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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 | ||
52f8ec73 JB |
127 | Lisp_Object Qoverlayp; |
128 | ||
1ab256cb RM |
129 | /* For debugging; temporary. See set_buffer_internal. */ |
130 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
131 | ||
132 | nsberror (spec) | |
133 | Lisp_Object spec; | |
134 | { | |
135 | if (XTYPE (spec) == Lisp_String) | |
136 | error ("No buffer named %s", XSTRING (spec)->data); | |
137 | error ("Invalid buffer argument"); | |
138 | } | |
139 | \f | |
140 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
141 | "Return a list of all existing live buffers.") | |
142 | () | |
143 | { | |
144 | return Fmapcar (Qcdr, Vbuffer_alist); | |
145 | } | |
146 | ||
147 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, | |
148 | "Return the buffer named NAME (a string).\n\ | |
149 | If there is no live buffer named NAME, return nil.\n\ | |
150 | NAME may also be a buffer; if so, the value is that buffer.") | |
151 | (name) | |
152 | register Lisp_Object name; | |
153 | { | |
154 | if (XTYPE (name) == Lisp_Buffer) | |
155 | return name; | |
156 | CHECK_STRING (name, 0); | |
157 | ||
158 | return Fcdr (Fassoc (name, Vbuffer_alist)); | |
159 | } | |
160 | ||
161 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
162 | "Return the buffer visiting file FILENAME (a string).\n\ | |
163 | If there is no such live buffer, return nil.") | |
164 | (filename) | |
165 | register Lisp_Object filename; | |
166 | { | |
167 | register Lisp_Object tail, buf, tem; | |
168 | CHECK_STRING (filename, 0); | |
169 | filename = Fexpand_file_name (filename, Qnil); | |
170 | ||
171 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
172 | { | |
173 | buf = Fcdr (XCONS (tail)->car); | |
174 | if (XTYPE (buf) != Lisp_Buffer) continue; | |
175 | if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue; | |
176 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); | |
265a9e55 | 177 | if (!NILP (tem)) |
1ab256cb RM |
178 | return buf; |
179 | } | |
180 | return Qnil; | |
181 | } | |
182 | ||
183 | /* Incremented for each buffer created, to assign the buffer number. */ | |
184 | int buffer_count; | |
185 | ||
186 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
187 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
188 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 189 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
190 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
191 | The value is never nil.") | |
192 | (name) | |
193 | register Lisp_Object name; | |
194 | { | |
195 | register Lisp_Object buf, function, tem; | |
196 | int count = specpdl_ptr - specpdl; | |
197 | register struct buffer *b; | |
198 | ||
199 | buf = Fget_buffer (name); | |
265a9e55 | 200 | if (!NILP (buf)) |
1ab256cb RM |
201 | return buf; |
202 | ||
9ac0d9e0 | 203 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb RM |
204 | |
205 | BUF_GAP_SIZE (b) = 20; | |
9ac0d9e0 | 206 | BLOCK_INPUT; |
1ab256cb | 207 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 208 | UNBLOCK_INPUT; |
1ab256cb RM |
209 | if (! BUF_BEG_ADDR (b)) |
210 | memory_full (); | |
211 | ||
212 | BUF_PT (b) = 1; | |
213 | BUF_GPT (b) = 1; | |
214 | BUF_BEGV (b) = 1; | |
215 | BUF_ZV (b) = 1; | |
216 | BUF_Z (b) = 1; | |
217 | BUF_MODIFF (b) = 1; | |
218 | ||
219 | /* Put this on the chain of all buffers including killed ones. */ | |
220 | b->next = all_buffers; | |
221 | all_buffers = b; | |
222 | ||
223 | b->mark = Fmake_marker (); | |
224 | /*b->number = make_number (++buffer_count);*/ | |
225 | b->name = name; | |
226 | if (XSTRING (name)->data[0] != ' ') | |
227 | b->undo_list = Qnil; | |
228 | else | |
229 | b->undo_list = Qt; | |
230 | ||
231 | reset_buffer (b); | |
232 | ||
233 | /* Put this in the alist of all live buffers. */ | |
234 | XSET (buf, Lisp_Buffer, b); | |
235 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
236 | ||
237 | b->mark = Fmake_marker (); | |
238 | b->markers = Qnil; | |
239 | b->name = name; | |
240 | ||
241 | function = buffer_defaults.major_mode; | |
265a9e55 | 242 | if (NILP (function)) |
1ab256cb RM |
243 | { |
244 | tem = Fget (current_buffer->major_mode, Qmode_class); | |
245 | if (EQ (tem, Qnil)) | |
246 | function = current_buffer->major_mode; | |
247 | } | |
248 | ||
265a9e55 | 249 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1ab256cb RM |
250 | return buf; |
251 | ||
252 | /* To select a nonfundamental mode, | |
253 | select the buffer temporarily and then call the mode function. */ | |
254 | ||
255 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
256 | ||
257 | Fset_buffer (buf); | |
258 | call0 (function); | |
259 | ||
260 | return unbind_to (count, buf); | |
261 | } | |
262 | ||
263 | /* Reinitialize everything about a buffer except its name and contents. */ | |
264 | ||
265 | void | |
266 | reset_buffer (b) | |
267 | register struct buffer *b; | |
268 | { | |
269 | b->filename = Qnil; | |
270 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; | |
271 | b->modtime = 0; | |
272 | b->save_modified = 1; | |
291026b5 | 273 | XFASTINT (b->save_length) = 0; |
1ab256cb RM |
274 | b->last_window_start = 1; |
275 | b->backed_up = Qnil; | |
276 | b->auto_save_modified = 0; | |
277 | b->auto_save_file_name = Qnil; | |
278 | b->read_only = Qnil; | |
2eec3b4e RS |
279 | b->overlays_before = Qnil; |
280 | b->overlays_after = Qnil; | |
281 | XFASTINT (b->overlay_center) = 1; | |
33f7013e JA |
282 | |
283 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
284 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
285 | ||
1ab256cb RM |
286 | reset_buffer_local_variables(b); |
287 | } | |
288 | ||
c48f61ef | 289 | reset_buffer_local_variables (b) |
1ab256cb RM |
290 | register struct buffer *b; |
291 | { | |
292 | register int offset; | |
293 | ||
294 | /* Reset the major mode to Fundamental, together with all the | |
295 | things that depend on the major mode. | |
296 | default-major-mode is handled at a higher level. | |
297 | We ignore it here. */ | |
298 | b->major_mode = Qfundamental_mode; | |
299 | b->keymap = Qnil; | |
300 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
301 | b->mode_name = QSFundamental; | |
302 | b->minor_modes = Qnil; | |
303 | b->downcase_table = Vascii_downcase_table; | |
304 | b->upcase_table = Vascii_upcase_table; | |
305 | b->case_canon_table = Vascii_downcase_table; | |
306 | b->case_eqv_table = Vascii_upcase_table; | |
c48f61ef | 307 | b->mark_active = Qnil; |
1ab256cb RM |
308 | #if 0 |
309 | b->sort_table = XSTRING (Vascii_sort_table); | |
310 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
311 | #endif /* 0 */ | |
312 | ||
313 | /* Reset all per-buffer variables to their defaults. */ | |
314 | b->local_var_alist = Qnil; | |
315 | b->local_var_flags = 0; | |
316 | ||
317 | /* For each slot that has a default value, | |
318 | copy that into the slot. */ | |
319 | ||
320 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
321 | offset < sizeof (struct buffer); | |
322 | offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */ | |
323 | if (*(int *)(offset + (char *) &buffer_local_flags) > 0 | |
324 | || *(int *)(offset + (char *) &buffer_local_flags) == -2) | |
325 | *(Lisp_Object *)(offset + (char *)b) = | |
326 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
327 | } | |
328 | ||
01050cb5 RM |
329 | /* We split this away from generate-new-buffer, because rename-buffer |
330 | and set-visited-file-name ought to be able to use this to really | |
331 | rename the buffer properly. */ | |
332 | ||
333 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
1ab256cb | 334 | 1, 1, 0, |
01050cb5 RM |
335 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
336 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 337 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
01050cb5 | 338 | until an unused name is found, and then return that name.") |
1ab256cb RM |
339 | (name) |
340 | register Lisp_Object name; | |
341 | { | |
342 | register Lisp_Object gentemp, tem; | |
343 | int count; | |
344 | char number[10]; | |
345 | ||
346 | CHECK_STRING (name, 0); | |
347 | ||
348 | tem = Fget_buffer (name); | |
265a9e55 | 349 | if (NILP (tem)) |
01050cb5 | 350 | return name; |
1ab256cb RM |
351 | |
352 | count = 1; | |
353 | while (1) | |
354 | { | |
355 | sprintf (number, "<%d>", ++count); | |
356 | gentemp = concat2 (name, build_string (number)); | |
357 | tem = Fget_buffer (gentemp); | |
265a9e55 | 358 | if (NILP (tem)) |
01050cb5 | 359 | return gentemp; |
1ab256cb RM |
360 | } |
361 | } | |
362 | ||
363 | \f | |
364 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
365 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 366 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
367 | (buffer) |
368 | register Lisp_Object buffer; | |
369 | { | |
265a9e55 | 370 | if (NILP (buffer)) |
1ab256cb RM |
371 | return current_buffer->name; |
372 | CHECK_BUFFER (buffer, 0); | |
373 | return XBUFFER (buffer)->name; | |
374 | } | |
375 | ||
376 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
377 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
378 | No argument or nil as argument means use the current buffer.") | |
379 | (buffer) | |
380 | register Lisp_Object buffer; | |
381 | { | |
265a9e55 | 382 | if (NILP (buffer)) |
1ab256cb RM |
383 | return current_buffer->filename; |
384 | CHECK_BUFFER (buffer, 0); | |
385 | return XBUFFER (buffer)->filename; | |
386 | } | |
387 | ||
388 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, | |
389 | Sbuffer_local_variables, 0, 1, 0, | |
390 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
391 | Each element looks like (SYMBOL . VALUE) and describes one variable.\n\ | |
392 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ | |
393 | No argument or nil as argument means use current buffer as BUFFER.") | |
394 | (buffer) | |
395 | register Lisp_Object buffer; | |
396 | { | |
397 | register struct buffer *buf; | |
398 | register Lisp_Object val; | |
399 | ||
265a9e55 | 400 | if (NILP (buffer)) |
1ab256cb RM |
401 | buf = current_buffer; |
402 | else | |
403 | { | |
404 | CHECK_BUFFER (buffer, 0); | |
405 | buf = XBUFFER (buffer); | |
406 | } | |
407 | ||
408 | { | |
409 | /* Reference each variable in the alist in our current buffer. | |
410 | If inquiring about the current buffer, this gets the current values, | |
411 | so store them into the alist so the alist is up to date. | |
412 | If inquiring about some other buffer, this swaps out any values | |
413 | for that buffer, making the alist up to date automatically. */ | |
414 | register Lisp_Object tem; | |
415 | for (tem = buf->local_var_alist; CONSP (tem); tem = XCONS (tem)->cdr) | |
416 | { | |
417 | Lisp_Object v1 = Fsymbol_value (XCONS (XCONS (tem)->car)->car); | |
418 | if (buf == current_buffer) | |
419 | XCONS (XCONS (tem)->car)->cdr = v1; | |
420 | } | |
421 | } | |
422 | ||
423 | /* Make a copy of the alist, to return it. */ | |
424 | val = Fcopy_alist (buf->local_var_alist); | |
425 | ||
426 | /* Add on all the variables stored in special slots. */ | |
427 | { | |
428 | register int offset, mask; | |
429 | ||
430 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
431 | offset < sizeof (struct buffer); | |
432 | offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */ | |
433 | { | |
434 | mask = *(int *)(offset + (char *) &buffer_local_flags); | |
435 | if (mask == -1 || (buf->local_var_flags & mask)) | |
436 | if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) | |
437 | == Lisp_Symbol) | |
438 | val = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols), | |
439 | *(Lisp_Object *)(offset + (char *)buf)), | |
440 | val); | |
441 | } | |
442 | } | |
443 | return (val); | |
444 | } | |
445 | ||
446 | \f | |
447 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
448 | 0, 1, 0, | |
449 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
450 | No argument or nil as argument means use current buffer as BUFFER.") | |
451 | (buffer) | |
452 | register Lisp_Object buffer; | |
453 | { | |
454 | register struct buffer *buf; | |
265a9e55 | 455 | if (NILP (buffer)) |
1ab256cb RM |
456 | buf = current_buffer; |
457 | else | |
458 | { | |
459 | CHECK_BUFFER (buffer, 0); | |
460 | buf = XBUFFER (buffer); | |
461 | } | |
462 | ||
463 | return buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil; | |
464 | } | |
465 | ||
466 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
467 | 1, 1, 0, | |
468 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
469 | A non-nil FLAG means mark the buffer modified.") | |
470 | (flag) | |
471 | register Lisp_Object flag; | |
472 | { | |
473 | register int already; | |
474 | register Lisp_Object fn; | |
475 | ||
476 | #ifdef CLASH_DETECTION | |
477 | /* If buffer becoming modified, lock the file. | |
478 | If buffer becoming unmodified, unlock the file. */ | |
479 | ||
480 | fn = current_buffer->filename; | |
265a9e55 | 481 | if (!NILP (fn)) |
1ab256cb RM |
482 | { |
483 | already = current_buffer->save_modified < MODIFF; | |
265a9e55 | 484 | if (!already && !NILP (flag)) |
1ab256cb | 485 | lock_file (fn); |
265a9e55 | 486 | else if (already && NILP (flag)) |
1ab256cb RM |
487 | unlock_file (fn); |
488 | } | |
489 | #endif /* CLASH_DETECTION */ | |
490 | ||
265a9e55 | 491 | current_buffer->save_modified = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
492 | update_mode_lines++; |
493 | return flag; | |
494 | } | |
495 | ||
496 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
497 | 0, 1, 0, | |
498 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
499 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
500 | that buffer is changed. It wraps around occasionally.\n\ | |
501 | No argument or nil as argument means use current buffer as BUFFER.") | |
502 | (buffer) | |
503 | register Lisp_Object buffer; | |
504 | { | |
505 | register struct buffer *buf; | |
265a9e55 | 506 | if (NILP (buffer)) |
1ab256cb RM |
507 | buf = current_buffer; |
508 | else | |
509 | { | |
510 | CHECK_BUFFER (buffer, 0); | |
511 | buf = XBUFFER (buffer); | |
512 | } | |
513 | ||
514 | return make_number (BUF_MODIFF (buf)); | |
515 | } | |
516 | \f | |
01050cb5 | 517 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
3bd779aa | 518 | "sRename buffer (to new name): \nP", |
1ab256cb | 519 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 520 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 521 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 522 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 523 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
524 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
525 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 526 | This does not change the name of the visited file (if any).") |
3bd779aa RS |
527 | (name, unique) |
528 | register Lisp_Object name, unique; | |
1ab256cb RM |
529 | { |
530 | register Lisp_Object tem, buf; | |
531 | ||
532 | CHECK_STRING (name, 0); | |
533 | tem = Fget_buffer (name); | |
01050cb5 RM |
534 | if (XBUFFER (tem) == current_buffer) |
535 | return current_buffer->name; | |
265a9e55 | 536 | if (!NILP (tem)) |
01050cb5 | 537 | { |
3bd779aa | 538 | if (!NILP (unique)) |
01050cb5 RM |
539 | name = Fgenerate_new_buffer_name (name); |
540 | else | |
541 | error ("Buffer name \"%s\" is in use", XSTRING (name)->data); | |
542 | } | |
1ab256cb RM |
543 | |
544 | current_buffer->name = name; | |
76f590d7 JB |
545 | |
546 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
547 | any windows displaying current_buffer will stay unchanged. */ | |
548 | update_mode_lines++; | |
549 | ||
1ab256cb RM |
550 | XSET (buf, Lisp_Buffer, current_buffer); |
551 | Fsetcar (Frassq (buf, Vbuffer_alist), name); | |
265a9e55 | 552 | if (NILP (current_buffer->filename) && !NILP (current_buffer->auto_save_file_name)) |
1ab256cb | 553 | call0 (intern ("rename-auto-save-file")); |
01050cb5 | 554 | return name; |
1ab256cb RM |
555 | } |
556 | ||
a0ebb746 | 557 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 558 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
559 | Buffers not visible in windows are preferred to visible buffers,\n\ |
560 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
561 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
562 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
563 | (buffer, visible_ok) |
564 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
565 | { |
566 | register Lisp_Object tail, buf, notsogood, tem; | |
567 | notsogood = Qnil; | |
568 | ||
265a9e55 | 569 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
570 | { |
571 | buf = Fcdr (Fcar (tail)); | |
572 | if (EQ (buf, buffer)) | |
573 | continue; | |
574 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
575 | continue; | |
a0ebb746 JB |
576 | if (NILP (visible_ok)) |
577 | tem = Fget_buffer_window (buf, Qnil); | |
578 | else | |
579 | tem = Qnil; | |
265a9e55 | 580 | if (NILP (tem)) |
1ab256cb | 581 | return buf; |
265a9e55 | 582 | if (NILP (notsogood)) |
1ab256cb RM |
583 | notsogood = buf; |
584 | } | |
265a9e55 | 585 | if (!NILP (notsogood)) |
1ab256cb RM |
586 | return notsogood; |
587 | return Fget_buffer_create (build_string ("*scratch*")); | |
588 | } | |
589 | \f | |
590 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 1,1, | |
591 | 0, | |
592 | "Make BUFFER stop keeping undo information.") | |
ffd56f97 JB |
593 | (buffer) |
594 | register Lisp_Object buffer; | |
1ab256cb | 595 | { |
ffd56f97 JB |
596 | Lisp_Object real_buffer; |
597 | ||
598 | if (NILP (buffer)) | |
599 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
600 | else | |
601 | { | |
602 | real_buffer = Fget_buffer (buffer); | |
603 | if (NILP (real_buffer)) | |
604 | nsberror (buffer); | |
605 | } | |
606 | ||
607 | XBUFFER (real_buffer)->undo_list = Qt; | |
608 | ||
1ab256cb RM |
609 | return Qnil; |
610 | } | |
611 | ||
612 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
613 | 0, 1, "", | |
614 | "Start keeping undo information for buffer BUFFER.\n\ | |
615 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
616 | (buffer) |
617 | register Lisp_Object buffer; | |
1ab256cb | 618 | { |
ffd56f97 | 619 | Lisp_Object real_buffer; |
1ab256cb | 620 | |
ffd56f97 JB |
621 | if (NILP (buffer)) |
622 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
1ab256cb RM |
623 | else |
624 | { | |
ffd56f97 JB |
625 | real_buffer = Fget_buffer (buffer); |
626 | if (NILP (real_buffer)) | |
627 | nsberror (buffer); | |
1ab256cb RM |
628 | } |
629 | ||
ffd56f97 JB |
630 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
631 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
632 | |
633 | return Qnil; | |
634 | } | |
635 | ||
636 | /* | |
637 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
638 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
639 | The buffer being killed will be current while the hook is running.\n\ | |
640 | See `kill-buffer'." | |
641 | */ | |
642 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
643 | "Kill the buffer BUFFER.\n\ | |
644 | The argument may be a buffer or may be the name of a buffer.\n\ | |
645 | An argument of nil means kill the current buffer.\n\n\ | |
646 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
647 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
648 | if not void, is a list of functions to be called, with no arguments,\n\ | |
649 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
650 | when the hook functions are called.\n\n\ | |
651 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
652 | with `delete-process'.") | |
653 | (bufname) | |
654 | Lisp_Object bufname; | |
655 | { | |
656 | Lisp_Object buf; | |
657 | register struct buffer *b; | |
658 | register Lisp_Object tem; | |
659 | register struct Lisp_Marker *m; | |
660 | struct gcpro gcpro1, gcpro2; | |
661 | ||
265a9e55 | 662 | if (NILP (bufname)) |
1ab256cb RM |
663 | buf = Fcurrent_buffer (); |
664 | else | |
665 | buf = Fget_buffer (bufname); | |
265a9e55 | 666 | if (NILP (buf)) |
1ab256cb RM |
667 | nsberror (bufname); |
668 | ||
669 | b = XBUFFER (buf); | |
670 | ||
671 | /* Query if the buffer is still modified. */ | |
265a9e55 | 672 | if (INTERACTIVE && !NILP (b->filename) |
1ab256cb RM |
673 | && BUF_MODIFF (b) > b->save_modified) |
674 | { | |
675 | GCPRO2 (buf, bufname); | |
676 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
677 | XSTRING (b->name)->data)); | |
678 | UNGCPRO; | |
265a9e55 | 679 | if (NILP (tem)) |
1ab256cb RM |
680 | return Qnil; |
681 | } | |
682 | ||
683 | /* Run kill-buffer hook with the buffer to be killed the current buffer. */ | |
684 | { | |
685 | register Lisp_Object val; | |
686 | int count = specpdl_ptr - specpdl; | |
687 | ||
688 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
689 | set_buffer_internal (b); | |
690 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
691 | unbind_to (count, Qnil); | |
692 | } | |
693 | ||
694 | /* We have no more questions to ask. Verify that it is valid | |
695 | to kill the buffer. This must be done after the questions | |
696 | since anything can happen within do_yes_or_no_p. */ | |
697 | ||
698 | /* Don't kill the minibuffer now current. */ | |
699 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
700 | return Qnil; | |
701 | ||
265a9e55 | 702 | if (NILP (b->name)) |
1ab256cb RM |
703 | return Qnil; |
704 | ||
705 | /* Make this buffer not be current. | |
706 | In the process, notice if this is the sole visible buffer | |
707 | and give up if so. */ | |
708 | if (b == current_buffer) | |
709 | { | |
172a9c1f | 710 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
711 | Fset_buffer (tem); |
712 | if (b == current_buffer) | |
713 | return Qnil; | |
714 | } | |
715 | ||
716 | /* Now there is no question: we can kill the buffer. */ | |
717 | ||
718 | #ifdef CLASH_DETECTION | |
719 | /* Unlock this buffer's file, if it is locked. */ | |
720 | unlock_buffer (b); | |
721 | #endif /* CLASH_DETECTION */ | |
722 | ||
1ab256cb | 723 | kill_buffer_processes (buf); |
1ab256cb RM |
724 | |
725 | tem = Vinhibit_quit; | |
726 | Vinhibit_quit = Qt; | |
727 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
728 | Freplace_buffer_in_windows (buf); | |
729 | Vinhibit_quit = tem; | |
730 | ||
731 | /* Delete any auto-save file. */ | |
732 | if (XTYPE (b->auto_save_file_name) == Lisp_String) | |
733 | { | |
734 | Lisp_Object tem; | |
735 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 736 | if (! NILP (tem)) |
1ab256cb RM |
737 | unlink (XSTRING (b->auto_save_file_name)->data); |
738 | } | |
739 | ||
740 | /* Unchain all markers of this buffer | |
741 | and leave them pointing nowhere. */ | |
742 | for (tem = b->markers; !EQ (tem, Qnil); ) | |
743 | { | |
744 | m = XMARKER (tem); | |
745 | m->buffer = 0; | |
746 | tem = m->chain; | |
747 | m->chain = Qnil; | |
748 | } | |
749 | b->markers = Qnil; | |
750 | ||
33f7013e JA |
751 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
752 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
753 | /* Perhaps we should explicitly free the interval tree here... */ | |
754 | ||
1ab256cb | 755 | b->name = Qnil; |
9ac0d9e0 | 756 | BLOCK_INPUT; |
1ab256cb | 757 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
9ac0d9e0 | 758 | UNBLOCK_INPUT; |
1ab256cb RM |
759 | b->undo_list = Qnil; |
760 | ||
761 | return Qt; | |
762 | } | |
763 | \f | |
36a8c287 JB |
764 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
765 | we do this each time BUF is selected visibly, the more recently | |
766 | selected buffers are always closer to the front of the list. This | |
767 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
768 | |
769 | record_buffer (buf) | |
770 | Lisp_Object buf; | |
771 | { | |
772 | register Lisp_Object link, prev; | |
773 | ||
774 | prev = Qnil; | |
775 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
776 | { | |
777 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
778 | break; | |
779 | prev = link; | |
780 | } | |
781 | ||
36a8c287 JB |
782 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
783 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 784 | |
265a9e55 | 785 | if (NILP (prev)) |
1ab256cb RM |
786 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
787 | else | |
788 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
789 | ||
790 | XCONS(link)->cdr = Vbuffer_alist; | |
791 | Vbuffer_alist = link; | |
792 | } | |
793 | ||
794 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", | |
795 | "Select buffer BUFFER in the current window.\n\ | |
796 | BUFFER may be a buffer or a buffer name.\n\ | |
797 | Optional second arg NORECORD non-nil means\n\ | |
798 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
799 | \n\ | |
800 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
801 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
802 | the window-buffer correspondences.") | |
803 | (bufname, norecord) | |
804 | Lisp_Object bufname, norecord; | |
805 | { | |
806 | register Lisp_Object buf; | |
807 | Lisp_Object tem; | |
808 | ||
809 | if (EQ (minibuf_window, selected_window)) | |
810 | error ("Cannot switch buffers in minibuffer window"); | |
811 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 812 | if (!NILP (tem)) |
1ab256cb RM |
813 | error ("Cannot switch buffers in a dedicated window"); |
814 | ||
265a9e55 | 815 | if (NILP (bufname)) |
172a9c1f | 816 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
817 | else |
818 | buf = Fget_buffer_create (bufname); | |
819 | Fset_buffer (buf); | |
265a9e55 | 820 | if (NILP (norecord)) |
1ab256cb RM |
821 | record_buffer (buf); |
822 | ||
823 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
824 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
825 | : selected_window, | |
1ab256cb RM |
826 | buf); |
827 | ||
828 | return Qnil; | |
829 | } | |
830 | ||
831 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
832 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
833 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
834 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
835 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
836 | window even if BUFFER is already visible in the selected window.") | |
837 | (bufname, other) | |
838 | Lisp_Object bufname, other; | |
839 | { | |
840 | register Lisp_Object buf; | |
265a9e55 | 841 | if (NILP (bufname)) |
172a9c1f | 842 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
843 | else |
844 | buf = Fget_buffer_create (bufname); | |
845 | Fset_buffer (buf); | |
846 | record_buffer (buf); | |
847 | Fselect_window (Fdisplay_buffer (buf, other)); | |
848 | return Qnil; | |
849 | } | |
850 | ||
851 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
852 | "Return the current buffer as a Lisp object.") | |
853 | () | |
854 | { | |
855 | register Lisp_Object buf; | |
856 | XSET (buf, Lisp_Buffer, current_buffer); | |
857 | return buf; | |
858 | } | |
859 | \f | |
860 | /* Set the current buffer to b */ | |
861 | ||
862 | void | |
863 | set_buffer_internal (b) | |
864 | register struct buffer *b; | |
865 | { | |
866 | register struct buffer *old_buf; | |
867 | register Lisp_Object tail, valcontents; | |
868 | enum Lisp_Type tem; | |
869 | ||
870 | if (current_buffer == b) | |
871 | return; | |
872 | ||
873 | windows_or_buffers_changed = 1; | |
874 | old_buf = current_buffer; | |
875 | current_buffer = b; | |
876 | last_known_column_point = -1; /* invalidate indentation cache */ | |
877 | ||
878 | /* Look down buffer's list of local Lisp variables | |
879 | to find and update any that forward into C variables. */ | |
880 | ||
265a9e55 | 881 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
882 | { |
883 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
884 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
885 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
886 | && (tem = XTYPE (XCONS (valcontents)->car), | |
887 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
888 | || tem == Lisp_Objfwd))) | |
889 | /* Just reference the variable | |
890 | to cause it to become set for this buffer. */ | |
891 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
892 | } | |
893 | ||
894 | /* Do the same with any others that were local to the previous buffer */ | |
895 | ||
896 | if (old_buf) | |
265a9e55 | 897 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
898 | { |
899 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
900 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
901 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
902 | && (tem = XTYPE (XCONS (valcontents)->car), | |
903 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
904 | || tem == Lisp_Objfwd))) | |
905 | /* Just reference the variable | |
906 | to cause it to become set for this buffer. */ | |
907 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
908 | } | |
909 | } | |
910 | ||
911 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, | |
912 | "Make the buffer BUFFER current for editing operations.\n\ | |
913 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
914 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
915 | This function does not display the buffer, so its effect ends\n\ | |
916 | when the current command terminates.\n\ | |
917 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
918 | (bufname) | |
919 | register Lisp_Object bufname; | |
920 | { | |
921 | register Lisp_Object buffer; | |
922 | buffer = Fget_buffer (bufname); | |
265a9e55 | 923 | if (NILP (buffer)) |
1ab256cb | 924 | nsberror (bufname); |
265a9e55 | 925 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
926 | error ("Selecting deleted buffer"); |
927 | set_buffer_internal (XBUFFER (buffer)); | |
928 | return buffer; | |
929 | } | |
930 | \f | |
931 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
932 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
933 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
934 | () | |
935 | { | |
265a9e55 | 936 | while (!NILP (current_buffer->read_only)) |
1ab256cb RM |
937 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
938 | return Qnil; | |
939 | } | |
940 | ||
941 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
942 | "Put BUFFER at the end of the list of all buffers.\n\ | |
943 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 944 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
945 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
946 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
947 | selected window if it is displayed there.") | |
1ab256cb RM |
948 | (buf) |
949 | register Lisp_Object buf; | |
950 | { | |
b271272a | 951 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 952 | if (NILP (buf)) |
a5611885 JB |
953 | { |
954 | XSET (buf, Lisp_Buffer, current_buffer); | |
955 | ||
956 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 957 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 958 | } |
1ab256cb RM |
959 | else |
960 | { | |
961 | Lisp_Object buf1; | |
962 | ||
963 | buf1 = Fget_buffer (buf); | |
265a9e55 | 964 | if (NILP (buf1)) |
1ab256cb RM |
965 | nsberror (buf); |
966 | buf = buf1; | |
b271272a JB |
967 | } |
968 | ||
a5611885 | 969 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
970 | { |
971 | register Lisp_Object aelt, link; | |
972 | ||
973 | aelt = Frassq (buf, Vbuffer_alist); | |
974 | link = Fmemq (aelt, Vbuffer_alist); | |
975 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
976 | XCONS (link)->cdr = Qnil; | |
977 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
978 | } | |
1ab256cb | 979 | |
1ab256cb RM |
980 | return Qnil; |
981 | } | |
982 | \f | |
c922bc55 | 983 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 984 | "Delete the entire contents of the current buffer.\n\ |
a5611885 | 985 | Any clipping restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
986 | so the buffer is truly empty after this.") |
987 | () | |
988 | { | |
989 | Fwiden (); | |
990 | del_range (BEG, Z); | |
991 | current_buffer->last_window_start = 1; | |
992 | /* Prevent warnings, or suspension of auto saving, that would happen | |
993 | if future size is less than past size. Use of erase-buffer | |
994 | implies that the future text is not really related to the past text. */ | |
995 | XFASTINT (current_buffer->save_length) = 0; | |
996 | return Qnil; | |
997 | } | |
998 | ||
999 | validate_region (b, e) | |
1000 | register Lisp_Object *b, *e; | |
1001 | { | |
1002 | register int i; | |
1003 | ||
1004 | CHECK_NUMBER_COERCE_MARKER (*b, 0); | |
1005 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1006 | ||
1007 | if (XINT (*b) > XINT (*e)) | |
1008 | { | |
1009 | i = XFASTINT (*b); /* This is legit even if *b is < 0 */ | |
1010 | *b = *e; | |
1011 | XFASTINT (*e) = i; /* because this is all we do with i. */ | |
1012 | } | |
1013 | ||
1014 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1015 | && XINT (*e) <= ZV)) | |
1016 | args_out_of_range (*b, *e); | |
1017 | } | |
1018 | \f | |
1019 | Lisp_Object | |
1020 | list_buffers_1 (files) | |
1021 | Lisp_Object files; | |
1022 | { | |
1023 | register Lisp_Object tail, tem, buf; | |
1024 | Lisp_Object col1, col2, col3, minspace; | |
1025 | register struct buffer *old = current_buffer, *b; | |
1026 | int desired_point = 0; | |
1027 | Lisp_Object other_file_symbol; | |
1028 | ||
1029 | other_file_symbol = intern ("list-buffers-directory"); | |
1030 | ||
1031 | XFASTINT (col1) = 19; | |
1032 | XFASTINT (col2) = 25; | |
1033 | XFASTINT (col3) = 40; | |
1034 | XFASTINT (minspace) = 1; | |
1035 | ||
1036 | Fset_buffer (Vstandard_output); | |
1037 | ||
1038 | tail = intern ("Buffer-menu-mode"); | |
1039 | if (!EQ (tail, current_buffer->major_mode) | |
265a9e55 | 1040 | && (tem = Ffboundp (tail), !NILP (tem))) |
1ab256cb RM |
1041 | call0 (tail); |
1042 | Fbuffer_disable_undo (Vstandard_output); | |
1043 | current_buffer->read_only = Qnil; | |
1044 | ||
1045 | write_string ("\ | |
1046 | MR Buffer Size Mode File\n\ | |
1047 | -- ------ ---- ---- ----\n", -1); | |
1048 | ||
265a9e55 | 1049 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
1050 | { |
1051 | buf = Fcdr (Fcar (tail)); | |
1052 | b = XBUFFER (buf); | |
1053 | /* Don't mention the minibuffers. */ | |
1054 | if (XSTRING (b->name)->data[0] == ' ') | |
1055 | continue; | |
1056 | /* Optionally don't mention buffers that lack files. */ | |
265a9e55 | 1057 | if (!NILP (files) && NILP (b->filename)) |
1ab256cb RM |
1058 | continue; |
1059 | /* Identify the current buffer. */ | |
1060 | if (b == old) | |
1061 | desired_point = point; | |
1062 | write_string (b == old ? "." : " ", -1); | |
1063 | /* Identify modified buffers */ | |
1064 | write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1); | |
265a9e55 | 1065 | write_string (NILP (b->read_only) ? " " : "% ", -1); |
1ab256cb RM |
1066 | Fprinc (b->name, Qnil); |
1067 | Findent_to (col1, make_number (2)); | |
1068 | XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b); | |
1069 | Fprin1 (tem, Qnil); | |
1070 | Findent_to (col2, minspace); | |
1071 | Fprinc (b->mode_name, Qnil); | |
1072 | Findent_to (col3, minspace); | |
1073 | ||
265a9e55 | 1074 | if (!NILP (b->filename)) |
1ab256cb RM |
1075 | Fprinc (b->filename, Qnil); |
1076 | else | |
1077 | { | |
1078 | /* No visited file; check local value of list-buffers-directory. */ | |
1079 | Lisp_Object tem; | |
1080 | set_buffer_internal (b); | |
1081 | tem = Fboundp (other_file_symbol); | |
265a9e55 | 1082 | if (!NILP (tem)) |
1ab256cb RM |
1083 | { |
1084 | tem = Fsymbol_value (other_file_symbol); | |
1085 | Fset_buffer (Vstandard_output); | |
1086 | if (XTYPE (tem) == Lisp_String) | |
1087 | Fprinc (tem, Qnil); | |
1088 | } | |
1089 | else | |
1090 | Fset_buffer (Vstandard_output); | |
1091 | } | |
1092 | write_string ("\n", -1); | |
1093 | } | |
1094 | ||
1095 | current_buffer->read_only = Qt; | |
1096 | set_buffer_internal (old); | |
1097 | /* Foo. This doesn't work since temp_output_buffer_show sets point to 1 | |
1098 | if (desired_point) | |
1099 | XBUFFER (Vstandard_output)->text.pointloc = desired_point; | |
1100 | */ | |
1101 | return Qnil; | |
1102 | } | |
1103 | ||
1104 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", | |
1105 | "Display a list of names of existing buffers.\n\ | |
1106 | The list is displayed in a buffer named `*Buffer List*'.\n\ | |
1107 | Note that buffers with names starting with spaces are omitted.\n\ | |
1108 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ | |
1109 | \n\ | |
1110 | The M column contains a * for buffers that are modified.\n\ | |
1111 | The R column contains a % for buffers that are read-only.") | |
1112 | (files) | |
1113 | Lisp_Object files; | |
1114 | { | |
1115 | internal_with_output_to_temp_buffer ("*Buffer List*", | |
1116 | list_buffers_1, files); | |
1117 | return Qnil; | |
1118 | } | |
1119 | ||
1120 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, | |
1121 | 0, 0, 0, | |
1122 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1123 | Most local variable bindings are eliminated so that the default values\n\ | |
1124 | become effective once more. Also, the syntax table is set from\n\ | |
1125 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1126 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1127 | This function also forces redisplay of the mode line.\n\ | |
1128 | \n\ | |
1129 | Every function to select a new major mode starts by\n\ | |
1130 | calling this function.\n\n\ | |
1131 | As a special exception, local variables whose names have\n\ | |
1132 | a non-nil `permanent-local' property are not eliminated by this function.") | |
1133 | () | |
1134 | { | |
1135 | register Lisp_Object alist, sym, tem; | |
1136 | Lisp_Object oalist; | |
1137 | oalist = current_buffer->local_var_alist; | |
1138 | ||
1139 | /* Make sure no local variables remain set up with this buffer | |
1140 | for their current values. */ | |
1141 | ||
265a9e55 | 1142 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1143 | { |
1144 | sym = XCONS (XCONS (alist)->car)->car; | |
1145 | ||
1146 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1147 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car; | |
1148 | if (XBUFFER (tem) == current_buffer) | |
1149 | { | |
1150 | /* Symbol is set up for this buffer's old local value. | |
1151 | Set it up for the current buffer with the default value. */ | |
1152 | ||
1153 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr; | |
542143d7 RS |
1154 | /* Store the symbol's current value into the alist entry |
1155 | it is currently set up for. This is so that, if the | |
1156 | local is marked permanent, and we make it local again below, | |
1157 | we don't lose the value. */ | |
1158 | XCONS (XCONS (tem)->car)->cdr = XCONS (XSYMBOL (sym)->value)->car; | |
1159 | /* Switch to the symbol's default-value alist entry. */ | |
1ab256cb | 1160 | XCONS (tem)->car = tem; |
542143d7 | 1161 | /* Mark it as current for the current buffer. */ |
1ab256cb | 1162 | XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer (); |
542143d7 | 1163 | /* Store the current value into any forwarding in the symbol. */ |
1ab256cb RM |
1164 | store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car, |
1165 | XCONS (tem)->cdr); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | /* Actually eliminate all local bindings of this buffer. */ | |
1170 | ||
1171 | reset_buffer_local_variables (current_buffer); | |
1172 | ||
1173 | /* Redisplay mode lines; we are changing major mode. */ | |
1174 | ||
1175 | update_mode_lines++; | |
1176 | ||
1177 | /* Any which are supposed to be permanent, | |
1178 | make local again, with the same values they had. */ | |
1179 | ||
265a9e55 | 1180 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1181 | { |
1182 | sym = XCONS (XCONS (alist)->car)->car; | |
1183 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1184 | if (! NILP (tem)) |
01050cb5 RM |
1185 | { |
1186 | Fmake_local_variable (sym); | |
1187 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1188 | } | |
1ab256cb RM |
1189 | } |
1190 | ||
1191 | /* Force mode-line redisplay. Useful here because all major mode | |
1192 | commands call this function. */ | |
1193 | update_mode_lines++; | |
1194 | ||
1195 | return Qnil; | |
1196 | } | |
1197 | \f | |
2eec3b4e RS |
1198 | /* Find all the overlays in the current buffer that contain position POS. |
1199 | Return the number found, and store them in a vector in *VEC_PTR. | |
1200 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1201 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1202 | or ZV if there are no more overlays. | |
2eec3b4e RS |
1203 | |
1204 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
1205 | when this function is called. */ | |
1206 | ||
1207 | int | |
1208 | overlays_at (pos, vec_ptr, len_ptr, next_ptr) | |
1209 | int pos; | |
1210 | Lisp_Object **vec_ptr; | |
1211 | int *len_ptr; | |
1212 | int *next_ptr; | |
1ab256cb | 1213 | { |
2eec3b4e RS |
1214 | Lisp_Object tail, overlay, start, end, result; |
1215 | int idx = 0; | |
1216 | int len = *len_ptr; | |
1217 | Lisp_Object *vec = *vec_ptr; | |
1218 | int next = ZV; | |
2eec3b4e RS |
1219 | for (tail = current_buffer->overlays_before; |
1220 | CONSP (tail); | |
1221 | tail = XCONS (tail)->cdr) | |
1222 | { | |
52f8ec73 JB |
1223 | int startpos; |
1224 | ||
2eec3b4e RS |
1225 | overlay = XCONS (tail)->car; |
1226 | if (! OVERLAY_VALID (overlay)) | |
52f8ec73 | 1227 | abort (); |
1ab256cb | 1228 | |
2eec3b4e RS |
1229 | start = OVERLAY_START (overlay); |
1230 | end = OVERLAY_END (overlay); | |
1231 | if (OVERLAY_POSITION (end) <= pos) | |
1232 | break; | |
1233 | startpos = OVERLAY_POSITION (start); | |
1234 | if (startpos <= pos) | |
1235 | { | |
1236 | if (idx == len) | |
1237 | { | |
1238 | *len_ptr = len *= 2; | |
1239 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1240 | *vec_ptr = vec; | |
1241 | } | |
1242 | vec[idx++] = overlay; | |
1243 | } | |
1244 | else if (startpos < next) | |
1245 | next = startpos; | |
1246 | } | |
1247 | ||
1248 | for (tail = current_buffer->overlays_after; | |
1249 | CONSP (tail); | |
1250 | tail = XCONS (tail)->cdr) | |
1ab256cb | 1251 | { |
52f8ec73 JB |
1252 | int startpos; |
1253 | ||
2eec3b4e RS |
1254 | overlay = XCONS (tail)->car; |
1255 | if (! OVERLAY_VALID (overlay)) | |
52f8ec73 | 1256 | abort (); |
2eec3b4e RS |
1257 | |
1258 | start = OVERLAY_START (overlay); | |
1259 | end = OVERLAY_END (overlay); | |
1260 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1261 | if (pos < startpos) |
2eec3b4e RS |
1262 | { |
1263 | if (startpos < next) | |
1264 | next = startpos; | |
1265 | break; | |
1266 | } | |
52f8ec73 | 1267 | if (pos < OVERLAY_POSITION (end)) |
2eec3b4e RS |
1268 | { |
1269 | if (idx == len) | |
1270 | { | |
1271 | *len_ptr = len *= 2; | |
1272 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1273 | *vec_ptr = vec; | |
1274 | } | |
1275 | vec[idx++] = overlay; | |
1276 | } | |
1ab256cb RM |
1277 | } |
1278 | ||
2eec3b4e RS |
1279 | *next_ptr = next; |
1280 | return idx; | |
1281 | } | |
1282 | \f | |
5c4f68f1 | 1283 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1284 | |
2eec3b4e | 1285 | void |
5c4f68f1 JB |
1286 | recenter_overlay_lists (buf, pos) |
1287 | struct buffer *buf; | |
2eec3b4e RS |
1288 | int pos; |
1289 | { | |
1290 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1291 | ||
1292 | /* See if anything in overlays_before should move to overlays_after. */ | |
1293 | ||
1294 | /* We don't strictly need prev in this loop; it should always be nil. | |
1295 | But we use it for symmetry and in case that should cease to be true | |
1296 | with some future change. */ | |
1297 | prev = Qnil; | |
5c4f68f1 | 1298 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1299 | CONSP (tail); |
1300 | prev = tail, tail = next) | |
1ab256cb | 1301 | { |
2eec3b4e RS |
1302 | next = XCONS (tail)->cdr; |
1303 | overlay = XCONS (tail)->car; | |
1304 | ||
1305 | /* If the overlay is not valid, get rid of it. */ | |
1306 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1307 | #if 1 |
1308 | abort (); | |
1309 | #else | |
2eec3b4e RS |
1310 | { |
1311 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1312 | if (!NILP (prev)) | |
1313 | XCONS (prev)->cdr = next; | |
1314 | else | |
5c4f68f1 | 1315 | buf->overlays_before = next; |
2eec3b4e RS |
1316 | tail = prev; |
1317 | continue; | |
1318 | } | |
52f8ec73 | 1319 | #endif |
1ab256cb | 1320 | |
2eec3b4e RS |
1321 | beg = OVERLAY_START (overlay); |
1322 | end = OVERLAY_END (overlay); | |
1ab256cb | 1323 | |
2eec3b4e | 1324 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1325 | { |
2eec3b4e RS |
1326 | /* OVERLAY needs to be moved. */ |
1327 | int where = OVERLAY_POSITION (beg); | |
1328 | Lisp_Object other, other_prev; | |
1329 | ||
1330 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1331 | if (!NILP (prev)) | |
1332 | XCONS (prev)->cdr = next; | |
1333 | else | |
5c4f68f1 | 1334 | buf->overlays_before = next; |
2eec3b4e RS |
1335 | |
1336 | /* Search thru overlays_after for where to put it. */ | |
1337 | other_prev = Qnil; | |
5c4f68f1 | 1338 | for (other = buf->overlays_after; |
2eec3b4e RS |
1339 | CONSP (other); |
1340 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1341 | { |
2eec3b4e RS |
1342 | Lisp_Object otherbeg, otheroverlay, follower; |
1343 | int win; | |
1344 | ||
1345 | otheroverlay = XCONS (other)->car; | |
1346 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1347 | abort (); |
2eec3b4e RS |
1348 | |
1349 | otherbeg = OVERLAY_START (otheroverlay); | |
1350 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1351 | break; | |
1ab256cb | 1352 | } |
2eec3b4e RS |
1353 | |
1354 | /* Add TAIL to overlays_after before OTHER. */ | |
1355 | XCONS (tail)->cdr = other; | |
1356 | if (!NILP (other_prev)) | |
1357 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1358 | else |
5c4f68f1 | 1359 | buf->overlays_after = tail; |
2eec3b4e | 1360 | tail = prev; |
1ab256cb | 1361 | } |
2eec3b4e RS |
1362 | else |
1363 | /* We've reached the things that should stay in overlays_before. | |
1364 | All the rest of overlays_before must end even earlier, | |
1365 | so stop now. */ | |
1366 | break; | |
1367 | } | |
1368 | ||
1369 | /* See if anything in overlays_after should be in overlays_before. */ | |
1370 | prev = Qnil; | |
5c4f68f1 | 1371 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1372 | CONSP (tail); |
1373 | prev = tail, tail = next) | |
1374 | { | |
1375 | next = XCONS (tail)->cdr; | |
1376 | overlay = XCONS (tail)->car; | |
1377 | ||
1378 | /* If the overlay is not valid, get rid of it. */ | |
1379 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1380 | #if 1 |
1381 | abort (); | |
1382 | #else | |
2eec3b4e RS |
1383 | { |
1384 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1385 | if (!NILP (prev)) | |
1386 | XCONS (prev)->cdr = next; | |
1387 | else | |
5c4f68f1 | 1388 | buf->overlays_after = next; |
2eec3b4e RS |
1389 | tail = prev; |
1390 | continue; | |
1391 | } | |
52f8ec73 | 1392 | #endif |
2eec3b4e RS |
1393 | |
1394 | beg = OVERLAY_START (overlay); | |
1395 | end = OVERLAY_END (overlay); | |
1396 | ||
1397 | /* Stop looking, when we know that nothing further | |
1398 | can possibly end before POS. */ | |
1399 | if (OVERLAY_POSITION (beg) > pos) | |
1400 | break; | |
1401 | ||
1402 | if (OVERLAY_POSITION (end) <= pos) | |
1403 | { | |
1404 | /* OVERLAY needs to be moved. */ | |
1405 | int where = OVERLAY_POSITION (end); | |
1406 | Lisp_Object other, other_prev; | |
1407 | ||
1408 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1409 | if (!NILP (prev)) | |
1410 | XCONS (prev)->cdr = next; | |
1411 | else | |
5c4f68f1 | 1412 | buf->overlays_after = next; |
2eec3b4e RS |
1413 | |
1414 | /* Search thru overlays_before for where to put it. */ | |
1415 | other_prev = Qnil; | |
5c4f68f1 | 1416 | for (other = buf->overlays_before; |
2eec3b4e RS |
1417 | CONSP (other); |
1418 | other_prev = other, other = XCONS (other)->cdr) | |
1419 | { | |
1420 | Lisp_Object otherend, otheroverlay; | |
1421 | int win; | |
1422 | ||
1423 | otheroverlay = XCONS (other)->car; | |
1424 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1425 | abort (); |
2eec3b4e RS |
1426 | |
1427 | otherend = OVERLAY_END (otheroverlay); | |
1428 | if (OVERLAY_POSITION (otherend) <= where) | |
1429 | break; | |
1430 | } | |
1431 | ||
1432 | /* Add TAIL to overlays_before before OTHER. */ | |
1433 | XCONS (tail)->cdr = other; | |
1434 | if (!NILP (other_prev)) | |
1435 | XCONS (other_prev)->cdr = tail; | |
1436 | else | |
5c4f68f1 | 1437 | buf->overlays_before = tail; |
2eec3b4e RS |
1438 | tail = prev; |
1439 | } | |
1440 | } | |
1441 | ||
5c4f68f1 | 1442 | XFASTINT (buf->overlay_center) = pos; |
2eec3b4e RS |
1443 | } |
1444 | \f | |
52f8ec73 JB |
1445 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1446 | "Return t if OBJECT is an overlay.") | |
1447 | (object) | |
1448 | Lisp_Object object; | |
1449 | { | |
1450 | return (OVERLAYP (object) ? Qt : Qnil); | |
1451 | } | |
1452 | ||
5c4f68f1 JB |
1453 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1454 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1455 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1456 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1457 | (beg, end, buffer) |
1458 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1459 | { |
1460 | Lisp_Object overlay; | |
5c4f68f1 | 1461 | struct buffer *b; |
2eec3b4e | 1462 | |
5c4f68f1 JB |
1463 | if (NILP (buffer)) |
1464 | XSET (buffer, Lisp_Buffer, current_buffer); | |
1465 | CHECK_BUFFER (buffer, 2); | |
2eec3b4e | 1466 | |
5c4f68f1 JB |
1467 | b = XBUFFER (buffer); |
1468 | ||
1469 | if (MARKERP (beg)) | |
1470 | { | |
1471 | if (! EQ (Fmarker_buffer (beg), buffer)) | |
1472 | error ("Marker points into wrong buffer"); | |
1473 | else | |
1474 | beg = Fcopy_marker (beg); | |
1475 | } | |
1476 | else | |
1477 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
1478 | if (MARKERP (end)) | |
1479 | { | |
1480 | if (! EQ (Fmarker_buffer (end), buffer)) | |
1481 | error ("Marker points into wrong buffer"); | |
1482 | else | |
1483 | end = Fcopy_marker (end); | |
1484 | } | |
1485 | else | |
1486 | end = Fset_marker (Fmake_marker (), end, buffer); | |
1487 | ||
1488 | overlay = Fcons (Fcons (beg, end), Qnil); | |
52f8ec73 | 1489 | XSETTYPE (overlay, Lisp_Overlay); |
2eec3b4e RS |
1490 | |
1491 | /* Put the new overlay on the wrong list. */ | |
1492 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1493 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1494 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1495 | else |
5c4f68f1 | 1496 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1497 | |
1498 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1499 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1500 | |
b61982dd JB |
1501 | /* We don't need to redisplay the region covered by the overlay, because |
1502 | the overlay has no properties at the moment. */ | |
1503 | ||
2eec3b4e RS |
1504 | return overlay; |
1505 | } | |
1506 | ||
5c4f68f1 JB |
1507 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
1508 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
b61982dd | 1509 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.") |
5c4f68f1 JB |
1510 | (overlay, beg, end, buffer) |
1511 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 1512 | { |
5c4f68f1 JB |
1513 | struct buffer *b; |
1514 | ||
52f8ec73 | 1515 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
1516 | if (NILP (buffer)) |
1517 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
1518 | CHECK_BUFFER (buffer, 3); | |
b61982dd JB |
1519 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1520 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
1521 | ||
1522 | if (XINT (beg) > XINT (end)) | |
1523 | { | |
1524 | Lisp_Object temp = beg; | |
1525 | beg = end; end = temp; | |
1526 | } | |
1527 | ||
5c4f68f1 | 1528 | b = XBUFFER (buffer); |
2eec3b4e | 1529 | |
b61982dd JB |
1530 | /* Redisplay the area the overlay has just left, or just enclosed. */ |
1531 | { | |
1532 | Lisp_Object o_beg = OVERLAY_START (overlay); | |
1533 | Lisp_Object o_end = OVERLAY_END (overlay); | |
1534 | int change_beg, change_end; | |
1535 | ||
1536 | o_beg = OVERLAY_POSITION (o_beg); | |
1537 | o_end = OVERLAY_POSITION (o_end); | |
1538 | ||
1539 | if (XINT (o_beg) == XINT (beg)) | |
1540 | redisplay_region (b, XINT (o_end), XINT (end)); | |
1541 | else if (XINT (o_end) == XINT (end)) | |
1542 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
1543 | else | |
1544 | { | |
1545 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
1546 | if (XINT (end) > XINT (o_end)) o_end = end; | |
1547 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
1548 | } | |
1549 | } | |
1550 | ||
5c4f68f1 JB |
1551 | b->overlays_before = Fdelq (overlay, b->overlays_before); |
1552 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
1553 | ||
1554 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
1555 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
1556 | |
1557 | /* Put the overlay on the wrong list. */ | |
1558 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1559 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1560 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1561 | else |
5c4f68f1 | 1562 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1563 | |
1564 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1565 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e RS |
1566 | |
1567 | return overlay; | |
1568 | } | |
1569 | ||
1570 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 1571 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 1572 | (overlay) |
5c4f68f1 | 1573 | Lisp_Object overlay; |
2eec3b4e | 1574 | { |
5c4f68f1 JB |
1575 | struct buffer *b; |
1576 | ||
52f8ec73 JB |
1577 | CHECK_OVERLAY (overlay, 0); |
1578 | ||
1579 | b = XBUFFER (Fmarker_buffer (OVERLAY_START (overlay))); | |
5c4f68f1 JB |
1580 | |
1581 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
1582 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
1583 | ||
52f8ec73 JB |
1584 | Fset_marker (OVERLAY_START (overlay), 1, Qnil); |
1585 | Fset_marker (OVERLAY_END (overlay), 1, Qnil); | |
1586 | ||
b61982dd JB |
1587 | redisplay_region (b, |
1588 | OVERLAY_POSITION (OVERLAY_START (overlay)), | |
1589 | OVERLAY_POSITION (OVERLAY_END (overlay))); | |
1590 | ||
2eec3b4e RS |
1591 | return Qnil; |
1592 | } | |
1593 | \f | |
1594 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, | |
1595 | "Return a list of the overays that contain position POS.") | |
1596 | (pos) | |
1597 | Lisp_Object pos; | |
1598 | { | |
1599 | int noverlays; | |
1600 | int endpos; | |
1601 | Lisp_Object *overlay_vec; | |
1602 | int len; | |
1603 | Lisp_Object result; | |
1604 | ||
1605 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1606 | ||
1607 | len = 10; | |
1608 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1609 | ||
1610 | /* Put all the overlays we want in a vector in overlay_vec. | |
1611 | Store the length in len. */ | |
1612 | noverlays = overlays_at (XINT (pos), &overlay_vec, &len, &endpos); | |
1613 | ||
1614 | /* Make a list of them all. */ | |
1615 | result = Flist (noverlays, overlay_vec); | |
1616 | ||
9ac0d9e0 | 1617 | xfree (overlay_vec); |
2eec3b4e RS |
1618 | return result; |
1619 | } | |
1620 | ||
1621 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
1622 | 1, 1, 0, | |
1623 | "Return the next position after POS where an overlay starts or ends.") | |
1624 | (pos) | |
1625 | Lisp_Object pos; | |
1626 | { | |
1627 | int noverlays; | |
1628 | int endpos; | |
1629 | Lisp_Object *overlay_vec; | |
1630 | int len; | |
1631 | Lisp_Object result; | |
1632 | int i; | |
1633 | ||
1634 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1635 | ||
1636 | len = 10; | |
1637 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1638 | ||
1639 | /* Put all the overlays we want in a vector in overlay_vec. | |
1640 | Store the length in len. | |
1641 | endpos gets the position where the next overlay starts. */ | |
1642 | noverlays = overlays_at (XINT (pos), &overlay_vec, &len, &endpos); | |
1643 | ||
1644 | /* If any of these overlays ends before endpos, | |
1645 | use its ending point instead. */ | |
1646 | for (i = 0; i < noverlays; i++) | |
1647 | { | |
1648 | Lisp_Object oend; | |
1649 | int oendpos; | |
1650 | ||
1651 | oend = OVERLAY_END (overlay_vec[i]); | |
1652 | oendpos = OVERLAY_POSITION (oend); | |
1653 | if (oendpos < endpos) | |
1654 | endpos = oendpos; | |
1ab256cb RM |
1655 | } |
1656 | ||
9ac0d9e0 | 1657 | xfree (overlay_vec); |
2eec3b4e RS |
1658 | return make_number (endpos); |
1659 | } | |
1660 | \f | |
1661 | /* These functions are for debugging overlays. */ | |
1662 | ||
1663 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
1664 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
1665 | The car has all the overlays before the overlay center;\n\ | |
1666 | the cdr has all the overlays before the overlay center.\n\ | |
1667 | Recentering overlays moves overlays between these lists.\n\ | |
1668 | The lists you get are copies, so that changing them has no effect.\n\ | |
1669 | However, the overlays you get are the real objects that the buffer uses.") | |
1670 | () | |
1671 | { | |
1672 | Lisp_Object before, after; | |
1673 | before = current_buffer->overlays_before; | |
1674 | if (CONSP (before)) | |
1675 | before = Fcopy_sequence (before); | |
1676 | after = current_buffer->overlays_after; | |
1677 | if (CONSP (after)) | |
1678 | after = Fcopy_sequence (after); | |
1679 | ||
1680 | return Fcons (before, after); | |
1681 | } | |
1682 | ||
1683 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
1684 | "Recenter the overlays of the current buffer around position POS.") | |
1685 | (pos) | |
1686 | Lisp_Object pos; | |
1687 | { | |
1688 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1689 | ||
5c4f68f1 | 1690 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
1691 | return Qnil; |
1692 | } | |
1693 | \f | |
1694 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
1695 | "Get the property of overlay OVERLAY with property name NAME.") | |
1696 | (overlay, prop) | |
1697 | Lisp_Object overlay, prop; | |
1698 | { | |
1699 | Lisp_Object plist; | |
52f8ec73 JB |
1700 | |
1701 | CHECK_OVERLAY (overlay, 0); | |
1702 | ||
1703 | for (plist = Fcdr_safe (XCONS (overlay)->cdr); | |
2eec3b4e RS |
1704 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
1705 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
1706 | { | |
1707 | if (EQ (XCONS (plist)->car, prop)) | |
1708 | return XCONS (XCONS (plist)->cdr)->car; | |
1709 | } | |
52f8ec73 JB |
1710 | |
1711 | return Qnil; | |
2eec3b4e RS |
1712 | } |
1713 | ||
1714 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
1715 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
1716 | (overlay, prop, value) | |
1717 | Lisp_Object overlay, prop, value; | |
1718 | { | |
1719 | Lisp_Object plist, tail; | |
1720 | ||
52f8ec73 | 1721 | CHECK_OVERLAY (overlay, 0); |
b61982dd JB |
1722 | |
1723 | redisplay_region (XMARKER (OVERLAY_START (overlay))->buffer, | |
1724 | OVERLAY_POSITION (OVERLAY_START (overlay)), | |
1725 | OVERLAY_POSITION (OVERLAY_END (overlay))); | |
1726 | ||
52f8ec73 | 1727 | plist = Fcdr_safe (XCONS (overlay)->cdr); |
2eec3b4e RS |
1728 | |
1729 | for (tail = plist; | |
1730 | CONSP (tail) && CONSP (XCONS (tail)->cdr); | |
1731 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
1732 | { | |
1733 | if (EQ (XCONS (tail)->car, prop)) | |
1734 | return XCONS (XCONS (tail)->cdr)->car = value; | |
1735 | } | |
1736 | ||
1737 | if (! CONSP (XCONS (overlay)->cdr)) | |
1738 | XCONS (overlay)->cdr = Fcons (Qnil, Qnil); | |
1739 | ||
1740 | XCONS (XCONS (overlay)->cdr)->cdr | |
1741 | = Fcons (prop, Fcons (value, plist)); | |
1742 | ||
1743 | return value; | |
1ab256cb RM |
1744 | } |
1745 | \f | |
0fa3ba92 JB |
1746 | /* Somebody has tried to store NEWVAL into the buffer-local slot with |
1747 | offset XUINT (valcontents), and NEWVAL has an unacceptable type. */ | |
1748 | void | |
1749 | buffer_slot_type_mismatch (valcontents, newval) | |
1750 | Lisp_Object valcontents, newval; | |
1751 | { | |
1752 | unsigned int offset = XUINT (valcontents); | |
5fcd022d | 1753 | unsigned char *symbol_name = |
0fa3ba92 JB |
1754 | (XSYMBOL (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
1755 | ->name->data); | |
1756 | char *type_name; | |
1757 | ||
1758 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) | |
1759 | { | |
1760 | case Lisp_Int: type_name = "integers"; break; | |
1761 | case Lisp_String: type_name = "strings"; break; | |
1762 | case Lisp_Marker: type_name = "markers"; break; | |
1763 | case Lisp_Symbol: type_name = "symbols"; break; | |
1764 | case Lisp_Cons: type_name = "lists"; break; | |
5fcd022d | 1765 | case Lisp_Vector: type_name = "vectors"; break; |
0fa3ba92 JB |
1766 | default: |
1767 | abort (); | |
1768 | } | |
1769 | ||
1770 | error ("only %s should be stored in the buffer-local variable %s", | |
1771 | type_name, symbol_name); | |
1772 | } | |
1773 | \f | |
1ab256cb RM |
1774 | init_buffer_once () |
1775 | { | |
1776 | register Lisp_Object tem; | |
1777 | ||
1778 | /* Make sure all markable slots in buffer_defaults | |
1779 | are initialized reasonably, so mark_buffer won't choke. */ | |
1780 | reset_buffer (&buffer_defaults); | |
1781 | reset_buffer (&buffer_local_symbols); | |
1782 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); | |
1783 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); | |
1784 | ||
1785 | /* Set up the default values of various buffer slots. */ | |
1786 | /* Must do these before making the first buffer! */ | |
1787 | ||
1788 | /* real setup is done in loaddefs.el */ | |
1789 | buffer_defaults.mode_line_format = build_string ("%-"); | |
1790 | buffer_defaults.abbrev_mode = Qnil; | |
1791 | buffer_defaults.overwrite_mode = Qnil; | |
1792 | buffer_defaults.case_fold_search = Qt; | |
1793 | buffer_defaults.auto_fill_function = Qnil; | |
1794 | buffer_defaults.selective_display = Qnil; | |
1795 | #ifndef old | |
1796 | buffer_defaults.selective_display_ellipses = Qt; | |
1797 | #endif | |
1798 | buffer_defaults.abbrev_table = Qnil; | |
1799 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 1800 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 1801 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
1802 | buffer_defaults.overlays_before = Qnil; |
1803 | buffer_defaults.overlays_after = Qnil; | |
1804 | XFASTINT (buffer_defaults.overlay_center) = 1; | |
1ab256cb RM |
1805 | |
1806 | XFASTINT (buffer_defaults.tab_width) = 8; | |
1807 | buffer_defaults.truncate_lines = Qnil; | |
1808 | buffer_defaults.ctl_arrow = Qt; | |
1809 | ||
1810 | XFASTINT (buffer_defaults.fill_column) = 70; | |
1811 | XFASTINT (buffer_defaults.left_margin) = 0; | |
1812 | ||
1813 | /* Assign the local-flags to the slots that have default values. | |
1814 | The local flag is a bit that is used in the buffer | |
1815 | to say that it has its own local value for the slot. | |
1816 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
1817 | ||
1818 | /* Nothing can work if this isn't true */ | |
1819 | if (sizeof (int) != sizeof (Lisp_Object)) abort (); | |
1820 | ||
1821 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
1822 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
1823 | XFASTINT (buffer_local_flags.filename) = -1; | |
1824 | XFASTINT (buffer_local_flags.directory) = -1; | |
1825 | XFASTINT (buffer_local_flags.backed_up) = -1; | |
1826 | XFASTINT (buffer_local_flags.save_length) = -1; | |
1827 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; | |
1828 | XFASTINT (buffer_local_flags.read_only) = -1; | |
1829 | XFASTINT (buffer_local_flags.major_mode) = -1; | |
1830 | XFASTINT (buffer_local_flags.mode_name) = -1; | |
1831 | XFASTINT (buffer_local_flags.undo_list) = -1; | |
c48f61ef | 1832 | XFASTINT (buffer_local_flags.mark_active) = -1; |
1ab256cb RM |
1833 | |
1834 | XFASTINT (buffer_local_flags.mode_line_format) = 1; | |
1835 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; | |
1836 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; | |
1837 | XFASTINT (buffer_local_flags.case_fold_search) = 8; | |
1838 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; | |
1839 | XFASTINT (buffer_local_flags.selective_display) = 0x20; | |
1840 | #ifndef old | |
1841 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; | |
1842 | #endif | |
1843 | XFASTINT (buffer_local_flags.tab_width) = 0x80; | |
1844 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; | |
1845 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; | |
1846 | XFASTINT (buffer_local_flags.fill_column) = 0x400; | |
1847 | XFASTINT (buffer_local_flags.left_margin) = 0x800; | |
1848 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; | |
1849 | XFASTINT (buffer_local_flags.display_table) = 0x2000; | |
1ab256cb RM |
1850 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
1851 | ||
1852 | Vbuffer_alist = Qnil; | |
1853 | current_buffer = 0; | |
1854 | all_buffers = 0; | |
1855 | ||
1856 | QSFundamental = build_string ("Fundamental"); | |
1857 | ||
1858 | Qfundamental_mode = intern ("fundamental-mode"); | |
1859 | buffer_defaults.major_mode = Qfundamental_mode; | |
1860 | ||
1861 | Qmode_class = intern ("mode-class"); | |
1862 | ||
1863 | Qprotected_field = intern ("protected-field"); | |
1864 | ||
1865 | Qpermanent_local = intern ("permanent-local"); | |
1866 | ||
1867 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
1868 | ||
1869 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
1870 | /* super-magic invisible buffer */ | |
1871 | Vbuffer_alist = Qnil; | |
1872 | ||
ffd56f97 | 1873 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
1874 | } |
1875 | ||
1876 | init_buffer () | |
1877 | { | |
1878 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
1879 | char *pwd; |
1880 | struct stat dotstat, pwdstat; | |
1ab256cb RM |
1881 | |
1882 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
1883 | |
1884 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
1885 | when PWD is right, and may avoid a fatal error. */ | |
1886 | if ((pwd = getenv ("PWD")) != 0 && *pwd == '/' | |
1887 | && stat (pwd, &pwdstat) == 0 | |
1888 | && stat (".", &dotstat) == 0 | |
1889 | && dotstat.st_ino == pwdstat.st_ino | |
1890 | && dotstat.st_dev == pwdstat.st_dev | |
1891 | && strlen (pwd) < MAXPATHLEN) | |
1892 | strcpy (buf, pwd); | |
1893 | else if (getwd (buf) == 0) | |
1ab256cb RM |
1894 | fatal ("`getwd' failed: %s.\n", buf); |
1895 | ||
1896 | #ifndef VMS | |
1897 | /* Maybe this should really use some standard subroutine | |
1898 | whose definition is filename syntax dependent. */ | |
1899 | if (buf[strlen (buf) - 1] != '/') | |
1900 | strcat (buf, "/"); | |
1901 | #endif /* not VMS */ | |
1902 | current_buffer->directory = build_string (buf); | |
1903 | } | |
1904 | ||
1905 | /* initialize the buffer routines */ | |
1906 | syms_of_buffer () | |
1907 | { | |
188d4d11 RM |
1908 | extern Lisp_Object Qdisabled; |
1909 | ||
1ab256cb RM |
1910 | staticpro (&Vbuffer_defaults); |
1911 | staticpro (&Vbuffer_local_symbols); | |
1912 | staticpro (&Qfundamental_mode); | |
1913 | staticpro (&Qmode_class); | |
1914 | staticpro (&QSFundamental); | |
1915 | staticpro (&Vbuffer_alist); | |
1916 | staticpro (&Qprotected_field); | |
1917 | staticpro (&Qpermanent_local); | |
1918 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 JB |
1919 | staticpro (&Qoverlayp); |
1920 | ||
1921 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
1922 | |
1923 | Fput (Qprotected_field, Qerror_conditions, | |
1924 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
1925 | Fput (Qprotected_field, Qerror_message, | |
1926 | build_string ("Attempt to modify a protected field")); | |
1927 | ||
188d4d11 RM |
1928 | Fput (intern ("erase-buffer"), Qdisabled, Qt); |
1929 | ||
1ab256cb RM |
1930 | /* All these use DEFVAR_LISP_NOPRO because the slots in |
1931 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
1932 | ||
1933 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
1934 | &buffer_defaults.mode_line_format, | |
1935 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
1936 | This is the same as (default-value 'mode-line-format)."); | |
1937 | ||
1938 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
1939 | &buffer_defaults.abbrev_mode, | |
1940 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
1941 | This is the same as (default-value 'abbrev-mode)."); | |
1942 | ||
1943 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
1944 | &buffer_defaults.ctl_arrow, | |
1945 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
1946 | This is the same as (default-value 'ctl-arrow)."); | |
1947 | ||
1948 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
1949 | &buffer_defaults.truncate_lines, | |
1950 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
1951 | This is the same as (default-value 'truncate-lines)."); | |
1952 | ||
1953 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
1954 | &buffer_defaults.fill_column, | |
1955 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
1956 | This is the same as (default-value 'fill-column)."); | |
1957 | ||
1958 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
1959 | &buffer_defaults.left_margin, | |
1960 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
1961 | This is the same as (default-value 'left-margin)."); | |
1962 | ||
1963 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
1964 | &buffer_defaults.tab_width, | |
1965 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
1966 | This is the same as (default-value 'tab-width)."); | |
1967 | ||
1968 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
1969 | &buffer_defaults.case_fold_search, | |
1970 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
1971 | This is the same as (default-value 'case-fold-search)."); | |
1972 | ||
0fa3ba92 JB |
1973 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
1974 | Qnil, 0); | |
1ab256cb RM |
1975 | |
1976 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
1977 | But make-docfile finds it! | |
1978 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 1979 | Qnil, |
1ab256cb RM |
1980 | "Template for displaying mode line for current buffer.\n\ |
1981 | Each buffer has its own value of this variable.\n\ | |
1982 | Value may be a string, a symbol or a list or cons cell.\n\ | |
1983 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
1984 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
1985 | in that the %-constructs below are not recognized.\n\ | |
1986 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
1987 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
1988 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
1989 | For a list whose car is a string or list, each element is processed\n\ | |
1990 | recursively and the results are effectively concatenated.\n\ | |
1991 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
1992 | and padded (if the number is positive) or truncated (if negative)\n\ | |
1993 | to the width specified by that number.\n\ | |
1994 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
1995 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
1996 | or when it is found in a cons-cell or a list)\n\ | |
1997 | %b -- print buffer name. %f -- print visited file name.\n\ | |
1998 | %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\ | |
a97c374a | 1999 | %s -- print process status. %l -- print the current line number.\n\ |
1ab256cb RM |
2000 | %p -- print percent of buffer above top of window, or top, bot or all.\n\ |
2001 | %n -- print Narrow if appropriate.\n\ | |
2002 | %[ -- print one [ for each recursive editing level. %] similar.\n\ | |
2003 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2004 | Decimal digits after the % specify field width to which to pad."); | |
2005 | */ | |
2006 | ||
2007 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2008 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2009 | nil here means use current buffer's major mode."); | |
2010 | ||
2011 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2012 | make_number (Lisp_Symbol), |
1ab256cb RM |
2013 | "Symbol for current buffer's major mode."); |
2014 | ||
2015 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2016 | make_number (Lisp_String), |
1ab256cb RM |
2017 | "Pretty name of current buffer's major mode (a string)."); |
2018 | ||
0fa3ba92 | 2019 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2020 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2021 | Automatically becomes buffer-local when set in any fashion."); | |
2022 | ||
2023 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2024 | Qnil, |
1ab256cb RM |
2025 | "*Non-nil if searches should ignore case.\n\ |
2026 | Automatically becomes buffer-local when set in any fashion."); | |
2027 | ||
2028 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2029 | make_number (Lisp_Int), |
1ab256cb RM |
2030 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2031 | Automatically becomes buffer-local when set in any fashion."); | |
2032 | ||
2033 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2034 | make_number (Lisp_Int), |
1ab256cb RM |
2035 | "*Column for the default indent-line-function to indent to.\n\ |
2036 | Linefeed indents to this column in Fundamental mode.\n\ | |
2037 | Automatically becomes buffer-local when set in any fashion."); | |
2038 | ||
2039 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2040 | make_number (Lisp_Int), |
1ab256cb RM |
2041 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2042 | Automatically becomes buffer-local when set in any fashion."); | |
2043 | ||
0fa3ba92 | 2044 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2045 | "*Non-nil means display control chars with uparrow.\n\ |
2046 | Nil means use backslash and octal digits.\n\ | |
2047 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2048 | This variable does not apply to characters whose display is specified\n\ | |
2049 | in the current display table (if there is one)."); | |
2050 | ||
0fa3ba92 | 2051 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2052 | "*Non-nil means do not display continuation lines;\n\ |
2053 | give each line of text one screen line.\n\ | |
2054 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2055 | \n\ | |
2056 | Note that this is overridden by the variable\n\ | |
2057 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2058 | and this buffer is not full-frame width."); |
1ab256cb RM |
2059 | |
2060 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, | |
0fa3ba92 | 2061 | make_number (Lisp_String), |
1ab256cb RM |
2062 | "Name of default directory of current buffer. Should end with slash.\n\ |
2063 | Each buffer has its own value of this variable."); | |
2064 | ||
2065 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 2066 | Qnil, |
1ab256cb RM |
2067 | "Function called (if non-nil) to perform auto-fill.\n\ |
2068 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
2069 | Each buffer has its own value of this variable.\n\ | |
2070 | NOTE: This variable is not an ordinary hook;\n\ | |
2071 | It may not be a list of functions."); | |
2072 | ||
2073 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 2074 | make_number (Lisp_String), |
1ab256cb RM |
2075 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
2076 | Each buffer has its own value of this variable."); | |
2077 | ||
2078 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 2079 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 2080 | make_number (Lisp_String), |
1ab256cb RM |
2081 | "Name of file for auto-saving current buffer,\n\ |
2082 | or nil if buffer should not be auto-saved.\n\ | |
2083 | Each buffer has its own value of this variable."); | |
2084 | ||
0fa3ba92 | 2085 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
2086 | "Non-nil if this buffer is read-only.\n\ |
2087 | Each buffer has its own value of this variable."); | |
2088 | ||
0fa3ba92 | 2089 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
2090 | "Non-nil if this buffer's file has been backed up.\n\ |
2091 | Backing up is done before the first time the file is saved.\n\ | |
2092 | Each buffer has its own value of this variable."); | |
2093 | ||
2094 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 2095 | make_number (Lisp_Int), |
1ab256cb RM |
2096 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
2097 | 0 initially.\n\ | |
2098 | Each buffer has its own value of this variable."); | |
2099 | ||
2100 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 2101 | Qnil, |
1ab256cb RM |
2102 | "Non-nil enables selective display:\n\ |
2103 | Integer N as value means display only lines\n\ | |
2104 | that start with less than n columns of space.\n\ | |
2105 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
2106 | Then ^M's in the file are written into files as newlines.\n\n\ | |
2107 | Automatically becomes buffer-local when set in any fashion."); | |
2108 | ||
2109 | #ifndef old | |
2110 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
2111 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 2112 | Qnil, |
1ab256cb RM |
2113 | "t means display ... on previous line when a line is invisible.\n\ |
2114 | Automatically becomes buffer-local when set in any fashion."); | |
2115 | #endif | |
2116 | ||
0fa3ba92 | 2117 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 2118 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
2119 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
2120 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 2121 | until the tab is filled in.\n\ |
6bbb0d4a | 2122 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
2123 | Automatically becomes buffer-local when set in any fashion."); |
2124 | ||
2125 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
5d305367 | 2126 | Qnil, |
1ab256cb RM |
2127 | "Display table that controls display of the contents of current buffer.\n\ |
2128 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2129 | The display table is a vector created with `make-display-table'.\n\ | |
2130 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 2131 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 2132 | nil means display the character in the default fashion.\n\ |
6158b3b0 JB |
2133 | The remaining five elements control the display of\n\ |
2134 | the end of a truncated screen line (element 256, a single character);\n\ | |
2135 | the end of a continued line (element 257, a single character);\n\ | |
2136 | the escape character used to display character codes in octal\n\ | |
2137 | (element 258, a single character);\n\ | |
2138 | the character used as an arrow for control characters (element 259,\n\ | |
2139 | a single character);\n\ | |
2140 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
2141 | a vector of characters).\n\ | |
1ab256cb RM |
2142 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
2143 | Each window can have its own, overriding display table."); | |
2144 | ||
1ab256cb RM |
2145 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
2146 | "Don't ask."); | |
2147 | */ | |
01050cb5 | 2148 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
2149 | "Function to call before each text change.\n\ |
2150 | Two arguments are passed to the function: the positions of\n\ | |
2151 | the beginning and end of the range of old text to be changed.\n\ | |
2152 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2153 | No information is given about the length of the text after the change.\n\ | |
2154 | position of the change\n\ | |
2155 | \n\ | |
2156 | While executing the `before-change-function', changes to buffers do not\n\ | |
2157 | cause calls to any `before-change-function' or `after-change-function'."); | |
2158 | Vbefore_change_function = Qnil; | |
2159 | ||
2160 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
2161 | "Function to call after each text change.\n\ | |
2162 | Three arguments are passed to the function: the positions of\n\ | |
2163 | the beginning and end of the range of changed text,\n\ | |
2164 | and the length of the pre-change text replaced by that range.\n\ | |
2165 | \(For an insertion, the pre-change length is zero;\n\ | |
2166 | for a deletion, that length is the number of characters deleted,\n\ | |
2167 | and the post-change beginning and end are at the same place.)\n\ | |
2168 | \n\ | |
2169 | While executing the `after-change-function', changes to buffers do not\n\ | |
2170 | cause calls to any `before-change-function' or `after-change-function'."); | |
2171 | Vafter_change_function = Qnil; | |
2172 | ||
dbc4e1c1 JB |
2173 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
2174 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
2175 | The functions are run using the `run-hooks' function."); | |
2176 | Vfirst_change_hook = Qnil; | |
2177 | Qfirst_change_hook = intern ("first-change-hook"); | |
2178 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 2179 | |
3f5fcd47 | 2180 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
2181 | "List of undo entries in current buffer.\n\ |
2182 | Recent changes come first; older changes follow newer.\n\ | |
2183 | \n\ | |
2184 | An entry (START . END) represents an insertion which begins at\n\ | |
2185 | position START and ends at position END.\n\ | |
2186 | \n\ | |
2187 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
2188 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
2189 | of the text being deleted; if negative, point was at the end.\n\ | |
2190 | \n\ | |
2191 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
2192 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
2193 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
2194 | modification count of the most recent save is different, this entry is\n\ | |
2195 | obsolete.\n\ | |
2196 | \n\ | |
483c1fd3 RS |
2197 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
2198 | was modified between BEG and END. PROP is the property name,\n\ | |
2199 | and VAL is the old value.\n\ | |
2200 | \n\ | |
bec44fd6 JB |
2201 | An entry of the form POSITION indicates that point was at the buffer\n\ |
2202 | location given by the integer. Undoing an entry of this form places\n\ | |
2203 | point at POSITION.\n\ | |
2204 | \n\ | |
1ab256cb RM |
2205 | nil marks undo boundaries. The undo command treats the changes\n\ |
2206 | between two undo boundaries as a single step to be undone.\n\ | |
2207 | \n\ | |
bec44fd6 | 2208 | If the value of the variable is t, undo information is not recorded."); |
1ab256cb | 2209 | |
c48f61ef RS |
2210 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
2211 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
2212 | Automatically local in all buffers."); | |
2213 | ||
2214 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, | |
2215 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
2216 | Vtransient_mark_mode = Qnil; | |
2217 | ||
1ab256cb RM |
2218 | defsubr (&Sbuffer_list); |
2219 | defsubr (&Sget_buffer); | |
2220 | defsubr (&Sget_file_buffer); | |
2221 | defsubr (&Sget_buffer_create); | |
01050cb5 | 2222 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
2223 | defsubr (&Sbuffer_name); |
2224 | /*defsubr (&Sbuffer_number);*/ | |
2225 | defsubr (&Sbuffer_file_name); | |
2226 | defsubr (&Sbuffer_local_variables); | |
2227 | defsubr (&Sbuffer_modified_p); | |
2228 | defsubr (&Sset_buffer_modified_p); | |
2229 | defsubr (&Sbuffer_modified_tick); | |
2230 | defsubr (&Srename_buffer); | |
2231 | defsubr (&Sother_buffer); | |
2232 | defsubr (&Sbuffer_disable_undo); | |
2233 | defsubr (&Sbuffer_enable_undo); | |
2234 | defsubr (&Skill_buffer); | |
2235 | defsubr (&Serase_buffer); | |
2236 | defsubr (&Sswitch_to_buffer); | |
2237 | defsubr (&Spop_to_buffer); | |
2238 | defsubr (&Scurrent_buffer); | |
2239 | defsubr (&Sset_buffer); | |
2240 | defsubr (&Sbarf_if_buffer_read_only); | |
2241 | defsubr (&Sbury_buffer); | |
2242 | defsubr (&Slist_buffers); | |
2243 | defsubr (&Skill_all_local_variables); | |
2eec3b4e | 2244 | |
52f8ec73 | 2245 | defsubr (&Soverlayp); |
2eec3b4e RS |
2246 | defsubr (&Smake_overlay); |
2247 | defsubr (&Sdelete_overlay); | |
2248 | defsubr (&Smove_overlay); | |
2249 | defsubr (&Soverlays_at); | |
2250 | defsubr (&Snext_overlay_change); | |
2251 | defsubr (&Soverlay_recenter); | |
2252 | defsubr (&Soverlay_lists); | |
2253 | defsubr (&Soverlay_get); | |
2254 | defsubr (&Soverlay_put); | |
1ab256cb RM |
2255 | } |
2256 | ||
2257 | keys_of_buffer () | |
2258 | { | |
2259 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
2260 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
2261 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
2262 | } |