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" | |
1ab256cb | 37 | #include "indent.h" |
d014bf88 | 38 | #include "blockinput.h" |
1ab256cb RM |
39 | |
40 | struct buffer *current_buffer; /* the current buffer */ | |
41 | ||
42 | /* First buffer in chain of all buffers (in reverse order of creation). | |
43 | Threaded through ->next. */ | |
44 | ||
45 | struct buffer *all_buffers; | |
46 | ||
47 | /* This structure holds the default values of the buffer-local variables | |
48 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
49 | The default value occupies the same slot in this structure | |
50 | as an individual buffer's value occupies in that buffer. | |
51 | Setting the default value also goes through the alist of buffers | |
52 | and stores into each buffer that does not say it has a local value. */ | |
53 | ||
54 | struct buffer buffer_defaults; | |
55 | ||
56 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
57 | ||
58 | static Lisp_Object Vbuffer_defaults; | |
59 | ||
60 | /* This structure marks which slots in a buffer have corresponding | |
61 | default values in buffer_defaults. | |
62 | Each such slot has a nonzero value in this structure. | |
63 | The value has only one nonzero bit. | |
64 | ||
65 | When a buffer has its own local value for a slot, | |
66 | the bit for that slot (found in the same slot in this structure) | |
67 | is turned on in the buffer's local_var_flags slot. | |
68 | ||
69 | If a slot in this structure is -1, then even though there may | |
70 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
71 | and the corresponding slot in buffer_defaults is not used. | |
72 | ||
73 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
74 | but there is a default value which is copied into each buffer. | |
75 | ||
76 | If a slot in this structure is negative, then even though there may | |
77 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
78 | and the corresponding slot in buffer_defaults is not used. | |
79 | ||
80 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
81 | zero, that is a bug */ | |
82 | ||
83 | struct buffer buffer_local_flags; | |
84 | ||
85 | /* This structure holds the names of symbols whose values may be | |
86 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
87 | ||
88 | struct buffer buffer_local_symbols; | |
89 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
90 | static Lisp_Object Vbuffer_local_symbols; | |
91 | ||
0fa3ba92 JB |
92 | /* This structure holds the required types for the values in the |
93 | buffer-local slots. If a slot contains Qnil, then the | |
94 | corresponding buffer slot may contain a value of any type. If a | |
95 | slot contains an integer, then prospective values' tags must be | |
96 | equal to that integer. When a tag does not match, the function | |
97 | buffer_slot_type_mismatch will signal an error. */ | |
98 | struct buffer buffer_local_types; | |
99 | ||
1ab256cb | 100 | Lisp_Object Fset_buffer (); |
01050cb5 | 101 | void set_buffer_internal (); |
173f2a64 | 102 | static void call_overlay_mod_hooks (); |
1ab256cb RM |
103 | |
104 | /* Alist of all buffer names vs the buffers. */ | |
105 | /* This used to be a variable, but is no longer, | |
106 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
107 | Lisp_Object Vbuffer_alist; | |
108 | ||
109 | /* Functions to call before and after each text change. */ | |
110 | Lisp_Object Vbefore_change_function; | |
111 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
112 | Lisp_Object Vbefore_change_functions; |
113 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 114 | |
c48f61ef RS |
115 | Lisp_Object Vtransient_mark_mode; |
116 | ||
a96b68f1 RS |
117 | /* t means ignore all read-only text properties. |
118 | A list means ignore such a property if its value is a member of the list. | |
119 | Any non-nil value means ignore buffer-read-only. */ | |
120 | Lisp_Object Vinhibit_read_only; | |
121 | ||
dcdffbf6 RS |
122 | /* List of functions to call that can query about killing a buffer. |
123 | If any of these functions returns nil, we don't kill it. */ | |
124 | Lisp_Object Vkill_buffer_query_functions; | |
125 | ||
dbc4e1c1 JB |
126 | /* List of functions to call before changing an unmodified buffer. */ |
127 | Lisp_Object Vfirst_change_hook; | |
128 | Lisp_Object Qfirst_change_hook; | |
1ab256cb RM |
129 | |
130 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
131 | ||
132 | Lisp_Object Qprotected_field; | |
133 | ||
134 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
135 | ||
136 | Lisp_Object Qkill_buffer_hook; | |
137 | ||
5fe0b67e RS |
138 | Lisp_Object Qget_file_buffer; |
139 | ||
52f8ec73 JB |
140 | Lisp_Object Qoverlayp; |
141 | ||
9d7608b7 | 142 | Lisp_Object Qpriority, Qwindow, Qevaporate; |
5985d248 | 143 | |
294d215f RS |
144 | Lisp_Object Qmodification_hooks; |
145 | Lisp_Object Qinsert_in_front_hooks; | |
146 | Lisp_Object Qinsert_behind_hooks; | |
147 | ||
1ab256cb RM |
148 | /* For debugging; temporary. See set_buffer_internal. */ |
149 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
150 | ||
151 | nsberror (spec) | |
152 | Lisp_Object spec; | |
153 | { | |
154 | if (XTYPE (spec) == Lisp_String) | |
155 | error ("No buffer named %s", XSTRING (spec)->data); | |
156 | error ("Invalid buffer argument"); | |
157 | } | |
158 | \f | |
159 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
160 | "Return a list of all existing live buffers.") | |
161 | () | |
162 | { | |
163 | return Fmapcar (Qcdr, Vbuffer_alist); | |
164 | } | |
165 | ||
166 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, | |
167 | "Return the buffer named NAME (a string).\n\ | |
168 | If there is no live buffer named NAME, return nil.\n\ | |
169 | NAME may also be a buffer; if so, the value is that buffer.") | |
170 | (name) | |
171 | register Lisp_Object name; | |
172 | { | |
173 | if (XTYPE (name) == Lisp_Buffer) | |
174 | return name; | |
175 | CHECK_STRING (name, 0); | |
176 | ||
177 | return Fcdr (Fassoc (name, Vbuffer_alist)); | |
178 | } | |
179 | ||
180 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
181 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 182 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
1ab256cb RM |
183 | If there is no such live buffer, return nil.") |
184 | (filename) | |
185 | register Lisp_Object filename; | |
186 | { | |
187 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
188 | Lisp_Object handler; |
189 | ||
1ab256cb RM |
190 | CHECK_STRING (filename, 0); |
191 | filename = Fexpand_file_name (filename, Qnil); | |
192 | ||
5fe0b67e RS |
193 | /* If the file name has special constructs in it, |
194 | call the corresponding file handler. */ | |
a617e913 | 195 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
196 | if (!NILP (handler)) |
197 | return call2 (handler, Qget_file_buffer, filename); | |
198 | ||
1ab256cb RM |
199 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
200 | { | |
201 | buf = Fcdr (XCONS (tail)->car); | |
202 | if (XTYPE (buf) != Lisp_Buffer) continue; | |
203 | if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue; | |
204 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); | |
265a9e55 | 205 | if (!NILP (tem)) |
1ab256cb RM |
206 | return buf; |
207 | } | |
208 | return Qnil; | |
209 | } | |
210 | ||
211 | /* Incremented for each buffer created, to assign the buffer number. */ | |
212 | int buffer_count; | |
213 | ||
214 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
215 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
216 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 217 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
218 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
219 | The value is never nil.") | |
220 | (name) | |
221 | register Lisp_Object name; | |
222 | { | |
223 | register Lisp_Object buf, function, tem; | |
224 | int count = specpdl_ptr - specpdl; | |
225 | register struct buffer *b; | |
226 | ||
227 | buf = Fget_buffer (name); | |
265a9e55 | 228 | if (!NILP (buf)) |
1ab256cb RM |
229 | return buf; |
230 | ||
31cd83e9 KH |
231 | if (XSTRING (name)->size == 0) |
232 | error ("Empty string for buffer name is not allowed"); | |
233 | ||
9ac0d9e0 | 234 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb RM |
235 | |
236 | BUF_GAP_SIZE (b) = 20; | |
9ac0d9e0 | 237 | BLOCK_INPUT; |
1ab256cb | 238 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 239 | UNBLOCK_INPUT; |
1ab256cb RM |
240 | if (! BUF_BEG_ADDR (b)) |
241 | memory_full (); | |
242 | ||
243 | BUF_PT (b) = 1; | |
244 | BUF_GPT (b) = 1; | |
245 | BUF_BEGV (b) = 1; | |
246 | BUF_ZV (b) = 1; | |
247 | BUF_Z (b) = 1; | |
248 | BUF_MODIFF (b) = 1; | |
249 | ||
250 | /* Put this on the chain of all buffers including killed ones. */ | |
251 | b->next = all_buffers; | |
252 | all_buffers = b; | |
253 | ||
254 | b->mark = Fmake_marker (); | |
255 | /*b->number = make_number (++buffer_count);*/ | |
256 | b->name = name; | |
257 | if (XSTRING (name)->data[0] != ' ') | |
258 | b->undo_list = Qnil; | |
259 | else | |
260 | b->undo_list = Qt; | |
261 | ||
262 | reset_buffer (b); | |
bcd40520 | 263 | reset_buffer_local_variables (b); |
1ab256cb RM |
264 | |
265 | /* Put this in the alist of all live buffers. */ | |
266 | XSET (buf, Lisp_Buffer, b); | |
267 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
268 | ||
269 | b->mark = Fmake_marker (); | |
270 | b->markers = Qnil; | |
271 | b->name = name; | |
272 | ||
273 | function = buffer_defaults.major_mode; | |
265a9e55 | 274 | if (NILP (function)) |
1ab256cb RM |
275 | { |
276 | tem = Fget (current_buffer->major_mode, Qmode_class); | |
277 | if (EQ (tem, Qnil)) | |
278 | function = current_buffer->major_mode; | |
279 | } | |
280 | ||
265a9e55 | 281 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1ab256cb RM |
282 | return buf; |
283 | ||
284 | /* To select a nonfundamental mode, | |
285 | select the buffer temporarily and then call the mode function. */ | |
286 | ||
287 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
288 | ||
289 | Fset_buffer (buf); | |
290 | call0 (function); | |
291 | ||
292 | return unbind_to (count, buf); | |
293 | } | |
294 | ||
bcd40520 RS |
295 | /* Reinitialize everything about a buffer except its name and contents |
296 | and local variables. */ | |
1ab256cb RM |
297 | |
298 | void | |
299 | reset_buffer (b) | |
300 | register struct buffer *b; | |
301 | { | |
302 | b->filename = Qnil; | |
303 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; | |
304 | b->modtime = 0; | |
305 | b->save_modified = 1; | |
291026b5 | 306 | XFASTINT (b->save_length) = 0; |
1ab256cb RM |
307 | b->last_window_start = 1; |
308 | b->backed_up = Qnil; | |
309 | b->auto_save_modified = 0; | |
84f6bcba | 310 | b->auto_save_failure_time = -1; |
1ab256cb RM |
311 | b->auto_save_file_name = Qnil; |
312 | b->read_only = Qnil; | |
2eec3b4e RS |
313 | b->overlays_before = Qnil; |
314 | b->overlays_after = Qnil; | |
315 | XFASTINT (b->overlay_center) = 1; | |
dfda7a7f | 316 | b->mark_active = Qnil; |
33f7013e JA |
317 | |
318 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
319 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
1ab256cb RM |
320 | } |
321 | ||
bcd40520 RS |
322 | /* Reset buffer B's local variables info. |
323 | Don't use this on a buffer that has already been in use; | |
324 | it does not treat permanent locals consistently. | |
325 | Instead, use Fkill_all_local_variables. */ | |
326 | ||
c48f61ef | 327 | reset_buffer_local_variables (b) |
1ab256cb RM |
328 | register struct buffer *b; |
329 | { | |
330 | register int offset; | |
331 | ||
332 | /* Reset the major mode to Fundamental, together with all the | |
333 | things that depend on the major mode. | |
334 | default-major-mode is handled at a higher level. | |
335 | We ignore it here. */ | |
336 | b->major_mode = Qfundamental_mode; | |
337 | b->keymap = Qnil; | |
338 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
339 | b->mode_name = QSFundamental; | |
340 | b->minor_modes = Qnil; | |
341 | b->downcase_table = Vascii_downcase_table; | |
342 | b->upcase_table = Vascii_upcase_table; | |
e9edf33c RS |
343 | b->case_canon_table = Vascii_canon_table; |
344 | b->case_eqv_table = Vascii_eqv_table; | |
1ab256cb RM |
345 | #if 0 |
346 | b->sort_table = XSTRING (Vascii_sort_table); | |
347 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
348 | #endif /* 0 */ | |
349 | ||
350 | /* Reset all per-buffer variables to their defaults. */ | |
351 | b->local_var_alist = Qnil; | |
352 | b->local_var_flags = 0; | |
353 | ||
354 | /* For each slot that has a default value, | |
355 | copy that into the slot. */ | |
356 | ||
357 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
358 | offset < sizeof (struct buffer); | |
4d2f1389 RS |
359 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
360 | if (*(EMACS_INT *)(offset + (char *) &buffer_local_flags) > 0 | |
361 | || *(EMACS_INT *)(offset + (char *) &buffer_local_flags) == -2) | |
1ab256cb RM |
362 | *(Lisp_Object *)(offset + (char *)b) = |
363 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
364 | } | |
365 | ||
01050cb5 RM |
366 | /* We split this away from generate-new-buffer, because rename-buffer |
367 | and set-visited-file-name ought to be able to use this to really | |
368 | rename the buffer properly. */ | |
369 | ||
370 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 371 | 1, 2, 0, |
01050cb5 RM |
372 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
373 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 374 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 375 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 376 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 377 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 378 | even if a buffer with that name exists.") |
c273e647 RS |
379 | (name, ignore) |
380 | register Lisp_Object name, ignore; | |
1ab256cb RM |
381 | { |
382 | register Lisp_Object gentemp, tem; | |
383 | int count; | |
384 | char number[10]; | |
385 | ||
386 | CHECK_STRING (name, 0); | |
387 | ||
388 | tem = Fget_buffer (name); | |
265a9e55 | 389 | if (NILP (tem)) |
01050cb5 | 390 | return name; |
1ab256cb RM |
391 | |
392 | count = 1; | |
393 | while (1) | |
394 | { | |
395 | sprintf (number, "<%d>", ++count); | |
396 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 397 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
398 | if (!NILP (tem)) |
399 | return gentemp; | |
1ab256cb | 400 | tem = Fget_buffer (gentemp); |
265a9e55 | 401 | if (NILP (tem)) |
01050cb5 | 402 | return gentemp; |
1ab256cb RM |
403 | } |
404 | } | |
405 | ||
406 | \f | |
407 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
408 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 409 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
410 | (buffer) |
411 | register Lisp_Object buffer; | |
412 | { | |
265a9e55 | 413 | if (NILP (buffer)) |
1ab256cb RM |
414 | return current_buffer->name; |
415 | CHECK_BUFFER (buffer, 0); | |
416 | return XBUFFER (buffer)->name; | |
417 | } | |
418 | ||
419 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
420 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
421 | No argument or nil as argument means use the current buffer.") | |
422 | (buffer) | |
423 | register Lisp_Object buffer; | |
424 | { | |
265a9e55 | 425 | if (NILP (buffer)) |
1ab256cb RM |
426 | return current_buffer->filename; |
427 | CHECK_BUFFER (buffer, 0); | |
428 | return XBUFFER (buffer)->filename; | |
429 | } | |
430 | ||
431 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, | |
432 | Sbuffer_local_variables, 0, 1, 0, | |
433 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
434 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
435 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
436 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
437 | No argument or nil as argument means use current buffer as BUFFER.") | |
438 | (buffer) | |
439 | register Lisp_Object buffer; | |
440 | { | |
441 | register struct buffer *buf; | |
553defa4 | 442 | register Lisp_Object result; |
1ab256cb | 443 | |
265a9e55 | 444 | if (NILP (buffer)) |
1ab256cb RM |
445 | buf = current_buffer; |
446 | else | |
447 | { | |
448 | CHECK_BUFFER (buffer, 0); | |
449 | buf = XBUFFER (buffer); | |
450 | } | |
451 | ||
553defa4 RS |
452 | result = Qnil; |
453 | ||
1ab256cb RM |
454 | { |
455 | /* Reference each variable in the alist in our current buffer. | |
456 | If inquiring about the current buffer, this gets the current values, | |
457 | so store them into the alist so the alist is up to date. | |
458 | If inquiring about some other buffer, this swaps out any values | |
459 | for that buffer, making the alist up to date automatically. */ | |
553defa4 RS |
460 | register Lisp_Object tail; |
461 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 462 | { |
553defa4 RS |
463 | Lisp_Object val, elt; |
464 | ||
465 | elt = XCONS (tail)->car; | |
466 | ||
1ab256cb | 467 | if (buf == current_buffer) |
553defa4 RS |
468 | val = find_symbol_value (XCONS (elt)->car); |
469 | else | |
470 | val = XCONS (elt)->cdr; | |
471 | ||
472 | /* If symbol is unbound, put just the symbol in the list. */ | |
473 | if (EQ (val, Qunbound)) | |
474 | result = Fcons (XCONS (elt)->car, result); | |
475 | /* Otherwise, put (symbol . value) in the list. */ | |
476 | else | |
477 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
478 | } |
479 | } | |
480 | ||
1ab256cb RM |
481 | /* Add on all the variables stored in special slots. */ |
482 | { | |
483 | register int offset, mask; | |
484 | ||
485 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
486 | offset < sizeof (struct buffer); | |
4d2f1389 | 487 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 488 | { |
4d2f1389 | 489 | mask = *(EMACS_INT *)(offset + (char *) &buffer_local_flags); |
1ab256cb RM |
490 | if (mask == -1 || (buf->local_var_flags & mask)) |
491 | if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) | |
492 | == Lisp_Symbol) | |
553defa4 RS |
493 | result = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols), |
494 | *(Lisp_Object *)(offset + (char *)buf)), | |
495 | result); | |
1ab256cb RM |
496 | } |
497 | } | |
553defa4 RS |
498 | |
499 | return result; | |
1ab256cb RM |
500 | } |
501 | ||
502 | \f | |
503 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
504 | 0, 1, 0, | |
505 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
506 | No argument or nil as argument means use current buffer as BUFFER.") | |
507 | (buffer) | |
508 | register Lisp_Object buffer; | |
509 | { | |
510 | register struct buffer *buf; | |
265a9e55 | 511 | if (NILP (buffer)) |
1ab256cb RM |
512 | buf = current_buffer; |
513 | else | |
514 | { | |
515 | CHECK_BUFFER (buffer, 0); | |
516 | buf = XBUFFER (buffer); | |
517 | } | |
518 | ||
519 | return buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil; | |
520 | } | |
521 | ||
522 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
523 | 1, 1, 0, | |
524 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
525 | A non-nil FLAG means mark the buffer modified.") | |
526 | (flag) | |
527 | register Lisp_Object flag; | |
528 | { | |
529 | register int already; | |
530 | register Lisp_Object fn; | |
531 | ||
532 | #ifdef CLASH_DETECTION | |
533 | /* If buffer becoming modified, lock the file. | |
534 | If buffer becoming unmodified, unlock the file. */ | |
535 | ||
536 | fn = current_buffer->filename; | |
265a9e55 | 537 | if (!NILP (fn)) |
1ab256cb RM |
538 | { |
539 | already = current_buffer->save_modified < MODIFF; | |
265a9e55 | 540 | if (!already && !NILP (flag)) |
1ab256cb | 541 | lock_file (fn); |
265a9e55 | 542 | else if (already && NILP (flag)) |
1ab256cb RM |
543 | unlock_file (fn); |
544 | } | |
545 | #endif /* CLASH_DETECTION */ | |
546 | ||
265a9e55 | 547 | current_buffer->save_modified = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
548 | update_mode_lines++; |
549 | return flag; | |
550 | } | |
551 | ||
552 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
553 | 0, 1, 0, | |
554 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
555 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
556 | that buffer is changed. It wraps around occasionally.\n\ | |
557 | No argument or nil as argument means use current buffer as BUFFER.") | |
558 | (buffer) | |
559 | register Lisp_Object buffer; | |
560 | { | |
561 | register struct buffer *buf; | |
265a9e55 | 562 | if (NILP (buffer)) |
1ab256cb RM |
563 | buf = current_buffer; |
564 | else | |
565 | { | |
566 | CHECK_BUFFER (buffer, 0); | |
567 | buf = XBUFFER (buffer); | |
568 | } | |
569 | ||
570 | return make_number (BUF_MODIFF (buf)); | |
571 | } | |
572 | \f | |
01050cb5 | 573 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 574 | "sRename buffer (to new name): \nP", |
1ab256cb | 575 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 576 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 577 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 578 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 579 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
580 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
581 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 582 | This does not change the name of the visited file (if any).") |
3bd779aa RS |
583 | (name, unique) |
584 | register Lisp_Object name, unique; | |
1ab256cb RM |
585 | { |
586 | register Lisp_Object tem, buf; | |
587 | ||
588 | CHECK_STRING (name, 0); | |
d59698c4 RS |
589 | |
590 | if (XSTRING (name)->size == 0) | |
591 | error ("Empty string is invalid as a buffer name"); | |
592 | ||
1ab256cb | 593 | tem = Fget_buffer (name); |
c059b5ea RM |
594 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
595 | the buffer automatically so you can create another with the original name. | |
596 | It makes UNIQUE equivalent to | |
597 | (rename-buffer (generate-new-buffer-name NAME)). */ | |
598 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
01050cb5 | 599 | return current_buffer->name; |
265a9e55 | 600 | if (!NILP (tem)) |
01050cb5 | 601 | { |
3bd779aa | 602 | if (!NILP (unique)) |
c273e647 | 603 | name = Fgenerate_new_buffer_name (name, current_buffer->name); |
01050cb5 RM |
604 | else |
605 | error ("Buffer name \"%s\" is in use", XSTRING (name)->data); | |
606 | } | |
1ab256cb RM |
607 | |
608 | current_buffer->name = name; | |
76f590d7 JB |
609 | |
610 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
611 | any windows displaying current_buffer will stay unchanged. */ | |
612 | update_mode_lines++; | |
613 | ||
1ab256cb RM |
614 | XSET (buf, Lisp_Buffer, current_buffer); |
615 | Fsetcar (Frassq (buf, Vbuffer_alist), name); | |
cf058e49 KH |
616 | if (NILP (current_buffer->filename) |
617 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 618 | call0 (intern ("rename-auto-save-file")); |
cf058e49 KH |
619 | /* refetch since that last call may have done GC */ |
620 | return current_buffer->name; | |
1ab256cb RM |
621 | } |
622 | ||
a0ebb746 | 623 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 624 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
625 | Buffers not visible in windows are preferred to visible buffers,\n\ |
626 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
627 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
628 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
629 | (buffer, visible_ok) |
630 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
631 | { |
632 | register Lisp_Object tail, buf, notsogood, tem; | |
633 | notsogood = Qnil; | |
634 | ||
265a9e55 | 635 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
636 | { |
637 | buf = Fcdr (Fcar (tail)); | |
638 | if (EQ (buf, buffer)) | |
639 | continue; | |
640 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
641 | continue; | |
a0ebb746 | 642 | if (NILP (visible_ok)) |
db732e5a | 643 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
644 | else |
645 | tem = Qnil; | |
265a9e55 | 646 | if (NILP (tem)) |
1ab256cb | 647 | return buf; |
265a9e55 | 648 | if (NILP (notsogood)) |
1ab256cb RM |
649 | notsogood = buf; |
650 | } | |
265a9e55 | 651 | if (!NILP (notsogood)) |
1ab256cb RM |
652 | return notsogood; |
653 | return Fget_buffer_create (build_string ("*scratch*")); | |
654 | } | |
655 | \f | |
5b8bcf48 | 656 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1, |
1ab256cb | 657 | 0, |
5b8bcf48 RS |
658 | "Make BUFFER stop keeping undo information.\n\ |
659 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
660 | (buffer) |
661 | register Lisp_Object buffer; | |
1ab256cb | 662 | { |
ffd56f97 JB |
663 | Lisp_Object real_buffer; |
664 | ||
665 | if (NILP (buffer)) | |
666 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
667 | else | |
668 | { | |
669 | real_buffer = Fget_buffer (buffer); | |
670 | if (NILP (real_buffer)) | |
671 | nsberror (buffer); | |
672 | } | |
673 | ||
674 | XBUFFER (real_buffer)->undo_list = Qt; | |
675 | ||
1ab256cb RM |
676 | return Qnil; |
677 | } | |
678 | ||
679 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
680 | 0, 1, "", | |
681 | "Start keeping undo information for buffer BUFFER.\n\ | |
682 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
683 | (buffer) |
684 | register Lisp_Object buffer; | |
1ab256cb | 685 | { |
ffd56f97 | 686 | Lisp_Object real_buffer; |
1ab256cb | 687 | |
ffd56f97 JB |
688 | if (NILP (buffer)) |
689 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
1ab256cb RM |
690 | else |
691 | { | |
ffd56f97 JB |
692 | real_buffer = Fget_buffer (buffer); |
693 | if (NILP (real_buffer)) | |
694 | nsberror (buffer); | |
1ab256cb RM |
695 | } |
696 | ||
ffd56f97 JB |
697 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
698 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
699 | |
700 | return Qnil; | |
701 | } | |
702 | ||
703 | /* | |
704 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
705 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
706 | The buffer being killed will be current while the hook is running.\n\ | |
707 | See `kill-buffer'." | |
708 | */ | |
709 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
710 | "Kill the buffer BUFFER.\n\ | |
711 | The argument may be a buffer or may be the name of a buffer.\n\ | |
712 | An argument of nil means kill the current buffer.\n\n\ | |
713 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
714 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
715 | if not void, is a list of functions to be called, with no arguments,\n\ | |
716 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
717 | when the hook functions are called.\n\n\ | |
718 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
719 | with `delete-process'.") | |
720 | (bufname) | |
721 | Lisp_Object bufname; | |
722 | { | |
723 | Lisp_Object buf; | |
724 | register struct buffer *b; | |
725 | register Lisp_Object tem; | |
726 | register struct Lisp_Marker *m; | |
727 | struct gcpro gcpro1, gcpro2; | |
728 | ||
265a9e55 | 729 | if (NILP (bufname)) |
1ab256cb RM |
730 | buf = Fcurrent_buffer (); |
731 | else | |
732 | buf = Fget_buffer (bufname); | |
265a9e55 | 733 | if (NILP (buf)) |
1ab256cb RM |
734 | nsberror (bufname); |
735 | ||
736 | b = XBUFFER (buf); | |
737 | ||
738 | /* Query if the buffer is still modified. */ | |
265a9e55 | 739 | if (INTERACTIVE && !NILP (b->filename) |
1ab256cb RM |
740 | && BUF_MODIFF (b) > b->save_modified) |
741 | { | |
742 | GCPRO2 (buf, bufname); | |
743 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
744 | XSTRING (b->name)->data)); | |
745 | UNGCPRO; | |
265a9e55 | 746 | if (NILP (tem)) |
1ab256cb RM |
747 | return Qnil; |
748 | } | |
749 | ||
dcdffbf6 | 750 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
751 | { |
752 | register Lisp_Object val; | |
753 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 754 | Lisp_Object list; |
1ab256cb RM |
755 | |
756 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
757 | set_buffer_internal (b); | |
dcdffbf6 RS |
758 | |
759 | /* First run the query functions; if any query is answered no, | |
760 | don't kill the buffer. */ | |
761 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
762 | { | |
763 | tem = call0 (Fcar (list)); | |
764 | if (NILP (tem)) | |
765 | return unbind_to (count, Qnil); | |
766 | } | |
767 | ||
768 | /* Then run the hooks. */ | |
fd186f07 RS |
769 | if (!NILP (Vrun_hooks)) |
770 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
771 | unbind_to (count, Qnil); |
772 | } | |
773 | ||
774 | /* We have no more questions to ask. Verify that it is valid | |
775 | to kill the buffer. This must be done after the questions | |
776 | since anything can happen within do_yes_or_no_p. */ | |
777 | ||
778 | /* Don't kill the minibuffer now current. */ | |
779 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
780 | return Qnil; | |
781 | ||
265a9e55 | 782 | if (NILP (b->name)) |
1ab256cb RM |
783 | return Qnil; |
784 | ||
785 | /* Make this buffer not be current. | |
786 | In the process, notice if this is the sole visible buffer | |
787 | and give up if so. */ | |
788 | if (b == current_buffer) | |
789 | { | |
172a9c1f | 790 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
791 | Fset_buffer (tem); |
792 | if (b == current_buffer) | |
793 | return Qnil; | |
794 | } | |
795 | ||
796 | /* Now there is no question: we can kill the buffer. */ | |
797 | ||
798 | #ifdef CLASH_DETECTION | |
799 | /* Unlock this buffer's file, if it is locked. */ | |
800 | unlock_buffer (b); | |
801 | #endif /* CLASH_DETECTION */ | |
802 | ||
1ab256cb | 803 | kill_buffer_processes (buf); |
1ab256cb RM |
804 | |
805 | tem = Vinhibit_quit; | |
806 | Vinhibit_quit = Qt; | |
807 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
808 | Freplace_buffer_in_windows (buf); | |
809 | Vinhibit_quit = tem; | |
810 | ||
9b59d6d0 RS |
811 | /* Delete any auto-save file, if we saved it in this session. */ |
812 | if (XTYPE (b->auto_save_file_name) == Lisp_String | |
813 | && b->auto_save_modified != 0) | |
1ab256cb RM |
814 | { |
815 | Lisp_Object tem; | |
816 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 817 | if (! NILP (tem)) |
1ab256cb RM |
818 | unlink (XSTRING (b->auto_save_file_name)->data); |
819 | } | |
820 | ||
821 | /* Unchain all markers of this buffer | |
822 | and leave them pointing nowhere. */ | |
823 | for (tem = b->markers; !EQ (tem, Qnil); ) | |
824 | { | |
825 | m = XMARKER (tem); | |
826 | m->buffer = 0; | |
827 | tem = m->chain; | |
828 | m->chain = Qnil; | |
829 | } | |
830 | b->markers = Qnil; | |
831 | ||
33f7013e JA |
832 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
833 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
834 | /* Perhaps we should explicitly free the interval tree here... */ | |
835 | ||
1ab256cb | 836 | b->name = Qnil; |
9ac0d9e0 | 837 | BLOCK_INPUT; |
1ab256cb | 838 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
9ac0d9e0 | 839 | UNBLOCK_INPUT; |
1ab256cb RM |
840 | b->undo_list = Qnil; |
841 | ||
842 | return Qt; | |
843 | } | |
844 | \f | |
36a8c287 JB |
845 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
846 | we do this each time BUF is selected visibly, the more recently | |
847 | selected buffers are always closer to the front of the list. This | |
848 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
849 | |
850 | record_buffer (buf) | |
851 | Lisp_Object buf; | |
852 | { | |
853 | register Lisp_Object link, prev; | |
854 | ||
855 | prev = Qnil; | |
856 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
857 | { | |
858 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
859 | break; | |
860 | prev = link; | |
861 | } | |
862 | ||
36a8c287 JB |
863 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
864 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 865 | |
265a9e55 | 866 | if (NILP (prev)) |
1ab256cb RM |
867 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
868 | else | |
869 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
870 | ||
871 | XCONS(link)->cdr = Vbuffer_alist; | |
872 | Vbuffer_alist = link; | |
873 | } | |
874 | ||
875 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", | |
876 | "Select buffer BUFFER in the current window.\n\ | |
877 | BUFFER may be a buffer or a buffer name.\n\ | |
878 | Optional second arg NORECORD non-nil means\n\ | |
879 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
880 | \n\ | |
881 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
882 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
883 | the window-buffer correspondences.") | |
884 | (bufname, norecord) | |
885 | Lisp_Object bufname, norecord; | |
886 | { | |
887 | register Lisp_Object buf; | |
888 | Lisp_Object tem; | |
889 | ||
890 | if (EQ (minibuf_window, selected_window)) | |
891 | error ("Cannot switch buffers in minibuffer window"); | |
892 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 893 | if (!NILP (tem)) |
1ab256cb RM |
894 | error ("Cannot switch buffers in a dedicated window"); |
895 | ||
265a9e55 | 896 | if (NILP (bufname)) |
172a9c1f | 897 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
898 | else |
899 | buf = Fget_buffer_create (bufname); | |
900 | Fset_buffer (buf); | |
265a9e55 | 901 | if (NILP (norecord)) |
1ab256cb RM |
902 | record_buffer (buf); |
903 | ||
904 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
905 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
906 | : selected_window, | |
1ab256cb RM |
907 | buf); |
908 | ||
e8b3a22d | 909 | return buf; |
1ab256cb RM |
910 | } |
911 | ||
912 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
913 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
914 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
915 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
916 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
917 | window even if BUFFER is already visible in the selected window.") | |
918 | (bufname, other) | |
919 | Lisp_Object bufname, other; | |
920 | { | |
921 | register Lisp_Object buf; | |
265a9e55 | 922 | if (NILP (bufname)) |
172a9c1f | 923 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
924 | else |
925 | buf = Fget_buffer_create (bufname); | |
926 | Fset_buffer (buf); | |
927 | record_buffer (buf); | |
928 | Fselect_window (Fdisplay_buffer (buf, other)); | |
e8b3a22d | 929 | return buf; |
1ab256cb RM |
930 | } |
931 | ||
932 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
933 | "Return the current buffer as a Lisp object.") | |
934 | () | |
935 | { | |
936 | register Lisp_Object buf; | |
937 | XSET (buf, Lisp_Buffer, current_buffer); | |
938 | return buf; | |
939 | } | |
940 | \f | |
941 | /* Set the current buffer to b */ | |
942 | ||
943 | void | |
944 | set_buffer_internal (b) | |
945 | register struct buffer *b; | |
946 | { | |
947 | register struct buffer *old_buf; | |
948 | register Lisp_Object tail, valcontents; | |
949 | enum Lisp_Type tem; | |
950 | ||
951 | if (current_buffer == b) | |
952 | return; | |
953 | ||
954 | windows_or_buffers_changed = 1; | |
955 | old_buf = current_buffer; | |
956 | current_buffer = b; | |
957 | last_known_column_point = -1; /* invalidate indentation cache */ | |
958 | ||
959 | /* Look down buffer's list of local Lisp variables | |
960 | to find and update any that forward into C variables. */ | |
961 | ||
265a9e55 | 962 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
963 | { |
964 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
965 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
966 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
967 | && (tem = XTYPE (XCONS (valcontents)->car), | |
968 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
969 | || tem == Lisp_Objfwd))) | |
970 | /* Just reference the variable | |
971 | to cause it to become set for this buffer. */ | |
972 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
973 | } | |
974 | ||
975 | /* Do the same with any others that were local to the previous buffer */ | |
976 | ||
977 | if (old_buf) | |
265a9e55 | 978 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
979 | { |
980 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
981 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
982 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
983 | && (tem = XTYPE (XCONS (valcontents)->car), | |
984 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
985 | || tem == Lisp_Objfwd))) | |
986 | /* Just reference the variable | |
987 | to cause it to become set for this buffer. */ | |
988 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
989 | } | |
990 | } | |
991 | ||
992 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, | |
993 | "Make the buffer BUFFER current for editing operations.\n\ | |
994 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
995 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
996 | This function does not display the buffer, so its effect ends\n\ | |
997 | when the current command terminates.\n\ | |
998 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
999 | (bufname) | |
1000 | register Lisp_Object bufname; | |
1001 | { | |
1002 | register Lisp_Object buffer; | |
1003 | buffer = Fget_buffer (bufname); | |
265a9e55 | 1004 | if (NILP (buffer)) |
1ab256cb | 1005 | nsberror (bufname); |
265a9e55 | 1006 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
1007 | error ("Selecting deleted buffer"); |
1008 | set_buffer_internal (XBUFFER (buffer)); | |
1009 | return buffer; | |
1010 | } | |
1011 | \f | |
1012 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1013 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1014 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1015 | () | |
1016 | { | |
a96b68f1 RS |
1017 | if (!NILP (current_buffer->read_only) |
1018 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1019 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1020 | return Qnil; | |
1021 | } | |
1022 | ||
1023 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1024 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1025 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1026 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1027 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1028 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1029 | selected window if it is displayed there.") | |
1ab256cb RM |
1030 | (buf) |
1031 | register Lisp_Object buf; | |
1032 | { | |
b271272a | 1033 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 1034 | if (NILP (buf)) |
a5611885 JB |
1035 | { |
1036 | XSET (buf, Lisp_Buffer, current_buffer); | |
1037 | ||
1038 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 1039 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 1040 | } |
1ab256cb RM |
1041 | else |
1042 | { | |
1043 | Lisp_Object buf1; | |
1044 | ||
1045 | buf1 = Fget_buffer (buf); | |
265a9e55 | 1046 | if (NILP (buf1)) |
1ab256cb RM |
1047 | nsberror (buf); |
1048 | buf = buf1; | |
b271272a JB |
1049 | } |
1050 | ||
a5611885 | 1051 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
1052 | { |
1053 | register Lisp_Object aelt, link; | |
1054 | ||
1055 | aelt = Frassq (buf, Vbuffer_alist); | |
1056 | link = Fmemq (aelt, Vbuffer_alist); | |
1057 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1058 | XCONS (link)->cdr = Qnil; | |
1059 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1060 | } | |
1ab256cb | 1061 | |
1ab256cb RM |
1062 | return Qnil; |
1063 | } | |
1064 | \f | |
c922bc55 | 1065 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1066 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1067 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1068 | so the buffer is truly empty after this.") |
1069 | () | |
1070 | { | |
1071 | Fwiden (); | |
1072 | del_range (BEG, Z); | |
1073 | current_buffer->last_window_start = 1; | |
1074 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1075 | if future size is less than past size. Use of erase-buffer | |
1076 | implies that the future text is not really related to the past text. */ | |
1077 | XFASTINT (current_buffer->save_length) = 0; | |
1078 | return Qnil; | |
1079 | } | |
1080 | ||
1081 | validate_region (b, e) | |
1082 | register Lisp_Object *b, *e; | |
1083 | { | |
1084 | register int i; | |
1085 | ||
1086 | CHECK_NUMBER_COERCE_MARKER (*b, 0); | |
1087 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1088 | ||
1089 | if (XINT (*b) > XINT (*e)) | |
1090 | { | |
1091 | i = XFASTINT (*b); /* This is legit even if *b is < 0 */ | |
1092 | *b = *e; | |
1093 | XFASTINT (*e) = i; /* because this is all we do with i. */ | |
1094 | } | |
1095 | ||
1096 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1097 | && XINT (*e) <= ZV)) | |
1098 | args_out_of_range (*b, *e); | |
1099 | } | |
1100 | \f | |
9f31d21b | 1101 | static Lisp_Object |
1ab256cb RM |
1102 | list_buffers_1 (files) |
1103 | Lisp_Object files; | |
1104 | { | |
1105 | register Lisp_Object tail, tem, buf; | |
1106 | Lisp_Object col1, col2, col3, minspace; | |
1107 | register struct buffer *old = current_buffer, *b; | |
718cde7d | 1108 | Lisp_Object desired_point; |
1ab256cb RM |
1109 | Lisp_Object other_file_symbol; |
1110 | ||
718cde7d | 1111 | desired_point = Qnil; |
1ab256cb RM |
1112 | other_file_symbol = intern ("list-buffers-directory"); |
1113 | ||
1114 | XFASTINT (col1) = 19; | |
06e8cf74 | 1115 | XFASTINT (col2) = 26; |
1ab256cb RM |
1116 | XFASTINT (col3) = 40; |
1117 | XFASTINT (minspace) = 1; | |
1118 | ||
1119 | Fset_buffer (Vstandard_output); | |
1ab256cb RM |
1120 | Fbuffer_disable_undo (Vstandard_output); |
1121 | current_buffer->read_only = Qnil; | |
1122 | ||
1123 | write_string ("\ | |
95e4d536 RS |
1124 | MR Buffer Size Mode File\n\ |
1125 | -- ------ ---- ---- ----\n", -1); | |
1ab256cb | 1126 | |
265a9e55 | 1127 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
1128 | { |
1129 | buf = Fcdr (Fcar (tail)); | |
1130 | b = XBUFFER (buf); | |
1131 | /* Don't mention the minibuffers. */ | |
1132 | if (XSTRING (b->name)->data[0] == ' ') | |
1133 | continue; | |
1134 | /* Optionally don't mention buffers that lack files. */ | |
265a9e55 | 1135 | if (!NILP (files) && NILP (b->filename)) |
1ab256cb RM |
1136 | continue; |
1137 | /* Identify the current buffer. */ | |
1138 | if (b == old) | |
718cde7d | 1139 | XFASTINT (desired_point) = point; |
1ab256cb RM |
1140 | write_string (b == old ? "." : " ", -1); |
1141 | /* Identify modified buffers */ | |
1142 | write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1); | |
265a9e55 | 1143 | write_string (NILP (b->read_only) ? " " : "% ", -1); |
1ab256cb RM |
1144 | Fprinc (b->name, Qnil); |
1145 | Findent_to (col1, make_number (2)); | |
1146 | XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b); | |
1147 | Fprin1 (tem, Qnil); | |
1148 | Findent_to (col2, minspace); | |
1149 | Fprinc (b->mode_name, Qnil); | |
1150 | Findent_to (col3, minspace); | |
1151 | ||
265a9e55 | 1152 | if (!NILP (b->filename)) |
1ab256cb RM |
1153 | Fprinc (b->filename, Qnil); |
1154 | else | |
1155 | { | |
1156 | /* No visited file; check local value of list-buffers-directory. */ | |
1157 | Lisp_Object tem; | |
1158 | set_buffer_internal (b); | |
1159 | tem = Fboundp (other_file_symbol); | |
265a9e55 | 1160 | if (!NILP (tem)) |
1ab256cb RM |
1161 | { |
1162 | tem = Fsymbol_value (other_file_symbol); | |
1163 | Fset_buffer (Vstandard_output); | |
1164 | if (XTYPE (tem) == Lisp_String) | |
1165 | Fprinc (tem, Qnil); | |
1166 | } | |
1167 | else | |
1168 | Fset_buffer (Vstandard_output); | |
1169 | } | |
1170 | write_string ("\n", -1); | |
1171 | } | |
1172 | ||
9f31d21b KH |
1173 | tail = intern ("Buffer-menu-mode"); |
1174 | if ((tem = Ffboundp (tail), !NILP (tem))) | |
1175 | call0 (tail); | |
1ab256cb | 1176 | set_buffer_internal (old); |
718cde7d | 1177 | return desired_point; |
1ab256cb RM |
1178 | } |
1179 | ||
1180 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", | |
1181 | "Display a list of names of existing buffers.\n\ | |
1182 | The list is displayed in a buffer named `*Buffer List*'.\n\ | |
1183 | Note that buffers with names starting with spaces are omitted.\n\ | |
1184 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ | |
1185 | \n\ | |
1186 | The M column contains a * for buffers that are modified.\n\ | |
1187 | The R column contains a % for buffers that are read-only.") | |
1188 | (files) | |
1189 | Lisp_Object files; | |
1190 | { | |
e87f38ef JB |
1191 | Lisp_Object desired_point; |
1192 | ||
fd2dab90 RS |
1193 | desired_point |
1194 | = internal_with_output_to_temp_buffer ("*Buffer List*", | |
1195 | list_buffers_1, files); | |
e87f38ef | 1196 | |
718cde7d JB |
1197 | if (NUMBERP (desired_point)) |
1198 | { | |
1199 | int count = specpdl_ptr - specpdl; | |
1200 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1201 | Fset_buffer (build_string ("*Buffer List*")); | |
1202 | SET_PT (XINT (desired_point)); | |
1203 | return unbind_to (count, Qnil); | |
1204 | } | |
fd2dab90 | 1205 | return Qnil; |
1ab256cb RM |
1206 | } |
1207 | ||
1208 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, | |
1209 | 0, 0, 0, | |
1210 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1211 | Most local variable bindings are eliminated so that the default values\n\ | |
1212 | become effective once more. Also, the syntax table is set from\n\ | |
1213 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1214 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1215 | This function also forces redisplay of the mode line.\n\ | |
1216 | \n\ | |
1217 | Every function to select a new major mode starts by\n\ | |
1218 | calling this function.\n\n\ | |
1219 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1220 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1221 | \n\ | |
1222 | The first thing this function does is run\n\ | |
1223 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1224 | () |
1225 | { | |
1226 | register Lisp_Object alist, sym, tem; | |
1227 | Lisp_Object oalist; | |
7410477a | 1228 | |
fd186f07 RS |
1229 | if (!NILP (Vrun_hooks)) |
1230 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1231 | oalist = current_buffer->local_var_alist; |
1232 | ||
1233 | /* Make sure no local variables remain set up with this buffer | |
1234 | for their current values. */ | |
1235 | ||
265a9e55 | 1236 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1237 | { |
1238 | sym = XCONS (XCONS (alist)->car)->car; | |
1239 | ||
1240 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1241 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car; | |
1242 | if (XBUFFER (tem) == current_buffer) | |
1243 | { | |
1244 | /* Symbol is set up for this buffer's old local value. | |
1245 | Set it up for the current buffer with the default value. */ | |
1246 | ||
1247 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr; | |
542143d7 RS |
1248 | /* Store the symbol's current value into the alist entry |
1249 | it is currently set up for. This is so that, if the | |
1250 | local is marked permanent, and we make it local again below, | |
1251 | we don't lose the value. */ | |
2735b685 RS |
1252 | XCONS (XCONS (tem)->car)->cdr |
1253 | = do_symval_forwarding (XCONS (XSYMBOL (sym)->value)->car); | |
542143d7 | 1254 | /* Switch to the symbol's default-value alist entry. */ |
1ab256cb | 1255 | XCONS (tem)->car = tem; |
542143d7 | 1256 | /* Mark it as current for the current buffer. */ |
1ab256cb | 1257 | XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer (); |
542143d7 | 1258 | /* Store the current value into any forwarding in the symbol. */ |
1ab256cb RM |
1259 | store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car, |
1260 | XCONS (tem)->cdr); | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | /* Actually eliminate all local bindings of this buffer. */ | |
1265 | ||
1266 | reset_buffer_local_variables (current_buffer); | |
1267 | ||
1268 | /* Redisplay mode lines; we are changing major mode. */ | |
1269 | ||
1270 | update_mode_lines++; | |
1271 | ||
1272 | /* Any which are supposed to be permanent, | |
1273 | make local again, with the same values they had. */ | |
1274 | ||
265a9e55 | 1275 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1276 | { |
1277 | sym = XCONS (XCONS (alist)->car)->car; | |
1278 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1279 | if (! NILP (tem)) |
01050cb5 RM |
1280 | { |
1281 | Fmake_local_variable (sym); | |
1282 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1283 | } | |
1ab256cb RM |
1284 | } |
1285 | ||
1286 | /* Force mode-line redisplay. Useful here because all major mode | |
1287 | commands call this function. */ | |
1288 | update_mode_lines++; | |
1289 | ||
1290 | return Qnil; | |
1291 | } | |
1292 | \f | |
2eec3b4e RS |
1293 | /* Find all the overlays in the current buffer that contain position POS. |
1294 | Return the number found, and store them in a vector in *VEC_PTR. | |
1295 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1296 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1297 | or ZV if there are no more overlays. | |
239c932b RS |
1298 | Store in *PREV_PTR the previous position after POS where an overlay ends, |
1299 | or BEGV if there are no previous overlays. | |
1300 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1301 | |
1302 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1303 | when this function is called. |
1304 | ||
1305 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1306 | If EXTEND is zero, we never extend the vector, | |
1307 | and we store only as many overlays as will fit. | |
1308 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1309 | |
1310 | int | |
239c932b | 1311 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1312 | int pos; |
61d54cd5 | 1313 | int extend; |
2eec3b4e RS |
1314 | Lisp_Object **vec_ptr; |
1315 | int *len_ptr; | |
1316 | int *next_ptr; | |
239c932b | 1317 | int *prev_ptr; |
1ab256cb | 1318 | { |
2eec3b4e RS |
1319 | Lisp_Object tail, overlay, start, end, result; |
1320 | int idx = 0; | |
1321 | int len = *len_ptr; | |
1322 | Lisp_Object *vec = *vec_ptr; | |
1323 | int next = ZV; | |
239c932b | 1324 | int prev = BEGV; |
61d54cd5 RS |
1325 | int inhibit_storing = 0; |
1326 | ||
2eec3b4e | 1327 | for (tail = current_buffer->overlays_before; |
4a44b14c | 1328 | XGCTYPE (tail) == Lisp_Cons; |
2eec3b4e RS |
1329 | tail = XCONS (tail)->cdr) |
1330 | { | |
239c932b | 1331 | int startpos, endpos; |
52f8ec73 | 1332 | |
2eec3b4e | 1333 | overlay = XCONS (tail)->car; |
3ccf510a | 1334 | if (XGCTYPE (overlay) != Lisp_Overlay) |
52f8ec73 | 1335 | abort (); |
1ab256cb | 1336 | |
2eec3b4e RS |
1337 | start = OVERLAY_START (overlay); |
1338 | end = OVERLAY_END (overlay); | |
239c932b RS |
1339 | endpos = OVERLAY_POSITION (end); |
1340 | if (endpos < pos) | |
1341 | { | |
1342 | if (prev < endpos) | |
1343 | prev = endpos; | |
1344 | break; | |
1345 | } | |
1346 | if (endpos == pos) | |
1347 | continue; | |
2eec3b4e RS |
1348 | startpos = OVERLAY_POSITION (start); |
1349 | if (startpos <= pos) | |
1350 | { | |
1351 | if (idx == len) | |
1352 | { | |
61d54cd5 RS |
1353 | /* The supplied vector is full. |
1354 | Either make it bigger, or don't store any more in it. */ | |
1355 | if (extend) | |
1356 | { | |
1357 | *len_ptr = len *= 2; | |
1358 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1359 | *vec_ptr = vec; | |
1360 | } | |
1361 | else | |
1362 | inhibit_storing = 1; | |
2eec3b4e | 1363 | } |
61d54cd5 RS |
1364 | |
1365 | if (!inhibit_storing) | |
1366 | vec[idx] = overlay; | |
1367 | /* Keep counting overlays even if we can't return them all. */ | |
1368 | idx++; | |
2eec3b4e RS |
1369 | } |
1370 | else if (startpos < next) | |
1371 | next = startpos; | |
1372 | } | |
1373 | ||
1374 | for (tail = current_buffer->overlays_after; | |
4a44b14c | 1375 | XGCTYPE (tail) == Lisp_Cons; |
2eec3b4e | 1376 | tail = XCONS (tail)->cdr) |
1ab256cb | 1377 | { |
239c932b | 1378 | int startpos, endpos; |
52f8ec73 | 1379 | |
2eec3b4e | 1380 | overlay = XCONS (tail)->car; |
3ccf510a | 1381 | if (XGCTYPE (overlay) != Lisp_Overlay) |
52f8ec73 | 1382 | abort (); |
2eec3b4e RS |
1383 | |
1384 | start = OVERLAY_START (overlay); | |
1385 | end = OVERLAY_END (overlay); | |
1386 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1387 | if (pos < startpos) |
2eec3b4e RS |
1388 | { |
1389 | if (startpos < next) | |
1390 | next = startpos; | |
1391 | break; | |
1392 | } | |
239c932b RS |
1393 | endpos = OVERLAY_POSITION (end); |
1394 | if (pos < endpos) | |
2eec3b4e RS |
1395 | { |
1396 | if (idx == len) | |
1397 | { | |
61d54cd5 RS |
1398 | if (extend) |
1399 | { | |
1400 | *len_ptr = len *= 2; | |
1401 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1402 | *vec_ptr = vec; | |
1403 | } | |
1404 | else | |
1405 | inhibit_storing = 1; | |
2eec3b4e | 1406 | } |
61d54cd5 RS |
1407 | |
1408 | if (!inhibit_storing) | |
1409 | vec[idx] = overlay; | |
1410 | idx++; | |
2eec3b4e | 1411 | } |
239c932b RS |
1412 | else if (endpos < pos && endpos > prev) |
1413 | prev = endpos; | |
1ab256cb RM |
1414 | } |
1415 | ||
239c932b RS |
1416 | if (next_ptr) |
1417 | *next_ptr = next; | |
1418 | if (prev_ptr) | |
1419 | *prev_ptr = prev; | |
2eec3b4e RS |
1420 | return idx; |
1421 | } | |
1422 | \f | |
5985d248 KH |
1423 | struct sortvec |
1424 | { | |
1425 | Lisp_Object overlay; | |
1426 | int beg, end; | |
1427 | int priority; | |
1428 | }; | |
1429 | ||
1430 | static int | |
1431 | compare_overlays (s1, s2) | |
1432 | struct sortvec *s1, *s2; | |
1433 | { | |
1434 | if (s1->priority != s2->priority) | |
1435 | return s1->priority - s2->priority; | |
1436 | if (s1->beg != s2->beg) | |
1437 | return s1->beg - s2->beg; | |
1438 | if (s1->end != s2->end) | |
1439 | return s2->end - s1->end; | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | /* Sort an array of overlays by priority. The array is modified in place. | |
1444 | The return value is the new size; this may be smaller than the original | |
1445 | size if some of the overlays were invalid or were window-specific. */ | |
1446 | int | |
1447 | sort_overlays (overlay_vec, noverlays, w) | |
1448 | Lisp_Object *overlay_vec; | |
1449 | int noverlays; | |
1450 | struct window *w; | |
1451 | { | |
1452 | int i, j; | |
1453 | struct sortvec *sortvec; | |
1454 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1455 | ||
1456 | /* Put the valid and relevant overlays into sortvec. */ | |
1457 | ||
1458 | for (i = 0, j = 0; i < noverlays; i++) | |
1459 | { | |
0fa767e7 | 1460 | Lisp_Object tem; |
c99fc30f | 1461 | Lisp_Object overlay; |
5985d248 | 1462 | |
c99fc30f | 1463 | overlay = overlay_vec[i]; |
5985d248 KH |
1464 | if (OVERLAY_VALID (overlay) |
1465 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1466 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1467 | { | |
0fa767e7 KH |
1468 | /* If we're interested in a specific window, then ignore |
1469 | overlays that are limited to some other window. */ | |
1470 | if (w) | |
5985d248 | 1471 | { |
0fa767e7 KH |
1472 | Lisp_Object window; |
1473 | ||
1474 | window = Foverlay_get (overlay, Qwindow); | |
1475 | if (XTYPE (window) == Lisp_Window && XWINDOW (window) != w) | |
1476 | continue; | |
5985d248 | 1477 | } |
0fa767e7 KH |
1478 | |
1479 | /* This overlay is good and counts: put it into sortvec. */ | |
1480 | sortvec[j].overlay = overlay; | |
1481 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1482 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1483 | tem = Foverlay_get (overlay, Qpriority); | |
1484 | if (INTEGERP (tem)) | |
1485 | sortvec[j].priority = XINT (tem); | |
1486 | else | |
1487 | sortvec[j].priority = 0; | |
1488 | j++; | |
5985d248 KH |
1489 | } |
1490 | } | |
1491 | noverlays = j; | |
1492 | ||
1493 | /* Sort the overlays into the proper order: increasing priority. */ | |
1494 | ||
1495 | if (noverlays > 1) | |
1496 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
1497 | ||
1498 | for (i = 0; i < noverlays; i++) | |
1499 | overlay_vec[i] = sortvec[i].overlay; | |
1500 | return (noverlays); | |
1501 | } | |
1502 | \f | |
5c4f68f1 | 1503 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1504 | |
2eec3b4e | 1505 | void |
5c4f68f1 JB |
1506 | recenter_overlay_lists (buf, pos) |
1507 | struct buffer *buf; | |
2eec3b4e RS |
1508 | int pos; |
1509 | { | |
1510 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1511 | ||
1512 | /* See if anything in overlays_before should move to overlays_after. */ | |
1513 | ||
1514 | /* We don't strictly need prev in this loop; it should always be nil. | |
1515 | But we use it for symmetry and in case that should cease to be true | |
1516 | with some future change. */ | |
1517 | prev = Qnil; | |
5c4f68f1 | 1518 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1519 | CONSP (tail); |
1520 | prev = tail, tail = next) | |
1ab256cb | 1521 | { |
2eec3b4e RS |
1522 | next = XCONS (tail)->cdr; |
1523 | overlay = XCONS (tail)->car; | |
1524 | ||
1525 | /* If the overlay is not valid, get rid of it. */ | |
1526 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1527 | #if 1 |
1528 | abort (); | |
1529 | #else | |
2eec3b4e RS |
1530 | { |
1531 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1532 | if (!NILP (prev)) | |
1533 | XCONS (prev)->cdr = next; | |
1534 | else | |
5c4f68f1 | 1535 | buf->overlays_before = next; |
2eec3b4e RS |
1536 | tail = prev; |
1537 | continue; | |
1538 | } | |
52f8ec73 | 1539 | #endif |
1ab256cb | 1540 | |
2eec3b4e RS |
1541 | beg = OVERLAY_START (overlay); |
1542 | end = OVERLAY_END (overlay); | |
1ab256cb | 1543 | |
2eec3b4e | 1544 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1545 | { |
2eec3b4e RS |
1546 | /* OVERLAY needs to be moved. */ |
1547 | int where = OVERLAY_POSITION (beg); | |
1548 | Lisp_Object other, other_prev; | |
1549 | ||
1550 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1551 | if (!NILP (prev)) | |
1552 | XCONS (prev)->cdr = next; | |
1553 | else | |
5c4f68f1 | 1554 | buf->overlays_before = next; |
2eec3b4e RS |
1555 | |
1556 | /* Search thru overlays_after for where to put it. */ | |
1557 | other_prev = Qnil; | |
5c4f68f1 | 1558 | for (other = buf->overlays_after; |
2eec3b4e RS |
1559 | CONSP (other); |
1560 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1561 | { |
2eec3b4e RS |
1562 | Lisp_Object otherbeg, otheroverlay, follower; |
1563 | int win; | |
1564 | ||
1565 | otheroverlay = XCONS (other)->car; | |
1566 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1567 | abort (); |
2eec3b4e RS |
1568 | |
1569 | otherbeg = OVERLAY_START (otheroverlay); | |
1570 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1571 | break; | |
1ab256cb | 1572 | } |
2eec3b4e RS |
1573 | |
1574 | /* Add TAIL to overlays_after before OTHER. */ | |
1575 | XCONS (tail)->cdr = other; | |
1576 | if (!NILP (other_prev)) | |
1577 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1578 | else |
5c4f68f1 | 1579 | buf->overlays_after = tail; |
2eec3b4e | 1580 | tail = prev; |
1ab256cb | 1581 | } |
2eec3b4e RS |
1582 | else |
1583 | /* We've reached the things that should stay in overlays_before. | |
1584 | All the rest of overlays_before must end even earlier, | |
1585 | so stop now. */ | |
1586 | break; | |
1587 | } | |
1588 | ||
1589 | /* See if anything in overlays_after should be in overlays_before. */ | |
1590 | prev = Qnil; | |
5c4f68f1 | 1591 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1592 | CONSP (tail); |
1593 | prev = tail, tail = next) | |
1594 | { | |
1595 | next = XCONS (tail)->cdr; | |
1596 | overlay = XCONS (tail)->car; | |
1597 | ||
1598 | /* If the overlay is not valid, get rid of it. */ | |
1599 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1600 | #if 1 |
1601 | abort (); | |
1602 | #else | |
2eec3b4e RS |
1603 | { |
1604 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1605 | if (!NILP (prev)) | |
1606 | XCONS (prev)->cdr = next; | |
1607 | else | |
5c4f68f1 | 1608 | buf->overlays_after = next; |
2eec3b4e RS |
1609 | tail = prev; |
1610 | continue; | |
1611 | } | |
52f8ec73 | 1612 | #endif |
2eec3b4e RS |
1613 | |
1614 | beg = OVERLAY_START (overlay); | |
1615 | end = OVERLAY_END (overlay); | |
1616 | ||
1617 | /* Stop looking, when we know that nothing further | |
1618 | can possibly end before POS. */ | |
1619 | if (OVERLAY_POSITION (beg) > pos) | |
1620 | break; | |
1621 | ||
1622 | if (OVERLAY_POSITION (end) <= pos) | |
1623 | { | |
1624 | /* OVERLAY needs to be moved. */ | |
1625 | int where = OVERLAY_POSITION (end); | |
1626 | Lisp_Object other, other_prev; | |
1627 | ||
1628 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1629 | if (!NILP (prev)) | |
1630 | XCONS (prev)->cdr = next; | |
1631 | else | |
5c4f68f1 | 1632 | buf->overlays_after = next; |
2eec3b4e RS |
1633 | |
1634 | /* Search thru overlays_before for where to put it. */ | |
1635 | other_prev = Qnil; | |
5c4f68f1 | 1636 | for (other = buf->overlays_before; |
2eec3b4e RS |
1637 | CONSP (other); |
1638 | other_prev = other, other = XCONS (other)->cdr) | |
1639 | { | |
1640 | Lisp_Object otherend, otheroverlay; | |
1641 | int win; | |
1642 | ||
1643 | otheroverlay = XCONS (other)->car; | |
1644 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1645 | abort (); |
2eec3b4e RS |
1646 | |
1647 | otherend = OVERLAY_END (otheroverlay); | |
1648 | if (OVERLAY_POSITION (otherend) <= where) | |
1649 | break; | |
1650 | } | |
1651 | ||
1652 | /* Add TAIL to overlays_before before OTHER. */ | |
1653 | XCONS (tail)->cdr = other; | |
1654 | if (!NILP (other_prev)) | |
1655 | XCONS (other_prev)->cdr = tail; | |
1656 | else | |
5c4f68f1 | 1657 | buf->overlays_before = tail; |
2eec3b4e RS |
1658 | tail = prev; |
1659 | } | |
1660 | } | |
1661 | ||
5c4f68f1 | 1662 | XFASTINT (buf->overlay_center) = pos; |
2eec3b4e | 1663 | } |
2b1bdf65 KH |
1664 | |
1665 | /* Fix up overlays that were garbled as a result of permuting markers | |
1666 | in the range START through END. Any overlay with at least one | |
1667 | endpoint in this range will need to be unlinked from the overlay | |
1668 | list and reinserted in its proper place. | |
1669 | Such an overlay might even have negative size at this point. | |
1670 | If so, we'll reverse the endpoints. Can you think of anything | |
1671 | better to do in this situation? */ | |
1672 | void | |
1673 | fix_overlays_in_range (start, end) | |
1674 | register int start, end; | |
1675 | { | |
1676 | Lisp_Object tem, overlay; | |
1677 | Lisp_Object before_list, after_list; | |
1678 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
1679 | int startpos, endpos; | |
1680 | ||
1681 | /* This algorithm shifts links around instead of consing and GCing. | |
1682 | The loop invariant is that before_list (resp. after_list) is a | |
1683 | well-formed list except that its last element, the one that | |
1684 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
1685 | So it's not a bug that before_list isn't initialized, although | |
1686 | it may look strange. */ | |
1687 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
1688 | { | |
1689 | overlay = XCONS (*ptail)->car; | |
1690 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1691 | if (endpos < start) | |
1692 | break; | |
1693 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1694 | if (endpos < end | |
1695 | || (startpos >= start && startpos < end)) | |
1696 | { | |
1697 | /* If the overlay is backwards, fix that now. */ | |
1698 | if (startpos > endpos) | |
1699 | { | |
1700 | int tem; | |
1701 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1702 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1703 | tem = startpos; startpos = endpos; endpos = tem; | |
1704 | } | |
1705 | /* Add it to the end of the wrong list. Later on, | |
1706 | recenter_overlay_lists will move it to the right place. */ | |
1707 | if (endpos < XINT (current_buffer->overlay_center)) | |
1708 | { | |
1709 | *pafter = *ptail; | |
1710 | pafter = &XCONS (*ptail)->cdr; | |
1711 | } | |
1712 | else | |
1713 | { | |
1714 | *pbefore = *ptail; | |
1715 | pbefore = &XCONS (*ptail)->cdr; | |
1716 | } | |
1717 | *ptail = XCONS (*ptail)->cdr; | |
1718 | } | |
1719 | else | |
1720 | ptail = &XCONS (*ptail)->cdr; | |
1721 | } | |
1722 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
1723 | { | |
1724 | overlay = XCONS (*ptail)->car; | |
1725 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1726 | if (startpos >= end) | |
1727 | break; | |
1728 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1729 | if (startpos >= start | |
1730 | || (endpos >= start && endpos < end)) | |
1731 | { | |
1732 | if (startpos > endpos) | |
1733 | { | |
1734 | int tem; | |
1735 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1736 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1737 | tem = startpos; startpos = endpos; endpos = tem; | |
1738 | } | |
1739 | if (endpos < XINT (current_buffer->overlay_center)) | |
1740 | { | |
1741 | *pafter = *ptail; | |
1742 | pafter = &XCONS (*ptail)->cdr; | |
1743 | } | |
1744 | else | |
1745 | { | |
1746 | *pbefore = *ptail; | |
1747 | pbefore = &XCONS (*ptail)->cdr; | |
1748 | } | |
1749 | *ptail = XCONS (*ptail)->cdr; | |
1750 | } | |
1751 | else | |
1752 | ptail = &XCONS (*ptail)->cdr; | |
1753 | } | |
1754 | ||
1755 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
1756 | and let the recenter function make it sane again. */ | |
1757 | *pbefore = current_buffer->overlays_before; | |
1758 | current_buffer->overlays_before = before_list; | |
1759 | recenter_overlay_lists (current_buffer, | |
1760 | XINT (current_buffer->overlay_center)); | |
1761 | ||
1762 | *pafter = current_buffer->overlays_after; | |
1763 | current_buffer->overlays_after = after_list; | |
1764 | recenter_overlay_lists (current_buffer, | |
1765 | XINT (current_buffer->overlay_center)); | |
1766 | } | |
2eec3b4e | 1767 | \f |
52f8ec73 JB |
1768 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1769 | "Return t if OBJECT is an overlay.") | |
1770 | (object) | |
1771 | Lisp_Object object; | |
1772 | { | |
1773 | return (OVERLAYP (object) ? Qt : Qnil); | |
1774 | } | |
1775 | ||
5c4f68f1 JB |
1776 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1777 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1778 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1779 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1780 | (beg, end, buffer) |
1781 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1782 | { |
1783 | Lisp_Object overlay; | |
5c4f68f1 | 1784 | struct buffer *b; |
2eec3b4e | 1785 | |
5c4f68f1 JB |
1786 | if (NILP (buffer)) |
1787 | XSET (buffer, Lisp_Buffer, current_buffer); | |
883047b9 JB |
1788 | else |
1789 | CHECK_BUFFER (buffer, 2); | |
1790 | if (MARKERP (beg) | |
1791 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1792 | error ("Marker points into wrong buffer"); | |
1793 | if (MARKERP (end) | |
1794 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1795 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 1796 | |
883047b9 JB |
1797 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1798 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 1799 | |
883047b9 | 1800 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 1801 | { |
c99fc30f KH |
1802 | Lisp_Object temp; |
1803 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 1804 | } |
883047b9 JB |
1805 | |
1806 | b = XBUFFER (buffer); | |
1807 | ||
1808 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
1809 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 JB |
1810 | |
1811 | overlay = Fcons (Fcons (beg, end), Qnil); | |
52f8ec73 | 1812 | XSETTYPE (overlay, Lisp_Overlay); |
2eec3b4e RS |
1813 | |
1814 | /* Put the new overlay on the wrong list. */ | |
1815 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1816 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1817 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1818 | else |
5c4f68f1 | 1819 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1820 | |
1821 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1822 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1823 | |
b61982dd JB |
1824 | /* We don't need to redisplay the region covered by the overlay, because |
1825 | the overlay has no properties at the moment. */ | |
1826 | ||
2eec3b4e RS |
1827 | return overlay; |
1828 | } | |
1829 | ||
5c4f68f1 JB |
1830 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
1831 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
1832 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
1833 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
1834 | buffer.") | |
5c4f68f1 JB |
1835 | (overlay, beg, end, buffer) |
1836 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 1837 | { |
0a4469c9 RS |
1838 | struct buffer *b, *ob; |
1839 | Lisp_Object obuffer; | |
1840 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 1841 | |
52f8ec73 | 1842 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
1843 | if (NILP (buffer)) |
1844 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a JB |
1845 | if (NILP (buffer)) |
1846 | XSET (buffer, Lisp_Buffer, current_buffer); | |
5c4f68f1 | 1847 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
1848 | |
1849 | if (MARKERP (beg) | |
1850 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1851 | error ("Marker points into wrong buffer"); | |
1852 | if (MARKERP (end) | |
1853 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1854 | error ("Marker points into wrong buffer"); | |
1855 | ||
b61982dd JB |
1856 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1857 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
1858 | ||
9d7608b7 KH |
1859 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
1860 | return Fdelete_overlay (overlay); | |
0a4469c9 | 1861 | |
b61982dd JB |
1862 | if (XINT (beg) > XINT (end)) |
1863 | { | |
c99fc30f KH |
1864 | Lisp_Object temp; |
1865 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
1866 | } |
1867 | ||
9d7608b7 KH |
1868 | specbind (Qinhibit_quit, Qt); |
1869 | ||
0a4469c9 | 1870 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 1871 | b = XBUFFER (buffer); |
0a4469c9 | 1872 | ob = XBUFFER (obuffer); |
2eec3b4e | 1873 | |
c82ed728 | 1874 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 1875 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
1876 | { |
1877 | /* Redisplay where the overlay was. */ | |
1878 | if (!NILP (obuffer)) | |
1879 | { | |
1880 | Lisp_Object o_beg; | |
1881 | Lisp_Object o_end; | |
1882 | ||
1883 | o_beg = OVERLAY_START (overlay); | |
1884 | o_end = OVERLAY_END (overlay); | |
1885 | o_beg = OVERLAY_POSITION (o_beg); | |
1886 | o_end = OVERLAY_POSITION (o_end); | |
1887 | ||
efd90478 | 1888 | redisplay_region (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
1889 | } |
1890 | ||
1891 | /* Redisplay where the overlay is going to be. */ | |
efd90478 | 1892 | redisplay_region (b, XINT (beg), XINT (end)); |
50760c4a RS |
1893 | |
1894 | /* Don't limit redisplay to the selected window. */ | |
1895 | windows_or_buffers_changed = 1; | |
1896 | } | |
c82ed728 JB |
1897 | else |
1898 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
1899 | { | |
be8b1c6b RS |
1900 | Lisp_Object o_beg; |
1901 | Lisp_Object o_end; | |
c82ed728 JB |
1902 | int change_beg, change_end; |
1903 | ||
be8b1c6b RS |
1904 | o_beg = OVERLAY_START (overlay); |
1905 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
1906 | o_beg = OVERLAY_POSITION (o_beg); |
1907 | o_end = OVERLAY_POSITION (o_end); | |
1908 | ||
1909 | if (XINT (o_beg) == XINT (beg)) | |
1910 | redisplay_region (b, XINT (o_end), XINT (end)); | |
1911 | else if (XINT (o_end) == XINT (end)) | |
1912 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
1913 | else | |
1914 | { | |
1915 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
1916 | if (XINT (end) > XINT (o_end)) o_end = end; | |
1917 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
1918 | } | |
1919 | } | |
b61982dd | 1920 | |
0a4469c9 RS |
1921 | if (!NILP (obuffer)) |
1922 | { | |
1923 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
1924 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
1925 | } | |
5c4f68f1 JB |
1926 | |
1927 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
1928 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
1929 | |
1930 | /* Put the overlay on the wrong list. */ | |
1931 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1932 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1933 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1934 | else |
5c4f68f1 | 1935 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1936 | |
1937 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1938 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1939 | |
0a4469c9 | 1940 | return unbind_to (count, overlay); |
2eec3b4e RS |
1941 | } |
1942 | ||
1943 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 1944 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 1945 | (overlay) |
5c4f68f1 | 1946 | Lisp_Object overlay; |
2eec3b4e | 1947 | { |
0a4469c9 | 1948 | Lisp_Object buffer; |
5c4f68f1 | 1949 | struct buffer *b; |
0a4469c9 | 1950 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 1951 | |
52f8ec73 JB |
1952 | CHECK_OVERLAY (overlay, 0); |
1953 | ||
0a4469c9 RS |
1954 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
1955 | if (NILP (buffer)) | |
1956 | return Qnil; | |
1957 | ||
1958 | b = XBUFFER (buffer); | |
1959 | ||
1960 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
1961 | |
1962 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
1963 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
1964 | ||
b61982dd | 1965 | redisplay_region (b, |
a927f5c9 RS |
1966 | marker_position (OVERLAY_START (overlay)), |
1967 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 1968 | |
3ece337a JB |
1969 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
1970 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
1971 | ||
0a4469c9 | 1972 | return unbind_to (count, Qnil); |
2eec3b4e RS |
1973 | } |
1974 | \f | |
8ebafa8d JB |
1975 | /* Overlay dissection functions. */ |
1976 | ||
1977 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
1978 | "Return the position at which OVERLAY starts.") | |
1979 | (overlay) | |
1980 | Lisp_Object overlay; | |
1981 | { | |
1982 | CHECK_OVERLAY (overlay, 0); | |
1983 | ||
1984 | return (Fmarker_position (OVERLAY_START (overlay))); | |
1985 | } | |
1986 | ||
1987 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
1988 | "Return the position at which OVERLAY ends.") | |
1989 | (overlay) | |
1990 | Lisp_Object overlay; | |
1991 | { | |
1992 | CHECK_OVERLAY (overlay, 0); | |
1993 | ||
1994 | return (Fmarker_position (OVERLAY_END (overlay))); | |
1995 | } | |
1996 | ||
1997 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
1998 | "Return the buffer OVERLAY belongs to.") | |
1999 | (overlay) | |
2000 | Lisp_Object overlay; | |
2001 | { | |
2002 | CHECK_OVERLAY (overlay, 0); | |
2003 | ||
2004 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2005 | } | |
2006 | ||
2007 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2008 | "Return a list of the properties on OVERLAY.\n\ | |
2009 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2010 | OVERLAY.") | |
2011 | (overlay) | |
2012 | Lisp_Object overlay; | |
2013 | { | |
2014 | CHECK_OVERLAY (overlay, 0); | |
2015 | ||
2016 | return Fcopy_sequence (Fcdr_safe (XCONS (overlay)->cdr)); | |
2017 | } | |
2018 | ||
2019 | \f | |
2eec3b4e | 2020 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2021 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2022 | (pos) |
2023 | Lisp_Object pos; | |
2024 | { | |
2025 | int noverlays; | |
2eec3b4e RS |
2026 | Lisp_Object *overlay_vec; |
2027 | int len; | |
2028 | Lisp_Object result; | |
2029 | ||
2030 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2031 | ||
2032 | len = 10; | |
2033 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2034 | ||
2035 | /* Put all the overlays we want in a vector in overlay_vec. | |
2036 | Store the length in len. */ | |
239c932b | 2037 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, NULL); |
2eec3b4e RS |
2038 | |
2039 | /* Make a list of them all. */ | |
2040 | result = Flist (noverlays, overlay_vec); | |
2041 | ||
9ac0d9e0 | 2042 | xfree (overlay_vec); |
2eec3b4e RS |
2043 | return result; |
2044 | } | |
2045 | ||
2046 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
2047 | 1, 1, 0, | |
bbe20e81 KH |
2048 | "Return the next position after POS where an overlay starts or ends.\n\ |
2049 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2050 | (pos) |
2051 | Lisp_Object pos; | |
2052 | { | |
2053 | int noverlays; | |
2054 | int endpos; | |
2055 | Lisp_Object *overlay_vec; | |
2056 | int len; | |
2eec3b4e RS |
2057 | int i; |
2058 | ||
2059 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2060 | ||
2061 | len = 10; | |
2062 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2063 | ||
2064 | /* Put all the overlays we want in a vector in overlay_vec. | |
2065 | Store the length in len. | |
2066 | endpos gets the position where the next overlay starts. */ | |
239c932b | 2067 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos, NULL); |
2eec3b4e RS |
2068 | |
2069 | /* If any of these overlays ends before endpos, | |
2070 | use its ending point instead. */ | |
2071 | for (i = 0; i < noverlays; i++) | |
2072 | { | |
2073 | Lisp_Object oend; | |
2074 | int oendpos; | |
2075 | ||
2076 | oend = OVERLAY_END (overlay_vec[i]); | |
2077 | oendpos = OVERLAY_POSITION (oend); | |
2078 | if (oendpos < endpos) | |
2079 | endpos = oendpos; | |
1ab256cb RM |
2080 | } |
2081 | ||
9ac0d9e0 | 2082 | xfree (overlay_vec); |
2eec3b4e RS |
2083 | return make_number (endpos); |
2084 | } | |
239c932b RS |
2085 | |
2086 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
2087 | Sprevious_overlay_change, 1, 1, 0, | |
2088 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
2089 | If there are no more overlay boundaries after POS, return (point-min).") | |
2090 | (pos) | |
2091 | Lisp_Object pos; | |
2092 | { | |
2093 | int noverlays; | |
2094 | int prevpos; | |
2095 | Lisp_Object *overlay_vec; | |
2096 | int len; | |
2097 | int i; | |
2098 | ||
2099 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2100 | ||
2101 | len = 10; | |
2102 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2103 | ||
2104 | /* Put all the overlays we want in a vector in overlay_vec. | |
2105 | Store the length in len. | |
2106 | prevpos gets the position of an overlay end. */ | |
2107 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, &prevpos); | |
2108 | ||
2109 | /* If any of these overlays starts before endpos, | |
2110 | maybe use its starting point instead. */ | |
2111 | for (i = 0; i < noverlays; i++) | |
2112 | { | |
2113 | Lisp_Object ostart; | |
2114 | int ostartpos; | |
2115 | ||
2116 | ostart = OVERLAY_START (overlay_vec[i]); | |
2117 | ostartpos = OVERLAY_POSITION (ostart); | |
2118 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2119 | prevpos = ostartpos; | |
2120 | } | |
2121 | ||
2122 | xfree (overlay_vec); | |
2123 | return make_number (prevpos); | |
2124 | } | |
2eec3b4e RS |
2125 | \f |
2126 | /* These functions are for debugging overlays. */ | |
2127 | ||
2128 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2129 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2130 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2131 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2132 | Recentering overlays moves overlays between these lists.\n\ |
2133 | The lists you get are copies, so that changing them has no effect.\n\ | |
2134 | However, the overlays you get are the real objects that the buffer uses.") | |
2135 | () | |
2136 | { | |
2137 | Lisp_Object before, after; | |
2138 | before = current_buffer->overlays_before; | |
2139 | if (CONSP (before)) | |
2140 | before = Fcopy_sequence (before); | |
2141 | after = current_buffer->overlays_after; | |
2142 | if (CONSP (after)) | |
2143 | after = Fcopy_sequence (after); | |
2144 | ||
2145 | return Fcons (before, after); | |
2146 | } | |
2147 | ||
2148 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
2149 | "Recenter the overlays of the current buffer around position POS.") | |
2150 | (pos) | |
2151 | Lisp_Object pos; | |
2152 | { | |
2153 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2154 | ||
5c4f68f1 | 2155 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
2156 | return Qnil; |
2157 | } | |
2158 | \f | |
2159 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
2160 | "Get the property of overlay OVERLAY with property name NAME.") | |
2161 | (overlay, prop) | |
2162 | Lisp_Object overlay, prop; | |
2163 | { | |
2164 | Lisp_Object plist; | |
52f8ec73 JB |
2165 | |
2166 | CHECK_OVERLAY (overlay, 0); | |
2167 | ||
2168 | for (plist = Fcdr_safe (XCONS (overlay)->cdr); | |
2eec3b4e RS |
2169 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
2170 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
2171 | { | |
2172 | if (EQ (XCONS (plist)->car, prop)) | |
2173 | return XCONS (XCONS (plist)->cdr)->car; | |
2174 | } | |
52f8ec73 JB |
2175 | |
2176 | return Qnil; | |
2eec3b4e RS |
2177 | } |
2178 | ||
2179 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
2180 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
2181 | (overlay, prop, value) | |
2182 | Lisp_Object overlay, prop, value; | |
2183 | { | |
274a9425 | 2184 | Lisp_Object plist, tail, buffer; |
9d7608b7 | 2185 | int changed; |
2eec3b4e | 2186 | |
52f8ec73 | 2187 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 2188 | |
274a9425 RS |
2189 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2190 | ||
52f8ec73 | 2191 | plist = Fcdr_safe (XCONS (overlay)->cdr); |
2eec3b4e RS |
2192 | |
2193 | for (tail = plist; | |
2194 | CONSP (tail) && CONSP (XCONS (tail)->cdr); | |
2195 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
2196 | if (EQ (XCONS (tail)->car, prop)) |
2197 | { | |
9d7608b7 KH |
2198 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
2199 | XCONS (XCONS (tail)->cdr)->car = value; | |
2200 | goto found; | |
274a9425 | 2201 | } |
9d7608b7 KH |
2202 | /* It wasn't in the list, so add it to the front. */ |
2203 | changed = !NILP (value); | |
2eec3b4e RS |
2204 | if (! CONSP (XCONS (overlay)->cdr)) |
2205 | XCONS (overlay)->cdr = Fcons (Qnil, Qnil); | |
9d7608b7 KH |
2206 | XCONS (XCONS (overlay)->cdr)->cdr = Fcons (prop, Fcons (value, plist)); |
2207 | found: | |
2208 | if (! NILP (buffer)) | |
2209 | { | |
2210 | if (changed) | |
2211 | redisplay_region (XBUFFER (buffer), | |
2212 | marker_position (OVERLAY_START (overlay)), | |
2213 | marker_position (OVERLAY_END (overlay))); | |
2214 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
2215 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
2216 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
2217 | Fdelete_overlay (overlay); | |
2218 | } | |
2eec3b4e | 2219 | return value; |
1ab256cb RM |
2220 | } |
2221 | \f | |
173f2a64 RS |
2222 | /* Run the modification-hooks of overlays that include |
2223 | any part of the text in START to END. | |
2224 | Run the insert-before-hooks of overlay starting at END, | |
2225 | and the insert-after-hooks of overlay ending at START. */ | |
2226 | ||
2227 | void | |
2228 | verify_overlay_modification (start, end) | |
2229 | Lisp_Object start, end; | |
2230 | { | |
2231 | Lisp_Object prop, overlay, tail; | |
2232 | int insertion = EQ (start, end); | |
55b48893 RS |
2233 | int tail_copied; |
2234 | struct gcpro gcpro1, gcpro2; | |
2235 | ||
2236 | overlay = Qnil; | |
2237 | tail = Qnil; | |
2238 | GCPRO2 (overlay, tail); | |
173f2a64 | 2239 | |
55b48893 | 2240 | tail_copied = 0; |
173f2a64 RS |
2241 | for (tail = current_buffer->overlays_before; |
2242 | CONSP (tail); | |
2243 | tail = XCONS (tail)->cdr) | |
2244 | { | |
2245 | int startpos, endpos; | |
be8b1c6b | 2246 | Lisp_Object ostart, oend; |
173f2a64 RS |
2247 | |
2248 | overlay = XCONS (tail)->car; | |
2249 | ||
2250 | ostart = OVERLAY_START (overlay); | |
2251 | oend = OVERLAY_END (overlay); | |
2252 | endpos = OVERLAY_POSITION (oend); | |
2253 | if (XFASTINT (start) > endpos) | |
2254 | break; | |
2255 | startpos = OVERLAY_POSITION (ostart); | |
2256 | if (XFASTINT (end) == startpos && insertion) | |
2257 | { | |
2258 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2259 | if (!NILP (prop)) |
2260 | { | |
2261 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
2262 | if (!tail_copied) |
2263 | tail = Fcopy_sequence (tail); | |
2264 | tail_copied = 1; | |
5fb5aa33 RS |
2265 | call_overlay_mod_hooks (prop, overlay, start, end); |
2266 | } | |
173f2a64 RS |
2267 | } |
2268 | if (XFASTINT (start) == endpos && insertion) | |
2269 | { | |
2270 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2271 | if (!NILP (prop)) |
2272 | { | |
55b48893 RS |
2273 | if (!tail_copied) |
2274 | tail = Fcopy_sequence (tail); | |
2275 | tail_copied = 1; | |
5fb5aa33 RS |
2276 | call_overlay_mod_hooks (prop, overlay, start, end); |
2277 | } | |
173f2a64 | 2278 | } |
3bd13e92 KH |
2279 | /* Test for intersecting intervals. This does the right thing |
2280 | for both insertion and deletion. */ | |
2281 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2282 | { |
2283 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2284 | if (!NILP (prop)) |
2285 | { | |
55b48893 RS |
2286 | if (!tail_copied) |
2287 | tail = Fcopy_sequence (tail); | |
2288 | tail_copied = 1; | |
5fb5aa33 RS |
2289 | call_overlay_mod_hooks (prop, overlay, start, end); |
2290 | } | |
173f2a64 RS |
2291 | } |
2292 | } | |
2293 | ||
55b48893 | 2294 | tail_copied = 0; |
173f2a64 RS |
2295 | for (tail = current_buffer->overlays_after; |
2296 | CONSP (tail); | |
2297 | tail = XCONS (tail)->cdr) | |
2298 | { | |
2299 | int startpos, endpos; | |
be8b1c6b | 2300 | Lisp_Object ostart, oend; |
173f2a64 RS |
2301 | |
2302 | overlay = XCONS (tail)->car; | |
2303 | ||
2304 | ostart = OVERLAY_START (overlay); | |
2305 | oend = OVERLAY_END (overlay); | |
2306 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 2307 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
2308 | if (XFASTINT (end) < startpos) |
2309 | break; | |
2310 | if (XFASTINT (end) == startpos && insertion) | |
2311 | { | |
2312 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2313 | if (!NILP (prop)) |
2314 | { | |
55b48893 RS |
2315 | if (!tail_copied) |
2316 | tail = Fcopy_sequence (tail); | |
2317 | tail_copied = 1; | |
5fb5aa33 RS |
2318 | call_overlay_mod_hooks (prop, overlay, start, end); |
2319 | } | |
173f2a64 RS |
2320 | } |
2321 | if (XFASTINT (start) == endpos && insertion) | |
2322 | { | |
2323 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2324 | if (!NILP (prop)) |
2325 | { | |
55b48893 RS |
2326 | if (!tail_copied) |
2327 | tail = Fcopy_sequence (tail); | |
2328 | tail_copied = 1; | |
5fb5aa33 RS |
2329 | call_overlay_mod_hooks (prop, overlay, start, end); |
2330 | } | |
173f2a64 | 2331 | } |
3bd13e92 KH |
2332 | /* Test for intersecting intervals. This does the right thing |
2333 | for both insertion and deletion. */ | |
2334 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2335 | { |
2336 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2337 | if (!NILP (prop)) |
2338 | { | |
55b48893 RS |
2339 | if (!tail_copied) |
2340 | tail = Fcopy_sequence (tail); | |
2341 | tail_copied = 1; | |
5fb5aa33 RS |
2342 | call_overlay_mod_hooks (prop, overlay, start, end); |
2343 | } | |
173f2a64 RS |
2344 | } |
2345 | } | |
55b48893 RS |
2346 | |
2347 | UNGCPRO; | |
173f2a64 RS |
2348 | } |
2349 | ||
2350 | static void | |
2351 | call_overlay_mod_hooks (list, overlay, start, end) | |
2352 | Lisp_Object list, overlay, start, end; | |
2353 | { | |
2354 | struct gcpro gcpro1; | |
2355 | GCPRO1 (list); | |
2356 | while (!NILP (list)) | |
2357 | { | |
2358 | call3 (Fcar (list), overlay, start, end); | |
2359 | list = Fcdr (list); | |
2360 | } | |
2361 | UNGCPRO; | |
2362 | } | |
9d7608b7 KH |
2363 | |
2364 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
2365 | property is set. */ | |
2366 | void | |
2367 | evaporate_overlays (pos) | |
2368 | int pos; | |
2369 | { | |
2370 | Lisp_Object tail, overlay, hit_list; | |
2371 | ||
2372 | hit_list = Qnil; | |
2373 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
2374 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
2375 | tail = XCONS (tail)->cdr) | |
2376 | { | |
2377 | int endpos; | |
2378 | overlay = XCONS (tail)->car; | |
2379 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2380 | if (endpos < pos) | |
2381 | break; | |
2382 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
2383 | && Foverlay_get (overlay, Qevaporate)) | |
2384 | hit_list = Fcons (overlay, hit_list); | |
2385 | } | |
2386 | else | |
2387 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
2388 | tail = XCONS (tail)->cdr) | |
2389 | { | |
2390 | int startpos; | |
2391 | overlay = XCONS (tail)->cdr; | |
2392 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2393 | if (startpos > pos) | |
2394 | break; | |
2395 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
2396 | && Foverlay_get (overlay, Qevaporate)) | |
2397 | hit_list = Fcons (overlay, hit_list); | |
2398 | } | |
2399 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
2400 | Fdelete_overlay (XCONS (hit_list)->car); | |
2401 | } | |
173f2a64 | 2402 | \f |
0fa3ba92 JB |
2403 | /* Somebody has tried to store NEWVAL into the buffer-local slot with |
2404 | offset XUINT (valcontents), and NEWVAL has an unacceptable type. */ | |
2405 | void | |
2406 | buffer_slot_type_mismatch (valcontents, newval) | |
2407 | Lisp_Object valcontents, newval; | |
2408 | { | |
2409 | unsigned int offset = XUINT (valcontents); | |
5fcd022d | 2410 | unsigned char *symbol_name = |
0fa3ba92 JB |
2411 | (XSYMBOL (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
2412 | ->name->data); | |
2413 | char *type_name; | |
2414 | ||
2415 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) | |
2416 | { | |
2417 | case Lisp_Int: type_name = "integers"; break; | |
2418 | case Lisp_String: type_name = "strings"; break; | |
2419 | case Lisp_Marker: type_name = "markers"; break; | |
2420 | case Lisp_Symbol: type_name = "symbols"; break; | |
2421 | case Lisp_Cons: type_name = "lists"; break; | |
5fcd022d | 2422 | case Lisp_Vector: type_name = "vectors"; break; |
0fa3ba92 JB |
2423 | default: |
2424 | abort (); | |
2425 | } | |
2426 | ||
2427 | error ("only %s should be stored in the buffer-local variable %s", | |
2428 | type_name, symbol_name); | |
2429 | } | |
2430 | \f | |
1ab256cb RM |
2431 | init_buffer_once () |
2432 | { | |
2433 | register Lisp_Object tem; | |
2434 | ||
2435 | /* Make sure all markable slots in buffer_defaults | |
2436 | are initialized reasonably, so mark_buffer won't choke. */ | |
2437 | reset_buffer (&buffer_defaults); | |
bcd40520 | 2438 | reset_buffer_local_variables (&buffer_defaults); |
1ab256cb | 2439 | reset_buffer (&buffer_local_symbols); |
bcd40520 | 2440 | reset_buffer_local_variables (&buffer_local_symbols); |
1ab256cb RM |
2441 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); |
2442 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); | |
2443 | ||
2444 | /* Set up the default values of various buffer slots. */ | |
2445 | /* Must do these before making the first buffer! */ | |
2446 | ||
2447 | /* real setup is done in loaddefs.el */ | |
2448 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2449 | buffer_defaults.abbrev_mode = Qnil; | |
2450 | buffer_defaults.overwrite_mode = Qnil; | |
2451 | buffer_defaults.case_fold_search = Qt; | |
2452 | buffer_defaults.auto_fill_function = Qnil; | |
2453 | buffer_defaults.selective_display = Qnil; | |
2454 | #ifndef old | |
2455 | buffer_defaults.selective_display_ellipses = Qt; | |
2456 | #endif | |
2457 | buffer_defaults.abbrev_table = Qnil; | |
2458 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2459 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2460 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2461 | buffer_defaults.overlays_before = Qnil; |
2462 | buffer_defaults.overlays_after = Qnil; | |
2463 | XFASTINT (buffer_defaults.overlay_center) = 1; | |
1ab256cb RM |
2464 | |
2465 | XFASTINT (buffer_defaults.tab_width) = 8; | |
2466 | buffer_defaults.truncate_lines = Qnil; | |
2467 | buffer_defaults.ctl_arrow = Qt; | |
2468 | ||
54ad07d3 | 2469 | #ifdef MSDOS |
0776cb1b | 2470 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 2471 | #endif |
1ab256cb RM |
2472 | XFASTINT (buffer_defaults.fill_column) = 70; |
2473 | XFASTINT (buffer_defaults.left_margin) = 0; | |
2474 | ||
2475 | /* Assign the local-flags to the slots that have default values. | |
2476 | The local flag is a bit that is used in the buffer | |
2477 | to say that it has its own local value for the slot. | |
2478 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2479 | ||
2480 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 2481 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
2482 | |
2483 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2484 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
2485 | XFASTINT (buffer_local_flags.filename) = -1; | |
2486 | XFASTINT (buffer_local_flags.directory) = -1; | |
2487 | XFASTINT (buffer_local_flags.backed_up) = -1; | |
2488 | XFASTINT (buffer_local_flags.save_length) = -1; | |
2489 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; | |
2490 | XFASTINT (buffer_local_flags.read_only) = -1; | |
2491 | XFASTINT (buffer_local_flags.major_mode) = -1; | |
2492 | XFASTINT (buffer_local_flags.mode_name) = -1; | |
2493 | XFASTINT (buffer_local_flags.undo_list) = -1; | |
c48f61ef | 2494 | XFASTINT (buffer_local_flags.mark_active) = -1; |
1ab256cb RM |
2495 | |
2496 | XFASTINT (buffer_local_flags.mode_line_format) = 1; | |
2497 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; | |
2498 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; | |
2499 | XFASTINT (buffer_local_flags.case_fold_search) = 8; | |
2500 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; | |
2501 | XFASTINT (buffer_local_flags.selective_display) = 0x20; | |
2502 | #ifndef old | |
2503 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; | |
2504 | #endif | |
2505 | XFASTINT (buffer_local_flags.tab_width) = 0x80; | |
2506 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; | |
2507 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; | |
2508 | XFASTINT (buffer_local_flags.fill_column) = 0x400; | |
2509 | XFASTINT (buffer_local_flags.left_margin) = 0x800; | |
2510 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; | |
2511 | XFASTINT (buffer_local_flags.display_table) = 0x2000; | |
1ab256cb | 2512 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
54ad07d3 RS |
2513 | #ifdef MSDOS |
2514 | XFASTINT (buffer_local_flags.buffer_file_type) = 0x4000; | |
2515 | #endif | |
1ab256cb RM |
2516 | |
2517 | Vbuffer_alist = Qnil; | |
2518 | current_buffer = 0; | |
2519 | all_buffers = 0; | |
2520 | ||
2521 | QSFundamental = build_string ("Fundamental"); | |
2522 | ||
2523 | Qfundamental_mode = intern ("fundamental-mode"); | |
2524 | buffer_defaults.major_mode = Qfundamental_mode; | |
2525 | ||
2526 | Qmode_class = intern ("mode-class"); | |
2527 | ||
2528 | Qprotected_field = intern ("protected-field"); | |
2529 | ||
2530 | Qpermanent_local = intern ("permanent-local"); | |
2531 | ||
2532 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2533 | ||
2534 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2535 | /* super-magic invisible buffer */ | |
2536 | Vbuffer_alist = Qnil; | |
2537 | ||
ffd56f97 | 2538 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2539 | } |
2540 | ||
2541 | init_buffer () | |
2542 | { | |
2543 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2544 | char *pwd; |
2545 | struct stat dotstat, pwdstat; | |
136351b7 | 2546 | Lisp_Object temp; |
1ab256cb RM |
2547 | |
2548 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2549 | |
2550 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2551 | when PWD is right, and may avoid a fatal error. */ | |
2552 | if ((pwd = getenv ("PWD")) != 0 && *pwd == '/' | |
2553 | && stat (pwd, &pwdstat) == 0 | |
2554 | && stat (".", &dotstat) == 0 | |
2555 | && dotstat.st_ino == pwdstat.st_ino | |
2556 | && dotstat.st_dev == pwdstat.st_dev | |
2557 | && strlen (pwd) < MAXPATHLEN) | |
2558 | strcpy (buf, pwd); | |
2559 | else if (getwd (buf) == 0) | |
1ab256cb RM |
2560 | fatal ("`getwd' failed: %s.\n", buf); |
2561 | ||
2562 | #ifndef VMS | |
2563 | /* Maybe this should really use some standard subroutine | |
2564 | whose definition is filename syntax dependent. */ | |
2565 | if (buf[strlen (buf) - 1] != '/') | |
2566 | strcat (buf, "/"); | |
2567 | #endif /* not VMS */ | |
2568 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2569 | |
2570 | temp = get_minibuffer (0); | |
2571 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2572 | } |
2573 | ||
2574 | /* initialize the buffer routines */ | |
2575 | syms_of_buffer () | |
2576 | { | |
188d4d11 RM |
2577 | extern Lisp_Object Qdisabled; |
2578 | ||
1ab256cb RM |
2579 | staticpro (&Vbuffer_defaults); |
2580 | staticpro (&Vbuffer_local_symbols); | |
2581 | staticpro (&Qfundamental_mode); | |
2582 | staticpro (&Qmode_class); | |
2583 | staticpro (&QSFundamental); | |
2584 | staticpro (&Vbuffer_alist); | |
2585 | staticpro (&Qprotected_field); | |
2586 | staticpro (&Qpermanent_local); | |
2587 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2588 | staticpro (&Qoverlayp); |
9d7608b7 KH |
2589 | Qevaporate = intern ("evaporate"); |
2590 | staticpro (&Qevaporate); | |
294d215f RS |
2591 | staticpro (&Qmodification_hooks); |
2592 | Qmodification_hooks = intern ("modification-hooks"); | |
2593 | staticpro (&Qinsert_in_front_hooks); | |
2594 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2595 | staticpro (&Qinsert_behind_hooks); | |
2596 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2597 | staticpro (&Qget_file_buffer); |
2598 | Qget_file_buffer = intern ("get-file-buffer"); | |
5985d248 KH |
2599 | Qpriority = intern ("priority"); |
2600 | staticpro (&Qpriority); | |
2601 | Qwindow = intern ("window"); | |
2602 | staticpro (&Qwindow); | |
52f8ec73 JB |
2603 | |
2604 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2605 | |
2606 | Fput (Qprotected_field, Qerror_conditions, | |
2607 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2608 | Fput (Qprotected_field, Qerror_message, | |
2609 | build_string ("Attempt to modify a protected field")); | |
2610 | ||
2611 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
2612 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2613 | ||
2614 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2615 | &buffer_defaults.mode_line_format, | |
2616 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2617 | This is the same as (default-value 'mode-line-format)."); | |
2618 | ||
2619 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2620 | &buffer_defaults.abbrev_mode, | |
2621 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2622 | This is the same as (default-value 'abbrev-mode)."); | |
2623 | ||
2624 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2625 | &buffer_defaults.ctl_arrow, | |
2626 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2627 | This is the same as (default-value 'ctl-arrow)."); | |
2628 | ||
2629 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2630 | &buffer_defaults.truncate_lines, | |
2631 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2632 | This is the same as (default-value 'truncate-lines)."); | |
2633 | ||
2634 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2635 | &buffer_defaults.fill_column, | |
2636 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2637 | This is the same as (default-value 'fill-column)."); | |
2638 | ||
2639 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2640 | &buffer_defaults.left_margin, | |
2641 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2642 | This is the same as (default-value 'left-margin)."); | |
2643 | ||
2644 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
2645 | &buffer_defaults.tab_width, | |
2646 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
2647 | This is the same as (default-value 'tab-width)."); | |
2648 | ||
2649 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
2650 | &buffer_defaults.case_fold_search, | |
2651 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
2652 | This is the same as (default-value 'case-fold-search)."); | |
2653 | ||
54ad07d3 RS |
2654 | #ifdef MSDOS |
2655 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", | |
2656 | &buffer_defaults.buffer_file_type, | |
2657 | "Default file type for buffers that do not override it.\n\ | |
2658 | This is the same as (default-value 'buffer-file-type).\n\ | |
2659 | The file type is nil for text, t for binary."); | |
2660 | #endif | |
2661 | ||
0fa3ba92 JB |
2662 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
2663 | Qnil, 0); | |
1ab256cb RM |
2664 | |
2665 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
2666 | But make-docfile finds it! | |
2667 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 2668 | Qnil, |
1ab256cb RM |
2669 | "Template for displaying mode line for current buffer.\n\ |
2670 | Each buffer has its own value of this variable.\n\ | |
2671 | Value may be a string, a symbol or a list or cons cell.\n\ | |
2672 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
2673 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
2674 | in that the %-constructs below are not recognized.\n\ | |
2675 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
2676 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
2677 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
2678 | For a list whose car is a string or list, each element is processed\n\ | |
2679 | recursively and the results are effectively concatenated.\n\ | |
2680 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
2681 | and padded (if the number is positive) or truncated (if negative)\n\ | |
2682 | to the width specified by that number.\n\ | |
2683 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
2684 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
2685 | or when it is found in a cons-cell or a list)\n\ | |
2686 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
2687 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
2688 | % means buffer is read-only and * means it is modified.\n\ | |
2689 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 2690 | %s -- print process status. %l -- print the current line number.\n\ |
dd24e6a6 | 2691 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 2692 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 2693 | or print Bottom or All.\n\ |
1ab256cb | 2694 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 2695 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
2696 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
2697 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2698 | Decimal digits after the % specify field width to which to pad."); | |
2699 | */ | |
2700 | ||
2701 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2702 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2703 | nil here means use current buffer's major mode."); | |
2704 | ||
2705 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2706 | make_number (Lisp_Symbol), |
1ab256cb RM |
2707 | "Symbol for current buffer's major mode."); |
2708 | ||
2709 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2710 | make_number (Lisp_String), |
1ab256cb RM |
2711 | "Pretty name of current buffer's major mode (a string)."); |
2712 | ||
0fa3ba92 | 2713 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2714 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2715 | Automatically becomes buffer-local when set in any fashion."); | |
2716 | ||
2717 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2718 | Qnil, |
1ab256cb RM |
2719 | "*Non-nil if searches should ignore case.\n\ |
2720 | Automatically becomes buffer-local when set in any fashion."); | |
2721 | ||
2722 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2723 | make_number (Lisp_Int), |
1ab256cb RM |
2724 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2725 | Automatically becomes buffer-local when set in any fashion."); | |
2726 | ||
2727 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2728 | make_number (Lisp_Int), |
1ab256cb RM |
2729 | "*Column for the default indent-line-function to indent to.\n\ |
2730 | Linefeed indents to this column in Fundamental mode.\n\ | |
2731 | Automatically becomes buffer-local when set in any fashion."); | |
2732 | ||
2733 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2734 | make_number (Lisp_Int), |
1ab256cb RM |
2735 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2736 | Automatically becomes buffer-local when set in any fashion."); | |
2737 | ||
0fa3ba92 | 2738 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2739 | "*Non-nil means display control chars with uparrow.\n\ |
2740 | Nil means use backslash and octal digits.\n\ | |
2741 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2742 | This variable does not apply to characters whose display is specified\n\ | |
2743 | in the current display table (if there is one)."); | |
2744 | ||
0fa3ba92 | 2745 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2746 | "*Non-nil means do not display continuation lines;\n\ |
2747 | give each line of text one screen line.\n\ | |
2748 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2749 | \n\ | |
2750 | Note that this is overridden by the variable\n\ | |
2751 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2752 | and this buffer is not full-frame width."); |
1ab256cb | 2753 | |
54ad07d3 RS |
2754 | #ifdef MSDOS |
2755 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, | |
2756 | Qnil, | |
2757 | "*If visited file is text, nil; otherwise, t."); | |
2758 | #endif | |
2759 | ||
1ab256cb | 2760 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 2761 | make_number (Lisp_String), |
1ab256cb RM |
2762 | "Name of default directory of current buffer. Should end with slash.\n\ |
2763 | Each buffer has its own value of this variable."); | |
2764 | ||
2765 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 2766 | Qnil, |
1ab256cb RM |
2767 | "Function called (if non-nil) to perform auto-fill.\n\ |
2768 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
2769 | Each buffer has its own value of this variable.\n\ | |
2770 | NOTE: This variable is not an ordinary hook;\n\ | |
2771 | It may not be a list of functions."); | |
2772 | ||
2773 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 2774 | make_number (Lisp_String), |
1ab256cb RM |
2775 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
2776 | Each buffer has its own value of this variable."); | |
2777 | ||
2778 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 2779 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 2780 | make_number (Lisp_String), |
1ab256cb RM |
2781 | "Name of file for auto-saving current buffer,\n\ |
2782 | or nil if buffer should not be auto-saved.\n\ | |
2783 | Each buffer has its own value of this variable."); | |
2784 | ||
0fa3ba92 | 2785 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
2786 | "Non-nil if this buffer is read-only.\n\ |
2787 | Each buffer has its own value of this variable."); | |
2788 | ||
0fa3ba92 | 2789 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
2790 | "Non-nil if this buffer's file has been backed up.\n\ |
2791 | Backing up is done before the first time the file is saved.\n\ | |
2792 | Each buffer has its own value of this variable."); | |
2793 | ||
2794 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 2795 | make_number (Lisp_Int), |
1ab256cb RM |
2796 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
2797 | 0 initially.\n\ | |
2798 | Each buffer has its own value of this variable."); | |
2799 | ||
2800 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 2801 | Qnil, |
1ab256cb RM |
2802 | "Non-nil enables selective display:\n\ |
2803 | Integer N as value means display only lines\n\ | |
2804 | that start with less than n columns of space.\n\ | |
2805 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
2806 | Then ^M's in the file are written into files as newlines.\n\n\ | |
2807 | Automatically becomes buffer-local when set in any fashion."); | |
2808 | ||
2809 | #ifndef old | |
2810 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
2811 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 2812 | Qnil, |
1ab256cb RM |
2813 | "t means display ... on previous line when a line is invisible.\n\ |
2814 | Automatically becomes buffer-local when set in any fashion."); | |
2815 | #endif | |
2816 | ||
0fa3ba92 | 2817 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 2818 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
2819 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
2820 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 2821 | until the tab is filled in.\n\ |
6bbb0d4a | 2822 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
2823 | Automatically becomes buffer-local when set in any fashion."); |
2824 | ||
54939090 RS |
2825 | #if 0 /* The doc string is too long for some compilers, |
2826 | but make-docfile can find it in this comment. */ | |
1ab256cb | 2827 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 2828 | Qnil, |
1ab256cb RM |
2829 | "Display table that controls display of the contents of current buffer.\n\ |
2830 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2831 | The display table is a vector created with `make-display-table'.\n\ | |
2832 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 2833 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 2834 | nil means display the character in the default fashion.\n\ |
a45e35e1 | 2835 | The remaining six elements control the display of\n\ |
6158b3b0 JB |
2836 | the end of a truncated screen line (element 256, a single character);\n\ |
2837 | the end of a continued line (element 257, a single character);\n\ | |
2838 | the escape character used to display character codes in octal\n\ | |
2839 | (element 258, a single character);\n\ | |
2840 | the character used as an arrow for control characters (element 259,\n\ | |
2841 | a single character);\n\ | |
2842 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
a45e35e1 JB |
2843 | a vector of characters);\n\ |
2844 | the character used to draw the border between side-by-side windows\n\ | |
3402827c | 2845 | (element 261, a single character).\n\ |
1ab256cb RM |
2846 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
2847 | Each window can have its own, overriding display table."); | |
54939090 RS |
2848 | #endif |
2849 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 2850 | Qnil, 0); |
1ab256cb | 2851 | |
1ab256cb RM |
2852 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
2853 | "Don't ask."); | |
2854 | */ | |
01050cb5 | 2855 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
2856 | "Function to call before each text change.\n\ |
2857 | Two arguments are passed to the function: the positions of\n\ | |
2858 | the beginning and end of the range of old text to be changed.\n\ | |
2859 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2860 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 2861 | \n\ |
5f079267 | 2862 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
2863 | don't call any before-change or after-change functions.\n\ |
2864 | That's because these variables are temporarily set to nil.\n\ | |
2865 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2866 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2867 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
2868 | Vbefore_change_function = Qnil; |
2869 | ||
2870 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
2871 | "Function to call after each text change.\n\ | |
2872 | Three arguments are passed to the function: the positions of\n\ | |
2873 | the beginning and end of the range of changed text,\n\ | |
2874 | and the length of the pre-change text replaced by that range.\n\ | |
2875 | \(For an insertion, the pre-change length is zero;\n\ | |
2876 | for a deletion, that length is the number of characters deleted,\n\ | |
2877 | and the post-change beginning and end are at the same place.)\n\ | |
2878 | \n\ | |
5f079267 | 2879 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
2880 | don't call any before-change or after-change functions.\n\ |
2881 | That's because these variables are temporarily set to nil.\n\ | |
2882 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2883 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2884 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
2885 | Vafter_change_function = Qnil; |
2886 | ||
5f079267 RS |
2887 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
2888 | "List of functions to call before each text change.\n\ | |
2889 | Two arguments are passed to each function: the positions of\n\ | |
2890 | the beginning and end of the range of old text to be changed.\n\ | |
2891 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2892 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
2893 | \n\ |
2894 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
2895 | don't call any before-change or after-change functions.\n\ |
2896 | That's because these variables are temporarily set to nil.\n\ | |
2897 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2898 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2899 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
2900 | Vbefore_change_functions = Qnil; |
2901 | ||
2902 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
2903 | "List of function to call after each text change.\n\ | |
2904 | Three arguments are passed to each function: the positions of\n\ | |
2905 | the beginning and end of the range of changed text,\n\ | |
2906 | and the length of the pre-change text replaced by that range.\n\ | |
2907 | \(For an insertion, the pre-change length is zero;\n\ | |
2908 | for a deletion, that length is the number of characters deleted,\n\ | |
2909 | and the post-change beginning and end are at the same place.)\n\ | |
2910 | \n\ | |
2911 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
2912 | don't call any before-change or after-change functions.\n\ |
2913 | That's because these variables are temporarily set to nil.\n\ | |
2914 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2915 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2916 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 2917 | |
5f079267 RS |
2918 | Vafter_change_functions = Qnil; |
2919 | ||
dbc4e1c1 JB |
2920 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
2921 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
2922 | The functions are run using the `run-hooks' function."); | |
2923 | Vfirst_change_hook = Qnil; | |
2924 | Qfirst_change_hook = intern ("first-change-hook"); | |
2925 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 2926 | |
54939090 RS |
2927 | #if 0 /* The doc string is too long for some compilers, |
2928 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 2929 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
2930 | "List of undo entries in current buffer.\n\ |
2931 | Recent changes come first; older changes follow newer.\n\ | |
2932 | \n\ | |
2933 | An entry (START . END) represents an insertion which begins at\n\ | |
2934 | position START and ends at position END.\n\ | |
2935 | \n\ | |
2936 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
2937 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
2938 | of the text being deleted; if negative, point was at the end.\n\ | |
2939 | \n\ | |
2940 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
2941 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
2942 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
2943 | modification count of the most recent save is different, this entry is\n\ | |
2944 | obsolete.\n\ | |
2945 | \n\ | |
483c1fd3 RS |
2946 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
2947 | was modified between BEG and END. PROP is the property name,\n\ | |
2948 | and VAL is the old value.\n\ | |
2949 | \n\ | |
bec44fd6 JB |
2950 | An entry of the form POSITION indicates that point was at the buffer\n\ |
2951 | location given by the integer. Undoing an entry of this form places\n\ | |
2952 | point at POSITION.\n\ | |
2953 | \n\ | |
1ab256cb RM |
2954 | nil marks undo boundaries. The undo command treats the changes\n\ |
2955 | between two undo boundaries as a single step to be undone.\n\ | |
2956 | \n\ | |
bec44fd6 | 2957 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
2958 | #endif |
2959 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 2960 | 0); |
1ab256cb | 2961 | |
c48f61ef RS |
2962 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
2963 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
2964 | Automatically local in all buffers."); | |
2965 | ||
2966 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, | |
2967 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
2968 | Vtransient_mark_mode = Qnil; | |
2969 | ||
0a4469c9 | 2970 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
2971 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
2972 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
2973 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
2974 | and disregard a `read-only' text property if the property value\n\ | |
2975 | is a member of the list."); | |
2976 | Vinhibit_read_only = Qnil; | |
2977 | ||
dcdffbf6 RS |
2978 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
2979 | "List of functions called with no args to query before killing a buffer."); | |
2980 | Vkill_buffer_query_functions = Qnil; | |
2981 | ||
1ab256cb RM |
2982 | defsubr (&Sbuffer_list); |
2983 | defsubr (&Sget_buffer); | |
2984 | defsubr (&Sget_file_buffer); | |
2985 | defsubr (&Sget_buffer_create); | |
01050cb5 | 2986 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
2987 | defsubr (&Sbuffer_name); |
2988 | /*defsubr (&Sbuffer_number);*/ | |
2989 | defsubr (&Sbuffer_file_name); | |
2990 | defsubr (&Sbuffer_local_variables); | |
2991 | defsubr (&Sbuffer_modified_p); | |
2992 | defsubr (&Sset_buffer_modified_p); | |
2993 | defsubr (&Sbuffer_modified_tick); | |
2994 | defsubr (&Srename_buffer); | |
2995 | defsubr (&Sother_buffer); | |
2996 | defsubr (&Sbuffer_disable_undo); | |
2997 | defsubr (&Sbuffer_enable_undo); | |
2998 | defsubr (&Skill_buffer); | |
2999 | defsubr (&Serase_buffer); | |
3000 | defsubr (&Sswitch_to_buffer); | |
3001 | defsubr (&Spop_to_buffer); | |
3002 | defsubr (&Scurrent_buffer); | |
3003 | defsubr (&Sset_buffer); | |
3004 | defsubr (&Sbarf_if_buffer_read_only); | |
3005 | defsubr (&Sbury_buffer); | |
3006 | defsubr (&Slist_buffers); | |
3007 | defsubr (&Skill_all_local_variables); | |
2eec3b4e | 3008 | |
52f8ec73 | 3009 | defsubr (&Soverlayp); |
2eec3b4e RS |
3010 | defsubr (&Smake_overlay); |
3011 | defsubr (&Sdelete_overlay); | |
3012 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
3013 | defsubr (&Soverlay_start); |
3014 | defsubr (&Soverlay_end); | |
3015 | defsubr (&Soverlay_buffer); | |
3016 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
3017 | defsubr (&Soverlays_at); |
3018 | defsubr (&Snext_overlay_change); | |
239c932b | 3019 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
3020 | defsubr (&Soverlay_recenter); |
3021 | defsubr (&Soverlay_lists); | |
3022 | defsubr (&Soverlay_get); | |
3023 | defsubr (&Soverlay_put); | |
1ab256cb RM |
3024 | } |
3025 | ||
3026 | keys_of_buffer () | |
3027 | { | |
3028 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
3029 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
3030 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
4158c17d RM |
3031 | |
3032 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
3033 | initialized when that function gets called. */ | |
3034 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 3035 | } |