Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
4158c17d | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994 |
c922bc55 | 3 | Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
c922bc55 | 9 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
2381d133 JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
1ab256cb RM |
24 | #include <sys/param.h> |
25 | ||
26 | #ifndef MAXPATHLEN | |
27 | /* in 4.1, param.h fails to define this. */ | |
28 | #define MAXPATHLEN 1024 | |
29 | #endif /* not MAXPATHLEN */ | |
30 | ||
18160b98 | 31 | #include <config.h> |
1ab256cb | 32 | #include "lisp.h" |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
36 | #include "buffer.h" | |
28e969dd | 37 | #include "region-cache.h" |
1ab256cb | 38 | #include "indent.h" |
d014bf88 | 39 | #include "blockinput.h" |
1ab256cb RM |
40 | |
41 | struct buffer *current_buffer; /* the current buffer */ | |
42 | ||
43 | /* First buffer in chain of all buffers (in reverse order of creation). | |
44 | Threaded through ->next. */ | |
45 | ||
46 | struct buffer *all_buffers; | |
47 | ||
48 | /* This structure holds the default values of the buffer-local variables | |
49 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
50 | The default value occupies the same slot in this structure | |
51 | as an individual buffer's value occupies in that buffer. | |
52 | Setting the default value also goes through the alist of buffers | |
53 | and stores into each buffer that does not say it has a local value. */ | |
54 | ||
55 | struct buffer buffer_defaults; | |
56 | ||
57 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
58 | ||
59 | static Lisp_Object Vbuffer_defaults; | |
60 | ||
61 | /* This structure marks which slots in a buffer have corresponding | |
62 | default values in buffer_defaults. | |
63 | Each such slot has a nonzero value in this structure. | |
64 | The value has only one nonzero bit. | |
65 | ||
66 | When a buffer has its own local value for a slot, | |
67 | the bit for that slot (found in the same slot in this structure) | |
68 | is turned on in the buffer's local_var_flags slot. | |
69 | ||
70 | If a slot in this structure is -1, then even though there may | |
71 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
72 | and the corresponding slot in buffer_defaults is not used. | |
73 | ||
74 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
75 | but there is a default value which is copied into each buffer. | |
76 | ||
77 | If a slot in this structure is negative, then even though there may | |
78 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
79 | and the corresponding slot in buffer_defaults is not used. | |
80 | ||
81 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
82 | zero, that is a bug */ | |
83 | ||
84 | struct buffer buffer_local_flags; | |
85 | ||
86 | /* This structure holds the names of symbols whose values may be | |
87 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
88 | ||
89 | struct buffer buffer_local_symbols; | |
90 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
91 | static Lisp_Object Vbuffer_local_symbols; | |
92 | ||
0fa3ba92 JB |
93 | /* This structure holds the required types for the values in the |
94 | buffer-local slots. If a slot contains Qnil, then the | |
95 | corresponding buffer slot may contain a value of any type. If a | |
96 | slot contains an integer, then prospective values' tags must be | |
97 | equal to that integer. When a tag does not match, the function | |
98 | buffer_slot_type_mismatch will signal an error. */ | |
99 | struct buffer buffer_local_types; | |
100 | ||
1ab256cb | 101 | Lisp_Object Fset_buffer (); |
01050cb5 | 102 | void set_buffer_internal (); |
173f2a64 | 103 | static void call_overlay_mod_hooks (); |
1ab256cb RM |
104 | |
105 | /* Alist of all buffer names vs the buffers. */ | |
106 | /* This used to be a variable, but is no longer, | |
107 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
108 | Lisp_Object Vbuffer_alist; | |
109 | ||
110 | /* Functions to call before and after each text change. */ | |
111 | Lisp_Object Vbefore_change_function; | |
112 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
113 | Lisp_Object Vbefore_change_functions; |
114 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 115 | |
c48f61ef RS |
116 | Lisp_Object Vtransient_mark_mode; |
117 | ||
a96b68f1 RS |
118 | /* t means ignore all read-only text properties. |
119 | A list means ignore such a property if its value is a member of the list. | |
120 | Any non-nil value means ignore buffer-read-only. */ | |
121 | Lisp_Object Vinhibit_read_only; | |
122 | ||
dcdffbf6 RS |
123 | /* List of functions to call that can query about killing a buffer. |
124 | If any of these functions returns nil, we don't kill it. */ | |
125 | Lisp_Object Vkill_buffer_query_functions; | |
126 | ||
dbc4e1c1 JB |
127 | /* List of functions to call before changing an unmodified buffer. */ |
128 | Lisp_Object Vfirst_change_hook; | |
129 | Lisp_Object Qfirst_change_hook; | |
1ab256cb RM |
130 | |
131 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
132 | ||
133 | Lisp_Object Qprotected_field; | |
134 | ||
135 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
136 | ||
137 | Lisp_Object Qkill_buffer_hook; | |
138 | ||
5fe0b67e RS |
139 | Lisp_Object Qget_file_buffer; |
140 | ||
52f8ec73 JB |
141 | Lisp_Object Qoverlayp; |
142 | ||
9d7608b7 | 143 | Lisp_Object Qpriority, Qwindow, Qevaporate; |
5985d248 | 144 | |
294d215f RS |
145 | Lisp_Object Qmodification_hooks; |
146 | Lisp_Object Qinsert_in_front_hooks; | |
147 | Lisp_Object Qinsert_behind_hooks; | |
148 | ||
1ab256cb RM |
149 | /* For debugging; temporary. See set_buffer_internal. */ |
150 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
151 | ||
152 | nsberror (spec) | |
153 | Lisp_Object spec; | |
154 | { | |
a7a60ce9 | 155 | if (STRINGP (spec)) |
1ab256cb RM |
156 | error ("No buffer named %s", XSTRING (spec)->data); |
157 | error ("Invalid buffer argument"); | |
158 | } | |
159 | \f | |
160 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
161 | "Return a list of all existing live buffers.") | |
162 | () | |
163 | { | |
164 | return Fmapcar (Qcdr, Vbuffer_alist); | |
165 | } | |
166 | ||
04ae1b48 RS |
167 | /* Like Fassoc, but use Fstring_equal to compare |
168 | (which ignores text properties), | |
169 | and don't ever QUIT. */ | |
170 | ||
171 | static Lisp_Object | |
172 | assoc_ignore_text_properties (key, list) | |
173 | register Lisp_Object key; | |
174 | Lisp_Object list; | |
175 | { | |
176 | register Lisp_Object tail; | |
177 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
178 | { | |
179 | register Lisp_Object elt, tem; | |
180 | elt = Fcar (tail); | |
181 | tem = Fstring_equal (Fcar (elt), key); | |
182 | if (!NILP (tem)) | |
183 | return elt; | |
184 | } | |
185 | return Qnil; | |
186 | } | |
187 | ||
1ab256cb RM |
188 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
189 | "Return the buffer named NAME (a string).\n\ | |
190 | If there is no live buffer named NAME, return nil.\n\ | |
191 | NAME may also be a buffer; if so, the value is that buffer.") | |
192 | (name) | |
193 | register Lisp_Object name; | |
194 | { | |
a7a60ce9 | 195 | if (BUFFERP (name)) |
1ab256cb RM |
196 | return name; |
197 | CHECK_STRING (name, 0); | |
198 | ||
04ae1b48 | 199 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
200 | } |
201 | ||
202 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
203 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 204 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
205 | If there is no such live buffer, return nil.\n\ |
206 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
207 | (filename) |
208 | register Lisp_Object filename; | |
209 | { | |
210 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
211 | Lisp_Object handler; |
212 | ||
1ab256cb RM |
213 | CHECK_STRING (filename, 0); |
214 | filename = Fexpand_file_name (filename, Qnil); | |
215 | ||
5fe0b67e RS |
216 | /* If the file name has special constructs in it, |
217 | call the corresponding file handler. */ | |
a617e913 | 218 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
219 | if (!NILP (handler)) |
220 | return call2 (handler, Qget_file_buffer, filename); | |
221 | ||
1ab256cb RM |
222 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
223 | { | |
224 | buf = Fcdr (XCONS (tail)->car); | |
a7a60ce9 KH |
225 | if (!BUFFERP (buf)) continue; |
226 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 227 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 228 | if (!NILP (tem)) |
1ab256cb RM |
229 | return buf; |
230 | } | |
231 | return Qnil; | |
232 | } | |
233 | ||
234 | /* Incremented for each buffer created, to assign the buffer number. */ | |
235 | int buffer_count; | |
236 | ||
237 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
238 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
239 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 240 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
241 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
242 | The value is never nil.") | |
243 | (name) | |
244 | register Lisp_Object name; | |
245 | { | |
a9ee7a59 | 246 | register Lisp_Object buf; |
1ab256cb RM |
247 | register struct buffer *b; |
248 | ||
249 | buf = Fget_buffer (name); | |
265a9e55 | 250 | if (!NILP (buf)) |
1ab256cb RM |
251 | return buf; |
252 | ||
31cd83e9 KH |
253 | if (XSTRING (name)->size == 0) |
254 | error ("Empty string for buffer name is not allowed"); | |
255 | ||
9ac0d9e0 | 256 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb | 257 | |
336cd056 RS |
258 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
259 | ||
260 | /* An ordinary buffer uses its own struct buffer_text. */ | |
261 | b->text = &b->own_text; | |
262 | b->base_buffer = 0; | |
263 | ||
1ab256cb | 264 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 265 | BLOCK_INPUT; |
1ab256cb | 266 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 267 | UNBLOCK_INPUT; |
1ab256cb RM |
268 | if (! BUF_BEG_ADDR (b)) |
269 | memory_full (); | |
270 | ||
271 | BUF_PT (b) = 1; | |
272 | BUF_GPT (b) = 1; | |
273 | BUF_BEGV (b) = 1; | |
274 | BUF_ZV (b) = 1; | |
275 | BUF_Z (b) = 1; | |
276 | BUF_MODIFF (b) = 1; | |
336cd056 RS |
277 | BUF_SAVE_MODIFF (b) = 1; |
278 | BUF_INTERVALS (b) = 0; | |
1ab256cb | 279 | |
28e969dd JB |
280 | b->newline_cache = 0; |
281 | b->width_run_cache = 0; | |
282 | b->width_table = Qnil; | |
283 | ||
1ab256cb RM |
284 | /* Put this on the chain of all buffers including killed ones. */ |
285 | b->next = all_buffers; | |
286 | all_buffers = b; | |
287 | ||
336cd056 RS |
288 | /* An ordinary buffer normally doesn't need markers |
289 | to handle BEGV and ZV. */ | |
290 | b->pt_marker = Qnil; | |
291 | b->begv_marker = Qnil; | |
292 | b->zv_marker = Qnil; | |
04ae1b48 RS |
293 | |
294 | name = Fcopy_sequence (name); | |
295 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 296 | b->name = name; |
04ae1b48 | 297 | |
1ab256cb RM |
298 | if (XSTRING (name)->data[0] != ' ') |
299 | b->undo_list = Qnil; | |
300 | else | |
301 | b->undo_list = Qt; | |
302 | ||
303 | reset_buffer (b); | |
bcd40520 | 304 | reset_buffer_local_variables (b); |
1ab256cb RM |
305 | |
306 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 307 | XSETBUFFER (buf, b); |
1ab256cb RM |
308 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
309 | ||
310 | b->mark = Fmake_marker (); | |
336cd056 RS |
311 | BUF_MARKERS (b) = Qnil; |
312 | b->name = name; | |
313 | return buf; | |
314 | } | |
315 | ||
316 | DEFUN ("make-indirect-buffer", | |
317 | Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, | |
318 | "BMake indirect buffer: \nbIndirect to base buffer: ", | |
319 | "Create and return an indirect buffer named NAME, with base buffer BASE.\n\ | |
320 | BASE should be an existing buffer (or buffer name).") | |
321 | (name, base_buffer) | |
322 | register Lisp_Object name, base_buffer; | |
323 | { | |
324 | register Lisp_Object buf; | |
325 | register struct buffer *b; | |
326 | ||
327 | buf = Fget_buffer (name); | |
328 | if (!NILP (buf)) | |
329 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
330 | ||
331 | base_buffer = Fget_buffer (base_buffer); | |
332 | if (NILP (base_buffer)) | |
333 | error ("No such buffer: `%s'", | |
334 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
335 | ||
336 | if (XSTRING (name)->size == 0) | |
337 | error ("Empty string for buffer name is not allowed"); | |
338 | ||
339 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
340 | ||
341 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
342 | ||
343 | if (XBUFFER (base_buffer)->base_buffer) | |
344 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
345 | else | |
346 | b->base_buffer = XBUFFER (base_buffer); | |
347 | ||
348 | /* Use the base buffer's text object. */ | |
349 | b->text = b->base_buffer->text; | |
350 | ||
351 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
352 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
353 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
354 | ||
355 | b->newline_cache = 0; | |
356 | b->width_run_cache = 0; | |
357 | b->width_table = Qnil; | |
358 | ||
359 | /* Put this on the chain of all buffers including killed ones. */ | |
360 | b->next = all_buffers; | |
361 | all_buffers = b; | |
362 | ||
363 | name = Fcopy_sequence (name); | |
364 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
365 | b->name = name; | |
366 | ||
367 | reset_buffer (b); | |
368 | reset_buffer_local_variables (b); | |
369 | ||
370 | /* Put this in the alist of all live buffers. */ | |
371 | XSETBUFFER (buf, b); | |
372 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
373 | ||
374 | b->mark = Fmake_marker (); | |
1ab256cb | 375 | b->name = name; |
336cd056 RS |
376 | |
377 | /* Make sure the base buffer has markers for its narrowing. */ | |
378 | if (NILP (b->base_buffer->pt_marker)) | |
379 | { | |
380 | b->base_buffer->pt_marker = Fmake_marker (); | |
381 | Fset_marker (b->base_buffer->pt_marker, | |
382 | make_number (BUF_PT (b->base_buffer)), base_buffer); | |
383 | } | |
384 | if (NILP (b->base_buffer->begv_marker)) | |
385 | { | |
386 | b->base_buffer->begv_marker = Fmake_marker (); | |
387 | Fset_marker (b->base_buffer->begv_marker, | |
388 | make_number (BUF_BEGV (b->base_buffer)), base_buffer); | |
389 | } | |
390 | if (NILP (b->base_buffer->zv_marker)) | |
391 | { | |
392 | b->base_buffer->zv_marker = Fmake_marker (); | |
393 | Fset_marker (b->base_buffer->zv_marker, | |
394 | make_number (BUF_ZV (b->base_buffer)), base_buffer); | |
395 | } | |
396 | ||
397 | /* Give the indirect buffer markers for its narrowing. */ | |
398 | b->pt_marker = Fpoint_marker (); | |
399 | b->begv_marker = Fpoint_min_marker (); | |
400 | b->zv_marker = Fpoint_max_marker (); | |
401 | ||
a9ee7a59 | 402 | return buf; |
1ab256cb RM |
403 | } |
404 | ||
bcd40520 RS |
405 | /* Reinitialize everything about a buffer except its name and contents |
406 | and local variables. */ | |
1ab256cb RM |
407 | |
408 | void | |
409 | reset_buffer (b) | |
410 | register struct buffer *b; | |
411 | { | |
412 | b->filename = Qnil; | |
413 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; | |
414 | b->modtime = 0; | |
8d7a4592 | 415 | XSETFASTINT (b->save_length, 0); |
1ab256cb RM |
416 | b->last_window_start = 1; |
417 | b->backed_up = Qnil; | |
418 | b->auto_save_modified = 0; | |
84f6bcba | 419 | b->auto_save_failure_time = -1; |
1ab256cb RM |
420 | b->auto_save_file_name = Qnil; |
421 | b->read_only = Qnil; | |
2eec3b4e RS |
422 | b->overlays_before = Qnil; |
423 | b->overlays_after = Qnil; | |
8d7a4592 | 424 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 425 | b->mark_active = Qnil; |
1ab256cb RM |
426 | } |
427 | ||
bcd40520 RS |
428 | /* Reset buffer B's local variables info. |
429 | Don't use this on a buffer that has already been in use; | |
430 | it does not treat permanent locals consistently. | |
431 | Instead, use Fkill_all_local_variables. */ | |
432 | ||
c48f61ef | 433 | reset_buffer_local_variables (b) |
1ab256cb RM |
434 | register struct buffer *b; |
435 | { | |
436 | register int offset; | |
437 | ||
438 | /* Reset the major mode to Fundamental, together with all the | |
439 | things that depend on the major mode. | |
440 | default-major-mode is handled at a higher level. | |
441 | We ignore it here. */ | |
442 | b->major_mode = Qfundamental_mode; | |
443 | b->keymap = Qnil; | |
444 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
445 | b->mode_name = QSFundamental; | |
446 | b->minor_modes = Qnil; | |
447 | b->downcase_table = Vascii_downcase_table; | |
448 | b->upcase_table = Vascii_upcase_table; | |
e9edf33c RS |
449 | b->case_canon_table = Vascii_canon_table; |
450 | b->case_eqv_table = Vascii_eqv_table; | |
336cd056 | 451 | b->buffer_file_type = Qnil; |
1ab256cb RM |
452 | #if 0 |
453 | b->sort_table = XSTRING (Vascii_sort_table); | |
454 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
455 | #endif /* 0 */ | |
456 | ||
457 | /* Reset all per-buffer variables to their defaults. */ | |
458 | b->local_var_alist = Qnil; | |
459 | b->local_var_flags = 0; | |
460 | ||
461 | /* For each slot that has a default value, | |
462 | copy that into the slot. */ | |
463 | ||
464 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
465 | offset < sizeof (struct buffer); | |
4d2f1389 | 466 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
467 | { |
468 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
469 | if (flag > 0 || flag == -2) | |
470 | *(Lisp_Object *)(offset + (char *)b) = | |
471 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
472 | } | |
1ab256cb RM |
473 | } |
474 | ||
01050cb5 RM |
475 | /* We split this away from generate-new-buffer, because rename-buffer |
476 | and set-visited-file-name ought to be able to use this to really | |
477 | rename the buffer properly. */ | |
478 | ||
479 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 480 | 1, 2, 0, |
01050cb5 RM |
481 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
482 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 483 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 484 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 485 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 486 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 487 | even if a buffer with that name exists.") |
c273e647 RS |
488 | (name, ignore) |
489 | register Lisp_Object name, ignore; | |
1ab256cb RM |
490 | { |
491 | register Lisp_Object gentemp, tem; | |
492 | int count; | |
493 | char number[10]; | |
494 | ||
495 | CHECK_STRING (name, 0); | |
496 | ||
497 | tem = Fget_buffer (name); | |
265a9e55 | 498 | if (NILP (tem)) |
01050cb5 | 499 | return name; |
1ab256cb RM |
500 | |
501 | count = 1; | |
502 | while (1) | |
503 | { | |
504 | sprintf (number, "<%d>", ++count); | |
505 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 506 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
507 | if (!NILP (tem)) |
508 | return gentemp; | |
1ab256cb | 509 | tem = Fget_buffer (gentemp); |
265a9e55 | 510 | if (NILP (tem)) |
01050cb5 | 511 | return gentemp; |
1ab256cb RM |
512 | } |
513 | } | |
514 | ||
515 | \f | |
516 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
517 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 518 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
519 | (buffer) |
520 | register Lisp_Object buffer; | |
521 | { | |
265a9e55 | 522 | if (NILP (buffer)) |
1ab256cb RM |
523 | return current_buffer->name; |
524 | CHECK_BUFFER (buffer, 0); | |
525 | return XBUFFER (buffer)->name; | |
526 | } | |
527 | ||
528 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
529 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
530 | No argument or nil as argument means use the current buffer.") | |
531 | (buffer) | |
532 | register Lisp_Object buffer; | |
533 | { | |
265a9e55 | 534 | if (NILP (buffer)) |
1ab256cb RM |
535 | return current_buffer->filename; |
536 | CHECK_BUFFER (buffer, 0); | |
537 | return XBUFFER (buffer)->filename; | |
538 | } | |
539 | ||
336cd056 RS |
540 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
541 | 0, 1, 0, | |
542 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
543 | If BUFFER is not indirect, return nil.") | |
544 | (buffer) | |
545 | register Lisp_Object buffer; | |
546 | { | |
547 | struct buffer *base; | |
548 | Lisp_Object base_buffer; | |
549 | ||
550 | if (NILP (buffer)) | |
551 | base = current_buffer->base_buffer; | |
552 | else | |
553 | { | |
554 | CHECK_BUFFER (buffer, 0); | |
555 | base = XBUFFER (buffer)->base_buffer; | |
556 | } | |
557 | ||
558 | if (! base) | |
559 | return Qnil; | |
560 | XSETBUFFER (base_buffer, base); | |
561 | return base_buffer; | |
562 | } | |
563 | ||
1ab256cb RM |
564 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
565 | Sbuffer_local_variables, 0, 1, 0, | |
566 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
567 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
568 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
569 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
570 | No argument or nil as argument means use current buffer as BUFFER.") | |
571 | (buffer) | |
572 | register Lisp_Object buffer; | |
573 | { | |
574 | register struct buffer *buf; | |
553defa4 | 575 | register Lisp_Object result; |
1ab256cb | 576 | |
265a9e55 | 577 | if (NILP (buffer)) |
1ab256cb RM |
578 | buf = current_buffer; |
579 | else | |
580 | { | |
581 | CHECK_BUFFER (buffer, 0); | |
582 | buf = XBUFFER (buffer); | |
583 | } | |
584 | ||
553defa4 RS |
585 | result = Qnil; |
586 | ||
1ab256cb RM |
587 | { |
588 | /* Reference each variable in the alist in our current buffer. | |
589 | If inquiring about the current buffer, this gets the current values, | |
590 | so store them into the alist so the alist is up to date. | |
591 | If inquiring about some other buffer, this swaps out any values | |
592 | for that buffer, making the alist up to date automatically. */ | |
553defa4 RS |
593 | register Lisp_Object tail; |
594 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 595 | { |
553defa4 RS |
596 | Lisp_Object val, elt; |
597 | ||
598 | elt = XCONS (tail)->car; | |
599 | ||
1ab256cb | 600 | if (buf == current_buffer) |
553defa4 RS |
601 | val = find_symbol_value (XCONS (elt)->car); |
602 | else | |
603 | val = XCONS (elt)->cdr; | |
604 | ||
605 | /* If symbol is unbound, put just the symbol in the list. */ | |
606 | if (EQ (val, Qunbound)) | |
607 | result = Fcons (XCONS (elt)->car, result); | |
608 | /* Otherwise, put (symbol . value) in the list. */ | |
609 | else | |
610 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
611 | } |
612 | } | |
613 | ||
1ab256cb RM |
614 | /* Add on all the variables stored in special slots. */ |
615 | { | |
616 | register int offset, mask; | |
617 | ||
618 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
619 | offset < sizeof (struct buffer); | |
4d2f1389 | 620 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 621 | { |
aab80822 | 622 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 623 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
624 | if (SYMBOLP (*(Lisp_Object *)(offset |
625 | + (char *)&buffer_local_symbols))) | |
626 | result = Fcons (Fcons (*((Lisp_Object *) | |
627 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
628 | *(Lisp_Object *)(offset + (char *)buf)), |
629 | result); | |
1ab256cb RM |
630 | } |
631 | } | |
553defa4 RS |
632 | |
633 | return result; | |
1ab256cb RM |
634 | } |
635 | ||
636 | \f | |
637 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
638 | 0, 1, 0, | |
639 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
640 | No argument or nil as argument means use current buffer as BUFFER.") | |
641 | (buffer) | |
642 | register Lisp_Object buffer; | |
643 | { | |
644 | register struct buffer *buf; | |
265a9e55 | 645 | if (NILP (buffer)) |
1ab256cb RM |
646 | buf = current_buffer; |
647 | else | |
648 | { | |
649 | CHECK_BUFFER (buffer, 0); | |
650 | buf = XBUFFER (buffer); | |
651 | } | |
652 | ||
336cd056 | 653 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
654 | } |
655 | ||
656 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
657 | 1, 1, 0, | |
658 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
659 | A non-nil FLAG means mark the buffer modified.") | |
660 | (flag) | |
661 | register Lisp_Object flag; | |
662 | { | |
663 | register int already; | |
664 | register Lisp_Object fn; | |
665 | ||
666 | #ifdef CLASH_DETECTION | |
667 | /* If buffer becoming modified, lock the file. | |
668 | If buffer becoming unmodified, unlock the file. */ | |
669 | ||
670 | fn = current_buffer->filename; | |
265a9e55 | 671 | if (!NILP (fn)) |
1ab256cb | 672 | { |
336cd056 | 673 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 674 | if (!already && !NILP (flag)) |
1ab256cb | 675 | lock_file (fn); |
265a9e55 | 676 | else if (already && NILP (flag)) |
1ab256cb RM |
677 | unlock_file (fn); |
678 | } | |
679 | #endif /* CLASH_DETECTION */ | |
680 | ||
336cd056 | 681 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
682 | update_mode_lines++; |
683 | return flag; | |
684 | } | |
685 | ||
686 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
687 | 0, 1, 0, | |
688 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
689 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
690 | that buffer is changed. It wraps around occasionally.\n\ | |
691 | No argument or nil as argument means use current buffer as BUFFER.") | |
692 | (buffer) | |
693 | register Lisp_Object buffer; | |
694 | { | |
695 | register struct buffer *buf; | |
265a9e55 | 696 | if (NILP (buffer)) |
1ab256cb RM |
697 | buf = current_buffer; |
698 | else | |
699 | { | |
700 | CHECK_BUFFER (buffer, 0); | |
701 | buf = XBUFFER (buffer); | |
702 | } | |
703 | ||
704 | return make_number (BUF_MODIFF (buf)); | |
705 | } | |
706 | \f | |
01050cb5 | 707 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 708 | "sRename buffer (to new name): \nP", |
1ab256cb | 709 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 710 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 711 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 712 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 713 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
714 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
715 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 716 | This does not change the name of the visited file (if any).") |
489c043a RS |
717 | (newname, unique) |
718 | register Lisp_Object newname, unique; | |
1ab256cb RM |
719 | { |
720 | register Lisp_Object tem, buf; | |
721 | ||
489c043a | 722 | CHECK_STRING (newname, 0); |
d59698c4 | 723 | |
489c043a | 724 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
725 | error ("Empty string is invalid as a buffer name"); |
726 | ||
489c043a | 727 | tem = Fget_buffer (newname); |
c059b5ea RM |
728 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
729 | the buffer automatically so you can create another with the original name. | |
730 | It makes UNIQUE equivalent to | |
489c043a | 731 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 732 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 733 | return current_buffer->name; |
265a9e55 | 734 | if (!NILP (tem)) |
01050cb5 | 735 | { |
3bd779aa | 736 | if (!NILP (unique)) |
489c043a | 737 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 738 | else |
489c043a | 739 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 740 | } |
1ab256cb | 741 | |
489c043a | 742 | current_buffer->name = newname; |
76f590d7 JB |
743 | |
744 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
745 | any windows displaying current_buffer will stay unchanged. */ | |
746 | update_mode_lines++; | |
747 | ||
67180c6a | 748 | XSETBUFFER (buf, current_buffer); |
489c043a | 749 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
750 | if (NILP (current_buffer->filename) |
751 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 752 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
753 | /* Refetch since that last call may have done GC. */ |
754 | return current_buffer->name; | |
1ab256cb RM |
755 | } |
756 | ||
a0ebb746 | 757 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 758 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
759 | Buffers not visible in windows are preferred to visible buffers,\n\ |
760 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
761 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
762 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
763 | (buffer, visible_ok) |
764 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
765 | { |
766 | register Lisp_Object tail, buf, notsogood, tem; | |
767 | notsogood = Qnil; | |
768 | ||
265a9e55 | 769 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
770 | { |
771 | buf = Fcdr (Fcar (tail)); | |
772 | if (EQ (buf, buffer)) | |
773 | continue; | |
774 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
775 | continue; | |
04ae1b48 RS |
776 | #ifdef MULTI_FRAME |
777 | /* If the selected frame has a buffer_predicate, | |
778 | disregard buffers that don't fit the predicate. */ | |
779 | tem = frame_buffer_predicate (); | |
780 | if (!NILP (tem)) | |
781 | { | |
782 | tem = call1 (tem, buf); | |
783 | if (NILP (tem)) | |
784 | continue; | |
785 | } | |
786 | #endif | |
787 | ||
a0ebb746 | 788 | if (NILP (visible_ok)) |
db732e5a | 789 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
790 | else |
791 | tem = Qnil; | |
265a9e55 | 792 | if (NILP (tem)) |
1ab256cb | 793 | return buf; |
265a9e55 | 794 | if (NILP (notsogood)) |
1ab256cb RM |
795 | notsogood = buf; |
796 | } | |
265a9e55 | 797 | if (!NILP (notsogood)) |
1ab256cb RM |
798 | return notsogood; |
799 | return Fget_buffer_create (build_string ("*scratch*")); | |
800 | } | |
801 | \f | |
5b8bcf48 | 802 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1, |
1ab256cb | 803 | 0, |
5b8bcf48 RS |
804 | "Make BUFFER stop keeping undo information.\n\ |
805 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
806 | (buffer) |
807 | register Lisp_Object buffer; | |
1ab256cb | 808 | { |
ffd56f97 JB |
809 | Lisp_Object real_buffer; |
810 | ||
811 | if (NILP (buffer)) | |
67180c6a | 812 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
813 | else |
814 | { | |
815 | real_buffer = Fget_buffer (buffer); | |
816 | if (NILP (real_buffer)) | |
817 | nsberror (buffer); | |
818 | } | |
819 | ||
820 | XBUFFER (real_buffer)->undo_list = Qt; | |
821 | ||
1ab256cb RM |
822 | return Qnil; |
823 | } | |
824 | ||
825 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
826 | 0, 1, "", | |
827 | "Start keeping undo information for buffer BUFFER.\n\ | |
828 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
829 | (buffer) |
830 | register Lisp_Object buffer; | |
1ab256cb | 831 | { |
ffd56f97 | 832 | Lisp_Object real_buffer; |
1ab256cb | 833 | |
ffd56f97 | 834 | if (NILP (buffer)) |
67180c6a | 835 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
836 | else |
837 | { | |
ffd56f97 JB |
838 | real_buffer = Fget_buffer (buffer); |
839 | if (NILP (real_buffer)) | |
840 | nsberror (buffer); | |
1ab256cb RM |
841 | } |
842 | ||
ffd56f97 JB |
843 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
844 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
845 | |
846 | return Qnil; | |
847 | } | |
848 | ||
849 | /* | |
850 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
851 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
852 | The buffer being killed will be current while the hook is running.\n\ | |
853 | See `kill-buffer'." | |
854 | */ | |
855 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
856 | "Kill the buffer BUFFER.\n\ | |
857 | The argument may be a buffer or may be the name of a buffer.\n\ | |
858 | An argument of nil means kill the current buffer.\n\n\ | |
859 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
860 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
861 | if not void, is a list of functions to be called, with no arguments,\n\ | |
862 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
863 | when the hook functions are called.\n\n\ | |
864 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
865 | with `delete-process'.") | |
866 | (bufname) | |
867 | Lisp_Object bufname; | |
868 | { | |
869 | Lisp_Object buf; | |
870 | register struct buffer *b; | |
871 | register Lisp_Object tem; | |
872 | register struct Lisp_Marker *m; | |
873 | struct gcpro gcpro1, gcpro2; | |
874 | ||
265a9e55 | 875 | if (NILP (bufname)) |
1ab256cb RM |
876 | buf = Fcurrent_buffer (); |
877 | else | |
878 | buf = Fget_buffer (bufname); | |
265a9e55 | 879 | if (NILP (buf)) |
1ab256cb RM |
880 | nsberror (bufname); |
881 | ||
882 | b = XBUFFER (buf); | |
883 | ||
884 | /* Query if the buffer is still modified. */ | |
265a9e55 | 885 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 886 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb RM |
887 | { |
888 | GCPRO2 (buf, bufname); | |
889 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
890 | XSTRING (b->name)->data)); | |
891 | UNGCPRO; | |
265a9e55 | 892 | if (NILP (tem)) |
1ab256cb RM |
893 | return Qnil; |
894 | } | |
895 | ||
dcdffbf6 | 896 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
897 | { |
898 | register Lisp_Object val; | |
899 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 900 | Lisp_Object list; |
1ab256cb RM |
901 | |
902 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
903 | set_buffer_internal (b); | |
dcdffbf6 RS |
904 | |
905 | /* First run the query functions; if any query is answered no, | |
906 | don't kill the buffer. */ | |
907 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
908 | { | |
909 | tem = call0 (Fcar (list)); | |
910 | if (NILP (tem)) | |
911 | return unbind_to (count, Qnil); | |
912 | } | |
913 | ||
914 | /* Then run the hooks. */ | |
fd186f07 RS |
915 | if (!NILP (Vrun_hooks)) |
916 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
917 | unbind_to (count, Qnil); |
918 | } | |
919 | ||
920 | /* We have no more questions to ask. Verify that it is valid | |
921 | to kill the buffer. This must be done after the questions | |
922 | since anything can happen within do_yes_or_no_p. */ | |
923 | ||
924 | /* Don't kill the minibuffer now current. */ | |
925 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
926 | return Qnil; | |
927 | ||
265a9e55 | 928 | if (NILP (b->name)) |
1ab256cb RM |
929 | return Qnil; |
930 | ||
336cd056 RS |
931 | /* When we kill a base buffer, kill all its indirect buffers. |
932 | We do it at this stage so nothing terrible happens if they | |
933 | ask questions or their hooks get errors. */ | |
934 | if (! b->base_buffer) | |
935 | { | |
936 | struct buffer *other; | |
937 | ||
938 | GCPRO1 (buf); | |
939 | ||
940 | for (other = all_buffers; other; other = other->next) | |
941 | if (other->base_buffer == b) | |
942 | { | |
943 | Lisp_Object buf; | |
944 | XSETBUFFER (buf, other); | |
945 | Fkill_buffer (buf); | |
946 | } | |
947 | ||
948 | UNGCPRO; | |
949 | } | |
950 | ||
1ab256cb RM |
951 | /* Make this buffer not be current. |
952 | In the process, notice if this is the sole visible buffer | |
953 | and give up if so. */ | |
954 | if (b == current_buffer) | |
955 | { | |
172a9c1f | 956 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
957 | Fset_buffer (tem); |
958 | if (b == current_buffer) | |
959 | return Qnil; | |
960 | } | |
961 | ||
962 | /* Now there is no question: we can kill the buffer. */ | |
963 | ||
964 | #ifdef CLASH_DETECTION | |
965 | /* Unlock this buffer's file, if it is locked. */ | |
966 | unlock_buffer (b); | |
967 | #endif /* CLASH_DETECTION */ | |
968 | ||
1ab256cb | 969 | kill_buffer_processes (buf); |
1ab256cb RM |
970 | |
971 | tem = Vinhibit_quit; | |
972 | Vinhibit_quit = Qt; | |
973 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
974 | Freplace_buffer_in_windows (buf); | |
975 | Vinhibit_quit = tem; | |
976 | ||
9b59d6d0 | 977 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 978 | if (STRINGP (b->auto_save_file_name) |
9b59d6d0 | 979 | && b->auto_save_modified != 0) |
1ab256cb RM |
980 | { |
981 | Lisp_Object tem; | |
982 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 983 | if (! NILP (tem)) |
cbb6a418 | 984 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
985 | } |
986 | ||
336cd056 | 987 | if (! b->base_buffer) |
1ab256cb | 988 | { |
336cd056 RS |
989 | /* Unchain all markers of this buffer |
990 | and leave them pointing nowhere. */ | |
991 | for (tem = BUF_MARKERS (b); !EQ (tem, Qnil); ) | |
992 | { | |
993 | m = XMARKER (tem); | |
994 | m->buffer = 0; | |
995 | tem = m->chain; | |
996 | m->chain = Qnil; | |
997 | } | |
998 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 999 | |
336cd056 RS |
1000 | #ifdef USE_TEXT_PROPERTIES |
1001 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1002 | #endif | |
1003 | ||
1004 | /* Perhaps we should explicitly free the interval tree here... */ | |
1005 | } | |
33f7013e | 1006 | |
1ab256cb | 1007 | b->name = Qnil; |
336cd056 | 1008 | |
9ac0d9e0 | 1009 | BLOCK_INPUT; |
336cd056 RS |
1010 | if (! b->base_buffer) |
1011 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1012 | ||
28e969dd JB |
1013 | if (b->newline_cache) |
1014 | { | |
1015 | free_region_cache (b->newline_cache); | |
1016 | b->newline_cache = 0; | |
1017 | } | |
1018 | if (b->width_run_cache) | |
1019 | { | |
1020 | free_region_cache (b->width_run_cache); | |
1021 | b->width_run_cache = 0; | |
1022 | } | |
1023 | b->width_table = Qnil; | |
9ac0d9e0 | 1024 | UNBLOCK_INPUT; |
1ab256cb RM |
1025 | b->undo_list = Qnil; |
1026 | ||
1027 | return Qt; | |
1028 | } | |
1029 | \f | |
36a8c287 JB |
1030 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1031 | we do this each time BUF is selected visibly, the more recently | |
1032 | selected buffers are always closer to the front of the list. This | |
1033 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
1034 | |
1035 | record_buffer (buf) | |
1036 | Lisp_Object buf; | |
1037 | { | |
1038 | register Lisp_Object link, prev; | |
1039 | ||
1040 | prev = Qnil; | |
1041 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1042 | { | |
1043 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1044 | break; | |
1045 | prev = link; | |
1046 | } | |
1047 | ||
36a8c287 JB |
1048 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1049 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1050 | |
265a9e55 | 1051 | if (NILP (prev)) |
1ab256cb RM |
1052 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1053 | else | |
1054 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1055 | ||
1056 | XCONS(link)->cdr = Vbuffer_alist; | |
1057 | Vbuffer_alist = link; | |
1058 | } | |
1059 | ||
a9ee7a59 KH |
1060 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1061 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1062 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1063 | the current buffer's major mode.") | |
1064 | (buf) | |
1065 | Lisp_Object buf; | |
1066 | { | |
1067 | int count; | |
1068 | Lisp_Object function; | |
1069 | ||
1070 | function = buffer_defaults.major_mode; | |
1071 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1072 | function = current_buffer->major_mode; | |
1073 | ||
1074 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1075 | return Qnil; | |
1076 | ||
1077 | count = specpdl_ptr - specpdl; | |
1078 | ||
1079 | /* To select a nonfundamental mode, | |
1080 | select the buffer temporarily and then call the mode function. */ | |
1081 | ||
1082 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1083 | ||
1084 | Fset_buffer (buf); | |
1085 | call0 (function); | |
1086 | ||
1087 | return unbind_to (count, Qnil); | |
1088 | } | |
1089 | ||
1ab256cb RM |
1090 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1091 | "Select buffer BUFFER in the current window.\n\ | |
1092 | BUFFER may be a buffer or a buffer name.\n\ | |
1093 | Optional second arg NORECORD non-nil means\n\ | |
1094 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1095 | \n\ | |
1096 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1097 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1098 | the window-buffer correspondences.") | |
1099 | (bufname, norecord) | |
1100 | Lisp_Object bufname, norecord; | |
1101 | { | |
1102 | register Lisp_Object buf; | |
1103 | Lisp_Object tem; | |
1104 | ||
1105 | if (EQ (minibuf_window, selected_window)) | |
1106 | error ("Cannot switch buffers in minibuffer window"); | |
1107 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1108 | if (!NILP (tem)) |
1ab256cb RM |
1109 | error ("Cannot switch buffers in a dedicated window"); |
1110 | ||
265a9e55 | 1111 | if (NILP (bufname)) |
172a9c1f | 1112 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1113 | else |
a9ee7a59 KH |
1114 | { |
1115 | buf = Fget_buffer (bufname); | |
1116 | if (NILP (buf)) | |
1117 | { | |
1118 | buf = Fget_buffer_create (bufname); | |
1119 | Fset_buffer_major_mode (buf); | |
1120 | } | |
1121 | } | |
1ab256cb | 1122 | Fset_buffer (buf); |
265a9e55 | 1123 | if (NILP (norecord)) |
1ab256cb RM |
1124 | record_buffer (buf); |
1125 | ||
1126 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1127 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1128 | : selected_window, | |
1ab256cb RM |
1129 | buf); |
1130 | ||
e8b3a22d | 1131 | return buf; |
1ab256cb RM |
1132 | } |
1133 | ||
1134 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
1135 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
1136 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1137 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1138 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
1139 | window even if BUFFER is already visible in the selected window.") | |
1140 | (bufname, other) | |
1141 | Lisp_Object bufname, other; | |
1142 | { | |
1143 | register Lisp_Object buf; | |
265a9e55 | 1144 | if (NILP (bufname)) |
172a9c1f | 1145 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
1146 | else |
1147 | buf = Fget_buffer_create (bufname); | |
1148 | Fset_buffer (buf); | |
1149 | record_buffer (buf); | |
1150 | Fselect_window (Fdisplay_buffer (buf, other)); | |
e8b3a22d | 1151 | return buf; |
1ab256cb RM |
1152 | } |
1153 | ||
1154 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1155 | "Return the current buffer as a Lisp object.") | |
1156 | () | |
1157 | { | |
1158 | register Lisp_Object buf; | |
67180c6a | 1159 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1160 | return buf; |
1161 | } | |
1162 | \f | |
1163 | /* Set the current buffer to b */ | |
1164 | ||
1165 | void | |
1166 | set_buffer_internal (b) | |
1167 | register struct buffer *b; | |
1168 | { | |
1169 | register struct buffer *old_buf; | |
1170 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1171 | Lisp_Object tem; |
1ab256cb RM |
1172 | |
1173 | if (current_buffer == b) | |
1174 | return; | |
1175 | ||
1176 | windows_or_buffers_changed = 1; | |
1177 | old_buf = current_buffer; | |
1178 | current_buffer = b; | |
1179 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1180 | ||
336cd056 RS |
1181 | if (old_buf) |
1182 | { | |
1183 | /* Put the undo list back in the base buffer, so that it appears | |
1184 | that an indirect buffer shares the undo list of its base. */ | |
1185 | if (old_buf->base_buffer) | |
1186 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1187 | ||
1188 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1189 | when it is not current, update them now. */ | |
1190 | if (! NILP (old_buf->pt_marker)) | |
1191 | { | |
1192 | Lisp_Object obuf; | |
1193 | XSETBUFFER (obuf, old_buf); | |
1194 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1195 | } | |
1196 | if (! NILP (old_buf->begv_marker)) | |
1197 | { | |
1198 | Lisp_Object obuf; | |
1199 | XSETBUFFER (obuf, old_buf); | |
1200 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1201 | } | |
1202 | if (! NILP (old_buf->zv_marker)) | |
1203 | { | |
1204 | Lisp_Object obuf; | |
1205 | XSETBUFFER (obuf, old_buf); | |
1206 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | /* Get the undo list from the base buffer, so that it appears | |
1211 | that an indirect buffer shares the undo list of its base. */ | |
1212 | if (b->base_buffer) | |
1213 | b->undo_list = b->base_buffer->undo_list; | |
1214 | ||
1215 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1216 | when it is not current, fetch them now. */ | |
1217 | if (! NILP (b->pt_marker)) | |
1218 | BUF_PT (b) = marker_position (b->pt_marker); | |
1219 | if (! NILP (b->begv_marker)) | |
1220 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1221 | if (! NILP (b->zv_marker)) | |
1222 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1223 | ||
1ab256cb RM |
1224 | /* Look down buffer's list of local Lisp variables |
1225 | to find and update any that forward into C variables. */ | |
1226 | ||
265a9e55 | 1227 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1228 | { |
1229 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1230 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1231 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1232 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1233 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1234 | /* Just reference the variable |
1235 | to cause it to become set for this buffer. */ | |
1236 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1237 | } | |
1238 | ||
1239 | /* Do the same with any others that were local to the previous buffer */ | |
1240 | ||
1241 | if (old_buf) | |
265a9e55 | 1242 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1243 | { |
1244 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1245 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1246 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1247 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1248 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1249 | /* Just reference the variable |
1250 | to cause it to become set for this buffer. */ | |
1251 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1252 | } | |
1253 | } | |
1254 | ||
336cd056 RS |
1255 | /* Switch to buffer B temporarily for redisplay purposes. |
1256 | This avoids certain things thatdon't need to be done within redisplay. */ | |
1257 | ||
1258 | void | |
1259 | set_buffer_temp (b) | |
1260 | struct buffer *b; | |
1261 | { | |
1262 | register struct buffer *old_buf; | |
1263 | ||
1264 | if (current_buffer == b) | |
1265 | return; | |
1266 | ||
1267 | old_buf = current_buffer; | |
1268 | current_buffer = b; | |
1269 | ||
1270 | if (old_buf) | |
1271 | { | |
1272 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1273 | when it is not current, update them now. */ | |
1274 | if (! NILP (old_buf->pt_marker)) | |
1275 | { | |
1276 | Lisp_Object obuf; | |
1277 | XSETBUFFER (obuf, old_buf); | |
1278 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1279 | } | |
1280 | if (! NILP (old_buf->begv_marker)) | |
1281 | { | |
1282 | Lisp_Object obuf; | |
1283 | XSETBUFFER (obuf, old_buf); | |
1284 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1285 | } | |
1286 | if (! NILP (old_buf->zv_marker)) | |
1287 | { | |
1288 | Lisp_Object obuf; | |
1289 | XSETBUFFER (obuf, old_buf); | |
1290 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1295 | when it is not current, fetch them now. */ | |
1296 | if (! NILP (b->pt_marker)) | |
1297 | BUF_PT (b) = marker_position (b->pt_marker); | |
1298 | if (! NILP (b->begv_marker)) | |
1299 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1300 | if (! NILP (b->zv_marker)) | |
1301 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1302 | } | |
1303 | ||
1ab256cb RM |
1304 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1305 | "Make the buffer BUFFER current for editing operations.\n\ | |
1306 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1307 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1308 | This function does not display the buffer, so its effect ends\n\ | |
1309 | when the current command terminates.\n\ | |
1310 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
1311 | (bufname) | |
1312 | register Lisp_Object bufname; | |
1313 | { | |
1314 | register Lisp_Object buffer; | |
1315 | buffer = Fget_buffer (bufname); | |
265a9e55 | 1316 | if (NILP (buffer)) |
1ab256cb | 1317 | nsberror (bufname); |
265a9e55 | 1318 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
1319 | error ("Selecting deleted buffer"); |
1320 | set_buffer_internal (XBUFFER (buffer)); | |
1321 | return buffer; | |
1322 | } | |
1323 | \f | |
1324 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1325 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1326 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1327 | () | |
1328 | { | |
a96b68f1 RS |
1329 | if (!NILP (current_buffer->read_only) |
1330 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1331 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1332 | return Qnil; | |
1333 | } | |
1334 | ||
1335 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1336 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1337 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1338 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1339 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1340 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1341 | selected window if it is displayed there.") | |
1ab256cb RM |
1342 | (buf) |
1343 | register Lisp_Object buf; | |
1344 | { | |
b271272a | 1345 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 1346 | if (NILP (buf)) |
a5611885 | 1347 | { |
67180c6a | 1348 | XSETBUFFER (buf, current_buffer); |
a5611885 JB |
1349 | |
1350 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 1351 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 1352 | } |
1ab256cb RM |
1353 | else |
1354 | { | |
1355 | Lisp_Object buf1; | |
1356 | ||
1357 | buf1 = Fget_buffer (buf); | |
265a9e55 | 1358 | if (NILP (buf1)) |
1ab256cb RM |
1359 | nsberror (buf); |
1360 | buf = buf1; | |
b271272a JB |
1361 | } |
1362 | ||
a5611885 | 1363 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
1364 | { |
1365 | register Lisp_Object aelt, link; | |
1366 | ||
1367 | aelt = Frassq (buf, Vbuffer_alist); | |
1368 | link = Fmemq (aelt, Vbuffer_alist); | |
1369 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1370 | XCONS (link)->cdr = Qnil; | |
1371 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1372 | } | |
1ab256cb | 1373 | |
1ab256cb RM |
1374 | return Qnil; |
1375 | } | |
1376 | \f | |
c922bc55 | 1377 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1378 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1379 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1380 | so the buffer is truly empty after this.") |
1381 | () | |
1382 | { | |
1383 | Fwiden (); | |
1384 | del_range (BEG, Z); | |
1385 | current_buffer->last_window_start = 1; | |
1386 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1387 | if future size is less than past size. Use of erase-buffer | |
1388 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1389 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1390 | return Qnil; |
1391 | } | |
1392 | ||
1393 | validate_region (b, e) | |
1394 | register Lisp_Object *b, *e; | |
1395 | { | |
1ab256cb RM |
1396 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1397 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1398 | ||
1399 | if (XINT (*b) > XINT (*e)) | |
1400 | { | |
03192067 KH |
1401 | Lisp_Object tem; |
1402 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1403 | } |
1404 | ||
1405 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1406 | && XINT (*e) <= ZV)) | |
1407 | args_out_of_range (*b, *e); | |
1408 | } | |
1409 | \f | |
9f31d21b | 1410 | static Lisp_Object |
1ab256cb RM |
1411 | list_buffers_1 (files) |
1412 | Lisp_Object files; | |
1413 | { | |
1414 | register Lisp_Object tail, tem, buf; | |
1415 | Lisp_Object col1, col2, col3, minspace; | |
1416 | register struct buffer *old = current_buffer, *b; | |
718cde7d | 1417 | Lisp_Object desired_point; |
1ab256cb RM |
1418 | Lisp_Object other_file_symbol; |
1419 | ||
718cde7d | 1420 | desired_point = Qnil; |
1ab256cb RM |
1421 | other_file_symbol = intern ("list-buffers-directory"); |
1422 | ||
5296fd18 RS |
1423 | XSETFASTINT (col1, 17); |
1424 | XSETFASTINT (col2, 28); | |
8d7a4592 KH |
1425 | XSETFASTINT (col3, 40); |
1426 | XSETFASTINT (minspace, 1); | |
1ab256cb RM |
1427 | |
1428 | Fset_buffer (Vstandard_output); | |
1ab256cb RM |
1429 | Fbuffer_disable_undo (Vstandard_output); |
1430 | current_buffer->read_only = Qnil; | |
1431 | ||
1432 | write_string ("\ | |
5296fd18 RS |
1433 | MR Buffer Size Mode File\n\ |
1434 | -- ------ ---- ---- ----\n", -1); | |
1ab256cb | 1435 | |
265a9e55 | 1436 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
1437 | { |
1438 | buf = Fcdr (Fcar (tail)); | |
1439 | b = XBUFFER (buf); | |
1440 | /* Don't mention the minibuffers. */ | |
1441 | if (XSTRING (b->name)->data[0] == ' ') | |
1442 | continue; | |
1443 | /* Optionally don't mention buffers that lack files. */ | |
265a9e55 | 1444 | if (!NILP (files) && NILP (b->filename)) |
1ab256cb RM |
1445 | continue; |
1446 | /* Identify the current buffer. */ | |
1447 | if (b == old) | |
48e2e3ba | 1448 | XSETFASTINT (desired_point, PT); |
1ab256cb RM |
1449 | write_string (b == old ? "." : " ", -1); |
1450 | /* Identify modified buffers */ | |
336cd056 | 1451 | write_string (BUF_MODIFF (b) > BUF_SAVE_MODIFF (b) ? "*" : " ", -1); |
b5b4d360 RS |
1452 | /* The current buffer is special-cased to be marked read-only. |
1453 | It is actually made read-only by the call to | |
1454 | Buffer-menu-mode, below. */ | |
1455 | write_string ((b != current_buffer && NILP (b->read_only)) | |
1456 | ? " " : "% ", -1); | |
1ab256cb | 1457 | Fprinc (b->name, Qnil); |
5296fd18 RS |
1458 | tem = Findent_to (col1, make_number (2)); |
1459 | { | |
1460 | char sizebuf[9]; | |
1461 | int i; | |
1462 | char *p; | |
1463 | ||
1464 | sprintf (sizebuf, "%8d", BUF_Z (b) - BUF_BEG (b)); | |
1465 | /* Here's how many extra columns the buffer name used. */ | |
1466 | i = XFASTINT (tem) - XFASTINT (col1); | |
1467 | /* Skip that many spaces in the size, if it has that many, | |
1468 | to keep the size values right-aligned if possible. */ | |
1469 | p = sizebuf; | |
1470 | while (i > 0) | |
1471 | { | |
1472 | if (*p == ' ') | |
1473 | p++; | |
1474 | i--; | |
1475 | } | |
1476 | ||
1477 | write_string (p, -1); | |
1478 | } | |
1ab256cb RM |
1479 | Findent_to (col2, minspace); |
1480 | Fprinc (b->mode_name, Qnil); | |
1481 | Findent_to (col3, minspace); | |
1482 | ||
265a9e55 | 1483 | if (!NILP (b->filename)) |
1ab256cb RM |
1484 | Fprinc (b->filename, Qnil); |
1485 | else | |
1486 | { | |
1487 | /* No visited file; check local value of list-buffers-directory. */ | |
1488 | Lisp_Object tem; | |
1489 | set_buffer_internal (b); | |
1490 | tem = Fboundp (other_file_symbol); | |
265a9e55 | 1491 | if (!NILP (tem)) |
1ab256cb RM |
1492 | { |
1493 | tem = Fsymbol_value (other_file_symbol); | |
1494 | Fset_buffer (Vstandard_output); | |
a7a60ce9 | 1495 | if (STRINGP (tem)) |
1ab256cb RM |
1496 | Fprinc (tem, Qnil); |
1497 | } | |
1498 | else | |
1499 | Fset_buffer (Vstandard_output); | |
1500 | } | |
1501 | write_string ("\n", -1); | |
1502 | } | |
1503 | ||
9f31d21b KH |
1504 | tail = intern ("Buffer-menu-mode"); |
1505 | if ((tem = Ffboundp (tail), !NILP (tem))) | |
1506 | call0 (tail); | |
1ab256cb | 1507 | set_buffer_internal (old); |
718cde7d | 1508 | return desired_point; |
1ab256cb RM |
1509 | } |
1510 | ||
1511 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", | |
1512 | "Display a list of names of existing buffers.\n\ | |
1513 | The list is displayed in a buffer named `*Buffer List*'.\n\ | |
1514 | Note that buffers with names starting with spaces are omitted.\n\ | |
1515 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ | |
1516 | \n\ | |
1517 | The M column contains a * for buffers that are modified.\n\ | |
1518 | The R column contains a % for buffers that are read-only.") | |
1519 | (files) | |
1520 | Lisp_Object files; | |
1521 | { | |
e87f38ef JB |
1522 | Lisp_Object desired_point; |
1523 | ||
fd2dab90 RS |
1524 | desired_point |
1525 | = internal_with_output_to_temp_buffer ("*Buffer List*", | |
1526 | list_buffers_1, files); | |
e87f38ef | 1527 | |
718cde7d JB |
1528 | if (NUMBERP (desired_point)) |
1529 | { | |
1530 | int count = specpdl_ptr - specpdl; | |
1531 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1532 | Fset_buffer (build_string ("*Buffer List*")); | |
1533 | SET_PT (XINT (desired_point)); | |
1534 | return unbind_to (count, Qnil); | |
1535 | } | |
fd2dab90 | 1536 | return Qnil; |
1ab256cb RM |
1537 | } |
1538 | ||
1539 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, | |
1540 | 0, 0, 0, | |
1541 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1542 | Most local variable bindings are eliminated so that the default values\n\ | |
1543 | become effective once more. Also, the syntax table is set from\n\ | |
1544 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1545 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1546 | This function also forces redisplay of the mode line.\n\ | |
1547 | \n\ | |
1548 | Every function to select a new major mode starts by\n\ | |
1549 | calling this function.\n\n\ | |
1550 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1551 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1552 | \n\ | |
1553 | The first thing this function does is run\n\ | |
1554 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1555 | () |
1556 | { | |
1557 | register Lisp_Object alist, sym, tem; | |
1558 | Lisp_Object oalist; | |
7410477a | 1559 | |
fd186f07 RS |
1560 | if (!NILP (Vrun_hooks)) |
1561 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1562 | oalist = current_buffer->local_var_alist; |
1563 | ||
1564 | /* Make sure no local variables remain set up with this buffer | |
1565 | for their current values. */ | |
1566 | ||
265a9e55 | 1567 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1568 | { |
1569 | sym = XCONS (XCONS (alist)->car)->car; | |
1570 | ||
1571 | /* Need not do anything if some other buffer's binding is now encached. */ | |
6746ed7a | 1572 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; |
1ab256cb RM |
1573 | if (XBUFFER (tem) == current_buffer) |
1574 | { | |
1575 | /* Symbol is set up for this buffer's old local value. | |
1576 | Set it up for the current buffer with the default value. */ | |
1577 | ||
6746ed7a | 1578 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; |
542143d7 RS |
1579 | /* Store the symbol's current value into the alist entry |
1580 | it is currently set up for. This is so that, if the | |
1581 | local is marked permanent, and we make it local again below, | |
1582 | we don't lose the value. */ | |
2735b685 | 1583 | XCONS (XCONS (tem)->car)->cdr |
6746ed7a | 1584 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); |
542143d7 | 1585 | /* Switch to the symbol's default-value alist entry. */ |
1ab256cb | 1586 | XCONS (tem)->car = tem; |
542143d7 | 1587 | /* Mark it as current for the current buffer. */ |
6746ed7a KH |
1588 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car |
1589 | = Fcurrent_buffer (); | |
542143d7 | 1590 | /* Store the current value into any forwarding in the symbol. */ |
6746ed7a | 1591 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, |
1ab256cb RM |
1592 | XCONS (tem)->cdr); |
1593 | } | |
1594 | } | |
1595 | ||
1596 | /* Actually eliminate all local bindings of this buffer. */ | |
1597 | ||
1598 | reset_buffer_local_variables (current_buffer); | |
1599 | ||
1600 | /* Redisplay mode lines; we are changing major mode. */ | |
1601 | ||
1602 | update_mode_lines++; | |
1603 | ||
1604 | /* Any which are supposed to be permanent, | |
1605 | make local again, with the same values they had. */ | |
1606 | ||
265a9e55 | 1607 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1608 | { |
1609 | sym = XCONS (XCONS (alist)->car)->car; | |
1610 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1611 | if (! NILP (tem)) |
01050cb5 RM |
1612 | { |
1613 | Fmake_local_variable (sym); | |
1614 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1615 | } | |
1ab256cb RM |
1616 | } |
1617 | ||
1618 | /* Force mode-line redisplay. Useful here because all major mode | |
1619 | commands call this function. */ | |
1620 | update_mode_lines++; | |
1621 | ||
1622 | return Qnil; | |
1623 | } | |
1624 | \f | |
2eec3b4e RS |
1625 | /* Find all the overlays in the current buffer that contain position POS. |
1626 | Return the number found, and store them in a vector in *VEC_PTR. | |
1627 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1628 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1629 | or ZV if there are no more overlays. | |
239c932b RS |
1630 | Store in *PREV_PTR the previous position after POS where an overlay ends, |
1631 | or BEGV if there are no previous overlays. | |
1632 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1633 | |
1634 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1635 | when this function is called. |
1636 | ||
1637 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1638 | If EXTEND is zero, we never extend the vector, | |
1639 | and we store only as many overlays as will fit. | |
1640 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1641 | |
1642 | int | |
239c932b | 1643 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1644 | int pos; |
61d54cd5 | 1645 | int extend; |
2eec3b4e RS |
1646 | Lisp_Object **vec_ptr; |
1647 | int *len_ptr; | |
1648 | int *next_ptr; | |
239c932b | 1649 | int *prev_ptr; |
1ab256cb | 1650 | { |
2eec3b4e RS |
1651 | Lisp_Object tail, overlay, start, end, result; |
1652 | int idx = 0; | |
1653 | int len = *len_ptr; | |
1654 | Lisp_Object *vec = *vec_ptr; | |
1655 | int next = ZV; | |
239c932b | 1656 | int prev = BEGV; |
61d54cd5 RS |
1657 | int inhibit_storing = 0; |
1658 | ||
2eec3b4e | 1659 | for (tail = current_buffer->overlays_before; |
8fc0589a | 1660 | GC_CONSP (tail); |
2eec3b4e RS |
1661 | tail = XCONS (tail)->cdr) |
1662 | { | |
239c932b | 1663 | int startpos, endpos; |
52f8ec73 | 1664 | |
2eec3b4e | 1665 | overlay = XCONS (tail)->car; |
1ab256cb | 1666 | |
2eec3b4e RS |
1667 | start = OVERLAY_START (overlay); |
1668 | end = OVERLAY_END (overlay); | |
239c932b RS |
1669 | endpos = OVERLAY_POSITION (end); |
1670 | if (endpos < pos) | |
1671 | { | |
1672 | if (prev < endpos) | |
1673 | prev = endpos; | |
1674 | break; | |
1675 | } | |
1676 | if (endpos == pos) | |
1677 | continue; | |
2eec3b4e RS |
1678 | startpos = OVERLAY_POSITION (start); |
1679 | if (startpos <= pos) | |
1680 | { | |
1681 | if (idx == len) | |
1682 | { | |
61d54cd5 RS |
1683 | /* The supplied vector is full. |
1684 | Either make it bigger, or don't store any more in it. */ | |
1685 | if (extend) | |
1686 | { | |
1687 | *len_ptr = len *= 2; | |
1688 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1689 | *vec_ptr = vec; | |
1690 | } | |
1691 | else | |
1692 | inhibit_storing = 1; | |
2eec3b4e | 1693 | } |
61d54cd5 RS |
1694 | |
1695 | if (!inhibit_storing) | |
1696 | vec[idx] = overlay; | |
1697 | /* Keep counting overlays even if we can't return them all. */ | |
1698 | idx++; | |
2eec3b4e RS |
1699 | } |
1700 | else if (startpos < next) | |
1701 | next = startpos; | |
1702 | } | |
1703 | ||
1704 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 1705 | GC_CONSP (tail); |
2eec3b4e | 1706 | tail = XCONS (tail)->cdr) |
1ab256cb | 1707 | { |
239c932b | 1708 | int startpos, endpos; |
52f8ec73 | 1709 | |
2eec3b4e | 1710 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
1711 | |
1712 | start = OVERLAY_START (overlay); | |
1713 | end = OVERLAY_END (overlay); | |
1714 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1715 | if (pos < startpos) |
2eec3b4e RS |
1716 | { |
1717 | if (startpos < next) | |
1718 | next = startpos; | |
1719 | break; | |
1720 | } | |
239c932b RS |
1721 | endpos = OVERLAY_POSITION (end); |
1722 | if (pos < endpos) | |
2eec3b4e RS |
1723 | { |
1724 | if (idx == len) | |
1725 | { | |
61d54cd5 RS |
1726 | if (extend) |
1727 | { | |
1728 | *len_ptr = len *= 2; | |
1729 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1730 | *vec_ptr = vec; | |
1731 | } | |
1732 | else | |
1733 | inhibit_storing = 1; | |
2eec3b4e | 1734 | } |
61d54cd5 RS |
1735 | |
1736 | if (!inhibit_storing) | |
1737 | vec[idx] = overlay; | |
1738 | idx++; | |
2eec3b4e | 1739 | } |
239c932b RS |
1740 | else if (endpos < pos && endpos > prev) |
1741 | prev = endpos; | |
1ab256cb RM |
1742 | } |
1743 | ||
239c932b RS |
1744 | if (next_ptr) |
1745 | *next_ptr = next; | |
1746 | if (prev_ptr) | |
1747 | *prev_ptr = prev; | |
2eec3b4e RS |
1748 | return idx; |
1749 | } | |
1750 | \f | |
5985d248 KH |
1751 | struct sortvec |
1752 | { | |
1753 | Lisp_Object overlay; | |
1754 | int beg, end; | |
1755 | int priority; | |
1756 | }; | |
1757 | ||
1758 | static int | |
1759 | compare_overlays (s1, s2) | |
1760 | struct sortvec *s1, *s2; | |
1761 | { | |
1762 | if (s1->priority != s2->priority) | |
1763 | return s1->priority - s2->priority; | |
1764 | if (s1->beg != s2->beg) | |
1765 | return s1->beg - s2->beg; | |
1766 | if (s1->end != s2->end) | |
1767 | return s2->end - s1->end; | |
1768 | return 0; | |
1769 | } | |
1770 | ||
1771 | /* Sort an array of overlays by priority. The array is modified in place. | |
1772 | The return value is the new size; this may be smaller than the original | |
1773 | size if some of the overlays were invalid or were window-specific. */ | |
1774 | int | |
1775 | sort_overlays (overlay_vec, noverlays, w) | |
1776 | Lisp_Object *overlay_vec; | |
1777 | int noverlays; | |
1778 | struct window *w; | |
1779 | { | |
1780 | int i, j; | |
1781 | struct sortvec *sortvec; | |
1782 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1783 | ||
1784 | /* Put the valid and relevant overlays into sortvec. */ | |
1785 | ||
1786 | for (i = 0, j = 0; i < noverlays; i++) | |
1787 | { | |
0fa767e7 | 1788 | Lisp_Object tem; |
c99fc30f | 1789 | Lisp_Object overlay; |
5985d248 | 1790 | |
c99fc30f | 1791 | overlay = overlay_vec[i]; |
5985d248 KH |
1792 | if (OVERLAY_VALID (overlay) |
1793 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1794 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1795 | { | |
0fa767e7 KH |
1796 | /* If we're interested in a specific window, then ignore |
1797 | overlays that are limited to some other window. */ | |
1798 | if (w) | |
5985d248 | 1799 | { |
0fa767e7 KH |
1800 | Lisp_Object window; |
1801 | ||
1802 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 1803 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 1804 | continue; |
5985d248 | 1805 | } |
0fa767e7 KH |
1806 | |
1807 | /* This overlay is good and counts: put it into sortvec. */ | |
1808 | sortvec[j].overlay = overlay; | |
1809 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1810 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1811 | tem = Foverlay_get (overlay, Qpriority); | |
1812 | if (INTEGERP (tem)) | |
1813 | sortvec[j].priority = XINT (tem); | |
1814 | else | |
1815 | sortvec[j].priority = 0; | |
1816 | j++; | |
5985d248 KH |
1817 | } |
1818 | } | |
1819 | noverlays = j; | |
1820 | ||
1821 | /* Sort the overlays into the proper order: increasing priority. */ | |
1822 | ||
1823 | if (noverlays > 1) | |
1824 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
1825 | ||
1826 | for (i = 0; i < noverlays; i++) | |
1827 | overlay_vec[i] = sortvec[i].overlay; | |
1828 | return (noverlays); | |
1829 | } | |
1830 | \f | |
5c4f68f1 | 1831 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1832 | |
2eec3b4e | 1833 | void |
5c4f68f1 JB |
1834 | recenter_overlay_lists (buf, pos) |
1835 | struct buffer *buf; | |
2eec3b4e RS |
1836 | int pos; |
1837 | { | |
1838 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1839 | ||
1840 | /* See if anything in overlays_before should move to overlays_after. */ | |
1841 | ||
1842 | /* We don't strictly need prev in this loop; it should always be nil. | |
1843 | But we use it for symmetry and in case that should cease to be true | |
1844 | with some future change. */ | |
1845 | prev = Qnil; | |
5c4f68f1 | 1846 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1847 | CONSP (tail); |
1848 | prev = tail, tail = next) | |
1ab256cb | 1849 | { |
2eec3b4e RS |
1850 | next = XCONS (tail)->cdr; |
1851 | overlay = XCONS (tail)->car; | |
1852 | ||
1853 | /* If the overlay is not valid, get rid of it. */ | |
1854 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1855 | #if 1 |
1856 | abort (); | |
1857 | #else | |
2eec3b4e RS |
1858 | { |
1859 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1860 | if (!NILP (prev)) | |
1861 | XCONS (prev)->cdr = next; | |
1862 | else | |
5c4f68f1 | 1863 | buf->overlays_before = next; |
2eec3b4e RS |
1864 | tail = prev; |
1865 | continue; | |
1866 | } | |
52f8ec73 | 1867 | #endif |
1ab256cb | 1868 | |
2eec3b4e RS |
1869 | beg = OVERLAY_START (overlay); |
1870 | end = OVERLAY_END (overlay); | |
1ab256cb | 1871 | |
2eec3b4e | 1872 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1873 | { |
2eec3b4e RS |
1874 | /* OVERLAY needs to be moved. */ |
1875 | int where = OVERLAY_POSITION (beg); | |
1876 | Lisp_Object other, other_prev; | |
1877 | ||
1878 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1879 | if (!NILP (prev)) | |
1880 | XCONS (prev)->cdr = next; | |
1881 | else | |
5c4f68f1 | 1882 | buf->overlays_before = next; |
2eec3b4e RS |
1883 | |
1884 | /* Search thru overlays_after for where to put it. */ | |
1885 | other_prev = Qnil; | |
5c4f68f1 | 1886 | for (other = buf->overlays_after; |
2eec3b4e RS |
1887 | CONSP (other); |
1888 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1889 | { |
2eec3b4e RS |
1890 | Lisp_Object otherbeg, otheroverlay, follower; |
1891 | int win; | |
1892 | ||
1893 | otheroverlay = XCONS (other)->car; | |
1894 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1895 | abort (); |
2eec3b4e RS |
1896 | |
1897 | otherbeg = OVERLAY_START (otheroverlay); | |
1898 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1899 | break; | |
1ab256cb | 1900 | } |
2eec3b4e RS |
1901 | |
1902 | /* Add TAIL to overlays_after before OTHER. */ | |
1903 | XCONS (tail)->cdr = other; | |
1904 | if (!NILP (other_prev)) | |
1905 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1906 | else |
5c4f68f1 | 1907 | buf->overlays_after = tail; |
2eec3b4e | 1908 | tail = prev; |
1ab256cb | 1909 | } |
2eec3b4e RS |
1910 | else |
1911 | /* We've reached the things that should stay in overlays_before. | |
1912 | All the rest of overlays_before must end even earlier, | |
1913 | so stop now. */ | |
1914 | break; | |
1915 | } | |
1916 | ||
1917 | /* See if anything in overlays_after should be in overlays_before. */ | |
1918 | prev = Qnil; | |
5c4f68f1 | 1919 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1920 | CONSP (tail); |
1921 | prev = tail, tail = next) | |
1922 | { | |
1923 | next = XCONS (tail)->cdr; | |
1924 | overlay = XCONS (tail)->car; | |
1925 | ||
1926 | /* If the overlay is not valid, get rid of it. */ | |
1927 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1928 | #if 1 |
1929 | abort (); | |
1930 | #else | |
2eec3b4e RS |
1931 | { |
1932 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1933 | if (!NILP (prev)) | |
1934 | XCONS (prev)->cdr = next; | |
1935 | else | |
5c4f68f1 | 1936 | buf->overlays_after = next; |
2eec3b4e RS |
1937 | tail = prev; |
1938 | continue; | |
1939 | } | |
52f8ec73 | 1940 | #endif |
2eec3b4e RS |
1941 | |
1942 | beg = OVERLAY_START (overlay); | |
1943 | end = OVERLAY_END (overlay); | |
1944 | ||
1945 | /* Stop looking, when we know that nothing further | |
1946 | can possibly end before POS. */ | |
1947 | if (OVERLAY_POSITION (beg) > pos) | |
1948 | break; | |
1949 | ||
1950 | if (OVERLAY_POSITION (end) <= pos) | |
1951 | { | |
1952 | /* OVERLAY needs to be moved. */ | |
1953 | int where = OVERLAY_POSITION (end); | |
1954 | Lisp_Object other, other_prev; | |
1955 | ||
1956 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1957 | if (!NILP (prev)) | |
1958 | XCONS (prev)->cdr = next; | |
1959 | else | |
5c4f68f1 | 1960 | buf->overlays_after = next; |
2eec3b4e RS |
1961 | |
1962 | /* Search thru overlays_before for where to put it. */ | |
1963 | other_prev = Qnil; | |
5c4f68f1 | 1964 | for (other = buf->overlays_before; |
2eec3b4e RS |
1965 | CONSP (other); |
1966 | other_prev = other, other = XCONS (other)->cdr) | |
1967 | { | |
1968 | Lisp_Object otherend, otheroverlay; | |
1969 | int win; | |
1970 | ||
1971 | otheroverlay = XCONS (other)->car; | |
1972 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1973 | abort (); |
2eec3b4e RS |
1974 | |
1975 | otherend = OVERLAY_END (otheroverlay); | |
1976 | if (OVERLAY_POSITION (otherend) <= where) | |
1977 | break; | |
1978 | } | |
1979 | ||
1980 | /* Add TAIL to overlays_before before OTHER. */ | |
1981 | XCONS (tail)->cdr = other; | |
1982 | if (!NILP (other_prev)) | |
1983 | XCONS (other_prev)->cdr = tail; | |
1984 | else | |
5c4f68f1 | 1985 | buf->overlays_before = tail; |
2eec3b4e RS |
1986 | tail = prev; |
1987 | } | |
1988 | } | |
1989 | ||
8d7a4592 | 1990 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 1991 | } |
2b1bdf65 KH |
1992 | |
1993 | /* Fix up overlays that were garbled as a result of permuting markers | |
1994 | in the range START through END. Any overlay with at least one | |
1995 | endpoint in this range will need to be unlinked from the overlay | |
1996 | list and reinserted in its proper place. | |
1997 | Such an overlay might even have negative size at this point. | |
1998 | If so, we'll reverse the endpoints. Can you think of anything | |
1999 | better to do in this situation? */ | |
2000 | void | |
2001 | fix_overlays_in_range (start, end) | |
2002 | register int start, end; | |
2003 | { | |
2004 | Lisp_Object tem, overlay; | |
2005 | Lisp_Object before_list, after_list; | |
2006 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
2007 | int startpos, endpos; | |
2008 | ||
2009 | /* This algorithm shifts links around instead of consing and GCing. | |
2010 | The loop invariant is that before_list (resp. after_list) is a | |
2011 | well-formed list except that its last element, the one that | |
2012 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
2013 | So it's not a bug that before_list isn't initialized, although | |
2014 | it may look strange. */ | |
2015 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
2016 | { | |
2017 | overlay = XCONS (*ptail)->car; | |
2018 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2019 | if (endpos < start) | |
2020 | break; | |
2021 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2022 | if (endpos < end | |
2023 | || (startpos >= start && startpos < end)) | |
2024 | { | |
2025 | /* If the overlay is backwards, fix that now. */ | |
2026 | if (startpos > endpos) | |
2027 | { | |
2028 | int tem; | |
2029 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2030 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2031 | tem = startpos; startpos = endpos; endpos = tem; | |
2032 | } | |
2033 | /* Add it to the end of the wrong list. Later on, | |
2034 | recenter_overlay_lists will move it to the right place. */ | |
2035 | if (endpos < XINT (current_buffer->overlay_center)) | |
2036 | { | |
2037 | *pafter = *ptail; | |
2038 | pafter = &XCONS (*ptail)->cdr; | |
2039 | } | |
2040 | else | |
2041 | { | |
2042 | *pbefore = *ptail; | |
2043 | pbefore = &XCONS (*ptail)->cdr; | |
2044 | } | |
2045 | *ptail = XCONS (*ptail)->cdr; | |
2046 | } | |
2047 | else | |
2048 | ptail = &XCONS (*ptail)->cdr; | |
2049 | } | |
2050 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
2051 | { | |
2052 | overlay = XCONS (*ptail)->car; | |
2053 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2054 | if (startpos >= end) | |
2055 | break; | |
2056 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2057 | if (startpos >= start | |
2058 | || (endpos >= start && endpos < end)) | |
2059 | { | |
2060 | if (startpos > endpos) | |
2061 | { | |
2062 | int tem; | |
2063 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2064 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2065 | tem = startpos; startpos = endpos; endpos = tem; | |
2066 | } | |
2067 | if (endpos < XINT (current_buffer->overlay_center)) | |
2068 | { | |
2069 | *pafter = *ptail; | |
2070 | pafter = &XCONS (*ptail)->cdr; | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | *pbefore = *ptail; | |
2075 | pbefore = &XCONS (*ptail)->cdr; | |
2076 | } | |
2077 | *ptail = XCONS (*ptail)->cdr; | |
2078 | } | |
2079 | else | |
2080 | ptail = &XCONS (*ptail)->cdr; | |
2081 | } | |
2082 | ||
2083 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
2084 | and let the recenter function make it sane again. */ | |
2085 | *pbefore = current_buffer->overlays_before; | |
2086 | current_buffer->overlays_before = before_list; | |
2087 | recenter_overlay_lists (current_buffer, | |
2088 | XINT (current_buffer->overlay_center)); | |
2089 | ||
2090 | *pafter = current_buffer->overlays_after; | |
2091 | current_buffer->overlays_after = after_list; | |
2092 | recenter_overlay_lists (current_buffer, | |
2093 | XINT (current_buffer->overlay_center)); | |
2094 | } | |
2eec3b4e | 2095 | \f |
52f8ec73 JB |
2096 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
2097 | "Return t if OBJECT is an overlay.") | |
2098 | (object) | |
2099 | Lisp_Object object; | |
2100 | { | |
2101 | return (OVERLAYP (object) ? Qt : Qnil); | |
2102 | } | |
2103 | ||
5c4f68f1 JB |
2104 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
2105 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
2106 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 2107 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
2108 | (beg, end, buffer) |
2109 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
2110 | { |
2111 | Lisp_Object overlay; | |
5c4f68f1 | 2112 | struct buffer *b; |
2eec3b4e | 2113 | |
5c4f68f1 | 2114 | if (NILP (buffer)) |
67180c6a | 2115 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
2116 | else |
2117 | CHECK_BUFFER (buffer, 2); | |
2118 | if (MARKERP (beg) | |
2119 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2120 | error ("Marker points into wrong buffer"); | |
2121 | if (MARKERP (end) | |
2122 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2123 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 2124 | |
883047b9 JB |
2125 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2126 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 2127 | |
883047b9 | 2128 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 2129 | { |
c99fc30f KH |
2130 | Lisp_Object temp; |
2131 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 2132 | } |
883047b9 JB |
2133 | |
2134 | b = XBUFFER (buffer); | |
2135 | ||
2136 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
2137 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 2138 | |
48e2e3ba KH |
2139 | overlay = allocate_misc (); |
2140 | XMISC (overlay)->type = Lisp_Misc_Overlay; | |
2141 | XOVERLAY (overlay)->start = beg; | |
2142 | XOVERLAY (overlay)->end = end; | |
2143 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
2144 | |
2145 | /* Put the new overlay on the wrong list. */ | |
2146 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2147 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2148 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2149 | else |
5c4f68f1 | 2150 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2151 | |
2152 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2153 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2154 | |
b61982dd JB |
2155 | /* We don't need to redisplay the region covered by the overlay, because |
2156 | the overlay has no properties at the moment. */ | |
2157 | ||
2eec3b4e RS |
2158 | return overlay; |
2159 | } | |
2160 | ||
5c4f68f1 JB |
2161 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
2162 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
2163 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
2164 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
2165 | buffer.") | |
5c4f68f1 JB |
2166 | (overlay, beg, end, buffer) |
2167 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 2168 | { |
0a4469c9 RS |
2169 | struct buffer *b, *ob; |
2170 | Lisp_Object obuffer; | |
2171 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 2172 | |
52f8ec73 | 2173 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
2174 | if (NILP (buffer)) |
2175 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 2176 | if (NILP (buffer)) |
67180c6a | 2177 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 2178 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
2179 | |
2180 | if (MARKERP (beg) | |
2181 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2182 | error ("Marker points into wrong buffer"); | |
2183 | if (MARKERP (end) | |
2184 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2185 | error ("Marker points into wrong buffer"); | |
2186 | ||
b61982dd JB |
2187 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2188 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
2189 | ||
9d7608b7 KH |
2190 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
2191 | return Fdelete_overlay (overlay); | |
0a4469c9 | 2192 | |
b61982dd JB |
2193 | if (XINT (beg) > XINT (end)) |
2194 | { | |
c99fc30f KH |
2195 | Lisp_Object temp; |
2196 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
2197 | } |
2198 | ||
9d7608b7 KH |
2199 | specbind (Qinhibit_quit, Qt); |
2200 | ||
0a4469c9 | 2201 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 2202 | b = XBUFFER (buffer); |
0a4469c9 | 2203 | ob = XBUFFER (obuffer); |
2eec3b4e | 2204 | |
c82ed728 | 2205 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 2206 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
2207 | { |
2208 | /* Redisplay where the overlay was. */ | |
2209 | if (!NILP (obuffer)) | |
2210 | { | |
2211 | Lisp_Object o_beg; | |
2212 | Lisp_Object o_end; | |
2213 | ||
2214 | o_beg = OVERLAY_START (overlay); | |
2215 | o_end = OVERLAY_END (overlay); | |
2216 | o_beg = OVERLAY_POSITION (o_beg); | |
2217 | o_end = OVERLAY_POSITION (o_end); | |
2218 | ||
efd90478 | 2219 | redisplay_region (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
2220 | } |
2221 | ||
2222 | /* Redisplay where the overlay is going to be. */ | |
efd90478 | 2223 | redisplay_region (b, XINT (beg), XINT (end)); |
50760c4a RS |
2224 | |
2225 | /* Don't limit redisplay to the selected window. */ | |
2226 | windows_or_buffers_changed = 1; | |
2227 | } | |
c82ed728 JB |
2228 | else |
2229 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
2230 | { | |
be8b1c6b RS |
2231 | Lisp_Object o_beg; |
2232 | Lisp_Object o_end; | |
c82ed728 JB |
2233 | int change_beg, change_end; |
2234 | ||
be8b1c6b RS |
2235 | o_beg = OVERLAY_START (overlay); |
2236 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
2237 | o_beg = OVERLAY_POSITION (o_beg); |
2238 | o_end = OVERLAY_POSITION (o_end); | |
2239 | ||
2240 | if (XINT (o_beg) == XINT (beg)) | |
2241 | redisplay_region (b, XINT (o_end), XINT (end)); | |
2242 | else if (XINT (o_end) == XINT (end)) | |
2243 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
2244 | else | |
2245 | { | |
2246 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
2247 | if (XINT (end) > XINT (o_end)) o_end = end; | |
2248 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
2249 | } | |
2250 | } | |
b61982dd | 2251 | |
0a4469c9 RS |
2252 | if (!NILP (obuffer)) |
2253 | { | |
2254 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
2255 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
2256 | } | |
5c4f68f1 JB |
2257 | |
2258 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
2259 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
2260 | |
2261 | /* Put the overlay on the wrong list. */ | |
2262 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2263 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2264 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2265 | else |
5c4f68f1 | 2266 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2267 | |
2268 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2269 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2270 | |
0a4469c9 | 2271 | return unbind_to (count, overlay); |
2eec3b4e RS |
2272 | } |
2273 | ||
2274 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 2275 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 2276 | (overlay) |
5c4f68f1 | 2277 | Lisp_Object overlay; |
2eec3b4e | 2278 | { |
0a4469c9 | 2279 | Lisp_Object buffer; |
5c4f68f1 | 2280 | struct buffer *b; |
0a4469c9 | 2281 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 2282 | |
52f8ec73 JB |
2283 | CHECK_OVERLAY (overlay, 0); |
2284 | ||
0a4469c9 RS |
2285 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2286 | if (NILP (buffer)) | |
2287 | return Qnil; | |
2288 | ||
2289 | b = XBUFFER (buffer); | |
2290 | ||
2291 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
2292 | |
2293 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
2294 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
2295 | ||
b61982dd | 2296 | redisplay_region (b, |
a927f5c9 RS |
2297 | marker_position (OVERLAY_START (overlay)), |
2298 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2299 | |
3ece337a JB |
2300 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
2301 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
2302 | ||
0a4469c9 | 2303 | return unbind_to (count, Qnil); |
2eec3b4e RS |
2304 | } |
2305 | \f | |
8ebafa8d JB |
2306 | /* Overlay dissection functions. */ |
2307 | ||
2308 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
2309 | "Return the position at which OVERLAY starts.") | |
2310 | (overlay) | |
2311 | Lisp_Object overlay; | |
2312 | { | |
2313 | CHECK_OVERLAY (overlay, 0); | |
2314 | ||
2315 | return (Fmarker_position (OVERLAY_START (overlay))); | |
2316 | } | |
2317 | ||
2318 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
2319 | "Return the position at which OVERLAY ends.") | |
2320 | (overlay) | |
2321 | Lisp_Object overlay; | |
2322 | { | |
2323 | CHECK_OVERLAY (overlay, 0); | |
2324 | ||
2325 | return (Fmarker_position (OVERLAY_END (overlay))); | |
2326 | } | |
2327 | ||
2328 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
2329 | "Return the buffer OVERLAY belongs to.") | |
2330 | (overlay) | |
2331 | Lisp_Object overlay; | |
2332 | { | |
2333 | CHECK_OVERLAY (overlay, 0); | |
2334 | ||
2335 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2336 | } | |
2337 | ||
2338 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2339 | "Return a list of the properties on OVERLAY.\n\ | |
2340 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2341 | OVERLAY.") | |
2342 | (overlay) | |
2343 | Lisp_Object overlay; | |
2344 | { | |
2345 | CHECK_OVERLAY (overlay, 0); | |
2346 | ||
48e2e3ba | 2347 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
2348 | } |
2349 | ||
2350 | \f | |
2eec3b4e | 2351 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2352 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2353 | (pos) |
2354 | Lisp_Object pos; | |
2355 | { | |
2356 | int noverlays; | |
2eec3b4e RS |
2357 | Lisp_Object *overlay_vec; |
2358 | int len; | |
2359 | Lisp_Object result; | |
2360 | ||
2361 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2362 | ||
2363 | len = 10; | |
2364 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2365 | ||
2366 | /* Put all the overlays we want in a vector in overlay_vec. | |
2367 | Store the length in len. */ | |
239c932b | 2368 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, NULL); |
2eec3b4e RS |
2369 | |
2370 | /* Make a list of them all. */ | |
2371 | result = Flist (noverlays, overlay_vec); | |
2372 | ||
9ac0d9e0 | 2373 | xfree (overlay_vec); |
2eec3b4e RS |
2374 | return result; |
2375 | } | |
2376 | ||
2377 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
2378 | 1, 1, 0, | |
bbe20e81 KH |
2379 | "Return the next position after POS where an overlay starts or ends.\n\ |
2380 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2381 | (pos) |
2382 | Lisp_Object pos; | |
2383 | { | |
2384 | int noverlays; | |
2385 | int endpos; | |
2386 | Lisp_Object *overlay_vec; | |
2387 | int len; | |
2eec3b4e RS |
2388 | int i; |
2389 | ||
2390 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2391 | ||
2392 | len = 10; | |
2393 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2394 | ||
2395 | /* Put all the overlays we want in a vector in overlay_vec. | |
2396 | Store the length in len. | |
2397 | endpos gets the position where the next overlay starts. */ | |
239c932b | 2398 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos, NULL); |
2eec3b4e RS |
2399 | |
2400 | /* If any of these overlays ends before endpos, | |
2401 | use its ending point instead. */ | |
2402 | for (i = 0; i < noverlays; i++) | |
2403 | { | |
2404 | Lisp_Object oend; | |
2405 | int oendpos; | |
2406 | ||
2407 | oend = OVERLAY_END (overlay_vec[i]); | |
2408 | oendpos = OVERLAY_POSITION (oend); | |
2409 | if (oendpos < endpos) | |
2410 | endpos = oendpos; | |
1ab256cb RM |
2411 | } |
2412 | ||
9ac0d9e0 | 2413 | xfree (overlay_vec); |
2eec3b4e RS |
2414 | return make_number (endpos); |
2415 | } | |
239c932b RS |
2416 | |
2417 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
2418 | Sprevious_overlay_change, 1, 1, 0, | |
2419 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
2420 | If there are no more overlay boundaries after POS, return (point-min).") | |
2421 | (pos) | |
2422 | Lisp_Object pos; | |
2423 | { | |
2424 | int noverlays; | |
2425 | int prevpos; | |
2426 | Lisp_Object *overlay_vec; | |
2427 | int len; | |
2428 | int i; | |
2429 | ||
2430 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2431 | ||
2432 | len = 10; | |
2433 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2434 | ||
2435 | /* Put all the overlays we want in a vector in overlay_vec. | |
2436 | Store the length in len. | |
2437 | prevpos gets the position of an overlay end. */ | |
2438 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, &prevpos); | |
2439 | ||
2440 | /* If any of these overlays starts before endpos, | |
2441 | maybe use its starting point instead. */ | |
2442 | for (i = 0; i < noverlays; i++) | |
2443 | { | |
2444 | Lisp_Object ostart; | |
2445 | int ostartpos; | |
2446 | ||
2447 | ostart = OVERLAY_START (overlay_vec[i]); | |
2448 | ostartpos = OVERLAY_POSITION (ostart); | |
2449 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2450 | prevpos = ostartpos; | |
2451 | } | |
2452 | ||
2453 | xfree (overlay_vec); | |
2454 | return make_number (prevpos); | |
2455 | } | |
2eec3b4e RS |
2456 | \f |
2457 | /* These functions are for debugging overlays. */ | |
2458 | ||
2459 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2460 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2461 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2462 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2463 | Recentering overlays moves overlays between these lists.\n\ |
2464 | The lists you get are copies, so that changing them has no effect.\n\ | |
2465 | However, the overlays you get are the real objects that the buffer uses.") | |
2466 | () | |
2467 | { | |
2468 | Lisp_Object before, after; | |
2469 | before = current_buffer->overlays_before; | |
2470 | if (CONSP (before)) | |
2471 | before = Fcopy_sequence (before); | |
2472 | after = current_buffer->overlays_after; | |
2473 | if (CONSP (after)) | |
2474 | after = Fcopy_sequence (after); | |
2475 | ||
2476 | return Fcons (before, after); | |
2477 | } | |
2478 | ||
2479 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
2480 | "Recenter the overlays of the current buffer around position POS.") | |
2481 | (pos) | |
2482 | Lisp_Object pos; | |
2483 | { | |
2484 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2485 | ||
5c4f68f1 | 2486 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
2487 | return Qnil; |
2488 | } | |
2489 | \f | |
2490 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
2491 | "Get the property of overlay OVERLAY with property name NAME.") | |
2492 | (overlay, prop) | |
2493 | Lisp_Object overlay, prop; | |
2494 | { | |
cab4777e | 2495 | Lisp_Object plist, fallback; |
52f8ec73 JB |
2496 | |
2497 | CHECK_OVERLAY (overlay, 0); | |
2498 | ||
cab4777e RS |
2499 | fallback = Qnil; |
2500 | ||
48e2e3ba | 2501 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2502 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
2503 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
2504 | { | |
2505 | if (EQ (XCONS (plist)->car, prop)) | |
2506 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
2507 | else if (EQ (XCONS (plist)->car, Qcategory)) |
2508 | { | |
2509 | Lisp_Object tem; | |
2510 | tem = Fcar (Fcdr (plist)); | |
2511 | if (SYMBOLP (tem)) | |
2512 | fallback = Fget (tem, prop); | |
2513 | } | |
2eec3b4e | 2514 | } |
52f8ec73 | 2515 | |
cab4777e | 2516 | return fallback; |
2eec3b4e RS |
2517 | } |
2518 | ||
2519 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
2520 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
2521 | (overlay, prop, value) | |
2522 | Lisp_Object overlay, prop, value; | |
2523 | { | |
48e2e3ba | 2524 | Lisp_Object tail, buffer; |
9d7608b7 | 2525 | int changed; |
2eec3b4e | 2526 | |
52f8ec73 | 2527 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 2528 | |
274a9425 RS |
2529 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2530 | ||
48e2e3ba | 2531 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2532 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
2533 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
2534 | if (EQ (XCONS (tail)->car, prop)) |
2535 | { | |
9d7608b7 KH |
2536 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
2537 | XCONS (XCONS (tail)->cdr)->car = value; | |
2538 | goto found; | |
274a9425 | 2539 | } |
9d7608b7 KH |
2540 | /* It wasn't in the list, so add it to the front. */ |
2541 | changed = !NILP (value); | |
48e2e3ba KH |
2542 | XOVERLAY (overlay)->plist |
2543 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
2544 | found: |
2545 | if (! NILP (buffer)) | |
2546 | { | |
2547 | if (changed) | |
2548 | redisplay_region (XBUFFER (buffer), | |
2549 | marker_position (OVERLAY_START (overlay)), | |
2550 | marker_position (OVERLAY_END (overlay))); | |
2551 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
2552 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
2553 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
2554 | Fdelete_overlay (overlay); | |
2555 | } | |
2eec3b4e | 2556 | return value; |
1ab256cb RM |
2557 | } |
2558 | \f | |
173f2a64 RS |
2559 | /* Run the modification-hooks of overlays that include |
2560 | any part of the text in START to END. | |
2561 | Run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
2562 | and the insert-after-hooks of overlay ending at START. |
2563 | ||
2564 | This is called both before and after the modification. | |
2565 | AFTER is nonzero when we call after the modification. | |
2566 | ||
2567 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. */ | |
173f2a64 RS |
2568 | |
2569 | void | |
930a9140 | 2570 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 2571 | Lisp_Object start, end; |
930a9140 RS |
2572 | int after; |
2573 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
2574 | { |
2575 | Lisp_Object prop, overlay, tail; | |
2576 | int insertion = EQ (start, end); | |
55b48893 | 2577 | int tail_copied; |
930a9140 | 2578 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
2579 | |
2580 | overlay = Qnil; | |
2581 | tail = Qnil; | |
930a9140 | 2582 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 2583 | |
55b48893 | 2584 | tail_copied = 0; |
173f2a64 RS |
2585 | for (tail = current_buffer->overlays_before; |
2586 | CONSP (tail); | |
2587 | tail = XCONS (tail)->cdr) | |
2588 | { | |
2589 | int startpos, endpos; | |
be8b1c6b | 2590 | Lisp_Object ostart, oend; |
173f2a64 RS |
2591 | |
2592 | overlay = XCONS (tail)->car; | |
2593 | ||
2594 | ostart = OVERLAY_START (overlay); | |
2595 | oend = OVERLAY_END (overlay); | |
2596 | endpos = OVERLAY_POSITION (oend); | |
2597 | if (XFASTINT (start) > endpos) | |
2598 | break; | |
2599 | startpos = OVERLAY_POSITION (ostart); | |
2600 | if (XFASTINT (end) == startpos && insertion) | |
2601 | { | |
2602 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2603 | if (!NILP (prop)) |
2604 | { | |
2605 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
2606 | if (!tail_copied) |
2607 | tail = Fcopy_sequence (tail); | |
2608 | tail_copied = 1; | |
930a9140 | 2609 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2610 | } |
173f2a64 RS |
2611 | } |
2612 | if (XFASTINT (start) == endpos && insertion) | |
2613 | { | |
2614 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2615 | if (!NILP (prop)) |
2616 | { | |
55b48893 RS |
2617 | if (!tail_copied) |
2618 | tail = Fcopy_sequence (tail); | |
2619 | tail_copied = 1; | |
930a9140 | 2620 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2621 | } |
173f2a64 | 2622 | } |
3bd13e92 KH |
2623 | /* Test for intersecting intervals. This does the right thing |
2624 | for both insertion and deletion. */ | |
2625 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2626 | { |
2627 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2628 | if (!NILP (prop)) |
2629 | { | |
55b48893 RS |
2630 | if (!tail_copied) |
2631 | tail = Fcopy_sequence (tail); | |
2632 | tail_copied = 1; | |
930a9140 | 2633 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2634 | } |
173f2a64 RS |
2635 | } |
2636 | } | |
2637 | ||
55b48893 | 2638 | tail_copied = 0; |
173f2a64 RS |
2639 | for (tail = current_buffer->overlays_after; |
2640 | CONSP (tail); | |
2641 | tail = XCONS (tail)->cdr) | |
2642 | { | |
2643 | int startpos, endpos; | |
be8b1c6b | 2644 | Lisp_Object ostart, oend; |
173f2a64 RS |
2645 | |
2646 | overlay = XCONS (tail)->car; | |
2647 | ||
2648 | ostart = OVERLAY_START (overlay); | |
2649 | oend = OVERLAY_END (overlay); | |
2650 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 2651 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
2652 | if (XFASTINT (end) < startpos) |
2653 | break; | |
2654 | if (XFASTINT (end) == startpos && insertion) | |
2655 | { | |
2656 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2657 | if (!NILP (prop)) |
2658 | { | |
55b48893 RS |
2659 | if (!tail_copied) |
2660 | tail = Fcopy_sequence (tail); | |
2661 | tail_copied = 1; | |
930a9140 | 2662 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2663 | } |
173f2a64 RS |
2664 | } |
2665 | if (XFASTINT (start) == endpos && insertion) | |
2666 | { | |
2667 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2668 | if (!NILP (prop)) |
2669 | { | |
55b48893 RS |
2670 | if (!tail_copied) |
2671 | tail = Fcopy_sequence (tail); | |
2672 | tail_copied = 1; | |
930a9140 | 2673 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2674 | } |
173f2a64 | 2675 | } |
3bd13e92 KH |
2676 | /* Test for intersecting intervals. This does the right thing |
2677 | for both insertion and deletion. */ | |
2678 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2679 | { |
2680 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2681 | if (!NILP (prop)) |
2682 | { | |
55b48893 RS |
2683 | if (!tail_copied) |
2684 | tail = Fcopy_sequence (tail); | |
2685 | tail_copied = 1; | |
930a9140 | 2686 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2687 | } |
173f2a64 RS |
2688 | } |
2689 | } | |
55b48893 RS |
2690 | |
2691 | UNGCPRO; | |
173f2a64 RS |
2692 | } |
2693 | ||
2694 | static void | |
930a9140 RS |
2695 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
2696 | Lisp_Object list, overlay; | |
2697 | int after; | |
2698 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 2699 | { |
930a9140 RS |
2700 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
2701 | GCPRO4 (list, arg1, arg2, arg3); | |
173f2a64 RS |
2702 | while (!NILP (list)) |
2703 | { | |
930a9140 RS |
2704 | if (NILP (arg3)) |
2705 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
2706 | else | |
2707 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
2708 | list = Fcdr (list); |
2709 | } | |
2710 | UNGCPRO; | |
2711 | } | |
9d7608b7 KH |
2712 | |
2713 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
2714 | property is set. */ | |
2715 | void | |
2716 | evaporate_overlays (pos) | |
2717 | int pos; | |
2718 | { | |
2719 | Lisp_Object tail, overlay, hit_list; | |
2720 | ||
2721 | hit_list = Qnil; | |
2722 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
2723 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
2724 | tail = XCONS (tail)->cdr) | |
2725 | { | |
2726 | int endpos; | |
2727 | overlay = XCONS (tail)->car; | |
2728 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2729 | if (endpos < pos) | |
2730 | break; | |
2731 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
2732 | && Foverlay_get (overlay, Qevaporate)) | |
2733 | hit_list = Fcons (overlay, hit_list); | |
2734 | } | |
2735 | else | |
2736 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
2737 | tail = XCONS (tail)->cdr) | |
2738 | { | |
2739 | int startpos; | |
889bf329 | 2740 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
2741 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2742 | if (startpos > pos) | |
2743 | break; | |
2744 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
2745 | && Foverlay_get (overlay, Qevaporate)) | |
2746 | hit_list = Fcons (overlay, hit_list); | |
2747 | } | |
2748 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
2749 | Fdelete_overlay (XCONS (hit_list)->car); | |
2750 | } | |
173f2a64 | 2751 | \f |
54dfdeb0 KH |
2752 | /* Somebody has tried to store a value with an unacceptable type |
2753 | into the buffer-local slot with offset OFFSET. */ | |
0fa3ba92 | 2754 | void |
54dfdeb0 KH |
2755 | buffer_slot_type_mismatch (offset) |
2756 | int offset; | |
0fa3ba92 | 2757 | { |
54dfdeb0 | 2758 | Lisp_Object sym; |
0fa3ba92 | 2759 | char *type_name; |
54dfdeb0 | 2760 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
2761 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
2762 | { | |
2763 | case Lisp_Int: type_name = "integers"; break; | |
2764 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 2765 | case Lisp_Symbol: type_name = "symbols"; break; |
0fa3ba92 JB |
2766 | default: |
2767 | abort (); | |
2768 | } | |
2769 | ||
2770 | error ("only %s should be stored in the buffer-local variable %s", | |
54dfdeb0 | 2771 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
2772 | } |
2773 | \f | |
1ab256cb RM |
2774 | init_buffer_once () |
2775 | { | |
2776 | register Lisp_Object tem; | |
2777 | ||
2778 | /* Make sure all markable slots in buffer_defaults | |
2779 | are initialized reasonably, so mark_buffer won't choke. */ | |
2780 | reset_buffer (&buffer_defaults); | |
bcd40520 | 2781 | reset_buffer_local_variables (&buffer_defaults); |
1ab256cb | 2782 | reset_buffer (&buffer_local_symbols); |
bcd40520 | 2783 | reset_buffer_local_variables (&buffer_local_symbols); |
336cd056 RS |
2784 | /* Prevent GC from getting confused. */ |
2785 | buffer_defaults.text = &buffer_defaults.own_text; | |
2786 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
2787 | #ifdef USE_TEXT_PROPERTIES | |
2788 | BUF_INTERVALS (&buffer_defaults) = 0; | |
2789 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
2790 | #endif | |
67180c6a KH |
2791 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
2792 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
2793 | |
2794 | /* Set up the default values of various buffer slots. */ | |
2795 | /* Must do these before making the first buffer! */ | |
2796 | ||
2797 | /* real setup is done in loaddefs.el */ | |
2798 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2799 | buffer_defaults.abbrev_mode = Qnil; | |
2800 | buffer_defaults.overwrite_mode = Qnil; | |
2801 | buffer_defaults.case_fold_search = Qt; | |
2802 | buffer_defaults.auto_fill_function = Qnil; | |
2803 | buffer_defaults.selective_display = Qnil; | |
2804 | #ifndef old | |
2805 | buffer_defaults.selective_display_ellipses = Qt; | |
2806 | #endif | |
2807 | buffer_defaults.abbrev_table = Qnil; | |
2808 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2809 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2810 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2811 | buffer_defaults.overlays_before = Qnil; |
2812 | buffer_defaults.overlays_after = Qnil; | |
8d7a4592 | 2813 | XSETFASTINT (buffer_defaults.overlay_center, 1); |
1ab256cb | 2814 | |
8d7a4592 | 2815 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
2816 | buffer_defaults.truncate_lines = Qnil; |
2817 | buffer_defaults.ctl_arrow = Qt; | |
2818 | ||
f7975d07 | 2819 | #ifdef DOS_NT |
0776cb1b | 2820 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 2821 | #endif |
8d7a4592 KH |
2822 | XSETFASTINT (buffer_defaults.fill_column, 70); |
2823 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 2824 | buffer_defaults.cache_long_line_scans = Qnil; |
1ab256cb RM |
2825 | |
2826 | /* Assign the local-flags to the slots that have default values. | |
2827 | The local flag is a bit that is used in the buffer | |
2828 | to say that it has its own local value for the slot. | |
2829 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2830 | ||
2831 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 2832 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
2833 | |
2834 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2835 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
2836 | XSETINT (buffer_local_flags.filename, -1); |
2837 | XSETINT (buffer_local_flags.directory, -1); | |
2838 | XSETINT (buffer_local_flags.backed_up, -1); | |
2839 | XSETINT (buffer_local_flags.save_length, -1); | |
2840 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
2841 | XSETINT (buffer_local_flags.read_only, -1); | |
2842 | XSETINT (buffer_local_flags.major_mode, -1); | |
2843 | XSETINT (buffer_local_flags.mode_name, -1); | |
2844 | XSETINT (buffer_local_flags.undo_list, -1); | |
2845 | XSETINT (buffer_local_flags.mark_active, -1); | |
8d7a4592 KH |
2846 | |
2847 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
2848 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
2849 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
2850 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
2851 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
2852 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 2853 | #ifndef old |
8d7a4592 | 2854 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 2855 | #endif |
8d7a4592 KH |
2856 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
2857 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
2858 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
2859 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
2860 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
2861 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
2862 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
2863 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); | |
28e969dd | 2864 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); |
f7975d07 | 2865 | #ifdef DOS_NT |
8d7a4592 | 2866 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
54ad07d3 | 2867 | #endif |
1ab256cb RM |
2868 | |
2869 | Vbuffer_alist = Qnil; | |
2870 | current_buffer = 0; | |
2871 | all_buffers = 0; | |
2872 | ||
2873 | QSFundamental = build_string ("Fundamental"); | |
2874 | ||
2875 | Qfundamental_mode = intern ("fundamental-mode"); | |
2876 | buffer_defaults.major_mode = Qfundamental_mode; | |
2877 | ||
2878 | Qmode_class = intern ("mode-class"); | |
2879 | ||
2880 | Qprotected_field = intern ("protected-field"); | |
2881 | ||
2882 | Qpermanent_local = intern ("permanent-local"); | |
2883 | ||
2884 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2885 | ||
2886 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2887 | /* super-magic invisible buffer */ | |
2888 | Vbuffer_alist = Qnil; | |
2889 | ||
ffd56f97 | 2890 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2891 | } |
2892 | ||
2893 | init_buffer () | |
2894 | { | |
2895 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2896 | char *pwd; |
2897 | struct stat dotstat, pwdstat; | |
136351b7 | 2898 | Lisp_Object temp; |
f7975d07 | 2899 | int rc; |
1ab256cb RM |
2900 | |
2901 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2902 | |
2903 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2904 | when PWD is right, and may avoid a fatal error. */ | |
f7975d07 | 2905 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
2381d133 JB |
2906 | && stat (pwd, &pwdstat) == 0 |
2907 | && stat (".", &dotstat) == 0 | |
2908 | && dotstat.st_ino == pwdstat.st_ino | |
2909 | && dotstat.st_dev == pwdstat.st_dev | |
2910 | && strlen (pwd) < MAXPATHLEN) | |
2911 | strcpy (buf, pwd); | |
2912 | else if (getwd (buf) == 0) | |
cf1e6391 | 2913 | fatal ("`getwd' failed: %s\n", buf); |
1ab256cb RM |
2914 | |
2915 | #ifndef VMS | |
2916 | /* Maybe this should really use some standard subroutine | |
2917 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
2918 | rc = strlen (buf); |
2919 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
2920 | { | |
2921 | buf[rc] = DIRECTORY_SEP; | |
2922 | buf[rc + 1] = '\0'; | |
2923 | } | |
1ab256cb RM |
2924 | #endif /* not VMS */ |
2925 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2926 | |
2927 | temp = get_minibuffer (0); | |
2928 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2929 | } |
2930 | ||
2931 | /* initialize the buffer routines */ | |
2932 | syms_of_buffer () | |
2933 | { | |
188d4d11 RM |
2934 | extern Lisp_Object Qdisabled; |
2935 | ||
1ab256cb RM |
2936 | staticpro (&Vbuffer_defaults); |
2937 | staticpro (&Vbuffer_local_symbols); | |
2938 | staticpro (&Qfundamental_mode); | |
2939 | staticpro (&Qmode_class); | |
2940 | staticpro (&QSFundamental); | |
2941 | staticpro (&Vbuffer_alist); | |
2942 | staticpro (&Qprotected_field); | |
2943 | staticpro (&Qpermanent_local); | |
2944 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2945 | staticpro (&Qoverlayp); |
9d7608b7 KH |
2946 | Qevaporate = intern ("evaporate"); |
2947 | staticpro (&Qevaporate); | |
294d215f RS |
2948 | staticpro (&Qmodification_hooks); |
2949 | Qmodification_hooks = intern ("modification-hooks"); | |
2950 | staticpro (&Qinsert_in_front_hooks); | |
2951 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2952 | staticpro (&Qinsert_behind_hooks); | |
2953 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2954 | staticpro (&Qget_file_buffer); |
2955 | Qget_file_buffer = intern ("get-file-buffer"); | |
5985d248 KH |
2956 | Qpriority = intern ("priority"); |
2957 | staticpro (&Qpriority); | |
2958 | Qwindow = intern ("window"); | |
2959 | staticpro (&Qwindow); | |
52f8ec73 JB |
2960 | |
2961 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2962 | |
2963 | Fput (Qprotected_field, Qerror_conditions, | |
2964 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2965 | Fput (Qprotected_field, Qerror_message, | |
2966 | build_string ("Attempt to modify a protected field")); | |
2967 | ||
2968 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
2969 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2970 | ||
2971 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2972 | &buffer_defaults.mode_line_format, | |
2973 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2974 | This is the same as (default-value 'mode-line-format)."); | |
2975 | ||
2976 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2977 | &buffer_defaults.abbrev_mode, | |
2978 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2979 | This is the same as (default-value 'abbrev-mode)."); | |
2980 | ||
2981 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2982 | &buffer_defaults.ctl_arrow, | |
2983 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2984 | This is the same as (default-value 'ctl-arrow)."); | |
2985 | ||
2986 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2987 | &buffer_defaults.truncate_lines, | |
2988 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2989 | This is the same as (default-value 'truncate-lines)."); | |
2990 | ||
2991 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2992 | &buffer_defaults.fill_column, | |
2993 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2994 | This is the same as (default-value 'fill-column)."); | |
2995 | ||
2996 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2997 | &buffer_defaults.left_margin, | |
2998 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2999 | This is the same as (default-value 'left-margin)."); | |
3000 | ||
3001 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
3002 | &buffer_defaults.tab_width, | |
3003 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
3004 | This is the same as (default-value 'tab-width)."); | |
3005 | ||
3006 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
3007 | &buffer_defaults.case_fold_search, | |
3008 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
3009 | This is the same as (default-value 'case-fold-search)."); | |
3010 | ||
f7975d07 | 3011 | #ifdef DOS_NT |
54ad07d3 RS |
3012 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
3013 | &buffer_defaults.buffer_file_type, | |
3014 | "Default file type for buffers that do not override it.\n\ | |
3015 | This is the same as (default-value 'buffer-file-type).\n\ | |
3016 | The file type is nil for text, t for binary."); | |
3017 | #endif | |
3018 | ||
0fa3ba92 JB |
3019 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
3020 | Qnil, 0); | |
1ab256cb RM |
3021 | |
3022 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
3023 | But make-docfile finds it! | |
3024 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 3025 | Qnil, |
1ab256cb RM |
3026 | "Template for displaying mode line for current buffer.\n\ |
3027 | Each buffer has its own value of this variable.\n\ | |
3028 | Value may be a string, a symbol or a list or cons cell.\n\ | |
3029 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
3030 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
3031 | in that the %-constructs below are not recognized.\n\ | |
3032 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
3033 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
3034 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
3035 | For a list whose car is a string or list, each element is processed\n\ | |
3036 | recursively and the results are effectively concatenated.\n\ | |
3037 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
3038 | and padded (if the number is positive) or truncated (if negative)\n\ | |
3039 | to the width specified by that number.\n\ | |
3040 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
3041 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
3042 | or when it is found in a cons-cell or a list)\n\ | |
3043 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
3044 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
3045 | % means buffer is read-only and * means it is modified.\n\ | |
3046 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 3047 | %s -- print process status. %l -- print the current line number.\n\ |
dd24e6a6 | 3048 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 3049 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 3050 | or print Bottom or All.\n\ |
1ab256cb | 3051 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 3052 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
3053 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
3054 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
3055 | Decimal digits after the % specify field width to which to pad."); | |
3056 | */ | |
3057 | ||
3058 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
3059 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
3060 | nil here means use current buffer's major mode."); | |
3061 | ||
3062 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 3063 | make_number (Lisp_Symbol), |
1ab256cb RM |
3064 | "Symbol for current buffer's major mode."); |
3065 | ||
3066 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 3067 | make_number (Lisp_String), |
1ab256cb RM |
3068 | "Pretty name of current buffer's major mode (a string)."); |
3069 | ||
0fa3ba92 | 3070 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
3071 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
3072 | Automatically becomes buffer-local when set in any fashion."); | |
3073 | ||
3074 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 3075 | Qnil, |
1ab256cb RM |
3076 | "*Non-nil if searches should ignore case.\n\ |
3077 | Automatically becomes buffer-local when set in any fashion."); | |
3078 | ||
3079 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 3080 | make_number (Lisp_Int), |
1ab256cb RM |
3081 | "*Column beyond which automatic line-wrapping should happen.\n\ |
3082 | Automatically becomes buffer-local when set in any fashion."); | |
3083 | ||
3084 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 3085 | make_number (Lisp_Int), |
1ab256cb RM |
3086 | "*Column for the default indent-line-function to indent to.\n\ |
3087 | Linefeed indents to this column in Fundamental mode.\n\ | |
3088 | Automatically becomes buffer-local when set in any fashion."); | |
3089 | ||
3090 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 3091 | make_number (Lisp_Int), |
1ab256cb RM |
3092 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
3093 | Automatically becomes buffer-local when set in any fashion."); | |
3094 | ||
0fa3ba92 | 3095 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
3096 | "*Non-nil means display control chars with uparrow.\n\ |
3097 | Nil means use backslash and octal digits.\n\ | |
3098 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3099 | This variable does not apply to characters whose display is specified\n\ | |
3100 | in the current display table (if there is one)."); | |
3101 | ||
0fa3ba92 | 3102 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
3103 | "*Non-nil means do not display continuation lines;\n\ |
3104 | give each line of text one screen line.\n\ | |
3105 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3106 | \n\ | |
3107 | Note that this is overridden by the variable\n\ | |
3108 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 3109 | and this buffer is not full-frame width."); |
1ab256cb | 3110 | |
f7975d07 | 3111 | #ifdef DOS_NT |
54ad07d3 RS |
3112 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
3113 | Qnil, | |
006d3d34 RS |
3114 | "Non-nil if the visited file is a binary file.\n\ |
3115 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
3116 | On those systems, it is automatically local in every buffer.\n\ | |
3117 | On other systems, this variable is normally always nil.") | |
54ad07d3 RS |
3118 | #endif |
3119 | ||
1ab256cb | 3120 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 3121 | make_number (Lisp_String), |
1ab256cb RM |
3122 | "Name of default directory of current buffer. Should end with slash.\n\ |
3123 | Each buffer has its own value of this variable."); | |
3124 | ||
3125 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 3126 | Qnil, |
1ab256cb RM |
3127 | "Function called (if non-nil) to perform auto-fill.\n\ |
3128 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
3129 | Each buffer has its own value of this variable.\n\ | |
3130 | NOTE: This variable is not an ordinary hook;\n\ | |
3131 | It may not be a list of functions."); | |
3132 | ||
3133 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 3134 | make_number (Lisp_String), |
1ab256cb RM |
3135 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
3136 | Each buffer has its own value of this variable."); | |
3137 | ||
3138 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 3139 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 3140 | make_number (Lisp_String), |
1ab256cb RM |
3141 | "Name of file for auto-saving current buffer,\n\ |
3142 | or nil if buffer should not be auto-saved.\n\ | |
3143 | Each buffer has its own value of this variable."); | |
3144 | ||
0fa3ba92 | 3145 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
3146 | "Non-nil if this buffer is read-only.\n\ |
3147 | Each buffer has its own value of this variable."); | |
3148 | ||
0fa3ba92 | 3149 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
3150 | "Non-nil if this buffer's file has been backed up.\n\ |
3151 | Backing up is done before the first time the file is saved.\n\ | |
3152 | Each buffer has its own value of this variable."); | |
3153 | ||
3154 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 3155 | make_number (Lisp_Int), |
1ab256cb RM |
3156 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
3157 | 0 initially.\n\ | |
3158 | Each buffer has its own value of this variable."); | |
3159 | ||
3160 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 3161 | Qnil, |
1ab256cb RM |
3162 | "Non-nil enables selective display:\n\ |
3163 | Integer N as value means display only lines\n\ | |
3164 | that start with less than n columns of space.\n\ | |
3165 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
3166 | Then ^M's in the file are written into files as newlines.\n\n\ | |
3167 | Automatically becomes buffer-local when set in any fashion."); | |
3168 | ||
3169 | #ifndef old | |
3170 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
3171 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 3172 | Qnil, |
1ab256cb RM |
3173 | "t means display ... on previous line when a line is invisible.\n\ |
3174 | Automatically becomes buffer-local when set in any fashion."); | |
3175 | #endif | |
3176 | ||
0fa3ba92 | 3177 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 3178 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
3179 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
3180 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 3181 | until the tab is filled in.\n\ |
6bbb0d4a | 3182 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
3183 | Automatically becomes buffer-local when set in any fashion."); |
3184 | ||
54939090 RS |
3185 | #if 0 /* The doc string is too long for some compilers, |
3186 | but make-docfile can find it in this comment. */ | |
1ab256cb | 3187 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 3188 | Qnil, |
1ab256cb RM |
3189 | "Display table that controls display of the contents of current buffer.\n\ |
3190 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3191 | The display table is a vector created with `make-display-table'.\n\ | |
3192 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 3193 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 3194 | nil means display the character in the default fashion.\n\ |
a45e35e1 | 3195 | The remaining six elements control the display of\n\ |
6158b3b0 JB |
3196 | the end of a truncated screen line (element 256, a single character);\n\ |
3197 | the end of a continued line (element 257, a single character);\n\ | |
3198 | the escape character used to display character codes in octal\n\ | |
3199 | (element 258, a single character);\n\ | |
3200 | the character used as an arrow for control characters (element 259,\n\ | |
3201 | a single character);\n\ | |
3202 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
a45e35e1 JB |
3203 | a vector of characters);\n\ |
3204 | the character used to draw the border between side-by-side windows\n\ | |
3402827c | 3205 | (element 261, a single character).\n\ |
1ab256cb RM |
3206 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
3207 | Each window can have its own, overriding display table."); | |
54939090 RS |
3208 | #endif |
3209 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 3210 | Qnil, 0); |
1ab256cb | 3211 | |
1ab256cb RM |
3212 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
3213 | "Don't ask."); | |
3214 | */ | |
01050cb5 | 3215 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
3216 | "Function to call before each text change.\n\ |
3217 | Two arguments are passed to the function: the positions of\n\ | |
3218 | the beginning and end of the range of old text to be changed.\n\ | |
3219 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3220 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 3221 | \n\ |
5f079267 | 3222 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
3223 | don't call any before-change or after-change functions.\n\ |
3224 | That's because these variables are temporarily set to nil.\n\ | |
3225 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3226 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3227 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3228 | Vbefore_change_function = Qnil; |
3229 | ||
3230 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
3231 | "Function to call after each text change.\n\ | |
3232 | Three arguments are passed to the function: the positions of\n\ | |
3233 | the beginning and end of the range of changed text,\n\ | |
3234 | and the length of the pre-change text replaced by that range.\n\ | |
3235 | \(For an insertion, the pre-change length is zero;\n\ | |
3236 | for a deletion, that length is the number of characters deleted,\n\ | |
3237 | and the post-change beginning and end are at the same place.)\n\ | |
3238 | \n\ | |
5f079267 | 3239 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
3240 | don't call any before-change or after-change functions.\n\ |
3241 | That's because these variables are temporarily set to nil.\n\ | |
3242 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3243 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3244 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3245 | Vafter_change_function = Qnil; |
3246 | ||
5f079267 RS |
3247 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
3248 | "List of functions to call before each text change.\n\ | |
3249 | Two arguments are passed to each function: the positions of\n\ | |
3250 | the beginning and end of the range of old text to be changed.\n\ | |
3251 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3252 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
3253 | \n\ |
3254 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
3255 | don't call any before-change or after-change functions.\n\ |
3256 | That's because these variables are temporarily set to nil.\n\ | |
3257 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3258 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3259 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
3260 | Vbefore_change_functions = Qnil; |
3261 | ||
3262 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
3263 | "List of function to call after each text change.\n\ | |
3264 | Three arguments are passed to each function: the positions of\n\ | |
3265 | the beginning and end of the range of changed text,\n\ | |
3266 | and the length of the pre-change text replaced by that range.\n\ | |
3267 | \(For an insertion, the pre-change length is zero;\n\ | |
3268 | for a deletion, that length is the number of characters deleted,\n\ | |
3269 | and the post-change beginning and end are at the same place.)\n\ | |
3270 | \n\ | |
3271 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
3272 | don't call any before-change or after-change functions.\n\ |
3273 | That's because these variables are temporarily set to nil.\n\ | |
3274 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3275 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3276 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 3277 | |
5f079267 RS |
3278 | Vafter_change_functions = Qnil; |
3279 | ||
dbc4e1c1 JB |
3280 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
3281 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
3282 | The functions are run using the `run-hooks' function."); | |
3283 | Vfirst_change_hook = Qnil; | |
3284 | Qfirst_change_hook = intern ("first-change-hook"); | |
3285 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 3286 | |
54939090 RS |
3287 | #if 0 /* The doc string is too long for some compilers, |
3288 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 3289 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
3290 | "List of undo entries in current buffer.\n\ |
3291 | Recent changes come first; older changes follow newer.\n\ | |
3292 | \n\ | |
3293 | An entry (START . END) represents an insertion which begins at\n\ | |
3294 | position START and ends at position END.\n\ | |
3295 | \n\ | |
3296 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
3297 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
3298 | of the text being deleted; if negative, point was at the end.\n\ | |
3299 | \n\ | |
3300 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
3301 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
3302 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
3303 | modification count of the most recent save is different, this entry is\n\ | |
3304 | obsolete.\n\ | |
3305 | \n\ | |
483c1fd3 RS |
3306 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
3307 | was modified between BEG and END. PROP is the property name,\n\ | |
3308 | and VAL is the old value.\n\ | |
3309 | \n\ | |
bec44fd6 JB |
3310 | An entry of the form POSITION indicates that point was at the buffer\n\ |
3311 | location given by the integer. Undoing an entry of this form places\n\ | |
3312 | point at POSITION.\n\ | |
3313 | \n\ | |
1ab256cb RM |
3314 | nil marks undo boundaries. The undo command treats the changes\n\ |
3315 | between two undo boundaries as a single step to be undone.\n\ | |
3316 | \n\ | |
bec44fd6 | 3317 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
3318 | #endif |
3319 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 3320 | 0); |
1ab256cb | 3321 | |
c48f61ef RS |
3322 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
3323 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
3324 | Automatically local in all buffers."); | |
3325 | ||
28e969dd | 3326 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
3327 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
3328 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 3329 | \n\ |
f0c5b712 JB |
3330 | Normally, the line-motion functions work by scanning the buffer for\n\ |
3331 | newlines. Columnar operations (like move-to-column and\n\ | |
3332 | compute-motion) also work by scanning the buffer, summing character\n\ | |
3333 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 3334 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
3335 | motion functions will take longer to execute. Emacs may also take\n\ |
3336 | longer to update the display.\n\ | |
28e969dd | 3337 | \n\ |
f0c5b712 JB |
3338 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
3339 | results of their scans, and consult the cache to avoid rescanning\n\ | |
3340 | regions of the buffer until the text is modified. The caches are most\n\ | |
3341 | beneficial when they prevent the most searching---that is, when the\n\ | |
3342 | buffer contains long lines and large regions of characters with the\n\ | |
3343 | same, fixed screen width.\n\ | |
28e969dd | 3344 | \n\ |
f0c5b712 JB |
3345 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
3346 | become slightly slower (because of the overhead of consulting the\n\ | |
3347 | cache), and the caches will use memory roughly proportional to the\n\ | |
3348 | number of newlines and characters whose screen width varies.\n\ | |
3349 | \n\ | |
3350 | The caches require no explicit maintenance; their accuracy is\n\ | |
3351 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
3352 | the cache should not affect the behavior of any of the motion\n\ | |
3353 | functions; it should only affect their performance."); | |
28e969dd | 3354 | |
c48f61ef RS |
3355 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
3356 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
3357 | Vtransient_mark_mode = Qnil; | |
3358 | ||
0a4469c9 | 3359 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
3360 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
3361 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
3362 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
3363 | and disregard a `read-only' text property if the property value\n\ | |
3364 | is a member of the list."); | |
3365 | Vinhibit_read_only = Qnil; | |
3366 | ||
dcdffbf6 RS |
3367 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
3368 | "List of functions called with no args to query before killing a buffer."); | |
3369 | Vkill_buffer_query_functions = Qnil; | |
3370 | ||
1ab256cb RM |
3371 | defsubr (&Sbuffer_list); |
3372 | defsubr (&Sget_buffer); | |
3373 | defsubr (&Sget_file_buffer); | |
3374 | defsubr (&Sget_buffer_create); | |
336cd056 | 3375 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 3376 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
3377 | defsubr (&Sbuffer_name); |
3378 | /*defsubr (&Sbuffer_number);*/ | |
3379 | defsubr (&Sbuffer_file_name); | |
336cd056 | 3380 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
3381 | defsubr (&Sbuffer_local_variables); |
3382 | defsubr (&Sbuffer_modified_p); | |
3383 | defsubr (&Sset_buffer_modified_p); | |
3384 | defsubr (&Sbuffer_modified_tick); | |
3385 | defsubr (&Srename_buffer); | |
3386 | defsubr (&Sother_buffer); | |
3387 | defsubr (&Sbuffer_disable_undo); | |
3388 | defsubr (&Sbuffer_enable_undo); | |
3389 | defsubr (&Skill_buffer); | |
3390 | defsubr (&Serase_buffer); | |
a9ee7a59 | 3391 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
3392 | defsubr (&Sswitch_to_buffer); |
3393 | defsubr (&Spop_to_buffer); | |
3394 | defsubr (&Scurrent_buffer); | |
3395 | defsubr (&Sset_buffer); | |
3396 | defsubr (&Sbarf_if_buffer_read_only); | |
3397 | defsubr (&Sbury_buffer); | |
3398 | defsubr (&Slist_buffers); | |
3399 | defsubr (&Skill_all_local_variables); | |
2eec3b4e | 3400 | |
52f8ec73 | 3401 | defsubr (&Soverlayp); |
2eec3b4e RS |
3402 | defsubr (&Smake_overlay); |
3403 | defsubr (&Sdelete_overlay); | |
3404 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
3405 | defsubr (&Soverlay_start); |
3406 | defsubr (&Soverlay_end); | |
3407 | defsubr (&Soverlay_buffer); | |
3408 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
3409 | defsubr (&Soverlays_at); |
3410 | defsubr (&Snext_overlay_change); | |
239c932b | 3411 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
3412 | defsubr (&Soverlay_recenter); |
3413 | defsubr (&Soverlay_lists); | |
3414 | defsubr (&Soverlay_get); | |
3415 | defsubr (&Soverlay_put); | |
1ab256cb RM |
3416 | } |
3417 | ||
3418 | keys_of_buffer () | |
3419 | { | |
3420 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
3421 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
3422 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
4158c17d RM |
3423 | |
3424 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
3425 | initialized when that function gets called. */ | |
3426 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 3427 | } |