; |
6686 | struct it it; | |
6687 | struct glyph_row *row; | |
6688 | int change_height_p = 0; | |
6689 | ||
e037b9ec GM |
6690 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
6691 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 6692 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
6693 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
6694 | if (!WINDOWP (f->tool_bar_window) | |
6695 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
6696 | XFASTINT (w->height) == 0)) |
6697 | return 0; | |
96a410bc | 6698 | |
e037b9ec GM |
6699 | /* Set up an iterator for the tool-bar window. */ |
6700 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
6701 | it.first_visible_x = 0; |
6702 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6703 | row = it.glyph_row; | |
3450d04c | 6704 | |
e037b9ec GM |
6705 | /* Build a string that represents the contents of the tool-bar. */ |
6706 | build_desired_tool_bar_string (f); | |
6707 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 6708 | |
e037b9ec | 6709 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 6710 | while (it.current_y < it.last_visible_y) |
e037b9ec | 6711 | display_tool_bar_line (&it); |
3450d04c | 6712 | |
e037b9ec | 6713 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
6714 | window, so don't do it. */ |
6715 | w->desired_matrix->no_scrolling_p = 1; | |
6716 | w->must_be_updated_p = 1; | |
3450d04c | 6717 | |
e037b9ec | 6718 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
6719 | { |
6720 | int nlines; | |
6721 | ||
6722 | /* If there are blank lines at the end, except for a partially | |
6723 | visible blank line at the end that is smaller than | |
e037b9ec | 6724 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
6725 | row = it.glyph_row - 1; |
6726 | if (!row->displays_text_p | |
6727 | && row->height >= CANON_Y_UNIT (f)) | |
6728 | change_height_p = 1; | |
6729 | ||
e037b9ec GM |
6730 | /* If row displays tool-bar items, but is partially visible, |
6731 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
6732 | if (row->displays_text_p |
6733 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
6734 | change_height_p = 1; | |
6735 | ||
e037b9ec | 6736 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
6737 | frame parameter. */ |
6738 | if (change_height_p | |
e037b9ec | 6739 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
6740 | nlines != XFASTINT (w->height))) |
6741 | { | |
e037b9ec | 6742 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 GM |
6743 | Lisp_Object frame; |
6744 | ||
6745 | XSETFRAME (frame, f); | |
6746 | clear_glyph_matrix (w->desired_matrix); | |
6747 | Fmodify_frame_parameters (frame, | |
e037b9ec | 6748 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
6749 | make_number (nlines)), |
6750 | Qnil)); | |
6751 | fonts_changed_p = 1; | |
6752 | } | |
6753 | } | |
3450d04c | 6754 | |
5f5c8ee5 | 6755 | return change_height_p; |
96a410bc | 6756 | } |
90adcf20 | 6757 | |
5f5c8ee5 | 6758 | |
e037b9ec GM |
6759 | /* Get information about the tool-bar item which is displayed in GLYPH |
6760 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
6761 | properties start in F->current_tool_bar_items. Value is zero if | |
6762 | GLYPH doesn't display a tool-bar item. */ | |
5f5c8ee5 GM |
6763 | |
6764 | int | |
e037b9ec | 6765 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
6766 | struct frame *f; |
6767 | struct glyph *glyph; | |
6768 | int *prop_idx; | |
90adcf20 | 6769 | { |
5f5c8ee5 GM |
6770 | Lisp_Object prop; |
6771 | int success_p; | |
6772 | ||
6773 | /* Get the text property `menu-item' at pos. The value of that | |
6774 | property is the start index of this item's properties in | |
e037b9ec | 6775 | F->current_tool_bar_items. */ |
5f5c8ee5 | 6776 | prop = Fget_text_property (make_number (glyph->charpos), |
e037b9ec | 6777 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
6778 | if (INTEGERP (prop)) |
6779 | { | |
6780 | *prop_idx = XINT (prop); | |
6781 | success_p = 1; | |
6782 | } | |
6783 | else | |
6784 | success_p = 0; | |
90adcf20 | 6785 | |
5f5c8ee5 GM |
6786 | return success_p; |
6787 | } | |
6788 | ||
6789 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 6790 | |
feb0c42f | 6791 | |
5f5c8ee5 GM |
6792 | \f |
6793 | /************************************************************************ | |
6794 | Horizontal scrolling | |
6795 | ************************************************************************/ | |
feb0c42f | 6796 | |
5f5c8ee5 GM |
6797 | static int hscroll_window_tree P_ ((Lisp_Object)); |
6798 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 6799 | |
5f5c8ee5 GM |
6800 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
6801 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
6802 | that it is not within a certain margin at the window's left and | |
6803 | right border. Value is non-zero if any window's hscroll has been | |
6804 | changed. */ | |
6805 | ||
6806 | static int | |
6807 | hscroll_window_tree (window) | |
6808 | Lisp_Object window; | |
6809 | { | |
6810 | int hscrolled_p = 0; | |
6811 | ||
6812 | while (WINDOWP (window)) | |
90adcf20 | 6813 | { |
5f5c8ee5 GM |
6814 | struct window *w = XWINDOW (window); |
6815 | ||
6816 | if (WINDOWP (w->hchild)) | |
6817 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
6818 | else if (WINDOWP (w->vchild)) | |
6819 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
6820 | else if (w->cursor.vpos >= 0) | |
6821 | { | |
6822 | int hscroll_margin, text_area_x, text_area_y; | |
6823 | int text_area_width, text_area_height; | |
92a90e89 GM |
6824 | struct glyph_row *current_cursor_row |
6825 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
6826 | struct glyph_row *desired_cursor_row | |
6827 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
6828 | struct glyph_row *cursor_row | |
6829 | = (desired_cursor_row->enabled_p | |
6830 | ? desired_cursor_row | |
6831 | : current_cursor_row); | |
a2725ab2 | 6832 | |
5f5c8ee5 GM |
6833 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
6834 | &text_area_width, &text_area_height); | |
90adcf20 | 6835 | |
5f5c8ee5 GM |
6836 | /* Scroll when cursor is inside this scroll margin. */ |
6837 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
6838 | ||
6839 | if ((XFASTINT (w->hscroll) | |
6840 | && w->cursor.x < hscroll_margin) | |
92a90e89 GM |
6841 | || (cursor_row->enabled_p |
6842 | && cursor_row->truncated_on_right_p | |
5f5c8ee5 | 6843 | && (w->cursor.x > text_area_width - hscroll_margin))) |
08b610e4 | 6844 | { |
5f5c8ee5 GM |
6845 | struct it it; |
6846 | int hscroll; | |
6847 | struct buffer *saved_current_buffer; | |
6848 | int pt; | |
6849 | ||
6850 | /* Find point in a display of infinite width. */ | |
6851 | saved_current_buffer = current_buffer; | |
6852 | current_buffer = XBUFFER (w->buffer); | |
6853 | ||
6854 | if (w == XWINDOW (selected_window)) | |
6855 | pt = BUF_PT (current_buffer); | |
6856 | else | |
08b610e4 | 6857 | { |
5f5c8ee5 GM |
6858 | pt = marker_position (w->pointm); |
6859 | pt = max (BEGV, pt); | |
6860 | pt = min (ZV, pt); | |
6861 | } | |
6862 | ||
6863 | /* Move iterator to pt starting at cursor_row->start in | |
6864 | a line with infinite width. */ | |
6865 | init_to_row_start (&it, w, cursor_row); | |
6866 | it.last_visible_x = INFINITY; | |
6867 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
6868 | current_buffer = saved_current_buffer; | |
6869 | ||
6870 | /* Center cursor in window. */ | |
6871 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
6872 | / CANON_X_UNIT (it.f)); | |
6873 | ||
6874 | /* Don't call Fset_window_hscroll if value hasn't | |
6875 | changed because it will prevent redisplay | |
6876 | optimizations. */ | |
6877 | if (XFASTINT (w->hscroll) != hscroll) | |
6878 | { | |
6879 | Fset_window_hscroll (window, make_number (hscroll)); | |
6880 | hscrolled_p = 1; | |
08b610e4 | 6881 | } |
08b610e4 | 6882 | } |
08b610e4 | 6883 | } |
a2725ab2 | 6884 | |
5f5c8ee5 | 6885 | window = w->next; |
90adcf20 | 6886 | } |
cd6dfed6 | 6887 | |
5f5c8ee5 GM |
6888 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
6889 | return hscrolled_p; | |
6890 | } | |
6891 | ||
6892 | ||
6893 | /* Set hscroll so that cursor is visible and not inside horizontal | |
6894 | scroll margins for all windows in the tree rooted at WINDOW. See | |
6895 | also hscroll_window_tree above. Value is non-zero if any window's | |
6896 | hscroll has been changed. If it has, desired matrices on the frame | |
6897 | of WINDOW are cleared. */ | |
6898 | ||
6899 | static int | |
6900 | hscroll_windows (window) | |
6901 | Lisp_Object window; | |
6902 | { | |
6903 | int hscrolled_p = hscroll_window_tree (window); | |
6904 | if (hscrolled_p) | |
6905 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
6906 | return hscrolled_p; | |
90adcf20 | 6907 | } |
5f5c8ee5 GM |
6908 | |
6909 | ||
90adcf20 | 6910 | \f |
5f5c8ee5 GM |
6911 | /************************************************************************ |
6912 | Redisplay | |
6913 | ************************************************************************/ | |
6914 | ||
6915 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
6916 | to a non-zero value. This is sometimes handy to have in a debugger | |
6917 | session. */ | |
6918 | ||
6919 | #if GLYPH_DEBUG | |
a2889657 | 6920 | |
5f5c8ee5 GM |
6921 | /* First and last unchanged row for try_window_id. */ |
6922 | ||
6923 | int debug_first_unchanged_at_end_vpos; | |
6924 | int debug_last_unchanged_at_beg_vpos; | |
6925 | ||
6926 | /* Delta vpos and y. */ | |
6927 | ||
6928 | int debug_dvpos, debug_dy; | |
6929 | ||
6930 | /* Delta in characters and bytes for try_window_id. */ | |
6931 | ||
6932 | int debug_delta, debug_delta_bytes; | |
6933 | ||
6934 | /* Values of window_end_pos and window_end_vpos at the end of | |
6935 | try_window_id. */ | |
6936 | ||
6937 | int debug_end_pos, debug_end_vpos; | |
6938 | ||
6939 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
6940 | format string. A1...A9 are a supplement for a variable-length | |
6941 | argument list. If trace_redisplay_p is non-zero also printf the | |
6942 | resulting string to stderr. */ | |
6943 | ||
6944 | static void | |
6945 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
6946 | struct window *w; | |
6947 | char *fmt; | |
6948 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
6949 | { | |
6950 | char buffer[512]; | |
6951 | char *method = w->desired_matrix->method; | |
6952 | int len = strlen (method); | |
6953 | int size = sizeof w->desired_matrix->method; | |
6954 | int remaining = size - len - 1; | |
6955 | ||
6956 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
6957 | if (len && remaining) | |
6958 | { | |
6959 | method[len] = '|'; | |
6960 | --remaining, ++len; | |
6961 | } | |
6962 | ||
6963 | strncpy (method + len, buffer, remaining); | |
6964 | ||
6965 | if (trace_redisplay_p) | |
6966 | fprintf (stderr, "%p (%s): %s\n", | |
6967 | w, | |
6968 | ((BUFFERP (w->buffer) | |
6969 | && STRINGP (XBUFFER (w->buffer)->name)) | |
6970 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
6971 | : "no buffer"), | |
6972 | buffer); | |
6973 | } | |
a2889657 | 6974 | |
5f5c8ee5 | 6975 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 6976 | |
a2889657 | 6977 | |
5f5c8ee5 GM |
6978 | /* This counter is used to clear the face cache every once in a while |
6979 | in redisplay_internal. It is incremented for each redisplay. | |
6980 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
6981 | cleared. */ | |
0d231165 | 6982 | |
5f5c8ee5 | 6983 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
6984 | static int clear_face_cache_count; |
6985 | ||
20de20dc | 6986 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
6987 | |
6988 | static struct frame *previous_terminal_frame; | |
6989 | ||
6990 | /* Non-zero while redisplay_internal is in progress. */ | |
6991 | ||
6992 | int redisplaying_p; | |
6993 | ||
6994 | ||
6995 | /* Value is non-zero if all changes in window W, which displays | |
6996 | current_buffer, are in the text between START and END. START is a | |
6997 | buffer position, END is given as a distance from Z. Used in | |
6998 | redisplay_internal for display optimization. */ | |
6999 | ||
7000 | static INLINE int | |
7001 | text_outside_line_unchanged_p (w, start, end) | |
7002 | struct window *w; | |
7003 | int start, end; | |
7004 | { | |
7005 | int unchanged_p = 1; | |
7006 | ||
7007 | /* If text or overlays have changed, see where. */ | |
7008 | if (XFASTINT (w->last_modified) < MODIFF | |
7009 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
7010 | { | |
7011 | /* Gap in the line? */ | |
7012 | if (GPT < start || Z - GPT < end) | |
7013 | unchanged_p = 0; | |
7014 | ||
7015 | /* Changes start in front of the line, or end after it? */ | |
7016 | if (unchanged_p | |
9142dd5b GM |
7017 | && (BEG_UNCHANGED < start - 1 |
7018 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
7019 | unchanged_p = 0; |
7020 | ||
7021 | /* If selective display, can't optimize if changes start at the | |
7022 | beginning of the line. */ | |
7023 | if (unchanged_p | |
7024 | && INTEGERP (current_buffer->selective_display) | |
7025 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 7026 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 GM |
7027 | unchanged_p = 0; |
7028 | } | |
7029 | ||
7030 | return unchanged_p; | |
7031 | } | |
7032 | ||
7033 | ||
7034 | /* Do a frame update, taking possible shortcuts into account. This is | |
7035 | the main external entry point for redisplay. | |
7036 | ||
7037 | If the last redisplay displayed an echo area message and that message | |
7038 | is no longer requested, we clear the echo area or bring back the | |
7039 | mini-buffer if that is in use. */ | |
20de20dc | 7040 | |
a2889657 JB |
7041 | void |
7042 | redisplay () | |
e9874cee RS |
7043 | { |
7044 | redisplay_internal (0); | |
7045 | } | |
7046 | ||
260a86a0 KH |
7047 | /* Return 1 if point moved out of or into a composition. Otherwise |
7048 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
7049 | position. BUF and PT are the current point buffer and position. */ | |
7050 | ||
7051 | int | |
7052 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
7053 | struct buffer *prev_buf, *buf; | |
7054 | int prev_pt, pt; | |
7055 | { | |
7056 | int start, end; | |
7057 | Lisp_Object prop; | |
7058 | Lisp_Object buffer; | |
7059 | ||
7060 | XSETBUFFER (buffer, buf); | |
7061 | /* Check a composition at the last point if point moved within the | |
7062 | same buffer. */ | |
7063 | if (prev_buf == buf) | |
7064 | { | |
7065 | if (prev_pt == pt) | |
7066 | /* Point didn't move. */ | |
7067 | return 0; | |
7068 | ||
7069 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) | |
7070 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
7071 | && COMPOSITION_VALID_P (start, end, prop) | |
7072 | && start < prev_pt && end > prev_pt) | |
7073 | /* The last point was within the composition. Return 1 iff | |
7074 | point moved out of the composition. */ | |
7075 | return (pt <= start || pt >= end); | |
7076 | } | |
7077 | ||
7078 | /* Check a composition at the current point. */ | |
7079 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
7080 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
7081 | && COMPOSITION_VALID_P (start, end, prop) | |
7082 | && start < pt && end > pt); | |
7083 | } | |
5f5c8ee5 | 7084 | |
9142dd5b GM |
7085 | /* Reconsider the setting of B->clip_changed which is displayed |
7086 | in window W. */ | |
7087 | ||
7088 | static INLINE void | |
7089 | reconsider_clip_changes (w, b) | |
7090 | struct window *w; | |
7091 | struct buffer *b; | |
7092 | { | |
7093 | if (b->prevent_redisplay_optimizations_p) | |
7094 | b->clip_changed = 1; | |
7095 | else if (b->clip_changed | |
7096 | && !NILP (w->window_end_valid) | |
7097 | && w->current_matrix->buffer == b | |
7098 | && w->current_matrix->zv == BUF_ZV (b) | |
7099 | && w->current_matrix->begv == BUF_BEGV (b)) | |
7100 | b->clip_changed = 0; | |
260a86a0 KH |
7101 | |
7102 | /* If display wasn't paused, and W is not a tool bar window, see if | |
7103 | point has been moved into or out of a composition. In that case, | |
7104 | we set b->clip_changed to 1 to force updating the screen. If | |
7105 | b->clip_changed has already been set to 1, we can skip this | |
7106 | check. */ | |
7107 | if (!b->clip_changed | |
7108 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
7109 | { | |
7110 | int pt; | |
7111 | ||
7112 | if (w == XWINDOW (selected_window)) | |
7113 | pt = BUF_PT (current_buffer); | |
7114 | else | |
7115 | pt = marker_position (w->pointm); | |
7116 | ||
7117 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
7118 | || pt != w->last_point) | |
7119 | && check_point_in_composition (w->current_matrix->buffer, | |
7120 | w->last_point, | |
7121 | XBUFFER (w->buffer), pt)) | |
7122 | b->clip_changed = 1; | |
7123 | } | |
9142dd5b GM |
7124 | } |
7125 | ||
7126 | ||
5f5c8ee5 GM |
7127 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
7128 | response to any user action; therefore, we should preserve the echo | |
7129 | area. (Actually, our caller does that job.) Perhaps in the future | |
7130 | avoid recentering windows if it is not necessary; currently that | |
7131 | causes some problems. */ | |
e9874cee RS |
7132 | |
7133 | static void | |
7134 | redisplay_internal (preserve_echo_area) | |
7135 | int preserve_echo_area; | |
a2889657 | 7136 | { |
5f5c8ee5 GM |
7137 | struct window *w = XWINDOW (selected_window); |
7138 | struct frame *f = XFRAME (w->frame); | |
7139 | int pause; | |
a2889657 | 7140 | int must_finish = 0; |
5f5c8ee5 | 7141 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 7142 | int number_of_visible_frames; |
28514cd9 | 7143 | int count; |
886bd6f2 | 7144 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 7145 | |
5f5c8ee5 GM |
7146 | /* Non-zero means redisplay has to consider all windows on all |
7147 | frames. Zero means, only selected_window is considered. */ | |
7148 | int consider_all_windows_p; | |
7149 | ||
7150 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
7151 | ||
7152 | /* No redisplay if running in batch mode or frame is not yet fully | |
7153 | initialized, or redisplay is explicitly turned off by setting | |
7154 | Vinhibit_redisplay. */ | |
7155 | if (noninteractive | |
7156 | || !NILP (Vinhibit_redisplay) | |
7157 | || !f->glyphs_initialized_p) | |
a2889657 JB |
7158 | return; |
7159 | ||
5f5c8ee5 GM |
7160 | /* The flag redisplay_performed_directly_p is set by |
7161 | direct_output_for_insert when it already did the whole screen | |
7162 | update necessary. */ | |
7163 | if (redisplay_performed_directly_p) | |
7164 | { | |
7165 | redisplay_performed_directly_p = 0; | |
7166 | if (!hscroll_windows (selected_window)) | |
7167 | return; | |
7168 | } | |
7169 | ||
15f0cf78 RS |
7170 | #ifdef USE_X_TOOLKIT |
7171 | if (popup_activated ()) | |
7172 | return; | |
7173 | #endif | |
7174 | ||
28514cd9 | 7175 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 7176 | if (redisplaying_p) |
735c094c KH |
7177 | return; |
7178 | ||
28514cd9 GM |
7179 | /* Record a function that resets redisplaying_p to its old value |
7180 | when we leave this function. */ | |
7181 | count = specpdl_ptr - specpdl; | |
7182 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); | |
7183 | ++redisplaying_p; | |
7184 | ||
8b32d885 RS |
7185 | retry: |
7186 | ||
9142dd5b GM |
7187 | reconsider_clip_changes (w, current_buffer); |
7188 | ||
5f5c8ee5 GM |
7189 | /* If new fonts have been loaded that make a glyph matrix adjustment |
7190 | necessary, do it. */ | |
7191 | if (fonts_changed_p) | |
7192 | { | |
7193 | adjust_glyphs (NULL); | |
7194 | ++windows_or_buffers_changed; | |
7195 | fonts_changed_p = 0; | |
7196 | } | |
7197 | ||
886bd6f2 GM |
7198 | if (! FRAME_WINDOW_P (sf) |
7199 | && previous_terminal_frame != sf) | |
20de20dc | 7200 | { |
5f5c8ee5 GM |
7201 | /* Since frames on an ASCII terminal share the same display |
7202 | area, displaying a different frame means redisplay the whole | |
7203 | thing. */ | |
20de20dc | 7204 | windows_or_buffers_changed++; |
886bd6f2 GM |
7205 | SET_FRAME_GARBAGED (sf); |
7206 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 7207 | } |
886bd6f2 | 7208 | previous_terminal_frame = sf; |
20de20dc | 7209 | |
5f5c8ee5 GM |
7210 | /* Set the visible flags for all frames. Do this before checking |
7211 | for resized or garbaged frames; they want to know if their frames | |
7212 | are visible. See the comment in frame.h for | |
7213 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 7214 | { |
35f56f96 | 7215 | Lisp_Object tail, frame; |
d724d989 | 7216 | |
89819bdd RS |
7217 | number_of_visible_frames = 0; |
7218 | ||
35f56f96 | 7219 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 7220 | { |
5f5c8ee5 GM |
7221 | struct frame *f = XFRAME (frame); |
7222 | ||
7223 | FRAME_SAMPLE_VISIBILITY (f); | |
7224 | if (FRAME_VISIBLE_P (f)) | |
7225 | ++number_of_visible_frames; | |
7226 | clear_desired_matrices (f); | |
f82aff7c | 7227 | } |
d724d989 JB |
7228 | } |
7229 | ||
44fa5b1e | 7230 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 7231 | do_pending_window_change (1); |
a2889657 | 7232 | |
5f5c8ee5 | 7233 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 7234 | if (frame_garbaged) |
c6e89d6c | 7235 | clear_garbaged_frames (); |
a2889657 | 7236 | |
e037b9ec | 7237 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
7238 | prepare_menu_bars (); |
7239 | ||
28995e67 | 7240 | if (windows_or_buffers_changed) |
a2889657 JB |
7241 | update_mode_lines++; |
7242 | ||
538f13d4 RS |
7243 | /* Detect case that we need to write or remove a star in the mode line. */ |
7244 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
7245 | { |
7246 | w->update_mode_line = Qt; | |
7247 | if (buffer_shared > 1) | |
7248 | update_mode_lines++; | |
7249 | } | |
7250 | ||
5f5c8ee5 | 7251 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
7252 | if (!NILP (w->column_number_displayed) |
7253 | /* This alternative quickly identifies a common case | |
7254 | where no change is needed. */ | |
7255 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7256 | && XFASTINT (w->last_modified) >= MODIFF |
7257 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7258 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7259 | w->update_mode_line = Qt; | |
7260 | ||
44fa5b1e | 7261 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 7262 | |
5f5c8ee5 GM |
7263 | /* The variable buffer_shared is set in redisplay_window and |
7264 | indicates that we redisplay a buffer in different windows. See | |
7265 | there. */ | |
7266 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
7267 | |
7268 | /* If specs for an arrow have changed, do thorough redisplay | |
7269 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 7270 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 7271 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 7272 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 7273 | |
90adcf20 RS |
7274 | /* Normally the message* functions will have already displayed and |
7275 | updated the echo area, but the frame may have been trashed, or | |
7276 | the update may have been preempted, so display the echo area | |
c6e89d6c GM |
7277 | again here. Checking both message buffers captures the case that |
7278 | the echo area should be cleared. */ | |
7279 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
90adcf20 | 7280 | { |
c6e89d6c | 7281 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 7282 | must_finish = 1; |
dd2eb166 | 7283 | |
c6e89d6c GM |
7284 | if (fonts_changed_p) |
7285 | goto retry; | |
7286 | else if (window_height_changed_p) | |
7287 | { | |
7288 | consider_all_windows_p = 1; | |
7289 | ++update_mode_lines; | |
7290 | ++windows_or_buffers_changed; | |
9142dd5b GM |
7291 | |
7292 | /* If window configuration was changed, frames may have been | |
7293 | marked garbaged. Clear them or we will experience | |
7294 | surprises wrt scrolling. */ | |
7295 | if (frame_garbaged) | |
7296 | clear_garbaged_frames (); | |
c6e89d6c | 7297 | } |
90adcf20 | 7298 | } |
dd2eb166 GM |
7299 | else if (w == XWINDOW (minibuf_window) |
7300 | && (current_buffer->clip_changed | |
7301 | || XFASTINT (w->last_modified) < MODIFF | |
7302 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 7303 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
7304 | { |
7305 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
7306 | showing if its contents might have changed. */ |
7307 | must_finish = 1; | |
7308 | consider_all_windows_p = 1; | |
c6e89d6c | 7309 | ++windows_or_buffers_changed; |
dd2eb166 | 7310 | ++update_mode_lines; |
9142dd5b GM |
7311 | |
7312 | /* If window configuration was changed, frames may have been | |
7313 | marked garbaged. Clear them or we will experience | |
7314 | surprises wrt scrolling. */ | |
7315 | if (frame_garbaged) | |
7316 | clear_garbaged_frames (); | |
c6e89d6c GM |
7317 | } |
7318 | ||
90adcf20 | 7319 | |
5f5c8ee5 GM |
7320 | /* If showing the region, and mark has changed, we must redisplay |
7321 | the whole window. The assignment to this_line_start_pos prevents | |
7322 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
7323 | if (((!NILP (Vtransient_mark_mode) |
7324 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7325 | != !NILP (w->region_showing)) | |
82d04750 JB |
7326 | || (!NILP (w->region_showing) |
7327 | && !EQ (w->region_showing, | |
7328 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
7329 | CHARPOS (this_line_start_pos) = 0; |
7330 | ||
7331 | /* Optimize the case that only the line containing the cursor in the | |
7332 | selected window has changed. Variables starting with this_ are | |
7333 | set in display_line and record information about the line | |
7334 | containing the cursor. */ | |
7335 | tlbufpos = this_line_start_pos; | |
7336 | tlendpos = this_line_end_pos; | |
7337 | if (!consider_all_windows_p | |
7338 | && CHARPOS (tlbufpos) > 0 | |
7339 | && NILP (w->update_mode_line) | |
73af359d | 7340 | && !current_buffer->clip_changed |
44fa5b1e | 7341 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 7342 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 7343 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
7344 | && this_line_buffer == current_buffer |
7345 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 7346 | && NILP (w->force_start) |
5f5c8ee5 GM |
7347 | /* Point must be on the line that we have info recorded about. */ |
7348 | && PT >= CHARPOS (tlbufpos) | |
7349 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
7350 | /* All text outside that line, including its final newline, |
7351 | must be unchanged */ | |
5f5c8ee5 GM |
7352 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
7353 | CHARPOS (tlendpos))) | |
7354 | { | |
7355 | if (CHARPOS (tlbufpos) > BEGV | |
7356 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
7357 | && (CHARPOS (tlbufpos) == ZV | |
7358 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
7359 | /* Former continuation line has disappeared by becoming empty */ |
7360 | goto cancel; | |
7361 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 7362 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
7363 | || MINI_WINDOW_P (w)) |
7364 | { | |
1c9241f5 KH |
7365 | /* We have to handle the case of continuation around a |
7366 | wide-column character (See the comment in indent.c around | |
7367 | line 885). | |
7368 | ||
7369 | For instance, in the following case: | |
7370 | ||
7371 | -------- Insert -------- | |
7372 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
7373 | J_I_ ==> J_I_ `^^' are cursors. | |
7374 | ^^ ^^ | |
7375 | -------- -------- | |
7376 | ||
7377 | As we have to redraw the line above, we should goto cancel. */ | |
7378 | ||
5f5c8ee5 GM |
7379 | struct it it; |
7380 | int line_height_before = this_line_pixel_height; | |
7381 | ||
7382 | /* Note that start_display will handle the case that the | |
7383 | line starting at tlbufpos is a continuation lines. */ | |
7384 | start_display (&it, w, tlbufpos); | |
7385 | ||
7386 | /* Implementation note: It this still necessary? */ | |
7387 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
7388 | goto cancel; |
7389 | ||
5f5c8ee5 GM |
7390 | TRACE ((stderr, "trying display optimization 1\n")); |
7391 | w->cursor.vpos = -1; | |
a2889657 | 7392 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
7393 | it.vpos = this_line_vpos; |
7394 | it.current_y = this_line_y; | |
7395 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
7396 | display_line (&it); | |
7397 | ||
a2889657 | 7398 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
7399 | and ends at same distance from eob as before, we win */ |
7400 | if (w->cursor.vpos >= 0 | |
7401 | /* Line is not continued, otherwise this_line_start_pos | |
7402 | would have been set to 0 in display_line. */ | |
7403 | && CHARPOS (this_line_start_pos) | |
7404 | /* Line ends as before. */ | |
7405 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
7406 | /* Line has same height as before. Otherwise other lines | |
7407 | would have to be shifted up or down. */ | |
7408 | && this_line_pixel_height == line_height_before) | |
a2889657 | 7409 | { |
5f5c8ee5 GM |
7410 | /* If this is not the window's last line, we must adjust |
7411 | the charstarts of the lines below. */ | |
7412 | if (it.current_y < it.last_visible_y) | |
7413 | { | |
7414 | struct glyph_row *row | |
7415 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
7416 | int delta, delta_bytes; | |
7417 | ||
7418 | if (Z - CHARPOS (tlendpos) == ZV) | |
7419 | { | |
7420 | /* This line ends at end of (accessible part of) | |
7421 | buffer. There is no newline to count. */ | |
7422 | delta = (Z | |
7423 | - CHARPOS (tlendpos) | |
7424 | - MATRIX_ROW_START_CHARPOS (row)); | |
7425 | delta_bytes = (Z_BYTE | |
7426 | - BYTEPOS (tlendpos) | |
7427 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7428 | } | |
7429 | else | |
7430 | { | |
7431 | /* This line ends in a newline. Must take | |
7432 | account of the newline and the rest of the | |
7433 | text that follows. */ | |
7434 | delta = (Z | |
7435 | - CHARPOS (tlendpos) | |
7436 | - MATRIX_ROW_START_CHARPOS (row)); | |
7437 | delta_bytes = (Z_BYTE | |
7438 | - BYTEPOS (tlendpos) | |
7439 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7440 | } | |
7441 | ||
7442 | increment_glyph_matrix_buffer_positions (w->current_matrix, | |
7443 | this_line_vpos + 1, | |
7444 | w->current_matrix->nrows, | |
7445 | delta, delta_bytes); | |
85bcef6c | 7446 | } |
46db8486 | 7447 | |
5f5c8ee5 GM |
7448 | /* If this row displays text now but previously didn't, |
7449 | or vice versa, w->window_end_vpos may have to be | |
7450 | adjusted. */ | |
7451 | if ((it.glyph_row - 1)->displays_text_p) | |
7452 | { | |
7453 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
7454 | XSETINT (w->window_end_vpos, this_line_vpos); | |
7455 | } | |
7456 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
7457 | && this_line_vpos > 0) | |
7458 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
7459 | w->window_end_valid = Qnil; | |
7460 | ||
7461 | /* Update hint: No need to try to scroll in update_window. */ | |
7462 | w->desired_matrix->no_scrolling_p = 1; | |
7463 | ||
7464 | #if GLYPH_DEBUG | |
7465 | *w->desired_matrix->method = 0; | |
7466 | debug_method_add (w, "optimization 1"); | |
7467 | #endif | |
a2889657 JB |
7468 | goto update; |
7469 | } | |
7470 | else | |
7471 | goto cancel; | |
7472 | } | |
5f5c8ee5 GM |
7473 | else if (/* Cursor position hasn't changed. */ |
7474 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
7475 | /* Make sure the cursor was last displayed |
7476 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
7477 | && 0 <= w->cursor.vpos |
7478 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
7479 | { |
7480 | if (!must_finish) | |
7481 | { | |
c6e89d6c | 7482 | do_pending_window_change (1); |
5f5c8ee5 GM |
7483 | |
7484 | /* We used to always goto end_of_redisplay here, but this | |
7485 | isn't enough if we have a blinking cursor. */ | |
7486 | if (w->cursor_off_p == w->last_cursor_off_p) | |
7487 | goto end_of_redisplay; | |
a2889657 JB |
7488 | } |
7489 | goto update; | |
7490 | } | |
8b51f1e3 KH |
7491 | /* If highlighting the region, or if the cursor is in the echo area, |
7492 | then we can't just move the cursor. */ | |
bd66d1ba RS |
7493 | else if (! (!NILP (Vtransient_mark_mode) |
7494 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
7495 | && (w == XWINDOW (current_buffer->last_selected_window) |
7496 | || highlight_nonselected_windows) | |
8b51f1e3 | 7497 | && NILP (w->region_showing) |
8f897821 | 7498 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 7499 | && !cursor_in_echo_area) |
a2889657 | 7500 | { |
5f5c8ee5 GM |
7501 | struct it it; |
7502 | struct glyph_row *row; | |
7503 | ||
7504 | /* Skip from tlbufpos to PT and see where it is. Note that | |
7505 | PT may be in invisible text. If so, we will end at the | |
7506 | next visible position. */ | |
7507 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
7508 | NULL, DEFAULT_FACE_ID); | |
7509 | it.current_x = this_line_start_x; | |
7510 | it.current_y = this_line_y; | |
7511 | it.vpos = this_line_vpos; | |
7512 | ||
7513 | /* The call to move_it_to stops in front of PT, but | |
7514 | moves over before-strings. */ | |
7515 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
7516 | ||
7517 | if (it.vpos == this_line_vpos | |
7518 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
7519 | row->enabled_p)) | |
a2889657 | 7520 | { |
5f5c8ee5 GM |
7521 | xassert (this_line_vpos == it.vpos); |
7522 | xassert (this_line_y == it.current_y); | |
7523 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
7524 | goto update; |
7525 | } | |
7526 | else | |
7527 | goto cancel; | |
7528 | } | |
5f5c8ee5 | 7529 | |
a2889657 | 7530 | cancel: |
5f5c8ee5 GM |
7531 | /* Text changed drastically or point moved off of line. */ |
7532 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
7533 | } |
7534 | ||
5f5c8ee5 GM |
7535 | CHARPOS (this_line_start_pos) = 0; |
7536 | consider_all_windows_p |= buffer_shared > 1; | |
7537 | ++clear_face_cache_count; | |
a2889657 | 7538 | |
5f5c8ee5 GM |
7539 | |
7540 | /* Build desired matrices. If consider_all_windows_p is non-zero, | |
7541 | do it for all windows on all frames. Otherwise do it for | |
7542 | selected_window, only. */ | |
463f6b91 | 7543 | |
5f5c8ee5 | 7544 | if (consider_all_windows_p) |
a2889657 | 7545 | { |
35f56f96 | 7546 | Lisp_Object tail, frame; |
a2889657 | 7547 | |
5f5c8ee5 GM |
7548 | /* Clear the face cache eventually. */ |
7549 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 7550 | { |
5f5c8ee5 | 7551 | clear_face_cache (0); |
463f6b91 RS |
7552 | clear_face_cache_count = 0; |
7553 | } | |
31b24551 | 7554 | |
5f5c8ee5 GM |
7555 | /* Recompute # windows showing selected buffer. This will be |
7556 | incremented each time such a window is displayed. */ | |
a2889657 JB |
7557 | buffer_shared = 0; |
7558 | ||
35f56f96 | 7559 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 7560 | { |
5f5c8ee5 | 7561 | struct frame *f = XFRAME (frame); |
886bd6f2 | 7562 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 7563 | { |
5f5c8ee5 GM |
7564 | /* Mark all the scroll bars to be removed; we'll redeem |
7565 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
7566 | if (condemn_scroll_bars_hook) |
7567 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 7568 | |
f21ef775 | 7569 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 7570 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 7571 | |
5f5c8ee5 GM |
7572 | /* Any scroll bars which redisplay_windows should have |
7573 | nuked should now go away. */ | |
9769686d RS |
7574 | if (judge_scroll_bars_hook) |
7575 | (*judge_scroll_bars_hook) (f); | |
7576 | } | |
30c566e4 | 7577 | } |
a2889657 | 7578 | } |
886bd6f2 GM |
7579 | else if (FRAME_VISIBLE_P (sf) |
7580 | && !FRAME_OBSCURED_P (sf)) | |
5f5c8ee5 GM |
7581 | redisplay_window (selected_window, 1); |
7582 | ||
7583 | ||
7584 | /* Compare desired and current matrices, perform output. */ | |
7585 | ||
7586 | update: | |
7587 | ||
7588 | /* If fonts changed, display again. */ | |
7589 | if (fonts_changed_p) | |
7590 | goto retry; | |
a2889657 | 7591 | |
a2889657 JB |
7592 | /* Prevent various kinds of signals during display update. |
7593 | stdio is not robust about handling signals, | |
7594 | which can cause an apparent I/O error. */ | |
7595 | if (interrupt_input) | |
7596 | unrequest_sigio (); | |
7597 | stop_polling (); | |
7598 | ||
5f5c8ee5 | 7599 | if (consider_all_windows_p) |
a2889657 JB |
7600 | { |
7601 | Lisp_Object tail; | |
92a90e89 GM |
7602 | struct frame *f; |
7603 | int hscrolled_p; | |
a2889657 JB |
7604 | |
7605 | pause = 0; | |
92a90e89 | 7606 | hscrolled_p = 0; |
a2889657 | 7607 | |
92a90e89 | 7608 | /* See if we have to hscroll. */ |
9472f927 | 7609 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
92a90e89 GM |
7610 | if (FRAMEP (XCAR (tail))) |
7611 | { | |
7612 | f = XFRAME (XCAR (tail)); | |
7613 | ||
7614 | if ((FRAME_WINDOW_P (f) | |
886bd6f2 | 7615 | || f == sf) |
92a90e89 GM |
7616 | && FRAME_VISIBLE_P (f) |
7617 | && !FRAME_OBSCURED_P (f) | |
7618 | && hscroll_windows (f->root_window)) | |
7619 | hscrolled_p = 1; | |
7620 | } | |
7621 | ||
7622 | if (hscrolled_p) | |
7623 | goto retry; | |
a2889657 | 7624 | |
92a90e89 GM |
7625 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
7626 | { | |
9472f927 | 7627 | if (!FRAMEP (XCAR (tail))) |
a2889657 JB |
7628 | continue; |
7629 | ||
9472f927 | 7630 | f = XFRAME (XCAR (tail)); |
1af9f229 | 7631 | |
886bd6f2 | 7632 | if ((FRAME_WINDOW_P (f) || f == sf) |
f21ef775 | 7633 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 7634 | { |
5f5c8ee5 GM |
7635 | /* Mark all windows as to be updated. */ |
7636 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
44fa5b1e | 7637 | pause |= update_frame (f, 0, 0); |
a2889657 | 7638 | if (!pause) |
efc63ef0 RS |
7639 | { |
7640 | mark_window_display_accurate (f->root_window, 1); | |
7641 | if (frame_up_to_date_hook != 0) | |
7642 | (*frame_up_to_date_hook) (f); | |
7643 | } | |
a2889657 JB |
7644 | } |
7645 | } | |
7646 | } | |
7647 | else | |
6e8290aa | 7648 | { |
886bd6f2 GM |
7649 | if (FRAME_VISIBLE_P (sf) |
7650 | && !FRAME_OBSCURED_P (sf)) | |
5f5c8ee5 | 7651 | { |
92a90e89 GM |
7652 | if (hscroll_windows (selected_window)) |
7653 | goto retry; | |
7654 | ||
5f5c8ee5 | 7655 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 7656 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 7657 | } |
4d641a15 KH |
7658 | else |
7659 | pause = 0; | |
d724d989 | 7660 | |
8de2d90b | 7661 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
7662 | function. If the echo area is on another frame, that may |
7663 | have put text on a frame other than the selected one, so the | |
7664 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
7665 | it here. */ |
7666 | { | |
84faf44c | 7667 | Lisp_Object mini_window; |
5f5c8ee5 | 7668 | struct frame *mini_frame; |
84faf44c | 7669 | |
886bd6f2 | 7670 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
84faf44c | 7671 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
8de2d90b | 7672 | |
886bd6f2 | 7673 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
5f5c8ee5 GM |
7674 | { |
7675 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
7676 | pause |= update_frame (mini_frame, 0, 0); | |
7677 | if (!pause && hscroll_windows (mini_window)) | |
7678 | goto retry; | |
7679 | } | |
8de2d90b | 7680 | } |
6e8290aa | 7681 | } |
a2889657 | 7682 | |
5f5c8ee5 GM |
7683 | /* If display was paused because of pending input, make sure we do a |
7684 | thorough update the next time. */ | |
a2889657 JB |
7685 | if (pause) |
7686 | { | |
5f5c8ee5 GM |
7687 | /* Prevent the optimization at the beginning of |
7688 | redisplay_internal that tries a single-line update of the | |
7689 | line containing the cursor in the selected window. */ | |
7690 | CHARPOS (this_line_start_pos) = 0; | |
7691 | ||
7692 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 7693 | if (!NILP (last_arrow_position)) |
a2889657 JB |
7694 | { |
7695 | last_arrow_position = Qt; | |
7696 | last_arrow_string = Qt; | |
7697 | } | |
5f5c8ee5 GM |
7698 | |
7699 | /* If we pause after scrolling, some rows in the current | |
7700 | matrices of some windows are not valid. */ | |
7701 | if (!WINDOW_FULL_WIDTH_P (w) | |
7702 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
7703 | update_mode_lines = 1; |
7704 | } | |
7705 | ||
5f5c8ee5 GM |
7706 | /* Now text on frame agrees with windows, so put info into the |
7707 | windows for partial redisplay to follow. */ | |
a2889657 JB |
7708 | if (!pause) |
7709 | { | |
7710 | register struct buffer *b = XBUFFER (w->buffer); | |
7711 | ||
9142dd5b GM |
7712 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); |
7713 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
7714 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
7715 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
a2889657 | 7716 | |
5f5c8ee5 | 7717 | if (consider_all_windows_p) |
886bd6f2 | 7718 | mark_window_display_accurate (FRAME_ROOT_WINDOW (sf), 1); |
a2889657 JB |
7719 | else |
7720 | { | |
5f5c8ee5 GM |
7721 | XSETFASTINT (w->last_point, BUF_PT (b)); |
7722 | w->last_cursor = w->cursor; | |
7723 | w->last_cursor_off_p = w->cursor_off_p; | |
7724 | ||
28995e67 | 7725 | b->clip_changed = 0; |
9142dd5b | 7726 | b->prevent_redisplay_optimizations_p = 0; |
a2889657 | 7727 | w->update_mode_line = Qnil; |
c2213350 | 7728 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 7729 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
7730 | w->last_had_star |
7731 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7732 | ? Qt : Qnil); | |
3ee4159a RS |
7733 | |
7734 | /* Record if we are showing a region, so can make sure to | |
7735 | update it fully at next redisplay. */ | |
7736 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
7737 | && (w == XWINDOW (current_buffer->last_selected_window) |
7738 | || highlight_nonselected_windows) | |
3ee4159a RS |
7739 | && !NILP (XBUFFER (w->buffer)->mark_active) |
7740 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
7741 | : Qnil); | |
7742 | ||
d2f84654 | 7743 | w->window_end_valid = w->buffer; |
d45de95b | 7744 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 7745 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 | 7746 | if (frame_up_to_date_hook != 0) |
886bd6f2 | 7747 | (*frame_up_to_date_hook) (sf); |
9142dd5b GM |
7748 | |
7749 | w->current_matrix->buffer = b; | |
7750 | w->current_matrix->begv = BUF_BEGV (b); | |
7751 | w->current_matrix->zv = BUF_ZV (b); | |
a2889657 | 7752 | } |
15e26c76 | 7753 | |
a2889657 JB |
7754 | update_mode_lines = 0; |
7755 | windows_or_buffers_changed = 0; | |
7756 | } | |
7757 | ||
5f5c8ee5 GM |
7758 | /* Start SIGIO interrupts coming again. Having them off during the |
7759 | code above makes it less likely one will discard output, but not | |
7760 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 7761 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
7762 | if (interrupt_input) |
7763 | request_sigio (); | |
7764 | start_polling (); | |
7765 | ||
5f5c8ee5 GM |
7766 | /* If a frame has become visible which was not before, redisplay |
7767 | again, so that we display it. Expose events for such a frame | |
7768 | (which it gets when becoming visible) don't call the parts of | |
7769 | redisplay constructing glyphs, so simply exposing a frame won't | |
7770 | display anything in this case. So, we have to display these | |
7771 | frames here explicitly. */ | |
11c52c4f RS |
7772 | if (!pause) |
7773 | { | |
7774 | Lisp_Object tail, frame; | |
7775 | int new_count = 0; | |
7776 | ||
7777 | FOR_EACH_FRAME (tail, frame) | |
7778 | { | |
7779 | int this_is_visible = 0; | |
8e83f802 RS |
7780 | |
7781 | if (XFRAME (frame)->visible) | |
7782 | this_is_visible = 1; | |
7783 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
7784 | if (XFRAME (frame)->visible) | |
7785 | this_is_visible = 1; | |
11c52c4f RS |
7786 | |
7787 | if (this_is_visible) | |
7788 | new_count++; | |
7789 | } | |
7790 | ||
89819bdd | 7791 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
7792 | windows_or_buffers_changed++; |
7793 | } | |
7794 | ||
44fa5b1e | 7795 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 7796 | do_pending_window_change (1); |
d8e242fd | 7797 | |
8b32d885 RS |
7798 | /* If we just did a pending size change, or have additional |
7799 | visible frames, redisplay again. */ | |
3c8c72e0 | 7800 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 7801 | goto retry; |
5f5c8ee5 GM |
7802 | |
7803 | end_of_redisplay:; | |
c6e89d6c | 7804 | |
28514cd9 | 7805 | unbind_to (count, Qnil); |
a2889657 JB |
7806 | } |
7807 | ||
5f5c8ee5 GM |
7808 | |
7809 | /* Redisplay, but leave alone any recent echo area message unless | |
7810 | another message has been requested in its place. | |
a2889657 JB |
7811 | |
7812 | This is useful in situations where you need to redisplay but no | |
7813 | user action has occurred, making it inappropriate for the message | |
7814 | area to be cleared. See tracking_off and | |
7815 | wait_reading_process_input for examples of these situations. */ | |
7816 | ||
8991bb31 | 7817 | void |
a2889657 JB |
7818 | redisplay_preserve_echo_area () |
7819 | { | |
c6e89d6c | 7820 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 7821 | { |
c6e89d6c GM |
7822 | /* We have a previously displayed message, but no current |
7823 | message. Redisplay the previous message. */ | |
7824 | display_last_displayed_message_p = 1; | |
e9874cee | 7825 | redisplay_internal (1); |
c6e89d6c | 7826 | display_last_displayed_message_p = 0; |
a2889657 JB |
7827 | } |
7828 | else | |
e9874cee | 7829 | redisplay_internal (1); |
a2889657 JB |
7830 | } |
7831 | ||
5f5c8ee5 | 7832 | |
28514cd9 GM |
7833 | /* Function registered with record_unwind_protect in |
7834 | redisplay_internal. Clears the flag indicating that a redisplay is | |
7835 | in progress. */ | |
7836 | ||
7837 | static Lisp_Object | |
7838 | unwind_redisplay (old_redisplaying_p) | |
7839 | Lisp_Object old_redisplaying_p; | |
7840 | { | |
7841 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 7842 | return Qnil; |
28514cd9 GM |
7843 | } |
7844 | ||
7845 | ||
5f5c8ee5 GM |
7846 | /* Mark the display of windows in the window tree rooted at WINDOW as |
7847 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
7848 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
7849 | the next time redisplay_internal is called. */ | |
7850 | ||
a2889657 | 7851 | void |
5f5c8ee5 | 7852 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 7853 | Lisp_Object window; |
5f5c8ee5 | 7854 | int accurate_p; |
a2889657 | 7855 | { |
5f5c8ee5 GM |
7856 | struct window *w; |
7857 | ||
7858 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
7859 | { |
7860 | w = XWINDOW (window); | |
7861 | ||
5f5c8ee5 | 7862 | if (BUFFERP (w->buffer)) |
bd66d1ba | 7863 | { |
5f5c8ee5 GM |
7864 | struct buffer *b = XBUFFER (w->buffer); |
7865 | ||
c2213350 | 7866 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 7867 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 7868 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
7869 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
7870 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
7871 | ? Qt : Qnil); | |
bd66d1ba | 7872 | |
5f5c8ee5 GM |
7873 | #if 0 /* I don't think this is necessary because display_line does it. |
7874 | Let's check it. */ | |
bd66d1ba RS |
7875 | /* Record if we are showing a region, so can make sure to |
7876 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
7877 | w->region_showing |
7878 | = (!NILP (Vtransient_mark_mode) | |
7879 | && (w == XWINDOW (current_buffer->last_selected_window) | |
7880 | || highlight_nonselected_windows) | |
7881 | && (!NILP (b->mark_active) | |
7882 | ? Fmarker_position (b->mark) | |
7883 | : Qnil)); | |
7884 | #endif | |
7885 | ||
7886 | if (accurate_p) | |
7887 | { | |
7888 | b->clip_changed = 0; | |
9142dd5b GM |
7889 | b->prevent_redisplay_optimizations_p = 0; |
7890 | w->current_matrix->buffer = b; | |
7891 | w->current_matrix->begv = BUF_BEGV (b); | |
7892 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 GM |
7893 | w->last_cursor = w->cursor; |
7894 | w->last_cursor_off_p = w->cursor_off_p; | |
7895 | if (w == XWINDOW (selected_window)) | |
7896 | w->last_point = BUF_PT (b); | |
7897 | else | |
7898 | w->last_point = XMARKER (w->pointm)->charpos; | |
7899 | } | |
bd66d1ba RS |
7900 | } |
7901 | ||
d2f84654 | 7902 | w->window_end_valid = w->buffer; |
a2889657 JB |
7903 | w->update_mode_line = Qnil; |
7904 | ||
265a9e55 | 7905 | if (!NILP (w->vchild)) |
5f5c8ee5 | 7906 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 7907 | if (!NILP (w->hchild)) |
5f5c8ee5 | 7908 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
7909 | } |
7910 | ||
5f5c8ee5 | 7911 | if (accurate_p) |
a2889657 | 7912 | { |
d45de95b | 7913 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
7914 | last_arrow_string = Voverlay_arrow_string; |
7915 | } | |
7916 | else | |
7917 | { | |
5f5c8ee5 GM |
7918 | /* Force a thorough redisplay the next time by setting |
7919 | last_arrow_position and last_arrow_string to t, which is | |
7920 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
7921 | last_arrow_position = Qt; |
7922 | last_arrow_string = Qt; | |
7923 | } | |
7924 | } | |
5f5c8ee5 GM |
7925 | |
7926 | ||
7927 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
7928 | C. Since a display table doesn't have any parent, we don't have to | |
7929 | follow parent. Do not call this function directly but use the | |
7930 | macro DISP_CHAR_VECTOR. */ | |
7931 | ||
7932 | Lisp_Object | |
7933 | disp_char_vector (dp, c) | |
7934 | struct Lisp_Char_Table *dp; | |
7935 | int c; | |
7936 | { | |
7937 | int code[4], i; | |
7938 | Lisp_Object val; | |
7939 | ||
7940 | if (SINGLE_BYTE_CHAR_P (c)) | |
7941 | return (dp->contents[c]); | |
7942 | ||
7943 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
260a86a0 KH |
7944 | if (code[1] < 32) |
7945 | code[1] = -1; | |
7946 | else if (code[2] < 32) | |
7947 | code[2] = -1; | |
5f5c8ee5 GM |
7948 | |
7949 | /* Here, the possible range of code[0] (== charset ID) is | |
7950 | 128..max_charset. Since the top level char table contains data | |
7951 | for multibyte characters after 256th element, we must increment | |
7952 | code[0] by 128 to get a correct index. */ | |
7953 | code[0] += 128; | |
7954 | code[3] = -1; /* anchor */ | |
7955 | ||
7956 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
7957 | { | |
7958 | val = dp->contents[code[i]]; | |
7959 | if (!SUB_CHAR_TABLE_P (val)) | |
7960 | return (NILP (val) ? dp->defalt : val); | |
7961 | } | |
7962 | ||
7963 | /* Here, val is a sub char table. We return the default value of | |
7964 | it. */ | |
7965 | return (dp->defalt); | |
7966 | } | |
7967 | ||
7968 | ||
a2889657 | 7969 | \f |
5f5c8ee5 GM |
7970 | /*********************************************************************** |
7971 | Window Redisplay | |
7972 | ***********************************************************************/ | |
a2725ab2 | 7973 | |
5f5c8ee5 | 7974 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
7975 | |
7976 | static void | |
5f5c8ee5 GM |
7977 | redisplay_windows (window) |
7978 | Lisp_Object window; | |
90adcf20 | 7979 | { |
5f5c8ee5 GM |
7980 | while (!NILP (window)) |
7981 | { | |
7982 | struct window *w = XWINDOW (window); | |
7983 | ||
7984 | if (!NILP (w->hchild)) | |
7985 | redisplay_windows (w->hchild); | |
7986 | else if (!NILP (w->vchild)) | |
7987 | redisplay_windows (w->vchild); | |
7988 | else | |
7989 | redisplay_window (window, 0); | |
a2725ab2 | 7990 | |
5f5c8ee5 GM |
7991 | window = w->next; |
7992 | } | |
7993 | } | |
7994 | ||
7995 | ||
7996 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
7997 | DELTA is the number of bytes by which positions recorded in ROW | |
7998 | differ from current buffer positions. */ | |
7999 | ||
8000 | void | |
8001 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
8002 | struct window *w; | |
8003 | struct glyph_row *row; | |
8004 | struct glyph_matrix *matrix; | |
8005 | int delta, delta_bytes, dy, dvpos; | |
8006 | { | |
8007 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
8008 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
8009 | int x = row->x; | |
8010 | int pt_old = PT - delta; | |
8011 | ||
8012 | /* Skip over glyphs not having an object at the start of the row. | |
8013 | These are special glyphs like truncation marks on terminal | |
8014 | frames. */ | |
8015 | if (row->displays_text_p) | |
8016 | while (glyph < end | |
8017 | && !glyph->object | |
8018 | && glyph->charpos < 0) | |
8019 | { | |
8020 | x += glyph->pixel_width; | |
8021 | ++glyph; | |
8022 | } | |
8023 | ||
8024 | while (glyph < end | |
8025 | && glyph->object | |
8026 | && (!BUFFERP (glyph->object) | |
8027 | || glyph->charpos < pt_old)) | |
8028 | { | |
8029 | x += glyph->pixel_width; | |
8030 | ++glyph; | |
8031 | } | |
8032 | ||
8033 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
8034 | w->cursor.x = x; | |
8035 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
8036 | w->cursor.y = row->y + dy; | |
8037 | ||
8038 | if (w == XWINDOW (selected_window)) | |
8039 | { | |
8040 | if (!row->continued_p | |
8041 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
8042 | && row->x == 0) | |
8043 | { | |
8044 | this_line_buffer = XBUFFER (w->buffer); | |
8045 | ||
8046 | CHARPOS (this_line_start_pos) | |
8047 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
8048 | BYTEPOS (this_line_start_pos) | |
8049 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
8050 | ||
8051 | CHARPOS (this_line_end_pos) | |
8052 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
8053 | BYTEPOS (this_line_end_pos) | |
8054 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
8055 | ||
8056 | this_line_y = w->cursor.y; | |
8057 | this_line_pixel_height = row->height; | |
8058 | this_line_vpos = w->cursor.vpos; | |
8059 | this_line_start_x = row->x; | |
8060 | } | |
8061 | else | |
8062 | CHARPOS (this_line_start_pos) = 0; | |
8063 | } | |
8064 | } | |
8065 | ||
8066 | ||
8067 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
8068 | start STARTP. Sets the window start of WINDOW to that position. |
8069 | ||
8070 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
8071 | |
8072 | static INLINE struct text_pos | |
8073 | run_window_scroll_functions (window, startp) | |
8074 | Lisp_Object window; | |
8075 | struct text_pos startp; | |
8076 | { | |
8077 | struct window *w = XWINDOW (window); | |
8078 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
8079 | |
8080 | if (current_buffer != XBUFFER (w->buffer)) | |
8081 | abort (); | |
8082 | ||
5f5c8ee5 GM |
8083 | if (!NILP (Vwindow_scroll_functions)) |
8084 | { | |
8085 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
8086 | make_number (CHARPOS (startp))); | |
8087 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
8088 | /* In case the hook functions switch buffers. */ |
8089 | if (current_buffer != XBUFFER (w->buffer)) | |
8090 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8091 | } |
90adcf20 | 8092 | |
5f5c8ee5 GM |
8093 | return startp; |
8094 | } | |
8095 | ||
8096 | ||
8097 | /* Modify the desired matrix of window W and W->vscroll so that the | |
8098 | line containing the cursor is fully visible. */ | |
8099 | ||
8100 | static void | |
8101 | make_cursor_line_fully_visible (w) | |
8102 | struct window *w; | |
8103 | { | |
8104 | struct glyph_matrix *matrix; | |
8105 | struct glyph_row *row; | |
045dee35 | 8106 | int header_line_height; |
5f5c8ee5 GM |
8107 | |
8108 | /* It's not always possible to find the cursor, e.g, when a window | |
8109 | is full of overlay strings. Don't do anything in that case. */ | |
8110 | if (w->cursor.vpos < 0) | |
8111 | return; | |
8112 | ||
8113 | matrix = w->desired_matrix; | |
8114 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
8115 | ||
8116 | /* If row->y == top y of window display area, the window isn't tall | |
8117 | enough to display a single line. There is nothing we can do | |
8118 | about it. */ | |
045dee35 GM |
8119 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
8120 | if (row->y == header_line_height) | |
5f5c8ee5 GM |
8121 | return; |
8122 | ||
8123 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
8124 | { | |
8125 | int dy = row->height - row->visible_height; | |
8126 | w->vscroll = 0; | |
8127 | w->cursor.y += dy; | |
8128 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
8129 | } | |
8130 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) | |
8131 | { | |
8132 | int dy = - (row->height - row->visible_height); | |
8133 | w->vscroll = dy; | |
8134 | w->cursor.y += dy; | |
8135 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
8136 | } | |
8137 | ||
8138 | /* When we change the cursor y-position of the selected window, | |
8139 | change this_line_y as well so that the display optimization for | |
8140 | the cursor line of the selected window in redisplay_internal uses | |
8141 | the correct y-position. */ | |
8142 | if (w == XWINDOW (selected_window)) | |
8143 | this_line_y = w->cursor.y; | |
8144 | } | |
8145 | ||
8146 | ||
8147 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
8148 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
8149 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
8150 | in redisplay_window to bring a partially visible line into view in | |
8151 | the case that only the cursor has moved. | |
8152 | ||
8153 | Value is | |
8154 | ||
8155 | 1 if scrolling succeeded | |
8156 | ||
8157 | 0 if scrolling didn't find point. | |
8158 | ||
8159 | -1 if new fonts have been loaded so that we must interrupt | |
8160 | redisplay, adjust glyph matrices, and try again. */ | |
8161 | ||
8162 | static int | |
8163 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
8164 | scroll_step, temp_scroll_step) | |
8165 | Lisp_Object window; | |
8166 | int just_this_one_p; | |
8167 | int scroll_conservatively, scroll_step; | |
8168 | int temp_scroll_step; | |
8169 | { | |
8170 | struct window *w = XWINDOW (window); | |
8171 | struct frame *f = XFRAME (w->frame); | |
8172 | struct text_pos scroll_margin_pos; | |
8173 | struct text_pos pos; | |
8174 | struct text_pos startp; | |
8175 | struct it it; | |
8176 | Lisp_Object window_end; | |
8177 | int this_scroll_margin; | |
8178 | int dy = 0; | |
8179 | int scroll_max; | |
8180 | int line_height, rc; | |
8181 | int amount_to_scroll = 0; | |
8182 | Lisp_Object aggressive; | |
8183 | int height; | |
8184 | ||
8185 | #if GLYPH_DEBUG | |
8186 | debug_method_add (w, "try_scrolling"); | |
78614721 | 8187 | #endif |
5f5c8ee5 GM |
8188 | |
8189 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
8190 | ||
8191 | /* Compute scroll margin height in pixels. We scroll when point is | |
8192 | within this distance from the top or bottom of the window. */ | |
8193 | if (scroll_margin > 0) | |
90adcf20 | 8194 | { |
5f5c8ee5 GM |
8195 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
8196 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8197 | } | |
8198 | else | |
8199 | this_scroll_margin = 0; | |
8200 | ||
8201 | /* Compute how much we should try to scroll maximally to bring point | |
8202 | into view. */ | |
8203 | if (scroll_step) | |
8204 | scroll_max = scroll_step; | |
8205 | else if (scroll_conservatively) | |
8206 | scroll_max = scroll_conservatively; | |
8207 | else if (temp_scroll_step) | |
8208 | scroll_max = temp_scroll_step; | |
8209 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
8210 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
8211 | /* We're trying to scroll because of aggressive scrolling | |
8212 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
8213 | there should be a variable for this. */ | |
8214 | scroll_max = 10; | |
8215 | else | |
8216 | scroll_max = 0; | |
8217 | scroll_max *= CANON_Y_UNIT (f); | |
8218 | ||
8219 | /* Decide whether we have to scroll down. Start at the window end | |
8220 | and move this_scroll_margin up to find the position of the scroll | |
8221 | margin. */ | |
8222 | window_end = Fwindow_end (window, Qt); | |
8223 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
8224 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
8225 | if (this_scroll_margin) | |
8226 | { | |
8227 | start_display (&it, w, scroll_margin_pos); | |
8228 | move_it_vertically (&it, - this_scroll_margin); | |
8229 | scroll_margin_pos = it.current.pos; | |
8230 | } | |
8231 | ||
8232 | if (PT >= CHARPOS (scroll_margin_pos)) | |
8233 | { | |
8234 | int y0; | |
8235 | ||
8236 | /* Point is in the scroll margin at the bottom of the window, or | |
8237 | below. Compute a new window start that makes point visible. */ | |
8238 | ||
8239 | /* Compute the distance from the scroll margin to PT. | |
8240 | Give up if the distance is greater than scroll_max. */ | |
8241 | start_display (&it, w, scroll_margin_pos); | |
8242 | y0 = it.current_y; | |
8243 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8244 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8245 | line_height = (it.max_ascent + it.max_descent | |
8246 | ? it.max_ascent + it.max_descent | |
8247 | : last_height); | |
8248 | dy = it.current_y + line_height - y0; | |
8249 | if (dy > scroll_max) | |
8250 | return 0; | |
8251 | ||
8252 | /* Move the window start down. If scrolling conservatively, | |
8253 | move it just enough down to make point visible. If | |
8254 | scroll_step is set, move it down by scroll_step. */ | |
8255 | start_display (&it, w, startp); | |
8256 | ||
8257 | if (scroll_conservatively) | |
8258 | amount_to_scroll = dy; | |
8259 | else if (scroll_step || temp_scroll_step) | |
8260 | amount_to_scroll = scroll_max; | |
8261 | else | |
90adcf20 | 8262 | { |
5f5c8ee5 GM |
8263 | aggressive = current_buffer->scroll_down_aggressively; |
8264 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8265 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8266 | if (NUMBERP (aggressive)) |
8267 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8268 | } | |
a2725ab2 | 8269 | |
5f5c8ee5 GM |
8270 | if (amount_to_scroll <= 0) |
8271 | return 0; | |
a2725ab2 | 8272 | |
5f5c8ee5 GM |
8273 | move_it_vertically (&it, amount_to_scroll); |
8274 | startp = it.current.pos; | |
8275 | } | |
8276 | else | |
8277 | { | |
8278 | /* See if point is inside the scroll margin at the top of the | |
8279 | window. */ | |
8280 | scroll_margin_pos = startp; | |
8281 | if (this_scroll_margin) | |
8282 | { | |
8283 | start_display (&it, w, startp); | |
8284 | move_it_vertically (&it, this_scroll_margin); | |
8285 | scroll_margin_pos = it.current.pos; | |
8286 | } | |
8287 | ||
8288 | if (PT < CHARPOS (scroll_margin_pos)) | |
8289 | { | |
8290 | /* Point is in the scroll margin at the top of the window or | |
8291 | above what is displayed in the window. */ | |
8292 | int y0; | |
8293 | ||
8294 | /* Compute the vertical distance from PT to the scroll | |
8295 | margin position. Give up if distance is greater than | |
8296 | scroll_max. */ | |
8297 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
8298 | start_display (&it, w, pos); | |
8299 | y0 = it.current_y; | |
8300 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
8301 | it.last_visible_y, -1, | |
8302 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8303 | dy = it.current_y - y0; | |
8304 | if (dy > scroll_max) | |
8305 | return 0; | |
8306 | ||
8307 | /* Compute new window start. */ | |
8308 | start_display (&it, w, startp); | |
8309 | ||
8310 | if (scroll_conservatively) | |
8311 | amount_to_scroll = dy; | |
8312 | else if (scroll_step || temp_scroll_step) | |
8313 | amount_to_scroll = scroll_max; | |
538f13d4 | 8314 | else |
5f5c8ee5 GM |
8315 | { |
8316 | aggressive = current_buffer->scroll_up_aggressively; | |
8317 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8318 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8319 | if (NUMBERP (aggressive)) |
8320 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8321 | } | |
a2725ab2 | 8322 | |
5f5c8ee5 GM |
8323 | if (amount_to_scroll <= 0) |
8324 | return 0; | |
8325 | ||
8326 | move_it_vertically (&it, - amount_to_scroll); | |
8327 | startp = it.current.pos; | |
90adcf20 RS |
8328 | } |
8329 | } | |
a2889657 | 8330 | |
5f5c8ee5 GM |
8331 | /* Run window scroll functions. */ |
8332 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 8333 | |
5f5c8ee5 GM |
8334 | /* Display the window. Give up if new fonts are loaded, or if point |
8335 | doesn't appear. */ | |
8336 | if (!try_window (window, startp)) | |
8337 | rc = -1; | |
8338 | else if (w->cursor.vpos < 0) | |
8339 | { | |
8340 | clear_glyph_matrix (w->desired_matrix); | |
8341 | rc = 0; | |
8342 | } | |
8343 | else | |
8344 | { | |
8345 | /* Maybe forget recorded base line for line number display. */ | |
8346 | if (!just_this_one_p | |
8347 | || current_buffer->clip_changed | |
9142dd5b | 8348 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
8349 | w->base_line_number = Qnil; |
8350 | ||
8351 | /* If cursor ends up on a partially visible line, shift display | |
8352 | lines up or down. */ | |
8353 | make_cursor_line_fully_visible (w); | |
8354 | rc = 1; | |
8355 | } | |
8356 | ||
8357 | return rc; | |
a2889657 JB |
8358 | } |
8359 | ||
5f5c8ee5 GM |
8360 | |
8361 | /* Compute a suitable window start for window W if display of W starts | |
8362 | on a continuation line. Value is non-zero if a new window start | |
8363 | was computed. | |
8364 | ||
8365 | The new window start will be computed, based on W's width, starting | |
8366 | from the start of the continued line. It is the start of the | |
8367 | screen line with the minimum distance from the old start W->start. */ | |
8368 | ||
8369 | static int | |
8370 | compute_window_start_on_continuation_line (w) | |
8371 | struct window *w; | |
1f1ff51d | 8372 | { |
5f5c8ee5 GM |
8373 | struct text_pos pos, start_pos; |
8374 | int window_start_changed_p = 0; | |
1f1ff51d | 8375 | |
5f5c8ee5 | 8376 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 8377 | |
5f5c8ee5 GM |
8378 | /* If window start is on a continuation line... Window start may be |
8379 | < BEGV in case there's invisible text at the start of the | |
8380 | buffer (M-x rmail, for example). */ | |
8381 | if (CHARPOS (start_pos) > BEGV | |
8382 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 8383 | { |
5f5c8ee5 GM |
8384 | struct it it; |
8385 | struct glyph_row *row; | |
f3751a65 GM |
8386 | |
8387 | /* Handle the case that the window start is out of range. */ | |
8388 | if (CHARPOS (start_pos) < BEGV) | |
8389 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
8390 | else if (CHARPOS (start_pos) > ZV) | |
8391 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
8392 | |
8393 | /* Find the start of the continued line. This should be fast | |
8394 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 8395 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
8396 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
8397 | row, DEFAULT_FACE_ID); | |
8398 | reseat_at_previous_visible_line_start (&it); | |
8399 | ||
8400 | /* If the line start is "too far" away from the window start, | |
8401 | say it takes too much time to compute a new window start. */ | |
8402 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
8403 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
8404 | { | |
8405 | int min_distance, distance; | |
8406 | ||
8407 | /* Move forward by display lines to find the new window | |
8408 | start. If window width was enlarged, the new start can | |
8409 | be expected to be > the old start. If window width was | |
8410 | decreased, the new window start will be < the old start. | |
8411 | So, we're looking for the display line start with the | |
8412 | minimum distance from the old window start. */ | |
8413 | pos = it.current.pos; | |
8414 | min_distance = INFINITY; | |
8415 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
8416 | distance < min_distance) | |
8417 | { | |
8418 | min_distance = distance; | |
8419 | pos = it.current.pos; | |
8420 | move_it_by_lines (&it, 1, 0); | |
8421 | } | |
8422 | ||
8423 | /* Set the window start there. */ | |
8424 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
8425 | window_start_changed_p = 1; | |
8426 | } | |
1f1ff51d | 8427 | } |
5f5c8ee5 GM |
8428 | |
8429 | return window_start_changed_p; | |
1f1ff51d KH |
8430 | } |
8431 | ||
5f5c8ee5 GM |
8432 | |
8433 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only | |
8434 | selected_window is redisplayed. */ | |
90adcf20 | 8435 | |
a2889657 | 8436 | static void |
5f5c8ee5 | 8437 | redisplay_window (window, just_this_one_p) |
a2889657 | 8438 | Lisp_Object window; |
5f5c8ee5 | 8439 | int just_this_one_p; |
a2889657 | 8440 | { |
5f5c8ee5 GM |
8441 | struct window *w = XWINDOW (window); |
8442 | struct frame *f = XFRAME (w->frame); | |
8443 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 8444 | struct buffer *old = current_buffer; |
5f5c8ee5 | 8445 | struct text_pos lpoint, opoint, startp; |
e481f960 | 8446 | int update_mode_line; |
5f5c8ee5 GM |
8447 | int tem; |
8448 | struct it it; | |
8449 | /* Record it now because it's overwritten. */ | |
8450 | int current_matrix_up_to_date_p = 0; | |
5ba50c51 | 8451 | int really_switched_buffer = 0; |
5f5c8ee5 | 8452 | int temp_scroll_step = 0; |
2e54982e | 8453 | int count = specpdl_ptr - specpdl; |
a2889657 | 8454 | |
5f5c8ee5 GM |
8455 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
8456 | opoint = lpoint; | |
a2889657 | 8457 | |
5f5c8ee5 GM |
8458 | /* W must be a leaf window here. */ |
8459 | xassert (!NILP (w->buffer)); | |
8460 | #if GLYPH_DEBUG | |
8461 | *w->desired_matrix->method = 0; | |
8462 | #endif | |
2e54982e RS |
8463 | |
8464 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
8465 | |
8466 | reconsider_clip_changes (w, buffer); | |
8467 | ||
5f5c8ee5 GM |
8468 | /* Has the mode line to be updated? */ |
8469 | update_mode_line = (!NILP (w->update_mode_line) | |
8470 | || update_mode_lines | |
8471 | || buffer->clip_changed); | |
8de2d90b JB |
8472 | |
8473 | if (MINI_WINDOW_P (w)) | |
8474 | { | |
5f5c8ee5 | 8475 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 8476 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
8477 | { |
8478 | if (update_mode_line) | |
8479 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 8480 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
8481 | goto finish_menu_bars; |
8482 | else | |
8483 | /* We've already displayed the echo area glyphs in this window. */ | |
8484 | goto finish_scroll_bars; | |
8485 | } | |
73af359d | 8486 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 8487 | { |
5f5c8ee5 GM |
8488 | /* W is a mini-buffer window, but it's not the currently |
8489 | active one, so clear it. */ | |
8490 | int yb = window_text_bottom_y (w); | |
8491 | struct glyph_row *row; | |
8492 | int y; | |
8493 | ||
8494 | for (y = 0, row = w->desired_matrix->rows; | |
8495 | y < yb; | |
8496 | y += row->height, ++row) | |
8497 | blank_row (w, row, y); | |
88f22aff | 8498 | goto finish_scroll_bars; |
8de2d90b JB |
8499 | } |
8500 | } | |
a2889657 | 8501 | |
5f5c8ee5 GM |
8502 | /* Otherwise set up data on this window; select its buffer and point |
8503 | value. */ | |
e481f960 | 8504 | if (update_mode_line) |
5ba50c51 | 8505 | { |
5f5c8ee5 GM |
8506 | /* Really select the buffer, for the sake of buffer-local |
8507 | variables. */ | |
5ba50c51 RS |
8508 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
8509 | really_switched_buffer = 1; | |
8510 | } | |
e481f960 RS |
8511 | else |
8512 | set_buffer_temp (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
8513 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
8514 | ||
8515 | current_matrix_up_to_date_p | |
8516 | = (!NILP (w->window_end_valid) | |
8517 | && !current_buffer->clip_changed | |
8518 | && XFASTINT (w->last_modified) >= MODIFF | |
8519 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 8520 | |
5f5c8ee5 GM |
8521 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
8522 | the window end being valid, so set it to nil there. */ | |
8523 | if (windows_or_buffers_changed) | |
8524 | { | |
8525 | /* If window starts on a continuation line, maybe adjust the | |
8526 | window start in case the window's width changed. */ | |
8527 | if (XMARKER (w->start)->buffer == current_buffer) | |
8528 | compute_window_start_on_continuation_line (w); | |
8529 | ||
8530 | w->window_end_valid = Qnil; | |
8531 | } | |
12adba34 | 8532 | |
5f5c8ee5 GM |
8533 | /* Some sanity checks. */ |
8534 | CHECK_WINDOW_END (w); | |
8535 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 8536 | abort (); |
5f5c8ee5 | 8537 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 8538 | abort (); |
a2889657 | 8539 | |
28995e67 RS |
8540 | /* If %c is in mode line, update it if needed. */ |
8541 | if (!NILP (w->column_number_displayed) | |
8542 | /* This alternative quickly identifies a common case | |
8543 | where no change is needed. */ | |
8544 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8545 | && XFASTINT (w->last_modified) >= MODIFF |
8546 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8547 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8548 | update_mode_line = 1; | |
8549 | ||
5f5c8ee5 GM |
8550 | /* Count number of windows showing the selected buffer. An indirect |
8551 | buffer counts as its base buffer. */ | |
8552 | if (!just_this_one_p) | |
42640f83 RS |
8553 | { |
8554 | struct buffer *current_base, *window_base; | |
8555 | current_base = current_buffer; | |
8556 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
8557 | if (current_base->base_buffer) | |
8558 | current_base = current_base->base_buffer; | |
8559 | if (window_base->base_buffer) | |
8560 | window_base = window_base->base_buffer; | |
8561 | if (current_base == window_base) | |
8562 | buffer_shared++; | |
8563 | } | |
a2889657 | 8564 | |
5f5c8ee5 GM |
8565 | /* Point refers normally to the selected window. For any other |
8566 | window, set up appropriate value. */ | |
a2889657 JB |
8567 | if (!EQ (window, selected_window)) |
8568 | { | |
12adba34 RS |
8569 | int new_pt = XMARKER (w->pointm)->charpos; |
8570 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 8571 | if (new_pt < BEGV) |
a2889657 | 8572 | { |
f67a0f51 | 8573 | new_pt = BEGV; |
12adba34 RS |
8574 | new_pt_byte = BEGV_BYTE; |
8575 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 8576 | } |
f67a0f51 | 8577 | else if (new_pt > (ZV - 1)) |
a2889657 | 8578 | { |
f67a0f51 | 8579 | new_pt = ZV; |
12adba34 RS |
8580 | new_pt_byte = ZV_BYTE; |
8581 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 8582 | } |
5f5c8ee5 | 8583 | |
f67a0f51 | 8584 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 8585 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
8586 | } |
8587 | ||
f4faa47c | 8588 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
8589 | have changed, invalidate the width run cache. It's true that |
8590 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
8591 | redisplay goes (non-fatally) haywire when the display table is |
8592 | changed, so why should we worry about doing any better? */ | |
8593 | if (current_buffer->width_run_cache) | |
8594 | { | |
f908610f | 8595 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
8596 | |
8597 | if (! disptab_matches_widthtab (disptab, | |
8598 | XVECTOR (current_buffer->width_table))) | |
8599 | { | |
8600 | invalidate_region_cache (current_buffer, | |
8601 | current_buffer->width_run_cache, | |
8602 | BEG, Z); | |
8603 | recompute_width_table (current_buffer, disptab); | |
8604 | } | |
8605 | } | |
8606 | ||
a2889657 | 8607 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
8608 | if (XMARKER (w->start)->buffer != current_buffer) |
8609 | goto recenter; | |
8610 | ||
5f5c8ee5 | 8611 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 8612 | |
cf0df6ab RS |
8613 | /* If someone specified a new starting point but did not insist, |
8614 | check whether it can be used. */ | |
cfad01b4 GM |
8615 | if (!NILP (w->optional_new_start) |
8616 | && CHARPOS (startp) >= BEGV | |
8617 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
8618 | { |
8619 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
8620 | /* This takes a mini-buffer prompt into account. */ |
8621 | start_display (&it, w, startp); | |
8622 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8623 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8624 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
8625 | w->force_start = Qt; |
8626 | } | |
8627 | ||
8de2d90b | 8628 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 8629 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
8630 | if (!NILP (w->force_start) |
8631 | || w->frozen_window_start_p) | |
a2889657 | 8632 | { |
e63574d7 | 8633 | w->force_start = Qnil; |
5f5c8ee5 | 8634 | w->vscroll = 0; |
b5174a51 | 8635 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
8636 | |
8637 | /* Forget any recorded base line for line number display. */ | |
8638 | if (!current_matrix_up_to_date_p | |
8639 | || current_buffer->clip_changed) | |
8640 | w->base_line_number = Qnil; | |
8641 | ||
75c43375 RS |
8642 | /* Redisplay the mode line. Select the buffer properly for that. |
8643 | Also, run the hook window-scroll-functions | |
8644 | because we have scrolled. */ | |
e63574d7 RS |
8645 | /* Note, we do this after clearing force_start because |
8646 | if there's an error, it is better to forget about force_start | |
8647 | than to get into an infinite loop calling the hook functions | |
8648 | and having them get more errors. */ | |
75c43375 RS |
8649 | if (!update_mode_line |
8650 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 8651 | { |
5ba50c51 RS |
8652 | if (!really_switched_buffer) |
8653 | { | |
8654 | set_buffer_temp (old); | |
8655 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8656 | really_switched_buffer = 1; |
5ba50c51 | 8657 | } |
5f5c8ee5 | 8658 | |
e481f960 RS |
8659 | update_mode_line = 1; |
8660 | w->update_mode_line = Qt; | |
5f5c8ee5 | 8661 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 8662 | } |
5f5c8ee5 | 8663 | |
c2213350 | 8664 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8665 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
8666 | if (CHARPOS (startp) < BEGV) |
8667 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
8668 | else if (CHARPOS (startp) > ZV) | |
8669 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
8670 | ||
8671 | /* Redisplay, then check if cursor has been set during the | |
8672 | redisplay. Give up if new fonts were loaded. */ | |
8673 | if (!try_window (window, startp)) | |
8674 | { | |
8675 | w->force_start = Qt; | |
8676 | clear_glyph_matrix (w->desired_matrix); | |
8677 | goto restore_buffers; | |
8678 | } | |
8679 | ||
9472f927 | 8680 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 GM |
8681 | { |
8682 | /* If point does not appear, or on a line that is not fully | |
8683 | visible, move point so it does appear. The desired | |
8684 | matrix has been built above, so we can use it. */ | |
8685 | int height = window_box_height (w) / 2; | |
8686 | struct glyph_row *row = MATRIX_ROW (w->desired_matrix, 0); | |
8687 | ||
8688 | while (row->y < height) | |
8689 | ++row; | |
8690 | ||
8691 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
8692 | MATRIX_ROW_START_BYTEPOS (row)); | |
8693 | ||
90adcf20 | 8694 | if (w != XWINDOW (selected_window)) |
12adba34 | 8695 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
8696 | else if (current_buffer == old) |
8697 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
8698 | ||
8699 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
8700 | ||
8701 | /* If we are highlighting the region, then we just changed | |
8702 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
8703 | if (!NILP (Vtransient_mark_mode) |
8704 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 8705 | { |
5f5c8ee5 GM |
8706 | clear_glyph_matrix (w->desired_matrix); |
8707 | if (!try_window (window, startp)) | |
8708 | goto restore_buffers; | |
6f27fa9b | 8709 | } |
a2889657 | 8710 | } |
5f5c8ee5 GM |
8711 | |
8712 | make_cursor_line_fully_visible (w); | |
8713 | #if GLYPH_DEBUG | |
8714 | debug_method_add (w, "forced window start"); | |
8715 | #endif | |
a2889657 JB |
8716 | goto done; |
8717 | } | |
8718 | ||
5f5c8ee5 GM |
8719 | /* Handle case where text has not changed, only point, and it has |
8720 | not moved off the frame. */ | |
8721 | if (current_matrix_up_to_date_p | |
8722 | /* Point may be in this window. */ | |
8723 | && PT >= CHARPOS (startp) | |
8724 | /* If we don't check this, we are called to move the cursor in a | |
8725 | horizontally split window with a current matrix that doesn't | |
8726 | fit the display. */ | |
8727 | && !windows_or_buffers_changed | |
8728 | /* Selective display hasn't changed. */ | |
8729 | && !current_buffer->clip_changed | |
b1aa6cb3 RS |
8730 | /* If force-mode-line-update was called, really redisplay; |
8731 | that's how redisplay is forced after e.g. changing | |
8732 | buffer-invisibility-spec. */ | |
632ab665 | 8733 | && NILP (w->update_mode_line) |
5f5c8ee5 GM |
8734 | /* Can't use this case if highlighting a region. When a |
8735 | region exists, cursor movement has to do more than just | |
8736 | set the cursor. */ | |
8737 | && !(!NILP (Vtransient_mark_mode) | |
8738 | && !NILP (current_buffer->mark_active)) | |
bd66d1ba | 8739 | && NILP (w->region_showing) |
8f897821 | 8740 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
8741 | /* Right after splitting windows, last_point may be nil. */ |
8742 | && INTEGERP (w->last_point) | |
8743 | /* This code is not used for mini-buffer for the sake of the case | |
8744 | of redisplaying to replace an echo area message; since in | |
8745 | that case the mini-buffer contents per se are usually | |
8746 | unchanged. This code is of no real use in the mini-buffer | |
8747 | since the handling of this_line_start_pos, etc., in redisplay | |
8748 | handles the same cases. */ | |
d45de95b | 8749 | && !EQ (window, minibuf_window) |
5f5c8ee5 GM |
8750 | /* When splitting windows or for new windows, it happens that |
8751 | redisplay is called with a nil window_end_vpos or one being | |
8752 | larger than the window. This should really be fixed in | |
8753 | window.c. I don't have this on my list, now, so we do | |
8754 | approximately the same as the old redisplay code. --gerd. */ | |
8755 | && INTEGERP (w->window_end_vpos) | |
8756 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
8757 | && (FRAME_WINDOW_P (f) | |
8758 | || !MARKERP (Voverlay_arrow_position) | |
377dbd97 | 8759 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) |
a2889657 | 8760 | { |
5f5c8ee5 GM |
8761 | int this_scroll_margin; |
8762 | struct glyph_row *row; | |
8763 | int scroll_p; | |
a2889657 | 8764 | |
5f5c8ee5 GM |
8765 | #if GLYPH_DEBUG |
8766 | debug_method_add (w, "cursor movement"); | |
8767 | #endif | |
9afd2168 | 8768 | |
5f5c8ee5 GM |
8769 | /* Scroll if point within this distance from the top or bottom |
8770 | of the window. This is a pixel value. */ | |
8771 | this_scroll_margin = max (0, scroll_margin); | |
8772 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
8773 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8774 | ||
8775 | /* Start with the row the cursor was displayed during the last | |
8776 | not paused redisplay. Give up if that row is not valid. */ | |
8777 | if (w->last_cursor.vpos >= w->current_matrix->nrows) | |
8778 | goto try_to_scroll; | |
8779 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
8780 | if (row->mode_line_p) | |
8781 | ++row; | |
8782 | if (!row->enabled_p) | |
8783 | goto try_to_scroll; | |
8784 | ||
8785 | scroll_p = 0; | |
8786 | if (PT > XFASTINT (w->last_point)) | |
8787 | { | |
8788 | /* Point has moved forward. */ | |
8789 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
8790 | ||
8791 | while ((MATRIX_ROW_END_CHARPOS (row) < PT | |
8792 | /* The end position of a row equals the start | |
8793 | position of the next row. If PT is there, we | |
8794 | would rather display it in the next line, except | |
8795 | when this line ends in ZV. */ | |
8796 | || (MATRIX_ROW_END_CHARPOS (row) == PT | |
8797 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
8798 | || !row->ends_at_zv_p))) | |
8799 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
8800 | { | |
8801 | xassert (row->enabled_p); | |
8802 | ++row; | |
8803 | } | |
9afd2168 | 8804 | |
5f5c8ee5 GM |
8805 | /* If within the scroll margin, scroll. Note that |
8806 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which the | |
8807 | next line would be drawn, and that this_scroll_margin can | |
8808 | be zero. */ | |
8809 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
8810 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
8811 | /* Line is completely visible last line in window and PT | |
8812 | is to be set in the next line. */ | |
8813 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
8814 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
8815 | && !row->ends_at_zv_p | |
8816 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
8817 | scroll_p = 1; | |
8818 | } | |
8819 | else if (PT < XFASTINT (w->last_point)) | |
a2889657 | 8820 | { |
5f5c8ee5 GM |
8821 | /* Cursor has to be moved backward. Note that PT >= |
8822 | CHARPOS (startp) because of the outer if-statement. */ | |
8823 | while (!row->mode_line_p | |
8824 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
8825 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
8826 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
8827 | && (row->y > this_scroll_margin | |
8828 | || CHARPOS (startp) == BEGV)) | |
a2889657 | 8829 | { |
5f5c8ee5 GM |
8830 | xassert (row->enabled_p); |
8831 | --row; | |
a2889657 | 8832 | } |
abb4c08f | 8833 | |
5f5c8ee5 GM |
8834 | /* Consider the following case: Window starts at BEGV, there |
8835 | is invisible, intangible text at BEGV, so that display | |
8836 | starts at some point START > BEGV. It can happen that | |
8837 | we are called with PT somewhere between BEGV and START. | |
8838 | Try to handle that case. */ | |
8839 | if (row < w->current_matrix->rows | |
8840 | || row->mode_line_p) | |
8841 | { | |
8842 | row = w->current_matrix->rows; | |
8843 | if (row->mode_line_p) | |
8844 | ++row; | |
8845 | } | |
8846 | ||
8847 | /* Due to newlines in overlay strings, we may have to skip | |
8848 | forward over overlay strings. */ | |
8849 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
8850 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
8851 | && !row->ends_at_zv_p) | |
8852 | ++row; | |
8853 | ||
8854 | /* If within the scroll margin, scroll. */ | |
8855 | if (row->y < this_scroll_margin | |
8856 | && CHARPOS (startp) != BEGV) | |
8857 | scroll_p = 1; | |
8858 | } | |
8859 | ||
8860 | /* if PT is not in the glyph row, give up. */ | |
8861 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8862 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8863 | goto try_to_scroll; | |
8864 | ||
8865 | /* If we end up in a partially visible line, let's make it fully | |
8866 | visible. This can be done most easily by using the existing | |
8867 | scrolling code. */ | |
8868 | if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8869 | { | |
8870 | temp_scroll_step = 1; | |
8871 | goto try_to_scroll; | |
a2889657 | 8872 | } |
5f5c8ee5 GM |
8873 | else if (scroll_p) |
8874 | goto try_to_scroll; | |
8875 | ||
8876 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8877 | goto done; | |
a2889657 | 8878 | } |
5f5c8ee5 | 8879 | |
a2889657 JB |
8880 | /* If current starting point was originally the beginning of a line |
8881 | but no longer is, find a new starting point. */ | |
265a9e55 | 8882 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
8883 | && !(CHARPOS (startp) <= BEGV |
8884 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 8885 | { |
5f5c8ee5 GM |
8886 | #if GLYPH_DEBUG |
8887 | debug_method_add (w, "recenter 1"); | |
8888 | #endif | |
a2889657 JB |
8889 | goto recenter; |
8890 | } | |
5f5c8ee5 GM |
8891 | |
8892 | /* Try scrolling with try_window_id. */ | |
9142dd5b GM |
8893 | else if (/* Windows and buffers haven't changed. */ |
8894 | !windows_or_buffers_changed | |
5f5c8ee5 GM |
8895 | /* Window must be either use window-based redisplay or |
8896 | be full width. */ | |
8897 | && (FRAME_WINDOW_P (f) | |
c59c668a | 8898 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))) |
5f5c8ee5 GM |
8899 | && !MINI_WINDOW_P (w) |
8900 | /* Point is not known NOT to appear in window. */ | |
8901 | && PT >= CHARPOS (startp) | |
a2889657 | 8902 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
8903 | /* Window is not hscrolled. */ |
8904 | && XFASTINT (w->hscroll) == 0 | |
8905 | /* Selective display has not changed. */ | |
8906 | && !current_buffer->clip_changed | |
8907 | /* Current matrix is up to date. */ | |
8908 | && !NILP (w->window_end_valid) | |
8909 | /* Can't use this case if highlighting a region because | |
8910 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
8911 | && !(!NILP (Vtransient_mark_mode) |
8912 | && !NILP (current_buffer->mark_active)) | |
8913 | && NILP (w->region_showing) | |
8f897821 | 8914 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 | 8915 | /* Overlay arrow position and string not changed. */ |
d45de95b | 8916 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 8917 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
8918 | /* Value is > 0 if update has been done, it is -1 if we |
8919 | know that the same window start will not work. It is 0 | |
8920 | if unsuccessful for some other reason. */ | |
8921 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 8922 | { |
5f5c8ee5 GM |
8923 | #if GLYPH_DEBUG |
8924 | debug_method_add (w, "try_window_id"); | |
8925 | #endif | |
8926 | ||
8927 | if (fonts_changed_p) | |
8928 | goto restore_buffers; | |
a2889657 JB |
8929 | if (tem > 0) |
8930 | goto done; | |
5f5c8ee5 GM |
8931 | /* Otherwise try_window_id has returned -1 which means that we |
8932 | don't want the alternative below this comment to execute. */ | |
a2889657 | 8933 | } |
5f5c8ee5 GM |
8934 | else if (CHARPOS (startp) >= BEGV |
8935 | && CHARPOS (startp) <= ZV | |
8936 | && PT >= CHARPOS (startp) | |
8937 | && (CHARPOS (startp) < ZV | |
e9874cee | 8938 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 8939 | || CHARPOS (startp) == BEGV |
8850a573 RS |
8940 | || (XFASTINT (w->last_modified) >= MODIFF |
8941 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 8942 | { |
5f5c8ee5 GM |
8943 | #if GLYPH_DEBUG |
8944 | debug_method_add (w, "same window start"); | |
8945 | #endif | |
8946 | ||
8947 | /* Try to redisplay starting at same place as before. | |
8948 | If point has not moved off frame, accept the results. */ | |
8949 | if (!current_matrix_up_to_date_p | |
8950 | /* Don't use try_window_reusing_current_matrix in this case | |
15e26c76 GM |
8951 | because a window scroll function can have changed the |
8952 | buffer. */ | |
5f5c8ee5 GM |
8953 | || !NILP (Vwindow_scroll_functions) |
8954 | || MINI_WINDOW_P (w) | |
8955 | || !try_window_reusing_current_matrix (w)) | |
8956 | { | |
8957 | IF_DEBUG (debug_method_add (w, "1")); | |
8958 | try_window (window, startp); | |
8959 | } | |
8960 | ||
8961 | if (fonts_changed_p) | |
8962 | goto restore_buffers; | |
8963 | ||
8964 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 8965 | { |
5f5c8ee5 GM |
8966 | if (!just_this_one_p |
8967 | || current_buffer->clip_changed | |
9142dd5b | 8968 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
8969 | /* Forget any recorded base line for line number display. */ |
8970 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
8971 | |
8972 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
8973 | goto done; |
8974 | } | |
a2889657 | 8975 | else |
5f5c8ee5 | 8976 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
8977 | } |
8978 | ||
5f5c8ee5 GM |
8979 | try_to_scroll: |
8980 | ||
c2213350 | 8981 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8982 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 8983 | |
e481f960 RS |
8984 | /* Redisplay the mode line. Select the buffer properly for that. */ |
8985 | if (!update_mode_line) | |
8986 | { | |
5ba50c51 RS |
8987 | if (!really_switched_buffer) |
8988 | { | |
8989 | set_buffer_temp (old); | |
8990 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8991 | really_switched_buffer = 1; |
5ba50c51 | 8992 | } |
e481f960 RS |
8993 | update_mode_line = 1; |
8994 | w->update_mode_line = Qt; | |
8995 | } | |
a2889657 | 8996 | |
5f5c8ee5 GM |
8997 | /* Try to scroll by specified few lines. */ |
8998 | if ((scroll_conservatively | |
8999 | || scroll_step | |
9000 | || temp_scroll_step | |
9001 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
9002 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 9003 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
9004 | && CHARPOS (startp) >= BEGV |
9005 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 9006 | { |
5f5c8ee5 GM |
9007 | /* The function returns -1 if new fonts were loaded, 1 if |
9008 | successful, 0 if not successful. */ | |
9009 | int rc = try_scrolling (window, just_this_one_p, | |
9010 | scroll_conservatively, | |
9011 | scroll_step, | |
9012 | temp_scroll_step); | |
9013 | if (rc > 0) | |
9014 | goto done; | |
9015 | else if (rc < 0) | |
9016 | goto restore_buffers; | |
9017 | } | |
f9c8af06 | 9018 | |
5f5c8ee5 | 9019 | /* Finally, just choose place to start which centers point */ |
5936754e | 9020 | |
5f5c8ee5 | 9021 | recenter: |
44173109 | 9022 | |
5f5c8ee5 GM |
9023 | #if GLYPH_DEBUG |
9024 | debug_method_add (w, "recenter"); | |
9025 | #endif | |
0789adb2 | 9026 | |
5f5c8ee5 | 9027 | /* w->vscroll = 0; */ |
0789adb2 | 9028 | |
5f5c8ee5 GM |
9029 | /* Forget any previously recorded base line for line number display. */ |
9030 | if (!current_matrix_up_to_date_p | |
9031 | || current_buffer->clip_changed) | |
9032 | w->base_line_number = Qnil; | |
9033 | ||
9034 | /* Move backward half the height of the window. */ | |
9035 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
9036 | it.current_y = it.last_visible_y; | |
9037 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
9038 | xassert (IT_CHARPOS (it) >= BEGV); | |
9039 | ||
9040 | /* The function move_it_vertically_backward may move over more | |
9041 | than the specified y-distance. If it->w is small, e.g. a | |
9042 | mini-buffer window, we may end up in front of the window's | |
9043 | display area. Start displaying at the start of the line | |
9044 | containing PT in this case. */ | |
9045 | if (it.current_y <= 0) | |
9046 | { | |
9047 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
9048 | move_it_vertically (&it, 0); | |
9049 | xassert (IT_CHARPOS (it) <= PT); | |
9050 | it.current_y = 0; | |
0789adb2 RS |
9051 | } |
9052 | ||
5f5c8ee5 GM |
9053 | it.current_x = it.hpos = 0; |
9054 | ||
9055 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
9056 | in case the window-scroll-functions functions get errors. */ | |
9057 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
9058 | ||
9059 | /* Run scroll hooks. */ | |
9060 | startp = run_window_scroll_functions (window, it.current.pos); | |
9061 | ||
9062 | /* Redisplay the window. */ | |
9063 | if (!current_matrix_up_to_date_p | |
9064 | || windows_or_buffers_changed | |
9065 | /* Don't use try_window_reusing_current_matrix in this case | |
9066 | because it can have changed the buffer. */ | |
9067 | || !NILP (Vwindow_scroll_functions) | |
9068 | || !just_this_one_p | |
9069 | || MINI_WINDOW_P (w) | |
9070 | || !try_window_reusing_current_matrix (w)) | |
9071 | try_window (window, startp); | |
9072 | ||
9073 | /* If new fonts have been loaded (due to fontsets), give up. We | |
9074 | have to start a new redisplay since we need to re-adjust glyph | |
9075 | matrices. */ | |
9076 | if (fonts_changed_p) | |
9077 | goto restore_buffers; | |
9078 | ||
9079 | /* If cursor did not appear assume that the middle of the window is | |
9080 | in the first line of the window. Do it again with the next line. | |
9081 | (Imagine a window of height 100, displaying two lines of height | |
9082 | 60. Moving back 50 from it->last_visible_y will end in the first | |
9083 | line.) */ | |
9084 | if (w->cursor.vpos < 0) | |
a2889657 | 9085 | { |
5f5c8ee5 GM |
9086 | if (!NILP (w->window_end_valid) |
9087 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 9088 | { |
5f5c8ee5 GM |
9089 | clear_glyph_matrix (w->desired_matrix); |
9090 | move_it_by_lines (&it, 1, 0); | |
9091 | try_window (window, it.current.pos); | |
a2889657 | 9092 | } |
5f5c8ee5 | 9093 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 9094 | { |
5f5c8ee5 GM |
9095 | clear_glyph_matrix (w->desired_matrix); |
9096 | move_it_by_lines (&it, -1, 0); | |
9097 | try_window (window, it.current.pos); | |
9098 | } | |
9099 | else | |
9100 | { | |
9101 | /* Not much we can do about it. */ | |
a2889657 | 9102 | } |
a2889657 | 9103 | } |
010494d0 | 9104 | |
5f5c8ee5 GM |
9105 | /* Consider the following case: Window starts at BEGV, there is |
9106 | invisible, intangible text at BEGV, so that display starts at | |
9107 | some point START > BEGV. It can happen that we are called with | |
9108 | PT somewhere between BEGV and START. Try to handle that case. */ | |
9109 | if (w->cursor.vpos < 0) | |
835766b6 | 9110 | { |
5f5c8ee5 GM |
9111 | struct glyph_row *row = w->current_matrix->rows; |
9112 | if (row->mode_line_p) | |
9113 | ++row; | |
9114 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 9115 | } |
5f5c8ee5 GM |
9116 | |
9117 | make_cursor_line_fully_visible (w); | |
b5174a51 | 9118 | |
74d481ac GM |
9119 | done: |
9120 | ||
5f5c8ee5 GM |
9121 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
9122 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
9123 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
9124 | ? Qt : Qnil); | |
a2889657 | 9125 | |
5f5c8ee5 | 9126 | /* Display the mode line, if we must. */ |
e481f960 | 9127 | if ((update_mode_line |
aa6d10fa | 9128 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
9129 | if (a) the window to its side is being redone and |
9130 | (b) we do a frame-based redisplay. This is a consequence | |
9131 | of how inverted lines are drawn in frame-based redisplay. */ | |
9132 | || (!just_this_one_p | |
9133 | && !FRAME_WINDOW_P (f) | |
9134 | && !WINDOW_FULL_WIDTH_P (w)) | |
9135 | /* Line number to display. */ | |
155ef550 | 9136 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 9137 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
9138 | || (!NILP (w->column_number_displayed) |
9139 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
9140 | /* This means that the window has a mode line. */ |
9141 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 9142 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 9143 | { |
5f5c8ee5 GM |
9144 | display_mode_lines (w); |
9145 | ||
9146 | /* If mode line height has changed, arrange for a thorough | |
9147 | immediate redisplay using the correct mode line height. */ | |
9148 | if (WINDOW_WANTS_MODELINE_P (w) | |
9149 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 9150 | { |
5f5c8ee5 GM |
9151 | fonts_changed_p = 1; |
9152 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
9153 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 9154 | } |
5f5c8ee5 GM |
9155 | |
9156 | /* If top line height has changed, arrange for a thorough | |
9157 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
9158 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9159 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
9160 | { |
9161 | fonts_changed_p = 1; | |
045dee35 GM |
9162 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
9163 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
9164 | } |
9165 | ||
9166 | if (fonts_changed_p) | |
9167 | goto restore_buffers; | |
5ba50c51 | 9168 | } |
5f5c8ee5 GM |
9169 | |
9170 | if (!line_number_displayed | |
9171 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
9172 | { |
9173 | w->base_line_pos = Qnil; | |
9174 | w->base_line_number = Qnil; | |
9175 | } | |
a2889657 | 9176 | |
5f5c8ee5 GM |
9177 | finish_menu_bars: |
9178 | ||
7ce2c095 | 9179 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 9180 | if (update_mode_line |
5f5c8ee5 GM |
9181 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
9182 | { | |
9183 | int redisplay_menu_p = 0; | |
9184 | ||
9185 | if (FRAME_WINDOW_P (f)) | |
9186 | { | |
dc937613 | 9187 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 9188 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 9189 | #else |
5f5c8ee5 | 9190 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 9191 | #endif |
5f5c8ee5 GM |
9192 | } |
9193 | else | |
9194 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
9195 | ||
9196 | if (redisplay_menu_p) | |
9197 | display_menu_bar (w); | |
9198 | ||
9199 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
9200 | if (WINDOWP (f->tool_bar_window) |
9201 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
9202 | || auto_resize_tool_bars_p)) | |
9203 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
9204 | #endif |
9205 | } | |
7ce2c095 | 9206 | |
88f22aff | 9207 | finish_scroll_bars: |
5f5c8ee5 | 9208 | |
88f22aff | 9209 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 9210 | { |
b1d1124b | 9211 | int start, end, whole; |
30c566e4 | 9212 | |
b1d1124b | 9213 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
9214 | At some point, it would be nice to choose between scrollbars |
9215 | which reflect the whole buffer size, with special markers | |
9216 | indicating narrowing, and scrollbars which reflect only the | |
9217 | visible region. | |
9218 | ||
5f5c8ee5 | 9219 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 9220 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 9221 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 9222 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 9223 | { |
8a9311d7 | 9224 | whole = ZV - BEGV; |
4d641a15 | 9225 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
9226 | /* I don't think this is guaranteed to be right. For the |
9227 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 9228 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 9229 | |
5f5c8ee5 GM |
9230 | if (end < start) |
9231 | end = start; | |
9232 | if (whole < (end - start)) | |
9233 | whole = end - start; | |
b1d1124b JB |
9234 | } |
9235 | else | |
9236 | start = end = whole = 0; | |
30c566e4 | 9237 | |
88f22aff | 9238 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 9239 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 9240 | |
5f5c8ee5 GM |
9241 | /* Note that we actually used the scroll bar attached to this |
9242 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 9243 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 9244 | } |
b1d1124b | 9245 | |
5f5c8ee5 GM |
9246 | restore_buffers: |
9247 | ||
9248 | /* Restore current_buffer and value of point in it. */ | |
9249 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
5ba50c51 | 9250 | if (really_switched_buffer) |
f72df6ac | 9251 | set_buffer_internal_1 (old); |
e481f960 RS |
9252 | else |
9253 | set_buffer_temp (old); | |
5f5c8ee5 | 9254 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
9255 | |
9256 | unbind_to (count, Qnil); | |
a2889657 | 9257 | } |
a2889657 | 9258 | |
5f5c8ee5 GM |
9259 | |
9260 | /* Build the complete desired matrix of WINDOW with a window start | |
9261 | buffer position POS. Value is non-zero if successful. It is zero | |
9262 | if fonts were loaded during redisplay which makes re-adjusting | |
9263 | glyph matrices necessary. */ | |
9264 | ||
9265 | int | |
a2889657 JB |
9266 | try_window (window, pos) |
9267 | Lisp_Object window; | |
5f5c8ee5 GM |
9268 | struct text_pos pos; |
9269 | { | |
9270 | struct window *w = XWINDOW (window); | |
9271 | struct it it; | |
9272 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 9273 | |
5f5c8ee5 GM |
9274 | /* Make POS the new window start. */ |
9275 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 9276 | |
5f5c8ee5 GM |
9277 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
9278 | w->cursor.vpos = -1; | |
a2889657 | 9279 | overlay_arrow_seen = 0; |
642eefc6 | 9280 | |
5f5c8ee5 GM |
9281 | /* Initialize iterator and info to start at POS. */ |
9282 | start_display (&it, w, pos); | |
a2889657 | 9283 | |
5f5c8ee5 GM |
9284 | /* Display all lines of W. */ |
9285 | while (it.current_y < it.last_visible_y) | |
9286 | { | |
9287 | if (display_line (&it)) | |
9288 | last_text_row = it.glyph_row - 1; | |
9289 | if (fonts_changed_p) | |
9290 | return 0; | |
9291 | } | |
a2889657 | 9292 | |
5f5c8ee5 GM |
9293 | /* If bottom moved off end of frame, change mode line percentage. */ |
9294 | if (XFASTINT (w->window_end_pos) <= 0 | |
9295 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
9296 | w->update_mode_line = Qt; |
9297 | ||
5f5c8ee5 GM |
9298 | /* Set window_end_pos to the offset of the last character displayed |
9299 | on the window from the end of current_buffer. Set | |
9300 | window_end_vpos to its row number. */ | |
9301 | if (last_text_row) | |
9302 | { | |
9303 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
9304 | w->window_end_bytepos | |
9305 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9306 | XSETFASTINT (w->window_end_pos, | |
9307 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9308 | XSETFASTINT (w->window_end_vpos, | |
9309 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9310 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
9311 | ->displays_text_p); | |
9312 | } | |
9313 | else | |
9314 | { | |
9315 | w->window_end_bytepos = 0; | |
9316 | XSETFASTINT (w->window_end_pos, 0); | |
9317 | XSETFASTINT (w->window_end_vpos, 0); | |
9318 | } | |
9319 | ||
a2889657 JB |
9320 | /* But that is not valid info until redisplay finishes. */ |
9321 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 9322 | return 1; |
a2889657 | 9323 | } |
5f5c8ee5 GM |
9324 | |
9325 | ||
a2889657 | 9326 | \f |
5f5c8ee5 GM |
9327 | /************************************************************************ |
9328 | Window redisplay reusing current matrix when buffer has not changed | |
9329 | ************************************************************************/ | |
9330 | ||
9331 | /* Try redisplay of window W showing an unchanged buffer with a | |
9332 | different window start than the last time it was displayed by | |
9333 | reusing its current matrix. Value is non-zero if successful. | |
9334 | W->start is the new window start. */ | |
a2889657 JB |
9335 | |
9336 | static int | |
5f5c8ee5 GM |
9337 | try_window_reusing_current_matrix (w) |
9338 | struct window *w; | |
a2889657 | 9339 | { |
5f5c8ee5 GM |
9340 | struct frame *f = XFRAME (w->frame); |
9341 | struct glyph_row *row, *bottom_row; | |
9342 | struct it it; | |
9343 | struct run run; | |
9344 | struct text_pos start, new_start; | |
9345 | int nrows_scrolled, i; | |
9346 | struct glyph_row *last_text_row; | |
9347 | struct glyph_row *last_reused_text_row; | |
9348 | struct glyph_row *start_row; | |
9349 | int start_vpos, min_y, max_y; | |
9350 | ||
9351 | /* Right now this function doesn't handle terminal frames. */ | |
9352 | if (!FRAME_WINDOW_P (f)) | |
9353 | return 0; | |
a2889657 | 9354 | |
5f5c8ee5 GM |
9355 | /* Can't do this if region may have changed. */ |
9356 | if ((!NILP (Vtransient_mark_mode) | |
9357 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
9358 | || !NILP (w->region_showing) |
9359 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 9360 | return 0; |
a2889657 | 9361 | |
5f5c8ee5 | 9362 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
9363 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9364 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
9365 | return 0; |
9366 | ||
9367 | /* Give up if old or new display is scrolled vertically. We could | |
9368 | make this function handle this, but right now it doesn't. */ | |
9369 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9370 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
9371 | return 0; | |
9372 | ||
9373 | /* The variable new_start now holds the new window start. The old | |
9374 | start `start' can be determined from the current matrix. */ | |
9375 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
9376 | start = start_row->start.pos; | |
9377 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 9378 | |
5f5c8ee5 GM |
9379 | /* Clear the desired matrix for the display below. */ |
9380 | clear_glyph_matrix (w->desired_matrix); | |
9381 | ||
9382 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
9383 | { | |
9384 | int first_row_y; | |
9385 | ||
9386 | IF_DEBUG (debug_method_add (w, "twu1")); | |
9387 | ||
9388 | /* Display up to a row that can be reused. The variable | |
9389 | last_text_row is set to the last row displayed that displays | |
9390 | text. */ | |
9391 | start_display (&it, w, new_start); | |
9392 | first_row_y = it.current_y; | |
9393 | w->cursor.vpos = -1; | |
9394 | last_text_row = last_reused_text_row = NULL; | |
9395 | while (it.current_y < it.last_visible_y | |
9396 | && IT_CHARPOS (it) < CHARPOS (start) | |
9397 | && !fonts_changed_p) | |
9398 | if (display_line (&it)) | |
9399 | last_text_row = it.glyph_row - 1; | |
9400 | ||
9401 | /* A value of current_y < last_visible_y means that we stopped | |
9402 | at the previous window start, which in turn means that we | |
9403 | have at least one reusable row. */ | |
9404 | if (it.current_y < it.last_visible_y) | |
a2889657 | 9405 | { |
5f5c8ee5 GM |
9406 | nrows_scrolled = it.vpos; |
9407 | ||
9408 | /* Find PT if not already found in the lines displayed. */ | |
9409 | if (w->cursor.vpos < 0) | |
a2889657 | 9410 | { |
5f5c8ee5 GM |
9411 | int dy = it.current_y - first_row_y; |
9412 | ||
9413 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9414 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9415 | { | |
9416 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
9417 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9418 | { | |
9419 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
9420 | dy, nrows_scrolled); | |
9421 | break; | |
9422 | } | |
9423 | ||
9424 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
9425 | break; | |
9426 | ||
9427 | ++row; | |
9428 | } | |
9429 | ||
9430 | /* Give up if point was not found. This shouldn't | |
9431 | happen often; not more often than with try_window | |
9432 | itself. */ | |
9433 | if (w->cursor.vpos < 0) | |
9434 | { | |
9435 | clear_glyph_matrix (w->desired_matrix); | |
9436 | return 0; | |
9437 | } | |
a2889657 | 9438 | } |
5f5c8ee5 GM |
9439 | |
9440 | /* Scroll the display. Do it before the current matrix is | |
9441 | changed. The problem here is that update has not yet | |
9442 | run, i.e. part of the current matrix is not up to date. | |
9443 | scroll_run_hook will clear the cursor, and use the | |
9444 | current matrix to get the height of the row the cursor is | |
9445 | in. */ | |
9446 | run.current_y = first_row_y; | |
9447 | run.desired_y = it.current_y; | |
9448 | run.height = it.last_visible_y - it.current_y; | |
15e26c76 GM |
9449 | if (run.height > 0 |
9450 | && run.current_y != run.desired_y) | |
a2889657 | 9451 | { |
5f5c8ee5 GM |
9452 | update_begin (f); |
9453 | rif->update_window_begin_hook (w); | |
9454 | rif->scroll_run_hook (w, &run); | |
9455 | rif->update_window_end_hook (w, 0); | |
9456 | update_end (f); | |
a2889657 | 9457 | } |
5f5c8ee5 GM |
9458 | |
9459 | /* Shift current matrix down by nrows_scrolled lines. */ | |
9460 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9461 | rotate_matrix (w->current_matrix, | |
9462 | start_vpos, | |
9463 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9464 | nrows_scrolled); | |
9465 | ||
9466 | /* Disable lines not reused. */ | |
9467 | for (i = 0; i < it.vpos; ++i) | |
9468 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
9469 | ||
9470 | /* Re-compute Y positions. */ | |
9471 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
045dee35 | 9472 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9473 | max_y = it.last_visible_y; |
9474 | while (row < bottom_row) | |
d2f84654 | 9475 | { |
5f5c8ee5 GM |
9476 | row->y = it.current_y; |
9477 | ||
9478 | if (row->y < min_y) | |
9479 | row->visible_height = row->height - (min_y - row->y); | |
9480 | else if (row->y + row->height > max_y) | |
9481 | row->visible_height | |
9482 | = row->height - (row->y + row->height - max_y); | |
9483 | else | |
9484 | row->visible_height = row->height; | |
9485 | ||
9486 | it.current_y += row->height; | |
9487 | ++it.vpos; | |
9488 | ||
9489 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9490 | last_reused_text_row = row; | |
9491 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
9492 | break; | |
9493 | ++row; | |
d2f84654 | 9494 | } |
a2889657 | 9495 | } |
5f5c8ee5 GM |
9496 | |
9497 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
9498 | reused row from the current matrix containing text, if any. | |
9499 | The value of last_text_row is the last displayed line | |
9500 | containing text. */ | |
9501 | if (last_reused_text_row) | |
a2889657 | 9502 | { |
5f5c8ee5 GM |
9503 | w->window_end_bytepos |
9504 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
9505 | XSETFASTINT (w->window_end_pos, | |
9506 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
9507 | XSETFASTINT (w->window_end_vpos, | |
9508 | MATRIX_ROW_VPOS (last_reused_text_row, | |
9509 | w->current_matrix)); | |
a2889657 | 9510 | } |
5f5c8ee5 GM |
9511 | else if (last_text_row) |
9512 | { | |
9513 | w->window_end_bytepos | |
9514 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9515 | XSETFASTINT (w->window_end_pos, | |
9516 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9517 | XSETFASTINT (w->window_end_vpos, | |
9518 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9519 | } | |
9520 | else | |
9521 | { | |
9522 | /* This window must be completely empty. */ | |
9523 | w->window_end_bytepos = 0; | |
9524 | XSETFASTINT (w->window_end_pos, 0); | |
9525 | XSETFASTINT (w->window_end_vpos, 0); | |
9526 | } | |
9527 | w->window_end_valid = Qnil; | |
a2889657 | 9528 | |
5f5c8ee5 GM |
9529 | /* Update hint: don't try scrolling again in update_window. */ |
9530 | w->desired_matrix->no_scrolling_p = 1; | |
9531 | ||
9532 | #if GLYPH_DEBUG | |
9533 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
9534 | #endif | |
9535 | return 1; | |
a2889657 | 9536 | } |
5f5c8ee5 GM |
9537 | else if (CHARPOS (new_start) > CHARPOS (start)) |
9538 | { | |
9539 | struct glyph_row *pt_row, *row; | |
9540 | struct glyph_row *first_reusable_row; | |
9541 | struct glyph_row *first_row_to_display; | |
9542 | int dy; | |
9543 | int yb = window_text_bottom_y (w); | |
9544 | ||
9545 | IF_DEBUG (debug_method_add (w, "twu2")); | |
9546 | ||
9547 | /* Find the row starting at new_start, if there is one. Don't | |
9548 | reuse a partially visible line at the end. */ | |
9549 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9550 | while (first_reusable_row->enabled_p | |
9551 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
9552 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9553 | < CHARPOS (new_start))) | |
9554 | ++first_reusable_row; | |
9555 | ||
9556 | /* Give up if there is no row to reuse. */ | |
9557 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
9558 | || !first_reusable_row->enabled_p |
9559 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9560 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
9561 | return 0; |
9562 | ||
5f5c8ee5 GM |
9563 | /* We can reuse fully visible rows beginning with |
9564 | first_reusable_row to the end of the window. Set | |
9565 | first_row_to_display to the first row that cannot be reused. | |
9566 | Set pt_row to the row containing point, if there is any. */ | |
9567 | first_row_to_display = first_reusable_row; | |
9568 | pt_row = NULL; | |
9569 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
9570 | { | |
9571 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
9572 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
9573 | pt_row = first_row_to_display; | |
a2889657 | 9574 | |
5f5c8ee5 GM |
9575 | ++first_row_to_display; |
9576 | } | |
a2889657 | 9577 | |
5f5c8ee5 GM |
9578 | /* Start displaying at the start of first_row_to_display. */ |
9579 | xassert (first_row_to_display->y < yb); | |
9580 | init_to_row_start (&it, w, first_row_to_display); | |
9581 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
9582 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
9583 | - nrows_scrolled); | |
9584 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
9585 | ||
9586 | /* Display lines beginning with first_row_to_display in the | |
9587 | desired matrix. Set last_text_row to the last row displayed | |
9588 | that displays text. */ | |
9589 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
9590 | if (pt_row == NULL) | |
9591 | w->cursor.vpos = -1; | |
9592 | last_text_row = NULL; | |
9593 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
9594 | if (display_line (&it)) | |
9595 | last_text_row = it.glyph_row - 1; | |
9596 | ||
9597 | /* Give up If point isn't in a row displayed or reused. */ | |
9598 | if (w->cursor.vpos < 0) | |
9599 | { | |
9600 | clear_glyph_matrix (w->desired_matrix); | |
9601 | return 0; | |
9602 | } | |
12adba34 | 9603 | |
5f5c8ee5 GM |
9604 | /* If point is in a reused row, adjust y and vpos of the cursor |
9605 | position. */ | |
9606 | if (pt_row) | |
9607 | { | |
9608 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
9609 | w->current_matrix); | |
9610 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
9611 | } |
9612 | ||
5f5c8ee5 GM |
9613 | /* Scroll the display. */ |
9614 | run.current_y = first_reusable_row->y; | |
045dee35 | 9615 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9616 | run.height = it.last_visible_y - run.current_y; |
9617 | if (run.height) | |
9618 | { | |
9619 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
9620 | update_begin (f); | |
9621 | rif->update_window_begin_hook (w); | |
9622 | rif->scroll_run_hook (w, &run); | |
9623 | rif->update_window_end_hook (w, 0); | |
9624 | update_end (f); | |
9625 | } | |
a2889657 | 9626 | |
5f5c8ee5 GM |
9627 | /* Adjust Y positions of reused rows. */ |
9628 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9629 | row = first_reusable_row; | |
9630 | dy = first_reusable_row->y; | |
045dee35 | 9631 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9632 | max_y = it.last_visible_y; |
9633 | while (row < first_row_to_display) | |
9634 | { | |
9635 | row->y -= dy; | |
9636 | if (row->y < min_y) | |
9637 | row->visible_height = row->height - (min_y - row->y); | |
9638 | else if (row->y + row->height > max_y) | |
9639 | row->visible_height | |
9640 | = row->height - (row->y + row->height - max_y); | |
9641 | else | |
9642 | row->visible_height = row->height; | |
9643 | ++row; | |
9644 | } | |
a2889657 | 9645 | |
5f5c8ee5 GM |
9646 | /* Disable rows not reused. */ |
9647 | while (row < bottom_row) | |
9648 | { | |
9649 | row->enabled_p = 0; | |
9650 | ++row; | |
9651 | } | |
9652 | ||
9653 | /* Scroll the current matrix. */ | |
9654 | xassert (nrows_scrolled > 0); | |
9655 | rotate_matrix (w->current_matrix, | |
9656 | start_vpos, | |
9657 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9658 | -nrows_scrolled); | |
9659 | ||
9660 | /* Adjust window end. A null value of last_text_row means that | |
9661 | the window end is in reused rows which in turn means that | |
9662 | only its vpos can have changed. */ | |
9663 | if (last_text_row) | |
9664 | { | |
9665 | w->window_end_bytepos | |
9666 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9667 | XSETFASTINT (w->window_end_pos, | |
9668 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9669 | XSETFASTINT (w->window_end_vpos, | |
9670 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9671 | } | |
9672 | else | |
a2889657 | 9673 | { |
e8e536a9 | 9674 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 9675 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 9676 | } |
5f5c8ee5 GM |
9677 | |
9678 | w->window_end_valid = Qnil; | |
9679 | w->desired_matrix->no_scrolling_p = 1; | |
9680 | ||
9681 | #if GLYPH_DEBUG | |
9682 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
9683 | #endif | |
9684 | return 1; | |
a2889657 | 9685 | } |
5f5c8ee5 GM |
9686 | |
9687 | return 0; | |
9688 | } | |
a2889657 | 9689 | |
a2889657 | 9690 | |
5f5c8ee5 GM |
9691 | \f |
9692 | /************************************************************************ | |
9693 | Window redisplay reusing current matrix when buffer has changed | |
9694 | ************************************************************************/ | |
9695 | ||
9696 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
9697 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
9698 | int *, int *)); | |
9699 | static struct glyph_row * | |
9700 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
9701 | struct glyph_row *)); | |
9702 | ||
9703 | ||
9704 | /* Return the last row in MATRIX displaying text. If row START is | |
9705 | non-null, start searching with that row. IT gives the dimensions | |
9706 | of the display. Value is null if matrix is empty; otherwise it is | |
9707 | a pointer to the row found. */ | |
9708 | ||
9709 | static struct glyph_row * | |
9710 | find_last_row_displaying_text (matrix, it, start) | |
9711 | struct glyph_matrix *matrix; | |
9712 | struct it *it; | |
9713 | struct glyph_row *start; | |
9714 | { | |
9715 | struct glyph_row *row, *row_found; | |
9716 | ||
9717 | /* Set row_found to the last row in IT->w's current matrix | |
9718 | displaying text. The loop looks funny but think of partially | |
9719 | visible lines. */ | |
9720 | row_found = NULL; | |
9721 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
9722 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9723 | { | |
9724 | xassert (row->enabled_p); | |
9725 | row_found = row; | |
9726 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
9727 | break; | |
9728 | ++row; | |
a2889657 | 9729 | } |
5f5c8ee5 GM |
9730 | |
9731 | return row_found; | |
9732 | } | |
9733 | ||
a2889657 | 9734 | |
5f5c8ee5 GM |
9735 | /* Return the last row in the current matrix of W that is not affected |
9736 | by changes at the start of current_buffer that occurred since the | |
9737 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 9738 | |
5f5c8ee5 GM |
9739 | The global variable beg_unchanged has to contain the number of |
9740 | bytes unchanged at the start of current_buffer. BEG + | |
9741 | beg_unchanged is the buffer position of the first changed byte in | |
9742 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
9743 | at the same buffer positions as they were when the current matrix | |
9744 | was built. */ | |
9745 | ||
9746 | static struct glyph_row * | |
9747 | get_last_unchanged_at_beg_row (w) | |
9748 | struct window *w; | |
9749 | { | |
9142dd5b | 9750 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
9751 | struct glyph_row *row; |
9752 | struct glyph_row *row_found = NULL; | |
9753 | int yb = window_text_bottom_y (w); | |
9754 | ||
9755 | /* Find the last row displaying unchanged text. */ | |
9756 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9757 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
9758 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 9759 | { |
5f5c8ee5 GM |
9760 | if (/* If row ends before first_changed_pos, it is unchanged, |
9761 | except in some case. */ | |
9762 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
9763 | /* When row ends in ZV and we write at ZV it is not | |
9764 | unchanged. */ | |
9765 | && !row->ends_at_zv_p | |
9766 | /* When first_changed_pos is the end of a continued line, | |
9767 | row is not unchanged because it may be no longer | |
9768 | continued. */ | |
9769 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
9770 | && row->continued_p)) | |
9771 | row_found = row; | |
9772 | ||
9773 | /* Stop if last visible row. */ | |
9774 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
9775 | break; | |
9776 | ||
9777 | ++row; | |
a2889657 JB |
9778 | } |
9779 | ||
5f5c8ee5 | 9780 | return row_found; |
a2889657 | 9781 | } |
5f5c8ee5 GM |
9782 | |
9783 | ||
9784 | /* Find the first glyph row in the current matrix of W that is not | |
9785 | affected by changes at the end of current_buffer since the last | |
9786 | time the window was redisplayed. Return in *DELTA the number of | |
c59c668a GM |
9787 | chars by which buffer positions in unchanged text at the end of |
9788 | current_buffer must be adjusted. Return in *DELTA_BYTES the | |
9789 | corresponding number of bytes. Value is null if no such row | |
9790 | exists, i.e. all rows are affected by changes. */ | |
5f5c8ee5 GM |
9791 | |
9792 | static struct glyph_row * | |
9793 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
9794 | struct window *w; | |
9795 | int *delta, *delta_bytes; | |
a2889657 | 9796 | { |
5f5c8ee5 GM |
9797 | struct glyph_row *row; |
9798 | struct glyph_row *row_found = NULL; | |
c581d710 | 9799 | |
5f5c8ee5 | 9800 | *delta = *delta_bytes = 0; |
b2a76982 | 9801 | |
5f5c8ee5 GM |
9802 | /* A value of window_end_pos >= end_unchanged means that the window |
9803 | end is in the range of changed text. If so, there is no | |
9804 | unchanged row at the end of W's current matrix. */ | |
9805 | xassert (!NILP (w->window_end_valid)); | |
9142dd5b | 9806 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
9807 | return NULL; |
9808 | ||
9809 | /* Set row to the last row in W's current matrix displaying text. */ | |
9810 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9811 | ||
5f5c8ee5 GM |
9812 | /* If matrix is entirely empty, no unchanged row exists. */ |
9813 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9814 | { | |
9815 | /* The value of row is the last glyph row in the matrix having a | |
9816 | meaningful buffer position in it. The end position of row | |
9817 | corresponds to window_end_pos. This allows us to translate | |
9818 | buffer positions in the current matrix to current buffer | |
9819 | positions for characters not in changed text. */ | |
9820 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
9821 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
9822 | int last_unchanged_pos, last_unchanged_pos_old; | |
9823 | struct glyph_row *first_text_row | |
9824 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9825 | ||
9826 | *delta = Z - Z_old; | |
9827 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
9828 | ||
9829 | /* Set last_unchanged_pos to the buffer position of the last | |
9830 | character in the buffer that has not been changed. Z is the | |
9831 | index + 1 of the last byte in current_buffer, i.e. by | |
9832 | subtracting end_unchanged we get the index of the last | |
9833 | unchanged character, and we have to add BEG to get its buffer | |
9834 | position. */ | |
9142dd5b | 9835 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
9836 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
9837 | ||
9838 | /* Search backward from ROW for a row displaying a line that | |
9839 | starts at a minimum position >= last_unchanged_pos_old. */ | |
9840 | while (row >= first_text_row) | |
9841 | { | |
9842 | xassert (row->enabled_p); | |
9843 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9844 | ||
9845 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
9846 | row_found = row; | |
9847 | --row; | |
9848 | } | |
9849 | } | |
9850 | ||
9851 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
9852 | return row_found; | |
c581d710 RS |
9853 | } |
9854 | ||
c581d710 | 9855 | |
5f5c8ee5 GM |
9856 | /* Make sure that glyph rows in the current matrix of window W |
9857 | reference the same glyph memory as corresponding rows in the | |
9858 | frame's frame matrix. This function is called after scrolling W's | |
9859 | current matrix on a terminal frame in try_window_id and | |
9860 | try_window_reusing_current_matrix. */ | |
9861 | ||
9862 | static void | |
9863 | sync_frame_with_window_matrix_rows (w) | |
9864 | struct window *w; | |
c581d710 | 9865 | { |
5f5c8ee5 GM |
9866 | struct frame *f = XFRAME (w->frame); |
9867 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
9868 | ||
9869 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
9870 | must have a frame matrix. */ | |
9871 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
9872 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
9873 | xassert (!FRAME_WINDOW_P (f)); | |
9874 | ||
9875 | /* If W is a full-width window, glyph pointers in W's current matrix | |
9876 | have, by definition, to be the same as glyph pointers in the | |
9877 | corresponding frame matrix. */ | |
9878 | window_row = w->current_matrix->rows; | |
9879 | window_row_end = window_row + w->current_matrix->nrows; | |
9880 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
9881 | while (window_row < window_row_end) | |
659a218f | 9882 | { |
5f5c8ee5 | 9883 | int area; |
f002db93 | 9884 | |
5f5c8ee5 GM |
9885 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) |
9886 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
f002db93 GM |
9887 | |
9888 | /* Disable frame rows whose corresponding window rows have | |
9889 | been disabled in try_window_id. */ | |
9890 | if (!window_row->enabled_p) | |
9891 | frame_row->enabled_p = 0; | |
9892 | ||
5f5c8ee5 | 9893 | ++window_row, ++frame_row; |
659a218f | 9894 | } |
a2889657 | 9895 | } |
5f5c8ee5 GM |
9896 | |
9897 | ||
e037b9ec GM |
9898 | /* Find the glyph row in window W containing CHARPOS. Consider all |
9899 | rows between START and END (not inclusive). END null means search | |
9900 | all rows to the end of the display area of W. Value is the row | |
9901 | containing CHARPOS or null. */ | |
9902 | ||
9903 | static struct glyph_row * | |
9904 | row_containing_pos (w, charpos, start, end) | |
9905 | struct window *w; | |
9906 | int charpos; | |
9907 | struct glyph_row *start, *end; | |
9908 | { | |
9909 | struct glyph_row *row = start; | |
9910 | int last_y; | |
9911 | ||
9912 | /* If we happen to start on a header-line, skip that. */ | |
9913 | if (row->mode_line_p) | |
9914 | ++row; | |
9915 | ||
9916 | if ((end && row >= end) || !row->enabled_p) | |
9917 | return NULL; | |
9918 | ||
9919 | last_y = window_text_bottom_y (w); | |
9920 | ||
9921 | while ((end == NULL || row < end) | |
9922 | && (MATRIX_ROW_END_CHARPOS (row) < charpos | |
9923 | /* The end position of a row equals the start | |
9924 | position of the next row. If CHARPOS is there, we | |
9925 | would rather display it in the next line, except | |
9926 | when this line ends in ZV. */ | |
9927 | || (MATRIX_ROW_END_CHARPOS (row) == charpos | |
9928 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
9929 | || !row->ends_at_zv_p))) | |
9930 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
9931 | ++row; | |
9932 | ||
9933 | /* Give up if CHARPOS not found. */ | |
9934 | if ((end && row >= end) | |
9935 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
9936 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
9937 | row = NULL; | |
9938 | ||
9939 | return row; | |
9940 | } | |
9941 | ||
9942 | ||
5f5c8ee5 GM |
9943 | /* Try to redisplay window W by reusing its existing display. W's |
9944 | current matrix must be up to date when this function is called, | |
9945 | i.e. window_end_valid must not be nil. | |
9946 | ||
9947 | Value is | |
9948 | ||
9949 | 1 if display has been updated | |
9950 | 0 if otherwise unsuccessful | |
9951 | -1 if redisplay with same window start is known not to succeed | |
9952 | ||
9953 | The following steps are performed: | |
9954 | ||
9955 | 1. Find the last row in the current matrix of W that is not | |
9956 | affected by changes at the start of current_buffer. If no such row | |
9957 | is found, give up. | |
9958 | ||
9959 | 2. Find the first row in W's current matrix that is not affected by | |
9960 | changes at the end of current_buffer. Maybe there is no such row. | |
9961 | ||
9962 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
9963 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
9964 | the window. | |
9965 | ||
9966 | 4. If cursor is not known to appear on the window, give up. | |
9967 | ||
9968 | 5. If display stopped at the row found in step 2, scroll the | |
9969 | display and current matrix as needed. | |
9970 | ||
9971 | 6. Maybe display some lines at the end of W, if we must. This can | |
9972 | happen under various circumstances, like a partially visible line | |
9973 | becoming fully visible, or because newly displayed lines are displayed | |
9974 | in smaller font sizes. | |
9975 | ||
9976 | 7. Update W's window end information. */ | |
9977 | ||
9978 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
9979 | |
9980 | static int | |
5f5c8ee5 | 9981 | try_window_id (w) |
12adba34 | 9982 | struct window *w; |
12adba34 | 9983 | { |
5f5c8ee5 GM |
9984 | struct frame *f = XFRAME (w->frame); |
9985 | struct glyph_matrix *current_matrix = w->current_matrix; | |
9986 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
9987 | struct glyph_row *last_unchanged_at_beg_row; | |
9988 | struct glyph_row *first_unchanged_at_end_row; | |
9989 | struct glyph_row *row; | |
9990 | struct glyph_row *bottom_row; | |
9991 | int bottom_vpos; | |
9992 | struct it it; | |
9993 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
9994 | struct text_pos start_pos; | |
9995 | struct run run; | |
9996 | int first_unchanged_at_end_vpos = 0; | |
9997 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
9998 | struct text_pos start; | |
9999 | ||
10000 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
10001 | ||
10002 | /* Check pre-conditions. Window end must be valid, otherwise | |
10003 | the current matrix would not be up to date. */ | |
10004 | xassert (!NILP (w->window_end_valid)); | |
10005 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
10006 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
10007 | ||
10008 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
10009 | only if buffer has really changed. The reason is that the gap is | |
10010 | initially at Z for freshly visited files. The code below would | |
10011 | set end_unchanged to 0 in that case. */ | |
28ee91c0 GM |
10012 | if (MODIFF > SAVE_MODIFF |
10013 | /* This seems to happen sometimes after saving a buffer. */ | |
10014 | || BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
5f5c8ee5 | 10015 | { |
9142dd5b GM |
10016 | if (GPT - BEG < BEG_UNCHANGED) |
10017 | BEG_UNCHANGED = GPT - BEG; | |
10018 | if (Z - GPT < END_UNCHANGED) | |
10019 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 10020 | } |
bf9249e3 | 10021 | |
5f5c8ee5 GM |
10022 | /* If window starts after a line end, and the last change is in |
10023 | front of that newline, then changes don't affect the display. | |
10024 | This case happens with stealth-fontification. */ | |
10025 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
10026 | if (CHARPOS (start) > BEGV | |
9142dd5b | 10027 | && Z - END_UNCHANGED < CHARPOS (start) - 1 |
5f5c8ee5 GM |
10028 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' |
10029 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
10030 | { | |
10031 | /* We have to update window end positions because the buffer's | |
10032 | size has changed. */ | |
10033 | w->window_end_pos | |
10034 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
10035 | w->window_end_bytepos | |
10036 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
10037 | return 1; | |
10038 | } | |
10039 | ||
10040 | /* Return quickly if changes are all below what is displayed in the | |
10041 | window, and if PT is in the window. */ | |
9142dd5b | 10042 | if (BEG_UNCHANGED > MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 GM |
10043 | && PT < MATRIX_ROW_END_CHARPOS (row)) |
10044 | { | |
10045 | /* We have to update window end positions because the buffer's | |
10046 | size has changed. */ | |
10047 | w->window_end_pos | |
10048 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
10049 | w->window_end_bytepos | |
10050 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
10051 | return 1; | |
10052 | } | |
10053 | ||
10054 | /* Check that window start agrees with the start of the first glyph | |
10055 | row in its current matrix. Check this after we know the window | |
10056 | start is not in changed text, otherwise positions would not be | |
10057 | comparable. */ | |
10058 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10059 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
10060 | return 0; | |
10061 | ||
5f5c8ee5 GM |
10062 | /* Compute the position at which we have to start displaying new |
10063 | lines. Some of the lines at the top of the window might be | |
10064 | reusable because they are not displaying changed text. Find the | |
10065 | last row in W's current matrix not affected by changes at the | |
10066 | start of current_buffer. Value is null if changes start in the | |
10067 | first line of window. */ | |
10068 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
10069 | if (last_unchanged_at_beg_row) | |
10070 | { | |
10071 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
10072 | start_pos = it.current.pos; | |
10073 | ||
10074 | /* Start displaying new lines in the desired matrix at the same | |
10075 | vpos we would use in the current matrix, i.e. below | |
10076 | last_unchanged_at_beg_row. */ | |
10077 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
10078 | current_matrix); | |
10079 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10080 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
10081 | ||
10082 | xassert (it.hpos == 0 && it.current_x == 0); | |
10083 | } | |
10084 | else | |
10085 | { | |
10086 | /* There are no reusable lines at the start of the window. | |
10087 | Start displaying in the first line. */ | |
10088 | start_display (&it, w, start); | |
10089 | start_pos = it.current.pos; | |
10090 | } | |
10091 | ||
5f5c8ee5 GM |
10092 | /* Find the first row that is not affected by changes at the end of |
10093 | the buffer. Value will be null if there is no unchanged row, in | |
10094 | which case we must redisplay to the end of the window. delta | |
10095 | will be set to the value by which buffer positions beginning with | |
10096 | first_unchanged_at_end_row have to be adjusted due to text | |
10097 | changes. */ | |
10098 | first_unchanged_at_end_row | |
10099 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
10100 | IF_DEBUG (debug_delta = delta); | |
10101 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
10102 | ||
10103 | /* Set stop_pos to the buffer position up to which we will have to | |
10104 | display new lines. If first_unchanged_at_end_row != NULL, this | |
10105 | is the buffer position of the start of the line displayed in that | |
10106 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
10107 | that we don't stop at a buffer position. */ | |
10108 | stop_pos = 0; | |
10109 | if (first_unchanged_at_end_row) | |
10110 | { | |
10111 | xassert (last_unchanged_at_beg_row == NULL | |
10112 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
10113 | ||
10114 | /* If this is a continuation line, move forward to the next one | |
10115 | that isn't. Changes in lines above affect this line. | |
10116 | Caution: this may move first_unchanged_at_end_row to a row | |
10117 | not displaying text. */ | |
10118 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
10119 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
10120 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
10121 | < it.last_visible_y)) | |
10122 | ++first_unchanged_at_end_row; | |
10123 | ||
10124 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
10125 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
10126 | >= it.last_visible_y)) | |
10127 | first_unchanged_at_end_row = NULL; | |
10128 | else | |
10129 | { | |
10130 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
10131 | + delta); | |
10132 | first_unchanged_at_end_vpos | |
10133 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 10134 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
10135 | } |
10136 | } | |
10137 | else if (last_unchanged_at_beg_row == NULL) | |
10138 | return 0; | |
10139 | ||
10140 | ||
10141 | #if GLYPH_DEBUG | |
10142 | ||
10143 | /* Either there is no unchanged row at the end, or the one we have | |
10144 | now displays text. This is a necessary condition for the window | |
10145 | end pos calculation at the end of this function. */ | |
10146 | xassert (first_unchanged_at_end_row == NULL | |
10147 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
10148 | ||
10149 | debug_last_unchanged_at_beg_vpos | |
10150 | = (last_unchanged_at_beg_row | |
10151 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
10152 | : -1); | |
10153 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
10154 | ||
10155 | #endif /* GLYPH_DEBUG != 0 */ | |
10156 | ||
10157 | ||
10158 | /* Display new lines. Set last_text_row to the last new line | |
10159 | displayed which has text on it, i.e. might end up as being the | |
10160 | line where the window_end_vpos is. */ | |
10161 | w->cursor.vpos = -1; | |
10162 | last_text_row = NULL; | |
10163 | overlay_arrow_seen = 0; | |
10164 | while (it.current_y < it.last_visible_y | |
10165 | && !fonts_changed_p | |
10166 | && (first_unchanged_at_end_row == NULL | |
10167 | || IT_CHARPOS (it) < stop_pos)) | |
10168 | { | |
10169 | if (display_line (&it)) | |
10170 | last_text_row = it.glyph_row - 1; | |
10171 | } | |
10172 | ||
10173 | if (fonts_changed_p) | |
10174 | return -1; | |
10175 | ||
10176 | ||
10177 | /* Compute differences in buffer positions, y-positions etc. for | |
10178 | lines reused at the bottom of the window. Compute what we can | |
10179 | scroll. */ | |
ca42b2e8 GM |
10180 | if (first_unchanged_at_end_row |
10181 | /* No lines reused because we displayed everything up to the | |
10182 | bottom of the window. */ | |
10183 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
10184 | { |
10185 | dvpos = (it.vpos | |
10186 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
10187 | current_matrix)); | |
10188 | dy = it.current_y - first_unchanged_at_end_row->y; | |
10189 | run.current_y = first_unchanged_at_end_row->y; | |
10190 | run.desired_y = run.current_y + dy; | |
10191 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
10192 | } | |
10193 | else | |
ca42b2e8 GM |
10194 | { |
10195 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
10196 | first_unchanged_at_end_row = NULL; | |
10197 | } | |
5f5c8ee5 GM |
10198 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
10199 | ||
8f8ba186 | 10200 | |
5f5c8ee5 GM |
10201 | /* Find the cursor if not already found. We have to decide whether |
10202 | PT will appear on this window (it sometimes doesn't, but this is | |
10203 | not a very frequent case.) This decision has to be made before | |
10204 | the current matrix is altered. A value of cursor.vpos < 0 means | |
10205 | that PT is either in one of the lines beginning at | |
10206 | first_unchanged_at_end_row or below the window. Don't care for | |
10207 | lines that might be displayed later at the window end; as | |
10208 | mentioned, this is not a frequent case. */ | |
10209 | if (w->cursor.vpos < 0) | |
10210 | { | |
5f5c8ee5 GM |
10211 | /* Cursor in unchanged rows at the top? */ |
10212 | if (PT < CHARPOS (start_pos) | |
10213 | && last_unchanged_at_beg_row) | |
10214 | { | |
e037b9ec GM |
10215 | row = row_containing_pos (w, PT, |
10216 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
10217 | last_unchanged_at_beg_row + 1); | |
10218 | xassert (row && row <= last_unchanged_at_beg_row); | |
5f5c8ee5 GM |
10219 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); |
10220 | } | |
10221 | ||
10222 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
10223 | else if (first_unchanged_at_end_row) | |
10224 | { | |
e037b9ec GM |
10225 | row = row_containing_pos (w, PT - delta, |
10226 | first_unchanged_at_end_row, NULL); | |
10227 | if (row) | |
468155d7 GM |
10228 | set_cursor_from_row (w, row, w->current_matrix, delta, |
10229 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
10230 | } |
10231 | ||
10232 | /* Give up if cursor was not found. */ | |
10233 | if (w->cursor.vpos < 0) | |
10234 | { | |
10235 | clear_glyph_matrix (w->desired_matrix); | |
10236 | return -1; | |
10237 | } | |
10238 | } | |
10239 | ||
10240 | /* Don't let the cursor end in the scroll margins. */ | |
10241 | { | |
10242 | int this_scroll_margin, cursor_height; | |
10243 | ||
10244 | this_scroll_margin = max (0, scroll_margin); | |
10245 | this_scroll_margin = min (this_scroll_margin, | |
10246 | XFASTINT (w->height) / 4); | |
10247 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
10248 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
10249 | ||
10250 | if ((w->cursor.y < this_scroll_margin | |
10251 | && CHARPOS (start) > BEGV) | |
10252 | /* Don't take scroll margin into account at the bottom because | |
10253 | old redisplay didn't do it either. */ | |
10254 | || w->cursor.y + cursor_height > it.last_visible_y) | |
10255 | { | |
10256 | w->cursor.vpos = -1; | |
10257 | clear_glyph_matrix (w->desired_matrix); | |
10258 | return -1; | |
10259 | } | |
10260 | } | |
10261 | ||
10262 | /* Scroll the display. Do it before changing the current matrix so | |
10263 | that xterm.c doesn't get confused about where the cursor glyph is | |
10264 | found. */ | |
10265 | if (dy) | |
10266 | { | |
10267 | update_begin (f); | |
10268 | ||
10269 | if (FRAME_WINDOW_P (f)) | |
10270 | { | |
10271 | rif->update_window_begin_hook (w); | |
10272 | rif->scroll_run_hook (w, &run); | |
10273 | rif->update_window_end_hook (w, 0); | |
10274 | } | |
10275 | else | |
10276 | { | |
10277 | /* Terminal frame. In this case, dvpos gives the number of | |
10278 | lines to scroll by; dvpos < 0 means scroll up. */ | |
10279 | int first_unchanged_at_end_vpos | |
10280 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
10281 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
10282 | int end = XFASTINT (w->top) + window_internal_height (w); | |
10283 | ||
10284 | /* Perform the operation on the screen. */ | |
10285 | if (dvpos > 0) | |
10286 | { | |
10287 | /* Scroll last_unchanged_at_beg_row to the end of the | |
10288 | window down dvpos lines. */ | |
10289 | set_terminal_window (end); | |
10290 | ||
10291 | /* On dumb terminals delete dvpos lines at the end | |
10292 | before inserting dvpos empty lines. */ | |
10293 | if (!scroll_region_ok) | |
10294 | ins_del_lines (end - dvpos, -dvpos); | |
10295 | ||
10296 | /* Insert dvpos empty lines in front of | |
10297 | last_unchanged_at_beg_row. */ | |
10298 | ins_del_lines (from, dvpos); | |
10299 | } | |
10300 | else if (dvpos < 0) | |
10301 | { | |
10302 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
10303 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
10304 | set_terminal_window (end); | |
10305 | ||
10306 | /* Delete dvpos lines in front of | |
10307 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
10308 | the cursor to the given vpos and emit |dvpos| delete | |
10309 | line sequences. */ | |
10310 | ins_del_lines (from + dvpos, dvpos); | |
10311 | ||
10312 | /* On a dumb terminal insert dvpos empty lines at the | |
10313 | end. */ | |
10314 | if (!scroll_region_ok) | |
10315 | ins_del_lines (end + dvpos, -dvpos); | |
10316 | } | |
10317 | ||
10318 | set_terminal_window (0); | |
10319 | } | |
10320 | ||
10321 | update_end (f); | |
10322 | } | |
10323 | ||
ca42b2e8 GM |
10324 | /* Shift reused rows of the current matrix to the right position. |
10325 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
10326 | text. */ | |
10327 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
10328 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
10329 | if (dvpos < 0) |
10330 | { | |
10331 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
10332 | bottom_vpos, dvpos); | |
10333 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
10334 | bottom_vpos, 0); | |
10335 | } | |
10336 | else if (dvpos > 0) | |
10337 | { | |
10338 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
10339 | bottom_vpos, dvpos); | |
10340 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
10341 | first_unchanged_at_end_vpos + dvpos, 0); | |
10342 | } | |
10343 | ||
10344 | /* For frame-based redisplay, make sure that current frame and window | |
10345 | matrix are in sync with respect to glyph memory. */ | |
10346 | if (!FRAME_WINDOW_P (f)) | |
10347 | sync_frame_with_window_matrix_rows (w); | |
10348 | ||
10349 | /* Adjust buffer positions in reused rows. */ | |
10350 | if (delta) | |
10351 | increment_glyph_matrix_buffer_positions (current_matrix, | |
10352 | first_unchanged_at_end_vpos + dvpos, | |
10353 | bottom_vpos, delta, delta_bytes); | |
10354 | ||
10355 | /* Adjust Y positions. */ | |
10356 | if (dy) | |
10357 | shift_glyph_matrix (w, current_matrix, | |
10358 | first_unchanged_at_end_vpos + dvpos, | |
10359 | bottom_vpos, dy); | |
10360 | ||
10361 | if (first_unchanged_at_end_row) | |
10362 | first_unchanged_at_end_row += dvpos; | |
10363 | ||
10364 | /* If scrolling up, there may be some lines to display at the end of | |
10365 | the window. */ | |
10366 | last_text_row_at_end = NULL; | |
10367 | if (dy < 0) | |
10368 | { | |
10369 | /* Set last_row to the glyph row in the current matrix where the | |
10370 | window end line is found. It has been moved up or down in | |
10371 | the matrix by dvpos. */ | |
10372 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
10373 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
10374 | ||
10375 | /* If last_row is the window end line, it should display text. */ | |
10376 | xassert (last_row->displays_text_p); | |
10377 | ||
10378 | /* If window end line was partially visible before, begin | |
10379 | displaying at that line. Otherwise begin displaying with the | |
10380 | line following it. */ | |
10381 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
10382 | { | |
10383 | init_to_row_start (&it, w, last_row); | |
10384 | it.vpos = last_vpos; | |
10385 | it.current_y = last_row->y; | |
10386 | } | |
10387 | else | |
10388 | { | |
10389 | init_to_row_end (&it, w, last_row); | |
10390 | it.vpos = 1 + last_vpos; | |
10391 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
10392 | ++last_row; | |
10393 | } | |
12adba34 | 10394 | |
5f5c8ee5 GM |
10395 | /* We may start in a continuation line. If so, we have to get |
10396 | the right continuation_lines_width and current_x. */ | |
10397 | it.continuation_lines_width = last_row->continuation_lines_width; | |
10398 | it.hpos = it.current_x = 0; | |
10399 | ||
10400 | /* Display the rest of the lines at the window end. */ | |
10401 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10402 | while (it.current_y < it.last_visible_y | |
10403 | && !fonts_changed_p) | |
10404 | { | |
10405 | /* Is it always sure that the display agrees with lines in | |
10406 | the current matrix? I don't think so, so we mark rows | |
10407 | displayed invalid in the current matrix by setting their | |
10408 | enabled_p flag to zero. */ | |
10409 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
10410 | if (display_line (&it)) | |
10411 | last_text_row_at_end = it.glyph_row - 1; | |
10412 | } | |
10413 | } | |
12adba34 | 10414 | |
5f5c8ee5 GM |
10415 | /* Update window_end_pos and window_end_vpos. */ |
10416 | if (first_unchanged_at_end_row | |
10417 | && first_unchanged_at_end_row->y < it.last_visible_y | |
10418 | && !last_text_row_at_end) | |
10419 | { | |
10420 | /* Window end line if one of the preserved rows from the current | |
10421 | matrix. Set row to the last row displaying text in current | |
10422 | matrix starting at first_unchanged_at_end_row, after | |
10423 | scrolling. */ | |
10424 | xassert (first_unchanged_at_end_row->displays_text_p); | |
10425 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
10426 | first_unchanged_at_end_row); | |
10427 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
10428 | ||
10429 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
10430 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
10431 | XSETFASTINT (w->window_end_vpos, | |
10432 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
10433 | } | |
10434 | else if (last_text_row_at_end) | |
10435 | { | |
10436 | XSETFASTINT (w->window_end_pos, | |
10437 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
10438 | w->window_end_bytepos | |
10439 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
10440 | XSETFASTINT (w->window_end_vpos, | |
10441 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
10442 | } | |
10443 | else if (last_text_row) | |
10444 | { | |
10445 | /* We have displayed either to the end of the window or at the | |
10446 | end of the window, i.e. the last row with text is to be found | |
10447 | in the desired matrix. */ | |
10448 | XSETFASTINT (w->window_end_pos, | |
10449 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10450 | w->window_end_bytepos | |
10451 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
10452 | XSETFASTINT (w->window_end_vpos, | |
10453 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
10454 | } | |
10455 | else if (first_unchanged_at_end_row == NULL | |
10456 | && last_text_row == NULL | |
10457 | && last_text_row_at_end == NULL) | |
10458 | { | |
10459 | /* Displayed to end of window, but no line containing text was | |
10460 | displayed. Lines were deleted at the end of the window. */ | |
10461 | int vpos; | |
045dee35 | 10462 | int header_line_p = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
10463 | |
10464 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
045dee35 GM |
10465 | if ((w->desired_matrix->rows[vpos + header_line_p].enabled_p |
10466 | && w->desired_matrix->rows[vpos + header_line_p].displays_text_p) | |
10467 | || (!w->desired_matrix->rows[vpos + header_line_p].enabled_p | |
10468 | && w->current_matrix->rows[vpos + header_line_p].displays_text_p)) | |
5f5c8ee5 | 10469 | break; |
12adba34 | 10470 | |
5f5c8ee5 GM |
10471 | w->window_end_vpos = make_number (vpos); |
10472 | } | |
10473 | else | |
10474 | abort (); | |
10475 | ||
10476 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
10477 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 10478 | |
5f5c8ee5 GM |
10479 | /* Record that display has not been completed. */ |
10480 | w->window_end_valid = Qnil; | |
10481 | w->desired_matrix->no_scrolling_p = 1; | |
10482 | return 1; | |
12adba34 | 10483 | } |
0f9c0ff0 | 10484 | |
a2889657 | 10485 | |
5f5c8ee5 GM |
10486 | \f |
10487 | /*********************************************************************** | |
10488 | More debugging support | |
10489 | ***********************************************************************/ | |
a2889657 | 10490 | |
5f5c8ee5 | 10491 | #if GLYPH_DEBUG |
a2889657 | 10492 | |
5f5c8ee5 GM |
10493 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
10494 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 10495 | |
31b24551 | 10496 | |
5f5c8ee5 GM |
10497 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
10498 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 10499 | |
5f5c8ee5 GM |
10500 | void |
10501 | dump_glyph_matrix (matrix, with_glyphs_p) | |
10502 | struct glyph_matrix *matrix; | |
10503 | int with_glyphs_p; | |
10504 | { | |
efc63ef0 | 10505 | int i; |
5f5c8ee5 GM |
10506 | for (i = 0; i < matrix->nrows; ++i) |
10507 | dump_glyph_row (matrix, i, with_glyphs_p); | |
10508 | } | |
31b24551 | 10509 | |
68a37fa8 | 10510 | |
5f5c8ee5 GM |
10511 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
10512 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 10513 | |
5f5c8ee5 GM |
10514 | void |
10515 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
10516 | struct glyph_matrix *matrix; | |
10517 | int vpos, with_glyphs_p; | |
10518 | { | |
10519 | struct glyph_row *row; | |
10520 | ||
10521 | if (vpos < 0 || vpos >= matrix->nrows) | |
10522 | return; | |
10523 | ||
10524 | row = MATRIX_ROW (matrix, vpos); | |
10525 | ||
10526 | fprintf (stderr, "Row Start End Used oEI><O\\CTZF X Y W\n"); | |
10527 | fprintf (stderr, "=============================================\n"); | |
10528 | ||
10529 | fprintf (stderr, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d\n", | |
10530 | row - matrix->rows, | |
10531 | MATRIX_ROW_START_CHARPOS (row), | |
10532 | MATRIX_ROW_END_CHARPOS (row), | |
10533 | row->used[TEXT_AREA], | |
10534 | row->contains_overlapping_glyphs_p, | |
10535 | row->enabled_p, | |
10536 | row->inverse_p, | |
10537 | row->truncated_on_left_p, | |
10538 | row->truncated_on_right_p, | |
10539 | row->overlay_arrow_p, | |
10540 | row->continued_p, | |
10541 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
10542 | row->displays_text_p, | |
10543 | row->ends_at_zv_p, | |
10544 | row->fill_line_p, | |
10545 | row->x, | |
10546 | row->y, | |
10547 | row->pixel_width); | |
10548 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, | |
10549 | row->end.overlay_string_index); | |
10550 | fprintf (stderr, "%9d %5d\n", | |
10551 | CHARPOS (row->start.string_pos), | |
10552 | CHARPOS (row->end.string_pos)); | |
10553 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
10554 | row->end.dpvec_index); | |
10555 | ||
10556 | if (with_glyphs_p) | |
bd66d1ba | 10557 | { |
5f5c8ee5 GM |
10558 | struct glyph *glyph, *glyph_end; |
10559 | int prev_had_glyphs_p; | |
10560 | ||
10561 | glyph = row->glyphs[TEXT_AREA]; | |
10562 | glyph_end = glyph + row->used[TEXT_AREA]; | |
10563 | ||
10564 | /* Glyph for a line end in text. */ | |
10565 | if (glyph == glyph_end && glyph->charpos > 0) | |
10566 | ++glyph_end; | |
10567 | ||
10568 | if (glyph < glyph_end) | |
bd66d1ba | 10569 | { |
5f5c8ee5 GM |
10570 | fprintf (stderr, " Glyph Type Pos W Code C Face LR\n"); |
10571 | prev_had_glyphs_p = 1; | |
bd66d1ba RS |
10572 | } |
10573 | else | |
5f5c8ee5 GM |
10574 | prev_had_glyphs_p = 0; |
10575 | ||
10576 | while (glyph < glyph_end) | |
f7b4b63a | 10577 | { |
5f5c8ee5 GM |
10578 | if (glyph->type == CHAR_GLYPH) |
10579 | { | |
10580 | fprintf (stderr, | |
10581 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10582 | glyph - row->glyphs[TEXT_AREA], | |
10583 | 'C', | |
10584 | glyph->charpos, | |
10585 | glyph->pixel_width, | |
43d120d8 KH |
10586 | glyph->u.ch, |
10587 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
10588 | ? glyph->u.ch | |
5f5c8ee5 | 10589 | : '.'), |
43d120d8 | 10590 | glyph->face_id, |
5f5c8ee5 GM |
10591 | glyph->left_box_line_p, |
10592 | glyph->right_box_line_p); | |
10593 | } | |
10594 | else if (glyph->type == STRETCH_GLYPH) | |
10595 | { | |
10596 | fprintf (stderr, | |
10597 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10598 | glyph - row->glyphs[TEXT_AREA], | |
10599 | 'S', | |
10600 | glyph->charpos, | |
10601 | glyph->pixel_width, | |
10602 | 0, | |
10603 | '.', | |
bcdda9a4 | 10604 | glyph->face_id, |
5f5c8ee5 GM |
10605 | glyph->left_box_line_p, |
10606 | glyph->right_box_line_p); | |
10607 | } | |
10608 | else if (glyph->type == IMAGE_GLYPH) | |
10609 | { | |
10610 | fprintf (stderr, | |
10611 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10612 | glyph - row->glyphs[TEXT_AREA], | |
10613 | 'I', | |
10614 | glyph->charpos, | |
10615 | glyph->pixel_width, | |
43d120d8 | 10616 | glyph->u.img_id, |
5f5c8ee5 | 10617 | '.', |
bcdda9a4 | 10618 | glyph->face_id, |
5f5c8ee5 GM |
10619 | glyph->left_box_line_p, |
10620 | glyph->right_box_line_p); | |
10621 | } | |
10622 | ++glyph; | |
f7b4b63a | 10623 | } |
f4faa47c | 10624 | } |
5f5c8ee5 | 10625 | } |
f4faa47c | 10626 | |
a2889657 | 10627 | |
5f5c8ee5 GM |
10628 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
10629 | Sdump_glyph_matrix, 0, 1, "p", | |
10630 | "Dump the current matrix of the selected window to stderr.\n\ | |
10631 | Shows contents of glyph row structures. With non-nil optional\n\ | |
10632 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
10633 | (with_glyphs_p) | |
10634 | { | |
10635 | struct window *w = XWINDOW (selected_window); | |
10636 | struct buffer *buffer = XBUFFER (w->buffer); | |
10637 | ||
10638 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
10639 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
10640 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
10641 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
10642 | fprintf (stderr, "=============================================\n"); | |
10643 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
10644 | return Qnil; | |
10645 | } | |
1c2250c2 | 10646 | |
1fca3fae | 10647 | |
5f5c8ee5 GM |
10648 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
10649 | "Dump glyph row ROW to stderr.") | |
10650 | (row) | |
10651 | Lisp_Object row; | |
10652 | { | |
10653 | CHECK_NUMBER (row, 0); | |
10654 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
10655 | return Qnil; | |
10656 | } | |
1fca3fae | 10657 | |
67481ae5 | 10658 | |
e037b9ec | 10659 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, |
5f5c8ee5 GM |
10660 | 0, 0, "", "") |
10661 | () | |
10662 | { | |
886bd6f2 GM |
10663 | struct frame *sf = SELECTED_FRAME (); |
10664 | struct glyph_matrix *m = (XWINDOW (sf->tool_bar_window) | |
5f5c8ee5 GM |
10665 | ->current_matrix); |
10666 | dump_glyph_row (m, 0, 1); | |
10667 | return Qnil; | |
10668 | } | |
ca26e1c8 | 10669 | |
0f9c0ff0 | 10670 | |
5f5c8ee5 GM |
10671 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
10672 | Strace_redisplay_toggle, 0, 0, "", | |
10673 | "Toggle tracing of redisplay.") | |
10674 | () | |
10675 | { | |
10676 | trace_redisplay_p = !trace_redisplay_p; | |
10677 | return Qnil; | |
10678 | } | |
bf9249e3 GM |
10679 | |
10680 | ||
10681 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, 1, "", | |
10682 | "Print STRING to stderr.") | |
10683 | (string) | |
10684 | Lisp_Object string; | |
10685 | { | |
10686 | CHECK_STRING (string, 0); | |
10687 | fprintf (stderr, "%s", XSTRING (string)->data); | |
10688 | return Qnil; | |
10689 | } | |
5f5c8ee5 GM |
10690 | |
10691 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 10692 | |
ca26e1c8 | 10693 | |
5f5c8ee5 GM |
10694 | \f |
10695 | /*********************************************************************** | |
10696 | Building Desired Matrix Rows | |
10697 | ***********************************************************************/ | |
a2889657 | 10698 | |
5f5c8ee5 GM |
10699 | /* Return a temporary glyph row holding the glyphs of an overlay |
10700 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 10701 | |
5f5c8ee5 GM |
10702 | static struct glyph_row * |
10703 | get_overlay_arrow_glyph_row (w) | |
10704 | struct window *w; | |
10705 | { | |
10706 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
10707 | struct buffer *buffer = XBUFFER (w->buffer); | |
10708 | struct buffer *old = current_buffer; | |
10709 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
10710 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
10711 | unsigned char *arrow_end = arrow_string + arrow_len; | |
10712 | unsigned char *p; | |
10713 | struct it it; | |
10714 | int multibyte_p; | |
10715 | int n_glyphs_before; | |
10716 | ||
10717 | set_buffer_temp (buffer); | |
10718 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
10719 | it.glyph_row->used[TEXT_AREA] = 0; | |
10720 | SET_TEXT_POS (it.position, 0, 0); | |
10721 | ||
10722 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
10723 | p = arrow_string; | |
10724 | while (p < arrow_end) | |
10725 | { | |
10726 | Lisp_Object face, ilisp; | |
10727 | ||
10728 | /* Get the next character. */ | |
10729 | if (multibyte_p) | |
4fdb80f2 | 10730 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
10731 | else |
10732 | it.c = *p, it.len = 1; | |
10733 | p += it.len; | |
10734 | ||
10735 | /* Get its face. */ | |
10736 | XSETFASTINT (ilisp, p - arrow_string); | |
10737 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
10738 | it.face_id = compute_char_face (f, it.c, face); | |
10739 | ||
10740 | /* Compute its width, get its glyphs. */ | |
10741 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 10742 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
10743 | PRODUCE_GLYPHS (&it); |
10744 | ||
10745 | /* If this character doesn't fit any more in the line, we have | |
10746 | to remove some glyphs. */ | |
10747 | if (it.current_x > it.last_visible_x) | |
10748 | { | |
10749 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
10750 | break; | |
10751 | } | |
10752 | } | |
10753 | ||
10754 | set_buffer_temp (old); | |
10755 | return it.glyph_row; | |
10756 | } | |
ca26e1c8 | 10757 | |
b0a0fbda | 10758 | |
5f5c8ee5 GM |
10759 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
10760 | glyphs are only inserted for terminal frames since we can't really | |
10761 | win with truncation glyphs when partially visible glyphs are | |
10762 | involved. Which glyphs to insert is determined by | |
10763 | produce_special_glyphs. */ | |
67481ae5 | 10764 | |
5f5c8ee5 GM |
10765 | static void |
10766 | insert_left_trunc_glyphs (it) | |
10767 | struct it *it; | |
10768 | { | |
10769 | struct it truncate_it; | |
10770 | struct glyph *from, *end, *to, *toend; | |
10771 | ||
10772 | xassert (!FRAME_WINDOW_P (it->f)); | |
10773 | ||
10774 | /* Get the truncation glyphs. */ | |
10775 | truncate_it = *it; | |
5f5c8ee5 GM |
10776 | truncate_it.current_x = 0; |
10777 | truncate_it.face_id = DEFAULT_FACE_ID; | |
10778 | truncate_it.glyph_row = &scratch_glyph_row; | |
10779 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
10780 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
10781 | truncate_it.object = 0; | |
10782 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); | |
10783 | ||
10784 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
10785 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
10786 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
10787 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
10788 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
10789 | ||
10790 | while (from < end) | |
10791 | *to++ = *from++; | |
10792 | ||
10793 | /* There may be padding glyphs left over. Remove them. */ | |
10794 | from = to; | |
10795 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
10796 | ++from; | |
10797 | while (from < toend) | |
10798 | *to++ = *from++; | |
10799 | ||
10800 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
10801 | } | |
e0bfbde6 | 10802 | |
e0bfbde6 | 10803 | |
5f5c8ee5 | 10804 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 10805 | |
5f5c8ee5 GM |
10806 | Most of the time, ascent and height of a display line will be equal |
10807 | to the max_ascent and max_height values of the display iterator | |
10808 | structure. This is not the case if | |
67481ae5 | 10809 | |
5f5c8ee5 GM |
10810 | 1. We hit ZV without displaying anything. In this case, max_ascent |
10811 | and max_height will be zero. | |
1c9241f5 | 10812 | |
5f5c8ee5 GM |
10813 | 2. We have some glyphs that don't contribute to the line height. |
10814 | (The glyph row flag contributes_to_line_height_p is for future | |
10815 | pixmap extensions). | |
f6fd109b | 10816 | |
5f5c8ee5 GM |
10817 | The first case is easily covered by using default values because in |
10818 | these cases, the line height does not really matter, except that it | |
10819 | must not be zero. */ | |
67481ae5 | 10820 | |
5f5c8ee5 GM |
10821 | static void |
10822 | compute_line_metrics (it) | |
10823 | struct it *it; | |
10824 | { | |
10825 | struct glyph_row *row = it->glyph_row; | |
10826 | int area, i; | |
1c2250c2 | 10827 | |
5f5c8ee5 GM |
10828 | if (FRAME_WINDOW_P (it->f)) |
10829 | { | |
045dee35 | 10830 | int i, header_line_height; |
1c2250c2 | 10831 | |
5f5c8ee5 GM |
10832 | /* The line may consist of one space only, that was added to |
10833 | place the cursor on it. If so, the row's height hasn't been | |
10834 | computed yet. */ | |
10835 | if (row->height == 0) | |
10836 | { | |
10837 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 10838 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
10839 | row->ascent = it->max_ascent; |
10840 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10841 | row->phys_ascent = it->max_phys_ascent; |
10842 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10843 | } |
10844 | ||
10845 | /* Compute the width of this line. */ | |
10846 | row->pixel_width = row->x; | |
10847 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
10848 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
10849 | ||
10850 | xassert (row->pixel_width >= 0); | |
10851 | xassert (row->ascent >= 0 && row->height > 0); | |
10852 | ||
312246d1 GM |
10853 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
10854 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
10855 | ||
10856 | /* If first line's physical ascent is larger than its logical | |
10857 | ascent, use the physical ascent, and make the row taller. | |
10858 | This makes accented characters fully visible. */ | |
10859 | if (row == it->w->desired_matrix->rows | |
10860 | && row->phys_ascent > row->ascent) | |
10861 | { | |
10862 | row->height += row->phys_ascent - row->ascent; | |
10863 | row->ascent = row->phys_ascent; | |
10864 | } | |
10865 | ||
5f5c8ee5 GM |
10866 | /* Compute how much of the line is visible. */ |
10867 | row->visible_height = row->height; | |
10868 | ||
045dee35 GM |
10869 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
10870 | if (row->y < header_line_height) | |
10871 | row->visible_height -= header_line_height - row->y; | |
5f5c8ee5 GM |
10872 | else |
10873 | { | |
10874 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
10875 | if (row->y + row->height > max_y) | |
10876 | row->visible_height -= row->y + row->height - max_y; | |
10877 | } | |
10878 | } | |
10879 | else | |
10880 | { | |
10881 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
10882 | row->ascent = row->phys_ascent = 0; |
10883 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 10884 | } |
67481ae5 | 10885 | |
5f5c8ee5 GM |
10886 | /* Compute a hash code for this row. */ |
10887 | row->hash = 0; | |
10888 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
10889 | for (i = 0; i < row->used[area]; ++i) | |
10890 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
10891 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
10892 | + row->glyphs[area][i].face_id |
10893 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 10894 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 10895 | |
5f5c8ee5 | 10896 | it->max_ascent = it->max_descent = 0; |
312246d1 | 10897 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 10898 | } |
12adba34 | 10899 | |
ca26e1c8 | 10900 | |
5f5c8ee5 GM |
10901 | /* Append one space to the glyph row of iterator IT if doing a |
10902 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
10903 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 10904 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
10905 | |
10906 | This function is called to make sure that there is always one glyph | |
10907 | at the end of a glyph row that the cursor can be set on under | |
10908 | window-systems. (If there weren't such a glyph we would not know | |
10909 | how wide and tall a box cursor should be displayed). | |
10910 | ||
10911 | At the same time this space let's a nicely handle clearing to the | |
10912 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 10913 | |
80c6cb1f | 10914 | static int |
5f5c8ee5 GM |
10915 | append_space (it, default_face_p) |
10916 | struct it *it; | |
10917 | int default_face_p; | |
10918 | { | |
10919 | if (FRAME_WINDOW_P (it->f)) | |
10920 | { | |
10921 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 10922 | |
5f5c8ee5 GM |
10923 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
10924 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 10925 | { |
5f5c8ee5 GM |
10926 | /* Save some values that must not be changed. */ |
10927 | int saved_x = it->current_x; | |
10928 | struct text_pos saved_pos; | |
10929 | int saved_what = it->what; | |
10930 | int saved_face_id = it->face_id; | |
5f5c8ee5 | 10931 | Lisp_Object saved_object; |
980806b6 | 10932 | struct face *face; |
5f5c8ee5 GM |
10933 | |
10934 | saved_object = it->object; | |
10935 | saved_pos = it->position; | |
10936 | ||
10937 | it->what = IT_CHARACTER; | |
10938 | bzero (&it->position, sizeof it->position); | |
10939 | it->object = 0; | |
10940 | it->c = ' '; | |
10941 | it->len = 1; | |
5f5c8ee5 GM |
10942 | |
10943 | if (default_face_p) | |
10944 | it->face_id = DEFAULT_FACE_ID; | |
980806b6 KH |
10945 | face = FACE_FROM_ID (it->f, it->face_id); |
10946 | it->face_id = FACE_FOR_CHAR (it->f, face, 0); | |
1842fc1a | 10947 | |
5f5c8ee5 GM |
10948 | PRODUCE_GLYPHS (it); |
10949 | ||
10950 | it->current_x = saved_x; | |
10951 | it->object = saved_object; | |
10952 | it->position = saved_pos; | |
10953 | it->what = saved_what; | |
10954 | it->face_id = saved_face_id; | |
80c6cb1f | 10955 | return 1; |
5f5c8ee5 GM |
10956 | } |
10957 | } | |
80c6cb1f GM |
10958 | |
10959 | return 0; | |
5f5c8ee5 | 10960 | } |
12adba34 | 10961 | |
1842fc1a | 10962 | |
5f5c8ee5 GM |
10963 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
10964 | to the end of the display line. Called from display_line. | |
10965 | If the glyph row is empty, add a space glyph to it so that we | |
10966 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
10967 | ||
10968 | static void | |
10969 | extend_face_to_end_of_line (it) | |
10970 | struct it *it; | |
10971 | { | |
10972 | struct face *face; | |
10973 | struct frame *f = it->f; | |
1842fc1a | 10974 | |
5f5c8ee5 GM |
10975 | /* If line is already filled, do nothing. */ |
10976 | if (it->current_x >= it->last_visible_x) | |
10977 | return; | |
10978 | ||
10979 | /* Face extension extends the background and box of IT->face_id | |
10980 | to the end of the line. If the background equals the background | |
10981 | of the frame, we haven't to do anything. */ | |
10982 | face = FACE_FROM_ID (f, it->face_id); | |
10983 | if (FRAME_WINDOW_P (f) | |
10984 | && face->box == FACE_NO_BOX | |
10985 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
10986 | && !face->stipple) | |
10987 | return; | |
1842fc1a | 10988 | |
5f5c8ee5 GM |
10989 | /* Set the glyph row flag indicating that the face of the last glyph |
10990 | in the text area has to be drawn to the end of the text area. */ | |
10991 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 10992 | |
980806b6 KH |
10993 | /* If current character of IT is not ASCII, make sure we have the |
10994 | ASCII face. This will be automatically undone the next time | |
10995 | get_next_display_element returns a multibyte character. Note | |
10996 | that the character will always be single byte in unibyte text. */ | |
10997 | if (!SINGLE_BYTE_CHAR_P (it->c)) | |
5f5c8ee5 | 10998 | { |
980806b6 | 10999 | it->face_id = FACE_FOR_CHAR (f, face, 0); |
5f5c8ee5 | 11000 | } |
545e04f6 | 11001 | |
5f5c8ee5 GM |
11002 | if (FRAME_WINDOW_P (f)) |
11003 | { | |
11004 | /* If the row is empty, add a space with the current face of IT, | |
11005 | so that we know which face to draw. */ | |
11006 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 11007 | { |
5f5c8ee5 | 11008 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 11009 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 11010 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 11011 | } |
5f5c8ee5 GM |
11012 | } |
11013 | else | |
11014 | { | |
11015 | /* Save some values that must not be changed. */ | |
11016 | int saved_x = it->current_x; | |
11017 | struct text_pos saved_pos; | |
11018 | Lisp_Object saved_object; | |
11019 | int saved_what = it->what; | |
11020 | ||
11021 | saved_object = it->object; | |
11022 | saved_pos = it->position; | |
11023 | ||
11024 | it->what = IT_CHARACTER; | |
11025 | bzero (&it->position, sizeof it->position); | |
11026 | it->object = 0; | |
11027 | it->c = ' '; | |
11028 | it->len = 1; | |
11029 | ||
11030 | PRODUCE_GLYPHS (it); | |
11031 | ||
11032 | while (it->current_x <= it->last_visible_x) | |
11033 | PRODUCE_GLYPHS (it); | |
11034 | ||
11035 | /* Don't count these blanks really. It would let us insert a left | |
11036 | truncation glyph below and make us set the cursor on them, maybe. */ | |
11037 | it->current_x = saved_x; | |
11038 | it->object = saved_object; | |
11039 | it->position = saved_pos; | |
11040 | it->what = saved_what; | |
11041 | } | |
11042 | } | |
12adba34 | 11043 | |
545e04f6 | 11044 | |
5f5c8ee5 GM |
11045 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
11046 | trailing whitespace. */ | |
1c9241f5 | 11047 | |
5f5c8ee5 GM |
11048 | static int |
11049 | trailing_whitespace_p (charpos) | |
11050 | int charpos; | |
11051 | { | |
11052 | int bytepos = CHAR_TO_BYTE (charpos); | |
11053 | int c = 0; | |
7bbe686f | 11054 | |
5f5c8ee5 GM |
11055 | while (bytepos < ZV_BYTE |
11056 | && (c = FETCH_CHAR (bytepos), | |
11057 | c == ' ' || c == '\t')) | |
11058 | ++bytepos; | |
0d09d1e6 | 11059 | |
8f897821 GM |
11060 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
11061 | { | |
11062 | if (bytepos != PT_BYTE) | |
11063 | return 1; | |
11064 | } | |
11065 | return 0; | |
5f5c8ee5 | 11066 | } |
31b24551 | 11067 | |
545e04f6 | 11068 | |
5f5c8ee5 | 11069 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 11070 | |
5f5c8ee5 GM |
11071 | void |
11072 | highlight_trailing_whitespace (f, row) | |
11073 | struct frame *f; | |
11074 | struct glyph_row *row; | |
11075 | { | |
11076 | int used = row->used[TEXT_AREA]; | |
11077 | ||
11078 | if (used) | |
11079 | { | |
11080 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
11081 | struct glyph *glyph = start + used - 1; | |
11082 | ||
11083 | /* Skip over the space glyph inserted to display the | |
11084 | cursor at the end of a line. */ | |
11085 | if (glyph->type == CHAR_GLYPH | |
43d120d8 | 11086 | && glyph->u.ch == ' ' |
5f5c8ee5 GM |
11087 | && glyph->object == 0) |
11088 | --glyph; | |
11089 | ||
11090 | /* If last glyph is a space or stretch, and it's trailing | |
11091 | whitespace, set the face of all trailing whitespace glyphs in | |
11092 | IT->glyph_row to `trailing-whitespace'. */ | |
11093 | if (glyph >= start | |
11094 | && BUFFERP (glyph->object) | |
11095 | && (glyph->type == STRETCH_GLYPH | |
11096 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 11097 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 11098 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 11099 | { |
980806b6 | 11100 | int face_id = lookup_named_face (f, Qtrailing_whitespace, 0); |
5f5c8ee5 GM |
11101 | |
11102 | while (glyph >= start | |
11103 | && BUFFERP (glyph->object) | |
11104 | && (glyph->type == STRETCH_GLYPH | |
11105 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
11106 | && glyph->u.ch == ' '))) |
11107 | (glyph--)->face_id = face_id; | |
545e04f6 | 11108 | } |
a2889657 | 11109 | } |
5f5c8ee5 | 11110 | } |
a2889657 | 11111 | |
5fcbb24d | 11112 | |
5f5c8ee5 GM |
11113 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
11114 | IT->w from text at the current position of IT. See dispextern.h | |
11115 | for an overview of struct it. Value is non-zero if | |
11116 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
11117 | only. */ | |
11118 | ||
11119 | static int | |
11120 | display_line (it) | |
11121 | struct it *it; | |
11122 | { | |
11123 | struct glyph_row *row = it->glyph_row; | |
11124 | ||
11125 | /* We always start displaying at hpos zero even if hscrolled. */ | |
11126 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 11127 | |
5f5c8ee5 GM |
11128 | /* We must not display in a row that's not a text row. */ |
11129 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
11130 | < it->w->desired_matrix->nrows); | |
12adba34 | 11131 | |
5f5c8ee5 GM |
11132 | /* Is IT->w showing the region? */ |
11133 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 11134 | |
5f5c8ee5 GM |
11135 | /* Clear the result glyph row and enable it. */ |
11136 | prepare_desired_row (row); | |
12adba34 | 11137 | |
5f5c8ee5 GM |
11138 | row->y = it->current_y; |
11139 | row->start = it->current; | |
11140 | row->continuation_lines_width = it->continuation_lines_width; | |
11141 | row->displays_text_p = 1; | |
11142 | ||
11143 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
11144 | display_line on only one line at a time, in which case this | |
11145 | can't really hurt too much, or we call it on lines which appear | |
11146 | one after another in the buffer, in which case all calls to | |
11147 | recenter_overlay_lists but the first will be pretty cheap. */ | |
11148 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
11149 | ||
5f5c8ee5 GM |
11150 | /* Move over display elements that are not visible because we are |
11151 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
11152 | if the first glyph is partially visible or if we hit a line end. */ | |
11153 | if (it->current_x < it->first_visible_x) | |
11154 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
11155 | MOVE_TO_POS | MOVE_TO_X); | |
11156 | ||
11157 | /* Get the initial row height. This is either the height of the | |
11158 | text hscrolled, if there is any, or zero. */ | |
11159 | row->ascent = it->max_ascent; | |
11160 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
11161 | row->phys_ascent = it->max_phys_ascent; |
11162 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
11163 | |
11164 | /* Loop generating characters. The loop is left with IT on the next | |
11165 | character to display. */ | |
11166 | while (1) | |
11167 | { | |
11168 | int n_glyphs_before, hpos_before, x_before; | |
11169 | int x, i, nglyphs; | |
11170 | ||
11171 | /* Retrieve the next thing to display. Value is zero if end of | |
11172 | buffer reached. */ | |
11173 | if (!get_next_display_element (it)) | |
11174 | { | |
11175 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
11176 | display the cursor there under X. Set the charpos of the |
11177 | first glyph of blank lines not corresponding to any text | |
11178 | to -1. */ | |
11179 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
11180 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 11181 | { |
5f5c8ee5 GM |
11182 | row->glyphs[TEXT_AREA]->charpos = -1; |
11183 | row->displays_text_p = 0; | |
11184 | ||
11185 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
11186 | row->indicate_empty_line_p = 1; | |
a2889657 | 11187 | } |
5f5c8ee5 GM |
11188 | |
11189 | it->continuation_lines_width = 0; | |
11190 | row->ends_at_zv_p = 1; | |
11191 | break; | |
a2889657 | 11192 | } |
a2889657 | 11193 | |
5f5c8ee5 GM |
11194 | /* Now, get the metrics of what we want to display. This also |
11195 | generates glyphs in `row' (which is IT->glyph_row). */ | |
11196 | n_glyphs_before = row->used[TEXT_AREA]; | |
11197 | x = it->current_x; | |
11198 | PRODUCE_GLYPHS (it); | |
a2889657 | 11199 | |
5f5c8ee5 GM |
11200 | /* If this display element was in marginal areas, continue with |
11201 | the next one. */ | |
11202 | if (it->area != TEXT_AREA) | |
a2889657 | 11203 | { |
5f5c8ee5 GM |
11204 | row->ascent = max (row->ascent, it->max_ascent); |
11205 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11206 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11207 | row->phys_height = max (row->phys_height, | |
11208 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11209 | set_iterator_to_next (it); |
11210 | continue; | |
11211 | } | |
5936754e | 11212 | |
5f5c8ee5 GM |
11213 | /* Does the display element fit on the line? If we truncate |
11214 | lines, we should draw past the right edge of the window. If | |
11215 | we don't truncate, we want to stop so that we can display the | |
11216 | continuation glyph before the right margin. If lines are | |
11217 | continued, there are two possible strategies for characters | |
11218 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
11219 | glyphs as possible in this line and leave the rest for the | |
11220 | continuation line, or display the whole element in the next | |
11221 | line. Original redisplay did the former, so we do it also. */ | |
11222 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
11223 | hpos_before = it->hpos; | |
11224 | x_before = x; | |
11225 | ||
11226 | if (nglyphs == 1 | |
11227 | && it->current_x < it->last_visible_x) | |
11228 | { | |
11229 | ++it->hpos; | |
11230 | row->ascent = max (row->ascent, it->max_ascent); | |
11231 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11232 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11233 | row->phys_height = max (row->phys_height, | |
11234 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11235 | if (it->current_x - it->pixel_width < it->first_visible_x) |
11236 | row->x = x - it->first_visible_x; | |
11237 | } | |
11238 | else | |
11239 | { | |
11240 | int new_x; | |
11241 | struct glyph *glyph; | |
11242 | ||
11243 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 11244 | { |
5f5c8ee5 GM |
11245 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
11246 | new_x = x + glyph->pixel_width; | |
11247 | ||
11248 | if (/* Lines are continued. */ | |
11249 | !it->truncate_lines_p | |
11250 | && (/* Glyph doesn't fit on the line. */ | |
11251 | new_x > it->last_visible_x | |
11252 | /* Or it fits exactly on a window system frame. */ | |
11253 | || (new_x == it->last_visible_x | |
11254 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 11255 | { |
5f5c8ee5 GM |
11256 | /* End of a continued line. */ |
11257 | ||
11258 | if (it->hpos == 0 | |
11259 | || (new_x == it->last_visible_x | |
11260 | && FRAME_WINDOW_P (it->f))) | |
11261 | { | |
11262 | /* Current glyph fits exactly on the line. We | |
11263 | must continue the line because we can't draw | |
11264 | the cursor after the glyph. */ | |
11265 | row->continued_p = 1; | |
11266 | it->current_x = new_x; | |
11267 | it->continuation_lines_width += new_x; | |
11268 | ++it->hpos; | |
11269 | if (i == nglyphs - 1) | |
11270 | set_iterator_to_next (it); | |
11271 | } | |
11272 | else | |
5936754e | 11273 | { |
5f5c8ee5 GM |
11274 | /* Display element draws past the right edge of |
11275 | the window. Restore positions to values | |
11276 | before the element. The next line starts | |
11277 | with current_x before the glyph that could | |
11278 | not be displayed, so that TAB works right. */ | |
11279 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
11280 | ||
11281 | /* Display continuation glyphs. */ | |
11282 | if (!FRAME_WINDOW_P (it->f)) | |
11283 | produce_special_glyphs (it, IT_CONTINUATION); | |
11284 | row->continued_p = 1; | |
11285 | ||
11286 | it->current_x = x; | |
11287 | it->continuation_lines_width += x; | |
5936754e | 11288 | } |
5f5c8ee5 GM |
11289 | break; |
11290 | } | |
11291 | else if (new_x > it->first_visible_x) | |
11292 | { | |
11293 | /* Increment number of glyphs actually displayed. */ | |
11294 | ++it->hpos; | |
11295 | ||
11296 | if (x < it->first_visible_x) | |
11297 | /* Glyph is partially visible, i.e. row starts at | |
11298 | negative X position. */ | |
11299 | row->x = x - it->first_visible_x; | |
11300 | } | |
11301 | else | |
11302 | { | |
11303 | /* Glyph is completely off the left margin of the | |
11304 | window. This should not happen because of the | |
11305 | move_it_in_display_line at the start of | |
11306 | this function. */ | |
11307 | abort (); | |
a2889657 | 11308 | } |
a2889657 | 11309 | } |
5f5c8ee5 GM |
11310 | |
11311 | row->ascent = max (row->ascent, it->max_ascent); | |
11312 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11313 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11314 | row->phys_height = max (row->phys_height, | |
11315 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11316 | |
11317 | /* End of this display line if row is continued. */ | |
11318 | if (row->continued_p) | |
11319 | break; | |
a2889657 | 11320 | } |
a2889657 | 11321 | |
5f5c8ee5 GM |
11322 | /* Is this a line end? If yes, we're also done, after making |
11323 | sure that a non-default face is extended up to the right | |
11324 | margin of the window. */ | |
11325 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 11326 | { |
5f5c8ee5 GM |
11327 | int used_before = row->used[TEXT_AREA]; |
11328 | ||
11329 | /* Add a space at the end of the line that is used to | |
11330 | display the cursor there. */ | |
11331 | append_space (it, 0); | |
11332 | ||
11333 | /* Extend the face to the end of the line. */ | |
11334 | extend_face_to_end_of_line (it); | |
11335 | ||
11336 | /* Make sure we have the position. */ | |
11337 | if (used_before == 0) | |
11338 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
11339 | ||
11340 | /* Consume the line end. This skips over invisible lines. */ | |
11341 | set_iterator_to_next (it); | |
11342 | it->continuation_lines_width = 0; | |
11343 | break; | |
1c9241f5 | 11344 | } |
a2889657 | 11345 | |
5f5c8ee5 GM |
11346 | /* Proceed with next display element. Note that this skips |
11347 | over lines invisible because of selective display. */ | |
11348 | set_iterator_to_next (it); | |
b1d1124b | 11349 | |
5f5c8ee5 GM |
11350 | /* If we truncate lines, we are done when the last displayed |
11351 | glyphs reach past the right margin of the window. */ | |
11352 | if (it->truncate_lines_p | |
11353 | && (FRAME_WINDOW_P (it->f) | |
11354 | ? (it->current_x >= it->last_visible_x) | |
11355 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 11356 | { |
5f5c8ee5 GM |
11357 | /* Maybe add truncation glyphs. */ |
11358 | if (!FRAME_WINDOW_P (it->f)) | |
11359 | { | |
11360 | --it->glyph_row->used[TEXT_AREA]; | |
11361 | produce_special_glyphs (it, IT_TRUNCATION); | |
11362 | } | |
11363 | ||
11364 | row->truncated_on_right_p = 1; | |
11365 | it->continuation_lines_width = 0; | |
312246d1 | 11366 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
11367 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
11368 | it->hpos = hpos_before; | |
11369 | it->current_x = x_before; | |
11370 | break; | |
75d13c64 | 11371 | } |
a2889657 | 11372 | } |
a2889657 | 11373 | |
5f5c8ee5 GM |
11374 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
11375 | at the left window margin. */ | |
11376 | if (it->first_visible_x | |
11377 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
11378 | { | |
11379 | if (!FRAME_WINDOW_P (it->f)) | |
11380 | insert_left_trunc_glyphs (it); | |
11381 | row->truncated_on_left_p = 1; | |
11382 | } | |
a2889657 | 11383 | |
5f5c8ee5 GM |
11384 | /* If the start of this line is the overlay arrow-position, then |
11385 | mark this glyph row as the one containing the overlay arrow. | |
11386 | This is clearly a mess with variable size fonts. It would be | |
11387 | better to let it be displayed like cursors under X. */ | |
e24c997d | 11388 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 11389 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
11390 | && (MATRIX_ROW_START_CHARPOS (row) |
11391 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 11392 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
11393 | && ! overlay_arrow_seen) |
11394 | { | |
5f5c8ee5 GM |
11395 | /* Overlay arrow in window redisplay is a bitmap. */ |
11396 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 11397 | { |
5f5c8ee5 GM |
11398 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
11399 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
11400 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
11401 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
11402 | struct glyph *p2, *end; | |
11403 | ||
11404 | /* Copy the arrow glyphs. */ | |
11405 | while (glyph < arrow_end) | |
11406 | *p++ = *glyph++; | |
11407 | ||
11408 | /* Throw away padding glyphs. */ | |
11409 | p2 = p; | |
11410 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
11411 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
11412 | ++p2; | |
11413 | if (p2 > p) | |
212e4f87 | 11414 | { |
5f5c8ee5 GM |
11415 | while (p2 < end) |
11416 | *p++ = *p2++; | |
11417 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 11418 | } |
c4628384 | 11419 | } |
5f5c8ee5 | 11420 | |
a2889657 | 11421 | overlay_arrow_seen = 1; |
5f5c8ee5 | 11422 | row->overlay_arrow_p = 1; |
a2889657 JB |
11423 | } |
11424 | ||
5f5c8ee5 GM |
11425 | /* Compute pixel dimensions of this line. */ |
11426 | compute_line_metrics (it); | |
11427 | ||
11428 | /* Remember the position at which this line ends. */ | |
11429 | row->end = it->current; | |
11430 | ||
11431 | /* Maybe set the cursor. If you change this, it's probably a good | |
11432 | idea to also change the code in redisplay_window for cursor | |
11433 | movement in an unchanged window. */ | |
11434 | if (it->w->cursor.vpos < 0 | |
11435 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
11436 | && MATRIX_ROW_END_CHARPOS (row) >= PT | |
11437 | && !(MATRIX_ROW_END_CHARPOS (row) == PT | |
11438 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
11439 | || !row->ends_at_zv_p))) | |
11440 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
11441 | ||
11442 | /* Highlight trailing whitespace. */ | |
8f897821 | 11443 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
11444 | highlight_trailing_whitespace (it->f, it->glyph_row); |
11445 | ||
11446 | /* Prepare for the next line. This line starts horizontally at (X | |
11447 | HPOS) = (0 0). Vertical positions are incremented. As a | |
11448 | convenience for the caller, IT->glyph_row is set to the next | |
11449 | row to be used. */ | |
11450 | it->current_x = it->hpos = 0; | |
11451 | it->current_y += row->height; | |
11452 | ++it->vpos; | |
11453 | ++it->glyph_row; | |
11454 | return row->displays_text_p; | |
a2889657 | 11455 | } |
5f5c8ee5 GM |
11456 | |
11457 | ||
a2889657 | 11458 | \f |
5f5c8ee5 GM |
11459 | /*********************************************************************** |
11460 | Menu Bar | |
11461 | ***********************************************************************/ | |
11462 | ||
11463 | /* Redisplay the menu bar in the frame for window W. | |
11464 | ||
11465 | The menu bar of X frames that don't have X toolkit support is | |
11466 | displayed in a special window W->frame->menu_bar_window. | |
11467 | ||
11468 | The menu bar of terminal frames is treated specially as far as | |
11469 | glyph matrices are concerned. Menu bar lines are not part of | |
11470 | windows, so the update is done directly on the frame matrix rows | |
11471 | for the menu bar. */ | |
7ce2c095 RS |
11472 | |
11473 | static void | |
11474 | display_menu_bar (w) | |
11475 | struct window *w; | |
11476 | { | |
5f5c8ee5 GM |
11477 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11478 | struct it it; | |
11479 | Lisp_Object items; | |
8351baf2 | 11480 | int i; |
7ce2c095 | 11481 | |
5f5c8ee5 | 11482 | /* Don't do all this for graphical frames. */ |
dc937613 | 11483 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
11484 | if (!NILP (Vwindow_system)) |
11485 | return; | |
dc937613 | 11486 | #endif |
dc937613 | 11487 | #ifdef USE_X_TOOLKIT |
d3413a53 | 11488 | if (FRAME_X_P (f)) |
7ce2c095 | 11489 | return; |
5f5c8ee5 GM |
11490 | #endif |
11491 | ||
11492 | #ifdef USE_X_TOOLKIT | |
11493 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 11494 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
11495 | it.first_visible_x = 0; |
11496 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11497 | #else /* not USE_X_TOOLKIT */ | |
11498 | if (FRAME_WINDOW_P (f)) | |
11499 | { | |
11500 | /* Menu bar lines are displayed in the desired matrix of the | |
11501 | dummy window menu_bar_window. */ | |
11502 | struct window *menu_w; | |
11503 | xassert (WINDOWP (f->menu_bar_window)); | |
11504 | menu_w = XWINDOW (f->menu_bar_window); | |
11505 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 11506 | MENU_FACE_ID); |
5f5c8ee5 GM |
11507 | it.first_visible_x = 0; |
11508 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11509 | } | |
11510 | else | |
11511 | { | |
11512 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
11513 | pixel x/y. */ | |
11514 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 11515 | MENU_FACE_ID); |
5f5c8ee5 GM |
11516 | it.first_visible_x = 0; |
11517 | it.last_visible_x = FRAME_WIDTH (f); | |
11518 | } | |
11519 | #endif /* not USE_X_TOOLKIT */ | |
11520 | ||
11521 | /* Clear all rows of the menu bar. */ | |
11522 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
11523 | { | |
11524 | struct glyph_row *row = it.glyph_row + i; | |
11525 | clear_glyph_row (row); | |
11526 | row->enabled_p = 1; | |
11527 | row->full_width_p = 1; | |
11528 | } | |
7ce2c095 | 11529 | |
5f5c8ee5 GM |
11530 | /* Make the first line of the menu bar appear in reverse video. */ |
11531 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 11532 | |
5f5c8ee5 GM |
11533 | /* Display all items of the menu bar. */ |
11534 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 11535 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 11536 | { |
5f5c8ee5 GM |
11537 | Lisp_Object string; |
11538 | ||
11539 | /* Stop at nil string. */ | |
8351baf2 RS |
11540 | string = XVECTOR (items)->contents[i + 1]; |
11541 | if (NILP (string)) | |
11542 | break; | |
2d66ad19 | 11543 | |
5f5c8ee5 GM |
11544 | /* Remember where item was displayed. */ |
11545 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 11546 | |
5f5c8ee5 GM |
11547 | /* Display the item, pad with one space. */ |
11548 | if (it.current_x < it.last_visible_x) | |
11549 | display_string (NULL, string, Qnil, 0, 0, &it, | |
11550 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
11551 | } |
11552 | ||
2d66ad19 | 11553 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
11554 | if (it.current_x < it.last_visible_x) |
11555 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 11556 | |
5f5c8ee5 GM |
11557 | /* Compute the total height of the lines. */ |
11558 | compute_line_metrics (&it); | |
7ce2c095 | 11559 | } |
5f5c8ee5 GM |
11560 | |
11561 | ||
7ce2c095 | 11562 | \f |
5f5c8ee5 GM |
11563 | /*********************************************************************** |
11564 | Mode Line | |
11565 | ***********************************************************************/ | |
11566 | ||
11567 | /* Display the mode and/or top line of window W. */ | |
a2889657 JB |
11568 | |
11569 | static void | |
5f5c8ee5 | 11570 | display_mode_lines (w) |
a2889657 JB |
11571 | struct window *w; |
11572 | { | |
5f5c8ee5 | 11573 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 11574 | line_number_displayed = 0; |
155ef550 | 11575 | w->column_number_displayed = Qnil; |
aa6d10fa | 11576 | |
5f5c8ee5 | 11577 | if (WINDOW_WANTS_MODELINE_P (w)) |
045dee35 GM |
11578 | display_mode_line (w, MODE_LINE_FACE_ID, |
11579 | current_buffer->mode_line_format); | |
5f5c8ee5 | 11580 | |
045dee35 GM |
11581 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
11582 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
11583 | current_buffer->header_line_format); | |
5f5c8ee5 | 11584 | } |
03b294dc | 11585 | |
03b294dc | 11586 | |
5f5c8ee5 | 11587 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 11588 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
5f5c8ee5 | 11589 | FORMAT is the mode line format to display. */ |
03b294dc | 11590 | |
5f5c8ee5 GM |
11591 | static void |
11592 | display_mode_line (w, face_id, format) | |
11593 | struct window *w; | |
11594 | enum face_id face_id; | |
11595 | Lisp_Object format; | |
11596 | { | |
11597 | struct it it; | |
11598 | struct face *face; | |
03b294dc | 11599 | |
5f5c8ee5 GM |
11600 | init_iterator (&it, w, -1, -1, NULL, face_id); |
11601 | prepare_desired_row (it.glyph_row); | |
11602 | ||
11603 | /* Temporarily make frame's keyboard the current kboard so that | |
11604 | kboard-local variables in the mode_line_format will get the right | |
11605 | values. */ | |
11606 | push_frame_kboard (it.f); | |
11607 | display_mode_element (&it, 0, 0, 0, format); | |
11608 | pop_frame_kboard (); | |
a2889657 | 11609 | |
5f5c8ee5 GM |
11610 | /* Fill up with spaces. */ |
11611 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
11612 | ||
11613 | compute_line_metrics (&it); | |
11614 | it.glyph_row->full_width_p = 1; | |
11615 | it.glyph_row->mode_line_p = 1; | |
11616 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
11617 | it.glyph_row->continued_p = 0; | |
11618 | it.glyph_row->truncated_on_left_p = 0; | |
11619 | it.glyph_row->truncated_on_right_p = 0; | |
11620 | ||
11621 | /* Make a 3D mode-line have a shadow at its right end. */ | |
11622 | face = FACE_FROM_ID (it.f, face_id); | |
11623 | extend_face_to_end_of_line (&it); | |
11624 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 11625 | { |
5f5c8ee5 GM |
11626 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
11627 | + it.glyph_row->used[TEXT_AREA] - 1); | |
11628 | last->right_box_line_p = 1; | |
d7eb09a0 | 11629 | } |
a2889657 JB |
11630 | } |
11631 | ||
a2889657 | 11632 | |
5f5c8ee5 GM |
11633 | /* Contribute ELT to the mode line for window IT->w. How it |
11634 | translates into text depends on its data type. | |
a2889657 | 11635 | |
5f5c8ee5 | 11636 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
11637 | |
11638 | DEPTH is the depth in recursion. It is used to prevent | |
11639 | infinite recursion here. | |
11640 | ||
5f5c8ee5 GM |
11641 | FIELD_WIDTH is the number of characters the display of ELT should |
11642 | occupy in the mode line, and PRECISION is the maximum number of | |
11643 | characters to display from ELT's representation. See | |
11644 | display_string for details. * | |
a2889657 | 11645 | |
5f5c8ee5 | 11646 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
11647 | |
11648 | static int | |
5f5c8ee5 GM |
11649 | display_mode_element (it, depth, field_width, precision, elt) |
11650 | struct it *it; | |
a2889657 | 11651 | int depth; |
5f5c8ee5 GM |
11652 | int field_width, precision; |
11653 | Lisp_Object elt; | |
a2889657 | 11654 | { |
5f5c8ee5 GM |
11655 | int n = 0, field, prec; |
11656 | ||
a2889657 JB |
11657 | tail_recurse: |
11658 | if (depth > 10) | |
11659 | goto invalid; | |
11660 | ||
11661 | depth++; | |
11662 | ||
0220c518 | 11663 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
11664 | { |
11665 | case Lisp_String: | |
11666 | { | |
11667 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
11668 | unsigned char c; |
11669 | unsigned char *this = XSTRING (elt)->data; | |
11670 | unsigned char *lisp_string = this; | |
11671 | ||
11672 | while ((precision <= 0 || n < precision) | |
11673 | && *this | |
11674 | && (frame_title_ptr | |
11675 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
11676 | { |
11677 | unsigned char *last = this; | |
5f5c8ee5 GM |
11678 | |
11679 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
11680 | while ((c = *this++) != '\0' && c != '%') |
11681 | ; | |
5f5c8ee5 | 11682 | |
a2889657 JB |
11683 | if (this - 1 != last) |
11684 | { | |
5f5c8ee5 GM |
11685 | /* Output to end of string or up to '%'. Field width |
11686 | is length of string. Don't output more than | |
11687 | PRECISION allows us. */ | |
11688 | prec = --this - last; | |
11689 | if (precision > 0 && prec > precision - n) | |
11690 | prec = precision - n; | |
11691 | ||
d39b6696 | 11692 | if (frame_title_ptr) |
5f5c8ee5 | 11693 | n += store_frame_title (last, prec, prec); |
d39b6696 | 11694 | else |
5f5c8ee5 GM |
11695 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
11696 | it, 0, prec, 0, -1); | |
a2889657 JB |
11697 | } |
11698 | else /* c == '%' */ | |
11699 | { | |
5f5c8ee5 GM |
11700 | unsigned char *percent_position = this; |
11701 | ||
11702 | /* Get the specified minimum width. Zero means | |
11703 | don't pad. */ | |
11704 | field = 0; | |
a2889657 | 11705 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 11706 | field = field * 10 + c - '0'; |
a2889657 | 11707 | |
5f5c8ee5 GM |
11708 | /* Don't pad beyond the total padding allowed. */ |
11709 | if (field_width - n > 0 && field > field_width - n) | |
11710 | field = field_width - n; | |
a2889657 | 11711 | |
5f5c8ee5 GM |
11712 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
11713 | prec = precision - n; | |
11714 | ||
a2889657 | 11715 | if (c == 'M') |
5f5c8ee5 GM |
11716 | n += display_mode_element (it, depth, field, prec, |
11717 | Vglobal_mode_string); | |
a2889657 | 11718 | else if (c != 0) |
d39b6696 | 11719 | { |
5f5c8ee5 GM |
11720 | unsigned char *spec |
11721 | = decode_mode_spec (it->w, c, field, prec); | |
11722 | ||
d39b6696 | 11723 | if (frame_title_ptr) |
5f5c8ee5 | 11724 | n += store_frame_title (spec, field, prec); |
d39b6696 | 11725 | else |
5f5c8ee5 GM |
11726 | { |
11727 | int nglyphs_before | |
11728 | = it->glyph_row->used[TEXT_AREA]; | |
11729 | int charpos | |
11730 | = percent_position - XSTRING (elt)->data; | |
11731 | int nwritten | |
11732 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
11733 | field, prec, 0, -1); | |
11734 | ||
11735 | /* Assign to the glyphs written above the | |
11736 | string where the `%x' came from, position | |
11737 | of the `%'. */ | |
11738 | if (nwritten > 0) | |
11739 | { | |
11740 | struct glyph *glyph | |
11741 | = (it->glyph_row->glyphs[TEXT_AREA] | |
11742 | + nglyphs_before); | |
11743 | int i; | |
11744 | ||
11745 | for (i = 0; i < nwritten; ++i) | |
11746 | { | |
11747 | glyph[i].object = elt; | |
11748 | glyph[i].charpos = charpos; | |
11749 | } | |
11750 | ||
11751 | n += nwritten; | |
11752 | } | |
11753 | } | |
d39b6696 | 11754 | } |
a2889657 JB |
11755 | } |
11756 | } | |
11757 | } | |
11758 | break; | |
11759 | ||
11760 | case Lisp_Symbol: | |
11761 | /* A symbol: process the value of the symbol recursively | |
11762 | as if it appeared here directly. Avoid error if symbol void. | |
11763 | Special case: if value of symbol is a string, output the string | |
11764 | literally. */ | |
11765 | { | |
11766 | register Lisp_Object tem; | |
11767 | tem = Fboundp (elt); | |
265a9e55 | 11768 | if (!NILP (tem)) |
a2889657 JB |
11769 | { |
11770 | tem = Fsymbol_value (elt); | |
11771 | /* If value is a string, output that string literally: | |
11772 | don't check for % within it. */ | |
e24c997d | 11773 | if (STRINGP (tem)) |
d39b6696 | 11774 | { |
5f5c8ee5 GM |
11775 | prec = XSTRING (tem)->size; |
11776 | if (precision > 0 && prec > precision - n) | |
11777 | prec = precision - n; | |
d39b6696 | 11778 | if (frame_title_ptr) |
5f5c8ee5 | 11779 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 11780 | else |
5f5c8ee5 GM |
11781 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
11782 | 0, prec, 0, -1); | |
d39b6696 | 11783 | } |
a2889657 | 11784 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
11785 | { |
11786 | /* Give up right away for nil or t. */ | |
11787 | elt = tem; | |
11788 | goto tail_recurse; | |
11789 | } | |
a2889657 JB |
11790 | } |
11791 | } | |
11792 | break; | |
11793 | ||
11794 | case Lisp_Cons: | |
11795 | { | |
11796 | register Lisp_Object car, tem; | |
11797 | ||
11798 | /* A cons cell: three distinct cases. | |
11799 | If first element is a string or a cons, process all the elements | |
11800 | and effectively concatenate them. | |
11801 | If first element is a negative number, truncate displaying cdr to | |
11802 | at most that many characters. If positive, pad (with spaces) | |
11803 | to at least that many characters. | |
11804 | If first element is a symbol, process the cadr or caddr recursively | |
11805 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 11806 | car = XCAR (elt); |
5f5c8ee5 GM |
11807 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
11808 | { | |
11809 | /* An element of the form (:eval FORM) means evaluate FORM | |
11810 | and use the result as mode line elements. */ | |
11811 | struct gcpro gcpro1; | |
11812 | Lisp_Object spec; | |
11813 | ||
11814 | spec = eval_form (XCAR (XCDR (elt))); | |
11815 | GCPRO1 (spec); | |
11816 | n += display_mode_element (it, depth, field_width - n, | |
11817 | precision - n, spec); | |
11818 | UNGCPRO; | |
11819 | } | |
11820 | else if (SYMBOLP (car)) | |
a2889657 JB |
11821 | { |
11822 | tem = Fboundp (car); | |
9472f927 | 11823 | elt = XCDR (elt); |
e24c997d | 11824 | if (!CONSP (elt)) |
a2889657 JB |
11825 | goto invalid; |
11826 | /* elt is now the cdr, and we know it is a cons cell. | |
11827 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 11828 | if (!NILP (tem)) |
a2889657 JB |
11829 | { |
11830 | tem = Fsymbol_value (car); | |
265a9e55 | 11831 | if (!NILP (tem)) |
9472f927 GM |
11832 | { |
11833 | elt = XCAR (elt); | |
11834 | goto tail_recurse; | |
11835 | } | |
a2889657 JB |
11836 | } |
11837 | /* Symbol's value is nil (or symbol is unbound) | |
11838 | Get the cddr of the original list | |
11839 | and if possible find the caddr and use that. */ | |
9472f927 | 11840 | elt = XCDR (elt); |
265a9e55 | 11841 | if (NILP (elt)) |
a2889657 | 11842 | break; |
e24c997d | 11843 | else if (!CONSP (elt)) |
a2889657 | 11844 | goto invalid; |
9472f927 | 11845 | elt = XCAR (elt); |
a2889657 JB |
11846 | goto tail_recurse; |
11847 | } | |
e24c997d | 11848 | else if (INTEGERP (car)) |
a2889657 JB |
11849 | { |
11850 | register int lim = XINT (car); | |
9472f927 | 11851 | elt = XCDR (elt); |
a2889657 | 11852 | if (lim < 0) |
5f5c8ee5 GM |
11853 | { |
11854 | /* Negative int means reduce maximum width. */ | |
11855 | if (precision <= 0) | |
11856 | precision = -lim; | |
11857 | else | |
11858 | precision = min (precision, -lim); | |
11859 | } | |
a2889657 JB |
11860 | else if (lim > 0) |
11861 | { | |
11862 | /* Padding specified. Don't let it be more than | |
11863 | current maximum. */ | |
5f5c8ee5 GM |
11864 | if (precision > 0) |
11865 | lim = min (precision, lim); | |
11866 | ||
a2889657 JB |
11867 | /* If that's more padding than already wanted, queue it. |
11868 | But don't reduce padding already specified even if | |
11869 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 11870 | field_width = max (lim, field_width); |
a2889657 JB |
11871 | } |
11872 | goto tail_recurse; | |
11873 | } | |
e24c997d | 11874 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
11875 | { |
11876 | register int limit = 50; | |
5f5c8ee5 GM |
11877 | /* Limit is to protect against circular lists. */ |
11878 | while (CONSP (elt) | |
11879 | && --limit > 0 | |
11880 | && (precision <= 0 || n < precision)) | |
a2889657 | 11881 | { |
5f5c8ee5 | 11882 | n += display_mode_element (it, depth, field_width - n, |
9472f927 GM |
11883 | precision - n, XCAR (elt)); |
11884 | elt = XCDR (elt); | |
a2889657 JB |
11885 | } |
11886 | } | |
11887 | } | |
11888 | break; | |
11889 | ||
11890 | default: | |
11891 | invalid: | |
d39b6696 | 11892 | if (frame_title_ptr) |
5f5c8ee5 | 11893 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 11894 | else |
5f5c8ee5 GM |
11895 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
11896 | precision - n, 0, 0); | |
11897 | return n; | |
a2889657 JB |
11898 | } |
11899 | ||
5f5c8ee5 GM |
11900 | /* Pad to FIELD_WIDTH. */ |
11901 | if (field_width > 0 && n < field_width) | |
11902 | { | |
11903 | if (frame_title_ptr) | |
11904 | n += store_frame_title ("", field_width - n, 0); | |
11905 | else | |
11906 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
11907 | 0, 0, 0); | |
11908 | } | |
11909 | ||
11910 | return n; | |
a2889657 | 11911 | } |
5f5c8ee5 GM |
11912 | |
11913 | ||
766525bc RS |
11914 | /* Write a null-terminated, right justified decimal representation of |
11915 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
11916 | ||
11917 | static void | |
11918 | pint2str (buf, width, d) | |
11919 | register char *buf; | |
11920 | register int width; | |
11921 | register int d; | |
11922 | { | |
11923 | register char *p = buf; | |
11924 | ||
11925 | if (d <= 0) | |
5f5c8ee5 | 11926 | *p++ = '0'; |
766525bc | 11927 | else |
5f5c8ee5 | 11928 | { |
766525bc | 11929 | while (d > 0) |
5f5c8ee5 | 11930 | { |
766525bc RS |
11931 | *p++ = d % 10 + '0'; |
11932 | d /= 10; | |
5f5c8ee5 GM |
11933 | } |
11934 | } | |
11935 | ||
11936 | for (width -= (int) (p - buf); width > 0; --width) | |
11937 | *p++ = ' '; | |
766525bc RS |
11938 | *p-- = '\0'; |
11939 | while (p > buf) | |
5f5c8ee5 | 11940 | { |
766525bc RS |
11941 | d = *buf; |
11942 | *buf++ = *p; | |
11943 | *p-- = d; | |
5f5c8ee5 | 11944 | } |
766525bc RS |
11945 | } |
11946 | ||
5f5c8ee5 | 11947 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
11948 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
11949 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
11950 | ||
6693a99a | 11951 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 11952 | |
1c9241f5 KH |
11953 | static char * |
11954 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
11955 | Lisp_Object coding_system; | |
11956 | register char *buf; | |
11957 | int eol_flag; | |
11958 | { | |
1e1078d6 | 11959 | Lisp_Object val; |
916848d8 | 11960 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
11961 | unsigned char *eol_str; |
11962 | int eol_str_len; | |
11963 | /* The EOL conversion we are using. */ | |
11964 | Lisp_Object eoltype; | |
1e1078d6 | 11965 | |
4a09dee0 | 11966 | val = Fget (coding_system, Qcoding_system); |
1c9241f5 | 11967 | |
4a09dee0 | 11968 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 11969 | { |
916848d8 RS |
11970 | if (multibyte) |
11971 | *buf++ = '-'; | |
21e989e3 | 11972 | if (eol_flag) |
302f2b38 | 11973 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 11974 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
11975 | } |
11976 | else | |
11977 | { | |
1e1078d6 RS |
11978 | Lisp_Object eolvalue; |
11979 | ||
11980 | eolvalue = Fget (coding_system, Qeol_type); | |
11981 | ||
916848d8 RS |
11982 | if (multibyte) |
11983 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
11984 | ||
1c9241f5 KH |
11985 | if (eol_flag) |
11986 | { | |
1e1078d6 RS |
11987 | /* The EOL conversion that is normal on this system. */ |
11988 | ||
11989 | if (NILP (eolvalue)) /* Not yet decided. */ | |
11990 | eoltype = eol_mnemonic_undecided; | |
11991 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
11992 | eoltype = eol_mnemonic_undecided; | |
11993 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
11994 | eoltype = (XFASTINT (eolvalue) == 0 | |
11995 | ? eol_mnemonic_unix | |
11996 | : (XFASTINT (eolvalue) == 1 | |
11997 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
11998 | } |
11999 | } | |
5f5c8ee5 | 12000 | |
302f2b38 EZ |
12001 | if (eol_flag) |
12002 | { | |
12003 | /* Mention the EOL conversion if it is not the usual one. */ | |
12004 | if (STRINGP (eoltype)) | |
12005 | { | |
12006 | eol_str = XSTRING (eoltype)->data; | |
12007 | eol_str_len = XSTRING (eoltype)->size; | |
12008 | } | |
f30b3499 KH |
12009 | else if (INTEGERP (eoltype) |
12010 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
12011 | { | |
4a09dee0 | 12012 | eol_str = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
260a86a0 | 12013 | eol_str_len = CHAR_STRING (XINT (eoltype), eol_str); |
f30b3499 | 12014 | } |
302f2b38 EZ |
12015 | else |
12016 | { | |
12017 | eol_str = invalid_eol_type; | |
12018 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 12019 | } |
f30b3499 | 12020 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 12021 | buf += eol_str_len; |
1c9241f5 | 12022 | } |
302f2b38 | 12023 | |
1c9241f5 KH |
12024 | return buf; |
12025 | } | |
12026 | ||
a2889657 | 12027 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
12028 | generated by character C. PRECISION >= 0 means don't return a |
12029 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
12030 | string returned with spaces to that value. */ | |
a2889657 | 12031 | |
11e82b76 JB |
12032 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
12033 | ||
a2889657 | 12034 | static char * |
5f5c8ee5 | 12035 | decode_mode_spec (w, c, field_width, precision) |
a2889657 | 12036 | struct window *w; |
68c45bf0 | 12037 | register int c; |
5f5c8ee5 | 12038 | int field_width, precision; |
a2889657 | 12039 | { |
0b67772d | 12040 | Lisp_Object obj; |
5f5c8ee5 GM |
12041 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
12042 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 12043 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 12044 | |
0b67772d | 12045 | obj = Qnil; |
a2889657 JB |
12046 | |
12047 | switch (c) | |
12048 | { | |
1af9f229 RS |
12049 | case '*': |
12050 | if (!NILP (b->read_only)) | |
12051 | return "%"; | |
12052 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12053 | return "*"; | |
12054 | return "-"; | |
12055 | ||
12056 | case '+': | |
12057 | /* This differs from %* only for a modified read-only buffer. */ | |
12058 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12059 | return "*"; | |
12060 | if (!NILP (b->read_only)) | |
12061 | return "%"; | |
12062 | return "-"; | |
12063 | ||
12064 | case '&': | |
12065 | /* This differs from %* in ignoring read-only-ness. */ | |
12066 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12067 | return "*"; | |
12068 | return "-"; | |
12069 | ||
12070 | case '%': | |
12071 | return "%"; | |
12072 | ||
12073 | case '[': | |
12074 | { | |
12075 | int i; | |
12076 | char *p; | |
12077 | ||
12078 | if (command_loop_level > 5) | |
12079 | return "[[[... "; | |
12080 | p = decode_mode_spec_buf; | |
12081 | for (i = 0; i < command_loop_level; i++) | |
12082 | *p++ = '['; | |
12083 | *p = 0; | |
12084 | return decode_mode_spec_buf; | |
12085 | } | |
12086 | ||
12087 | case ']': | |
12088 | { | |
12089 | int i; | |
12090 | char *p; | |
12091 | ||
12092 | if (command_loop_level > 5) | |
12093 | return " ...]]]"; | |
12094 | p = decode_mode_spec_buf; | |
12095 | for (i = 0; i < command_loop_level; i++) | |
12096 | *p++ = ']'; | |
12097 | *p = 0; | |
12098 | return decode_mode_spec_buf; | |
12099 | } | |
12100 | ||
12101 | case '-': | |
12102 | { | |
1af9f229 | 12103 | register int i; |
5f5c8ee5 GM |
12104 | |
12105 | /* Let lots_of_dashes be a string of infinite length. */ | |
12106 | if (field_width <= 0 | |
12107 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 12108 | { |
5f5c8ee5 GM |
12109 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
12110 | decode_mode_spec_buf[i] = '-'; | |
12111 | decode_mode_spec_buf[i] = '\0'; | |
12112 | return decode_mode_spec_buf; | |
1af9f229 | 12113 | } |
5f5c8ee5 GM |
12114 | else |
12115 | return lots_of_dashes; | |
1af9f229 RS |
12116 | } |
12117 | ||
a2889657 | 12118 | case 'b': |
d39b6696 | 12119 | obj = b->name; |
a2889657 JB |
12120 | break; |
12121 | ||
1af9f229 RS |
12122 | case 'c': |
12123 | { | |
12124 | int col = current_column (); | |
12125 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 12126 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
12127 | return decode_mode_spec_buf; |
12128 | } | |
12129 | ||
12130 | case 'F': | |
12131 | /* %F displays the frame name. */ | |
5f5c8ee5 | 12132 | if (!NILP (f->title)) |
95184b48 | 12133 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 12134 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 12135 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 12136 | return "Emacs"; |
1af9f229 | 12137 | |
a2889657 | 12138 | case 'f': |
d39b6696 | 12139 | obj = b->filename; |
a2889657 JB |
12140 | break; |
12141 | ||
aa6d10fa RS |
12142 | case 'l': |
12143 | { | |
12adba34 RS |
12144 | int startpos = XMARKER (w->start)->charpos; |
12145 | int startpos_byte = marker_byte_position (w->start); | |
12146 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 12147 | int nlines, junk; |
aa6d10fa RS |
12148 | int height = XFASTINT (w->height); |
12149 | ||
12150 | /* If we decided that this buffer isn't suitable for line numbers, | |
12151 | don't forget that too fast. */ | |
12152 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 12153 | goto no_value; |
5300fd39 RS |
12154 | /* But do forget it, if the window shows a different buffer now. */ |
12155 | else if (BUFFERP (w->base_line_pos)) | |
12156 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
12157 | |
12158 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 12159 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
12160 | { |
12161 | w->base_line_pos = Qnil; | |
12162 | w->base_line_number = Qnil; | |
766525bc | 12163 | goto no_value; |
aa6d10fa RS |
12164 | } |
12165 | ||
12166 | if (!NILP (w->base_line_number) | |
12167 | && !NILP (w->base_line_pos) | |
12adba34 | 12168 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
12169 | { |
12170 | line = XFASTINT (w->base_line_number); | |
12171 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 12172 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
12173 | } |
12174 | else | |
12175 | { | |
12176 | line = 1; | |
d39b6696 | 12177 | linepos = BUF_BEGV (b); |
12adba34 | 12178 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
12179 | } |
12180 | ||
12181 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
12182 | nlines = display_count_lines (linepos, linepos_byte, |
12183 | startpos_byte, | |
12184 | startpos, &junk); | |
aa6d10fa RS |
12185 | |
12186 | topline = nlines + line; | |
12187 | ||
12188 | /* Determine a new base line, if the old one is too close | |
12189 | or too far away, or if we did not have one. | |
12190 | "Too close" means it's plausible a scroll-down would | |
12191 | go back past it. */ | |
d39b6696 | 12192 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 12193 | { |
c2213350 KH |
12194 | XSETFASTINT (w->base_line_number, topline); |
12195 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
12196 | } |
12197 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 12198 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 12199 | { |
d39b6696 | 12200 | int limit = BUF_BEGV (b); |
12adba34 | 12201 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 12202 | int position; |
5d121aec | 12203 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
12204 | |
12205 | if (startpos - distance > limit) | |
12adba34 RS |
12206 | { |
12207 | limit = startpos - distance; | |
12208 | limit_byte = CHAR_TO_BYTE (limit); | |
12209 | } | |
aa6d10fa | 12210 | |
12adba34 RS |
12211 | nlines = display_count_lines (startpos, startpos_byte, |
12212 | limit_byte, | |
12213 | - (height * 2 + 30), | |
aa6d10fa RS |
12214 | &position); |
12215 | /* If we couldn't find the lines we wanted within | |
5d121aec | 12216 | line_number_display_limit_width chars per line, |
aa6d10fa | 12217 | give up on line numbers for this window. */ |
12adba34 | 12218 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
12219 | { |
12220 | w->base_line_pos = w->buffer; | |
12221 | w->base_line_number = Qnil; | |
766525bc | 12222 | goto no_value; |
aa6d10fa RS |
12223 | } |
12224 | ||
c2213350 | 12225 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 12226 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
12227 | } |
12228 | ||
12229 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
12230 | nlines = display_count_lines (startpos, startpos_byte, |
12231 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
12232 | |
12233 | /* Record that we did display the line number. */ | |
12234 | line_number_displayed = 1; | |
12235 | ||
12236 | /* Make the string to show. */ | |
5f5c8ee5 | 12237 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 12238 | return decode_mode_spec_buf; |
766525bc RS |
12239 | no_value: |
12240 | { | |
12241 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
12242 | int pad = field_width - 2; |
12243 | while (pad-- > 0) | |
12244 | *p++ = ' '; | |
12245 | *p++ = '?'; | |
12246 | *p = '?'; | |
766525bc RS |
12247 | return decode_mode_spec_buf; |
12248 | } | |
aa6d10fa RS |
12249 | } |
12250 | break; | |
12251 | ||
a2889657 | 12252 | case 'm': |
d39b6696 | 12253 | obj = b->mode_name; |
a2889657 JB |
12254 | break; |
12255 | ||
12256 | case 'n': | |
d39b6696 | 12257 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
12258 | return " Narrow"; |
12259 | break; | |
12260 | ||
a2889657 JB |
12261 | case 'p': |
12262 | { | |
12263 | int pos = marker_position (w->start); | |
d39b6696 | 12264 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 12265 | |
d39b6696 | 12266 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 12267 | { |
d39b6696 | 12268 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12269 | return "All"; |
12270 | else | |
12271 | return "Bottom"; | |
12272 | } | |
d39b6696 | 12273 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12274 | return "Top"; |
12275 | else | |
12276 | { | |
3c7d31b9 RS |
12277 | if (total > 1000000) |
12278 | /* Do it differently for a large value, to avoid overflow. */ | |
12279 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12280 | else | |
12281 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
12282 | /* We can't normally display a 3-digit number, |
12283 | so get us a 2-digit number that is close. */ | |
12284 | if (total == 100) | |
12285 | total = 99; | |
12286 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12287 | return decode_mode_spec_buf; | |
12288 | } | |
12289 | } | |
12290 | ||
8ffcb79f RS |
12291 | /* Display percentage of size above the bottom of the screen. */ |
12292 | case 'P': | |
12293 | { | |
12294 | int toppos = marker_position (w->start); | |
d39b6696 KH |
12295 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
12296 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 12297 | |
d39b6696 | 12298 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 12299 | { |
d39b6696 | 12300 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12301 | return "All"; |
12302 | else | |
12303 | return "Bottom"; | |
12304 | } | |
12305 | else | |
12306 | { | |
3c7d31b9 RS |
12307 | if (total > 1000000) |
12308 | /* Do it differently for a large value, to avoid overflow. */ | |
12309 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12310 | else | |
12311 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
12312 | /* We can't normally display a 3-digit number, |
12313 | so get us a 2-digit number that is close. */ | |
12314 | if (total == 100) | |
12315 | total = 99; | |
d39b6696 | 12316 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12317 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
12318 | else | |
12319 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12320 | return decode_mode_spec_buf; | |
12321 | } | |
12322 | } | |
12323 | ||
1af9f229 RS |
12324 | case 's': |
12325 | /* status of process */ | |
12326 | obj = Fget_buffer_process (w->buffer); | |
12327 | if (NILP (obj)) | |
12328 | return "no process"; | |
12329 | #ifdef subprocesses | |
12330 | obj = Fsymbol_name (Fprocess_status (obj)); | |
12331 | #endif | |
12332 | break; | |
d39b6696 | 12333 | |
1af9f229 RS |
12334 | case 't': /* indicate TEXT or BINARY */ |
12335 | #ifdef MODE_LINE_BINARY_TEXT | |
12336 | return MODE_LINE_BINARY_TEXT (b); | |
12337 | #else | |
12338 | return "T"; | |
12339 | #endif | |
1c9241f5 KH |
12340 | |
12341 | case 'z': | |
12342 | /* coding-system (not including end-of-line format) */ | |
12343 | case 'Z': | |
12344 | /* coding-system (including end-of-line type) */ | |
12345 | { | |
12346 | int eol_flag = (c == 'Z'); | |
539b4d41 | 12347 | char *p = decode_mode_spec_buf; |
1c9241f5 | 12348 | |
d30e754b | 12349 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 12350 | { |
11c52c4f RS |
12351 | /* No need to mention EOL here--the terminal never needs |
12352 | to do EOL conversion. */ | |
12353 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
12354 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 12355 | } |
f13c925f | 12356 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 12357 | p, eol_flag); |
f13c925f | 12358 | |
11c52c4f | 12359 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
12360 | #ifdef subprocesses |
12361 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
12362 | if (PROCESSP (obj)) | |
12363 | { | |
12364 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
12365 | p, eol_flag); | |
12366 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
12367 | p, eol_flag); | |
12368 | } | |
12369 | #endif /* subprocesses */ | |
11c52c4f | 12370 | #endif /* 0 */ |
1c9241f5 KH |
12371 | *p = 0; |
12372 | return decode_mode_spec_buf; | |
12373 | } | |
a2889657 | 12374 | } |
d39b6696 | 12375 | |
e24c997d | 12376 | if (STRINGP (obj)) |
a2889657 JB |
12377 | return (char *) XSTRING (obj)->data; |
12378 | else | |
12379 | return ""; | |
12380 | } | |
5f5c8ee5 GM |
12381 | |
12382 | ||
12adba34 RS |
12383 | /* Count up to COUNT lines starting from START / START_BYTE. |
12384 | But don't go beyond LIMIT_BYTE. | |
12385 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 12386 | |
12adba34 | 12387 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
12388 | |
12389 | static int | |
12adba34 RS |
12390 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
12391 | int start, start_byte, limit_byte, count; | |
12392 | int *byte_pos_ptr; | |
59b49f63 | 12393 | { |
59b49f63 RS |
12394 | register unsigned char *cursor; |
12395 | unsigned char *base; | |
12396 | ||
12397 | register int ceiling; | |
12398 | register unsigned char *ceiling_addr; | |
12adba34 | 12399 | int orig_count = count; |
59b49f63 RS |
12400 | |
12401 | /* If we are not in selective display mode, | |
12402 | check only for newlines. */ | |
12adba34 RS |
12403 | int selective_display = (!NILP (current_buffer->selective_display) |
12404 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
12405 | |
12406 | if (count > 0) | |
12adba34 RS |
12407 | { |
12408 | while (start_byte < limit_byte) | |
12409 | { | |
12410 | ceiling = BUFFER_CEILING_OF (start_byte); | |
12411 | ceiling = min (limit_byte - 1, ceiling); | |
12412 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
12413 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
12414 | while (1) | |
12415 | { | |
12416 | if (selective_display) | |
12417 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
12418 | ; | |
12419 | else | |
12420 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
12421 | ; | |
12422 | ||
12423 | if (cursor != ceiling_addr) | |
12424 | { | |
12425 | if (--count == 0) | |
12426 | { | |
12427 | start_byte += cursor - base + 1; | |
12428 | *byte_pos_ptr = start_byte; | |
12429 | return orig_count; | |
12430 | } | |
12431 | else | |
12432 | if (++cursor == ceiling_addr) | |
12433 | break; | |
12434 | } | |
12435 | else | |
12436 | break; | |
12437 | } | |
12438 | start_byte += cursor - base; | |
12439 | } | |
12440 | } | |
59b49f63 RS |
12441 | else |
12442 | { | |
12adba34 RS |
12443 | while (start_byte > limit_byte) |
12444 | { | |
12445 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
12446 | ceiling = max (limit_byte, ceiling); | |
12447 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
12448 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
12449 | while (1) |
12450 | { | |
12adba34 RS |
12451 | if (selective_display) |
12452 | while (--cursor != ceiling_addr | |
12453 | && *cursor != '\n' && *cursor != 015) | |
12454 | ; | |
12455 | else | |
12456 | while (--cursor != ceiling_addr && *cursor != '\n') | |
12457 | ; | |
12458 | ||
59b49f63 RS |
12459 | if (cursor != ceiling_addr) |
12460 | { | |
12461 | if (++count == 0) | |
12462 | { | |
12adba34 RS |
12463 | start_byte += cursor - base + 1; |
12464 | *byte_pos_ptr = start_byte; | |
12465 | /* When scanning backwards, we should | |
12466 | not count the newline posterior to which we stop. */ | |
12467 | return - orig_count - 1; | |
59b49f63 RS |
12468 | } |
12469 | } | |
12470 | else | |
12471 | break; | |
12472 | } | |
12adba34 RS |
12473 | /* Here we add 1 to compensate for the last decrement |
12474 | of CURSOR, which took it past the valid range. */ | |
12475 | start_byte += cursor - base + 1; | |
59b49f63 RS |
12476 | } |
12477 | } | |
12478 | ||
12adba34 | 12479 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 12480 | |
12adba34 RS |
12481 | if (count < 0) |
12482 | return - orig_count + count; | |
12483 | return orig_count - count; | |
aa6d10fa | 12484 | |
12adba34 | 12485 | } |
a2889657 | 12486 | |
a2889657 | 12487 | |
5f5c8ee5 GM |
12488 | \f |
12489 | /*********************************************************************** | |
12490 | Displaying strings | |
12491 | ***********************************************************************/ | |
278feba9 | 12492 | |
5f5c8ee5 | 12493 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 12494 | |
5f5c8ee5 GM |
12495 | If STRING is non-null, display that C string. Otherwise, the Lisp |
12496 | string LISP_STRING is displayed. | |
a2889657 | 12497 | |
5f5c8ee5 GM |
12498 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
12499 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
12500 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 12501 | |
5f5c8ee5 GM |
12502 | Display the string in the environment given by IT, but use the |
12503 | standard display table, temporarily. | |
a3788d53 | 12504 | |
5f5c8ee5 GM |
12505 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
12506 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
12507 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
12508 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
12509 | ||
12510 | PRECISION is the maximum number of characters to output from | |
12511 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 12512 | |
5f5c8ee5 | 12513 | This is roughly equivalent to printf format specifiers: |
a2889657 | 12514 | |
5f5c8ee5 GM |
12515 | FIELD_WIDTH PRECISION PRINTF |
12516 | ---------------------------------------- | |
12517 | -1 -1 %s | |
12518 | -1 10 %.10s | |
12519 | 10 -1 %10s | |
12520 | 20 10 %20.10s | |
a2889657 | 12521 | |
5f5c8ee5 GM |
12522 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
12523 | display them, and < 0 means obey the current buffer's value of | |
12524 | enable_multibyte_characters. | |
278feba9 | 12525 | |
5f5c8ee5 | 12526 | Value is the number of glyphs produced. */ |
b1d1124b | 12527 | |
5f5c8ee5 GM |
12528 | static int |
12529 | display_string (string, lisp_string, face_string, face_string_pos, | |
12530 | start, it, field_width, precision, max_x, multibyte) | |
12531 | unsigned char *string; | |
12532 | Lisp_Object lisp_string; | |
68c45bf0 PE |
12533 | Lisp_Object face_string; |
12534 | int face_string_pos; | |
5f5c8ee5 GM |
12535 | int start; |
12536 | struct it *it; | |
12537 | int field_width, precision, max_x; | |
12538 | int multibyte; | |
12539 | { | |
12540 | int hpos_at_start = it->hpos; | |
12541 | int saved_face_id = it->face_id; | |
12542 | struct glyph_row *row = it->glyph_row; | |
12543 | ||
12544 | /* Initialize the iterator IT for iteration over STRING beginning | |
12545 | with index START. We assume that IT may be modified here (which | |
12546 | means that display_line has to do something when displaying a | |
12547 | mini-buffer prompt, which it does). */ | |
12548 | reseat_to_string (it, string, lisp_string, start, | |
12549 | precision, field_width, multibyte); | |
12550 | ||
12551 | /* If displaying STRING, set up the face of the iterator | |
12552 | from LISP_STRING, if that's given. */ | |
12553 | if (STRINGP (face_string)) | |
12554 | { | |
12555 | int endptr; | |
12556 | struct face *face; | |
12557 | ||
12558 | it->face_id | |
12559 | = face_at_string_position (it->w, face_string, face_string_pos, | |
12560 | 0, it->region_beg_charpos, | |
12561 | it->region_end_charpos, | |
12562 | &endptr, it->base_face_id); | |
12563 | face = FACE_FROM_ID (it->f, it->face_id); | |
12564 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 12565 | } |
a2889657 | 12566 | |
5f5c8ee5 GM |
12567 | /* Set max_x to the maximum allowed X position. Don't let it go |
12568 | beyond the right edge of the window. */ | |
12569 | if (max_x <= 0) | |
12570 | max_x = it->last_visible_x; | |
12571 | else | |
12572 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 12573 | |
5f5c8ee5 GM |
12574 | /* Skip over display elements that are not visible. because IT->w is |
12575 | hscrolled. */ | |
12576 | if (it->current_x < it->first_visible_x) | |
12577 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
12578 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 12579 | |
5f5c8ee5 GM |
12580 | row->ascent = it->max_ascent; |
12581 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12582 | row->phys_ascent = it->max_phys_ascent; |
12583 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 12584 | |
5f5c8ee5 GM |
12585 | /* This condition is for the case that we are called with current_x |
12586 | past last_visible_x. */ | |
12587 | while (it->current_x < max_x) | |
a2889657 | 12588 | { |
5f5c8ee5 | 12589 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 12590 | |
5f5c8ee5 GM |
12591 | /* Get the next display element. */ |
12592 | if (!get_next_display_element (it)) | |
90adcf20 | 12593 | break; |
1c9241f5 | 12594 | |
5f5c8ee5 GM |
12595 | /* Produce glyphs. */ |
12596 | x_before = it->current_x; | |
12597 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
12598 | PRODUCE_GLYPHS (it); | |
90adcf20 | 12599 | |
5f5c8ee5 GM |
12600 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
12601 | i = 0; | |
12602 | x = x_before; | |
12603 | while (i < nglyphs) | |
a2889657 | 12604 | { |
5f5c8ee5 GM |
12605 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
12606 | ||
12607 | if (!it->truncate_lines_p | |
12608 | && x + glyph->pixel_width > max_x) | |
12609 | { | |
12610 | /* End of continued line or max_x reached. */ | |
12611 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
12612 | it->current_x = x; | |
12613 | break; | |
12614 | } | |
12615 | else if (x + glyph->pixel_width > it->first_visible_x) | |
12616 | { | |
12617 | /* Glyph is at least partially visible. */ | |
12618 | ++it->hpos; | |
12619 | if (x < it->first_visible_x) | |
12620 | it->glyph_row->x = x - it->first_visible_x; | |
12621 | } | |
12622 | else | |
a2889657 | 12623 | { |
5f5c8ee5 GM |
12624 | /* Glyph is off the left margin of the display area. |
12625 | Should not happen. */ | |
12626 | abort (); | |
a2889657 | 12627 | } |
5f5c8ee5 GM |
12628 | |
12629 | row->ascent = max (row->ascent, it->max_ascent); | |
12630 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12631 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12632 | row->phys_height = max (row->phys_height, | |
12633 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
12634 | x += glyph->pixel_width; |
12635 | ++i; | |
a2889657 | 12636 | } |
5f5c8ee5 GM |
12637 | |
12638 | /* Stop if max_x reached. */ | |
12639 | if (i < nglyphs) | |
12640 | break; | |
12641 | ||
12642 | /* Stop at line ends. */ | |
12643 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 12644 | { |
5f5c8ee5 GM |
12645 | it->continuation_lines_width = 0; |
12646 | break; | |
a2889657 | 12647 | } |
1c9241f5 | 12648 | |
5f5c8ee5 | 12649 | set_iterator_to_next (it); |
a688bb24 | 12650 | |
5f5c8ee5 GM |
12651 | /* Stop if truncating at the right edge. */ |
12652 | if (it->truncate_lines_p | |
12653 | && it->current_x >= it->last_visible_x) | |
12654 | { | |
12655 | /* Add truncation mark, but don't do it if the line is | |
12656 | truncated at a padding space. */ | |
12657 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 12658 | { |
5f5c8ee5 GM |
12659 | if (!FRAME_WINDOW_P (it->f)) |
12660 | produce_special_glyphs (it, IT_TRUNCATION); | |
12661 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 12662 | } |
5f5c8ee5 | 12663 | break; |
1c9241f5 | 12664 | } |
a2889657 JB |
12665 | } |
12666 | ||
5f5c8ee5 GM |
12667 | /* Maybe insert a truncation at the left. */ |
12668 | if (it->first_visible_x | |
12669 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 12670 | { |
5f5c8ee5 GM |
12671 | if (!FRAME_WINDOW_P (it->f)) |
12672 | insert_left_trunc_glyphs (it); | |
12673 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
12674 | } |
12675 | ||
5f5c8ee5 GM |
12676 | it->face_id = saved_face_id; |
12677 | ||
12678 | /* Value is number of columns displayed. */ | |
12679 | return it->hpos - hpos_at_start; | |
12680 | } | |
a2889657 | 12681 | |
a2889657 | 12682 | |
a2889657 | 12683 | \f |
5f5c8ee5 GM |
12684 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
12685 | appears as an element of LIST or as the car of an element of LIST. | |
12686 | If PROPVAL is a list, compare each element against LIST in that | |
12687 | way, and return 1 if any element of PROPVAL is found in LIST. | |
12688 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12689 | |
12690 | int | |
12691 | invisible_p (propval, list) | |
12692 | register Lisp_Object propval; | |
12693 | Lisp_Object list; | |
12694 | { | |
af460d46 | 12695 | register Lisp_Object tail, proptail; |
9472f927 | 12696 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
642eefc6 RS |
12697 | { |
12698 | register Lisp_Object tem; | |
9472f927 | 12699 | tem = XCAR (tail); |
642eefc6 RS |
12700 | if (EQ (propval, tem)) |
12701 | return 1; | |
9472f927 | 12702 | if (CONSP (tem) && EQ (propval, XCAR (tem))) |
642eefc6 RS |
12703 | return 1; |
12704 | } | |
af460d46 RS |
12705 | if (CONSP (propval)) |
12706 | for (proptail = propval; CONSP (proptail); | |
9472f927 | 12707 | proptail = XCDR (proptail)) |
af460d46 RS |
12708 | { |
12709 | Lisp_Object propelt; | |
9472f927 GM |
12710 | propelt = XCAR (proptail); |
12711 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
12712 | { |
12713 | register Lisp_Object tem; | |
9472f927 | 12714 | tem = XCAR (tail); |
af460d46 RS |
12715 | if (EQ (propelt, tem)) |
12716 | return 1; | |
9472f927 | 12717 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) |
af460d46 RS |
12718 | return 1; |
12719 | } | |
12720 | } | |
642eefc6 RS |
12721 | return 0; |
12722 | } | |
12723 | ||
5f5c8ee5 GM |
12724 | |
12725 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
12726 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
12727 | each element of PROPVAL in that way, and the first time some | |
12728 | element is found, return 1 if the cdr of that element is non-nil. | |
12729 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12730 | |
12731 | int | |
12732 | invisible_ellipsis_p (propval, list) | |
12733 | register Lisp_Object propval; | |
12734 | Lisp_Object list; | |
12735 | { | |
af460d46 | 12736 | register Lisp_Object tail, proptail; |
9472f927 GM |
12737 | |
12738 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
642eefc6 RS |
12739 | { |
12740 | register Lisp_Object tem; | |
9472f927 GM |
12741 | tem = XCAR (tail); |
12742 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
12743 | return ! NILP (XCDR (tem)); | |
642eefc6 | 12744 | } |
9472f927 | 12745 | |
af460d46 | 12746 | if (CONSP (propval)) |
9472f927 | 12747 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) |
af460d46 RS |
12748 | { |
12749 | Lisp_Object propelt; | |
9472f927 GM |
12750 | propelt = XCAR (proptail); |
12751 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
12752 | { |
12753 | register Lisp_Object tem; | |
9472f927 GM |
12754 | tem = XCAR (tail); |
12755 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
12756 | return ! NILP (XCDR (tem)); | |
af460d46 RS |
12757 | } |
12758 | } | |
9472f927 | 12759 | |
642eefc6 RS |
12760 | return 0; |
12761 | } | |
5f5c8ee5 GM |
12762 | |
12763 | ||
642eefc6 | 12764 | \f |
5f5c8ee5 GM |
12765 | /*********************************************************************** |
12766 | Initialization | |
12767 | ***********************************************************************/ | |
12768 | ||
a2889657 JB |
12769 | void |
12770 | syms_of_xdisp () | |
12771 | { | |
c6e89d6c GM |
12772 | Vwith_echo_area_save_vector = Qnil; |
12773 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 12774 | |
c6e89d6c GM |
12775 | Vmessage_stack = Qnil; |
12776 | staticpro (&Vmessage_stack); | |
12777 | ||
735c094c | 12778 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 12779 | staticpro (&Qinhibit_redisplay); |
735c094c | 12780 | |
5f5c8ee5 GM |
12781 | #if GLYPH_DEBUG |
12782 | defsubr (&Sdump_glyph_matrix); | |
12783 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 12784 | defsubr (&Sdump_tool_bar_row); |
5f5c8ee5 | 12785 | defsubr (&Strace_redisplay_toggle); |
bf9249e3 | 12786 | defsubr (&Strace_to_stderr); |
5f5c8ee5 GM |
12787 | #endif |
12788 | ||
cf074754 RS |
12789 | staticpro (&Qmenu_bar_update_hook); |
12790 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
12791 | ||
d46fb96a | 12792 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 12793 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 12794 | |
399164b4 KH |
12795 | staticpro (&Qoverriding_local_map); |
12796 | Qoverriding_local_map = intern ("overriding-local-map"); | |
12797 | ||
75c43375 RS |
12798 | staticpro (&Qwindow_scroll_functions); |
12799 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
12800 | ||
e0bfbde6 RS |
12801 | staticpro (&Qredisplay_end_trigger_functions); |
12802 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 12803 | |
2e54982e RS |
12804 | staticpro (&Qinhibit_point_motion_hooks); |
12805 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
12806 | ||
9499d71b GM |
12807 | QCdata = intern (":data"); |
12808 | staticpro (&QCdata); | |
5f5c8ee5 | 12809 | Qdisplay = intern ("display"); |
f3751a65 | 12810 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
12811 | Qspace_width = intern ("space-width"); |
12812 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
12813 | Qraise = intern ("raise"); |
12814 | staticpro (&Qraise); | |
12815 | Qspace = intern ("space"); | |
12816 | staticpro (&Qspace); | |
f3751a65 GM |
12817 | Qmargin = intern ("margin"); |
12818 | staticpro (&Qmargin); | |
5f5c8ee5 | 12819 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 12820 | staticpro (&Qleft_margin); |
5f5c8ee5 | 12821 | Qright_margin = intern ("right-margin"); |
f3751a65 | 12822 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
12823 | Qalign_to = intern ("align-to"); |
12824 | staticpro (&Qalign_to); | |
12825 | QCalign_to = intern (":align-to"); | |
12826 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
12827 | Qrelative_width = intern ("relative-width"); |
12828 | staticpro (&Qrelative_width); | |
12829 | QCrelative_width = intern (":relative-width"); | |
12830 | staticpro (&QCrelative_width); | |
12831 | QCrelative_height = intern (":relative-height"); | |
12832 | staticpro (&QCrelative_height); | |
12833 | QCeval = intern (":eval"); | |
12834 | staticpro (&QCeval); | |
d3acf96b | 12835 | Qwhen = intern ("when"); |
f3751a65 | 12836 | staticpro (&Qwhen); |
886bd6f2 GM |
12837 | QCfile = intern (":file"); |
12838 | staticpro (&QCfile); | |
5f5c8ee5 GM |
12839 | Qfontified = intern ("fontified"); |
12840 | staticpro (&Qfontified); | |
12841 | Qfontification_functions = intern ("fontification-functions"); | |
12842 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
12843 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
12844 | staticpro (&Qtrailing_whitespace); | |
12845 | Qimage = intern ("image"); | |
12846 | staticpro (&Qimage); | |
12847 | ||
a2889657 JB |
12848 | last_arrow_position = Qnil; |
12849 | last_arrow_string = Qnil; | |
f3751a65 GM |
12850 | staticpro (&last_arrow_position); |
12851 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
12852 | |
12853 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
12854 | staticpro (&echo_buffer[0]); | |
12855 | staticpro (&echo_buffer[1]); | |
12856 | ||
12857 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
12858 | staticpro (&echo_area_buffer[0]); | |
12859 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 12860 | |
8f897821 GM |
12861 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
12862 | "Non-nil means highlight trailing whitespace.\n\ | |
12863 | The face used for trailing whitespace is `trailing-whitespace'."); | |
12864 | Vshow_trailing_whitespace = Qnil; | |
12865 | ||
735c094c KH |
12866 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
12867 | "Non-nil means don't actually do any redisplay.\n\ | |
12868 | This is used for internal purposes."); | |
12869 | Vinhibit_redisplay = Qnil; | |
12870 | ||
a2889657 | 12871 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 12872 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
12873 | Vglobal_mode_string = Qnil; |
12874 | ||
12875 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
12876 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
12877 | This must be the beginning of a line in order to work.\n\ | |
12878 | See also `overlay-arrow-string'."); | |
12879 | Voverlay_arrow_position = Qnil; | |
12880 | ||
12881 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
12882 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
12883 | Voverlay_arrow_string = Qnil; | |
12884 | ||
12885 | DEFVAR_INT ("scroll-step", &scroll_step, | |
12886 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
12887 | If that fails to bring point back on frame, point is centered instead.\n\ |
12888 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 12889 | |
0789adb2 | 12890 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
090f7baa GM |
12891 | "*Scroll up to this many lines, to bring point back on screen.\n\ |
12892 | A value of zero means to scroll the text to center point vertically\n\ | |
12893 | in the window."); | |
0789adb2 RS |
12894 | scroll_conservatively = 0; |
12895 | ||
9afd2168 RS |
12896 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
12897 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
12898 | Recenter the window whenever point gets within this many lines\n\ | |
12899 | of the top or bottom of the window."); | |
12900 | scroll_margin = 0; | |
12901 | ||
5f5c8ee5 | 12902 | #if GLYPH_DEBUG |
a2889657 | 12903 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 12904 | #endif |
a2889657 JB |
12905 | |
12906 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
12907 | &truncate_partial_width_windows, | |
44fa5b1e | 12908 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
12909 | truncate_partial_width_windows = 1; |
12910 | ||
12911 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
12912 | "*Non-nil means use inverse video for the mode line."); | |
12913 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
12914 | |
12915 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5f5c8ee5 | 12916 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 12917 | If the buffer is bigger than this, the line number does not appear\n\ |
9f027393 | 12918 | in the mode line."); |
aa6d10fa | 12919 | line_number_display_limit = 1000000; |
fba9ce76 | 12920 | |
5d121aec KH |
12921 | DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width, |
12922 | "*Maximum line width (in characters) for line number display.\n\ | |
12923 | If the average length of the lines near point is bigger than this, then the\n\ | |
12924 | line number may be omitted from the mode line."); | |
12925 | line_number_display_limit_width = 200; | |
12926 | ||
fba9ce76 RS |
12927 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
12928 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 12929 | highlight_nonselected_windows = 0; |
d39b6696 KH |
12930 | |
12931 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
12932 | "Non-nil if more than one frame is visible on this display.\n\ |
12933 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
12934 | This variable is not guaranteed to be accurate except while processing\n\ |
12935 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
12936 | |
12937 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 12938 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
12939 | \(Assuming the window manager supports this feature.)\n\ |
12940 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12941 | and is used only on frames for which no explicit name has been set\n\ | |
12942 | \(see `modify-frame-parameters')."); | |
12943 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 12944 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
12945 | \(Assuming the window manager supports this feature.)\n\ |
12946 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12947 | and is used only on frames for which no explicit name has been set\n\ | |
12948 | \(see `modify-frame-parameters')."); | |
12949 | Vicon_title_format | |
12950 | = Vframe_title_format | |
12951 | = Fcons (intern ("multiple-frames"), | |
12952 | Fcons (build_string ("%b"), | |
12953 | Fcons (Fcons (build_string (""), | |
12954 | Fcons (intern ("invocation-name"), | |
12955 | Fcons (build_string ("@"), | |
12956 | Fcons (intern ("system-name"), | |
12957 | Qnil)))), | |
12958 | Qnil))); | |
5992c4f7 KH |
12959 | |
12960 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
12961 | "Maximum number of lines to keep in the message log buffer.\n\ | |
12962 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
12963 | the buffer when it becomes large."); | |
12964 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
12965 | |
12966 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
12967 | "Functions called before redisplay, if window sizes have changed.\n\ | |
12968 | The value should be a list of functions that take one argument.\n\ | |
12969 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
12970 | size since the last redisplay, or have been split or deleted,\n\ | |
12971 | all the functions in the list are called, with the frame as argument."); | |
12972 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
12973 | |
12974 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 12975 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 12976 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
12977 | and its new display-start position. Note that the value of `window-end'\n\ |
12978 | is not valid when these functions are called."); | |
75c43375 | 12979 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 12980 | |
e037b9ec GM |
12981 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
12982 | "*Non-nil means automatically resize tool-bars.\n\ | |
12983 | This increases a tool-bar's height if not all tool-bar items are visible.\n\ | |
12984 | It decreases a tool-bar's height when it would display blank lines\n\ | |
5f5c8ee5 | 12985 | otherwise."); |
e037b9ec | 12986 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 12987 | |
e037b9ec GM |
12988 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
12989 | "*Non-nil means raise tool-bar buttons when the mouse moves over them."); | |
12990 | auto_raise_tool_bar_buttons_p = 1; | |
5f5c8ee5 | 12991 | |
e037b9ec GM |
12992 | DEFVAR_INT ("tool-bar-button-margin", &tool_bar_button_margin, |
12993 | "*Margin around tool-bar buttons in pixels."); | |
12994 | tool_bar_button_margin = 1; | |
5f5c8ee5 | 12995 | |
e037b9ec GM |
12996 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
12997 | "Relief thickness of tool-bar buttons."); | |
12998 | tool_bar_button_relief = 3; | |
5f5c8ee5 GM |
12999 | |
13000 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
13001 | "List of functions to call to fontify regions of text.\n\ | |
13002 | Each function is called with one argument POS. Functions must\n\ | |
13003 | fontify a region starting at POS in the current buffer, and give\n\ | |
13004 | fontified regions the property `fontified'.\n\ | |
13005 | This variable automatically becomes buffer-local when set."); | |
13006 | Vfontification_functions = Qnil; | |
13007 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
13008 | |
13009 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
13010 | &unibyte_display_via_language_environment, |
13011 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
13012 | Specifically this means that unibyte non-ASCII characters\n\ |
13013 | are displayed by converting them to the equivalent multibyte characters\n\ | |
13014 | according to the current language environment. As a result, they are\n\ | |
13015 | displayed according to the current fontset."); | |
13016 | unibyte_display_via_language_environment = 0; | |
c6e89d6c GM |
13017 | |
13018 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, | |
13019 | "*Maximum height for resizing mini-windows.\n\ | |
13020 | If a float, it specifies a fraction of the mini-window frame's height.\n\ | |
97cafc0f GM |
13021 | If an integer, it specifies a number of lines.\n\ |
13022 | If nil, don't resize."); | |
c6e89d6c | 13023 | Vmax_mini_window_height = make_float (0.25); |
d6d26ed3 GM |
13024 | |
13025 | DEFVAR_BOOL ("cursor-in-non-selected-windows", | |
13026 | &cursor_in_non_selected_windows, | |
13027 | "*Non-nil means display a hollow cursor in non-selected windows.\n\ | |
13028 | Nil means don't display a cursor there."); | |
13029 | cursor_in_non_selected_windows = 1; | |
a2889657 JB |
13030 | } |
13031 | ||
5f5c8ee5 GM |
13032 | |
13033 | /* Initialize this module when Emacs starts. */ | |
13034 | ||
dfcf069d | 13035 | void |
a2889657 JB |
13036 | init_xdisp () |
13037 | { | |
13038 | Lisp_Object root_window; | |
5f5c8ee5 | 13039 | struct window *mini_w; |
a2889657 | 13040 | |
5f5c8ee5 | 13041 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
13042 | |
13043 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 13044 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 13045 | |
a2889657 JB |
13046 | if (!noninteractive) |
13047 | { | |
5f5c8ee5 GM |
13048 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
13049 | int i; | |
13050 | ||
13051 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 13052 | set_window_height (root_window, |
5f5c8ee5 | 13053 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 13054 | 0); |
c2213350 | 13055 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
13056 | set_window_height (minibuf_window, 1, 0); |
13057 | ||
c2213350 KH |
13058 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
13059 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
13060 | |
13061 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
13062 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
13063 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
13064 | ||
13065 | /* The default ellipsis glyphs `...'. */ | |
13066 | for (i = 0; i < 3; ++i) | |
13067 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 13068 | } |
5f5c8ee5 GM |
13069 | |
13070 | #ifdef HAVE_WINDOW_SYSTEM | |
13071 | { | |
13072 | /* Allocate the buffer for frame titles. */ | |
13073 | int size = 100; | |
13074 | frame_title_buf = (char *) xmalloc (size); | |
13075 | frame_title_buf_end = frame_title_buf + size; | |
13076 | frame_title_ptr = NULL; | |
13077 | } | |
13078 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 13079 | } |
5f5c8ee5 GM |
13080 | |
13081 |