Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
4158c17d | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994 |
c922bc55 | 3 | Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
c922bc55 | 9 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
2381d133 JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
1ab256cb RM |
24 | #include <sys/param.h> |
25 | ||
26 | #ifndef MAXPATHLEN | |
27 | /* in 4.1, param.h fails to define this. */ | |
28 | #define MAXPATHLEN 1024 | |
29 | #endif /* not MAXPATHLEN */ | |
30 | ||
18160b98 | 31 | #include <config.h> |
1ab256cb | 32 | #include "lisp.h" |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
36 | #include "buffer.h" | |
1ab256cb | 37 | #include "indent.h" |
d014bf88 | 38 | #include "blockinput.h" |
1ab256cb RM |
39 | |
40 | struct buffer *current_buffer; /* the current buffer */ | |
41 | ||
42 | /* First buffer in chain of all buffers (in reverse order of creation). | |
43 | Threaded through ->next. */ | |
44 | ||
45 | struct buffer *all_buffers; | |
46 | ||
47 | /* This structure holds the default values of the buffer-local variables | |
48 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
49 | The default value occupies the same slot in this structure | |
50 | as an individual buffer's value occupies in that buffer. | |
51 | Setting the default value also goes through the alist of buffers | |
52 | and stores into each buffer that does not say it has a local value. */ | |
53 | ||
54 | struct buffer buffer_defaults; | |
55 | ||
56 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
57 | ||
58 | static Lisp_Object Vbuffer_defaults; | |
59 | ||
60 | /* This structure marks which slots in a buffer have corresponding | |
61 | default values in buffer_defaults. | |
62 | Each such slot has a nonzero value in this structure. | |
63 | The value has only one nonzero bit. | |
64 | ||
65 | When a buffer has its own local value for a slot, | |
66 | the bit for that slot (found in the same slot in this structure) | |
67 | is turned on in the buffer's local_var_flags slot. | |
68 | ||
69 | If a slot in this structure is -1, then even though there may | |
70 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
71 | and the corresponding slot in buffer_defaults is not used. | |
72 | ||
73 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
74 | but there is a default value which is copied into each buffer. | |
75 | ||
76 | If a slot in this structure is negative, then even though there may | |
77 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
78 | and the corresponding slot in buffer_defaults is not used. | |
79 | ||
80 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
81 | zero, that is a bug */ | |
82 | ||
83 | struct buffer buffer_local_flags; | |
84 | ||
85 | /* This structure holds the names of symbols whose values may be | |
86 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
87 | ||
88 | struct buffer buffer_local_symbols; | |
89 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
90 | static Lisp_Object Vbuffer_local_symbols; | |
91 | ||
0fa3ba92 JB |
92 | /* This structure holds the required types for the values in the |
93 | buffer-local slots. If a slot contains Qnil, then the | |
94 | corresponding buffer slot may contain a value of any type. If a | |
95 | slot contains an integer, then prospective values' tags must be | |
96 | equal to that integer. When a tag does not match, the function | |
97 | buffer_slot_type_mismatch will signal an error. */ | |
98 | struct buffer buffer_local_types; | |
99 | ||
1ab256cb | 100 | Lisp_Object Fset_buffer (); |
01050cb5 | 101 | void set_buffer_internal (); |
173f2a64 | 102 | static void call_overlay_mod_hooks (); |
1ab256cb RM |
103 | |
104 | /* Alist of all buffer names vs the buffers. */ | |
105 | /* This used to be a variable, but is no longer, | |
106 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
107 | Lisp_Object Vbuffer_alist; | |
108 | ||
109 | /* Functions to call before and after each text change. */ | |
110 | Lisp_Object Vbefore_change_function; | |
111 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
112 | Lisp_Object Vbefore_change_functions; |
113 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 114 | |
c48f61ef RS |
115 | Lisp_Object Vtransient_mark_mode; |
116 | ||
a96b68f1 RS |
117 | /* t means ignore all read-only text properties. |
118 | A list means ignore such a property if its value is a member of the list. | |
119 | Any non-nil value means ignore buffer-read-only. */ | |
120 | Lisp_Object Vinhibit_read_only; | |
121 | ||
dcdffbf6 RS |
122 | /* List of functions to call that can query about killing a buffer. |
123 | If any of these functions returns nil, we don't kill it. */ | |
124 | Lisp_Object Vkill_buffer_query_functions; | |
125 | ||
dbc4e1c1 JB |
126 | /* List of functions to call before changing an unmodified buffer. */ |
127 | Lisp_Object Vfirst_change_hook; | |
128 | Lisp_Object Qfirst_change_hook; | |
1ab256cb RM |
129 | |
130 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
131 | ||
132 | Lisp_Object Qprotected_field; | |
133 | ||
134 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
135 | ||
136 | Lisp_Object Qkill_buffer_hook; | |
137 | ||
5fe0b67e RS |
138 | Lisp_Object Qget_file_buffer; |
139 | ||
52f8ec73 JB |
140 | Lisp_Object Qoverlayp; |
141 | ||
5985d248 KH |
142 | Lisp_Object Qpriority, Qwindow; |
143 | ||
294d215f RS |
144 | Lisp_Object Qmodification_hooks; |
145 | Lisp_Object Qinsert_in_front_hooks; | |
146 | Lisp_Object Qinsert_behind_hooks; | |
147 | ||
1ab256cb RM |
148 | /* For debugging; temporary. See set_buffer_internal. */ |
149 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
150 | ||
151 | nsberror (spec) | |
152 | Lisp_Object spec; | |
153 | { | |
154 | if (XTYPE (spec) == Lisp_String) | |
155 | error ("No buffer named %s", XSTRING (spec)->data); | |
156 | error ("Invalid buffer argument"); | |
157 | } | |
158 | \f | |
159 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
160 | "Return a list of all existing live buffers.") | |
161 | () | |
162 | { | |
163 | return Fmapcar (Qcdr, Vbuffer_alist); | |
164 | } | |
165 | ||
166 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, | |
167 | "Return the buffer named NAME (a string).\n\ | |
168 | If there is no live buffer named NAME, return nil.\n\ | |
169 | NAME may also be a buffer; if so, the value is that buffer.") | |
170 | (name) | |
171 | register Lisp_Object name; | |
172 | { | |
173 | if (XTYPE (name) == Lisp_Buffer) | |
174 | return name; | |
175 | CHECK_STRING (name, 0); | |
176 | ||
177 | return Fcdr (Fassoc (name, Vbuffer_alist)); | |
178 | } | |
179 | ||
180 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
181 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 182 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
1ab256cb RM |
183 | If there is no such live buffer, return nil.") |
184 | (filename) | |
185 | register Lisp_Object filename; | |
186 | { | |
187 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
188 | Lisp_Object handler; |
189 | ||
1ab256cb RM |
190 | CHECK_STRING (filename, 0); |
191 | filename = Fexpand_file_name (filename, Qnil); | |
192 | ||
5fe0b67e RS |
193 | /* If the file name has special constructs in it, |
194 | call the corresponding file handler. */ | |
a617e913 | 195 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
196 | if (!NILP (handler)) |
197 | return call2 (handler, Qget_file_buffer, filename); | |
198 | ||
1ab256cb RM |
199 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
200 | { | |
201 | buf = Fcdr (XCONS (tail)->car); | |
202 | if (XTYPE (buf) != Lisp_Buffer) continue; | |
203 | if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue; | |
204 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); | |
265a9e55 | 205 | if (!NILP (tem)) |
1ab256cb RM |
206 | return buf; |
207 | } | |
208 | return Qnil; | |
209 | } | |
210 | ||
211 | /* Incremented for each buffer created, to assign the buffer number. */ | |
212 | int buffer_count; | |
213 | ||
214 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
215 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
216 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 217 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
218 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
219 | The value is never nil.") | |
220 | (name) | |
221 | register Lisp_Object name; | |
222 | { | |
223 | register Lisp_Object buf, function, tem; | |
224 | int count = specpdl_ptr - specpdl; | |
225 | register struct buffer *b; | |
226 | ||
227 | buf = Fget_buffer (name); | |
265a9e55 | 228 | if (!NILP (buf)) |
1ab256cb RM |
229 | return buf; |
230 | ||
31cd83e9 KH |
231 | if (XSTRING (name)->size == 0) |
232 | error ("Empty string for buffer name is not allowed"); | |
233 | ||
9ac0d9e0 | 234 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb RM |
235 | |
236 | BUF_GAP_SIZE (b) = 20; | |
9ac0d9e0 | 237 | BLOCK_INPUT; |
1ab256cb | 238 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 239 | UNBLOCK_INPUT; |
1ab256cb RM |
240 | if (! BUF_BEG_ADDR (b)) |
241 | memory_full (); | |
242 | ||
243 | BUF_PT (b) = 1; | |
244 | BUF_GPT (b) = 1; | |
245 | BUF_BEGV (b) = 1; | |
246 | BUF_ZV (b) = 1; | |
247 | BUF_Z (b) = 1; | |
248 | BUF_MODIFF (b) = 1; | |
249 | ||
250 | /* Put this on the chain of all buffers including killed ones. */ | |
251 | b->next = all_buffers; | |
252 | all_buffers = b; | |
253 | ||
254 | b->mark = Fmake_marker (); | |
255 | /*b->number = make_number (++buffer_count);*/ | |
256 | b->name = name; | |
257 | if (XSTRING (name)->data[0] != ' ') | |
258 | b->undo_list = Qnil; | |
259 | else | |
260 | b->undo_list = Qt; | |
261 | ||
262 | reset_buffer (b); | |
263 | ||
264 | /* Put this in the alist of all live buffers. */ | |
265 | XSET (buf, Lisp_Buffer, b); | |
266 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
267 | ||
268 | b->mark = Fmake_marker (); | |
269 | b->markers = Qnil; | |
270 | b->name = name; | |
271 | ||
272 | function = buffer_defaults.major_mode; | |
265a9e55 | 273 | if (NILP (function)) |
1ab256cb RM |
274 | { |
275 | tem = Fget (current_buffer->major_mode, Qmode_class); | |
276 | if (EQ (tem, Qnil)) | |
277 | function = current_buffer->major_mode; | |
278 | } | |
279 | ||
265a9e55 | 280 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1ab256cb RM |
281 | return buf; |
282 | ||
283 | /* To select a nonfundamental mode, | |
284 | select the buffer temporarily and then call the mode function. */ | |
285 | ||
286 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
287 | ||
288 | Fset_buffer (buf); | |
289 | call0 (function); | |
290 | ||
291 | return unbind_to (count, buf); | |
292 | } | |
293 | ||
294 | /* Reinitialize everything about a buffer except its name and contents. */ | |
295 | ||
296 | void | |
297 | reset_buffer (b) | |
298 | register struct buffer *b; | |
299 | { | |
300 | b->filename = Qnil; | |
301 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; | |
302 | b->modtime = 0; | |
303 | b->save_modified = 1; | |
291026b5 | 304 | XFASTINT (b->save_length) = 0; |
1ab256cb RM |
305 | b->last_window_start = 1; |
306 | b->backed_up = Qnil; | |
307 | b->auto_save_modified = 0; | |
84f6bcba | 308 | b->auto_save_failure_time = -1; |
1ab256cb RM |
309 | b->auto_save_file_name = Qnil; |
310 | b->read_only = Qnil; | |
2eec3b4e RS |
311 | b->overlays_before = Qnil; |
312 | b->overlays_after = Qnil; | |
313 | XFASTINT (b->overlay_center) = 1; | |
dfda7a7f | 314 | b->mark_active = Qnil; |
33f7013e JA |
315 | |
316 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
317 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
318 | ||
1ab256cb RM |
319 | reset_buffer_local_variables(b); |
320 | } | |
321 | ||
c48f61ef | 322 | reset_buffer_local_variables (b) |
1ab256cb RM |
323 | register struct buffer *b; |
324 | { | |
325 | register int offset; | |
326 | ||
327 | /* Reset the major mode to Fundamental, together with all the | |
328 | things that depend on the major mode. | |
329 | default-major-mode is handled at a higher level. | |
330 | We ignore it here. */ | |
331 | b->major_mode = Qfundamental_mode; | |
332 | b->keymap = Qnil; | |
333 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
334 | b->mode_name = QSFundamental; | |
335 | b->minor_modes = Qnil; | |
336 | b->downcase_table = Vascii_downcase_table; | |
337 | b->upcase_table = Vascii_upcase_table; | |
e9edf33c RS |
338 | b->case_canon_table = Vascii_canon_table; |
339 | b->case_eqv_table = Vascii_eqv_table; | |
1ab256cb RM |
340 | #if 0 |
341 | b->sort_table = XSTRING (Vascii_sort_table); | |
342 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
343 | #endif /* 0 */ | |
344 | ||
345 | /* Reset all per-buffer variables to their defaults. */ | |
346 | b->local_var_alist = Qnil; | |
347 | b->local_var_flags = 0; | |
348 | ||
349 | /* For each slot that has a default value, | |
350 | copy that into the slot. */ | |
351 | ||
352 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
353 | offset < sizeof (struct buffer); | |
354 | offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */ | |
355 | if (*(int *)(offset + (char *) &buffer_local_flags) > 0 | |
356 | || *(int *)(offset + (char *) &buffer_local_flags) == -2) | |
357 | *(Lisp_Object *)(offset + (char *)b) = | |
358 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
359 | } | |
360 | ||
01050cb5 RM |
361 | /* We split this away from generate-new-buffer, because rename-buffer |
362 | and set-visited-file-name ought to be able to use this to really | |
363 | rename the buffer properly. */ | |
364 | ||
365 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 366 | 1, 2, 0, |
01050cb5 RM |
367 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
368 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 369 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 370 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 371 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 372 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 373 | even if a buffer with that name exists.") |
c273e647 RS |
374 | (name, ignore) |
375 | register Lisp_Object name, ignore; | |
1ab256cb RM |
376 | { |
377 | register Lisp_Object gentemp, tem; | |
378 | int count; | |
379 | char number[10]; | |
380 | ||
381 | CHECK_STRING (name, 0); | |
382 | ||
383 | tem = Fget_buffer (name); | |
265a9e55 | 384 | if (NILP (tem)) |
01050cb5 | 385 | return name; |
1ab256cb RM |
386 | |
387 | count = 1; | |
388 | while (1) | |
389 | { | |
390 | sprintf (number, "<%d>", ++count); | |
391 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 392 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
393 | if (!NILP (tem)) |
394 | return gentemp; | |
1ab256cb | 395 | tem = Fget_buffer (gentemp); |
265a9e55 | 396 | if (NILP (tem)) |
01050cb5 | 397 | return gentemp; |
1ab256cb RM |
398 | } |
399 | } | |
400 | ||
401 | \f | |
402 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
403 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 404 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
405 | (buffer) |
406 | register Lisp_Object buffer; | |
407 | { | |
265a9e55 | 408 | if (NILP (buffer)) |
1ab256cb RM |
409 | return current_buffer->name; |
410 | CHECK_BUFFER (buffer, 0); | |
411 | return XBUFFER (buffer)->name; | |
412 | } | |
413 | ||
414 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
415 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
416 | No argument or nil as argument means use the current buffer.") | |
417 | (buffer) | |
418 | register Lisp_Object buffer; | |
419 | { | |
265a9e55 | 420 | if (NILP (buffer)) |
1ab256cb RM |
421 | return current_buffer->filename; |
422 | CHECK_BUFFER (buffer, 0); | |
423 | return XBUFFER (buffer)->filename; | |
424 | } | |
425 | ||
426 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, | |
427 | Sbuffer_local_variables, 0, 1, 0, | |
428 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
429 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
430 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
431 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
432 | No argument or nil as argument means use current buffer as BUFFER.") | |
433 | (buffer) | |
434 | register Lisp_Object buffer; | |
435 | { | |
436 | register struct buffer *buf; | |
553defa4 | 437 | register Lisp_Object result; |
1ab256cb | 438 | |
265a9e55 | 439 | if (NILP (buffer)) |
1ab256cb RM |
440 | buf = current_buffer; |
441 | else | |
442 | { | |
443 | CHECK_BUFFER (buffer, 0); | |
444 | buf = XBUFFER (buffer); | |
445 | } | |
446 | ||
553defa4 RS |
447 | result = Qnil; |
448 | ||
1ab256cb RM |
449 | { |
450 | /* Reference each variable in the alist in our current buffer. | |
451 | If inquiring about the current buffer, this gets the current values, | |
452 | so store them into the alist so the alist is up to date. | |
453 | If inquiring about some other buffer, this swaps out any values | |
454 | for that buffer, making the alist up to date automatically. */ | |
553defa4 RS |
455 | register Lisp_Object tail; |
456 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 457 | { |
553defa4 RS |
458 | Lisp_Object val, elt; |
459 | ||
460 | elt = XCONS (tail)->car; | |
461 | ||
1ab256cb | 462 | if (buf == current_buffer) |
553defa4 RS |
463 | val = find_symbol_value (XCONS (elt)->car); |
464 | else | |
465 | val = XCONS (elt)->cdr; | |
466 | ||
467 | /* If symbol is unbound, put just the symbol in the list. */ | |
468 | if (EQ (val, Qunbound)) | |
469 | result = Fcons (XCONS (elt)->car, result); | |
470 | /* Otherwise, put (symbol . value) in the list. */ | |
471 | else | |
472 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
473 | } |
474 | } | |
475 | ||
1ab256cb RM |
476 | /* Add on all the variables stored in special slots. */ |
477 | { | |
478 | register int offset, mask; | |
479 | ||
480 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
481 | offset < sizeof (struct buffer); | |
482 | offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */ | |
483 | { | |
484 | mask = *(int *)(offset + (char *) &buffer_local_flags); | |
485 | if (mask == -1 || (buf->local_var_flags & mask)) | |
486 | if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) | |
487 | == Lisp_Symbol) | |
553defa4 RS |
488 | result = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols), |
489 | *(Lisp_Object *)(offset + (char *)buf)), | |
490 | result); | |
1ab256cb RM |
491 | } |
492 | } | |
553defa4 RS |
493 | |
494 | return result; | |
1ab256cb RM |
495 | } |
496 | ||
497 | \f | |
498 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
499 | 0, 1, 0, | |
500 | "Return t if BUFFER was modified since its file was last read or saved.\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 buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil; | |
515 | } | |
516 | ||
517 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
518 | 1, 1, 0, | |
519 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
520 | A non-nil FLAG means mark the buffer modified.") | |
521 | (flag) | |
522 | register Lisp_Object flag; | |
523 | { | |
524 | register int already; | |
525 | register Lisp_Object fn; | |
526 | ||
527 | #ifdef CLASH_DETECTION | |
528 | /* If buffer becoming modified, lock the file. | |
529 | If buffer becoming unmodified, unlock the file. */ | |
530 | ||
531 | fn = current_buffer->filename; | |
265a9e55 | 532 | if (!NILP (fn)) |
1ab256cb RM |
533 | { |
534 | already = current_buffer->save_modified < MODIFF; | |
265a9e55 | 535 | if (!already && !NILP (flag)) |
1ab256cb | 536 | lock_file (fn); |
265a9e55 | 537 | else if (already && NILP (flag)) |
1ab256cb RM |
538 | unlock_file (fn); |
539 | } | |
540 | #endif /* CLASH_DETECTION */ | |
541 | ||
265a9e55 | 542 | current_buffer->save_modified = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
543 | update_mode_lines++; |
544 | return flag; | |
545 | } | |
546 | ||
547 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
548 | 0, 1, 0, | |
549 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
550 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
551 | that buffer is changed. It wraps around occasionally.\n\ | |
552 | No argument or nil as argument means use current buffer as BUFFER.") | |
553 | (buffer) | |
554 | register Lisp_Object buffer; | |
555 | { | |
556 | register struct buffer *buf; | |
265a9e55 | 557 | if (NILP (buffer)) |
1ab256cb RM |
558 | buf = current_buffer; |
559 | else | |
560 | { | |
561 | CHECK_BUFFER (buffer, 0); | |
562 | buf = XBUFFER (buffer); | |
563 | } | |
564 | ||
565 | return make_number (BUF_MODIFF (buf)); | |
566 | } | |
567 | \f | |
01050cb5 | 568 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 569 | "sRename buffer (to new name): \nP", |
1ab256cb | 570 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 571 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 572 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 573 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 574 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
575 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
576 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 577 | This does not change the name of the visited file (if any).") |
3bd779aa RS |
578 | (name, unique) |
579 | register Lisp_Object name, unique; | |
1ab256cb RM |
580 | { |
581 | register Lisp_Object tem, buf; | |
582 | ||
583 | CHECK_STRING (name, 0); | |
d59698c4 RS |
584 | |
585 | if (XSTRING (name)->size == 0) | |
586 | error ("Empty string is invalid as a buffer name"); | |
587 | ||
1ab256cb | 588 | tem = Fget_buffer (name); |
c059b5ea RM |
589 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
590 | the buffer automatically so you can create another with the original name. | |
591 | It makes UNIQUE equivalent to | |
592 | (rename-buffer (generate-new-buffer-name NAME)). */ | |
593 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
01050cb5 | 594 | return current_buffer->name; |
265a9e55 | 595 | if (!NILP (tem)) |
01050cb5 | 596 | { |
3bd779aa | 597 | if (!NILP (unique)) |
c273e647 | 598 | name = Fgenerate_new_buffer_name (name, current_buffer->name); |
01050cb5 RM |
599 | else |
600 | error ("Buffer name \"%s\" is in use", XSTRING (name)->data); | |
601 | } | |
1ab256cb RM |
602 | |
603 | current_buffer->name = name; | |
76f590d7 JB |
604 | |
605 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
606 | any windows displaying current_buffer will stay unchanged. */ | |
607 | update_mode_lines++; | |
608 | ||
1ab256cb RM |
609 | XSET (buf, Lisp_Buffer, current_buffer); |
610 | Fsetcar (Frassq (buf, Vbuffer_alist), name); | |
265a9e55 | 611 | if (NILP (current_buffer->filename) && !NILP (current_buffer->auto_save_file_name)) |
1ab256cb | 612 | call0 (intern ("rename-auto-save-file")); |
01050cb5 | 613 | return name; |
1ab256cb RM |
614 | } |
615 | ||
a0ebb746 | 616 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 617 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
618 | Buffers not visible in windows are preferred to visible buffers,\n\ |
619 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
620 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
621 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
622 | (buffer, visible_ok) |
623 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
624 | { |
625 | register Lisp_Object tail, buf, notsogood, tem; | |
626 | notsogood = Qnil; | |
627 | ||
265a9e55 | 628 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
629 | { |
630 | buf = Fcdr (Fcar (tail)); | |
631 | if (EQ (buf, buffer)) | |
632 | continue; | |
633 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
634 | continue; | |
a0ebb746 | 635 | if (NILP (visible_ok)) |
db732e5a | 636 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
637 | else |
638 | tem = Qnil; | |
265a9e55 | 639 | if (NILP (tem)) |
1ab256cb | 640 | return buf; |
265a9e55 | 641 | if (NILP (notsogood)) |
1ab256cb RM |
642 | notsogood = buf; |
643 | } | |
265a9e55 | 644 | if (!NILP (notsogood)) |
1ab256cb RM |
645 | return notsogood; |
646 | return Fget_buffer_create (build_string ("*scratch*")); | |
647 | } | |
648 | \f | |
5b8bcf48 | 649 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1, |
1ab256cb | 650 | 0, |
5b8bcf48 RS |
651 | "Make BUFFER stop keeping undo information.\n\ |
652 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
653 | (buffer) |
654 | register Lisp_Object buffer; | |
1ab256cb | 655 | { |
ffd56f97 JB |
656 | Lisp_Object real_buffer; |
657 | ||
658 | if (NILP (buffer)) | |
659 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
660 | else | |
661 | { | |
662 | real_buffer = Fget_buffer (buffer); | |
663 | if (NILP (real_buffer)) | |
664 | nsberror (buffer); | |
665 | } | |
666 | ||
667 | XBUFFER (real_buffer)->undo_list = Qt; | |
668 | ||
1ab256cb RM |
669 | return Qnil; |
670 | } | |
671 | ||
672 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
673 | 0, 1, "", | |
674 | "Start keeping undo information for buffer BUFFER.\n\ | |
675 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
676 | (buffer) |
677 | register Lisp_Object buffer; | |
1ab256cb | 678 | { |
ffd56f97 | 679 | Lisp_Object real_buffer; |
1ab256cb | 680 | |
ffd56f97 JB |
681 | if (NILP (buffer)) |
682 | XSET (real_buffer, Lisp_Buffer, current_buffer); | |
1ab256cb RM |
683 | else |
684 | { | |
ffd56f97 JB |
685 | real_buffer = Fget_buffer (buffer); |
686 | if (NILP (real_buffer)) | |
687 | nsberror (buffer); | |
1ab256cb RM |
688 | } |
689 | ||
ffd56f97 JB |
690 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
691 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
692 | |
693 | return Qnil; | |
694 | } | |
695 | ||
696 | /* | |
697 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
698 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
699 | The buffer being killed will be current while the hook is running.\n\ | |
700 | See `kill-buffer'." | |
701 | */ | |
702 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
703 | "Kill the buffer BUFFER.\n\ | |
704 | The argument may be a buffer or may be the name of a buffer.\n\ | |
705 | An argument of nil means kill the current buffer.\n\n\ | |
706 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
707 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
708 | if not void, is a list of functions to be called, with no arguments,\n\ | |
709 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
710 | when the hook functions are called.\n\n\ | |
711 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
712 | with `delete-process'.") | |
713 | (bufname) | |
714 | Lisp_Object bufname; | |
715 | { | |
716 | Lisp_Object buf; | |
717 | register struct buffer *b; | |
718 | register Lisp_Object tem; | |
719 | register struct Lisp_Marker *m; | |
720 | struct gcpro gcpro1, gcpro2; | |
721 | ||
265a9e55 | 722 | if (NILP (bufname)) |
1ab256cb RM |
723 | buf = Fcurrent_buffer (); |
724 | else | |
725 | buf = Fget_buffer (bufname); | |
265a9e55 | 726 | if (NILP (buf)) |
1ab256cb RM |
727 | nsberror (bufname); |
728 | ||
729 | b = XBUFFER (buf); | |
730 | ||
731 | /* Query if the buffer is still modified. */ | |
265a9e55 | 732 | if (INTERACTIVE && !NILP (b->filename) |
1ab256cb RM |
733 | && BUF_MODIFF (b) > b->save_modified) |
734 | { | |
735 | GCPRO2 (buf, bufname); | |
736 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
737 | XSTRING (b->name)->data)); | |
738 | UNGCPRO; | |
265a9e55 | 739 | if (NILP (tem)) |
1ab256cb RM |
740 | return Qnil; |
741 | } | |
742 | ||
dcdffbf6 | 743 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
744 | { |
745 | register Lisp_Object val; | |
746 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 747 | Lisp_Object list; |
1ab256cb RM |
748 | |
749 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
750 | set_buffer_internal (b); | |
dcdffbf6 RS |
751 | |
752 | /* First run the query functions; if any query is answered no, | |
753 | don't kill the buffer. */ | |
754 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
755 | { | |
756 | tem = call0 (Fcar (list)); | |
757 | if (NILP (tem)) | |
758 | return unbind_to (count, Qnil); | |
759 | } | |
760 | ||
761 | /* Then run the hooks. */ | |
fd186f07 RS |
762 | if (!NILP (Vrun_hooks)) |
763 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
764 | unbind_to (count, Qnil); |
765 | } | |
766 | ||
767 | /* We have no more questions to ask. Verify that it is valid | |
768 | to kill the buffer. This must be done after the questions | |
769 | since anything can happen within do_yes_or_no_p. */ | |
770 | ||
771 | /* Don't kill the minibuffer now current. */ | |
772 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
773 | return Qnil; | |
774 | ||
265a9e55 | 775 | if (NILP (b->name)) |
1ab256cb RM |
776 | return Qnil; |
777 | ||
778 | /* Make this buffer not be current. | |
779 | In the process, notice if this is the sole visible buffer | |
780 | and give up if so. */ | |
781 | if (b == current_buffer) | |
782 | { | |
172a9c1f | 783 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
784 | Fset_buffer (tem); |
785 | if (b == current_buffer) | |
786 | return Qnil; | |
787 | } | |
788 | ||
789 | /* Now there is no question: we can kill the buffer. */ | |
790 | ||
791 | #ifdef CLASH_DETECTION | |
792 | /* Unlock this buffer's file, if it is locked. */ | |
793 | unlock_buffer (b); | |
794 | #endif /* CLASH_DETECTION */ | |
795 | ||
1ab256cb | 796 | kill_buffer_processes (buf); |
1ab256cb RM |
797 | |
798 | tem = Vinhibit_quit; | |
799 | Vinhibit_quit = Qt; | |
800 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
801 | Freplace_buffer_in_windows (buf); | |
802 | Vinhibit_quit = tem; | |
803 | ||
804 | /* Delete any auto-save file. */ | |
805 | if (XTYPE (b->auto_save_file_name) == Lisp_String) | |
806 | { | |
807 | Lisp_Object tem; | |
808 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 809 | if (! NILP (tem)) |
1ab256cb RM |
810 | unlink (XSTRING (b->auto_save_file_name)->data); |
811 | } | |
812 | ||
813 | /* Unchain all markers of this buffer | |
814 | and leave them pointing nowhere. */ | |
815 | for (tem = b->markers; !EQ (tem, Qnil); ) | |
816 | { | |
817 | m = XMARKER (tem); | |
818 | m->buffer = 0; | |
819 | tem = m->chain; | |
820 | m->chain = Qnil; | |
821 | } | |
822 | b->markers = Qnil; | |
823 | ||
33f7013e JA |
824 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
825 | INITIALIZE_INTERVAL (b, NULL_INTERVAL); | |
826 | /* Perhaps we should explicitly free the interval tree here... */ | |
827 | ||
1ab256cb | 828 | b->name = Qnil; |
9ac0d9e0 | 829 | BLOCK_INPUT; |
1ab256cb | 830 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
9ac0d9e0 | 831 | UNBLOCK_INPUT; |
1ab256cb RM |
832 | b->undo_list = Qnil; |
833 | ||
834 | return Qt; | |
835 | } | |
836 | \f | |
36a8c287 JB |
837 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
838 | we do this each time BUF is selected visibly, the more recently | |
839 | selected buffers are always closer to the front of the list. This | |
840 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
841 | |
842 | record_buffer (buf) | |
843 | Lisp_Object buf; | |
844 | { | |
845 | register Lisp_Object link, prev; | |
846 | ||
847 | prev = Qnil; | |
848 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
849 | { | |
850 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
851 | break; | |
852 | prev = link; | |
853 | } | |
854 | ||
36a8c287 JB |
855 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
856 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 857 | |
265a9e55 | 858 | if (NILP (prev)) |
1ab256cb RM |
859 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
860 | else | |
861 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
862 | ||
863 | XCONS(link)->cdr = Vbuffer_alist; | |
864 | Vbuffer_alist = link; | |
865 | } | |
866 | ||
867 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", | |
868 | "Select buffer BUFFER in the current window.\n\ | |
869 | BUFFER may be a buffer or a buffer name.\n\ | |
870 | Optional second arg NORECORD non-nil means\n\ | |
871 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
872 | \n\ | |
873 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
874 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
875 | the window-buffer correspondences.") | |
876 | (bufname, norecord) | |
877 | Lisp_Object bufname, norecord; | |
878 | { | |
879 | register Lisp_Object buf; | |
880 | Lisp_Object tem; | |
881 | ||
882 | if (EQ (minibuf_window, selected_window)) | |
883 | error ("Cannot switch buffers in minibuffer window"); | |
884 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 885 | if (!NILP (tem)) |
1ab256cb RM |
886 | error ("Cannot switch buffers in a dedicated window"); |
887 | ||
265a9e55 | 888 | if (NILP (bufname)) |
172a9c1f | 889 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
890 | else |
891 | buf = Fget_buffer_create (bufname); | |
892 | Fset_buffer (buf); | |
265a9e55 | 893 | if (NILP (norecord)) |
1ab256cb RM |
894 | record_buffer (buf); |
895 | ||
896 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
897 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
898 | : selected_window, | |
1ab256cb RM |
899 | buf); |
900 | ||
e8b3a22d | 901 | return buf; |
1ab256cb RM |
902 | } |
903 | ||
904 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
905 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
906 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
907 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
908 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
909 | window even if BUFFER is already visible in the selected window.") | |
910 | (bufname, other) | |
911 | Lisp_Object bufname, other; | |
912 | { | |
913 | register Lisp_Object buf; | |
265a9e55 | 914 | if (NILP (bufname)) |
172a9c1f | 915 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
916 | else |
917 | buf = Fget_buffer_create (bufname); | |
918 | Fset_buffer (buf); | |
919 | record_buffer (buf); | |
920 | Fselect_window (Fdisplay_buffer (buf, other)); | |
e8b3a22d | 921 | return buf; |
1ab256cb RM |
922 | } |
923 | ||
924 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
925 | "Return the current buffer as a Lisp object.") | |
926 | () | |
927 | { | |
928 | register Lisp_Object buf; | |
929 | XSET (buf, Lisp_Buffer, current_buffer); | |
930 | return buf; | |
931 | } | |
932 | \f | |
933 | /* Set the current buffer to b */ | |
934 | ||
935 | void | |
936 | set_buffer_internal (b) | |
937 | register struct buffer *b; | |
938 | { | |
939 | register struct buffer *old_buf; | |
940 | register Lisp_Object tail, valcontents; | |
941 | enum Lisp_Type tem; | |
942 | ||
943 | if (current_buffer == b) | |
944 | return; | |
945 | ||
946 | windows_or_buffers_changed = 1; | |
947 | old_buf = current_buffer; | |
948 | current_buffer = b; | |
949 | last_known_column_point = -1; /* invalidate indentation cache */ | |
950 | ||
951 | /* Look down buffer's list of local Lisp variables | |
952 | to find and update any that forward into C variables. */ | |
953 | ||
265a9e55 | 954 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
955 | { |
956 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
957 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
958 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
959 | && (tem = XTYPE (XCONS (valcontents)->car), | |
960 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
961 | || tem == Lisp_Objfwd))) | |
962 | /* Just reference the variable | |
963 | to cause it to become set for this buffer. */ | |
964 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
965 | } | |
966 | ||
967 | /* Do the same with any others that were local to the previous buffer */ | |
968 | ||
969 | if (old_buf) | |
265a9e55 | 970 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
971 | { |
972 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
973 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value | |
974 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) | |
975 | && (tem = XTYPE (XCONS (valcontents)->car), | |
976 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd | |
977 | || tem == Lisp_Objfwd))) | |
978 | /* Just reference the variable | |
979 | to cause it to become set for this buffer. */ | |
980 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
981 | } | |
982 | } | |
983 | ||
984 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, | |
985 | "Make the buffer BUFFER current for editing operations.\n\ | |
986 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
987 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
988 | This function does not display the buffer, so its effect ends\n\ | |
989 | when the current command terminates.\n\ | |
990 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
991 | (bufname) | |
992 | register Lisp_Object bufname; | |
993 | { | |
994 | register Lisp_Object buffer; | |
995 | buffer = Fget_buffer (bufname); | |
265a9e55 | 996 | if (NILP (buffer)) |
1ab256cb | 997 | nsberror (bufname); |
265a9e55 | 998 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
999 | error ("Selecting deleted buffer"); |
1000 | set_buffer_internal (XBUFFER (buffer)); | |
1001 | return buffer; | |
1002 | } | |
1003 | \f | |
1004 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1005 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1006 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1007 | () | |
1008 | { | |
a96b68f1 RS |
1009 | if (!NILP (current_buffer->read_only) |
1010 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1011 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1012 | return Qnil; | |
1013 | } | |
1014 | ||
1015 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1016 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1017 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1018 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1019 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1020 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1021 | selected window if it is displayed there.") | |
1ab256cb RM |
1022 | (buf) |
1023 | register Lisp_Object buf; | |
1024 | { | |
b271272a | 1025 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 1026 | if (NILP (buf)) |
a5611885 JB |
1027 | { |
1028 | XSET (buf, Lisp_Buffer, current_buffer); | |
1029 | ||
1030 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 1031 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 1032 | } |
1ab256cb RM |
1033 | else |
1034 | { | |
1035 | Lisp_Object buf1; | |
1036 | ||
1037 | buf1 = Fget_buffer (buf); | |
265a9e55 | 1038 | if (NILP (buf1)) |
1ab256cb RM |
1039 | nsberror (buf); |
1040 | buf = buf1; | |
b271272a JB |
1041 | } |
1042 | ||
a5611885 | 1043 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
1044 | { |
1045 | register Lisp_Object aelt, link; | |
1046 | ||
1047 | aelt = Frassq (buf, Vbuffer_alist); | |
1048 | link = Fmemq (aelt, Vbuffer_alist); | |
1049 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1050 | XCONS (link)->cdr = Qnil; | |
1051 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1052 | } | |
1ab256cb | 1053 | |
1ab256cb RM |
1054 | return Qnil; |
1055 | } | |
1056 | \f | |
c922bc55 | 1057 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1058 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1059 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1060 | so the buffer is truly empty after this.") |
1061 | () | |
1062 | { | |
1063 | Fwiden (); | |
1064 | del_range (BEG, Z); | |
1065 | current_buffer->last_window_start = 1; | |
1066 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1067 | if future size is less than past size. Use of erase-buffer | |
1068 | implies that the future text is not really related to the past text. */ | |
1069 | XFASTINT (current_buffer->save_length) = 0; | |
1070 | return Qnil; | |
1071 | } | |
1072 | ||
1073 | validate_region (b, e) | |
1074 | register Lisp_Object *b, *e; | |
1075 | { | |
1076 | register int i; | |
1077 | ||
1078 | CHECK_NUMBER_COERCE_MARKER (*b, 0); | |
1079 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1080 | ||
1081 | if (XINT (*b) > XINT (*e)) | |
1082 | { | |
1083 | i = XFASTINT (*b); /* This is legit even if *b is < 0 */ | |
1084 | *b = *e; | |
1085 | XFASTINT (*e) = i; /* because this is all we do with i. */ | |
1086 | } | |
1087 | ||
1088 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1089 | && XINT (*e) <= ZV)) | |
1090 | args_out_of_range (*b, *e); | |
1091 | } | |
1092 | \f | |
9f31d21b | 1093 | static Lisp_Object |
1ab256cb RM |
1094 | list_buffers_1 (files) |
1095 | Lisp_Object files; | |
1096 | { | |
1097 | register Lisp_Object tail, tem, buf; | |
1098 | Lisp_Object col1, col2, col3, minspace; | |
1099 | register struct buffer *old = current_buffer, *b; | |
718cde7d | 1100 | Lisp_Object desired_point; |
1ab256cb RM |
1101 | Lisp_Object other_file_symbol; |
1102 | ||
718cde7d | 1103 | desired_point = Qnil; |
1ab256cb RM |
1104 | other_file_symbol = intern ("list-buffers-directory"); |
1105 | ||
1106 | XFASTINT (col1) = 19; | |
1107 | XFASTINT (col2) = 25; | |
1108 | XFASTINT (col3) = 40; | |
1109 | XFASTINT (minspace) = 1; | |
1110 | ||
1111 | Fset_buffer (Vstandard_output); | |
1ab256cb RM |
1112 | Fbuffer_disable_undo (Vstandard_output); |
1113 | current_buffer->read_only = Qnil; | |
1114 | ||
1115 | write_string ("\ | |
1116 | MR Buffer Size Mode File\n\ | |
1117 | -- ------ ---- ---- ----\n", -1); | |
1118 | ||
265a9e55 | 1119 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
1120 | { |
1121 | buf = Fcdr (Fcar (tail)); | |
1122 | b = XBUFFER (buf); | |
1123 | /* Don't mention the minibuffers. */ | |
1124 | if (XSTRING (b->name)->data[0] == ' ') | |
1125 | continue; | |
1126 | /* Optionally don't mention buffers that lack files. */ | |
265a9e55 | 1127 | if (!NILP (files) && NILP (b->filename)) |
1ab256cb RM |
1128 | continue; |
1129 | /* Identify the current buffer. */ | |
1130 | if (b == old) | |
718cde7d | 1131 | XFASTINT (desired_point) = point; |
1ab256cb RM |
1132 | write_string (b == old ? "." : " ", -1); |
1133 | /* Identify modified buffers */ | |
1134 | write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1); | |
265a9e55 | 1135 | write_string (NILP (b->read_only) ? " " : "% ", -1); |
1ab256cb RM |
1136 | Fprinc (b->name, Qnil); |
1137 | Findent_to (col1, make_number (2)); | |
1138 | XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b); | |
1139 | Fprin1 (tem, Qnil); | |
1140 | Findent_to (col2, minspace); | |
1141 | Fprinc (b->mode_name, Qnil); | |
1142 | Findent_to (col3, minspace); | |
1143 | ||
265a9e55 | 1144 | if (!NILP (b->filename)) |
1ab256cb RM |
1145 | Fprinc (b->filename, Qnil); |
1146 | else | |
1147 | { | |
1148 | /* No visited file; check local value of list-buffers-directory. */ | |
1149 | Lisp_Object tem; | |
1150 | set_buffer_internal (b); | |
1151 | tem = Fboundp (other_file_symbol); | |
265a9e55 | 1152 | if (!NILP (tem)) |
1ab256cb RM |
1153 | { |
1154 | tem = Fsymbol_value (other_file_symbol); | |
1155 | Fset_buffer (Vstandard_output); | |
1156 | if (XTYPE (tem) == Lisp_String) | |
1157 | Fprinc (tem, Qnil); | |
1158 | } | |
1159 | else | |
1160 | Fset_buffer (Vstandard_output); | |
1161 | } | |
1162 | write_string ("\n", -1); | |
1163 | } | |
1164 | ||
9f31d21b KH |
1165 | tail = intern ("Buffer-menu-mode"); |
1166 | if ((tem = Ffboundp (tail), !NILP (tem))) | |
1167 | call0 (tail); | |
1ab256cb | 1168 | set_buffer_internal (old); |
718cde7d | 1169 | return desired_point; |
1ab256cb RM |
1170 | } |
1171 | ||
1172 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", | |
1173 | "Display a list of names of existing buffers.\n\ | |
1174 | The list is displayed in a buffer named `*Buffer List*'.\n\ | |
1175 | Note that buffers with names starting with spaces are omitted.\n\ | |
1176 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ | |
1177 | \n\ | |
1178 | The M column contains a * for buffers that are modified.\n\ | |
1179 | The R column contains a % for buffers that are read-only.") | |
1180 | (files) | |
1181 | Lisp_Object files; | |
1182 | { | |
e87f38ef JB |
1183 | Lisp_Object desired_point; |
1184 | ||
fd2dab90 RS |
1185 | desired_point |
1186 | = internal_with_output_to_temp_buffer ("*Buffer List*", | |
1187 | list_buffers_1, files); | |
e87f38ef | 1188 | |
718cde7d JB |
1189 | if (NUMBERP (desired_point)) |
1190 | { | |
1191 | int count = specpdl_ptr - specpdl; | |
1192 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1193 | Fset_buffer (build_string ("*Buffer List*")); | |
1194 | SET_PT (XINT (desired_point)); | |
1195 | return unbind_to (count, Qnil); | |
1196 | } | |
fd2dab90 | 1197 | return Qnil; |
1ab256cb RM |
1198 | } |
1199 | ||
1200 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, | |
1201 | 0, 0, 0, | |
1202 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1203 | Most local variable bindings are eliminated so that the default values\n\ | |
1204 | become effective once more. Also, the syntax table is set from\n\ | |
1205 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1206 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1207 | This function also forces redisplay of the mode line.\n\ | |
1208 | \n\ | |
1209 | Every function to select a new major mode starts by\n\ | |
1210 | calling this function.\n\n\ | |
1211 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1212 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1213 | \n\ | |
1214 | The first thing this function does is run\n\ | |
1215 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1216 | () |
1217 | { | |
1218 | register Lisp_Object alist, sym, tem; | |
1219 | Lisp_Object oalist; | |
7410477a | 1220 | |
fd186f07 RS |
1221 | if (!NILP (Vrun_hooks)) |
1222 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1223 | oalist = current_buffer->local_var_alist; |
1224 | ||
1225 | /* Make sure no local variables remain set up with this buffer | |
1226 | for their current values. */ | |
1227 | ||
265a9e55 | 1228 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1229 | { |
1230 | sym = XCONS (XCONS (alist)->car)->car; | |
1231 | ||
1232 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1233 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car; | |
1234 | if (XBUFFER (tem) == current_buffer) | |
1235 | { | |
1236 | /* Symbol is set up for this buffer's old local value. | |
1237 | Set it up for the current buffer with the default value. */ | |
1238 | ||
1239 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr; | |
542143d7 RS |
1240 | /* Store the symbol's current value into the alist entry |
1241 | it is currently set up for. This is so that, if the | |
1242 | local is marked permanent, and we make it local again below, | |
1243 | we don't lose the value. */ | |
2735b685 RS |
1244 | XCONS (XCONS (tem)->car)->cdr |
1245 | = do_symval_forwarding (XCONS (XSYMBOL (sym)->value)->car); | |
542143d7 | 1246 | /* Switch to the symbol's default-value alist entry. */ |
1ab256cb | 1247 | XCONS (tem)->car = tem; |
542143d7 | 1248 | /* Mark it as current for the current buffer. */ |
1ab256cb | 1249 | XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer (); |
542143d7 | 1250 | /* Store the current value into any forwarding in the symbol. */ |
1ab256cb RM |
1251 | store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car, |
1252 | XCONS (tem)->cdr); | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | /* Actually eliminate all local bindings of this buffer. */ | |
1257 | ||
1258 | reset_buffer_local_variables (current_buffer); | |
1259 | ||
1260 | /* Redisplay mode lines; we are changing major mode. */ | |
1261 | ||
1262 | update_mode_lines++; | |
1263 | ||
1264 | /* Any which are supposed to be permanent, | |
1265 | make local again, with the same values they had. */ | |
1266 | ||
265a9e55 | 1267 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1268 | { |
1269 | sym = XCONS (XCONS (alist)->car)->car; | |
1270 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1271 | if (! NILP (tem)) |
01050cb5 RM |
1272 | { |
1273 | Fmake_local_variable (sym); | |
1274 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1275 | } | |
1ab256cb RM |
1276 | } |
1277 | ||
1278 | /* Force mode-line redisplay. Useful here because all major mode | |
1279 | commands call this function. */ | |
1280 | update_mode_lines++; | |
1281 | ||
1282 | return Qnil; | |
1283 | } | |
1284 | \f | |
2eec3b4e RS |
1285 | /* Find all the overlays in the current buffer that contain position POS. |
1286 | Return the number found, and store them in a vector in *VEC_PTR. | |
1287 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1288 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1289 | or ZV if there are no more overlays. | |
2eec3b4e RS |
1290 | |
1291 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1292 | when this function is called. |
1293 | ||
1294 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1295 | If EXTEND is zero, we never extend the vector, | |
1296 | and we store only as many overlays as will fit. | |
1297 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1298 | |
1299 | int | |
61d54cd5 | 1300 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr) |
2eec3b4e | 1301 | int pos; |
61d54cd5 | 1302 | int extend; |
2eec3b4e RS |
1303 | Lisp_Object **vec_ptr; |
1304 | int *len_ptr; | |
1305 | int *next_ptr; | |
1ab256cb | 1306 | { |
2eec3b4e RS |
1307 | Lisp_Object tail, overlay, start, end, result; |
1308 | int idx = 0; | |
1309 | int len = *len_ptr; | |
1310 | Lisp_Object *vec = *vec_ptr; | |
1311 | int next = ZV; | |
61d54cd5 RS |
1312 | int inhibit_storing = 0; |
1313 | ||
2eec3b4e | 1314 | for (tail = current_buffer->overlays_before; |
4a44b14c | 1315 | XGCTYPE (tail) == Lisp_Cons; |
2eec3b4e RS |
1316 | tail = XCONS (tail)->cdr) |
1317 | { | |
52f8ec73 JB |
1318 | int startpos; |
1319 | ||
2eec3b4e | 1320 | overlay = XCONS (tail)->car; |
3ccf510a | 1321 | if (XGCTYPE (overlay) != Lisp_Overlay) |
52f8ec73 | 1322 | abort (); |
1ab256cb | 1323 | |
2eec3b4e RS |
1324 | start = OVERLAY_START (overlay); |
1325 | end = OVERLAY_END (overlay); | |
1326 | if (OVERLAY_POSITION (end) <= pos) | |
1327 | break; | |
1328 | startpos = OVERLAY_POSITION (start); | |
1329 | if (startpos <= pos) | |
1330 | { | |
1331 | if (idx == len) | |
1332 | { | |
61d54cd5 RS |
1333 | /* The supplied vector is full. |
1334 | Either make it bigger, or don't store any more in it. */ | |
1335 | if (extend) | |
1336 | { | |
1337 | *len_ptr = len *= 2; | |
1338 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1339 | *vec_ptr = vec; | |
1340 | } | |
1341 | else | |
1342 | inhibit_storing = 1; | |
2eec3b4e | 1343 | } |
61d54cd5 RS |
1344 | |
1345 | if (!inhibit_storing) | |
1346 | vec[idx] = overlay; | |
1347 | /* Keep counting overlays even if we can't return them all. */ | |
1348 | idx++; | |
2eec3b4e RS |
1349 | } |
1350 | else if (startpos < next) | |
1351 | next = startpos; | |
1352 | } | |
1353 | ||
1354 | for (tail = current_buffer->overlays_after; | |
4a44b14c | 1355 | XGCTYPE (tail) == Lisp_Cons; |
2eec3b4e | 1356 | tail = XCONS (tail)->cdr) |
1ab256cb | 1357 | { |
52f8ec73 JB |
1358 | int startpos; |
1359 | ||
2eec3b4e | 1360 | overlay = XCONS (tail)->car; |
3ccf510a | 1361 | if (XGCTYPE (overlay) != Lisp_Overlay) |
52f8ec73 | 1362 | abort (); |
2eec3b4e RS |
1363 | |
1364 | start = OVERLAY_START (overlay); | |
1365 | end = OVERLAY_END (overlay); | |
1366 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1367 | if (pos < startpos) |
2eec3b4e RS |
1368 | { |
1369 | if (startpos < next) | |
1370 | next = startpos; | |
1371 | break; | |
1372 | } | |
52f8ec73 | 1373 | if (pos < OVERLAY_POSITION (end)) |
2eec3b4e RS |
1374 | { |
1375 | if (idx == len) | |
1376 | { | |
61d54cd5 RS |
1377 | if (extend) |
1378 | { | |
1379 | *len_ptr = len *= 2; | |
1380 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1381 | *vec_ptr = vec; | |
1382 | } | |
1383 | else | |
1384 | inhibit_storing = 1; | |
2eec3b4e | 1385 | } |
61d54cd5 RS |
1386 | |
1387 | if (!inhibit_storing) | |
1388 | vec[idx] = overlay; | |
1389 | idx++; | |
2eec3b4e | 1390 | } |
1ab256cb RM |
1391 | } |
1392 | ||
2eec3b4e RS |
1393 | *next_ptr = next; |
1394 | return idx; | |
1395 | } | |
1396 | \f | |
5985d248 KH |
1397 | struct sortvec |
1398 | { | |
1399 | Lisp_Object overlay; | |
1400 | int beg, end; | |
1401 | int priority; | |
1402 | }; | |
1403 | ||
1404 | static int | |
1405 | compare_overlays (s1, s2) | |
1406 | struct sortvec *s1, *s2; | |
1407 | { | |
1408 | if (s1->priority != s2->priority) | |
1409 | return s1->priority - s2->priority; | |
1410 | if (s1->beg != s2->beg) | |
1411 | return s1->beg - s2->beg; | |
1412 | if (s1->end != s2->end) | |
1413 | return s2->end - s1->end; | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | /* Sort an array of overlays by priority. The array is modified in place. | |
1418 | The return value is the new size; this may be smaller than the original | |
1419 | size if some of the overlays were invalid or were window-specific. */ | |
1420 | int | |
1421 | sort_overlays (overlay_vec, noverlays, w) | |
1422 | Lisp_Object *overlay_vec; | |
1423 | int noverlays; | |
1424 | struct window *w; | |
1425 | { | |
1426 | int i, j; | |
1427 | struct sortvec *sortvec; | |
1428 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1429 | ||
1430 | /* Put the valid and relevant overlays into sortvec. */ | |
1431 | ||
1432 | for (i = 0, j = 0; i < noverlays; i++) | |
1433 | { | |
0fa767e7 | 1434 | Lisp_Object tem; |
c99fc30f | 1435 | Lisp_Object overlay; |
5985d248 | 1436 | |
c99fc30f | 1437 | overlay = overlay_vec[i]; |
5985d248 KH |
1438 | if (OVERLAY_VALID (overlay) |
1439 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1440 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1441 | { | |
0fa767e7 KH |
1442 | /* If we're interested in a specific window, then ignore |
1443 | overlays that are limited to some other window. */ | |
1444 | if (w) | |
5985d248 | 1445 | { |
0fa767e7 KH |
1446 | Lisp_Object window; |
1447 | ||
1448 | window = Foverlay_get (overlay, Qwindow); | |
1449 | if (XTYPE (window) == Lisp_Window && XWINDOW (window) != w) | |
1450 | continue; | |
5985d248 | 1451 | } |
0fa767e7 KH |
1452 | |
1453 | /* This overlay is good and counts: put it into sortvec. */ | |
1454 | sortvec[j].overlay = overlay; | |
1455 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1456 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1457 | tem = Foverlay_get (overlay, Qpriority); | |
1458 | if (INTEGERP (tem)) | |
1459 | sortvec[j].priority = XINT (tem); | |
1460 | else | |
1461 | sortvec[j].priority = 0; | |
1462 | j++; | |
5985d248 KH |
1463 | } |
1464 | } | |
1465 | noverlays = j; | |
1466 | ||
1467 | /* Sort the overlays into the proper order: increasing priority. */ | |
1468 | ||
1469 | if (noverlays > 1) | |
1470 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
1471 | ||
1472 | for (i = 0; i < noverlays; i++) | |
1473 | overlay_vec[i] = sortvec[i].overlay; | |
1474 | return (noverlays); | |
1475 | } | |
1476 | \f | |
5c4f68f1 | 1477 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1478 | |
2eec3b4e | 1479 | void |
5c4f68f1 JB |
1480 | recenter_overlay_lists (buf, pos) |
1481 | struct buffer *buf; | |
2eec3b4e RS |
1482 | int pos; |
1483 | { | |
1484 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1485 | ||
1486 | /* See if anything in overlays_before should move to overlays_after. */ | |
1487 | ||
1488 | /* We don't strictly need prev in this loop; it should always be nil. | |
1489 | But we use it for symmetry and in case that should cease to be true | |
1490 | with some future change. */ | |
1491 | prev = Qnil; | |
5c4f68f1 | 1492 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1493 | CONSP (tail); |
1494 | prev = tail, tail = next) | |
1ab256cb | 1495 | { |
2eec3b4e RS |
1496 | next = XCONS (tail)->cdr; |
1497 | overlay = XCONS (tail)->car; | |
1498 | ||
1499 | /* If the overlay is not valid, get rid of it. */ | |
1500 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1501 | #if 1 |
1502 | abort (); | |
1503 | #else | |
2eec3b4e RS |
1504 | { |
1505 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1506 | if (!NILP (prev)) | |
1507 | XCONS (prev)->cdr = next; | |
1508 | else | |
5c4f68f1 | 1509 | buf->overlays_before = next; |
2eec3b4e RS |
1510 | tail = prev; |
1511 | continue; | |
1512 | } | |
52f8ec73 | 1513 | #endif |
1ab256cb | 1514 | |
2eec3b4e RS |
1515 | beg = OVERLAY_START (overlay); |
1516 | end = OVERLAY_END (overlay); | |
1ab256cb | 1517 | |
2eec3b4e | 1518 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1519 | { |
2eec3b4e RS |
1520 | /* OVERLAY needs to be moved. */ |
1521 | int where = OVERLAY_POSITION (beg); | |
1522 | Lisp_Object other, other_prev; | |
1523 | ||
1524 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1525 | if (!NILP (prev)) | |
1526 | XCONS (prev)->cdr = next; | |
1527 | else | |
5c4f68f1 | 1528 | buf->overlays_before = next; |
2eec3b4e RS |
1529 | |
1530 | /* Search thru overlays_after for where to put it. */ | |
1531 | other_prev = Qnil; | |
5c4f68f1 | 1532 | for (other = buf->overlays_after; |
2eec3b4e RS |
1533 | CONSP (other); |
1534 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1535 | { |
2eec3b4e RS |
1536 | Lisp_Object otherbeg, otheroverlay, follower; |
1537 | int win; | |
1538 | ||
1539 | otheroverlay = XCONS (other)->car; | |
1540 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1541 | abort (); |
2eec3b4e RS |
1542 | |
1543 | otherbeg = OVERLAY_START (otheroverlay); | |
1544 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1545 | break; | |
1ab256cb | 1546 | } |
2eec3b4e RS |
1547 | |
1548 | /* Add TAIL to overlays_after before OTHER. */ | |
1549 | XCONS (tail)->cdr = other; | |
1550 | if (!NILP (other_prev)) | |
1551 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1552 | else |
5c4f68f1 | 1553 | buf->overlays_after = tail; |
2eec3b4e | 1554 | tail = prev; |
1ab256cb | 1555 | } |
2eec3b4e RS |
1556 | else |
1557 | /* We've reached the things that should stay in overlays_before. | |
1558 | All the rest of overlays_before must end even earlier, | |
1559 | so stop now. */ | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | /* See if anything in overlays_after should be in overlays_before. */ | |
1564 | prev = Qnil; | |
5c4f68f1 | 1565 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1566 | CONSP (tail); |
1567 | prev = tail, tail = next) | |
1568 | { | |
1569 | next = XCONS (tail)->cdr; | |
1570 | overlay = XCONS (tail)->car; | |
1571 | ||
1572 | /* If the overlay is not valid, get rid of it. */ | |
1573 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1574 | #if 1 |
1575 | abort (); | |
1576 | #else | |
2eec3b4e RS |
1577 | { |
1578 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1579 | if (!NILP (prev)) | |
1580 | XCONS (prev)->cdr = next; | |
1581 | else | |
5c4f68f1 | 1582 | buf->overlays_after = next; |
2eec3b4e RS |
1583 | tail = prev; |
1584 | continue; | |
1585 | } | |
52f8ec73 | 1586 | #endif |
2eec3b4e RS |
1587 | |
1588 | beg = OVERLAY_START (overlay); | |
1589 | end = OVERLAY_END (overlay); | |
1590 | ||
1591 | /* Stop looking, when we know that nothing further | |
1592 | can possibly end before POS. */ | |
1593 | if (OVERLAY_POSITION (beg) > pos) | |
1594 | break; | |
1595 | ||
1596 | if (OVERLAY_POSITION (end) <= pos) | |
1597 | { | |
1598 | /* OVERLAY needs to be moved. */ | |
1599 | int where = OVERLAY_POSITION (end); | |
1600 | Lisp_Object other, other_prev; | |
1601 | ||
1602 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1603 | if (!NILP (prev)) | |
1604 | XCONS (prev)->cdr = next; | |
1605 | else | |
5c4f68f1 | 1606 | buf->overlays_after = next; |
2eec3b4e RS |
1607 | |
1608 | /* Search thru overlays_before for where to put it. */ | |
1609 | other_prev = Qnil; | |
5c4f68f1 | 1610 | for (other = buf->overlays_before; |
2eec3b4e RS |
1611 | CONSP (other); |
1612 | other_prev = other, other = XCONS (other)->cdr) | |
1613 | { | |
1614 | Lisp_Object otherend, otheroverlay; | |
1615 | int win; | |
1616 | ||
1617 | otheroverlay = XCONS (other)->car; | |
1618 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1619 | abort (); |
2eec3b4e RS |
1620 | |
1621 | otherend = OVERLAY_END (otheroverlay); | |
1622 | if (OVERLAY_POSITION (otherend) <= where) | |
1623 | break; | |
1624 | } | |
1625 | ||
1626 | /* Add TAIL to overlays_before before OTHER. */ | |
1627 | XCONS (tail)->cdr = other; | |
1628 | if (!NILP (other_prev)) | |
1629 | XCONS (other_prev)->cdr = tail; | |
1630 | else | |
5c4f68f1 | 1631 | buf->overlays_before = tail; |
2eec3b4e RS |
1632 | tail = prev; |
1633 | } | |
1634 | } | |
1635 | ||
5c4f68f1 | 1636 | XFASTINT (buf->overlay_center) = pos; |
2eec3b4e RS |
1637 | } |
1638 | \f | |
52f8ec73 JB |
1639 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1640 | "Return t if OBJECT is an overlay.") | |
1641 | (object) | |
1642 | Lisp_Object object; | |
1643 | { | |
1644 | return (OVERLAYP (object) ? Qt : Qnil); | |
1645 | } | |
1646 | ||
5c4f68f1 JB |
1647 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1648 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1649 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1650 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1651 | (beg, end, buffer) |
1652 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1653 | { |
1654 | Lisp_Object overlay; | |
5c4f68f1 | 1655 | struct buffer *b; |
2eec3b4e | 1656 | |
5c4f68f1 JB |
1657 | if (NILP (buffer)) |
1658 | XSET (buffer, Lisp_Buffer, current_buffer); | |
883047b9 JB |
1659 | else |
1660 | CHECK_BUFFER (buffer, 2); | |
1661 | if (MARKERP (beg) | |
1662 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1663 | error ("Marker points into wrong buffer"); | |
1664 | if (MARKERP (end) | |
1665 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1666 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 1667 | |
883047b9 JB |
1668 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1669 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 1670 | |
883047b9 | 1671 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 1672 | { |
c99fc30f KH |
1673 | Lisp_Object temp; |
1674 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 1675 | } |
883047b9 JB |
1676 | |
1677 | b = XBUFFER (buffer); | |
1678 | ||
1679 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
1680 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 JB |
1681 | |
1682 | overlay = Fcons (Fcons (beg, end), Qnil); | |
52f8ec73 | 1683 | XSETTYPE (overlay, Lisp_Overlay); |
2eec3b4e RS |
1684 | |
1685 | /* Put the new overlay on the wrong list. */ | |
1686 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1687 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1688 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1689 | else |
5c4f68f1 | 1690 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1691 | |
1692 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1693 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1694 | |
b61982dd JB |
1695 | /* We don't need to redisplay the region covered by the overlay, because |
1696 | the overlay has no properties at the moment. */ | |
1697 | ||
2eec3b4e RS |
1698 | return overlay; |
1699 | } | |
1700 | ||
5c4f68f1 JB |
1701 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
1702 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
1703 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
1704 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
1705 | buffer.") | |
5c4f68f1 JB |
1706 | (overlay, beg, end, buffer) |
1707 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 1708 | { |
0a4469c9 RS |
1709 | struct buffer *b, *ob; |
1710 | Lisp_Object obuffer; | |
1711 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 1712 | |
52f8ec73 | 1713 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
1714 | if (NILP (buffer)) |
1715 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a JB |
1716 | if (NILP (buffer)) |
1717 | XSET (buffer, Lisp_Buffer, current_buffer); | |
5c4f68f1 | 1718 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
1719 | |
1720 | if (MARKERP (beg) | |
1721 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1722 | error ("Marker points into wrong buffer"); | |
1723 | if (MARKERP (end) | |
1724 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1725 | error ("Marker points into wrong buffer"); | |
1726 | ||
b61982dd JB |
1727 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1728 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
1729 | ||
0a4469c9 RS |
1730 | specbind (Qinhibit_quit, Qt); |
1731 | ||
b61982dd JB |
1732 | if (XINT (beg) > XINT (end)) |
1733 | { | |
c99fc30f KH |
1734 | Lisp_Object temp; |
1735 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
1736 | } |
1737 | ||
0a4469c9 | 1738 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 1739 | b = XBUFFER (buffer); |
0a4469c9 | 1740 | ob = XBUFFER (obuffer); |
2eec3b4e | 1741 | |
c82ed728 | 1742 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 1743 | if (!EQ (buffer, obuffer)) |
c82ed728 JB |
1744 | windows_or_buffers_changed = 1; |
1745 | else | |
1746 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
1747 | { | |
be8b1c6b RS |
1748 | Lisp_Object o_beg; |
1749 | Lisp_Object o_end; | |
c82ed728 JB |
1750 | int change_beg, change_end; |
1751 | ||
be8b1c6b RS |
1752 | o_beg = OVERLAY_START (overlay); |
1753 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
1754 | o_beg = OVERLAY_POSITION (o_beg); |
1755 | o_end = OVERLAY_POSITION (o_end); | |
1756 | ||
1757 | if (XINT (o_beg) == XINT (beg)) | |
1758 | redisplay_region (b, XINT (o_end), XINT (end)); | |
1759 | else if (XINT (o_end) == XINT (end)) | |
1760 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
1761 | else | |
1762 | { | |
1763 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
1764 | if (XINT (end) > XINT (o_end)) o_end = end; | |
1765 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
1766 | } | |
1767 | } | |
b61982dd | 1768 | |
0a4469c9 RS |
1769 | if (!NILP (obuffer)) |
1770 | { | |
1771 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
1772 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
1773 | } | |
5c4f68f1 JB |
1774 | |
1775 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
1776 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
1777 | |
1778 | /* Put the overlay on the wrong list. */ | |
1779 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
1780 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
1781 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 1782 | else |
5c4f68f1 | 1783 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
1784 | |
1785 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 1786 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 1787 | |
0a4469c9 | 1788 | return unbind_to (count, overlay); |
2eec3b4e RS |
1789 | } |
1790 | ||
1791 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 1792 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 1793 | (overlay) |
5c4f68f1 | 1794 | Lisp_Object overlay; |
2eec3b4e | 1795 | { |
0a4469c9 | 1796 | Lisp_Object buffer; |
5c4f68f1 | 1797 | struct buffer *b; |
0a4469c9 | 1798 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 1799 | |
52f8ec73 JB |
1800 | CHECK_OVERLAY (overlay, 0); |
1801 | ||
0a4469c9 RS |
1802 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
1803 | if (NILP (buffer)) | |
1804 | return Qnil; | |
1805 | ||
1806 | b = XBUFFER (buffer); | |
1807 | ||
1808 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
1809 | |
1810 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
1811 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
1812 | ||
b61982dd | 1813 | redisplay_region (b, |
a927f5c9 RS |
1814 | marker_position (OVERLAY_START (overlay)), |
1815 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 1816 | |
3ece337a JB |
1817 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
1818 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
1819 | ||
0a4469c9 | 1820 | return unbind_to (count, Qnil); |
2eec3b4e RS |
1821 | } |
1822 | \f | |
8ebafa8d JB |
1823 | /* Overlay dissection functions. */ |
1824 | ||
1825 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
1826 | "Return the position at which OVERLAY starts.") | |
1827 | (overlay) | |
1828 | Lisp_Object overlay; | |
1829 | { | |
1830 | CHECK_OVERLAY (overlay, 0); | |
1831 | ||
1832 | return (Fmarker_position (OVERLAY_START (overlay))); | |
1833 | } | |
1834 | ||
1835 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
1836 | "Return the position at which OVERLAY ends.") | |
1837 | (overlay) | |
1838 | Lisp_Object overlay; | |
1839 | { | |
1840 | CHECK_OVERLAY (overlay, 0); | |
1841 | ||
1842 | return (Fmarker_position (OVERLAY_END (overlay))); | |
1843 | } | |
1844 | ||
1845 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
1846 | "Return the buffer OVERLAY belongs to.") | |
1847 | (overlay) | |
1848 | Lisp_Object overlay; | |
1849 | { | |
1850 | CHECK_OVERLAY (overlay, 0); | |
1851 | ||
1852 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
1853 | } | |
1854 | ||
1855 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
1856 | "Return a list of the properties on OVERLAY.\n\ | |
1857 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
1858 | OVERLAY.") | |
1859 | (overlay) | |
1860 | Lisp_Object overlay; | |
1861 | { | |
1862 | CHECK_OVERLAY (overlay, 0); | |
1863 | ||
1864 | return Fcopy_sequence (Fcdr_safe (XCONS (overlay)->cdr)); | |
1865 | } | |
1866 | ||
1867 | \f | |
2eec3b4e | 1868 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 1869 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
1870 | (pos) |
1871 | Lisp_Object pos; | |
1872 | { | |
1873 | int noverlays; | |
1874 | int endpos; | |
1875 | Lisp_Object *overlay_vec; | |
1876 | int len; | |
1877 | Lisp_Object result; | |
1878 | ||
1879 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1880 | ||
1881 | len = 10; | |
1882 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1883 | ||
1884 | /* Put all the overlays we want in a vector in overlay_vec. | |
1885 | Store the length in len. */ | |
61d54cd5 | 1886 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos); |
2eec3b4e RS |
1887 | |
1888 | /* Make a list of them all. */ | |
1889 | result = Flist (noverlays, overlay_vec); | |
1890 | ||
9ac0d9e0 | 1891 | xfree (overlay_vec); |
2eec3b4e RS |
1892 | return result; |
1893 | } | |
1894 | ||
1895 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
1896 | 1, 1, 0, | |
bbe20e81 KH |
1897 | "Return the next position after POS where an overlay starts or ends.\n\ |
1898 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
1899 | (pos) |
1900 | Lisp_Object pos; | |
1901 | { | |
1902 | int noverlays; | |
1903 | int endpos; | |
1904 | Lisp_Object *overlay_vec; | |
1905 | int len; | |
1906 | Lisp_Object result; | |
1907 | int i; | |
1908 | ||
1909 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1910 | ||
1911 | len = 10; | |
1912 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
1913 | ||
1914 | /* Put all the overlays we want in a vector in overlay_vec. | |
1915 | Store the length in len. | |
1916 | endpos gets the position where the next overlay starts. */ | |
61d54cd5 | 1917 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos); |
2eec3b4e RS |
1918 | |
1919 | /* If any of these overlays ends before endpos, | |
1920 | use its ending point instead. */ | |
1921 | for (i = 0; i < noverlays; i++) | |
1922 | { | |
1923 | Lisp_Object oend; | |
1924 | int oendpos; | |
1925 | ||
1926 | oend = OVERLAY_END (overlay_vec[i]); | |
1927 | oendpos = OVERLAY_POSITION (oend); | |
1928 | if (oendpos < endpos) | |
1929 | endpos = oendpos; | |
1ab256cb RM |
1930 | } |
1931 | ||
9ac0d9e0 | 1932 | xfree (overlay_vec); |
2eec3b4e RS |
1933 | return make_number (endpos); |
1934 | } | |
1935 | \f | |
1936 | /* These functions are for debugging overlays. */ | |
1937 | ||
1938 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
1939 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
1940 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 1941 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
1942 | Recentering overlays moves overlays between these lists.\n\ |
1943 | The lists you get are copies, so that changing them has no effect.\n\ | |
1944 | However, the overlays you get are the real objects that the buffer uses.") | |
1945 | () | |
1946 | { | |
1947 | Lisp_Object before, after; | |
1948 | before = current_buffer->overlays_before; | |
1949 | if (CONSP (before)) | |
1950 | before = Fcopy_sequence (before); | |
1951 | after = current_buffer->overlays_after; | |
1952 | if (CONSP (after)) | |
1953 | after = Fcopy_sequence (after); | |
1954 | ||
1955 | return Fcons (before, after); | |
1956 | } | |
1957 | ||
1958 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
1959 | "Recenter the overlays of the current buffer around position POS.") | |
1960 | (pos) | |
1961 | Lisp_Object pos; | |
1962 | { | |
1963 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
1964 | ||
5c4f68f1 | 1965 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
1966 | return Qnil; |
1967 | } | |
1968 | \f | |
1969 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
1970 | "Get the property of overlay OVERLAY with property name NAME.") | |
1971 | (overlay, prop) | |
1972 | Lisp_Object overlay, prop; | |
1973 | { | |
1974 | Lisp_Object plist; | |
52f8ec73 JB |
1975 | |
1976 | CHECK_OVERLAY (overlay, 0); | |
1977 | ||
1978 | for (plist = Fcdr_safe (XCONS (overlay)->cdr); | |
2eec3b4e RS |
1979 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
1980 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
1981 | { | |
1982 | if (EQ (XCONS (plist)->car, prop)) | |
1983 | return XCONS (XCONS (plist)->cdr)->car; | |
1984 | } | |
52f8ec73 JB |
1985 | |
1986 | return Qnil; | |
2eec3b4e RS |
1987 | } |
1988 | ||
1989 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
1990 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
1991 | (overlay, prop, value) | |
1992 | Lisp_Object overlay, prop, value; | |
1993 | { | |
1994 | Lisp_Object plist, tail; | |
1995 | ||
52f8ec73 | 1996 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 1997 | |
25d16451 RS |
1998 | tail = Fmarker_buffer (OVERLAY_START (overlay)); |
1999 | if (! NILP (tail)) | |
2000 | redisplay_region (XMARKER (OVERLAY_START (overlay))->buffer, | |
2001 | marker_position (OVERLAY_START (overlay)), | |
2002 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2003 | |
52f8ec73 | 2004 | plist = Fcdr_safe (XCONS (overlay)->cdr); |
2eec3b4e RS |
2005 | |
2006 | for (tail = plist; | |
2007 | CONSP (tail) && CONSP (XCONS (tail)->cdr); | |
2008 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
2009 | { | |
2010 | if (EQ (XCONS (tail)->car, prop)) | |
2011 | return XCONS (XCONS (tail)->cdr)->car = value; | |
2012 | } | |
2013 | ||
2014 | if (! CONSP (XCONS (overlay)->cdr)) | |
2015 | XCONS (overlay)->cdr = Fcons (Qnil, Qnil); | |
2016 | ||
2017 | XCONS (XCONS (overlay)->cdr)->cdr | |
2018 | = Fcons (prop, Fcons (value, plist)); | |
2019 | ||
2020 | return value; | |
1ab256cb RM |
2021 | } |
2022 | \f | |
173f2a64 RS |
2023 | /* Run the modification-hooks of overlays that include |
2024 | any part of the text in START to END. | |
2025 | Run the insert-before-hooks of overlay starting at END, | |
2026 | and the insert-after-hooks of overlay ending at START. */ | |
2027 | ||
2028 | void | |
2029 | verify_overlay_modification (start, end) | |
2030 | Lisp_Object start, end; | |
2031 | { | |
2032 | Lisp_Object prop, overlay, tail; | |
2033 | int insertion = EQ (start, end); | |
2034 | ||
2035 | for (tail = current_buffer->overlays_before; | |
2036 | CONSP (tail); | |
2037 | tail = XCONS (tail)->cdr) | |
2038 | { | |
2039 | int startpos, endpos; | |
be8b1c6b | 2040 | Lisp_Object ostart, oend; |
173f2a64 RS |
2041 | |
2042 | overlay = XCONS (tail)->car; | |
2043 | ||
2044 | ostart = OVERLAY_START (overlay); | |
2045 | oend = OVERLAY_END (overlay); | |
2046 | endpos = OVERLAY_POSITION (oend); | |
2047 | if (XFASTINT (start) > endpos) | |
2048 | break; | |
2049 | startpos = OVERLAY_POSITION (ostart); | |
2050 | if (XFASTINT (end) == startpos && insertion) | |
2051 | { | |
2052 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2053 | if (!NILP (prop)) |
2054 | { | |
2055 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
2056 | tail = Fcopy_sequence (tail); | |
2057 | call_overlay_mod_hooks (prop, overlay, start, end); | |
2058 | } | |
173f2a64 RS |
2059 | } |
2060 | if (XFASTINT (start) == endpos && insertion) | |
2061 | { | |
2062 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2063 | if (!NILP (prop)) |
2064 | { | |
2065 | tail = Fcopy_sequence (tail); | |
2066 | call_overlay_mod_hooks (prop, overlay, start, end); | |
2067 | } | |
173f2a64 | 2068 | } |
3bd13e92 KH |
2069 | /* Test for intersecting intervals. This does the right thing |
2070 | for both insertion and deletion. */ | |
2071 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2072 | { |
2073 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2074 | if (!NILP (prop)) |
2075 | { | |
2076 | tail = Fcopy_sequence (tail); | |
2077 | call_overlay_mod_hooks (prop, overlay, start, end); | |
2078 | } | |
173f2a64 RS |
2079 | } |
2080 | } | |
2081 | ||
2082 | for (tail = current_buffer->overlays_after; | |
2083 | CONSP (tail); | |
2084 | tail = XCONS (tail)->cdr) | |
2085 | { | |
2086 | int startpos, endpos; | |
be8b1c6b | 2087 | Lisp_Object ostart, oend; |
173f2a64 RS |
2088 | |
2089 | overlay = XCONS (tail)->car; | |
2090 | ||
2091 | ostart = OVERLAY_START (overlay); | |
2092 | oend = OVERLAY_END (overlay); | |
2093 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 2094 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
2095 | if (XFASTINT (end) < startpos) |
2096 | break; | |
2097 | if (XFASTINT (end) == startpos && insertion) | |
2098 | { | |
2099 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2100 | if (!NILP (prop)) |
2101 | { | |
2102 | tail = Fcopy_sequence (tail); | |
2103 | call_overlay_mod_hooks (prop, overlay, start, end); | |
2104 | } | |
173f2a64 RS |
2105 | } |
2106 | if (XFASTINT (start) == endpos && insertion) | |
2107 | { | |
2108 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2109 | if (!NILP (prop)) |
2110 | { | |
2111 | tail = Fcopy_sequence (tail); | |
2112 | call_overlay_mod_hooks (prop, overlay, start, end); | |
2113 | } | |
173f2a64 | 2114 | } |
3bd13e92 KH |
2115 | /* Test for intersecting intervals. This does the right thing |
2116 | for both insertion and deletion. */ | |
2117 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2118 | { |
2119 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2120 | if (!NILP (prop)) |
2121 | { | |
2122 | tail = Fcopy_sequence (tail); | |
2123 | call_overlay_mod_hooks (prop, overlay, start, end); | |
2124 | } | |
173f2a64 RS |
2125 | } |
2126 | } | |
2127 | } | |
2128 | ||
2129 | static void | |
2130 | call_overlay_mod_hooks (list, overlay, start, end) | |
2131 | Lisp_Object list, overlay, start, end; | |
2132 | { | |
2133 | struct gcpro gcpro1; | |
2134 | GCPRO1 (list); | |
2135 | while (!NILP (list)) | |
2136 | { | |
2137 | call3 (Fcar (list), overlay, start, end); | |
2138 | list = Fcdr (list); | |
2139 | } | |
2140 | UNGCPRO; | |
2141 | } | |
2142 | \f | |
0fa3ba92 JB |
2143 | /* Somebody has tried to store NEWVAL into the buffer-local slot with |
2144 | offset XUINT (valcontents), and NEWVAL has an unacceptable type. */ | |
2145 | void | |
2146 | buffer_slot_type_mismatch (valcontents, newval) | |
2147 | Lisp_Object valcontents, newval; | |
2148 | { | |
2149 | unsigned int offset = XUINT (valcontents); | |
5fcd022d | 2150 | unsigned char *symbol_name = |
0fa3ba92 JB |
2151 | (XSYMBOL (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
2152 | ->name->data); | |
2153 | char *type_name; | |
2154 | ||
2155 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) | |
2156 | { | |
2157 | case Lisp_Int: type_name = "integers"; break; | |
2158 | case Lisp_String: type_name = "strings"; break; | |
2159 | case Lisp_Marker: type_name = "markers"; break; | |
2160 | case Lisp_Symbol: type_name = "symbols"; break; | |
2161 | case Lisp_Cons: type_name = "lists"; break; | |
5fcd022d | 2162 | case Lisp_Vector: type_name = "vectors"; break; |
0fa3ba92 JB |
2163 | default: |
2164 | abort (); | |
2165 | } | |
2166 | ||
2167 | error ("only %s should be stored in the buffer-local variable %s", | |
2168 | type_name, symbol_name); | |
2169 | } | |
2170 | \f | |
1ab256cb RM |
2171 | init_buffer_once () |
2172 | { | |
2173 | register Lisp_Object tem; | |
2174 | ||
2175 | /* Make sure all markable slots in buffer_defaults | |
2176 | are initialized reasonably, so mark_buffer won't choke. */ | |
2177 | reset_buffer (&buffer_defaults); | |
2178 | reset_buffer (&buffer_local_symbols); | |
2179 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); | |
2180 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); | |
2181 | ||
2182 | /* Set up the default values of various buffer slots. */ | |
2183 | /* Must do these before making the first buffer! */ | |
2184 | ||
2185 | /* real setup is done in loaddefs.el */ | |
2186 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2187 | buffer_defaults.abbrev_mode = Qnil; | |
2188 | buffer_defaults.overwrite_mode = Qnil; | |
2189 | buffer_defaults.case_fold_search = Qt; | |
2190 | buffer_defaults.auto_fill_function = Qnil; | |
2191 | buffer_defaults.selective_display = Qnil; | |
2192 | #ifndef old | |
2193 | buffer_defaults.selective_display_ellipses = Qt; | |
2194 | #endif | |
2195 | buffer_defaults.abbrev_table = Qnil; | |
2196 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2197 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2198 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2199 | buffer_defaults.overlays_before = Qnil; |
2200 | buffer_defaults.overlays_after = Qnil; | |
2201 | XFASTINT (buffer_defaults.overlay_center) = 1; | |
1ab256cb RM |
2202 | |
2203 | XFASTINT (buffer_defaults.tab_width) = 8; | |
2204 | buffer_defaults.truncate_lines = Qnil; | |
2205 | buffer_defaults.ctl_arrow = Qt; | |
2206 | ||
54ad07d3 | 2207 | #ifdef MSDOS |
0776cb1b | 2208 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 2209 | #endif |
1ab256cb RM |
2210 | XFASTINT (buffer_defaults.fill_column) = 70; |
2211 | XFASTINT (buffer_defaults.left_margin) = 0; | |
2212 | ||
2213 | /* Assign the local-flags to the slots that have default values. | |
2214 | The local flag is a bit that is used in the buffer | |
2215 | to say that it has its own local value for the slot. | |
2216 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2217 | ||
2218 | /* Nothing can work if this isn't true */ | |
2219 | if (sizeof (int) != sizeof (Lisp_Object)) abort (); | |
2220 | ||
2221 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2222 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
2223 | XFASTINT (buffer_local_flags.filename) = -1; | |
2224 | XFASTINT (buffer_local_flags.directory) = -1; | |
2225 | XFASTINT (buffer_local_flags.backed_up) = -1; | |
2226 | XFASTINT (buffer_local_flags.save_length) = -1; | |
2227 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; | |
2228 | XFASTINT (buffer_local_flags.read_only) = -1; | |
2229 | XFASTINT (buffer_local_flags.major_mode) = -1; | |
2230 | XFASTINT (buffer_local_flags.mode_name) = -1; | |
2231 | XFASTINT (buffer_local_flags.undo_list) = -1; | |
c48f61ef | 2232 | XFASTINT (buffer_local_flags.mark_active) = -1; |
1ab256cb RM |
2233 | |
2234 | XFASTINT (buffer_local_flags.mode_line_format) = 1; | |
2235 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; | |
2236 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; | |
2237 | XFASTINT (buffer_local_flags.case_fold_search) = 8; | |
2238 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; | |
2239 | XFASTINT (buffer_local_flags.selective_display) = 0x20; | |
2240 | #ifndef old | |
2241 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; | |
2242 | #endif | |
2243 | XFASTINT (buffer_local_flags.tab_width) = 0x80; | |
2244 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; | |
2245 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; | |
2246 | XFASTINT (buffer_local_flags.fill_column) = 0x400; | |
2247 | XFASTINT (buffer_local_flags.left_margin) = 0x800; | |
2248 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; | |
2249 | XFASTINT (buffer_local_flags.display_table) = 0x2000; | |
1ab256cb | 2250 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
54ad07d3 RS |
2251 | #ifdef MSDOS |
2252 | XFASTINT (buffer_local_flags.buffer_file_type) = 0x4000; | |
2253 | #endif | |
1ab256cb RM |
2254 | |
2255 | Vbuffer_alist = Qnil; | |
2256 | current_buffer = 0; | |
2257 | all_buffers = 0; | |
2258 | ||
2259 | QSFundamental = build_string ("Fundamental"); | |
2260 | ||
2261 | Qfundamental_mode = intern ("fundamental-mode"); | |
2262 | buffer_defaults.major_mode = Qfundamental_mode; | |
2263 | ||
2264 | Qmode_class = intern ("mode-class"); | |
2265 | ||
2266 | Qprotected_field = intern ("protected-field"); | |
2267 | ||
2268 | Qpermanent_local = intern ("permanent-local"); | |
2269 | ||
2270 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2271 | ||
2272 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2273 | /* super-magic invisible buffer */ | |
2274 | Vbuffer_alist = Qnil; | |
2275 | ||
ffd56f97 | 2276 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2277 | } |
2278 | ||
2279 | init_buffer () | |
2280 | { | |
2281 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2282 | char *pwd; |
2283 | struct stat dotstat, pwdstat; | |
136351b7 | 2284 | Lisp_Object temp; |
1ab256cb RM |
2285 | |
2286 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2287 | |
2288 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2289 | when PWD is right, and may avoid a fatal error. */ | |
2290 | if ((pwd = getenv ("PWD")) != 0 && *pwd == '/' | |
2291 | && stat (pwd, &pwdstat) == 0 | |
2292 | && stat (".", &dotstat) == 0 | |
2293 | && dotstat.st_ino == pwdstat.st_ino | |
2294 | && dotstat.st_dev == pwdstat.st_dev | |
2295 | && strlen (pwd) < MAXPATHLEN) | |
2296 | strcpy (buf, pwd); | |
2297 | else if (getwd (buf) == 0) | |
1ab256cb RM |
2298 | fatal ("`getwd' failed: %s.\n", buf); |
2299 | ||
2300 | #ifndef VMS | |
2301 | /* Maybe this should really use some standard subroutine | |
2302 | whose definition is filename syntax dependent. */ | |
2303 | if (buf[strlen (buf) - 1] != '/') | |
2304 | strcat (buf, "/"); | |
2305 | #endif /* not VMS */ | |
2306 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2307 | |
2308 | temp = get_minibuffer (0); | |
2309 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2310 | } |
2311 | ||
2312 | /* initialize the buffer routines */ | |
2313 | syms_of_buffer () | |
2314 | { | |
188d4d11 RM |
2315 | extern Lisp_Object Qdisabled; |
2316 | ||
1ab256cb RM |
2317 | staticpro (&Vbuffer_defaults); |
2318 | staticpro (&Vbuffer_local_symbols); | |
2319 | staticpro (&Qfundamental_mode); | |
2320 | staticpro (&Qmode_class); | |
2321 | staticpro (&QSFundamental); | |
2322 | staticpro (&Vbuffer_alist); | |
2323 | staticpro (&Qprotected_field); | |
2324 | staticpro (&Qpermanent_local); | |
2325 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2326 | staticpro (&Qoverlayp); |
294d215f RS |
2327 | staticpro (&Qmodification_hooks); |
2328 | Qmodification_hooks = intern ("modification-hooks"); | |
2329 | staticpro (&Qinsert_in_front_hooks); | |
2330 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2331 | staticpro (&Qinsert_behind_hooks); | |
2332 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2333 | staticpro (&Qget_file_buffer); |
2334 | Qget_file_buffer = intern ("get-file-buffer"); | |
5985d248 KH |
2335 | Qpriority = intern ("priority"); |
2336 | staticpro (&Qpriority); | |
2337 | Qwindow = intern ("window"); | |
2338 | staticpro (&Qwindow); | |
52f8ec73 JB |
2339 | |
2340 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2341 | |
2342 | Fput (Qprotected_field, Qerror_conditions, | |
2343 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2344 | Fput (Qprotected_field, Qerror_message, | |
2345 | build_string ("Attempt to modify a protected field")); | |
2346 | ||
2347 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
2348 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2349 | ||
2350 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2351 | &buffer_defaults.mode_line_format, | |
2352 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2353 | This is the same as (default-value 'mode-line-format)."); | |
2354 | ||
2355 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2356 | &buffer_defaults.abbrev_mode, | |
2357 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2358 | This is the same as (default-value 'abbrev-mode)."); | |
2359 | ||
2360 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2361 | &buffer_defaults.ctl_arrow, | |
2362 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2363 | This is the same as (default-value 'ctl-arrow)."); | |
2364 | ||
2365 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2366 | &buffer_defaults.truncate_lines, | |
2367 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2368 | This is the same as (default-value 'truncate-lines)."); | |
2369 | ||
2370 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2371 | &buffer_defaults.fill_column, | |
2372 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2373 | This is the same as (default-value 'fill-column)."); | |
2374 | ||
2375 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2376 | &buffer_defaults.left_margin, | |
2377 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2378 | This is the same as (default-value 'left-margin)."); | |
2379 | ||
2380 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
2381 | &buffer_defaults.tab_width, | |
2382 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
2383 | This is the same as (default-value 'tab-width)."); | |
2384 | ||
2385 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
2386 | &buffer_defaults.case_fold_search, | |
2387 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
2388 | This is the same as (default-value 'case-fold-search)."); | |
2389 | ||
54ad07d3 RS |
2390 | #ifdef MSDOS |
2391 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", | |
2392 | &buffer_defaults.buffer_file_type, | |
2393 | "Default file type for buffers that do not override it.\n\ | |
2394 | This is the same as (default-value 'buffer-file-type).\n\ | |
2395 | The file type is nil for text, t for binary."); | |
2396 | #endif | |
2397 | ||
0fa3ba92 JB |
2398 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
2399 | Qnil, 0); | |
1ab256cb RM |
2400 | |
2401 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
2402 | But make-docfile finds it! | |
2403 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 2404 | Qnil, |
1ab256cb RM |
2405 | "Template for displaying mode line for current buffer.\n\ |
2406 | Each buffer has its own value of this variable.\n\ | |
2407 | Value may be a string, a symbol or a list or cons cell.\n\ | |
2408 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
2409 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
2410 | in that the %-constructs below are not recognized.\n\ | |
2411 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
2412 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
2413 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
2414 | For a list whose car is a string or list, each element is processed\n\ | |
2415 | recursively and the results are effectively concatenated.\n\ | |
2416 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
2417 | and padded (if the number is positive) or truncated (if negative)\n\ | |
2418 | to the width specified by that number.\n\ | |
2419 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
2420 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
2421 | or when it is found in a cons-cell or a list)\n\ | |
2422 | %b -- print buffer name. %f -- print visited file name.\n\ | |
2423 | %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\ | |
a97c374a | 2424 | %s -- print process status. %l -- print the current line number.\n\ |
dd24e6a6 | 2425 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 2426 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 2427 | or print Bottom or All.\n\ |
1ab256cb | 2428 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 2429 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
2430 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
2431 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2432 | Decimal digits after the % specify field width to which to pad."); | |
2433 | */ | |
2434 | ||
2435 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2436 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2437 | nil here means use current buffer's major mode."); | |
2438 | ||
2439 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2440 | make_number (Lisp_Symbol), |
1ab256cb RM |
2441 | "Symbol for current buffer's major mode."); |
2442 | ||
2443 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2444 | make_number (Lisp_String), |
1ab256cb RM |
2445 | "Pretty name of current buffer's major mode (a string)."); |
2446 | ||
0fa3ba92 | 2447 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2448 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2449 | Automatically becomes buffer-local when set in any fashion."); | |
2450 | ||
2451 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2452 | Qnil, |
1ab256cb RM |
2453 | "*Non-nil if searches should ignore case.\n\ |
2454 | Automatically becomes buffer-local when set in any fashion."); | |
2455 | ||
2456 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2457 | make_number (Lisp_Int), |
1ab256cb RM |
2458 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2459 | Automatically becomes buffer-local when set in any fashion."); | |
2460 | ||
2461 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2462 | make_number (Lisp_Int), |
1ab256cb RM |
2463 | "*Column for the default indent-line-function to indent to.\n\ |
2464 | Linefeed indents to this column in Fundamental mode.\n\ | |
2465 | Automatically becomes buffer-local when set in any fashion."); | |
2466 | ||
2467 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2468 | make_number (Lisp_Int), |
1ab256cb RM |
2469 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2470 | Automatically becomes buffer-local when set in any fashion."); | |
2471 | ||
0fa3ba92 | 2472 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2473 | "*Non-nil means display control chars with uparrow.\n\ |
2474 | Nil means use backslash and octal digits.\n\ | |
2475 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2476 | This variable does not apply to characters whose display is specified\n\ | |
2477 | in the current display table (if there is one)."); | |
2478 | ||
0fa3ba92 | 2479 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2480 | "*Non-nil means do not display continuation lines;\n\ |
2481 | give each line of text one screen line.\n\ | |
2482 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2483 | \n\ | |
2484 | Note that this is overridden by the variable\n\ | |
2485 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2486 | and this buffer is not full-frame width."); |
1ab256cb | 2487 | |
54ad07d3 RS |
2488 | #ifdef MSDOS |
2489 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, | |
2490 | Qnil, | |
2491 | "*If visited file is text, nil; otherwise, t."); | |
2492 | #endif | |
2493 | ||
1ab256cb | 2494 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 2495 | make_number (Lisp_String), |
1ab256cb RM |
2496 | "Name of default directory of current buffer. Should end with slash.\n\ |
2497 | Each buffer has its own value of this variable."); | |
2498 | ||
2499 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 2500 | Qnil, |
1ab256cb RM |
2501 | "Function called (if non-nil) to perform auto-fill.\n\ |
2502 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
2503 | Each buffer has its own value of this variable.\n\ | |
2504 | NOTE: This variable is not an ordinary hook;\n\ | |
2505 | It may not be a list of functions."); | |
2506 | ||
2507 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 2508 | make_number (Lisp_String), |
1ab256cb RM |
2509 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
2510 | Each buffer has its own value of this variable."); | |
2511 | ||
2512 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", | |
3f5fcd47 | 2513 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 2514 | make_number (Lisp_String), |
1ab256cb RM |
2515 | "Name of file for auto-saving current buffer,\n\ |
2516 | or nil if buffer should not be auto-saved.\n\ | |
2517 | Each buffer has its own value of this variable."); | |
2518 | ||
0fa3ba92 | 2519 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
2520 | "Non-nil if this buffer is read-only.\n\ |
2521 | Each buffer has its own value of this variable."); | |
2522 | ||
0fa3ba92 | 2523 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
2524 | "Non-nil if this buffer's file has been backed up.\n\ |
2525 | Backing up is done before the first time the file is saved.\n\ | |
2526 | Each buffer has its own value of this variable."); | |
2527 | ||
2528 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 2529 | make_number (Lisp_Int), |
1ab256cb RM |
2530 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
2531 | 0 initially.\n\ | |
2532 | Each buffer has its own value of this variable."); | |
2533 | ||
2534 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 2535 | Qnil, |
1ab256cb RM |
2536 | "Non-nil enables selective display:\n\ |
2537 | Integer N as value means display only lines\n\ | |
2538 | that start with less than n columns of space.\n\ | |
2539 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
2540 | Then ^M's in the file are written into files as newlines.\n\n\ | |
2541 | Automatically becomes buffer-local when set in any fashion."); | |
2542 | ||
2543 | #ifndef old | |
2544 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
2545 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 2546 | Qnil, |
1ab256cb RM |
2547 | "t means display ... on previous line when a line is invisible.\n\ |
2548 | Automatically becomes buffer-local when set in any fashion."); | |
2549 | #endif | |
2550 | ||
0fa3ba92 | 2551 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 2552 | "Non-nil if self-insertion should replace existing text.\n\ |
6bbb0d4a JB |
2553 | If non-nil and not `overwrite-mode-binary', self-insertion still\n\ |
2554 | inserts at the end of a line, and inserts when point is before a tab,\n\ | |
2e94b813 | 2555 | until the tab is filled in.\n\ |
6bbb0d4a | 2556 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
2557 | Automatically becomes buffer-local when set in any fashion."); |
2558 | ||
54939090 RS |
2559 | #if 0 /* The doc string is too long for some compilers, |
2560 | but make-docfile can find it in this comment. */ | |
1ab256cb | 2561 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 2562 | Qnil, |
1ab256cb RM |
2563 | "Display table that controls display of the contents of current buffer.\n\ |
2564 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2565 | The display table is a vector created with `make-display-table'.\n\ | |
2566 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 2567 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 2568 | nil means display the character in the default fashion.\n\ |
6158b3b0 JB |
2569 | The remaining five elements control the display of\n\ |
2570 | the end of a truncated screen line (element 256, a single character);\n\ | |
2571 | the end of a continued line (element 257, a single character);\n\ | |
2572 | the escape character used to display character codes in octal\n\ | |
2573 | (element 258, a single character);\n\ | |
2574 | the character used as an arrow for control characters (element 259,\n\ | |
2575 | a single character);\n\ | |
2576 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
2577 | a vector of characters).\n\ | |
1ab256cb RM |
2578 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
2579 | Each window can have its own, overriding display table."); | |
54939090 RS |
2580 | #endif |
2581 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 2582 | Qnil, 0); |
1ab256cb | 2583 | |
1ab256cb RM |
2584 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
2585 | "Don't ask."); | |
2586 | */ | |
01050cb5 | 2587 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
2588 | "Function to call before each text change.\n\ |
2589 | Two arguments are passed to the function: the positions of\n\ | |
2590 | the beginning and end of the range of old text to be changed.\n\ | |
2591 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2592 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 2593 | \n\ |
5f079267 | 2594 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
2595 | don't call any before-change or after-change functions.\n\ |
2596 | That's because these variables are temporarily set to nil.\n\ | |
2597 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2598 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2599 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
2600 | Vbefore_change_function = Qnil; |
2601 | ||
2602 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
2603 | "Function to call after each text change.\n\ | |
2604 | Three arguments are passed to the function: the positions of\n\ | |
2605 | the beginning and end of the range of changed text,\n\ | |
2606 | and the length of the pre-change text replaced by that range.\n\ | |
2607 | \(For an insertion, the pre-change length is zero;\n\ | |
2608 | for a deletion, that length is the number of characters deleted,\n\ | |
2609 | and the post-change beginning and end are at the same place.)\n\ | |
2610 | \n\ | |
5f079267 | 2611 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
2612 | don't call any before-change or after-change functions.\n\ |
2613 | That's because these variables are temporarily set to nil.\n\ | |
2614 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2615 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2616 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
2617 | Vafter_change_function = Qnil; |
2618 | ||
5f079267 RS |
2619 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
2620 | "List of functions to call before each text change.\n\ | |
2621 | Two arguments are passed to each function: the positions of\n\ | |
2622 | the beginning and end of the range of old text to be changed.\n\ | |
2623 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
2624 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
2625 | \n\ |
2626 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
2627 | don't call any before-change or after-change functions.\n\ |
2628 | That's because these variables are temporarily set to nil.\n\ | |
2629 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2630 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2631 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
2632 | Vbefore_change_functions = Qnil; |
2633 | ||
2634 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
2635 | "List of function to call after each text change.\n\ | |
2636 | Three arguments are passed to each function: the positions of\n\ | |
2637 | the beginning and end of the range of changed text,\n\ | |
2638 | and the length of the pre-change text replaced by that range.\n\ | |
2639 | \(For an insertion, the pre-change length is zero;\n\ | |
2640 | for a deletion, that length is the number of characters deleted,\n\ | |
2641 | and the post-change beginning and end are at the same place.)\n\ | |
2642 | \n\ | |
2643 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
2644 | don't call any before-change or after-change functions.\n\ |
2645 | That's because these variables are temporarily set to nil.\n\ | |
2646 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
2647 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 2648 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 2649 | |
5f079267 RS |
2650 | Vafter_change_functions = Qnil; |
2651 | ||
dbc4e1c1 JB |
2652 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
2653 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
2654 | The functions are run using the `run-hooks' function."); | |
2655 | Vfirst_change_hook = Qnil; | |
2656 | Qfirst_change_hook = intern ("first-change-hook"); | |
2657 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 2658 | |
54939090 RS |
2659 | #if 0 /* The doc string is too long for some compilers, |
2660 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 2661 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
2662 | "List of undo entries in current buffer.\n\ |
2663 | Recent changes come first; older changes follow newer.\n\ | |
2664 | \n\ | |
2665 | An entry (START . END) represents an insertion which begins at\n\ | |
2666 | position START and ends at position END.\n\ | |
2667 | \n\ | |
2668 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
2669 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
2670 | of the text being deleted; if negative, point was at the end.\n\ | |
2671 | \n\ | |
2672 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ | |
2673 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ | |
2674 | 16-bit words of the buffer's modification count at the time. If the\n\ | |
2675 | modification count of the most recent save is different, this entry is\n\ | |
2676 | obsolete.\n\ | |
2677 | \n\ | |
483c1fd3 RS |
2678 | An entry (nil PROP VAL BEG . END) indicates that a text property\n\ |
2679 | was modified between BEG and END. PROP is the property name,\n\ | |
2680 | and VAL is the old value.\n\ | |
2681 | \n\ | |
bec44fd6 JB |
2682 | An entry of the form POSITION indicates that point was at the buffer\n\ |
2683 | location given by the integer. Undoing an entry of this form places\n\ | |
2684 | point at POSITION.\n\ | |
2685 | \n\ | |
1ab256cb RM |
2686 | nil marks undo boundaries. The undo command treats the changes\n\ |
2687 | between two undo boundaries as a single step to be undone.\n\ | |
2688 | \n\ | |
bec44fd6 | 2689 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
2690 | #endif |
2691 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 2692 | 0); |
1ab256cb | 2693 | |
c48f61ef RS |
2694 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
2695 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
2696 | Automatically local in all buffers."); | |
2697 | ||
2698 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, | |
2699 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
2700 | Vtransient_mark_mode = Qnil; | |
2701 | ||
0a4469c9 | 2702 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
2703 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
2704 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
2705 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
2706 | and disregard a `read-only' text property if the property value\n\ | |
2707 | is a member of the list."); | |
2708 | Vinhibit_read_only = Qnil; | |
2709 | ||
dcdffbf6 RS |
2710 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
2711 | "List of functions called with no args to query before killing a buffer."); | |
2712 | Vkill_buffer_query_functions = Qnil; | |
2713 | ||
1ab256cb RM |
2714 | defsubr (&Sbuffer_list); |
2715 | defsubr (&Sget_buffer); | |
2716 | defsubr (&Sget_file_buffer); | |
2717 | defsubr (&Sget_buffer_create); | |
01050cb5 | 2718 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
2719 | defsubr (&Sbuffer_name); |
2720 | /*defsubr (&Sbuffer_number);*/ | |
2721 | defsubr (&Sbuffer_file_name); | |
2722 | defsubr (&Sbuffer_local_variables); | |
2723 | defsubr (&Sbuffer_modified_p); | |
2724 | defsubr (&Sset_buffer_modified_p); | |
2725 | defsubr (&Sbuffer_modified_tick); | |
2726 | defsubr (&Srename_buffer); | |
2727 | defsubr (&Sother_buffer); | |
2728 | defsubr (&Sbuffer_disable_undo); | |
2729 | defsubr (&Sbuffer_enable_undo); | |
2730 | defsubr (&Skill_buffer); | |
2731 | defsubr (&Serase_buffer); | |
2732 | defsubr (&Sswitch_to_buffer); | |
2733 | defsubr (&Spop_to_buffer); | |
2734 | defsubr (&Scurrent_buffer); | |
2735 | defsubr (&Sset_buffer); | |
2736 | defsubr (&Sbarf_if_buffer_read_only); | |
2737 | defsubr (&Sbury_buffer); | |
2738 | defsubr (&Slist_buffers); | |
2739 | defsubr (&Skill_all_local_variables); | |
2eec3b4e | 2740 | |
52f8ec73 | 2741 | defsubr (&Soverlayp); |
2eec3b4e RS |
2742 | defsubr (&Smake_overlay); |
2743 | defsubr (&Sdelete_overlay); | |
2744 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
2745 | defsubr (&Soverlay_start); |
2746 | defsubr (&Soverlay_end); | |
2747 | defsubr (&Soverlay_buffer); | |
2748 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
2749 | defsubr (&Soverlays_at); |
2750 | defsubr (&Snext_overlay_change); | |
2751 | defsubr (&Soverlay_recenter); | |
2752 | defsubr (&Soverlay_lists); | |
2753 | defsubr (&Soverlay_get); | |
2754 | defsubr (&Soverlay_put); | |
1ab256cb RM |
2755 | } |
2756 | ||
2757 | keys_of_buffer () | |
2758 | { | |
2759 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
2760 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
2761 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); | |
4158c17d RM |
2762 | |
2763 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
2764 | initialized when that function gets called. */ | |
2765 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 2766 | } |