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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
c922bc55 RM |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992, 1993 |
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 | ||
1ab256cb RM |
31 | #include "config.h" |
32 | #include "lisp.h" | |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
36 | #include "buffer.h" | |
37 | #include "syntax.h" | |
38 | #include "indent.h" | |
d014bf88 | 39 | #include "blockinput.h" |
1ab256cb RM |
40 | |
41 | struct buffer *current_buffer; /* the current buffer */ | |
42 | ||
43 | /* First buffer in chain of all buffers (in reverse order of creation). | |
44 | Threaded through ->next. */ | |
45 | ||
46 | struct buffer *all_buffers; | |
47 | ||
48 | /* This structure holds the default values of the buffer-local variables | |
49 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
50 | The default value occupies the same slot in this structure | |
51 | as an individual buffer's value occupies in that buffer. | |
52 | Setting the default value also goes through the alist of buffers | |
53 | and stores into each buffer that does not say it has a local value. */ | |
54 | ||
55 | struct buffer buffer_defaults; | |
56 | ||
57 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
58 | ||
59 | static Lisp_Object Vbuffer_defaults; | |
60 | ||
61 | /* This structure marks which slots in a buffer have corresponding | |
62 | default values in buffer_defaults. | |
63 | Each such slot has a nonzero value in this structure. | |
64 | The value has only one nonzero bit. | |
65 | ||
66 | When a buffer has its own local value for a slot, | |
67 | the bit for that slot (found in the same slot in this structure) | |
68 | is turned on in the buffer's local_var_flags slot. | |
69 | ||
70 | If a slot in this structure is -1, then even though there may | |
71 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
72 | and the corresponding slot in buffer_defaults is not used. | |
73 | ||
74 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
75 | but there is a default value which is copied into each buffer. | |
76 | ||
77 | If a slot in this structure is negative, then even though there may | |
78 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
79 | and the corresponding slot in buffer_defaults is not used. | |
80 | ||
81 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
82 | zero, that is a bug */ | |
83 | ||
84 | struct buffer buffer_local_flags; | |
85 | ||
86 | /* This structure holds the names of symbols whose values may be | |
87 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
88 | ||
89 | struct buffer buffer_local_symbols; | |
90 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
91 | static Lisp_Object Vbuffer_local_symbols; | |
92 | ||
0fa3ba92 JB |
93 | /* This structure holds the required types for the values in the |
94 | buffer-local slots. If a slot contains Qnil, then the | |
95 | corresponding buffer slot may contain a value of any type. If a | |
96 | slot contains an integer, then prospective values' tags must be | |
97 | equal to that integer. When a tag does not match, the function | |
98 | buffer_slot_type_mismatch will signal an error. */ | |
99 | struct buffer buffer_local_types; | |
100 | ||
1ab256cb | 101 | Lisp_Object Fset_buffer (); |
01050cb5 | 102 | void set_buffer_internal (); |
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 | ||
dbc4e1c1 JB |
115 | /* List of functions to call before changing an unmodified buffer. */ |
116 | Lisp_Object Vfirst_change_hook; | |
117 | Lisp_Object Qfirst_change_hook; | |
1ab256cb RM |
118 | |
119 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
120 | ||
121 | Lisp_Object Qprotected_field; | |
122 | ||
123 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
124 | ||
125 | Lisp_Object Qkill_buffer_hook; | |
126 | ||
127 | /* For debugging; temporary. See set_buffer_internal. */ | |
128 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
129 | ||
130 | nsberror (spec) | |
131 | Lisp_Object spec; | |
132 | { | |
133 | if (XTYPE (spec) == Lisp_String) | |
134 | error ("No buffer named %s", XSTRING (spec)->data); | |
135 | error ("Invalid buffer argument"); | |
136 | } | |
137 | \f | |
138 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
139 | "Return a list of all existing live buffers.") | |
140 | () | |
141 | { | |
142 | return Fmapcar (Qcdr, Vbuffer_alist); | |
143 | } | |
144 | ||
145 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, | |
146 | "Return the buffer named NAME (a string).\n\ | |
147 | If there is no live buffer named NAME, return nil.\n\ | |
148 | NAME may also be a buffer; if so, the value is that buffer.") | |
149 | (name) | |
150 | register Lisp_Object name; | |
151 | { | |
152 | if (XTYPE (name) == Lisp_Buffer) | |
153 | return name; | |
154 | CHECK_STRING (name, 0); | |
155 | ||
156 | return Fcdr (Fassoc (name, Vbuffer_alist)); | |
157 | } | |
158 | ||
159 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
160 | "Return the buffer visiting file FILENAME (a string).\n\ | |
161 | If there is no such live buffer, return nil.") | |
162 | (filename) | |
163 | register Lisp_Object filename; | |
164 | { | |
165 | register Lisp_Object tail, buf, tem; | |
166 | CHECK_STRING (filename, 0); | |
167 | filename = Fexpand_file_name (filename, Qnil); | |
168 | ||
169 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
170 | { | |
171 | buf = Fcdr (XCONS (tail)->car); | |
172 | if (XTYPE (buf) != Lisp_Buffer) continue; | |
173 | if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue; | |
174 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); | |
265a9e55 | 175 | if (!NILP (tem)) |
1ab256cb RM |
176 | return buf; |
177 | } | |
178 | return Qnil; | |
179 | } | |
180 | ||
181 | /* Incremented for each buffer created, to assign the buffer number. */ | |
182 | int buffer_count; | |
183 | ||
184 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
185 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
186 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 187 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
188 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
189 | The value is never nil.") | |
190 | (name) | |
191 | register Lisp_Object name; | |
192 | { | |
193 | register Lisp_Object buf, function, tem; | |
194 | int count = specpdl_ptr - specpdl; | |
195 | register struct buffer *b; | |
196 | ||
197 | buf = Fget_buffer (name); | |
265a9e55 | 198 | if (!NILP (buf)) |
1ab256cb RM |
199 | return buf; |
200 | ||
9ac0d9e0 | 201 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb RM |
202 | |
203 | BUF_GAP_SIZE (b) = 20; | |
9ac0d9e0 | 204 | BLOCK_INPUT; |
1ab256cb | 205 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 206 | UNBLOCK_INPUT; |
1ab256cb RM |
207 | if (! BUF_BEG_ADDR (b)) |
208 | memory_full (); | |
209 | ||
210 | BUF_PT (b) = 1; | |
211 | BUF_GPT (b) = 1; | |
212 | BUF_BEGV (b) = 1; | |
213 | BUF_ZV (b) = 1; | |
214 | BUF_Z (b) = 1; | |
215 | BUF_MODIFF (b) = 1; | |
216 | ||
217 | /* Put this on the chain of all buffers including killed ones. */ | |
218 | b->next = all_buffers; | |
219 | all_buffers = b; | |
220 | ||
221 | b->mark = Fmake_marker (); | |
222 | /*b->number = make_number (++buffer_count);*/ | |
223 | b->name = name; | |
224 | if (XSTRING (name)->data[0] != ' ') | |
225 | b->undo_list = Qnil; | |
226 | else | |
227 | b->undo_list = Qt; | |
228 | ||
229 | reset_buffer (b); | |
230 | ||
231 | /* Put this in the alist of all live buffers. */ | |
232 | XSET (buf, Lisp_Buffer, b); | |
233 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
234 | ||
235 | b->mark = Fmake_marker (); | |
236 | b->markers = Qnil; | |
237 | b->name = name; | |
238 | ||
239 | function = buffer_defaults.major_mode; | |
265a9e55 | 240 | if (NILP (function)) |
1ab256cb RM |
241 | { |
242 | tem = Fget (current_buffer->major_mode, Qmode_class); | |
243 | if (EQ (tem, Qnil)) | |
244 | function = current_buffer->major_mode; | |
245 | } | |
246 | ||
265a9e55 | 247 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1ab256cb RM |
248 | return buf; |
249 | ||
250 | /* To select a nonfundamental mode, | |
251 | select the buffer temporarily and then call the mode function. */ | |
252 | ||
253 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
254 | ||
255 | Fset_buffer (buf); | |
256 | call0 (function); | |
257 | ||
258 | return unbind_to (count, buf); | |
259 | } | |
260 | ||
261 | /* Reinitialize everything about a buffer except its name and contents. */ | |
262 | ||
263 | void | |
264 | reset_buffer (b) | |
265 | register struct buffer *b; | |
266 | { | |
267 | b->filename = Qnil; | |
268 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; | |
269 | b->modtime = 0; | |
270 | b->save_modified = 1; | |
291026b5 | 271 | XFASTINT (b->save_length) = 0; |
1ab256cb RM |
272 | b->last_window_start = 1; |
273 | b->backed_up = Qnil; | |
274 | b->auto_save_modified = 0; | |
275 | b->auto_save_file_name = Qnil; | |
276 | b->read_only = Qnil; | |
2eec3b4e RS |
277 | b->overlays_before = Qnil; |
278 | b->overlays_after = Qnil; | |
279 | XFASTINT (b->overlay_center) = 1; | |
33f7013e JA |
280 | |
281 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
282 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
283 | ||
1ab256cb RM |
284 | reset_buffer_local_variables(b); |
285 | } | |
286 | ||
c48f61ef | 287 | reset_buffer_local_variables (b) |
1ab256cb RM |
288 | register struct buffer *b; |
289 | { | |
290 | register int offset; | |
291 | ||
292 | /* Reset the major mode to Fundamental, together with all the | |
293 | things that depend on the major mode. | |
294 | default-major-mode is handled at a higher level. | |
295 | We ignore it here. */ | |
296 | b->major_mode = Qfundamental_mode; | |
297 | b->keymap = Qnil; | |
298 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
299 | b->mode_name = QSFundamental; | |
300 | b->minor_modes = Qnil; | |
301 | b->downcase_table = Vascii_downcase_table; | |
302 | b->upcase_table = Vascii_upcase_table; | |
303 | b->case_canon_table = Vascii_downcase_table; | |
304 | b->case_eqv_table = Vascii_upcase_table; | |
c48f61ef | 305 | b->mark_active = Qnil; |
1ab256cb RM |
306 | #if 0 |
307 | b->sort_table = XSTRING (Vascii_sort_table); | |
308 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
309 | #endif /* 0 */ | |
310 | ||
311 | /* Reset all per-buffer variables to their defaults. */ | |
312 | b->local_var_alist = Qnil; | |
313 | b->local_var_flags = 0; | |
314 | ||
315 | /* For each slot that has a default value, | |
316 | copy that into the slot. */ | |
317 | ||
318 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
319 | offset < sizeof (struct buffer); | |
320 | offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */ | |
321 | if (*(int *)(offset + (char *) &buffer_local_flags) > 0 | |
322 | || *(int *)(offset + (char *) &buffer_local_flags) == -2) | |
323 | *(Lisp_Object *)(offset + (char *)b) = | |
324 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
325 | } | |
326 | ||
01050cb5 RM |
327 | /* We split this away from generate-new-buffer, because rename-buffer |
328 | and set-visited-file-name ought to be able to use this to really | |
329 | rename the buffer properly. */ | |
330 | ||
331 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
1ab256cb | 332 | 1, 1, 0, |
01050cb5 RM |
333 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
334 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 335 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
01050cb5 | 336 | until an unused name is found, and then return that name.") |
1ab256cb RM |
337 | (name) |
338 | register Lisp_Object name; | |
339 | { | |
340 | register Lisp_Object gentemp, tem; | |
341 | int count; | |
342 | char number[10]; | |
343 | ||
344 | CHECK_STRING (name, 0); | |
345 | ||
346 | tem = Fget_buffer (name); | |
265a9e55 | 347 | if (NILP (tem)) |
01050cb5 | 348 | return name; |
1ab256cb RM |
349 | |
350 | count = 1; | |
351 | while (1) | |
352 | { | |
353 | sprintf (number, "<%d>", ++count); | |
354 | gentemp = concat2 (name, build_string (number)); | |
355 | tem = Fget_buffer (gentemp); | |
265a9e55 | 356 | if (NILP (tem)) |
01050cb5 | 357 | return gentemp; |
1ab256cb RM |
358 | } |
359 | } | |
360 | ||
361 | \f | |
362 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
363 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 364 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
365 | (buffer) |
366 | register Lisp_Object buffer; | |
367 | { | |
265a9e55 | 368 | if (NILP (buffer)) |
1ab256cb RM |
369 | return current_buffer->name; |
370 | CHECK_BUFFER (buffer, 0); | |
371 | return XBUFFER (buffer)->name; | |
372 | } | |
373 | ||
374 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
375 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
376 | No argument or nil as argument means use the current buffer.") | |
377 | (buffer) | |
378 | register Lisp_Object buffer; | |
379 | { | |
265a9e55 | 380 | if (NILP (buffer)) |
1ab256cb RM |
381 | return current_buffer->filename; |
382 | CHECK_BUFFER (buffer, 0); | |
383 | return XBUFFER (buffer)->filename; | |
384 | } | |
385 | ||
386 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, | |
387 | Sbuffer_local_variables, 0, 1, 0, | |
388 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
389 | Each element looks like (SYMBOL . VALUE) and describes one variable.\n\ | |
390 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ | |
391 | No argument or nil as argument means use current buffer as BUFFER.") | |
392 | (buffer) | |
393 | register Lisp_Object buffer; | |
394 | { | |
395 | register struct buffer *buf; | |
396 | register Lisp_Object val; | |
397 | ||
265a9e55 | 398 | if (NILP (buffer)) |
1ab256cb RM |
399 | buf = current_buffer; |
400 | else | |
401 | { | |
402 | CHECK_BUFFER (buffer, 0); | |
403 | buf = XBUFFER (buffer); | |
404 | } | |
405 | ||
406 | { | |
407 | /* Reference each variable in the alist in our current buffer. | |
408 | If inquiring about the current buffer, this gets the current values, | |
409 | so store them into the alist so the alist is up to date. | |
410 | If inquiring about some other buffer, this swaps out any values | |
411 | for that buffer, making the alist up to date automatically. */ | |
412 | register Lisp_Object tem; | |
413 | for (tem = buf->local_var_alist; CONSP (tem); tem = XCONS (tem)->cdr) | |
414 | { | |
415 | Lisp_Object v1 = Fsymbol_value (XCONS (XCONS (tem)->car)->car); | |
416 | if (buf == current_buffer) | |
417 | XCONS (XCONS (tem)->car)->cdr = v1; | |
418 | } | |
419 | } | |
420 | ||
421 | /* Make a copy of the alist, to return it. */ | |
422 | val = Fcopy_alist (buf->local_var_alist); | |
423 | ||
424 | /* Add on all the variables stored in special slots. */ | |
425 | { | |
426 | register int offset, mask; | |
427 | ||
428 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
429 | offset < sizeof (struct buffer); | |
430 | offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */ | |
431 | { | |
432 | mask = *(int *)(offset + (char *) &buffer_local_flags); | |
433 | if (mask == -1 || (buf->local_var_flags & mask)) | |
434 | if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) | |
435 | == Lisp_Symbol) | |
436 | val = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols), | |
437 | *(Lisp_Object *)(offset + (char *)buf)), | |
438 | val); | |
439 | } | |
440 | } | |
441 | return (val); | |
442 | } | |
443 | ||
444 | \f | |
445 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
446 | 0, 1, 0, | |
447 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
448 | No argument or nil as argument means use current buffer as BUFFER.") | |
449 | (buffer) | |
450 | register Lisp_Object buffer; | |
451 | { | |
452 | register struct buffer *buf; | |
265a9e55 | 453 | if (NILP (buffer)) |
1ab256cb RM |
454 | buf = current_buffer; |
455 | else | |
456 | { | |
457 | CHECK_BUFFER (buffer, 0); | |
458 | buf = XBUFFER (buffer); | |
459 | } | |
460 | ||
461 | return buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil; | |
462 | } | |
463 | ||
464 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
465 | 1, 1, 0, | |
466 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
467 | A non-nil FLAG means mark the buffer modified.") | |
468 | (flag) | |
469 | register Lisp_Object flag; | |
470 | { | |
471 | register int already; | |
472 | register Lisp_Object fn; | |
473 | ||
474 | #ifdef CLASH_DETECTION | |
475 | /* If buffer becoming modified, lock the file. | |
476 | If buffer becoming unmodified, unlock the file. */ | |
477 | ||
478 | fn = current_buffer->filename; | |
265a9e55 | 479 | if (!NILP (fn)) |
1ab256cb RM |
480 | { |
481 | already = current_buffer->save_modified < MODIFF; | |
265a9e55 | 482 | if (!already && !NILP (flag)) |
1ab256cb | 483 | lock_file (fn); |
265a9e55 | 484 | else if (already && NILP (flag)) |
1ab256cb RM |
485 | unlock_file (fn); |
486 | } | |
487 | #endif /* CLASH_DETECTION */ | |
488 | ||
265a9e55 | 489 | current_buffer->save_modified = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
490 | update_mode_lines++; |
491 | return flag; | |
492 | } | |
493 | ||
494 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
495 | 0, 1, 0, | |
496 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
497 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
498 | that buffer is changed. It wraps around occasionally.\n\ | |
499 | No argument or nil as argument means use current buffer as BUFFER.") | |
500 | (buffer) | |
501 | register Lisp_Object buffer; | |
502 | { | |
503 | register struct buffer *buf; | |
265a9e55 | 504 | if (NILP (buffer)) |
1ab256cb RM |
505 | buf = current_buffer; |
506 | else | |
507 | { | |
508 | CHECK_BUFFER (buffer, 0); | |
509 | buf = XBUFFER (buffer); | |
510 | } | |
511 | ||
512 | return make_number (BUF_MODIFF (buf)); | |
513 | } | |
514 | \f | |
01050cb5 | 515 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
3bd779aa | 516 | "sRename buffer (to new name): \nP", |
1ab256cb | 517 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 518 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 519 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 520 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 521 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
522 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
523 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 524 | This does not change the name of the visited file (if any).") |
3bd779aa RS |
525 | (name, unique) |
526 | register Lisp_Object name, unique; | |
1ab256cb RM |
527 | { |
528 | register Lisp_Object tem, buf; | |
529 | ||
530 | CHECK_STRING (name, 0); | |
531 | tem = Fget_buffer (name); | |
01050cb5 RM |
532 | if (XBUFFER (tem) == current_buffer) |
533 | return current_buffer->name; | |
265a9e55 | 534 | if (!NILP (tem)) |
01050cb5 | 535 | { |
3bd779aa | 536 | if (!NILP (unique)) |
01050cb5 RM |
537 | name = Fgenerate_new_buffer_name (name); |
538 | else | |
539 | error ("Buffer name \"%s\" is in use", XSTRING (name)->data); | |
540 | } | |
1ab256cb RM |
541 | |
542 | current_buffer->name = name; | |
76f590d7 JB |
543 | |
544 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
545 | any windows displaying current_buffer will stay unchanged. */ | |
546 | update_mode_lines++; | |
547 | ||
1ab256cb RM |
548 | XSET (buf, Lisp_Buffer, current_buffer); |
549 | Fsetcar (Frassq (buf, Vbuffer_alist), name); | |
265a9e55 | 550 | if (NILP (current_buffer->filename) && !NILP (current_buffer->auto_save_file_name)) |
1ab256cb | 551 | call0 (intern ("rename-auto-save-file")); |
01050cb5 | 552 | return name; |
1ab256cb RM |
553 | } |
554 | ||
a0ebb746 | 555 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 556 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
557 | Buffers not visible in windows are preferred to visible buffers,\n\ |
558 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
559 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
560 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
561 | (buffer, visible_ok) |
562 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
563 | { |
564 | register Lisp_Object tail, buf, notsogood, tem; | |
565 | notsogood = Qnil; | |
566 | ||
265a9e55 | 567 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
568 | { |
569 | buf = Fcdr (Fcar (tail)); | |
570 | if (EQ (buf, buffer)) | |
571 | continue; | |
572 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
573 | continue; | |
a0ebb746 JB |
574 | if (NILP (visible_ok)) |
575 | tem = Fget_buffer_window (buf, Qnil); | |
576 | else | |
577 | tem = Qnil; | |
265a9e55 | 578 | if (NILP (tem)) |
1ab256cb | 579 | return buf; |
265a9e55 | 580 | if (NILP (notsogood)) |
1ab256cb RM |
581 | notsogood = buf; |
582 | } | |
265a9e55 | 583 | if (!NILP (notsogood)) |
1ab256cb RM |
584 | return notsogood; |
585 | return Fget_buffer_create (build_string ("*scratch*")); | |
586 | } | |
587 | \f | |
588 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 1,1, | |
589 | 0, | |
590 | "Make BUFFER stop keeping undo information.") | |
ffd56f97 JB |
591 | (buffer) |
592 | register Lisp_Object buffer; | |
1ab256cb | 593 | { |
ffd56f97 JB |
594 | Lisp_Object real_buffer; |
595 | ||
596 | if (NILP (buffer)) | |
597 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
598 | else | |
599 | { | |
600 | real_buffer = Fget_buffer (buffer); | |
601 | if (NILP (real_buffer)) | |
602 | nsberror (buffer); | |
603 | } | |
604 | ||
605 | XBUFFER (real_buffer)->undo_list = Qt; | |
606 | ||
1ab256cb RM |
607 | return Qnil; |
608 | } | |
609 | ||
610 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
611 | 0, 1, "", | |
612 | "Start keeping undo information for buffer BUFFER.\n\ | |
613 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
614 | (buffer) |
615 | register Lisp_Object buffer; | |
1ab256cb | 616 | { |
ffd56f97 | 617 | Lisp_Object real_buffer; |
1ab256cb | 618 | |
ffd56f97 JB |
619 | if (NILP (buffer)) |
620 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
1ab256cb RM |
621 | else |
622 | { | |
ffd56f97 JB |
623 | real_buffer = Fget_buffer (buffer); |
624 | if (NILP (real_buffer)) | |
625 | nsberror (buffer); | |
1ab256cb RM |
626 | } |
627 | ||
ffd56f97 JB |
628 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
629 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
630 | |
631 | return Qnil; | |
632 | } | |
633 | ||
634 | /* | |
635 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
636 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
637 | The buffer being killed will be current while the hook is running.\n\ | |
638 | See `kill-buffer'." | |
639 | */ | |
640 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
641 | "Kill the buffer BUFFER.\n\ | |
642 | The argument may be a buffer or may be the name of a buffer.\n\ | |
643 | An argument of nil means kill the current buffer.\n\n\ | |
644 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
645 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
646 | if not void, is a list of functions to be called, with no arguments,\n\ | |
647 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
648 | when the hook functions are called.\n\n\ | |
649 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
650 | with `delete-process'.") | |
651 | (bufname) | |
652 | Lisp_Object bufname; | |
653 | { | |
654 | Lisp_Object buf; | |
655 | register struct buffer *b; | |
656 | register Lisp_Object tem; | |
657 | register struct Lisp_Marker *m; | |
658 | struct gcpro gcpro1, gcpro2; | |
659 | ||
265a9e55 | 660 | if (NILP (bufname)) |
1ab256cb RM |
661 | buf = Fcurrent_buffer (); |
662 | else | |
663 | buf = Fget_buffer (bufname); | |
265a9e55 | 664 | if (NILP (buf)) |
1ab256cb RM |
665 | nsberror (bufname); |
666 | ||
667 | b = XBUFFER (buf); | |
668 | ||
669 | /* Query if the buffer is still modified. */ | |
265a9e55 | 670 | if (INTERACTIVE && !NILP (b->filename) |
1ab256cb RM |
671 | && BUF_MODIFF (b) > b->save_modified) |
672 | { | |
673 | GCPRO2 (buf, bufname); | |
674 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
675 | XSTRING (b->name)->data)); | |
676 | UNGCPRO; | |
265a9e55 | 677 | if (NILP (tem)) |
1ab256cb RM |
678 | return Qnil; |
679 | } | |
680 | ||
681 | /* Run kill-buffer hook with the buffer to be killed the current buffer. */ | |
682 | { | |
683 | register Lisp_Object val; | |
684 | int count = specpdl_ptr - specpdl; | |
685 | ||
686 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
687 | set_buffer_internal (b); | |
688 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
689 | unbind_to (count, Qnil); | |
690 | } | |
691 | ||
692 | /* We have no more questions to ask. Verify that it is valid | |
693 | to kill the buffer. This must be done after the questions | |
694 | since anything can happen within do_yes_or_no_p. */ | |
695 | ||
696 | /* Don't kill the minibuffer now current. */ | |
697 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
698 | return Qnil; | |
699 | ||
265a9e55 | 700 | if (NILP (b->name)) |
1ab256cb RM |
701 | return Qnil; |
702 | ||
703 | /* Make this buffer not be current. | |
704 | In the process, notice if this is the sole visible buffer | |
705 | and give up if so. */ | |
706 | if (b == current_buffer) | |
707 | { | |
172a9c1f | 708 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
709 | Fset_buffer (tem); |
710 | if (b == current_buffer) | |
711 | return Qnil; | |
712 | } | |
713 | ||
714 | /* Now there is no question: we can kill the buffer. */ | |
715 | ||
716 | #ifdef CLASH_DETECTION | |
717 | /* Unlock this buffer's file, if it is locked. */ | |
718 | unlock_buffer (b); | |
719 | #endif /* CLASH_DETECTION */ | |
720 | ||
1ab256cb | 721 | kill_buffer_processes (buf); |
1ab256cb RM |
722 | |
723 | tem = Vinhibit_quit; | |
724 | Vinhibit_quit = Qt; | |
725 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
726 | Freplace_buffer_in_windows (buf); | |
727 | Vinhibit_quit = tem; | |
728 | ||
729 | /* Delete any auto-save file. */ | |
730 | if (XTYPE (b->auto_save_file_name) == Lisp_String) | |
731 | { | |
732 | Lisp_Object tem; | |
733 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 734 | if (! NILP (tem)) |
1ab256cb RM |
735 | unlink (XSTRING (b->auto_save_file_name)->data); |
736 | } | |
737 | ||
738 | /* Unchain all markers of this buffer | |
739 | and leave them pointing nowhere. */ | |
740 | for (tem = b->markers; !EQ (tem, Qnil); ) | |
741 | { | |
742 | m = XMARKER (tem); | |
743 | m->buffer = 0; | |
744 | tem = m->chain; | |
745 | m->chain = Qnil; | |
746 | } | |
747 | b->markers = Qnil; | |
748 | ||
33f7013e JA |
749 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
750 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
751 | /* Perhaps we should explicitly free the interval tree here... */ | |
752 | ||
1ab256cb | 753 | b->name = Qnil; |
9ac0d9e0 | 754 | BLOCK_INPUT; |
1ab256cb | 755 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
9ac0d9e0 | 756 | UNBLOCK_INPUT; |
1ab256cb RM |
757 | b->undo_list = Qnil; |
758 | ||
759 | return Qt; | |
760 | } | |
761 | \f | |
36a8c287 JB |
762 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
763 | we do this each time BUF is selected visibly, the more recently | |
764 | selected buffers are always closer to the front of the list. This | |
765 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
766 | |
767 | record_buffer (buf) | |
768 | Lisp_Object buf; | |
769 | { | |
770 | register Lisp_Object link, prev; | |
771 | ||
772 | prev = Qnil; | |
773 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
774 | { | |
775 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
776 | break; | |
777 | prev = link; | |
778 | } | |
779 | ||
36a8c287 JB |
780 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
781 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 782 | |
265a9e55 | 783 | if (NILP (prev)) |
1ab256cb RM |
784 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
785 | else | |
786 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
787 | ||
788 | XCONS(link)->cdr = Vbuffer_alist; | |
789 | Vbuffer_alist = link; | |
790 | } | |
791 | ||
792 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", | |
793 | "Select buffer BUFFER in the current window.\n\ | |
794 | BUFFER may be a buffer or a buffer name.\n\ | |
795 | Optional second arg NORECORD non-nil means\n\ | |
796 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
797 | \n\ | |
798 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
799 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
800 | the window-buffer correspondences.") | |
801 | (bufname, norecord) | |
802 | Lisp_Object bufname, norecord; | |
803 | { | |
804 | register Lisp_Object buf; | |
805 | Lisp_Object tem; | |
806 | ||
807 | if (EQ (minibuf_window, selected_window)) | |
808 | error ("Cannot switch buffers in minibuffer window"); | |
809 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 810 | if (!NILP (tem)) |
1ab256cb RM |
811 | error ("Cannot switch buffers in a dedicated window"); |
812 | ||
265a9e55 | 813 | if (NILP (bufname)) |
172a9c1f | 814 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
815 | else |
816 | buf = Fget_buffer_create (bufname); | |
817 | Fset_buffer (buf); | |
265a9e55 | 818 | if (NILP (norecord)) |
1ab256cb RM |
819 | record_buffer (buf); |
820 | ||
821 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
822 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
823 | : selected_window, | |
1ab256cb RM |
824 | buf); |
825 | ||
826 | return Qnil; | |
827 | } | |
828 | ||
829 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
830 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
831 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
832 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
833 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
834 | window even if BUFFER is already visible in the selected window.") | |
835 | (bufname, other) | |
836 | Lisp_Object bufname, other; | |
837 | { | |
838 | register Lisp_Object buf; | |
265a9e55 | 839 | if (NILP (bufname)) |
172a9c1f | 840 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
841 | else |
842 | buf = Fget_buffer_create (bufname); | |
843 | Fset_buffer (buf); | |
844 | record_buffer (buf); | |
845 | Fselect_window (Fdisplay_buffer (buf, other)); | |
846 | return Qnil; | |
847 | } | |
848 | ||
849 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
850 | "Return the current buffer as a Lisp object.") | |
851 | () | |
852 | { | |
853 | register Lisp_Object buf; | |
854 | XSET (buf, Lisp_Buffer, current_buffer); | |
855 | return buf; | |
856 | } | |
857 | \f | |
858 | /* Set the current buffer to b */ | |
859 | ||
860 | void | |
861 | set_buffer_internal (b) | |
862 | register struct buffer *b; | |
863 | { | |
864 | register struct buffer *old_buf; | |
865 | register Lisp_Object tail, valcontents; | |
866 | enum Lisp_Type tem; | |
867 | ||
868 | if (current_buffer == b) | |
869 | return; | |
870 | ||
871 | windows_or_buffers_changed = 1; | |
872 | old_buf = current_buffer; | |
873 | current_buffer = b; | |
874 | last_known_column_point = -1; /* invalidate indentation cache */ | |
875 | ||
876 | /* Look down buffer's list of local Lisp variables | |
877 | to find and update any that forward into C variables. */ | |
878 | ||
265a9e55 | 879 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
880 | { |
881 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
882 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
883 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
884 | && (tem = XTYPE (XCONS (valcontents)->car), | |
885 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
886 | || tem == Lisp_Objfwd))) | |
887 | /* Just reference the variable | |
888 | to cause it to become set for this buffer. */ | |
889 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
890 | } | |
891 | ||
892 | /* Do the same with any others that were local to the previous buffer */ | |
893 | ||
894 | if (old_buf) | |
265a9e55 | 895 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
896 | { |
897 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
898 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
899 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
900 | && (tem = XTYPE (XCONS (valcontents)->car), | |
901 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
902 | || tem == Lisp_Objfwd))) | |
903 | /* Just reference the variable | |
904 | to cause it to become set for this buffer. */ | |
905 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
906 | } | |
907 | } | |
908 | ||
909 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, | |
910 | "Make the buffer BUFFER current for editing operations.\n\ | |
911 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
912 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
913 | This function does not display the buffer, so its effect ends\n\ | |
914 | when the current command terminates.\n\ | |
915 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
916 | (bufname) | |
917 | register Lisp_Object bufname; | |
918 | { | |
919 | register Lisp_Object buffer; | |
920 | buffer = Fget_buffer (bufname); | |
265a9e55 | 921 | if (NILP (buffer)) |
1ab256cb | 922 | nsberror (bufname); |
265a9e55 | 923 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
924 | error ("Selecting deleted buffer"); |
925 | set_buffer_internal (XBUFFER (buffer)); | |
926 | return buffer; | |
927 | } | |
928 | \f | |
929 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
930 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
931 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
932 | () | |
933 | { | |
265a9e55 | 934 | while (!NILP (current_buffer->read_only)) |
1ab256cb RM |
935 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
936 | return Qnil; | |
937 | } | |
938 | ||
939 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
940 | "Put BUFFER at the end of the list of all buffers.\n\ | |
941 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 942 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
943 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
944 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
945 | selected window if it is displayed there.") | |
1ab256cb RM |
946 | (buf) |
947 | register Lisp_Object buf; | |
948 | { | |
b271272a | 949 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 950 | if (NILP (buf)) |
a5611885 JB |
951 | { |
952 | XSET (buf, Lisp_Buffer, current_buffer); | |
953 | ||
954 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 955 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 956 | } |
1ab256cb RM |
957 | else |
958 | { | |
959 | Lisp_Object buf1; | |
960 | ||
961 | buf1 = Fget_buffer (buf); | |
265a9e55 | 962 | if (NILP (buf1)) |
1ab256cb RM |
963 | nsberror (buf); |
964 | buf = buf1; | |
b271272a JB |
965 | } |
966 | ||
a5611885 | 967 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
968 | { |
969 | register Lisp_Object aelt, link; | |
970 | ||
971 | aelt = Frassq (buf, Vbuffer_alist); | |
972 | link = Fmemq (aelt, Vbuffer_alist); | |
973 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
974 | XCONS (link)->cdr = Qnil; | |
975 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
976 | } | |
1ab256cb | 977 | |
1ab256cb RM |
978 | return Qnil; |
979 | } | |
980 | \f | |
c922bc55 | 981 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 982 | "Delete the entire contents of the current buffer.\n\ |
a5611885 | 983 | Any clipping restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
984 | so the buffer is truly empty after this.") |
985 | () | |
986 | { | |
987 | Fwiden (); | |
988 | del_range (BEG, Z); | |
989 | current_buffer->last_window_start = 1; | |
990 | /* Prevent warnings, or suspension of auto saving, that would happen | |
991 | if future size is less than past size. Use of erase-buffer | |
992 | implies that the future text is not really related to the past text. */ | |
993 | XFASTINT (current_buffer->save_length) = 0; | |
994 | return Qnil; | |
995 | } | |
996 | ||
997 | validate_region (b, e) | |
998 | register Lisp_Object *b, *e; | |
999 | { | |
1000 | register int i; | |
1001 | ||
1002 | CHECK_NUMBER_COERCE_MARKER (*b, 0); | |
1003 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1004 | ||
1005 | if (XINT (*b) > XINT (*e)) | |
1006 | { | |
1007 | i = XFASTINT (*b); /* This is legit even if *b is < 0 */ | |
1008 | *b = *e; | |
1009 | XFASTINT (*e) = i; /* because this is all we do with i. */ | |
1010 | } | |
1011 | ||
1012 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1013 | && XINT (*e) <= ZV)) | |
1014 | args_out_of_range (*b, *e); | |
1015 | } | |
1016 | \f | |
1017 | Lisp_Object | |
1018 | list_buffers_1 (files) | |
1019 | Lisp_Object files; | |
1020 | { | |
1021 | register Lisp_Object tail, tem, buf; | |
1022 | Lisp_Object col1, col2, col3, minspace; | |
1023 | register struct buffer *old = current_buffer, *b; | |
1024 | int desired_point = 0; | |
1025 | Lisp_Object other_file_symbol; | |
1026 | ||
1027 | other_file_symbol = intern ("list-buffers-directory"); | |
1028 | ||
1029 | XFASTINT (col1) = 19; | |
1030 | XFASTINT (col2) = 25; | |
1031 | XFASTINT (col3) = 40; | |
1032 | XFASTINT (minspace) = 1; | |
1033 | ||
1034 | Fset_buffer (Vstandard_output); | |
1035 | ||
1036 | tail = intern ("Buffer-menu-mode"); | |
1037 | if (!EQ (tail, current_buffer->major_mode) | |
265a9e55 | 1038 | && (tem = Ffboundp (tail), !NILP (tem))) |
1ab256cb RM |
1039 | call0 (tail); |
1040 | Fbuffer_disable_undo (Vstandard_output); | |
1041 | current_buffer->read_only = Qnil; | |
1042 | ||
1043 | write_string ("\ | |
1044 | MR Buffer Size Mode File\n\ | |
1045 | -- ------ ---- ---- ----\n", -1); | |
1046 | ||
265a9e55 | 1047 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
1048 | { |
1049 | buf = Fcdr (Fcar (tail)); | |
1050 | b = XBUFFER (buf); | |
1051 | /* Don't mention the minibuffers. */ | |
1052 | if (XSTRING (b->name)->data[0] == ' ') | |
1053 | continue; | |
1054 | /* Optionally don't mention buffers that lack files. */ | |
265a9e55 | 1055 | if (!NILP (files) && NILP (b->filename)) |
1ab256cb RM |
1056 | continue; |
1057 | /* Identify the current buffer. */ | |
1058 | if (b == old) | |
1059 | desired_point = point; | |
1060 | write_string (b == old ? "." : " ", -1); | |
1061 | /* Identify modified buffers */ | |
1062 | write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1); | |
265a9e55 | 1063 | write_string (NILP (b->read_only) ? " " : "% ", -1); |
1ab256cb RM |
1064 | Fprinc (b->name, Qnil); |
1065 | Findent_to (col1, make_number (2)); | |
1066 | XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b); | |
1067 | Fprin1 (tem, Qnil); | |
1068 | Findent_to (col2, minspace); | |
1069 | Fprinc (b->mode_name, Qnil); | |
1070 | Findent_to (col3, minspace); | |
1071 | ||
265a9e55 | 1072 | if (!NILP (b->filename)) |
1ab256cb RM |
1073 | Fprinc (b->filename, Qnil); |
1074 | else | |
1075 | { | |
1076 | /* No visited file; check local value of list-buffers-directory. */ | |
1077 | Lisp_Object tem; | |
1078 | set_buffer_internal (b); | |
1079 | tem = Fboundp (other_file_symbol); | |
265a9e55 | 1080 | if (!NILP (tem)) |
1ab256cb RM |
1081 | { |
1082 | tem = Fsymbol_value (other_file_symbol); | |
1083 | Fset_buffer (Vstandard_output); | |
1084 | if (XTYPE (tem) == Lisp_String) | |
1085 | Fprinc (tem, Qnil); | |
1086 | } | |
1087 | else | |
1088 | Fset_buffer (Vstandard_output); | |
1089 | } | |
1090 | write_string ("\n", -1); | |
1091 | } | |
1092 | ||
1093 | current_buffer->read_only = Qt; | |
1094 | set_buffer_internal (old); | |
1095 | /* Foo. This doesn't work since temp_output_buffer_show sets point to 1 | |
1096 | if (desired_point) | |
1097 | XBUFFER (Vstandard_output)->text.pointloc = desired_point; | |
1098 | */ | |
1099 | return Qnil; | |
1100 | } | |
1101 | ||
1102 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", | |
1103 | "Display a list of names of existing buffers.\n\ | |
1104 | The list is displayed in a buffer named `*Buffer List*'.\n\ | |
1105 | Note that buffers with names starting with spaces are omitted.\n\ | |
1106 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ | |
1107 | \n\ | |
1108 | The M column contains a * for buffers that are modified.\n\ | |
1109 | The R column contains a % for buffers that are read-only.") | |
1110 | (files) | |
1111 | Lisp_Object files; | |
1112 | { | |
1113 | internal_with_output_to_temp_buffer ("*Buffer List*", | |
1114 | list_buffers_1, files); | |
1115 | return Qnil; | |
1116 | } | |
1117 | ||
1118 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, | |
1119 | 0, 0, 0, | |
1120 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1121 | Most local variable bindings are eliminated so that the default values\n\ | |
1122 | become effective once more. Also, the syntax table is set from\n\ | |
1123 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1124 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1125 | This function also forces redisplay of the mode line.\n\ | |
1126 | \n\ | |
1127 | Every function to select a new major mode starts by\n\ | |
1128 | calling this function.\n\n\ | |
1129 | As a special exception, local variables whose names have\n\ | |
1130 | a non-nil `permanent-local' property are not eliminated by this function.") | |
1131 | () | |
1132 | { | |
1133 | register Lisp_Object alist, sym, tem; | |
1134 | Lisp_Object oalist; | |
1135 | oalist = current_buffer->local_var_alist; | |
1136 | ||
1137 | /* Make sure no local variables remain set up with this buffer | |
1138 | for their current values. */ | |
1139 | ||
265a9e55 | 1140 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1141 | { |
1142 | sym = XCONS (XCONS (alist)->car)->car; | |
1143 | ||
1144 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1145 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car; | |
1146 | if (XBUFFER (tem) == current_buffer) | |
1147 | { | |
1148 | /* Symbol is set up for this buffer's old local value. | |
1149 | Set it up for the current buffer with the default value. */ | |
1150 | ||
1151 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr; | |
542143d7 RS |
1152 | /* Store the symbol's current value into the alist entry |
1153 | it is currently set up for. This is so that, if the | |
1154 | local is marked permanent, and we make it local again below, | |
1155 | we don't lose the value. */ | |
1156 | XCONS (XCONS (tem)->car)->cdr = XCONS (XSYMBOL (sym)->value)->car; | |
1157 | /* Switch to the symbol's default-value alist entry. */ | |
1ab256cb | 1158 | XCONS (tem)->car = tem; |
542143d7 | 1159 | /* Mark it as current for the current buffer. */ |
1ab256cb | 1160 | XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer (); |
542143d7 | 1161 | /* Store the current value into any forwarding in the symbol. */ |
1ab256cb RM |
1162 | store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car, |
1163 | XCONS (tem)->cdr); | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* Actually eliminate all local bindings of this buffer. */ | |
1168 | ||
1169 | reset_buffer_local_variables (current_buffer); | |
1170 | ||
1171 | /* Redisplay mode lines; we are changing major mode. */ | |
1172 | ||
1173 | update_mode_lines++; | |
1174 | ||
1175 | /* Any which are supposed to be permanent, | |
1176 | make local again, with the same values they had. */ | |
1177 | ||
265a9e55 | 1178 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1179 | { |
1180 | sym = XCONS (XCONS (alist)->car)->car; | |
1181 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1182 | if (! NILP (tem)) |
01050cb5 RM |
1183 | { |
1184 | Fmake_local_variable (sym); | |
1185 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1186 | } | |
1ab256cb RM |
1187 | } |
1188 | ||
1189 | /* Force mode-line redisplay. Useful here because all major mode | |
1190 | commands call this function. */ | |
1191 | update_mode_lines++; | |
1192 | ||
1193 | return Qnil; | |
1194 | } | |
1195 | \f | |
2eec3b4e RS |
1196 | /* Find all the overlays in the current buffer that contain position POS. |
1197 | Return the number found, and store them in a vector in *VEC_PTR. | |
1198 | Store in *LEN_PTR the size allocated for the vector. | |
1199 | Store in *NEXT_PTR the next position after POS where an overlay starts. | |
1200 | ||
1201 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
1202 | when this function is called. */ | |
1203 | ||
1204 | int | |
1205 | overlays_at (pos, vec_ptr, len_ptr, next_ptr) | |
1206 | int pos; | |
1207 | Lisp_Object **vec_ptr; | |
1208 | int *len_ptr; | |
1209 | int *next_ptr; | |
1ab256cb | 1210 | { |
2eec3b4e RS |
1211 | Lisp_Object tail, overlay, start, end, result; |
1212 | int idx = 0; | |
1213 | int len = *len_ptr; | |
1214 | Lisp_Object *vec = *vec_ptr; | |
1215 | int next = ZV; | |
1216 | int startpos; | |
1217 | ||
1218 | for (tail = current_buffer->overlays_before; | |
1219 | CONSP (tail); | |
1220 | tail = XCONS (tail)->cdr) | |
1221 | { | |
1222 | overlay = XCONS (tail)->car; | |
1223 | if (! OVERLAY_VALID (overlay)) | |
1224 | continue; | |
1ab256cb | 1225 | |
2eec3b4e RS |
1226 | start = OVERLAY_START (overlay); |
1227 | end = OVERLAY_END (overlay); | |
1228 | if (OVERLAY_POSITION (end) <= pos) | |
1229 | break; | |
1230 | startpos = OVERLAY_POSITION (start); | |
1231 | if (startpos <= pos) | |
1232 | { | |
1233 | if (idx == len) | |
1234 | { | |
1235 | *len_ptr = len *= 2; | |
1236 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1237 | *vec_ptr = vec; | |
1238 | } | |
1239 | vec[idx++] = overlay; | |
1240 | } | |
1241 | else if (startpos < next) | |
1242 | next = startpos; | |
1243 | } | |
1244 | ||
1245 | for (tail = current_buffer->overlays_after; | |
1246 | CONSP (tail); | |
1247 | tail = XCONS (tail)->cdr) | |
1ab256cb | 1248 | { |
2eec3b4e RS |
1249 | overlay = XCONS (tail)->car; |
1250 | if (! OVERLAY_VALID (overlay)) | |
1251 | continue; | |
1252 | ||
1253 | start = OVERLAY_START (overlay); | |
1254 | end = OVERLAY_END (overlay); | |
1255 | startpos = OVERLAY_POSITION (start); | |
1256 | if (startpos > pos) | |
1257 | { | |
1258 | if (startpos < next) | |
1259 | next = startpos; | |
1260 | break; | |
1261 | } | |
1262 | if (OVERLAY_POSITION (end) > pos) | |
1263 | { | |
1264 | if (idx == len) | |
1265 | { | |
1266 | *len_ptr = len *= 2; | |
1267 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1268 | *vec_ptr = vec; | |
1269 | } | |
1270 | vec[idx++] = overlay; | |
1271 | } | |
1ab256cb RM |
1272 | } |
1273 | ||
2eec3b4e RS |
1274 | *next_ptr = next; |
1275 | return idx; | |
1276 | } | |
1277 | \f | |
1278 | /* Shift overlays in the current buffer's overlay lists, | |
1279 | to center the lists at POS. */ | |
1ab256cb | 1280 | |
2eec3b4e RS |
1281 | void |
1282 | recenter_overlay_lists (pos) | |
1283 | int pos; | |
1284 | { | |
1285 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1286 | ||
1287 | /* See if anything in overlays_before should move to overlays_after. */ | |
1288 | ||
1289 | /* We don't strictly need prev in this loop; it should always be nil. | |
1290 | But we use it for symmetry and in case that should cease to be true | |
1291 | with some future change. */ | |
1292 | prev = Qnil; | |
1293 | for (tail = current_buffer->overlays_before; | |
1294 | CONSP (tail); | |
1295 | prev = tail, tail = next) | |
1ab256cb | 1296 | { |
2eec3b4e RS |
1297 | next = XCONS (tail)->cdr; |
1298 | overlay = XCONS (tail)->car; | |
1299 | ||
1300 | /* If the overlay is not valid, get rid of it. */ | |
1301 | if (!OVERLAY_VALID (overlay)) | |
1302 | { | |
1303 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1304 | if (!NILP (prev)) | |
1305 | XCONS (prev)->cdr = next; | |
1306 | else | |
1307 | current_buffer->overlays_before = next; | |
1308 | tail = prev; | |
1309 | continue; | |
1310 | } | |
1ab256cb | 1311 | |
2eec3b4e RS |
1312 | beg = OVERLAY_START (overlay); |
1313 | end = OVERLAY_END (overlay); | |
1ab256cb | 1314 | |
2eec3b4e | 1315 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1316 | { |
2eec3b4e RS |
1317 | /* OVERLAY needs to be moved. */ |
1318 | int where = OVERLAY_POSITION (beg); | |
1319 | Lisp_Object other, other_prev; | |
1320 | ||
1321 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1322 | if (!NILP (prev)) | |
1323 | XCONS (prev)->cdr = next; | |
1324 | else | |
1325 | current_buffer->overlays_before = next; | |
1326 | ||
1327 | /* Search thru overlays_after for where to put it. */ | |
1328 | other_prev = Qnil; | |
1329 | for (other = current_buffer->overlays_after; | |
1330 | CONSP (other); | |
1331 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1332 | { |
2eec3b4e RS |
1333 | Lisp_Object otherbeg, otheroverlay, follower; |
1334 | int win; | |
1335 | ||
1336 | otheroverlay = XCONS (other)->car; | |
1337 | if (! OVERLAY_VALID (otheroverlay)) | |
1338 | continue; | |
1339 | ||
1340 | otherbeg = OVERLAY_START (otheroverlay); | |
1341 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1342 | break; | |
1ab256cb | 1343 | } |
2eec3b4e RS |
1344 | |
1345 | /* Add TAIL to overlays_after before OTHER. */ | |
1346 | XCONS (tail)->cdr = other; | |
1347 | if (!NILP (other_prev)) | |
1348 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1349 | else |
2eec3b4e RS |
1350 | current_buffer->overlays_after = tail; |
1351 | tail = prev; | |
1ab256cb | 1352 | } |
2eec3b4e RS |
1353 | else |
1354 | /* We've reached the things that should stay in overlays_before. | |
1355 | All the rest of overlays_before must end even earlier, | |
1356 | so stop now. */ | |
1357 | break; | |
1358 | } | |
1359 | ||
1360 | /* See if anything in overlays_after should be in overlays_before. */ | |
1361 | prev = Qnil; | |
1362 | for (tail = current_buffer->overlays_after; | |
1363 | CONSP (tail); | |
1364 | prev = tail, tail = next) | |
1365 | { | |
1366 | next = XCONS (tail)->cdr; | |
1367 | overlay = XCONS (tail)->car; | |
1368 | ||
1369 | /* If the overlay is not valid, get rid of it. */ | |
1370 | if (!OVERLAY_VALID (overlay)) | |
1371 | { | |
1372 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1373 | if (!NILP (prev)) | |
1374 | XCONS (prev)->cdr = next; | |
1375 | else | |
1376 | current_buffer->overlays_after = next; | |
1377 | tail = prev; | |
1378 | continue; | |
1379 | } | |
1380 | ||
1381 | beg = OVERLAY_START (overlay); | |
1382 | end = OVERLAY_END (overlay); | |
1383 | ||
1384 | /* Stop looking, when we know that nothing further | |
1385 | can possibly end before POS. */ | |
1386 | if (OVERLAY_POSITION (beg) > pos) | |
1387 | break; | |
1388 | ||
1389 | if (OVERLAY_POSITION (end) <= pos) | |
1390 | { | |
1391 | /* OVERLAY needs to be moved. */ | |
1392 | int where = OVERLAY_POSITION (end); | |
1393 | Lisp_Object other, other_prev; | |
1394 | ||
1395 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1396 | if (!NILP (prev)) | |
1397 | XCONS (prev)->cdr = next; | |
1398 | else | |
1399 | current_buffer->overlays_after = next; | |
1400 | ||
1401 | /* Search thru overlays_before for where to put it. */ | |
1402 | other_prev = Qnil; | |
1403 | for (other = current_buffer->overlays_before; | |
1404 | CONSP (other); | |
1405 | other_prev = other, other = XCONS (other)->cdr) | |
1406 | { | |
1407 | Lisp_Object otherend, otheroverlay; | |
1408 | int win; | |
1409 | ||
1410 | otheroverlay = XCONS (other)->car; | |
1411 | if (! OVERLAY_VALID (otheroverlay)) | |
1412 | continue; | |
1413 | ||
1414 | otherend = OVERLAY_END (otheroverlay); | |
1415 | if (OVERLAY_POSITION (otherend) <= where) | |
1416 | break; | |
1417 | } | |
1418 | ||
1419 | /* Add TAIL to overlays_before before OTHER. */ | |
1420 | XCONS (tail)->cdr = other; | |
1421 | if (!NILP (other_prev)) | |
1422 | XCONS (other_prev)->cdr = tail; | |
1423 | else | |
1424 | current_buffer->overlays_before = tail; | |
1425 | tail = prev; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | XFASTINT (current_buffer->overlay_center) = pos; | |
1430 | } | |
1431 | \f | |
1432 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 2, 0, | |
1433 | "Create a new overlay in the current buffer, with range BEG to END.\n\ | |
1434 | BEG and END may be integers or markers.") | |
1435 | (beg, end) | |
1436 | Lisp_Object beg, end; | |
1437 | { | |
1438 | Lisp_Object overlay; | |
1439 | ||
1440 | if (MARKERP (beg) && XBUFFER (Fmarker_buffer (beg)) != current_buffer) | |
1441 | error ("Marker points into wrong buffer"); | |
1442 | if (MARKERP (end) && XBUFFER (Fmarker_buffer (end)) != current_buffer) | |
1443 | error ("Marker points into wrong buffer"); | |
1444 | ||
1445 | overlay = Fcons (Fcons (Fcopy_marker (beg), Fcopy_marker (end)), Qnil); | |
1446 | ||
1447 | /* Put the new overlay on the wrong list. */ | |
1448 | end = OVERLAY_END (overlay); | |
1449 | if (OVERLAY_POSITION (end) < XINT (current_buffer->overlay_center)) | |
1450 | current_buffer->overlays_after | |
1451 | = Fcons (overlay, current_buffer->overlays_after); | |
1452 | else | |
1453 | current_buffer->overlays_before | |
1454 | = Fcons (overlay, current_buffer->overlays_before); | |
1455 | ||
1456 | /* This puts it in the right list, and in the right order. */ | |
1457 | recenter_overlay_lists (XINT (current_buffer->overlay_center)); | |
1458 | ||
1459 | return overlay; | |
1460 | } | |
1461 | ||
1462 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 3, 0, | |
1463 | "Set the endpoints of OVERLAY to BEG and END.") | |
1464 | (overlay, beg, end) | |
1465 | Lisp_Object overlay, beg, end; | |
1466 | { | |
1467 | if (!OVERLAY_VALID (overlay)) | |
1468 | error ("Invalid overlay object"); | |
1469 | ||
1470 | current_buffer->overlays_before | |
1471 | = Fdelq (overlay, current_buffer->overlays_before); | |
1472 | current_buffer->overlays_after | |
1473 | = Fdelq (overlay, current_buffer->overlays_after); | |
1474 | ||
1475 | Fset_marker (OVERLAY_START (overlay), beg, Qnil); | |
1476 | Fset_marker (OVERLAY_END (overlay), end, Qnil); | |
1477 | ||
1478 | /* Put the overlay on the wrong list. */ | |
1479 | end = OVERLAY_END (overlay); | |
1480 | if (OVERLAY_POSITION (end) < XINT (current_buffer->overlay_center)) | |
1481 | current_buffer->overlays_after | |
1482 | = Fcons (overlay, current_buffer->overlays_after); | |
1483 | else | |
1484 | current_buffer->overlays_before | |
1485 | = Fcons (overlay, current_buffer->overlays_before); | |
1486 | ||
1487 | /* This puts it in the right list, and in the right order. */ | |
1488 | recenter_overlay_lists (XINT (current_buffer->overlay_center)); | |
1489 | ||
1490 | return overlay; | |
1491 | } | |
1492 | ||
1493 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
1494 | "Delete the overlay OVERLAY from the current buffer.") | |
1495 | (overlay) | |
1496 | { | |
1497 | current_buffer->overlays_before | |
1498 | = Fdelq (overlay, current_buffer->overlays_before); | |
1499 | current_buffer->overlays_after | |
1500 | = Fdelq (overlay, current_buffer->overlays_after); | |
1501 | return Qnil; | |
1502 | } | |
1503 | \f | |
1504 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, | |
1505 | "Return a list of the overays that contain position POS.") | |
1506 | (pos) | |
1507 | Lisp_Object pos; | |
1508 | { | |
1509 | int noverlays; | |
1510 | int endpos; | |
1511 | Lisp_Object *overlay_vec; | |
1512 | int len; | |
1513 | Lisp_Object result; | |
1514 | ||
1515 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1516 | ||
1517 | len = 10; | |
1518 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1519 | ||
1520 | /* Put all the overlays we want in a vector in overlay_vec. | |
1521 | Store the length in len. */ | |
1522 | noverlays = overlays_at (XINT (pos), &overlay_vec, &len, &endpos); | |
1523 | ||
1524 | /* Make a list of them all. */ | |
1525 | result = Flist (noverlays, overlay_vec); | |
1526 | ||
9ac0d9e0 | 1527 | xfree (overlay_vec); |
2eec3b4e RS |
1528 | return result; |
1529 | } | |
1530 | ||
1531 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
1532 | 1, 1, 0, | |
1533 | "Return the next position after POS where an overlay starts or ends.") | |
1534 | (pos) | |
1535 | Lisp_Object pos; | |
1536 | { | |
1537 | int noverlays; | |
1538 | int endpos; | |
1539 | Lisp_Object *overlay_vec; | |
1540 | int len; | |
1541 | Lisp_Object result; | |
1542 | int i; | |
1543 | ||
1544 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1545 | ||
1546 | len = 10; | |
1547 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1548 | ||
1549 | /* Put all the overlays we want in a vector in overlay_vec. | |
1550 | Store the length in len. | |
1551 | endpos gets the position where the next overlay starts. */ | |
1552 | noverlays = overlays_at (XINT (pos), &overlay_vec, &len, &endpos); | |
1553 | ||
1554 | /* If any of these overlays ends before endpos, | |
1555 | use its ending point instead. */ | |
1556 | for (i = 0; i < noverlays; i++) | |
1557 | { | |
1558 | Lisp_Object oend; | |
1559 | int oendpos; | |
1560 | ||
1561 | oend = OVERLAY_END (overlay_vec[i]); | |
1562 | oendpos = OVERLAY_POSITION (oend); | |
1563 | if (oendpos < endpos) | |
1564 | endpos = oendpos; | |
1ab256cb RM |
1565 | } |
1566 | ||
9ac0d9e0 | 1567 | xfree (overlay_vec); |
2eec3b4e RS |
1568 | return make_number (endpos); |
1569 | } | |
1570 | \f | |
1571 | /* These functions are for debugging overlays. */ | |
1572 | ||
1573 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
1574 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
1575 | The car has all the overlays before the overlay center;\n\ | |
1576 | the cdr has all the overlays before the overlay center.\n\ | |
1577 | Recentering overlays moves overlays between these lists.\n\ | |
1578 | The lists you get are copies, so that changing them has no effect.\n\ | |
1579 | However, the overlays you get are the real objects that the buffer uses.") | |
1580 | () | |
1581 | { | |
1582 | Lisp_Object before, after; | |
1583 | before = current_buffer->overlays_before; | |
1584 | if (CONSP (before)) | |
1585 | before = Fcopy_sequence (before); | |
1586 | after = current_buffer->overlays_after; | |
1587 | if (CONSP (after)) | |
1588 | after = Fcopy_sequence (after); | |
1589 | ||
1590 | return Fcons (before, after); | |
1591 | } | |
1592 | ||
1593 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
1594 | "Recenter the overlays of the current buffer around position POS.") | |
1595 | (pos) | |
1596 | Lisp_Object pos; | |
1597 | { | |
1598 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1599 | ||
1600 | recenter_overlay_lists (XINT (pos)); | |
1601 | return Qnil; | |
1602 | } | |
1603 | \f | |
1604 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
1605 | "Get the property of overlay OVERLAY with property name NAME.") | |
1606 | (overlay, prop) | |
1607 | Lisp_Object overlay, prop; | |
1608 | { | |
1609 | Lisp_Object plist; | |
1610 | for (plist = Fcdr_safe (Fcdr_safe (overlay)); | |
1611 | CONSP (plist) && CONSP (XCONS (plist)->cdr); | |
1612 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
1613 | { | |
1614 | if (EQ (XCONS (plist)->car, prop)) | |
1615 | return XCONS (XCONS (plist)->cdr)->car; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
1620 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
1621 | (overlay, prop, value) | |
1622 | Lisp_Object overlay, prop, value; | |
1623 | { | |
1624 | Lisp_Object plist, tail; | |
1625 | ||
1626 | plist = Fcdr_safe (Fcdr_safe (overlay)); | |
1627 | ||
1628 | for (tail = plist; | |
1629 | CONSP (tail) && CONSP (XCONS (tail)->cdr); | |
1630 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
1631 | { | |
1632 | if (EQ (XCONS (tail)->car, prop)) | |
1633 | return XCONS (XCONS (tail)->cdr)->car = value; | |
1634 | } | |
1635 | ||
1636 | if (! CONSP (XCONS (overlay)->cdr)) | |
1637 | XCONS (overlay)->cdr = Fcons (Qnil, Qnil); | |
1638 | ||
1639 | XCONS (XCONS (overlay)->cdr)->cdr | |
1640 | = Fcons (prop, Fcons (value, plist)); | |
1641 | ||
1642 | return value; | |
1ab256cb RM |
1643 | } |
1644 | \f | |
0fa3ba92 JB |
1645 | /* Somebody has tried to store NEWVAL into the buffer-local slot with |
1646 | offset XUINT (valcontents), and NEWVAL has an unacceptable type. */ | |
1647 | void | |
1648 | buffer_slot_type_mismatch (valcontents, newval) | |
1649 | Lisp_Object valcontents, newval; | |
1650 | { | |
1651 | unsigned int offset = XUINT (valcontents); | |
5fcd022d | 1652 | unsigned char *symbol_name = |
0fa3ba92 JB |
1653 | (XSYMBOL (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
1654 | ->name->data); | |
1655 | char *type_name; | |
1656 | ||
1657 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) | |
1658 | { | |
1659 | case Lisp_Int: type_name = "integers"; break; | |
1660 | case Lisp_String: type_name = "strings"; break; | |
1661 | case Lisp_Marker: type_name = "markers"; break; | |
1662 | case Lisp_Symbol: type_name = "symbols"; break; | |
1663 | case Lisp_Cons: type_name = "lists"; break; | |
5fcd022d | 1664 | case Lisp_Vector: type_name = "vectors"; break; |
0fa3ba92 JB |
1665 | default: |
1666 | abort (); | |
1667 | } | |
1668 | ||
1669 | error ("only %s should be stored in the buffer-local variable %s", | |
1670 | type_name, symbol_name); | |
1671 | } | |
1672 | \f | |
1ab256cb RM |
1673 | init_buffer_once () |
1674 | { | |
1675 | register Lisp_Object tem; | |
1676 | ||
1677 | /* Make sure all markable slots in buffer_defaults | |
1678 | are initialized reasonably, so mark_buffer won't choke. */ | |
1679 | reset_buffer (&buffer_defaults); | |
1680 | reset_buffer (&buffer_local_symbols); | |
1681 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); | |
1682 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); | |
1683 | ||
1684 | /* Set up the default values of various buffer slots. */ | |
1685 | /* Must do these before making the first buffer! */ | |
1686 | ||
1687 | /* real setup is done in loaddefs.el */ | |
1688 | buffer_defaults.mode_line_format = build_string ("%-"); | |
1689 | buffer_defaults.abbrev_mode = Qnil; | |
1690 | buffer_defaults.overwrite_mode = Qnil; | |
1691 | buffer_defaults.case_fold_search = Qt; | |
1692 | buffer_defaults.auto_fill_function = Qnil; | |
1693 | buffer_defaults.selective_display = Qnil; | |
1694 | #ifndef old | |
1695 | buffer_defaults.selective_display_ellipses = Qt; | |
1696 | #endif | |
1697 | buffer_defaults.abbrev_table = Qnil; | |
1698 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 1699 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 1700 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
1701 | buffer_defaults.overlays_before = Qnil; |
1702 | buffer_defaults.overlays_after = Qnil; | |
1703 | XFASTINT (buffer_defaults.overlay_center) = 1; | |
1ab256cb RM |
1704 | |
1705 | XFASTINT (buffer_defaults.tab_width) = 8; | |
1706 | buffer_defaults.truncate_lines = Qnil; | |
1707 | buffer_defaults.ctl_arrow = Qt; | |
1708 | ||
1709 | XFASTINT (buffer_defaults.fill_column) = 70; | |
1710 | XFASTINT (buffer_defaults.left_margin) = 0; | |
1711 | ||
1712 | /* Assign the local-flags to the slots that have default values. | |
1713 | The local flag is a bit that is used in the buffer | |
1714 | to say that it has its own local value for the slot. | |
1715 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
1716 | ||
1717 | /* Nothing can work if this isn't true */ | |
1718 | if (sizeof (int) != sizeof (Lisp_Object)) abort (); | |
1719 | ||
1720 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
1721 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
1722 | XFASTINT (buffer_local_flags.filename) = -1; | |
1723 | XFASTINT (buffer_local_flags.directory) = -1; | |
1724 | XFASTINT (buffer_local_flags.backed_up) = -1; | |
1725 | XFASTINT (buffer_local_flags.save_length) = -1; | |
1726 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; | |
1727 | XFASTINT (buffer_local_flags.read_only) = -1; | |
1728 | XFASTINT (buffer_local_flags.major_mode) = -1; | |
1729 | XFASTINT (buffer_local_flags.mode_name) = -1; | |
1730 | XFASTINT (buffer_local_flags.undo_list) = -1; | |
c48f61ef | 1731 | XFASTINT (buffer_local_flags.mark_active) = -1; |
1ab256cb RM |
1732 | |
1733 | XFASTINT (buffer_local_flags.mode_line_format) = 1; | |
1734 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; | |
1735 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; | |
1736 | XFASTINT (buffer_local_flags.case_fold_search) = 8; | |
1737 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; | |
1738 | XFASTINT (buffer_local_flags.selective_display) = 0x20; | |
1739 | #ifndef old | |
1740 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; | |
1741 | #endif | |
1742 | XFASTINT (buffer_local_flags.tab_width) = 0x80; | |
1743 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; | |
1744 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; | |
1745 | XFASTINT (buffer_local_flags.fill_column) = 0x400; | |
1746 | XFASTINT (buffer_local_flags.left_margin) = 0x800; | |
1747 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; | |
1748 | XFASTINT (buffer_local_flags.display_table) = 0x2000; | |
1ab256cb RM |
1749 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
1750 | ||
1751 | Vbuffer_alist = Qnil; | |
1752 | current_buffer = 0; | |
1753 | all_buffers = 0; | |
1754 | ||
1755 | QSFundamental = build_string ("Fundamental"); | |
1756 | ||
1757 | Qfundamental_mode = intern ("fundamental-mode"); | |
1758 | buffer_defaults.major_mode = Qfundamental_mode; | |
1759 | ||
1760 | Qmode_class = intern ("mode-class"); | |
1761 | ||
1762 | Qprotected_field = intern ("protected-field"); | |
1763 | ||
1764 | Qpermanent_local = intern ("permanent-local"); | |
1765 | ||
1766 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
1767 | ||
1768 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
1769 | /* super-magic invisible buffer */ | |
1770 | Vbuffer_alist = Qnil; | |
1771 | ||
ffd56f97 | 1772 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
1773 | } |
1774 | ||
1775 | init_buffer () | |
1776 | { | |
1777 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
1778 | char *pwd; |
1779 | struct stat dotstat, pwdstat; | |
1ab256cb RM |
1780 | |
1781 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
1782 | |
1783 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
1784 | when PWD is right, and may avoid a fatal error. */ | |
1785 | if ((pwd = getenv ("PWD")) != 0 && *pwd == '/' | |
1786 | && stat (pwd, &pwdstat) == 0 | |
1787 | && stat (".", &dotstat) == 0 | |
1788 | && dotstat.st_ino == pwdstat.st_ino | |
1789 | && dotstat.st_dev == pwdstat.st_dev | |
1790 | && strlen (pwd) < MAXPATHLEN) | |
1791 | strcpy (buf, pwd); | |
1792 | else if (getwd (buf) == 0) | |
1ab256cb RM |
1793 | fatal ("`getwd' failed: %s.\n", buf); |
1794 | ||
1795 | #ifndef VMS | |
1796 | /* Maybe this should really use some standard subroutine | |
1797 | whose definition is filename syntax dependent. */ | |
1798 | if (buf[strlen (buf) - 1] != '/') | |
1799 | strcat (buf, "/"); | |
1800 | #endif /* not VMS */ | |
1801 | current_buffer->directory = build_string (buf); | |
1802 | } | |
1803 | ||
1804 | /* initialize the buffer routines */ | |
1805 | syms_of_buffer () | |
1806 | { | |
188d4d11 RM |
1807 | extern Lisp_Object Qdisabled; |
1808 | ||
1ab256cb RM |
1809 | staticpro (&Vbuffer_defaults); |
1810 | staticpro (&Vbuffer_local_symbols); | |
1811 | staticpro (&Qfundamental_mode); | |
1812 | staticpro (&Qmode_class); | |
1813 | staticpro (&QSFundamental); | |
1814 | staticpro (&Vbuffer_alist); | |
1815 | staticpro (&Qprotected_field); | |
1816 | staticpro (&Qpermanent_local); | |
1817 | staticpro (&Qkill_buffer_hook); | |
1818 | ||
1819 | Fput (Qprotected_field, Qerror_conditions, | |
1820 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
1821 | Fput (Qprotected_field, Qerror_message, | |
1822 | build_string ("Attempt to modify a protected field")); | |
1823 | ||
188d4d11 RM |
1824 | Fput (intern ("erase-buffer"), Qdisabled, Qt); |
1825 | ||
1ab256cb RM |
1826 | /* All these use DEFVAR_LISP_NOPRO because the slots in |
1827 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
1828 | ||
1829 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
1830 | &buffer_defaults.mode_line_format, | |
1831 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
1832 | This is the same as (default-value 'mode-line-format)."); | |
1833 | ||
1834 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
1835 | &buffer_defaults.abbrev_mode, | |
1836 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
1837 | This is the same as (default-value 'abbrev-mode)."); | |
1838 | ||
1839 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
1840 | &buffer_defaults.ctl_arrow, | |
1841 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
1842 | This is the same as (default-value 'ctl-arrow)."); | |
1843 | ||
1844 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
1845 | &buffer_defaults.truncate_lines, | |
1846 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
1847 | This is the same as (default-value 'truncate-lines)."); | |
1848 | ||
1849 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
1850 | &buffer_defaults.fill_column, | |
1851 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
1852 | This is the same as (default-value 'fill-column)."); | |
1853 | ||
1854 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
1855 | &buffer_defaults.left_margin, | |
1856 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
1857 | This is the same as (default-value 'left-margin)."); | |
1858 | ||
1859 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
1860 | &buffer_defaults.tab_width, | |
1861 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
1862 | This is the same as (default-value 'tab-width)."); | |
1863 | ||
1864 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
1865 | &buffer_defaults.case_fold_search, | |
1866 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
1867 | This is the same as (default-value 'case-fold-search)."); | |
1868 | ||
0fa3ba92 JB |
1869 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
1870 | Qnil, 0); | |
1ab256cb RM |
1871 | |
1872 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
1873 | But make-docfile finds it! | |
1874 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 1875 | Qnil, |
1ab256cb RM |
1876 | "Template for displaying mode line for current buffer.\n\ |
1877 | Each buffer has its own value of this variable.\n\ | |
1878 | Value may be a string, a symbol or a list or cons cell.\n\ | |
1879 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
1880 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
1881 | in that the %-constructs below are not recognized.\n\ | |
1882 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
1883 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
1884 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
1885 | For a list whose car is a string or list, each element is processed\n\ | |
1886 | recursively and the results are effectively concatenated.\n\ | |
1887 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
1888 | and padded (if the number is positive) or truncated (if negative)\n\ | |
1889 | to the width specified by that number.\n\ | |
1890 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
1891 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
1892 | or when it is found in a cons-cell or a list)\n\ | |
1893 | %b -- print buffer name. %f -- print visited file name.\n\ | |
1894 | %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\ | |
1895 | %s -- print process status. %M -- print value of global-mode-string. (obs)\n\ | |
1896 | %p -- print percent of buffer above top of window, or top, bot or all.\n\ | |
1897 | %n -- print Narrow if appropriate.\n\ | |
1898 | %[ -- print one [ for each recursive editing level. %] similar.\n\ | |
1899 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
1900 | Decimal digits after the % specify field width to which to pad."); | |
1901 | */ | |
1902 | ||
1903 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
1904 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
1905 | nil here means use current buffer's major mode."); | |
1906 | ||
1907 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 1908 | make_number (Lisp_Symbol), |
1ab256cb RM |
1909 | "Symbol for current buffer's major mode."); |
1910 | ||
1911 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 1912 | make_number (Lisp_String), |
1ab256cb RM |
1913 | "Pretty name of current buffer's major mode (a string)."); |
1914 | ||
0fa3ba92 | 1915 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
1916 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
1917 | Automatically becomes buffer-local when set in any fashion."); | |
1918 | ||
1919 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 1920 | Qnil, |
1ab256cb RM |
1921 | "*Non-nil if searches should ignore case.\n\ |
1922 | Automatically becomes buffer-local when set in any fashion."); | |
1923 | ||
1924 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 1925 | make_number (Lisp_Int), |
1ab256cb RM |
1926 | "*Column beyond which automatic line-wrapping should happen.\n\ |
1927 | Automatically becomes buffer-local when set in any fashion."); | |
1928 | ||
1929 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 1930 | make_number (Lisp_Int), |
1ab256cb RM |
1931 | "*Column for the default indent-line-function to indent to.\n\ |
1932 | Linefeed indents to this column in Fundamental mode.\n\ | |
1933 | Automatically becomes buffer-local when set in any fashion."); | |
1934 | ||
1935 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 1936 | make_number (Lisp_Int), |
1ab256cb RM |
1937 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
1938 | Automatically becomes buffer-local when set in any fashion."); | |
1939 | ||
0fa3ba92 | 1940 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
1941 | "*Non-nil means display control chars with uparrow.\n\ |
1942 | Nil means use backslash and octal digits.\n\ | |
1943 | Automatically becomes buffer-local when set in any fashion.\n\ | |
1944 | This variable does not apply to characters whose display is specified\n\ | |
1945 | in the current display table (if there is one)."); | |
1946 | ||
0fa3ba92 | 1947 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
1948 | "*Non-nil means do not display continuation lines;\n\ |
1949 | give each line of text one screen line.\n\ | |
1950 | Automatically becomes buffer-local when set in any fashion.\n\ | |
1951 | \n\ | |
1952 | Note that this is overridden by the variable\n\ | |
1953 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 1954 | and this buffer is not full-frame width."); |
1ab256cb RM |
1955 | |
1956 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, | |
0fa3ba92 | 1957 | make_number (Lisp_String), |
1ab256cb RM |
1958 | "Name of default directory of current buffer. Should end with slash.\n\ |
1959 | Each buffer has its own value of this variable."); | |
1960 | ||
1961 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 1962 | Qnil, |
1ab256cb RM |
1963 | "Function called (if non-nil) to perform auto-fill.\n\ |
1964 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
1965 | Each buffer has its own value of this variable.\n\ | |
1966 | NOTE: This variable is not an ordinary hook;\n\ | |
1967 | It may not be a list of functions."); | |
1968 | ||
1969 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 1970 | make_number (Lisp_String), |
1ab256cb RM |
1971 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
1972 | Each buffer has its own value of this variable."); | |
1973 | ||
1974 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 1975 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 1976 | make_number (Lisp_String), |
1ab256cb RM |
1977 | "Name of file for auto-saving current buffer,\n\ |
1978 | or nil if buffer should not be auto-saved.\n\ | |
1979 | Each buffer has its own value of this variable."); | |
1980 | ||
0fa3ba92 | 1981 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
1982 | "Non-nil if this buffer is read-only.\n\ |
1983 | Each buffer has its own value of this variable."); | |
1984 | ||
0fa3ba92 | 1985 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
1986 | "Non-nil if this buffer's file has been backed up.\n\ |
1987 | Backing up is done before the first time the file is saved.\n\ | |
1988 | Each buffer has its own value of this variable."); | |
1989 | ||
1990 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 1991 | make_number (Lisp_Int), |
1ab256cb RM |
1992 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
1993 | 0 initially.\n\ | |
1994 | Each buffer has its own value of this variable."); | |
1995 | ||
1996 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 1997 | Qnil, |
1ab256cb RM |
1998 | "Non-nil enables selective display:\n\ |
1999 | Integer N as value means display only lines\n\ | |
2000 | that start with less than n columns of space.\n\ | |
2001 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
2002 | Then ^M's in the file are written into files as newlines.\n\n\ | |
2003 | Automatically becomes buffer-local when set in any fashion."); | |
2004 | ||
2005 | #ifndef old | |
2006 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
2007 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 2008 | Qnil, |
1ab256cb RM |
2009 | "t means display ... on previous line when a line is invisible.\n\ |
2010 | Automatically becomes buffer-local when set in any fashion."); | |
2011 | #endif | |
2012 | ||
0fa3ba92 | 2013 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 2014 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
2015 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
2016 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 2017 | until the tab is filled in.\n\ |
6bbb0d4a | 2018 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
2019 | Automatically becomes buffer-local when set in any fashion."); |
2020 | ||
2021 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
5d305367 | 2022 | Qnil, |
1ab256cb RM |
2023 | "Display table that controls display of the contents of current buffer.\n\ |
2024 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2025 | The display table is a vector created with `make-display-table'.\n\ | |
2026 | The first 256 elements control how to display each possible text character.\n\ | |
2027 | The value should be a \"rope\" (see `make-rope') or nil;\n\ | |
2028 | nil means display the character in the default fashion.\n\ | |
2029 | The remaining five elements are ropes that control the display of\n\ | |
2030 | the end of a truncated screen line (element 256);\n\ | |
2031 | the end of a continued line (element 257);\n\ | |
2032 | the escape character used to display character codes in octal (element 258);\n\ | |
2033 | the character used as an arrow for control characters (element 259);\n\ | |
2034 | the decoration indicating the presence of invisible lines (element 260).\n\ | |
2035 | If this variable is nil, the value of `standard-display-table' is used.\n\ | |
2036 | Each window can have its own, overriding display table."); | |
2037 | ||
1ab256cb RM |
2038 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
2039 | "Don't ask."); | |
2040 | */ | |
01050cb5 | 2041 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
2042 | "Function to call before each text change.\n\ |
2043 | Two arguments are passed to the function: the positions of\n\ | |
2044 | the beginning and end of the range of old text to be changed.\n\ | |
2045 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2046 | No information is given about the length of the text after the change.\n\ | |
2047 | position of the change\n\ | |
2048 | \n\ | |
2049 | While executing the `before-change-function', changes to buffers do not\n\ | |
2050 | cause calls to any `before-change-function' or `after-change-function'."); | |
2051 | Vbefore_change_function = Qnil; | |
2052 | ||
2053 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
2054 | "Function to call after each text change.\n\ | |
2055 | Three arguments are passed to the function: the positions of\n\ | |
2056 | the beginning and end of the range of changed text,\n\ | |
2057 | and the length of the pre-change text replaced by that range.\n\ | |
2058 | \(For an insertion, the pre-change length is zero;\n\ | |
2059 | for a deletion, that length is the number of characters deleted,\n\ | |
2060 | and the post-change beginning and end are at the same place.)\n\ | |
2061 | \n\ | |
2062 | While executing the `after-change-function', changes to buffers do not\n\ | |
2063 | cause calls to any `before-change-function' or `after-change-function'."); | |
2064 | Vafter_change_function = Qnil; | |
2065 | ||
dbc4e1c1 JB |
2066 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
2067 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
2068 | The functions are run using the `run-hooks' function."); | |
2069 | Vfirst_change_hook = Qnil; | |
2070 | Qfirst_change_hook = intern ("first-change-hook"); | |
2071 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 2072 | |
3f5fcd47 | 2073 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
2074 | "List of undo entries in current buffer.\n\ |
2075 | Recent changes come first; older changes follow newer.\n\ | |
2076 | \n\ | |
2077 | An entry (START . END) represents an insertion which begins at\n\ | |
2078 | position START and ends at position END.\n\ | |
2079 | \n\ | |
2080 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
2081 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
2082 | of the text being deleted; if negative, point was at the end.\n\ | |
2083 | \n\ | |
2084 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
2085 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
2086 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
2087 | modification count of the most recent save is different, this entry is\n\ | |
2088 | obsolete.\n\ | |
2089 | \n\ | |
483c1fd3 RS |
2090 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
2091 | was modified between BEG and END. PROP is the property name,\n\ | |
2092 | and VAL is the old value.\n\ | |
2093 | \n\ | |
bec44fd6 JB |
2094 | An entry of the form POSITION indicates that point was at the buffer\n\ |
2095 | location given by the integer. Undoing an entry of this form places\n\ | |
2096 | point at POSITION.\n\ | |
2097 | \n\ | |
1ab256cb RM |
2098 | nil marks undo boundaries. The undo command treats the changes\n\ |
2099 | between two undo boundaries as a single step to be undone.\n\ | |
2100 | \n\ | |
bec44fd6 | 2101 | If the value of the variable is t, undo information is not recorded."); |
1ab256cb | 2102 | |
c48f61ef RS |
2103 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
2104 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
2105 | Automatically local in all buffers."); | |
2106 | ||
2107 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, | |
2108 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
2109 | Vtransient_mark_mode = Qnil; | |
2110 | ||
1ab256cb RM |
2111 | defsubr (&Sbuffer_list); |
2112 | defsubr (&Sget_buffer); | |
2113 | defsubr (&Sget_file_buffer); | |
2114 | defsubr (&Sget_buffer_create); | |
01050cb5 | 2115 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
2116 | defsubr (&Sbuffer_name); |
2117 | /*defsubr (&Sbuffer_number);*/ | |
2118 | defsubr (&Sbuffer_file_name); | |
2119 | defsubr (&Sbuffer_local_variables); | |
2120 | defsubr (&Sbuffer_modified_p); | |
2121 | defsubr (&Sset_buffer_modified_p); | |
2122 | defsubr (&Sbuffer_modified_tick); | |
2123 | defsubr (&Srename_buffer); | |
2124 | defsubr (&Sother_buffer); | |
2125 | defsubr (&Sbuffer_disable_undo); | |
2126 | defsubr (&Sbuffer_enable_undo); | |
2127 | defsubr (&Skill_buffer); | |
2128 | defsubr (&Serase_buffer); | |
2129 | defsubr (&Sswitch_to_buffer); | |
2130 | defsubr (&Spop_to_buffer); | |
2131 | defsubr (&Scurrent_buffer); | |
2132 | defsubr (&Sset_buffer); | |
2133 | defsubr (&Sbarf_if_buffer_read_only); | |
2134 | defsubr (&Sbury_buffer); | |
2135 | defsubr (&Slist_buffers); | |
2136 | defsubr (&Skill_all_local_variables); | |
2eec3b4e RS |
2137 | |
2138 | defsubr (&Smake_overlay); | |
2139 | defsubr (&Sdelete_overlay); | |
2140 | defsubr (&Smove_overlay); | |
2141 | defsubr (&Soverlays_at); | |
2142 | defsubr (&Snext_overlay_change); | |
2143 | defsubr (&Soverlay_recenter); | |
2144 | defsubr (&Soverlay_lists); | |
2145 | defsubr (&Soverlay_get); | |
2146 | defsubr (&Soverlay_put); | |
1ab256cb RM |
2147 | } |
2148 | ||
2149 | keys_of_buffer () | |
2150 | { | |
2151 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
2152 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
2153 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
2154 | } |