Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
187ccf49 KS |
2 | Copyright (C) 1985, 86, 87, 88, 89, 93, 94, 95, 97, 98, 99, |
3 | 2000, 01, 02, 03, 04, 2005 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 | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
1ab256cb | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 23 | |
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
9dde47f5 | 29 | |
2538fae4 | 30 | #ifndef USE_CRT_DLL |
9dde47f5 | 31 | extern int errno; |
2538fae4 | 32 | #endif |
1ab256cb RM |
33 | |
34 | #ifndef MAXPATHLEN | |
c2d5b10f | 35 | /* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */ |
1ab256cb RM |
36 | #define MAXPATHLEN 1024 |
37 | #endif /* not MAXPATHLEN */ | |
38 | ||
dfcf069d AS |
39 | #ifdef HAVE_UNISTD_H |
40 | #include <unistd.h> | |
41 | #endif | |
7ee72033 | 42 | |
1ab256cb | 43 | #include "lisp.h" |
21cf4cf8 | 44 | #include "intervals.h" |
1ab256cb RM |
45 | #include "window.h" |
46 | #include "commands.h" | |
47 | #include "buffer.h" | |
3b06f880 | 48 | #include "charset.h" |
28e969dd | 49 | #include "region-cache.h" |
1ab256cb | 50 | #include "indent.h" |
d014bf88 | 51 | #include "blockinput.h" |
2538fae4 | 52 | #include "keyboard.h" |
e35f6ff7 | 53 | #include "keymap.h" |
08460cd4 | 54 | #include "frame.h" |
1ab256cb RM |
55 | |
56 | struct buffer *current_buffer; /* the current buffer */ | |
57 | ||
58 | /* First buffer in chain of all buffers (in reverse order of creation). | |
59 | Threaded through ->next. */ | |
60 | ||
61 | struct buffer *all_buffers; | |
62 | ||
63 | /* This structure holds the default values of the buffer-local variables | |
64 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
65 | The default value occupies the same slot in this structure | |
66 | as an individual buffer's value occupies in that buffer. | |
67 | Setting the default value also goes through the alist of buffers | |
68 | and stores into each buffer that does not say it has a local value. */ | |
69 | ||
d4f8198b | 70 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
71 | |
72 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
73 | ||
74 | static Lisp_Object Vbuffer_defaults; | |
75 | ||
76 | /* This structure marks which slots in a buffer have corresponding | |
77 | default values in buffer_defaults. | |
78 | Each such slot has a nonzero value in this structure. | |
79 | The value has only one nonzero bit. | |
80 | ||
81 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
82 | the entry for that slot (found in the same slot in this structure) |
83 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
84 | |
85 | If a slot in this structure is -1, then even though there may | |
86 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
87 | and the corresponding slot in buffer_defaults is not used. | |
88 | ||
89 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
90 | but there is a default value which is copied into each buffer. | |
91 | ||
1ab256cb RM |
92 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
93 | zero, that is a bug */ | |
94 | ||
95 | struct buffer buffer_local_flags; | |
96 | ||
97 | /* This structure holds the names of symbols whose values may be | |
98 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
99 | ||
d4f8198b SM |
100 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
101 | ||
1ab256cb RM |
102 | /* A Lisp_Object pointer to the above, used for staticpro */ |
103 | static Lisp_Object Vbuffer_local_symbols; | |
104 | ||
0fa3ba92 JB |
105 | /* This structure holds the required types for the values in the |
106 | buffer-local slots. If a slot contains Qnil, then the | |
107 | corresponding buffer slot may contain a value of any type. If a | |
108 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
109 | equal to that integer (except nil is always allowed). |
110 | When a tag does not match, the function | |
111 | buffer_slot_type_mismatch will signal an error. | |
112 | ||
113 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
114 | struct buffer buffer_local_types; |
115 | ||
13de9290 RS |
116 | /* Flags indicating which built-in buffer-local variables |
117 | are permanent locals. */ | |
7313acd0 | 118 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
119 | |
120 | /* Number of per-buffer variables used. */ | |
121 | ||
7313acd0 | 122 | int last_per_buffer_idx; |
13de9290 | 123 | |
1ab256cb | 124 | Lisp_Object Fset_buffer (); |
01050cb5 | 125 | void set_buffer_internal (); |
c7aa5005 | 126 | void set_buffer_internal_1 (); |
173f2a64 | 127 | static void call_overlay_mod_hooks (); |
2f3f993b | 128 | static void swap_out_buffer_local_variables (); |
13de9290 | 129 | static void reset_buffer_local_variables (); |
1ab256cb RM |
130 | |
131 | /* Alist of all buffer names vs the buffers. */ | |
132 | /* This used to be a variable, but is no longer, | |
133 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
134 | Lisp_Object Vbuffer_alist; | |
135 | ||
136 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
137 | Lisp_Object Vbefore_change_functions; |
138 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 139 | |
c48f61ef RS |
140 | Lisp_Object Vtransient_mark_mode; |
141 | ||
a96b68f1 RS |
142 | /* t means ignore all read-only text properties. |
143 | A list means ignore such a property if its value is a member of the list. | |
144 | Any non-nil value means ignore buffer-read-only. */ | |
145 | Lisp_Object Vinhibit_read_only; | |
146 | ||
dcdffbf6 RS |
147 | /* List of functions to call that can query about killing a buffer. |
148 | If any of these functions returns nil, we don't kill it. */ | |
149 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 150 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 151 | |
dbc4e1c1 JB |
152 | /* List of functions to call before changing an unmodified buffer. */ |
153 | Lisp_Object Vfirst_change_hook; | |
22378665 | 154 | |
dbc4e1c1 | 155 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
156 | Lisp_Object Qbefore_change_functions; |
157 | Lisp_Object Qafter_change_functions; | |
48265e61 | 158 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 159 | |
7775635d KH |
160 | /* If nonzero, all modification hooks are suppressed. */ |
161 | int inhibit_modification_hooks; | |
162 | ||
1ab256cb RM |
163 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
164 | ||
165 | Lisp_Object Qprotected_field; | |
166 | ||
167 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
168 | ||
169 | Lisp_Object Qkill_buffer_hook; | |
170 | ||
5fe0b67e RS |
171 | Lisp_Object Qget_file_buffer; |
172 | ||
52f8ec73 JB |
173 | Lisp_Object Qoverlayp; |
174 | ||
bbbe9545 | 175 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 176 | |
294d215f RS |
177 | Lisp_Object Qmodification_hooks; |
178 | Lisp_Object Qinsert_in_front_hooks; | |
179 | Lisp_Object Qinsert_behind_hooks; | |
180 | ||
b86af064 GM |
181 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
182 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 183 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 184 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
e1688f54 | 185 | static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); |
b86af064 GM |
186 | |
187 | ||
1ab256cb RM |
188 | /* For debugging; temporary. See set_buffer_internal. */ |
189 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
190 | ||
01136e9b | 191 | void |
1ab256cb RM |
192 | nsberror (spec) |
193 | Lisp_Object spec; | |
194 | { | |
a7a60ce9 | 195 | if (STRINGP (spec)) |
d5db4077 | 196 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
197 | error ("Invalid buffer argument"); |
198 | } | |
199 | \f | |
0dc88e60 | 200 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
201 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
202 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
203 | (object) | |
0dc88e60 RS |
204 | Lisp_Object object; |
205 | { | |
206 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
207 | ? Qt : Qnil); | |
208 | } | |
209 | ||
08460cd4 | 210 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 211 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
212 | If the optional arg FRAME is a frame, we return the buffer list |
213 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
214 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 215 | (frame) |
08460cd4 | 216 | Lisp_Object frame; |
1ab256cb | 217 | { |
08460cd4 RS |
218 | Lisp_Object framelist, general; |
219 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
220 | ||
221 | if (FRAMEP (frame)) | |
222 | { | |
223 | Lisp_Object tail; | |
224 | ||
b7826503 | 225 | CHECK_FRAME (frame); |
08460cd4 RS |
226 | |
227 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
228 | ||
229 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
230 | tail = framelist; | |
231 | while (! NILP (tail)) | |
232 | { | |
7539e11f KR |
233 | general = Fdelq (XCAR (tail), general); |
234 | tail = XCDR (tail); | |
08460cd4 RS |
235 | } |
236 | return nconc2 (framelist, general); | |
237 | } | |
238 | ||
239 | return general; | |
1ab256cb RM |
240 | } |
241 | ||
04ae1b48 RS |
242 | /* Like Fassoc, but use Fstring_equal to compare |
243 | (which ignores text properties), | |
244 | and don't ever QUIT. */ | |
245 | ||
246 | static Lisp_Object | |
247 | assoc_ignore_text_properties (key, list) | |
248 | register Lisp_Object key; | |
249 | Lisp_Object list; | |
250 | { | |
251 | register Lisp_Object tail; | |
6d70a280 | 252 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
253 | { |
254 | register Lisp_Object elt, tem; | |
6d70a280 | 255 | elt = XCAR (tail); |
04ae1b48 RS |
256 | tem = Fstring_equal (Fcar (elt), key); |
257 | if (!NILP (tem)) | |
258 | return elt; | |
259 | } | |
260 | return Qnil; | |
261 | } | |
262 | ||
1ab256cb | 263 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 264 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 265 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
266 | NAME may also be a buffer; if so, the value is that buffer. */) |
267 | (name) | |
1ab256cb RM |
268 | register Lisp_Object name; |
269 | { | |
a7a60ce9 | 270 | if (BUFFERP (name)) |
1ab256cb | 271 | return name; |
b7826503 | 272 | CHECK_STRING (name); |
1ab256cb | 273 | |
04ae1b48 | 274 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
275 | } |
276 | ||
277 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 278 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
279 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
280 | If there is no such live buffer, return nil. | |
7ee72033 MB |
281 | See also `find-buffer-visiting'. */) |
282 | (filename) | |
1ab256cb RM |
283 | register Lisp_Object filename; |
284 | { | |
285 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
286 | Lisp_Object handler; |
287 | ||
b7826503 | 288 | CHECK_STRING (filename); |
1ab256cb RM |
289 | filename = Fexpand_file_name (filename, Qnil); |
290 | ||
5fe0b67e RS |
291 | /* If the file name has special constructs in it, |
292 | call the corresponding file handler. */ | |
a617e913 | 293 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
294 | if (!NILP (handler)) |
295 | return call2 (handler, Qget_file_buffer, filename); | |
296 | ||
7539e11f | 297 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 298 | { |
7539e11f | 299 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
300 | if (!BUFFERP (buf)) continue; |
301 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 302 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 303 | if (!NILP (tem)) |
1ab256cb RM |
304 | return buf; |
305 | } | |
306 | return Qnil; | |
307 | } | |
308 | ||
52e01189 RS |
309 | Lisp_Object |
310 | get_truename_buffer (filename) | |
311 | register Lisp_Object filename; | |
312 | { | |
313 | register Lisp_Object tail, buf, tem; | |
314 | ||
7539e11f | 315 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 316 | { |
7539e11f | 317 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
318 | if (!BUFFERP (buf)) continue; |
319 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
320 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
321 | if (!NILP (tem)) | |
322 | return buf; | |
323 | } | |
324 | return Qnil; | |
325 | } | |
326 | ||
1ab256cb RM |
327 | /* Incremented for each buffer created, to assign the buffer number. */ |
328 | int buffer_count; | |
329 | ||
330 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 331 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
332 | A new buffer is created if there is no live buffer named NAME. |
333 | If NAME starts with a space, the new buffer does not keep undo information. | |
334 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
335 | The value is never nil. */) |
336 | (name) | |
1ab256cb RM |
337 | register Lisp_Object name; |
338 | { | |
a9ee7a59 | 339 | register Lisp_Object buf; |
1ab256cb RM |
340 | register struct buffer *b; |
341 | ||
342 | buf = Fget_buffer (name); | |
265a9e55 | 343 | if (!NILP (buf)) |
1ab256cb RM |
344 | return buf; |
345 | ||
d5db4077 | 346 | if (SCHARS (name) == 0) |
31cd83e9 KH |
347 | error ("Empty string for buffer name is not allowed"); |
348 | ||
a21260d9 | 349 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 350 | |
336cd056 RS |
351 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
352 | ||
353 | /* An ordinary buffer uses its own struct buffer_text. */ | |
354 | b->text = &b->own_text; | |
355 | b->base_buffer = 0; | |
356 | ||
1ab256cb | 357 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 358 | BLOCK_INPUT; |
3b06f880 KH |
359 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
360 | anchoring a search. */ | |
b86af064 | 361 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 362 | UNBLOCK_INPUT; |
1ab256cb | 363 | if (! BUF_BEG_ADDR (b)) |
81841847 | 364 | buffer_memory_full (); |
1ab256cb | 365 | |
6d70a280 SM |
366 | BUF_PT (b) = BEG; |
367 | BUF_GPT (b) = BEG; | |
368 | BUF_BEGV (b) = BEG; | |
369 | BUF_ZV (b) = BEG; | |
370 | BUF_Z (b) = BEG; | |
371 | BUF_PT_BYTE (b) = BEG_BYTE; | |
372 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
373 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
374 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
375 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 376 | BUF_MODIFF (b) = 1; |
2509d356 | 377 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
378 | BUF_SAVE_MODIFF (b) = 1; |
379 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
380 | BUF_UNCHANGED_MODIFIED (b) = 1; |
381 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
382 | BUF_END_UNCHANGED (b) = 0; | |
383 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 384 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 385 | |
28e969dd JB |
386 | b->newline_cache = 0; |
387 | b->width_run_cache = 0; | |
388 | b->width_table = Qnil; | |
b5a225b4 | 389 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 390 | |
1ab256cb RM |
391 | /* Put this on the chain of all buffers including killed ones. */ |
392 | b->next = all_buffers; | |
393 | all_buffers = b; | |
394 | ||
336cd056 RS |
395 | /* An ordinary buffer normally doesn't need markers |
396 | to handle BEGV and ZV. */ | |
397 | b->pt_marker = Qnil; | |
398 | b->begv_marker = Qnil; | |
399 | b->zv_marker = Qnil; | |
04ae1b48 RS |
400 | |
401 | name = Fcopy_sequence (name); | |
ab77f05c | 402 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 403 | b->name = name; |
04ae1b48 | 404 | |
d5db4077 | 405 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
406 | b->undo_list = Qnil; |
407 | else | |
408 | b->undo_list = Qt; | |
409 | ||
410 | reset_buffer (b); | |
13de9290 | 411 | reset_buffer_local_variables (b, 1); |
1ab256cb | 412 | |
1f57cb74 | 413 | b->mark = Fmake_marker (); |
65745fad | 414 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
415 | b->name = name; |
416 | ||
1ab256cb | 417 | /* Put this in the alist of all live buffers. */ |
67180c6a | 418 | XSETBUFFER (buf, b); |
1ab256cb RM |
419 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
420 | ||
d36b182f DL |
421 | /* An error in calling the function here (should someone redfine it) |
422 | can lead to infinite regress until you run out of stack. rms | |
423 | says that's not worth protecting against. */ | |
48265e61 | 424 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 425 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
426 | call1 (Qucs_set_table_for_input, buf); |
427 | ||
336cd056 RS |
428 | return buf; |
429 | } | |
430 | ||
7e9d5818 | 431 | |
04e4cb3a GM |
432 | /* Return a list of overlays which is a copy of the overlay list |
433 | LIST, but for buffer B. */ | |
434 | ||
2410d73a | 435 | static struct Lisp_Overlay * |
04e4cb3a GM |
436 | copy_overlays (b, list) |
437 | struct buffer *b; | |
2410d73a | 438 | struct Lisp_Overlay *list; |
04e4cb3a | 439 | { |
2410d73a SM |
440 | Lisp_Object buffer; |
441 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
442 | |
443 | XSETBUFFER (buffer, b); | |
444 | ||
2410d73a | 445 | for (; list; list = list->next) |
04e4cb3a GM |
446 | { |
447 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 448 | EMACS_INT charpos; |
04e4cb3a | 449 | |
2410d73a | 450 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
451 | charpos = marker_position (OVERLAY_START (old_overlay)); |
452 | start = Fmake_marker (); | |
db3a49a6 | 453 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
454 | XMARKER (start)->insertion_type |
455 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
456 | ||
457 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
458 | end = Fmake_marker (); | |
db3a49a6 | 459 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
460 | XMARKER (end)->insertion_type |
461 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
462 | ||
463 | overlay = allocate_misc (); | |
464 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
465 | OVERLAY_START (overlay) = start; | |
466 | OVERLAY_END (overlay) = end; | |
467 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 468 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 469 | |
2410d73a SM |
470 | if (tail) |
471 | tail = tail->next = XOVERLAY (overlay); | |
472 | else | |
473 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
474 | } |
475 | ||
2410d73a | 476 | return result; |
04e4cb3a | 477 | } |
177c0ea7 | 478 | |
04e4cb3a | 479 | |
7e9d5818 GM |
480 | /* Clone per-buffer values of buffer FROM. |
481 | ||
482 | Buffer TO gets the same per-buffer values as FROM, with the | |
483 | following exceptions: (1) TO's name is left untouched, (2) markers | |
484 | are copied and made to refer to TO, and (3) overlay lists are | |
485 | copied. */ | |
486 | ||
487 | static void | |
488 | clone_per_buffer_values (from, to) | |
489 | struct buffer *from, *to; | |
490 | { | |
02f28bbd | 491 | Lisp_Object to_buffer, tem; |
7e9d5818 GM |
492 | int offset; |
493 | ||
494 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 495 | |
7e9d5818 GM |
496 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); |
497 | offset < sizeof *to; | |
498 | offset += sizeof (Lisp_Object)) | |
499 | { | |
500 | Lisp_Object obj; | |
501 | ||
502 | obj = PER_BUFFER_VALUE (from, offset); | |
503 | if (MARKERP (obj)) | |
504 | { | |
505 | struct Lisp_Marker *m = XMARKER (obj); | |
506 | obj = Fmake_marker (); | |
507 | XMARKER (obj)->insertion_type = m->insertion_type; | |
508 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
509 | } | |
510 | ||
511 | PER_BUFFER_VALUE (to, offset) = obj; | |
512 | } | |
513 | ||
7e9d5818 | 514 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 515 | |
04e4cb3a GM |
516 | to->overlays_before = copy_overlays (to, from->overlays_before); |
517 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 518 | |
e1688f54 RS |
519 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
520 | and install that in TO. */ | |
521 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
522 | } |
523 | ||
7e9d5818 GM |
524 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
525 | 2, 3, | |
193c3837 | 526 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 527 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
c9aac8e6 | 528 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
529 | NAME should be a string which is not the name of an existing buffer. |
530 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
531 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
532 | CLONE nil means the indirect buffer's state is reset to default values. */) |
533 | (base_buffer, name, clone) | |
7e9d5818 | 534 | Lisp_Object base_buffer, name, clone; |
336cd056 | 535 | { |
c9aac8e6 | 536 | Lisp_Object buf, tem; |
7e9d5818 | 537 | struct buffer *b; |
336cd056 | 538 | |
ab53e065 | 539 | CHECK_STRING (name); |
336cd056 RS |
540 | buf = Fget_buffer (name); |
541 | if (!NILP (buf)) | |
d5db4077 | 542 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 543 | |
c9aac8e6 | 544 | tem = base_buffer; |
336cd056 RS |
545 | base_buffer = Fget_buffer (base_buffer); |
546 | if (NILP (base_buffer)) | |
c9aac8e6 LT |
547 | error ("No such buffer: `%s'", SDATA (tem)); |
548 | if (NILP (XBUFFER (base_buffer)->name)) | |
549 | error ("Base buffer has been killed"); | |
336cd056 | 550 | |
d5db4077 | 551 | if (SCHARS (name) == 0) |
336cd056 RS |
552 | error ("Empty string for buffer name is not allowed"); |
553 | ||
a21260d9 | 554 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
555 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
556 | ||
557 | if (XBUFFER (base_buffer)->base_buffer) | |
558 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
559 | else | |
560 | b->base_buffer = XBUFFER (base_buffer); | |
561 | ||
562 | /* Use the base buffer's text object. */ | |
563 | b->text = b->base_buffer->text; | |
564 | ||
565 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
566 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
567 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
568 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
569 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
570 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
571 | |
572 | b->newline_cache = 0; | |
573 | b->width_run_cache = 0; | |
574 | b->width_table = Qnil; | |
575 | ||
576 | /* Put this on the chain of all buffers including killed ones. */ | |
577 | b->next = all_buffers; | |
578 | all_buffers = b; | |
579 | ||
580 | name = Fcopy_sequence (name); | |
ab77f05c | 581 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
582 | b->name = name; |
583 | ||
584 | reset_buffer (b); | |
13de9290 | 585 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
586 | |
587 | /* Put this in the alist of all live buffers. */ | |
588 | XSETBUFFER (buf, b); | |
589 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
590 | ||
591 | b->mark = Fmake_marker (); | |
1ab256cb | 592 | b->name = name; |
336cd056 | 593 | |
abc9d959 RS |
594 | /* The multibyte status belongs to the base buffer. */ |
595 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
596 | ||
336cd056 RS |
597 | /* Make sure the base buffer has markers for its narrowing. */ |
598 | if (NILP (b->base_buffer->pt_marker)) | |
599 | { | |
600 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
601 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
602 | BUF_PT (b->base_buffer), | |
603 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
604 | } |
605 | if (NILP (b->base_buffer->begv_marker)) | |
606 | { | |
607 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
608 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
609 | BUF_BEGV (b->base_buffer), | |
610 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
611 | } |
612 | if (NILP (b->base_buffer->zv_marker)) | |
613 | { | |
614 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
615 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
616 | BUF_ZV (b->base_buffer), | |
617 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 618 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
619 | } |
620 | ||
7e9d5818 GM |
621 | if (NILP (clone)) |
622 | { | |
623 | /* Give the indirect buffer markers for its narrowing. */ | |
624 | b->pt_marker = Fmake_marker (); | |
625 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
626 | b->begv_marker = Fmake_marker (); | |
627 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
628 | b->zv_marker = Fmake_marker (); | |
629 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
630 | XMARKER (b->zv_marker)->insertion_type = 1; | |
631 | } | |
632 | else | |
7fa57e45 RS |
633 | { |
634 | struct buffer *old_b = current_buffer; | |
635 | ||
636 | clone_per_buffer_values (b->base_buffer, b); | |
637 | b->filename = Qnil; | |
638 | b->file_truename = Qnil; | |
639 | b->display_count = make_number (0); | |
640 | b->backed_up = Qnil; | |
641 | b->auto_save_file_name = Qnil; | |
642 | set_buffer_internal_1 (b); | |
643 | Fset (intern ("buffer-save-without-query"), Qnil); | |
644 | Fset (intern ("buffer-file-number"), Qnil); | |
645 | Fset (intern ("buffer-stale-function"), Qnil); | |
646 | set_buffer_internal_1 (old_b); | |
647 | } | |
336cd056 | 648 | |
a9ee7a59 | 649 | return buf; |
1ab256cb RM |
650 | } |
651 | ||
d4f5719a SM |
652 | void |
653 | delete_all_overlays (b) | |
654 | struct buffer *b; | |
655 | { | |
656 | Lisp_Object overlay; | |
657 | ||
658 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
659 | have to empty the list, otherwise we end up with overlays that | |
660 | think they belong to this buffer while the buffer doesn't know about | |
661 | them any more. */ | |
662 | while (b->overlays_before) | |
663 | { | |
664 | XSETMISC (overlay, b->overlays_before); | |
665 | Fdelete_overlay (overlay); | |
666 | } | |
667 | while (b->overlays_after) | |
668 | { | |
669 | XSETMISC (overlay, b->overlays_after); | |
670 | Fdelete_overlay (overlay); | |
671 | } | |
672 | eassert (b->overlays_before == NULL); | |
673 | eassert (b->overlays_after == NULL); | |
674 | } | |
675 | ||
bcd40520 | 676 | /* Reinitialize everything about a buffer except its name and contents |
c9aac8e6 | 677 | and local variables. |
d4f5719a SM |
678 | If called on an already-initialized buffer, the list of overlays |
679 | should be deleted before calling this function, otherwise we end up | |
680 | with overlays that claim to belong to the buffer but the buffer | |
681 | claims it doesn't belong to it. */ | |
1ab256cb RM |
682 | |
683 | void | |
684 | reset_buffer (b) | |
685 | register struct buffer *b; | |
686 | { | |
687 | b->filename = Qnil; | |
f6ed2e84 | 688 | b->file_truename = Qnil; |
1ab256cb RM |
689 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
690 | b->modtime = 0; | |
8d7a4592 | 691 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 692 | b->last_window_start = 1; |
8b264726 | 693 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
694 | b->clip_changed = 0; |
695 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
696 | b->backed_up = Qnil; |
697 | b->auto_save_modified = 0; | |
84f6bcba | 698 | b->auto_save_failure_time = -1; |
1ab256cb RM |
699 | b->auto_save_file_name = Qnil; |
700 | b->read_only = Qnil; | |
2410d73a SM |
701 | b->overlays_before = NULL; |
702 | b->overlays_after = NULL; | |
c2d5b10f | 703 | b->overlay_center = BEG; |
dfda7a7f | 704 | b->mark_active = Qnil; |
943e065b | 705 | b->point_before_scroll = Qnil; |
be9aafdd | 706 | b->file_format = Qnil; |
71ed49fa | 707 | b->auto_save_file_format = Qt; |
0dc6f165 | 708 | b->last_selected_window = Qnil; |
7962a441 | 709 | XSETINT (b->display_count, 0); |
3fd364db | 710 | b->display_time = Qnil; |
1bf08baf | 711 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 712 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 713 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
714 | |
715 | b->display_error_modiff = 0; | |
1ab256cb RM |
716 | } |
717 | ||
bcd40520 RS |
718 | /* Reset buffer B's local variables info. |
719 | Don't use this on a buffer that has already been in use; | |
720 | it does not treat permanent locals consistently. | |
13de9290 RS |
721 | Instead, use Fkill_all_local_variables. |
722 | ||
723 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
724 | buffer-local variables. If PERMANENT_TOO is 0, | |
725 | we preserve those. */ | |
bcd40520 | 726 | |
13de9290 RS |
727 | static void |
728 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 729 | register struct buffer *b; |
13de9290 | 730 | int permanent_too; |
1ab256cb RM |
731 | { |
732 | register int offset; | |
7c02e886 | 733 | int i; |
1ab256cb RM |
734 | |
735 | /* Reset the major mode to Fundamental, together with all the | |
736 | things that depend on the major mode. | |
737 | default-major-mode is handled at a higher level. | |
738 | We ignore it here. */ | |
739 | b->major_mode = Qfundamental_mode; | |
740 | b->keymap = Qnil; | |
1ab256cb RM |
741 | b->mode_name = QSFundamental; |
742 | b->minor_modes = Qnil; | |
3446af9c RS |
743 | |
744 | /* If the standard case table has been altered and invalidated, | |
745 | fix up its insides first. */ | |
746 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
747 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
748 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
749 | Fset_standard_case_table (Vascii_downcase_table); | |
750 | ||
1ab256cb | 751 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
752 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
753 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
754 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 755 | b->invisibility_spec = Qt; |
2e716096 RS |
756 | #ifndef DOS_NT |
757 | b->buffer_file_type = Qnil; | |
758 | #endif | |
3cb719bd | 759 | |
13de9290 | 760 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 761 | b->local_var_alist = Qnil; |
7313acd0 | 762 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 763 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 764 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
765 | |
766 | /* For each slot that has a default value, | |
767 | copy that into the slot. */ | |
768 | ||
7313acd0 | 769 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
770 | offset < sizeof *b; |
771 | offset += sizeof (Lisp_Object)) | |
aab80822 | 772 | { |
7313acd0 | 773 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
774 | if ((idx > 0 |
775 | && (permanent_too | |
776 | || buffer_permanent_local_flags[idx] == 0)) | |
777 | /* Is -2 used anywhere? */ | |
778 | || idx == -2) | |
7313acd0 | 779 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 780 | } |
1ab256cb RM |
781 | } |
782 | ||
01050cb5 RM |
783 | /* We split this away from generate-new-buffer, because rename-buffer |
784 | and set-visited-file-name ought to be able to use this to really | |
785 | rename the buffer properly. */ | |
786 | ||
787 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 788 | 1, 2, 0, |
7ee72033 | 789 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
790 | If there is no live buffer named NAME, then return NAME. |
791 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
54dffe35 | 792 | \(starting at 2) until an unused name is found, and then return that name. |
018ba359 PJ |
793 | Optional second argument IGNORE specifies a name that is okay to use |
794 | \(if it is in the sequence to be tried) | |
7ee72033 MB |
795 | even if a buffer with that name exists. */) |
796 | (name, ignore) | |
c273e647 | 797 | register Lisp_Object name, ignore; |
1ab256cb RM |
798 | { |
799 | register Lisp_Object gentemp, tem; | |
800 | int count; | |
801 | char number[10]; | |
802 | ||
b7826503 | 803 | CHECK_STRING (name); |
1ab256cb | 804 | |
54dffe35 LT |
805 | tem = Fstring_equal (name, ignore); |
806 | if (!NILP (tem)) | |
807 | return name; | |
1ab256cb | 808 | tem = Fget_buffer (name); |
265a9e55 | 809 | if (NILP (tem)) |
01050cb5 | 810 | return name; |
1ab256cb RM |
811 | |
812 | count = 1; | |
813 | while (1) | |
814 | { | |
815 | sprintf (number, "<%d>", ++count); | |
816 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 817 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
818 | if (!NILP (tem)) |
819 | return gentemp; | |
1ab256cb | 820 | tem = Fget_buffer (gentemp); |
265a9e55 | 821 | if (NILP (tem)) |
01050cb5 | 822 | return gentemp; |
1ab256cb RM |
823 | } |
824 | } | |
825 | ||
826 | \f | |
827 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
828 | doc: /* Return the name of BUFFER, as a string. |
829 | With no argument or nil as argument, return the name of the current buffer. */) | |
830 | (buffer) | |
1ab256cb RM |
831 | register Lisp_Object buffer; |
832 | { | |
265a9e55 | 833 | if (NILP (buffer)) |
1ab256cb | 834 | return current_buffer->name; |
b7826503 | 835 | CHECK_BUFFER (buffer); |
1ab256cb RM |
836 | return XBUFFER (buffer)->name; |
837 | } | |
838 | ||
839 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
840 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
841 | No argument or nil as argument means use the current buffer. */) | |
842 | (buffer) | |
1ab256cb RM |
843 | register Lisp_Object buffer; |
844 | { | |
265a9e55 | 845 | if (NILP (buffer)) |
1ab256cb | 846 | return current_buffer->filename; |
b7826503 | 847 | CHECK_BUFFER (buffer); |
1ab256cb RM |
848 | return XBUFFER (buffer)->filename; |
849 | } | |
850 | ||
336cd056 RS |
851 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
852 | 0, 1, 0, | |
7ee72033 | 853 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
854 | If BUFFER is not indirect, return nil. |
855 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 856 | (buffer) |
336cd056 RS |
857 | register Lisp_Object buffer; |
858 | { | |
859 | struct buffer *base; | |
860 | Lisp_Object base_buffer; | |
861 | ||
862 | if (NILP (buffer)) | |
863 | base = current_buffer->base_buffer; | |
864 | else | |
865 | { | |
b7826503 | 866 | CHECK_BUFFER (buffer); |
336cd056 RS |
867 | base = XBUFFER (buffer)->base_buffer; |
868 | } | |
869 | ||
870 | if (! base) | |
871 | return Qnil; | |
872 | XSETBUFFER (base_buffer, base); | |
873 | return base_buffer; | |
874 | } | |
875 | ||
79aa712d | 876 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 877 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
878 | doc: /* Return the value of VARIABLE in BUFFER. |
879 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
880 | is the default binding of the variable. */) |
881 | (variable, buffer) | |
882 | register Lisp_Object variable; | |
79aa712d RS |
883 | register Lisp_Object buffer; |
884 | { | |
885 | register struct buffer *buf; | |
886 | register Lisp_Object result; | |
887 | ||
5e2ad10b | 888 | CHECK_SYMBOL (variable); |
ae69175b | 889 | CHECK_BUFFER (buffer); |
79aa712d RS |
890 | buf = XBUFFER (buffer); |
891 | ||
0e4d0c9a RS |
892 | if (SYMBOLP (variable)) |
893 | variable = indirect_variable (variable); | |
894 | ||
79aa712d | 895 | /* Look in local_var_list */ |
5e2ad10b | 896 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 897 | if (NILP (result)) |
79aa712d RS |
898 | { |
899 | int offset, idx; | |
900 | int found = 0; | |
901 | ||
902 | /* Look in special slots */ | |
903 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
904 | offset < sizeof (struct buffer); | |
905 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
906 | offset += (sizeof (EMACS_INT))) | |
907 | { | |
908 | idx = PER_BUFFER_IDX (offset); | |
909 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 910 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 911 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
912 | { |
913 | result = PER_BUFFER_VALUE (buf, offset); | |
914 | found = 1; | |
915 | break; | |
916 | } | |
917 | } | |
918 | ||
919 | if (!found) | |
5e2ad10b | 920 | result = Fdefault_value (variable); |
79aa712d RS |
921 | } |
922 | else | |
f0bac7de RS |
923 | { |
924 | Lisp_Object valcontents; | |
925 | Lisp_Object current_alist_element; | |
926 | ||
927 | /* What binding is loaded right now? */ | |
5e2ad10b | 928 | valcontents = SYMBOL_VALUE (variable); |
f0bac7de RS |
929 | current_alist_element |
930 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
931 | ||
932 | /* The value of the currently loaded binding is not | |
933 | stored in it, but rather in the realvalue slot. | |
934 | Store that value into the binding it belongs to | |
935 | in case that is the one we are about to use. */ | |
936 | ||
937 | Fsetcdr (current_alist_element, | |
938 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
939 | ||
940 | /* Now get the (perhaps updated) value out of the binding. */ | |
941 | result = XCDR (result); | |
942 | } | |
79aa712d RS |
943 | |
944 | if (EQ (result, Qunbound)) | |
5e2ad10b | 945 | return Fsignal (Qvoid_variable, Fcons (variable, Qnil)); |
79aa712d RS |
946 | |
947 | return result; | |
948 | } | |
949 | ||
e1688f54 | 950 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 951 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
952 | in special slots in the buffer object. */ |
953 | ||
954 | static Lisp_Object | |
955 | buffer_lisp_local_variables (buf) | |
956 | struct buffer *buf; | |
957 | { | |
958 | Lisp_Object result = Qnil; | |
959 | register Lisp_Object tail; | |
960 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
961 | { | |
962 | Lisp_Object val, elt; | |
963 | ||
964 | elt = XCAR (tail); | |
965 | ||
966 | /* Reference each variable in the alist in buf. | |
967 | If inquiring about the current buffer, this gets the current values, | |
968 | so store them into the alist so the alist is up to date. | |
969 | If inquiring about some other buffer, this swaps out any values | |
970 | for that buffer, making the alist up to date automatically. */ | |
971 | val = find_symbol_value (XCAR (elt)); | |
972 | /* Use the current buffer value only if buf is the current buffer. */ | |
973 | if (buf != current_buffer) | |
974 | val = XCDR (elt); | |
975 | ||
976 | /* If symbol is unbound, put just the symbol in the list. */ | |
977 | if (EQ (val, Qunbound)) | |
978 | result = Fcons (XCAR (elt), result); | |
979 | /* Otherwise, put (symbol . value) in the list. */ | |
980 | else | |
981 | result = Fcons (Fcons (XCAR (elt), val), result); | |
982 | } | |
983 | ||
984 | return result; | |
985 | } | |
986 | ||
1ab256cb | 987 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 988 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 989 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
990 | Most elements look like (SYMBOL . VALUE), describing one variable. |
991 | For a symbol that is locally unbound, just the symbol appears in the value. | |
992 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
993 | No argument or nil as argument means use current buffer as BUFFER. */) |
994 | (buffer) | |
1ab256cb RM |
995 | register Lisp_Object buffer; |
996 | { | |
997 | register struct buffer *buf; | |
553defa4 | 998 | register Lisp_Object result; |
1ab256cb | 999 | |
265a9e55 | 1000 | if (NILP (buffer)) |
1ab256cb RM |
1001 | buf = current_buffer; |
1002 | else | |
1003 | { | |
b7826503 | 1004 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1005 | buf = XBUFFER (buffer); |
1006 | } | |
1007 | ||
e1688f54 | 1008 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1009 | |
1ab256cb RM |
1010 | /* Add on all the variables stored in special slots. */ |
1011 | { | |
7c02e886 | 1012 | int offset, idx; |
1ab256cb | 1013 | |
7313acd0 | 1014 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 1015 | offset < sizeof (struct buffer); |
7c02e886 GM |
1016 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1017 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1018 | { |
7313acd0 GM |
1019 | idx = PER_BUFFER_IDX (offset); |
1020 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1021 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1022 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1023 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1024 | result); |
1ab256cb RM |
1025 | } |
1026 | } | |
553defa4 RS |
1027 | |
1028 | return result; | |
1ab256cb | 1029 | } |
1ab256cb RM |
1030 | \f |
1031 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1032 | 0, 1, 0, |
7ee72033 MB |
1033 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1034 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1035 | (buffer) | |
1ab256cb RM |
1036 | register Lisp_Object buffer; |
1037 | { | |
1038 | register struct buffer *buf; | |
265a9e55 | 1039 | if (NILP (buffer)) |
1ab256cb RM |
1040 | buf = current_buffer; |
1041 | else | |
1042 | { | |
b7826503 | 1043 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1044 | buf = XBUFFER (buffer); |
1045 | } | |
1046 | ||
336cd056 | 1047 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1048 | } |
1049 | ||
1050 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1051 | 1, 1, 0, |
7ee72033 MB |
1052 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1053 | A non-nil FLAG means mark the buffer modified. */) | |
1054 | (flag) | |
1ab256cb RM |
1055 | register Lisp_Object flag; |
1056 | { | |
1057 | register int already; | |
1058 | register Lisp_Object fn; | |
8ec01c70 | 1059 | Lisp_Object buffer, window; |
1ab256cb RM |
1060 | |
1061 | #ifdef CLASH_DETECTION | |
1062 | /* If buffer becoming modified, lock the file. | |
1063 | If buffer becoming unmodified, unlock the file. */ | |
1064 | ||
60f4dd23 | 1065 | fn = current_buffer->file_truename; |
90d456d2 KH |
1066 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1067 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1068 | { |
336cd056 | 1069 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1070 | if (!already && !NILP (flag)) |
1ab256cb | 1071 | lock_file (fn); |
265a9e55 | 1072 | else if (already && NILP (flag)) |
1ab256cb RM |
1073 | unlock_file (fn); |
1074 | } | |
1075 | #endif /* CLASH_DETECTION */ | |
1076 | ||
336cd056 | 1077 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1078 | |
8ec01c70 GM |
1079 | /* Set update_mode_lines only if buffer is displayed in some window. |
1080 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1081 | state by recording/restoring the state around blocks of code. | |
1082 | Setting update_mode_lines makes redisplay consider all windows | |
1083 | (on all frames). Stealth fontification of buffers not displayed | |
1084 | would incur additional redisplay costs if we'd set | |
1085 | update_modes_lines unconditionally. | |
1086 | ||
1087 | Ideally, I think there should be another mechanism for fontifying | |
1088 | buffers without "modifying" buffers, or redisplay should be | |
1089 | smarter about updating the `*' in mode lines. --gerd */ | |
1090 | XSETBUFFER (buffer, current_buffer); | |
1091 | window = Fget_buffer_window (buffer, Qt); | |
1092 | if (WINDOWP (window)) | |
d57b83b3 GM |
1093 | { |
1094 | ++update_mode_lines; | |
1095 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1096 | } | |
177c0ea7 | 1097 | |
1ab256cb RM |
1098 | return flag; |
1099 | } | |
1100 | ||
a8c21b48 GM |
1101 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1102 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1103 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1104 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1105 | state of the current buffer. Use with care. */) |
1106 | (flag) | |
a8c21b48 GM |
1107 | Lisp_Object flag; |
1108 | { | |
1109 | #ifdef CLASH_DETECTION | |
1110 | Lisp_Object fn; | |
177c0ea7 | 1111 | |
a8c21b48 GM |
1112 | /* If buffer becoming modified, lock the file. |
1113 | If buffer becoming unmodified, unlock the file. */ | |
1114 | ||
1115 | fn = current_buffer->file_truename; | |
1116 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1117 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1118 | { | |
1119 | int already = SAVE_MODIFF < MODIFF; | |
1120 | if (!already && !NILP (flag)) | |
1121 | lock_file (fn); | |
1122 | else if (already && NILP (flag)) | |
1123 | unlock_file (fn); | |
1124 | } | |
1125 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1126 | |
a8c21b48 GM |
1127 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1128 | return flag; | |
1129 | } | |
1130 | ||
1ab256cb | 1131 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1132 | 0, 1, 0, |
7ee72033 | 1133 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
018ba359 PJ |
1134 | Each buffer has a tick counter which is incremented each time the text in |
1135 | that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1136 | No argument or nil as argument means use current buffer as BUFFER. */) |
1137 | (buffer) | |
1ab256cb RM |
1138 | register Lisp_Object buffer; |
1139 | { | |
1140 | register struct buffer *buf; | |
265a9e55 | 1141 | if (NILP (buffer)) |
1ab256cb RM |
1142 | buf = current_buffer; |
1143 | else | |
1144 | { | |
b7826503 | 1145 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1146 | buf = XBUFFER (buffer); |
1147 | } | |
1148 | ||
1149 | return make_number (BUF_MODIFF (buf)); | |
1150 | } | |
1151 | \f | |
01050cb5 | 1152 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1153 | "sRename buffer (to new name): \nP", |
7ee72033 | 1154 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1155 | If second arg UNIQUE is nil or omitted, it is an error if a |
1156 | buffer named NEWNAME already exists. | |
1157 | If UNIQUE is non-nil, come up with a new name using | |
1158 | `generate-new-buffer-name'. | |
1159 | Interactively, you can set UNIQUE with a prefix argument. | |
1160 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1161 | This does not change the name of the visited file (if any). */) |
1162 | (newname, unique) | |
489c043a | 1163 | register Lisp_Object newname, unique; |
1ab256cb RM |
1164 | { |
1165 | register Lisp_Object tem, buf; | |
1166 | ||
b7826503 | 1167 | CHECK_STRING (newname); |
d59698c4 | 1168 | |
d5db4077 | 1169 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1170 | error ("Empty string is invalid as a buffer name"); |
1171 | ||
489c043a | 1172 | tem = Fget_buffer (newname); |
265a9e55 | 1173 | if (!NILP (tem)) |
01050cb5 | 1174 | { |
8801a864 KR |
1175 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1176 | rename the buffer automatically so you can create another | |
1177 | with the original name. It makes UNIQUE equivalent to | |
1178 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1179 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1180 | return current_buffer->name; | |
3bd779aa | 1181 | if (!NILP (unique)) |
489c043a | 1182 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1183 | else |
d5db4077 | 1184 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1185 | } |
1ab256cb | 1186 | |
489c043a | 1187 | current_buffer->name = newname; |
76f590d7 JB |
1188 | |
1189 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1190 | any windows displaying current_buffer will stay unchanged. */ | |
1191 | update_mode_lines++; | |
1192 | ||
67180c6a | 1193 | XSETBUFFER (buf, current_buffer); |
489c043a | 1194 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1195 | if (NILP (current_buffer->filename) |
1196 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1197 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1198 | /* Refetch since that last call may have done GC. */ |
1199 | return current_buffer->name; | |
1ab256cb RM |
1200 | } |
1201 | ||
773fbdb9 | 1202 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1203 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1204 | Buffers not visible in windows are preferred to visible buffers, |
1205 | unless optional second argument VISIBLE-OK is non-nil. | |
1206 | If the optional third argument FRAME is non-nil, use that frame's | |
1207 | buffer list instead of the selected frame's buffer list. | |
1208 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1209 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1210 | (buffer, visible_ok, frame) | |
773fbdb9 | 1211 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1212 | { |
89132f25 | 1213 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1214 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1215 | notsogood = Qnil; |
1216 | ||
773fbdb9 | 1217 | if (NILP (frame)) |
9ba9623d | 1218 | frame = selected_frame; |
773fbdb9 | 1219 | |
7962a441 | 1220 | tail = Vbuffer_alist; |
773fbdb9 | 1221 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1222 | |
1223 | /* Consider buffers that have been seen in the selected frame | |
1224 | before other buffers. */ | |
177c0ea7 | 1225 | |
773fbdb9 | 1226 | tem = frame_buffer_list (frame); |
7962a441 RS |
1227 | add_ons = Qnil; |
1228 | while (CONSP (tem)) | |
1229 | { | |
7539e11f KR |
1230 | if (BUFFERP (XCAR (tem))) |
1231 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1232 | tem = XCDR (tem); | |
7962a441 RS |
1233 | } |
1234 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1235 | ||
6d70a280 | 1236 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1237 | { |
6d70a280 | 1238 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1239 | if (EQ (buf, buffer)) |
1240 | continue; | |
d674d13e RS |
1241 | if (NILP (buf)) |
1242 | continue; | |
1243 | if (NILP (XBUFFER (buf)->name)) | |
1244 | continue; | |
10ceceb8 | 1245 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1246 | continue; |
04ae1b48 RS |
1247 | /* If the selected frame has a buffer_predicate, |
1248 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1249 | if (!NILP (pred)) |
04ae1b48 | 1250 | { |
7962a441 | 1251 | tem = call1 (pred, buf); |
04ae1b48 RS |
1252 | if (NILP (tem)) |
1253 | continue; | |
1254 | } | |
04ae1b48 | 1255 | |
a0ebb746 | 1256 | if (NILP (visible_ok)) |
66ffe51c | 1257 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1258 | else |
1259 | tem = Qnil; | |
265a9e55 | 1260 | if (NILP (tem)) |
1ab256cb | 1261 | return buf; |
265a9e55 | 1262 | if (NILP (notsogood)) |
1ab256cb RM |
1263 | notsogood = buf; |
1264 | } | |
265a9e55 | 1265 | if (!NILP (notsogood)) |
1ab256cb | 1266 | return notsogood; |
dba1a30a GM |
1267 | buf = Fget_buffer (build_string ("*scratch*")); |
1268 | if (NILP (buf)) | |
1269 | { | |
1270 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1271 | Fset_buffer_major_mode (buf); | |
1272 | } | |
89132f25 | 1273 | return buf; |
1ab256cb RM |
1274 | } |
1275 | \f | |
1ab256cb RM |
1276 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1277 | 0, 1, "", | |
7ee72033 MB |
1278 | doc: /* Start keeping undo information for buffer BUFFER. |
1279 | No argument or nil as argument means do this for the current buffer. */) | |
1280 | (buffer) | |
ffd56f97 | 1281 | register Lisp_Object buffer; |
1ab256cb | 1282 | { |
ffd56f97 | 1283 | Lisp_Object real_buffer; |
1ab256cb | 1284 | |
ffd56f97 | 1285 | if (NILP (buffer)) |
67180c6a | 1286 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1287 | else |
1288 | { | |
ffd56f97 JB |
1289 | real_buffer = Fget_buffer (buffer); |
1290 | if (NILP (real_buffer)) | |
1291 | nsberror (buffer); | |
1ab256cb RM |
1292 | } |
1293 | ||
ffd56f97 JB |
1294 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1295 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1296 | |
1297 | return Qnil; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1302 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1303 | The buffer being killed will be current while the hook is running.\n\ | |
1304 | See `kill-buffer'." | |
1305 | */ | |
1306 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1307 | doc: /* Kill the buffer BUFFER. |
018ba359 PJ |
1308 | The argument may be a buffer or may be the name of a buffer. |
1309 | An argument of nil means kill the current buffer. | |
1310 | ||
1311 | Value is t if the buffer is actually killed, nil if user says no. | |
1312 | ||
1313 | The value of `kill-buffer-hook' (which may be local to that buffer), | |
1314 | if not void, is a list of functions to be called, with no arguments, | |
1315 | before the buffer is actually killed. The buffer to be killed is current | |
1316 | when the hook functions are called. | |
1317 | ||
1318 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1319 | with SIGHUP. */) |
1320 | (buffer) | |
a25f13ae | 1321 | Lisp_Object buffer; |
1ab256cb RM |
1322 | { |
1323 | Lisp_Object buf; | |
1324 | register struct buffer *b; | |
1325 | register Lisp_Object tem; | |
1326 | register struct Lisp_Marker *m; | |
6af718a4 | 1327 | struct gcpro gcpro1; |
1ab256cb | 1328 | |
a25f13ae | 1329 | if (NILP (buffer)) |
1ab256cb RM |
1330 | buf = Fcurrent_buffer (); |
1331 | else | |
a25f13ae | 1332 | buf = Fget_buffer (buffer); |
265a9e55 | 1333 | if (NILP (buf)) |
a25f13ae | 1334 | nsberror (buffer); |
1ab256cb RM |
1335 | |
1336 | b = XBUFFER (buf); | |
1337 | ||
4a4a9db5 KH |
1338 | /* Avoid trouble for buffer already dead. */ |
1339 | if (NILP (b->name)) | |
1340 | return Qnil; | |
1341 | ||
1ab256cb | 1342 | /* Query if the buffer is still modified. */ |
265a9e55 | 1343 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1344 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1345 | { |
a25f13ae | 1346 | GCPRO1 (buf); |
5c4930b0 RS |
1347 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1348 | b->name, make_number (0))); | |
1ab256cb | 1349 | UNGCPRO; |
265a9e55 | 1350 | if (NILP (tem)) |
1ab256cb RM |
1351 | return Qnil; |
1352 | } | |
1353 | ||
dcdffbf6 | 1354 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1355 | { |
aed13378 | 1356 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1357 | Lisp_Object arglist[1]; |
1ab256cb RM |
1358 | |
1359 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1360 | set_buffer_internal (b); | |
dcdffbf6 RS |
1361 | |
1362 | /* First run the query functions; if any query is answered no, | |
1363 | don't kill the buffer. */ | |
5b20caf0 RS |
1364 | arglist[0] = Qkill_buffer_query_functions; |
1365 | if (NILP (Frun_hook_with_args_until_failure (1, arglist))) | |
1366 | return unbind_to (count, Qnil); | |
dcdffbf6 RS |
1367 | |
1368 | /* Then run the hooks. */ | |
f1597a3a | 1369 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1370 | unbind_to (count, Qnil); |
1371 | } | |
1372 | ||
1373 | /* We have no more questions to ask. Verify that it is valid | |
1374 | to kill the buffer. This must be done after the questions | |
1375 | since anything can happen within do_yes_or_no_p. */ | |
1376 | ||
1377 | /* Don't kill the minibuffer now current. */ | |
1378 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1379 | return Qnil; | |
1380 | ||
265a9e55 | 1381 | if (NILP (b->name)) |
1ab256cb RM |
1382 | return Qnil; |
1383 | ||
336cd056 RS |
1384 | /* When we kill a base buffer, kill all its indirect buffers. |
1385 | We do it at this stage so nothing terrible happens if they | |
1386 | ask questions or their hooks get errors. */ | |
1387 | if (! b->base_buffer) | |
1388 | { | |
1389 | struct buffer *other; | |
1390 | ||
1391 | GCPRO1 (buf); | |
1392 | ||
1393 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1394 | /* all_buffers contains dead buffers too; |
1395 | don't re-kill them. */ | |
1396 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1397 | { |
1398 | Lisp_Object buf; | |
1399 | XSETBUFFER (buf, other); | |
1400 | Fkill_buffer (buf); | |
1401 | } | |
1402 | ||
1403 | UNGCPRO; | |
1404 | } | |
177c0ea7 | 1405 | |
1ab256cb RM |
1406 | /* Make this buffer not be current. |
1407 | In the process, notice if this is the sole visible buffer | |
1408 | and give up if so. */ | |
1409 | if (b == current_buffer) | |
1410 | { | |
773fbdb9 | 1411 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1412 | Fset_buffer (tem); |
1413 | if (b == current_buffer) | |
1414 | return Qnil; | |
1415 | } | |
1416 | ||
77270fac GM |
1417 | /* Notice if the buffer to kill is the sole visible buffer |
1418 | when we're currently in the mini-buffer, and give up if so. */ | |
1419 | XSETBUFFER (tem, current_buffer); | |
1420 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1421 | { | |
1422 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1423 | if (EQ (buf, tem)) |
1424 | return Qnil; | |
1425 | } | |
1426 | ||
1ab256cb RM |
1427 | /* Now there is no question: we can kill the buffer. */ |
1428 | ||
1429 | #ifdef CLASH_DETECTION | |
1430 | /* Unlock this buffer's file, if it is locked. */ | |
1431 | unlock_buffer (b); | |
1432 | #endif /* CLASH_DETECTION */ | |
1433 | ||
1ab256cb | 1434 | kill_buffer_processes (buf); |
b93fb365 | 1435 | clear_charpos_cache (b); |
1ab256cb RM |
1436 | |
1437 | tem = Vinhibit_quit; | |
1438 | Vinhibit_quit = Qt; | |
00550f94 | 1439 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1440 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1441 | frames_discard_buffer (buf); |
1ab256cb RM |
1442 | Vinhibit_quit = tem; |
1443 | ||
9cf712eb RS |
1444 | /* Delete any auto-save file, if we saved it in this session. |
1445 | But not if the buffer is modified. */ | |
a7a60ce9 | 1446 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1447 | && b->auto_save_modified != 0 |
9cf712eb | 1448 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
d674d13e RS |
1449 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1450 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1451 | { |
1452 | Lisp_Object tem; | |
1453 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1454 | if (! NILP (tem)) |
cbb6a418 | 1455 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1456 | } |
1457 | ||
4a4a9db5 KH |
1458 | if (b->base_buffer) |
1459 | { | |
1460 | /* Unchain all markers that belong to this indirect buffer. | |
1461 | Don't unchain the markers that belong to the base buffer | |
1462 | or its other indirect buffers. */ | |
65745fad | 1463 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1464 | { |
65745fad | 1465 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1466 | if (m->buffer == b) |
65745fad SM |
1467 | unchain_marker (m); |
1468 | m = next; | |
4a4a9db5 KH |
1469 | } |
1470 | } | |
1471 | else | |
1ab256cb | 1472 | { |
4a4a9db5 | 1473 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1474 | and leave them pointing nowhere. */ |
65745fad | 1475 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1476 | { |
65745fad | 1477 | struct Lisp_Marker *next = m->next; |
336cd056 | 1478 | m->buffer = 0; |
65745fad SM |
1479 | m->next = NULL; |
1480 | m = next; | |
336cd056 | 1481 | } |
65745fad | 1482 | BUF_MARKERS (b) = NULL; |
336cd056 | 1483 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1484 | |
1485 | /* Perhaps we should explicitly free the interval tree here... */ | |
1486 | } | |
33f7013e | 1487 | |
2f3f993b RS |
1488 | /* Reset the local variables, so that this buffer's local values |
1489 | won't be protected from GC. They would be protected | |
1490 | if they happened to remain encached in their symbols. | |
1491 | This gets rid of them for certain. */ | |
1492 | swap_out_buffer_local_variables (b); | |
13de9290 | 1493 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1494 | |
1ab256cb | 1495 | b->name = Qnil; |
336cd056 | 1496 | |
9ac0d9e0 | 1497 | BLOCK_INPUT; |
336cd056 | 1498 | if (! b->base_buffer) |
b86af064 | 1499 | free_buffer_text (b); |
336cd056 | 1500 | |
28e969dd JB |
1501 | if (b->newline_cache) |
1502 | { | |
1503 | free_region_cache (b->newline_cache); | |
1504 | b->newline_cache = 0; | |
1505 | } | |
1506 | if (b->width_run_cache) | |
1507 | { | |
1508 | free_region_cache (b->width_run_cache); | |
1509 | b->width_run_cache = 0; | |
1510 | } | |
1511 | b->width_table = Qnil; | |
9ac0d9e0 | 1512 | UNBLOCK_INPUT; |
1ab256cb RM |
1513 | b->undo_list = Qnil; |
1514 | ||
1515 | return Qt; | |
1516 | } | |
1517 | \f | |
36a8c287 JB |
1518 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1519 | we do this each time BUF is selected visibly, the more recently | |
1520 | selected buffers are always closer to the front of the list. This | |
1521 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1522 | |
01136e9b | 1523 | void |
1ab256cb RM |
1524 | record_buffer (buf) |
1525 | Lisp_Object buf; | |
1526 | { | |
1527 | register Lisp_Object link, prev; | |
773fbdb9 | 1528 | Lisp_Object frame; |
9ba9623d | 1529 | frame = selected_frame; |
1ab256cb RM |
1530 | |
1531 | prev = Qnil; | |
7539e11f | 1532 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1533 | { |
7539e11f | 1534 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1535 | break; |
1536 | prev = link; | |
1537 | } | |
1538 | ||
36a8c287 JB |
1539 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1540 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1541 | |
265a9e55 | 1542 | if (NILP (prev)) |
7539e11f | 1543 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1544 | else |
f3fbd155 | 1545 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1546 | |
f3fbd155 | 1547 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1548 | Vbuffer_alist = link; |
7962a441 RS |
1549 | |
1550 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1551 | ||
1552 | prev = Qnil; | |
773fbdb9 | 1553 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1554 | link = XCDR (link)) |
7962a441 | 1555 | { |
7539e11f | 1556 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1557 | break; |
1558 | prev = link; | |
1559 | } | |
1560 | ||
1561 | /* Effectively do delq. */ | |
1562 | ||
1563 | if (CONSP (link)) | |
1564 | { | |
1565 | if (NILP (prev)) | |
773fbdb9 | 1566 | set_frame_buffer_list (frame, |
7539e11f | 1567 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1568 | else |
f3fbd155 | 1569 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1570 | |
f3fbd155 | 1571 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1572 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1573 | } |
1574 | else | |
773fbdb9 | 1575 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1576 | } |
1577 | ||
a9ee7a59 | 1578 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1579 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1580 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1581 | according to `default-major-mode'. |
018ba359 | 1582 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1583 | the current buffer's major mode. */) |
1584 | (buffer) | |
a2428fa2 | 1585 | Lisp_Object buffer; |
a9ee7a59 KH |
1586 | { |
1587 | int count; | |
1588 | Lisp_Object function; | |
1589 | ||
71a0f2c6 | 1590 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1591 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1592 | function = find_symbol_value (intern ("initial-major-mode")); |
1593 | else | |
1594 | { | |
1595 | function = buffer_defaults.major_mode; | |
1596 | if (NILP (function) | |
1597 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1598 | function = current_buffer->major_mode; | |
1599 | } | |
177c0ea7 | 1600 | |
48265e61 DL |
1601 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1602 | return Qnil; | |
1603 | ||
aed13378 | 1604 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1605 | |
48265e61 DL |
1606 | /* To select a nonfundamental mode, |
1607 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1608 | |
1609 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1610 | ||
a2428fa2 | 1611 | Fset_buffer (buffer); |
48265e61 | 1612 | call0 (function); |
a9ee7a59 KH |
1613 | |
1614 | return unbind_to (count, Qnil); | |
1615 | } | |
1616 | ||
2594e0fd RS |
1617 | /* If switching buffers in WINDOW would be an error, return |
1618 | a C string saying what the error would be. */ | |
1619 | ||
1620 | char * | |
1621 | no_switch_window (window) | |
1622 | Lisp_Object window; | |
1ab256cb | 1623 | { |
1ab256cb | 1624 | Lisp_Object tem; |
2594e0fd RS |
1625 | if (EQ (minibuf_window, window)) |
1626 | return "Cannot switch buffers in minibuffer window"; | |
1627 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1628 | if (EQ (tem, Qt)) |
2594e0fd RS |
1629 | return "Cannot switch buffers in a dedicated window"; |
1630 | return NULL; | |
1631 | } | |
1632 | ||
1633 | /* Switch to buffer BUFFER in the selected window. | |
1634 | If NORECORD is non-nil, don't call record_buffer. */ | |
1635 | ||
1636 | Lisp_Object | |
1637 | switch_to_buffer_1 (buffer, norecord) | |
1638 | Lisp_Object buffer, norecord; | |
1639 | { | |
1640 | register Lisp_Object buf; | |
1ab256cb | 1641 | |
a25f13ae | 1642 | if (NILP (buffer)) |
773fbdb9 | 1643 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1644 | else |
a9ee7a59 | 1645 | { |
a25f13ae | 1646 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1647 | if (NILP (buf)) |
1648 | { | |
a25f13ae | 1649 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1650 | Fset_buffer_major_mode (buf); |
1651 | } | |
1652 | } | |
1ab256cb | 1653 | Fset_buffer (buf); |
265a9e55 | 1654 | if (NILP (norecord)) |
1ab256cb RM |
1655 | record_buffer (buf); |
1656 | ||
1657 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1658 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1659 | : selected_window, | |
2ad8731a | 1660 | buf, Qnil); |
1ab256cb | 1661 | |
cd0c235a | 1662 | return buf; |
1ab256cb RM |
1663 | } |
1664 | ||
2594e0fd | 1665 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1666 | doc: /* Select buffer BUFFER in the current window. |
a6dced2a LT |
1667 | If BUFFER does not identify an existing buffer, |
1668 | then this function creates a buffer with that name. | |
1669 | ||
1670 | When called from Lisp, BUFFER may be a buffer, a string \(a buffer name), | |
1671 | or nil. If BUFFER is nil, then this function chooses a buffer | |
1672 | using `other-buffer'. | |
018ba359 PJ |
1673 | Optional second arg NORECORD non-nil means |
1674 | do not put this buffer at the front of the list of recently selected ones. | |
a6dced2a | 1675 | This function returns the buffer it switched to. |
018ba359 PJ |
1676 | |
1677 | WARNING: This is NOT the way to work on another buffer temporarily | |
1678 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1679 | the window-buffer correspondences. */) |
1680 | (buffer, norecord) | |
2594e0fd RS |
1681 | Lisp_Object buffer, norecord; |
1682 | { | |
1683 | char *err; | |
1684 | ||
27c6b98e SM |
1685 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
1686 | /* Basically a NOP. Avoid signalling an error if the selected window | |
1687 | is dedicated, or a minibuffer, ... */ | |
1688 | return Fset_buffer (buffer); | |
1689 | ||
2594e0fd RS |
1690 | err = no_switch_window (selected_window); |
1691 | if (err) error (err); | |
1692 | ||
1693 | return switch_to_buffer_1 (buffer, norecord); | |
1694 | } | |
1695 | ||
cd0c235a | 1696 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1697 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
a6dced2a LT |
1698 | BUFFER may be a buffer, a string \(a buffer name), or nil. |
1699 | If BUFFER is a string which is not the name of an existing buffer, | |
1700 | then this function creates a buffer with that name. | |
1701 | If BUFFER is nil, then it chooses some other buffer. | |
018ba359 | 1702 | If `pop-up-windows' is non-nil, windows can be split to do this. |
e198ba87 | 1703 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another |
ae47339f RS |
1704 | window even if BUFFER is already visible in the selected window, |
1705 | and ignore `same-window-regexps' and `same-window-buffer-names'. | |
a6dced2a | 1706 | This function returns the buffer it switched to. |
018ba359 PJ |
1707 | This uses the function `display-buffer' as a subroutine; see the documentation |
1708 | of `display-buffer' for additional customization information. | |
1709 | ||
1710 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1711 | do not put this buffer at the front of the list of recently selected ones. */) |
1712 | (buffer, other_window, norecord) | |
6d12711f | 1713 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1714 | { |
1715 | register Lisp_Object buf; | |
a25f13ae | 1716 | if (NILP (buffer)) |
773fbdb9 | 1717 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1718 | else |
7c2087ee | 1719 | { |
a25f13ae | 1720 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1721 | if (NILP (buf)) |
1722 | { | |
a25f13ae | 1723 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1724 | Fset_buffer_major_mode (buf); |
1725 | } | |
1726 | } | |
1ab256cb | 1727 | Fset_buffer (buf); |
6d12711f | 1728 | if (NILP (norecord)) |
f1321dc3 | 1729 | /* Why bother ? Fselect_window will do it for us anyway. -stef */ |
6d12711f | 1730 | record_buffer (buf); |
f1321dc3 | 1731 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord); |
e8b3a22d | 1732 | return buf; |
1ab256cb RM |
1733 | } |
1734 | ||
1735 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1736 | doc: /* Return the current buffer as a Lisp object. */) |
1737 | () | |
1ab256cb RM |
1738 | { |
1739 | register Lisp_Object buf; | |
67180c6a | 1740 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1741 | return buf; |
1742 | } | |
1743 | \f | |
7ec44ec6 GM |
1744 | /* Set the current buffer to B. |
1745 | ||
1746 | We previously set windows_or_buffers_changed here to invalidate | |
1747 | global unchanged information in beg_unchanged and end_unchanged. | |
1748 | This is no longer necessary because we now compute unchanged | |
1749 | information on a buffer-basis. Every action affecting other | |
1750 | windows than the selected one requires a select_window at some | |
1751 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1752 | |
1753 | void | |
1754 | set_buffer_internal (b) | |
1755 | register struct buffer *b; | |
1756 | { | |
b5a225b4 | 1757 | if (current_buffer != b) |
7ec44ec6 | 1758 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1759 | } |
1760 | ||
1761 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1762 | This is used by redisplay. */ | |
1763 | ||
1764 | void | |
1765 | set_buffer_internal_1 (b) | |
1766 | register struct buffer *b; | |
1767 | { | |
1768 | register struct buffer *old_buf; | |
1769 | register Lisp_Object tail, valcontents; | |
1770 | Lisp_Object tem; | |
1771 | ||
b86af064 | 1772 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1773 | if (b->text->beg == NULL) |
b86af064 GM |
1774 | enlarge_buffer_text (b, 0); |
1775 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1776 | |
c7aa5005 KH |
1777 | if (current_buffer == b) |
1778 | return; | |
1779 | ||
1ab256cb RM |
1780 | old_buf = current_buffer; |
1781 | current_buffer = b; | |
1782 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1783 | ||
336cd056 RS |
1784 | if (old_buf) |
1785 | { | |
1786 | /* Put the undo list back in the base buffer, so that it appears | |
1787 | that an indirect buffer shares the undo list of its base. */ | |
1788 | if (old_buf->base_buffer) | |
1789 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1790 | ||
1791 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1792 | when it is not current, update them now. */ | |
1793 | if (! NILP (old_buf->pt_marker)) | |
1794 | { | |
1795 | Lisp_Object obuf; | |
1796 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1797 | set_marker_both (old_buf->pt_marker, obuf, |
1798 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1799 | } |
1800 | if (! NILP (old_buf->begv_marker)) | |
1801 | { | |
1802 | Lisp_Object obuf; | |
1803 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1804 | set_marker_both (old_buf->begv_marker, obuf, |
1805 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1806 | } |
1807 | if (! NILP (old_buf->zv_marker)) | |
1808 | { | |
1809 | Lisp_Object obuf; | |
1810 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1811 | set_marker_both (old_buf->zv_marker, obuf, |
1812 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1813 | } |
1814 | } | |
1815 | ||
1816 | /* Get the undo list from the base buffer, so that it appears | |
1817 | that an indirect buffer shares the undo list of its base. */ | |
1818 | if (b->base_buffer) | |
1819 | b->undo_list = b->base_buffer->undo_list; | |
1820 | ||
1821 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1822 | when it is not current, fetch them now. */ | |
1823 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1824 | { |
1825 | BUF_PT (b) = marker_position (b->pt_marker); | |
1826 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1827 | } | |
336cd056 | 1828 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1829 | { |
1830 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1831 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1832 | } | |
336cd056 | 1833 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1834 | { |
1835 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1836 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1837 | } | |
336cd056 | 1838 | |
1ab256cb RM |
1839 | /* Look down buffer's list of local Lisp variables |
1840 | to find and update any that forward into C variables. */ | |
1841 | ||
65745fad | 1842 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1843 | { |
f5c1dd0d | 1844 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1845 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1846 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1847 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1848 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1849 | /* Just reference the variable |
1850 | to cause it to become set for this buffer. */ | |
7539e11f | 1851 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1852 | } |
1853 | ||
1854 | /* Do the same with any others that were local to the previous buffer */ | |
1855 | ||
1856 | if (old_buf) | |
65745fad | 1857 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1858 | { |
f5c1dd0d | 1859 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1860 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1861 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1862 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1863 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1864 | /* Just reference the variable |
1865 | to cause it to become set for this buffer. */ | |
7539e11f | 1866 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1867 | } |
1868 | } | |
1869 | ||
336cd056 | 1870 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1871 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1872 | |
1873 | void | |
1874 | set_buffer_temp (b) | |
1875 | struct buffer *b; | |
1876 | { | |
1877 | register struct buffer *old_buf; | |
1878 | ||
1879 | if (current_buffer == b) | |
1880 | return; | |
1881 | ||
1882 | old_buf = current_buffer; | |
1883 | current_buffer = b; | |
1884 | ||
1885 | if (old_buf) | |
1886 | { | |
1887 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1888 | when it is not current, update them now. */ | |
1889 | if (! NILP (old_buf->pt_marker)) | |
1890 | { | |
1891 | Lisp_Object obuf; | |
1892 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1893 | set_marker_both (old_buf->pt_marker, obuf, |
1894 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1895 | } |
1896 | if (! NILP (old_buf->begv_marker)) | |
1897 | { | |
1898 | Lisp_Object obuf; | |
1899 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1900 | set_marker_both (old_buf->begv_marker, obuf, |
1901 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1902 | } |
1903 | if (! NILP (old_buf->zv_marker)) | |
1904 | { | |
1905 | Lisp_Object obuf; | |
1906 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1907 | set_marker_both (old_buf->zv_marker, obuf, |
1908 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1909 | } |
1910 | } | |
1911 | ||
1912 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1913 | when it is not current, fetch them now. */ | |
1914 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1915 | { |
1916 | BUF_PT (b) = marker_position (b->pt_marker); | |
1917 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1918 | } | |
336cd056 | 1919 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1920 | { |
1921 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1922 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1923 | } | |
336cd056 | 1924 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1925 | { |
1926 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1927 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1928 | } | |
336cd056 RS |
1929 | } |
1930 | ||
1ab256cb | 1931 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1932 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1933 | BUFFER may be a buffer or the name of an existing buffer. |
1934 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1935 | This function does not display the buffer, so its effect ends | |
1936 | when the current command terminates. | |
7ee72033 MB |
1937 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1938 | (buffer) | |
a25f13ae | 1939 | register Lisp_Object buffer; |
1ab256cb | 1940 | { |
a25f13ae KH |
1941 | register Lisp_Object buf; |
1942 | buf = Fget_buffer (buffer); | |
1943 | if (NILP (buf)) | |
1944 | nsberror (buffer); | |
1945 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1946 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1947 | set_buffer_internal (XBUFFER (buf)); |
1948 | return buf; | |
1ab256cb | 1949 | } |
d0628b06 RS |
1950 | |
1951 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1952 | ||
1953 | Lisp_Object | |
1954 | set_buffer_if_live (buffer) | |
1955 | Lisp_Object buffer; | |
1956 | { | |
1957 | if (! NILP (XBUFFER (buffer)->name)) | |
1958 | Fset_buffer (buffer); | |
1959 | return Qnil; | |
1960 | } | |
1ab256cb RM |
1961 | \f |
1962 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1963 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
1964 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
1965 | () | |
1ab256cb | 1966 | { |
a96b68f1 RS |
1967 | if (!NILP (current_buffer->read_only) |
1968 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1969 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1970 | return Qnil; | |
1971 | } | |
1972 | ||
1973 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 1974 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
1975 | There it is the least likely candidate for `other-buffer' to return; |
1976 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
39971188 | 1977 | You can specify a buffer name as BUFFER, or an actual buffer object. |
018ba359 PJ |
1978 | If BUFFER is nil or omitted, bury the current buffer. |
1979 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
1980 | selected window if it is displayed there. */) |
1981 | (buffer) | |
a2428fa2 | 1982 | register Lisp_Object buffer; |
1ab256cb | 1983 | { |
b271272a | 1984 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1985 | if (NILP (buffer)) |
a5611885 | 1986 | { |
c58dab63 | 1987 | Lisp_Object tem; |
a2428fa2 | 1988 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1989 | |
c58dab63 | 1990 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1991 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1992 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1993 | { |
1994 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1995 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1996 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1997 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1998 | else | |
1999 | Fdelete_window (selected_window); | |
2000 | } | |
a5611885 | 2001 | } |
1ab256cb RM |
2002 | else |
2003 | { | |
2004 | Lisp_Object buf1; | |
177c0ea7 | 2005 | |
a2428fa2 | 2006 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2007 | if (NILP (buf1)) |
a2428fa2 EN |
2008 | nsberror (buffer); |
2009 | buffer = buf1; | |
b271272a JB |
2010 | } |
2011 | ||
a1a8b28e GM |
2012 | /* Move buffer to the end of the buffer list. Do nothing if the |
2013 | buffer is killed. */ | |
2014 | if (!NILP (XBUFFER (buffer)->name)) | |
2015 | { | |
2016 | Lisp_Object aelt, link; | |
b271272a | 2017 | |
a1a8b28e GM |
2018 | aelt = Frassq (buffer, Vbuffer_alist); |
2019 | link = Fmemq (aelt, Vbuffer_alist); | |
2020 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2021 | XSETCDR (link, Qnil); |
a1a8b28e | 2022 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2023 | |
6c488ddb RS |
2024 | /* Removing BUFFER from frame-specific lists |
2025 | has the effect of putting BUFFER at the end | |
2026 | of the combined list in each frame. */ | |
2027 | frames_discard_buffer (buffer); | |
a1a8b28e | 2028 | } |
dec989eb | 2029 | |
1ab256cb RM |
2030 | return Qnil; |
2031 | } | |
2032 | \f | |
c922bc55 | 2033 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2034 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2035 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2036 | so the buffer is truly empty after this. */) |
2037 | () | |
1ab256cb RM |
2038 | { |
2039 | Fwiden (); | |
c0d9a0c3 GM |
2040 | |
2041 | del_range (BEG, Z); | |
c280bc6a | 2042 | |
1ab256cb RM |
2043 | current_buffer->last_window_start = 1; |
2044 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2045 | if future size is less than past size. Use of erase-buffer | |
2046 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2047 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2048 | return Qnil; |
2049 | } | |
2050 | ||
01136e9b | 2051 | void |
1ab256cb RM |
2052 | validate_region (b, e) |
2053 | register Lisp_Object *b, *e; | |
2054 | { | |
b7826503 PJ |
2055 | CHECK_NUMBER_COERCE_MARKER (*b); |
2056 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2057 | |
2058 | if (XINT (*b) > XINT (*e)) | |
2059 | { | |
03192067 KH |
2060 | Lisp_Object tem; |
2061 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2062 | } |
2063 | ||
2064 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2065 | && XINT (*e) <= ZV)) | |
2066 | args_out_of_range (*b, *e); | |
2067 | } | |
2068 | \f | |
b05525fa RS |
2069 | /* Advance BYTE_POS up to a character boundary |
2070 | and return the adjusted position. */ | |
2071 | ||
2072 | static int | |
2073 | advance_to_char_boundary (byte_pos) | |
2074 | int byte_pos; | |
2075 | { | |
f8449323 | 2076 | int c; |
b05525fa | 2077 | |
f8449323 RS |
2078 | if (byte_pos == BEG) |
2079 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2080 | return BEG; |
f8449323 RS |
2081 | |
2082 | c = FETCH_BYTE (byte_pos); | |
2083 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2084 | { |
1be6387d | 2085 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2086 | multibyte sequence. */ |
a9bcded1 KH |
2087 | int orig_byte_pos = byte_pos; |
2088 | ||
2089 | do | |
2090 | { | |
2091 | byte_pos--; | |
2092 | c = FETCH_BYTE (byte_pos); | |
2093 | } | |
2094 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2095 | INC_POS (byte_pos); |
a9bcded1 KH |
2096 | if (byte_pos < orig_byte_pos) |
2097 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2098 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2099 | surely advance to the correct character boundary. If C is | |
2100 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2101 | } |
2102 | ||
20773569 | 2103 | return byte_pos; |
b05525fa RS |
2104 | } |
2105 | ||
3ac81adb RS |
2106 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2107 | 1, 1, 0, | |
7ee72033 | 2108 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2109 | If FLAG is t, this makes the buffer a multibyte buffer. |
2110 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
2111 | The buffer contents remain unchanged as a sequence of bytes | |
fc1d15f6 KH |
2112 | but the contents viewed as characters do change. |
2113 | If the multibyte flag was really changed, undo information of the | |
2114 | current buffer is cleared. */) | |
7ee72033 | 2115 | (flag) |
3ac81adb RS |
2116 | Lisp_Object flag; |
2117 | { | |
65745fad | 2118 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2119 | struct buffer *other; |
a9bcded1 | 2120 | int undo_enabled_p = !EQ (current_buffer->undo_list, Qt); |
458c8af4 | 2121 | int begv, zv; |
8d1203ea | 2122 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2123 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
3ac81adb | 2124 | |
6e553d5e RS |
2125 | if (current_buffer->base_buffer) |
2126 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2127 | ||
70e77119 AS |
2128 | /* Do nothing if nothing actually changes. */ |
2129 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2130 | return flag; | |
2131 | ||
b05525fa RS |
2132 | /* It would be better to update the list, |
2133 | but this is good enough for now. */ | |
a9bcded1 KH |
2134 | if (undo_enabled_p) |
2135 | current_buffer->undo_list = Qt; | |
b05525fa | 2136 | |
3ac81adb RS |
2137 | /* If the cached position is for this buffer, clear it out. */ |
2138 | clear_charpos_cache (current_buffer); | |
2139 | ||
458c8af4 KH |
2140 | if (NILP (flag)) |
2141 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2142 | else | |
2143 | begv = BEGV, zv = ZV; | |
2144 | ||
a9bcded1 KH |
2145 | if (narrowed) |
2146 | Fwiden (); | |
2147 | ||
3ac81adb RS |
2148 | if (NILP (flag)) |
2149 | { | |
a9bcded1 KH |
2150 | int pos, stop; |
2151 | unsigned char *p; | |
2152 | ||
3ac81adb RS |
2153 | /* Do this first, so it can use CHAR_TO_BYTE |
2154 | to calculate the old correspondences. */ | |
2155 | set_intervals_multibyte (0); | |
2156 | ||
2157 | current_buffer->enable_multibyte_characters = Qnil; | |
2158 | ||
2159 | Z = Z_BYTE; | |
2160 | BEGV = BEGV_BYTE; | |
2161 | ZV = ZV_BYTE; | |
2162 | GPT = GPT_BYTE; | |
2163 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2164 | ||
60ebfdf3 | 2165 | |
65745fad SM |
2166 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2167 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2168 | |
2169 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2170 | pos = BEG; | |
2171 | stop = GPT; | |
2172 | p = BEG_ADDR; | |
2173 | while (1) | |
2174 | { | |
2175 | int c, bytes; | |
2176 | ||
2177 | if (pos == stop) | |
2178 | { | |
2179 | if (pos == Z) | |
2180 | break; | |
2181 | p = GAP_END_ADDR; | |
2182 | stop = Z; | |
2183 | } | |
2184 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2185 | p += bytes, pos += bytes; | |
2186 | else | |
2187 | { | |
2188 | c = STRING_CHAR (p, stop - pos); | |
2189 | /* Delete all bytes for this 8-bit character but the | |
2190 | last one, and change the last one to the charcter | |
2191 | code. */ | |
2192 | bytes--; | |
2193 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2194 | p = GAP_END_ADDR; | |
2195 | *p++ = c; | |
2196 | pos++; | |
2197 | if (begv > pos) | |
2198 | begv -= bytes; | |
2199 | if (zv > pos) | |
2200 | zv -= bytes; | |
2201 | stop = Z; | |
2202 | } | |
2203 | } | |
2204 | if (narrowed) | |
2205 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2206 | } |
2207 | else | |
2208 | { | |
a9bcded1 KH |
2209 | int pt = PT; |
2210 | int pos, stop; | |
2211 | unsigned char *p; | |
2212 | ||
673c57d2 | 2213 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2214 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2215 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2216 | |
2217 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2218 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2219 | { | |
2220 | unsigned char *p = GPT_ADDR - 1; | |
2221 | ||
2222 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2223 | if (BASE_LEADING_CODE_P (*p)) | |
2224 | { | |
2225 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2226 | ||
2227 | move_gap_both (new_gpt, new_gpt); | |
2228 | } | |
2229 | } | |
2230 | ||
a9bcded1 KH |
2231 | /* Make the buffer contents valid as multibyte by converting |
2232 | 8-bit characters to multibyte form. */ | |
2233 | pos = BEG; | |
2234 | stop = GPT; | |
2235 | p = BEG_ADDR; | |
2236 | while (1) | |
2237 | { | |
2238 | int bytes; | |
2239 | ||
2240 | if (pos == stop) | |
2241 | { | |
2242 | if (pos == Z) | |
2243 | break; | |
2244 | p = GAP_END_ADDR; | |
2245 | stop = Z; | |
2246 | } | |
177c0ea7 | 2247 | |
a9bcded1 KH |
2248 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) |
2249 | p += bytes, pos += bytes; | |
2250 | else | |
2251 | { | |
2252 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2253 | ||
2254 | bytes = CHAR_STRING (*p, tmp); | |
2255 | *p = tmp[0]; | |
2256 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2257 | bytes--; | |
2258 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2259 | /* Now the gap is after the just inserted data. */ | |
2260 | pos = GPT; | |
2261 | p = GAP_END_ADDR; | |
2262 | if (pos <= begv) | |
2263 | begv += bytes; | |
2264 | if (pos <= zv) | |
2265 | zv += bytes; | |
2266 | if (pos <= pt) | |
2267 | pt += bytes; | |
2268 | stop = Z; | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | if (pt != PT) | |
2273 | TEMP_SET_PT (pt); | |
2274 | ||
2275 | if (narrowed) | |
2276 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2277 | ||
3ac81adb RS |
2278 | /* Do this first, so that chars_in_text asks the right question. |
2279 | set_intervals_multibyte needs it too. */ | |
2280 | current_buffer->enable_multibyte_characters = Qt; | |
2281 | ||
b05525fa | 2282 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2283 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2284 | |
673c57d2 | 2285 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2286 | |
2287 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2288 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2289 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2290 | else |
2291 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2292 | |
2293 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2294 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2295 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2296 | else |
2297 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2298 | |
2299 | { | |
2300 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2301 | int pt; | |
2302 | ||
2303 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2304 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2305 | else |
2306 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2307 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2308 | } | |
3ac81adb RS |
2309 | |
2310 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2311 | |
2312 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2313 | getting confused by the markers that have not yet been updated. | |
2314 | It is also a signal that it should never create a marker. */ | |
65745fad | 2315 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2316 | |
65745fad | 2317 | for (; tail; tail = tail->next) |
3ac81adb | 2318 | { |
65745fad SM |
2319 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2320 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2321 | } |
b69f9797 RS |
2322 | |
2323 | /* Make sure no markers were put on the chain | |
2324 | while the chain value was incorrect. */ | |
65745fad | 2325 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2326 | abort (); |
2327 | ||
3ac81adb RS |
2328 | BUF_MARKERS (current_buffer) = markers; |
2329 | ||
2330 | /* Do this last, so it can calculate the new correspondences | |
2331 | between chars and bytes. */ | |
2332 | set_intervals_multibyte (1); | |
2333 | } | |
2334 | ||
a9bcded1 KH |
2335 | if (undo_enabled_p) |
2336 | current_buffer->undo_list = Qnil; | |
2337 | ||
724b203f GM |
2338 | /* Changing the multibyteness of a buffer means that all windows |
2339 | showing that buffer must be updated thoroughly. */ | |
2340 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2341 | ++windows_or_buffers_changed; | |
2342 | ||
abc9d959 RS |
2343 | /* Copy this buffer's new multibyte status |
2344 | into all of its indirect buffers. */ | |
2345 | for (other = all_buffers; other; other = other->next) | |
2346 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2347 | { |
2348 | other->enable_multibyte_characters | |
2349 | = current_buffer->enable_multibyte_characters; | |
2350 | other->prevent_redisplay_optimizations_p = 1; | |
2351 | } | |
abc9d959 | 2352 | |
ed00559d KH |
2353 | /* Restore the modifiedness of the buffer. */ |
2354 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2355 | Fset_buffer_modified_p (Qnil); | |
2356 | ||
2a2b50a9 | 2357 | #ifdef subprocesses |
172f9454 KH |
2358 | /* Update coding systems of this buffer's process (if any). */ |
2359 | { | |
2360 | Lisp_Object process; | |
2361 | ||
2362 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2363 | if (PROCESSP (process)) | |
2364 | setup_process_coding_systems (process); | |
2365 | } | |
2a2b50a9 | 2366 | #endif /* subprocesses */ |
172f9454 | 2367 | |
3ac81adb RS |
2368 | return flag; |
2369 | } | |
2370 | \f | |
1ab256cb | 2371 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2372 | 0, 0, 0, |
7ee72033 | 2373 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2374 | Most local variable bindings are eliminated so that the default values |
2375 | become effective once more. Also, the syntax table is set from | |
2376 | `standard-syntax-table', the local keymap is set to nil, | |
2377 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2378 | This function also forces redisplay of the mode line. | |
2379 | ||
2380 | Every function to select a new major mode starts by | |
2381 | calling this function. | |
2382 | ||
2383 | As a special exception, local variables whose names have | |
2384 | a non-nil `permanent-local' property are not eliminated by this function. | |
2385 | ||
2386 | The first thing this function does is run | |
7ee72033 MB |
2387 | the normal hook `change-major-mode-hook'. */) |
2388 | () | |
1ab256cb RM |
2389 | { |
2390 | register Lisp_Object alist, sym, tem; | |
2391 | Lisp_Object oalist; | |
7410477a | 2392 | |
fd186f07 RS |
2393 | if (!NILP (Vrun_hooks)) |
2394 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
2395 | oalist = current_buffer->local_var_alist; |
2396 | ||
2f3f993b RS |
2397 | /* Make sure none of the bindings in oalist |
2398 | remain swapped in, in their symbols. */ | |
1ab256cb | 2399 | |
2f3f993b | 2400 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2401 | |
2402 | /* Actually eliminate all local bindings of this buffer. */ | |
2403 | ||
13de9290 | 2404 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2405 | |
1ab256cb RM |
2406 | /* Any which are supposed to be permanent, |
2407 | make local again, with the same values they had. */ | |
177c0ea7 | 2408 | |
7539e11f | 2409 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2410 | { |
7539e11f | 2411 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2412 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2413 | if (! NILP (tem)) |
01050cb5 RM |
2414 | { |
2415 | Fmake_local_variable (sym); | |
7539e11f | 2416 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2417 | } |
1ab256cb RM |
2418 | } |
2419 | ||
2420 | /* Force mode-line redisplay. Useful here because all major mode | |
2421 | commands call this function. */ | |
2422 | update_mode_lines++; | |
2423 | ||
2424 | return Qnil; | |
2425 | } | |
2f3f993b RS |
2426 | |
2427 | /* Make sure no local variables remain set up with buffer B | |
2428 | for their current values. */ | |
2429 | ||
2430 | static void | |
2431 | swap_out_buffer_local_variables (b) | |
2432 | struct buffer *b; | |
2433 | { | |
2434 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2435 | ||
2436 | XSETBUFFER (buffer, b); | |
2437 | oalist = b->local_var_alist; | |
2438 | ||
7539e11f | 2439 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2440 | { |
7539e11f | 2441 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2442 | |
2443 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2444 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2445 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2446 | { |
2447 | /* Symbol is set up for this buffer's old local value. | |
2448 | Set it up for the current buffer with the default value. */ | |
2449 | ||
f5c1dd0d | 2450 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2451 | /* Store the symbol's current value into the alist entry |
2452 | it is currently set up for. This is so that, if the | |
2453 | local is marked permanent, and we make it local again | |
2454 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2455 | XSETCDR (XCAR (tem), |
2456 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2457 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2458 | XSETCAR (tem, tem); |
2f3f993b | 2459 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2460 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2461 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2462 | store_symval_forwarding (sym, |
f5c1dd0d | 2463 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2464 | XCDR (tem), NULL); |
2f3f993b RS |
2465 | } |
2466 | } | |
2467 | } | |
1ab256cb | 2468 | \f |
2eec3b4e | 2469 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2470 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2471 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 JB |
2472 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2473 | or ZV if there are no more overlays. | |
bbbe9545 | 2474 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2475 | or where an overlay starts which ends at or after POS; |
2476 | or BEGV if there are no such overlays. | |
239c932b | 2477 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2478 | |
2479 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2480 | when this function is called. |
2481 | ||
2482 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2483 | If EXTEND is zero, we never extend the vector, | |
2484 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2485 | But we still return the total number of overlays. |
2486 | ||
2487 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2488 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2489 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2490 | |
2491 | int | |
ac869cf7 | 2492 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2493 | EMACS_INT pos; |
61d54cd5 | 2494 | int extend; |
2eec3b4e RS |
2495 | Lisp_Object **vec_ptr; |
2496 | int *len_ptr; | |
2497 | int *next_ptr; | |
239c932b | 2498 | int *prev_ptr; |
ac869cf7 | 2499 | int change_req; |
1ab256cb | 2500 | { |
2410d73a SM |
2501 | Lisp_Object overlay, start, end; |
2502 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2503 | int idx = 0; |
2504 | int len = *len_ptr; | |
2505 | Lisp_Object *vec = *vec_ptr; | |
2506 | int next = ZV; | |
239c932b | 2507 | int prev = BEGV; |
61d54cd5 RS |
2508 | int inhibit_storing = 0; |
2509 | ||
2410d73a | 2510 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2511 | { |
239c932b | 2512 | int startpos, endpos; |
52f8ec73 | 2513 | |
2410d73a | 2514 | XSETMISC (overlay, tail); |
1ab256cb | 2515 | |
2eec3b4e RS |
2516 | start = OVERLAY_START (overlay); |
2517 | end = OVERLAY_END (overlay); | |
239c932b RS |
2518 | endpos = OVERLAY_POSITION (end); |
2519 | if (endpos < pos) | |
2520 | { | |
2521 | if (prev < endpos) | |
2522 | prev = endpos; | |
2523 | break; | |
2524 | } | |
413e06a4 RS |
2525 | startpos = OVERLAY_POSITION (start); |
2526 | /* This one ends at or after POS | |
daa1c109 | 2527 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2528 | if (prev < startpos && startpos < pos) |
2529 | prev = startpos; | |
239c932b RS |
2530 | if (endpos == pos) |
2531 | continue; | |
2eec3b4e RS |
2532 | if (startpos <= pos) |
2533 | { | |
2534 | if (idx == len) | |
2535 | { | |
61d54cd5 RS |
2536 | /* The supplied vector is full. |
2537 | Either make it bigger, or don't store any more in it. */ | |
2538 | if (extend) | |
2539 | { | |
0552666b GM |
2540 | /* Make it work with an initial len == 0. */ |
2541 | len *= 2; | |
2542 | if (len == 0) | |
2543 | len = 4; | |
2544 | *len_ptr = len; | |
61d54cd5 RS |
2545 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2546 | *vec_ptr = vec; | |
2547 | } | |
2548 | else | |
2549 | inhibit_storing = 1; | |
2eec3b4e | 2550 | } |
61d54cd5 RS |
2551 | |
2552 | if (!inhibit_storing) | |
2553 | vec[idx] = overlay; | |
2554 | /* Keep counting overlays even if we can't return them all. */ | |
2555 | idx++; | |
2eec3b4e RS |
2556 | } |
2557 | else if (startpos < next) | |
2558 | next = startpos; | |
2559 | } | |
2560 | ||
2410d73a | 2561 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2562 | { |
239c932b | 2563 | int startpos, endpos; |
52f8ec73 | 2564 | |
2410d73a | 2565 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2566 | |
2567 | start = OVERLAY_START (overlay); | |
2568 | end = OVERLAY_END (overlay); | |
2569 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2570 | if (pos < startpos) |
2eec3b4e RS |
2571 | { |
2572 | if (startpos < next) | |
2573 | next = startpos; | |
2574 | break; | |
2575 | } | |
239c932b RS |
2576 | endpos = OVERLAY_POSITION (end); |
2577 | if (pos < endpos) | |
2eec3b4e RS |
2578 | { |
2579 | if (idx == len) | |
2580 | { | |
61d54cd5 RS |
2581 | if (extend) |
2582 | { | |
4b0e44fc RS |
2583 | /* Make it work with an initial len == 0. */ |
2584 | len *= 2; | |
0552666b | 2585 | if (len == 0) |
4b0e44fc RS |
2586 | len = 4; |
2587 | *len_ptr = len; | |
61d54cd5 RS |
2588 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2589 | *vec_ptr = vec; | |
2590 | } | |
2591 | else | |
2592 | inhibit_storing = 1; | |
2eec3b4e | 2593 | } |
61d54cd5 RS |
2594 | |
2595 | if (!inhibit_storing) | |
2596 | vec[idx] = overlay; | |
2597 | idx++; | |
413e06a4 RS |
2598 | |
2599 | if (startpos < pos && startpos > prev) | |
2600 | prev = startpos; | |
2eec3b4e | 2601 | } |
239c932b RS |
2602 | else if (endpos < pos && endpos > prev) |
2603 | prev = endpos; | |
1d5f4c1d MB |
2604 | else if (endpos == pos && startpos > prev |
2605 | && (!change_req || startpos < pos)) | |
413e06a4 | 2606 | prev = startpos; |
1ab256cb RM |
2607 | } |
2608 | ||
239c932b RS |
2609 | if (next_ptr) |
2610 | *next_ptr = next; | |
2611 | if (prev_ptr) | |
2612 | *prev_ptr = prev; | |
2eec3b4e RS |
2613 | return idx; |
2614 | } | |
74514898 RS |
2615 | \f |
2616 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2617 | or are empty at BEG. |
2618 | ||
177c0ea7 | 2619 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2620 | Store in *LEN_PTR the size allocated for the vector. |
2621 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2622 | or ZV if there are no more overlays. | |
2623 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2624 | or BEGV if there are no previous overlays. | |
2625 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2626 | ||
2627 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2628 | when this function is called. | |
2629 | ||
2630 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2631 | If EXTEND is zero, we never extend the vector, | |
2632 | and we store only as many overlays as will fit. | |
2633 | But we still return the total number of overlays. */ | |
2634 | ||
a9b9a780 | 2635 | static int |
74514898 RS |
2636 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2637 | int beg, end; | |
2638 | int extend; | |
2639 | Lisp_Object **vec_ptr; | |
2640 | int *len_ptr; | |
2641 | int *next_ptr; | |
2642 | int *prev_ptr; | |
2643 | { | |
2410d73a SM |
2644 | Lisp_Object overlay, ostart, oend; |
2645 | struct Lisp_Overlay *tail; | |
74514898 RS |
2646 | int idx = 0; |
2647 | int len = *len_ptr; | |
2648 | Lisp_Object *vec = *vec_ptr; | |
2649 | int next = ZV; | |
2650 | int prev = BEGV; | |
2651 | int inhibit_storing = 0; | |
2652 | ||
2410d73a | 2653 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2654 | { |
2655 | int startpos, endpos; | |
2656 | ||
2410d73a | 2657 | XSETMISC (overlay, tail); |
74514898 RS |
2658 | |
2659 | ostart = OVERLAY_START (overlay); | |
2660 | oend = OVERLAY_END (overlay); | |
2661 | endpos = OVERLAY_POSITION (oend); | |
2662 | if (endpos < beg) | |
2663 | { | |
2664 | if (prev < endpos) | |
2665 | prev = endpos; | |
2666 | break; | |
2667 | } | |
2668 | startpos = OVERLAY_POSITION (ostart); | |
2669 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2670 | or is empty at the start of the range. */ |
74514898 | 2671 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2672 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2673 | { |
2674 | if (idx == len) | |
2675 | { | |
2676 | /* The supplied vector is full. | |
2677 | Either make it bigger, or don't store any more in it. */ | |
2678 | if (extend) | |
2679 | { | |
4b0e44fc RS |
2680 | /* Make it work with an initial len == 0. */ |
2681 | len *= 2; | |
2682 | if (len == 0) | |
2683 | len = 4; | |
2684 | *len_ptr = len; | |
74514898 RS |
2685 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2686 | *vec_ptr = vec; | |
2687 | } | |
2688 | else | |
2689 | inhibit_storing = 1; | |
2690 | } | |
2691 | ||
2692 | if (!inhibit_storing) | |
2693 | vec[idx] = overlay; | |
2694 | /* Keep counting overlays even if we can't return them all. */ | |
2695 | idx++; | |
2696 | } | |
2697 | else if (startpos < next) | |
2698 | next = startpos; | |
2699 | } | |
2700 | ||
2410d73a | 2701 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2702 | { |
2703 | int startpos, endpos; | |
2704 | ||
2410d73a | 2705 | XSETMISC (overlay, tail); |
74514898 RS |
2706 | |
2707 | ostart = OVERLAY_START (overlay); | |
2708 | oend = OVERLAY_END (overlay); | |
2709 | startpos = OVERLAY_POSITION (ostart); | |
2710 | if (end < startpos) | |
2711 | { | |
2712 | if (startpos < next) | |
2713 | next = startpos; | |
2714 | break; | |
2715 | } | |
2716 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2717 | /* Count an interval if it either overlaps the range |
2718 | or is empty at the start of the range. */ | |
74514898 | 2719 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2720 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2721 | { |
2722 | if (idx == len) | |
2723 | { | |
2724 | if (extend) | |
2725 | { | |
4b0e44fc RS |
2726 | /* Make it work with an initial len == 0. */ |
2727 | len *= 2; | |
2728 | if (len == 0) | |
2729 | len = 4; | |
2730 | *len_ptr = len; | |
74514898 RS |
2731 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2732 | *vec_ptr = vec; | |
2733 | } | |
2734 | else | |
2735 | inhibit_storing = 1; | |
2736 | } | |
2737 | ||
2738 | if (!inhibit_storing) | |
2739 | vec[idx] = overlay; | |
2740 | idx++; | |
2741 | } | |
2742 | else if (endpos < beg && endpos > prev) | |
2743 | prev = endpos; | |
2744 | } | |
fc04fa47 | 2745 | |
74514898 RS |
2746 | if (next_ptr) |
2747 | *next_ptr = next; | |
2748 | if (prev_ptr) | |
2749 | *prev_ptr = prev; | |
2750 | return idx; | |
2751 | } | |
09a22085 GM |
2752 | |
2753 | ||
2754 | /* Return non-zero if there exists an overlay with a non-nil | |
2755 | `mouse-face' property overlapping OVERLAY. */ | |
2756 | ||
2757 | int | |
2758 | mouse_face_overlay_overlaps (overlay) | |
2759 | Lisp_Object overlay; | |
2760 | { | |
2761 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2762 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2763 | int n, i, size; |
09a22085 | 2764 | Lisp_Object *v, tem; |
177c0ea7 | 2765 | |
bfd8410f GM |
2766 | size = 10; |
2767 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2768 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2769 | if (n > size) | |
09a22085 | 2770 | { |
09a22085 GM |
2771 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2772 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2773 | } | |
2774 | ||
2775 | for (i = 0; i < n; ++i) | |
2776 | if (!EQ (v[i], overlay) | |
2777 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2778 | !NILP (tem))) | |
2779 | break; | |
2780 | ||
2781 | return i < n; | |
2782 | } | |
2783 | ||
2784 | ||
74514898 | 2785 | \f |
fc04fa47 KH |
2786 | /* Fast function to just test if we're at an overlay boundary. */ |
2787 | int | |
2788 | overlay_touches_p (pos) | |
2789 | int pos; | |
2790 | { | |
2410d73a SM |
2791 | Lisp_Object overlay; |
2792 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2793 | |
2410d73a | 2794 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2795 | { |
2796 | int endpos; | |
2797 | ||
2410d73a | 2798 | XSETMISC (overlay ,tail); |
fc04fa47 KH |
2799 | if (!GC_OVERLAYP (overlay)) |
2800 | abort (); | |
2801 | ||
2802 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2803 | if (endpos < pos) | |
2804 | break; | |
2805 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2806 | return 1; | |
2807 | } | |
2808 | ||
2410d73a | 2809 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2810 | { |
2811 | int startpos; | |
2812 | ||
2410d73a | 2813 | XSETMISC (overlay, tail); |
fc04fa47 KH |
2814 | if (!GC_OVERLAYP (overlay)) |
2815 | abort (); | |
2816 | ||
2817 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2818 | if (pos < startpos) | |
2819 | break; | |
2820 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2821 | return 1; | |
2822 | } | |
2823 | return 0; | |
2824 | } | |
2eec3b4e | 2825 | \f |
5985d248 KH |
2826 | struct sortvec |
2827 | { | |
2828 | Lisp_Object overlay; | |
2829 | int beg, end; | |
2830 | int priority; | |
2831 | }; | |
2832 | ||
2833 | static int | |
dfcf069d AS |
2834 | compare_overlays (v1, v2) |
2835 | const void *v1, *v2; | |
5985d248 | 2836 | { |
dfcf069d AS |
2837 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2838 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2839 | if (s1->priority != s2->priority) |
2840 | return s1->priority - s2->priority; | |
2841 | if (s1->beg != s2->beg) | |
2842 | return s1->beg - s2->beg; | |
2843 | if (s1->end != s2->end) | |
2844 | return s2->end - s1->end; | |
2845 | return 0; | |
2846 | } | |
2847 | ||
2848 | /* Sort an array of overlays by priority. The array is modified in place. | |
2849 | The return value is the new size; this may be smaller than the original | |
2850 | size if some of the overlays were invalid or were window-specific. */ | |
2851 | int | |
2852 | sort_overlays (overlay_vec, noverlays, w) | |
2853 | Lisp_Object *overlay_vec; | |
2854 | int noverlays; | |
2855 | struct window *w; | |
2856 | { | |
2857 | int i, j; | |
2858 | struct sortvec *sortvec; | |
2859 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2860 | ||
2861 | /* Put the valid and relevant overlays into sortvec. */ | |
2862 | ||
2863 | for (i = 0, j = 0; i < noverlays; i++) | |
2864 | { | |
0fa767e7 | 2865 | Lisp_Object tem; |
c99fc30f | 2866 | Lisp_Object overlay; |
5985d248 | 2867 | |
c99fc30f | 2868 | overlay = overlay_vec[i]; |
5985d248 KH |
2869 | if (OVERLAY_VALID (overlay) |
2870 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2871 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2872 | { | |
0fa767e7 KH |
2873 | /* If we're interested in a specific window, then ignore |
2874 | overlays that are limited to some other window. */ | |
2875 | if (w) | |
5985d248 | 2876 | { |
0fa767e7 KH |
2877 | Lisp_Object window; |
2878 | ||
2879 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2880 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2881 | continue; |
5985d248 | 2882 | } |
0fa767e7 KH |
2883 | |
2884 | /* This overlay is good and counts: put it into sortvec. */ | |
2885 | sortvec[j].overlay = overlay; | |
2886 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2887 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2888 | tem = Foverlay_get (overlay, Qpriority); | |
2889 | if (INTEGERP (tem)) | |
2890 | sortvec[j].priority = XINT (tem); | |
2891 | else | |
2892 | sortvec[j].priority = 0; | |
2893 | j++; | |
5985d248 KH |
2894 | } |
2895 | } | |
2896 | noverlays = j; | |
2897 | ||
2898 | /* Sort the overlays into the proper order: increasing priority. */ | |
2899 | ||
2900 | if (noverlays > 1) | |
2901 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2902 | ||
2903 | for (i = 0; i < noverlays; i++) | |
2904 | overlay_vec[i] = sortvec[i].overlay; | |
2905 | return (noverlays); | |
2906 | } | |
2907 | \f | |
bbbe9545 KH |
2908 | struct sortstr |
2909 | { | |
cb26008f | 2910 | Lisp_Object string, string2; |
bbbe9545 KH |
2911 | int size; |
2912 | int priority; | |
2913 | }; | |
2914 | ||
e8185fa8 KH |
2915 | struct sortstrlist |
2916 | { | |
2917 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2918 | int size; /* Allocated length of that array. */ | |
2919 | int used; /* How much of the array is currently in use. */ | |
2920 | int bytes; /* Total length of the strings in buf. */ | |
2921 | }; | |
2922 | ||
2923 | /* Buffers for storing information about the overlays touching a given | |
2924 | position. These could be automatic variables in overlay_strings, but | |
2925 | it's more efficient to hold onto the memory instead of repeatedly | |
2926 | allocating and freeing it. */ | |
2927 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2928 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2929 | |
2930 | /* Allocated length of overlay_str_buf. */ | |
2931 | static int overlay_str_len; | |
2932 | ||
bbbe9545 KH |
2933 | /* A comparison function suitable for passing to qsort. */ |
2934 | static int | |
2935 | cmp_for_strings (as1, as2) | |
2936 | char *as1, *as2; | |
2937 | { | |
2938 | struct sortstr *s1 = (struct sortstr *)as1; | |
2939 | struct sortstr *s2 = (struct sortstr *)as2; | |
2940 | if (s1->size != s2->size) | |
2941 | return s2->size - s1->size; | |
2942 | if (s1->priority != s2->priority) | |
2943 | return s1->priority - s2->priority; | |
2944 | return 0; | |
2945 | } | |
2946 | ||
e8185fa8 | 2947 | static void |
cb26008f | 2948 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2949 | struct sortstrlist *ssl; |
cb26008f | 2950 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2951 | int size; |
2952 | { | |
43d27a72 RS |
2953 | int nbytes; |
2954 | ||
e8185fa8 KH |
2955 | if (ssl->used == ssl->size) |
2956 | { | |
2957 | if (ssl->buf) | |
2958 | ssl->size *= 2; | |
2959 | else | |
2960 | ssl->size = 5; | |
2961 | ssl->buf = ((struct sortstr *) | |
2962 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2963 | } | |
2964 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2965 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2966 | ssl->buf[ssl->used].size = size; |
2967 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2968 | ssl->used++; | |
43d27a72 RS |
2969 | |
2970 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2971 | nbytes = SCHARS (str); |
43d27a72 | 2972 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2973 | nbytes = count_size_as_multibyte (SDATA (str), |
2974 | SBYTES (str)); | |
43d27a72 | 2975 | else |
d5db4077 | 2976 | nbytes = SBYTES (str); |
43d27a72 RS |
2977 | |
2978 | ssl->bytes += nbytes; | |
2979 | ||
cb26008f | 2980 | if (STRINGP (str2)) |
43d27a72 RS |
2981 | { |
2982 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2983 | nbytes = SCHARS (str2); |
43d27a72 | 2984 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2985 | nbytes = count_size_as_multibyte (SDATA (str2), |
2986 | SBYTES (str2)); | |
43d27a72 | 2987 | else |
d5db4077 | 2988 | nbytes = SBYTES (str2); |
43d27a72 RS |
2989 | |
2990 | ssl->bytes += nbytes; | |
2991 | } | |
e8185fa8 | 2992 | } |
bbbe9545 KH |
2993 | |
2994 | /* Return the concatenation of the strings associated with overlays that | |
2995 | begin or end at POS, ignoring overlays that are specific to a window | |
2996 | other than W. The strings are concatenated in the appropriate order: | |
2997 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2998 | lower. Normally all of the after-strings come first, but zero-sized |
2999 | overlays have their after-strings ride along with the before-strings | |
3000 | because it would look strange to print them inside-out. | |
3001 | ||
3002 | Returns the string length, and stores the contents indirectly through | |
3003 | PSTR, if that variable is non-null. The string may be overwritten by | |
3004 | subsequent calls. */ | |
6b5d3b89 | 3005 | |
bbbe9545 KH |
3006 | int |
3007 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3008 | EMACS_INT pos; |
bbbe9545 | 3009 | struct window *w; |
6b5d3b89 | 3010 | unsigned char **pstr; |
bbbe9545 | 3011 | { |
2410d73a SM |
3012 | Lisp_Object overlay, window, str; |
3013 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3014 | int startpos, endpos; |
43d27a72 | 3015 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3016 | |
e8185fa8 KH |
3017 | overlay_heads.used = overlay_heads.bytes = 0; |
3018 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3019 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3020 | { |
2410d73a | 3021 | XSETMISC (overlay, ov); |
c2d5b10f | 3022 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3023 | |
3024 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3025 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3026 | if (endpos < pos) | |
3027 | break; | |
3028 | if (endpos != pos && startpos != pos) | |
3029 | continue; | |
3030 | window = Foverlay_get (overlay, Qwindow); | |
3031 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3032 | continue; | |
e8185fa8 KH |
3033 | if (startpos == pos |
3034 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3035 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3036 | (startpos == endpos |
3037 | ? Foverlay_get (overlay, Qafter_string) | |
3038 | : Qnil), | |
3039 | Foverlay_get (overlay, Qpriority), | |
3040 | endpos - startpos); | |
3041 | else if (endpos == pos | |
3042 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3043 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3044 | Foverlay_get (overlay, Qpriority), |
3045 | endpos - startpos); | |
bbbe9545 | 3046 | } |
2410d73a | 3047 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3048 | { |
2410d73a SM |
3049 | XSETMISC (overlay, ov); |
3050 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3051 | |
3052 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3053 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3054 | if (startpos > pos) | |
3055 | break; | |
e8185fa8 KH |
3056 | if (endpos != pos && startpos != pos) |
3057 | continue; | |
3058 | window = Foverlay_get (overlay, Qwindow); | |
3059 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3060 | continue; | |
e8185fa8 KH |
3061 | if (startpos == pos |
3062 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3063 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3064 | (startpos == endpos |
3065 | ? Foverlay_get (overlay, Qafter_string) | |
3066 | : Qnil), | |
3067 | Foverlay_get (overlay, Qpriority), | |
3068 | endpos - startpos); | |
3069 | else if (endpos == pos | |
3070 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3071 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3072 | Foverlay_get (overlay, Qpriority), |
3073 | endpos - startpos); | |
bbbe9545 | 3074 | } |
e8185fa8 KH |
3075 | if (overlay_tails.used > 1) |
3076 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3077 | cmp_for_strings); | |
3078 | if (overlay_heads.used > 1) | |
3079 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3080 | cmp_for_strings); | |
3081 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3082 | { |
e8185fa8 | 3083 | Lisp_Object tem; |
bbbe9545 | 3084 | int i; |
9f4d7cde | 3085 | unsigned char *p; |
e8185fa8 | 3086 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3087 | |
3088 | if (total > overlay_str_len) | |
9f4d7cde RS |
3089 | { |
3090 | overlay_str_len = total; | |
3091 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3092 | total); | |
3093 | } | |
bbbe9545 | 3094 | p = overlay_str_buf; |
e8185fa8 | 3095 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3096 | { |
43d27a72 | 3097 | int nbytes; |
e8185fa8 | 3098 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3099 | nbytes = copy_text (SDATA (tem), p, |
3100 | SBYTES (tem), | |
43d27a72 RS |
3101 | STRING_MULTIBYTE (tem), multibyte); |
3102 | p += nbytes; | |
bbbe9545 | 3103 | } |
e8185fa8 | 3104 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3105 | { |
43d27a72 | 3106 | int nbytes; |
e8185fa8 | 3107 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3108 | nbytes = copy_text (SDATA (tem), p, |
3109 | SBYTES (tem), | |
43d27a72 RS |
3110 | STRING_MULTIBYTE (tem), multibyte); |
3111 | p += nbytes; | |
cb26008f KH |
3112 | tem = overlay_heads.buf[i].string2; |
3113 | if (STRINGP (tem)) | |
3114 | { | |
d5db4077 KR |
3115 | nbytes = copy_text (SDATA (tem), p, |
3116 | SBYTES (tem), | |
43d27a72 RS |
3117 | STRING_MULTIBYTE (tem), multibyte); |
3118 | p += nbytes; | |
cb26008f | 3119 | } |
bbbe9545 | 3120 | } |
cb26008f KH |
3121 | if (p != overlay_str_buf + total) |
3122 | abort (); | |
bbbe9545 KH |
3123 | if (pstr) |
3124 | *pstr = overlay_str_buf; | |
e8185fa8 | 3125 | return total; |
bbbe9545 | 3126 | } |
e8185fa8 | 3127 | return 0; |
bbbe9545 KH |
3128 | } |
3129 | \f | |
5c4f68f1 | 3130 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3131 | |
2eec3b4e | 3132 | void |
5c4f68f1 JB |
3133 | recenter_overlay_lists (buf, pos) |
3134 | struct buffer *buf; | |
c2d5b10f | 3135 | EMACS_INT pos; |
2eec3b4e | 3136 | { |
2410d73a SM |
3137 | Lisp_Object overlay, beg, end; |
3138 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3139 | |
3140 | /* See if anything in overlays_before should move to overlays_after. */ | |
3141 | ||
3142 | /* We don't strictly need prev in this loop; it should always be nil. | |
3143 | But we use it for symmetry and in case that should cease to be true | |
3144 | with some future change. */ | |
2410d73a SM |
3145 | prev = NULL; |
3146 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3147 | { |
2410d73a SM |
3148 | next = tail->next; |
3149 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3150 | |
3151 | /* If the overlay is not valid, get rid of it. */ | |
3152 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3153 | #if 1 |
3154 | abort (); | |
3155 | #else | |
2eec3b4e RS |
3156 | { |
3157 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3158 | if (!NILP (prev)) | |
7539e11f | 3159 | XCDR (prev) = next; |
2eec3b4e | 3160 | else |
5c4f68f1 | 3161 | buf->overlays_before = next; |
2eec3b4e RS |
3162 | tail = prev; |
3163 | continue; | |
3164 | } | |
52f8ec73 | 3165 | #endif |
1ab256cb | 3166 | |
2eec3b4e RS |
3167 | beg = OVERLAY_START (overlay); |
3168 | end = OVERLAY_END (overlay); | |
1ab256cb | 3169 | |
2eec3b4e | 3170 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3171 | { |
2eec3b4e RS |
3172 | /* OVERLAY needs to be moved. */ |
3173 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3174 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3175 | |
3176 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3177 | if (prev) |
3178 | prev->next = next; | |
2eec3b4e | 3179 | else |
5c4f68f1 | 3180 | buf->overlays_before = next; |
2eec3b4e RS |
3181 | |
3182 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3183 | other_prev = NULL; |
3184 | for (other = buf->overlays_after; other; | |
3185 | other_prev = other, other = other->next) | |
1ab256cb | 3186 | { |
6af718a4 | 3187 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3188 | |
2410d73a SM |
3189 | XSETMISC (otheroverlay, other); |
3190 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3191 | |
3192 | otherbeg = OVERLAY_START (otheroverlay); | |
3193 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3194 | break; | |
1ab256cb | 3195 | } |
2eec3b4e RS |
3196 | |
3197 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3198 | tail->next = other; |
3199 | if (other_prev) | |
3200 | other_prev->next = tail; | |
1ab256cb | 3201 | else |
5c4f68f1 | 3202 | buf->overlays_after = tail; |
2eec3b4e | 3203 | tail = prev; |
1ab256cb | 3204 | } |
2eec3b4e RS |
3205 | else |
3206 | /* We've reached the things that should stay in overlays_before. | |
3207 | All the rest of overlays_before must end even earlier, | |
3208 | so stop now. */ | |
3209 | break; | |
3210 | } | |
3211 | ||
3212 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3213 | prev = NULL; |
3214 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3215 | { |
2410d73a SM |
3216 | next = tail->next; |
3217 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3218 | |
3219 | /* If the overlay is not valid, get rid of it. */ | |
3220 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3221 | #if 1 |
3222 | abort (); | |
3223 | #else | |
2eec3b4e RS |
3224 | { |
3225 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3226 | if (!NILP (prev)) | |
7539e11f | 3227 | XCDR (prev) = next; |
2eec3b4e | 3228 | else |
5c4f68f1 | 3229 | buf->overlays_after = next; |
2eec3b4e RS |
3230 | tail = prev; |
3231 | continue; | |
3232 | } | |
52f8ec73 | 3233 | #endif |
2eec3b4e RS |
3234 | |
3235 | beg = OVERLAY_START (overlay); | |
3236 | end = OVERLAY_END (overlay); | |
3237 | ||
3238 | /* Stop looking, when we know that nothing further | |
3239 | can possibly end before POS. */ | |
3240 | if (OVERLAY_POSITION (beg) > pos) | |
3241 | break; | |
3242 | ||
3243 | if (OVERLAY_POSITION (end) <= pos) | |
3244 | { | |
3245 | /* OVERLAY needs to be moved. */ | |
3246 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3247 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3248 | |
3249 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3250 | if (prev) |
3251 | prev->next = next; | |
2eec3b4e | 3252 | else |
5c4f68f1 | 3253 | buf->overlays_after = next; |
2eec3b4e RS |
3254 | |
3255 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3256 | other_prev = NULL; |
3257 | for (other = buf->overlays_before; other; | |
3258 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3259 | { |
3260 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3261 | |
2410d73a SM |
3262 | XSETMISC (otheroverlay, other); |
3263 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3264 | |
3265 | otherend = OVERLAY_END (otheroverlay); | |
3266 | if (OVERLAY_POSITION (otherend) <= where) | |
3267 | break; | |
3268 | } | |
3269 | ||
3270 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3271 | tail->next = other; |
3272 | if (other_prev) | |
3273 | other_prev->next = tail; | |
2eec3b4e | 3274 | else |
5c4f68f1 | 3275 | buf->overlays_before = tail; |
2eec3b4e RS |
3276 | tail = prev; |
3277 | } | |
3278 | } | |
3279 | ||
c2d5b10f | 3280 | buf->overlay_center = pos; |
2eec3b4e | 3281 | } |
2b1bdf65 | 3282 | |
423cdb46 KH |
3283 | void |
3284 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3285 | EMACS_INT pos; |
3286 | EMACS_INT length; | |
423cdb46 KH |
3287 | { |
3288 | /* After an insertion, the lists are still sorted properly, | |
3289 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3290 | if (current_buffer->overlay_center >= pos) |
3291 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3292 | } |
3293 | ||
3294 | void | |
3295 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3296 | EMACS_INT pos; |
3297 | EMACS_INT length; | |
423cdb46 | 3298 | { |
c2d5b10f | 3299 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3300 | /* The deletion was to our right. No change needed; the before- and |
3301 | after-lists are still consistent. */ | |
3302 | ; | |
c2d5b10f | 3303 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3304 | /* The deletion was to our left. We need to adjust the center value |
3305 | to account for the change in position, but the lists are consistent | |
3306 | given the new value. */ | |
c2d5b10f | 3307 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3308 | else |
3309 | /* We're right in the middle. There might be things on the after-list | |
3310 | that now belong on the before-list. Recentering will move them, | |
3311 | and also update the center point. */ | |
3312 | recenter_overlay_lists (current_buffer, pos); | |
3313 | } | |
3314 | ||
2b1bdf65 KH |
3315 | /* Fix up overlays that were garbled as a result of permuting markers |
3316 | in the range START through END. Any overlay with at least one | |
3317 | endpoint in this range will need to be unlinked from the overlay | |
3318 | list and reinserted in its proper place. | |
3319 | Such an overlay might even have negative size at this point. | |
99a72bdf | 3320 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3321 | void |
abdb9b83 | 3322 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3323 | register int start, end; |
3324 | { | |
6af718a4 | 3325 | Lisp_Object overlay; |
2410d73a | 3326 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3327 | /* These are either nil, indicating that before_list or after_list |
3328 | should be assigned, or the cons cell the cdr of which should be | |
3329 | assigned. */ | |
2410d73a | 3330 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3331 | /* 'Parent', likewise, indicates a cons cell or |
3332 | current_buffer->overlays_before or overlays_after, depending | |
3333 | which loop we're in. */ | |
2410d73a | 3334 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3335 | int startpos, endpos; |
3336 | ||
3337 | /* This algorithm shifts links around instead of consing and GCing. | |
3338 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3339 | well-formed list except that its last element, the CDR of beforep |
3340 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3341 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3342 | that before_list isn't initialized, although it may look | |
3343 | strange. */ | |
2410d73a | 3344 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3345 | { |
2410d73a | 3346 | XSETMISC (overlay, tail); |
99a72bdf | 3347 | |
2b1bdf65 | 3348 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
99a72bdf MY |
3349 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3350 | ||
3351 | /* If the overlay is backwards, make it empty. */ | |
3352 | if (endpos < startpos) | |
3353 | { | |
3354 | startpos = endpos; | |
3355 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3356 | Qnil); | |
3357 | } | |
3358 | ||
2b1bdf65 KH |
3359 | if (endpos < start) |
3360 | break; | |
60ebfdf3 | 3361 | |
2b1bdf65 KH |
3362 | if (endpos < end |
3363 | || (startpos >= start && startpos < end)) | |
3364 | { | |
2b1bdf65 KH |
3365 | /* Add it to the end of the wrong list. Later on, |
3366 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3367 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3368 | { |
2410d73a | 3369 | if (!afterp) |
1138e742 KR |
3370 | after_list = tail; |
3371 | else | |
2410d73a | 3372 | afterp->next = tail; |
1138e742 | 3373 | afterp = tail; |
2b1bdf65 KH |
3374 | } |
3375 | else | |
3376 | { | |
2410d73a | 3377 | if (!beforep) |
1138e742 KR |
3378 | before_list = tail; |
3379 | else | |
2410d73a | 3380 | beforep->next = tail; |
1138e742 | 3381 | beforep = tail; |
2b1bdf65 | 3382 | } |
2410d73a SM |
3383 | if (!parent) |
3384 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3385 | else |
2410d73a SM |
3386 | parent->next = tail->next; |
3387 | tail = tail->next; | |
2b1bdf65 KH |
3388 | } |
3389 | else | |
2410d73a | 3390 | parent = tail, tail = parent->next; |
2b1bdf65 | 3391 | } |
2410d73a | 3392 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3393 | { |
2410d73a | 3394 | XSETMISC (overlay, tail); |
99a72bdf | 3395 | |
2b1bdf65 | 3396 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
99a72bdf MY |
3397 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3398 | ||
3399 | /* If the overlay is backwards, make it empty. */ | |
3400 | if (endpos < startpos) | |
3401 | { | |
3402 | startpos = endpos; | |
3403 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3404 | Qnil); |
99a72bdf MY |
3405 | } |
3406 | ||
2b1bdf65 KH |
3407 | if (startpos >= end) |
3408 | break; | |
99a72bdf | 3409 | |
2b1bdf65 KH |
3410 | if (startpos >= start |
3411 | || (endpos >= start && endpos < end)) | |
3412 | { | |
c2d5b10f | 3413 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3414 | { |
2410d73a | 3415 | if (!afterp) |
1138e742 KR |
3416 | after_list = tail; |
3417 | else | |
2410d73a | 3418 | afterp->next = tail; |
1138e742 | 3419 | afterp = tail; |
2b1bdf65 KH |
3420 | } |
3421 | else | |
3422 | { | |
2410d73a | 3423 | if (!beforep) |
1138e742 KR |
3424 | before_list = tail; |
3425 | else | |
2410d73a | 3426 | beforep->next = tail; |
1138e742 | 3427 | beforep = tail; |
2b1bdf65 | 3428 | } |
2410d73a SM |
3429 | if (!parent) |
3430 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3431 | else |
2410d73a SM |
3432 | parent->next = tail->next; |
3433 | tail = tail->next; | |
2b1bdf65 KH |
3434 | } |
3435 | else | |
2410d73a | 3436 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3437 | } |
3438 | ||
3439 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3440 | and let the recenter function make it sane again. */ | |
2410d73a | 3441 | if (beforep) |
1138e742 | 3442 | { |
2410d73a | 3443 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3444 | current_buffer->overlays_before = before_list; |
3445 | } | |
c2d5b10f | 3446 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3447 | |
2410d73a | 3448 | if (afterp) |
1138e742 | 3449 | { |
2410d73a | 3450 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3451 | current_buffer->overlays_after = after_list; |
3452 | } | |
c2d5b10f | 3453 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3454 | } |
3b06f880 KH |
3455 | |
3456 | /* We have two types of overlay: the one whose ending marker is | |
3457 | after-insertion-marker (this is the usual case) and the one whose | |
3458 | ending marker is before-insertion-marker. When `overlays_before' | |
3459 | contains overlays of the latter type and the former type in this | |
3460 | order and both overlays end at inserting position, inserting a text | |
3461 | increases only the ending marker of the latter type, which results | |
3462 | in incorrect ordering of `overlays_before'. | |
3463 | ||
3464 | This function fixes ordering of overlays in the slot | |
3465 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3466 | was at PREV, and now is at POS. */ | |
3467 | ||
01136e9b | 3468 | void |
3b06f880 KH |
3469 | fix_overlays_before (bp, prev, pos) |
3470 | struct buffer *bp; | |
c2d5b10f | 3471 | EMACS_INT prev, pos; |
3b06f880 | 3472 | { |
2410d73a SM |
3473 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3474 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3475 | Lisp_Object tem; | |
c2d5b10f | 3476 | EMACS_INT end; |
3b06f880 KH |
3477 | |
3478 | /* After the insertion, the several overlays may be in incorrect | |
3479 | order. The possibility is that, in the list `overlays_before', | |
3480 | an overlay which ends at POS appears after an overlay which ends | |
3481 | at PREV. Since POS is greater than PREV, we must fix the | |
3482 | ordering of these overlays, by moving overlays ends at POS before | |
3483 | the overlays ends at PREV. */ | |
3484 | ||
3485 | /* At first, find a place where disordered overlays should be linked | |
3486 | in. It is where an overlay which end before POS exists. (i.e. an | |
3487 | overlay whose ending marker is after-insertion-marker if disorder | |
3488 | exists). */ | |
2410d73a SM |
3489 | while (tail |
3490 | && (XSETMISC (tem, tail), | |
3491 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3492 | { |
3493 | parent = tail; | |
2410d73a | 3494 | tail = tail->next; |
1138e742 | 3495 | } |
3b06f880 KH |
3496 | |
3497 | /* If we don't find such an overlay, | |
3498 | or the found one ends before PREV, | |
3499 | or the found one is the last one in the list, | |
3500 | we don't have to fix anything. */ | |
f93ad4cf | 3501 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3502 | return; |
3503 | ||
1138e742 KR |
3504 | right_pair = parent; |
3505 | parent = tail; | |
2410d73a | 3506 | tail = tail->next; |
3b06f880 | 3507 | |
1138e742 | 3508 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3509 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3510 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3511 | we found an overlay which ends before PREV, the remaining | |
3512 | overlays are in correct order. */ | |
2410d73a | 3513 | while (tail) |
3b06f880 | 3514 | { |
2410d73a SM |
3515 | XSETMISC (tem, tail); |
3516 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3517 | |
3518 | if (end == pos) | |
3519 | { /* This overlay is disordered. */ | |
2410d73a | 3520 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3521 | |
3522 | /* Unlink the found overlay. */ | |
2410d73a SM |
3523 | tail = found->next; |
3524 | parent->next = tail; | |
1138e742 KR |
3525 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3526 | and link it into the right place. */ | |
2410d73a | 3527 | if (!right_pair) |
1138e742 | 3528 | { |
2410d73a | 3529 | found->next = bp->overlays_before; |
1138e742 KR |
3530 | bp->overlays_before = found; |
3531 | } | |
3532 | else | |
3533 | { | |
2410d73a SM |
3534 | found->next = right_pair->next; |
3535 | right_pair->next = found; | |
1138e742 | 3536 | } |
3b06f880 KH |
3537 | } |
3538 | else if (end == prev) | |
1138e742 KR |
3539 | { |
3540 | parent = tail; | |
2410d73a | 3541 | tail = tail->next; |
1138e742 | 3542 | } |
3b06f880 KH |
3543 | else /* No more disordered overlay. */ |
3544 | break; | |
3545 | } | |
3546 | } | |
2eec3b4e | 3547 | \f |
52f8ec73 | 3548 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3549 | doc: /* Return t if OBJECT is an overlay. */) |
3550 | (object) | |
52f8ec73 JB |
3551 | Lisp_Object object; |
3552 | { | |
3553 | return (OVERLAYP (object) ? Qt : Qnil); | |
3554 | } | |
3555 | ||
acac2700 | 3556 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3557 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3558 | If omitted, BUFFER defaults to the current buffer. |
3559 | BEG and END may be integers or markers. | |
3560 | The fourth arg FRONT-ADVANCE, if non-nil, makes the | |
3561 | front delimiter advance when text is inserted there. | |
3562 | The fifth arg REAR-ADVANCE, if non-nil, makes the | |
7ee72033 MB |
3563 | rear delimiter advance when text is inserted there. */) |
3564 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3565 | Lisp_Object beg, end, buffer; |
acac2700 | 3566 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3567 | { |
3568 | Lisp_Object overlay; | |
5c4f68f1 | 3569 | struct buffer *b; |
2eec3b4e | 3570 | |
5c4f68f1 | 3571 | if (NILP (buffer)) |
67180c6a | 3572 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3573 | else |
b7826503 | 3574 | CHECK_BUFFER (buffer); |
883047b9 JB |
3575 | if (MARKERP (beg) |
3576 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3577 | error ("Marker points into wrong buffer"); | |
3578 | if (MARKERP (end) | |
3579 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3580 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3581 | |
b7826503 PJ |
3582 | CHECK_NUMBER_COERCE_MARKER (beg); |
3583 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3584 | |
883047b9 | 3585 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3586 | { |
c99fc30f KH |
3587 | Lisp_Object temp; |
3588 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3589 | } |
883047b9 JB |
3590 | |
3591 | b = XBUFFER (buffer); | |
3592 | ||
3593 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3594 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3595 | |
acac2700 RS |
3596 | if (!NILP (front_advance)) |
3597 | XMARKER (beg)->insertion_type = 1; | |
3598 | if (!NILP (rear_advance)) | |
3599 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3600 | |
48e2e3ba | 3601 | overlay = allocate_misc (); |
89ca3e1b | 3602 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3603 | XOVERLAY (overlay)->start = beg; |
3604 | XOVERLAY (overlay)->end = end; | |
3605 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3606 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3607 | |
177c0ea7 | 3608 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3609 | end = OVERLAY_END (overlay); |
c2d5b10f | 3610 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3611 | { |
3612 | if (b->overlays_after) | |
3613 | XOVERLAY (overlay)->next = b->overlays_after; | |
3614 | b->overlays_after = XOVERLAY (overlay); | |
3615 | } | |
2eec3b4e | 3616 | else |
2410d73a SM |
3617 | { |
3618 | if (b->overlays_before) | |
3619 | XOVERLAY (overlay)->next = b->overlays_before; | |
3620 | b->overlays_before = XOVERLAY (overlay); | |
3621 | } | |
2eec3b4e RS |
3622 | |
3623 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3624 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3625 | |
b61982dd JB |
3626 | /* We don't need to redisplay the region covered by the overlay, because |
3627 | the overlay has no properties at the moment. */ | |
3628 | ||
2eec3b4e RS |
3629 | return overlay; |
3630 | } | |
876aa27c RS |
3631 | \f |
3632 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3633 | ||
3634 | static void | |
3635 | modify_overlay (buf, start, end) | |
3636 | struct buffer *buf; | |
c2d5b10f | 3637 | EMACS_INT start, end; |
876aa27c | 3638 | { |
876aa27c RS |
3639 | if (start > end) |
3640 | { | |
3641 | int temp = start; | |
26f545d7 GM |
3642 | start = end; |
3643 | end = temp; | |
876aa27c RS |
3644 | } |
3645 | ||
481b5054 | 3646 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3647 | |
876aa27c RS |
3648 | /* If this is a buffer not in the selected window, |
3649 | we must do other windows. */ | |
3650 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3651 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3652 | /* If multiple windows show this buffer, we must do other windows. */ |
3653 | else if (buffer_shared > 1) | |
3654 | windows_or_buffers_changed = 1; | |
876aa27c | 3655 | |
d8b9150f | 3656 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3657 | } |
2eec3b4e | 3658 | |
018ba359 | 3659 | \f |
2e34157c RS |
3660 | Lisp_Object Fdelete_overlay (); |
3661 | ||
2410d73a SM |
3662 | static struct Lisp_Overlay * |
3663 | unchain_overlay (list, overlay) | |
3664 | struct Lisp_Overlay *list, *overlay; | |
3665 | { | |
3666 | struct Lisp_Overlay *tmp, *prev; | |
3667 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3668 | if (tmp == overlay) | |
3669 | { | |
3670 | if (prev) | |
3671 | prev->next = tmp->next; | |
3672 | else | |
3673 | list = tmp->next; | |
3674 | overlay->next = NULL; | |
3675 | break; | |
3676 | } | |
3677 | return list; | |
3678 | } | |
3679 | ||
5c4f68f1 | 3680 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3681 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3682 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3683 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3684 | buffer. */) |
3685 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3686 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3687 | { |
0a4469c9 RS |
3688 | struct buffer *b, *ob; |
3689 | Lisp_Object obuffer; | |
aed13378 | 3690 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3691 | |
b7826503 | 3692 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3693 | if (NILP (buffer)) |
3694 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3695 | if (NILP (buffer)) |
67180c6a | 3696 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3697 | CHECK_BUFFER (buffer); |
883047b9 JB |
3698 | |
3699 | if (MARKERP (beg) | |
3700 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3701 | error ("Marker points into wrong buffer"); | |
3702 | if (MARKERP (end) | |
3703 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3704 | error ("Marker points into wrong buffer"); | |
3705 | ||
b7826503 PJ |
3706 | CHECK_NUMBER_COERCE_MARKER (beg); |
3707 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3708 | |
9d7608b7 KH |
3709 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3710 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3711 | |
b61982dd JB |
3712 | if (XINT (beg) > XINT (end)) |
3713 | { | |
c99fc30f KH |
3714 | Lisp_Object temp; |
3715 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3716 | } |
3717 | ||
9d7608b7 KH |
3718 | specbind (Qinhibit_quit, Qt); |
3719 | ||
0a4469c9 | 3720 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3721 | b = XBUFFER (buffer); |
8801a864 | 3722 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3723 | |
c82ed728 | 3724 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3725 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3726 | { |
3727 | /* Redisplay where the overlay was. */ | |
3728 | if (!NILP (obuffer)) | |
3729 | { | |
2e34157c RS |
3730 | int o_beg; |
3731 | int o_end; | |
50760c4a | 3732 | |
80509f2f RS |
3733 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3734 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3735 | |
2e34157c | 3736 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3737 | } |
3738 | ||
3739 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3740 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3741 | } |
c82ed728 JB |
3742 | else |
3743 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3744 | { | |
2e34157c | 3745 | int o_beg, o_end; |
c82ed728 | 3746 | |
80509f2f RS |
3747 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3748 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3749 | |
2e34157c RS |
3750 | if (o_beg == XINT (beg)) |
3751 | modify_overlay (b, o_end, XINT (end)); | |
3752 | else if (o_end == XINT (end)) | |
3753 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3754 | else |
3755 | { | |
2e34157c RS |
3756 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3757 | if (XINT (end) > o_end) o_end = XINT (end); | |
3758 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3759 | } |
3760 | } | |
b61982dd | 3761 | |
0a4469c9 RS |
3762 | if (!NILP (obuffer)) |
3763 | { | |
2410d73a SM |
3764 | ob->overlays_before |
3765 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3766 | ob->overlays_after | |
3767 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3768 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3769 | } |
5c4f68f1 JB |
3770 | |
3771 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3772 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3773 | |
177c0ea7 | 3774 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3775 | end = OVERLAY_END (overlay); |
c2d5b10f | 3776 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3777 | { |
2f297815 GM |
3778 | XOVERLAY (overlay)->next = b->overlays_after; |
3779 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3780 | } |
2eec3b4e | 3781 | else |
2410d73a | 3782 | { |
2f297815 GM |
3783 | XOVERLAY (overlay)->next = b->overlays_before; |
3784 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3785 | } |
2eec3b4e RS |
3786 | |
3787 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3788 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3789 | |
0a4469c9 | 3790 | return unbind_to (count, overlay); |
2eec3b4e RS |
3791 | } |
3792 | ||
3793 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3794 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3795 | (overlay) | |
5c4f68f1 | 3796 | Lisp_Object overlay; |
2eec3b4e | 3797 | { |
0a4469c9 | 3798 | Lisp_Object buffer; |
5c4f68f1 | 3799 | struct buffer *b; |
aed13378 | 3800 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3801 | |
b7826503 | 3802 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3803 | |
0a4469c9 RS |
3804 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3805 | if (NILP (buffer)) | |
3806 | return Qnil; | |
3807 | ||
3808 | b = XBUFFER (buffer); | |
0a4469c9 | 3809 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3810 | |
2410d73a SM |
3811 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3812 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3813 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3814 | modify_overlay (b, |
8231a9aa RS |
3815 | marker_position (OVERLAY_START (overlay)), |
3816 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3817 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3818 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3819 | ||
e58c389d | 3820 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3821 | display optimizations for the affected buffer, on the basis that |
3822 | these strings may contain newlines. This is easier to do than to | |
3823 | check for that situation during redisplay. */ | |
3824 | if (!windows_or_buffers_changed | |
3825 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3826 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3827 | b->prevent_redisplay_optimizations_p = 1; | |
3828 | ||
0a4469c9 | 3829 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3830 | } |
3831 | \f | |
8ebafa8d JB |
3832 | /* Overlay dissection functions. */ |
3833 | ||
3834 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3835 | doc: /* Return the position at which OVERLAY starts. */) |
3836 | (overlay) | |
8ebafa8d JB |
3837 | Lisp_Object overlay; |
3838 | { | |
b7826503 | 3839 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3840 | |
3841 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3842 | } | |
3843 | ||
3844 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3845 | doc: /* Return the position at which OVERLAY ends. */) |
3846 | (overlay) | |
8ebafa8d JB |
3847 | Lisp_Object overlay; |
3848 | { | |
b7826503 | 3849 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3850 | |
3851 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3852 | } | |
3853 | ||
3854 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3855 | doc: /* Return the buffer OVERLAY belongs to. |
3856 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 3857 | (overlay) |
8ebafa8d JB |
3858 | Lisp_Object overlay; |
3859 | { | |
b7826503 | 3860 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3861 | |
3862 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3863 | } | |
3864 | ||
3865 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3866 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3867 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3868 | OVERLAY. */) |
3869 | (overlay) | |
8ebafa8d JB |
3870 | Lisp_Object overlay; |
3871 | { | |
b7826503 | 3872 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3873 | |
48e2e3ba | 3874 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3875 | } |
3876 | ||
3877 | \f | |
2eec3b4e | 3878 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3879 | doc: /* Return a list of the overlays that contain position POS. */) |
3880 | (pos) | |
2eec3b4e RS |
3881 | Lisp_Object pos; |
3882 | { | |
3883 | int noverlays; | |
2eec3b4e RS |
3884 | Lisp_Object *overlay_vec; |
3885 | int len; | |
3886 | Lisp_Object result; | |
3887 | ||
b7826503 | 3888 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3889 | |
3890 | len = 10; | |
a9800ae8 | 3891 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3892 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3893 | ||
3894 | /* Put all the overlays we want in a vector in overlay_vec. | |
3895 | Store the length in len. */ | |
2a77a7d7 | 3896 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3897 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3898 | |
3899 | /* Make a list of them all. */ | |
3900 | result = Flist (noverlays, overlay_vec); | |
3901 | ||
9ac0d9e0 | 3902 | xfree (overlay_vec); |
2eec3b4e RS |
3903 | return result; |
3904 | } | |
3905 | ||
74514898 | 3906 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3907 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3908 | Overlap means that at least one character is contained within the overlay |
3909 | and also contained within the specified region. | |
3910 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3911 | or between BEG and END. */) |
3912 | (beg, end) | |
74514898 RS |
3913 | Lisp_Object beg, end; |
3914 | { | |
3915 | int noverlays; | |
3916 | Lisp_Object *overlay_vec; | |
3917 | int len; | |
3918 | Lisp_Object result; | |
3919 | ||
b7826503 PJ |
3920 | CHECK_NUMBER_COERCE_MARKER (beg); |
3921 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3922 | |
3923 | len = 10; | |
3924 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3925 | ||
3926 | /* Put all the overlays we want in a vector in overlay_vec. | |
3927 | Store the length in len. */ | |
3928 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3929 | (int *) 0, (int *) 0); | |
3930 | ||
3931 | /* Make a list of them all. */ | |
3932 | result = Flist (noverlays, overlay_vec); | |
3933 | ||
3934 | xfree (overlay_vec); | |
3935 | return result; | |
3936 | } | |
3937 | ||
2eec3b4e | 3938 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3939 | 1, 1, 0, |
7ee72033 MB |
3940 | doc: /* Return the next position after POS where an overlay starts or ends. |
3941 | If there are no more overlay boundaries after POS, return (point-max). */) | |
3942 | (pos) | |
2eec3b4e RS |
3943 | Lisp_Object pos; |
3944 | { | |
3945 | int noverlays; | |
3946 | int endpos; | |
3947 | Lisp_Object *overlay_vec; | |
3948 | int len; | |
2eec3b4e RS |
3949 | int i; |
3950 | ||
b7826503 | 3951 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3952 | |
3953 | len = 10; | |
3954 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3955 | ||
3956 | /* Put all the overlays we want in a vector in overlay_vec. | |
3957 | Store the length in len. | |
3958 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3959 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3960 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3961 | |
3962 | /* If any of these overlays ends before endpos, | |
3963 | use its ending point instead. */ | |
3964 | for (i = 0; i < noverlays; i++) | |
3965 | { | |
3966 | Lisp_Object oend; | |
3967 | int oendpos; | |
3968 | ||
3969 | oend = OVERLAY_END (overlay_vec[i]); | |
3970 | oendpos = OVERLAY_POSITION (oend); | |
3971 | if (oendpos < endpos) | |
3972 | endpos = oendpos; | |
1ab256cb RM |
3973 | } |
3974 | ||
9ac0d9e0 | 3975 | xfree (overlay_vec); |
2eec3b4e RS |
3976 | return make_number (endpos); |
3977 | } | |
239c932b RS |
3978 | |
3979 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3980 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 MB |
3981 | doc: /* Return the previous position before POS where an overlay starts or ends. |
3982 | If there are no more overlay boundaries before POS, return (point-min). */) | |
3983 | (pos) | |
239c932b RS |
3984 | Lisp_Object pos; |
3985 | { | |
3986 | int noverlays; | |
3987 | int prevpos; | |
3988 | Lisp_Object *overlay_vec; | |
3989 | int len; | |
239c932b | 3990 | |
b7826503 | 3991 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3992 | |
624bbdc4 RS |
3993 | /* At beginning of buffer, we know the answer; |
3994 | avoid bug subtracting 1 below. */ | |
3995 | if (XINT (pos) == BEGV) | |
3996 | return pos; | |
3997 | ||
017f0539 GM |
3998 | len = 10; |
3999 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4000 | ||
239c932b RS |
4001 | /* Put all the overlays we want in a vector in overlay_vec. |
4002 | Store the length in len. | |
daa1c109 | 4003 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4004 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4005 | (int *) 0, &prevpos, 1); |
239c932b | 4006 | |
239c932b RS |
4007 | xfree (overlay_vec); |
4008 | return make_number (prevpos); | |
4009 | } | |
2eec3b4e RS |
4010 | \f |
4011 | /* These functions are for debugging overlays. */ | |
4012 | ||
4013 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4014 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4015 | The car has all the overlays before the overlay center; |
4016 | the cdr has all the overlays after the overlay center. | |
4017 | Recentering overlays moves overlays between these lists. | |
4018 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4019 | However, the overlays you get are the real objects that the buffer uses. */) |
4020 | () | |
2eec3b4e | 4021 | { |
2410d73a SM |
4022 | struct Lisp_Overlay *ol; |
4023 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4024 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4025 | { | |
4026 | XSETMISC (tmp, ol); | |
4027 | before = Fcons (tmp, before); | |
4028 | } | |
4029 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4030 | { | |
4031 | XSETMISC (tmp, ol); | |
4032 | after = Fcons (tmp, after); | |
4033 | } | |
4034 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4035 | } |
4036 | ||
4037 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4038 | doc: /* Recenter the overlays of the current buffer around position POS. |
4039 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4040 | for positions far away from POS). */) | |
7ee72033 | 4041 | (pos) |
2eec3b4e RS |
4042 | Lisp_Object pos; |
4043 | { | |
b7826503 | 4044 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4045 | |
5c4f68f1 | 4046 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4047 | return Qnil; |
4048 | } | |
4049 | \f | |
4050 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4051 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4052 | (overlay, prop) | |
2eec3b4e RS |
4053 | Lisp_Object overlay, prop; |
4054 | { | |
b7826503 | 4055 | CHECK_OVERLAY (overlay); |
9a593927 | 4056 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4057 | } |
4058 | ||
4059 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4060 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4061 | (overlay, prop, value) | |
2eec3b4e RS |
4062 | Lisp_Object overlay, prop, value; |
4063 | { | |
48e2e3ba | 4064 | Lisp_Object tail, buffer; |
9d7608b7 | 4065 | int changed; |
2eec3b4e | 4066 | |
b7826503 | 4067 | CHECK_OVERLAY (overlay); |
b61982dd | 4068 | |
274a9425 RS |
4069 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4070 | ||
48e2e3ba | 4071 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4072 | CONSP (tail) && CONSP (XCDR (tail)); |
4073 | tail = XCDR (XCDR (tail))) | |
4074 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4075 | { |
7539e11f | 4076 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4077 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4078 | goto found; |
274a9425 | 4079 | } |
9d7608b7 KH |
4080 | /* It wasn't in the list, so add it to the front. */ |
4081 | changed = !NILP (value); | |
48e2e3ba KH |
4082 | XOVERLAY (overlay)->plist |
4083 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4084 | found: |
4085 | if (! NILP (buffer)) | |
4086 | { | |
4087 | if (changed) | |
876aa27c | 4088 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4089 | marker_position (OVERLAY_START (overlay)), |
4090 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4091 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4092 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4093 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4094 | Fdelete_overlay (overlay); | |
4095 | } | |
2eec3b4e | 4096 | return value; |
1ab256cb RM |
4097 | } |
4098 | \f | |
9115729e KH |
4099 | /* Subroutine of report_overlay_modification. */ |
4100 | ||
4101 | /* Lisp vector holding overlay hook functions to call. | |
4102 | Vector elements come in pairs. | |
4103 | Each even-index element is a list of hook functions. | |
4104 | The following odd-index element is the overlay they came from. | |
4105 | ||
4106 | Before the buffer change, we fill in this vector | |
4107 | as we call overlay hook functions. | |
4108 | After the buffer change, we get the functions to call from this vector. | |
4109 | This way we always call the same functions before and after the change. */ | |
4110 | static Lisp_Object last_overlay_modification_hooks; | |
4111 | ||
4112 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4113 | static int last_overlay_modification_hooks_used; | |
4114 | ||
4115 | /* Add one functionlist/overlay pair | |
4116 | to the end of last_overlay_modification_hooks. */ | |
4117 | ||
4118 | static void | |
4119 | add_overlay_mod_hooklist (functionlist, overlay) | |
4120 | Lisp_Object functionlist, overlay; | |
4121 | { | |
4122 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4123 | ||
4124 | if (last_overlay_modification_hooks_used == oldsize) | |
4125 | { | |
4126 | Lisp_Object old; | |
4127 | old = last_overlay_modification_hooks; | |
4128 | last_overlay_modification_hooks | |
4129 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4130 | bcopy (XVECTOR (old)->contents, |
4131 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4132 | sizeof (Lisp_Object) * oldsize); |
4133 | } | |
2410d73a SM |
4134 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = functionlist; |
4135 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = overlay; | |
9115729e KH |
4136 | } |
4137 | \f | |
173f2a64 RS |
4138 | /* Run the modification-hooks of overlays that include |
4139 | any part of the text in START to END. | |
9115729e KH |
4140 | If this change is an insertion, also |
4141 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4142 | and the insert-after-hooks of overlay ending at START. |
4143 | ||
4144 | This is called both before and after the modification. | |
4145 | AFTER is nonzero when we call after the modification. | |
4146 | ||
9115729e KH |
4147 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4148 | When AFTER is nonzero, they are the start position, | |
4149 | the position after the inserted new text, | |
4150 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4151 | |
4152 | void | |
930a9140 | 4153 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4154 | Lisp_Object start, end; |
930a9140 RS |
4155 | int after; |
4156 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4157 | { |
2410d73a SM |
4158 | Lisp_Object prop, overlay; |
4159 | struct Lisp_Overlay *tail; | |
9115729e KH |
4160 | /* 1 if this change is an insertion. */ |
4161 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4162 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4163 | |
4164 | overlay = Qnil; | |
2410d73a | 4165 | tail = NULL; |
9115729e | 4166 | |
27c6b98e SM |
4167 | /* We used to run the functions as soon as we found them and only register |
4168 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4169 | case. But running elisp code as we traverse the list of overlays is | |
4170 | painful because the list can be modified by the elisp code so we had to | |
4171 | copy at several places. We now simply do a read-only traversal that | |
4172 | only collects the functions to run and we run them afterwards. It's | |
4173 | simpler, especially since all the code was already there. -stef */ | |
4174 | ||
a615c6dc | 4175 | if (!after) |
173f2a64 | 4176 | { |
a615c6dc SM |
4177 | /* We are being called before a change. |
4178 | Scan the overlays to find the functions to call. */ | |
4179 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4180 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4181 | { |
a615c6dc SM |
4182 | int startpos, endpos; |
4183 | Lisp_Object ostart, oend; | |
4184 | ||
2410d73a | 4185 | XSETMISC (overlay, tail); |
a615c6dc SM |
4186 | |
4187 | ostart = OVERLAY_START (overlay); | |
4188 | oend = OVERLAY_END (overlay); | |
4189 | endpos = OVERLAY_POSITION (oend); | |
4190 | if (XFASTINT (start) > endpos) | |
4191 | break; | |
4192 | startpos = OVERLAY_POSITION (ostart); | |
4193 | if (insertion && (XFASTINT (start) == startpos | |
4194 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4195 | { |
a615c6dc SM |
4196 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4197 | if (!NILP (prop)) | |
4198 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4199 | } |
a615c6dc SM |
4200 | if (insertion && (XFASTINT (start) == endpos |
4201 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4202 | { |
a615c6dc SM |
4203 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4204 | if (!NILP (prop)) | |
4205 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4206 | } |
a615c6dc SM |
4207 | /* Test for intersecting intervals. This does the right thing |
4208 | for both insertion and deletion. */ | |
4209 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4210 | { |
a615c6dc SM |
4211 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4212 | if (!NILP (prop)) | |
4213 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4214 | } |
173f2a64 | 4215 | } |
60ebfdf3 | 4216 | |
2410d73a | 4217 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4218 | { |
a615c6dc SM |
4219 | int startpos, endpos; |
4220 | Lisp_Object ostart, oend; | |
4221 | ||
2410d73a | 4222 | XSETMISC (overlay, tail); |
a615c6dc SM |
4223 | |
4224 | ostart = OVERLAY_START (overlay); | |
4225 | oend = OVERLAY_END (overlay); | |
4226 | startpos = OVERLAY_POSITION (ostart); | |
4227 | endpos = OVERLAY_POSITION (oend); | |
4228 | if (XFASTINT (end) < startpos) | |
4229 | break; | |
4230 | if (insertion && (XFASTINT (start) == startpos | |
4231 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4232 | { |
a615c6dc SM |
4233 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4234 | if (!NILP (prop)) | |
4235 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4236 | } |
a615c6dc SM |
4237 | if (insertion && (XFASTINT (start) == endpos |
4238 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4239 | { |
a615c6dc SM |
4240 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4241 | if (!NILP (prop)) | |
4242 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4243 | } |
a615c6dc SM |
4244 | /* Test for intersecting intervals. This does the right thing |
4245 | for both insertion and deletion. */ | |
4246 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4247 | { |
a615c6dc SM |
4248 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4249 | if (!NILP (prop)) | |
4250 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4251 | } |
173f2a64 RS |
4252 | } |
4253 | } | |
55b48893 | 4254 | |
a615c6dc SM |
4255 | GCPRO4 (overlay, arg1, arg2, arg3); |
4256 | { | |
4257 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4258 | First copy the vector contents, in case some of these hooks | |
4259 | do subsequent modification of the buffer. */ | |
4260 | int size = last_overlay_modification_hooks_used; | |
4261 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4262 | int i; | |
4263 | ||
4264 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4265 | copy, size * sizeof (Lisp_Object)); | |
4266 | gcpro1.var = copy; | |
4267 | gcpro1.nvars = size; | |
4268 | ||
4269 | for (i = 0; i < size;) | |
4270 | { | |
4271 | Lisp_Object prop, overlay; | |
4272 | prop = copy[i++]; | |
4273 | overlay = copy[i++]; | |
4274 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4275 | } | |
4276 | } | |
55b48893 | 4277 | UNGCPRO; |
173f2a64 RS |
4278 | } |
4279 | ||
4280 | static void | |
930a9140 RS |
4281 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4282 | Lisp_Object list, overlay; | |
4283 | int after; | |
4284 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4285 | { |
930a9140 | 4286 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4287 | |
930a9140 | 4288 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4289 | |
6d70a280 | 4290 | while (CONSP (list)) |
173f2a64 | 4291 | { |
930a9140 | 4292 | if (NILP (arg3)) |
6d70a280 | 4293 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4294 | else |
6d70a280 SM |
4295 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4296 | list = XCDR (list); | |
173f2a64 RS |
4297 | } |
4298 | UNGCPRO; | |
4299 | } | |
9d7608b7 KH |
4300 | |
4301 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4302 | property is set. */ | |
4303 | void | |
4304 | evaporate_overlays (pos) | |
c2d5b10f | 4305 | EMACS_INT pos; |
9d7608b7 | 4306 | { |
2410d73a SM |
4307 | Lisp_Object overlay, hit_list; |
4308 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4309 | |
4310 | hit_list = Qnil; | |
c2d5b10f | 4311 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4312 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4313 | { |
4314 | int endpos; | |
2410d73a | 4315 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4316 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4317 | if (endpos < pos) | |
4318 | break; | |
4319 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4320 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4321 | hit_list = Fcons (overlay, hit_list); |
4322 | } | |
4323 | else | |
2410d73a | 4324 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4325 | { |
4326 | int startpos; | |
2410d73a | 4327 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4328 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4329 | if (startpos > pos) | |
4330 | break; | |
4331 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4332 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4333 | hit_list = Fcons (overlay, hit_list); |
4334 | } | |
7539e11f KR |
4335 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4336 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4337 | } |
173f2a64 | 4338 | \f |
54dfdeb0 | 4339 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4340 | in the slot with offset OFFSET. */ |
4341 | ||
0fa3ba92 | 4342 | void |
54dfdeb0 KH |
4343 | buffer_slot_type_mismatch (offset) |
4344 | int offset; | |
0fa3ba92 | 4345 | { |
54dfdeb0 | 4346 | Lisp_Object sym; |
0fa3ba92 | 4347 | char *type_name; |
177c0ea7 | 4348 | |
7313acd0 | 4349 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4350 | { |
7c02e886 GM |
4351 | case Lisp_Int: |
4352 | type_name = "integers"; | |
4353 | break; | |
177c0ea7 | 4354 | |
7c02e886 GM |
4355 | case Lisp_String: |
4356 | type_name = "strings"; | |
4357 | break; | |
177c0ea7 | 4358 | |
7c02e886 GM |
4359 | case Lisp_Symbol: |
4360 | type_name = "symbols"; | |
4361 | break; | |
177c0ea7 | 4362 | |
0fa3ba92 JB |
4363 | default: |
4364 | abort (); | |
4365 | } | |
4366 | ||
7313acd0 | 4367 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4368 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4369 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4370 | } |
7c02e886 | 4371 | |
0fa3ba92 | 4372 | \f |
b86af064 GM |
4373 | /*********************************************************************** |
4374 | Allocation with mmap | |
4375 | ***********************************************************************/ | |
4376 | ||
4377 | #ifdef USE_MMAP_FOR_BUFFERS | |
4378 | ||
4379 | #include <sys/types.h> | |
4380 | #include <sys/mman.h> | |
4381 | ||
4382 | #ifndef MAP_ANON | |
4383 | #ifdef MAP_ANONYMOUS | |
4384 | #define MAP_ANON MAP_ANONYMOUS | |
4385 | #else | |
4386 | #define MAP_ANON 0 | |
4387 | #endif | |
4388 | #endif | |
4389 | ||
09dfdf85 GM |
4390 | #ifndef MAP_FAILED |
4391 | #define MAP_FAILED ((void *) -1) | |
4392 | #endif | |
4393 | ||
b86af064 GM |
4394 | #include <stdio.h> |
4395 | #include <errno.h> | |
4396 | ||
4397 | #if MAP_ANON == 0 | |
4398 | #include <fcntl.h> | |
4399 | #endif | |
4400 | ||
4401 | #include "coding.h" | |
4402 | ||
4403 | ||
4404 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4405 | The current implementation lets the system select mapped | |
4406 | addresses; we're not using MAP_FIXED in general, except when | |
4407 | trying to enlarge regions. | |
4408 | ||
4409 | Each mapped region starts with a mmap_region structure, the user | |
4410 | area starts after that structure, aligned to MEM_ALIGN. | |
4411 | ||
4412 | +-----------------------+ | |
4413 | | struct mmap_info + | | |
4414 | | padding | | |
4415 | +-----------------------+ | |
4416 | | user data | | |
4417 | | | | |
4418 | | | | |
4419 | +-----------------------+ */ | |
4420 | ||
4421 | struct mmap_region | |
4422 | { | |
4423 | /* User-specified size. */ | |
4424 | size_t nbytes_specified; | |
177c0ea7 | 4425 | |
b86af064 GM |
4426 | /* Number of bytes mapped */ |
4427 | size_t nbytes_mapped; | |
4428 | ||
4429 | /* Pointer to the location holding the address of the memory | |
4430 | allocated with the mmap'd block. The variable actually points | |
4431 | after this structure. */ | |
4432 | POINTER_TYPE **var; | |
4433 | ||
4434 | /* Next and previous in list of all mmap'd regions. */ | |
4435 | struct mmap_region *next, *prev; | |
4436 | }; | |
4437 | ||
4438 | /* Doubly-linked list of mmap'd regions. */ | |
4439 | ||
4440 | static struct mmap_region *mmap_regions; | |
4441 | ||
4442 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4443 | /dev/zero will be opened on it. */ | |
4444 | ||
4445 | static int mmap_fd; | |
4446 | ||
4447 | /* Temporary storage for mmap_set_vars, see there. */ | |
4448 | ||
4449 | static struct mmap_region *mmap_regions_1; | |
4450 | static int mmap_fd_1; | |
4451 | ||
4452 | /* Page size on this system. */ | |
4453 | ||
4454 | static int mmap_page_size; | |
4455 | ||
4456 | /* 1 means mmap has been intialized. */ | |
4457 | ||
4458 | static int mmap_initialized_p; | |
4459 | ||
4460 | /* Value is X rounded up to the next multiple of N. */ | |
4461 | ||
4462 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4463 | ||
4464 | /* Size of mmap_region structure plus padding. */ | |
4465 | ||
4466 | #define MMAP_REGION_STRUCT_SIZE \ | |
4467 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4468 | ||
4469 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4470 | region, return a pointer to the start of the region. */ | |
4471 | ||
4472 | #define MMAP_REGION(P) \ | |
4473 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4474 | ||
4475 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4476 | to the start of the user-visible part of the region. */ | |
4477 | ||
4478 | #define MMAP_USER_AREA(P) \ | |
4479 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4480 | ||
4481 | #define MEM_ALIGN sizeof (double) | |
4482 | ||
7273faa1 DL |
4483 | /* Predicate returning true if part of the address range [START .. END] |
4484 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4485 | memory mapping. |
4486 | ||
4487 | Default is to conservativly assume the address range is occupied by | |
4488 | something else. This can be overridden by system configuration | |
4489 | files if system-specific means to determine this exists. */ | |
4490 | ||
4491 | #ifndef MMAP_ALLOCATED_P | |
4492 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4493 | #endif | |
4494 | ||
b86af064 GM |
4495 | /* Function prototypes. */ |
4496 | ||
4497 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4498 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4499 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4500 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4501 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4502 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4503 | static void mmap_init P_ ((void)); | |
4504 | ||
4505 | ||
4506 | /* Return a region overlapping address range START...END, or null if | |
4507 | none. END is not including, i.e. the last byte in the range | |
4508 | is at END - 1. */ | |
4509 | ||
4510 | static struct mmap_region * | |
4511 | mmap_find (start, end) | |
4512 | POINTER_TYPE *start, *end; | |
4513 | { | |
4514 | struct mmap_region *r; | |
4515 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4516 | |
b86af064 GM |
4517 | for (r = mmap_regions; r; r = r->next) |
4518 | { | |
4519 | char *rstart = (char *) r; | |
4520 | char *rend = rstart + r->nbytes_mapped; | |
4521 | ||
4522 | if (/* First byte of range, i.e. START, in this region? */ | |
4523 | (s >= rstart && s < rend) | |
4524 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4525 | || (e > rstart && e <= rend) | |
4526 | /* First byte of this region in the range? */ | |
4527 | || (rstart >= s && rstart < e) | |
4528 | /* Last byte of this region in the range? */ | |
4529 | || (rend > s && rend <= e)) | |
4530 | break; | |
4531 | } | |
4532 | ||
4533 | return r; | |
4534 | } | |
4535 | ||
4536 | ||
4537 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4538 | the region. Value is non-zero if successful. */ | |
4539 | ||
4540 | static int | |
4541 | mmap_free_1 (r) | |
4542 | struct mmap_region *r; | |
4543 | { | |
4544 | if (r->next) | |
4545 | r->next->prev = r->prev; | |
4546 | if (r->prev) | |
4547 | r->prev->next = r->next; | |
4548 | else | |
4549 | mmap_regions = r->next; | |
177c0ea7 | 4550 | |
1a15cca0 | 4551 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4552 | { |
4553 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4554 | return 0; | |
4555 | } | |
4556 | ||
4557 | return 1; | |
4558 | } | |
4559 | ||
4560 | ||
4561 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4562 | Value is non-zero if successful. */ | |
4563 | ||
4564 | static int | |
4565 | mmap_enlarge (r, npages) | |
4566 | struct mmap_region *r; | |
4567 | int npages; | |
4568 | { | |
4569 | char *region_end = (char *) r + r->nbytes_mapped; | |
4570 | size_t nbytes; | |
4571 | int success = 0; | |
4572 | ||
4573 | if (npages < 0) | |
4574 | { | |
4575 | /* Unmap pages at the end of the region. */ | |
4576 | nbytes = - npages * mmap_page_size; | |
4577 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4578 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4579 | else | |
4580 | { | |
4581 | r->nbytes_mapped -= nbytes; | |
4582 | success = 1; | |
4583 | } | |
4584 | } | |
4585 | else if (npages > 0) | |
4586 | { | |
b86af064 | 4587 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4588 | |
b86af064 GM |
4589 | /* Try to map additional pages at the end of the region. We |
4590 | cannot do this if the address range is already occupied by | |
4591 | something else because mmap deletes any previous mapping. | |
4592 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4593 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4594 | { |
4595 | POINTER_TYPE *p; | |
177c0ea7 | 4596 | |
b86af064 GM |
4597 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4598 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4599 | if (p == MAP_FAILED) | |
edaa9aed | 4600 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4601 | else if (p != (POINTER_TYPE *) region_end) |
4602 | { | |
4603 | /* Kernels are free to choose a different address. In | |
4604 | that case, unmap what we've mapped above; we have | |
4605 | no use for it. */ | |
4606 | if (munmap (p, nbytes) == -1) | |
4607 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4608 | } | |
4609 | else | |
4610 | { | |
4611 | r->nbytes_mapped += nbytes; | |
4612 | success = 1; | |
4613 | } | |
4614 | } | |
4615 | } | |
4616 | ||
4617 | return success; | |
4618 | } | |
4619 | ||
4620 | ||
4621 | /* Set or reset variables holding references to mapped regions. If | |
4622 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4623 | non-zero, set all variables to the start of the user-areas | |
4624 | of mapped regions. | |
4625 | ||
4626 | This function is called from Fdump_emacs to ensure that the dumped | |
4627 | Emacs doesn't contain references to memory that won't be mapped | |
4628 | when Emacs starts. */ | |
4629 | ||
4630 | void | |
4631 | mmap_set_vars (restore_p) | |
4632 | int restore_p; | |
4633 | { | |
4634 | struct mmap_region *r; | |
4635 | ||
4636 | if (restore_p) | |
4637 | { | |
4638 | mmap_regions = mmap_regions_1; | |
4639 | mmap_fd = mmap_fd_1; | |
4640 | for (r = mmap_regions; r; r = r->next) | |
4641 | *r->var = MMAP_USER_AREA (r); | |
4642 | } | |
4643 | else | |
4644 | { | |
4645 | for (r = mmap_regions; r; r = r->next) | |
4646 | *r->var = NULL; | |
4647 | mmap_regions_1 = mmap_regions; | |
4648 | mmap_regions = NULL; | |
4649 | mmap_fd_1 = mmap_fd; | |
4650 | mmap_fd = -1; | |
4651 | } | |
4652 | } | |
4653 | ||
4654 | ||
4655 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4656 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4657 | address of some variable which will use the data area. | |
4658 | ||
4659 | The allocation of 0 bytes is valid. | |
4660 | ||
4661 | If we can't allocate the necessary memory, set *VAR to null, and | |
4662 | return null. */ | |
4663 | ||
4664 | static POINTER_TYPE * | |
4665 | mmap_alloc (var, nbytes) | |
4666 | POINTER_TYPE **var; | |
4667 | size_t nbytes; | |
4668 | { | |
4669 | void *p; | |
4670 | size_t map; | |
4671 | ||
4672 | mmap_init (); | |
4673 | ||
4674 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4675 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4676 | mmap_fd, 0); | |
177c0ea7 | 4677 | |
b86af064 GM |
4678 | if (p == MAP_FAILED) |
4679 | { | |
4680 | if (errno != ENOMEM) | |
4681 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4682 | p = NULL; | |
4683 | } | |
4684 | else | |
4685 | { | |
4686 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4687 | |
b86af064 GM |
4688 | r->nbytes_specified = nbytes; |
4689 | r->nbytes_mapped = map; | |
4690 | r->var = var; | |
4691 | r->prev = NULL; | |
4692 | r->next = mmap_regions; | |
4693 | if (r->next) | |
4694 | r->next->prev = r; | |
4695 | mmap_regions = r; | |
177c0ea7 | 4696 | |
b86af064 GM |
4697 | p = MMAP_USER_AREA (p); |
4698 | } | |
177c0ea7 | 4699 | |
b86af064 GM |
4700 | return *var = p; |
4701 | } | |
4702 | ||
4703 | ||
4704 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4705 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4706 | and return this value. If more memory cannot be allocated, then | |
4707 | leave *VAR unchanged, and return null. */ | |
4708 | ||
4709 | static POINTER_TYPE * | |
4710 | mmap_realloc (var, nbytes) | |
4711 | POINTER_TYPE **var; | |
4712 | size_t nbytes; | |
4713 | { | |
4714 | POINTER_TYPE *result; | |
177c0ea7 | 4715 | |
b86af064 GM |
4716 | mmap_init (); |
4717 | ||
4718 | if (*var == NULL) | |
4719 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4720 | else if (nbytes == 0) |
b86af064 GM |
4721 | { |
4722 | mmap_free (var); | |
4723 | result = mmap_alloc (var, nbytes); | |
4724 | } | |
4725 | else | |
4726 | { | |
4727 | struct mmap_region *r = MMAP_REGION (*var); | |
4728 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4729 | |
b86af064 GM |
4730 | if (room < nbytes) |
4731 | { | |
4732 | /* Must enlarge. */ | |
4733 | POINTER_TYPE *old_ptr = *var; | |
4734 | ||
4735 | /* Try to map additional pages at the end of the region. | |
4736 | If that fails, allocate a new region, copy data | |
4737 | from the old region, then free it. */ | |
4738 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4739 | / mmap_page_size))) | |
4740 | { | |
4741 | r->nbytes_specified = nbytes; | |
4742 | *var = result = old_ptr; | |
4743 | } | |
4744 | else if (mmap_alloc (var, nbytes)) | |
4745 | { | |
4746 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4747 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4748 | result = *var; | |
4749 | r = MMAP_REGION (result); | |
4750 | r->nbytes_specified = nbytes; | |
4751 | } | |
4752 | else | |
4753 | { | |
4754 | *var = old_ptr; | |
4755 | result = NULL; | |
4756 | } | |
4757 | } | |
4758 | else if (room - nbytes >= mmap_page_size) | |
4759 | { | |
4760 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4761 | memory back to the system. |
4762 | ||
4763 | The extra parens are to make the division happens first, | |
4764 | on positive values, so we know it will round towards | |
4765 | zero. */ | |
bb63c5c9 | 4766 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4767 | result = *var; |
4768 | r->nbytes_specified = nbytes; | |
4769 | } | |
4770 | else | |
4771 | { | |
4772 | /* Leave it alone. */ | |
4773 | result = *var; | |
4774 | r->nbytes_specified = nbytes; | |
4775 | } | |
4776 | } | |
4777 | ||
4778 | return result; | |
4779 | } | |
4780 | ||
4781 | ||
4782 | /* Free a block of relocatable storage whose data is pointed to by | |
4783 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4784 | ||
4785 | static void | |
4786 | mmap_free (var) | |
4787 | POINTER_TYPE **var; | |
4788 | { | |
4789 | mmap_init (); | |
177c0ea7 | 4790 | |
b86af064 GM |
4791 | if (*var) |
4792 | { | |
4793 | mmap_free_1 (MMAP_REGION (*var)); | |
4794 | *var = NULL; | |
4795 | } | |
4796 | } | |
4797 | ||
4798 | ||
4799 | /* Perform necessary intializations for the use of mmap. */ | |
4800 | ||
4801 | static void | |
4802 | mmap_init () | |
4803 | { | |
4804 | #if MAP_ANON == 0 | |
4805 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4806 | in a dumped Emacs. */ | |
4807 | if (mmap_fd <= 0) | |
4808 | { | |
4809 | /* No anonymous mmap -- we need the file descriptor. */ | |
4810 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4811 | if (mmap_fd == -1) | |
4812 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4813 | } | |
4814 | #endif /* MAP_ANON == 0 */ | |
4815 | ||
4816 | if (mmap_initialized_p) | |
4817 | return; | |
4818 | mmap_initialized_p = 1; | |
177c0ea7 | 4819 | |
b86af064 GM |
4820 | #if MAP_ANON != 0 |
4821 | mmap_fd = -1; | |
4822 | #endif | |
177c0ea7 | 4823 | |
b86af064 GM |
4824 | mmap_page_size = getpagesize (); |
4825 | } | |
4826 | ||
4827 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4828 | ||
4829 | ||
4830 | \f | |
4831 | /*********************************************************************** | |
4832 | Buffer-text Allocation | |
4833 | ***********************************************************************/ | |
4834 | ||
4835 | #ifdef REL_ALLOC | |
4836 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4837 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4838 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4839 | #endif /* REL_ALLOC */ | |
4840 | ||
4841 | ||
4842 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4843 | ||
4844 | static void | |
4845 | alloc_buffer_text (b, nbytes) | |
4846 | struct buffer *b; | |
4847 | size_t nbytes; | |
4848 | { | |
4849 | POINTER_TYPE *p; | |
177c0ea7 | 4850 | |
b86af064 GM |
4851 | BLOCK_INPUT; |
4852 | #if defined USE_MMAP_FOR_BUFFERS | |
4853 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4854 | #elif defined REL_ALLOC | |
4855 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4856 | #else | |
815add84 | 4857 | p = xmalloc (nbytes); |
b86af064 | 4858 | #endif |
177c0ea7 | 4859 | |
b86af064 GM |
4860 | if (p == NULL) |
4861 | { | |
4862 | UNBLOCK_INPUT; | |
4863 | memory_full (); | |
4864 | } | |
4865 | ||
4866 | b->text->beg = (unsigned char *) p; | |
4867 | UNBLOCK_INPUT; | |
4868 | } | |
4869 | ||
4870 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4871 | shrink it. */ | |
4872 | ||
4873 | void | |
4874 | enlarge_buffer_text (b, delta) | |
4875 | struct buffer *b; | |
4876 | int delta; | |
4877 | { | |
4878 | POINTER_TYPE *p; | |
4879 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4880 | + delta); | |
4881 | BLOCK_INPUT; | |
4882 | #if defined USE_MMAP_FOR_BUFFERS | |
4883 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4884 | #elif defined REL_ALLOC | |
4885 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4886 | #else | |
4887 | p = xrealloc (b->text->beg, nbytes); | |
4888 | #endif | |
177c0ea7 | 4889 | |
b86af064 GM |
4890 | if (p == NULL) |
4891 | { | |
4892 | UNBLOCK_INPUT; | |
4893 | memory_full (); | |
4894 | } | |
4895 | ||
4896 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4897 | UNBLOCK_INPUT; | |
4898 | } | |
4899 | ||
4900 | ||
4901 | /* Free buffer B's text buffer. */ | |
4902 | ||
4903 | static void | |
4904 | free_buffer_text (b) | |
4905 | struct buffer *b; | |
4906 | { | |
4907 | BLOCK_INPUT; | |
4908 | ||
4909 | #if defined USE_MMAP_FOR_BUFFERS | |
4910 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4911 | #elif defined REL_ALLOC | |
4912 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4913 | #else | |
4914 | xfree (b->text->beg); | |
4915 | #endif | |
177c0ea7 | 4916 | |
b86af064 GM |
4917 | BUF_BEG_ADDR (b) = NULL; |
4918 | UNBLOCK_INPUT; | |
4919 | } | |
4920 | ||
4921 | ||
4922 | \f | |
4923 | /*********************************************************************** | |
4924 | Initialization | |
4925 | ***********************************************************************/ | |
4926 | ||
dfcf069d | 4927 | void |
1ab256cb RM |
4928 | init_buffer_once () |
4929 | { | |
7c02e886 GM |
4930 | int idx; |
4931 | ||
4932 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4933 | |
1ab256cb RM |
4934 | /* Make sure all markable slots in buffer_defaults |
4935 | are initialized reasonably, so mark_buffer won't choke. */ | |
4936 | reset_buffer (&buffer_defaults); | |
13de9290 | 4937 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4938 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4939 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4940 | /* Prevent GC from getting confused. */ |
4941 | buffer_defaults.text = &buffer_defaults.own_text; | |
4942 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4943 | BUF_INTERVALS (&buffer_defaults) = 0; |
4944 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4945 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4946 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4947 | |
4948 | /* Set up the default values of various buffer slots. */ | |
4949 | /* Must do these before making the first buffer! */ | |
4950 | ||
f532dca0 | 4951 | /* real setup is done in bindings.el */ |
1ab256cb | 4952 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4953 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4954 | buffer_defaults.abbrev_mode = Qnil; |
4955 | buffer_defaults.overwrite_mode = Qnil; | |
4956 | buffer_defaults.case_fold_search = Qt; | |
4957 | buffer_defaults.auto_fill_function = Qnil; | |
4958 | buffer_defaults.selective_display = Qnil; | |
4959 | #ifndef old | |
4960 | buffer_defaults.selective_display_ellipses = Qt; | |
4961 | #endif | |
4962 | buffer_defaults.abbrev_table = Qnil; | |
4963 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4964 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4965 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4966 | buffer_defaults.file_format = Qnil; |
71ed49fa | 4967 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
4968 | buffer_defaults.overlays_before = NULL; |
4969 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4970 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4971 | |
8d7a4592 | 4972 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4973 | buffer_defaults.truncate_lines = Qnil; |
4974 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4975 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4976 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 4977 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 4978 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 4979 | |
f7975d07 | 4980 | #ifdef DOS_NT |
0776cb1b | 4981 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 4982 | #endif |
a1a17b61 | 4983 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 4984 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
4985 | XSETFASTINT (buffer_defaults.fill_column, 70); |
4986 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 4987 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 4988 | buffer_defaults.file_truename = Qnil; |
7962a441 | 4989 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
4990 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
4991 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
4992 | buffer_defaults.left_fringe_width = Qnil; | |
4993 | buffer_defaults.right_fringe_width = Qnil; | |
4994 | buffer_defaults.fringes_outside_margins = Qnil; | |
4995 | buffer_defaults.scroll_bar_width = Qnil; | |
4996 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 4997 | buffer_defaults.indicate_empty_lines = Qnil; |
8e8767f8 | 4998 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
0552666b GM |
4999 | buffer_defaults.scroll_up_aggressively = Qnil; |
5000 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5001 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5002 | |
5003 | /* Assign the local-flags to the slots that have default values. | |
5004 | The local flag is a bit that is used in the buffer | |
5005 | to say that it has its own local value for the slot. | |
5006 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5007 | ||
5008 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5009 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5010 | |
5011 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5012 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5013 | XSETINT (buffer_local_flags.filename, -1); |
5014 | XSETINT (buffer_local_flags.directory, -1); | |
5015 | XSETINT (buffer_local_flags.backed_up, -1); | |
5016 | XSETINT (buffer_local_flags.save_length, -1); | |
5017 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5018 | XSETINT (buffer_local_flags.read_only, -1); | |
5019 | XSETINT (buffer_local_flags.major_mode, -1); | |
5020 | XSETINT (buffer_local_flags.mode_name, -1); | |
5021 | XSETINT (buffer_local_flags.undo_list, -1); | |
5022 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5023 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5024 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5025 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5026 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5027 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5028 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5029 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5030 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5031 | |
7c02e886 GM |
5032 | idx = 1; |
5033 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5034 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5035 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5036 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5037 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5038 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5039 | #ifndef old |
7c02e886 | 5040 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5041 | #endif |
7c02e886 GM |
5042 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5043 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5044 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5045 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5046 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5047 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5048 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5049 | #ifdef DOS_NT |
7c02e886 | 5050 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5051 | /* Make this one a permanent local. */ |
7c02e886 | 5052 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5053 | #endif |
7c02e886 GM |
5054 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5055 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5056 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5057 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5058 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5059 | /* Make this one a permanent local. */ |
7c02e886 | 5060 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5061 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5062 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5063 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5064 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5065 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5066 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5067 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5068 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
8e8767f8 | 5069 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
7c02e886 GM |
5070 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5071 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5072 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5073 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5074 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5075 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5076 | |
5077 | /* Need more room? */ | |
7313acd0 | 5078 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5079 | abort (); |
7313acd0 | 5080 | last_per_buffer_idx = idx; |
177c0ea7 | 5081 | |
1ab256cb RM |
5082 | Vbuffer_alist = Qnil; |
5083 | current_buffer = 0; | |
5084 | all_buffers = 0; | |
5085 | ||
5086 | QSFundamental = build_string ("Fundamental"); | |
5087 | ||
5088 | Qfundamental_mode = intern ("fundamental-mode"); | |
5089 | buffer_defaults.major_mode = Qfundamental_mode; | |
5090 | ||
5091 | Qmode_class = intern ("mode-class"); | |
5092 | ||
5093 | Qprotected_field = intern ("protected-field"); | |
5094 | ||
5095 | Qpermanent_local = intern ("permanent-local"); | |
5096 | ||
5097 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5098 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5099 | |
48265e61 DL |
5100 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5101 | ||
1ab256cb | 5102 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5103 | |
1ab256cb RM |
5104 | /* super-magic invisible buffer */ |
5105 | Vbuffer_alist = Qnil; | |
5106 | ||
ffd56f97 | 5107 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5108 | |
5109 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5110 | } |
5111 | ||
dfcf069d | 5112 | void |
1ab256cb RM |
5113 | init_buffer () |
5114 | { | |
93c27ef1 | 5115 | char buf[MAXPATHLEN + 1]; |
2381d133 JB |
5116 | char *pwd; |
5117 | struct stat dotstat, pwdstat; | |
136351b7 | 5118 | Lisp_Object temp; |
f7975d07 | 5119 | int rc; |
1ab256cb | 5120 | |
b86af064 | 5121 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5122 | { |
5123 | /* When using the ralloc implementation based on mmap(2), buffer | |
5124 | text pointers will have been set to null in the dumped Emacs. | |
5125 | Map new memory. */ | |
5126 | struct buffer *b; | |
177c0ea7 | 5127 | |
93c27ef1 GM |
5128 | for (b = all_buffers; b; b = b->next) |
5129 | if (b->text->beg == NULL) | |
b86af064 | 5130 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5131 | } |
b86af064 | 5132 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5133 | |
1ab256cb | 5134 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5135 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5136 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5137 | |
314dbe9a PE |
5138 | /* If PWD is accurate, use it instead of calling getwd. PWD is |
5139 | sometimes a nicer name, and using it may avoid a fatal error if a | |
5140 | parent directory is searchable but not readable. */ | |
309f2a6e RS |
5141 | if ((pwd = getenv ("PWD")) != 0 |
5142 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
5143 | && stat (pwd, &pwdstat) == 0 |
5144 | && stat (".", &dotstat) == 0 | |
5145 | && dotstat.st_ino == pwdstat.st_ino | |
5146 | && dotstat.st_dev == pwdstat.st_dev | |
5147 | && strlen (pwd) < MAXPATHLEN) | |
5148 | strcpy (buf, pwd); | |
6335beb0 RS |
5149 | #ifdef HAVE_GETCWD |
5150 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 5151 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 5152 | #else |
2381d133 | 5153 | else if (getwd (buf) == 0) |
cf1e6391 | 5154 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 5155 | #endif |
1ab256cb RM |
5156 | |
5157 | #ifndef VMS | |
5158 | /* Maybe this should really use some standard subroutine | |
5159 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
5160 | rc = strlen (buf); |
5161 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
5162 | { | |
5163 | buf[rc] = DIRECTORY_SEP; | |
5164 | buf[rc + 1] = '\0'; | |
5165 | } | |
1ab256cb | 5166 | #endif /* not VMS */ |
0995fa35 | 5167 | |
dcd74c5f KH |
5168 | current_buffer->directory = make_unibyte_string (buf, strlen (buf)); |
5169 | if (! NILP (buffer_defaults.enable_multibyte_characters)) | |
5170 | /* At this momemnt, we still don't know how to decode the | |
5171 | direcotry name. So, we keep the bytes in multibyte form so | |
5172 | that ENCODE_FILE correctly gets the original bytes. */ | |
5173 | current_buffer->directory | |
5174 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5175 | |
0995fa35 RS |
5176 | /* Add /: to the front of the name |
5177 | if it would otherwise be treated as magic. */ | |
5178 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5179 | if (! NILP (temp) |
5180 | /* If the default dir is just /, TEMP is non-nil | |
5181 | because of the ange-ftp completion handler. | |
5182 | However, it is not necessary to turn / into /:/. | |
5183 | So avoid doing that. */ | |
d5db4077 | 5184 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5185 | current_buffer->directory |
5186 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5187 | ||
136351b7 RS |
5188 | temp = get_minibuffer (0); |
5189 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
5190 | } |
5191 | ||
5192 | /* initialize the buffer routines */ | |
dfcf069d | 5193 | void |
1ab256cb RM |
5194 | syms_of_buffer () |
5195 | { | |
9115729e KH |
5196 | staticpro (&last_overlay_modification_hooks); |
5197 | last_overlay_modification_hooks | |
5198 | = Fmake_vector (make_number (10), Qnil); | |
5199 | ||
1ab256cb RM |
5200 | staticpro (&Vbuffer_defaults); |
5201 | staticpro (&Vbuffer_local_symbols); | |
5202 | staticpro (&Qfundamental_mode); | |
5203 | staticpro (&Qmode_class); | |
5204 | staticpro (&QSFundamental); | |
5205 | staticpro (&Vbuffer_alist); | |
5206 | staticpro (&Qprotected_field); | |
5207 | staticpro (&Qpermanent_local); | |
5208 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5209 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5210 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5211 | Qevaporate = intern ("evaporate"); |
5212 | staticpro (&Qevaporate); | |
294d215f | 5213 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5214 | staticpro (&Qmodification_hooks); |
294d215f | 5215 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5216 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5217 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5218 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5219 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5220 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5221 | Qpriority = intern ("priority"); |
5222 | staticpro (&Qpriority); | |
5223 | Qwindow = intern ("window"); | |
5224 | staticpro (&Qwindow); | |
bbbe9545 KH |
5225 | Qbefore_string = intern ("before-string"); |
5226 | staticpro (&Qbefore_string); | |
5227 | Qafter_string = intern ("after-string"); | |
5228 | staticpro (&Qafter_string); | |
22378665 RS |
5229 | Qfirst_change_hook = intern ("first-change-hook"); |
5230 | staticpro (&Qfirst_change_hook); | |
5231 | Qbefore_change_functions = intern ("before-change-functions"); | |
5232 | staticpro (&Qbefore_change_functions); | |
5233 | Qafter_change_functions = intern ("after-change-functions"); | |
5234 | staticpro (&Qafter_change_functions); | |
48265e61 | 5235 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5236 | |
5b20caf0 RS |
5237 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5238 | staticpro (&Qkill_buffer_query_functions); | |
5239 | ||
1ab256cb RM |
5240 | Fput (Qprotected_field, Qerror_conditions, |
5241 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5242 | Fput (Qprotected_field, Qerror_message, | |
5243 | build_string ("Attempt to modify a protected field")); | |
5244 | ||
5245 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5246 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5247 | ||
5248 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5249 | &buffer_defaults.mode_line_format, |
5250 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5251 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5252 | |
045dee35 | 5253 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5254 | &buffer_defaults.header_line_format, |
5255 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5256 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5257 | |
7ee72033 MB |
5258 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5259 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5260 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5261 | |
a3bbced0 | 5262 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5263 | &buffer_defaults.extra_line_spacing, |
5264 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5265 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5266 | |
187ccf49 KS |
5267 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5268 | &buffer_defaults.cursor_in_non_selected_windows, | |
5269 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5270 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5271 | ||
1ab256cb | 5272 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5273 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5274 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5275 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5276 | |
5277 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5278 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5279 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5280 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5281 | |
5e2ad10b JB |
5282 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5283 | &buffer_defaults.direction_reversed, | |
5284 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5285 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5286 | |
5e2ad10b JB |
5287 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5288 | &buffer_defaults.enable_multibyte_characters, | |
5289 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5290 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5291 | |
5e2ad10b JB |
5292 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5293 | &buffer_defaults.buffer_file_coding_system, | |
5294 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5295 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5296 | |
1ab256cb | 5297 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5298 | &buffer_defaults.truncate_lines, |
5299 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5300 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5301 | |
5302 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5303 | &buffer_defaults.fill_column, |
5304 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5305 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5306 | |
5307 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5308 | &buffer_defaults.left_margin, |
5309 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5310 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5311 | |
5312 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
7ee72033 MB |
5313 | &buffer_defaults.tab_width, |
5314 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5315 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5316 | |
5317 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5318 | &buffer_defaults.case_fold_search, |
5319 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5320 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5321 | |
f7975d07 | 5322 | #ifdef DOS_NT |
177c0ea7 | 5323 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5324 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5325 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5326 | This is the same as (default-value 'buffer-file-type). |
5327 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5328 | #endif |
5329 | ||
0552666b | 5330 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5331 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5332 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5333 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5334 | |
5335 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5336 | &buffer_defaults.right_margin_cols, |
5337 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5338 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5339 | |
2ad8731a KS |
5340 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5341 | &buffer_defaults.left_fringe_width, | |
5342 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5343 | This is the same as (default-value 'left-fringe-width). */); | |
5344 | ||
5345 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5346 | &buffer_defaults.right_fringe_width, | |
5347 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5348 | This is the same as (default-value 'right-fringe-width). */); | |
5349 | ||
5350 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5351 | &buffer_defaults.fringes_outside_margins, | |
5352 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5353 | This is the same as (default-value 'fringes-outside-margins). */); | |
5354 | ||
5355 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5356 | &buffer_defaults.scroll_bar_width, | |
5357 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5358 | This is the same as (default-value 'scroll-bar-width). */); | |
5359 | ||
5360 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5361 | &buffer_defaults.vertical_scroll_bar_type, | |
5362 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5363 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5364 | ||
0552666b | 5365 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5366 | &buffer_defaults.indicate_empty_lines, |
5367 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5368 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5369 | |
8e8767f8 KS |
5370 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5371 | &buffer_defaults.indicate_buffer_boundaries, | |
5372 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5373 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5374 | ||
0552666b | 5375 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5376 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5377 | doc: /* Default value of `scroll-up-aggressively'. |
5378 | This value applies in buffers that don't have their own local values. | |
5379 | This variable is an alias for (default-value 'scroll-up-aggressively). */); | |
177c0ea7 | 5380 | |
0552666b | 5381 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5382 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5383 | doc: /* Default value of `scroll-down-aggressively'. |
5384 | This value applies in buffers that don't have their own local values. | |
5385 | This variable is an alias for (default-value 'scroll-down-aggressively). */); | |
177c0ea7 | 5386 | |
045dee35 | 5387 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5388 | ¤t_buffer->header_line_format, |
7ee72033 | 5389 | Qnil, |
7614d762 RS |
5390 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5391 | The header line appears, optionally, at the top of a window; | |
5392 | the mode line appears at the bottom. */); | |
177c0ea7 | 5393 | |
1ab256cb | 5394 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5395 | Qnil, |
5396 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5397 | Each buffer has its own value of this variable. |
5398 | Value may be nil, a string, a symbol or a list or cons cell. | |
5399 | A value of nil means don't display a mode line. | |
5400 | For a symbol, its value is used (but it is ignored if t or nil). | |
5401 | A string appearing directly as the value of a symbol is processed verbatim | |
5402 | in that the %-constructs below are not recognized. | |
ed463255 | 5403 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5404 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5405 | in the value of that symbol will be ignored. |
018ba359 | 5406 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5407 | is used as a mode line element. Be careful--FORM should not load any files, |
5408 | because that can cause an infinite recursion. | |
ed463255 KS |
5409 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5410 | with the specified properties PROPS applied. | |
018ba359 PJ |
5411 | For a list whose car is a symbol, the symbol's value is taken, |
5412 | and if that is non-nil, the cadr of the list is processed recursively. | |
5413 | Otherwise, the caddr of the list (if there is one) is processed. | |
5414 | For a list whose car is a string or list, each element is processed | |
5415 | recursively and the results are effectively concatenated. | |
5416 | For a list whose car is an integer, the cdr of the list is processed | |
5417 | and padded (if the number is positive) or truncated (if negative) | |
5418 | to the width specified by that number. | |
5419 | A string is printed verbatim in the mode line except for %-constructs: | |
5420 | (%-constructs are allowed when the string is the entire mode-line-format | |
5421 | or when it is found in a cons-cell or a list) | |
5422 | %b -- print buffer name. %f -- print visited file name. | |
5423 | %F -- print frame name. | |
5424 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5425 | %& is like %*, but ignore read-only-ness. | |
5426 | % means buffer is read-only and * means it is modified. | |
5427 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5428 | %s -- print process status. %l -- print the current line number. | |
5429 | %c -- print the current column number (this makes editing slower). | |
5430 | To make the column number update correctly in all cases, | |
5431 | `column-number-mode' must be non-nil. | |
77d31fb4 LK |
5432 | %i -- print the size of the buffer. |
5433 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5434 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5435 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5436 | or print Bottom or All. | |
5437 | %m -- print the mode name. | |
5438 | %n -- print Narrow if appropriate. | |
5439 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems. | |
5440 | %Z -- like %z, but including the end-of-line format. | |
5441 | %[ -- print one [ for each recursive editing level. %] similar. | |
5442 | %% -- print %. %- -- print infinitely many dashes. | |
5443 | Decimal digits after the % specify field width to which to pad. */); | |
5444 | ||
7ee72033 | 5445 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5446 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
557ca2c1 RS |
5447 | nil here means use current buffer's major mode, provided it is not |
5448 | marked as "special". | |
5449 | ||
5450 | When a mode is used by default, `find-file' switches to it | |
5451 | before it reads the contents into the buffer and before | |
5452 | it finishes setting up the buffer. Thus, the mode and | |
5453 | its hooks should not expect certain variables such as | |
5454 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5455 | |
5456 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5457 | make_number (Lisp_Symbol), |
efc7e75f | 5458 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5459 | |
5460 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5461 | Qnil, |
efc7e75f | 5462 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5463 | |
7ee72033 | 5464 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5465 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5466 | |
5467 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5468 | Qnil, |
efc7e75f | 5469 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5470 | |
5471 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5472 | make_number (Lisp_Int), |
1ac5826d | 5473 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5474 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5475 | |
5476 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5477 | make_number (Lisp_Int), |
efc7e75f | 5478 | doc: /* *Column for the default indent-line-function to indent to. |
018ba359 | 5479 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5480 | |
5481 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5482 | make_number (Lisp_Int), |
efc7e75f | 5483 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5484 | |
7ee72033 | 5485 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5486 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5487 | A value of nil means use backslash and octal digits. |
5488 | This variable does not apply to characters whose display is specified | |
5489 | in the current display table (if there is one). */); | |
1ab256cb | 5490 | |
3b06f880 | 5491 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5492 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5493 | Qnil, |
efc7e75f | 5494 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5495 | Otherwise they are regarded as unibyte. This affects the display, |
5496 | file I/O and the behavior of various editing commands. | |
5497 | ||
5498 | This variable is buffer-local but you cannot set it directly; | |
5499 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5500 | Changing its default value with `setq-default' is supported. | |
5501 | See also variable `default-enable-multibyte-characters' and Info node | |
5502 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5503 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5504 | |
c71b5d9b | 5505 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5506 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5507 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5508 | This variable applies to saving the buffer, and also to `write-region' |
5509 | and other functions that use `write-region'. | |
5510 | It does not apply to sending output to subprocesses, however. | |
5511 | ||
5512 | If this is nil, the buffer is saved without any code conversion | |
5513 | unless some coding system is specified in `file-coding-system-alist' | |
5514 | for the buffer file. | |
5515 | ||
31a6cb06 EZ |
5516 | If the text to be saved cannot be encoded as specified by this variable, |
5517 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5518 | ||
018ba359 PJ |
5519 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5520 | ||
5521 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5522 | |
3b06f880 | 5523 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5524 | Qnil, |
efc7e75f | 5525 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5526 | |
7ee72033 | 5527 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5528 | doc: /* *Non-nil means do not display continuation lines. |
5529 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5530 | |
5531 | Note that this is overridden by the variable | |
5532 | `truncate-partial-width-windows' if that variable is non-nil | |
5533 | and this buffer is not full-frame width. */); | |
1ab256cb | 5534 | |
f7975d07 | 5535 | #ifdef DOS_NT |
54ad07d3 | 5536 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5537 | Qnil, |
efc7e75f | 5538 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5539 | This variable is meaningful on MS-DOG and Windows NT. |
5540 | On those systems, it is automatically local in every buffer. | |
5541 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5542 | #endif |
5543 | ||
1ab256cb | 5544 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5545 | make_number (Lisp_String), |
efc7e75f | 5546 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5547 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5548 | |
5549 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5550 | Qnil, |
efc7e75f | 5551 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5552 | It is called after self-inserting any character specified in |
5553 | the `auto-fill-chars' table. | |
5554 | NOTE: This variable is not a hook; | |
5555 | its value may not be a list of functions. */); | |
1ab256cb RM |
5556 | |
5557 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5558 | make_number (Lisp_String), |
efc7e75f | 5559 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5560 | |
f6ed2e84 | 5561 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5562 | make_number (Lisp_String), |
efc7e75f | 5563 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5564 | The truename of a file is calculated by `file-truename' |
5565 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5566 | |
1ab256cb | 5567 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5568 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5569 | make_number (Lisp_String), |
7614d762 RS |
5570 | doc: /* Name of file for auto-saving current buffer. |
5571 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5572 | |
7ee72033 | 5573 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5574 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5575 | |
7ee72033 | 5576 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5577 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5578 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5579 | |
5580 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5581 | make_number (Lisp_Int), |
efc7e75f | 5582 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5583 | 0 initially. */); |
1ab256cb RM |
5584 | |
5585 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5586 | Qnil, |
7614d762 RS |
5587 | doc: /* Non-nil enables selective display. |
5588 | An Integer N as value means display only lines | |
5589 | that start with less than n columns of space. | |
5590 | A value of t means that the character ^M makes itself and | |
5591 | all the rest of the line invisible; also, when saving the buffer | |
5592 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5593 | |
5594 | #ifndef old | |
5595 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5596 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5597 | Qnil, |
3f676284 | 5598 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5599 | #endif |
5600 | ||
7ee72033 | 5601 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5602 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5603 | The value should be one of `overwrite-mode-textual', |
5604 | `overwrite-mode-binary', or nil. | |
5605 | If it is `overwrite-mode-textual', self-insertion still | |
5606 | inserts at the end of a line, and inserts when point is before a tab, | |
5607 | until the tab is filled in. | |
5608 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5609 | ||
54939090 | 5610 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5611 | Qnil, |
efc7e75f | 5612 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5613 | |
5614 | If this variable is nil, the value of `standard-display-table' is used. | |
5615 | Each window can have its own, overriding display table, see | |
5616 | `set-window-display-table' and `window-display-table'. | |
5617 | ||
5618 | The display table is a char-table created with `make-display-table'. | |
5619 | A char-table is an array indexed by character codes. Normal array | |
5620 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5621 | ||
5622 | Each of the char-table elements control how to display the corresponding | |
5623 | text character: the element at index C in the table says how to display | |
5624 | the character whose code is C. Each element should be a vector of | |
5625 | characters or nil. nil means display the character in the default fashion; | |
5626 | otherwise, the characters from the vector are delivered to the screen | |
5627 | instead of the original character. | |
5628 | ||
5629 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display | |
5630 | a capital Y instead of each X character. | |
5631 | ||
5632 | In addition, a char-table has six extra slots to control the display of: | |
5633 | ||
5634 | the end of a truncated screen line (extra-slot 0, a single character); | |
5635 | the end of a continued line (extra-slot 1, a single character); | |
5636 | the escape character used to display character codes in octal | |
5637 | (extra-slot 2, a single character); | |
5638 | the character used as an arrow for control characters (extra-slot 3, | |
5639 | a single character); | |
5640 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5641 | a vector of characters); | |
5642 | the character used to draw the border between side-by-side windows | |
5643 | (extra-slot 5, a single character). | |
5644 | ||
5645 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5646 | |
2ad8731a | 5647 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5648 | Qnil, |
efc7e75f | 5649 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5650 | A value of nil means no marginal area. */); |
177c0ea7 | 5651 | |
2ad8731a | 5652 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5653 | Qnil, |
efc7e75f | 5654 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5655 | A value of nil means no marginal area. */); |
177c0ea7 | 5656 | |
2ad8731a KS |
5657 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5658 | Qnil, | |
5659 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5660 | A value of 0 means no left fringe is shown in this buffer's window. | |
5661 | A value of nil means to use the left fringe width from the window's frame. */); | |
5662 | ||
5663 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5664 | Qnil, | |
5665 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5666 | A value of 0 means no right fringe is shown in this buffer's window. | |
5667 | A value of nil means to use the right fringe width from the window's frame. */); | |
5668 | ||
5669 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5670 | Qnil, | |
5671 | doc: /* *Non-nil means to display fringes outside display margins. | |
5672 | A value of nil means to display fringes between margins and buffer text. */); | |
5673 | ||
5674 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5675 | Qnil, | |
5676 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5677 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5678 | ||
5679 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5680 | Qnil, | |
5681 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5682 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5683 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5684 | |
fc2c8887 RS |
5685 | A value of `left' or `right' means put the vertical scroll bar at that side |
5686 | of the window; a value of nil means don't show any vertical scroll bars. | |
5687 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5688 | |
0552666b | 5689 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5690 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5691 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5692 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5693 | window-systems. */); | |
177c0ea7 | 5694 | |
8e8767f8 KS |
5695 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5696 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5697 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
ccbc4331 KS |
5698 | If non-nil, the first and last line of the buffer are marked in the fringe |
5699 | of a window on window-systems with angle bitmaps, or if the window can be | |
5700 | scrolled, the top and bottom line of the window are marked with up and down | |
5701 | arrow bitmaps. | |
b2229037 KS |
5702 | |
5703 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5704 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5705 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5706 | the left fringe but no arrows. |
b2229037 | 5707 | |
79e3497d RS |
5708 | You can exercise more precise control by using an alist as the |
5709 | value. Each alist element (INDICATOR . POSITION) specifies | |
5710 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5711 | `bottom', `up', `down', or t, which specifies the default position, |
5712 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5713 | this indicator. | |
5714 | ||
5715 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5716 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
ccbc4331 | 5717 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5718 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
8e8767f8 | 5719 | |
0552666b | 5720 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5721 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5722 | doc: /* How far to scroll windows upward. |
5723 | If you move point off the bottom, the window scrolls automatically. | |
5724 | This variable controls how far it scrolls. nil, the default, | |
5725 | means scroll to center point. A fraction means scroll to put point | |
5726 | that fraction of the window's height from the bottom of the window. | |
5727 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5728 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5729 | point goes at the top, so that in that simple case, the window | |
5730 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5731 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5732 | |
0552666b | 5733 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5734 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5735 | doc: /* How far to scroll windows downward. |
5736 | If you move point off the top, the window scrolls automatically. | |
5737 | This variable controls how far it scrolls. nil, the default, | |
5738 | means scroll to center point. A fraction means scroll to put point | |
5739 | that fraction of the window's height from the top of the window. | |
5740 | When the value is 0.0, point goes at the top line, which in the simple | |
5741 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5742 | point goes at the bottom, so that in that simple case, the window | |
5743 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5744 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5745 | |
1ab256cb RM |
5746 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5747 | "Don't ask."); | |
5748 | */ | |
1ab256cb | 5749 | |
7ee72033 MB |
5750 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5751 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5752 | Two arguments are passed to each function: the positions of |
5753 | the beginning and end of the range of old text to be changed. | |
5754 | \(For an insertion, the beginning and end are at the same place.) | |
5755 | No information is given about the length of the text after the change. | |
5756 | ||
5757 | Buffer changes made while executing the `before-change-functions' | |
5758 | don't call any before-change or after-change functions. | |
5759 | That's because these variables are temporarily set to nil. | |
5760 | As a result, a hook function cannot straightforwardly alter the value of | |
5761 | these variables. See the Emacs Lisp manual for a way of | |
5762 | accomplishing an equivalent result by using other variables. | |
5763 | ||
5764 | If an unhandled error happens in running these functions, | |
5765 | the variable's value remains nil. That prevents the error | |
5766 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5767 | Vbefore_change_functions = Qnil; |
5768 | ||
7ee72033 | 5769 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5770 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5771 | Three arguments are passed to each function: the positions of |
5772 | the beginning and end of the range of changed text, | |
5773 | and the length in bytes of the pre-change text replaced by that range. | |
5774 | \(For an insertion, the pre-change length is zero; | |
5775 | for a deletion, that length is the number of bytes deleted, | |
5776 | and the post-change beginning and end are at the same place.) | |
5777 | ||
5778 | Buffer changes made while executing the `after-change-functions' | |
5779 | don't call any before-change or after-change functions. | |
5780 | That's because these variables are temporarily set to nil. | |
5781 | As a result, a hook function cannot straightforwardly alter the value of | |
5782 | these variables. See the Emacs Lisp manual for a way of | |
5783 | accomplishing an equivalent result by using other variables. | |
5784 | ||
5785 | If an unhandled error happens in running these functions, | |
5786 | the variable's value remains nil. That prevents the error | |
5787 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5788 | Vafter_change_functions = Qnil; |
5789 | ||
7ee72033 | 5790 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5791 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5792 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5793 | Vfirst_change_hook = Qnil; |
1ab256cb | 5794 | |
7ee72033 MB |
5795 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5796 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5797 | Recent changes come first; older changes follow newer. |
5798 | ||
5799 | An entry (BEG . END) represents an insertion which begins at | |
5800 | position BEG and ends at position END. | |
5801 | ||
5802 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5803 | from (abs POSITION). If POSITION is positive, point was at the front | |
5804 | of the text being deleted; if negative, point was at the end. | |
5805 | ||
5806 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5807 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5808 | of the visited file's modification time, as of that time. If the | |
5809 | modification time of the most recent save is different, this entry is | |
5810 | obsolete. | |
5811 | ||
5812 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5813 | was modified between BEG and END. PROPERTY is the property name, | |
5814 | and VALUE is the old value. | |
5815 | ||
7405f386 KS |
5816 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5817 | \(apply FUN-NAME ARGS). | |
5818 | ||
5819 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5820 | in the active region. BEG and END is the range affected by this entry | |
5821 | and DELTA is the number of bytes added or deleted in that range by | |
5822 | this change. | |
c6c7dc03 | 5823 | |
018ba359 PJ |
5824 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5825 | was adjusted in position by the offset DISTANCE (an integer). | |
5826 | ||
5827 | An entry of the form POSITION indicates that point was at the buffer | |
5828 | location given by the integer. Undoing an entry of this form places | |
5829 | point at POSITION. | |
5830 | ||
5831 | nil marks undo boundaries. The undo command treats the changes | |
5832 | between two undo boundaries as a single step to be undone. | |
5833 | ||
5834 | If the value of the variable is t, undo information is not recorded. */); | |
5835 | ||
7ee72033 MB |
5836 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5837 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5838 | |
7ee72033 MB |
5839 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5840 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5841 | |
5842 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5843 | newlines. Columnar operations (like `move-to-column' and |
5844 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5845 | widths as they go. This works well for ordinary text, but if the |
5846 | buffer's lines are very long (say, more than 500 characters), these | |
5847 | motion functions will take longer to execute. Emacs may also take | |
5848 | longer to update the display. | |
5849 | ||
5629f29b | 5850 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5851 | results of their scans, and consult the cache to avoid rescanning |
5852 | regions of the buffer until the text is modified. The caches are most | |
5853 | beneficial when they prevent the most searching---that is, when the | |
5854 | buffer contains long lines and large regions of characters with the | |
5855 | same, fixed screen width. | |
5856 | ||
5629f29b | 5857 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5858 | become slightly slower (because of the overhead of consulting the |
5859 | cache), and the caches will use memory roughly proportional to the | |
5860 | number of newlines and characters whose screen width varies. | |
5861 | ||
5862 | The caches require no explicit maintenance; their accuracy is | |
5863 | maintained internally by the Emacs primitives. Enabling or disabling | |
5864 | the cache should not affect the behavior of any of the motion | |
5865 | functions; it should only affect their performance. */); | |
5866 | ||
7ee72033 MB |
5867 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5868 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5869 | |
7ee72033 MB |
5870 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5871 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 5872 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5873 | set when a file is visited. */); |
be9aafdd | 5874 | |
71ed49fa LT |
5875 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
5876 | ¤t_buffer->auto_save_file_format, Qnil, | |
5877 | doc: /* *Format in which to write auto-save files. | |
5878 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5879 | If it is t, which is the default, auto-save files are written in the | |
5880 | same format as a regular save would use. */); | |
5881 | ||
3cb719bd | 5882 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
5883 | ¤t_buffer->invisibility_spec, Qnil, |
5884 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
5885 | The default is t, which means that text is invisible |
5886 | if it has a non-nil `invisible' property. | |
5887 | If the value is a list, a text character is invisible if its `invisible' | |
5888 | property is an element in that list. | |
5889 | If an element is a cons cell of the form (PROP . ELLIPSIS), | |
5890 | then characters with property value PROP are invisible, | |
5891 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5892 | |
7962a441 | 5893 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
5894 | ¤t_buffer->display_count, Qnil, |
5895 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 5896 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5897 | |
5898 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
5899 | ¤t_buffer->display_time, Qnil, |
5900 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
5901 | The function `set-window-buffer' updates this variable |
5902 | to the value obtained by calling `current-time'. | |
5903 | If the buffer has never been shown in a window, the value is nil. */); | |
5904 | ||
7ee72033 MB |
5905 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
5906 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
5907 | Non-nil also enables highlighting of the region whenever the mark is active. |
5908 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5a39b770 RS |
5909 | all windows or just the selected window. |
5910 | ||
5911 | If the value is `lambda', that enables Transient Mark mode temporarily | |
5912 | until the next buffer modification. If a command sets the value to `only', | |
b3264fd2 RS |
5913 | that enables Transient Mark mode for the following command only. |
5914 | During that following command, the value of `transient-mark-mode' | |
5915 | is `identity'. If it is still `identity' at the end of that command, | |
5916 | it changes to nil. */); | |
c48f61ef RS |
5917 | Vtransient_mark_mode = Qnil; |
5918 | ||
7ee72033 MB |
5919 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
5920 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
5921 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5922 | text properties. If the value is a list, disregard `buffer-read-only' | |
5923 | and disregard a `read-only' text property if the property value | |
5924 | is a member of the list. */); | |
a96b68f1 RS |
5925 | Vinhibit_read_only = Qnil; |
5926 | ||
7ee72033 | 5927 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
cd8d5236 | 5928 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5929 | Values are interpreted as follows: |
5930 | ||
cd8d5236 RS |
5931 | t use the cursor specified for the frame |
5932 | nil don't display a cursor | |
038c7488 KS |
5933 | box display a filled box cursor |
5934 | hollow display a hollow box cursor | |
6431cf0d KS |
5935 | bar display a vertical bar cursor with default width |
5936 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
398f0da5 RS |
5937 | hbar display a horizontal bar cursor with default height |
5938 | (hbar . HEIGHT) display a horizontal bar cursor with width HEIGHT | |
038c7488 | 5939 | ANYTHING ELSE display a hollow box cursor. |
cd8d5236 RS |
5940 | |
5941 | When the buffer is displayed in a nonselected window, | |
5942 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 5943 | |
a3bbced0 | 5944 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
5945 | ¤t_buffer->extra_line_spacing, Qnil, |
5946 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
5947 | The space is measured in pixels, and put below lines on window systems. |
5948 | If value is a floating point number, it specifies the spacing relative | |
5949 | to the default frame line height. */); | |
a3bbced0 | 5950 | |
0124c5bd | 5951 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 5952 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
0124c5bd RS |
5953 | doc: /* *Cursor type to display in non-selected windows. |
5954 | t means to use hollow box cursor. See `cursor-type' for other values. */); | |
5955 | ||
7ee72033 | 5956 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
efc7e75f | 5957 | doc: /* List of functions called with no args to query before killing a buffer. */); |
dcdffbf6 RS |
5958 | Vkill_buffer_query_functions = Qnil; |
5959 | ||
0dc88e60 | 5960 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
5961 | defsubr (&Sbuffer_list); |
5962 | defsubr (&Sget_buffer); | |
5963 | defsubr (&Sget_file_buffer); | |
5964 | defsubr (&Sget_buffer_create); | |
336cd056 | 5965 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 5966 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
5967 | defsubr (&Sbuffer_name); |
5968 | /*defsubr (&Sbuffer_number);*/ | |
5969 | defsubr (&Sbuffer_file_name); | |
336cd056 | 5970 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 5971 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
5972 | defsubr (&Sbuffer_local_variables); |
5973 | defsubr (&Sbuffer_modified_p); | |
5974 | defsubr (&Sset_buffer_modified_p); | |
5975 | defsubr (&Sbuffer_modified_tick); | |
5976 | defsubr (&Srename_buffer); | |
5977 | defsubr (&Sother_buffer); | |
1ab256cb RM |
5978 | defsubr (&Sbuffer_enable_undo); |
5979 | defsubr (&Skill_buffer); | |
a9ee7a59 | 5980 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
5981 | defsubr (&Sswitch_to_buffer); |
5982 | defsubr (&Spop_to_buffer); | |
5983 | defsubr (&Scurrent_buffer); | |
5984 | defsubr (&Sset_buffer); | |
5985 | defsubr (&Sbarf_if_buffer_read_only); | |
5986 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
5987 | defsubr (&Serase_buffer); |
5988 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 5989 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 5990 | |
52f8ec73 | 5991 | defsubr (&Soverlayp); |
2eec3b4e RS |
5992 | defsubr (&Smake_overlay); |
5993 | defsubr (&Sdelete_overlay); | |
5994 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
5995 | defsubr (&Soverlay_start); |
5996 | defsubr (&Soverlay_end); | |
5997 | defsubr (&Soverlay_buffer); | |
5998 | defsubr (&Soverlay_properties); | |
2eec3b4e | 5999 | defsubr (&Soverlays_at); |
74514898 | 6000 | defsubr (&Soverlays_in); |
2eec3b4e | 6001 | defsubr (&Snext_overlay_change); |
239c932b | 6002 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6003 | defsubr (&Soverlay_recenter); |
6004 | defsubr (&Soverlay_lists); | |
6005 | defsubr (&Soverlay_get); | |
6006 | defsubr (&Soverlay_put); | |
a8c21b48 | 6007 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6008 | } |
6009 | ||
dfcf069d | 6010 | void |
1ab256cb RM |
6011 | keys_of_buffer () |
6012 | { | |
6013 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6014 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6015 | |
6016 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6017 | initialized when that function gets called. */ | |
6018 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 6019 | } |
ab5796a9 MB |
6020 | |
6021 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6022 | (do not change this comment) */ |