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a2889657 | 1 | /* Display generation from window structure and buffer text. |
5f5c8ee5 GM |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99 |
3 | Free Software Foundation, Inc. | |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 | 21 | |
5f5c8ee5 GM |
22 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
23 | ||
24 | Redisplay. | |
25 | ||
26 | Emacs separates the task of updating the display from code | |
27 | modifying global state, e.g. buffer text. This way functions | |
28 | operating on buffers don't also have to be concerned with updating | |
29 | the display. | |
30 | ||
31 | Updating the display is triggered by the Lisp interpreter when it | |
32 | decides it's time to do it. This is done either automatically for | |
33 | you as part of the interpreter's command loop or as the result of | |
34 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
35 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
36 | let's say almost---see the the description of direct update | |
37 | operations, below.). | |
38 | ||
39 | The following diagram shows how redisplay code is invoked. As you | |
40 | can see, Lisp calls redisplay and vice versa. Under window systems | |
41 | like X, some portions of the redisplay code are also called | |
42 | asynchronously during mouse movement or expose events. It is very | |
43 | important that these code parts do NOT use the C library (malloc, | |
44 | free) because many C libraries under Unix are not reentrant. They | |
45 | may also NOT call functions of the Lisp interpreter which could | |
46 | change the interpreter's state. If you don't follow these rules, | |
47 | you will encounter bugs which are very hard to explain. | |
48 | ||
49 | (Direct functions, see below) | |
50 | direct_output_for_insert, | |
51 | direct_forward_char (dispnew.c) | |
52 | +---------------------------------+ | |
53 | | | | |
54 | | V | |
55 | +--------------+ redisplay() +----------------+ | |
56 | | Lisp machine |---------------->| Redisplay code |<--+ | |
57 | +--------------+ (xdisp.c) +----------------+ | | |
58 | ^ | | | |
59 | +----------------------------------+ | | |
60 | Don't use this path when called | | |
61 | asynchronously! | | |
62 | | | |
63 | expose_window (asynchronous) | | |
64 | | | |
65 | X expose events -----+ | |
66 | ||
67 | What does redisplay? Obviously, it has to figure out somehow what | |
68 | has been changed since the last time the display has been updated, | |
69 | and to make these changes visible. Preferably it would do that in | |
70 | a moderately intelligent way, i.e. fast. | |
71 | ||
72 | Changes in buffer text can be deduced from window and buffer | |
73 | structures, and from some global variables like `beg_unchanged' and | |
74 | `end_unchanged'. The contents of the display are additionally | |
75 | recorded in a `glyph matrix', a two-dimensional matrix of glyph | |
76 | structures. Each row in such a matrix corresponds to a line on the | |
77 | display, and each glyph in a row corresponds to a column displaying | |
78 | a character, an image, or what else. This matrix is called the | |
79 | `current glyph matrix' or `current matrix' in redisplay | |
80 | terminology. | |
81 | ||
82 | For buffer parts that have been changed since the last update, a | |
83 | second glyph matrix is constructed, the so called `desired glyph | |
84 | matrix' or short `desired matrix'. Current and desired matrix are | |
85 | then compared to find a cheap way to update the display, e.g. by | |
86 | reusing part of the display by scrolling lines. | |
87 | ||
88 | ||
89 | Direct operations. | |
90 | ||
91 | You will find a lot of of redisplay optimizations when you start | |
92 | looking at the innards of redisplay. The overall goal of all these | |
93 | optimizations is to make redisplay fast because it is done | |
94 | frequently. | |
95 | ||
96 | Two optimizations are not found in xdisp.c. These are the direct | |
97 | operations mentioned above. As the name suggests they follow a | |
98 | different principle than the rest of redisplay. Instead of | |
99 | building a desired matrix and then comparing it with the current | |
100 | display, they perform their actions directly on the display and on | |
101 | the current matrix. | |
102 | ||
103 | One direct operation updates the display after one character has | |
104 | been entered. The other one moves the cursor by one position | |
105 | forward or backward. You find these functions under the names | |
106 | `direct_output_for_insert' and `direct_output_forward_char' in | |
107 | dispnew.c. | |
108 | ||
109 | ||
110 | Desired matrices. | |
111 | ||
112 | Desired matrices are always built per Emacs window. The function | |
113 | `display_line' is the central function to look at if you are | |
114 | interested. It constructs one row in a desired matrix given an | |
115 | iterator structure containing both a buffer position and a | |
116 | description of the environment in which the text is to be | |
117 | displayed. But this is too early, read on. | |
118 | ||
119 | Characters and pixmaps displayed for a range of buffer text depend | |
120 | on various settings of buffers and windows, on overlays and text | |
121 | properties, on display tables, on selective display. The good news | |
122 | is that all this hairy stuff is hidden behind a small set of | |
123 | interface functions taking a iterator structure (struct it) | |
124 | argument. | |
125 | ||
126 | Iteration over things to be be displayed is then simple. It is | |
127 | started by initializing an iterator with a call to init_iterator | |
128 | (or init_string_iterator for that matter). Calls to | |
129 | get_next_display_element fill the iterator structure with relevant | |
130 | information about the next thing to display. Calls to | |
131 | set_iterator_to_next move the iterator to the next thing. | |
132 | ||
133 | Besides this, an iterator also contains information about the | |
134 | display environment in which glyphs for display elements are to be | |
135 | produced. It has fields for the width and height of the display, | |
136 | the information whether long lines are truncated or continued, a | |
137 | current X and Y position, and lots of other stuff you can better | |
138 | see in dispextern.h. | |
139 | ||
140 | Glyphs in a desired matrix are normally constructed in a loop | |
141 | calling get_next_display_element and then produce_glyphs. The call | |
142 | to produce_glyphs will fill the iterator structure with pixel | |
143 | information about the element being displayed and at the same time | |
144 | produce glyphs for it. If the display element fits on the line | |
145 | being displayed, set_iterator_to_next is called next, otherwise the | |
146 | glyphs produced are discarded. | |
147 | ||
148 | ||
149 | Frame matrices. | |
150 | ||
151 | That just couldn't be all, could it? What about terminal types not | |
152 | supporting operations on sub-windows of the screen? To update the | |
153 | display on such a terminal, window-based glyph matrices are not | |
154 | well suited. To be able to reuse part of the display (scrolling | |
155 | lines up and down), we must instead have a view of the whole | |
156 | screen. This is what `frame matrices' are for. They are a trick. | |
157 | ||
158 | Frames on terminals like above have a glyph pool. Windows on such | |
159 | a frame sub-allocate their glyph memory from their frame's glyph | |
160 | pool. The frame itself is given its own glyph matrices. By | |
161 | coincidence---or maybe something else---rows in window glyph | |
162 | matrices are slices of corresponding rows in frame matrices. Thus | |
163 | writing to window matrices implicitly updates a frame matrix which | |
164 | provides us with the view of the whole screen that we originally | |
165 | wanted to have without having to move many bytes around. To be | |
166 | honest, there is a little bit more done, but not much more. If you | |
167 | plan to extend that code, take a look at dispnew.c. The function | |
168 | build_frame_matrix is a good starting point. */ | |
a2889657 | 169 | |
18160b98 | 170 | #include <config.h> |
a2889657 | 171 | #include <stdio.h> |
5f5c8ee5 GM |
172 | #ifdef STDC_HEADERS |
173 | #include <stdlib.h> | |
174 | #endif | |
a2889657 | 175 | #include "lisp.h" |
44fa5b1e | 176 | #include "frame.h" |
a2889657 JB |
177 | #include "window.h" |
178 | #include "termchar.h" | |
179 | #include "dispextern.h" | |
180 | #include "buffer.h" | |
1c9241f5 | 181 | #include "charset.h" |
a2889657 JB |
182 | #include "indent.h" |
183 | #include "commands.h" | |
184 | #include "macros.h" | |
185 | #include "disptab.h" | |
30c566e4 | 186 | #include "termhooks.h" |
b0a0fbda | 187 | #include "intervals.h" |
fe8b0cf8 | 188 | #include "keyboard.h" |
1c9241f5 KH |
189 | #include "coding.h" |
190 | #include "process.h" | |
dfcf069d AS |
191 | #include "region-cache.h" |
192 | ||
6d55d620 | 193 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
194 | #include "xterm.h" |
195 | #endif | |
a2889657 | 196 | |
5f5c8ee5 GM |
197 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
198 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
199 | ||
200 | #define INFINITY 10000000 | |
201 | ||
8f3343d0 | 202 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
76412d64 | 203 | extern void set_frame_menubar (); |
cd6dfed6 | 204 | extern int pending_menu_activation; |
76412d64 RS |
205 | #endif |
206 | ||
a2889657 JB |
207 | extern int interrupt_input; |
208 | extern int command_loop_level; | |
209 | ||
b6436d4e RS |
210 | extern int minibuffer_auto_raise; |
211 | ||
c4628384 RS |
212 | extern Lisp_Object Qface; |
213 | ||
399164b4 KH |
214 | extern Lisp_Object Voverriding_local_map; |
215 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 216 | extern Lisp_Object Qmenu_item; |
399164b4 | 217 | |
d46fb96a | 218 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 219 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 220 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 221 | Lisp_Object Qinhibit_point_motion_hooks; |
886bd6f2 | 222 | Lisp_Object QCeval, Qwhen, QCfile; |
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 | ||
254 | Lisp_Object Qdisplay, Qrelative_width, Qwidth, Qalign_to; | |
255 | extern Lisp_Object Qface, Qinvisible, Qimage; | |
256 | ||
257 | /* Symbols used in text property values. */ | |
258 | ||
259 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
260 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qheight, Qraise; | |
f3751a65 | 261 | Lisp_Object Qmargin; |
5f5c8ee5 | 262 | |
8f897821 | 263 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 264 | |
8f897821 | 265 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
266 | |
267 | /* Name of the face used to highlight trailing whitespace. */ | |
268 | ||
269 | Lisp_Object Qtrailing_whitespace; | |
270 | ||
271 | /* The symbol `image' which is the car of the lists used to represent | |
272 | images in Lisp. */ | |
273 | ||
274 | Lisp_Object Qimage; | |
275 | ||
276 | /* Non-zero means print newline to stdout before next mini-buffer | |
277 | message. */ | |
a2889657 JB |
278 | |
279 | int noninteractive_need_newline; | |
280 | ||
5f5c8ee5 | 281 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 282 | |
3c6595e0 | 283 | static int message_log_need_newline; |
f88eb0b6 | 284 | |
5f5c8ee5 GM |
285 | \f |
286 | /* The buffer position of the first character appearing entirely or | |
287 | partially on the line of the selected window which contains the | |
288 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
289 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 290 | |
5f5c8ee5 | 291 | static struct text_pos this_line_start_pos; |
a2889657 | 292 | |
5f5c8ee5 GM |
293 | /* Number of characters past the end of the line above, including the |
294 | terminating newline. */ | |
295 | ||
296 | static struct text_pos this_line_end_pos; | |
297 | ||
298 | /* The vertical positions and the height of this line. */ | |
a2889657 | 299 | |
a2889657 | 300 | static int this_line_vpos; |
5f5c8ee5 GM |
301 | static int this_line_y; |
302 | static int this_line_pixel_height; | |
303 | ||
304 | /* X position at which this display line starts. Usually zero; | |
305 | negative if first character is partially visible. */ | |
306 | ||
307 | static int this_line_start_x; | |
a2889657 | 308 | |
5f5c8ee5 | 309 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 310 | |
a2889657 JB |
311 | static struct buffer *this_line_buffer; |
312 | ||
5f5c8ee5 GM |
313 | /* Nonzero means truncate lines in all windows less wide than the |
314 | frame. */ | |
a2889657 | 315 | |
a2889657 JB |
316 | int truncate_partial_width_windows; |
317 | ||
7bbe686f | 318 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 319 | |
7bbe686f | 320 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
321 | |
322 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
323 | Not guaranteed to be accurate except while parsing | |
324 | frame-title-format. */ | |
7bbe686f | 325 | |
d39b6696 KH |
326 | int multiple_frames; |
327 | ||
a2889657 JB |
328 | Lisp_Object Vglobal_mode_string; |
329 | ||
330 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 331 | |
a2889657 JB |
332 | Lisp_Object Voverlay_arrow_position; |
333 | ||
5f5c8ee5 GM |
334 | /* String to display for the arrow. Only used on terminal frames. */ |
335 | ||
a2889657 JB |
336 | Lisp_Object Voverlay_arrow_string; |
337 | ||
5f5c8ee5 GM |
338 | /* Values of those variables at last redisplay. However, if |
339 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
340 | numerical position. */ | |
341 | ||
d45de95b RS |
342 | static Lisp_Object last_arrow_position, last_arrow_string; |
343 | ||
5f5c8ee5 GM |
344 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
345 | ||
d39b6696 KH |
346 | Lisp_Object Vframe_title_format; |
347 | ||
5f5c8ee5 GM |
348 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
349 | ||
d39b6696 KH |
350 | Lisp_Object Vicon_title_format; |
351 | ||
08b610e4 RS |
352 | /* List of functions to call when a window's size changes. These |
353 | functions get one arg, a frame on which one or more windows' sizes | |
354 | have changed. */ | |
5f5c8ee5 | 355 | |
08b610e4 RS |
356 | static Lisp_Object Vwindow_size_change_functions; |
357 | ||
cf074754 RS |
358 | Lisp_Object Qmenu_bar_update_hook; |
359 | ||
a2889657 | 360 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 361 | |
5f5c8ee5 | 362 | static int overlay_arrow_seen; |
ca26e1c8 | 363 | |
fba9ce76 | 364 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 365 | |
5f5c8ee5 GM |
366 | int highlight_nonselected_windows; |
367 | ||
368 | /* If cursor motion alone moves point off frame, try scrolling this | |
369 | many lines up or down if that will bring it back. */ | |
370 | ||
14510fee | 371 | static int scroll_step; |
a2889657 | 372 | |
5f5c8ee5 GM |
373 | /* Non-0 means scroll just far enough to bring point back on the |
374 | screen, when appropriate. */ | |
375 | ||
0789adb2 RS |
376 | static int scroll_conservatively; |
377 | ||
5f5c8ee5 GM |
378 | /* Recenter the window whenever point gets within this many lines of |
379 | the top or bottom of the window. This value is translated into a | |
380 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
381 | there is really a fixed pixel height scroll margin. */ | |
382 | ||
9afd2168 RS |
383 | int scroll_margin; |
384 | ||
5f5c8ee5 GM |
385 | /* Number of windows showing the buffer of the selected window (or |
386 | another buffer with the same base buffer). keyboard.c refers to | |
387 | this. */ | |
a2889657 | 388 | |
a2889657 JB |
389 | int buffer_shared; |
390 | ||
5f5c8ee5 | 391 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 392 | |
5f5c8ee5 | 393 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 394 | |
5f5c8ee5 | 395 | /* Nonzero means display mode line highlighted. */ |
a2889657 | 396 | |
a2889657 JB |
397 | int mode_line_inverse_video; |
398 | ||
5f5c8ee5 GM |
399 | /* Prompt to display in front of the mini-buffer contents. */ |
400 | ||
8c5b6a0a | 401 | Lisp_Object minibuf_prompt; |
a2889657 | 402 | |
5f5c8ee5 GM |
403 | /* Width of current mini-buffer prompt. Only set after display_line |
404 | of the line that contains the prompt. */ | |
405 | ||
a2889657 | 406 | int minibuf_prompt_width; |
5f5c8ee5 GM |
407 | int minibuf_prompt_pixel_width; |
408 | ||
5f5c8ee5 GM |
409 | /* This is the window where the echo area message was displayed. It |
410 | is always a mini-buffer window, but it may not be the same window | |
411 | currently active as a mini-buffer. */ | |
412 | ||
73af359d RS |
413 | Lisp_Object echo_area_window; |
414 | ||
c6e89d6c GM |
415 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
416 | pushes the current message and the value of | |
417 | message_enable_multibyte on the stack, the function restore_message | |
418 | pops the stack and displays MESSAGE again. */ | |
419 | ||
420 | Lisp_Object Vmessage_stack; | |
421 | ||
a3788d53 RS |
422 | /* Nonzero means multibyte characters were enabled when the echo area |
423 | message was specified. */ | |
5f5c8ee5 | 424 | |
a3788d53 RS |
425 | int message_enable_multibyte; |
426 | ||
5f5c8ee5 GM |
427 | /* True if we should redraw the mode lines on the next redisplay. */ |
428 | ||
a2889657 JB |
429 | int update_mode_lines; |
430 | ||
5f5c8ee5 GM |
431 | /* Nonzero if window sizes or contents have changed since last |
432 | redisplay that finished */ | |
433 | ||
a2889657 JB |
434 | int windows_or_buffers_changed; |
435 | ||
5f5c8ee5 GM |
436 | /* Nonzero after display_mode_line if %l was used and it displayed a |
437 | line number. */ | |
438 | ||
aa6d10fa RS |
439 | int line_number_displayed; |
440 | ||
441 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 442 | |
14510fee | 443 | static int line_number_display_limit; |
5992c4f7 | 444 | |
5d121aec KH |
445 | /* line width to consider when repostioning for line number display */ |
446 | ||
447 | static int line_number_display_limit_width; | |
448 | ||
5f5c8ee5 GM |
449 | /* Number of lines to keep in the message log buffer. t means |
450 | infinite. nil means don't log at all. */ | |
451 | ||
5992c4f7 | 452 | Lisp_Object Vmessage_log_max; |
d45de95b | 453 | |
c6e89d6c GM |
454 | /* Current, index 0, and last displayed echo area message. Either |
455 | buffers from echo_buffers, or nil to indicate no message. */ | |
456 | ||
457 | Lisp_Object echo_area_buffer[2]; | |
458 | ||
459 | /* The buffers referenced from echo_area_buffer. */ | |
460 | ||
461 | static Lisp_Object echo_buffer[2]; | |
462 | ||
463 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
464 | ||
465 | static Lisp_Object Vwith_echo_area_save_vector; | |
466 | ||
467 | /* Non-zero means display_echo_area should display the last echo area | |
468 | message again. Set by redisplay_preserve_echo_area. */ | |
469 | ||
470 | static int display_last_displayed_message_p; | |
471 | ||
472 | /* Nonzero if echo area is being used by print; zero if being used by | |
473 | message. */ | |
474 | ||
475 | int message_buf_print; | |
476 | ||
9142dd5b GM |
477 | /* Maximum height for resizing mini-windows. Either a float |
478 | specifying a fraction of the available height, or an integer | |
479 | specifying a number of lines. */ | |
c6e89d6c GM |
480 | |
481 | static Lisp_Object Vmax_mini_window_height; | |
482 | ||
5f5c8ee5 GM |
483 | /* A scratch glyph row with contents used for generating truncation |
484 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 485 | |
5f5c8ee5 GM |
486 | #define MAX_SCRATCH_GLYPHS 100 |
487 | struct glyph_row scratch_glyph_row; | |
488 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 489 | |
5f5c8ee5 GM |
490 | /* Ascent and height of the last line processed by move_it_to. */ |
491 | ||
492 | static int last_max_ascent, last_height; | |
493 | ||
494 | /* The maximum distance to look ahead for text properties. Values | |
495 | that are too small let us call compute_char_face and similar | |
496 | functions too often which is expensive. Values that are too large | |
497 | let us call compute_char_face and alike too often because we | |
498 | might not be interested in text properties that far away. */ | |
499 | ||
500 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
501 | ||
502 | /* Non-zero means print traces of redisplay if compiled with | |
503 | GLYPH_DEBUG != 0. */ | |
504 | ||
505 | #if GLYPH_DEBUG | |
506 | int trace_redisplay_p; | |
507 | #endif | |
508 | ||
509 | /* Value returned from text property handlers (see below). */ | |
510 | ||
511 | enum prop_handled | |
3c6595e0 | 512 | { |
5f5c8ee5 GM |
513 | HANDLED_NORMALLY, |
514 | HANDLED_RECOMPUTE_PROPS, | |
515 | HANDLED_OVERLAY_STRING_CONSUMED, | |
516 | HANDLED_RETURN | |
517 | }; | |
3c6595e0 | 518 | |
5f5c8ee5 GM |
519 | /* A description of text properties that redisplay is interested |
520 | in. */ | |
3c6595e0 | 521 | |
5f5c8ee5 GM |
522 | struct props |
523 | { | |
524 | /* The name of the property. */ | |
525 | Lisp_Object *name; | |
90adcf20 | 526 | |
5f5c8ee5 GM |
527 | /* A unique index for the property. */ |
528 | enum prop_idx idx; | |
529 | ||
530 | /* A handler function called to set up iterator IT from the property | |
531 | at IT's current position. Value is used to steer handle_stop. */ | |
532 | enum prop_handled (*handler) P_ ((struct it *it)); | |
533 | }; | |
534 | ||
535 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
536 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
537 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
538 | static enum prop_handled handle_overlay_change P_ ((struct it *)); | |
539 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
540 | ||
541 | /* Properties handled by iterators. */ | |
542 | ||
543 | static struct props it_props[] = | |
5992c4f7 | 544 | { |
5f5c8ee5 GM |
545 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
546 | /* Handle `face' before `display' because some sub-properties of | |
547 | `display' need to know the face. */ | |
548 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
549 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
550 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
551 | {NULL, 0, NULL} | |
552 | }; | |
5992c4f7 | 553 | |
5f5c8ee5 GM |
554 | /* Value is the position described by X. If X is a marker, value is |
555 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 556 | |
5f5c8ee5 | 557 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 558 | |
5f5c8ee5 | 559 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 560 | |
5f5c8ee5 GM |
561 | enum move_it_result |
562 | { | |
563 | /* Not used. Undefined value. */ | |
564 | MOVE_UNDEFINED, | |
bab29e15 | 565 | |
5f5c8ee5 GM |
566 | /* Move ended at the requested buffer position or ZV. */ |
567 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 568 | |
5f5c8ee5 GM |
569 | /* Move ended at the requested X pixel position. */ |
570 | MOVE_X_REACHED, | |
12adba34 | 571 | |
5f5c8ee5 GM |
572 | /* Move within a line ended at the end of a line that must be |
573 | continued. */ | |
574 | MOVE_LINE_CONTINUED, | |
575 | ||
576 | /* Move within a line ended at the end of a line that would | |
577 | be displayed truncated. */ | |
578 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 579 | |
5f5c8ee5 GM |
580 | /* Move within a line ended at a line end. */ |
581 | MOVE_NEWLINE_OR_CR | |
582 | }; | |
12adba34 | 583 | |
ff6c30e5 | 584 | |
5f5c8ee5 GM |
585 | \f |
586 | /* Function prototypes. */ | |
587 | ||
e037b9ec GM |
588 | static struct glyph_row *row_containing_pos P_ ((struct window *, int, |
589 | struct glyph_row *, | |
590 | struct glyph_row *)); | |
c6e89d6c GM |
591 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
592 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
c6e89d6c GM |
593 | static void clear_garbaged_frames P_ ((void)); |
594 | static int current_message_1 P_ ((Lisp_Object *)); | |
595 | static int truncate_message_1 P_ ((int)); | |
596 | static int set_message_1 P_ ((char *s, Lisp_Object, int, int)); | |
597 | static int display_echo_area P_ ((struct window *)); | |
598 | static int display_echo_area_1 P_ ((struct window *)); | |
28514cd9 | 599 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 600 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
601 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
602 | struct text_pos)); | |
603 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
604 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
605 | static Lisp_Object eval_form P_ ((Lisp_Object)); | |
606 | static void insert_left_trunc_glyphs P_ ((struct it *)); | |
607 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
608 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
609 | static void append_space P_ ((struct it *, int)); | |
610 | static void make_cursor_line_fully_visible P_ ((struct window *)); | |
611 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
612 | static int trailing_whitespace_p P_ ((int)); | |
613 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
614 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
615 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
616 | static void push_it P_ ((struct it *)); | |
617 | static void pop_it P_ ((struct it *)); | |
618 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
619 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 620 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
621 | static void redisplay_windows P_ ((Lisp_Object)); |
622 | static void redisplay_window P_ ((Lisp_Object, int)); | |
623 | static void update_menu_bar P_ ((struct frame *, int)); | |
624 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
625 | static int try_window_id P_ ((struct window *)); | |
626 | static int display_line P_ ((struct it *)); | |
627 | static void display_mode_lines P_ ((struct window *)); | |
628 | static void display_mode_line P_ ((struct window *, enum face_id, | |
629 | Lisp_Object)); | |
630 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
631 | static char *decode_mode_spec P_ ((struct window *, char, int, int)); | |
632 | static void display_menu_bar P_ ((struct window *)); | |
633 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
634 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
635 | int, int, struct it *, int, int, int, int)); | |
636 | static void compute_line_metrics P_ ((struct it *)); | |
637 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
638 | static int get_overlay_strings P_ ((struct it *)); | |
639 | static void next_overlay_string P_ ((struct it *)); | |
640 | void set_iterator_to_next P_ ((struct it *)); | |
641 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
642 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
643 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
644 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 645 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
646 | static int next_element_from_display_vector P_ ((struct it *)); |
647 | static int next_element_from_string P_ ((struct it *)); | |
648 | static int next_element_from_c_string P_ ((struct it *)); | |
649 | static int next_element_from_buffer P_ ((struct it *)); | |
650 | static int next_element_from_image P_ ((struct it *)); | |
651 | static int next_element_from_stretch P_ ((struct it *)); | |
652 | static void load_overlay_strings P_ ((struct it *)); | |
653 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
654 | struct display_pos *)); | |
655 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
656 | Lisp_Object, int, int, int, int)); | |
657 | static int charset_at_position P_ ((struct text_pos)); | |
658 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, | |
659 | int, int, int)); | |
660 | void move_it_vertically_backward P_ ((struct it *, int)); | |
661 | static void init_to_row_start P_ ((struct it *, struct window *, | |
662 | struct glyph_row *)); | |
663 | static void init_to_row_end P_ ((struct it *, struct window *, | |
664 | struct glyph_row *)); | |
665 | static void back_to_previous_line_start P_ ((struct it *)); | |
666 | static void forward_to_next_line_start P_ ((struct it *)); | |
667 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
668 | Lisp_Object, int)); | |
669 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
670 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
671 | static int number_of_chars P_ ((unsigned char *, int)); | |
672 | static void compute_stop_pos P_ ((struct it *)); | |
673 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
674 | Lisp_Object)); | |
675 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
676 | static int next_overlay_change P_ ((int)); | |
677 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
678 | Lisp_Object, struct text_pos *)); | |
679 | ||
680 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
681 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 682 | |
5f5c8ee5 | 683 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 684 | |
e037b9ec GM |
685 | static void update_tool_bar P_ ((struct frame *, int)); |
686 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
687 | static int redisplay_tool_bar P_ ((struct frame *)); | |
688 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 689 | |
5f5c8ee5 | 690 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 691 | |
5f5c8ee5 GM |
692 | \f |
693 | /*********************************************************************** | |
694 | Window display dimensions | |
695 | ***********************************************************************/ | |
12adba34 | 696 | |
5f5c8ee5 GM |
697 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
698 | text in window W. This is the height of W minus the height of a | |
699 | mode line, if any. */ | |
700 | ||
701 | INLINE int | |
702 | window_text_bottom_y (w) | |
703 | struct window *w; | |
704 | { | |
705 | struct frame *f = XFRAME (w->frame); | |
706 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
707 | ||
708 | if (WINDOW_WANTS_MODELINE_P (w)) | |
709 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
710 | return height; | |
f88eb0b6 KH |
711 | } |
712 | ||
f82aff7c | 713 | |
5f5c8ee5 GM |
714 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
715 | means return the total width of W, not including bitmap areas to | |
716 | the left and right of the window. */ | |
ff6c30e5 | 717 | |
5f5c8ee5 GM |
718 | INLINE int |
719 | window_box_width (w, area) | |
720 | struct window *w; | |
721 | int area; | |
722 | { | |
723 | struct frame *f = XFRAME (w->frame); | |
724 | int width = XFASTINT (w->width); | |
725 | ||
726 | if (!w->pseudo_window_p) | |
ff6c30e5 | 727 | { |
050d82d7 | 728 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FLAGS_AREA_COLS (f); |
5f5c8ee5 GM |
729 | |
730 | if (area == TEXT_AREA) | |
731 | { | |
732 | if (INTEGERP (w->left_margin_width)) | |
733 | width -= XFASTINT (w->left_margin_width); | |
734 | if (INTEGERP (w->right_margin_width)) | |
735 | width -= XFASTINT (w->right_margin_width); | |
736 | } | |
737 | else if (area == LEFT_MARGIN_AREA) | |
738 | width = (INTEGERP (w->left_margin_width) | |
739 | ? XFASTINT (w->left_margin_width) : 0); | |
740 | else if (area == RIGHT_MARGIN_AREA) | |
741 | width = (INTEGERP (w->right_margin_width) | |
742 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 743 | } |
5f5c8ee5 GM |
744 | |
745 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 746 | } |
1adc55de | 747 | |
1adc55de | 748 | |
5f5c8ee5 GM |
749 | /* Return the pixel height of the display area of window W, not |
750 | including mode lines of W, if any.. */ | |
f88eb0b6 | 751 | |
5f5c8ee5 GM |
752 | INLINE int |
753 | window_box_height (w) | |
754 | struct window *w; | |
f88eb0b6 | 755 | { |
5f5c8ee5 GM |
756 | struct frame *f = XFRAME (w->frame); |
757 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
758 | ||
759 | if (WINDOW_WANTS_MODELINE_P (w)) | |
760 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
761 | ||
045dee35 GM |
762 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
763 | height -= CURRENT_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
764 | |
765 | return height; | |
5992c4f7 KH |
766 | } |
767 | ||
768 | ||
5f5c8ee5 GM |
769 | /* Return the frame-relative coordinate of the left edge of display |
770 | area AREA of window W. AREA < 0 means return the left edge of the | |
771 | whole window, to the right of any bitmap area at the left side of | |
772 | W. */ | |
5992c4f7 | 773 | |
5f5c8ee5 GM |
774 | INLINE int |
775 | window_box_left (w, area) | |
776 | struct window *w; | |
777 | int area; | |
90adcf20 | 778 | { |
5f5c8ee5 GM |
779 | struct frame *f = XFRAME (w->frame); |
780 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 781 | |
5f5c8ee5 | 782 | if (!w->pseudo_window_p) |
90adcf20 | 783 | { |
5f5c8ee5 | 784 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
050d82d7 | 785 | + FRAME_LEFT_FLAGS_AREA_WIDTH (f)); |
5f5c8ee5 GM |
786 | |
787 | if (area == TEXT_AREA) | |
788 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
789 | else if (area == RIGHT_MARGIN_AREA) | |
790 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
791 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 792 | } |
73af359d | 793 | |
5f5c8ee5 GM |
794 | return x; |
795 | } | |
90adcf20 | 796 | |
b6436d4e | 797 | |
5f5c8ee5 GM |
798 | /* Return the frame-relative coordinate of the right edge of display |
799 | area AREA of window W. AREA < 0 means return the left edge of the | |
800 | whole window, to the left of any bitmap area at the right side of | |
801 | W. */ | |
ded34426 | 802 | |
5f5c8ee5 GM |
803 | INLINE int |
804 | window_box_right (w, area) | |
805 | struct window *w; | |
806 | int area; | |
807 | { | |
808 | return window_box_left (w, area) + window_box_width (w, area); | |
809 | } | |
810 | ||
811 | ||
812 | /* Get the bounding box of the display area AREA of window W, without | |
813 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
814 | whole window, not including bitmap areas to the left and right of | |
815 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
816 | coordinates of the upper-left corner of the box. Return in | |
817 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
818 | ||
819 | INLINE void | |
820 | window_box (w, area, box_x, box_y, box_width, box_height) | |
821 | struct window *w; | |
822 | int area; | |
823 | int *box_x, *box_y, *box_width, *box_height; | |
824 | { | |
825 | struct frame *f = XFRAME (w->frame); | |
826 | ||
827 | *box_width = window_box_width (w, area); | |
828 | *box_height = window_box_height (w); | |
829 | *box_x = window_box_left (w, area); | |
830 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
831 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
832 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
833 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 834 | } |
1adc55de | 835 | |
1adc55de | 836 | |
5f5c8ee5 GM |
837 | /* Get the bounding box of the display area AREA of window W, without |
838 | mode lines. AREA < 0 means the whole window, not including bitmap | |
839 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
840 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
841 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
842 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
843 | box. */ | |
ded34426 | 844 | |
5f5c8ee5 GM |
845 | INLINE void |
846 | window_box_edges (w, area, top_left_x, top_left_y, | |
847 | bottom_right_x, bottom_right_y) | |
848 | struct window *w; | |
849 | int area; | |
850 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 851 | { |
5f5c8ee5 GM |
852 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
853 | bottom_right_y); | |
854 | *bottom_right_x += *top_left_x; | |
855 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
856 | } |
857 | ||
5f5c8ee5 GM |
858 | |
859 | \f | |
860 | /*********************************************************************** | |
861 | Utilities | |
862 | ***********************************************************************/ | |
863 | ||
4fdb80f2 GM |
864 | /* Return the next character from STR which is MAXLEN bytes long. |
865 | Return in *LEN the length of the character. This is like | |
866 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
867 | we find one, we return a `?', but with the length of the illegal | |
868 | character. */ | |
869 | ||
870 | static INLINE int | |
7a5b8a93 | 871 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 872 | unsigned char *str; |
7a5b8a93 | 873 | int maxlen, *len; |
4fdb80f2 GM |
874 | { |
875 | int c; | |
876 | ||
877 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
878 | if (!CHAR_VALID_P (c, 1)) | |
879 | /* We may not change the length here because other places in Emacs | |
880 | don't use this function, i.e. they silently accept illegal | |
881 | characters. */ | |
882 | c = '?'; | |
883 | ||
884 | return c; | |
885 | } | |
886 | ||
887 | ||
888 | ||
5f5c8ee5 GM |
889 | /* Given a position POS containing a valid character and byte position |
890 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
891 | ||
892 | static struct text_pos | |
893 | string_pos_nchars_ahead (pos, string, nchars) | |
894 | struct text_pos pos; | |
895 | Lisp_Object string; | |
896 | int nchars; | |
0b1005ef | 897 | { |
5f5c8ee5 GM |
898 | xassert (STRINGP (string) && nchars >= 0); |
899 | ||
900 | if (STRING_MULTIBYTE (string)) | |
901 | { | |
902 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
903 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
904 | int len; | |
905 | ||
906 | while (nchars--) | |
907 | { | |
4fdb80f2 | 908 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
909 | p += len, rest -= len; |
910 | xassert (rest >= 0); | |
911 | CHARPOS (pos) += 1; | |
912 | BYTEPOS (pos) += len; | |
913 | } | |
914 | } | |
915 | else | |
916 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
917 | ||
918 | return pos; | |
0a9dc68b RS |
919 | } |
920 | ||
0a9dc68b | 921 | |
5f5c8ee5 GM |
922 | /* Value is the text position, i.e. character and byte position, |
923 | for character position CHARPOS in STRING. */ | |
924 | ||
925 | static INLINE struct text_pos | |
926 | string_pos (charpos, string) | |
927 | int charpos; | |
0a9dc68b | 928 | Lisp_Object string; |
0a9dc68b | 929 | { |
5f5c8ee5 GM |
930 | struct text_pos pos; |
931 | xassert (STRINGP (string)); | |
932 | xassert (charpos >= 0); | |
933 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
934 | return pos; | |
935 | } | |
936 | ||
937 | ||
938 | /* Value is a text position, i.e. character and byte position, for | |
939 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
940 | means recognize multibyte characters. */ | |
941 | ||
942 | static struct text_pos | |
943 | c_string_pos (charpos, s, multibyte_p) | |
944 | int charpos; | |
945 | unsigned char *s; | |
946 | int multibyte_p; | |
947 | { | |
948 | struct text_pos pos; | |
949 | ||
950 | xassert (s != NULL); | |
951 | xassert (charpos >= 0); | |
952 | ||
953 | if (multibyte_p) | |
0a9dc68b | 954 | { |
5f5c8ee5 GM |
955 | int rest = strlen (s), len; |
956 | ||
957 | SET_TEXT_POS (pos, 0, 0); | |
958 | while (charpos--) | |
0a9dc68b | 959 | { |
4fdb80f2 | 960 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
961 | s += len, rest -= len; |
962 | xassert (rest >= 0); | |
963 | CHARPOS (pos) += 1; | |
964 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
965 | } |
966 | } | |
5f5c8ee5 GM |
967 | else |
968 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 969 | |
5f5c8ee5 GM |
970 | return pos; |
971 | } | |
0a9dc68b | 972 | |
0a9dc68b | 973 | |
5f5c8ee5 GM |
974 | /* Value is the number of characters in C string S. MULTIBYTE_P |
975 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 976 | |
5f5c8ee5 GM |
977 | static int |
978 | number_of_chars (s, multibyte_p) | |
979 | unsigned char *s; | |
980 | int multibyte_p; | |
981 | { | |
982 | int nchars; | |
983 | ||
984 | if (multibyte_p) | |
985 | { | |
986 | int rest = strlen (s), len; | |
987 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 988 | |
5f5c8ee5 GM |
989 | for (nchars = 0; rest > 0; ++nchars) |
990 | { | |
4fdb80f2 | 991 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 992 | rest -= len, p += len; |
0a9dc68b RS |
993 | } |
994 | } | |
5f5c8ee5 GM |
995 | else |
996 | nchars = strlen (s); | |
997 | ||
998 | return nchars; | |
0b1005ef KH |
999 | } |
1000 | ||
5f5c8ee5 GM |
1001 | |
1002 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1003 | NEWPOS->charpos. POS is a known position in string STRING. | |
1004 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1005 | |
5f5c8ee5 GM |
1006 | static void |
1007 | compute_string_pos (newpos, pos, string) | |
1008 | struct text_pos *newpos, pos; | |
1009 | Lisp_Object string; | |
76412d64 | 1010 | { |
5f5c8ee5 GM |
1011 | xassert (STRINGP (string)); |
1012 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1013 | ||
1014 | if (STRING_MULTIBYTE (string)) | |
1015 | *newpos = string_pos_nchars_ahead (pos, CHARPOS (*newpos) - CHARPOS (pos), | |
1016 | string); | |
1017 | else | |
1018 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1019 | } |
1020 | ||
9c74a0dd | 1021 | |
5f5c8ee5 GM |
1022 | /* Return the charset of the character at position POS in |
1023 | current_buffer. */ | |
1adc55de | 1024 | |
5f5c8ee5 GM |
1025 | static int |
1026 | charset_at_position (pos) | |
1027 | struct text_pos pos; | |
a2889657 | 1028 | { |
5f5c8ee5 GM |
1029 | int c, multibyte_p; |
1030 | unsigned char *p = BYTE_POS_ADDR (BYTEPOS (pos)); | |
1031 | ||
1032 | multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1033 | if (multibyte_p) | |
a2889657 | 1034 | { |
5f5c8ee5 GM |
1035 | int maxlen = ((BYTEPOS (pos) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) |
1036 | - BYTEPOS (pos)); | |
1037 | int len; | |
4fdb80f2 | 1038 | c = string_char_and_length (p, maxlen, &len); |
a2889657 | 1039 | } |
5f5c8ee5 GM |
1040 | else |
1041 | c = *p; | |
1042 | ||
1043 | return CHAR_CHARSET (c); | |
1044 | } | |
1045 | ||
1046 | ||
1047 | \f | |
1048 | /*********************************************************************** | |
1049 | Lisp form evaluation | |
1050 | ***********************************************************************/ | |
1051 | ||
1052 | /* Error handler for eval_form. */ | |
1053 | ||
1054 | static Lisp_Object | |
1055 | eval_handler (arg) | |
1056 | Lisp_Object arg; | |
1057 | { | |
1058 | return Qnil; | |
1059 | } | |
1060 | ||
1061 | ||
1062 | /* Evaluate SEXPR and return the result, or nil if something went | |
1063 | wrong. */ | |
1064 | ||
1065 | static Lisp_Object | |
1066 | eval_form (sexpr) | |
1067 | Lisp_Object sexpr; | |
1068 | { | |
1069 | int count = specpdl_ptr - specpdl; | |
1070 | Lisp_Object val; | |
1071 | specbind (Qinhibit_redisplay, Qt); | |
1072 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
1073 | return unbind_to (count, val); | |
1074 | } | |
1075 | ||
1076 | ||
1077 | \f | |
1078 | /*********************************************************************** | |
1079 | Debugging | |
1080 | ***********************************************************************/ | |
1081 | ||
1082 | #if 0 | |
1083 | ||
1084 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1085 | This is for debugging. It is too slow to do unconditionally. */ | |
1086 | ||
1087 | static void | |
1088 | check_it (it) | |
1089 | struct it *it; | |
1090 | { | |
1091 | if (it->method == next_element_from_string) | |
a2889657 | 1092 | { |
5f5c8ee5 GM |
1093 | xassert (STRINGP (it->string)); |
1094 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1095 | } | |
1096 | else if (it->method == next_element_from_buffer) | |
1097 | { | |
1098 | /* Check that character and byte positions agree. */ | |
1099 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1100 | } | |
73af359d | 1101 | |
5f5c8ee5 GM |
1102 | if (it->dpvec) |
1103 | xassert (it->current.dpvec_index >= 0); | |
1104 | else | |
1105 | xassert (it->current.dpvec_index < 0); | |
1106 | } | |
1f40cad2 | 1107 | |
5f5c8ee5 GM |
1108 | #define CHECK_IT(IT) check_it ((IT)) |
1109 | ||
1110 | #else /* not 0 */ | |
1111 | ||
1112 | #define CHECK_IT(IT) (void) 0 | |
1113 | ||
1114 | #endif /* not 0 */ | |
1115 | ||
1116 | ||
1117 | #if GLYPH_DEBUG | |
1118 | ||
1119 | /* Check that the window end of window W is what we expect it | |
1120 | to be---the last row in the current matrix displaying text. */ | |
1121 | ||
1122 | static void | |
1123 | check_window_end (w) | |
1124 | struct window *w; | |
1125 | { | |
1126 | if (!MINI_WINDOW_P (w) | |
1127 | && !NILP (w->window_end_valid)) | |
1128 | { | |
1129 | struct glyph_row *row; | |
1130 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1131 | XFASTINT (w->window_end_vpos)), | |
1132 | !row->enabled_p | |
1133 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1134 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1139 | ||
1140 | #else /* not GLYPH_DEBUG */ | |
1141 | ||
1142 | #define CHECK_WINDOW_END(W) (void) 0 | |
1143 | ||
1144 | #endif /* not GLYPH_DEBUG */ | |
1145 | ||
1146 | ||
1147 | \f | |
1148 | /*********************************************************************** | |
1149 | Iterator initialization | |
1150 | ***********************************************************************/ | |
1151 | ||
1152 | /* Initialize IT for displaying current_buffer in window W, starting | |
1153 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1154 | position is specified which is useful when the iterator is assigned | |
1155 | a position later. BYTEPOS is the byte position corresponding to | |
1156 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1157 | ||
1158 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1159 | will produce glyphs in that row. | |
1160 | ||
1161 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1162 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
045dee35 | 1163 | HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for |
e037b9ec | 1164 | displaying the tool-bar. |
5f5c8ee5 GM |
1165 | |
1166 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
045dee35 | 1167 | HEADER_LINE_FACE_ID, the iterator will be initialized to use the |
5f5c8ee5 GM |
1168 | corresponding mode line glyph row of the desired matrix of W. */ |
1169 | ||
1170 | void | |
1171 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1172 | struct it *it; | |
1173 | struct window *w; | |
1174 | int charpos, bytepos; | |
1175 | struct glyph_row *row; | |
1176 | enum face_id base_face_id; | |
1177 | { | |
1178 | int highlight_region_p; | |
5f5c8ee5 GM |
1179 | |
1180 | /* Some precondition checks. */ | |
1181 | xassert (w != NULL && it != NULL); | |
5f5c8ee5 GM |
1182 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); |
1183 | ||
1184 | /* If face attributes have been changed since the last redisplay, | |
1185 | free realized faces now because they depend on face definitions | |
1186 | that might have changed. */ | |
1187 | if (face_change_count) | |
1188 | { | |
1189 | face_change_count = 0; | |
1190 | free_all_realized_faces (Qnil); | |
1191 | } | |
1192 | ||
1193 | /* Use one of the mode line rows of W's desired matrix if | |
1194 | appropriate. */ | |
1195 | if (row == NULL) | |
1196 | { | |
1197 | if (base_face_id == MODE_LINE_FACE_ID) | |
1198 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
045dee35 GM |
1199 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1200 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1201 | } |
1202 | ||
1203 | /* Clear IT. */ | |
1204 | bzero (it, sizeof *it); | |
1205 | it->current.overlay_string_index = -1; | |
1206 | it->current.dpvec_index = -1; | |
1207 | it->charset = CHARSET_ASCII; | |
1208 | it->base_face_id = base_face_id; | |
1209 | ||
1210 | /* The window in which we iterate over current_buffer: */ | |
1211 | XSETWINDOW (it->window, w); | |
1212 | it->w = w; | |
1213 | it->f = XFRAME (w->frame); | |
1214 | ||
1215 | /* If realized faces have been removed, e.g. because of face | |
1216 | attribute changes of named faces, recompute them. */ | |
1217 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1218 | recompute_basic_faces (it->f); | |
1219 | ||
5f5c8ee5 GM |
1220 | /* Current value of the `space-width', and 'height' properties. */ |
1221 | it->space_width = Qnil; | |
1222 | it->font_height = Qnil; | |
1223 | ||
1224 | /* Are control characters displayed as `^C'? */ | |
1225 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1226 | ||
1227 | /* -1 means everything between a CR and the following line end | |
1228 | is invisible. >0 means lines indented more than this value are | |
1229 | invisible. */ | |
1230 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1231 | ? XFASTINT (current_buffer->selective_display) | |
1232 | : (!NILP (current_buffer->selective_display) | |
1233 | ? -1 : 0)); | |
1234 | it->selective_display_ellipsis_p | |
1235 | = !NILP (current_buffer->selective_display_ellipses); | |
1236 | ||
1237 | /* Display table to use. */ | |
1238 | it->dp = window_display_table (w); | |
1239 | ||
1240 | /* Are multibyte characters enabled in current_buffer? */ | |
1241 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1242 | ||
1243 | /* Non-zero if we should highlight the region. */ | |
1244 | highlight_region_p | |
1245 | = (!NILP (Vtransient_mark_mode) | |
1246 | && !NILP (current_buffer->mark_active) | |
1247 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1248 | ||
1249 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1250 | start and end of a visible region in window IT->w. Set both to | |
1251 | -1 to indicate no region. */ | |
1252 | if (highlight_region_p | |
1253 | /* Maybe highlight only in selected window. */ | |
1254 | && (/* Either show region everywhere. */ | |
1255 | highlight_nonselected_windows | |
1256 | /* Or show region in the selected window. */ | |
1257 | || w == XWINDOW (selected_window) | |
1258 | /* Or show the region if we are in the mini-buffer and W is | |
1259 | the window the mini-buffer refers to. */ | |
1260 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1261 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1262 | { | |
1263 | int charpos = marker_position (current_buffer->mark); | |
1264 | it->region_beg_charpos = min (PT, charpos); | |
1265 | it->region_end_charpos = max (PT, charpos); | |
1266 | } | |
1267 | else | |
1268 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1269 | ||
1270 | /* Get the position at which the redisplay_end_trigger hook should | |
1271 | be run, if it is to be run at all. */ | |
1272 | if (MARKERP (w->redisplay_end_trigger) | |
1273 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1274 | it->redisplay_end_trigger_charpos | |
1275 | = marker_position (w->redisplay_end_trigger); | |
1276 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1277 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1278 | ||
1279 | /* Correct bogus values of tab_width. */ | |
1280 | it->tab_width = XINT (current_buffer->tab_width); | |
1281 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1282 | it->tab_width = 8; | |
1283 | ||
1284 | /* Are lines in the display truncated? */ | |
1285 | it->truncate_lines_p | |
1286 | = (base_face_id != DEFAULT_FACE_ID | |
1287 | || XINT (it->w->hscroll) | |
1288 | || (truncate_partial_width_windows | |
1289 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1290 | || !NILP (current_buffer->truncate_lines)); | |
1291 | ||
1292 | /* Get dimensions of truncation and continuation glyphs. These are | |
1293 | displayed as bitmaps under X, so we don't need them for such | |
1294 | frames. */ | |
1295 | if (!FRAME_WINDOW_P (it->f)) | |
1296 | { | |
1297 | if (it->truncate_lines_p) | |
1298 | { | |
1299 | /* We will need the truncation glyph. */ | |
1300 | xassert (it->glyph_row == NULL); | |
1301 | produce_special_glyphs (it, IT_TRUNCATION); | |
1302 | it->truncation_pixel_width = it->pixel_width; | |
1303 | } | |
1304 | else | |
1305 | { | |
1306 | /* We will need the continuation glyph. */ | |
1307 | xassert (it->glyph_row == NULL); | |
1308 | produce_special_glyphs (it, IT_CONTINUATION); | |
1309 | it->continuation_pixel_width = it->pixel_width; | |
1310 | } | |
1311 | ||
1312 | /* Reset these values to zero becaue the produce_special_glyphs | |
1313 | above has changed them. */ | |
1314 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1315 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1316 | } |
1317 | ||
1318 | /* Set this after getting the dimensions of truncation and | |
1319 | continuation glyphs, so that we don't produce glyphs when calling | |
1320 | produce_special_glyphs, above. */ | |
1321 | it->glyph_row = row; | |
1322 | it->area = TEXT_AREA; | |
1323 | ||
1324 | /* Get the dimensions of the display area. The display area | |
1325 | consists of the visible window area plus a horizontally scrolled | |
1326 | part to the left of the window. All x-values are relative to the | |
1327 | start of this total display area. */ | |
1328 | if (base_face_id != DEFAULT_FACE_ID) | |
1329 | { | |
1330 | /* Mode lines, menu bar in terminal frames. */ | |
1331 | it->first_visible_x = 0; | |
1332 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1333 | } | |
1334 | else | |
1335 | { | |
1336 | it->first_visible_x | |
1337 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1338 | it->last_visible_x = (it->first_visible_x | |
1339 | + window_box_width (w, TEXT_AREA)); | |
1340 | ||
1341 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1342 | the right margin. Otherwise, leave room for the continuation | |
1343 | glyph(s). Truncation and continuation glyphs are not inserted | |
1344 | for window-based redisplay. */ | |
1345 | if (!FRAME_WINDOW_P (it->f)) | |
1346 | { | |
1347 | if (it->truncate_lines_p) | |
1348 | it->last_visible_x -= it->truncation_pixel_width; | |
1349 | else | |
1350 | it->last_visible_x -= it->continuation_pixel_width; | |
1351 | } | |
1352 | ||
045dee35 GM |
1353 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1354 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1355 | } |
1356 | ||
1357 | /* Leave room for a border glyph. */ | |
1358 | if (!FRAME_WINDOW_P (it->f) | |
1359 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1360 | it->last_visible_x -= 1; | |
1361 | ||
1362 | it->last_visible_y = window_text_bottom_y (w); | |
1363 | ||
1364 | /* For mode lines and alike, arrange for the first glyph having a | |
1365 | left box line if the face specifies a box. */ | |
1366 | if (base_face_id != DEFAULT_FACE_ID) | |
1367 | { | |
1368 | struct face *face; | |
1369 | ||
1370 | it->face_id = base_face_id; | |
1371 | ||
1372 | /* If we have a boxed mode line, make the first character appear | |
1373 | with a left box line. */ | |
1374 | face = FACE_FROM_ID (it->f, base_face_id); | |
1375 | if (face->box != FACE_NO_BOX) | |
1376 | it->start_of_box_run_p = 1; | |
1377 | } | |
1378 | ||
1379 | /* If a buffer position was specified, set the iterator there, | |
1380 | getting overlays and face properties from that position. */ | |
1381 | if (charpos > 0) | |
1382 | { | |
1383 | it->end_charpos = ZV; | |
1384 | it->face_id = -1; | |
1385 | IT_CHARPOS (*it) = charpos; | |
1386 | ||
1387 | /* Compute byte position if not specified. */ | |
1388 | if (bytepos <= 0) | |
1389 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1390 | else | |
1391 | IT_BYTEPOS (*it) = bytepos; | |
1392 | ||
1393 | /* Compute faces etc. */ | |
1394 | reseat (it, it->current.pos, 1); | |
1395 | } | |
1396 | ||
1397 | CHECK_IT (it); | |
1398 | } | |
1399 | ||
1400 | ||
1401 | /* Initialize IT for the display of window W with window start POS. */ | |
1402 | ||
1403 | void | |
1404 | start_display (it, w, pos) | |
1405 | struct it *it; | |
1406 | struct window *w; | |
1407 | struct text_pos pos; | |
1408 | { | |
1409 | int start_at_line_beg_p; | |
1410 | struct glyph_row *row; | |
045dee35 | 1411 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1412 | int first_y; |
1413 | ||
1414 | row = w->desired_matrix->rows + first_vpos; | |
1415 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1416 | first_y = it->current_y; | |
1417 | ||
1418 | /* If window start is not at a line start, move back to the line | |
1419 | start. This makes sure that we take continuation lines into | |
1420 | account. */ | |
1421 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1422 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1423 | if (!start_at_line_beg_p) | |
1424 | reseat_at_previous_visible_line_start (it); | |
1425 | ||
5f5c8ee5 GM |
1426 | /* If window start is not at a line start, skip forward to POS to |
1427 | get the correct continuation_lines_width and current_x. */ | |
1428 | if (!start_at_line_beg_p) | |
1429 | { | |
1430 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1431 | ||
1432 | /* If lines are continued, this line may end in the middle of a | |
1433 | multi-glyph character (e.g. a control character displayed as | |
1434 | \003, or in the middle of an overlay string). In this case | |
1435 | move_it_to above will not have taken us to the start of | |
1436 | the continuation line but to the end of the continued line. */ | |
1437 | if (!it->truncate_lines_p && it->current_x > 0) | |
1438 | { | |
1439 | if (it->current.dpvec_index >= 0 | |
1440 | || it->current.overlay_string_index >= 0) | |
1441 | { | |
1442 | set_iterator_to_next (it); | |
1443 | move_it_in_display_line_to (it, -1, -1, 0); | |
1444 | } | |
1445 | it->continuation_lines_width += it->current_x; | |
1446 | } | |
1447 | ||
1448 | it->current_y = first_y; | |
1449 | it->vpos = 0; | |
1450 | it->current_x = it->hpos = 0; | |
1451 | } | |
1452 | ||
1453 | #if 0 /* Don't assert the following because start_display is sometimes | |
1454 | called intentionally with a window start that is not at a | |
1455 | line start. Please leave this code in as a comment. */ | |
1456 | ||
1457 | /* Window start should be on a line start, now. */ | |
1458 | xassert (it->continuation_lines_width | |
1459 | || IT_CHARPOS (it) == BEGV | |
1460 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1461 | #endif /* 0 */ | |
1462 | } | |
1463 | ||
1464 | ||
1465 | /* Initialize IT for stepping through current_buffer in window W, | |
1466 | starting at position POS that includes overlay string and display | |
1467 | vector/ control character translation position information. */ | |
1468 | ||
1469 | static void | |
1470 | init_from_display_pos (it, w, pos) | |
1471 | struct it *it; | |
1472 | struct window *w; | |
1473 | struct display_pos *pos; | |
1474 | { | |
1475 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1476 | text, so we might end up at a position different from POS. This | |
1477 | is only a problem when POS is a row start after a newline and an | |
1478 | overlay starts there with an after-string, and the overlay has an | |
1479 | invisible property. Since we don't skip invisible text in | |
1480 | display_line and elsewhere immediately after consuming the | |
1481 | newline before the row start, such a POS will not be in a string, | |
1482 | but the call to init_iterator below will move us to the | |
1483 | after-string. */ | |
1484 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1485 | NULL, DEFAULT_FACE_ID); | |
1486 | ||
1487 | /* If position is within an overlay string, set up IT to | |
1488 | the right overlay string. */ | |
1489 | if (pos->overlay_string_index >= 0) | |
1490 | { | |
1491 | int relative_index; | |
1492 | ||
1493 | /* We already have the first chunk of overlay strings in | |
1494 | IT->overlay_strings. Load more until the one for | |
1495 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1496 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1497 | { | |
1498 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1499 | it->current.overlay_string_index = 0; | |
1500 | while (n--) | |
1501 | { | |
1502 | load_overlay_strings (it); | |
1503 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | it->current.overlay_string_index = pos->overlay_string_index; | |
1508 | relative_index = (it->current.overlay_string_index | |
1509 | % OVERLAY_STRING_CHUNK_SIZE); | |
1510 | it->string = it->overlay_strings[relative_index]; | |
1511 | it->current.string_pos = pos->string_pos; | |
1512 | it->method = next_element_from_string; | |
1513 | } | |
1514 | else if (CHARPOS (pos->string_pos) >= 0) | |
1515 | { | |
1516 | /* Recorded position is not in an overlay string, but in another | |
1517 | string. This can only be a string from a `display' property. | |
1518 | IT should already be filled with that string. */ | |
1519 | it->current.string_pos = pos->string_pos; | |
1520 | xassert (STRINGP (it->string)); | |
1521 | } | |
1522 | ||
1523 | /* Restore position in display vector translations or control | |
1524 | character translations. */ | |
1525 | if (pos->dpvec_index >= 0) | |
1526 | { | |
1527 | /* This fills IT->dpvec. */ | |
1528 | get_next_display_element (it); | |
1529 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1530 | it->current.dpvec_index = pos->dpvec_index; | |
1531 | } | |
1532 | ||
1533 | CHECK_IT (it); | |
1534 | } | |
1535 | ||
1536 | ||
1537 | /* Initialize IT for stepping through current_buffer in window W | |
1538 | starting at ROW->start. */ | |
1539 | ||
1540 | static void | |
1541 | init_to_row_start (it, w, row) | |
1542 | struct it *it; | |
1543 | struct window *w; | |
1544 | struct glyph_row *row; | |
1545 | { | |
1546 | init_from_display_pos (it, w, &row->start); | |
1547 | it->continuation_lines_width = row->continuation_lines_width; | |
1548 | CHECK_IT (it); | |
1549 | } | |
1550 | ||
1551 | ||
1552 | /* Initialize IT for stepping through current_buffer in window W | |
1553 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1554 | ||
1555 | static void | |
1556 | init_to_row_end (it, w, row) | |
1557 | struct it *it; | |
1558 | struct window *w; | |
1559 | struct glyph_row *row; | |
1560 | { | |
1561 | init_from_display_pos (it, w, &row->end); | |
1562 | ||
1563 | if (row->continued_p) | |
1564 | it->continuation_lines_width = (row->continuation_lines_width | |
1565 | + row->pixel_width); | |
1566 | CHECK_IT (it); | |
1567 | } | |
1568 | ||
1569 | ||
1570 | ||
1571 | \f | |
1572 | /*********************************************************************** | |
1573 | Text properties | |
1574 | ***********************************************************************/ | |
1575 | ||
1576 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1577 | overlay changes. Set IT->stop_charpos to the next position where | |
1578 | to stop. */ | |
1579 | ||
1580 | static void | |
1581 | handle_stop (it) | |
1582 | struct it *it; | |
1583 | { | |
1584 | enum prop_handled handled; | |
1585 | int handle_overlay_change_p = 1; | |
1586 | struct props *p; | |
1587 | ||
1588 | it->dpvec = NULL; | |
1589 | it->current.dpvec_index = -1; | |
1590 | ||
1591 | do | |
1592 | { | |
1593 | handled = HANDLED_NORMALLY; | |
1594 | ||
1595 | /* Call text property handlers. */ | |
1596 | for (p = it_props; p->handler; ++p) | |
1597 | { | |
1598 | handled = p->handler (it); | |
1599 | ||
1600 | if (handled == HANDLED_RECOMPUTE_PROPS) | |
1601 | break; | |
1602 | else if (handled == HANDLED_RETURN) | |
1603 | return; | |
1604 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1605 | handle_overlay_change_p = 0; | |
1606 | } | |
1607 | ||
1608 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1609 | { | |
1610 | /* Don't check for overlay strings below when set to deliver | |
1611 | characters from a display vector. */ | |
1612 | if (it->method == next_element_from_display_vector) | |
1613 | handle_overlay_change_p = 0; | |
1614 | ||
1615 | /* Handle overlay changes. */ | |
1616 | if (handle_overlay_change_p) | |
1617 | handled = handle_overlay_change (it); | |
1618 | ||
1619 | /* Determine where to stop next. */ | |
1620 | if (handled == HANDLED_NORMALLY) | |
1621 | compute_stop_pos (it); | |
1622 | } | |
1623 | } | |
1624 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1625 | } | |
1626 | ||
1627 | ||
1628 | /* Compute IT->stop_charpos from text property and overlay change | |
1629 | information for IT's current position. */ | |
1630 | ||
1631 | static void | |
1632 | compute_stop_pos (it) | |
1633 | struct it *it; | |
1634 | { | |
1635 | register INTERVAL iv, next_iv; | |
1636 | Lisp_Object object, limit, position; | |
1637 | ||
1638 | /* If nowhere else, stop at the end. */ | |
1639 | it->stop_charpos = it->end_charpos; | |
1640 | ||
1641 | if (STRINGP (it->string)) | |
1642 | { | |
1643 | /* Strings are usually short, so don't limit the search for | |
1644 | properties. */ | |
1645 | object = it->string; | |
1646 | limit = Qnil; | |
1647 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1648 | } | |
1649 | else | |
1650 | { | |
1651 | int charpos; | |
1652 | ||
1653 | /* If next overlay change is in front of the current stop pos | |
1654 | (which is IT->end_charpos), stop there. Note: value of | |
1655 | next_overlay_change is point-max if no overlay change | |
1656 | follows. */ | |
1657 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1658 | if (charpos < it->stop_charpos) | |
1659 | it->stop_charpos = charpos; | |
1660 | ||
1661 | /* If showing the region, we have to stop at the region | |
1662 | start or end because the face might change there. */ | |
1663 | if (it->region_beg_charpos > 0) | |
1664 | { | |
1665 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1666 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1667 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1668 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1669 | } | |
1670 | ||
1671 | /* Set up variables for computing the stop position from text | |
1672 | property changes. */ | |
1673 | XSETBUFFER (object, current_buffer); | |
1674 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1675 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1676 | ||
1677 | } | |
1678 | ||
1679 | /* Get the interval containing IT's position. Value is a null | |
1680 | interval if there isn't such an interval. */ | |
1681 | iv = validate_interval_range (object, &position, &position, 0); | |
1682 | if (!NULL_INTERVAL_P (iv)) | |
1683 | { | |
1684 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1685 | struct props *p; | |
1686 | ||
1687 | /* Get properties here. */ | |
1688 | for (p = it_props; p->handler; ++p) | |
1689 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1690 | ||
1691 | /* Look for an interval following iv that has different | |
1692 | properties. */ | |
1693 | for (next_iv = next_interval (iv); | |
1694 | (!NULL_INTERVAL_P (next_iv) | |
1695 | && (NILP (limit) | |
1696 | || XFASTINT (limit) > next_iv->position)); | |
1697 | next_iv = next_interval (next_iv)) | |
1698 | { | |
1699 | for (p = it_props; p->handler; ++p) | |
1700 | { | |
1701 | Lisp_Object new_value; | |
1702 | ||
1703 | new_value = textget (next_iv->plist, *p->name); | |
1704 | if (!EQ (values_here[p->idx], new_value)) | |
1705 | break; | |
1706 | } | |
1707 | ||
1708 | if (p->handler) | |
1709 | break; | |
1710 | } | |
1711 | ||
1712 | if (!NULL_INTERVAL_P (next_iv)) | |
1713 | { | |
1714 | if (INTEGERP (limit) | |
1715 | && next_iv->position >= XFASTINT (limit)) | |
1716 | /* No text property change up to limit. */ | |
1717 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1718 | else | |
1719 | /* Text properties change in next_iv. */ | |
1720 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | xassert (STRINGP (it->string) | |
1725 | || (it->stop_charpos >= BEGV | |
1726 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1727 | } | |
1728 | ||
1729 | ||
1730 | /* Return the position of the next overlay change after POS in | |
1731 | current_buffer. Value is point-max if no overlay change | |
1732 | follows. This is like `next-overlay-change' but doesn't use | |
1733 | xmalloc. */ | |
1734 | ||
1735 | static int | |
1736 | next_overlay_change (pos) | |
1737 | int pos; | |
1738 | { | |
1739 | int noverlays; | |
1740 | int endpos; | |
1741 | Lisp_Object *overlays; | |
1742 | int len; | |
1743 | int i; | |
1744 | ||
1745 | /* Get all overlays at the given position. */ | |
1746 | len = 10; | |
1747 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1748 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1749 | if (noverlays > len) | |
1750 | { | |
1751 | len = noverlays; | |
1752 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1753 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1754 | } | |
1755 | ||
1756 | /* If any of these overlays ends before endpos, | |
1757 | use its ending point instead. */ | |
1758 | for (i = 0; i < noverlays; ++i) | |
1759 | { | |
1760 | Lisp_Object oend; | |
1761 | int oendpos; | |
1762 | ||
1763 | oend = OVERLAY_END (overlays[i]); | |
1764 | oendpos = OVERLAY_POSITION (oend); | |
1765 | endpos = min (endpos, oendpos); | |
1766 | } | |
1767 | ||
1768 | return endpos; | |
1769 | } | |
1770 | ||
1771 | ||
1772 | \f | |
1773 | /*********************************************************************** | |
1774 | Fontification | |
1775 | ***********************************************************************/ | |
1776 | ||
1777 | /* Handle changes in the `fontified' property of the current buffer by | |
1778 | calling hook functions from Qfontification_functions to fontify | |
1779 | regions of text. */ | |
1780 | ||
1781 | static enum prop_handled | |
1782 | handle_fontified_prop (it) | |
1783 | struct it *it; | |
1784 | { | |
1785 | Lisp_Object prop, pos; | |
1786 | enum prop_handled handled = HANDLED_NORMALLY; | |
1787 | ||
1788 | /* Get the value of the `fontified' property at IT's current buffer | |
1789 | position. (The `fontified' property doesn't have a special | |
1790 | meaning in strings.) If the value is nil, call functions from | |
1791 | Qfontification_functions. */ | |
1792 | if (!STRINGP (it->string) | |
1793 | && it->s == NULL | |
1794 | && !NILP (Vfontification_functions) | |
1795 | && (pos = make_number (IT_CHARPOS (*it)), | |
1796 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1797 | NILP (prop))) | |
1798 | { | |
1799 | Lisp_Object args[2]; | |
1800 | ||
1801 | /* Run the hook functions. */ | |
1802 | args[0] = Qfontification_functions; | |
1803 | args[1] = pos; | |
1804 | Frun_hook_with_args (make_number (2), args); | |
1805 | ||
1806 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1807 | something. This avoids an endless loop if they failed to | |
1808 | fontify the text for which reason ever. */ | |
1809 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1810 | handled = HANDLED_RECOMPUTE_PROPS; | |
1811 | } | |
1812 | ||
1813 | return handled; | |
1814 | } | |
1815 | ||
1816 | ||
1817 | \f | |
1818 | /*********************************************************************** | |
1819 | Faces | |
1820 | ***********************************************************************/ | |
1821 | ||
1822 | /* Set up iterator IT from face properties at its current position. | |
1823 | Called from handle_stop. */ | |
1824 | ||
1825 | static enum prop_handled | |
1826 | handle_face_prop (it) | |
1827 | struct it *it; | |
1828 | { | |
1829 | int new_face_id, next_stop; | |
1830 | ||
1831 | if (!STRINGP (it->string)) | |
1832 | { | |
1833 | new_face_id | |
1834 | = face_at_buffer_position (it->w, | |
1835 | IT_CHARPOS (*it), | |
1836 | it->region_beg_charpos, | |
1837 | it->region_end_charpos, | |
1838 | &next_stop, | |
1839 | (IT_CHARPOS (*it) | |
1840 | + TEXT_PROP_DISTANCE_LIMIT), | |
1841 | 0); | |
1842 | ||
1843 | /* Is this a start of a run of characters with box face? | |
1844 | Caveat: this can be called for a freshly initialized | |
1845 | iterator; face_id is -1 is this case. We know that the new | |
1846 | face will not change until limit, i.e. if the new face has a | |
1847 | box, all characters up to limit will have one. But, as | |
1848 | usual, we don't know whether limit is really the end. */ | |
1849 | if (new_face_id != it->face_id) | |
1850 | { | |
1851 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1852 | ||
1853 | /* If new face has a box but old face has not, this is | |
1854 | the start of a run of characters with box, i.e. it has | |
1855 | a shadow on the left side. The value of face_id of the | |
1856 | iterator will be -1 if this is the initial call that gets | |
1857 | the face. In this case, we have to look in front of IT's | |
1858 | position and see whether there is a face != new_face_id. */ | |
1859 | it->start_of_box_run_p | |
1860 | = (new_face->box != FACE_NO_BOX | |
1861 | && (it->face_id >= 0 | |
1862 | || IT_CHARPOS (*it) == BEG | |
1863 | || new_face_id != face_before_it_pos (it))); | |
1864 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1865 | } | |
1866 | } | |
1867 | else | |
1868 | { | |
1869 | new_face_id | |
1870 | = face_at_string_position (it->w, | |
1871 | it->string, | |
1872 | IT_STRING_CHARPOS (*it), | |
1873 | (it->current.overlay_string_index >= 0 | |
1874 | ? IT_CHARPOS (*it) | |
1875 | : 0), | |
1876 | it->region_beg_charpos, | |
1877 | it->region_end_charpos, | |
1878 | &next_stop, | |
1879 | it->base_face_id); | |
1880 | ||
1881 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
1882 | /* If IT is used to display a mode line we would really like to | |
1883 | use the mode line face instead of the frame's default face. */ | |
1884 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
1885 | && new_face_id == DEFAULT_FACE_ID) | |
1886 | new_face_id = MODE_LINE_FACE_ID; | |
1887 | #endif | |
1888 | ||
1889 | /* Is this a start of a run of characters with box? Caveat: | |
1890 | this can be called for a freshly allocated iterator; face_id | |
1891 | is -1 is this case. We know that the new face will not | |
1892 | change until the next check pos, i.e. if the new face has a | |
1893 | box, all characters up to that position will have a | |
1894 | box. But, as usual, we don't know whether that position | |
1895 | is really the end. */ | |
1896 | if (new_face_id != it->face_id) | |
1897 | { | |
1898 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1899 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
1900 | ||
1901 | /* If new face has a box but old face hasn't, this is the | |
1902 | start of a run of characters with box, i.e. it has a | |
1903 | shadow on the left side. */ | |
1904 | it->start_of_box_run_p | |
1905 | = new_face->box && (old_face == NULL || !old_face->box); | |
1906 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | it->face_id = new_face_id; | |
1911 | it->charset = CHARSET_ASCII; | |
1912 | return HANDLED_NORMALLY; | |
1913 | } | |
1914 | ||
1915 | ||
1916 | /* Compute the face one character before or after the current position | |
1917 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
1918 | position. Value is the id of the face. */ | |
1919 | ||
1920 | static int | |
1921 | face_before_or_after_it_pos (it, before_p) | |
1922 | struct it *it; | |
1923 | int before_p; | |
1924 | { | |
1925 | int face_id, limit; | |
1926 | int next_check_charpos; | |
1927 | struct text_pos pos; | |
1928 | ||
1929 | xassert (it->s == NULL); | |
1930 | ||
1931 | if (STRINGP (it->string)) | |
1932 | { | |
1933 | /* No face change past the end of the string (for the case | |
1934 | we are padding with spaces). No face change before the | |
1935 | string start. */ | |
1936 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
1937 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
1938 | return it->face_id; | |
1939 | ||
1940 | /* Set pos to the position before or after IT's current position. */ | |
1941 | if (before_p) | |
1942 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
1943 | else | |
1944 | pos = string_pos (IT_STRING_CHARPOS (*it) + 1, it->string); | |
1945 | ||
1946 | /* Get the face for ASCII, or unibyte. */ | |
1947 | face_id | |
1948 | = face_at_string_position (it->w, | |
1949 | it->string, | |
1950 | CHARPOS (pos), | |
1951 | (it->current.overlay_string_index >= 0 | |
1952 | ? IT_CHARPOS (*it) | |
1953 | : 0), | |
1954 | it->region_beg_charpos, | |
1955 | it->region_end_charpos, | |
1956 | &next_check_charpos, | |
1957 | it->base_face_id); | |
1958 | ||
1959 | /* Correct the face for charsets different from ASCII. Do it | |
1960 | for the multibyte case only. The face returned above is | |
1961 | suitable for unibyte text if IT->string is unibyte. */ | |
1962 | if (STRING_MULTIBYTE (it->string)) | |
1963 | { | |
1964 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
1965 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
1966 | int c, len, charset; | |
1967 | ||
4fdb80f2 | 1968 | c = string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1969 | charset = CHAR_CHARSET (c); |
1970 | if (charset != CHARSET_ASCII) | |
1971 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
1972 | } | |
1973 | } | |
1974 | else | |
1975 | { | |
70851746 GM |
1976 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
1977 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
1978 | return it->face_id; | |
1979 | ||
5f5c8ee5 GM |
1980 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
1981 | pos = it->current.pos; | |
1982 | ||
1983 | if (before_p) | |
1984 | DEC_TEXT_POS (pos); | |
1985 | else | |
1986 | INC_TEXT_POS (pos); | |
70851746 | 1987 | |
5f5c8ee5 GM |
1988 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
1989 | face_id = face_at_buffer_position (it->w, | |
1990 | CHARPOS (pos), | |
1991 | it->region_beg_charpos, | |
1992 | it->region_end_charpos, | |
1993 | &next_check_charpos, | |
1994 | limit, 0); | |
1995 | ||
1996 | /* Correct the face for charsets different from ASCII. Do it | |
1997 | for the multibyte case only. The face returned above is | |
1998 | suitable for unibyte text if current_buffer is unibyte. */ | |
1999 | if (it->multibyte_p) | |
2000 | { | |
2001 | int charset = charset_at_position (pos); | |
2002 | if (charset != CHARSET_ASCII) | |
2003 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | return face_id; | |
2008 | } | |
2009 | ||
2010 | ||
2011 | \f | |
2012 | /*********************************************************************** | |
2013 | Invisible text | |
2014 | ***********************************************************************/ | |
2015 | ||
2016 | /* Set up iterator IT from invisible properties at its current | |
2017 | position. Called from handle_stop. */ | |
2018 | ||
2019 | static enum prop_handled | |
2020 | handle_invisible_prop (it) | |
2021 | struct it *it; | |
2022 | { | |
2023 | enum prop_handled handled = HANDLED_NORMALLY; | |
2024 | ||
2025 | if (STRINGP (it->string)) | |
2026 | { | |
2027 | extern Lisp_Object Qinvisible; | |
2028 | Lisp_Object prop, end_charpos, limit, charpos; | |
2029 | ||
2030 | /* Get the value of the invisible text property at the | |
2031 | current position. Value will be nil if there is no such | |
2032 | property. */ | |
2033 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2034 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2035 | ||
2036 | if (!NILP (prop)) | |
2037 | { | |
2038 | handled = HANDLED_RECOMPUTE_PROPS; | |
2039 | ||
2040 | /* Get the position at which the next change of the | |
2041 | invisible text property can be found in IT->string. | |
2042 | Value will be nil if the property value is the same for | |
2043 | all the rest of IT->string. */ | |
2044 | XSETINT (limit, XSTRING (it->string)->size); | |
2045 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2046 | it->string, limit); | |
2047 | ||
2048 | /* Text at current position is invisible. The next | |
2049 | change in the property is at position end_charpos. | |
2050 | Move IT's current position to that position. */ | |
2051 | if (INTEGERP (end_charpos) | |
2052 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2053 | { | |
2054 | struct text_pos old; | |
2055 | old = it->current.string_pos; | |
2056 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2057 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2058 | } | |
2059 | else | |
2060 | { | |
2061 | /* The rest of the string is invisible. If this is an | |
2062 | overlay string, proceed with the next overlay string | |
2063 | or whatever comes and return a character from there. */ | |
2064 | if (it->current.overlay_string_index >= 0) | |
2065 | { | |
2066 | next_overlay_string (it); | |
2067 | /* Don't check for overlay strings when we just | |
2068 | finished processing them. */ | |
2069 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2070 | } | |
2071 | else | |
2072 | { | |
2073 | struct Lisp_String *s = XSTRING (it->string); | |
2074 | IT_STRING_CHARPOS (*it) = s->size; | |
2075 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2076 | } | |
2077 | } | |
2078 | } | |
2079 | } | |
2080 | else | |
2081 | { | |
2082 | int visible_p, newpos, next_stop; | |
2083 | Lisp_Object pos, prop; | |
2084 | ||
2085 | /* First of all, is there invisible text at this position? */ | |
2086 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2087 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2088 | ||
2089 | /* If we are on invisible text, skip over it. */ | |
2090 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2091 | { | |
2092 | /* Record whether we have to display an ellipsis for the | |
2093 | invisible text. */ | |
2094 | int display_ellipsis_p | |
2095 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2096 | ||
2097 | handled = HANDLED_RECOMPUTE_PROPS; | |
2098 | ||
2099 | /* Loop skipping over invisible text. The loop is left at | |
2100 | ZV or with IT on the first char being visible again. */ | |
2101 | do | |
2102 | { | |
2103 | /* Try to skip some invisible text. Return value is the | |
2104 | position reached which can be equal to IT's position | |
2105 | if there is nothing invisible here. This skips both | |
2106 | over invisible text properties and overlays with | |
2107 | invisible property. */ | |
2108 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2109 | &next_stop, ZV, it->window); | |
2110 | ||
2111 | /* If we skipped nothing at all we weren't at invisible | |
2112 | text in the first place. If everything to the end of | |
2113 | the buffer was skipped, end the loop. */ | |
2114 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2115 | visible_p = 1; | |
2116 | else | |
2117 | { | |
2118 | /* We skipped some characters but not necessarily | |
2119 | all there are. Check if we ended up on visible | |
2120 | text. Fget_char_property returns the property of | |
2121 | the char before the given position, i.e. if we | |
2122 | get visible_p = 1, this means that the char at | |
2123 | newpos is visible. */ | |
2124 | XSETFASTINT (pos, newpos); | |
2125 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2126 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2127 | } | |
2128 | ||
2129 | /* If we ended up on invisible text, proceed to | |
2130 | skip starting with next_stop. */ | |
2131 | if (!visible_p) | |
2132 | IT_CHARPOS (*it) = next_stop; | |
2133 | } | |
2134 | while (!visible_p); | |
2135 | ||
2136 | /* The position newpos is now either ZV or on visible text. */ | |
2137 | IT_CHARPOS (*it) = newpos; | |
2138 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2139 | ||
2140 | /* Maybe return `...' next for the end of the invisible text. */ | |
2141 | if (display_ellipsis_p) | |
2142 | { | |
2143 | if (it->dp | |
2144 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2145 | { | |
2146 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2147 | it->dpvec = v->contents; | |
2148 | it->dpend = v->contents + v->size; | |
2149 | } | |
2150 | else | |
2151 | { | |
2152 | /* Default `...'. */ | |
2153 | it->dpvec = default_invis_vector; | |
2154 | it->dpend = default_invis_vector + 3; | |
2155 | } | |
2156 | ||
2157 | /* The ellipsis display does not replace the display of | |
2158 | the character at the new position. Indicate this by | |
2159 | setting IT->dpvec_char_len to zero. */ | |
2160 | it->dpvec_char_len = 0; | |
2161 | ||
2162 | it->current.dpvec_index = 0; | |
2163 | it->method = next_element_from_display_vector; | |
2164 | } | |
2165 | } | |
2166 | } | |
2167 | ||
2168 | return handled; | |
2169 | } | |
2170 | ||
2171 | ||
2172 | \f | |
2173 | /*********************************************************************** | |
2174 | 'display' property | |
2175 | ***********************************************************************/ | |
2176 | ||
2177 | /* Set up iterator IT from `display' property at its current position. | |
2178 | Called from handle_stop. */ | |
2179 | ||
2180 | static enum prop_handled | |
2181 | handle_display_prop (it) | |
2182 | struct it *it; | |
2183 | { | |
2184 | Lisp_Object prop, object; | |
2185 | struct text_pos *position; | |
2186 | int space_or_image_found_p; | |
2187 | ||
2188 | if (STRINGP (it->string)) | |
2189 | { | |
2190 | object = it->string; | |
2191 | position = &it->current.string_pos; | |
2192 | } | |
2193 | else | |
2194 | { | |
2195 | object = Qnil; | |
2196 | position = &it->current.pos; | |
2197 | } | |
2198 | ||
2199 | /* Reset those iterator values set from display property values. */ | |
2200 | it->font_height = Qnil; | |
2201 | it->space_width = Qnil; | |
2202 | it->voffset = 0; | |
2203 | ||
2204 | /* We don't support recursive `display' properties, i.e. string | |
2205 | values that have a string `display' property, that have a string | |
2206 | `display' property etc. */ | |
2207 | if (!it->string_from_display_prop_p) | |
2208 | it->area = TEXT_AREA; | |
2209 | ||
2210 | prop = Fget_char_property (make_number (position->charpos), | |
2211 | Qdisplay, object); | |
2212 | if (NILP (prop)) | |
2213 | return HANDLED_NORMALLY; | |
2214 | ||
2215 | space_or_image_found_p = 0; | |
f3751a65 GM |
2216 | if (CONSP (prop) |
2217 | && CONSP (XCAR (prop)) | |
2218 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
5f5c8ee5 | 2219 | { |
f3751a65 | 2220 | /* A list of sub-properties. */ |
5f5c8ee5 GM |
2221 | while (CONSP (prop)) |
2222 | { | |
2223 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2224 | space_or_image_found_p = 1; | |
2225 | prop = XCDR (prop); | |
2226 | } | |
2227 | } | |
2228 | else if (VECTORP (prop)) | |
2229 | { | |
2230 | int i; | |
2231 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2232 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2233 | object, position)) | |
2234 | space_or_image_found_p = 1; | |
2235 | } | |
2236 | else | |
2237 | { | |
2238 | if (handle_single_display_prop (it, prop, object, position)) | |
2239 | space_or_image_found_p = 1; | |
2240 | } | |
2241 | ||
2242 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2243 | } | |
2244 | ||
2245 | ||
6c577098 | 2246 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2247 | at START_POS in OBJECT. */ |
2248 | ||
2249 | static struct text_pos | |
2250 | display_prop_end (it, object, start_pos) | |
2251 | struct it *it; | |
2252 | Lisp_Object object; | |
2253 | struct text_pos start_pos; | |
2254 | { | |
2255 | Lisp_Object end; | |
2256 | struct text_pos end_pos; | |
5f5c8ee5 | 2257 | |
6c577098 GM |
2258 | end = next_single_char_property_change (make_number (CHARPOS (start_pos)), |
2259 | Qdisplay, object, Qnil); | |
2260 | CHARPOS (end_pos) = XFASTINT (end); | |
2261 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2262 | compute_string_pos (&end_pos, start_pos, it->string); |
2263 | else | |
6c577098 | 2264 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2265 | |
2266 | return end_pos; | |
2267 | } | |
2268 | ||
2269 | ||
2270 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2271 | is the object in which the `display' property was found. *POSITION | |
2272 | is the position at which it was found. | |
2273 | ||
2274 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2275 | end position of the `display' property. | |
2276 | ||
2277 | Value is non-zero if a `space' or `image' property value was found. */ | |
2278 | ||
2279 | static int | |
2280 | handle_single_display_prop (it, prop, object, position) | |
2281 | struct it *it; | |
2282 | Lisp_Object prop; | |
2283 | Lisp_Object object; | |
2284 | struct text_pos *position; | |
2285 | { | |
2286 | Lisp_Object value; | |
2287 | int space_or_image_found_p = 0; | |
2288 | ||
2289 | Lisp_Object form; | |
2290 | ||
d3acf96b | 2291 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
5a4c88c4 | 2292 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2293 | form = Qt; |
d3acf96b | 2294 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2295 | { |
2296 | prop = XCDR (prop); | |
2297 | if (!CONSP (prop)) | |
2298 | return 0; | |
2299 | form = XCAR (prop); | |
2300 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2301 | } |
2302 | ||
2303 | if (!NILP (form) && !EQ (form, Qt)) | |
2304 | { | |
2305 | struct gcpro gcpro1; | |
2306 | struct text_pos end_pos, pt; | |
2307 | ||
2308 | end_pos = display_prop_end (it, object, *position); | |
2309 | GCPRO1 (form); | |
2310 | ||
2311 | /* Temporarily set point to the end position, and then evaluate | |
2312 | the form. This makes `(eolp)' work as FORM. */ | |
2313 | CHARPOS (pt) = PT; | |
2314 | BYTEPOS (pt) = PT_BYTE; | |
2315 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2316 | form = eval_form (form); | |
2317 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
2318 | UNGCPRO; | |
2319 | } | |
2320 | ||
2321 | if (NILP (form)) | |
2322 | return 0; | |
2323 | ||
2324 | if (CONSP (prop) | |
2325 | && EQ (XCAR (prop), Qheight) | |
2326 | && CONSP (XCDR (prop))) | |
2327 | { | |
2328 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2329 | return 0; | |
2330 | ||
2331 | /* `(height HEIGHT)'. */ | |
2332 | it->font_height = XCAR (XCDR (prop)); | |
2333 | if (!NILP (it->font_height)) | |
2334 | { | |
2335 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2336 | int new_height = -1; | |
2337 | ||
2338 | if (CONSP (it->font_height) | |
2339 | && (EQ (XCAR (it->font_height), Qplus) | |
2340 | || EQ (XCAR (it->font_height), Qminus)) | |
2341 | && CONSP (XCDR (it->font_height)) | |
2342 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2343 | { | |
2344 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2345 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2346 | if (EQ (XCAR (it->font_height), Qplus)) | |
2347 | steps = - steps; | |
2348 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2349 | } | |
2350 | else if (SYMBOLP (it->font_height)) | |
2351 | { | |
2352 | /* Call function with current height as argument. | |
2353 | Value is the new height. */ | |
2354 | Lisp_Object form, height; | |
2355 | struct gcpro gcpro1; | |
2356 | ||
2357 | height = face->lface[LFACE_HEIGHT_INDEX]; | |
2358 | form = Fcons (it->font_height, Fcons (height, Qnil)); | |
2359 | GCPRO1 (form); | |
2360 | height = eval_form (form); | |
2361 | if (NUMBERP (height)) | |
2362 | new_height = XFLOATINT (height); | |
2363 | UNGCPRO; | |
2364 | } | |
2365 | else if (NUMBERP (it->font_height)) | |
2366 | { | |
2367 | /* Value is a multiple of the canonical char height. */ | |
2368 | struct face *face; | |
2369 | ||
2370 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2371 | new_height = (XFLOATINT (it->font_height) | |
2372 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2373 | } | |
2374 | else | |
2375 | { | |
2376 | /* Evaluate IT->font_height with `height' bound to the | |
2377 | current specified height to get the new height. */ | |
2378 | Lisp_Object value; | |
2379 | int count = specpdl_ptr - specpdl; | |
2380 | ||
2381 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2382 | value = eval_form (it->font_height); | |
2383 | unbind_to (count, Qnil); | |
2384 | ||
2385 | if (NUMBERP (value)) | |
2386 | new_height = XFLOATINT (value); | |
2387 | } | |
2388 | ||
2389 | if (new_height > 0) | |
2390 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2391 | } | |
2392 | } | |
2393 | else if (CONSP (prop) | |
2394 | && EQ (XCAR (prop), Qspace_width) | |
2395 | && CONSP (XCDR (prop))) | |
2396 | { | |
2397 | /* `(space_width WIDTH)'. */ | |
2398 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2399 | return 0; | |
2400 | ||
2401 | value = XCAR (XCDR (prop)); | |
2402 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2403 | it->space_width = value; | |
2404 | } | |
2405 | else if (CONSP (prop) | |
2406 | && EQ (XCAR (prop), Qraise) | |
2407 | && CONSP (XCDR (prop))) | |
2408 | { | |
2409 | #ifdef HAVE_WINDOW_SYSTEM | |
2410 | /* `(raise FACTOR)'. */ | |
2411 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2412 | return 0; | |
2413 | ||
2414 | value = XCAR (XCDR (prop)); | |
2415 | if (NUMBERP (value)) | |
2416 | { | |
2417 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2418 | it->voffset = - (XFLOATINT (value) | |
2419 | * (face->font->ascent + face->font->descent)); | |
2420 | } | |
2421 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2422 | } | |
2423 | else if (!it->string_from_display_prop_p) | |
2424 | { | |
f3751a65 GM |
2425 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
2426 | VALUE) or `((margin nil) VALUE)' or VALUE. */ | |
5f5c8ee5 GM |
2427 | Lisp_Object location, value; |
2428 | struct text_pos start_pos; | |
2429 | int valid_p; | |
2430 | ||
2431 | /* Characters having this form of property are not displayed, so | |
2432 | we have to find the end of the property. */ | |
2433 | space_or_image_found_p = 1; | |
2434 | start_pos = *position; | |
2435 | *position = display_prop_end (it, object, start_pos); | |
2436 | ||
2437 | /* Let's stop at the new position and assume that all | |
2438 | text properties change there. */ | |
2439 | it->stop_charpos = position->charpos; | |
2440 | ||
f3751a65 GM |
2441 | location = Qunbound; |
2442 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 2443 | { |
f3751a65 GM |
2444 | Lisp_Object tem; |
2445 | ||
5f5c8ee5 | 2446 | value = XCDR (prop); |
f3751a65 GM |
2447 | if (CONSP (value)) |
2448 | value = XCAR (value); | |
2449 | ||
2450 | tem = XCAR (prop); | |
2451 | if (EQ (XCAR (tem), Qmargin) | |
2452 | && (tem = XCDR (tem), | |
2453 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
2454 | (NILP (tem) | |
2455 | || EQ (tem, Qleft_margin) | |
2456 | || EQ (tem, Qright_margin)))) | |
2457 | location = tem; | |
5f5c8ee5 | 2458 | } |
f3751a65 GM |
2459 | |
2460 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
2461 | { |
2462 | location = Qnil; | |
2463 | value = prop; | |
2464 | } | |
2465 | ||
2466 | #ifdef HAVE_WINDOW_SYSTEM | |
2467 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2468 | valid_p = STRINGP (value); | |
2469 | else | |
2470 | valid_p = (STRINGP (value) | |
2471 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2472 | || valid_image_p (value)); | |
2473 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2474 | valid_p = STRINGP (value); | |
2475 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2476 | ||
2477 | if ((EQ (location, Qleft_margin) | |
2478 | || EQ (location, Qright_margin) | |
2479 | || NILP (location)) | |
2480 | && valid_p) | |
2481 | { | |
2482 | /* Save current settings of IT so that we can restore them | |
2483 | when we are finished with the glyph property value. */ | |
2484 | push_it (it); | |
2485 | ||
2486 | if (NILP (location)) | |
2487 | it->area = TEXT_AREA; | |
2488 | else if (EQ (location, Qleft_margin)) | |
2489 | it->area = LEFT_MARGIN_AREA; | |
2490 | else | |
2491 | it->area = RIGHT_MARGIN_AREA; | |
2492 | ||
2493 | if (STRINGP (value)) | |
2494 | { | |
2495 | it->string = value; | |
2496 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2497 | it->current.overlay_string_index = -1; | |
2498 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2499 | it->end_charpos = it->string_nchars | |
2500 | = XSTRING (it->string)->size; | |
2501 | it->method = next_element_from_string; | |
2502 | it->stop_charpos = 0; | |
2503 | it->string_from_display_prop_p = 1; | |
2504 | } | |
2505 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2506 | { | |
2507 | it->method = next_element_from_stretch; | |
2508 | it->object = value; | |
2509 | it->current.pos = it->position = start_pos; | |
2510 | } | |
2511 | #ifdef HAVE_WINDOW_SYSTEM | |
2512 | else | |
2513 | { | |
2514 | it->what = IT_IMAGE; | |
2515 | it->image_id = lookup_image (it->f, value); | |
2516 | it->position = start_pos; | |
2517 | it->object = NILP (object) ? it->w->buffer : object; | |
2518 | it->method = next_element_from_image; | |
2519 | ||
2520 | /* Say that we don't have consumed the characters with | |
2521 | `display' property yet. The call to pop_it in | |
2522 | set_iterator_to_next will clean this up. */ | |
2523 | *position = start_pos; | |
2524 | } | |
2525 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2526 | } | |
2527 | } | |
2528 | ||
2529 | return space_or_image_found_p; | |
2530 | } | |
2531 | ||
2532 | ||
2533 | \f | |
2534 | /*********************************************************************** | |
2535 | Overlay strings | |
2536 | ***********************************************************************/ | |
2537 | ||
2538 | /* The following structure is used to record overlay strings for | |
2539 | later sorting in load_overlay_strings. */ | |
2540 | ||
2541 | struct overlay_entry | |
2542 | { | |
2543 | Lisp_Object string; | |
2544 | int priority; | |
2545 | int after_string_p; | |
2546 | }; | |
2547 | ||
2548 | ||
2549 | /* Set up iterator IT from overlay strings at its current position. | |
2550 | Called from handle_stop. */ | |
2551 | ||
2552 | static enum prop_handled | |
2553 | handle_overlay_change (it) | |
2554 | struct it *it; | |
2555 | { | |
2556 | /* Overlays are handled in current_buffer only. */ | |
2557 | if (STRINGP (it->string)) | |
2558 | return HANDLED_NORMALLY; | |
2559 | else | |
2560 | return (get_overlay_strings (it) | |
2561 | ? HANDLED_RECOMPUTE_PROPS | |
2562 | : HANDLED_NORMALLY); | |
2563 | } | |
2564 | ||
2565 | ||
2566 | /* Set up the next overlay string for delivery by IT, if there is an | |
2567 | overlay string to deliver. Called by set_iterator_to_next when the | |
2568 | end of the current overlay string is reached. If there are more | |
2569 | overlay strings to display, IT->string and | |
2570 | IT->current.overlay_string_index are set appropriately here. | |
2571 | Otherwise IT->string is set to nil. */ | |
2572 | ||
2573 | static void | |
2574 | next_overlay_string (it) | |
2575 | struct it *it; | |
2576 | { | |
2577 | ++it->current.overlay_string_index; | |
2578 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2579 | { | |
2580 | /* No more overlay strings. Restore IT's settings to what | |
2581 | they were before overlay strings were processed, and | |
2582 | continue to deliver from current_buffer. */ | |
2583 | pop_it (it); | |
2584 | xassert (it->stop_charpos >= BEGV | |
2585 | && it->stop_charpos <= it->end_charpos); | |
2586 | it->string = Qnil; | |
2587 | it->current.overlay_string_index = -1; | |
2588 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2589 | it->n_overlay_strings = 0; | |
2590 | it->method = next_element_from_buffer; | |
2591 | } | |
2592 | else | |
2593 | { | |
2594 | /* There are more overlay strings to process. If | |
2595 | IT->current.overlay_string_index has advanced to a position | |
2596 | where we must load IT->overlay_strings with more strings, do | |
2597 | it. */ | |
2598 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2599 | ||
2600 | if (it->current.overlay_string_index && i == 0) | |
2601 | load_overlay_strings (it); | |
2602 | ||
2603 | /* Initialize IT to deliver display elements from the overlay | |
2604 | string. */ | |
2605 | it->string = it->overlay_strings[i]; | |
2606 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2607 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2608 | it->method = next_element_from_string; | |
2609 | it->stop_charpos = 0; | |
2610 | } | |
2611 | ||
2612 | CHECK_IT (it); | |
2613 | } | |
2614 | ||
2615 | ||
2616 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2617 | comparison function for qsort in load_overlay_strings. Overlay | |
2618 | strings for the same position are sorted so that | |
2619 | ||
2620 | 1. All after-strings come in front of before-strings. | |
2621 | ||
2622 | 2. Within after-strings, strings are sorted so that overlay strings | |
2623 | from overlays with higher priorities come first. | |
2624 | ||
2625 | 2. Within before-strings, strings are sorted so that overlay | |
2626 | strings from overlays with higher priorities come last. | |
2627 | ||
2628 | Value is analogous to strcmp. */ | |
2629 | ||
2630 | ||
2631 | static int | |
2632 | compare_overlay_entries (e1, e2) | |
2633 | void *e1, *e2; | |
2634 | { | |
2635 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2636 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2637 | int result; | |
2638 | ||
2639 | if (entry1->after_string_p != entry2->after_string_p) | |
2640 | /* Let after-strings appear in front of before-strings. */ | |
2641 | result = entry1->after_string_p ? -1 : 1; | |
2642 | else if (entry1->after_string_p) | |
2643 | /* After-strings sorted in order of decreasing priority. */ | |
2644 | result = entry2->priority - entry1->priority; | |
2645 | else | |
2646 | /* Before-strings sorted in order of increasing priority. */ | |
2647 | result = entry1->priority - entry2->priority; | |
2648 | ||
2649 | return result; | |
2650 | } | |
2651 | ||
2652 | ||
2653 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2654 | current buffer position. Set IT->n_overlays to the total number of | |
2655 | overlay strings found. | |
2656 | ||
2657 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2658 | a time. On entry into load_overlay_strings, | |
2659 | IT->current.overlay_string_index gives the number of overlay | |
2660 | strings that have already been loaded by previous calls to this | |
2661 | function. | |
2662 | ||
2663 | Overlay strings are sorted so that after-string strings come in | |
2664 | front of before-string strings. Within before and after-strings, | |
2665 | strings are sorted by overlay priority. See also function | |
2666 | compare_overlay_entries. */ | |
2667 | ||
2668 | static void | |
2669 | load_overlay_strings (it) | |
2670 | struct it *it; | |
2671 | { | |
2672 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2673 | Lisp_Object ov, overlay, window, str; | |
2674 | int start, end; | |
2675 | int size = 20; | |
2676 | int n = 0, i, j; | |
2677 | struct overlay_entry *entries | |
2678 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2679 | ||
2680 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2681 | `entries' which has size `size' and currently contains `n' | |
2682 | elements. AFTER_P non-zero means STRING is an after-string of | |
2683 | OVERLAY. */ | |
2684 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2685 | do \ | |
2686 | { \ | |
2687 | Lisp_Object priority; \ | |
2688 | \ | |
2689 | if (n == size) \ | |
2690 | { \ | |
2691 | int new_size = 2 * size; \ | |
2692 | struct overlay_entry *old = entries; \ | |
2693 | entries = \ | |
2694 | (struct overlay_entry *) alloca (new_size \ | |
2695 | * sizeof *entries); \ | |
2696 | bcopy (old, entries, size * sizeof *entries); \ | |
2697 | size = new_size; \ | |
2698 | } \ | |
2699 | \ | |
2700 | entries[n].string = (STRING); \ | |
2701 | priority = Foverlay_get ((OVERLAY), Qpriority); \ | |
2702 | entries[n].priority \ | |
2703 | = INTEGERP (priority) ? XFASTINT (priority) : 0; \ | |
2704 | entries[n].after_string_p = (AFTER_P); \ | |
2705 | ++n; \ | |
2706 | } \ | |
2707 | while (0) | |
2708 | ||
2709 | /* Process overlay before the overlay center. */ | |
2710 | for (ov = current_buffer->overlays_before; | |
2711 | CONSP (ov); | |
9472f927 | 2712 | ov = XCDR (ov)) |
5f5c8ee5 | 2713 | { |
9472f927 | 2714 | overlay = XCAR (ov); |
5f5c8ee5 GM |
2715 | xassert (OVERLAYP (overlay)); |
2716 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2717 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2718 | ||
2719 | if (end < IT_CHARPOS (*it)) | |
2720 | break; | |
2721 | ||
2722 | /* Skip this overlay if it doesn't start or end at IT's current | |
2723 | position. */ | |
2724 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2725 | continue; | |
2726 | ||
2727 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2728 | window = Foverlay_get (overlay, Qwindow); | |
2729 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2730 | continue; | |
2731 | ||
2732 | /* If overlay has a non-empty before-string, record it. */ | |
2733 | if (start == IT_CHARPOS (*it) | |
2734 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2735 | && XSTRING (str)->size) | |
2736 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2737 | ||
2738 | /* If overlay has a non-empty after-string, record it. */ | |
2739 | if (end == IT_CHARPOS (*it) | |
2740 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2741 | && XSTRING (str)->size) | |
2742 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2743 | } | |
2744 | ||
2745 | /* Process overlays after the overlay center. */ | |
2746 | for (ov = current_buffer->overlays_after; | |
2747 | CONSP (ov); | |
9472f927 | 2748 | ov = XCDR (ov)) |
5f5c8ee5 | 2749 | { |
9472f927 | 2750 | overlay = XCAR (ov); |
5f5c8ee5 GM |
2751 | xassert (OVERLAYP (overlay)); |
2752 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2753 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2754 | ||
2755 | if (start > IT_CHARPOS (*it)) | |
2756 | break; | |
2757 | ||
2758 | /* Skip this overlay if it doesn't start or end at IT's current | |
2759 | position. */ | |
2760 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2761 | continue; | |
2762 | ||
2763 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2764 | window = Foverlay_get (overlay, Qwindow); | |
2765 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2766 | continue; | |
2767 | ||
2768 | /* If overlay has a non-empty before-string, record it. */ | |
2769 | if (start == IT_CHARPOS (*it) | |
2770 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2771 | && XSTRING (str)->size) | |
2772 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2773 | ||
2774 | /* If overlay has a non-empty after-string, record it. */ | |
2775 | if (end == IT_CHARPOS (*it) | |
2776 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2777 | && XSTRING (str)->size) | |
2778 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2779 | } | |
2780 | ||
2781 | #undef RECORD_OVERLAY_STRING | |
2782 | ||
2783 | /* Sort entries. */ | |
2784 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
2785 | ||
2786 | /* Record the total number of strings to process. */ | |
2787 | it->n_overlay_strings = n; | |
2788 | ||
2789 | /* IT->current.overlay_string_index is the number of overlay strings | |
2790 | that have already been consumed by IT. Copy some of the | |
2791 | remaining overlay strings to IT->overlay_strings. */ | |
2792 | i = 0; | |
2793 | j = it->current.overlay_string_index; | |
2794 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
2795 | it->overlay_strings[i++] = entries[j++].string; | |
2796 | ||
2797 | CHECK_IT (it); | |
2798 | } | |
2799 | ||
2800 | ||
2801 | /* Get the first chunk of overlay strings at IT's current buffer | |
2802 | position. Value is non-zero if at least one overlay string was | |
2803 | found. */ | |
2804 | ||
2805 | static int | |
2806 | get_overlay_strings (it) | |
2807 | struct it *it; | |
2808 | { | |
2809 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
2810 | process. This fills IT->overlay_strings with strings, and sets | |
2811 | IT->n_overlay_strings to the total number of strings to process. | |
2812 | IT->pos.overlay_string_index has to be set temporarily to zero | |
2813 | because load_overlay_strings needs this; it must be set to -1 | |
2814 | when no overlay strings are found because a zero value would | |
2815 | indicate a position in the first overlay string. */ | |
2816 | it->current.overlay_string_index = 0; | |
2817 | load_overlay_strings (it); | |
2818 | ||
2819 | /* If we found overlay strings, set up IT to deliver display | |
2820 | elements from the first one. Otherwise set up IT to deliver | |
2821 | from current_buffer. */ | |
2822 | if (it->n_overlay_strings) | |
2823 | { | |
2824 | /* Make sure we know settings in current_buffer, so that we can | |
2825 | restore meaningful values when we're done with the overlay | |
2826 | strings. */ | |
2827 | compute_stop_pos (it); | |
2828 | xassert (it->face_id >= 0); | |
2829 | ||
2830 | /* Save IT's settings. They are restored after all overlay | |
2831 | strings have been processed. */ | |
2832 | xassert (it->sp == 0); | |
2833 | push_it (it); | |
2834 | ||
2835 | /* Set up IT to deliver display elements from the first overlay | |
2836 | string. */ | |
2837 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2838 | it->stop_charpos = 0; | |
2839 | it->string = it->overlay_strings[0]; | |
2840 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2841 | xassert (STRINGP (it->string)); | |
2842 | it->method = next_element_from_string; | |
2843 | } | |
2844 | else | |
2845 | { | |
2846 | it->string = Qnil; | |
2847 | it->current.overlay_string_index = -1; | |
2848 | it->method = next_element_from_buffer; | |
2849 | } | |
2850 | ||
2851 | CHECK_IT (it); | |
2852 | ||
2853 | /* Value is non-zero if we found at least one overlay string. */ | |
2854 | return STRINGP (it->string); | |
2855 | } | |
2856 | ||
2857 | ||
2858 | \f | |
2859 | /*********************************************************************** | |
2860 | Saving and restoring state | |
2861 | ***********************************************************************/ | |
2862 | ||
2863 | /* Save current settings of IT on IT->stack. Called, for example, | |
2864 | before setting up IT for an overlay string, to be able to restore | |
2865 | IT's settings to what they were after the overlay string has been | |
2866 | processed. */ | |
2867 | ||
2868 | static void | |
2869 | push_it (it) | |
2870 | struct it *it; | |
2871 | { | |
2872 | struct iterator_stack_entry *p; | |
2873 | ||
2874 | xassert (it->sp < 2); | |
2875 | p = it->stack + it->sp; | |
2876 | ||
2877 | p->stop_charpos = it->stop_charpos; | |
2878 | xassert (it->face_id >= 0); | |
2879 | p->face_id = it->face_id; | |
2880 | p->string = it->string; | |
2881 | p->pos = it->current; | |
2882 | p->end_charpos = it->end_charpos; | |
2883 | p->string_nchars = it->string_nchars; | |
2884 | p->area = it->area; | |
2885 | p->multibyte_p = it->multibyte_p; | |
2886 | p->space_width = it->space_width; | |
2887 | p->font_height = it->font_height; | |
2888 | p->voffset = it->voffset; | |
2889 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
2890 | ++it->sp; | |
2891 | } | |
2892 | ||
2893 | ||
2894 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
2895 | more overlay strings must be processed, and we return to delivering | |
2896 | display elements from a buffer, or when the end of a string from a | |
2897 | `display' property is reached and we return to delivering display | |
2898 | elements from an overlay string, or from a buffer. */ | |
2899 | ||
2900 | static void | |
2901 | pop_it (it) | |
2902 | struct it *it; | |
2903 | { | |
2904 | struct iterator_stack_entry *p; | |
2905 | ||
2906 | xassert (it->sp > 0); | |
2907 | --it->sp; | |
2908 | p = it->stack + it->sp; | |
2909 | it->stop_charpos = p->stop_charpos; | |
2910 | it->face_id = p->face_id; | |
2911 | it->string = p->string; | |
2912 | it->current = p->pos; | |
2913 | it->end_charpos = p->end_charpos; | |
2914 | it->string_nchars = p->string_nchars; | |
2915 | it->area = p->area; | |
2916 | it->multibyte_p = p->multibyte_p; | |
2917 | it->space_width = p->space_width; | |
2918 | it->font_height = p->font_height; | |
2919 | it->voffset = p->voffset; | |
2920 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
2921 | } | |
2922 | ||
2923 | ||
2924 | \f | |
2925 | /*********************************************************************** | |
2926 | Moving over lines | |
2927 | ***********************************************************************/ | |
2928 | ||
2929 | /* Set IT's current position to the previous line start. */ | |
2930 | ||
2931 | static void | |
2932 | back_to_previous_line_start (it) | |
2933 | struct it *it; | |
2934 | { | |
2935 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
2936 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2937 | } | |
2938 | ||
2939 | ||
2940 | /* Set IT's current position to the next line start. */ | |
2941 | ||
2942 | static void | |
2943 | forward_to_next_line_start (it) | |
2944 | struct it *it; | |
2945 | { | |
2946 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
2947 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
2948 | } | |
2949 | ||
2950 | ||
2951 | /* Set IT's current position to the previous visible line start. Skip | |
2952 | invisible text that is so either due to text properties or due to | |
2953 | selective display. Caution: this does not change IT->current_x and | |
2954 | IT->hpos. */ | |
2955 | ||
2956 | static void | |
2957 | back_to_previous_visible_line_start (it) | |
2958 | struct it *it; | |
2959 | { | |
2960 | int visible_p = 0; | |
2961 | ||
2962 | /* Go back one newline if not on BEGV already. */ | |
2963 | if (IT_CHARPOS (*it) > BEGV) | |
2964 | back_to_previous_line_start (it); | |
2965 | ||
2966 | /* Move over lines that are invisible because of selective display | |
2967 | or text properties. */ | |
2968 | while (IT_CHARPOS (*it) > BEGV | |
2969 | && !visible_p) | |
2970 | { | |
2971 | visible_p = 1; | |
2972 | ||
2973 | /* If selective > 0, then lines indented more than that values | |
2974 | are invisible. */ | |
2975 | if (it->selective > 0 | |
2976 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
2977 | it->selective)) | |
2978 | visible_p = 0; | |
2979 | #ifdef USE_TEXT_PROPERTIES | |
2980 | else | |
2981 | { | |
2982 | Lisp_Object prop; | |
2983 | ||
2984 | prop = Fget_char_property (IT_CHARPOS (*it), Qinvisible, it->window); | |
2985 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2986 | visible_p = 0; | |
2987 | } | |
2988 | #endif /* USE_TEXT_PROPERTIES */ | |
2989 | ||
2990 | /* Back one more newline if the current one is invisible. */ | |
2991 | if (!visible_p) | |
2992 | back_to_previous_line_start (it); | |
2993 | } | |
2994 | ||
2995 | xassert (IT_CHARPOS (*it) >= BEGV); | |
2996 | xassert (IT_CHARPOS (*it) == BEGV | |
2997 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
2998 | CHECK_IT (it); | |
2999 | } | |
3000 | ||
3001 | ||
3002 | /* Reseat iterator IT at the previous visible line start. Skip | |
3003 | invisible text that is so either due to text properties or due to | |
3004 | selective display. At the end, update IT's overlay information, | |
3005 | face information etc. */ | |
3006 | ||
3007 | static void | |
3008 | reseat_at_previous_visible_line_start (it) | |
3009 | struct it *it; | |
3010 | { | |
3011 | back_to_previous_visible_line_start (it); | |
3012 | reseat (it, it->current.pos, 1); | |
3013 | CHECK_IT (it); | |
3014 | } | |
3015 | ||
3016 | ||
3017 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3018 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3019 | preceding the line start. Skip over invisible text that is so | |
3020 | because of selective display. Compute faces, overlays etc at the | |
3021 | new position. Note that this function does not skip over text that | |
3022 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3023 | |
3024 | static void | |
312246d1 | 3025 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3026 | struct it *it; |
312246d1 | 3027 | int on_newline_p; |
5f5c8ee5 GM |
3028 | { |
3029 | /* Restore the buffer position when currently not delivering display | |
3030 | elements from the current buffer. This is the case, for example, | |
3031 | when called at the end of a truncated overlay string. */ | |
3032 | while (it->sp) | |
3033 | pop_it (it); | |
3034 | it->method = next_element_from_buffer; | |
3035 | ||
3036 | /* Otherwise, scan_buffer would not work. */ | |
3037 | if (IT_CHARPOS (*it) < ZV) | |
3038 | { | |
3039 | /* If on a newline, advance past it. Otherwise, find the next | |
3040 | newline which automatically gives us the position following | |
3041 | the newline. */ | |
3042 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3043 | { | |
3044 | ++IT_CHARPOS (*it); | |
3045 | ++IT_BYTEPOS (*it); | |
3046 | } | |
3047 | else | |
3048 | forward_to_next_line_start (it); | |
3049 | ||
3050 | /* We must either have reached the end of the buffer or end up | |
3051 | after a newline. */ | |
3052 | xassert (IT_CHARPOS (*it) == ZV | |
3053 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3054 | ||
3055 | /* Skip over lines that are invisible because they are indented | |
3056 | more than the value of IT->selective. */ | |
3057 | if (it->selective > 0) | |
3058 | while (IT_CHARPOS (*it) < ZV | |
3059 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3060 | it->selective)) | |
3061 | forward_to_next_line_start (it); | |
312246d1 GM |
3062 | |
3063 | /* Position on the newline if we should. */ | |
3064 | if (on_newline_p && IT_CHARPOS (*it) > BEGV) | |
3065 | { | |
3066 | --IT_CHARPOS (*it); | |
3067 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3068 | } | |
5f5c8ee5 GM |
3069 | |
3070 | /* Set the iterator there. The 0 as the last parameter of | |
3071 | reseat means don't force a text property lookup. The lookup | |
3072 | is then only done if we've skipped past the iterator's | |
3073 | check_charpos'es. This optimization is important because | |
3074 | text property lookups tend to be expensive. */ | |
3075 | reseat (it, it->current.pos, 0); | |
3076 | } | |
3077 | ||
3078 | CHECK_IT (it); | |
3079 | } | |
3080 | ||
3081 | ||
3082 | \f | |
3083 | /*********************************************************************** | |
3084 | Changing an iterator's position | |
3085 | ***********************************************************************/ | |
3086 | ||
3087 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3088 | is non-zero, always check for text properties at the new position. | |
3089 | Otherwise, text properties are only looked up if POS >= | |
3090 | IT->check_charpos of a property. */ | |
3091 | ||
3092 | static void | |
3093 | reseat (it, pos, force_p) | |
3094 | struct it *it; | |
3095 | struct text_pos pos; | |
3096 | int force_p; | |
3097 | { | |
3098 | int original_pos = IT_CHARPOS (*it); | |
3099 | ||
3100 | reseat_1 (it, pos, 0); | |
3101 | ||
3102 | /* Determine where to check text properties. Avoid doing it | |
3103 | where possible because text property lookup is very expensive. */ | |
3104 | if (force_p | |
3105 | || CHARPOS (pos) > it->stop_charpos | |
3106 | || CHARPOS (pos) < original_pos) | |
3107 | handle_stop (it); | |
3108 | ||
3109 | CHECK_IT (it); | |
3110 | } | |
3111 | ||
3112 | ||
3113 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3114 | IT->stop_pos to POS, also. */ | |
3115 | ||
3116 | static void | |
3117 | reseat_1 (it, pos, set_stop_p) | |
3118 | struct it *it; | |
3119 | struct text_pos pos; | |
3120 | int set_stop_p; | |
3121 | { | |
3122 | /* Don't call this function when scanning a C string. */ | |
3123 | xassert (it->s == NULL); | |
3124 | ||
3125 | /* POS must be a reasonable value. */ | |
3126 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3127 | ||
3128 | it->current.pos = it->position = pos; | |
3129 | XSETBUFFER (it->object, current_buffer); | |
3130 | it->dpvec = NULL; | |
3131 | it->current.dpvec_index = -1; | |
3132 | it->current.overlay_string_index = -1; | |
3133 | IT_STRING_CHARPOS (*it) = -1; | |
3134 | IT_STRING_BYTEPOS (*it) = -1; | |
3135 | it->string = Qnil; | |
3136 | it->method = next_element_from_buffer; | |
3137 | it->sp = 0; | |
3138 | ||
3139 | if (set_stop_p) | |
3140 | it->stop_charpos = CHARPOS (pos); | |
3141 | } | |
3142 | ||
3143 | ||
3144 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3145 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3146 | STRING gives a Lisp string to iterate over. | |
3147 | ||
3148 | If PRECISION > 0, don't return more then PRECISION number of | |
3149 | characters from the string. | |
3150 | ||
3151 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3152 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3153 | field width. | |
3154 | ||
3155 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3156 | MULTIBYTE > 0 means enable it, | |
3157 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3158 | ||
3159 | IT must be initialized via a prior call to init_iterator before | |
3160 | calling this function. */ | |
3161 | ||
3162 | static void | |
3163 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3164 | struct it *it; | |
3165 | unsigned char *s; | |
3166 | Lisp_Object string; | |
3167 | int charpos; | |
3168 | int precision, field_width, multibyte; | |
3169 | { | |
3170 | /* No region in strings. */ | |
3171 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3172 | ||
3173 | /* No text property checks performed by default, but see below. */ | |
3174 | it->stop_charpos = -1; | |
3175 | ||
3176 | /* Set iterator position and end position. */ | |
3177 | bzero (&it->current, sizeof it->current); | |
3178 | it->current.overlay_string_index = -1; | |
3179 | it->current.dpvec_index = -1; | |
3180 | it->charset = CHARSET_ASCII; | |
3181 | xassert (charpos >= 0); | |
3182 | ||
3183 | /* Use the setting of MULTIBYTE if specified. */ | |
3184 | if (multibyte >= 0) | |
3185 | it->multibyte_p = multibyte > 0; | |
3186 | ||
3187 | if (s == NULL) | |
3188 | { | |
3189 | xassert (STRINGP (string)); | |
3190 | it->string = string; | |
3191 | it->s = NULL; | |
3192 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3193 | it->method = next_element_from_string; | |
3194 | it->current.string_pos = string_pos (charpos, string); | |
3195 | } | |
3196 | else | |
3197 | { | |
3198 | it->s = s; | |
3199 | it->string = Qnil; | |
3200 | ||
3201 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3202 | for displaying C strings. */ | |
3203 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3204 | if (it->multibyte_p) | |
3205 | { | |
3206 | it->current.pos = c_string_pos (charpos, s, 1); | |
3207 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3208 | } | |
3209 | else | |
3210 | { | |
3211 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3212 | it->end_charpos = it->string_nchars = strlen (s); | |
3213 | } | |
3214 | ||
3215 | it->method = next_element_from_c_string; | |
3216 | } | |
3217 | ||
3218 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3219 | from the string. */ | |
3220 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3221 | it->end_charpos = it->string_nchars = charpos + precision; | |
3222 | ||
3223 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3224 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3225 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3226 | padding with `-' at the end of a mode line. */ | |
3227 | if (field_width < 0) | |
3228 | field_width = INFINITY; | |
3229 | if (field_width > it->end_charpos - charpos) | |
3230 | it->end_charpos = charpos + field_width; | |
3231 | ||
3232 | /* Use the standard display table for displaying strings. */ | |
3233 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3234 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3235 | ||
3236 | it->stop_charpos = charpos; | |
3237 | CHECK_IT (it); | |
3238 | } | |
3239 | ||
3240 | ||
3241 | \f | |
3242 | /*********************************************************************** | |
3243 | Iteration | |
3244 | ***********************************************************************/ | |
3245 | ||
3246 | /* Load IT's display element fields with information about the next | |
3247 | display element from the current position of IT. Value is zero if | |
3248 | end of buffer (or C string) is reached. */ | |
3249 | ||
3250 | int | |
3251 | get_next_display_element (it) | |
3252 | struct it *it; | |
3253 | { | |
3254 | /* Non-zero means that we found an display element. Zero means that | |
3255 | we hit the end of what we iterate over. Performance note: the | |
3256 | function pointer `method' used here turns out to be faster than | |
3257 | using a sequence of if-statements. */ | |
3258 | int success_p = (*it->method) (it); | |
3259 | int charset; | |
3260 | ||
3261 | if (it->what == IT_CHARACTER) | |
3262 | { | |
3263 | /* Map via display table or translate control characters. | |
3264 | IT->c, IT->len etc. have been set to the next character by | |
3265 | the function call above. If we have a display table, and it | |
3266 | contains an entry for IT->c, translate it. Don't do this if | |
3267 | IT->c itself comes from a display table, otherwise we could | |
3268 | end up in an infinite recursion. (An alternative could be to | |
3269 | count the recursion depth of this function and signal an | |
3270 | error when a certain maximum depth is reached.) Is it worth | |
3271 | it? */ | |
3272 | if (success_p && it->dpvec == NULL) | |
3273 | { | |
3274 | Lisp_Object dv; | |
3275 | ||
3276 | if (it->dp | |
3277 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3278 | VECTORP (dv))) | |
3279 | { | |
3280 | struct Lisp_Vector *v = XVECTOR (dv); | |
3281 | ||
3282 | /* Return the first character from the display table | |
3283 | entry, if not empty. If empty, don't display the | |
3284 | current character. */ | |
3285 | if (v->size) | |
3286 | { | |
3287 | it->dpvec_char_len = it->len; | |
3288 | it->dpvec = v->contents; | |
3289 | it->dpend = v->contents + v->size; | |
3290 | it->current.dpvec_index = 0; | |
3291 | it->method = next_element_from_display_vector; | |
3292 | } | |
3293 | ||
3294 | success_p = get_next_display_element (it); | |
3295 | } | |
3296 | ||
3297 | /* Translate control characters into `\003' or `^C' form. | |
3298 | Control characters coming from a display table entry are | |
3299 | currently not translated because we use IT->dpvec to hold | |
3300 | the translation. This could easily be changed but I | |
197516c2 KH |
3301 | don't believe that it is worth doing. |
3302 | ||
3303 | Non-printable multibyte characters are also translated | |
3304 | octal form. */ | |
5f5c8ee5 GM |
3305 | else if ((it->c < ' ' |
3306 | && (it->area != TEXT_AREA | |
c6e89d6c | 3307 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 3308 | || (it->c >= 127 |
197516c2 KH |
3309 | && it->len == 1) |
3310 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
3311 | { |
3312 | /* IT->c is a control character which must be displayed | |
3313 | either as '\003' or as `^C' where the '\\' and '^' | |
3314 | can be defined in the display table. Fill | |
3315 | IT->ctl_chars with glyphs for what we have to | |
3316 | display. Then, set IT->dpvec to these glyphs. */ | |
3317 | GLYPH g; | |
3318 | ||
54c85a23 | 3319 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3320 | { |
3321 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3322 | if (it->dp | |
3323 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3324 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3325 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3326 | else | |
3327 | g = FAST_MAKE_GLYPH ('^', 0); | |
3328 | XSETINT (it->ctl_chars[0], g); | |
3329 | ||
3330 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3331 | XSETINT (it->ctl_chars[1], g); | |
3332 | ||
3333 | /* Set up IT->dpvec and return first character from it. */ | |
3334 | it->dpvec_char_len = it->len; | |
3335 | it->dpvec = it->ctl_chars; | |
3336 | it->dpend = it->dpvec + 2; | |
3337 | it->current.dpvec_index = 0; | |
3338 | it->method = next_element_from_display_vector; | |
3339 | get_next_display_element (it); | |
3340 | } | |
3341 | else | |
3342 | { | |
197516c2 KH |
3343 | unsigned char work[4], *str; |
3344 | int len = CHAR_STRING (it->c, work, str); | |
3345 | int i; | |
3346 | GLYPH escape_glyph; | |
3347 | ||
5f5c8ee5 GM |
3348 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
3349 | if (it->dp | |
3350 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3351 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 3352 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 3353 | else |
197516c2 KH |
3354 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
3355 | ||
3356 | for (i = 0; i < len; i++) | |
3357 | { | |
3358 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
3359 | /* Insert three more glyphs into IT->ctl_chars for | |
3360 | the octal display of the character. */ | |
3361 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
3362 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
3363 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
3364 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
3365 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
3366 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
3367 | } | |
5f5c8ee5 GM |
3368 | |
3369 | /* Set up IT->dpvec and return the first character | |
3370 | from it. */ | |
3371 | it->dpvec_char_len = it->len; | |
3372 | it->dpvec = it->ctl_chars; | |
197516c2 | 3373 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
3374 | it->current.dpvec_index = 0; |
3375 | it->method = next_element_from_display_vector; | |
3376 | get_next_display_element (it); | |
3377 | } | |
3378 | } | |
3379 | } | |
3380 | ||
3381 | /* Adjust face id if charset changes. There are no charset | |
3382 | changes in unibyte text because Emacs' charsets are not | |
3383 | applicable there. */ | |
3384 | if (it->multibyte_p | |
3385 | && success_p | |
3386 | && (charset = CHAR_CHARSET (it->c), | |
3387 | charset != it->charset)) | |
3388 | { | |
3389 | it->charset = charset; | |
3390 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, charset); | |
3391 | } | |
3392 | } | |
3393 | ||
3394 | /* Is this character the last one of a run of characters with | |
3395 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3396 | if (it->face_box_p | |
3397 | && it->s == NULL) | |
3398 | { | |
3399 | int face_id; | |
3400 | struct face *face; | |
3401 | ||
3402 | it->end_of_box_run_p | |
3403 | = ((face_id = face_after_it_pos (it), | |
3404 | face_id != it->face_id) | |
3405 | && (face = FACE_FROM_ID (it->f, face_id), | |
3406 | face->box == FACE_NO_BOX)); | |
3407 | } | |
3408 | ||
3409 | /* Value is 0 if end of buffer or string reached. */ | |
3410 | return success_p; | |
3411 | } | |
3412 | ||
3413 | ||
3414 | /* Move IT to the next display element. | |
3415 | ||
3416 | Functions get_next_display_element and set_iterator_to_next are | |
3417 | separate because I find this arrangement easier to handle than a | |
3418 | get_next_display_element function that also increments IT's | |
3419 | position. The way it is we can first look at an iterator's current | |
3420 | display element, decide whether it fits on a line, and if it does, | |
3421 | increment the iterator position. The other way around we probably | |
3422 | would either need a flag indicating whether the iterator has to be | |
3423 | incremented the next time, or we would have to implement a | |
3424 | decrement position function which would not be easy to write. */ | |
3425 | ||
3426 | void | |
3427 | set_iterator_to_next (it) | |
3428 | struct it *it; | |
3429 | { | |
3430 | if (it->method == next_element_from_buffer) | |
3431 | { | |
3432 | /* The current display element of IT is a character from | |
3433 | current_buffer. Advance in the buffer, and maybe skip over | |
3434 | invisible lines that are so because of selective display. */ | |
3435 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3436 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3437 | else |
3438 | { | |
3439 | xassert (it->len != 0); | |
3440 | IT_BYTEPOS (*it) += it->len; | |
3441 | IT_CHARPOS (*it) += 1; | |
3442 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3443 | } | |
3444 | } | |
3445 | else if (it->method == next_element_from_c_string) | |
3446 | { | |
3447 | /* Current display element of IT is from a C string. */ | |
3448 | IT_BYTEPOS (*it) += it->len; | |
3449 | IT_CHARPOS (*it) += 1; | |
3450 | } | |
3451 | else if (it->method == next_element_from_display_vector) | |
3452 | { | |
3453 | /* Current display element of IT is from a display table entry. | |
3454 | Advance in the display table definition. Reset it to null if | |
3455 | end reached, and continue with characters from buffers/ | |
3456 | strings. */ | |
3457 | ++it->current.dpvec_index; | |
286bcbc9 GM |
3458 | |
3459 | /* Restore face and charset of the iterator to what they were | |
3460 | before the display vector entry (these entries may contain | |
3461 | faces, and of course characters of different charsets). */ | |
5f5c8ee5 | 3462 | it->face_id = it->saved_face_id; |
286bcbc9 GM |
3463 | it->charset = FACE_FROM_ID (it->f, it->face_id)->charset; |
3464 | ||
5f5c8ee5 GM |
3465 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3466 | { | |
3467 | if (it->s) | |
3468 | it->method = next_element_from_c_string; | |
3469 | else if (STRINGP (it->string)) | |
3470 | it->method = next_element_from_string; | |
3471 | else | |
3472 | it->method = next_element_from_buffer; | |
3473 | ||
3474 | it->dpvec = NULL; | |
3475 | it->current.dpvec_index = -1; | |
3476 | ||
312246d1 GM |
3477 | /* Skip over characters which were displayed via IT->dpvec. */ |
3478 | if (it->dpvec_char_len < 0) | |
3479 | reseat_at_next_visible_line_start (it, 1); | |
3480 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3481 | { |
3482 | it->len = it->dpvec_char_len; | |
3483 | set_iterator_to_next (it); | |
3484 | } | |
3485 | } | |
3486 | } | |
3487 | else if (it->method == next_element_from_string) | |
3488 | { | |
3489 | /* Current display element is a character from a Lisp string. */ | |
3490 | xassert (it->s == NULL && STRINGP (it->string)); | |
3491 | IT_STRING_BYTEPOS (*it) += it->len; | |
3492 | IT_STRING_CHARPOS (*it) += 1; | |
3493 | ||
3494 | consider_string_end: | |
3495 | ||
3496 | if (it->current.overlay_string_index >= 0) | |
3497 | { | |
3498 | /* IT->string is an overlay string. Advance to the | |
3499 | next, if there is one. */ | |
3500 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3501 | next_overlay_string (it); | |
3502 | } | |
3503 | else | |
3504 | { | |
3505 | /* IT->string is not an overlay string. If we reached | |
3506 | its end, and there is something on IT->stack, proceed | |
3507 | with what is on the stack. This can be either another | |
3508 | string, this time an overlay string, or a buffer. */ | |
3509 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3510 | && it->sp > 0) | |
3511 | { | |
3512 | pop_it (it); | |
3513 | if (!STRINGP (it->string)) | |
3514 | it->method = next_element_from_buffer; | |
3515 | } | |
3516 | } | |
3517 | } | |
3518 | else if (it->method == next_element_from_image | |
3519 | || it->method == next_element_from_stretch) | |
3520 | { | |
3521 | /* The position etc with which we have to proceed are on | |
3522 | the stack. The position may be at the end of a string, | |
3523 | if the `display' property takes up the whole string. */ | |
3524 | pop_it (it); | |
3525 | it->image_id = 0; | |
3526 | if (STRINGP (it->string)) | |
3527 | { | |
3528 | it->method = next_element_from_string; | |
3529 | goto consider_string_end; | |
3530 | } | |
3531 | else | |
3532 | it->method = next_element_from_buffer; | |
3533 | } | |
3534 | else | |
3535 | /* There are no other methods defined, so this should be a bug. */ | |
3536 | abort (); | |
3537 | ||
3538 | /* Reset flags indicating start and end of a sequence of | |
3539 | characters with box. */ | |
3540 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3541 | ||
3542 | xassert (it->method != next_element_from_string | |
3543 | || (STRINGP (it->string) | |
3544 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3545 | } | |
3546 | ||
3547 | ||
3548 | /* Load IT's display element fields with information about the next | |
3549 | display element which comes from a display table entry or from the | |
3550 | result of translating a control character to one of the forms `^C' | |
3551 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3552 | ||
3553 | static int | |
3554 | next_element_from_display_vector (it) | |
3555 | struct it *it; | |
3556 | { | |
3557 | /* Precondition. */ | |
3558 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3559 | ||
3560 | /* Remember the current face id in case glyphs specify faces. | |
3561 | IT's face is restored in set_iterator_to_next. */ | |
3562 | it->saved_face_id = it->face_id; | |
3563 | ||
3564 | if (INTEGERP (*it->dpvec) | |
3565 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3566 | { | |
3567 | int lface_id; | |
3568 | GLYPH g; | |
3569 | ||
3570 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3571 | it->c = FAST_GLYPH_CHAR (g); | |
3572 | it->len = CHAR_LEN (it->c); | |
3573 | ||
3574 | /* The entry may contain a face id to use. Such a face id is | |
3575 | the id of a Lisp face, not a realized face. A face id of | |
3576 | zero means no face. */ | |
3577 | lface_id = FAST_GLYPH_FACE (g); | |
3578 | if (lface_id) | |
3579 | { | |
3580 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); | |
3581 | if (face_id >= 0) | |
3582 | { | |
3583 | it->face_id = face_id; | |
3584 | it->charset = CHARSET_ASCII; | |
3585 | } | |
3586 | } | |
3587 | } | |
3588 | else | |
3589 | /* Display table entry is invalid. Return a space. */ | |
3590 | it->c = ' ', it->len = 1; | |
3591 | ||
3592 | /* Don't change position and object of the iterator here. They are | |
3593 | still the values of the character that had this display table | |
3594 | entry or was translated, and that's what we want. */ | |
3595 | it->what = IT_CHARACTER; | |
3596 | return 1; | |
3597 | } | |
3598 | ||
3599 | ||
3600 | /* Load IT with the next display element from Lisp string IT->string. | |
3601 | IT->current.string_pos is the current position within the string. | |
3602 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3603 | overlay string. */ | |
3604 | ||
3605 | static int | |
3606 | next_element_from_string (it) | |
3607 | struct it *it; | |
3608 | { | |
3609 | struct text_pos position; | |
3610 | ||
3611 | xassert (STRINGP (it->string)); | |
3612 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3613 | position = it->current.string_pos; | |
3614 | ||
3615 | /* Time to check for invisible text? */ | |
3616 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3617 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3618 | { | |
3619 | handle_stop (it); | |
3620 | ||
3621 | /* Since a handler may have changed IT->method, we must | |
3622 | recurse here. */ | |
3623 | return get_next_display_element (it); | |
3624 | } | |
3625 | ||
3626 | if (it->current.overlay_string_index >= 0) | |
3627 | { | |
3628 | /* Get the next character from an overlay string. In overlay | |
3629 | strings, There is no field width or padding with spaces to | |
3630 | do. */ | |
3631 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3632 | { | |
3633 | it->what = IT_EOB; | |
3634 | return 0; | |
3635 | } | |
3636 | else if (STRING_MULTIBYTE (it->string)) | |
3637 | { | |
3638 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3639 | - IT_STRING_BYTEPOS (*it)); | |
3640 | unsigned char *s = (XSTRING (it->string)->data | |
3641 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3642 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3643 | } |
3644 | else | |
3645 | { | |
3646 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3647 | it->len = 1; | |
3648 | } | |
3649 | } | |
3650 | else | |
3651 | { | |
3652 | /* Get the next character from a Lisp string that is not an | |
3653 | overlay string. Such strings come from the mode line, for | |
3654 | example. We may have to pad with spaces, or truncate the | |
3655 | string. See also next_element_from_c_string. */ | |
3656 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3657 | { | |
3658 | it->what = IT_EOB; | |
3659 | return 0; | |
3660 | } | |
3661 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3662 | { | |
3663 | /* Pad with spaces. */ | |
3664 | it->c = ' ', it->len = 1; | |
3665 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3666 | } | |
3667 | else if (STRING_MULTIBYTE (it->string)) | |
3668 | { | |
3669 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3670 | - IT_STRING_BYTEPOS (*it)); | |
3671 | unsigned char *s = (XSTRING (it->string)->data | |
3672 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3673 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3674 | } |
3675 | else | |
3676 | { | |
3677 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3678 | it->len = 1; | |
3679 | } | |
3680 | } | |
3681 | ||
3682 | /* Record what we have and where it came from. Note that we store a | |
3683 | buffer position in IT->position although it could arguably be a | |
3684 | string position. */ | |
3685 | it->what = IT_CHARACTER; | |
3686 | it->object = it->string; | |
3687 | it->position = position; | |
3688 | return 1; | |
3689 | } | |
3690 | ||
3691 | ||
3692 | /* Load IT with next display element from C string IT->s. | |
3693 | IT->string_nchars is the maximum number of characters to return | |
3694 | from the string. IT->end_charpos may be greater than | |
3695 | IT->string_nchars when this function is called, in which case we | |
3696 | may have to return padding spaces. Value is zero if end of string | |
3697 | reached, including padding spaces. */ | |
3698 | ||
3699 | static int | |
3700 | next_element_from_c_string (it) | |
3701 | struct it *it; | |
3702 | { | |
3703 | int success_p = 1; | |
3704 | ||
3705 | xassert (it->s); | |
3706 | it->what = IT_CHARACTER; | |
3707 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
3708 | it->object = Qnil; | |
3709 | ||
3710 | /* IT's position can be greater IT->string_nchars in case a field | |
3711 | width or precision has been specified when the iterator was | |
3712 | initialized. */ | |
3713 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3714 | { | |
3715 | /* End of the game. */ | |
3716 | it->what = IT_EOB; | |
3717 | success_p = 0; | |
3718 | } | |
3719 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
3720 | { | |
3721 | /* Pad with spaces. */ | |
3722 | it->c = ' ', it->len = 1; | |
3723 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
3724 | } | |
3725 | else if (it->multibyte_p) | |
3726 | { | |
3727 | /* Implementation note: The calls to strlen apparently aren't a | |
3728 | performance problem because there is no noticeable performance | |
3729 | difference between Emacs running in unibyte or multibyte mode. */ | |
3730 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
3731 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
3732 | maxlen, &it->len); | |
5f5c8ee5 GM |
3733 | } |
3734 | else | |
3735 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
3736 | ||
3737 | return success_p; | |
3738 | } | |
3739 | ||
3740 | ||
3741 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
3742 | The definition of the ellipsis glyphs may come from a display table | |
3743 | entry. This function Fills IT with the first glyph from the | |
3744 | ellipsis if an ellipsis is to be displayed. */ | |
3745 | ||
3746 | static void | |
3747 | next_element_from_ellipsis (it) | |
3748 | struct it *it; | |
3749 | { | |
3750 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
3751 | { | |
3752 | /* Use the display table definition for `...'. Invalid glyphs | |
3753 | will be handled by the method returning elements from dpvec. */ | |
3754 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3755 | it->dpvec_char_len = it->len; | |
3756 | it->dpvec = v->contents; | |
3757 | it->dpend = v->contents + v->size; | |
3758 | it->current.dpvec_index = 0; | |
3759 | it->method = next_element_from_display_vector; | |
3760 | get_next_display_element (it); | |
3761 | } | |
3762 | else if (it->selective_display_ellipsis_p) | |
3763 | { | |
3764 | /* Use default `...' which is stored in default_invis_vector. */ | |
3765 | it->dpvec_char_len = it->len; | |
3766 | it->dpvec = default_invis_vector; | |
3767 | it->dpend = default_invis_vector + 3; | |
3768 | it->current.dpvec_index = 0; | |
3769 | it->method = next_element_from_display_vector; | |
3770 | get_next_display_element (it); | |
3771 | } | |
3772 | } | |
3773 | ||
3774 | ||
3775 | /* Deliver an image display element. The iterator IT is already | |
3776 | filled with image information (done in handle_display_prop). Value | |
3777 | is always 1. */ | |
3778 | ||
3779 | ||
3780 | static int | |
3781 | next_element_from_image (it) | |
3782 | struct it *it; | |
3783 | { | |
3784 | it->what = IT_IMAGE; | |
3785 | return 1; | |
3786 | } | |
3787 | ||
3788 | ||
3789 | /* Fill iterator IT with next display element from a stretch glyph | |
3790 | property. IT->object is the value of the text property. Value is | |
3791 | always 1. */ | |
3792 | ||
3793 | static int | |
3794 | next_element_from_stretch (it) | |
3795 | struct it *it; | |
3796 | { | |
3797 | it->what = IT_STRETCH; | |
3798 | return 1; | |
3799 | } | |
3800 | ||
3801 | ||
3802 | /* Load IT with the next display element from current_buffer. Value | |
3803 | is zero if end of buffer reached. IT->stop_charpos is the next | |
3804 | position at which to stop and check for text properties or buffer | |
3805 | end. */ | |
3806 | ||
3807 | static int | |
3808 | next_element_from_buffer (it) | |
3809 | struct it *it; | |
3810 | { | |
3811 | int success_p = 1; | |
3812 | ||
3813 | /* Check this assumption, otherwise, we would never enter the | |
3814 | if-statement, below. */ | |
3815 | xassert (IT_CHARPOS (*it) >= BEGV | |
3816 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
3817 | ||
3818 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
3819 | { | |
3820 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3821 | { | |
3822 | int overlay_strings_follow_p; | |
3823 | ||
3824 | /* End of the game, except when overlay strings follow that | |
3825 | haven't been returned yet. */ | |
3826 | if (it->overlay_strings_at_end_processed_p) | |
3827 | overlay_strings_follow_p = 0; | |
3828 | else | |
3829 | { | |
3830 | it->overlay_strings_at_end_processed_p = 1; | |
3831 | overlay_strings_follow_p | |
3832 | = get_overlay_strings (it); | |
3833 | } | |
3834 | ||
3835 | if (overlay_strings_follow_p) | |
3836 | success_p = get_next_display_element (it); | |
3837 | else | |
3838 | { | |
3839 | it->what = IT_EOB; | |
3840 | it->position = it->current.pos; | |
3841 | success_p = 0; | |
3842 | } | |
3843 | } | |
3844 | else | |
3845 | { | |
3846 | handle_stop (it); | |
3847 | return get_next_display_element (it); | |
3848 | } | |
3849 | } | |
3850 | else | |
3851 | { | |
3852 | /* No face changes, overlays etc. in sight, so just return a | |
3853 | character from current_buffer. */ | |
3854 | unsigned char *p; | |
3855 | ||
3856 | /* Maybe run the redisplay end trigger hook. Performance note: | |
3857 | This doesn't seem to cost measurable time. */ | |
3858 | if (it->redisplay_end_trigger_charpos | |
3859 | && it->glyph_row | |
3860 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
3861 | run_redisplay_end_trigger_hook (it); | |
3862 | ||
3863 | /* Get the next character, maybe multibyte. */ | |
3864 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
3865 | if (it->multibyte_p) | |
3866 | { | |
3867 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
3868 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 3869 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
3870 | } |
3871 | else | |
3872 | it->c = *p, it->len = 1; | |
3873 | ||
3874 | /* Record what we have and where it came from. */ | |
3875 | it->what = IT_CHARACTER;; | |
3876 | it->object = it->w->buffer; | |
3877 | it->position = it->current.pos; | |
3878 | ||
3879 | /* Normally we return the character found above, except when we | |
3880 | really want to return an ellipsis for selective display. */ | |
3881 | if (it->selective) | |
3882 | { | |
3883 | if (it->c == '\n') | |
3884 | { | |
3885 | /* A value of selective > 0 means hide lines indented more | |
3886 | than that number of columns. */ | |
3887 | if (it->selective > 0 | |
3888 | && IT_CHARPOS (*it) + 1 < ZV | |
3889 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
3890 | IT_BYTEPOS (*it) + 1, | |
3891 | it->selective)) | |
312246d1 GM |
3892 | { |
3893 | next_element_from_ellipsis (it); | |
3894 | it->dpvec_char_len = -1; | |
3895 | } | |
5f5c8ee5 GM |
3896 | } |
3897 | else if (it->c == '\r' && it->selective == -1) | |
3898 | { | |
3899 | /* A value of selective == -1 means that everything from the | |
3900 | CR to the end of the line is invisible, with maybe an | |
3901 | ellipsis displayed for it. */ | |
3902 | next_element_from_ellipsis (it); | |
312246d1 | 3903 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
3904 | } |
3905 | } | |
3906 | } | |
3907 | ||
3908 | /* Value is zero if end of buffer reached. */ | |
3909 | xassert (!success_p || it->len > 0); | |
3910 | return success_p; | |
3911 | } | |
3912 | ||
3913 | ||
3914 | /* Run the redisplay end trigger hook for IT. */ | |
3915 | ||
3916 | static void | |
3917 | run_redisplay_end_trigger_hook (it) | |
3918 | struct it *it; | |
3919 | { | |
3920 | Lisp_Object args[3]; | |
3921 | ||
3922 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
3923 | displaying something, or otherwise we should not run the hook. */ | |
3924 | xassert (it->glyph_row); | |
3925 | ||
3926 | /* Set up hook arguments. */ | |
3927 | args[0] = Qredisplay_end_trigger_functions; | |
3928 | args[1] = it->window; | |
3929 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
3930 | it->redisplay_end_trigger_charpos = 0; | |
3931 | ||
3932 | /* Since we are *trying* to run these functions, don't try to run | |
3933 | them again, even if they get an error. */ | |
3934 | it->w->redisplay_end_trigger = Qnil; | |
3935 | Frun_hook_with_args (3, args); | |
3936 | ||
3937 | /* Notice if it changed the face of the character we are on. */ | |
3938 | handle_face_prop (it); | |
3939 | } | |
3940 | ||
3941 | ||
3942 | \f | |
3943 | /*********************************************************************** | |
3944 | Moving an iterator without producing glyphs | |
3945 | ***********************************************************************/ | |
3946 | ||
3947 | /* Move iterator IT to a specified buffer or X position within one | |
3948 | line on the display without producing glyphs. | |
3949 | ||
3950 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
3951 | whichever is reached first. | |
3952 | ||
3953 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
3954 | ||
3955 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
3956 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
3957 | TO_X includes the amount by which a window is horizontally | |
3958 | scrolled. | |
3959 | ||
3960 | Value is | |
3961 | ||
3962 | MOVE_POS_MATCH_OR_ZV | |
3963 | - when TO_POS or ZV was reached. | |
3964 | ||
3965 | MOVE_X_REACHED | |
3966 | -when TO_X was reached before TO_POS or ZV were reached. | |
3967 | ||
3968 | MOVE_LINE_CONTINUED | |
3969 | - when we reached the end of the display area and the line must | |
3970 | be continued. | |
3971 | ||
3972 | MOVE_LINE_TRUNCATED | |
3973 | - when we reached the end of the display area and the line is | |
3974 | truncated. | |
3975 | ||
3976 | MOVE_NEWLINE_OR_CR | |
3977 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
3978 | display is on. */ | |
3979 | ||
701552dd | 3980 | static enum move_it_result |
5f5c8ee5 GM |
3981 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
3982 | struct it *it; | |
3983 | int to_charpos, to_x, op; | |
3984 | { | |
3985 | enum move_it_result result = MOVE_UNDEFINED; | |
3986 | struct glyph_row *saved_glyph_row; | |
3987 | ||
3988 | /* Don't produce glyphs in produce_glyphs. */ | |
3989 | saved_glyph_row = it->glyph_row; | |
3990 | it->glyph_row = NULL; | |
3991 | ||
5f5c8ee5 GM |
3992 | while (1) |
3993 | { | |
3994 | int x, i; | |
3995 | ||
3996 | /* Stop when ZV or TO_CHARPOS reached. */ | |
3997 | if (!get_next_display_element (it) | |
3998 | || ((op & MOVE_TO_POS) != 0 | |
3999 | && BUFFERP (it->object) | |
4000 | && IT_CHARPOS (*it) >= to_charpos)) | |
4001 | { | |
4002 | result = MOVE_POS_MATCH_OR_ZV; | |
4003 | break; | |
4004 | } | |
4005 | ||
4006 | /* The call to produce_glyphs will get the metrics of the | |
4007 | display element IT is loaded with. We record in x the | |
4008 | x-position before this display element in case it does not | |
4009 | fit on the line. */ | |
4010 | x = it->current_x; | |
4011 | PRODUCE_GLYPHS (it); | |
4012 | ||
4013 | if (it->area != TEXT_AREA) | |
4014 | { | |
4015 | set_iterator_to_next (it); | |
4016 | continue; | |
4017 | } | |
4018 | ||
4019 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4020 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4021 | character on a terminal frame, or (iii) a line end. For the | |
4022 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4023 | (on X frames, there is only one glyph produced for a | |
4024 | composite character. | |
4025 | ||
4026 | The behavior implemented below means, for continuation lines, | |
4027 | that as many spaces of a TAB as fit on the current line are | |
4028 | displayed there. For terminal frames, as many glyphs of a | |
4029 | multi-glyph character are displayed in the current line, too. | |
4030 | This is what the old redisplay code did, and we keep it that | |
4031 | way. Under X, the whole shape of a complex character must | |
4032 | fit on the line or it will be completely displayed in the | |
4033 | next line. | |
4034 | ||
4035 | Note that both for tabs and padding glyphs, all glyphs have | |
4036 | the same width. */ | |
4037 | if (it->nglyphs) | |
4038 | { | |
4039 | /* More than one glyph or glyph doesn't fit on line. All | |
4040 | glyphs have the same width. */ | |
4041 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4042 | int new_x; | |
4043 | ||
4044 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4045 | { | |
4046 | new_x = x + single_glyph_width; | |
4047 | ||
4048 | /* We want to leave anything reaching TO_X to the caller. */ | |
4049 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4050 | { | |
4051 | it->current_x = x; | |
4052 | result = MOVE_X_REACHED; | |
4053 | break; | |
4054 | } | |
4055 | else if (/* Lines are continued. */ | |
4056 | !it->truncate_lines_p | |
4057 | && (/* And glyph doesn't fit on the line. */ | |
4058 | new_x > it->last_visible_x | |
4059 | /* Or it fits exactly and we're on a window | |
4060 | system frame. */ | |
4061 | || (new_x == it->last_visible_x | |
4062 | && FRAME_WINDOW_P (it->f)))) | |
4063 | { | |
4064 | if (/* IT->hpos == 0 means the very first glyph | |
4065 | doesn't fit on the line, e.g. a wide image. */ | |
4066 | it->hpos == 0 | |
4067 | || (new_x == it->last_visible_x | |
4068 | && FRAME_WINDOW_P (it->f))) | |
4069 | { | |
4070 | ++it->hpos; | |
4071 | it->current_x = new_x; | |
4072 | if (i == it->nglyphs - 1) | |
4073 | set_iterator_to_next (it); | |
4074 | } | |
4075 | else | |
4076 | it->current_x = x; | |
4077 | ||
4078 | result = MOVE_LINE_CONTINUED; | |
4079 | break; | |
4080 | } | |
4081 | else if (new_x > it->first_visible_x) | |
4082 | { | |
4083 | /* Glyph is visible. Increment number of glyphs that | |
4084 | would be displayed. */ | |
4085 | ++it->hpos; | |
4086 | } | |
4087 | else | |
4088 | { | |
4089 | /* Glyph is completely off the left margin of the display | |
4090 | area. Nothing to do. */ | |
4091 | } | |
4092 | } | |
4093 | ||
4094 | if (result != MOVE_UNDEFINED) | |
4095 | break; | |
4096 | } | |
4097 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4098 | { | |
4099 | /* Stop when TO_X specified and reached. This check is | |
4100 | necessary here because of lines consisting of a line end, | |
4101 | only. The line end will not produce any glyphs and we | |
4102 | would never get MOVE_X_REACHED. */ | |
4103 | xassert (it->nglyphs == 0); | |
4104 | result = MOVE_X_REACHED; | |
4105 | break; | |
4106 | } | |
4107 | ||
4108 | /* Is this a line end? If yes, we're done. */ | |
4109 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4110 | { | |
4111 | result = MOVE_NEWLINE_OR_CR; | |
4112 | break; | |
4113 | } | |
4114 | ||
4115 | /* The current display element has been consumed. Advance | |
4116 | to the next. */ | |
4117 | set_iterator_to_next (it); | |
4118 | ||
4119 | /* Stop if lines are truncated and IT's current x-position is | |
4120 | past the right edge of the window now. */ | |
4121 | if (it->truncate_lines_p | |
4122 | && it->current_x >= it->last_visible_x) | |
4123 | { | |
4124 | result = MOVE_LINE_TRUNCATED; | |
4125 | break; | |
4126 | } | |
4127 | } | |
4128 | ||
4129 | /* Restore the iterator settings altered at the beginning of this | |
4130 | function. */ | |
4131 | it->glyph_row = saved_glyph_row; | |
4132 | return result; | |
4133 | } | |
4134 | ||
4135 | ||
4136 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4137 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4138 | the description of enum move_operation_enum. | |
4139 | ||
4140 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4141 | screen line, this function will set IT to the next position > | |
4142 | TO_CHARPOS. */ | |
4143 | ||
4144 | void | |
4145 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4146 | struct it *it; | |
4147 | int to_charpos, to_x, to_y, to_vpos; | |
4148 | int op; | |
4149 | { | |
4150 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4151 | int line_height; | |
4152 | ||
5f5c8ee5 GM |
4153 | while (1) |
4154 | { | |
4155 | if (op & MOVE_TO_VPOS) | |
4156 | { | |
4157 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4158 | start of the line TO_VPOS. */ | |
4159 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4160 | { | |
4161 | if (it->vpos == to_vpos) | |
4162 | break; | |
4163 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
4164 | } | |
4165 | else | |
4166 | { | |
4167 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4168 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
4169 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); | |
4170 | ||
4171 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
4172 | break; | |
4173 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) | |
4174 | { | |
4175 | /* We have reached TO_X but not in the line we want. */ | |
4176 | skip = move_it_in_display_line_to (it, to_charpos, | |
4177 | -1, MOVE_TO_POS); | |
4178 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4179 | break; | |
4180 | } | |
4181 | } | |
4182 | } | |
4183 | else if (op & MOVE_TO_Y) | |
4184 | { | |
4185 | struct it it_backup; | |
4186 | int done_p; | |
4187 | ||
4188 | /* TO_Y specified means stop at TO_X in the line containing | |
4189 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4190 | problem is that we can't really tell whether the line | |
4191 | contains TO_Y before we have completely scanned it, and | |
4192 | this may skip past TO_X. What we do is to first scan to | |
4193 | TO_X. | |
4194 | ||
4195 | If TO_X is not specified, use a TO_X of zero. The reason | |
4196 | is to make the outcome of this function more predictable. | |
4197 | If we didn't use TO_X == 0, we would stop at the end of | |
4198 | the line which is probably not what a caller would expect | |
4199 | to happen. */ | |
4200 | skip = move_it_in_display_line_to (it, to_charpos, | |
4201 | ((op & MOVE_TO_X) | |
4202 | ? to_x : 0), | |
4203 | (MOVE_TO_X | |
4204 | | (op & MOVE_TO_POS))); | |
4205 | ||
4206 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4207 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4208 | break; | |
4209 | ||
4210 | /* If TO_X was reached, we would like to know whether TO_Y | |
4211 | is in the line. This can only be said if we know the | |
4212 | total line height which requires us to scan the rest of | |
4213 | the line. */ | |
4214 | done_p = 0; | |
4215 | if (skip == MOVE_X_REACHED) | |
4216 | { | |
4217 | it_backup = *it; | |
4218 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, | |
4219 | op & MOVE_TO_POS); | |
4220 | } | |
4221 | ||
4222 | /* Now, decide whether TO_Y is in this line. */ | |
4223 | line_height = it->max_ascent + it->max_descent; | |
4224 | ||
4225 | if (to_y >= it->current_y | |
4226 | && to_y < it->current_y + line_height) | |
4227 | { | |
4228 | if (skip == MOVE_X_REACHED) | |
4229 | /* If TO_Y is in this line and TO_X was reached above, | |
4230 | we scanned too far. We have to restore IT's settings | |
4231 | to the ones before skipping. */ | |
4232 | *it = it_backup; | |
4233 | done_p = 1; | |
4234 | } | |
4235 | else if (skip == MOVE_X_REACHED) | |
4236 | { | |
4237 | skip = skip2; | |
4238 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4239 | done_p = 1; | |
4240 | } | |
4241 | ||
4242 | if (done_p) | |
4243 | break; | |
4244 | } | |
4245 | else | |
4246 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4247 | ||
4248 | switch (skip) | |
4249 | { | |
4250 | case MOVE_POS_MATCH_OR_ZV: | |
4251 | return; | |
4252 | ||
4253 | case MOVE_NEWLINE_OR_CR: | |
4254 | set_iterator_to_next (it); | |
4255 | it->continuation_lines_width = 0; | |
4256 | break; | |
4257 | ||
4258 | case MOVE_LINE_TRUNCATED: | |
4259 | it->continuation_lines_width = 0; | |
312246d1 | 4260 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4261 | if ((op & MOVE_TO_POS) != 0 |
4262 | && IT_CHARPOS (*it) > to_charpos) | |
4263 | goto out; | |
4264 | break; | |
4265 | ||
4266 | case MOVE_LINE_CONTINUED: | |
4267 | it->continuation_lines_width += it->current_x; | |
4268 | break; | |
4269 | ||
4270 | default: | |
4271 | abort (); | |
4272 | } | |
4273 | ||
4274 | /* Reset/increment for the next run. */ | |
4275 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4276 | it->current_x = it->hpos = 0; | |
4277 | it->current_y += it->max_ascent + it->max_descent; | |
4278 | ++it->vpos; | |
4279 | last_height = it->max_ascent + it->max_descent; | |
4280 | last_max_ascent = it->max_ascent; | |
4281 | it->max_ascent = it->max_descent = 0; | |
4282 | } | |
4283 | out:; | |
4284 | } | |
4285 | ||
4286 | ||
4287 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4288 | ||
4289 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4290 | means move IT backward to the preceding line start or BEGV. This | |
4291 | function may move over more than DY pixels if IT->current_y - DY | |
4292 | ends up in the middle of a line; in this case IT->current_y will be | |
4293 | set to the top of the line moved to. */ | |
4294 | ||
4295 | void | |
4296 | move_it_vertically_backward (it, dy) | |
4297 | struct it *it; | |
4298 | int dy; | |
4299 | { | |
4300 | int nlines, h, line_height; | |
4301 | struct it it2; | |
4302 | int start_pos = IT_CHARPOS (*it); | |
4303 | ||
4304 | xassert (dy >= 0); | |
4305 | ||
4306 | /* Estimate how many newlines we must move back. */ | |
4307 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4308 | ||
4309 | /* Set the iterator's position that many lines back. */ | |
4310 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4311 | back_to_previous_visible_line_start (it); | |
4312 | ||
4313 | /* Reseat the iterator here. When moving backward, we don't want | |
4314 | reseat to skip forward over invisible text, set up the iterator | |
4315 | to deliver from overlay strings at the new position etc. So, | |
4316 | use reseat_1 here. */ | |
4317 | reseat_1 (it, it->current.pos, 1); | |
4318 | ||
4319 | /* We are now surely at a line start. */ | |
4320 | it->current_x = it->hpos = 0; | |
4321 | ||
4322 | /* Move forward and see what y-distance we moved. First move to the | |
4323 | start of the next line so that we get its height. We need this | |
4324 | height to be able to tell whether we reached the specified | |
4325 | y-distance. */ | |
4326 | it2 = *it; | |
4327 | it2.max_ascent = it2.max_descent = 0; | |
4328 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4329 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4330 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4331 | line_height = it2.max_ascent + it2.max_descent; | |
4332 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); | |
4333 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4334 | h = it2.current_y - it->current_y; | |
4335 | nlines = it2.vpos - it->vpos; | |
4336 | ||
4337 | /* Correct IT's y and vpos position. */ | |
4338 | it->vpos -= nlines; | |
4339 | it->current_y -= h; | |
4340 | ||
4341 | if (dy == 0) | |
4342 | { | |
4343 | /* DY == 0 means move to the start of the screen line. The | |
4344 | value of nlines is > 0 if continuation lines were involved. */ | |
4345 | if (nlines > 0) | |
4346 | move_it_by_lines (it, nlines, 1); | |
4347 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4348 | } | |
4349 | else if (nlines) | |
4350 | { | |
4351 | /* The y-position we try to reach. Note that h has been | |
4352 | subtracted in front of the if-statement. */ | |
4353 | int target_y = it->current_y + h - dy; | |
4354 | ||
4355 | /* If we did not reach target_y, try to move further backward if | |
4356 | we can. If we moved too far backward, try to move forward. */ | |
4357 | if (target_y < it->current_y | |
4358 | && IT_CHARPOS (*it) > BEGV) | |
4359 | { | |
4360 | move_it_vertically (it, target_y - it->current_y); | |
4361 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4362 | } | |
4363 | else if (target_y >= it->current_y + line_height | |
4364 | && IT_CHARPOS (*it) < ZV) | |
4365 | { | |
4366 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4367 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4368 | } | |
4369 | } | |
4370 | } | |
4371 | ||
4372 | ||
4373 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4374 | move backwards. DY = 0 means move to start of screen line. At the | |
4375 | end, IT will be on the start of a screen line. */ | |
4376 | ||
4377 | void | |
4378 | move_it_vertically (it, dy) | |
4379 | struct it *it; | |
4380 | int dy; | |
4381 | { | |
4382 | if (dy <= 0) | |
4383 | move_it_vertically_backward (it, -dy); | |
4384 | else if (dy > 0) | |
4385 | { | |
4386 | move_it_to (it, ZV, -1, it->current_y + dy, -1, | |
4387 | MOVE_TO_POS | MOVE_TO_Y); | |
4388 | ||
4389 | /* If buffer ends in ZV without a newline, move to the start of | |
4390 | the line to satisfy the post-condition. */ | |
4391 | if (IT_CHARPOS (*it) == ZV | |
4392 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4393 | move_it_by_lines (it, 0, 0); | |
4394 | } | |
4395 | } | |
4396 | ||
4397 | ||
4398 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4399 | and END_CHARPOS is invisible. IT->window is the window for text | |
4400 | property lookup. */ | |
4401 | ||
4402 | static int | |
4403 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4404 | struct it *it; | |
4405 | int start_charpos, end_charpos; | |
4406 | { | |
4407 | #ifdef USE_TEXT_PROPERTIES | |
4408 | Lisp_Object prop, limit; | |
4409 | int invisible_found_p; | |
4410 | ||
4411 | xassert (it != NULL && start_charpos <= end_charpos); | |
4412 | ||
4413 | /* Is text at START invisible? */ | |
4414 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4415 | it->window); | |
4416 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4417 | invisible_found_p = 1; | |
4418 | else | |
4419 | { | |
6c577098 GM |
4420 | limit = next_single_char_property_change (make_number (start_charpos), |
4421 | Qinvisible, Qnil, | |
4422 | make_number (end_charpos)); | |
5f5c8ee5 GM |
4423 | invisible_found_p = XFASTINT (limit) < end_charpos; |
4424 | } | |
4425 | ||
4426 | return invisible_found_p; | |
4427 | ||
4428 | #else /* not USE_TEXT_PROPERTIES */ | |
4429 | return 0; | |
4430 | #endif /* not USE_TEXT_PROPERTIES */ | |
4431 | } | |
4432 | ||
4433 | ||
4434 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4435 | negative means move up. DVPOS == 0 means move to the start of the | |
4436 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4437 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4438 | ||
4439 | Further optimization ideas: If we would know that IT->f doesn't use | |
4440 | a face with proportional font, we could be faster for | |
4441 | truncate-lines nil. */ | |
4442 | ||
4443 | void | |
4444 | move_it_by_lines (it, dvpos, need_y_p) | |
4445 | struct it *it; | |
4446 | int dvpos, need_y_p; | |
4447 | { | |
4448 | struct position pos; | |
4449 | ||
4450 | if (!FRAME_WINDOW_P (it->f)) | |
4451 | { | |
4452 | struct text_pos textpos; | |
4453 | ||
4454 | /* We can use vmotion on frames without proportional fonts. */ | |
4455 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4456 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4457 | reseat (it, textpos, 1); | |
4458 | it->vpos += pos.vpos; | |
4459 | it->current_y += pos.vpos; | |
4460 | } | |
4461 | else if (dvpos == 0) | |
4462 | { | |
4463 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4464 | move_it_vertically_backward (it, 0); | |
4465 | xassert (it->current_x == 0 && it->hpos == 0); | |
4466 | } | |
4467 | else if (dvpos > 0) | |
4468 | { | |
4469 | /* If there are no continuation lines, and if there is no | |
4470 | selective display, try the simple method of moving forward | |
4471 | DVPOS newlines, then see where we are. */ | |
4472 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4473 | { | |
4474 | int shortage = 0, charpos; | |
4475 | ||
4476 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4477 | charpos = IT_CHARPOS (*it) + 1; | |
4478 | else | |
4479 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4480 | &shortage, 0); | |
4481 | ||
4482 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4483 | { | |
4484 | struct text_pos pos; | |
4485 | CHARPOS (pos) = charpos; | |
4486 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4487 | reseat (it, pos, 1); | |
4488 | it->vpos += dvpos - shortage; | |
4489 | it->hpos = it->current_x = 0; | |
4490 | return; | |
4491 | } | |
4492 | } | |
4493 | ||
4494 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4495 | } | |
4496 | else | |
4497 | { | |
4498 | struct it it2; | |
4499 | int start_charpos, i; | |
4500 | ||
4501 | /* If there are no continuation lines, and if there is no | |
4502 | selective display, try the simple method of moving backward | |
4503 | -DVPOS newlines. */ | |
4504 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4505 | { | |
4506 | int shortage; | |
4507 | int charpos = IT_CHARPOS (*it); | |
4508 | int bytepos = IT_BYTEPOS (*it); | |
4509 | ||
4510 | /* If in the middle of a line, go to its start. */ | |
4511 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4512 | { | |
4513 | charpos = find_next_newline_no_quit (charpos, -1); | |
4514 | bytepos = CHAR_TO_BYTE (charpos); | |
4515 | } | |
4516 | ||
4517 | if (charpos == BEGV) | |
4518 | { | |
4519 | struct text_pos pos; | |
4520 | CHARPOS (pos) = charpos; | |
4521 | BYTEPOS (pos) = bytepos; | |
4522 | reseat (it, pos, 1); | |
4523 | it->hpos = it->current_x = 0; | |
4524 | return; | |
4525 | } | |
4526 | else | |
4527 | { | |
4528 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4529 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4530 | { | |
4531 | struct text_pos pos; | |
4532 | CHARPOS (pos) = charpos; | |
4533 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4534 | reseat (it, pos, 1); | |
4535 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4536 | it->hpos = it->current_x = 0; | |
4537 | return; | |
4538 | } | |
4539 | } | |
4540 | } | |
4541 | ||
4542 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4543 | start_charpos = IT_CHARPOS (*it); | |
4544 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4545 | back_to_previous_visible_line_start (it); | |
4546 | reseat (it, it->current.pos, 1); | |
4547 | it->current_x = it->hpos = 0; | |
4548 | ||
4549 | /* Above call may have moved too far if continuation lines | |
4550 | are involved. Scan forward and see if it did. */ | |
4551 | it2 = *it; | |
4552 | it2.vpos = it2.current_y = 0; | |
4553 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4554 | it->vpos -= it2.vpos; | |
4555 | it->current_y -= it2.current_y; | |
4556 | it->current_x = it->hpos = 0; | |
4557 | ||
4558 | /* If we moved too far, move IT some lines forward. */ | |
4559 | if (it2.vpos > -dvpos) | |
4560 | { | |
4561 | int delta = it2.vpos + dvpos; | |
4562 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4563 | } | |
4564 | } | |
4565 | } | |
4566 | ||
4567 | ||
4568 | \f | |
4569 | /*********************************************************************** | |
4570 | Messages | |
4571 | ***********************************************************************/ | |
4572 | ||
4573 | ||
937248bc GM |
4574 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
4575 | to *Messages*. */ | |
4576 | ||
4577 | void | |
4578 | add_to_log (format, arg1, arg2) | |
4579 | char *format; | |
4580 | Lisp_Object arg1, arg2; | |
4581 | { | |
4582 | Lisp_Object args[3]; | |
4583 | Lisp_Object msg, fmt; | |
4584 | char *buffer; | |
4585 | int len; | |
4586 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4587 | ||
4588 | fmt = msg = Qnil; | |
4589 | GCPRO4 (fmt, msg, arg1, arg2); | |
4590 | ||
4591 | args[0] = fmt = build_string (format); | |
4592 | args[1] = arg1; | |
4593 | args[2] = arg2; | |
4594 | msg = Fformat (make_number (3), args); | |
4595 | ||
4596 | len = STRING_BYTES (XSTRING (msg)) + 1; | |
4597 | buffer = (char *) alloca (len); | |
4598 | strcpy (buffer, XSTRING (msg)->data); | |
4599 | ||
4600 | message_dolog (buffer, len, 1, 0); | |
4601 | UNGCPRO; | |
4602 | } | |
4603 | ||
4604 | ||
5f5c8ee5 GM |
4605 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
4606 | ||
4607 | void | |
4608 | message_log_maybe_newline () | |
4609 | { | |
4610 | if (message_log_need_newline) | |
4611 | message_dolog ("", 0, 1, 0); | |
4612 | } | |
4613 | ||
4614 | ||
4615 | /* Add a string M of length LEN to the message log, optionally | |
4616 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4617 | nonzero, means interpret the contents of M as multibyte. This | |
4618 | function calls low-level routines in order to bypass text property | |
4619 | hooks, etc. which might not be safe to run. */ | |
4620 | ||
4621 | void | |
4622 | message_dolog (m, len, nlflag, multibyte) | |
4623 | char *m; | |
4624 | int len, nlflag, multibyte; | |
4625 | { | |
4626 | if (!NILP (Vmessage_log_max)) | |
4627 | { | |
4628 | struct buffer *oldbuf; | |
4629 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4630 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4631 | int point_at_end = 0; | |
4632 | int zv_at_end = 0; | |
4633 | Lisp_Object old_deactivate_mark, tem; | |
4634 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4635 | ||
4636 | old_deactivate_mark = Vdeactivate_mark; | |
4637 | oldbuf = current_buffer; | |
4638 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); | |
4639 | current_buffer->undo_list = Qt; | |
4640 | ||
4641 | oldpoint = Fpoint_marker (); | |
4642 | oldbegv = Fpoint_min_marker (); | |
4643 | oldzv = Fpoint_max_marker (); | |
4644 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
4645 | ||
4646 | if (PT == Z) | |
4647 | point_at_end = 1; | |
4648 | if (ZV == Z) | |
4649 | zv_at_end = 1; | |
4650 | ||
4651 | BEGV = BEG; | |
4652 | BEGV_BYTE = BEG_BYTE; | |
4653 | ZV = Z; | |
4654 | ZV_BYTE = Z_BYTE; | |
4655 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4656 | ||
4657 | /* Insert the string--maybe converting multibyte to single byte | |
4658 | or vice versa, so that all the text fits the buffer. */ | |
4659 | if (multibyte | |
4660 | && NILP (current_buffer->enable_multibyte_characters)) | |
4661 | { | |
4662 | int i, c, nbytes; | |
4663 | unsigned char work[1]; | |
4664 | ||
4665 | /* Convert a multibyte string to single-byte | |
4666 | for the *Message* buffer. */ | |
4667 | for (i = 0; i < len; i += nbytes) | |
4668 | { | |
4fdb80f2 | 4669 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
4670 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
4671 | ? c | |
4672 | : multibyte_char_to_unibyte (c, Qnil)); | |
4673 | insert_1_both (work, 1, 1, 1, 0, 0); | |
4674 | } | |
4675 | } | |
4676 | else if (! multibyte | |
4677 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
4678 | { | |
4679 | int i, c, nbytes; | |
4680 | unsigned char *msg = (unsigned char *) m; | |
4681 | unsigned char *str, work[4]; | |
4682 | /* Convert a single-byte string to multibyte | |
4683 | for the *Message* buffer. */ | |
4684 | for (i = 0; i < len; i++) | |
4685 | { | |
4686 | c = unibyte_char_to_multibyte (msg[i]); | |
4687 | nbytes = CHAR_STRING (c, work, str); | |
4688 | insert_1_both (work, 1, nbytes, 1, 0, 0); | |
4689 | } | |
4690 | } | |
4691 | else if (len) | |
4692 | insert_1 (m, len, 1, 0, 0); | |
4693 | ||
4694 | if (nlflag) | |
4695 | { | |
4696 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
4697 | insert_1 ("\n", 1, 1, 0, 0); | |
4698 | ||
4699 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
4700 | this_bol = PT; | |
4701 | this_bol_byte = PT_BYTE; | |
4702 | ||
4703 | if (this_bol > BEG) | |
4704 | { | |
4705 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
4706 | prev_bol = PT; | |
4707 | prev_bol_byte = PT_BYTE; | |
4708 | ||
4709 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
4710 | this_bol, this_bol_byte); | |
4711 | if (dup) | |
4712 | { | |
4713 | del_range_both (prev_bol, prev_bol_byte, | |
4714 | this_bol, this_bol_byte, 0); | |
4715 | if (dup > 1) | |
4716 | { | |
4717 | char dupstr[40]; | |
4718 | int duplen; | |
4719 | ||
4720 | /* If you change this format, don't forget to also | |
4721 | change message_log_check_duplicate. */ | |
4722 | sprintf (dupstr, " [%d times]", dup); | |
4723 | duplen = strlen (dupstr); | |
4724 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
4725 | insert_1 (dupstr, duplen, 1, 0, 1); | |
4726 | } | |
4727 | } | |
4728 | } | |
4729 | ||
4730 | if (NATNUMP (Vmessage_log_max)) | |
4731 | { | |
4732 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
4733 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
4734 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
4735 | } | |
4736 | } | |
4737 | BEGV = XMARKER (oldbegv)->charpos; | |
4738 | BEGV_BYTE = marker_byte_position (oldbegv); | |
4739 | ||
4740 | if (zv_at_end) | |
4741 | { | |
4742 | ZV = Z; | |
4743 | ZV_BYTE = Z_BYTE; | |
4744 | } | |
4745 | else | |
4746 | { | |
4747 | ZV = XMARKER (oldzv)->charpos; | |
4748 | ZV_BYTE = marker_byte_position (oldzv); | |
4749 | } | |
4750 | ||
4751 | if (point_at_end) | |
4752 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4753 | else | |
4754 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
4755 | Lisp code. */ | |
4756 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
4757 | XMARKER (oldpoint)->bytepos); | |
4758 | ||
4759 | UNGCPRO; | |
4760 | free_marker (oldpoint); | |
4761 | free_marker (oldbegv); | |
4762 | free_marker (oldzv); | |
4763 | ||
4764 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
4765 | set_buffer_internal (oldbuf); | |
4766 | if (NILP (tem)) | |
4767 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
4768 | message_log_need_newline = !nlflag; | |
4769 | Vdeactivate_mark = old_deactivate_mark; | |
4770 | } | |
4771 | } | |
4772 | ||
4773 | ||
4774 | /* We are at the end of the buffer after just having inserted a newline. | |
4775 | (Note: We depend on the fact we won't be crossing the gap.) | |
4776 | Check to see if the most recent message looks a lot like the previous one. | |
4777 | Return 0 if different, 1 if the new one should just replace it, or a | |
4778 | value N > 1 if we should also append " [N times]". */ | |
4779 | ||
4780 | static int | |
4781 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
4782 | int prev_bol, this_bol; | |
4783 | int prev_bol_byte, this_bol_byte; | |
4784 | { | |
4785 | int i; | |
4786 | int len = Z_BYTE - 1 - this_bol_byte; | |
4787 | int seen_dots = 0; | |
4788 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
4789 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
4790 | ||
4791 | for (i = 0; i < len; i++) | |
4792 | { | |
4793 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
4794 | && p1[i] != '\n') | |
4795 | seen_dots = 1; | |
4796 | if (p1[i] != p2[i]) | |
4797 | return seen_dots; | |
4798 | } | |
4799 | p1 += len; | |
4800 | if (*p1 == '\n') | |
4801 | return 2; | |
4802 | if (*p1++ == ' ' && *p1++ == '[') | |
4803 | { | |
4804 | int n = 0; | |
4805 | while (*p1 >= '0' && *p1 <= '9') | |
4806 | n = n * 10 + *p1++ - '0'; | |
4807 | if (strncmp (p1, " times]\n", 8) == 0) | |
4808 | return n+1; | |
4809 | } | |
4810 | return 0; | |
4811 | } | |
4812 | ||
4813 | ||
4814 | /* Display an echo area message M with a specified length of LEN | |
4815 | chars. The string may include null characters. If M is 0, clear | |
4816 | out any existing message, and let the mini-buffer text show through. | |
4817 | ||
4818 | The buffer M must continue to exist until after the echo area gets | |
4819 | cleared or some other message gets displayed there. This means do | |
4820 | not pass text that is stored in a Lisp string; do not pass text in | |
4821 | a buffer that was alloca'd. */ | |
4822 | ||
4823 | void | |
4824 | message2 (m, len, multibyte) | |
4825 | char *m; | |
4826 | int len; | |
4827 | int multibyte; | |
4828 | { | |
4829 | /* First flush out any partial line written with print. */ | |
4830 | message_log_maybe_newline (); | |
4831 | if (m) | |
4832 | message_dolog (m, len, 1, multibyte); | |
4833 | message2_nolog (m, len, multibyte); | |
4834 | } | |
4835 | ||
4836 | ||
4837 | /* The non-logging counterpart of message2. */ | |
4838 | ||
4839 | void | |
4840 | message2_nolog (m, len, multibyte) | |
4841 | char *m; | |
4842 | int len; | |
4843 | { | |
886bd6f2 | 4844 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
4845 | message_enable_multibyte = multibyte; |
4846 | ||
4847 | if (noninteractive) | |
4848 | { | |
4849 | if (noninteractive_need_newline) | |
4850 | putc ('\n', stderr); | |
4851 | noninteractive_need_newline = 0; | |
4852 | if (m) | |
4853 | fwrite (m, len, 1, stderr); | |
4854 | if (cursor_in_echo_area == 0) | |
4855 | fprintf (stderr, "\n"); | |
4856 | fflush (stderr); | |
4857 | } | |
4858 | /* A null message buffer means that the frame hasn't really been | |
4859 | initialized yet. Error messages get reported properly by | |
4860 | cmd_error, so this must be just an informative message; toss it. */ | |
4861 | else if (INTERACTIVE | |
886bd6f2 GM |
4862 | && sf->glyphs_initialized_p |
4863 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
4864 | { |
4865 | Lisp_Object mini_window; | |
4866 | struct frame *f; | |
4867 | ||
4868 | /* Get the frame containing the mini-buffer | |
4869 | that the selected frame is using. */ | |
886bd6f2 | 4870 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
4871 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
4872 | ||
4873 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 4874 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
4875 | && ! FRAME_VISIBLE_P (f)) |
4876 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4877 | ||
4878 | if (m) | |
4879 | { | |
c6e89d6c | 4880 | set_message (m, Qnil, len, multibyte); |
5f5c8ee5 GM |
4881 | if (minibuffer_auto_raise) |
4882 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4883 | } | |
4884 | else | |
c6e89d6c | 4885 | clear_message (1, 1); |
5f5c8ee5 | 4886 | |
c6e89d6c | 4887 | do_pending_window_change (0); |
5f5c8ee5 | 4888 | echo_area_display (1); |
c6e89d6c | 4889 | do_pending_window_change (0); |
5f5c8ee5 GM |
4890 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
4891 | (*frame_up_to_date_hook) (f); | |
4892 | } | |
4893 | } | |
4894 | ||
4895 | ||
c6e89d6c GM |
4896 | /* Display an echo area message M with a specified length of NBYTES |
4897 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
4898 | string, clear out any existing message, and let the mini-buffer |
4899 | text show through. */ | |
4900 | ||
4901 | void | |
c6e89d6c | 4902 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 4903 | Lisp_Object m; |
c6e89d6c | 4904 | int nbytes; |
5f5c8ee5 GM |
4905 | int multibyte; |
4906 | { | |
4907 | struct gcpro gcpro1; | |
4908 | ||
4909 | GCPRO1 (m); | |
4910 | ||
4911 | /* First flush out any partial line written with print. */ | |
4912 | message_log_maybe_newline (); | |
4913 | if (STRINGP (m)) | |
c6e89d6c GM |
4914 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
4915 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
4916 | |
4917 | UNGCPRO; | |
4918 | } | |
4919 | ||
4920 | ||
4921 | /* The non-logging version of message3. */ | |
4922 | ||
4923 | void | |
c6e89d6c | 4924 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 4925 | Lisp_Object m; |
c6e89d6c | 4926 | int nbytes, multibyte; |
5f5c8ee5 | 4927 | { |
886bd6f2 | 4928 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
4929 | message_enable_multibyte = multibyte; |
4930 | ||
4931 | if (noninteractive) | |
4932 | { | |
4933 | if (noninteractive_need_newline) | |
4934 | putc ('\n', stderr); | |
4935 | noninteractive_need_newline = 0; | |
4936 | if (STRINGP (m)) | |
c6e89d6c | 4937 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
4938 | if (cursor_in_echo_area == 0) |
4939 | fprintf (stderr, "\n"); | |
4940 | fflush (stderr); | |
4941 | } | |
4942 | /* A null message buffer means that the frame hasn't really been | |
4943 | initialized yet. Error messages get reported properly by | |
4944 | cmd_error, so this must be just an informative message; toss it. */ | |
4945 | else if (INTERACTIVE | |
886bd6f2 GM |
4946 | && sf->glyphs_initialized_p |
4947 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
4948 | { |
4949 | Lisp_Object mini_window; | |
c6e89d6c | 4950 | Lisp_Object frame; |
5f5c8ee5 GM |
4951 | struct frame *f; |
4952 | ||
4953 | /* Get the frame containing the mini-buffer | |
4954 | that the selected frame is using. */ | |
886bd6f2 | 4955 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
4956 | frame = XWINDOW (mini_window)->frame; |
4957 | f = XFRAME (frame); | |
5f5c8ee5 GM |
4958 | |
4959 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 4960 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
4961 | && !FRAME_VISIBLE_P (f)) |
4962 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 4963 | |
c6e89d6c | 4964 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 4965 | { |
c6e89d6c | 4966 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
4967 | if (minibuffer_auto_raise) |
4968 | Fraise_frame (frame); | |
5f5c8ee5 GM |
4969 | } |
4970 | else | |
c6e89d6c | 4971 | clear_message (1, 1); |
5f5c8ee5 | 4972 | |
c6e89d6c | 4973 | do_pending_window_change (0); |
5f5c8ee5 | 4974 | echo_area_display (1); |
c6e89d6c | 4975 | do_pending_window_change (0); |
5f5c8ee5 GM |
4976 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
4977 | (*frame_up_to_date_hook) (f); | |
4978 | } | |
4979 | } | |
4980 | ||
4981 | ||
4982 | /* Display a null-terminated echo area message M. If M is 0, clear | |
4983 | out any existing message, and let the mini-buffer text show through. | |
4984 | ||
4985 | The buffer M must continue to exist until after the echo area gets | |
4986 | cleared or some other message gets displayed there. Do not pass | |
4987 | text that is stored in a Lisp string. Do not pass text in a buffer | |
4988 | that was alloca'd. */ | |
4989 | ||
4990 | void | |
4991 | message1 (m) | |
4992 | char *m; | |
4993 | { | |
4994 | message2 (m, (m ? strlen (m) : 0), 0); | |
4995 | } | |
4996 | ||
4997 | ||
4998 | /* The non-logging counterpart of message1. */ | |
4999 | ||
5000 | void | |
5001 | message1_nolog (m) | |
5002 | char *m; | |
5003 | { | |
5004 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5005 | } | |
5006 | ||
5007 | /* Display a message M which contains a single %s | |
5008 | which gets replaced with STRING. */ | |
5009 | ||
5010 | void | |
5011 | message_with_string (m, string, log) | |
5012 | char *m; | |
5013 | Lisp_Object string; | |
5014 | int log; | |
5015 | { | |
5016 | if (noninteractive) | |
5017 | { | |
5018 | if (m) | |
5019 | { | |
5020 | if (noninteractive_need_newline) | |
5021 | putc ('\n', stderr); | |
5022 | noninteractive_need_newline = 0; | |
5023 | fprintf (stderr, m, XSTRING (string)->data); | |
5024 | if (cursor_in_echo_area == 0) | |
5025 | fprintf (stderr, "\n"); | |
5026 | fflush (stderr); | |
5027 | } | |
5028 | } | |
5029 | else if (INTERACTIVE) | |
5030 | { | |
5031 | /* The frame whose minibuffer we're going to display the message on. | |
5032 | It may be larger than the selected frame, so we need | |
5033 | to use its buffer, not the selected frame's buffer. */ | |
5034 | Lisp_Object mini_window; | |
886bd6f2 | 5035 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5036 | |
5037 | /* Get the frame containing the minibuffer | |
5038 | that the selected frame is using. */ | |
886bd6f2 | 5039 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5040 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5041 | ||
5042 | /* A null message buffer means that the frame hasn't really been | |
5043 | initialized yet. Error messages get reported properly by | |
5044 | cmd_error, so this must be just an informative message; toss it. */ | |
5045 | if (FRAME_MESSAGE_BUF (f)) | |
5046 | { | |
5047 | int len; | |
5048 | char *a[1]; | |
5049 | a[0] = (char *) XSTRING (string)->data; | |
5050 | ||
5051 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5052 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5053 | ||
5054 | if (log) | |
5055 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5056 | STRING_MULTIBYTE (string)); | |
5057 | else | |
5058 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5059 | STRING_MULTIBYTE (string)); | |
5060 | ||
5061 | /* Print should start at the beginning of the message | |
5062 | buffer next time. */ | |
5063 | message_buf_print = 0; | |
5064 | } | |
5065 | } | |
5066 | } | |
5067 | ||
5068 | ||
5f5c8ee5 GM |
5069 | /* Dump an informative message to the minibuf. If M is 0, clear out |
5070 | any existing message, and let the mini-buffer text show through. */ | |
5071 | ||
5072 | /* VARARGS 1 */ | |
5073 | void | |
5074 | message (m, a1, a2, a3) | |
5075 | char *m; | |
5076 | EMACS_INT a1, a2, a3; | |
5077 | { | |
5078 | if (noninteractive) | |
5079 | { | |
5080 | if (m) | |
5081 | { | |
5082 | if (noninteractive_need_newline) | |
5083 | putc ('\n', stderr); | |
5084 | noninteractive_need_newline = 0; | |
5085 | fprintf (stderr, m, a1, a2, a3); | |
5086 | if (cursor_in_echo_area == 0) | |
5087 | fprintf (stderr, "\n"); | |
5088 | fflush (stderr); | |
5089 | } | |
5090 | } | |
5091 | else if (INTERACTIVE) | |
5092 | { | |
5093 | /* The frame whose mini-buffer we're going to display the message | |
5094 | on. It may be larger than the selected frame, so we need to | |
5095 | use its buffer, not the selected frame's buffer. */ | |
5096 | Lisp_Object mini_window; | |
886bd6f2 | 5097 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5098 | |
5099 | /* Get the frame containing the mini-buffer | |
5100 | that the selected frame is using. */ | |
886bd6f2 | 5101 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5102 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5103 | ||
5104 | /* A null message buffer means that the frame hasn't really been | |
5105 | initialized yet. Error messages get reported properly by | |
5106 | cmd_error, so this must be just an informative message; toss | |
5107 | it. */ | |
5108 | if (FRAME_MESSAGE_BUF (f)) | |
5109 | { | |
5110 | if (m) | |
5111 | { | |
5112 | int len; | |
5113 | #ifdef NO_ARG_ARRAY | |
5114 | char *a[3]; | |
5115 | a[0] = (char *) a1; | |
5116 | a[1] = (char *) a2; | |
5117 | a[2] = (char *) a3; | |
5118 | ||
5119 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5120 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5121 | #else | |
5122 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5123 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5124 | (char **) &a1); | |
5125 | #endif /* NO_ARG_ARRAY */ | |
5126 | ||
5127 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5128 | } | |
5129 | else | |
5130 | message1 (0); | |
5131 | ||
5132 | /* Print should start at the beginning of the message | |
5133 | buffer next time. */ | |
5134 | message_buf_print = 0; | |
5135 | } | |
5136 | } | |
5137 | } | |
5138 | ||
5139 | ||
5140 | /* The non-logging version of message. */ | |
5141 | ||
5142 | void | |
5143 | message_nolog (m, a1, a2, a3) | |
5144 | char *m; | |
5145 | EMACS_INT a1, a2, a3; | |
5146 | { | |
5147 | Lisp_Object old_log_max; | |
5148 | old_log_max = Vmessage_log_max; | |
5149 | Vmessage_log_max = Qnil; | |
5150 | message (m, a1, a2, a3); | |
5151 | Vmessage_log_max = old_log_max; | |
5152 | } | |
5153 | ||
5154 | ||
c6e89d6c GM |
5155 | /* Display the current message in the current mini-buffer. This is |
5156 | only called from error handlers in process.c, and is not time | |
5157 | critical. */ | |
5f5c8ee5 GM |
5158 | |
5159 | void | |
5160 | update_echo_area () | |
5161 | { | |
c6e89d6c GM |
5162 | if (!NILP (echo_area_buffer[0])) |
5163 | { | |
5164 | Lisp_Object string; | |
5165 | string = Fcurrent_message (); | |
5166 | message3 (string, XSTRING (string)->size, | |
5167 | !NILP (current_buffer->enable_multibyte_characters)); | |
5168 | } | |
5169 | } | |
5170 | ||
5171 | ||
5172 | /* Call FN with args A1..A5 with either the current or last displayed | |
5173 | echo_area_buffer as current buffer. | |
5174 | ||
5175 | WHICH zero means use the current message buffer | |
5176 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
5177 | from echo_buffer[] and clear it. | |
5178 | ||
5179 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
5180 | suitable buffer from echo_buffer[] and clear it. | |
5181 | ||
5182 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
5183 | that the current message becomes the last displayed one, make | |
5184 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
5185 | ||
5186 | Value is what FN returns. */ | |
5187 | ||
5188 | static int | |
5189 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4, a5) | |
5190 | struct window *w; | |
5191 | int which; | |
5192 | int (*fn) (); | |
5193 | int a1, a2, a3, a4, a5; | |
5194 | { | |
5195 | Lisp_Object buffer; | |
5196 | int i, this_one, the_other, clear_buffer_p, rc; | |
5197 | int count = specpdl_ptr - specpdl; | |
5198 | ||
5199 | /* If buffers aren't life, make new ones. */ | |
5200 | for (i = 0; i < 2; ++i) | |
5201 | if (!BUFFERP (echo_buffer[i]) | |
5202 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
5203 | { | |
5204 | char name[30]; | |
5205 | sprintf (name, " *Echo Area %d*", i); | |
5206 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
5207 | } | |
5208 | ||
5209 | clear_buffer_p = 0; | |
5210 | ||
5211 | if (which == 0) | |
5212 | this_one = 0, the_other = 1; | |
5213 | else if (which > 0) | |
5214 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 5215 | else |
c6e89d6c GM |
5216 | { |
5217 | this_one = 0, the_other = 1; | |
5218 | clear_buffer_p = 1; | |
5219 | ||
5220 | /* We need a fresh one in case the current echo buffer equals | |
5221 | the one containing the last displayed echo area message. */ | |
5222 | if (!NILP (echo_area_buffer[this_one]) | |
5223 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
5224 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
5225 | } |
5226 | ||
5227 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
5228 | have one. */ | |
5229 | if (NILP (echo_area_buffer[this_one])) | |
5230 | { | |
5231 | echo_area_buffer[this_one] | |
5232 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
5233 | ? echo_buffer[the_other] | |
5234 | : echo_buffer[this_one]); | |
5235 | clear_buffer_p = 1; | |
5236 | } | |
5237 | ||
5238 | buffer = echo_area_buffer[this_one]; | |
5239 | ||
5240 | record_unwind_protect (unwind_with_echo_area_buffer, | |
5241 | with_echo_area_buffer_unwind_data (w)); | |
5242 | ||
5243 | /* Make the echo area buffer current. Note that for display | |
5244 | purposes, it is not necessary that the displayed window's buffer | |
5245 | == current_buffer, except for text property lookup. So, let's | |
5246 | only set that buffer temporarily here without doing a full | |
5247 | Fset_window_buffer. We must also change w->pointm, though, | |
5248 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
5249 | aborts. */ | |
9142dd5b | 5250 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
5251 | if (w) |
5252 | { | |
5253 | w->buffer = buffer; | |
5254 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
5255 | } | |
5256 | current_buffer->truncate_lines = Qnil; | |
5257 | current_buffer->undo_list = Qt; | |
5258 | current_buffer->read_only = Qnil; | |
5259 | ||
5260 | if (clear_buffer_p && Z > BEG) | |
5261 | del_range (BEG, Z); | |
5262 | ||
5263 | xassert (BEGV >= BEG); | |
5264 | xassert (ZV <= Z && ZV >= BEGV); | |
5265 | ||
5266 | rc = fn (a1, a2, a3, a4, a5); | |
5267 | ||
5268 | xassert (BEGV >= BEG); | |
5269 | xassert (ZV <= Z && ZV >= BEGV); | |
5270 | ||
5271 | unbind_to (count, Qnil); | |
5272 | return rc; | |
5f5c8ee5 GM |
5273 | } |
5274 | ||
5275 | ||
c6e89d6c GM |
5276 | /* Save state that should be preserved around the call to the function |
5277 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 5278 | |
c6e89d6c GM |
5279 | static Lisp_Object |
5280 | with_echo_area_buffer_unwind_data (w) | |
5281 | struct window *w; | |
5f5c8ee5 | 5282 | { |
c6e89d6c GM |
5283 | int i = 0; |
5284 | Lisp_Object vector; | |
5f5c8ee5 | 5285 | |
c6e89d6c GM |
5286 | /* Reduce consing by keeping one vector in |
5287 | Vwith_echo_area_save_vector. */ | |
5288 | vector = Vwith_echo_area_save_vector; | |
5289 | Vwith_echo_area_save_vector = Qnil; | |
5290 | ||
5291 | if (NILP (vector)) | |
9142dd5b | 5292 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c GM |
5293 | |
5294 | XSETBUFFER (XVECTOR (vector)->contents[i], current_buffer); ++i; | |
5295 | XVECTOR (vector)->contents[i++] = Vdeactivate_mark; | |
5296 | XVECTOR (vector)->contents[i++] = make_number (windows_or_buffers_changed); | |
c6e89d6c GM |
5297 | |
5298 | if (w) | |
5299 | { | |
5300 | XSETWINDOW (XVECTOR (vector)->contents[i], w); ++i; | |
5301 | XVECTOR (vector)->contents[i++] = w->buffer; | |
5302 | XVECTOR (vector)->contents[i++] | |
5303 | = make_number (XMARKER (w->pointm)->charpos); | |
5304 | XVECTOR (vector)->contents[i++] | |
5305 | = make_number (XMARKER (w->pointm)->bytepos); | |
5306 | } | |
5307 | else | |
5308 | { | |
5309 | int end = i + 4; | |
5310 | while (i < end) | |
5311 | XVECTOR (vector)->contents[i++] = Qnil; | |
5312 | } | |
5f5c8ee5 | 5313 | |
c6e89d6c GM |
5314 | xassert (i == XVECTOR (vector)->size); |
5315 | return vector; | |
5316 | } | |
5f5c8ee5 | 5317 | |
5f5c8ee5 | 5318 | |
c6e89d6c GM |
5319 | /* Restore global state from VECTOR which was created by |
5320 | with_echo_area_buffer_unwind_data. */ | |
5321 | ||
5322 | static Lisp_Object | |
5323 | unwind_with_echo_area_buffer (vector) | |
5324 | Lisp_Object vector; | |
5325 | { | |
5326 | int i = 0; | |
5327 | ||
9142dd5b | 5328 | set_buffer_internal_1 (XBUFFER (XVECTOR (vector)->contents[i])); ++i; |
c6e89d6c GM |
5329 | Vdeactivate_mark = XVECTOR (vector)->contents[i]; ++i; |
5330 | windows_or_buffers_changed = XFASTINT (XVECTOR (vector)->contents[i]); ++i; | |
c6e89d6c GM |
5331 | |
5332 | if (WINDOWP (XVECTOR (vector)->contents[i])) | |
5333 | { | |
5334 | struct window *w; | |
5335 | Lisp_Object buffer, charpos, bytepos; | |
5336 | ||
5337 | w = XWINDOW (XVECTOR (vector)->contents[i]); ++i; | |
5338 | buffer = XVECTOR (vector)->contents[i]; ++i; | |
5339 | charpos = XVECTOR (vector)->contents[i]; ++i; | |
5340 | bytepos = XVECTOR (vector)->contents[i]; ++i; | |
5341 | ||
5342 | w->buffer = buffer; | |
5343 | set_marker_both (w->pointm, buffer, | |
5344 | XFASTINT (charpos), XFASTINT (bytepos)); | |
5345 | } | |
5346 | ||
5347 | Vwith_echo_area_save_vector = vector; | |
5348 | return Qnil; | |
5349 | } | |
5350 | ||
5351 | ||
5352 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
5353 | non-zero means we will print multibyte. */ | |
5354 | ||
5355 | void | |
5356 | setup_echo_area_for_printing (multibyte_p) | |
5357 | int multibyte_p; | |
5358 | { | |
5359 | if (!message_buf_print) | |
5360 | { | |
5361 | /* A message has been output since the last time we printed. | |
5362 | Choose a fresh echo area buffer. */ | |
5363 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
5364 | echo_area_buffer[0] = echo_buffer[1]; | |
5365 | else | |
5366 | echo_area_buffer[0] = echo_buffer[0]; | |
5367 | ||
5368 | /* Switch to that buffer and clear it. */ | |
5369 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5370 | if (Z > BEG) | |
5371 | del_range (BEG, Z); | |
5372 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5373 | ||
5374 | /* Set up the buffer for the multibyteness we need. */ | |
5375 | if (multibyte_p | |
5376 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5377 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
5378 | ||
5379 | /* Raise the frame containing the echo area. */ | |
5380 | if (minibuffer_auto_raise) | |
5381 | { | |
886bd6f2 | 5382 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5383 | Lisp_Object mini_window; |
886bd6f2 | 5384 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5385 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
5386 | } | |
5387 | ||
5388 | message_buf_print = 1; | |
5389 | } | |
5390 | else if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
5391 | /* Someone switched buffers between print requests. */ | |
5392 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5393 | } | |
5394 | ||
5395 | ||
dd2eb166 GM |
5396 | /* Display an echo area message in window W. Value is non-zero if W's |
5397 | height is changed. If display_last_displayed_message_p is | |
5398 | non-zero, display the message that was last displayed, otherwise | |
5399 | display the current message. */ | |
c6e89d6c GM |
5400 | |
5401 | static int | |
5402 | display_echo_area (w) | |
5403 | struct window *w; | |
5404 | { | |
dd2eb166 GM |
5405 | int i, no_message_p, window_height_changed_p; |
5406 | ||
5407 | /* If there is no message, we must call display_echo_area_1 | |
5408 | nevertheless because it resizes the window. But we will have to | |
5409 | reset the echo_area_buffer in question to nil at the end because | |
5410 | with_echo_area_buffer will sets it to an empty buffer. */ | |
5411 | i = display_last_displayed_message_p ? 1 : 0; | |
5412 | no_message_p = NILP (echo_area_buffer[i]); | |
5413 | ||
5414 | window_height_changed_p | |
5415 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
5416 | (int (*) ()) display_echo_area_1, w); | |
5417 | ||
5418 | if (no_message_p) | |
5419 | echo_area_buffer[i] = Qnil; | |
5420 | ||
5421 | return window_height_changed_p; | |
c6e89d6c GM |
5422 | } |
5423 | ||
5424 | ||
5425 | /* Helper for display_echo_area. Display the current buffer which | |
5426 | contains the current echo area message in window W, a mini-window. | |
5427 | Change the height of W so that all of the message is displayed. | |
5428 | Value is non-zero if height of W was changed. */ | |
5429 | ||
5430 | static int | |
5431 | display_echo_area_1 (w) | |
5432 | struct window *w; | |
5433 | { | |
5434 | Lisp_Object window; | |
c6e89d6c GM |
5435 | struct text_pos start; |
5436 | int window_height_changed_p = 0; | |
5437 | ||
5438 | /* Do this before displaying, so that we have a large enough glyph | |
5439 | matrix for the display. */ | |
92a90e89 | 5440 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
5441 | |
5442 | /* Display. */ | |
5443 | clear_glyph_matrix (w->desired_matrix); | |
5444 | XSETWINDOW (window, w); | |
5445 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
5446 | try_window (window, start); | |
5447 | ||
c6e89d6c GM |
5448 | return window_height_changed_p; |
5449 | } | |
5450 | ||
5451 | ||
92a90e89 GM |
5452 | /* Resize the echo area window to exactly the size needed for the |
5453 | currently displayed message, if there is one. */ | |
5454 | ||
5455 | void | |
5456 | resize_echo_area_axactly () | |
5457 | { | |
5458 | if (BUFFERP (echo_area_buffer[0]) | |
5459 | && WINDOWP (echo_area_window)) | |
5460 | { | |
5461 | struct window *w = XWINDOW (echo_area_window); | |
5462 | int resized_p; | |
5463 | ||
5464 | resized_p = with_echo_area_buffer (w, 0, | |
5465 | (int (*) ()) resize_mini_window, | |
5466 | w, 1); | |
5467 | if (resized_p) | |
5468 | { | |
5469 | ++windows_or_buffers_changed; | |
5470 | ++update_mode_lines; | |
5471 | redisplay_internal (0); | |
5472 | } | |
5473 | } | |
5474 | } | |
5475 | ||
5476 | ||
5477 | /* Resize mini-window W to fit the size of its contents. EXACT:P | |
5478 | means size the window exactly to the size needed. Otherwise, it's | |
5479 | only enlarged until W's buffer is empty. Value is non-zero if | |
5480 | the window height has been changed. */ | |
c6e89d6c | 5481 | |
9472f927 | 5482 | int |
92a90e89 | 5483 | resize_mini_window (w, exact_p) |
c6e89d6c | 5484 | struct window *w; |
92a90e89 | 5485 | int exact_p; |
c6e89d6c GM |
5486 | { |
5487 | struct frame *f = XFRAME (w->frame); | |
5488 | int window_height_changed_p = 0; | |
5489 | ||
5490 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f GM |
5491 | |
5492 | /* Nil means don't try to resize. */ | |
5493 | if (NILP (Vmax_mini_window_height)) | |
5494 | return 0; | |
c6e89d6c GM |
5495 | |
5496 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
5497 | { | |
5498 | struct it it; | |
dd2eb166 GM |
5499 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
5500 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
5501 | int height, max_height; | |
5502 | int unit = CANON_Y_UNIT (f); | |
5503 | struct text_pos start; | |
9142dd5b | 5504 | |
c6e89d6c | 5505 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 5506 | |
dd2eb166 GM |
5507 | /* Compute the max. number of lines specified by the user. */ |
5508 | if (FLOATP (Vmax_mini_window_height)) | |
5509 | max_height = XFLOATINT (Vmax_mini_window_height) * total_height; | |
5510 | else if (INTEGERP (Vmax_mini_window_height)) | |
5511 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
5512 | else |
5513 | max_height = total_height / 4; | |
dd2eb166 GM |
5514 | |
5515 | /* Correct that max. height if it's bogus. */ | |
5516 | max_height = max (1, max_height); | |
5517 | max_height = min (total_height, max_height); | |
5518 | ||
5519 | /* Find out the height of the text in the window. */ | |
5520 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); | |
5521 | height = (unit - 1 + it.current_y + last_height) / unit; | |
5522 | height = max (1, height); | |
5523 | ||
5524 | /* Compute a suitable window start. */ | |
5525 | if (height > max_height) | |
5526 | { | |
5527 | height = max_height; | |
5528 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
5529 | move_it_vertically_backward (&it, (height - 1) * unit); | |
5530 | start = it.current.pos; | |
5531 | } | |
5532 | else | |
5533 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
5534 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 5535 | |
9472f927 GM |
5536 | /* Let it grow only, until we display an empty message, in which |
5537 | case the window shrinks again. */ | |
da448723 | 5538 | if (height > XFASTINT (w->height)) |
dd2eb166 | 5539 | { |
d2c48e86 | 5540 | int old_height = XFASTINT (w->height); |
da448723 GM |
5541 | freeze_window_starts (f, 1); |
5542 | grow_mini_window (w, height - XFASTINT (w->height)); | |
5543 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
5544 | } | |
5545 | else if (height < XFASTINT (w->height) | |
5546 | && (exact_p || BEGV == ZV)) | |
5547 | { | |
5548 | int old_height = XFASTINT (w->height); | |
5549 | freeze_window_starts (f, 0); | |
5550 | shrink_mini_window (w); | |
d2c48e86 | 5551 | window_height_changed_p = XFASTINT (w->height) != old_height; |
9142dd5b | 5552 | } |
c6e89d6c GM |
5553 | } |
5554 | ||
5555 | return window_height_changed_p; | |
5556 | } | |
5557 | ||
5558 | ||
5559 | /* Value is the current message, a string, or nil if there is no | |
5560 | current message. */ | |
5561 | ||
5562 | Lisp_Object | |
5563 | current_message () | |
5564 | { | |
5565 | Lisp_Object msg; | |
5566 | ||
5567 | if (NILP (echo_area_buffer[0])) | |
5568 | msg = Qnil; | |
5569 | else | |
5570 | { | |
5571 | with_echo_area_buffer (0, 0, (int (*) ()) current_message_1, &msg); | |
5572 | if (NILP (msg)) | |
5573 | echo_area_buffer[0] = Qnil; | |
5574 | } | |
5575 | ||
5576 | return msg; | |
5577 | } | |
5578 | ||
5579 | ||
5580 | static int | |
5581 | current_message_1 (msg) | |
5582 | Lisp_Object *msg; | |
5583 | { | |
5584 | if (Z > BEG) | |
5585 | *msg = make_buffer_string (BEG, Z, 1); | |
5586 | else | |
5587 | *msg = Qnil; | |
5588 | return 0; | |
5589 | } | |
5590 | ||
5591 | ||
5592 | /* Push the current message on Vmessage_stack for later restauration | |
5593 | by restore_message. Value is non-zero if the current message isn't | |
5594 | empty. This is a relatively infrequent operation, so it's not | |
5595 | worth optimizing. */ | |
5596 | ||
5597 | int | |
5598 | push_message () | |
5599 | { | |
5600 | Lisp_Object msg; | |
5601 | msg = current_message (); | |
5602 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
5603 | return STRINGP (msg); | |
5604 | } | |
5605 | ||
5606 | ||
5607 | /* Restore message display from the top of Vmessage_stack. */ | |
5608 | ||
5609 | void | |
5610 | restore_message () | |
5611 | { | |
5612 | Lisp_Object msg; | |
5613 | ||
5614 | xassert (CONSP (Vmessage_stack)); | |
5615 | msg = XCAR (Vmessage_stack); | |
5616 | if (STRINGP (msg)) | |
5617 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
5618 | else | |
5619 | message3_nolog (msg, 0, 0); | |
5620 | } | |
5621 | ||
5622 | ||
5623 | /* Pop the top-most entry off Vmessage_stack. */ | |
5624 | ||
5625 | void | |
5626 | pop_message () | |
5627 | { | |
5628 | xassert (CONSP (Vmessage_stack)); | |
5629 | Vmessage_stack = XCDR (Vmessage_stack); | |
5630 | } | |
5631 | ||
5632 | ||
5633 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
5634 | exits. If the stack is not empty, we have a missing pop_message | |
5635 | somewhere. */ | |
5636 | ||
5637 | void | |
5638 | check_message_stack () | |
5639 | { | |
5640 | if (!NILP (Vmessage_stack)) | |
5641 | abort (); | |
5642 | } | |
5643 | ||
5644 | ||
5645 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
5646 | time we display it---but don't redisplay it now. */ | |
5647 | ||
5648 | void | |
5649 | truncate_echo_area (nchars) | |
5650 | int nchars; | |
5651 | { | |
5652 | if (nchars == 0) | |
5653 | echo_area_buffer[0] = Qnil; | |
5654 | /* A null message buffer means that the frame hasn't really been | |
5655 | initialized yet. Error messages get reported properly by | |
5656 | cmd_error, so this must be just an informative message; toss it. */ | |
5657 | else if (!noninteractive | |
5658 | && INTERACTIVE | |
c6e89d6c | 5659 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
5660 | { |
5661 | struct frame *sf = SELECTED_FRAME (); | |
5662 | if (FRAME_MESSAGE_BUF (sf)) | |
5663 | with_echo_area_buffer (0, 0, (int (*) ()) truncate_message_1, nchars); | |
5664 | } | |
c6e89d6c GM |
5665 | } |
5666 | ||
5667 | ||
5668 | /* Helper function for truncate_echo_area. Truncate the current | |
5669 | message to at most NCHARS characters. */ | |
5670 | ||
5671 | static int | |
5672 | truncate_message_1 (nchars) | |
5673 | int nchars; | |
5674 | { | |
5675 | if (BEG + nchars < Z) | |
5676 | del_range (BEG + nchars, Z); | |
5677 | if (Z == BEG) | |
5678 | echo_area_buffer[0] = Qnil; | |
5679 | return 0; | |
5680 | } | |
5681 | ||
5682 | ||
5683 | /* Set the current message to a substring of S or STRING. | |
5684 | ||
5685 | If STRING is a Lisp string, set the message to the first NBYTES | |
5686 | bytes from STRING. NBYTES zero means use the whole string. If | |
5687 | STRING is multibyte, the message will be displayed multibyte. | |
5688 | ||
5689 | If S is not null, set the message to the first LEN bytes of S. LEN | |
5690 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
5691 | multibyte. Display the message multibyte in that case. */ | |
5692 | ||
5693 | void | |
5694 | set_message (s, string, nbytes, multibyte_p) | |
5695 | char *s; | |
5696 | Lisp_Object string; | |
5697 | int nbytes; | |
5698 | { | |
5699 | message_enable_multibyte | |
5700 | = ((s && multibyte_p) | |
5701 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
5702 | ||
5703 | with_echo_area_buffer (0, -1, (int (*) ()) set_message_1, | |
5704 | s, string, nbytes, multibyte_p); | |
5705 | message_buf_print = 0; | |
5706 | } | |
5707 | ||
5708 | ||
5709 | /* Helper function for set_message. Arguments have the same meaning | |
5710 | as there. This function is called with the echo area buffer being | |
5711 | current. */ | |
5712 | ||
5713 | static int | |
5714 | set_message_1 (s, string, nbytes, multibyte_p) | |
5715 | char *s; | |
5716 | Lisp_Object string; | |
5717 | int nbytes, multibyte_p; | |
5718 | { | |
5719 | xassert (BEG == Z); | |
5720 | ||
5721 | /* Change multibyteness of the echo buffer appropriately. */ | |
5722 | if (message_enable_multibyte | |
5723 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5724 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
5725 | ||
5726 | /* Insert new message at BEG. */ | |
5727 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5728 | ||
5729 | if (STRINGP (string)) | |
5730 | { | |
5731 | int nchars; | |
5732 | ||
5733 | if (nbytes == 0) | |
5734 | nbytes = XSTRING (string)->size_byte; | |
5735 | nchars = string_byte_to_char (string, nbytes); | |
5736 | ||
5737 | /* This function takes care of single/multibyte conversion. We | |
5738 | just have to ensure that the echo area buffer has the right | |
5739 | setting of enable_multibyte_characters. */ | |
5740 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
5741 | } | |
5742 | else if (s) | |
5743 | { | |
5744 | if (nbytes == 0) | |
5745 | nbytes = strlen (s); | |
5746 | ||
5747 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
5748 | { | |
5749 | /* Convert from multi-byte to single-byte. */ | |
5750 | int i, c, n; | |
5751 | unsigned char work[1]; | |
5752 | ||
5753 | /* Convert a multibyte string to single-byte. */ | |
5754 | for (i = 0; i < nbytes; i += n) | |
5755 | { | |
5756 | c = string_char_and_length (s + i, nbytes - i, &n); | |
5757 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
5758 | ? c | |
5759 | : multibyte_char_to_unibyte (c, Qnil)); | |
5760 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5761 | } | |
5762 | } | |
5763 | else if (!multibyte_p | |
5764 | && !NILP (current_buffer->enable_multibyte_characters)) | |
5765 | { | |
5766 | /* Convert from single-byte to multi-byte. */ | |
5767 | int i, c, n; | |
5768 | unsigned char *msg = (unsigned char *) s; | |
5769 | unsigned char *str, work[4]; | |
5770 | ||
5771 | /* Convert a single-byte string to multibyte. */ | |
5772 | for (i = 0; i < nbytes; i++) | |
5773 | { | |
5774 | c = unibyte_char_to_multibyte (msg[i]); | |
5775 | n = CHAR_STRING (c, work, str); | |
5776 | insert_1_both (work, 1, n, 1, 0, 0); | |
5777 | } | |
5778 | } | |
5779 | else | |
5780 | insert_1 (s, nbytes, 1, 0, 0); | |
5781 | } | |
5782 | ||
5783 | return 0; | |
5784 | } | |
5785 | ||
5786 | ||
5787 | /* Clear messages. CURRENT_P non-zero means clear the current | |
5788 | message. LAST_DISPLAYED_P non-zero means clear the message | |
5789 | last displayed. */ | |
5790 | ||
5791 | void | |
5792 | clear_message (current_p, last_displayed_p) | |
5793 | int current_p, last_displayed_p; | |
5794 | { | |
5795 | if (current_p) | |
5796 | echo_area_buffer[0] = Qnil; | |
5797 | ||
5798 | if (last_displayed_p) | |
5799 | echo_area_buffer[1] = Qnil; | |
5800 | ||
5801 | message_buf_print = 0; | |
5802 | } | |
5803 | ||
5804 | /* Clear garbaged frames. | |
5805 | ||
5806 | This function is used where the old redisplay called | |
5807 | redraw_garbaged_frames which in turn called redraw_frame which in | |
5808 | turn called clear_frame. The call to clear_frame was a source of | |
5809 | flickering. I believe a clear_frame is not necessary. It should | |
5810 | suffice in the new redisplay to invalidate all current matrices, | |
5811 | and ensure a complete redisplay of all windows. */ | |
5812 | ||
5813 | static void | |
5814 | clear_garbaged_frames () | |
5815 | { | |
5f5c8ee5 GM |
5816 | if (frame_garbaged) |
5817 | { | |
5f5c8ee5 GM |
5818 | Lisp_Object tail, frame; |
5819 | ||
5820 | FOR_EACH_FRAME (tail, frame) | |
5821 | { | |
5822 | struct frame *f = XFRAME (frame); | |
5823 | ||
5824 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
5825 | { | |
5826 | clear_current_matrices (f); | |
5827 | f->garbaged = 0; | |
5828 | } | |
5829 | } | |
5830 | ||
5831 | frame_garbaged = 0; | |
5832 | ++windows_or_buffers_changed; | |
5833 | } | |
c6e89d6c | 5834 | } |
5f5c8ee5 | 5835 | |
5f5c8ee5 | 5836 | |
886bd6f2 GM |
5837 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
5838 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 5839 | mini-windows height has been changed. */ |
5f5c8ee5 | 5840 | |
c6e89d6c GM |
5841 | static int |
5842 | echo_area_display (update_frame_p) | |
5843 | int update_frame_p; | |
5844 | { | |
5845 | Lisp_Object mini_window; | |
5846 | struct window *w; | |
5847 | struct frame *f; | |
5848 | int window_height_changed_p = 0; | |
886bd6f2 | 5849 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5850 | |
886bd6f2 | 5851 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5852 | w = XWINDOW (mini_window); |
5853 | f = XFRAME (WINDOW_FRAME (w)); | |
5854 | ||
5855 | /* Don't display if frame is invisible or not yet initialized. */ | |
5856 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
5857 | return 0; | |
5f5c8ee5 | 5858 | |
d9e28aa0 RS |
5859 | #if 0 /* inhibit_window_system is not a valid way of testing |
5860 | whether a window system is in use. | |
5861 | This code prevents all echo area display | |
5862 | when you run plain `emacs' on a tty. */ | |
c6e89d6c GM |
5863 | /* When Emacs starts, selected_frame may be a visible terminal |
5864 | frame, even if we run under a window system. If we let this | |
5865 | through, a message would be displayed on the terminal. */ | |
5866 | #ifdef HAVE_WINDOW_SYSTEM | |
886bd6f2 | 5867 | if (!inhibit_window_system && !FRAME_WINDOW_P (sf)) |
c6e89d6c GM |
5868 | return 0; |
5869 | #endif /* HAVE_WINDOW_SYSTEM */ | |
d9e28aa0 | 5870 | #endif |
c6e89d6c GM |
5871 | |
5872 | /* Redraw garbaged frames. */ | |
5873 | if (frame_garbaged) | |
5874 | clear_garbaged_frames (); | |
5875 | ||
5876 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
5877 | { | |
5878 | echo_area_window = mini_window; | |
5879 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 5880 | w->must_be_updated_p = 1; |
c59c668a | 5881 | |
5f5c8ee5 GM |
5882 | if (update_frame_p) |
5883 | { | |
c59c668a GM |
5884 | /* Not called from redisplay_internal. If we changed |
5885 | window configuration, we must redisplay thoroughly. | |
5886 | Otherwise, we can do with updating what we displayed | |
5887 | above. */ | |
5888 | if (window_height_changed_p) | |
5889 | { | |
5890 | ++windows_or_buffers_changed; | |
5891 | ++update_mode_lines; | |
5892 | redisplay_internal (0); | |
5893 | } | |
5894 | else if (FRAME_WINDOW_P (f)) | |
5f5c8ee5 GM |
5895 | { |
5896 | update_single_window (w, 1); | |
5897 | rif->flush_display (f); | |
5898 | } | |
5899 | else | |
5900 | update_frame (f, 1, 1); | |
5901 | } | |
5902 | } | |
5903 | else if (!EQ (mini_window, selected_window)) | |
5904 | windows_or_buffers_changed++; | |
c59c668a GM |
5905 | |
5906 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
5907 | echo_area_buffer[1] = echo_area_buffer[0]; |
5908 | ||
5f5c8ee5 GM |
5909 | /* Prevent redisplay optimization in redisplay_internal by resetting |
5910 | this_line_start_pos. This is done because the mini-buffer now | |
5911 | displays the message instead of its buffer text. */ | |
5912 | if (EQ (mini_window, selected_window)) | |
5913 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
5914 | |
5915 | return window_height_changed_p; | |
5f5c8ee5 GM |
5916 | } |
5917 | ||
5918 | ||
5919 | \f | |
5920 | /*********************************************************************** | |
5921 | Frame Titles | |
5922 | ***********************************************************************/ | |
5923 | ||
5924 | ||
5925 | #ifdef HAVE_WINDOW_SYSTEM | |
5926 | ||
5927 | /* A buffer for constructing frame titles in it; allocated from the | |
5928 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
5929 | ||
5930 | static char *frame_title_buf; | |
5931 | ||
5932 | /* The buffer's end, and a current output position in it. */ | |
5933 | ||
5934 | static char *frame_title_buf_end; | |
5935 | static char *frame_title_ptr; | |
5936 | ||
5937 | ||
5938 | /* Store a single character C for the frame title in frame_title_buf. | |
5939 | Re-allocate frame_title_buf if necessary. */ | |
5940 | ||
5941 | static void | |
5942 | store_frame_title_char (c) | |
5943 | char c; | |
5944 | { | |
5945 | /* If output position has reached the end of the allocated buffer, | |
5946 | double the buffer's size. */ | |
5947 | if (frame_title_ptr == frame_title_buf_end) | |
5948 | { | |
5949 | int len = frame_title_ptr - frame_title_buf; | |
5950 | int new_size = 2 * len * sizeof *frame_title_buf; | |
5951 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
5952 | frame_title_buf_end = frame_title_buf + new_size; | |
5953 | frame_title_ptr = frame_title_buf + len; | |
5954 | } | |
5955 | ||
5956 | *frame_title_ptr++ = c; | |
5957 | } | |
5958 | ||
5959 | ||
5960 | /* Store part of a frame title in frame_title_buf, beginning at | |
5961 | frame_title_ptr. STR is the string to store. Do not copy more | |
5962 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
5963 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
5964 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
5965 | Called from display_mode_element when it is used to build a frame | |
5966 | title. */ | |
5967 | ||
5968 | static int | |
5969 | store_frame_title (str, field_width, precision) | |
5970 | unsigned char *str; | |
5971 | int field_width, precision; | |
5972 | { | |
5973 | int n = 0; | |
5974 | ||
5975 | /* Copy at most PRECISION chars from STR. */ | |
5976 | while ((precision <= 0 || n < precision) | |
5977 | && *str) | |
5978 | { | |
5979 | store_frame_title_char (*str++); | |
5980 | ++n; | |
5981 | } | |
5982 | ||
5983 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
5984 | while (field_width > 0 | |
5985 | && n < field_width) | |
5986 | { | |
5987 | store_frame_title_char (' '); | |
5988 | ++n; | |
5989 | } | |
5990 | ||
5991 | return n; | |
5992 | } | |
5993 | ||
5994 | ||
5995 | /* Set the title of FRAME, if it has changed. The title format is | |
5996 | Vicon_title_format if FRAME is iconified, otherwise it is | |
5997 | frame_title_format. */ | |
5998 | ||
5999 | static void | |
6000 | x_consider_frame_title (frame) | |
6001 | Lisp_Object frame; | |
6002 | { | |
6003 | struct frame *f = XFRAME (frame); | |
6004 | ||
6005 | if (FRAME_WINDOW_P (f) | |
6006 | || FRAME_MINIBUF_ONLY_P (f) | |
6007 | || f->explicit_name) | |
6008 | { | |
6009 | /* Do we have more than one visible frame on this X display? */ | |
6010 | Lisp_Object tail; | |
6011 | Lisp_Object fmt; | |
6012 | struct buffer *obuf; | |
6013 | int len; | |
6014 | struct it it; | |
6015 | ||
9472f927 | 6016 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6017 | { |
9472f927 | 6018 | struct frame *tf = XFRAME (XCAR (tail)); |
5f5c8ee5 GM |
6019 | |
6020 | if (tf != f | |
6021 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
6022 | && !FRAME_MINIBUF_ONLY_P (tf) | |
6023 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
6024 | break; | |
6025 | } | |
6026 | ||
6027 | /* Set global variable indicating that multiple frames exist. */ | |
6028 | multiple_frames = CONSP (tail); | |
6029 | ||
6030 | /* Switch to the buffer of selected window of the frame. Set up | |
6031 | frame_title_ptr so that display_mode_element will output into it; | |
6032 | then display the title. */ | |
6033 | obuf = current_buffer; | |
6034 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
6035 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
6036 | frame_title_ptr = frame_title_buf; | |
6037 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
6038 | NULL, DEFAULT_FACE_ID); | |
6039 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
6040 | frame_title_ptr = NULL; | |
6041 | set_buffer_internal (obuf); | |
6042 | ||
6043 | /* Set the title only if it's changed. This avoids consing in | |
6044 | the common case where it hasn't. (If it turns out that we've | |
6045 | already wasted too much time by walking through the list with | |
6046 | display_mode_element, then we might need to optimize at a | |
6047 | higher level than this.) */ | |
6048 | if (! STRINGP (f->name) | |
6049 | || STRING_BYTES (XSTRING (f->name)) != len | |
6050 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
6051 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
6052 | } | |
6053 | } | |
6054 | ||
6055 | #else /* not HAVE_WINDOW_SYSTEM */ | |
6056 | ||
6057 | #define frame_title_ptr ((char *)0) | |
6058 | #define store_frame_title(str, mincol, maxcol) 0 | |
6059 | ||
6060 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
6061 | ||
6062 | ||
6063 | ||
6064 | \f | |
6065 | /*********************************************************************** | |
6066 | Menu Bars | |
6067 | ***********************************************************************/ | |
6068 | ||
6069 | ||
6070 | /* Prepare for redisplay by updating menu-bar item lists when | |
6071 | appropriate. This can call eval. */ | |
6072 | ||
6073 | void | |
6074 | prepare_menu_bars () | |
6075 | { | |
6076 | int all_windows; | |
6077 | struct gcpro gcpro1, gcpro2; | |
6078 | struct frame *f; | |
6079 | struct frame *tooltip_frame; | |
6080 | ||
6081 | #ifdef HAVE_X_WINDOWS | |
6082 | tooltip_frame = tip_frame; | |
6083 | #else | |
6084 | tooltip_frame = NULL; | |
6085 | #endif | |
6086 | ||
6087 | /* Update all frame titles based on their buffer names, etc. We do | |
6088 | this before the menu bars so that the buffer-menu will show the | |
6089 | up-to-date frame titles. */ | |
6090 | #ifdef HAVE_WINDOW_SYSTEM | |
6091 | if (windows_or_buffers_changed || update_mode_lines) | |
6092 | { | |
6093 | Lisp_Object tail, frame; | |
6094 | ||
6095 | FOR_EACH_FRAME (tail, frame) | |
6096 | { | |
6097 | f = XFRAME (frame); | |
6098 | if (f != tooltip_frame | |
6099 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
6100 | x_consider_frame_title (frame); | |
6101 | } | |
6102 | } | |
6103 | #endif /* HAVE_WINDOW_SYSTEM */ | |
6104 | ||
6105 | /* Update the menu bar item lists, if appropriate. This has to be | |
6106 | done before any actual redisplay or generation of display lines. */ | |
6107 | all_windows = (update_mode_lines | |
6108 | || buffer_shared > 1 | |
6109 | || windows_or_buffers_changed); | |
6110 | if (all_windows) | |
6111 | { | |
6112 | Lisp_Object tail, frame; | |
6113 | int count = specpdl_ptr - specpdl; | |
6114 | ||
6115 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6116 | ||
6117 | FOR_EACH_FRAME (tail, frame) | |
6118 | { | |
6119 | f = XFRAME (frame); | |
6120 | ||
6121 | /* Ignore tooltip frame. */ | |
6122 | if (f == tooltip_frame) | |
6123 | continue; | |
6124 | ||
6125 | /* If a window on this frame changed size, report that to | |
6126 | the user and clear the size-change flag. */ | |
6127 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
6128 | { | |
6129 | Lisp_Object functions; | |
6130 | ||
6131 | /* Clear flag first in case we get an error below. */ | |
6132 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
6133 | functions = Vwindow_size_change_functions; | |
6134 | GCPRO2 (tail, functions); | |
6135 | ||
6136 | while (CONSP (functions)) | |
6137 | { | |
6138 | call1 (XCAR (functions), frame); | |
6139 | functions = XCDR (functions); | |
6140 | } | |
6141 | UNGCPRO; | |
6142 | } | |
6143 | ||
6144 | GCPRO1 (tail); | |
6145 | update_menu_bar (f, 0); | |
6146 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 6147 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
6148 | #endif |
6149 | UNGCPRO; | |
6150 | } | |
6151 | ||
6152 | unbind_to (count, Qnil); | |
6153 | } | |
6154 | else | |
6155 | { | |
886bd6f2 GM |
6156 | struct frame *sf = SELECTED_FRAME (); |
6157 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 6158 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 6159 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
6160 | #endif |
6161 | } | |
6162 | ||
6163 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
6164 | pending_menu_activation is not defined. */ | |
6165 | #ifdef USE_X_TOOLKIT | |
6166 | pending_menu_activation = 0; | |
6167 | #endif | |
6168 | } | |
6169 | ||
6170 | ||
6171 | /* Update the menu bar item list for frame F. This has to be done | |
6172 | before we start to fill in any display lines, because it can call | |
6173 | eval. | |
6174 | ||
6175 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
6176 | ||
6177 | static void | |
6178 | update_menu_bar (f, save_match_data) | |
6179 | struct frame *f; | |
6180 | int save_match_data; | |
6181 | { | |
6182 | Lisp_Object window; | |
6183 | register struct window *w; | |
6184 | ||
6185 | window = FRAME_SELECTED_WINDOW (f); | |
6186 | w = XWINDOW (window); | |
6187 | ||
6188 | if (update_mode_lines) | |
6189 | w->update_mode_line = Qt; | |
6190 | ||
6191 | if (FRAME_WINDOW_P (f) | |
6192 | ? | |
6193 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6194 | FRAME_EXTERNAL_MENU_BAR (f) | |
6195 | #else | |
6196 | FRAME_MENU_BAR_LINES (f) > 0 | |
6197 | #endif | |
6198 | : FRAME_MENU_BAR_LINES (f) > 0) | |
6199 | { | |
6200 | /* If the user has switched buffers or windows, we need to | |
6201 | recompute to reflect the new bindings. But we'll | |
6202 | recompute when update_mode_lines is set too; that means | |
6203 | that people can use force-mode-line-update to request | |
6204 | that the menu bar be recomputed. The adverse effect on | |
6205 | the rest of the redisplay algorithm is about the same as | |
6206 | windows_or_buffers_changed anyway. */ | |
6207 | if (windows_or_buffers_changed | |
6208 | || !NILP (w->update_mode_line) | |
6209 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6210 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6211 | != !NILP (w->last_had_star)) | |
6212 | || ((!NILP (Vtransient_mark_mode) | |
6213 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6214 | != !NILP (w->region_showing))) | |
6215 | { | |
6216 | struct buffer *prev = current_buffer; | |
6217 | int count = specpdl_ptr - specpdl; | |
6218 | ||
6219 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
6220 | if (save_match_data) | |
6221 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6222 | if (NILP (Voverriding_local_map_menu_flag)) | |
6223 | { | |
6224 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6225 | specbind (Qoverriding_local_map, Qnil); | |
6226 | } | |
6227 | ||
6228 | /* Run the Lucid hook. */ | |
6229 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
6230 | ||
6231 | /* If it has changed current-menubar from previous value, | |
6232 | really recompute the menu-bar from the value. */ | |
6233 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
6234 | call0 (Qrecompute_lucid_menubar); | |
6235 | ||
6236 | safe_run_hooks (Qmenu_bar_update_hook); | |
6237 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
6238 | ||
6239 | /* Redisplay the menu bar in case we changed it. */ | |
6240 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6241 | if (FRAME_WINDOW_P (f)) | |
6242 | set_frame_menubar (f, 0, 0); | |
6243 | else | |
6244 | /* On a terminal screen, the menu bar is an ordinary screen | |
6245 | line, and this makes it get updated. */ | |
6246 | w->update_mode_line = Qt; | |
6247 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6248 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
6249 | line, and this makes it get updated. */ | |
6250 | w->update_mode_line = Qt; | |
6251 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6252 | ||
6253 | unbind_to (count, Qnil); | |
6254 | set_buffer_internal_1 (prev); | |
6255 | } | |
6256 | } | |
6257 | } | |
6258 | ||
6259 | ||
6260 | \f | |
6261 | /*********************************************************************** | |
e037b9ec | 6262 | Tool-bars |
5f5c8ee5 GM |
6263 | ***********************************************************************/ |
6264 | ||
6265 | #ifdef HAVE_WINDOW_SYSTEM | |
6266 | ||
e037b9ec | 6267 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
6268 | before we start to fill in any display lines. Called from |
6269 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
6270 | and restore it here. */ | |
6271 | ||
6272 | static void | |
e037b9ec | 6273 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
6274 | struct frame *f; |
6275 | int save_match_data; | |
6276 | { | |
e037b9ec GM |
6277 | if (WINDOWP (f->tool_bar_window) |
6278 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
6279 | { |
6280 | Lisp_Object window; | |
6281 | struct window *w; | |
6282 | ||
6283 | window = FRAME_SELECTED_WINDOW (f); | |
6284 | w = XWINDOW (window); | |
6285 | ||
6286 | /* If the user has switched buffers or windows, we need to | |
6287 | recompute to reflect the new bindings. But we'll | |
6288 | recompute when update_mode_lines is set too; that means | |
6289 | that people can use force-mode-line-update to request | |
6290 | that the menu bar be recomputed. The adverse effect on | |
6291 | the rest of the redisplay algorithm is about the same as | |
6292 | windows_or_buffers_changed anyway. */ | |
6293 | if (windows_or_buffers_changed | |
6294 | || !NILP (w->update_mode_line) | |
6295 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6296 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6297 | != !NILP (w->last_had_star)) | |
6298 | || ((!NILP (Vtransient_mark_mode) | |
6299 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6300 | != !NILP (w->region_showing))) | |
6301 | { | |
6302 | struct buffer *prev = current_buffer; | |
6303 | int count = specpdl_ptr - specpdl; | |
a2889657 | 6304 | |
5f5c8ee5 GM |
6305 | /* Set current_buffer to the buffer of the selected |
6306 | window of the frame, so that we get the right local | |
6307 | keymaps. */ | |
6308 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 6309 | |
5f5c8ee5 GM |
6310 | /* Save match data, if we must. */ |
6311 | if (save_match_data) | |
6312 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6313 | ||
6314 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
6315 | if (NILP (Voverriding_local_map_menu_flag)) | |
6316 | { | |
6317 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6318 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 6319 | } |
1f40cad2 | 6320 | |
e037b9ec GM |
6321 | /* Build desired tool-bar items from keymaps. */ |
6322 | f->desired_tool_bar_items | |
6323 | = tool_bar_items (f->desired_tool_bar_items, | |
6324 | &f->n_desired_tool_bar_items); | |
5f5c8ee5 | 6325 | |
e037b9ec | 6326 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
6327 | w->update_mode_line = Qt; |
6328 | ||
6329 | unbind_to (count, Qnil); | |
6330 | set_buffer_internal_1 (prev); | |
81d478f3 | 6331 | } |
a2889657 JB |
6332 | } |
6333 | } | |
6334 | ||
6c4429a5 | 6335 | |
e037b9ec GM |
6336 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
6337 | F's desired tool-bar contents. F->desired_tool_bar_items must have | |
5f5c8ee5 GM |
6338 | been set up previously by calling prepare_menu_bars. */ |
6339 | ||
a2889657 | 6340 | static void |
e037b9ec | 6341 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 6342 | struct frame *f; |
a2889657 | 6343 | { |
5f5c8ee5 GM |
6344 | int i, size, size_needed, string_idx; |
6345 | struct gcpro gcpro1, gcpro2, gcpro3; | |
6346 | Lisp_Object image, plist, props; | |
a2889657 | 6347 | |
5f5c8ee5 GM |
6348 | image = plist = props = Qnil; |
6349 | GCPRO3 (image, plist, props); | |
a2889657 | 6350 | |
e037b9ec | 6351 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
6352 | Otherwise, make a new string. */ |
6353 | ||
6354 | /* The size of the string we might be able to reuse. */ | |
e037b9ec GM |
6355 | size = (STRINGP (f->desired_tool_bar_string) |
6356 | ? XSTRING (f->desired_tool_bar_string)->size | |
5f5c8ee5 GM |
6357 | : 0); |
6358 | ||
6359 | /* Each image in the string we build is preceded by a space, | |
6360 | and there is a space at the end. */ | |
e037b9ec | 6361 | size_needed = f->n_desired_tool_bar_items + 1; |
5f5c8ee5 | 6362 | |
e037b9ec | 6363 | /* Reuse f->desired_tool_bar_string, if possible. */ |
5f5c8ee5 | 6364 | if (size < size_needed) |
e037b9ec | 6365 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), ' '); |
5f5c8ee5 GM |
6366 | else |
6367 | { | |
6368 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
6369 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 6370 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6371 | } |
a2889657 | 6372 | |
5f5c8ee5 | 6373 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
6374 | put a `menu_item' property on tool-bar items with a value that |
6375 | is the index of the item in F's tool-bar item vector. */ | |
5f5c8ee5 | 6376 | for (i = 0, string_idx = 0; |
e037b9ec | 6377 | i < f->n_desired_tool_bar_items; |
5f5c8ee5 | 6378 | ++i, string_idx += 1) |
a2889657 | 6379 | { |
5f5c8ee5 | 6380 | #define PROP(IDX) \ |
e037b9ec GM |
6381 | (XVECTOR (f->desired_tool_bar_items) \ |
6382 | ->contents[i * TOOL_BAR_ITEM_NSLOTS + (IDX)]) | |
5f5c8ee5 | 6383 | |
e037b9ec GM |
6384 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
6385 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
5f5c8ee5 GM |
6386 | int margin, relief; |
6387 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; | |
6388 | extern Lisp_Object Qlaplace; | |
6389 | ||
6390 | /* If image is a vector, choose the image according to the | |
6391 | button state. */ | |
e037b9ec | 6392 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
6393 | if (VECTORP (image)) |
6394 | { | |
e037b9ec | 6395 | enum tool_bar_item_image idx; |
5f5c8ee5 GM |
6396 | |
6397 | if (enabled_p) | |
6398 | idx = (selected_p | |
e037b9ec GM |
6399 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
6400 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
6401 | else |
6402 | idx = (selected_p | |
e037b9ec GM |
6403 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
6404 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 GM |
6405 | |
6406 | xassert (XVECTOR (image)->size >= idx); | |
6407 | image = XVECTOR (image)->contents[idx]; | |
6408 | } | |
6409 | ||
6410 | /* Ignore invalid image specifications. */ | |
6411 | if (!valid_image_p (image)) | |
6412 | continue; | |
6413 | ||
e037b9ec | 6414 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
6415 | plist = Fcopy_sequence (XCDR (image)); |
6416 | ||
6417 | /* Compute margin and relief to draw. */ | |
e037b9ec GM |
6418 | relief = tool_bar_button_relief > 0 ? tool_bar_button_relief : 3; |
6419 | margin = relief + max (0, tool_bar_button_margin); | |
5f5c8ee5 | 6420 | |
e037b9ec | 6421 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
6422 | { |
6423 | /* Add a `:relief' property to the image spec if the item is | |
6424 | selected. */ | |
6425 | if (selected_p) | |
6426 | { | |
6427 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
6428 | margin -= relief; | |
6429 | } | |
6430 | } | |
6431 | else | |
6432 | { | |
6433 | /* If image is selected, display it pressed, i.e. with a | |
6434 | negative relief. If it's not selected, display it with a | |
6435 | raised relief. */ | |
6436 | plist = Fplist_put (plist, QCrelief, | |
6437 | (selected_p | |
6438 | ? make_number (-relief) | |
6439 | : make_number (relief))); | |
6440 | margin -= relief; | |
6441 | } | |
6442 | ||
6443 | /* Put a margin around the image. */ | |
6444 | if (margin) | |
6445 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
6446 | ||
6447 | /* If button is not enabled, make the image appear disabled by | |
6448 | applying an appropriate algorithm to it. */ | |
6449 | if (!enabled_p) | |
6450 | plist = Fplist_put (plist, QCalgorithm, Qlaplace); | |
6451 | ||
6452 | /* Put a `display' text property on the string for the image to | |
6453 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 6454 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
6455 | vector. */ |
6456 | image = Fcons (Qimage, plist); | |
6457 | props = list4 (Qdisplay, image, | |
e037b9ec | 6458 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)), |
5f5c8ee5 GM |
6459 | Fadd_text_properties (make_number (string_idx), |
6460 | make_number (string_idx + 1), | |
e037b9ec | 6461 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6462 | #undef PROP |
a2889657 JB |
6463 | } |
6464 | ||
5f5c8ee5 GM |
6465 | UNGCPRO; |
6466 | } | |
6467 | ||
6468 | ||
e037b9ec | 6469 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
6470 | |
6471 | static void | |
e037b9ec | 6472 | display_tool_bar_line (it) |
5f5c8ee5 GM |
6473 | struct it *it; |
6474 | { | |
6475 | struct glyph_row *row = it->glyph_row; | |
6476 | int max_x = it->last_visible_x; | |
6477 | struct glyph *last; | |
6478 | ||
6479 | prepare_desired_row (row); | |
6480 | row->y = it->current_y; | |
6481 | ||
6482 | while (it->current_x < max_x) | |
a2889657 | 6483 | { |
5f5c8ee5 | 6484 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 6485 | |
5f5c8ee5 GM |
6486 | /* Get the next display element. */ |
6487 | if (!get_next_display_element (it)) | |
6488 | break; | |
73af359d | 6489 | |
5f5c8ee5 GM |
6490 | /* Produce glyphs. */ |
6491 | x_before = it->current_x; | |
6492 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
6493 | PRODUCE_GLYPHS (it); | |
daa37602 | 6494 | |
5f5c8ee5 GM |
6495 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
6496 | i = 0; | |
6497 | x = x_before; | |
6498 | while (i < nglyphs) | |
6499 | { | |
6500 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
6501 | ||
6502 | if (x + glyph->pixel_width > max_x) | |
6503 | { | |
6504 | /* Glyph doesn't fit on line. */ | |
6505 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
6506 | it->current_x = x; | |
6507 | goto out; | |
6508 | } | |
daa37602 | 6509 | |
5f5c8ee5 GM |
6510 | ++it->hpos; |
6511 | x += glyph->pixel_width; | |
6512 | ++i; | |
6513 | } | |
6514 | ||
6515 | /* Stop at line ends. */ | |
6516 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6517 | break; | |
6518 | ||
6519 | set_iterator_to_next (it); | |
a2889657 | 6520 | } |
a2889657 | 6521 | |
5f5c8ee5 | 6522 | out:; |
a2889657 | 6523 | |
5f5c8ee5 GM |
6524 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
6525 | extend_face_to_end_of_line (it); | |
6526 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
6527 | last->right_box_line_p = 1; | |
6528 | compute_line_metrics (it); | |
6529 | ||
e037b9ec | 6530 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
6531 | if (!row->displays_text_p) |
6532 | { | |
312246d1 GM |
6533 | row->height = row->phys_height = it->last_visible_y - row->y; |
6534 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
6535 | } |
6536 | ||
6537 | row->full_width_p = 1; | |
6538 | row->continued_p = 0; | |
6539 | row->truncated_on_left_p = 0; | |
6540 | row->truncated_on_right_p = 0; | |
6541 | ||
6542 | it->current_x = it->hpos = 0; | |
6543 | it->current_y += row->height; | |
6544 | ++it->vpos; | |
6545 | ++it->glyph_row; | |
a2889657 | 6546 | } |
96a410bc | 6547 | |
5f5c8ee5 | 6548 | |
e037b9ec | 6549 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 6550 | items of frame F visible. */ |
96a410bc | 6551 | |
d39b6696 | 6552 | static int |
e037b9ec | 6553 | tool_bar_lines_needed (f) |
5f5c8ee5 | 6554 | struct frame *f; |
d39b6696 | 6555 | { |
e037b9ec | 6556 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
6557 | struct it it; |
6558 | ||
e037b9ec GM |
6559 | /* Initialize an iterator for iteration over |
6560 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
6561 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
6562 | it.first_visible_x = 0; |
6563 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 6564 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
6565 | |
6566 | while (!ITERATOR_AT_END_P (&it)) | |
6567 | { | |
6568 | it.glyph_row = w->desired_matrix->rows; | |
6569 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 6570 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
6571 | } |
6572 | ||
6573 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 6574 | } |
96a410bc | 6575 | |
5f5c8ee5 | 6576 | |
e037b9ec | 6577 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
6578 | height should be changed. */ |
6579 | ||
6580 | static int | |
e037b9ec | 6581 | redisplay_tool_bar (f) |
5f5c8ee5 | 6582 | struct frame *f; |
96a410bc | 6583 | { |
5f5c8ee5 GM |
6584 | struct window *w; |
6585 | struct it it; | |
6586 | struct glyph_row *row; | |
6587 | int change_height_p = 0; | |
6588 | ||
e037b9ec GM |
6589 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
6590 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 6591 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
6592 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
6593 | if (!WINDOWP (f->tool_bar_window) | |
6594 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
6595 | XFASTINT (w->height) == 0)) |
6596 | return 0; | |
96a410bc | 6597 | |
e037b9ec GM |
6598 | /* Set up an iterator for the tool-bar window. */ |
6599 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
6600 | it.first_visible_x = 0; |
6601 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6602 | row = it.glyph_row; | |
3450d04c | 6603 | |
e037b9ec GM |
6604 | /* Build a string that represents the contents of the tool-bar. */ |
6605 | build_desired_tool_bar_string (f); | |
6606 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 6607 | |
e037b9ec | 6608 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 6609 | while (it.current_y < it.last_visible_y) |
e037b9ec | 6610 | display_tool_bar_line (&it); |
3450d04c | 6611 | |
e037b9ec | 6612 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
6613 | window, so don't do it. */ |
6614 | w->desired_matrix->no_scrolling_p = 1; | |
6615 | w->must_be_updated_p = 1; | |
3450d04c | 6616 | |
e037b9ec | 6617 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
6618 | { |
6619 | int nlines; | |
6620 | ||
6621 | /* If there are blank lines at the end, except for a partially | |
6622 | visible blank line at the end that is smaller than | |
e037b9ec | 6623 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
6624 | row = it.glyph_row - 1; |
6625 | if (!row->displays_text_p | |
6626 | && row->height >= CANON_Y_UNIT (f)) | |
6627 | change_height_p = 1; | |
6628 | ||
e037b9ec GM |
6629 | /* If row displays tool-bar items, but is partially visible, |
6630 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
6631 | if (row->displays_text_p |
6632 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
6633 | change_height_p = 1; | |
6634 | ||
e037b9ec | 6635 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
6636 | frame parameter. */ |
6637 | if (change_height_p | |
e037b9ec | 6638 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
6639 | nlines != XFASTINT (w->height))) |
6640 | { | |
e037b9ec | 6641 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 GM |
6642 | Lisp_Object frame; |
6643 | ||
6644 | XSETFRAME (frame, f); | |
6645 | clear_glyph_matrix (w->desired_matrix); | |
6646 | Fmodify_frame_parameters (frame, | |
e037b9ec | 6647 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
6648 | make_number (nlines)), |
6649 | Qnil)); | |
6650 | fonts_changed_p = 1; | |
6651 | } | |
6652 | } | |
3450d04c | 6653 | |
5f5c8ee5 | 6654 | return change_height_p; |
96a410bc | 6655 | } |
90adcf20 | 6656 | |
5f5c8ee5 | 6657 | |
e037b9ec GM |
6658 | /* Get information about the tool-bar item which is displayed in GLYPH |
6659 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
6660 | properties start in F->current_tool_bar_items. Value is zero if | |
6661 | GLYPH doesn't display a tool-bar item. */ | |
5f5c8ee5 GM |
6662 | |
6663 | int | |
e037b9ec | 6664 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
6665 | struct frame *f; |
6666 | struct glyph *glyph; | |
6667 | int *prop_idx; | |
90adcf20 | 6668 | { |
5f5c8ee5 GM |
6669 | Lisp_Object prop; |
6670 | int success_p; | |
6671 | ||
6672 | /* Get the text property `menu-item' at pos. The value of that | |
6673 | property is the start index of this item's properties in | |
e037b9ec | 6674 | F->current_tool_bar_items. */ |
5f5c8ee5 | 6675 | prop = Fget_text_property (make_number (glyph->charpos), |
e037b9ec | 6676 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
6677 | if (INTEGERP (prop)) |
6678 | { | |
6679 | *prop_idx = XINT (prop); | |
6680 | success_p = 1; | |
6681 | } | |
6682 | else | |
6683 | success_p = 0; | |
90adcf20 | 6684 | |
5f5c8ee5 GM |
6685 | return success_p; |
6686 | } | |
6687 | ||
6688 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 6689 | |
feb0c42f | 6690 | |
5f5c8ee5 GM |
6691 | \f |
6692 | /************************************************************************ | |
6693 | Horizontal scrolling | |
6694 | ************************************************************************/ | |
feb0c42f | 6695 | |
5f5c8ee5 GM |
6696 | static int hscroll_window_tree P_ ((Lisp_Object)); |
6697 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 6698 | |
5f5c8ee5 GM |
6699 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
6700 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
6701 | that it is not within a certain margin at the window's left and | |
6702 | right border. Value is non-zero if any window's hscroll has been | |
6703 | changed. */ | |
6704 | ||
6705 | static int | |
6706 | hscroll_window_tree (window) | |
6707 | Lisp_Object window; | |
6708 | { | |
6709 | int hscrolled_p = 0; | |
6710 | ||
6711 | while (WINDOWP (window)) | |
90adcf20 | 6712 | { |
5f5c8ee5 GM |
6713 | struct window *w = XWINDOW (window); |
6714 | ||
6715 | if (WINDOWP (w->hchild)) | |
6716 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
6717 | else if (WINDOWP (w->vchild)) | |
6718 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
6719 | else if (w->cursor.vpos >= 0) | |
6720 | { | |
6721 | int hscroll_margin, text_area_x, text_area_y; | |
6722 | int text_area_width, text_area_height; | |
92a90e89 GM |
6723 | struct glyph_row *current_cursor_row |
6724 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
6725 | struct glyph_row *desired_cursor_row | |
6726 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
6727 | struct glyph_row *cursor_row | |
6728 | = (desired_cursor_row->enabled_p | |
6729 | ? desired_cursor_row | |
6730 | : current_cursor_row); | |
a2725ab2 | 6731 | |
5f5c8ee5 GM |
6732 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
6733 | &text_area_width, &text_area_height); | |
90adcf20 | 6734 | |
5f5c8ee5 GM |
6735 | /* Scroll when cursor is inside this scroll margin. */ |
6736 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
6737 | ||
6738 | if ((XFASTINT (w->hscroll) | |
6739 | && w->cursor.x < hscroll_margin) | |
92a90e89 GM |
6740 | || (cursor_row->enabled_p |
6741 | && cursor_row->truncated_on_right_p | |
5f5c8ee5 | 6742 | && (w->cursor.x > text_area_width - hscroll_margin))) |
08b610e4 | 6743 | { |
5f5c8ee5 GM |
6744 | struct it it; |
6745 | int hscroll; | |
6746 | struct buffer *saved_current_buffer; | |
6747 | int pt; | |
6748 | ||
6749 | /* Find point in a display of infinite width. */ | |
6750 | saved_current_buffer = current_buffer; | |
6751 | current_buffer = XBUFFER (w->buffer); | |
6752 | ||
6753 | if (w == XWINDOW (selected_window)) | |
6754 | pt = BUF_PT (current_buffer); | |
6755 | else | |
08b610e4 | 6756 | { |
5f5c8ee5 GM |
6757 | pt = marker_position (w->pointm); |
6758 | pt = max (BEGV, pt); | |
6759 | pt = min (ZV, pt); | |
6760 | } | |
6761 | ||
6762 | /* Move iterator to pt starting at cursor_row->start in | |
6763 | a line with infinite width. */ | |
6764 | init_to_row_start (&it, w, cursor_row); | |
6765 | it.last_visible_x = INFINITY; | |
6766 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
6767 | current_buffer = saved_current_buffer; | |
6768 | ||
6769 | /* Center cursor in window. */ | |
6770 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
6771 | / CANON_X_UNIT (it.f)); | |
6772 | ||
6773 | /* Don't call Fset_window_hscroll if value hasn't | |
6774 | changed because it will prevent redisplay | |
6775 | optimizations. */ | |
6776 | if (XFASTINT (w->hscroll) != hscroll) | |
6777 | { | |
6778 | Fset_window_hscroll (window, make_number (hscroll)); | |
6779 | hscrolled_p = 1; | |
08b610e4 | 6780 | } |
08b610e4 | 6781 | } |
08b610e4 | 6782 | } |
a2725ab2 | 6783 | |
5f5c8ee5 | 6784 | window = w->next; |
90adcf20 | 6785 | } |
cd6dfed6 | 6786 | |
5f5c8ee5 GM |
6787 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
6788 | return hscrolled_p; | |
6789 | } | |
6790 | ||
6791 | ||
6792 | /* Set hscroll so that cursor is visible and not inside horizontal | |
6793 | scroll margins for all windows in the tree rooted at WINDOW. See | |
6794 | also hscroll_window_tree above. Value is non-zero if any window's | |
6795 | hscroll has been changed. If it has, desired matrices on the frame | |
6796 | of WINDOW are cleared. */ | |
6797 | ||
6798 | static int | |
6799 | hscroll_windows (window) | |
6800 | Lisp_Object window; | |
6801 | { | |
6802 | int hscrolled_p = hscroll_window_tree (window); | |
6803 | if (hscrolled_p) | |
6804 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
6805 | return hscrolled_p; | |
90adcf20 | 6806 | } |
5f5c8ee5 GM |
6807 | |
6808 | ||
90adcf20 | 6809 | \f |
5f5c8ee5 GM |
6810 | /************************************************************************ |
6811 | Redisplay | |
6812 | ************************************************************************/ | |
6813 | ||
6814 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
6815 | to a non-zero value. This is sometimes handy to have in a debugger | |
6816 | session. */ | |
6817 | ||
6818 | #if GLYPH_DEBUG | |
a2889657 | 6819 | |
5f5c8ee5 GM |
6820 | /* First and last unchanged row for try_window_id. */ |
6821 | ||
6822 | int debug_first_unchanged_at_end_vpos; | |
6823 | int debug_last_unchanged_at_beg_vpos; | |
6824 | ||
6825 | /* Delta vpos and y. */ | |
6826 | ||
6827 | int debug_dvpos, debug_dy; | |
6828 | ||
6829 | /* Delta in characters and bytes for try_window_id. */ | |
6830 | ||
6831 | int debug_delta, debug_delta_bytes; | |
6832 | ||
6833 | /* Values of window_end_pos and window_end_vpos at the end of | |
6834 | try_window_id. */ | |
6835 | ||
6836 | int debug_end_pos, debug_end_vpos; | |
6837 | ||
6838 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
6839 | format string. A1...A9 are a supplement for a variable-length | |
6840 | argument list. If trace_redisplay_p is non-zero also printf the | |
6841 | resulting string to stderr. */ | |
6842 | ||
6843 | static void | |
6844 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
6845 | struct window *w; | |
6846 | char *fmt; | |
6847 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
6848 | { | |
6849 | char buffer[512]; | |
6850 | char *method = w->desired_matrix->method; | |
6851 | int len = strlen (method); | |
6852 | int size = sizeof w->desired_matrix->method; | |
6853 | int remaining = size - len - 1; | |
6854 | ||
6855 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
6856 | if (len && remaining) | |
6857 | { | |
6858 | method[len] = '|'; | |
6859 | --remaining, ++len; | |
6860 | } | |
6861 | ||
6862 | strncpy (method + len, buffer, remaining); | |
6863 | ||
6864 | if (trace_redisplay_p) | |
6865 | fprintf (stderr, "%p (%s): %s\n", | |
6866 | w, | |
6867 | ((BUFFERP (w->buffer) | |
6868 | && STRINGP (XBUFFER (w->buffer)->name)) | |
6869 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
6870 | : "no buffer"), | |
6871 | buffer); | |
6872 | } | |
a2889657 | 6873 | |
5f5c8ee5 | 6874 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 6875 | |
a2889657 | 6876 | |
5f5c8ee5 GM |
6877 | /* This counter is used to clear the face cache every once in a while |
6878 | in redisplay_internal. It is incremented for each redisplay. | |
6879 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
6880 | cleared. */ | |
0d231165 | 6881 | |
5f5c8ee5 | 6882 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
6883 | static int clear_face_cache_count; |
6884 | ||
20de20dc | 6885 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
6886 | |
6887 | static struct frame *previous_terminal_frame; | |
6888 | ||
6889 | /* Non-zero while redisplay_internal is in progress. */ | |
6890 | ||
6891 | int redisplaying_p; | |
6892 | ||
6893 | ||
6894 | /* Value is non-zero if all changes in window W, which displays | |
6895 | current_buffer, are in the text between START and END. START is a | |
6896 | buffer position, END is given as a distance from Z. Used in | |
6897 | redisplay_internal for display optimization. */ | |
6898 | ||
6899 | static INLINE int | |
6900 | text_outside_line_unchanged_p (w, start, end) | |
6901 | struct window *w; | |
6902 | int start, end; | |
6903 | { | |
6904 | int unchanged_p = 1; | |
6905 | ||
6906 | /* If text or overlays have changed, see where. */ | |
6907 | if (XFASTINT (w->last_modified) < MODIFF | |
6908 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
6909 | { | |
6910 | /* Gap in the line? */ | |
6911 | if (GPT < start || Z - GPT < end) | |
6912 | unchanged_p = 0; | |
6913 | ||
6914 | /* Changes start in front of the line, or end after it? */ | |
6915 | if (unchanged_p | |
9142dd5b GM |
6916 | && (BEG_UNCHANGED < start - 1 |
6917 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
6918 | unchanged_p = 0; |
6919 | ||
6920 | /* If selective display, can't optimize if changes start at the | |
6921 | beginning of the line. */ | |
6922 | if (unchanged_p | |
6923 | && INTEGERP (current_buffer->selective_display) | |
6924 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 6925 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 GM |
6926 | unchanged_p = 0; |
6927 | } | |
6928 | ||
6929 | return unchanged_p; | |
6930 | } | |
6931 | ||
6932 | ||
6933 | /* Do a frame update, taking possible shortcuts into account. This is | |
6934 | the main external entry point for redisplay. | |
6935 | ||
6936 | If the last redisplay displayed an echo area message and that message | |
6937 | is no longer requested, we clear the echo area or bring back the | |
6938 | mini-buffer if that is in use. */ | |
20de20dc | 6939 | |
a2889657 JB |
6940 | void |
6941 | redisplay () | |
e9874cee RS |
6942 | { |
6943 | redisplay_internal (0); | |
6944 | } | |
6945 | ||
5f5c8ee5 | 6946 | |
9142dd5b GM |
6947 | /* Reconsider the setting of B->clip_changed which is displayed |
6948 | in window W. */ | |
6949 | ||
6950 | static INLINE void | |
6951 | reconsider_clip_changes (w, b) | |
6952 | struct window *w; | |
6953 | struct buffer *b; | |
6954 | { | |
6955 | if (b->prevent_redisplay_optimizations_p) | |
6956 | b->clip_changed = 1; | |
6957 | else if (b->clip_changed | |
6958 | && !NILP (w->window_end_valid) | |
6959 | && w->current_matrix->buffer == b | |
6960 | && w->current_matrix->zv == BUF_ZV (b) | |
6961 | && w->current_matrix->begv == BUF_BEGV (b)) | |
6962 | b->clip_changed = 0; | |
6963 | } | |
6964 | ||
6965 | ||
5f5c8ee5 GM |
6966 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
6967 | response to any user action; therefore, we should preserve the echo | |
6968 | area. (Actually, our caller does that job.) Perhaps in the future | |
6969 | avoid recentering windows if it is not necessary; currently that | |
6970 | causes some problems. */ | |
e9874cee RS |
6971 | |
6972 | static void | |
6973 | redisplay_internal (preserve_echo_area) | |
6974 | int preserve_echo_area; | |
a2889657 | 6975 | { |
5f5c8ee5 GM |
6976 | struct window *w = XWINDOW (selected_window); |
6977 | struct frame *f = XFRAME (w->frame); | |
6978 | int pause; | |
a2889657 | 6979 | int must_finish = 0; |
5f5c8ee5 | 6980 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 6981 | int number_of_visible_frames; |
28514cd9 | 6982 | int count; |
886bd6f2 | 6983 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 6984 | |
5f5c8ee5 GM |
6985 | /* Non-zero means redisplay has to consider all windows on all |
6986 | frames. Zero means, only selected_window is considered. */ | |
6987 | int consider_all_windows_p; | |
6988 | ||
6989 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
6990 | ||
6991 | /* No redisplay if running in batch mode or frame is not yet fully | |
6992 | initialized, or redisplay is explicitly turned off by setting | |
6993 | Vinhibit_redisplay. */ | |
6994 | if (noninteractive | |
6995 | || !NILP (Vinhibit_redisplay) | |
6996 | || !f->glyphs_initialized_p) | |
a2889657 JB |
6997 | return; |
6998 | ||
5f5c8ee5 GM |
6999 | /* The flag redisplay_performed_directly_p is set by |
7000 | direct_output_for_insert when it already did the whole screen | |
7001 | update necessary. */ | |
7002 | if (redisplay_performed_directly_p) | |
7003 | { | |
7004 | redisplay_performed_directly_p = 0; | |
7005 | if (!hscroll_windows (selected_window)) | |
7006 | return; | |
7007 | } | |
7008 | ||
15f0cf78 RS |
7009 | #ifdef USE_X_TOOLKIT |
7010 | if (popup_activated ()) | |
7011 | return; | |
7012 | #endif | |
7013 | ||
28514cd9 | 7014 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 7015 | if (redisplaying_p) |
735c094c KH |
7016 | return; |
7017 | ||
28514cd9 GM |
7018 | /* Record a function that resets redisplaying_p to its old value |
7019 | when we leave this function. */ | |
7020 | count = specpdl_ptr - specpdl; | |
7021 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); | |
7022 | ++redisplaying_p; | |
7023 | ||
8b32d885 RS |
7024 | retry: |
7025 | ||
9142dd5b GM |
7026 | reconsider_clip_changes (w, current_buffer); |
7027 | ||
5f5c8ee5 GM |
7028 | /* If new fonts have been loaded that make a glyph matrix adjustment |
7029 | necessary, do it. */ | |
7030 | if (fonts_changed_p) | |
7031 | { | |
7032 | adjust_glyphs (NULL); | |
7033 | ++windows_or_buffers_changed; | |
7034 | fonts_changed_p = 0; | |
7035 | } | |
7036 | ||
886bd6f2 GM |
7037 | if (! FRAME_WINDOW_P (sf) |
7038 | && previous_terminal_frame != sf) | |
20de20dc | 7039 | { |
5f5c8ee5 GM |
7040 | /* Since frames on an ASCII terminal share the same display |
7041 | area, displaying a different frame means redisplay the whole | |
7042 | thing. */ | |
20de20dc | 7043 | windows_or_buffers_changed++; |
886bd6f2 GM |
7044 | SET_FRAME_GARBAGED (sf); |
7045 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 7046 | } |
886bd6f2 | 7047 | previous_terminal_frame = sf; |
20de20dc | 7048 | |
5f5c8ee5 GM |
7049 | /* Set the visible flags for all frames. Do this before checking |
7050 | for resized or garbaged frames; they want to know if their frames | |
7051 | are visible. See the comment in frame.h for | |
7052 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 7053 | { |
35f56f96 | 7054 | Lisp_Object tail, frame; |
d724d989 | 7055 | |
89819bdd RS |
7056 | number_of_visible_frames = 0; |
7057 | ||
35f56f96 | 7058 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 7059 | { |
5f5c8ee5 GM |
7060 | struct frame *f = XFRAME (frame); |
7061 | ||
7062 | FRAME_SAMPLE_VISIBILITY (f); | |
7063 | if (FRAME_VISIBLE_P (f)) | |
7064 | ++number_of_visible_frames; | |
7065 | clear_desired_matrices (f); | |
f82aff7c | 7066 | } |
d724d989 JB |
7067 | } |
7068 | ||
44fa5b1e | 7069 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 7070 | do_pending_window_change (1); |
a2889657 | 7071 | |
5f5c8ee5 | 7072 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 7073 | if (frame_garbaged) |
c6e89d6c | 7074 | clear_garbaged_frames (); |
a2889657 | 7075 | |
e037b9ec | 7076 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
7077 | prepare_menu_bars (); |
7078 | ||
28995e67 | 7079 | if (windows_or_buffers_changed) |
a2889657 JB |
7080 | update_mode_lines++; |
7081 | ||
538f13d4 RS |
7082 | /* Detect case that we need to write or remove a star in the mode line. */ |
7083 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
7084 | { |
7085 | w->update_mode_line = Qt; | |
7086 | if (buffer_shared > 1) | |
7087 | update_mode_lines++; | |
7088 | } | |
7089 | ||
5f5c8ee5 | 7090 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
7091 | if (!NILP (w->column_number_displayed) |
7092 | /* This alternative quickly identifies a common case | |
7093 | where no change is needed. */ | |
7094 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7095 | && XFASTINT (w->last_modified) >= MODIFF |
7096 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7097 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7098 | w->update_mode_line = Qt; | |
7099 | ||
44fa5b1e | 7100 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 7101 | |
5f5c8ee5 GM |
7102 | /* The variable buffer_shared is set in redisplay_window and |
7103 | indicates that we redisplay a buffer in different windows. See | |
7104 | there. */ | |
7105 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
7106 | |
7107 | /* If specs for an arrow have changed, do thorough redisplay | |
7108 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 7109 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 7110 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 7111 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 7112 | |
90adcf20 RS |
7113 | /* Normally the message* functions will have already displayed and |
7114 | updated the echo area, but the frame may have been trashed, or | |
7115 | the update may have been preempted, so display the echo area | |
c6e89d6c GM |
7116 | again here. Checking both message buffers captures the case that |
7117 | the echo area should be cleared. */ | |
7118 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
90adcf20 | 7119 | { |
c6e89d6c | 7120 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 7121 | must_finish = 1; |
dd2eb166 | 7122 | |
c6e89d6c GM |
7123 | if (fonts_changed_p) |
7124 | goto retry; | |
7125 | else if (window_height_changed_p) | |
7126 | { | |
7127 | consider_all_windows_p = 1; | |
7128 | ++update_mode_lines; | |
7129 | ++windows_or_buffers_changed; | |
9142dd5b GM |
7130 | |
7131 | /* If window configuration was changed, frames may have been | |
7132 | marked garbaged. Clear them or we will experience | |
7133 | surprises wrt scrolling. */ | |
7134 | if (frame_garbaged) | |
7135 | clear_garbaged_frames (); | |
c6e89d6c | 7136 | } |
90adcf20 | 7137 | } |
dd2eb166 GM |
7138 | else if (w == XWINDOW (minibuf_window) |
7139 | && (current_buffer->clip_changed | |
7140 | || XFASTINT (w->last_modified) < MODIFF | |
7141 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 7142 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
7143 | { |
7144 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
7145 | showing if its contents might have changed. */ |
7146 | must_finish = 1; | |
7147 | consider_all_windows_p = 1; | |
c6e89d6c | 7148 | ++windows_or_buffers_changed; |
dd2eb166 | 7149 | ++update_mode_lines; |
9142dd5b GM |
7150 | |
7151 | /* If window configuration was changed, frames may have been | |
7152 | marked garbaged. Clear them or we will experience | |
7153 | surprises wrt scrolling. */ | |
7154 | if (frame_garbaged) | |
7155 | clear_garbaged_frames (); | |
c6e89d6c GM |
7156 | } |
7157 | ||
90adcf20 | 7158 | |
5f5c8ee5 GM |
7159 | /* If showing the region, and mark has changed, we must redisplay |
7160 | the whole window. The assignment to this_line_start_pos prevents | |
7161 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
7162 | if (((!NILP (Vtransient_mark_mode) |
7163 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7164 | != !NILP (w->region_showing)) | |
82d04750 JB |
7165 | || (!NILP (w->region_showing) |
7166 | && !EQ (w->region_showing, | |
7167 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
7168 | CHARPOS (this_line_start_pos) = 0; |
7169 | ||
7170 | /* Optimize the case that only the line containing the cursor in the | |
7171 | selected window has changed. Variables starting with this_ are | |
7172 | set in display_line and record information about the line | |
7173 | containing the cursor. */ | |
7174 | tlbufpos = this_line_start_pos; | |
7175 | tlendpos = this_line_end_pos; | |
7176 | if (!consider_all_windows_p | |
7177 | && CHARPOS (tlbufpos) > 0 | |
7178 | && NILP (w->update_mode_line) | |
73af359d | 7179 | && !current_buffer->clip_changed |
44fa5b1e | 7180 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 7181 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 7182 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
7183 | && this_line_buffer == current_buffer |
7184 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 7185 | && NILP (w->force_start) |
5f5c8ee5 GM |
7186 | /* Point must be on the line that we have info recorded about. */ |
7187 | && PT >= CHARPOS (tlbufpos) | |
7188 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
7189 | /* All text outside that line, including its final newline, |
7190 | must be unchanged */ | |
5f5c8ee5 GM |
7191 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
7192 | CHARPOS (tlendpos))) | |
7193 | { | |
7194 | if (CHARPOS (tlbufpos) > BEGV | |
7195 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
7196 | && (CHARPOS (tlbufpos) == ZV | |
7197 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
7198 | /* Former continuation line has disappeared by becoming empty */ |
7199 | goto cancel; | |
7200 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 7201 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
7202 | || MINI_WINDOW_P (w)) |
7203 | { | |
1c9241f5 KH |
7204 | /* We have to handle the case of continuation around a |
7205 | wide-column character (See the comment in indent.c around | |
7206 | line 885). | |
7207 | ||
7208 | For instance, in the following case: | |
7209 | ||
7210 | -------- Insert -------- | |
7211 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
7212 | J_I_ ==> J_I_ `^^' are cursors. | |
7213 | ^^ ^^ | |
7214 | -------- -------- | |
7215 | ||
7216 | As we have to redraw the line above, we should goto cancel. */ | |
7217 | ||
5f5c8ee5 GM |
7218 | struct it it; |
7219 | int line_height_before = this_line_pixel_height; | |
7220 | ||
7221 | /* Note that start_display will handle the case that the | |
7222 | line starting at tlbufpos is a continuation lines. */ | |
7223 | start_display (&it, w, tlbufpos); | |
7224 | ||
7225 | /* Implementation note: It this still necessary? */ | |
7226 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
7227 | goto cancel; |
7228 | ||
5f5c8ee5 GM |
7229 | TRACE ((stderr, "trying display optimization 1\n")); |
7230 | w->cursor.vpos = -1; | |
a2889657 | 7231 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
7232 | it.vpos = this_line_vpos; |
7233 | it.current_y = this_line_y; | |
7234 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
7235 | display_line (&it); | |
7236 | ||
a2889657 | 7237 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
7238 | and ends at same distance from eob as before, we win */ |
7239 | if (w->cursor.vpos >= 0 | |
7240 | /* Line is not continued, otherwise this_line_start_pos | |
7241 | would have been set to 0 in display_line. */ | |
7242 | && CHARPOS (this_line_start_pos) | |
7243 | /* Line ends as before. */ | |
7244 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
7245 | /* Line has same height as before. Otherwise other lines | |
7246 | would have to be shifted up or down. */ | |
7247 | && this_line_pixel_height == line_height_before) | |
a2889657 | 7248 | { |
5f5c8ee5 GM |
7249 | /* If this is not the window's last line, we must adjust |
7250 | the charstarts of the lines below. */ | |
7251 | if (it.current_y < it.last_visible_y) | |
7252 | { | |
7253 | struct glyph_row *row | |
7254 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
7255 | int delta, delta_bytes; | |
7256 | ||
7257 | if (Z - CHARPOS (tlendpos) == ZV) | |
7258 | { | |
7259 | /* This line ends at end of (accessible part of) | |
7260 | buffer. There is no newline to count. */ | |
7261 | delta = (Z | |
7262 | - CHARPOS (tlendpos) | |
7263 | - MATRIX_ROW_START_CHARPOS (row)); | |
7264 | delta_bytes = (Z_BYTE | |
7265 | - BYTEPOS (tlendpos) | |
7266 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7267 | } | |
7268 | else | |
7269 | { | |
7270 | /* This line ends in a newline. Must take | |
7271 | account of the newline and the rest of the | |
7272 | text that follows. */ | |
7273 | delta = (Z | |
7274 | - CHARPOS (tlendpos) | |
7275 | - MATRIX_ROW_START_CHARPOS (row)); | |
7276 | delta_bytes = (Z_BYTE | |
7277 | - BYTEPOS (tlendpos) | |
7278 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7279 | } | |
7280 | ||
7281 | increment_glyph_matrix_buffer_positions (w->current_matrix, | |
7282 | this_line_vpos + 1, | |
7283 | w->current_matrix->nrows, | |
7284 | delta, delta_bytes); | |
85bcef6c | 7285 | } |
46db8486 | 7286 | |
5f5c8ee5 GM |
7287 | /* If this row displays text now but previously didn't, |
7288 | or vice versa, w->window_end_vpos may have to be | |
7289 | adjusted. */ | |
7290 | if ((it.glyph_row - 1)->displays_text_p) | |
7291 | { | |
7292 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
7293 | XSETINT (w->window_end_vpos, this_line_vpos); | |
7294 | } | |
7295 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
7296 | && this_line_vpos > 0) | |
7297 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
7298 | w->window_end_valid = Qnil; | |
7299 | ||
7300 | /* Update hint: No need to try to scroll in update_window. */ | |
7301 | w->desired_matrix->no_scrolling_p = 1; | |
7302 | ||
7303 | #if GLYPH_DEBUG | |
7304 | *w->desired_matrix->method = 0; | |
7305 | debug_method_add (w, "optimization 1"); | |
7306 | #endif | |
a2889657 JB |
7307 | goto update; |
7308 | } | |
7309 | else | |
7310 | goto cancel; | |
7311 | } | |
5f5c8ee5 GM |
7312 | else if (/* Cursor position hasn't changed. */ |
7313 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
7314 | /* Make sure the cursor was last displayed |
7315 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
7316 | && 0 <= w->cursor.vpos |
7317 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
7318 | { |
7319 | if (!must_finish) | |
7320 | { | |
c6e89d6c | 7321 | do_pending_window_change (1); |
5f5c8ee5 GM |
7322 | |
7323 | /* We used to always goto end_of_redisplay here, but this | |
7324 | isn't enough if we have a blinking cursor. */ | |
7325 | if (w->cursor_off_p == w->last_cursor_off_p) | |
7326 | goto end_of_redisplay; | |
a2889657 JB |
7327 | } |
7328 | goto update; | |
7329 | } | |
8b51f1e3 KH |
7330 | /* If highlighting the region, or if the cursor is in the echo area, |
7331 | then we can't just move the cursor. */ | |
bd66d1ba RS |
7332 | else if (! (!NILP (Vtransient_mark_mode) |
7333 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
7334 | && (w == XWINDOW (current_buffer->last_selected_window) |
7335 | || highlight_nonselected_windows) | |
8b51f1e3 | 7336 | && NILP (w->region_showing) |
8f897821 | 7337 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 7338 | && !cursor_in_echo_area) |
a2889657 | 7339 | { |
5f5c8ee5 GM |
7340 | struct it it; |
7341 | struct glyph_row *row; | |
7342 | ||
7343 | /* Skip from tlbufpos to PT and see where it is. Note that | |
7344 | PT may be in invisible text. If so, we will end at the | |
7345 | next visible position. */ | |
7346 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
7347 | NULL, DEFAULT_FACE_ID); | |
7348 | it.current_x = this_line_start_x; | |
7349 | it.current_y = this_line_y; | |
7350 | it.vpos = this_line_vpos; | |
7351 | ||
7352 | /* The call to move_it_to stops in front of PT, but | |
7353 | moves over before-strings. */ | |
7354 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
7355 | ||
7356 | if (it.vpos == this_line_vpos | |
7357 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
7358 | row->enabled_p)) | |
a2889657 | 7359 | { |
5f5c8ee5 GM |
7360 | xassert (this_line_vpos == it.vpos); |
7361 | xassert (this_line_y == it.current_y); | |
7362 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
7363 | goto update; |
7364 | } | |
7365 | else | |
7366 | goto cancel; | |
7367 | } | |
5f5c8ee5 | 7368 | |
a2889657 | 7369 | cancel: |
5f5c8ee5 GM |
7370 | /* Text changed drastically or point moved off of line. */ |
7371 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
7372 | } |
7373 | ||
5f5c8ee5 GM |
7374 | CHARPOS (this_line_start_pos) = 0; |
7375 | consider_all_windows_p |= buffer_shared > 1; | |
7376 | ++clear_face_cache_count; | |
a2889657 | 7377 | |
5f5c8ee5 GM |
7378 | |
7379 | /* Build desired matrices. If consider_all_windows_p is non-zero, | |
7380 | do it for all windows on all frames. Otherwise do it for | |
7381 | selected_window, only. */ | |
463f6b91 | 7382 | |
5f5c8ee5 | 7383 | if (consider_all_windows_p) |
a2889657 | 7384 | { |
35f56f96 | 7385 | Lisp_Object tail, frame; |
a2889657 | 7386 | |
5f5c8ee5 GM |
7387 | /* Clear the face cache eventually. */ |
7388 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 7389 | { |
5f5c8ee5 | 7390 | clear_face_cache (0); |
463f6b91 RS |
7391 | clear_face_cache_count = 0; |
7392 | } | |
31b24551 | 7393 | |
5f5c8ee5 GM |
7394 | /* Recompute # windows showing selected buffer. This will be |
7395 | incremented each time such a window is displayed. */ | |
a2889657 JB |
7396 | buffer_shared = 0; |
7397 | ||
35f56f96 | 7398 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 7399 | { |
5f5c8ee5 | 7400 | struct frame *f = XFRAME (frame); |
886bd6f2 | 7401 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 7402 | { |
5f5c8ee5 GM |
7403 | /* Mark all the scroll bars to be removed; we'll redeem |
7404 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
7405 | if (condemn_scroll_bars_hook) |
7406 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 7407 | |
f21ef775 | 7408 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 7409 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 7410 | |
5f5c8ee5 GM |
7411 | /* Any scroll bars which redisplay_windows should have |
7412 | nuked should now go away. */ | |
9769686d RS |
7413 | if (judge_scroll_bars_hook) |
7414 | (*judge_scroll_bars_hook) (f); | |
7415 | } | |
30c566e4 | 7416 | } |
a2889657 | 7417 | } |
886bd6f2 GM |
7418 | else if (FRAME_VISIBLE_P (sf) |
7419 | && !FRAME_OBSCURED_P (sf)) | |
5f5c8ee5 GM |
7420 | redisplay_window (selected_window, 1); |
7421 | ||
7422 | ||
7423 | /* Compare desired and current matrices, perform output. */ | |
7424 | ||
7425 | update: | |
7426 | ||
7427 | /* If fonts changed, display again. */ | |
7428 | if (fonts_changed_p) | |
7429 | goto retry; | |
a2889657 | 7430 | |
a2889657 JB |
7431 | /* Prevent various kinds of signals during display update. |
7432 | stdio is not robust about handling signals, | |
7433 | which can cause an apparent I/O error. */ | |
7434 | if (interrupt_input) | |
7435 | unrequest_sigio (); | |
7436 | stop_polling (); | |
7437 | ||
5f5c8ee5 | 7438 | if (consider_all_windows_p) |
a2889657 JB |
7439 | { |
7440 | Lisp_Object tail; | |
92a90e89 GM |
7441 | struct frame *f; |
7442 | int hscrolled_p; | |
a2889657 JB |
7443 | |
7444 | pause = 0; | |
92a90e89 | 7445 | hscrolled_p = 0; |
a2889657 | 7446 | |
92a90e89 | 7447 | /* See if we have to hscroll. */ |
9472f927 | 7448 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
92a90e89 GM |
7449 | if (FRAMEP (XCAR (tail))) |
7450 | { | |
7451 | f = XFRAME (XCAR (tail)); | |
7452 | ||
7453 | if ((FRAME_WINDOW_P (f) | |
886bd6f2 | 7454 | || f == sf) |
92a90e89 GM |
7455 | && FRAME_VISIBLE_P (f) |
7456 | && !FRAME_OBSCURED_P (f) | |
7457 | && hscroll_windows (f->root_window)) | |
7458 | hscrolled_p = 1; | |
7459 | } | |
7460 | ||
7461 | if (hscrolled_p) | |
7462 | goto retry; | |
a2889657 | 7463 | |
92a90e89 GM |
7464 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
7465 | { | |
9472f927 | 7466 | if (!FRAMEP (XCAR (tail))) |
a2889657 JB |
7467 | continue; |
7468 | ||
9472f927 | 7469 | f = XFRAME (XCAR (tail)); |
1af9f229 | 7470 | |
886bd6f2 | 7471 | if ((FRAME_WINDOW_P (f) || f == sf) |
f21ef775 | 7472 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 7473 | { |
5f5c8ee5 GM |
7474 | /* Mark all windows as to be updated. */ |
7475 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
44fa5b1e | 7476 | pause |= update_frame (f, 0, 0); |
a2889657 | 7477 | if (!pause) |
efc63ef0 RS |
7478 | { |
7479 | mark_window_display_accurate (f->root_window, 1); | |
7480 | if (frame_up_to_date_hook != 0) | |
7481 | (*frame_up_to_date_hook) (f); | |
7482 | } | |
a2889657 JB |
7483 | } |
7484 | } | |
7485 | } | |
7486 | else | |
6e8290aa | 7487 | { |
886bd6f2 GM |
7488 | if (FRAME_VISIBLE_P (sf) |
7489 | && !FRAME_OBSCURED_P (sf)) | |
5f5c8ee5 | 7490 | { |
92a90e89 GM |
7491 | if (hscroll_windows (selected_window)) |
7492 | goto retry; | |
7493 | ||
5f5c8ee5 | 7494 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 7495 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 7496 | } |
4d641a15 KH |
7497 | else |
7498 | pause = 0; | |
d724d989 | 7499 | |
8de2d90b | 7500 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
7501 | function. If the echo area is on another frame, that may |
7502 | have put text on a frame other than the selected one, so the | |
7503 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
7504 | it here. */ |
7505 | { | |
84faf44c | 7506 | Lisp_Object mini_window; |
5f5c8ee5 | 7507 | struct frame *mini_frame; |
84faf44c | 7508 | |
886bd6f2 | 7509 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
84faf44c | 7510 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
8de2d90b | 7511 | |
886bd6f2 | 7512 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
5f5c8ee5 GM |
7513 | { |
7514 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
7515 | pause |= update_frame (mini_frame, 0, 0); | |
7516 | if (!pause && hscroll_windows (mini_window)) | |
7517 | goto retry; | |
7518 | } | |
8de2d90b | 7519 | } |
6e8290aa | 7520 | } |
a2889657 | 7521 | |
5f5c8ee5 GM |
7522 | /* If display was paused because of pending input, make sure we do a |
7523 | thorough update the next time. */ | |
a2889657 JB |
7524 | if (pause) |
7525 | { | |
5f5c8ee5 GM |
7526 | /* Prevent the optimization at the beginning of |
7527 | redisplay_internal that tries a single-line update of the | |
7528 | line containing the cursor in the selected window. */ | |
7529 | CHARPOS (this_line_start_pos) = 0; | |
7530 | ||
7531 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 7532 | if (!NILP (last_arrow_position)) |
a2889657 JB |
7533 | { |
7534 | last_arrow_position = Qt; | |
7535 | last_arrow_string = Qt; | |
7536 | } | |
5f5c8ee5 GM |
7537 | |
7538 | /* If we pause after scrolling, some rows in the current | |
7539 | matrices of some windows are not valid. */ | |
7540 | if (!WINDOW_FULL_WIDTH_P (w) | |
7541 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
7542 | update_mode_lines = 1; |
7543 | } | |
7544 | ||
5f5c8ee5 GM |
7545 | /* Now text on frame agrees with windows, so put info into the |
7546 | windows for partial redisplay to follow. */ | |
a2889657 JB |
7547 | if (!pause) |
7548 | { | |
7549 | register struct buffer *b = XBUFFER (w->buffer); | |
7550 | ||
9142dd5b GM |
7551 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); |
7552 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
7553 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
7554 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
a2889657 | 7555 | |
5f5c8ee5 | 7556 | if (consider_all_windows_p) |
886bd6f2 | 7557 | mark_window_display_accurate (FRAME_ROOT_WINDOW (sf), 1); |
a2889657 JB |
7558 | else |
7559 | { | |
5f5c8ee5 GM |
7560 | XSETFASTINT (w->last_point, BUF_PT (b)); |
7561 | w->last_cursor = w->cursor; | |
7562 | w->last_cursor_off_p = w->cursor_off_p; | |
7563 | ||
28995e67 | 7564 | b->clip_changed = 0; |
9142dd5b | 7565 | b->prevent_redisplay_optimizations_p = 0; |
a2889657 | 7566 | w->update_mode_line = Qnil; |
c2213350 | 7567 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 7568 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
7569 | w->last_had_star |
7570 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7571 | ? Qt : Qnil); | |
3ee4159a RS |
7572 | |
7573 | /* Record if we are showing a region, so can make sure to | |
7574 | update it fully at next redisplay. */ | |
7575 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
7576 | && (w == XWINDOW (current_buffer->last_selected_window) |
7577 | || highlight_nonselected_windows) | |
3ee4159a RS |
7578 | && !NILP (XBUFFER (w->buffer)->mark_active) |
7579 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
7580 | : Qnil); | |
7581 | ||
d2f84654 | 7582 | w->window_end_valid = w->buffer; |
d45de95b | 7583 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 7584 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 | 7585 | if (frame_up_to_date_hook != 0) |
886bd6f2 | 7586 | (*frame_up_to_date_hook) (sf); |
9142dd5b GM |
7587 | |
7588 | w->current_matrix->buffer = b; | |
7589 | w->current_matrix->begv = BUF_BEGV (b); | |
7590 | w->current_matrix->zv = BUF_ZV (b); | |
a2889657 | 7591 | } |
5f5c8ee5 | 7592 | |
a2889657 JB |
7593 | update_mode_lines = 0; |
7594 | windows_or_buffers_changed = 0; | |
7595 | } | |
7596 | ||
5f5c8ee5 GM |
7597 | /* Start SIGIO interrupts coming again. Having them off during the |
7598 | code above makes it less likely one will discard output, but not | |
7599 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 7600 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
7601 | if (interrupt_input) |
7602 | request_sigio (); | |
7603 | start_polling (); | |
7604 | ||
5f5c8ee5 GM |
7605 | /* If a frame has become visible which was not before, redisplay |
7606 | again, so that we display it. Expose events for such a frame | |
7607 | (which it gets when becoming visible) don't call the parts of | |
7608 | redisplay constructing glyphs, so simply exposing a frame won't | |
7609 | display anything in this case. So, we have to display these | |
7610 | frames here explicitly. */ | |
11c52c4f RS |
7611 | if (!pause) |
7612 | { | |
7613 | Lisp_Object tail, frame; | |
7614 | int new_count = 0; | |
7615 | ||
7616 | FOR_EACH_FRAME (tail, frame) | |
7617 | { | |
7618 | int this_is_visible = 0; | |
8e83f802 RS |
7619 | |
7620 | if (XFRAME (frame)->visible) | |
7621 | this_is_visible = 1; | |
7622 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
7623 | if (XFRAME (frame)->visible) | |
7624 | this_is_visible = 1; | |
11c52c4f RS |
7625 | |
7626 | if (this_is_visible) | |
7627 | new_count++; | |
7628 | } | |
7629 | ||
89819bdd | 7630 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
7631 | windows_or_buffers_changed++; |
7632 | } | |
7633 | ||
44fa5b1e | 7634 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 7635 | do_pending_window_change (1); |
d8e242fd | 7636 | |
8b32d885 RS |
7637 | /* If we just did a pending size change, or have additional |
7638 | visible frames, redisplay again. */ | |
3c8c72e0 | 7639 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 7640 | goto retry; |
5f5c8ee5 GM |
7641 | |
7642 | end_of_redisplay:; | |
c6e89d6c | 7643 | |
28514cd9 | 7644 | unbind_to (count, Qnil); |
a2889657 JB |
7645 | } |
7646 | ||
5f5c8ee5 GM |
7647 | |
7648 | /* Redisplay, but leave alone any recent echo area message unless | |
7649 | another message has been requested in its place. | |
a2889657 JB |
7650 | |
7651 | This is useful in situations where you need to redisplay but no | |
7652 | user action has occurred, making it inappropriate for the message | |
7653 | area to be cleared. See tracking_off and | |
7654 | wait_reading_process_input for examples of these situations. */ | |
7655 | ||
8991bb31 | 7656 | void |
a2889657 JB |
7657 | redisplay_preserve_echo_area () |
7658 | { | |
c6e89d6c | 7659 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 7660 | { |
c6e89d6c GM |
7661 | /* We have a previously displayed message, but no current |
7662 | message. Redisplay the previous message. */ | |
7663 | display_last_displayed_message_p = 1; | |
e9874cee | 7664 | redisplay_internal (1); |
c6e89d6c | 7665 | display_last_displayed_message_p = 0; |
a2889657 JB |
7666 | } |
7667 | else | |
e9874cee | 7668 | redisplay_internal (1); |
a2889657 JB |
7669 | } |
7670 | ||
5f5c8ee5 | 7671 | |
28514cd9 GM |
7672 | /* Function registered with record_unwind_protect in |
7673 | redisplay_internal. Clears the flag indicating that a redisplay is | |
7674 | in progress. */ | |
7675 | ||
7676 | static Lisp_Object | |
7677 | unwind_redisplay (old_redisplaying_p) | |
7678 | Lisp_Object old_redisplaying_p; | |
7679 | { | |
7680 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 7681 | return Qnil; |
28514cd9 GM |
7682 | } |
7683 | ||
7684 | ||
5f5c8ee5 GM |
7685 | /* Mark the display of windows in the window tree rooted at WINDOW as |
7686 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
7687 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
7688 | the next time redisplay_internal is called. */ | |
7689 | ||
a2889657 | 7690 | void |
5f5c8ee5 | 7691 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 7692 | Lisp_Object window; |
5f5c8ee5 | 7693 | int accurate_p; |
a2889657 | 7694 | { |
5f5c8ee5 GM |
7695 | struct window *w; |
7696 | ||
7697 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
7698 | { |
7699 | w = XWINDOW (window); | |
7700 | ||
5f5c8ee5 | 7701 | if (BUFFERP (w->buffer)) |
bd66d1ba | 7702 | { |
5f5c8ee5 GM |
7703 | struct buffer *b = XBUFFER (w->buffer); |
7704 | ||
c2213350 | 7705 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 7706 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 7707 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
7708 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
7709 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
7710 | ? Qt : Qnil); | |
bd66d1ba | 7711 | |
5f5c8ee5 GM |
7712 | #if 0 /* I don't think this is necessary because display_line does it. |
7713 | Let's check it. */ | |
bd66d1ba RS |
7714 | /* Record if we are showing a region, so can make sure to |
7715 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
7716 | w->region_showing |
7717 | = (!NILP (Vtransient_mark_mode) | |
7718 | && (w == XWINDOW (current_buffer->last_selected_window) | |
7719 | || highlight_nonselected_windows) | |
7720 | && (!NILP (b->mark_active) | |
7721 | ? Fmarker_position (b->mark) | |
7722 | : Qnil)); | |
7723 | #endif | |
7724 | ||
7725 | if (accurate_p) | |
7726 | { | |
7727 | b->clip_changed = 0; | |
9142dd5b GM |
7728 | b->prevent_redisplay_optimizations_p = 0; |
7729 | w->current_matrix->buffer = b; | |
7730 | w->current_matrix->begv = BUF_BEGV (b); | |
7731 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 GM |
7732 | w->last_cursor = w->cursor; |
7733 | w->last_cursor_off_p = w->cursor_off_p; | |
7734 | if (w == XWINDOW (selected_window)) | |
7735 | w->last_point = BUF_PT (b); | |
7736 | else | |
7737 | w->last_point = XMARKER (w->pointm)->charpos; | |
7738 | } | |
bd66d1ba RS |
7739 | } |
7740 | ||
d2f84654 | 7741 | w->window_end_valid = w->buffer; |
a2889657 JB |
7742 | w->update_mode_line = Qnil; |
7743 | ||
265a9e55 | 7744 | if (!NILP (w->vchild)) |
5f5c8ee5 | 7745 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 7746 | if (!NILP (w->hchild)) |
5f5c8ee5 | 7747 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
7748 | } |
7749 | ||
5f5c8ee5 | 7750 | if (accurate_p) |
a2889657 | 7751 | { |
d45de95b | 7752 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
7753 | last_arrow_string = Voverlay_arrow_string; |
7754 | } | |
7755 | else | |
7756 | { | |
5f5c8ee5 GM |
7757 | /* Force a thorough redisplay the next time by setting |
7758 | last_arrow_position and last_arrow_string to t, which is | |
7759 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
7760 | last_arrow_position = Qt; |
7761 | last_arrow_string = Qt; | |
7762 | } | |
7763 | } | |
5f5c8ee5 GM |
7764 | |
7765 | ||
7766 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
7767 | C. Since a display table doesn't have any parent, we don't have to | |
7768 | follow parent. Do not call this function directly but use the | |
7769 | macro DISP_CHAR_VECTOR. */ | |
7770 | ||
7771 | Lisp_Object | |
7772 | disp_char_vector (dp, c) | |
7773 | struct Lisp_Char_Table *dp; | |
7774 | int c; | |
7775 | { | |
7776 | int code[4], i; | |
7777 | Lisp_Object val; | |
7778 | ||
7779 | if (SINGLE_BYTE_CHAR_P (c)) | |
7780 | return (dp->contents[c]); | |
7781 | ||
7782 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
7783 | if (code[0] != CHARSET_COMPOSITION) | |
7784 | { | |
7785 | if (code[1] < 32) | |
7786 | code[1] = -1; | |
7787 | else if (code[2] < 32) | |
7788 | code[2] = -1; | |
7789 | } | |
7790 | ||
7791 | /* Here, the possible range of code[0] (== charset ID) is | |
7792 | 128..max_charset. Since the top level char table contains data | |
7793 | for multibyte characters after 256th element, we must increment | |
7794 | code[0] by 128 to get a correct index. */ | |
7795 | code[0] += 128; | |
7796 | code[3] = -1; /* anchor */ | |
7797 | ||
7798 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
7799 | { | |
7800 | val = dp->contents[code[i]]; | |
7801 | if (!SUB_CHAR_TABLE_P (val)) | |
7802 | return (NILP (val) ? dp->defalt : val); | |
7803 | } | |
7804 | ||
7805 | /* Here, val is a sub char table. We return the default value of | |
7806 | it. */ | |
7807 | return (dp->defalt); | |
7808 | } | |
7809 | ||
7810 | ||
a2889657 | 7811 | \f |
5f5c8ee5 GM |
7812 | /*********************************************************************** |
7813 | Window Redisplay | |
7814 | ***********************************************************************/ | |
a2725ab2 | 7815 | |
5f5c8ee5 | 7816 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
7817 | |
7818 | static void | |
5f5c8ee5 GM |
7819 | redisplay_windows (window) |
7820 | Lisp_Object window; | |
90adcf20 | 7821 | { |
5f5c8ee5 GM |
7822 | while (!NILP (window)) |
7823 | { | |
7824 | struct window *w = XWINDOW (window); | |
7825 | ||
7826 | if (!NILP (w->hchild)) | |
7827 | redisplay_windows (w->hchild); | |
7828 | else if (!NILP (w->vchild)) | |
7829 | redisplay_windows (w->vchild); | |
7830 | else | |
7831 | redisplay_window (window, 0); | |
a2725ab2 | 7832 | |
5f5c8ee5 GM |
7833 | window = w->next; |
7834 | } | |
7835 | } | |
7836 | ||
7837 | ||
7838 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
7839 | DELTA is the number of bytes by which positions recorded in ROW | |
7840 | differ from current buffer positions. */ | |
7841 | ||
7842 | void | |
7843 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
7844 | struct window *w; | |
7845 | struct glyph_row *row; | |
7846 | struct glyph_matrix *matrix; | |
7847 | int delta, delta_bytes, dy, dvpos; | |
7848 | { | |
7849 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
7850 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
7851 | int x = row->x; | |
7852 | int pt_old = PT - delta; | |
7853 | ||
7854 | /* Skip over glyphs not having an object at the start of the row. | |
7855 | These are special glyphs like truncation marks on terminal | |
7856 | frames. */ | |
7857 | if (row->displays_text_p) | |
7858 | while (glyph < end | |
7859 | && !glyph->object | |
7860 | && glyph->charpos < 0) | |
7861 | { | |
7862 | x += glyph->pixel_width; | |
7863 | ++glyph; | |
7864 | } | |
7865 | ||
7866 | while (glyph < end | |
7867 | && glyph->object | |
7868 | && (!BUFFERP (glyph->object) | |
7869 | || glyph->charpos < pt_old)) | |
7870 | { | |
7871 | x += glyph->pixel_width; | |
7872 | ++glyph; | |
7873 | } | |
7874 | ||
7875 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
7876 | w->cursor.x = x; | |
7877 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
7878 | w->cursor.y = row->y + dy; | |
7879 | ||
7880 | if (w == XWINDOW (selected_window)) | |
7881 | { | |
7882 | if (!row->continued_p | |
7883 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
7884 | && row->x == 0) | |
7885 | { | |
7886 | this_line_buffer = XBUFFER (w->buffer); | |
7887 | ||
7888 | CHARPOS (this_line_start_pos) | |
7889 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
7890 | BYTEPOS (this_line_start_pos) | |
7891 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
7892 | ||
7893 | CHARPOS (this_line_end_pos) | |
7894 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
7895 | BYTEPOS (this_line_end_pos) | |
7896 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
7897 | ||
7898 | this_line_y = w->cursor.y; | |
7899 | this_line_pixel_height = row->height; | |
7900 | this_line_vpos = w->cursor.vpos; | |
7901 | this_line_start_x = row->x; | |
7902 | } | |
7903 | else | |
7904 | CHARPOS (this_line_start_pos) = 0; | |
7905 | } | |
7906 | } | |
7907 | ||
7908 | ||
7909 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
7910 | start STARTP. Sets the window start of WINDOW to that position. |
7911 | ||
7912 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
7913 | |
7914 | static INLINE struct text_pos | |
7915 | run_window_scroll_functions (window, startp) | |
7916 | Lisp_Object window; | |
7917 | struct text_pos startp; | |
7918 | { | |
7919 | struct window *w = XWINDOW (window); | |
7920 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
7921 | |
7922 | if (current_buffer != XBUFFER (w->buffer)) | |
7923 | abort (); | |
7924 | ||
5f5c8ee5 GM |
7925 | if (!NILP (Vwindow_scroll_functions)) |
7926 | { | |
7927 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
7928 | make_number (CHARPOS (startp))); | |
7929 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
7930 | /* In case the hook functions switch buffers. */ |
7931 | if (current_buffer != XBUFFER (w->buffer)) | |
7932 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 7933 | } |
90adcf20 | 7934 | |
5f5c8ee5 GM |
7935 | return startp; |
7936 | } | |
7937 | ||
7938 | ||
7939 | /* Modify the desired matrix of window W and W->vscroll so that the | |
7940 | line containing the cursor is fully visible. */ | |
7941 | ||
7942 | static void | |
7943 | make_cursor_line_fully_visible (w) | |
7944 | struct window *w; | |
7945 | { | |
7946 | struct glyph_matrix *matrix; | |
7947 | struct glyph_row *row; | |
045dee35 | 7948 | int header_line_height; |
5f5c8ee5 GM |
7949 | |
7950 | /* It's not always possible to find the cursor, e.g, when a window | |
7951 | is full of overlay strings. Don't do anything in that case. */ | |
7952 | if (w->cursor.vpos < 0) | |
7953 | return; | |
7954 | ||
7955 | matrix = w->desired_matrix; | |
7956 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
7957 | ||
7958 | /* If row->y == top y of window display area, the window isn't tall | |
7959 | enough to display a single line. There is nothing we can do | |
7960 | about it. */ | |
045dee35 GM |
7961 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
7962 | if (row->y == header_line_height) | |
5f5c8ee5 GM |
7963 | return; |
7964 | ||
7965 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
7966 | { | |
7967 | int dy = row->height - row->visible_height; | |
7968 | w->vscroll = 0; | |
7969 | w->cursor.y += dy; | |
7970 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7971 | } | |
7972 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) | |
7973 | { | |
7974 | int dy = - (row->height - row->visible_height); | |
7975 | w->vscroll = dy; | |
7976 | w->cursor.y += dy; | |
7977 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
7978 | } | |
7979 | ||
7980 | /* When we change the cursor y-position of the selected window, | |
7981 | change this_line_y as well so that the display optimization for | |
7982 | the cursor line of the selected window in redisplay_internal uses | |
7983 | the correct y-position. */ | |
7984 | if (w == XWINDOW (selected_window)) | |
7985 | this_line_y = w->cursor.y; | |
7986 | } | |
7987 | ||
7988 | ||
7989 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
7990 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
7991 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
7992 | in redisplay_window to bring a partially visible line into view in | |
7993 | the case that only the cursor has moved. | |
7994 | ||
7995 | Value is | |
7996 | ||
7997 | 1 if scrolling succeeded | |
7998 | ||
7999 | 0 if scrolling didn't find point. | |
8000 | ||
8001 | -1 if new fonts have been loaded so that we must interrupt | |
8002 | redisplay, adjust glyph matrices, and try again. */ | |
8003 | ||
8004 | static int | |
8005 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
8006 | scroll_step, temp_scroll_step) | |
8007 | Lisp_Object window; | |
8008 | int just_this_one_p; | |
8009 | int scroll_conservatively, scroll_step; | |
8010 | int temp_scroll_step; | |
8011 | { | |
8012 | struct window *w = XWINDOW (window); | |
8013 | struct frame *f = XFRAME (w->frame); | |
8014 | struct text_pos scroll_margin_pos; | |
8015 | struct text_pos pos; | |
8016 | struct text_pos startp; | |
8017 | struct it it; | |
8018 | Lisp_Object window_end; | |
8019 | int this_scroll_margin; | |
8020 | int dy = 0; | |
8021 | int scroll_max; | |
8022 | int line_height, rc; | |
8023 | int amount_to_scroll = 0; | |
8024 | Lisp_Object aggressive; | |
8025 | int height; | |
8026 | ||
8027 | #if GLYPH_DEBUG | |
8028 | debug_method_add (w, "try_scrolling"); | |
78614721 | 8029 | #endif |
5f5c8ee5 GM |
8030 | |
8031 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
8032 | ||
8033 | /* Compute scroll margin height in pixels. We scroll when point is | |
8034 | within this distance from the top or bottom of the window. */ | |
8035 | if (scroll_margin > 0) | |
90adcf20 | 8036 | { |
5f5c8ee5 GM |
8037 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
8038 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8039 | } | |
8040 | else | |
8041 | this_scroll_margin = 0; | |
8042 | ||
8043 | /* Compute how much we should try to scroll maximally to bring point | |
8044 | into view. */ | |
8045 | if (scroll_step) | |
8046 | scroll_max = scroll_step; | |
8047 | else if (scroll_conservatively) | |
8048 | scroll_max = scroll_conservatively; | |
8049 | else if (temp_scroll_step) | |
8050 | scroll_max = temp_scroll_step; | |
8051 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
8052 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
8053 | /* We're trying to scroll because of aggressive scrolling | |
8054 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
8055 | there should be a variable for this. */ | |
8056 | scroll_max = 10; | |
8057 | else | |
8058 | scroll_max = 0; | |
8059 | scroll_max *= CANON_Y_UNIT (f); | |
8060 | ||
8061 | /* Decide whether we have to scroll down. Start at the window end | |
8062 | and move this_scroll_margin up to find the position of the scroll | |
8063 | margin. */ | |
8064 | window_end = Fwindow_end (window, Qt); | |
8065 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
8066 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
8067 | if (this_scroll_margin) | |
8068 | { | |
8069 | start_display (&it, w, scroll_margin_pos); | |
8070 | move_it_vertically (&it, - this_scroll_margin); | |
8071 | scroll_margin_pos = it.current.pos; | |
8072 | } | |
8073 | ||
8074 | if (PT >= CHARPOS (scroll_margin_pos)) | |
8075 | { | |
8076 | int y0; | |
8077 | ||
8078 | /* Point is in the scroll margin at the bottom of the window, or | |
8079 | below. Compute a new window start that makes point visible. */ | |
8080 | ||
8081 | /* Compute the distance from the scroll margin to PT. | |
8082 | Give up if the distance is greater than scroll_max. */ | |
8083 | start_display (&it, w, scroll_margin_pos); | |
8084 | y0 = it.current_y; | |
8085 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8086 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8087 | line_height = (it.max_ascent + it.max_descent | |
8088 | ? it.max_ascent + it.max_descent | |
8089 | : last_height); | |
8090 | dy = it.current_y + line_height - y0; | |
8091 | if (dy > scroll_max) | |
8092 | return 0; | |
8093 | ||
8094 | /* Move the window start down. If scrolling conservatively, | |
8095 | move it just enough down to make point visible. If | |
8096 | scroll_step is set, move it down by scroll_step. */ | |
8097 | start_display (&it, w, startp); | |
8098 | ||
8099 | if (scroll_conservatively) | |
8100 | amount_to_scroll = dy; | |
8101 | else if (scroll_step || temp_scroll_step) | |
8102 | amount_to_scroll = scroll_max; | |
8103 | else | |
90adcf20 | 8104 | { |
5f5c8ee5 GM |
8105 | aggressive = current_buffer->scroll_down_aggressively; |
8106 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8107 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8108 | if (NUMBERP (aggressive)) |
8109 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8110 | } | |
a2725ab2 | 8111 | |
5f5c8ee5 GM |
8112 | if (amount_to_scroll <= 0) |
8113 | return 0; | |
a2725ab2 | 8114 | |
5f5c8ee5 GM |
8115 | move_it_vertically (&it, amount_to_scroll); |
8116 | startp = it.current.pos; | |
8117 | } | |
8118 | else | |
8119 | { | |
8120 | /* See if point is inside the scroll margin at the top of the | |
8121 | window. */ | |
8122 | scroll_margin_pos = startp; | |
8123 | if (this_scroll_margin) | |
8124 | { | |
8125 | start_display (&it, w, startp); | |
8126 | move_it_vertically (&it, this_scroll_margin); | |
8127 | scroll_margin_pos = it.current.pos; | |
8128 | } | |
8129 | ||
8130 | if (PT < CHARPOS (scroll_margin_pos)) | |
8131 | { | |
8132 | /* Point is in the scroll margin at the top of the window or | |
8133 | above what is displayed in the window. */ | |
8134 | int y0; | |
8135 | ||
8136 | /* Compute the vertical distance from PT to the scroll | |
8137 | margin position. Give up if distance is greater than | |
8138 | scroll_max. */ | |
8139 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
8140 | start_display (&it, w, pos); | |
8141 | y0 = it.current_y; | |
8142 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
8143 | it.last_visible_y, -1, | |
8144 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8145 | dy = it.current_y - y0; | |
8146 | if (dy > scroll_max) | |
8147 | return 0; | |
8148 | ||
8149 | /* Compute new window start. */ | |
8150 | start_display (&it, w, startp); | |
8151 | ||
8152 | if (scroll_conservatively) | |
8153 | amount_to_scroll = dy; | |
8154 | else if (scroll_step || temp_scroll_step) | |
8155 | amount_to_scroll = scroll_max; | |
538f13d4 | 8156 | else |
5f5c8ee5 GM |
8157 | { |
8158 | aggressive = current_buffer->scroll_up_aggressively; | |
8159 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8160 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8161 | if (NUMBERP (aggressive)) |
8162 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8163 | } | |
a2725ab2 | 8164 | |
5f5c8ee5 GM |
8165 | if (amount_to_scroll <= 0) |
8166 | return 0; | |
8167 | ||
8168 | move_it_vertically (&it, - amount_to_scroll); | |
8169 | startp = it.current.pos; | |
90adcf20 RS |
8170 | } |
8171 | } | |
a2889657 | 8172 | |
5f5c8ee5 GM |
8173 | /* Run window scroll functions. */ |
8174 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 8175 | |
5f5c8ee5 GM |
8176 | /* Display the window. Give up if new fonts are loaded, or if point |
8177 | doesn't appear. */ | |
8178 | if (!try_window (window, startp)) | |
8179 | rc = -1; | |
8180 | else if (w->cursor.vpos < 0) | |
8181 | { | |
8182 | clear_glyph_matrix (w->desired_matrix); | |
8183 | rc = 0; | |
8184 | } | |
8185 | else | |
8186 | { | |
8187 | /* Maybe forget recorded base line for line number display. */ | |
8188 | if (!just_this_one_p | |
8189 | || current_buffer->clip_changed | |
9142dd5b | 8190 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
8191 | w->base_line_number = Qnil; |
8192 | ||
8193 | /* If cursor ends up on a partially visible line, shift display | |
8194 | lines up or down. */ | |
8195 | make_cursor_line_fully_visible (w); | |
8196 | rc = 1; | |
8197 | } | |
8198 | ||
8199 | return rc; | |
a2889657 JB |
8200 | } |
8201 | ||
5f5c8ee5 GM |
8202 | |
8203 | /* Compute a suitable window start for window W if display of W starts | |
8204 | on a continuation line. Value is non-zero if a new window start | |
8205 | was computed. | |
8206 | ||
8207 | The new window start will be computed, based on W's width, starting | |
8208 | from the start of the continued line. It is the start of the | |
8209 | screen line with the minimum distance from the old start W->start. */ | |
8210 | ||
8211 | static int | |
8212 | compute_window_start_on_continuation_line (w) | |
8213 | struct window *w; | |
1f1ff51d | 8214 | { |
5f5c8ee5 GM |
8215 | struct text_pos pos, start_pos; |
8216 | int window_start_changed_p = 0; | |
1f1ff51d | 8217 | |
5f5c8ee5 | 8218 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 8219 | |
5f5c8ee5 GM |
8220 | /* If window start is on a continuation line... Window start may be |
8221 | < BEGV in case there's invisible text at the start of the | |
8222 | buffer (M-x rmail, for example). */ | |
8223 | if (CHARPOS (start_pos) > BEGV | |
8224 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 8225 | { |
5f5c8ee5 GM |
8226 | struct it it; |
8227 | struct glyph_row *row; | |
f3751a65 GM |
8228 | |
8229 | /* Handle the case that the window start is out of range. */ | |
8230 | if (CHARPOS (start_pos) < BEGV) | |
8231 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
8232 | else if (CHARPOS (start_pos) > ZV) | |
8233 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
8234 | |
8235 | /* Find the start of the continued line. This should be fast | |
8236 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 8237 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
8238 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
8239 | row, DEFAULT_FACE_ID); | |
8240 | reseat_at_previous_visible_line_start (&it); | |
8241 | ||
8242 | /* If the line start is "too far" away from the window start, | |
8243 | say it takes too much time to compute a new window start. */ | |
8244 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
8245 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
8246 | { | |
8247 | int min_distance, distance; | |
8248 | ||
8249 | /* Move forward by display lines to find the new window | |
8250 | start. If window width was enlarged, the new start can | |
8251 | be expected to be > the old start. If window width was | |
8252 | decreased, the new window start will be < the old start. | |
8253 | So, we're looking for the display line start with the | |
8254 | minimum distance from the old window start. */ | |
8255 | pos = it.current.pos; | |
8256 | min_distance = INFINITY; | |
8257 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
8258 | distance < min_distance) | |
8259 | { | |
8260 | min_distance = distance; | |
8261 | pos = it.current.pos; | |
8262 | move_it_by_lines (&it, 1, 0); | |
8263 | } | |
8264 | ||
8265 | /* Set the window start there. */ | |
8266 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
8267 | window_start_changed_p = 1; | |
8268 | } | |
1f1ff51d | 8269 | } |
5f5c8ee5 GM |
8270 | |
8271 | return window_start_changed_p; | |
1f1ff51d KH |
8272 | } |
8273 | ||
5f5c8ee5 GM |
8274 | |
8275 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only | |
8276 | selected_window is redisplayed. */ | |
90adcf20 | 8277 | |
a2889657 | 8278 | static void |
5f5c8ee5 | 8279 | redisplay_window (window, just_this_one_p) |
a2889657 | 8280 | Lisp_Object window; |
5f5c8ee5 | 8281 | int just_this_one_p; |
a2889657 | 8282 | { |
5f5c8ee5 GM |
8283 | struct window *w = XWINDOW (window); |
8284 | struct frame *f = XFRAME (w->frame); | |
8285 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 8286 | struct buffer *old = current_buffer; |
5f5c8ee5 | 8287 | struct text_pos lpoint, opoint, startp; |
e481f960 | 8288 | int update_mode_line; |
5f5c8ee5 GM |
8289 | int tem; |
8290 | struct it it; | |
8291 | /* Record it now because it's overwritten. */ | |
8292 | int current_matrix_up_to_date_p = 0; | |
5ba50c51 | 8293 | int really_switched_buffer = 0; |
5f5c8ee5 | 8294 | int temp_scroll_step = 0; |
2e54982e | 8295 | int count = specpdl_ptr - specpdl; |
a2889657 | 8296 | |
5f5c8ee5 GM |
8297 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
8298 | opoint = lpoint; | |
a2889657 | 8299 | |
5f5c8ee5 GM |
8300 | /* W must be a leaf window here. */ |
8301 | xassert (!NILP (w->buffer)); | |
8302 | #if GLYPH_DEBUG | |
8303 | *w->desired_matrix->method = 0; | |
8304 | #endif | |
2e54982e RS |
8305 | |
8306 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
8307 | |
8308 | reconsider_clip_changes (w, buffer); | |
8309 | ||
5f5c8ee5 GM |
8310 | /* Has the mode line to be updated? */ |
8311 | update_mode_line = (!NILP (w->update_mode_line) | |
8312 | || update_mode_lines | |
8313 | || buffer->clip_changed); | |
8de2d90b JB |
8314 | |
8315 | if (MINI_WINDOW_P (w)) | |
8316 | { | |
5f5c8ee5 | 8317 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 8318 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
8319 | { |
8320 | if (update_mode_line) | |
8321 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 8322 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
8323 | goto finish_menu_bars; |
8324 | else | |
8325 | /* We've already displayed the echo area glyphs in this window. */ | |
8326 | goto finish_scroll_bars; | |
8327 | } | |
73af359d | 8328 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 8329 | { |
5f5c8ee5 GM |
8330 | /* W is a mini-buffer window, but it's not the currently |
8331 | active one, so clear it. */ | |
8332 | int yb = window_text_bottom_y (w); | |
8333 | struct glyph_row *row; | |
8334 | int y; | |
8335 | ||
8336 | for (y = 0, row = w->desired_matrix->rows; | |
8337 | y < yb; | |
8338 | y += row->height, ++row) | |
8339 | blank_row (w, row, y); | |
88f22aff | 8340 | goto finish_scroll_bars; |
8de2d90b JB |
8341 | } |
8342 | } | |
a2889657 | 8343 | |
5f5c8ee5 GM |
8344 | /* Otherwise set up data on this window; select its buffer and point |
8345 | value. */ | |
e481f960 | 8346 | if (update_mode_line) |
5ba50c51 | 8347 | { |
5f5c8ee5 GM |
8348 | /* Really select the buffer, for the sake of buffer-local |
8349 | variables. */ | |
5ba50c51 RS |
8350 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
8351 | really_switched_buffer = 1; | |
8352 | } | |
e481f960 RS |
8353 | else |
8354 | set_buffer_temp (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
8355 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
8356 | ||
8357 | current_matrix_up_to_date_p | |
8358 | = (!NILP (w->window_end_valid) | |
8359 | && !current_buffer->clip_changed | |
8360 | && XFASTINT (w->last_modified) >= MODIFF | |
8361 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 8362 | |
5f5c8ee5 GM |
8363 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
8364 | the window end being valid, so set it to nil there. */ | |
8365 | if (windows_or_buffers_changed) | |
8366 | { | |
8367 | /* If window starts on a continuation line, maybe adjust the | |
8368 | window start in case the window's width changed. */ | |
8369 | if (XMARKER (w->start)->buffer == current_buffer) | |
8370 | compute_window_start_on_continuation_line (w); | |
8371 | ||
8372 | w->window_end_valid = Qnil; | |
8373 | } | |
12adba34 | 8374 | |
5f5c8ee5 GM |
8375 | /* Some sanity checks. */ |
8376 | CHECK_WINDOW_END (w); | |
8377 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 8378 | abort (); |
5f5c8ee5 | 8379 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 8380 | abort (); |
a2889657 | 8381 | |
28995e67 RS |
8382 | /* If %c is in mode line, update it if needed. */ |
8383 | if (!NILP (w->column_number_displayed) | |
8384 | /* This alternative quickly identifies a common case | |
8385 | where no change is needed. */ | |
8386 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8387 | && XFASTINT (w->last_modified) >= MODIFF |
8388 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8389 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8390 | update_mode_line = 1; | |
8391 | ||
5f5c8ee5 GM |
8392 | /* Count number of windows showing the selected buffer. An indirect |
8393 | buffer counts as its base buffer. */ | |
8394 | if (!just_this_one_p) | |
42640f83 RS |
8395 | { |
8396 | struct buffer *current_base, *window_base; | |
8397 | current_base = current_buffer; | |
8398 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
8399 | if (current_base->base_buffer) | |
8400 | current_base = current_base->base_buffer; | |
8401 | if (window_base->base_buffer) | |
8402 | window_base = window_base->base_buffer; | |
8403 | if (current_base == window_base) | |
8404 | buffer_shared++; | |
8405 | } | |
a2889657 | 8406 | |
5f5c8ee5 GM |
8407 | /* Point refers normally to the selected window. For any other |
8408 | window, set up appropriate value. */ | |
a2889657 JB |
8409 | if (!EQ (window, selected_window)) |
8410 | { | |
12adba34 RS |
8411 | int new_pt = XMARKER (w->pointm)->charpos; |
8412 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 8413 | if (new_pt < BEGV) |
a2889657 | 8414 | { |
f67a0f51 | 8415 | new_pt = BEGV; |
12adba34 RS |
8416 | new_pt_byte = BEGV_BYTE; |
8417 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 8418 | } |
f67a0f51 | 8419 | else if (new_pt > (ZV - 1)) |
a2889657 | 8420 | { |
f67a0f51 | 8421 | new_pt = ZV; |
12adba34 RS |
8422 | new_pt_byte = ZV_BYTE; |
8423 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 8424 | } |
5f5c8ee5 | 8425 | |
f67a0f51 | 8426 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 8427 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
8428 | } |
8429 | ||
f4faa47c | 8430 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
8431 | have changed, invalidate the width run cache. It's true that |
8432 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
8433 | redisplay goes (non-fatally) haywire when the display table is |
8434 | changed, so why should we worry about doing any better? */ | |
8435 | if (current_buffer->width_run_cache) | |
8436 | { | |
f908610f | 8437 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
8438 | |
8439 | if (! disptab_matches_widthtab (disptab, | |
8440 | XVECTOR (current_buffer->width_table))) | |
8441 | { | |
8442 | invalidate_region_cache (current_buffer, | |
8443 | current_buffer->width_run_cache, | |
8444 | BEG, Z); | |
8445 | recompute_width_table (current_buffer, disptab); | |
8446 | } | |
8447 | } | |
8448 | ||
a2889657 | 8449 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
8450 | if (XMARKER (w->start)->buffer != current_buffer) |
8451 | goto recenter; | |
8452 | ||
5f5c8ee5 | 8453 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 8454 | |
cf0df6ab RS |
8455 | /* If someone specified a new starting point but did not insist, |
8456 | check whether it can be used. */ | |
5f5c8ee5 | 8457 | if (!NILP (w->optional_new_start)) |
cf0df6ab RS |
8458 | { |
8459 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
8460 | /* This takes a mini-buffer prompt into account. */ |
8461 | start_display (&it, w, startp); | |
8462 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8463 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8464 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
8465 | w->force_start = Qt; |
8466 | } | |
8467 | ||
8de2d90b | 8468 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 8469 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
8470 | if (!NILP (w->force_start) |
8471 | || w->frozen_window_start_p) | |
a2889657 | 8472 | { |
e63574d7 | 8473 | w->force_start = Qnil; |
5f5c8ee5 | 8474 | w->vscroll = 0; |
b5174a51 | 8475 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
8476 | |
8477 | /* Forget any recorded base line for line number display. */ | |
8478 | if (!current_matrix_up_to_date_p | |
8479 | || current_buffer->clip_changed) | |
8480 | w->base_line_number = Qnil; | |
8481 | ||
75c43375 RS |
8482 | /* Redisplay the mode line. Select the buffer properly for that. |
8483 | Also, run the hook window-scroll-functions | |
8484 | because we have scrolled. */ | |
e63574d7 RS |
8485 | /* Note, we do this after clearing force_start because |
8486 | if there's an error, it is better to forget about force_start | |
8487 | than to get into an infinite loop calling the hook functions | |
8488 | and having them get more errors. */ | |
75c43375 RS |
8489 | if (!update_mode_line |
8490 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 8491 | { |
5ba50c51 RS |
8492 | if (!really_switched_buffer) |
8493 | { | |
8494 | set_buffer_temp (old); | |
8495 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8496 | really_switched_buffer = 1; |
5ba50c51 | 8497 | } |
5f5c8ee5 | 8498 | |
e481f960 RS |
8499 | update_mode_line = 1; |
8500 | w->update_mode_line = Qt; | |
5f5c8ee5 | 8501 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 8502 | } |
5f5c8ee5 | 8503 | |
c2213350 | 8504 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8505 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
8506 | if (CHARPOS (startp) < BEGV) |
8507 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
8508 | else if (CHARPOS (startp) > ZV) | |
8509 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
8510 | ||
8511 | /* Redisplay, then check if cursor has been set during the | |
8512 | redisplay. Give up if new fonts were loaded. */ | |
8513 | if (!try_window (window, startp)) | |
8514 | { | |
8515 | w->force_start = Qt; | |
8516 | clear_glyph_matrix (w->desired_matrix); | |
8517 | goto restore_buffers; | |
8518 | } | |
8519 | ||
9472f927 | 8520 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 GM |
8521 | { |
8522 | /* If point does not appear, or on a line that is not fully | |
8523 | visible, move point so it does appear. The desired | |
8524 | matrix has been built above, so we can use it. */ | |
8525 | int height = window_box_height (w) / 2; | |
8526 | struct glyph_row *row = MATRIX_ROW (w->desired_matrix, 0); | |
8527 | ||
8528 | while (row->y < height) | |
8529 | ++row; | |
8530 | ||
8531 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
8532 | MATRIX_ROW_START_BYTEPOS (row)); | |
8533 | ||
90adcf20 | 8534 | if (w != XWINDOW (selected_window)) |
12adba34 | 8535 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
8536 | else if (current_buffer == old) |
8537 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
8538 | ||
8539 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
8540 | ||
8541 | /* If we are highlighting the region, then we just changed | |
8542 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
8543 | if (!NILP (Vtransient_mark_mode) |
8544 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 8545 | { |
5f5c8ee5 GM |
8546 | clear_glyph_matrix (w->desired_matrix); |
8547 | if (!try_window (window, startp)) | |
8548 | goto restore_buffers; | |
6f27fa9b | 8549 | } |
a2889657 | 8550 | } |
5f5c8ee5 GM |
8551 | |
8552 | make_cursor_line_fully_visible (w); | |
8553 | #if GLYPH_DEBUG | |
8554 | debug_method_add (w, "forced window start"); | |
8555 | #endif | |
a2889657 JB |
8556 | goto done; |
8557 | } | |
8558 | ||
5f5c8ee5 GM |
8559 | /* Handle case where text has not changed, only point, and it has |
8560 | not moved off the frame. */ | |
8561 | if (current_matrix_up_to_date_p | |
8562 | /* Point may be in this window. */ | |
8563 | && PT >= CHARPOS (startp) | |
8564 | /* If we don't check this, we are called to move the cursor in a | |
8565 | horizontally split window with a current matrix that doesn't | |
8566 | fit the display. */ | |
8567 | && !windows_or_buffers_changed | |
8568 | /* Selective display hasn't changed. */ | |
8569 | && !current_buffer->clip_changed | |
b1aa6cb3 RS |
8570 | /* If force-mode-line-update was called, really redisplay; |
8571 | that's how redisplay is forced after e.g. changing | |
8572 | buffer-invisibility-spec. */ | |
632ab665 | 8573 | && NILP (w->update_mode_line) |
5f5c8ee5 GM |
8574 | /* Can't use this case if highlighting a region. When a |
8575 | region exists, cursor movement has to do more than just | |
8576 | set the cursor. */ | |
8577 | && !(!NILP (Vtransient_mark_mode) | |
8578 | && !NILP (current_buffer->mark_active)) | |
bd66d1ba | 8579 | && NILP (w->region_showing) |
8f897821 | 8580 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
8581 | /* Right after splitting windows, last_point may be nil. */ |
8582 | && INTEGERP (w->last_point) | |
8583 | /* This code is not used for mini-buffer for the sake of the case | |
8584 | of redisplaying to replace an echo area message; since in | |
8585 | that case the mini-buffer contents per se are usually | |
8586 | unchanged. This code is of no real use in the mini-buffer | |
8587 | since the handling of this_line_start_pos, etc., in redisplay | |
8588 | handles the same cases. */ | |
d45de95b | 8589 | && !EQ (window, minibuf_window) |
5f5c8ee5 GM |
8590 | /* When splitting windows or for new windows, it happens that |
8591 | redisplay is called with a nil window_end_vpos or one being | |
8592 | larger than the window. This should really be fixed in | |
8593 | window.c. I don't have this on my list, now, so we do | |
8594 | approximately the same as the old redisplay code. --gerd. */ | |
8595 | && INTEGERP (w->window_end_vpos) | |
8596 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
8597 | && (FRAME_WINDOW_P (f) | |
8598 | || !MARKERP (Voverlay_arrow_position) | |
377dbd97 | 8599 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) |
a2889657 | 8600 | { |
5f5c8ee5 GM |
8601 | int this_scroll_margin; |
8602 | struct glyph_row *row; | |
8603 | int scroll_p; | |
a2889657 | 8604 | |
5f5c8ee5 GM |
8605 | #if GLYPH_DEBUG |
8606 | debug_method_add (w, "cursor movement"); | |
8607 | #endif | |
9afd2168 | 8608 | |
5f5c8ee5 GM |
8609 | /* Scroll if point within this distance from the top or bottom |
8610 | of the window. This is a pixel value. */ | |
8611 | this_scroll_margin = max (0, scroll_margin); | |
8612 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
8613 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8614 | ||
8615 | /* Start with the row the cursor was displayed during the last | |
8616 | not paused redisplay. Give up if that row is not valid. */ | |
8617 | if (w->last_cursor.vpos >= w->current_matrix->nrows) | |
8618 | goto try_to_scroll; | |
8619 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
8620 | if (row->mode_line_p) | |
8621 | ++row; | |
8622 | if (!row->enabled_p) | |
8623 | goto try_to_scroll; | |
8624 | ||
8625 | scroll_p = 0; | |
8626 | if (PT > XFASTINT (w->last_point)) | |
8627 | { | |
8628 | /* Point has moved forward. */ | |
8629 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
8630 | ||
8631 | while ((MATRIX_ROW_END_CHARPOS (row) < PT | |
8632 | /* The end position of a row equals the start | |
8633 | position of the next row. If PT is there, we | |
8634 | would rather display it in the next line, except | |
8635 | when this line ends in ZV. */ | |
8636 | || (MATRIX_ROW_END_CHARPOS (row) == PT | |
8637 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
8638 | || !row->ends_at_zv_p))) | |
8639 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
8640 | { | |
8641 | xassert (row->enabled_p); | |
8642 | ++row; | |
8643 | } | |
9afd2168 | 8644 | |
5f5c8ee5 GM |
8645 | /* If within the scroll margin, scroll. Note that |
8646 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which the | |
8647 | next line would be drawn, and that this_scroll_margin can | |
8648 | be zero. */ | |
8649 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
8650 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
8651 | /* Line is completely visible last line in window and PT | |
8652 | is to be set in the next line. */ | |
8653 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
8654 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
8655 | && !row->ends_at_zv_p | |
8656 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
8657 | scroll_p = 1; | |
8658 | } | |
8659 | else if (PT < XFASTINT (w->last_point)) | |
a2889657 | 8660 | { |
5f5c8ee5 GM |
8661 | /* Cursor has to be moved backward. Note that PT >= |
8662 | CHARPOS (startp) because of the outer if-statement. */ | |
8663 | while (!row->mode_line_p | |
8664 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
8665 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
8666 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
8667 | && (row->y > this_scroll_margin | |
8668 | || CHARPOS (startp) == BEGV)) | |
a2889657 | 8669 | { |
5f5c8ee5 GM |
8670 | xassert (row->enabled_p); |
8671 | --row; | |
a2889657 | 8672 | } |
abb4c08f | 8673 | |
5f5c8ee5 GM |
8674 | /* Consider the following case: Window starts at BEGV, there |
8675 | is invisible, intangible text at BEGV, so that display | |
8676 | starts at some point START > BEGV. It can happen that | |
8677 | we are called with PT somewhere between BEGV and START. | |
8678 | Try to handle that case. */ | |
8679 | if (row < w->current_matrix->rows | |
8680 | || row->mode_line_p) | |
8681 | { | |
8682 | row = w->current_matrix->rows; | |
8683 | if (row->mode_line_p) | |
8684 | ++row; | |
8685 | } | |
8686 | ||
8687 | /* Due to newlines in overlay strings, we may have to skip | |
8688 | forward over overlay strings. */ | |
8689 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
8690 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
8691 | && !row->ends_at_zv_p) | |
8692 | ++row; | |
8693 | ||
8694 | /* If within the scroll margin, scroll. */ | |
8695 | if (row->y < this_scroll_margin | |
8696 | && CHARPOS (startp) != BEGV) | |
8697 | scroll_p = 1; | |
8698 | } | |
8699 | ||
8700 | /* if PT is not in the glyph row, give up. */ | |
8701 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8702 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8703 | goto try_to_scroll; | |
8704 | ||
8705 | /* If we end up in a partially visible line, let's make it fully | |
8706 | visible. This can be done most easily by using the existing | |
8707 | scrolling code. */ | |
8708 | if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8709 | { | |
8710 | temp_scroll_step = 1; | |
8711 | goto try_to_scroll; | |
a2889657 | 8712 | } |
5f5c8ee5 GM |
8713 | else if (scroll_p) |
8714 | goto try_to_scroll; | |
8715 | ||
8716 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8717 | goto done; | |
a2889657 | 8718 | } |
5f5c8ee5 | 8719 | |
a2889657 JB |
8720 | /* If current starting point was originally the beginning of a line |
8721 | but no longer is, find a new starting point. */ | |
265a9e55 | 8722 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
8723 | && !(CHARPOS (startp) <= BEGV |
8724 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 8725 | { |
5f5c8ee5 GM |
8726 | #if GLYPH_DEBUG |
8727 | debug_method_add (w, "recenter 1"); | |
8728 | #endif | |
a2889657 JB |
8729 | goto recenter; |
8730 | } | |
5f5c8ee5 GM |
8731 | |
8732 | /* Try scrolling with try_window_id. */ | |
9142dd5b GM |
8733 | else if (/* Windows and buffers haven't changed. */ |
8734 | !windows_or_buffers_changed | |
5f5c8ee5 GM |
8735 | /* Window must be either use window-based redisplay or |
8736 | be full width. */ | |
8737 | && (FRAME_WINDOW_P (f) | |
c59c668a | 8738 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))) |
5f5c8ee5 GM |
8739 | && !MINI_WINDOW_P (w) |
8740 | /* Point is not known NOT to appear in window. */ | |
8741 | && PT >= CHARPOS (startp) | |
a2889657 | 8742 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
8743 | /* Window is not hscrolled. */ |
8744 | && XFASTINT (w->hscroll) == 0 | |
8745 | /* Selective display has not changed. */ | |
8746 | && !current_buffer->clip_changed | |
8747 | /* Current matrix is up to date. */ | |
8748 | && !NILP (w->window_end_valid) | |
8749 | /* Can't use this case if highlighting a region because | |
8750 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
8751 | && !(!NILP (Vtransient_mark_mode) |
8752 | && !NILP (current_buffer->mark_active)) | |
8753 | && NILP (w->region_showing) | |
8f897821 | 8754 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 | 8755 | /* Overlay arrow position and string not changed. */ |
d45de95b | 8756 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 8757 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
8758 | /* Value is > 0 if update has been done, it is -1 if we |
8759 | know that the same window start will not work. It is 0 | |
8760 | if unsuccessful for some other reason. */ | |
8761 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 8762 | { |
5f5c8ee5 GM |
8763 | #if GLYPH_DEBUG |
8764 | debug_method_add (w, "try_window_id"); | |
8765 | #endif | |
8766 | ||
8767 | if (fonts_changed_p) | |
8768 | goto restore_buffers; | |
a2889657 JB |
8769 | if (tem > 0) |
8770 | goto done; | |
5f5c8ee5 GM |
8771 | /* Otherwise try_window_id has returned -1 which means that we |
8772 | don't want the alternative below this comment to execute. */ | |
a2889657 | 8773 | } |
5f5c8ee5 GM |
8774 | else if (CHARPOS (startp) >= BEGV |
8775 | && CHARPOS (startp) <= ZV | |
8776 | && PT >= CHARPOS (startp) | |
8777 | && (CHARPOS (startp) < ZV | |
e9874cee | 8778 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 8779 | || CHARPOS (startp) == BEGV |
8850a573 RS |
8780 | || (XFASTINT (w->last_modified) >= MODIFF |
8781 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 8782 | { |
5f5c8ee5 GM |
8783 | #if GLYPH_DEBUG |
8784 | debug_method_add (w, "same window start"); | |
8785 | #endif | |
8786 | ||
8787 | /* Try to redisplay starting at same place as before. | |
8788 | If point has not moved off frame, accept the results. */ | |
8789 | if (!current_matrix_up_to_date_p | |
8790 | /* Don't use try_window_reusing_current_matrix in this case | |
8791 | because it can have changed the buffer. */ | |
8792 | || !NILP (Vwindow_scroll_functions) | |
8793 | || MINI_WINDOW_P (w) | |
8794 | || !try_window_reusing_current_matrix (w)) | |
8795 | { | |
8796 | IF_DEBUG (debug_method_add (w, "1")); | |
8797 | try_window (window, startp); | |
8798 | } | |
8799 | ||
8800 | if (fonts_changed_p) | |
8801 | goto restore_buffers; | |
8802 | ||
8803 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 8804 | { |
5f5c8ee5 GM |
8805 | if (!just_this_one_p |
8806 | || current_buffer->clip_changed | |
9142dd5b | 8807 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
8808 | /* Forget any recorded base line for line number display. */ |
8809 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
8810 | |
8811 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
8812 | goto done; |
8813 | } | |
a2889657 | 8814 | else |
5f5c8ee5 | 8815 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
8816 | } |
8817 | ||
5f5c8ee5 GM |
8818 | try_to_scroll: |
8819 | ||
c2213350 | 8820 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8821 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 8822 | |
e481f960 RS |
8823 | /* Redisplay the mode line. Select the buffer properly for that. */ |
8824 | if (!update_mode_line) | |
8825 | { | |
5ba50c51 RS |
8826 | if (!really_switched_buffer) |
8827 | { | |
8828 | set_buffer_temp (old); | |
8829 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8830 | really_switched_buffer = 1; |
5ba50c51 | 8831 | } |
e481f960 RS |
8832 | update_mode_line = 1; |
8833 | w->update_mode_line = Qt; | |
8834 | } | |
a2889657 | 8835 | |
5f5c8ee5 GM |
8836 | /* Try to scroll by specified few lines. */ |
8837 | if ((scroll_conservatively | |
8838 | || scroll_step | |
8839 | || temp_scroll_step | |
8840 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
8841 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 8842 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
8843 | && CHARPOS (startp) >= BEGV |
8844 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 8845 | { |
5f5c8ee5 GM |
8846 | /* The function returns -1 if new fonts were loaded, 1 if |
8847 | successful, 0 if not successful. */ | |
8848 | int rc = try_scrolling (window, just_this_one_p, | |
8849 | scroll_conservatively, | |
8850 | scroll_step, | |
8851 | temp_scroll_step); | |
8852 | if (rc > 0) | |
8853 | goto done; | |
8854 | else if (rc < 0) | |
8855 | goto restore_buffers; | |
8856 | } | |
f9c8af06 | 8857 | |
5f5c8ee5 | 8858 | /* Finally, just choose place to start which centers point */ |
5936754e | 8859 | |
5f5c8ee5 | 8860 | recenter: |
44173109 | 8861 | |
5f5c8ee5 GM |
8862 | #if GLYPH_DEBUG |
8863 | debug_method_add (w, "recenter"); | |
8864 | #endif | |
0789adb2 | 8865 | |
5f5c8ee5 | 8866 | /* w->vscroll = 0; */ |
0789adb2 | 8867 | |
5f5c8ee5 GM |
8868 | /* Forget any previously recorded base line for line number display. */ |
8869 | if (!current_matrix_up_to_date_p | |
8870 | || current_buffer->clip_changed) | |
8871 | w->base_line_number = Qnil; | |
8872 | ||
8873 | /* Move backward half the height of the window. */ | |
8874 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8875 | it.current_y = it.last_visible_y; | |
8876 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
8877 | xassert (IT_CHARPOS (it) >= BEGV); | |
8878 | ||
8879 | /* The function move_it_vertically_backward may move over more | |
8880 | than the specified y-distance. If it->w is small, e.g. a | |
8881 | mini-buffer window, we may end up in front of the window's | |
8882 | display area. Start displaying at the start of the line | |
8883 | containing PT in this case. */ | |
8884 | if (it.current_y <= 0) | |
8885 | { | |
8886 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
8887 | move_it_vertically (&it, 0); | |
8888 | xassert (IT_CHARPOS (it) <= PT); | |
8889 | it.current_y = 0; | |
0789adb2 RS |
8890 | } |
8891 | ||
5f5c8ee5 GM |
8892 | it.current_x = it.hpos = 0; |
8893 | ||
8894 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
8895 | in case the window-scroll-functions functions get errors. */ | |
8896 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
8897 | ||
8898 | /* Run scroll hooks. */ | |
8899 | startp = run_window_scroll_functions (window, it.current.pos); | |
8900 | ||
8901 | /* Redisplay the window. */ | |
8902 | if (!current_matrix_up_to_date_p | |
8903 | || windows_or_buffers_changed | |
8904 | /* Don't use try_window_reusing_current_matrix in this case | |
8905 | because it can have changed the buffer. */ | |
8906 | || !NILP (Vwindow_scroll_functions) | |
8907 | || !just_this_one_p | |
8908 | || MINI_WINDOW_P (w) | |
8909 | || !try_window_reusing_current_matrix (w)) | |
8910 | try_window (window, startp); | |
8911 | ||
8912 | /* If new fonts have been loaded (due to fontsets), give up. We | |
8913 | have to start a new redisplay since we need to re-adjust glyph | |
8914 | matrices. */ | |
8915 | if (fonts_changed_p) | |
8916 | goto restore_buffers; | |
8917 | ||
8918 | /* If cursor did not appear assume that the middle of the window is | |
8919 | in the first line of the window. Do it again with the next line. | |
8920 | (Imagine a window of height 100, displaying two lines of height | |
8921 | 60. Moving back 50 from it->last_visible_y will end in the first | |
8922 | line.) */ | |
8923 | if (w->cursor.vpos < 0) | |
a2889657 | 8924 | { |
5f5c8ee5 GM |
8925 | if (!NILP (w->window_end_valid) |
8926 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 8927 | { |
5f5c8ee5 GM |
8928 | clear_glyph_matrix (w->desired_matrix); |
8929 | move_it_by_lines (&it, 1, 0); | |
8930 | try_window (window, it.current.pos); | |
a2889657 | 8931 | } |
5f5c8ee5 | 8932 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 8933 | { |
5f5c8ee5 GM |
8934 | clear_glyph_matrix (w->desired_matrix); |
8935 | move_it_by_lines (&it, -1, 0); | |
8936 | try_window (window, it.current.pos); | |
8937 | } | |
8938 | else | |
8939 | { | |
8940 | /* Not much we can do about it. */ | |
a2889657 | 8941 | } |
a2889657 | 8942 | } |
010494d0 | 8943 | |
5f5c8ee5 GM |
8944 | /* Consider the following case: Window starts at BEGV, there is |
8945 | invisible, intangible text at BEGV, so that display starts at | |
8946 | some point START > BEGV. It can happen that we are called with | |
8947 | PT somewhere between BEGV and START. Try to handle that case. */ | |
8948 | if (w->cursor.vpos < 0) | |
835766b6 | 8949 | { |
5f5c8ee5 GM |
8950 | struct glyph_row *row = w->current_matrix->rows; |
8951 | if (row->mode_line_p) | |
8952 | ++row; | |
8953 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 8954 | } |
5f5c8ee5 GM |
8955 | |
8956 | make_cursor_line_fully_visible (w); | |
b5174a51 | 8957 | |
74d481ac GM |
8958 | done: |
8959 | ||
5f5c8ee5 GM |
8960 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
8961 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
8962 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
8963 | ? Qt : Qnil); | |
a2889657 | 8964 | |
5f5c8ee5 | 8965 | /* Display the mode line, if we must. */ |
e481f960 | 8966 | if ((update_mode_line |
aa6d10fa | 8967 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
8968 | if (a) the window to its side is being redone and |
8969 | (b) we do a frame-based redisplay. This is a consequence | |
8970 | of how inverted lines are drawn in frame-based redisplay. */ | |
8971 | || (!just_this_one_p | |
8972 | && !FRAME_WINDOW_P (f) | |
8973 | && !WINDOW_FULL_WIDTH_P (w)) | |
8974 | /* Line number to display. */ | |
155ef550 | 8975 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 8976 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
8977 | || (!NILP (w->column_number_displayed) |
8978 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
8979 | /* This means that the window has a mode line. */ |
8980 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 8981 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 8982 | { |
5f5c8ee5 GM |
8983 | display_mode_lines (w); |
8984 | ||
8985 | /* If mode line height has changed, arrange for a thorough | |
8986 | immediate redisplay using the correct mode line height. */ | |
8987 | if (WINDOW_WANTS_MODELINE_P (w) | |
8988 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 8989 | { |
5f5c8ee5 GM |
8990 | fonts_changed_p = 1; |
8991 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
8992 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 8993 | } |
5f5c8ee5 GM |
8994 | |
8995 | /* If top line height has changed, arrange for a thorough | |
8996 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
8997 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
8998 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
8999 | { |
9000 | fonts_changed_p = 1; | |
045dee35 GM |
9001 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
9002 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
9003 | } |
9004 | ||
9005 | if (fonts_changed_p) | |
9006 | goto restore_buffers; | |
5ba50c51 | 9007 | } |
5f5c8ee5 GM |
9008 | |
9009 | if (!line_number_displayed | |
9010 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
9011 | { |
9012 | w->base_line_pos = Qnil; | |
9013 | w->base_line_number = Qnil; | |
9014 | } | |
a2889657 | 9015 | |
5f5c8ee5 GM |
9016 | finish_menu_bars: |
9017 | ||
7ce2c095 | 9018 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 9019 | if (update_mode_line |
5f5c8ee5 GM |
9020 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
9021 | { | |
9022 | int redisplay_menu_p = 0; | |
9023 | ||
9024 | if (FRAME_WINDOW_P (f)) | |
9025 | { | |
dc937613 | 9026 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 9027 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 9028 | #else |
5f5c8ee5 | 9029 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 9030 | #endif |
5f5c8ee5 GM |
9031 | } |
9032 | else | |
9033 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
9034 | ||
9035 | if (redisplay_menu_p) | |
9036 | display_menu_bar (w); | |
9037 | ||
9038 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
9039 | if (WINDOWP (f->tool_bar_window) |
9040 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
9041 | || auto_resize_tool_bars_p)) | |
9042 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
9043 | #endif |
9044 | } | |
7ce2c095 | 9045 | |
88f22aff | 9046 | finish_scroll_bars: |
5f5c8ee5 | 9047 | |
88f22aff | 9048 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 9049 | { |
b1d1124b | 9050 | int start, end, whole; |
30c566e4 | 9051 | |
b1d1124b | 9052 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
9053 | At some point, it would be nice to choose between scrollbars |
9054 | which reflect the whole buffer size, with special markers | |
9055 | indicating narrowing, and scrollbars which reflect only the | |
9056 | visible region. | |
9057 | ||
5f5c8ee5 | 9058 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 9059 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 9060 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 9061 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 9062 | { |
8a9311d7 | 9063 | whole = ZV - BEGV; |
4d641a15 | 9064 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
9065 | /* I don't think this is guaranteed to be right. For the |
9066 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 9067 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 9068 | |
5f5c8ee5 GM |
9069 | if (end < start) |
9070 | end = start; | |
9071 | if (whole < (end - start)) | |
9072 | whole = end - start; | |
b1d1124b JB |
9073 | } |
9074 | else | |
9075 | start = end = whole = 0; | |
30c566e4 | 9076 | |
88f22aff | 9077 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 9078 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 9079 | |
5f5c8ee5 GM |
9080 | /* Note that we actually used the scroll bar attached to this |
9081 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 9082 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 9083 | } |
b1d1124b | 9084 | |
5f5c8ee5 GM |
9085 | restore_buffers: |
9086 | ||
9087 | /* Restore current_buffer and value of point in it. */ | |
9088 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
5ba50c51 | 9089 | if (really_switched_buffer) |
f72df6ac | 9090 | set_buffer_internal_1 (old); |
e481f960 RS |
9091 | else |
9092 | set_buffer_temp (old); | |
5f5c8ee5 | 9093 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
9094 | |
9095 | unbind_to (count, Qnil); | |
a2889657 | 9096 | } |
a2889657 | 9097 | |
5f5c8ee5 GM |
9098 | |
9099 | /* Build the complete desired matrix of WINDOW with a window start | |
9100 | buffer position POS. Value is non-zero if successful. It is zero | |
9101 | if fonts were loaded during redisplay which makes re-adjusting | |
9102 | glyph matrices necessary. */ | |
9103 | ||
9104 | int | |
a2889657 JB |
9105 | try_window (window, pos) |
9106 | Lisp_Object window; | |
5f5c8ee5 GM |
9107 | struct text_pos pos; |
9108 | { | |
9109 | struct window *w = XWINDOW (window); | |
9110 | struct it it; | |
9111 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 9112 | |
5f5c8ee5 GM |
9113 | /* Make POS the new window start. */ |
9114 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 9115 | |
5f5c8ee5 GM |
9116 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
9117 | w->cursor.vpos = -1; | |
a2889657 | 9118 | overlay_arrow_seen = 0; |
642eefc6 | 9119 | |
5f5c8ee5 GM |
9120 | /* Initialize iterator and info to start at POS. */ |
9121 | start_display (&it, w, pos); | |
a2889657 | 9122 | |
5f5c8ee5 GM |
9123 | /* Display all lines of W. */ |
9124 | while (it.current_y < it.last_visible_y) | |
9125 | { | |
9126 | if (display_line (&it)) | |
9127 | last_text_row = it.glyph_row - 1; | |
9128 | if (fonts_changed_p) | |
9129 | return 0; | |
9130 | } | |
a2889657 | 9131 | |
5f5c8ee5 GM |
9132 | /* If bottom moved off end of frame, change mode line percentage. */ |
9133 | if (XFASTINT (w->window_end_pos) <= 0 | |
9134 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
9135 | w->update_mode_line = Qt; |
9136 | ||
5f5c8ee5 GM |
9137 | /* Set window_end_pos to the offset of the last character displayed |
9138 | on the window from the end of current_buffer. Set | |
9139 | window_end_vpos to its row number. */ | |
9140 | if (last_text_row) | |
9141 | { | |
9142 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
9143 | w->window_end_bytepos | |
9144 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9145 | XSETFASTINT (w->window_end_pos, | |
9146 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9147 | XSETFASTINT (w->window_end_vpos, | |
9148 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9149 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
9150 | ->displays_text_p); | |
9151 | } | |
9152 | else | |
9153 | { | |
9154 | w->window_end_bytepos = 0; | |
9155 | XSETFASTINT (w->window_end_pos, 0); | |
9156 | XSETFASTINT (w->window_end_vpos, 0); | |
9157 | } | |
9158 | ||
a2889657 JB |
9159 | /* But that is not valid info until redisplay finishes. */ |
9160 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 9161 | return 1; |
a2889657 | 9162 | } |
5f5c8ee5 GM |
9163 | |
9164 | ||
a2889657 | 9165 | \f |
5f5c8ee5 GM |
9166 | /************************************************************************ |
9167 | Window redisplay reusing current matrix when buffer has not changed | |
9168 | ************************************************************************/ | |
9169 | ||
9170 | /* Try redisplay of window W showing an unchanged buffer with a | |
9171 | different window start than the last time it was displayed by | |
9172 | reusing its current matrix. Value is non-zero if successful. | |
9173 | W->start is the new window start. */ | |
a2889657 JB |
9174 | |
9175 | static int | |
5f5c8ee5 GM |
9176 | try_window_reusing_current_matrix (w) |
9177 | struct window *w; | |
a2889657 | 9178 | { |
5f5c8ee5 GM |
9179 | struct frame *f = XFRAME (w->frame); |
9180 | struct glyph_row *row, *bottom_row; | |
9181 | struct it it; | |
9182 | struct run run; | |
9183 | struct text_pos start, new_start; | |
9184 | int nrows_scrolled, i; | |
9185 | struct glyph_row *last_text_row; | |
9186 | struct glyph_row *last_reused_text_row; | |
9187 | struct glyph_row *start_row; | |
9188 | int start_vpos, min_y, max_y; | |
9189 | ||
9190 | /* Right now this function doesn't handle terminal frames. */ | |
9191 | if (!FRAME_WINDOW_P (f)) | |
9192 | return 0; | |
a2889657 | 9193 | |
5f5c8ee5 GM |
9194 | /* Can't do this if region may have changed. */ |
9195 | if ((!NILP (Vtransient_mark_mode) | |
9196 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
9197 | || !NILP (w->region_showing) |
9198 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 9199 | return 0; |
a2889657 | 9200 | |
5f5c8ee5 | 9201 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
9202 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9203 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
9204 | return 0; |
9205 | ||
9206 | /* Give up if old or new display is scrolled vertically. We could | |
9207 | make this function handle this, but right now it doesn't. */ | |
9208 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9209 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
9210 | return 0; | |
9211 | ||
9212 | /* The variable new_start now holds the new window start. The old | |
9213 | start `start' can be determined from the current matrix. */ | |
9214 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
9215 | start = start_row->start.pos; | |
9216 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 9217 | |
5f5c8ee5 GM |
9218 | /* Clear the desired matrix for the display below. */ |
9219 | clear_glyph_matrix (w->desired_matrix); | |
9220 | ||
9221 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
9222 | { | |
9223 | int first_row_y; | |
9224 | ||
9225 | IF_DEBUG (debug_method_add (w, "twu1")); | |
9226 | ||
9227 | /* Display up to a row that can be reused. The variable | |
9228 | last_text_row is set to the last row displayed that displays | |
9229 | text. */ | |
9230 | start_display (&it, w, new_start); | |
9231 | first_row_y = it.current_y; | |
9232 | w->cursor.vpos = -1; | |
9233 | last_text_row = last_reused_text_row = NULL; | |
9234 | while (it.current_y < it.last_visible_y | |
9235 | && IT_CHARPOS (it) < CHARPOS (start) | |
9236 | && !fonts_changed_p) | |
9237 | if (display_line (&it)) | |
9238 | last_text_row = it.glyph_row - 1; | |
9239 | ||
9240 | /* A value of current_y < last_visible_y means that we stopped | |
9241 | at the previous window start, which in turn means that we | |
9242 | have at least one reusable row. */ | |
9243 | if (it.current_y < it.last_visible_y) | |
a2889657 | 9244 | { |
5f5c8ee5 GM |
9245 | nrows_scrolled = it.vpos; |
9246 | ||
9247 | /* Find PT if not already found in the lines displayed. */ | |
9248 | if (w->cursor.vpos < 0) | |
a2889657 | 9249 | { |
5f5c8ee5 GM |
9250 | int dy = it.current_y - first_row_y; |
9251 | ||
9252 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9253 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9254 | { | |
9255 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
9256 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9257 | { | |
9258 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
9259 | dy, nrows_scrolled); | |
9260 | break; | |
9261 | } | |
9262 | ||
9263 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
9264 | break; | |
9265 | ||
9266 | ++row; | |
9267 | } | |
9268 | ||
9269 | /* Give up if point was not found. This shouldn't | |
9270 | happen often; not more often than with try_window | |
9271 | itself. */ | |
9272 | if (w->cursor.vpos < 0) | |
9273 | { | |
9274 | clear_glyph_matrix (w->desired_matrix); | |
9275 | return 0; | |
9276 | } | |
a2889657 | 9277 | } |
5f5c8ee5 GM |
9278 | |
9279 | /* Scroll the display. Do it before the current matrix is | |
9280 | changed. The problem here is that update has not yet | |
9281 | run, i.e. part of the current matrix is not up to date. | |
9282 | scroll_run_hook will clear the cursor, and use the | |
9283 | current matrix to get the height of the row the cursor is | |
9284 | in. */ | |
9285 | run.current_y = first_row_y; | |
9286 | run.desired_y = it.current_y; | |
9287 | run.height = it.last_visible_y - it.current_y; | |
9288 | if (run.height > 0) | |
a2889657 | 9289 | { |
5f5c8ee5 GM |
9290 | update_begin (f); |
9291 | rif->update_window_begin_hook (w); | |
9292 | rif->scroll_run_hook (w, &run); | |
9293 | rif->update_window_end_hook (w, 0); | |
9294 | update_end (f); | |
a2889657 | 9295 | } |
5f5c8ee5 GM |
9296 | |
9297 | /* Shift current matrix down by nrows_scrolled lines. */ | |
9298 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9299 | rotate_matrix (w->current_matrix, | |
9300 | start_vpos, | |
9301 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9302 | nrows_scrolled); | |
9303 | ||
9304 | /* Disable lines not reused. */ | |
9305 | for (i = 0; i < it.vpos; ++i) | |
9306 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
9307 | ||
9308 | /* Re-compute Y positions. */ | |
9309 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
045dee35 | 9310 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9311 | max_y = it.last_visible_y; |
9312 | while (row < bottom_row) | |
d2f84654 | 9313 | { |
5f5c8ee5 GM |
9314 | row->y = it.current_y; |
9315 | ||
9316 | if (row->y < min_y) | |
9317 | row->visible_height = row->height - (min_y - row->y); | |
9318 | else if (row->y + row->height > max_y) | |
9319 | row->visible_height | |
9320 | = row->height - (row->y + row->height - max_y); | |
9321 | else | |
9322 | row->visible_height = row->height; | |
9323 | ||
9324 | it.current_y += row->height; | |
9325 | ++it.vpos; | |
9326 | ||
9327 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9328 | last_reused_text_row = row; | |
9329 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
9330 | break; | |
9331 | ++row; | |
d2f84654 | 9332 | } |
a2889657 | 9333 | } |
5f5c8ee5 GM |
9334 | |
9335 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
9336 | reused row from the current matrix containing text, if any. | |
9337 | The value of last_text_row is the last displayed line | |
9338 | containing text. */ | |
9339 | if (last_reused_text_row) | |
a2889657 | 9340 | { |
5f5c8ee5 GM |
9341 | w->window_end_bytepos |
9342 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
9343 | XSETFASTINT (w->window_end_pos, | |
9344 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
9345 | XSETFASTINT (w->window_end_vpos, | |
9346 | MATRIX_ROW_VPOS (last_reused_text_row, | |
9347 | w->current_matrix)); | |
a2889657 | 9348 | } |
5f5c8ee5 GM |
9349 | else if (last_text_row) |
9350 | { | |
9351 | w->window_end_bytepos | |
9352 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9353 | XSETFASTINT (w->window_end_pos, | |
9354 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9355 | XSETFASTINT (w->window_end_vpos, | |
9356 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9357 | } | |
9358 | else | |
9359 | { | |
9360 | /* This window must be completely empty. */ | |
9361 | w->window_end_bytepos = 0; | |
9362 | XSETFASTINT (w->window_end_pos, 0); | |
9363 | XSETFASTINT (w->window_end_vpos, 0); | |
9364 | } | |
9365 | w->window_end_valid = Qnil; | |
a2889657 | 9366 | |
5f5c8ee5 GM |
9367 | /* Update hint: don't try scrolling again in update_window. */ |
9368 | w->desired_matrix->no_scrolling_p = 1; | |
9369 | ||
9370 | #if GLYPH_DEBUG | |
9371 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
9372 | #endif | |
9373 | return 1; | |
a2889657 | 9374 | } |
5f5c8ee5 GM |
9375 | else if (CHARPOS (new_start) > CHARPOS (start)) |
9376 | { | |
9377 | struct glyph_row *pt_row, *row; | |
9378 | struct glyph_row *first_reusable_row; | |
9379 | struct glyph_row *first_row_to_display; | |
9380 | int dy; | |
9381 | int yb = window_text_bottom_y (w); | |
9382 | ||
9383 | IF_DEBUG (debug_method_add (w, "twu2")); | |
9384 | ||
9385 | /* Find the row starting at new_start, if there is one. Don't | |
9386 | reuse a partially visible line at the end. */ | |
9387 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9388 | while (first_reusable_row->enabled_p | |
9389 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
9390 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9391 | < CHARPOS (new_start))) | |
9392 | ++first_reusable_row; | |
9393 | ||
9394 | /* Give up if there is no row to reuse. */ | |
9395 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
9396 | || !first_reusable_row->enabled_p |
9397 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9398 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
9399 | return 0; |
9400 | ||
5f5c8ee5 GM |
9401 | /* We can reuse fully visible rows beginning with |
9402 | first_reusable_row to the end of the window. Set | |
9403 | first_row_to_display to the first row that cannot be reused. | |
9404 | Set pt_row to the row containing point, if there is any. */ | |
9405 | first_row_to_display = first_reusable_row; | |
9406 | pt_row = NULL; | |
9407 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
9408 | { | |
9409 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
9410 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
9411 | pt_row = first_row_to_display; | |
a2889657 | 9412 | |
5f5c8ee5 GM |
9413 | ++first_row_to_display; |
9414 | } | |
a2889657 | 9415 | |
5f5c8ee5 GM |
9416 | /* Start displaying at the start of first_row_to_display. */ |
9417 | xassert (first_row_to_display->y < yb); | |
9418 | init_to_row_start (&it, w, first_row_to_display); | |
9419 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
9420 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
9421 | - nrows_scrolled); | |
9422 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
9423 | ||
9424 | /* Display lines beginning with first_row_to_display in the | |
9425 | desired matrix. Set last_text_row to the last row displayed | |
9426 | that displays text. */ | |
9427 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
9428 | if (pt_row == NULL) | |
9429 | w->cursor.vpos = -1; | |
9430 | last_text_row = NULL; | |
9431 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
9432 | if (display_line (&it)) | |
9433 | last_text_row = it.glyph_row - 1; | |
9434 | ||
9435 | /* Give up If point isn't in a row displayed or reused. */ | |
9436 | if (w->cursor.vpos < 0) | |
9437 | { | |
9438 | clear_glyph_matrix (w->desired_matrix); | |
9439 | return 0; | |
9440 | } | |
12adba34 | 9441 | |
5f5c8ee5 GM |
9442 | /* If point is in a reused row, adjust y and vpos of the cursor |
9443 | position. */ | |
9444 | if (pt_row) | |
9445 | { | |
9446 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
9447 | w->current_matrix); | |
9448 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
9449 | } |
9450 | ||
5f5c8ee5 GM |
9451 | /* Scroll the display. */ |
9452 | run.current_y = first_reusable_row->y; | |
045dee35 | 9453 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9454 | run.height = it.last_visible_y - run.current_y; |
9455 | if (run.height) | |
9456 | { | |
9457 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
9458 | update_begin (f); | |
9459 | rif->update_window_begin_hook (w); | |
9460 | rif->scroll_run_hook (w, &run); | |
9461 | rif->update_window_end_hook (w, 0); | |
9462 | update_end (f); | |
9463 | } | |
a2889657 | 9464 | |
5f5c8ee5 GM |
9465 | /* Adjust Y positions of reused rows. */ |
9466 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9467 | row = first_reusable_row; | |
9468 | dy = first_reusable_row->y; | |
045dee35 | 9469 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9470 | max_y = it.last_visible_y; |
9471 | while (row < first_row_to_display) | |
9472 | { | |
9473 | row->y -= dy; | |
9474 | if (row->y < min_y) | |
9475 | row->visible_height = row->height - (min_y - row->y); | |
9476 | else if (row->y + row->height > max_y) | |
9477 | row->visible_height | |
9478 | = row->height - (row->y + row->height - max_y); | |
9479 | else | |
9480 | row->visible_height = row->height; | |
9481 | ++row; | |
9482 | } | |
a2889657 | 9483 | |
5f5c8ee5 GM |
9484 | /* Disable rows not reused. */ |
9485 | while (row < bottom_row) | |
9486 | { | |
9487 | row->enabled_p = 0; | |
9488 | ++row; | |
9489 | } | |
9490 | ||
9491 | /* Scroll the current matrix. */ | |
9492 | xassert (nrows_scrolled > 0); | |
9493 | rotate_matrix (w->current_matrix, | |
9494 | start_vpos, | |
9495 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9496 | -nrows_scrolled); | |
9497 | ||
9498 | /* Adjust window end. A null value of last_text_row means that | |
9499 | the window end is in reused rows which in turn means that | |
9500 | only its vpos can have changed. */ | |
9501 | if (last_text_row) | |
9502 | { | |
9503 | w->window_end_bytepos | |
9504 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9505 | XSETFASTINT (w->window_end_pos, | |
9506 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9507 | XSETFASTINT (w->window_end_vpos, | |
9508 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9509 | } | |
9510 | else | |
a2889657 | 9511 | { |
e8e536a9 | 9512 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 9513 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 9514 | } |
5f5c8ee5 GM |
9515 | |
9516 | w->window_end_valid = Qnil; | |
9517 | w->desired_matrix->no_scrolling_p = 1; | |
9518 | ||
9519 | #if GLYPH_DEBUG | |
9520 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
9521 | #endif | |
9522 | return 1; | |
a2889657 | 9523 | } |
5f5c8ee5 GM |
9524 | |
9525 | return 0; | |
9526 | } | |
a2889657 | 9527 | |
a2889657 | 9528 | |
5f5c8ee5 GM |
9529 | \f |
9530 | /************************************************************************ | |
9531 | Window redisplay reusing current matrix when buffer has changed | |
9532 | ************************************************************************/ | |
9533 | ||
9534 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
9535 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
9536 | int *, int *)); | |
9537 | static struct glyph_row * | |
9538 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
9539 | struct glyph_row *)); | |
9540 | ||
9541 | ||
9542 | /* Return the last row in MATRIX displaying text. If row START is | |
9543 | non-null, start searching with that row. IT gives the dimensions | |
9544 | of the display. Value is null if matrix is empty; otherwise it is | |
9545 | a pointer to the row found. */ | |
9546 | ||
9547 | static struct glyph_row * | |
9548 | find_last_row_displaying_text (matrix, it, start) | |
9549 | struct glyph_matrix *matrix; | |
9550 | struct it *it; | |
9551 | struct glyph_row *start; | |
9552 | { | |
9553 | struct glyph_row *row, *row_found; | |
9554 | ||
9555 | /* Set row_found to the last row in IT->w's current matrix | |
9556 | displaying text. The loop looks funny but think of partially | |
9557 | visible lines. */ | |
9558 | row_found = NULL; | |
9559 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
9560 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9561 | { | |
9562 | xassert (row->enabled_p); | |
9563 | row_found = row; | |
9564 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
9565 | break; | |
9566 | ++row; | |
a2889657 | 9567 | } |
5f5c8ee5 GM |
9568 | |
9569 | return row_found; | |
9570 | } | |
9571 | ||
a2889657 | 9572 | |
5f5c8ee5 GM |
9573 | /* Return the last row in the current matrix of W that is not affected |
9574 | by changes at the start of current_buffer that occurred since the | |
9575 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 9576 | |
5f5c8ee5 GM |
9577 | The global variable beg_unchanged has to contain the number of |
9578 | bytes unchanged at the start of current_buffer. BEG + | |
9579 | beg_unchanged is the buffer position of the first changed byte in | |
9580 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
9581 | at the same buffer positions as they were when the current matrix | |
9582 | was built. */ | |
9583 | ||
9584 | static struct glyph_row * | |
9585 | get_last_unchanged_at_beg_row (w) | |
9586 | struct window *w; | |
9587 | { | |
9142dd5b | 9588 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
9589 | struct glyph_row *row; |
9590 | struct glyph_row *row_found = NULL; | |
9591 | int yb = window_text_bottom_y (w); | |
9592 | ||
9593 | /* Find the last row displaying unchanged text. */ | |
9594 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9595 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
9596 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 9597 | { |
5f5c8ee5 GM |
9598 | if (/* If row ends before first_changed_pos, it is unchanged, |
9599 | except in some case. */ | |
9600 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
9601 | /* When row ends in ZV and we write at ZV it is not | |
9602 | unchanged. */ | |
9603 | && !row->ends_at_zv_p | |
9604 | /* When first_changed_pos is the end of a continued line, | |
9605 | row is not unchanged because it may be no longer | |
9606 | continued. */ | |
9607 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
9608 | && row->continued_p)) | |
9609 | row_found = row; | |
9610 | ||
9611 | /* Stop if last visible row. */ | |
9612 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
9613 | break; | |
9614 | ||
9615 | ++row; | |
a2889657 JB |
9616 | } |
9617 | ||
5f5c8ee5 | 9618 | return row_found; |
a2889657 | 9619 | } |
5f5c8ee5 GM |
9620 | |
9621 | ||
9622 | /* Find the first glyph row in the current matrix of W that is not | |
9623 | affected by changes at the end of current_buffer since the last | |
9624 | time the window was redisplayed. Return in *DELTA the number of | |
c59c668a GM |
9625 | chars by which buffer positions in unchanged text at the end of |
9626 | current_buffer must be adjusted. Return in *DELTA_BYTES the | |
9627 | corresponding number of bytes. Value is null if no such row | |
9628 | exists, i.e. all rows are affected by changes. */ | |
5f5c8ee5 GM |
9629 | |
9630 | static struct glyph_row * | |
9631 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
9632 | struct window *w; | |
9633 | int *delta, *delta_bytes; | |
a2889657 | 9634 | { |
5f5c8ee5 GM |
9635 | struct glyph_row *row; |
9636 | struct glyph_row *row_found = NULL; | |
c581d710 | 9637 | |
5f5c8ee5 | 9638 | *delta = *delta_bytes = 0; |
b2a76982 | 9639 | |
5f5c8ee5 GM |
9640 | /* A value of window_end_pos >= end_unchanged means that the window |
9641 | end is in the range of changed text. If so, there is no | |
9642 | unchanged row at the end of W's current matrix. */ | |
9643 | xassert (!NILP (w->window_end_valid)); | |
9142dd5b | 9644 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
9645 | return NULL; |
9646 | ||
9647 | /* Set row to the last row in W's current matrix displaying text. */ | |
9648 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9649 | ||
5f5c8ee5 GM |
9650 | /* If matrix is entirely empty, no unchanged row exists. */ |
9651 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9652 | { | |
9653 | /* The value of row is the last glyph row in the matrix having a | |
9654 | meaningful buffer position in it. The end position of row | |
9655 | corresponds to window_end_pos. This allows us to translate | |
9656 | buffer positions in the current matrix to current buffer | |
9657 | positions for characters not in changed text. */ | |
9658 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
9659 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
9660 | int last_unchanged_pos, last_unchanged_pos_old; | |
9661 | struct glyph_row *first_text_row | |
9662 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9663 | ||
9664 | *delta = Z - Z_old; | |
9665 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
9666 | ||
9667 | /* Set last_unchanged_pos to the buffer position of the last | |
9668 | character in the buffer that has not been changed. Z is the | |
9669 | index + 1 of the last byte in current_buffer, i.e. by | |
9670 | subtracting end_unchanged we get the index of the last | |
9671 | unchanged character, and we have to add BEG to get its buffer | |
9672 | position. */ | |
9142dd5b | 9673 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
9674 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
9675 | ||
9676 | /* Search backward from ROW for a row displaying a line that | |
9677 | starts at a minimum position >= last_unchanged_pos_old. */ | |
9678 | while (row >= first_text_row) | |
9679 | { | |
9680 | xassert (row->enabled_p); | |
9681 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9682 | ||
9683 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
9684 | row_found = row; | |
9685 | --row; | |
9686 | } | |
9687 | } | |
9688 | ||
9689 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
9690 | return row_found; | |
c581d710 RS |
9691 | } |
9692 | ||
c581d710 | 9693 | |
5f5c8ee5 GM |
9694 | /* Make sure that glyph rows in the current matrix of window W |
9695 | reference the same glyph memory as corresponding rows in the | |
9696 | frame's frame matrix. This function is called after scrolling W's | |
9697 | current matrix on a terminal frame in try_window_id and | |
9698 | try_window_reusing_current_matrix. */ | |
9699 | ||
9700 | static void | |
9701 | sync_frame_with_window_matrix_rows (w) | |
9702 | struct window *w; | |
c581d710 | 9703 | { |
5f5c8ee5 GM |
9704 | struct frame *f = XFRAME (w->frame); |
9705 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
9706 | ||
9707 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
9708 | must have a frame matrix. */ | |
9709 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
9710 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
9711 | xassert (!FRAME_WINDOW_P (f)); | |
9712 | ||
9713 | /* If W is a full-width window, glyph pointers in W's current matrix | |
9714 | have, by definition, to be the same as glyph pointers in the | |
9715 | corresponding frame matrix. */ | |
9716 | window_row = w->current_matrix->rows; | |
9717 | window_row_end = window_row + w->current_matrix->nrows; | |
9718 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
9719 | while (window_row < window_row_end) | |
659a218f | 9720 | { |
5f5c8ee5 | 9721 | int area; |
f002db93 | 9722 | |
5f5c8ee5 GM |
9723 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) |
9724 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
f002db93 GM |
9725 | |
9726 | /* Disable frame rows whose corresponding window rows have | |
9727 | been disabled in try_window_id. */ | |
9728 | if (!window_row->enabled_p) | |
9729 | frame_row->enabled_p = 0; | |
9730 | ||
5f5c8ee5 | 9731 | ++window_row, ++frame_row; |
659a218f | 9732 | } |
a2889657 | 9733 | } |
5f5c8ee5 GM |
9734 | |
9735 | ||
e037b9ec GM |
9736 | /* Find the glyph row in window W containing CHARPOS. Consider all |
9737 | rows between START and END (not inclusive). END null means search | |
9738 | all rows to the end of the display area of W. Value is the row | |
9739 | containing CHARPOS or null. */ | |
9740 | ||
9741 | static struct glyph_row * | |
9742 | row_containing_pos (w, charpos, start, end) | |
9743 | struct window *w; | |
9744 | int charpos; | |
9745 | struct glyph_row *start, *end; | |
9746 | { | |
9747 | struct glyph_row *row = start; | |
9748 | int last_y; | |
9749 | ||
9750 | /* If we happen to start on a header-line, skip that. */ | |
9751 | if (row->mode_line_p) | |
9752 | ++row; | |
9753 | ||
9754 | if ((end && row >= end) || !row->enabled_p) | |
9755 | return NULL; | |
9756 | ||
9757 | last_y = window_text_bottom_y (w); | |
9758 | ||
9759 | while ((end == NULL || row < end) | |
9760 | && (MATRIX_ROW_END_CHARPOS (row) < charpos | |
9761 | /* The end position of a row equals the start | |
9762 | position of the next row. If CHARPOS is there, we | |
9763 | would rather display it in the next line, except | |
9764 | when this line ends in ZV. */ | |
9765 | || (MATRIX_ROW_END_CHARPOS (row) == charpos | |
9766 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
9767 | || !row->ends_at_zv_p))) | |
9768 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
9769 | ++row; | |
9770 | ||
9771 | /* Give up if CHARPOS not found. */ | |
9772 | if ((end && row >= end) | |
9773 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
9774 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
9775 | row = NULL; | |
9776 | ||
9777 | return row; | |
9778 | } | |
9779 | ||
9780 | ||
5f5c8ee5 GM |
9781 | /* Try to redisplay window W by reusing its existing display. W's |
9782 | current matrix must be up to date when this function is called, | |
9783 | i.e. window_end_valid must not be nil. | |
9784 | ||
9785 | Value is | |
9786 | ||
9787 | 1 if display has been updated | |
9788 | 0 if otherwise unsuccessful | |
9789 | -1 if redisplay with same window start is known not to succeed | |
9790 | ||
9791 | The following steps are performed: | |
9792 | ||
9793 | 1. Find the last row in the current matrix of W that is not | |
9794 | affected by changes at the start of current_buffer. If no such row | |
9795 | is found, give up. | |
9796 | ||
9797 | 2. Find the first row in W's current matrix that is not affected by | |
9798 | changes at the end of current_buffer. Maybe there is no such row. | |
9799 | ||
9800 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
9801 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
9802 | the window. | |
9803 | ||
9804 | 4. If cursor is not known to appear on the window, give up. | |
9805 | ||
9806 | 5. If display stopped at the row found in step 2, scroll the | |
9807 | display and current matrix as needed. | |
9808 | ||
9809 | 6. Maybe display some lines at the end of W, if we must. This can | |
9810 | happen under various circumstances, like a partially visible line | |
9811 | becoming fully visible, or because newly displayed lines are displayed | |
9812 | in smaller font sizes. | |
9813 | ||
9814 | 7. Update W's window end information. */ | |
9815 | ||
9816 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
9817 | |
9818 | static int | |
5f5c8ee5 | 9819 | try_window_id (w) |
12adba34 | 9820 | struct window *w; |
12adba34 | 9821 | { |
5f5c8ee5 GM |
9822 | struct frame *f = XFRAME (w->frame); |
9823 | struct glyph_matrix *current_matrix = w->current_matrix; | |
9824 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
9825 | struct glyph_row *last_unchanged_at_beg_row; | |
9826 | struct glyph_row *first_unchanged_at_end_row; | |
9827 | struct glyph_row *row; | |
9828 | struct glyph_row *bottom_row; | |
9829 | int bottom_vpos; | |
9830 | struct it it; | |
9831 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
9832 | struct text_pos start_pos; | |
9833 | struct run run; | |
9834 | int first_unchanged_at_end_vpos = 0; | |
9835 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
9836 | struct text_pos start; | |
9837 | ||
9838 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
9839 | ||
9840 | /* Check pre-conditions. Window end must be valid, otherwise | |
9841 | the current matrix would not be up to date. */ | |
9842 | xassert (!NILP (w->window_end_valid)); | |
9843 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
9844 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
9845 | ||
9846 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
9847 | only if buffer has really changed. The reason is that the gap is | |
9848 | initially at Z for freshly visited files. The code below would | |
9849 | set end_unchanged to 0 in that case. */ | |
9850 | if (MODIFF > SAVE_MODIFF) | |
9851 | { | |
9142dd5b GM |
9852 | if (GPT - BEG < BEG_UNCHANGED) |
9853 | BEG_UNCHANGED = GPT - BEG; | |
9854 | if (Z - GPT < END_UNCHANGED) | |
9855 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 GM |
9856 | } |
9857 | ||
9858 | /* If window starts after a line end, and the last change is in | |
9859 | front of that newline, then changes don't affect the display. | |
9860 | This case happens with stealth-fontification. */ | |
9861 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9862 | if (CHARPOS (start) > BEGV | |
9142dd5b | 9863 | && Z - END_UNCHANGED < CHARPOS (start) - 1 |
5f5c8ee5 GM |
9864 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' |
9865 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9866 | { | |
9867 | /* We have to update window end positions because the buffer's | |
9868 | size has changed. */ | |
9869 | w->window_end_pos | |
9870 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9871 | w->window_end_bytepos | |
9872 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9873 | return 1; | |
9874 | } | |
9875 | ||
9876 | /* Return quickly if changes are all below what is displayed in the | |
9877 | window, and if PT is in the window. */ | |
9142dd5b | 9878 | if (BEG_UNCHANGED > MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 GM |
9879 | && PT < MATRIX_ROW_END_CHARPOS (row)) |
9880 | { | |
9881 | /* We have to update window end positions because the buffer's | |
9882 | size has changed. */ | |
9883 | w->window_end_pos | |
9884 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
9885 | w->window_end_bytepos | |
9886 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
9887 | return 1; | |
9888 | } | |
9889 | ||
9890 | /* Check that window start agrees with the start of the first glyph | |
9891 | row in its current matrix. Check this after we know the window | |
9892 | start is not in changed text, otherwise positions would not be | |
9893 | comparable. */ | |
9894 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9895 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
9896 | return 0; | |
9897 | ||
5f5c8ee5 GM |
9898 | /* Compute the position at which we have to start displaying new |
9899 | lines. Some of the lines at the top of the window might be | |
9900 | reusable because they are not displaying changed text. Find the | |
9901 | last row in W's current matrix not affected by changes at the | |
9902 | start of current_buffer. Value is null if changes start in the | |
9903 | first line of window. */ | |
9904 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
9905 | if (last_unchanged_at_beg_row) | |
9906 | { | |
9907 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
9908 | start_pos = it.current.pos; | |
9909 | ||
9910 | /* Start displaying new lines in the desired matrix at the same | |
9911 | vpos we would use in the current matrix, i.e. below | |
9912 | last_unchanged_at_beg_row. */ | |
9913 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
9914 | current_matrix); | |
9915 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
9916 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
9917 | ||
9918 | xassert (it.hpos == 0 && it.current_x == 0); | |
9919 | } | |
9920 | else | |
9921 | { | |
9922 | /* There are no reusable lines at the start of the window. | |
9923 | Start displaying in the first line. */ | |
9924 | start_display (&it, w, start); | |
9925 | start_pos = it.current.pos; | |
9926 | } | |
9927 | ||
5f5c8ee5 GM |
9928 | /* Find the first row that is not affected by changes at the end of |
9929 | the buffer. Value will be null if there is no unchanged row, in | |
9930 | which case we must redisplay to the end of the window. delta | |
9931 | will be set to the value by which buffer positions beginning with | |
9932 | first_unchanged_at_end_row have to be adjusted due to text | |
9933 | changes. */ | |
9934 | first_unchanged_at_end_row | |
9935 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
9936 | IF_DEBUG (debug_delta = delta); | |
9937 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
9938 | ||
9939 | /* Set stop_pos to the buffer position up to which we will have to | |
9940 | display new lines. If first_unchanged_at_end_row != NULL, this | |
9941 | is the buffer position of the start of the line displayed in that | |
9942 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
9943 | that we don't stop at a buffer position. */ | |
9944 | stop_pos = 0; | |
9945 | if (first_unchanged_at_end_row) | |
9946 | { | |
9947 | xassert (last_unchanged_at_beg_row == NULL | |
9948 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
9949 | ||
9950 | /* If this is a continuation line, move forward to the next one | |
9951 | that isn't. Changes in lines above affect this line. | |
9952 | Caution: this may move first_unchanged_at_end_row to a row | |
9953 | not displaying text. */ | |
9954 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
9955 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9956 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9957 | < it.last_visible_y)) | |
9958 | ++first_unchanged_at_end_row; | |
9959 | ||
9960 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
9961 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
9962 | >= it.last_visible_y)) | |
9963 | first_unchanged_at_end_row = NULL; | |
9964 | else | |
9965 | { | |
9966 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
9967 | + delta); | |
9968 | first_unchanged_at_end_vpos | |
9969 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 9970 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
9971 | } |
9972 | } | |
9973 | else if (last_unchanged_at_beg_row == NULL) | |
9974 | return 0; | |
9975 | ||
9976 | ||
9977 | #if GLYPH_DEBUG | |
9978 | ||
9979 | /* Either there is no unchanged row at the end, or the one we have | |
9980 | now displays text. This is a necessary condition for the window | |
9981 | end pos calculation at the end of this function. */ | |
9982 | xassert (first_unchanged_at_end_row == NULL | |
9983 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
9984 | ||
9985 | debug_last_unchanged_at_beg_vpos | |
9986 | = (last_unchanged_at_beg_row | |
9987 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
9988 | : -1); | |
9989 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
9990 | ||
9991 | #endif /* GLYPH_DEBUG != 0 */ | |
9992 | ||
9993 | ||
9994 | /* Display new lines. Set last_text_row to the last new line | |
9995 | displayed which has text on it, i.e. might end up as being the | |
9996 | line where the window_end_vpos is. */ | |
9997 | w->cursor.vpos = -1; | |
9998 | last_text_row = NULL; | |
9999 | overlay_arrow_seen = 0; | |
10000 | while (it.current_y < it.last_visible_y | |
10001 | && !fonts_changed_p | |
10002 | && (first_unchanged_at_end_row == NULL | |
10003 | || IT_CHARPOS (it) < stop_pos)) | |
10004 | { | |
10005 | if (display_line (&it)) | |
10006 | last_text_row = it.glyph_row - 1; | |
10007 | } | |
10008 | ||
10009 | if (fonts_changed_p) | |
10010 | return -1; | |
10011 | ||
10012 | ||
10013 | /* Compute differences in buffer positions, y-positions etc. for | |
10014 | lines reused at the bottom of the window. Compute what we can | |
10015 | scroll. */ | |
ca42b2e8 GM |
10016 | if (first_unchanged_at_end_row |
10017 | /* No lines reused because we displayed everything up to the | |
10018 | bottom of the window. */ | |
10019 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
10020 | { |
10021 | dvpos = (it.vpos | |
10022 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
10023 | current_matrix)); | |
10024 | dy = it.current_y - first_unchanged_at_end_row->y; | |
10025 | run.current_y = first_unchanged_at_end_row->y; | |
10026 | run.desired_y = run.current_y + dy; | |
10027 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
10028 | } | |
10029 | else | |
ca42b2e8 GM |
10030 | { |
10031 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
10032 | first_unchanged_at_end_row = NULL; | |
10033 | } | |
5f5c8ee5 GM |
10034 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
10035 | ||
8f8ba186 | 10036 | |
5f5c8ee5 GM |
10037 | /* Find the cursor if not already found. We have to decide whether |
10038 | PT will appear on this window (it sometimes doesn't, but this is | |
10039 | not a very frequent case.) This decision has to be made before | |
10040 | the current matrix is altered. A value of cursor.vpos < 0 means | |
10041 | that PT is either in one of the lines beginning at | |
10042 | first_unchanged_at_end_row or below the window. Don't care for | |
10043 | lines that might be displayed later at the window end; as | |
10044 | mentioned, this is not a frequent case. */ | |
10045 | if (w->cursor.vpos < 0) | |
10046 | { | |
5f5c8ee5 GM |
10047 | /* Cursor in unchanged rows at the top? */ |
10048 | if (PT < CHARPOS (start_pos) | |
10049 | && last_unchanged_at_beg_row) | |
10050 | { | |
e037b9ec GM |
10051 | row = row_containing_pos (w, PT, |
10052 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
10053 | last_unchanged_at_beg_row + 1); | |
10054 | xassert (row && row <= last_unchanged_at_beg_row); | |
5f5c8ee5 GM |
10055 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); |
10056 | } | |
10057 | ||
10058 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
10059 | else if (first_unchanged_at_end_row) | |
10060 | { | |
e037b9ec GM |
10061 | row = row_containing_pos (w, PT - delta, |
10062 | first_unchanged_at_end_row, NULL); | |
10063 | if (row) | |
468155d7 GM |
10064 | set_cursor_from_row (w, row, w->current_matrix, delta, |
10065 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
10066 | } |
10067 | ||
10068 | /* Give up if cursor was not found. */ | |
10069 | if (w->cursor.vpos < 0) | |
10070 | { | |
10071 | clear_glyph_matrix (w->desired_matrix); | |
10072 | return -1; | |
10073 | } | |
10074 | } | |
10075 | ||
10076 | /* Don't let the cursor end in the scroll margins. */ | |
10077 | { | |
10078 | int this_scroll_margin, cursor_height; | |
10079 | ||
10080 | this_scroll_margin = max (0, scroll_margin); | |
10081 | this_scroll_margin = min (this_scroll_margin, | |
10082 | XFASTINT (w->height) / 4); | |
10083 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
10084 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
10085 | ||
10086 | if ((w->cursor.y < this_scroll_margin | |
10087 | && CHARPOS (start) > BEGV) | |
10088 | /* Don't take scroll margin into account at the bottom because | |
10089 | old redisplay didn't do it either. */ | |
10090 | || w->cursor.y + cursor_height > it.last_visible_y) | |
10091 | { | |
10092 | w->cursor.vpos = -1; | |
10093 | clear_glyph_matrix (w->desired_matrix); | |
10094 | return -1; | |
10095 | } | |
10096 | } | |
10097 | ||
10098 | /* Scroll the display. Do it before changing the current matrix so | |
10099 | that xterm.c doesn't get confused about where the cursor glyph is | |
10100 | found. */ | |
10101 | if (dy) | |
10102 | { | |
10103 | update_begin (f); | |
10104 | ||
10105 | if (FRAME_WINDOW_P (f)) | |
10106 | { | |
10107 | rif->update_window_begin_hook (w); | |
10108 | rif->scroll_run_hook (w, &run); | |
10109 | rif->update_window_end_hook (w, 0); | |
10110 | } | |
10111 | else | |
10112 | { | |
10113 | /* Terminal frame. In this case, dvpos gives the number of | |
10114 | lines to scroll by; dvpos < 0 means scroll up. */ | |
10115 | int first_unchanged_at_end_vpos | |
10116 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
10117 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
10118 | int end = XFASTINT (w->top) + window_internal_height (w); | |
10119 | ||
10120 | /* Perform the operation on the screen. */ | |
10121 | if (dvpos > 0) | |
10122 | { | |
10123 | /* Scroll last_unchanged_at_beg_row to the end of the | |
10124 | window down dvpos lines. */ | |
10125 | set_terminal_window (end); | |
10126 | ||
10127 | /* On dumb terminals delete dvpos lines at the end | |
10128 | before inserting dvpos empty lines. */ | |
10129 | if (!scroll_region_ok) | |
10130 | ins_del_lines (end - dvpos, -dvpos); | |
10131 | ||
10132 | /* Insert dvpos empty lines in front of | |
10133 | last_unchanged_at_beg_row. */ | |
10134 | ins_del_lines (from, dvpos); | |
10135 | } | |
10136 | else if (dvpos < 0) | |
10137 | { | |
10138 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
10139 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
10140 | set_terminal_window (end); | |
10141 | ||
10142 | /* Delete dvpos lines in front of | |
10143 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
10144 | the cursor to the given vpos and emit |dvpos| delete | |
10145 | line sequences. */ | |
10146 | ins_del_lines (from + dvpos, dvpos); | |
10147 | ||
10148 | /* On a dumb terminal insert dvpos empty lines at the | |
10149 | end. */ | |
10150 | if (!scroll_region_ok) | |
10151 | ins_del_lines (end + dvpos, -dvpos); | |
10152 | } | |
10153 | ||
10154 | set_terminal_window (0); | |
10155 | } | |
10156 | ||
10157 | update_end (f); | |
10158 | } | |
10159 | ||
ca42b2e8 GM |
10160 | /* Shift reused rows of the current matrix to the right position. |
10161 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
10162 | text. */ | |
10163 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
10164 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
10165 | if (dvpos < 0) |
10166 | { | |
10167 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
10168 | bottom_vpos, dvpos); | |
10169 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
10170 | bottom_vpos, 0); | |
10171 | } | |
10172 | else if (dvpos > 0) | |
10173 | { | |
10174 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
10175 | bottom_vpos, dvpos); | |
10176 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
10177 | first_unchanged_at_end_vpos + dvpos, 0); | |
10178 | } | |
10179 | ||
10180 | /* For frame-based redisplay, make sure that current frame and window | |
10181 | matrix are in sync with respect to glyph memory. */ | |
10182 | if (!FRAME_WINDOW_P (f)) | |
10183 | sync_frame_with_window_matrix_rows (w); | |
10184 | ||
10185 | /* Adjust buffer positions in reused rows. */ | |
10186 | if (delta) | |
10187 | increment_glyph_matrix_buffer_positions (current_matrix, | |
10188 | first_unchanged_at_end_vpos + dvpos, | |
10189 | bottom_vpos, delta, delta_bytes); | |
10190 | ||
10191 | /* Adjust Y positions. */ | |
10192 | if (dy) | |
10193 | shift_glyph_matrix (w, current_matrix, | |
10194 | first_unchanged_at_end_vpos + dvpos, | |
10195 | bottom_vpos, dy); | |
10196 | ||
10197 | if (first_unchanged_at_end_row) | |
10198 | first_unchanged_at_end_row += dvpos; | |
10199 | ||
10200 | /* If scrolling up, there may be some lines to display at the end of | |
10201 | the window. */ | |
10202 | last_text_row_at_end = NULL; | |
10203 | if (dy < 0) | |
10204 | { | |
10205 | /* Set last_row to the glyph row in the current matrix where the | |
10206 | window end line is found. It has been moved up or down in | |
10207 | the matrix by dvpos. */ | |
10208 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
10209 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
10210 | ||
10211 | /* If last_row is the window end line, it should display text. */ | |
10212 | xassert (last_row->displays_text_p); | |
10213 | ||
10214 | /* If window end line was partially visible before, begin | |
10215 | displaying at that line. Otherwise begin displaying with the | |
10216 | line following it. */ | |
10217 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
10218 | { | |
10219 | init_to_row_start (&it, w, last_row); | |
10220 | it.vpos = last_vpos; | |
10221 | it.current_y = last_row->y; | |
10222 | } | |
10223 | else | |
10224 | { | |
10225 | init_to_row_end (&it, w, last_row); | |
10226 | it.vpos = 1 + last_vpos; | |
10227 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
10228 | ++last_row; | |
10229 | } | |
12adba34 | 10230 | |
5f5c8ee5 GM |
10231 | /* We may start in a continuation line. If so, we have to get |
10232 | the right continuation_lines_width and current_x. */ | |
10233 | it.continuation_lines_width = last_row->continuation_lines_width; | |
10234 | it.hpos = it.current_x = 0; | |
10235 | ||
10236 | /* Display the rest of the lines at the window end. */ | |
10237 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10238 | while (it.current_y < it.last_visible_y | |
10239 | && !fonts_changed_p) | |
10240 | { | |
10241 | /* Is it always sure that the display agrees with lines in | |
10242 | the current matrix? I don't think so, so we mark rows | |
10243 | displayed invalid in the current matrix by setting their | |
10244 | enabled_p flag to zero. */ | |
10245 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
10246 | if (display_line (&it)) | |
10247 | last_text_row_at_end = it.glyph_row - 1; | |
10248 | } | |
10249 | } | |
12adba34 | 10250 | |
5f5c8ee5 GM |
10251 | /* Update window_end_pos and window_end_vpos. */ |
10252 | if (first_unchanged_at_end_row | |
10253 | && first_unchanged_at_end_row->y < it.last_visible_y | |
10254 | && !last_text_row_at_end) | |
10255 | { | |
10256 | /* Window end line if one of the preserved rows from the current | |
10257 | matrix. Set row to the last row displaying text in current | |
10258 | matrix starting at first_unchanged_at_end_row, after | |
10259 | scrolling. */ | |
10260 | xassert (first_unchanged_at_end_row->displays_text_p); | |
10261 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
10262 | first_unchanged_at_end_row); | |
10263 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
10264 | ||
10265 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
10266 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
10267 | XSETFASTINT (w->window_end_vpos, | |
10268 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
10269 | } | |
10270 | else if (last_text_row_at_end) | |
10271 | { | |
10272 | XSETFASTINT (w->window_end_pos, | |
10273 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
10274 | w->window_end_bytepos | |
10275 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
10276 | XSETFASTINT (w->window_end_vpos, | |
10277 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
10278 | } | |
10279 | else if (last_text_row) | |
10280 | { | |
10281 | /* We have displayed either to the end of the window or at the | |
10282 | end of the window, i.e. the last row with text is to be found | |
10283 | in the desired matrix. */ | |
10284 | XSETFASTINT (w->window_end_pos, | |
10285 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10286 | w->window_end_bytepos | |
10287 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
10288 | XSETFASTINT (w->window_end_vpos, | |
10289 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
10290 | } | |
10291 | else if (first_unchanged_at_end_row == NULL | |
10292 | && last_text_row == NULL | |
10293 | && last_text_row_at_end == NULL) | |
10294 | { | |
10295 | /* Displayed to end of window, but no line containing text was | |
10296 | displayed. Lines were deleted at the end of the window. */ | |
10297 | int vpos; | |
045dee35 | 10298 | int header_line_p = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
10299 | |
10300 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
045dee35 GM |
10301 | if ((w->desired_matrix->rows[vpos + header_line_p].enabled_p |
10302 | && w->desired_matrix->rows[vpos + header_line_p].displays_text_p) | |
10303 | || (!w->desired_matrix->rows[vpos + header_line_p].enabled_p | |
10304 | && w->current_matrix->rows[vpos + header_line_p].displays_text_p)) | |
5f5c8ee5 | 10305 | break; |
12adba34 | 10306 | |
5f5c8ee5 GM |
10307 | w->window_end_vpos = make_number (vpos); |
10308 | } | |
10309 | else | |
10310 | abort (); | |
10311 | ||
10312 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
10313 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 10314 | |
5f5c8ee5 GM |
10315 | /* Record that display has not been completed. */ |
10316 | w->window_end_valid = Qnil; | |
10317 | w->desired_matrix->no_scrolling_p = 1; | |
10318 | return 1; | |
12adba34 | 10319 | } |
0f9c0ff0 | 10320 | |
a2889657 | 10321 | |
5f5c8ee5 GM |
10322 | \f |
10323 | /*********************************************************************** | |
10324 | More debugging support | |
10325 | ***********************************************************************/ | |
a2889657 | 10326 | |
5f5c8ee5 | 10327 | #if GLYPH_DEBUG |
a2889657 | 10328 | |
5f5c8ee5 GM |
10329 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
10330 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 10331 | |
31b24551 | 10332 | |
5f5c8ee5 GM |
10333 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
10334 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 10335 | |
5f5c8ee5 GM |
10336 | void |
10337 | dump_glyph_matrix (matrix, with_glyphs_p) | |
10338 | struct glyph_matrix *matrix; | |
10339 | int with_glyphs_p; | |
10340 | { | |
efc63ef0 | 10341 | int i; |
5f5c8ee5 GM |
10342 | for (i = 0; i < matrix->nrows; ++i) |
10343 | dump_glyph_row (matrix, i, with_glyphs_p); | |
10344 | } | |
31b24551 | 10345 | |
68a37fa8 | 10346 | |
5f5c8ee5 GM |
10347 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
10348 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 10349 | |
5f5c8ee5 GM |
10350 | void |
10351 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
10352 | struct glyph_matrix *matrix; | |
10353 | int vpos, with_glyphs_p; | |
10354 | { | |
10355 | struct glyph_row *row; | |
10356 | ||
10357 | if (vpos < 0 || vpos >= matrix->nrows) | |
10358 | return; | |
10359 | ||
10360 | row = MATRIX_ROW (matrix, vpos); | |
10361 | ||
10362 | fprintf (stderr, "Row Start End Used oEI><O\\CTZF X Y W\n"); | |
10363 | fprintf (stderr, "=============================================\n"); | |
10364 | ||
10365 | 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", | |
10366 | row - matrix->rows, | |
10367 | MATRIX_ROW_START_CHARPOS (row), | |
10368 | MATRIX_ROW_END_CHARPOS (row), | |
10369 | row->used[TEXT_AREA], | |
10370 | row->contains_overlapping_glyphs_p, | |
10371 | row->enabled_p, | |
10372 | row->inverse_p, | |
10373 | row->truncated_on_left_p, | |
10374 | row->truncated_on_right_p, | |
10375 | row->overlay_arrow_p, | |
10376 | row->continued_p, | |
10377 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
10378 | row->displays_text_p, | |
10379 | row->ends_at_zv_p, | |
10380 | row->fill_line_p, | |
10381 | row->x, | |
10382 | row->y, | |
10383 | row->pixel_width); | |
10384 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, | |
10385 | row->end.overlay_string_index); | |
10386 | fprintf (stderr, "%9d %5d\n", | |
10387 | CHARPOS (row->start.string_pos), | |
10388 | CHARPOS (row->end.string_pos)); | |
10389 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
10390 | row->end.dpvec_index); | |
10391 | ||
10392 | if (with_glyphs_p) | |
bd66d1ba | 10393 | { |
5f5c8ee5 GM |
10394 | struct glyph *glyph, *glyph_end; |
10395 | int prev_had_glyphs_p; | |
10396 | ||
10397 | glyph = row->glyphs[TEXT_AREA]; | |
10398 | glyph_end = glyph + row->used[TEXT_AREA]; | |
10399 | ||
10400 | /* Glyph for a line end in text. */ | |
10401 | if (glyph == glyph_end && glyph->charpos > 0) | |
10402 | ++glyph_end; | |
10403 | ||
10404 | if (glyph < glyph_end) | |
bd66d1ba | 10405 | { |
5f5c8ee5 GM |
10406 | fprintf (stderr, " Glyph Type Pos W Code C Face LR\n"); |
10407 | prev_had_glyphs_p = 1; | |
bd66d1ba RS |
10408 | } |
10409 | else | |
5f5c8ee5 GM |
10410 | prev_had_glyphs_p = 0; |
10411 | ||
10412 | while (glyph < glyph_end) | |
f7b4b63a | 10413 | { |
5f5c8ee5 GM |
10414 | if (glyph->type == CHAR_GLYPH) |
10415 | { | |
10416 | fprintf (stderr, | |
10417 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10418 | glyph - row->glyphs[TEXT_AREA], | |
10419 | 'C', | |
10420 | glyph->charpos, | |
10421 | glyph->pixel_width, | |
10422 | glyph->u.ch.code, | |
10423 | (glyph->u.ch.code < 0x80 && glyph->u.ch.code >= ' ' | |
10424 | ? glyph->u.ch.code | |
10425 | : '.'), | |
10426 | glyph->u.ch.face_id, | |
10427 | glyph->left_box_line_p, | |
10428 | glyph->right_box_line_p); | |
10429 | } | |
10430 | else if (glyph->type == STRETCH_GLYPH) | |
10431 | { | |
10432 | fprintf (stderr, | |
10433 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10434 | glyph - row->glyphs[TEXT_AREA], | |
10435 | 'S', | |
10436 | glyph->charpos, | |
10437 | glyph->pixel_width, | |
10438 | 0, | |
10439 | '.', | |
10440 | glyph->u.stretch.face_id, | |
10441 | glyph->left_box_line_p, | |
10442 | glyph->right_box_line_p); | |
10443 | } | |
10444 | else if (glyph->type == IMAGE_GLYPH) | |
10445 | { | |
10446 | fprintf (stderr, | |
10447 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10448 | glyph - row->glyphs[TEXT_AREA], | |
10449 | 'I', | |
10450 | glyph->charpos, | |
10451 | glyph->pixel_width, | |
10452 | glyph->u.img.id, | |
10453 | '.', | |
10454 | glyph->u.img.face_id, | |
10455 | glyph->left_box_line_p, | |
10456 | glyph->right_box_line_p); | |
10457 | } | |
10458 | ++glyph; | |
f7b4b63a | 10459 | } |
f4faa47c | 10460 | } |
5f5c8ee5 | 10461 | } |
f4faa47c | 10462 | |
a2889657 | 10463 | |
5f5c8ee5 GM |
10464 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
10465 | Sdump_glyph_matrix, 0, 1, "p", | |
10466 | "Dump the current matrix of the selected window to stderr.\n\ | |
10467 | Shows contents of glyph row structures. With non-nil optional\n\ | |
10468 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
10469 | (with_glyphs_p) | |
10470 | { | |
10471 | struct window *w = XWINDOW (selected_window); | |
10472 | struct buffer *buffer = XBUFFER (w->buffer); | |
10473 | ||
10474 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
10475 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
10476 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
10477 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
10478 | fprintf (stderr, "=============================================\n"); | |
10479 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
10480 | return Qnil; | |
10481 | } | |
1c2250c2 | 10482 | |
1fca3fae | 10483 | |
5f5c8ee5 GM |
10484 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
10485 | "Dump glyph row ROW to stderr.") | |
10486 | (row) | |
10487 | Lisp_Object row; | |
10488 | { | |
10489 | CHECK_NUMBER (row, 0); | |
10490 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
10491 | return Qnil; | |
10492 | } | |
1fca3fae | 10493 | |
67481ae5 | 10494 | |
e037b9ec | 10495 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, |
5f5c8ee5 GM |
10496 | 0, 0, "", "") |
10497 | () | |
10498 | { | |
886bd6f2 GM |
10499 | struct frame *sf = SELECTED_FRAME (); |
10500 | struct glyph_matrix *m = (XWINDOW (sf->tool_bar_window) | |
5f5c8ee5 GM |
10501 | ->current_matrix); |
10502 | dump_glyph_row (m, 0, 1); | |
10503 | return Qnil; | |
10504 | } | |
ca26e1c8 | 10505 | |
0f9c0ff0 | 10506 | |
5f5c8ee5 GM |
10507 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
10508 | Strace_redisplay_toggle, 0, 0, "", | |
10509 | "Toggle tracing of redisplay.") | |
10510 | () | |
10511 | { | |
10512 | trace_redisplay_p = !trace_redisplay_p; | |
10513 | return Qnil; | |
10514 | } | |
10515 | ||
10516 | ||
10517 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 10518 | |
ca26e1c8 | 10519 | |
5f5c8ee5 GM |
10520 | \f |
10521 | /*********************************************************************** | |
10522 | Building Desired Matrix Rows | |
10523 | ***********************************************************************/ | |
a2889657 | 10524 | |
5f5c8ee5 GM |
10525 | /* Return a temporary glyph row holding the glyphs of an overlay |
10526 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 10527 | |
5f5c8ee5 GM |
10528 | static struct glyph_row * |
10529 | get_overlay_arrow_glyph_row (w) | |
10530 | struct window *w; | |
10531 | { | |
10532 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
10533 | struct buffer *buffer = XBUFFER (w->buffer); | |
10534 | struct buffer *old = current_buffer; | |
10535 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
10536 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
10537 | unsigned char *arrow_end = arrow_string + arrow_len; | |
10538 | unsigned char *p; | |
10539 | struct it it; | |
10540 | int multibyte_p; | |
10541 | int n_glyphs_before; | |
10542 | ||
10543 | set_buffer_temp (buffer); | |
10544 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
10545 | it.glyph_row->used[TEXT_AREA] = 0; | |
10546 | SET_TEXT_POS (it.position, 0, 0); | |
10547 | ||
10548 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
10549 | p = arrow_string; | |
10550 | while (p < arrow_end) | |
10551 | { | |
10552 | Lisp_Object face, ilisp; | |
10553 | ||
10554 | /* Get the next character. */ | |
10555 | if (multibyte_p) | |
4fdb80f2 | 10556 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
10557 | else |
10558 | it.c = *p, it.len = 1; | |
10559 | p += it.len; | |
10560 | ||
10561 | /* Get its face. */ | |
10562 | XSETFASTINT (ilisp, p - arrow_string); | |
10563 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
10564 | it.face_id = compute_char_face (f, it.c, face); | |
10565 | ||
10566 | /* Compute its width, get its glyphs. */ | |
10567 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 10568 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
10569 | PRODUCE_GLYPHS (&it); |
10570 | ||
10571 | /* If this character doesn't fit any more in the line, we have | |
10572 | to remove some glyphs. */ | |
10573 | if (it.current_x > it.last_visible_x) | |
10574 | { | |
10575 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
10576 | break; | |
10577 | } | |
10578 | } | |
10579 | ||
10580 | set_buffer_temp (old); | |
10581 | return it.glyph_row; | |
10582 | } | |
ca26e1c8 | 10583 | |
b0a0fbda | 10584 | |
5f5c8ee5 GM |
10585 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
10586 | glyphs are only inserted for terminal frames since we can't really | |
10587 | win with truncation glyphs when partially visible glyphs are | |
10588 | involved. Which glyphs to insert is determined by | |
10589 | produce_special_glyphs. */ | |
67481ae5 | 10590 | |
5f5c8ee5 GM |
10591 | static void |
10592 | insert_left_trunc_glyphs (it) | |
10593 | struct it *it; | |
10594 | { | |
10595 | struct it truncate_it; | |
10596 | struct glyph *from, *end, *to, *toend; | |
10597 | ||
10598 | xassert (!FRAME_WINDOW_P (it->f)); | |
10599 | ||
10600 | /* Get the truncation glyphs. */ | |
10601 | truncate_it = *it; | |
10602 | truncate_it.charset = -1; | |
10603 | truncate_it.current_x = 0; | |
10604 | truncate_it.face_id = DEFAULT_FACE_ID; | |
10605 | truncate_it.glyph_row = &scratch_glyph_row; | |
10606 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
10607 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
10608 | truncate_it.object = 0; | |
10609 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); | |
10610 | ||
10611 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
10612 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
10613 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
10614 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
10615 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
10616 | ||
10617 | while (from < end) | |
10618 | *to++ = *from++; | |
10619 | ||
10620 | /* There may be padding glyphs left over. Remove them. */ | |
10621 | from = to; | |
10622 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
10623 | ++from; | |
10624 | while (from < toend) | |
10625 | *to++ = *from++; | |
10626 | ||
10627 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
10628 | } | |
e0bfbde6 | 10629 | |
e0bfbde6 | 10630 | |
5f5c8ee5 | 10631 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 10632 | |
5f5c8ee5 GM |
10633 | Most of the time, ascent and height of a display line will be equal |
10634 | to the max_ascent and max_height values of the display iterator | |
10635 | structure. This is not the case if | |
67481ae5 | 10636 | |
5f5c8ee5 GM |
10637 | 1. We hit ZV without displaying anything. In this case, max_ascent |
10638 | and max_height will be zero. | |
1c9241f5 | 10639 | |
5f5c8ee5 GM |
10640 | 2. We have some glyphs that don't contribute to the line height. |
10641 | (The glyph row flag contributes_to_line_height_p is for future | |
10642 | pixmap extensions). | |
f6fd109b | 10643 | |
5f5c8ee5 GM |
10644 | The first case is easily covered by using default values because in |
10645 | these cases, the line height does not really matter, except that it | |
10646 | must not be zero. */ | |
67481ae5 | 10647 | |
5f5c8ee5 GM |
10648 | static void |
10649 | compute_line_metrics (it) | |
10650 | struct it *it; | |
10651 | { | |
10652 | struct glyph_row *row = it->glyph_row; | |
10653 | int area, i; | |
1c2250c2 | 10654 | |
5f5c8ee5 GM |
10655 | if (FRAME_WINDOW_P (it->f)) |
10656 | { | |
045dee35 | 10657 | int i, header_line_height; |
1c2250c2 | 10658 | |
5f5c8ee5 GM |
10659 | /* The line may consist of one space only, that was added to |
10660 | place the cursor on it. If so, the row's height hasn't been | |
10661 | computed yet. */ | |
10662 | if (row->height == 0) | |
10663 | { | |
10664 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 10665 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
10666 | row->ascent = it->max_ascent; |
10667 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10668 | row->phys_ascent = it->max_phys_ascent; |
10669 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10670 | } |
10671 | ||
10672 | /* Compute the width of this line. */ | |
10673 | row->pixel_width = row->x; | |
10674 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
10675 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
10676 | ||
10677 | xassert (row->pixel_width >= 0); | |
10678 | xassert (row->ascent >= 0 && row->height > 0); | |
10679 | ||
312246d1 GM |
10680 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
10681 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
10682 | ||
10683 | /* If first line's physical ascent is larger than its logical | |
10684 | ascent, use the physical ascent, and make the row taller. | |
10685 | This makes accented characters fully visible. */ | |
10686 | if (row == it->w->desired_matrix->rows | |
10687 | && row->phys_ascent > row->ascent) | |
10688 | { | |
10689 | row->height += row->phys_ascent - row->ascent; | |
10690 | row->ascent = row->phys_ascent; | |
10691 | } | |
10692 | ||
5f5c8ee5 GM |
10693 | /* Compute how much of the line is visible. */ |
10694 | row->visible_height = row->height; | |
10695 | ||
045dee35 GM |
10696 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
10697 | if (row->y < header_line_height) | |
10698 | row->visible_height -= header_line_height - row->y; | |
5f5c8ee5 GM |
10699 | else |
10700 | { | |
10701 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
10702 | if (row->y + row->height > max_y) | |
10703 | row->visible_height -= row->y + row->height - max_y; | |
10704 | } | |
10705 | } | |
10706 | else | |
10707 | { | |
10708 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
10709 | row->ascent = row->phys_ascent = 0; |
10710 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 10711 | } |
67481ae5 | 10712 | |
5f5c8ee5 GM |
10713 | /* Compute a hash code for this row. */ |
10714 | row->hash = 0; | |
10715 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
10716 | for (i = 0; i < row->used[area]; ++i) | |
10717 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
10718 | + row->glyphs[area][i].u.val | |
10719 | + (row->glyphs[area][i].type << 2)); | |
a2889657 | 10720 | |
5f5c8ee5 | 10721 | it->max_ascent = it->max_descent = 0; |
312246d1 | 10722 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 10723 | } |
12adba34 | 10724 | |
ca26e1c8 | 10725 | |
5f5c8ee5 GM |
10726 | /* Append one space to the glyph row of iterator IT if doing a |
10727 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
10728 | space have the default face, otherwise let it have the same face as | |
c6e89d6c GM |
10729 | IT->face_id. |
10730 | ||
10731 | This function is called to make sure that there is always one glyph | |
10732 | at the end of a glyph row that the cursor can be set on under | |
10733 | window-systems. (If there weren't such a glyph we would not know | |
10734 | how wide and tall a box cursor should be displayed). | |
10735 | ||
10736 | At the same time this space let's a nicely handle clearing to the | |
10737 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 10738 | |
5f5c8ee5 GM |
10739 | static void |
10740 | append_space (it, default_face_p) | |
10741 | struct it *it; | |
10742 | int default_face_p; | |
10743 | { | |
10744 | if (FRAME_WINDOW_P (it->f)) | |
10745 | { | |
10746 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 10747 | |
5f5c8ee5 GM |
10748 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
10749 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 10750 | { |
5f5c8ee5 GM |
10751 | /* Save some values that must not be changed. */ |
10752 | int saved_x = it->current_x; | |
10753 | struct text_pos saved_pos; | |
10754 | int saved_what = it->what; | |
10755 | int saved_face_id = it->face_id; | |
10756 | int saved_charset = it->charset; | |
10757 | Lisp_Object saved_object; | |
10758 | ||
10759 | saved_object = it->object; | |
10760 | saved_pos = it->position; | |
10761 | ||
10762 | it->what = IT_CHARACTER; | |
10763 | bzero (&it->position, sizeof it->position); | |
10764 | it->object = 0; | |
10765 | it->c = ' '; | |
10766 | it->len = 1; | |
10767 | it->charset = CHARSET_ASCII; | |
10768 | ||
10769 | if (default_face_p) | |
10770 | it->face_id = DEFAULT_FACE_ID; | |
10771 | if (it->multibyte_p) | |
10772 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, CHARSET_ASCII); | |
10773 | else | |
10774 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, -1); | |
1842fc1a | 10775 | |
5f5c8ee5 GM |
10776 | PRODUCE_GLYPHS (it); |
10777 | ||
10778 | it->current_x = saved_x; | |
10779 | it->object = saved_object; | |
10780 | it->position = saved_pos; | |
10781 | it->what = saved_what; | |
10782 | it->face_id = saved_face_id; | |
10783 | it->charset = saved_charset; | |
10784 | } | |
10785 | } | |
10786 | } | |
12adba34 | 10787 | |
1842fc1a | 10788 | |
5f5c8ee5 GM |
10789 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
10790 | to the end of the display line. Called from display_line. | |
10791 | If the glyph row is empty, add a space glyph to it so that we | |
10792 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
10793 | ||
10794 | static void | |
10795 | extend_face_to_end_of_line (it) | |
10796 | struct it *it; | |
10797 | { | |
10798 | struct face *face; | |
10799 | struct frame *f = it->f; | |
1842fc1a | 10800 | |
5f5c8ee5 GM |
10801 | /* If line is already filled, do nothing. */ |
10802 | if (it->current_x >= it->last_visible_x) | |
10803 | return; | |
10804 | ||
10805 | /* Face extension extends the background and box of IT->face_id | |
10806 | to the end of the line. If the background equals the background | |
10807 | of the frame, we haven't to do anything. */ | |
10808 | face = FACE_FROM_ID (f, it->face_id); | |
10809 | if (FRAME_WINDOW_P (f) | |
10810 | && face->box == FACE_NO_BOX | |
10811 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
10812 | && !face->stipple) | |
10813 | return; | |
1842fc1a | 10814 | |
5f5c8ee5 GM |
10815 | /* Set the glyph row flag indicating that the face of the last glyph |
10816 | in the text area has to be drawn to the end of the text area. */ | |
10817 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 10818 | |
5f5c8ee5 GM |
10819 | /* If current charset of IT is not ASCII, make sure we have the |
10820 | ASCII face. This will be automatically undone the next time | |
10821 | get_next_display_element returns a character from a different | |
10822 | charset. Note that the charset will always be ASCII in unibyte | |
10823 | text. */ | |
10824 | if (it->charset != CHARSET_ASCII) | |
10825 | { | |
10826 | it->charset = CHARSET_ASCII; | |
10827 | it->face_id = FACE_FOR_CHARSET (f, it->face_id, CHARSET_ASCII); | |
10828 | } | |
545e04f6 | 10829 | |
5f5c8ee5 GM |
10830 | if (FRAME_WINDOW_P (f)) |
10831 | { | |
10832 | /* If the row is empty, add a space with the current face of IT, | |
10833 | so that we know which face to draw. */ | |
10834 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 10835 | { |
5f5c8ee5 GM |
10836 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
10837 | it->glyph_row->glyphs[TEXT_AREA][0].u.ch.face_id = it->face_id; | |
10838 | it->glyph_row->used[TEXT_AREA] = 1; | |
a2889657 | 10839 | } |
5f5c8ee5 GM |
10840 | } |
10841 | else | |
10842 | { | |
10843 | /* Save some values that must not be changed. */ | |
10844 | int saved_x = it->current_x; | |
10845 | struct text_pos saved_pos; | |
10846 | Lisp_Object saved_object; | |
10847 | int saved_what = it->what; | |
10848 | ||
10849 | saved_object = it->object; | |
10850 | saved_pos = it->position; | |
10851 | ||
10852 | it->what = IT_CHARACTER; | |
10853 | bzero (&it->position, sizeof it->position); | |
10854 | it->object = 0; | |
10855 | it->c = ' '; | |
10856 | it->len = 1; | |
10857 | ||
10858 | PRODUCE_GLYPHS (it); | |
10859 | ||
10860 | while (it->current_x <= it->last_visible_x) | |
10861 | PRODUCE_GLYPHS (it); | |
10862 | ||
10863 | /* Don't count these blanks really. It would let us insert a left | |
10864 | truncation glyph below and make us set the cursor on them, maybe. */ | |
10865 | it->current_x = saved_x; | |
10866 | it->object = saved_object; | |
10867 | it->position = saved_pos; | |
10868 | it->what = saved_what; | |
10869 | } | |
10870 | } | |
12adba34 | 10871 | |
545e04f6 | 10872 | |
5f5c8ee5 GM |
10873 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
10874 | trailing whitespace. */ | |
1c9241f5 | 10875 | |
5f5c8ee5 GM |
10876 | static int |
10877 | trailing_whitespace_p (charpos) | |
10878 | int charpos; | |
10879 | { | |
10880 | int bytepos = CHAR_TO_BYTE (charpos); | |
10881 | int c = 0; | |
7bbe686f | 10882 | |
5f5c8ee5 GM |
10883 | while (bytepos < ZV_BYTE |
10884 | && (c = FETCH_CHAR (bytepos), | |
10885 | c == ' ' || c == '\t')) | |
10886 | ++bytepos; | |
0d09d1e6 | 10887 | |
8f897821 GM |
10888 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
10889 | { | |
10890 | if (bytepos != PT_BYTE) | |
10891 | return 1; | |
10892 | } | |
10893 | return 0; | |
5f5c8ee5 | 10894 | } |
31b24551 | 10895 | |
545e04f6 | 10896 | |
5f5c8ee5 | 10897 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 10898 | |
5f5c8ee5 GM |
10899 | void |
10900 | highlight_trailing_whitespace (f, row) | |
10901 | struct frame *f; | |
10902 | struct glyph_row *row; | |
10903 | { | |
10904 | int used = row->used[TEXT_AREA]; | |
10905 | ||
10906 | if (used) | |
10907 | { | |
10908 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
10909 | struct glyph *glyph = start + used - 1; | |
10910 | ||
10911 | /* Skip over the space glyph inserted to display the | |
10912 | cursor at the end of a line. */ | |
10913 | if (glyph->type == CHAR_GLYPH | |
10914 | && glyph->u.ch.code == ' ' | |
10915 | && glyph->object == 0) | |
10916 | --glyph; | |
10917 | ||
10918 | /* If last glyph is a space or stretch, and it's trailing | |
10919 | whitespace, set the face of all trailing whitespace glyphs in | |
10920 | IT->glyph_row to `trailing-whitespace'. */ | |
10921 | if (glyph >= start | |
10922 | && BUFFERP (glyph->object) | |
10923 | && (glyph->type == STRETCH_GLYPH | |
10924 | || (glyph->type == CHAR_GLYPH | |
10925 | && glyph->u.ch.code == ' ')) | |
10926 | && trailing_whitespace_p (glyph->charpos)) | |
545e04f6 | 10927 | { |
5f5c8ee5 GM |
10928 | int face_id = lookup_named_face (f, Qtrailing_whitespace, |
10929 | CHARSET_ASCII); | |
10930 | ||
10931 | while (glyph >= start | |
10932 | && BUFFERP (glyph->object) | |
10933 | && (glyph->type == STRETCH_GLYPH | |
10934 | || (glyph->type == CHAR_GLYPH | |
10935 | && glyph->u.ch.code == ' '))) | |
545e04f6 | 10936 | { |
5f5c8ee5 GM |
10937 | if (glyph->type == STRETCH_GLYPH) |
10938 | glyph->u.stretch.face_id = face_id; | |
10939 | else | |
10940 | glyph->u.ch.face_id = face_id; | |
10941 | --glyph; | |
545e04f6 KH |
10942 | } |
10943 | } | |
a2889657 | 10944 | } |
5f5c8ee5 | 10945 | } |
a2889657 | 10946 | |
5fcbb24d | 10947 | |
5f5c8ee5 GM |
10948 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
10949 | IT->w from text at the current position of IT. See dispextern.h | |
10950 | for an overview of struct it. Value is non-zero if | |
10951 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
10952 | only. */ | |
10953 | ||
10954 | static int | |
10955 | display_line (it) | |
10956 | struct it *it; | |
10957 | { | |
10958 | struct glyph_row *row = it->glyph_row; | |
10959 | ||
10960 | /* We always start displaying at hpos zero even if hscrolled. */ | |
10961 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 10962 | |
5f5c8ee5 GM |
10963 | /* We must not display in a row that's not a text row. */ |
10964 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
10965 | < it->w->desired_matrix->nrows); | |
12adba34 | 10966 | |
5f5c8ee5 GM |
10967 | /* Is IT->w showing the region? */ |
10968 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 10969 | |
5f5c8ee5 GM |
10970 | /* Clear the result glyph row and enable it. */ |
10971 | prepare_desired_row (row); | |
12adba34 | 10972 | |
5f5c8ee5 GM |
10973 | row->y = it->current_y; |
10974 | row->start = it->current; | |
10975 | row->continuation_lines_width = it->continuation_lines_width; | |
10976 | row->displays_text_p = 1; | |
10977 | ||
10978 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
10979 | display_line on only one line at a time, in which case this | |
10980 | can't really hurt too much, or we call it on lines which appear | |
10981 | one after another in the buffer, in which case all calls to | |
10982 | recenter_overlay_lists but the first will be pretty cheap. */ | |
10983 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
10984 | ||
5f5c8ee5 GM |
10985 | /* Move over display elements that are not visible because we are |
10986 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
10987 | if the first glyph is partially visible or if we hit a line end. */ | |
10988 | if (it->current_x < it->first_visible_x) | |
10989 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
10990 | MOVE_TO_POS | MOVE_TO_X); | |
10991 | ||
10992 | /* Get the initial row height. This is either the height of the | |
10993 | text hscrolled, if there is any, or zero. */ | |
10994 | row->ascent = it->max_ascent; | |
10995 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10996 | row->phys_ascent = it->max_phys_ascent; |
10997 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10998 | |
10999 | /* Loop generating characters. The loop is left with IT on the next | |
11000 | character to display. */ | |
11001 | while (1) | |
11002 | { | |
11003 | int n_glyphs_before, hpos_before, x_before; | |
11004 | int x, i, nglyphs; | |
11005 | ||
11006 | /* Retrieve the next thing to display. Value is zero if end of | |
11007 | buffer reached. */ | |
11008 | if (!get_next_display_element (it)) | |
11009 | { | |
11010 | /* Maybe add a space at the end of this line that is used to | |
11011 | display the cursor there under X. */ | |
11012 | append_space (it, 1); | |
11013 | ||
11014 | /* The position -1 below indicates a blank line not | |
11015 | corresponding to any text, as opposed to an empty line | |
11016 | corresponding to a line end. */ | |
11017 | if (row->used[TEXT_AREA] <= 1) | |
a2889657 | 11018 | { |
5f5c8ee5 GM |
11019 | row->glyphs[TEXT_AREA]->charpos = -1; |
11020 | row->displays_text_p = 0; | |
11021 | ||
11022 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
11023 | row->indicate_empty_line_p = 1; | |
a2889657 | 11024 | } |
5f5c8ee5 GM |
11025 | |
11026 | it->continuation_lines_width = 0; | |
11027 | row->ends_at_zv_p = 1; | |
11028 | break; | |
a2889657 | 11029 | } |
a2889657 | 11030 | |
5f5c8ee5 GM |
11031 | /* Now, get the metrics of what we want to display. This also |
11032 | generates glyphs in `row' (which is IT->glyph_row). */ | |
11033 | n_glyphs_before = row->used[TEXT_AREA]; | |
11034 | x = it->current_x; | |
11035 | PRODUCE_GLYPHS (it); | |
a2889657 | 11036 | |
5f5c8ee5 GM |
11037 | /* If this display element was in marginal areas, continue with |
11038 | the next one. */ | |
11039 | if (it->area != TEXT_AREA) | |
a2889657 | 11040 | { |
5f5c8ee5 GM |
11041 | row->ascent = max (row->ascent, it->max_ascent); |
11042 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11043 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11044 | row->phys_height = max (row->phys_height, | |
11045 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11046 | set_iterator_to_next (it); |
11047 | continue; | |
11048 | } | |
5936754e | 11049 | |
5f5c8ee5 GM |
11050 | /* Does the display element fit on the line? If we truncate |
11051 | lines, we should draw past the right edge of the window. If | |
11052 | we don't truncate, we want to stop so that we can display the | |
11053 | continuation glyph before the right margin. If lines are | |
11054 | continued, there are two possible strategies for characters | |
11055 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
11056 | glyphs as possible in this line and leave the rest for the | |
11057 | continuation line, or display the whole element in the next | |
11058 | line. Original redisplay did the former, so we do it also. */ | |
11059 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
11060 | hpos_before = it->hpos; | |
11061 | x_before = x; | |
11062 | ||
11063 | if (nglyphs == 1 | |
11064 | && it->current_x < it->last_visible_x) | |
11065 | { | |
11066 | ++it->hpos; | |
11067 | row->ascent = max (row->ascent, it->max_ascent); | |
11068 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11069 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11070 | row->phys_height = max (row->phys_height, | |
11071 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11072 | if (it->current_x - it->pixel_width < it->first_visible_x) |
11073 | row->x = x - it->first_visible_x; | |
11074 | } | |
11075 | else | |
11076 | { | |
11077 | int new_x; | |
11078 | struct glyph *glyph; | |
11079 | ||
11080 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 11081 | { |
5f5c8ee5 GM |
11082 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
11083 | new_x = x + glyph->pixel_width; | |
11084 | ||
11085 | if (/* Lines are continued. */ | |
11086 | !it->truncate_lines_p | |
11087 | && (/* Glyph doesn't fit on the line. */ | |
11088 | new_x > it->last_visible_x | |
11089 | /* Or it fits exactly on a window system frame. */ | |
11090 | || (new_x == it->last_visible_x | |
11091 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 11092 | { |
5f5c8ee5 GM |
11093 | /* End of a continued line. */ |
11094 | ||
11095 | if (it->hpos == 0 | |
11096 | || (new_x == it->last_visible_x | |
11097 | && FRAME_WINDOW_P (it->f))) | |
11098 | { | |
11099 | /* Current glyph fits exactly on the line. We | |
11100 | must continue the line because we can't draw | |
11101 | the cursor after the glyph. */ | |
11102 | row->continued_p = 1; | |
11103 | it->current_x = new_x; | |
11104 | it->continuation_lines_width += new_x; | |
11105 | ++it->hpos; | |
11106 | if (i == nglyphs - 1) | |
11107 | set_iterator_to_next (it); | |
11108 | } | |
11109 | else | |
5936754e | 11110 | { |
5f5c8ee5 GM |
11111 | /* Display element draws past the right edge of |
11112 | the window. Restore positions to values | |
11113 | before the element. The next line starts | |
11114 | with current_x before the glyph that could | |
11115 | not be displayed, so that TAB works right. */ | |
11116 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
11117 | ||
11118 | /* Display continuation glyphs. */ | |
11119 | if (!FRAME_WINDOW_P (it->f)) | |
11120 | produce_special_glyphs (it, IT_CONTINUATION); | |
11121 | row->continued_p = 1; | |
11122 | ||
11123 | it->current_x = x; | |
11124 | it->continuation_lines_width += x; | |
5936754e | 11125 | } |
5f5c8ee5 GM |
11126 | break; |
11127 | } | |
11128 | else if (new_x > it->first_visible_x) | |
11129 | { | |
11130 | /* Increment number of glyphs actually displayed. */ | |
11131 | ++it->hpos; | |
11132 | ||
11133 | if (x < it->first_visible_x) | |
11134 | /* Glyph is partially visible, i.e. row starts at | |
11135 | negative X position. */ | |
11136 | row->x = x - it->first_visible_x; | |
11137 | } | |
11138 | else | |
11139 | { | |
11140 | /* Glyph is completely off the left margin of the | |
11141 | window. This should not happen because of the | |
11142 | move_it_in_display_line at the start of | |
11143 | this function. */ | |
11144 | abort (); | |
a2889657 | 11145 | } |
a2889657 | 11146 | } |
5f5c8ee5 GM |
11147 | |
11148 | row->ascent = max (row->ascent, it->max_ascent); | |
11149 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11150 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11151 | row->phys_height = max (row->phys_height, | |
11152 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11153 | |
11154 | /* End of this display line if row is continued. */ | |
11155 | if (row->continued_p) | |
11156 | break; | |
a2889657 | 11157 | } |
a2889657 | 11158 | |
5f5c8ee5 GM |
11159 | /* Is this a line end? If yes, we're also done, after making |
11160 | sure that a non-default face is extended up to the right | |
11161 | margin of the window. */ | |
11162 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 11163 | { |
5f5c8ee5 GM |
11164 | int used_before = row->used[TEXT_AREA]; |
11165 | ||
11166 | /* Add a space at the end of the line that is used to | |
11167 | display the cursor there. */ | |
11168 | append_space (it, 0); | |
11169 | ||
11170 | /* Extend the face to the end of the line. */ | |
11171 | extend_face_to_end_of_line (it); | |
11172 | ||
11173 | /* Make sure we have the position. */ | |
11174 | if (used_before == 0) | |
11175 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
11176 | ||
11177 | /* Consume the line end. This skips over invisible lines. */ | |
11178 | set_iterator_to_next (it); | |
11179 | it->continuation_lines_width = 0; | |
11180 | break; | |
1c9241f5 | 11181 | } |
a2889657 | 11182 | |
5f5c8ee5 GM |
11183 | /* Proceed with next display element. Note that this skips |
11184 | over lines invisible because of selective display. */ | |
11185 | set_iterator_to_next (it); | |
b1d1124b | 11186 | |
5f5c8ee5 GM |
11187 | /* If we truncate lines, we are done when the last displayed |
11188 | glyphs reach past the right margin of the window. */ | |
11189 | if (it->truncate_lines_p | |
11190 | && (FRAME_WINDOW_P (it->f) | |
11191 | ? (it->current_x >= it->last_visible_x) | |
11192 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 11193 | { |
5f5c8ee5 GM |
11194 | /* Maybe add truncation glyphs. */ |
11195 | if (!FRAME_WINDOW_P (it->f)) | |
11196 | { | |
11197 | --it->glyph_row->used[TEXT_AREA]; | |
11198 | produce_special_glyphs (it, IT_TRUNCATION); | |
11199 | } | |
11200 | ||
11201 | row->truncated_on_right_p = 1; | |
11202 | it->continuation_lines_width = 0; | |
312246d1 | 11203 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
11204 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
11205 | it->hpos = hpos_before; | |
11206 | it->current_x = x_before; | |
11207 | break; | |
75d13c64 | 11208 | } |
a2889657 | 11209 | } |
a2889657 | 11210 | |
5f5c8ee5 GM |
11211 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
11212 | at the left window margin. */ | |
11213 | if (it->first_visible_x | |
11214 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
11215 | { | |
11216 | if (!FRAME_WINDOW_P (it->f)) | |
11217 | insert_left_trunc_glyphs (it); | |
11218 | row->truncated_on_left_p = 1; | |
11219 | } | |
a2889657 | 11220 | |
5f5c8ee5 GM |
11221 | /* If the start of this line is the overlay arrow-position, then |
11222 | mark this glyph row as the one containing the overlay arrow. | |
11223 | This is clearly a mess with variable size fonts. It would be | |
11224 | better to let it be displayed like cursors under X. */ | |
e24c997d | 11225 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 11226 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
11227 | && (MATRIX_ROW_START_CHARPOS (row) |
11228 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 11229 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
11230 | && ! overlay_arrow_seen) |
11231 | { | |
5f5c8ee5 GM |
11232 | /* Overlay arrow in window redisplay is a bitmap. */ |
11233 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 11234 | { |
5f5c8ee5 GM |
11235 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
11236 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
11237 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
11238 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
11239 | struct glyph *p2, *end; | |
11240 | ||
11241 | /* Copy the arrow glyphs. */ | |
11242 | while (glyph < arrow_end) | |
11243 | *p++ = *glyph++; | |
11244 | ||
11245 | /* Throw away padding glyphs. */ | |
11246 | p2 = p; | |
11247 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
11248 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
11249 | ++p2; | |
11250 | if (p2 > p) | |
212e4f87 | 11251 | { |
5f5c8ee5 GM |
11252 | while (p2 < end) |
11253 | *p++ = *p2++; | |
11254 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 11255 | } |
c4628384 | 11256 | } |
5f5c8ee5 | 11257 | |
a2889657 | 11258 | overlay_arrow_seen = 1; |
5f5c8ee5 | 11259 | row->overlay_arrow_p = 1; |
a2889657 JB |
11260 | } |
11261 | ||
5f5c8ee5 GM |
11262 | /* Compute pixel dimensions of this line. */ |
11263 | compute_line_metrics (it); | |
11264 | ||
11265 | /* Remember the position at which this line ends. */ | |
11266 | row->end = it->current; | |
11267 | ||
11268 | /* Maybe set the cursor. If you change this, it's probably a good | |
11269 | idea to also change the code in redisplay_window for cursor | |
11270 | movement in an unchanged window. */ | |
11271 | if (it->w->cursor.vpos < 0 | |
11272 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
11273 | && MATRIX_ROW_END_CHARPOS (row) >= PT | |
11274 | && !(MATRIX_ROW_END_CHARPOS (row) == PT | |
11275 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
11276 | || !row->ends_at_zv_p))) | |
11277 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
11278 | ||
11279 | /* Highlight trailing whitespace. */ | |
8f897821 | 11280 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
11281 | highlight_trailing_whitespace (it->f, it->glyph_row); |
11282 | ||
11283 | /* Prepare for the next line. This line starts horizontally at (X | |
11284 | HPOS) = (0 0). Vertical positions are incremented. As a | |
11285 | convenience for the caller, IT->glyph_row is set to the next | |
11286 | row to be used. */ | |
11287 | it->current_x = it->hpos = 0; | |
11288 | it->current_y += row->height; | |
11289 | ++it->vpos; | |
11290 | ++it->glyph_row; | |
11291 | return row->displays_text_p; | |
a2889657 | 11292 | } |
5f5c8ee5 GM |
11293 | |
11294 | ||
a2889657 | 11295 | \f |
5f5c8ee5 GM |
11296 | /*********************************************************************** |
11297 | Menu Bar | |
11298 | ***********************************************************************/ | |
11299 | ||
11300 | /* Redisplay the menu bar in the frame for window W. | |
11301 | ||
11302 | The menu bar of X frames that don't have X toolkit support is | |
11303 | displayed in a special window W->frame->menu_bar_window. | |
11304 | ||
11305 | The menu bar of terminal frames is treated specially as far as | |
11306 | glyph matrices are concerned. Menu bar lines are not part of | |
11307 | windows, so the update is done directly on the frame matrix rows | |
11308 | for the menu bar. */ | |
7ce2c095 RS |
11309 | |
11310 | static void | |
11311 | display_menu_bar (w) | |
11312 | struct window *w; | |
11313 | { | |
5f5c8ee5 GM |
11314 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11315 | struct it it; | |
11316 | Lisp_Object items; | |
8351baf2 | 11317 | int i; |
7ce2c095 | 11318 | |
5f5c8ee5 | 11319 | /* Don't do all this for graphical frames. */ |
dc937613 | 11320 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
11321 | if (!NILP (Vwindow_system)) |
11322 | return; | |
dc937613 | 11323 | #endif |
dc937613 | 11324 | #ifdef USE_X_TOOLKIT |
d3413a53 | 11325 | if (FRAME_X_P (f)) |
7ce2c095 | 11326 | return; |
5f5c8ee5 GM |
11327 | #endif |
11328 | ||
11329 | #ifdef USE_X_TOOLKIT | |
11330 | xassert (!FRAME_WINDOW_P (f)); | |
11331 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MODE_LINE_FACE_ID); | |
11332 | it.first_visible_x = 0; | |
11333 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11334 | #else /* not USE_X_TOOLKIT */ | |
11335 | if (FRAME_WINDOW_P (f)) | |
11336 | { | |
11337 | /* Menu bar lines are displayed in the desired matrix of the | |
11338 | dummy window menu_bar_window. */ | |
11339 | struct window *menu_w; | |
11340 | xassert (WINDOWP (f->menu_bar_window)); | |
11341 | menu_w = XWINDOW (f->menu_bar_window); | |
11342 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
11343 | MODE_LINE_FACE_ID); | |
11344 | it.first_visible_x = 0; | |
11345 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11346 | } | |
11347 | else | |
11348 | { | |
11349 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
11350 | pixel x/y. */ | |
11351 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
11352 | MODE_LINE_FACE_ID); | |
11353 | it.first_visible_x = 0; | |
11354 | it.last_visible_x = FRAME_WIDTH (f); | |
11355 | } | |
11356 | #endif /* not USE_X_TOOLKIT */ | |
11357 | ||
11358 | /* Clear all rows of the menu bar. */ | |
11359 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
11360 | { | |
11361 | struct glyph_row *row = it.glyph_row + i; | |
11362 | clear_glyph_row (row); | |
11363 | row->enabled_p = 1; | |
11364 | row->full_width_p = 1; | |
11365 | } | |
7ce2c095 | 11366 | |
5f5c8ee5 GM |
11367 | /* Make the first line of the menu bar appear in reverse video. */ |
11368 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 11369 | |
5f5c8ee5 GM |
11370 | /* Display all items of the menu bar. */ |
11371 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 11372 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 11373 | { |
5f5c8ee5 GM |
11374 | Lisp_Object string; |
11375 | ||
11376 | /* Stop at nil string. */ | |
8351baf2 RS |
11377 | string = XVECTOR (items)->contents[i + 1]; |
11378 | if (NILP (string)) | |
11379 | break; | |
2d66ad19 | 11380 | |
5f5c8ee5 GM |
11381 | /* Remember where item was displayed. */ |
11382 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 11383 | |
5f5c8ee5 GM |
11384 | /* Display the item, pad with one space. */ |
11385 | if (it.current_x < it.last_visible_x) | |
11386 | display_string (NULL, string, Qnil, 0, 0, &it, | |
11387 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
11388 | } |
11389 | ||
2d66ad19 | 11390 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
11391 | if (it.current_x < it.last_visible_x) |
11392 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 11393 | |
5f5c8ee5 GM |
11394 | /* Compute the total height of the lines. */ |
11395 | compute_line_metrics (&it); | |
7ce2c095 | 11396 | } |
5f5c8ee5 GM |
11397 | |
11398 | ||
7ce2c095 | 11399 | \f |
5f5c8ee5 GM |
11400 | /*********************************************************************** |
11401 | Mode Line | |
11402 | ***********************************************************************/ | |
11403 | ||
11404 | /* Display the mode and/or top line of window W. */ | |
a2889657 JB |
11405 | |
11406 | static void | |
5f5c8ee5 | 11407 | display_mode_lines (w) |
a2889657 JB |
11408 | struct window *w; |
11409 | { | |
5f5c8ee5 | 11410 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 11411 | line_number_displayed = 0; |
155ef550 | 11412 | w->column_number_displayed = Qnil; |
aa6d10fa | 11413 | |
5f5c8ee5 | 11414 | if (WINDOW_WANTS_MODELINE_P (w)) |
045dee35 GM |
11415 | display_mode_line (w, MODE_LINE_FACE_ID, |
11416 | current_buffer->mode_line_format); | |
5f5c8ee5 | 11417 | |
045dee35 GM |
11418 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
11419 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
11420 | current_buffer->header_line_format); | |
5f5c8ee5 | 11421 | } |
03b294dc | 11422 | |
03b294dc | 11423 | |
5f5c8ee5 | 11424 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 11425 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
5f5c8ee5 | 11426 | FORMAT is the mode line format to display. */ |
03b294dc | 11427 | |
5f5c8ee5 GM |
11428 | static void |
11429 | display_mode_line (w, face_id, format) | |
11430 | struct window *w; | |
11431 | enum face_id face_id; | |
11432 | Lisp_Object format; | |
11433 | { | |
11434 | struct it it; | |
11435 | struct face *face; | |
03b294dc | 11436 | |
5f5c8ee5 GM |
11437 | init_iterator (&it, w, -1, -1, NULL, face_id); |
11438 | prepare_desired_row (it.glyph_row); | |
11439 | ||
11440 | /* Temporarily make frame's keyboard the current kboard so that | |
11441 | kboard-local variables in the mode_line_format will get the right | |
11442 | values. */ | |
11443 | push_frame_kboard (it.f); | |
11444 | display_mode_element (&it, 0, 0, 0, format); | |
11445 | pop_frame_kboard (); | |
a2889657 | 11446 | |
5f5c8ee5 GM |
11447 | /* Fill up with spaces. */ |
11448 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
11449 | ||
11450 | compute_line_metrics (&it); | |
11451 | it.glyph_row->full_width_p = 1; | |
11452 | it.glyph_row->mode_line_p = 1; | |
11453 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
11454 | it.glyph_row->continued_p = 0; | |
11455 | it.glyph_row->truncated_on_left_p = 0; | |
11456 | it.glyph_row->truncated_on_right_p = 0; | |
11457 | ||
11458 | /* Make a 3D mode-line have a shadow at its right end. */ | |
11459 | face = FACE_FROM_ID (it.f, face_id); | |
11460 | extend_face_to_end_of_line (&it); | |
11461 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 11462 | { |
5f5c8ee5 GM |
11463 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
11464 | + it.glyph_row->used[TEXT_AREA] - 1); | |
11465 | last->right_box_line_p = 1; | |
d7eb09a0 | 11466 | } |
a2889657 JB |
11467 | } |
11468 | ||
a2889657 | 11469 | |
5f5c8ee5 GM |
11470 | /* Contribute ELT to the mode line for window IT->w. How it |
11471 | translates into text depends on its data type. | |
a2889657 | 11472 | |
5f5c8ee5 | 11473 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
11474 | |
11475 | DEPTH is the depth in recursion. It is used to prevent | |
11476 | infinite recursion here. | |
11477 | ||
5f5c8ee5 GM |
11478 | FIELD_WIDTH is the number of characters the display of ELT should |
11479 | occupy in the mode line, and PRECISION is the maximum number of | |
11480 | characters to display from ELT's representation. See | |
11481 | display_string for details. * | |
a2889657 | 11482 | |
5f5c8ee5 | 11483 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
11484 | |
11485 | static int | |
5f5c8ee5 GM |
11486 | display_mode_element (it, depth, field_width, precision, elt) |
11487 | struct it *it; | |
a2889657 | 11488 | int depth; |
5f5c8ee5 GM |
11489 | int field_width, precision; |
11490 | Lisp_Object elt; | |
a2889657 | 11491 | { |
5f5c8ee5 GM |
11492 | int n = 0, field, prec; |
11493 | ||
a2889657 JB |
11494 | tail_recurse: |
11495 | if (depth > 10) | |
11496 | goto invalid; | |
11497 | ||
11498 | depth++; | |
11499 | ||
0220c518 | 11500 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
11501 | { |
11502 | case Lisp_String: | |
11503 | { | |
11504 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
11505 | unsigned char c; |
11506 | unsigned char *this = XSTRING (elt)->data; | |
11507 | unsigned char *lisp_string = this; | |
11508 | ||
11509 | while ((precision <= 0 || n < precision) | |
11510 | && *this | |
11511 | && (frame_title_ptr | |
11512 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
11513 | { |
11514 | unsigned char *last = this; | |
5f5c8ee5 GM |
11515 | |
11516 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
11517 | while ((c = *this++) != '\0' && c != '%') |
11518 | ; | |
5f5c8ee5 | 11519 | |
a2889657 JB |
11520 | if (this - 1 != last) |
11521 | { | |
5f5c8ee5 GM |
11522 | /* Output to end of string or up to '%'. Field width |
11523 | is length of string. Don't output more than | |
11524 | PRECISION allows us. */ | |
11525 | prec = --this - last; | |
11526 | if (precision > 0 && prec > precision - n) | |
11527 | prec = precision - n; | |
11528 | ||
d39b6696 | 11529 | if (frame_title_ptr) |
5f5c8ee5 | 11530 | n += store_frame_title (last, prec, prec); |
d39b6696 | 11531 | else |
5f5c8ee5 GM |
11532 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
11533 | it, 0, prec, 0, -1); | |
a2889657 JB |
11534 | } |
11535 | else /* c == '%' */ | |
11536 | { | |
5f5c8ee5 GM |
11537 | unsigned char *percent_position = this; |
11538 | ||
11539 | /* Get the specified minimum width. Zero means | |
11540 | don't pad. */ | |
11541 | field = 0; | |
a2889657 | 11542 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 11543 | field = field * 10 + c - '0'; |
a2889657 | 11544 | |
5f5c8ee5 GM |
11545 | /* Don't pad beyond the total padding allowed. */ |
11546 | if (field_width - n > 0 && field > field_width - n) | |
11547 | field = field_width - n; | |
a2889657 | 11548 | |
5f5c8ee5 GM |
11549 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
11550 | prec = precision - n; | |
11551 | ||
a2889657 | 11552 | if (c == 'M') |
5f5c8ee5 GM |
11553 | n += display_mode_element (it, depth, field, prec, |
11554 | Vglobal_mode_string); | |
a2889657 | 11555 | else if (c != 0) |
d39b6696 | 11556 | { |
5f5c8ee5 GM |
11557 | unsigned char *spec |
11558 | = decode_mode_spec (it->w, c, field, prec); | |
11559 | ||
d39b6696 | 11560 | if (frame_title_ptr) |
5f5c8ee5 | 11561 | n += store_frame_title (spec, field, prec); |
d39b6696 | 11562 | else |
5f5c8ee5 GM |
11563 | { |
11564 | int nglyphs_before | |
11565 | = it->glyph_row->used[TEXT_AREA]; | |
11566 | int charpos | |
11567 | = percent_position - XSTRING (elt)->data; | |
11568 | int nwritten | |
11569 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
11570 | field, prec, 0, -1); | |
11571 | ||
11572 | /* Assign to the glyphs written above the | |
11573 | string where the `%x' came from, position | |
11574 | of the `%'. */ | |
11575 | if (nwritten > 0) | |
11576 | { | |
11577 | struct glyph *glyph | |
11578 | = (it->glyph_row->glyphs[TEXT_AREA] | |
11579 | + nglyphs_before); | |
11580 | int i; | |
11581 | ||
11582 | for (i = 0; i < nwritten; ++i) | |
11583 | { | |
11584 | glyph[i].object = elt; | |
11585 | glyph[i].charpos = charpos; | |
11586 | } | |
11587 | ||
11588 | n += nwritten; | |
11589 | } | |
11590 | } | |
d39b6696 | 11591 | } |
a2889657 JB |
11592 | } |
11593 | } | |
11594 | } | |
11595 | break; | |
11596 | ||
11597 | case Lisp_Symbol: | |
11598 | /* A symbol: process the value of the symbol recursively | |
11599 | as if it appeared here directly. Avoid error if symbol void. | |
11600 | Special case: if value of symbol is a string, output the string | |
11601 | literally. */ | |
11602 | { | |
11603 | register Lisp_Object tem; | |
11604 | tem = Fboundp (elt); | |
265a9e55 | 11605 | if (!NILP (tem)) |
a2889657 JB |
11606 | { |
11607 | tem = Fsymbol_value (elt); | |
11608 | /* If value is a string, output that string literally: | |
11609 | don't check for % within it. */ | |
e24c997d | 11610 | if (STRINGP (tem)) |
d39b6696 | 11611 | { |
5f5c8ee5 GM |
11612 | prec = XSTRING (tem)->size; |
11613 | if (precision > 0 && prec > precision - n) | |
11614 | prec = precision - n; | |
d39b6696 | 11615 | if (frame_title_ptr) |
5f5c8ee5 | 11616 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 11617 | else |
5f5c8ee5 GM |
11618 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
11619 | 0, prec, 0, -1); | |
d39b6696 | 11620 | } |
a2889657 | 11621 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
11622 | { |
11623 | /* Give up right away for nil or t. */ | |
11624 | elt = tem; | |
11625 | goto tail_recurse; | |
11626 | } | |
a2889657 JB |
11627 | } |
11628 | } | |
11629 | break; | |
11630 | ||
11631 | case Lisp_Cons: | |
11632 | { | |
11633 | register Lisp_Object car, tem; | |
11634 | ||
11635 | /* A cons cell: three distinct cases. | |
11636 | If first element is a string or a cons, process all the elements | |
11637 | and effectively concatenate them. | |
11638 | If first element is a negative number, truncate displaying cdr to | |
11639 | at most that many characters. If positive, pad (with spaces) | |
11640 | to at least that many characters. | |
11641 | If first element is a symbol, process the cadr or caddr recursively | |
11642 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 11643 | car = XCAR (elt); |
5f5c8ee5 GM |
11644 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
11645 | { | |
11646 | /* An element of the form (:eval FORM) means evaluate FORM | |
11647 | and use the result as mode line elements. */ | |
11648 | struct gcpro gcpro1; | |
11649 | Lisp_Object spec; | |
11650 | ||
11651 | spec = eval_form (XCAR (XCDR (elt))); | |
11652 | GCPRO1 (spec); | |
11653 | n += display_mode_element (it, depth, field_width - n, | |
11654 | precision - n, spec); | |
11655 | UNGCPRO; | |
11656 | } | |
11657 | else if (SYMBOLP (car)) | |
a2889657 JB |
11658 | { |
11659 | tem = Fboundp (car); | |
9472f927 | 11660 | elt = XCDR (elt); |
e24c997d | 11661 | if (!CONSP (elt)) |
a2889657 JB |
11662 | goto invalid; |
11663 | /* elt is now the cdr, and we know it is a cons cell. | |
11664 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 11665 | if (!NILP (tem)) |
a2889657 JB |
11666 | { |
11667 | tem = Fsymbol_value (car); | |
265a9e55 | 11668 | if (!NILP (tem)) |
9472f927 GM |
11669 | { |
11670 | elt = XCAR (elt); | |
11671 | goto tail_recurse; | |
11672 | } | |
a2889657 JB |
11673 | } |
11674 | /* Symbol's value is nil (or symbol is unbound) | |
11675 | Get the cddr of the original list | |
11676 | and if possible find the caddr and use that. */ | |
9472f927 | 11677 | elt = XCDR (elt); |
265a9e55 | 11678 | if (NILP (elt)) |
a2889657 | 11679 | break; |
e24c997d | 11680 | else if (!CONSP (elt)) |
a2889657 | 11681 | goto invalid; |
9472f927 | 11682 | elt = XCAR (elt); |
a2889657 JB |
11683 | goto tail_recurse; |
11684 | } | |
e24c997d | 11685 | else if (INTEGERP (car)) |
a2889657 JB |
11686 | { |
11687 | register int lim = XINT (car); | |
9472f927 | 11688 | elt = XCDR (elt); |
a2889657 | 11689 | if (lim < 0) |
5f5c8ee5 GM |
11690 | { |
11691 | /* Negative int means reduce maximum width. */ | |
11692 | if (precision <= 0) | |
11693 | precision = -lim; | |
11694 | else | |
11695 | precision = min (precision, -lim); | |
11696 | } | |
a2889657 JB |
11697 | else if (lim > 0) |
11698 | { | |
11699 | /* Padding specified. Don't let it be more than | |
11700 | current maximum. */ | |
5f5c8ee5 GM |
11701 | if (precision > 0) |
11702 | lim = min (precision, lim); | |
11703 | ||
a2889657 JB |
11704 | /* If that's more padding than already wanted, queue it. |
11705 | But don't reduce padding already specified even if | |
11706 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 11707 | field_width = max (lim, field_width); |
a2889657 JB |
11708 | } |
11709 | goto tail_recurse; | |
11710 | } | |
e24c997d | 11711 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
11712 | { |
11713 | register int limit = 50; | |
5f5c8ee5 GM |
11714 | /* Limit is to protect against circular lists. */ |
11715 | while (CONSP (elt) | |
11716 | && --limit > 0 | |
11717 | && (precision <= 0 || n < precision)) | |
a2889657 | 11718 | { |
5f5c8ee5 | 11719 | n += display_mode_element (it, depth, field_width - n, |
9472f927 GM |
11720 | precision - n, XCAR (elt)); |
11721 | elt = XCDR (elt); | |
a2889657 JB |
11722 | } |
11723 | } | |
11724 | } | |
11725 | break; | |
11726 | ||
11727 | default: | |
11728 | invalid: | |
d39b6696 | 11729 | if (frame_title_ptr) |
5f5c8ee5 | 11730 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 11731 | else |
5f5c8ee5 GM |
11732 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
11733 | precision - n, 0, 0); | |
11734 | return n; | |
a2889657 JB |
11735 | } |
11736 | ||
5f5c8ee5 GM |
11737 | /* Pad to FIELD_WIDTH. */ |
11738 | if (field_width > 0 && n < field_width) | |
11739 | { | |
11740 | if (frame_title_ptr) | |
11741 | n += store_frame_title ("", field_width - n, 0); | |
11742 | else | |
11743 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
11744 | 0, 0, 0); | |
11745 | } | |
11746 | ||
11747 | return n; | |
a2889657 | 11748 | } |
5f5c8ee5 GM |
11749 | |
11750 | ||
766525bc RS |
11751 | /* Write a null-terminated, right justified decimal representation of |
11752 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
11753 | ||
11754 | static void | |
11755 | pint2str (buf, width, d) | |
11756 | register char *buf; | |
11757 | register int width; | |
11758 | register int d; | |
11759 | { | |
11760 | register char *p = buf; | |
11761 | ||
11762 | if (d <= 0) | |
5f5c8ee5 | 11763 | *p++ = '0'; |
766525bc | 11764 | else |
5f5c8ee5 | 11765 | { |
766525bc | 11766 | while (d > 0) |
5f5c8ee5 | 11767 | { |
766525bc RS |
11768 | *p++ = d % 10 + '0'; |
11769 | d /= 10; | |
5f5c8ee5 GM |
11770 | } |
11771 | } | |
11772 | ||
11773 | for (width -= (int) (p - buf); width > 0; --width) | |
11774 | *p++ = ' '; | |
766525bc RS |
11775 | *p-- = '\0'; |
11776 | while (p > buf) | |
5f5c8ee5 | 11777 | { |
766525bc RS |
11778 | d = *buf; |
11779 | *buf++ = *p; | |
11780 | *p-- = d; | |
5f5c8ee5 | 11781 | } |
766525bc RS |
11782 | } |
11783 | ||
5f5c8ee5 | 11784 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
11785 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
11786 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
11787 | ||
6693a99a | 11788 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 11789 | |
1c9241f5 KH |
11790 | static char * |
11791 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
11792 | Lisp_Object coding_system; | |
11793 | register char *buf; | |
11794 | int eol_flag; | |
11795 | { | |
1e1078d6 | 11796 | Lisp_Object val; |
916848d8 | 11797 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
11798 | unsigned char *eol_str; |
11799 | int eol_str_len; | |
11800 | /* The EOL conversion we are using. */ | |
11801 | Lisp_Object eoltype; | |
1e1078d6 RS |
11802 | |
11803 | val = coding_system; | |
1c9241f5 KH |
11804 | |
11805 | if (NILP (val)) /* Not yet decided. */ | |
11806 | { | |
916848d8 RS |
11807 | if (multibyte) |
11808 | *buf++ = '-'; | |
21e989e3 | 11809 | if (eol_flag) |
302f2b38 | 11810 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 11811 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
11812 | } |
11813 | else | |
11814 | { | |
1e1078d6 RS |
11815 | Lisp_Object eolvalue; |
11816 | ||
11817 | eolvalue = Fget (coding_system, Qeol_type); | |
11818 | ||
1c9241f5 | 11819 | while (!NILP (val) && SYMBOLP (val)) |
1e1078d6 RS |
11820 | { |
11821 | val = Fget (val, Qcoding_system); | |
11822 | if (NILP (eolvalue)) | |
b070c1d7 | 11823 | eolvalue = Fget (val, Qeol_type); |
1e1078d6 RS |
11824 | } |
11825 | ||
916848d8 RS |
11826 | if (multibyte) |
11827 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
11828 | ||
1c9241f5 KH |
11829 | if (eol_flag) |
11830 | { | |
1e1078d6 RS |
11831 | /* The EOL conversion that is normal on this system. */ |
11832 | ||
11833 | if (NILP (eolvalue)) /* Not yet decided. */ | |
11834 | eoltype = eol_mnemonic_undecided; | |
11835 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
11836 | eoltype = eol_mnemonic_undecided; | |
11837 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
11838 | eoltype = (XFASTINT (eolvalue) == 0 | |
11839 | ? eol_mnemonic_unix | |
11840 | : (XFASTINT (eolvalue) == 1 | |
11841 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
11842 | } |
11843 | } | |
5f5c8ee5 | 11844 | |
302f2b38 EZ |
11845 | if (eol_flag) |
11846 | { | |
11847 | /* Mention the EOL conversion if it is not the usual one. */ | |
11848 | if (STRINGP (eoltype)) | |
11849 | { | |
11850 | eol_str = XSTRING (eoltype)->data; | |
11851 | eol_str_len = XSTRING (eoltype)->size; | |
11852 | } | |
f30b3499 KH |
11853 | else if (INTEGERP (eoltype) |
11854 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
11855 | { | |
f30b3499 KH |
11856 | unsigned char work[4]; |
11857 | ||
11858 | eol_str_len = CHAR_STRING (XINT (eoltype), work, eol_str); | |
11859 | } | |
302f2b38 EZ |
11860 | else |
11861 | { | |
11862 | eol_str = invalid_eol_type; | |
11863 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 11864 | } |
f30b3499 | 11865 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 11866 | buf += eol_str_len; |
1c9241f5 | 11867 | } |
302f2b38 | 11868 | |
1c9241f5 KH |
11869 | return buf; |
11870 | } | |
11871 | ||
a2889657 | 11872 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
11873 | generated by character C. PRECISION >= 0 means don't return a |
11874 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
11875 | string returned with spaces to that value. */ | |
a2889657 | 11876 | |
11e82b76 JB |
11877 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
11878 | ||
a2889657 | 11879 | static char * |
5f5c8ee5 | 11880 | decode_mode_spec (w, c, field_width, precision) |
a2889657 JB |
11881 | struct window *w; |
11882 | register char c; | |
5f5c8ee5 | 11883 | int field_width, precision; |
a2889657 | 11884 | { |
0b67772d | 11885 | Lisp_Object obj; |
5f5c8ee5 GM |
11886 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11887 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 11888 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 11889 | |
0b67772d | 11890 | obj = Qnil; |
a2889657 JB |
11891 | |
11892 | switch (c) | |
11893 | { | |
1af9f229 RS |
11894 | case '*': |
11895 | if (!NILP (b->read_only)) | |
11896 | return "%"; | |
11897 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11898 | return "*"; | |
11899 | return "-"; | |
11900 | ||
11901 | case '+': | |
11902 | /* This differs from %* only for a modified read-only buffer. */ | |
11903 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11904 | return "*"; | |
11905 | if (!NILP (b->read_only)) | |
11906 | return "%"; | |
11907 | return "-"; | |
11908 | ||
11909 | case '&': | |
11910 | /* This differs from %* in ignoring read-only-ness. */ | |
11911 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
11912 | return "*"; | |
11913 | return "-"; | |
11914 | ||
11915 | case '%': | |
11916 | return "%"; | |
11917 | ||
11918 | case '[': | |
11919 | { | |
11920 | int i; | |
11921 | char *p; | |
11922 | ||
11923 | if (command_loop_level > 5) | |
11924 | return "[[[... "; | |
11925 | p = decode_mode_spec_buf; | |
11926 | for (i = 0; i < command_loop_level; i++) | |
11927 | *p++ = '['; | |
11928 | *p = 0; | |
11929 | return decode_mode_spec_buf; | |
11930 | } | |
11931 | ||
11932 | case ']': | |
11933 | { | |
11934 | int i; | |
11935 | char *p; | |
11936 | ||
11937 | if (command_loop_level > 5) | |
11938 | return " ...]]]"; | |
11939 | p = decode_mode_spec_buf; | |
11940 | for (i = 0; i < command_loop_level; i++) | |
11941 | *p++ = ']'; | |
11942 | *p = 0; | |
11943 | return decode_mode_spec_buf; | |
11944 | } | |
11945 | ||
11946 | case '-': | |
11947 | { | |
1af9f229 | 11948 | register int i; |
5f5c8ee5 GM |
11949 | |
11950 | /* Let lots_of_dashes be a string of infinite length. */ | |
11951 | if (field_width <= 0 | |
11952 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 11953 | { |
5f5c8ee5 GM |
11954 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
11955 | decode_mode_spec_buf[i] = '-'; | |
11956 | decode_mode_spec_buf[i] = '\0'; | |
11957 | return decode_mode_spec_buf; | |
1af9f229 | 11958 | } |
5f5c8ee5 GM |
11959 | else |
11960 | return lots_of_dashes; | |
1af9f229 RS |
11961 | } |
11962 | ||
a2889657 | 11963 | case 'b': |
d39b6696 | 11964 | obj = b->name; |
a2889657 JB |
11965 | break; |
11966 | ||
1af9f229 RS |
11967 | case 'c': |
11968 | { | |
11969 | int col = current_column (); | |
11970 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 11971 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
11972 | return decode_mode_spec_buf; |
11973 | } | |
11974 | ||
11975 | case 'F': | |
11976 | /* %F displays the frame name. */ | |
5f5c8ee5 | 11977 | if (!NILP (f->title)) |
95184b48 | 11978 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 11979 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 11980 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 11981 | return "Emacs"; |
1af9f229 | 11982 | |
a2889657 | 11983 | case 'f': |
d39b6696 | 11984 | obj = b->filename; |
a2889657 JB |
11985 | break; |
11986 | ||
aa6d10fa RS |
11987 | case 'l': |
11988 | { | |
12adba34 RS |
11989 | int startpos = XMARKER (w->start)->charpos; |
11990 | int startpos_byte = marker_byte_position (w->start); | |
11991 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 11992 | int nlines, junk; |
aa6d10fa RS |
11993 | int height = XFASTINT (w->height); |
11994 | ||
11995 | /* If we decided that this buffer isn't suitable for line numbers, | |
11996 | don't forget that too fast. */ | |
11997 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 11998 | goto no_value; |
5300fd39 RS |
11999 | /* But do forget it, if the window shows a different buffer now. */ |
12000 | else if (BUFFERP (w->base_line_pos)) | |
12001 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
12002 | |
12003 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 12004 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
12005 | { |
12006 | w->base_line_pos = Qnil; | |
12007 | w->base_line_number = Qnil; | |
766525bc | 12008 | goto no_value; |
aa6d10fa RS |
12009 | } |
12010 | ||
12011 | if (!NILP (w->base_line_number) | |
12012 | && !NILP (w->base_line_pos) | |
12adba34 | 12013 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
12014 | { |
12015 | line = XFASTINT (w->base_line_number); | |
12016 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 12017 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
12018 | } |
12019 | else | |
12020 | { | |
12021 | line = 1; | |
d39b6696 | 12022 | linepos = BUF_BEGV (b); |
12adba34 | 12023 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
12024 | } |
12025 | ||
12026 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
12027 | nlines = display_count_lines (linepos, linepos_byte, |
12028 | startpos_byte, | |
12029 | startpos, &junk); | |
aa6d10fa RS |
12030 | |
12031 | topline = nlines + line; | |
12032 | ||
12033 | /* Determine a new base line, if the old one is too close | |
12034 | or too far away, or if we did not have one. | |
12035 | "Too close" means it's plausible a scroll-down would | |
12036 | go back past it. */ | |
d39b6696 | 12037 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 12038 | { |
c2213350 KH |
12039 | XSETFASTINT (w->base_line_number, topline); |
12040 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
12041 | } |
12042 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 12043 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 12044 | { |
d39b6696 | 12045 | int limit = BUF_BEGV (b); |
12adba34 | 12046 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 12047 | int position; |
5d121aec | 12048 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
12049 | |
12050 | if (startpos - distance > limit) | |
12adba34 RS |
12051 | { |
12052 | limit = startpos - distance; | |
12053 | limit_byte = CHAR_TO_BYTE (limit); | |
12054 | } | |
aa6d10fa | 12055 | |
12adba34 RS |
12056 | nlines = display_count_lines (startpos, startpos_byte, |
12057 | limit_byte, | |
12058 | - (height * 2 + 30), | |
aa6d10fa RS |
12059 | &position); |
12060 | /* If we couldn't find the lines we wanted within | |
5d121aec | 12061 | line_number_display_limit_width chars per line, |
aa6d10fa | 12062 | give up on line numbers for this window. */ |
12adba34 | 12063 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
12064 | { |
12065 | w->base_line_pos = w->buffer; | |
12066 | w->base_line_number = Qnil; | |
766525bc | 12067 | goto no_value; |
aa6d10fa RS |
12068 | } |
12069 | ||
c2213350 | 12070 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 12071 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
12072 | } |
12073 | ||
12074 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
12075 | nlines = display_count_lines (startpos, startpos_byte, |
12076 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
12077 | |
12078 | /* Record that we did display the line number. */ | |
12079 | line_number_displayed = 1; | |
12080 | ||
12081 | /* Make the string to show. */ | |
5f5c8ee5 | 12082 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 12083 | return decode_mode_spec_buf; |
766525bc RS |
12084 | no_value: |
12085 | { | |
12086 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
12087 | int pad = field_width - 2; |
12088 | while (pad-- > 0) | |
12089 | *p++ = ' '; | |
12090 | *p++ = '?'; | |
12091 | *p = '?'; | |
766525bc RS |
12092 | return decode_mode_spec_buf; |
12093 | } | |
aa6d10fa RS |
12094 | } |
12095 | break; | |
12096 | ||
a2889657 | 12097 | case 'm': |
d39b6696 | 12098 | obj = b->mode_name; |
a2889657 JB |
12099 | break; |
12100 | ||
12101 | case 'n': | |
d39b6696 | 12102 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
12103 | return " Narrow"; |
12104 | break; | |
12105 | ||
a2889657 JB |
12106 | case 'p': |
12107 | { | |
12108 | int pos = marker_position (w->start); | |
d39b6696 | 12109 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 12110 | |
d39b6696 | 12111 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 12112 | { |
d39b6696 | 12113 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12114 | return "All"; |
12115 | else | |
12116 | return "Bottom"; | |
12117 | } | |
d39b6696 | 12118 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12119 | return "Top"; |
12120 | else | |
12121 | { | |
3c7d31b9 RS |
12122 | if (total > 1000000) |
12123 | /* Do it differently for a large value, to avoid overflow. */ | |
12124 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12125 | else | |
12126 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
12127 | /* We can't normally display a 3-digit number, |
12128 | so get us a 2-digit number that is close. */ | |
12129 | if (total == 100) | |
12130 | total = 99; | |
12131 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12132 | return decode_mode_spec_buf; | |
12133 | } | |
12134 | } | |
12135 | ||
8ffcb79f RS |
12136 | /* Display percentage of size above the bottom of the screen. */ |
12137 | case 'P': | |
12138 | { | |
12139 | int toppos = marker_position (w->start); | |
d39b6696 KH |
12140 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
12141 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 12142 | |
d39b6696 | 12143 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 12144 | { |
d39b6696 | 12145 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12146 | return "All"; |
12147 | else | |
12148 | return "Bottom"; | |
12149 | } | |
12150 | else | |
12151 | { | |
3c7d31b9 RS |
12152 | if (total > 1000000) |
12153 | /* Do it differently for a large value, to avoid overflow. */ | |
12154 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12155 | else | |
12156 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
12157 | /* We can't normally display a 3-digit number, |
12158 | so get us a 2-digit number that is close. */ | |
12159 | if (total == 100) | |
12160 | total = 99; | |
d39b6696 | 12161 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12162 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
12163 | else | |
12164 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12165 | return decode_mode_spec_buf; | |
12166 | } | |
12167 | } | |
12168 | ||
1af9f229 RS |
12169 | case 's': |
12170 | /* status of process */ | |
12171 | obj = Fget_buffer_process (w->buffer); | |
12172 | if (NILP (obj)) | |
12173 | return "no process"; | |
12174 | #ifdef subprocesses | |
12175 | obj = Fsymbol_name (Fprocess_status (obj)); | |
12176 | #endif | |
12177 | break; | |
d39b6696 | 12178 | |
1af9f229 RS |
12179 | case 't': /* indicate TEXT or BINARY */ |
12180 | #ifdef MODE_LINE_BINARY_TEXT | |
12181 | return MODE_LINE_BINARY_TEXT (b); | |
12182 | #else | |
12183 | return "T"; | |
12184 | #endif | |
1c9241f5 KH |
12185 | |
12186 | case 'z': | |
12187 | /* coding-system (not including end-of-line format) */ | |
12188 | case 'Z': | |
12189 | /* coding-system (including end-of-line type) */ | |
12190 | { | |
12191 | int eol_flag = (c == 'Z'); | |
539b4d41 | 12192 | char *p = decode_mode_spec_buf; |
1c9241f5 | 12193 | |
d30e754b | 12194 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 12195 | { |
11c52c4f RS |
12196 | /* No need to mention EOL here--the terminal never needs |
12197 | to do EOL conversion. */ | |
12198 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
12199 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 12200 | } |
f13c925f | 12201 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 12202 | p, eol_flag); |
f13c925f | 12203 | |
11c52c4f | 12204 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
12205 | #ifdef subprocesses |
12206 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
12207 | if (PROCESSP (obj)) | |
12208 | { | |
12209 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
12210 | p, eol_flag); | |
12211 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
12212 | p, eol_flag); | |
12213 | } | |
12214 | #endif /* subprocesses */ | |
11c52c4f | 12215 | #endif /* 0 */ |
1c9241f5 KH |
12216 | *p = 0; |
12217 | return decode_mode_spec_buf; | |
12218 | } | |
a2889657 | 12219 | } |
d39b6696 | 12220 | |
e24c997d | 12221 | if (STRINGP (obj)) |
a2889657 JB |
12222 | return (char *) XSTRING (obj)->data; |
12223 | else | |
12224 | return ""; | |
12225 | } | |
5f5c8ee5 GM |
12226 | |
12227 | ||
12adba34 RS |
12228 | /* Count up to COUNT lines starting from START / START_BYTE. |
12229 | But don't go beyond LIMIT_BYTE. | |
12230 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 12231 | |
12adba34 | 12232 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
12233 | |
12234 | static int | |
12adba34 RS |
12235 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
12236 | int start, start_byte, limit_byte, count; | |
12237 | int *byte_pos_ptr; | |
59b49f63 | 12238 | { |
59b49f63 RS |
12239 | register unsigned char *cursor; |
12240 | unsigned char *base; | |
12241 | ||
12242 | register int ceiling; | |
12243 | register unsigned char *ceiling_addr; | |
12adba34 | 12244 | int orig_count = count; |
59b49f63 RS |
12245 | |
12246 | /* If we are not in selective display mode, | |
12247 | check only for newlines. */ | |
12adba34 RS |
12248 | int selective_display = (!NILP (current_buffer->selective_display) |
12249 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
12250 | |
12251 | if (count > 0) | |
12adba34 RS |
12252 | { |
12253 | while (start_byte < limit_byte) | |
12254 | { | |
12255 | ceiling = BUFFER_CEILING_OF (start_byte); | |
12256 | ceiling = min (limit_byte - 1, ceiling); | |
12257 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
12258 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
12259 | while (1) | |
12260 | { | |
12261 | if (selective_display) | |
12262 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
12263 | ; | |
12264 | else | |
12265 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
12266 | ; | |
12267 | ||
12268 | if (cursor != ceiling_addr) | |
12269 | { | |
12270 | if (--count == 0) | |
12271 | { | |
12272 | start_byte += cursor - base + 1; | |
12273 | *byte_pos_ptr = start_byte; | |
12274 | return orig_count; | |
12275 | } | |
12276 | else | |
12277 | if (++cursor == ceiling_addr) | |
12278 | break; | |
12279 | } | |
12280 | else | |
12281 | break; | |
12282 | } | |
12283 | start_byte += cursor - base; | |
12284 | } | |
12285 | } | |
59b49f63 RS |
12286 | else |
12287 | { | |
12adba34 RS |
12288 | while (start_byte > limit_byte) |
12289 | { | |
12290 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
12291 | ceiling = max (limit_byte, ceiling); | |
12292 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
12293 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
12294 | while (1) |
12295 | { | |
12adba34 RS |
12296 | if (selective_display) |
12297 | while (--cursor != ceiling_addr | |
12298 | && *cursor != '\n' && *cursor != 015) | |
12299 | ; | |
12300 | else | |
12301 | while (--cursor != ceiling_addr && *cursor != '\n') | |
12302 | ; | |
12303 | ||
59b49f63 RS |
12304 | if (cursor != ceiling_addr) |
12305 | { | |
12306 | if (++count == 0) | |
12307 | { | |
12adba34 RS |
12308 | start_byte += cursor - base + 1; |
12309 | *byte_pos_ptr = start_byte; | |
12310 | /* When scanning backwards, we should | |
12311 | not count the newline posterior to which we stop. */ | |
12312 | return - orig_count - 1; | |
59b49f63 RS |
12313 | } |
12314 | } | |
12315 | else | |
12316 | break; | |
12317 | } | |
12adba34 RS |
12318 | /* Here we add 1 to compensate for the last decrement |
12319 | of CURSOR, which took it past the valid range. */ | |
12320 | start_byte += cursor - base + 1; | |
59b49f63 RS |
12321 | } |
12322 | } | |
12323 | ||
12adba34 | 12324 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 12325 | |
12adba34 RS |
12326 | if (count < 0) |
12327 | return - orig_count + count; | |
12328 | return orig_count - count; | |
aa6d10fa | 12329 | |
12adba34 | 12330 | } |
a2889657 | 12331 | |
a2889657 | 12332 | |
5f5c8ee5 GM |
12333 | \f |
12334 | /*********************************************************************** | |
12335 | Displaying strings | |
12336 | ***********************************************************************/ | |
278feba9 | 12337 | |
5f5c8ee5 | 12338 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 12339 | |
5f5c8ee5 GM |
12340 | If STRING is non-null, display that C string. Otherwise, the Lisp |
12341 | string LISP_STRING is displayed. | |
a2889657 | 12342 | |
5f5c8ee5 GM |
12343 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
12344 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
12345 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 12346 | |
5f5c8ee5 GM |
12347 | Display the string in the environment given by IT, but use the |
12348 | standard display table, temporarily. | |
a3788d53 | 12349 | |
5f5c8ee5 GM |
12350 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
12351 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
12352 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
12353 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
12354 | ||
12355 | PRECISION is the maximum number of characters to output from | |
12356 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 12357 | |
5f5c8ee5 | 12358 | This is roughly equivalent to printf format specifiers: |
a2889657 | 12359 | |
5f5c8ee5 GM |
12360 | FIELD_WIDTH PRECISION PRINTF |
12361 | ---------------------------------------- | |
12362 | -1 -1 %s | |
12363 | -1 10 %.10s | |
12364 | 10 -1 %10s | |
12365 | 20 10 %20.10s | |
a2889657 | 12366 | |
5f5c8ee5 GM |
12367 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
12368 | display them, and < 0 means obey the current buffer's value of | |
12369 | enable_multibyte_characters. | |
278feba9 | 12370 | |
5f5c8ee5 | 12371 | Value is the number of glyphs produced. */ |
b1d1124b | 12372 | |
5f5c8ee5 GM |
12373 | static int |
12374 | display_string (string, lisp_string, face_string, face_string_pos, | |
12375 | start, it, field_width, precision, max_x, multibyte) | |
12376 | unsigned char *string; | |
12377 | Lisp_Object lisp_string; | |
12378 | int start; | |
12379 | struct it *it; | |
12380 | int field_width, precision, max_x; | |
12381 | int multibyte; | |
12382 | { | |
12383 | int hpos_at_start = it->hpos; | |
12384 | int saved_face_id = it->face_id; | |
12385 | struct glyph_row *row = it->glyph_row; | |
12386 | ||
12387 | /* Initialize the iterator IT for iteration over STRING beginning | |
12388 | with index START. We assume that IT may be modified here (which | |
12389 | means that display_line has to do something when displaying a | |
12390 | mini-buffer prompt, which it does). */ | |
12391 | reseat_to_string (it, string, lisp_string, start, | |
12392 | precision, field_width, multibyte); | |
12393 | ||
12394 | /* If displaying STRING, set up the face of the iterator | |
12395 | from LISP_STRING, if that's given. */ | |
12396 | if (STRINGP (face_string)) | |
12397 | { | |
12398 | int endptr; | |
12399 | struct face *face; | |
12400 | ||
12401 | it->face_id | |
12402 | = face_at_string_position (it->w, face_string, face_string_pos, | |
12403 | 0, it->region_beg_charpos, | |
12404 | it->region_end_charpos, | |
12405 | &endptr, it->base_face_id); | |
12406 | face = FACE_FROM_ID (it->f, it->face_id); | |
12407 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 12408 | } |
a2889657 | 12409 | |
5f5c8ee5 GM |
12410 | /* Set max_x to the maximum allowed X position. Don't let it go |
12411 | beyond the right edge of the window. */ | |
12412 | if (max_x <= 0) | |
12413 | max_x = it->last_visible_x; | |
12414 | else | |
12415 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 12416 | |
5f5c8ee5 GM |
12417 | /* Skip over display elements that are not visible. because IT->w is |
12418 | hscrolled. */ | |
12419 | if (it->current_x < it->first_visible_x) | |
12420 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
12421 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 12422 | |
5f5c8ee5 GM |
12423 | row->ascent = it->max_ascent; |
12424 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12425 | row->phys_ascent = it->max_phys_ascent; |
12426 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 12427 | |
5f5c8ee5 GM |
12428 | /* This condition is for the case that we are called with current_x |
12429 | past last_visible_x. */ | |
12430 | while (it->current_x < max_x) | |
a2889657 | 12431 | { |
5f5c8ee5 | 12432 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 12433 | |
5f5c8ee5 GM |
12434 | /* Get the next display element. */ |
12435 | if (!get_next_display_element (it)) | |
90adcf20 | 12436 | break; |
1c9241f5 | 12437 | |
5f5c8ee5 GM |
12438 | /* Produce glyphs. */ |
12439 | x_before = it->current_x; | |
12440 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
12441 | PRODUCE_GLYPHS (it); | |
90adcf20 | 12442 | |
5f5c8ee5 GM |
12443 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
12444 | i = 0; | |
12445 | x = x_before; | |
12446 | while (i < nglyphs) | |
a2889657 | 12447 | { |
5f5c8ee5 GM |
12448 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
12449 | ||
12450 | if (!it->truncate_lines_p | |
12451 | && x + glyph->pixel_width > max_x) | |
12452 | { | |
12453 | /* End of continued line or max_x reached. */ | |
12454 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
12455 | it->current_x = x; | |
12456 | break; | |
12457 | } | |
12458 | else if (x + glyph->pixel_width > it->first_visible_x) | |
12459 | { | |
12460 | /* Glyph is at least partially visible. */ | |
12461 | ++it->hpos; | |
12462 | if (x < it->first_visible_x) | |
12463 | it->glyph_row->x = x - it->first_visible_x; | |
12464 | } | |
12465 | else | |
a2889657 | 12466 | { |
5f5c8ee5 GM |
12467 | /* Glyph is off the left margin of the display area. |
12468 | Should not happen. */ | |
12469 | abort (); | |
a2889657 | 12470 | } |
5f5c8ee5 GM |
12471 | |
12472 | row->ascent = max (row->ascent, it->max_ascent); | |
12473 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12474 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12475 | row->phys_height = max (row->phys_height, | |
12476 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
12477 | x += glyph->pixel_width; |
12478 | ++i; | |
a2889657 | 12479 | } |
5f5c8ee5 GM |
12480 | |
12481 | /* Stop if max_x reached. */ | |
12482 | if (i < nglyphs) | |
12483 | break; | |
12484 | ||
12485 | /* Stop at line ends. */ | |
12486 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 12487 | { |
5f5c8ee5 GM |
12488 | it->continuation_lines_width = 0; |
12489 | break; | |
a2889657 | 12490 | } |
1c9241f5 | 12491 | |
5f5c8ee5 | 12492 | set_iterator_to_next (it); |
a688bb24 | 12493 | |
5f5c8ee5 GM |
12494 | /* Stop if truncating at the right edge. */ |
12495 | if (it->truncate_lines_p | |
12496 | && it->current_x >= it->last_visible_x) | |
12497 | { | |
12498 | /* Add truncation mark, but don't do it if the line is | |
12499 | truncated at a padding space. */ | |
12500 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 12501 | { |
5f5c8ee5 GM |
12502 | if (!FRAME_WINDOW_P (it->f)) |
12503 | produce_special_glyphs (it, IT_TRUNCATION); | |
12504 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 12505 | } |
5f5c8ee5 | 12506 | break; |
1c9241f5 | 12507 | } |
a2889657 JB |
12508 | } |
12509 | ||
5f5c8ee5 GM |
12510 | /* Maybe insert a truncation at the left. */ |
12511 | if (it->first_visible_x | |
12512 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 12513 | { |
5f5c8ee5 GM |
12514 | if (!FRAME_WINDOW_P (it->f)) |
12515 | insert_left_trunc_glyphs (it); | |
12516 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
12517 | } |
12518 | ||
5f5c8ee5 GM |
12519 | it->face_id = saved_face_id; |
12520 | ||
12521 | /* Value is number of columns displayed. */ | |
12522 | return it->hpos - hpos_at_start; | |
12523 | } | |
a2889657 | 12524 | |
a2889657 | 12525 | |
a2889657 | 12526 | \f |
5f5c8ee5 GM |
12527 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
12528 | appears as an element of LIST or as the car of an element of LIST. | |
12529 | If PROPVAL is a list, compare each element against LIST in that | |
12530 | way, and return 1 if any element of PROPVAL is found in LIST. | |
12531 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12532 | |
12533 | int | |
12534 | invisible_p (propval, list) | |
12535 | register Lisp_Object propval; | |
12536 | Lisp_Object list; | |
12537 | { | |
af460d46 | 12538 | register Lisp_Object tail, proptail; |
9472f927 | 12539 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
642eefc6 RS |
12540 | { |
12541 | register Lisp_Object tem; | |
9472f927 | 12542 | tem = XCAR (tail); |
642eefc6 RS |
12543 | if (EQ (propval, tem)) |
12544 | return 1; | |
9472f927 | 12545 | if (CONSP (tem) && EQ (propval, XCAR (tem))) |
642eefc6 RS |
12546 | return 1; |
12547 | } | |
af460d46 RS |
12548 | if (CONSP (propval)) |
12549 | for (proptail = propval; CONSP (proptail); | |
9472f927 | 12550 | proptail = XCDR (proptail)) |
af460d46 RS |
12551 | { |
12552 | Lisp_Object propelt; | |
9472f927 GM |
12553 | propelt = XCAR (proptail); |
12554 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
12555 | { |
12556 | register Lisp_Object tem; | |
9472f927 | 12557 | tem = XCAR (tail); |
af460d46 RS |
12558 | if (EQ (propelt, tem)) |
12559 | return 1; | |
9472f927 | 12560 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) |
af460d46 RS |
12561 | return 1; |
12562 | } | |
12563 | } | |
642eefc6 RS |
12564 | return 0; |
12565 | } | |
12566 | ||
5f5c8ee5 GM |
12567 | |
12568 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
12569 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
12570 | each element of PROPVAL in that way, and the first time some | |
12571 | element is found, return 1 if the cdr of that element is non-nil. | |
12572 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12573 | |
12574 | int | |
12575 | invisible_ellipsis_p (propval, list) | |
12576 | register Lisp_Object propval; | |
12577 | Lisp_Object list; | |
12578 | { | |
af460d46 | 12579 | register Lisp_Object tail, proptail; |
9472f927 GM |
12580 | |
12581 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
642eefc6 RS |
12582 | { |
12583 | register Lisp_Object tem; | |
9472f927 GM |
12584 | tem = XCAR (tail); |
12585 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
12586 | return ! NILP (XCDR (tem)); | |
642eefc6 | 12587 | } |
9472f927 | 12588 | |
af460d46 | 12589 | if (CONSP (propval)) |
9472f927 | 12590 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) |
af460d46 RS |
12591 | { |
12592 | Lisp_Object propelt; | |
9472f927 GM |
12593 | propelt = XCAR (proptail); |
12594 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
12595 | { |
12596 | register Lisp_Object tem; | |
9472f927 GM |
12597 | tem = XCAR (tail); |
12598 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
12599 | return ! NILP (XCDR (tem)); | |
af460d46 RS |
12600 | } |
12601 | } | |
9472f927 | 12602 | |
642eefc6 RS |
12603 | return 0; |
12604 | } | |
5f5c8ee5 GM |
12605 | |
12606 | ||
642eefc6 | 12607 | \f |
5f5c8ee5 GM |
12608 | /*********************************************************************** |
12609 | Initialization | |
12610 | ***********************************************************************/ | |
12611 | ||
a2889657 JB |
12612 | void |
12613 | syms_of_xdisp () | |
12614 | { | |
c6e89d6c GM |
12615 | Vwith_echo_area_save_vector = Qnil; |
12616 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 12617 | |
c6e89d6c GM |
12618 | Vmessage_stack = Qnil; |
12619 | staticpro (&Vmessage_stack); | |
12620 | ||
735c094c | 12621 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 12622 | staticpro (&Qinhibit_redisplay); |
735c094c | 12623 | |
5f5c8ee5 GM |
12624 | #if GLYPH_DEBUG |
12625 | defsubr (&Sdump_glyph_matrix); | |
12626 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 12627 | defsubr (&Sdump_tool_bar_row); |
5f5c8ee5 GM |
12628 | defsubr (&Strace_redisplay_toggle); |
12629 | #endif | |
12630 | ||
cf074754 RS |
12631 | staticpro (&Qmenu_bar_update_hook); |
12632 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
12633 | ||
d46fb96a | 12634 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 12635 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 12636 | |
399164b4 KH |
12637 | staticpro (&Qoverriding_local_map); |
12638 | Qoverriding_local_map = intern ("overriding-local-map"); | |
12639 | ||
75c43375 RS |
12640 | staticpro (&Qwindow_scroll_functions); |
12641 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
12642 | ||
e0bfbde6 RS |
12643 | staticpro (&Qredisplay_end_trigger_functions); |
12644 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 12645 | |
2e54982e RS |
12646 | staticpro (&Qinhibit_point_motion_hooks); |
12647 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
12648 | ||
5f5c8ee5 | 12649 | Qdisplay = intern ("display"); |
f3751a65 | 12650 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
12651 | Qspace_width = intern ("space-width"); |
12652 | staticpro (&Qspace_width); | |
12653 | Qheight = intern ("height"); | |
12654 | staticpro (&Qheight); | |
12655 | Qraise = intern ("raise"); | |
12656 | staticpro (&Qraise); | |
12657 | Qspace = intern ("space"); | |
12658 | staticpro (&Qspace); | |
f3751a65 GM |
12659 | Qmargin = intern ("margin"); |
12660 | staticpro (&Qmargin); | |
5f5c8ee5 | 12661 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 12662 | staticpro (&Qleft_margin); |
5f5c8ee5 | 12663 | Qright_margin = intern ("right-margin"); |
f3751a65 | 12664 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
12665 | Qalign_to = intern ("align-to"); |
12666 | staticpro (&Qalign_to); | |
12667 | QCalign_to = intern (":align-to"); | |
12668 | staticpro (&QCalign_to); | |
12669 | Qwidth = intern ("width"); | |
12670 | staticpro (&Qwidth); | |
12671 | Qrelative_width = intern ("relative-width"); | |
12672 | staticpro (&Qrelative_width); | |
12673 | QCrelative_width = intern (":relative-width"); | |
12674 | staticpro (&QCrelative_width); | |
12675 | QCrelative_height = intern (":relative-height"); | |
12676 | staticpro (&QCrelative_height); | |
12677 | QCeval = intern (":eval"); | |
12678 | staticpro (&QCeval); | |
d3acf96b | 12679 | Qwhen = intern ("when"); |
f3751a65 | 12680 | staticpro (&Qwhen); |
886bd6f2 GM |
12681 | QCfile = intern (":file"); |
12682 | staticpro (&QCfile); | |
5f5c8ee5 GM |
12683 | Qfontified = intern ("fontified"); |
12684 | staticpro (&Qfontified); | |
12685 | Qfontification_functions = intern ("fontification-functions"); | |
12686 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
12687 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
12688 | staticpro (&Qtrailing_whitespace); | |
12689 | Qimage = intern ("image"); | |
12690 | staticpro (&Qimage); | |
12691 | ||
a2889657 JB |
12692 | last_arrow_position = Qnil; |
12693 | last_arrow_string = Qnil; | |
f3751a65 GM |
12694 | staticpro (&last_arrow_position); |
12695 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
12696 | |
12697 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
12698 | staticpro (&echo_buffer[0]); | |
12699 | staticpro (&echo_buffer[1]); | |
12700 | ||
12701 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
12702 | staticpro (&echo_area_buffer[0]); | |
12703 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 12704 | |
8f897821 GM |
12705 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
12706 | "Non-nil means highlight trailing whitespace.\n\ | |
12707 | The face used for trailing whitespace is `trailing-whitespace'."); | |
12708 | Vshow_trailing_whitespace = Qnil; | |
12709 | ||
735c094c KH |
12710 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
12711 | "Non-nil means don't actually do any redisplay.\n\ | |
12712 | This is used for internal purposes."); | |
12713 | Vinhibit_redisplay = Qnil; | |
12714 | ||
a2889657 | 12715 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 12716 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
12717 | Vglobal_mode_string = Qnil; |
12718 | ||
12719 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
12720 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
12721 | This must be the beginning of a line in order to work.\n\ | |
12722 | See also `overlay-arrow-string'."); | |
12723 | Voverlay_arrow_position = Qnil; | |
12724 | ||
12725 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
12726 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
12727 | Voverlay_arrow_string = Qnil; | |
12728 | ||
12729 | DEFVAR_INT ("scroll-step", &scroll_step, | |
12730 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
12731 | If that fails to bring point back on frame, point is centered instead.\n\ |
12732 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 12733 | |
0789adb2 RS |
12734 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
12735 | "*Scroll up to this many lines, to bring point back on screen."); | |
12736 | scroll_conservatively = 0; | |
12737 | ||
9afd2168 RS |
12738 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
12739 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
12740 | Recenter the window whenever point gets within this many lines\n\ | |
12741 | of the top or bottom of the window."); | |
12742 | scroll_margin = 0; | |
12743 | ||
5f5c8ee5 | 12744 | #if GLYPH_DEBUG |
a2889657 | 12745 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 12746 | #endif |
a2889657 JB |
12747 | |
12748 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
12749 | &truncate_partial_width_windows, | |
44fa5b1e | 12750 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
12751 | truncate_partial_width_windows = 1; |
12752 | ||
12753 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
12754 | "*Non-nil means use inverse video for the mode line."); | |
12755 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
12756 | |
12757 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5f5c8ee5 | 12758 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 12759 | If the buffer is bigger than this, the line number does not appear\n\ |
9f027393 | 12760 | in the mode line."); |
aa6d10fa | 12761 | line_number_display_limit = 1000000; |
fba9ce76 | 12762 | |
5d121aec KH |
12763 | DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width, |
12764 | "*Maximum line width (in characters) for line number display.\n\ | |
12765 | If the average length of the lines near point is bigger than this, then the\n\ | |
12766 | line number may be omitted from the mode line."); | |
12767 | line_number_display_limit_width = 200; | |
12768 | ||
fba9ce76 RS |
12769 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
12770 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 12771 | highlight_nonselected_windows = 0; |
d39b6696 KH |
12772 | |
12773 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
12774 | "Non-nil if more than one frame is visible on this display.\n\ |
12775 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
12776 | This variable is not guaranteed to be accurate except while processing\n\ |
12777 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
12778 | |
12779 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 12780 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
12781 | \(Assuming the window manager supports this feature.)\n\ |
12782 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12783 | and is used only on frames for which no explicit name has been set\n\ | |
12784 | \(see `modify-frame-parameters')."); | |
12785 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 12786 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
12787 | \(Assuming the window manager supports this feature.)\n\ |
12788 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12789 | and is used only on frames for which no explicit name has been set\n\ | |
12790 | \(see `modify-frame-parameters')."); | |
12791 | Vicon_title_format | |
12792 | = Vframe_title_format | |
12793 | = Fcons (intern ("multiple-frames"), | |
12794 | Fcons (build_string ("%b"), | |
12795 | Fcons (Fcons (build_string (""), | |
12796 | Fcons (intern ("invocation-name"), | |
12797 | Fcons (build_string ("@"), | |
12798 | Fcons (intern ("system-name"), | |
12799 | Qnil)))), | |
12800 | Qnil))); | |
5992c4f7 KH |
12801 | |
12802 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
12803 | "Maximum number of lines to keep in the message log buffer.\n\ | |
12804 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
12805 | the buffer when it becomes large."); | |
12806 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
12807 | |
12808 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
12809 | "Functions called before redisplay, if window sizes have changed.\n\ | |
12810 | The value should be a list of functions that take one argument.\n\ | |
12811 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
12812 | size since the last redisplay, or have been split or deleted,\n\ | |
12813 | all the functions in the list are called, with the frame as argument."); | |
12814 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
12815 | |
12816 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 12817 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 12818 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
12819 | and its new display-start position. Note that the value of `window-end'\n\ |
12820 | is not valid when these functions are called."); | |
75c43375 | 12821 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 12822 | |
e037b9ec GM |
12823 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
12824 | "*Non-nil means automatically resize tool-bars.\n\ | |
12825 | This increases a tool-bar's height if not all tool-bar items are visible.\n\ | |
12826 | It decreases a tool-bar's height when it would display blank lines\n\ | |
5f5c8ee5 | 12827 | otherwise."); |
e037b9ec | 12828 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 12829 | |
e037b9ec GM |
12830 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
12831 | "*Non-nil means raise tool-bar buttons when the mouse moves over them."); | |
12832 | auto_raise_tool_bar_buttons_p = 1; | |
5f5c8ee5 | 12833 | |
e037b9ec GM |
12834 | DEFVAR_INT ("tool-bar-button-margin", &tool_bar_button_margin, |
12835 | "*Margin around tool-bar buttons in pixels."); | |
12836 | tool_bar_button_margin = 1; | |
5f5c8ee5 | 12837 | |
e037b9ec GM |
12838 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
12839 | "Relief thickness of tool-bar buttons."); | |
12840 | tool_bar_button_relief = 3; | |
5f5c8ee5 GM |
12841 | |
12842 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
12843 | "List of functions to call to fontify regions of text.\n\ | |
12844 | Each function is called with one argument POS. Functions must\n\ | |
12845 | fontify a region starting at POS in the current buffer, and give\n\ | |
12846 | fontified regions the property `fontified'.\n\ | |
12847 | This variable automatically becomes buffer-local when set."); | |
12848 | Vfontification_functions = Qnil; | |
12849 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
12850 | |
12851 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
12852 | &unibyte_display_via_language_environment, |
12853 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
12854 | Specifically this means that unibyte non-ASCII characters\n\ |
12855 | are displayed by converting them to the equivalent multibyte characters\n\ | |
12856 | according to the current language environment. As a result, they are\n\ | |
12857 | displayed according to the current fontset."); | |
12858 | unibyte_display_via_language_environment = 0; | |
c6e89d6c GM |
12859 | |
12860 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, | |
12861 | "*Maximum height for resizing mini-windows.\n\ | |
12862 | If a float, it specifies a fraction of the mini-window frame's height.\n\ | |
97cafc0f GM |
12863 | If an integer, it specifies a number of lines.\n\ |
12864 | If nil, don't resize."); | |
c6e89d6c | 12865 | Vmax_mini_window_height = make_float (0.25); |
a2889657 JB |
12866 | } |
12867 | ||
5f5c8ee5 GM |
12868 | |
12869 | /* Initialize this module when Emacs starts. */ | |
12870 | ||
dfcf069d | 12871 | void |
a2889657 JB |
12872 | init_xdisp () |
12873 | { | |
12874 | Lisp_Object root_window; | |
5f5c8ee5 | 12875 | struct window *mini_w; |
a2889657 | 12876 | |
5f5c8ee5 | 12877 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
12878 | |
12879 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 12880 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 12881 | |
a2889657 JB |
12882 | if (!noninteractive) |
12883 | { | |
5f5c8ee5 GM |
12884 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
12885 | int i; | |
12886 | ||
12887 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 12888 | set_window_height (root_window, |
5f5c8ee5 | 12889 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 12890 | 0); |
c2213350 | 12891 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
12892 | set_window_height (minibuf_window, 1, 0); |
12893 | ||
c2213350 KH |
12894 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
12895 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
12896 | |
12897 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
12898 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
12899 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
12900 | ||
12901 | /* The default ellipsis glyphs `...'. */ | |
12902 | for (i = 0; i < 3; ++i) | |
12903 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 12904 | } |
5f5c8ee5 GM |
12905 | |
12906 | #ifdef HAVE_WINDOW_SYSTEM | |
12907 | { | |
12908 | /* Allocate the buffer for frame titles. */ | |
12909 | int size = 100; | |
12910 | frame_title_buf = (char *) xmalloc (size); | |
12911 | frame_title_buf_end = frame_title_buf + size; | |
12912 | frame_title_ptr = NULL; | |
12913 | } | |
12914 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 12915 | } |
5f5c8ee5 GM |
12916 | |
12917 |