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a2889657 | 1 | /* Display generation from window structure and buffer text. |
5f5c8ee5 GM |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99 |
3 | Free Software Foundation, Inc. | |
a2889657 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
b1d1124b | 9 | the Free Software Foundation; either version 2, or (at your option) |
a2889657 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
a2889657 | 21 | |
5f5c8ee5 GM |
22 | /* New redisplay written by Gerd Moellmann <gerd@gnu.org>. |
23 | ||
24 | Redisplay. | |
25 | ||
26 | Emacs separates the task of updating the display from code | |
27 | modifying global state, e.g. buffer text. This way functions | |
28 | operating on buffers don't also have to be concerned with updating | |
29 | the display. | |
30 | ||
31 | Updating the display is triggered by the Lisp interpreter when it | |
32 | decides it's time to do it. This is done either automatically for | |
33 | you as part of the interpreter's command loop or as the result of | |
34 | calling Lisp functions like `sit-for'. The C function `redisplay' | |
35 | in xdisp.c is the only entry into the inner redisplay code. (Or, | |
36 | let's say almost---see the the description of direct update | |
37 | operations, below.). | |
38 | ||
39 | The following diagram shows how redisplay code is invoked. As you | |
40 | can see, Lisp calls redisplay and vice versa. Under window systems | |
41 | like X, some portions of the redisplay code are also called | |
42 | asynchronously during mouse movement or expose events. It is very | |
43 | important that these code parts do NOT use the C library (malloc, | |
44 | free) because many C libraries under Unix are not reentrant. They | |
45 | may also NOT call functions of the Lisp interpreter which could | |
46 | change the interpreter's state. If you don't follow these rules, | |
47 | you will encounter bugs which are very hard to explain. | |
48 | ||
49 | (Direct functions, see below) | |
50 | direct_output_for_insert, | |
51 | direct_forward_char (dispnew.c) | |
52 | +---------------------------------+ | |
53 | | | | |
54 | | V | |
55 | +--------------+ redisplay() +----------------+ | |
56 | | Lisp machine |---------------->| Redisplay code |<--+ | |
57 | +--------------+ (xdisp.c) +----------------+ | | |
58 | ^ | | | |
59 | +----------------------------------+ | | |
60 | Don't use this path when called | | |
61 | asynchronously! | | |
62 | | | |
63 | expose_window (asynchronous) | | |
64 | | | |
65 | X expose events -----+ | |
66 | ||
67 | What does redisplay? Obviously, it has to figure out somehow what | |
68 | has been changed since the last time the display has been updated, | |
69 | and to make these changes visible. Preferably it would do that in | |
70 | a moderately intelligent way, i.e. fast. | |
71 | ||
72 | Changes in buffer text can be deduced from window and buffer | |
73 | structures, and from some global variables like `beg_unchanged' and | |
74 | `end_unchanged'. The contents of the display are additionally | |
75 | recorded in a `glyph matrix', a two-dimensional matrix of glyph | |
76 | structures. Each row in such a matrix corresponds to a line on the | |
77 | display, and each glyph in a row corresponds to a column displaying | |
78 | a character, an image, or what else. This matrix is called the | |
79 | `current glyph matrix' or `current matrix' in redisplay | |
80 | terminology. | |
81 | ||
82 | For buffer parts that have been changed since the last update, a | |
83 | second glyph matrix is constructed, the so called `desired glyph | |
84 | matrix' or short `desired matrix'. Current and desired matrix are | |
85 | then compared to find a cheap way to update the display, e.g. by | |
86 | reusing part of the display by scrolling lines. | |
87 | ||
88 | ||
89 | Direct operations. | |
90 | ||
91 | You will find a lot of of redisplay optimizations when you start | |
92 | looking at the innards of redisplay. The overall goal of all these | |
93 | optimizations is to make redisplay fast because it is done | |
94 | frequently. | |
95 | ||
96 | Two optimizations are not found in xdisp.c. These are the direct | |
97 | operations mentioned above. As the name suggests they follow a | |
98 | different principle than the rest of redisplay. Instead of | |
99 | building a desired matrix and then comparing it with the current | |
100 | display, they perform their actions directly on the display and on | |
101 | the current matrix. | |
102 | ||
103 | One direct operation updates the display after one character has | |
104 | been entered. The other one moves the cursor by one position | |
105 | forward or backward. You find these functions under the names | |
106 | `direct_output_for_insert' and `direct_output_forward_char' in | |
107 | dispnew.c. | |
108 | ||
109 | ||
110 | Desired matrices. | |
111 | ||
112 | Desired matrices are always built per Emacs window. The function | |
113 | `display_line' is the central function to look at if you are | |
114 | interested. It constructs one row in a desired matrix given an | |
115 | iterator structure containing both a buffer position and a | |
116 | description of the environment in which the text is to be | |
117 | displayed. But this is too early, read on. | |
118 | ||
119 | Characters and pixmaps displayed for a range of buffer text depend | |
120 | on various settings of buffers and windows, on overlays and text | |
121 | properties, on display tables, on selective display. The good news | |
122 | is that all this hairy stuff is hidden behind a small set of | |
123 | interface functions taking a iterator structure (struct it) | |
124 | argument. | |
125 | ||
126 | Iteration over things to be be displayed is then simple. It is | |
127 | started by initializing an iterator with a call to init_iterator | |
128 | (or init_string_iterator for that matter). Calls to | |
129 | get_next_display_element fill the iterator structure with relevant | |
130 | information about the next thing to display. Calls to | |
131 | set_iterator_to_next move the iterator to the next thing. | |
132 | ||
133 | Besides this, an iterator also contains information about the | |
134 | display environment in which glyphs for display elements are to be | |
135 | produced. It has fields for the width and height of the display, | |
136 | the information whether long lines are truncated or continued, a | |
137 | current X and Y position, and lots of other stuff you can better | |
138 | see in dispextern.h. | |
139 | ||
140 | Glyphs in a desired matrix are normally constructed in a loop | |
141 | calling get_next_display_element and then produce_glyphs. The call | |
142 | to produce_glyphs will fill the iterator structure with pixel | |
143 | information about the element being displayed and at the same time | |
144 | produce glyphs for it. If the display element fits on the line | |
145 | being displayed, set_iterator_to_next is called next, otherwise the | |
146 | glyphs produced are discarded. | |
147 | ||
148 | ||
149 | Frame matrices. | |
150 | ||
151 | That just couldn't be all, could it? What about terminal types not | |
152 | supporting operations on sub-windows of the screen? To update the | |
153 | display on such a terminal, window-based glyph matrices are not | |
154 | well suited. To be able to reuse part of the display (scrolling | |
155 | lines up and down), we must instead have a view of the whole | |
156 | screen. This is what `frame matrices' are for. They are a trick. | |
157 | ||
158 | Frames on terminals like above have a glyph pool. Windows on such | |
159 | a frame sub-allocate their glyph memory from their frame's glyph | |
160 | pool. The frame itself is given its own glyph matrices. By | |
161 | coincidence---or maybe something else---rows in window glyph | |
162 | matrices are slices of corresponding rows in frame matrices. Thus | |
163 | writing to window matrices implicitly updates a frame matrix which | |
164 | provides us with the view of the whole screen that we originally | |
165 | wanted to have without having to move many bytes around. To be | |
166 | honest, there is a little bit more done, but not much more. If you | |
167 | plan to extend that code, take a look at dispnew.c. The function | |
168 | build_frame_matrix is a good starting point. */ | |
a2889657 | 169 | |
18160b98 | 170 | #include <config.h> |
a2889657 | 171 | #include <stdio.h> |
a2889657 | 172 | #include "lisp.h" |
44fa5b1e | 173 | #include "frame.h" |
a2889657 JB |
174 | #include "window.h" |
175 | #include "termchar.h" | |
176 | #include "dispextern.h" | |
177 | #include "buffer.h" | |
1c9241f5 | 178 | #include "charset.h" |
a2889657 JB |
179 | #include "indent.h" |
180 | #include "commands.h" | |
181 | #include "macros.h" | |
182 | #include "disptab.h" | |
30c566e4 | 183 | #include "termhooks.h" |
b0a0fbda | 184 | #include "intervals.h" |
fe8b0cf8 | 185 | #include "keyboard.h" |
1c9241f5 KH |
186 | #include "coding.h" |
187 | #include "process.h" | |
dfcf069d AS |
188 | #include "region-cache.h" |
189 | ||
6d55d620 | 190 | #ifdef HAVE_X_WINDOWS |
dfcf069d AS |
191 | #include "xterm.h" |
192 | #endif | |
a75dfea0 AI |
193 | #ifdef WINDOWSNT |
194 | #include "w32term.h" | |
195 | #endif | |
a2889657 | 196 | |
5f5c8ee5 GM |
197 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
198 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
199 | ||
200 | #define INFINITY 10000000 | |
201 | ||
8f3343d0 | 202 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
76412d64 | 203 | extern void set_frame_menubar (); |
cd6dfed6 | 204 | extern int pending_menu_activation; |
76412d64 RS |
205 | #endif |
206 | ||
a2889657 JB |
207 | extern int interrupt_input; |
208 | extern int command_loop_level; | |
209 | ||
b6436d4e RS |
210 | extern int minibuffer_auto_raise; |
211 | ||
c4628384 RS |
212 | extern Lisp_Object Qface; |
213 | ||
399164b4 KH |
214 | extern Lisp_Object Voverriding_local_map; |
215 | extern Lisp_Object Voverriding_local_map_menu_flag; | |
5f5c8ee5 | 216 | extern Lisp_Object Qmenu_item; |
399164b4 | 217 | |
d46fb96a | 218 | Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; |
75c43375 | 219 | Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; |
e0bfbde6 | 220 | Lisp_Object Qredisplay_end_trigger_functions; |
2e54982e | 221 | Lisp_Object Qinhibit_point_motion_hooks; |
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 | ||
a7e27ef7 DL |
254 | Lisp_Object Qdisplay, Qrelative_width, Qalign_to; |
255 | extern Lisp_Object Qface, Qinvisible, Qimage, Qwidth; | |
5f5c8ee5 GM |
256 | |
257 | /* Symbols used in text property values. */ | |
258 | ||
259 | Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height; | |
a7e27ef7 | 260 | Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise; |
f3751a65 | 261 | Lisp_Object Qmargin; |
a7e27ef7 | 262 | extern Lisp_Object Qheight; |
5f5c8ee5 | 263 | |
8f897821 | 264 | /* Non-nil means highlight trailing whitespace. */ |
5f5c8ee5 | 265 | |
8f897821 | 266 | Lisp_Object Vshow_trailing_whitespace; |
5f5c8ee5 GM |
267 | |
268 | /* Name of the face used to highlight trailing whitespace. */ | |
269 | ||
270 | Lisp_Object Qtrailing_whitespace; | |
271 | ||
272 | /* The symbol `image' which is the car of the lists used to represent | |
273 | images in Lisp. */ | |
274 | ||
275 | Lisp_Object Qimage; | |
276 | ||
277 | /* Non-zero means print newline to stdout before next mini-buffer | |
278 | message. */ | |
a2889657 JB |
279 | |
280 | int noninteractive_need_newline; | |
281 | ||
5f5c8ee5 | 282 | /* Non-zero means print newline to message log before next message. */ |
f88eb0b6 | 283 | |
3c6595e0 | 284 | static int message_log_need_newline; |
f88eb0b6 | 285 | |
5f5c8ee5 GM |
286 | \f |
287 | /* The buffer position of the first character appearing entirely or | |
288 | partially on the line of the selected window which contains the | |
289 | cursor; <= 0 if not known. Set by set_cursor_from_row, used for | |
290 | redisplay optimization in redisplay_internal. */ | |
a2889657 | 291 | |
5f5c8ee5 | 292 | static struct text_pos this_line_start_pos; |
a2889657 | 293 | |
5f5c8ee5 GM |
294 | /* Number of characters past the end of the line above, including the |
295 | terminating newline. */ | |
296 | ||
297 | static struct text_pos this_line_end_pos; | |
298 | ||
299 | /* The vertical positions and the height of this line. */ | |
a2889657 | 300 | |
a2889657 | 301 | static int this_line_vpos; |
5f5c8ee5 GM |
302 | static int this_line_y; |
303 | static int this_line_pixel_height; | |
304 | ||
305 | /* X position at which this display line starts. Usually zero; | |
306 | negative if first character is partially visible. */ | |
307 | ||
308 | static int this_line_start_x; | |
a2889657 | 309 | |
5f5c8ee5 | 310 | /* Buffer that this_line_.* variables are referring to. */ |
a2889657 | 311 | |
a2889657 JB |
312 | static struct buffer *this_line_buffer; |
313 | ||
5f5c8ee5 GM |
314 | /* Nonzero means truncate lines in all windows less wide than the |
315 | frame. */ | |
a2889657 | 316 | |
a2889657 JB |
317 | int truncate_partial_width_windows; |
318 | ||
7bbe686f | 319 | /* A flag to control how to display unibyte 8-bit character. */ |
5f5c8ee5 | 320 | |
7bbe686f | 321 | int unibyte_display_via_language_environment; |
5f5c8ee5 GM |
322 | |
323 | /* Nonzero means we have more than one non-mini-buffer-only frame. | |
324 | Not guaranteed to be accurate except while parsing | |
325 | frame-title-format. */ | |
7bbe686f | 326 | |
d39b6696 KH |
327 | int multiple_frames; |
328 | ||
a2889657 JB |
329 | Lisp_Object Vglobal_mode_string; |
330 | ||
331 | /* Marker for where to display an arrow on top of the buffer text. */ | |
5f5c8ee5 | 332 | |
a2889657 JB |
333 | Lisp_Object Voverlay_arrow_position; |
334 | ||
5f5c8ee5 GM |
335 | /* String to display for the arrow. Only used on terminal frames. */ |
336 | ||
a2889657 JB |
337 | Lisp_Object Voverlay_arrow_string; |
338 | ||
5f5c8ee5 GM |
339 | /* Values of those variables at last redisplay. However, if |
340 | Voverlay_arrow_position is a marker, last_arrow_position is its | |
341 | numerical position. */ | |
342 | ||
d45de95b RS |
343 | static Lisp_Object last_arrow_position, last_arrow_string; |
344 | ||
5f5c8ee5 GM |
345 | /* Like mode-line-format, but for the title bar on a visible frame. */ |
346 | ||
d39b6696 KH |
347 | Lisp_Object Vframe_title_format; |
348 | ||
5f5c8ee5 GM |
349 | /* Like mode-line-format, but for the title bar on an iconified frame. */ |
350 | ||
d39b6696 KH |
351 | Lisp_Object Vicon_title_format; |
352 | ||
08b610e4 RS |
353 | /* List of functions to call when a window's size changes. These |
354 | functions get one arg, a frame on which one or more windows' sizes | |
355 | have changed. */ | |
5f5c8ee5 | 356 | |
08b610e4 RS |
357 | static Lisp_Object Vwindow_size_change_functions; |
358 | ||
cf074754 RS |
359 | Lisp_Object Qmenu_bar_update_hook; |
360 | ||
a2889657 | 361 | /* Nonzero if overlay arrow has been displayed once in this window. */ |
a2889657 | 362 | |
5f5c8ee5 | 363 | static int overlay_arrow_seen; |
ca26e1c8 | 364 | |
fba9ce76 | 365 | /* Nonzero means highlight the region even in nonselected windows. */ |
fba9ce76 | 366 | |
5f5c8ee5 GM |
367 | int highlight_nonselected_windows; |
368 | ||
369 | /* If cursor motion alone moves point off frame, try scrolling this | |
370 | many lines up or down if that will bring it back. */ | |
371 | ||
14510fee | 372 | static int scroll_step; |
a2889657 | 373 | |
5f5c8ee5 GM |
374 | /* Non-0 means scroll just far enough to bring point back on the |
375 | screen, when appropriate. */ | |
376 | ||
0789adb2 RS |
377 | static int scroll_conservatively; |
378 | ||
5f5c8ee5 GM |
379 | /* Recenter the window whenever point gets within this many lines of |
380 | the top or bottom of the window. This value is translated into a | |
381 | pixel value by multiplying it with CANON_Y_UNIT, which means that | |
382 | there is really a fixed pixel height scroll margin. */ | |
383 | ||
9afd2168 RS |
384 | int scroll_margin; |
385 | ||
5f5c8ee5 GM |
386 | /* Number of windows showing the buffer of the selected window (or |
387 | another buffer with the same base buffer). keyboard.c refers to | |
388 | this. */ | |
a2889657 | 389 | |
a2889657 JB |
390 | int buffer_shared; |
391 | ||
5f5c8ee5 | 392 | /* Vector containing glyphs for an ellipsis `...'. */ |
a2889657 | 393 | |
5f5c8ee5 | 394 | static Lisp_Object default_invis_vector[3]; |
a2889657 | 395 | |
5f5c8ee5 | 396 | /* Nonzero means display mode line highlighted. */ |
a2889657 | 397 | |
a2889657 JB |
398 | int mode_line_inverse_video; |
399 | ||
5f5c8ee5 GM |
400 | /* Prompt to display in front of the mini-buffer contents. */ |
401 | ||
8c5b6a0a | 402 | Lisp_Object minibuf_prompt; |
a2889657 | 403 | |
5f5c8ee5 GM |
404 | /* Width of current mini-buffer prompt. Only set after display_line |
405 | of the line that contains the prompt. */ | |
406 | ||
a2889657 | 407 | int minibuf_prompt_width; |
5f5c8ee5 GM |
408 | int minibuf_prompt_pixel_width; |
409 | ||
5f5c8ee5 GM |
410 | /* This is the window where the echo area message was displayed. It |
411 | is always a mini-buffer window, but it may not be the same window | |
412 | currently active as a mini-buffer. */ | |
413 | ||
73af359d RS |
414 | Lisp_Object echo_area_window; |
415 | ||
c6e89d6c GM |
416 | /* List of pairs (MESSAGE . MULTIBYTE). The function save_message |
417 | pushes the current message and the value of | |
418 | message_enable_multibyte on the stack, the function restore_message | |
419 | pops the stack and displays MESSAGE again. */ | |
420 | ||
421 | Lisp_Object Vmessage_stack; | |
422 | ||
a3788d53 RS |
423 | /* Nonzero means multibyte characters were enabled when the echo area |
424 | message was specified. */ | |
5f5c8ee5 | 425 | |
a3788d53 RS |
426 | int message_enable_multibyte; |
427 | ||
5f5c8ee5 GM |
428 | /* True if we should redraw the mode lines on the next redisplay. */ |
429 | ||
a2889657 JB |
430 | int update_mode_lines; |
431 | ||
5f5c8ee5 GM |
432 | /* Nonzero if window sizes or contents have changed since last |
433 | redisplay that finished */ | |
434 | ||
a2889657 JB |
435 | int windows_or_buffers_changed; |
436 | ||
5f5c8ee5 GM |
437 | /* Nonzero after display_mode_line if %l was used and it displayed a |
438 | line number. */ | |
439 | ||
aa6d10fa RS |
440 | int line_number_displayed; |
441 | ||
442 | /* Maximum buffer size for which to display line numbers. */ | |
5f5c8ee5 | 443 | |
14510fee | 444 | static int line_number_display_limit; |
5992c4f7 | 445 | |
5d121aec KH |
446 | /* line width to consider when repostioning for line number display */ |
447 | ||
448 | static int line_number_display_limit_width; | |
449 | ||
5f5c8ee5 GM |
450 | /* Number of lines to keep in the message log buffer. t means |
451 | infinite. nil means don't log at all. */ | |
452 | ||
5992c4f7 | 453 | Lisp_Object Vmessage_log_max; |
d45de95b | 454 | |
c6e89d6c GM |
455 | /* Current, index 0, and last displayed echo area message. Either |
456 | buffers from echo_buffers, or nil to indicate no message. */ | |
457 | ||
458 | Lisp_Object echo_area_buffer[2]; | |
459 | ||
460 | /* The buffers referenced from echo_area_buffer. */ | |
461 | ||
462 | static Lisp_Object echo_buffer[2]; | |
463 | ||
464 | /* A vector saved used in with_area_buffer to reduce consing. */ | |
465 | ||
466 | static Lisp_Object Vwith_echo_area_save_vector; | |
467 | ||
468 | /* Non-zero means display_echo_area should display the last echo area | |
469 | message again. Set by redisplay_preserve_echo_area. */ | |
470 | ||
471 | static int display_last_displayed_message_p; | |
472 | ||
473 | /* Nonzero if echo area is being used by print; zero if being used by | |
474 | message. */ | |
475 | ||
476 | int message_buf_print; | |
477 | ||
9142dd5b GM |
478 | /* Maximum height for resizing mini-windows. Either a float |
479 | specifying a fraction of the available height, or an integer | |
480 | specifying a number of lines. */ | |
c6e89d6c GM |
481 | |
482 | static Lisp_Object Vmax_mini_window_height; | |
483 | ||
d6d26ed3 GM |
484 | /* Non-zero means we want a hollow cursor in windows that are not |
485 | selected. Zero means there's no cursor in such windows. */ | |
486 | ||
487 | int cursor_in_non_selected_windows; | |
488 | ||
5f5c8ee5 GM |
489 | /* A scratch glyph row with contents used for generating truncation |
490 | glyphs. Also used in direct_output_for_insert. */ | |
12adba34 | 491 | |
5f5c8ee5 GM |
492 | #define MAX_SCRATCH_GLYPHS 100 |
493 | struct glyph_row scratch_glyph_row; | |
494 | static struct glyph scratch_glyphs[MAX_SCRATCH_GLYPHS]; | |
1adc55de | 495 | |
5f5c8ee5 GM |
496 | /* Ascent and height of the last line processed by move_it_to. */ |
497 | ||
498 | static int last_max_ascent, last_height; | |
499 | ||
500 | /* The maximum distance to look ahead for text properties. Values | |
501 | that are too small let us call compute_char_face and similar | |
502 | functions too often which is expensive. Values that are too large | |
503 | let us call compute_char_face and alike too often because we | |
504 | might not be interested in text properties that far away. */ | |
505 | ||
506 | #define TEXT_PROP_DISTANCE_LIMIT 100 | |
507 | ||
508 | /* Non-zero means print traces of redisplay if compiled with | |
509 | GLYPH_DEBUG != 0. */ | |
510 | ||
511 | #if GLYPH_DEBUG | |
512 | int trace_redisplay_p; | |
513 | #endif | |
514 | ||
515 | /* Value returned from text property handlers (see below). */ | |
516 | ||
517 | enum prop_handled | |
3c6595e0 | 518 | { |
5f5c8ee5 GM |
519 | HANDLED_NORMALLY, |
520 | HANDLED_RECOMPUTE_PROPS, | |
521 | HANDLED_OVERLAY_STRING_CONSUMED, | |
522 | HANDLED_RETURN | |
523 | }; | |
3c6595e0 | 524 | |
5f5c8ee5 GM |
525 | /* A description of text properties that redisplay is interested |
526 | in. */ | |
3c6595e0 | 527 | |
5f5c8ee5 GM |
528 | struct props |
529 | { | |
530 | /* The name of the property. */ | |
531 | Lisp_Object *name; | |
90adcf20 | 532 | |
5f5c8ee5 GM |
533 | /* A unique index for the property. */ |
534 | enum prop_idx idx; | |
535 | ||
536 | /* A handler function called to set up iterator IT from the property | |
537 | at IT's current position. Value is used to steer handle_stop. */ | |
538 | enum prop_handled (*handler) P_ ((struct it *it)); | |
539 | }; | |
540 | ||
541 | static enum prop_handled handle_face_prop P_ ((struct it *)); | |
542 | static enum prop_handled handle_invisible_prop P_ ((struct it *)); | |
543 | static enum prop_handled handle_display_prop P_ ((struct it *)); | |
260a86a0 | 544 | static enum prop_handled handle_composition_prop P_ ((struct it *)); |
5f5c8ee5 GM |
545 | static enum prop_handled handle_overlay_change P_ ((struct it *)); |
546 | static enum prop_handled handle_fontified_prop P_ ((struct it *)); | |
547 | ||
548 | /* Properties handled by iterators. */ | |
549 | ||
550 | static struct props it_props[] = | |
5992c4f7 | 551 | { |
5f5c8ee5 GM |
552 | {&Qfontified, FONTIFIED_PROP_IDX, handle_fontified_prop}, |
553 | /* Handle `face' before `display' because some sub-properties of | |
554 | `display' need to know the face. */ | |
555 | {&Qface, FACE_PROP_IDX, handle_face_prop}, | |
556 | {&Qdisplay, DISPLAY_PROP_IDX, handle_display_prop}, | |
557 | {&Qinvisible, INVISIBLE_PROP_IDX, handle_invisible_prop}, | |
260a86a0 | 558 | {&Qcomposition, COMPOSITION_PROP_IDX, handle_composition_prop}, |
5f5c8ee5 GM |
559 | {NULL, 0, NULL} |
560 | }; | |
5992c4f7 | 561 | |
5f5c8ee5 GM |
562 | /* Value is the position described by X. If X is a marker, value is |
563 | the marker_position of X. Otherwise, value is X. */ | |
12adba34 | 564 | |
5f5c8ee5 | 565 | #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X)) |
12adba34 | 566 | |
5f5c8ee5 | 567 | /* Enumeration returned by some move_it_.* functions internally. */ |
12adba34 | 568 | |
5f5c8ee5 GM |
569 | enum move_it_result |
570 | { | |
571 | /* Not used. Undefined value. */ | |
572 | MOVE_UNDEFINED, | |
bab29e15 | 573 | |
5f5c8ee5 GM |
574 | /* Move ended at the requested buffer position or ZV. */ |
575 | MOVE_POS_MATCH_OR_ZV, | |
bab29e15 | 576 | |
5f5c8ee5 GM |
577 | /* Move ended at the requested X pixel position. */ |
578 | MOVE_X_REACHED, | |
12adba34 | 579 | |
5f5c8ee5 GM |
580 | /* Move within a line ended at the end of a line that must be |
581 | continued. */ | |
582 | MOVE_LINE_CONTINUED, | |
583 | ||
584 | /* Move within a line ended at the end of a line that would | |
585 | be displayed truncated. */ | |
586 | MOVE_LINE_TRUNCATED, | |
ff6c30e5 | 587 | |
5f5c8ee5 GM |
588 | /* Move within a line ended at a line end. */ |
589 | MOVE_NEWLINE_OR_CR | |
590 | }; | |
12adba34 | 591 | |
ff6c30e5 | 592 | |
5f5c8ee5 GM |
593 | \f |
594 | /* Function prototypes. */ | |
595 | ||
5bcfeb49 | 596 | static void ensure_echo_area_buffers P_ ((void)); |
e037b9ec GM |
597 | static struct glyph_row *row_containing_pos P_ ((struct window *, int, |
598 | struct glyph_row *, | |
599 | struct glyph_row *)); | |
c6e89d6c GM |
600 | static Lisp_Object unwind_with_echo_area_buffer P_ ((Lisp_Object)); |
601 | static Lisp_Object with_echo_area_buffer_unwind_data P_ ((struct window *)); | |
c6e89d6c GM |
602 | static void clear_garbaged_frames P_ ((void)); |
603 | static int current_message_1 P_ ((Lisp_Object *)); | |
604 | static int truncate_message_1 P_ ((int)); | |
605 | static int set_message_1 P_ ((char *s, Lisp_Object, int, int)); | |
606 | static int display_echo_area P_ ((struct window *)); | |
607 | static int display_echo_area_1 P_ ((struct window *)); | |
28514cd9 | 608 | static Lisp_Object unwind_redisplay P_ ((Lisp_Object)); |
4fdb80f2 | 609 | static int string_char_and_length P_ ((unsigned char *, int, int *)); |
5f5c8ee5 GM |
610 | static struct text_pos display_prop_end P_ ((struct it *, Lisp_Object, |
611 | struct text_pos)); | |
612 | static int compute_window_start_on_continuation_line P_ ((struct window *)); | |
613 | static Lisp_Object eval_handler P_ ((Lisp_Object)); | |
614 | static Lisp_Object eval_form P_ ((Lisp_Object)); | |
615 | static void insert_left_trunc_glyphs P_ ((struct it *)); | |
616 | static struct glyph_row *get_overlay_arrow_glyph_row P_ ((struct window *)); | |
617 | static void extend_face_to_end_of_line P_ ((struct it *)); | |
80c6cb1f | 618 | static int append_space P_ ((struct it *, int)); |
5f5c8ee5 GM |
619 | static void make_cursor_line_fully_visible P_ ((struct window *)); |
620 | static int try_scrolling P_ ((Lisp_Object, int, int, int, int)); | |
621 | static int trailing_whitespace_p P_ ((int)); | |
622 | static int message_log_check_duplicate P_ ((int, int, int, int)); | |
623 | int invisible_p P_ ((Lisp_Object, Lisp_Object)); | |
624 | int invisible_ellipsis_p P_ ((Lisp_Object, Lisp_Object)); | |
625 | static void push_it P_ ((struct it *)); | |
626 | static void pop_it P_ ((struct it *)); | |
627 | static void sync_frame_with_window_matrix_rows P_ ((struct window *)); | |
628 | static void redisplay_internal P_ ((int)); | |
c6e89d6c | 629 | static int echo_area_display P_ ((int)); |
5f5c8ee5 GM |
630 | static void redisplay_windows P_ ((Lisp_Object)); |
631 | static void redisplay_window P_ ((Lisp_Object, int)); | |
632 | static void update_menu_bar P_ ((struct frame *, int)); | |
633 | static int try_window_reusing_current_matrix P_ ((struct window *)); | |
634 | static int try_window_id P_ ((struct window *)); | |
635 | static int display_line P_ ((struct it *)); | |
636 | static void display_mode_lines P_ ((struct window *)); | |
637 | static void display_mode_line P_ ((struct window *, enum face_id, | |
638 | Lisp_Object)); | |
639 | static int display_mode_element P_ ((struct it *, int, int, int, Lisp_Object)); | |
68c45bf0 | 640 | static char *decode_mode_spec P_ ((struct window *, int, int, int)); |
5f5c8ee5 GM |
641 | static void display_menu_bar P_ ((struct window *)); |
642 | static int display_count_lines P_ ((int, int, int, int, int *)); | |
643 | static int display_string P_ ((unsigned char *, Lisp_Object, Lisp_Object, | |
644 | int, int, struct it *, int, int, int, int)); | |
645 | static void compute_line_metrics P_ ((struct it *)); | |
646 | static void run_redisplay_end_trigger_hook P_ ((struct it *)); | |
647 | static int get_overlay_strings P_ ((struct it *)); | |
648 | static void next_overlay_string P_ ((struct it *)); | |
649 | void set_iterator_to_next P_ ((struct it *)); | |
650 | static void reseat P_ ((struct it *, struct text_pos, int)); | |
651 | static void reseat_1 P_ ((struct it *, struct text_pos, int)); | |
652 | static void back_to_previous_visible_line_start P_ ((struct it *)); | |
653 | static void reseat_at_previous_visible_line_start P_ ((struct it *)); | |
312246d1 | 654 | static void reseat_at_next_visible_line_start P_ ((struct it *, int)); |
5f5c8ee5 GM |
655 | static int next_element_from_display_vector P_ ((struct it *)); |
656 | static int next_element_from_string P_ ((struct it *)); | |
657 | static int next_element_from_c_string P_ ((struct it *)); | |
658 | static int next_element_from_buffer P_ ((struct it *)); | |
260a86a0 | 659 | static int next_element_from_composition P_ ((struct it *)); |
5f5c8ee5 GM |
660 | static int next_element_from_image P_ ((struct it *)); |
661 | static int next_element_from_stretch P_ ((struct it *)); | |
662 | static void load_overlay_strings P_ ((struct it *)); | |
663 | static void init_from_display_pos P_ ((struct it *, struct window *, | |
664 | struct display_pos *)); | |
665 | static void reseat_to_string P_ ((struct it *, unsigned char *, | |
666 | Lisp_Object, int, int, int, int)); | |
667 | static int charset_at_position P_ ((struct text_pos)); | |
668 | static enum move_it_result move_it_in_display_line_to P_ ((struct it *, | |
669 | int, int, int)); | |
670 | void move_it_vertically_backward P_ ((struct it *, int)); | |
671 | static void init_to_row_start P_ ((struct it *, struct window *, | |
672 | struct glyph_row *)); | |
673 | static void init_to_row_end P_ ((struct it *, struct window *, | |
674 | struct glyph_row *)); | |
675 | static void back_to_previous_line_start P_ ((struct it *)); | |
676 | static void forward_to_next_line_start P_ ((struct it *)); | |
677 | static struct text_pos string_pos_nchars_ahead P_ ((struct text_pos, | |
678 | Lisp_Object, int)); | |
679 | static struct text_pos string_pos P_ ((int, Lisp_Object)); | |
680 | static struct text_pos c_string_pos P_ ((int, unsigned char *, int)); | |
681 | static int number_of_chars P_ ((unsigned char *, int)); | |
682 | static void compute_stop_pos P_ ((struct it *)); | |
683 | static void compute_string_pos P_ ((struct text_pos *, struct text_pos, | |
684 | Lisp_Object)); | |
685 | static int face_before_or_after_it_pos P_ ((struct it *, int)); | |
686 | static int next_overlay_change P_ ((int)); | |
687 | static int handle_single_display_prop P_ ((struct it *, Lisp_Object, | |
688 | Lisp_Object, struct text_pos *)); | |
689 | ||
690 | #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1) | |
691 | #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0) | |
ff6c30e5 | 692 | |
5f5c8ee5 | 693 | #ifdef HAVE_WINDOW_SYSTEM |
12adba34 | 694 | |
e037b9ec GM |
695 | static void update_tool_bar P_ ((struct frame *, int)); |
696 | static void build_desired_tool_bar_string P_ ((struct frame *f)); | |
697 | static int redisplay_tool_bar P_ ((struct frame *)); | |
698 | static void display_tool_bar_line P_ ((struct it *)); | |
12adba34 | 699 | |
5f5c8ee5 | 700 | #endif /* HAVE_WINDOW_SYSTEM */ |
12adba34 | 701 | |
5f5c8ee5 GM |
702 | \f |
703 | /*********************************************************************** | |
704 | Window display dimensions | |
705 | ***********************************************************************/ | |
12adba34 | 706 | |
5f5c8ee5 GM |
707 | /* Return the window-relative maximum y + 1 for glyph rows displaying |
708 | text in window W. This is the height of W minus the height of a | |
709 | mode line, if any. */ | |
710 | ||
711 | INLINE int | |
712 | window_text_bottom_y (w) | |
713 | struct window *w; | |
714 | { | |
715 | struct frame *f = XFRAME (w->frame); | |
716 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
717 | ||
718 | if (WINDOW_WANTS_MODELINE_P (w)) | |
719 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
720 | return height; | |
f88eb0b6 KH |
721 | } |
722 | ||
f82aff7c | 723 | |
5f5c8ee5 GM |
724 | /* Return the pixel width of display area AREA of window W. AREA < 0 |
725 | means return the total width of W, not including bitmap areas to | |
726 | the left and right of the window. */ | |
ff6c30e5 | 727 | |
5f5c8ee5 GM |
728 | INLINE int |
729 | window_box_width (w, area) | |
730 | struct window *w; | |
731 | int area; | |
732 | { | |
733 | struct frame *f = XFRAME (w->frame); | |
734 | int width = XFASTINT (w->width); | |
735 | ||
736 | if (!w->pseudo_window_p) | |
ff6c30e5 | 737 | { |
050d82d7 | 738 | width -= FRAME_SCROLL_BAR_WIDTH (f) + FRAME_FLAGS_AREA_COLS (f); |
5f5c8ee5 GM |
739 | |
740 | if (area == TEXT_AREA) | |
741 | { | |
742 | if (INTEGERP (w->left_margin_width)) | |
743 | width -= XFASTINT (w->left_margin_width); | |
744 | if (INTEGERP (w->right_margin_width)) | |
745 | width -= XFASTINT (w->right_margin_width); | |
746 | } | |
747 | else if (area == LEFT_MARGIN_AREA) | |
748 | width = (INTEGERP (w->left_margin_width) | |
749 | ? XFASTINT (w->left_margin_width) : 0); | |
750 | else if (area == RIGHT_MARGIN_AREA) | |
751 | width = (INTEGERP (w->right_margin_width) | |
752 | ? XFASTINT (w->right_margin_width) : 0); | |
ff6c30e5 | 753 | } |
5f5c8ee5 GM |
754 | |
755 | return width * CANON_X_UNIT (f); | |
ff6c30e5 | 756 | } |
1adc55de | 757 | |
1adc55de | 758 | |
5f5c8ee5 GM |
759 | /* Return the pixel height of the display area of window W, not |
760 | including mode lines of W, if any.. */ | |
f88eb0b6 | 761 | |
5f5c8ee5 GM |
762 | INLINE int |
763 | window_box_height (w) | |
764 | struct window *w; | |
f88eb0b6 | 765 | { |
5f5c8ee5 GM |
766 | struct frame *f = XFRAME (w->frame); |
767 | int height = XFASTINT (w->height) * CANON_Y_UNIT (f); | |
768 | ||
769 | if (WINDOW_WANTS_MODELINE_P (w)) | |
770 | height -= CURRENT_MODE_LINE_HEIGHT (w); | |
771 | ||
045dee35 GM |
772 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
773 | height -= CURRENT_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
774 | |
775 | return height; | |
5992c4f7 KH |
776 | } |
777 | ||
778 | ||
5f5c8ee5 GM |
779 | /* Return the frame-relative coordinate of the left edge of display |
780 | area AREA of window W. AREA < 0 means return the left edge of the | |
781 | whole window, to the right of any bitmap area at the left side of | |
782 | W. */ | |
5992c4f7 | 783 | |
5f5c8ee5 GM |
784 | INLINE int |
785 | window_box_left (w, area) | |
786 | struct window *w; | |
787 | int area; | |
90adcf20 | 788 | { |
5f5c8ee5 GM |
789 | struct frame *f = XFRAME (w->frame); |
790 | int x = FRAME_INTERNAL_BORDER_WIDTH_SAFE (f); | |
a3788d53 | 791 | |
5f5c8ee5 | 792 | if (!w->pseudo_window_p) |
90adcf20 | 793 | { |
5f5c8ee5 | 794 | x += (WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f) |
050d82d7 | 795 | + FRAME_LEFT_FLAGS_AREA_WIDTH (f)); |
5f5c8ee5 GM |
796 | |
797 | if (area == TEXT_AREA) | |
798 | x += window_box_width (w, LEFT_MARGIN_AREA); | |
799 | else if (area == RIGHT_MARGIN_AREA) | |
800 | x += (window_box_width (w, LEFT_MARGIN_AREA) | |
801 | + window_box_width (w, TEXT_AREA)); | |
90adcf20 | 802 | } |
73af359d | 803 | |
5f5c8ee5 GM |
804 | return x; |
805 | } | |
90adcf20 | 806 | |
b6436d4e | 807 | |
5f5c8ee5 GM |
808 | /* Return the frame-relative coordinate of the right edge of display |
809 | area AREA of window W. AREA < 0 means return the left edge of the | |
810 | whole window, to the left of any bitmap area at the right side of | |
811 | W. */ | |
ded34426 | 812 | |
5f5c8ee5 GM |
813 | INLINE int |
814 | window_box_right (w, area) | |
815 | struct window *w; | |
816 | int area; | |
817 | { | |
818 | return window_box_left (w, area) + window_box_width (w, area); | |
819 | } | |
820 | ||
821 | ||
822 | /* Get the bounding box of the display area AREA of window W, without | |
823 | mode lines, in frame-relative coordinates. AREA < 0 means the | |
824 | whole window, not including bitmap areas to the left and right of | |
825 | the window. Return in *BOX_X and *BOX_Y the frame-relative pixel | |
826 | coordinates of the upper-left corner of the box. Return in | |
827 | *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */ | |
828 | ||
829 | INLINE void | |
830 | window_box (w, area, box_x, box_y, box_width, box_height) | |
831 | struct window *w; | |
832 | int area; | |
833 | int *box_x, *box_y, *box_width, *box_height; | |
834 | { | |
835 | struct frame *f = XFRAME (w->frame); | |
836 | ||
837 | *box_width = window_box_width (w, area); | |
838 | *box_height = window_box_height (w); | |
839 | *box_x = window_box_left (w, area); | |
840 | *box_y = (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f) | |
841 | + XFASTINT (w->top) * CANON_Y_UNIT (f)); | |
045dee35 GM |
842 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
843 | *box_y += CURRENT_HEADER_LINE_HEIGHT (w); | |
ded34426 | 844 | } |
1adc55de | 845 | |
1adc55de | 846 | |
5f5c8ee5 GM |
847 | /* Get the bounding box of the display area AREA of window W, without |
848 | mode lines. AREA < 0 means the whole window, not including bitmap | |
849 | areas to the left and right of the window. Return in *TOP_LEFT_X | |
850 | and TOP_LEFT_Y the frame-relative pixel coordinates of the | |
851 | upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and | |
852 | *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the | |
853 | box. */ | |
ded34426 | 854 | |
5f5c8ee5 GM |
855 | INLINE void |
856 | window_box_edges (w, area, top_left_x, top_left_y, | |
857 | bottom_right_x, bottom_right_y) | |
858 | struct window *w; | |
859 | int area; | |
860 | int *top_left_x, *top_left_y, *bottom_right_x, *bottom_right_y; | |
48ae5f0a | 861 | { |
5f5c8ee5 GM |
862 | window_box (w, area, top_left_x, top_left_y, bottom_right_x, |
863 | bottom_right_y); | |
864 | *bottom_right_x += *top_left_x; | |
865 | *bottom_right_y += *top_left_y; | |
48ae5f0a KH |
866 | } |
867 | ||
5f5c8ee5 GM |
868 | |
869 | \f | |
870 | /*********************************************************************** | |
871 | Utilities | |
872 | ***********************************************************************/ | |
873 | ||
4fdb80f2 GM |
874 | /* Return the next character from STR which is MAXLEN bytes long. |
875 | Return in *LEN the length of the character. This is like | |
876 | STRING_CHAR_AND_LENGTH but never returns an invalid character. If | |
877 | we find one, we return a `?', but with the length of the illegal | |
878 | character. */ | |
879 | ||
880 | static INLINE int | |
7a5b8a93 | 881 | string_char_and_length (str, maxlen, len) |
4fdb80f2 | 882 | unsigned char *str; |
7a5b8a93 | 883 | int maxlen, *len; |
4fdb80f2 GM |
884 | { |
885 | int c; | |
886 | ||
887 | c = STRING_CHAR_AND_LENGTH (str, maxlen, *len); | |
888 | if (!CHAR_VALID_P (c, 1)) | |
889 | /* We may not change the length here because other places in Emacs | |
890 | don't use this function, i.e. they silently accept illegal | |
891 | characters. */ | |
892 | c = '?'; | |
893 | ||
894 | return c; | |
895 | } | |
896 | ||
897 | ||
898 | ||
5f5c8ee5 GM |
899 | /* Given a position POS containing a valid character and byte position |
900 | in STRING, return the position NCHARS ahead (NCHARS >= 0). */ | |
901 | ||
902 | static struct text_pos | |
903 | string_pos_nchars_ahead (pos, string, nchars) | |
904 | struct text_pos pos; | |
905 | Lisp_Object string; | |
906 | int nchars; | |
0b1005ef | 907 | { |
5f5c8ee5 GM |
908 | xassert (STRINGP (string) && nchars >= 0); |
909 | ||
910 | if (STRING_MULTIBYTE (string)) | |
911 | { | |
912 | int rest = STRING_BYTES (XSTRING (string)) - BYTEPOS (pos); | |
913 | unsigned char *p = XSTRING (string)->data + BYTEPOS (pos); | |
914 | int len; | |
915 | ||
916 | while (nchars--) | |
917 | { | |
4fdb80f2 | 918 | string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
919 | p += len, rest -= len; |
920 | xassert (rest >= 0); | |
921 | CHARPOS (pos) += 1; | |
922 | BYTEPOS (pos) += len; | |
923 | } | |
924 | } | |
925 | else | |
926 | SET_TEXT_POS (pos, CHARPOS (pos) + nchars, BYTEPOS (pos) + nchars); | |
927 | ||
928 | return pos; | |
0a9dc68b RS |
929 | } |
930 | ||
0a9dc68b | 931 | |
5f5c8ee5 GM |
932 | /* Value is the text position, i.e. character and byte position, |
933 | for character position CHARPOS in STRING. */ | |
934 | ||
935 | static INLINE struct text_pos | |
936 | string_pos (charpos, string) | |
937 | int charpos; | |
0a9dc68b | 938 | Lisp_Object string; |
0a9dc68b | 939 | { |
5f5c8ee5 GM |
940 | struct text_pos pos; |
941 | xassert (STRINGP (string)); | |
942 | xassert (charpos >= 0); | |
943 | SET_TEXT_POS (pos, charpos, string_char_to_byte (string, charpos)); | |
944 | return pos; | |
945 | } | |
946 | ||
947 | ||
948 | /* Value is a text position, i.e. character and byte position, for | |
949 | character position CHARPOS in C string S. MULTIBYTE_P non-zero | |
950 | means recognize multibyte characters. */ | |
951 | ||
952 | static struct text_pos | |
953 | c_string_pos (charpos, s, multibyte_p) | |
954 | int charpos; | |
955 | unsigned char *s; | |
956 | int multibyte_p; | |
957 | { | |
958 | struct text_pos pos; | |
959 | ||
960 | xassert (s != NULL); | |
961 | xassert (charpos >= 0); | |
962 | ||
963 | if (multibyte_p) | |
0a9dc68b | 964 | { |
5f5c8ee5 GM |
965 | int rest = strlen (s), len; |
966 | ||
967 | SET_TEXT_POS (pos, 0, 0); | |
968 | while (charpos--) | |
0a9dc68b | 969 | { |
4fdb80f2 | 970 | string_char_and_length (s, rest, &len); |
5f5c8ee5 GM |
971 | s += len, rest -= len; |
972 | xassert (rest >= 0); | |
973 | CHARPOS (pos) += 1; | |
974 | BYTEPOS (pos) += len; | |
0a9dc68b RS |
975 | } |
976 | } | |
5f5c8ee5 GM |
977 | else |
978 | SET_TEXT_POS (pos, charpos, charpos); | |
0a9dc68b | 979 | |
5f5c8ee5 GM |
980 | return pos; |
981 | } | |
0a9dc68b | 982 | |
0a9dc68b | 983 | |
5f5c8ee5 GM |
984 | /* Value is the number of characters in C string S. MULTIBYTE_P |
985 | non-zero means recognize multibyte characters. */ | |
0a9dc68b | 986 | |
5f5c8ee5 GM |
987 | static int |
988 | number_of_chars (s, multibyte_p) | |
989 | unsigned char *s; | |
990 | int multibyte_p; | |
991 | { | |
992 | int nchars; | |
993 | ||
994 | if (multibyte_p) | |
995 | { | |
996 | int rest = strlen (s), len; | |
997 | unsigned char *p = (unsigned char *) s; | |
0a9dc68b | 998 | |
5f5c8ee5 GM |
999 | for (nchars = 0; rest > 0; ++nchars) |
1000 | { | |
4fdb80f2 | 1001 | string_char_and_length (p, rest, &len); |
5f5c8ee5 | 1002 | rest -= len, p += len; |
0a9dc68b RS |
1003 | } |
1004 | } | |
5f5c8ee5 GM |
1005 | else |
1006 | nchars = strlen (s); | |
1007 | ||
1008 | return nchars; | |
0b1005ef KH |
1009 | } |
1010 | ||
5f5c8ee5 GM |
1011 | |
1012 | /* Compute byte position NEWPOS->bytepos corresponding to | |
1013 | NEWPOS->charpos. POS is a known position in string STRING. | |
1014 | NEWPOS->charpos must be >= POS.charpos. */ | |
76412d64 | 1015 | |
5f5c8ee5 GM |
1016 | static void |
1017 | compute_string_pos (newpos, pos, string) | |
1018 | struct text_pos *newpos, pos; | |
1019 | Lisp_Object string; | |
76412d64 | 1020 | { |
5f5c8ee5 GM |
1021 | xassert (STRINGP (string)); |
1022 | xassert (CHARPOS (*newpos) >= CHARPOS (pos)); | |
1023 | ||
1024 | if (STRING_MULTIBYTE (string)) | |
1025 | *newpos = string_pos_nchars_ahead (pos, CHARPOS (*newpos) - CHARPOS (pos), | |
1026 | string); | |
1027 | else | |
1028 | BYTEPOS (*newpos) = CHARPOS (*newpos); | |
76412d64 RS |
1029 | } |
1030 | ||
9c74a0dd | 1031 | |
5f5c8ee5 GM |
1032 | /* Return the charset of the character at position POS in |
1033 | current_buffer. */ | |
1adc55de | 1034 | |
5f5c8ee5 GM |
1035 | static int |
1036 | charset_at_position (pos) | |
1037 | struct text_pos pos; | |
a2889657 | 1038 | { |
5f5c8ee5 GM |
1039 | int c, multibyte_p; |
1040 | unsigned char *p = BYTE_POS_ADDR (BYTEPOS (pos)); | |
1041 | ||
1042 | multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1043 | if (multibyte_p) | |
a2889657 | 1044 | { |
5f5c8ee5 GM |
1045 | int maxlen = ((BYTEPOS (pos) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) |
1046 | - BYTEPOS (pos)); | |
1047 | int len; | |
4fdb80f2 | 1048 | c = string_char_and_length (p, maxlen, &len); |
a2889657 | 1049 | } |
5f5c8ee5 GM |
1050 | else |
1051 | c = *p; | |
1052 | ||
1053 | return CHAR_CHARSET (c); | |
1054 | } | |
1055 | ||
1056 | ||
1057 | \f | |
1058 | /*********************************************************************** | |
1059 | Lisp form evaluation | |
1060 | ***********************************************************************/ | |
1061 | ||
1062 | /* Error handler for eval_form. */ | |
1063 | ||
1064 | static Lisp_Object | |
1065 | eval_handler (arg) | |
1066 | Lisp_Object arg; | |
1067 | { | |
1068 | return Qnil; | |
1069 | } | |
1070 | ||
1071 | ||
1072 | /* Evaluate SEXPR and return the result, or nil if something went | |
1073 | wrong. */ | |
1074 | ||
1075 | static Lisp_Object | |
1076 | eval_form (sexpr) | |
1077 | Lisp_Object sexpr; | |
1078 | { | |
1079 | int count = specpdl_ptr - specpdl; | |
1080 | Lisp_Object val; | |
1081 | specbind (Qinhibit_redisplay, Qt); | |
1082 | val = internal_condition_case_1 (Feval, sexpr, Qerror, eval_handler); | |
1083 | return unbind_to (count, val); | |
1084 | } | |
1085 | ||
1086 | ||
1087 | \f | |
1088 | /*********************************************************************** | |
1089 | Debugging | |
1090 | ***********************************************************************/ | |
1091 | ||
1092 | #if 0 | |
1093 | ||
1094 | /* Define CHECK_IT to perform sanity checks on iterators. | |
1095 | This is for debugging. It is too slow to do unconditionally. */ | |
1096 | ||
1097 | static void | |
1098 | check_it (it) | |
1099 | struct it *it; | |
1100 | { | |
1101 | if (it->method == next_element_from_string) | |
a2889657 | 1102 | { |
5f5c8ee5 GM |
1103 | xassert (STRINGP (it->string)); |
1104 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
1105 | } | |
1106 | else if (it->method == next_element_from_buffer) | |
1107 | { | |
1108 | /* Check that character and byte positions agree. */ | |
1109 | xassert (IT_CHARPOS (*it) == BYTE_TO_CHAR (IT_BYTEPOS (*it))); | |
1110 | } | |
73af359d | 1111 | |
5f5c8ee5 GM |
1112 | if (it->dpvec) |
1113 | xassert (it->current.dpvec_index >= 0); | |
1114 | else | |
1115 | xassert (it->current.dpvec_index < 0); | |
1116 | } | |
1f40cad2 | 1117 | |
5f5c8ee5 GM |
1118 | #define CHECK_IT(IT) check_it ((IT)) |
1119 | ||
1120 | #else /* not 0 */ | |
1121 | ||
1122 | #define CHECK_IT(IT) (void) 0 | |
1123 | ||
1124 | #endif /* not 0 */ | |
1125 | ||
1126 | ||
1127 | #if GLYPH_DEBUG | |
1128 | ||
1129 | /* Check that the window end of window W is what we expect it | |
1130 | to be---the last row in the current matrix displaying text. */ | |
1131 | ||
1132 | static void | |
1133 | check_window_end (w) | |
1134 | struct window *w; | |
1135 | { | |
1136 | if (!MINI_WINDOW_P (w) | |
1137 | && !NILP (w->window_end_valid)) | |
1138 | { | |
1139 | struct glyph_row *row; | |
1140 | xassert ((row = MATRIX_ROW (w->current_matrix, | |
1141 | XFASTINT (w->window_end_vpos)), | |
1142 | !row->enabled_p | |
1143 | || MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
1144 | || MATRIX_ROW_VPOS (row, w->current_matrix) == 0)); | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | #define CHECK_WINDOW_END(W) check_window_end ((W)) | |
1149 | ||
1150 | #else /* not GLYPH_DEBUG */ | |
1151 | ||
1152 | #define CHECK_WINDOW_END(W) (void) 0 | |
1153 | ||
1154 | #endif /* not GLYPH_DEBUG */ | |
1155 | ||
1156 | ||
1157 | \f | |
1158 | /*********************************************************************** | |
1159 | Iterator initialization | |
1160 | ***********************************************************************/ | |
1161 | ||
1162 | /* Initialize IT for displaying current_buffer in window W, starting | |
1163 | at character position CHARPOS. CHARPOS < 0 means that no buffer | |
1164 | position is specified which is useful when the iterator is assigned | |
1165 | a position later. BYTEPOS is the byte position corresponding to | |
1166 | CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS. | |
1167 | ||
1168 | If ROW is not null, calls to produce_glyphs with IT as parameter | |
1169 | will produce glyphs in that row. | |
1170 | ||
1171 | BASE_FACE_ID is the id of a base face to use. It must be one of | |
1172 | DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or | |
045dee35 | 1173 | HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for |
e037b9ec | 1174 | displaying the tool-bar. |
5f5c8ee5 GM |
1175 | |
1176 | If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or | |
045dee35 | 1177 | HEADER_LINE_FACE_ID, the iterator will be initialized to use the |
5f5c8ee5 GM |
1178 | corresponding mode line glyph row of the desired matrix of W. */ |
1179 | ||
1180 | void | |
1181 | init_iterator (it, w, charpos, bytepos, row, base_face_id) | |
1182 | struct it *it; | |
1183 | struct window *w; | |
1184 | int charpos, bytepos; | |
1185 | struct glyph_row *row; | |
1186 | enum face_id base_face_id; | |
1187 | { | |
1188 | int highlight_region_p; | |
5f5c8ee5 GM |
1189 | |
1190 | /* Some precondition checks. */ | |
1191 | xassert (w != NULL && it != NULL); | |
5f5c8ee5 GM |
1192 | xassert (charpos < 0 || (charpos > 0 && charpos <= ZV)); |
1193 | ||
1194 | /* If face attributes have been changed since the last redisplay, | |
1195 | free realized faces now because they depend on face definitions | |
1196 | that might have changed. */ | |
1197 | if (face_change_count) | |
1198 | { | |
1199 | face_change_count = 0; | |
1200 | free_all_realized_faces (Qnil); | |
1201 | } | |
1202 | ||
1203 | /* Use one of the mode line rows of W's desired matrix if | |
1204 | appropriate. */ | |
1205 | if (row == NULL) | |
1206 | { | |
1207 | if (base_face_id == MODE_LINE_FACE_ID) | |
1208 | row = MATRIX_MODE_LINE_ROW (w->desired_matrix); | |
045dee35 GM |
1209 | else if (base_face_id == HEADER_LINE_FACE_ID) |
1210 | row = MATRIX_HEADER_LINE_ROW (w->desired_matrix); | |
5f5c8ee5 GM |
1211 | } |
1212 | ||
1213 | /* Clear IT. */ | |
1214 | bzero (it, sizeof *it); | |
1215 | it->current.overlay_string_index = -1; | |
1216 | it->current.dpvec_index = -1; | |
1217 | it->charset = CHARSET_ASCII; | |
1218 | it->base_face_id = base_face_id; | |
1219 | ||
1220 | /* The window in which we iterate over current_buffer: */ | |
1221 | XSETWINDOW (it->window, w); | |
1222 | it->w = w; | |
1223 | it->f = XFRAME (w->frame); | |
1224 | ||
1225 | /* If realized faces have been removed, e.g. because of face | |
1226 | attribute changes of named faces, recompute them. */ | |
1227 | if (FRAME_FACE_CACHE (it->f)->used == 0) | |
1228 | recompute_basic_faces (it->f); | |
1229 | ||
5f5c8ee5 GM |
1230 | /* Current value of the `space-width', and 'height' properties. */ |
1231 | it->space_width = Qnil; | |
1232 | it->font_height = Qnil; | |
1233 | ||
1234 | /* Are control characters displayed as `^C'? */ | |
1235 | it->ctl_arrow_p = !NILP (current_buffer->ctl_arrow); | |
1236 | ||
1237 | /* -1 means everything between a CR and the following line end | |
1238 | is invisible. >0 means lines indented more than this value are | |
1239 | invisible. */ | |
1240 | it->selective = (INTEGERP (current_buffer->selective_display) | |
1241 | ? XFASTINT (current_buffer->selective_display) | |
1242 | : (!NILP (current_buffer->selective_display) | |
1243 | ? -1 : 0)); | |
1244 | it->selective_display_ellipsis_p | |
1245 | = !NILP (current_buffer->selective_display_ellipses); | |
1246 | ||
1247 | /* Display table to use. */ | |
1248 | it->dp = window_display_table (w); | |
1249 | ||
1250 | /* Are multibyte characters enabled in current_buffer? */ | |
1251 | it->multibyte_p = !NILP (current_buffer->enable_multibyte_characters); | |
1252 | ||
1253 | /* Non-zero if we should highlight the region. */ | |
1254 | highlight_region_p | |
1255 | = (!NILP (Vtransient_mark_mode) | |
1256 | && !NILP (current_buffer->mark_active) | |
1257 | && XMARKER (current_buffer->mark)->buffer != 0); | |
1258 | ||
1259 | /* Set IT->region_beg_charpos and IT->region_end_charpos to the | |
1260 | start and end of a visible region in window IT->w. Set both to | |
1261 | -1 to indicate no region. */ | |
1262 | if (highlight_region_p | |
1263 | /* Maybe highlight only in selected window. */ | |
1264 | && (/* Either show region everywhere. */ | |
1265 | highlight_nonselected_windows | |
1266 | /* Or show region in the selected window. */ | |
1267 | || w == XWINDOW (selected_window) | |
1268 | /* Or show the region if we are in the mini-buffer and W is | |
1269 | the window the mini-buffer refers to. */ | |
1270 | || (MINI_WINDOW_P (XWINDOW (selected_window)) | |
1271 | && w == XWINDOW (Vminibuf_scroll_window)))) | |
1272 | { | |
1273 | int charpos = marker_position (current_buffer->mark); | |
1274 | it->region_beg_charpos = min (PT, charpos); | |
1275 | it->region_end_charpos = max (PT, charpos); | |
1276 | } | |
1277 | else | |
1278 | it->region_beg_charpos = it->region_end_charpos = -1; | |
1279 | ||
1280 | /* Get the position at which the redisplay_end_trigger hook should | |
1281 | be run, if it is to be run at all. */ | |
1282 | if (MARKERP (w->redisplay_end_trigger) | |
1283 | && XMARKER (w->redisplay_end_trigger)->buffer != 0) | |
1284 | it->redisplay_end_trigger_charpos | |
1285 | = marker_position (w->redisplay_end_trigger); | |
1286 | else if (INTEGERP (w->redisplay_end_trigger)) | |
1287 | it->redisplay_end_trigger_charpos = XINT (w->redisplay_end_trigger); | |
1288 | ||
1289 | /* Correct bogus values of tab_width. */ | |
1290 | it->tab_width = XINT (current_buffer->tab_width); | |
1291 | if (it->tab_width <= 0 || it->tab_width > 1000) | |
1292 | it->tab_width = 8; | |
1293 | ||
1294 | /* Are lines in the display truncated? */ | |
1295 | it->truncate_lines_p | |
1296 | = (base_face_id != DEFAULT_FACE_ID | |
1297 | || XINT (it->w->hscroll) | |
1298 | || (truncate_partial_width_windows | |
1299 | && !WINDOW_FULL_WIDTH_P (it->w)) | |
1300 | || !NILP (current_buffer->truncate_lines)); | |
1301 | ||
1302 | /* Get dimensions of truncation and continuation glyphs. These are | |
1303 | displayed as bitmaps under X, so we don't need them for such | |
1304 | frames. */ | |
1305 | if (!FRAME_WINDOW_P (it->f)) | |
1306 | { | |
1307 | if (it->truncate_lines_p) | |
1308 | { | |
1309 | /* We will need the truncation glyph. */ | |
1310 | xassert (it->glyph_row == NULL); | |
1311 | produce_special_glyphs (it, IT_TRUNCATION); | |
1312 | it->truncation_pixel_width = it->pixel_width; | |
1313 | } | |
1314 | else | |
1315 | { | |
1316 | /* We will need the continuation glyph. */ | |
1317 | xassert (it->glyph_row == NULL); | |
1318 | produce_special_glyphs (it, IT_CONTINUATION); | |
1319 | it->continuation_pixel_width = it->pixel_width; | |
1320 | } | |
1321 | ||
1322 | /* Reset these values to zero becaue the produce_special_glyphs | |
1323 | above has changed them. */ | |
1324 | it->pixel_width = it->ascent = it->descent = 0; | |
312246d1 | 1325 | it->phys_ascent = it->phys_descent = 0; |
5f5c8ee5 GM |
1326 | } |
1327 | ||
1328 | /* Set this after getting the dimensions of truncation and | |
1329 | continuation glyphs, so that we don't produce glyphs when calling | |
1330 | produce_special_glyphs, above. */ | |
1331 | it->glyph_row = row; | |
1332 | it->area = TEXT_AREA; | |
1333 | ||
1334 | /* Get the dimensions of the display area. The display area | |
1335 | consists of the visible window area plus a horizontally scrolled | |
1336 | part to the left of the window. All x-values are relative to the | |
1337 | start of this total display area. */ | |
1338 | if (base_face_id != DEFAULT_FACE_ID) | |
1339 | { | |
1340 | /* Mode lines, menu bar in terminal frames. */ | |
1341 | it->first_visible_x = 0; | |
1342 | it->last_visible_x = XFASTINT (w->width) * CANON_X_UNIT (it->f); | |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | it->first_visible_x | |
1347 | = XFASTINT (it->w->hscroll) * CANON_X_UNIT (it->f); | |
1348 | it->last_visible_x = (it->first_visible_x | |
1349 | + window_box_width (w, TEXT_AREA)); | |
1350 | ||
1351 | /* If we truncate lines, leave room for the truncator glyph(s) at | |
1352 | the right margin. Otherwise, leave room for the continuation | |
1353 | glyph(s). Truncation and continuation glyphs are not inserted | |
1354 | for window-based redisplay. */ | |
1355 | if (!FRAME_WINDOW_P (it->f)) | |
1356 | { | |
1357 | if (it->truncate_lines_p) | |
1358 | it->last_visible_x -= it->truncation_pixel_width; | |
1359 | else | |
1360 | it->last_visible_x -= it->continuation_pixel_width; | |
1361 | } | |
1362 | ||
045dee35 GM |
1363 | it->header_line_p = WINDOW_WANTS_HEADER_LINE_P (w); |
1364 | it->current_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w) + w->vscroll; | |
5f5c8ee5 GM |
1365 | } |
1366 | ||
1367 | /* Leave room for a border glyph. */ | |
1368 | if (!FRAME_WINDOW_P (it->f) | |
1369 | && !WINDOW_RIGHTMOST_P (it->w)) | |
1370 | it->last_visible_x -= 1; | |
1371 | ||
1372 | it->last_visible_y = window_text_bottom_y (w); | |
1373 | ||
1374 | /* For mode lines and alike, arrange for the first glyph having a | |
1375 | left box line if the face specifies a box. */ | |
1376 | if (base_face_id != DEFAULT_FACE_ID) | |
1377 | { | |
1378 | struct face *face; | |
1379 | ||
1380 | it->face_id = base_face_id; | |
1381 | ||
1382 | /* If we have a boxed mode line, make the first character appear | |
1383 | with a left box line. */ | |
1384 | face = FACE_FROM_ID (it->f, base_face_id); | |
1385 | if (face->box != FACE_NO_BOX) | |
1386 | it->start_of_box_run_p = 1; | |
1387 | } | |
1388 | ||
1389 | /* If a buffer position was specified, set the iterator there, | |
1390 | getting overlays and face properties from that position. */ | |
1391 | if (charpos > 0) | |
1392 | { | |
1393 | it->end_charpos = ZV; | |
1394 | it->face_id = -1; | |
1395 | IT_CHARPOS (*it) = charpos; | |
1396 | ||
1397 | /* Compute byte position if not specified. */ | |
1398 | if (bytepos <= 0) | |
1399 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (charpos); | |
1400 | else | |
1401 | IT_BYTEPOS (*it) = bytepos; | |
1402 | ||
1403 | /* Compute faces etc. */ | |
1404 | reseat (it, it->current.pos, 1); | |
1405 | } | |
1406 | ||
1407 | CHECK_IT (it); | |
1408 | } | |
1409 | ||
1410 | ||
1411 | /* Initialize IT for the display of window W with window start POS. */ | |
1412 | ||
1413 | void | |
1414 | start_display (it, w, pos) | |
1415 | struct it *it; | |
1416 | struct window *w; | |
1417 | struct text_pos pos; | |
1418 | { | |
1419 | int start_at_line_beg_p; | |
1420 | struct glyph_row *row; | |
045dee35 | 1421 | int first_vpos = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
1422 | int first_y; |
1423 | ||
1424 | row = w->desired_matrix->rows + first_vpos; | |
1425 | init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); | |
1426 | first_y = it->current_y; | |
1427 | ||
1428 | /* If window start is not at a line start, move back to the line | |
1429 | start. This makes sure that we take continuation lines into | |
1430 | account. */ | |
1431 | start_at_line_beg_p = (CHARPOS (pos) == BEGV | |
1432 | || FETCH_BYTE (BYTEPOS (pos) - 1) == '\n'); | |
1433 | if (!start_at_line_beg_p) | |
1434 | reseat_at_previous_visible_line_start (it); | |
1435 | ||
5f5c8ee5 GM |
1436 | /* If window start is not at a line start, skip forward to POS to |
1437 | get the correct continuation_lines_width and current_x. */ | |
1438 | if (!start_at_line_beg_p) | |
1439 | { | |
1440 | move_it_to (it, CHARPOS (pos), -1, -1, -1, MOVE_TO_POS); | |
1441 | ||
1442 | /* If lines are continued, this line may end in the middle of a | |
1443 | multi-glyph character (e.g. a control character displayed as | |
1444 | \003, or in the middle of an overlay string). In this case | |
1445 | move_it_to above will not have taken us to the start of | |
1446 | the continuation line but to the end of the continued line. */ | |
1447 | if (!it->truncate_lines_p && it->current_x > 0) | |
1448 | { | |
1449 | if (it->current.dpvec_index >= 0 | |
1450 | || it->current.overlay_string_index >= 0) | |
1451 | { | |
1452 | set_iterator_to_next (it); | |
1453 | move_it_in_display_line_to (it, -1, -1, 0); | |
1454 | } | |
1455 | it->continuation_lines_width += it->current_x; | |
1456 | } | |
1457 | ||
1458 | it->current_y = first_y; | |
1459 | it->vpos = 0; | |
1460 | it->current_x = it->hpos = 0; | |
1461 | } | |
1462 | ||
1463 | #if 0 /* Don't assert the following because start_display is sometimes | |
1464 | called intentionally with a window start that is not at a | |
1465 | line start. Please leave this code in as a comment. */ | |
1466 | ||
1467 | /* Window start should be on a line start, now. */ | |
1468 | xassert (it->continuation_lines_width | |
1469 | || IT_CHARPOS (it) == BEGV | |
1470 | || FETCH_BYTE (IT_BYTEPOS (it) - 1) == '\n'); | |
1471 | #endif /* 0 */ | |
1472 | } | |
1473 | ||
1474 | ||
1475 | /* Initialize IT for stepping through current_buffer in window W, | |
1476 | starting at position POS that includes overlay string and display | |
1477 | vector/ control character translation position information. */ | |
1478 | ||
1479 | static void | |
1480 | init_from_display_pos (it, w, pos) | |
1481 | struct it *it; | |
1482 | struct window *w; | |
1483 | struct display_pos *pos; | |
1484 | { | |
1485 | /* Keep in mind: the call to reseat in init_iterator skips invisible | |
1486 | text, so we might end up at a position different from POS. This | |
1487 | is only a problem when POS is a row start after a newline and an | |
1488 | overlay starts there with an after-string, and the overlay has an | |
1489 | invisible property. Since we don't skip invisible text in | |
1490 | display_line and elsewhere immediately after consuming the | |
1491 | newline before the row start, such a POS will not be in a string, | |
1492 | but the call to init_iterator below will move us to the | |
1493 | after-string. */ | |
1494 | init_iterator (it, w, CHARPOS (pos->pos), BYTEPOS (pos->pos), | |
1495 | NULL, DEFAULT_FACE_ID); | |
1496 | ||
1497 | /* If position is within an overlay string, set up IT to | |
1498 | the right overlay string. */ | |
1499 | if (pos->overlay_string_index >= 0) | |
1500 | { | |
1501 | int relative_index; | |
1502 | ||
1503 | /* We already have the first chunk of overlay strings in | |
1504 | IT->overlay_strings. Load more until the one for | |
1505 | pos->overlay_string_index is in IT->overlay_strings. */ | |
1506 | if (pos->overlay_string_index >= OVERLAY_STRING_CHUNK_SIZE) | |
1507 | { | |
1508 | int n = pos->overlay_string_index / OVERLAY_STRING_CHUNK_SIZE; | |
1509 | it->current.overlay_string_index = 0; | |
1510 | while (n--) | |
1511 | { | |
1512 | load_overlay_strings (it); | |
1513 | it->current.overlay_string_index += OVERLAY_STRING_CHUNK_SIZE; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | it->current.overlay_string_index = pos->overlay_string_index; | |
1518 | relative_index = (it->current.overlay_string_index | |
1519 | % OVERLAY_STRING_CHUNK_SIZE); | |
1520 | it->string = it->overlay_strings[relative_index]; | |
1521 | it->current.string_pos = pos->string_pos; | |
1522 | it->method = next_element_from_string; | |
1523 | } | |
1524 | else if (CHARPOS (pos->string_pos) >= 0) | |
1525 | { | |
1526 | /* Recorded position is not in an overlay string, but in another | |
1527 | string. This can only be a string from a `display' property. | |
1528 | IT should already be filled with that string. */ | |
1529 | it->current.string_pos = pos->string_pos; | |
1530 | xassert (STRINGP (it->string)); | |
1531 | } | |
1532 | ||
1533 | /* Restore position in display vector translations or control | |
1534 | character translations. */ | |
1535 | if (pos->dpvec_index >= 0) | |
1536 | { | |
1537 | /* This fills IT->dpvec. */ | |
1538 | get_next_display_element (it); | |
1539 | xassert (it->dpvec && it->current.dpvec_index == 0); | |
1540 | it->current.dpvec_index = pos->dpvec_index; | |
1541 | } | |
1542 | ||
1543 | CHECK_IT (it); | |
1544 | } | |
1545 | ||
1546 | ||
1547 | /* Initialize IT for stepping through current_buffer in window W | |
1548 | starting at ROW->start. */ | |
1549 | ||
1550 | static void | |
1551 | init_to_row_start (it, w, row) | |
1552 | struct it *it; | |
1553 | struct window *w; | |
1554 | struct glyph_row *row; | |
1555 | { | |
1556 | init_from_display_pos (it, w, &row->start); | |
1557 | it->continuation_lines_width = row->continuation_lines_width; | |
1558 | CHECK_IT (it); | |
1559 | } | |
1560 | ||
1561 | ||
1562 | /* Initialize IT for stepping through current_buffer in window W | |
1563 | starting in the line following ROW, i.e. starting at ROW->end. */ | |
1564 | ||
1565 | static void | |
1566 | init_to_row_end (it, w, row) | |
1567 | struct it *it; | |
1568 | struct window *w; | |
1569 | struct glyph_row *row; | |
1570 | { | |
1571 | init_from_display_pos (it, w, &row->end); | |
1572 | ||
1573 | if (row->continued_p) | |
1574 | it->continuation_lines_width = (row->continuation_lines_width | |
1575 | + row->pixel_width); | |
1576 | CHECK_IT (it); | |
1577 | } | |
1578 | ||
1579 | ||
1580 | ||
1581 | \f | |
1582 | /*********************************************************************** | |
1583 | Text properties | |
1584 | ***********************************************************************/ | |
1585 | ||
1586 | /* Called when IT reaches IT->stop_charpos. Handle text property and | |
1587 | overlay changes. Set IT->stop_charpos to the next position where | |
1588 | to stop. */ | |
1589 | ||
1590 | static void | |
1591 | handle_stop (it) | |
1592 | struct it *it; | |
1593 | { | |
1594 | enum prop_handled handled; | |
1595 | int handle_overlay_change_p = 1; | |
1596 | struct props *p; | |
1597 | ||
1598 | it->dpvec = NULL; | |
1599 | it->current.dpvec_index = -1; | |
1600 | ||
1601 | do | |
1602 | { | |
1603 | handled = HANDLED_NORMALLY; | |
1604 | ||
1605 | /* Call text property handlers. */ | |
1606 | for (p = it_props; p->handler; ++p) | |
1607 | { | |
1608 | handled = p->handler (it); | |
1609 | ||
1610 | if (handled == HANDLED_RECOMPUTE_PROPS) | |
1611 | break; | |
1612 | else if (handled == HANDLED_RETURN) | |
1613 | return; | |
1614 | else if (handled == HANDLED_OVERLAY_STRING_CONSUMED) | |
1615 | handle_overlay_change_p = 0; | |
1616 | } | |
1617 | ||
1618 | if (handled != HANDLED_RECOMPUTE_PROPS) | |
1619 | { | |
1620 | /* Don't check for overlay strings below when set to deliver | |
1621 | characters from a display vector. */ | |
1622 | if (it->method == next_element_from_display_vector) | |
1623 | handle_overlay_change_p = 0; | |
1624 | ||
1625 | /* Handle overlay changes. */ | |
1626 | if (handle_overlay_change_p) | |
1627 | handled = handle_overlay_change (it); | |
1628 | ||
1629 | /* Determine where to stop next. */ | |
1630 | if (handled == HANDLED_NORMALLY) | |
1631 | compute_stop_pos (it); | |
1632 | } | |
1633 | } | |
1634 | while (handled == HANDLED_RECOMPUTE_PROPS); | |
1635 | } | |
1636 | ||
1637 | ||
1638 | /* Compute IT->stop_charpos from text property and overlay change | |
1639 | information for IT's current position. */ | |
1640 | ||
1641 | static void | |
1642 | compute_stop_pos (it) | |
1643 | struct it *it; | |
1644 | { | |
1645 | register INTERVAL iv, next_iv; | |
1646 | Lisp_Object object, limit, position; | |
1647 | ||
1648 | /* If nowhere else, stop at the end. */ | |
1649 | it->stop_charpos = it->end_charpos; | |
1650 | ||
1651 | if (STRINGP (it->string)) | |
1652 | { | |
1653 | /* Strings are usually short, so don't limit the search for | |
1654 | properties. */ | |
1655 | object = it->string; | |
1656 | limit = Qnil; | |
1657 | XSETFASTINT (position, IT_STRING_CHARPOS (*it)); | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | int charpos; | |
1662 | ||
1663 | /* If next overlay change is in front of the current stop pos | |
1664 | (which is IT->end_charpos), stop there. Note: value of | |
1665 | next_overlay_change is point-max if no overlay change | |
1666 | follows. */ | |
1667 | charpos = next_overlay_change (IT_CHARPOS (*it)); | |
1668 | if (charpos < it->stop_charpos) | |
1669 | it->stop_charpos = charpos; | |
1670 | ||
1671 | /* If showing the region, we have to stop at the region | |
1672 | start or end because the face might change there. */ | |
1673 | if (it->region_beg_charpos > 0) | |
1674 | { | |
1675 | if (IT_CHARPOS (*it) < it->region_beg_charpos) | |
1676 | it->stop_charpos = min (it->stop_charpos, it->region_beg_charpos); | |
1677 | else if (IT_CHARPOS (*it) < it->region_end_charpos) | |
1678 | it->stop_charpos = min (it->stop_charpos, it->region_end_charpos); | |
1679 | } | |
1680 | ||
1681 | /* Set up variables for computing the stop position from text | |
1682 | property changes. */ | |
1683 | XSETBUFFER (object, current_buffer); | |
1684 | XSETFASTINT (limit, IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT); | |
1685 | XSETFASTINT (position, IT_CHARPOS (*it)); | |
1686 | ||
1687 | } | |
1688 | ||
1689 | /* Get the interval containing IT's position. Value is a null | |
1690 | interval if there isn't such an interval. */ | |
1691 | iv = validate_interval_range (object, &position, &position, 0); | |
1692 | if (!NULL_INTERVAL_P (iv)) | |
1693 | { | |
1694 | Lisp_Object values_here[LAST_PROP_IDX]; | |
1695 | struct props *p; | |
1696 | ||
1697 | /* Get properties here. */ | |
1698 | for (p = it_props; p->handler; ++p) | |
1699 | values_here[p->idx] = textget (iv->plist, *p->name); | |
1700 | ||
1701 | /* Look for an interval following iv that has different | |
1702 | properties. */ | |
1703 | for (next_iv = next_interval (iv); | |
1704 | (!NULL_INTERVAL_P (next_iv) | |
1705 | && (NILP (limit) | |
1706 | || XFASTINT (limit) > next_iv->position)); | |
1707 | next_iv = next_interval (next_iv)) | |
1708 | { | |
1709 | for (p = it_props; p->handler; ++p) | |
1710 | { | |
1711 | Lisp_Object new_value; | |
1712 | ||
1713 | new_value = textget (next_iv->plist, *p->name); | |
1714 | if (!EQ (values_here[p->idx], new_value)) | |
1715 | break; | |
1716 | } | |
1717 | ||
1718 | if (p->handler) | |
1719 | break; | |
1720 | } | |
1721 | ||
1722 | if (!NULL_INTERVAL_P (next_iv)) | |
1723 | { | |
1724 | if (INTEGERP (limit) | |
1725 | && next_iv->position >= XFASTINT (limit)) | |
1726 | /* No text property change up to limit. */ | |
1727 | it->stop_charpos = min (XFASTINT (limit), it->stop_charpos); | |
1728 | else | |
1729 | /* Text properties change in next_iv. */ | |
1730 | it->stop_charpos = min (it->stop_charpos, next_iv->position); | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | xassert (STRINGP (it->string) | |
1735 | || (it->stop_charpos >= BEGV | |
1736 | && it->stop_charpos >= IT_CHARPOS (*it))); | |
1737 | } | |
1738 | ||
1739 | ||
1740 | /* Return the position of the next overlay change after POS in | |
1741 | current_buffer. Value is point-max if no overlay change | |
1742 | follows. This is like `next-overlay-change' but doesn't use | |
1743 | xmalloc. */ | |
1744 | ||
1745 | static int | |
1746 | next_overlay_change (pos) | |
1747 | int pos; | |
1748 | { | |
1749 | int noverlays; | |
1750 | int endpos; | |
1751 | Lisp_Object *overlays; | |
1752 | int len; | |
1753 | int i; | |
1754 | ||
1755 | /* Get all overlays at the given position. */ | |
1756 | len = 10; | |
1757 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1758 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1759 | if (noverlays > len) | |
1760 | { | |
1761 | len = noverlays; | |
1762 | overlays = (Lisp_Object *) alloca (len * sizeof *overlays); | |
1763 | noverlays = overlays_at (pos, 0, &overlays, &len, &endpos, NULL); | |
1764 | } | |
1765 | ||
1766 | /* If any of these overlays ends before endpos, | |
1767 | use its ending point instead. */ | |
1768 | for (i = 0; i < noverlays; ++i) | |
1769 | { | |
1770 | Lisp_Object oend; | |
1771 | int oendpos; | |
1772 | ||
1773 | oend = OVERLAY_END (overlays[i]); | |
1774 | oendpos = OVERLAY_POSITION (oend); | |
1775 | endpos = min (endpos, oendpos); | |
1776 | } | |
1777 | ||
1778 | return endpos; | |
1779 | } | |
1780 | ||
1781 | ||
1782 | \f | |
1783 | /*********************************************************************** | |
1784 | Fontification | |
1785 | ***********************************************************************/ | |
1786 | ||
1787 | /* Handle changes in the `fontified' property of the current buffer by | |
1788 | calling hook functions from Qfontification_functions to fontify | |
1789 | regions of text. */ | |
1790 | ||
1791 | static enum prop_handled | |
1792 | handle_fontified_prop (it) | |
1793 | struct it *it; | |
1794 | { | |
1795 | Lisp_Object prop, pos; | |
1796 | enum prop_handled handled = HANDLED_NORMALLY; | |
2bf6fa4b | 1797 | struct gcpro gcpro1; |
5f5c8ee5 GM |
1798 | |
1799 | /* Get the value of the `fontified' property at IT's current buffer | |
1800 | position. (The `fontified' property doesn't have a special | |
1801 | meaning in strings.) If the value is nil, call functions from | |
1802 | Qfontification_functions. */ | |
1803 | if (!STRINGP (it->string) | |
1804 | && it->s == NULL | |
1805 | && !NILP (Vfontification_functions) | |
1806 | && (pos = make_number (IT_CHARPOS (*it)), | |
1807 | prop = Fget_char_property (pos, Qfontified, Qnil), | |
1808 | NILP (prop))) | |
1809 | { | |
1810 | Lisp_Object args[2]; | |
1811 | ||
2bf6fa4b | 1812 | GCPRO1 (pos); |
5f5c8ee5 GM |
1813 | /* Run the hook functions. */ |
1814 | args[0] = Qfontification_functions; | |
1815 | args[1] = pos; | |
1816 | Frun_hook_with_args (make_number (2), args); | |
1817 | ||
1818 | /* Return HANDLED_RECOMPUTE_PROPS only if function fontified | |
1819 | something. This avoids an endless loop if they failed to | |
1820 | fontify the text for which reason ever. */ | |
1821 | if (!NILP (Fget_char_property (pos, Qfontified, Qnil))) | |
1822 | handled = HANDLED_RECOMPUTE_PROPS; | |
2bf6fa4b | 1823 | UNGCPRO; |
5f5c8ee5 GM |
1824 | } |
1825 | ||
1826 | return handled; | |
1827 | } | |
1828 | ||
1829 | ||
1830 | \f | |
1831 | /*********************************************************************** | |
1832 | Faces | |
1833 | ***********************************************************************/ | |
1834 | ||
1835 | /* Set up iterator IT from face properties at its current position. | |
1836 | Called from handle_stop. */ | |
1837 | ||
1838 | static enum prop_handled | |
1839 | handle_face_prop (it) | |
1840 | struct it *it; | |
1841 | { | |
1842 | int new_face_id, next_stop; | |
1843 | ||
1844 | if (!STRINGP (it->string)) | |
1845 | { | |
1846 | new_face_id | |
1847 | = face_at_buffer_position (it->w, | |
1848 | IT_CHARPOS (*it), | |
1849 | it->region_beg_charpos, | |
1850 | it->region_end_charpos, | |
1851 | &next_stop, | |
1852 | (IT_CHARPOS (*it) | |
1853 | + TEXT_PROP_DISTANCE_LIMIT), | |
1854 | 0); | |
1855 | ||
1856 | /* Is this a start of a run of characters with box face? | |
1857 | Caveat: this can be called for a freshly initialized | |
1858 | iterator; face_id is -1 is this case. We know that the new | |
1859 | face will not change until limit, i.e. if the new face has a | |
1860 | box, all characters up to limit will have one. But, as | |
1861 | usual, we don't know whether limit is really the end. */ | |
1862 | if (new_face_id != it->face_id) | |
1863 | { | |
1864 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1865 | ||
1866 | /* If new face has a box but old face has not, this is | |
1867 | the start of a run of characters with box, i.e. it has | |
1868 | a shadow on the left side. The value of face_id of the | |
1869 | iterator will be -1 if this is the initial call that gets | |
1870 | the face. In this case, we have to look in front of IT's | |
1871 | position and see whether there is a face != new_face_id. */ | |
1872 | it->start_of_box_run_p | |
1873 | = (new_face->box != FACE_NO_BOX | |
1874 | && (it->face_id >= 0 | |
1875 | || IT_CHARPOS (*it) == BEG | |
1876 | || new_face_id != face_before_it_pos (it))); | |
1877 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1878 | } | |
1879 | } | |
1880 | else | |
1881 | { | |
1882 | new_face_id | |
1883 | = face_at_string_position (it->w, | |
1884 | it->string, | |
1885 | IT_STRING_CHARPOS (*it), | |
1886 | (it->current.overlay_string_index >= 0 | |
1887 | ? IT_CHARPOS (*it) | |
1888 | : 0), | |
1889 | it->region_beg_charpos, | |
1890 | it->region_end_charpos, | |
1891 | &next_stop, | |
1892 | it->base_face_id); | |
1893 | ||
1894 | #if 0 /* This shouldn't be neccessary. Let's check it. */ | |
1895 | /* If IT is used to display a mode line we would really like to | |
1896 | use the mode line face instead of the frame's default face. */ | |
1897 | if (it->glyph_row == MATRIX_MODE_LINE_ROW (it->w->desired_matrix) | |
1898 | && new_face_id == DEFAULT_FACE_ID) | |
1899 | new_face_id = MODE_LINE_FACE_ID; | |
1900 | #endif | |
1901 | ||
1902 | /* Is this a start of a run of characters with box? Caveat: | |
1903 | this can be called for a freshly allocated iterator; face_id | |
1904 | is -1 is this case. We know that the new face will not | |
1905 | change until the next check pos, i.e. if the new face has a | |
1906 | box, all characters up to that position will have a | |
1907 | box. But, as usual, we don't know whether that position | |
1908 | is really the end. */ | |
1909 | if (new_face_id != it->face_id) | |
1910 | { | |
1911 | struct face *new_face = FACE_FROM_ID (it->f, new_face_id); | |
1912 | struct face *old_face = FACE_FROM_ID (it->f, it->face_id); | |
1913 | ||
1914 | /* If new face has a box but old face hasn't, this is the | |
1915 | start of a run of characters with box, i.e. it has a | |
1916 | shadow on the left side. */ | |
1917 | it->start_of_box_run_p | |
1918 | = new_face->box && (old_face == NULL || !old_face->box); | |
1919 | it->face_box_p = new_face->box != FACE_NO_BOX; | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | it->face_id = new_face_id; | |
1924 | it->charset = CHARSET_ASCII; | |
1925 | return HANDLED_NORMALLY; | |
1926 | } | |
1927 | ||
1928 | ||
1929 | /* Compute the face one character before or after the current position | |
1930 | of IT. BEFORE_P non-zero means get the face in front of IT's | |
1931 | position. Value is the id of the face. */ | |
1932 | ||
1933 | static int | |
1934 | face_before_or_after_it_pos (it, before_p) | |
1935 | struct it *it; | |
1936 | int before_p; | |
1937 | { | |
1938 | int face_id, limit; | |
1939 | int next_check_charpos; | |
1940 | struct text_pos pos; | |
1941 | ||
1942 | xassert (it->s == NULL); | |
1943 | ||
1944 | if (STRINGP (it->string)) | |
1945 | { | |
1946 | /* No face change past the end of the string (for the case | |
1947 | we are padding with spaces). No face change before the | |
1948 | string start. */ | |
1949 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size | |
1950 | || (IT_STRING_CHARPOS (*it) == 0 && before_p)) | |
1951 | return it->face_id; | |
1952 | ||
1953 | /* Set pos to the position before or after IT's current position. */ | |
1954 | if (before_p) | |
1955 | pos = string_pos (IT_STRING_CHARPOS (*it) - 1, it->string); | |
1956 | else | |
260a86a0 KH |
1957 | /* For composition, we must check the character after the |
1958 | composition. */ | |
1959 | pos = (it->what == IT_COMPOSITION | |
1960 | ? string_pos (IT_STRING_CHARPOS (*it) + it->cmp_len, it->string) | |
1961 | : string_pos (IT_STRING_CHARPOS (*it) + 1, it->string)); | |
5f5c8ee5 GM |
1962 | |
1963 | /* Get the face for ASCII, or unibyte. */ | |
1964 | face_id | |
1965 | = face_at_string_position (it->w, | |
1966 | it->string, | |
1967 | CHARPOS (pos), | |
1968 | (it->current.overlay_string_index >= 0 | |
1969 | ? IT_CHARPOS (*it) | |
1970 | : 0), | |
1971 | it->region_beg_charpos, | |
1972 | it->region_end_charpos, | |
1973 | &next_check_charpos, | |
1974 | it->base_face_id); | |
1975 | ||
1976 | /* Correct the face for charsets different from ASCII. Do it | |
1977 | for the multibyte case only. The face returned above is | |
1978 | suitable for unibyte text if IT->string is unibyte. */ | |
1979 | if (STRING_MULTIBYTE (it->string)) | |
1980 | { | |
1981 | unsigned char *p = XSTRING (it->string)->data + BYTEPOS (pos); | |
1982 | int rest = STRING_BYTES (XSTRING (it->string)) - BYTEPOS (pos); | |
1983 | int c, len, charset; | |
1984 | ||
4fdb80f2 | 1985 | c = string_char_and_length (p, rest, &len); |
5f5c8ee5 GM |
1986 | charset = CHAR_CHARSET (c); |
1987 | if (charset != CHARSET_ASCII) | |
1988 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
1989 | } | |
1990 | } | |
1991 | else | |
1992 | { | |
70851746 GM |
1993 | if ((IT_CHARPOS (*it) >= ZV && !before_p) |
1994 | || (IT_CHARPOS (*it) <= BEGV && before_p)) | |
1995 | return it->face_id; | |
1996 | ||
5f5c8ee5 GM |
1997 | limit = IT_CHARPOS (*it) + TEXT_PROP_DISTANCE_LIMIT; |
1998 | pos = it->current.pos; | |
1999 | ||
2000 | if (before_p) | |
2001 | DEC_TEXT_POS (pos); | |
2002 | else | |
260a86a0 KH |
2003 | { |
2004 | if (it->what == IT_COMPOSITION) | |
2005 | /* For composition, we must check the position after the | |
2006 | composition. */ | |
2007 | pos.charpos += it->cmp_len, pos.bytepos += it->len; | |
2008 | else | |
2009 | INC_TEXT_POS (pos); | |
2010 | } | |
5f5c8ee5 GM |
2011 | /* Determine face for CHARSET_ASCII, or unibyte. */ |
2012 | face_id = face_at_buffer_position (it->w, | |
2013 | CHARPOS (pos), | |
2014 | it->region_beg_charpos, | |
2015 | it->region_end_charpos, | |
2016 | &next_check_charpos, | |
2017 | limit, 0); | |
2018 | ||
2019 | /* Correct the face for charsets different from ASCII. Do it | |
2020 | for the multibyte case only. The face returned above is | |
2021 | suitable for unibyte text if current_buffer is unibyte. */ | |
2022 | if (it->multibyte_p) | |
2023 | { | |
2024 | int charset = charset_at_position (pos); | |
2025 | if (charset != CHARSET_ASCII) | |
2026 | face_id = FACE_FOR_CHARSET (it->f, face_id, charset); | |
2027 | } | |
2028 | } | |
2029 | ||
2030 | return face_id; | |
2031 | } | |
2032 | ||
2033 | ||
2034 | \f | |
2035 | /*********************************************************************** | |
2036 | Invisible text | |
2037 | ***********************************************************************/ | |
2038 | ||
2039 | /* Set up iterator IT from invisible properties at its current | |
2040 | position. Called from handle_stop. */ | |
2041 | ||
2042 | static enum prop_handled | |
2043 | handle_invisible_prop (it) | |
2044 | struct it *it; | |
2045 | { | |
2046 | enum prop_handled handled = HANDLED_NORMALLY; | |
2047 | ||
2048 | if (STRINGP (it->string)) | |
2049 | { | |
2050 | extern Lisp_Object Qinvisible; | |
2051 | Lisp_Object prop, end_charpos, limit, charpos; | |
2052 | ||
2053 | /* Get the value of the invisible text property at the | |
2054 | current position. Value will be nil if there is no such | |
2055 | property. */ | |
2056 | XSETFASTINT (charpos, IT_STRING_CHARPOS (*it)); | |
2057 | prop = Fget_text_property (charpos, Qinvisible, it->string); | |
2058 | ||
2059 | if (!NILP (prop)) | |
2060 | { | |
2061 | handled = HANDLED_RECOMPUTE_PROPS; | |
2062 | ||
2063 | /* Get the position at which the next change of the | |
2064 | invisible text property can be found in IT->string. | |
2065 | Value will be nil if the property value is the same for | |
2066 | all the rest of IT->string. */ | |
2067 | XSETINT (limit, XSTRING (it->string)->size); | |
2068 | end_charpos = Fnext_single_property_change (charpos, Qinvisible, | |
2069 | it->string, limit); | |
2070 | ||
2071 | /* Text at current position is invisible. The next | |
2072 | change in the property is at position end_charpos. | |
2073 | Move IT's current position to that position. */ | |
2074 | if (INTEGERP (end_charpos) | |
2075 | && XFASTINT (end_charpos) < XFASTINT (limit)) | |
2076 | { | |
2077 | struct text_pos old; | |
2078 | old = it->current.string_pos; | |
2079 | IT_STRING_CHARPOS (*it) = XFASTINT (end_charpos); | |
2080 | compute_string_pos (&it->current.string_pos, old, it->string); | |
2081 | } | |
2082 | else | |
2083 | { | |
2084 | /* The rest of the string is invisible. If this is an | |
2085 | overlay string, proceed with the next overlay string | |
2086 | or whatever comes and return a character from there. */ | |
2087 | if (it->current.overlay_string_index >= 0) | |
2088 | { | |
2089 | next_overlay_string (it); | |
2090 | /* Don't check for overlay strings when we just | |
2091 | finished processing them. */ | |
2092 | handled = HANDLED_OVERLAY_STRING_CONSUMED; | |
2093 | } | |
2094 | else | |
2095 | { | |
2096 | struct Lisp_String *s = XSTRING (it->string); | |
2097 | IT_STRING_CHARPOS (*it) = s->size; | |
2098 | IT_STRING_BYTEPOS (*it) = STRING_BYTES (s); | |
2099 | } | |
2100 | } | |
2101 | } | |
2102 | } | |
2103 | else | |
2104 | { | |
2105 | int visible_p, newpos, next_stop; | |
2106 | Lisp_Object pos, prop; | |
2107 | ||
2108 | /* First of all, is there invisible text at this position? */ | |
2109 | XSETFASTINT (pos, IT_CHARPOS (*it)); | |
2110 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2111 | ||
2112 | /* If we are on invisible text, skip over it. */ | |
2113 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
2114 | { | |
2115 | /* Record whether we have to display an ellipsis for the | |
2116 | invisible text. */ | |
2117 | int display_ellipsis_p | |
2118 | = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop); | |
2119 | ||
2120 | handled = HANDLED_RECOMPUTE_PROPS; | |
2121 | ||
2122 | /* Loop skipping over invisible text. The loop is left at | |
2123 | ZV or with IT on the first char being visible again. */ | |
2124 | do | |
2125 | { | |
2126 | /* Try to skip some invisible text. Return value is the | |
2127 | position reached which can be equal to IT's position | |
2128 | if there is nothing invisible here. This skips both | |
2129 | over invisible text properties and overlays with | |
2130 | invisible property. */ | |
2131 | newpos = skip_invisible (IT_CHARPOS (*it), | |
2132 | &next_stop, ZV, it->window); | |
2133 | ||
2134 | /* If we skipped nothing at all we weren't at invisible | |
2135 | text in the first place. If everything to the end of | |
2136 | the buffer was skipped, end the loop. */ | |
2137 | if (newpos == IT_CHARPOS (*it) || newpos >= ZV) | |
2138 | visible_p = 1; | |
2139 | else | |
2140 | { | |
2141 | /* We skipped some characters but not necessarily | |
2142 | all there are. Check if we ended up on visible | |
2143 | text. Fget_char_property returns the property of | |
2144 | the char before the given position, i.e. if we | |
2145 | get visible_p = 1, this means that the char at | |
2146 | newpos is visible. */ | |
2147 | XSETFASTINT (pos, newpos); | |
2148 | prop = Fget_char_property (pos, Qinvisible, it->window); | |
2149 | visible_p = !TEXT_PROP_MEANS_INVISIBLE (prop); | |
2150 | } | |
2151 | ||
2152 | /* If we ended up on invisible text, proceed to | |
2153 | skip starting with next_stop. */ | |
2154 | if (!visible_p) | |
2155 | IT_CHARPOS (*it) = next_stop; | |
2156 | } | |
2157 | while (!visible_p); | |
2158 | ||
2159 | /* The position newpos is now either ZV or on visible text. */ | |
2160 | IT_CHARPOS (*it) = newpos; | |
2161 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (newpos); | |
2162 | ||
2163 | /* Maybe return `...' next for the end of the invisible text. */ | |
2164 | if (display_ellipsis_p) | |
2165 | { | |
2166 | if (it->dp | |
2167 | && VECTORP (DISP_INVIS_VECTOR (it->dp))) | |
2168 | { | |
2169 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
2170 | it->dpvec = v->contents; | |
2171 | it->dpend = v->contents + v->size; | |
2172 | } | |
2173 | else | |
2174 | { | |
2175 | /* Default `...'. */ | |
2176 | it->dpvec = default_invis_vector; | |
2177 | it->dpend = default_invis_vector + 3; | |
2178 | } | |
2179 | ||
2180 | /* The ellipsis display does not replace the display of | |
2181 | the character at the new position. Indicate this by | |
2182 | setting IT->dpvec_char_len to zero. */ | |
2183 | it->dpvec_char_len = 0; | |
2184 | ||
2185 | it->current.dpvec_index = 0; | |
2186 | it->method = next_element_from_display_vector; | |
2187 | } | |
2188 | } | |
2189 | } | |
2190 | ||
2191 | return handled; | |
2192 | } | |
2193 | ||
2194 | ||
2195 | \f | |
2196 | /*********************************************************************** | |
2197 | 'display' property | |
2198 | ***********************************************************************/ | |
2199 | ||
2200 | /* Set up iterator IT from `display' property at its current position. | |
2201 | Called from handle_stop. */ | |
2202 | ||
2203 | static enum prop_handled | |
2204 | handle_display_prop (it) | |
2205 | struct it *it; | |
2206 | { | |
2207 | Lisp_Object prop, object; | |
2208 | struct text_pos *position; | |
2209 | int space_or_image_found_p; | |
2210 | ||
2211 | if (STRINGP (it->string)) | |
2212 | { | |
2213 | object = it->string; | |
2214 | position = &it->current.string_pos; | |
2215 | } | |
2216 | else | |
2217 | { | |
2218 | object = Qnil; | |
2219 | position = &it->current.pos; | |
2220 | } | |
2221 | ||
2222 | /* Reset those iterator values set from display property values. */ | |
2223 | it->font_height = Qnil; | |
2224 | it->space_width = Qnil; | |
2225 | it->voffset = 0; | |
2226 | ||
2227 | /* We don't support recursive `display' properties, i.e. string | |
2228 | values that have a string `display' property, that have a string | |
2229 | `display' property etc. */ | |
2230 | if (!it->string_from_display_prop_p) | |
2231 | it->area = TEXT_AREA; | |
2232 | ||
2233 | prop = Fget_char_property (make_number (position->charpos), | |
2234 | Qdisplay, object); | |
2235 | if (NILP (prop)) | |
2236 | return HANDLED_NORMALLY; | |
2237 | ||
2238 | space_or_image_found_p = 0; | |
f3751a65 GM |
2239 | if (CONSP (prop) |
2240 | && CONSP (XCAR (prop)) | |
2241 | && !EQ (Qmargin, XCAR (XCAR (prop)))) | |
5f5c8ee5 | 2242 | { |
f3751a65 | 2243 | /* A list of sub-properties. */ |
5f5c8ee5 GM |
2244 | while (CONSP (prop)) |
2245 | { | |
2246 | if (handle_single_display_prop (it, XCAR (prop), object, position)) | |
2247 | space_or_image_found_p = 1; | |
2248 | prop = XCDR (prop); | |
2249 | } | |
2250 | } | |
2251 | else if (VECTORP (prop)) | |
2252 | { | |
2253 | int i; | |
2254 | for (i = 0; i < XVECTOR (prop)->size; ++i) | |
2255 | if (handle_single_display_prop (it, XVECTOR (prop)->contents[i], | |
2256 | object, position)) | |
2257 | space_or_image_found_p = 1; | |
2258 | } | |
2259 | else | |
2260 | { | |
2261 | if (handle_single_display_prop (it, prop, object, position)) | |
2262 | space_or_image_found_p = 1; | |
2263 | } | |
2264 | ||
2265 | return space_or_image_found_p ? HANDLED_RETURN : HANDLED_NORMALLY; | |
2266 | } | |
2267 | ||
2268 | ||
6c577098 | 2269 | /* Value is the position of the end of the `display' property starting |
5f5c8ee5 GM |
2270 | at START_POS in OBJECT. */ |
2271 | ||
2272 | static struct text_pos | |
2273 | display_prop_end (it, object, start_pos) | |
2274 | struct it *it; | |
2275 | Lisp_Object object; | |
2276 | struct text_pos start_pos; | |
2277 | { | |
2278 | Lisp_Object end; | |
2279 | struct text_pos end_pos; | |
5f5c8ee5 | 2280 | |
6c577098 GM |
2281 | end = next_single_char_property_change (make_number (CHARPOS (start_pos)), |
2282 | Qdisplay, object, Qnil); | |
2283 | CHARPOS (end_pos) = XFASTINT (end); | |
2284 | if (STRINGP (object)) | |
5f5c8ee5 GM |
2285 | compute_string_pos (&end_pos, start_pos, it->string); |
2286 | else | |
6c577098 | 2287 | BYTEPOS (end_pos) = CHAR_TO_BYTE (XFASTINT (end)); |
5f5c8ee5 GM |
2288 | |
2289 | return end_pos; | |
2290 | } | |
2291 | ||
2292 | ||
2293 | /* Set up IT from a single `display' sub-property value PROP. OBJECT | |
2294 | is the object in which the `display' property was found. *POSITION | |
2295 | is the position at which it was found. | |
2296 | ||
2297 | If PROP is a `space' or `image' sub-property, set *POSITION to the | |
2298 | end position of the `display' property. | |
2299 | ||
2300 | Value is non-zero if a `space' or `image' property value was found. */ | |
2301 | ||
2302 | static int | |
2303 | handle_single_display_prop (it, prop, object, position) | |
2304 | struct it *it; | |
2305 | Lisp_Object prop; | |
2306 | Lisp_Object object; | |
2307 | struct text_pos *position; | |
2308 | { | |
2309 | Lisp_Object value; | |
2310 | int space_or_image_found_p = 0; | |
2311 | ||
2312 | Lisp_Object form; | |
2313 | ||
d3acf96b | 2314 | /* If PROP is a list of the form `(when FORM . VALUE)', FORM is |
5a4c88c4 | 2315 | evaluated. If the result is nil, VALUE is ignored. */ |
5f5c8ee5 | 2316 | form = Qt; |
d3acf96b | 2317 | if (CONSP (prop) && EQ (XCAR (prop), Qwhen)) |
5f5c8ee5 GM |
2318 | { |
2319 | prop = XCDR (prop); | |
2320 | if (!CONSP (prop)) | |
2321 | return 0; | |
2322 | form = XCAR (prop); | |
2323 | prop = XCDR (prop); | |
5f5c8ee5 GM |
2324 | } |
2325 | ||
2326 | if (!NILP (form) && !EQ (form, Qt)) | |
2327 | { | |
2328 | struct gcpro gcpro1; | |
2329 | struct text_pos end_pos, pt; | |
2330 | ||
2331 | end_pos = display_prop_end (it, object, *position); | |
2332 | GCPRO1 (form); | |
2333 | ||
2334 | /* Temporarily set point to the end position, and then evaluate | |
2335 | the form. This makes `(eolp)' work as FORM. */ | |
2336 | CHARPOS (pt) = PT; | |
2337 | BYTEPOS (pt) = PT_BYTE; | |
2338 | TEMP_SET_PT_BOTH (CHARPOS (end_pos), BYTEPOS (end_pos)); | |
2339 | form = eval_form (form); | |
2340 | TEMP_SET_PT_BOTH (CHARPOS (pt), BYTEPOS (pt)); | |
2341 | UNGCPRO; | |
2342 | } | |
2343 | ||
2344 | if (NILP (form)) | |
2345 | return 0; | |
2346 | ||
2347 | if (CONSP (prop) | |
2348 | && EQ (XCAR (prop), Qheight) | |
2349 | && CONSP (XCDR (prop))) | |
2350 | { | |
2351 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2352 | return 0; | |
2353 | ||
2354 | /* `(height HEIGHT)'. */ | |
2355 | it->font_height = XCAR (XCDR (prop)); | |
2356 | if (!NILP (it->font_height)) | |
2357 | { | |
2358 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2359 | int new_height = -1; | |
2360 | ||
2361 | if (CONSP (it->font_height) | |
2362 | && (EQ (XCAR (it->font_height), Qplus) | |
2363 | || EQ (XCAR (it->font_height), Qminus)) | |
2364 | && CONSP (XCDR (it->font_height)) | |
2365 | && INTEGERP (XCAR (XCDR (it->font_height)))) | |
2366 | { | |
2367 | /* `(+ N)' or `(- N)' where N is an integer. */ | |
2368 | int steps = XINT (XCAR (XCDR (it->font_height))); | |
2369 | if (EQ (XCAR (it->font_height), Qplus)) | |
2370 | steps = - steps; | |
2371 | it->face_id = smaller_face (it->f, it->face_id, steps); | |
2372 | } | |
2373 | else if (SYMBOLP (it->font_height)) | |
2374 | { | |
2375 | /* Call function with current height as argument. | |
2376 | Value is the new height. */ | |
2377 | Lisp_Object form, height; | |
2378 | struct gcpro gcpro1; | |
2379 | ||
2380 | height = face->lface[LFACE_HEIGHT_INDEX]; | |
2381 | form = Fcons (it->font_height, Fcons (height, Qnil)); | |
2382 | GCPRO1 (form); | |
2383 | height = eval_form (form); | |
2384 | if (NUMBERP (height)) | |
2385 | new_height = XFLOATINT (height); | |
2386 | UNGCPRO; | |
2387 | } | |
2388 | else if (NUMBERP (it->font_height)) | |
2389 | { | |
2390 | /* Value is a multiple of the canonical char height. */ | |
2391 | struct face *face; | |
2392 | ||
2393 | face = FACE_FROM_ID (it->f, DEFAULT_FACE_ID); | |
2394 | new_height = (XFLOATINT (it->font_height) | |
2395 | * XINT (face->lface[LFACE_HEIGHT_INDEX])); | |
2396 | } | |
2397 | else | |
2398 | { | |
2399 | /* Evaluate IT->font_height with `height' bound to the | |
2400 | current specified height to get the new height. */ | |
2401 | Lisp_Object value; | |
2402 | int count = specpdl_ptr - specpdl; | |
2403 | ||
2404 | specbind (Qheight, face->lface[LFACE_HEIGHT_INDEX]); | |
2405 | value = eval_form (it->font_height); | |
2406 | unbind_to (count, Qnil); | |
2407 | ||
2408 | if (NUMBERP (value)) | |
2409 | new_height = XFLOATINT (value); | |
2410 | } | |
2411 | ||
2412 | if (new_height > 0) | |
2413 | it->face_id = face_with_height (it->f, it->face_id, new_height); | |
2414 | } | |
2415 | } | |
2416 | else if (CONSP (prop) | |
2417 | && EQ (XCAR (prop), Qspace_width) | |
2418 | && CONSP (XCDR (prop))) | |
2419 | { | |
2420 | /* `(space_width WIDTH)'. */ | |
2421 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2422 | return 0; | |
2423 | ||
2424 | value = XCAR (XCDR (prop)); | |
2425 | if (NUMBERP (value) && XFLOATINT (value) > 0) | |
2426 | it->space_width = value; | |
2427 | } | |
2428 | else if (CONSP (prop) | |
2429 | && EQ (XCAR (prop), Qraise) | |
2430 | && CONSP (XCDR (prop))) | |
2431 | { | |
5f5c8ee5 GM |
2432 | /* `(raise FACTOR)'. */ |
2433 | if (FRAME_TERMCAP_P (it->f) || FRAME_MSDOS_P (it->f)) | |
2434 | return 0; | |
2435 | ||
fb3842a8 | 2436 | #ifdef HAVE_WINDOW_SYSTEM |
5f5c8ee5 GM |
2437 | value = XCAR (XCDR (prop)); |
2438 | if (NUMBERP (value)) | |
2439 | { | |
2440 | struct face *face = FACE_FROM_ID (it->f, it->face_id); | |
2441 | it->voffset = - (XFLOATINT (value) | |
1ab3e082 | 2442 | * (FONT_HEIGHT (face->font))); |
5f5c8ee5 GM |
2443 | } |
2444 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2445 | } | |
2446 | else if (!it->string_from_display_prop_p) | |
2447 | { | |
f3751a65 GM |
2448 | /* `((margin left-margin) VALUE)' or `((margin right-margin) |
2449 | VALUE) or `((margin nil) VALUE)' or VALUE. */ | |
5f5c8ee5 GM |
2450 | Lisp_Object location, value; |
2451 | struct text_pos start_pos; | |
2452 | int valid_p; | |
2453 | ||
2454 | /* Characters having this form of property are not displayed, so | |
2455 | we have to find the end of the property. */ | |
2456 | space_or_image_found_p = 1; | |
2457 | start_pos = *position; | |
2458 | *position = display_prop_end (it, object, start_pos); | |
2459 | ||
2460 | /* Let's stop at the new position and assume that all | |
2461 | text properties change there. */ | |
2462 | it->stop_charpos = position->charpos; | |
2463 | ||
f3751a65 GM |
2464 | location = Qunbound; |
2465 | if (CONSP (prop) && CONSP (XCAR (prop))) | |
5f5c8ee5 | 2466 | { |
f3751a65 GM |
2467 | Lisp_Object tem; |
2468 | ||
5f5c8ee5 | 2469 | value = XCDR (prop); |
f3751a65 GM |
2470 | if (CONSP (value)) |
2471 | value = XCAR (value); | |
2472 | ||
2473 | tem = XCAR (prop); | |
2474 | if (EQ (XCAR (tem), Qmargin) | |
2475 | && (tem = XCDR (tem), | |
2476 | tem = CONSP (tem) ? XCAR (tem) : Qnil, | |
2477 | (NILP (tem) | |
2478 | || EQ (tem, Qleft_margin) | |
2479 | || EQ (tem, Qright_margin)))) | |
2480 | location = tem; | |
5f5c8ee5 | 2481 | } |
f3751a65 GM |
2482 | |
2483 | if (EQ (location, Qunbound)) | |
5f5c8ee5 GM |
2484 | { |
2485 | location = Qnil; | |
2486 | value = prop; | |
2487 | } | |
2488 | ||
2489 | #ifdef HAVE_WINDOW_SYSTEM | |
fb3842a8 | 2490 | if (FRAME_TERMCAP_P (it->f)) |
5f5c8ee5 GM |
2491 | valid_p = STRINGP (value); |
2492 | else | |
2493 | valid_p = (STRINGP (value) | |
2494 | || (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2495 | || valid_image_p (value)); | |
2496 | #else /* not HAVE_WINDOW_SYSTEM */ | |
2497 | valid_p = STRINGP (value); | |
2498 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
2499 | ||
2500 | if ((EQ (location, Qleft_margin) | |
2501 | || EQ (location, Qright_margin) | |
2502 | || NILP (location)) | |
2503 | && valid_p) | |
2504 | { | |
2505 | /* Save current settings of IT so that we can restore them | |
2506 | when we are finished with the glyph property value. */ | |
2507 | push_it (it); | |
2508 | ||
2509 | if (NILP (location)) | |
2510 | it->area = TEXT_AREA; | |
2511 | else if (EQ (location, Qleft_margin)) | |
2512 | it->area = LEFT_MARGIN_AREA; | |
2513 | else | |
2514 | it->area = RIGHT_MARGIN_AREA; | |
2515 | ||
2516 | if (STRINGP (value)) | |
2517 | { | |
2518 | it->string = value; | |
2519 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2520 | it->current.overlay_string_index = -1; | |
2521 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2522 | it->end_charpos = it->string_nchars | |
2523 | = XSTRING (it->string)->size; | |
2524 | it->method = next_element_from_string; | |
2525 | it->stop_charpos = 0; | |
2526 | it->string_from_display_prop_p = 1; | |
2527 | } | |
2528 | else if (CONSP (value) && EQ (XCAR (value), Qspace)) | |
2529 | { | |
2530 | it->method = next_element_from_stretch; | |
2531 | it->object = value; | |
2532 | it->current.pos = it->position = start_pos; | |
2533 | } | |
2534 | #ifdef HAVE_WINDOW_SYSTEM | |
2535 | else | |
2536 | { | |
2537 | it->what = IT_IMAGE; | |
2538 | it->image_id = lookup_image (it->f, value); | |
2539 | it->position = start_pos; | |
2540 | it->object = NILP (object) ? it->w->buffer : object; | |
2541 | it->method = next_element_from_image; | |
2542 | ||
2543 | /* Say that we don't have consumed the characters with | |
2544 | `display' property yet. The call to pop_it in | |
2545 | set_iterator_to_next will clean this up. */ | |
2546 | *position = start_pos; | |
2547 | } | |
2548 | #endif /* HAVE_WINDOW_SYSTEM */ | |
2549 | } | |
2550 | } | |
2551 | ||
2552 | return space_or_image_found_p; | |
2553 | } | |
2554 | ||
2555 | ||
2556 | \f | |
260a86a0 KH |
2557 | /*********************************************************************** |
2558 | `composition' property | |
2559 | ***********************************************************************/ | |
2560 | ||
2561 | /* Set up iterator IT from `composition' property at its current | |
2562 | position. Called from handle_stop. */ | |
2563 | ||
2564 | static enum prop_handled | |
2565 | handle_composition_prop (it) | |
2566 | struct it *it; | |
2567 | { | |
2568 | Lisp_Object prop, string; | |
2569 | int pos, pos_byte, end; | |
2570 | enum prop_handled handled = HANDLED_NORMALLY; | |
2571 | ||
2572 | if (STRINGP (it->string)) | |
2573 | { | |
2574 | pos = IT_STRING_CHARPOS (*it); | |
2575 | pos_byte = IT_STRING_BYTEPOS (*it); | |
2576 | string = it->string; | |
2577 | } | |
2578 | else | |
2579 | { | |
2580 | pos = IT_CHARPOS (*it); | |
2581 | pos_byte = IT_BYTEPOS (*it); | |
2582 | string = Qnil; | |
2583 | } | |
2584 | ||
2585 | /* If there's a valid composition and point is not inside of the | |
2586 | composition (in the case that the composition is from the current | |
2587 | buffer), draw a glyph composed from the composition components. */ | |
2588 | if (find_composition (pos, -1, &pos, &end, &prop, string) | |
2589 | && COMPOSITION_VALID_P (pos, end, prop) | |
2590 | && (STRINGP (it->string) || (PT <= pos || PT >= end))) | |
2591 | { | |
2592 | int id = get_composition_id (pos, pos_byte, end - pos, prop, string); | |
2593 | ||
2594 | if (id >= 0) | |
2595 | { | |
2596 | it->method = next_element_from_composition; | |
2597 | it->cmp_id = id; | |
2598 | it->cmp_len = COMPOSITION_LENGTH (prop); | |
2599 | /* For a terminal, draw only the first character of the | |
2600 | components. */ | |
2601 | it->c = COMPOSITION_GLYPH (composition_table[id], 0); | |
2602 | it->len = (STRINGP (it->string) | |
2603 | ? string_char_to_byte (it->string, end) | |
2604 | : CHAR_TO_BYTE (end)) - pos_byte; | |
2605 | it->stop_charpos = end; | |
2606 | handled = HANDLED_RETURN; | |
2607 | } | |
2608 | } | |
2609 | ||
2610 | return handled; | |
2611 | } | |
2612 | ||
2613 | ||
2614 | \f | |
5f5c8ee5 GM |
2615 | /*********************************************************************** |
2616 | Overlay strings | |
2617 | ***********************************************************************/ | |
2618 | ||
2619 | /* The following structure is used to record overlay strings for | |
2620 | later sorting in load_overlay_strings. */ | |
2621 | ||
2622 | struct overlay_entry | |
2623 | { | |
2624 | Lisp_Object string; | |
2625 | int priority; | |
2626 | int after_string_p; | |
2627 | }; | |
2628 | ||
2629 | ||
2630 | /* Set up iterator IT from overlay strings at its current position. | |
2631 | Called from handle_stop. */ | |
2632 | ||
2633 | static enum prop_handled | |
2634 | handle_overlay_change (it) | |
2635 | struct it *it; | |
2636 | { | |
2637 | /* Overlays are handled in current_buffer only. */ | |
2638 | if (STRINGP (it->string)) | |
2639 | return HANDLED_NORMALLY; | |
2640 | else | |
2641 | return (get_overlay_strings (it) | |
2642 | ? HANDLED_RECOMPUTE_PROPS | |
2643 | : HANDLED_NORMALLY); | |
2644 | } | |
2645 | ||
2646 | ||
2647 | /* Set up the next overlay string for delivery by IT, if there is an | |
2648 | overlay string to deliver. Called by set_iterator_to_next when the | |
2649 | end of the current overlay string is reached. If there are more | |
2650 | overlay strings to display, IT->string and | |
2651 | IT->current.overlay_string_index are set appropriately here. | |
2652 | Otherwise IT->string is set to nil. */ | |
2653 | ||
2654 | static void | |
2655 | next_overlay_string (it) | |
2656 | struct it *it; | |
2657 | { | |
2658 | ++it->current.overlay_string_index; | |
2659 | if (it->current.overlay_string_index == it->n_overlay_strings) | |
2660 | { | |
2661 | /* No more overlay strings. Restore IT's settings to what | |
2662 | they were before overlay strings were processed, and | |
2663 | continue to deliver from current_buffer. */ | |
2664 | pop_it (it); | |
2665 | xassert (it->stop_charpos >= BEGV | |
2666 | && it->stop_charpos <= it->end_charpos); | |
2667 | it->string = Qnil; | |
2668 | it->current.overlay_string_index = -1; | |
2669 | SET_TEXT_POS (it->current.string_pos, -1, -1); | |
2670 | it->n_overlay_strings = 0; | |
2671 | it->method = next_element_from_buffer; | |
2672 | } | |
2673 | else | |
2674 | { | |
2675 | /* There are more overlay strings to process. If | |
2676 | IT->current.overlay_string_index has advanced to a position | |
2677 | where we must load IT->overlay_strings with more strings, do | |
2678 | it. */ | |
2679 | int i = it->current.overlay_string_index % OVERLAY_STRING_CHUNK_SIZE; | |
2680 | ||
2681 | if (it->current.overlay_string_index && i == 0) | |
2682 | load_overlay_strings (it); | |
2683 | ||
2684 | /* Initialize IT to deliver display elements from the overlay | |
2685 | string. */ | |
2686 | it->string = it->overlay_strings[i]; | |
2687 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2688 | SET_TEXT_POS (it->current.string_pos, 0, 0); | |
2689 | it->method = next_element_from_string; | |
2690 | it->stop_charpos = 0; | |
2691 | } | |
2692 | ||
2693 | CHECK_IT (it); | |
2694 | } | |
2695 | ||
2696 | ||
2697 | /* Compare two overlay_entry structures E1 and E2. Used as a | |
2698 | comparison function for qsort in load_overlay_strings. Overlay | |
2699 | strings for the same position are sorted so that | |
2700 | ||
2701 | 1. All after-strings come in front of before-strings. | |
2702 | ||
2703 | 2. Within after-strings, strings are sorted so that overlay strings | |
2704 | from overlays with higher priorities come first. | |
2705 | ||
2706 | 2. Within before-strings, strings are sorted so that overlay | |
2707 | strings from overlays with higher priorities come last. | |
2708 | ||
2709 | Value is analogous to strcmp. */ | |
2710 | ||
2711 | ||
2712 | static int | |
2713 | compare_overlay_entries (e1, e2) | |
2714 | void *e1, *e2; | |
2715 | { | |
2716 | struct overlay_entry *entry1 = (struct overlay_entry *) e1; | |
2717 | struct overlay_entry *entry2 = (struct overlay_entry *) e2; | |
2718 | int result; | |
2719 | ||
2720 | if (entry1->after_string_p != entry2->after_string_p) | |
2721 | /* Let after-strings appear in front of before-strings. */ | |
2722 | result = entry1->after_string_p ? -1 : 1; | |
2723 | else if (entry1->after_string_p) | |
2724 | /* After-strings sorted in order of decreasing priority. */ | |
2725 | result = entry2->priority - entry1->priority; | |
2726 | else | |
2727 | /* Before-strings sorted in order of increasing priority. */ | |
2728 | result = entry1->priority - entry2->priority; | |
2729 | ||
2730 | return result; | |
2731 | } | |
2732 | ||
2733 | ||
2734 | /* Load the vector IT->overlay_strings with overlay strings from IT's | |
2735 | current buffer position. Set IT->n_overlays to the total number of | |
2736 | overlay strings found. | |
2737 | ||
2738 | Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at | |
2739 | a time. On entry into load_overlay_strings, | |
2740 | IT->current.overlay_string_index gives the number of overlay | |
2741 | strings that have already been loaded by previous calls to this | |
2742 | function. | |
2743 | ||
2744 | Overlay strings are sorted so that after-string strings come in | |
2745 | front of before-string strings. Within before and after-strings, | |
2746 | strings are sorted by overlay priority. See also function | |
2747 | compare_overlay_entries. */ | |
2748 | ||
2749 | static void | |
2750 | load_overlay_strings (it) | |
2751 | struct it *it; | |
2752 | { | |
2753 | extern Lisp_Object Qafter_string, Qbefore_string, Qwindow, Qpriority; | |
2754 | Lisp_Object ov, overlay, window, str; | |
2755 | int start, end; | |
2756 | int size = 20; | |
2757 | int n = 0, i, j; | |
2758 | struct overlay_entry *entries | |
2759 | = (struct overlay_entry *) alloca (size * sizeof *entries); | |
2760 | ||
2761 | /* Append the overlay string STRING of overlay OVERLAY to vector | |
2762 | `entries' which has size `size' and currently contains `n' | |
2763 | elements. AFTER_P non-zero means STRING is an after-string of | |
2764 | OVERLAY. */ | |
2765 | #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \ | |
2766 | do \ | |
2767 | { \ | |
2768 | Lisp_Object priority; \ | |
2769 | \ | |
2770 | if (n == size) \ | |
2771 | { \ | |
2772 | int new_size = 2 * size; \ | |
2773 | struct overlay_entry *old = entries; \ | |
2774 | entries = \ | |
2775 | (struct overlay_entry *) alloca (new_size \ | |
2776 | * sizeof *entries); \ | |
2777 | bcopy (old, entries, size * sizeof *entries); \ | |
2778 | size = new_size; \ | |
2779 | } \ | |
2780 | \ | |
2781 | entries[n].string = (STRING); \ | |
2782 | priority = Foverlay_get ((OVERLAY), Qpriority); \ | |
2783 | entries[n].priority \ | |
2784 | = INTEGERP (priority) ? XFASTINT (priority) : 0; \ | |
2785 | entries[n].after_string_p = (AFTER_P); \ | |
2786 | ++n; \ | |
2787 | } \ | |
2788 | while (0) | |
2789 | ||
2790 | /* Process overlay before the overlay center. */ | |
2791 | for (ov = current_buffer->overlays_before; | |
2792 | CONSP (ov); | |
9472f927 | 2793 | ov = XCDR (ov)) |
5f5c8ee5 | 2794 | { |
9472f927 | 2795 | overlay = XCAR (ov); |
5f5c8ee5 GM |
2796 | xassert (OVERLAYP (overlay)); |
2797 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2798 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2799 | ||
2800 | if (end < IT_CHARPOS (*it)) | |
2801 | break; | |
2802 | ||
2803 | /* Skip this overlay if it doesn't start or end at IT's current | |
2804 | position. */ | |
2805 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2806 | continue; | |
2807 | ||
2808 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2809 | window = Foverlay_get (overlay, Qwindow); | |
2810 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2811 | continue; | |
2812 | ||
2813 | /* If overlay has a non-empty before-string, record it. */ | |
2814 | if (start == IT_CHARPOS (*it) | |
2815 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2816 | && XSTRING (str)->size) | |
2817 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2818 | ||
2819 | /* If overlay has a non-empty after-string, record it. */ | |
2820 | if (end == IT_CHARPOS (*it) | |
2821 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2822 | && XSTRING (str)->size) | |
2823 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2824 | } | |
2825 | ||
2826 | /* Process overlays after the overlay center. */ | |
2827 | for (ov = current_buffer->overlays_after; | |
2828 | CONSP (ov); | |
9472f927 | 2829 | ov = XCDR (ov)) |
5f5c8ee5 | 2830 | { |
9472f927 | 2831 | overlay = XCAR (ov); |
5f5c8ee5 GM |
2832 | xassert (OVERLAYP (overlay)); |
2833 | start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2834 | end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2835 | ||
2836 | if (start > IT_CHARPOS (*it)) | |
2837 | break; | |
2838 | ||
2839 | /* Skip this overlay if it doesn't start or end at IT's current | |
2840 | position. */ | |
2841 | if (end != IT_CHARPOS (*it) && start != IT_CHARPOS (*it)) | |
2842 | continue; | |
2843 | ||
2844 | /* Skip this overlay if it doesn't apply to IT->w. */ | |
2845 | window = Foverlay_get (overlay, Qwindow); | |
2846 | if (WINDOWP (window) && XWINDOW (window) != it->w) | |
2847 | continue; | |
2848 | ||
2849 | /* If overlay has a non-empty before-string, record it. */ | |
2850 | if (start == IT_CHARPOS (*it) | |
2851 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str)) | |
2852 | && XSTRING (str)->size) | |
2853 | RECORD_OVERLAY_STRING (overlay, str, 0); | |
2854 | ||
2855 | /* If overlay has a non-empty after-string, record it. */ | |
2856 | if (end == IT_CHARPOS (*it) | |
2857 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str)) | |
2858 | && XSTRING (str)->size) | |
2859 | RECORD_OVERLAY_STRING (overlay, str, 1); | |
2860 | } | |
2861 | ||
2862 | #undef RECORD_OVERLAY_STRING | |
2863 | ||
2864 | /* Sort entries. */ | |
2865 | qsort (entries, n, sizeof *entries, compare_overlay_entries); | |
2866 | ||
2867 | /* Record the total number of strings to process. */ | |
2868 | it->n_overlay_strings = n; | |
2869 | ||
2870 | /* IT->current.overlay_string_index is the number of overlay strings | |
2871 | that have already been consumed by IT. Copy some of the | |
2872 | remaining overlay strings to IT->overlay_strings. */ | |
2873 | i = 0; | |
2874 | j = it->current.overlay_string_index; | |
2875 | while (i < OVERLAY_STRING_CHUNK_SIZE && j < n) | |
2876 | it->overlay_strings[i++] = entries[j++].string; | |
2877 | ||
2878 | CHECK_IT (it); | |
2879 | } | |
2880 | ||
2881 | ||
2882 | /* Get the first chunk of overlay strings at IT's current buffer | |
2883 | position. Value is non-zero if at least one overlay string was | |
2884 | found. */ | |
2885 | ||
2886 | static int | |
2887 | get_overlay_strings (it) | |
2888 | struct it *it; | |
2889 | { | |
2890 | /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to | |
2891 | process. This fills IT->overlay_strings with strings, and sets | |
2892 | IT->n_overlay_strings to the total number of strings to process. | |
2893 | IT->pos.overlay_string_index has to be set temporarily to zero | |
2894 | because load_overlay_strings needs this; it must be set to -1 | |
2895 | when no overlay strings are found because a zero value would | |
2896 | indicate a position in the first overlay string. */ | |
2897 | it->current.overlay_string_index = 0; | |
2898 | load_overlay_strings (it); | |
2899 | ||
2900 | /* If we found overlay strings, set up IT to deliver display | |
2901 | elements from the first one. Otherwise set up IT to deliver | |
2902 | from current_buffer. */ | |
2903 | if (it->n_overlay_strings) | |
2904 | { | |
2905 | /* Make sure we know settings in current_buffer, so that we can | |
2906 | restore meaningful values when we're done with the overlay | |
2907 | strings. */ | |
2908 | compute_stop_pos (it); | |
2909 | xassert (it->face_id >= 0); | |
2910 | ||
2911 | /* Save IT's settings. They are restored after all overlay | |
2912 | strings have been processed. */ | |
2913 | xassert (it->sp == 0); | |
2914 | push_it (it); | |
2915 | ||
2916 | /* Set up IT to deliver display elements from the first overlay | |
2917 | string. */ | |
2918 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0; | |
2919 | it->stop_charpos = 0; | |
2920 | it->string = it->overlay_strings[0]; | |
2921 | it->multibyte_p = STRING_MULTIBYTE (it->string); | |
2922 | xassert (STRINGP (it->string)); | |
2923 | it->method = next_element_from_string; | |
2924 | } | |
2925 | else | |
2926 | { | |
2927 | it->string = Qnil; | |
2928 | it->current.overlay_string_index = -1; | |
2929 | it->method = next_element_from_buffer; | |
2930 | } | |
2931 | ||
2932 | CHECK_IT (it); | |
2933 | ||
2934 | /* Value is non-zero if we found at least one overlay string. */ | |
2935 | return STRINGP (it->string); | |
2936 | } | |
2937 | ||
2938 | ||
2939 | \f | |
2940 | /*********************************************************************** | |
2941 | Saving and restoring state | |
2942 | ***********************************************************************/ | |
2943 | ||
2944 | /* Save current settings of IT on IT->stack. Called, for example, | |
2945 | before setting up IT for an overlay string, to be able to restore | |
2946 | IT's settings to what they were after the overlay string has been | |
2947 | processed. */ | |
2948 | ||
2949 | static void | |
2950 | push_it (it) | |
2951 | struct it *it; | |
2952 | { | |
2953 | struct iterator_stack_entry *p; | |
2954 | ||
2955 | xassert (it->sp < 2); | |
2956 | p = it->stack + it->sp; | |
2957 | ||
2958 | p->stop_charpos = it->stop_charpos; | |
2959 | xassert (it->face_id >= 0); | |
2960 | p->face_id = it->face_id; | |
2961 | p->string = it->string; | |
2962 | p->pos = it->current; | |
2963 | p->end_charpos = it->end_charpos; | |
2964 | p->string_nchars = it->string_nchars; | |
2965 | p->area = it->area; | |
2966 | p->multibyte_p = it->multibyte_p; | |
2967 | p->space_width = it->space_width; | |
2968 | p->font_height = it->font_height; | |
2969 | p->voffset = it->voffset; | |
2970 | p->string_from_display_prop_p = it->string_from_display_prop_p; | |
2971 | ++it->sp; | |
2972 | } | |
2973 | ||
2974 | ||
2975 | /* Restore IT's settings from IT->stack. Called, for example, when no | |
2976 | more overlay strings must be processed, and we return to delivering | |
2977 | display elements from a buffer, or when the end of a string from a | |
2978 | `display' property is reached and we return to delivering display | |
2979 | elements from an overlay string, or from a buffer. */ | |
2980 | ||
2981 | static void | |
2982 | pop_it (it) | |
2983 | struct it *it; | |
2984 | { | |
2985 | struct iterator_stack_entry *p; | |
2986 | ||
2987 | xassert (it->sp > 0); | |
2988 | --it->sp; | |
2989 | p = it->stack + it->sp; | |
2990 | it->stop_charpos = p->stop_charpos; | |
2991 | it->face_id = p->face_id; | |
2992 | it->string = p->string; | |
2993 | it->current = p->pos; | |
2994 | it->end_charpos = p->end_charpos; | |
2995 | it->string_nchars = p->string_nchars; | |
2996 | it->area = p->area; | |
2997 | it->multibyte_p = p->multibyte_p; | |
2998 | it->space_width = p->space_width; | |
2999 | it->font_height = p->font_height; | |
3000 | it->voffset = p->voffset; | |
3001 | it->string_from_display_prop_p = p->string_from_display_prop_p; | |
3002 | } | |
3003 | ||
3004 | ||
3005 | \f | |
3006 | /*********************************************************************** | |
3007 | Moving over lines | |
3008 | ***********************************************************************/ | |
3009 | ||
3010 | /* Set IT's current position to the previous line start. */ | |
3011 | ||
3012 | static void | |
3013 | back_to_previous_line_start (it) | |
3014 | struct it *it; | |
3015 | { | |
3016 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it) - 1, -1); | |
3017 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3018 | } | |
3019 | ||
3020 | ||
3021 | /* Set IT's current position to the next line start. */ | |
3022 | ||
3023 | static void | |
3024 | forward_to_next_line_start (it) | |
3025 | struct it *it; | |
3026 | { | |
3027 | IT_CHARPOS (*it) = find_next_newline_no_quit (IT_CHARPOS (*it), 1); | |
3028 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3029 | } | |
3030 | ||
3031 | ||
3032 | /* Set IT's current position to the previous visible line start. Skip | |
3033 | invisible text that is so either due to text properties or due to | |
3034 | selective display. Caution: this does not change IT->current_x and | |
3035 | IT->hpos. */ | |
3036 | ||
3037 | static void | |
3038 | back_to_previous_visible_line_start (it) | |
3039 | struct it *it; | |
3040 | { | |
3041 | int visible_p = 0; | |
3042 | ||
3043 | /* Go back one newline if not on BEGV already. */ | |
3044 | if (IT_CHARPOS (*it) > BEGV) | |
3045 | back_to_previous_line_start (it); | |
3046 | ||
3047 | /* Move over lines that are invisible because of selective display | |
3048 | or text properties. */ | |
3049 | while (IT_CHARPOS (*it) > BEGV | |
3050 | && !visible_p) | |
3051 | { | |
3052 | visible_p = 1; | |
3053 | ||
3054 | /* If selective > 0, then lines indented more than that values | |
3055 | are invisible. */ | |
3056 | if (it->selective > 0 | |
3057 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3058 | it->selective)) | |
3059 | visible_p = 0; | |
5f5c8ee5 GM |
3060 | else |
3061 | { | |
3062 | Lisp_Object prop; | |
3063 | ||
3064 | prop = Fget_char_property (IT_CHARPOS (*it), Qinvisible, it->window); | |
3065 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
3066 | visible_p = 0; | |
3067 | } | |
5f5c8ee5 GM |
3068 | |
3069 | /* Back one more newline if the current one is invisible. */ | |
3070 | if (!visible_p) | |
3071 | back_to_previous_line_start (it); | |
3072 | } | |
3073 | ||
3074 | xassert (IT_CHARPOS (*it) >= BEGV); | |
3075 | xassert (IT_CHARPOS (*it) == BEGV | |
3076 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3077 | CHECK_IT (it); | |
3078 | } | |
3079 | ||
3080 | ||
3081 | /* Reseat iterator IT at the previous visible line start. Skip | |
3082 | invisible text that is so either due to text properties or due to | |
3083 | selective display. At the end, update IT's overlay information, | |
3084 | face information etc. */ | |
3085 | ||
3086 | static void | |
3087 | reseat_at_previous_visible_line_start (it) | |
3088 | struct it *it; | |
3089 | { | |
3090 | back_to_previous_visible_line_start (it); | |
3091 | reseat (it, it->current.pos, 1); | |
3092 | CHECK_IT (it); | |
3093 | } | |
3094 | ||
3095 | ||
3096 | /* Reseat iterator IT on the next visible line start in the current | |
312246d1 GM |
3097 | buffer. ON_NEWLINE_P non-zero means position IT on the newline |
3098 | preceding the line start. Skip over invisible text that is so | |
3099 | because of selective display. Compute faces, overlays etc at the | |
3100 | new position. Note that this function does not skip over text that | |
3101 | is invisible because of text properties. */ | |
5f5c8ee5 GM |
3102 | |
3103 | static void | |
312246d1 | 3104 | reseat_at_next_visible_line_start (it, on_newline_p) |
5f5c8ee5 | 3105 | struct it *it; |
312246d1 | 3106 | int on_newline_p; |
5f5c8ee5 GM |
3107 | { |
3108 | /* Restore the buffer position when currently not delivering display | |
3109 | elements from the current buffer. This is the case, for example, | |
3110 | when called at the end of a truncated overlay string. */ | |
3111 | while (it->sp) | |
3112 | pop_it (it); | |
3113 | it->method = next_element_from_buffer; | |
3114 | ||
3115 | /* Otherwise, scan_buffer would not work. */ | |
3116 | if (IT_CHARPOS (*it) < ZV) | |
3117 | { | |
3118 | /* If on a newline, advance past it. Otherwise, find the next | |
3119 | newline which automatically gives us the position following | |
3120 | the newline. */ | |
3121 | if (FETCH_BYTE (IT_BYTEPOS (*it)) == '\n') | |
3122 | { | |
3123 | ++IT_CHARPOS (*it); | |
3124 | ++IT_BYTEPOS (*it); | |
3125 | } | |
3126 | else | |
3127 | forward_to_next_line_start (it); | |
3128 | ||
3129 | /* We must either have reached the end of the buffer or end up | |
3130 | after a newline. */ | |
3131 | xassert (IT_CHARPOS (*it) == ZV | |
3132 | || FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n'); | |
3133 | ||
3134 | /* Skip over lines that are invisible because they are indented | |
3135 | more than the value of IT->selective. */ | |
3136 | if (it->selective > 0) | |
3137 | while (IT_CHARPOS (*it) < ZV | |
3138 | && indented_beyond_p (IT_CHARPOS (*it), IT_BYTEPOS (*it), | |
3139 | it->selective)) | |
3140 | forward_to_next_line_start (it); | |
312246d1 GM |
3141 | |
3142 | /* Position on the newline if we should. */ | |
13f19968 GM |
3143 | if (on_newline_p |
3144 | && IT_CHARPOS (*it) > BEGV | |
3145 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) == '\n') | |
312246d1 GM |
3146 | { |
3147 | --IT_CHARPOS (*it); | |
3148 | IT_BYTEPOS (*it) = CHAR_TO_BYTE (IT_CHARPOS (*it)); | |
3149 | } | |
5f5c8ee5 GM |
3150 | |
3151 | /* Set the iterator there. The 0 as the last parameter of | |
3152 | reseat means don't force a text property lookup. The lookup | |
3153 | is then only done if we've skipped past the iterator's | |
3154 | check_charpos'es. This optimization is important because | |
3155 | text property lookups tend to be expensive. */ | |
3156 | reseat (it, it->current.pos, 0); | |
3157 | } | |
3158 | ||
3159 | CHECK_IT (it); | |
3160 | } | |
3161 | ||
3162 | ||
3163 | \f | |
3164 | /*********************************************************************** | |
3165 | Changing an iterator's position | |
3166 | ***********************************************************************/ | |
3167 | ||
3168 | /* Change IT's current position to POS in current_buffer. If FORCE_P | |
3169 | is non-zero, always check for text properties at the new position. | |
3170 | Otherwise, text properties are only looked up if POS >= | |
3171 | IT->check_charpos of a property. */ | |
3172 | ||
3173 | static void | |
3174 | reseat (it, pos, force_p) | |
3175 | struct it *it; | |
3176 | struct text_pos pos; | |
3177 | int force_p; | |
3178 | { | |
3179 | int original_pos = IT_CHARPOS (*it); | |
3180 | ||
3181 | reseat_1 (it, pos, 0); | |
3182 | ||
3183 | /* Determine where to check text properties. Avoid doing it | |
3184 | where possible because text property lookup is very expensive. */ | |
3185 | if (force_p | |
3186 | || CHARPOS (pos) > it->stop_charpos | |
3187 | || CHARPOS (pos) < original_pos) | |
3188 | handle_stop (it); | |
3189 | ||
3190 | CHECK_IT (it); | |
3191 | } | |
3192 | ||
3193 | ||
3194 | /* Change IT's buffer position to POS. SET_STOP_P non-zero means set | |
3195 | IT->stop_pos to POS, also. */ | |
3196 | ||
3197 | static void | |
3198 | reseat_1 (it, pos, set_stop_p) | |
3199 | struct it *it; | |
3200 | struct text_pos pos; | |
3201 | int set_stop_p; | |
3202 | { | |
3203 | /* Don't call this function when scanning a C string. */ | |
3204 | xassert (it->s == NULL); | |
3205 | ||
3206 | /* POS must be a reasonable value. */ | |
3207 | xassert (CHARPOS (pos) >= BEGV && CHARPOS (pos) <= ZV); | |
3208 | ||
3209 | it->current.pos = it->position = pos; | |
3210 | XSETBUFFER (it->object, current_buffer); | |
3211 | it->dpvec = NULL; | |
3212 | it->current.dpvec_index = -1; | |
3213 | it->current.overlay_string_index = -1; | |
3214 | IT_STRING_CHARPOS (*it) = -1; | |
3215 | IT_STRING_BYTEPOS (*it) = -1; | |
3216 | it->string = Qnil; | |
3217 | it->method = next_element_from_buffer; | |
3218 | it->sp = 0; | |
3219 | ||
3220 | if (set_stop_p) | |
3221 | it->stop_charpos = CHARPOS (pos); | |
3222 | } | |
3223 | ||
3224 | ||
3225 | /* Set up IT for displaying a string, starting at CHARPOS in window W. | |
3226 | If S is non-null, it is a C string to iterate over. Otherwise, | |
3227 | STRING gives a Lisp string to iterate over. | |
3228 | ||
3229 | If PRECISION > 0, don't return more then PRECISION number of | |
3230 | characters from the string. | |
3231 | ||
3232 | If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH | |
3233 | characters have been returned. FIELD_WIDTH < 0 means an infinite | |
3234 | field width. | |
3235 | ||
3236 | MULTIBYTE = 0 means disable processing of multibyte characters, | |
3237 | MULTIBYTE > 0 means enable it, | |
3238 | MULTIBYTE < 0 means use IT->multibyte_p. | |
3239 | ||
3240 | IT must be initialized via a prior call to init_iterator before | |
3241 | calling this function. */ | |
3242 | ||
3243 | static void | |
3244 | reseat_to_string (it, s, string, charpos, precision, field_width, multibyte) | |
3245 | struct it *it; | |
3246 | unsigned char *s; | |
3247 | Lisp_Object string; | |
3248 | int charpos; | |
3249 | int precision, field_width, multibyte; | |
3250 | { | |
3251 | /* No region in strings. */ | |
3252 | it->region_beg_charpos = it->region_end_charpos = -1; | |
3253 | ||
3254 | /* No text property checks performed by default, but see below. */ | |
3255 | it->stop_charpos = -1; | |
3256 | ||
3257 | /* Set iterator position and end position. */ | |
3258 | bzero (&it->current, sizeof it->current); | |
3259 | it->current.overlay_string_index = -1; | |
3260 | it->current.dpvec_index = -1; | |
3261 | it->charset = CHARSET_ASCII; | |
3262 | xassert (charpos >= 0); | |
3263 | ||
3264 | /* Use the setting of MULTIBYTE if specified. */ | |
3265 | if (multibyte >= 0) | |
3266 | it->multibyte_p = multibyte > 0; | |
3267 | ||
3268 | if (s == NULL) | |
3269 | { | |
3270 | xassert (STRINGP (string)); | |
3271 | it->string = string; | |
3272 | it->s = NULL; | |
3273 | it->end_charpos = it->string_nchars = XSTRING (string)->size; | |
3274 | it->method = next_element_from_string; | |
3275 | it->current.string_pos = string_pos (charpos, string); | |
3276 | } | |
3277 | else | |
3278 | { | |
3279 | it->s = s; | |
3280 | it->string = Qnil; | |
3281 | ||
3282 | /* Note that we use IT->current.pos, not it->current.string_pos, | |
3283 | for displaying C strings. */ | |
3284 | IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = -1; | |
3285 | if (it->multibyte_p) | |
3286 | { | |
3287 | it->current.pos = c_string_pos (charpos, s, 1); | |
3288 | it->end_charpos = it->string_nchars = number_of_chars (s, 1); | |
3289 | } | |
3290 | else | |
3291 | { | |
3292 | IT_CHARPOS (*it) = IT_BYTEPOS (*it) = charpos; | |
3293 | it->end_charpos = it->string_nchars = strlen (s); | |
3294 | } | |
3295 | ||
3296 | it->method = next_element_from_c_string; | |
3297 | } | |
3298 | ||
3299 | /* PRECISION > 0 means don't return more than PRECISION characters | |
3300 | from the string. */ | |
3301 | if (precision > 0 && it->end_charpos - charpos > precision) | |
3302 | it->end_charpos = it->string_nchars = charpos + precision; | |
3303 | ||
3304 | /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH | |
3305 | characters have been returned. FIELD_WIDTH == 0 means don't pad, | |
3306 | FIELD_WIDTH < 0 means infinite field width. This is useful for | |
3307 | padding with `-' at the end of a mode line. */ | |
3308 | if (field_width < 0) | |
3309 | field_width = INFINITY; | |
3310 | if (field_width > it->end_charpos - charpos) | |
3311 | it->end_charpos = charpos + field_width; | |
3312 | ||
3313 | /* Use the standard display table for displaying strings. */ | |
3314 | if (DISP_TABLE_P (Vstandard_display_table)) | |
3315 | it->dp = XCHAR_TABLE (Vstandard_display_table); | |
3316 | ||
3317 | it->stop_charpos = charpos; | |
3318 | CHECK_IT (it); | |
3319 | } | |
3320 | ||
3321 | ||
3322 | \f | |
3323 | /*********************************************************************** | |
3324 | Iteration | |
3325 | ***********************************************************************/ | |
3326 | ||
3327 | /* Load IT's display element fields with information about the next | |
3328 | display element from the current position of IT. Value is zero if | |
3329 | end of buffer (or C string) is reached. */ | |
3330 | ||
3331 | int | |
3332 | get_next_display_element (it) | |
3333 | struct it *it; | |
3334 | { | |
3335 | /* Non-zero means that we found an display element. Zero means that | |
3336 | we hit the end of what we iterate over. Performance note: the | |
3337 | function pointer `method' used here turns out to be faster than | |
3338 | using a sequence of if-statements. */ | |
3339 | int success_p = (*it->method) (it); | |
3340 | int charset; | |
3341 | ||
3342 | if (it->what == IT_CHARACTER) | |
3343 | { | |
3344 | /* Map via display table or translate control characters. | |
3345 | IT->c, IT->len etc. have been set to the next character by | |
3346 | the function call above. If we have a display table, and it | |
3347 | contains an entry for IT->c, translate it. Don't do this if | |
3348 | IT->c itself comes from a display table, otherwise we could | |
3349 | end up in an infinite recursion. (An alternative could be to | |
3350 | count the recursion depth of this function and signal an | |
3351 | error when a certain maximum depth is reached.) Is it worth | |
3352 | it? */ | |
3353 | if (success_p && it->dpvec == NULL) | |
3354 | { | |
3355 | Lisp_Object dv; | |
3356 | ||
3357 | if (it->dp | |
3358 | && (dv = DISP_CHAR_VECTOR (it->dp, it->c), | |
3359 | VECTORP (dv))) | |
3360 | { | |
3361 | struct Lisp_Vector *v = XVECTOR (dv); | |
3362 | ||
3363 | /* Return the first character from the display table | |
3364 | entry, if not empty. If empty, don't display the | |
3365 | current character. */ | |
3366 | if (v->size) | |
3367 | { | |
3368 | it->dpvec_char_len = it->len; | |
3369 | it->dpvec = v->contents; | |
3370 | it->dpend = v->contents + v->size; | |
3371 | it->current.dpvec_index = 0; | |
3372 | it->method = next_element_from_display_vector; | |
3373 | } | |
3374 | ||
3375 | success_p = get_next_display_element (it); | |
3376 | } | |
3377 | ||
3378 | /* Translate control characters into `\003' or `^C' form. | |
3379 | Control characters coming from a display table entry are | |
3380 | currently not translated because we use IT->dpvec to hold | |
3381 | the translation. This could easily be changed but I | |
197516c2 KH |
3382 | don't believe that it is worth doing. |
3383 | ||
3384 | Non-printable multibyte characters are also translated | |
3385 | octal form. */ | |
5f5c8ee5 GM |
3386 | else if ((it->c < ' ' |
3387 | && (it->area != TEXT_AREA | |
c6e89d6c | 3388 | || (it->c != '\n' && it->c != '\t'))) |
54c85a23 | 3389 | || (it->c >= 127 |
197516c2 KH |
3390 | && it->len == 1) |
3391 | || !CHAR_PRINTABLE_P (it->c)) | |
5f5c8ee5 GM |
3392 | { |
3393 | /* IT->c is a control character which must be displayed | |
3394 | either as '\003' or as `^C' where the '\\' and '^' | |
3395 | can be defined in the display table. Fill | |
3396 | IT->ctl_chars with glyphs for what we have to | |
3397 | display. Then, set IT->dpvec to these glyphs. */ | |
3398 | GLYPH g; | |
3399 | ||
54c85a23 | 3400 | if (it->c < 128 && it->ctl_arrow_p) |
5f5c8ee5 GM |
3401 | { |
3402 | /* Set IT->ctl_chars[0] to the glyph for `^'. */ | |
3403 | if (it->dp | |
3404 | && INTEGERP (DISP_CTRL_GLYPH (it->dp)) | |
3405 | && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it->dp)))) | |
3406 | g = XINT (DISP_CTRL_GLYPH (it->dp)); | |
3407 | else | |
3408 | g = FAST_MAKE_GLYPH ('^', 0); | |
3409 | XSETINT (it->ctl_chars[0], g); | |
3410 | ||
3411 | g = FAST_MAKE_GLYPH (it->c ^ 0100, 0); | |
3412 | XSETINT (it->ctl_chars[1], g); | |
3413 | ||
3414 | /* Set up IT->dpvec and return first character from it. */ | |
3415 | it->dpvec_char_len = it->len; | |
3416 | it->dpvec = it->ctl_chars; | |
3417 | it->dpend = it->dpvec + 2; | |
3418 | it->current.dpvec_index = 0; | |
3419 | it->method = next_element_from_display_vector; | |
3420 | get_next_display_element (it); | |
3421 | } | |
3422 | else | |
3423 | { | |
260a86a0 KH |
3424 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
3425 | int len = CHAR_STRING (it->c, str); | |
197516c2 KH |
3426 | int i; |
3427 | GLYPH escape_glyph; | |
3428 | ||
5f5c8ee5 GM |
3429 | /* Set IT->ctl_chars[0] to the glyph for `\\'. */ |
3430 | if (it->dp | |
3431 | && INTEGERP (DISP_ESCAPE_GLYPH (it->dp)) | |
3432 | && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it->dp)))) | |
197516c2 | 3433 | escape_glyph = XFASTINT (DISP_ESCAPE_GLYPH (it->dp)); |
5f5c8ee5 | 3434 | else |
197516c2 KH |
3435 | escape_glyph = FAST_MAKE_GLYPH ('\\', 0); |
3436 | ||
3437 | for (i = 0; i < len; i++) | |
3438 | { | |
3439 | XSETINT (it->ctl_chars[i * 4], escape_glyph); | |
3440 | /* Insert three more glyphs into IT->ctl_chars for | |
3441 | the octal display of the character. */ | |
3442 | g = FAST_MAKE_GLYPH (((str[i] >> 6) & 7) + '0', 0); | |
3443 | XSETINT (it->ctl_chars[i * 4 + 1], g); | |
3444 | g = FAST_MAKE_GLYPH (((str[i] >> 3) & 7) + '0', 0); | |
3445 | XSETINT (it->ctl_chars[i * 4 + 2], g); | |
3446 | g = FAST_MAKE_GLYPH ((str[i] & 7) + '0', 0); | |
3447 | XSETINT (it->ctl_chars[i * 4 + 3], g); | |
3448 | } | |
5f5c8ee5 GM |
3449 | |
3450 | /* Set up IT->dpvec and return the first character | |
3451 | from it. */ | |
3452 | it->dpvec_char_len = it->len; | |
3453 | it->dpvec = it->ctl_chars; | |
197516c2 | 3454 | it->dpend = it->dpvec + len * 4; |
5f5c8ee5 GM |
3455 | it->current.dpvec_index = 0; |
3456 | it->method = next_element_from_display_vector; | |
3457 | get_next_display_element (it); | |
3458 | } | |
3459 | } | |
3460 | } | |
3461 | ||
3462 | /* Adjust face id if charset changes. There are no charset | |
3463 | changes in unibyte text because Emacs' charsets are not | |
3464 | applicable there. */ | |
3465 | if (it->multibyte_p | |
3466 | && success_p | |
3467 | && (charset = CHAR_CHARSET (it->c), | |
3468 | charset != it->charset)) | |
3469 | { | |
3470 | it->charset = charset; | |
3471 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, charset); | |
3472 | } | |
3473 | } | |
3474 | ||
3475 | /* Is this character the last one of a run of characters with | |
3476 | box? If yes, set IT->end_of_box_run_p to 1. */ | |
3477 | if (it->face_box_p | |
3478 | && it->s == NULL) | |
3479 | { | |
3480 | int face_id; | |
3481 | struct face *face; | |
3482 | ||
3483 | it->end_of_box_run_p | |
3484 | = ((face_id = face_after_it_pos (it), | |
3485 | face_id != it->face_id) | |
3486 | && (face = FACE_FROM_ID (it->f, face_id), | |
3487 | face->box == FACE_NO_BOX)); | |
3488 | } | |
3489 | ||
3490 | /* Value is 0 if end of buffer or string reached. */ | |
3491 | return success_p; | |
3492 | } | |
3493 | ||
3494 | ||
3495 | /* Move IT to the next display element. | |
3496 | ||
3497 | Functions get_next_display_element and set_iterator_to_next are | |
3498 | separate because I find this arrangement easier to handle than a | |
3499 | get_next_display_element function that also increments IT's | |
3500 | position. The way it is we can first look at an iterator's current | |
3501 | display element, decide whether it fits on a line, and if it does, | |
3502 | increment the iterator position. The other way around we probably | |
3503 | would either need a flag indicating whether the iterator has to be | |
3504 | incremented the next time, or we would have to implement a | |
3505 | decrement position function which would not be easy to write. */ | |
3506 | ||
3507 | void | |
3508 | set_iterator_to_next (it) | |
3509 | struct it *it; | |
3510 | { | |
3511 | if (it->method == next_element_from_buffer) | |
3512 | { | |
3513 | /* The current display element of IT is a character from | |
3514 | current_buffer. Advance in the buffer, and maybe skip over | |
3515 | invisible lines that are so because of selective display. */ | |
3516 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
312246d1 | 3517 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
3518 | else |
3519 | { | |
3520 | xassert (it->len != 0); | |
3521 | IT_BYTEPOS (*it) += it->len; | |
3522 | IT_CHARPOS (*it) += 1; | |
3523 | xassert (IT_BYTEPOS (*it) == CHAR_TO_BYTE (IT_CHARPOS (*it))); | |
3524 | } | |
3525 | } | |
260a86a0 KH |
3526 | else if (it->method == next_element_from_composition) |
3527 | { | |
3528 | xassert (it->cmp_id >= 0 && it ->cmp_id < n_compositions); | |
3529 | if (STRINGP (it->string)) | |
3530 | { | |
3531 | IT_STRING_BYTEPOS (*it) += it->len; | |
3532 | IT_STRING_CHARPOS (*it) += it->cmp_len; | |
3533 | it->method = next_element_from_string; | |
3534 | goto consider_string_end; | |
3535 | } | |
3536 | else | |
3537 | { | |
3538 | IT_BYTEPOS (*it) += it->len; | |
3539 | IT_CHARPOS (*it) += it->cmp_len; | |
3540 | it->method = next_element_from_buffer; | |
3541 | } | |
3542 | } | |
5f5c8ee5 GM |
3543 | else if (it->method == next_element_from_c_string) |
3544 | { | |
3545 | /* Current display element of IT is from a C string. */ | |
3546 | IT_BYTEPOS (*it) += it->len; | |
3547 | IT_CHARPOS (*it) += 1; | |
3548 | } | |
3549 | else if (it->method == next_element_from_display_vector) | |
3550 | { | |
3551 | /* Current display element of IT is from a display table entry. | |
3552 | Advance in the display table definition. Reset it to null if | |
3553 | end reached, and continue with characters from buffers/ | |
3554 | strings. */ | |
3555 | ++it->current.dpvec_index; | |
286bcbc9 GM |
3556 | |
3557 | /* Restore face and charset of the iterator to what they were | |
3558 | before the display vector entry (these entries may contain | |
3559 | faces, and of course characters of different charsets). */ | |
5f5c8ee5 | 3560 | it->face_id = it->saved_face_id; |
286bcbc9 GM |
3561 | it->charset = FACE_FROM_ID (it->f, it->face_id)->charset; |
3562 | ||
5f5c8ee5 GM |
3563 | if (it->dpvec + it->current.dpvec_index == it->dpend) |
3564 | { | |
3565 | if (it->s) | |
3566 | it->method = next_element_from_c_string; | |
3567 | else if (STRINGP (it->string)) | |
3568 | it->method = next_element_from_string; | |
3569 | else | |
3570 | it->method = next_element_from_buffer; | |
3571 | ||
3572 | it->dpvec = NULL; | |
3573 | it->current.dpvec_index = -1; | |
3574 | ||
312246d1 GM |
3575 | /* Skip over characters which were displayed via IT->dpvec. */ |
3576 | if (it->dpvec_char_len < 0) | |
3577 | reseat_at_next_visible_line_start (it, 1); | |
3578 | else if (it->dpvec_char_len > 0) | |
5f5c8ee5 GM |
3579 | { |
3580 | it->len = it->dpvec_char_len; | |
3581 | set_iterator_to_next (it); | |
3582 | } | |
3583 | } | |
3584 | } | |
3585 | else if (it->method == next_element_from_string) | |
3586 | { | |
3587 | /* Current display element is a character from a Lisp string. */ | |
3588 | xassert (it->s == NULL && STRINGP (it->string)); | |
3589 | IT_STRING_BYTEPOS (*it) += it->len; | |
3590 | IT_STRING_CHARPOS (*it) += 1; | |
3591 | ||
3592 | consider_string_end: | |
3593 | ||
3594 | if (it->current.overlay_string_index >= 0) | |
3595 | { | |
3596 | /* IT->string is an overlay string. Advance to the | |
3597 | next, if there is one. */ | |
3598 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3599 | next_overlay_string (it); | |
3600 | } | |
3601 | else | |
3602 | { | |
3603 | /* IT->string is not an overlay string. If we reached | |
3604 | its end, and there is something on IT->stack, proceed | |
3605 | with what is on the stack. This can be either another | |
3606 | string, this time an overlay string, or a buffer. */ | |
3607 | if (IT_STRING_CHARPOS (*it) == XSTRING (it->string)->size | |
3608 | && it->sp > 0) | |
3609 | { | |
3610 | pop_it (it); | |
3611 | if (!STRINGP (it->string)) | |
3612 | it->method = next_element_from_buffer; | |
3613 | } | |
3614 | } | |
3615 | } | |
3616 | else if (it->method == next_element_from_image | |
3617 | || it->method == next_element_from_stretch) | |
3618 | { | |
3619 | /* The position etc with which we have to proceed are on | |
3620 | the stack. The position may be at the end of a string, | |
3621 | if the `display' property takes up the whole string. */ | |
3622 | pop_it (it); | |
3623 | it->image_id = 0; | |
3624 | if (STRINGP (it->string)) | |
3625 | { | |
3626 | it->method = next_element_from_string; | |
3627 | goto consider_string_end; | |
3628 | } | |
3629 | else | |
3630 | it->method = next_element_from_buffer; | |
3631 | } | |
3632 | else | |
3633 | /* There are no other methods defined, so this should be a bug. */ | |
3634 | abort (); | |
3635 | ||
3636 | /* Reset flags indicating start and end of a sequence of | |
3637 | characters with box. */ | |
3638 | it->start_of_box_run_p = it->end_of_box_run_p = 0; | |
3639 | ||
3640 | xassert (it->method != next_element_from_string | |
3641 | || (STRINGP (it->string) | |
3642 | && IT_STRING_CHARPOS (*it) >= 0)); | |
3643 | } | |
3644 | ||
3645 | ||
3646 | /* Load IT's display element fields with information about the next | |
3647 | display element which comes from a display table entry or from the | |
3648 | result of translating a control character to one of the forms `^C' | |
3649 | or `\003'. IT->dpvec holds the glyphs to return as characters. */ | |
3650 | ||
3651 | static int | |
3652 | next_element_from_display_vector (it) | |
3653 | struct it *it; | |
3654 | { | |
3655 | /* Precondition. */ | |
3656 | xassert (it->dpvec && it->current.dpvec_index >= 0); | |
3657 | ||
3658 | /* Remember the current face id in case glyphs specify faces. | |
3659 | IT's face is restored in set_iterator_to_next. */ | |
3660 | it->saved_face_id = it->face_id; | |
3661 | ||
3662 | if (INTEGERP (*it->dpvec) | |
3663 | && GLYPH_CHAR_VALID_P (XFASTINT (*it->dpvec))) | |
3664 | { | |
3665 | int lface_id; | |
3666 | GLYPH g; | |
3667 | ||
3668 | g = XFASTINT (it->dpvec[it->current.dpvec_index]); | |
3669 | it->c = FAST_GLYPH_CHAR (g); | |
3670 | it->len = CHAR_LEN (it->c); | |
3671 | ||
3672 | /* The entry may contain a face id to use. Such a face id is | |
3673 | the id of a Lisp face, not a realized face. A face id of | |
3674 | zero means no face. */ | |
3675 | lface_id = FAST_GLYPH_FACE (g); | |
3676 | if (lface_id) | |
3677 | { | |
3678 | int face_id = ascii_face_of_lisp_face (it->f, lface_id); | |
3679 | if (face_id >= 0) | |
3680 | { | |
3681 | it->face_id = face_id; | |
3682 | it->charset = CHARSET_ASCII; | |
3683 | } | |
3684 | } | |
3685 | } | |
3686 | else | |
3687 | /* Display table entry is invalid. Return a space. */ | |
3688 | it->c = ' ', it->len = 1; | |
3689 | ||
3690 | /* Don't change position and object of the iterator here. They are | |
3691 | still the values of the character that had this display table | |
3692 | entry or was translated, and that's what we want. */ | |
3693 | it->what = IT_CHARACTER; | |
3694 | return 1; | |
3695 | } | |
3696 | ||
3697 | ||
3698 | /* Load IT with the next display element from Lisp string IT->string. | |
3699 | IT->current.string_pos is the current position within the string. | |
3700 | If IT->current.overlay_string_index >= 0, the Lisp string is an | |
3701 | overlay string. */ | |
3702 | ||
3703 | static int | |
3704 | next_element_from_string (it) | |
3705 | struct it *it; | |
3706 | { | |
3707 | struct text_pos position; | |
3708 | ||
3709 | xassert (STRINGP (it->string)); | |
3710 | xassert (IT_STRING_CHARPOS (*it) >= 0); | |
3711 | position = it->current.string_pos; | |
3712 | ||
3713 | /* Time to check for invisible text? */ | |
3714 | if (IT_STRING_CHARPOS (*it) < it->end_charpos | |
3715 | && IT_STRING_CHARPOS (*it) == it->stop_charpos) | |
3716 | { | |
3717 | handle_stop (it); | |
3718 | ||
3719 | /* Since a handler may have changed IT->method, we must | |
3720 | recurse here. */ | |
3721 | return get_next_display_element (it); | |
3722 | } | |
3723 | ||
3724 | if (it->current.overlay_string_index >= 0) | |
3725 | { | |
3726 | /* Get the next character from an overlay string. In overlay | |
3727 | strings, There is no field width or padding with spaces to | |
3728 | do. */ | |
3729 | if (IT_STRING_CHARPOS (*it) >= XSTRING (it->string)->size) | |
3730 | { | |
3731 | it->what = IT_EOB; | |
3732 | return 0; | |
3733 | } | |
3734 | else if (STRING_MULTIBYTE (it->string)) | |
3735 | { | |
3736 | int remaining = (STRING_BYTES (XSTRING (it->string)) | |
3737 | - IT_STRING_BYTEPOS (*it)); | |
3738 | unsigned char *s = (XSTRING (it->string)->data | |
3739 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3740 | it->c = string_char_and_length (s, remaining, &it->len); |
5f5c8ee5 GM |
3741 | } |
3742 | else | |
3743 | { | |
3744 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3745 | it->len = 1; | |
3746 | } | |
3747 | } | |
3748 | else | |
3749 | { | |
3750 | /* Get the next character from a Lisp string that is not an | |
3751 | overlay string. Such strings come from the mode line, for | |
3752 | example. We may have to pad with spaces, or truncate the | |
3753 | string. See also next_element_from_c_string. */ | |
3754 | if (IT_STRING_CHARPOS (*it) >= it->end_charpos) | |
3755 | { | |
3756 | it->what = IT_EOB; | |
3757 | return 0; | |
3758 | } | |
3759 | else if (IT_STRING_CHARPOS (*it) >= it->string_nchars) | |
3760 | { | |
3761 | /* Pad with spaces. */ | |
3762 | it->c = ' ', it->len = 1; | |
3763 | CHARPOS (position) = BYTEPOS (position) = -1; | |
3764 | } | |
3765 | else if (STRING_MULTIBYTE (it->string)) | |
3766 | { | |
3767 | int maxlen = (STRING_BYTES (XSTRING (it->string)) | |
3768 | - IT_STRING_BYTEPOS (*it)); | |
3769 | unsigned char *s = (XSTRING (it->string)->data | |
3770 | + IT_STRING_BYTEPOS (*it)); | |
4fdb80f2 | 3771 | it->c = string_char_and_length (s, maxlen, &it->len); |
5f5c8ee5 GM |
3772 | } |
3773 | else | |
3774 | { | |
3775 | it->c = XSTRING (it->string)->data[IT_STRING_BYTEPOS (*it)]; | |
3776 | it->len = 1; | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | /* Record what we have and where it came from. Note that we store a | |
3781 | buffer position in IT->position although it could arguably be a | |
3782 | string position. */ | |
3783 | it->what = IT_CHARACTER; | |
3784 | it->object = it->string; | |
3785 | it->position = position; | |
3786 | return 1; | |
3787 | } | |
3788 | ||
3789 | ||
3790 | /* Load IT with next display element from C string IT->s. | |
3791 | IT->string_nchars is the maximum number of characters to return | |
3792 | from the string. IT->end_charpos may be greater than | |
3793 | IT->string_nchars when this function is called, in which case we | |
3794 | may have to return padding spaces. Value is zero if end of string | |
3795 | reached, including padding spaces. */ | |
3796 | ||
3797 | static int | |
3798 | next_element_from_c_string (it) | |
3799 | struct it *it; | |
3800 | { | |
3801 | int success_p = 1; | |
3802 | ||
3803 | xassert (it->s); | |
3804 | it->what = IT_CHARACTER; | |
3805 | BYTEPOS (it->position) = CHARPOS (it->position) = 0; | |
3806 | it->object = Qnil; | |
3807 | ||
3808 | /* IT's position can be greater IT->string_nchars in case a field | |
3809 | width or precision has been specified when the iterator was | |
3810 | initialized. */ | |
3811 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3812 | { | |
3813 | /* End of the game. */ | |
3814 | it->what = IT_EOB; | |
3815 | success_p = 0; | |
3816 | } | |
3817 | else if (IT_CHARPOS (*it) >= it->string_nchars) | |
3818 | { | |
3819 | /* Pad with spaces. */ | |
3820 | it->c = ' ', it->len = 1; | |
3821 | BYTEPOS (it->position) = CHARPOS (it->position) = -1; | |
3822 | } | |
3823 | else if (it->multibyte_p) | |
3824 | { | |
3825 | /* Implementation note: The calls to strlen apparently aren't a | |
3826 | performance problem because there is no noticeable performance | |
3827 | difference between Emacs running in unibyte or multibyte mode. */ | |
3828 | int maxlen = strlen (it->s) - IT_BYTEPOS (*it); | |
4fdb80f2 GM |
3829 | it->c = string_char_and_length (it->s + IT_BYTEPOS (*it), |
3830 | maxlen, &it->len); | |
5f5c8ee5 GM |
3831 | } |
3832 | else | |
3833 | it->c = it->s[IT_BYTEPOS (*it)], it->len = 1; | |
3834 | ||
3835 | return success_p; | |
3836 | } | |
3837 | ||
3838 | ||
3839 | /* Set up IT to return characters from an ellipsis, if appropriate. | |
3840 | The definition of the ellipsis glyphs may come from a display table | |
3841 | entry. This function Fills IT with the first glyph from the | |
3842 | ellipsis if an ellipsis is to be displayed. */ | |
3843 | ||
13f19968 | 3844 | static int |
5f5c8ee5 GM |
3845 | next_element_from_ellipsis (it) |
3846 | struct it *it; | |
3847 | { | |
13f19968 | 3848 | if (it->selective_display_ellipsis_p) |
5f5c8ee5 | 3849 | { |
13f19968 GM |
3850 | if (it->dp && VECTORP (DISP_INVIS_VECTOR (it->dp))) |
3851 | { | |
3852 | /* Use the display table definition for `...'. Invalid glyphs | |
3853 | will be handled by the method returning elements from dpvec. */ | |
3854 | struct Lisp_Vector *v = XVECTOR (DISP_INVIS_VECTOR (it->dp)); | |
3855 | it->dpvec_char_len = it->len; | |
3856 | it->dpvec = v->contents; | |
3857 | it->dpend = v->contents + v->size; | |
3858 | it->current.dpvec_index = 0; | |
3859 | it->method = next_element_from_display_vector; | |
3860 | } | |
3861 | else | |
3862 | { | |
3863 | /* Use default `...' which is stored in default_invis_vector. */ | |
3864 | it->dpvec_char_len = it->len; | |
3865 | it->dpvec = default_invis_vector; | |
3866 | it->dpend = default_invis_vector + 3; | |
3867 | it->current.dpvec_index = 0; | |
3868 | it->method = next_element_from_display_vector; | |
3869 | } | |
5f5c8ee5 | 3870 | } |
13f19968 GM |
3871 | else |
3872 | reseat_at_next_visible_line_start (it, 1); | |
3873 | ||
3874 | return get_next_display_element (it); | |
5f5c8ee5 GM |
3875 | } |
3876 | ||
3877 | ||
3878 | /* Deliver an image display element. The iterator IT is already | |
3879 | filled with image information (done in handle_display_prop). Value | |
3880 | is always 1. */ | |
3881 | ||
3882 | ||
3883 | static int | |
3884 | next_element_from_image (it) | |
3885 | struct it *it; | |
3886 | { | |
3887 | it->what = IT_IMAGE; | |
3888 | return 1; | |
3889 | } | |
3890 | ||
3891 | ||
3892 | /* Fill iterator IT with next display element from a stretch glyph | |
3893 | property. IT->object is the value of the text property. Value is | |
3894 | always 1. */ | |
3895 | ||
3896 | static int | |
3897 | next_element_from_stretch (it) | |
3898 | struct it *it; | |
3899 | { | |
3900 | it->what = IT_STRETCH; | |
3901 | return 1; | |
3902 | } | |
3903 | ||
3904 | ||
3905 | /* Load IT with the next display element from current_buffer. Value | |
3906 | is zero if end of buffer reached. IT->stop_charpos is the next | |
3907 | position at which to stop and check for text properties or buffer | |
3908 | end. */ | |
3909 | ||
3910 | static int | |
3911 | next_element_from_buffer (it) | |
3912 | struct it *it; | |
3913 | { | |
3914 | int success_p = 1; | |
3915 | ||
3916 | /* Check this assumption, otherwise, we would never enter the | |
3917 | if-statement, below. */ | |
3918 | xassert (IT_CHARPOS (*it) >= BEGV | |
3919 | && IT_CHARPOS (*it) <= it->stop_charpos); | |
3920 | ||
3921 | if (IT_CHARPOS (*it) >= it->stop_charpos) | |
3922 | { | |
3923 | if (IT_CHARPOS (*it) >= it->end_charpos) | |
3924 | { | |
3925 | int overlay_strings_follow_p; | |
3926 | ||
3927 | /* End of the game, except when overlay strings follow that | |
3928 | haven't been returned yet. */ | |
3929 | if (it->overlay_strings_at_end_processed_p) | |
3930 | overlay_strings_follow_p = 0; | |
3931 | else | |
3932 | { | |
3933 | it->overlay_strings_at_end_processed_p = 1; | |
c880678e | 3934 | overlay_strings_follow_p = get_overlay_strings (it); |
5f5c8ee5 GM |
3935 | } |
3936 | ||
3937 | if (overlay_strings_follow_p) | |
3938 | success_p = get_next_display_element (it); | |
3939 | else | |
3940 | { | |
3941 | it->what = IT_EOB; | |
3942 | it->position = it->current.pos; | |
3943 | success_p = 0; | |
3944 | } | |
3945 | } | |
3946 | else | |
3947 | { | |
3948 | handle_stop (it); | |
3949 | return get_next_display_element (it); | |
3950 | } | |
3951 | } | |
3952 | else | |
3953 | { | |
3954 | /* No face changes, overlays etc. in sight, so just return a | |
3955 | character from current_buffer. */ | |
3956 | unsigned char *p; | |
3957 | ||
3958 | /* Maybe run the redisplay end trigger hook. Performance note: | |
3959 | This doesn't seem to cost measurable time. */ | |
3960 | if (it->redisplay_end_trigger_charpos | |
3961 | && it->glyph_row | |
3962 | && IT_CHARPOS (*it) >= it->redisplay_end_trigger_charpos) | |
3963 | run_redisplay_end_trigger_hook (it); | |
3964 | ||
3965 | /* Get the next character, maybe multibyte. */ | |
3966 | p = BYTE_POS_ADDR (IT_BYTEPOS (*it)); | |
260a86a0 | 3967 | if (it->multibyte_p && !ASCII_BYTE_P (*p)) |
5f5c8ee5 GM |
3968 | { |
3969 | int maxlen = ((IT_BYTEPOS (*it) >= GPT_BYTE ? ZV_BYTE : GPT_BYTE) | |
3970 | - IT_BYTEPOS (*it)); | |
4fdb80f2 | 3971 | it->c = string_char_and_length (p, maxlen, &it->len); |
5f5c8ee5 GM |
3972 | } |
3973 | else | |
3974 | it->c = *p, it->len = 1; | |
3975 | ||
3976 | /* Record what we have and where it came from. */ | |
3977 | it->what = IT_CHARACTER;; | |
3978 | it->object = it->w->buffer; | |
3979 | it->position = it->current.pos; | |
3980 | ||
3981 | /* Normally we return the character found above, except when we | |
3982 | really want to return an ellipsis for selective display. */ | |
3983 | if (it->selective) | |
3984 | { | |
3985 | if (it->c == '\n') | |
3986 | { | |
3987 | /* A value of selective > 0 means hide lines indented more | |
3988 | than that number of columns. */ | |
3989 | if (it->selective > 0 | |
3990 | && IT_CHARPOS (*it) + 1 < ZV | |
3991 | && indented_beyond_p (IT_CHARPOS (*it) + 1, | |
3992 | IT_BYTEPOS (*it) + 1, | |
3993 | it->selective)) | |
312246d1 | 3994 | { |
13f19968 | 3995 | success_p = next_element_from_ellipsis (it); |
312246d1 GM |
3996 | it->dpvec_char_len = -1; |
3997 | } | |
5f5c8ee5 GM |
3998 | } |
3999 | else if (it->c == '\r' && it->selective == -1) | |
4000 | { | |
4001 | /* A value of selective == -1 means that everything from the | |
4002 | CR to the end of the line is invisible, with maybe an | |
4003 | ellipsis displayed for it. */ | |
13f19968 | 4004 | success_p = next_element_from_ellipsis (it); |
312246d1 | 4005 | it->dpvec_char_len = -1; |
5f5c8ee5 GM |
4006 | } |
4007 | } | |
4008 | } | |
4009 | ||
4010 | /* Value is zero if end of buffer reached. */ | |
c880678e | 4011 | xassert (!success_p || it->what != IT_CHARACTER || it->len > 0); |
5f5c8ee5 GM |
4012 | return success_p; |
4013 | } | |
4014 | ||
4015 | ||
4016 | /* Run the redisplay end trigger hook for IT. */ | |
4017 | ||
4018 | static void | |
4019 | run_redisplay_end_trigger_hook (it) | |
4020 | struct it *it; | |
4021 | { | |
4022 | Lisp_Object args[3]; | |
4023 | ||
4024 | /* IT->glyph_row should be non-null, i.e. we should be actually | |
4025 | displaying something, or otherwise we should not run the hook. */ | |
4026 | xassert (it->glyph_row); | |
4027 | ||
4028 | /* Set up hook arguments. */ | |
4029 | args[0] = Qredisplay_end_trigger_functions; | |
4030 | args[1] = it->window; | |
4031 | XSETINT (args[2], it->redisplay_end_trigger_charpos); | |
4032 | it->redisplay_end_trigger_charpos = 0; | |
4033 | ||
4034 | /* Since we are *trying* to run these functions, don't try to run | |
4035 | them again, even if they get an error. */ | |
4036 | it->w->redisplay_end_trigger = Qnil; | |
4037 | Frun_hook_with_args (3, args); | |
4038 | ||
4039 | /* Notice if it changed the face of the character we are on. */ | |
4040 | handle_face_prop (it); | |
4041 | } | |
4042 | ||
4043 | ||
260a86a0 KH |
4044 | /* Deliver a composition display element. The iterator IT is already |
4045 | filled with composition information (done in | |
4046 | handle_composition_prop). Value is always 1. */ | |
4047 | ||
4048 | static int | |
4049 | next_element_from_composition (it) | |
4050 | struct it *it; | |
4051 | { | |
4052 | it->what = IT_COMPOSITION; | |
4053 | it->position = (STRINGP (it->string) | |
4054 | ? it->current.string_pos | |
4055 | : it->current.pos); | |
4056 | return 1; | |
4057 | } | |
4058 | ||
4059 | ||
5f5c8ee5 GM |
4060 | \f |
4061 | /*********************************************************************** | |
4062 | Moving an iterator without producing glyphs | |
4063 | ***********************************************************************/ | |
4064 | ||
4065 | /* Move iterator IT to a specified buffer or X position within one | |
4066 | line on the display without producing glyphs. | |
4067 | ||
4068 | Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X | |
4069 | whichever is reached first. | |
4070 | ||
4071 | TO_CHARPOS <= 0 means no TO_CHARPOS is specified. | |
4072 | ||
4073 | TO_X < 0 means that no TO_X is specified. TO_X is normally a value | |
4074 | 0 <= TO_X <= IT->last_visible_x. This means in particular, that | |
4075 | TO_X includes the amount by which a window is horizontally | |
4076 | scrolled. | |
4077 | ||
4078 | Value is | |
4079 | ||
4080 | MOVE_POS_MATCH_OR_ZV | |
4081 | - when TO_POS or ZV was reached. | |
4082 | ||
4083 | MOVE_X_REACHED | |
4084 | -when TO_X was reached before TO_POS or ZV were reached. | |
4085 | ||
4086 | MOVE_LINE_CONTINUED | |
4087 | - when we reached the end of the display area and the line must | |
4088 | be continued. | |
4089 | ||
4090 | MOVE_LINE_TRUNCATED | |
4091 | - when we reached the end of the display area and the line is | |
4092 | truncated. | |
4093 | ||
4094 | MOVE_NEWLINE_OR_CR | |
4095 | - when we stopped at a line end, i.e. a newline or a CR and selective | |
4096 | display is on. */ | |
4097 | ||
701552dd | 4098 | static enum move_it_result |
5f5c8ee5 GM |
4099 | move_it_in_display_line_to (it, to_charpos, to_x, op) |
4100 | struct it *it; | |
4101 | int to_charpos, to_x, op; | |
4102 | { | |
4103 | enum move_it_result result = MOVE_UNDEFINED; | |
4104 | struct glyph_row *saved_glyph_row; | |
4105 | ||
4106 | /* Don't produce glyphs in produce_glyphs. */ | |
4107 | saved_glyph_row = it->glyph_row; | |
4108 | it->glyph_row = NULL; | |
4109 | ||
5f5c8ee5 GM |
4110 | while (1) |
4111 | { | |
4112 | int x, i; | |
4113 | ||
4114 | /* Stop when ZV or TO_CHARPOS reached. */ | |
4115 | if (!get_next_display_element (it) | |
4116 | || ((op & MOVE_TO_POS) != 0 | |
4117 | && BUFFERP (it->object) | |
4118 | && IT_CHARPOS (*it) >= to_charpos)) | |
4119 | { | |
4120 | result = MOVE_POS_MATCH_OR_ZV; | |
4121 | break; | |
4122 | } | |
4123 | ||
4124 | /* The call to produce_glyphs will get the metrics of the | |
4125 | display element IT is loaded with. We record in x the | |
4126 | x-position before this display element in case it does not | |
4127 | fit on the line. */ | |
4128 | x = it->current_x; | |
4129 | PRODUCE_GLYPHS (it); | |
4130 | ||
4131 | if (it->area != TEXT_AREA) | |
4132 | { | |
4133 | set_iterator_to_next (it); | |
4134 | continue; | |
4135 | } | |
4136 | ||
4137 | /* The number of glyphs we get back in IT->nglyphs will normally | |
4138 | be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph | |
4139 | character on a terminal frame, or (iii) a line end. For the | |
4140 | second case, IT->nglyphs - 1 padding glyphs will be present | |
4141 | (on X frames, there is only one glyph produced for a | |
4142 | composite character. | |
4143 | ||
4144 | The behavior implemented below means, for continuation lines, | |
4145 | that as many spaces of a TAB as fit on the current line are | |
4146 | displayed there. For terminal frames, as many glyphs of a | |
4147 | multi-glyph character are displayed in the current line, too. | |
4148 | This is what the old redisplay code did, and we keep it that | |
4149 | way. Under X, the whole shape of a complex character must | |
4150 | fit on the line or it will be completely displayed in the | |
4151 | next line. | |
4152 | ||
4153 | Note that both for tabs and padding glyphs, all glyphs have | |
4154 | the same width. */ | |
4155 | if (it->nglyphs) | |
4156 | { | |
4157 | /* More than one glyph or glyph doesn't fit on line. All | |
4158 | glyphs have the same width. */ | |
4159 | int single_glyph_width = it->pixel_width / it->nglyphs; | |
4160 | int new_x; | |
4161 | ||
4162 | for (i = 0; i < it->nglyphs; ++i, x = new_x) | |
4163 | { | |
4164 | new_x = x + single_glyph_width; | |
4165 | ||
4166 | /* We want to leave anything reaching TO_X to the caller. */ | |
4167 | if ((op & MOVE_TO_X) && new_x > to_x) | |
4168 | { | |
4169 | it->current_x = x; | |
4170 | result = MOVE_X_REACHED; | |
4171 | break; | |
4172 | } | |
4173 | else if (/* Lines are continued. */ | |
4174 | !it->truncate_lines_p | |
4175 | && (/* And glyph doesn't fit on the line. */ | |
4176 | new_x > it->last_visible_x | |
4177 | /* Or it fits exactly and we're on a window | |
4178 | system frame. */ | |
4179 | || (new_x == it->last_visible_x | |
4180 | && FRAME_WINDOW_P (it->f)))) | |
4181 | { | |
4182 | if (/* IT->hpos == 0 means the very first glyph | |
4183 | doesn't fit on the line, e.g. a wide image. */ | |
4184 | it->hpos == 0 | |
4185 | || (new_x == it->last_visible_x | |
4186 | && FRAME_WINDOW_P (it->f))) | |
4187 | { | |
4188 | ++it->hpos; | |
4189 | it->current_x = new_x; | |
4190 | if (i == it->nglyphs - 1) | |
4191 | set_iterator_to_next (it); | |
4192 | } | |
4193 | else | |
4194 | it->current_x = x; | |
4195 | ||
4196 | result = MOVE_LINE_CONTINUED; | |
4197 | break; | |
4198 | } | |
4199 | else if (new_x > it->first_visible_x) | |
4200 | { | |
4201 | /* Glyph is visible. Increment number of glyphs that | |
4202 | would be displayed. */ | |
4203 | ++it->hpos; | |
4204 | } | |
4205 | else | |
4206 | { | |
4207 | /* Glyph is completely off the left margin of the display | |
4208 | area. Nothing to do. */ | |
4209 | } | |
4210 | } | |
4211 | ||
4212 | if (result != MOVE_UNDEFINED) | |
4213 | break; | |
4214 | } | |
4215 | else if ((op & MOVE_TO_X) && it->current_x >= to_x) | |
4216 | { | |
4217 | /* Stop when TO_X specified and reached. This check is | |
4218 | necessary here because of lines consisting of a line end, | |
4219 | only. The line end will not produce any glyphs and we | |
4220 | would never get MOVE_X_REACHED. */ | |
4221 | xassert (it->nglyphs == 0); | |
4222 | result = MOVE_X_REACHED; | |
4223 | break; | |
4224 | } | |
4225 | ||
4226 | /* Is this a line end? If yes, we're done. */ | |
4227 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
4228 | { | |
4229 | result = MOVE_NEWLINE_OR_CR; | |
4230 | break; | |
4231 | } | |
4232 | ||
4233 | /* The current display element has been consumed. Advance | |
4234 | to the next. */ | |
4235 | set_iterator_to_next (it); | |
4236 | ||
4237 | /* Stop if lines are truncated and IT's current x-position is | |
4238 | past the right edge of the window now. */ | |
4239 | if (it->truncate_lines_p | |
4240 | && it->current_x >= it->last_visible_x) | |
4241 | { | |
4242 | result = MOVE_LINE_TRUNCATED; | |
4243 | break; | |
4244 | } | |
4245 | } | |
4246 | ||
4247 | /* Restore the iterator settings altered at the beginning of this | |
4248 | function. */ | |
4249 | it->glyph_row = saved_glyph_row; | |
4250 | return result; | |
4251 | } | |
4252 | ||
4253 | ||
4254 | /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X, | |
4255 | TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See | |
4256 | the description of enum move_operation_enum. | |
4257 | ||
4258 | If TO_CHARPOS is in invisible text, e.g. a truncated part of a | |
4259 | screen line, this function will set IT to the next position > | |
4260 | TO_CHARPOS. */ | |
4261 | ||
4262 | void | |
4263 | move_it_to (it, to_charpos, to_x, to_y, to_vpos, op) | |
4264 | struct it *it; | |
4265 | int to_charpos, to_x, to_y, to_vpos; | |
4266 | int op; | |
4267 | { | |
4268 | enum move_it_result skip, skip2 = MOVE_X_REACHED; | |
4269 | int line_height; | |
4270 | ||
5f5c8ee5 GM |
4271 | while (1) |
4272 | { | |
4273 | if (op & MOVE_TO_VPOS) | |
4274 | { | |
4275 | /* If no TO_CHARPOS and no TO_X specified, stop at the | |
4276 | start of the line TO_VPOS. */ | |
4277 | if ((op & (MOVE_TO_X | MOVE_TO_POS)) == 0) | |
4278 | { | |
4279 | if (it->vpos == to_vpos) | |
4280 | break; | |
4281 | skip = move_it_in_display_line_to (it, -1, -1, 0); | |
4282 | } | |
4283 | else | |
4284 | { | |
4285 | /* TO_VPOS >= 0 means stop at TO_X in the line at | |
4286 | TO_VPOS, or at TO_POS, whichever comes first. */ | |
4287 | skip = move_it_in_display_line_to (it, to_charpos, to_x, op); | |
4288 | ||
4289 | if (skip == MOVE_POS_MATCH_OR_ZV || it->vpos == to_vpos) | |
4290 | break; | |
4291 | else if (skip == MOVE_X_REACHED && it->vpos != to_vpos) | |
4292 | { | |
4293 | /* We have reached TO_X but not in the line we want. */ | |
4294 | skip = move_it_in_display_line_to (it, to_charpos, | |
4295 | -1, MOVE_TO_POS); | |
4296 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4297 | break; | |
4298 | } | |
4299 | } | |
4300 | } | |
4301 | else if (op & MOVE_TO_Y) | |
4302 | { | |
4303 | struct it it_backup; | |
4304 | int done_p; | |
4305 | ||
4306 | /* TO_Y specified means stop at TO_X in the line containing | |
4307 | TO_Y---or at TO_CHARPOS if this is reached first. The | |
4308 | problem is that we can't really tell whether the line | |
4309 | contains TO_Y before we have completely scanned it, and | |
4310 | this may skip past TO_X. What we do is to first scan to | |
4311 | TO_X. | |
4312 | ||
4313 | If TO_X is not specified, use a TO_X of zero. The reason | |
4314 | is to make the outcome of this function more predictable. | |
4315 | If we didn't use TO_X == 0, we would stop at the end of | |
4316 | the line which is probably not what a caller would expect | |
4317 | to happen. */ | |
4318 | skip = move_it_in_display_line_to (it, to_charpos, | |
4319 | ((op & MOVE_TO_X) | |
4320 | ? to_x : 0), | |
4321 | (MOVE_TO_X | |
4322 | | (op & MOVE_TO_POS))); | |
4323 | ||
4324 | /* If TO_CHARPOS is reached or ZV, we don't have to do more. */ | |
4325 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4326 | break; | |
4327 | ||
4328 | /* If TO_X was reached, we would like to know whether TO_Y | |
4329 | is in the line. This can only be said if we know the | |
4330 | total line height which requires us to scan the rest of | |
4331 | the line. */ | |
4332 | done_p = 0; | |
4333 | if (skip == MOVE_X_REACHED) | |
4334 | { | |
4335 | it_backup = *it; | |
4336 | skip2 = move_it_in_display_line_to (it, to_charpos, -1, | |
4337 | op & MOVE_TO_POS); | |
4338 | } | |
4339 | ||
4340 | /* Now, decide whether TO_Y is in this line. */ | |
4341 | line_height = it->max_ascent + it->max_descent; | |
4342 | ||
4343 | if (to_y >= it->current_y | |
4344 | && to_y < it->current_y + line_height) | |
4345 | { | |
4346 | if (skip == MOVE_X_REACHED) | |
4347 | /* If TO_Y is in this line and TO_X was reached above, | |
4348 | we scanned too far. We have to restore IT's settings | |
4349 | to the ones before skipping. */ | |
4350 | *it = it_backup; | |
4351 | done_p = 1; | |
4352 | } | |
4353 | else if (skip == MOVE_X_REACHED) | |
4354 | { | |
4355 | skip = skip2; | |
4356 | if (skip == MOVE_POS_MATCH_OR_ZV) | |
4357 | done_p = 1; | |
4358 | } | |
4359 | ||
4360 | if (done_p) | |
4361 | break; | |
4362 | } | |
4363 | else | |
4364 | skip = move_it_in_display_line_to (it, to_charpos, -1, MOVE_TO_POS); | |
4365 | ||
4366 | switch (skip) | |
4367 | { | |
4368 | case MOVE_POS_MATCH_OR_ZV: | |
4369 | return; | |
4370 | ||
4371 | case MOVE_NEWLINE_OR_CR: | |
4372 | set_iterator_to_next (it); | |
4373 | it->continuation_lines_width = 0; | |
4374 | break; | |
4375 | ||
4376 | case MOVE_LINE_TRUNCATED: | |
4377 | it->continuation_lines_width = 0; | |
312246d1 | 4378 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
4379 | if ((op & MOVE_TO_POS) != 0 |
4380 | && IT_CHARPOS (*it) > to_charpos) | |
4381 | goto out; | |
4382 | break; | |
4383 | ||
4384 | case MOVE_LINE_CONTINUED: | |
4385 | it->continuation_lines_width += it->current_x; | |
4386 | break; | |
4387 | ||
4388 | default: | |
4389 | abort (); | |
4390 | } | |
4391 | ||
4392 | /* Reset/increment for the next run. */ | |
4393 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
4394 | it->current_x = it->hpos = 0; | |
4395 | it->current_y += it->max_ascent + it->max_descent; | |
4396 | ++it->vpos; | |
4397 | last_height = it->max_ascent + it->max_descent; | |
4398 | last_max_ascent = it->max_ascent; | |
4399 | it->max_ascent = it->max_descent = 0; | |
4400 | } | |
4401 | out:; | |
4402 | } | |
4403 | ||
4404 | ||
4405 | /* Move iterator IT backward by a specified y-distance DY, DY >= 0. | |
4406 | ||
4407 | If DY > 0, move IT backward at least that many pixels. DY = 0 | |
4408 | means move IT backward to the preceding line start or BEGV. This | |
4409 | function may move over more than DY pixels if IT->current_y - DY | |
4410 | ends up in the middle of a line; in this case IT->current_y will be | |
4411 | set to the top of the line moved to. */ | |
4412 | ||
4413 | void | |
4414 | move_it_vertically_backward (it, dy) | |
4415 | struct it *it; | |
4416 | int dy; | |
4417 | { | |
4418 | int nlines, h, line_height; | |
4419 | struct it it2; | |
4420 | int start_pos = IT_CHARPOS (*it); | |
4421 | ||
4422 | xassert (dy >= 0); | |
4423 | ||
4424 | /* Estimate how many newlines we must move back. */ | |
4425 | nlines = max (1, dy / CANON_Y_UNIT (it->f)); | |
4426 | ||
4427 | /* Set the iterator's position that many lines back. */ | |
4428 | while (nlines-- && IT_CHARPOS (*it) > BEGV) | |
4429 | back_to_previous_visible_line_start (it); | |
4430 | ||
4431 | /* Reseat the iterator here. When moving backward, we don't want | |
4432 | reseat to skip forward over invisible text, set up the iterator | |
4433 | to deliver from overlay strings at the new position etc. So, | |
4434 | use reseat_1 here. */ | |
4435 | reseat_1 (it, it->current.pos, 1); | |
4436 | ||
4437 | /* We are now surely at a line start. */ | |
4438 | it->current_x = it->hpos = 0; | |
4439 | ||
4440 | /* Move forward and see what y-distance we moved. First move to the | |
4441 | start of the next line so that we get its height. We need this | |
4442 | height to be able to tell whether we reached the specified | |
4443 | y-distance. */ | |
4444 | it2 = *it; | |
4445 | it2.max_ascent = it2.max_descent = 0; | |
4446 | move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, | |
4447 | MOVE_TO_POS | MOVE_TO_VPOS); | |
4448 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4449 | line_height = it2.max_ascent + it2.max_descent; | |
4450 | move_it_to (&it2, start_pos, -1, -1, -1, MOVE_TO_POS); | |
4451 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4452 | h = it2.current_y - it->current_y; | |
4453 | nlines = it2.vpos - it->vpos; | |
4454 | ||
4455 | /* Correct IT's y and vpos position. */ | |
4456 | it->vpos -= nlines; | |
4457 | it->current_y -= h; | |
4458 | ||
4459 | if (dy == 0) | |
4460 | { | |
4461 | /* DY == 0 means move to the start of the screen line. The | |
4462 | value of nlines is > 0 if continuation lines were involved. */ | |
4463 | if (nlines > 0) | |
4464 | move_it_by_lines (it, nlines, 1); | |
4465 | xassert (IT_CHARPOS (*it) <= start_pos); | |
4466 | } | |
4467 | else if (nlines) | |
4468 | { | |
4469 | /* The y-position we try to reach. Note that h has been | |
4470 | subtracted in front of the if-statement. */ | |
4471 | int target_y = it->current_y + h - dy; | |
4472 | ||
4473 | /* If we did not reach target_y, try to move further backward if | |
4474 | we can. If we moved too far backward, try to move forward. */ | |
4475 | if (target_y < it->current_y | |
4476 | && IT_CHARPOS (*it) > BEGV) | |
4477 | { | |
4478 | move_it_vertically (it, target_y - it->current_y); | |
4479 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4480 | } | |
4481 | else if (target_y >= it->current_y + line_height | |
4482 | && IT_CHARPOS (*it) < ZV) | |
4483 | { | |
4484 | move_it_vertically (it, target_y - (it->current_y + line_height)); | |
4485 | xassert (IT_CHARPOS (*it) >= BEGV); | |
4486 | } | |
4487 | } | |
4488 | } | |
4489 | ||
4490 | ||
4491 | /* Move IT by a specified amount of pixel lines DY. DY negative means | |
4492 | move backwards. DY = 0 means move to start of screen line. At the | |
4493 | end, IT will be on the start of a screen line. */ | |
4494 | ||
4495 | void | |
4496 | move_it_vertically (it, dy) | |
4497 | struct it *it; | |
4498 | int dy; | |
4499 | { | |
4500 | if (dy <= 0) | |
4501 | move_it_vertically_backward (it, -dy); | |
4502 | else if (dy > 0) | |
4503 | { | |
4504 | move_it_to (it, ZV, -1, it->current_y + dy, -1, | |
4505 | MOVE_TO_POS | MOVE_TO_Y); | |
4506 | ||
4507 | /* If buffer ends in ZV without a newline, move to the start of | |
4508 | the line to satisfy the post-condition. */ | |
4509 | if (IT_CHARPOS (*it) == ZV | |
4510 | && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n') | |
4511 | move_it_by_lines (it, 0, 0); | |
4512 | } | |
4513 | } | |
4514 | ||
4515 | ||
4516 | /* Return non-zero if some text between buffer positions START_CHARPOS | |
4517 | and END_CHARPOS is invisible. IT->window is the window for text | |
4518 | property lookup. */ | |
4519 | ||
4520 | static int | |
4521 | invisible_text_between_p (it, start_charpos, end_charpos) | |
4522 | struct it *it; | |
4523 | int start_charpos, end_charpos; | |
4524 | { | |
5f5c8ee5 GM |
4525 | Lisp_Object prop, limit; |
4526 | int invisible_found_p; | |
4527 | ||
4528 | xassert (it != NULL && start_charpos <= end_charpos); | |
4529 | ||
4530 | /* Is text at START invisible? */ | |
4531 | prop = Fget_char_property (make_number (start_charpos), Qinvisible, | |
4532 | it->window); | |
4533 | if (TEXT_PROP_MEANS_INVISIBLE (prop)) | |
4534 | invisible_found_p = 1; | |
4535 | else | |
4536 | { | |
6c577098 GM |
4537 | limit = next_single_char_property_change (make_number (start_charpos), |
4538 | Qinvisible, Qnil, | |
4539 | make_number (end_charpos)); | |
5f5c8ee5 GM |
4540 | invisible_found_p = XFASTINT (limit) < end_charpos; |
4541 | } | |
4542 | ||
4543 | return invisible_found_p; | |
5f5c8ee5 GM |
4544 | } |
4545 | ||
4546 | ||
4547 | /* Move IT by a specified number DVPOS of screen lines down. DVPOS | |
4548 | negative means move up. DVPOS == 0 means move to the start of the | |
4549 | screen line. NEED_Y_P non-zero means calculate IT->current_y. If | |
4550 | NEED_Y_P is zero, IT->current_y will be left unchanged. | |
4551 | ||
4552 | Further optimization ideas: If we would know that IT->f doesn't use | |
4553 | a face with proportional font, we could be faster for | |
4554 | truncate-lines nil. */ | |
4555 | ||
4556 | void | |
4557 | move_it_by_lines (it, dvpos, need_y_p) | |
4558 | struct it *it; | |
4559 | int dvpos, need_y_p; | |
4560 | { | |
4561 | struct position pos; | |
4562 | ||
4563 | if (!FRAME_WINDOW_P (it->f)) | |
4564 | { | |
4565 | struct text_pos textpos; | |
4566 | ||
4567 | /* We can use vmotion on frames without proportional fonts. */ | |
4568 | pos = *vmotion (IT_CHARPOS (*it), dvpos, it->w); | |
4569 | SET_TEXT_POS (textpos, pos.bufpos, pos.bytepos); | |
4570 | reseat (it, textpos, 1); | |
4571 | it->vpos += pos.vpos; | |
4572 | it->current_y += pos.vpos; | |
4573 | } | |
4574 | else if (dvpos == 0) | |
4575 | { | |
4576 | /* DVPOS == 0 means move to the start of the screen line. */ | |
4577 | move_it_vertically_backward (it, 0); | |
4578 | xassert (it->current_x == 0 && it->hpos == 0); | |
4579 | } | |
4580 | else if (dvpos > 0) | |
4581 | { | |
4582 | /* If there are no continuation lines, and if there is no | |
4583 | selective display, try the simple method of moving forward | |
4584 | DVPOS newlines, then see where we are. */ | |
4585 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4586 | { | |
4587 | int shortage = 0, charpos; | |
4588 | ||
4589 | if (FETCH_BYTE (IT_BYTEPOS (*it) == '\n')) | |
4590 | charpos = IT_CHARPOS (*it) + 1; | |
4591 | else | |
4592 | charpos = scan_buffer ('\n', IT_CHARPOS (*it), 0, dvpos, | |
4593 | &shortage, 0); | |
4594 | ||
4595 | if (!invisible_text_between_p (it, IT_CHARPOS (*it), charpos)) | |
4596 | { | |
4597 | struct text_pos pos; | |
4598 | CHARPOS (pos) = charpos; | |
4599 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4600 | reseat (it, pos, 1); | |
4601 | it->vpos += dvpos - shortage; | |
4602 | it->hpos = it->current_x = 0; | |
4603 | return; | |
4604 | } | |
4605 | } | |
4606 | ||
4607 | move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); | |
4608 | } | |
4609 | else | |
4610 | { | |
4611 | struct it it2; | |
4612 | int start_charpos, i; | |
4613 | ||
4614 | /* If there are no continuation lines, and if there is no | |
4615 | selective display, try the simple method of moving backward | |
4616 | -DVPOS newlines. */ | |
4617 | if (!need_y_p && it->truncate_lines_p && it->selective == 0) | |
4618 | { | |
4619 | int shortage; | |
4620 | int charpos = IT_CHARPOS (*it); | |
4621 | int bytepos = IT_BYTEPOS (*it); | |
4622 | ||
4623 | /* If in the middle of a line, go to its start. */ | |
4624 | if (charpos > BEGV && FETCH_BYTE (bytepos - 1) != '\n') | |
4625 | { | |
4626 | charpos = find_next_newline_no_quit (charpos, -1); | |
4627 | bytepos = CHAR_TO_BYTE (charpos); | |
4628 | } | |
4629 | ||
4630 | if (charpos == BEGV) | |
4631 | { | |
4632 | struct text_pos pos; | |
4633 | CHARPOS (pos) = charpos; | |
4634 | BYTEPOS (pos) = bytepos; | |
4635 | reseat (it, pos, 1); | |
4636 | it->hpos = it->current_x = 0; | |
4637 | return; | |
4638 | } | |
4639 | else | |
4640 | { | |
4641 | charpos = scan_buffer ('\n', charpos - 1, 0, dvpos, &shortage, 0); | |
4642 | if (!invisible_text_between_p (it, charpos, IT_CHARPOS (*it))) | |
4643 | { | |
4644 | struct text_pos pos; | |
4645 | CHARPOS (pos) = charpos; | |
4646 | BYTEPOS (pos) = CHAR_TO_BYTE (charpos); | |
4647 | reseat (it, pos, 1); | |
4648 | it->vpos += dvpos + (shortage ? shortage - 1 : 0); | |
4649 | it->hpos = it->current_x = 0; | |
4650 | return; | |
4651 | } | |
4652 | } | |
4653 | } | |
4654 | ||
4655 | /* Go back -DVPOS visible lines and reseat the iterator there. */ | |
4656 | start_charpos = IT_CHARPOS (*it); | |
4657 | for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) | |
4658 | back_to_previous_visible_line_start (it); | |
4659 | reseat (it, it->current.pos, 1); | |
4660 | it->current_x = it->hpos = 0; | |
4661 | ||
4662 | /* Above call may have moved too far if continuation lines | |
4663 | are involved. Scan forward and see if it did. */ | |
4664 | it2 = *it; | |
4665 | it2.vpos = it2.current_y = 0; | |
4666 | move_it_to (&it2, start_charpos, -1, -1, -1, MOVE_TO_POS); | |
4667 | it->vpos -= it2.vpos; | |
4668 | it->current_y -= it2.current_y; | |
4669 | it->current_x = it->hpos = 0; | |
4670 | ||
4671 | /* If we moved too far, move IT some lines forward. */ | |
4672 | if (it2.vpos > -dvpos) | |
4673 | { | |
4674 | int delta = it2.vpos + dvpos; | |
4675 | move_it_to (it, -1, -1, -1, it->vpos + delta, MOVE_TO_VPOS); | |
4676 | } | |
4677 | } | |
4678 | } | |
4679 | ||
4680 | ||
4681 | \f | |
4682 | /*********************************************************************** | |
4683 | Messages | |
4684 | ***********************************************************************/ | |
4685 | ||
4686 | ||
937248bc GM |
4687 | /* Add a message with format string FORMAT and arguments ARG1 and ARG2 |
4688 | to *Messages*. */ | |
4689 | ||
4690 | void | |
4691 | add_to_log (format, arg1, arg2) | |
4692 | char *format; | |
4693 | Lisp_Object arg1, arg2; | |
4694 | { | |
4695 | Lisp_Object args[3]; | |
4696 | Lisp_Object msg, fmt; | |
4697 | char *buffer; | |
4698 | int len; | |
4699 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4700 | ||
4701 | fmt = msg = Qnil; | |
4702 | GCPRO4 (fmt, msg, arg1, arg2); | |
4703 | ||
4704 | args[0] = fmt = build_string (format); | |
4705 | args[1] = arg1; | |
4706 | args[2] = arg2; | |
4707 | msg = Fformat (make_number (3), args); | |
4708 | ||
4709 | len = STRING_BYTES (XSTRING (msg)) + 1; | |
4710 | buffer = (char *) alloca (len); | |
4711 | strcpy (buffer, XSTRING (msg)->data); | |
4712 | ||
4713 | message_dolog (buffer, len, 1, 0); | |
4714 | UNGCPRO; | |
4715 | } | |
4716 | ||
4717 | ||
5f5c8ee5 GM |
4718 | /* Output a newline in the *Messages* buffer if "needs" one. */ |
4719 | ||
4720 | void | |
4721 | message_log_maybe_newline () | |
4722 | { | |
4723 | if (message_log_need_newline) | |
4724 | message_dolog ("", 0, 1, 0); | |
4725 | } | |
4726 | ||
4727 | ||
4728 | /* Add a string M of length LEN to the message log, optionally | |
4729 | terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if | |
4730 | nonzero, means interpret the contents of M as multibyte. This | |
4731 | function calls low-level routines in order to bypass text property | |
4732 | hooks, etc. which might not be safe to run. */ | |
4733 | ||
4734 | void | |
4735 | message_dolog (m, len, nlflag, multibyte) | |
4736 | char *m; | |
4737 | int len, nlflag, multibyte; | |
4738 | { | |
4739 | if (!NILP (Vmessage_log_max)) | |
4740 | { | |
4741 | struct buffer *oldbuf; | |
4742 | Lisp_Object oldpoint, oldbegv, oldzv; | |
4743 | int old_windows_or_buffers_changed = windows_or_buffers_changed; | |
4744 | int point_at_end = 0; | |
4745 | int zv_at_end = 0; | |
4746 | Lisp_Object old_deactivate_mark, tem; | |
4747 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
4748 | ||
4749 | old_deactivate_mark = Vdeactivate_mark; | |
4750 | oldbuf = current_buffer; | |
4751 | Fset_buffer (Fget_buffer_create (build_string ("*Messages*"))); | |
4752 | current_buffer->undo_list = Qt; | |
4753 | ||
4754 | oldpoint = Fpoint_marker (); | |
4755 | oldbegv = Fpoint_min_marker (); | |
4756 | oldzv = Fpoint_max_marker (); | |
4757 | GCPRO4 (oldpoint, oldbegv, oldzv, old_deactivate_mark); | |
4758 | ||
4759 | if (PT == Z) | |
4760 | point_at_end = 1; | |
4761 | if (ZV == Z) | |
4762 | zv_at_end = 1; | |
4763 | ||
4764 | BEGV = BEG; | |
4765 | BEGV_BYTE = BEG_BYTE; | |
4766 | ZV = Z; | |
4767 | ZV_BYTE = Z_BYTE; | |
4768 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4769 | ||
4770 | /* Insert the string--maybe converting multibyte to single byte | |
4771 | or vice versa, so that all the text fits the buffer. */ | |
4772 | if (multibyte | |
4773 | && NILP (current_buffer->enable_multibyte_characters)) | |
4774 | { | |
4775 | int i, c, nbytes; | |
4776 | unsigned char work[1]; | |
4777 | ||
4778 | /* Convert a multibyte string to single-byte | |
4779 | for the *Message* buffer. */ | |
4780 | for (i = 0; i < len; i += nbytes) | |
4781 | { | |
4fdb80f2 | 4782 | c = string_char_and_length (m + i, len - i, &nbytes); |
5f5c8ee5 GM |
4783 | work[0] = (SINGLE_BYTE_CHAR_P (c) |
4784 | ? c | |
4785 | : multibyte_char_to_unibyte (c, Qnil)); | |
4786 | insert_1_both (work, 1, 1, 1, 0, 0); | |
4787 | } | |
4788 | } | |
4789 | else if (! multibyte | |
4790 | && ! NILP (current_buffer->enable_multibyte_characters)) | |
4791 | { | |
4792 | int i, c, nbytes; | |
4793 | unsigned char *msg = (unsigned char *) m; | |
260a86a0 | 4794 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
5f5c8ee5 GM |
4795 | /* Convert a single-byte string to multibyte |
4796 | for the *Message* buffer. */ | |
4797 | for (i = 0; i < len; i++) | |
4798 | { | |
4799 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
4800 | nbytes = CHAR_STRING (c, str); |
4801 | insert_1_both (str, 1, nbytes, 1, 0, 0); | |
5f5c8ee5 GM |
4802 | } |
4803 | } | |
4804 | else if (len) | |
4805 | insert_1 (m, len, 1, 0, 0); | |
4806 | ||
4807 | if (nlflag) | |
4808 | { | |
4809 | int this_bol, this_bol_byte, prev_bol, prev_bol_byte, dup; | |
4810 | insert_1 ("\n", 1, 1, 0, 0); | |
4811 | ||
4812 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, -2, 0); | |
4813 | this_bol = PT; | |
4814 | this_bol_byte = PT_BYTE; | |
4815 | ||
4816 | if (this_bol > BEG) | |
4817 | { | |
4818 | scan_newline (PT, PT_BYTE, BEG, BEG_BYTE, -2, 0); | |
4819 | prev_bol = PT; | |
4820 | prev_bol_byte = PT_BYTE; | |
4821 | ||
4822 | dup = message_log_check_duplicate (prev_bol, prev_bol_byte, | |
4823 | this_bol, this_bol_byte); | |
4824 | if (dup) | |
4825 | { | |
4826 | del_range_both (prev_bol, prev_bol_byte, | |
4827 | this_bol, this_bol_byte, 0); | |
4828 | if (dup > 1) | |
4829 | { | |
4830 | char dupstr[40]; | |
4831 | int duplen; | |
4832 | ||
4833 | /* If you change this format, don't forget to also | |
4834 | change message_log_check_duplicate. */ | |
4835 | sprintf (dupstr, " [%d times]", dup); | |
4836 | duplen = strlen (dupstr); | |
4837 | TEMP_SET_PT_BOTH (Z - 1, Z_BYTE - 1); | |
4838 | insert_1 (dupstr, duplen, 1, 0, 1); | |
4839 | } | |
4840 | } | |
4841 | } | |
4842 | ||
4843 | if (NATNUMP (Vmessage_log_max)) | |
4844 | { | |
4845 | scan_newline (Z, Z_BYTE, BEG, BEG_BYTE, | |
4846 | -XFASTINT (Vmessage_log_max) - 1, 0); | |
4847 | del_range_both (BEG, BEG_BYTE, PT, PT_BYTE, 0); | |
4848 | } | |
4849 | } | |
4850 | BEGV = XMARKER (oldbegv)->charpos; | |
4851 | BEGV_BYTE = marker_byte_position (oldbegv); | |
4852 | ||
4853 | if (zv_at_end) | |
4854 | { | |
4855 | ZV = Z; | |
4856 | ZV_BYTE = Z_BYTE; | |
4857 | } | |
4858 | else | |
4859 | { | |
4860 | ZV = XMARKER (oldzv)->charpos; | |
4861 | ZV_BYTE = marker_byte_position (oldzv); | |
4862 | } | |
4863 | ||
4864 | if (point_at_end) | |
4865 | TEMP_SET_PT_BOTH (Z, Z_BYTE); | |
4866 | else | |
4867 | /* We can't do Fgoto_char (oldpoint) because it will run some | |
4868 | Lisp code. */ | |
4869 | TEMP_SET_PT_BOTH (XMARKER (oldpoint)->charpos, | |
4870 | XMARKER (oldpoint)->bytepos); | |
4871 | ||
4872 | UNGCPRO; | |
4873 | free_marker (oldpoint); | |
4874 | free_marker (oldbegv); | |
4875 | free_marker (oldzv); | |
4876 | ||
4877 | tem = Fget_buffer_window (Fcurrent_buffer (), Qt); | |
4878 | set_buffer_internal (oldbuf); | |
4879 | if (NILP (tem)) | |
4880 | windows_or_buffers_changed = old_windows_or_buffers_changed; | |
4881 | message_log_need_newline = !nlflag; | |
4882 | Vdeactivate_mark = old_deactivate_mark; | |
4883 | } | |
4884 | } | |
4885 | ||
4886 | ||
4887 | /* We are at the end of the buffer after just having inserted a newline. | |
4888 | (Note: We depend on the fact we won't be crossing the gap.) | |
4889 | Check to see if the most recent message looks a lot like the previous one. | |
4890 | Return 0 if different, 1 if the new one should just replace it, or a | |
4891 | value N > 1 if we should also append " [N times]". */ | |
4892 | ||
4893 | static int | |
4894 | message_log_check_duplicate (prev_bol, prev_bol_byte, this_bol, this_bol_byte) | |
4895 | int prev_bol, this_bol; | |
4896 | int prev_bol_byte, this_bol_byte; | |
4897 | { | |
4898 | int i; | |
4899 | int len = Z_BYTE - 1 - this_bol_byte; | |
4900 | int seen_dots = 0; | |
4901 | unsigned char *p1 = BUF_BYTE_ADDRESS (current_buffer, prev_bol_byte); | |
4902 | unsigned char *p2 = BUF_BYTE_ADDRESS (current_buffer, this_bol_byte); | |
4903 | ||
4904 | for (i = 0; i < len; i++) | |
4905 | { | |
4906 | if (i >= 3 && p1[i-3] == '.' && p1[i-2] == '.' && p1[i-1] == '.' | |
4907 | && p1[i] != '\n') | |
4908 | seen_dots = 1; | |
4909 | if (p1[i] != p2[i]) | |
4910 | return seen_dots; | |
4911 | } | |
4912 | p1 += len; | |
4913 | if (*p1 == '\n') | |
4914 | return 2; | |
4915 | if (*p1++ == ' ' && *p1++ == '[') | |
4916 | { | |
4917 | int n = 0; | |
4918 | while (*p1 >= '0' && *p1 <= '9') | |
4919 | n = n * 10 + *p1++ - '0'; | |
4920 | if (strncmp (p1, " times]\n", 8) == 0) | |
4921 | return n+1; | |
4922 | } | |
4923 | return 0; | |
4924 | } | |
4925 | ||
4926 | ||
4927 | /* Display an echo area message M with a specified length of LEN | |
4928 | chars. The string may include null characters. If M is 0, clear | |
4929 | out any existing message, and let the mini-buffer text show through. | |
4930 | ||
4931 | The buffer M must continue to exist until after the echo area gets | |
4932 | cleared or some other message gets displayed there. This means do | |
4933 | not pass text that is stored in a Lisp string; do not pass text in | |
4934 | a buffer that was alloca'd. */ | |
4935 | ||
4936 | void | |
4937 | message2 (m, len, multibyte) | |
4938 | char *m; | |
4939 | int len; | |
4940 | int multibyte; | |
4941 | { | |
4942 | /* First flush out any partial line written with print. */ | |
4943 | message_log_maybe_newline (); | |
4944 | if (m) | |
4945 | message_dolog (m, len, 1, multibyte); | |
4946 | message2_nolog (m, len, multibyte); | |
4947 | } | |
4948 | ||
4949 | ||
4950 | /* The non-logging counterpart of message2. */ | |
4951 | ||
4952 | void | |
4953 | message2_nolog (m, len, multibyte) | |
4954 | char *m; | |
4955 | int len; | |
4956 | { | |
886bd6f2 | 4957 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
4958 | message_enable_multibyte = multibyte; |
4959 | ||
4960 | if (noninteractive) | |
4961 | { | |
4962 | if (noninteractive_need_newline) | |
4963 | putc ('\n', stderr); | |
4964 | noninteractive_need_newline = 0; | |
4965 | if (m) | |
4966 | fwrite (m, len, 1, stderr); | |
4967 | if (cursor_in_echo_area == 0) | |
4968 | fprintf (stderr, "\n"); | |
4969 | fflush (stderr); | |
4970 | } | |
4971 | /* A null message buffer means that the frame hasn't really been | |
4972 | initialized yet. Error messages get reported properly by | |
4973 | cmd_error, so this must be just an informative message; toss it. */ | |
4974 | else if (INTERACTIVE | |
886bd6f2 GM |
4975 | && sf->glyphs_initialized_p |
4976 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
4977 | { |
4978 | Lisp_Object mini_window; | |
4979 | struct frame *f; | |
4980 | ||
4981 | /* Get the frame containing the mini-buffer | |
4982 | that the selected frame is using. */ | |
886bd6f2 | 4983 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
4984 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
4985 | ||
4986 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 4987 | if (FRAME_VISIBLE_P (sf) |
5f5c8ee5 GM |
4988 | && ! FRAME_VISIBLE_P (f)) |
4989 | Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window))); | |
4990 | ||
4991 | if (m) | |
4992 | { | |
c6e89d6c | 4993 | set_message (m, Qnil, len, multibyte); |
5f5c8ee5 GM |
4994 | if (minibuffer_auto_raise) |
4995 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); | |
4996 | } | |
4997 | else | |
c6e89d6c | 4998 | clear_message (1, 1); |
5f5c8ee5 | 4999 | |
c6e89d6c | 5000 | do_pending_window_change (0); |
5f5c8ee5 | 5001 | echo_area_display (1); |
c6e89d6c | 5002 | do_pending_window_change (0); |
5f5c8ee5 GM |
5003 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5004 | (*frame_up_to_date_hook) (f); | |
5005 | } | |
5006 | } | |
5007 | ||
5008 | ||
c6e89d6c GM |
5009 | /* Display an echo area message M with a specified length of NBYTES |
5010 | bytes. The string may include null characters. If M is not a | |
5f5c8ee5 GM |
5011 | string, clear out any existing message, and let the mini-buffer |
5012 | text show through. */ | |
5013 | ||
5014 | void | |
c6e89d6c | 5015 | message3 (m, nbytes, multibyte) |
5f5c8ee5 | 5016 | Lisp_Object m; |
c6e89d6c | 5017 | int nbytes; |
5f5c8ee5 GM |
5018 | int multibyte; |
5019 | { | |
5020 | struct gcpro gcpro1; | |
5021 | ||
5022 | GCPRO1 (m); | |
5023 | ||
5024 | /* First flush out any partial line written with print. */ | |
5025 | message_log_maybe_newline (); | |
5026 | if (STRINGP (m)) | |
c6e89d6c GM |
5027 | message_dolog (XSTRING (m)->data, nbytes, 1, multibyte); |
5028 | message3_nolog (m, nbytes, multibyte); | |
5f5c8ee5 GM |
5029 | |
5030 | UNGCPRO; | |
5031 | } | |
5032 | ||
5033 | ||
5034 | /* The non-logging version of message3. */ | |
5035 | ||
5036 | void | |
c6e89d6c | 5037 | message3_nolog (m, nbytes, multibyte) |
5f5c8ee5 | 5038 | Lisp_Object m; |
c6e89d6c | 5039 | int nbytes, multibyte; |
5f5c8ee5 | 5040 | { |
886bd6f2 | 5041 | struct frame *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5042 | message_enable_multibyte = multibyte; |
5043 | ||
5044 | if (noninteractive) | |
5045 | { | |
5046 | if (noninteractive_need_newline) | |
5047 | putc ('\n', stderr); | |
5048 | noninteractive_need_newline = 0; | |
5049 | if (STRINGP (m)) | |
c6e89d6c | 5050 | fwrite (XSTRING (m)->data, nbytes, 1, stderr); |
5f5c8ee5 GM |
5051 | if (cursor_in_echo_area == 0) |
5052 | fprintf (stderr, "\n"); | |
5053 | fflush (stderr); | |
5054 | } | |
5055 | /* A null message buffer means that the frame hasn't really been | |
5056 | initialized yet. Error messages get reported properly by | |
5057 | cmd_error, so this must be just an informative message; toss it. */ | |
5058 | else if (INTERACTIVE | |
886bd6f2 GM |
5059 | && sf->glyphs_initialized_p |
5060 | && FRAME_MESSAGE_BUF (sf)) | |
5f5c8ee5 GM |
5061 | { |
5062 | Lisp_Object mini_window; | |
c6e89d6c | 5063 | Lisp_Object frame; |
5f5c8ee5 GM |
5064 | struct frame *f; |
5065 | ||
5066 | /* Get the frame containing the mini-buffer | |
5067 | that the selected frame is using. */ | |
886bd6f2 | 5068 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5069 | frame = XWINDOW (mini_window)->frame; |
5070 | f = XFRAME (frame); | |
5f5c8ee5 GM |
5071 | |
5072 | FRAME_SAMPLE_VISIBILITY (f); | |
886bd6f2 | 5073 | if (FRAME_VISIBLE_P (sf) |
c6e89d6c GM |
5074 | && !FRAME_VISIBLE_P (f)) |
5075 | Fmake_frame_visible (frame); | |
5f5c8ee5 | 5076 | |
c6e89d6c | 5077 | if (STRINGP (m) && XSTRING (m)->size) |
5f5c8ee5 | 5078 | { |
c6e89d6c | 5079 | set_message (NULL, m, nbytes, multibyte); |
468155d7 GM |
5080 | if (minibuffer_auto_raise) |
5081 | Fraise_frame (frame); | |
5f5c8ee5 GM |
5082 | } |
5083 | else | |
c6e89d6c | 5084 | clear_message (1, 1); |
5f5c8ee5 | 5085 | |
c6e89d6c | 5086 | do_pending_window_change (0); |
5f5c8ee5 | 5087 | echo_area_display (1); |
c6e89d6c | 5088 | do_pending_window_change (0); |
5f5c8ee5 GM |
5089 | if (frame_up_to_date_hook != 0 && ! gc_in_progress) |
5090 | (*frame_up_to_date_hook) (f); | |
5091 | } | |
5092 | } | |
5093 | ||
5094 | ||
5095 | /* Display a null-terminated echo area message M. If M is 0, clear | |
5096 | out any existing message, and let the mini-buffer text show through. | |
5097 | ||
5098 | The buffer M must continue to exist until after the echo area gets | |
5099 | cleared or some other message gets displayed there. Do not pass | |
5100 | text that is stored in a Lisp string. Do not pass text in a buffer | |
5101 | that was alloca'd. */ | |
5102 | ||
5103 | void | |
5104 | message1 (m) | |
5105 | char *m; | |
5106 | { | |
5107 | message2 (m, (m ? strlen (m) : 0), 0); | |
5108 | } | |
5109 | ||
5110 | ||
5111 | /* The non-logging counterpart of message1. */ | |
5112 | ||
5113 | void | |
5114 | message1_nolog (m) | |
5115 | char *m; | |
5116 | { | |
5117 | message2_nolog (m, (m ? strlen (m) : 0), 0); | |
5118 | } | |
5119 | ||
5120 | /* Display a message M which contains a single %s | |
5121 | which gets replaced with STRING. */ | |
5122 | ||
5123 | void | |
5124 | message_with_string (m, string, log) | |
5125 | char *m; | |
5126 | Lisp_Object string; | |
5127 | int log; | |
5128 | { | |
5129 | if (noninteractive) | |
5130 | { | |
5131 | if (m) | |
5132 | { | |
5133 | if (noninteractive_need_newline) | |
5134 | putc ('\n', stderr); | |
5135 | noninteractive_need_newline = 0; | |
5136 | fprintf (stderr, m, XSTRING (string)->data); | |
5137 | if (cursor_in_echo_area == 0) | |
5138 | fprintf (stderr, "\n"); | |
5139 | fflush (stderr); | |
5140 | } | |
5141 | } | |
5142 | else if (INTERACTIVE) | |
5143 | { | |
5144 | /* The frame whose minibuffer we're going to display the message on. | |
5145 | It may be larger than the selected frame, so we need | |
5146 | to use its buffer, not the selected frame's buffer. */ | |
5147 | Lisp_Object mini_window; | |
886bd6f2 | 5148 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5149 | |
5150 | /* Get the frame containing the minibuffer | |
5151 | that the selected frame is using. */ | |
886bd6f2 | 5152 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5153 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5154 | ||
5155 | /* A null message buffer means that the frame hasn't really been | |
5156 | initialized yet. Error messages get reported properly by | |
5157 | cmd_error, so this must be just an informative message; toss it. */ | |
5158 | if (FRAME_MESSAGE_BUF (f)) | |
5159 | { | |
5160 | int len; | |
5161 | char *a[1]; | |
5162 | a[0] = (char *) XSTRING (string)->data; | |
5163 | ||
5164 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5165 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5166 | ||
5167 | if (log) | |
5168 | message2 (FRAME_MESSAGE_BUF (f), len, | |
5169 | STRING_MULTIBYTE (string)); | |
5170 | else | |
5171 | message2_nolog (FRAME_MESSAGE_BUF (f), len, | |
5172 | STRING_MULTIBYTE (string)); | |
5173 | ||
5174 | /* Print should start at the beginning of the message | |
5175 | buffer next time. */ | |
5176 | message_buf_print = 0; | |
5177 | } | |
5178 | } | |
5179 | } | |
5180 | ||
5181 | ||
5f5c8ee5 GM |
5182 | /* Dump an informative message to the minibuf. If M is 0, clear out |
5183 | any existing message, and let the mini-buffer text show through. */ | |
5184 | ||
5185 | /* VARARGS 1 */ | |
5186 | void | |
5187 | message (m, a1, a2, a3) | |
5188 | char *m; | |
5189 | EMACS_INT a1, a2, a3; | |
5190 | { | |
5191 | if (noninteractive) | |
5192 | { | |
5193 | if (m) | |
5194 | { | |
5195 | if (noninteractive_need_newline) | |
5196 | putc ('\n', stderr); | |
5197 | noninteractive_need_newline = 0; | |
5198 | fprintf (stderr, m, a1, a2, a3); | |
5199 | if (cursor_in_echo_area == 0) | |
5200 | fprintf (stderr, "\n"); | |
5201 | fflush (stderr); | |
5202 | } | |
5203 | } | |
5204 | else if (INTERACTIVE) | |
5205 | { | |
5206 | /* The frame whose mini-buffer we're going to display the message | |
5207 | on. It may be larger than the selected frame, so we need to | |
5208 | use its buffer, not the selected frame's buffer. */ | |
5209 | Lisp_Object mini_window; | |
886bd6f2 | 5210 | struct frame *f, *sf = SELECTED_FRAME (); |
5f5c8ee5 GM |
5211 | |
5212 | /* Get the frame containing the mini-buffer | |
5213 | that the selected frame is using. */ | |
886bd6f2 | 5214 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
5f5c8ee5 GM |
5215 | f = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
5216 | ||
5217 | /* A null message buffer means that the frame hasn't really been | |
5218 | initialized yet. Error messages get reported properly by | |
5219 | cmd_error, so this must be just an informative message; toss | |
5220 | it. */ | |
5221 | if (FRAME_MESSAGE_BUF (f)) | |
5222 | { | |
5223 | if (m) | |
5224 | { | |
5225 | int len; | |
5226 | #ifdef NO_ARG_ARRAY | |
5227 | char *a[3]; | |
5228 | a[0] = (char *) a1; | |
5229 | a[1] = (char *) a2; | |
5230 | a[2] = (char *) a3; | |
5231 | ||
5232 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5233 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, a); | |
5234 | #else | |
5235 | len = doprnt (FRAME_MESSAGE_BUF (f), | |
5236 | FRAME_MESSAGE_BUF_SIZE (f), m, (char *)0, 3, | |
5237 | (char **) &a1); | |
5238 | #endif /* NO_ARG_ARRAY */ | |
5239 | ||
5240 | message2 (FRAME_MESSAGE_BUF (f), len, 0); | |
5241 | } | |
5242 | else | |
5243 | message1 (0); | |
5244 | ||
5245 | /* Print should start at the beginning of the message | |
5246 | buffer next time. */ | |
5247 | message_buf_print = 0; | |
5248 | } | |
5249 | } | |
5250 | } | |
5251 | ||
5252 | ||
5253 | /* The non-logging version of message. */ | |
5254 | ||
5255 | void | |
5256 | message_nolog (m, a1, a2, a3) | |
5257 | char *m; | |
5258 | EMACS_INT a1, a2, a3; | |
5259 | { | |
5260 | Lisp_Object old_log_max; | |
5261 | old_log_max = Vmessage_log_max; | |
5262 | Vmessage_log_max = Qnil; | |
5263 | message (m, a1, a2, a3); | |
5264 | Vmessage_log_max = old_log_max; | |
5265 | } | |
5266 | ||
5267 | ||
c6e89d6c GM |
5268 | /* Display the current message in the current mini-buffer. This is |
5269 | only called from error handlers in process.c, and is not time | |
5270 | critical. */ | |
5f5c8ee5 GM |
5271 | |
5272 | void | |
5273 | update_echo_area () | |
5274 | { | |
c6e89d6c GM |
5275 | if (!NILP (echo_area_buffer[0])) |
5276 | { | |
5277 | Lisp_Object string; | |
5278 | string = Fcurrent_message (); | |
5279 | message3 (string, XSTRING (string)->size, | |
5280 | !NILP (current_buffer->enable_multibyte_characters)); | |
5281 | } | |
5282 | } | |
5283 | ||
5284 | ||
5bcfeb49 GM |
5285 | /* Make sure echo area buffers in echo_buffers[] are life. If they |
5286 | aren't, make new ones. */ | |
5287 | ||
5288 | static void | |
5289 | ensure_echo_area_buffers () | |
5290 | { | |
5291 | int i; | |
5292 | ||
5293 | for (i = 0; i < 2; ++i) | |
5294 | if (!BUFFERP (echo_buffer[i]) | |
5295 | || NILP (XBUFFER (echo_buffer[i])->name)) | |
5296 | { | |
5297 | char name[30]; | |
5298 | sprintf (name, " *Echo Area %d*", i); | |
5299 | echo_buffer[i] = Fget_buffer_create (build_string (name)); | |
5300 | } | |
5301 | } | |
5302 | ||
5303 | ||
c6e89d6c GM |
5304 | /* Call FN with args A1..A5 with either the current or last displayed |
5305 | echo_area_buffer as current buffer. | |
5306 | ||
5307 | WHICH zero means use the current message buffer | |
5308 | echo_area_buffer[0]. If that is nil, choose a suitable buffer | |
5309 | from echo_buffer[] and clear it. | |
5310 | ||
5311 | WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a | |
5312 | suitable buffer from echo_buffer[] and clear it. | |
5313 | ||
5314 | If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so | |
5315 | that the current message becomes the last displayed one, make | |
5316 | choose a suitable buffer for echo_area_buffer[0], and clear it. | |
5317 | ||
5318 | Value is what FN returns. */ | |
5319 | ||
5320 | static int | |
5321 | with_echo_area_buffer (w, which, fn, a1, a2, a3, a4, a5) | |
5322 | struct window *w; | |
5323 | int which; | |
5324 | int (*fn) (); | |
5325 | int a1, a2, a3, a4, a5; | |
5326 | { | |
5327 | Lisp_Object buffer; | |
5328 | int i, this_one, the_other, clear_buffer_p, rc; | |
5329 | int count = specpdl_ptr - specpdl; | |
5330 | ||
5331 | /* If buffers aren't life, make new ones. */ | |
5bcfeb49 | 5332 | ensure_echo_area_buffers (); |
c6e89d6c GM |
5333 | |
5334 | clear_buffer_p = 0; | |
5335 | ||
5336 | if (which == 0) | |
5337 | this_one = 0, the_other = 1; | |
5338 | else if (which > 0) | |
5339 | this_one = 1, the_other = 0; | |
5f5c8ee5 | 5340 | else |
c6e89d6c GM |
5341 | { |
5342 | this_one = 0, the_other = 1; | |
5343 | clear_buffer_p = 1; | |
5344 | ||
5345 | /* We need a fresh one in case the current echo buffer equals | |
5346 | the one containing the last displayed echo area message. */ | |
5347 | if (!NILP (echo_area_buffer[this_one]) | |
5348 | && EQ (echo_area_buffer[this_one], echo_area_buffer[the_other])) | |
5349 | echo_area_buffer[this_one] = Qnil; | |
c6e89d6c GM |
5350 | } |
5351 | ||
5352 | /* Choose a suitable buffer from echo_buffer[] is we don't | |
5353 | have one. */ | |
5354 | if (NILP (echo_area_buffer[this_one])) | |
5355 | { | |
5356 | echo_area_buffer[this_one] | |
5357 | = (EQ (echo_area_buffer[the_other], echo_buffer[this_one]) | |
5358 | ? echo_buffer[the_other] | |
5359 | : echo_buffer[this_one]); | |
5360 | clear_buffer_p = 1; | |
5361 | } | |
5362 | ||
5363 | buffer = echo_area_buffer[this_one]; | |
5364 | ||
5365 | record_unwind_protect (unwind_with_echo_area_buffer, | |
5366 | with_echo_area_buffer_unwind_data (w)); | |
5367 | ||
5368 | /* Make the echo area buffer current. Note that for display | |
5369 | purposes, it is not necessary that the displayed window's buffer | |
5370 | == current_buffer, except for text property lookup. So, let's | |
5371 | only set that buffer temporarily here without doing a full | |
5372 | Fset_window_buffer. We must also change w->pointm, though, | |
5373 | because otherwise an assertions in unshow_buffer fails, and Emacs | |
5374 | aborts. */ | |
9142dd5b | 5375 | set_buffer_internal_1 (XBUFFER (buffer)); |
c6e89d6c GM |
5376 | if (w) |
5377 | { | |
5378 | w->buffer = buffer; | |
5379 | set_marker_both (w->pointm, buffer, BEG, BEG_BYTE); | |
5380 | } | |
5381 | current_buffer->truncate_lines = Qnil; | |
5382 | current_buffer->undo_list = Qt; | |
5383 | current_buffer->read_only = Qnil; | |
5384 | ||
5385 | if (clear_buffer_p && Z > BEG) | |
5386 | del_range (BEG, Z); | |
5387 | ||
5388 | xassert (BEGV >= BEG); | |
5389 | xassert (ZV <= Z && ZV >= BEGV); | |
5390 | ||
5391 | rc = fn (a1, a2, a3, a4, a5); | |
5392 | ||
5393 | xassert (BEGV >= BEG); | |
5394 | xassert (ZV <= Z && ZV >= BEGV); | |
5395 | ||
5396 | unbind_to (count, Qnil); | |
5397 | return rc; | |
5f5c8ee5 GM |
5398 | } |
5399 | ||
5400 | ||
c6e89d6c GM |
5401 | /* Save state that should be preserved around the call to the function |
5402 | FN called in with_echo_area_buffer. */ | |
5f5c8ee5 | 5403 | |
c6e89d6c GM |
5404 | static Lisp_Object |
5405 | with_echo_area_buffer_unwind_data (w) | |
5406 | struct window *w; | |
5f5c8ee5 | 5407 | { |
c6e89d6c GM |
5408 | int i = 0; |
5409 | Lisp_Object vector; | |
5f5c8ee5 | 5410 | |
c6e89d6c GM |
5411 | /* Reduce consing by keeping one vector in |
5412 | Vwith_echo_area_save_vector. */ | |
5413 | vector = Vwith_echo_area_save_vector; | |
5414 | Vwith_echo_area_save_vector = Qnil; | |
5415 | ||
5416 | if (NILP (vector)) | |
9142dd5b | 5417 | vector = Fmake_vector (make_number (7), Qnil); |
c6e89d6c GM |
5418 | |
5419 | XSETBUFFER (XVECTOR (vector)->contents[i], current_buffer); ++i; | |
5420 | XVECTOR (vector)->contents[i++] = Vdeactivate_mark; | |
5421 | XVECTOR (vector)->contents[i++] = make_number (windows_or_buffers_changed); | |
c6e89d6c GM |
5422 | |
5423 | if (w) | |
5424 | { | |
5425 | XSETWINDOW (XVECTOR (vector)->contents[i], w); ++i; | |
5426 | XVECTOR (vector)->contents[i++] = w->buffer; | |
5427 | XVECTOR (vector)->contents[i++] | |
5428 | = make_number (XMARKER (w->pointm)->charpos); | |
5429 | XVECTOR (vector)->contents[i++] | |
5430 | = make_number (XMARKER (w->pointm)->bytepos); | |
5431 | } | |
5432 | else | |
5433 | { | |
5434 | int end = i + 4; | |
5435 | while (i < end) | |
5436 | XVECTOR (vector)->contents[i++] = Qnil; | |
5437 | } | |
5f5c8ee5 | 5438 | |
c6e89d6c GM |
5439 | xassert (i == XVECTOR (vector)->size); |
5440 | return vector; | |
5441 | } | |
5f5c8ee5 | 5442 | |
5f5c8ee5 | 5443 | |
c6e89d6c GM |
5444 | /* Restore global state from VECTOR which was created by |
5445 | with_echo_area_buffer_unwind_data. */ | |
5446 | ||
5447 | static Lisp_Object | |
5448 | unwind_with_echo_area_buffer (vector) | |
5449 | Lisp_Object vector; | |
5450 | { | |
5451 | int i = 0; | |
5452 | ||
9142dd5b | 5453 | set_buffer_internal_1 (XBUFFER (XVECTOR (vector)->contents[i])); ++i; |
c6e89d6c GM |
5454 | Vdeactivate_mark = XVECTOR (vector)->contents[i]; ++i; |
5455 | windows_or_buffers_changed = XFASTINT (XVECTOR (vector)->contents[i]); ++i; | |
c6e89d6c GM |
5456 | |
5457 | if (WINDOWP (XVECTOR (vector)->contents[i])) | |
5458 | { | |
5459 | struct window *w; | |
5460 | Lisp_Object buffer, charpos, bytepos; | |
5461 | ||
5462 | w = XWINDOW (XVECTOR (vector)->contents[i]); ++i; | |
5463 | buffer = XVECTOR (vector)->contents[i]; ++i; | |
5464 | charpos = XVECTOR (vector)->contents[i]; ++i; | |
5465 | bytepos = XVECTOR (vector)->contents[i]; ++i; | |
5466 | ||
5467 | w->buffer = buffer; | |
5468 | set_marker_both (w->pointm, buffer, | |
5469 | XFASTINT (charpos), XFASTINT (bytepos)); | |
5470 | } | |
5471 | ||
5472 | Vwith_echo_area_save_vector = vector; | |
5473 | return Qnil; | |
5474 | } | |
5475 | ||
5476 | ||
5477 | /* Set up the echo area for use by print functions. MULTIBYTE_P | |
5478 | non-zero means we will print multibyte. */ | |
5479 | ||
5480 | void | |
5481 | setup_echo_area_for_printing (multibyte_p) | |
5482 | int multibyte_p; | |
5483 | { | |
5bcfeb49 GM |
5484 | ensure_echo_area_buffers (); |
5485 | ||
c6e89d6c GM |
5486 | if (!message_buf_print) |
5487 | { | |
5488 | /* A message has been output since the last time we printed. | |
5489 | Choose a fresh echo area buffer. */ | |
5490 | if (EQ (echo_area_buffer[1], echo_buffer[0])) | |
5491 | echo_area_buffer[0] = echo_buffer[1]; | |
5492 | else | |
5493 | echo_area_buffer[0] = echo_buffer[0]; | |
5494 | ||
5495 | /* Switch to that buffer and clear it. */ | |
5496 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5497 | if (Z > BEG) | |
5498 | del_range (BEG, Z); | |
5499 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5500 | ||
5501 | /* Set up the buffer for the multibyteness we need. */ | |
5502 | if (multibyte_p | |
5503 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5504 | Fset_buffer_multibyte (multibyte_p ? Qt : Qnil); | |
5505 | ||
5506 | /* Raise the frame containing the echo area. */ | |
5507 | if (minibuffer_auto_raise) | |
5508 | { | |
886bd6f2 | 5509 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5510 | Lisp_Object mini_window; |
886bd6f2 | 5511 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5512 | Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window))); |
5513 | } | |
5514 | ||
5515 | message_buf_print = 1; | |
5516 | } | |
5517 | else if (current_buffer != XBUFFER (echo_area_buffer[0])) | |
5518 | /* Someone switched buffers between print requests. */ | |
5519 | set_buffer_internal (XBUFFER (echo_area_buffer[0])); | |
5520 | } | |
5521 | ||
5522 | ||
dd2eb166 GM |
5523 | /* Display an echo area message in window W. Value is non-zero if W's |
5524 | height is changed. If display_last_displayed_message_p is | |
5525 | non-zero, display the message that was last displayed, otherwise | |
5526 | display the current message. */ | |
c6e89d6c GM |
5527 | |
5528 | static int | |
5529 | display_echo_area (w) | |
5530 | struct window *w; | |
5531 | { | |
dd2eb166 GM |
5532 | int i, no_message_p, window_height_changed_p; |
5533 | ||
5534 | /* If there is no message, we must call display_echo_area_1 | |
5535 | nevertheless because it resizes the window. But we will have to | |
5536 | reset the echo_area_buffer in question to nil at the end because | |
5537 | with_echo_area_buffer will sets it to an empty buffer. */ | |
5538 | i = display_last_displayed_message_p ? 1 : 0; | |
5539 | no_message_p = NILP (echo_area_buffer[i]); | |
5540 | ||
5541 | window_height_changed_p | |
5542 | = with_echo_area_buffer (w, display_last_displayed_message_p, | |
5543 | (int (*) ()) display_echo_area_1, w); | |
5544 | ||
5545 | if (no_message_p) | |
5546 | echo_area_buffer[i] = Qnil; | |
5547 | ||
5548 | return window_height_changed_p; | |
c6e89d6c GM |
5549 | } |
5550 | ||
5551 | ||
5552 | /* Helper for display_echo_area. Display the current buffer which | |
5553 | contains the current echo area message in window W, a mini-window. | |
5554 | Change the height of W so that all of the message is displayed. | |
5555 | Value is non-zero if height of W was changed. */ | |
5556 | ||
5557 | static int | |
5558 | display_echo_area_1 (w) | |
5559 | struct window *w; | |
5560 | { | |
5561 | Lisp_Object window; | |
c6e89d6c GM |
5562 | struct text_pos start; |
5563 | int window_height_changed_p = 0; | |
5564 | ||
5565 | /* Do this before displaying, so that we have a large enough glyph | |
5566 | matrix for the display. */ | |
92a90e89 | 5567 | window_height_changed_p = resize_mini_window (w, 0); |
c6e89d6c GM |
5568 | |
5569 | /* Display. */ | |
5570 | clear_glyph_matrix (w->desired_matrix); | |
5571 | XSETWINDOW (window, w); | |
5572 | SET_TEXT_POS (start, BEG, BEG_BYTE); | |
5573 | try_window (window, start); | |
5574 | ||
c6e89d6c GM |
5575 | return window_height_changed_p; |
5576 | } | |
5577 | ||
5578 | ||
92a90e89 GM |
5579 | /* Resize the echo area window to exactly the size needed for the |
5580 | currently displayed message, if there is one. */ | |
5581 | ||
5582 | void | |
5583 | resize_echo_area_axactly () | |
5584 | { | |
5585 | if (BUFFERP (echo_area_buffer[0]) | |
5586 | && WINDOWP (echo_area_window)) | |
5587 | { | |
5588 | struct window *w = XWINDOW (echo_area_window); | |
5589 | int resized_p; | |
5590 | ||
5591 | resized_p = with_echo_area_buffer (w, 0, | |
5592 | (int (*) ()) resize_mini_window, | |
5593 | w, 1); | |
5594 | if (resized_p) | |
5595 | { | |
5596 | ++windows_or_buffers_changed; | |
5597 | ++update_mode_lines; | |
5598 | redisplay_internal (0); | |
5599 | } | |
5600 | } | |
5601 | } | |
5602 | ||
5603 | ||
5604 | /* Resize mini-window W to fit the size of its contents. EXACT:P | |
5605 | means size the window exactly to the size needed. Otherwise, it's | |
5606 | only enlarged until W's buffer is empty. Value is non-zero if | |
5607 | the window height has been changed. */ | |
c6e89d6c | 5608 | |
9472f927 | 5609 | int |
92a90e89 | 5610 | resize_mini_window (w, exact_p) |
c6e89d6c | 5611 | struct window *w; |
92a90e89 | 5612 | int exact_p; |
c6e89d6c GM |
5613 | { |
5614 | struct frame *f = XFRAME (w->frame); | |
5615 | int window_height_changed_p = 0; | |
5616 | ||
5617 | xassert (MINI_WINDOW_P (w)); | |
97cafc0f GM |
5618 | |
5619 | /* Nil means don't try to resize. */ | |
00f6d59e GM |
5620 | if (NILP (Vmax_mini_window_height) |
5621 | || (FRAME_X_P (f) && f->output_data.x == NULL)) | |
97cafc0f | 5622 | return 0; |
c6e89d6c GM |
5623 | |
5624 | if (!FRAME_MINIBUF_ONLY_P (f)) | |
5625 | { | |
5626 | struct it it; | |
dd2eb166 GM |
5627 | struct window *root = XWINDOW (FRAME_ROOT_WINDOW (f)); |
5628 | int total_height = XFASTINT (root->height) + XFASTINT (w->height); | |
5629 | int height, max_height; | |
5630 | int unit = CANON_Y_UNIT (f); | |
5631 | struct text_pos start; | |
9142dd5b | 5632 | |
c6e89d6c | 5633 | init_iterator (&it, w, BEGV, BEGV_BYTE, NULL, DEFAULT_FACE_ID); |
c6e89d6c | 5634 | |
dd2eb166 GM |
5635 | /* Compute the max. number of lines specified by the user. */ |
5636 | if (FLOATP (Vmax_mini_window_height)) | |
5637 | max_height = XFLOATINT (Vmax_mini_window_height) * total_height; | |
5638 | else if (INTEGERP (Vmax_mini_window_height)) | |
5639 | max_height = XINT (Vmax_mini_window_height); | |
97cafc0f GM |
5640 | else |
5641 | max_height = total_height / 4; | |
dd2eb166 GM |
5642 | |
5643 | /* Correct that max. height if it's bogus. */ | |
5644 | max_height = max (1, max_height); | |
5645 | max_height = min (total_height, max_height); | |
5646 | ||
5647 | /* Find out the height of the text in the window. */ | |
55b064bd | 5648 | last_height = 0; |
dd2eb166 | 5649 | move_it_to (&it, ZV, -1, -1, -1, MOVE_TO_POS); |
55b064bd GM |
5650 | if (it.max_ascent == 0 && it.max_descent == 0) |
5651 | height = it.current_y + last_height; | |
5652 | else | |
5653 | height = it.current_y + it.max_ascent + it.max_descent; | |
5654 | height = (height + unit - 1) / unit; | |
dd2eb166 GM |
5655 | |
5656 | /* Compute a suitable window start. */ | |
5657 | if (height > max_height) | |
5658 | { | |
5659 | height = max_height; | |
5660 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
5661 | move_it_vertically_backward (&it, (height - 1) * unit); | |
5662 | start = it.current.pos; | |
5663 | } | |
5664 | else | |
5665 | SET_TEXT_POS (start, BEGV, BEGV_BYTE); | |
5666 | SET_MARKER_FROM_TEXT_POS (w->start, start); | |
c59c668a | 5667 | |
9472f927 GM |
5668 | /* Let it grow only, until we display an empty message, in which |
5669 | case the window shrinks again. */ | |
da448723 | 5670 | if (height > XFASTINT (w->height)) |
dd2eb166 | 5671 | { |
d2c48e86 | 5672 | int old_height = XFASTINT (w->height); |
da448723 GM |
5673 | freeze_window_starts (f, 1); |
5674 | grow_mini_window (w, height - XFASTINT (w->height)); | |
5675 | window_height_changed_p = XFASTINT (w->height) != old_height; | |
5676 | } | |
5677 | else if (height < XFASTINT (w->height) | |
5678 | && (exact_p || BEGV == ZV)) | |
5679 | { | |
5680 | int old_height = XFASTINT (w->height); | |
5681 | freeze_window_starts (f, 0); | |
5682 | shrink_mini_window (w); | |
d2c48e86 | 5683 | window_height_changed_p = XFASTINT (w->height) != old_height; |
9142dd5b | 5684 | } |
c6e89d6c GM |
5685 | } |
5686 | ||
5687 | return window_height_changed_p; | |
5688 | } | |
5689 | ||
5690 | ||
5691 | /* Value is the current message, a string, or nil if there is no | |
5692 | current message. */ | |
5693 | ||
5694 | Lisp_Object | |
5695 | current_message () | |
5696 | { | |
5697 | Lisp_Object msg; | |
5698 | ||
5699 | if (NILP (echo_area_buffer[0])) | |
5700 | msg = Qnil; | |
5701 | else | |
5702 | { | |
5703 | with_echo_area_buffer (0, 0, (int (*) ()) current_message_1, &msg); | |
5704 | if (NILP (msg)) | |
5705 | echo_area_buffer[0] = Qnil; | |
5706 | } | |
5707 | ||
5708 | return msg; | |
5709 | } | |
5710 | ||
5711 | ||
5712 | static int | |
5713 | current_message_1 (msg) | |
5714 | Lisp_Object *msg; | |
5715 | { | |
5716 | if (Z > BEG) | |
5717 | *msg = make_buffer_string (BEG, Z, 1); | |
5718 | else | |
5719 | *msg = Qnil; | |
5720 | return 0; | |
5721 | } | |
5722 | ||
5723 | ||
5724 | /* Push the current message on Vmessage_stack for later restauration | |
5725 | by restore_message. Value is non-zero if the current message isn't | |
5726 | empty. This is a relatively infrequent operation, so it's not | |
5727 | worth optimizing. */ | |
5728 | ||
5729 | int | |
5730 | push_message () | |
5731 | { | |
5732 | Lisp_Object msg; | |
5733 | msg = current_message (); | |
5734 | Vmessage_stack = Fcons (msg, Vmessage_stack); | |
5735 | return STRINGP (msg); | |
5736 | } | |
5737 | ||
5738 | ||
5739 | /* Restore message display from the top of Vmessage_stack. */ | |
5740 | ||
5741 | void | |
5742 | restore_message () | |
5743 | { | |
5744 | Lisp_Object msg; | |
5745 | ||
5746 | xassert (CONSP (Vmessage_stack)); | |
5747 | msg = XCAR (Vmessage_stack); | |
5748 | if (STRINGP (msg)) | |
5749 | message3_nolog (msg, STRING_BYTES (XSTRING (msg)), STRING_MULTIBYTE (msg)); | |
5750 | else | |
5751 | message3_nolog (msg, 0, 0); | |
5752 | } | |
5753 | ||
5754 | ||
5755 | /* Pop the top-most entry off Vmessage_stack. */ | |
5756 | ||
5757 | void | |
5758 | pop_message () | |
5759 | { | |
5760 | xassert (CONSP (Vmessage_stack)); | |
5761 | Vmessage_stack = XCDR (Vmessage_stack); | |
5762 | } | |
5763 | ||
5764 | ||
5765 | /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs | |
5766 | exits. If the stack is not empty, we have a missing pop_message | |
5767 | somewhere. */ | |
5768 | ||
5769 | void | |
5770 | check_message_stack () | |
5771 | { | |
5772 | if (!NILP (Vmessage_stack)) | |
5773 | abort (); | |
5774 | } | |
5775 | ||
5776 | ||
5777 | /* Truncate to NCHARS what will be displayed in the echo area the next | |
5778 | time we display it---but don't redisplay it now. */ | |
5779 | ||
5780 | void | |
5781 | truncate_echo_area (nchars) | |
5782 | int nchars; | |
5783 | { | |
5784 | if (nchars == 0) | |
5785 | echo_area_buffer[0] = Qnil; | |
5786 | /* A null message buffer means that the frame hasn't really been | |
5787 | initialized yet. Error messages get reported properly by | |
5788 | cmd_error, so this must be just an informative message; toss it. */ | |
5789 | else if (!noninteractive | |
5790 | && INTERACTIVE | |
c6e89d6c | 5791 | && !NILP (echo_area_buffer[0])) |
886bd6f2 GM |
5792 | { |
5793 | struct frame *sf = SELECTED_FRAME (); | |
5794 | if (FRAME_MESSAGE_BUF (sf)) | |
5795 | with_echo_area_buffer (0, 0, (int (*) ()) truncate_message_1, nchars); | |
5796 | } | |
c6e89d6c GM |
5797 | } |
5798 | ||
5799 | ||
5800 | /* Helper function for truncate_echo_area. Truncate the current | |
5801 | message to at most NCHARS characters. */ | |
5802 | ||
5803 | static int | |
5804 | truncate_message_1 (nchars) | |
5805 | int nchars; | |
5806 | { | |
5807 | if (BEG + nchars < Z) | |
5808 | del_range (BEG + nchars, Z); | |
5809 | if (Z == BEG) | |
5810 | echo_area_buffer[0] = Qnil; | |
5811 | return 0; | |
5812 | } | |
5813 | ||
5814 | ||
5815 | /* Set the current message to a substring of S or STRING. | |
5816 | ||
5817 | If STRING is a Lisp string, set the message to the first NBYTES | |
5818 | bytes from STRING. NBYTES zero means use the whole string. If | |
5819 | STRING is multibyte, the message will be displayed multibyte. | |
5820 | ||
5821 | If S is not null, set the message to the first LEN bytes of S. LEN | |
5822 | zero means use the whole string. MULTIBYTE_P non-zero means S is | |
5823 | multibyte. Display the message multibyte in that case. */ | |
5824 | ||
5825 | void | |
5826 | set_message (s, string, nbytes, multibyte_p) | |
5827 | char *s; | |
5828 | Lisp_Object string; | |
5829 | int nbytes; | |
5830 | { | |
5831 | message_enable_multibyte | |
5832 | = ((s && multibyte_p) | |
5833 | || (STRINGP (string) && STRING_MULTIBYTE (string))); | |
5834 | ||
5835 | with_echo_area_buffer (0, -1, (int (*) ()) set_message_1, | |
5836 | s, string, nbytes, multibyte_p); | |
5837 | message_buf_print = 0; | |
5838 | } | |
5839 | ||
5840 | ||
5841 | /* Helper function for set_message. Arguments have the same meaning | |
5842 | as there. This function is called with the echo area buffer being | |
5843 | current. */ | |
5844 | ||
5845 | static int | |
5846 | set_message_1 (s, string, nbytes, multibyte_p) | |
5847 | char *s; | |
5848 | Lisp_Object string; | |
5849 | int nbytes, multibyte_p; | |
5850 | { | |
5851 | xassert (BEG == Z); | |
5852 | ||
5853 | /* Change multibyteness of the echo buffer appropriately. */ | |
5854 | if (message_enable_multibyte | |
5855 | != !NILP (current_buffer->enable_multibyte_characters)) | |
5856 | Fset_buffer_multibyte (message_enable_multibyte ? Qt : Qnil); | |
5857 | ||
5858 | /* Insert new message at BEG. */ | |
5859 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
5860 | ||
5861 | if (STRINGP (string)) | |
5862 | { | |
5863 | int nchars; | |
5864 | ||
5865 | if (nbytes == 0) | |
5866 | nbytes = XSTRING (string)->size_byte; | |
5867 | nchars = string_byte_to_char (string, nbytes); | |
5868 | ||
5869 | /* This function takes care of single/multibyte conversion. We | |
5870 | just have to ensure that the echo area buffer has the right | |
5871 | setting of enable_multibyte_characters. */ | |
5872 | insert_from_string (string, 0, 0, nchars, nbytes, 1); | |
5873 | } | |
5874 | else if (s) | |
5875 | { | |
5876 | if (nbytes == 0) | |
5877 | nbytes = strlen (s); | |
5878 | ||
5879 | if (multibyte_p && NILP (current_buffer->enable_multibyte_characters)) | |
5880 | { | |
5881 | /* Convert from multi-byte to single-byte. */ | |
5882 | int i, c, n; | |
5883 | unsigned char work[1]; | |
5884 | ||
5885 | /* Convert a multibyte string to single-byte. */ | |
5886 | for (i = 0; i < nbytes; i += n) | |
5887 | { | |
5888 | c = string_char_and_length (s + i, nbytes - i, &n); | |
5889 | work[0] = (SINGLE_BYTE_CHAR_P (c) | |
5890 | ? c | |
5891 | : multibyte_char_to_unibyte (c, Qnil)); | |
5892 | insert_1_both (work, 1, 1, 1, 0, 0); | |
5893 | } | |
5894 | } | |
5895 | else if (!multibyte_p | |
5896 | && !NILP (current_buffer->enable_multibyte_characters)) | |
5897 | { | |
5898 | /* Convert from single-byte to multi-byte. */ | |
5899 | int i, c, n; | |
5900 | unsigned char *msg = (unsigned char *) s; | |
260a86a0 | 5901 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
c6e89d6c GM |
5902 | |
5903 | /* Convert a single-byte string to multibyte. */ | |
5904 | for (i = 0; i < nbytes; i++) | |
5905 | { | |
5906 | c = unibyte_char_to_multibyte (msg[i]); | |
260a86a0 KH |
5907 | n = CHAR_STRING (c, str); |
5908 | insert_1_both (str, 1, n, 1, 0, 0); | |
c6e89d6c GM |
5909 | } |
5910 | } | |
5911 | else | |
5912 | insert_1 (s, nbytes, 1, 0, 0); | |
5913 | } | |
5914 | ||
5915 | return 0; | |
5916 | } | |
5917 | ||
5918 | ||
5919 | /* Clear messages. CURRENT_P non-zero means clear the current | |
5920 | message. LAST_DISPLAYED_P non-zero means clear the message | |
5921 | last displayed. */ | |
5922 | ||
5923 | void | |
5924 | clear_message (current_p, last_displayed_p) | |
5925 | int current_p, last_displayed_p; | |
5926 | { | |
5927 | if (current_p) | |
5928 | echo_area_buffer[0] = Qnil; | |
5929 | ||
5930 | if (last_displayed_p) | |
5931 | echo_area_buffer[1] = Qnil; | |
5932 | ||
5933 | message_buf_print = 0; | |
5934 | } | |
5935 | ||
5936 | /* Clear garbaged frames. | |
5937 | ||
5938 | This function is used where the old redisplay called | |
5939 | redraw_garbaged_frames which in turn called redraw_frame which in | |
5940 | turn called clear_frame. The call to clear_frame was a source of | |
5941 | flickering. I believe a clear_frame is not necessary. It should | |
5942 | suffice in the new redisplay to invalidate all current matrices, | |
5943 | and ensure a complete redisplay of all windows. */ | |
5944 | ||
5945 | static void | |
5946 | clear_garbaged_frames () | |
5947 | { | |
5f5c8ee5 GM |
5948 | if (frame_garbaged) |
5949 | { | |
5f5c8ee5 GM |
5950 | Lisp_Object tail, frame; |
5951 | ||
5952 | FOR_EACH_FRAME (tail, frame) | |
5953 | { | |
5954 | struct frame *f = XFRAME (frame); | |
5955 | ||
5956 | if (FRAME_VISIBLE_P (f) && FRAME_GARBAGED_P (f)) | |
5957 | { | |
5958 | clear_current_matrices (f); | |
5959 | f->garbaged = 0; | |
5960 | } | |
5961 | } | |
5962 | ||
5963 | frame_garbaged = 0; | |
5964 | ++windows_or_buffers_changed; | |
5965 | } | |
c6e89d6c | 5966 | } |
5f5c8ee5 | 5967 | |
5f5c8ee5 | 5968 | |
886bd6f2 GM |
5969 | /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P |
5970 | is non-zero update selected_frame. Value is non-zero if the | |
c6e89d6c | 5971 | mini-windows height has been changed. */ |
5f5c8ee5 | 5972 | |
c6e89d6c GM |
5973 | static int |
5974 | echo_area_display (update_frame_p) | |
5975 | int update_frame_p; | |
5976 | { | |
5977 | Lisp_Object mini_window; | |
5978 | struct window *w; | |
5979 | struct frame *f; | |
5980 | int window_height_changed_p = 0; | |
886bd6f2 | 5981 | struct frame *sf = SELECTED_FRAME (); |
c6e89d6c | 5982 | |
886bd6f2 | 5983 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
c6e89d6c GM |
5984 | w = XWINDOW (mini_window); |
5985 | f = XFRAME (WINDOW_FRAME (w)); | |
5986 | ||
5987 | /* Don't display if frame is invisible or not yet initialized. */ | |
5988 | if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p) | |
5989 | return 0; | |
5f5c8ee5 | 5990 | |
1ab3e082 | 5991 | #ifdef HAVE_WINDOW_SYSTEM |
c6e89d6c GM |
5992 | /* When Emacs starts, selected_frame may be a visible terminal |
5993 | frame, even if we run under a window system. If we let this | |
5994 | through, a message would be displayed on the terminal. */ | |
622e3754 GM |
5995 | if (EQ (selected_frame, Vterminal_frame) |
5996 | && !NILP (Vwindow_system)) | |
c6e89d6c | 5997 | return 0; |
1ab3e082 | 5998 | #endif /* HAVE_WINDOW_SYSTEM */ |
c6e89d6c GM |
5999 | |
6000 | /* Redraw garbaged frames. */ | |
6001 | if (frame_garbaged) | |
6002 | clear_garbaged_frames (); | |
6003 | ||
6004 | if (!NILP (echo_area_buffer[0]) || minibuf_level == 0) | |
6005 | { | |
6006 | echo_area_window = mini_window; | |
6007 | window_height_changed_p = display_echo_area (w); | |
5f5c8ee5 | 6008 | w->must_be_updated_p = 1; |
c59c668a | 6009 | |
5f5c8ee5 GM |
6010 | if (update_frame_p) |
6011 | { | |
c59c668a GM |
6012 | /* Not called from redisplay_internal. If we changed |
6013 | window configuration, we must redisplay thoroughly. | |
6014 | Otherwise, we can do with updating what we displayed | |
6015 | above. */ | |
6016 | if (window_height_changed_p) | |
6017 | { | |
6018 | ++windows_or_buffers_changed; | |
6019 | ++update_mode_lines; | |
6020 | redisplay_internal (0); | |
6021 | } | |
6022 | else if (FRAME_WINDOW_P (f)) | |
5f5c8ee5 GM |
6023 | { |
6024 | update_single_window (w, 1); | |
6025 | rif->flush_display (f); | |
6026 | } | |
6027 | else | |
6028 | update_frame (f, 1, 1); | |
6029 | } | |
6030 | } | |
6031 | else if (!EQ (mini_window, selected_window)) | |
6032 | windows_or_buffers_changed++; | |
c59c668a GM |
6033 | |
6034 | /* Last displayed message is now the current message. */ | |
dd2eb166 GM |
6035 | echo_area_buffer[1] = echo_area_buffer[0]; |
6036 | ||
5f5c8ee5 GM |
6037 | /* Prevent redisplay optimization in redisplay_internal by resetting |
6038 | this_line_start_pos. This is done because the mini-buffer now | |
6039 | displays the message instead of its buffer text. */ | |
6040 | if (EQ (mini_window, selected_window)) | |
6041 | CHARPOS (this_line_start_pos) = 0; | |
c6e89d6c GM |
6042 | |
6043 | return window_height_changed_p; | |
5f5c8ee5 GM |
6044 | } |
6045 | ||
6046 | ||
6047 | \f | |
6048 | /*********************************************************************** | |
6049 | Frame Titles | |
6050 | ***********************************************************************/ | |
6051 | ||
6052 | ||
6053 | #ifdef HAVE_WINDOW_SYSTEM | |
6054 | ||
6055 | /* A buffer for constructing frame titles in it; allocated from the | |
6056 | heap in init_xdisp and resized as needed in store_frame_title_char. */ | |
6057 | ||
6058 | static char *frame_title_buf; | |
6059 | ||
6060 | /* The buffer's end, and a current output position in it. */ | |
6061 | ||
6062 | static char *frame_title_buf_end; | |
6063 | static char *frame_title_ptr; | |
6064 | ||
6065 | ||
6066 | /* Store a single character C for the frame title in frame_title_buf. | |
6067 | Re-allocate frame_title_buf if necessary. */ | |
6068 | ||
6069 | static void | |
6070 | store_frame_title_char (c) | |
6071 | char c; | |
6072 | { | |
6073 | /* If output position has reached the end of the allocated buffer, | |
6074 | double the buffer's size. */ | |
6075 | if (frame_title_ptr == frame_title_buf_end) | |
6076 | { | |
6077 | int len = frame_title_ptr - frame_title_buf; | |
6078 | int new_size = 2 * len * sizeof *frame_title_buf; | |
6079 | frame_title_buf = (char *) xrealloc (frame_title_buf, new_size); | |
6080 | frame_title_buf_end = frame_title_buf + new_size; | |
6081 | frame_title_ptr = frame_title_buf + len; | |
6082 | } | |
6083 | ||
6084 | *frame_title_ptr++ = c; | |
6085 | } | |
6086 | ||
6087 | ||
6088 | /* Store part of a frame title in frame_title_buf, beginning at | |
6089 | frame_title_ptr. STR is the string to store. Do not copy more | |
6090 | than PRECISION number of bytes from STR; PRECISION <= 0 means copy | |
6091 | the whole string. Pad with spaces until FIELD_WIDTH number of | |
6092 | characters have been copied; FIELD_WIDTH <= 0 means don't pad. | |
6093 | Called from display_mode_element when it is used to build a frame | |
6094 | title. */ | |
6095 | ||
6096 | static int | |
6097 | store_frame_title (str, field_width, precision) | |
6098 | unsigned char *str; | |
6099 | int field_width, precision; | |
6100 | { | |
6101 | int n = 0; | |
6102 | ||
6103 | /* Copy at most PRECISION chars from STR. */ | |
6104 | while ((precision <= 0 || n < precision) | |
6105 | && *str) | |
6106 | { | |
6107 | store_frame_title_char (*str++); | |
6108 | ++n; | |
6109 | } | |
6110 | ||
6111 | /* Fill up with spaces until FIELD_WIDTH reached. */ | |
6112 | while (field_width > 0 | |
6113 | && n < field_width) | |
6114 | { | |
6115 | store_frame_title_char (' '); | |
6116 | ++n; | |
6117 | } | |
6118 | ||
6119 | return n; | |
6120 | } | |
6121 | ||
6122 | ||
6123 | /* Set the title of FRAME, if it has changed. The title format is | |
6124 | Vicon_title_format if FRAME is iconified, otherwise it is | |
6125 | frame_title_format. */ | |
6126 | ||
6127 | static void | |
6128 | x_consider_frame_title (frame) | |
6129 | Lisp_Object frame; | |
6130 | { | |
6131 | struct frame *f = XFRAME (frame); | |
6132 | ||
6133 | if (FRAME_WINDOW_P (f) | |
6134 | || FRAME_MINIBUF_ONLY_P (f) | |
6135 | || f->explicit_name) | |
6136 | { | |
6137 | /* Do we have more than one visible frame on this X display? */ | |
6138 | Lisp_Object tail; | |
6139 | Lisp_Object fmt; | |
6140 | struct buffer *obuf; | |
6141 | int len; | |
6142 | struct it it; | |
6143 | ||
9472f927 | 6144 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
5f5c8ee5 | 6145 | { |
9472f927 | 6146 | struct frame *tf = XFRAME (XCAR (tail)); |
5f5c8ee5 GM |
6147 | |
6148 | if (tf != f | |
6149 | && FRAME_KBOARD (tf) == FRAME_KBOARD (f) | |
6150 | && !FRAME_MINIBUF_ONLY_P (tf) | |
6151 | && (FRAME_VISIBLE_P (tf) || FRAME_ICONIFIED_P (tf))) | |
6152 | break; | |
6153 | } | |
6154 | ||
6155 | /* Set global variable indicating that multiple frames exist. */ | |
6156 | multiple_frames = CONSP (tail); | |
6157 | ||
6158 | /* Switch to the buffer of selected window of the frame. Set up | |
6159 | frame_title_ptr so that display_mode_element will output into it; | |
6160 | then display the title. */ | |
6161 | obuf = current_buffer; | |
6162 | Fset_buffer (XWINDOW (f->selected_window)->buffer); | |
6163 | fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format; | |
6164 | frame_title_ptr = frame_title_buf; | |
6165 | init_iterator (&it, XWINDOW (f->selected_window), -1, -1, | |
6166 | NULL, DEFAULT_FACE_ID); | |
6167 | len = display_mode_element (&it, 0, -1, -1, fmt); | |
6168 | frame_title_ptr = NULL; | |
6169 | set_buffer_internal (obuf); | |
6170 | ||
6171 | /* Set the title only if it's changed. This avoids consing in | |
6172 | the common case where it hasn't. (If it turns out that we've | |
6173 | already wasted too much time by walking through the list with | |
6174 | display_mode_element, then we might need to optimize at a | |
6175 | higher level than this.) */ | |
6176 | if (! STRINGP (f->name) | |
6177 | || STRING_BYTES (XSTRING (f->name)) != len | |
6178 | || bcmp (frame_title_buf, XSTRING (f->name)->data, len) != 0) | |
6179 | x_implicitly_set_name (f, make_string (frame_title_buf, len), Qnil); | |
6180 | } | |
6181 | } | |
6182 | ||
6183 | #else /* not HAVE_WINDOW_SYSTEM */ | |
6184 | ||
6185 | #define frame_title_ptr ((char *)0) | |
6186 | #define store_frame_title(str, mincol, maxcol) 0 | |
6187 | ||
6188 | #endif /* not HAVE_WINDOW_SYSTEM */ | |
6189 | ||
6190 | ||
6191 | ||
6192 | \f | |
6193 | /*********************************************************************** | |
6194 | Menu Bars | |
6195 | ***********************************************************************/ | |
6196 | ||
6197 | ||
6198 | /* Prepare for redisplay by updating menu-bar item lists when | |
6199 | appropriate. This can call eval. */ | |
6200 | ||
6201 | void | |
6202 | prepare_menu_bars () | |
6203 | { | |
6204 | int all_windows; | |
6205 | struct gcpro gcpro1, gcpro2; | |
6206 | struct frame *f; | |
6207 | struct frame *tooltip_frame; | |
6208 | ||
6209 | #ifdef HAVE_X_WINDOWS | |
6210 | tooltip_frame = tip_frame; | |
6211 | #else | |
6212 | tooltip_frame = NULL; | |
6213 | #endif | |
6214 | ||
6215 | /* Update all frame titles based on their buffer names, etc. We do | |
6216 | this before the menu bars so that the buffer-menu will show the | |
6217 | up-to-date frame titles. */ | |
6218 | #ifdef HAVE_WINDOW_SYSTEM | |
6219 | if (windows_or_buffers_changed || update_mode_lines) | |
6220 | { | |
6221 | Lisp_Object tail, frame; | |
6222 | ||
6223 | FOR_EACH_FRAME (tail, frame) | |
6224 | { | |
6225 | f = XFRAME (frame); | |
6226 | if (f != tooltip_frame | |
6227 | && (FRAME_VISIBLE_P (f) || FRAME_ICONIFIED_P (f))) | |
6228 | x_consider_frame_title (frame); | |
6229 | } | |
6230 | } | |
6231 | #endif /* HAVE_WINDOW_SYSTEM */ | |
6232 | ||
6233 | /* Update the menu bar item lists, if appropriate. This has to be | |
6234 | done before any actual redisplay or generation of display lines. */ | |
6235 | all_windows = (update_mode_lines | |
6236 | || buffer_shared > 1 | |
6237 | || windows_or_buffers_changed); | |
6238 | if (all_windows) | |
6239 | { | |
6240 | Lisp_Object tail, frame; | |
6241 | int count = specpdl_ptr - specpdl; | |
6242 | ||
6243 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6244 | ||
6245 | FOR_EACH_FRAME (tail, frame) | |
6246 | { | |
6247 | f = XFRAME (frame); | |
6248 | ||
6249 | /* Ignore tooltip frame. */ | |
6250 | if (f == tooltip_frame) | |
6251 | continue; | |
6252 | ||
6253 | /* If a window on this frame changed size, report that to | |
6254 | the user and clear the size-change flag. */ | |
6255 | if (FRAME_WINDOW_SIZES_CHANGED (f)) | |
6256 | { | |
6257 | Lisp_Object functions; | |
6258 | ||
6259 | /* Clear flag first in case we get an error below. */ | |
6260 | FRAME_WINDOW_SIZES_CHANGED (f) = 0; | |
6261 | functions = Vwindow_size_change_functions; | |
6262 | GCPRO2 (tail, functions); | |
6263 | ||
6264 | while (CONSP (functions)) | |
6265 | { | |
6266 | call1 (XCAR (functions), frame); | |
6267 | functions = XCDR (functions); | |
6268 | } | |
6269 | UNGCPRO; | |
6270 | } | |
6271 | ||
6272 | GCPRO1 (tail); | |
6273 | update_menu_bar (f, 0); | |
6274 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec | 6275 | update_tool_bar (f, 0); |
5f5c8ee5 GM |
6276 | #endif |
6277 | UNGCPRO; | |
6278 | } | |
6279 | ||
6280 | unbind_to (count, Qnil); | |
6281 | } | |
6282 | else | |
6283 | { | |
886bd6f2 GM |
6284 | struct frame *sf = SELECTED_FRAME (); |
6285 | update_menu_bar (sf, 1); | |
5f5c8ee5 | 6286 | #ifdef HAVE_WINDOW_SYSTEM |
886bd6f2 | 6287 | update_tool_bar (sf, 1); |
5f5c8ee5 GM |
6288 | #endif |
6289 | } | |
6290 | ||
6291 | /* Motif needs this. See comment in xmenu.c. Turn it off when | |
6292 | pending_menu_activation is not defined. */ | |
6293 | #ifdef USE_X_TOOLKIT | |
6294 | pending_menu_activation = 0; | |
6295 | #endif | |
6296 | } | |
6297 | ||
6298 | ||
6299 | /* Update the menu bar item list for frame F. This has to be done | |
6300 | before we start to fill in any display lines, because it can call | |
6301 | eval. | |
6302 | ||
6303 | If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */ | |
6304 | ||
6305 | static void | |
6306 | update_menu_bar (f, save_match_data) | |
6307 | struct frame *f; | |
6308 | int save_match_data; | |
6309 | { | |
6310 | Lisp_Object window; | |
6311 | register struct window *w; | |
6312 | ||
6313 | window = FRAME_SELECTED_WINDOW (f); | |
6314 | w = XWINDOW (window); | |
6315 | ||
6316 | if (update_mode_lines) | |
6317 | w->update_mode_line = Qt; | |
6318 | ||
6319 | if (FRAME_WINDOW_P (f) | |
6320 | ? | |
6321 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6322 | FRAME_EXTERNAL_MENU_BAR (f) | |
6323 | #else | |
6324 | FRAME_MENU_BAR_LINES (f) > 0 | |
6325 | #endif | |
6326 | : FRAME_MENU_BAR_LINES (f) > 0) | |
6327 | { | |
6328 | /* If the user has switched buffers or windows, we need to | |
6329 | recompute to reflect the new bindings. But we'll | |
6330 | recompute when update_mode_lines is set too; that means | |
6331 | that people can use force-mode-line-update to request | |
6332 | that the menu bar be recomputed. The adverse effect on | |
6333 | the rest of the redisplay algorithm is about the same as | |
6334 | windows_or_buffers_changed anyway. */ | |
6335 | if (windows_or_buffers_changed | |
6336 | || !NILP (w->update_mode_line) | |
6337 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6338 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6339 | != !NILP (w->last_had_star)) | |
6340 | || ((!NILP (Vtransient_mark_mode) | |
6341 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6342 | != !NILP (w->region_showing))) | |
6343 | { | |
6344 | struct buffer *prev = current_buffer; | |
6345 | int count = specpdl_ptr - specpdl; | |
6346 | ||
6347 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
6348 | if (save_match_data) | |
6349 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6350 | if (NILP (Voverriding_local_map_menu_flag)) | |
6351 | { | |
6352 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6353 | specbind (Qoverriding_local_map, Qnil); | |
6354 | } | |
6355 | ||
6356 | /* Run the Lucid hook. */ | |
6357 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
6358 | ||
6359 | /* If it has changed current-menubar from previous value, | |
6360 | really recompute the menu-bar from the value. */ | |
6361 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
6362 | call0 (Qrecompute_lucid_menubar); | |
6363 | ||
6364 | safe_run_hooks (Qmenu_bar_update_hook); | |
6365 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f)); | |
6366 | ||
6367 | /* Redisplay the menu bar in case we changed it. */ | |
6368 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) | |
6369 | if (FRAME_WINDOW_P (f)) | |
6370 | set_frame_menubar (f, 0, 0); | |
6371 | else | |
6372 | /* On a terminal screen, the menu bar is an ordinary screen | |
6373 | line, and this makes it get updated. */ | |
6374 | w->update_mode_line = Qt; | |
6375 | #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6376 | /* In the non-toolkit version, the menu bar is an ordinary screen | |
6377 | line, and this makes it get updated. */ | |
6378 | w->update_mode_line = Qt; | |
6379 | #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */ | |
6380 | ||
6381 | unbind_to (count, Qnil); | |
6382 | set_buffer_internal_1 (prev); | |
6383 | } | |
6384 | } | |
6385 | } | |
6386 | ||
6387 | ||
6388 | \f | |
6389 | /*********************************************************************** | |
e037b9ec | 6390 | Tool-bars |
5f5c8ee5 GM |
6391 | ***********************************************************************/ |
6392 | ||
6393 | #ifdef HAVE_WINDOW_SYSTEM | |
6394 | ||
e037b9ec | 6395 | /* Update the tool-bar item list for frame F. This has to be done |
5f5c8ee5 GM |
6396 | before we start to fill in any display lines. Called from |
6397 | prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save | |
6398 | and restore it here. */ | |
6399 | ||
6400 | static void | |
e037b9ec | 6401 | update_tool_bar (f, save_match_data) |
5f5c8ee5 GM |
6402 | struct frame *f; |
6403 | int save_match_data; | |
6404 | { | |
e037b9ec GM |
6405 | if (WINDOWP (f->tool_bar_window) |
6406 | && XFASTINT (XWINDOW (f->tool_bar_window)->height) > 0) | |
5f5c8ee5 GM |
6407 | { |
6408 | Lisp_Object window; | |
6409 | struct window *w; | |
6410 | ||
6411 | window = FRAME_SELECTED_WINDOW (f); | |
6412 | w = XWINDOW (window); | |
6413 | ||
6414 | /* If the user has switched buffers or windows, we need to | |
6415 | recompute to reflect the new bindings. But we'll | |
6416 | recompute when update_mode_lines is set too; that means | |
6417 | that people can use force-mode-line-update to request | |
6418 | that the menu bar be recomputed. The adverse effect on | |
6419 | the rest of the redisplay algorithm is about the same as | |
6420 | windows_or_buffers_changed anyway. */ | |
6421 | if (windows_or_buffers_changed | |
6422 | || !NILP (w->update_mode_line) | |
6423 | || ((BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
6424 | < BUF_MODIFF (XBUFFER (w->buffer))) | |
6425 | != !NILP (w->last_had_star)) | |
6426 | || ((!NILP (Vtransient_mark_mode) | |
6427 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
6428 | != !NILP (w->region_showing))) | |
6429 | { | |
6430 | struct buffer *prev = current_buffer; | |
6431 | int count = specpdl_ptr - specpdl; | |
a2889657 | 6432 | |
5f5c8ee5 GM |
6433 | /* Set current_buffer to the buffer of the selected |
6434 | window of the frame, so that we get the right local | |
6435 | keymaps. */ | |
6436 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
1f40cad2 | 6437 | |
5f5c8ee5 GM |
6438 | /* Save match data, if we must. */ |
6439 | if (save_match_data) | |
6440 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
6441 | ||
6442 | /* Make sure that we don't accidentally use bogus keymaps. */ | |
6443 | if (NILP (Voverriding_local_map_menu_flag)) | |
6444 | { | |
6445 | specbind (Qoverriding_terminal_local_map, Qnil); | |
6446 | specbind (Qoverriding_local_map, Qnil); | |
1f40cad2 | 6447 | } |
1f40cad2 | 6448 | |
e037b9ec GM |
6449 | /* Build desired tool-bar items from keymaps. */ |
6450 | f->desired_tool_bar_items | |
6451 | = tool_bar_items (f->desired_tool_bar_items, | |
6452 | &f->n_desired_tool_bar_items); | |
5f5c8ee5 | 6453 | |
e037b9ec | 6454 | /* Redisplay the tool-bar in case we changed it. */ |
5f5c8ee5 GM |
6455 | w->update_mode_line = Qt; |
6456 | ||
6457 | unbind_to (count, Qnil); | |
6458 | set_buffer_internal_1 (prev); | |
81d478f3 | 6459 | } |
a2889657 JB |
6460 | } |
6461 | } | |
6462 | ||
6c4429a5 | 6463 | |
e037b9ec GM |
6464 | /* Set F->desired_tool_bar_string to a Lisp string representing frame |
6465 | F's desired tool-bar contents. F->desired_tool_bar_items must have | |
5f5c8ee5 GM |
6466 | been set up previously by calling prepare_menu_bars. */ |
6467 | ||
a2889657 | 6468 | static void |
e037b9ec | 6469 | build_desired_tool_bar_string (f) |
5f5c8ee5 | 6470 | struct frame *f; |
a2889657 | 6471 | { |
5f5c8ee5 GM |
6472 | int i, size, size_needed, string_idx; |
6473 | struct gcpro gcpro1, gcpro2, gcpro3; | |
6474 | Lisp_Object image, plist, props; | |
a2889657 | 6475 | |
5f5c8ee5 GM |
6476 | image = plist = props = Qnil; |
6477 | GCPRO3 (image, plist, props); | |
a2889657 | 6478 | |
e037b9ec | 6479 | /* Prepare F->desired_tool_bar_string. If we can reuse it, do so. |
5f5c8ee5 GM |
6480 | Otherwise, make a new string. */ |
6481 | ||
6482 | /* The size of the string we might be able to reuse. */ | |
e037b9ec GM |
6483 | size = (STRINGP (f->desired_tool_bar_string) |
6484 | ? XSTRING (f->desired_tool_bar_string)->size | |
5f5c8ee5 GM |
6485 | : 0); |
6486 | ||
6487 | /* Each image in the string we build is preceded by a space, | |
6488 | and there is a space at the end. */ | |
e037b9ec | 6489 | size_needed = f->n_desired_tool_bar_items + 1; |
5f5c8ee5 | 6490 | |
e037b9ec | 6491 | /* Reuse f->desired_tool_bar_string, if possible. */ |
5f5c8ee5 | 6492 | if (size < size_needed) |
e037b9ec | 6493 | f->desired_tool_bar_string = Fmake_string (make_number (size_needed), ' '); |
5f5c8ee5 GM |
6494 | else |
6495 | { | |
6496 | props = list4 (Qdisplay, Qnil, Qmenu_item, Qnil); | |
6497 | Fremove_text_properties (make_number (0), make_number (size), | |
e037b9ec | 6498 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6499 | } |
a2889657 | 6500 | |
5f5c8ee5 | 6501 | /* Put a `display' property on the string for the images to display, |
e037b9ec GM |
6502 | put a `menu_item' property on tool-bar items with a value that |
6503 | is the index of the item in F's tool-bar item vector. */ | |
5f5c8ee5 | 6504 | for (i = 0, string_idx = 0; |
e037b9ec | 6505 | i < f->n_desired_tool_bar_items; |
5f5c8ee5 | 6506 | ++i, string_idx += 1) |
a2889657 | 6507 | { |
5f5c8ee5 | 6508 | #define PROP(IDX) \ |
e037b9ec GM |
6509 | (XVECTOR (f->desired_tool_bar_items) \ |
6510 | ->contents[i * TOOL_BAR_ITEM_NSLOTS + (IDX)]) | |
5f5c8ee5 | 6511 | |
e037b9ec GM |
6512 | int enabled_p = !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P)); |
6513 | int selected_p = !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P)); | |
5f5c8ee5 GM |
6514 | int margin, relief; |
6515 | extern Lisp_Object QCrelief, QCmargin, QCalgorithm, Qimage; | |
6516 | extern Lisp_Object Qlaplace; | |
6517 | ||
6518 | /* If image is a vector, choose the image according to the | |
6519 | button state. */ | |
e037b9ec | 6520 | image = PROP (TOOL_BAR_ITEM_IMAGES); |
5f5c8ee5 GM |
6521 | if (VECTORP (image)) |
6522 | { | |
e037b9ec | 6523 | enum tool_bar_item_image idx; |
5f5c8ee5 GM |
6524 | |
6525 | if (enabled_p) | |
6526 | idx = (selected_p | |
e037b9ec GM |
6527 | ? TOOL_BAR_IMAGE_ENABLED_SELECTED |
6528 | : TOOL_BAR_IMAGE_ENABLED_DESELECTED); | |
5f5c8ee5 GM |
6529 | else |
6530 | idx = (selected_p | |
e037b9ec GM |
6531 | ? TOOL_BAR_IMAGE_DISABLED_SELECTED |
6532 | : TOOL_BAR_IMAGE_DISABLED_DESELECTED); | |
5f5c8ee5 GM |
6533 | |
6534 | xassert (XVECTOR (image)->size >= idx); | |
6535 | image = XVECTOR (image)->contents[idx]; | |
6536 | } | |
6537 | ||
6538 | /* Ignore invalid image specifications. */ | |
6539 | if (!valid_image_p (image)) | |
6540 | continue; | |
6541 | ||
e037b9ec | 6542 | /* Display the tool-bar button pressed, or depressed. */ |
5f5c8ee5 GM |
6543 | plist = Fcopy_sequence (XCDR (image)); |
6544 | ||
6545 | /* Compute margin and relief to draw. */ | |
e037b9ec GM |
6546 | relief = tool_bar_button_relief > 0 ? tool_bar_button_relief : 3; |
6547 | margin = relief + max (0, tool_bar_button_margin); | |
5f5c8ee5 | 6548 | |
e037b9ec | 6549 | if (auto_raise_tool_bar_buttons_p) |
5f5c8ee5 GM |
6550 | { |
6551 | /* Add a `:relief' property to the image spec if the item is | |
6552 | selected. */ | |
6553 | if (selected_p) | |
6554 | { | |
6555 | plist = Fplist_put (plist, QCrelief, make_number (-relief)); | |
6556 | margin -= relief; | |
6557 | } | |
6558 | } | |
6559 | else | |
6560 | { | |
6561 | /* If image is selected, display it pressed, i.e. with a | |
6562 | negative relief. If it's not selected, display it with a | |
6563 | raised relief. */ | |
6564 | plist = Fplist_put (plist, QCrelief, | |
6565 | (selected_p | |
6566 | ? make_number (-relief) | |
6567 | : make_number (relief))); | |
6568 | margin -= relief; | |
6569 | } | |
6570 | ||
6571 | /* Put a margin around the image. */ | |
6572 | if (margin) | |
6573 | plist = Fplist_put (plist, QCmargin, make_number (margin)); | |
6574 | ||
6575 | /* If button is not enabled, make the image appear disabled by | |
6576 | applying an appropriate algorithm to it. */ | |
6577 | if (!enabled_p) | |
6578 | plist = Fplist_put (plist, QCalgorithm, Qlaplace); | |
6579 | ||
6580 | /* Put a `display' text property on the string for the image to | |
6581 | display. Put a `menu-item' property on the string that gives | |
e037b9ec | 6582 | the start of this item's properties in the tool-bar items |
5f5c8ee5 GM |
6583 | vector. */ |
6584 | image = Fcons (Qimage, plist); | |
6585 | props = list4 (Qdisplay, image, | |
e037b9ec | 6586 | Qmenu_item, make_number (i * TOOL_BAR_ITEM_NSLOTS)), |
5f5c8ee5 GM |
6587 | Fadd_text_properties (make_number (string_idx), |
6588 | make_number (string_idx + 1), | |
e037b9ec | 6589 | props, f->desired_tool_bar_string); |
5f5c8ee5 | 6590 | #undef PROP |
a2889657 JB |
6591 | } |
6592 | ||
5f5c8ee5 GM |
6593 | UNGCPRO; |
6594 | } | |
6595 | ||
6596 | ||
e037b9ec | 6597 | /* Display one line of the tool-bar of frame IT->f. */ |
5f5c8ee5 GM |
6598 | |
6599 | static void | |
e037b9ec | 6600 | display_tool_bar_line (it) |
5f5c8ee5 GM |
6601 | struct it *it; |
6602 | { | |
6603 | struct glyph_row *row = it->glyph_row; | |
6604 | int max_x = it->last_visible_x; | |
6605 | struct glyph *last; | |
6606 | ||
6607 | prepare_desired_row (row); | |
6608 | row->y = it->current_y; | |
6609 | ||
6610 | while (it->current_x < max_x) | |
a2889657 | 6611 | { |
5f5c8ee5 | 6612 | int x_before, x, n_glyphs_before, i, nglyphs; |
a2f016e3 | 6613 | |
5f5c8ee5 GM |
6614 | /* Get the next display element. */ |
6615 | if (!get_next_display_element (it)) | |
6616 | break; | |
73af359d | 6617 | |
5f5c8ee5 GM |
6618 | /* Produce glyphs. */ |
6619 | x_before = it->current_x; | |
6620 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
6621 | PRODUCE_GLYPHS (it); | |
daa37602 | 6622 | |
5f5c8ee5 GM |
6623 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
6624 | i = 0; | |
6625 | x = x_before; | |
6626 | while (i < nglyphs) | |
6627 | { | |
6628 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; | |
6629 | ||
6630 | if (x + glyph->pixel_width > max_x) | |
6631 | { | |
6632 | /* Glyph doesn't fit on line. */ | |
6633 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
6634 | it->current_x = x; | |
6635 | goto out; | |
6636 | } | |
daa37602 | 6637 | |
5f5c8ee5 GM |
6638 | ++it->hpos; |
6639 | x += glyph->pixel_width; | |
6640 | ++i; | |
6641 | } | |
6642 | ||
6643 | /* Stop at line ends. */ | |
6644 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
6645 | break; | |
6646 | ||
6647 | set_iterator_to_next (it); | |
a2889657 | 6648 | } |
a2889657 | 6649 | |
5f5c8ee5 | 6650 | out:; |
a2889657 | 6651 | |
5f5c8ee5 GM |
6652 | row->displays_text_p = row->used[TEXT_AREA] != 0; |
6653 | extend_face_to_end_of_line (it); | |
6654 | last = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA] - 1; | |
6655 | last->right_box_line_p = 1; | |
6656 | compute_line_metrics (it); | |
6657 | ||
e037b9ec | 6658 | /* If line is empty, make it occupy the rest of the tool-bar. */ |
5f5c8ee5 GM |
6659 | if (!row->displays_text_p) |
6660 | { | |
312246d1 GM |
6661 | row->height = row->phys_height = it->last_visible_y - row->y; |
6662 | row->ascent = row->phys_ascent = 0; | |
5f5c8ee5 GM |
6663 | } |
6664 | ||
6665 | row->full_width_p = 1; | |
6666 | row->continued_p = 0; | |
6667 | row->truncated_on_left_p = 0; | |
6668 | row->truncated_on_right_p = 0; | |
6669 | ||
6670 | it->current_x = it->hpos = 0; | |
6671 | it->current_y += row->height; | |
6672 | ++it->vpos; | |
6673 | ++it->glyph_row; | |
a2889657 | 6674 | } |
96a410bc | 6675 | |
5f5c8ee5 | 6676 | |
e037b9ec | 6677 | /* Value is the number of screen lines needed to make all tool-bar |
5f5c8ee5 | 6678 | items of frame F visible. */ |
96a410bc | 6679 | |
d39b6696 | 6680 | static int |
e037b9ec | 6681 | tool_bar_lines_needed (f) |
5f5c8ee5 | 6682 | struct frame *f; |
d39b6696 | 6683 | { |
e037b9ec | 6684 | struct window *w = XWINDOW (f->tool_bar_window); |
5f5c8ee5 GM |
6685 | struct it it; |
6686 | ||
e037b9ec GM |
6687 | /* Initialize an iterator for iteration over |
6688 | F->desired_tool_bar_string in the tool-bar window of frame F. */ | |
6689 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
6690 | it.first_visible_x = 0; |
6691 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
e037b9ec | 6692 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); |
5f5c8ee5 GM |
6693 | |
6694 | while (!ITERATOR_AT_END_P (&it)) | |
6695 | { | |
6696 | it.glyph_row = w->desired_matrix->rows; | |
6697 | clear_glyph_row (it.glyph_row); | |
e037b9ec | 6698 | display_tool_bar_line (&it); |
5f5c8ee5 GM |
6699 | } |
6700 | ||
6701 | return (it.current_y + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f); | |
d39b6696 | 6702 | } |
96a410bc | 6703 | |
5f5c8ee5 | 6704 | |
e037b9ec | 6705 | /* Display the tool-bar of frame F. Value is non-zero if tool-bar's |
5f5c8ee5 GM |
6706 | height should be changed. */ |
6707 | ||
6708 | static int | |
e037b9ec | 6709 | redisplay_tool_bar (f) |
5f5c8ee5 | 6710 | struct frame *f; |
96a410bc | 6711 | { |
5f5c8ee5 GM |
6712 | struct window *w; |
6713 | struct it it; | |
6714 | struct glyph_row *row; | |
6715 | int change_height_p = 0; | |
6716 | ||
e037b9ec GM |
6717 | /* If frame hasn't a tool-bar window or if it is zero-height, don't |
6718 | do anything. This means you must start with tool-bar-lines | |
5f5c8ee5 | 6719 | non-zero to get the auto-sizing effect. Or in other words, you |
e037b9ec GM |
6720 | can turn off tool-bars by specifying tool-bar-lines zero. */ |
6721 | if (!WINDOWP (f->tool_bar_window) | |
6722 | || (w = XWINDOW (f->tool_bar_window), | |
5f5c8ee5 GM |
6723 | XFASTINT (w->height) == 0)) |
6724 | return 0; | |
96a410bc | 6725 | |
e037b9ec GM |
6726 | /* Set up an iterator for the tool-bar window. */ |
6727 | init_iterator (&it, w, -1, -1, w->desired_matrix->rows, TOOL_BAR_FACE_ID); | |
5f5c8ee5 GM |
6728 | it.first_visible_x = 0; |
6729 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
6730 | row = it.glyph_row; | |
3450d04c | 6731 | |
e037b9ec GM |
6732 | /* Build a string that represents the contents of the tool-bar. */ |
6733 | build_desired_tool_bar_string (f); | |
6734 | reseat_to_string (&it, NULL, f->desired_tool_bar_string, 0, 0, 0, -1); | |
3450d04c | 6735 | |
e037b9ec | 6736 | /* Display as many lines as needed to display all tool-bar items. */ |
5f5c8ee5 | 6737 | while (it.current_y < it.last_visible_y) |
e037b9ec | 6738 | display_tool_bar_line (&it); |
3450d04c | 6739 | |
e037b9ec | 6740 | /* It doesn't make much sense to try scrolling in the tool-bar |
5f5c8ee5 GM |
6741 | window, so don't do it. */ |
6742 | w->desired_matrix->no_scrolling_p = 1; | |
6743 | w->must_be_updated_p = 1; | |
3450d04c | 6744 | |
e037b9ec | 6745 | if (auto_resize_tool_bars_p) |
5f5c8ee5 GM |
6746 | { |
6747 | int nlines; | |
6748 | ||
6749 | /* If there are blank lines at the end, except for a partially | |
6750 | visible blank line at the end that is smaller than | |
e037b9ec | 6751 | CANON_Y_UNIT, change the tool-bar's height. */ |
5f5c8ee5 GM |
6752 | row = it.glyph_row - 1; |
6753 | if (!row->displays_text_p | |
6754 | && row->height >= CANON_Y_UNIT (f)) | |
6755 | change_height_p = 1; | |
6756 | ||
e037b9ec GM |
6757 | /* If row displays tool-bar items, but is partially visible, |
6758 | change the tool-bar's height. */ | |
5f5c8ee5 GM |
6759 | if (row->displays_text_p |
6760 | && MATRIX_ROW_BOTTOM_Y (row) > it.last_visible_y) | |
6761 | change_height_p = 1; | |
6762 | ||
e037b9ec | 6763 | /* Resize windows as needed by changing the `tool-bar-lines' |
5f5c8ee5 GM |
6764 | frame parameter. */ |
6765 | if (change_height_p | |
e037b9ec | 6766 | && (nlines = tool_bar_lines_needed (f), |
5f5c8ee5 GM |
6767 | nlines != XFASTINT (w->height))) |
6768 | { | |
e037b9ec | 6769 | extern Lisp_Object Qtool_bar_lines; |
5f5c8ee5 GM |
6770 | Lisp_Object frame; |
6771 | ||
6772 | XSETFRAME (frame, f); | |
6773 | clear_glyph_matrix (w->desired_matrix); | |
6774 | Fmodify_frame_parameters (frame, | |
e037b9ec | 6775 | Fcons (Fcons (Qtool_bar_lines, |
5f5c8ee5 GM |
6776 | make_number (nlines)), |
6777 | Qnil)); | |
6778 | fonts_changed_p = 1; | |
6779 | } | |
6780 | } | |
3450d04c | 6781 | |
5f5c8ee5 | 6782 | return change_height_p; |
96a410bc | 6783 | } |
90adcf20 | 6784 | |
5f5c8ee5 | 6785 | |
e037b9ec GM |
6786 | /* Get information about the tool-bar item which is displayed in GLYPH |
6787 | on frame F. Return in *PROP_IDX the index where tool-bar item | |
6788 | properties start in F->current_tool_bar_items. Value is zero if | |
6789 | GLYPH doesn't display a tool-bar item. */ | |
5f5c8ee5 GM |
6790 | |
6791 | int | |
e037b9ec | 6792 | tool_bar_item_info (f, glyph, prop_idx) |
5f5c8ee5 GM |
6793 | struct frame *f; |
6794 | struct glyph *glyph; | |
6795 | int *prop_idx; | |
90adcf20 | 6796 | { |
5f5c8ee5 GM |
6797 | Lisp_Object prop; |
6798 | int success_p; | |
6799 | ||
6800 | /* Get the text property `menu-item' at pos. The value of that | |
6801 | property is the start index of this item's properties in | |
e037b9ec | 6802 | F->current_tool_bar_items. */ |
5f5c8ee5 | 6803 | prop = Fget_text_property (make_number (glyph->charpos), |
e037b9ec | 6804 | Qmenu_item, f->current_tool_bar_string); |
5f5c8ee5 GM |
6805 | if (INTEGERP (prop)) |
6806 | { | |
6807 | *prop_idx = XINT (prop); | |
6808 | success_p = 1; | |
6809 | } | |
6810 | else | |
6811 | success_p = 0; | |
90adcf20 | 6812 | |
5f5c8ee5 GM |
6813 | return success_p; |
6814 | } | |
6815 | ||
6816 | #endif /* HAVE_WINDOW_SYSTEM */ | |
90adcf20 | 6817 | |
feb0c42f | 6818 | |
5f5c8ee5 GM |
6819 | \f |
6820 | /************************************************************************ | |
6821 | Horizontal scrolling | |
6822 | ************************************************************************/ | |
feb0c42f | 6823 | |
5f5c8ee5 GM |
6824 | static int hscroll_window_tree P_ ((Lisp_Object)); |
6825 | static int hscroll_windows P_ ((Lisp_Object)); | |
feb0c42f | 6826 | |
5f5c8ee5 GM |
6827 | /* For all leaf windows in the window tree rooted at WINDOW, set their |
6828 | hscroll value so that PT is (i) visible in the window, and (ii) so | |
6829 | that it is not within a certain margin at the window's left and | |
6830 | right border. Value is non-zero if any window's hscroll has been | |
6831 | changed. */ | |
6832 | ||
6833 | static int | |
6834 | hscroll_window_tree (window) | |
6835 | Lisp_Object window; | |
6836 | { | |
6837 | int hscrolled_p = 0; | |
6838 | ||
6839 | while (WINDOWP (window)) | |
90adcf20 | 6840 | { |
5f5c8ee5 GM |
6841 | struct window *w = XWINDOW (window); |
6842 | ||
6843 | if (WINDOWP (w->hchild)) | |
6844 | hscrolled_p |= hscroll_window_tree (w->hchild); | |
6845 | else if (WINDOWP (w->vchild)) | |
6846 | hscrolled_p |= hscroll_window_tree (w->vchild); | |
6847 | else if (w->cursor.vpos >= 0) | |
6848 | { | |
6849 | int hscroll_margin, text_area_x, text_area_y; | |
6850 | int text_area_width, text_area_height; | |
92a90e89 GM |
6851 | struct glyph_row *current_cursor_row |
6852 | = MATRIX_ROW (w->current_matrix, w->cursor.vpos); | |
6853 | struct glyph_row *desired_cursor_row | |
6854 | = MATRIX_ROW (w->desired_matrix, w->cursor.vpos); | |
6855 | struct glyph_row *cursor_row | |
6856 | = (desired_cursor_row->enabled_p | |
6857 | ? desired_cursor_row | |
6858 | : current_cursor_row); | |
a2725ab2 | 6859 | |
5f5c8ee5 GM |
6860 | window_box (w, TEXT_AREA, &text_area_x, &text_area_y, |
6861 | &text_area_width, &text_area_height); | |
90adcf20 | 6862 | |
5f5c8ee5 GM |
6863 | /* Scroll when cursor is inside this scroll margin. */ |
6864 | hscroll_margin = 5 * CANON_X_UNIT (XFRAME (w->frame)); | |
6865 | ||
6866 | if ((XFASTINT (w->hscroll) | |
6867 | && w->cursor.x < hscroll_margin) | |
92a90e89 GM |
6868 | || (cursor_row->enabled_p |
6869 | && cursor_row->truncated_on_right_p | |
5f5c8ee5 | 6870 | && (w->cursor.x > text_area_width - hscroll_margin))) |
08b610e4 | 6871 | { |
5f5c8ee5 GM |
6872 | struct it it; |
6873 | int hscroll; | |
6874 | struct buffer *saved_current_buffer; | |
6875 | int pt; | |
6876 | ||
6877 | /* Find point in a display of infinite width. */ | |
6878 | saved_current_buffer = current_buffer; | |
6879 | current_buffer = XBUFFER (w->buffer); | |
6880 | ||
6881 | if (w == XWINDOW (selected_window)) | |
6882 | pt = BUF_PT (current_buffer); | |
6883 | else | |
08b610e4 | 6884 | { |
5f5c8ee5 GM |
6885 | pt = marker_position (w->pointm); |
6886 | pt = max (BEGV, pt); | |
6887 | pt = min (ZV, pt); | |
6888 | } | |
6889 | ||
6890 | /* Move iterator to pt starting at cursor_row->start in | |
6891 | a line with infinite width. */ | |
6892 | init_to_row_start (&it, w, cursor_row); | |
6893 | it.last_visible_x = INFINITY; | |
6894 | move_it_in_display_line_to (&it, pt, -1, MOVE_TO_POS); | |
6895 | current_buffer = saved_current_buffer; | |
6896 | ||
6897 | /* Center cursor in window. */ | |
6898 | hscroll = (max (0, it.current_x - text_area_width / 2) | |
6899 | / CANON_X_UNIT (it.f)); | |
6900 | ||
6901 | /* Don't call Fset_window_hscroll if value hasn't | |
6902 | changed because it will prevent redisplay | |
6903 | optimizations. */ | |
6904 | if (XFASTINT (w->hscroll) != hscroll) | |
6905 | { | |
6906 | Fset_window_hscroll (window, make_number (hscroll)); | |
6907 | hscrolled_p = 1; | |
08b610e4 | 6908 | } |
08b610e4 | 6909 | } |
08b610e4 | 6910 | } |
a2725ab2 | 6911 | |
5f5c8ee5 | 6912 | window = w->next; |
90adcf20 | 6913 | } |
cd6dfed6 | 6914 | |
5f5c8ee5 GM |
6915 | /* Value is non-zero if hscroll of any leaf window has been changed. */ |
6916 | return hscrolled_p; | |
6917 | } | |
6918 | ||
6919 | ||
6920 | /* Set hscroll so that cursor is visible and not inside horizontal | |
6921 | scroll margins for all windows in the tree rooted at WINDOW. See | |
6922 | also hscroll_window_tree above. Value is non-zero if any window's | |
6923 | hscroll has been changed. If it has, desired matrices on the frame | |
6924 | of WINDOW are cleared. */ | |
6925 | ||
6926 | static int | |
6927 | hscroll_windows (window) | |
6928 | Lisp_Object window; | |
6929 | { | |
6930 | int hscrolled_p = hscroll_window_tree (window); | |
6931 | if (hscrolled_p) | |
6932 | clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window)))); | |
6933 | return hscrolled_p; | |
90adcf20 | 6934 | } |
5f5c8ee5 GM |
6935 | |
6936 | ||
90adcf20 | 6937 | \f |
5f5c8ee5 GM |
6938 | /************************************************************************ |
6939 | Redisplay | |
6940 | ************************************************************************/ | |
6941 | ||
6942 | /* Variables holding some state of redisplay if GLYPH_DEBUG is defined | |
6943 | to a non-zero value. This is sometimes handy to have in a debugger | |
6944 | session. */ | |
6945 | ||
6946 | #if GLYPH_DEBUG | |
a2889657 | 6947 | |
5f5c8ee5 GM |
6948 | /* First and last unchanged row for try_window_id. */ |
6949 | ||
6950 | int debug_first_unchanged_at_end_vpos; | |
6951 | int debug_last_unchanged_at_beg_vpos; | |
6952 | ||
6953 | /* Delta vpos and y. */ | |
6954 | ||
6955 | int debug_dvpos, debug_dy; | |
6956 | ||
6957 | /* Delta in characters and bytes for try_window_id. */ | |
6958 | ||
6959 | int debug_delta, debug_delta_bytes; | |
6960 | ||
6961 | /* Values of window_end_pos and window_end_vpos at the end of | |
6962 | try_window_id. */ | |
6963 | ||
6964 | int debug_end_pos, debug_end_vpos; | |
6965 | ||
6966 | /* Append a string to W->desired_matrix->method. FMT is a printf | |
6967 | format string. A1...A9 are a supplement for a variable-length | |
6968 | argument list. If trace_redisplay_p is non-zero also printf the | |
6969 | resulting string to stderr. */ | |
6970 | ||
6971 | static void | |
6972 | debug_method_add (w, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
6973 | struct window *w; | |
6974 | char *fmt; | |
6975 | int a1, a2, a3, a4, a5, a6, a7, a8, a9; | |
6976 | { | |
6977 | char buffer[512]; | |
6978 | char *method = w->desired_matrix->method; | |
6979 | int len = strlen (method); | |
6980 | int size = sizeof w->desired_matrix->method; | |
6981 | int remaining = size - len - 1; | |
6982 | ||
6983 | sprintf (buffer, fmt, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
6984 | if (len && remaining) | |
6985 | { | |
6986 | method[len] = '|'; | |
6987 | --remaining, ++len; | |
6988 | } | |
6989 | ||
6990 | strncpy (method + len, buffer, remaining); | |
6991 | ||
6992 | if (trace_redisplay_p) | |
6993 | fprintf (stderr, "%p (%s): %s\n", | |
6994 | w, | |
6995 | ((BUFFERP (w->buffer) | |
6996 | && STRINGP (XBUFFER (w->buffer)->name)) | |
6997 | ? (char *) XSTRING (XBUFFER (w->buffer)->name)->data | |
6998 | : "no buffer"), | |
6999 | buffer); | |
7000 | } | |
a2889657 | 7001 | |
5f5c8ee5 | 7002 | #endif /* GLYPH_DEBUG */ |
90adcf20 | 7003 | |
a2889657 | 7004 | |
5f5c8ee5 GM |
7005 | /* This counter is used to clear the face cache every once in a while |
7006 | in redisplay_internal. It is incremented for each redisplay. | |
7007 | Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is | |
7008 | cleared. */ | |
0d231165 | 7009 | |
5f5c8ee5 | 7010 | #define CLEAR_FACE_CACHE_COUNT 10000 |
463f6b91 RS |
7011 | static int clear_face_cache_count; |
7012 | ||
20de20dc | 7013 | /* Record the previous terminal frame we displayed. */ |
5f5c8ee5 GM |
7014 | |
7015 | static struct frame *previous_terminal_frame; | |
7016 | ||
7017 | /* Non-zero while redisplay_internal is in progress. */ | |
7018 | ||
7019 | int redisplaying_p; | |
7020 | ||
7021 | ||
7022 | /* Value is non-zero if all changes in window W, which displays | |
7023 | current_buffer, are in the text between START and END. START is a | |
7024 | buffer position, END is given as a distance from Z. Used in | |
7025 | redisplay_internal for display optimization. */ | |
7026 | ||
7027 | static INLINE int | |
7028 | text_outside_line_unchanged_p (w, start, end) | |
7029 | struct window *w; | |
7030 | int start, end; | |
7031 | { | |
7032 | int unchanged_p = 1; | |
7033 | ||
7034 | /* If text or overlays have changed, see where. */ | |
7035 | if (XFASTINT (w->last_modified) < MODIFF | |
7036 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
7037 | { | |
7038 | /* Gap in the line? */ | |
7039 | if (GPT < start || Z - GPT < end) | |
7040 | unchanged_p = 0; | |
7041 | ||
7042 | /* Changes start in front of the line, or end after it? */ | |
7043 | if (unchanged_p | |
9142dd5b GM |
7044 | && (BEG_UNCHANGED < start - 1 |
7045 | || END_UNCHANGED < end)) | |
5f5c8ee5 GM |
7046 | unchanged_p = 0; |
7047 | ||
7048 | /* If selective display, can't optimize if changes start at the | |
7049 | beginning of the line. */ | |
7050 | if (unchanged_p | |
7051 | && INTEGERP (current_buffer->selective_display) | |
7052 | && XINT (current_buffer->selective_display) > 0 | |
9142dd5b | 7053 | && (BEG_UNCHANGED < start || GPT <= start)) |
5f5c8ee5 GM |
7054 | unchanged_p = 0; |
7055 | } | |
7056 | ||
7057 | return unchanged_p; | |
7058 | } | |
7059 | ||
7060 | ||
7061 | /* Do a frame update, taking possible shortcuts into account. This is | |
7062 | the main external entry point for redisplay. | |
7063 | ||
7064 | If the last redisplay displayed an echo area message and that message | |
7065 | is no longer requested, we clear the echo area or bring back the | |
7066 | mini-buffer if that is in use. */ | |
20de20dc | 7067 | |
a2889657 JB |
7068 | void |
7069 | redisplay () | |
e9874cee RS |
7070 | { |
7071 | redisplay_internal (0); | |
7072 | } | |
7073 | ||
260a86a0 KH |
7074 | /* Return 1 if point moved out of or into a composition. Otherwise |
7075 | return 0. PREV_BUF and PREV_PT are the last point buffer and | |
7076 | position. BUF and PT are the current point buffer and position. */ | |
7077 | ||
7078 | int | |
7079 | check_point_in_composition (prev_buf, prev_pt, buf, pt) | |
7080 | struct buffer *prev_buf, *buf; | |
7081 | int prev_pt, pt; | |
7082 | { | |
7083 | int start, end; | |
7084 | Lisp_Object prop; | |
7085 | Lisp_Object buffer; | |
7086 | ||
7087 | XSETBUFFER (buffer, buf); | |
7088 | /* Check a composition at the last point if point moved within the | |
7089 | same buffer. */ | |
7090 | if (prev_buf == buf) | |
7091 | { | |
7092 | if (prev_pt == pt) | |
7093 | /* Point didn't move. */ | |
7094 | return 0; | |
7095 | ||
7096 | if (prev_pt > BUF_BEGV (buf) && prev_pt < BUF_ZV (buf) | |
7097 | && find_composition (prev_pt, -1, &start, &end, &prop, buffer) | |
7098 | && COMPOSITION_VALID_P (start, end, prop) | |
7099 | && start < prev_pt && end > prev_pt) | |
7100 | /* The last point was within the composition. Return 1 iff | |
7101 | point moved out of the composition. */ | |
7102 | return (pt <= start || pt >= end); | |
7103 | } | |
7104 | ||
7105 | /* Check a composition at the current point. */ | |
7106 | return (pt > BUF_BEGV (buf) && pt < BUF_ZV (buf) | |
7107 | && find_composition (pt, -1, &start, &end, &prop, buffer) | |
7108 | && COMPOSITION_VALID_P (start, end, prop) | |
7109 | && start < pt && end > pt); | |
7110 | } | |
5f5c8ee5 | 7111 | |
9142dd5b GM |
7112 | /* Reconsider the setting of B->clip_changed which is displayed |
7113 | in window W. */ | |
7114 | ||
7115 | static INLINE void | |
7116 | reconsider_clip_changes (w, b) | |
7117 | struct window *w; | |
7118 | struct buffer *b; | |
7119 | { | |
7120 | if (b->prevent_redisplay_optimizations_p) | |
7121 | b->clip_changed = 1; | |
7122 | else if (b->clip_changed | |
7123 | && !NILP (w->window_end_valid) | |
7124 | && w->current_matrix->buffer == b | |
7125 | && w->current_matrix->zv == BUF_ZV (b) | |
7126 | && w->current_matrix->begv == BUF_BEGV (b)) | |
7127 | b->clip_changed = 0; | |
260a86a0 KH |
7128 | |
7129 | /* If display wasn't paused, and W is not a tool bar window, see if | |
7130 | point has been moved into or out of a composition. In that case, | |
7131 | we set b->clip_changed to 1 to force updating the screen. If | |
7132 | b->clip_changed has already been set to 1, we can skip this | |
7133 | check. */ | |
7134 | if (!b->clip_changed | |
7135 | && BUFFERP (w->buffer) && !NILP (w->window_end_valid)) | |
7136 | { | |
7137 | int pt; | |
7138 | ||
7139 | if (w == XWINDOW (selected_window)) | |
7140 | pt = BUF_PT (current_buffer); | |
7141 | else | |
7142 | pt = marker_position (w->pointm); | |
7143 | ||
7144 | if ((w->current_matrix->buffer != XBUFFER (w->buffer) | |
7145 | || pt != w->last_point) | |
7146 | && check_point_in_composition (w->current_matrix->buffer, | |
7147 | w->last_point, | |
7148 | XBUFFER (w->buffer), pt)) | |
7149 | b->clip_changed = 1; | |
7150 | } | |
9142dd5b GM |
7151 | } |
7152 | ||
7153 | ||
5f5c8ee5 GM |
7154 | /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in |
7155 | response to any user action; therefore, we should preserve the echo | |
7156 | area. (Actually, our caller does that job.) Perhaps in the future | |
7157 | avoid recentering windows if it is not necessary; currently that | |
7158 | causes some problems. */ | |
e9874cee RS |
7159 | |
7160 | static void | |
7161 | redisplay_internal (preserve_echo_area) | |
7162 | int preserve_echo_area; | |
a2889657 | 7163 | { |
5f5c8ee5 GM |
7164 | struct window *w = XWINDOW (selected_window); |
7165 | struct frame *f = XFRAME (w->frame); | |
7166 | int pause; | |
a2889657 | 7167 | int must_finish = 0; |
5f5c8ee5 | 7168 | struct text_pos tlbufpos, tlendpos; |
89819bdd | 7169 | int number_of_visible_frames; |
28514cd9 | 7170 | int count; |
886bd6f2 | 7171 | struct frame *sf = SELECTED_FRAME (); |
a2889657 | 7172 | |
5f5c8ee5 GM |
7173 | /* Non-zero means redisplay has to consider all windows on all |
7174 | frames. Zero means, only selected_window is considered. */ | |
7175 | int consider_all_windows_p; | |
7176 | ||
7177 | TRACE ((stderr, "redisplay_internal %d\n", redisplaying_p)); | |
7178 | ||
7179 | /* No redisplay if running in batch mode or frame is not yet fully | |
7180 | initialized, or redisplay is explicitly turned off by setting | |
7181 | Vinhibit_redisplay. */ | |
7182 | if (noninteractive | |
7183 | || !NILP (Vinhibit_redisplay) | |
7184 | || !f->glyphs_initialized_p) | |
a2889657 JB |
7185 | return; |
7186 | ||
5f5c8ee5 GM |
7187 | /* The flag redisplay_performed_directly_p is set by |
7188 | direct_output_for_insert when it already did the whole screen | |
7189 | update necessary. */ | |
7190 | if (redisplay_performed_directly_p) | |
7191 | { | |
7192 | redisplay_performed_directly_p = 0; | |
7193 | if (!hscroll_windows (selected_window)) | |
7194 | return; | |
7195 | } | |
7196 | ||
15f0cf78 RS |
7197 | #ifdef USE_X_TOOLKIT |
7198 | if (popup_activated ()) | |
7199 | return; | |
7200 | #endif | |
7201 | ||
28514cd9 | 7202 | /* I don't think this happens but let's be paranoid. */ |
5f5c8ee5 | 7203 | if (redisplaying_p) |
735c094c KH |
7204 | return; |
7205 | ||
28514cd9 GM |
7206 | /* Record a function that resets redisplaying_p to its old value |
7207 | when we leave this function. */ | |
7208 | count = specpdl_ptr - specpdl; | |
7209 | record_unwind_protect (unwind_redisplay, make_number (redisplaying_p)); | |
7210 | ++redisplaying_p; | |
7211 | ||
8b32d885 RS |
7212 | retry: |
7213 | ||
9142dd5b GM |
7214 | reconsider_clip_changes (w, current_buffer); |
7215 | ||
5f5c8ee5 GM |
7216 | /* If new fonts have been loaded that make a glyph matrix adjustment |
7217 | necessary, do it. */ | |
7218 | if (fonts_changed_p) | |
7219 | { | |
7220 | adjust_glyphs (NULL); | |
7221 | ++windows_or_buffers_changed; | |
7222 | fonts_changed_p = 0; | |
7223 | } | |
7224 | ||
886bd6f2 GM |
7225 | if (! FRAME_WINDOW_P (sf) |
7226 | && previous_terminal_frame != sf) | |
20de20dc | 7227 | { |
5f5c8ee5 GM |
7228 | /* Since frames on an ASCII terminal share the same display |
7229 | area, displaying a different frame means redisplay the whole | |
7230 | thing. */ | |
20de20dc | 7231 | windows_or_buffers_changed++; |
886bd6f2 GM |
7232 | SET_FRAME_GARBAGED (sf); |
7233 | XSETFRAME (Vterminal_frame, sf); | |
20de20dc | 7234 | } |
886bd6f2 | 7235 | previous_terminal_frame = sf; |
20de20dc | 7236 | |
5f5c8ee5 GM |
7237 | /* Set the visible flags for all frames. Do this before checking |
7238 | for resized or garbaged frames; they want to know if their frames | |
7239 | are visible. See the comment in frame.h for | |
7240 | FRAME_SAMPLE_VISIBILITY. */ | |
d724d989 | 7241 | { |
35f56f96 | 7242 | Lisp_Object tail, frame; |
d724d989 | 7243 | |
89819bdd RS |
7244 | number_of_visible_frames = 0; |
7245 | ||
35f56f96 | 7246 | FOR_EACH_FRAME (tail, frame) |
f82aff7c | 7247 | { |
5f5c8ee5 GM |
7248 | struct frame *f = XFRAME (frame); |
7249 | ||
7250 | FRAME_SAMPLE_VISIBILITY (f); | |
7251 | if (FRAME_VISIBLE_P (f)) | |
7252 | ++number_of_visible_frames; | |
7253 | clear_desired_matrices (f); | |
f82aff7c | 7254 | } |
d724d989 JB |
7255 | } |
7256 | ||
44fa5b1e | 7257 | /* Notice any pending interrupt request to change frame size. */ |
c6e89d6c | 7258 | do_pending_window_change (1); |
a2889657 | 7259 | |
5f5c8ee5 | 7260 | /* Clear frames marked as garbaged. */ |
44fa5b1e | 7261 | if (frame_garbaged) |
c6e89d6c | 7262 | clear_garbaged_frames (); |
a2889657 | 7263 | |
e037b9ec | 7264 | /* Build menubar and tool-bar items. */ |
f82aff7c RS |
7265 | prepare_menu_bars (); |
7266 | ||
28995e67 | 7267 | if (windows_or_buffers_changed) |
a2889657 JB |
7268 | update_mode_lines++; |
7269 | ||
538f13d4 RS |
7270 | /* Detect case that we need to write or remove a star in the mode line. */ |
7271 | if ((SAVE_MODIFF < MODIFF) != !NILP (w->last_had_star)) | |
a2889657 JB |
7272 | { |
7273 | w->update_mode_line = Qt; | |
7274 | if (buffer_shared > 1) | |
7275 | update_mode_lines++; | |
7276 | } | |
7277 | ||
5f5c8ee5 | 7278 | /* If %c is in the mode line, update it if needed. */ |
28995e67 RS |
7279 | if (!NILP (w->column_number_displayed) |
7280 | /* This alternative quickly identifies a common case | |
7281 | where no change is needed. */ | |
7282 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
7283 | && XFASTINT (w->last_modified) >= MODIFF |
7284 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
7285 | && XFASTINT (w->column_number_displayed) != current_column ()) |
7286 | w->update_mode_line = Qt; | |
7287 | ||
44fa5b1e | 7288 | FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w->frame)) = -1; |
a2889657 | 7289 | |
5f5c8ee5 GM |
7290 | /* The variable buffer_shared is set in redisplay_window and |
7291 | indicates that we redisplay a buffer in different windows. See | |
7292 | there. */ | |
7293 | consider_all_windows_p = update_mode_lines || buffer_shared > 1; | |
a2889657 JB |
7294 | |
7295 | /* If specs for an arrow have changed, do thorough redisplay | |
7296 | to ensure we remove any arrow that should no longer exist. */ | |
d45de95b | 7297 | if (! EQ (COERCE_MARKER (Voverlay_arrow_position), last_arrow_position) |
ded34426 | 7298 | || ! EQ (Voverlay_arrow_string, last_arrow_string)) |
5f5c8ee5 | 7299 | consider_all_windows_p = windows_or_buffers_changed = 1; |
a2889657 | 7300 | |
90adcf20 RS |
7301 | /* Normally the message* functions will have already displayed and |
7302 | updated the echo area, but the frame may have been trashed, or | |
7303 | the update may have been preempted, so display the echo area | |
c6e89d6c GM |
7304 | again here. Checking both message buffers captures the case that |
7305 | the echo area should be cleared. */ | |
7306 | if (!NILP (echo_area_buffer[0]) || !NILP (echo_area_buffer[1])) | |
90adcf20 | 7307 | { |
c6e89d6c | 7308 | int window_height_changed_p = echo_area_display (0); |
90adcf20 | 7309 | must_finish = 1; |
dd2eb166 | 7310 | |
c6e89d6c GM |
7311 | if (fonts_changed_p) |
7312 | goto retry; | |
7313 | else if (window_height_changed_p) | |
7314 | { | |
7315 | consider_all_windows_p = 1; | |
7316 | ++update_mode_lines; | |
7317 | ++windows_or_buffers_changed; | |
9142dd5b GM |
7318 | |
7319 | /* If window configuration was changed, frames may have been | |
7320 | marked garbaged. Clear them or we will experience | |
7321 | surprises wrt scrolling. */ | |
7322 | if (frame_garbaged) | |
7323 | clear_garbaged_frames (); | |
c6e89d6c | 7324 | } |
90adcf20 | 7325 | } |
dd2eb166 GM |
7326 | else if (w == XWINDOW (minibuf_window) |
7327 | && (current_buffer->clip_changed | |
7328 | || XFASTINT (w->last_modified) < MODIFF | |
7329 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF) | |
92a90e89 | 7330 | && resize_mini_window (w, 0)) |
c6e89d6c GM |
7331 | { |
7332 | /* Resized active mini-window to fit the size of what it is | |
dd2eb166 GM |
7333 | showing if its contents might have changed. */ |
7334 | must_finish = 1; | |
7335 | consider_all_windows_p = 1; | |
c6e89d6c | 7336 | ++windows_or_buffers_changed; |
dd2eb166 | 7337 | ++update_mode_lines; |
9142dd5b GM |
7338 | |
7339 | /* If window configuration was changed, frames may have been | |
7340 | marked garbaged. Clear them or we will experience | |
7341 | surprises wrt scrolling. */ | |
7342 | if (frame_garbaged) | |
7343 | clear_garbaged_frames (); | |
c6e89d6c GM |
7344 | } |
7345 | ||
90adcf20 | 7346 | |
5f5c8ee5 GM |
7347 | /* If showing the region, and mark has changed, we must redisplay |
7348 | the whole window. The assignment to this_line_start_pos prevents | |
7349 | the optimization directly below this if-statement. */ | |
bd66d1ba RS |
7350 | if (((!NILP (Vtransient_mark_mode) |
7351 | && !NILP (XBUFFER (w->buffer)->mark_active)) | |
7352 | != !NILP (w->region_showing)) | |
82d04750 JB |
7353 | || (!NILP (w->region_showing) |
7354 | && !EQ (w->region_showing, | |
7355 | Fmarker_position (XBUFFER (w->buffer)->mark)))) | |
5f5c8ee5 GM |
7356 | CHARPOS (this_line_start_pos) = 0; |
7357 | ||
7358 | /* Optimize the case that only the line containing the cursor in the | |
7359 | selected window has changed. Variables starting with this_ are | |
7360 | set in display_line and record information about the line | |
7361 | containing the cursor. */ | |
7362 | tlbufpos = this_line_start_pos; | |
7363 | tlendpos = this_line_end_pos; | |
7364 | if (!consider_all_windows_p | |
7365 | && CHARPOS (tlbufpos) > 0 | |
7366 | && NILP (w->update_mode_line) | |
73af359d | 7367 | && !current_buffer->clip_changed |
44fa5b1e | 7368 | && FRAME_VISIBLE_P (XFRAME (w->frame)) |
f21ef775 | 7369 | && !FRAME_OBSCURED_P (XFRAME (w->frame)) |
5f5c8ee5 | 7370 | /* Make sure recorded data applies to current buffer, etc. */ |
a2889657 JB |
7371 | && this_line_buffer == current_buffer |
7372 | && current_buffer == XBUFFER (w->buffer) | |
265a9e55 | 7373 | && NILP (w->force_start) |
5f5c8ee5 GM |
7374 | /* Point must be on the line that we have info recorded about. */ |
7375 | && PT >= CHARPOS (tlbufpos) | |
7376 | && PT <= Z - CHARPOS (tlendpos) | |
a2889657 JB |
7377 | /* All text outside that line, including its final newline, |
7378 | must be unchanged */ | |
5f5c8ee5 GM |
7379 | && text_outside_line_unchanged_p (w, CHARPOS (tlbufpos), |
7380 | CHARPOS (tlendpos))) | |
7381 | { | |
7382 | if (CHARPOS (tlbufpos) > BEGV | |
7383 | && FETCH_BYTE (BYTEPOS (tlbufpos) - 1) != '\n' | |
7384 | && (CHARPOS (tlbufpos) == ZV | |
7385 | || FETCH_BYTE (BYTEPOS (tlbufpos)) == '\n')) | |
a2889657 JB |
7386 | /* Former continuation line has disappeared by becoming empty */ |
7387 | goto cancel; | |
7388 | else if (XFASTINT (w->last_modified) < MODIFF | |
8850a573 | 7389 | || XFASTINT (w->last_overlay_modified) < OVERLAY_MODIFF |
a2889657 JB |
7390 | || MINI_WINDOW_P (w)) |
7391 | { | |
1c9241f5 KH |
7392 | /* We have to handle the case of continuation around a |
7393 | wide-column character (See the comment in indent.c around | |
7394 | line 885). | |
7395 | ||
7396 | For instance, in the following case: | |
7397 | ||
7398 | -------- Insert -------- | |
7399 | K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars. | |
7400 | J_I_ ==> J_I_ `^^' are cursors. | |
7401 | ^^ ^^ | |
7402 | -------- -------- | |
7403 | ||
7404 | As we have to redraw the line above, we should goto cancel. */ | |
7405 | ||
5f5c8ee5 GM |
7406 | struct it it; |
7407 | int line_height_before = this_line_pixel_height; | |
7408 | ||
7409 | /* Note that start_display will handle the case that the | |
7410 | line starting at tlbufpos is a continuation lines. */ | |
7411 | start_display (&it, w, tlbufpos); | |
7412 | ||
7413 | /* Implementation note: It this still necessary? */ | |
7414 | if (it.current_x != this_line_start_x) | |
1c9241f5 KH |
7415 | goto cancel; |
7416 | ||
5f5c8ee5 GM |
7417 | TRACE ((stderr, "trying display optimization 1\n")); |
7418 | w->cursor.vpos = -1; | |
a2889657 | 7419 | overlay_arrow_seen = 0; |
5f5c8ee5 GM |
7420 | it.vpos = this_line_vpos; |
7421 | it.current_y = this_line_y; | |
7422 | it.glyph_row = MATRIX_ROW (w->desired_matrix, this_line_vpos); | |
7423 | display_line (&it); | |
7424 | ||
a2889657 | 7425 | /* If line contains point, is not continued, |
5f5c8ee5 GM |
7426 | and ends at same distance from eob as before, we win */ |
7427 | if (w->cursor.vpos >= 0 | |
7428 | /* Line is not continued, otherwise this_line_start_pos | |
7429 | would have been set to 0 in display_line. */ | |
7430 | && CHARPOS (this_line_start_pos) | |
7431 | /* Line ends as before. */ | |
7432 | && CHARPOS (this_line_end_pos) == CHARPOS (tlendpos) | |
7433 | /* Line has same height as before. Otherwise other lines | |
7434 | would have to be shifted up or down. */ | |
7435 | && this_line_pixel_height == line_height_before) | |
a2889657 | 7436 | { |
5f5c8ee5 GM |
7437 | /* If this is not the window's last line, we must adjust |
7438 | the charstarts of the lines below. */ | |
7439 | if (it.current_y < it.last_visible_y) | |
7440 | { | |
7441 | struct glyph_row *row | |
7442 | = MATRIX_ROW (w->current_matrix, this_line_vpos + 1); | |
7443 | int delta, delta_bytes; | |
7444 | ||
7445 | if (Z - CHARPOS (tlendpos) == ZV) | |
7446 | { | |
7447 | /* This line ends at end of (accessible part of) | |
7448 | buffer. There is no newline to count. */ | |
7449 | delta = (Z | |
7450 | - CHARPOS (tlendpos) | |
7451 | - MATRIX_ROW_START_CHARPOS (row)); | |
7452 | delta_bytes = (Z_BYTE | |
7453 | - BYTEPOS (tlendpos) | |
7454 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7455 | } | |
7456 | else | |
7457 | { | |
7458 | /* This line ends in a newline. Must take | |
7459 | account of the newline and the rest of the | |
7460 | text that follows. */ | |
7461 | delta = (Z | |
7462 | - CHARPOS (tlendpos) | |
7463 | - MATRIX_ROW_START_CHARPOS (row)); | |
7464 | delta_bytes = (Z_BYTE | |
7465 | - BYTEPOS (tlendpos) | |
7466 | - MATRIX_ROW_START_BYTEPOS (row)); | |
7467 | } | |
7468 | ||
7469 | increment_glyph_matrix_buffer_positions (w->current_matrix, | |
7470 | this_line_vpos + 1, | |
7471 | w->current_matrix->nrows, | |
7472 | delta, delta_bytes); | |
85bcef6c | 7473 | } |
46db8486 | 7474 | |
5f5c8ee5 GM |
7475 | /* If this row displays text now but previously didn't, |
7476 | or vice versa, w->window_end_vpos may have to be | |
7477 | adjusted. */ | |
7478 | if ((it.glyph_row - 1)->displays_text_p) | |
7479 | { | |
7480 | if (XFASTINT (w->window_end_vpos) < this_line_vpos) | |
7481 | XSETINT (w->window_end_vpos, this_line_vpos); | |
7482 | } | |
7483 | else if (XFASTINT (w->window_end_vpos) == this_line_vpos | |
7484 | && this_line_vpos > 0) | |
7485 | XSETINT (w->window_end_vpos, this_line_vpos - 1); | |
7486 | w->window_end_valid = Qnil; | |
7487 | ||
7488 | /* Update hint: No need to try to scroll in update_window. */ | |
7489 | w->desired_matrix->no_scrolling_p = 1; | |
7490 | ||
7491 | #if GLYPH_DEBUG | |
7492 | *w->desired_matrix->method = 0; | |
7493 | debug_method_add (w, "optimization 1"); | |
7494 | #endif | |
a2889657 JB |
7495 | goto update; |
7496 | } | |
7497 | else | |
7498 | goto cancel; | |
7499 | } | |
5f5c8ee5 GM |
7500 | else if (/* Cursor position hasn't changed. */ |
7501 | PT == XFASTINT (w->last_point) | |
b6f0fe04 RS |
7502 | /* Make sure the cursor was last displayed |
7503 | in this window. Otherwise we have to reposition it. */ | |
5f5c8ee5 GM |
7504 | && 0 <= w->cursor.vpos |
7505 | && XINT (w->height) > w->cursor.vpos) | |
a2889657 JB |
7506 | { |
7507 | if (!must_finish) | |
7508 | { | |
c6e89d6c | 7509 | do_pending_window_change (1); |
5f5c8ee5 GM |
7510 | |
7511 | /* We used to always goto end_of_redisplay here, but this | |
7512 | isn't enough if we have a blinking cursor. */ | |
7513 | if (w->cursor_off_p == w->last_cursor_off_p) | |
7514 | goto end_of_redisplay; | |
a2889657 JB |
7515 | } |
7516 | goto update; | |
7517 | } | |
8b51f1e3 KH |
7518 | /* If highlighting the region, or if the cursor is in the echo area, |
7519 | then we can't just move the cursor. */ | |
bd66d1ba RS |
7520 | else if (! (!NILP (Vtransient_mark_mode) |
7521 | && !NILP (current_buffer->mark_active)) | |
293a54ce RS |
7522 | && (w == XWINDOW (current_buffer->last_selected_window) |
7523 | || highlight_nonselected_windows) | |
8b51f1e3 | 7524 | && NILP (w->region_showing) |
8f897821 | 7525 | && NILP (Vshow_trailing_whitespace) |
8b51f1e3 | 7526 | && !cursor_in_echo_area) |
a2889657 | 7527 | { |
5f5c8ee5 GM |
7528 | struct it it; |
7529 | struct glyph_row *row; | |
7530 | ||
7531 | /* Skip from tlbufpos to PT and see where it is. Note that | |
7532 | PT may be in invisible text. If so, we will end at the | |
7533 | next visible position. */ | |
7534 | init_iterator (&it, w, CHARPOS (tlbufpos), BYTEPOS (tlbufpos), | |
7535 | NULL, DEFAULT_FACE_ID); | |
7536 | it.current_x = this_line_start_x; | |
7537 | it.current_y = this_line_y; | |
7538 | it.vpos = this_line_vpos; | |
7539 | ||
7540 | /* The call to move_it_to stops in front of PT, but | |
7541 | moves over before-strings. */ | |
7542 | move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS); | |
7543 | ||
7544 | if (it.vpos == this_line_vpos | |
7545 | && (row = MATRIX_ROW (w->current_matrix, this_line_vpos), | |
7546 | row->enabled_p)) | |
a2889657 | 7547 | { |
5f5c8ee5 GM |
7548 | xassert (this_line_vpos == it.vpos); |
7549 | xassert (this_line_y == it.current_y); | |
7550 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
a2889657 JB |
7551 | goto update; |
7552 | } | |
7553 | else | |
7554 | goto cancel; | |
7555 | } | |
5f5c8ee5 | 7556 | |
a2889657 | 7557 | cancel: |
5f5c8ee5 GM |
7558 | /* Text changed drastically or point moved off of line. */ |
7559 | SET_MATRIX_ROW_ENABLED_P (w->desired_matrix, this_line_vpos, 0); | |
a2889657 JB |
7560 | } |
7561 | ||
5f5c8ee5 GM |
7562 | CHARPOS (this_line_start_pos) = 0; |
7563 | consider_all_windows_p |= buffer_shared > 1; | |
7564 | ++clear_face_cache_count; | |
a2889657 | 7565 | |
5f5c8ee5 GM |
7566 | |
7567 | /* Build desired matrices. If consider_all_windows_p is non-zero, | |
7568 | do it for all windows on all frames. Otherwise do it for | |
7569 | selected_window, only. */ | |
463f6b91 | 7570 | |
5f5c8ee5 | 7571 | if (consider_all_windows_p) |
a2889657 | 7572 | { |
35f56f96 | 7573 | Lisp_Object tail, frame; |
a2889657 | 7574 | |
5f5c8ee5 GM |
7575 | /* Clear the face cache eventually. */ |
7576 | if (clear_face_cache_count > CLEAR_FACE_CACHE_COUNT) | |
463f6b91 | 7577 | { |
5f5c8ee5 | 7578 | clear_face_cache (0); |
463f6b91 RS |
7579 | clear_face_cache_count = 0; |
7580 | } | |
31b24551 | 7581 | |
5f5c8ee5 GM |
7582 | /* Recompute # windows showing selected buffer. This will be |
7583 | incremented each time such a window is displayed. */ | |
a2889657 JB |
7584 | buffer_shared = 0; |
7585 | ||
35f56f96 | 7586 | FOR_EACH_FRAME (tail, frame) |
30c566e4 | 7587 | { |
5f5c8ee5 | 7588 | struct frame *f = XFRAME (frame); |
886bd6f2 | 7589 | if (FRAME_WINDOW_P (f) || f == sf) |
9769686d | 7590 | { |
5f5c8ee5 GM |
7591 | /* Mark all the scroll bars to be removed; we'll redeem |
7592 | the ones we want when we redisplay their windows. */ | |
9769686d RS |
7593 | if (condemn_scroll_bars_hook) |
7594 | (*condemn_scroll_bars_hook) (f); | |
30c566e4 | 7595 | |
f21ef775 | 7596 | if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
5f5c8ee5 | 7597 | redisplay_windows (FRAME_ROOT_WINDOW (f)); |
30c566e4 | 7598 | |
5f5c8ee5 GM |
7599 | /* Any scroll bars which redisplay_windows should have |
7600 | nuked should now go away. */ | |
9769686d RS |
7601 | if (judge_scroll_bars_hook) |
7602 | (*judge_scroll_bars_hook) (f); | |
7603 | } | |
30c566e4 | 7604 | } |
a2889657 | 7605 | } |
886bd6f2 GM |
7606 | else if (FRAME_VISIBLE_P (sf) |
7607 | && !FRAME_OBSCURED_P (sf)) | |
5f5c8ee5 GM |
7608 | redisplay_window (selected_window, 1); |
7609 | ||
7610 | ||
7611 | /* Compare desired and current matrices, perform output. */ | |
7612 | ||
7613 | update: | |
7614 | ||
7615 | /* If fonts changed, display again. */ | |
7616 | if (fonts_changed_p) | |
7617 | goto retry; | |
a2889657 | 7618 | |
a2889657 JB |
7619 | /* Prevent various kinds of signals during display update. |
7620 | stdio is not robust about handling signals, | |
7621 | which can cause an apparent I/O error. */ | |
7622 | if (interrupt_input) | |
7623 | unrequest_sigio (); | |
7624 | stop_polling (); | |
7625 | ||
5f5c8ee5 | 7626 | if (consider_all_windows_p) |
a2889657 JB |
7627 | { |
7628 | Lisp_Object tail; | |
92a90e89 GM |
7629 | struct frame *f; |
7630 | int hscrolled_p; | |
a2889657 JB |
7631 | |
7632 | pause = 0; | |
92a90e89 | 7633 | hscrolled_p = 0; |
a2889657 | 7634 | |
92a90e89 | 7635 | /* See if we have to hscroll. */ |
9472f927 | 7636 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
92a90e89 GM |
7637 | if (FRAMEP (XCAR (tail))) |
7638 | { | |
7639 | f = XFRAME (XCAR (tail)); | |
7640 | ||
7641 | if ((FRAME_WINDOW_P (f) | |
886bd6f2 | 7642 | || f == sf) |
92a90e89 GM |
7643 | && FRAME_VISIBLE_P (f) |
7644 | && !FRAME_OBSCURED_P (f) | |
7645 | && hscroll_windows (f->root_window)) | |
7646 | hscrolled_p = 1; | |
7647 | } | |
7648 | ||
7649 | if (hscrolled_p) | |
7650 | goto retry; | |
a2889657 | 7651 | |
92a90e89 GM |
7652 | for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail)) |
7653 | { | |
9472f927 | 7654 | if (!FRAMEP (XCAR (tail))) |
a2889657 JB |
7655 | continue; |
7656 | ||
9472f927 | 7657 | f = XFRAME (XCAR (tail)); |
1af9f229 | 7658 | |
886bd6f2 | 7659 | if ((FRAME_WINDOW_P (f) || f == sf) |
f21ef775 | 7660 | && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) |
a2889657 | 7661 | { |
5f5c8ee5 GM |
7662 | /* Mark all windows as to be updated. */ |
7663 | set_window_update_flags (XWINDOW (f->root_window), 1); | |
44fa5b1e | 7664 | pause |= update_frame (f, 0, 0); |
a2889657 | 7665 | if (!pause) |
efc63ef0 RS |
7666 | { |
7667 | mark_window_display_accurate (f->root_window, 1); | |
7668 | if (frame_up_to_date_hook != 0) | |
7669 | (*frame_up_to_date_hook) (f); | |
7670 | } | |
a2889657 JB |
7671 | } |
7672 | } | |
7673 | } | |
7674 | else | |
6e8290aa | 7675 | { |
886bd6f2 GM |
7676 | if (FRAME_VISIBLE_P (sf) |
7677 | && !FRAME_OBSCURED_P (sf)) | |
5f5c8ee5 | 7678 | { |
92a90e89 GM |
7679 | if (hscroll_windows (selected_window)) |
7680 | goto retry; | |
7681 | ||
5f5c8ee5 | 7682 | XWINDOW (selected_window)->must_be_updated_p = 1; |
886bd6f2 | 7683 | pause = update_frame (sf, 0, 0); |
5f5c8ee5 | 7684 | } |
4d641a15 KH |
7685 | else |
7686 | pause = 0; | |
d724d989 | 7687 | |
8de2d90b | 7688 | /* We may have called echo_area_display at the top of this |
44fa5b1e JB |
7689 | function. If the echo area is on another frame, that may |
7690 | have put text on a frame other than the selected one, so the | |
7691 | above call to update_frame would not have caught it. Catch | |
8de2d90b JB |
7692 | it here. */ |
7693 | { | |
84faf44c | 7694 | Lisp_Object mini_window; |
5f5c8ee5 | 7695 | struct frame *mini_frame; |
84faf44c | 7696 | |
886bd6f2 | 7697 | mini_window = FRAME_MINIBUF_WINDOW (sf); |
84faf44c | 7698 | mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window))); |
8de2d90b | 7699 | |
886bd6f2 | 7700 | if (mini_frame != sf && FRAME_WINDOW_P (mini_frame)) |
5f5c8ee5 GM |
7701 | { |
7702 | XWINDOW (mini_window)->must_be_updated_p = 1; | |
7703 | pause |= update_frame (mini_frame, 0, 0); | |
7704 | if (!pause && hscroll_windows (mini_window)) | |
7705 | goto retry; | |
7706 | } | |
8de2d90b | 7707 | } |
6e8290aa | 7708 | } |
a2889657 | 7709 | |
5f5c8ee5 GM |
7710 | /* If display was paused because of pending input, make sure we do a |
7711 | thorough update the next time. */ | |
a2889657 JB |
7712 | if (pause) |
7713 | { | |
5f5c8ee5 GM |
7714 | /* Prevent the optimization at the beginning of |
7715 | redisplay_internal that tries a single-line update of the | |
7716 | line containing the cursor in the selected window. */ | |
7717 | CHARPOS (this_line_start_pos) = 0; | |
7718 | ||
7719 | /* Let the overlay arrow be updated the next time. */ | |
265a9e55 | 7720 | if (!NILP (last_arrow_position)) |
a2889657 JB |
7721 | { |
7722 | last_arrow_position = Qt; | |
7723 | last_arrow_string = Qt; | |
7724 | } | |
5f5c8ee5 GM |
7725 | |
7726 | /* If we pause after scrolling, some rows in the current | |
7727 | matrices of some windows are not valid. */ | |
7728 | if (!WINDOW_FULL_WIDTH_P (w) | |
7729 | && !FRAME_WINDOW_P (XFRAME (w->frame))) | |
a2889657 JB |
7730 | update_mode_lines = 1; |
7731 | } | |
7732 | ||
5f5c8ee5 GM |
7733 | /* Now text on frame agrees with windows, so put info into the |
7734 | windows for partial redisplay to follow. */ | |
a2889657 JB |
7735 | if (!pause) |
7736 | { | |
7737 | register struct buffer *b = XBUFFER (w->buffer); | |
7738 | ||
9142dd5b GM |
7739 | BUF_UNCHANGED_MODIFIED (b) = BUF_MODIFF (b); |
7740 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b); | |
7741 | BUF_BEG_UNCHANGED (b) = BUF_GPT (b) - BUF_BEG (b); | |
7742 | BUF_END_UNCHANGED (b) = BUF_Z (b) - BUF_GPT (b); | |
a2889657 | 7743 | |
5f5c8ee5 | 7744 | if (consider_all_windows_p) |
886bd6f2 | 7745 | mark_window_display_accurate (FRAME_ROOT_WINDOW (sf), 1); |
a2889657 JB |
7746 | else |
7747 | { | |
5f5c8ee5 GM |
7748 | XSETFASTINT (w->last_point, BUF_PT (b)); |
7749 | w->last_cursor = w->cursor; | |
7750 | w->last_cursor_off_p = w->cursor_off_p; | |
7751 | ||
28995e67 | 7752 | b->clip_changed = 0; |
9142dd5b | 7753 | b->prevent_redisplay_optimizations_p = 0; |
a2889657 | 7754 | w->update_mode_line = Qnil; |
c2213350 | 7755 | XSETFASTINT (w->last_modified, BUF_MODIFF (b)); |
8850a573 | 7756 | XSETFASTINT (w->last_overlay_modified, BUF_OVERLAY_MODIFF (b)); |
538f13d4 RS |
7757 | w->last_had_star |
7758 | = (BUF_MODIFF (XBUFFER (w->buffer)) > BUF_SAVE_MODIFF (XBUFFER (w->buffer)) | |
7759 | ? Qt : Qnil); | |
3ee4159a RS |
7760 | |
7761 | /* Record if we are showing a region, so can make sure to | |
7762 | update it fully at next redisplay. */ | |
7763 | w->region_showing = (!NILP (Vtransient_mark_mode) | |
293a54ce RS |
7764 | && (w == XWINDOW (current_buffer->last_selected_window) |
7765 | || highlight_nonselected_windows) | |
3ee4159a RS |
7766 | && !NILP (XBUFFER (w->buffer)->mark_active) |
7767 | ? Fmarker_position (XBUFFER (w->buffer)->mark) | |
7768 | : Qnil); | |
7769 | ||
d2f84654 | 7770 | w->window_end_valid = w->buffer; |
d45de95b | 7771 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 | 7772 | last_arrow_string = Voverlay_arrow_string; |
efc63ef0 | 7773 | if (frame_up_to_date_hook != 0) |
886bd6f2 | 7774 | (*frame_up_to_date_hook) (sf); |
9142dd5b GM |
7775 | |
7776 | w->current_matrix->buffer = b; | |
7777 | w->current_matrix->begv = BUF_BEGV (b); | |
7778 | w->current_matrix->zv = BUF_ZV (b); | |
a2889657 | 7779 | } |
5f5c8ee5 | 7780 | |
a2889657 JB |
7781 | update_mode_lines = 0; |
7782 | windows_or_buffers_changed = 0; | |
7783 | } | |
7784 | ||
5f5c8ee5 GM |
7785 | /* Start SIGIO interrupts coming again. Having them off during the |
7786 | code above makes it less likely one will discard output, but not | |
7787 | impossible, since there might be stuff in the system buffer here. | |
a2889657 | 7788 | But it is much hairier to try to do anything about that. */ |
a2889657 JB |
7789 | if (interrupt_input) |
7790 | request_sigio (); | |
7791 | start_polling (); | |
7792 | ||
5f5c8ee5 GM |
7793 | /* If a frame has become visible which was not before, redisplay |
7794 | again, so that we display it. Expose events for such a frame | |
7795 | (which it gets when becoming visible) don't call the parts of | |
7796 | redisplay constructing glyphs, so simply exposing a frame won't | |
7797 | display anything in this case. So, we have to display these | |
7798 | frames here explicitly. */ | |
11c52c4f RS |
7799 | if (!pause) |
7800 | { | |
7801 | Lisp_Object tail, frame; | |
7802 | int new_count = 0; | |
7803 | ||
7804 | FOR_EACH_FRAME (tail, frame) | |
7805 | { | |
7806 | int this_is_visible = 0; | |
8e83f802 RS |
7807 | |
7808 | if (XFRAME (frame)->visible) | |
7809 | this_is_visible = 1; | |
7810 | FRAME_SAMPLE_VISIBILITY (XFRAME (frame)); | |
7811 | if (XFRAME (frame)->visible) | |
7812 | this_is_visible = 1; | |
11c52c4f RS |
7813 | |
7814 | if (this_is_visible) | |
7815 | new_count++; | |
7816 | } | |
7817 | ||
89819bdd | 7818 | if (new_count != number_of_visible_frames) |
11c52c4f RS |
7819 | windows_or_buffers_changed++; |
7820 | } | |
7821 | ||
44fa5b1e | 7822 | /* Change frame size now if a change is pending. */ |
c6e89d6c | 7823 | do_pending_window_change (1); |
d8e242fd | 7824 | |
8b32d885 RS |
7825 | /* If we just did a pending size change, or have additional |
7826 | visible frames, redisplay again. */ | |
3c8c72e0 | 7827 | if (windows_or_buffers_changed && !pause) |
8b32d885 | 7828 | goto retry; |
5f5c8ee5 GM |
7829 | |
7830 | end_of_redisplay:; | |
c6e89d6c | 7831 | |
28514cd9 | 7832 | unbind_to (count, Qnil); |
a2889657 JB |
7833 | } |
7834 | ||
5f5c8ee5 GM |
7835 | |
7836 | /* Redisplay, but leave alone any recent echo area message unless | |
7837 | another message has been requested in its place. | |
a2889657 JB |
7838 | |
7839 | This is useful in situations where you need to redisplay but no | |
7840 | user action has occurred, making it inappropriate for the message | |
7841 | area to be cleared. See tracking_off and | |
7842 | wait_reading_process_input for examples of these situations. */ | |
7843 | ||
8991bb31 | 7844 | void |
a2889657 JB |
7845 | redisplay_preserve_echo_area () |
7846 | { | |
c6e89d6c | 7847 | if (!NILP (echo_area_buffer[1])) |
a2889657 | 7848 | { |
c6e89d6c GM |
7849 | /* We have a previously displayed message, but no current |
7850 | message. Redisplay the previous message. */ | |
7851 | display_last_displayed_message_p = 1; | |
e9874cee | 7852 | redisplay_internal (1); |
c6e89d6c | 7853 | display_last_displayed_message_p = 0; |
a2889657 JB |
7854 | } |
7855 | else | |
e9874cee | 7856 | redisplay_internal (1); |
a2889657 JB |
7857 | } |
7858 | ||
5f5c8ee5 | 7859 | |
28514cd9 GM |
7860 | /* Function registered with record_unwind_protect in |
7861 | redisplay_internal. Clears the flag indicating that a redisplay is | |
7862 | in progress. */ | |
7863 | ||
7864 | static Lisp_Object | |
7865 | unwind_redisplay (old_redisplaying_p) | |
7866 | Lisp_Object old_redisplaying_p; | |
7867 | { | |
7868 | redisplaying_p = XFASTINT (old_redisplaying_p); | |
c6e89d6c | 7869 | return Qnil; |
28514cd9 GM |
7870 | } |
7871 | ||
7872 | ||
5f5c8ee5 GM |
7873 | /* Mark the display of windows in the window tree rooted at WINDOW as |
7874 | accurate or inaccurate. If FLAG is non-zero mark display of WINDOW | |
7875 | as accurate. If FLAG is zero arrange for WINDOW to be redisplayed | |
7876 | the next time redisplay_internal is called. */ | |
7877 | ||
a2889657 | 7878 | void |
5f5c8ee5 | 7879 | mark_window_display_accurate (window, accurate_p) |
a2889657 | 7880 | Lisp_Object window; |
5f5c8ee5 | 7881 | int accurate_p; |
a2889657 | 7882 | { |
5f5c8ee5 GM |
7883 | struct window *w; |
7884 | ||
7885 | for (; !NILP (window); window = w->next) | |
a2889657 JB |
7886 | { |
7887 | w = XWINDOW (window); | |
7888 | ||
5f5c8ee5 | 7889 | if (BUFFERP (w->buffer)) |
bd66d1ba | 7890 | { |
5f5c8ee5 GM |
7891 | struct buffer *b = XBUFFER (w->buffer); |
7892 | ||
c2213350 | 7893 | XSETFASTINT (w->last_modified, |
5f5c8ee5 | 7894 | accurate_p ? BUF_MODIFF (b) : 0); |
8850a573 | 7895 | XSETFASTINT (w->last_overlay_modified, |
5f5c8ee5 GM |
7896 | accurate_p ? BUF_OVERLAY_MODIFF (b) : 0); |
7897 | w->last_had_star = (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) | |
7898 | ? Qt : Qnil); | |
bd66d1ba | 7899 | |
5f5c8ee5 GM |
7900 | #if 0 /* I don't think this is necessary because display_line does it. |
7901 | Let's check it. */ | |
bd66d1ba RS |
7902 | /* Record if we are showing a region, so can make sure to |
7903 | update it fully at next redisplay. */ | |
5f5c8ee5 GM |
7904 | w->region_showing |
7905 | = (!NILP (Vtransient_mark_mode) | |
7906 | && (w == XWINDOW (current_buffer->last_selected_window) | |
7907 | || highlight_nonselected_windows) | |
7908 | && (!NILP (b->mark_active) | |
7909 | ? Fmarker_position (b->mark) | |
7910 | : Qnil)); | |
7911 | #endif | |
7912 | ||
7913 | if (accurate_p) | |
7914 | { | |
7915 | b->clip_changed = 0; | |
9142dd5b GM |
7916 | b->prevent_redisplay_optimizations_p = 0; |
7917 | w->current_matrix->buffer = b; | |
7918 | w->current_matrix->begv = BUF_BEGV (b); | |
7919 | w->current_matrix->zv = BUF_ZV (b); | |
5f5c8ee5 GM |
7920 | w->last_cursor = w->cursor; |
7921 | w->last_cursor_off_p = w->cursor_off_p; | |
7922 | if (w == XWINDOW (selected_window)) | |
7923 | w->last_point = BUF_PT (b); | |
7924 | else | |
7925 | w->last_point = XMARKER (w->pointm)->charpos; | |
7926 | } | |
bd66d1ba RS |
7927 | } |
7928 | ||
d2f84654 | 7929 | w->window_end_valid = w->buffer; |
a2889657 JB |
7930 | w->update_mode_line = Qnil; |
7931 | ||
265a9e55 | 7932 | if (!NILP (w->vchild)) |
5f5c8ee5 | 7933 | mark_window_display_accurate (w->vchild, accurate_p); |
265a9e55 | 7934 | if (!NILP (w->hchild)) |
5f5c8ee5 | 7935 | mark_window_display_accurate (w->hchild, accurate_p); |
a2889657 JB |
7936 | } |
7937 | ||
5f5c8ee5 | 7938 | if (accurate_p) |
a2889657 | 7939 | { |
d45de95b | 7940 | last_arrow_position = COERCE_MARKER (Voverlay_arrow_position); |
a2889657 JB |
7941 | last_arrow_string = Voverlay_arrow_string; |
7942 | } | |
7943 | else | |
7944 | { | |
5f5c8ee5 GM |
7945 | /* Force a thorough redisplay the next time by setting |
7946 | last_arrow_position and last_arrow_string to t, which is | |
7947 | unequal to any useful value of Voverlay_arrow_... */ | |
a2889657 JB |
7948 | last_arrow_position = Qt; |
7949 | last_arrow_string = Qt; | |
7950 | } | |
7951 | } | |
5f5c8ee5 GM |
7952 | |
7953 | ||
7954 | /* Return value in display table DP (Lisp_Char_Table *) for character | |
7955 | C. Since a display table doesn't have any parent, we don't have to | |
7956 | follow parent. Do not call this function directly but use the | |
7957 | macro DISP_CHAR_VECTOR. */ | |
7958 | ||
7959 | Lisp_Object | |
7960 | disp_char_vector (dp, c) | |
7961 | struct Lisp_Char_Table *dp; | |
7962 | int c; | |
7963 | { | |
7964 | int code[4], i; | |
7965 | Lisp_Object val; | |
7966 | ||
7967 | if (SINGLE_BYTE_CHAR_P (c)) | |
7968 | return (dp->contents[c]); | |
7969 | ||
7970 | SPLIT_NON_ASCII_CHAR (c, code[0], code[1], code[2]); | |
260a86a0 KH |
7971 | if (code[1] < 32) |
7972 | code[1] = -1; | |
7973 | else if (code[2] < 32) | |
7974 | code[2] = -1; | |
5f5c8ee5 GM |
7975 | |
7976 | /* Here, the possible range of code[0] (== charset ID) is | |
7977 | 128..max_charset. Since the top level char table contains data | |
7978 | for multibyte characters after 256th element, we must increment | |
7979 | code[0] by 128 to get a correct index. */ | |
7980 | code[0] += 128; | |
7981 | code[3] = -1; /* anchor */ | |
7982 | ||
7983 | for (i = 0; code[i] >= 0; i++, dp = XCHAR_TABLE (val)) | |
7984 | { | |
7985 | val = dp->contents[code[i]]; | |
7986 | if (!SUB_CHAR_TABLE_P (val)) | |
7987 | return (NILP (val) ? dp->defalt : val); | |
7988 | } | |
7989 | ||
7990 | /* Here, val is a sub char table. We return the default value of | |
7991 | it. */ | |
7992 | return (dp->defalt); | |
7993 | } | |
7994 | ||
7995 | ||
a2889657 | 7996 | \f |
5f5c8ee5 GM |
7997 | /*********************************************************************** |
7998 | Window Redisplay | |
7999 | ***********************************************************************/ | |
a2725ab2 | 8000 | |
5f5c8ee5 | 8001 | /* Redisplay all leaf windows in the window tree rooted at WINDOW. */ |
90adcf20 RS |
8002 | |
8003 | static void | |
5f5c8ee5 GM |
8004 | redisplay_windows (window) |
8005 | Lisp_Object window; | |
90adcf20 | 8006 | { |
5f5c8ee5 GM |
8007 | while (!NILP (window)) |
8008 | { | |
8009 | struct window *w = XWINDOW (window); | |
8010 | ||
8011 | if (!NILP (w->hchild)) | |
8012 | redisplay_windows (w->hchild); | |
8013 | else if (!NILP (w->vchild)) | |
8014 | redisplay_windows (w->vchild); | |
8015 | else | |
8016 | redisplay_window (window, 0); | |
a2725ab2 | 8017 | |
5f5c8ee5 GM |
8018 | window = w->next; |
8019 | } | |
8020 | } | |
8021 | ||
8022 | ||
8023 | /* Set cursor position of W. PT is assumed to be displayed in ROW. | |
8024 | DELTA is the number of bytes by which positions recorded in ROW | |
8025 | differ from current buffer positions. */ | |
8026 | ||
8027 | void | |
8028 | set_cursor_from_row (w, row, matrix, delta, delta_bytes, dy, dvpos) | |
8029 | struct window *w; | |
8030 | struct glyph_row *row; | |
8031 | struct glyph_matrix *matrix; | |
8032 | int delta, delta_bytes, dy, dvpos; | |
8033 | { | |
8034 | struct glyph *glyph = row->glyphs[TEXT_AREA]; | |
8035 | struct glyph *end = glyph + row->used[TEXT_AREA]; | |
8036 | int x = row->x; | |
8037 | int pt_old = PT - delta; | |
8038 | ||
8039 | /* Skip over glyphs not having an object at the start of the row. | |
8040 | These are special glyphs like truncation marks on terminal | |
8041 | frames. */ | |
8042 | if (row->displays_text_p) | |
8043 | while (glyph < end | |
8044 | && !glyph->object | |
8045 | && glyph->charpos < 0) | |
8046 | { | |
8047 | x += glyph->pixel_width; | |
8048 | ++glyph; | |
8049 | } | |
8050 | ||
8051 | while (glyph < end | |
8052 | && glyph->object | |
8053 | && (!BUFFERP (glyph->object) | |
8054 | || glyph->charpos < pt_old)) | |
8055 | { | |
8056 | x += glyph->pixel_width; | |
8057 | ++glyph; | |
8058 | } | |
8059 | ||
8060 | w->cursor.hpos = glyph - row->glyphs[TEXT_AREA]; | |
8061 | w->cursor.x = x; | |
8062 | w->cursor.vpos = MATRIX_ROW_VPOS (row, matrix) + dvpos; | |
8063 | w->cursor.y = row->y + dy; | |
8064 | ||
8065 | if (w == XWINDOW (selected_window)) | |
8066 | { | |
8067 | if (!row->continued_p | |
8068 | && !MATRIX_ROW_CONTINUATION_LINE_P (row) | |
8069 | && row->x == 0) | |
8070 | { | |
8071 | this_line_buffer = XBUFFER (w->buffer); | |
8072 | ||
8073 | CHARPOS (this_line_start_pos) | |
8074 | = MATRIX_ROW_START_CHARPOS (row) + delta; | |
8075 | BYTEPOS (this_line_start_pos) | |
8076 | = MATRIX_ROW_START_BYTEPOS (row) + delta_bytes; | |
8077 | ||
8078 | CHARPOS (this_line_end_pos) | |
8079 | = Z - (MATRIX_ROW_END_CHARPOS (row) + delta); | |
8080 | BYTEPOS (this_line_end_pos) | |
8081 | = Z_BYTE - (MATRIX_ROW_END_BYTEPOS (row) + delta_bytes); | |
8082 | ||
8083 | this_line_y = w->cursor.y; | |
8084 | this_line_pixel_height = row->height; | |
8085 | this_line_vpos = w->cursor.vpos; | |
8086 | this_line_start_x = row->x; | |
8087 | } | |
8088 | else | |
8089 | CHARPOS (this_line_start_pos) = 0; | |
8090 | } | |
8091 | } | |
8092 | ||
8093 | ||
8094 | /* Run window scroll functions, if any, for WINDOW with new window | |
756a3cb6 RS |
8095 | start STARTP. Sets the window start of WINDOW to that position. |
8096 | ||
8097 | We assume that the window's buffer is really current. */ | |
5f5c8ee5 GM |
8098 | |
8099 | static INLINE struct text_pos | |
8100 | run_window_scroll_functions (window, startp) | |
8101 | Lisp_Object window; | |
8102 | struct text_pos startp; | |
8103 | { | |
8104 | struct window *w = XWINDOW (window); | |
8105 | SET_MARKER_FROM_TEXT_POS (w->start, startp); | |
756a3cb6 RS |
8106 | |
8107 | if (current_buffer != XBUFFER (w->buffer)) | |
8108 | abort (); | |
8109 | ||
5f5c8ee5 GM |
8110 | if (!NILP (Vwindow_scroll_functions)) |
8111 | { | |
8112 | run_hook_with_args_2 (Qwindow_scroll_functions, window, | |
8113 | make_number (CHARPOS (startp))); | |
8114 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
756a3cb6 RS |
8115 | /* In case the hook functions switch buffers. */ |
8116 | if (current_buffer != XBUFFER (w->buffer)) | |
8117 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8118 | } |
90adcf20 | 8119 | |
5f5c8ee5 GM |
8120 | return startp; |
8121 | } | |
8122 | ||
8123 | ||
8124 | /* Modify the desired matrix of window W and W->vscroll so that the | |
8125 | line containing the cursor is fully visible. */ | |
8126 | ||
8127 | static void | |
8128 | make_cursor_line_fully_visible (w) | |
8129 | struct window *w; | |
8130 | { | |
8131 | struct glyph_matrix *matrix; | |
8132 | struct glyph_row *row; | |
045dee35 | 8133 | int header_line_height; |
5f5c8ee5 GM |
8134 | |
8135 | /* It's not always possible to find the cursor, e.g, when a window | |
8136 | is full of overlay strings. Don't do anything in that case. */ | |
8137 | if (w->cursor.vpos < 0) | |
8138 | return; | |
8139 | ||
8140 | matrix = w->desired_matrix; | |
8141 | row = MATRIX_ROW (matrix, w->cursor.vpos); | |
8142 | ||
8143 | /* If row->y == top y of window display area, the window isn't tall | |
8144 | enough to display a single line. There is nothing we can do | |
8145 | about it. */ | |
045dee35 GM |
8146 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
8147 | if (row->y == header_line_height) | |
5f5c8ee5 GM |
8148 | return; |
8149 | ||
8150 | if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row)) | |
8151 | { | |
8152 | int dy = row->height - row->visible_height; | |
8153 | w->vscroll = 0; | |
8154 | w->cursor.y += dy; | |
8155 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
8156 | } | |
8157 | else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) | |
8158 | { | |
8159 | int dy = - (row->height - row->visible_height); | |
8160 | w->vscroll = dy; | |
8161 | w->cursor.y += dy; | |
8162 | shift_glyph_matrix (w, matrix, 0, matrix->nrows, dy); | |
8163 | } | |
8164 | ||
8165 | /* When we change the cursor y-position of the selected window, | |
8166 | change this_line_y as well so that the display optimization for | |
8167 | the cursor line of the selected window in redisplay_internal uses | |
8168 | the correct y-position. */ | |
8169 | if (w == XWINDOW (selected_window)) | |
8170 | this_line_y = w->cursor.y; | |
8171 | } | |
8172 | ||
8173 | ||
8174 | /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P | |
8175 | non-zero means only WINDOW is redisplayed in redisplay_internal. | |
8176 | TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used | |
8177 | in redisplay_window to bring a partially visible line into view in | |
8178 | the case that only the cursor has moved. | |
8179 | ||
8180 | Value is | |
8181 | ||
8182 | 1 if scrolling succeeded | |
8183 | ||
8184 | 0 if scrolling didn't find point. | |
8185 | ||
8186 | -1 if new fonts have been loaded so that we must interrupt | |
8187 | redisplay, adjust glyph matrices, and try again. */ | |
8188 | ||
8189 | static int | |
8190 | try_scrolling (window, just_this_one_p, scroll_conservatively, | |
8191 | scroll_step, temp_scroll_step) | |
8192 | Lisp_Object window; | |
8193 | int just_this_one_p; | |
8194 | int scroll_conservatively, scroll_step; | |
8195 | int temp_scroll_step; | |
8196 | { | |
8197 | struct window *w = XWINDOW (window); | |
8198 | struct frame *f = XFRAME (w->frame); | |
8199 | struct text_pos scroll_margin_pos; | |
8200 | struct text_pos pos; | |
8201 | struct text_pos startp; | |
8202 | struct it it; | |
8203 | Lisp_Object window_end; | |
8204 | int this_scroll_margin; | |
8205 | int dy = 0; | |
8206 | int scroll_max; | |
8207 | int line_height, rc; | |
8208 | int amount_to_scroll = 0; | |
8209 | Lisp_Object aggressive; | |
8210 | int height; | |
8211 | ||
8212 | #if GLYPH_DEBUG | |
8213 | debug_method_add (w, "try_scrolling"); | |
78614721 | 8214 | #endif |
5f5c8ee5 GM |
8215 | |
8216 | SET_TEXT_POS_FROM_MARKER (startp, w->start); | |
8217 | ||
8218 | /* Compute scroll margin height in pixels. We scroll when point is | |
8219 | within this distance from the top or bottom of the window. */ | |
8220 | if (scroll_margin > 0) | |
90adcf20 | 8221 | { |
5f5c8ee5 GM |
8222 | this_scroll_margin = min (scroll_margin, XINT (w->height) / 4); |
8223 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8224 | } | |
8225 | else | |
8226 | this_scroll_margin = 0; | |
8227 | ||
8228 | /* Compute how much we should try to scroll maximally to bring point | |
8229 | into view. */ | |
8230 | if (scroll_step) | |
8231 | scroll_max = scroll_step; | |
8232 | else if (scroll_conservatively) | |
8233 | scroll_max = scroll_conservatively; | |
8234 | else if (temp_scroll_step) | |
8235 | scroll_max = temp_scroll_step; | |
8236 | else if (NUMBERP (current_buffer->scroll_down_aggressively) | |
8237 | || NUMBERP (current_buffer->scroll_up_aggressively)) | |
8238 | /* We're trying to scroll because of aggressive scrolling | |
8239 | but no scroll_step is set. Choose an arbitrary one. Maybe | |
8240 | there should be a variable for this. */ | |
8241 | scroll_max = 10; | |
8242 | else | |
8243 | scroll_max = 0; | |
8244 | scroll_max *= CANON_Y_UNIT (f); | |
8245 | ||
8246 | /* Decide whether we have to scroll down. Start at the window end | |
8247 | and move this_scroll_margin up to find the position of the scroll | |
8248 | margin. */ | |
8249 | window_end = Fwindow_end (window, Qt); | |
8250 | CHARPOS (scroll_margin_pos) = XINT (window_end); | |
8251 | BYTEPOS (scroll_margin_pos) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos)); | |
8252 | if (this_scroll_margin) | |
8253 | { | |
8254 | start_display (&it, w, scroll_margin_pos); | |
8255 | move_it_vertically (&it, - this_scroll_margin); | |
8256 | scroll_margin_pos = it.current.pos; | |
8257 | } | |
8258 | ||
8259 | if (PT >= CHARPOS (scroll_margin_pos)) | |
8260 | { | |
8261 | int y0; | |
8262 | ||
8263 | /* Point is in the scroll margin at the bottom of the window, or | |
8264 | below. Compute a new window start that makes point visible. */ | |
8265 | ||
8266 | /* Compute the distance from the scroll margin to PT. | |
8267 | Give up if the distance is greater than scroll_max. */ | |
8268 | start_display (&it, w, scroll_margin_pos); | |
8269 | y0 = it.current_y; | |
8270 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8271 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8272 | line_height = (it.max_ascent + it.max_descent | |
8273 | ? it.max_ascent + it.max_descent | |
8274 | : last_height); | |
8275 | dy = it.current_y + line_height - y0; | |
8276 | if (dy > scroll_max) | |
8277 | return 0; | |
8278 | ||
8279 | /* Move the window start down. If scrolling conservatively, | |
8280 | move it just enough down to make point visible. If | |
8281 | scroll_step is set, move it down by scroll_step. */ | |
8282 | start_display (&it, w, startp); | |
8283 | ||
8284 | if (scroll_conservatively) | |
8285 | amount_to_scroll = dy; | |
8286 | else if (scroll_step || temp_scroll_step) | |
8287 | amount_to_scroll = scroll_max; | |
8288 | else | |
90adcf20 | 8289 | { |
5f5c8ee5 GM |
8290 | aggressive = current_buffer->scroll_down_aggressively; |
8291 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8292 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8293 | if (NUMBERP (aggressive)) |
8294 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8295 | } | |
a2725ab2 | 8296 | |
5f5c8ee5 GM |
8297 | if (amount_to_scroll <= 0) |
8298 | return 0; | |
a2725ab2 | 8299 | |
5f5c8ee5 GM |
8300 | move_it_vertically (&it, amount_to_scroll); |
8301 | startp = it.current.pos; | |
8302 | } | |
8303 | else | |
8304 | { | |
8305 | /* See if point is inside the scroll margin at the top of the | |
8306 | window. */ | |
8307 | scroll_margin_pos = startp; | |
8308 | if (this_scroll_margin) | |
8309 | { | |
8310 | start_display (&it, w, startp); | |
8311 | move_it_vertically (&it, this_scroll_margin); | |
8312 | scroll_margin_pos = it.current.pos; | |
8313 | } | |
8314 | ||
8315 | if (PT < CHARPOS (scroll_margin_pos)) | |
8316 | { | |
8317 | /* Point is in the scroll margin at the top of the window or | |
8318 | above what is displayed in the window. */ | |
8319 | int y0; | |
8320 | ||
8321 | /* Compute the vertical distance from PT to the scroll | |
8322 | margin position. Give up if distance is greater than | |
8323 | scroll_max. */ | |
8324 | SET_TEXT_POS (pos, PT, PT_BYTE); | |
8325 | start_display (&it, w, pos); | |
8326 | y0 = it.current_y; | |
8327 | move_it_to (&it, CHARPOS (scroll_margin_pos), 0, | |
8328 | it.last_visible_y, -1, | |
8329 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8330 | dy = it.current_y - y0; | |
8331 | if (dy > scroll_max) | |
8332 | return 0; | |
8333 | ||
8334 | /* Compute new window start. */ | |
8335 | start_display (&it, w, startp); | |
8336 | ||
8337 | if (scroll_conservatively) | |
8338 | amount_to_scroll = dy; | |
8339 | else if (scroll_step || temp_scroll_step) | |
8340 | amount_to_scroll = scroll_max; | |
538f13d4 | 8341 | else |
5f5c8ee5 GM |
8342 | { |
8343 | aggressive = current_buffer->scroll_up_aggressively; | |
8344 | height = (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w) | |
045dee35 | 8345 | - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w)); |
5f5c8ee5 GM |
8346 | if (NUMBERP (aggressive)) |
8347 | amount_to_scroll = XFLOATINT (aggressive) * height; | |
8348 | } | |
a2725ab2 | 8349 | |
5f5c8ee5 GM |
8350 | if (amount_to_scroll <= 0) |
8351 | return 0; | |
8352 | ||
8353 | move_it_vertically (&it, - amount_to_scroll); | |
8354 | startp = it.current.pos; | |
90adcf20 RS |
8355 | } |
8356 | } | |
a2889657 | 8357 | |
5f5c8ee5 GM |
8358 | /* Run window scroll functions. */ |
8359 | startp = run_window_scroll_functions (window, startp); | |
90adcf20 | 8360 | |
5f5c8ee5 GM |
8361 | /* Display the window. Give up if new fonts are loaded, or if point |
8362 | doesn't appear. */ | |
8363 | if (!try_window (window, startp)) | |
8364 | rc = -1; | |
8365 | else if (w->cursor.vpos < 0) | |
8366 | { | |
8367 | clear_glyph_matrix (w->desired_matrix); | |
8368 | rc = 0; | |
8369 | } | |
8370 | else | |
8371 | { | |
8372 | /* Maybe forget recorded base line for line number display. */ | |
8373 | if (!just_this_one_p | |
8374 | || current_buffer->clip_changed | |
9142dd5b | 8375 | || BEG_UNCHANGED < CHARPOS (startp)) |
5f5c8ee5 GM |
8376 | w->base_line_number = Qnil; |
8377 | ||
8378 | /* If cursor ends up on a partially visible line, shift display | |
8379 | lines up or down. */ | |
8380 | make_cursor_line_fully_visible (w); | |
8381 | rc = 1; | |
8382 | } | |
8383 | ||
8384 | return rc; | |
a2889657 JB |
8385 | } |
8386 | ||
5f5c8ee5 GM |
8387 | |
8388 | /* Compute a suitable window start for window W if display of W starts | |
8389 | on a continuation line. Value is non-zero if a new window start | |
8390 | was computed. | |
8391 | ||
8392 | The new window start will be computed, based on W's width, starting | |
8393 | from the start of the continued line. It is the start of the | |
8394 | screen line with the minimum distance from the old start W->start. */ | |
8395 | ||
8396 | static int | |
8397 | compute_window_start_on_continuation_line (w) | |
8398 | struct window *w; | |
1f1ff51d | 8399 | { |
5f5c8ee5 GM |
8400 | struct text_pos pos, start_pos; |
8401 | int window_start_changed_p = 0; | |
1f1ff51d | 8402 | |
5f5c8ee5 | 8403 | SET_TEXT_POS_FROM_MARKER (start_pos, w->start); |
1f1ff51d | 8404 | |
5f5c8ee5 GM |
8405 | /* If window start is on a continuation line... Window start may be |
8406 | < BEGV in case there's invisible text at the start of the | |
8407 | buffer (M-x rmail, for example). */ | |
8408 | if (CHARPOS (start_pos) > BEGV | |
8409 | && FETCH_BYTE (BYTEPOS (start_pos) - 1) != '\n') | |
1f1ff51d | 8410 | { |
5f5c8ee5 GM |
8411 | struct it it; |
8412 | struct glyph_row *row; | |
f3751a65 GM |
8413 | |
8414 | /* Handle the case that the window start is out of range. */ | |
8415 | if (CHARPOS (start_pos) < BEGV) | |
8416 | SET_TEXT_POS (start_pos, BEGV, BEGV_BYTE); | |
8417 | else if (CHARPOS (start_pos) > ZV) | |
8418 | SET_TEXT_POS (start_pos, ZV, ZV_BYTE); | |
5f5c8ee5 GM |
8419 | |
8420 | /* Find the start of the continued line. This should be fast | |
8421 | because scan_buffer is fast (newline cache). */ | |
045dee35 | 8422 | row = w->desired_matrix->rows + (WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0); |
5f5c8ee5 GM |
8423 | init_iterator (&it, w, CHARPOS (start_pos), BYTEPOS (start_pos), |
8424 | row, DEFAULT_FACE_ID); | |
8425 | reseat_at_previous_visible_line_start (&it); | |
8426 | ||
8427 | /* If the line start is "too far" away from the window start, | |
8428 | say it takes too much time to compute a new window start. */ | |
8429 | if (CHARPOS (start_pos) - IT_CHARPOS (it) | |
8430 | < XFASTINT (w->height) * XFASTINT (w->width)) | |
8431 | { | |
8432 | int min_distance, distance; | |
8433 | ||
8434 | /* Move forward by display lines to find the new window | |
8435 | start. If window width was enlarged, the new start can | |
8436 | be expected to be > the old start. If window width was | |
8437 | decreased, the new window start will be < the old start. | |
8438 | So, we're looking for the display line start with the | |
8439 | minimum distance from the old window start. */ | |
8440 | pos = it.current.pos; | |
8441 | min_distance = INFINITY; | |
8442 | while ((distance = abs (CHARPOS (start_pos) - IT_CHARPOS (it))), | |
8443 | distance < min_distance) | |
8444 | { | |
8445 | min_distance = distance; | |
8446 | pos = it.current.pos; | |
8447 | move_it_by_lines (&it, 1, 0); | |
8448 | } | |
8449 | ||
8450 | /* Set the window start there. */ | |
8451 | SET_MARKER_FROM_TEXT_POS (w->start, pos); | |
8452 | window_start_changed_p = 1; | |
8453 | } | |
1f1ff51d | 8454 | } |
5f5c8ee5 GM |
8455 | |
8456 | return window_start_changed_p; | |
1f1ff51d KH |
8457 | } |
8458 | ||
5f5c8ee5 GM |
8459 | |
8460 | /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only | |
8461 | selected_window is redisplayed. */ | |
90adcf20 | 8462 | |
a2889657 | 8463 | static void |
5f5c8ee5 | 8464 | redisplay_window (window, just_this_one_p) |
a2889657 | 8465 | Lisp_Object window; |
5f5c8ee5 | 8466 | int just_this_one_p; |
a2889657 | 8467 | { |
5f5c8ee5 GM |
8468 | struct window *w = XWINDOW (window); |
8469 | struct frame *f = XFRAME (w->frame); | |
8470 | struct buffer *buffer = XBUFFER (w->buffer); | |
a2889657 | 8471 | struct buffer *old = current_buffer; |
5f5c8ee5 | 8472 | struct text_pos lpoint, opoint, startp; |
e481f960 | 8473 | int update_mode_line; |
5f5c8ee5 GM |
8474 | int tem; |
8475 | struct it it; | |
8476 | /* Record it now because it's overwritten. */ | |
8477 | int current_matrix_up_to_date_p = 0; | |
5ba50c51 | 8478 | int really_switched_buffer = 0; |
5f5c8ee5 | 8479 | int temp_scroll_step = 0; |
2e54982e | 8480 | int count = specpdl_ptr - specpdl; |
a2889657 | 8481 | |
5f5c8ee5 GM |
8482 | SET_TEXT_POS (lpoint, PT, PT_BYTE); |
8483 | opoint = lpoint; | |
a2889657 | 8484 | |
5f5c8ee5 GM |
8485 | /* W must be a leaf window here. */ |
8486 | xassert (!NILP (w->buffer)); | |
8487 | #if GLYPH_DEBUG | |
8488 | *w->desired_matrix->method = 0; | |
8489 | #endif | |
2e54982e RS |
8490 | |
8491 | specbind (Qinhibit_point_motion_hooks, Qt); | |
9142dd5b GM |
8492 | |
8493 | reconsider_clip_changes (w, buffer); | |
8494 | ||
5f5c8ee5 GM |
8495 | /* Has the mode line to be updated? */ |
8496 | update_mode_line = (!NILP (w->update_mode_line) | |
8497 | || update_mode_lines | |
8498 | || buffer->clip_changed); | |
8de2d90b JB |
8499 | |
8500 | if (MINI_WINDOW_P (w)) | |
8501 | { | |
5f5c8ee5 | 8502 | if (w == XWINDOW (echo_area_window) |
c6e89d6c | 8503 | && !NILP (echo_area_buffer[0])) |
5f5c8ee5 GM |
8504 | { |
8505 | if (update_mode_line) | |
8506 | /* We may have to update a tty frame's menu bar or a | |
e037b9ec | 8507 | tool-bar. Example `M-x C-h C-h C-g'. */ |
5f5c8ee5 GM |
8508 | goto finish_menu_bars; |
8509 | else | |
8510 | /* We've already displayed the echo area glyphs in this window. */ | |
8511 | goto finish_scroll_bars; | |
8512 | } | |
73af359d | 8513 | else if (w != XWINDOW (minibuf_window)) |
8de2d90b | 8514 | { |
5f5c8ee5 GM |
8515 | /* W is a mini-buffer window, but it's not the currently |
8516 | active one, so clear it. */ | |
8517 | int yb = window_text_bottom_y (w); | |
8518 | struct glyph_row *row; | |
8519 | int y; | |
8520 | ||
8521 | for (y = 0, row = w->desired_matrix->rows; | |
8522 | y < yb; | |
8523 | y += row->height, ++row) | |
8524 | blank_row (w, row, y); | |
88f22aff | 8525 | goto finish_scroll_bars; |
8de2d90b JB |
8526 | } |
8527 | } | |
a2889657 | 8528 | |
5f5c8ee5 GM |
8529 | /* Otherwise set up data on this window; select its buffer and point |
8530 | value. */ | |
e481f960 | 8531 | if (update_mode_line) |
5ba50c51 | 8532 | { |
5f5c8ee5 GM |
8533 | /* Really select the buffer, for the sake of buffer-local |
8534 | variables. */ | |
5ba50c51 RS |
8535 | set_buffer_internal_1 (XBUFFER (w->buffer)); |
8536 | really_switched_buffer = 1; | |
8537 | } | |
e481f960 RS |
8538 | else |
8539 | set_buffer_temp (XBUFFER (w->buffer)); | |
5f5c8ee5 GM |
8540 | SET_TEXT_POS (opoint, PT, PT_BYTE); |
8541 | ||
8542 | current_matrix_up_to_date_p | |
8543 | = (!NILP (w->window_end_valid) | |
8544 | && !current_buffer->clip_changed | |
8545 | && XFASTINT (w->last_modified) >= MODIFF | |
8546 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF); | |
e481f960 | 8547 | |
5f5c8ee5 GM |
8548 | /* When windows_or_buffers_changed is non-zero, we can't rely on |
8549 | the window end being valid, so set it to nil there. */ | |
8550 | if (windows_or_buffers_changed) | |
8551 | { | |
8552 | /* If window starts on a continuation line, maybe adjust the | |
8553 | window start in case the window's width changed. */ | |
8554 | if (XMARKER (w->start)->buffer == current_buffer) | |
8555 | compute_window_start_on_continuation_line (w); | |
8556 | ||
8557 | w->window_end_valid = Qnil; | |
8558 | } | |
12adba34 | 8559 | |
5f5c8ee5 GM |
8560 | /* Some sanity checks. */ |
8561 | CHECK_WINDOW_END (w); | |
8562 | if (Z == Z_BYTE && CHARPOS (opoint) != BYTEPOS (opoint)) | |
12adba34 | 8563 | abort (); |
5f5c8ee5 | 8564 | if (BYTEPOS (opoint) < CHARPOS (opoint)) |
12adba34 | 8565 | abort (); |
a2889657 | 8566 | |
28995e67 RS |
8567 | /* If %c is in mode line, update it if needed. */ |
8568 | if (!NILP (w->column_number_displayed) | |
8569 | /* This alternative quickly identifies a common case | |
8570 | where no change is needed. */ | |
8571 | && !(PT == XFASTINT (w->last_point) | |
8850a573 RS |
8572 | && XFASTINT (w->last_modified) >= MODIFF |
8573 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF) | |
28995e67 RS |
8574 | && XFASTINT (w->column_number_displayed) != current_column ()) |
8575 | update_mode_line = 1; | |
8576 | ||
5f5c8ee5 GM |
8577 | /* Count number of windows showing the selected buffer. An indirect |
8578 | buffer counts as its base buffer. */ | |
8579 | if (!just_this_one_p) | |
42640f83 RS |
8580 | { |
8581 | struct buffer *current_base, *window_base; | |
8582 | current_base = current_buffer; | |
8583 | window_base = XBUFFER (XWINDOW (selected_window)->buffer); | |
8584 | if (current_base->base_buffer) | |
8585 | current_base = current_base->base_buffer; | |
8586 | if (window_base->base_buffer) | |
8587 | window_base = window_base->base_buffer; | |
8588 | if (current_base == window_base) | |
8589 | buffer_shared++; | |
8590 | } | |
a2889657 | 8591 | |
5f5c8ee5 GM |
8592 | /* Point refers normally to the selected window. For any other |
8593 | window, set up appropriate value. */ | |
a2889657 JB |
8594 | if (!EQ (window, selected_window)) |
8595 | { | |
12adba34 RS |
8596 | int new_pt = XMARKER (w->pointm)->charpos; |
8597 | int new_pt_byte = marker_byte_position (w->pointm); | |
f67a0f51 | 8598 | if (new_pt < BEGV) |
a2889657 | 8599 | { |
f67a0f51 | 8600 | new_pt = BEGV; |
12adba34 RS |
8601 | new_pt_byte = BEGV_BYTE; |
8602 | set_marker_both (w->pointm, Qnil, BEGV, BEGV_BYTE); | |
a2889657 | 8603 | } |
f67a0f51 | 8604 | else if (new_pt > (ZV - 1)) |
a2889657 | 8605 | { |
f67a0f51 | 8606 | new_pt = ZV; |
12adba34 RS |
8607 | new_pt_byte = ZV_BYTE; |
8608 | set_marker_both (w->pointm, Qnil, ZV, ZV_BYTE); | |
a2889657 | 8609 | } |
5f5c8ee5 | 8610 | |
f67a0f51 | 8611 | /* We don't use SET_PT so that the point-motion hooks don't run. */ |
12adba34 | 8612 | TEMP_SET_PT_BOTH (new_pt, new_pt_byte); |
a2889657 JB |
8613 | } |
8614 | ||
f4faa47c | 8615 | /* If any of the character widths specified in the display table |
5f5c8ee5 GM |
8616 | have changed, invalidate the width run cache. It's true that |
8617 | this may be a bit late to catch such changes, but the rest of | |
f4faa47c JB |
8618 | redisplay goes (non-fatally) haywire when the display table is |
8619 | changed, so why should we worry about doing any better? */ | |
8620 | if (current_buffer->width_run_cache) | |
8621 | { | |
f908610f | 8622 | struct Lisp_Char_Table *disptab = buffer_display_table (); |
f4faa47c JB |
8623 | |
8624 | if (! disptab_matches_widthtab (disptab, | |
8625 | XVECTOR (current_buffer->width_table))) | |
8626 | { | |
8627 | invalidate_region_cache (current_buffer, | |
8628 | current_buffer->width_run_cache, | |
8629 | BEG, Z); | |
8630 | recompute_width_table (current_buffer, disptab); | |
8631 | } | |
8632 | } | |
8633 | ||
a2889657 | 8634 | /* If window-start is screwed up, choose a new one. */ |
a2889657 JB |
8635 | if (XMARKER (w->start)->buffer != current_buffer) |
8636 | goto recenter; | |
8637 | ||
5f5c8ee5 | 8638 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
a2889657 | 8639 | |
cf0df6ab RS |
8640 | /* If someone specified a new starting point but did not insist, |
8641 | check whether it can be used. */ | |
cfad01b4 GM |
8642 | if (!NILP (w->optional_new_start) |
8643 | && CHARPOS (startp) >= BEGV | |
8644 | && CHARPOS (startp) <= ZV) | |
cf0df6ab RS |
8645 | { |
8646 | w->optional_new_start = Qnil; | |
5f5c8ee5 GM |
8647 | /* This takes a mini-buffer prompt into account. */ |
8648 | start_display (&it, w, startp); | |
8649 | move_it_to (&it, PT, 0, it.last_visible_y, -1, | |
8650 | MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y); | |
8651 | if (IT_CHARPOS (it) == PT) | |
cf0df6ab RS |
8652 | w->force_start = Qt; |
8653 | } | |
8654 | ||
8de2d90b | 8655 | /* Handle case where place to start displaying has been specified, |
aa6d10fa | 8656 | unless the specified location is outside the accessible range. */ |
9472f927 GM |
8657 | if (!NILP (w->force_start) |
8658 | || w->frozen_window_start_p) | |
a2889657 | 8659 | { |
e63574d7 | 8660 | w->force_start = Qnil; |
5f5c8ee5 | 8661 | w->vscroll = 0; |
b5174a51 | 8662 | w->window_end_valid = Qnil; |
5f5c8ee5 GM |
8663 | |
8664 | /* Forget any recorded base line for line number display. */ | |
8665 | if (!current_matrix_up_to_date_p | |
8666 | || current_buffer->clip_changed) | |
8667 | w->base_line_number = Qnil; | |
8668 | ||
75c43375 RS |
8669 | /* Redisplay the mode line. Select the buffer properly for that. |
8670 | Also, run the hook window-scroll-functions | |
8671 | because we have scrolled. */ | |
e63574d7 RS |
8672 | /* Note, we do this after clearing force_start because |
8673 | if there's an error, it is better to forget about force_start | |
8674 | than to get into an infinite loop calling the hook functions | |
8675 | and having them get more errors. */ | |
75c43375 RS |
8676 | if (!update_mode_line |
8677 | || ! NILP (Vwindow_scroll_functions)) | |
e481f960 | 8678 | { |
5ba50c51 RS |
8679 | if (!really_switched_buffer) |
8680 | { | |
8681 | set_buffer_temp (old); | |
8682 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 8683 | really_switched_buffer = 1; |
5ba50c51 | 8684 | } |
5f5c8ee5 | 8685 | |
e481f960 RS |
8686 | update_mode_line = 1; |
8687 | w->update_mode_line = Qt; | |
5f5c8ee5 | 8688 | startp = run_window_scroll_functions (window, startp); |
e481f960 | 8689 | } |
5f5c8ee5 | 8690 | |
c2213350 | 8691 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 8692 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 GM |
8693 | if (CHARPOS (startp) < BEGV) |
8694 | SET_TEXT_POS (startp, BEGV, BEGV_BYTE); | |
8695 | else if (CHARPOS (startp) > ZV) | |
8696 | SET_TEXT_POS (startp, ZV, ZV_BYTE); | |
8697 | ||
8698 | /* Redisplay, then check if cursor has been set during the | |
8699 | redisplay. Give up if new fonts were loaded. */ | |
8700 | if (!try_window (window, startp)) | |
8701 | { | |
8702 | w->force_start = Qt; | |
8703 | clear_glyph_matrix (w->desired_matrix); | |
8704 | goto restore_buffers; | |
8705 | } | |
8706 | ||
9472f927 | 8707 | if (w->cursor.vpos < 0 && !w->frozen_window_start_p) |
5f5c8ee5 GM |
8708 | { |
8709 | /* If point does not appear, or on a line that is not fully | |
8710 | visible, move point so it does appear. The desired | |
8711 | matrix has been built above, so we can use it. */ | |
8712 | int height = window_box_height (w) / 2; | |
8713 | struct glyph_row *row = MATRIX_ROW (w->desired_matrix, 0); | |
8714 | ||
8715 | while (row->y < height) | |
8716 | ++row; | |
8717 | ||
8718 | TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row), | |
8719 | MATRIX_ROW_START_BYTEPOS (row)); | |
8720 | ||
90adcf20 | 8721 | if (w != XWINDOW (selected_window)) |
12adba34 | 8722 | set_marker_both (w->pointm, Qnil, PT, PT_BYTE); |
5f5c8ee5 GM |
8723 | else if (current_buffer == old) |
8724 | SET_TEXT_POS (lpoint, PT, PT_BYTE); | |
8725 | ||
8726 | set_cursor_from_row (w, row, w->desired_matrix, 0, 0, 0, 0); | |
8727 | ||
8728 | /* If we are highlighting the region, then we just changed | |
8729 | the region, so redisplay to show it. */ | |
df0b5ea1 RS |
8730 | if (!NILP (Vtransient_mark_mode) |
8731 | && !NILP (current_buffer->mark_active)) | |
6f27fa9b | 8732 | { |
5f5c8ee5 GM |
8733 | clear_glyph_matrix (w->desired_matrix); |
8734 | if (!try_window (window, startp)) | |
8735 | goto restore_buffers; | |
6f27fa9b | 8736 | } |
a2889657 | 8737 | } |
5f5c8ee5 GM |
8738 | |
8739 | make_cursor_line_fully_visible (w); | |
8740 | #if GLYPH_DEBUG | |
8741 | debug_method_add (w, "forced window start"); | |
8742 | #endif | |
a2889657 JB |
8743 | goto done; |
8744 | } | |
8745 | ||
5f5c8ee5 GM |
8746 | /* Handle case where text has not changed, only point, and it has |
8747 | not moved off the frame. */ | |
8748 | if (current_matrix_up_to_date_p | |
8749 | /* Point may be in this window. */ | |
8750 | && PT >= CHARPOS (startp) | |
8751 | /* If we don't check this, we are called to move the cursor in a | |
8752 | horizontally split window with a current matrix that doesn't | |
8753 | fit the display. */ | |
8754 | && !windows_or_buffers_changed | |
8755 | /* Selective display hasn't changed. */ | |
8756 | && !current_buffer->clip_changed | |
b1aa6cb3 RS |
8757 | /* If force-mode-line-update was called, really redisplay; |
8758 | that's how redisplay is forced after e.g. changing | |
8759 | buffer-invisibility-spec. */ | |
632ab665 | 8760 | && NILP (w->update_mode_line) |
5f5c8ee5 GM |
8761 | /* Can't use this case if highlighting a region. When a |
8762 | region exists, cursor movement has to do more than just | |
8763 | set the cursor. */ | |
8764 | && !(!NILP (Vtransient_mark_mode) | |
8765 | && !NILP (current_buffer->mark_active)) | |
bd66d1ba | 8766 | && NILP (w->region_showing) |
8f897821 | 8767 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 GM |
8768 | /* Right after splitting windows, last_point may be nil. */ |
8769 | && INTEGERP (w->last_point) | |
8770 | /* This code is not used for mini-buffer for the sake of the case | |
8771 | of redisplaying to replace an echo area message; since in | |
8772 | that case the mini-buffer contents per se are usually | |
8773 | unchanged. This code is of no real use in the mini-buffer | |
8774 | since the handling of this_line_start_pos, etc., in redisplay | |
8775 | handles the same cases. */ | |
d45de95b | 8776 | && !EQ (window, minibuf_window) |
5f5c8ee5 GM |
8777 | /* When splitting windows or for new windows, it happens that |
8778 | redisplay is called with a nil window_end_vpos or one being | |
8779 | larger than the window. This should really be fixed in | |
8780 | window.c. I don't have this on my list, now, so we do | |
8781 | approximately the same as the old redisplay code. --gerd. */ | |
8782 | && INTEGERP (w->window_end_vpos) | |
8783 | && XFASTINT (w->window_end_vpos) < w->current_matrix->nrows | |
8784 | && (FRAME_WINDOW_P (f) | |
8785 | || !MARKERP (Voverlay_arrow_position) | |
377dbd97 | 8786 | || current_buffer != XMARKER (Voverlay_arrow_position)->buffer)) |
a2889657 | 8787 | { |
5f5c8ee5 GM |
8788 | int this_scroll_margin; |
8789 | struct glyph_row *row; | |
8790 | int scroll_p; | |
a2889657 | 8791 | |
5f5c8ee5 GM |
8792 | #if GLYPH_DEBUG |
8793 | debug_method_add (w, "cursor movement"); | |
8794 | #endif | |
9afd2168 | 8795 | |
5f5c8ee5 GM |
8796 | /* Scroll if point within this distance from the top or bottom |
8797 | of the window. This is a pixel value. */ | |
8798 | this_scroll_margin = max (0, scroll_margin); | |
8799 | this_scroll_margin = min (this_scroll_margin, XFASTINT (w->height) / 4); | |
8800 | this_scroll_margin *= CANON_Y_UNIT (f); | |
8801 | ||
8802 | /* Start with the row the cursor was displayed during the last | |
8803 | not paused redisplay. Give up if that row is not valid. */ | |
8804 | if (w->last_cursor.vpos >= w->current_matrix->nrows) | |
8805 | goto try_to_scroll; | |
8806 | row = MATRIX_ROW (w->current_matrix, w->last_cursor.vpos); | |
8807 | if (row->mode_line_p) | |
8808 | ++row; | |
8809 | if (!row->enabled_p) | |
8810 | goto try_to_scroll; | |
8811 | ||
8812 | scroll_p = 0; | |
8813 | if (PT > XFASTINT (w->last_point)) | |
8814 | { | |
8815 | /* Point has moved forward. */ | |
8816 | int last_y = window_text_bottom_y (w) - this_scroll_margin; | |
8817 | ||
8818 | while ((MATRIX_ROW_END_CHARPOS (row) < PT | |
8819 | /* The end position of a row equals the start | |
8820 | position of the next row. If PT is there, we | |
8821 | would rather display it in the next line, except | |
8822 | when this line ends in ZV. */ | |
8823 | || (MATRIX_ROW_END_CHARPOS (row) == PT | |
8824 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
8825 | || !row->ends_at_zv_p))) | |
8826 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
8827 | { | |
8828 | xassert (row->enabled_p); | |
8829 | ++row; | |
8830 | } | |
9afd2168 | 8831 | |
5f5c8ee5 GM |
8832 | /* If within the scroll margin, scroll. Note that |
8833 | MATRIX_ROW_BOTTOM_Y gives the pixel position at which the | |
8834 | next line would be drawn, and that this_scroll_margin can | |
8835 | be zero. */ | |
8836 | if (MATRIX_ROW_BOTTOM_Y (row) > last_y | |
8837 | || PT > MATRIX_ROW_END_CHARPOS (row) | |
8838 | /* Line is completely visible last line in window and PT | |
8839 | is to be set in the next line. */ | |
8840 | || (MATRIX_ROW_BOTTOM_Y (row) == last_y | |
8841 | && PT == MATRIX_ROW_END_CHARPOS (row) | |
8842 | && !row->ends_at_zv_p | |
8843 | && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row))) | |
8844 | scroll_p = 1; | |
8845 | } | |
8846 | else if (PT < XFASTINT (w->last_point)) | |
a2889657 | 8847 | { |
5f5c8ee5 GM |
8848 | /* Cursor has to be moved backward. Note that PT >= |
8849 | CHARPOS (startp) because of the outer if-statement. */ | |
8850 | while (!row->mode_line_p | |
8851 | && (MATRIX_ROW_START_CHARPOS (row) > PT | |
8852 | || (MATRIX_ROW_START_CHARPOS (row) == PT | |
8853 | && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) | |
8854 | && (row->y > this_scroll_margin | |
8855 | || CHARPOS (startp) == BEGV)) | |
a2889657 | 8856 | { |
5f5c8ee5 GM |
8857 | xassert (row->enabled_p); |
8858 | --row; | |
a2889657 | 8859 | } |
abb4c08f | 8860 | |
5f5c8ee5 GM |
8861 | /* Consider the following case: Window starts at BEGV, there |
8862 | is invisible, intangible text at BEGV, so that display | |
8863 | starts at some point START > BEGV. It can happen that | |
8864 | we are called with PT somewhere between BEGV and START. | |
8865 | Try to handle that case. */ | |
8866 | if (row < w->current_matrix->rows | |
8867 | || row->mode_line_p) | |
8868 | { | |
8869 | row = w->current_matrix->rows; | |
8870 | if (row->mode_line_p) | |
8871 | ++row; | |
8872 | } | |
8873 | ||
8874 | /* Due to newlines in overlay strings, we may have to skip | |
8875 | forward over overlay strings. */ | |
8876 | while (MATRIX_ROW_END_CHARPOS (row) == PT | |
8877 | && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row) | |
8878 | && !row->ends_at_zv_p) | |
8879 | ++row; | |
8880 | ||
8881 | /* If within the scroll margin, scroll. */ | |
8882 | if (row->y < this_scroll_margin | |
8883 | && CHARPOS (startp) != BEGV) | |
8884 | scroll_p = 1; | |
8885 | } | |
8886 | ||
8887 | /* if PT is not in the glyph row, give up. */ | |
8888 | if (PT < MATRIX_ROW_START_CHARPOS (row) | |
8889 | || PT > MATRIX_ROW_END_CHARPOS (row)) | |
8890 | goto try_to_scroll; | |
8891 | ||
8892 | /* If we end up in a partially visible line, let's make it fully | |
8893 | visible. This can be done most easily by using the existing | |
8894 | scrolling code. */ | |
8895 | if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row)) | |
8896 | { | |
8897 | temp_scroll_step = 1; | |
8898 | goto try_to_scroll; | |
a2889657 | 8899 | } |
5f5c8ee5 GM |
8900 | else if (scroll_p) |
8901 | goto try_to_scroll; | |
8902 | ||
8903 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
8904 | goto done; | |
a2889657 | 8905 | } |
5f5c8ee5 | 8906 | |
a2889657 JB |
8907 | /* If current starting point was originally the beginning of a line |
8908 | but no longer is, find a new starting point. */ | |
265a9e55 | 8909 | else if (!NILP (w->start_at_line_beg) |
5f5c8ee5 GM |
8910 | && !(CHARPOS (startp) <= BEGV |
8911 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n')) | |
a2889657 | 8912 | { |
5f5c8ee5 GM |
8913 | #if GLYPH_DEBUG |
8914 | debug_method_add (w, "recenter 1"); | |
8915 | #endif | |
a2889657 JB |
8916 | goto recenter; |
8917 | } | |
5f5c8ee5 GM |
8918 | |
8919 | /* Try scrolling with try_window_id. */ | |
9142dd5b GM |
8920 | else if (/* Windows and buffers haven't changed. */ |
8921 | !windows_or_buffers_changed | |
5f5c8ee5 GM |
8922 | /* Window must be either use window-based redisplay or |
8923 | be full width. */ | |
8924 | && (FRAME_WINDOW_P (f) | |
c59c668a | 8925 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))) |
5f5c8ee5 GM |
8926 | && !MINI_WINDOW_P (w) |
8927 | /* Point is not known NOT to appear in window. */ | |
8928 | && PT >= CHARPOS (startp) | |
a2889657 | 8929 | && XFASTINT (w->last_modified) |
5f5c8ee5 GM |
8930 | /* Window is not hscrolled. */ |
8931 | && XFASTINT (w->hscroll) == 0 | |
8932 | /* Selective display has not changed. */ | |
8933 | && !current_buffer->clip_changed | |
8934 | /* Current matrix is up to date. */ | |
8935 | && !NILP (w->window_end_valid) | |
8936 | /* Can't use this case if highlighting a region because | |
8937 | a cursor movement will do more than just set the cursor. */ | |
bd66d1ba RS |
8938 | && !(!NILP (Vtransient_mark_mode) |
8939 | && !NILP (current_buffer->mark_active)) | |
8940 | && NILP (w->region_showing) | |
8f897821 | 8941 | && NILP (Vshow_trailing_whitespace) |
5f5c8ee5 | 8942 | /* Overlay arrow position and string not changed. */ |
d45de95b | 8943 | && EQ (last_arrow_position, COERCE_MARKER (Voverlay_arrow_position)) |
a2889657 | 8944 | && EQ (last_arrow_string, Voverlay_arrow_string) |
5f5c8ee5 GM |
8945 | /* Value is > 0 if update has been done, it is -1 if we |
8946 | know that the same window start will not work. It is 0 | |
8947 | if unsuccessful for some other reason. */ | |
8948 | && (tem = try_window_id (w)) != 0) | |
a2889657 | 8949 | { |
5f5c8ee5 GM |
8950 | #if GLYPH_DEBUG |
8951 | debug_method_add (w, "try_window_id"); | |
8952 | #endif | |
8953 | ||
8954 | if (fonts_changed_p) | |
8955 | goto restore_buffers; | |
a2889657 JB |
8956 | if (tem > 0) |
8957 | goto done; | |
5f5c8ee5 GM |
8958 | /* Otherwise try_window_id has returned -1 which means that we |
8959 | don't want the alternative below this comment to execute. */ | |
a2889657 | 8960 | } |
5f5c8ee5 GM |
8961 | else if (CHARPOS (startp) >= BEGV |
8962 | && CHARPOS (startp) <= ZV | |
8963 | && PT >= CHARPOS (startp) | |
8964 | && (CHARPOS (startp) < ZV | |
e9874cee | 8965 | /* Avoid starting at end of buffer. */ |
5f5c8ee5 | 8966 | || CHARPOS (startp) == BEGV |
8850a573 RS |
8967 | || (XFASTINT (w->last_modified) >= MODIFF |
8968 | && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF))) | |
a2889657 | 8969 | { |
5f5c8ee5 GM |
8970 | #if GLYPH_DEBUG |
8971 | debug_method_add (w, "same window start"); | |
8972 | #endif | |
8973 | ||
8974 | /* Try to redisplay starting at same place as before. | |
8975 | If point has not moved off frame, accept the results. */ | |
8976 | if (!current_matrix_up_to_date_p | |
8977 | /* Don't use try_window_reusing_current_matrix in this case | |
8978 | because it can have changed the buffer. */ | |
8979 | || !NILP (Vwindow_scroll_functions) | |
8980 | || MINI_WINDOW_P (w) | |
8981 | || !try_window_reusing_current_matrix (w)) | |
8982 | { | |
8983 | IF_DEBUG (debug_method_add (w, "1")); | |
8984 | try_window (window, startp); | |
8985 | } | |
8986 | ||
8987 | if (fonts_changed_p) | |
8988 | goto restore_buffers; | |
8989 | ||
8990 | if (w->cursor.vpos >= 0) | |
aa6d10fa | 8991 | { |
5f5c8ee5 GM |
8992 | if (!just_this_one_p |
8993 | || current_buffer->clip_changed | |
9142dd5b | 8994 | || BEG_UNCHANGED < CHARPOS (startp)) |
aa6d10fa RS |
8995 | /* Forget any recorded base line for line number display. */ |
8996 | w->base_line_number = Qnil; | |
5f5c8ee5 GM |
8997 | |
8998 | make_cursor_line_fully_visible (w); | |
aa6d10fa RS |
8999 | goto done; |
9000 | } | |
a2889657 | 9001 | else |
5f5c8ee5 | 9002 | clear_glyph_matrix (w->desired_matrix); |
a2889657 JB |
9003 | } |
9004 | ||
5f5c8ee5 GM |
9005 | try_to_scroll: |
9006 | ||
c2213350 | 9007 | XSETFASTINT (w->last_modified, 0); |
8850a573 | 9008 | XSETFASTINT (w->last_overlay_modified, 0); |
5f5c8ee5 | 9009 | |
e481f960 RS |
9010 | /* Redisplay the mode line. Select the buffer properly for that. */ |
9011 | if (!update_mode_line) | |
9012 | { | |
5ba50c51 RS |
9013 | if (!really_switched_buffer) |
9014 | { | |
9015 | set_buffer_temp (old); | |
9016 | set_buffer_internal_1 (XBUFFER (w->buffer)); | |
5f5c8ee5 | 9017 | really_switched_buffer = 1; |
5ba50c51 | 9018 | } |
e481f960 RS |
9019 | update_mode_line = 1; |
9020 | w->update_mode_line = Qt; | |
9021 | } | |
a2889657 | 9022 | |
5f5c8ee5 GM |
9023 | /* Try to scroll by specified few lines. */ |
9024 | if ((scroll_conservatively | |
9025 | || scroll_step | |
9026 | || temp_scroll_step | |
9027 | || NUMBERP (current_buffer->scroll_up_aggressively) | |
9028 | || NUMBERP (current_buffer->scroll_down_aggressively)) | |
09cacf9c | 9029 | && !current_buffer->clip_changed |
5f5c8ee5 GM |
9030 | && CHARPOS (startp) >= BEGV |
9031 | && CHARPOS (startp) <= ZV) | |
0789adb2 | 9032 | { |
5f5c8ee5 GM |
9033 | /* The function returns -1 if new fonts were loaded, 1 if |
9034 | successful, 0 if not successful. */ | |
9035 | int rc = try_scrolling (window, just_this_one_p, | |
9036 | scroll_conservatively, | |
9037 | scroll_step, | |
9038 | temp_scroll_step); | |
9039 | if (rc > 0) | |
9040 | goto done; | |
9041 | else if (rc < 0) | |
9042 | goto restore_buffers; | |
9043 | } | |
f9c8af06 | 9044 | |
5f5c8ee5 | 9045 | /* Finally, just choose place to start which centers point */ |
5936754e | 9046 | |
5f5c8ee5 | 9047 | recenter: |
44173109 | 9048 | |
5f5c8ee5 GM |
9049 | #if GLYPH_DEBUG |
9050 | debug_method_add (w, "recenter"); | |
9051 | #endif | |
0789adb2 | 9052 | |
5f5c8ee5 | 9053 | /* w->vscroll = 0; */ |
0789adb2 | 9054 | |
5f5c8ee5 GM |
9055 | /* Forget any previously recorded base line for line number display. */ |
9056 | if (!current_matrix_up_to_date_p | |
9057 | || current_buffer->clip_changed) | |
9058 | w->base_line_number = Qnil; | |
9059 | ||
9060 | /* Move backward half the height of the window. */ | |
9061 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
9062 | it.current_y = it.last_visible_y; | |
9063 | move_it_vertically_backward (&it, it.last_visible_y / 2); | |
9064 | xassert (IT_CHARPOS (it) >= BEGV); | |
9065 | ||
9066 | /* The function move_it_vertically_backward may move over more | |
9067 | than the specified y-distance. If it->w is small, e.g. a | |
9068 | mini-buffer window, we may end up in front of the window's | |
9069 | display area. Start displaying at the start of the line | |
9070 | containing PT in this case. */ | |
9071 | if (it.current_y <= 0) | |
9072 | { | |
9073 | init_iterator (&it, w, PT, PT_BYTE, NULL, DEFAULT_FACE_ID); | |
9074 | move_it_vertically (&it, 0); | |
9075 | xassert (IT_CHARPOS (it) <= PT); | |
9076 | it.current_y = 0; | |
0789adb2 RS |
9077 | } |
9078 | ||
5f5c8ee5 GM |
9079 | it.current_x = it.hpos = 0; |
9080 | ||
9081 | /* Set startp here explicitly in case that helps avoid an infinite loop | |
9082 | in case the window-scroll-functions functions get errors. */ | |
9083 | set_marker_both (w->start, Qnil, IT_CHARPOS (it), IT_BYTEPOS (it)); | |
9084 | ||
9085 | /* Run scroll hooks. */ | |
9086 | startp = run_window_scroll_functions (window, it.current.pos); | |
9087 | ||
9088 | /* Redisplay the window. */ | |
9089 | if (!current_matrix_up_to_date_p | |
9090 | || windows_or_buffers_changed | |
9091 | /* Don't use try_window_reusing_current_matrix in this case | |
9092 | because it can have changed the buffer. */ | |
9093 | || !NILP (Vwindow_scroll_functions) | |
9094 | || !just_this_one_p | |
9095 | || MINI_WINDOW_P (w) | |
9096 | || !try_window_reusing_current_matrix (w)) | |
9097 | try_window (window, startp); | |
9098 | ||
9099 | /* If new fonts have been loaded (due to fontsets), give up. We | |
9100 | have to start a new redisplay since we need to re-adjust glyph | |
9101 | matrices. */ | |
9102 | if (fonts_changed_p) | |
9103 | goto restore_buffers; | |
9104 | ||
9105 | /* If cursor did not appear assume that the middle of the window is | |
9106 | in the first line of the window. Do it again with the next line. | |
9107 | (Imagine a window of height 100, displaying two lines of height | |
9108 | 60. Moving back 50 from it->last_visible_y will end in the first | |
9109 | line.) */ | |
9110 | if (w->cursor.vpos < 0) | |
a2889657 | 9111 | { |
5f5c8ee5 GM |
9112 | if (!NILP (w->window_end_valid) |
9113 | && PT >= Z - XFASTINT (w->window_end_pos)) | |
a2889657 | 9114 | { |
5f5c8ee5 GM |
9115 | clear_glyph_matrix (w->desired_matrix); |
9116 | move_it_by_lines (&it, 1, 0); | |
9117 | try_window (window, it.current.pos); | |
a2889657 | 9118 | } |
5f5c8ee5 | 9119 | else if (PT < IT_CHARPOS (it)) |
a2889657 | 9120 | { |
5f5c8ee5 GM |
9121 | clear_glyph_matrix (w->desired_matrix); |
9122 | move_it_by_lines (&it, -1, 0); | |
9123 | try_window (window, it.current.pos); | |
9124 | } | |
9125 | else | |
9126 | { | |
9127 | /* Not much we can do about it. */ | |
a2889657 | 9128 | } |
a2889657 | 9129 | } |
010494d0 | 9130 | |
5f5c8ee5 GM |
9131 | /* Consider the following case: Window starts at BEGV, there is |
9132 | invisible, intangible text at BEGV, so that display starts at | |
9133 | some point START > BEGV. It can happen that we are called with | |
9134 | PT somewhere between BEGV and START. Try to handle that case. */ | |
9135 | if (w->cursor.vpos < 0) | |
835766b6 | 9136 | { |
5f5c8ee5 GM |
9137 | struct glyph_row *row = w->current_matrix->rows; |
9138 | if (row->mode_line_p) | |
9139 | ++row; | |
9140 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); | |
835766b6 | 9141 | } |
5f5c8ee5 GM |
9142 | |
9143 | make_cursor_line_fully_visible (w); | |
b5174a51 | 9144 | |
74d481ac GM |
9145 | done: |
9146 | ||
5f5c8ee5 GM |
9147 | SET_TEXT_POS_FROM_MARKER (startp, w->start); |
9148 | w->start_at_line_beg = ((CHARPOS (startp) == BEGV | |
9149 | || FETCH_BYTE (BYTEPOS (startp) - 1) == '\n') | |
9150 | ? Qt : Qnil); | |
a2889657 | 9151 | |
5f5c8ee5 | 9152 | /* Display the mode line, if we must. */ |
e481f960 | 9153 | if ((update_mode_line |
aa6d10fa | 9154 | /* If window not full width, must redo its mode line |
5f5c8ee5 GM |
9155 | if (a) the window to its side is being redone and |
9156 | (b) we do a frame-based redisplay. This is a consequence | |
9157 | of how inverted lines are drawn in frame-based redisplay. */ | |
9158 | || (!just_this_one_p | |
9159 | && !FRAME_WINDOW_P (f) | |
9160 | && !WINDOW_FULL_WIDTH_P (w)) | |
9161 | /* Line number to display. */ | |
155ef550 | 9162 | || INTEGERP (w->base_line_pos) |
5f5c8ee5 | 9163 | /* Column number is displayed and different from the one displayed. */ |
155ef550 KH |
9164 | || (!NILP (w->column_number_displayed) |
9165 | && XFASTINT (w->column_number_displayed) != current_column ())) | |
5f5c8ee5 GM |
9166 | /* This means that the window has a mode line. */ |
9167 | && (WINDOW_WANTS_MODELINE_P (w) | |
045dee35 | 9168 | || WINDOW_WANTS_HEADER_LINE_P (w))) |
5ba50c51 | 9169 | { |
5f5c8ee5 GM |
9170 | display_mode_lines (w); |
9171 | ||
9172 | /* If mode line height has changed, arrange for a thorough | |
9173 | immediate redisplay using the correct mode line height. */ | |
9174 | if (WINDOW_WANTS_MODELINE_P (w) | |
9175 | && CURRENT_MODE_LINE_HEIGHT (w) != DESIRED_MODE_LINE_HEIGHT (w)) | |
5ba50c51 | 9176 | { |
5f5c8ee5 GM |
9177 | fonts_changed_p = 1; |
9178 | MATRIX_MODE_LINE_ROW (w->current_matrix)->height | |
9179 | = DESIRED_MODE_LINE_HEIGHT (w); | |
5ba50c51 | 9180 | } |
5f5c8ee5 GM |
9181 | |
9182 | /* If top line height has changed, arrange for a thorough | |
9183 | immediate redisplay using the correct mode line height. */ | |
045dee35 GM |
9184 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9185 | && CURRENT_HEADER_LINE_HEIGHT (w) != DESIRED_HEADER_LINE_HEIGHT (w)) | |
5f5c8ee5 GM |
9186 | { |
9187 | fonts_changed_p = 1; | |
045dee35 GM |
9188 | MATRIX_HEADER_LINE_ROW (w->current_matrix)->height |
9189 | = DESIRED_HEADER_LINE_HEIGHT (w); | |
5f5c8ee5 GM |
9190 | } |
9191 | ||
9192 | if (fonts_changed_p) | |
9193 | goto restore_buffers; | |
5ba50c51 | 9194 | } |
5f5c8ee5 GM |
9195 | |
9196 | if (!line_number_displayed | |
9197 | && !BUFFERP (w->base_line_pos)) | |
aa6d10fa RS |
9198 | { |
9199 | w->base_line_pos = Qnil; | |
9200 | w->base_line_number = Qnil; | |
9201 | } | |
a2889657 | 9202 | |
5f5c8ee5 GM |
9203 | finish_menu_bars: |
9204 | ||
7ce2c095 | 9205 | /* When we reach a frame's selected window, redo the frame's menu bar. */ |
e481f960 | 9206 | if (update_mode_line |
5f5c8ee5 GM |
9207 | && EQ (FRAME_SELECTED_WINDOW (f), window)) |
9208 | { | |
9209 | int redisplay_menu_p = 0; | |
9210 | ||
9211 | if (FRAME_WINDOW_P (f)) | |
9212 | { | |
dc937613 | 9213 | #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) |
5f5c8ee5 | 9214 | redisplay_menu_p = FRAME_EXTERNAL_MENU_BAR (f); |
76412d64 | 9215 | #else |
5f5c8ee5 | 9216 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; |
76412d64 | 9217 | #endif |
5f5c8ee5 GM |
9218 | } |
9219 | else | |
9220 | redisplay_menu_p = FRAME_MENU_BAR_LINES (f) > 0; | |
9221 | ||
9222 | if (redisplay_menu_p) | |
9223 | display_menu_bar (w); | |
9224 | ||
9225 | #ifdef HAVE_WINDOW_SYSTEM | |
e037b9ec GM |
9226 | if (WINDOWP (f->tool_bar_window) |
9227 | && (FRAME_TOOL_BAR_LINES (f) > 0 | |
9228 | || auto_resize_tool_bars_p)) | |
9229 | redisplay_tool_bar (f); | |
5f5c8ee5 GM |
9230 | #endif |
9231 | } | |
7ce2c095 | 9232 | |
88f22aff | 9233 | finish_scroll_bars: |
5f5c8ee5 | 9234 | |
88f22aff | 9235 | if (FRAME_HAS_VERTICAL_SCROLL_BARS (f)) |
30c566e4 | 9236 | { |
b1d1124b | 9237 | int start, end, whole; |
30c566e4 | 9238 | |
b1d1124b | 9239 | /* Calculate the start and end positions for the current window. |
3505ea70 JB |
9240 | At some point, it would be nice to choose between scrollbars |
9241 | which reflect the whole buffer size, with special markers | |
9242 | indicating narrowing, and scrollbars which reflect only the | |
9243 | visible region. | |
9244 | ||
5f5c8ee5 | 9245 | Note that mini-buffers sometimes aren't displaying any text. */ |
c6e89d6c | 9246 | if (!MINI_WINDOW_P (w) |
5f5c8ee5 | 9247 | || (w == XWINDOW (minibuf_window) |
c6e89d6c | 9248 | && NILP (echo_area_buffer[0]))) |
b1d1124b | 9249 | { |
8a9311d7 | 9250 | whole = ZV - BEGV; |
4d641a15 | 9251 | start = marker_position (w->start) - BEGV; |
b1d1124b JB |
9252 | /* I don't think this is guaranteed to be right. For the |
9253 | moment, we'll pretend it is. */ | |
5f5c8ee5 | 9254 | end = (Z - XFASTINT (w->window_end_pos)) - BEGV; |
3505ea70 | 9255 | |
5f5c8ee5 GM |
9256 | if (end < start) |
9257 | end = start; | |
9258 | if (whole < (end - start)) | |
9259 | whole = end - start; | |
b1d1124b JB |
9260 | } |
9261 | else | |
9262 | start = end = whole = 0; | |
30c566e4 | 9263 | |
88f22aff | 9264 | /* Indicate what this scroll bar ought to be displaying now. */ |
7eb9ba41 | 9265 | (*set_vertical_scroll_bar_hook) (w, end - start, whole, start); |
30c566e4 | 9266 | |
5f5c8ee5 GM |
9267 | /* Note that we actually used the scroll bar attached to this |
9268 | window, so it shouldn't be deleted at the end of redisplay. */ | |
88f22aff | 9269 | (*redeem_scroll_bar_hook) (w); |
30c566e4 | 9270 | } |
b1d1124b | 9271 | |
5f5c8ee5 GM |
9272 | restore_buffers: |
9273 | ||
9274 | /* Restore current_buffer and value of point in it. */ | |
9275 | TEMP_SET_PT_BOTH (CHARPOS (opoint), BYTEPOS (opoint)); | |
5ba50c51 | 9276 | if (really_switched_buffer) |
f72df6ac | 9277 | set_buffer_internal_1 (old); |
e481f960 RS |
9278 | else |
9279 | set_buffer_temp (old); | |
5f5c8ee5 | 9280 | TEMP_SET_PT_BOTH (CHARPOS (lpoint), BYTEPOS (lpoint)); |
2e54982e RS |
9281 | |
9282 | unbind_to (count, Qnil); | |
a2889657 | 9283 | } |
a2889657 | 9284 | |
5f5c8ee5 GM |
9285 | |
9286 | /* Build the complete desired matrix of WINDOW with a window start | |
9287 | buffer position POS. Value is non-zero if successful. It is zero | |
9288 | if fonts were loaded during redisplay which makes re-adjusting | |
9289 | glyph matrices necessary. */ | |
9290 | ||
9291 | int | |
a2889657 JB |
9292 | try_window (window, pos) |
9293 | Lisp_Object window; | |
5f5c8ee5 GM |
9294 | struct text_pos pos; |
9295 | { | |
9296 | struct window *w = XWINDOW (window); | |
9297 | struct it it; | |
9298 | struct glyph_row *last_text_row = NULL; | |
9cbab4ff | 9299 | |
5f5c8ee5 GM |
9300 | /* Make POS the new window start. */ |
9301 | set_marker_both (w->start, Qnil, CHARPOS (pos), BYTEPOS (pos)); | |
12adba34 | 9302 | |
5f5c8ee5 GM |
9303 | /* Mark cursor position as unknown. No overlay arrow seen. */ |
9304 | w->cursor.vpos = -1; | |
a2889657 | 9305 | overlay_arrow_seen = 0; |
642eefc6 | 9306 | |
5f5c8ee5 GM |
9307 | /* Initialize iterator and info to start at POS. */ |
9308 | start_display (&it, w, pos); | |
a2889657 | 9309 | |
5f5c8ee5 GM |
9310 | /* Display all lines of W. */ |
9311 | while (it.current_y < it.last_visible_y) | |
9312 | { | |
9313 | if (display_line (&it)) | |
9314 | last_text_row = it.glyph_row - 1; | |
9315 | if (fonts_changed_p) | |
9316 | return 0; | |
9317 | } | |
a2889657 | 9318 | |
5f5c8ee5 GM |
9319 | /* If bottom moved off end of frame, change mode line percentage. */ |
9320 | if (XFASTINT (w->window_end_pos) <= 0 | |
9321 | && Z != IT_CHARPOS (it)) | |
a2889657 JB |
9322 | w->update_mode_line = Qt; |
9323 | ||
5f5c8ee5 GM |
9324 | /* Set window_end_pos to the offset of the last character displayed |
9325 | on the window from the end of current_buffer. Set | |
9326 | window_end_vpos to its row number. */ | |
9327 | if (last_text_row) | |
9328 | { | |
9329 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row)); | |
9330 | w->window_end_bytepos | |
9331 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9332 | XSETFASTINT (w->window_end_pos, | |
9333 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9334 | XSETFASTINT (w->window_end_vpos, | |
9335 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9336 | xassert (MATRIX_ROW (w->desired_matrix, XFASTINT (w->window_end_vpos)) | |
9337 | ->displays_text_p); | |
9338 | } | |
9339 | else | |
9340 | { | |
9341 | w->window_end_bytepos = 0; | |
9342 | XSETFASTINT (w->window_end_pos, 0); | |
9343 | XSETFASTINT (w->window_end_vpos, 0); | |
9344 | } | |
9345 | ||
a2889657 JB |
9346 | /* But that is not valid info until redisplay finishes. */ |
9347 | w->window_end_valid = Qnil; | |
5f5c8ee5 | 9348 | return 1; |
a2889657 | 9349 | } |
5f5c8ee5 GM |
9350 | |
9351 | ||
a2889657 | 9352 | \f |
5f5c8ee5 GM |
9353 | /************************************************************************ |
9354 | Window redisplay reusing current matrix when buffer has not changed | |
9355 | ************************************************************************/ | |
9356 | ||
9357 | /* Try redisplay of window W showing an unchanged buffer with a | |
9358 | different window start than the last time it was displayed by | |
9359 | reusing its current matrix. Value is non-zero if successful. | |
9360 | W->start is the new window start. */ | |
a2889657 JB |
9361 | |
9362 | static int | |
5f5c8ee5 GM |
9363 | try_window_reusing_current_matrix (w) |
9364 | struct window *w; | |
a2889657 | 9365 | { |
5f5c8ee5 GM |
9366 | struct frame *f = XFRAME (w->frame); |
9367 | struct glyph_row *row, *bottom_row; | |
9368 | struct it it; | |
9369 | struct run run; | |
9370 | struct text_pos start, new_start; | |
9371 | int nrows_scrolled, i; | |
9372 | struct glyph_row *last_text_row; | |
9373 | struct glyph_row *last_reused_text_row; | |
9374 | struct glyph_row *start_row; | |
9375 | int start_vpos, min_y, max_y; | |
9376 | ||
9377 | /* Right now this function doesn't handle terminal frames. */ | |
9378 | if (!FRAME_WINDOW_P (f)) | |
9379 | return 0; | |
a2889657 | 9380 | |
5f5c8ee5 GM |
9381 | /* Can't do this if region may have changed. */ |
9382 | if ((!NILP (Vtransient_mark_mode) | |
9383 | && !NILP (current_buffer->mark_active)) | |
8f897821 GM |
9384 | || !NILP (w->region_showing) |
9385 | || !NILP (Vshow_trailing_whitespace)) | |
5f5c8ee5 | 9386 | return 0; |
a2889657 | 9387 | |
5f5c8ee5 | 9388 | /* If top-line visibility has changed, give up. */ |
045dee35 GM |
9389 | if (WINDOW_WANTS_HEADER_LINE_P (w) |
9390 | != MATRIX_HEADER_LINE_ROW (w->current_matrix)->mode_line_p) | |
5f5c8ee5 GM |
9391 | return 0; |
9392 | ||
9393 | /* Give up if old or new display is scrolled vertically. We could | |
9394 | make this function handle this, but right now it doesn't. */ | |
9395 | start_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9396 | if (w->vscroll || MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row)) | |
9397 | return 0; | |
9398 | ||
9399 | /* The variable new_start now holds the new window start. The old | |
9400 | start `start' can be determined from the current matrix. */ | |
9401 | SET_TEXT_POS_FROM_MARKER (new_start, w->start); | |
9402 | start = start_row->start.pos; | |
9403 | start_vpos = MATRIX_ROW_VPOS (start_row, w->current_matrix); | |
a2889657 | 9404 | |
5f5c8ee5 GM |
9405 | /* Clear the desired matrix for the display below. */ |
9406 | clear_glyph_matrix (w->desired_matrix); | |
9407 | ||
9408 | if (CHARPOS (new_start) <= CHARPOS (start)) | |
9409 | { | |
9410 | int first_row_y; | |
9411 | ||
9412 | IF_DEBUG (debug_method_add (w, "twu1")); | |
9413 | ||
9414 | /* Display up to a row that can be reused. The variable | |
9415 | last_text_row is set to the last row displayed that displays | |
9416 | text. */ | |
9417 | start_display (&it, w, new_start); | |
9418 | first_row_y = it.current_y; | |
9419 | w->cursor.vpos = -1; | |
9420 | last_text_row = last_reused_text_row = NULL; | |
9421 | while (it.current_y < it.last_visible_y | |
9422 | && IT_CHARPOS (it) < CHARPOS (start) | |
9423 | && !fonts_changed_p) | |
9424 | if (display_line (&it)) | |
9425 | last_text_row = it.glyph_row - 1; | |
9426 | ||
9427 | /* A value of current_y < last_visible_y means that we stopped | |
9428 | at the previous window start, which in turn means that we | |
9429 | have at least one reusable row. */ | |
9430 | if (it.current_y < it.last_visible_y) | |
a2889657 | 9431 | { |
5f5c8ee5 GM |
9432 | nrows_scrolled = it.vpos; |
9433 | ||
9434 | /* Find PT if not already found in the lines displayed. */ | |
9435 | if (w->cursor.vpos < 0) | |
a2889657 | 9436 | { |
5f5c8ee5 GM |
9437 | int dy = it.current_y - first_row_y; |
9438 | ||
9439 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9440 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9441 | { | |
9442 | if (PT >= MATRIX_ROW_START_CHARPOS (row) | |
9443 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
9444 | { | |
9445 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, | |
9446 | dy, nrows_scrolled); | |
9447 | break; | |
9448 | } | |
9449 | ||
9450 | if (MATRIX_ROW_BOTTOM_Y (row) + dy >= it.last_visible_y) | |
9451 | break; | |
9452 | ||
9453 | ++row; | |
9454 | } | |
9455 | ||
9456 | /* Give up if point was not found. This shouldn't | |
9457 | happen often; not more often than with try_window | |
9458 | itself. */ | |
9459 | if (w->cursor.vpos < 0) | |
9460 | { | |
9461 | clear_glyph_matrix (w->desired_matrix); | |
9462 | return 0; | |
9463 | } | |
a2889657 | 9464 | } |
5f5c8ee5 GM |
9465 | |
9466 | /* Scroll the display. Do it before the current matrix is | |
9467 | changed. The problem here is that update has not yet | |
9468 | run, i.e. part of the current matrix is not up to date. | |
9469 | scroll_run_hook will clear the cursor, and use the | |
9470 | current matrix to get the height of the row the cursor is | |
9471 | in. */ | |
9472 | run.current_y = first_row_y; | |
9473 | run.desired_y = it.current_y; | |
9474 | run.height = it.last_visible_y - it.current_y; | |
9475 | if (run.height > 0) | |
a2889657 | 9476 | { |
5f5c8ee5 GM |
9477 | update_begin (f); |
9478 | rif->update_window_begin_hook (w); | |
9479 | rif->scroll_run_hook (w, &run); | |
9480 | rif->update_window_end_hook (w, 0); | |
9481 | update_end (f); | |
a2889657 | 9482 | } |
5f5c8ee5 GM |
9483 | |
9484 | /* Shift current matrix down by nrows_scrolled lines. */ | |
9485 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9486 | rotate_matrix (w->current_matrix, | |
9487 | start_vpos, | |
9488 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9489 | nrows_scrolled); | |
9490 | ||
9491 | /* Disable lines not reused. */ | |
9492 | for (i = 0; i < it.vpos; ++i) | |
9493 | MATRIX_ROW (w->current_matrix, i)->enabled_p = 0; | |
9494 | ||
9495 | /* Re-compute Y positions. */ | |
9496 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix) + nrows_scrolled; | |
045dee35 | 9497 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9498 | max_y = it.last_visible_y; |
9499 | while (row < bottom_row) | |
d2f84654 | 9500 | { |
5f5c8ee5 GM |
9501 | row->y = it.current_y; |
9502 | ||
9503 | if (row->y < min_y) | |
9504 | row->visible_height = row->height - (min_y - row->y); | |
9505 | else if (row->y + row->height > max_y) | |
9506 | row->visible_height | |
9507 | = row->height - (row->y + row->height - max_y); | |
9508 | else | |
9509 | row->visible_height = row->height; | |
9510 | ||
9511 | it.current_y += row->height; | |
9512 | ++it.vpos; | |
9513 | ||
9514 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9515 | last_reused_text_row = row; | |
9516 | if (MATRIX_ROW_BOTTOM_Y (row) >= it.last_visible_y) | |
9517 | break; | |
9518 | ++row; | |
d2f84654 | 9519 | } |
a2889657 | 9520 | } |
5f5c8ee5 GM |
9521 | |
9522 | /* Update window_end_pos etc.; last_reused_text_row is the last | |
9523 | reused row from the current matrix containing text, if any. | |
9524 | The value of last_text_row is the last displayed line | |
9525 | containing text. */ | |
9526 | if (last_reused_text_row) | |
a2889657 | 9527 | { |
5f5c8ee5 GM |
9528 | w->window_end_bytepos |
9529 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_reused_text_row); | |
9530 | XSETFASTINT (w->window_end_pos, | |
9531 | Z - MATRIX_ROW_END_CHARPOS (last_reused_text_row)); | |
9532 | XSETFASTINT (w->window_end_vpos, | |
9533 | MATRIX_ROW_VPOS (last_reused_text_row, | |
9534 | w->current_matrix)); | |
a2889657 | 9535 | } |
5f5c8ee5 GM |
9536 | else if (last_text_row) |
9537 | { | |
9538 | w->window_end_bytepos | |
9539 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9540 | XSETFASTINT (w->window_end_pos, | |
9541 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9542 | XSETFASTINT (w->window_end_vpos, | |
9543 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9544 | } | |
9545 | else | |
9546 | { | |
9547 | /* This window must be completely empty. */ | |
9548 | w->window_end_bytepos = 0; | |
9549 | XSETFASTINT (w->window_end_pos, 0); | |
9550 | XSETFASTINT (w->window_end_vpos, 0); | |
9551 | } | |
9552 | w->window_end_valid = Qnil; | |
a2889657 | 9553 | |
5f5c8ee5 GM |
9554 | /* Update hint: don't try scrolling again in update_window. */ |
9555 | w->desired_matrix->no_scrolling_p = 1; | |
9556 | ||
9557 | #if GLYPH_DEBUG | |
9558 | debug_method_add (w, "try_window_reusing_current_matrix 1"); | |
9559 | #endif | |
9560 | return 1; | |
a2889657 | 9561 | } |
5f5c8ee5 GM |
9562 | else if (CHARPOS (new_start) > CHARPOS (start)) |
9563 | { | |
9564 | struct glyph_row *pt_row, *row; | |
9565 | struct glyph_row *first_reusable_row; | |
9566 | struct glyph_row *first_row_to_display; | |
9567 | int dy; | |
9568 | int yb = window_text_bottom_y (w); | |
9569 | ||
9570 | IF_DEBUG (debug_method_add (w, "twu2")); | |
9571 | ||
9572 | /* Find the row starting at new_start, if there is one. Don't | |
9573 | reuse a partially visible line at the end. */ | |
9574 | first_reusable_row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9575 | while (first_reusable_row->enabled_p | |
9576 | && MATRIX_ROW_BOTTOM_Y (first_reusable_row) < yb | |
9577 | && (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9578 | < CHARPOS (new_start))) | |
9579 | ++first_reusable_row; | |
9580 | ||
9581 | /* Give up if there is no row to reuse. */ | |
9582 | if (MATRIX_ROW_BOTTOM_Y (first_reusable_row) >= yb | |
28514cd9 GM |
9583 | || !first_reusable_row->enabled_p |
9584 | || (MATRIX_ROW_START_CHARPOS (first_reusable_row) | |
9585 | != CHARPOS (new_start))) | |
5f5c8ee5 GM |
9586 | return 0; |
9587 | ||
5f5c8ee5 GM |
9588 | /* We can reuse fully visible rows beginning with |
9589 | first_reusable_row to the end of the window. Set | |
9590 | first_row_to_display to the first row that cannot be reused. | |
9591 | Set pt_row to the row containing point, if there is any. */ | |
9592 | first_row_to_display = first_reusable_row; | |
9593 | pt_row = NULL; | |
9594 | while (MATRIX_ROW_BOTTOM_Y (first_row_to_display) < yb) | |
9595 | { | |
9596 | if (PT >= MATRIX_ROW_START_CHARPOS (first_row_to_display) | |
9597 | && PT < MATRIX_ROW_END_CHARPOS (first_row_to_display)) | |
9598 | pt_row = first_row_to_display; | |
a2889657 | 9599 | |
5f5c8ee5 GM |
9600 | ++first_row_to_display; |
9601 | } | |
a2889657 | 9602 | |
5f5c8ee5 GM |
9603 | /* Start displaying at the start of first_row_to_display. */ |
9604 | xassert (first_row_to_display->y < yb); | |
9605 | init_to_row_start (&it, w, first_row_to_display); | |
9606 | nrows_scrolled = MATRIX_ROW_VPOS (first_reusable_row, w->current_matrix); | |
9607 | it.vpos = (MATRIX_ROW_VPOS (first_row_to_display, w->current_matrix) | |
9608 | - nrows_scrolled); | |
9609 | it.current_y = first_row_to_display->y - first_reusable_row->y; | |
9610 | ||
9611 | /* Display lines beginning with first_row_to_display in the | |
9612 | desired matrix. Set last_text_row to the last row displayed | |
9613 | that displays text. */ | |
9614 | it.glyph_row = MATRIX_ROW (w->desired_matrix, it.vpos); | |
9615 | if (pt_row == NULL) | |
9616 | w->cursor.vpos = -1; | |
9617 | last_text_row = NULL; | |
9618 | while (it.current_y < it.last_visible_y && !fonts_changed_p) | |
9619 | if (display_line (&it)) | |
9620 | last_text_row = it.glyph_row - 1; | |
9621 | ||
9622 | /* Give up If point isn't in a row displayed or reused. */ | |
9623 | if (w->cursor.vpos < 0) | |
9624 | { | |
9625 | clear_glyph_matrix (w->desired_matrix); | |
9626 | return 0; | |
9627 | } | |
12adba34 | 9628 | |
5f5c8ee5 GM |
9629 | /* If point is in a reused row, adjust y and vpos of the cursor |
9630 | position. */ | |
9631 | if (pt_row) | |
9632 | { | |
9633 | w->cursor.vpos -= MATRIX_ROW_VPOS (first_reusable_row, | |
9634 | w->current_matrix); | |
9635 | w->cursor.y -= first_reusable_row->y; | |
a2889657 JB |
9636 | } |
9637 | ||
5f5c8ee5 GM |
9638 | /* Scroll the display. */ |
9639 | run.current_y = first_reusable_row->y; | |
045dee35 | 9640 | run.desired_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9641 | run.height = it.last_visible_y - run.current_y; |
9642 | if (run.height) | |
9643 | { | |
9644 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
9645 | update_begin (f); | |
9646 | rif->update_window_begin_hook (w); | |
9647 | rif->scroll_run_hook (w, &run); | |
9648 | rif->update_window_end_hook (w, 0); | |
9649 | update_end (f); | |
9650 | } | |
a2889657 | 9651 | |
5f5c8ee5 GM |
9652 | /* Adjust Y positions of reused rows. */ |
9653 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w); | |
9654 | row = first_reusable_row; | |
9655 | dy = first_reusable_row->y; | |
045dee35 | 9656 | min_y = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w); |
5f5c8ee5 GM |
9657 | max_y = it.last_visible_y; |
9658 | while (row < first_row_to_display) | |
9659 | { | |
9660 | row->y -= dy; | |
9661 | if (row->y < min_y) | |
9662 | row->visible_height = row->height - (min_y - row->y); | |
9663 | else if (row->y + row->height > max_y) | |
9664 | row->visible_height | |
9665 | = row->height - (row->y + row->height - max_y); | |
9666 | else | |
9667 | row->visible_height = row->height; | |
9668 | ++row; | |
9669 | } | |
a2889657 | 9670 | |
5f5c8ee5 GM |
9671 | /* Disable rows not reused. */ |
9672 | while (row < bottom_row) | |
9673 | { | |
9674 | row->enabled_p = 0; | |
9675 | ++row; | |
9676 | } | |
9677 | ||
9678 | /* Scroll the current matrix. */ | |
9679 | xassert (nrows_scrolled > 0); | |
9680 | rotate_matrix (w->current_matrix, | |
9681 | start_vpos, | |
9682 | MATRIX_ROW_VPOS (bottom_row, w->current_matrix), | |
9683 | -nrows_scrolled); | |
9684 | ||
9685 | /* Adjust window end. A null value of last_text_row means that | |
9686 | the window end is in reused rows which in turn means that | |
9687 | only its vpos can have changed. */ | |
9688 | if (last_text_row) | |
9689 | { | |
9690 | w->window_end_bytepos | |
9691 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
9692 | XSETFASTINT (w->window_end_pos, | |
9693 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
9694 | XSETFASTINT (w->window_end_vpos, | |
9695 | MATRIX_ROW_VPOS (last_text_row, w->desired_matrix)); | |
9696 | } | |
9697 | else | |
a2889657 | 9698 | { |
e8e536a9 | 9699 | XSETFASTINT (w->window_end_vpos, |
5f5c8ee5 | 9700 | XFASTINT (w->window_end_vpos) - nrows_scrolled); |
a2889657 | 9701 | } |
5f5c8ee5 GM |
9702 | |
9703 | w->window_end_valid = Qnil; | |
9704 | w->desired_matrix->no_scrolling_p = 1; | |
9705 | ||
9706 | #if GLYPH_DEBUG | |
9707 | debug_method_add (w, "try_window_reusing_current_matrix 2"); | |
9708 | #endif | |
9709 | return 1; | |
a2889657 | 9710 | } |
5f5c8ee5 GM |
9711 | |
9712 | return 0; | |
9713 | } | |
a2889657 | 9714 | |
a2889657 | 9715 | |
5f5c8ee5 GM |
9716 | \f |
9717 | /************************************************************************ | |
9718 | Window redisplay reusing current matrix when buffer has changed | |
9719 | ************************************************************************/ | |
9720 | ||
9721 | static struct glyph_row *get_last_unchanged_at_beg_row P_ ((struct window *)); | |
9722 | static struct glyph_row *get_first_unchanged_at_end_row P_ ((struct window *, | |
9723 | int *, int *)); | |
9724 | static struct glyph_row * | |
9725 | find_last_row_displaying_text P_ ((struct glyph_matrix *, struct it *, | |
9726 | struct glyph_row *)); | |
9727 | ||
9728 | ||
9729 | /* Return the last row in MATRIX displaying text. If row START is | |
9730 | non-null, start searching with that row. IT gives the dimensions | |
9731 | of the display. Value is null if matrix is empty; otherwise it is | |
9732 | a pointer to the row found. */ | |
9733 | ||
9734 | static struct glyph_row * | |
9735 | find_last_row_displaying_text (matrix, it, start) | |
9736 | struct glyph_matrix *matrix; | |
9737 | struct it *it; | |
9738 | struct glyph_row *start; | |
9739 | { | |
9740 | struct glyph_row *row, *row_found; | |
9741 | ||
9742 | /* Set row_found to the last row in IT->w's current matrix | |
9743 | displaying text. The loop looks funny but think of partially | |
9744 | visible lines. */ | |
9745 | row_found = NULL; | |
9746 | row = start ? start : MATRIX_FIRST_TEXT_ROW (matrix); | |
9747 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9748 | { | |
9749 | xassert (row->enabled_p); | |
9750 | row_found = row; | |
9751 | if (MATRIX_ROW_BOTTOM_Y (row) >= it->last_visible_y) | |
9752 | break; | |
9753 | ++row; | |
a2889657 | 9754 | } |
5f5c8ee5 GM |
9755 | |
9756 | return row_found; | |
9757 | } | |
9758 | ||
a2889657 | 9759 | |
5f5c8ee5 GM |
9760 | /* Return the last row in the current matrix of W that is not affected |
9761 | by changes at the start of current_buffer that occurred since the | |
9762 | last time W was redisplayed. Value is null if no such row exists. | |
a2889657 | 9763 | |
5f5c8ee5 GM |
9764 | The global variable beg_unchanged has to contain the number of |
9765 | bytes unchanged at the start of current_buffer. BEG + | |
9766 | beg_unchanged is the buffer position of the first changed byte in | |
9767 | current_buffer. Characters at positions < BEG + beg_unchanged are | |
9768 | at the same buffer positions as they were when the current matrix | |
9769 | was built. */ | |
9770 | ||
9771 | static struct glyph_row * | |
9772 | get_last_unchanged_at_beg_row (w) | |
9773 | struct window *w; | |
9774 | { | |
9142dd5b | 9775 | int first_changed_pos = BEG + BEG_UNCHANGED; |
5f5c8ee5 GM |
9776 | struct glyph_row *row; |
9777 | struct glyph_row *row_found = NULL; | |
9778 | int yb = window_text_bottom_y (w); | |
9779 | ||
9780 | /* Find the last row displaying unchanged text. */ | |
9781 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9782 | while (MATRIX_ROW_DISPLAYS_TEXT_P (row) | |
9783 | && MATRIX_ROW_START_CHARPOS (row) < first_changed_pos) | |
a2889657 | 9784 | { |
5f5c8ee5 GM |
9785 | if (/* If row ends before first_changed_pos, it is unchanged, |
9786 | except in some case. */ | |
9787 | MATRIX_ROW_END_CHARPOS (row) <= first_changed_pos | |
9788 | /* When row ends in ZV and we write at ZV it is not | |
9789 | unchanged. */ | |
9790 | && !row->ends_at_zv_p | |
9791 | /* When first_changed_pos is the end of a continued line, | |
9792 | row is not unchanged because it may be no longer | |
9793 | continued. */ | |
9794 | && !(MATRIX_ROW_END_CHARPOS (row) == first_changed_pos | |
9795 | && row->continued_p)) | |
9796 | row_found = row; | |
9797 | ||
9798 | /* Stop if last visible row. */ | |
9799 | if (MATRIX_ROW_BOTTOM_Y (row) >= yb) | |
9800 | break; | |
9801 | ||
9802 | ++row; | |
a2889657 JB |
9803 | } |
9804 | ||
5f5c8ee5 | 9805 | return row_found; |
a2889657 | 9806 | } |
5f5c8ee5 GM |
9807 | |
9808 | ||
9809 | /* Find the first glyph row in the current matrix of W that is not | |
9810 | affected by changes at the end of current_buffer since the last | |
9811 | time the window was redisplayed. Return in *DELTA the number of | |
c59c668a GM |
9812 | chars by which buffer positions in unchanged text at the end of |
9813 | current_buffer must be adjusted. Return in *DELTA_BYTES the | |
9814 | corresponding number of bytes. Value is null if no such row | |
9815 | exists, i.e. all rows are affected by changes. */ | |
5f5c8ee5 GM |
9816 | |
9817 | static struct glyph_row * | |
9818 | get_first_unchanged_at_end_row (w, delta, delta_bytes) | |
9819 | struct window *w; | |
9820 | int *delta, *delta_bytes; | |
a2889657 | 9821 | { |
5f5c8ee5 GM |
9822 | struct glyph_row *row; |
9823 | struct glyph_row *row_found = NULL; | |
c581d710 | 9824 | |
5f5c8ee5 | 9825 | *delta = *delta_bytes = 0; |
b2a76982 | 9826 | |
5f5c8ee5 GM |
9827 | /* A value of window_end_pos >= end_unchanged means that the window |
9828 | end is in the range of changed text. If so, there is no | |
9829 | unchanged row at the end of W's current matrix. */ | |
9830 | xassert (!NILP (w->window_end_valid)); | |
9142dd5b | 9831 | if (XFASTINT (w->window_end_pos) >= END_UNCHANGED) |
5f5c8ee5 GM |
9832 | return NULL; |
9833 | ||
9834 | /* Set row to the last row in W's current matrix displaying text. */ | |
9835 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
9836 | ||
5f5c8ee5 GM |
9837 | /* If matrix is entirely empty, no unchanged row exists. */ |
9838 | if (MATRIX_ROW_DISPLAYS_TEXT_P (row)) | |
9839 | { | |
9840 | /* The value of row is the last glyph row in the matrix having a | |
9841 | meaningful buffer position in it. The end position of row | |
9842 | corresponds to window_end_pos. This allows us to translate | |
9843 | buffer positions in the current matrix to current buffer | |
9844 | positions for characters not in changed text. */ | |
9845 | int Z_old = MATRIX_ROW_END_CHARPOS (row) + XFASTINT (w->window_end_pos); | |
9846 | int Z_BYTE_old = MATRIX_ROW_END_BYTEPOS (row) + w->window_end_bytepos; | |
9847 | int last_unchanged_pos, last_unchanged_pos_old; | |
9848 | struct glyph_row *first_text_row | |
9849 | = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
9850 | ||
9851 | *delta = Z - Z_old; | |
9852 | *delta_bytes = Z_BYTE - Z_BYTE_old; | |
9853 | ||
9854 | /* Set last_unchanged_pos to the buffer position of the last | |
9855 | character in the buffer that has not been changed. Z is the | |
9856 | index + 1 of the last byte in current_buffer, i.e. by | |
9857 | subtracting end_unchanged we get the index of the last | |
9858 | unchanged character, and we have to add BEG to get its buffer | |
9859 | position. */ | |
9142dd5b | 9860 | last_unchanged_pos = Z - END_UNCHANGED + BEG; |
5f5c8ee5 GM |
9861 | last_unchanged_pos_old = last_unchanged_pos - *delta; |
9862 | ||
9863 | /* Search backward from ROW for a row displaying a line that | |
9864 | starts at a minimum position >= last_unchanged_pos_old. */ | |
9865 | while (row >= first_text_row) | |
9866 | { | |
9867 | xassert (row->enabled_p); | |
9868 | xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
9869 | ||
9870 | if (MATRIX_ROW_START_CHARPOS (row) >= last_unchanged_pos_old) | |
9871 | row_found = row; | |
9872 | --row; | |
9873 | } | |
9874 | } | |
9875 | ||
9876 | xassert (!row_found || MATRIX_ROW_DISPLAYS_TEXT_P (row_found)); | |
9877 | return row_found; | |
c581d710 RS |
9878 | } |
9879 | ||
c581d710 | 9880 | |
5f5c8ee5 GM |
9881 | /* Make sure that glyph rows in the current matrix of window W |
9882 | reference the same glyph memory as corresponding rows in the | |
9883 | frame's frame matrix. This function is called after scrolling W's | |
9884 | current matrix on a terminal frame in try_window_id and | |
9885 | try_window_reusing_current_matrix. */ | |
9886 | ||
9887 | static void | |
9888 | sync_frame_with_window_matrix_rows (w) | |
9889 | struct window *w; | |
c581d710 | 9890 | { |
5f5c8ee5 GM |
9891 | struct frame *f = XFRAME (w->frame); |
9892 | struct glyph_row *window_row, *window_row_end, *frame_row; | |
9893 | ||
9894 | /* Preconditions: W must be a leaf window and full-width. Its frame | |
9895 | must have a frame matrix. */ | |
9896 | xassert (NILP (w->hchild) && NILP (w->vchild)); | |
9897 | xassert (WINDOW_FULL_WIDTH_P (w)); | |
9898 | xassert (!FRAME_WINDOW_P (f)); | |
9899 | ||
9900 | /* If W is a full-width window, glyph pointers in W's current matrix | |
9901 | have, by definition, to be the same as glyph pointers in the | |
9902 | corresponding frame matrix. */ | |
9903 | window_row = w->current_matrix->rows; | |
9904 | window_row_end = window_row + w->current_matrix->nrows; | |
9905 | frame_row = f->current_matrix->rows + XFASTINT (w->top); | |
9906 | while (window_row < window_row_end) | |
659a218f | 9907 | { |
5f5c8ee5 | 9908 | int area; |
f002db93 | 9909 | |
5f5c8ee5 GM |
9910 | for (area = LEFT_MARGIN_AREA; area <= LAST_AREA; ++area) |
9911 | frame_row->glyphs[area] = window_row->glyphs[area]; | |
f002db93 GM |
9912 | |
9913 | /* Disable frame rows whose corresponding window rows have | |
9914 | been disabled in try_window_id. */ | |
9915 | if (!window_row->enabled_p) | |
9916 | frame_row->enabled_p = 0; | |
9917 | ||
5f5c8ee5 | 9918 | ++window_row, ++frame_row; |
659a218f | 9919 | } |
a2889657 | 9920 | } |
5f5c8ee5 GM |
9921 | |
9922 | ||
e037b9ec GM |
9923 | /* Find the glyph row in window W containing CHARPOS. Consider all |
9924 | rows between START and END (not inclusive). END null means search | |
9925 | all rows to the end of the display area of W. Value is the row | |
9926 | containing CHARPOS or null. */ | |
9927 | ||
9928 | static struct glyph_row * | |
9929 | row_containing_pos (w, charpos, start, end) | |
9930 | struct window *w; | |
9931 | int charpos; | |
9932 | struct glyph_row *start, *end; | |
9933 | { | |
9934 | struct glyph_row *row = start; | |
9935 | int last_y; | |
9936 | ||
9937 | /* If we happen to start on a header-line, skip that. */ | |
9938 | if (row->mode_line_p) | |
9939 | ++row; | |
9940 | ||
9941 | if ((end && row >= end) || !row->enabled_p) | |
9942 | return NULL; | |
9943 | ||
9944 | last_y = window_text_bottom_y (w); | |
9945 | ||
9946 | while ((end == NULL || row < end) | |
9947 | && (MATRIX_ROW_END_CHARPOS (row) < charpos | |
9948 | /* The end position of a row equals the start | |
9949 | position of the next row. If CHARPOS is there, we | |
9950 | would rather display it in the next line, except | |
9951 | when this line ends in ZV. */ | |
9952 | || (MATRIX_ROW_END_CHARPOS (row) == charpos | |
9953 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
9954 | || !row->ends_at_zv_p))) | |
9955 | && MATRIX_ROW_BOTTOM_Y (row) < last_y) | |
9956 | ++row; | |
9957 | ||
9958 | /* Give up if CHARPOS not found. */ | |
9959 | if ((end && row >= end) | |
9960 | || charpos < MATRIX_ROW_START_CHARPOS (row) | |
9961 | || charpos > MATRIX_ROW_END_CHARPOS (row)) | |
9962 | row = NULL; | |
9963 | ||
9964 | return row; | |
9965 | } | |
9966 | ||
9967 | ||
5f5c8ee5 GM |
9968 | /* Try to redisplay window W by reusing its existing display. W's |
9969 | current matrix must be up to date when this function is called, | |
9970 | i.e. window_end_valid must not be nil. | |
9971 | ||
9972 | Value is | |
9973 | ||
9974 | 1 if display has been updated | |
9975 | 0 if otherwise unsuccessful | |
9976 | -1 if redisplay with same window start is known not to succeed | |
9977 | ||
9978 | The following steps are performed: | |
9979 | ||
9980 | 1. Find the last row in the current matrix of W that is not | |
9981 | affected by changes at the start of current_buffer. If no such row | |
9982 | is found, give up. | |
9983 | ||
9984 | 2. Find the first row in W's current matrix that is not affected by | |
9985 | changes at the end of current_buffer. Maybe there is no such row. | |
9986 | ||
9987 | 3. Display lines beginning with the row + 1 found in step 1 to the | |
9988 | row found in step 2 or, if step 2 didn't find a row, to the end of | |
9989 | the window. | |
9990 | ||
9991 | 4. If cursor is not known to appear on the window, give up. | |
9992 | ||
9993 | 5. If display stopped at the row found in step 2, scroll the | |
9994 | display and current matrix as needed. | |
9995 | ||
9996 | 6. Maybe display some lines at the end of W, if we must. This can | |
9997 | happen under various circumstances, like a partially visible line | |
9998 | becoming fully visible, or because newly displayed lines are displayed | |
9999 | in smaller font sizes. | |
10000 | ||
10001 | 7. Update W's window end information. */ | |
10002 | ||
10003 | /* Check that window end is what we expect it to be. */ | |
12adba34 RS |
10004 | |
10005 | static int | |
5f5c8ee5 | 10006 | try_window_id (w) |
12adba34 | 10007 | struct window *w; |
12adba34 | 10008 | { |
5f5c8ee5 GM |
10009 | struct frame *f = XFRAME (w->frame); |
10010 | struct glyph_matrix *current_matrix = w->current_matrix; | |
10011 | struct glyph_matrix *desired_matrix = w->desired_matrix; | |
10012 | struct glyph_row *last_unchanged_at_beg_row; | |
10013 | struct glyph_row *first_unchanged_at_end_row; | |
10014 | struct glyph_row *row; | |
10015 | struct glyph_row *bottom_row; | |
10016 | int bottom_vpos; | |
10017 | struct it it; | |
10018 | int delta = 0, delta_bytes = 0, stop_pos, dvpos, dy; | |
10019 | struct text_pos start_pos; | |
10020 | struct run run; | |
10021 | int first_unchanged_at_end_vpos = 0; | |
10022 | struct glyph_row *last_text_row, *last_text_row_at_end; | |
10023 | struct text_pos start; | |
10024 | ||
10025 | SET_TEXT_POS_FROM_MARKER (start, w->start); | |
10026 | ||
10027 | /* Check pre-conditions. Window end must be valid, otherwise | |
10028 | the current matrix would not be up to date. */ | |
10029 | xassert (!NILP (w->window_end_valid)); | |
10030 | xassert (FRAME_WINDOW_P (XFRAME (w->frame)) | |
10031 | || (line_ins_del_ok && WINDOW_FULL_WIDTH_P (w))); | |
10032 | ||
10033 | /* Make sure beg_unchanged and end_unchanged are up to date. Do it | |
10034 | only if buffer has really changed. The reason is that the gap is | |
10035 | initially at Z for freshly visited files. The code below would | |
10036 | set end_unchanged to 0 in that case. */ | |
bf9249e3 | 10037 | if (MODIFF > SAVE_MODIFF) |
5f5c8ee5 | 10038 | { |
9142dd5b GM |
10039 | if (GPT - BEG < BEG_UNCHANGED) |
10040 | BEG_UNCHANGED = GPT - BEG; | |
10041 | if (Z - GPT < END_UNCHANGED) | |
10042 | END_UNCHANGED = Z - GPT; | |
5f5c8ee5 | 10043 | } |
bf9249e3 GM |
10044 | |
10045 | /* Some strange bug seems to be causing that to happen sometimes. */ | |
10046 | if (BEG_UNCHANGED + END_UNCHANGED > Z_BYTE) | |
10047 | abort (); | |
5f5c8ee5 GM |
10048 | |
10049 | /* If window starts after a line end, and the last change is in | |
10050 | front of that newline, then changes don't affect the display. | |
10051 | This case happens with stealth-fontification. */ | |
10052 | row = MATRIX_ROW (w->current_matrix, XFASTINT (w->window_end_vpos)); | |
10053 | if (CHARPOS (start) > BEGV | |
9142dd5b | 10054 | && Z - END_UNCHANGED < CHARPOS (start) - 1 |
5f5c8ee5 GM |
10055 | && FETCH_BYTE (BYTEPOS (start) - 1) == '\n' |
10056 | && PT < MATRIX_ROW_END_CHARPOS (row)) | |
10057 | { | |
10058 | /* We have to update window end positions because the buffer's | |
10059 | size has changed. */ | |
10060 | w->window_end_pos | |
10061 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
10062 | w->window_end_bytepos | |
10063 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
10064 | return 1; | |
10065 | } | |
10066 | ||
10067 | /* Return quickly if changes are all below what is displayed in the | |
10068 | window, and if PT is in the window. */ | |
9142dd5b | 10069 | if (BEG_UNCHANGED > MATRIX_ROW_END_CHARPOS (row) |
5f5c8ee5 GM |
10070 | && PT < MATRIX_ROW_END_CHARPOS (row)) |
10071 | { | |
10072 | /* We have to update window end positions because the buffer's | |
10073 | size has changed. */ | |
10074 | w->window_end_pos | |
10075 | = make_number (Z - MATRIX_ROW_END_CHARPOS (row)); | |
10076 | w->window_end_bytepos | |
10077 | = make_number (Z_BYTE - MATRIX_ROW_END_BYTEPOS (row)); | |
10078 | return 1; | |
10079 | } | |
10080 | ||
10081 | /* Check that window start agrees with the start of the first glyph | |
10082 | row in its current matrix. Check this after we know the window | |
10083 | start is not in changed text, otherwise positions would not be | |
10084 | comparable. */ | |
10085 | row = MATRIX_FIRST_TEXT_ROW (w->current_matrix); | |
10086 | if (!TEXT_POS_EQUAL_P (start, row->start.pos)) | |
10087 | return 0; | |
10088 | ||
5f5c8ee5 GM |
10089 | /* Compute the position at which we have to start displaying new |
10090 | lines. Some of the lines at the top of the window might be | |
10091 | reusable because they are not displaying changed text. Find the | |
10092 | last row in W's current matrix not affected by changes at the | |
10093 | start of current_buffer. Value is null if changes start in the | |
10094 | first line of window. */ | |
10095 | last_unchanged_at_beg_row = get_last_unchanged_at_beg_row (w); | |
10096 | if (last_unchanged_at_beg_row) | |
10097 | { | |
10098 | init_to_row_end (&it, w, last_unchanged_at_beg_row); | |
10099 | start_pos = it.current.pos; | |
10100 | ||
10101 | /* Start displaying new lines in the desired matrix at the same | |
10102 | vpos we would use in the current matrix, i.e. below | |
10103 | last_unchanged_at_beg_row. */ | |
10104 | it.vpos = 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row, | |
10105 | current_matrix); | |
10106 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10107 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row); | |
10108 | ||
10109 | xassert (it.hpos == 0 && it.current_x == 0); | |
10110 | } | |
10111 | else | |
10112 | { | |
10113 | /* There are no reusable lines at the start of the window. | |
10114 | Start displaying in the first line. */ | |
10115 | start_display (&it, w, start); | |
10116 | start_pos = it.current.pos; | |
10117 | } | |
10118 | ||
5f5c8ee5 GM |
10119 | /* Find the first row that is not affected by changes at the end of |
10120 | the buffer. Value will be null if there is no unchanged row, in | |
10121 | which case we must redisplay to the end of the window. delta | |
10122 | will be set to the value by which buffer positions beginning with | |
10123 | first_unchanged_at_end_row have to be adjusted due to text | |
10124 | changes. */ | |
10125 | first_unchanged_at_end_row | |
10126 | = get_first_unchanged_at_end_row (w, &delta, &delta_bytes); | |
10127 | IF_DEBUG (debug_delta = delta); | |
10128 | IF_DEBUG (debug_delta_bytes = delta_bytes); | |
10129 | ||
10130 | /* Set stop_pos to the buffer position up to which we will have to | |
10131 | display new lines. If first_unchanged_at_end_row != NULL, this | |
10132 | is the buffer position of the start of the line displayed in that | |
10133 | row. For first_unchanged_at_end_row == NULL, use 0 to indicate | |
10134 | that we don't stop at a buffer position. */ | |
10135 | stop_pos = 0; | |
10136 | if (first_unchanged_at_end_row) | |
10137 | { | |
10138 | xassert (last_unchanged_at_beg_row == NULL | |
10139 | || first_unchanged_at_end_row >= last_unchanged_at_beg_row); | |
10140 | ||
10141 | /* If this is a continuation line, move forward to the next one | |
10142 | that isn't. Changes in lines above affect this line. | |
10143 | Caution: this may move first_unchanged_at_end_row to a row | |
10144 | not displaying text. */ | |
10145 | while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row) | |
10146 | && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
10147 | && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
10148 | < it.last_visible_y)) | |
10149 | ++first_unchanged_at_end_row; | |
10150 | ||
10151 | if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row) | |
10152 | || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row) | |
10153 | >= it.last_visible_y)) | |
10154 | first_unchanged_at_end_row = NULL; | |
10155 | else | |
10156 | { | |
10157 | stop_pos = (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row) | |
10158 | + delta); | |
10159 | first_unchanged_at_end_vpos | |
10160 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, current_matrix); | |
9142dd5b | 10161 | xassert (stop_pos >= Z - END_UNCHANGED); |
5f5c8ee5 GM |
10162 | } |
10163 | } | |
10164 | else if (last_unchanged_at_beg_row == NULL) | |
10165 | return 0; | |
10166 | ||
10167 | ||
10168 | #if GLYPH_DEBUG | |
10169 | ||
10170 | /* Either there is no unchanged row at the end, or the one we have | |
10171 | now displays text. This is a necessary condition for the window | |
10172 | end pos calculation at the end of this function. */ | |
10173 | xassert (first_unchanged_at_end_row == NULL | |
10174 | || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row)); | |
10175 | ||
10176 | debug_last_unchanged_at_beg_vpos | |
10177 | = (last_unchanged_at_beg_row | |
10178 | ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row, current_matrix) | |
10179 | : -1); | |
10180 | debug_first_unchanged_at_end_vpos = first_unchanged_at_end_vpos; | |
10181 | ||
10182 | #endif /* GLYPH_DEBUG != 0 */ | |
10183 | ||
10184 | ||
10185 | /* Display new lines. Set last_text_row to the last new line | |
10186 | displayed which has text on it, i.e. might end up as being the | |
10187 | line where the window_end_vpos is. */ | |
10188 | w->cursor.vpos = -1; | |
10189 | last_text_row = NULL; | |
10190 | overlay_arrow_seen = 0; | |
10191 | while (it.current_y < it.last_visible_y | |
10192 | && !fonts_changed_p | |
10193 | && (first_unchanged_at_end_row == NULL | |
10194 | || IT_CHARPOS (it) < stop_pos)) | |
10195 | { | |
10196 | if (display_line (&it)) | |
10197 | last_text_row = it.glyph_row - 1; | |
10198 | } | |
10199 | ||
10200 | if (fonts_changed_p) | |
10201 | return -1; | |
10202 | ||
10203 | ||
10204 | /* Compute differences in buffer positions, y-positions etc. for | |
10205 | lines reused at the bottom of the window. Compute what we can | |
10206 | scroll. */ | |
ca42b2e8 GM |
10207 | if (first_unchanged_at_end_row |
10208 | /* No lines reused because we displayed everything up to the | |
10209 | bottom of the window. */ | |
10210 | && it.current_y < it.last_visible_y) | |
5f5c8ee5 GM |
10211 | { |
10212 | dvpos = (it.vpos | |
10213 | - MATRIX_ROW_VPOS (first_unchanged_at_end_row, | |
10214 | current_matrix)); | |
10215 | dy = it.current_y - first_unchanged_at_end_row->y; | |
10216 | run.current_y = first_unchanged_at_end_row->y; | |
10217 | run.desired_y = run.current_y + dy; | |
10218 | run.height = it.last_visible_y - max (run.current_y, run.desired_y); | |
10219 | } | |
10220 | else | |
ca42b2e8 GM |
10221 | { |
10222 | delta = dvpos = dy = run.current_y = run.desired_y = run.height = 0; | |
10223 | first_unchanged_at_end_row = NULL; | |
10224 | } | |
5f5c8ee5 GM |
10225 | IF_DEBUG (debug_dvpos = dvpos; debug_dy = dy); |
10226 | ||
8f8ba186 | 10227 | |
5f5c8ee5 GM |
10228 | /* Find the cursor if not already found. We have to decide whether |
10229 | PT will appear on this window (it sometimes doesn't, but this is | |
10230 | not a very frequent case.) This decision has to be made before | |
10231 | the current matrix is altered. A value of cursor.vpos < 0 means | |
10232 | that PT is either in one of the lines beginning at | |
10233 | first_unchanged_at_end_row or below the window. Don't care for | |
10234 | lines that might be displayed later at the window end; as | |
10235 | mentioned, this is not a frequent case. */ | |
10236 | if (w->cursor.vpos < 0) | |
10237 | { | |
5f5c8ee5 GM |
10238 | /* Cursor in unchanged rows at the top? */ |
10239 | if (PT < CHARPOS (start_pos) | |
10240 | && last_unchanged_at_beg_row) | |
10241 | { | |
e037b9ec GM |
10242 | row = row_containing_pos (w, PT, |
10243 | MATRIX_FIRST_TEXT_ROW (w->current_matrix), | |
10244 | last_unchanged_at_beg_row + 1); | |
10245 | xassert (row && row <= last_unchanged_at_beg_row); | |
5f5c8ee5 GM |
10246 | set_cursor_from_row (w, row, w->current_matrix, 0, 0, 0, 0); |
10247 | } | |
10248 | ||
10249 | /* Start from first_unchanged_at_end_row looking for PT. */ | |
10250 | else if (first_unchanged_at_end_row) | |
10251 | { | |
e037b9ec GM |
10252 | row = row_containing_pos (w, PT - delta, |
10253 | first_unchanged_at_end_row, NULL); | |
10254 | if (row) | |
468155d7 GM |
10255 | set_cursor_from_row (w, row, w->current_matrix, delta, |
10256 | delta_bytes, dy, dvpos); | |
5f5c8ee5 GM |
10257 | } |
10258 | ||
10259 | /* Give up if cursor was not found. */ | |
10260 | if (w->cursor.vpos < 0) | |
10261 | { | |
10262 | clear_glyph_matrix (w->desired_matrix); | |
10263 | return -1; | |
10264 | } | |
10265 | } | |
10266 | ||
10267 | /* Don't let the cursor end in the scroll margins. */ | |
10268 | { | |
10269 | int this_scroll_margin, cursor_height; | |
10270 | ||
10271 | this_scroll_margin = max (0, scroll_margin); | |
10272 | this_scroll_margin = min (this_scroll_margin, | |
10273 | XFASTINT (w->height) / 4); | |
10274 | this_scroll_margin *= CANON_Y_UNIT (it.f); | |
10275 | cursor_height = MATRIX_ROW (w->desired_matrix, w->cursor.vpos)->height; | |
10276 | ||
10277 | if ((w->cursor.y < this_scroll_margin | |
10278 | && CHARPOS (start) > BEGV) | |
10279 | /* Don't take scroll margin into account at the bottom because | |
10280 | old redisplay didn't do it either. */ | |
10281 | || w->cursor.y + cursor_height > it.last_visible_y) | |
10282 | { | |
10283 | w->cursor.vpos = -1; | |
10284 | clear_glyph_matrix (w->desired_matrix); | |
10285 | return -1; | |
10286 | } | |
10287 | } | |
10288 | ||
10289 | /* Scroll the display. Do it before changing the current matrix so | |
10290 | that xterm.c doesn't get confused about where the cursor glyph is | |
10291 | found. */ | |
10292 | if (dy) | |
10293 | { | |
10294 | update_begin (f); | |
10295 | ||
10296 | if (FRAME_WINDOW_P (f)) | |
10297 | { | |
10298 | rif->update_window_begin_hook (w); | |
10299 | rif->scroll_run_hook (w, &run); | |
10300 | rif->update_window_end_hook (w, 0); | |
10301 | } | |
10302 | else | |
10303 | { | |
10304 | /* Terminal frame. In this case, dvpos gives the number of | |
10305 | lines to scroll by; dvpos < 0 means scroll up. */ | |
10306 | int first_unchanged_at_end_vpos | |
10307 | = MATRIX_ROW_VPOS (first_unchanged_at_end_row, w->current_matrix); | |
10308 | int from = XFASTINT (w->top) + first_unchanged_at_end_vpos; | |
10309 | int end = XFASTINT (w->top) + window_internal_height (w); | |
10310 | ||
10311 | /* Perform the operation on the screen. */ | |
10312 | if (dvpos > 0) | |
10313 | { | |
10314 | /* Scroll last_unchanged_at_beg_row to the end of the | |
10315 | window down dvpos lines. */ | |
10316 | set_terminal_window (end); | |
10317 | ||
10318 | /* On dumb terminals delete dvpos lines at the end | |
10319 | before inserting dvpos empty lines. */ | |
10320 | if (!scroll_region_ok) | |
10321 | ins_del_lines (end - dvpos, -dvpos); | |
10322 | ||
10323 | /* Insert dvpos empty lines in front of | |
10324 | last_unchanged_at_beg_row. */ | |
10325 | ins_del_lines (from, dvpos); | |
10326 | } | |
10327 | else if (dvpos < 0) | |
10328 | { | |
10329 | /* Scroll up last_unchanged_at_beg_vpos to the end of | |
10330 | the window to last_unchanged_at_beg_vpos - |dvpos|. */ | |
10331 | set_terminal_window (end); | |
10332 | ||
10333 | /* Delete dvpos lines in front of | |
10334 | last_unchanged_at_beg_vpos. ins_del_lines will set | |
10335 | the cursor to the given vpos and emit |dvpos| delete | |
10336 | line sequences. */ | |
10337 | ins_del_lines (from + dvpos, dvpos); | |
10338 | ||
10339 | /* On a dumb terminal insert dvpos empty lines at the | |
10340 | end. */ | |
10341 | if (!scroll_region_ok) | |
10342 | ins_del_lines (end + dvpos, -dvpos); | |
10343 | } | |
10344 | ||
10345 | set_terminal_window (0); | |
10346 | } | |
10347 | ||
10348 | update_end (f); | |
10349 | } | |
10350 | ||
ca42b2e8 GM |
10351 | /* Shift reused rows of the current matrix to the right position. |
10352 | BOTTOM_ROW is the last + 1 row in the current matrix reserved for | |
10353 | text. */ | |
10354 | bottom_row = MATRIX_BOTTOM_TEXT_ROW (current_matrix, w); | |
10355 | bottom_vpos = MATRIX_ROW_VPOS (bottom_row, current_matrix); | |
5f5c8ee5 GM |
10356 | if (dvpos < 0) |
10357 | { | |
10358 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos + dvpos, | |
10359 | bottom_vpos, dvpos); | |
10360 | enable_glyph_matrix_rows (current_matrix, bottom_vpos + dvpos, | |
10361 | bottom_vpos, 0); | |
10362 | } | |
10363 | else if (dvpos > 0) | |
10364 | { | |
10365 | rotate_matrix (current_matrix, first_unchanged_at_end_vpos, | |
10366 | bottom_vpos, dvpos); | |
10367 | enable_glyph_matrix_rows (current_matrix, first_unchanged_at_end_vpos, | |
10368 | first_unchanged_at_end_vpos + dvpos, 0); | |
10369 | } | |
10370 | ||
10371 | /* For frame-based redisplay, make sure that current frame and window | |
10372 | matrix are in sync with respect to glyph memory. */ | |
10373 | if (!FRAME_WINDOW_P (f)) | |
10374 | sync_frame_with_window_matrix_rows (w); | |
10375 | ||
10376 | /* Adjust buffer positions in reused rows. */ | |
10377 | if (delta) | |
10378 | increment_glyph_matrix_buffer_positions (current_matrix, | |
10379 | first_unchanged_at_end_vpos + dvpos, | |
10380 | bottom_vpos, delta, delta_bytes); | |
10381 | ||
10382 | /* Adjust Y positions. */ | |
10383 | if (dy) | |
10384 | shift_glyph_matrix (w, current_matrix, | |
10385 | first_unchanged_at_end_vpos + dvpos, | |
10386 | bottom_vpos, dy); | |
10387 | ||
10388 | if (first_unchanged_at_end_row) | |
10389 | first_unchanged_at_end_row += dvpos; | |
10390 | ||
10391 | /* If scrolling up, there may be some lines to display at the end of | |
10392 | the window. */ | |
10393 | last_text_row_at_end = NULL; | |
10394 | if (dy < 0) | |
10395 | { | |
10396 | /* Set last_row to the glyph row in the current matrix where the | |
10397 | window end line is found. It has been moved up or down in | |
10398 | the matrix by dvpos. */ | |
10399 | int last_vpos = XFASTINT (w->window_end_vpos) + dvpos; | |
10400 | struct glyph_row *last_row = MATRIX_ROW (current_matrix, last_vpos); | |
10401 | ||
10402 | /* If last_row is the window end line, it should display text. */ | |
10403 | xassert (last_row->displays_text_p); | |
10404 | ||
10405 | /* If window end line was partially visible before, begin | |
10406 | displaying at that line. Otherwise begin displaying with the | |
10407 | line following it. */ | |
10408 | if (MATRIX_ROW_BOTTOM_Y (last_row) - dy >= it.last_visible_y) | |
10409 | { | |
10410 | init_to_row_start (&it, w, last_row); | |
10411 | it.vpos = last_vpos; | |
10412 | it.current_y = last_row->y; | |
10413 | } | |
10414 | else | |
10415 | { | |
10416 | init_to_row_end (&it, w, last_row); | |
10417 | it.vpos = 1 + last_vpos; | |
10418 | it.current_y = MATRIX_ROW_BOTTOM_Y (last_row); | |
10419 | ++last_row; | |
10420 | } | |
12adba34 | 10421 | |
5f5c8ee5 GM |
10422 | /* We may start in a continuation line. If so, we have to get |
10423 | the right continuation_lines_width and current_x. */ | |
10424 | it.continuation_lines_width = last_row->continuation_lines_width; | |
10425 | it.hpos = it.current_x = 0; | |
10426 | ||
10427 | /* Display the rest of the lines at the window end. */ | |
10428 | it.glyph_row = MATRIX_ROW (desired_matrix, it.vpos); | |
10429 | while (it.current_y < it.last_visible_y | |
10430 | && !fonts_changed_p) | |
10431 | { | |
10432 | /* Is it always sure that the display agrees with lines in | |
10433 | the current matrix? I don't think so, so we mark rows | |
10434 | displayed invalid in the current matrix by setting their | |
10435 | enabled_p flag to zero. */ | |
10436 | MATRIX_ROW (w->current_matrix, it.vpos)->enabled_p = 0; | |
10437 | if (display_line (&it)) | |
10438 | last_text_row_at_end = it.glyph_row - 1; | |
10439 | } | |
10440 | } | |
12adba34 | 10441 | |
5f5c8ee5 GM |
10442 | /* Update window_end_pos and window_end_vpos. */ |
10443 | if (first_unchanged_at_end_row | |
10444 | && first_unchanged_at_end_row->y < it.last_visible_y | |
10445 | && !last_text_row_at_end) | |
10446 | { | |
10447 | /* Window end line if one of the preserved rows from the current | |
10448 | matrix. Set row to the last row displaying text in current | |
10449 | matrix starting at first_unchanged_at_end_row, after | |
10450 | scrolling. */ | |
10451 | xassert (first_unchanged_at_end_row->displays_text_p); | |
10452 | row = find_last_row_displaying_text (w->current_matrix, &it, | |
10453 | first_unchanged_at_end_row); | |
10454 | xassert (row && MATRIX_ROW_DISPLAYS_TEXT_P (row)); | |
10455 | ||
10456 | XSETFASTINT (w->window_end_pos, Z - MATRIX_ROW_END_CHARPOS (row)); | |
10457 | w->window_end_bytepos = Z_BYTE - MATRIX_ROW_END_BYTEPOS (row); | |
10458 | XSETFASTINT (w->window_end_vpos, | |
10459 | MATRIX_ROW_VPOS (row, w->current_matrix)); | |
10460 | } | |
10461 | else if (last_text_row_at_end) | |
10462 | { | |
10463 | XSETFASTINT (w->window_end_pos, | |
10464 | Z - MATRIX_ROW_END_CHARPOS (last_text_row_at_end)); | |
10465 | w->window_end_bytepos | |
10466 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row_at_end); | |
10467 | XSETFASTINT (w->window_end_vpos, | |
10468 | MATRIX_ROW_VPOS (last_text_row_at_end, desired_matrix)); | |
10469 | } | |
10470 | else if (last_text_row) | |
10471 | { | |
10472 | /* We have displayed either to the end of the window or at the | |
10473 | end of the window, i.e. the last row with text is to be found | |
10474 | in the desired matrix. */ | |
10475 | XSETFASTINT (w->window_end_pos, | |
10476 | Z - MATRIX_ROW_END_CHARPOS (last_text_row)); | |
10477 | w->window_end_bytepos | |
10478 | = Z_BYTE - MATRIX_ROW_END_BYTEPOS (last_text_row); | |
10479 | XSETFASTINT (w->window_end_vpos, | |
10480 | MATRIX_ROW_VPOS (last_text_row, desired_matrix)); | |
10481 | } | |
10482 | else if (first_unchanged_at_end_row == NULL | |
10483 | && last_text_row == NULL | |
10484 | && last_text_row_at_end == NULL) | |
10485 | { | |
10486 | /* Displayed to end of window, but no line containing text was | |
10487 | displayed. Lines were deleted at the end of the window. */ | |
10488 | int vpos; | |
045dee35 | 10489 | int header_line_p = WINDOW_WANTS_HEADER_LINE_P (w) ? 1 : 0; |
5f5c8ee5 GM |
10490 | |
10491 | for (vpos = XFASTINT (w->window_end_vpos); vpos > 0; --vpos) | |
045dee35 GM |
10492 | if ((w->desired_matrix->rows[vpos + header_line_p].enabled_p |
10493 | && w->desired_matrix->rows[vpos + header_line_p].displays_text_p) | |
10494 | || (!w->desired_matrix->rows[vpos + header_line_p].enabled_p | |
10495 | && w->current_matrix->rows[vpos + header_line_p].displays_text_p)) | |
5f5c8ee5 | 10496 | break; |
12adba34 | 10497 | |
5f5c8ee5 GM |
10498 | w->window_end_vpos = make_number (vpos); |
10499 | } | |
10500 | else | |
10501 | abort (); | |
10502 | ||
10503 | IF_DEBUG (debug_end_pos = XFASTINT (w->window_end_pos); | |
10504 | debug_end_vpos = XFASTINT (w->window_end_vpos)); | |
12adba34 | 10505 | |
5f5c8ee5 GM |
10506 | /* Record that display has not been completed. */ |
10507 | w->window_end_valid = Qnil; | |
10508 | w->desired_matrix->no_scrolling_p = 1; | |
10509 | return 1; | |
12adba34 | 10510 | } |
0f9c0ff0 | 10511 | |
a2889657 | 10512 | |
5f5c8ee5 GM |
10513 | \f |
10514 | /*********************************************************************** | |
10515 | More debugging support | |
10516 | ***********************************************************************/ | |
a2889657 | 10517 | |
5f5c8ee5 | 10518 | #if GLYPH_DEBUG |
a2889657 | 10519 | |
5f5c8ee5 GM |
10520 | void dump_glyph_row P_ ((struct glyph_matrix *, int, int)); |
10521 | static void dump_glyph_matrix P_ ((struct glyph_matrix *, int)); | |
1c9241f5 | 10522 | |
31b24551 | 10523 | |
5f5c8ee5 GM |
10524 | /* Dump the contents of glyph matrix MATRIX on stderr. If |
10525 | WITH_GLYPHS_P is non-zero, dump glyph contents as well. */ | |
ca26e1c8 | 10526 | |
5f5c8ee5 GM |
10527 | void |
10528 | dump_glyph_matrix (matrix, with_glyphs_p) | |
10529 | struct glyph_matrix *matrix; | |
10530 | int with_glyphs_p; | |
10531 | { | |
efc63ef0 | 10532 | int i; |
5f5c8ee5 GM |
10533 | for (i = 0; i < matrix->nrows; ++i) |
10534 | dump_glyph_row (matrix, i, with_glyphs_p); | |
10535 | } | |
31b24551 | 10536 | |
68a37fa8 | 10537 | |
5f5c8ee5 GM |
10538 | /* Dump the contents of glyph row at VPOS in MATRIX to stderr. |
10539 | WITH_GLYPH_SP non-zero means dump glyph contents, too. */ | |
a2889657 | 10540 | |
5f5c8ee5 GM |
10541 | void |
10542 | dump_glyph_row (matrix, vpos, with_glyphs_p) | |
10543 | struct glyph_matrix *matrix; | |
10544 | int vpos, with_glyphs_p; | |
10545 | { | |
10546 | struct glyph_row *row; | |
10547 | ||
10548 | if (vpos < 0 || vpos >= matrix->nrows) | |
10549 | return; | |
10550 | ||
10551 | row = MATRIX_ROW (matrix, vpos); | |
10552 | ||
10553 | fprintf (stderr, "Row Start End Used oEI><O\\CTZF X Y W\n"); | |
10554 | fprintf (stderr, "=============================================\n"); | |
10555 | ||
10556 | 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", | |
10557 | row - matrix->rows, | |
10558 | MATRIX_ROW_START_CHARPOS (row), | |
10559 | MATRIX_ROW_END_CHARPOS (row), | |
10560 | row->used[TEXT_AREA], | |
10561 | row->contains_overlapping_glyphs_p, | |
10562 | row->enabled_p, | |
10563 | row->inverse_p, | |
10564 | row->truncated_on_left_p, | |
10565 | row->truncated_on_right_p, | |
10566 | row->overlay_arrow_p, | |
10567 | row->continued_p, | |
10568 | MATRIX_ROW_CONTINUATION_LINE_P (row), | |
10569 | row->displays_text_p, | |
10570 | row->ends_at_zv_p, | |
10571 | row->fill_line_p, | |
10572 | row->x, | |
10573 | row->y, | |
10574 | row->pixel_width); | |
10575 | fprintf (stderr, "%9d %5d\n", row->start.overlay_string_index, | |
10576 | row->end.overlay_string_index); | |
10577 | fprintf (stderr, "%9d %5d\n", | |
10578 | CHARPOS (row->start.string_pos), | |
10579 | CHARPOS (row->end.string_pos)); | |
10580 | fprintf (stderr, "%9d %5d\n", row->start.dpvec_index, | |
10581 | row->end.dpvec_index); | |
10582 | ||
10583 | if (with_glyphs_p) | |
bd66d1ba | 10584 | { |
5f5c8ee5 GM |
10585 | struct glyph *glyph, *glyph_end; |
10586 | int prev_had_glyphs_p; | |
10587 | ||
10588 | glyph = row->glyphs[TEXT_AREA]; | |
10589 | glyph_end = glyph + row->used[TEXT_AREA]; | |
10590 | ||
10591 | /* Glyph for a line end in text. */ | |
10592 | if (glyph == glyph_end && glyph->charpos > 0) | |
10593 | ++glyph_end; | |
10594 | ||
10595 | if (glyph < glyph_end) | |
bd66d1ba | 10596 | { |
5f5c8ee5 GM |
10597 | fprintf (stderr, " Glyph Type Pos W Code C Face LR\n"); |
10598 | prev_had_glyphs_p = 1; | |
bd66d1ba RS |
10599 | } |
10600 | else | |
5f5c8ee5 GM |
10601 | prev_had_glyphs_p = 0; |
10602 | ||
10603 | while (glyph < glyph_end) | |
f7b4b63a | 10604 | { |
5f5c8ee5 GM |
10605 | if (glyph->type == CHAR_GLYPH) |
10606 | { | |
10607 | fprintf (stderr, | |
10608 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10609 | glyph - row->glyphs[TEXT_AREA], | |
10610 | 'C', | |
10611 | glyph->charpos, | |
10612 | glyph->pixel_width, | |
43d120d8 KH |
10613 | glyph->u.ch, |
10614 | (glyph->u.ch < 0x80 && glyph->u.ch >= ' ' | |
10615 | ? glyph->u.ch | |
5f5c8ee5 | 10616 | : '.'), |
43d120d8 | 10617 | glyph->face_id, |
5f5c8ee5 GM |
10618 | glyph->left_box_line_p, |
10619 | glyph->right_box_line_p); | |
10620 | } | |
10621 | else if (glyph->type == STRETCH_GLYPH) | |
10622 | { | |
10623 | fprintf (stderr, | |
10624 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10625 | glyph - row->glyphs[TEXT_AREA], | |
10626 | 'S', | |
10627 | glyph->charpos, | |
10628 | glyph->pixel_width, | |
10629 | 0, | |
10630 | '.', | |
bcdda9a4 | 10631 | glyph->face_id, |
5f5c8ee5 GM |
10632 | glyph->left_box_line_p, |
10633 | glyph->right_box_line_p); | |
10634 | } | |
10635 | else if (glyph->type == IMAGE_GLYPH) | |
10636 | { | |
10637 | fprintf (stderr, | |
10638 | " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n", | |
10639 | glyph - row->glyphs[TEXT_AREA], | |
10640 | 'I', | |
10641 | glyph->charpos, | |
10642 | glyph->pixel_width, | |
43d120d8 | 10643 | glyph->u.img_id, |
5f5c8ee5 | 10644 | '.', |
bcdda9a4 | 10645 | glyph->face_id, |
5f5c8ee5 GM |
10646 | glyph->left_box_line_p, |
10647 | glyph->right_box_line_p); | |
10648 | } | |
10649 | ++glyph; | |
f7b4b63a | 10650 | } |
f4faa47c | 10651 | } |
5f5c8ee5 | 10652 | } |
f4faa47c | 10653 | |
a2889657 | 10654 | |
5f5c8ee5 GM |
10655 | DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix, |
10656 | Sdump_glyph_matrix, 0, 1, "p", | |
10657 | "Dump the current matrix of the selected window to stderr.\n\ | |
10658 | Shows contents of glyph row structures. With non-nil optional\n\ | |
10659 | parameter WITH-GLYPHS-P, dump glyphs as well.") | |
10660 | (with_glyphs_p) | |
10661 | { | |
10662 | struct window *w = XWINDOW (selected_window); | |
10663 | struct buffer *buffer = XBUFFER (w->buffer); | |
10664 | ||
10665 | fprintf (stderr, "PT = %d, BEGV = %d. ZV = %d\n", | |
10666 | BUF_PT (buffer), BUF_BEGV (buffer), BUF_ZV (buffer)); | |
10667 | fprintf (stderr, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n", | |
10668 | w->cursor.x, w->cursor.y, w->cursor.hpos, w->cursor.vpos); | |
10669 | fprintf (stderr, "=============================================\n"); | |
10670 | dump_glyph_matrix (w->current_matrix, !NILP (with_glyphs_p)); | |
10671 | return Qnil; | |
10672 | } | |
1c2250c2 | 10673 | |
1fca3fae | 10674 | |
5f5c8ee5 GM |
10675 | DEFUN ("dump-glyph-row", Fdump_glyph_row, Sdump_glyph_row, 1, 1, "", |
10676 | "Dump glyph row ROW to stderr.") | |
10677 | (row) | |
10678 | Lisp_Object row; | |
10679 | { | |
10680 | CHECK_NUMBER (row, 0); | |
10681 | dump_glyph_row (XWINDOW (selected_window)->current_matrix, XINT (row), 1); | |
10682 | return Qnil; | |
10683 | } | |
1fca3fae | 10684 | |
67481ae5 | 10685 | |
e037b9ec | 10686 | DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row, Sdump_tool_bar_row, |
5f5c8ee5 GM |
10687 | 0, 0, "", "") |
10688 | () | |
10689 | { | |
886bd6f2 GM |
10690 | struct frame *sf = SELECTED_FRAME (); |
10691 | struct glyph_matrix *m = (XWINDOW (sf->tool_bar_window) | |
5f5c8ee5 GM |
10692 | ->current_matrix); |
10693 | dump_glyph_row (m, 0, 1); | |
10694 | return Qnil; | |
10695 | } | |
ca26e1c8 | 10696 | |
0f9c0ff0 | 10697 | |
5f5c8ee5 GM |
10698 | DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle, |
10699 | Strace_redisplay_toggle, 0, 0, "", | |
10700 | "Toggle tracing of redisplay.") | |
10701 | () | |
10702 | { | |
10703 | trace_redisplay_p = !trace_redisplay_p; | |
10704 | return Qnil; | |
10705 | } | |
bf9249e3 GM |
10706 | |
10707 | ||
10708 | DEFUN ("trace-to-stderr", Ftrace_to_stderr, Strace_to_stderr, 1, 1, "", | |
10709 | "Print STRING to stderr.") | |
10710 | (string) | |
10711 | Lisp_Object string; | |
10712 | { | |
10713 | CHECK_STRING (string, 0); | |
10714 | fprintf (stderr, "%s", XSTRING (string)->data); | |
10715 | return Qnil; | |
10716 | } | |
5f5c8ee5 GM |
10717 | |
10718 | #endif /* GLYPH_DEBUG */ | |
ca26e1c8 | 10719 | |
ca26e1c8 | 10720 | |
5f5c8ee5 GM |
10721 | \f |
10722 | /*********************************************************************** | |
10723 | Building Desired Matrix Rows | |
10724 | ***********************************************************************/ | |
a2889657 | 10725 | |
5f5c8ee5 GM |
10726 | /* Return a temporary glyph row holding the glyphs of an overlay |
10727 | arrow. Only used for non-window-redisplay windows. */ | |
ca26e1c8 | 10728 | |
5f5c8ee5 GM |
10729 | static struct glyph_row * |
10730 | get_overlay_arrow_glyph_row (w) | |
10731 | struct window *w; | |
10732 | { | |
10733 | struct frame *f = XFRAME (WINDOW_FRAME (w)); | |
10734 | struct buffer *buffer = XBUFFER (w->buffer); | |
10735 | struct buffer *old = current_buffer; | |
10736 | unsigned char *arrow_string = XSTRING (Voverlay_arrow_string)->data; | |
10737 | int arrow_len = XSTRING (Voverlay_arrow_string)->size; | |
10738 | unsigned char *arrow_end = arrow_string + arrow_len; | |
10739 | unsigned char *p; | |
10740 | struct it it; | |
10741 | int multibyte_p; | |
10742 | int n_glyphs_before; | |
10743 | ||
10744 | set_buffer_temp (buffer); | |
10745 | init_iterator (&it, w, -1, -1, &scratch_glyph_row, DEFAULT_FACE_ID); | |
10746 | it.glyph_row->used[TEXT_AREA] = 0; | |
10747 | SET_TEXT_POS (it.position, 0, 0); | |
10748 | ||
10749 | multibyte_p = !NILP (buffer->enable_multibyte_characters); | |
10750 | p = arrow_string; | |
10751 | while (p < arrow_end) | |
10752 | { | |
10753 | Lisp_Object face, ilisp; | |
10754 | ||
10755 | /* Get the next character. */ | |
10756 | if (multibyte_p) | |
4fdb80f2 | 10757 | it.c = string_char_and_length (p, arrow_len, &it.len); |
5f5c8ee5 GM |
10758 | else |
10759 | it.c = *p, it.len = 1; | |
10760 | p += it.len; | |
10761 | ||
10762 | /* Get its face. */ | |
10763 | XSETFASTINT (ilisp, p - arrow_string); | |
10764 | face = Fget_text_property (ilisp, Qface, Voverlay_arrow_string); | |
10765 | it.face_id = compute_char_face (f, it.c, face); | |
10766 | ||
10767 | /* Compute its width, get its glyphs. */ | |
10768 | n_glyphs_before = it.glyph_row->used[TEXT_AREA]; | |
337042a9 | 10769 | SET_TEXT_POS (it.position, -1, -1); |
5f5c8ee5 GM |
10770 | PRODUCE_GLYPHS (&it); |
10771 | ||
10772 | /* If this character doesn't fit any more in the line, we have | |
10773 | to remove some glyphs. */ | |
10774 | if (it.current_x > it.last_visible_x) | |
10775 | { | |
10776 | it.glyph_row->used[TEXT_AREA] = n_glyphs_before; | |
10777 | break; | |
10778 | } | |
10779 | } | |
10780 | ||
10781 | set_buffer_temp (old); | |
10782 | return it.glyph_row; | |
10783 | } | |
ca26e1c8 | 10784 | |
b0a0fbda | 10785 | |
5f5c8ee5 GM |
10786 | /* Insert truncation glyphs at the start of IT->glyph_row. Truncation |
10787 | glyphs are only inserted for terminal frames since we can't really | |
10788 | win with truncation glyphs when partially visible glyphs are | |
10789 | involved. Which glyphs to insert is determined by | |
10790 | produce_special_glyphs. */ | |
67481ae5 | 10791 | |
5f5c8ee5 GM |
10792 | static void |
10793 | insert_left_trunc_glyphs (it) | |
10794 | struct it *it; | |
10795 | { | |
10796 | struct it truncate_it; | |
10797 | struct glyph *from, *end, *to, *toend; | |
10798 | ||
10799 | xassert (!FRAME_WINDOW_P (it->f)); | |
10800 | ||
10801 | /* Get the truncation glyphs. */ | |
10802 | truncate_it = *it; | |
10803 | truncate_it.charset = -1; | |
10804 | truncate_it.current_x = 0; | |
10805 | truncate_it.face_id = DEFAULT_FACE_ID; | |
10806 | truncate_it.glyph_row = &scratch_glyph_row; | |
10807 | truncate_it.glyph_row->used[TEXT_AREA] = 0; | |
10808 | CHARPOS (truncate_it.position) = BYTEPOS (truncate_it.position) = -1; | |
10809 | truncate_it.object = 0; | |
10810 | produce_special_glyphs (&truncate_it, IT_TRUNCATION); | |
10811 | ||
10812 | /* Overwrite glyphs from IT with truncation glyphs. */ | |
10813 | from = truncate_it.glyph_row->glyphs[TEXT_AREA]; | |
10814 | end = from + truncate_it.glyph_row->used[TEXT_AREA]; | |
10815 | to = it->glyph_row->glyphs[TEXT_AREA]; | |
10816 | toend = to + it->glyph_row->used[TEXT_AREA]; | |
10817 | ||
10818 | while (from < end) | |
10819 | *to++ = *from++; | |
10820 | ||
10821 | /* There may be padding glyphs left over. Remove them. */ | |
10822 | from = to; | |
10823 | while (from < toend && CHAR_GLYPH_PADDING_P (*from)) | |
10824 | ++from; | |
10825 | while (from < toend) | |
10826 | *to++ = *from++; | |
10827 | ||
10828 | it->glyph_row->used[TEXT_AREA] = to - it->glyph_row->glyphs[TEXT_AREA]; | |
10829 | } | |
e0bfbde6 | 10830 | |
e0bfbde6 | 10831 | |
5f5c8ee5 | 10832 | /* Compute the pixel height and width of IT->glyph_row. |
9c49d3d7 | 10833 | |
5f5c8ee5 GM |
10834 | Most of the time, ascent and height of a display line will be equal |
10835 | to the max_ascent and max_height values of the display iterator | |
10836 | structure. This is not the case if | |
67481ae5 | 10837 | |
5f5c8ee5 GM |
10838 | 1. We hit ZV without displaying anything. In this case, max_ascent |
10839 | and max_height will be zero. | |
1c9241f5 | 10840 | |
5f5c8ee5 GM |
10841 | 2. We have some glyphs that don't contribute to the line height. |
10842 | (The glyph row flag contributes_to_line_height_p is for future | |
10843 | pixmap extensions). | |
f6fd109b | 10844 | |
5f5c8ee5 GM |
10845 | The first case is easily covered by using default values because in |
10846 | these cases, the line height does not really matter, except that it | |
10847 | must not be zero. */ | |
67481ae5 | 10848 | |
5f5c8ee5 GM |
10849 | static void |
10850 | compute_line_metrics (it) | |
10851 | struct it *it; | |
10852 | { | |
10853 | struct glyph_row *row = it->glyph_row; | |
10854 | int area, i; | |
1c2250c2 | 10855 | |
5f5c8ee5 GM |
10856 | if (FRAME_WINDOW_P (it->f)) |
10857 | { | |
045dee35 | 10858 | int i, header_line_height; |
1c2250c2 | 10859 | |
5f5c8ee5 GM |
10860 | /* The line may consist of one space only, that was added to |
10861 | place the cursor on it. If so, the row's height hasn't been | |
10862 | computed yet. */ | |
10863 | if (row->height == 0) | |
10864 | { | |
10865 | if (it->max_ascent + it->max_descent == 0) | |
312246d1 | 10866 | it->max_descent = it->max_phys_descent = CANON_Y_UNIT (it->f); |
5f5c8ee5 GM |
10867 | row->ascent = it->max_ascent; |
10868 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
10869 | row->phys_ascent = it->max_phys_ascent; |
10870 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
10871 | } |
10872 | ||
10873 | /* Compute the width of this line. */ | |
10874 | row->pixel_width = row->x; | |
10875 | for (i = 0; i < row->used[TEXT_AREA]; ++i) | |
10876 | row->pixel_width += row->glyphs[TEXT_AREA][i].pixel_width; | |
10877 | ||
10878 | xassert (row->pixel_width >= 0); | |
10879 | xassert (row->ascent >= 0 && row->height > 0); | |
10880 | ||
312246d1 GM |
10881 | row->overlapping_p = (MATRIX_ROW_OVERLAPS_SUCC_P (row) |
10882 | || MATRIX_ROW_OVERLAPS_PRED_P (row)); | |
10883 | ||
10884 | /* If first line's physical ascent is larger than its logical | |
10885 | ascent, use the physical ascent, and make the row taller. | |
10886 | This makes accented characters fully visible. */ | |
10887 | if (row == it->w->desired_matrix->rows | |
10888 | && row->phys_ascent > row->ascent) | |
10889 | { | |
10890 | row->height += row->phys_ascent - row->ascent; | |
10891 | row->ascent = row->phys_ascent; | |
10892 | } | |
10893 | ||
5f5c8ee5 GM |
10894 | /* Compute how much of the line is visible. */ |
10895 | row->visible_height = row->height; | |
10896 | ||
045dee35 GM |
10897 | header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it->w); |
10898 | if (row->y < header_line_height) | |
10899 | row->visible_height -= header_line_height - row->y; | |
5f5c8ee5 GM |
10900 | else |
10901 | { | |
10902 | int max_y = WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it->w); | |
10903 | if (row->y + row->height > max_y) | |
10904 | row->visible_height -= row->y + row->height - max_y; | |
10905 | } | |
10906 | } | |
10907 | else | |
10908 | { | |
10909 | row->pixel_width = row->used[TEXT_AREA]; | |
312246d1 GM |
10910 | row->ascent = row->phys_ascent = 0; |
10911 | row->height = row->phys_height = row->visible_height = 1; | |
5f5c8ee5 | 10912 | } |
67481ae5 | 10913 | |
5f5c8ee5 GM |
10914 | /* Compute a hash code for this row. */ |
10915 | row->hash = 0; | |
10916 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
10917 | for (i = 0; i < row->used[area]; ++i) | |
10918 | row->hash = ((((row->hash << 4) + (row->hash >> 24)) & 0x0fffffff) | |
10919 | + row->glyphs[area][i].u.val | |
43d120d8 KH |
10920 | + row->glyphs[area][i].face_id |
10921 | + row->glyphs[area][i].padding_p | |
5f5c8ee5 | 10922 | + (row->glyphs[area][i].type << 2)); |
a2889657 | 10923 | |
5f5c8ee5 | 10924 | it->max_ascent = it->max_descent = 0; |
312246d1 | 10925 | it->max_phys_ascent = it->max_phys_descent = 0; |
5f5c8ee5 | 10926 | } |
12adba34 | 10927 | |
ca26e1c8 | 10928 | |
5f5c8ee5 GM |
10929 | /* Append one space to the glyph row of iterator IT if doing a |
10930 | window-based redisplay. DEFAULT_FACE_P non-zero means let the | |
10931 | space have the default face, otherwise let it have the same face as | |
80c6cb1f | 10932 | IT->face_id. Value is non-zero if a space was added. |
c6e89d6c GM |
10933 | |
10934 | This function is called to make sure that there is always one glyph | |
10935 | at the end of a glyph row that the cursor can be set on under | |
10936 | window-systems. (If there weren't such a glyph we would not know | |
10937 | how wide and tall a box cursor should be displayed). | |
10938 | ||
10939 | At the same time this space let's a nicely handle clearing to the | |
10940 | end of the line if the row ends in italic text. */ | |
ca26e1c8 | 10941 | |
80c6cb1f | 10942 | static int |
5f5c8ee5 GM |
10943 | append_space (it, default_face_p) |
10944 | struct it *it; | |
10945 | int default_face_p; | |
10946 | { | |
10947 | if (FRAME_WINDOW_P (it->f)) | |
10948 | { | |
10949 | int n = it->glyph_row->used[TEXT_AREA]; | |
ca26e1c8 | 10950 | |
5f5c8ee5 GM |
10951 | if (it->glyph_row->glyphs[TEXT_AREA] + n |
10952 | < it->glyph_row->glyphs[1 + TEXT_AREA]) | |
a2889657 | 10953 | { |
5f5c8ee5 GM |
10954 | /* Save some values that must not be changed. */ |
10955 | int saved_x = it->current_x; | |
10956 | struct text_pos saved_pos; | |
10957 | int saved_what = it->what; | |
10958 | int saved_face_id = it->face_id; | |
10959 | int saved_charset = it->charset; | |
10960 | Lisp_Object saved_object; | |
10961 | ||
10962 | saved_object = it->object; | |
10963 | saved_pos = it->position; | |
10964 | ||
10965 | it->what = IT_CHARACTER; | |
10966 | bzero (&it->position, sizeof it->position); | |
10967 | it->object = 0; | |
10968 | it->c = ' '; | |
10969 | it->len = 1; | |
10970 | it->charset = CHARSET_ASCII; | |
10971 | ||
10972 | if (default_face_p) | |
10973 | it->face_id = DEFAULT_FACE_ID; | |
10974 | if (it->multibyte_p) | |
10975 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, CHARSET_ASCII); | |
10976 | else | |
10977 | it->face_id = FACE_FOR_CHARSET (it->f, it->face_id, -1); | |
1842fc1a | 10978 | |
5f5c8ee5 GM |
10979 | PRODUCE_GLYPHS (it); |
10980 | ||
10981 | it->current_x = saved_x; | |
10982 | it->object = saved_object; | |
10983 | it->position = saved_pos; | |
10984 | it->what = saved_what; | |
10985 | it->face_id = saved_face_id; | |
10986 | it->charset = saved_charset; | |
80c6cb1f | 10987 | return 1; |
5f5c8ee5 GM |
10988 | } |
10989 | } | |
80c6cb1f GM |
10990 | |
10991 | return 0; | |
5f5c8ee5 | 10992 | } |
12adba34 | 10993 | |
1842fc1a | 10994 | |
5f5c8ee5 GM |
10995 | /* Extend the face of the last glyph in the text area of IT->glyph_row |
10996 | to the end of the display line. Called from display_line. | |
10997 | If the glyph row is empty, add a space glyph to it so that we | |
10998 | know the face to draw. Set the glyph row flag fill_line_p. */ | |
10999 | ||
11000 | static void | |
11001 | extend_face_to_end_of_line (it) | |
11002 | struct it *it; | |
11003 | { | |
11004 | struct face *face; | |
11005 | struct frame *f = it->f; | |
1842fc1a | 11006 | |
5f5c8ee5 GM |
11007 | /* If line is already filled, do nothing. */ |
11008 | if (it->current_x >= it->last_visible_x) | |
11009 | return; | |
11010 | ||
11011 | /* Face extension extends the background and box of IT->face_id | |
11012 | to the end of the line. If the background equals the background | |
11013 | of the frame, we haven't to do anything. */ | |
11014 | face = FACE_FROM_ID (f, it->face_id); | |
11015 | if (FRAME_WINDOW_P (f) | |
11016 | && face->box == FACE_NO_BOX | |
11017 | && face->background == FRAME_BACKGROUND_PIXEL (f) | |
11018 | && !face->stipple) | |
11019 | return; | |
1842fc1a | 11020 | |
5f5c8ee5 GM |
11021 | /* Set the glyph row flag indicating that the face of the last glyph |
11022 | in the text area has to be drawn to the end of the text area. */ | |
11023 | it->glyph_row->fill_line_p = 1; | |
545e04f6 | 11024 | |
5f5c8ee5 GM |
11025 | /* If current charset of IT is not ASCII, make sure we have the |
11026 | ASCII face. This will be automatically undone the next time | |
11027 | get_next_display_element returns a character from a different | |
11028 | charset. Note that the charset will always be ASCII in unibyte | |
11029 | text. */ | |
11030 | if (it->charset != CHARSET_ASCII) | |
11031 | { | |
11032 | it->charset = CHARSET_ASCII; | |
11033 | it->face_id = FACE_FOR_CHARSET (f, it->face_id, CHARSET_ASCII); | |
11034 | } | |
545e04f6 | 11035 | |
5f5c8ee5 GM |
11036 | if (FRAME_WINDOW_P (f)) |
11037 | { | |
11038 | /* If the row is empty, add a space with the current face of IT, | |
11039 | so that we know which face to draw. */ | |
11040 | if (it->glyph_row->used[TEXT_AREA] == 0) | |
a2889657 | 11041 | { |
5f5c8ee5 | 11042 | it->glyph_row->glyphs[TEXT_AREA][0] = space_glyph; |
43d120d8 | 11043 | it->glyph_row->glyphs[TEXT_AREA][0].face_id = it->face_id; |
5f5c8ee5 | 11044 | it->glyph_row->used[TEXT_AREA] = 1; |
a2889657 | 11045 | } |
5f5c8ee5 GM |
11046 | } |
11047 | else | |
11048 | { | |
11049 | /* Save some values that must not be changed. */ | |
11050 | int saved_x = it->current_x; | |
11051 | struct text_pos saved_pos; | |
11052 | Lisp_Object saved_object; | |
11053 | int saved_what = it->what; | |
11054 | ||
11055 | saved_object = it->object; | |
11056 | saved_pos = it->position; | |
11057 | ||
11058 | it->what = IT_CHARACTER; | |
11059 | bzero (&it->position, sizeof it->position); | |
11060 | it->object = 0; | |
11061 | it->c = ' '; | |
11062 | it->len = 1; | |
11063 | ||
11064 | PRODUCE_GLYPHS (it); | |
11065 | ||
11066 | while (it->current_x <= it->last_visible_x) | |
11067 | PRODUCE_GLYPHS (it); | |
11068 | ||
11069 | /* Don't count these blanks really. It would let us insert a left | |
11070 | truncation glyph below and make us set the cursor on them, maybe. */ | |
11071 | it->current_x = saved_x; | |
11072 | it->object = saved_object; | |
11073 | it->position = saved_pos; | |
11074 | it->what = saved_what; | |
11075 | } | |
11076 | } | |
12adba34 | 11077 | |
545e04f6 | 11078 | |
5f5c8ee5 GM |
11079 | /* Value is non-zero if text starting at CHARPOS in current_buffer is |
11080 | trailing whitespace. */ | |
1c9241f5 | 11081 | |
5f5c8ee5 GM |
11082 | static int |
11083 | trailing_whitespace_p (charpos) | |
11084 | int charpos; | |
11085 | { | |
11086 | int bytepos = CHAR_TO_BYTE (charpos); | |
11087 | int c = 0; | |
7bbe686f | 11088 | |
5f5c8ee5 GM |
11089 | while (bytepos < ZV_BYTE |
11090 | && (c = FETCH_CHAR (bytepos), | |
11091 | c == ' ' || c == '\t')) | |
11092 | ++bytepos; | |
0d09d1e6 | 11093 | |
8f897821 GM |
11094 | if (bytepos >= ZV_BYTE || c == '\n' || c == '\r') |
11095 | { | |
11096 | if (bytepos != PT_BYTE) | |
11097 | return 1; | |
11098 | } | |
11099 | return 0; | |
5f5c8ee5 | 11100 | } |
31b24551 | 11101 | |
545e04f6 | 11102 | |
5f5c8ee5 | 11103 | /* Highlight trailing whitespace, if any, in ROW. */ |
545e04f6 | 11104 | |
5f5c8ee5 GM |
11105 | void |
11106 | highlight_trailing_whitespace (f, row) | |
11107 | struct frame *f; | |
11108 | struct glyph_row *row; | |
11109 | { | |
11110 | int used = row->used[TEXT_AREA]; | |
11111 | ||
11112 | if (used) | |
11113 | { | |
11114 | struct glyph *start = row->glyphs[TEXT_AREA]; | |
11115 | struct glyph *glyph = start + used - 1; | |
11116 | ||
11117 | /* Skip over the space glyph inserted to display the | |
11118 | cursor at the end of a line. */ | |
11119 | if (glyph->type == CHAR_GLYPH | |
43d120d8 | 11120 | && glyph->u.ch == ' ' |
5f5c8ee5 GM |
11121 | && glyph->object == 0) |
11122 | --glyph; | |
11123 | ||
11124 | /* If last glyph is a space or stretch, and it's trailing | |
11125 | whitespace, set the face of all trailing whitespace glyphs in | |
11126 | IT->glyph_row to `trailing-whitespace'. */ | |
11127 | if (glyph >= start | |
11128 | && BUFFERP (glyph->object) | |
11129 | && (glyph->type == STRETCH_GLYPH | |
11130 | || (glyph->type == CHAR_GLYPH | |
43d120d8 | 11131 | && glyph->u.ch == ' ')) |
5f5c8ee5 | 11132 | && trailing_whitespace_p (glyph->charpos)) |
545e04f6 | 11133 | { |
5f5c8ee5 GM |
11134 | int face_id = lookup_named_face (f, Qtrailing_whitespace, |
11135 | CHARSET_ASCII); | |
11136 | ||
11137 | while (glyph >= start | |
11138 | && BUFFERP (glyph->object) | |
11139 | && (glyph->type == STRETCH_GLYPH | |
11140 | || (glyph->type == CHAR_GLYPH | |
43d120d8 KH |
11141 | && glyph->u.ch == ' '))) |
11142 | (glyph--)->face_id = face_id; | |
545e04f6 | 11143 | } |
a2889657 | 11144 | } |
5f5c8ee5 | 11145 | } |
a2889657 | 11146 | |
5fcbb24d | 11147 | |
5f5c8ee5 GM |
11148 | /* Construct the glyph row IT->glyph_row in the desired matrix of |
11149 | IT->w from text at the current position of IT. See dispextern.h | |
11150 | for an overview of struct it. Value is non-zero if | |
11151 | IT->glyph_row displays text, as opposed to a line displaying ZV | |
11152 | only. */ | |
11153 | ||
11154 | static int | |
11155 | display_line (it) | |
11156 | struct it *it; | |
11157 | { | |
11158 | struct glyph_row *row = it->glyph_row; | |
11159 | ||
11160 | /* We always start displaying at hpos zero even if hscrolled. */ | |
11161 | xassert (it->hpos == 0 && it->current_x == 0); | |
a2889657 | 11162 | |
5f5c8ee5 GM |
11163 | /* We must not display in a row that's not a text row. */ |
11164 | xassert (MATRIX_ROW_VPOS (row, it->w->desired_matrix) | |
11165 | < it->w->desired_matrix->nrows); | |
12adba34 | 11166 | |
5f5c8ee5 GM |
11167 | /* Is IT->w showing the region? */ |
11168 | it->w->region_showing = it->region_beg_charpos > 0 ? Qt : Qnil; | |
12adba34 | 11169 | |
5f5c8ee5 GM |
11170 | /* Clear the result glyph row and enable it. */ |
11171 | prepare_desired_row (row); | |
12adba34 | 11172 | |
5f5c8ee5 GM |
11173 | row->y = it->current_y; |
11174 | row->start = it->current; | |
11175 | row->continuation_lines_width = it->continuation_lines_width; | |
11176 | row->displays_text_p = 1; | |
11177 | ||
11178 | /* Arrange the overlays nicely for our purposes. Usually, we call | |
11179 | display_line on only one line at a time, in which case this | |
11180 | can't really hurt too much, or we call it on lines which appear | |
11181 | one after another in the buffer, in which case all calls to | |
11182 | recenter_overlay_lists but the first will be pretty cheap. */ | |
11183 | recenter_overlay_lists (current_buffer, IT_CHARPOS (*it)); | |
11184 | ||
5f5c8ee5 GM |
11185 | /* Move over display elements that are not visible because we are |
11186 | hscrolled. This may stop at an x-position < IT->first_visible_x | |
11187 | if the first glyph is partially visible or if we hit a line end. */ | |
11188 | if (it->current_x < it->first_visible_x) | |
11189 | move_it_in_display_line_to (it, ZV, it->first_visible_x, | |
11190 | MOVE_TO_POS | MOVE_TO_X); | |
11191 | ||
11192 | /* Get the initial row height. This is either the height of the | |
11193 | text hscrolled, if there is any, or zero. */ | |
11194 | row->ascent = it->max_ascent; | |
11195 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
11196 | row->phys_ascent = it->max_phys_ascent; |
11197 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
5f5c8ee5 GM |
11198 | |
11199 | /* Loop generating characters. The loop is left with IT on the next | |
11200 | character to display. */ | |
11201 | while (1) | |
11202 | { | |
11203 | int n_glyphs_before, hpos_before, x_before; | |
11204 | int x, i, nglyphs; | |
11205 | ||
11206 | /* Retrieve the next thing to display. Value is zero if end of | |
11207 | buffer reached. */ | |
11208 | if (!get_next_display_element (it)) | |
11209 | { | |
11210 | /* Maybe add a space at the end of this line that is used to | |
1b335865 GM |
11211 | display the cursor there under X. Set the charpos of the |
11212 | first glyph of blank lines not corresponding to any text | |
11213 | to -1. */ | |
11214 | if ((append_space (it, 1) && row->used[TEXT_AREA] == 1) | |
11215 | || row->used[TEXT_AREA] == 0) | |
a2889657 | 11216 | { |
5f5c8ee5 GM |
11217 | row->glyphs[TEXT_AREA]->charpos = -1; |
11218 | row->displays_text_p = 0; | |
11219 | ||
11220 | if (!NILP (XBUFFER (it->w->buffer)->indicate_empty_lines)) | |
11221 | row->indicate_empty_line_p = 1; | |
a2889657 | 11222 | } |
5f5c8ee5 GM |
11223 | |
11224 | it->continuation_lines_width = 0; | |
11225 | row->ends_at_zv_p = 1; | |
11226 | break; | |
a2889657 | 11227 | } |
a2889657 | 11228 | |
5f5c8ee5 GM |
11229 | /* Now, get the metrics of what we want to display. This also |
11230 | generates glyphs in `row' (which is IT->glyph_row). */ | |
11231 | n_glyphs_before = row->used[TEXT_AREA]; | |
11232 | x = it->current_x; | |
11233 | PRODUCE_GLYPHS (it); | |
a2889657 | 11234 | |
5f5c8ee5 GM |
11235 | /* If this display element was in marginal areas, continue with |
11236 | the next one. */ | |
11237 | if (it->area != TEXT_AREA) | |
a2889657 | 11238 | { |
5f5c8ee5 GM |
11239 | row->ascent = max (row->ascent, it->max_ascent); |
11240 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11241 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11242 | row->phys_height = max (row->phys_height, | |
11243 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11244 | set_iterator_to_next (it); |
11245 | continue; | |
11246 | } | |
5936754e | 11247 | |
5f5c8ee5 GM |
11248 | /* Does the display element fit on the line? If we truncate |
11249 | lines, we should draw past the right edge of the window. If | |
11250 | we don't truncate, we want to stop so that we can display the | |
11251 | continuation glyph before the right margin. If lines are | |
11252 | continued, there are two possible strategies for characters | |
11253 | resulting in more than 1 glyph (e.g. tabs): Display as many | |
11254 | glyphs as possible in this line and leave the rest for the | |
11255 | continuation line, or display the whole element in the next | |
11256 | line. Original redisplay did the former, so we do it also. */ | |
11257 | nglyphs = row->used[TEXT_AREA] - n_glyphs_before; | |
11258 | hpos_before = it->hpos; | |
11259 | x_before = x; | |
11260 | ||
11261 | if (nglyphs == 1 | |
11262 | && it->current_x < it->last_visible_x) | |
11263 | { | |
11264 | ++it->hpos; | |
11265 | row->ascent = max (row->ascent, it->max_ascent); | |
11266 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11267 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11268 | row->phys_height = max (row->phys_height, | |
11269 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11270 | if (it->current_x - it->pixel_width < it->first_visible_x) |
11271 | row->x = x - it->first_visible_x; | |
11272 | } | |
11273 | else | |
11274 | { | |
11275 | int new_x; | |
11276 | struct glyph *glyph; | |
11277 | ||
11278 | for (i = 0; i < nglyphs; ++i, x = new_x) | |
b5bbc9a5 | 11279 | { |
5f5c8ee5 GM |
11280 | glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
11281 | new_x = x + glyph->pixel_width; | |
11282 | ||
11283 | if (/* Lines are continued. */ | |
11284 | !it->truncate_lines_p | |
11285 | && (/* Glyph doesn't fit on the line. */ | |
11286 | new_x > it->last_visible_x | |
11287 | /* Or it fits exactly on a window system frame. */ | |
11288 | || (new_x == it->last_visible_x | |
11289 | && FRAME_WINDOW_P (it->f)))) | |
a2889657 | 11290 | { |
5f5c8ee5 GM |
11291 | /* End of a continued line. */ |
11292 | ||
11293 | if (it->hpos == 0 | |
11294 | || (new_x == it->last_visible_x | |
11295 | && FRAME_WINDOW_P (it->f))) | |
11296 | { | |
11297 | /* Current glyph fits exactly on the line. We | |
11298 | must continue the line because we can't draw | |
11299 | the cursor after the glyph. */ | |
11300 | row->continued_p = 1; | |
11301 | it->current_x = new_x; | |
11302 | it->continuation_lines_width += new_x; | |
11303 | ++it->hpos; | |
11304 | if (i == nglyphs - 1) | |
11305 | set_iterator_to_next (it); | |
11306 | } | |
11307 | else | |
5936754e | 11308 | { |
5f5c8ee5 GM |
11309 | /* Display element draws past the right edge of |
11310 | the window. Restore positions to values | |
11311 | before the element. The next line starts | |
11312 | with current_x before the glyph that could | |
11313 | not be displayed, so that TAB works right. */ | |
11314 | row->used[TEXT_AREA] = n_glyphs_before + i; | |
11315 | ||
11316 | /* Display continuation glyphs. */ | |
11317 | if (!FRAME_WINDOW_P (it->f)) | |
11318 | produce_special_glyphs (it, IT_CONTINUATION); | |
11319 | row->continued_p = 1; | |
11320 | ||
11321 | it->current_x = x; | |
11322 | it->continuation_lines_width += x; | |
5936754e | 11323 | } |
5f5c8ee5 GM |
11324 | break; |
11325 | } | |
11326 | else if (new_x > it->first_visible_x) | |
11327 | { | |
11328 | /* Increment number of glyphs actually displayed. */ | |
11329 | ++it->hpos; | |
11330 | ||
11331 | if (x < it->first_visible_x) | |
11332 | /* Glyph is partially visible, i.e. row starts at | |
11333 | negative X position. */ | |
11334 | row->x = x - it->first_visible_x; | |
11335 | } | |
11336 | else | |
11337 | { | |
11338 | /* Glyph is completely off the left margin of the | |
11339 | window. This should not happen because of the | |
11340 | move_it_in_display_line at the start of | |
11341 | this function. */ | |
11342 | abort (); | |
a2889657 | 11343 | } |
a2889657 | 11344 | } |
5f5c8ee5 GM |
11345 | |
11346 | row->ascent = max (row->ascent, it->max_ascent); | |
11347 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
11348 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
11349 | row->phys_height = max (row->phys_height, | |
11350 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
11351 | |
11352 | /* End of this display line if row is continued. */ | |
11353 | if (row->continued_p) | |
11354 | break; | |
a2889657 | 11355 | } |
a2889657 | 11356 | |
5f5c8ee5 GM |
11357 | /* Is this a line end? If yes, we're also done, after making |
11358 | sure that a non-default face is extended up to the right | |
11359 | margin of the window. */ | |
11360 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
1c9241f5 | 11361 | { |
5f5c8ee5 GM |
11362 | int used_before = row->used[TEXT_AREA]; |
11363 | ||
11364 | /* Add a space at the end of the line that is used to | |
11365 | display the cursor there. */ | |
11366 | append_space (it, 0); | |
11367 | ||
11368 | /* Extend the face to the end of the line. */ | |
11369 | extend_face_to_end_of_line (it); | |
11370 | ||
11371 | /* Make sure we have the position. */ | |
11372 | if (used_before == 0) | |
11373 | row->glyphs[TEXT_AREA]->charpos = CHARPOS (it->position); | |
11374 | ||
11375 | /* Consume the line end. This skips over invisible lines. */ | |
11376 | set_iterator_to_next (it); | |
11377 | it->continuation_lines_width = 0; | |
11378 | break; | |
1c9241f5 | 11379 | } |
a2889657 | 11380 | |
5f5c8ee5 GM |
11381 | /* Proceed with next display element. Note that this skips |
11382 | over lines invisible because of selective display. */ | |
11383 | set_iterator_to_next (it); | |
b1d1124b | 11384 | |
5f5c8ee5 GM |
11385 | /* If we truncate lines, we are done when the last displayed |
11386 | glyphs reach past the right margin of the window. */ | |
11387 | if (it->truncate_lines_p | |
11388 | && (FRAME_WINDOW_P (it->f) | |
11389 | ? (it->current_x >= it->last_visible_x) | |
11390 | : (it->current_x > it->last_visible_x))) | |
75d13c64 | 11391 | { |
5f5c8ee5 GM |
11392 | /* Maybe add truncation glyphs. */ |
11393 | if (!FRAME_WINDOW_P (it->f)) | |
11394 | { | |
11395 | --it->glyph_row->used[TEXT_AREA]; | |
11396 | produce_special_glyphs (it, IT_TRUNCATION); | |
11397 | } | |
11398 | ||
11399 | row->truncated_on_right_p = 1; | |
11400 | it->continuation_lines_width = 0; | |
312246d1 | 11401 | reseat_at_next_visible_line_start (it, 0); |
5f5c8ee5 GM |
11402 | row->ends_at_zv_p = FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n'; |
11403 | it->hpos = hpos_before; | |
11404 | it->current_x = x_before; | |
11405 | break; | |
75d13c64 | 11406 | } |
a2889657 | 11407 | } |
a2889657 | 11408 | |
5f5c8ee5 GM |
11409 | /* If line is not empty and hscrolled, maybe insert truncation glyphs |
11410 | at the left window margin. */ | |
11411 | if (it->first_visible_x | |
11412 | && IT_CHARPOS (*it) != MATRIX_ROW_START_CHARPOS (row)) | |
11413 | { | |
11414 | if (!FRAME_WINDOW_P (it->f)) | |
11415 | insert_left_trunc_glyphs (it); | |
11416 | row->truncated_on_left_p = 1; | |
11417 | } | |
a2889657 | 11418 | |
5f5c8ee5 GM |
11419 | /* If the start of this line is the overlay arrow-position, then |
11420 | mark this glyph row as the one containing the overlay arrow. | |
11421 | This is clearly a mess with variable size fonts. It would be | |
11422 | better to let it be displayed like cursors under X. */ | |
e24c997d | 11423 | if (MARKERP (Voverlay_arrow_position) |
a2889657 | 11424 | && current_buffer == XMARKER (Voverlay_arrow_position)->buffer |
5f5c8ee5 GM |
11425 | && (MATRIX_ROW_START_CHARPOS (row) |
11426 | == marker_position (Voverlay_arrow_position)) | |
e24c997d | 11427 | && STRINGP (Voverlay_arrow_string) |
a2889657 JB |
11428 | && ! overlay_arrow_seen) |
11429 | { | |
5f5c8ee5 GM |
11430 | /* Overlay arrow in window redisplay is a bitmap. */ |
11431 | if (!FRAME_WINDOW_P (it->f)) | |
c4628384 | 11432 | { |
5f5c8ee5 GM |
11433 | struct glyph_row *arrow_row = get_overlay_arrow_glyph_row (it->w); |
11434 | struct glyph *glyph = arrow_row->glyphs[TEXT_AREA]; | |
11435 | struct glyph *arrow_end = glyph + arrow_row->used[TEXT_AREA]; | |
11436 | struct glyph *p = row->glyphs[TEXT_AREA]; | |
11437 | struct glyph *p2, *end; | |
11438 | ||
11439 | /* Copy the arrow glyphs. */ | |
11440 | while (glyph < arrow_end) | |
11441 | *p++ = *glyph++; | |
11442 | ||
11443 | /* Throw away padding glyphs. */ | |
11444 | p2 = p; | |
11445 | end = row->glyphs[TEXT_AREA] + row->used[TEXT_AREA]; | |
11446 | while (p2 < end && CHAR_GLYPH_PADDING_P (*p2)) | |
11447 | ++p2; | |
11448 | if (p2 > p) | |
212e4f87 | 11449 | { |
5f5c8ee5 GM |
11450 | while (p2 < end) |
11451 | *p++ = *p2++; | |
11452 | row->used[TEXT_AREA] = p2 - row->glyphs[TEXT_AREA]; | |
c4628384 | 11453 | } |
c4628384 | 11454 | } |
5f5c8ee5 | 11455 | |
a2889657 | 11456 | overlay_arrow_seen = 1; |
5f5c8ee5 | 11457 | row->overlay_arrow_p = 1; |
a2889657 JB |
11458 | } |
11459 | ||
5f5c8ee5 GM |
11460 | /* Compute pixel dimensions of this line. */ |
11461 | compute_line_metrics (it); | |
11462 | ||
11463 | /* Remember the position at which this line ends. */ | |
11464 | row->end = it->current; | |
11465 | ||
11466 | /* Maybe set the cursor. If you change this, it's probably a good | |
11467 | idea to also change the code in redisplay_window for cursor | |
11468 | movement in an unchanged window. */ | |
11469 | if (it->w->cursor.vpos < 0 | |
11470 | && PT >= MATRIX_ROW_START_CHARPOS (row) | |
11471 | && MATRIX_ROW_END_CHARPOS (row) >= PT | |
11472 | && !(MATRIX_ROW_END_CHARPOS (row) == PT | |
11473 | && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row) | |
11474 | || !row->ends_at_zv_p))) | |
11475 | set_cursor_from_row (it->w, row, it->w->desired_matrix, 0, 0, 0, 0); | |
11476 | ||
11477 | /* Highlight trailing whitespace. */ | |
8f897821 | 11478 | if (!NILP (Vshow_trailing_whitespace)) |
5f5c8ee5 GM |
11479 | highlight_trailing_whitespace (it->f, it->glyph_row); |
11480 | ||
11481 | /* Prepare for the next line. This line starts horizontally at (X | |
11482 | HPOS) = (0 0). Vertical positions are incremented. As a | |
11483 | convenience for the caller, IT->glyph_row is set to the next | |
11484 | row to be used. */ | |
11485 | it->current_x = it->hpos = 0; | |
11486 | it->current_y += row->height; | |
11487 | ++it->vpos; | |
11488 | ++it->glyph_row; | |
11489 | return row->displays_text_p; | |
a2889657 | 11490 | } |
5f5c8ee5 GM |
11491 | |
11492 | ||
a2889657 | 11493 | \f |
5f5c8ee5 GM |
11494 | /*********************************************************************** |
11495 | Menu Bar | |
11496 | ***********************************************************************/ | |
11497 | ||
11498 | /* Redisplay the menu bar in the frame for window W. | |
11499 | ||
11500 | The menu bar of X frames that don't have X toolkit support is | |
11501 | displayed in a special window W->frame->menu_bar_window. | |
11502 | ||
11503 | The menu bar of terminal frames is treated specially as far as | |
11504 | glyph matrices are concerned. Menu bar lines are not part of | |
11505 | windows, so the update is done directly on the frame matrix rows | |
11506 | for the menu bar. */ | |
7ce2c095 RS |
11507 | |
11508 | static void | |
11509 | display_menu_bar (w) | |
11510 | struct window *w; | |
11511 | { | |
5f5c8ee5 GM |
11512 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
11513 | struct it it; | |
11514 | Lisp_Object items; | |
8351baf2 | 11515 | int i; |
7ce2c095 | 11516 | |
5f5c8ee5 | 11517 | /* Don't do all this for graphical frames. */ |
dc937613 | 11518 | #ifdef HAVE_NTGUI |
d129c4c2 KH |
11519 | if (!NILP (Vwindow_system)) |
11520 | return; | |
dc937613 | 11521 | #endif |
dc937613 | 11522 | #ifdef USE_X_TOOLKIT |
d3413a53 | 11523 | if (FRAME_X_P (f)) |
7ce2c095 | 11524 | return; |
5f5c8ee5 GM |
11525 | #endif |
11526 | ||
11527 | #ifdef USE_X_TOOLKIT | |
11528 | xassert (!FRAME_WINDOW_P (f)); | |
52377a47 | 11529 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, MENU_FACE_ID); |
5f5c8ee5 GM |
11530 | it.first_visible_x = 0; |
11531 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11532 | #else /* not USE_X_TOOLKIT */ | |
11533 | if (FRAME_WINDOW_P (f)) | |
11534 | { | |
11535 | /* Menu bar lines are displayed in the desired matrix of the | |
11536 | dummy window menu_bar_window. */ | |
11537 | struct window *menu_w; | |
11538 | xassert (WINDOWP (f->menu_bar_window)); | |
11539 | menu_w = XWINDOW (f->menu_bar_window); | |
11540 | init_iterator (&it, menu_w, -1, -1, menu_w->desired_matrix->rows, | |
52377a47 | 11541 | MENU_FACE_ID); |
5f5c8ee5 GM |
11542 | it.first_visible_x = 0; |
11543 | it.last_visible_x = FRAME_WINDOW_WIDTH (f) * CANON_X_UNIT (f); | |
11544 | } | |
11545 | else | |
11546 | { | |
11547 | /* This is a TTY frame, i.e. character hpos/vpos are used as | |
11548 | pixel x/y. */ | |
11549 | init_iterator (&it, w, -1, -1, f->desired_matrix->rows, | |
52377a47 | 11550 | MENU_FACE_ID); |
5f5c8ee5 GM |
11551 | it.first_visible_x = 0; |
11552 | it.last_visible_x = FRAME_WIDTH (f); | |
11553 | } | |
11554 | #endif /* not USE_X_TOOLKIT */ | |
11555 | ||
11556 | /* Clear all rows of the menu bar. */ | |
11557 | for (i = 0; i < FRAME_MENU_BAR_LINES (f); ++i) | |
11558 | { | |
11559 | struct glyph_row *row = it.glyph_row + i; | |
11560 | clear_glyph_row (row); | |
11561 | row->enabled_p = 1; | |
11562 | row->full_width_p = 1; | |
11563 | } | |
7ce2c095 | 11564 | |
5f5c8ee5 GM |
11565 | /* Make the first line of the menu bar appear in reverse video. */ |
11566 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
7ce2c095 | 11567 | |
5f5c8ee5 GM |
11568 | /* Display all items of the menu bar. */ |
11569 | items = FRAME_MENU_BAR_ITEMS (it.f); | |
469937ac | 11570 | for (i = 0; i < XVECTOR (items)->size; i += 4) |
7ce2c095 | 11571 | { |
5f5c8ee5 GM |
11572 | Lisp_Object string; |
11573 | ||
11574 | /* Stop at nil string. */ | |
8351baf2 RS |
11575 | string = XVECTOR (items)->contents[i + 1]; |
11576 | if (NILP (string)) | |
11577 | break; | |
2d66ad19 | 11578 | |
5f5c8ee5 GM |
11579 | /* Remember where item was displayed. */ |
11580 | XSETFASTINT (XVECTOR (items)->contents[i + 3], it.hpos); | |
7ce2c095 | 11581 | |
5f5c8ee5 GM |
11582 | /* Display the item, pad with one space. */ |
11583 | if (it.current_x < it.last_visible_x) | |
11584 | display_string (NULL, string, Qnil, 0, 0, &it, | |
11585 | XSTRING (string)->size + 1, 0, 0, -1); | |
7ce2c095 RS |
11586 | } |
11587 | ||
2d66ad19 | 11588 | /* Fill out the line with spaces. */ |
5f5c8ee5 GM |
11589 | if (it.current_x < it.last_visible_x) |
11590 | display_string ("", Qnil, Qnil, 0, 0, &it, -1, 0, 0, -1); | |
db6f348c | 11591 | |
5f5c8ee5 GM |
11592 | /* Compute the total height of the lines. */ |
11593 | compute_line_metrics (&it); | |
7ce2c095 | 11594 | } |
5f5c8ee5 GM |
11595 | |
11596 | ||
7ce2c095 | 11597 | \f |
5f5c8ee5 GM |
11598 | /*********************************************************************** |
11599 | Mode Line | |
11600 | ***********************************************************************/ | |
11601 | ||
11602 | /* Display the mode and/or top line of window W. */ | |
a2889657 JB |
11603 | |
11604 | static void | |
5f5c8ee5 | 11605 | display_mode_lines (w) |
a2889657 JB |
11606 | struct window *w; |
11607 | { | |
5f5c8ee5 | 11608 | /* These will be set while the mode line specs are processed. */ |
aa6d10fa | 11609 | line_number_displayed = 0; |
155ef550 | 11610 | w->column_number_displayed = Qnil; |
aa6d10fa | 11611 | |
5f5c8ee5 | 11612 | if (WINDOW_WANTS_MODELINE_P (w)) |
045dee35 GM |
11613 | display_mode_line (w, MODE_LINE_FACE_ID, |
11614 | current_buffer->mode_line_format); | |
5f5c8ee5 | 11615 | |
045dee35 GM |
11616 | if (WINDOW_WANTS_HEADER_LINE_P (w)) |
11617 | display_mode_line (w, HEADER_LINE_FACE_ID, | |
11618 | current_buffer->header_line_format); | |
5f5c8ee5 | 11619 | } |
03b294dc | 11620 | |
03b294dc | 11621 | |
5f5c8ee5 | 11622 | /* Display mode or top line of window W. FACE_ID specifies which line |
045dee35 | 11623 | to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID. |
5f5c8ee5 | 11624 | FORMAT is the mode line format to display. */ |
03b294dc | 11625 | |
5f5c8ee5 GM |
11626 | static void |
11627 | display_mode_line (w, face_id, format) | |
11628 | struct window *w; | |
11629 | enum face_id face_id; | |
11630 | Lisp_Object format; | |
11631 | { | |
11632 | struct it it; | |
11633 | struct face *face; | |
03b294dc | 11634 | |
5f5c8ee5 GM |
11635 | init_iterator (&it, w, -1, -1, NULL, face_id); |
11636 | prepare_desired_row (it.glyph_row); | |
11637 | ||
11638 | /* Temporarily make frame's keyboard the current kboard so that | |
11639 | kboard-local variables in the mode_line_format will get the right | |
11640 | values. */ | |
11641 | push_frame_kboard (it.f); | |
11642 | display_mode_element (&it, 0, 0, 0, format); | |
11643 | pop_frame_kboard (); | |
a2889657 | 11644 | |
5f5c8ee5 GM |
11645 | /* Fill up with spaces. */ |
11646 | display_string (" ", Qnil, Qnil, 0, 0, &it, 10000, -1, -1, 0); | |
11647 | ||
11648 | compute_line_metrics (&it); | |
11649 | it.glyph_row->full_width_p = 1; | |
11650 | it.glyph_row->mode_line_p = 1; | |
11651 | it.glyph_row->inverse_p = mode_line_inverse_video != 0; | |
11652 | it.glyph_row->continued_p = 0; | |
11653 | it.glyph_row->truncated_on_left_p = 0; | |
11654 | it.glyph_row->truncated_on_right_p = 0; | |
11655 | ||
11656 | /* Make a 3D mode-line have a shadow at its right end. */ | |
11657 | face = FACE_FROM_ID (it.f, face_id); | |
11658 | extend_face_to_end_of_line (&it); | |
11659 | if (face->box != FACE_NO_BOX) | |
d7eb09a0 | 11660 | { |
5f5c8ee5 GM |
11661 | struct glyph *last = (it.glyph_row->glyphs[TEXT_AREA] |
11662 | + it.glyph_row->used[TEXT_AREA] - 1); | |
11663 | last->right_box_line_p = 1; | |
d7eb09a0 | 11664 | } |
a2889657 JB |
11665 | } |
11666 | ||
a2889657 | 11667 | |
5f5c8ee5 GM |
11668 | /* Contribute ELT to the mode line for window IT->w. How it |
11669 | translates into text depends on its data type. | |
a2889657 | 11670 | |
5f5c8ee5 | 11671 | IT describes the display environment in which we display, as usual. |
a2889657 JB |
11672 | |
11673 | DEPTH is the depth in recursion. It is used to prevent | |
11674 | infinite recursion here. | |
11675 | ||
5f5c8ee5 GM |
11676 | FIELD_WIDTH is the number of characters the display of ELT should |
11677 | occupy in the mode line, and PRECISION is the maximum number of | |
11678 | characters to display from ELT's representation. See | |
11679 | display_string for details. * | |
a2889657 | 11680 | |
5f5c8ee5 | 11681 | Returns the hpos of the end of the text generated by ELT. */ |
a2889657 JB |
11682 | |
11683 | static int | |
5f5c8ee5 GM |
11684 | display_mode_element (it, depth, field_width, precision, elt) |
11685 | struct it *it; | |
a2889657 | 11686 | int depth; |
5f5c8ee5 GM |
11687 | int field_width, precision; |
11688 | Lisp_Object elt; | |
a2889657 | 11689 | { |
5f5c8ee5 GM |
11690 | int n = 0, field, prec; |
11691 | ||
a2889657 JB |
11692 | tail_recurse: |
11693 | if (depth > 10) | |
11694 | goto invalid; | |
11695 | ||
11696 | depth++; | |
11697 | ||
0220c518 | 11698 | switch (SWITCH_ENUM_CAST (XTYPE (elt))) |
a2889657 JB |
11699 | { |
11700 | case Lisp_String: | |
11701 | { | |
11702 | /* A string: output it and check for %-constructs within it. */ | |
5f5c8ee5 GM |
11703 | unsigned char c; |
11704 | unsigned char *this = XSTRING (elt)->data; | |
11705 | unsigned char *lisp_string = this; | |
11706 | ||
11707 | while ((precision <= 0 || n < precision) | |
11708 | && *this | |
11709 | && (frame_title_ptr | |
11710 | || it->current_x < it->last_visible_x)) | |
a2889657 JB |
11711 | { |
11712 | unsigned char *last = this; | |
5f5c8ee5 GM |
11713 | |
11714 | /* Advance to end of string or next format specifier. */ | |
a2889657 JB |
11715 | while ((c = *this++) != '\0' && c != '%') |
11716 | ; | |
5f5c8ee5 | 11717 | |
a2889657 JB |
11718 | if (this - 1 != last) |
11719 | { | |
5f5c8ee5 GM |
11720 | /* Output to end of string or up to '%'. Field width |
11721 | is length of string. Don't output more than | |
11722 | PRECISION allows us. */ | |
11723 | prec = --this - last; | |
11724 | if (precision > 0 && prec > precision - n) | |
11725 | prec = precision - n; | |
11726 | ||
d39b6696 | 11727 | if (frame_title_ptr) |
5f5c8ee5 | 11728 | n += store_frame_title (last, prec, prec); |
d39b6696 | 11729 | else |
5f5c8ee5 GM |
11730 | n += display_string (NULL, elt, Qnil, 0, last - lisp_string, |
11731 | it, 0, prec, 0, -1); | |
a2889657 JB |
11732 | } |
11733 | else /* c == '%' */ | |
11734 | { | |
5f5c8ee5 GM |
11735 | unsigned char *percent_position = this; |
11736 | ||
11737 | /* Get the specified minimum width. Zero means | |
11738 | don't pad. */ | |
11739 | field = 0; | |
a2889657 | 11740 | while ((c = *this++) >= '0' && c <= '9') |
5f5c8ee5 | 11741 | field = field * 10 + c - '0'; |
a2889657 | 11742 | |
5f5c8ee5 GM |
11743 | /* Don't pad beyond the total padding allowed. */ |
11744 | if (field_width - n > 0 && field > field_width - n) | |
11745 | field = field_width - n; | |
a2889657 | 11746 | |
5f5c8ee5 GM |
11747 | /* Note that either PRECISION <= 0 or N < PRECISION. */ |
11748 | prec = precision - n; | |
11749 | ||
a2889657 | 11750 | if (c == 'M') |
5f5c8ee5 GM |
11751 | n += display_mode_element (it, depth, field, prec, |
11752 | Vglobal_mode_string); | |
a2889657 | 11753 | else if (c != 0) |
d39b6696 | 11754 | { |
5f5c8ee5 GM |
11755 | unsigned char *spec |
11756 | = decode_mode_spec (it->w, c, field, prec); | |
11757 | ||
d39b6696 | 11758 | if (frame_title_ptr) |
5f5c8ee5 | 11759 | n += store_frame_title (spec, field, prec); |
d39b6696 | 11760 | else |
5f5c8ee5 GM |
11761 | { |
11762 | int nglyphs_before | |
11763 | = it->glyph_row->used[TEXT_AREA]; | |
11764 | int charpos | |
11765 | = percent_position - XSTRING (elt)->data; | |
11766 | int nwritten | |
11767 | = display_string (spec, Qnil, elt, charpos, 0, it, | |
11768 | field, prec, 0, -1); | |
11769 | ||
11770 | /* Assign to the glyphs written above the | |
11771 | string where the `%x' came from, position | |
11772 | of the `%'. */ | |
11773 | if (nwritten > 0) | |
11774 | { | |
11775 | struct glyph *glyph | |
11776 | = (it->glyph_row->glyphs[TEXT_AREA] | |
11777 | + nglyphs_before); | |
11778 | int i; | |
11779 | ||
11780 | for (i = 0; i < nwritten; ++i) | |
11781 | { | |
11782 | glyph[i].object = elt; | |
11783 | glyph[i].charpos = charpos; | |
11784 | } | |
11785 | ||
11786 | n += nwritten; | |
11787 | } | |
11788 | } | |
d39b6696 | 11789 | } |
a2889657 JB |
11790 | } |
11791 | } | |
11792 | } | |
11793 | break; | |
11794 | ||
11795 | case Lisp_Symbol: | |
11796 | /* A symbol: process the value of the symbol recursively | |
11797 | as if it appeared here directly. Avoid error if symbol void. | |
11798 | Special case: if value of symbol is a string, output the string | |
11799 | literally. */ | |
11800 | { | |
11801 | register Lisp_Object tem; | |
11802 | tem = Fboundp (elt); | |
265a9e55 | 11803 | if (!NILP (tem)) |
a2889657 JB |
11804 | { |
11805 | tem = Fsymbol_value (elt); | |
11806 | /* If value is a string, output that string literally: | |
11807 | don't check for % within it. */ | |
e24c997d | 11808 | if (STRINGP (tem)) |
d39b6696 | 11809 | { |
5f5c8ee5 GM |
11810 | prec = XSTRING (tem)->size; |
11811 | if (precision > 0 && prec > precision - n) | |
11812 | prec = precision - n; | |
d39b6696 | 11813 | if (frame_title_ptr) |
5f5c8ee5 | 11814 | n += store_frame_title (XSTRING (tem)->data, -1, prec); |
d39b6696 | 11815 | else |
5f5c8ee5 GM |
11816 | n += display_string (NULL, tem, Qnil, 0, 0, it, |
11817 | 0, prec, 0, -1); | |
d39b6696 | 11818 | } |
a2889657 | 11819 | else if (!EQ (tem, elt)) |
5f5c8ee5 GM |
11820 | { |
11821 | /* Give up right away for nil or t. */ | |
11822 | elt = tem; | |
11823 | goto tail_recurse; | |
11824 | } | |
a2889657 JB |
11825 | } |
11826 | } | |
11827 | break; | |
11828 | ||
11829 | case Lisp_Cons: | |
11830 | { | |
11831 | register Lisp_Object car, tem; | |
11832 | ||
11833 | /* A cons cell: three distinct cases. | |
11834 | If first element is a string or a cons, process all the elements | |
11835 | and effectively concatenate them. | |
11836 | If first element is a negative number, truncate displaying cdr to | |
11837 | at most that many characters. If positive, pad (with spaces) | |
11838 | to at least that many characters. | |
11839 | If first element is a symbol, process the cadr or caddr recursively | |
11840 | according to whether the symbol's value is non-nil or nil. */ | |
9472f927 | 11841 | car = XCAR (elt); |
5f5c8ee5 GM |
11842 | if (EQ (car, QCeval) && CONSP (XCDR (elt))) |
11843 | { | |
11844 | /* An element of the form (:eval FORM) means evaluate FORM | |
11845 | and use the result as mode line elements. */ | |
11846 | struct gcpro gcpro1; | |
11847 | Lisp_Object spec; | |
11848 | ||
11849 | spec = eval_form (XCAR (XCDR (elt))); | |
11850 | GCPRO1 (spec); | |
11851 | n += display_mode_element (it, depth, field_width - n, | |
11852 | precision - n, spec); | |
11853 | UNGCPRO; | |
11854 | } | |
11855 | else if (SYMBOLP (car)) | |
a2889657 JB |
11856 | { |
11857 | tem = Fboundp (car); | |
9472f927 | 11858 | elt = XCDR (elt); |
e24c997d | 11859 | if (!CONSP (elt)) |
a2889657 JB |
11860 | goto invalid; |
11861 | /* elt is now the cdr, and we know it is a cons cell. | |
11862 | Use its car if CAR has a non-nil value. */ | |
265a9e55 | 11863 | if (!NILP (tem)) |
a2889657 JB |
11864 | { |
11865 | tem = Fsymbol_value (car); | |
265a9e55 | 11866 | if (!NILP (tem)) |
9472f927 GM |
11867 | { |
11868 | elt = XCAR (elt); | |
11869 | goto tail_recurse; | |
11870 | } | |
a2889657 JB |
11871 | } |
11872 | /* Symbol's value is nil (or symbol is unbound) | |
11873 | Get the cddr of the original list | |
11874 | and if possible find the caddr and use that. */ | |
9472f927 | 11875 | elt = XCDR (elt); |
265a9e55 | 11876 | if (NILP (elt)) |
a2889657 | 11877 | break; |
e24c997d | 11878 | else if (!CONSP (elt)) |
a2889657 | 11879 | goto invalid; |
9472f927 | 11880 | elt = XCAR (elt); |
a2889657 JB |
11881 | goto tail_recurse; |
11882 | } | |
e24c997d | 11883 | else if (INTEGERP (car)) |
a2889657 JB |
11884 | { |
11885 | register int lim = XINT (car); | |
9472f927 | 11886 | elt = XCDR (elt); |
a2889657 | 11887 | if (lim < 0) |
5f5c8ee5 GM |
11888 | { |
11889 | /* Negative int means reduce maximum width. */ | |
11890 | if (precision <= 0) | |
11891 | precision = -lim; | |
11892 | else | |
11893 | precision = min (precision, -lim); | |
11894 | } | |
a2889657 JB |
11895 | else if (lim > 0) |
11896 | { | |
11897 | /* Padding specified. Don't let it be more than | |
11898 | current maximum. */ | |
5f5c8ee5 GM |
11899 | if (precision > 0) |
11900 | lim = min (precision, lim); | |
11901 | ||
a2889657 JB |
11902 | /* If that's more padding than already wanted, queue it. |
11903 | But don't reduce padding already specified even if | |
11904 | that is beyond the current truncation point. */ | |
5f5c8ee5 | 11905 | field_width = max (lim, field_width); |
a2889657 JB |
11906 | } |
11907 | goto tail_recurse; | |
11908 | } | |
e24c997d | 11909 | else if (STRINGP (car) || CONSP (car)) |
a2889657 JB |
11910 | { |
11911 | register int limit = 50; | |
5f5c8ee5 GM |
11912 | /* Limit is to protect against circular lists. */ |
11913 | while (CONSP (elt) | |
11914 | && --limit > 0 | |
11915 | && (precision <= 0 || n < precision)) | |
a2889657 | 11916 | { |
5f5c8ee5 | 11917 | n += display_mode_element (it, depth, field_width - n, |
9472f927 GM |
11918 | precision - n, XCAR (elt)); |
11919 | elt = XCDR (elt); | |
a2889657 JB |
11920 | } |
11921 | } | |
11922 | } | |
11923 | break; | |
11924 | ||
11925 | default: | |
11926 | invalid: | |
d39b6696 | 11927 | if (frame_title_ptr) |
5f5c8ee5 | 11928 | n += store_frame_title ("*invalid*", 0, precision - n); |
d39b6696 | 11929 | else |
5f5c8ee5 GM |
11930 | n += display_string ("*invalid*", Qnil, Qnil, 0, 0, it, 0, |
11931 | precision - n, 0, 0); | |
11932 | return n; | |
a2889657 JB |
11933 | } |
11934 | ||
5f5c8ee5 GM |
11935 | /* Pad to FIELD_WIDTH. */ |
11936 | if (field_width > 0 && n < field_width) | |
11937 | { | |
11938 | if (frame_title_ptr) | |
11939 | n += store_frame_title ("", field_width - n, 0); | |
11940 | else | |
11941 | n += display_string ("", Qnil, Qnil, 0, 0, it, field_width - n, | |
11942 | 0, 0, 0); | |
11943 | } | |
11944 | ||
11945 | return n; | |
a2889657 | 11946 | } |
5f5c8ee5 GM |
11947 | |
11948 | ||
766525bc RS |
11949 | /* Write a null-terminated, right justified decimal representation of |
11950 | the positive integer D to BUF using a minimal field width WIDTH. */ | |
11951 | ||
11952 | static void | |
11953 | pint2str (buf, width, d) | |
11954 | register char *buf; | |
11955 | register int width; | |
11956 | register int d; | |
11957 | { | |
11958 | register char *p = buf; | |
11959 | ||
11960 | if (d <= 0) | |
5f5c8ee5 | 11961 | *p++ = '0'; |
766525bc | 11962 | else |
5f5c8ee5 | 11963 | { |
766525bc | 11964 | while (d > 0) |
5f5c8ee5 | 11965 | { |
766525bc RS |
11966 | *p++ = d % 10 + '0'; |
11967 | d /= 10; | |
5f5c8ee5 GM |
11968 | } |
11969 | } | |
11970 | ||
11971 | for (width -= (int) (p - buf); width > 0; --width) | |
11972 | *p++ = ' '; | |
766525bc RS |
11973 | *p-- = '\0'; |
11974 | while (p > buf) | |
5f5c8ee5 | 11975 | { |
766525bc RS |
11976 | d = *buf; |
11977 | *buf++ = *p; | |
11978 | *p-- = d; | |
5f5c8ee5 | 11979 | } |
766525bc RS |
11980 | } |
11981 | ||
5f5c8ee5 | 11982 | /* Set a mnemonic character for coding_system (Lisp symbol) in BUF. |
1c9241f5 KH |
11983 | If EOL_FLAG is 1, set also a mnemonic character for end-of-line |
11984 | type of CODING_SYSTEM. Return updated pointer into BUF. */ | |
11985 | ||
6693a99a | 11986 | static unsigned char invalid_eol_type[] = "(*invalid*)"; |
d24715e8 | 11987 | |
1c9241f5 KH |
11988 | static char * |
11989 | decode_mode_spec_coding (coding_system, buf, eol_flag) | |
11990 | Lisp_Object coding_system; | |
11991 | register char *buf; | |
11992 | int eol_flag; | |
11993 | { | |
1e1078d6 | 11994 | Lisp_Object val; |
916848d8 | 11995 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
302f2b38 EZ |
11996 | unsigned char *eol_str; |
11997 | int eol_str_len; | |
11998 | /* The EOL conversion we are using. */ | |
11999 | Lisp_Object eoltype; | |
1e1078d6 | 12000 | |
4a09dee0 | 12001 | val = Fget (coding_system, Qcoding_system); |
1c9241f5 | 12002 | |
4a09dee0 | 12003 | if (!VECTORP (val)) /* Not yet decided. */ |
1c9241f5 | 12004 | { |
916848d8 RS |
12005 | if (multibyte) |
12006 | *buf++ = '-'; | |
21e989e3 | 12007 | if (eol_flag) |
302f2b38 | 12008 | eoltype = eol_mnemonic_undecided; |
1e1078d6 | 12009 | /* Don't mention EOL conversion if it isn't decided. */ |
1c9241f5 KH |
12010 | } |
12011 | else | |
12012 | { | |
1e1078d6 RS |
12013 | Lisp_Object eolvalue; |
12014 | ||
12015 | eolvalue = Fget (coding_system, Qeol_type); | |
12016 | ||
916848d8 RS |
12017 | if (multibyte) |
12018 | *buf++ = XFASTINT (XVECTOR (val)->contents[1]); | |
12019 | ||
1c9241f5 KH |
12020 | if (eol_flag) |
12021 | { | |
1e1078d6 RS |
12022 | /* The EOL conversion that is normal on this system. */ |
12023 | ||
12024 | if (NILP (eolvalue)) /* Not yet decided. */ | |
12025 | eoltype = eol_mnemonic_undecided; | |
12026 | else if (VECTORP (eolvalue)) /* Not yet decided. */ | |
12027 | eoltype = eol_mnemonic_undecided; | |
12028 | else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */ | |
12029 | eoltype = (XFASTINT (eolvalue) == 0 | |
12030 | ? eol_mnemonic_unix | |
12031 | : (XFASTINT (eolvalue) == 1 | |
12032 | ? eol_mnemonic_dos : eol_mnemonic_mac)); | |
302f2b38 EZ |
12033 | } |
12034 | } | |
5f5c8ee5 | 12035 | |
302f2b38 EZ |
12036 | if (eol_flag) |
12037 | { | |
12038 | /* Mention the EOL conversion if it is not the usual one. */ | |
12039 | if (STRINGP (eoltype)) | |
12040 | { | |
12041 | eol_str = XSTRING (eoltype)->data; | |
12042 | eol_str_len = XSTRING (eoltype)->size; | |
12043 | } | |
f30b3499 KH |
12044 | else if (INTEGERP (eoltype) |
12045 | && CHAR_VALID_P (XINT (eoltype), 0)) | |
12046 | { | |
4a09dee0 | 12047 | eol_str = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH); |
260a86a0 | 12048 | eol_str_len = CHAR_STRING (XINT (eoltype), eol_str); |
f30b3499 | 12049 | } |
302f2b38 EZ |
12050 | else |
12051 | { | |
12052 | eol_str = invalid_eol_type; | |
12053 | eol_str_len = sizeof (invalid_eol_type) - 1; | |
1c9241f5 | 12054 | } |
f30b3499 | 12055 | bcopy (eol_str, buf, eol_str_len); |
302f2b38 | 12056 | buf += eol_str_len; |
1c9241f5 | 12057 | } |
302f2b38 | 12058 | |
1c9241f5 KH |
12059 | return buf; |
12060 | } | |
12061 | ||
a2889657 | 12062 | /* Return a string for the output of a mode line %-spec for window W, |
5f5c8ee5 GM |
12063 | generated by character C. PRECISION >= 0 means don't return a |
12064 | string longer than that value. FIELD_WIDTH > 0 means pad the | |
12065 | string returned with spaces to that value. */ | |
a2889657 | 12066 | |
11e82b76 JB |
12067 | static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------"; |
12068 | ||
a2889657 | 12069 | static char * |
5f5c8ee5 | 12070 | decode_mode_spec (w, c, field_width, precision) |
a2889657 | 12071 | struct window *w; |
68c45bf0 | 12072 | register int c; |
5f5c8ee5 | 12073 | int field_width, precision; |
a2889657 | 12074 | { |
0b67772d | 12075 | Lisp_Object obj; |
5f5c8ee5 GM |
12076 | struct frame *f = XFRAME (WINDOW_FRAME (w)); |
12077 | char *decode_mode_spec_buf = f->decode_mode_spec_buffer; | |
d39b6696 | 12078 | struct buffer *b = XBUFFER (w->buffer); |
a2889657 | 12079 | |
0b67772d | 12080 | obj = Qnil; |
a2889657 JB |
12081 | |
12082 | switch (c) | |
12083 | { | |
1af9f229 RS |
12084 | case '*': |
12085 | if (!NILP (b->read_only)) | |
12086 | return "%"; | |
12087 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12088 | return "*"; | |
12089 | return "-"; | |
12090 | ||
12091 | case '+': | |
12092 | /* This differs from %* only for a modified read-only buffer. */ | |
12093 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12094 | return "*"; | |
12095 | if (!NILP (b->read_only)) | |
12096 | return "%"; | |
12097 | return "-"; | |
12098 | ||
12099 | case '&': | |
12100 | /* This differs from %* in ignoring read-only-ness. */ | |
12101 | if (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
12102 | return "*"; | |
12103 | return "-"; | |
12104 | ||
12105 | case '%': | |
12106 | return "%"; | |
12107 | ||
12108 | case '[': | |
12109 | { | |
12110 | int i; | |
12111 | char *p; | |
12112 | ||
12113 | if (command_loop_level > 5) | |
12114 | return "[[[... "; | |
12115 | p = decode_mode_spec_buf; | |
12116 | for (i = 0; i < command_loop_level; i++) | |
12117 | *p++ = '['; | |
12118 | *p = 0; | |
12119 | return decode_mode_spec_buf; | |
12120 | } | |
12121 | ||
12122 | case ']': | |
12123 | { | |
12124 | int i; | |
12125 | char *p; | |
12126 | ||
12127 | if (command_loop_level > 5) | |
12128 | return " ...]]]"; | |
12129 | p = decode_mode_spec_buf; | |
12130 | for (i = 0; i < command_loop_level; i++) | |
12131 | *p++ = ']'; | |
12132 | *p = 0; | |
12133 | return decode_mode_spec_buf; | |
12134 | } | |
12135 | ||
12136 | case '-': | |
12137 | { | |
1af9f229 | 12138 | register int i; |
5f5c8ee5 GM |
12139 | |
12140 | /* Let lots_of_dashes be a string of infinite length. */ | |
12141 | if (field_width <= 0 | |
12142 | || field_width > sizeof (lots_of_dashes)) | |
1af9f229 | 12143 | { |
5f5c8ee5 GM |
12144 | for (i = 0; i < FRAME_MESSAGE_BUF_SIZE (f) - 1; ++i) |
12145 | decode_mode_spec_buf[i] = '-'; | |
12146 | decode_mode_spec_buf[i] = '\0'; | |
12147 | return decode_mode_spec_buf; | |
1af9f229 | 12148 | } |
5f5c8ee5 GM |
12149 | else |
12150 | return lots_of_dashes; | |
1af9f229 RS |
12151 | } |
12152 | ||
a2889657 | 12153 | case 'b': |
d39b6696 | 12154 | obj = b->name; |
a2889657 JB |
12155 | break; |
12156 | ||
1af9f229 RS |
12157 | case 'c': |
12158 | { | |
12159 | int col = current_column (); | |
12160 | XSETFASTINT (w->column_number_displayed, col); | |
5f5c8ee5 | 12161 | pint2str (decode_mode_spec_buf, field_width, col); |
1af9f229 RS |
12162 | return decode_mode_spec_buf; |
12163 | } | |
12164 | ||
12165 | case 'F': | |
12166 | /* %F displays the frame name. */ | |
5f5c8ee5 | 12167 | if (!NILP (f->title)) |
95184b48 | 12168 | return (char *) XSTRING (f->title)->data; |
fd8ff63d | 12169 | if (f->explicit_name || ! FRAME_WINDOW_P (f)) |
95184b48 | 12170 | return (char *) XSTRING (f->name)->data; |
9c6da96f | 12171 | return "Emacs"; |
1af9f229 | 12172 | |
a2889657 | 12173 | case 'f': |
d39b6696 | 12174 | obj = b->filename; |
a2889657 JB |
12175 | break; |
12176 | ||
aa6d10fa RS |
12177 | case 'l': |
12178 | { | |
12adba34 RS |
12179 | int startpos = XMARKER (w->start)->charpos; |
12180 | int startpos_byte = marker_byte_position (w->start); | |
12181 | int line, linepos, linepos_byte, topline; | |
aa6d10fa | 12182 | int nlines, junk; |
aa6d10fa RS |
12183 | int height = XFASTINT (w->height); |
12184 | ||
12185 | /* If we decided that this buffer isn't suitable for line numbers, | |
12186 | don't forget that too fast. */ | |
12187 | if (EQ (w->base_line_pos, w->buffer)) | |
766525bc | 12188 | goto no_value; |
5300fd39 RS |
12189 | /* But do forget it, if the window shows a different buffer now. */ |
12190 | else if (BUFFERP (w->base_line_pos)) | |
12191 | w->base_line_pos = Qnil; | |
aa6d10fa RS |
12192 | |
12193 | /* If the buffer is very big, don't waste time. */ | |
d39b6696 | 12194 | if (BUF_ZV (b) - BUF_BEGV (b) > line_number_display_limit) |
aa6d10fa RS |
12195 | { |
12196 | w->base_line_pos = Qnil; | |
12197 | w->base_line_number = Qnil; | |
766525bc | 12198 | goto no_value; |
aa6d10fa RS |
12199 | } |
12200 | ||
12201 | if (!NILP (w->base_line_number) | |
12202 | && !NILP (w->base_line_pos) | |
12adba34 | 12203 | && XFASTINT (w->base_line_pos) <= startpos) |
aa6d10fa RS |
12204 | { |
12205 | line = XFASTINT (w->base_line_number); | |
12206 | linepos = XFASTINT (w->base_line_pos); | |
12adba34 | 12207 | linepos_byte = buf_charpos_to_bytepos (b, linepos); |
aa6d10fa RS |
12208 | } |
12209 | else | |
12210 | { | |
12211 | line = 1; | |
d39b6696 | 12212 | linepos = BUF_BEGV (b); |
12adba34 | 12213 | linepos_byte = BUF_BEGV_BYTE (b); |
aa6d10fa RS |
12214 | } |
12215 | ||
12216 | /* Count lines from base line to window start position. */ | |
12adba34 RS |
12217 | nlines = display_count_lines (linepos, linepos_byte, |
12218 | startpos_byte, | |
12219 | startpos, &junk); | |
aa6d10fa RS |
12220 | |
12221 | topline = nlines + line; | |
12222 | ||
12223 | /* Determine a new base line, if the old one is too close | |
12224 | or too far away, or if we did not have one. | |
12225 | "Too close" means it's plausible a scroll-down would | |
12226 | go back past it. */ | |
d39b6696 | 12227 | if (startpos == BUF_BEGV (b)) |
aa6d10fa | 12228 | { |
c2213350 KH |
12229 | XSETFASTINT (w->base_line_number, topline); |
12230 | XSETFASTINT (w->base_line_pos, BUF_BEGV (b)); | |
aa6d10fa RS |
12231 | } |
12232 | else if (nlines < height + 25 || nlines > height * 3 + 50 | |
d39b6696 | 12233 | || linepos == BUF_BEGV (b)) |
aa6d10fa | 12234 | { |
d39b6696 | 12235 | int limit = BUF_BEGV (b); |
12adba34 | 12236 | int limit_byte = BUF_BEGV_BYTE (b); |
aa6d10fa | 12237 | int position; |
5d121aec | 12238 | int distance = (height * 2 + 30) * line_number_display_limit_width; |
aa6d10fa RS |
12239 | |
12240 | if (startpos - distance > limit) | |
12adba34 RS |
12241 | { |
12242 | limit = startpos - distance; | |
12243 | limit_byte = CHAR_TO_BYTE (limit); | |
12244 | } | |
aa6d10fa | 12245 | |
12adba34 RS |
12246 | nlines = display_count_lines (startpos, startpos_byte, |
12247 | limit_byte, | |
12248 | - (height * 2 + 30), | |
aa6d10fa RS |
12249 | &position); |
12250 | /* If we couldn't find the lines we wanted within | |
5d121aec | 12251 | line_number_display_limit_width chars per line, |
aa6d10fa | 12252 | give up on line numbers for this window. */ |
12adba34 | 12253 | if (position == limit_byte && limit == startpos - distance) |
aa6d10fa RS |
12254 | { |
12255 | w->base_line_pos = w->buffer; | |
12256 | w->base_line_number = Qnil; | |
766525bc | 12257 | goto no_value; |
aa6d10fa RS |
12258 | } |
12259 | ||
c2213350 | 12260 | XSETFASTINT (w->base_line_number, topline - nlines); |
12adba34 | 12261 | XSETFASTINT (w->base_line_pos, BYTE_TO_CHAR (position)); |
aa6d10fa RS |
12262 | } |
12263 | ||
12264 | /* Now count lines from the start pos to point. */ | |
12adba34 RS |
12265 | nlines = display_count_lines (startpos, startpos_byte, |
12266 | PT_BYTE, PT, &junk); | |
aa6d10fa RS |
12267 | |
12268 | /* Record that we did display the line number. */ | |
12269 | line_number_displayed = 1; | |
12270 | ||
12271 | /* Make the string to show. */ | |
5f5c8ee5 | 12272 | pint2str (decode_mode_spec_buf, field_width, topline + nlines); |
aa6d10fa | 12273 | return decode_mode_spec_buf; |
766525bc RS |
12274 | no_value: |
12275 | { | |
12276 | char* p = decode_mode_spec_buf; | |
5f5c8ee5 GM |
12277 | int pad = field_width - 2; |
12278 | while (pad-- > 0) | |
12279 | *p++ = ' '; | |
12280 | *p++ = '?'; | |
12281 | *p = '?'; | |
766525bc RS |
12282 | return decode_mode_spec_buf; |
12283 | } | |
aa6d10fa RS |
12284 | } |
12285 | break; | |
12286 | ||
a2889657 | 12287 | case 'm': |
d39b6696 | 12288 | obj = b->mode_name; |
a2889657 JB |
12289 | break; |
12290 | ||
12291 | case 'n': | |
d39b6696 | 12292 | if (BUF_BEGV (b) > BUF_BEG (b) || BUF_ZV (b) < BUF_Z (b)) |
a2889657 JB |
12293 | return " Narrow"; |
12294 | break; | |
12295 | ||
a2889657 JB |
12296 | case 'p': |
12297 | { | |
12298 | int pos = marker_position (w->start); | |
d39b6696 | 12299 | int total = BUF_ZV (b) - BUF_BEGV (b); |
a2889657 | 12300 | |
d39b6696 | 12301 | if (XFASTINT (w->window_end_pos) <= BUF_Z (b) - BUF_ZV (b)) |
a2889657 | 12302 | { |
d39b6696 | 12303 | if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12304 | return "All"; |
12305 | else | |
12306 | return "Bottom"; | |
12307 | } | |
d39b6696 | 12308 | else if (pos <= BUF_BEGV (b)) |
a2889657 JB |
12309 | return "Top"; |
12310 | else | |
12311 | { | |
3c7d31b9 RS |
12312 | if (total > 1000000) |
12313 | /* Do it differently for a large value, to avoid overflow. */ | |
12314 | total = ((pos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12315 | else | |
12316 | total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
a2889657 JB |
12317 | /* We can't normally display a 3-digit number, |
12318 | so get us a 2-digit number that is close. */ | |
12319 | if (total == 100) | |
12320 | total = 99; | |
12321 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12322 | return decode_mode_spec_buf; | |
12323 | } | |
12324 | } | |
12325 | ||
8ffcb79f RS |
12326 | /* Display percentage of size above the bottom of the screen. */ |
12327 | case 'P': | |
12328 | { | |
12329 | int toppos = marker_position (w->start); | |
d39b6696 KH |
12330 | int botpos = BUF_Z (b) - XFASTINT (w->window_end_pos); |
12331 | int total = BUF_ZV (b) - BUF_BEGV (b); | |
8ffcb79f | 12332 | |
d39b6696 | 12333 | if (botpos >= BUF_ZV (b)) |
8ffcb79f | 12334 | { |
d39b6696 | 12335 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12336 | return "All"; |
12337 | else | |
12338 | return "Bottom"; | |
12339 | } | |
12340 | else | |
12341 | { | |
3c7d31b9 RS |
12342 | if (total > 1000000) |
12343 | /* Do it differently for a large value, to avoid overflow. */ | |
12344 | total = ((botpos - BUF_BEGV (b)) + (total / 100) - 1) / (total / 100); | |
12345 | else | |
12346 | total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total; | |
8ffcb79f RS |
12347 | /* We can't normally display a 3-digit number, |
12348 | so get us a 2-digit number that is close. */ | |
12349 | if (total == 100) | |
12350 | total = 99; | |
d39b6696 | 12351 | if (toppos <= BUF_BEGV (b)) |
8ffcb79f RS |
12352 | sprintf (decode_mode_spec_buf, "Top%2d%%", total); |
12353 | else | |
12354 | sprintf (decode_mode_spec_buf, "%2d%%", total); | |
12355 | return decode_mode_spec_buf; | |
12356 | } | |
12357 | } | |
12358 | ||
1af9f229 RS |
12359 | case 's': |
12360 | /* status of process */ | |
12361 | obj = Fget_buffer_process (w->buffer); | |
12362 | if (NILP (obj)) | |
12363 | return "no process"; | |
12364 | #ifdef subprocesses | |
12365 | obj = Fsymbol_name (Fprocess_status (obj)); | |
12366 | #endif | |
12367 | break; | |
d39b6696 | 12368 | |
1af9f229 RS |
12369 | case 't': /* indicate TEXT or BINARY */ |
12370 | #ifdef MODE_LINE_BINARY_TEXT | |
12371 | return MODE_LINE_BINARY_TEXT (b); | |
12372 | #else | |
12373 | return "T"; | |
12374 | #endif | |
1c9241f5 KH |
12375 | |
12376 | case 'z': | |
12377 | /* coding-system (not including end-of-line format) */ | |
12378 | case 'Z': | |
12379 | /* coding-system (including end-of-line type) */ | |
12380 | { | |
12381 | int eol_flag = (c == 'Z'); | |
539b4d41 | 12382 | char *p = decode_mode_spec_buf; |
1c9241f5 | 12383 | |
d30e754b | 12384 | if (! FRAME_WINDOW_P (f)) |
1c9241f5 | 12385 | { |
11c52c4f RS |
12386 | /* No need to mention EOL here--the terminal never needs |
12387 | to do EOL conversion. */ | |
12388 | p = decode_mode_spec_coding (keyboard_coding.symbol, p, 0); | |
12389 | p = decode_mode_spec_coding (terminal_coding.symbol, p, 0); | |
1c9241f5 | 12390 | } |
f13c925f | 12391 | p = decode_mode_spec_coding (b->buffer_file_coding_system, |
539b4d41 | 12392 | p, eol_flag); |
f13c925f | 12393 | |
11c52c4f | 12394 | #if 0 /* This proves to be annoying; I think we can do without. -- rms. */ |
1c9241f5 KH |
12395 | #ifdef subprocesses |
12396 | obj = Fget_buffer_process (Fcurrent_buffer ()); | |
12397 | if (PROCESSP (obj)) | |
12398 | { | |
12399 | p = decode_mode_spec_coding (XPROCESS (obj)->decode_coding_system, | |
12400 | p, eol_flag); | |
12401 | p = decode_mode_spec_coding (XPROCESS (obj)->encode_coding_system, | |
12402 | p, eol_flag); | |
12403 | } | |
12404 | #endif /* subprocesses */ | |
11c52c4f | 12405 | #endif /* 0 */ |
1c9241f5 KH |
12406 | *p = 0; |
12407 | return decode_mode_spec_buf; | |
12408 | } | |
a2889657 | 12409 | } |
d39b6696 | 12410 | |
e24c997d | 12411 | if (STRINGP (obj)) |
a2889657 JB |
12412 | return (char *) XSTRING (obj)->data; |
12413 | else | |
12414 | return ""; | |
12415 | } | |
5f5c8ee5 GM |
12416 | |
12417 | ||
12adba34 RS |
12418 | /* Count up to COUNT lines starting from START / START_BYTE. |
12419 | But don't go beyond LIMIT_BYTE. | |
12420 | Return the number of lines thus found (always nonnegative). | |
59b49f63 | 12421 | |
12adba34 | 12422 | Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */ |
59b49f63 RS |
12423 | |
12424 | static int | |
12adba34 RS |
12425 | display_count_lines (start, start_byte, limit_byte, count, byte_pos_ptr) |
12426 | int start, start_byte, limit_byte, count; | |
12427 | int *byte_pos_ptr; | |
59b49f63 | 12428 | { |
59b49f63 RS |
12429 | register unsigned char *cursor; |
12430 | unsigned char *base; | |
12431 | ||
12432 | register int ceiling; | |
12433 | register unsigned char *ceiling_addr; | |
12adba34 | 12434 | int orig_count = count; |
59b49f63 RS |
12435 | |
12436 | /* If we are not in selective display mode, | |
12437 | check only for newlines. */ | |
12adba34 RS |
12438 | int selective_display = (!NILP (current_buffer->selective_display) |
12439 | && !INTEGERP (current_buffer->selective_display)); | |
59b49f63 RS |
12440 | |
12441 | if (count > 0) | |
12adba34 RS |
12442 | { |
12443 | while (start_byte < limit_byte) | |
12444 | { | |
12445 | ceiling = BUFFER_CEILING_OF (start_byte); | |
12446 | ceiling = min (limit_byte - 1, ceiling); | |
12447 | ceiling_addr = BYTE_POS_ADDR (ceiling) + 1; | |
12448 | base = (cursor = BYTE_POS_ADDR (start_byte)); | |
12449 | while (1) | |
12450 | { | |
12451 | if (selective_display) | |
12452 | while (*cursor != '\n' && *cursor != 015 && ++cursor != ceiling_addr) | |
12453 | ; | |
12454 | else | |
12455 | while (*cursor != '\n' && ++cursor != ceiling_addr) | |
12456 | ; | |
12457 | ||
12458 | if (cursor != ceiling_addr) | |
12459 | { | |
12460 | if (--count == 0) | |
12461 | { | |
12462 | start_byte += cursor - base + 1; | |
12463 | *byte_pos_ptr = start_byte; | |
12464 | return orig_count; | |
12465 | } | |
12466 | else | |
12467 | if (++cursor == ceiling_addr) | |
12468 | break; | |
12469 | } | |
12470 | else | |
12471 | break; | |
12472 | } | |
12473 | start_byte += cursor - base; | |
12474 | } | |
12475 | } | |
59b49f63 RS |
12476 | else |
12477 | { | |
12adba34 RS |
12478 | while (start_byte > limit_byte) |
12479 | { | |
12480 | ceiling = BUFFER_FLOOR_OF (start_byte - 1); | |
12481 | ceiling = max (limit_byte, ceiling); | |
12482 | ceiling_addr = BYTE_POS_ADDR (ceiling) - 1; | |
12483 | base = (cursor = BYTE_POS_ADDR (start_byte - 1) + 1); | |
59b49f63 RS |
12484 | while (1) |
12485 | { | |
12adba34 RS |
12486 | if (selective_display) |
12487 | while (--cursor != ceiling_addr | |
12488 | && *cursor != '\n' && *cursor != 015) | |
12489 | ; | |
12490 | else | |
12491 | while (--cursor != ceiling_addr && *cursor != '\n') | |
12492 | ; | |
12493 | ||
59b49f63 RS |
12494 | if (cursor != ceiling_addr) |
12495 | { | |
12496 | if (++count == 0) | |
12497 | { | |
12adba34 RS |
12498 | start_byte += cursor - base + 1; |
12499 | *byte_pos_ptr = start_byte; | |
12500 | /* When scanning backwards, we should | |
12501 | not count the newline posterior to which we stop. */ | |
12502 | return - orig_count - 1; | |
59b49f63 RS |
12503 | } |
12504 | } | |
12505 | else | |
12506 | break; | |
12507 | } | |
12adba34 RS |
12508 | /* Here we add 1 to compensate for the last decrement |
12509 | of CURSOR, which took it past the valid range. */ | |
12510 | start_byte += cursor - base + 1; | |
59b49f63 RS |
12511 | } |
12512 | } | |
12513 | ||
12adba34 | 12514 | *byte_pos_ptr = limit_byte; |
aa6d10fa | 12515 | |
12adba34 RS |
12516 | if (count < 0) |
12517 | return - orig_count + count; | |
12518 | return orig_count - count; | |
aa6d10fa | 12519 | |
12adba34 | 12520 | } |
a2889657 | 12521 | |
a2889657 | 12522 | |
5f5c8ee5 GM |
12523 | \f |
12524 | /*********************************************************************** | |
12525 | Displaying strings | |
12526 | ***********************************************************************/ | |
278feba9 | 12527 | |
5f5c8ee5 | 12528 | /* Display a NUL-terminated string, starting with index START. |
a3788d53 | 12529 | |
5f5c8ee5 GM |
12530 | If STRING is non-null, display that C string. Otherwise, the Lisp |
12531 | string LISP_STRING is displayed. | |
a2889657 | 12532 | |
5f5c8ee5 GM |
12533 | If FACE_STRING is not nil, FACE_STRING_POS is a position in |
12534 | FACE_STRING. Display STRING or LISP_STRING with the face at | |
12535 | FACE_STRING_POS in FACE_STRING: | |
a2889657 | 12536 | |
5f5c8ee5 GM |
12537 | Display the string in the environment given by IT, but use the |
12538 | standard display table, temporarily. | |
a3788d53 | 12539 | |
5f5c8ee5 GM |
12540 | FIELD_WIDTH is the minimum number of output glyphs to produce. |
12541 | If STRING has fewer characters than FIELD_WIDTH, pad to the right | |
12542 | with spaces. If STRING has more characters, more than FIELD_WIDTH | |
12543 | glyphs will be produced. FIELD_WIDTH <= 0 means don't pad. | |
12544 | ||
12545 | PRECISION is the maximum number of characters to output from | |
12546 | STRING. PRECISION < 0 means don't truncate the string. | |
a2889657 | 12547 | |
5f5c8ee5 | 12548 | This is roughly equivalent to printf format specifiers: |
a2889657 | 12549 | |
5f5c8ee5 GM |
12550 | FIELD_WIDTH PRECISION PRINTF |
12551 | ---------------------------------------- | |
12552 | -1 -1 %s | |
12553 | -1 10 %.10s | |
12554 | 10 -1 %10s | |
12555 | 20 10 %20.10s | |
a2889657 | 12556 | |
5f5c8ee5 GM |
12557 | MULTIBYTE zero means do not display multibyte chars, > 0 means do |
12558 | display them, and < 0 means obey the current buffer's value of | |
12559 | enable_multibyte_characters. | |
278feba9 | 12560 | |
5f5c8ee5 | 12561 | Value is the number of glyphs produced. */ |
b1d1124b | 12562 | |
5f5c8ee5 GM |
12563 | static int |
12564 | display_string (string, lisp_string, face_string, face_string_pos, | |
12565 | start, it, field_width, precision, max_x, multibyte) | |
12566 | unsigned char *string; | |
12567 | Lisp_Object lisp_string; | |
68c45bf0 PE |
12568 | Lisp_Object face_string; |
12569 | int face_string_pos; | |
5f5c8ee5 GM |
12570 | int start; |
12571 | struct it *it; | |
12572 | int field_width, precision, max_x; | |
12573 | int multibyte; | |
12574 | { | |
12575 | int hpos_at_start = it->hpos; | |
12576 | int saved_face_id = it->face_id; | |
12577 | struct glyph_row *row = it->glyph_row; | |
12578 | ||
12579 | /* Initialize the iterator IT for iteration over STRING beginning | |
12580 | with index START. We assume that IT may be modified here (which | |
12581 | means that display_line has to do something when displaying a | |
12582 | mini-buffer prompt, which it does). */ | |
12583 | reseat_to_string (it, string, lisp_string, start, | |
12584 | precision, field_width, multibyte); | |
12585 | ||
12586 | /* If displaying STRING, set up the face of the iterator | |
12587 | from LISP_STRING, if that's given. */ | |
12588 | if (STRINGP (face_string)) | |
12589 | { | |
12590 | int endptr; | |
12591 | struct face *face; | |
12592 | ||
12593 | it->face_id | |
12594 | = face_at_string_position (it->w, face_string, face_string_pos, | |
12595 | 0, it->region_beg_charpos, | |
12596 | it->region_end_charpos, | |
12597 | &endptr, it->base_face_id); | |
12598 | face = FACE_FROM_ID (it->f, it->face_id); | |
12599 | it->face_box_p = face->box != FACE_NO_BOX; | |
b1d1124b | 12600 | } |
a2889657 | 12601 | |
5f5c8ee5 GM |
12602 | /* Set max_x to the maximum allowed X position. Don't let it go |
12603 | beyond the right edge of the window. */ | |
12604 | if (max_x <= 0) | |
12605 | max_x = it->last_visible_x; | |
12606 | else | |
12607 | max_x = min (max_x, it->last_visible_x); | |
efc63ef0 | 12608 | |
5f5c8ee5 GM |
12609 | /* Skip over display elements that are not visible. because IT->w is |
12610 | hscrolled. */ | |
12611 | if (it->current_x < it->first_visible_x) | |
12612 | move_it_in_display_line_to (it, 100000, it->first_visible_x, | |
12613 | MOVE_TO_POS | MOVE_TO_X); | |
a2889657 | 12614 | |
5f5c8ee5 GM |
12615 | row->ascent = it->max_ascent; |
12616 | row->height = it->max_ascent + it->max_descent; | |
312246d1 GM |
12617 | row->phys_ascent = it->max_phys_ascent; |
12618 | row->phys_height = it->max_phys_ascent + it->max_phys_descent; | |
1c9241f5 | 12619 | |
5f5c8ee5 GM |
12620 | /* This condition is for the case that we are called with current_x |
12621 | past last_visible_x. */ | |
12622 | while (it->current_x < max_x) | |
a2889657 | 12623 | { |
5f5c8ee5 | 12624 | int x_before, x, n_glyphs_before, i, nglyphs; |
1c9241f5 | 12625 | |
5f5c8ee5 GM |
12626 | /* Get the next display element. */ |
12627 | if (!get_next_display_element (it)) | |
90adcf20 | 12628 | break; |
1c9241f5 | 12629 | |
5f5c8ee5 GM |
12630 | /* Produce glyphs. */ |
12631 | x_before = it->current_x; | |
12632 | n_glyphs_before = it->glyph_row->used[TEXT_AREA]; | |
12633 | PRODUCE_GLYPHS (it); | |
90adcf20 | 12634 | |
5f5c8ee5 GM |
12635 | nglyphs = it->glyph_row->used[TEXT_AREA] - n_glyphs_before; |
12636 | i = 0; | |
12637 | x = x_before; | |
12638 | while (i < nglyphs) | |
a2889657 | 12639 | { |
5f5c8ee5 GM |
12640 | struct glyph *glyph = row->glyphs[TEXT_AREA] + n_glyphs_before + i; |
12641 | ||
12642 | if (!it->truncate_lines_p | |
12643 | && x + glyph->pixel_width > max_x) | |
12644 | { | |
12645 | /* End of continued line or max_x reached. */ | |
12646 | it->glyph_row->used[TEXT_AREA] = n_glyphs_before + i; | |
12647 | it->current_x = x; | |
12648 | break; | |
12649 | } | |
12650 | else if (x + glyph->pixel_width > it->first_visible_x) | |
12651 | { | |
12652 | /* Glyph is at least partially visible. */ | |
12653 | ++it->hpos; | |
12654 | if (x < it->first_visible_x) | |
12655 | it->glyph_row->x = x - it->first_visible_x; | |
12656 | } | |
12657 | else | |
a2889657 | 12658 | { |
5f5c8ee5 GM |
12659 | /* Glyph is off the left margin of the display area. |
12660 | Should not happen. */ | |
12661 | abort (); | |
a2889657 | 12662 | } |
5f5c8ee5 GM |
12663 | |
12664 | row->ascent = max (row->ascent, it->max_ascent); | |
12665 | row->height = max (row->height, it->max_ascent + it->max_descent); | |
312246d1 GM |
12666 | row->phys_ascent = max (row->phys_ascent, it->max_phys_ascent); |
12667 | row->phys_height = max (row->phys_height, | |
12668 | it->max_phys_ascent + it->max_phys_descent); | |
5f5c8ee5 GM |
12669 | x += glyph->pixel_width; |
12670 | ++i; | |
a2889657 | 12671 | } |
5f5c8ee5 GM |
12672 | |
12673 | /* Stop if max_x reached. */ | |
12674 | if (i < nglyphs) | |
12675 | break; | |
12676 | ||
12677 | /* Stop at line ends. */ | |
12678 | if (ITERATOR_AT_END_OF_LINE_P (it)) | |
a2889657 | 12679 | { |
5f5c8ee5 GM |
12680 | it->continuation_lines_width = 0; |
12681 | break; | |
a2889657 | 12682 | } |
1c9241f5 | 12683 | |
5f5c8ee5 | 12684 | set_iterator_to_next (it); |
a688bb24 | 12685 | |
5f5c8ee5 GM |
12686 | /* Stop if truncating at the right edge. */ |
12687 | if (it->truncate_lines_p | |
12688 | && it->current_x >= it->last_visible_x) | |
12689 | { | |
12690 | /* Add truncation mark, but don't do it if the line is | |
12691 | truncated at a padding space. */ | |
12692 | if (IT_CHARPOS (*it) < it->string_nchars) | |
1c9241f5 | 12693 | { |
5f5c8ee5 GM |
12694 | if (!FRAME_WINDOW_P (it->f)) |
12695 | produce_special_glyphs (it, IT_TRUNCATION); | |
12696 | it->glyph_row->truncated_on_right_p = 1; | |
1c9241f5 | 12697 | } |
5f5c8ee5 | 12698 | break; |
1c9241f5 | 12699 | } |
a2889657 JB |
12700 | } |
12701 | ||
5f5c8ee5 GM |
12702 | /* Maybe insert a truncation at the left. */ |
12703 | if (it->first_visible_x | |
12704 | && IT_CHARPOS (*it) > 0) | |
a2889657 | 12705 | { |
5f5c8ee5 GM |
12706 | if (!FRAME_WINDOW_P (it->f)) |
12707 | insert_left_trunc_glyphs (it); | |
12708 | it->glyph_row->truncated_on_left_p = 1; | |
a2889657 JB |
12709 | } |
12710 | ||
5f5c8ee5 GM |
12711 | it->face_id = saved_face_id; |
12712 | ||
12713 | /* Value is number of columns displayed. */ | |
12714 | return it->hpos - hpos_at_start; | |
12715 | } | |
a2889657 | 12716 | |
a2889657 | 12717 | |
a2889657 | 12718 | \f |
5f5c8ee5 GM |
12719 | /* This is like a combination of memq and assq. Return 1 if PROPVAL |
12720 | appears as an element of LIST or as the car of an element of LIST. | |
12721 | If PROPVAL is a list, compare each element against LIST in that | |
12722 | way, and return 1 if any element of PROPVAL is found in LIST. | |
12723 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12724 | |
12725 | int | |
12726 | invisible_p (propval, list) | |
12727 | register Lisp_Object propval; | |
12728 | Lisp_Object list; | |
12729 | { | |
af460d46 | 12730 | register Lisp_Object tail, proptail; |
9472f927 | 12731 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
642eefc6 RS |
12732 | { |
12733 | register Lisp_Object tem; | |
9472f927 | 12734 | tem = XCAR (tail); |
642eefc6 RS |
12735 | if (EQ (propval, tem)) |
12736 | return 1; | |
9472f927 | 12737 | if (CONSP (tem) && EQ (propval, XCAR (tem))) |
642eefc6 RS |
12738 | return 1; |
12739 | } | |
af460d46 RS |
12740 | if (CONSP (propval)) |
12741 | for (proptail = propval; CONSP (proptail); | |
9472f927 | 12742 | proptail = XCDR (proptail)) |
af460d46 RS |
12743 | { |
12744 | Lisp_Object propelt; | |
9472f927 GM |
12745 | propelt = XCAR (proptail); |
12746 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
12747 | { |
12748 | register Lisp_Object tem; | |
9472f927 | 12749 | tem = XCAR (tail); |
af460d46 RS |
12750 | if (EQ (propelt, tem)) |
12751 | return 1; | |
9472f927 | 12752 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) |
af460d46 RS |
12753 | return 1; |
12754 | } | |
12755 | } | |
642eefc6 RS |
12756 | return 0; |
12757 | } | |
12758 | ||
5f5c8ee5 GM |
12759 | |
12760 | /* Return 1 if PROPVAL appears as the car of an element of LIST and | |
12761 | the cdr of that element is non-nil. If PROPVAL is a list, check | |
12762 | each element of PROPVAL in that way, and the first time some | |
12763 | element is found, return 1 if the cdr of that element is non-nil. | |
12764 | Otherwise return 0. This function cannot quit. */ | |
642eefc6 RS |
12765 | |
12766 | int | |
12767 | invisible_ellipsis_p (propval, list) | |
12768 | register Lisp_Object propval; | |
12769 | Lisp_Object list; | |
12770 | { | |
af460d46 | 12771 | register Lisp_Object tail, proptail; |
9472f927 GM |
12772 | |
12773 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
642eefc6 RS |
12774 | { |
12775 | register Lisp_Object tem; | |
9472f927 GM |
12776 | tem = XCAR (tail); |
12777 | if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
12778 | return ! NILP (XCDR (tem)); | |
642eefc6 | 12779 | } |
9472f927 | 12780 | |
af460d46 | 12781 | if (CONSP (propval)) |
9472f927 | 12782 | for (proptail = propval; CONSP (proptail); proptail = XCDR (proptail)) |
af460d46 RS |
12783 | { |
12784 | Lisp_Object propelt; | |
9472f927 GM |
12785 | propelt = XCAR (proptail); |
12786 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
af460d46 RS |
12787 | { |
12788 | register Lisp_Object tem; | |
9472f927 GM |
12789 | tem = XCAR (tail); |
12790 | if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
12791 | return ! NILP (XCDR (tem)); | |
af460d46 RS |
12792 | } |
12793 | } | |
9472f927 | 12794 | |
642eefc6 RS |
12795 | return 0; |
12796 | } | |
5f5c8ee5 GM |
12797 | |
12798 | ||
642eefc6 | 12799 | \f |
5f5c8ee5 GM |
12800 | /*********************************************************************** |
12801 | Initialization | |
12802 | ***********************************************************************/ | |
12803 | ||
a2889657 JB |
12804 | void |
12805 | syms_of_xdisp () | |
12806 | { | |
c6e89d6c GM |
12807 | Vwith_echo_area_save_vector = Qnil; |
12808 | staticpro (&Vwith_echo_area_save_vector); | |
5f5c8ee5 | 12809 | |
c6e89d6c GM |
12810 | Vmessage_stack = Qnil; |
12811 | staticpro (&Vmessage_stack); | |
12812 | ||
735c094c | 12813 | Qinhibit_redisplay = intern ("inhibit-redisplay"); |
c6e89d6c | 12814 | staticpro (&Qinhibit_redisplay); |
735c094c | 12815 | |
5f5c8ee5 GM |
12816 | #if GLYPH_DEBUG |
12817 | defsubr (&Sdump_glyph_matrix); | |
12818 | defsubr (&Sdump_glyph_row); | |
e037b9ec | 12819 | defsubr (&Sdump_tool_bar_row); |
5f5c8ee5 | 12820 | defsubr (&Strace_redisplay_toggle); |
bf9249e3 | 12821 | defsubr (&Strace_to_stderr); |
5f5c8ee5 GM |
12822 | #endif |
12823 | ||
cf074754 RS |
12824 | staticpro (&Qmenu_bar_update_hook); |
12825 | Qmenu_bar_update_hook = intern ("menu-bar-update-hook"); | |
12826 | ||
d46fb96a | 12827 | staticpro (&Qoverriding_terminal_local_map); |
7079aefa | 12828 | Qoverriding_terminal_local_map = intern ("overriding-terminal-local-map"); |
d46fb96a | 12829 | |
399164b4 KH |
12830 | staticpro (&Qoverriding_local_map); |
12831 | Qoverriding_local_map = intern ("overriding-local-map"); | |
12832 | ||
75c43375 RS |
12833 | staticpro (&Qwindow_scroll_functions); |
12834 | Qwindow_scroll_functions = intern ("window-scroll-functions"); | |
12835 | ||
e0bfbde6 RS |
12836 | staticpro (&Qredisplay_end_trigger_functions); |
12837 | Qredisplay_end_trigger_functions = intern ("redisplay-end-trigger-functions"); | |
5f5c8ee5 | 12838 | |
2e54982e RS |
12839 | staticpro (&Qinhibit_point_motion_hooks); |
12840 | Qinhibit_point_motion_hooks = intern ("inhibit-point-motion-hooks"); | |
12841 | ||
5f5c8ee5 | 12842 | Qdisplay = intern ("display"); |
f3751a65 | 12843 | staticpro (&Qdisplay); |
5f5c8ee5 GM |
12844 | Qspace_width = intern ("space-width"); |
12845 | staticpro (&Qspace_width); | |
5f5c8ee5 GM |
12846 | Qraise = intern ("raise"); |
12847 | staticpro (&Qraise); | |
12848 | Qspace = intern ("space"); | |
12849 | staticpro (&Qspace); | |
f3751a65 GM |
12850 | Qmargin = intern ("margin"); |
12851 | staticpro (&Qmargin); | |
5f5c8ee5 | 12852 | Qleft_margin = intern ("left-margin"); |
f3751a65 | 12853 | staticpro (&Qleft_margin); |
5f5c8ee5 | 12854 | Qright_margin = intern ("right-margin"); |
f3751a65 | 12855 | staticpro (&Qright_margin); |
5f5c8ee5 GM |
12856 | Qalign_to = intern ("align-to"); |
12857 | staticpro (&Qalign_to); | |
12858 | QCalign_to = intern (":align-to"); | |
12859 | staticpro (&QCalign_to); | |
5f5c8ee5 GM |
12860 | Qrelative_width = intern ("relative-width"); |
12861 | staticpro (&Qrelative_width); | |
12862 | QCrelative_width = intern (":relative-width"); | |
12863 | staticpro (&QCrelative_width); | |
12864 | QCrelative_height = intern (":relative-height"); | |
12865 | staticpro (&QCrelative_height); | |
12866 | QCeval = intern (":eval"); | |
12867 | staticpro (&QCeval); | |
d3acf96b | 12868 | Qwhen = intern ("when"); |
f3751a65 | 12869 | staticpro (&Qwhen); |
886bd6f2 GM |
12870 | QCfile = intern (":file"); |
12871 | staticpro (&QCfile); | |
5f5c8ee5 GM |
12872 | Qfontified = intern ("fontified"); |
12873 | staticpro (&Qfontified); | |
12874 | Qfontification_functions = intern ("fontification-functions"); | |
12875 | staticpro (&Qfontification_functions); | |
5f5c8ee5 GM |
12876 | Qtrailing_whitespace = intern ("trailing-whitespace"); |
12877 | staticpro (&Qtrailing_whitespace); | |
12878 | Qimage = intern ("image"); | |
12879 | staticpro (&Qimage); | |
12880 | ||
a2889657 JB |
12881 | last_arrow_position = Qnil; |
12882 | last_arrow_string = Qnil; | |
f3751a65 GM |
12883 | staticpro (&last_arrow_position); |
12884 | staticpro (&last_arrow_string); | |
c6e89d6c GM |
12885 | |
12886 | echo_buffer[0] = echo_buffer[1] = Qnil; | |
12887 | staticpro (&echo_buffer[0]); | |
12888 | staticpro (&echo_buffer[1]); | |
12889 | ||
12890 | echo_area_buffer[0] = echo_area_buffer[1] = Qnil; | |
12891 | staticpro (&echo_area_buffer[0]); | |
12892 | staticpro (&echo_area_buffer[1]); | |
a2889657 | 12893 | |
8f897821 GM |
12894 | DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace, |
12895 | "Non-nil means highlight trailing whitespace.\n\ | |
12896 | The face used for trailing whitespace is `trailing-whitespace'."); | |
12897 | Vshow_trailing_whitespace = Qnil; | |
12898 | ||
735c094c KH |
12899 | DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay, |
12900 | "Non-nil means don't actually do any redisplay.\n\ | |
12901 | This is used for internal purposes."); | |
12902 | Vinhibit_redisplay = Qnil; | |
12903 | ||
a2889657 | 12904 | DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string, |
8c45d522 | 12905 | "String (or mode line construct) included (normally) in `mode-line-format'."); |
a2889657 JB |
12906 | Vglobal_mode_string = Qnil; |
12907 | ||
12908 | DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position, | |
12909 | "Marker for where to display an arrow on top of the buffer text.\n\ | |
12910 | This must be the beginning of a line in order to work.\n\ | |
12911 | See also `overlay-arrow-string'."); | |
12912 | Voverlay_arrow_position = Qnil; | |
12913 | ||
12914 | DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string, | |
12915 | "String to display as an arrow. See also `overlay-arrow-position'."); | |
12916 | Voverlay_arrow_string = Qnil; | |
12917 | ||
12918 | DEFVAR_INT ("scroll-step", &scroll_step, | |
12919 | "*The number of lines to try scrolling a window by when point moves out.\n\ | |
44fa5b1e JB |
12920 | If that fails to bring point back on frame, point is centered instead.\n\ |
12921 | If this is zero, point is always centered after it moves off frame."); | |
a2889657 | 12922 | |
0789adb2 | 12923 | DEFVAR_INT ("scroll-conservatively", &scroll_conservatively, |
090f7baa GM |
12924 | "*Scroll up to this many lines, to bring point back on screen.\n\ |
12925 | A value of zero means to scroll the text to center point vertically\n\ | |
12926 | in the window."); | |
0789adb2 RS |
12927 | scroll_conservatively = 0; |
12928 | ||
9afd2168 RS |
12929 | DEFVAR_INT ("scroll-margin", &scroll_margin, |
12930 | "*Number of lines of margin at the top and bottom of a window.\n\ | |
12931 | Recenter the window whenever point gets within this many lines\n\ | |
12932 | of the top or bottom of the window."); | |
12933 | scroll_margin = 0; | |
12934 | ||
5f5c8ee5 | 12935 | #if GLYPH_DEBUG |
a2889657 | 12936 | DEFVAR_INT ("debug-end-pos", &debug_end_pos, "Don't ask"); |
5f5c8ee5 | 12937 | #endif |
a2889657 JB |
12938 | |
12939 | DEFVAR_BOOL ("truncate-partial-width-windows", | |
12940 | &truncate_partial_width_windows, | |
44fa5b1e | 12941 | "*Non-nil means truncate lines in all windows less than full frame wide."); |
a2889657 JB |
12942 | truncate_partial_width_windows = 1; |
12943 | ||
12944 | DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video, | |
12945 | "*Non-nil means use inverse video for the mode line."); | |
12946 | mode_line_inverse_video = 1; | |
aa6d10fa RS |
12947 | |
12948 | DEFVAR_INT ("line-number-display-limit", &line_number_display_limit, | |
5f5c8ee5 | 12949 | "*Maximum buffer size for which line number should be displayed.\n\ |
db4f2bfa | 12950 | If the buffer is bigger than this, the line number does not appear\n\ |
9f027393 | 12951 | in the mode line."); |
aa6d10fa | 12952 | line_number_display_limit = 1000000; |
fba9ce76 | 12953 | |
5d121aec KH |
12954 | DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width, |
12955 | "*Maximum line width (in characters) for line number display.\n\ | |
12956 | If the average length of the lines near point is bigger than this, then the\n\ | |
12957 | line number may be omitted from the mode line."); | |
12958 | line_number_display_limit_width = 200; | |
12959 | ||
fba9ce76 RS |
12960 | DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows, |
12961 | "*Non-nil means highlight region even in nonselected windows."); | |
293a54ce | 12962 | highlight_nonselected_windows = 0; |
d39b6696 KH |
12963 | |
12964 | DEFVAR_BOOL ("multiple-frames", &multiple_frames, | |
3450d04c KH |
12965 | "Non-nil if more than one frame is visible on this display.\n\ |
12966 | Minibuffer-only frames don't count, but iconified frames do.\n\ | |
4c2eb242 RS |
12967 | This variable is not guaranteed to be accurate except while processing\n\ |
12968 | `frame-title-format' and `icon-title-format'."); | |
d39b6696 KH |
12969 | |
12970 | DEFVAR_LISP ("frame-title-format", &Vframe_title_format, | |
5f5c8ee5 | 12971 | "Template for displaying the title bar of visible frames.\n\ |
d39b6696 KH |
12972 | \(Assuming the window manager supports this feature.)\n\ |
12973 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12974 | and is used only on frames for which no explicit name has been set\n\ | |
12975 | \(see `modify-frame-parameters')."); | |
12976 | DEFVAR_LISP ("icon-title-format", &Vicon_title_format, | |
5f5c8ee5 | 12977 | "Template for displaying the title bar of an iconified frame.\n\ |
d39b6696 KH |
12978 | \(Assuming the window manager supports this feature.)\n\ |
12979 | This variable has the same structure as `mode-line-format' (which see),\n\ | |
12980 | and is used only on frames for which no explicit name has been set\n\ | |
12981 | \(see `modify-frame-parameters')."); | |
12982 | Vicon_title_format | |
12983 | = Vframe_title_format | |
12984 | = Fcons (intern ("multiple-frames"), | |
12985 | Fcons (build_string ("%b"), | |
12986 | Fcons (Fcons (build_string (""), | |
12987 | Fcons (intern ("invocation-name"), | |
12988 | Fcons (build_string ("@"), | |
12989 | Fcons (intern ("system-name"), | |
12990 | Qnil)))), | |
12991 | Qnil))); | |
5992c4f7 KH |
12992 | |
12993 | DEFVAR_LISP ("message-log-max", &Vmessage_log_max, | |
12994 | "Maximum number of lines to keep in the message log buffer.\n\ | |
12995 | If nil, disable message logging. If t, log messages but don't truncate\n\ | |
12996 | the buffer when it becomes large."); | |
12997 | XSETFASTINT (Vmessage_log_max, 50); | |
08b610e4 RS |
12998 | |
12999 | DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions, | |
13000 | "Functions called before redisplay, if window sizes have changed.\n\ | |
13001 | The value should be a list of functions that take one argument.\n\ | |
13002 | Just before redisplay, for each frame, if any of its windows have changed\n\ | |
13003 | size since the last redisplay, or have been split or deleted,\n\ | |
13004 | all the functions in the list are called, with the frame as argument."); | |
13005 | Vwindow_size_change_functions = Qnil; | |
75c43375 RS |
13006 | |
13007 | DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions, | |
5f5c8ee5 | 13008 | "List of Functions to call before redisplaying a window with scrolling.\n\ |
75c43375 | 13009 | Each function is called with two arguments, the window\n\ |
8d9583b0 RS |
13010 | and its new display-start position. Note that the value of `window-end'\n\ |
13011 | is not valid when these functions are called."); | |
75c43375 | 13012 | Vwindow_scroll_functions = Qnil; |
5f5c8ee5 | 13013 | |
e037b9ec GM |
13014 | DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p, |
13015 | "*Non-nil means automatically resize tool-bars.\n\ | |
13016 | This increases a tool-bar's height if not all tool-bar items are visible.\n\ | |
13017 | It decreases a tool-bar's height when it would display blank lines\n\ | |
5f5c8ee5 | 13018 | otherwise."); |
e037b9ec | 13019 | auto_resize_tool_bars_p = 1; |
5f5c8ee5 | 13020 | |
e037b9ec GM |
13021 | DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p, |
13022 | "*Non-nil means raise tool-bar buttons when the mouse moves over them."); | |
13023 | auto_raise_tool_bar_buttons_p = 1; | |
5f5c8ee5 | 13024 | |
e037b9ec GM |
13025 | DEFVAR_INT ("tool-bar-button-margin", &tool_bar_button_margin, |
13026 | "*Margin around tool-bar buttons in pixels."); | |
13027 | tool_bar_button_margin = 1; | |
5f5c8ee5 | 13028 | |
e037b9ec GM |
13029 | DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief, |
13030 | "Relief thickness of tool-bar buttons."); | |
13031 | tool_bar_button_relief = 3; | |
5f5c8ee5 GM |
13032 | |
13033 | DEFVAR_LISP ("fontification-functions", &Vfontification_functions, | |
13034 | "List of functions to call to fontify regions of text.\n\ | |
13035 | Each function is called with one argument POS. Functions must\n\ | |
13036 | fontify a region starting at POS in the current buffer, and give\n\ | |
13037 | fontified regions the property `fontified'.\n\ | |
13038 | This variable automatically becomes buffer-local when set."); | |
13039 | Vfontification_functions = Qnil; | |
13040 | Fmake_local_variable (Qfontification_functions); | |
7bbe686f AI |
13041 | |
13042 | DEFVAR_BOOL ("unibyte-display-via-language-environment", | |
5f5c8ee5 GM |
13043 | &unibyte_display_via_language_environment, |
13044 | "*Non-nil means display unibyte text according to language environment.\n\ | |
7bbe686f AI |
13045 | Specifically this means that unibyte non-ASCII characters\n\ |
13046 | are displayed by converting them to the equivalent multibyte characters\n\ | |
13047 | according to the current language environment. As a result, they are\n\ | |
13048 | displayed according to the current fontset."); | |
13049 | unibyte_display_via_language_environment = 0; | |
c6e89d6c GM |
13050 | |
13051 | DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height, | |
13052 | "*Maximum height for resizing mini-windows.\n\ | |
13053 | If a float, it specifies a fraction of the mini-window frame's height.\n\ | |
97cafc0f GM |
13054 | If an integer, it specifies a number of lines.\n\ |
13055 | If nil, don't resize."); | |
c6e89d6c | 13056 | Vmax_mini_window_height = make_float (0.25); |
d6d26ed3 GM |
13057 | |
13058 | DEFVAR_BOOL ("cursor-in-non-selected-windows", | |
13059 | &cursor_in_non_selected_windows, | |
13060 | "*Non-nil means display a hollow cursor in non-selected windows.\n\ | |
13061 | Nil means don't display a cursor there."); | |
13062 | cursor_in_non_selected_windows = 1; | |
a2889657 JB |
13063 | } |
13064 | ||
5f5c8ee5 GM |
13065 | |
13066 | /* Initialize this module when Emacs starts. */ | |
13067 | ||
dfcf069d | 13068 | void |
a2889657 JB |
13069 | init_xdisp () |
13070 | { | |
13071 | Lisp_Object root_window; | |
5f5c8ee5 | 13072 | struct window *mini_w; |
a2889657 | 13073 | |
5f5c8ee5 | 13074 | CHARPOS (this_line_start_pos) = 0; |
a2889657 JB |
13075 | |
13076 | mini_w = XWINDOW (minibuf_window); | |
11e82b76 | 13077 | root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w))); |
a2889657 | 13078 | |
a2889657 JB |
13079 | if (!noninteractive) |
13080 | { | |
5f5c8ee5 GM |
13081 | struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (root_window))); |
13082 | int i; | |
13083 | ||
13084 | XSETFASTINT (XWINDOW (root_window)->top, FRAME_TOP_MARGIN (f)); | |
12c226c5 | 13085 | set_window_height (root_window, |
5f5c8ee5 | 13086 | FRAME_HEIGHT (f) - 1 - FRAME_TOP_MARGIN (f), |
12c226c5 | 13087 | 0); |
c2213350 | 13088 | XSETFASTINT (mini_w->top, FRAME_HEIGHT (f) - 1); |
a2889657 JB |
13089 | set_window_height (minibuf_window, 1, 0); |
13090 | ||
c2213350 KH |
13091 | XSETFASTINT (XWINDOW (root_window)->width, FRAME_WIDTH (f)); |
13092 | XSETFASTINT (mini_w->width, FRAME_WIDTH (f)); | |
5f5c8ee5 GM |
13093 | |
13094 | scratch_glyph_row.glyphs[TEXT_AREA] = scratch_glyphs; | |
13095 | scratch_glyph_row.glyphs[TEXT_AREA + 1] | |
13096 | = scratch_glyphs + MAX_SCRATCH_GLYPHS; | |
13097 | ||
13098 | /* The default ellipsis glyphs `...'. */ | |
13099 | for (i = 0; i < 3; ++i) | |
13100 | XSETFASTINT (default_invis_vector[i], '.'); | |
a2889657 | 13101 | } |
5f5c8ee5 GM |
13102 | |
13103 | #ifdef HAVE_WINDOW_SYSTEM | |
13104 | { | |
13105 | /* Allocate the buffer for frame titles. */ | |
13106 | int size = 100; | |
13107 | frame_title_buf = (char *) xmalloc (size); | |
13108 | frame_title_buf_end = frame_title_buf + size; | |
13109 | frame_title_ptr = NULL; | |
13110 | } | |
13111 | #endif /* HAVE_WINDOW_SYSTEM */ | |
a2889657 | 13112 | } |
5f5c8ee5 GM |
13113 | |
13114 |