Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, |
3 | 1995, 1997, 1998, 1999, 2000, 2001, 2002, | |
aaef169d | 4 | 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
1ab256cb RM |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
c922bc55 | 10 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
1ab256cb | 22 | |
68c45bf0 | 23 | #include <config.h> |
1ab256cb | 24 | |
2381d133 JB |
25 | #include <sys/types.h> |
26 | #include <sys/stat.h> | |
1ab256cb | 27 | #include <sys/param.h> |
9dde47f5 | 28 | #include <errno.h> |
15e7873a | 29 | #include <stdio.h> |
9dde47f5 | 30 | |
2538fae4 | 31 | #ifndef USE_CRT_DLL |
9dde47f5 | 32 | extern int errno; |
2538fae4 | 33 | #endif |
1ab256cb | 34 | |
1ab256cb | 35 | |
dfcf069d AS |
36 | #ifdef HAVE_UNISTD_H |
37 | #include <unistd.h> | |
38 | #endif | |
7ee72033 | 39 | |
1ab256cb | 40 | #include "lisp.h" |
21cf4cf8 | 41 | #include "intervals.h" |
1ab256cb RM |
42 | #include "window.h" |
43 | #include "commands.h" | |
44 | #include "buffer.h" | |
3b06f880 | 45 | #include "charset.h" |
28e969dd | 46 | #include "region-cache.h" |
1ab256cb | 47 | #include "indent.h" |
d014bf88 | 48 | #include "blockinput.h" |
2538fae4 | 49 | #include "keyboard.h" |
e35f6ff7 | 50 | #include "keymap.h" |
08460cd4 | 51 | #include "frame.h" |
1ab256cb RM |
52 | |
53 | struct buffer *current_buffer; /* the current buffer */ | |
54 | ||
55 | /* First buffer in chain of all buffers (in reverse order of creation). | |
56 | Threaded through ->next. */ | |
57 | ||
58 | struct buffer *all_buffers; | |
59 | ||
60 | /* This structure holds the default values of the buffer-local variables | |
61 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
62 | The default value occupies the same slot in this structure | |
63 | as an individual buffer's value occupies in that buffer. | |
64 | Setting the default value also goes through the alist of buffers | |
65 | and stores into each buffer that does not say it has a local value. */ | |
66 | ||
d4f8198b | 67 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
68 | |
69 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
70 | ||
71 | static Lisp_Object Vbuffer_defaults; | |
72 | ||
73 | /* This structure marks which slots in a buffer have corresponding | |
74 | default values in buffer_defaults. | |
75 | Each such slot has a nonzero value in this structure. | |
76 | The value has only one nonzero bit. | |
77 | ||
78 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
79 | the entry for that slot (found in the same slot in this structure) |
80 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
81 | |
82 | If a slot in this structure is -1, then even though there may | |
83 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
84 | and the corresponding slot in buffer_defaults is not used. | |
85 | ||
86 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
87 | but there is a default value which is copied into each buffer. | |
88 | ||
1ab256cb RM |
89 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
90 | zero, that is a bug */ | |
91 | ||
92 | struct buffer buffer_local_flags; | |
93 | ||
94 | /* This structure holds the names of symbols whose values may be | |
95 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
96 | ||
d4f8198b SM |
97 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
98 | ||
1ab256cb RM |
99 | /* A Lisp_Object pointer to the above, used for staticpro */ |
100 | static Lisp_Object Vbuffer_local_symbols; | |
101 | ||
0fa3ba92 JB |
102 | /* This structure holds the required types for the values in the |
103 | buffer-local slots. If a slot contains Qnil, then the | |
104 | corresponding buffer slot may contain a value of any type. If a | |
105 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
106 | equal to that integer (except nil is always allowed). |
107 | When a tag does not match, the function | |
108 | buffer_slot_type_mismatch will signal an error. | |
109 | ||
110 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
111 | struct buffer buffer_local_types; |
112 | ||
13de9290 RS |
113 | /* Flags indicating which built-in buffer-local variables |
114 | are permanent locals. */ | |
7313acd0 | 115 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
116 | |
117 | /* Number of per-buffer variables used. */ | |
118 | ||
7313acd0 | 119 | int last_per_buffer_idx; |
13de9290 | 120 | |
1ab256cb | 121 | Lisp_Object Fset_buffer (); |
01050cb5 | 122 | void set_buffer_internal (); |
c7aa5005 | 123 | void set_buffer_internal_1 (); |
173f2a64 | 124 | static void call_overlay_mod_hooks (); |
2f3f993b | 125 | static void swap_out_buffer_local_variables (); |
13de9290 | 126 | static void reset_buffer_local_variables (); |
1ab256cb RM |
127 | |
128 | /* Alist of all buffer names vs the buffers. */ | |
129 | /* This used to be a variable, but is no longer, | |
130 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
131 | Lisp_Object Vbuffer_alist; | |
132 | ||
133 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
134 | Lisp_Object Vbefore_change_functions; |
135 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 136 | |
c48f61ef RS |
137 | Lisp_Object Vtransient_mark_mode; |
138 | ||
a96b68f1 RS |
139 | /* t means ignore all read-only text properties. |
140 | A list means ignore such a property if its value is a member of the list. | |
141 | Any non-nil value means ignore buffer-read-only. */ | |
142 | Lisp_Object Vinhibit_read_only; | |
143 | ||
dcdffbf6 RS |
144 | /* List of functions to call that can query about killing a buffer. |
145 | If any of these functions returns nil, we don't kill it. */ | |
146 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 147 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 148 | |
43ed3b8d CY |
149 | /* Hook run before changing a major mode. */ |
150 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
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; |
3e145152 | 377 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 378 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
379 | BUF_SAVE_MODIFF (b) = 1; |
380 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
381 | BUF_UNCHANGED_MODIFIED (b) = 1; |
382 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
383 | BUF_END_UNCHANGED (b) = 0; | |
384 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 385 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 386 | |
28e969dd JB |
387 | b->newline_cache = 0; |
388 | b->width_run_cache = 0; | |
389 | b->width_table = Qnil; | |
b5a225b4 | 390 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 391 | |
1ab256cb RM |
392 | /* Put this on the chain of all buffers including killed ones. */ |
393 | b->next = all_buffers; | |
394 | all_buffers = b; | |
395 | ||
336cd056 RS |
396 | /* An ordinary buffer normally doesn't need markers |
397 | to handle BEGV and ZV. */ | |
398 | b->pt_marker = Qnil; | |
399 | b->begv_marker = Qnil; | |
400 | b->zv_marker = Qnil; | |
04ae1b48 RS |
401 | |
402 | name = Fcopy_sequence (name); | |
ab77f05c | 403 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 404 | b->name = name; |
04ae1b48 | 405 | |
d5db4077 | 406 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
407 | b->undo_list = Qnil; |
408 | else | |
409 | b->undo_list = Qt; | |
410 | ||
411 | reset_buffer (b); | |
13de9290 | 412 | reset_buffer_local_variables (b, 1); |
1ab256cb | 413 | |
1f57cb74 | 414 | b->mark = Fmake_marker (); |
65745fad | 415 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
416 | b->name = name; |
417 | ||
1ab256cb | 418 | /* Put this in the alist of all live buffers. */ |
67180c6a | 419 | XSETBUFFER (buf, b); |
1ab256cb RM |
420 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
421 | ||
d36b182f DL |
422 | /* An error in calling the function here (should someone redfine it) |
423 | can lead to infinite regress until you run out of stack. rms | |
424 | says that's not worth protecting against. */ | |
48265e61 | 425 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 426 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
427 | call1 (Qucs_set_table_for_input, buf); |
428 | ||
336cd056 RS |
429 | return buf; |
430 | } | |
431 | ||
7e9d5818 | 432 | |
04e4cb3a GM |
433 | /* Return a list of overlays which is a copy of the overlay list |
434 | LIST, but for buffer B. */ | |
435 | ||
2410d73a | 436 | static struct Lisp_Overlay * |
04e4cb3a GM |
437 | copy_overlays (b, list) |
438 | struct buffer *b; | |
2410d73a | 439 | struct Lisp_Overlay *list; |
04e4cb3a | 440 | { |
2410d73a SM |
441 | Lisp_Object buffer; |
442 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
443 | |
444 | XSETBUFFER (buffer, b); | |
445 | ||
2410d73a | 446 | for (; list; list = list->next) |
04e4cb3a GM |
447 | { |
448 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 449 | EMACS_INT charpos; |
04e4cb3a | 450 | |
2410d73a | 451 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
452 | charpos = marker_position (OVERLAY_START (old_overlay)); |
453 | start = Fmake_marker (); | |
db3a49a6 | 454 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
455 | XMARKER (start)->insertion_type |
456 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
457 | ||
458 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
459 | end = Fmake_marker (); | |
db3a49a6 | 460 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
461 | XMARKER (end)->insertion_type |
462 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
463 | ||
464 | overlay = allocate_misc (); | |
465 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
466 | OVERLAY_START (overlay) = start; | |
467 | OVERLAY_END (overlay) = end; | |
468 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 469 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 470 | |
2410d73a SM |
471 | if (tail) |
472 | tail = tail->next = XOVERLAY (overlay); | |
473 | else | |
474 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
475 | } |
476 | ||
2410d73a | 477 | return result; |
04e4cb3a | 478 | } |
177c0ea7 | 479 | |
04e4cb3a | 480 | |
7e9d5818 GM |
481 | /* Clone per-buffer values of buffer FROM. |
482 | ||
483 | Buffer TO gets the same per-buffer values as FROM, with the | |
484 | following exceptions: (1) TO's name is left untouched, (2) markers | |
485 | are copied and made to refer to TO, and (3) overlay lists are | |
486 | copied. */ | |
487 | ||
488 | static void | |
489 | clone_per_buffer_values (from, to) | |
490 | struct buffer *from, *to; | |
491 | { | |
54622f33 | 492 | Lisp_Object to_buffer; |
7e9d5818 GM |
493 | int offset; |
494 | ||
495 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 496 | |
7e9d5818 GM |
497 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); |
498 | offset < sizeof *to; | |
499 | offset += sizeof (Lisp_Object)) | |
500 | { | |
501 | Lisp_Object obj; | |
502 | ||
503 | obj = PER_BUFFER_VALUE (from, offset); | |
504 | if (MARKERP (obj)) | |
505 | { | |
506 | struct Lisp_Marker *m = XMARKER (obj); | |
507 | obj = Fmake_marker (); | |
508 | XMARKER (obj)->insertion_type = m->insertion_type; | |
509 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
510 | } | |
511 | ||
512 | PER_BUFFER_VALUE (to, offset) = obj; | |
513 | } | |
514 | ||
7e9d5818 | 515 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 516 | |
04e4cb3a GM |
517 | to->overlays_before = copy_overlays (to, from->overlays_before); |
518 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 519 | |
e1688f54 RS |
520 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
521 | and install that in TO. */ | |
522 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
523 | } |
524 | ||
7e9d5818 GM |
525 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
526 | 2, 3, | |
193c3837 | 527 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 528 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
c9aac8e6 | 529 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
530 | NAME should be a string which is not the name of an existing buffer. |
531 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
532 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
533 | CLONE nil means the indirect buffer's state is reset to default values. */) |
534 | (base_buffer, name, clone) | |
7e9d5818 | 535 | Lisp_Object base_buffer, name, clone; |
336cd056 | 536 | { |
c9aac8e6 | 537 | Lisp_Object buf, tem; |
7e9d5818 | 538 | struct buffer *b; |
336cd056 | 539 | |
ab53e065 | 540 | CHECK_STRING (name); |
336cd056 RS |
541 | buf = Fget_buffer (name); |
542 | if (!NILP (buf)) | |
d5db4077 | 543 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 544 | |
c9aac8e6 | 545 | tem = base_buffer; |
336cd056 RS |
546 | base_buffer = Fget_buffer (base_buffer); |
547 | if (NILP (base_buffer)) | |
c9aac8e6 LT |
548 | error ("No such buffer: `%s'", SDATA (tem)); |
549 | if (NILP (XBUFFER (base_buffer)->name)) | |
550 | error ("Base buffer has been killed"); | |
336cd056 | 551 | |
d5db4077 | 552 | if (SCHARS (name) == 0) |
336cd056 RS |
553 | error ("Empty string for buffer name is not allowed"); |
554 | ||
a21260d9 | 555 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
556 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
557 | ||
558 | if (XBUFFER (base_buffer)->base_buffer) | |
559 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
560 | else | |
561 | b->base_buffer = XBUFFER (base_buffer); | |
562 | ||
563 | /* Use the base buffer's text object. */ | |
564 | b->text = b->base_buffer->text; | |
565 | ||
566 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
567 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
568 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
569 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
570 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
571 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
572 | |
573 | b->newline_cache = 0; | |
574 | b->width_run_cache = 0; | |
575 | b->width_table = Qnil; | |
576 | ||
577 | /* Put this on the chain of all buffers including killed ones. */ | |
578 | b->next = all_buffers; | |
579 | all_buffers = b; | |
580 | ||
581 | name = Fcopy_sequence (name); | |
ab77f05c | 582 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
583 | b->name = name; |
584 | ||
585 | reset_buffer (b); | |
13de9290 | 586 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
587 | |
588 | /* Put this in the alist of all live buffers. */ | |
589 | XSETBUFFER (buf, b); | |
590 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
591 | ||
592 | b->mark = Fmake_marker (); | |
1ab256cb | 593 | b->name = name; |
336cd056 | 594 | |
abc9d959 RS |
595 | /* The multibyte status belongs to the base buffer. */ |
596 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
597 | ||
336cd056 RS |
598 | /* Make sure the base buffer has markers for its narrowing. */ |
599 | if (NILP (b->base_buffer->pt_marker)) | |
600 | { | |
601 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
602 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
603 | BUF_PT (b->base_buffer), | |
604 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
605 | } |
606 | if (NILP (b->base_buffer->begv_marker)) | |
607 | { | |
608 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
609 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
610 | BUF_BEGV (b->base_buffer), | |
611 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
612 | } |
613 | if (NILP (b->base_buffer->zv_marker)) | |
614 | { | |
615 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
616 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
617 | BUF_ZV (b->base_buffer), | |
618 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 619 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
620 | } |
621 | ||
7e9d5818 GM |
622 | if (NILP (clone)) |
623 | { | |
624 | /* Give the indirect buffer markers for its narrowing. */ | |
625 | b->pt_marker = Fmake_marker (); | |
626 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
627 | b->begv_marker = Fmake_marker (); | |
628 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
629 | b->zv_marker = Fmake_marker (); | |
630 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
631 | XMARKER (b->zv_marker)->insertion_type = 1; | |
632 | } | |
633 | else | |
7fa57e45 RS |
634 | { |
635 | struct buffer *old_b = current_buffer; | |
636 | ||
637 | clone_per_buffer_values (b->base_buffer, b); | |
638 | b->filename = Qnil; | |
639 | b->file_truename = Qnil; | |
640 | b->display_count = make_number (0); | |
641 | b->backed_up = Qnil; | |
642 | b->auto_save_file_name = Qnil; | |
643 | set_buffer_internal_1 (b); | |
644 | Fset (intern ("buffer-save-without-query"), Qnil); | |
645 | Fset (intern ("buffer-file-number"), Qnil); | |
646 | Fset (intern ("buffer-stale-function"), Qnil); | |
647 | set_buffer_internal_1 (old_b); | |
648 | } | |
336cd056 | 649 | |
a9ee7a59 | 650 | return buf; |
1ab256cb RM |
651 | } |
652 | ||
d4f5719a SM |
653 | void |
654 | delete_all_overlays (b) | |
655 | struct buffer *b; | |
656 | { | |
657 | Lisp_Object overlay; | |
658 | ||
659 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
660 | have to empty the list, otherwise we end up with overlays that | |
661 | think they belong to this buffer while the buffer doesn't know about | |
662 | them any more. */ | |
663 | while (b->overlays_before) | |
664 | { | |
665 | XSETMISC (overlay, b->overlays_before); | |
666 | Fdelete_overlay (overlay); | |
667 | } | |
668 | while (b->overlays_after) | |
669 | { | |
670 | XSETMISC (overlay, b->overlays_after); | |
671 | Fdelete_overlay (overlay); | |
672 | } | |
673 | eassert (b->overlays_before == NULL); | |
674 | eassert (b->overlays_after == NULL); | |
675 | } | |
676 | ||
bcd40520 | 677 | /* Reinitialize everything about a buffer except its name and contents |
c9aac8e6 | 678 | and local variables. |
d4f5719a SM |
679 | If called on an already-initialized buffer, the list of overlays |
680 | should be deleted before calling this function, otherwise we end up | |
681 | with overlays that claim to belong to the buffer but the buffer | |
682 | claims it doesn't belong to it. */ | |
1ab256cb RM |
683 | |
684 | void | |
685 | reset_buffer (b) | |
686 | register struct buffer *b; | |
687 | { | |
688 | b->filename = Qnil; | |
f6ed2e84 | 689 | b->file_truename = Qnil; |
1ab256cb RM |
690 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
691 | b->modtime = 0; | |
8d7a4592 | 692 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 693 | b->last_window_start = 1; |
8b264726 | 694 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
695 | b->clip_changed = 0; |
696 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
697 | b->backed_up = Qnil; |
698 | b->auto_save_modified = 0; | |
84f6bcba | 699 | b->auto_save_failure_time = -1; |
1ab256cb RM |
700 | b->auto_save_file_name = Qnil; |
701 | b->read_only = Qnil; | |
2410d73a SM |
702 | b->overlays_before = NULL; |
703 | b->overlays_after = NULL; | |
c2d5b10f | 704 | b->overlay_center = BEG; |
dfda7a7f | 705 | b->mark_active = Qnil; |
943e065b | 706 | b->point_before_scroll = Qnil; |
be9aafdd | 707 | b->file_format = Qnil; |
71ed49fa | 708 | b->auto_save_file_format = Qt; |
0dc6f165 | 709 | b->last_selected_window = Qnil; |
7962a441 | 710 | XSETINT (b->display_count, 0); |
3fd364db | 711 | b->display_time = Qnil; |
1bf08baf | 712 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 713 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 714 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
715 | |
716 | b->display_error_modiff = 0; | |
1ab256cb RM |
717 | } |
718 | ||
bcd40520 RS |
719 | /* Reset buffer B's local variables info. |
720 | Don't use this on a buffer that has already been in use; | |
721 | it does not treat permanent locals consistently. | |
13de9290 RS |
722 | Instead, use Fkill_all_local_variables. |
723 | ||
724 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
725 | buffer-local variables. If PERMANENT_TOO is 0, | |
726 | we preserve those. */ | |
bcd40520 | 727 | |
13de9290 RS |
728 | static void |
729 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 730 | register struct buffer *b; |
13de9290 | 731 | int permanent_too; |
1ab256cb RM |
732 | { |
733 | register int offset; | |
7c02e886 | 734 | int i; |
1ab256cb RM |
735 | |
736 | /* Reset the major mode to Fundamental, together with all the | |
737 | things that depend on the major mode. | |
738 | default-major-mode is handled at a higher level. | |
739 | We ignore it here. */ | |
740 | b->major_mode = Qfundamental_mode; | |
741 | b->keymap = Qnil; | |
1ab256cb RM |
742 | b->mode_name = QSFundamental; |
743 | b->minor_modes = Qnil; | |
3446af9c RS |
744 | |
745 | /* If the standard case table has been altered and invalidated, | |
746 | fix up its insides first. */ | |
747 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
748 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
749 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
750 | Fset_standard_case_table (Vascii_downcase_table); | |
751 | ||
1ab256cb | 752 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
753 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
754 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
755 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 756 | b->invisibility_spec = Qt; |
2e716096 RS |
757 | #ifndef DOS_NT |
758 | b->buffer_file_type = Qnil; | |
759 | #endif | |
3cb719bd | 760 | |
13de9290 | 761 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 762 | b->local_var_alist = Qnil; |
7313acd0 | 763 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 764 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 765 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
766 | |
767 | /* For each slot that has a default value, | |
768 | copy that into the slot. */ | |
769 | ||
7313acd0 | 770 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
771 | offset < sizeof *b; |
772 | offset += sizeof (Lisp_Object)) | |
aab80822 | 773 | { |
7313acd0 | 774 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
775 | if ((idx > 0 |
776 | && (permanent_too | |
777 | || buffer_permanent_local_flags[idx] == 0)) | |
778 | /* Is -2 used anywhere? */ | |
779 | || idx == -2) | |
7313acd0 | 780 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 781 | } |
1ab256cb RM |
782 | } |
783 | ||
01050cb5 RM |
784 | /* We split this away from generate-new-buffer, because rename-buffer |
785 | and set-visited-file-name ought to be able to use this to really | |
786 | rename the buffer properly. */ | |
787 | ||
788 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 789 | 1, 2, 0, |
7ee72033 | 790 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
791 | If there is no live buffer named NAME, then return NAME. |
792 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
54dffe35 | 793 | \(starting at 2) until an unused name is found, and then return that name. |
018ba359 PJ |
794 | Optional second argument IGNORE specifies a name that is okay to use |
795 | \(if it is in the sequence to be tried) | |
7ee72033 MB |
796 | even if a buffer with that name exists. */) |
797 | (name, ignore) | |
c273e647 | 798 | register Lisp_Object name, ignore; |
1ab256cb RM |
799 | { |
800 | register Lisp_Object gentemp, tem; | |
801 | int count; | |
802 | char number[10]; | |
803 | ||
b7826503 | 804 | CHECK_STRING (name); |
1ab256cb | 805 | |
54dffe35 LT |
806 | tem = Fstring_equal (name, ignore); |
807 | if (!NILP (tem)) | |
808 | return name; | |
1ab256cb | 809 | tem = Fget_buffer (name); |
265a9e55 | 810 | if (NILP (tem)) |
01050cb5 | 811 | return name; |
1ab256cb RM |
812 | |
813 | count = 1; | |
814 | while (1) | |
815 | { | |
816 | sprintf (number, "<%d>", ++count); | |
817 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 818 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
819 | if (!NILP (tem)) |
820 | return gentemp; | |
1ab256cb | 821 | tem = Fget_buffer (gentemp); |
265a9e55 | 822 | if (NILP (tem)) |
01050cb5 | 823 | return gentemp; |
1ab256cb RM |
824 | } |
825 | } | |
826 | ||
827 | \f | |
828 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
829 | doc: /* Return the name of BUFFER, as a string. |
830 | With no argument or nil as argument, return the name of the current buffer. */) | |
831 | (buffer) | |
1ab256cb RM |
832 | register Lisp_Object buffer; |
833 | { | |
265a9e55 | 834 | if (NILP (buffer)) |
1ab256cb | 835 | return current_buffer->name; |
b7826503 | 836 | CHECK_BUFFER (buffer); |
1ab256cb RM |
837 | return XBUFFER (buffer)->name; |
838 | } | |
839 | ||
840 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
841 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
842 | No argument or nil as argument means use the current buffer. */) | |
843 | (buffer) | |
1ab256cb RM |
844 | register Lisp_Object buffer; |
845 | { | |
265a9e55 | 846 | if (NILP (buffer)) |
1ab256cb | 847 | return current_buffer->filename; |
b7826503 | 848 | CHECK_BUFFER (buffer); |
1ab256cb RM |
849 | return XBUFFER (buffer)->filename; |
850 | } | |
851 | ||
336cd056 RS |
852 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
853 | 0, 1, 0, | |
7ee72033 | 854 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
855 | If BUFFER is not indirect, return nil. |
856 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 857 | (buffer) |
336cd056 RS |
858 | register Lisp_Object buffer; |
859 | { | |
860 | struct buffer *base; | |
861 | Lisp_Object base_buffer; | |
862 | ||
863 | if (NILP (buffer)) | |
864 | base = current_buffer->base_buffer; | |
865 | else | |
866 | { | |
b7826503 | 867 | CHECK_BUFFER (buffer); |
336cd056 RS |
868 | base = XBUFFER (buffer)->base_buffer; |
869 | } | |
870 | ||
871 | if (! base) | |
872 | return Qnil; | |
873 | XSETBUFFER (base_buffer, base); | |
874 | return base_buffer; | |
875 | } | |
876 | ||
79aa712d | 877 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 878 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
879 | doc: /* Return the value of VARIABLE in BUFFER. |
880 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
881 | is the default binding of the variable. */) |
882 | (variable, buffer) | |
883 | register Lisp_Object variable; | |
79aa712d RS |
884 | register Lisp_Object buffer; |
885 | { | |
886 | register struct buffer *buf; | |
887 | register Lisp_Object result; | |
888 | ||
5e2ad10b | 889 | CHECK_SYMBOL (variable); |
ae69175b | 890 | CHECK_BUFFER (buffer); |
79aa712d RS |
891 | buf = XBUFFER (buffer); |
892 | ||
0e4d0c9a RS |
893 | if (SYMBOLP (variable)) |
894 | variable = indirect_variable (variable); | |
895 | ||
79aa712d | 896 | /* Look in local_var_list */ |
5e2ad10b | 897 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 898 | if (NILP (result)) |
79aa712d RS |
899 | { |
900 | int offset, idx; | |
901 | int found = 0; | |
902 | ||
903 | /* Look in special slots */ | |
904 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
905 | offset < sizeof (struct buffer); | |
906 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
907 | offset += (sizeof (EMACS_INT))) | |
908 | { | |
909 | idx = PER_BUFFER_IDX (offset); | |
910 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 911 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 912 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
913 | { |
914 | result = PER_BUFFER_VALUE (buf, offset); | |
915 | found = 1; | |
916 | break; | |
917 | } | |
918 | } | |
919 | ||
920 | if (!found) | |
5e2ad10b | 921 | result = Fdefault_value (variable); |
79aa712d RS |
922 | } |
923 | else | |
f0bac7de RS |
924 | { |
925 | Lisp_Object valcontents; | |
926 | Lisp_Object current_alist_element; | |
927 | ||
928 | /* What binding is loaded right now? */ | |
5e2ad10b | 929 | valcontents = SYMBOL_VALUE (variable); |
f0bac7de RS |
930 | current_alist_element |
931 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
932 | ||
933 | /* The value of the currently loaded binding is not | |
934 | stored in it, but rather in the realvalue slot. | |
935 | Store that value into the binding it belongs to | |
936 | in case that is the one we are about to use. */ | |
937 | ||
938 | Fsetcdr (current_alist_element, | |
939 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
940 | ||
941 | /* Now get the (perhaps updated) value out of the binding. */ | |
942 | result = XCDR (result); | |
943 | } | |
79aa712d | 944 | |
4c4dc0b0 KS |
945 | if (!EQ (result, Qunbound)) |
946 | return result; | |
79aa712d | 947 | |
4c4dc0b0 | 948 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
949 | } |
950 | ||
e1688f54 | 951 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 952 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
953 | in special slots in the buffer object. */ |
954 | ||
955 | static Lisp_Object | |
956 | buffer_lisp_local_variables (buf) | |
957 | struct buffer *buf; | |
958 | { | |
959 | Lisp_Object result = Qnil; | |
960 | register Lisp_Object tail; | |
961 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
962 | { | |
963 | Lisp_Object val, elt; | |
964 | ||
965 | elt = XCAR (tail); | |
966 | ||
967 | /* Reference each variable in the alist in buf. | |
968 | If inquiring about the current buffer, this gets the current values, | |
969 | so store them into the alist so the alist is up to date. | |
970 | If inquiring about some other buffer, this swaps out any values | |
971 | for that buffer, making the alist up to date automatically. */ | |
972 | val = find_symbol_value (XCAR (elt)); | |
973 | /* Use the current buffer value only if buf is the current buffer. */ | |
974 | if (buf != current_buffer) | |
975 | val = XCDR (elt); | |
976 | ||
977 | /* If symbol is unbound, put just the symbol in the list. */ | |
978 | if (EQ (val, Qunbound)) | |
979 | result = Fcons (XCAR (elt), result); | |
980 | /* Otherwise, put (symbol . value) in the list. */ | |
981 | else | |
982 | result = Fcons (Fcons (XCAR (elt), val), result); | |
983 | } | |
984 | ||
985 | return result; | |
986 | } | |
987 | ||
1ab256cb | 988 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 989 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 990 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
991 | Most elements look like (SYMBOL . VALUE), describing one variable. |
992 | For a symbol that is locally unbound, just the symbol appears in the value. | |
993 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
994 | No argument or nil as argument means use current buffer as BUFFER. */) |
995 | (buffer) | |
1ab256cb RM |
996 | register Lisp_Object buffer; |
997 | { | |
998 | register struct buffer *buf; | |
553defa4 | 999 | register Lisp_Object result; |
1ab256cb | 1000 | |
265a9e55 | 1001 | if (NILP (buffer)) |
1ab256cb RM |
1002 | buf = current_buffer; |
1003 | else | |
1004 | { | |
b7826503 | 1005 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1006 | buf = XBUFFER (buffer); |
1007 | } | |
1008 | ||
e1688f54 | 1009 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1010 | |
1ab256cb RM |
1011 | /* Add on all the variables stored in special slots. */ |
1012 | { | |
7c02e886 | 1013 | int offset, idx; |
1ab256cb | 1014 | |
7313acd0 | 1015 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 1016 | offset < sizeof (struct buffer); |
7c02e886 GM |
1017 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1018 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1019 | { |
7313acd0 GM |
1020 | idx = PER_BUFFER_IDX (offset); |
1021 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1022 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1023 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1024 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1025 | result); |
1ab256cb RM |
1026 | } |
1027 | } | |
553defa4 RS |
1028 | |
1029 | return result; | |
1ab256cb | 1030 | } |
1ab256cb RM |
1031 | \f |
1032 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1033 | 0, 1, 0, |
7ee72033 MB |
1034 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1035 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1036 | (buffer) | |
1ab256cb RM |
1037 | register Lisp_Object buffer; |
1038 | { | |
1039 | register struct buffer *buf; | |
265a9e55 | 1040 | if (NILP (buffer)) |
1ab256cb RM |
1041 | buf = current_buffer; |
1042 | else | |
1043 | { | |
b7826503 | 1044 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1045 | buf = XBUFFER (buffer); |
1046 | } | |
1047 | ||
336cd056 | 1048 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1049 | } |
1050 | ||
1051 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1052 | 1, 1, 0, |
7ee72033 MB |
1053 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1054 | A non-nil FLAG means mark the buffer modified. */) | |
1055 | (flag) | |
1ab256cb RM |
1056 | register Lisp_Object flag; |
1057 | { | |
1058 | register int already; | |
1059 | register Lisp_Object fn; | |
8ec01c70 | 1060 | Lisp_Object buffer, window; |
1ab256cb RM |
1061 | |
1062 | #ifdef CLASH_DETECTION | |
1063 | /* If buffer becoming modified, lock the file. | |
1064 | If buffer becoming unmodified, unlock the file. */ | |
1065 | ||
60f4dd23 | 1066 | fn = current_buffer->file_truename; |
90d456d2 KH |
1067 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1068 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1069 | { |
336cd056 | 1070 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1071 | if (!already && !NILP (flag)) |
1ab256cb | 1072 | lock_file (fn); |
265a9e55 | 1073 | else if (already && NILP (flag)) |
1ab256cb RM |
1074 | unlock_file (fn); |
1075 | } | |
1076 | #endif /* CLASH_DETECTION */ | |
1077 | ||
336cd056 | 1078 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1079 | |
8ec01c70 GM |
1080 | /* Set update_mode_lines only if buffer is displayed in some window. |
1081 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1082 | state by recording/restoring the state around blocks of code. | |
1083 | Setting update_mode_lines makes redisplay consider all windows | |
1084 | (on all frames). Stealth fontification of buffers not displayed | |
1085 | would incur additional redisplay costs if we'd set | |
1086 | update_modes_lines unconditionally. | |
1087 | ||
1088 | Ideally, I think there should be another mechanism for fontifying | |
1089 | buffers without "modifying" buffers, or redisplay should be | |
1090 | smarter about updating the `*' in mode lines. --gerd */ | |
1091 | XSETBUFFER (buffer, current_buffer); | |
1092 | window = Fget_buffer_window (buffer, Qt); | |
1093 | if (WINDOWP (window)) | |
d57b83b3 GM |
1094 | { |
1095 | ++update_mode_lines; | |
1096 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1097 | } | |
177c0ea7 | 1098 | |
1ab256cb RM |
1099 | return flag; |
1100 | } | |
1101 | ||
a8c21b48 GM |
1102 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1103 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1104 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1105 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1106 | state of the current buffer. Use with care. */) |
1107 | (flag) | |
a8c21b48 GM |
1108 | Lisp_Object flag; |
1109 | { | |
1110 | #ifdef CLASH_DETECTION | |
1111 | Lisp_Object fn; | |
177c0ea7 | 1112 | |
a8c21b48 GM |
1113 | /* If buffer becoming modified, lock the file. |
1114 | If buffer becoming unmodified, unlock the file. */ | |
1115 | ||
1116 | fn = current_buffer->file_truename; | |
1117 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1118 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1119 | { | |
1120 | int already = SAVE_MODIFF < MODIFF; | |
1121 | if (!already && !NILP (flag)) | |
1122 | lock_file (fn); | |
1123 | else if (already && NILP (flag)) | |
1124 | unlock_file (fn); | |
1125 | } | |
1126 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1127 | |
a8c21b48 GM |
1128 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1129 | return flag; | |
1130 | } | |
1131 | ||
1ab256cb | 1132 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1133 | 0, 1, 0, |
7ee72033 | 1134 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
018ba359 PJ |
1135 | Each buffer has a tick counter which is incremented each time the text in |
1136 | that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1137 | No argument or nil as argument means use current buffer as BUFFER. */) |
1138 | (buffer) | |
1ab256cb RM |
1139 | register Lisp_Object buffer; |
1140 | { | |
1141 | register struct buffer *buf; | |
265a9e55 | 1142 | if (NILP (buffer)) |
1ab256cb RM |
1143 | buf = current_buffer; |
1144 | else | |
1145 | { | |
b7826503 | 1146 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1147 | buf = XBUFFER (buffer); |
1148 | } | |
1149 | ||
1150 | return make_number (BUF_MODIFF (buf)); | |
1151 | } | |
3e145152 CY |
1152 | |
1153 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1154 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1155 | doc: /* Return BUFFER's character-change tick counter. | |
1156 | Each buffer has a character-change tick counter, which is set to the | |
1157 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1158 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1159 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1160 | you can tell whether a character change occurred in that buffer in |
1161 | between these calls. No argument or nil as argument means use current | |
1162 | buffer as BUFFER. */) | |
1163 | (buffer) | |
1164 | register Lisp_Object buffer; | |
1165 | { | |
1166 | register struct buffer *buf; | |
1167 | if (NILP (buffer)) | |
1168 | buf = current_buffer; | |
1169 | else | |
1170 | { | |
1171 | CHECK_BUFFER (buffer); | |
1172 | buf = XBUFFER (buffer); | |
1173 | } | |
1174 | ||
1175 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1176 | } | |
1ab256cb | 1177 | \f |
01050cb5 | 1178 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1179 | "sRename buffer (to new name): \nP", |
7ee72033 | 1180 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1181 | If second arg UNIQUE is nil or omitted, it is an error if a |
1182 | buffer named NEWNAME already exists. | |
1183 | If UNIQUE is non-nil, come up with a new name using | |
1184 | `generate-new-buffer-name'. | |
1185 | Interactively, you can set UNIQUE with a prefix argument. | |
1186 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1187 | This does not change the name of the visited file (if any). */) |
1188 | (newname, unique) | |
489c043a | 1189 | register Lisp_Object newname, unique; |
1ab256cb RM |
1190 | { |
1191 | register Lisp_Object tem, buf; | |
1192 | ||
b7826503 | 1193 | CHECK_STRING (newname); |
d59698c4 | 1194 | |
d5db4077 | 1195 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1196 | error ("Empty string is invalid as a buffer name"); |
1197 | ||
489c043a | 1198 | tem = Fget_buffer (newname); |
265a9e55 | 1199 | if (!NILP (tem)) |
01050cb5 | 1200 | { |
8801a864 KR |
1201 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1202 | rename the buffer automatically so you can create another | |
1203 | with the original name. It makes UNIQUE equivalent to | |
1204 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1205 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1206 | return current_buffer->name; | |
3bd779aa | 1207 | if (!NILP (unique)) |
489c043a | 1208 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1209 | else |
d5db4077 | 1210 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1211 | } |
1ab256cb | 1212 | |
489c043a | 1213 | current_buffer->name = newname; |
76f590d7 JB |
1214 | |
1215 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1216 | any windows displaying current_buffer will stay unchanged. */ | |
1217 | update_mode_lines++; | |
1218 | ||
67180c6a | 1219 | XSETBUFFER (buf, current_buffer); |
489c043a | 1220 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1221 | if (NILP (current_buffer->filename) |
1222 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1223 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1224 | /* Refetch since that last call may have done GC. */ |
1225 | return current_buffer->name; | |
1ab256cb RM |
1226 | } |
1227 | ||
773fbdb9 | 1228 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1229 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1230 | Buffers not visible in windows are preferred to visible buffers, |
1231 | unless optional second argument VISIBLE-OK is non-nil. | |
1232 | If the optional third argument FRAME is non-nil, use that frame's | |
1233 | buffer list instead of the selected frame's buffer list. | |
1234 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1235 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1236 | (buffer, visible_ok, frame) | |
773fbdb9 | 1237 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1238 | { |
89132f25 | 1239 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1240 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1241 | notsogood = Qnil; |
1242 | ||
773fbdb9 | 1243 | if (NILP (frame)) |
9ba9623d | 1244 | frame = selected_frame; |
773fbdb9 | 1245 | |
7962a441 | 1246 | tail = Vbuffer_alist; |
773fbdb9 | 1247 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1248 | |
1249 | /* Consider buffers that have been seen in the selected frame | |
1250 | before other buffers. */ | |
177c0ea7 | 1251 | |
773fbdb9 | 1252 | tem = frame_buffer_list (frame); |
7962a441 RS |
1253 | add_ons = Qnil; |
1254 | while (CONSP (tem)) | |
1255 | { | |
7539e11f KR |
1256 | if (BUFFERP (XCAR (tem))) |
1257 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1258 | tem = XCDR (tem); | |
7962a441 RS |
1259 | } |
1260 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1261 | ||
6d70a280 | 1262 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1263 | { |
6d70a280 | 1264 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1265 | if (EQ (buf, buffer)) |
1266 | continue; | |
d674d13e RS |
1267 | if (NILP (buf)) |
1268 | continue; | |
1269 | if (NILP (XBUFFER (buf)->name)) | |
1270 | continue; | |
10ceceb8 | 1271 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1272 | continue; |
04ae1b48 RS |
1273 | /* If the selected frame has a buffer_predicate, |
1274 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1275 | if (!NILP (pred)) |
04ae1b48 | 1276 | { |
7962a441 | 1277 | tem = call1 (pred, buf); |
04ae1b48 RS |
1278 | if (NILP (tem)) |
1279 | continue; | |
1280 | } | |
04ae1b48 | 1281 | |
a0ebb746 | 1282 | if (NILP (visible_ok)) |
66ffe51c | 1283 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1284 | else |
1285 | tem = Qnil; | |
265a9e55 | 1286 | if (NILP (tem)) |
1ab256cb | 1287 | return buf; |
265a9e55 | 1288 | if (NILP (notsogood)) |
1ab256cb RM |
1289 | notsogood = buf; |
1290 | } | |
265a9e55 | 1291 | if (!NILP (notsogood)) |
1ab256cb | 1292 | return notsogood; |
dba1a30a GM |
1293 | buf = Fget_buffer (build_string ("*scratch*")); |
1294 | if (NILP (buf)) | |
1295 | { | |
1296 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1297 | Fset_buffer_major_mode (buf); | |
1298 | } | |
89132f25 | 1299 | return buf; |
1ab256cb RM |
1300 | } |
1301 | \f | |
1ab256cb RM |
1302 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1303 | 0, 1, "", | |
7ee72033 MB |
1304 | doc: /* Start keeping undo information for buffer BUFFER. |
1305 | No argument or nil as argument means do this for the current buffer. */) | |
1306 | (buffer) | |
ffd56f97 | 1307 | register Lisp_Object buffer; |
1ab256cb | 1308 | { |
ffd56f97 | 1309 | Lisp_Object real_buffer; |
1ab256cb | 1310 | |
ffd56f97 | 1311 | if (NILP (buffer)) |
67180c6a | 1312 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1313 | else |
1314 | { | |
ffd56f97 JB |
1315 | real_buffer = Fget_buffer (buffer); |
1316 | if (NILP (real_buffer)) | |
1317 | nsberror (buffer); | |
1ab256cb RM |
1318 | } |
1319 | ||
ffd56f97 JB |
1320 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1321 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1322 | |
1323 | return Qnil; | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1328 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1329 | The buffer being killed will be current while the hook is running.\n\ | |
1330 | See `kill-buffer'." | |
1331 | */ | |
1332 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1333 | doc: /* Kill the buffer BUFFER. |
018ba359 PJ |
1334 | The argument may be a buffer or may be the name of a buffer. |
1335 | An argument of nil means kill the current buffer. | |
1336 | ||
1337 | Value is t if the buffer is actually killed, nil if user says no. | |
1338 | ||
1339 | The value of `kill-buffer-hook' (which may be local to that buffer), | |
1340 | if not void, is a list of functions to be called, with no arguments, | |
1341 | before the buffer is actually killed. The buffer to be killed is current | |
1342 | when the hook functions are called. | |
1343 | ||
1344 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1345 | with SIGHUP. */) |
1346 | (buffer) | |
a25f13ae | 1347 | Lisp_Object buffer; |
1ab256cb RM |
1348 | { |
1349 | Lisp_Object buf; | |
1350 | register struct buffer *b; | |
1351 | register Lisp_Object tem; | |
1352 | register struct Lisp_Marker *m; | |
6af718a4 | 1353 | struct gcpro gcpro1; |
1ab256cb | 1354 | |
a25f13ae | 1355 | if (NILP (buffer)) |
1ab256cb RM |
1356 | buf = Fcurrent_buffer (); |
1357 | else | |
a25f13ae | 1358 | buf = Fget_buffer (buffer); |
265a9e55 | 1359 | if (NILP (buf)) |
a25f13ae | 1360 | nsberror (buffer); |
1ab256cb RM |
1361 | |
1362 | b = XBUFFER (buf); | |
1363 | ||
4a4a9db5 KH |
1364 | /* Avoid trouble for buffer already dead. */ |
1365 | if (NILP (b->name)) | |
1366 | return Qnil; | |
1367 | ||
1ab256cb | 1368 | /* Query if the buffer is still modified. */ |
265a9e55 | 1369 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1370 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1371 | { |
a25f13ae | 1372 | GCPRO1 (buf); |
5c4930b0 RS |
1373 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1374 | b->name, make_number (0))); | |
1ab256cb | 1375 | UNGCPRO; |
265a9e55 | 1376 | if (NILP (tem)) |
1ab256cb RM |
1377 | return Qnil; |
1378 | } | |
1379 | ||
dcdffbf6 | 1380 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1381 | { |
aed13378 | 1382 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1383 | Lisp_Object arglist[1]; |
1ab256cb RM |
1384 | |
1385 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1386 | set_buffer_internal (b); | |
dcdffbf6 RS |
1387 | |
1388 | /* First run the query functions; if any query is answered no, | |
1389 | don't kill the buffer. */ | |
5b20caf0 | 1390 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1391 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1392 | if (NILP (tem)) | |
5b20caf0 | 1393 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1394 | |
1395 | /* Then run the hooks. */ | |
f1597a3a | 1396 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1397 | unbind_to (count, Qnil); |
1398 | } | |
1399 | ||
1400 | /* We have no more questions to ask. Verify that it is valid | |
1401 | to kill the buffer. This must be done after the questions | |
1402 | since anything can happen within do_yes_or_no_p. */ | |
1403 | ||
1404 | /* Don't kill the minibuffer now current. */ | |
1405 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1406 | return Qnil; | |
1407 | ||
265a9e55 | 1408 | if (NILP (b->name)) |
1ab256cb RM |
1409 | return Qnil; |
1410 | ||
336cd056 RS |
1411 | /* When we kill a base buffer, kill all its indirect buffers. |
1412 | We do it at this stage so nothing terrible happens if they | |
1413 | ask questions or their hooks get errors. */ | |
1414 | if (! b->base_buffer) | |
1415 | { | |
1416 | struct buffer *other; | |
1417 | ||
1418 | GCPRO1 (buf); | |
1419 | ||
1420 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1421 | /* all_buffers contains dead buffers too; |
1422 | don't re-kill them. */ | |
1423 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1424 | { |
1425 | Lisp_Object buf; | |
1426 | XSETBUFFER (buf, other); | |
1427 | Fkill_buffer (buf); | |
1428 | } | |
1429 | ||
1430 | UNGCPRO; | |
1431 | } | |
177c0ea7 | 1432 | |
1ab256cb RM |
1433 | /* Make this buffer not be current. |
1434 | In the process, notice if this is the sole visible buffer | |
1435 | and give up if so. */ | |
1436 | if (b == current_buffer) | |
1437 | { | |
773fbdb9 | 1438 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1439 | Fset_buffer (tem); |
1440 | if (b == current_buffer) | |
1441 | return Qnil; | |
1442 | } | |
1443 | ||
77270fac GM |
1444 | /* Notice if the buffer to kill is the sole visible buffer |
1445 | when we're currently in the mini-buffer, and give up if so. */ | |
1446 | XSETBUFFER (tem, current_buffer); | |
1447 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1448 | { | |
1449 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1450 | if (EQ (buf, tem)) |
1451 | return Qnil; | |
1452 | } | |
1453 | ||
1ab256cb RM |
1454 | /* Now there is no question: we can kill the buffer. */ |
1455 | ||
1456 | #ifdef CLASH_DETECTION | |
1457 | /* Unlock this buffer's file, if it is locked. */ | |
1458 | unlock_buffer (b); | |
1459 | #endif /* CLASH_DETECTION */ | |
1460 | ||
1ab256cb | 1461 | kill_buffer_processes (buf); |
b93fb365 | 1462 | clear_charpos_cache (b); |
1ab256cb RM |
1463 | |
1464 | tem = Vinhibit_quit; | |
1465 | Vinhibit_quit = Qt; | |
00550f94 | 1466 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1467 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1468 | frames_discard_buffer (buf); |
1ab256cb RM |
1469 | Vinhibit_quit = tem; |
1470 | ||
9cf712eb RS |
1471 | /* Delete any auto-save file, if we saved it in this session. |
1472 | But not if the buffer is modified. */ | |
a7a60ce9 | 1473 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1474 | && b->auto_save_modified != 0 |
9cf712eb | 1475 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
d674d13e RS |
1476 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1477 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1478 | { |
1479 | Lisp_Object tem; | |
1480 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1481 | if (! NILP (tem)) |
cbb6a418 | 1482 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1483 | } |
1484 | ||
4a4a9db5 KH |
1485 | if (b->base_buffer) |
1486 | { | |
1487 | /* Unchain all markers that belong to this indirect buffer. | |
1488 | Don't unchain the markers that belong to the base buffer | |
1489 | or its other indirect buffers. */ | |
65745fad | 1490 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1491 | { |
65745fad | 1492 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1493 | if (m->buffer == b) |
65745fad SM |
1494 | unchain_marker (m); |
1495 | m = next; | |
4a4a9db5 KH |
1496 | } |
1497 | } | |
1498 | else | |
1ab256cb | 1499 | { |
4a4a9db5 | 1500 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1501 | and leave them pointing nowhere. */ |
65745fad | 1502 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1503 | { |
65745fad | 1504 | struct Lisp_Marker *next = m->next; |
336cd056 | 1505 | m->buffer = 0; |
65745fad SM |
1506 | m->next = NULL; |
1507 | m = next; | |
336cd056 | 1508 | } |
65745fad | 1509 | BUF_MARKERS (b) = NULL; |
336cd056 | 1510 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1511 | |
1512 | /* Perhaps we should explicitly free the interval tree here... */ | |
1513 | } | |
33f7013e | 1514 | |
2f3f993b RS |
1515 | /* Reset the local variables, so that this buffer's local values |
1516 | won't be protected from GC. They would be protected | |
1517 | if they happened to remain encached in their symbols. | |
1518 | This gets rid of them for certain. */ | |
1519 | swap_out_buffer_local_variables (b); | |
13de9290 | 1520 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1521 | |
1ab256cb | 1522 | b->name = Qnil; |
336cd056 | 1523 | |
9ac0d9e0 | 1524 | BLOCK_INPUT; |
336cd056 | 1525 | if (! b->base_buffer) |
b86af064 | 1526 | free_buffer_text (b); |
336cd056 | 1527 | |
28e969dd JB |
1528 | if (b->newline_cache) |
1529 | { | |
1530 | free_region_cache (b->newline_cache); | |
1531 | b->newline_cache = 0; | |
1532 | } | |
1533 | if (b->width_run_cache) | |
1534 | { | |
1535 | free_region_cache (b->width_run_cache); | |
1536 | b->width_run_cache = 0; | |
1537 | } | |
1538 | b->width_table = Qnil; | |
9ac0d9e0 | 1539 | UNBLOCK_INPUT; |
1ab256cb RM |
1540 | b->undo_list = Qnil; |
1541 | ||
1542 | return Qt; | |
1543 | } | |
1544 | \f | |
36a8c287 JB |
1545 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1546 | we do this each time BUF is selected visibly, the more recently | |
1547 | selected buffers are always closer to the front of the list. This | |
1548 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1549 | |
01136e9b | 1550 | void |
1ab256cb RM |
1551 | record_buffer (buf) |
1552 | Lisp_Object buf; | |
1553 | { | |
1554 | register Lisp_Object link, prev; | |
773fbdb9 | 1555 | Lisp_Object frame; |
9ba9623d | 1556 | frame = selected_frame; |
1ab256cb RM |
1557 | |
1558 | prev = Qnil; | |
7539e11f | 1559 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1560 | { |
7539e11f | 1561 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1562 | break; |
1563 | prev = link; | |
1564 | } | |
1565 | ||
36a8c287 JB |
1566 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1567 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1568 | |
265a9e55 | 1569 | if (NILP (prev)) |
7539e11f | 1570 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1571 | else |
f3fbd155 | 1572 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1573 | |
f3fbd155 | 1574 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1575 | Vbuffer_alist = link; |
7962a441 RS |
1576 | |
1577 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1578 | ||
1579 | prev = Qnil; | |
773fbdb9 | 1580 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1581 | link = XCDR (link)) |
7962a441 | 1582 | { |
7539e11f | 1583 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1584 | break; |
1585 | prev = link; | |
1586 | } | |
1587 | ||
1588 | /* Effectively do delq. */ | |
1589 | ||
1590 | if (CONSP (link)) | |
1591 | { | |
1592 | if (NILP (prev)) | |
773fbdb9 | 1593 | set_frame_buffer_list (frame, |
7539e11f | 1594 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1595 | else |
f3fbd155 | 1596 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1597 | |
f3fbd155 | 1598 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1599 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1600 | } |
1601 | else | |
773fbdb9 | 1602 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1603 | } |
1604 | ||
a9ee7a59 | 1605 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1606 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1607 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1608 | according to `default-major-mode'. |
018ba359 | 1609 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1610 | the current buffer's major mode. */) |
1611 | (buffer) | |
a2428fa2 | 1612 | Lisp_Object buffer; |
a9ee7a59 KH |
1613 | { |
1614 | int count; | |
1615 | Lisp_Object function; | |
1616 | ||
71a0f2c6 | 1617 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1618 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1619 | function = find_symbol_value (intern ("initial-major-mode")); |
1620 | else | |
1621 | { | |
1622 | function = buffer_defaults.major_mode; | |
1623 | if (NILP (function) | |
1624 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1625 | function = current_buffer->major_mode; | |
1626 | } | |
177c0ea7 | 1627 | |
48265e61 DL |
1628 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1629 | return Qnil; | |
1630 | ||
aed13378 | 1631 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1632 | |
48265e61 DL |
1633 | /* To select a nonfundamental mode, |
1634 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1635 | |
1636 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1637 | ||
a2428fa2 | 1638 | Fset_buffer (buffer); |
48265e61 | 1639 | call0 (function); |
a9ee7a59 KH |
1640 | |
1641 | return unbind_to (count, Qnil); | |
1642 | } | |
1643 | ||
2594e0fd RS |
1644 | /* If switching buffers in WINDOW would be an error, return |
1645 | a C string saying what the error would be. */ | |
1646 | ||
1647 | char * | |
1648 | no_switch_window (window) | |
1649 | Lisp_Object window; | |
1ab256cb | 1650 | { |
1ab256cb | 1651 | Lisp_Object tem; |
2594e0fd RS |
1652 | if (EQ (minibuf_window, window)) |
1653 | return "Cannot switch buffers in minibuffer window"; | |
1654 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1655 | if (EQ (tem, Qt)) |
2594e0fd RS |
1656 | return "Cannot switch buffers in a dedicated window"; |
1657 | return NULL; | |
1658 | } | |
1659 | ||
1660 | /* Switch to buffer BUFFER in the selected window. | |
1661 | If NORECORD is non-nil, don't call record_buffer. */ | |
1662 | ||
1663 | Lisp_Object | |
1664 | switch_to_buffer_1 (buffer, norecord) | |
1665 | Lisp_Object buffer, norecord; | |
1666 | { | |
1667 | register Lisp_Object buf; | |
1ab256cb | 1668 | |
a25f13ae | 1669 | if (NILP (buffer)) |
773fbdb9 | 1670 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1671 | else |
a9ee7a59 | 1672 | { |
a25f13ae | 1673 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1674 | if (NILP (buf)) |
1675 | { | |
a25f13ae | 1676 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1677 | Fset_buffer_major_mode (buf); |
1678 | } | |
1679 | } | |
1ab256cb | 1680 | Fset_buffer (buf); |
265a9e55 | 1681 | if (NILP (norecord)) |
1ab256cb RM |
1682 | record_buffer (buf); |
1683 | ||
1684 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1685 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1686 | : selected_window, | |
2ad8731a | 1687 | buf, Qnil); |
1ab256cb | 1688 | |
cd0c235a | 1689 | return buf; |
1ab256cb RM |
1690 | } |
1691 | ||
2594e0fd | 1692 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1693 | doc: /* Select buffer BUFFER in the current window. |
a6dced2a LT |
1694 | If BUFFER does not identify an existing buffer, |
1695 | then this function creates a buffer with that name. | |
1696 | ||
1697 | When called from Lisp, BUFFER may be a buffer, a string \(a buffer name), | |
1698 | or nil. If BUFFER is nil, then this function chooses a buffer | |
1699 | using `other-buffer'. | |
018ba359 PJ |
1700 | Optional second arg NORECORD non-nil means |
1701 | do not put this buffer at the front of the list of recently selected ones. | |
a6dced2a | 1702 | This function returns the buffer it switched to. |
018ba359 PJ |
1703 | |
1704 | WARNING: This is NOT the way to work on another buffer temporarily | |
1705 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1706 | the window-buffer correspondences. */) |
1707 | (buffer, norecord) | |
2594e0fd RS |
1708 | Lisp_Object buffer, norecord; |
1709 | { | |
1710 | char *err; | |
1711 | ||
27c6b98e | 1712 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
fab45703 | 1713 | { |
611ac521 RS |
1714 | /* Basically a NOP. Avoid signalling an error in the case where |
1715 | the selected window is dedicated, or a minibuffer. */ | |
1716 | ||
1717 | /* But do put this buffer at the front of the buffer list, | |
1718 | unless that has been inhibited. Note that even if | |
1719 | BUFFER is at the front of the main buffer-list already, | |
1720 | we still want to move it to the front of the frame's buffer list. */ | |
1721 | if (NILP (norecord)) | |
fab45703 | 1722 | record_buffer (buffer); |
fab45703 NR |
1723 | return Fset_buffer (buffer); |
1724 | } | |
27c6b98e | 1725 | |
2594e0fd RS |
1726 | err = no_switch_window (selected_window); |
1727 | if (err) error (err); | |
1728 | ||
1729 | return switch_to_buffer_1 (buffer, norecord); | |
1730 | } | |
1731 | ||
cd0c235a | 1732 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1733 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
a6dced2a LT |
1734 | BUFFER may be a buffer, a string \(a buffer name), or nil. |
1735 | If BUFFER is a string which is not the name of an existing buffer, | |
1736 | then this function creates a buffer with that name. | |
1737 | If BUFFER is nil, then it chooses some other buffer. | |
018ba359 | 1738 | If `pop-up-windows' is non-nil, windows can be split to do this. |
e198ba87 | 1739 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another |
ae47339f RS |
1740 | window even if BUFFER is already visible in the selected window, |
1741 | and ignore `same-window-regexps' and `same-window-buffer-names'. | |
a6dced2a | 1742 | This function returns the buffer it switched to. |
018ba359 PJ |
1743 | This uses the function `display-buffer' as a subroutine; see the documentation |
1744 | of `display-buffer' for additional customization information. | |
1745 | ||
1746 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1747 | do not put this buffer at the front of the list of recently selected ones. */) |
1748 | (buffer, other_window, norecord) | |
6d12711f | 1749 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1750 | { |
1751 | register Lisp_Object buf; | |
a25f13ae | 1752 | if (NILP (buffer)) |
773fbdb9 | 1753 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1754 | else |
7c2087ee | 1755 | { |
a25f13ae | 1756 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1757 | if (NILP (buf)) |
1758 | { | |
a25f13ae | 1759 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1760 | Fset_buffer_major_mode (buf); |
1761 | } | |
1762 | } | |
1ab256cb | 1763 | Fset_buffer (buf); |
f1321dc3 | 1764 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord); |
e8b3a22d | 1765 | return buf; |
1ab256cb RM |
1766 | } |
1767 | ||
1768 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1769 | doc: /* Return the current buffer as a Lisp object. */) |
1770 | () | |
1ab256cb RM |
1771 | { |
1772 | register Lisp_Object buf; | |
67180c6a | 1773 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1774 | return buf; |
1775 | } | |
1776 | \f | |
7ec44ec6 GM |
1777 | /* Set the current buffer to B. |
1778 | ||
1779 | We previously set windows_or_buffers_changed here to invalidate | |
1780 | global unchanged information in beg_unchanged and end_unchanged. | |
1781 | This is no longer necessary because we now compute unchanged | |
1782 | information on a buffer-basis. Every action affecting other | |
1783 | windows than the selected one requires a select_window at some | |
1784 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1785 | |
1786 | void | |
1787 | set_buffer_internal (b) | |
1788 | register struct buffer *b; | |
1789 | { | |
b5a225b4 | 1790 | if (current_buffer != b) |
7ec44ec6 | 1791 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1792 | } |
1793 | ||
1794 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1795 | This is used by redisplay. */ | |
1796 | ||
1797 | void | |
1798 | set_buffer_internal_1 (b) | |
1799 | register struct buffer *b; | |
1800 | { | |
1801 | register struct buffer *old_buf; | |
1802 | register Lisp_Object tail, valcontents; | |
1803 | Lisp_Object tem; | |
1804 | ||
b86af064 | 1805 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1806 | if (b->text->beg == NULL) |
b86af064 GM |
1807 | enlarge_buffer_text (b, 0); |
1808 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1809 | |
c7aa5005 KH |
1810 | if (current_buffer == b) |
1811 | return; | |
1812 | ||
1ab256cb RM |
1813 | old_buf = current_buffer; |
1814 | current_buffer = b; | |
1815 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1816 | ||
336cd056 RS |
1817 | if (old_buf) |
1818 | { | |
1819 | /* Put the undo list back in the base buffer, so that it appears | |
1820 | that an indirect buffer shares the undo list of its base. */ | |
1821 | if (old_buf->base_buffer) | |
1822 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1823 | ||
1824 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1825 | when it is not current, update them now. */ | |
1826 | if (! NILP (old_buf->pt_marker)) | |
1827 | { | |
1828 | Lisp_Object obuf; | |
1829 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1830 | set_marker_both (old_buf->pt_marker, obuf, |
1831 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1832 | } |
1833 | if (! NILP (old_buf->begv_marker)) | |
1834 | { | |
1835 | Lisp_Object obuf; | |
1836 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1837 | set_marker_both (old_buf->begv_marker, obuf, |
1838 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1839 | } |
1840 | if (! NILP (old_buf->zv_marker)) | |
1841 | { | |
1842 | Lisp_Object obuf; | |
1843 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1844 | set_marker_both (old_buf->zv_marker, obuf, |
1845 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1846 | } |
1847 | } | |
1848 | ||
1849 | /* Get the undo list from the base buffer, so that it appears | |
1850 | that an indirect buffer shares the undo list of its base. */ | |
1851 | if (b->base_buffer) | |
1852 | b->undo_list = b->base_buffer->undo_list; | |
1853 | ||
1854 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1855 | when it is not current, fetch them now. */ | |
1856 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1857 | { |
1858 | BUF_PT (b) = marker_position (b->pt_marker); | |
1859 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1860 | } | |
336cd056 | 1861 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1862 | { |
1863 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1864 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1865 | } | |
336cd056 | 1866 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1867 | { |
1868 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1869 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1870 | } | |
336cd056 | 1871 | |
1ab256cb RM |
1872 | /* Look down buffer's list of local Lisp variables |
1873 | to find and update any that forward into C variables. */ | |
1874 | ||
65745fad | 1875 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1876 | { |
f5c1dd0d | 1877 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1878 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1879 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1880 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1881 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1882 | /* Just reference the variable |
1883 | to cause it to become set for this buffer. */ | |
7539e11f | 1884 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1885 | } |
1886 | ||
1887 | /* Do the same with any others that were local to the previous buffer */ | |
1888 | ||
1889 | if (old_buf) | |
65745fad | 1890 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1891 | { |
f5c1dd0d | 1892 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1893 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1894 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1895 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1896 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1897 | /* Just reference the variable |
1898 | to cause it to become set for this buffer. */ | |
7539e11f | 1899 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1900 | } |
1901 | } | |
1902 | ||
336cd056 | 1903 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1904 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1905 | |
1906 | void | |
1907 | set_buffer_temp (b) | |
1908 | struct buffer *b; | |
1909 | { | |
1910 | register struct buffer *old_buf; | |
1911 | ||
1912 | if (current_buffer == b) | |
1913 | return; | |
1914 | ||
1915 | old_buf = current_buffer; | |
1916 | current_buffer = b; | |
1917 | ||
1918 | if (old_buf) | |
1919 | { | |
1920 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1921 | when it is not current, update them now. */ | |
1922 | if (! NILP (old_buf->pt_marker)) | |
1923 | { | |
1924 | Lisp_Object obuf; | |
1925 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1926 | set_marker_both (old_buf->pt_marker, obuf, |
1927 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1928 | } |
1929 | if (! NILP (old_buf->begv_marker)) | |
1930 | { | |
1931 | Lisp_Object obuf; | |
1932 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1933 | set_marker_both (old_buf->begv_marker, obuf, |
1934 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1935 | } |
1936 | if (! NILP (old_buf->zv_marker)) | |
1937 | { | |
1938 | Lisp_Object obuf; | |
1939 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1940 | set_marker_both (old_buf->zv_marker, obuf, |
1941 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1942 | } |
1943 | } | |
1944 | ||
1945 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1946 | when it is not current, fetch them now. */ | |
1947 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1948 | { |
1949 | BUF_PT (b) = marker_position (b->pt_marker); | |
1950 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1951 | } | |
336cd056 | 1952 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1953 | { |
1954 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1955 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1956 | } | |
336cd056 | 1957 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1958 | { |
1959 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1960 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1961 | } | |
336cd056 RS |
1962 | } |
1963 | ||
1ab256cb | 1964 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1965 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1966 | BUFFER may be a buffer or the name of an existing buffer. |
1967 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1968 | This function does not display the buffer, so its effect ends | |
1969 | when the current command terminates. | |
7ee72033 MB |
1970 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1971 | (buffer) | |
a25f13ae | 1972 | register Lisp_Object buffer; |
1ab256cb | 1973 | { |
a25f13ae KH |
1974 | register Lisp_Object buf; |
1975 | buf = Fget_buffer (buffer); | |
1976 | if (NILP (buf)) | |
1977 | nsberror (buffer); | |
1978 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1979 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1980 | set_buffer_internal (XBUFFER (buf)); |
1981 | return buf; | |
1ab256cb | 1982 | } |
d0628b06 RS |
1983 | |
1984 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1985 | ||
1986 | Lisp_Object | |
1987 | set_buffer_if_live (buffer) | |
1988 | Lisp_Object buffer; | |
1989 | { | |
1990 | if (! NILP (XBUFFER (buffer)->name)) | |
1991 | Fset_buffer (buffer); | |
1992 | return Qnil; | |
1993 | } | |
1ab256cb RM |
1994 | \f |
1995 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1996 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
1997 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
1998 | () | |
1ab256cb | 1999 | { |
a96b68f1 RS |
2000 | if (!NILP (current_buffer->read_only) |
2001 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2002 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2003 | return Qnil; |
2004 | } | |
2005 | ||
2006 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 2007 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
2008 | There it is the least likely candidate for `other-buffer' to return; |
2009 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
39971188 | 2010 | You can specify a buffer name as BUFFER, or an actual buffer object. |
018ba359 PJ |
2011 | If BUFFER is nil or omitted, bury the current buffer. |
2012 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
2013 | selected window if it is displayed there. */) |
2014 | (buffer) | |
a2428fa2 | 2015 | register Lisp_Object buffer; |
1ab256cb | 2016 | { |
b271272a | 2017 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 2018 | if (NILP (buffer)) |
a5611885 | 2019 | { |
c58dab63 | 2020 | Lisp_Object tem; |
a2428fa2 | 2021 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2022 | |
c58dab63 | 2023 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2024 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2025 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2026 | { |
2027 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2028 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2029 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2030 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2031 | else | |
2032 | Fdelete_window (selected_window); | |
2033 | } | |
a5611885 | 2034 | } |
1ab256cb RM |
2035 | else |
2036 | { | |
2037 | Lisp_Object buf1; | |
177c0ea7 | 2038 | |
a2428fa2 | 2039 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2040 | if (NILP (buf1)) |
a2428fa2 EN |
2041 | nsberror (buffer); |
2042 | buffer = buf1; | |
b271272a JB |
2043 | } |
2044 | ||
a1a8b28e GM |
2045 | /* Move buffer to the end of the buffer list. Do nothing if the |
2046 | buffer is killed. */ | |
2047 | if (!NILP (XBUFFER (buffer)->name)) | |
2048 | { | |
2049 | Lisp_Object aelt, link; | |
b271272a | 2050 | |
a1a8b28e GM |
2051 | aelt = Frassq (buffer, Vbuffer_alist); |
2052 | link = Fmemq (aelt, Vbuffer_alist); | |
2053 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2054 | XSETCDR (link, Qnil); |
a1a8b28e | 2055 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2056 | |
6c488ddb RS |
2057 | /* Removing BUFFER from frame-specific lists |
2058 | has the effect of putting BUFFER at the end | |
2059 | of the combined list in each frame. */ | |
2060 | frames_discard_buffer (buffer); | |
a1a8b28e | 2061 | } |
dec989eb | 2062 | |
1ab256cb RM |
2063 | return Qnil; |
2064 | } | |
2065 | \f | |
c922bc55 | 2066 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2067 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2068 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2069 | so the buffer is truly empty after this. */) |
2070 | () | |
1ab256cb RM |
2071 | { |
2072 | Fwiden (); | |
c0d9a0c3 GM |
2073 | |
2074 | del_range (BEG, Z); | |
c280bc6a | 2075 | |
1ab256cb RM |
2076 | current_buffer->last_window_start = 1; |
2077 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2078 | if future size is less than past size. Use of erase-buffer | |
2079 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2080 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2081 | return Qnil; |
2082 | } | |
2083 | ||
01136e9b | 2084 | void |
1ab256cb RM |
2085 | validate_region (b, e) |
2086 | register Lisp_Object *b, *e; | |
2087 | { | |
b7826503 PJ |
2088 | CHECK_NUMBER_COERCE_MARKER (*b); |
2089 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2090 | |
2091 | if (XINT (*b) > XINT (*e)) | |
2092 | { | |
03192067 KH |
2093 | Lisp_Object tem; |
2094 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2095 | } |
2096 | ||
2097 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2098 | && XINT (*e) <= ZV)) | |
2099 | args_out_of_range (*b, *e); | |
2100 | } | |
2101 | \f | |
b05525fa RS |
2102 | /* Advance BYTE_POS up to a character boundary |
2103 | and return the adjusted position. */ | |
2104 | ||
2105 | static int | |
2106 | advance_to_char_boundary (byte_pos) | |
2107 | int byte_pos; | |
2108 | { | |
f8449323 | 2109 | int c; |
b05525fa | 2110 | |
f8449323 RS |
2111 | if (byte_pos == BEG) |
2112 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2113 | return BEG; |
f8449323 RS |
2114 | |
2115 | c = FETCH_BYTE (byte_pos); | |
2116 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2117 | { |
1be6387d | 2118 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2119 | multibyte sequence. */ |
a9bcded1 KH |
2120 | int orig_byte_pos = byte_pos; |
2121 | ||
2122 | do | |
2123 | { | |
2124 | byte_pos--; | |
2125 | c = FETCH_BYTE (byte_pos); | |
2126 | } | |
2127 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2128 | INC_POS (byte_pos); |
a9bcded1 KH |
2129 | if (byte_pos < orig_byte_pos) |
2130 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2131 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2132 | surely advance to the correct character boundary. If C is | |
2133 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2134 | } |
2135 | ||
20773569 | 2136 | return byte_pos; |
b05525fa RS |
2137 | } |
2138 | ||
3ac81adb RS |
2139 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2140 | 1, 1, 0, | |
7ee72033 | 2141 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2142 | If FLAG is t, this makes the buffer a multibyte buffer. |
2143 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
2144 | The buffer contents remain unchanged as a sequence of bytes | |
fc1d15f6 KH |
2145 | but the contents viewed as characters do change. |
2146 | If the multibyte flag was really changed, undo information of the | |
2147 | current buffer is cleared. */) | |
7ee72033 | 2148 | (flag) |
3ac81adb RS |
2149 | Lisp_Object flag; |
2150 | { | |
65745fad | 2151 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2152 | struct buffer *other; |
458c8af4 | 2153 | int begv, zv; |
8d1203ea | 2154 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2155 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2156 | Lisp_Object old_undo = current_buffer->undo_list; |
2157 | struct gcpro gcpro1; | |
3ac81adb | 2158 | |
6e553d5e RS |
2159 | if (current_buffer->base_buffer) |
2160 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2161 | ||
70e77119 AS |
2162 | /* Do nothing if nothing actually changes. */ |
2163 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2164 | return flag; | |
2165 | ||
38babc07 KS |
2166 | GCPRO1 (old_undo); |
2167 | ||
2168 | /* Don't record these buffer changes. We will put a special undo entry | |
2169 | instead. */ | |
2170 | current_buffer->undo_list = Qt; | |
b05525fa | 2171 | |
3ac81adb RS |
2172 | /* If the cached position is for this buffer, clear it out. */ |
2173 | clear_charpos_cache (current_buffer); | |
2174 | ||
458c8af4 KH |
2175 | if (NILP (flag)) |
2176 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2177 | else | |
2178 | begv = BEGV, zv = ZV; | |
2179 | ||
a9bcded1 KH |
2180 | if (narrowed) |
2181 | Fwiden (); | |
2182 | ||
3ac81adb RS |
2183 | if (NILP (flag)) |
2184 | { | |
a9bcded1 KH |
2185 | int pos, stop; |
2186 | unsigned char *p; | |
2187 | ||
3ac81adb RS |
2188 | /* Do this first, so it can use CHAR_TO_BYTE |
2189 | to calculate the old correspondences. */ | |
2190 | set_intervals_multibyte (0); | |
2191 | ||
2192 | current_buffer->enable_multibyte_characters = Qnil; | |
2193 | ||
2194 | Z = Z_BYTE; | |
2195 | BEGV = BEGV_BYTE; | |
2196 | ZV = ZV_BYTE; | |
2197 | GPT = GPT_BYTE; | |
2198 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2199 | ||
60ebfdf3 | 2200 | |
65745fad SM |
2201 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2202 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2203 | |
2204 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2205 | pos = BEG; | |
2206 | stop = GPT; | |
2207 | p = BEG_ADDR; | |
2208 | while (1) | |
2209 | { | |
2210 | int c, bytes; | |
2211 | ||
2212 | if (pos == stop) | |
2213 | { | |
2214 | if (pos == Z) | |
2215 | break; | |
2216 | p = GAP_END_ADDR; | |
2217 | stop = Z; | |
2218 | } | |
2219 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2220 | p += bytes, pos += bytes; | |
2221 | else | |
2222 | { | |
2223 | c = STRING_CHAR (p, stop - pos); | |
2224 | /* Delete all bytes for this 8-bit character but the | |
2225 | last one, and change the last one to the charcter | |
2226 | code. */ | |
2227 | bytes--; | |
2228 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2229 | p = GAP_END_ADDR; | |
2230 | *p++ = c; | |
2231 | pos++; | |
2232 | if (begv > pos) | |
2233 | begv -= bytes; | |
2234 | if (zv > pos) | |
2235 | zv -= bytes; | |
2236 | stop = Z; | |
2237 | } | |
2238 | } | |
2239 | if (narrowed) | |
2240 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2241 | } |
2242 | else | |
2243 | { | |
a9bcded1 KH |
2244 | int pt = PT; |
2245 | int pos, stop; | |
2246 | unsigned char *p; | |
2247 | ||
673c57d2 | 2248 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2249 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2250 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2251 | |
2252 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2253 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2254 | { | |
2255 | unsigned char *p = GPT_ADDR - 1; | |
2256 | ||
2257 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2258 | if (BASE_LEADING_CODE_P (*p)) | |
2259 | { | |
2260 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2261 | ||
2262 | move_gap_both (new_gpt, new_gpt); | |
2263 | } | |
2264 | } | |
2265 | ||
a9bcded1 KH |
2266 | /* Make the buffer contents valid as multibyte by converting |
2267 | 8-bit characters to multibyte form. */ | |
2268 | pos = BEG; | |
2269 | stop = GPT; | |
2270 | p = BEG_ADDR; | |
2271 | while (1) | |
2272 | { | |
2273 | int bytes; | |
2274 | ||
2275 | if (pos == stop) | |
2276 | { | |
2277 | if (pos == Z) | |
2278 | break; | |
2279 | p = GAP_END_ADDR; | |
2280 | stop = Z; | |
2281 | } | |
177c0ea7 | 2282 | |
a9bcded1 KH |
2283 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) |
2284 | p += bytes, pos += bytes; | |
2285 | else | |
2286 | { | |
2287 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2288 | ||
2289 | bytes = CHAR_STRING (*p, tmp); | |
2290 | *p = tmp[0]; | |
2291 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2292 | bytes--; | |
2293 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2294 | /* Now the gap is after the just inserted data. */ | |
2295 | pos = GPT; | |
2296 | p = GAP_END_ADDR; | |
2297 | if (pos <= begv) | |
2298 | begv += bytes; | |
2299 | if (pos <= zv) | |
2300 | zv += bytes; | |
2301 | if (pos <= pt) | |
2302 | pt += bytes; | |
2303 | stop = Z; | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | if (pt != PT) | |
2308 | TEMP_SET_PT (pt); | |
2309 | ||
2310 | if (narrowed) | |
2311 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2312 | ||
3ac81adb RS |
2313 | /* Do this first, so that chars_in_text asks the right question. |
2314 | set_intervals_multibyte needs it too. */ | |
2315 | current_buffer->enable_multibyte_characters = Qt; | |
2316 | ||
b05525fa | 2317 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2318 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2319 | |
673c57d2 | 2320 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2321 | |
2322 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2323 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2324 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2325 | else |
2326 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2327 | |
2328 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2329 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2330 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2331 | else |
2332 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2333 | |
2334 | { | |
2335 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2336 | int pt; | |
2337 | ||
2338 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2339 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2340 | else |
2341 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2342 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2343 | } | |
3ac81adb RS |
2344 | |
2345 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2346 | |
2347 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2348 | getting confused by the markers that have not yet been updated. | |
2349 | It is also a signal that it should never create a marker. */ | |
65745fad | 2350 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2351 | |
65745fad | 2352 | for (; tail; tail = tail->next) |
3ac81adb | 2353 | { |
65745fad SM |
2354 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2355 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2356 | } |
b69f9797 RS |
2357 | |
2358 | /* Make sure no markers were put on the chain | |
2359 | while the chain value was incorrect. */ | |
65745fad | 2360 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2361 | abort (); |
2362 | ||
3ac81adb RS |
2363 | BUF_MARKERS (current_buffer) = markers; |
2364 | ||
2365 | /* Do this last, so it can calculate the new correspondences | |
2366 | between chars and bytes. */ | |
2367 | set_intervals_multibyte (1); | |
2368 | } | |
2369 | ||
38babc07 KS |
2370 | if (!EQ (old_undo, Qt)) |
2371 | { | |
2372 | /* Represent all the above changes by a special undo entry. */ | |
2373 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2374 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2375 | intern ("set-buffer-multibyte"), | |
2376 | NILP (flag) ? Qt : Qnil), | |
2377 | old_undo); | |
38babc07 KS |
2378 | } |
2379 | ||
2380 | UNGCPRO; | |
a9bcded1 | 2381 | |
724b203f GM |
2382 | /* Changing the multibyteness of a buffer means that all windows |
2383 | showing that buffer must be updated thoroughly. */ | |
2384 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2385 | ++windows_or_buffers_changed; | |
2386 | ||
abc9d959 RS |
2387 | /* Copy this buffer's new multibyte status |
2388 | into all of its indirect buffers. */ | |
2389 | for (other = all_buffers; other; other = other->next) | |
2390 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2391 | { |
2392 | other->enable_multibyte_characters | |
2393 | = current_buffer->enable_multibyte_characters; | |
2394 | other->prevent_redisplay_optimizations_p = 1; | |
2395 | } | |
abc9d959 | 2396 | |
ed00559d KH |
2397 | /* Restore the modifiedness of the buffer. */ |
2398 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2399 | Fset_buffer_modified_p (Qnil); | |
2400 | ||
2a2b50a9 | 2401 | #ifdef subprocesses |
172f9454 KH |
2402 | /* Update coding systems of this buffer's process (if any). */ |
2403 | { | |
2404 | Lisp_Object process; | |
2405 | ||
2406 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2407 | if (PROCESSP (process)) | |
2408 | setup_process_coding_systems (process); | |
2409 | } | |
2a2b50a9 | 2410 | #endif /* subprocesses */ |
172f9454 | 2411 | |
3ac81adb RS |
2412 | return flag; |
2413 | } | |
2414 | \f | |
1ab256cb | 2415 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2416 | 0, 0, 0, |
7ee72033 | 2417 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2418 | Most local variable bindings are eliminated so that the default values |
2419 | become effective once more. Also, the syntax table is set from | |
2420 | `standard-syntax-table', the local keymap is set to nil, | |
2421 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2422 | This function also forces redisplay of the mode line. | |
2423 | ||
2424 | Every function to select a new major mode starts by | |
2425 | calling this function. | |
2426 | ||
2427 | As a special exception, local variables whose names have | |
2428 | a non-nil `permanent-local' property are not eliminated by this function. | |
2429 | ||
2430 | The first thing this function does is run | |
7ee72033 MB |
2431 | the normal hook `change-major-mode-hook'. */) |
2432 | () | |
1ab256cb RM |
2433 | { |
2434 | register Lisp_Object alist, sym, tem; | |
2435 | Lisp_Object oalist; | |
7410477a | 2436 | |
fd186f07 | 2437 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2438 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb RM |
2439 | oalist = current_buffer->local_var_alist; |
2440 | ||
2f3f993b RS |
2441 | /* Make sure none of the bindings in oalist |
2442 | remain swapped in, in their symbols. */ | |
1ab256cb | 2443 | |
2f3f993b | 2444 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2445 | |
2446 | /* Actually eliminate all local bindings of this buffer. */ | |
2447 | ||
13de9290 | 2448 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2449 | |
1ab256cb RM |
2450 | /* Any which are supposed to be permanent, |
2451 | make local again, with the same values they had. */ | |
177c0ea7 | 2452 | |
7539e11f | 2453 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2454 | { |
7539e11f | 2455 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2456 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2457 | if (! NILP (tem)) |
01050cb5 RM |
2458 | { |
2459 | Fmake_local_variable (sym); | |
7539e11f | 2460 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2461 | } |
1ab256cb RM |
2462 | } |
2463 | ||
2464 | /* Force mode-line redisplay. Useful here because all major mode | |
2465 | commands call this function. */ | |
2466 | update_mode_lines++; | |
2467 | ||
2468 | return Qnil; | |
2469 | } | |
2f3f993b RS |
2470 | |
2471 | /* Make sure no local variables remain set up with buffer B | |
2472 | for their current values. */ | |
2473 | ||
2474 | static void | |
2475 | swap_out_buffer_local_variables (b) | |
2476 | struct buffer *b; | |
2477 | { | |
2478 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2479 | ||
2480 | XSETBUFFER (buffer, b); | |
2481 | oalist = b->local_var_alist; | |
2482 | ||
7539e11f | 2483 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2484 | { |
7539e11f | 2485 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2486 | |
2487 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2488 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2489 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2490 | { |
2491 | /* Symbol is set up for this buffer's old local value. | |
2492 | Set it up for the current buffer with the default value. */ | |
2493 | ||
f5c1dd0d | 2494 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2495 | /* Store the symbol's current value into the alist entry |
2496 | it is currently set up for. This is so that, if the | |
2497 | local is marked permanent, and we make it local again | |
2498 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2499 | XSETCDR (XCAR (tem), |
2500 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2501 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2502 | XSETCAR (tem, tem); |
2f3f993b | 2503 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2504 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2505 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2506 | store_symval_forwarding (sym, |
f5c1dd0d | 2507 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2508 | XCDR (tem), NULL); |
2f3f993b RS |
2509 | } |
2510 | } | |
2511 | } | |
1ab256cb | 2512 | \f |
2eec3b4e | 2513 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2514 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2515 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2516 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2517 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2518 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2519 | or where an overlay starts which ends at or after POS; |
624d2678 | 2520 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2521 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2522 | |
2523 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2524 | when this function is called. |
2525 | ||
2526 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2527 | If EXTEND is zero, we never extend the vector, | |
2528 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2529 | But we still return the total number of overlays. |
2530 | ||
2531 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2532 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2533 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2534 | |
2535 | int | |
ac869cf7 | 2536 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2537 | EMACS_INT pos; |
61d54cd5 | 2538 | int extend; |
2eec3b4e RS |
2539 | Lisp_Object **vec_ptr; |
2540 | int *len_ptr; | |
2541 | int *next_ptr; | |
239c932b | 2542 | int *prev_ptr; |
ac869cf7 | 2543 | int change_req; |
1ab256cb | 2544 | { |
2410d73a SM |
2545 | Lisp_Object overlay, start, end; |
2546 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2547 | int idx = 0; |
2548 | int len = *len_ptr; | |
2549 | Lisp_Object *vec = *vec_ptr; | |
2550 | int next = ZV; | |
239c932b | 2551 | int prev = BEGV; |
61d54cd5 RS |
2552 | int inhibit_storing = 0; |
2553 | ||
2410d73a | 2554 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2555 | { |
239c932b | 2556 | int startpos, endpos; |
52f8ec73 | 2557 | |
2410d73a | 2558 | XSETMISC (overlay, tail); |
1ab256cb | 2559 | |
2eec3b4e RS |
2560 | start = OVERLAY_START (overlay); |
2561 | end = OVERLAY_END (overlay); | |
239c932b RS |
2562 | endpos = OVERLAY_POSITION (end); |
2563 | if (endpos < pos) | |
2564 | { | |
2565 | if (prev < endpos) | |
2566 | prev = endpos; | |
2567 | break; | |
2568 | } | |
413e06a4 RS |
2569 | startpos = OVERLAY_POSITION (start); |
2570 | /* This one ends at or after POS | |
daa1c109 | 2571 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2572 | if (prev < startpos && startpos < pos) |
2573 | prev = startpos; | |
239c932b RS |
2574 | if (endpos == pos) |
2575 | continue; | |
2eec3b4e RS |
2576 | if (startpos <= pos) |
2577 | { | |
2578 | if (idx == len) | |
2579 | { | |
61d54cd5 RS |
2580 | /* The supplied vector is full. |
2581 | Either make it bigger, or don't store any more in it. */ | |
2582 | if (extend) | |
2583 | { | |
0552666b GM |
2584 | /* Make it work with an initial len == 0. */ |
2585 | len *= 2; | |
2586 | if (len == 0) | |
2587 | len = 4; | |
2588 | *len_ptr = len; | |
61d54cd5 RS |
2589 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2590 | *vec_ptr = vec; | |
2591 | } | |
2592 | else | |
2593 | inhibit_storing = 1; | |
2eec3b4e | 2594 | } |
61d54cd5 RS |
2595 | |
2596 | if (!inhibit_storing) | |
2597 | vec[idx] = overlay; | |
2598 | /* Keep counting overlays even if we can't return them all. */ | |
2599 | idx++; | |
2eec3b4e RS |
2600 | } |
2601 | else if (startpos < next) | |
2602 | next = startpos; | |
2603 | } | |
2604 | ||
2410d73a | 2605 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2606 | { |
239c932b | 2607 | int startpos, endpos; |
52f8ec73 | 2608 | |
2410d73a | 2609 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2610 | |
2611 | start = OVERLAY_START (overlay); | |
2612 | end = OVERLAY_END (overlay); | |
2613 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2614 | if (pos < startpos) |
2eec3b4e RS |
2615 | { |
2616 | if (startpos < next) | |
2617 | next = startpos; | |
2618 | break; | |
2619 | } | |
239c932b RS |
2620 | endpos = OVERLAY_POSITION (end); |
2621 | if (pos < endpos) | |
2eec3b4e RS |
2622 | { |
2623 | if (idx == len) | |
2624 | { | |
61d54cd5 RS |
2625 | if (extend) |
2626 | { | |
4b0e44fc RS |
2627 | /* Make it work with an initial len == 0. */ |
2628 | len *= 2; | |
0552666b | 2629 | if (len == 0) |
4b0e44fc RS |
2630 | len = 4; |
2631 | *len_ptr = len; | |
61d54cd5 RS |
2632 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2633 | *vec_ptr = vec; | |
2634 | } | |
2635 | else | |
2636 | inhibit_storing = 1; | |
2eec3b4e | 2637 | } |
61d54cd5 RS |
2638 | |
2639 | if (!inhibit_storing) | |
2640 | vec[idx] = overlay; | |
2641 | idx++; | |
413e06a4 RS |
2642 | |
2643 | if (startpos < pos && startpos > prev) | |
2644 | prev = startpos; | |
2eec3b4e | 2645 | } |
239c932b RS |
2646 | else if (endpos < pos && endpos > prev) |
2647 | prev = endpos; | |
1d5f4c1d MB |
2648 | else if (endpos == pos && startpos > prev |
2649 | && (!change_req || startpos < pos)) | |
413e06a4 | 2650 | prev = startpos; |
1ab256cb RM |
2651 | } |
2652 | ||
239c932b RS |
2653 | if (next_ptr) |
2654 | *next_ptr = next; | |
2655 | if (prev_ptr) | |
2656 | *prev_ptr = prev; | |
2eec3b4e RS |
2657 | return idx; |
2658 | } | |
74514898 RS |
2659 | \f |
2660 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2661 | or are empty at BEG. |
2662 | ||
177c0ea7 | 2663 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2664 | Store in *LEN_PTR the size allocated for the vector. |
2665 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2666 | or ZV if there are no more overlays. | |
2667 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2668 | or BEGV if there are no previous overlays. | |
2669 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2670 | ||
2671 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2672 | when this function is called. | |
2673 | ||
2674 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2675 | If EXTEND is zero, we never extend the vector, | |
2676 | and we store only as many overlays as will fit. | |
2677 | But we still return the total number of overlays. */ | |
2678 | ||
a9b9a780 | 2679 | static int |
74514898 RS |
2680 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2681 | int beg, end; | |
2682 | int extend; | |
2683 | Lisp_Object **vec_ptr; | |
2684 | int *len_ptr; | |
2685 | int *next_ptr; | |
2686 | int *prev_ptr; | |
2687 | { | |
2410d73a SM |
2688 | Lisp_Object overlay, ostart, oend; |
2689 | struct Lisp_Overlay *tail; | |
74514898 RS |
2690 | int idx = 0; |
2691 | int len = *len_ptr; | |
2692 | Lisp_Object *vec = *vec_ptr; | |
2693 | int next = ZV; | |
2694 | int prev = BEGV; | |
2695 | int inhibit_storing = 0; | |
2696 | ||
2410d73a | 2697 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2698 | { |
2699 | int startpos, endpos; | |
2700 | ||
2410d73a | 2701 | XSETMISC (overlay, tail); |
74514898 RS |
2702 | |
2703 | ostart = OVERLAY_START (overlay); | |
2704 | oend = OVERLAY_END (overlay); | |
2705 | endpos = OVERLAY_POSITION (oend); | |
2706 | if (endpos < beg) | |
2707 | { | |
2708 | if (prev < endpos) | |
2709 | prev = endpos; | |
2710 | break; | |
2711 | } | |
2712 | startpos = OVERLAY_POSITION (ostart); | |
2713 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2714 | or is empty at the start of the range. */ |
74514898 | 2715 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2716 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2717 | { |
2718 | if (idx == len) | |
2719 | { | |
2720 | /* The supplied vector is full. | |
2721 | Either make it bigger, or don't store any more in it. */ | |
2722 | if (extend) | |
2723 | { | |
4b0e44fc RS |
2724 | /* Make it work with an initial len == 0. */ |
2725 | len *= 2; | |
2726 | if (len == 0) | |
2727 | len = 4; | |
2728 | *len_ptr = len; | |
74514898 RS |
2729 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2730 | *vec_ptr = vec; | |
2731 | } | |
2732 | else | |
2733 | inhibit_storing = 1; | |
2734 | } | |
2735 | ||
2736 | if (!inhibit_storing) | |
2737 | vec[idx] = overlay; | |
2738 | /* Keep counting overlays even if we can't return them all. */ | |
2739 | idx++; | |
2740 | } | |
2741 | else if (startpos < next) | |
2742 | next = startpos; | |
2743 | } | |
2744 | ||
2410d73a | 2745 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2746 | { |
2747 | int startpos, endpos; | |
2748 | ||
2410d73a | 2749 | XSETMISC (overlay, tail); |
74514898 RS |
2750 | |
2751 | ostart = OVERLAY_START (overlay); | |
2752 | oend = OVERLAY_END (overlay); | |
2753 | startpos = OVERLAY_POSITION (ostart); | |
2754 | if (end < startpos) | |
2755 | { | |
2756 | if (startpos < next) | |
2757 | next = startpos; | |
2758 | break; | |
2759 | } | |
2760 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2761 | /* Count an interval if it either overlaps the range |
2762 | or is empty at the start of the range. */ | |
74514898 | 2763 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2764 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2765 | { |
2766 | if (idx == len) | |
2767 | { | |
2768 | if (extend) | |
2769 | { | |
4b0e44fc RS |
2770 | /* Make it work with an initial len == 0. */ |
2771 | len *= 2; | |
2772 | if (len == 0) | |
2773 | len = 4; | |
2774 | *len_ptr = len; | |
74514898 RS |
2775 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2776 | *vec_ptr = vec; | |
2777 | } | |
2778 | else | |
2779 | inhibit_storing = 1; | |
2780 | } | |
2781 | ||
2782 | if (!inhibit_storing) | |
2783 | vec[idx] = overlay; | |
2784 | idx++; | |
2785 | } | |
2786 | else if (endpos < beg && endpos > prev) | |
2787 | prev = endpos; | |
2788 | } | |
fc04fa47 | 2789 | |
74514898 RS |
2790 | if (next_ptr) |
2791 | *next_ptr = next; | |
2792 | if (prev_ptr) | |
2793 | *prev_ptr = prev; | |
2794 | return idx; | |
2795 | } | |
09a22085 GM |
2796 | |
2797 | ||
2798 | /* Return non-zero if there exists an overlay with a non-nil | |
2799 | `mouse-face' property overlapping OVERLAY. */ | |
2800 | ||
2801 | int | |
2802 | mouse_face_overlay_overlaps (overlay) | |
2803 | Lisp_Object overlay; | |
2804 | { | |
2805 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2806 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2807 | int n, i, size; |
09a22085 | 2808 | Lisp_Object *v, tem; |
177c0ea7 | 2809 | |
bfd8410f GM |
2810 | size = 10; |
2811 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2812 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2813 | if (n > size) | |
09a22085 | 2814 | { |
09a22085 GM |
2815 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2816 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2817 | } | |
2818 | ||
2819 | for (i = 0; i < n; ++i) | |
2820 | if (!EQ (v[i], overlay) | |
2821 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2822 | !NILP (tem))) | |
2823 | break; | |
2824 | ||
2825 | return i < n; | |
2826 | } | |
2827 | ||
2828 | ||
74514898 | 2829 | \f |
fc04fa47 KH |
2830 | /* Fast function to just test if we're at an overlay boundary. */ |
2831 | int | |
2832 | overlay_touches_p (pos) | |
2833 | int pos; | |
2834 | { | |
2410d73a SM |
2835 | Lisp_Object overlay; |
2836 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2837 | |
2410d73a | 2838 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2839 | { |
2840 | int endpos; | |
2841 | ||
2410d73a | 2842 | XSETMISC (overlay ,tail); |
fc04fa47 KH |
2843 | if (!GC_OVERLAYP (overlay)) |
2844 | abort (); | |
2845 | ||
2846 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2847 | if (endpos < pos) | |
2848 | break; | |
2849 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2850 | return 1; | |
2851 | } | |
2852 | ||
2410d73a | 2853 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2854 | { |
2855 | int startpos; | |
2856 | ||
2410d73a | 2857 | XSETMISC (overlay, tail); |
fc04fa47 KH |
2858 | if (!GC_OVERLAYP (overlay)) |
2859 | abort (); | |
2860 | ||
2861 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2862 | if (pos < startpos) | |
2863 | break; | |
2864 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2865 | return 1; | |
2866 | } | |
2867 | return 0; | |
2868 | } | |
2eec3b4e | 2869 | \f |
5985d248 KH |
2870 | struct sortvec |
2871 | { | |
2872 | Lisp_Object overlay; | |
2873 | int beg, end; | |
2874 | int priority; | |
2875 | }; | |
2876 | ||
2877 | static int | |
dfcf069d AS |
2878 | compare_overlays (v1, v2) |
2879 | const void *v1, *v2; | |
5985d248 | 2880 | { |
dfcf069d AS |
2881 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2882 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2883 | if (s1->priority != s2->priority) |
2884 | return s1->priority - s2->priority; | |
2885 | if (s1->beg != s2->beg) | |
2886 | return s1->beg - s2->beg; | |
2887 | if (s1->end != s2->end) | |
2888 | return s2->end - s1->end; | |
2889 | return 0; | |
2890 | } | |
2891 | ||
2892 | /* Sort an array of overlays by priority. The array is modified in place. | |
2893 | The return value is the new size; this may be smaller than the original | |
2894 | size if some of the overlays were invalid or were window-specific. */ | |
2895 | int | |
2896 | sort_overlays (overlay_vec, noverlays, w) | |
2897 | Lisp_Object *overlay_vec; | |
2898 | int noverlays; | |
2899 | struct window *w; | |
2900 | { | |
2901 | int i, j; | |
2902 | struct sortvec *sortvec; | |
2903 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2904 | ||
2905 | /* Put the valid and relevant overlays into sortvec. */ | |
2906 | ||
2907 | for (i = 0, j = 0; i < noverlays; i++) | |
2908 | { | |
0fa767e7 | 2909 | Lisp_Object tem; |
c99fc30f | 2910 | Lisp_Object overlay; |
5985d248 | 2911 | |
c99fc30f | 2912 | overlay = overlay_vec[i]; |
5985d248 KH |
2913 | if (OVERLAY_VALID (overlay) |
2914 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2915 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2916 | { | |
0fa767e7 KH |
2917 | /* If we're interested in a specific window, then ignore |
2918 | overlays that are limited to some other window. */ | |
2919 | if (w) | |
5985d248 | 2920 | { |
0fa767e7 KH |
2921 | Lisp_Object window; |
2922 | ||
2923 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2924 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2925 | continue; |
5985d248 | 2926 | } |
0fa767e7 KH |
2927 | |
2928 | /* This overlay is good and counts: put it into sortvec. */ | |
2929 | sortvec[j].overlay = overlay; | |
2930 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2931 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2932 | tem = Foverlay_get (overlay, Qpriority); | |
2933 | if (INTEGERP (tem)) | |
2934 | sortvec[j].priority = XINT (tem); | |
2935 | else | |
2936 | sortvec[j].priority = 0; | |
2937 | j++; | |
5985d248 KH |
2938 | } |
2939 | } | |
2940 | noverlays = j; | |
2941 | ||
2942 | /* Sort the overlays into the proper order: increasing priority. */ | |
2943 | ||
2944 | if (noverlays > 1) | |
2945 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2946 | ||
2947 | for (i = 0; i < noverlays; i++) | |
2948 | overlay_vec[i] = sortvec[i].overlay; | |
2949 | return (noverlays); | |
2950 | } | |
2951 | \f | |
bbbe9545 KH |
2952 | struct sortstr |
2953 | { | |
cb26008f | 2954 | Lisp_Object string, string2; |
bbbe9545 KH |
2955 | int size; |
2956 | int priority; | |
2957 | }; | |
2958 | ||
e8185fa8 KH |
2959 | struct sortstrlist |
2960 | { | |
2961 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2962 | int size; /* Allocated length of that array. */ | |
2963 | int used; /* How much of the array is currently in use. */ | |
2964 | int bytes; /* Total length of the strings in buf. */ | |
2965 | }; | |
2966 | ||
2967 | /* Buffers for storing information about the overlays touching a given | |
2968 | position. These could be automatic variables in overlay_strings, but | |
2969 | it's more efficient to hold onto the memory instead of repeatedly | |
2970 | allocating and freeing it. */ | |
2971 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2972 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2973 | |
2974 | /* Allocated length of overlay_str_buf. */ | |
2975 | static int overlay_str_len; | |
2976 | ||
bbbe9545 KH |
2977 | /* A comparison function suitable for passing to qsort. */ |
2978 | static int | |
2979 | cmp_for_strings (as1, as2) | |
2980 | char *as1, *as2; | |
2981 | { | |
2982 | struct sortstr *s1 = (struct sortstr *)as1; | |
2983 | struct sortstr *s2 = (struct sortstr *)as2; | |
2984 | if (s1->size != s2->size) | |
2985 | return s2->size - s1->size; | |
2986 | if (s1->priority != s2->priority) | |
2987 | return s1->priority - s2->priority; | |
2988 | return 0; | |
2989 | } | |
2990 | ||
e8185fa8 | 2991 | static void |
cb26008f | 2992 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2993 | struct sortstrlist *ssl; |
cb26008f | 2994 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2995 | int size; |
2996 | { | |
43d27a72 RS |
2997 | int nbytes; |
2998 | ||
e8185fa8 KH |
2999 | if (ssl->used == ssl->size) |
3000 | { | |
3001 | if (ssl->buf) | |
3002 | ssl->size *= 2; | |
3003 | else | |
3004 | ssl->size = 5; | |
3005 | ssl->buf = ((struct sortstr *) | |
3006 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3007 | } | |
3008 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3009 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3010 | ssl->buf[ssl->used].size = size; |
3011 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3012 | ssl->used++; | |
43d27a72 RS |
3013 | |
3014 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3015 | nbytes = SCHARS (str); |
43d27a72 | 3016 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3017 | nbytes = count_size_as_multibyte (SDATA (str), |
3018 | SBYTES (str)); | |
43d27a72 | 3019 | else |
d5db4077 | 3020 | nbytes = SBYTES (str); |
43d27a72 RS |
3021 | |
3022 | ssl->bytes += nbytes; | |
3023 | ||
cb26008f | 3024 | if (STRINGP (str2)) |
43d27a72 RS |
3025 | { |
3026 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3027 | nbytes = SCHARS (str2); |
43d27a72 | 3028 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3029 | nbytes = count_size_as_multibyte (SDATA (str2), |
3030 | SBYTES (str2)); | |
43d27a72 | 3031 | else |
d5db4077 | 3032 | nbytes = SBYTES (str2); |
43d27a72 RS |
3033 | |
3034 | ssl->bytes += nbytes; | |
3035 | } | |
e8185fa8 | 3036 | } |
bbbe9545 KH |
3037 | |
3038 | /* Return the concatenation of the strings associated with overlays that | |
3039 | begin or end at POS, ignoring overlays that are specific to a window | |
3040 | other than W. The strings are concatenated in the appropriate order: | |
3041 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3042 | lower. Normally all of the after-strings come first, but zero-sized |
3043 | overlays have their after-strings ride along with the before-strings | |
3044 | because it would look strange to print them inside-out. | |
3045 | ||
3046 | Returns the string length, and stores the contents indirectly through | |
3047 | PSTR, if that variable is non-null. The string may be overwritten by | |
3048 | subsequent calls. */ | |
6b5d3b89 | 3049 | |
bbbe9545 KH |
3050 | int |
3051 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3052 | EMACS_INT pos; |
bbbe9545 | 3053 | struct window *w; |
6b5d3b89 | 3054 | unsigned char **pstr; |
bbbe9545 | 3055 | { |
2410d73a SM |
3056 | Lisp_Object overlay, window, str; |
3057 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3058 | int startpos, endpos; |
43d27a72 | 3059 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3060 | |
e8185fa8 KH |
3061 | overlay_heads.used = overlay_heads.bytes = 0; |
3062 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3063 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3064 | { |
2410d73a | 3065 | XSETMISC (overlay, ov); |
c2d5b10f | 3066 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3067 | |
3068 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3069 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3070 | if (endpos < pos) | |
3071 | break; | |
3072 | if (endpos != pos && startpos != pos) | |
3073 | continue; | |
3074 | window = Foverlay_get (overlay, Qwindow); | |
3075 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3076 | continue; | |
e8185fa8 KH |
3077 | if (startpos == pos |
3078 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3079 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3080 | (startpos == endpos |
3081 | ? Foverlay_get (overlay, Qafter_string) | |
3082 | : Qnil), | |
3083 | Foverlay_get (overlay, Qpriority), | |
3084 | endpos - startpos); | |
3085 | else if (endpos == pos | |
3086 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3087 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3088 | Foverlay_get (overlay, Qpriority), |
3089 | endpos - startpos); | |
bbbe9545 | 3090 | } |
2410d73a | 3091 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3092 | { |
2410d73a SM |
3093 | XSETMISC (overlay, ov); |
3094 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3095 | |
3096 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3097 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3098 | if (startpos > pos) | |
3099 | break; | |
e8185fa8 KH |
3100 | if (endpos != pos && startpos != pos) |
3101 | continue; | |
3102 | window = Foverlay_get (overlay, Qwindow); | |
3103 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3104 | continue; | |
e8185fa8 KH |
3105 | if (startpos == pos |
3106 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3107 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3108 | (startpos == endpos |
3109 | ? Foverlay_get (overlay, Qafter_string) | |
3110 | : Qnil), | |
3111 | Foverlay_get (overlay, Qpriority), | |
3112 | endpos - startpos); | |
3113 | else if (endpos == pos | |
3114 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3115 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3116 | Foverlay_get (overlay, Qpriority), |
3117 | endpos - startpos); | |
bbbe9545 | 3118 | } |
e8185fa8 KH |
3119 | if (overlay_tails.used > 1) |
3120 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3121 | cmp_for_strings); | |
3122 | if (overlay_heads.used > 1) | |
3123 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3124 | cmp_for_strings); | |
3125 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3126 | { |
e8185fa8 | 3127 | Lisp_Object tem; |
bbbe9545 | 3128 | int i; |
9f4d7cde | 3129 | unsigned char *p; |
e8185fa8 | 3130 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3131 | |
3132 | if (total > overlay_str_len) | |
9f4d7cde RS |
3133 | { |
3134 | overlay_str_len = total; | |
3135 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3136 | total); | |
3137 | } | |
bbbe9545 | 3138 | p = overlay_str_buf; |
e8185fa8 | 3139 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3140 | { |
43d27a72 | 3141 | int nbytes; |
e8185fa8 | 3142 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3143 | nbytes = copy_text (SDATA (tem), p, |
3144 | SBYTES (tem), | |
43d27a72 RS |
3145 | STRING_MULTIBYTE (tem), multibyte); |
3146 | p += nbytes; | |
bbbe9545 | 3147 | } |
e8185fa8 | 3148 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3149 | { |
43d27a72 | 3150 | int nbytes; |
e8185fa8 | 3151 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3152 | nbytes = copy_text (SDATA (tem), p, |
3153 | SBYTES (tem), | |
43d27a72 RS |
3154 | STRING_MULTIBYTE (tem), multibyte); |
3155 | p += nbytes; | |
cb26008f KH |
3156 | tem = overlay_heads.buf[i].string2; |
3157 | if (STRINGP (tem)) | |
3158 | { | |
d5db4077 KR |
3159 | nbytes = copy_text (SDATA (tem), p, |
3160 | SBYTES (tem), | |
43d27a72 RS |
3161 | STRING_MULTIBYTE (tem), multibyte); |
3162 | p += nbytes; | |
cb26008f | 3163 | } |
bbbe9545 | 3164 | } |
cb26008f KH |
3165 | if (p != overlay_str_buf + total) |
3166 | abort (); | |
bbbe9545 KH |
3167 | if (pstr) |
3168 | *pstr = overlay_str_buf; | |
e8185fa8 | 3169 | return total; |
bbbe9545 | 3170 | } |
e8185fa8 | 3171 | return 0; |
bbbe9545 KH |
3172 | } |
3173 | \f | |
5c4f68f1 | 3174 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3175 | |
2eec3b4e | 3176 | void |
5c4f68f1 JB |
3177 | recenter_overlay_lists (buf, pos) |
3178 | struct buffer *buf; | |
c2d5b10f | 3179 | EMACS_INT pos; |
2eec3b4e | 3180 | { |
2410d73a SM |
3181 | Lisp_Object overlay, beg, end; |
3182 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3183 | |
3184 | /* See if anything in overlays_before should move to overlays_after. */ | |
3185 | ||
3186 | /* We don't strictly need prev in this loop; it should always be nil. | |
3187 | But we use it for symmetry and in case that should cease to be true | |
3188 | with some future change. */ | |
2410d73a SM |
3189 | prev = NULL; |
3190 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3191 | { |
2410d73a SM |
3192 | next = tail->next; |
3193 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3194 | |
3195 | /* If the overlay is not valid, get rid of it. */ | |
3196 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3197 | #if 1 |
3198 | abort (); | |
3199 | #else | |
2eec3b4e RS |
3200 | { |
3201 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3202 | if (!NILP (prev)) | |
7539e11f | 3203 | XCDR (prev) = next; |
2eec3b4e | 3204 | else |
5c4f68f1 | 3205 | buf->overlays_before = next; |
2eec3b4e RS |
3206 | tail = prev; |
3207 | continue; | |
3208 | } | |
52f8ec73 | 3209 | #endif |
1ab256cb | 3210 | |
2eec3b4e RS |
3211 | beg = OVERLAY_START (overlay); |
3212 | end = OVERLAY_END (overlay); | |
1ab256cb | 3213 | |
2eec3b4e | 3214 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3215 | { |
2eec3b4e RS |
3216 | /* OVERLAY needs to be moved. */ |
3217 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3218 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3219 | |
3220 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3221 | if (prev) |
3222 | prev->next = next; | |
2eec3b4e | 3223 | else |
5c4f68f1 | 3224 | buf->overlays_before = next; |
2eec3b4e RS |
3225 | |
3226 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3227 | other_prev = NULL; |
3228 | for (other = buf->overlays_after; other; | |
3229 | other_prev = other, other = other->next) | |
1ab256cb | 3230 | { |
6af718a4 | 3231 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3232 | |
2410d73a SM |
3233 | XSETMISC (otheroverlay, other); |
3234 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3235 | |
3236 | otherbeg = OVERLAY_START (otheroverlay); | |
3237 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3238 | break; | |
1ab256cb | 3239 | } |
2eec3b4e RS |
3240 | |
3241 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3242 | tail->next = other; |
3243 | if (other_prev) | |
3244 | other_prev->next = tail; | |
1ab256cb | 3245 | else |
5c4f68f1 | 3246 | buf->overlays_after = tail; |
2eec3b4e | 3247 | tail = prev; |
1ab256cb | 3248 | } |
2eec3b4e RS |
3249 | else |
3250 | /* We've reached the things that should stay in overlays_before. | |
3251 | All the rest of overlays_before must end even earlier, | |
3252 | so stop now. */ | |
3253 | break; | |
3254 | } | |
3255 | ||
3256 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3257 | prev = NULL; |
3258 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3259 | { |
2410d73a SM |
3260 | next = tail->next; |
3261 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3262 | |
3263 | /* If the overlay is not valid, get rid of it. */ | |
3264 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3265 | #if 1 |
3266 | abort (); | |
3267 | #else | |
2eec3b4e RS |
3268 | { |
3269 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3270 | if (!NILP (prev)) | |
7539e11f | 3271 | XCDR (prev) = next; |
2eec3b4e | 3272 | else |
5c4f68f1 | 3273 | buf->overlays_after = next; |
2eec3b4e RS |
3274 | tail = prev; |
3275 | continue; | |
3276 | } | |
52f8ec73 | 3277 | #endif |
2eec3b4e RS |
3278 | |
3279 | beg = OVERLAY_START (overlay); | |
3280 | end = OVERLAY_END (overlay); | |
3281 | ||
3282 | /* Stop looking, when we know that nothing further | |
3283 | can possibly end before POS. */ | |
3284 | if (OVERLAY_POSITION (beg) > pos) | |
3285 | break; | |
3286 | ||
3287 | if (OVERLAY_POSITION (end) <= pos) | |
3288 | { | |
3289 | /* OVERLAY needs to be moved. */ | |
3290 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3291 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3292 | |
3293 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3294 | if (prev) |
3295 | prev->next = next; | |
2eec3b4e | 3296 | else |
5c4f68f1 | 3297 | buf->overlays_after = next; |
2eec3b4e RS |
3298 | |
3299 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3300 | other_prev = NULL; |
3301 | for (other = buf->overlays_before; other; | |
3302 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3303 | { |
3304 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3305 | |
2410d73a SM |
3306 | XSETMISC (otheroverlay, other); |
3307 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3308 | |
3309 | otherend = OVERLAY_END (otheroverlay); | |
3310 | if (OVERLAY_POSITION (otherend) <= where) | |
3311 | break; | |
3312 | } | |
3313 | ||
3314 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3315 | tail->next = other; |
3316 | if (other_prev) | |
3317 | other_prev->next = tail; | |
2eec3b4e | 3318 | else |
5c4f68f1 | 3319 | buf->overlays_before = tail; |
2eec3b4e RS |
3320 | tail = prev; |
3321 | } | |
3322 | } | |
3323 | ||
c2d5b10f | 3324 | buf->overlay_center = pos; |
2eec3b4e | 3325 | } |
2b1bdf65 | 3326 | |
423cdb46 KH |
3327 | void |
3328 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3329 | EMACS_INT pos; |
3330 | EMACS_INT length; | |
423cdb46 KH |
3331 | { |
3332 | /* After an insertion, the lists are still sorted properly, | |
3333 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3334 | if (current_buffer->overlay_center >= pos) |
3335 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3336 | } |
3337 | ||
3338 | void | |
3339 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3340 | EMACS_INT pos; |
3341 | EMACS_INT length; | |
423cdb46 | 3342 | { |
c2d5b10f | 3343 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3344 | /* The deletion was to our right. No change needed; the before- and |
3345 | after-lists are still consistent. */ | |
3346 | ; | |
c2d5b10f | 3347 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3348 | /* The deletion was to our left. We need to adjust the center value |
3349 | to account for the change in position, but the lists are consistent | |
3350 | given the new value. */ | |
c2d5b10f | 3351 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3352 | else |
3353 | /* We're right in the middle. There might be things on the after-list | |
3354 | that now belong on the before-list. Recentering will move them, | |
3355 | and also update the center point. */ | |
3356 | recenter_overlay_lists (current_buffer, pos); | |
3357 | } | |
3358 | ||
2b1bdf65 KH |
3359 | /* Fix up overlays that were garbled as a result of permuting markers |
3360 | in the range START through END. Any overlay with at least one | |
3361 | endpoint in this range will need to be unlinked from the overlay | |
3362 | list and reinserted in its proper place. | |
3363 | Such an overlay might even have negative size at this point. | |
99a72bdf | 3364 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3365 | void |
abdb9b83 | 3366 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3367 | register int start, end; |
3368 | { | |
6af718a4 | 3369 | Lisp_Object overlay; |
2410d73a | 3370 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3371 | /* These are either nil, indicating that before_list or after_list |
3372 | should be assigned, or the cons cell the cdr of which should be | |
3373 | assigned. */ | |
2410d73a | 3374 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3375 | /* 'Parent', likewise, indicates a cons cell or |
3376 | current_buffer->overlays_before or overlays_after, depending | |
3377 | which loop we're in. */ | |
2410d73a | 3378 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3379 | int startpos, endpos; |
3380 | ||
3381 | /* This algorithm shifts links around instead of consing and GCing. | |
3382 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3383 | well-formed list except that its last element, the CDR of beforep |
3384 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3385 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3386 | that before_list isn't initialized, although it may look | |
3387 | strange. */ | |
2410d73a | 3388 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3389 | { |
2410d73a | 3390 | XSETMISC (overlay, tail); |
99a72bdf | 3391 | |
2b1bdf65 | 3392 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
99a72bdf MY |
3393 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3394 | ||
3395 | /* If the overlay is backwards, make it empty. */ | |
3396 | if (endpos < startpos) | |
3397 | { | |
3398 | startpos = endpos; | |
3399 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3400 | Qnil); | |
3401 | } | |
3402 | ||
2b1bdf65 KH |
3403 | if (endpos < start) |
3404 | break; | |
60ebfdf3 | 3405 | |
2b1bdf65 KH |
3406 | if (endpos < end |
3407 | || (startpos >= start && startpos < end)) | |
3408 | { | |
2b1bdf65 KH |
3409 | /* Add it to the end of the wrong list. Later on, |
3410 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3411 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3412 | { |
2410d73a | 3413 | if (!afterp) |
1138e742 KR |
3414 | after_list = tail; |
3415 | else | |
2410d73a | 3416 | afterp->next = tail; |
1138e742 | 3417 | afterp = tail; |
2b1bdf65 KH |
3418 | } |
3419 | else | |
3420 | { | |
2410d73a | 3421 | if (!beforep) |
1138e742 KR |
3422 | before_list = tail; |
3423 | else | |
2410d73a | 3424 | beforep->next = tail; |
1138e742 | 3425 | beforep = tail; |
2b1bdf65 | 3426 | } |
2410d73a SM |
3427 | if (!parent) |
3428 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3429 | else |
2410d73a SM |
3430 | parent->next = tail->next; |
3431 | tail = tail->next; | |
2b1bdf65 KH |
3432 | } |
3433 | else | |
2410d73a | 3434 | parent = tail, tail = parent->next; |
2b1bdf65 | 3435 | } |
2410d73a | 3436 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3437 | { |
2410d73a | 3438 | XSETMISC (overlay, tail); |
99a72bdf | 3439 | |
2b1bdf65 | 3440 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
99a72bdf MY |
3441 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3442 | ||
3443 | /* If the overlay is backwards, make it empty. */ | |
3444 | if (endpos < startpos) | |
3445 | { | |
3446 | startpos = endpos; | |
3447 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3448 | Qnil); |
99a72bdf MY |
3449 | } |
3450 | ||
2b1bdf65 KH |
3451 | if (startpos >= end) |
3452 | break; | |
99a72bdf | 3453 | |
2b1bdf65 KH |
3454 | if (startpos >= start |
3455 | || (endpos >= start && endpos < end)) | |
3456 | { | |
c2d5b10f | 3457 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3458 | { |
2410d73a | 3459 | if (!afterp) |
1138e742 KR |
3460 | after_list = tail; |
3461 | else | |
2410d73a | 3462 | afterp->next = tail; |
1138e742 | 3463 | afterp = tail; |
2b1bdf65 KH |
3464 | } |
3465 | else | |
3466 | { | |
2410d73a | 3467 | if (!beforep) |
1138e742 KR |
3468 | before_list = tail; |
3469 | else | |
2410d73a | 3470 | beforep->next = tail; |
1138e742 | 3471 | beforep = tail; |
2b1bdf65 | 3472 | } |
2410d73a SM |
3473 | if (!parent) |
3474 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3475 | else |
2410d73a SM |
3476 | parent->next = tail->next; |
3477 | tail = tail->next; | |
2b1bdf65 KH |
3478 | } |
3479 | else | |
2410d73a | 3480 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3481 | } |
3482 | ||
3483 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3484 | and let the recenter function make it sane again. */ | |
2410d73a | 3485 | if (beforep) |
1138e742 | 3486 | { |
2410d73a | 3487 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3488 | current_buffer->overlays_before = before_list; |
3489 | } | |
c2d5b10f | 3490 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3491 | |
2410d73a | 3492 | if (afterp) |
1138e742 | 3493 | { |
2410d73a | 3494 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3495 | current_buffer->overlays_after = after_list; |
3496 | } | |
c2d5b10f | 3497 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3498 | } |
3b06f880 KH |
3499 | |
3500 | /* We have two types of overlay: the one whose ending marker is | |
3501 | after-insertion-marker (this is the usual case) and the one whose | |
3502 | ending marker is before-insertion-marker. When `overlays_before' | |
3503 | contains overlays of the latter type and the former type in this | |
3504 | order and both overlays end at inserting position, inserting a text | |
3505 | increases only the ending marker of the latter type, which results | |
3506 | in incorrect ordering of `overlays_before'. | |
3507 | ||
3508 | This function fixes ordering of overlays in the slot | |
3509 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3510 | was at PREV, and now is at POS. */ | |
3511 | ||
01136e9b | 3512 | void |
3b06f880 KH |
3513 | fix_overlays_before (bp, prev, pos) |
3514 | struct buffer *bp; | |
c2d5b10f | 3515 | EMACS_INT prev, pos; |
3b06f880 | 3516 | { |
2410d73a SM |
3517 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3518 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3519 | Lisp_Object tem; | |
c2d5b10f | 3520 | EMACS_INT end; |
3b06f880 KH |
3521 | |
3522 | /* After the insertion, the several overlays may be in incorrect | |
3523 | order. The possibility is that, in the list `overlays_before', | |
3524 | an overlay which ends at POS appears after an overlay which ends | |
3525 | at PREV. Since POS is greater than PREV, we must fix the | |
3526 | ordering of these overlays, by moving overlays ends at POS before | |
3527 | the overlays ends at PREV. */ | |
3528 | ||
3529 | /* At first, find a place where disordered overlays should be linked | |
3530 | in. It is where an overlay which end before POS exists. (i.e. an | |
3531 | overlay whose ending marker is after-insertion-marker if disorder | |
3532 | exists). */ | |
2410d73a SM |
3533 | while (tail |
3534 | && (XSETMISC (tem, tail), | |
3535 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3536 | { |
3537 | parent = tail; | |
2410d73a | 3538 | tail = tail->next; |
1138e742 | 3539 | } |
3b06f880 KH |
3540 | |
3541 | /* If we don't find such an overlay, | |
3542 | or the found one ends before PREV, | |
3543 | or the found one is the last one in the list, | |
3544 | we don't have to fix anything. */ | |
f93ad4cf | 3545 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3546 | return; |
3547 | ||
1138e742 KR |
3548 | right_pair = parent; |
3549 | parent = tail; | |
2410d73a | 3550 | tail = tail->next; |
3b06f880 | 3551 | |
1138e742 | 3552 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3553 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3554 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3555 | we found an overlay which ends before PREV, the remaining | |
3556 | overlays are in correct order. */ | |
2410d73a | 3557 | while (tail) |
3b06f880 | 3558 | { |
2410d73a SM |
3559 | XSETMISC (tem, tail); |
3560 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3561 | |
3562 | if (end == pos) | |
3563 | { /* This overlay is disordered. */ | |
2410d73a | 3564 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3565 | |
3566 | /* Unlink the found overlay. */ | |
2410d73a SM |
3567 | tail = found->next; |
3568 | parent->next = tail; | |
1138e742 KR |
3569 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3570 | and link it into the right place. */ | |
2410d73a | 3571 | if (!right_pair) |
1138e742 | 3572 | { |
2410d73a | 3573 | found->next = bp->overlays_before; |
1138e742 KR |
3574 | bp->overlays_before = found; |
3575 | } | |
3576 | else | |
3577 | { | |
2410d73a SM |
3578 | found->next = right_pair->next; |
3579 | right_pair->next = found; | |
1138e742 | 3580 | } |
3b06f880 KH |
3581 | } |
3582 | else if (end == prev) | |
1138e742 KR |
3583 | { |
3584 | parent = tail; | |
2410d73a | 3585 | tail = tail->next; |
1138e742 | 3586 | } |
3b06f880 KH |
3587 | else /* No more disordered overlay. */ |
3588 | break; | |
3589 | } | |
3590 | } | |
2eec3b4e | 3591 | \f |
52f8ec73 | 3592 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3593 | doc: /* Return t if OBJECT is an overlay. */) |
3594 | (object) | |
52f8ec73 JB |
3595 | Lisp_Object object; |
3596 | { | |
3597 | return (OVERLAYP (object) ? Qt : Qnil); | |
3598 | } | |
3599 | ||
acac2700 | 3600 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3601 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3602 | If omitted, BUFFER defaults to the current buffer. |
3603 | BEG and END may be integers or markers. | |
a625ee20 RS |
3604 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3605 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3606 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3607 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3608 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3609 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3610 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3611 | Lisp_Object beg, end, buffer; |
acac2700 | 3612 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3613 | { |
3614 | Lisp_Object overlay; | |
5c4f68f1 | 3615 | struct buffer *b; |
2eec3b4e | 3616 | |
5c4f68f1 | 3617 | if (NILP (buffer)) |
67180c6a | 3618 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3619 | else |
b7826503 | 3620 | CHECK_BUFFER (buffer); |
883047b9 JB |
3621 | if (MARKERP (beg) |
3622 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3623 | error ("Marker points into wrong buffer"); | |
3624 | if (MARKERP (end) | |
3625 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3626 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3627 | |
b7826503 PJ |
3628 | CHECK_NUMBER_COERCE_MARKER (beg); |
3629 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3630 | |
883047b9 | 3631 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3632 | { |
c99fc30f KH |
3633 | Lisp_Object temp; |
3634 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3635 | } |
883047b9 JB |
3636 | |
3637 | b = XBUFFER (buffer); | |
3638 | ||
3639 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3640 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3641 | |
acac2700 RS |
3642 | if (!NILP (front_advance)) |
3643 | XMARKER (beg)->insertion_type = 1; | |
3644 | if (!NILP (rear_advance)) | |
3645 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3646 | |
48e2e3ba | 3647 | overlay = allocate_misc (); |
89ca3e1b | 3648 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3649 | XOVERLAY (overlay)->start = beg; |
3650 | XOVERLAY (overlay)->end = end; | |
3651 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3652 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3653 | |
177c0ea7 | 3654 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3655 | end = OVERLAY_END (overlay); |
c2d5b10f | 3656 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3657 | { |
3658 | if (b->overlays_after) | |
3659 | XOVERLAY (overlay)->next = b->overlays_after; | |
3660 | b->overlays_after = XOVERLAY (overlay); | |
3661 | } | |
2eec3b4e | 3662 | else |
2410d73a SM |
3663 | { |
3664 | if (b->overlays_before) | |
3665 | XOVERLAY (overlay)->next = b->overlays_before; | |
3666 | b->overlays_before = XOVERLAY (overlay); | |
3667 | } | |
2eec3b4e RS |
3668 | |
3669 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3670 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3671 | |
b61982dd JB |
3672 | /* We don't need to redisplay the region covered by the overlay, because |
3673 | the overlay has no properties at the moment. */ | |
3674 | ||
2eec3b4e RS |
3675 | return overlay; |
3676 | } | |
876aa27c RS |
3677 | \f |
3678 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3679 | ||
3680 | static void | |
3681 | modify_overlay (buf, start, end) | |
3682 | struct buffer *buf; | |
c2d5b10f | 3683 | EMACS_INT start, end; |
876aa27c | 3684 | { |
876aa27c RS |
3685 | if (start > end) |
3686 | { | |
3687 | int temp = start; | |
26f545d7 GM |
3688 | start = end; |
3689 | end = temp; | |
876aa27c RS |
3690 | } |
3691 | ||
481b5054 | 3692 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3693 | |
876aa27c RS |
3694 | /* If this is a buffer not in the selected window, |
3695 | we must do other windows. */ | |
3696 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3697 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3698 | /* If multiple windows show this buffer, we must do other windows. */ |
3699 | else if (buffer_shared > 1) | |
3700 | windows_or_buffers_changed = 1; | |
18700091 KS |
3701 | /* If we modify an overlay at the end of the buffer, we cannot |
3702 | be sure that window end is still valid. */ | |
3703 | else if (end >= ZV && start <= ZV) | |
3704 | windows_or_buffers_changed = 1; | |
876aa27c | 3705 | |
d8b9150f | 3706 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3707 | } |
2eec3b4e | 3708 | |
018ba359 | 3709 | \f |
2e34157c RS |
3710 | Lisp_Object Fdelete_overlay (); |
3711 | ||
2410d73a SM |
3712 | static struct Lisp_Overlay * |
3713 | unchain_overlay (list, overlay) | |
3714 | struct Lisp_Overlay *list, *overlay; | |
3715 | { | |
3716 | struct Lisp_Overlay *tmp, *prev; | |
3717 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3718 | if (tmp == overlay) | |
3719 | { | |
3720 | if (prev) | |
3721 | prev->next = tmp->next; | |
3722 | else | |
3723 | list = tmp->next; | |
3724 | overlay->next = NULL; | |
3725 | break; | |
3726 | } | |
3727 | return list; | |
3728 | } | |
3729 | ||
5c4f68f1 | 3730 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3731 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3732 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3733 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3734 | buffer. */) |
3735 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3736 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3737 | { |
0a4469c9 RS |
3738 | struct buffer *b, *ob; |
3739 | Lisp_Object obuffer; | |
aed13378 | 3740 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3741 | |
b7826503 | 3742 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3743 | if (NILP (buffer)) |
3744 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3745 | if (NILP (buffer)) |
67180c6a | 3746 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3747 | CHECK_BUFFER (buffer); |
883047b9 JB |
3748 | |
3749 | if (MARKERP (beg) | |
3750 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3751 | error ("Marker points into wrong buffer"); | |
3752 | if (MARKERP (end) | |
3753 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3754 | error ("Marker points into wrong buffer"); | |
3755 | ||
b7826503 PJ |
3756 | CHECK_NUMBER_COERCE_MARKER (beg); |
3757 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3758 | |
9d7608b7 KH |
3759 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3760 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3761 | |
b61982dd JB |
3762 | if (XINT (beg) > XINT (end)) |
3763 | { | |
c99fc30f KH |
3764 | Lisp_Object temp; |
3765 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3766 | } |
3767 | ||
9d7608b7 KH |
3768 | specbind (Qinhibit_quit, Qt); |
3769 | ||
0a4469c9 | 3770 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3771 | b = XBUFFER (buffer); |
8801a864 | 3772 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3773 | |
c82ed728 | 3774 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3775 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3776 | { |
3777 | /* Redisplay where the overlay was. */ | |
3778 | if (!NILP (obuffer)) | |
3779 | { | |
2e34157c RS |
3780 | int o_beg; |
3781 | int o_end; | |
50760c4a | 3782 | |
80509f2f RS |
3783 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3784 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3785 | |
2e34157c | 3786 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3787 | } |
3788 | ||
3789 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3790 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3791 | } |
c82ed728 JB |
3792 | else |
3793 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3794 | { | |
2e34157c | 3795 | int o_beg, o_end; |
c82ed728 | 3796 | |
80509f2f RS |
3797 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3798 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3799 | |
2e34157c RS |
3800 | if (o_beg == XINT (beg)) |
3801 | modify_overlay (b, o_end, XINT (end)); | |
3802 | else if (o_end == XINT (end)) | |
3803 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3804 | else |
3805 | { | |
2e34157c RS |
3806 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3807 | if (XINT (end) > o_end) o_end = XINT (end); | |
3808 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3809 | } |
3810 | } | |
b61982dd | 3811 | |
0a4469c9 RS |
3812 | if (!NILP (obuffer)) |
3813 | { | |
2410d73a SM |
3814 | ob->overlays_before |
3815 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3816 | ob->overlays_after | |
3817 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3818 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3819 | } |
5c4f68f1 JB |
3820 | |
3821 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3822 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3823 | |
177c0ea7 | 3824 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3825 | end = OVERLAY_END (overlay); |
c2d5b10f | 3826 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3827 | { |
2f297815 GM |
3828 | XOVERLAY (overlay)->next = b->overlays_after; |
3829 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3830 | } |
2eec3b4e | 3831 | else |
2410d73a | 3832 | { |
2f297815 GM |
3833 | XOVERLAY (overlay)->next = b->overlays_before; |
3834 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3835 | } |
2eec3b4e RS |
3836 | |
3837 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3838 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3839 | |
0a4469c9 | 3840 | return unbind_to (count, overlay); |
2eec3b4e RS |
3841 | } |
3842 | ||
3843 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3844 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3845 | (overlay) | |
5c4f68f1 | 3846 | Lisp_Object overlay; |
2eec3b4e | 3847 | { |
0a4469c9 | 3848 | Lisp_Object buffer; |
5c4f68f1 | 3849 | struct buffer *b; |
aed13378 | 3850 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3851 | |
b7826503 | 3852 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3853 | |
0a4469c9 RS |
3854 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3855 | if (NILP (buffer)) | |
3856 | return Qnil; | |
3857 | ||
3858 | b = XBUFFER (buffer); | |
0a4469c9 | 3859 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3860 | |
2410d73a SM |
3861 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3862 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3863 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3864 | modify_overlay (b, |
8231a9aa RS |
3865 | marker_position (OVERLAY_START (overlay)), |
3866 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3867 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3868 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3869 | ||
e58c389d | 3870 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3871 | display optimizations for the affected buffer, on the basis that |
3872 | these strings may contain newlines. This is easier to do than to | |
3873 | check for that situation during redisplay. */ | |
3874 | if (!windows_or_buffers_changed | |
3875 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3876 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3877 | b->prevent_redisplay_optimizations_p = 1; | |
3878 | ||
0a4469c9 | 3879 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3880 | } |
3881 | \f | |
8ebafa8d JB |
3882 | /* Overlay dissection functions. */ |
3883 | ||
3884 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3885 | doc: /* Return the position at which OVERLAY starts. */) |
3886 | (overlay) | |
8ebafa8d JB |
3887 | Lisp_Object overlay; |
3888 | { | |
b7826503 | 3889 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3890 | |
3891 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3892 | } | |
3893 | ||
3894 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3895 | doc: /* Return the position at which OVERLAY ends. */) |
3896 | (overlay) | |
8ebafa8d JB |
3897 | Lisp_Object overlay; |
3898 | { | |
b7826503 | 3899 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3900 | |
3901 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3902 | } | |
3903 | ||
3904 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3905 | doc: /* Return the buffer OVERLAY belongs to. |
3906 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 3907 | (overlay) |
8ebafa8d JB |
3908 | Lisp_Object overlay; |
3909 | { | |
b7826503 | 3910 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3911 | |
3912 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3913 | } | |
3914 | ||
3915 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3916 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3917 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3918 | OVERLAY. */) |
3919 | (overlay) | |
8ebafa8d JB |
3920 | Lisp_Object overlay; |
3921 | { | |
b7826503 | 3922 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3923 | |
48e2e3ba | 3924 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3925 | } |
3926 | ||
3927 | \f | |
2eec3b4e | 3928 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3929 | doc: /* Return a list of the overlays that contain position POS. */) |
3930 | (pos) | |
2eec3b4e RS |
3931 | Lisp_Object pos; |
3932 | { | |
3933 | int noverlays; | |
2eec3b4e RS |
3934 | Lisp_Object *overlay_vec; |
3935 | int len; | |
3936 | Lisp_Object result; | |
3937 | ||
b7826503 | 3938 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3939 | |
3940 | len = 10; | |
a9800ae8 | 3941 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3942 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3943 | ||
3944 | /* Put all the overlays we want in a vector in overlay_vec. | |
3945 | Store the length in len. */ | |
2a77a7d7 | 3946 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3947 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3948 | |
3949 | /* Make a list of them all. */ | |
3950 | result = Flist (noverlays, overlay_vec); | |
3951 | ||
9ac0d9e0 | 3952 | xfree (overlay_vec); |
2eec3b4e RS |
3953 | return result; |
3954 | } | |
3955 | ||
74514898 | 3956 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3957 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3958 | Overlap means that at least one character is contained within the overlay |
3959 | and also contained within the specified region. | |
3960 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3961 | or between BEG and END. */) |
3962 | (beg, end) | |
74514898 RS |
3963 | Lisp_Object beg, end; |
3964 | { | |
3965 | int noverlays; | |
3966 | Lisp_Object *overlay_vec; | |
3967 | int len; | |
3968 | Lisp_Object result; | |
3969 | ||
b7826503 PJ |
3970 | CHECK_NUMBER_COERCE_MARKER (beg); |
3971 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3972 | |
3973 | len = 10; | |
3974 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3975 | ||
3976 | /* Put all the overlays we want in a vector in overlay_vec. | |
3977 | Store the length in len. */ | |
3978 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3979 | (int *) 0, (int *) 0); | |
3980 | ||
3981 | /* Make a list of them all. */ | |
3982 | result = Flist (noverlays, overlay_vec); | |
3983 | ||
3984 | xfree (overlay_vec); | |
3985 | return result; | |
3986 | } | |
3987 | ||
2eec3b4e | 3988 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3989 | 1, 1, 0, |
7ee72033 | 3990 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3991 | If there are no overlay boundaries from POS to (point-max), |
3992 | the value is (point-max). */) | |
7ee72033 | 3993 | (pos) |
2eec3b4e RS |
3994 | Lisp_Object pos; |
3995 | { | |
3996 | int noverlays; | |
3997 | int endpos; | |
3998 | Lisp_Object *overlay_vec; | |
3999 | int len; | |
2eec3b4e RS |
4000 | int i; |
4001 | ||
b7826503 | 4002 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4003 | |
4004 | len = 10; | |
4005 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4006 | ||
4007 | /* Put all the overlays we want in a vector in overlay_vec. | |
4008 | Store the length in len. | |
4009 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4010 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4011 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
4012 | |
4013 | /* If any of these overlays ends before endpos, | |
4014 | use its ending point instead. */ | |
4015 | for (i = 0; i < noverlays; i++) | |
4016 | { | |
4017 | Lisp_Object oend; | |
4018 | int oendpos; | |
4019 | ||
4020 | oend = OVERLAY_END (overlay_vec[i]); | |
4021 | oendpos = OVERLAY_POSITION (oend); | |
4022 | if (oendpos < endpos) | |
4023 | endpos = oendpos; | |
1ab256cb RM |
4024 | } |
4025 | ||
9ac0d9e0 | 4026 | xfree (overlay_vec); |
2eec3b4e RS |
4027 | return make_number (endpos); |
4028 | } | |
239c932b RS |
4029 | |
4030 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4031 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4032 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4033 | If there are no overlay boundaries from (point-min) to POS, |
4034 | the value is (point-min). */) | |
7ee72033 | 4035 | (pos) |
239c932b RS |
4036 | Lisp_Object pos; |
4037 | { | |
4038 | int noverlays; | |
4039 | int prevpos; | |
4040 | Lisp_Object *overlay_vec; | |
4041 | int len; | |
239c932b | 4042 | |
b7826503 | 4043 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4044 | |
624bbdc4 RS |
4045 | /* At beginning of buffer, we know the answer; |
4046 | avoid bug subtracting 1 below. */ | |
4047 | if (XINT (pos) == BEGV) | |
4048 | return pos; | |
4049 | ||
017f0539 GM |
4050 | len = 10; |
4051 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4052 | ||
239c932b RS |
4053 | /* Put all the overlays we want in a vector in overlay_vec. |
4054 | Store the length in len. | |
daa1c109 | 4055 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4056 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4057 | (int *) 0, &prevpos, 1); |
239c932b | 4058 | |
239c932b RS |
4059 | xfree (overlay_vec); |
4060 | return make_number (prevpos); | |
4061 | } | |
2eec3b4e RS |
4062 | \f |
4063 | /* These functions are for debugging overlays. */ | |
4064 | ||
4065 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4066 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4067 | The car has all the overlays before the overlay center; |
4068 | the cdr has all the overlays after the overlay center. | |
4069 | Recentering overlays moves overlays between these lists. | |
4070 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4071 | However, the overlays you get are the real objects that the buffer uses. */) |
4072 | () | |
2eec3b4e | 4073 | { |
2410d73a SM |
4074 | struct Lisp_Overlay *ol; |
4075 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4076 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4077 | { | |
4078 | XSETMISC (tmp, ol); | |
4079 | before = Fcons (tmp, before); | |
4080 | } | |
4081 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4082 | { | |
4083 | XSETMISC (tmp, ol); | |
4084 | after = Fcons (tmp, after); | |
4085 | } | |
4086 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4087 | } |
4088 | ||
4089 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4090 | doc: /* Recenter the overlays of the current buffer around position POS. |
4091 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4092 | for positions far away from POS). */) | |
7ee72033 | 4093 | (pos) |
2eec3b4e RS |
4094 | Lisp_Object pos; |
4095 | { | |
b7826503 | 4096 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4097 | |
5c4f68f1 | 4098 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4099 | return Qnil; |
4100 | } | |
4101 | \f | |
4102 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4103 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4104 | (overlay, prop) | |
2eec3b4e RS |
4105 | Lisp_Object overlay, prop; |
4106 | { | |
b7826503 | 4107 | CHECK_OVERLAY (overlay); |
9a593927 | 4108 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4109 | } |
4110 | ||
4111 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4112 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4113 | (overlay, prop, value) | |
2eec3b4e RS |
4114 | Lisp_Object overlay, prop, value; |
4115 | { | |
48e2e3ba | 4116 | Lisp_Object tail, buffer; |
9d7608b7 | 4117 | int changed; |
2eec3b4e | 4118 | |
b7826503 | 4119 | CHECK_OVERLAY (overlay); |
b61982dd | 4120 | |
274a9425 RS |
4121 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4122 | ||
48e2e3ba | 4123 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4124 | CONSP (tail) && CONSP (XCDR (tail)); |
4125 | tail = XCDR (XCDR (tail))) | |
4126 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4127 | { |
7539e11f | 4128 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4129 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4130 | goto found; |
274a9425 | 4131 | } |
9d7608b7 KH |
4132 | /* It wasn't in the list, so add it to the front. */ |
4133 | changed = !NILP (value); | |
48e2e3ba KH |
4134 | XOVERLAY (overlay)->plist |
4135 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4136 | found: |
4137 | if (! NILP (buffer)) | |
4138 | { | |
4139 | if (changed) | |
876aa27c | 4140 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4141 | marker_position (OVERLAY_START (overlay)), |
4142 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4143 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4144 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4145 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4146 | Fdelete_overlay (overlay); | |
4147 | } | |
7d63db98 | 4148 | |
2eec3b4e | 4149 | return value; |
1ab256cb RM |
4150 | } |
4151 | \f | |
9115729e KH |
4152 | /* Subroutine of report_overlay_modification. */ |
4153 | ||
4154 | /* Lisp vector holding overlay hook functions to call. | |
4155 | Vector elements come in pairs. | |
4156 | Each even-index element is a list of hook functions. | |
4157 | The following odd-index element is the overlay they came from. | |
4158 | ||
4159 | Before the buffer change, we fill in this vector | |
4160 | as we call overlay hook functions. | |
4161 | After the buffer change, we get the functions to call from this vector. | |
4162 | This way we always call the same functions before and after the change. */ | |
4163 | static Lisp_Object last_overlay_modification_hooks; | |
4164 | ||
4165 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4166 | static int last_overlay_modification_hooks_used; | |
4167 | ||
4168 | /* Add one functionlist/overlay pair | |
4169 | to the end of last_overlay_modification_hooks. */ | |
4170 | ||
4171 | static void | |
4172 | add_overlay_mod_hooklist (functionlist, overlay) | |
4173 | Lisp_Object functionlist, overlay; | |
4174 | { | |
4175 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4176 | ||
4177 | if (last_overlay_modification_hooks_used == oldsize) | |
4178 | { | |
4179 | Lisp_Object old; | |
4180 | old = last_overlay_modification_hooks; | |
4181 | last_overlay_modification_hooks | |
4182 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4183 | bcopy (XVECTOR (old)->contents, |
4184 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4185 | sizeof (Lisp_Object) * oldsize); |
4186 | } | |
2410d73a SM |
4187 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = functionlist; |
4188 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = overlay; | |
9115729e KH |
4189 | } |
4190 | \f | |
173f2a64 RS |
4191 | /* Run the modification-hooks of overlays that include |
4192 | any part of the text in START to END. | |
9115729e KH |
4193 | If this change is an insertion, also |
4194 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4195 | and the insert-after-hooks of overlay ending at START. |
4196 | ||
4197 | This is called both before and after the modification. | |
4198 | AFTER is nonzero when we call after the modification. | |
4199 | ||
9115729e KH |
4200 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4201 | When AFTER is nonzero, they are the start position, | |
4202 | the position after the inserted new text, | |
4203 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4204 | |
4205 | void | |
930a9140 | 4206 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4207 | Lisp_Object start, end; |
930a9140 RS |
4208 | int after; |
4209 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4210 | { |
2410d73a SM |
4211 | Lisp_Object prop, overlay; |
4212 | struct Lisp_Overlay *tail; | |
9115729e KH |
4213 | /* 1 if this change is an insertion. */ |
4214 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4215 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4216 | |
4217 | overlay = Qnil; | |
2410d73a | 4218 | tail = NULL; |
9115729e | 4219 | |
27c6b98e SM |
4220 | /* We used to run the functions as soon as we found them and only register |
4221 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4222 | case. But running elisp code as we traverse the list of overlays is | |
4223 | painful because the list can be modified by the elisp code so we had to | |
4224 | copy at several places. We now simply do a read-only traversal that | |
4225 | only collects the functions to run and we run them afterwards. It's | |
4226 | simpler, especially since all the code was already there. -stef */ | |
4227 | ||
a615c6dc | 4228 | if (!after) |
173f2a64 | 4229 | { |
a615c6dc SM |
4230 | /* We are being called before a change. |
4231 | Scan the overlays to find the functions to call. */ | |
4232 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4233 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4234 | { |
a615c6dc SM |
4235 | int startpos, endpos; |
4236 | Lisp_Object ostart, oend; | |
4237 | ||
2410d73a | 4238 | XSETMISC (overlay, tail); |
a615c6dc SM |
4239 | |
4240 | ostart = OVERLAY_START (overlay); | |
4241 | oend = OVERLAY_END (overlay); | |
4242 | endpos = OVERLAY_POSITION (oend); | |
4243 | if (XFASTINT (start) > endpos) | |
4244 | break; | |
4245 | startpos = OVERLAY_POSITION (ostart); | |
4246 | if (insertion && (XFASTINT (start) == startpos | |
4247 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4248 | { |
a615c6dc SM |
4249 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4250 | if (!NILP (prop)) | |
4251 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4252 | } |
a615c6dc SM |
4253 | if (insertion && (XFASTINT (start) == endpos |
4254 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4255 | { |
a615c6dc SM |
4256 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4257 | if (!NILP (prop)) | |
4258 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4259 | } |
a615c6dc SM |
4260 | /* Test for intersecting intervals. This does the right thing |
4261 | for both insertion and deletion. */ | |
4262 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4263 | { |
a615c6dc SM |
4264 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4265 | if (!NILP (prop)) | |
4266 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4267 | } |
173f2a64 | 4268 | } |
60ebfdf3 | 4269 | |
2410d73a | 4270 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4271 | { |
a615c6dc SM |
4272 | int startpos, endpos; |
4273 | Lisp_Object ostart, oend; | |
4274 | ||
2410d73a | 4275 | XSETMISC (overlay, tail); |
a615c6dc SM |
4276 | |
4277 | ostart = OVERLAY_START (overlay); | |
4278 | oend = OVERLAY_END (overlay); | |
4279 | startpos = OVERLAY_POSITION (ostart); | |
4280 | endpos = OVERLAY_POSITION (oend); | |
4281 | if (XFASTINT (end) < startpos) | |
4282 | break; | |
4283 | if (insertion && (XFASTINT (start) == startpos | |
4284 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4285 | { |
a615c6dc SM |
4286 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4287 | if (!NILP (prop)) | |
4288 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4289 | } |
a615c6dc SM |
4290 | if (insertion && (XFASTINT (start) == endpos |
4291 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4292 | { |
a615c6dc SM |
4293 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4294 | if (!NILP (prop)) | |
4295 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4296 | } |
a615c6dc SM |
4297 | /* Test for intersecting intervals. This does the right thing |
4298 | for both insertion and deletion. */ | |
4299 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4300 | { |
a615c6dc SM |
4301 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4302 | if (!NILP (prop)) | |
4303 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4304 | } |
173f2a64 RS |
4305 | } |
4306 | } | |
55b48893 | 4307 | |
a615c6dc SM |
4308 | GCPRO4 (overlay, arg1, arg2, arg3); |
4309 | { | |
4310 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4311 | First copy the vector contents, in case some of these hooks | |
4312 | do subsequent modification of the buffer. */ | |
4313 | int size = last_overlay_modification_hooks_used; | |
4314 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4315 | int i; | |
4316 | ||
4317 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4318 | copy, size * sizeof (Lisp_Object)); | |
4319 | gcpro1.var = copy; | |
4320 | gcpro1.nvars = size; | |
4321 | ||
4322 | for (i = 0; i < size;) | |
4323 | { | |
4324 | Lisp_Object prop, overlay; | |
4325 | prop = copy[i++]; | |
4326 | overlay = copy[i++]; | |
4327 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4328 | } | |
4329 | } | |
55b48893 | 4330 | UNGCPRO; |
173f2a64 RS |
4331 | } |
4332 | ||
4333 | static void | |
930a9140 RS |
4334 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4335 | Lisp_Object list, overlay; | |
4336 | int after; | |
4337 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4338 | { |
930a9140 | 4339 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4340 | |
930a9140 | 4341 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4342 | |
6d70a280 | 4343 | while (CONSP (list)) |
173f2a64 | 4344 | { |
930a9140 | 4345 | if (NILP (arg3)) |
6d70a280 | 4346 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4347 | else |
6d70a280 SM |
4348 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4349 | list = XCDR (list); | |
173f2a64 RS |
4350 | } |
4351 | UNGCPRO; | |
4352 | } | |
9d7608b7 KH |
4353 | |
4354 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4355 | property is set. */ | |
4356 | void | |
4357 | evaporate_overlays (pos) | |
c2d5b10f | 4358 | EMACS_INT pos; |
9d7608b7 | 4359 | { |
2410d73a SM |
4360 | Lisp_Object overlay, hit_list; |
4361 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4362 | |
4363 | hit_list = Qnil; | |
c2d5b10f | 4364 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4365 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4366 | { |
4367 | int endpos; | |
2410d73a | 4368 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4369 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4370 | if (endpos < pos) | |
4371 | break; | |
4372 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4373 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4374 | hit_list = Fcons (overlay, hit_list); |
4375 | } | |
4376 | else | |
2410d73a | 4377 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4378 | { |
4379 | int startpos; | |
2410d73a | 4380 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4381 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4382 | if (startpos > pos) | |
4383 | break; | |
4384 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4385 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4386 | hit_list = Fcons (overlay, hit_list); |
4387 | } | |
7539e11f KR |
4388 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4389 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4390 | } |
173f2a64 | 4391 | \f |
54dfdeb0 | 4392 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4393 | in the slot with offset OFFSET. */ |
4394 | ||
0fa3ba92 | 4395 | void |
54dfdeb0 KH |
4396 | buffer_slot_type_mismatch (offset) |
4397 | int offset; | |
0fa3ba92 | 4398 | { |
54dfdeb0 | 4399 | Lisp_Object sym; |
0fa3ba92 | 4400 | char *type_name; |
177c0ea7 | 4401 | |
7313acd0 | 4402 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4403 | { |
7c02e886 GM |
4404 | case Lisp_Int: |
4405 | type_name = "integers"; | |
4406 | break; | |
177c0ea7 | 4407 | |
7c02e886 GM |
4408 | case Lisp_String: |
4409 | type_name = "strings"; | |
4410 | break; | |
177c0ea7 | 4411 | |
7c02e886 GM |
4412 | case Lisp_Symbol: |
4413 | type_name = "symbols"; | |
4414 | break; | |
177c0ea7 | 4415 | |
0fa3ba92 JB |
4416 | default: |
4417 | abort (); | |
4418 | } | |
4419 | ||
7313acd0 | 4420 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4421 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4422 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4423 | } |
7c02e886 | 4424 | |
0fa3ba92 | 4425 | \f |
b86af064 GM |
4426 | /*********************************************************************** |
4427 | Allocation with mmap | |
4428 | ***********************************************************************/ | |
4429 | ||
4430 | #ifdef USE_MMAP_FOR_BUFFERS | |
4431 | ||
4432 | #include <sys/types.h> | |
4433 | #include <sys/mman.h> | |
4434 | ||
4435 | #ifndef MAP_ANON | |
4436 | #ifdef MAP_ANONYMOUS | |
4437 | #define MAP_ANON MAP_ANONYMOUS | |
4438 | #else | |
4439 | #define MAP_ANON 0 | |
4440 | #endif | |
4441 | #endif | |
4442 | ||
09dfdf85 GM |
4443 | #ifndef MAP_FAILED |
4444 | #define MAP_FAILED ((void *) -1) | |
4445 | #endif | |
4446 | ||
b86af064 GM |
4447 | #include <stdio.h> |
4448 | #include <errno.h> | |
4449 | ||
4450 | #if MAP_ANON == 0 | |
4451 | #include <fcntl.h> | |
4452 | #endif | |
4453 | ||
4454 | #include "coding.h" | |
4455 | ||
4456 | ||
4457 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4458 | The current implementation lets the system select mapped | |
4459 | addresses; we're not using MAP_FIXED in general, except when | |
4460 | trying to enlarge regions. | |
4461 | ||
4462 | Each mapped region starts with a mmap_region structure, the user | |
4463 | area starts after that structure, aligned to MEM_ALIGN. | |
4464 | ||
4465 | +-----------------------+ | |
4466 | | struct mmap_info + | | |
4467 | | padding | | |
4468 | +-----------------------+ | |
4469 | | user data | | |
4470 | | | | |
4471 | | | | |
4472 | +-----------------------+ */ | |
4473 | ||
4474 | struct mmap_region | |
4475 | { | |
4476 | /* User-specified size. */ | |
4477 | size_t nbytes_specified; | |
177c0ea7 | 4478 | |
b86af064 GM |
4479 | /* Number of bytes mapped */ |
4480 | size_t nbytes_mapped; | |
4481 | ||
4482 | /* Pointer to the location holding the address of the memory | |
4483 | allocated with the mmap'd block. The variable actually points | |
4484 | after this structure. */ | |
4485 | POINTER_TYPE **var; | |
4486 | ||
4487 | /* Next and previous in list of all mmap'd regions. */ | |
4488 | struct mmap_region *next, *prev; | |
4489 | }; | |
4490 | ||
4491 | /* Doubly-linked list of mmap'd regions. */ | |
4492 | ||
4493 | static struct mmap_region *mmap_regions; | |
4494 | ||
4495 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4496 | /dev/zero will be opened on it. */ | |
4497 | ||
4498 | static int mmap_fd; | |
4499 | ||
4500 | /* Temporary storage for mmap_set_vars, see there. */ | |
4501 | ||
4502 | static struct mmap_region *mmap_regions_1; | |
4503 | static int mmap_fd_1; | |
4504 | ||
4505 | /* Page size on this system. */ | |
4506 | ||
4507 | static int mmap_page_size; | |
4508 | ||
4509 | /* 1 means mmap has been intialized. */ | |
4510 | ||
4511 | static int mmap_initialized_p; | |
4512 | ||
4513 | /* Value is X rounded up to the next multiple of N. */ | |
4514 | ||
4515 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4516 | ||
4517 | /* Size of mmap_region structure plus padding. */ | |
4518 | ||
4519 | #define MMAP_REGION_STRUCT_SIZE \ | |
4520 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4521 | ||
4522 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4523 | region, return a pointer to the start of the region. */ | |
4524 | ||
4525 | #define MMAP_REGION(P) \ | |
4526 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4527 | ||
4528 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4529 | to the start of the user-visible part of the region. */ | |
4530 | ||
4531 | #define MMAP_USER_AREA(P) \ | |
4532 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4533 | ||
4534 | #define MEM_ALIGN sizeof (double) | |
4535 | ||
7273faa1 DL |
4536 | /* Predicate returning true if part of the address range [START .. END] |
4537 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4538 | memory mapping. |
4539 | ||
4540 | Default is to conservativly assume the address range is occupied by | |
4541 | something else. This can be overridden by system configuration | |
4542 | files if system-specific means to determine this exists. */ | |
4543 | ||
4544 | #ifndef MMAP_ALLOCATED_P | |
4545 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4546 | #endif | |
4547 | ||
b86af064 GM |
4548 | /* Function prototypes. */ |
4549 | ||
4550 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4551 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4552 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4553 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4554 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4555 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4556 | static void mmap_init P_ ((void)); | |
4557 | ||
4558 | ||
4559 | /* Return a region overlapping address range START...END, or null if | |
4560 | none. END is not including, i.e. the last byte in the range | |
4561 | is at END - 1. */ | |
4562 | ||
4563 | static struct mmap_region * | |
4564 | mmap_find (start, end) | |
4565 | POINTER_TYPE *start, *end; | |
4566 | { | |
4567 | struct mmap_region *r; | |
4568 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4569 | |
b86af064 GM |
4570 | for (r = mmap_regions; r; r = r->next) |
4571 | { | |
4572 | char *rstart = (char *) r; | |
4573 | char *rend = rstart + r->nbytes_mapped; | |
4574 | ||
4575 | if (/* First byte of range, i.e. START, in this region? */ | |
4576 | (s >= rstart && s < rend) | |
4577 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4578 | || (e > rstart && e <= rend) | |
4579 | /* First byte of this region in the range? */ | |
4580 | || (rstart >= s && rstart < e) | |
4581 | /* Last byte of this region in the range? */ | |
4582 | || (rend > s && rend <= e)) | |
4583 | break; | |
4584 | } | |
4585 | ||
4586 | return r; | |
4587 | } | |
4588 | ||
4589 | ||
4590 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4591 | the region. Value is non-zero if successful. */ | |
4592 | ||
4593 | static int | |
4594 | mmap_free_1 (r) | |
4595 | struct mmap_region *r; | |
4596 | { | |
4597 | if (r->next) | |
4598 | r->next->prev = r->prev; | |
4599 | if (r->prev) | |
4600 | r->prev->next = r->next; | |
4601 | else | |
4602 | mmap_regions = r->next; | |
177c0ea7 | 4603 | |
1a15cca0 | 4604 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4605 | { |
4606 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4607 | return 0; | |
4608 | } | |
4609 | ||
4610 | return 1; | |
4611 | } | |
4612 | ||
4613 | ||
4614 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4615 | Value is non-zero if successful. */ | |
4616 | ||
4617 | static int | |
4618 | mmap_enlarge (r, npages) | |
4619 | struct mmap_region *r; | |
4620 | int npages; | |
4621 | { | |
4622 | char *region_end = (char *) r + r->nbytes_mapped; | |
4623 | size_t nbytes; | |
4624 | int success = 0; | |
4625 | ||
4626 | if (npages < 0) | |
4627 | { | |
4628 | /* Unmap pages at the end of the region. */ | |
4629 | nbytes = - npages * mmap_page_size; | |
4630 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4631 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4632 | else | |
4633 | { | |
4634 | r->nbytes_mapped -= nbytes; | |
4635 | success = 1; | |
4636 | } | |
4637 | } | |
4638 | else if (npages > 0) | |
4639 | { | |
b86af064 | 4640 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4641 | |
b86af064 GM |
4642 | /* Try to map additional pages at the end of the region. We |
4643 | cannot do this if the address range is already occupied by | |
4644 | something else because mmap deletes any previous mapping. | |
4645 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4646 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4647 | { |
4648 | POINTER_TYPE *p; | |
177c0ea7 | 4649 | |
b86af064 GM |
4650 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4651 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4652 | if (p == MAP_FAILED) | |
edaa9aed | 4653 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4654 | else if (p != (POINTER_TYPE *) region_end) |
4655 | { | |
4656 | /* Kernels are free to choose a different address. In | |
4657 | that case, unmap what we've mapped above; we have | |
4658 | no use for it. */ | |
4659 | if (munmap (p, nbytes) == -1) | |
4660 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4661 | } | |
4662 | else | |
4663 | { | |
4664 | r->nbytes_mapped += nbytes; | |
4665 | success = 1; | |
4666 | } | |
4667 | } | |
4668 | } | |
4669 | ||
4670 | return success; | |
4671 | } | |
4672 | ||
4673 | ||
4674 | /* Set or reset variables holding references to mapped regions. If | |
4675 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4676 | non-zero, set all variables to the start of the user-areas | |
4677 | of mapped regions. | |
4678 | ||
4679 | This function is called from Fdump_emacs to ensure that the dumped | |
4680 | Emacs doesn't contain references to memory that won't be mapped | |
4681 | when Emacs starts. */ | |
4682 | ||
4683 | void | |
4684 | mmap_set_vars (restore_p) | |
4685 | int restore_p; | |
4686 | { | |
4687 | struct mmap_region *r; | |
4688 | ||
4689 | if (restore_p) | |
4690 | { | |
4691 | mmap_regions = mmap_regions_1; | |
4692 | mmap_fd = mmap_fd_1; | |
4693 | for (r = mmap_regions; r; r = r->next) | |
4694 | *r->var = MMAP_USER_AREA (r); | |
4695 | } | |
4696 | else | |
4697 | { | |
4698 | for (r = mmap_regions; r; r = r->next) | |
4699 | *r->var = NULL; | |
4700 | mmap_regions_1 = mmap_regions; | |
4701 | mmap_regions = NULL; | |
4702 | mmap_fd_1 = mmap_fd; | |
4703 | mmap_fd = -1; | |
4704 | } | |
4705 | } | |
4706 | ||
4707 | ||
4708 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4709 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4710 | address of some variable which will use the data area. | |
4711 | ||
4712 | The allocation of 0 bytes is valid. | |
4713 | ||
4714 | If we can't allocate the necessary memory, set *VAR to null, and | |
4715 | return null. */ | |
4716 | ||
4717 | static POINTER_TYPE * | |
4718 | mmap_alloc (var, nbytes) | |
4719 | POINTER_TYPE **var; | |
4720 | size_t nbytes; | |
4721 | { | |
4722 | void *p; | |
4723 | size_t map; | |
4724 | ||
4725 | mmap_init (); | |
4726 | ||
4727 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4728 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4729 | mmap_fd, 0); | |
177c0ea7 | 4730 | |
b86af064 GM |
4731 | if (p == MAP_FAILED) |
4732 | { | |
4733 | if (errno != ENOMEM) | |
4734 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4735 | p = NULL; | |
4736 | } | |
4737 | else | |
4738 | { | |
4739 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4740 | |
b86af064 GM |
4741 | r->nbytes_specified = nbytes; |
4742 | r->nbytes_mapped = map; | |
4743 | r->var = var; | |
4744 | r->prev = NULL; | |
4745 | r->next = mmap_regions; | |
4746 | if (r->next) | |
4747 | r->next->prev = r; | |
4748 | mmap_regions = r; | |
177c0ea7 | 4749 | |
b86af064 GM |
4750 | p = MMAP_USER_AREA (p); |
4751 | } | |
177c0ea7 | 4752 | |
b86af064 GM |
4753 | return *var = p; |
4754 | } | |
4755 | ||
4756 | ||
4757 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4758 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4759 | and return this value. If more memory cannot be allocated, then | |
4760 | leave *VAR unchanged, and return null. */ | |
4761 | ||
4762 | static POINTER_TYPE * | |
4763 | mmap_realloc (var, nbytes) | |
4764 | POINTER_TYPE **var; | |
4765 | size_t nbytes; | |
4766 | { | |
4767 | POINTER_TYPE *result; | |
177c0ea7 | 4768 | |
b86af064 GM |
4769 | mmap_init (); |
4770 | ||
4771 | if (*var == NULL) | |
4772 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4773 | else if (nbytes == 0) |
b86af064 GM |
4774 | { |
4775 | mmap_free (var); | |
4776 | result = mmap_alloc (var, nbytes); | |
4777 | } | |
4778 | else | |
4779 | { | |
4780 | struct mmap_region *r = MMAP_REGION (*var); | |
4781 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4782 | |
b86af064 GM |
4783 | if (room < nbytes) |
4784 | { | |
4785 | /* Must enlarge. */ | |
4786 | POINTER_TYPE *old_ptr = *var; | |
4787 | ||
4788 | /* Try to map additional pages at the end of the region. | |
4789 | If that fails, allocate a new region, copy data | |
4790 | from the old region, then free it. */ | |
4791 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4792 | / mmap_page_size))) | |
4793 | { | |
4794 | r->nbytes_specified = nbytes; | |
4795 | *var = result = old_ptr; | |
4796 | } | |
4797 | else if (mmap_alloc (var, nbytes)) | |
4798 | { | |
4799 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4800 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4801 | result = *var; | |
4802 | r = MMAP_REGION (result); | |
4803 | r->nbytes_specified = nbytes; | |
4804 | } | |
4805 | else | |
4806 | { | |
4807 | *var = old_ptr; | |
4808 | result = NULL; | |
4809 | } | |
4810 | } | |
4811 | else if (room - nbytes >= mmap_page_size) | |
4812 | { | |
4813 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4814 | memory back to the system. |
4815 | ||
4816 | The extra parens are to make the division happens first, | |
4817 | on positive values, so we know it will round towards | |
4818 | zero. */ | |
bb63c5c9 | 4819 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4820 | result = *var; |
4821 | r->nbytes_specified = nbytes; | |
4822 | } | |
4823 | else | |
4824 | { | |
4825 | /* Leave it alone. */ | |
4826 | result = *var; | |
4827 | r->nbytes_specified = nbytes; | |
4828 | } | |
4829 | } | |
4830 | ||
4831 | return result; | |
4832 | } | |
4833 | ||
4834 | ||
4835 | /* Free a block of relocatable storage whose data is pointed to by | |
4836 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4837 | ||
4838 | static void | |
4839 | mmap_free (var) | |
4840 | POINTER_TYPE **var; | |
4841 | { | |
4842 | mmap_init (); | |
177c0ea7 | 4843 | |
b86af064 GM |
4844 | if (*var) |
4845 | { | |
4846 | mmap_free_1 (MMAP_REGION (*var)); | |
4847 | *var = NULL; | |
4848 | } | |
4849 | } | |
4850 | ||
4851 | ||
4852 | /* Perform necessary intializations for the use of mmap. */ | |
4853 | ||
4854 | static void | |
4855 | mmap_init () | |
4856 | { | |
4857 | #if MAP_ANON == 0 | |
4858 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4859 | in a dumped Emacs. */ | |
4860 | if (mmap_fd <= 0) | |
4861 | { | |
4862 | /* No anonymous mmap -- we need the file descriptor. */ | |
4863 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4864 | if (mmap_fd == -1) | |
4865 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4866 | } | |
4867 | #endif /* MAP_ANON == 0 */ | |
4868 | ||
4869 | if (mmap_initialized_p) | |
4870 | return; | |
4871 | mmap_initialized_p = 1; | |
177c0ea7 | 4872 | |
b86af064 GM |
4873 | #if MAP_ANON != 0 |
4874 | mmap_fd = -1; | |
4875 | #endif | |
177c0ea7 | 4876 | |
b86af064 GM |
4877 | mmap_page_size = getpagesize (); |
4878 | } | |
4879 | ||
4880 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4881 | ||
4882 | ||
4883 | \f | |
4884 | /*********************************************************************** | |
4885 | Buffer-text Allocation | |
4886 | ***********************************************************************/ | |
4887 | ||
4888 | #ifdef REL_ALLOC | |
4889 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4890 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4891 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4892 | #endif /* REL_ALLOC */ | |
4893 | ||
4894 | ||
4895 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4896 | ||
4897 | static void | |
4898 | alloc_buffer_text (b, nbytes) | |
4899 | struct buffer *b; | |
4900 | size_t nbytes; | |
4901 | { | |
4902 | POINTER_TYPE *p; | |
177c0ea7 | 4903 | |
b86af064 GM |
4904 | BLOCK_INPUT; |
4905 | #if defined USE_MMAP_FOR_BUFFERS | |
4906 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4907 | #elif defined REL_ALLOC | |
4908 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4909 | #else | |
815add84 | 4910 | p = xmalloc (nbytes); |
b86af064 | 4911 | #endif |
177c0ea7 | 4912 | |
b86af064 GM |
4913 | if (p == NULL) |
4914 | { | |
4915 | UNBLOCK_INPUT; | |
4916 | memory_full (); | |
4917 | } | |
4918 | ||
4919 | b->text->beg = (unsigned char *) p; | |
4920 | UNBLOCK_INPUT; | |
4921 | } | |
4922 | ||
4923 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4924 | shrink it. */ | |
4925 | ||
4926 | void | |
4927 | enlarge_buffer_text (b, delta) | |
4928 | struct buffer *b; | |
4929 | int delta; | |
4930 | { | |
4931 | POINTER_TYPE *p; | |
4932 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4933 | + delta); | |
4934 | BLOCK_INPUT; | |
4935 | #if defined USE_MMAP_FOR_BUFFERS | |
4936 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4937 | #elif defined REL_ALLOC | |
4938 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4939 | #else | |
4940 | p = xrealloc (b->text->beg, nbytes); | |
4941 | #endif | |
177c0ea7 | 4942 | |
b86af064 GM |
4943 | if (p == NULL) |
4944 | { | |
4945 | UNBLOCK_INPUT; | |
4946 | memory_full (); | |
4947 | } | |
4948 | ||
4949 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4950 | UNBLOCK_INPUT; | |
4951 | } | |
4952 | ||
4953 | ||
4954 | /* Free buffer B's text buffer. */ | |
4955 | ||
4956 | static void | |
4957 | free_buffer_text (b) | |
4958 | struct buffer *b; | |
4959 | { | |
4960 | BLOCK_INPUT; | |
4961 | ||
4962 | #if defined USE_MMAP_FOR_BUFFERS | |
4963 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4964 | #elif defined REL_ALLOC | |
4965 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4966 | #else | |
4967 | xfree (b->text->beg); | |
4968 | #endif | |
177c0ea7 | 4969 | |
b86af064 GM |
4970 | BUF_BEG_ADDR (b) = NULL; |
4971 | UNBLOCK_INPUT; | |
4972 | } | |
4973 | ||
4974 | ||
4975 | \f | |
4976 | /*********************************************************************** | |
4977 | Initialization | |
4978 | ***********************************************************************/ | |
4979 | ||
dfcf069d | 4980 | void |
1ab256cb RM |
4981 | init_buffer_once () |
4982 | { | |
7c02e886 GM |
4983 | int idx; |
4984 | ||
4985 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4986 | |
1ab256cb RM |
4987 | /* Make sure all markable slots in buffer_defaults |
4988 | are initialized reasonably, so mark_buffer won't choke. */ | |
4989 | reset_buffer (&buffer_defaults); | |
13de9290 | 4990 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4991 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4992 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4993 | /* Prevent GC from getting confused. */ |
4994 | buffer_defaults.text = &buffer_defaults.own_text; | |
4995 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4996 | BUF_INTERVALS (&buffer_defaults) = 0; |
4997 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4998 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4999 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
5000 | |
5001 | /* Set up the default values of various buffer slots. */ | |
5002 | /* Must do these before making the first buffer! */ | |
5003 | ||
f532dca0 | 5004 | /* real setup is done in bindings.el */ |
1ab256cb | 5005 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 5006 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5007 | buffer_defaults.abbrev_mode = Qnil; |
5008 | buffer_defaults.overwrite_mode = Qnil; | |
5009 | buffer_defaults.case_fold_search = Qt; | |
5010 | buffer_defaults.auto_fill_function = Qnil; | |
5011 | buffer_defaults.selective_display = Qnil; | |
5012 | #ifndef old | |
5013 | buffer_defaults.selective_display_ellipses = Qt; | |
5014 | #endif | |
5015 | buffer_defaults.abbrev_table = Qnil; | |
5016 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5017 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5018 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5019 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5020 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5021 | buffer_defaults.overlays_before = NULL; |
5022 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5023 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5024 | |
8d7a4592 | 5025 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
5026 | buffer_defaults.truncate_lines = Qnil; |
5027 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 5028 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 5029 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5030 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5031 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5032 | |
f7975d07 | 5033 | #ifdef DOS_NT |
0776cb1b | 5034 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5035 | #endif |
a1a17b61 | 5036 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5037 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5038 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5039 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5040 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5041 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5042 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5043 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5044 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5045 | buffer_defaults.left_fringe_width = Qnil; | |
5046 | buffer_defaults.right_fringe_width = Qnil; | |
5047 | buffer_defaults.fringes_outside_margins = Qnil; | |
5048 | buffer_defaults.scroll_bar_width = Qnil; | |
5049 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5050 | buffer_defaults.indicate_empty_lines = Qnil; |
8e8767f8 | 5051 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5052 | buffer_defaults.fringe_indicator_alist = Qnil; |
5053 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5054 | buffer_defaults.scroll_up_aggressively = Qnil; |
5055 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5056 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5057 | |
5058 | /* Assign the local-flags to the slots that have default values. | |
5059 | The local flag is a bit that is used in the buffer | |
5060 | to say that it has its own local value for the slot. | |
5061 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5062 | ||
5063 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5064 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5065 | |
5066 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5067 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5068 | XSETINT (buffer_local_flags.filename, -1); |
5069 | XSETINT (buffer_local_flags.directory, -1); | |
5070 | XSETINT (buffer_local_flags.backed_up, -1); | |
5071 | XSETINT (buffer_local_flags.save_length, -1); | |
5072 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5073 | XSETINT (buffer_local_flags.read_only, -1); | |
5074 | XSETINT (buffer_local_flags.major_mode, -1); | |
5075 | XSETINT (buffer_local_flags.mode_name, -1); | |
5076 | XSETINT (buffer_local_flags.undo_list, -1); | |
5077 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5078 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5079 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5080 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5081 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5082 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5083 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5084 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5085 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5086 | |
7c02e886 GM |
5087 | idx = 1; |
5088 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5089 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5090 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5091 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5092 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5093 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5094 | #ifndef old |
7c02e886 | 5095 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5096 | #endif |
7c02e886 GM |
5097 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5098 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5099 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5100 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5101 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5102 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5103 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5104 | #ifdef DOS_NT |
7c02e886 | 5105 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5106 | /* Make this one a permanent local. */ |
7c02e886 | 5107 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5108 | #endif |
7c02e886 GM |
5109 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5110 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5111 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5112 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5113 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5114 | /* Make this one a permanent local. */ |
7c02e886 | 5115 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5116 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5117 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5118 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5119 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5120 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5121 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5122 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5123 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
8e8767f8 | 5124 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5125 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5126 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5127 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5128 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5129 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5130 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5131 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5132 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5133 | |
5134 | /* Need more room? */ | |
7313acd0 | 5135 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5136 | abort (); |
7313acd0 | 5137 | last_per_buffer_idx = idx; |
177c0ea7 | 5138 | |
1ab256cb RM |
5139 | Vbuffer_alist = Qnil; |
5140 | current_buffer = 0; | |
5141 | all_buffers = 0; | |
5142 | ||
5143 | QSFundamental = build_string ("Fundamental"); | |
5144 | ||
5145 | Qfundamental_mode = intern ("fundamental-mode"); | |
5146 | buffer_defaults.major_mode = Qfundamental_mode; | |
5147 | ||
5148 | Qmode_class = intern ("mode-class"); | |
5149 | ||
5150 | Qprotected_field = intern ("protected-field"); | |
5151 | ||
5152 | Qpermanent_local = intern ("permanent-local"); | |
5153 | ||
5154 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5155 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5156 | |
48265e61 DL |
5157 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5158 | ||
1ab256cb | 5159 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5160 | |
1ab256cb RM |
5161 | /* super-magic invisible buffer */ |
5162 | Vbuffer_alist = Qnil; | |
5163 | ||
ffd56f97 | 5164 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5165 | |
5166 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5167 | } |
5168 | ||
dfcf069d | 5169 | void |
1ab256cb RM |
5170 | init_buffer () |
5171 | { | |
2381d133 | 5172 | char *pwd; |
136351b7 | 5173 | Lisp_Object temp; |
b639c9be | 5174 | int len; |
1ab256cb | 5175 | |
b86af064 | 5176 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5177 | { |
5178 | /* When using the ralloc implementation based on mmap(2), buffer | |
5179 | text pointers will have been set to null in the dumped Emacs. | |
5180 | Map new memory. */ | |
5181 | struct buffer *b; | |
177c0ea7 | 5182 | |
93c27ef1 GM |
5183 | for (b = all_buffers; b; b = b->next) |
5184 | if (b->text->beg == NULL) | |
b86af064 | 5185 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5186 | } |
b86af064 | 5187 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5188 | |
1ab256cb | 5189 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5190 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5191 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5192 | |
01537133 | 5193 | pwd = get_current_dir_name (); |
a17b5ed1 | 5194 | |
156bdb41 | 5195 | if (!pwd) |
a17b5ed1 | 5196 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb RM |
5197 | |
5198 | #ifndef VMS | |
5199 | /* Maybe this should really use some standard subroutine | |
5200 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5201 | len = strlen (pwd); |
5202 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5203 | { |
156bdb41 | 5204 | /* Grow buffer to add directory separator and '\0'. */ |
b639c9be RF |
5205 | pwd = (char *) xrealloc (pwd, len + 2); |
5206 | pwd[len] = DIRECTORY_SEP; | |
5207 | pwd[len + 1] = '\0'; | |
f7975d07 | 5208 | } |
1ab256cb | 5209 | #endif /* not VMS */ |
0995fa35 | 5210 | |
01537133 | 5211 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5212 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5213 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5214 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5215 | that ENCODE_FILE correctly gets the original bytes. */ |
5216 | current_buffer->directory | |
5217 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5218 | |
0995fa35 RS |
5219 | /* Add /: to the front of the name |
5220 | if it would otherwise be treated as magic. */ | |
5221 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5222 | if (! NILP (temp) |
5223 | /* If the default dir is just /, TEMP is non-nil | |
5224 | because of the ange-ftp completion handler. | |
5225 | However, it is not necessary to turn / into /:/. | |
5226 | So avoid doing that. */ | |
d5db4077 | 5227 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5228 | current_buffer->directory |
5229 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5230 | ||
136351b7 RS |
5231 | temp = get_minibuffer (0); |
5232 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5233 | |
5234 | free (pwd); | |
1ab256cb RM |
5235 | } |
5236 | ||
5237 | /* initialize the buffer routines */ | |
dfcf069d | 5238 | void |
1ab256cb RM |
5239 | syms_of_buffer () |
5240 | { | |
9115729e KH |
5241 | staticpro (&last_overlay_modification_hooks); |
5242 | last_overlay_modification_hooks | |
5243 | = Fmake_vector (make_number (10), Qnil); | |
5244 | ||
1ab256cb RM |
5245 | staticpro (&Vbuffer_defaults); |
5246 | staticpro (&Vbuffer_local_symbols); | |
5247 | staticpro (&Qfundamental_mode); | |
5248 | staticpro (&Qmode_class); | |
5249 | staticpro (&QSFundamental); | |
5250 | staticpro (&Vbuffer_alist); | |
5251 | staticpro (&Qprotected_field); | |
5252 | staticpro (&Qpermanent_local); | |
5253 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5254 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5255 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5256 | Qevaporate = intern ("evaporate"); |
5257 | staticpro (&Qevaporate); | |
294d215f | 5258 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5259 | staticpro (&Qmodification_hooks); |
294d215f | 5260 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5261 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5262 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5263 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5264 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5265 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5266 | Qpriority = intern ("priority"); |
5267 | staticpro (&Qpriority); | |
5268 | Qwindow = intern ("window"); | |
5269 | staticpro (&Qwindow); | |
bbbe9545 KH |
5270 | Qbefore_string = intern ("before-string"); |
5271 | staticpro (&Qbefore_string); | |
5272 | Qafter_string = intern ("after-string"); | |
5273 | staticpro (&Qafter_string); | |
22378665 RS |
5274 | Qfirst_change_hook = intern ("first-change-hook"); |
5275 | staticpro (&Qfirst_change_hook); | |
5276 | Qbefore_change_functions = intern ("before-change-functions"); | |
5277 | staticpro (&Qbefore_change_functions); | |
5278 | Qafter_change_functions = intern ("after-change-functions"); | |
5279 | staticpro (&Qafter_change_functions); | |
48265e61 | 5280 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5281 | |
5b20caf0 RS |
5282 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5283 | staticpro (&Qkill_buffer_query_functions); | |
5284 | ||
1ab256cb RM |
5285 | Fput (Qprotected_field, Qerror_conditions, |
5286 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5287 | Fput (Qprotected_field, Qerror_message, | |
5288 | build_string ("Attempt to modify a protected field")); | |
5289 | ||
5290 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5291 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5292 | ||
5293 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5294 | &buffer_defaults.mode_line_format, |
5295 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5296 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5297 | |
045dee35 | 5298 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5299 | &buffer_defaults.header_line_format, |
5300 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5301 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5302 | |
7ee72033 MB |
5303 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5304 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5305 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5306 | |
a3bbced0 | 5307 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5308 | &buffer_defaults.extra_line_spacing, |
5309 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5310 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5311 | |
187ccf49 KS |
5312 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5313 | &buffer_defaults.cursor_in_non_selected_windows, | |
5314 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5315 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5316 | ||
1ab256cb | 5317 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5318 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5319 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5320 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5321 | |
5322 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5323 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5324 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5325 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5326 | |
5e2ad10b JB |
5327 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5328 | &buffer_defaults.direction_reversed, | |
5329 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5330 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5331 | |
5e2ad10b JB |
5332 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5333 | &buffer_defaults.enable_multibyte_characters, | |
5334 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5335 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5336 | |
5e2ad10b JB |
5337 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5338 | &buffer_defaults.buffer_file_coding_system, | |
5339 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5340 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5341 | |
1ab256cb | 5342 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5343 | &buffer_defaults.truncate_lines, |
5344 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5345 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5346 | |
5347 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5348 | &buffer_defaults.fill_column, |
5349 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5350 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5351 | |
5352 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5353 | &buffer_defaults.left_margin, |
5354 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5355 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5356 | |
5357 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
7ee72033 MB |
5358 | &buffer_defaults.tab_width, |
5359 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5360 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5361 | |
5362 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5363 | &buffer_defaults.case_fold_search, |
5364 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5365 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5366 | |
f7975d07 | 5367 | #ifdef DOS_NT |
177c0ea7 | 5368 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5369 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5370 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5371 | This is the same as (default-value 'buffer-file-type). |
5372 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5373 | #endif |
5374 | ||
0552666b | 5375 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5376 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5377 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5378 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5379 | |
5380 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5381 | &buffer_defaults.right_margin_cols, |
5382 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5383 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5384 | |
2ad8731a KS |
5385 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5386 | &buffer_defaults.left_fringe_width, | |
5387 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5388 | This is the same as (default-value 'left-fringe-width). */); | |
5389 | ||
5390 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5391 | &buffer_defaults.right_fringe_width, | |
5392 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5393 | This is the same as (default-value 'right-fringe-width). */); | |
5394 | ||
5395 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5396 | &buffer_defaults.fringes_outside_margins, | |
5397 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5398 | This is the same as (default-value 'fringes-outside-margins). */); | |
5399 | ||
5400 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5401 | &buffer_defaults.scroll_bar_width, | |
5402 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5403 | This is the same as (default-value 'scroll-bar-width). */); | |
5404 | ||
5405 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5406 | &buffer_defaults.vertical_scroll_bar_type, | |
5407 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5408 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5409 | ||
0552666b | 5410 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5411 | &buffer_defaults.indicate_empty_lines, |
5412 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5413 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5414 | |
8e8767f8 KS |
5415 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5416 | &buffer_defaults.indicate_buffer_boundaries, | |
5417 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5418 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5419 | ||
c6a46372 KS |
5420 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5421 | &buffer_defaults.fringe_indicator_alist, | |
5422 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5423 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5424 | ||
5425 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5426 | &buffer_defaults.fringe_cursor_alist, | |
5427 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5428 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5429 | ||
0552666b | 5430 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5431 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5432 | doc: /* Default value of `scroll-up-aggressively'. |
5433 | This value applies in buffers that don't have their own local values. | |
5434 | This variable is an alias for (default-value 'scroll-up-aggressively). */); | |
177c0ea7 | 5435 | |
0552666b | 5436 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5437 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5438 | doc: /* Default value of `scroll-down-aggressively'. |
5439 | This value applies in buffers that don't have their own local values. | |
5440 | This variable is an alias for (default-value 'scroll-down-aggressively). */); | |
177c0ea7 | 5441 | |
045dee35 | 5442 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5443 | ¤t_buffer->header_line_format, |
7ee72033 | 5444 | Qnil, |
7614d762 RS |
5445 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5446 | The header line appears, optionally, at the top of a window; | |
5447 | the mode line appears at the bottom. */); | |
177c0ea7 | 5448 | |
1ab256cb | 5449 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5450 | Qnil, |
5451 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5452 | Each buffer has its own value of this variable. |
5453 | Value may be nil, a string, a symbol or a list or cons cell. | |
5454 | A value of nil means don't display a mode line. | |
5455 | For a symbol, its value is used (but it is ignored if t or nil). | |
5456 | A string appearing directly as the value of a symbol is processed verbatim | |
5457 | in that the %-constructs below are not recognized. | |
ed463255 | 5458 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5459 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5460 | in the value of that symbol will be ignored. |
018ba359 | 5461 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5462 | is used as a mode line element. Be careful--FORM should not load any files, |
5463 | because that can cause an infinite recursion. | |
ed463255 KS |
5464 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5465 | with the specified properties PROPS applied. | |
018ba359 PJ |
5466 | For a list whose car is a symbol, the symbol's value is taken, |
5467 | and if that is non-nil, the cadr of the list is processed recursively. | |
5468 | Otherwise, the caddr of the list (if there is one) is processed. | |
5469 | For a list whose car is a string or list, each element is processed | |
5470 | recursively and the results are effectively concatenated. | |
5471 | For a list whose car is an integer, the cdr of the list is processed | |
5472 | and padded (if the number is positive) or truncated (if negative) | |
5473 | to the width specified by that number. | |
5474 | A string is printed verbatim in the mode line except for %-constructs: | |
5475 | (%-constructs are allowed when the string is the entire mode-line-format | |
5476 | or when it is found in a cons-cell or a list) | |
5477 | %b -- print buffer name. %f -- print visited file name. | |
5478 | %F -- print frame name. | |
5479 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5480 | %& is like %*, but ignore read-only-ness. | |
5481 | % means buffer is read-only and * means it is modified. | |
5482 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5483 | %s -- print process status. %l -- print the current line number. | |
5484 | %c -- print the current column number (this makes editing slower). | |
5485 | To make the column number update correctly in all cases, | |
5486 | `column-number-mode' must be non-nil. | |
77d31fb4 LK |
5487 | %i -- print the size of the buffer. |
5488 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5489 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5490 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5491 | or print Bottom or All. | |
018ba359 | 5492 | %n -- print Narrow if appropriate. |
dafbe726 | 5493 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5494 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5495 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5496 | %e -- print error message about full memory. |
018ba359 PJ |
5497 | %[ -- print one [ for each recursive editing level. %] similar. |
5498 | %% -- print %. %- -- print infinitely many dashes. | |
5499 | Decimal digits after the % specify field width to which to pad. */); | |
5500 | ||
7ee72033 | 5501 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5502 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
557ca2c1 RS |
5503 | nil here means use current buffer's major mode, provided it is not |
5504 | marked as "special". | |
5505 | ||
5506 | When a mode is used by default, `find-file' switches to it | |
5507 | before it reads the contents into the buffer and before | |
5508 | it finishes setting up the buffer. Thus, the mode and | |
5509 | its hooks should not expect certain variables such as | |
5510 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5511 | |
5512 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5513 | make_number (Lisp_Symbol), |
efc7e75f | 5514 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5515 | |
5516 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5517 | Qnil, |
efc7e75f | 5518 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5519 | |
7ee72033 | 5520 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5521 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5522 | |
5523 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5524 | Qnil, |
efc7e75f | 5525 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5526 | |
5527 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5528 | make_number (Lisp_Int), |
1ac5826d | 5529 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5530 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5531 | |
5532 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5533 | make_number (Lisp_Int), |
efc7e75f | 5534 | doc: /* *Column for the default indent-line-function to indent to. |
018ba359 | 5535 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5536 | |
5537 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5538 | make_number (Lisp_Int), |
efc7e75f | 5539 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5540 | |
7ee72033 | 5541 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5542 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5543 | A value of nil means use backslash and octal digits. |
5544 | This variable does not apply to characters whose display is specified | |
5545 | in the current display table (if there is one). */); | |
1ab256cb | 5546 | |
3b06f880 | 5547 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5548 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5549 | Qnil, |
efc7e75f | 5550 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5551 | Otherwise they are regarded as unibyte. This affects the display, |
5552 | file I/O and the behavior of various editing commands. | |
5553 | ||
5554 | This variable is buffer-local but you cannot set it directly; | |
5555 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5556 | Changing its default value with `setq-default' is supported. | |
5557 | See also variable `default-enable-multibyte-characters' and Info node | |
5558 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5559 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5560 | |
c71b5d9b | 5561 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5562 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5563 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5564 | This variable applies to saving the buffer, and also to `write-region' |
5565 | and other functions that use `write-region'. | |
5566 | It does not apply to sending output to subprocesses, however. | |
5567 | ||
5568 | If this is nil, the buffer is saved without any code conversion | |
5569 | unless some coding system is specified in `file-coding-system-alist' | |
5570 | for the buffer file. | |
5571 | ||
31a6cb06 EZ |
5572 | If the text to be saved cannot be encoded as specified by this variable, |
5573 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5574 | ||
018ba359 PJ |
5575 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5576 | ||
5577 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5578 | |
3b06f880 | 5579 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5580 | Qnil, |
efc7e75f | 5581 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5582 | |
7ee72033 | 5583 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5584 | doc: /* *Non-nil means do not display continuation lines. |
5585 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5586 | |
5587 | Note that this is overridden by the variable | |
5588 | `truncate-partial-width-windows' if that variable is non-nil | |
5589 | and this buffer is not full-frame width. */); | |
1ab256cb | 5590 | |
f7975d07 | 5591 | #ifdef DOS_NT |
54ad07d3 | 5592 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5593 | Qnil, |
efc7e75f | 5594 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5595 | This variable is meaningful on MS-DOG and Windows NT. |
5596 | On those systems, it is automatically local in every buffer. | |
5597 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5598 | #endif |
5599 | ||
1ab256cb | 5600 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5601 | make_number (Lisp_String), |
efc7e75f | 5602 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5603 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5604 | |
5605 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5606 | Qnil, |
efc7e75f | 5607 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5608 | It is called after self-inserting any character specified in |
5609 | the `auto-fill-chars' table. | |
5610 | NOTE: This variable is not a hook; | |
5611 | its value may not be a list of functions. */); | |
1ab256cb RM |
5612 | |
5613 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5614 | make_number (Lisp_String), |
efc7e75f | 5615 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5616 | |
f6ed2e84 | 5617 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5618 | make_number (Lisp_String), |
efc7e75f | 5619 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5620 | The truename of a file is calculated by `file-truename' |
5621 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5622 | |
1ab256cb | 5623 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5624 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5625 | make_number (Lisp_String), |
7614d762 RS |
5626 | doc: /* Name of file for auto-saving current buffer. |
5627 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5628 | |
7ee72033 | 5629 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5630 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5631 | |
7ee72033 | 5632 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5633 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5634 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5635 | |
5636 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5637 | make_number (Lisp_Int), |
efc7e75f | 5638 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5639 | 0 initially. */); |
1ab256cb RM |
5640 | |
5641 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5642 | Qnil, |
7614d762 RS |
5643 | doc: /* Non-nil enables selective display. |
5644 | An Integer N as value means display only lines | |
5645 | that start with less than n columns of space. | |
5646 | A value of t means that the character ^M makes itself and | |
5647 | all the rest of the line invisible; also, when saving the buffer | |
5648 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5649 | |
5650 | #ifndef old | |
5651 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5652 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5653 | Qnil, |
3f676284 | 5654 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5655 | #endif |
5656 | ||
7ee72033 | 5657 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5658 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5659 | The value should be one of `overwrite-mode-textual', |
5660 | `overwrite-mode-binary', or nil. | |
5661 | If it is `overwrite-mode-textual', self-insertion still | |
5662 | inserts at the end of a line, and inserts when point is before a tab, | |
5663 | until the tab is filled in. | |
5664 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5665 | ||
54939090 | 5666 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5667 | Qnil, |
efc7e75f | 5668 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5669 | |
5670 | If this variable is nil, the value of `standard-display-table' is used. | |
5671 | Each window can have its own, overriding display table, see | |
5672 | `set-window-display-table' and `window-display-table'. | |
5673 | ||
5674 | The display table is a char-table created with `make-display-table'. | |
5675 | A char-table is an array indexed by character codes. Normal array | |
5676 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5677 | ||
5678 | Each of the char-table elements control how to display the corresponding | |
5679 | text character: the element at index C in the table says how to display | |
5680 | the character whose code is C. Each element should be a vector of | |
5681 | characters or nil. nil means display the character in the default fashion; | |
5682 | otherwise, the characters from the vector are delivered to the screen | |
5683 | instead of the original character. | |
5684 | ||
5685 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display | |
5686 | a capital Y instead of each X character. | |
5687 | ||
5688 | In addition, a char-table has six extra slots to control the display of: | |
5689 | ||
5690 | the end of a truncated screen line (extra-slot 0, a single character); | |
5691 | the end of a continued line (extra-slot 1, a single character); | |
5692 | the escape character used to display character codes in octal | |
5693 | (extra-slot 2, a single character); | |
5694 | the character used as an arrow for control characters (extra-slot 3, | |
5695 | a single character); | |
5696 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5697 | a vector of characters); | |
5698 | the character used to draw the border between side-by-side windows | |
5699 | (extra-slot 5, a single character). | |
5700 | ||
5701 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5702 | |
2ad8731a | 5703 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5704 | Qnil, |
efc7e75f | 5705 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5706 | A value of nil means no marginal area. */); |
177c0ea7 | 5707 | |
2ad8731a | 5708 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5709 | Qnil, |
efc7e75f | 5710 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5711 | A value of nil means no marginal area. */); |
177c0ea7 | 5712 | |
2ad8731a KS |
5713 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5714 | Qnil, | |
5715 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5716 | A value of 0 means no left fringe is shown in this buffer's window. | |
5717 | A value of nil means to use the left fringe width from the window's frame. */); | |
5718 | ||
5719 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5720 | Qnil, | |
5721 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5722 | A value of 0 means no right fringe is shown in this buffer's window. | |
5723 | A value of nil means to use the right fringe width from the window's frame. */); | |
5724 | ||
5725 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5726 | Qnil, | |
5727 | doc: /* *Non-nil means to display fringes outside display margins. | |
5728 | A value of nil means to display fringes between margins and buffer text. */); | |
5729 | ||
5730 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5731 | Qnil, | |
5732 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5733 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5734 | ||
5735 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5736 | Qnil, | |
5737 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5738 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5739 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5740 | |
fc2c8887 RS |
5741 | A value of `left' or `right' means put the vertical scroll bar at that side |
5742 | of the window; a value of nil means don't show any vertical scroll bars. | |
5743 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5744 | |
0552666b | 5745 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5746 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5747 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5748 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5749 | window-systems. */); | |
177c0ea7 | 5750 | |
8e8767f8 KS |
5751 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5752 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5753 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
ccbc4331 KS |
5754 | If non-nil, the first and last line of the buffer are marked in the fringe |
5755 | of a window on window-systems with angle bitmaps, or if the window can be | |
5756 | scrolled, the top and bottom line of the window are marked with up and down | |
5757 | arrow bitmaps. | |
b2229037 KS |
5758 | |
5759 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5760 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5761 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5762 | the left fringe but no arrows. |
b2229037 | 5763 | |
79e3497d RS |
5764 | You can exercise more precise control by using an alist as the |
5765 | value. Each alist element (INDICATOR . POSITION) specifies | |
5766 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5767 | `bottom', `up', `down', or t, which specifies the default position, |
5768 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5769 | this indicator. | |
5770 | ||
5771 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5772 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
ccbc4331 | 5773 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5774 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
8e8767f8 | 5775 | |
c6a46372 KS |
5776 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5777 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5778 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5779 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5780 | specifies the fringe bitmaps used to display a specific logical | |
5781 | fringe indicator. | |
5782 | ||
5783 | INDICATOR specifies the logical indicator type which is one of the | |
5784 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
5785 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
5786 | ||
5787 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
5788 | the actual bitmap shown in the left or right fringe for the logical | |
5789 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5790 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
5791 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 5792 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
5793 | symbol which is used in both left and right fringes. */); |
5794 | ||
5795 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5796 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5797 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5798 | The value is an alist where each element (CURSOR . BITMAP) | |
5799 | specifies the fringe bitmaps used to display a specific logical | |
5800 | cursor type in the fringe. | |
5801 | ||
5802 | CURSOR specifies the logical cursor type which is one of the following | |
5803 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5804 | one is used to show a hollow cursor on narrow lines display lines | |
5805 | where the normal hollow cursor will not fit. | |
5806 | ||
5807 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5808 | cursor type. */); | |
5809 | ||
0552666b | 5810 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5811 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5812 | doc: /* How far to scroll windows upward. |
5813 | If you move point off the bottom, the window scrolls automatically. | |
5814 | This variable controls how far it scrolls. nil, the default, | |
5815 | means scroll to center point. A fraction means scroll to put point | |
5816 | that fraction of the window's height from the bottom of the window. | |
5817 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5818 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5819 | point goes at the top, so that in that simple case, the window | |
e5f95d5c | 5820 | scrolls by a full window height. Meaningful values are |
175e9712 | 5821 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5822 | |
0552666b | 5823 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5824 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5825 | doc: /* How far to scroll windows downward. |
5826 | If you move point off the top, the window scrolls automatically. | |
5827 | This variable controls how far it scrolls. nil, the default, | |
5828 | means scroll to center point. A fraction means scroll to put point | |
5829 | that fraction of the window's height from the top of the window. | |
5830 | When the value is 0.0, point goes at the top line, which in the simple | |
5831 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5832 | point goes at the bottom, so that in that simple case, the window | |
e5f95d5c | 5833 | scrolls by a full window height. Meaningful values are |
175e9712 | 5834 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5835 | |
1ab256cb RM |
5836 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5837 | "Don't ask."); | |
5838 | */ | |
1ab256cb | 5839 | |
7ee72033 MB |
5840 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5841 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5842 | Two arguments are passed to each function: the positions of |
5843 | the beginning and end of the range of old text to be changed. | |
5844 | \(For an insertion, the beginning and end are at the same place.) | |
5845 | No information is given about the length of the text after the change. | |
5846 | ||
5847 | Buffer changes made while executing the `before-change-functions' | |
5848 | don't call any before-change or after-change functions. | |
5849 | That's because these variables are temporarily set to nil. | |
5850 | As a result, a hook function cannot straightforwardly alter the value of | |
5851 | these variables. See the Emacs Lisp manual for a way of | |
5852 | accomplishing an equivalent result by using other variables. | |
5853 | ||
5854 | If an unhandled error happens in running these functions, | |
5855 | the variable's value remains nil. That prevents the error | |
5856 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5857 | Vbefore_change_functions = Qnil; |
5858 | ||
7ee72033 | 5859 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5860 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5861 | Three arguments are passed to each function: the positions of |
5862 | the beginning and end of the range of changed text, | |
5863 | and the length in bytes of the pre-change text replaced by that range. | |
5864 | \(For an insertion, the pre-change length is zero; | |
5865 | for a deletion, that length is the number of bytes deleted, | |
5866 | and the post-change beginning and end are at the same place.) | |
5867 | ||
5868 | Buffer changes made while executing the `after-change-functions' | |
5869 | don't call any before-change or after-change functions. | |
5870 | That's because these variables are temporarily set to nil. | |
5871 | As a result, a hook function cannot straightforwardly alter the value of | |
5872 | these variables. See the Emacs Lisp manual for a way of | |
5873 | accomplishing an equivalent result by using other variables. | |
5874 | ||
5875 | If an unhandled error happens in running these functions, | |
5876 | the variable's value remains nil. That prevents the error | |
5877 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5878 | Vafter_change_functions = Qnil; |
5879 | ||
7ee72033 | 5880 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5881 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5882 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5883 | Vfirst_change_hook = Qnil; |
1ab256cb | 5884 | |
7ee72033 MB |
5885 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5886 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5887 | Recent changes come first; older changes follow newer. |
5888 | ||
5889 | An entry (BEG . END) represents an insertion which begins at | |
5890 | position BEG and ends at position END. | |
5891 | ||
5892 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5893 | from (abs POSITION). If POSITION is positive, point was at the front | |
5894 | of the text being deleted; if negative, point was at the end. | |
5895 | ||
5896 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5897 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5898 | of the visited file's modification time, as of that time. If the | |
5899 | modification time of the most recent save is different, this entry is | |
5900 | obsolete. | |
5901 | ||
5902 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5903 | was modified between BEG and END. PROPERTY is the property name, | |
5904 | and VALUE is the old value. | |
5905 | ||
7405f386 KS |
5906 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5907 | \(apply FUN-NAME ARGS). | |
5908 | ||
5909 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5910 | in the active region. BEG and END is the range affected by this entry | |
5911 | and DELTA is the number of bytes added or deleted in that range by | |
5912 | this change. | |
c6c7dc03 | 5913 | |
018ba359 PJ |
5914 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5915 | was adjusted in position by the offset DISTANCE (an integer). | |
5916 | ||
5917 | An entry of the form POSITION indicates that point was at the buffer | |
5918 | location given by the integer. Undoing an entry of this form places | |
5919 | point at POSITION. | |
5920 | ||
b4c4f2f4 JB |
5921 | Entries with value `nil' mark undo boundaries. The undo command treats |
5922 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5923 | |
5924 | If the value of the variable is t, undo information is not recorded. */); | |
5925 | ||
7ee72033 MB |
5926 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5927 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5928 | |
7ee72033 MB |
5929 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5930 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5931 | |
5932 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5933 | newlines. Columnar operations (like `move-to-column' and |
5934 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5935 | widths as they go. This works well for ordinary text, but if the |
5936 | buffer's lines are very long (say, more than 500 characters), these | |
5937 | motion functions will take longer to execute. Emacs may also take | |
5938 | longer to update the display. | |
5939 | ||
5629f29b | 5940 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5941 | results of their scans, and consult the cache to avoid rescanning |
5942 | regions of the buffer until the text is modified. The caches are most | |
5943 | beneficial when they prevent the most searching---that is, when the | |
5944 | buffer contains long lines and large regions of characters with the | |
5945 | same, fixed screen width. | |
5946 | ||
5629f29b | 5947 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5948 | become slightly slower (because of the overhead of consulting the |
5949 | cache), and the caches will use memory roughly proportional to the | |
5950 | number of newlines and characters whose screen width varies. | |
5951 | ||
5952 | The caches require no explicit maintenance; their accuracy is | |
5953 | maintained internally by the Emacs primitives. Enabling or disabling | |
5954 | the cache should not affect the behavior of any of the motion | |
5955 | functions; it should only affect their performance. */); | |
5956 | ||
7ee72033 MB |
5957 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5958 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5959 | |
7ee72033 MB |
5960 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5961 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 5962 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5963 | set when a file is visited. */); |
be9aafdd | 5964 | |
71ed49fa LT |
5965 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
5966 | ¤t_buffer->auto_save_file_format, Qnil, | |
5967 | doc: /* *Format in which to write auto-save files. | |
5968 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5969 | If it is t, which is the default, auto-save files are written in the | |
5970 | same format as a regular save would use. */); | |
5971 | ||
3cb719bd | 5972 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
5973 | ¤t_buffer->invisibility_spec, Qnil, |
5974 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
5975 | The default is t, which means that text is invisible |
5976 | if it has a non-nil `invisible' property. | |
5977 | If the value is a list, a text character is invisible if its `invisible' | |
5978 | property is an element in that list. | |
5979 | If an element is a cons cell of the form (PROP . ELLIPSIS), | |
5980 | then characters with property value PROP are invisible, | |
5981 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5982 | |
7962a441 | 5983 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
5984 | ¤t_buffer->display_count, Qnil, |
5985 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 5986 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5987 | |
5988 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
5989 | ¤t_buffer->display_time, Qnil, |
5990 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
5991 | The function `set-window-buffer' updates this variable |
5992 | to the value obtained by calling `current-time'. | |
5993 | If the buffer has never been shown in a window, the value is nil. */); | |
5994 | ||
7ee72033 MB |
5995 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
5996 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
5997 | Non-nil also enables highlighting of the region whenever the mark is active. |
5998 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5a39b770 RS |
5999 | all windows or just the selected window. |
6000 | ||
6001 | If the value is `lambda', that enables Transient Mark mode temporarily | |
6002 | until the next buffer modification. If a command sets the value to `only', | |
b3264fd2 RS |
6003 | that enables Transient Mark mode for the following command only. |
6004 | During that following command, the value of `transient-mark-mode' | |
6005 | is `identity'. If it is still `identity' at the end of that command, | |
6006 | it changes to nil. */); | |
c48f61ef RS |
6007 | Vtransient_mark_mode = Qnil; |
6008 | ||
7ee72033 MB |
6009 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6010 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6011 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6012 | text properties. If the value is a list, disregard `buffer-read-only' | |
6013 | and disregard a `read-only' text property if the property value | |
6014 | is a member of the list. */); | |
a96b68f1 RS |
6015 | Vinhibit_read_only = Qnil; |
6016 | ||
7ee72033 | 6017 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
cd8d5236 | 6018 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6019 | Values are interpreted as follows: |
6020 | ||
b8dc613f JB |
6021 | t use the cursor specified for the frame |
6022 | nil don't display a cursor | |
6023 | box display a filled box cursor | |
6024 | hollow display a hollow box cursor | |
6025 | bar display a vertical bar cursor with default width | |
6026 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6027 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6028 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6029 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 RS |
6030 | |
6031 | When the buffer is displayed in a nonselected window, | |
6032 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 6033 | |
a3bbced0 | 6034 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6035 | ¤t_buffer->extra_line_spacing, Qnil, |
6036 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
6037 | The space is measured in pixels, and put below lines on window systems. |
6038 | If value is a floating point number, it specifies the spacing relative | |
63af6055 | 6039 | to the default frame line height. nil means add no extra space. */); |
a3bbced0 | 6040 | |
0124c5bd | 6041 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6042 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
0124c5bd RS |
6043 | doc: /* *Cursor type to display in non-selected windows. |
6044 | t means to use hollow box cursor. See `cursor-type' for other values. */); | |
6045 | ||
7ee72033 | 6046 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
efc7e75f | 6047 | doc: /* List of functions called with no args to query before killing a buffer. */); |
dcdffbf6 RS |
6048 | Vkill_buffer_query_functions = Qnil; |
6049 | ||
43ed3b8d CY |
6050 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6051 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6052 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6053 | Vchange_major_mode_hook = Qnil; | |
6054 | Qchange_major_mode_hook = intern ("change-major-mode-hook"); | |
6055 | staticpro (&Qchange_major_mode_hook); | |
6056 | ||
0dc88e60 | 6057 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6058 | defsubr (&Sbuffer_list); |
6059 | defsubr (&Sget_buffer); | |
6060 | defsubr (&Sget_file_buffer); | |
6061 | defsubr (&Sget_buffer_create); | |
336cd056 | 6062 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6063 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6064 | defsubr (&Sbuffer_name); |
6065 | /*defsubr (&Sbuffer_number);*/ | |
6066 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6067 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6068 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6069 | defsubr (&Sbuffer_local_variables); |
6070 | defsubr (&Sbuffer_modified_p); | |
6071 | defsubr (&Sset_buffer_modified_p); | |
6072 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6073 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6074 | defsubr (&Srename_buffer); |
6075 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6076 | defsubr (&Sbuffer_enable_undo); |
6077 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6078 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6079 | defsubr (&Sswitch_to_buffer); |
6080 | defsubr (&Spop_to_buffer); | |
6081 | defsubr (&Scurrent_buffer); | |
6082 | defsubr (&Sset_buffer); | |
6083 | defsubr (&Sbarf_if_buffer_read_only); | |
6084 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
6085 | defsubr (&Serase_buffer); |
6086 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 6087 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6088 | |
52f8ec73 | 6089 | defsubr (&Soverlayp); |
2eec3b4e RS |
6090 | defsubr (&Smake_overlay); |
6091 | defsubr (&Sdelete_overlay); | |
6092 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6093 | defsubr (&Soverlay_start); |
6094 | defsubr (&Soverlay_end); | |
6095 | defsubr (&Soverlay_buffer); | |
6096 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6097 | defsubr (&Soverlays_at); |
74514898 | 6098 | defsubr (&Soverlays_in); |
2eec3b4e | 6099 | defsubr (&Snext_overlay_change); |
239c932b | 6100 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6101 | defsubr (&Soverlay_recenter); |
6102 | defsubr (&Soverlay_lists); | |
6103 | defsubr (&Soverlay_get); | |
6104 | defsubr (&Soverlay_put); | |
a8c21b48 | 6105 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6106 | } |
6107 | ||
dfcf069d | 6108 | void |
1ab256cb RM |
6109 | keys_of_buffer () |
6110 | { | |
6111 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6112 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6113 | |
6114 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6115 | initialized when that function gets called. */ | |
6116 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 6117 | } |
ab5796a9 MB |
6118 | |
6119 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6120 | (do not change this comment) */ |