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. | |
2eec3b4e RS |
1298 | |
1299 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1300 | when this function is called. |
1301 | ||
1302 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1303 | If EXTEND is zero, we never extend the vector, | |
1304 | and we store only as many overlays as will fit. | |
1305 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1306 | |
1307 | int | |
61d54cd5 | 1308 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr) |
2eec3b4e | 1309 | int pos; |
61d54cd5 | 1310 | int extend; |
2eec3b4e RS |
1311 | Lisp_Object **vec_ptr; |
1312 | int *len_ptr; | |
1313 | int *next_ptr; | |
1ab256cb | 1314 | { |
2eec3b4e RS |
1315 | Lisp_Object tail, overlay, start, end, result; |
1316 | int idx = 0; | |
1317 | int len = *len_ptr; | |
1318 | Lisp_Object *vec = *vec_ptr; | |
1319 | int next = ZV; | |
61d54cd5 RS |
1320 | int inhibit_storing = 0; |
1321 | ||
2eec3b4e | 1322 | for (tail = current_buffer->overlays_before; |
4a44b14c | 1323 | XGCTYPE (tail) == Lisp_Cons; |
2eec3b4e RS |
1324 | tail = XCONS (tail)->cdr) |
1325 | { | |
52f8ec73 JB |
1326 | int startpos; |
1327 | ||
2eec3b4e | 1328 | overlay = XCONS (tail)->car; |
3ccf510a | 1329 | if (XGCTYPE (overlay) != Lisp_Overlay) |
52f8ec73 | 1330 | abort (); |
1ab256cb | 1331 | |
2eec3b4e RS |
1332 | start = OVERLAY_START (overlay); |
1333 | end = OVERLAY_END (overlay); | |
1334 | if (OVERLAY_POSITION (end) <= pos) | |
1335 | break; | |
1336 | startpos = OVERLAY_POSITION (start); | |
1337 | if (startpos <= pos) | |
1338 | { | |
1339 | if (idx == len) | |
1340 | { | |
61d54cd5 RS |
1341 | /* The supplied vector is full. |
1342 | Either make it bigger, or don't store any more in it. */ | |
1343 | if (extend) | |
1344 | { | |
1345 | *len_ptr = len *= 2; | |
1346 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1347 | *vec_ptr = vec; | |
1348 | } | |
1349 | else | |
1350 | inhibit_storing = 1; | |
2eec3b4e | 1351 | } |
61d54cd5 RS |
1352 | |
1353 | if (!inhibit_storing) | |
1354 | vec[idx] = overlay; | |
1355 | /* Keep counting overlays even if we can't return them all. */ | |
1356 | idx++; | |
2eec3b4e RS |
1357 | } |
1358 | else if (startpos < next) | |
1359 | next = startpos; | |
1360 | } | |
1361 | ||
1362 | for (tail = current_buffer->overlays_after; | |
4a44b14c | 1363 | XGCTYPE (tail) == Lisp_Cons; |
2eec3b4e | 1364 | tail = XCONS (tail)->cdr) |
1ab256cb | 1365 | { |
52f8ec73 JB |
1366 | int startpos; |
1367 | ||
2eec3b4e | 1368 | overlay = XCONS (tail)->car; |
3ccf510a | 1369 | if (XGCTYPE (overlay) != Lisp_Overlay) |
52f8ec73 | 1370 | abort (); |
2eec3b4e RS |
1371 | |
1372 | start = OVERLAY_START (overlay); | |
1373 | end = OVERLAY_END (overlay); | |
1374 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1375 | if (pos < startpos) |
2eec3b4e RS |
1376 | { |
1377 | if (startpos < next) | |
1378 | next = startpos; | |
1379 | break; | |
1380 | } | |
52f8ec73 | 1381 | if (pos < OVERLAY_POSITION (end)) |
2eec3b4e RS |
1382 | { |
1383 | if (idx == len) | |
1384 | { | |
61d54cd5 RS |
1385 | if (extend) |
1386 | { | |
1387 | *len_ptr = len *= 2; | |
1388 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1389 | *vec_ptr = vec; | |
1390 | } | |
1391 | else | |
1392 | inhibit_storing = 1; | |
2eec3b4e | 1393 | } |
61d54cd5 RS |
1394 | |
1395 | if (!inhibit_storing) | |
1396 | vec[idx] = overlay; | |
1397 | idx++; | |
2eec3b4e | 1398 | } |
1ab256cb RM |
1399 | } |
1400 | ||
2eec3b4e RS |
1401 | *next_ptr = next; |
1402 | return idx; | |
1403 | } | |
1404 | \f | |
5985d248 KH |
1405 | struct sortvec |
1406 | { | |
1407 | Lisp_Object overlay; | |
1408 | int beg, end; | |
1409 | int priority; | |
1410 | }; | |
1411 | ||
1412 | static int | |
1413 | compare_overlays (s1, s2) | |
1414 | struct sortvec *s1, *s2; | |
1415 | { | |
1416 | if (s1->priority != s2->priority) | |
1417 | return s1->priority - s2->priority; | |
1418 | if (s1->beg != s2->beg) | |
1419 | return s1->beg - s2->beg; | |
1420 | if (s1->end != s2->end) | |
1421 | return s2->end - s1->end; | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | /* Sort an array of overlays by priority. The array is modified in place. | |
1426 | The return value is the new size; this may be smaller than the original | |
1427 | size if some of the overlays were invalid or were window-specific. */ | |
1428 | int | |
1429 | sort_overlays (overlay_vec, noverlays, w) | |
1430 | Lisp_Object *overlay_vec; | |
1431 | int noverlays; | |
1432 | struct window *w; | |
1433 | { | |
1434 | int i, j; | |
1435 | struct sortvec *sortvec; | |
1436 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1437 | ||
1438 | /* Put the valid and relevant overlays into sortvec. */ | |
1439 | ||
1440 | for (i = 0, j = 0; i < noverlays; i++) | |
1441 | { | |
0fa767e7 | 1442 | Lisp_Object tem; |
c99fc30f | 1443 | Lisp_Object overlay; |
5985d248 | 1444 | |
c99fc30f | 1445 | overlay = overlay_vec[i]; |
5985d248 KH |
1446 | if (OVERLAY_VALID (overlay) |
1447 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1448 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1449 | { | |
0fa767e7 KH |
1450 | /* If we're interested in a specific window, then ignore |
1451 | overlays that are limited to some other window. */ | |
1452 | if (w) | |
5985d248 | 1453 | { |
0fa767e7 KH |
1454 | Lisp_Object window; |
1455 | ||
1456 | window = Foverlay_get (overlay, Qwindow); | |
1457 | if (XTYPE (window) == Lisp_Window && XWINDOW (window) != w) | |
1458 | continue; | |
5985d248 | 1459 | } |
0fa767e7 KH |
1460 | |
1461 | /* This overlay is good and counts: put it into sortvec. */ | |
1462 | sortvec[j].overlay = overlay; | |
1463 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1464 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1465 | tem = Foverlay_get (overlay, Qpriority); | |
1466 | if (INTEGERP (tem)) | |
1467 | sortvec[j].priority = XINT (tem); | |
1468 | else | |
1469 | sortvec[j].priority = 0; | |
1470 | j++; | |
5985d248 KH |
1471 | } |
1472 | } | |
1473 | noverlays = j; | |
1474 | ||
1475 | /* Sort the overlays into the proper order: increasing priority. */ | |
1476 | ||
1477 | if (noverlays > 1) | |
1478 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
1479 | ||
1480 | for (i = 0; i < noverlays; i++) | |
1481 | overlay_vec[i] = sortvec[i].overlay; | |
1482 | return (noverlays); | |
1483 | } | |
1484 | \f | |
5c4f68f1 | 1485 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1486 | |
2eec3b4e | 1487 | void |
5c4f68f1 JB |
1488 | recenter_overlay_lists (buf, pos) |
1489 | struct buffer *buf; | |
2eec3b4e RS |
1490 | int pos; |
1491 | { | |
1492 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1493 | ||
1494 | /* See if anything in overlays_before should move to overlays_after. */ | |
1495 | ||
1496 | /* We don't strictly need prev in this loop; it should always be nil. | |
1497 | But we use it for symmetry and in case that should cease to be true | |
1498 | with some future change. */ | |
1499 | prev = Qnil; | |
5c4f68f1 | 1500 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1501 | CONSP (tail); |
1502 | prev = tail, tail = next) | |
1ab256cb | 1503 | { |
2eec3b4e RS |
1504 | next = XCONS (tail)->cdr; |
1505 | overlay = XCONS (tail)->car; | |
1506 | ||
1507 | /* If the overlay is not valid, get rid of it. */ | |
1508 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1509 | #if 1 |
1510 | abort (); | |
1511 | #else | |
2eec3b4e RS |
1512 | { |
1513 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1514 | if (!NILP (prev)) | |
1515 | XCONS (prev)->cdr = next; | |
1516 | else | |
5c4f68f1 | 1517 | buf->overlays_before = next; |
2eec3b4e RS |
1518 | tail = prev; |
1519 | continue; | |
1520 | } | |
52f8ec73 | 1521 | #endif |
1ab256cb | 1522 | |
2eec3b4e RS |
1523 | beg = OVERLAY_START (overlay); |
1524 | end = OVERLAY_END (overlay); | |
1ab256cb | 1525 | |
2eec3b4e | 1526 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1527 | { |
2eec3b4e RS |
1528 | /* OVERLAY needs to be moved. */ |
1529 | int where = OVERLAY_POSITION (beg); | |
1530 | Lisp_Object other, other_prev; | |
1531 | ||
1532 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1533 | if (!NILP (prev)) | |
1534 | XCONS (prev)->cdr = next; | |
1535 | else | |
5c4f68f1 | 1536 | buf->overlays_before = next; |
2eec3b4e RS |
1537 | |
1538 | /* Search thru overlays_after for where to put it. */ | |
1539 | other_prev = Qnil; | |
5c4f68f1 | 1540 | for (other = buf->overlays_after; |
2eec3b4e RS |
1541 | CONSP (other); |
1542 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1543 | { |
2eec3b4e RS |
1544 | Lisp_Object otherbeg, otheroverlay, follower; |
1545 | int win; | |
1546 | ||
1547 | otheroverlay = XCONS (other)->car; | |
1548 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1549 | abort (); |
2eec3b4e RS |
1550 | |
1551 | otherbeg = OVERLAY_START (otheroverlay); | |
1552 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1553 | break; | |
1ab256cb | 1554 | } |
2eec3b4e RS |
1555 | |
1556 | /* Add TAIL to overlays_after before OTHER. */ | |
1557 | XCONS (tail)->cdr = other; | |
1558 | if (!NILP (other_prev)) | |
1559 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1560 | else |
5c4f68f1 | 1561 | buf->overlays_after = tail; |
2eec3b4e | 1562 | tail = prev; |
1ab256cb | 1563 | } |
2eec3b4e RS |
1564 | else |
1565 | /* We've reached the things that should stay in overlays_before. | |
1566 | All the rest of overlays_before must end even earlier, | |
1567 | so stop now. */ | |
1568 | break; | |
1569 | } | |
1570 | ||
1571 | /* See if anything in overlays_after should be in overlays_before. */ | |
1572 | prev = Qnil; | |
5c4f68f1 | 1573 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1574 | CONSP (tail); |
1575 | prev = tail, tail = next) | |
1576 | { | |
1577 | next = XCONS (tail)->cdr; | |
1578 | overlay = XCONS (tail)->car; | |
1579 | ||
1580 | /* If the overlay is not valid, get rid of it. */ | |
1581 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1582 | #if 1 |
1583 | abort (); | |
1584 | #else | |
2eec3b4e RS |
1585 | { |
1586 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1587 | if (!NILP (prev)) | |
1588 | XCONS (prev)->cdr = next; | |
1589 | else | |
5c4f68f1 | 1590 | buf->overlays_after = next; |
2eec3b4e RS |
1591 | tail = prev; |
1592 | continue; | |
1593 | } | |
52f8ec73 | 1594 | #endif |
2eec3b4e RS |
1595 | |
1596 | beg = OVERLAY_START (overlay); | |
1597 | end = OVERLAY_END (overlay); | |
1598 | ||
1599 | /* Stop looking, when we know that nothing further | |
1600 | can possibly end before POS. */ | |
1601 | if (OVERLAY_POSITION (beg) > pos) | |
1602 | break; | |
1603 | ||
1604 | if (OVERLAY_POSITION (end) <= pos) | |
1605 | { | |
1606 | /* OVERLAY needs to be moved. */ | |
1607 | int where = OVERLAY_POSITION (end); | |
1608 | Lisp_Object other, other_prev; | |
1609 | ||
1610 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1611 | if (!NILP (prev)) | |
1612 | XCONS (prev)->cdr = next; | |
1613 | else | |
5c4f68f1 | 1614 | buf->overlays_after = next; |
2eec3b4e RS |
1615 | |
1616 | /* Search thru overlays_before for where to put it. */ | |
1617 | other_prev = Qnil; | |
5c4f68f1 | 1618 | for (other = buf->overlays_before; |
2eec3b4e RS |
1619 | CONSP (other); |
1620 | other_prev = other, other = XCONS (other)->cdr) | |
1621 | { | |
1622 | Lisp_Object otherend, otheroverlay; | |
1623 | int win; | |
1624 | ||
1625 | otheroverlay = XCONS (other)->car; | |
1626 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1627 | abort (); |
2eec3b4e RS |
1628 | |
1629 | otherend = OVERLAY_END (otheroverlay); | |
1630 | if (OVERLAY_POSITION (otherend) <= where) | |
1631 | break; | |
1632 | } | |
1633 | ||
1634 | /* Add TAIL to overlays_before before OTHER. */ | |
1635 | XCONS (tail)->cdr = other; | |
1636 | if (!NILP (other_prev)) | |
1637 | XCONS (other_prev)->cdr = tail; | |
1638 | else | |
5c4f68f1 | 1639 | buf->overlays_before = tail; |
2eec3b4e RS |
1640 | tail = prev; |
1641 | } | |
1642 | } | |
1643 | ||
5c4f68f1 | 1644 | XFASTINT (buf->overlay_center) = pos; |
2eec3b4e | 1645 | } |
2b1bdf65 KH |
1646 | |
1647 | /* Fix up overlays that were garbled as a result of permuting markers | |
1648 | in the range START through END. Any overlay with at least one | |
1649 | endpoint in this range will need to be unlinked from the overlay | |
1650 | list and reinserted in its proper place. | |
1651 | Such an overlay might even have negative size at this point. | |
1652 | If so, we'll reverse the endpoints. Can you think of anything | |
1653 | better to do in this situation? */ | |
1654 | void | |
1655 | fix_overlays_in_range (start, end) | |
1656 | register int start, end; | |
1657 | { | |
1658 | Lisp_Object tem, overlay; | |
1659 | Lisp_Object before_list, after_list; | |
1660 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
1661 | int startpos, endpos; | |
1662 | ||
1663 | /* This algorithm shifts links around instead of consing and GCing. | |
1664 | The loop invariant is that before_list (resp. after_list) is a | |
1665 | well-formed list except that its last element, the one that | |
1666 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
1667 | So it's not a bug that before_list isn't initialized, although | |
1668 | it may look strange. */ | |
1669 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
1670 | { | |
1671 | overlay = XCONS (*ptail)->car; | |
1672 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1673 | if (endpos < start) | |
1674 | break; | |
1675 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1676 | if (endpos < end | |
1677 | || (startpos >= start && startpos < end)) | |
1678 | { | |
1679 | /* If the overlay is backwards, fix that now. */ | |
1680 | if (startpos > endpos) | |
1681 | { | |
1682 | int tem; | |
1683 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1684 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1685 | tem = startpos; startpos = endpos; endpos = tem; | |
1686 | } | |
1687 | /* Add it to the end of the wrong list. Later on, | |
1688 | recenter_overlay_lists will move it to the right place. */ | |
1689 | if (endpos < XINT (current_buffer->overlay_center)) | |
1690 | { | |
1691 | *pafter = *ptail; | |
1692 | pafter = &XCONS (*ptail)->cdr; | |
1693 | } | |
1694 | else | |
1695 | { | |
1696 | *pbefore = *ptail; | |
1697 | pbefore = &XCONS (*ptail)->cdr; | |
1698 | } | |
1699 | *ptail = XCONS (*ptail)->cdr; | |
1700 | } | |
1701 | else | |
1702 | ptail = &XCONS (*ptail)->cdr; | |
1703 | } | |
1704 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
1705 | { | |
1706 | overlay = XCONS (*ptail)->car; | |
1707 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1708 | if (startpos >= end) | |
1709 | break; | |
1710 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1711 | if (startpos >= start | |
1712 | || (endpos >= start && endpos < end)) | |
1713 | { | |
1714 | if (startpos > endpos) | |
1715 | { | |
1716 | int tem; | |
1717 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1718 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1719 | tem = startpos; startpos = endpos; endpos = tem; | |
1720 | } | |
1721 | if (endpos < XINT (current_buffer->overlay_center)) | |
1722 | { | |
1723 | *pafter = *ptail; | |
1724 | pafter = &XCONS (*ptail)->cdr; | |
1725 | } | |
1726 | else | |
1727 | { | |
1728 | *pbefore = *ptail; | |
1729 | pbefore = &XCONS (*ptail)->cdr; | |
1730 | } | |
1731 | *ptail = XCONS (*ptail)->cdr; | |
1732 | } | |
1733 | else | |
1734 | ptail = &XCONS (*ptail)->cdr; | |
1735 | } | |
1736 | ||
1737 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
1738 | and let the recenter function make it sane again. */ | |
1739 | *pbefore = current_buffer->overlays_before; | |
1740 | current_buffer->overlays_before = before_list; | |
1741 | recenter_overlay_lists (current_buffer, | |
1742 | XINT (current_buffer->overlay_center)); | |
1743 | ||
1744 | *pafter = current_buffer->overlays_after; | |
1745 | current_buffer->overlays_after = after_list; | |
1746 | recenter_overlay_lists (current_buffer, | |
1747 | XINT (current_buffer->overlay_center)); | |
1748 | } | |
2eec3b4e | 1749 | \f |
52f8ec73 JB |
1750 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1751 | "Return t if OBJECT is an overlay.") | |
1752 | (object) | |
1753 | Lisp_Object object; | |
1754 | { | |
1755 | return (OVERLAYP (object) ? Qt : Qnil); | |
1756 | } | |
1757 | ||
5c4f68f1 JB |
1758 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1759 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1760 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1761 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1762 | (beg, end, buffer) |
1763 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1764 | { |
1765 | Lisp_Object overlay; | |
5c4f68f1 | 1766 | struct buffer *b; |
2eec3b4e | 1767 | |
5c4f68f1 JB |
1768 | if (NILP (buffer)) |
1769 | XSET (buffer, Lisp_Buffer, current_buffer); | |
883047b9 JB |
1770 | else |
1771 | CHECK_BUFFER (buffer, 2); | |
1772 | if (MARKERP (beg) | |
1773 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1774 | error ("Marker points into wrong buffer"); | |
1775 | if (MARKERP (end) | |
1776 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1777 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 1778 | |
883047b9 JB |
1779 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1780 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 1781 | |
883047b9 | 1782 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 1783 | { |
c99fc30f KH |
1784 | Lisp_Object temp; |
1785 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 1786 | } |
883047b9 JB |
1787 | |
1788 | b = XBUFFER (buffer); | |
1789 | ||
1790 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
1791 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 JB |
1792 | |
1793 | overlay = Fcons (Fcons (beg, end), Qnil); | |
52f8ec73 | 1794 | XSETTYPE (overlay, Lisp_Overlay); |
2eec3b4e RS |
1795 | |
1796 | /* Put the new overlay on the wrong list. */ | |
1797 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1798 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1799 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1800 | else |
5c4f68f1 | 1801 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1802 | |
1803 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1804 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1805 | |
b61982dd JB |
1806 | /* We don't need to redisplay the region covered by the overlay, because |
1807 | the overlay has no properties at the moment. */ | |
1808 | ||
2eec3b4e RS |
1809 | return overlay; |
1810 | } | |
1811 | ||
5c4f68f1 JB |
1812 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
1813 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
1814 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
1815 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
1816 | buffer.") | |
5c4f68f1 JB |
1817 | (overlay, beg, end, buffer) |
1818 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 1819 | { |
0a4469c9 RS |
1820 | struct buffer *b, *ob; |
1821 | Lisp_Object obuffer; | |
1822 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 1823 | |
52f8ec73 | 1824 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
1825 | if (NILP (buffer)) |
1826 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a JB |
1827 | if (NILP (buffer)) |
1828 | XSET (buffer, Lisp_Buffer, current_buffer); | |
5c4f68f1 | 1829 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
1830 | |
1831 | if (MARKERP (beg) | |
1832 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1833 | error ("Marker points into wrong buffer"); | |
1834 | if (MARKERP (end) | |
1835 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1836 | error ("Marker points into wrong buffer"); | |
1837 | ||
b61982dd JB |
1838 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1839 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
1840 | ||
9d7608b7 KH |
1841 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
1842 | return Fdelete_overlay (overlay); | |
0a4469c9 | 1843 | |
b61982dd JB |
1844 | if (XINT (beg) > XINT (end)) |
1845 | { | |
c99fc30f KH |
1846 | Lisp_Object temp; |
1847 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
1848 | } |
1849 | ||
9d7608b7 KH |
1850 | specbind (Qinhibit_quit, Qt); |
1851 | ||
0a4469c9 | 1852 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 1853 | b = XBUFFER (buffer); |
0a4469c9 | 1854 | ob = XBUFFER (obuffer); |
2eec3b4e | 1855 | |
c82ed728 | 1856 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 1857 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
1858 | { |
1859 | /* Redisplay where the overlay was. */ | |
1860 | if (!NILP (obuffer)) | |
1861 | { | |
1862 | Lisp_Object o_beg; | |
1863 | Lisp_Object o_end; | |
1864 | ||
1865 | o_beg = OVERLAY_START (overlay); | |
1866 | o_end = OVERLAY_END (overlay); | |
1867 | o_beg = OVERLAY_POSITION (o_beg); | |
1868 | o_end = OVERLAY_POSITION (o_end); | |
1869 | ||
efd90478 | 1870 | redisplay_region (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
1871 | } |
1872 | ||
1873 | /* Redisplay where the overlay is going to be. */ | |
efd90478 | 1874 | redisplay_region (b, XINT (beg), XINT (end)); |
50760c4a RS |
1875 | |
1876 | /* Don't limit redisplay to the selected window. */ | |
1877 | windows_or_buffers_changed = 1; | |
1878 | } | |
c82ed728 JB |
1879 | else |
1880 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
1881 | { | |
be8b1c6b RS |
1882 | Lisp_Object o_beg; |
1883 | Lisp_Object o_end; | |
c82ed728 JB |
1884 | int change_beg, change_end; |
1885 | ||
be8b1c6b RS |
1886 | o_beg = OVERLAY_START (overlay); |
1887 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
1888 | o_beg = OVERLAY_POSITION (o_beg); |
1889 | o_end = OVERLAY_POSITION (o_end); | |
1890 | ||
1891 | if (XINT (o_beg) == XINT (beg)) | |
1892 | redisplay_region (b, XINT (o_end), XINT (end)); | |
1893 | else if (XINT (o_end) == XINT (end)) | |
1894 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
1895 | else | |
1896 | { | |
1897 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
1898 | if (XINT (end) > XINT (o_end)) o_end = end; | |
1899 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
1900 | } | |
1901 | } | |
b61982dd | 1902 | |
0a4469c9 RS |
1903 | if (!NILP (obuffer)) |
1904 | { | |
1905 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
1906 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
1907 | } | |
5c4f68f1 JB |
1908 | |
1909 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
1910 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
1911 | |
1912 | /* Put the overlay on the wrong list. */ | |
1913 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1914 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1915 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1916 | else |
5c4f68f1 | 1917 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1918 | |
1919 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1920 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1921 | |
0a4469c9 | 1922 | return unbind_to (count, overlay); |
2eec3b4e RS |
1923 | } |
1924 | ||
1925 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 1926 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 1927 | (overlay) |
5c4f68f1 | 1928 | Lisp_Object overlay; |
2eec3b4e | 1929 | { |
0a4469c9 | 1930 | Lisp_Object buffer; |
5c4f68f1 | 1931 | struct buffer *b; |
0a4469c9 | 1932 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 1933 | |
52f8ec73 JB |
1934 | CHECK_OVERLAY (overlay, 0); |
1935 | ||
0a4469c9 RS |
1936 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
1937 | if (NILP (buffer)) | |
1938 | return Qnil; | |
1939 | ||
1940 | b = XBUFFER (buffer); | |
1941 | ||
1942 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
1943 | |
1944 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
1945 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
1946 | ||
b61982dd | 1947 | redisplay_region (b, |
a927f5c9 RS |
1948 | marker_position (OVERLAY_START (overlay)), |
1949 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 1950 | |
3ece337a JB |
1951 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
1952 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
1953 | ||
0a4469c9 | 1954 | return unbind_to (count, Qnil); |
2eec3b4e RS |
1955 | } |
1956 | \f | |
8ebafa8d JB |
1957 | /* Overlay dissection functions. */ |
1958 | ||
1959 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
1960 | "Return the position at which OVERLAY starts.") | |
1961 | (overlay) | |
1962 | Lisp_Object overlay; | |
1963 | { | |
1964 | CHECK_OVERLAY (overlay, 0); | |
1965 | ||
1966 | return (Fmarker_position (OVERLAY_START (overlay))); | |
1967 | } | |
1968 | ||
1969 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
1970 | "Return the position at which OVERLAY ends.") | |
1971 | (overlay) | |
1972 | Lisp_Object overlay; | |
1973 | { | |
1974 | CHECK_OVERLAY (overlay, 0); | |
1975 | ||
1976 | return (Fmarker_position (OVERLAY_END (overlay))); | |
1977 | } | |
1978 | ||
1979 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
1980 | "Return the buffer OVERLAY belongs to.") | |
1981 | (overlay) | |
1982 | Lisp_Object overlay; | |
1983 | { | |
1984 | CHECK_OVERLAY (overlay, 0); | |
1985 | ||
1986 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
1987 | } | |
1988 | ||
1989 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
1990 | "Return a list of the properties on OVERLAY.\n\ | |
1991 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
1992 | OVERLAY.") | |
1993 | (overlay) | |
1994 | Lisp_Object overlay; | |
1995 | { | |
1996 | CHECK_OVERLAY (overlay, 0); | |
1997 | ||
1998 | return Fcopy_sequence (Fcdr_safe (XCONS (overlay)->cdr)); | |
1999 | } | |
2000 | ||
2001 | \f | |
2eec3b4e | 2002 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2003 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2004 | (pos) |
2005 | Lisp_Object pos; | |
2006 | { | |
2007 | int noverlays; | |
2008 | int endpos; | |
2009 | Lisp_Object *overlay_vec; | |
2010 | int len; | |
2011 | Lisp_Object result; | |
2012 | ||
2013 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2014 | ||
2015 | len = 10; | |
2016 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2017 | ||
2018 | /* Put all the overlays we want in a vector in overlay_vec. | |
2019 | Store the length in len. */ | |
61d54cd5 | 2020 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos); |
2eec3b4e RS |
2021 | |
2022 | /* Make a list of them all. */ | |
2023 | result = Flist (noverlays, overlay_vec); | |
2024 | ||
9ac0d9e0 | 2025 | xfree (overlay_vec); |
2eec3b4e RS |
2026 | return result; |
2027 | } | |
2028 | ||
2029 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
2030 | 1, 1, 0, | |
bbe20e81 KH |
2031 | "Return the next position after POS where an overlay starts or ends.\n\ |
2032 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2033 | (pos) |
2034 | Lisp_Object pos; | |
2035 | { | |
2036 | int noverlays; | |
2037 | int endpos; | |
2038 | Lisp_Object *overlay_vec; | |
2039 | int len; | |
2040 | Lisp_Object result; | |
2041 | int i; | |
2042 | ||
2043 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2044 | ||
2045 | len = 10; | |
2046 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2047 | ||
2048 | /* Put all the overlays we want in a vector in overlay_vec. | |
2049 | Store the length in len. | |
2050 | endpos gets the position where the next overlay starts. */ | |
61d54cd5 | 2051 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos); |
2eec3b4e RS |
2052 | |
2053 | /* If any of these overlays ends before endpos, | |
2054 | use its ending point instead. */ | |
2055 | for (i = 0; i < noverlays; i++) | |
2056 | { | |
2057 | Lisp_Object oend; | |
2058 | int oendpos; | |
2059 | ||
2060 | oend = OVERLAY_END (overlay_vec[i]); | |
2061 | oendpos = OVERLAY_POSITION (oend); | |
2062 | if (oendpos < endpos) | |
2063 | endpos = oendpos; | |
1ab256cb RM |
2064 | } |
2065 | ||
9ac0d9e0 | 2066 | xfree (overlay_vec); |
2eec3b4e RS |
2067 | return make_number (endpos); |
2068 | } | |
2069 | \f | |
2070 | /* These functions are for debugging overlays. */ | |
2071 | ||
2072 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2073 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2074 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2075 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2076 | Recentering overlays moves overlays between these lists.\n\ |
2077 | The lists you get are copies, so that changing them has no effect.\n\ | |
2078 | However, the overlays you get are the real objects that the buffer uses.") | |
2079 | () | |
2080 | { | |
2081 | Lisp_Object before, after; | |
2082 | before = current_buffer->overlays_before; | |
2083 | if (CONSP (before)) | |
2084 | before = Fcopy_sequence (before); | |
2085 | after = current_buffer->overlays_after; | |
2086 | if (CONSP (after)) | |
2087 | after = Fcopy_sequence (after); | |
2088 | ||
2089 | return Fcons (before, after); | |
2090 | } | |
2091 | ||
2092 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
2093 | "Recenter the overlays of the current buffer around position POS.") | |
2094 | (pos) | |
2095 | Lisp_Object pos; | |
2096 | { | |
2097 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2098 | ||
5c4f68f1 | 2099 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
2100 | return Qnil; |
2101 | } | |
2102 | \f | |
2103 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
2104 | "Get the property of overlay OVERLAY with property name NAME.") | |
2105 | (overlay, prop) | |
2106 | Lisp_Object overlay, prop; | |
2107 | { | |
2108 | Lisp_Object plist; | |
52f8ec73 JB |
2109 | |
2110 | CHECK_OVERLAY (overlay, 0); | |
2111 | ||
2112 | for (plist = Fcdr_safe (XCONS (overlay)->cdr); | |
2eec3b4e RS |
2113 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
2114 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
2115 | { | |
2116 | if (EQ (XCONS (plist)->car, prop)) | |
2117 | return XCONS (XCONS (plist)->cdr)->car; | |
2118 | } | |
52f8ec73 JB |
2119 | |
2120 | return Qnil; | |
2eec3b4e RS |
2121 | } |
2122 | ||
2123 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
2124 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
2125 | (overlay, prop, value) | |
2126 | Lisp_Object overlay, prop, value; | |
2127 | { | |
274a9425 | 2128 | Lisp_Object plist, tail, buffer; |
9d7608b7 | 2129 | int changed; |
2eec3b4e | 2130 | |
52f8ec73 | 2131 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 2132 | |
274a9425 RS |
2133 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2134 | ||
52f8ec73 | 2135 | plist = Fcdr_safe (XCONS (overlay)->cdr); |
2eec3b4e RS |
2136 | |
2137 | for (tail = plist; | |
2138 | CONSP (tail) && CONSP (XCONS (tail)->cdr); | |
2139 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
2140 | if (EQ (XCONS (tail)->car, prop)) |
2141 | { | |
9d7608b7 KH |
2142 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
2143 | XCONS (XCONS (tail)->cdr)->car = value; | |
2144 | goto found; | |
274a9425 | 2145 | } |
9d7608b7 KH |
2146 | /* It wasn't in the list, so add it to the front. */ |
2147 | changed = !NILP (value); | |
2eec3b4e RS |
2148 | if (! CONSP (XCONS (overlay)->cdr)) |
2149 | XCONS (overlay)->cdr = Fcons (Qnil, Qnil); | |
9d7608b7 KH |
2150 | XCONS (XCONS (overlay)->cdr)->cdr = Fcons (prop, Fcons (value, plist)); |
2151 | found: | |
2152 | if (! NILP (buffer)) | |
2153 | { | |
2154 | if (changed) | |
2155 | redisplay_region (XBUFFER (buffer), | |
2156 | marker_position (OVERLAY_START (overlay)), | |
2157 | marker_position (OVERLAY_END (overlay))); | |
2158 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
2159 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
2160 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
2161 | Fdelete_overlay (overlay); | |
2162 | } | |
2eec3b4e | 2163 | return value; |
1ab256cb RM |
2164 | } |
2165 | \f | |
173f2a64 RS |
2166 | /* Run the modification-hooks of overlays that include |
2167 | any part of the text in START to END. | |
2168 | Run the insert-before-hooks of overlay starting at END, | |
2169 | and the insert-after-hooks of overlay ending at START. */ | |
2170 | ||
2171 | void | |
2172 | verify_overlay_modification (start, end) | |
2173 | Lisp_Object start, end; | |
2174 | { | |
2175 | Lisp_Object prop, overlay, tail; | |
2176 | int insertion = EQ (start, end); | |
55b48893 RS |
2177 | int tail_copied; |
2178 | struct gcpro gcpro1, gcpro2; | |
2179 | ||
2180 | overlay = Qnil; | |
2181 | tail = Qnil; | |
2182 | GCPRO2 (overlay, tail); | |
173f2a64 | 2183 | |
55b48893 | 2184 | tail_copied = 0; |
173f2a64 RS |
2185 | for (tail = current_buffer->overlays_before; |
2186 | CONSP (tail); | |
2187 | tail = XCONS (tail)->cdr) | |
2188 | { | |
2189 | int startpos, endpos; | |
be8b1c6b | 2190 | Lisp_Object ostart, oend; |
173f2a64 RS |
2191 | |
2192 | overlay = XCONS (tail)->car; | |
2193 | ||
2194 | ostart = OVERLAY_START (overlay); | |
2195 | oend = OVERLAY_END (overlay); | |
2196 | endpos = OVERLAY_POSITION (oend); | |
2197 | if (XFASTINT (start) > endpos) | |
2198 | break; | |
2199 | startpos = OVERLAY_POSITION (ostart); | |
2200 | if (XFASTINT (end) == startpos && insertion) | |
2201 | { | |
2202 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2203 | if (!NILP (prop)) |
2204 | { | |
2205 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
2206 | if (!tail_copied) |
2207 | tail = Fcopy_sequence (tail); | |
2208 | tail_copied = 1; | |
5fb5aa33 RS |
2209 | call_overlay_mod_hooks (prop, overlay, start, end); |
2210 | } | |
173f2a64 RS |
2211 | } |
2212 | if (XFASTINT (start) == endpos && insertion) | |
2213 | { | |
2214 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2215 | if (!NILP (prop)) |
2216 | { | |
55b48893 RS |
2217 | if (!tail_copied) |
2218 | tail = Fcopy_sequence (tail); | |
2219 | tail_copied = 1; | |
5fb5aa33 RS |
2220 | call_overlay_mod_hooks (prop, overlay, start, end); |
2221 | } | |
173f2a64 | 2222 | } |
3bd13e92 KH |
2223 | /* Test for intersecting intervals. This does the right thing |
2224 | for both insertion and deletion. */ | |
2225 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2226 | { |
2227 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2228 | if (!NILP (prop)) |
2229 | { | |
55b48893 RS |
2230 | if (!tail_copied) |
2231 | tail = Fcopy_sequence (tail); | |
2232 | tail_copied = 1; | |
5fb5aa33 RS |
2233 | call_overlay_mod_hooks (prop, overlay, start, end); |
2234 | } | |
173f2a64 RS |
2235 | } |
2236 | } | |
2237 | ||
55b48893 | 2238 | tail_copied = 0; |
173f2a64 RS |
2239 | for (tail = current_buffer->overlays_after; |
2240 | CONSP (tail); | |
2241 | tail = XCONS (tail)->cdr) | |
2242 | { | |
2243 | int startpos, endpos; | |
be8b1c6b | 2244 | Lisp_Object ostart, oend; |
173f2a64 RS |
2245 | |
2246 | overlay = XCONS (tail)->car; | |
2247 | ||
2248 | ostart = OVERLAY_START (overlay); | |
2249 | oend = OVERLAY_END (overlay); | |
2250 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 2251 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
2252 | if (XFASTINT (end) < startpos) |
2253 | break; | |
2254 | if (XFASTINT (end) == startpos && insertion) | |
2255 | { | |
2256 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2257 | if (!NILP (prop)) |
2258 | { | |
55b48893 RS |
2259 | if (!tail_copied) |
2260 | tail = Fcopy_sequence (tail); | |
2261 | tail_copied = 1; | |
5fb5aa33 RS |
2262 | call_overlay_mod_hooks (prop, overlay, start, end); |
2263 | } | |
173f2a64 RS |
2264 | } |
2265 | if (XFASTINT (start) == endpos && insertion) | |
2266 | { | |
2267 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2268 | if (!NILP (prop)) |
2269 | { | |
55b48893 RS |
2270 | if (!tail_copied) |
2271 | tail = Fcopy_sequence (tail); | |
2272 | tail_copied = 1; | |
5fb5aa33 RS |
2273 | call_overlay_mod_hooks (prop, overlay, start, end); |
2274 | } | |
173f2a64 | 2275 | } |
3bd13e92 KH |
2276 | /* Test for intersecting intervals. This does the right thing |
2277 | for both insertion and deletion. */ | |
2278 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2279 | { |
2280 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2281 | if (!NILP (prop)) |
2282 | { | |
55b48893 RS |
2283 | if (!tail_copied) |
2284 | tail = Fcopy_sequence (tail); | |
2285 | tail_copied = 1; | |
5fb5aa33 RS |
2286 | call_overlay_mod_hooks (prop, overlay, start, end); |
2287 | } | |
173f2a64 RS |
2288 | } |
2289 | } | |
55b48893 RS |
2290 | |
2291 | UNGCPRO; | |
173f2a64 RS |
2292 | } |
2293 | ||
2294 | static void | |
2295 | call_overlay_mod_hooks (list, overlay, start, end) | |
2296 | Lisp_Object list, overlay, start, end; | |
2297 | { | |
2298 | struct gcpro gcpro1; | |
2299 | GCPRO1 (list); | |
2300 | while (!NILP (list)) | |
2301 | { | |
2302 | call3 (Fcar (list), overlay, start, end); | |
2303 | list = Fcdr (list); | |
2304 | } | |
2305 | UNGCPRO; | |
2306 | } | |
9d7608b7 KH |
2307 | |
2308 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
2309 | property is set. */ | |
2310 | void | |
2311 | evaporate_overlays (pos) | |
2312 | int pos; | |
2313 | { | |
2314 | Lisp_Object tail, overlay, hit_list; | |
2315 | ||
2316 | hit_list = Qnil; | |
2317 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
2318 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
2319 | tail = XCONS (tail)->cdr) | |
2320 | { | |
2321 | int endpos; | |
2322 | overlay = XCONS (tail)->car; | |
2323 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2324 | if (endpos < pos) | |
2325 | break; | |
2326 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
2327 | && Foverlay_get (overlay, Qevaporate)) | |
2328 | hit_list = Fcons (overlay, hit_list); | |
2329 | } | |
2330 | else | |
2331 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
2332 | tail = XCONS (tail)->cdr) | |
2333 | { | |
2334 | int startpos; | |
2335 | overlay = XCONS (tail)->cdr; | |
2336 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2337 | if (startpos > pos) | |
2338 | break; | |
2339 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
2340 | && Foverlay_get (overlay, Qevaporate)) | |
2341 | hit_list = Fcons (overlay, hit_list); | |
2342 | } | |
2343 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
2344 | Fdelete_overlay (XCONS (hit_list)->car); | |
2345 | } | |
173f2a64 | 2346 | \f |
0fa3ba92 JB |
2347 | /* Somebody has tried to store NEWVAL into the buffer-local slot with |
2348 | offset XUINT (valcontents), and NEWVAL has an unacceptable type. */ | |
2349 | void | |
2350 | buffer_slot_type_mismatch (valcontents, newval) | |
2351 | Lisp_Object valcontents, newval; | |
2352 | { | |
2353 | unsigned int offset = XUINT (valcontents); | |
5fcd022d | 2354 | unsigned char *symbol_name = |
0fa3ba92 JB |
2355 | (XSYMBOL (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
2356 | ->name->data); | |
2357 | char *type_name; | |
2358 | ||
2359 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) | |
2360 | { | |
2361 | case Lisp_Int: type_name = "integers"; break; | |
2362 | case Lisp_String: type_name = "strings"; break; | |
2363 | case Lisp_Marker: type_name = "markers"; break; | |
2364 | case Lisp_Symbol: type_name = "symbols"; break; | |
2365 | case Lisp_Cons: type_name = "lists"; break; | |
5fcd022d | 2366 | case Lisp_Vector: type_name = "vectors"; break; |
0fa3ba92 JB |
2367 | default: |
2368 | abort (); | |
2369 | } | |
2370 | ||
2371 | error ("only %s should be stored in the buffer-local variable %s", | |
2372 | type_name, symbol_name); | |
2373 | } | |
2374 | \f | |
1ab256cb RM |
2375 | init_buffer_once () |
2376 | { | |
2377 | register Lisp_Object tem; | |
2378 | ||
2379 | /* Make sure all markable slots in buffer_defaults | |
2380 | are initialized reasonably, so mark_buffer won't choke. */ | |
2381 | reset_buffer (&buffer_defaults); | |
bcd40520 | 2382 | reset_buffer_local_variables (&buffer_defaults); |
1ab256cb | 2383 | reset_buffer (&buffer_local_symbols); |
bcd40520 | 2384 | reset_buffer_local_variables (&buffer_local_symbols); |
1ab256cb RM |
2385 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); |
2386 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); | |
2387 | ||
2388 | /* Set up the default values of various buffer slots. */ | |
2389 | /* Must do these before making the first buffer! */ | |
2390 | ||
2391 | /* real setup is done in loaddefs.el */ | |
2392 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2393 | buffer_defaults.abbrev_mode = Qnil; | |
2394 | buffer_defaults.overwrite_mode = Qnil; | |
2395 | buffer_defaults.case_fold_search = Qt; | |
2396 | buffer_defaults.auto_fill_function = Qnil; | |
2397 | buffer_defaults.selective_display = Qnil; | |
2398 | #ifndef old | |
2399 | buffer_defaults.selective_display_ellipses = Qt; | |
2400 | #endif | |
2401 | buffer_defaults.abbrev_table = Qnil; | |
2402 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2403 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2404 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2405 | buffer_defaults.overlays_before = Qnil; |
2406 | buffer_defaults.overlays_after = Qnil; | |
2407 | XFASTINT (buffer_defaults.overlay_center) = 1; | |
1ab256cb RM |
2408 | |
2409 | XFASTINT (buffer_defaults.tab_width) = 8; | |
2410 | buffer_defaults.truncate_lines = Qnil; | |
2411 | buffer_defaults.ctl_arrow = Qt; | |
2412 | ||
54ad07d3 | 2413 | #ifdef MSDOS |
0776cb1b | 2414 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 2415 | #endif |
1ab256cb RM |
2416 | XFASTINT (buffer_defaults.fill_column) = 70; |
2417 | XFASTINT (buffer_defaults.left_margin) = 0; | |
2418 | ||
2419 | /* Assign the local-flags to the slots that have default values. | |
2420 | The local flag is a bit that is used in the buffer | |
2421 | to say that it has its own local value for the slot. | |
2422 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2423 | ||
2424 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 2425 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
2426 | |
2427 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2428 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
2429 | XFASTINT (buffer_local_flags.filename) = -1; | |
2430 | XFASTINT (buffer_local_flags.directory) = -1; | |
2431 | XFASTINT (buffer_local_flags.backed_up) = -1; | |
2432 | XFASTINT (buffer_local_flags.save_length) = -1; | |
2433 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; | |
2434 | XFASTINT (buffer_local_flags.read_only) = -1; | |
2435 | XFASTINT (buffer_local_flags.major_mode) = -1; | |
2436 | XFASTINT (buffer_local_flags.mode_name) = -1; | |
2437 | XFASTINT (buffer_local_flags.undo_list) = -1; | |
c48f61ef | 2438 | XFASTINT (buffer_local_flags.mark_active) = -1; |
1ab256cb RM |
2439 | |
2440 | XFASTINT (buffer_local_flags.mode_line_format) = 1; | |
2441 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; | |
2442 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; | |
2443 | XFASTINT (buffer_local_flags.case_fold_search) = 8; | |
2444 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; | |
2445 | XFASTINT (buffer_local_flags.selective_display) = 0x20; | |
2446 | #ifndef old | |
2447 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; | |
2448 | #endif | |
2449 | XFASTINT (buffer_local_flags.tab_width) = 0x80; | |
2450 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; | |
2451 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; | |
2452 | XFASTINT (buffer_local_flags.fill_column) = 0x400; | |
2453 | XFASTINT (buffer_local_flags.left_margin) = 0x800; | |
2454 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; | |
2455 | XFASTINT (buffer_local_flags.display_table) = 0x2000; | |
1ab256cb | 2456 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
54ad07d3 RS |
2457 | #ifdef MSDOS |
2458 | XFASTINT (buffer_local_flags.buffer_file_type) = 0x4000; | |
2459 | #endif | |
1ab256cb RM |
2460 | |
2461 | Vbuffer_alist = Qnil; | |
2462 | current_buffer = 0; | |
2463 | all_buffers = 0; | |
2464 | ||
2465 | QSFundamental = build_string ("Fundamental"); | |
2466 | ||
2467 | Qfundamental_mode = intern ("fundamental-mode"); | |
2468 | buffer_defaults.major_mode = Qfundamental_mode; | |
2469 | ||
2470 | Qmode_class = intern ("mode-class"); | |
2471 | ||
2472 | Qprotected_field = intern ("protected-field"); | |
2473 | ||
2474 | Qpermanent_local = intern ("permanent-local"); | |
2475 | ||
2476 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2477 | ||
2478 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2479 | /* super-magic invisible buffer */ | |
2480 | Vbuffer_alist = Qnil; | |
2481 | ||
ffd56f97 | 2482 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2483 | } |
2484 | ||
2485 | init_buffer () | |
2486 | { | |
2487 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2488 | char *pwd; |
2489 | struct stat dotstat, pwdstat; | |
136351b7 | 2490 | Lisp_Object temp; |
1ab256cb RM |
2491 | |
2492 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2493 | |
2494 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2495 | when PWD is right, and may avoid a fatal error. */ | |
2496 | if ((pwd = getenv ("PWD")) != 0 && *pwd == '/' | |
2497 | && stat (pwd, &pwdstat) == 0 | |
2498 | && stat (".", &dotstat) == 0 | |
2499 | && dotstat.st_ino == pwdstat.st_ino | |
2500 | && dotstat.st_dev == pwdstat.st_dev | |
2501 | && strlen (pwd) < MAXPATHLEN) | |
2502 | strcpy (buf, pwd); | |
2503 | else if (getwd (buf) == 0) | |
1ab256cb RM |
2504 | fatal ("`getwd' failed: %s.\n", buf); |
2505 | ||
2506 | #ifndef VMS | |
2507 | /* Maybe this should really use some standard subroutine | |
2508 | whose definition is filename syntax dependent. */ | |
2509 | if (buf[strlen (buf) - 1] != '/') | |
2510 | strcat (buf, "/"); | |
2511 | #endif /* not VMS */ | |
2512 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2513 | |
2514 | temp = get_minibuffer (0); | |
2515 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2516 | } |
2517 | ||
2518 | /* initialize the buffer routines */ | |
2519 | syms_of_buffer () | |
2520 | { | |
188d4d11 RM |
2521 | extern Lisp_Object Qdisabled; |
2522 | ||
1ab256cb RM |
2523 | staticpro (&Vbuffer_defaults); |
2524 | staticpro (&Vbuffer_local_symbols); | |
2525 | staticpro (&Qfundamental_mode); | |
2526 | staticpro (&Qmode_class); | |
2527 | staticpro (&QSFundamental); | |
2528 | staticpro (&Vbuffer_alist); | |
2529 | staticpro (&Qprotected_field); | |
2530 | staticpro (&Qpermanent_local); | |
2531 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2532 | staticpro (&Qoverlayp); |
9d7608b7 KH |
2533 | Qevaporate = intern ("evaporate"); |
2534 | staticpro (&Qevaporate); | |
294d215f RS |
2535 | staticpro (&Qmodification_hooks); |
2536 | Qmodification_hooks = intern ("modification-hooks"); | |
2537 | staticpro (&Qinsert_in_front_hooks); | |
2538 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2539 | staticpro (&Qinsert_behind_hooks); | |
2540 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2541 | staticpro (&Qget_file_buffer); |
2542 | Qget_file_buffer = intern ("get-file-buffer"); | |
5985d248 KH |
2543 | Qpriority = intern ("priority"); |
2544 | staticpro (&Qpriority); | |
2545 | Qwindow = intern ("window"); | |
2546 | staticpro (&Qwindow); | |
52f8ec73 JB |
2547 | |
2548 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2549 | |
2550 | Fput (Qprotected_field, Qerror_conditions, | |
2551 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2552 | Fput (Qprotected_field, Qerror_message, | |
2553 | build_string ("Attempt to modify a protected field")); | |
2554 | ||
2555 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
2556 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2557 | ||
2558 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2559 | &buffer_defaults.mode_line_format, | |
2560 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2561 | This is the same as (default-value 'mode-line-format)."); | |
2562 | ||
2563 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2564 | &buffer_defaults.abbrev_mode, | |
2565 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2566 | This is the same as (default-value 'abbrev-mode)."); | |
2567 | ||
2568 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2569 | &buffer_defaults.ctl_arrow, | |
2570 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2571 | This is the same as (default-value 'ctl-arrow)."); | |
2572 | ||
2573 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2574 | &buffer_defaults.truncate_lines, | |
2575 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2576 | This is the same as (default-value 'truncate-lines)."); | |
2577 | ||
2578 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2579 | &buffer_defaults.fill_column, | |
2580 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2581 | This is the same as (default-value 'fill-column)."); | |
2582 | ||
2583 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2584 | &buffer_defaults.left_margin, | |
2585 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2586 | This is the same as (default-value 'left-margin)."); | |
2587 | ||
2588 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
2589 | &buffer_defaults.tab_width, | |
2590 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
2591 | This is the same as (default-value 'tab-width)."); | |
2592 | ||
2593 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
2594 | &buffer_defaults.case_fold_search, | |
2595 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
2596 | This is the same as (default-value 'case-fold-search)."); | |
2597 | ||
54ad07d3 RS |
2598 | #ifdef MSDOS |
2599 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", | |
2600 | &buffer_defaults.buffer_file_type, | |
2601 | "Default file type for buffers that do not override it.\n\ | |
2602 | This is the same as (default-value 'buffer-file-type).\n\ | |
2603 | The file type is nil for text, t for binary."); | |
2604 | #endif | |
2605 | ||
0fa3ba92 JB |
2606 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
2607 | Qnil, 0); | |
1ab256cb RM |
2608 | |
2609 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
2610 | But make-docfile finds it! | |
2611 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 2612 | Qnil, |
1ab256cb RM |
2613 | "Template for displaying mode line for current buffer.\n\ |
2614 | Each buffer has its own value of this variable.\n\ | |
2615 | Value may be a string, a symbol or a list or cons cell.\n\ | |
2616 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
2617 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
2618 | in that the %-constructs below are not recognized.\n\ | |
2619 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
2620 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
2621 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
2622 | For a list whose car is a string or list, each element is processed\n\ | |
2623 | recursively and the results are effectively concatenated.\n\ | |
2624 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
2625 | and padded (if the number is positive) or truncated (if negative)\n\ | |
2626 | to the width specified by that number.\n\ | |
2627 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
2628 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
2629 | or when it is found in a cons-cell or a list)\n\ | |
2630 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
2631 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
2632 | % means buffer is read-only and * means it is modified.\n\ | |
2633 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 2634 | %s -- print process status. %l -- print the current line number.\n\ |
dd24e6a6 | 2635 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 2636 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 2637 | or print Bottom or All.\n\ |
1ab256cb | 2638 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 2639 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
2640 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
2641 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2642 | Decimal digits after the % specify field width to which to pad."); | |
2643 | */ | |
2644 | ||
2645 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2646 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2647 | nil here means use current buffer's major mode."); | |
2648 | ||
2649 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2650 | make_number (Lisp_Symbol), |
1ab256cb RM |
2651 | "Symbol for current buffer's major mode."); |
2652 | ||
2653 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2654 | make_number (Lisp_String), |
1ab256cb RM |
2655 | "Pretty name of current buffer's major mode (a string)."); |
2656 | ||
0fa3ba92 | 2657 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2658 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2659 | Automatically becomes buffer-local when set in any fashion."); | |
2660 | ||
2661 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2662 | Qnil, |
1ab256cb RM |
2663 | "*Non-nil if searches should ignore case.\n\ |
2664 | Automatically becomes buffer-local when set in any fashion."); | |
2665 | ||
2666 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2667 | make_number (Lisp_Int), |
1ab256cb RM |
2668 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2669 | Automatically becomes buffer-local when set in any fashion."); | |
2670 | ||
2671 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2672 | make_number (Lisp_Int), |
1ab256cb RM |
2673 | "*Column for the default indent-line-function to indent to.\n\ |
2674 | Linefeed indents to this column in Fundamental mode.\n\ | |
2675 | Automatically becomes buffer-local when set in any fashion."); | |
2676 | ||
2677 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2678 | make_number (Lisp_Int), |
1ab256cb RM |
2679 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2680 | Automatically becomes buffer-local when set in any fashion."); | |
2681 | ||
0fa3ba92 | 2682 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2683 | "*Non-nil means display control chars with uparrow.\n\ |
2684 | Nil means use backslash and octal digits.\n\ | |
2685 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2686 | This variable does not apply to characters whose display is specified\n\ | |
2687 | in the current display table (if there is one)."); | |
2688 | ||
0fa3ba92 | 2689 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2690 | "*Non-nil means do not display continuation lines;\n\ |
2691 | give each line of text one screen line.\n\ | |
2692 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2693 | \n\ | |
2694 | Note that this is overridden by the variable\n\ | |
2695 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2696 | and this buffer is not full-frame width."); |
1ab256cb | 2697 | |
54ad07d3 RS |
2698 | #ifdef MSDOS |
2699 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, | |
2700 | Qnil, | |
2701 | "*If visited file is text, nil; otherwise, t."); | |
2702 | #endif | |
2703 | ||
1ab256cb | 2704 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 2705 | make_number (Lisp_String), |
1ab256cb RM |
2706 | "Name of default directory of current buffer. Should end with slash.\n\ |
2707 | Each buffer has its own value of this variable."); | |
2708 | ||
2709 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 2710 | Qnil, |
1ab256cb RM |
2711 | "Function called (if non-nil) to perform auto-fill.\n\ |
2712 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
2713 | Each buffer has its own value of this variable.\n\ | |
2714 | NOTE: This variable is not an ordinary hook;\n\ | |
2715 | It may not be a list of functions."); | |
2716 | ||
2717 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 2718 | make_number (Lisp_String), |
1ab256cb RM |
2719 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
2720 | Each buffer has its own value of this variable."); | |
2721 | ||
2722 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 2723 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 2724 | make_number (Lisp_String), |
1ab256cb RM |
2725 | "Name of file for auto-saving current buffer,\n\ |
2726 | or nil if buffer should not be auto-saved.\n\ | |
2727 | Each buffer has its own value of this variable."); | |
2728 | ||
0fa3ba92 | 2729 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
2730 | "Non-nil if this buffer is read-only.\n\ |
2731 | Each buffer has its own value of this variable."); | |
2732 | ||
0fa3ba92 | 2733 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
2734 | "Non-nil if this buffer's file has been backed up.\n\ |
2735 | Backing up is done before the first time the file is saved.\n\ | |
2736 | Each buffer has its own value of this variable."); | |
2737 | ||
2738 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 2739 | make_number (Lisp_Int), |
1ab256cb RM |
2740 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
2741 | 0 initially.\n\ | |
2742 | Each buffer has its own value of this variable."); | |
2743 | ||
2744 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 2745 | Qnil, |
1ab256cb RM |
2746 | "Non-nil enables selective display:\n\ |
2747 | Integer N as value means display only lines\n\ | |
2748 | that start with less than n columns of space.\n\ | |
2749 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
2750 | Then ^M's in the file are written into files as newlines.\n\n\ | |
2751 | Automatically becomes buffer-local when set in any fashion."); | |
2752 | ||
2753 | #ifndef old | |
2754 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
2755 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 2756 | Qnil, |
1ab256cb RM |
2757 | "t means display ... on previous line when a line is invisible.\n\ |
2758 | Automatically becomes buffer-local when set in any fashion."); | |
2759 | #endif | |
2760 | ||
0fa3ba92 | 2761 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 2762 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
2763 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
2764 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 2765 | until the tab is filled in.\n\ |
6bbb0d4a | 2766 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
2767 | Automatically becomes buffer-local when set in any fashion."); |
2768 | ||
54939090 RS |
2769 | #if 0 /* The doc string is too long for some compilers, |
2770 | but make-docfile can find it in this comment. */ | |
1ab256cb | 2771 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 2772 | Qnil, |
1ab256cb RM |
2773 | "Display table that controls display of the contents of current buffer.\n\ |
2774 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2775 | The display table is a vector created with `make-display-table'.\n\ | |
2776 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 2777 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 2778 | nil means display the character in the default fashion.\n\ |
a45e35e1 | 2779 | The remaining six elements control the display of\n\ |
6158b3b0 JB |
2780 | the end of a truncated screen line (element 256, a single character);\n\ |
2781 | the end of a continued line (element 257, a single character);\n\ | |
2782 | the escape character used to display character codes in octal\n\ | |
2783 | (element 258, a single character);\n\ | |
2784 | the character used as an arrow for control characters (element 259,\n\ | |
2785 | a single character);\n\ | |
2786 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
a45e35e1 JB |
2787 | a vector of characters);\n\ |
2788 | the character used to draw the border between side-by-side windows\n\ | |
3402827c | 2789 | (element 261, a single character).\n\ |
1ab256cb RM |
2790 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
2791 | Each window can have its own, overriding display table."); | |
54939090 RS |
2792 | #endif |
2793 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 2794 | Qnil, 0); |
1ab256cb | 2795 | |
1ab256cb RM |
2796 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
2797 | "Don't ask."); | |
2798 | */ | |
01050cb5 | 2799 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
2800 | "Function to call before each text change.\n\ |
2801 | Two arguments are passed to the function: the positions of\n\ | |
2802 | the beginning and end of the range of old text to be changed.\n\ | |
2803 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2804 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 2805 | \n\ |
5f079267 | 2806 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
2807 | don't call any before-change or after-change functions.\n\ |
2808 | That's because these variables are temporarily set to nil.\n\ | |
2809 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2810 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2811 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
2812 | Vbefore_change_function = Qnil; |
2813 | ||
2814 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
2815 | "Function to call after each text change.\n\ | |
2816 | Three arguments are passed to the function: the positions of\n\ | |
2817 | the beginning and end of the range of changed text,\n\ | |
2818 | and the length of the pre-change text replaced by that range.\n\ | |
2819 | \(For an insertion, the pre-change length is zero;\n\ | |
2820 | for a deletion, that length is the number of characters deleted,\n\ | |
2821 | and the post-change beginning and end are at the same place.)\n\ | |
2822 | \n\ | |
5f079267 | 2823 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
2824 | don't call any before-change or after-change functions.\n\ |
2825 | That's because these variables are temporarily set to nil.\n\ | |
2826 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2827 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2828 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
2829 | Vafter_change_function = Qnil; |
2830 | ||
5f079267 RS |
2831 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
2832 | "List of functions to call before each text change.\n\ | |
2833 | Two arguments are passed to each function: the positions of\n\ | |
2834 | the beginning and end of the range of old text to be changed.\n\ | |
2835 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2836 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
2837 | \n\ |
2838 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
2839 | don't call any before-change or after-change functions.\n\ |
2840 | That's because these variables are temporarily set to nil.\n\ | |
2841 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2842 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2843 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
2844 | Vbefore_change_functions = Qnil; |
2845 | ||
2846 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
2847 | "List of function to call after each text change.\n\ | |
2848 | Three arguments are passed to each function: the positions of\n\ | |
2849 | the beginning and end of the range of changed text,\n\ | |
2850 | and the length of the pre-change text replaced by that range.\n\ | |
2851 | \(For an insertion, the pre-change length is zero;\n\ | |
2852 | for a deletion, that length is the number of characters deleted,\n\ | |
2853 | and the post-change beginning and end are at the same place.)\n\ | |
2854 | \n\ | |
2855 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
2856 | don't call any before-change or after-change functions.\n\ |
2857 | That's because these variables are temporarily set to nil.\n\ | |
2858 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2859 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2860 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 2861 | |
5f079267 RS |
2862 | Vafter_change_functions = Qnil; |
2863 | ||
dbc4e1c1 JB |
2864 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
2865 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
2866 | The functions are run using the `run-hooks' function."); | |
2867 | Vfirst_change_hook = Qnil; | |
2868 | Qfirst_change_hook = intern ("first-change-hook"); | |
2869 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 2870 | |
54939090 RS |
2871 | #if 0 /* The doc string is too long for some compilers, |
2872 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 2873 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
2874 | "List of undo entries in current buffer.\n\ |
2875 | Recent changes come first; older changes follow newer.\n\ | |
2876 | \n\ | |
2877 | An entry (START . END) represents an insertion which begins at\n\ | |
2878 | position START and ends at position END.\n\ | |
2879 | \n\ | |
2880 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
2881 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
2882 | of the text being deleted; if negative, point was at the end.\n\ | |
2883 | \n\ | |
2884 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
2885 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
2886 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
2887 | modification count of the most recent save is different, this entry is\n\ | |
2888 | obsolete.\n\ | |
2889 | \n\ | |
483c1fd3 RS |
2890 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
2891 | was modified between BEG and END. PROP is the property name,\n\ | |
2892 | and VAL is the old value.\n\ | |
2893 | \n\ | |
bec44fd6 JB |
2894 | An entry of the form POSITION indicates that point was at the buffer\n\ |
2895 | location given by the integer. Undoing an entry of this form places\n\ | |
2896 | point at POSITION.\n\ | |
2897 | \n\ | |
1ab256cb RM |
2898 | nil marks undo boundaries. The undo command treats the changes\n\ |
2899 | between two undo boundaries as a single step to be undone.\n\ | |
2900 | \n\ | |
bec44fd6 | 2901 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
2902 | #endif |
2903 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 2904 | 0); |
1ab256cb | 2905 | |
c48f61ef RS |
2906 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
2907 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
2908 | Automatically local in all buffers."); | |
2909 | ||
2910 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, | |
2911 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
2912 | Vtransient_mark_mode = Qnil; | |
2913 | ||
0a4469c9 | 2914 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
2915 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
2916 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
2917 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
2918 | and disregard a `read-only' text property if the property value\n\ | |
2919 | is a member of the list."); | |
2920 | Vinhibit_read_only = Qnil; | |
2921 | ||
dcdffbf6 RS |
2922 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
2923 | "List of functions called with no args to query before killing a buffer."); | |
2924 | Vkill_buffer_query_functions = Qnil; | |
2925 | ||
1ab256cb RM |
2926 | defsubr (&Sbuffer_list); |
2927 | defsubr (&Sget_buffer); | |
2928 | defsubr (&Sget_file_buffer); | |
2929 | defsubr (&Sget_buffer_create); | |
01050cb5 | 2930 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
2931 | defsubr (&Sbuffer_name); |
2932 | /*defsubr (&Sbuffer_number);*/ | |
2933 | defsubr (&Sbuffer_file_name); | |
2934 | defsubr (&Sbuffer_local_variables); | |
2935 | defsubr (&Sbuffer_modified_p); | |
2936 | defsubr (&Sset_buffer_modified_p); | |
2937 | defsubr (&Sbuffer_modified_tick); | |
2938 | defsubr (&Srename_buffer); | |
2939 | defsubr (&Sother_buffer); | |
2940 | defsubr (&Sbuffer_disable_undo); | |
2941 | defsubr (&Sbuffer_enable_undo); | |
2942 | defsubr (&Skill_buffer); | |
2943 | defsubr (&Serase_buffer); | |
2944 | defsubr (&Sswitch_to_buffer); | |
2945 | defsubr (&Spop_to_buffer); | |
2946 | defsubr (&Scurrent_buffer); | |
2947 | defsubr (&Sset_buffer); | |
2948 | defsubr (&Sbarf_if_buffer_read_only); | |
2949 | defsubr (&Sbury_buffer); | |
2950 | defsubr (&Slist_buffers); | |
2951 | defsubr (&Skill_all_local_variables); | |
2eec3b4e | 2952 | |
52f8ec73 | 2953 | defsubr (&Soverlayp); |
2eec3b4e RS |
2954 | defsubr (&Smake_overlay); |
2955 | defsubr (&Sdelete_overlay); | |
2956 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
2957 | defsubr (&Soverlay_start); |
2958 | defsubr (&Soverlay_end); | |
2959 | defsubr (&Soverlay_buffer); | |
2960 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
2961 | defsubr (&Soverlays_at); |
2962 | defsubr (&Snext_overlay_change); | |
2963 | defsubr (&Soverlay_recenter); | |
2964 | defsubr (&Soverlay_lists); | |
2965 | defsubr (&Soverlay_get); | |
2966 | defsubr (&Soverlay_put); | |
1ab256cb RM |
2967 | } |
2968 | ||
2969 | keys_of_buffer () | |
2970 | { | |
2971 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
2972 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
2973 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
4158c17d RM |
2974 | |
2975 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
2976 | initialized when that function gets called. */ | |
2977 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 2978 | } |