Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
c6c5df7f | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993 |
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; | |
112 | ||
c48f61ef RS |
113 | Lisp_Object Vtransient_mark_mode; |
114 | ||
a96b68f1 RS |
115 | /* t means ignore all read-only text properties. |
116 | A list means ignore such a property if its value is a member of the list. | |
117 | Any non-nil value means ignore buffer-read-only. */ | |
118 | Lisp_Object Vinhibit_read_only; | |
119 | ||
dbc4e1c1 JB |
120 | /* List of functions to call before changing an unmodified buffer. */ |
121 | Lisp_Object Vfirst_change_hook; | |
122 | Lisp_Object Qfirst_change_hook; | |
1ab256cb RM |
123 | |
124 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
125 | ||
126 | Lisp_Object Qprotected_field; | |
127 | ||
128 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
129 | ||
130 | Lisp_Object Qkill_buffer_hook; | |
131 | ||
5fe0b67e RS |
132 | Lisp_Object Qget_file_buffer; |
133 | ||
52f8ec73 JB |
134 | Lisp_Object Qoverlayp; |
135 | ||
294d215f RS |
136 | Lisp_Object Qmodification_hooks; |
137 | Lisp_Object Qinsert_in_front_hooks; | |
138 | Lisp_Object Qinsert_behind_hooks; | |
139 | ||
1ab256cb RM |
140 | /* For debugging; temporary. See set_buffer_internal. */ |
141 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
142 | ||
143 | nsberror (spec) | |
144 | Lisp_Object spec; | |
145 | { | |
146 | if (XTYPE (spec) == Lisp_String) | |
147 | error ("No buffer named %s", XSTRING (spec)->data); | |
148 | error ("Invalid buffer argument"); | |
149 | } | |
150 | \f | |
151 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
152 | "Return a list of all existing live buffers.") | |
153 | () | |
154 | { | |
155 | return Fmapcar (Qcdr, Vbuffer_alist); | |
156 | } | |
157 | ||
158 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, | |
159 | "Return the buffer named NAME (a string).\n\ | |
160 | If there is no live buffer named NAME, return nil.\n\ | |
161 | NAME may also be a buffer; if so, the value is that buffer.") | |
162 | (name) | |
163 | register Lisp_Object name; | |
164 | { | |
165 | if (XTYPE (name) == Lisp_Buffer) | |
166 | return name; | |
167 | CHECK_STRING (name, 0); | |
168 | ||
169 | return Fcdr (Fassoc (name, Vbuffer_alist)); | |
170 | } | |
171 | ||
172 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
173 | "Return the buffer visiting file FILENAME (a string).\n\ | |
174 | If there is no such live buffer, return nil.") | |
175 | (filename) | |
176 | register Lisp_Object filename; | |
177 | { | |
178 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
179 | Lisp_Object handler; |
180 | ||
1ab256cb RM |
181 | CHECK_STRING (filename, 0); |
182 | filename = Fexpand_file_name (filename, Qnil); | |
183 | ||
5fe0b67e RS |
184 | /* If the file name has special constructs in it, |
185 | call the corresponding file handler. */ | |
186 | handler = Ffind_file_name_handler (filename); | |
187 | if (!NILP (handler)) | |
188 | return call2 (handler, Qget_file_buffer, filename); | |
189 | ||
1ab256cb RM |
190 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
191 | { | |
192 | buf = Fcdr (XCONS (tail)->car); | |
193 | if (XTYPE (buf) != Lisp_Buffer) continue; | |
194 | if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue; | |
195 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); | |
265a9e55 | 196 | if (!NILP (tem)) |
1ab256cb RM |
197 | return buf; |
198 | } | |
199 | return Qnil; | |
200 | } | |
201 | ||
202 | /* Incremented for each buffer created, to assign the buffer number. */ | |
203 | int buffer_count; | |
204 | ||
205 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
206 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
207 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 208 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
209 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
210 | The value is never nil.") | |
211 | (name) | |
212 | register Lisp_Object name; | |
213 | { | |
214 | register Lisp_Object buf, function, tem; | |
215 | int count = specpdl_ptr - specpdl; | |
216 | register struct buffer *b; | |
217 | ||
218 | buf = Fget_buffer (name); | |
265a9e55 | 219 | if (!NILP (buf)) |
1ab256cb RM |
220 | return buf; |
221 | ||
9ac0d9e0 | 222 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb RM |
223 | |
224 | BUF_GAP_SIZE (b) = 20; | |
9ac0d9e0 | 225 | BLOCK_INPUT; |
1ab256cb | 226 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 227 | UNBLOCK_INPUT; |
1ab256cb RM |
228 | if (! BUF_BEG_ADDR (b)) |
229 | memory_full (); | |
230 | ||
231 | BUF_PT (b) = 1; | |
232 | BUF_GPT (b) = 1; | |
233 | BUF_BEGV (b) = 1; | |
234 | BUF_ZV (b) = 1; | |
235 | BUF_Z (b) = 1; | |
236 | BUF_MODIFF (b) = 1; | |
237 | ||
238 | /* Put this on the chain of all buffers including killed ones. */ | |
239 | b->next = all_buffers; | |
240 | all_buffers = b; | |
241 | ||
242 | b->mark = Fmake_marker (); | |
243 | /*b->number = make_number (++buffer_count);*/ | |
244 | b->name = name; | |
245 | if (XSTRING (name)->data[0] != ' ') | |
246 | b->undo_list = Qnil; | |
247 | else | |
248 | b->undo_list = Qt; | |
249 | ||
250 | reset_buffer (b); | |
251 | ||
252 | /* Put this in the alist of all live buffers. */ | |
253 | XSET (buf, Lisp_Buffer, b); | |
254 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
255 | ||
256 | b->mark = Fmake_marker (); | |
257 | b->markers = Qnil; | |
258 | b->name = name; | |
259 | ||
260 | function = buffer_defaults.major_mode; | |
265a9e55 | 261 | if (NILP (function)) |
1ab256cb RM |
262 | { |
263 | tem = Fget (current_buffer->major_mode, Qmode_class); | |
264 | if (EQ (tem, Qnil)) | |
265 | function = current_buffer->major_mode; | |
266 | } | |
267 | ||
265a9e55 | 268 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1ab256cb RM |
269 | return buf; |
270 | ||
271 | /* To select a nonfundamental mode, | |
272 | select the buffer temporarily and then call the mode function. */ | |
273 | ||
274 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
275 | ||
276 | Fset_buffer (buf); | |
277 | call0 (function); | |
278 | ||
279 | return unbind_to (count, buf); | |
280 | } | |
281 | ||
282 | /* Reinitialize everything about a buffer except its name and contents. */ | |
283 | ||
284 | void | |
285 | reset_buffer (b) | |
286 | register struct buffer *b; | |
287 | { | |
288 | b->filename = Qnil; | |
289 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; | |
290 | b->modtime = 0; | |
291 | b->save_modified = 1; | |
291026b5 | 292 | XFASTINT (b->save_length) = 0; |
1ab256cb RM |
293 | b->last_window_start = 1; |
294 | b->backed_up = Qnil; | |
295 | b->auto_save_modified = 0; | |
296 | b->auto_save_file_name = Qnil; | |
297 | b->read_only = Qnil; | |
2eec3b4e RS |
298 | b->overlays_before = Qnil; |
299 | b->overlays_after = Qnil; | |
300 | XFASTINT (b->overlay_center) = 1; | |
dfda7a7f | 301 | b->mark_active = Qnil; |
33f7013e JA |
302 | |
303 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
304 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
305 | ||
1ab256cb RM |
306 | reset_buffer_local_variables(b); |
307 | } | |
308 | ||
c48f61ef | 309 | reset_buffer_local_variables (b) |
1ab256cb RM |
310 | register struct buffer *b; |
311 | { | |
312 | register int offset; | |
313 | ||
314 | /* Reset the major mode to Fundamental, together with all the | |
315 | things that depend on the major mode. | |
316 | default-major-mode is handled at a higher level. | |
317 | We ignore it here. */ | |
318 | b->major_mode = Qfundamental_mode; | |
319 | b->keymap = Qnil; | |
320 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
321 | b->mode_name = QSFundamental; | |
322 | b->minor_modes = Qnil; | |
323 | b->downcase_table = Vascii_downcase_table; | |
324 | b->upcase_table = Vascii_upcase_table; | |
325 | b->case_canon_table = Vascii_downcase_table; | |
326 | b->case_eqv_table = Vascii_upcase_table; | |
327 | #if 0 | |
328 | b->sort_table = XSTRING (Vascii_sort_table); | |
329 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
330 | #endif /* 0 */ | |
331 | ||
332 | /* Reset all per-buffer variables to their defaults. */ | |
333 | b->local_var_alist = Qnil; | |
334 | b->local_var_flags = 0; | |
335 | ||
336 | /* For each slot that has a default value, | |
337 | copy that into the slot. */ | |
338 | ||
339 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
340 | offset < sizeof (struct buffer); | |
341 | offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */ | |
342 | if (*(int *)(offset + (char *) &buffer_local_flags) > 0 | |
343 | || *(int *)(offset + (char *) &buffer_local_flags) == -2) | |
344 | *(Lisp_Object *)(offset + (char *)b) = | |
345 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
346 | } | |
347 | ||
01050cb5 RM |
348 | /* We split this away from generate-new-buffer, because rename-buffer |
349 | and set-visited-file-name ought to be able to use this to really | |
350 | rename the buffer properly. */ | |
351 | ||
352 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 353 | 1, 2, 0, |
01050cb5 RM |
354 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
355 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 356 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 357 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 358 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 359 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 360 | even if a buffer with that name exists.") |
c273e647 RS |
361 | (name, ignore) |
362 | register Lisp_Object name, ignore; | |
1ab256cb RM |
363 | { |
364 | register Lisp_Object gentemp, tem; | |
365 | int count; | |
366 | char number[10]; | |
367 | ||
368 | CHECK_STRING (name, 0); | |
369 | ||
370 | tem = Fget_buffer (name); | |
265a9e55 | 371 | if (NILP (tem)) |
01050cb5 | 372 | return name; |
1ab256cb RM |
373 | |
374 | count = 1; | |
375 | while (1) | |
376 | { | |
377 | sprintf (number, "<%d>", ++count); | |
378 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 379 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
380 | if (!NILP (tem)) |
381 | return gentemp; | |
1ab256cb | 382 | tem = Fget_buffer (gentemp); |
265a9e55 | 383 | if (NILP (tem)) |
01050cb5 | 384 | return gentemp; |
1ab256cb RM |
385 | } |
386 | } | |
387 | ||
388 | \f | |
389 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
390 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 391 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
392 | (buffer) |
393 | register Lisp_Object buffer; | |
394 | { | |
265a9e55 | 395 | if (NILP (buffer)) |
1ab256cb RM |
396 | return current_buffer->name; |
397 | CHECK_BUFFER (buffer, 0); | |
398 | return XBUFFER (buffer)->name; | |
399 | } | |
400 | ||
401 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
402 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
403 | No argument or nil as argument means use the current buffer.") | |
404 | (buffer) | |
405 | register Lisp_Object buffer; | |
406 | { | |
265a9e55 | 407 | if (NILP (buffer)) |
1ab256cb RM |
408 | return current_buffer->filename; |
409 | CHECK_BUFFER (buffer, 0); | |
410 | return XBUFFER (buffer)->filename; | |
411 | } | |
412 | ||
413 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, | |
414 | Sbuffer_local_variables, 0, 1, 0, | |
415 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
416 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
417 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
418 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
419 | No argument or nil as argument means use current buffer as BUFFER.") | |
420 | (buffer) | |
421 | register Lisp_Object buffer; | |
422 | { | |
423 | register struct buffer *buf; | |
553defa4 | 424 | register Lisp_Object result; |
1ab256cb | 425 | |
265a9e55 | 426 | if (NILP (buffer)) |
1ab256cb RM |
427 | buf = current_buffer; |
428 | else | |
429 | { | |
430 | CHECK_BUFFER (buffer, 0); | |
431 | buf = XBUFFER (buffer); | |
432 | } | |
433 | ||
553defa4 RS |
434 | result = Qnil; |
435 | ||
1ab256cb RM |
436 | { |
437 | /* Reference each variable in the alist in our current buffer. | |
438 | If inquiring about the current buffer, this gets the current values, | |
439 | so store them into the alist so the alist is up to date. | |
440 | If inquiring about some other buffer, this swaps out any values | |
441 | for that buffer, making the alist up to date automatically. */ | |
553defa4 RS |
442 | register Lisp_Object tail; |
443 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 444 | { |
553defa4 RS |
445 | Lisp_Object val, elt; |
446 | ||
447 | elt = XCONS (tail)->car; | |
448 | ||
1ab256cb | 449 | if (buf == current_buffer) |
553defa4 RS |
450 | val = find_symbol_value (XCONS (elt)->car); |
451 | else | |
452 | val = XCONS (elt)->cdr; | |
453 | ||
454 | /* If symbol is unbound, put just the symbol in the list. */ | |
455 | if (EQ (val, Qunbound)) | |
456 | result = Fcons (XCONS (elt)->car, result); | |
457 | /* Otherwise, put (symbol . value) in the list. */ | |
458 | else | |
459 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
460 | } |
461 | } | |
462 | ||
1ab256cb RM |
463 | /* Add on all the variables stored in special slots. */ |
464 | { | |
465 | register int offset, mask; | |
466 | ||
467 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
468 | offset < sizeof (struct buffer); | |
469 | offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */ | |
470 | { | |
471 | mask = *(int *)(offset + (char *) &buffer_local_flags); | |
472 | if (mask == -1 || (buf->local_var_flags & mask)) | |
473 | if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) | |
474 | == Lisp_Symbol) | |
553defa4 RS |
475 | result = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols), |
476 | *(Lisp_Object *)(offset + (char *)buf)), | |
477 | result); | |
1ab256cb RM |
478 | } |
479 | } | |
553defa4 RS |
480 | |
481 | return result; | |
1ab256cb RM |
482 | } |
483 | ||
484 | \f | |
485 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
486 | 0, 1, 0, | |
487 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
488 | No argument or nil as argument means use current buffer as BUFFER.") | |
489 | (buffer) | |
490 | register Lisp_Object buffer; | |
491 | { | |
492 | register struct buffer *buf; | |
265a9e55 | 493 | if (NILP (buffer)) |
1ab256cb RM |
494 | buf = current_buffer; |
495 | else | |
496 | { | |
497 | CHECK_BUFFER (buffer, 0); | |
498 | buf = XBUFFER (buffer); | |
499 | } | |
500 | ||
501 | return buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil; | |
502 | } | |
503 | ||
504 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
505 | 1, 1, 0, | |
506 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
507 | A non-nil FLAG means mark the buffer modified.") | |
508 | (flag) | |
509 | register Lisp_Object flag; | |
510 | { | |
511 | register int already; | |
512 | register Lisp_Object fn; | |
513 | ||
514 | #ifdef CLASH_DETECTION | |
515 | /* If buffer becoming modified, lock the file. | |
516 | If buffer becoming unmodified, unlock the file. */ | |
517 | ||
518 | fn = current_buffer->filename; | |
265a9e55 | 519 | if (!NILP (fn)) |
1ab256cb RM |
520 | { |
521 | already = current_buffer->save_modified < MODIFF; | |
265a9e55 | 522 | if (!already && !NILP (flag)) |
1ab256cb | 523 | lock_file (fn); |
265a9e55 | 524 | else if (already && NILP (flag)) |
1ab256cb RM |
525 | unlock_file (fn); |
526 | } | |
527 | #endif /* CLASH_DETECTION */ | |
528 | ||
265a9e55 | 529 | current_buffer->save_modified = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
530 | update_mode_lines++; |
531 | return flag; | |
532 | } | |
533 | ||
534 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
535 | 0, 1, 0, | |
536 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
537 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
538 | that buffer is changed. It wraps around occasionally.\n\ | |
539 | No argument or nil as argument means use current buffer as BUFFER.") | |
540 | (buffer) | |
541 | register Lisp_Object buffer; | |
542 | { | |
543 | register struct buffer *buf; | |
265a9e55 | 544 | if (NILP (buffer)) |
1ab256cb RM |
545 | buf = current_buffer; |
546 | else | |
547 | { | |
548 | CHECK_BUFFER (buffer, 0); | |
549 | buf = XBUFFER (buffer); | |
550 | } | |
551 | ||
552 | return make_number (BUF_MODIFF (buf)); | |
553 | } | |
554 | \f | |
01050cb5 | 555 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 556 | "sRename buffer (to new name): \nP", |
1ab256cb | 557 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 558 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 559 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 560 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 561 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
562 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
563 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 564 | This does not change the name of the visited file (if any).") |
3bd779aa RS |
565 | (name, unique) |
566 | register Lisp_Object name, unique; | |
1ab256cb RM |
567 | { |
568 | register Lisp_Object tem, buf; | |
569 | ||
570 | CHECK_STRING (name, 0); | |
571 | tem = Fget_buffer (name); | |
c059b5ea RM |
572 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
573 | the buffer automatically so you can create another with the original name. | |
574 | It makes UNIQUE equivalent to | |
575 | (rename-buffer (generate-new-buffer-name NAME)). */ | |
576 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
01050cb5 | 577 | return current_buffer->name; |
265a9e55 | 578 | if (!NILP (tem)) |
01050cb5 | 579 | { |
3bd779aa | 580 | if (!NILP (unique)) |
c273e647 | 581 | name = Fgenerate_new_buffer_name (name, current_buffer->name); |
01050cb5 RM |
582 | else |
583 | error ("Buffer name \"%s\" is in use", XSTRING (name)->data); | |
584 | } | |
1ab256cb RM |
585 | |
586 | current_buffer->name = name; | |
76f590d7 JB |
587 | |
588 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
589 | any windows displaying current_buffer will stay unchanged. */ | |
590 | update_mode_lines++; | |
591 | ||
1ab256cb RM |
592 | XSET (buf, Lisp_Buffer, current_buffer); |
593 | Fsetcar (Frassq (buf, Vbuffer_alist), name); | |
265a9e55 | 594 | if (NILP (current_buffer->filename) && !NILP (current_buffer->auto_save_file_name)) |
1ab256cb | 595 | call0 (intern ("rename-auto-save-file")); |
01050cb5 | 596 | return name; |
1ab256cb RM |
597 | } |
598 | ||
a0ebb746 | 599 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 600 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
601 | Buffers not visible in windows are preferred to visible buffers,\n\ |
602 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
603 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
604 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
605 | (buffer, visible_ok) |
606 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
607 | { |
608 | register Lisp_Object tail, buf, notsogood, tem; | |
609 | notsogood = Qnil; | |
610 | ||
265a9e55 | 611 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
612 | { |
613 | buf = Fcdr (Fcar (tail)); | |
614 | if (EQ (buf, buffer)) | |
615 | continue; | |
616 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
617 | continue; | |
a0ebb746 | 618 | if (NILP (visible_ok)) |
db732e5a | 619 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
620 | else |
621 | tem = Qnil; | |
265a9e55 | 622 | if (NILP (tem)) |
1ab256cb | 623 | return buf; |
265a9e55 | 624 | if (NILP (notsogood)) |
1ab256cb RM |
625 | notsogood = buf; |
626 | } | |
265a9e55 | 627 | if (!NILP (notsogood)) |
1ab256cb RM |
628 | return notsogood; |
629 | return Fget_buffer_create (build_string ("*scratch*")); | |
630 | } | |
631 | \f | |
5b8bcf48 | 632 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1, |
1ab256cb | 633 | 0, |
5b8bcf48 RS |
634 | "Make BUFFER stop keeping undo information.\n\ |
635 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
636 | (buffer) |
637 | register Lisp_Object buffer; | |
1ab256cb | 638 | { |
ffd56f97 JB |
639 | Lisp_Object real_buffer; |
640 | ||
641 | if (NILP (buffer)) | |
642 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
643 | else | |
644 | { | |
645 | real_buffer = Fget_buffer (buffer); | |
646 | if (NILP (real_buffer)) | |
647 | nsberror (buffer); | |
648 | } | |
649 | ||
650 | XBUFFER (real_buffer)->undo_list = Qt; | |
651 | ||
1ab256cb RM |
652 | return Qnil; |
653 | } | |
654 | ||
655 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
656 | 0, 1, "", | |
657 | "Start keeping undo information for buffer BUFFER.\n\ | |
658 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
659 | (buffer) |
660 | register Lisp_Object buffer; | |
1ab256cb | 661 | { |
ffd56f97 | 662 | Lisp_Object real_buffer; |
1ab256cb | 663 | |
ffd56f97 JB |
664 | if (NILP (buffer)) |
665 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
1ab256cb RM |
666 | else |
667 | { | |
ffd56f97 JB |
668 | real_buffer = Fget_buffer (buffer); |
669 | if (NILP (real_buffer)) | |
670 | nsberror (buffer); | |
1ab256cb RM |
671 | } |
672 | ||
ffd56f97 JB |
673 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
674 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
675 | |
676 | return Qnil; | |
677 | } | |
678 | ||
679 | /* | |
680 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
681 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
682 | The buffer being killed will be current while the hook is running.\n\ | |
683 | See `kill-buffer'." | |
684 | */ | |
685 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
686 | "Kill the buffer BUFFER.\n\ | |
687 | The argument may be a buffer or may be the name of a buffer.\n\ | |
688 | An argument of nil means kill the current buffer.\n\n\ | |
689 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
690 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
691 | if not void, is a list of functions to be called, with no arguments,\n\ | |
692 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
693 | when the hook functions are called.\n\n\ | |
694 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
695 | with `delete-process'.") | |
696 | (bufname) | |
697 | Lisp_Object bufname; | |
698 | { | |
699 | Lisp_Object buf; | |
700 | register struct buffer *b; | |
701 | register Lisp_Object tem; | |
702 | register struct Lisp_Marker *m; | |
703 | struct gcpro gcpro1, gcpro2; | |
704 | ||
265a9e55 | 705 | if (NILP (bufname)) |
1ab256cb RM |
706 | buf = Fcurrent_buffer (); |
707 | else | |
708 | buf = Fget_buffer (bufname); | |
265a9e55 | 709 | if (NILP (buf)) |
1ab256cb RM |
710 | nsberror (bufname); |
711 | ||
712 | b = XBUFFER (buf); | |
713 | ||
714 | /* Query if the buffer is still modified. */ | |
265a9e55 | 715 | if (INTERACTIVE && !NILP (b->filename) |
1ab256cb RM |
716 | && BUF_MODIFF (b) > b->save_modified) |
717 | { | |
718 | GCPRO2 (buf, bufname); | |
719 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
720 | XSTRING (b->name)->data)); | |
721 | UNGCPRO; | |
265a9e55 | 722 | if (NILP (tem)) |
1ab256cb RM |
723 | return Qnil; |
724 | } | |
725 | ||
726 | /* Run kill-buffer hook with the buffer to be killed the current buffer. */ | |
727 | { | |
728 | register Lisp_Object val; | |
729 | int count = specpdl_ptr - specpdl; | |
730 | ||
731 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
732 | set_buffer_internal (b); | |
733 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
734 | unbind_to (count, Qnil); | |
735 | } | |
736 | ||
737 | /* We have no more questions to ask. Verify that it is valid | |
738 | to kill the buffer. This must be done after the questions | |
739 | since anything can happen within do_yes_or_no_p. */ | |
740 | ||
741 | /* Don't kill the minibuffer now current. */ | |
742 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
743 | return Qnil; | |
744 | ||
265a9e55 | 745 | if (NILP (b->name)) |
1ab256cb RM |
746 | return Qnil; |
747 | ||
748 | /* Make this buffer not be current. | |
749 | In the process, notice if this is the sole visible buffer | |
750 | and give up if so. */ | |
751 | if (b == current_buffer) | |
752 | { | |
172a9c1f | 753 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
754 | Fset_buffer (tem); |
755 | if (b == current_buffer) | |
756 | return Qnil; | |
757 | } | |
758 | ||
759 | /* Now there is no question: we can kill the buffer. */ | |
760 | ||
761 | #ifdef CLASH_DETECTION | |
762 | /* Unlock this buffer's file, if it is locked. */ | |
763 | unlock_buffer (b); | |
764 | #endif /* CLASH_DETECTION */ | |
765 | ||
1ab256cb | 766 | kill_buffer_processes (buf); |
1ab256cb RM |
767 | |
768 | tem = Vinhibit_quit; | |
769 | Vinhibit_quit = Qt; | |
770 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
771 | Freplace_buffer_in_windows (buf); | |
772 | Vinhibit_quit = tem; | |
773 | ||
774 | /* Delete any auto-save file. */ | |
775 | if (XTYPE (b->auto_save_file_name) == Lisp_String) | |
776 | { | |
777 | Lisp_Object tem; | |
778 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 779 | if (! NILP (tem)) |
1ab256cb RM |
780 | unlink (XSTRING (b->auto_save_file_name)->data); |
781 | } | |
782 | ||
783 | /* Unchain all markers of this buffer | |
784 | and leave them pointing nowhere. */ | |
785 | for (tem = b->markers; !EQ (tem, Qnil); ) | |
786 | { | |
787 | m = XMARKER (tem); | |
788 | m->buffer = 0; | |
789 | tem = m->chain; | |
790 | m->chain = Qnil; | |
791 | } | |
792 | b->markers = Qnil; | |
793 | ||
33f7013e JA |
794 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
795 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
796 | /* Perhaps we should explicitly free the interval tree here... */ | |
797 | ||
1ab256cb | 798 | b->name = Qnil; |
9ac0d9e0 | 799 | BLOCK_INPUT; |
1ab256cb | 800 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
9ac0d9e0 | 801 | UNBLOCK_INPUT; |
1ab256cb RM |
802 | b->undo_list = Qnil; |
803 | ||
804 | return Qt; | |
805 | } | |
806 | \f | |
36a8c287 JB |
807 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
808 | we do this each time BUF is selected visibly, the more recently | |
809 | selected buffers are always closer to the front of the list. This | |
810 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
811 | |
812 | record_buffer (buf) | |
813 | Lisp_Object buf; | |
814 | { | |
815 | register Lisp_Object link, prev; | |
816 | ||
817 | prev = Qnil; | |
818 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
819 | { | |
820 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
821 | break; | |
822 | prev = link; | |
823 | } | |
824 | ||
36a8c287 JB |
825 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
826 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 827 | |
265a9e55 | 828 | if (NILP (prev)) |
1ab256cb RM |
829 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
830 | else | |
831 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
832 | ||
833 | XCONS(link)->cdr = Vbuffer_alist; | |
834 | Vbuffer_alist = link; | |
835 | } | |
836 | ||
837 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", | |
838 | "Select buffer BUFFER in the current window.\n\ | |
839 | BUFFER may be a buffer or a buffer name.\n\ | |
840 | Optional second arg NORECORD non-nil means\n\ | |
841 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
842 | \n\ | |
843 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
844 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
845 | the window-buffer correspondences.") | |
846 | (bufname, norecord) | |
847 | Lisp_Object bufname, norecord; | |
848 | { | |
849 | register Lisp_Object buf; | |
850 | Lisp_Object tem; | |
851 | ||
852 | if (EQ (minibuf_window, selected_window)) | |
853 | error ("Cannot switch buffers in minibuffer window"); | |
854 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 855 | if (!NILP (tem)) |
1ab256cb RM |
856 | error ("Cannot switch buffers in a dedicated window"); |
857 | ||
265a9e55 | 858 | if (NILP (bufname)) |
172a9c1f | 859 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
860 | else |
861 | buf = Fget_buffer_create (bufname); | |
862 | Fset_buffer (buf); | |
265a9e55 | 863 | if (NILP (norecord)) |
1ab256cb RM |
864 | record_buffer (buf); |
865 | ||
866 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
867 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
868 | : selected_window, | |
1ab256cb RM |
869 | buf); |
870 | ||
e8b3a22d | 871 | return buf; |
1ab256cb RM |
872 | } |
873 | ||
874 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
875 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
876 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
877 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
878 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
879 | window even if BUFFER is already visible in the selected window.") | |
880 | (bufname, other) | |
881 | Lisp_Object bufname, other; | |
882 | { | |
883 | register Lisp_Object buf; | |
265a9e55 | 884 | if (NILP (bufname)) |
172a9c1f | 885 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
886 | else |
887 | buf = Fget_buffer_create (bufname); | |
888 | Fset_buffer (buf); | |
889 | record_buffer (buf); | |
890 | Fselect_window (Fdisplay_buffer (buf, other)); | |
e8b3a22d | 891 | return buf; |
1ab256cb RM |
892 | } |
893 | ||
894 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
895 | "Return the current buffer as a Lisp object.") | |
896 | () | |
897 | { | |
898 | register Lisp_Object buf; | |
899 | XSET (buf, Lisp_Buffer, current_buffer); | |
900 | return buf; | |
901 | } | |
902 | \f | |
903 | /* Set the current buffer to b */ | |
904 | ||
905 | void | |
906 | set_buffer_internal (b) | |
907 | register struct buffer *b; | |
908 | { | |
909 | register struct buffer *old_buf; | |
910 | register Lisp_Object tail, valcontents; | |
911 | enum Lisp_Type tem; | |
912 | ||
913 | if (current_buffer == b) | |
914 | return; | |
915 | ||
916 | windows_or_buffers_changed = 1; | |
917 | old_buf = current_buffer; | |
918 | current_buffer = b; | |
919 | last_known_column_point = -1; /* invalidate indentation cache */ | |
920 | ||
921 | /* Look down buffer's list of local Lisp variables | |
922 | to find and update any that forward into C variables. */ | |
923 | ||
265a9e55 | 924 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
925 | { |
926 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
927 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
928 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
929 | && (tem = XTYPE (XCONS (valcontents)->car), | |
930 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
931 | || tem == Lisp_Objfwd))) | |
932 | /* Just reference the variable | |
933 | to cause it to become set for this buffer. */ | |
934 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
935 | } | |
936 | ||
937 | /* Do the same with any others that were local to the previous buffer */ | |
938 | ||
939 | if (old_buf) | |
265a9e55 | 940 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
941 | { |
942 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
943 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
944 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
945 | && (tem = XTYPE (XCONS (valcontents)->car), | |
946 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
947 | || tem == Lisp_Objfwd))) | |
948 | /* Just reference the variable | |
949 | to cause it to become set for this buffer. */ | |
950 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
951 | } | |
952 | } | |
953 | ||
954 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, | |
955 | "Make the buffer BUFFER current for editing operations.\n\ | |
956 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
957 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
958 | This function does not display the buffer, so its effect ends\n\ | |
959 | when the current command terminates.\n\ | |
960 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
961 | (bufname) | |
962 | register Lisp_Object bufname; | |
963 | { | |
964 | register Lisp_Object buffer; | |
965 | buffer = Fget_buffer (bufname); | |
265a9e55 | 966 | if (NILP (buffer)) |
1ab256cb | 967 | nsberror (bufname); |
265a9e55 | 968 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
969 | error ("Selecting deleted buffer"); |
970 | set_buffer_internal (XBUFFER (buffer)); | |
971 | return buffer; | |
972 | } | |
973 | \f | |
974 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
975 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
976 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
977 | () | |
978 | { | |
a96b68f1 RS |
979 | if (!NILP (current_buffer->read_only) |
980 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
981 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
982 | return Qnil; | |
983 | } | |
984 | ||
985 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
986 | "Put BUFFER at the end of the list of all buffers.\n\ | |
987 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 988 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
989 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
990 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
991 | selected window if it is displayed there.") | |
1ab256cb RM |
992 | (buf) |
993 | register Lisp_Object buf; | |
994 | { | |
b271272a | 995 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 996 | if (NILP (buf)) |
a5611885 JB |
997 | { |
998 | XSET (buf, Lisp_Buffer, current_buffer); | |
999 | ||
1000 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 1001 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 1002 | } |
1ab256cb RM |
1003 | else |
1004 | { | |
1005 | Lisp_Object buf1; | |
1006 | ||
1007 | buf1 = Fget_buffer (buf); | |
265a9e55 | 1008 | if (NILP (buf1)) |
1ab256cb RM |
1009 | nsberror (buf); |
1010 | buf = buf1; | |
b271272a JB |
1011 | } |
1012 | ||
a5611885 | 1013 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
1014 | { |
1015 | register Lisp_Object aelt, link; | |
1016 | ||
1017 | aelt = Frassq (buf, Vbuffer_alist); | |
1018 | link = Fmemq (aelt, Vbuffer_alist); | |
1019 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1020 | XCONS (link)->cdr = Qnil; | |
1021 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1022 | } | |
1ab256cb | 1023 | |
1ab256cb RM |
1024 | return Qnil; |
1025 | } | |
1026 | \f | |
c922bc55 | 1027 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1028 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1029 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1030 | so the buffer is truly empty after this.") |
1031 | () | |
1032 | { | |
1033 | Fwiden (); | |
1034 | del_range (BEG, Z); | |
1035 | current_buffer->last_window_start = 1; | |
1036 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1037 | if future size is less than past size. Use of erase-buffer | |
1038 | implies that the future text is not really related to the past text. */ | |
1039 | XFASTINT (current_buffer->save_length) = 0; | |
1040 | return Qnil; | |
1041 | } | |
1042 | ||
1043 | validate_region (b, e) | |
1044 | register Lisp_Object *b, *e; | |
1045 | { | |
1046 | register int i; | |
1047 | ||
1048 | CHECK_NUMBER_COERCE_MARKER (*b, 0); | |
1049 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1050 | ||
1051 | if (XINT (*b) > XINT (*e)) | |
1052 | { | |
1053 | i = XFASTINT (*b); /* This is legit even if *b is < 0 */ | |
1054 | *b = *e; | |
1055 | XFASTINT (*e) = i; /* because this is all we do with i. */ | |
1056 | } | |
1057 | ||
1058 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1059 | && XINT (*e) <= ZV)) | |
1060 | args_out_of_range (*b, *e); | |
1061 | } | |
1062 | \f | |
1063 | Lisp_Object | |
1064 | list_buffers_1 (files) | |
1065 | Lisp_Object files; | |
1066 | { | |
1067 | register Lisp_Object tail, tem, buf; | |
1068 | Lisp_Object col1, col2, col3, minspace; | |
1069 | register struct buffer *old = current_buffer, *b; | |
718cde7d | 1070 | Lisp_Object desired_point; |
1ab256cb RM |
1071 | Lisp_Object other_file_symbol; |
1072 | ||
718cde7d | 1073 | desired_point = Qnil; |
1ab256cb RM |
1074 | other_file_symbol = intern ("list-buffers-directory"); |
1075 | ||
1076 | XFASTINT (col1) = 19; | |
1077 | XFASTINT (col2) = 25; | |
1078 | XFASTINT (col3) = 40; | |
1079 | XFASTINT (minspace) = 1; | |
1080 | ||
1081 | Fset_buffer (Vstandard_output); | |
1082 | ||
1083 | tail = intern ("Buffer-menu-mode"); | |
1084 | if (!EQ (tail, current_buffer->major_mode) | |
265a9e55 | 1085 | && (tem = Ffboundp (tail), !NILP (tem))) |
1ab256cb RM |
1086 | call0 (tail); |
1087 | Fbuffer_disable_undo (Vstandard_output); | |
1088 | current_buffer->read_only = Qnil; | |
1089 | ||
1090 | write_string ("\ | |
1091 | MR Buffer Size Mode File\n\ | |
1092 | -- ------ ---- ---- ----\n", -1); | |
1093 | ||
265a9e55 | 1094 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
1095 | { |
1096 | buf = Fcdr (Fcar (tail)); | |
1097 | b = XBUFFER (buf); | |
1098 | /* Don't mention the minibuffers. */ | |
1099 | if (XSTRING (b->name)->data[0] == ' ') | |
1100 | continue; | |
1101 | /* Optionally don't mention buffers that lack files. */ | |
265a9e55 | 1102 | if (!NILP (files) && NILP (b->filename)) |
1ab256cb RM |
1103 | continue; |
1104 | /* Identify the current buffer. */ | |
1105 | if (b == old) | |
718cde7d | 1106 | XFASTINT (desired_point) = point; |
1ab256cb RM |
1107 | write_string (b == old ? "." : " ", -1); |
1108 | /* Identify modified buffers */ | |
1109 | write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1); | |
265a9e55 | 1110 | write_string (NILP (b->read_only) ? " " : "% ", -1); |
1ab256cb RM |
1111 | Fprinc (b->name, Qnil); |
1112 | Findent_to (col1, make_number (2)); | |
1113 | XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b); | |
1114 | Fprin1 (tem, Qnil); | |
1115 | Findent_to (col2, minspace); | |
1116 | Fprinc (b->mode_name, Qnil); | |
1117 | Findent_to (col3, minspace); | |
1118 | ||
265a9e55 | 1119 | if (!NILP (b->filename)) |
1ab256cb RM |
1120 | Fprinc (b->filename, Qnil); |
1121 | else | |
1122 | { | |
1123 | /* No visited file; check local value of list-buffers-directory. */ | |
1124 | Lisp_Object tem; | |
1125 | set_buffer_internal (b); | |
1126 | tem = Fboundp (other_file_symbol); | |
265a9e55 | 1127 | if (!NILP (tem)) |
1ab256cb RM |
1128 | { |
1129 | tem = Fsymbol_value (other_file_symbol); | |
1130 | Fset_buffer (Vstandard_output); | |
1131 | if (XTYPE (tem) == Lisp_String) | |
1132 | Fprinc (tem, Qnil); | |
1133 | } | |
1134 | else | |
1135 | Fset_buffer (Vstandard_output); | |
1136 | } | |
1137 | write_string ("\n", -1); | |
1138 | } | |
1139 | ||
1140 | current_buffer->read_only = Qt; | |
1141 | set_buffer_internal (old); | |
718cde7d | 1142 | return desired_point; |
1ab256cb RM |
1143 | } |
1144 | ||
1145 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", | |
1146 | "Display a list of names of existing buffers.\n\ | |
1147 | The list is displayed in a buffer named `*Buffer List*'.\n\ | |
1148 | Note that buffers with names starting with spaces are omitted.\n\ | |
1149 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ | |
1150 | \n\ | |
1151 | The M column contains a * for buffers that are modified.\n\ | |
1152 | The R column contains a % for buffers that are read-only.") | |
1153 | (files) | |
1154 | Lisp_Object files; | |
1155 | { | |
e87f38ef JB |
1156 | Lisp_Object desired_point; |
1157 | ||
fd2dab90 RS |
1158 | desired_point |
1159 | = internal_with_output_to_temp_buffer ("*Buffer List*", | |
1160 | list_buffers_1, files); | |
e87f38ef | 1161 | |
718cde7d JB |
1162 | if (NUMBERP (desired_point)) |
1163 | { | |
1164 | int count = specpdl_ptr - specpdl; | |
1165 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1166 | Fset_buffer (build_string ("*Buffer List*")); | |
1167 | SET_PT (XINT (desired_point)); | |
1168 | return unbind_to (count, Qnil); | |
1169 | } | |
fd2dab90 | 1170 | return Qnil; |
1ab256cb RM |
1171 | } |
1172 | ||
1173 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, | |
1174 | 0, 0, 0, | |
1175 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1176 | Most local variable bindings are eliminated so that the default values\n\ | |
1177 | become effective once more. Also, the syntax table is set from\n\ | |
1178 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1179 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1180 | This function also forces redisplay of the mode line.\n\ | |
1181 | \n\ | |
1182 | Every function to select a new major mode starts by\n\ | |
1183 | calling this function.\n\n\ | |
1184 | As a special exception, local variables whose names have\n\ | |
1185 | a non-nil `permanent-local' property are not eliminated by this function.") | |
1186 | () | |
1187 | { | |
1188 | register Lisp_Object alist, sym, tem; | |
1189 | Lisp_Object oalist; | |
1190 | oalist = current_buffer->local_var_alist; | |
1191 | ||
1192 | /* Make sure no local variables remain set up with this buffer | |
1193 | for their current values. */ | |
1194 | ||
265a9e55 | 1195 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1196 | { |
1197 | sym = XCONS (XCONS (alist)->car)->car; | |
1198 | ||
1199 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1200 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car; | |
1201 | if (XBUFFER (tem) == current_buffer) | |
1202 | { | |
1203 | /* Symbol is set up for this buffer's old local value. | |
1204 | Set it up for the current buffer with the default value. */ | |
1205 | ||
1206 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr; | |
542143d7 RS |
1207 | /* Store the symbol's current value into the alist entry |
1208 | it is currently set up for. This is so that, if the | |
1209 | local is marked permanent, and we make it local again below, | |
1210 | we don't lose the value. */ | |
1211 | XCONS (XCONS (tem)->car)->cdr = XCONS (XSYMBOL (sym)->value)->car; | |
1212 | /* Switch to the symbol's default-value alist entry. */ | |
1ab256cb | 1213 | XCONS (tem)->car = tem; |
542143d7 | 1214 | /* Mark it as current for the current buffer. */ |
1ab256cb | 1215 | XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer (); |
542143d7 | 1216 | /* Store the current value into any forwarding in the symbol. */ |
1ab256cb RM |
1217 | store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car, |
1218 | XCONS (tem)->cdr); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | /* Actually eliminate all local bindings of this buffer. */ | |
1223 | ||
1224 | reset_buffer_local_variables (current_buffer); | |
1225 | ||
1226 | /* Redisplay mode lines; we are changing major mode. */ | |
1227 | ||
1228 | update_mode_lines++; | |
1229 | ||
1230 | /* Any which are supposed to be permanent, | |
1231 | make local again, with the same values they had. */ | |
1232 | ||
265a9e55 | 1233 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1234 | { |
1235 | sym = XCONS (XCONS (alist)->car)->car; | |
1236 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1237 | if (! NILP (tem)) |
01050cb5 RM |
1238 | { |
1239 | Fmake_local_variable (sym); | |
1240 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1241 | } | |
1ab256cb RM |
1242 | } |
1243 | ||
1244 | /* Force mode-line redisplay. Useful here because all major mode | |
1245 | commands call this function. */ | |
1246 | update_mode_lines++; | |
1247 | ||
1248 | return Qnil; | |
1249 | } | |
1250 | \f | |
2eec3b4e RS |
1251 | /* Find all the overlays in the current buffer that contain position POS. |
1252 | Return the number found, and store them in a vector in *VEC_PTR. | |
1253 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1254 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1255 | or ZV if there are no more overlays. | |
2eec3b4e RS |
1256 | |
1257 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1258 | when this function is called. |
1259 | ||
1260 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1261 | If EXTEND is zero, we never extend the vector, | |
1262 | and we store only as many overlays as will fit. | |
1263 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1264 | |
1265 | int | |
61d54cd5 | 1266 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr) |
2eec3b4e | 1267 | int pos; |
61d54cd5 | 1268 | int extend; |
2eec3b4e RS |
1269 | Lisp_Object **vec_ptr; |
1270 | int *len_ptr; | |
1271 | int *next_ptr; | |
1ab256cb | 1272 | { |
2eec3b4e RS |
1273 | Lisp_Object tail, overlay, start, end, result; |
1274 | int idx = 0; | |
1275 | int len = *len_ptr; | |
1276 | Lisp_Object *vec = *vec_ptr; | |
1277 | int next = ZV; | |
61d54cd5 RS |
1278 | int inhibit_storing = 0; |
1279 | ||
2eec3b4e RS |
1280 | for (tail = current_buffer->overlays_before; |
1281 | CONSP (tail); | |
1282 | tail = XCONS (tail)->cdr) | |
1283 | { | |
52f8ec73 JB |
1284 | int startpos; |
1285 | ||
2eec3b4e RS |
1286 | overlay = XCONS (tail)->car; |
1287 | if (! OVERLAY_VALID (overlay)) | |
52f8ec73 | 1288 | abort (); |
1ab256cb | 1289 | |
2eec3b4e RS |
1290 | start = OVERLAY_START (overlay); |
1291 | end = OVERLAY_END (overlay); | |
1292 | if (OVERLAY_POSITION (end) <= pos) | |
1293 | break; | |
1294 | startpos = OVERLAY_POSITION (start); | |
1295 | if (startpos <= pos) | |
1296 | { | |
1297 | if (idx == len) | |
1298 | { | |
61d54cd5 RS |
1299 | /* The supplied vector is full. |
1300 | Either make it bigger, or don't store any more in it. */ | |
1301 | if (extend) | |
1302 | { | |
1303 | *len_ptr = len *= 2; | |
1304 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1305 | *vec_ptr = vec; | |
1306 | } | |
1307 | else | |
1308 | inhibit_storing = 1; | |
2eec3b4e | 1309 | } |
61d54cd5 RS |
1310 | |
1311 | if (!inhibit_storing) | |
1312 | vec[idx] = overlay; | |
1313 | /* Keep counting overlays even if we can't return them all. */ | |
1314 | idx++; | |
2eec3b4e RS |
1315 | } |
1316 | else if (startpos < next) | |
1317 | next = startpos; | |
1318 | } | |
1319 | ||
1320 | for (tail = current_buffer->overlays_after; | |
1321 | CONSP (tail); | |
1322 | tail = XCONS (tail)->cdr) | |
1ab256cb | 1323 | { |
52f8ec73 JB |
1324 | int startpos; |
1325 | ||
2eec3b4e RS |
1326 | overlay = XCONS (tail)->car; |
1327 | if (! OVERLAY_VALID (overlay)) | |
52f8ec73 | 1328 | abort (); |
2eec3b4e RS |
1329 | |
1330 | start = OVERLAY_START (overlay); | |
1331 | end = OVERLAY_END (overlay); | |
1332 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1333 | if (pos < startpos) |
2eec3b4e RS |
1334 | { |
1335 | if (startpos < next) | |
1336 | next = startpos; | |
1337 | break; | |
1338 | } | |
52f8ec73 | 1339 | if (pos < OVERLAY_POSITION (end)) |
2eec3b4e RS |
1340 | { |
1341 | if (idx == len) | |
1342 | { | |
61d54cd5 RS |
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 | idx++; | |
2eec3b4e | 1356 | } |
1ab256cb RM |
1357 | } |
1358 | ||
2eec3b4e RS |
1359 | *next_ptr = next; |
1360 | return idx; | |
1361 | } | |
1362 | \f | |
5c4f68f1 | 1363 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1364 | |
2eec3b4e | 1365 | void |
5c4f68f1 JB |
1366 | recenter_overlay_lists (buf, pos) |
1367 | struct buffer *buf; | |
2eec3b4e RS |
1368 | int pos; |
1369 | { | |
1370 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1371 | ||
1372 | /* See if anything in overlays_before should move to overlays_after. */ | |
1373 | ||
1374 | /* We don't strictly need prev in this loop; it should always be nil. | |
1375 | But we use it for symmetry and in case that should cease to be true | |
1376 | with some future change. */ | |
1377 | prev = Qnil; | |
5c4f68f1 | 1378 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1379 | CONSP (tail); |
1380 | prev = tail, tail = next) | |
1ab256cb | 1381 | { |
2eec3b4e RS |
1382 | next = XCONS (tail)->cdr; |
1383 | overlay = XCONS (tail)->car; | |
1384 | ||
1385 | /* If the overlay is not valid, get rid of it. */ | |
1386 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1387 | #if 1 |
1388 | abort (); | |
1389 | #else | |
2eec3b4e RS |
1390 | { |
1391 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1392 | if (!NILP (prev)) | |
1393 | XCONS (prev)->cdr = next; | |
1394 | else | |
5c4f68f1 | 1395 | buf->overlays_before = next; |
2eec3b4e RS |
1396 | tail = prev; |
1397 | continue; | |
1398 | } | |
52f8ec73 | 1399 | #endif |
1ab256cb | 1400 | |
2eec3b4e RS |
1401 | beg = OVERLAY_START (overlay); |
1402 | end = OVERLAY_END (overlay); | |
1ab256cb | 1403 | |
2eec3b4e | 1404 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1405 | { |
2eec3b4e RS |
1406 | /* OVERLAY needs to be moved. */ |
1407 | int where = OVERLAY_POSITION (beg); | |
1408 | Lisp_Object other, other_prev; | |
1409 | ||
1410 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1411 | if (!NILP (prev)) | |
1412 | XCONS (prev)->cdr = next; | |
1413 | else | |
5c4f68f1 | 1414 | buf->overlays_before = next; |
2eec3b4e RS |
1415 | |
1416 | /* Search thru overlays_after for where to put it. */ | |
1417 | other_prev = Qnil; | |
5c4f68f1 | 1418 | for (other = buf->overlays_after; |
2eec3b4e RS |
1419 | CONSP (other); |
1420 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1421 | { |
2eec3b4e RS |
1422 | Lisp_Object otherbeg, otheroverlay, follower; |
1423 | int win; | |
1424 | ||
1425 | otheroverlay = XCONS (other)->car; | |
1426 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1427 | abort (); |
2eec3b4e RS |
1428 | |
1429 | otherbeg = OVERLAY_START (otheroverlay); | |
1430 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1431 | break; | |
1ab256cb | 1432 | } |
2eec3b4e RS |
1433 | |
1434 | /* Add TAIL to overlays_after before OTHER. */ | |
1435 | XCONS (tail)->cdr = other; | |
1436 | if (!NILP (other_prev)) | |
1437 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1438 | else |
5c4f68f1 | 1439 | buf->overlays_after = tail; |
2eec3b4e | 1440 | tail = prev; |
1ab256cb | 1441 | } |
2eec3b4e RS |
1442 | else |
1443 | /* We've reached the things that should stay in overlays_before. | |
1444 | All the rest of overlays_before must end even earlier, | |
1445 | so stop now. */ | |
1446 | break; | |
1447 | } | |
1448 | ||
1449 | /* See if anything in overlays_after should be in overlays_before. */ | |
1450 | prev = Qnil; | |
5c4f68f1 | 1451 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1452 | CONSP (tail); |
1453 | prev = tail, tail = next) | |
1454 | { | |
1455 | next = XCONS (tail)->cdr; | |
1456 | overlay = XCONS (tail)->car; | |
1457 | ||
1458 | /* If the overlay is not valid, get rid of it. */ | |
1459 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1460 | #if 1 |
1461 | abort (); | |
1462 | #else | |
2eec3b4e RS |
1463 | { |
1464 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1465 | if (!NILP (prev)) | |
1466 | XCONS (prev)->cdr = next; | |
1467 | else | |
5c4f68f1 | 1468 | buf->overlays_after = next; |
2eec3b4e RS |
1469 | tail = prev; |
1470 | continue; | |
1471 | } | |
52f8ec73 | 1472 | #endif |
2eec3b4e RS |
1473 | |
1474 | beg = OVERLAY_START (overlay); | |
1475 | end = OVERLAY_END (overlay); | |
1476 | ||
1477 | /* Stop looking, when we know that nothing further | |
1478 | can possibly end before POS. */ | |
1479 | if (OVERLAY_POSITION (beg) > pos) | |
1480 | break; | |
1481 | ||
1482 | if (OVERLAY_POSITION (end) <= pos) | |
1483 | { | |
1484 | /* OVERLAY needs to be moved. */ | |
1485 | int where = OVERLAY_POSITION (end); | |
1486 | Lisp_Object other, other_prev; | |
1487 | ||
1488 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1489 | if (!NILP (prev)) | |
1490 | XCONS (prev)->cdr = next; | |
1491 | else | |
5c4f68f1 | 1492 | buf->overlays_after = next; |
2eec3b4e RS |
1493 | |
1494 | /* Search thru overlays_before for where to put it. */ | |
1495 | other_prev = Qnil; | |
5c4f68f1 | 1496 | for (other = buf->overlays_before; |
2eec3b4e RS |
1497 | CONSP (other); |
1498 | other_prev = other, other = XCONS (other)->cdr) | |
1499 | { | |
1500 | Lisp_Object otherend, otheroverlay; | |
1501 | int win; | |
1502 | ||
1503 | otheroverlay = XCONS (other)->car; | |
1504 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1505 | abort (); |
2eec3b4e RS |
1506 | |
1507 | otherend = OVERLAY_END (otheroverlay); | |
1508 | if (OVERLAY_POSITION (otherend) <= where) | |
1509 | break; | |
1510 | } | |
1511 | ||
1512 | /* Add TAIL to overlays_before before OTHER. */ | |
1513 | XCONS (tail)->cdr = other; | |
1514 | if (!NILP (other_prev)) | |
1515 | XCONS (other_prev)->cdr = tail; | |
1516 | else | |
5c4f68f1 | 1517 | buf->overlays_before = tail; |
2eec3b4e RS |
1518 | tail = prev; |
1519 | } | |
1520 | } | |
1521 | ||
5c4f68f1 | 1522 | XFASTINT (buf->overlay_center) = pos; |
2eec3b4e RS |
1523 | } |
1524 | \f | |
52f8ec73 JB |
1525 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1526 | "Return t if OBJECT is an overlay.") | |
1527 | (object) | |
1528 | Lisp_Object object; | |
1529 | { | |
1530 | return (OVERLAYP (object) ? Qt : Qnil); | |
1531 | } | |
1532 | ||
5c4f68f1 JB |
1533 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1534 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1535 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1536 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1537 | (beg, end, buffer) |
1538 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1539 | { |
1540 | Lisp_Object overlay; | |
5c4f68f1 | 1541 | struct buffer *b; |
2eec3b4e | 1542 | |
5c4f68f1 JB |
1543 | if (NILP (buffer)) |
1544 | XSET (buffer, Lisp_Buffer, current_buffer); | |
883047b9 JB |
1545 | else |
1546 | CHECK_BUFFER (buffer, 2); | |
1547 | if (MARKERP (beg) | |
1548 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1549 | error ("Marker points into wrong buffer"); | |
1550 | if (MARKERP (end) | |
1551 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1552 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 1553 | |
883047b9 JB |
1554 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1555 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 1556 | |
883047b9 | 1557 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 1558 | { |
883047b9 JB |
1559 | Lisp_Object temp = beg; |
1560 | beg = end; end = temp; | |
5c4f68f1 | 1561 | } |
883047b9 JB |
1562 | |
1563 | b = XBUFFER (buffer); | |
1564 | ||
1565 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
1566 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 JB |
1567 | |
1568 | overlay = Fcons (Fcons (beg, end), Qnil); | |
52f8ec73 | 1569 | XSETTYPE (overlay, Lisp_Overlay); |
2eec3b4e RS |
1570 | |
1571 | /* Put the new overlay on the wrong list. */ | |
1572 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1573 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1574 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1575 | else |
5c4f68f1 | 1576 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1577 | |
1578 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1579 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1580 | |
b61982dd JB |
1581 | /* We don't need to redisplay the region covered by the overlay, because |
1582 | the overlay has no properties at the moment. */ | |
1583 | ||
2eec3b4e RS |
1584 | return overlay; |
1585 | } | |
1586 | ||
5c4f68f1 JB |
1587 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
1588 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
1589 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
1590 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
1591 | buffer.") | |
5c4f68f1 JB |
1592 | (overlay, beg, end, buffer) |
1593 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 1594 | { |
0a4469c9 RS |
1595 | struct buffer *b, *ob; |
1596 | Lisp_Object obuffer; | |
1597 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 1598 | |
52f8ec73 | 1599 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
1600 | if (NILP (buffer)) |
1601 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a JB |
1602 | if (NILP (buffer)) |
1603 | XSET (buffer, Lisp_Buffer, current_buffer); | |
5c4f68f1 | 1604 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
1605 | |
1606 | if (MARKERP (beg) | |
1607 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1608 | error ("Marker points into wrong buffer"); | |
1609 | if (MARKERP (end) | |
1610 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1611 | error ("Marker points into wrong buffer"); | |
1612 | ||
b61982dd JB |
1613 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1614 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
1615 | ||
0a4469c9 RS |
1616 | specbind (Qinhibit_quit, Qt); |
1617 | ||
b61982dd JB |
1618 | if (XINT (beg) > XINT (end)) |
1619 | { | |
1620 | Lisp_Object temp = beg; | |
1621 | beg = end; end = temp; | |
1622 | } | |
1623 | ||
0a4469c9 | 1624 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 1625 | b = XBUFFER (buffer); |
0a4469c9 | 1626 | ob = XBUFFER (obuffer); |
2eec3b4e | 1627 | |
c82ed728 | 1628 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 1629 | if (!EQ (buffer, obuffer)) |
c82ed728 JB |
1630 | windows_or_buffers_changed = 1; |
1631 | else | |
1632 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
1633 | { | |
be8b1c6b RS |
1634 | Lisp_Object o_beg; |
1635 | Lisp_Object o_end; | |
c82ed728 JB |
1636 | int change_beg, change_end; |
1637 | ||
be8b1c6b RS |
1638 | o_beg = OVERLAY_START (overlay); |
1639 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
1640 | o_beg = OVERLAY_POSITION (o_beg); |
1641 | o_end = OVERLAY_POSITION (o_end); | |
1642 | ||
1643 | if (XINT (o_beg) == XINT (beg)) | |
1644 | redisplay_region (b, XINT (o_end), XINT (end)); | |
1645 | else if (XINT (o_end) == XINT (end)) | |
1646 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
1647 | else | |
1648 | { | |
1649 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
1650 | if (XINT (end) > XINT (o_end)) o_end = end; | |
1651 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
1652 | } | |
1653 | } | |
b61982dd | 1654 | |
0a4469c9 RS |
1655 | if (!NILP (obuffer)) |
1656 | { | |
1657 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
1658 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
1659 | } | |
5c4f68f1 JB |
1660 | |
1661 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
1662 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
1663 | |
1664 | /* Put the overlay on the wrong list. */ | |
1665 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1666 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1667 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1668 | else |
5c4f68f1 | 1669 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1670 | |
1671 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1672 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1673 | |
0a4469c9 | 1674 | return unbind_to (count, overlay); |
2eec3b4e RS |
1675 | } |
1676 | ||
1677 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 1678 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 1679 | (overlay) |
5c4f68f1 | 1680 | Lisp_Object overlay; |
2eec3b4e | 1681 | { |
0a4469c9 | 1682 | Lisp_Object buffer; |
5c4f68f1 | 1683 | struct buffer *b; |
0a4469c9 | 1684 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 1685 | |
52f8ec73 JB |
1686 | CHECK_OVERLAY (overlay, 0); |
1687 | ||
0a4469c9 RS |
1688 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
1689 | if (NILP (buffer)) | |
1690 | return Qnil; | |
1691 | ||
1692 | b = XBUFFER (buffer); | |
1693 | ||
1694 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
1695 | |
1696 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
1697 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
1698 | ||
b61982dd | 1699 | redisplay_region (b, |
a927f5c9 RS |
1700 | marker_position (OVERLAY_START (overlay)), |
1701 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 1702 | |
3ece337a JB |
1703 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
1704 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
1705 | ||
0a4469c9 | 1706 | return unbind_to (count, Qnil); |
2eec3b4e RS |
1707 | } |
1708 | \f | |
8ebafa8d JB |
1709 | /* Overlay dissection functions. */ |
1710 | ||
1711 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
1712 | "Return the position at which OVERLAY starts.") | |
1713 | (overlay) | |
1714 | Lisp_Object overlay; | |
1715 | { | |
1716 | CHECK_OVERLAY (overlay, 0); | |
1717 | ||
1718 | return (Fmarker_position (OVERLAY_START (overlay))); | |
1719 | } | |
1720 | ||
1721 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
1722 | "Return the position at which OVERLAY ends.") | |
1723 | (overlay) | |
1724 | Lisp_Object overlay; | |
1725 | { | |
1726 | CHECK_OVERLAY (overlay, 0); | |
1727 | ||
1728 | return (Fmarker_position (OVERLAY_END (overlay))); | |
1729 | } | |
1730 | ||
1731 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
1732 | "Return the buffer OVERLAY belongs to.") | |
1733 | (overlay) | |
1734 | Lisp_Object overlay; | |
1735 | { | |
1736 | CHECK_OVERLAY (overlay, 0); | |
1737 | ||
1738 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
1739 | } | |
1740 | ||
1741 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
1742 | "Return a list of the properties on OVERLAY.\n\ | |
1743 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
1744 | OVERLAY.") | |
1745 | (overlay) | |
1746 | Lisp_Object overlay; | |
1747 | { | |
1748 | CHECK_OVERLAY (overlay, 0); | |
1749 | ||
1750 | return Fcopy_sequence (Fcdr_safe (XCONS (overlay)->cdr)); | |
1751 | } | |
1752 | ||
1753 | \f | |
2eec3b4e | 1754 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 1755 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
1756 | (pos) |
1757 | Lisp_Object pos; | |
1758 | { | |
1759 | int noverlays; | |
1760 | int endpos; | |
1761 | Lisp_Object *overlay_vec; | |
1762 | int len; | |
1763 | Lisp_Object result; | |
1764 | ||
1765 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1766 | ||
1767 | len = 10; | |
1768 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1769 | ||
1770 | /* Put all the overlays we want in a vector in overlay_vec. | |
1771 | Store the length in len. */ | |
61d54cd5 | 1772 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos); |
2eec3b4e RS |
1773 | |
1774 | /* Make a list of them all. */ | |
1775 | result = Flist (noverlays, overlay_vec); | |
1776 | ||
9ac0d9e0 | 1777 | xfree (overlay_vec); |
2eec3b4e RS |
1778 | return result; |
1779 | } | |
1780 | ||
1781 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
1782 | 1, 1, 0, | |
1783 | "Return the next position after POS where an overlay starts or ends.") | |
1784 | (pos) | |
1785 | Lisp_Object pos; | |
1786 | { | |
1787 | int noverlays; | |
1788 | int endpos; | |
1789 | Lisp_Object *overlay_vec; | |
1790 | int len; | |
1791 | Lisp_Object result; | |
1792 | int i; | |
1793 | ||
1794 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1795 | ||
1796 | len = 10; | |
1797 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1798 | ||
1799 | /* Put all the overlays we want in a vector in overlay_vec. | |
1800 | Store the length in len. | |
1801 | endpos gets the position where the next overlay starts. */ | |
61d54cd5 | 1802 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos); |
2eec3b4e RS |
1803 | |
1804 | /* If any of these overlays ends before endpos, | |
1805 | use its ending point instead. */ | |
1806 | for (i = 0; i < noverlays; i++) | |
1807 | { | |
1808 | Lisp_Object oend; | |
1809 | int oendpos; | |
1810 | ||
1811 | oend = OVERLAY_END (overlay_vec[i]); | |
1812 | oendpos = OVERLAY_POSITION (oend); | |
1813 | if (oendpos < endpos) | |
1814 | endpos = oendpos; | |
1ab256cb RM |
1815 | } |
1816 | ||
9ac0d9e0 | 1817 | xfree (overlay_vec); |
2eec3b4e RS |
1818 | return make_number (endpos); |
1819 | } | |
1820 | \f | |
1821 | /* These functions are for debugging overlays. */ | |
1822 | ||
1823 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
1824 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
1825 | The car has all the overlays before the overlay center;\n\ | |
1826 | the cdr has all the overlays before the overlay center.\n\ | |
1827 | Recentering overlays moves overlays between these lists.\n\ | |
1828 | The lists you get are copies, so that changing them has no effect.\n\ | |
1829 | However, the overlays you get are the real objects that the buffer uses.") | |
1830 | () | |
1831 | { | |
1832 | Lisp_Object before, after; | |
1833 | before = current_buffer->overlays_before; | |
1834 | if (CONSP (before)) | |
1835 | before = Fcopy_sequence (before); | |
1836 | after = current_buffer->overlays_after; | |
1837 | if (CONSP (after)) | |
1838 | after = Fcopy_sequence (after); | |
1839 | ||
1840 | return Fcons (before, after); | |
1841 | } | |
1842 | ||
1843 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
1844 | "Recenter the overlays of the current buffer around position POS.") | |
1845 | (pos) | |
1846 | Lisp_Object pos; | |
1847 | { | |
1848 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1849 | ||
5c4f68f1 | 1850 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
1851 | return Qnil; |
1852 | } | |
1853 | \f | |
1854 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
1855 | "Get the property of overlay OVERLAY with property name NAME.") | |
1856 | (overlay, prop) | |
1857 | Lisp_Object overlay, prop; | |
1858 | { | |
1859 | Lisp_Object plist; | |
52f8ec73 JB |
1860 | |
1861 | CHECK_OVERLAY (overlay, 0); | |
1862 | ||
1863 | for (plist = Fcdr_safe (XCONS (overlay)->cdr); | |
2eec3b4e RS |
1864 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
1865 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
1866 | { | |
1867 | if (EQ (XCONS (plist)->car, prop)) | |
1868 | return XCONS (XCONS (plist)->cdr)->car; | |
1869 | } | |
52f8ec73 JB |
1870 | |
1871 | return Qnil; | |
2eec3b4e RS |
1872 | } |
1873 | ||
1874 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
1875 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
1876 | (overlay, prop, value) | |
1877 | Lisp_Object overlay, prop, value; | |
1878 | { | |
1879 | Lisp_Object plist, tail; | |
1880 | ||
52f8ec73 | 1881 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 1882 | |
25d16451 RS |
1883 | tail = Fmarker_buffer (OVERLAY_START (overlay)); |
1884 | if (! NILP (tail)) | |
1885 | redisplay_region (XMARKER (OVERLAY_START (overlay))->buffer, | |
1886 | marker_position (OVERLAY_START (overlay)), | |
1887 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 1888 | |
52f8ec73 | 1889 | plist = Fcdr_safe (XCONS (overlay)->cdr); |
2eec3b4e RS |
1890 | |
1891 | for (tail = plist; | |
1892 | CONSP (tail) && CONSP (XCONS (tail)->cdr); | |
1893 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
1894 | { | |
1895 | if (EQ (XCONS (tail)->car, prop)) | |
1896 | return XCONS (XCONS (tail)->cdr)->car = value; | |
1897 | } | |
1898 | ||
1899 | if (! CONSP (XCONS (overlay)->cdr)) | |
1900 | XCONS (overlay)->cdr = Fcons (Qnil, Qnil); | |
1901 | ||
1902 | XCONS (XCONS (overlay)->cdr)->cdr | |
1903 | = Fcons (prop, Fcons (value, plist)); | |
1904 | ||
1905 | return value; | |
1ab256cb RM |
1906 | } |
1907 | \f | |
173f2a64 RS |
1908 | /* Run the modification-hooks of overlays that include |
1909 | any part of the text in START to END. | |
1910 | Run the insert-before-hooks of overlay starting at END, | |
1911 | and the insert-after-hooks of overlay ending at START. */ | |
1912 | ||
1913 | void | |
1914 | verify_overlay_modification (start, end) | |
1915 | Lisp_Object start, end; | |
1916 | { | |
1917 | Lisp_Object prop, overlay, tail; | |
1918 | int insertion = EQ (start, end); | |
1919 | ||
1920 | for (tail = current_buffer->overlays_before; | |
1921 | CONSP (tail); | |
1922 | tail = XCONS (tail)->cdr) | |
1923 | { | |
1924 | int startpos, endpos; | |
be8b1c6b | 1925 | Lisp_Object ostart, oend; |
173f2a64 RS |
1926 | |
1927 | overlay = XCONS (tail)->car; | |
1928 | ||
1929 | ostart = OVERLAY_START (overlay); | |
1930 | oend = OVERLAY_END (overlay); | |
1931 | endpos = OVERLAY_POSITION (oend); | |
1932 | if (XFASTINT (start) > endpos) | |
1933 | break; | |
1934 | startpos = OVERLAY_POSITION (ostart); | |
1935 | if (XFASTINT (end) == startpos && insertion) | |
1936 | { | |
1937 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
1938 | call_overlay_mod_hooks (prop, overlay, start, end); | |
1939 | } | |
1940 | if (XFASTINT (start) == endpos && insertion) | |
1941 | { | |
1942 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
1943 | call_overlay_mod_hooks (prop, overlay, start, end); | |
1944 | } | |
1945 | if (insertion | |
1946 | ? (XFASTINT (start) > startpos && XFASTINT (end) < endpos) | |
1947 | : (XFASTINT (start) >= startpos && XFASTINT (end) <= endpos)) | |
1948 | { | |
1949 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
1950 | call_overlay_mod_hooks (prop, overlay, start, end); | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | for (tail = current_buffer->overlays_after; | |
1955 | CONSP (tail); | |
1956 | tail = XCONS (tail)->cdr) | |
1957 | { | |
1958 | int startpos, endpos; | |
be8b1c6b | 1959 | Lisp_Object ostart, oend; |
173f2a64 RS |
1960 | |
1961 | overlay = XCONS (tail)->car; | |
1962 | ||
1963 | ostart = OVERLAY_START (overlay); | |
1964 | oend = OVERLAY_END (overlay); | |
1965 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 1966 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
1967 | if (XFASTINT (end) < startpos) |
1968 | break; | |
1969 | if (XFASTINT (end) == startpos && insertion) | |
1970 | { | |
1971 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
1972 | call_overlay_mod_hooks (prop, overlay, start, end); | |
1973 | } | |
1974 | if (XFASTINT (start) == endpos && insertion) | |
1975 | { | |
1976 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
1977 | call_overlay_mod_hooks (prop, overlay, start, end); | |
1978 | } | |
1979 | if (insertion | |
1980 | ? (XFASTINT (start) > startpos && XFASTINT (end) < endpos) | |
1981 | : (XFASTINT (start) >= startpos && XFASTINT (end) <= endpos)) | |
1982 | { | |
1983 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
1984 | call_overlay_mod_hooks (prop, overlay, start, end); | |
1985 | } | |
1986 | } | |
1987 | } | |
1988 | ||
1989 | static void | |
1990 | call_overlay_mod_hooks (list, overlay, start, end) | |
1991 | Lisp_Object list, overlay, start, end; | |
1992 | { | |
1993 | struct gcpro gcpro1; | |
1994 | GCPRO1 (list); | |
1995 | while (!NILP (list)) | |
1996 | { | |
1997 | call3 (Fcar (list), overlay, start, end); | |
1998 | list = Fcdr (list); | |
1999 | } | |
2000 | UNGCPRO; | |
2001 | } | |
2002 | \f | |
0fa3ba92 JB |
2003 | /* Somebody has tried to store NEWVAL into the buffer-local slot with |
2004 | offset XUINT (valcontents), and NEWVAL has an unacceptable type. */ | |
2005 | void | |
2006 | buffer_slot_type_mismatch (valcontents, newval) | |
2007 | Lisp_Object valcontents, newval; | |
2008 | { | |
2009 | unsigned int offset = XUINT (valcontents); | |
5fcd022d | 2010 | unsigned char *symbol_name = |
0fa3ba92 JB |
2011 | (XSYMBOL (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
2012 | ->name->data); | |
2013 | char *type_name; | |
2014 | ||
2015 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) | |
2016 | { | |
2017 | case Lisp_Int: type_name = "integers"; break; | |
2018 | case Lisp_String: type_name = "strings"; break; | |
2019 | case Lisp_Marker: type_name = "markers"; break; | |
2020 | case Lisp_Symbol: type_name = "symbols"; break; | |
2021 | case Lisp_Cons: type_name = "lists"; break; | |
5fcd022d | 2022 | case Lisp_Vector: type_name = "vectors"; break; |
0fa3ba92 JB |
2023 | default: |
2024 | abort (); | |
2025 | } | |
2026 | ||
2027 | error ("only %s should be stored in the buffer-local variable %s", | |
2028 | type_name, symbol_name); | |
2029 | } | |
2030 | \f | |
1ab256cb RM |
2031 | init_buffer_once () |
2032 | { | |
2033 | register Lisp_Object tem; | |
2034 | ||
2035 | /* Make sure all markable slots in buffer_defaults | |
2036 | are initialized reasonably, so mark_buffer won't choke. */ | |
2037 | reset_buffer (&buffer_defaults); | |
2038 | reset_buffer (&buffer_local_symbols); | |
2039 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); | |
2040 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); | |
2041 | ||
2042 | /* Set up the default values of various buffer slots. */ | |
2043 | /* Must do these before making the first buffer! */ | |
2044 | ||
2045 | /* real setup is done in loaddefs.el */ | |
2046 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2047 | buffer_defaults.abbrev_mode = Qnil; | |
2048 | buffer_defaults.overwrite_mode = Qnil; | |
2049 | buffer_defaults.case_fold_search = Qt; | |
2050 | buffer_defaults.auto_fill_function = Qnil; | |
2051 | buffer_defaults.selective_display = Qnil; | |
2052 | #ifndef old | |
2053 | buffer_defaults.selective_display_ellipses = Qt; | |
2054 | #endif | |
2055 | buffer_defaults.abbrev_table = Qnil; | |
2056 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2057 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2058 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2059 | buffer_defaults.overlays_before = Qnil; |
2060 | buffer_defaults.overlays_after = Qnil; | |
2061 | XFASTINT (buffer_defaults.overlay_center) = 1; | |
1ab256cb RM |
2062 | |
2063 | XFASTINT (buffer_defaults.tab_width) = 8; | |
2064 | buffer_defaults.truncate_lines = Qnil; | |
2065 | buffer_defaults.ctl_arrow = Qt; | |
2066 | ||
2067 | XFASTINT (buffer_defaults.fill_column) = 70; | |
2068 | XFASTINT (buffer_defaults.left_margin) = 0; | |
2069 | ||
2070 | /* Assign the local-flags to the slots that have default values. | |
2071 | The local flag is a bit that is used in the buffer | |
2072 | to say that it has its own local value for the slot. | |
2073 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2074 | ||
2075 | /* Nothing can work if this isn't true */ | |
2076 | if (sizeof (int) != sizeof (Lisp_Object)) abort (); | |
2077 | ||
2078 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2079 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
2080 | XFASTINT (buffer_local_flags.filename) = -1; | |
2081 | XFASTINT (buffer_local_flags.directory) = -1; | |
2082 | XFASTINT (buffer_local_flags.backed_up) = -1; | |
2083 | XFASTINT (buffer_local_flags.save_length) = -1; | |
2084 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; | |
2085 | XFASTINT (buffer_local_flags.read_only) = -1; | |
2086 | XFASTINT (buffer_local_flags.major_mode) = -1; | |
2087 | XFASTINT (buffer_local_flags.mode_name) = -1; | |
2088 | XFASTINT (buffer_local_flags.undo_list) = -1; | |
c48f61ef | 2089 | XFASTINT (buffer_local_flags.mark_active) = -1; |
1ab256cb RM |
2090 | |
2091 | XFASTINT (buffer_local_flags.mode_line_format) = 1; | |
2092 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; | |
2093 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; | |
2094 | XFASTINT (buffer_local_flags.case_fold_search) = 8; | |
2095 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; | |
2096 | XFASTINT (buffer_local_flags.selective_display) = 0x20; | |
2097 | #ifndef old | |
2098 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; | |
2099 | #endif | |
2100 | XFASTINT (buffer_local_flags.tab_width) = 0x80; | |
2101 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; | |
2102 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; | |
2103 | XFASTINT (buffer_local_flags.fill_column) = 0x400; | |
2104 | XFASTINT (buffer_local_flags.left_margin) = 0x800; | |
2105 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; | |
2106 | XFASTINT (buffer_local_flags.display_table) = 0x2000; | |
1ab256cb RM |
2107 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
2108 | ||
2109 | Vbuffer_alist = Qnil; | |
2110 | current_buffer = 0; | |
2111 | all_buffers = 0; | |
2112 | ||
2113 | QSFundamental = build_string ("Fundamental"); | |
2114 | ||
2115 | Qfundamental_mode = intern ("fundamental-mode"); | |
2116 | buffer_defaults.major_mode = Qfundamental_mode; | |
2117 | ||
2118 | Qmode_class = intern ("mode-class"); | |
2119 | ||
2120 | Qprotected_field = intern ("protected-field"); | |
2121 | ||
2122 | Qpermanent_local = intern ("permanent-local"); | |
2123 | ||
2124 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2125 | ||
2126 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2127 | /* super-magic invisible buffer */ | |
2128 | Vbuffer_alist = Qnil; | |
2129 | ||
ffd56f97 | 2130 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2131 | } |
2132 | ||
2133 | init_buffer () | |
2134 | { | |
2135 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2136 | char *pwd; |
2137 | struct stat dotstat, pwdstat; | |
136351b7 | 2138 | Lisp_Object temp; |
1ab256cb RM |
2139 | |
2140 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2141 | |
2142 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2143 | when PWD is right, and may avoid a fatal error. */ | |
2144 | if ((pwd = getenv ("PWD")) != 0 && *pwd == '/' | |
2145 | && stat (pwd, &pwdstat) == 0 | |
2146 | && stat (".", &dotstat) == 0 | |
2147 | && dotstat.st_ino == pwdstat.st_ino | |
2148 | && dotstat.st_dev == pwdstat.st_dev | |
2149 | && strlen (pwd) < MAXPATHLEN) | |
2150 | strcpy (buf, pwd); | |
2151 | else if (getwd (buf) == 0) | |
1ab256cb RM |
2152 | fatal ("`getwd' failed: %s.\n", buf); |
2153 | ||
2154 | #ifndef VMS | |
2155 | /* Maybe this should really use some standard subroutine | |
2156 | whose definition is filename syntax dependent. */ | |
2157 | if (buf[strlen (buf) - 1] != '/') | |
2158 | strcat (buf, "/"); | |
2159 | #endif /* not VMS */ | |
2160 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2161 | |
2162 | temp = get_minibuffer (0); | |
2163 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2164 | } |
2165 | ||
2166 | /* initialize the buffer routines */ | |
2167 | syms_of_buffer () | |
2168 | { | |
188d4d11 RM |
2169 | extern Lisp_Object Qdisabled; |
2170 | ||
1ab256cb RM |
2171 | staticpro (&Vbuffer_defaults); |
2172 | staticpro (&Vbuffer_local_symbols); | |
2173 | staticpro (&Qfundamental_mode); | |
2174 | staticpro (&Qmode_class); | |
2175 | staticpro (&QSFundamental); | |
2176 | staticpro (&Vbuffer_alist); | |
2177 | staticpro (&Qprotected_field); | |
2178 | staticpro (&Qpermanent_local); | |
2179 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2180 | staticpro (&Qoverlayp); |
294d215f RS |
2181 | staticpro (&Qmodification_hooks); |
2182 | Qmodification_hooks = intern ("modification-hooks"); | |
2183 | staticpro (&Qinsert_in_front_hooks); | |
2184 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2185 | staticpro (&Qinsert_behind_hooks); | |
2186 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2187 | staticpro (&Qget_file_buffer); |
2188 | Qget_file_buffer = intern ("get-file-buffer"); | |
52f8ec73 JB |
2189 | |
2190 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2191 | |
2192 | Fput (Qprotected_field, Qerror_conditions, | |
2193 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2194 | Fput (Qprotected_field, Qerror_message, | |
2195 | build_string ("Attempt to modify a protected field")); | |
2196 | ||
188d4d11 RM |
2197 | Fput (intern ("erase-buffer"), Qdisabled, Qt); |
2198 | ||
1ab256cb RM |
2199 | /* All these use DEFVAR_LISP_NOPRO because the slots in |
2200 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2201 | ||
2202 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2203 | &buffer_defaults.mode_line_format, | |
2204 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2205 | This is the same as (default-value 'mode-line-format)."); | |
2206 | ||
2207 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2208 | &buffer_defaults.abbrev_mode, | |
2209 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2210 | This is the same as (default-value 'abbrev-mode)."); | |
2211 | ||
2212 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2213 | &buffer_defaults.ctl_arrow, | |
2214 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2215 | This is the same as (default-value 'ctl-arrow)."); | |
2216 | ||
2217 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2218 | &buffer_defaults.truncate_lines, | |
2219 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2220 | This is the same as (default-value 'truncate-lines)."); | |
2221 | ||
2222 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2223 | &buffer_defaults.fill_column, | |
2224 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2225 | This is the same as (default-value 'fill-column)."); | |
2226 | ||
2227 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2228 | &buffer_defaults.left_margin, | |
2229 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2230 | This is the same as (default-value 'left-margin)."); | |
2231 | ||
2232 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
2233 | &buffer_defaults.tab_width, | |
2234 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
2235 | This is the same as (default-value 'tab-width)."); | |
2236 | ||
2237 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
2238 | &buffer_defaults.case_fold_search, | |
2239 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
2240 | This is the same as (default-value 'case-fold-search)."); | |
2241 | ||
0fa3ba92 JB |
2242 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
2243 | Qnil, 0); | |
1ab256cb RM |
2244 | |
2245 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
2246 | But make-docfile finds it! | |
2247 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 2248 | Qnil, |
1ab256cb RM |
2249 | "Template for displaying mode line for current buffer.\n\ |
2250 | Each buffer has its own value of this variable.\n\ | |
2251 | Value may be a string, a symbol or a list or cons cell.\n\ | |
2252 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
2253 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
2254 | in that the %-constructs below are not recognized.\n\ | |
2255 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
2256 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
2257 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
2258 | For a list whose car is a string or list, each element is processed\n\ | |
2259 | recursively and the results are effectively concatenated.\n\ | |
2260 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
2261 | and padded (if the number is positive) or truncated (if negative)\n\ | |
2262 | to the width specified by that number.\n\ | |
2263 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
2264 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
2265 | or when it is found in a cons-cell or a list)\n\ | |
2266 | %b -- print buffer name. %f -- print visited file name.\n\ | |
2267 | %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\ | |
a97c374a | 2268 | %s -- print process status. %l -- print the current line number.\n\ |
1ab256cb RM |
2269 | %p -- print percent of buffer above top of window, or top, bot or all.\n\ |
2270 | %n -- print Narrow if appropriate.\n\ | |
2271 | %[ -- print one [ for each recursive editing level. %] similar.\n\ | |
2272 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2273 | Decimal digits after the % specify field width to which to pad."); | |
2274 | */ | |
2275 | ||
2276 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2277 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2278 | nil here means use current buffer's major mode."); | |
2279 | ||
2280 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2281 | make_number (Lisp_Symbol), |
1ab256cb RM |
2282 | "Symbol for current buffer's major mode."); |
2283 | ||
2284 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2285 | make_number (Lisp_String), |
1ab256cb RM |
2286 | "Pretty name of current buffer's major mode (a string)."); |
2287 | ||
0fa3ba92 | 2288 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2289 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2290 | Automatically becomes buffer-local when set in any fashion."); | |
2291 | ||
2292 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2293 | Qnil, |
1ab256cb RM |
2294 | "*Non-nil if searches should ignore case.\n\ |
2295 | Automatically becomes buffer-local when set in any fashion."); | |
2296 | ||
2297 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2298 | make_number (Lisp_Int), |
1ab256cb RM |
2299 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2300 | Automatically becomes buffer-local when set in any fashion."); | |
2301 | ||
2302 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2303 | make_number (Lisp_Int), |
1ab256cb RM |
2304 | "*Column for the default indent-line-function to indent to.\n\ |
2305 | Linefeed indents to this column in Fundamental mode.\n\ | |
2306 | Automatically becomes buffer-local when set in any fashion."); | |
2307 | ||
2308 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2309 | make_number (Lisp_Int), |
1ab256cb RM |
2310 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2311 | Automatically becomes buffer-local when set in any fashion."); | |
2312 | ||
0fa3ba92 | 2313 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2314 | "*Non-nil means display control chars with uparrow.\n\ |
2315 | Nil means use backslash and octal digits.\n\ | |
2316 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2317 | This variable does not apply to characters whose display is specified\n\ | |
2318 | in the current display table (if there is one)."); | |
2319 | ||
0fa3ba92 | 2320 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2321 | "*Non-nil means do not display continuation lines;\n\ |
2322 | give each line of text one screen line.\n\ | |
2323 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2324 | \n\ | |
2325 | Note that this is overridden by the variable\n\ | |
2326 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2327 | and this buffer is not full-frame width."); |
1ab256cb RM |
2328 | |
2329 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, | |
0fa3ba92 | 2330 | make_number (Lisp_String), |
1ab256cb RM |
2331 | "Name of default directory of current buffer. Should end with slash.\n\ |
2332 | Each buffer has its own value of this variable."); | |
2333 | ||
2334 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 2335 | Qnil, |
1ab256cb RM |
2336 | "Function called (if non-nil) to perform auto-fill.\n\ |
2337 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
2338 | Each buffer has its own value of this variable.\n\ | |
2339 | NOTE: This variable is not an ordinary hook;\n\ | |
2340 | It may not be a list of functions."); | |
2341 | ||
2342 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 2343 | make_number (Lisp_String), |
1ab256cb RM |
2344 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
2345 | Each buffer has its own value of this variable."); | |
2346 | ||
2347 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 2348 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 2349 | make_number (Lisp_String), |
1ab256cb RM |
2350 | "Name of file for auto-saving current buffer,\n\ |
2351 | or nil if buffer should not be auto-saved.\n\ | |
2352 | Each buffer has its own value of this variable."); | |
2353 | ||
0fa3ba92 | 2354 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
2355 | "Non-nil if this buffer is read-only.\n\ |
2356 | Each buffer has its own value of this variable."); | |
2357 | ||
0fa3ba92 | 2358 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
2359 | "Non-nil if this buffer's file has been backed up.\n\ |
2360 | Backing up is done before the first time the file is saved.\n\ | |
2361 | Each buffer has its own value of this variable."); | |
2362 | ||
2363 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 2364 | make_number (Lisp_Int), |
1ab256cb RM |
2365 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
2366 | 0 initially.\n\ | |
2367 | Each buffer has its own value of this variable."); | |
2368 | ||
2369 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 2370 | Qnil, |
1ab256cb RM |
2371 | "Non-nil enables selective display:\n\ |
2372 | Integer N as value means display only lines\n\ | |
2373 | that start with less than n columns of space.\n\ | |
2374 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
2375 | Then ^M's in the file are written into files as newlines.\n\n\ | |
2376 | Automatically becomes buffer-local when set in any fashion."); | |
2377 | ||
2378 | #ifndef old | |
2379 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
2380 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 2381 | Qnil, |
1ab256cb RM |
2382 | "t means display ... on previous line when a line is invisible.\n\ |
2383 | Automatically becomes buffer-local when set in any fashion."); | |
2384 | #endif | |
2385 | ||
0fa3ba92 | 2386 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 2387 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
2388 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
2389 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 2390 | until the tab is filled in.\n\ |
6bbb0d4a | 2391 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
2392 | Automatically becomes buffer-local when set in any fashion."); |
2393 | ||
54939090 RS |
2394 | #if 0 /* The doc string is too long for some compilers, |
2395 | but make-docfile can find it in this comment. */ | |
1ab256cb | 2396 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 2397 | Qnil, |
1ab256cb RM |
2398 | "Display table that controls display of the contents of current buffer.\n\ |
2399 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2400 | The display table is a vector created with `make-display-table'.\n\ | |
2401 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 2402 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 2403 | nil means display the character in the default fashion.\n\ |
6158b3b0 JB |
2404 | The remaining five elements control the display of\n\ |
2405 | the end of a truncated screen line (element 256, a single character);\n\ | |
2406 | the end of a continued line (element 257, a single character);\n\ | |
2407 | the escape character used to display character codes in octal\n\ | |
2408 | (element 258, a single character);\n\ | |
2409 | the character used as an arrow for control characters (element 259,\n\ | |
2410 | a single character);\n\ | |
2411 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
2412 | a vector of characters).\n\ | |
1ab256cb RM |
2413 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
2414 | Each window can have its own, overriding display table."); | |
54939090 RS |
2415 | #endif |
2416 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
2417 | Qnil, ""); | |
1ab256cb | 2418 | |
1ab256cb RM |
2419 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
2420 | "Don't ask."); | |
2421 | */ | |
01050cb5 | 2422 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
2423 | "Function to call before each text change.\n\ |
2424 | Two arguments are passed to the function: the positions of\n\ | |
2425 | the beginning and end of the range of old text to be changed.\n\ | |
2426 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2427 | No information is given about the length of the text after the change.\n\ | |
2428 | position of the change\n\ | |
2429 | \n\ | |
2430 | While executing the `before-change-function', changes to buffers do not\n\ | |
2431 | cause calls to any `before-change-function' or `after-change-function'."); | |
2432 | Vbefore_change_function = Qnil; | |
2433 | ||
2434 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
2435 | "Function to call after each text change.\n\ | |
2436 | Three arguments are passed to the function: the positions of\n\ | |
2437 | the beginning and end of the range of changed text,\n\ | |
2438 | and the length of the pre-change text replaced by that range.\n\ | |
2439 | \(For an insertion, the pre-change length is zero;\n\ | |
2440 | for a deletion, that length is the number of characters deleted,\n\ | |
2441 | and the post-change beginning and end are at the same place.)\n\ | |
2442 | \n\ | |
2443 | While executing the `after-change-function', changes to buffers do not\n\ | |
2444 | cause calls to any `before-change-function' or `after-change-function'."); | |
2445 | Vafter_change_function = Qnil; | |
2446 | ||
dbc4e1c1 JB |
2447 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
2448 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
2449 | The functions are run using the `run-hooks' function."); | |
2450 | Vfirst_change_hook = Qnil; | |
2451 | Qfirst_change_hook = intern ("first-change-hook"); | |
2452 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 2453 | |
54939090 RS |
2454 | #if 0 /* The doc string is too long for some compilers, |
2455 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 2456 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
2457 | "List of undo entries in current buffer.\n\ |
2458 | Recent changes come first; older changes follow newer.\n\ | |
2459 | \n\ | |
2460 | An entry (START . END) represents an insertion which begins at\n\ | |
2461 | position START and ends at position END.\n\ | |
2462 | \n\ | |
2463 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
2464 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
2465 | of the text being deleted; if negative, point was at the end.\n\ | |
2466 | \n\ | |
2467 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
2468 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
2469 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
2470 | modification count of the most recent save is different, this entry is\n\ | |
2471 | obsolete.\n\ | |
2472 | \n\ | |
483c1fd3 RS |
2473 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
2474 | was modified between BEG and END. PROP is the property name,\n\ | |
2475 | and VAL is the old value.\n\ | |
2476 | \n\ | |
bec44fd6 JB |
2477 | An entry of the form POSITION indicates that point was at the buffer\n\ |
2478 | location given by the integer. Undoing an entry of this form places\n\ | |
2479 | point at POSITION.\n\ | |
2480 | \n\ | |
1ab256cb RM |
2481 | nil marks undo boundaries. The undo command treats the changes\n\ |
2482 | between two undo boundaries as a single step to be undone.\n\ | |
2483 | \n\ | |
bec44fd6 | 2484 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
2485 | #endif |
2486 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
2487 | ""); | |
1ab256cb | 2488 | |
c48f61ef RS |
2489 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
2490 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
2491 | Automatically local in all buffers."); | |
2492 | ||
2493 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, | |
2494 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
2495 | Vtransient_mark_mode = Qnil; | |
2496 | ||
0a4469c9 | 2497 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
2498 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
2499 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
2500 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
2501 | and disregard a `read-only' text property if the property value\n\ | |
2502 | is a member of the list."); | |
2503 | Vinhibit_read_only = Qnil; | |
2504 | ||
1ab256cb RM |
2505 | defsubr (&Sbuffer_list); |
2506 | defsubr (&Sget_buffer); | |
2507 | defsubr (&Sget_file_buffer); | |
2508 | defsubr (&Sget_buffer_create); | |
01050cb5 | 2509 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
2510 | defsubr (&Sbuffer_name); |
2511 | /*defsubr (&Sbuffer_number);*/ | |
2512 | defsubr (&Sbuffer_file_name); | |
2513 | defsubr (&Sbuffer_local_variables); | |
2514 | defsubr (&Sbuffer_modified_p); | |
2515 | defsubr (&Sset_buffer_modified_p); | |
2516 | defsubr (&Sbuffer_modified_tick); | |
2517 | defsubr (&Srename_buffer); | |
2518 | defsubr (&Sother_buffer); | |
2519 | defsubr (&Sbuffer_disable_undo); | |
2520 | defsubr (&Sbuffer_enable_undo); | |
2521 | defsubr (&Skill_buffer); | |
2522 | defsubr (&Serase_buffer); | |
2523 | defsubr (&Sswitch_to_buffer); | |
2524 | defsubr (&Spop_to_buffer); | |
2525 | defsubr (&Scurrent_buffer); | |
2526 | defsubr (&Sset_buffer); | |
2527 | defsubr (&Sbarf_if_buffer_read_only); | |
2528 | defsubr (&Sbury_buffer); | |
2529 | defsubr (&Slist_buffers); | |
2530 | defsubr (&Skill_all_local_variables); | |
2eec3b4e | 2531 | |
52f8ec73 | 2532 | defsubr (&Soverlayp); |
2eec3b4e RS |
2533 | defsubr (&Smake_overlay); |
2534 | defsubr (&Sdelete_overlay); | |
2535 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
2536 | defsubr (&Soverlay_start); |
2537 | defsubr (&Soverlay_end); | |
2538 | defsubr (&Soverlay_buffer); | |
2539 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
2540 | defsubr (&Soverlays_at); |
2541 | defsubr (&Snext_overlay_change); | |
2542 | defsubr (&Soverlay_recenter); | |
2543 | defsubr (&Soverlay_lists); | |
2544 | defsubr (&Soverlay_get); | |
2545 | defsubr (&Soverlay_put); | |
1ab256cb RM |
2546 | } |
2547 | ||
2548 | keys_of_buffer () | |
2549 | { | |
2550 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
2551 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
2552 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
2553 | } |