Commit | Line | Data |
---|---|---|
1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 2 | |
11ee65af | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2014 Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
1ab256cb RM |
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 | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 19 | |
68c45bf0 | 20 | #include <config.h> |
1ab256cb | 21 | |
2381d133 JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
1ab256cb | 24 | #include <sys/param.h> |
9dde47f5 | 25 | #include <errno.h> |
15e7873a | 26 | #include <stdio.h> |
dfcf069d | 27 | #include <unistd.h> |
7ee72033 | 28 | |
d6202519 PE |
29 | #include <verify.h> |
30 | ||
1ab256cb | 31 | #include "lisp.h" |
21cf4cf8 | 32 | #include "intervals.h" |
1ab256cb RM |
33 | #include "window.h" |
34 | #include "commands.h" | |
8f348ed5 | 35 | #include "character.h" |
e5560ff7 | 36 | #include "buffer.h" |
28e969dd | 37 | #include "region-cache.h" |
1ab256cb | 38 | #include "indent.h" |
d014bf88 | 39 | #include "blockinput.h" |
2538fae4 | 40 | #include "keyboard.h" |
e35f6ff7 | 41 | #include "keymap.h" |
08460cd4 | 42 | #include "frame.h" |
1ab256cb | 43 | |
587fd086 FP |
44 | #ifdef WINDOWSNT |
45 | #include "w32heap.h" /* for mmap_* */ | |
46 | #endif | |
47 | ||
70fe8236 | 48 | struct buffer *current_buffer; /* The current buffer. */ |
1ab256cb RM |
49 | |
50 | /* First buffer in chain of all buffers (in reverse order of creation). | |
179dade4 | 51 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
52 | |
53 | struct buffer *all_buffers; | |
54 | ||
55 | /* This structure holds the default values of the buffer-local variables | |
56 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
57 | The default value occupies the same slot in this structure | |
58 | as an individual buffer's value occupies in that buffer. | |
59 | Setting the default value also goes through the alist of buffers | |
60 | and stores into each buffer that does not say it has a local value. */ | |
61 | ||
e32a5799 | 62 | struct buffer alignas (GCALIGNMENT) buffer_defaults; |
1ab256cb | 63 | |
1ab256cb RM |
64 | /* This structure marks which slots in a buffer have corresponding |
65 | default values in buffer_defaults. | |
66 | Each such slot has a nonzero value in this structure. | |
67 | The value has only one nonzero bit. | |
68 | ||
69 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
70 | the entry for that slot (found in the same slot in this structure) |
71 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
72 | |
73 | If a slot in this structure is -1, then even though there may | |
74 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
75 | and the corresponding slot in buffer_defaults is not used. | |
76 | ||
1ab256cb | 77 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
70fe8236 | 78 | zero, that is a bug. */ |
1ab256cb RM |
79 | |
80 | struct buffer buffer_local_flags; | |
81 | ||
82 | /* This structure holds the names of symbols whose values may be | |
70fe8236 | 83 | buffer-local. It is indexed and accessed in the same way as the above. */ |
1ab256cb | 84 | |
e32a5799 | 85 | struct buffer alignas (GCALIGNMENT) buffer_local_symbols; |
6b61353c | 86 | |
ce5b453a SM |
87 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
88 | the buffer structure. */ | |
89 | ||
90 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
91 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
92 | ||
21514da7 PE |
93 | /* Maximum length of an overlay vector. */ |
94 | #define OVERLAY_COUNT_MAX \ | |
95 | ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \ | |
663e2b3f | 96 | min (PTRDIFF_MAX, SIZE_MAX) / word_size)) |
21514da7 | 97 | |
13de9290 RS |
98 | /* Flags indicating which built-in buffer-local variables |
99 | are permanent locals. */ | |
7313acd0 | 100 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
101 | |
102 | /* Number of per-buffer variables used. */ | |
103 | ||
7313acd0 | 104 | int last_per_buffer_idx; |
13de9290 | 105 | |
f57e2426 | 106 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
37ef52bb | 107 | bool after, Lisp_Object arg1, |
f57e2426 J |
108 | Lisp_Object arg2, Lisp_Object arg3); |
109 | static void swap_out_buffer_local_variables (struct buffer *b); | |
37ef52bb | 110 | static void reset_buffer_local_variables (struct buffer *, bool); |
1ab256cb | 111 | |
8f3a2c26 DA |
112 | /* Alist of all buffer names vs the buffers. This used to be |
113 | a Lisp-visible variable, but is no longer, to prevent lossage | |
114 | due to user rplac'ing this alist or its elements. */ | |
1ab256cb RM |
115 | Lisp_Object Vbuffer_alist; |
116 | ||
955cbe7b | 117 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 118 | |
43ed3b8d | 119 | /* Hook run before changing a major mode. */ |
955cbe7b | 120 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 121 | |
dbc4e1c1 | 122 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
123 | Lisp_Object Qbefore_change_functions; |
124 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 125 | |
955cbe7b PE |
126 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
127 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 128 | |
955cbe7b | 129 | static Lisp_Object Qprotected_field; |
1ab256cb | 130 | |
70fe8236 | 131 | static Lisp_Object QSFundamental; /* A string "Fundamental". */ |
1ab256cb | 132 | |
955cbe7b | 133 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 134 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 135 | |
955cbe7b | 136 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 137 | |
955cbe7b | 138 | static Lisp_Object Qoverlayp; |
52f8ec73 | 139 | |
955cbe7b | 140 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 141 | |
28545e04 | 142 | static Lisp_Object Qevaporate; |
5985d248 | 143 | |
294d215f RS |
144 | Lisp_Object Qmodification_hooks; |
145 | Lisp_Object Qinsert_in_front_hooks; | |
146 | Lisp_Object Qinsert_behind_hooks; | |
147 | ||
fd05c7e9 | 148 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
149 | static void free_buffer_text (struct buffer *b); |
150 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 151 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
37ef52bb | 152 | static Lisp_Object buffer_lisp_local_variables (struct buffer *, bool); |
b86af064 | 153 | |
84575e67 PE |
154 | static void |
155 | CHECK_OVERLAY (Lisp_Object x) | |
156 | { | |
157 | CHECK_TYPE (OVERLAYP (x), Qoverlayp, x); | |
158 | } | |
159 | ||
080db47f EZ |
160 | /* These setters are used only in this file, so they can be private. |
161 | The public setters are inline functions defined in buffer.h. */ | |
b0ab8123 | 162 | static void |
39eb03f1 PE |
163 | bset_abbrev_mode (struct buffer *b, Lisp_Object val) |
164 | { | |
165 | b->INTERNAL_FIELD (abbrev_mode) = val; | |
166 | } | |
b0ab8123 | 167 | static void |
39eb03f1 PE |
168 | bset_abbrev_table (struct buffer *b, Lisp_Object val) |
169 | { | |
170 | b->INTERNAL_FIELD (abbrev_table) = val; | |
171 | } | |
b0ab8123 | 172 | static void |
39eb03f1 PE |
173 | bset_auto_fill_function (struct buffer *b, Lisp_Object val) |
174 | { | |
175 | b->INTERNAL_FIELD (auto_fill_function) = val; | |
176 | } | |
b0ab8123 | 177 | static void |
39eb03f1 PE |
178 | bset_auto_save_file_format (struct buffer *b, Lisp_Object val) |
179 | { | |
180 | b->INTERNAL_FIELD (auto_save_file_format) = val; | |
181 | } | |
b0ab8123 | 182 | static void |
39eb03f1 PE |
183 | bset_auto_save_file_name (struct buffer *b, Lisp_Object val) |
184 | { | |
185 | b->INTERNAL_FIELD (auto_save_file_name) = val; | |
186 | } | |
b0ab8123 | 187 | static void |
39eb03f1 PE |
188 | bset_backed_up (struct buffer *b, Lisp_Object val) |
189 | { | |
190 | b->INTERNAL_FIELD (backed_up) = val; | |
191 | } | |
b0ab8123 | 192 | static void |
39eb03f1 PE |
193 | bset_begv_marker (struct buffer *b, Lisp_Object val) |
194 | { | |
195 | b->INTERNAL_FIELD (begv_marker) = val; | |
196 | } | |
b0ab8123 | 197 | static void |
39eb03f1 PE |
198 | bset_bidi_display_reordering (struct buffer *b, Lisp_Object val) |
199 | { | |
200 | b->INTERNAL_FIELD (bidi_display_reordering) = val; | |
201 | } | |
b0ab8123 | 202 | static void |
39eb03f1 PE |
203 | bset_buffer_file_coding_system (struct buffer *b, Lisp_Object val) |
204 | { | |
205 | b->INTERNAL_FIELD (buffer_file_coding_system) = val; | |
206 | } | |
b0ab8123 | 207 | static void |
39eb03f1 PE |
208 | bset_case_fold_search (struct buffer *b, Lisp_Object val) |
209 | { | |
210 | b->INTERNAL_FIELD (case_fold_search) = val; | |
211 | } | |
b0ab8123 | 212 | static void |
39eb03f1 PE |
213 | bset_ctl_arrow (struct buffer *b, Lisp_Object val) |
214 | { | |
215 | b->INTERNAL_FIELD (ctl_arrow) = val; | |
216 | } | |
b0ab8123 | 217 | static void |
39eb03f1 PE |
218 | bset_cursor_in_non_selected_windows (struct buffer *b, Lisp_Object val) |
219 | { | |
220 | b->INTERNAL_FIELD (cursor_in_non_selected_windows) = val; | |
221 | } | |
b0ab8123 | 222 | static void |
39eb03f1 PE |
223 | bset_cursor_type (struct buffer *b, Lisp_Object val) |
224 | { | |
225 | b->INTERNAL_FIELD (cursor_type) = val; | |
226 | } | |
b0ab8123 | 227 | static void |
39eb03f1 PE |
228 | bset_display_table (struct buffer *b, Lisp_Object val) |
229 | { | |
230 | b->INTERNAL_FIELD (display_table) = val; | |
231 | } | |
b0ab8123 | 232 | static void |
39eb03f1 PE |
233 | bset_extra_line_spacing (struct buffer *b, Lisp_Object val) |
234 | { | |
235 | b->INTERNAL_FIELD (extra_line_spacing) = val; | |
236 | } | |
b0ab8123 | 237 | static void |
39eb03f1 PE |
238 | bset_file_format (struct buffer *b, Lisp_Object val) |
239 | { | |
240 | b->INTERNAL_FIELD (file_format) = val; | |
241 | } | |
b0ab8123 | 242 | static void |
39eb03f1 PE |
243 | bset_file_truename (struct buffer *b, Lisp_Object val) |
244 | { | |
245 | b->INTERNAL_FIELD (file_truename) = val; | |
246 | } | |
b0ab8123 | 247 | static void |
39eb03f1 PE |
248 | bset_fringe_cursor_alist (struct buffer *b, Lisp_Object val) |
249 | { | |
250 | b->INTERNAL_FIELD (fringe_cursor_alist) = val; | |
251 | } | |
b0ab8123 | 252 | static void |
39eb03f1 PE |
253 | bset_fringe_indicator_alist (struct buffer *b, Lisp_Object val) |
254 | { | |
255 | b->INTERNAL_FIELD (fringe_indicator_alist) = val; | |
256 | } | |
b0ab8123 | 257 | static void |
39eb03f1 PE |
258 | bset_fringes_outside_margins (struct buffer *b, Lisp_Object val) |
259 | { | |
260 | b->INTERNAL_FIELD (fringes_outside_margins) = val; | |
261 | } | |
b0ab8123 | 262 | static void |
39eb03f1 PE |
263 | bset_header_line_format (struct buffer *b, Lisp_Object val) |
264 | { | |
265 | b->INTERNAL_FIELD (header_line_format) = val; | |
266 | } | |
b0ab8123 | 267 | static void |
39eb03f1 PE |
268 | bset_indicate_buffer_boundaries (struct buffer *b, Lisp_Object val) |
269 | { | |
270 | b->INTERNAL_FIELD (indicate_buffer_boundaries) = val; | |
271 | } | |
b0ab8123 | 272 | static void |
39eb03f1 PE |
273 | bset_indicate_empty_lines (struct buffer *b, Lisp_Object val) |
274 | { | |
275 | b->INTERNAL_FIELD (indicate_empty_lines) = val; | |
276 | } | |
b0ab8123 | 277 | static void |
39eb03f1 PE |
278 | bset_invisibility_spec (struct buffer *b, Lisp_Object val) |
279 | { | |
280 | b->INTERNAL_FIELD (invisibility_spec) = val; | |
281 | } | |
b0ab8123 | 282 | static void |
39eb03f1 PE |
283 | bset_left_fringe_width (struct buffer *b, Lisp_Object val) |
284 | { | |
285 | b->INTERNAL_FIELD (left_fringe_width) = val; | |
286 | } | |
b0ab8123 | 287 | static void |
39eb03f1 PE |
288 | bset_major_mode (struct buffer *b, Lisp_Object val) |
289 | { | |
290 | b->INTERNAL_FIELD (major_mode) = val; | |
291 | } | |
b0ab8123 | 292 | static void |
39eb03f1 PE |
293 | bset_mark (struct buffer *b, Lisp_Object val) |
294 | { | |
295 | b->INTERNAL_FIELD (mark) = val; | |
296 | } | |
b0ab8123 | 297 | static void |
39eb03f1 PE |
298 | bset_minor_modes (struct buffer *b, Lisp_Object val) |
299 | { | |
300 | b->INTERNAL_FIELD (minor_modes) = val; | |
301 | } | |
b0ab8123 | 302 | static void |
39eb03f1 PE |
303 | bset_mode_line_format (struct buffer *b, Lisp_Object val) |
304 | { | |
305 | b->INTERNAL_FIELD (mode_line_format) = val; | |
306 | } | |
b0ab8123 | 307 | static void |
39eb03f1 PE |
308 | bset_mode_name (struct buffer *b, Lisp_Object val) |
309 | { | |
310 | b->INTERNAL_FIELD (mode_name) = val; | |
311 | } | |
b0ab8123 | 312 | static void |
39eb03f1 PE |
313 | bset_name (struct buffer *b, Lisp_Object val) |
314 | { | |
315 | b->INTERNAL_FIELD (name) = val; | |
316 | } | |
b0ab8123 | 317 | static void |
39eb03f1 PE |
318 | bset_overwrite_mode (struct buffer *b, Lisp_Object val) |
319 | { | |
320 | b->INTERNAL_FIELD (overwrite_mode) = val; | |
321 | } | |
b0ab8123 | 322 | static void |
39eb03f1 PE |
323 | bset_pt_marker (struct buffer *b, Lisp_Object val) |
324 | { | |
325 | b->INTERNAL_FIELD (pt_marker) = val; | |
326 | } | |
b0ab8123 | 327 | static void |
39eb03f1 PE |
328 | bset_right_fringe_width (struct buffer *b, Lisp_Object val) |
329 | { | |
330 | b->INTERNAL_FIELD (right_fringe_width) = val; | |
331 | } | |
b0ab8123 | 332 | static void |
39eb03f1 PE |
333 | bset_save_length (struct buffer *b, Lisp_Object val) |
334 | { | |
335 | b->INTERNAL_FIELD (save_length) = val; | |
336 | } | |
b0ab8123 | 337 | static void |
39eb03f1 PE |
338 | bset_scroll_bar_width (struct buffer *b, Lisp_Object val) |
339 | { | |
340 | b->INTERNAL_FIELD (scroll_bar_width) = val; | |
341 | } | |
b0ab8123 | 342 | static void |
39eb03f1 PE |
343 | bset_scroll_down_aggressively (struct buffer *b, Lisp_Object val) |
344 | { | |
345 | b->INTERNAL_FIELD (scroll_down_aggressively) = val; | |
346 | } | |
b0ab8123 | 347 | static void |
39eb03f1 PE |
348 | bset_scroll_up_aggressively (struct buffer *b, Lisp_Object val) |
349 | { | |
350 | b->INTERNAL_FIELD (scroll_up_aggressively) = val; | |
351 | } | |
b0ab8123 | 352 | static void |
39eb03f1 PE |
353 | bset_selective_display (struct buffer *b, Lisp_Object val) |
354 | { | |
355 | b->INTERNAL_FIELD (selective_display) = val; | |
356 | } | |
b0ab8123 | 357 | static void |
39eb03f1 PE |
358 | bset_selective_display_ellipses (struct buffer *b, Lisp_Object val) |
359 | { | |
360 | b->INTERNAL_FIELD (selective_display_ellipses) = val; | |
361 | } | |
b0ab8123 | 362 | static void |
39eb03f1 PE |
363 | bset_vertical_scroll_bar_type (struct buffer *b, Lisp_Object val) |
364 | { | |
365 | b->INTERNAL_FIELD (vertical_scroll_bar_type) = val; | |
366 | } | |
b0ab8123 | 367 | static void |
39eb03f1 PE |
368 | bset_word_wrap (struct buffer *b, Lisp_Object val) |
369 | { | |
370 | b->INTERNAL_FIELD (word_wrap) = val; | |
371 | } | |
b0ab8123 | 372 | static void |
39eb03f1 PE |
373 | bset_zv_marker (struct buffer *b, Lisp_Object val) |
374 | { | |
375 | b->INTERNAL_FIELD (zv_marker) = val; | |
376 | } | |
377 | ||
01136e9b | 378 | void |
d3da34e0 | 379 | nsberror (Lisp_Object spec) |
1ab256cb | 380 | { |
a7a60ce9 | 381 | if (STRINGP (spec)) |
d5db4077 | 382 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
383 | error ("Invalid buffer argument"); |
384 | } | |
385 | \f | |
a7ca3326 | 386 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
387 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
388 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 389 | (Lisp_Object object) |
0dc88e60 | 390 | { |
e578f381 | 391 | return ((BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object))) |
0dc88e60 RS |
392 | ? Qt : Qnil); |
393 | } | |
394 | ||
08460cd4 | 395 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 396 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
397 | If the optional arg FRAME is a frame, we return the buffer list in the |
398 | proper order for that frame: the buffers show in FRAME come first, | |
399 | followed by the rest of the buffers. */) | |
5842a27b | 400 | (Lisp_Object frame) |
1ab256cb | 401 | { |
a18b8cb5 | 402 | Lisp_Object general; |
08460cd4 RS |
403 | general = Fmapcar (Qcdr, Vbuffer_alist); |
404 | ||
405 | if (FRAMEP (frame)) | |
406 | { | |
a18b8cb5 KL |
407 | Lisp_Object framelist, prevlist, tail; |
408 | Lisp_Object args[3]; | |
08460cd4 | 409 | |
e69b0960 | 410 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f | 411 | prevlist = Fnreverse (Fcopy_sequence |
e69b0960 | 412 | (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 413 | |
a18b8cb5 KL |
414 | /* Remove from GENERAL any buffer that duplicates one in |
415 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 416 | tail = framelist; |
a18b8cb5 | 417 | while (CONSP (tail)) |
08460cd4 | 418 | { |
7539e11f KR |
419 | general = Fdelq (XCAR (tail), general); |
420 | tail = XCDR (tail); | |
08460cd4 | 421 | } |
a18b8cb5 KL |
422 | tail = prevlist; |
423 | while (CONSP (tail)) | |
424 | { | |
425 | general = Fdelq (XCAR (tail), general); | |
426 | tail = XCDR (tail); | |
427 | } | |
428 | ||
429 | args[0] = framelist; | |
430 | args[1] = general; | |
431 | args[2] = prevlist; | |
432 | return Fnconc (3, args); | |
08460cd4 | 433 | } |
9397e56f MR |
434 | else |
435 | return general; | |
1ab256cb RM |
436 | } |
437 | ||
04ae1b48 RS |
438 | /* Like Fassoc, but use Fstring_equal to compare |
439 | (which ignores text properties), | |
440 | and don't ever QUIT. */ | |
441 | ||
442 | static Lisp_Object | |
d3da34e0 | 443 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
444 | { |
445 | register Lisp_Object tail; | |
6d70a280 | 446 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
447 | { |
448 | register Lisp_Object elt, tem; | |
6d70a280 | 449 | elt = XCAR (tail); |
04ae1b48 RS |
450 | tem = Fstring_equal (Fcar (elt), key); |
451 | if (!NILP (tem)) | |
452 | return elt; | |
453 | } | |
454 | return Qnil; | |
455 | } | |
456 | ||
a7ca3326 | 457 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
458 | doc: /* Return the buffer named BUFFER-OR-NAME. |
459 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
460 | is a string and there is no buffer with that name, return nil. If | |
461 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 462 | (register Lisp_Object buffer_or_name) |
1ab256cb | 463 | { |
c8804c4f MR |
464 | if (BUFFERP (buffer_or_name)) |
465 | return buffer_or_name; | |
466 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 467 | |
c8804c4f | 468 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
469 | } |
470 | ||
471 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 472 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
473 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
474 | If there is no such live buffer, return nil. | |
7ee72033 | 475 | See also `find-buffer-visiting'. */) |
5842a27b | 476 | (register Lisp_Object filename) |
1ab256cb | 477 | { |
8f3a2c26 | 478 | register Lisp_Object tail, buf, handler; |
5fe0b67e | 479 | |
b7826503 | 480 | CHECK_STRING (filename); |
1ab256cb RM |
481 | filename = Fexpand_file_name (filename, Qnil); |
482 | ||
5fe0b67e RS |
483 | /* If the file name has special constructs in it, |
484 | call the corresponding file handler. */ | |
a617e913 | 485 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 486 | if (!NILP (handler)) |
a59225b1 CY |
487 | { |
488 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
489 | filename); | |
490 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
491 | } | |
5fe0b67e | 492 | |
8f3a2c26 | 493 | FOR_EACH_LIVE_BUFFER (tail, buf) |
1ab256cb | 494 | { |
4b4deea2 | 495 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
8f3a2c26 | 496 | if (!NILP (Fstring_equal (BVAR (XBUFFER (buf), filename), filename))) |
1ab256cb RM |
497 | return buf; |
498 | } | |
499 | return Qnil; | |
500 | } | |
501 | ||
52e01189 | 502 | Lisp_Object |
d3da34e0 | 503 | get_truename_buffer (register Lisp_Object filename) |
52e01189 | 504 | { |
8f3a2c26 | 505 | register Lisp_Object tail, buf; |
52e01189 | 506 | |
8f3a2c26 | 507 | FOR_EACH_LIVE_BUFFER (tail, buf) |
52e01189 | 508 | { |
4b4deea2 | 509 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
8f3a2c26 | 510 | if (!NILP (Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename))) |
52e01189 RS |
511 | return buf; |
512 | } | |
513 | return Qnil; | |
514 | } | |
515 | ||
a7ca3326 | 516 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
517 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
518 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
519 | return that buffer. If no such buffer exists, create a new buffer with | |
520 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
521 | buffer does not keep undo information. | |
522 | ||
523 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
524 | even if it is dead. The return value is never nil. */) | |
5842a27b | 525 | (register Lisp_Object buffer_or_name) |
1ab256cb | 526 | { |
cd265ca6 | 527 | register Lisp_Object buffer, name; |
1ab256cb RM |
528 | register struct buffer *b; |
529 | ||
cd265ca6 MR |
530 | buffer = Fget_buffer (buffer_or_name); |
531 | if (!NILP (buffer)) | |
532 | return buffer; | |
1ab256cb | 533 | |
cd265ca6 | 534 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
535 | error ("Empty string for buffer name is not allowed"); |
536 | ||
cc648cef | 537 | b = allocate_buffer (); |
1ab256cb | 538 | |
336cd056 RS |
539 | /* An ordinary buffer uses its own struct buffer_text. */ |
540 | b->text = &b->own_text; | |
9928463d DA |
541 | b->base_buffer = NULL; |
542 | /* No one shares the text with us now. */ | |
543 | b->indirections = 0; | |
98a07056 DA |
544 | /* No one shows us now. */ |
545 | b->window_count = 0; | |
336cd056 | 546 | |
1ab256cb | 547 | BUF_GAP_SIZE (b) = 20; |
4d7e6e51 | 548 | block_input (); |
3b06f880 KH |
549 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
550 | anchoring a search. */ | |
b86af064 | 551 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
4d7e6e51 | 552 | unblock_input (); |
1ab256cb | 553 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 554 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 555 | |
cffc6f3b CY |
556 | b->pt = BEG; |
557 | b->begv = BEG; | |
558 | b->zv = BEG; | |
559 | b->pt_byte = BEG_BYTE; | |
560 | b->begv_byte = BEG_BYTE; | |
561 | b->zv_byte = BEG_BYTE; | |
562 | ||
6d70a280 | 563 | BUF_GPT (b) = BEG; |
6d70a280 | 564 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
565 | |
566 | BUF_Z (b) = BEG; | |
6d70a280 | 567 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 568 | BUF_MODIFF (b) = 1; |
3e145152 | 569 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 570 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 | 571 | BUF_SAVE_MODIFF (b) = 1; |
f9e7c67e | 572 | BUF_COMPACT (b) = 1; |
0c94c8d6 | 573 | set_buffer_intervals (b, NULL); |
b5a225b4 GM |
574 | BUF_UNCHANGED_MODIFIED (b) = 1; |
575 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
576 | BUF_END_UNCHANGED (b) = 0; | |
577 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 578 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
3c35702f | 579 | b->text->inhibit_shrinking = false; |
009581fa | 580 | b->text->redisplay = false; |
1ab256cb | 581 | |
28e969dd JB |
582 | b->newline_cache = 0; |
583 | b->width_run_cache = 0; | |
e30b79c1 | 584 | b->bidi_paragraph_cache = 0; |
39eb03f1 | 585 | bset_width_table (b, Qnil); |
b5a225b4 | 586 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 587 | |
336cd056 RS |
588 | /* An ordinary buffer normally doesn't need markers |
589 | to handle BEGV and ZV. */ | |
39eb03f1 PE |
590 | bset_pt_marker (b, Qnil); |
591 | bset_begv_marker (b, Qnil); | |
592 | bset_zv_marker (b, Qnil); | |
04ae1b48 | 593 | |
cd265ca6 | 594 | name = Fcopy_sequence (buffer_or_name); |
0c94c8d6 | 595 | set_string_intervals (name, NULL); |
39eb03f1 | 596 | bset_name (b, name); |
04ae1b48 | 597 | |
39eb03f1 | 598 | bset_undo_list (b, SREF (name, 0) != ' ' ? Qnil : Qt); |
1ab256cb RM |
599 | |
600 | reset_buffer (b); | |
13de9290 | 601 | reset_buffer_local_variables (b, 1); |
1ab256cb | 602 | |
39eb03f1 | 603 | bset_mark (b, Fmake_marker ()); |
65745fad | 604 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 605 | |
1ab256cb | 606 | /* Put this in the alist of all live buffers. */ |
cd265ca6 | 607 | XSETBUFFER (buffer, b); |
6c6f1994 | 608 | Vbuffer_alist = nconc2 (Vbuffer_alist, list1 (Fcons (name, buffer))); |
9397e56f MR |
609 | /* And run buffer-list-update-hook. */ |
610 | if (!NILP (Vrun_hooks)) | |
611 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 612 | |
cd265ca6 | 613 | return buffer; |
336cd056 RS |
614 | } |
615 | ||
7e9d5818 | 616 | |
04e4cb3a GM |
617 | /* Return a list of overlays which is a copy of the overlay list |
618 | LIST, but for buffer B. */ | |
619 | ||
2410d73a | 620 | static struct Lisp_Overlay * |
d3da34e0 | 621 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 622 | { |
2410d73a | 623 | struct Lisp_Overlay *result = NULL, *tail = NULL; |
04e4cb3a | 624 | |
2410d73a | 625 | for (; list; list = list->next) |
04e4cb3a | 626 | { |
fa691a83 DA |
627 | Lisp_Object overlay, start, end; |
628 | struct Lisp_Marker *m; | |
04e4cb3a | 629 | |
c644523b DA |
630 | eassert (MARKERP (list->start)); |
631 | m = XMARKER (list->start); | |
fa691a83 DA |
632 | start = build_marker (b, m->charpos, m->bytepos); |
633 | XMARKER (start)->insertion_type = m->insertion_type; | |
04e4cb3a | 634 | |
c644523b DA |
635 | eassert (MARKERP (list->end)); |
636 | m = XMARKER (list->end); | |
fa691a83 DA |
637 | end = build_marker (b, m->charpos, m->bytepos); |
638 | XMARKER (end)->insertion_type = m->insertion_type; | |
177c0ea7 | 639 | |
c644523b | 640 | overlay = build_overlay (start, end, Fcopy_sequence (list->plist)); |
2410d73a SM |
641 | if (tail) |
642 | tail = tail->next = XOVERLAY (overlay); | |
643 | else | |
644 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
645 | } |
646 | ||
2410d73a | 647 | return result; |
04e4cb3a | 648 | } |
177c0ea7 | 649 | |
0c94c8d6 PE |
650 | /* Set an appropriate overlay of B. */ |
651 | ||
b0ab8123 | 652 | static void |
0c94c8d6 PE |
653 | set_buffer_overlays_before (struct buffer *b, struct Lisp_Overlay *o) |
654 | { | |
655 | b->overlays_before = o; | |
656 | } | |
657 | ||
b0ab8123 | 658 | static void |
0c94c8d6 PE |
659 | set_buffer_overlays_after (struct buffer *b, struct Lisp_Overlay *o) |
660 | { | |
661 | b->overlays_after = o; | |
662 | } | |
04e4cb3a | 663 | |
7e9d5818 GM |
664 | /* Clone per-buffer values of buffer FROM. |
665 | ||
666 | Buffer TO gets the same per-buffer values as FROM, with the | |
667 | following exceptions: (1) TO's name is left untouched, (2) markers | |
668 | are copied and made to refer to TO, and (3) overlay lists are | |
669 | copied. */ | |
670 | ||
671 | static void | |
d3da34e0 | 672 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 673 | { |
7e9d5818 GM |
674 | int offset; |
675 | ||
52b852c7 | 676 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
7e9d5818 GM |
677 | { |
678 | Lisp_Object obj; | |
679 | ||
4b7cdc0e SM |
680 | /* Don't touch the `name' which should be unique for every buffer. */ |
681 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
682 | continue; | |
683 | ||
4ce60d2e | 684 | obj = per_buffer_value (from, offset); |
ce5b453a | 685 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
686 | { |
687 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
688 | |
689 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 690 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
691 | } |
692 | ||
4ce60d2e | 693 | set_per_buffer_value (to, offset, obj); |
7e9d5818 GM |
694 | } |
695 | ||
72af86bd | 696 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 697 | |
0c94c8d6 PE |
698 | set_buffer_overlays_before (to, copy_overlays (to, from->overlays_before)); |
699 | set_buffer_overlays_after (to, copy_overlays (to, from->overlays_after)); | |
02f28bbd | 700 | |
e1688f54 RS |
701 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
702 | and install that in TO. */ | |
39eb03f1 | 703 | bset_local_var_alist (to, buffer_lisp_local_variables (from, 1)); |
7e9d5818 GM |
704 | } |
705 | ||
cffc6f3b CY |
706 | |
707 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
708 | current, update these markers. */ | |
709 | ||
710 | static void | |
711 | record_buffer_markers (struct buffer *b) | |
712 | { | |
713 | if (! NILP (BVAR (b, pt_marker))) | |
714 | { | |
715 | Lisp_Object buffer; | |
716 | ||
717 | eassert (!NILP (BVAR (b, begv_marker))); | |
718 | eassert (!NILP (BVAR (b, zv_marker))); | |
719 | ||
720 | XSETBUFFER (buffer, b); | |
721 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
722 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
723 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
724 | } | |
725 | } | |
726 | ||
727 | ||
728 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
729 | current, fetch these values into B->begv etc. */ | |
730 | ||
731 | static void | |
732 | fetch_buffer_markers (struct buffer *b) | |
733 | { | |
734 | if (! NILP (BVAR (b, pt_marker))) | |
735 | { | |
736 | Lisp_Object m; | |
737 | ||
738 | eassert (!NILP (BVAR (b, begv_marker))); | |
739 | eassert (!NILP (BVAR (b, zv_marker))); | |
740 | ||
741 | m = BVAR (b, pt_marker); | |
742 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
743 | ||
744 | m = BVAR (b, begv_marker); | |
745 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
746 | ||
747 | m = BVAR (b, zv_marker); | |
748 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
749 | } | |
750 | } | |
751 | ||
752 | ||
7e9d5818 GM |
753 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
754 | 2, 3, | |
193c3837 | 755 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 756 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 757 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
758 | NAME should be a string which is not the name of an existing buffer. |
759 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
760 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 761 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 762 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 763 | { |
6b61353c | 764 | Lisp_Object buf, tem; |
7e9d5818 | 765 | struct buffer *b; |
336cd056 | 766 | |
6b61353c | 767 | CHECK_STRING (name); |
336cd056 RS |
768 | buf = Fget_buffer (name); |
769 | if (!NILP (buf)) | |
d5db4077 | 770 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 771 | |
6b61353c | 772 | tem = base_buffer; |
336cd056 RS |
773 | base_buffer = Fget_buffer (base_buffer); |
774 | if (NILP (base_buffer)) | |
6b61353c | 775 | error ("No such buffer: `%s'", SDATA (tem)); |
e578f381 | 776 | if (!BUFFER_LIVE_P (XBUFFER (base_buffer))) |
6b61353c | 777 | error ("Base buffer has been killed"); |
336cd056 | 778 | |
d5db4077 | 779 | if (SCHARS (name) == 0) |
336cd056 RS |
780 | error ("Empty string for buffer name is not allowed"); |
781 | ||
cc648cef | 782 | b = allocate_buffer (); |
336cd056 | 783 | |
9928463d DA |
784 | /* No double indirection - if base buffer is indirect, |
785 | new buffer becomes an indirect to base's base. */ | |
67ee9f6e SM |
786 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
787 | ? XBUFFER (base_buffer)->base_buffer | |
788 | : XBUFFER (base_buffer)); | |
336cd056 RS |
789 | |
790 | /* Use the base buffer's text object. */ | |
791 | b->text = b->base_buffer->text; | |
9928463d DA |
792 | /* We have no own text. */ |
793 | b->indirections = -1; | |
794 | /* Notify base buffer that we share the text now. */ | |
795 | b->base_buffer->indirections++; | |
98a07056 DA |
796 | /* Always -1 for an indirect buffer. */ |
797 | b->window_count = -1; | |
336cd056 | 798 | |
cffc6f3b CY |
799 | b->pt = b->base_buffer->pt; |
800 | b->begv = b->base_buffer->begv; | |
801 | b->zv = b->base_buffer->zv; | |
802 | b->pt_byte = b->base_buffer->pt_byte; | |
803 | b->begv_byte = b->base_buffer->begv_byte; | |
804 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
805 | |
806 | b->newline_cache = 0; | |
807 | b->width_run_cache = 0; | |
e30b79c1 | 808 | b->bidi_paragraph_cache = 0; |
39eb03f1 | 809 | bset_width_table (b, Qnil); |
336cd056 | 810 | |
336cd056 | 811 | name = Fcopy_sequence (name); |
0c94c8d6 | 812 | set_string_intervals (name, NULL); |
39eb03f1 | 813 | bset_name (b, name); |
336cd056 RS |
814 | |
815 | reset_buffer (b); | |
13de9290 | 816 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
817 | |
818 | /* Put this in the alist of all live buffers. */ | |
819 | XSETBUFFER (buf, b); | |
6c6f1994 | 820 | Vbuffer_alist = nconc2 (Vbuffer_alist, list1 (Fcons (name, buf))); |
336cd056 | 821 | |
39eb03f1 | 822 | bset_mark (b, Fmake_marker ()); |
336cd056 | 823 | |
abc9d959 | 824 | /* The multibyte status belongs to the base buffer. */ |
39eb03f1 PE |
825 | bset_enable_multibyte_characters |
826 | (b, BVAR (b->base_buffer, enable_multibyte_characters)); | |
abc9d959 | 827 | |
336cd056 | 828 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 829 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 830 | { |
2aa46d6c CY |
831 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
832 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 833 | |
39eb03f1 PE |
834 | bset_pt_marker (b->base_buffer, |
835 | build_marker (b->base_buffer, b->base_buffer->pt, | |
836 | b->base_buffer->pt_byte)); | |
657924ff | 837 | |
39eb03f1 PE |
838 | bset_begv_marker (b->base_buffer, |
839 | build_marker (b->base_buffer, b->base_buffer->begv, | |
840 | b->base_buffer->begv_byte)); | |
cffc6f3b | 841 | |
39eb03f1 PE |
842 | bset_zv_marker (b->base_buffer, |
843 | build_marker (b->base_buffer, b->base_buffer->zv, | |
844 | b->base_buffer->zv_byte)); | |
cffc6f3b | 845 | |
4b4deea2 | 846 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
847 | } |
848 | ||
7e9d5818 GM |
849 | if (NILP (clone)) |
850 | { | |
851 | /* Give the indirect buffer markers for its narrowing. */ | |
39eb03f1 PE |
852 | bset_pt_marker (b, build_marker (b, b->pt, b->pt_byte)); |
853 | bset_begv_marker (b, build_marker (b, b->begv, b->begv_byte)); | |
854 | bset_zv_marker (b, build_marker (b, b->zv, b->zv_byte)); | |
4b4deea2 | 855 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
856 | } |
857 | else | |
7fa57e45 RS |
858 | { |
859 | struct buffer *old_b = current_buffer; | |
860 | ||
861 | clone_per_buffer_values (b->base_buffer, b); | |
39eb03f1 PE |
862 | bset_filename (b, Qnil); |
863 | bset_file_truename (b, Qnil); | |
864 | bset_display_count (b, make_number (0)); | |
865 | bset_backed_up (b, Qnil); | |
866 | bset_auto_save_file_name (b, Qnil); | |
7fa57e45 RS |
867 | set_buffer_internal_1 (b); |
868 | Fset (intern ("buffer-save-without-query"), Qnil); | |
869 | Fset (intern ("buffer-file-number"), Qnil); | |
870 | Fset (intern ("buffer-stale-function"), Qnil); | |
871 | set_buffer_internal_1 (old_b); | |
872 | } | |
336cd056 | 873 | |
9397e56f MR |
874 | /* Run buffer-list-update-hook. */ |
875 | if (!NILP (Vrun_hooks)) | |
876 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
877 | ||
a9ee7a59 | 878 | return buf; |
1ab256cb RM |
879 | } |
880 | ||
041a49a6 DA |
881 | /* Mark OV as no longer associated with B. */ |
882 | ||
883 | static void | |
884 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
885 | { | |
c644523b DA |
886 | eassert (b == XBUFFER (Fmarker_buffer (ov->start))); |
887 | modify_overlay (b, marker_position (ov->start), | |
888 | marker_position (ov->end)); | |
bc923770 DA |
889 | unchain_marker (XMARKER (ov->start)); |
890 | unchain_marker (XMARKER (ov->end)); | |
041a49a6 DA |
891 | |
892 | } | |
893 | ||
894 | /* Delete all overlays of B and reset it's overlay lists. */ | |
895 | ||
d4f5719a | 896 | void |
d3da34e0 | 897 | delete_all_overlays (struct buffer *b) |
d4f5719a | 898 | { |
041a49a6 | 899 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 900 | |
389a94a5 SM |
901 | /* FIXME: Since each drop_overlay will scan BUF_MARKERS to unlink its |
902 | markers, we have an unneeded O(N^2) behavior here. */ | |
fd318b54 | 903 | for (ov = b->overlays_before; ov; ov = next) |
d4f5719a | 904 | { |
041a49a6 DA |
905 | drop_overlay (b, ov); |
906 | next = ov->next; | |
907 | ov->next = NULL; | |
d4f5719a | 908 | } |
041a49a6 | 909 | |
fd318b54 | 910 | for (ov = b->overlays_after; ov; ov = next) |
d4f5719a | 911 | { |
041a49a6 DA |
912 | drop_overlay (b, ov); |
913 | next = ov->next; | |
914 | ov->next = NULL; | |
d4f5719a | 915 | } |
041a49a6 | 916 | |
0c94c8d6 PE |
917 | set_buffer_overlays_before (b, NULL); |
918 | set_buffer_overlays_after (b, NULL); | |
d4f5719a SM |
919 | } |
920 | ||
bcd40520 | 921 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 922 | and local variables. |
d4f5719a SM |
923 | If called on an already-initialized buffer, the list of overlays |
924 | should be deleted before calling this function, otherwise we end up | |
925 | with overlays that claim to belong to the buffer but the buffer | |
926 | claims it doesn't belong to it. */ | |
1ab256cb RM |
927 | |
928 | void | |
d3da34e0 | 929 | reset_buffer (register struct buffer *b) |
1ab256cb | 930 | { |
39eb03f1 PE |
931 | bset_filename (b, Qnil); |
932 | bset_file_truename (b, Qnil); | |
933 | bset_directory (b, current_buffer ? BVAR (current_buffer, directory) : Qnil); | |
43aac990 | 934 | b->modtime = make_timespec (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 935 | b->modtime_size = -1; |
4b4deea2 | 936 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 937 | b->last_window_start = 1; |
8b264726 | 938 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
939 | b->clip_changed = 0; |
940 | b->prevent_redisplay_optimizations_p = 1; | |
39eb03f1 | 941 | bset_backed_up (b, Qnil); |
0b5397c2 | 942 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 943 | b->auto_save_failure_time = 0; |
39eb03f1 PE |
944 | bset_auto_save_file_name (b, Qnil); |
945 | bset_read_only (b, Qnil); | |
0c94c8d6 PE |
946 | set_buffer_overlays_before (b, NULL); |
947 | set_buffer_overlays_after (b, NULL); | |
c2d5b10f | 948 | b->overlay_center = BEG; |
39eb03f1 PE |
949 | bset_mark_active (b, Qnil); |
950 | bset_point_before_scroll (b, Qnil); | |
951 | bset_file_format (b, Qnil); | |
952 | bset_auto_save_file_format (b, Qt); | |
953 | bset_last_selected_window (b, Qnil); | |
954 | bset_display_count (b, make_number (0)); | |
955 | bset_display_time (b, Qnil); | |
956 | bset_enable_multibyte_characters | |
957 | (b, BVAR (&buffer_defaults, enable_multibyte_characters)); | |
958 | bset_cursor_type (b, BVAR (&buffer_defaults, cursor_type)); | |
959 | bset_extra_line_spacing (b, BVAR (&buffer_defaults, extra_line_spacing)); | |
0522997d RS |
960 | |
961 | b->display_error_modiff = 0; | |
1ab256cb RM |
962 | } |
963 | ||
bcd40520 RS |
964 | /* Reset buffer B's local variables info. |
965 | Don't use this on a buffer that has already been in use; | |
966 | it does not treat permanent locals consistently. | |
13de9290 RS |
967 | Instead, use Fkill_all_local_variables. |
968 | ||
37ef52bb PE |
969 | If PERMANENT_TOO, reset permanent buffer-local variables. |
970 | If not, preserve those. */ | |
bcd40520 | 971 | |
13de9290 | 972 | static void |
37ef52bb | 973 | reset_buffer_local_variables (struct buffer *b, bool permanent_too) |
1ab256cb | 974 | { |
37ef52bb | 975 | int offset, i; |
1ab256cb RM |
976 | |
977 | /* Reset the major mode to Fundamental, together with all the | |
978 | things that depend on the major mode. | |
979 | default-major-mode is handled at a higher level. | |
980 | We ignore it here. */ | |
39eb03f1 PE |
981 | bset_major_mode (b, Qfundamental_mode); |
982 | bset_keymap (b, Qnil); | |
983 | bset_mode_name (b, QSFundamental); | |
984 | bset_minor_modes (b, Qnil); | |
3446af9c RS |
985 | |
986 | /* If the standard case table has been altered and invalidated, | |
987 | fix up its insides first. */ | |
988 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
989 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
990 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
991 | Fset_standard_case_table (Vascii_downcase_table); | |
992 | ||
39eb03f1 PE |
993 | bset_downcase_table (b, Vascii_downcase_table); |
994 | bset_upcase_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[0]); | |
995 | bset_case_canon_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[1]); | |
996 | bset_case_eqv_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[2]); | |
997 | bset_invisibility_spec (b, Qt); | |
3cb719bd | 998 | |
13de9290 | 999 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 1000 | if (permanent_too) |
39eb03f1 | 1001 | bset_local_var_alist (b, Qnil); |
3709505e SM |
1002 | else |
1003 | { | |
2f7a359d | 1004 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 1005 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 1006 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
1007 | { |
1008 | /* If permanent-local, keep it. */ | |
1009 | last = tmp; | |
1010 | if (EQ (prop, Qpermanent_local_hook)) | |
1011 | { | |
1012 | /* This is a partially permanent hook variable. | |
1013 | Preserve only the elements that want to be preserved. */ | |
1014 | Lisp_Object list, newlist; | |
1015 | list = XCDR (XCAR (tmp)); | |
1016 | if (!CONSP (list)) | |
1017 | newlist = list; | |
1018 | else | |
1019 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
1020 | { | |
1021 | Lisp_Object elt = XCAR (list); | |
1022 | /* Preserve element ELT if it's t, | |
1023 | if it is a function with a `permanent-local-hook' property, | |
1024 | or if it's not a symbol. */ | |
1025 | if (! SYMBOLP (elt) | |
1026 | || EQ (elt, Qt) | |
1027 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
1028 | newlist = Fcons (elt, newlist); | |
1029 | } | |
1030 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
1031 | } | |
1032 | } | |
1033 | /* Delete this local variable. */ | |
3709505e | 1034 | else if (NILP (last)) |
39eb03f1 | 1035 | bset_local_var_alist (b, XCDR (tmp)); |
3709505e SM |
1036 | else |
1037 | XSETCDR (last, XCDR (tmp)); | |
1038 | } | |
1039 | ||
7313acd0 | 1040 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 1041 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 1042 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 1043 | |
36429c89 | 1044 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 1045 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 1046 | { |
7313acd0 | 1047 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
1048 | if ((idx > 0 |
1049 | && (permanent_too | |
ce5b453a | 1050 | || buffer_permanent_local_flags[idx] == 0))) |
4ce60d2e | 1051 | set_per_buffer_value (b, offset, per_buffer_default (offset)); |
aab80822 | 1052 | } |
1ab256cb RM |
1053 | } |
1054 | ||
01050cb5 RM |
1055 | /* We split this away from generate-new-buffer, because rename-buffer |
1056 | and set-visited-file-name ought to be able to use this to really | |
1057 | rename the buffer properly. */ | |
1058 | ||
a7ca3326 | 1059 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 1060 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 1061 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
1062 | If there is no live buffer named NAME, then return NAME. |
1063 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 1064 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 1065 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
1066 | it is in the sequence to be tried) even if a buffer with that name exists. |
1067 | ||
1068 | If NAME begins with a space (i.e., a buffer that is not normally | |
1069 | visible to users), then if buffer NAME already exists a random number | |
1070 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 1071 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 1072 | { |
8e4fd1e1 | 1073 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
1074 | ptrdiff_t count; |
1075 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 1076 | |
b7826503 | 1077 | CHECK_STRING (name); |
1ab256cb | 1078 | |
6b61353c KH |
1079 | tem = Fstring_equal (name, ignore); |
1080 | if (!NILP (tem)) | |
1081 | return name; | |
1ab256cb | 1082 | tem = Fget_buffer (name); |
265a9e55 | 1083 | if (NILP (tem)) |
01050cb5 | 1084 | return name; |
1ab256cb | 1085 | |
8e4fd1e1 GM |
1086 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
1087 | { | |
1088 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 1089 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 1090 | (number, "-%"pI"d", |
a8290ec3 | 1091 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
1092 | tem = Fget_buffer (tem2); |
1093 | if (NILP (tem)) | |
1094 | return tem2; | |
1095 | } | |
1096 | else | |
1097 | tem2 = name; | |
1098 | ||
1ab256cb RM |
1099 | count = 1; |
1100 | while (1) | |
1101 | { | |
a8290ec3 DA |
1102 | gentemp = concat2 (tem2, make_formatted_string |
1103 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 1104 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
1105 | if (!NILP (tem)) |
1106 | return gentemp; | |
1ab256cb | 1107 | tem = Fget_buffer (gentemp); |
265a9e55 | 1108 | if (NILP (tem)) |
01050cb5 | 1109 | return gentemp; |
1ab256cb RM |
1110 | } |
1111 | } | |
1112 | ||
1113 | \f | |
a7ca3326 | 1114 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 1115 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
1116 | BUFFER defaults to the current buffer. |
1117 | Return nil if BUFFER has been killed. */) | |
5842a27b | 1118 | (register Lisp_Object buffer) |
1ab256cb | 1119 | { |
265a9e55 | 1120 | if (NILP (buffer)) |
4b4deea2 | 1121 | return BVAR (current_buffer, name); |
b7826503 | 1122 | CHECK_BUFFER (buffer); |
4b4deea2 | 1123 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
1124 | } |
1125 | ||
a7ca3326 | 1126 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
1127 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
1128 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 1129 | (register Lisp_Object buffer) |
1ab256cb | 1130 | { |
265a9e55 | 1131 | if (NILP (buffer)) |
4b4deea2 | 1132 | return BVAR (current_buffer, filename); |
b7826503 | 1133 | CHECK_BUFFER (buffer); |
4b4deea2 | 1134 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
1135 | } |
1136 | ||
336cd056 RS |
1137 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
1138 | 0, 1, 0, | |
7ee72033 | 1139 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
1140 | If BUFFER is not indirect, return nil. |
1141 | BUFFER defaults to the current buffer. */) | |
5842a27b | 1142 | (register Lisp_Object buffer) |
336cd056 RS |
1143 | { |
1144 | struct buffer *base; | |
1145 | Lisp_Object base_buffer; | |
1146 | ||
1147 | if (NILP (buffer)) | |
1148 | base = current_buffer->base_buffer; | |
1149 | else | |
1150 | { | |
b7826503 | 1151 | CHECK_BUFFER (buffer); |
336cd056 RS |
1152 | base = XBUFFER (buffer)->base_buffer; |
1153 | } | |
1154 | ||
1155 | if (! base) | |
1156 | return Qnil; | |
1157 | XSETBUFFER (base_buffer, base); | |
1158 | return base_buffer; | |
1159 | } | |
1160 | ||
a7ca3326 | 1161 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 1162 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
1163 | doc: /* Return the value of VARIABLE in BUFFER. |
1164 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
8917710e | 1165 | is the default binding of the variable. */) |
5842a27b | 1166 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 | 1167 | { |
8917710e | 1168 | register Lisp_Object result = buffer_local_value (variable, buffer); |
5f2c76c6 CY |
1169 | |
1170 | if (EQ (result, Qunbound)) | |
1171 | xsignal1 (Qvoid_variable, variable); | |
1172 | ||
1173 | return result; | |
1174 | } | |
1175 | ||
1176 | ||
1177 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
1178 | locally unbound. */ | |
1179 | ||
1180 | Lisp_Object | |
8917710e | 1181 | buffer_local_value (Lisp_Object variable, Lisp_Object buffer) |
79aa712d RS |
1182 | { |
1183 | register struct buffer *buf; | |
1184 | register Lisp_Object result; | |
ad97b375 | 1185 | struct Lisp_Symbol *sym; |
79aa712d | 1186 | |
5e2ad10b | 1187 | CHECK_SYMBOL (variable); |
ae69175b | 1188 | CHECK_BUFFER (buffer); |
79aa712d | 1189 | buf = XBUFFER (buffer); |
ce5b453a | 1190 | sym = XSYMBOL (variable); |
79aa712d | 1191 | |
ce5b453a SM |
1192 | start: |
1193 | switch (sym->redirect) | |
f0bac7de | 1194 | { |
ce5b453a SM |
1195 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
1196 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
1197 | case SYMBOL_LOCALIZED: | |
1198 | { /* Look in local_var_alist. */ | |
1199 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
1200 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 1201 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
1202 | if (!NILP (result)) |
1203 | { | |
1204 | if (blv->fwd) | |
1205 | { /* What binding is loaded right now? */ | |
1206 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 1207 | |
ce5b453a SM |
1208 | /* The value of the currently loaded binding is not |
1209 | stored in it, but rather in the realvalue slot. | |
1210 | Store that value into the binding it belongs to | |
1211 | in case that is the one we are about to use. */ | |
f0bac7de | 1212 | |
ce5b453a SM |
1213 | XSETCDR (current_alist_element, |
1214 | do_symval_forwarding (blv->fwd)); | |
1215 | } | |
1216 | /* Now get the (perhaps updated) value out of the binding. */ | |
1217 | result = XCDR (result); | |
1218 | } | |
1219 | else | |
1220 | result = Fdefault_value (variable); | |
1221 | break; | |
1222 | } | |
1223 | case SYMBOL_FORWARDED: | |
1224 | { | |
1225 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1226 | if (BUFFER_OBJFWDP (fwd)) | |
4ce60d2e | 1227 | result = per_buffer_value (buf, XBUFFER_OBJFWD (fwd)->offset); |
ce5b453a SM |
1228 | else |
1229 | result = Fdefault_value (variable); | |
1230 | break; | |
1231 | } | |
1088b922 | 1232 | default: emacs_abort (); |
f0bac7de | 1233 | } |
79aa712d | 1234 | |
5f2c76c6 | 1235 | return result; |
79aa712d RS |
1236 | } |
1237 | ||
e1688f54 | 1238 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1239 | buffer BUF. That is, don't include the variables maintained |
8a05d57a | 1240 | in special slots in the buffer object. |
37ef52bb | 1241 | If not CLONE, replace elements of the form (VAR . unbound) |
8a05d57a | 1242 | by VAR. */ |
e1688f54 RS |
1243 | |
1244 | static Lisp_Object | |
37ef52bb | 1245 | buffer_lisp_local_variables (struct buffer *buf, bool clone) |
e1688f54 RS |
1246 | { |
1247 | Lisp_Object result = Qnil; | |
37ef52bb | 1248 | Lisp_Object tail; |
4b4deea2 | 1249 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1250 | { |
1251 | Lisp_Object val, elt; | |
1252 | ||
1253 | elt = XCAR (tail); | |
1254 | ||
1255 | /* Reference each variable in the alist in buf. | |
1256 | If inquiring about the current buffer, this gets the current values, | |
1257 | so store them into the alist so the alist is up to date. | |
1258 | If inquiring about some other buffer, this swaps out any values | |
1259 | for that buffer, making the alist up to date automatically. */ | |
1260 | val = find_symbol_value (XCAR (elt)); | |
1261 | /* Use the current buffer value only if buf is the current buffer. */ | |
1262 | if (buf != current_buffer) | |
1263 | val = XCDR (elt); | |
1264 | ||
8a05d57a | 1265 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1266 | ? XCAR (elt) |
1267 | : Fcons (XCAR (elt), val), | |
1268 | result); | |
e1688f54 RS |
1269 | } |
1270 | ||
1271 | return result; | |
1272 | } | |
1273 | ||
1ab256cb | 1274 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1275 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1276 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1277 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1278 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1279 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1280 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1281 | (register Lisp_Object buffer) |
1ab256cb RM |
1282 | { |
1283 | register struct buffer *buf; | |
553defa4 | 1284 | register Lisp_Object result; |
1ab256cb | 1285 | |
265a9e55 | 1286 | if (NILP (buffer)) |
1ab256cb RM |
1287 | buf = current_buffer; |
1288 | else | |
1289 | { | |
b7826503 | 1290 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1291 | buf = XBUFFER (buffer); |
1292 | } | |
1293 | ||
8a05d57a | 1294 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1295 | |
1ab256cb RM |
1296 | /* Add on all the variables stored in special slots. */ |
1297 | { | |
7c02e886 | 1298 | int offset, idx; |
1ab256cb | 1299 | |
52b852c7 | 1300 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1301 | { |
7313acd0 GM |
1302 | idx = PER_BUFFER_IDX (offset); |
1303 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1304 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1305 | { |
1306 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
4ce60d2e | 1307 | Lisp_Object val = per_buffer_value (buf, offset); |
0992bd9c CY |
1308 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), |
1309 | result); | |
1310 | } | |
1ab256cb RM |
1311 | } |
1312 | } | |
553defa4 RS |
1313 | |
1314 | return result; | |
1ab256cb | 1315 | } |
1ab256cb | 1316 | \f |
a7ca3326 | 1317 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1318 | 0, 1, 0, |
7ee72033 MB |
1319 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1320 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1321 | (register Lisp_Object buffer) |
1ab256cb RM |
1322 | { |
1323 | register struct buffer *buf; | |
265a9e55 | 1324 | if (NILP (buffer)) |
1ab256cb RM |
1325 | buf = current_buffer; |
1326 | else | |
1327 | { | |
b7826503 | 1328 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1329 | buf = XBUFFER (buffer); |
1330 | } | |
1331 | ||
336cd056 | 1332 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1333 | } |
1334 | ||
ecda65d4 SM |
1335 | DEFUN ("force-mode-line-update", Fforce_mode_line_update, |
1336 | Sforce_mode_line_update, 0, 1, 0, | |
1337 | doc: /* Force redisplay of the current buffer's mode line and header line. | |
1338 | With optional non-nil ALL, force redisplay of all mode lines and | |
1339 | header lines. This function also forces recomputation of the | |
1340 | menu bar menus and the frame title. */) | |
1341 | (Lisp_Object all) | |
1342 | { | |
655ab9a3 | 1343 | if (!NILP (all)) |
ecda65d4 SM |
1344 | { |
1345 | update_mode_lines = 10; | |
655ab9a3 SM |
1346 | /* FIXME: This can't be right. */ |
1347 | current_buffer->prevent_redisplay_optimizations_p = true; | |
1348 | } | |
1349 | else if (buffer_window_count (current_buffer)) | |
1350 | { | |
1351 | bset_update_mode_line (current_buffer); | |
1352 | current_buffer->prevent_redisplay_optimizations_p = true; | |
ecda65d4 | 1353 | } |
bd7cd30a | 1354 | return all; |
ecda65d4 SM |
1355 | } |
1356 | ||
a7ca3326 | 1357 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1358 | 1, 1, 0, |
7ee72033 MB |
1359 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1360 | A non-nil FLAG means mark the buffer modified. */) | |
37ef52bb | 1361 | (Lisp_Object flag) |
1ab256cb | 1362 | { |
ecda65d4 SM |
1363 | Frestore_buffer_modified_p (flag); |
1364 | ||
1365 | /* Set update_mode_lines only if buffer is displayed in some window. | |
1366 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1367 | state by recording/restoring the state around blocks of code. | |
1368 | Setting update_mode_lines makes redisplay consider all windows | |
1369 | (on all frames). Stealth fontification of buffers not displayed | |
1370 | would incur additional redisplay costs if we'd set | |
1371 | update_modes_lines unconditionally. | |
1372 | ||
1373 | Ideally, I think there should be another mechanism for fontifying | |
1374 | buffers without "modifying" buffers, or redisplay should be | |
1375 | smarter about updating the `*' in mode lines. --gerd */ | |
bd7cd30a | 1376 | return Fforce_mode_line_update (Qnil); |
ecda65d4 SM |
1377 | } |
1378 | ||
1379 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, | |
1380 | Srestore_buffer_modified_p, 1, 1, 0, | |
1381 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. | |
1382 | It is not ensured that mode lines will be updated to show the modified | |
1383 | state of the current buffer. Use with care. */) | |
1384 | (Lisp_Object flag) | |
1385 | { | |
ecda65d4 SM |
1386 | Lisp_Object fn; |
1387 | ||
1ab256cb RM |
1388 | /* If buffer becoming modified, lock the file. |
1389 | If buffer becoming unmodified, unlock the file. */ | |
1390 | ||
82f8cd94 CY |
1391 | struct buffer *b = current_buffer->base_buffer |
1392 | ? current_buffer->base_buffer | |
1393 | : current_buffer; | |
1394 | ||
1395 | fn = BVAR (b, file_truename); | |
90d456d2 | 1396 | /* Test buffer-file-name so that binding it to nil is effective. */ |
82f8cd94 | 1397 | if (!NILP (fn) && ! NILP (BVAR (b, filename))) |
1ab256cb | 1398 | { |
37ef52bb | 1399 | bool already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1400 | if (!already && !NILP (flag)) |
1ab256cb | 1401 | lock_file (fn); |
265a9e55 | 1402 | else if (already && NILP (flag)) |
1ab256cb RM |
1403 | unlock_file (fn); |
1404 | } | |
1ab256cb | 1405 | |
0b5397c2 SM |
1406 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1407 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1408 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1409 | modify SAVE_MODIFF to affect one, we may affect the other | |
1410 | as well. | |
1411 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1412 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1413 | recent-auto-save-p from t to nil. | |
1414 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1415 | we risk changing recent-auto-save-p from nil to t. */ | |
1416 | SAVE_MODIFF = (NILP (flag) | |
1417 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1418 | ? MODIFF | |
1419 | /* Let's try to preserve recent-auto-save-p. */ | |
1420 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1421 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1422 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1423 | or increase MODIFF. */ | |
1424 | : MODIFF++); | |
177c0ea7 | 1425 | |
a8c21b48 GM |
1426 | return flag; |
1427 | } | |
1428 | ||
1ab256cb | 1429 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1430 | 0, 1, 0, |
7ee72033 | 1431 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1432 | Each buffer has a tick counter which is incremented each time the |
1433 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1434 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1435 | (register Lisp_Object buffer) |
1ab256cb RM |
1436 | { |
1437 | register struct buffer *buf; | |
265a9e55 | 1438 | if (NILP (buffer)) |
1ab256cb RM |
1439 | buf = current_buffer; |
1440 | else | |
1441 | { | |
b7826503 | 1442 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1443 | buf = XBUFFER (buffer); |
1444 | } | |
1445 | ||
1446 | return make_number (BUF_MODIFF (buf)); | |
1447 | } | |
3e145152 CY |
1448 | |
1449 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1450 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1451 | doc: /* Return BUFFER's character-change tick counter. | |
1452 | Each buffer has a character-change tick counter, which is set to the | |
1453 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1454 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1455 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1456 | you can tell whether a character change occurred in that buffer in |
1457 | between these calls. No argument or nil as argument means use current | |
1458 | buffer as BUFFER. */) | |
5842a27b | 1459 | (register Lisp_Object buffer) |
3e145152 CY |
1460 | { |
1461 | register struct buffer *buf; | |
1462 | if (NILP (buffer)) | |
1463 | buf = current_buffer; | |
1464 | else | |
1465 | { | |
1466 | CHECK_BUFFER (buffer); | |
1467 | buf = XBUFFER (buffer); | |
1468 | } | |
1469 | ||
1470 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1471 | } | |
1ab256cb | 1472 | \f |
01050cb5 | 1473 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1474 | "(list (read-string \"Rename buffer (to new name): \" \ |
1475 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1476 | current-prefix-arg)", | |
7ee72033 | 1477 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1478 | If second arg UNIQUE is nil or omitted, it is an error if a |
1479 | buffer named NEWNAME already exists. | |
1480 | If UNIQUE is non-nil, come up with a new name using | |
1481 | `generate-new-buffer-name'. | |
1482 | Interactively, you can set UNIQUE with a prefix argument. | |
1483 | We return the name we actually gave the buffer. | |
7ee72033 | 1484 | This does not change the name of the visited file (if any). */) |
5842a27b | 1485 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1486 | { |
1487 | register Lisp_Object tem, buf; | |
1488 | ||
b7826503 | 1489 | CHECK_STRING (newname); |
d59698c4 | 1490 | |
d5db4077 | 1491 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1492 | error ("Empty string is invalid as a buffer name"); |
1493 | ||
489c043a | 1494 | tem = Fget_buffer (newname); |
265a9e55 | 1495 | if (!NILP (tem)) |
01050cb5 | 1496 | { |
8801a864 KR |
1497 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1498 | rename the buffer automatically so you can create another | |
1499 | with the original name. It makes UNIQUE equivalent to | |
1500 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1501 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1502 | return BVAR (current_buffer, name); |
3bd779aa | 1503 | if (!NILP (unique)) |
4b4deea2 | 1504 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1505 | else |
d5db4077 | 1506 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1507 | } |
1ab256cb | 1508 | |
39eb03f1 | 1509 | bset_name (current_buffer, newname); |
76f590d7 JB |
1510 | |
1511 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1512 | any windows displaying current_buffer will stay unchanged. */ | |
2ec9db5d | 1513 | update_mode_lines = 11; |
76f590d7 | 1514 | |
67180c6a | 1515 | XSETBUFFER (buf, current_buffer); |
489c043a | 1516 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1517 | if (NILP (BVAR (current_buffer, filename)) |
1518 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1519 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1520 | |
1521 | /* Run buffer-list-update-hook. */ | |
1522 | if (!NILP (Vrun_hooks)) | |
1523 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1524 | ||
fb5eba9c | 1525 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1526 | return BVAR (current_buffer, name); |
1ab256cb RM |
1527 | } |
1528 | ||
ed08365b DA |
1529 | /* True if B can be used as 'other-than-BUFFER' buffer. */ |
1530 | ||
1531 | static bool | |
1532 | candidate_buffer (Lisp_Object b, Lisp_Object buffer) | |
1533 | { | |
1534 | return (BUFFERP (b) && !EQ (b, buffer) | |
1535 | && BUFFER_LIVE_P (XBUFFER (b)) | |
1536 | && !BUFFER_HIDDEN_P (XBUFFER (b))); | |
1537 | } | |
84575e67 | 1538 | |
a7ca3326 | 1539 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1540 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1541 | Buffers not visible in windows are preferred to visible buffers, unless |
1542 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1543 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1544 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1545 | frame's buffer list. | |
1546 | ||
1547 | The buffer is found by scanning the selected or specified frame's buffer | |
1548 | list first, followed by the list of all buffers. If no other buffer | |
1549 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1550 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1551 | { |
d9f07150 DA |
1552 | struct frame *f = decode_any_frame (frame); |
1553 | Lisp_Object tail = f->buffer_list, pred = f->buffer_predicate; | |
1554 | Lisp_Object buf, notsogood = Qnil; | |
1ab256cb | 1555 | |
9397e56f | 1556 | /* Consider buffers that have been seen in the frame first. */ |
9397e56f | 1557 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1558 | { |
9397e56f | 1559 | buf = XCAR (tail); |
ed08365b | 1560 | if (candidate_buffer (buf, buffer) |
9397e56f MR |
1561 | /* If the frame has a buffer_predicate, disregard buffers that |
1562 | don't fit the predicate. */ | |
1563 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1564 | { | |
1565 | if (!NILP (visible_ok) | |
1566 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1567 | return buf; | |
1568 | else if (NILP (notsogood)) | |
1569 | notsogood = buf; | |
1570 | } | |
7962a441 | 1571 | } |
7962a441 | 1572 | |
9397e56f | 1573 | /* Consider alist of all buffers next. */ |
8f3a2c26 | 1574 | FOR_EACH_LIVE_BUFFER (tail, buf) |
1ab256cb | 1575 | { |
ed08365b | 1576 | if (candidate_buffer (buf, buffer) |
9397e56f MR |
1577 | /* If the frame has a buffer_predicate, disregard buffers that |
1578 | don't fit the predicate. */ | |
1579 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1580 | { | |
1581 | if (!NILP (visible_ok) | |
1582 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1583 | return buf; | |
1584 | else if (NILP (notsogood)) | |
1585 | notsogood = buf; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | if (!NILP (notsogood)) | |
1590 | return notsogood; | |
1591 | else | |
1592 | { | |
1593 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1594 | if (NILP (buf)) |
04ae1b48 | 1595 | { |
9397e56f MR |
1596 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1597 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1598 | } |
9397e56f MR |
1599 | return buf; |
1600 | } | |
1601 | } | |
04ae1b48 | 1602 | |
9397e56f MR |
1603 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1604 | pay attention to any frame-local buffer lists, doesn't care about | |
1605 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1606 | ||
1607 | Lisp_Object | |
1608 | other_buffer_safely (Lisp_Object buffer) | |
1609 | { | |
9397e56f MR |
1610 | Lisp_Object tail, buf; |
1611 | ||
8f3a2c26 DA |
1612 | FOR_EACH_LIVE_BUFFER (tail, buf) |
1613 | if (candidate_buffer (buf, buffer)) | |
1614 | return buf; | |
9397e56f | 1615 | |
dba1a30a GM |
1616 | buf = Fget_buffer (build_string ("*scratch*")); |
1617 | if (NILP (buf)) | |
1618 | { | |
1619 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1620 | Fset_buffer_major_mode (buf); | |
1621 | } | |
9397e56f | 1622 | |
89132f25 | 1623 | return buf; |
1ab256cb RM |
1624 | } |
1625 | \f | |
a7ca3326 | 1626 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1627 | 0, 1, "", |
7ee72033 MB |
1628 | doc: /* Start keeping undo information for buffer BUFFER. |
1629 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1630 | (register Lisp_Object buffer) |
1ab256cb | 1631 | { |
ffd56f97 | 1632 | Lisp_Object real_buffer; |
1ab256cb | 1633 | |
ffd56f97 | 1634 | if (NILP (buffer)) |
67180c6a | 1635 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1636 | else |
1637 | { | |
ffd56f97 JB |
1638 | real_buffer = Fget_buffer (buffer); |
1639 | if (NILP (real_buffer)) | |
1640 | nsberror (buffer); | |
1ab256cb RM |
1641 | } |
1642 | ||
4b4deea2 | 1643 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
39eb03f1 | 1644 | bset_undo_list (XBUFFER (real_buffer), Qnil); |
1ab256cb RM |
1645 | |
1646 | return Qnil; | |
1647 | } | |
1648 | ||
9cd47b72 DA |
1649 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1650 | ||
37ef52bb | 1651 | void |
9cd47b72 DA |
1652 | compact_buffer (struct buffer *buffer) |
1653 | { | |
f0863a54 | 1654 | BUFFER_CHECK_INDIRECTION (buffer); |
9928463d | 1655 | |
9cd47b72 DA |
1656 | /* Skip dead buffers, indirect buffers and buffers |
1657 | which aren't changed since last compaction. */ | |
f0863a54 | 1658 | if (BUFFER_LIVE_P (buffer) |
9cd47b72 | 1659 | && (buffer->base_buffer == NULL) |
f9e7c67e | 1660 | && (BUF_COMPACT (buffer) != BUF_MODIFF (buffer))) |
9cd47b72 DA |
1661 | { |
1662 | /* If a buffer's undo list is Qt, that means that undo is | |
1663 | turned off in that buffer. Calling truncate_undo_list on | |
1664 | Qt tends to return NULL, which effectively turns undo back on. | |
1665 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1666 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1667 | truncate_undo_list (buffer); |
1668 | ||
1669 | /* Shrink buffer gaps. */ | |
1670 | if (!buffer->text->inhibit_shrinking) | |
1671 | { | |
1672 | /* If a buffer's gap size is more than 10% of the buffer | |
eefd7278 DA |
1673 | size, or larger than GAP_BYTES_DFL bytes, then shrink it |
1674 | accordingly. Keep a minimum size of GAP_BYTES_MIN bytes. */ | |
1675 | ptrdiff_t size = clip_to_bounds (GAP_BYTES_MIN, | |
1676 | BUF_Z_BYTE (buffer) / 10, | |
1677 | GAP_BYTES_DFL); | |
1678 | if (BUF_GAP_SIZE (buffer) > size) | |
1679 | make_gap_1 (buffer, -(BUF_GAP_SIZE (buffer) - size)); | |
9cd47b72 | 1680 | } |
f9e7c67e | 1681 | BUF_COMPACT (buffer) = BUF_MODIFF (buffer); |
9cd47b72 | 1682 | } |
9cd47b72 DA |
1683 | } |
1684 | ||
a7ca3326 | 1685 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1686 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1687 | The argument may be a buffer or the name of an existing buffer. |
1688 | Argument nil or omitted means kill the current buffer. Return t if the | |
1689 | buffer is actually killed, nil otherwise. | |
1690 | ||
b7e8d081 MR |
1691 | The functions in `kill-buffer-query-functions' are called with the |
1692 | buffer to be killed as the current buffer. If any of them returns nil, | |
1693 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1694 | buffer is actually killed. The buffer being killed will be current | |
1695 | while the hook is running. Functions called by any of these hooks are | |
1696 | supposed to not change the current buffer. | |
018ba359 PJ |
1697 | |
1698 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1699 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1700 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1701 | (Lisp_Object buffer_or_name) |
1ab256cb | 1702 | { |
c8804c4f | 1703 | Lisp_Object buffer; |
1ab256cb RM |
1704 | register struct buffer *b; |
1705 | register Lisp_Object tem; | |
1706 | register struct Lisp_Marker *m; | |
6af718a4 | 1707 | struct gcpro gcpro1; |
1ab256cb | 1708 | |
c8804c4f MR |
1709 | if (NILP (buffer_or_name)) |
1710 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1711 | else |
c8804c4f MR |
1712 | buffer = Fget_buffer (buffer_or_name); |
1713 | if (NILP (buffer)) | |
1714 | nsberror (buffer_or_name); | |
1ab256cb | 1715 | |
c8804c4f | 1716 | b = XBUFFER (buffer); |
1ab256cb | 1717 | |
4a4a9db5 | 1718 | /* Avoid trouble for buffer already dead. */ |
e578f381 | 1719 | if (!BUFFER_LIVE_P (b)) |
4a4a9db5 KH |
1720 | return Qnil; |
1721 | ||
dcdffbf6 | 1722 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1723 | { |
d311d28c | 1724 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1725 | Lisp_Object arglist[1]; |
1ab256cb RM |
1726 | |
1727 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1728 | set_buffer_internal (b); | |
dcdffbf6 RS |
1729 | |
1730 | /* First run the query functions; if any query is answered no, | |
1731 | don't kill the buffer. */ | |
5b20caf0 | 1732 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1733 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1734 | if (NILP (tem)) | |
5b20caf0 | 1735 | return unbind_to (count, Qnil); |
dcdffbf6 | 1736 | |
ef099a94 MN |
1737 | /* Query if the buffer is still modified. */ |
1738 | if (INTERACTIVE && !NILP (BVAR (b, filename)) | |
1739 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) | |
1740 | { | |
1741 | GCPRO1 (buffer); | |
1742 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", | |
1743 | BVAR (b, name), make_number (0))); | |
1744 | UNGCPRO; | |
1745 | if (NILP (tem)) | |
1746 | return unbind_to (count, Qnil); | |
1747 | } | |
1748 | ||
1749 | /* If the hooks have killed the buffer, exit now. */ | |
1750 | if (!BUFFER_LIVE_P (b)) | |
1751 | return unbind_to (count, Qt); | |
1752 | ||
dcdffbf6 | 1753 | /* Then run the hooks. */ |
f1597a3a | 1754 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1755 | unbind_to (count, Qnil); |
1756 | } | |
1757 | ||
b7e8d081 | 1758 | /* If the hooks have killed the buffer, exit now. */ |
e578f381 | 1759 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1760 | return Qt; |
1761 | ||
1ab256cb RM |
1762 | /* We have no more questions to ask. Verify that it is valid |
1763 | to kill the buffer. This must be done after the questions | |
1764 | since anything can happen within do_yes_or_no_p. */ | |
1765 | ||
1766 | /* Don't kill the minibuffer now current. */ | |
e74aeda8 | 1767 | if (EQ (buffer, XWINDOW (minibuf_window)->contents)) |
1ab256cb RM |
1768 | return Qnil; |
1769 | ||
9928463d DA |
1770 | /* When we kill an ordinary buffer which shares it's buffer text |
1771 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1772 | We do it at this stage so nothing terrible happens if they |
1773 | ask questions or their hooks get errors. */ | |
9928463d | 1774 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1775 | { |
1776 | struct buffer *other; | |
1777 | ||
c8804c4f | 1778 | GCPRO1 (buffer); |
336cd056 | 1779 | |
52b852c7 | 1780 | FOR_EACH_BUFFER (other) |
d17337e5 | 1781 | if (other->base_buffer == b) |
336cd056 | 1782 | { |
8f54f30a PE |
1783 | Lisp_Object buf; |
1784 | XSETBUFFER (buf, other); | |
1785 | Fkill_buffer (buf); | |
336cd056 RS |
1786 | } |
1787 | ||
1788 | UNGCPRO; | |
b7e8d081 MR |
1789 | |
1790 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
e578f381 | 1791 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1792 | return Qt; |
336cd056 | 1793 | } |
177c0ea7 | 1794 | |
56e2e794 MR |
1795 | /* Run replace_buffer_in_windows before making another buffer current |
1796 | since set-window-buffer-start-and-point will refuse to make another | |
1797 | buffer current if the selected window does not show the current | |
ecda65d4 | 1798 | buffer (bug#10114). */ |
56e2e794 MR |
1799 | replace_buffer_in_windows (buffer); |
1800 | ||
b7e8d081 | 1801 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
e578f381 | 1802 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1803 | return Qt; |
1804 | ||
1805 | /* Make this buffer not be current. Exit if it is the sole visible | |
1806 | buffer. */ | |
1ab256cb RM |
1807 | if (b == current_buffer) |
1808 | { | |
c8804c4f | 1809 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1810 | Fset_buffer (tem); |
1811 | if (b == current_buffer) | |
1812 | return Qnil; | |
1813 | } | |
1814 | ||
b7e8d081 MR |
1815 | /* If the buffer now current is shown in the minibuffer and our buffer |
1816 | is the sole other buffer give up. */ | |
77270fac | 1817 | XSETBUFFER (tem, current_buffer); |
e74aeda8 | 1818 | if (EQ (tem, XWINDOW (minibuf_window)->contents) |
b7e8d081 MR |
1819 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1820 | return Qnil; | |
77270fac | 1821 | |
1ab256cb RM |
1822 | /* Now there is no question: we can kill the buffer. */ |
1823 | ||
1ab256cb RM |
1824 | /* Unlock this buffer's file, if it is locked. */ |
1825 | unlock_buffer (b); | |
1ab256cb | 1826 | |
c8804c4f MR |
1827 | GCPRO1 (buffer); |
1828 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1829 | UNGCPRO; |
1830 | ||
b7e8d081 MR |
1831 | /* Killing buffer processes may run sentinels which may have killed |
1832 | our buffer. */ | |
e578f381 | 1833 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1834 | return Qt; |
49da74e6 | 1835 | |
9397e56f MR |
1836 | /* These may run Lisp code and into infinite loops (if someone |
1837 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1838 | frames_discard_buffer (buffer); |
1839 | ||
b93fb365 | 1840 | clear_charpos_cache (b); |
1ab256cb RM |
1841 | |
1842 | tem = Vinhibit_quit; | |
1843 | Vinhibit_quit = Qt; | |
9397e56f | 1844 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1845 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1846 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1847 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1848 | Vinhibit_quit = tem; |
1849 | ||
9cf712eb RS |
1850 | /* Delete any auto-save file, if we saved it in this session. |
1851 | But not if the buffer is modified. */ | |
4b4deea2 | 1852 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1853 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1854 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1855 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1856 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1857 | { |
8f54f30a PE |
1858 | Lisp_Object delete; |
1859 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1860 | if (! NILP (delete)) | |
4b4deea2 | 1861 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1862 | } |
1863 | ||
b7e8d081 | 1864 | /* Deleting an auto-save file could have killed our buffer. */ |
e578f381 | 1865 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1866 | return Qt; |
1867 | ||
4a4a9db5 KH |
1868 | if (b->base_buffer) |
1869 | { | |
5004c3bf | 1870 | INTERVAL i; |
d556ebf9 DA |
1871 | /* Unchain all markers that belong to this indirect buffer. |
1872 | Don't unchain the markers that belong to the base buffer | |
1873 | or its other indirect buffers. */ | |
1874 | struct Lisp_Marker **mp = &BUF_MARKERS (b); | |
1875 | while ((m = *mp)) | |
1876 | { | |
1877 | if (m->buffer == b) | |
1878 | { | |
1879 | m->buffer = NULL; | |
389a94a5 | 1880 | *mp = m->next; |
d556ebf9 DA |
1881 | } |
1882 | else | |
1883 | mp = &m->next; | |
1884 | } | |
5004c3bf DA |
1885 | /* Intervals should be owned by the base buffer (Bug#16502). */ |
1886 | i = buffer_intervals (b); | |
1887 | if (i) | |
1888 | { | |
1889 | Lisp_Object owner; | |
1890 | XSETBUFFER (owner, b->base_buffer); | |
1891 | set_interval_object (i, owner); | |
1892 | } | |
4a4a9db5 KH |
1893 | } |
1894 | else | |
1ab256cb | 1895 | { |
4a4a9db5 | 1896 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1897 | and leave them pointing nowhere. */ |
65745fad | 1898 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1899 | { |
65745fad | 1900 | struct Lisp_Marker *next = m->next; |
336cd056 | 1901 | m->buffer = 0; |
65745fad SM |
1902 | m->next = NULL; |
1903 | m = next; | |
336cd056 | 1904 | } |
65745fad | 1905 | BUF_MARKERS (b) = NULL; |
0c94c8d6 | 1906 | set_buffer_intervals (b, NULL); |
336cd056 | 1907 | |
389a94a5 | 1908 | /* Perhaps we should explicitly free the interval tree here... */ |
336cd056 | 1909 | } |
389a94a5 SM |
1910 | /* Since we've unlinked the markers, the overlays can't be here any more |
1911 | either. */ | |
1912 | b->overlays_before = NULL; | |
1913 | b->overlays_after = NULL; | |
33f7013e | 1914 | |
2f3f993b RS |
1915 | /* Reset the local variables, so that this buffer's local values |
1916 | won't be protected from GC. They would be protected | |
e4769531 | 1917 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1918 | This gets rid of them for certain. */ |
1919 | swap_out_buffer_local_variables (b); | |
13de9290 | 1920 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1921 | |
39eb03f1 | 1922 | bset_name (b, Qnil); |
336cd056 | 1923 | |
4d7e6e51 | 1924 | block_input (); |
04e9897c DA |
1925 | if (b->base_buffer) |
1926 | { | |
1927 | /* Notify our base buffer that we don't share the text anymore. */ | |
1928 | eassert (b->indirections == -1); | |
1929 | b->base_buffer->indirections--; | |
1930 | eassert (b->base_buffer->indirections >= 0); | |
98a07056 DA |
1931 | /* Make sure that we wasn't confused. */ |
1932 | eassert (b->window_count == -1); | |
04e9897c DA |
1933 | } |
1934 | else | |
98a07056 DA |
1935 | { |
1936 | /* Make sure that no one shows us. */ | |
1937 | eassert (b->window_count == 0); | |
1938 | /* No one shares our buffer text, can free it. */ | |
1939 | free_buffer_text (b); | |
1940 | } | |
336cd056 | 1941 | |
28e969dd JB |
1942 | if (b->newline_cache) |
1943 | { | |
1944 | free_region_cache (b->newline_cache); | |
1945 | b->newline_cache = 0; | |
1946 | } | |
1947 | if (b->width_run_cache) | |
1948 | { | |
1949 | free_region_cache (b->width_run_cache); | |
1950 | b->width_run_cache = 0; | |
1951 | } | |
e30b79c1 DA |
1952 | if (b->bidi_paragraph_cache) |
1953 | { | |
1954 | free_region_cache (b->bidi_paragraph_cache); | |
1955 | b->bidi_paragraph_cache = 0; | |
1956 | } | |
39eb03f1 | 1957 | bset_width_table (b, Qnil); |
4d7e6e51 | 1958 | unblock_input (); |
39eb03f1 | 1959 | bset_undo_list (b, Qnil); |
1ab256cb | 1960 | |
9397e56f MR |
1961 | /* Run buffer-list-update-hook. */ |
1962 | if (!NILP (Vrun_hooks)) | |
1963 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1964 | ||
1ab256cb RM |
1965 | return Qt; |
1966 | } | |
1967 | \f | |
9397e56f MR |
1968 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1969 | we do this each time BUFFER is selected visibly, the more recently | |
1970 | selected buffers are always closer to the front of those lists. This | |
1971 | means that other_buffer is more likely to choose a relevant buffer. | |
1972 | ||
1973 | Note that this moves BUFFER to the front of the buffer lists of the | |
1974 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1975 | shown in the selected frame, consider the present behavior a feature. | |
1976 | `select-window' gets this right since it shows BUFFER in the selected | |
1977 | window when calling us. */ | |
1ab256cb | 1978 | |
01136e9b | 1979 | void |
9397e56f | 1980 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1981 | { |
4475bec4 | 1982 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1983 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1984 | |
9397e56f | 1985 | CHECK_BUFFER (buffer); |
1ab256cb | 1986 | |
9397e56f MR |
1987 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1988 | Don't allow quitting since this might leave the buffer list in an | |
1989 | inconsistent state. */ | |
1990 | tem = Vinhibit_quit; | |
1991 | Vinhibit_quit = Qt; | |
1992 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1993 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1994 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1995 | XSETCDR (aelt_cons, Vbuffer_alist); |
1996 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1997 | Vinhibit_quit = tem; |
1ab256cb | 1998 | |
9397e56f | 1999 | /* Update buffer list of selected frame. */ |
f00af5b1 PE |
2000 | fset_buffer_list (f, Fcons (buffer, Fdelq (buffer, f->buffer_list))); |
2001 | fset_buried_buffer_list (f, Fdelq (buffer, f->buried_buffer_list)); | |
177c0ea7 | 2002 | |
9397e56f MR |
2003 | /* Run buffer-list-update-hook. */ |
2004 | if (!NILP (Vrun_hooks)) | |
2005 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
2006 | } | |
7962a441 | 2007 | |
7962a441 | 2008 | |
e4ed06f1 CY |
2009 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
2010 | buffer is killed. For the selected frame's buffer list this moves | |
2011 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 2012 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 2013 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 2014 | |
e4ed06f1 CY |
2015 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
2016 | 1, 1, 0, | |
2017 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
2018 | (Lisp_Object buffer) |
2019 | { | |
4475bec4 | 2020 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 2021 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 2022 | |
9397e56f | 2023 | CHECK_BUFFER (buffer); |
177c0ea7 | 2024 | |
9397e56f MR |
2025 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
2026 | Don't allow quitting since this might leave the buffer list in an | |
2027 | inconsistent state. */ | |
2028 | tem = Vinhibit_quit; | |
2029 | Vinhibit_quit = Qt; | |
2030 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 2031 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 2032 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
2033 | XSETCDR (aelt_cons, Qnil); |
2034 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
2035 | Vinhibit_quit = tem; |
2036 | ||
2037 | /* Update buffer lists of selected frame. */ | |
f00af5b1 PE |
2038 | fset_buffer_list (f, Fdelq (buffer, f->buffer_list)); |
2039 | fset_buried_buffer_list | |
2040 | (f, Fcons (buffer, Fdelq (buffer, f->buried_buffer_list))); | |
9397e56f MR |
2041 | |
2042 | /* Run buffer-list-update-hook. */ | |
2043 | if (!NILP (Vrun_hooks)) | |
2044 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
2045 | ||
e4ed06f1 | 2046 | return Qnil; |
1ab256cb RM |
2047 | } |
2048 | ||
a9ee7a59 | 2049 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 2050 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 2051 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
c1f02afa | 2052 | according to the default value of `major-mode'. |
018ba359 | 2053 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 2054 | the current buffer's major mode. */) |
5842a27b | 2055 | (Lisp_Object buffer) |
a9ee7a59 | 2056 | { |
d311d28c | 2057 | ptrdiff_t count; |
a9ee7a59 KH |
2058 | Lisp_Object function; |
2059 | ||
ea4fddd8 JB |
2060 | CHECK_BUFFER (buffer); |
2061 | ||
e578f381 | 2062 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
4f2daf31 DA |
2063 | error ("Attempt to set major mode for a dead buffer"); |
2064 | ||
2065 | if (strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
2066 | function = find_symbol_value (intern ("initial-major-mode")); |
2067 | else | |
2068 | { | |
4b4deea2 | 2069 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 2070 | if (NILP (function) |
4b4deea2 TT |
2071 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
2072 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 2073 | } |
177c0ea7 | 2074 | |
48265e61 DL |
2075 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
2076 | return Qnil; | |
2077 | ||
aed13378 | 2078 | count = SPECPDL_INDEX (); |
a9ee7a59 | 2079 | |
48265e61 | 2080 | /* To select a nonfundamental mode, |
dee4ba59 | 2081 | select the buffer temporarily and then call the mode function. */ |
a9ee7a59 KH |
2082 | |
2083 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
2084 | ||
a2428fa2 | 2085 | Fset_buffer (buffer); |
48265e61 | 2086 | call0 (function); |
a9ee7a59 KH |
2087 | |
2088 | return unbind_to (count, Qnil); | |
2089 | } | |
2090 | ||
a7ca3326 | 2091 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 2092 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 2093 | (void) |
1ab256cb RM |
2094 | { |
2095 | register Lisp_Object buf; | |
67180c6a | 2096 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
2097 | return buf; |
2098 | } | |
c7aa5005 KH |
2099 | |
2100 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
2101 | This is used by redisplay. */ | |
2102 | ||
2103 | void | |
d3da34e0 | 2104 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
2105 | { |
2106 | register struct buffer *old_buf; | |
ce5b453a | 2107 | register Lisp_Object tail; |
c7aa5005 | 2108 | |
b86af064 | 2109 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 2110 | if (b->text->beg == NULL) |
b86af064 GM |
2111 | enlarge_buffer_text (b, 0); |
2112 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 2113 | |
c7aa5005 KH |
2114 | if (current_buffer == b) |
2115 | return; | |
2116 | ||
f0863a54 | 2117 | BUFFER_CHECK_INDIRECTION (b); |
68f8f1c0 | 2118 | |
1ab256cb RM |
2119 | old_buf = current_buffer; |
2120 | current_buffer = b; | |
dee4ba59 | 2121 | last_known_column_point = -1; /* Invalidate indentation cache. */ |
1ab256cb | 2122 | |
336cd056 RS |
2123 | if (old_buf) |
2124 | { | |
2125 | /* Put the undo list back in the base buffer, so that it appears | |
2126 | that an indirect buffer shares the undo list of its base. */ | |
2127 | if (old_buf->base_buffer) | |
39eb03f1 | 2128 | bset_undo_list (old_buf->base_buffer, BVAR (old_buf, undo_list)); |
336cd056 RS |
2129 | |
2130 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
2131 | when it is not current, update them now. */ | |
cffc6f3b | 2132 | record_buffer_markers (old_buf); |
336cd056 RS |
2133 | } |
2134 | ||
2135 | /* Get the undo list from the base buffer, so that it appears | |
2136 | that an indirect buffer shares the undo list of its base. */ | |
2137 | if (b->base_buffer) | |
39eb03f1 | 2138 | bset_undo_list (b, BVAR (b->base_buffer, undo_list)); |
336cd056 RS |
2139 | |
2140 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2141 | when it is not current, fetch them now. */ | |
cffc6f3b | 2142 | fetch_buffer_markers (b); |
336cd056 | 2143 | |
1ab256cb | 2144 | /* Look down buffer's list of local Lisp variables |
dee4ba59 | 2145 | to find and update any that forward into C variables. */ |
1ab256cb | 2146 | |
ce5b453a | 2147 | do |
1ab256cb | 2148 | { |
4b4deea2 | 2149 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
2150 | { |
2151 | Lisp_Object var = XCAR (XCAR (tail)); | |
2152 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
2153 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
2154 | && SYMBOL_BLV (sym)->fwd) | |
2155 | /* Just reference the variable | |
2156 | to cause it to become set for this buffer. */ | |
2157 | Fsymbol_value (var); | |
2158 | } | |
1ab256cb | 2159 | } |
1ab256cb | 2160 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 2161 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
2162 | } |
2163 | ||
336cd056 | 2164 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 2165 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
2166 | |
2167 | void | |
d3da34e0 | 2168 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
2169 | { |
2170 | register struct buffer *old_buf; | |
2171 | ||
2172 | if (current_buffer == b) | |
2173 | return; | |
2174 | ||
2175 | old_buf = current_buffer; | |
2176 | current_buffer = b; | |
2177 | ||
cffc6f3b CY |
2178 | /* If the old current buffer has markers to record PT, BEGV and ZV |
2179 | when it is not current, update them now. */ | |
2180 | record_buffer_markers (old_buf); | |
336cd056 RS |
2181 | |
2182 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2183 | when it is not current, fetch them now. */ | |
cffc6f3b | 2184 | fetch_buffer_markers (b); |
336cd056 RS |
2185 | } |
2186 | ||
a7ca3326 | 2187 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f | 2188 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
b6d8543c JB |
2189 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. |
2190 | See also `with-current-buffer' when you want to make a buffer current | |
c8804c4f MR |
2191 | temporarily. This function does not display the buffer, so its effect |
2192 | ends when the current command terminates. Use `switch-to-buffer' or | |
b6d8543c JB |
2193 | `pop-to-buffer' to switch buffers permanently. |
2194 | The return value is the buffer made current. */) | |
5842a27b | 2195 | (register Lisp_Object buffer_or_name) |
1ab256cb | 2196 | { |
c8804c4f MR |
2197 | register Lisp_Object buffer; |
2198 | buffer = Fget_buffer (buffer_or_name); | |
2199 | if (NILP (buffer)) | |
2200 | nsberror (buffer_or_name); | |
e578f381 | 2201 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
1ab256cb | 2202 | error ("Selecting deleted buffer"); |
c8804c4f MR |
2203 | set_buffer_internal (XBUFFER (buffer)); |
2204 | return buffer; | |
1ab256cb | 2205 | } |
d0628b06 | 2206 | |
27e498e6 PE |
2207 | void |
2208 | restore_buffer (Lisp_Object buffer_or_name) | |
2209 | { | |
2210 | Fset_buffer (buffer_or_name); | |
2211 | } | |
2212 | ||
66322887 | 2213 | /* Set the current buffer to BUFFER provided if it is alive. */ |
d0628b06 | 2214 | |
27e498e6 | 2215 | void |
d3da34e0 | 2216 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 2217 | { |
e578f381 | 2218 | if (BUFFER_LIVE_P (XBUFFER (buffer))) |
a3d794a1 | 2219 | set_buffer_internal (XBUFFER (buffer)); |
d0628b06 | 2220 | } |
1ab256cb | 2221 | \f |
a7ca3326 | 2222 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 2223 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 2224 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 2225 | (void) |
1ab256cb | 2226 | { |
4b4deea2 | 2227 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2228 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2229 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2230 | return Qnil; |
2231 | } | |
1ab256cb | 2232 | \f |
a7ca3326 | 2233 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2234 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2235 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2236 | so the buffer is truly empty after this. */) |
5842a27b | 2237 | (void) |
1ab256cb RM |
2238 | { |
2239 | Fwiden (); | |
c0d9a0c3 GM |
2240 | |
2241 | del_range (BEG, Z); | |
c280bc6a | 2242 | |
1ab256cb RM |
2243 | current_buffer->last_window_start = 1; |
2244 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2245 | if future size is less than past size. Use of erase-buffer | |
2246 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2247 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2248 | return Qnil; |
2249 | } | |
2250 | ||
01136e9b | 2251 | void |
d3da34e0 | 2252 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2253 | { |
b7826503 PJ |
2254 | CHECK_NUMBER_COERCE_MARKER (*b); |
2255 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2256 | |
2257 | if (XINT (*b) > XINT (*e)) | |
2258 | { | |
03192067 KH |
2259 | Lisp_Object tem; |
2260 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2261 | } |
2262 | ||
d311d28c | 2263 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
28c16c40 | 2264 | args_out_of_range_3 (Fcurrent_buffer (), *b, *e); |
1ab256cb RM |
2265 | } |
2266 | \f | |
b05525fa RS |
2267 | /* Advance BYTE_POS up to a character boundary |
2268 | and return the adjusted position. */ | |
2269 | ||
d311d28c PE |
2270 | static ptrdiff_t |
2271 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2272 | { |
f8449323 | 2273 | int c; |
b05525fa | 2274 | |
f8449323 RS |
2275 | if (byte_pos == BEG) |
2276 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2277 | return BEG; |
f8449323 RS |
2278 | |
2279 | c = FETCH_BYTE (byte_pos); | |
2280 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2281 | { |
1be6387d | 2282 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2283 | multibyte sequence. */ |
d311d28c | 2284 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2285 | |
2286 | do | |
2287 | { | |
2288 | byte_pos--; | |
2289 | c = FETCH_BYTE (byte_pos); | |
2290 | } | |
2291 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2292 | INC_POS (byte_pos); |
a9bcded1 KH |
2293 | if (byte_pos < orig_byte_pos) |
2294 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2295 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2296 | surely advance to the correct character boundary. If C is | |
2297 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2298 | } |
2299 | ||
20773569 | 2300 | return byte_pos; |
b05525fa RS |
2301 | } |
2302 | ||
13cda5f9 SM |
2303 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2304 | 1, 1, 0, | |
2305 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2306 | (Lisp_Object buffer) |
13cda5f9 SM |
2307 | { |
2308 | struct buffer *other_buffer; | |
2309 | CHECK_BUFFER (buffer); | |
2310 | other_buffer = XBUFFER (buffer); | |
2311 | ||
e578f381 | 2312 | if (!BUFFER_LIVE_P (other_buffer)) |
409f2919 | 2313 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2314 | |
13cda5f9 SM |
2315 | /* Actually, it probably works just fine. |
2316 | * if (other_buffer == current_buffer) | |
2317 | * error ("Cannot swap a buffer's text with itself"); */ | |
2318 | ||
2319 | /* Actually, this may be workable as well, tho probably only if they're | |
2320 | *both* indirect. */ | |
2321 | if (other_buffer->base_buffer | |
2322 | || current_buffer->base_buffer) | |
2323 | error ("Cannot swap indirect buffers's text"); | |
2324 | ||
2325 | { /* This is probably harder to make work. */ | |
2326 | struct buffer *other; | |
52b852c7 | 2327 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2328 | if (other->base_buffer == other_buffer |
2329 | || other->base_buffer == current_buffer) | |
2330 | error ("One of the buffers to swap has indirect buffers"); | |
2331 | } | |
2332 | ||
2333 | #define swapfield(field, type) \ | |
2334 | do { \ | |
2335 | type tmp##field = other_buffer->field; \ | |
2336 | other_buffer->field = current_buffer->field; \ | |
2337 | current_buffer->field = tmp##field; \ | |
2338 | } while (0) | |
5d8ea120 TT |
2339 | #define swapfield_(field, type) \ |
2340 | do { \ | |
4b4deea2 | 2341 | type tmp##field = BVAR (other_buffer, field); \ |
39eb03f1 PE |
2342 | bset_##field (other_buffer, BVAR (current_buffer, field)); \ |
2343 | bset_##field (current_buffer, tmp##field); \ | |
5d8ea120 | 2344 | } while (0) |
13cda5f9 SM |
2345 | |
2346 | swapfield (own_text, struct buffer_text); | |
2347 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2348 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2349 | #ifdef REL_ALLOC |
261cb4bb PE |
2350 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2351 | (void **) &other_buffer->own_text.beg); | |
2352 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2353 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2354 | #endif /* REL_ALLOC */ |
2355 | ||
d311d28c PE |
2356 | swapfield (pt, ptrdiff_t); |
2357 | swapfield (pt_byte, ptrdiff_t); | |
2358 | swapfield (begv, ptrdiff_t); | |
2359 | swapfield (begv_byte, ptrdiff_t); | |
2360 | swapfield (zv, ptrdiff_t); | |
2361 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2362 | eassert (!current_buffer->base_buffer); |
2363 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2364 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2365 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2366 | swapfield (newline_cache, struct region_cache *); | |
2367 | swapfield (width_run_cache, struct region_cache *); | |
e30b79c1 | 2368 | swapfield (bidi_paragraph_cache, struct region_cache *); |
13cda5f9 SM |
2369 | current_buffer->prevent_redisplay_optimizations_p = 1; |
2370 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2371 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2372 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2373 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2374 | swapfield_ (undo_list, Lisp_Object); |
2375 | swapfield_ (mark, Lisp_Object); | |
2376 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2377 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2378 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2379 | /* FIXME: Not sure what we should do with these *_marker fields. |
2380 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2381 | swapfield_ (pt_marker, Lisp_Object); |
2382 | swapfield_ (begv_marker, Lisp_Object); | |
2383 | swapfield_ (zv_marker, Lisp_Object); | |
39eb03f1 PE |
2384 | bset_point_before_scroll (current_buffer, Qnil); |
2385 | bset_point_before_scroll (other_buffer, Qnil); | |
13cda5f9 SM |
2386 | |
2387 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2388 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2389 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2390 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2391 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2392 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2393 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2394 | { |
2395 | struct Lisp_Marker *m; | |
2396 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2397 | if (m->buffer == other_buffer) | |
2398 | m->buffer = current_buffer; | |
b8ff72fa SM |
2399 | else |
2400 | /* Since there's no indirect buffer in sight, markers on | |
2401 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2402 | eassert (!m->buffer); | |
13cda5f9 SM |
2403 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2404 | if (m->buffer == current_buffer) | |
2405 | m->buffer = other_buffer; | |
b8ff72fa SM |
2406 | else |
2407 | /* Since there's no indirect buffer in sight, markers on | |
2408 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2409 | eassert (!m->buffer); | |
13cda5f9 | 2410 | } |
c7f53895 DA |
2411 | { /* Some of the C code expects that both window markers of a |
2412 | live window points to that window's buffer. So since we | |
2413 | just swapped the markers between the two buffers, we need | |
126f1fc1 | 2414 | to undo the effect of this swap for window markers. */ |
d2a95ffb | 2415 | Lisp_Object w = selected_window, ws = Qnil; |
126f1fc1 SM |
2416 | Lisp_Object buf1, buf2; |
2417 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2418 | ||
2419 | while (NILP (Fmemq (w, ws))) | |
2420 | { | |
2421 | ws = Fcons (w, ws); | |
d3d50620 | 2422 | if (MARKERP (XWINDOW (w)->pointm) |
e74aeda8 DA |
2423 | && (EQ (XWINDOW (w)->contents, buf1) |
2424 | || EQ (XWINDOW (w)->contents, buf2))) | |
d3d50620 | 2425 | Fset_marker (XWINDOW (w)->pointm, |
3a45383a | 2426 | make_number |
e74aeda8 DA |
2427 | (BUF_BEGV (XBUFFER (XWINDOW (w)->contents))), |
2428 | XWINDOW (w)->contents); | |
c7f53895 | 2429 | if (MARKERP (XWINDOW (w)->start) |
e74aeda8 DA |
2430 | && (EQ (XWINDOW (w)->contents, buf1) |
2431 | || EQ (XWINDOW (w)->contents, buf2))) | |
c7f53895 DA |
2432 | Fset_marker (XWINDOW (w)->start, |
2433 | make_number | |
e74aeda8 DA |
2434 | (XBUFFER (XWINDOW (w)->contents)->last_window_start), |
2435 | XWINDOW (w)->contents); | |
126f1fc1 SM |
2436 | w = Fnext_window (w, Qt, Qt); |
2437 | } | |
2438 | } | |
2439 | ||
13cda5f9 SM |
2440 | if (current_buffer->text->intervals) |
2441 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2442 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2443 | if (other_buffer->text->intervals) | |
2444 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2445 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2446 | ||
2447 | return Qnil; | |
2448 | } | |
2449 | ||
a7ca3326 | 2450 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2451 | 1, 1, 0, |
7ee72033 | 2452 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2453 | If FLAG is t, this makes the buffer a multibyte buffer. |
2454 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2455 | In these cases, the buffer contents remain unchanged as a sequence of |
2456 | bytes but the contents viewed as characters do change. | |
2457 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2458 | all eight-bit bytes to eight-bit characters. |
2459 | If the multibyte flag was really changed, undo information of the | |
2460 | current buffer is cleared. */) | |
5842a27b | 2461 | (Lisp_Object flag) |
3ac81adb | 2462 | { |
65745fad | 2463 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2464 | struct buffer *other; |
d311d28c | 2465 | ptrdiff_t begv, zv; |
37ef52bb PE |
2466 | bool narrowed = (BEG != BEGV || Z != ZV); |
2467 | bool modified_p = !NILP (Fbuffer_modified_p (Qnil)); | |
4b4deea2 | 2468 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2469 | struct gcpro gcpro1; |
3ac81adb | 2470 | |
6e553d5e RS |
2471 | if (current_buffer->base_buffer) |
2472 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2473 | ||
70e77119 | 2474 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2475 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2476 | return flag; |
2477 | ||
38babc07 KS |
2478 | GCPRO1 (old_undo); |
2479 | ||
2480 | /* Don't record these buffer changes. We will put a special undo entry | |
2481 | instead. */ | |
39eb03f1 | 2482 | bset_undo_list (current_buffer, Qt); |
b05525fa | 2483 | |
3ac81adb RS |
2484 | /* If the cached position is for this buffer, clear it out. */ |
2485 | clear_charpos_cache (current_buffer); | |
2486 | ||
458c8af4 KH |
2487 | if (NILP (flag)) |
2488 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2489 | else | |
2490 | begv = BEGV, zv = ZV; | |
2491 | ||
a9bcded1 | 2492 | if (narrowed) |
090cf9db | 2493 | error ("Changing multibyteness in a narrowed buffer"); |
a9bcded1 | 2494 | |
6d6aa291 EZ |
2495 | invalidate_buffer_caches (current_buffer, BEGV, ZV); |
2496 | ||
3ac81adb RS |
2497 | if (NILP (flag)) |
2498 | { | |
d311d28c | 2499 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2500 | unsigned char *p; |
2501 | ||
3ac81adb RS |
2502 | /* Do this first, so it can use CHAR_TO_BYTE |
2503 | to calculate the old correspondences. */ | |
2504 | set_intervals_multibyte (0); | |
2505 | ||
39eb03f1 | 2506 | bset_enable_multibyte_characters (current_buffer, Qnil); |
3ac81adb RS |
2507 | |
2508 | Z = Z_BYTE; | |
2509 | BEGV = BEGV_BYTE; | |
2510 | ZV = ZV_BYTE; | |
2511 | GPT = GPT_BYTE; | |
2512 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2513 | ||
60ebfdf3 | 2514 | |
65745fad SM |
2515 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2516 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2517 | |
2518 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2519 | pos = BEG; | |
2520 | stop = GPT; | |
2521 | p = BEG_ADDR; | |
2522 | while (1) | |
2523 | { | |
2524 | int c, bytes; | |
2525 | ||
2526 | if (pos == stop) | |
2527 | { | |
2528 | if (pos == Z) | |
2529 | break; | |
2530 | p = GAP_END_ADDR; | |
2531 | stop = Z; | |
2532 | } | |
200fc949 | 2533 | if (ASCII_CHAR_P (*p)) |
8f348ed5 KH |
2534 | p++, pos++; |
2535 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2536 | { |
62a6e103 | 2537 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2538 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2539 | last one, and change the last one to the character |
a9bcded1 KH |
2540 | code. */ |
2541 | bytes--; | |
2542 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2543 | p = GAP_END_ADDR; | |
2544 | *p++ = c; | |
2545 | pos++; | |
2546 | if (begv > pos) | |
2547 | begv -= bytes; | |
2548 | if (zv > pos) | |
2549 | zv -= bytes; | |
2550 | stop = Z; | |
2551 | } | |
8f924df7 | 2552 | else |
8f348ed5 KH |
2553 | { |
2554 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2555 | p += bytes, pos += bytes; | |
2556 | } | |
a9bcded1 KH |
2557 | } |
2558 | if (narrowed) | |
2559 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2560 | } |
2561 | else | |
2562 | { | |
d311d28c PE |
2563 | ptrdiff_t pt = PT; |
2564 | ptrdiff_t pos, stop; | |
8f348ed5 | 2565 | unsigned char *p, *pend; |
a9bcded1 | 2566 | |
673c57d2 | 2567 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2568 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2569 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2570 | |
8f924df7 | 2571 | if (EQ (flag, Qt) |
a3a303df | 2572 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2573 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2574 | { | |
8f54f30a | 2575 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2576 | |
8f54f30a PE |
2577 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2578 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2579 | { |
d311d28c | 2580 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2581 | |
2582 | move_gap_both (new_gpt, new_gpt); | |
2583 | } | |
2584 | } | |
2585 | ||
a9bcded1 KH |
2586 | /* Make the buffer contents valid as multibyte by converting |
2587 | 8-bit characters to multibyte form. */ | |
2588 | pos = BEG; | |
2589 | stop = GPT; | |
2590 | p = BEG_ADDR; | |
8f348ed5 | 2591 | pend = GPT_ADDR; |
a9bcded1 KH |
2592 | while (1) |
2593 | { | |
2594 | int bytes; | |
2595 | ||
2596 | if (pos == stop) | |
2597 | { | |
2598 | if (pos == Z) | |
2599 | break; | |
2600 | p = GAP_END_ADDR; | |
8f348ed5 | 2601 | pend = Z_ADDR; |
a9bcded1 KH |
2602 | stop = Z; |
2603 | } | |
177c0ea7 | 2604 | |
200fc949 | 2605 | if (ASCII_CHAR_P (*p)) |
a3a303df | 2606 | p++, pos++; |
dcfb9bc4 KH |
2607 | else if (EQ (flag, Qt) |
2608 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2609 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2610 | p += bytes, pos += bytes; |
2611 | else | |
2612 | { | |
2613 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2614 | int c; |
a9bcded1 | 2615 | |
8f924df7 | 2616 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2617 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2618 | *p = tmp[0]; |
2619 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2620 | bytes--; | |
b68864e5 | 2621 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2622 | /* Now the gap is after the just inserted data. */ |
2623 | pos = GPT; | |
2624 | p = GAP_END_ADDR; | |
2625 | if (pos <= begv) | |
2626 | begv += bytes; | |
2627 | if (pos <= zv) | |
2628 | zv += bytes; | |
2629 | if (pos <= pt) | |
2630 | pt += bytes; | |
31285a8f | 2631 | pend = Z_ADDR; |
a9bcded1 KH |
2632 | stop = Z; |
2633 | } | |
2634 | } | |
2635 | ||
2636 | if (pt != PT) | |
2637 | TEMP_SET_PT (pt); | |
2638 | ||
2639 | if (narrowed) | |
2640 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2641 | ||
3ac81adb RS |
2642 | /* Do this first, so that chars_in_text asks the right question. |
2643 | set_intervals_multibyte needs it too. */ | |
39eb03f1 | 2644 | bset_enable_multibyte_characters (current_buffer, Qt); |
3ac81adb | 2645 | |
b05525fa | 2646 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2647 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2648 | |
673c57d2 | 2649 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2650 | |
2651 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2652 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2653 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2654 | else |
2655 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2656 | |
2657 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2658 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2659 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2660 | else |
2661 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2662 | |
2663 | { | |
d311d28c PE |
2664 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2665 | ptrdiff_t position; | |
b05525fa | 2666 | |
8f54f30a PE |
2667 | if (byte > GPT_BYTE) |
2668 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2669 | else |
8f54f30a PE |
2670 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2671 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2672 | } |
3ac81adb RS |
2673 | |
2674 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2675 | |
2676 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2677 | getting confused by the markers that have not yet been updated. | |
2678 | It is also a signal that it should never create a marker. */ | |
65745fad | 2679 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2680 | |
65745fad | 2681 | for (; tail; tail = tail->next) |
3ac81adb | 2682 | { |
65745fad SM |
2683 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2684 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2685 | } |
b69f9797 RS |
2686 | |
2687 | /* Make sure no markers were put on the chain | |
2688 | while the chain value was incorrect. */ | |
65745fad | 2689 | if (BUF_MARKERS (current_buffer)) |
1088b922 | 2690 | emacs_abort (); |
b69f9797 | 2691 | |
3ac81adb RS |
2692 | BUF_MARKERS (current_buffer) = markers; |
2693 | ||
2694 | /* Do this last, so it can calculate the new correspondences | |
2695 | between chars and bytes. */ | |
2696 | set_intervals_multibyte (1); | |
2697 | } | |
2698 | ||
38babc07 KS |
2699 | if (!EQ (old_undo, Qt)) |
2700 | { | |
2701 | /* Represent all the above changes by a special undo entry. */ | |
39eb03f1 PE |
2702 | bset_undo_list (current_buffer, |
2703 | Fcons (list3 (Qapply, | |
2704 | intern ("set-buffer-multibyte"), | |
2705 | NILP (flag) ? Qt : Qnil), | |
2706 | old_undo)); | |
38babc07 KS |
2707 | } |
2708 | ||
2709 | UNGCPRO; | |
a9bcded1 | 2710 | |
724b203f | 2711 | current_buffer->prevent_redisplay_optimizations_p = 1; |
c6afe371 DA |
2712 | |
2713 | /* If buffer is shown in a window, let redisplay consider other windows. */ | |
2714 | if (buffer_window_count (current_buffer)) | |
94ae2ad4 | 2715 | windows_or_buffers_changed = 10; |
724b203f | 2716 | |
abc9d959 RS |
2717 | /* Copy this buffer's new multibyte status |
2718 | into all of its indirect buffers. */ | |
52b852c7 | 2719 | FOR_EACH_BUFFER (other) |
e578f381 | 2720 | if (other->base_buffer == current_buffer && BUFFER_LIVE_P (other)) |
724b203f | 2721 | { |
4b4deea2 TT |
2722 | BVAR (other, enable_multibyte_characters) |
2723 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2724 | other->prevent_redisplay_optimizations_p = 1; |
2725 | } | |
abc9d959 | 2726 | |
ed00559d KH |
2727 | /* Restore the modifiedness of the buffer. */ |
2728 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2729 | Fset_buffer_modified_p (Qnil); | |
2730 | ||
172f9454 KH |
2731 | /* Update coding systems of this buffer's process (if any). */ |
2732 | { | |
2733 | Lisp_Object process; | |
2734 | ||
2735 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2736 | if (PROCESSP (process)) | |
2737 | setup_process_coding_systems (process); | |
2738 | } | |
2739 | ||
3ac81adb RS |
2740 | return flag; |
2741 | } | |
2742 | \f | |
a7ca3326 | 2743 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2744 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2745 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2746 | Most local variable bindings are eliminated so that the default values |
2747 | become effective once more. Also, the syntax table is set from | |
2748 | `standard-syntax-table', the local keymap is set to nil, | |
2749 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2750 | This function also forces redisplay of the mode line. | |
2751 | ||
2752 | Every function to select a new major mode starts by | |
2753 | calling this function. | |
2754 | ||
2755 | As a special exception, local variables whose names have | |
2756 | a non-nil `permanent-local' property are not eliminated by this function. | |
2757 | ||
2758 | The first thing this function does is run | |
7ee72033 | 2759 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2760 | (void) |
1ab256cb | 2761 | { |
dee091a3 | 2762 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2763 | |
3709505e | 2764 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2765 | remain swapped in, in their symbols. */ |
1ab256cb | 2766 | |
2f3f993b | 2767 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2768 | |
2769 | /* Actually eliminate all local bindings of this buffer. */ | |
2770 | ||
13de9290 | 2771 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2772 | |
1ab256cb RM |
2773 | /* Force mode-line redisplay. Useful here because all major mode |
2774 | commands call this function. */ | |
2ec9db5d | 2775 | update_mode_lines = 12; |
1ab256cb RM |
2776 | |
2777 | return Qnil; | |
2778 | } | |
2f3f993b RS |
2779 | |
2780 | /* Make sure no local variables remain set up with buffer B | |
2781 | for their current values. */ | |
2782 | ||
2783 | static void | |
d3da34e0 | 2784 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2785 | { |
ce5b453a | 2786 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2787 | |
2788 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2789 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2790 | |
67ee9f6e | 2791 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2792 | { |
ce5b453a SM |
2793 | Lisp_Object sym = XCAR (XCAR (alist)); |
2794 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2795 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2796 | now cached. */ |
ce5b453a | 2797 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2798 | { |
e7c10f83 SM |
2799 | /* Symbol is set up for this buffer's old local value: |
2800 | swap it out! */ | |
ce5b453a | 2801 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2802 | } |
2803 | } | |
2804 | } | |
1ab256cb | 2805 | \f |
2eec3b4e | 2806 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2807 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2808 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2809 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2810 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2811 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2812 | or where an overlay starts which ends at or after POS; |
624d2678 | 2813 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2814 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2815 | |
2816 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2817 | when this function is called. |
2818 | ||
37ef52bb PE |
2819 | If EXTEND, make the vector bigger if necessary. |
2820 | If not, never extend the vector, | |
2821 | and store only as many overlays as will fit. | |
2822 | But still return the total number of overlays. | |
ac869cf7 | 2823 | |
37ef52bb | 2824 | If CHANGE_REQ, any position written into *PREV_PTR or |
ac869cf7 MB |
2825 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the |
2826 | default (BEGV or ZV). */ | |
2eec3b4e | 2827 | |
b081724f | 2828 | ptrdiff_t |
37ef52bb | 2829 | overlays_at (EMACS_INT pos, bool extend, Lisp_Object **vec_ptr, |
b081724f | 2830 | ptrdiff_t *len_ptr, |
37ef52bb | 2831 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, bool change_req) |
1ab256cb | 2832 | { |
2410d73a SM |
2833 | Lisp_Object overlay, start, end; |
2834 | struct Lisp_Overlay *tail; | |
b081724f PE |
2835 | ptrdiff_t idx = 0; |
2836 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2837 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2838 | ptrdiff_t next = ZV; |
2839 | ptrdiff_t prev = BEGV; | |
37ef52bb | 2840 | bool inhibit_storing = 0; |
61d54cd5 | 2841 | |
fd318b54 | 2842 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2843 | { |
d311d28c | 2844 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2845 | |
2410d73a | 2846 | XSETMISC (overlay, tail); |
1ab256cb | 2847 | |
2eec3b4e RS |
2848 | start = OVERLAY_START (overlay); |
2849 | end = OVERLAY_END (overlay); | |
239c932b RS |
2850 | endpos = OVERLAY_POSITION (end); |
2851 | if (endpos < pos) | |
2852 | { | |
2853 | if (prev < endpos) | |
2854 | prev = endpos; | |
2855 | break; | |
2856 | } | |
413e06a4 RS |
2857 | startpos = OVERLAY_POSITION (start); |
2858 | /* This one ends at or after POS | |
daa1c109 | 2859 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2860 | if (prev < startpos && startpos < pos) |
2861 | prev = startpos; | |
239c932b RS |
2862 | if (endpos == pos) |
2863 | continue; | |
2eec3b4e RS |
2864 | if (startpos <= pos) |
2865 | { | |
2866 | if (idx == len) | |
2867 | { | |
61d54cd5 RS |
2868 | /* The supplied vector is full. |
2869 | Either make it bigger, or don't store any more in it. */ | |
2870 | if (extend) | |
2871 | { | |
0065d054 PE |
2872 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2873 | sizeof *vec); | |
61d54cd5 | 2874 | *vec_ptr = vec; |
0065d054 | 2875 | len = *len_ptr; |
61d54cd5 RS |
2876 | } |
2877 | else | |
2878 | inhibit_storing = 1; | |
2eec3b4e | 2879 | } |
61d54cd5 RS |
2880 | |
2881 | if (!inhibit_storing) | |
2882 | vec[idx] = overlay; | |
2883 | /* Keep counting overlays even if we can't return them all. */ | |
2884 | idx++; | |
2eec3b4e RS |
2885 | } |
2886 | else if (startpos < next) | |
2887 | next = startpos; | |
2888 | } | |
2889 | ||
fd318b54 | 2890 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2891 | { |
d311d28c | 2892 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2893 | |
2410d73a | 2894 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2895 | |
2896 | start = OVERLAY_START (overlay); | |
2897 | end = OVERLAY_END (overlay); | |
2898 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2899 | if (pos < startpos) |
2eec3b4e RS |
2900 | { |
2901 | if (startpos < next) | |
2902 | next = startpos; | |
2903 | break; | |
2904 | } | |
239c932b RS |
2905 | endpos = OVERLAY_POSITION (end); |
2906 | if (pos < endpos) | |
2eec3b4e RS |
2907 | { |
2908 | if (idx == len) | |
2909 | { | |
61d54cd5 RS |
2910 | if (extend) |
2911 | { | |
0065d054 PE |
2912 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2913 | sizeof *vec); | |
61d54cd5 | 2914 | *vec_ptr = vec; |
0065d054 | 2915 | len = *len_ptr; |
61d54cd5 RS |
2916 | } |
2917 | else | |
2918 | inhibit_storing = 1; | |
2eec3b4e | 2919 | } |
61d54cd5 RS |
2920 | |
2921 | if (!inhibit_storing) | |
2922 | vec[idx] = overlay; | |
2923 | idx++; | |
413e06a4 RS |
2924 | |
2925 | if (startpos < pos && startpos > prev) | |
2926 | prev = startpos; | |
2eec3b4e | 2927 | } |
239c932b RS |
2928 | else if (endpos < pos && endpos > prev) |
2929 | prev = endpos; | |
1d5f4c1d MB |
2930 | else if (endpos == pos && startpos > prev |
2931 | && (!change_req || startpos < pos)) | |
413e06a4 | 2932 | prev = startpos; |
1ab256cb RM |
2933 | } |
2934 | ||
239c932b RS |
2935 | if (next_ptr) |
2936 | *next_ptr = next; | |
2937 | if (prev_ptr) | |
2938 | *prev_ptr = prev; | |
2eec3b4e RS |
2939 | return idx; |
2940 | } | |
74514898 | 2941 | \f |
7723e095 MR |
2942 | /* Find all the overlays in the current buffer that overlap the range |
2943 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2944 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2945 | |
177c0ea7 | 2946 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2947 | Store in *LEN_PTR the size allocated for the vector. |
2948 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2949 | or ZV if there are no more overlays. | |
2950 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2951 | or BEGV if there are no previous overlays. | |
2952 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2953 | ||
2954 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2955 | when this function is called. | |
2956 | ||
37ef52bb PE |
2957 | If EXTEND, make the vector bigger if necessary. |
2958 | If not, never extend the vector, | |
2959 | and store only as many overlays as will fit. | |
2960 | But still return the total number of overlays. */ | |
74514898 | 2961 | |
21514da7 | 2962 | static ptrdiff_t |
37ef52bb | 2963 | overlays_in (EMACS_INT beg, EMACS_INT end, bool extend, |
21514da7 | 2964 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2965 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2966 | { |
2410d73a SM |
2967 | Lisp_Object overlay, ostart, oend; |
2968 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2969 | ptrdiff_t idx = 0; |
2970 | ptrdiff_t len = *len_ptr; | |
74514898 | 2971 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2972 | ptrdiff_t next = ZV; |
2973 | ptrdiff_t prev = BEGV; | |
37ef52bb PE |
2974 | bool inhibit_storing = 0; |
2975 | bool end_is_Z = end == Z; | |
74514898 | 2976 | |
fd318b54 | 2977 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2978 | { |
d311d28c | 2979 | ptrdiff_t startpos, endpos; |
74514898 | 2980 | |
2410d73a | 2981 | XSETMISC (overlay, tail); |
74514898 RS |
2982 | |
2983 | ostart = OVERLAY_START (overlay); | |
2984 | oend = OVERLAY_END (overlay); | |
2985 | endpos = OVERLAY_POSITION (oend); | |
2986 | if (endpos < beg) | |
2987 | { | |
2988 | if (prev < endpos) | |
2989 | prev = endpos; | |
2990 | break; | |
2991 | } | |
2992 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2993 | /* Count an interval if it overlaps the range, is empty at the |
2994 | start of the range, or is empty at END provided END denotes the | |
2995 | end of the buffer. */ | |
74514898 | 2996 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2997 | || (startpos == endpos |
2998 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2999 | { |
3000 | if (idx == len) | |
3001 | { | |
3002 | /* The supplied vector is full. | |
3003 | Either make it bigger, or don't store any more in it. */ | |
3004 | if (extend) | |
3005 | { | |
0065d054 PE |
3006 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
3007 | sizeof *vec); | |
74514898 | 3008 | *vec_ptr = vec; |
0065d054 | 3009 | len = *len_ptr; |
74514898 RS |
3010 | } |
3011 | else | |
3012 | inhibit_storing = 1; | |
3013 | } | |
3014 | ||
3015 | if (!inhibit_storing) | |
3016 | vec[idx] = overlay; | |
3017 | /* Keep counting overlays even if we can't return them all. */ | |
3018 | idx++; | |
3019 | } | |
3020 | else if (startpos < next) | |
3021 | next = startpos; | |
3022 | } | |
3023 | ||
fd318b54 | 3024 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 3025 | { |
d311d28c | 3026 | ptrdiff_t startpos, endpos; |
74514898 | 3027 | |
2410d73a | 3028 | XSETMISC (overlay, tail); |
74514898 RS |
3029 | |
3030 | ostart = OVERLAY_START (overlay); | |
3031 | oend = OVERLAY_END (overlay); | |
3032 | startpos = OVERLAY_POSITION (ostart); | |
3033 | if (end < startpos) | |
3034 | { | |
3035 | if (startpos < next) | |
3036 | next = startpos; | |
3037 | break; | |
3038 | } | |
3039 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
3040 | /* Count an interval if it overlaps the range, is empty at the |
3041 | start of the range, or is empty at END provided END denotes the | |
3042 | end of the buffer. */ | |
74514898 | 3043 | if ((beg < endpos && startpos < end) |
7723e095 MR |
3044 | || (startpos == endpos |
3045 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
3046 | { |
3047 | if (idx == len) | |
3048 | { | |
3049 | if (extend) | |
3050 | { | |
0065d054 PE |
3051 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
3052 | sizeof *vec); | |
74514898 | 3053 | *vec_ptr = vec; |
0065d054 | 3054 | len = *len_ptr; |
74514898 RS |
3055 | } |
3056 | else | |
3057 | inhibit_storing = 1; | |
3058 | } | |
3059 | ||
3060 | if (!inhibit_storing) | |
3061 | vec[idx] = overlay; | |
3062 | idx++; | |
3063 | } | |
3064 | else if (endpos < beg && endpos > prev) | |
3065 | prev = endpos; | |
3066 | } | |
fc04fa47 | 3067 | |
74514898 RS |
3068 | if (next_ptr) |
3069 | *next_ptr = next; | |
3070 | if (prev_ptr) | |
3071 | *prev_ptr = prev; | |
3072 | return idx; | |
3073 | } | |
09a22085 GM |
3074 | |
3075 | ||
37ef52bb | 3076 | /* Return true if there exists an overlay with a non-nil |
09a22085 GM |
3077 | `mouse-face' property overlapping OVERLAY. */ |
3078 | ||
37ef52bb | 3079 | bool |
d3da34e0 | 3080 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 3081 | { |
d311d28c PE |
3082 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3083 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 3084 | ptrdiff_t n, i, size; |
09a22085 | 3085 | Lisp_Object *v, tem; |
177c0ea7 | 3086 | |
bfd8410f | 3087 | size = 10; |
38182d90 | 3088 | v = alloca (size * sizeof *v); |
bfd8410f GM |
3089 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
3090 | if (n > size) | |
09a22085 | 3091 | { |
38182d90 | 3092 | v = alloca (n * sizeof *v); |
09a22085 GM |
3093 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
3094 | } | |
3095 | ||
3096 | for (i = 0; i < n; ++i) | |
3097 | if (!EQ (v[i], overlay) | |
3098 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
3099 | !NILP (tem))) | |
3100 | break; | |
3101 | ||
3102 | return i < n; | |
3103 | } | |
3104 | ||
3105 | ||
74514898 | 3106 | \f |
fc04fa47 | 3107 | /* Fast function to just test if we're at an overlay boundary. */ |
37ef52bb | 3108 | bool |
d311d28c | 3109 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 3110 | { |
2410d73a SM |
3111 | Lisp_Object overlay; |
3112 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3113 | |
fd318b54 | 3114 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 3115 | { |
d311d28c | 3116 | ptrdiff_t endpos; |
fc04fa47 | 3117 | |
2410d73a | 3118 | XSETMISC (overlay ,tail); |
22657b40 | 3119 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3120 | |
3121 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3122 | if (endpos < pos) | |
3123 | break; | |
3124 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3125 | return 1; | |
3126 | } | |
3127 | ||
fd318b54 | 3128 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 3129 | { |
d311d28c | 3130 | ptrdiff_t startpos; |
fc04fa47 | 3131 | |
2410d73a | 3132 | XSETMISC (overlay, tail); |
22657b40 | 3133 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3134 | |
3135 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3136 | if (pos < startpos) | |
3137 | break; | |
3138 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3139 | return 1; | |
3140 | } | |
3141 | return 0; | |
3142 | } | |
2eec3b4e | 3143 | \f |
5985d248 KH |
3144 | struct sortvec |
3145 | { | |
3146 | Lisp_Object overlay; | |
d311d28c | 3147 | ptrdiff_t beg, end; |
fadf4e30 | 3148 | EMACS_INT priority; |
f6614a47 | 3149 | EMACS_INT spriority; /* Secondary priority. */ |
5985d248 KH |
3150 | }; |
3151 | ||
3152 | static int | |
d3da34e0 | 3153 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 3154 | { |
7d652d97 PE |
3155 | const struct sortvec *s1 = v1; |
3156 | const struct sortvec *s2 = v2; | |
f6614a47 SM |
3157 | /* Return 1 if s1 should take precedence, -1 if v2 should take precedence, |
3158 | and 0 if they're equal. */ | |
5985d248 | 3159 | if (s1->priority != s2->priority) |
c20998a7 | 3160 | return s1->priority < s2->priority ? -1 : 1; |
f6614a47 SM |
3161 | /* If the priority is equal, give precedence to the one not covered by the |
3162 | other. If neither covers the other, obey spriority. */ | |
3163 | else if (s1->beg < s2->beg) | |
3164 | return (s1->end < s2->end && s1->spriority > s2->spriority ? 1 : -1); | |
3165 | else if (s1->beg > s2->beg) | |
3166 | return (s1->end > s2->end && s1->spriority < s2->spriority ? -1 : 1); | |
3167 | else if (s1->end != s2->end) | |
c20998a7 | 3168 | return s2->end < s1->end ? -1 : 1; |
f6614a47 SM |
3169 | else if (s1->spriority != s2->spriority) |
3170 | return (s1->spriority < s2->spriority ? -1 : 1); | |
3171 | else if (EQ (s1->overlay, s2->overlay)) | |
3172 | return 0; | |
3173 | else | |
3174 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering | |
3175 | between "equal" overlays. The result can still change between | |
3176 | invocations of Emacs, but it won't change in the middle of | |
3177 | `find_field' (bug#6830). */ | |
61ddb1b9 | 3178 | return XLI (s1->overlay) < XLI (s2->overlay) ? -1 : 1; |
5985d248 KH |
3179 | } |
3180 | ||
3181 | /* Sort an array of overlays by priority. The array is modified in place. | |
3182 | The return value is the new size; this may be smaller than the original | |
3183 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
3184 | ptrdiff_t |
3185 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 3186 | { |
b081724f | 3187 | ptrdiff_t i, j; |
59ac2d13 EZ |
3188 | USE_SAFE_ALLOCA; |
3189 | struct sortvec *sortvec; | |
3190 | ||
3191 | SAFE_NALLOCA (sortvec, 1, noverlays); | |
5985d248 KH |
3192 | |
3193 | /* Put the valid and relevant overlays into sortvec. */ | |
3194 | ||
3195 | for (i = 0, j = 0; i < noverlays; i++) | |
3196 | { | |
0fa767e7 | 3197 | Lisp_Object tem; |
c99fc30f | 3198 | Lisp_Object overlay; |
5985d248 | 3199 | |
c99fc30f | 3200 | overlay = overlay_vec[i]; |
22657b40 | 3201 | if (OVERLAYP (overlay) |
5985d248 KH |
3202 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
3203 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3204 | { | |
0fa767e7 KH |
3205 | /* If we're interested in a specific window, then ignore |
3206 | overlays that are limited to some other window. */ | |
3207 | if (w) | |
5985d248 | 3208 | { |
28545e04 | 3209 | Lisp_Object window; |
0fa767e7 KH |
3210 | |
3211 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3212 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3213 | continue; |
5985d248 | 3214 | } |
0fa767e7 KH |
3215 | |
3216 | /* This overlay is good and counts: put it into sortvec. */ | |
3217 | sortvec[j].overlay = overlay; | |
3218 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3219 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3220 | tem = Foverlay_get (overlay, Qpriority); | |
f6614a47 SM |
3221 | if (NILP (tem)) |
3222 | { | |
3223 | sortvec[j].priority = 0; | |
3224 | sortvec[j].spriority = 0; | |
3225 | } | |
3226 | else if (INTEGERP (tem)) | |
3227 | { | |
3228 | sortvec[j].priority = XINT (tem); | |
3229 | sortvec[j].spriority = 0; | |
3230 | } | |
3231 | else if (CONSP (tem)) | |
3232 | { | |
3233 | Lisp_Object car = XCAR (tem); | |
3234 | Lisp_Object cdr = XCDR (tem); | |
3235 | sortvec[j].priority = INTEGERP (car) ? XINT (car) : 0; | |
3236 | sortvec[j].spriority = INTEGERP (cdr) ? XINT (cdr) : 0; | |
3237 | } | |
0fa767e7 | 3238 | j++; |
5985d248 KH |
3239 | } |
3240 | } | |
3241 | noverlays = j; | |
3242 | ||
3243 | /* Sort the overlays into the proper order: increasing priority. */ | |
3244 | ||
3245 | if (noverlays > 1) | |
3246 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3247 | ||
3248 | for (i = 0; i < noverlays; i++) | |
3249 | overlay_vec[i] = sortvec[i].overlay; | |
59ac2d13 EZ |
3250 | |
3251 | SAFE_FREE (); | |
5985d248 KH |
3252 | return (noverlays); |
3253 | } | |
3254 | \f | |
bbbe9545 KH |
3255 | struct sortstr |
3256 | { | |
cb26008f | 3257 | Lisp_Object string, string2; |
93cb6be3 | 3258 | ptrdiff_t size; |
8961a454 | 3259 | EMACS_INT priority; |
bbbe9545 KH |
3260 | }; |
3261 | ||
e8185fa8 KH |
3262 | struct sortstrlist |
3263 | { | |
3264 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3265 | ptrdiff_t size; /* Allocated length of that array. */ |
3266 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3267 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3268 | }; |
3269 | ||
3270 | /* Buffers for storing information about the overlays touching a given | |
3271 | position. These could be automatic variables in overlay_strings, but | |
3272 | it's more efficient to hold onto the memory instead of repeatedly | |
3273 | allocating and freeing it. */ | |
3274 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3275 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3276 | |
3277 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3278 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3279 | |
bbbe9545 KH |
3280 | /* A comparison function suitable for passing to qsort. */ |
3281 | static int | |
d3da34e0 | 3282 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 | 3283 | { |
7d652d97 PE |
3284 | struct sortstr const *s1 = as1; |
3285 | struct sortstr const *s2 = as2; | |
bbbe9545 | 3286 | if (s1->size != s2->size) |
c20998a7 | 3287 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3288 | if (s1->priority != s2->priority) |
c20998a7 | 3289 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3290 | return 0; |
3291 | } | |
3292 | ||
e8185fa8 | 3293 | static void |
93cb6be3 PE |
3294 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3295 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3296 | { |
d311d28c | 3297 | ptrdiff_t nbytes; |
43d27a72 | 3298 | |
e8185fa8 | 3299 | if (ssl->used == ssl->size) |
0065d054 | 3300 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3301 | ssl->buf[ssl->used].string = str; |
cb26008f | 3302 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3303 | ssl->buf[ssl->used].size = size; |
3304 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3305 | ssl->used++; | |
43d27a72 | 3306 | |
4b4deea2 | 3307 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3308 | nbytes = SCHARS (str); |
43d27a72 | 3309 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3310 | nbytes = count_size_as_multibyte (SDATA (str), |
3311 | SBYTES (str)); | |
43d27a72 | 3312 | else |
d5db4077 | 3313 | nbytes = SBYTES (str); |
43d27a72 | 3314 | |
0065d054 PE |
3315 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3316 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3317 | ssl->bytes += nbytes; |
3318 | ||
cb26008f | 3319 | if (STRINGP (str2)) |
43d27a72 | 3320 | { |
4b4deea2 | 3321 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3322 | nbytes = SCHARS (str2); |
43d27a72 | 3323 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3324 | nbytes = count_size_as_multibyte (SDATA (str2), |
3325 | SBYTES (str2)); | |
43d27a72 | 3326 | else |
d5db4077 | 3327 | nbytes = SBYTES (str2); |
43d27a72 | 3328 | |
0065d054 PE |
3329 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3330 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3331 | ssl->bytes += nbytes; |
3332 | } | |
e8185fa8 | 3333 | } |
bbbe9545 | 3334 | |
74a9022a EZ |
3335 | /* Concatenate the strings associated with overlays that begin or end |
3336 | at POS, ignoring overlays that are specific to windows other than W. | |
3337 | The strings are concatenated in the appropriate order: shorter | |
3338 | overlays nest inside longer ones, and higher priority inside lower. | |
3339 | Normally all of the after-strings come first, but zero-sized | |
3340 | overlays have their after-strings ride along with the | |
3341 | before-strings because it would look strange to print them | |
3342 | inside-out. | |
3343 | ||
3344 | Returns the concatenated string's length, and return the pointer to | |
3345 | that string via PSTR, if that variable is non-NULL. The storage of | |
3346 | the concatenated strings may be overwritten by subsequent calls. */ | |
6b5d3b89 | 3347 | |
d311d28c PE |
3348 | ptrdiff_t |
3349 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3350 | { |
28545e04 | 3351 | Lisp_Object overlay, window, str; |
2410d73a | 3352 | struct Lisp_Overlay *ov; |
d311d28c | 3353 | ptrdiff_t startpos, endpos; |
37ef52bb | 3354 | bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3355 | |
e8185fa8 KH |
3356 | overlay_heads.used = overlay_heads.bytes = 0; |
3357 | overlay_tails.used = overlay_tails.bytes = 0; | |
fd318b54 | 3358 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3359 | { |
2410d73a | 3360 | XSETMISC (overlay, ov); |
c2d5b10f | 3361 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3362 | |
3363 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3364 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3365 | if (endpos < pos) | |
3366 | break; | |
3367 | if (endpos != pos && startpos != pos) | |
3368 | continue; | |
3369 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3370 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3371 | continue; |
e8185fa8 KH |
3372 | if (startpos == pos |
3373 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3374 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3375 | (startpos == endpos |
3376 | ? Foverlay_get (overlay, Qafter_string) | |
3377 | : Qnil), | |
3378 | Foverlay_get (overlay, Qpriority), | |
3379 | endpos - startpos); | |
3380 | else if (endpos == pos | |
3381 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3382 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3383 | Foverlay_get (overlay, Qpriority), |
3384 | endpos - startpos); | |
bbbe9545 | 3385 | } |
fd318b54 | 3386 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3387 | { |
2410d73a SM |
3388 | XSETMISC (overlay, ov); |
3389 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3390 | |
3391 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3392 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3393 | if (startpos > pos) | |
3394 | break; | |
e8185fa8 KH |
3395 | if (endpos != pos && startpos != pos) |
3396 | continue; | |
3397 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3398 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3399 | continue; |
e8185fa8 KH |
3400 | if (startpos == pos |
3401 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3402 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3403 | (startpos == endpos |
3404 | ? Foverlay_get (overlay, Qafter_string) | |
3405 | : Qnil), | |
3406 | Foverlay_get (overlay, Qpriority), | |
3407 | endpos - startpos); | |
3408 | else if (endpos == pos | |
3409 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3410 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3411 | Foverlay_get (overlay, Qpriority), |
3412 | endpos - startpos); | |
bbbe9545 | 3413 | } |
e8185fa8 KH |
3414 | if (overlay_tails.used > 1) |
3415 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3416 | cmp_for_strings); | |
3417 | if (overlay_heads.used > 1) | |
3418 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3419 | cmp_for_strings); | |
3420 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3421 | { |
e8185fa8 | 3422 | Lisp_Object tem; |
d311d28c | 3423 | ptrdiff_t i; |
9f4d7cde | 3424 | unsigned char *p; |
0065d054 | 3425 | ptrdiff_t total; |
bbbe9545 | 3426 | |
0065d054 PE |
3427 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3428 | memory_full (SIZE_MAX); | |
3429 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3430 | if (total > overlay_str_len) |
0065d054 PE |
3431 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3432 | total - overlay_str_len, -1, 1); | |
3433 | ||
bbbe9545 | 3434 | p = overlay_str_buf; |
e8185fa8 | 3435 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3436 | { |
d311d28c | 3437 | ptrdiff_t nbytes; |
e8185fa8 | 3438 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3439 | nbytes = copy_text (SDATA (tem), p, |
3440 | SBYTES (tem), | |
43d27a72 RS |
3441 | STRING_MULTIBYTE (tem), multibyte); |
3442 | p += nbytes; | |
bbbe9545 | 3443 | } |
e8185fa8 | 3444 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3445 | { |
d311d28c | 3446 | ptrdiff_t nbytes; |
e8185fa8 | 3447 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3448 | nbytes = copy_text (SDATA (tem), p, |
3449 | SBYTES (tem), | |
43d27a72 RS |
3450 | STRING_MULTIBYTE (tem), multibyte); |
3451 | p += nbytes; | |
cb26008f KH |
3452 | tem = overlay_heads.buf[i].string2; |
3453 | if (STRINGP (tem)) | |
3454 | { | |
d5db4077 KR |
3455 | nbytes = copy_text (SDATA (tem), p, |
3456 | SBYTES (tem), | |
43d27a72 RS |
3457 | STRING_MULTIBYTE (tem), multibyte); |
3458 | p += nbytes; | |
cb26008f | 3459 | } |
bbbe9545 | 3460 | } |
cb26008f | 3461 | if (p != overlay_str_buf + total) |
1088b922 | 3462 | emacs_abort (); |
bbbe9545 KH |
3463 | if (pstr) |
3464 | *pstr = overlay_str_buf; | |
e8185fa8 | 3465 | return total; |
bbbe9545 | 3466 | } |
e8185fa8 | 3467 | return 0; |
bbbe9545 KH |
3468 | } |
3469 | \f | |
5c4f68f1 | 3470 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3471 | |
2eec3b4e | 3472 | void |
d311d28c | 3473 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3474 | { |
2410d73a SM |
3475 | Lisp_Object overlay, beg, end; |
3476 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3477 | |
3478 | /* See if anything in overlays_before should move to overlays_after. */ | |
3479 | ||
3480 | /* We don't strictly need prev in this loop; it should always be nil. | |
3481 | But we use it for symmetry and in case that should cease to be true | |
3482 | with some future change. */ | |
2410d73a | 3483 | prev = NULL; |
fd318b54 | 3484 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) |
1ab256cb | 3485 | { |
2410d73a SM |
3486 | next = tail->next; |
3487 | XSETMISC (overlay, tail); | |
22657b40 | 3488 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3489 | |
2eec3b4e RS |
3490 | beg = OVERLAY_START (overlay); |
3491 | end = OVERLAY_END (overlay); | |
1ab256cb | 3492 | |
2eec3b4e | 3493 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3494 | { |
2eec3b4e | 3495 | /* OVERLAY needs to be moved. */ |
d311d28c | 3496 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3497 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3498 | |
3499 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3500 | if (prev) |
3501 | prev->next = next; | |
2eec3b4e | 3502 | else |
0c94c8d6 | 3503 | set_buffer_overlays_before (buf, next); |
2eec3b4e RS |
3504 | |
3505 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3506 | other_prev = NULL; |
fd318b54 | 3507 | for (other = buf->overlays_after; other; |
2410d73a | 3508 | other_prev = other, other = other->next) |
1ab256cb | 3509 | { |
6af718a4 | 3510 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3511 | |
2410d73a | 3512 | XSETMISC (otheroverlay, other); |
22657b40 | 3513 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3514 | |
3515 | otherbeg = OVERLAY_START (otheroverlay); | |
3516 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3517 | break; | |
1ab256cb | 3518 | } |
2eec3b4e RS |
3519 | |
3520 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3521 | tail->next = other; |
3522 | if (other_prev) | |
3523 | other_prev->next = tail; | |
1ab256cb | 3524 | else |
0c94c8d6 | 3525 | set_buffer_overlays_after (buf, tail); |
2eec3b4e | 3526 | tail = prev; |
1ab256cb | 3527 | } |
2eec3b4e RS |
3528 | else |
3529 | /* We've reached the things that should stay in overlays_before. | |
3530 | All the rest of overlays_before must end even earlier, | |
3531 | so stop now. */ | |
3532 | break; | |
3533 | } | |
3534 | ||
3535 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3536 | prev = NULL; |
fd318b54 | 3537 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) |
2eec3b4e | 3538 | { |
2410d73a SM |
3539 | next = tail->next; |
3540 | XSETMISC (overlay, tail); | |
22657b40 | 3541 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3542 | |
3543 | beg = OVERLAY_START (overlay); | |
3544 | end = OVERLAY_END (overlay); | |
3545 | ||
3546 | /* Stop looking, when we know that nothing further | |
3547 | can possibly end before POS. */ | |
3548 | if (OVERLAY_POSITION (beg) > pos) | |
3549 | break; | |
3550 | ||
3551 | if (OVERLAY_POSITION (end) <= pos) | |
3552 | { | |
3553 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3554 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3555 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3556 | |
3557 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3558 | if (prev) |
3559 | prev->next = next; | |
2eec3b4e | 3560 | else |
0c94c8d6 | 3561 | set_buffer_overlays_after (buf, next); |
2eec3b4e RS |
3562 | |
3563 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3564 | other_prev = NULL; |
fd318b54 | 3565 | for (other = buf->overlays_before; other; |
2410d73a | 3566 | other_prev = other, other = other->next) |
2eec3b4e RS |
3567 | { |
3568 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3569 | |
2410d73a | 3570 | XSETMISC (otheroverlay, other); |
22657b40 | 3571 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3572 | |
3573 | otherend = OVERLAY_END (otheroverlay); | |
3574 | if (OVERLAY_POSITION (otherend) <= where) | |
3575 | break; | |
3576 | } | |
3577 | ||
3578 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3579 | tail->next = other; |
3580 | if (other_prev) | |
3581 | other_prev->next = tail; | |
2eec3b4e | 3582 | else |
0c94c8d6 | 3583 | set_buffer_overlays_before (buf, tail); |
2eec3b4e RS |
3584 | tail = prev; |
3585 | } | |
3586 | } | |
3587 | ||
c2d5b10f | 3588 | buf->overlay_center = pos; |
2eec3b4e | 3589 | } |
2b1bdf65 | 3590 | |
423cdb46 | 3591 | void |
d311d28c | 3592 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3593 | { |
3594 | /* After an insertion, the lists are still sorted properly, | |
3595 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3596 | if (current_buffer->overlay_center >= pos) |
3597 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3598 | } |
3599 | ||
3600 | void | |
d311d28c | 3601 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3602 | { |
c2d5b10f | 3603 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3604 | /* The deletion was to our right. No change needed; the before- and |
3605 | after-lists are still consistent. */ | |
3606 | ; | |
d311d28c | 3607 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3608 | /* The deletion was to our left. We need to adjust the center value |
3609 | to account for the change in position, but the lists are consistent | |
3610 | given the new value. */ | |
c2d5b10f | 3611 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3612 | else |
3613 | /* We're right in the middle. There might be things on the after-list | |
3614 | that now belong on the before-list. Recentering will move them, | |
3615 | and also update the center point. */ | |
3616 | recenter_overlay_lists (current_buffer, pos); | |
3617 | } | |
3618 | ||
2b1bdf65 KH |
3619 | /* Fix up overlays that were garbled as a result of permuting markers |
3620 | in the range START through END. Any overlay with at least one | |
3621 | endpoint in this range will need to be unlinked from the overlay | |
3622 | list and reinserted in its proper place. | |
3623 | Such an overlay might even have negative size at this point. | |
6b61353c | 3624 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3625 | void |
d311d28c | 3626 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3627 | { |
6af718a4 | 3628 | Lisp_Object overlay; |
5df8f01b PE |
3629 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3630 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3631 | /* These are either nil, indicating that before_list or after_list |
3632 | should be assigned, or the cons cell the cdr of which should be | |
3633 | assigned. */ | |
2410d73a | 3634 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3635 | /* 'Parent', likewise, indicates a cons cell or |
fd318b54 | 3636 | current_buffer->overlays_before or overlays_after, depending |
1138e742 | 3637 | which loop we're in. */ |
2410d73a | 3638 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3639 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3640 | |
3641 | /* This algorithm shifts links around instead of consing and GCing. | |
3642 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3643 | well-formed list except that its last element, the CDR of beforep |
3644 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3645 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3646 | that before_list isn't initialized, although it may look | |
3647 | strange. */ | |
fd318b54 | 3648 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3649 | { |
2410d73a | 3650 | XSETMISC (overlay, tail); |
6b61353c | 3651 | |
2b1bdf65 | 3652 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3653 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3654 | ||
3655 | /* If the overlay is backwards, make it empty. */ | |
3656 | if (endpos < startpos) | |
3657 | { | |
3658 | startpos = endpos; | |
3659 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3660 | Qnil); | |
3661 | } | |
3662 | ||
2b1bdf65 KH |
3663 | if (endpos < start) |
3664 | break; | |
60ebfdf3 | 3665 | |
2b1bdf65 KH |
3666 | if (endpos < end |
3667 | || (startpos >= start && startpos < end)) | |
3668 | { | |
2b1bdf65 KH |
3669 | /* Add it to the end of the wrong list. Later on, |
3670 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3671 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3672 | { |
2410d73a | 3673 | if (!afterp) |
1138e742 KR |
3674 | after_list = tail; |
3675 | else | |
2410d73a | 3676 | afterp->next = tail; |
1138e742 | 3677 | afterp = tail; |
2b1bdf65 KH |
3678 | } |
3679 | else | |
3680 | { | |
2410d73a | 3681 | if (!beforep) |
1138e742 KR |
3682 | before_list = tail; |
3683 | else | |
2410d73a | 3684 | beforep->next = tail; |
1138e742 | 3685 | beforep = tail; |
2b1bdf65 | 3686 | } |
2410d73a | 3687 | if (!parent) |
0c94c8d6 | 3688 | set_buffer_overlays_before (current_buffer, tail->next); |
1138e742 | 3689 | else |
2410d73a SM |
3690 | parent->next = tail->next; |
3691 | tail = tail->next; | |
2b1bdf65 KH |
3692 | } |
3693 | else | |
2410d73a | 3694 | parent = tail, tail = parent->next; |
2b1bdf65 | 3695 | } |
fd318b54 | 3696 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3697 | { |
2410d73a | 3698 | XSETMISC (overlay, tail); |
6b61353c | 3699 | |
2b1bdf65 | 3700 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3701 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3702 | ||
3703 | /* If the overlay is backwards, make it empty. */ | |
3704 | if (endpos < startpos) | |
3705 | { | |
3706 | startpos = endpos; | |
3707 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3708 | Qnil); |
6b61353c KH |
3709 | } |
3710 | ||
2b1bdf65 KH |
3711 | if (startpos >= end) |
3712 | break; | |
6b61353c | 3713 | |
2b1bdf65 KH |
3714 | if (startpos >= start |
3715 | || (endpos >= start && endpos < end)) | |
3716 | { | |
c2d5b10f | 3717 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3718 | { |
2410d73a | 3719 | if (!afterp) |
1138e742 KR |
3720 | after_list = tail; |
3721 | else | |
2410d73a | 3722 | afterp->next = tail; |
1138e742 | 3723 | afterp = tail; |
2b1bdf65 KH |
3724 | } |
3725 | else | |
3726 | { | |
2410d73a | 3727 | if (!beforep) |
1138e742 KR |
3728 | before_list = tail; |
3729 | else | |
2410d73a | 3730 | beforep->next = tail; |
1138e742 | 3731 | beforep = tail; |
2b1bdf65 | 3732 | } |
2410d73a | 3733 | if (!parent) |
0c94c8d6 | 3734 | set_buffer_overlays_after (current_buffer, tail->next); |
1138e742 | 3735 | else |
2410d73a SM |
3736 | parent->next = tail->next; |
3737 | tail = tail->next; | |
2b1bdf65 KH |
3738 | } |
3739 | else | |
2410d73a | 3740 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3741 | } |
3742 | ||
3743 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3744 | and let the recenter function make it sane again. */ | |
2410d73a | 3745 | if (beforep) |
1138e742 | 3746 | { |
fd318b54 | 3747 | beforep->next = current_buffer->overlays_before; |
0c94c8d6 | 3748 | set_buffer_overlays_before (current_buffer, before_list); |
1138e742 | 3749 | } |
2b1bdf65 | 3750 | |
2410d73a | 3751 | if (afterp) |
1138e742 | 3752 | { |
fd318b54 | 3753 | afterp->next = current_buffer->overlays_after; |
0c94c8d6 | 3754 | set_buffer_overlays_after (current_buffer, after_list); |
1138e742 | 3755 | } |
c2d5b10f | 3756 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3757 | } |
3b06f880 KH |
3758 | |
3759 | /* We have two types of overlay: the one whose ending marker is | |
3760 | after-insertion-marker (this is the usual case) and the one whose | |
3761 | ending marker is before-insertion-marker. When `overlays_before' | |
3762 | contains overlays of the latter type and the former type in this | |
3763 | order and both overlays end at inserting position, inserting a text | |
3764 | increases only the ending marker of the latter type, which results | |
3765 | in incorrect ordering of `overlays_before'. | |
3766 | ||
3767 | This function fixes ordering of overlays in the slot | |
3768 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3769 | was at PREV, and now is at POS. */ | |
3770 | ||
01136e9b | 3771 | void |
d311d28c | 3772 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3773 | { |
2410d73a | 3774 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
fd318b54 | 3775 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; |
2410d73a | 3776 | Lisp_Object tem; |
d311d28c | 3777 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3778 | |
3779 | /* After the insertion, the several overlays may be in incorrect | |
3780 | order. The possibility is that, in the list `overlays_before', | |
3781 | an overlay which ends at POS appears after an overlay which ends | |
3782 | at PREV. Since POS is greater than PREV, we must fix the | |
3783 | ordering of these overlays, by moving overlays ends at POS before | |
3784 | the overlays ends at PREV. */ | |
3785 | ||
3786 | /* At first, find a place where disordered overlays should be linked | |
3787 | in. It is where an overlay which end before POS exists. (i.e. an | |
3788 | overlay whose ending marker is after-insertion-marker if disorder | |
3789 | exists). */ | |
2410d73a SM |
3790 | while (tail |
3791 | && (XSETMISC (tem, tail), | |
3792 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3793 | { |
3794 | parent = tail; | |
2410d73a | 3795 | tail = tail->next; |
1138e742 | 3796 | } |
3b06f880 KH |
3797 | |
3798 | /* If we don't find such an overlay, | |
3799 | or the found one ends before PREV, | |
3800 | or the found one is the last one in the list, | |
3801 | we don't have to fix anything. */ | |
f93ad4cf | 3802 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3803 | return; |
3804 | ||
1138e742 KR |
3805 | right_pair = parent; |
3806 | parent = tail; | |
2410d73a | 3807 | tail = tail->next; |
3b06f880 | 3808 | |
1138e742 | 3809 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3810 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3811 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3812 | we found an overlay which ends before PREV, the remaining | |
3813 | overlays are in correct order. */ | |
2410d73a | 3814 | while (tail) |
3b06f880 | 3815 | { |
2410d73a SM |
3816 | XSETMISC (tem, tail); |
3817 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3818 | |
3819 | if (end == pos) | |
3820 | { /* This overlay is disordered. */ | |
2410d73a | 3821 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3822 | |
3823 | /* Unlink the found overlay. */ | |
2410d73a SM |
3824 | tail = found->next; |
3825 | parent->next = tail; | |
1138e742 KR |
3826 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3827 | and link it into the right place. */ | |
2410d73a | 3828 | if (!right_pair) |
1138e742 | 3829 | { |
fd318b54 | 3830 | found->next = bp->overlays_before; |
0c94c8d6 | 3831 | set_buffer_overlays_before (bp, found); |
1138e742 KR |
3832 | } |
3833 | else | |
3834 | { | |
2410d73a SM |
3835 | found->next = right_pair->next; |
3836 | right_pair->next = found; | |
1138e742 | 3837 | } |
3b06f880 KH |
3838 | } |
3839 | else if (end == prev) | |
1138e742 KR |
3840 | { |
3841 | parent = tail; | |
2410d73a | 3842 | tail = tail->next; |
1138e742 | 3843 | } |
3b06f880 KH |
3844 | else /* No more disordered overlay. */ |
3845 | break; | |
3846 | } | |
3847 | } | |
2eec3b4e | 3848 | \f |
52f8ec73 | 3849 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3850 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3851 | (Lisp_Object object) |
52f8ec73 JB |
3852 | { |
3853 | return (OVERLAYP (object) ? Qt : Qnil); | |
3854 | } | |
3855 | ||
acac2700 | 3856 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
af3e68a0 | 3857 | doc: /* Create a new overlay with range BEG to END in BUFFER and return it. |
018ba359 PJ |
3858 | If omitted, BUFFER defaults to the current buffer. |
3859 | BEG and END may be integers or markers. | |
a625ee20 RS |
3860 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3861 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3862 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3863 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3864 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3865 | \(which means the text *is* included in the overlay). */) |
b1cf96de DA |
3866 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, |
3867 | Lisp_Object front_advance, Lisp_Object rear_advance) | |
2eec3b4e RS |
3868 | { |
3869 | Lisp_Object overlay; | |
5c4f68f1 | 3870 | struct buffer *b; |
2eec3b4e | 3871 | |
5c4f68f1 | 3872 | if (NILP (buffer)) |
67180c6a | 3873 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3874 | else |
b7826503 | 3875 | CHECK_BUFFER (buffer); |
b1cf96de DA |
3876 | |
3877 | if (MARKERP (beg) && !EQ (Fmarker_buffer (beg), buffer)) | |
3878 | signal_error ("Marker points into wrong buffer", beg); | |
3879 | if (MARKERP (end) && !EQ (Fmarker_buffer (end), buffer)) | |
3880 | signal_error ("Marker points into wrong buffer", end); | |
2eec3b4e | 3881 | |
b7826503 PJ |
3882 | CHECK_NUMBER_COERCE_MARKER (beg); |
3883 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3884 | |
883047b9 | 3885 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3886 | { |
c99fc30f KH |
3887 | Lisp_Object temp; |
3888 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3889 | } |
883047b9 JB |
3890 | |
3891 | b = XBUFFER (buffer); | |
3892 | ||
3893 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3894 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3895 | |
acac2700 RS |
3896 | if (!NILP (front_advance)) |
3897 | XMARKER (beg)->insertion_type = 1; | |
3898 | if (!NILP (rear_advance)) | |
3899 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3900 | |
d7a7fda3 | 3901 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3902 | |
177c0ea7 | 3903 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3904 | end = OVERLAY_END (overlay); |
c2d5b10f | 3905 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3906 | { |
64edc777 | 3907 | eassert (b->overlays_after || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3908 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 3909 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 3910 | } |
2eec3b4e | 3911 | else |
2410d73a | 3912 | { |
64edc777 | 3913 | eassert (b->overlays_before || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3914 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 3915 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 3916 | } |
2eec3b4e | 3917 | /* This puts it in the right list, and in the right order. */ |
c2d5b10f | 3918 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3919 | |
b61982dd JB |
3920 | /* We don't need to redisplay the region covered by the overlay, because |
3921 | the overlay has no properties at the moment. */ | |
3922 | ||
2eec3b4e RS |
3923 | return overlay; |
3924 | } | |
876aa27c RS |
3925 | \f |
3926 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3927 | ||
3928 | static void | |
d311d28c | 3929 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3930 | { |
876aa27c RS |
3931 | if (start > end) |
3932 | { | |
d311d28c | 3933 | ptrdiff_t temp = start; |
26f545d7 GM |
3934 | start = end; |
3935 | end = temp; | |
876aa27c RS |
3936 | } |
3937 | ||
481b5054 | 3938 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3939 | |
655ab9a3 | 3940 | bset_redisplay (buf); |
876aa27c | 3941 | |
d8b9150f | 3942 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3943 | } |
2eec3b4e | 3944 | |
7b7ae965 DA |
3945 | /* Remove OVERLAY from LIST. */ |
3946 | ||
2410d73a | 3947 | static struct Lisp_Overlay * |
d3da34e0 | 3948 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3949 | { |
7b7ae965 DA |
3950 | register struct Lisp_Overlay *tail, **prev = &list; |
3951 | ||
3952 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3953 | if (tail == overlay) | |
2410d73a | 3954 | { |
7b7ae965 | 3955 | *prev = overlay->next; |
2410d73a SM |
3956 | overlay->next = NULL; |
3957 | break; | |
3958 | } | |
3959 | return list; | |
3960 | } | |
3961 | ||
4cb3e6b3 DA |
3962 | /* Remove OVERLAY from both overlay lists of B. */ |
3963 | ||
3964 | static void | |
3965 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3966 | { | |
3967 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3968 | ||
0c94c8d6 PE |
3969 | set_buffer_overlays_before (b, unchain_overlay (b->overlays_before, ov)); |
3970 | set_buffer_overlays_after (b, unchain_overlay (b->overlays_after, ov)); | |
fd318b54 | 3971 | eassert (XOVERLAY (overlay)->next == NULL); |
4cb3e6b3 DA |
3972 | } |
3973 | ||
5c4f68f1 | 3974 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3975 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3976 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3977 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3978 | buffer. */) |
5842a27b | 3979 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3980 | { |
471fe23d | 3981 | struct buffer *b, *ob = 0; |
0a4469c9 | 3982 | Lisp_Object obuffer; |
d311d28c | 3983 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3984 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3985 | |
b7826503 | 3986 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3987 | if (NILP (buffer)) |
3988 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3989 | if (NILP (buffer)) |
67180c6a | 3990 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3991 | CHECK_BUFFER (buffer); |
883047b9 | 3992 | |
471fe23d TN |
3993 | if (NILP (Fbuffer_live_p (buffer))) |
3994 | error ("Attempt to move overlay to a dead buffer"); | |
3995 | ||
b1cf96de DA |
3996 | if (MARKERP (beg) && !EQ (Fmarker_buffer (beg), buffer)) |
3997 | signal_error ("Marker points into wrong buffer", beg); | |
3998 | if (MARKERP (end) && !EQ (Fmarker_buffer (end), buffer)) | |
3999 | signal_error ("Marker points into wrong buffer", end); | |
883047b9 | 4000 | |
b7826503 PJ |
4001 | CHECK_NUMBER_COERCE_MARKER (beg); |
4002 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 4003 | |
471fe23d | 4004 | if (XINT (beg) > XINT (end)) |
02481186 | 4005 | { |
471fe23d TN |
4006 | Lisp_Object temp; |
4007 | temp = beg; beg = end; end = temp; | |
02481186 PE |
4008 | } |
4009 | ||
9d7608b7 KH |
4010 | specbind (Qinhibit_quit, Qt); |
4011 | ||
0a4469c9 | 4012 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 4013 | b = XBUFFER (buffer); |
471fe23d TN |
4014 | |
4015 | if (!NILP (obuffer)) | |
4016 | { | |
4017 | ob = XBUFFER (obuffer); | |
4018 | ||
4019 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
4020 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
4021 | ||
4cb3e6b3 | 4022 | unchain_both (ob, overlay); |
471fe23d TN |
4023 | } |
4024 | ||
4025 | /* Set the overlay boundaries, which may clip them. */ | |
4026 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
4027 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
4028 | ||
4029 | n_beg = marker_position (OVERLAY_START (overlay)); | |
4030 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 4031 | |
c82ed728 | 4032 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 4033 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
4034 | { |
4035 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
4036 | if (ob) |
4037 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
4038 | |
4039 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 4040 | modify_overlay (b, n_beg, n_end); |
50760c4a | 4041 | } |
c82ed728 JB |
4042 | else |
4043 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
4044 | { | |
79cce3f2 PE |
4045 | if (o_beg == n_beg) |
4046 | modify_overlay (b, o_end, n_end); | |
4047 | else if (o_end == n_end) | |
4048 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 4049 | else |
79cce3f2 | 4050 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 4051 | } |
b61982dd | 4052 | |
471fe23d TN |
4053 | /* Delete the overlay if it is empty after clipping and has the |
4054 | evaporate property. */ | |
4055 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
4056 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 4057 | |
471fe23d TN |
4058 | /* Put the overlay into the new buffer's overlay lists, first on the |
4059 | wrong list. */ | |
4060 | if (n_end < b->overlay_center) | |
2410d73a | 4061 | { |
fd318b54 | 4062 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 4063 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 4064 | } |
2eec3b4e | 4065 | else |
2410d73a | 4066 | { |
fd318b54 | 4067 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 4068 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 4069 | } |
2eec3b4e RS |
4070 | |
4071 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4072 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4073 | |
0a4469c9 | 4074 | return unbind_to (count, overlay); |
2eec3b4e RS |
4075 | } |
4076 | ||
4077 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 4078 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 4079 | (Lisp_Object overlay) |
2eec3b4e | 4080 | { |
0a4469c9 | 4081 | Lisp_Object buffer; |
5c4f68f1 | 4082 | struct buffer *b; |
d311d28c | 4083 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 4084 | |
b7826503 | 4085 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4086 | |
0a4469c9 RS |
4087 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4088 | if (NILP (buffer)) | |
4089 | return Qnil; | |
4090 | ||
4091 | b = XBUFFER (buffer); | |
0a4469c9 | 4092 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4093 | |
4cb3e6b3 | 4094 | unchain_both (b, overlay); |
041a49a6 | 4095 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 4096 | |
e58c389d | 4097 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4098 | display optimizations for the affected buffer, on the basis that |
4099 | these strings may contain newlines. This is easier to do than to | |
4100 | check for that situation during redisplay. */ | |
4101 | if (!windows_or_buffers_changed | |
4102 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4103 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4104 | b->prevent_redisplay_optimizations_p = 1; | |
4105 | ||
0a4469c9 | 4106 | return unbind_to (count, Qnil); |
2eec3b4e | 4107 | } |
c5e28e39 MR |
4108 | |
4109 | DEFUN ("delete-all-overlays", Fdelete_all_overlays, Sdelete_all_overlays, 0, 1, 0, | |
4110 | doc: /* Delete all overlays of BUFFER. | |
4111 | BUFFER omitted or nil means delete all overlays of the current | |
4112 | buffer. */) | |
4113 | (Lisp_Object buffer) | |
4114 | { | |
4115 | register struct buffer *buf; | |
4116 | ||
4117 | if (NILP (buffer)) | |
4118 | buf = current_buffer; | |
4119 | else | |
4120 | { | |
4121 | CHECK_BUFFER (buffer); | |
4122 | buf = XBUFFER (buffer); | |
4123 | } | |
4124 | ||
4125 | delete_all_overlays (buf); | |
26d4541d | 4126 | return Qnil; |
c5e28e39 | 4127 | } |
2eec3b4e | 4128 | \f |
8ebafa8d JB |
4129 | /* Overlay dissection functions. */ |
4130 | ||
a7ca3326 | 4131 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 4132 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 4133 | (Lisp_Object overlay) |
8ebafa8d | 4134 | { |
b7826503 | 4135 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4136 | |
4137 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4138 | } | |
4139 | ||
a7ca3326 | 4140 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 4141 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 4142 | (Lisp_Object overlay) |
8ebafa8d | 4143 | { |
b7826503 | 4144 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4145 | |
4146 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4147 | } | |
4148 | ||
4149 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4150 | doc: /* Return the buffer OVERLAY belongs to. |
4151 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 4152 | (Lisp_Object overlay) |
8ebafa8d | 4153 | { |
b7826503 | 4154 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4155 | |
4156 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4157 | } | |
4158 | ||
4159 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4160 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4161 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 4162 | OVERLAY. */) |
5842a27b | 4163 | (Lisp_Object overlay) |
8ebafa8d | 4164 | { |
b7826503 | 4165 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4166 | |
c644523b | 4167 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4168 | } |
4169 | ||
4170 | \f | |
20fa59a0 SM |
4171 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 2, 0, |
4172 | doc: /* Return a list of the overlays that contain the character at POS. | |
4173 | If SORTED is non-nil, then sort them by decreasing priority. */) | |
4174 | (Lisp_Object pos, Lisp_Object sorted) | |
2eec3b4e | 4175 | { |
b081724f | 4176 | ptrdiff_t len, noverlays; |
2eec3b4e | 4177 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
4178 | Lisp_Object result; |
4179 | ||
b7826503 | 4180 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4181 | |
6bdcbfe1 DA |
4182 | if (!buffer_has_overlays ()) |
4183 | return Qnil; | |
4184 | ||
2eec3b4e | 4185 | len = 10; |
a9800ae8 | 4186 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 4187 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4188 | |
4189 | /* Put all the overlays we want in a vector in overlay_vec. | |
4190 | Store the length in len. */ | |
2a77a7d7 | 4191 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
090cf9db | 4192 | NULL, NULL, 0); |
2eec3b4e | 4193 | |
20fa59a0 SM |
4194 | if (!NILP (sorted)) |
4195 | noverlays = sort_overlays (overlay_vec, noverlays, | |
4196 | WINDOWP (sorted) ? XWINDOW (sorted) : NULL); | |
4197 | ||
2eec3b4e RS |
4198 | /* Make a list of them all. */ |
4199 | result = Flist (noverlays, overlay_vec); | |
4200 | ||
9ac0d9e0 | 4201 | xfree (overlay_vec); |
2eec3b4e RS |
4202 | return result; |
4203 | } | |
4204 | ||
74514898 | 4205 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4206 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4207 | Overlap means that at least one character is contained within the overlay |
4208 | and also contained within the specified region. | |
7723e095 MR |
4209 | Empty overlays are included in the result if they are located at BEG, |
4210 | between BEG and END, or at END provided END denotes the position at the | |
4211 | end of the buffer. */) | |
5842a27b | 4212 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 4213 | { |
21514da7 | 4214 | ptrdiff_t len, noverlays; |
74514898 | 4215 | Lisp_Object *overlay_vec; |
74514898 RS |
4216 | Lisp_Object result; |
4217 | ||
b7826503 PJ |
4218 | CHECK_NUMBER_COERCE_MARKER (beg); |
4219 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 | 4220 | |
6bdcbfe1 DA |
4221 | if (!buffer_has_overlays ()) |
4222 | return Qnil; | |
4223 | ||
74514898 | 4224 | len = 10; |
38182d90 | 4225 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
4226 | |
4227 | /* Put all the overlays we want in a vector in overlay_vec. | |
4228 | Store the length in len. */ | |
4229 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 4230 | NULL, NULL); |
74514898 RS |
4231 | |
4232 | /* Make a list of them all. */ | |
4233 | result = Flist (noverlays, overlay_vec); | |
4234 | ||
4235 | xfree (overlay_vec); | |
4236 | return result; | |
4237 | } | |
4238 | ||
a7ca3326 | 4239 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4240 | 1, 1, 0, |
7ee72033 | 4241 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4242 | If there are no overlay boundaries from POS to (point-max), |
4243 | the value is (point-max). */) | |
5842a27b | 4244 | (Lisp_Object pos) |
2eec3b4e | 4245 | { |
b081724f | 4246 | ptrdiff_t i, len, noverlays; |
d311d28c | 4247 | ptrdiff_t endpos; |
2eec3b4e | 4248 | Lisp_Object *overlay_vec; |
2eec3b4e | 4249 | |
b7826503 | 4250 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4251 | |
6bdcbfe1 DA |
4252 | if (!buffer_has_overlays ()) |
4253 | return make_number (ZV); | |
4254 | ||
2eec3b4e | 4255 | len = 10; |
38182d90 | 4256 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4257 | |
4258 | /* Put all the overlays we want in a vector in overlay_vec. | |
4259 | Store the length in len. | |
4260 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4261 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4262 | &endpos, 0, 1); |
2eec3b4e RS |
4263 | |
4264 | /* If any of these overlays ends before endpos, | |
4265 | use its ending point instead. */ | |
4266 | for (i = 0; i < noverlays; i++) | |
4267 | { | |
4268 | Lisp_Object oend; | |
d311d28c | 4269 | ptrdiff_t oendpos; |
2eec3b4e RS |
4270 | |
4271 | oend = OVERLAY_END (overlay_vec[i]); | |
4272 | oendpos = OVERLAY_POSITION (oend); | |
4273 | if (oendpos < endpos) | |
4274 | endpos = oendpos; | |
1ab256cb RM |
4275 | } |
4276 | ||
9ac0d9e0 | 4277 | xfree (overlay_vec); |
2eec3b4e RS |
4278 | return make_number (endpos); |
4279 | } | |
239c932b | 4280 | |
a7ca3326 | 4281 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4282 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4283 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4284 | If there are no overlay boundaries from (point-min) to POS, |
4285 | the value is (point-min). */) | |
5842a27b | 4286 | (Lisp_Object pos) |
239c932b | 4287 | { |
d311d28c | 4288 | ptrdiff_t prevpos; |
239c932b | 4289 | Lisp_Object *overlay_vec; |
b081724f | 4290 | ptrdiff_t len; |
239c932b | 4291 | |
b7826503 | 4292 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4293 | |
6bdcbfe1 DA |
4294 | if (!buffer_has_overlays ()) |
4295 | return make_number (BEGV); | |
4296 | ||
624bbdc4 RS |
4297 | /* At beginning of buffer, we know the answer; |
4298 | avoid bug subtracting 1 below. */ | |
4299 | if (XINT (pos) == BEGV) | |
4300 | return pos; | |
4301 | ||
017f0539 | 4302 | len = 10; |
38182d90 | 4303 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4304 | |
239c932b RS |
4305 | /* Put all the overlays we want in a vector in overlay_vec. |
4306 | Store the length in len. | |
daa1c109 | 4307 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4308 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4309 | 0, &prevpos, 1); |
239c932b | 4310 | |
239c932b RS |
4311 | xfree (overlay_vec); |
4312 | return make_number (prevpos); | |
4313 | } | |
2eec3b4e RS |
4314 | \f |
4315 | /* These functions are for debugging overlays. */ | |
4316 | ||
4317 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4318 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4319 | The car has all the overlays before the overlay center; |
4320 | the cdr has all the overlays after the overlay center. | |
4321 | Recentering overlays moves overlays between these lists. | |
4322 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4323 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4324 | (void) |
2eec3b4e | 4325 | { |
2410d73a SM |
4326 | struct Lisp_Overlay *ol; |
4327 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 | 4328 | |
fd318b54 | 4329 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) |
2410d73a SM |
4330 | { |
4331 | XSETMISC (tmp, ol); | |
4332 | before = Fcons (tmp, before); | |
4333 | } | |
fd318b54 | 4334 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) |
2410d73a SM |
4335 | { |
4336 | XSETMISC (tmp, ol); | |
4337 | after = Fcons (tmp, after); | |
4338 | } | |
4cb3e6b3 | 4339 | |
2410d73a | 4340 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4341 | } |
4342 | ||
4343 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4344 | doc: /* Recenter the overlays of the current buffer around position POS. |
4345 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4346 | for positions far away from POS). */) | |
5842a27b | 4347 | (Lisp_Object pos) |
2eec3b4e | 4348 | { |
d311d28c | 4349 | ptrdiff_t p; |
b7826503 | 4350 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4351 | |
d311d28c PE |
4352 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4353 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4354 | return Qnil; |
4355 | } | |
4356 | \f | |
a7ca3326 | 4357 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4358 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4359 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4360 | { |
b7826503 | 4361 | CHECK_OVERLAY (overlay); |
c644523b | 4362 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4363 | } |
4364 | ||
4365 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4366 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4367 | VALUE will be returned.*/) | |
5842a27b | 4368 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4369 | { |
48e2e3ba | 4370 | Lisp_Object tail, buffer; |
37ef52bb | 4371 | bool changed; |
2eec3b4e | 4372 | |
b7826503 | 4373 | CHECK_OVERLAY (overlay); |
b61982dd | 4374 | |
274a9425 RS |
4375 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4376 | ||
c644523b | 4377 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4378 | CONSP (tail) && CONSP (XCDR (tail)); |
4379 | tail = XCDR (XCDR (tail))) | |
4380 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4381 | { |
7539e11f | 4382 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4383 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4384 | goto found; |
274a9425 | 4385 | } |
9d7608b7 KH |
4386 | /* It wasn't in the list, so add it to the front. */ |
4387 | changed = !NILP (value); | |
c644523b DA |
4388 | set_overlay_plist |
4389 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4390 | found: |
4391 | if (! NILP (buffer)) | |
4392 | { | |
4393 | if (changed) | |
876aa27c | 4394 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4395 | marker_position (OVERLAY_START (overlay)), |
4396 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4397 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4398 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4399 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4400 | Fdelete_overlay (overlay); | |
4401 | } | |
7d63db98 | 4402 | |
2eec3b4e | 4403 | return value; |
1ab256cb RM |
4404 | } |
4405 | \f | |
9115729e KH |
4406 | /* Subroutine of report_overlay_modification. */ |
4407 | ||
4408 | /* Lisp vector holding overlay hook functions to call. | |
4409 | Vector elements come in pairs. | |
4410 | Each even-index element is a list of hook functions. | |
4411 | The following odd-index element is the overlay they came from. | |
4412 | ||
4413 | Before the buffer change, we fill in this vector | |
4414 | as we call overlay hook functions. | |
4415 | After the buffer change, we get the functions to call from this vector. | |
4416 | This way we always call the same functions before and after the change. */ | |
4417 | static Lisp_Object last_overlay_modification_hooks; | |
4418 | ||
4419 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4420 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4421 | |
4422 | /* Add one functionlist/overlay pair | |
4423 | to the end of last_overlay_modification_hooks. */ | |
4424 | ||
4425 | static void | |
d3da34e0 | 4426 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4427 | { |
d311d28c | 4428 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4429 | |
d311d28c PE |
4430 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4431 | last_overlay_modification_hooks = | |
4432 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4433 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4434 | functionlist); last_overlay_modification_hooks_used++; | |
4435 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4436 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4437 | } |
4438 | \f | |
173f2a64 RS |
4439 | /* Run the modification-hooks of overlays that include |
4440 | any part of the text in START to END. | |
9115729e KH |
4441 | If this change is an insertion, also |
4442 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4443 | and the insert-after-hooks of overlay ending at START. |
4444 | ||
4445 | This is called both before and after the modification. | |
37ef52bb | 4446 | AFTER is true when we call after the modification. |
930a9140 | 4447 | |
9115729e KH |
4448 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4449 | When AFTER is nonzero, they are the start position, | |
4450 | the position after the inserted new text, | |
4451 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4452 | |
4453 | void | |
37ef52bb | 4454 | report_overlay_modification (Lisp_Object start, Lisp_Object end, bool after, |
d3da34e0 | 4455 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4456 | { |
2410d73a SM |
4457 | Lisp_Object prop, overlay; |
4458 | struct Lisp_Overlay *tail; | |
37ef52bb PE |
4459 | /* True if this change is an insertion. */ |
4460 | bool insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4461 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4462 | |
4463 | overlay = Qnil; | |
2410d73a | 4464 | tail = NULL; |
9115729e | 4465 | |
27c6b98e SM |
4466 | /* We used to run the functions as soon as we found them and only register |
4467 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4468 | case. But running elisp code as we traverse the list of overlays is | |
4469 | painful because the list can be modified by the elisp code so we had to | |
4470 | copy at several places. We now simply do a read-only traversal that | |
4471 | only collects the functions to run and we run them afterwards. It's | |
4472 | simpler, especially since all the code was already there. -stef */ | |
4473 | ||
a615c6dc | 4474 | if (!after) |
173f2a64 | 4475 | { |
a615c6dc SM |
4476 | /* We are being called before a change. |
4477 | Scan the overlays to find the functions to call. */ | |
4478 | last_overlay_modification_hooks_used = 0; | |
fd318b54 | 4479 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4480 | { |
d311d28c | 4481 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4482 | Lisp_Object ostart, oend; |
4483 | ||
2410d73a | 4484 | XSETMISC (overlay, tail); |
a615c6dc SM |
4485 | |
4486 | ostart = OVERLAY_START (overlay); | |
4487 | oend = OVERLAY_END (overlay); | |
4488 | endpos = OVERLAY_POSITION (oend); | |
4489 | if (XFASTINT (start) > endpos) | |
4490 | break; | |
4491 | startpos = OVERLAY_POSITION (ostart); | |
4492 | if (insertion && (XFASTINT (start) == startpos | |
4493 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4494 | { |
a615c6dc SM |
4495 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4496 | if (!NILP (prop)) | |
4497 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4498 | } |
a615c6dc SM |
4499 | if (insertion && (XFASTINT (start) == endpos |
4500 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4501 | { |
a615c6dc SM |
4502 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4503 | if (!NILP (prop)) | |
4504 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4505 | } |
a615c6dc SM |
4506 | /* Test for intersecting intervals. This does the right thing |
4507 | for both insertion and deletion. */ | |
4508 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4509 | { |
a615c6dc SM |
4510 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4511 | if (!NILP (prop)) | |
4512 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4513 | } |
173f2a64 | 4514 | } |
60ebfdf3 | 4515 | |
fd318b54 | 4516 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4517 | { |
d311d28c | 4518 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4519 | Lisp_Object ostart, oend; |
4520 | ||
2410d73a | 4521 | XSETMISC (overlay, tail); |
a615c6dc SM |
4522 | |
4523 | ostart = OVERLAY_START (overlay); | |
4524 | oend = OVERLAY_END (overlay); | |
4525 | startpos = OVERLAY_POSITION (ostart); | |
4526 | endpos = OVERLAY_POSITION (oend); | |
4527 | if (XFASTINT (end) < startpos) | |
4528 | break; | |
4529 | if (insertion && (XFASTINT (start) == startpos | |
4530 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4531 | { |
a615c6dc SM |
4532 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4533 | if (!NILP (prop)) | |
4534 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4535 | } |
a615c6dc SM |
4536 | if (insertion && (XFASTINT (start) == endpos |
4537 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4538 | { |
a615c6dc SM |
4539 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4540 | if (!NILP (prop)) | |
4541 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4542 | } |
a615c6dc SM |
4543 | /* Test for intersecting intervals. This does the right thing |
4544 | for both insertion and deletion. */ | |
4545 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4546 | { |
a615c6dc SM |
4547 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4548 | if (!NILP (prop)) | |
4549 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4550 | } |
173f2a64 RS |
4551 | } |
4552 | } | |
55b48893 | 4553 | |
a615c6dc SM |
4554 | GCPRO4 (overlay, arg1, arg2, arg3); |
4555 | { | |
4556 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4557 | First copy the vector contents, in case some of these hooks | |
4558 | do subsequent modification of the buffer. */ | |
d311d28c | 4559 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4560 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4561 | ptrdiff_t i; |
a615c6dc | 4562 | |
91f2d272 | 4563 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4564 | size * word_size); |
a615c6dc SM |
4565 | gcpro1.var = copy; |
4566 | gcpro1.nvars = size; | |
4567 | ||
4568 | for (i = 0; i < size;) | |
4569 | { | |
8f54f30a PE |
4570 | Lisp_Object prop_i, overlay_i; |
4571 | prop_i = copy[i++]; | |
4572 | overlay_i = copy[i++]; | |
4573 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4574 | } |
4575 | } | |
55b48893 | 4576 | UNGCPRO; |
173f2a64 RS |
4577 | } |
4578 | ||
4579 | static void | |
37ef52bb | 4580 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, bool after, |
d3da34e0 | 4581 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4582 | { |
930a9140 | 4583 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4584 | |
930a9140 | 4585 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4586 | |
6d70a280 | 4587 | while (CONSP (list)) |
173f2a64 | 4588 | { |
930a9140 | 4589 | if (NILP (arg3)) |
6d70a280 | 4590 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4591 | else |
6d70a280 SM |
4592 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4593 | list = XCDR (list); | |
173f2a64 RS |
4594 | } |
4595 | UNGCPRO; | |
4596 | } | |
9d7608b7 KH |
4597 | |
4598 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4599 | property is set. */ | |
4600 | void | |
d311d28c | 4601 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4602 | { |
2410d73a SM |
4603 | Lisp_Object overlay, hit_list; |
4604 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4605 | |
4606 | hit_list = Qnil; | |
c2d5b10f | 4607 | if (pos <= current_buffer->overlay_center) |
fd318b54 | 4608 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4609 | { |
d311d28c | 4610 | ptrdiff_t endpos; |
2410d73a | 4611 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4612 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4613 | if (endpos < pos) | |
4614 | break; | |
4615 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4616 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4617 | hit_list = Fcons (overlay, hit_list); |
4618 | } | |
4619 | else | |
fd318b54 | 4620 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4621 | { |
d311d28c | 4622 | ptrdiff_t startpos; |
2410d73a | 4623 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4624 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4625 | if (startpos > pos) | |
4626 | break; | |
4627 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4628 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4629 | hit_list = Fcons (overlay, hit_list); |
4630 | } | |
7539e11f KR |
4631 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4632 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4633 | } |
1bf08baf | 4634 | |
b86af064 GM |
4635 | /*********************************************************************** |
4636 | Allocation with mmap | |
4637 | ***********************************************************************/ | |
4638 | ||
587fd086 FP |
4639 | /* Note: WINDOWSNT implements this stuff on w32heap.c. */ |
4640 | #if defined USE_MMAP_FOR_BUFFERS && !defined WINDOWSNT | |
b86af064 | 4641 | |
b86af064 GM |
4642 | #include <sys/mman.h> |
4643 | ||
4644 | #ifndef MAP_ANON | |
4645 | #ifdef MAP_ANONYMOUS | |
4646 | #define MAP_ANON MAP_ANONYMOUS | |
4647 | #else | |
4648 | #define MAP_ANON 0 | |
4649 | #endif | |
4650 | #endif | |
4651 | ||
09dfdf85 GM |
4652 | #ifndef MAP_FAILED |
4653 | #define MAP_FAILED ((void *) -1) | |
4654 | #endif | |
4655 | ||
b86af064 GM |
4656 | #if MAP_ANON == 0 |
4657 | #include <fcntl.h> | |
4658 | #endif | |
4659 | ||
4660 | #include "coding.h" | |
4661 | ||
4662 | ||
4663 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4664 | The current implementation lets the system select mapped | |
4665 | addresses; we're not using MAP_FIXED in general, except when | |
4666 | trying to enlarge regions. | |
4667 | ||
4668 | Each mapped region starts with a mmap_region structure, the user | |
4669 | area starts after that structure, aligned to MEM_ALIGN. | |
4670 | ||
4671 | +-----------------------+ | |
4672 | | struct mmap_info + | | |
4673 | | padding | | |
4674 | +-----------------------+ | |
4675 | | user data | | |
4676 | | | | |
4677 | | | | |
4678 | +-----------------------+ */ | |
4679 | ||
4680 | struct mmap_region | |
4681 | { | |
4682 | /* User-specified size. */ | |
4683 | size_t nbytes_specified; | |
177c0ea7 | 4684 | |
b86af064 GM |
4685 | /* Number of bytes mapped */ |
4686 | size_t nbytes_mapped; | |
4687 | ||
4688 | /* Pointer to the location holding the address of the memory | |
4689 | allocated with the mmap'd block. The variable actually points | |
4690 | after this structure. */ | |
261cb4bb | 4691 | void **var; |
b86af064 GM |
4692 | |
4693 | /* Next and previous in list of all mmap'd regions. */ | |
4694 | struct mmap_region *next, *prev; | |
4695 | }; | |
4696 | ||
4697 | /* Doubly-linked list of mmap'd regions. */ | |
4698 | ||
4699 | static struct mmap_region *mmap_regions; | |
4700 | ||
4701 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4702 | /dev/zero will be opened on it. */ | |
4703 | ||
4704 | static int mmap_fd; | |
4705 | ||
b86af064 GM |
4706 | /* Page size on this system. */ |
4707 | ||
4708 | static int mmap_page_size; | |
4709 | ||
cd1181db | 4710 | /* 1 means mmap has been initialized. */ |
b86af064 | 4711 | |
37ef52bb | 4712 | static bool mmap_initialized_p; |
b86af064 GM |
4713 | |
4714 | /* Value is X rounded up to the next multiple of N. */ | |
4715 | ||
4716 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4717 | ||
4718 | /* Size of mmap_region structure plus padding. */ | |
4719 | ||
4720 | #define MMAP_REGION_STRUCT_SIZE \ | |
4721 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4722 | ||
4723 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4724 | region, return a pointer to the start of the region. */ | |
4725 | ||
4726 | #define MMAP_REGION(P) \ | |
4727 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4728 | ||
4729 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4730 | to the start of the user-visible part of the region. */ | |
4731 | ||
4732 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4733 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4734 | |
4735 | #define MEM_ALIGN sizeof (double) | |
4736 | ||
7273faa1 DL |
4737 | /* Predicate returning true if part of the address range [START .. END] |
4738 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4739 | memory mapping. |
4740 | ||
da6062e6 | 4741 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4742 | something else. This can be overridden by system configuration |
4743 | files if system-specific means to determine this exists. */ | |
4744 | ||
4745 | #ifndef MMAP_ALLOCATED_P | |
4746 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4747 | #endif | |
4748 | ||
53964682 | 4749 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4750 | |
1dae0f0a AS |
4751 | static void |
4752 | mmap_init (void) | |
4753 | { | |
4754 | #if MAP_ANON == 0 | |
4755 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4756 | in a dumped Emacs. */ | |
4757 | if (mmap_fd <= 0) | |
4758 | { | |
4759 | /* No anonymous mmap -- we need the file descriptor. */ | |
406af475 | 4760 | mmap_fd = emacs_open ("/dev/zero", O_RDONLY, 0); |
1dae0f0a AS |
4761 | if (mmap_fd == -1) |
4762 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4763 | } | |
4764 | #endif /* MAP_ANON == 0 */ | |
4765 | ||
4766 | if (mmap_initialized_p) | |
4767 | return; | |
4768 | mmap_initialized_p = 1; | |
b86af064 | 4769 | |
1dae0f0a AS |
4770 | #if MAP_ANON != 0 |
4771 | mmap_fd = -1; | |
4772 | #endif | |
4773 | ||
4774 | mmap_page_size = getpagesize (); | |
4775 | } | |
b86af064 | 4776 | |
b86af064 | 4777 | /* Unmap a region. P is a pointer to the start of the user-araa of |
37ef52bb | 4778 | the region. */ |
b86af064 | 4779 | |
37ef52bb | 4780 | static void |
1dae0f0a | 4781 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4782 | { |
4783 | if (r->next) | |
4784 | r->next->prev = r->prev; | |
4785 | if (r->prev) | |
4786 | r->prev->next = r->next; | |
4787 | else | |
4788 | mmap_regions = r->next; | |
177c0ea7 | 4789 | |
261cb4bb | 4790 | if (munmap (r, r->nbytes_mapped) == -1) |
37ef52bb | 4791 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); |
b86af064 GM |
4792 | } |
4793 | ||
4794 | ||
4795 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
37ef52bb | 4796 | Value is true if successful. */ |
b86af064 | 4797 | |
37ef52bb | 4798 | static bool |
1dae0f0a | 4799 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4800 | { |
4801 | char *region_end = (char *) r + r->nbytes_mapped; | |
4802 | size_t nbytes; | |
37ef52bb | 4803 | bool success = 0; |
b86af064 GM |
4804 | |
4805 | if (npages < 0) | |
4806 | { | |
4807 | /* Unmap pages at the end of the region. */ | |
4808 | nbytes = - npages * mmap_page_size; | |
4809 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4810 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4811 | else | |
4812 | { | |
4813 | r->nbytes_mapped -= nbytes; | |
4814 | success = 1; | |
4815 | } | |
4816 | } | |
4817 | else if (npages > 0) | |
4818 | { | |
b86af064 | 4819 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4820 | |
b86af064 GM |
4821 | /* Try to map additional pages at the end of the region. We |
4822 | cannot do this if the address range is already occupied by | |
4823 | something else because mmap deletes any previous mapping. | |
4824 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4825 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4826 | { |
261cb4bb | 4827 | void *p; |
177c0ea7 | 4828 | |
b86af064 GM |
4829 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4830 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4831 | if (p == MAP_FAILED) | |
edaa9aed | 4832 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4833 | else if (p != region_end) |
b86af064 GM |
4834 | { |
4835 | /* Kernels are free to choose a different address. In | |
4836 | that case, unmap what we've mapped above; we have | |
4837 | no use for it. */ | |
4838 | if (munmap (p, nbytes) == -1) | |
4839 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4840 | } | |
4841 | else | |
4842 | { | |
4843 | r->nbytes_mapped += nbytes; | |
4844 | success = 1; | |
4845 | } | |
4846 | } | |
4847 | } | |
4848 | ||
4849 | return success; | |
4850 | } | |
4851 | ||
4852 | ||
b86af064 GM |
4853 | /* Allocate a block of storage large enough to hold NBYTES bytes of |
4854 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4855 | address of some variable which will use the data area. | |
4856 | ||
4857 | The allocation of 0 bytes is valid. | |
4858 | ||
4859 | If we can't allocate the necessary memory, set *VAR to null, and | |
4860 | return null. */ | |
4861 | ||
261cb4bb PE |
4862 | static void * |
4863 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4864 | { |
4865 | void *p; | |
4866 | size_t map; | |
4867 | ||
4868 | mmap_init (); | |
4869 | ||
4870 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4871 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4872 | mmap_fd, 0); | |
177c0ea7 | 4873 | |
b86af064 GM |
4874 | if (p == MAP_FAILED) |
4875 | { | |
4876 | if (errno != ENOMEM) | |
4877 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4878 | p = NULL; | |
4879 | } | |
4880 | else | |
4881 | { | |
7d652d97 | 4882 | struct mmap_region *r = p; |
177c0ea7 | 4883 | |
b86af064 GM |
4884 | r->nbytes_specified = nbytes; |
4885 | r->nbytes_mapped = map; | |
4886 | r->var = var; | |
4887 | r->prev = NULL; | |
4888 | r->next = mmap_regions; | |
4889 | if (r->next) | |
4890 | r->next->prev = r; | |
4891 | mmap_regions = r; | |
177c0ea7 | 4892 | |
b86af064 GM |
4893 | p = MMAP_USER_AREA (p); |
4894 | } | |
177c0ea7 | 4895 | |
b86af064 GM |
4896 | return *var = p; |
4897 | } | |
4898 | ||
4899 | ||
1dae0f0a AS |
4900 | /* Free a block of relocatable storage whose data is pointed to by |
4901 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4902 | ||
4903 | static void | |
261cb4bb | 4904 | mmap_free (void **var) |
1dae0f0a AS |
4905 | { |
4906 | mmap_init (); | |
4907 | ||
4908 | if (*var) | |
4909 | { | |
4910 | mmap_free_1 (MMAP_REGION (*var)); | |
4911 | *var = NULL; | |
4912 | } | |
4913 | } | |
4914 | ||
4915 | ||
b86af064 GM |
4916 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4917 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4918 | and return this value. If more memory cannot be allocated, then | |
4919 | leave *VAR unchanged, and return null. */ | |
4920 | ||
261cb4bb PE |
4921 | static void * |
4922 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4923 | { |
261cb4bb | 4924 | void *result; |
177c0ea7 | 4925 | |
b86af064 GM |
4926 | mmap_init (); |
4927 | ||
4928 | if (*var == NULL) | |
4929 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4930 | else if (nbytes == 0) |
b86af064 GM |
4931 | { |
4932 | mmap_free (var); | |
4933 | result = mmap_alloc (var, nbytes); | |
4934 | } | |
4935 | else | |
4936 | { | |
4937 | struct mmap_region *r = MMAP_REGION (*var); | |
4938 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4939 | |
b86af064 GM |
4940 | if (room < nbytes) |
4941 | { | |
4942 | /* Must enlarge. */ | |
261cb4bb | 4943 | void *old_ptr = *var; |
b86af064 GM |
4944 | |
4945 | /* Try to map additional pages at the end of the region. | |
4946 | If that fails, allocate a new region, copy data | |
4947 | from the old region, then free it. */ | |
4948 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4949 | / mmap_page_size))) | |
4950 | { | |
4951 | r->nbytes_specified = nbytes; | |
4952 | *var = result = old_ptr; | |
4953 | } | |
4954 | else if (mmap_alloc (var, nbytes)) | |
4955 | { | |
72af86bd | 4956 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4957 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4958 | result = *var; | |
4959 | r = MMAP_REGION (result); | |
4960 | r->nbytes_specified = nbytes; | |
4961 | } | |
4962 | else | |
4963 | { | |
4964 | *var = old_ptr; | |
4965 | result = NULL; | |
4966 | } | |
4967 | } | |
4968 | else if (room - nbytes >= mmap_page_size) | |
4969 | { | |
4970 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4971 | memory back to the system. |
4972 | ||
4973 | The extra parens are to make the division happens first, | |
4974 | on positive values, so we know it will round towards | |
4975 | zero. */ | |
bb63c5c9 | 4976 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4977 | result = *var; |
4978 | r->nbytes_specified = nbytes; | |
4979 | } | |
4980 | else | |
4981 | { | |
4982 | /* Leave it alone. */ | |
4983 | result = *var; | |
4984 | r->nbytes_specified = nbytes; | |
4985 | } | |
4986 | } | |
4987 | ||
4988 | return result; | |
4989 | } | |
4990 | ||
4991 | ||
b86af064 GM |
4992 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4993 | ||
4994 | ||
4995 | \f | |
4996 | /*********************************************************************** | |
4997 | Buffer-text Allocation | |
4998 | ***********************************************************************/ | |
4999 | ||
b86af064 GM |
5000 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
5001 | ||
5002 | static void | |
fd05c7e9 | 5003 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 5004 | { |
261cb4bb | 5005 | void *p; |
177c0ea7 | 5006 | |
4d7e6e51 | 5007 | block_input (); |
b86af064 | 5008 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5009 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5010 | #elif defined REL_ALLOC |
261cb4bb | 5011 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5012 | #else |
815add84 | 5013 | p = xmalloc (nbytes); |
b86af064 | 5014 | #endif |
177c0ea7 | 5015 | |
b86af064 GM |
5016 | if (p == NULL) |
5017 | { | |
4d7e6e51 | 5018 | unblock_input (); |
531b0165 | 5019 | memory_full (nbytes); |
b86af064 GM |
5020 | } |
5021 | ||
7d652d97 | 5022 | b->text->beg = p; |
4d7e6e51 | 5023 | unblock_input (); |
b86af064 GM |
5024 | } |
5025 | ||
5026 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5027 | shrink it. */ | |
5028 | ||
5029 | void | |
d311d28c | 5030 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 5031 | { |
261cb4bb | 5032 | void *p; |
fd05c7e9 PE |
5033 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
5034 | + delta); | |
4d7e6e51 | 5035 | block_input (); |
b86af064 | 5036 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5037 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5038 | #elif defined REL_ALLOC |
261cb4bb | 5039 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
5040 | #else |
5041 | p = xrealloc (b->text->beg, nbytes); | |
5042 | #endif | |
177c0ea7 | 5043 | |
b86af064 GM |
5044 | if (p == NULL) |
5045 | { | |
4d7e6e51 | 5046 | unblock_input (); |
531b0165 | 5047 | memory_full (nbytes); |
b86af064 GM |
5048 | } |
5049 | ||
7d652d97 | 5050 | BUF_BEG_ADDR (b) = p; |
4d7e6e51 | 5051 | unblock_input (); |
b86af064 GM |
5052 | } |
5053 | ||
5054 | ||
5055 | /* Free buffer B's text buffer. */ | |
5056 | ||
5057 | static void | |
d3da34e0 | 5058 | free_buffer_text (struct buffer *b) |
b86af064 | 5059 | { |
4d7e6e51 | 5060 | block_input (); |
b86af064 GM |
5061 | |
5062 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5063 | mmap_free ((void **) &b->text->beg); |
b86af064 | 5064 | #elif defined REL_ALLOC |
261cb4bb | 5065 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
5066 | #else |
5067 | xfree (b->text->beg); | |
5068 | #endif | |
177c0ea7 | 5069 | |
b86af064 | 5070 | BUF_BEG_ADDR (b) = NULL; |
4d7e6e51 | 5071 | unblock_input (); |
b86af064 GM |
5072 | } |
5073 | ||
5074 | ||
5075 | \f | |
5076 | /*********************************************************************** | |
5077 | Initialization | |
5078 | ***********************************************************************/ | |
5079 | ||
dfcf069d | 5080 | void |
d3da34e0 | 5081 | init_buffer_once (void) |
1ab256cb | 5082 | { |
7c02e886 GM |
5083 | int idx; |
5084 | ||
72af86bd | 5085 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 5086 | |
1ab256cb RM |
5087 | /* Make sure all markable slots in buffer_defaults |
5088 | are initialized reasonably, so mark_buffer won't choke. */ | |
5089 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 5090 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 5091 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 5092 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 5093 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5094 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5095 | /* Prevent GC from getting confused. */ |
5096 | buffer_defaults.text = &buffer_defaults.own_text; | |
5097 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
5098 | /* No one will share the text with these buffers, but let's play it safe. */ |
5099 | buffer_defaults.indirections = 0; | |
5100 | buffer_local_symbols.indirections = 0; | |
98a07056 DA |
5101 | /* Likewise no one will display them. */ |
5102 | buffer_defaults.window_count = 0; | |
5103 | buffer_local_symbols.window_count = 0; | |
0c94c8d6 PE |
5104 | set_buffer_intervals (&buffer_defaults, NULL); |
5105 | set_buffer_intervals (&buffer_local_symbols, NULL); | |
c752cfa9 DA |
5106 | /* This is not strictly necessary, but let's make them initialized. */ |
5107 | bset_name (&buffer_defaults, build_pure_c_string (" *buffer-defaults*")); | |
5108 | bset_name (&buffer_local_symbols, build_pure_c_string (" *buffer-local-symbols*")); | |
914adc42 DA |
5109 | BUFFER_PVEC_INIT (&buffer_defaults); |
5110 | BUFFER_PVEC_INIT (&buffer_local_symbols); | |
1ab256cb RM |
5111 | |
5112 | /* Set up the default values of various buffer slots. */ | |
5113 | /* Must do these before making the first buffer! */ | |
5114 | ||
f532dca0 | 5115 | /* real setup is done in bindings.el */ |
39eb03f1 PE |
5116 | bset_mode_line_format (&buffer_defaults, build_pure_c_string ("%-")); |
5117 | bset_header_line_format (&buffer_defaults, Qnil); | |
5118 | bset_abbrev_mode (&buffer_defaults, Qnil); | |
5119 | bset_overwrite_mode (&buffer_defaults, Qnil); | |
5120 | bset_case_fold_search (&buffer_defaults, Qt); | |
5121 | bset_auto_fill_function (&buffer_defaults, Qnil); | |
5122 | bset_selective_display (&buffer_defaults, Qnil); | |
5123 | bset_selective_display_ellipses (&buffer_defaults, Qt); | |
5124 | bset_abbrev_table (&buffer_defaults, Qnil); | |
5125 | bset_display_table (&buffer_defaults, Qnil); | |
5126 | bset_undo_list (&buffer_defaults, Qnil); | |
5127 | bset_mark_active (&buffer_defaults, Qnil); | |
5128 | bset_file_format (&buffer_defaults, Qnil); | |
5129 | bset_auto_save_file_format (&buffer_defaults, Qt); | |
0c94c8d6 PE |
5130 | set_buffer_overlays_before (&buffer_defaults, NULL); |
5131 | set_buffer_overlays_after (&buffer_defaults, NULL); | |
c2d5b10f | 5132 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5133 | |
4b4deea2 | 5134 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
39eb03f1 PE |
5135 | bset_truncate_lines (&buffer_defaults, Qnil); |
5136 | bset_word_wrap (&buffer_defaults, Qnil); | |
5137 | bset_ctl_arrow (&buffer_defaults, Qt); | |
5138 | bset_bidi_display_reordering (&buffer_defaults, Qt); | |
5139 | bset_bidi_paragraph_direction (&buffer_defaults, Qnil); | |
5140 | bset_cursor_type (&buffer_defaults, Qt); | |
5141 | bset_extra_line_spacing (&buffer_defaults, Qnil); | |
5142 | bset_cursor_in_non_selected_windows (&buffer_defaults, Qt); | |
5143 | ||
5144 | bset_enable_multibyte_characters (&buffer_defaults, Qt); | |
5145 | bset_buffer_file_coding_system (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5146 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); |
5147 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
080db47f | 5148 | bset_cache_long_scans (&buffer_defaults, Qt); |
39eb03f1 | 5149 | bset_file_truename (&buffer_defaults, Qnil); |
4b4deea2 TT |
5150 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); |
5151 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5152 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
39eb03f1 PE |
5153 | bset_left_fringe_width (&buffer_defaults, Qnil); |
5154 | bset_right_fringe_width (&buffer_defaults, Qnil); | |
5155 | bset_fringes_outside_margins (&buffer_defaults, Qnil); | |
5156 | bset_scroll_bar_width (&buffer_defaults, Qnil); | |
5157 | bset_vertical_scroll_bar_type (&buffer_defaults, Qt); | |
5158 | bset_indicate_empty_lines (&buffer_defaults, Qnil); | |
5159 | bset_indicate_buffer_boundaries (&buffer_defaults, Qnil); | |
5160 | bset_fringe_indicator_alist (&buffer_defaults, Qnil); | |
5161 | bset_fringe_cursor_alist (&buffer_defaults, Qnil); | |
5162 | bset_scroll_up_aggressively (&buffer_defaults, Qnil); | |
5163 | bset_scroll_down_aggressively (&buffer_defaults, Qnil); | |
5164 | bset_display_time (&buffer_defaults, Qnil); | |
1ab256cb RM |
5165 | |
5166 | /* Assign the local-flags to the slots that have default values. | |
5167 | The local flag is a bit that is used in the buffer | |
5168 | to say that it has its own local value for the slot. | |
5169 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5170 | ||
5171 | /* Nothing can work if this isn't true */ | |
663e2b3f | 5172 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
5173 | |
5174 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5175 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
39eb03f1 PE |
5176 | bset_filename (&buffer_local_flags, make_number (-1)); |
5177 | bset_directory (&buffer_local_flags, make_number (-1)); | |
5178 | bset_backed_up (&buffer_local_flags, make_number (-1)); | |
5179 | bset_save_length (&buffer_local_flags, make_number (-1)); | |
5180 | bset_auto_save_file_name (&buffer_local_flags, make_number (-1)); | |
5181 | bset_read_only (&buffer_local_flags, make_number (-1)); | |
5182 | bset_major_mode (&buffer_local_flags, make_number (-1)); | |
5183 | bset_mode_name (&buffer_local_flags, make_number (-1)); | |
5184 | bset_undo_list (&buffer_local_flags, make_number (-1)); | |
5185 | bset_mark_active (&buffer_local_flags, make_number (-1)); | |
5186 | bset_point_before_scroll (&buffer_local_flags, make_number (-1)); | |
5187 | bset_file_truename (&buffer_local_flags, make_number (-1)); | |
5188 | bset_invisibility_spec (&buffer_local_flags, make_number (-1)); | |
5189 | bset_file_format (&buffer_local_flags, make_number (-1)); | |
5190 | bset_auto_save_file_format (&buffer_local_flags, make_number (-1)); | |
5191 | bset_display_count (&buffer_local_flags, make_number (-1)); | |
5192 | bset_display_time (&buffer_local_flags, make_number (-1)); | |
5193 | bset_enable_multibyte_characters (&buffer_local_flags, make_number (-1)); | |
8d7a4592 | 5194 | |
7c02e886 | 5195 | idx = 1; |
4b4deea2 TT |
5196 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5197 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5198 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5199 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5200 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5201 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5202 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5203 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5204 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5205 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5206 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5207 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5208 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5209 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5210 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 | 5211 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
e30b79c1 | 5212 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_scans), idx); ++idx; |
4b4deea2 TT |
5213 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; |
5214 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5215 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5216 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5217 | /* Make this one a permanent local. */ |
7c02e886 | 5218 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5219 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5220 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5221 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5222 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5223 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5224 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5225 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5226 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5227 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5228 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5229 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5230 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5231 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5232 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5233 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5234 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5235 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5236 | |
5237 | /* Need more room? */ | |
7313acd0 | 5238 | if (idx >= MAX_PER_BUFFER_VARS) |
1088b922 | 5239 | emacs_abort (); |
7313acd0 | 5240 | last_per_buffer_idx = idx; |
177c0ea7 | 5241 | |
1ab256cb RM |
5242 | Vbuffer_alist = Qnil; |
5243 | current_buffer = 0; | |
5244 | all_buffers = 0; | |
5245 | ||
2a0213a6 | 5246 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5247 | |
d67b4f80 | 5248 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
39eb03f1 | 5249 | bset_major_mode (&buffer_defaults, Qfundamental_mode); |
1ab256cb | 5250 | |
d67b4f80 | 5251 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5252 | |
d67b4f80 | 5253 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5254 | |
d67b4f80 | 5255 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5256 | |
d67b4f80 | 5257 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5258 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5259 | |
1ab256cb | 5260 | /* super-magic invisible buffer */ |
2a0213a6 | 5261 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5262 | Vbuffer_alist = Qnil; |
5263 | ||
2a0213a6 | 5264 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5265 | |
5266 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5267 | } |
5268 | ||
dfcf069d | 5269 | void |
0bbb27fc | 5270 | init_buffer (int initialized) |
1ab256cb | 5271 | { |
2381d133 | 5272 | char *pwd; |
136351b7 | 5273 | Lisp_Object temp; |
965d34eb | 5274 | ptrdiff_t len; |
1ab256cb | 5275 | |
b86af064 | 5276 | #ifdef USE_MMAP_FOR_BUFFERS |
0bbb27fc EZ |
5277 | if (initialized) |
5278 | { | |
5279 | struct buffer *b; | |
f63fc858 | 5280 | |
0bbb27fc EZ |
5281 | #ifndef WINDOWSNT |
5282 | /* These must be reset in the dumped Emacs, to avoid stale | |
5283 | references to mmap'ed memory from before the dump. | |
5284 | ||
5285 | WINDOWSNT doesn't need this because it doesn't track mmap'ed | |
5286 | regions by hand (see w32heap.c, which uses system APIs for | |
5287 | that purpose), and thus doesn't use mmap_regions. */ | |
5288 | mmap_regions = NULL; | |
5289 | mmap_fd = -1; | |
5290 | #endif | |
5291 | ||
5292 | /* The dumped buffers reference addresses of buffer text | |
5293 | recorded by temacs, that cannot be used by the dumped Emacs. | |
5294 | We map new memory for their text here. | |
5295 | ||
5296 | Implementation note: the buffers we carry from temacs are: | |
5297 | " prin1", "*scratch*", " *Minibuf-0*", "*Messages*", and | |
5298 | " *code-conversion-work*". They are created by | |
5299 | init_buffer_once and init_window_once (which are not called | |
5300 | in the dumped Emacs), and by the first call to coding.c routines. */ | |
5301 | FOR_EACH_BUFFER (b) | |
5302 | { | |
5303 | b->text->beg = NULL; | |
5304 | enlarge_buffer_text (b, 0); | |
5305 | } | |
5306 | } | |
5307 | else | |
5308 | { | |
5309 | struct buffer *b; | |
5310 | ||
5311 | /* Only buffers with allocated buffer text should be present at | |
5312 | this point in temacs. */ | |
5313 | FOR_EACH_BUFFER (b) | |
5314 | { | |
5315 | eassert (b->text->beg != NULL); | |
5316 | } | |
5317 | } | |
5318 | #else /* not USE_MMAP_FOR_BUFFERS */ | |
5319 | /* Avoid compiler warnings. */ | |
5320 | initialized = initialized; | |
b86af064 | 5321 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5322 | |
1ab256cb | 5323 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5324 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5325 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5326 | |
01537133 | 5327 | pwd = get_current_dir_name (); |
a17b5ed1 | 5328 | |
156bdb41 | 5329 | if (!pwd) |
a17b5ed1 | 5330 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5331 | |
1ab256cb RM |
5332 | /* Maybe this should really use some standard subroutine |
5333 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5334 | len = strlen (pwd); |
5335 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5336 | { |
156bdb41 | 5337 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5338 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5339 | if (!pwd) |
5340 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5341 | pwd[len] = DIRECTORY_SEP; |
5342 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5343 | len++; |
f7975d07 | 5344 | } |
0995fa35 | 5345 | |
d0065ff1 EZ |
5346 | /* At this moment, we still don't know how to decode the directory |
5347 | name. So, we keep the bytes in unibyte form so that file I/O | |
5348 | routines correctly get the original bytes. */ | |
39eb03f1 | 5349 | bset_directory (current_buffer, make_unibyte_string (pwd, len)); |
136351b7 | 5350 | |
0995fa35 RS |
5351 | /* Add /: to the front of the name |
5352 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5353 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5354 | if (! NILP (temp) |
5355 | /* If the default dir is just /, TEMP is non-nil | |
5356 | because of the ange-ftp completion handler. | |
5357 | However, it is not necessary to turn / into /:/. | |
5358 | So avoid doing that. */ | |
4b4deea2 | 5359 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
39eb03f1 PE |
5360 | bset_directory |
5361 | (current_buffer, | |
5362 | concat2 (build_string ("/:"), BVAR (current_buffer, directory))); | |
0995fa35 | 5363 | |
136351b7 | 5364 | temp = get_minibuffer (0); |
39eb03f1 | 5365 | bset_directory (XBUFFER (temp), BVAR (current_buffer, directory)); |
01537133 EZ |
5366 | |
5367 | free (pwd); | |
1ab256cb RM |
5368 | } |
5369 | ||
58cc0a01 DA |
5370 | /* Similar to defvar_lisp but define a variable whose value is the |
5371 | Lisp_Object stored in the current buffer. LNAME is the Lisp-level | |
5372 | variable name. VNAME is the name of the buffer slot. PREDICATE | |
5373 | is nil for a general Lisp variable. If PREDICATE is non-nil, then | |
5374 | only Lisp values that satisfies the PREDICATE are allowed (except | |
5375 | that nil is allowed too). DOC is a dummy where you write the doc | |
5376 | string as a comment. */ | |
5377 | ||
5378 | #define DEFVAR_PER_BUFFER(lname, vname, predicate, doc) \ | |
5379 | do { \ | |
5380 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5381 | defvar_per_buffer (&bo_fwd, lname, vname, predicate); \ | |
ce5b453a | 5382 | } while (0) |
d6aa1876 SM |
5383 | |
5384 | static void | |
8ea90aa3 | 5385 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
58cc0a01 | 5386 | Lisp_Object *address, Lisp_Object predicate) |
d6aa1876 | 5387 | { |
ce5b453a | 5388 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5389 | int offset; |
5390 | ||
ce5b453a | 5391 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5392 | offset = (char *)address - (char *)current_buffer; |
5393 | ||
ce5b453a SM |
5394 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5395 | bo_fwd->offset = offset; | |
58cc0a01 | 5396 | bo_fwd->predicate = predicate; |
b9598260 | 5397 | sym->declared_special = 1; |
ce5b453a | 5398 | sym->redirect = SYMBOL_FORWARDED; |
7d652d97 | 5399 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *) bo_fwd); |
ce5b453a | 5400 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); |
d6aa1876 SM |
5401 | |
5402 | if (PER_BUFFER_IDX (offset) == 0) | |
5403 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
ecda65d4 | 5404 | slot of buffer_local_flags. */ |
1088b922 | 5405 | emacs_abort (); |
d6aa1876 SM |
5406 | } |
5407 | ||
5408 | ||
ecda65d4 | 5409 | /* Initialize the buffer routines. */ |
dfcf069d | 5410 | void |
d3da34e0 | 5411 | syms_of_buffer (void) |
1ab256cb | 5412 | { |
9115729e KH |
5413 | staticpro (&last_overlay_modification_hooks); |
5414 | last_overlay_modification_hooks | |
5415 | = Fmake_vector (make_number (10), Qnil); | |
5416 | ||
1ab256cb RM |
5417 | staticpro (&Qfundamental_mode); |
5418 | staticpro (&Qmode_class); | |
5419 | staticpro (&QSFundamental); | |
5420 | staticpro (&Vbuffer_alist); | |
5421 | staticpro (&Qprotected_field); | |
5422 | staticpro (&Qpermanent_local); | |
5423 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5424 | |
5425 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5426 | DEFSYM (Qoverlayp, "overlayp"); | |
5427 | DEFSYM (Qevaporate, "evaporate"); | |
5428 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5429 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5430 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5431 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5432 | DEFSYM (Qpriority, "priority"); | |
5433 | DEFSYM (Qbefore_string, "before-string"); | |
5434 | DEFSYM (Qafter_string, "after-string"); | |
5435 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5436 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5437 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5438 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5439 | ||
1ab256cb | 5440 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5441 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5442 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5443 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5444 | |
422745d0 TT |
5445 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5446 | mode_line_format, | |
5447 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5448 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5449 | |
422745d0 TT |
5450 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5451 | header_line_format, | |
5452 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5453 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5454 | |
422745d0 TT |
5455 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5456 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5457 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5458 | |
422745d0 TT |
5459 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5460 | extra_line_spacing, | |
5461 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5462 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5463 | |
422745d0 TT |
5464 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5465 | cursor_in_non_selected_windows, | |
5466 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5467 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5468 | ||
422745d0 TT |
5469 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5470 | abbrev_mode, | |
5471 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5472 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5473 | |
422745d0 TT |
5474 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5475 | ctl_arrow, | |
5476 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5477 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5478 | |
422745d0 TT |
5479 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5480 | enable_multibyte_characters, | |
fb7ada5f | 5481 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5482 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5483 | |
422745d0 TT |
5484 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5485 | buffer_file_coding_system, | |
5486 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5487 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5488 | |
422745d0 TT |
5489 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5490 | truncate_lines, | |
5491 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5492 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5493 | |
422745d0 TT |
5494 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5495 | fill_column, | |
5496 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5497 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5498 | |
422745d0 TT |
5499 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5500 | left_margin, | |
5501 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5502 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5503 | |
422745d0 TT |
5504 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5505 | tab_width, | |
5506 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
276e8873 SM |
5507 | NOTE: This controls the display width of a TAB character, and not |
5508 | the size of an indentation step. | |
018ba359 | 5509 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5510 | |
422745d0 TT |
5511 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5512 | case_fold_search, | |
5513 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5514 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5515 | |
422745d0 TT |
5516 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5517 | left_margin_cols, | |
5518 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5519 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5520 | |
422745d0 TT |
5521 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5522 | right_margin_cols, | |
5523 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5524 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5525 | |
422745d0 TT |
5526 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5527 | left_fringe_width, | |
5528 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5529 | This is the same as (default-value 'left-fringe-width). */); |
5530 | ||
422745d0 TT |
5531 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5532 | right_fringe_width, | |
5533 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5534 | This is the same as (default-value 'right-fringe-width). */); |
5535 | ||
422745d0 TT |
5536 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5537 | fringes_outside_margins, | |
5538 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5539 | This is the same as (default-value 'fringes-outside-margins). */); |
5540 | ||
422745d0 TT |
5541 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5542 | scroll_bar_width, | |
5543 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5544 | This is the same as (default-value 'scroll-bar-width). */); |
5545 | ||
422745d0 TT |
5546 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5547 | vertical_scroll_bar_type, | |
5548 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5549 | This is the same as (default-value 'vertical-scroll-bar). */); |
5550 | ||
422745d0 TT |
5551 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5552 | indicate_empty_lines, | |
5553 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5554 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5555 | |
422745d0 TT |
5556 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5557 | indicate_buffer_boundaries, | |
5558 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5559 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5560 | ||
422745d0 TT |
5561 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5562 | fringe_indicator_alist, | |
5563 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5564 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5565 | ||
422745d0 TT |
5566 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5567 | fringe_cursor_alist, | |
5568 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5569 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5570 | ||
422745d0 TT |
5571 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5572 | scroll_up_aggressively, | |
5573 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5574 | This value applies in buffers that don't have their own local values. |
fc961256 | 5575 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5576 | |
422745d0 TT |
5577 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5578 | scroll_down_aggressively, | |
5579 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5580 | This value applies in buffers that don't have their own local values. |
fc961256 | 5581 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5582 | |
045dee35 | 5583 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5584 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5585 | Qnil, |
7614d762 RS |
5586 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5587 | The header line appears, optionally, at the top of a window; | |
5588 | the mode line appears at the bottom. */); | |
177c0ea7 | 5589 | |
4b4deea2 | 5590 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5591 | Qnil, |
5592 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5593 | |
5594 | The value may be nil, a string, a symbol or a list. | |
5595 | ||
018ba359 | 5596 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5597 | |
5598 | For any symbol other than t or nil, the symbol's value is processed as | |
5599 | a mode line construct. As a special exception, if that value is a | |
5600 | string, the string is processed verbatim, without handling any | |
5601 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5602 | `risky-local-variable' property, all properties in any strings, as | |
5603 | well as all :eval and :propertize forms in the value, are ignored. | |
5604 | ||
5605 | A list whose car is a string or list is processed by processing each | |
5606 | of the list elements recursively, as separate mode line constructs, | |
5607 | and concatenating the results. | |
5608 | ||
5609 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5610 | using the result as a mode line construct. Be careful--FORM should | |
5611 | not load any files, because that can cause an infinite recursion. | |
5612 | ||
5613 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5614 | processing ELT as the mode line construct, and adding the text | |
5615 | properties PROPS to the result. | |
5616 | ||
5617 | A list whose car is a symbol is processed by examining the symbol's | |
5618 | value, and, if that value is non-nil, processing the cadr of the list | |
5619 | recursively; and if that value is nil, processing the caddr of the | |
5620 | list recursively. | |
5621 | ||
5622 | A list whose car is an integer is processed by processing the cadr of | |
5623 | the list, and padding (if the number is positive) or truncating (if | |
5624 | negative) to the width specified by that number. | |
5625 | ||
018ba359 | 5626 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5627 | %b -- print buffer name. %f -- print visited file name. |
5628 | %F -- print frame name. | |
5629 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5630 | %& is like %*, but ignore read-only-ness. | |
5631 | % means buffer is read-only and * means it is modified. | |
5632 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5633 | %s -- print process status. %l -- print the current line number. | |
5634 | %c -- print the current column number (this makes editing slower). | |
5635 | To make the column number update correctly in all cases, | |
5636 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5637 | %i -- print the size of the buffer. |
5638 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5639 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5640 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5641 | or print Bottom or All. | |
018ba359 | 5642 | %n -- print Narrow if appropriate. |
dafbe726 | 5643 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5644 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5645 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5646 | %e -- print error message about full memory. |
f7165034 NR |
5647 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5648 | remote machine. | |
018ba359 PJ |
5649 | %[ -- print one [ for each recursive editing level. %] similar. |
5650 | %% -- print %. %- -- print infinitely many dashes. | |
5651 | Decimal digits after the % specify field width to which to pad. */); | |
5652 | ||
422745d0 | 5653 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5654 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5655 | |
4b4deea2 | 5656 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
58cc0a01 | 5657 | Qsymbolp, |
5a021dd0 GM |
5658 | doc: /* Symbol for current buffer's major mode. |
5659 | The default value (normally `fundamental-mode') affects new buffers. | |
5660 | A value of nil means to use the current buffer's major mode, provided | |
5661 | it is not marked as "special". | |
5662 | ||
5663 | When a mode is used by default, `find-file' switches to it before it | |
5664 | reads the contents into the buffer and before it finishes setting up | |
5665 | the buffer. Thus, the mode and its hooks should not expect certain | |
5666 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5667 | to be set up. */); | |
1ab256cb | 5668 | |
4b4deea2 | 5669 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5670 | Qnil, |
64a7c220 | 5671 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5672 | Usually a string, but can use any of the constructs for `mode-line-format', |
5673 | which see. | |
5674 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5675 | |
4b4deea2 | 5676 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5677 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5678 | ||
4b4deea2 | 5679 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5680 | doc: /* Non-nil if Abbrev mode is enabled. |
5681 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5682 | |
4b4deea2 | 5683 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5684 | Qnil, |
fb7ada5f | 5685 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5686 | |
4b4deea2 | 5687 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
58cc0a01 | 5688 | Qintegerp, |
fb7ada5f | 5689 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5690 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5691 | |
4b4deea2 | 5692 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
58cc0a01 | 5693 | Qintegerp, |
fb7ada5f | 5694 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5695 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5696 | |
4b4deea2 | 5697 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
58cc0a01 | 5698 | Qintegerp, |
fb7ada5f | 5699 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
276e8873 SM |
5700 | NOTE: This controls the display width of a TAB character, and not |
5701 | the size of an indentation step. | |
fde4eb86 | 5702 | This should be an integer greater than zero. */); |
1ab256cb | 5703 | |
4b4deea2 | 5704 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5705 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5706 | A value of nil means use backslash and octal digits. |
5707 | This variable does not apply to characters whose display is specified | |
5708 | in the current display table (if there is one). */); | |
1ab256cb | 5709 | |
3b06f880 | 5710 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5711 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5712 | Qnil, |
efc7e75f | 5713 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5714 | Otherwise they are regarded as unibyte. This affects the display, |
5715 | file I/O and the behavior of various editing commands. | |
5716 | ||
5717 | This variable is buffer-local but you cannot set it directly; | |
5718 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5719 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5720 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5721 | |
c71b5d9b | 5722 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5723 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5724 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5725 | This variable applies to saving the buffer, and also to `write-region' |
5726 | and other functions that use `write-region'. | |
5727 | It does not apply to sending output to subprocesses, however. | |
5728 | ||
5729 | If this is nil, the buffer is saved without any code conversion | |
5730 | unless some coding system is specified in `file-coding-system-alist' | |
5731 | for the buffer file. | |
5732 | ||
31a6cb06 EZ |
5733 | If the text to be saved cannot be encoded as specified by this variable, |
5734 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5735 | ||
018ba359 PJ |
5736 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5737 | ||
5738 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5739 | |
f44e260c | 5740 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5741 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5742 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5743 | |
6c0cf218 | 5744 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5745 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5746 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5747 | |
b44d9321 EZ |
5748 | If this is nil (the default), the direction of each paragraph is |
5749 | determined by the first strong directional character of its text. | |
5750 | The values of `right-to-left' and `left-to-right' override that. | |
5751 | Any other value is treated as nil. | |
b4bf28b7 | 5752 | |
b44d9321 EZ |
5753 | This variable has no effect unless the buffer's value of |
5754 | \`bidi-display-reordering' is non-nil. */); | |
5755 | ||
4b4deea2 | 5756 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5757 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5758 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5759 | |
5760 | Note that this is overridden by the variable | |
5761 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5762 | and this buffer is not full-frame width. |
5763 | ||
5764 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5765 | |
4b4deea2 | 5766 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5767 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5768 | When word-wrapping is on, continuation lines are wrapped at the space |
5769 | or tab character nearest to the right window edge. | |
5770 | If nil, continuation lines are wrapped at the right screen edge. | |
5771 | ||
5772 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5773 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5774 | word-wrapping, you might want to reduce the value of | |
5775 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5776 | in narrower windows. |
5777 | ||
5778 | Instead of setting this variable directly, most users should use | |
5779 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5780 | to t, and additionally redefines simple editing commands to act on | |
5781 | visual lines rather than logical lines. See the documentation of | |
5782 | `visual-line-mode'. */); | |
0858cd02 | 5783 | |
4b4deea2 | 5784 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
58cc0a01 | 5785 | Qstringp, |
efc7e75f | 5786 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5787 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5788 | |
4b4deea2 | 5789 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5790 | Qnil, |
efc7e75f | 5791 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5792 | It is called after self-inserting any character specified in |
5793 | the `auto-fill-chars' table. | |
5794 | NOTE: This variable is not a hook; | |
5795 | its value may not be a list of functions. */); | |
1ab256cb | 5796 | |
4b4deea2 | 5797 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
58cc0a01 | 5798 | Qstringp, |
ecda65d4 SM |
5799 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. |
5800 | This should be an absolute file name. */); | |
1ab256cb | 5801 | |
4b4deea2 | 5802 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
58cc0a01 | 5803 | Qstringp, |
efc7e75f | 5804 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5805 | The truename of a file is calculated by `file-truename' |
5806 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5807 | |
1ab256cb | 5808 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5809 | &BVAR (current_buffer, auto_save_file_name), |
58cc0a01 | 5810 | Qstringp, |
7614d762 RS |
5811 | doc: /* Name of file for auto-saving current buffer. |
5812 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5813 | |
4b4deea2 | 5814 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5815 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5816 | |
4b4deea2 | 5817 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5818 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5819 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5820 | |
4b4deea2 | 5821 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
58cc0a01 | 5822 | Qintegerp, |
efc7e75f | 5823 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5824 | 0 initially. |
5825 | -1 means auto-saving turned off until next real save. | |
5826 | ||
5827 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5828 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5829 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5830 | |
4b4deea2 | 5831 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5832 | Qnil, |
7614d762 | 5833 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5834 | An integer N as value means display only lines |
5835 | that start with less than N columns of space. | |
7614d762 RS |
5836 | A value of t means that the character ^M makes itself and |
5837 | all the rest of the line invisible; also, when saving the buffer | |
5838 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5839 | |
1ab256cb | 5840 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5841 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5842 | Qnil, |
3f676284 | 5843 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5844 | |
4b4deea2 | 5845 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5846 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5847 | The value should be one of `overwrite-mode-textual', |
5848 | `overwrite-mode-binary', or nil. | |
5849 | If it is `overwrite-mode-textual', self-insertion still | |
5850 | inserts at the end of a line, and inserts when point is before a tab, | |
5851 | until the tab is filled in. | |
5852 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5853 | ||
4b4deea2 | 5854 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5855 | Qnil, |
efc7e75f | 5856 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5857 | |
5858 | If this variable is nil, the value of `standard-display-table' is used. | |
5859 | Each window can have its own, overriding display table, see | |
5860 | `set-window-display-table' and `window-display-table'. | |
5861 | ||
5862 | The display table is a char-table created with `make-display-table'. | |
5863 | A char-table is an array indexed by character codes. Normal array | |
5864 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5865 | ||
5866 | Each of the char-table elements control how to display the corresponding | |
5867 | text character: the element at index C in the table says how to display | |
5868 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5869 | characters or nil. The value nil means display the character in the |
5870 | default fashion; otherwise, the characters from the vector are delivered | |
5871 | to the screen instead of the original character. | |
018ba359 | 5872 | |
5fd11dc8 | 5873 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5874 | to display a capital Y instead of each X character. |
018ba359 PJ |
5875 | |
5876 | In addition, a char-table has six extra slots to control the display of: | |
5877 | ||
5878 | the end of a truncated screen line (extra-slot 0, a single character); | |
5879 | the end of a continued line (extra-slot 1, a single character); | |
5880 | the escape character used to display character codes in octal | |
5881 | (extra-slot 2, a single character); | |
5882 | the character used as an arrow for control characters (extra-slot 3, | |
5883 | a single character); | |
5884 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5885 | a vector of characters); | |
5886 | the character used to draw the border between side-by-side windows | |
5887 | (extra-slot 5, a single character). | |
5888 | ||
5889 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5890 | |
4b4deea2 | 5891 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
58cc0a01 | 5892 | Qintegerp, |
0df00f59 | 5893 | doc: /* Width in columns of left marginal area for display of a buffer. |
ddd6b685 EZ |
5894 | A value of nil means no marginal area. |
5895 | ||
5896 | Setting this variable does not take effect until a new buffer is displayed | |
5897 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
177c0ea7 | 5898 | |
4b4deea2 | 5899 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
58cc0a01 | 5900 | Qintegerp, |
0df00f59 | 5901 | doc: /* Width in columns of right marginal area for display of a buffer. |
ddd6b685 EZ |
5902 | A value of nil means no marginal area. |
5903 | ||
5904 | Setting this variable does not take effect until a new buffer is displayed | |
5905 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
177c0ea7 | 5906 | |
4b4deea2 | 5907 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
58cc0a01 | 5908 | Qintegerp, |
fb7ada5f | 5909 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a | 5910 | A value of 0 means no left fringe is shown in this buffer's window. |
ddd6b685 EZ |
5911 | A value of nil means to use the left fringe width from the window's frame. |
5912 | ||
5913 | Setting this variable does not take effect until a new buffer is displayed | |
5914 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
2ad8731a | 5915 | |
4b4deea2 | 5916 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
58cc0a01 | 5917 | Qintegerp, |
fb7ada5f | 5918 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a | 5919 | A value of 0 means no right fringe is shown in this buffer's window. |
ddd6b685 EZ |
5920 | A value of nil means to use the right fringe width from the window's frame. |
5921 | ||
5922 | Setting this variable does not take effect until a new buffer is displayed | |
5923 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
2ad8731a | 5924 | |
4b4deea2 | 5925 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5926 | Qnil, |
fb7ada5f | 5927 | doc: /* Non-nil means to display fringes outside display margins. |
ddd6b685 EZ |
5928 | A value of nil means to display fringes between margins and buffer text. |
5929 | ||
5930 | Setting this variable does not take effect until a new buffer is displayed | |
5931 | in a window. To make the change take effect, call `set-window-buffer'. */); | |
2ad8731a | 5932 | |
4b4deea2 | 5933 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
58cc0a01 | 5934 | Qintegerp, |
fb7ada5f | 5935 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5936 | A value of nil means to use the scroll bar width from the window's frame. */); |
5937 | ||
4b4deea2 | 5938 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5939 | Qnil, |
fb7ada5f | 5940 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5941 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5942 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5943 | |
fc2c8887 RS |
5944 | A value of `left' or `right' means put the vertical scroll bar at that side |
5945 | of the window; a value of nil means don't show any vertical scroll bars. | |
5946 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5947 | |
0552666b | 5948 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5949 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5950 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5951 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5952 | window-systems. */); | |
177c0ea7 | 5953 | |
6b61353c | 5954 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5955 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5956 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5957 | If non-nil, the first and last line of the buffer are marked in the fringe |
5958 | of a window on window-systems with angle bitmaps, or if the window can be | |
5959 | scrolled, the top and bottom line of the window are marked with up and down | |
5960 | arrow bitmaps. | |
b2229037 KS |
5961 | |
5962 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5963 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5964 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5965 | the left fringe but no arrows. |
b2229037 | 5966 | |
79e3497d RS |
5967 | You can exercise more precise control by using an alist as the |
5968 | value. Each alist element (INDICATOR . POSITION) specifies | |
5969 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5970 | `bottom', `up', `down', or t, which specifies the default position, |
5971 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5972 | this indicator. | |
5973 | ||
5974 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5975 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5976 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5977 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5978 | |
c6a46372 | 5979 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5980 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5981 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5982 | The value is an alist where each element (INDICATOR . BITMAPS) |
5983 | specifies the fringe bitmaps used to display a specific logical | |
5984 | fringe indicator. | |
5985 | ||
5986 | INDICATOR specifies the logical indicator type which is one of the | |
5987 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5988 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5989 | |
14fb5704 | 5990 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5991 | the actual bitmap shown in the left or right fringe for the logical |
5992 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5993 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5994 | are used only for the `bottom' and `top-bottom' indicators when the |
5995 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5996 | symbol which is used in both left and right fringes. */); |
5997 | ||
5998 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5999 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 6000 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
6001 | The value is an alist where each element (CURSOR . BITMAP) |
6002 | specifies the fringe bitmaps used to display a specific logical | |
6003 | cursor type in the fringe. | |
6004 | ||
6005 | CURSOR specifies the logical cursor type which is one of the following | |
6006 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
6007 | one is used to show a hollow cursor on narrow lines display lines | |
6008 | where the normal hollow cursor will not fit. | |
6009 | ||
6010 | BITMAP is the corresponding fringe bitmap shown for the logical | |
6011 | cursor type. */); | |
6012 | ||
0552666b | 6013 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
58cc0a01 | 6014 | &BVAR (current_buffer, scroll_up_aggressively), Qfloatp, |
4e0692c1 RS |
6015 | doc: /* How far to scroll windows upward. |
6016 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 6017 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6018 | means scroll to center point. A fraction means scroll to put point |
6019 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
6020 | When the value is 0.0, point goes at the bottom line, which in the |
6021 | simple case that you moved off with C-f means scrolling just one line. | |
6022 | 1.0 means point goes at the top, so that in that simple case, the | |
6023 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6024 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6025 | |
0552666b | 6026 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
58cc0a01 | 6027 | &BVAR (current_buffer, scroll_down_aggressively), Qfloatp, |
4e0692c1 RS |
6028 | doc: /* How far to scroll windows downward. |
6029 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 6030 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6031 | means scroll to center point. A fraction means scroll to put point |
6032 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6033 | When the value is 0.0, point goes at the top line, which in the |
6034 | simple case that you moved off with C-b means scrolling just one line. | |
6035 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6036 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6037 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6038 | |
29208e82 | 6039 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 6040 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
6041 | Two arguments are passed to each function: the positions of |
6042 | the beginning and end of the range of old text to be changed. | |
6043 | \(For an insertion, the beginning and end are at the same place.) | |
6044 | No information is given about the length of the text after the change. | |
6045 | ||
6046 | Buffer changes made while executing the `before-change-functions' | |
6047 | don't call any before-change or after-change functions. | |
7b2bf907 | 6048 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6049 | |
6050 | If an unhandled error happens in running these functions, | |
6051 | the variable's value remains nil. That prevents the error | |
6052 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6053 | Vbefore_change_functions = Qnil; |
6054 | ||
29208e82 | 6055 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 6056 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6057 | Three arguments are passed to each function: the positions of |
6058 | the beginning and end of the range of changed text, | |
6059 | and the length in bytes of the pre-change text replaced by that range. | |
6060 | \(For an insertion, the pre-change length is zero; | |
6061 | for a deletion, that length is the number of bytes deleted, | |
6062 | and the post-change beginning and end are at the same place.) | |
6063 | ||
6064 | Buffer changes made while executing the `after-change-functions' | |
6065 | don't call any before-change or after-change functions. | |
7b2bf907 | 6066 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6067 | |
6068 | If an unhandled error happens in running these functions, | |
6069 | the variable's value remains nil. That prevents the error | |
6070 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6071 | Vafter_change_functions = Qnil; |
6072 | ||
29208e82 | 6073 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 6074 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6075 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6076 | Vfirst_change_hook = Qnil; |
1ab256cb | 6077 | |
4b4deea2 | 6078 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 6079 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
6080 | Recent changes come first; older changes follow newer. |
6081 | ||
6082 | An entry (BEG . END) represents an insertion which begins at | |
6083 | position BEG and ends at position END. | |
6084 | ||
6085 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6086 | from (abs POSITION). If POSITION is positive, point was at the front | |
6087 | of the text being deleted; if negative, point was at the end. | |
6088 | ||
d35af63c PE |
6089 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
6090 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
6091 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
6092 | modification time of the most recent save is different, this entry is |
6093 | obsolete. | |
6094 | ||
954b166e PE |
6095 | An entry (t . 0) means means the buffer was previously unmodified but |
6096 | its time stamp was unknown because it was not associated with a file. | |
6097 | An entry (t . -1) is similar, except that it means the buffer's visited | |
6098 | file did not exist. | |
6099 | ||
018ba359 PJ |
6100 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property |
6101 | was modified between BEG and END. PROPERTY is the property name, | |
6102 | and VALUE is the old value. | |
6103 | ||
7405f386 KS |
6104 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6105 | \(apply FUN-NAME ARGS). | |
6106 | ||
6107 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6108 | in the active region. BEG and END is the range affected by this entry | |
70ff8240 | 6109 | and DELTA is the number of characters added or deleted in that range by |
7405f386 | 6110 | this change. |
c6c7dc03 | 6111 | |
018ba359 PJ |
6112 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6113 | was adjusted in position by the offset DISTANCE (an integer). | |
6114 | ||
6115 | An entry of the form POSITION indicates that point was at the buffer | |
6116 | location given by the integer. Undoing an entry of this form places | |
6117 | point at POSITION. | |
6118 | ||
b4c4f2f4 JB |
6119 | Entries with value `nil' mark undo boundaries. The undo command treats |
6120 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6121 | |
6122 | If the value of the variable is t, undo information is not recorded. */); | |
6123 | ||
4b4deea2 | 6124 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 6125 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 6126 | |
e30b79c1 DA |
6127 | DEFVAR_PER_BUFFER ("cache-long-scans", &BVAR (current_buffer, cache_long_scans), Qnil, |
6128 | doc: /* Non-nil means that Emacs should use caches in attempt to speedup buffer scans. | |
018ba359 | 6129 | |
314ffdb1 GM |
6130 | There is no reason to set this to nil except for debugging purposes. |
6131 | ||
018ba359 | 6132 | Normally, the line-motion functions work by scanning the buffer for |
5629f29b DK |
6133 | newlines. Columnar operations (like `move-to-column' and |
6134 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6135 | widths as they go. This works well for ordinary text, but if the |
6136 | buffer's lines are very long (say, more than 500 characters), these | |
6137 | motion functions will take longer to execute. Emacs may also take | |
6138 | longer to update the display. | |
6139 | ||
e30b79c1 | 6140 | If `cache-long-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6141 | results of their scans, and consult the cache to avoid rescanning |
6142 | regions of the buffer until the text is modified. The caches are most | |
6143 | beneficial when they prevent the most searching---that is, when the | |
6144 | buffer contains long lines and large regions of characters with the | |
6145 | same, fixed screen width. | |
6146 | ||
e30b79c1 | 6147 | When `cache-long-scans' is non-nil, processing short lines will |
018ba359 PJ |
6148 | become slightly slower (because of the overhead of consulting the |
6149 | cache), and the caches will use memory roughly proportional to the | |
6150 | number of newlines and characters whose screen width varies. | |
6151 | ||
e30b79c1 DA |
6152 | Bidirectional editing also requires buffer scans to find paragraph |
6153 | separators. If you have large paragraphs or no paragraph separators | |
6154 | at all, these scans may be slow. If `cache-long-scans' is non-nil, | |
6155 | results of these scans are cached. This doesn't help too much if | |
6156 | paragraphs are of the reasonable (few thousands of characters) size. | |
6157 | ||
018ba359 PJ |
6158 | The caches require no explicit maintenance; their accuracy is |
6159 | maintained internally by the Emacs primitives. Enabling or disabling | |
6160 | the cache should not affect the behavior of any of the motion | |
6161 | functions; it should only affect their performance. */); | |
6162 | ||
4b4deea2 | 6163 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 6164 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 6165 | |
4b4deea2 | 6166 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 6167 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 6168 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6169 | set when a file is visited. */); |
be9aafdd | 6170 | |
71ed49fa | 6171 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 6172 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 6173 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
6174 | Should be a list of symbols naming formats that are defined in `format-alist'. |
6175 | If it is t, which is the default, auto-save files are written in the | |
6176 | same format as a regular save would use. */); | |
6177 | ||
3cb719bd | 6178 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6179 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6180 | doc: /* Invisibility spec of this buffer. |
81bf5420 LI |
6181 | The default is t, which means that text is invisible if it has a non-nil |
6182 | `invisible' property. | |
6183 | This variable can also be a list. The list can have two kinds of elements: | |
6184 | `ATOM' and `(ATOM . ELLIPSIS)'. A text character is invisible if its | |
6185 | `invisible' property is `ATOM', or has an `invisible' property that is a list | |
6186 | that contains `ATOM'. | |
6187 | If the `(ATOM . ELLIPSIS)' form is used, and `ELLIPSIS' is non-nil, an | |
6188 | ellipsis will be displayed after the invisible characters. | |
6189 | Setting this variable is very fast, much faster than scanning all the text in | |
6190 | the buffer looking for properties to change. */); | |
3cb719bd | 6191 | |
7962a441 | 6192 | DEFVAR_PER_BUFFER ("buffer-display-count", |
58cc0a01 | 6193 | &BVAR (current_buffer, display_count), Qintegerp, |
7ee72033 | 6194 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6195 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6196 | |
6197 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6198 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6199 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6200 | The function `set-window-buffer' updates this variable |
6201 | to the value obtained by calling `current-time'. | |
6202 | If the buffer has never been shown in a window, the value is nil. */); | |
6203 | ||
29208e82 | 6204 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6205 | doc: /* Non-nil if Transient Mark mode is enabled. |
6206 | See the command `transient-mark-mode' for a description of this minor mode. | |
6207 | ||
6208 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6209 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6210 | all windows or just the selected window. | |
6211 | ||
f49d1f52 | 6212 | Lisp programs may give this variable certain special values: |
9d794026 | 6213 | |
f49d1f52 SM |
6214 | - A value of `lambda' enables Transient Mark mode temporarily. |
6215 | It is disabled again after any subsequent action that would | |
6216 | normally deactivate the mark (e.g. buffer modification). | |
6217 | ||
6218 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6219 | temporarily. After any subsequent point motion command that is | |
6220 | not shift-translated, or any other action that would normally | |
6221 | deactivate the mark (e.g. buffer modification), the value of | |
6222 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6223 | Vtransient_mark_mode = Qnil; |
6224 | ||
29208e82 | 6225 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 6226 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6227 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6228 | text properties. If the value is a list, disregard `buffer-read-only' | |
6229 | and disregard a `read-only' text property if the property value | |
6230 | is a member of the list. */); | |
a96b68f1 RS |
6231 | Vinhibit_read_only = Qnil; |
6232 | ||
4b4deea2 | 6233 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6234 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6235 | Values are interpreted as follows: |
6236 | ||
0f7b074f CY |
6237 | t use the cursor specified for the frame |
6238 | nil don't display a cursor | |
6239 | box display a filled box cursor | |
6240 | hollow display a hollow box cursor | |
6241 | bar display a vertical bar cursor with default width | |
6242 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6243 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6244 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
0f7b074f | 6245 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6246 | |
e08b1705 MR |
6247 | When the buffer is displayed in a non-selected window, the |
6248 | cursor's appearance is instead controlled by the variable | |
6249 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6250 | |
a3bbced0 | 6251 | DEFVAR_PER_BUFFER ("line-spacing", |
58cc0a01 | 6252 | &BVAR (current_buffer, extra_line_spacing), Qnumberp, |
7ee72033 | 6253 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6254 | The space is measured in pixels, and put below lines on graphic displays, |
6255 | see `display-graphic-p'. | |
60ebfdf3 | 6256 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6257 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6258 | |
0124c5bd | 6259 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6260 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6261 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6262 | If nil, only shows a cursor in the selected window. |
6263 | If t, displays a cursor related to the usual cursor type | |
6264 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6265 | You can also specify the cursor type as in the `cursor-type' variable. | |
6266 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6267 | |
29208e82 | 6268 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6269 | doc: /* List of functions called with no args to query before killing a buffer. |
6270 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6271 | |
6272 | If any of them returns nil, the buffer is not killed. Functions run by | |
6273 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6274 | Vkill_buffer_query_functions = Qnil; |
6275 | ||
29208e82 | 6276 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6277 | doc: /* Normal hook run before changing the major mode of a buffer. |
6278 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6279 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6280 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6281 | |
9397e56f MR |
6282 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6283 | doc: /* Hook run when the buffer list changes. | |
2c6053e8 | 6284 | Functions running this hook are, `get-buffer-create', |
9397e56f | 6285 | `make-indirect-buffer', `rename-buffer', `kill-buffer', |
2c6053e8 | 6286 | `bury-buffer-internal' and `select-window'. */); |
9397e56f | 6287 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6288 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6289 | |
0dc88e60 | 6290 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6291 | defsubr (&Sbuffer_list); |
6292 | defsubr (&Sget_buffer); | |
6293 | defsubr (&Sget_file_buffer); | |
6294 | defsubr (&Sget_buffer_create); | |
336cd056 | 6295 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6296 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6297 | defsubr (&Sbuffer_name); |
1ab256cb | 6298 | defsubr (&Sbuffer_file_name); |
336cd056 | 6299 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6300 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6301 | defsubr (&Sbuffer_local_variables); |
6302 | defsubr (&Sbuffer_modified_p); | |
ecda65d4 | 6303 | defsubr (&Sforce_mode_line_update); |
1ab256cb RM |
6304 | defsubr (&Sset_buffer_modified_p); |
6305 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6306 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6307 | defsubr (&Srename_buffer); |
6308 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6309 | defsubr (&Sbuffer_enable_undo); |
6310 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6311 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6312 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6313 | defsubr (&Scurrent_buffer); |
6314 | defsubr (&Sset_buffer); | |
6315 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6316 | defsubr (&Serase_buffer); |
13cda5f9 | 6317 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6318 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6319 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6320 | |
52f8ec73 | 6321 | defsubr (&Soverlayp); |
2eec3b4e RS |
6322 | defsubr (&Smake_overlay); |
6323 | defsubr (&Sdelete_overlay); | |
c5e28e39 | 6324 | defsubr (&Sdelete_all_overlays); |
2eec3b4e | 6325 | defsubr (&Smove_overlay); |
8ebafa8d JB |
6326 | defsubr (&Soverlay_start); |
6327 | defsubr (&Soverlay_end); | |
6328 | defsubr (&Soverlay_buffer); | |
6329 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6330 | defsubr (&Soverlays_at); |
74514898 | 6331 | defsubr (&Soverlays_in); |
2eec3b4e | 6332 | defsubr (&Snext_overlay_change); |
239c932b | 6333 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6334 | defsubr (&Soverlay_recenter); |
6335 | defsubr (&Soverlay_lists); | |
6336 | defsubr (&Soverlay_get); | |
6337 | defsubr (&Soverlay_put); | |
a8c21b48 | 6338 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6339 | } |
6340 | ||
dfcf069d | 6341 | void |
d3da34e0 | 6342 | keys_of_buffer (void) |
1ab256cb RM |
6343 | { |
6344 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6345 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6346 | |
6347 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6348 | initialized when that function gets called. */ | |
d67b4f80 | 6349 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6350 | } |