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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, | |
76b6f707 | 4 | 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
8cabe764 | 5 | Free Software Foundation, Inc. |
1ab256cb RM |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
9ec0b715 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 10 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
1ab256cb RM |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 23 | |
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
d7306fe6 | 29 | #include <setjmp.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" | |
8f348ed5 | 45 | #include "character.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 | ||
6b61353c | 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 | ||
6b61353c KH |
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 | ||
13de9290 RS |
102 | /* Flags indicating which built-in buffer-local variables |
103 | are permanent locals. */ | |
7313acd0 | 104 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
105 | |
106 | /* Number of per-buffer variables used. */ | |
107 | ||
7313acd0 | 108 | int last_per_buffer_idx; |
13de9290 | 109 | |
3709505e SM |
110 | EXFUN (Fset_buffer, 1); |
111 | void set_buffer_internal P_ ((struct buffer *b)); | |
112 | void set_buffer_internal_1 P_ ((struct buffer *b)); | |
113 | static void call_overlay_mod_hooks P_ ((Lisp_Object list, Lisp_Object overlay, | |
114 | int after, Lisp_Object arg1, | |
115 | Lisp_Object arg2, Lisp_Object arg3)); | |
116 | static void swap_out_buffer_local_variables P_ ((struct buffer *b)); | |
117 | static void reset_buffer_local_variables P_ ((struct buffer *b, int permanent_too)); | |
1ab256cb RM |
118 | |
119 | /* Alist of all buffer names vs the buffers. */ | |
120 | /* This used to be a variable, but is no longer, | |
121 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
122 | Lisp_Object Vbuffer_alist; | |
123 | ||
124 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
125 | Lisp_Object Vbefore_change_functions; |
126 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 127 | |
c48f61ef RS |
128 | Lisp_Object Vtransient_mark_mode; |
129 | ||
a96b68f1 RS |
130 | /* t means ignore all read-only text properties. |
131 | A list means ignore such a property if its value is a member of the list. | |
132 | Any non-nil value means ignore buffer-read-only. */ | |
133 | Lisp_Object Vinhibit_read_only; | |
134 | ||
dcdffbf6 RS |
135 | /* List of functions to call that can query about killing a buffer. |
136 | If any of these functions returns nil, we don't kill it. */ | |
137 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 138 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 139 | |
43ed3b8d CY |
140 | /* Hook run before changing a major mode. */ |
141 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
142 | ||
dbc4e1c1 JB |
143 | /* List of functions to call before changing an unmodified buffer. */ |
144 | Lisp_Object Vfirst_change_hook; | |
22378665 | 145 | |
dbc4e1c1 | 146 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
147 | Lisp_Object Qbefore_change_functions; |
148 | Lisp_Object Qafter_change_functions; | |
48265e61 | 149 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 150 | |
7775635d KH |
151 | /* If nonzero, all modification hooks are suppressed. */ |
152 | int inhibit_modification_hooks; | |
153 | ||
1ab256cb | 154 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
2f7a359d | 155 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
156 | |
157 | Lisp_Object Qprotected_field; | |
158 | ||
159 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
160 | ||
161 | Lisp_Object Qkill_buffer_hook; | |
162 | ||
5fe0b67e RS |
163 | Lisp_Object Qget_file_buffer; |
164 | ||
52f8ec73 JB |
165 | Lisp_Object Qoverlayp; |
166 | ||
bbbe9545 | 167 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 168 | |
294d215f RS |
169 | Lisp_Object Qmodification_hooks; |
170 | Lisp_Object Qinsert_in_front_hooks; | |
171 | Lisp_Object Qinsert_behind_hooks; | |
172 | ||
b86af064 GM |
173 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
174 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 175 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 176 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
e1688f54 | 177 | static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); |
b86af064 | 178 | |
cab1603f | 179 | extern char * emacs_strerror P_ ((int)); |
b86af064 | 180 | |
1ab256cb RM |
181 | /* For debugging; temporary. See set_buffer_internal. */ |
182 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
183 | ||
01136e9b | 184 | void |
1ab256cb RM |
185 | nsberror (spec) |
186 | Lisp_Object spec; | |
187 | { | |
a7a60ce9 | 188 | if (STRINGP (spec)) |
d5db4077 | 189 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
190 | error ("Invalid buffer argument"); |
191 | } | |
192 | \f | |
0dc88e60 | 193 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
194 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
195 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
196 | (object) | |
0dc88e60 RS |
197 | Lisp_Object object; |
198 | { | |
199 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
200 | ? Qt : Qnil); | |
201 | } | |
202 | ||
08460cd4 | 203 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 204 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
205 | If the optional arg FRAME is a frame, we return the buffer list |
206 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
207 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 208 | (frame) |
08460cd4 | 209 | Lisp_Object frame; |
1ab256cb | 210 | { |
a18b8cb5 | 211 | Lisp_Object general; |
08460cd4 RS |
212 | general = Fmapcar (Qcdr, Vbuffer_alist); |
213 | ||
214 | if (FRAMEP (frame)) | |
215 | { | |
a18b8cb5 KL |
216 | Lisp_Object framelist, prevlist, tail; |
217 | Lisp_Object args[3]; | |
08460cd4 | 218 | |
b7826503 | 219 | CHECK_FRAME (frame); |
08460cd4 RS |
220 | |
221 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 222 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 223 | |
a18b8cb5 KL |
224 | /* Remove from GENERAL any buffer that duplicates one in |
225 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 226 | tail = framelist; |
a18b8cb5 | 227 | while (CONSP (tail)) |
08460cd4 | 228 | { |
7539e11f KR |
229 | general = Fdelq (XCAR (tail), general); |
230 | tail = XCDR (tail); | |
08460cd4 | 231 | } |
a18b8cb5 KL |
232 | tail = prevlist; |
233 | while (CONSP (tail)) | |
234 | { | |
235 | general = Fdelq (XCAR (tail), general); | |
236 | tail = XCDR (tail); | |
237 | } | |
238 | ||
239 | args[0] = framelist; | |
240 | args[1] = general; | |
241 | args[2] = prevlist; | |
242 | return Fnconc (3, args); | |
08460cd4 RS |
243 | } |
244 | ||
245 | return general; | |
1ab256cb RM |
246 | } |
247 | ||
04ae1b48 RS |
248 | /* Like Fassoc, but use Fstring_equal to compare |
249 | (which ignores text properties), | |
250 | and don't ever QUIT. */ | |
251 | ||
252 | static Lisp_Object | |
253 | assoc_ignore_text_properties (key, list) | |
254 | register Lisp_Object key; | |
255 | Lisp_Object list; | |
256 | { | |
257 | register Lisp_Object tail; | |
6d70a280 | 258 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
259 | { |
260 | register Lisp_Object elt, tem; | |
6d70a280 | 261 | elt = XCAR (tail); |
04ae1b48 RS |
262 | tem = Fstring_equal (Fcar (elt), key); |
263 | if (!NILP (tem)) | |
264 | return elt; | |
265 | } | |
266 | return Qnil; | |
267 | } | |
268 | ||
1ab256cb | 269 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
270 | doc: /* Return the buffer named BUFFER-OR-NAME. |
271 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
272 | is a string and there is no buffer with that name, return nil. If | |
273 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
274 | (buffer_or_name) | |
275 | register Lisp_Object buffer_or_name; | |
1ab256cb | 276 | { |
c8804c4f MR |
277 | if (BUFFERP (buffer_or_name)) |
278 | return buffer_or_name; | |
279 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 280 | |
c8804c4f | 281 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
282 | } |
283 | ||
284 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 285 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
286 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
287 | If there is no such live buffer, return nil. | |
7ee72033 MB |
288 | See also `find-buffer-visiting'. */) |
289 | (filename) | |
1ab256cb RM |
290 | register Lisp_Object filename; |
291 | { | |
292 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
293 | Lisp_Object handler; |
294 | ||
b7826503 | 295 | CHECK_STRING (filename); |
1ab256cb RM |
296 | filename = Fexpand_file_name (filename, Qnil); |
297 | ||
5fe0b67e RS |
298 | /* If the file name has special constructs in it, |
299 | call the corresponding file handler. */ | |
a617e913 | 300 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
301 | if (!NILP (handler)) |
302 | return call2 (handler, Qget_file_buffer, filename); | |
303 | ||
7539e11f | 304 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 305 | { |
7539e11f | 306 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
307 | if (!BUFFERP (buf)) continue; |
308 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 309 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 310 | if (!NILP (tem)) |
1ab256cb RM |
311 | return buf; |
312 | } | |
313 | return Qnil; | |
314 | } | |
315 | ||
52e01189 RS |
316 | Lisp_Object |
317 | get_truename_buffer (filename) | |
318 | register Lisp_Object filename; | |
319 | { | |
320 | register Lisp_Object tail, buf, tem; | |
321 | ||
7539e11f | 322 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 323 | { |
7539e11f | 324 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
325 | if (!BUFFERP (buf)) continue; |
326 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
327 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
328 | if (!NILP (tem)) | |
329 | return buf; | |
330 | } | |
331 | return Qnil; | |
332 | } | |
333 | ||
1ab256cb RM |
334 | /* Incremented for each buffer created, to assign the buffer number. */ |
335 | int buffer_count; | |
336 | ||
337 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
cd265ca6 MR |
338 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
339 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
340 | return that buffer. If no such buffer exists, create a new buffer with | |
341 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
342 | buffer does not keep undo information. | |
343 | ||
344 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
345 | even if it is dead. The return value is never nil. */) | |
346 | (buffer_or_name) | |
347 | register Lisp_Object buffer_or_name; | |
1ab256cb | 348 | { |
cd265ca6 | 349 | register Lisp_Object buffer, name; |
1ab256cb RM |
350 | register struct buffer *b; |
351 | ||
cd265ca6 MR |
352 | buffer = Fget_buffer (buffer_or_name); |
353 | if (!NILP (buffer)) | |
354 | return buffer; | |
1ab256cb | 355 | |
cd265ca6 | 356 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
357 | error ("Empty string for buffer name is not allowed"); |
358 | ||
cc648cef | 359 | b = allocate_buffer (); |
1ab256cb | 360 | |
336cd056 RS |
361 | /* An ordinary buffer uses its own struct buffer_text. */ |
362 | b->text = &b->own_text; | |
363 | b->base_buffer = 0; | |
364 | ||
1ab256cb | 365 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 366 | BLOCK_INPUT; |
3b06f880 KH |
367 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
368 | anchoring a search. */ | |
b86af064 | 369 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 370 | UNBLOCK_INPUT; |
1ab256cb | 371 | if (! BUF_BEG_ADDR (b)) |
81841847 | 372 | buffer_memory_full (); |
1ab256cb | 373 | |
6d70a280 SM |
374 | BUF_PT (b) = BEG; |
375 | BUF_GPT (b) = BEG; | |
376 | BUF_BEGV (b) = BEG; | |
377 | BUF_ZV (b) = BEG; | |
378 | BUF_Z (b) = BEG; | |
379 | BUF_PT_BYTE (b) = BEG_BYTE; | |
380 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
381 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
382 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
383 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 384 | BUF_MODIFF (b) = 1; |
3e145152 | 385 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 386 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
387 | BUF_SAVE_MODIFF (b) = 1; |
388 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
389 | BUF_UNCHANGED_MODIFIED (b) = 1; |
390 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
391 | BUF_END_UNCHANGED (b) = 0; | |
392 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 393 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 394 | |
28e969dd JB |
395 | b->newline_cache = 0; |
396 | b->width_run_cache = 0; | |
397 | b->width_table = Qnil; | |
b5a225b4 | 398 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 399 | |
1ab256cb RM |
400 | /* Put this on the chain of all buffers including killed ones. */ |
401 | b->next = all_buffers; | |
402 | all_buffers = b; | |
403 | ||
336cd056 RS |
404 | /* An ordinary buffer normally doesn't need markers |
405 | to handle BEGV and ZV. */ | |
406 | b->pt_marker = Qnil; | |
407 | b->begv_marker = Qnil; | |
408 | b->zv_marker = Qnil; | |
04ae1b48 | 409 | |
cd265ca6 | 410 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 411 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 412 | b->name = name; |
04ae1b48 | 413 | |
67ee9f6e | 414 | b->undo_list = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
415 | |
416 | reset_buffer (b); | |
13de9290 | 417 | reset_buffer_local_variables (b, 1); |
1ab256cb | 418 | |
1f57cb74 | 419 | b->mark = Fmake_marker (); |
65745fad | 420 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
421 | b->name = name; |
422 | ||
1ab256cb | 423 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
424 | XSETBUFFER (buffer, b); |
425 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 426 | |
2f064abf | 427 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
428 | can lead to infinite regress until you run out of stack. rms |
429 | says that's not worth protecting against. */ | |
48265e61 | 430 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
431 | /* buffer is on buffer-alist, so no gcpro. */ |
432 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 433 | |
cd265ca6 | 434 | return buffer; |
336cd056 RS |
435 | } |
436 | ||
7e9d5818 | 437 | |
04e4cb3a GM |
438 | /* Return a list of overlays which is a copy of the overlay list |
439 | LIST, but for buffer B. */ | |
440 | ||
2410d73a | 441 | static struct Lisp_Overlay * |
04e4cb3a GM |
442 | copy_overlays (b, list) |
443 | struct buffer *b; | |
2410d73a | 444 | struct Lisp_Overlay *list; |
04e4cb3a | 445 | { |
2410d73a SM |
446 | Lisp_Object buffer; |
447 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
448 | |
449 | XSETBUFFER (buffer, b); | |
450 | ||
2410d73a | 451 | for (; list; list = list->next) |
04e4cb3a GM |
452 | { |
453 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 454 | EMACS_INT charpos; |
04e4cb3a | 455 | |
2410d73a | 456 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
457 | charpos = marker_position (OVERLAY_START (old_overlay)); |
458 | start = Fmake_marker (); | |
db3a49a6 | 459 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
460 | XMARKER (start)->insertion_type |
461 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
462 | ||
463 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
464 | end = Fmake_marker (); | |
db3a49a6 | 465 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
466 | XMARKER (end)->insertion_type |
467 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
468 | ||
469 | overlay = allocate_misc (); | |
470 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
471 | OVERLAY_START (overlay) = start; | |
472 | OVERLAY_END (overlay) = end; | |
473 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 474 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 475 | |
2410d73a SM |
476 | if (tail) |
477 | tail = tail->next = XOVERLAY (overlay); | |
478 | else | |
479 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
480 | } |
481 | ||
2410d73a | 482 | return result; |
04e4cb3a | 483 | } |
177c0ea7 | 484 | |
04e4cb3a | 485 | |
7e9d5818 GM |
486 | /* Clone per-buffer values of buffer FROM. |
487 | ||
488 | Buffer TO gets the same per-buffer values as FROM, with the | |
489 | following exceptions: (1) TO's name is left untouched, (2) markers | |
490 | are copied and made to refer to TO, and (3) overlay lists are | |
491 | copied. */ | |
492 | ||
493 | static void | |
494 | clone_per_buffer_values (from, to) | |
495 | struct buffer *from, *to; | |
496 | { | |
54622f33 | 497 | Lisp_Object to_buffer; |
7e9d5818 GM |
498 | int offset; |
499 | ||
500 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 501 | |
3ee24aec SM |
502 | /* buffer-local Lisp variables start at `undo_list', |
503 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 504 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
505 | offset < sizeof *to; |
506 | offset += sizeof (Lisp_Object)) | |
507 | { | |
508 | Lisp_Object obj; | |
509 | ||
4b7cdc0e SM |
510 | /* Don't touch the `name' which should be unique for every buffer. */ |
511 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
512 | continue; | |
513 | ||
7e9d5818 GM |
514 | obj = PER_BUFFER_VALUE (from, offset); |
515 | if (MARKERP (obj)) | |
516 | { | |
517 | struct Lisp_Marker *m = XMARKER (obj); | |
518 | obj = Fmake_marker (); | |
519 | XMARKER (obj)->insertion_type = m->insertion_type; | |
520 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
521 | } | |
522 | ||
523 | PER_BUFFER_VALUE (to, offset) = obj; | |
524 | } | |
525 | ||
7e9d5818 | 526 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 527 | |
04e4cb3a GM |
528 | to->overlays_before = copy_overlays (to, from->overlays_before); |
529 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 530 | |
e1688f54 RS |
531 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
532 | and install that in TO. */ | |
533 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
534 | } |
535 | ||
7e9d5818 GM |
536 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
537 | 2, 3, | |
193c3837 | 538 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 539 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 540 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
541 | NAME should be a string which is not the name of an existing buffer. |
542 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
543 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
544 | CLONE nil means the indirect buffer's state is reset to default values. */) |
545 | (base_buffer, name, clone) | |
7e9d5818 | 546 | Lisp_Object base_buffer, name, clone; |
336cd056 | 547 | { |
6b61353c | 548 | Lisp_Object buf, tem; |
7e9d5818 | 549 | struct buffer *b; |
336cd056 | 550 | |
6b61353c | 551 | CHECK_STRING (name); |
336cd056 RS |
552 | buf = Fget_buffer (name); |
553 | if (!NILP (buf)) | |
d5db4077 | 554 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 555 | |
6b61353c | 556 | tem = base_buffer; |
336cd056 RS |
557 | base_buffer = Fget_buffer (base_buffer); |
558 | if (NILP (base_buffer)) | |
6b61353c KH |
559 | error ("No such buffer: `%s'", SDATA (tem)); |
560 | if (NILP (XBUFFER (base_buffer)->name)) | |
561 | error ("Base buffer has been killed"); | |
336cd056 | 562 | |
d5db4077 | 563 | if (SCHARS (name) == 0) |
336cd056 RS |
564 | error ("Empty string for buffer name is not allowed"); |
565 | ||
cc648cef | 566 | b = allocate_buffer (); |
336cd056 | 567 | |
67ee9f6e SM |
568 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
569 | ? XBUFFER (base_buffer)->base_buffer | |
570 | : XBUFFER (base_buffer)); | |
336cd056 RS |
571 | |
572 | /* Use the base buffer's text object. */ | |
573 | b->text = b->base_buffer->text; | |
574 | ||
575 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
576 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
577 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
578 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
579 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
580 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
581 | |
582 | b->newline_cache = 0; | |
583 | b->width_run_cache = 0; | |
584 | b->width_table = Qnil; | |
585 | ||
586 | /* Put this on the chain of all buffers including killed ones. */ | |
587 | b->next = all_buffers; | |
588 | all_buffers = b; | |
589 | ||
590 | name = Fcopy_sequence (name); | |
ab77f05c | 591 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
592 | b->name = name; |
593 | ||
594 | reset_buffer (b); | |
13de9290 | 595 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
596 | |
597 | /* Put this in the alist of all live buffers. */ | |
598 | XSETBUFFER (buf, b); | |
599 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
600 | ||
601 | b->mark = Fmake_marker (); | |
1ab256cb | 602 | b->name = name; |
336cd056 | 603 | |
abc9d959 RS |
604 | /* The multibyte status belongs to the base buffer. */ |
605 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
606 | ||
336cd056 RS |
607 | /* Make sure the base buffer has markers for its narrowing. */ |
608 | if (NILP (b->base_buffer->pt_marker)) | |
609 | { | |
610 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
611 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
612 | BUF_PT (b->base_buffer), | |
613 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
614 | } |
615 | if (NILP (b->base_buffer->begv_marker)) | |
616 | { | |
617 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
618 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
619 | BUF_BEGV (b->base_buffer), | |
620 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
621 | } |
622 | if (NILP (b->base_buffer->zv_marker)) | |
623 | { | |
624 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
625 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
626 | BUF_ZV (b->base_buffer), | |
627 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 628 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
629 | } |
630 | ||
7e9d5818 GM |
631 | if (NILP (clone)) |
632 | { | |
633 | /* Give the indirect buffer markers for its narrowing. */ | |
634 | b->pt_marker = Fmake_marker (); | |
635 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
636 | b->begv_marker = Fmake_marker (); | |
637 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
638 | b->zv_marker = Fmake_marker (); | |
639 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
640 | XMARKER (b->zv_marker)->insertion_type = 1; | |
641 | } | |
642 | else | |
7fa57e45 RS |
643 | { |
644 | struct buffer *old_b = current_buffer; | |
645 | ||
646 | clone_per_buffer_values (b->base_buffer, b); | |
647 | b->filename = Qnil; | |
648 | b->file_truename = Qnil; | |
649 | b->display_count = make_number (0); | |
650 | b->backed_up = Qnil; | |
651 | b->auto_save_file_name = Qnil; | |
652 | set_buffer_internal_1 (b); | |
653 | Fset (intern ("buffer-save-without-query"), Qnil); | |
654 | Fset (intern ("buffer-file-number"), Qnil); | |
655 | Fset (intern ("buffer-stale-function"), Qnil); | |
656 | set_buffer_internal_1 (old_b); | |
657 | } | |
336cd056 | 658 | |
a9ee7a59 | 659 | return buf; |
1ab256cb RM |
660 | } |
661 | ||
d4f5719a SM |
662 | void |
663 | delete_all_overlays (b) | |
664 | struct buffer *b; | |
665 | { | |
666 | Lisp_Object overlay; | |
667 | ||
668 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
669 | have to empty the list, otherwise we end up with overlays that | |
670 | think they belong to this buffer while the buffer doesn't know about | |
671 | them any more. */ | |
672 | while (b->overlays_before) | |
673 | { | |
674 | XSETMISC (overlay, b->overlays_before); | |
675 | Fdelete_overlay (overlay); | |
676 | } | |
677 | while (b->overlays_after) | |
678 | { | |
679 | XSETMISC (overlay, b->overlays_after); | |
680 | Fdelete_overlay (overlay); | |
681 | } | |
682 | eassert (b->overlays_before == NULL); | |
683 | eassert (b->overlays_after == NULL); | |
684 | } | |
685 | ||
bcd40520 | 686 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 687 | and local variables. |
d4f5719a SM |
688 | If called on an already-initialized buffer, the list of overlays |
689 | should be deleted before calling this function, otherwise we end up | |
690 | with overlays that claim to belong to the buffer but the buffer | |
691 | claims it doesn't belong to it. */ | |
1ab256cb RM |
692 | |
693 | void | |
694 | reset_buffer (b) | |
695 | register struct buffer *b; | |
696 | { | |
697 | b->filename = Qnil; | |
f6ed2e84 | 698 | b->file_truename = Qnil; |
1ab256cb RM |
699 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
700 | b->modtime = 0; | |
8d7a4592 | 701 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 702 | b->last_window_start = 1; |
8b264726 | 703 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
704 | b->clip_changed = 0; |
705 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
706 | b->backed_up = Qnil; |
707 | b->auto_save_modified = 0; | |
84f6bcba | 708 | b->auto_save_failure_time = -1; |
1ab256cb RM |
709 | b->auto_save_file_name = Qnil; |
710 | b->read_only = Qnil; | |
2410d73a SM |
711 | b->overlays_before = NULL; |
712 | b->overlays_after = NULL; | |
c2d5b10f | 713 | b->overlay_center = BEG; |
dfda7a7f | 714 | b->mark_active = Qnil; |
943e065b | 715 | b->point_before_scroll = Qnil; |
be9aafdd | 716 | b->file_format = Qnil; |
71ed49fa | 717 | b->auto_save_file_format = Qt; |
0dc6f165 | 718 | b->last_selected_window = Qnil; |
7962a441 | 719 | XSETINT (b->display_count, 0); |
3fd364db | 720 | b->display_time = Qnil; |
1bf08baf | 721 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 722 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 723 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
724 | |
725 | b->display_error_modiff = 0; | |
1ab256cb RM |
726 | } |
727 | ||
bcd40520 RS |
728 | /* Reset buffer B's local variables info. |
729 | Don't use this on a buffer that has already been in use; | |
730 | it does not treat permanent locals consistently. | |
13de9290 RS |
731 | Instead, use Fkill_all_local_variables. |
732 | ||
3709505e | 733 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
734 | buffer-local variables. If PERMANENT_TOO is 0, |
735 | we preserve those. */ | |
bcd40520 | 736 | |
13de9290 RS |
737 | static void |
738 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 739 | register struct buffer *b; |
13de9290 | 740 | int permanent_too; |
1ab256cb RM |
741 | { |
742 | register int offset; | |
7c02e886 | 743 | int i; |
1ab256cb RM |
744 | |
745 | /* Reset the major mode to Fundamental, together with all the | |
746 | things that depend on the major mode. | |
747 | default-major-mode is handled at a higher level. | |
748 | We ignore it here. */ | |
749 | b->major_mode = Qfundamental_mode; | |
750 | b->keymap = Qnil; | |
1ab256cb RM |
751 | b->mode_name = QSFundamental; |
752 | b->minor_modes = Qnil; | |
3446af9c RS |
753 | |
754 | /* If the standard case table has been altered and invalidated, | |
755 | fix up its insides first. */ | |
756 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
757 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
758 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
759 | Fset_standard_case_table (Vascii_downcase_table); | |
760 | ||
1ab256cb | 761 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
762 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
763 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
764 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 765 | b->invisibility_spec = Qt; |
2e716096 RS |
766 | #ifndef DOS_NT |
767 | b->buffer_file_type = Qnil; | |
768 | #endif | |
3cb719bd | 769 | |
13de9290 | 770 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e SM |
771 | if (permanent_too) |
772 | b->local_var_alist = Qnil; | |
773 | else | |
774 | { | |
2f7a359d | 775 | Lisp_Object tmp, prop, last = Qnil; |
3709505e SM |
776 | for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp)) |
777 | if (CONSP (XCAR (tmp)) | |
778 | && SYMBOLP (XCAR (XCAR (tmp))) | |
2f7a359d RS |
779 | && !NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
780 | { | |
781 | /* If permanent-local, keep it. */ | |
782 | last = tmp; | |
783 | if (EQ (prop, Qpermanent_local_hook)) | |
784 | { | |
785 | /* This is a partially permanent hook variable. | |
786 | Preserve only the elements that want to be preserved. */ | |
787 | Lisp_Object list, newlist; | |
788 | list = XCDR (XCAR (tmp)); | |
789 | if (!CONSP (list)) | |
790 | newlist = list; | |
791 | else | |
792 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
793 | { | |
794 | Lisp_Object elt = XCAR (list); | |
795 | /* Preserve element ELT if it's t, | |
796 | if it is a function with a `permanent-local-hook' property, | |
797 | or if it's not a symbol. */ | |
798 | if (! SYMBOLP (elt) | |
799 | || EQ (elt, Qt) | |
800 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
801 | newlist = Fcons (elt, newlist); | |
802 | } | |
803 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
804 | } | |
805 | } | |
806 | /* Delete this local variable. */ | |
3709505e SM |
807 | else if (NILP (last)) |
808 | b->local_var_alist = XCDR (tmp); | |
809 | else | |
810 | XSETCDR (last, XCDR (tmp)); | |
811 | } | |
812 | ||
7313acd0 | 813 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 814 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 815 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
816 | |
817 | /* For each slot that has a default value, | |
818 | copy that into the slot. */ | |
819 | ||
3ee24aec SM |
820 | /* buffer-local Lisp variables start at `undo_list', |
821 | tho only the ones from `name' on are GC'd normally. */ | |
822 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
823 | offset < sizeof *b; |
824 | offset += sizeof (Lisp_Object)) | |
aab80822 | 825 | { |
7313acd0 | 826 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
827 | if ((idx > 0 |
828 | && (permanent_too | |
829 | || buffer_permanent_local_flags[idx] == 0)) | |
830 | /* Is -2 used anywhere? */ | |
831 | || idx == -2) | |
7313acd0 | 832 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 833 | } |
1ab256cb RM |
834 | } |
835 | ||
01050cb5 RM |
836 | /* We split this away from generate-new-buffer, because rename-buffer |
837 | and set-visited-file-name ought to be able to use this to really | |
838 | rename the buffer properly. */ | |
839 | ||
840 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 841 | 1, 2, 0, |
7ee72033 | 842 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
843 | If there is no live buffer named NAME, then return NAME. |
844 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 845 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
846 | Optional second argument IGNORE specifies a name that is okay to use (if |
847 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
7ee72033 | 848 | (name, ignore) |
c273e647 | 849 | register Lisp_Object name, ignore; |
1ab256cb RM |
850 | { |
851 | register Lisp_Object gentemp, tem; | |
852 | int count; | |
853 | char number[10]; | |
854 | ||
b7826503 | 855 | CHECK_STRING (name); |
1ab256cb | 856 | |
6b61353c KH |
857 | tem = Fstring_equal (name, ignore); |
858 | if (!NILP (tem)) | |
859 | return name; | |
1ab256cb | 860 | tem = Fget_buffer (name); |
265a9e55 | 861 | if (NILP (tem)) |
01050cb5 | 862 | return name; |
1ab256cb RM |
863 | |
864 | count = 1; | |
865 | while (1) | |
866 | { | |
867 | sprintf (number, "<%d>", ++count); | |
868 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 869 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
870 | if (!NILP (tem)) |
871 | return gentemp; | |
1ab256cb | 872 | tem = Fget_buffer (gentemp); |
265a9e55 | 873 | if (NILP (tem)) |
01050cb5 | 874 | return gentemp; |
1ab256cb RM |
875 | } |
876 | } | |
877 | ||
878 | \f | |
879 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 | 880 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
881 | BUFFER defaults to the current buffer. |
882 | Return nil if BUFFER has been killed. */) | |
7ee72033 | 883 | (buffer) |
1ab256cb RM |
884 | register Lisp_Object buffer; |
885 | { | |
265a9e55 | 886 | if (NILP (buffer)) |
1ab256cb | 887 | return current_buffer->name; |
b7826503 | 888 | CHECK_BUFFER (buffer); |
1ab256cb RM |
889 | return XBUFFER (buffer)->name; |
890 | } | |
891 | ||
892 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
893 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
894 | No argument or nil as argument means use the current buffer. */) | |
895 | (buffer) | |
1ab256cb RM |
896 | register Lisp_Object buffer; |
897 | { | |
265a9e55 | 898 | if (NILP (buffer)) |
1ab256cb | 899 | return current_buffer->filename; |
b7826503 | 900 | CHECK_BUFFER (buffer); |
1ab256cb RM |
901 | return XBUFFER (buffer)->filename; |
902 | } | |
903 | ||
336cd056 RS |
904 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
905 | 0, 1, 0, | |
7ee72033 | 906 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
907 | If BUFFER is not indirect, return nil. |
908 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 909 | (buffer) |
336cd056 RS |
910 | register Lisp_Object buffer; |
911 | { | |
912 | struct buffer *base; | |
913 | Lisp_Object base_buffer; | |
914 | ||
915 | if (NILP (buffer)) | |
916 | base = current_buffer->base_buffer; | |
917 | else | |
918 | { | |
b7826503 | 919 | CHECK_BUFFER (buffer); |
336cd056 RS |
920 | base = XBUFFER (buffer)->base_buffer; |
921 | } | |
922 | ||
923 | if (! base) | |
924 | return Qnil; | |
925 | XSETBUFFER (base_buffer, base); | |
926 | return base_buffer; | |
927 | } | |
928 | ||
79aa712d | 929 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 930 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
931 | doc: /* Return the value of VARIABLE in BUFFER. |
932 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
933 | is the default binding of the variable. */) |
934 | (variable, buffer) | |
935 | register Lisp_Object variable; | |
79aa712d RS |
936 | register Lisp_Object buffer; |
937 | { | |
938 | register struct buffer *buf; | |
939 | register Lisp_Object result; | |
ad97b375 | 940 | struct Lisp_Symbol *sym; |
79aa712d | 941 | |
5e2ad10b | 942 | CHECK_SYMBOL (variable); |
ae69175b | 943 | CHECK_BUFFER (buffer); |
79aa712d RS |
944 | buf = XBUFFER (buffer); |
945 | ||
ad97b375 SM |
946 | sym = indirect_variable (XSYMBOL (variable)); |
947 | XSETSYMBOL (variable, sym); | |
0e4d0c9a | 948 | |
79aa712d | 949 | /* Look in local_var_list */ |
5e2ad10b | 950 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 951 | if (NILP (result)) |
79aa712d RS |
952 | { |
953 | int offset, idx; | |
954 | int found = 0; | |
955 | ||
956 | /* Look in special slots */ | |
3ee24aec SM |
957 | /* buffer-local Lisp variables start at `undo_list', |
958 | tho only the ones from `name' on are GC'd normally. */ | |
959 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
79aa712d RS |
960 | offset < sizeof (struct buffer); |
961 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
962 | offset += (sizeof (EMACS_INT))) | |
963 | { | |
964 | idx = PER_BUFFER_IDX (offset); | |
965 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 966 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 967 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
968 | { |
969 | result = PER_BUFFER_VALUE (buf, offset); | |
970 | found = 1; | |
971 | break; | |
972 | } | |
973 | } | |
974 | ||
975 | if (!found) | |
5e2ad10b | 976 | result = Fdefault_value (variable); |
79aa712d RS |
977 | } |
978 | else | |
f0bac7de RS |
979 | { |
980 | Lisp_Object valcontents; | |
981 | Lisp_Object current_alist_element; | |
982 | ||
983 | /* What binding is loaded right now? */ | |
ad97b375 | 984 | valcontents = sym->value; |
f0bac7de RS |
985 | current_alist_element |
986 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
987 | ||
988 | /* The value of the currently loaded binding is not | |
989 | stored in it, but rather in the realvalue slot. | |
990 | Store that value into the binding it belongs to | |
991 | in case that is the one we are about to use. */ | |
992 | ||
993 | Fsetcdr (current_alist_element, | |
994 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
995 | ||
996 | /* Now get the (perhaps updated) value out of the binding. */ | |
997 | result = XCDR (result); | |
998 | } | |
79aa712d | 999 | |
4c4dc0b0 KS |
1000 | if (!EQ (result, Qunbound)) |
1001 | return result; | |
79aa712d | 1002 | |
4c4dc0b0 | 1003 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
1004 | } |
1005 | ||
e1688f54 | 1006 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1007 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
1008 | in special slots in the buffer object. */ |
1009 | ||
1010 | static Lisp_Object | |
1011 | buffer_lisp_local_variables (buf) | |
1012 | struct buffer *buf; | |
1013 | { | |
1014 | Lisp_Object result = Qnil; | |
1015 | register Lisp_Object tail; | |
1016 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
1017 | { | |
1018 | Lisp_Object val, elt; | |
1019 | ||
1020 | elt = XCAR (tail); | |
1021 | ||
1022 | /* Reference each variable in the alist in buf. | |
1023 | If inquiring about the current buffer, this gets the current values, | |
1024 | so store them into the alist so the alist is up to date. | |
1025 | If inquiring about some other buffer, this swaps out any values | |
1026 | for that buffer, making the alist up to date automatically. */ | |
1027 | val = find_symbol_value (XCAR (elt)); | |
1028 | /* Use the current buffer value only if buf is the current buffer. */ | |
1029 | if (buf != current_buffer) | |
1030 | val = XCDR (elt); | |
1031 | ||
1032 | /* If symbol is unbound, put just the symbol in the list. */ | |
1033 | if (EQ (val, Qunbound)) | |
1034 | result = Fcons (XCAR (elt), result); | |
1035 | /* Otherwise, put (symbol . value) in the list. */ | |
1036 | else | |
1037 | result = Fcons (Fcons (XCAR (elt), val), result); | |
1038 | } | |
1039 | ||
1040 | return result; | |
1041 | } | |
1042 | ||
1ab256cb | 1043 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1044 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1045 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1046 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1047 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1048 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
1049 | No argument or nil as argument means use current buffer as BUFFER. */) |
1050 | (buffer) | |
1ab256cb RM |
1051 | register Lisp_Object buffer; |
1052 | { | |
1053 | register struct buffer *buf; | |
553defa4 | 1054 | register Lisp_Object result; |
1ab256cb | 1055 | |
265a9e55 | 1056 | if (NILP (buffer)) |
1ab256cb RM |
1057 | buf = current_buffer; |
1058 | else | |
1059 | { | |
b7826503 | 1060 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1061 | buf = XBUFFER (buffer); |
1062 | } | |
1063 | ||
e1688f54 | 1064 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1065 | |
1ab256cb RM |
1066 | /* Add on all the variables stored in special slots. */ |
1067 | { | |
7c02e886 | 1068 | int offset, idx; |
1ab256cb | 1069 | |
3ee24aec SM |
1070 | /* buffer-local Lisp variables start at `undo_list', |
1071 | tho only the ones from `name' on are GC'd normally. */ | |
1072 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1073 | offset < sizeof (struct buffer); |
7c02e886 GM |
1074 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1075 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1076 | { |
7313acd0 GM |
1077 | idx = PER_BUFFER_IDX (offset); |
1078 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1079 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1080 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1081 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1082 | result); |
1ab256cb RM |
1083 | } |
1084 | } | |
553defa4 RS |
1085 | |
1086 | return result; | |
1ab256cb | 1087 | } |
1ab256cb RM |
1088 | \f |
1089 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1090 | 0, 1, 0, |
7ee72033 MB |
1091 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1092 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1093 | (buffer) | |
1ab256cb RM |
1094 | register Lisp_Object buffer; |
1095 | { | |
1096 | register struct buffer *buf; | |
265a9e55 | 1097 | if (NILP (buffer)) |
1ab256cb RM |
1098 | buf = current_buffer; |
1099 | else | |
1100 | { | |
b7826503 | 1101 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1102 | buf = XBUFFER (buffer); |
1103 | } | |
1104 | ||
336cd056 | 1105 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1106 | } |
1107 | ||
1108 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1109 | 1, 1, 0, |
7ee72033 MB |
1110 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1111 | A non-nil FLAG means mark the buffer modified. */) | |
1112 | (flag) | |
1ab256cb RM |
1113 | register Lisp_Object flag; |
1114 | { | |
1115 | register int already; | |
1116 | register Lisp_Object fn; | |
8ec01c70 | 1117 | Lisp_Object buffer, window; |
1ab256cb RM |
1118 | |
1119 | #ifdef CLASH_DETECTION | |
1120 | /* If buffer becoming modified, lock the file. | |
1121 | If buffer becoming unmodified, unlock the file. */ | |
1122 | ||
60f4dd23 | 1123 | fn = current_buffer->file_truename; |
90d456d2 KH |
1124 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1125 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1126 | { |
336cd056 | 1127 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1128 | if (!already && !NILP (flag)) |
1ab256cb | 1129 | lock_file (fn); |
265a9e55 | 1130 | else if (already && NILP (flag)) |
1ab256cb RM |
1131 | unlock_file (fn); |
1132 | } | |
1133 | #endif /* CLASH_DETECTION */ | |
1134 | ||
336cd056 | 1135 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1136 | |
8ec01c70 GM |
1137 | /* Set update_mode_lines only if buffer is displayed in some window. |
1138 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1139 | state by recording/restoring the state around blocks of code. | |
1140 | Setting update_mode_lines makes redisplay consider all windows | |
1141 | (on all frames). Stealth fontification of buffers not displayed | |
1142 | would incur additional redisplay costs if we'd set | |
1143 | update_modes_lines unconditionally. | |
1144 | ||
1145 | Ideally, I think there should be another mechanism for fontifying | |
1146 | buffers without "modifying" buffers, or redisplay should be | |
1147 | smarter about updating the `*' in mode lines. --gerd */ | |
1148 | XSETBUFFER (buffer, current_buffer); | |
1149 | window = Fget_buffer_window (buffer, Qt); | |
1150 | if (WINDOWP (window)) | |
d57b83b3 GM |
1151 | { |
1152 | ++update_mode_lines; | |
1153 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1154 | } | |
177c0ea7 | 1155 | |
1ab256cb RM |
1156 | return flag; |
1157 | } | |
1158 | ||
a8c21b48 GM |
1159 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1160 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1161 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1162 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1163 | state of the current buffer. Use with care. */) |
1164 | (flag) | |
a8c21b48 GM |
1165 | Lisp_Object flag; |
1166 | { | |
1167 | #ifdef CLASH_DETECTION | |
1168 | Lisp_Object fn; | |
177c0ea7 | 1169 | |
a8c21b48 GM |
1170 | /* If buffer becoming modified, lock the file. |
1171 | If buffer becoming unmodified, unlock the file. */ | |
1172 | ||
1173 | fn = current_buffer->file_truename; | |
1174 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1175 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1176 | { | |
1177 | int already = SAVE_MODIFF < MODIFF; | |
1178 | if (!already && !NILP (flag)) | |
1179 | lock_file (fn); | |
1180 | else if (already && NILP (flag)) | |
1181 | unlock_file (fn); | |
1182 | } | |
1183 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1184 | |
a8c21b48 GM |
1185 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1186 | return flag; | |
1187 | } | |
1188 | ||
1ab256cb | 1189 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1190 | 0, 1, 0, |
7ee72033 | 1191 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1192 | Each buffer has a tick counter which is incremented each time the |
1193 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1194 | No argument or nil as argument means use current buffer as BUFFER. */) |
1195 | (buffer) | |
1ab256cb RM |
1196 | register Lisp_Object buffer; |
1197 | { | |
1198 | register struct buffer *buf; | |
265a9e55 | 1199 | if (NILP (buffer)) |
1ab256cb RM |
1200 | buf = current_buffer; |
1201 | else | |
1202 | { | |
b7826503 | 1203 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1204 | buf = XBUFFER (buffer); |
1205 | } | |
1206 | ||
1207 | return make_number (BUF_MODIFF (buf)); | |
1208 | } | |
3e145152 CY |
1209 | |
1210 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1211 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1212 | doc: /* Return BUFFER's character-change tick counter. | |
1213 | Each buffer has a character-change tick counter, which is set to the | |
1214 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1215 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1216 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1217 | you can tell whether a character change occurred in that buffer in |
1218 | between these calls. No argument or nil as argument means use current | |
1219 | buffer as BUFFER. */) | |
1220 | (buffer) | |
1221 | register Lisp_Object buffer; | |
1222 | { | |
1223 | register struct buffer *buf; | |
1224 | if (NILP (buffer)) | |
1225 | buf = current_buffer; | |
1226 | else | |
1227 | { | |
1228 | CHECK_BUFFER (buffer); | |
1229 | buf = XBUFFER (buffer); | |
1230 | } | |
1231 | ||
1232 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1233 | } | |
1ab256cb | 1234 | \f |
01050cb5 | 1235 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1236 | "(list (read-string \"Rename buffer (to new name): \" \ |
1237 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1238 | current-prefix-arg)", | |
7ee72033 | 1239 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1240 | If second arg UNIQUE is nil or omitted, it is an error if a |
1241 | buffer named NEWNAME already exists. | |
1242 | If UNIQUE is non-nil, come up with a new name using | |
1243 | `generate-new-buffer-name'. | |
1244 | Interactively, you can set UNIQUE with a prefix argument. | |
1245 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1246 | This does not change the name of the visited file (if any). */) |
1247 | (newname, unique) | |
489c043a | 1248 | register Lisp_Object newname, unique; |
1ab256cb RM |
1249 | { |
1250 | register Lisp_Object tem, buf; | |
1251 | ||
b7826503 | 1252 | CHECK_STRING (newname); |
d59698c4 | 1253 | |
d5db4077 | 1254 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1255 | error ("Empty string is invalid as a buffer name"); |
1256 | ||
489c043a | 1257 | tem = Fget_buffer (newname); |
265a9e55 | 1258 | if (!NILP (tem)) |
01050cb5 | 1259 | { |
8801a864 KR |
1260 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1261 | rename the buffer automatically so you can create another | |
1262 | with the original name. It makes UNIQUE equivalent to | |
1263 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1264 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1265 | return current_buffer->name; | |
3bd779aa | 1266 | if (!NILP (unique)) |
489c043a | 1267 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1268 | else |
d5db4077 | 1269 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1270 | } |
1ab256cb | 1271 | |
489c043a | 1272 | current_buffer->name = newname; |
76f590d7 JB |
1273 | |
1274 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1275 | any windows displaying current_buffer will stay unchanged. */ | |
1276 | update_mode_lines++; | |
1277 | ||
67180c6a | 1278 | XSETBUFFER (buf, current_buffer); |
489c043a | 1279 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1280 | if (NILP (current_buffer->filename) |
1281 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1282 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1283 | /* Refetch since that last call may have done GC. */ |
1284 | return current_buffer->name; | |
1ab256cb RM |
1285 | } |
1286 | ||
773fbdb9 | 1287 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1288 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1289 | Buffers not visible in windows are preferred to visible buffers, |
1290 | unless optional second argument VISIBLE-OK is non-nil. | |
1291 | If the optional third argument FRAME is non-nil, use that frame's | |
1292 | buffer list instead of the selected frame's buffer list. | |
1293 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1294 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1295 | (buffer, visible_ok, frame) | |
773fbdb9 | 1296 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1297 | { |
89132f25 | 1298 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1299 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1300 | notsogood = Qnil; |
1301 | ||
773fbdb9 | 1302 | if (NILP (frame)) |
9ba9623d | 1303 | frame = selected_frame; |
773fbdb9 | 1304 | |
7962a441 | 1305 | tail = Vbuffer_alist; |
773fbdb9 | 1306 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1307 | |
1308 | /* Consider buffers that have been seen in the selected frame | |
1309 | before other buffers. */ | |
177c0ea7 | 1310 | |
773fbdb9 | 1311 | tem = frame_buffer_list (frame); |
7962a441 RS |
1312 | add_ons = Qnil; |
1313 | while (CONSP (tem)) | |
1314 | { | |
7539e11f KR |
1315 | if (BUFFERP (XCAR (tem))) |
1316 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1317 | tem = XCDR (tem); | |
7962a441 RS |
1318 | } |
1319 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1320 | ||
6d70a280 | 1321 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1322 | { |
6d70a280 | 1323 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1324 | if (EQ (buf, buffer)) |
1325 | continue; | |
6b61353c KH |
1326 | if (NILP (buf)) |
1327 | continue; | |
1328 | if (NILP (XBUFFER (buf)->name)) | |
1329 | continue; | |
10ceceb8 | 1330 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1331 | continue; |
04ae1b48 RS |
1332 | /* If the selected frame has a buffer_predicate, |
1333 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1334 | if (!NILP (pred)) |
04ae1b48 | 1335 | { |
7962a441 | 1336 | tem = call1 (pred, buf); |
04ae1b48 RS |
1337 | if (NILP (tem)) |
1338 | continue; | |
1339 | } | |
04ae1b48 | 1340 | |
a0ebb746 | 1341 | if (NILP (visible_ok)) |
66ffe51c | 1342 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1343 | else |
1344 | tem = Qnil; | |
265a9e55 | 1345 | if (NILP (tem)) |
1ab256cb | 1346 | return buf; |
265a9e55 | 1347 | if (NILP (notsogood)) |
1ab256cb RM |
1348 | notsogood = buf; |
1349 | } | |
265a9e55 | 1350 | if (!NILP (notsogood)) |
1ab256cb | 1351 | return notsogood; |
dba1a30a GM |
1352 | buf = Fget_buffer (build_string ("*scratch*")); |
1353 | if (NILP (buf)) | |
1354 | { | |
1355 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1356 | Fset_buffer_major_mode (buf); | |
1357 | } | |
89132f25 | 1358 | return buf; |
1ab256cb RM |
1359 | } |
1360 | \f | |
1ab256cb RM |
1361 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1362 | 0, 1, "", | |
7ee72033 MB |
1363 | doc: /* Start keeping undo information for buffer BUFFER. |
1364 | No argument or nil as argument means do this for the current buffer. */) | |
1365 | (buffer) | |
ffd56f97 | 1366 | register Lisp_Object buffer; |
1ab256cb | 1367 | { |
ffd56f97 | 1368 | Lisp_Object real_buffer; |
1ab256cb | 1369 | |
ffd56f97 | 1370 | if (NILP (buffer)) |
67180c6a | 1371 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1372 | else |
1373 | { | |
ffd56f97 JB |
1374 | real_buffer = Fget_buffer (buffer); |
1375 | if (NILP (real_buffer)) | |
1376 | nsberror (buffer); | |
1ab256cb RM |
1377 | } |
1378 | ||
ffd56f97 JB |
1379 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1380 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1381 | |
1382 | return Qnil; | |
1383 | } | |
1384 | ||
1385 | /* | |
1386 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1387 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1388 | The buffer being killed will be current while the hook is running.\n\ | |
1389 | See `kill-buffer'." | |
1390 | */ | |
c8804c4f MR |
1391 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
1392 | doc: /* Kill buffer BUFFER-OR-NAME. | |
1393 | The argument may be a buffer or the name of an existing buffer. | |
1394 | Argument nil or omitted means kill the current buffer. Return t if the | |
1395 | buffer is actually killed, nil otherwise. | |
1396 | ||
1397 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1398 | windows currently displaying the buffer to be killed. The functions in | |
1399 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1400 | the current buffer. If any of them returns nil, the buffer is not | |
1401 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1402 | actually killed. The buffer being killed will be current while the hook | |
1403 | is running. | |
018ba359 PJ |
1404 | |
1405 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1406 | with SIGHUP. */) |
c8804c4f MR |
1407 | (buffer_or_name) |
1408 | Lisp_Object buffer_or_name; | |
1ab256cb | 1409 | { |
c8804c4f | 1410 | Lisp_Object buffer; |
1ab256cb RM |
1411 | register struct buffer *b; |
1412 | register Lisp_Object tem; | |
1413 | register struct Lisp_Marker *m; | |
6af718a4 | 1414 | struct gcpro gcpro1; |
1ab256cb | 1415 | |
c8804c4f MR |
1416 | if (NILP (buffer_or_name)) |
1417 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1418 | else |
c8804c4f MR |
1419 | buffer = Fget_buffer (buffer_or_name); |
1420 | if (NILP (buffer)) | |
1421 | nsberror (buffer_or_name); | |
1ab256cb | 1422 | |
c8804c4f | 1423 | b = XBUFFER (buffer); |
1ab256cb | 1424 | |
4a4a9db5 KH |
1425 | /* Avoid trouble for buffer already dead. */ |
1426 | if (NILP (b->name)) | |
1427 | return Qnil; | |
1428 | ||
1ab256cb | 1429 | /* Query if the buffer is still modified. */ |
265a9e55 | 1430 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1431 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1432 | { |
c8804c4f | 1433 | GCPRO1 (buffer); |
5c4930b0 RS |
1434 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1435 | b->name, make_number (0))); | |
1ab256cb | 1436 | UNGCPRO; |
265a9e55 | 1437 | if (NILP (tem)) |
1ab256cb RM |
1438 | return Qnil; |
1439 | } | |
1440 | ||
dcdffbf6 | 1441 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1442 | { |
aed13378 | 1443 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1444 | Lisp_Object arglist[1]; |
1ab256cb RM |
1445 | |
1446 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1447 | set_buffer_internal (b); | |
dcdffbf6 RS |
1448 | |
1449 | /* First run the query functions; if any query is answered no, | |
1450 | don't kill the buffer. */ | |
5b20caf0 | 1451 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1452 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1453 | if (NILP (tem)) | |
5b20caf0 | 1454 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1455 | |
1456 | /* Then run the hooks. */ | |
f1597a3a | 1457 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1458 | unbind_to (count, Qnil); |
1459 | } | |
1460 | ||
1461 | /* We have no more questions to ask. Verify that it is valid | |
1462 | to kill the buffer. This must be done after the questions | |
1463 | since anything can happen within do_yes_or_no_p. */ | |
1464 | ||
1465 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1466 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1467 | return Qnil; |
1468 | ||
265a9e55 | 1469 | if (NILP (b->name)) |
1ab256cb RM |
1470 | return Qnil; |
1471 | ||
336cd056 RS |
1472 | /* When we kill a base buffer, kill all its indirect buffers. |
1473 | We do it at this stage so nothing terrible happens if they | |
1474 | ask questions or their hooks get errors. */ | |
1475 | if (! b->base_buffer) | |
1476 | { | |
1477 | struct buffer *other; | |
1478 | ||
c8804c4f | 1479 | GCPRO1 (buffer); |
336cd056 RS |
1480 | |
1481 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1482 | /* all_buffers contains dead buffers too; |
1483 | don't re-kill them. */ | |
1484 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 | 1485 | { |
c8804c4f MR |
1486 | Lisp_Object buffer; |
1487 | XSETBUFFER (buffer, other); | |
1488 | Fkill_buffer (buffer); | |
336cd056 RS |
1489 | } |
1490 | ||
1491 | UNGCPRO; | |
1492 | } | |
177c0ea7 | 1493 | |
1ab256cb RM |
1494 | /* Make this buffer not be current. |
1495 | In the process, notice if this is the sole visible buffer | |
1496 | and give up if so. */ | |
1497 | if (b == current_buffer) | |
1498 | { | |
c8804c4f | 1499 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1500 | Fset_buffer (tem); |
1501 | if (b == current_buffer) | |
1502 | return Qnil; | |
1503 | } | |
1504 | ||
77270fac GM |
1505 | /* Notice if the buffer to kill is the sole visible buffer |
1506 | when we're currently in the mini-buffer, and give up if so. */ | |
1507 | XSETBUFFER (tem, current_buffer); | |
1508 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1509 | { | |
c8804c4f MR |
1510 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1511 | if (EQ (buffer, tem)) | |
77270fac GM |
1512 | return Qnil; |
1513 | } | |
1514 | ||
1ab256cb RM |
1515 | /* Now there is no question: we can kill the buffer. */ |
1516 | ||
1517 | #ifdef CLASH_DETECTION | |
1518 | /* Unlock this buffer's file, if it is locked. */ | |
1519 | unlock_buffer (b); | |
1520 | #endif /* CLASH_DETECTION */ | |
1521 | ||
c8804c4f MR |
1522 | GCPRO1 (buffer); |
1523 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1524 | UNGCPRO; |
1525 | ||
1526 | /* Killing buffer processes may run sentinels which may | |
1527 | have called kill-buffer. */ | |
1528 | ||
1529 | if (NILP (b->name)) | |
1530 | return Qnil; | |
1531 | ||
b93fb365 | 1532 | clear_charpos_cache (b); |
1ab256cb RM |
1533 | |
1534 | tem = Vinhibit_quit; | |
1535 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1536 | replace_buffer_in_all_windows (buffer); |
1537 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1538 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1539 | Vinhibit_quit = tem; |
1540 | ||
9cf712eb RS |
1541 | /* Delete any auto-save file, if we saved it in this session. |
1542 | But not if the buffer is modified. */ | |
a7a60ce9 | 1543 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1544 | && b->auto_save_modified != 0 |
9cf712eb | 1545 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
6b61353c KH |
1546 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1547 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1548 | { |
1549 | Lisp_Object tem; | |
1550 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1551 | if (! NILP (tem)) |
cbb6a418 | 1552 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1553 | } |
1554 | ||
4a4a9db5 KH |
1555 | if (b->base_buffer) |
1556 | { | |
1557 | /* Unchain all markers that belong to this indirect buffer. | |
1558 | Don't unchain the markers that belong to the base buffer | |
1559 | or its other indirect buffers. */ | |
65745fad | 1560 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1561 | { |
65745fad | 1562 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1563 | if (m->buffer == b) |
65745fad SM |
1564 | unchain_marker (m); |
1565 | m = next; | |
4a4a9db5 KH |
1566 | } |
1567 | } | |
1568 | else | |
1ab256cb | 1569 | { |
4a4a9db5 | 1570 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1571 | and leave them pointing nowhere. */ |
65745fad | 1572 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1573 | { |
65745fad | 1574 | struct Lisp_Marker *next = m->next; |
336cd056 | 1575 | m->buffer = 0; |
65745fad SM |
1576 | m->next = NULL; |
1577 | m = next; | |
336cd056 | 1578 | } |
65745fad | 1579 | BUF_MARKERS (b) = NULL; |
336cd056 | 1580 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1581 | |
1582 | /* Perhaps we should explicitly free the interval tree here... */ | |
1583 | } | |
33f7013e | 1584 | |
2f3f993b RS |
1585 | /* Reset the local variables, so that this buffer's local values |
1586 | won't be protected from GC. They would be protected | |
1587 | if they happened to remain encached in their symbols. | |
1588 | This gets rid of them for certain. */ | |
1589 | swap_out_buffer_local_variables (b); | |
13de9290 | 1590 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1591 | |
1ab256cb | 1592 | b->name = Qnil; |
336cd056 | 1593 | |
9ac0d9e0 | 1594 | BLOCK_INPUT; |
336cd056 | 1595 | if (! b->base_buffer) |
b86af064 | 1596 | free_buffer_text (b); |
336cd056 | 1597 | |
28e969dd JB |
1598 | if (b->newline_cache) |
1599 | { | |
1600 | free_region_cache (b->newline_cache); | |
1601 | b->newline_cache = 0; | |
1602 | } | |
1603 | if (b->width_run_cache) | |
1604 | { | |
1605 | free_region_cache (b->width_run_cache); | |
1606 | b->width_run_cache = 0; | |
1607 | } | |
1608 | b->width_table = Qnil; | |
9ac0d9e0 | 1609 | UNBLOCK_INPUT; |
1ab256cb RM |
1610 | b->undo_list = Qnil; |
1611 | ||
1612 | return Qt; | |
1613 | } | |
1614 | \f | |
36a8c287 JB |
1615 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1616 | we do this each time BUF is selected visibly, the more recently | |
1617 | selected buffers are always closer to the front of the list. This | |
1618 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1619 | |
01136e9b | 1620 | void |
1ab256cb RM |
1621 | record_buffer (buf) |
1622 | Lisp_Object buf; | |
1623 | { | |
1624 | register Lisp_Object link, prev; | |
773fbdb9 | 1625 | Lisp_Object frame; |
9ba9623d | 1626 | frame = selected_frame; |
1ab256cb RM |
1627 | |
1628 | prev = Qnil; | |
7539e11f | 1629 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1630 | { |
7539e11f | 1631 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1632 | break; |
1633 | prev = link; | |
1634 | } | |
1635 | ||
36a8c287 JB |
1636 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1637 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1638 | |
265a9e55 | 1639 | if (NILP (prev)) |
7539e11f | 1640 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1641 | else |
f3fbd155 | 1642 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1643 | |
f3fbd155 | 1644 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1645 | Vbuffer_alist = link; |
7962a441 | 1646 | |
a18b8cb5 | 1647 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1648 | |
a18b8cb5 KL |
1649 | prev = Qnil; |
1650 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1651 | link = XCDR (link)) | |
1652 | { | |
1653 | if (EQ (XCAR (link), buf)) | |
1654 | { | |
1655 | if (NILP (prev)) | |
1656 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1657 | else | |
1658 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1659 | break; | |
1660 | } | |
1661 | prev = link; | |
1662 | } | |
1663 | ||
7962a441 RS |
1664 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1665 | ||
1666 | prev = Qnil; | |
773fbdb9 | 1667 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1668 | link = XCDR (link)) |
7962a441 | 1669 | { |
7539e11f | 1670 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1671 | break; |
1672 | prev = link; | |
1673 | } | |
1674 | ||
1675 | /* Effectively do delq. */ | |
1676 | ||
1677 | if (CONSP (link)) | |
1678 | { | |
1679 | if (NILP (prev)) | |
773fbdb9 | 1680 | set_frame_buffer_list (frame, |
7539e11f | 1681 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1682 | else |
f3fbd155 | 1683 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1684 | |
f3fbd155 | 1685 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1686 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1687 | } |
1688 | else | |
773fbdb9 | 1689 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1690 | } |
1691 | ||
a9ee7a59 | 1692 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1693 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1694 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1695 | according to `default-major-mode'. |
018ba359 | 1696 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1697 | the current buffer's major mode. */) |
1698 | (buffer) | |
a2428fa2 | 1699 | Lisp_Object buffer; |
a9ee7a59 KH |
1700 | { |
1701 | int count; | |
1702 | Lisp_Object function; | |
1703 | ||
ea4fddd8 JB |
1704 | CHECK_BUFFER (buffer); |
1705 | ||
71a0f2c6 | 1706 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1707 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1708 | function = find_symbol_value (intern ("initial-major-mode")); |
1709 | else | |
1710 | { | |
1711 | function = buffer_defaults.major_mode; | |
1712 | if (NILP (function) | |
1713 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1714 | function = current_buffer->major_mode; | |
1715 | } | |
177c0ea7 | 1716 | |
48265e61 DL |
1717 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1718 | return Qnil; | |
1719 | ||
aed13378 | 1720 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1721 | |
48265e61 DL |
1722 | /* To select a nonfundamental mode, |
1723 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1724 | |
1725 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1726 | ||
a2428fa2 | 1727 | Fset_buffer (buffer); |
48265e61 | 1728 | call0 (function); |
a9ee7a59 KH |
1729 | |
1730 | return unbind_to (count, Qnil); | |
1731 | } | |
1732 | ||
2594e0fd RS |
1733 | /* Switch to buffer BUFFER in the selected window. |
1734 | If NORECORD is non-nil, don't call record_buffer. */ | |
1735 | ||
1736 | Lisp_Object | |
c8804c4f MR |
1737 | switch_to_buffer_1 (buffer_or_name, norecord) |
1738 | Lisp_Object buffer_or_name, norecord; | |
2594e0fd | 1739 | { |
c8804c4f | 1740 | register Lisp_Object buffer; |
1ab256cb | 1741 | |
c8804c4f MR |
1742 | if (NILP (buffer_or_name)) |
1743 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1744 | else |
a9ee7a59 | 1745 | { |
c8804c4f MR |
1746 | buffer = Fget_buffer (buffer_or_name); |
1747 | if (NILP (buffer)) | |
a9ee7a59 | 1748 | { |
c8804c4f MR |
1749 | buffer = Fget_buffer_create (buffer_or_name); |
1750 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1751 | } |
1752 | } | |
c8804c4f | 1753 | Fset_buffer (buffer); |
265a9e55 | 1754 | if (NILP (norecord)) |
c8804c4f | 1755 | record_buffer (buffer); |
1ab256cb RM |
1756 | |
1757 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1758 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1759 | : selected_window, | |
c8804c4f | 1760 | buffer, Qnil); |
1ab256cb | 1761 | |
c8804c4f | 1762 | return buffer; |
1ab256cb RM |
1763 | } |
1764 | ||
88970542 JL |
1765 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1766 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1767 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1768 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1769 | nil. Return the buffer switched to. | |
a6dced2a | 1770 | |
ee50ff07 MR |
1771 | If BUFFER-OR-NAME is a string and does not identify an existing |
1772 | buffer, create a new buffer with that name. Interactively, if | |
1773 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1774 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1775 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1776 | |
ee50ff07 MR |
1777 | Optional second arg NORECORD non-nil means do not put this buffer |
1778 | at the front of the list of recently selected ones. This | |
1779 | function returns the buffer it switched to as a Lisp object. | |
1780 | ||
1781 | If the selected window is the minibuffer window or dedicated to | |
1782 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1783 | |
1784 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1785 | within a Lisp program! Use `set-buffer' instead. That avoids |
1786 | messing with the window-buffer correspondences. */) | |
c8804c4f MR |
1787 | (buffer_or_name, norecord) |
1788 | Lisp_Object buffer_or_name, norecord; | |
2594e0fd RS |
1789 | { |
1790 | char *err; | |
1791 | ||
c8804c4f | 1792 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1793 | { |
611ac521 RS |
1794 | /* Basically a NOP. Avoid signalling an error in the case where |
1795 | the selected window is dedicated, or a minibuffer. */ | |
1796 | ||
c8804c4f MR |
1797 | /* But do put this buffer at the front of the buffer list, unless |
1798 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1799 | at the front of the main buffer-list already, we still want to | |
1800 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1801 | if (NILP (norecord)) |
c8804c4f MR |
1802 | record_buffer (buffer_or_name); |
1803 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1804 | } |
61313fa3 SM |
1805 | else if (EQ (minibuf_window, selected_window) |
1806 | /* If `dedicated' is neither nil nor t, it means it's | |
1807 | dedicatedness can be overridden by an explicit request | |
1808 | such as a call to switch-to-buffer. */ | |
1809 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1810 | /* We can't use the selected window so let `pop-to-buffer' try some |
1811 | other window. */ | |
1812 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1813 | else | |
1814 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1815 | } |
1816 | ||
1ab256cb | 1817 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 MB |
1818 | doc: /* Return the current buffer as a Lisp object. */) |
1819 | () | |
1ab256cb RM |
1820 | { |
1821 | register Lisp_Object buf; | |
67180c6a | 1822 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1823 | return buf; |
1824 | } | |
1825 | \f | |
7ec44ec6 GM |
1826 | /* Set the current buffer to B. |
1827 | ||
1828 | We previously set windows_or_buffers_changed here to invalidate | |
1829 | global unchanged information in beg_unchanged and end_unchanged. | |
1830 | This is no longer necessary because we now compute unchanged | |
1831 | information on a buffer-basis. Every action affecting other | |
1832 | windows than the selected one requires a select_window at some | |
1833 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1834 | |
1835 | void | |
1836 | set_buffer_internal (b) | |
1837 | register struct buffer *b; | |
1838 | { | |
b5a225b4 | 1839 | if (current_buffer != b) |
7ec44ec6 | 1840 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1841 | } |
1842 | ||
1843 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1844 | This is used by redisplay. */ | |
1845 | ||
1846 | void | |
1847 | set_buffer_internal_1 (b) | |
1848 | register struct buffer *b; | |
1849 | { | |
1850 | register struct buffer *old_buf; | |
1851 | register Lisp_Object tail, valcontents; | |
1852 | Lisp_Object tem; | |
1853 | ||
b86af064 | 1854 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1855 | if (b->text->beg == NULL) |
b86af064 GM |
1856 | enlarge_buffer_text (b, 0); |
1857 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1858 | |
c7aa5005 KH |
1859 | if (current_buffer == b) |
1860 | return; | |
1861 | ||
1ab256cb RM |
1862 | old_buf = current_buffer; |
1863 | current_buffer = b; | |
1864 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1865 | ||
336cd056 RS |
1866 | if (old_buf) |
1867 | { | |
1868 | /* Put the undo list back in the base buffer, so that it appears | |
1869 | that an indirect buffer shares the undo list of its base. */ | |
1870 | if (old_buf->base_buffer) | |
1871 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1872 | ||
1873 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1874 | when it is not current, update them now. */ | |
1875 | if (! NILP (old_buf->pt_marker)) | |
1876 | { | |
1877 | Lisp_Object obuf; | |
1878 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1879 | set_marker_both (old_buf->pt_marker, obuf, |
1880 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1881 | } |
1882 | if (! NILP (old_buf->begv_marker)) | |
1883 | { | |
1884 | Lisp_Object obuf; | |
1885 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1886 | set_marker_both (old_buf->begv_marker, obuf, |
1887 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1888 | } |
1889 | if (! NILP (old_buf->zv_marker)) | |
1890 | { | |
1891 | Lisp_Object obuf; | |
1892 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1893 | set_marker_both (old_buf->zv_marker, obuf, |
1894 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1895 | } |
1896 | } | |
1897 | ||
1898 | /* Get the undo list from the base buffer, so that it appears | |
1899 | that an indirect buffer shares the undo list of its base. */ | |
1900 | if (b->base_buffer) | |
1901 | b->undo_list = b->base_buffer->undo_list; | |
1902 | ||
1903 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1904 | when it is not current, fetch them now. */ | |
1905 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1906 | { |
1907 | BUF_PT (b) = marker_position (b->pt_marker); | |
1908 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1909 | } | |
336cd056 | 1910 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1911 | { |
1912 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1913 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1914 | } | |
336cd056 | 1915 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1916 | { |
1917 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1918 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1919 | } | |
336cd056 | 1920 | |
1ab256cb RM |
1921 | /* Look down buffer's list of local Lisp variables |
1922 | to find and update any that forward into C variables. */ | |
1923 | ||
65745fad | 1924 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1925 | { |
b5b98ff4 CY |
1926 | if (CONSP (XCAR (tail)) |
1927 | && SYMBOLP (XCAR (XCAR (tail))) | |
1928 | && (valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))), | |
1929 | (BUFFER_LOCAL_VALUEP (valcontents))) | |
3d871c85 | 1930 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1931 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
b5b98ff4 CY |
1932 | /* Just reference the variable to cause it to become set for |
1933 | this buffer. */ | |
7539e11f | 1934 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1935 | } |
1936 | ||
1937 | /* Do the same with any others that were local to the previous buffer */ | |
1938 | ||
1939 | if (old_buf) | |
65745fad | 1940 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1941 | { |
b5b98ff4 CY |
1942 | if (CONSP (tail) |
1943 | && SYMBOLP (XCAR (XCAR (tail))) | |
1944 | && (valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))), | |
1945 | (BUFFER_LOCAL_VALUEP (valcontents))) | |
3d871c85 | 1946 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1947 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
b5b98ff4 CY |
1948 | /* Just reference the variable to cause it to become set for |
1949 | this buffer. */ | |
7539e11f | 1950 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1951 | } |
1952 | } | |
1953 | ||
336cd056 | 1954 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1955 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1956 | |
1957 | void | |
1958 | set_buffer_temp (b) | |
1959 | struct buffer *b; | |
1960 | { | |
1961 | register struct buffer *old_buf; | |
1962 | ||
1963 | if (current_buffer == b) | |
1964 | return; | |
1965 | ||
1966 | old_buf = current_buffer; | |
1967 | current_buffer = b; | |
1968 | ||
1969 | if (old_buf) | |
1970 | { | |
1971 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1972 | when it is not current, update them now. */ | |
1973 | if (! NILP (old_buf->pt_marker)) | |
1974 | { | |
1975 | Lisp_Object obuf; | |
1976 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1977 | set_marker_both (old_buf->pt_marker, obuf, |
1978 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1979 | } |
1980 | if (! NILP (old_buf->begv_marker)) | |
1981 | { | |
1982 | Lisp_Object obuf; | |
1983 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1984 | set_marker_both (old_buf->begv_marker, obuf, |
1985 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1986 | } |
1987 | if (! NILP (old_buf->zv_marker)) | |
1988 | { | |
1989 | Lisp_Object obuf; | |
1990 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1991 | set_marker_both (old_buf->zv_marker, obuf, |
1992 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1993 | } |
1994 | } | |
1995 | ||
1996 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1997 | when it is not current, fetch them now. */ | |
1998 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1999 | { |
2000 | BUF_PT (b) = marker_position (b->pt_marker); | |
2001 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
2002 | } | |
336cd056 | 2003 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
2004 | { |
2005 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
2006 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
2007 | } | |
336cd056 | 2008 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
2009 | { |
2010 | BUF_ZV (b) = marker_position (b->zv_marker); | |
2011 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
2012 | } | |
336cd056 RS |
2013 | } |
2014 | ||
1ab256cb | 2015 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
2016 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
2017 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
2018 | also `save-excursion' when you want to make a buffer current | |
2019 | temporarily. This function does not display the buffer, so its effect | |
2020 | ends when the current command terminates. Use `switch-to-buffer' or | |
2021 | `pop-to-buffer' to switch buffers permanently. */) | |
2022 | (buffer_or_name) | |
2023 | register Lisp_Object buffer_or_name; | |
1ab256cb | 2024 | { |
c8804c4f MR |
2025 | register Lisp_Object buffer; |
2026 | buffer = Fget_buffer (buffer_or_name); | |
2027 | if (NILP (buffer)) | |
2028 | nsberror (buffer_or_name); | |
2029 | if (NILP (XBUFFER (buffer)->name)) | |
1ab256cb | 2030 | error ("Selecting deleted buffer"); |
c8804c4f MR |
2031 | set_buffer_internal (XBUFFER (buffer)); |
2032 | return buffer; | |
1ab256cb | 2033 | } |
d0628b06 RS |
2034 | |
2035 | /* Set the current buffer to BUFFER provided it is alive. */ | |
2036 | ||
2037 | Lisp_Object | |
2038 | set_buffer_if_live (buffer) | |
2039 | Lisp_Object buffer; | |
2040 | { | |
2041 | if (! NILP (XBUFFER (buffer)->name)) | |
2042 | Fset_buffer (buffer); | |
2043 | return Qnil; | |
2044 | } | |
1ab256cb RM |
2045 | \f |
2046 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
2047 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
2048 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
2049 | () | |
1ab256cb | 2050 | { |
a96b68f1 RS |
2051 | if (!NILP (current_buffer->read_only) |
2052 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2053 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2054 | return Qnil; |
2055 | } | |
2056 | ||
2057 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 2058 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 2059 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
2060 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
2061 | default. | |
2062 | ||
2063 | The argument may be a buffer name or an actual buffer object. If | |
2064 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
2065 | from the selected window if it is displayed there. If the selected |
2066 | window is dedicated to its buffer, delete that window if there are other | |
2067 | windows on the same frame. If the selected window is the only window on | |
2068 | its frame, iconify that frame. */) | |
c8804c4f MR |
2069 | (buffer_or_name) |
2070 | register Lisp_Object buffer_or_name; | |
1ab256cb | 2071 | { |
c8804c4f MR |
2072 | Lisp_Object buffer; |
2073 | ||
b271272a | 2074 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 2075 | if (NILP (buffer_or_name)) |
a5611885 | 2076 | { |
c58dab63 | 2077 | Lisp_Object tem; |
a2428fa2 | 2078 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2079 | |
c58dab63 | 2080 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2081 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2082 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2083 | { |
2084 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2085 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2086 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2087 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2088 | else | |
2089 | Fdelete_window (selected_window); | |
2090 | } | |
a5611885 | 2091 | } |
1ab256cb RM |
2092 | else |
2093 | { | |
c8804c4f MR |
2094 | buffer = Fget_buffer (buffer_or_name); |
2095 | if (NILP (buffer)) | |
2096 | nsberror (buffer_or_name); | |
b271272a JB |
2097 | } |
2098 | ||
a1a8b28e GM |
2099 | /* Move buffer to the end of the buffer list. Do nothing if the |
2100 | buffer is killed. */ | |
2101 | if (!NILP (XBUFFER (buffer)->name)) | |
2102 | { | |
2103 | Lisp_Object aelt, link; | |
b271272a | 2104 | |
a1a8b28e GM |
2105 | aelt = Frassq (buffer, Vbuffer_alist); |
2106 | link = Fmemq (aelt, Vbuffer_alist); | |
2107 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2108 | XSETCDR (link, Qnil); |
a1a8b28e | 2109 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2110 | |
a18b8cb5 KL |
2111 | XFRAME (selected_frame)->buffer_list |
2112 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2113 | XFRAME (selected_frame)->buried_buffer_list | |
2114 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2115 | } |
dec989eb | 2116 | |
1ab256cb RM |
2117 | return Qnil; |
2118 | } | |
2119 | \f | |
c922bc55 | 2120 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2121 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2122 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2123 | so the buffer is truly empty after this. */) |
2124 | () | |
1ab256cb RM |
2125 | { |
2126 | Fwiden (); | |
c0d9a0c3 GM |
2127 | |
2128 | del_range (BEG, Z); | |
c280bc6a | 2129 | |
1ab256cb RM |
2130 | current_buffer->last_window_start = 1; |
2131 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2132 | if future size is less than past size. Use of erase-buffer | |
2133 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2134 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2135 | return Qnil; |
2136 | } | |
2137 | ||
01136e9b | 2138 | void |
1ab256cb RM |
2139 | validate_region (b, e) |
2140 | register Lisp_Object *b, *e; | |
2141 | { | |
b7826503 PJ |
2142 | CHECK_NUMBER_COERCE_MARKER (*b); |
2143 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2144 | |
2145 | if (XINT (*b) > XINT (*e)) | |
2146 | { | |
03192067 KH |
2147 | Lisp_Object tem; |
2148 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2149 | } |
2150 | ||
2151 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2152 | && XINT (*e) <= ZV)) | |
2153 | args_out_of_range (*b, *e); | |
2154 | } | |
2155 | \f | |
b05525fa RS |
2156 | /* Advance BYTE_POS up to a character boundary |
2157 | and return the adjusted position. */ | |
2158 | ||
2159 | static int | |
2160 | advance_to_char_boundary (byte_pos) | |
2161 | int byte_pos; | |
2162 | { | |
f8449323 | 2163 | int c; |
b05525fa | 2164 | |
f8449323 RS |
2165 | if (byte_pos == BEG) |
2166 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2167 | return BEG; |
f8449323 RS |
2168 | |
2169 | c = FETCH_BYTE (byte_pos); | |
2170 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2171 | { |
1be6387d | 2172 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2173 | multibyte sequence. */ |
a9bcded1 KH |
2174 | int orig_byte_pos = byte_pos; |
2175 | ||
2176 | do | |
2177 | { | |
2178 | byte_pos--; | |
2179 | c = FETCH_BYTE (byte_pos); | |
2180 | } | |
2181 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2182 | INC_POS (byte_pos); |
a9bcded1 KH |
2183 | if (byte_pos < orig_byte_pos) |
2184 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2185 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2186 | surely advance to the correct character boundary. If C is | |
2187 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2188 | } |
2189 | ||
20773569 | 2190 | return byte_pos; |
b05525fa RS |
2191 | } |
2192 | ||
baae5c2d | 2193 | #ifdef REL_ALLOC |
40b615d6 | 2194 | extern void r_alloc_reset_variable P_ ((POINTER_TYPE *, POINTER_TYPE *)); |
baae5c2d JR |
2195 | #endif /* REL_ALLOC */ |
2196 | ||
13cda5f9 SM |
2197 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2198 | 1, 1, 0, | |
2199 | doc: /* Swap the text between current buffer and BUFFER. */) | |
2200 | (buffer) | |
2201 | Lisp_Object buffer; | |
2202 | { | |
2203 | struct buffer *other_buffer; | |
2204 | CHECK_BUFFER (buffer); | |
2205 | other_buffer = XBUFFER (buffer); | |
2206 | ||
dc9cc574 CY |
2207 | if (NILP (other_buffer->name)) |
2208 | error ("Cannot swap a dead buffer's text"); | |
2209 | ||
13cda5f9 SM |
2210 | /* Actually, it probably works just fine. |
2211 | * if (other_buffer == current_buffer) | |
2212 | * error ("Cannot swap a buffer's text with itself"); */ | |
2213 | ||
2214 | /* Actually, this may be workable as well, tho probably only if they're | |
2215 | *both* indirect. */ | |
2216 | if (other_buffer->base_buffer | |
2217 | || current_buffer->base_buffer) | |
2218 | error ("Cannot swap indirect buffers's text"); | |
2219 | ||
2220 | { /* This is probably harder to make work. */ | |
2221 | struct buffer *other; | |
2222 | for (other = all_buffers; other; other = other->next) | |
2223 | if (other->base_buffer == other_buffer | |
2224 | || other->base_buffer == current_buffer) | |
2225 | error ("One of the buffers to swap has indirect buffers"); | |
2226 | } | |
2227 | ||
2228 | #define swapfield(field, type) \ | |
2229 | do { \ | |
2230 | type tmp##field = other_buffer->field; \ | |
2231 | other_buffer->field = current_buffer->field; \ | |
2232 | current_buffer->field = tmp##field; \ | |
2233 | } while (0) | |
2234 | ||
2235 | swapfield (own_text, struct buffer_text); | |
2236 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2237 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2238 | #ifdef REL_ALLOC |
40b615d6 JR |
2239 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2240 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2241 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2242 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2243 | #endif /* REL_ALLOC */ |
2244 | ||
13cda5f9 SM |
2245 | swapfield (pt, EMACS_INT); |
2246 | swapfield (pt_byte, EMACS_INT); | |
2247 | swapfield (begv, EMACS_INT); | |
2248 | swapfield (begv_byte, EMACS_INT); | |
2249 | swapfield (zv, EMACS_INT); | |
2250 | swapfield (zv_byte, EMACS_INT); | |
2251 | eassert (!current_buffer->base_buffer); | |
2252 | eassert (!other_buffer->base_buffer); | |
2253 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2254 | swapfield (newline_cache, struct region_cache *); | |
2255 | swapfield (width_run_cache, struct region_cache *); | |
2256 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2257 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2258 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2259 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2260 | swapfield (overlay_center, EMACS_INT); | |
2261 | swapfield (undo_list, Lisp_Object); | |
2262 | swapfield (mark, Lisp_Object); | |
13cda5f9 SM |
2263 | swapfield (enable_multibyte_characters, Lisp_Object); |
2264 | /* FIXME: Not sure what we should do with these *_marker fields. | |
2265 | Hopefully they're just nil anyway. */ | |
2266 | swapfield (pt_marker, Lisp_Object); | |
2267 | swapfield (begv_marker, Lisp_Object); | |
2268 | swapfield (zv_marker, Lisp_Object); | |
2269 | current_buffer->point_before_scroll = Qnil; | |
2270 | other_buffer->point_before_scroll = Qnil; | |
2271 | ||
2272 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2273 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2274 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2275 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2276 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2277 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2278 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2279 | { |
2280 | struct Lisp_Marker *m; | |
2281 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2282 | if (m->buffer == other_buffer) | |
2283 | m->buffer = current_buffer; | |
b8ff72fa SM |
2284 | else |
2285 | /* Since there's no indirect buffer in sight, markers on | |
2286 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2287 | eassert (!m->buffer); | |
13cda5f9 SM |
2288 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2289 | if (m->buffer == current_buffer) | |
2290 | m->buffer = other_buffer; | |
b8ff72fa SM |
2291 | else |
2292 | /* Since there's no indirect buffer in sight, markers on | |
2293 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2294 | eassert (!m->buffer); | |
13cda5f9 | 2295 | } |
126f1fc1 SM |
2296 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2297 | So since we just swapped the markers between the two buffers, we need | |
2298 | to undo the effect of this swap for window markers. */ | |
2299 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2300 | Lisp_Object buf1, buf2; | |
2301 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2302 | ||
2303 | while (NILP (Fmemq (w, ws))) | |
2304 | { | |
2305 | ws = Fcons (w, ws); | |
2306 | if (MARKERP (XWINDOW (w)->pointm) | |
2307 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2308 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2309 | Fset_marker (XWINDOW (w)->pointm, | |
2310 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2311 | XWINDOW (w)->buffer); | |
2312 | w = Fnext_window (w, Qt, Qt); | |
2313 | } | |
2314 | } | |
2315 | ||
13cda5f9 SM |
2316 | if (current_buffer->text->intervals) |
2317 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2318 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2319 | if (other_buffer->text->intervals) | |
2320 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2321 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2322 | ||
2323 | return Qnil; | |
2324 | } | |
2325 | ||
3ac81adb RS |
2326 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2327 | 1, 1, 0, | |
7ee72033 | 2328 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2329 | If FLAG is t, this makes the buffer a multibyte buffer. |
2330 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2331 | In these cases, the buffer contents remain unchanged as a sequence of |
2332 | bytes but the contents viewed as characters do change. | |
2333 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2334 | all eight-bit bytes to eight-bit characters. |
2335 | If the multibyte flag was really changed, undo information of the | |
2336 | current buffer is cleared. */) | |
7ee72033 | 2337 | (flag) |
3ac81adb RS |
2338 | Lisp_Object flag; |
2339 | { | |
65745fad | 2340 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2341 | struct buffer *other; |
458c8af4 | 2342 | int begv, zv; |
8d1203ea | 2343 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2344 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2345 | Lisp_Object old_undo = current_buffer->undo_list; |
2346 | struct gcpro gcpro1; | |
3ac81adb | 2347 | |
6e553d5e RS |
2348 | if (current_buffer->base_buffer) |
2349 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2350 | ||
70e77119 AS |
2351 | /* Do nothing if nothing actually changes. */ |
2352 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2353 | return flag; | |
2354 | ||
38babc07 KS |
2355 | GCPRO1 (old_undo); |
2356 | ||
2357 | /* Don't record these buffer changes. We will put a special undo entry | |
2358 | instead. */ | |
2359 | current_buffer->undo_list = Qt; | |
b05525fa | 2360 | |
3ac81adb RS |
2361 | /* If the cached position is for this buffer, clear it out. */ |
2362 | clear_charpos_cache (current_buffer); | |
2363 | ||
458c8af4 KH |
2364 | if (NILP (flag)) |
2365 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2366 | else | |
2367 | begv = BEGV, zv = ZV; | |
2368 | ||
a9bcded1 KH |
2369 | if (narrowed) |
2370 | Fwiden (); | |
2371 | ||
3ac81adb RS |
2372 | if (NILP (flag)) |
2373 | { | |
a9bcded1 KH |
2374 | int pos, stop; |
2375 | unsigned char *p; | |
2376 | ||
3ac81adb RS |
2377 | /* Do this first, so it can use CHAR_TO_BYTE |
2378 | to calculate the old correspondences. */ | |
2379 | set_intervals_multibyte (0); | |
2380 | ||
2381 | current_buffer->enable_multibyte_characters = Qnil; | |
2382 | ||
2383 | Z = Z_BYTE; | |
2384 | BEGV = BEGV_BYTE; | |
2385 | ZV = ZV_BYTE; | |
2386 | GPT = GPT_BYTE; | |
2387 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2388 | ||
60ebfdf3 | 2389 | |
65745fad SM |
2390 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2391 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2392 | |
2393 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2394 | pos = BEG; | |
2395 | stop = GPT; | |
2396 | p = BEG_ADDR; | |
2397 | while (1) | |
2398 | { | |
2399 | int c, bytes; | |
2400 | ||
2401 | if (pos == stop) | |
2402 | { | |
2403 | if (pos == Z) | |
2404 | break; | |
2405 | p = GAP_END_ADDR; | |
2406 | stop = Z; | |
2407 | } | |
8f348ed5 KH |
2408 | if (ASCII_BYTE_P (*p)) |
2409 | p++, pos++; | |
2410 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2411 | { |
62a6e103 | 2412 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 KH |
2413 | /* Delete all bytes for this 8-bit character but the |
2414 | last one, and change the last one to the charcter | |
2415 | code. */ | |
2416 | bytes--; | |
2417 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2418 | p = GAP_END_ADDR; | |
2419 | *p++ = c; | |
2420 | pos++; | |
2421 | if (begv > pos) | |
2422 | begv -= bytes; | |
2423 | if (zv > pos) | |
2424 | zv -= bytes; | |
2425 | stop = Z; | |
2426 | } | |
8f924df7 | 2427 | else |
8f348ed5 KH |
2428 | { |
2429 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2430 | p += bytes, pos += bytes; | |
2431 | } | |
a9bcded1 KH |
2432 | } |
2433 | if (narrowed) | |
2434 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2435 | } |
2436 | else | |
2437 | { | |
a9bcded1 KH |
2438 | int pt = PT; |
2439 | int pos, stop; | |
8f348ed5 | 2440 | unsigned char *p, *pend; |
a9bcded1 | 2441 | |
673c57d2 | 2442 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2443 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2444 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2445 | |
8f924df7 | 2446 | if (EQ (flag, Qt) |
a3a303df | 2447 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2448 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2449 | { | |
2450 | unsigned char *p = GPT_ADDR - 1; | |
2451 | ||
2452 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2453 | if (BASE_LEADING_CODE_P (*p)) | |
2454 | { | |
2455 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2456 | ||
2457 | move_gap_both (new_gpt, new_gpt); | |
2458 | } | |
2459 | } | |
2460 | ||
a9bcded1 KH |
2461 | /* Make the buffer contents valid as multibyte by converting |
2462 | 8-bit characters to multibyte form. */ | |
2463 | pos = BEG; | |
2464 | stop = GPT; | |
2465 | p = BEG_ADDR; | |
8f348ed5 | 2466 | pend = GPT_ADDR; |
a9bcded1 KH |
2467 | while (1) |
2468 | { | |
2469 | int bytes; | |
2470 | ||
2471 | if (pos == stop) | |
2472 | { | |
2473 | if (pos == Z) | |
2474 | break; | |
2475 | p = GAP_END_ADDR; | |
8f348ed5 | 2476 | pend = Z_ADDR; |
a9bcded1 KH |
2477 | stop = Z; |
2478 | } | |
177c0ea7 | 2479 | |
a3a303df KH |
2480 | if (ASCII_BYTE_P (*p)) |
2481 | p++, pos++; | |
8f924df7 | 2482 | else if (EQ (flag, Qt) && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) |
a9bcded1 KH |
2483 | p += bytes, pos += bytes; |
2484 | else | |
2485 | { | |
2486 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2487 | int c; |
a9bcded1 | 2488 | |
8f924df7 | 2489 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2490 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2491 | *p = tmp[0]; |
2492 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2493 | bytes--; | |
2494 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2495 | /* Now the gap is after the just inserted data. */ | |
2496 | pos = GPT; | |
2497 | p = GAP_END_ADDR; | |
2498 | if (pos <= begv) | |
2499 | begv += bytes; | |
2500 | if (pos <= zv) | |
2501 | zv += bytes; | |
2502 | if (pos <= pt) | |
2503 | pt += bytes; | |
31285a8f | 2504 | pend = Z_ADDR; |
a9bcded1 KH |
2505 | stop = Z; |
2506 | } | |
2507 | } | |
2508 | ||
2509 | if (pt != PT) | |
2510 | TEMP_SET_PT (pt); | |
2511 | ||
2512 | if (narrowed) | |
2513 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2514 | ||
3ac81adb RS |
2515 | /* Do this first, so that chars_in_text asks the right question. |
2516 | set_intervals_multibyte needs it too. */ | |
2517 | current_buffer->enable_multibyte_characters = Qt; | |
2518 | ||
b05525fa | 2519 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2520 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2521 | |
673c57d2 | 2522 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2523 | |
2524 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2525 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2526 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2527 | else |
2528 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2529 | |
2530 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2531 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2532 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2533 | else |
2534 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2535 | |
2536 | { | |
2537 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2538 | int pt; | |
2539 | ||
2540 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2541 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2542 | else |
2543 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2544 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2545 | } | |
3ac81adb RS |
2546 | |
2547 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2548 | |
2549 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2550 | getting confused by the markers that have not yet been updated. | |
2551 | It is also a signal that it should never create a marker. */ | |
65745fad | 2552 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2553 | |
65745fad | 2554 | for (; tail; tail = tail->next) |
3ac81adb | 2555 | { |
65745fad SM |
2556 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2557 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2558 | } |
b69f9797 RS |
2559 | |
2560 | /* Make sure no markers were put on the chain | |
2561 | while the chain value was incorrect. */ | |
65745fad | 2562 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2563 | abort (); |
2564 | ||
3ac81adb RS |
2565 | BUF_MARKERS (current_buffer) = markers; |
2566 | ||
2567 | /* Do this last, so it can calculate the new correspondences | |
2568 | between chars and bytes. */ | |
2569 | set_intervals_multibyte (1); | |
2570 | } | |
2571 | ||
38babc07 KS |
2572 | if (!EQ (old_undo, Qt)) |
2573 | { | |
2574 | /* Represent all the above changes by a special undo entry. */ | |
2575 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2576 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2577 | intern ("set-buffer-multibyte"), | |
2578 | NILP (flag) ? Qt : Qnil), | |
2579 | old_undo); | |
38babc07 KS |
2580 | } |
2581 | ||
2582 | UNGCPRO; | |
a9bcded1 | 2583 | |
724b203f GM |
2584 | /* Changing the multibyteness of a buffer means that all windows |
2585 | showing that buffer must be updated thoroughly. */ | |
2586 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2587 | ++windows_or_buffers_changed; | |
2588 | ||
abc9d959 RS |
2589 | /* Copy this buffer's new multibyte status |
2590 | into all of its indirect buffers. */ | |
2591 | for (other = all_buffers; other; other = other->next) | |
2592 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2593 | { |
2594 | other->enable_multibyte_characters | |
2595 | = current_buffer->enable_multibyte_characters; | |
2596 | other->prevent_redisplay_optimizations_p = 1; | |
2597 | } | |
abc9d959 | 2598 | |
ed00559d KH |
2599 | /* Restore the modifiedness of the buffer. */ |
2600 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2601 | Fset_buffer_modified_p (Qnil); | |
2602 | ||
2a2b50a9 | 2603 | #ifdef subprocesses |
172f9454 KH |
2604 | /* Update coding systems of this buffer's process (if any). */ |
2605 | { | |
2606 | Lisp_Object process; | |
2607 | ||
2608 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2609 | if (PROCESSP (process)) | |
2610 | setup_process_coding_systems (process); | |
2611 | } | |
2a2b50a9 | 2612 | #endif /* subprocesses */ |
172f9454 | 2613 | |
3ac81adb RS |
2614 | return flag; |
2615 | } | |
2616 | \f | |
1ab256cb | 2617 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2618 | 0, 0, 0, |
7ee72033 | 2619 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2620 | Most local variable bindings are eliminated so that the default values |
2621 | become effective once more. Also, the syntax table is set from | |
2622 | `standard-syntax-table', the local keymap is set to nil, | |
2623 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2624 | This function also forces redisplay of the mode line. | |
2625 | ||
2626 | Every function to select a new major mode starts by | |
2627 | calling this function. | |
2628 | ||
2629 | As a special exception, local variables whose names have | |
2630 | a non-nil `permanent-local' property are not eliminated by this function. | |
2631 | ||
2632 | The first thing this function does is run | |
7ee72033 MB |
2633 | the normal hook `change-major-mode-hook'. */) |
2634 | () | |
1ab256cb | 2635 | { |
fd186f07 | 2636 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2637 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2638 | |
3709505e | 2639 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2640 | remain swapped in, in their symbols. */ |
1ab256cb | 2641 | |
2f3f993b | 2642 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2643 | |
2644 | /* Actually eliminate all local bindings of this buffer. */ | |
2645 | ||
13de9290 | 2646 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2647 | |
1ab256cb RM |
2648 | /* Force mode-line redisplay. Useful here because all major mode |
2649 | commands call this function. */ | |
2650 | update_mode_lines++; | |
2651 | ||
2652 | return Qnil; | |
2653 | } | |
2f3f993b RS |
2654 | |
2655 | /* Make sure no local variables remain set up with buffer B | |
2656 | for their current values. */ | |
2657 | ||
2658 | static void | |
2659 | swap_out_buffer_local_variables (b) | |
2660 | struct buffer *b; | |
2661 | { | |
b5b98ff4 | 2662 | Lisp_Object oalist, alist, sym, buffer; |
2f3f993b RS |
2663 | |
2664 | XSETBUFFER (buffer, b); | |
2665 | oalist = b->local_var_alist; | |
2666 | ||
67ee9f6e | 2667 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2668 | { |
b5b98ff4 CY |
2669 | if (CONSP (XCAR (alist)) |
2670 | && (sym = XCAR (XCAR (alist)), SYMBOLP (sym)) | |
2671 | /* Need not do anything if some other buffer's binding is | |
2672 | now encached. */ | |
2673 | && EQ (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer, | |
2674 | buffer)) | |
2f3f993b | 2675 | { |
e7c10f83 SM |
2676 | /* Symbol is set up for this buffer's old local value: |
2677 | swap it out! */ | |
2678 | swap_in_global_binding (sym); | |
2f3f993b RS |
2679 | } |
2680 | } | |
2681 | } | |
1ab256cb | 2682 | \f |
2eec3b4e | 2683 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2684 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2685 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2686 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2687 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2688 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2689 | or where an overlay starts which ends at or after POS; |
624d2678 | 2690 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2691 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2692 | |
2693 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2694 | when this function is called. |
2695 | ||
2696 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2697 | If EXTEND is zero, we never extend the vector, | |
2698 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2699 | But we still return the total number of overlays. |
2700 | ||
2701 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2702 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2703 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2704 | |
2705 | int | |
ac869cf7 | 2706 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2707 | EMACS_INT pos; |
61d54cd5 | 2708 | int extend; |
2eec3b4e RS |
2709 | Lisp_Object **vec_ptr; |
2710 | int *len_ptr; | |
0f8b27ea SM |
2711 | EMACS_INT *next_ptr; |
2712 | EMACS_INT *prev_ptr; | |
ac869cf7 | 2713 | int change_req; |
1ab256cb | 2714 | { |
2410d73a SM |
2715 | Lisp_Object overlay, start, end; |
2716 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2717 | int idx = 0; |
2718 | int len = *len_ptr; | |
2719 | Lisp_Object *vec = *vec_ptr; | |
2720 | int next = ZV; | |
239c932b | 2721 | int prev = BEGV; |
61d54cd5 RS |
2722 | int inhibit_storing = 0; |
2723 | ||
2410d73a | 2724 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2725 | { |
239c932b | 2726 | int startpos, endpos; |
52f8ec73 | 2727 | |
2410d73a | 2728 | XSETMISC (overlay, tail); |
1ab256cb | 2729 | |
2eec3b4e RS |
2730 | start = OVERLAY_START (overlay); |
2731 | end = OVERLAY_END (overlay); | |
239c932b RS |
2732 | endpos = OVERLAY_POSITION (end); |
2733 | if (endpos < pos) | |
2734 | { | |
2735 | if (prev < endpos) | |
2736 | prev = endpos; | |
2737 | break; | |
2738 | } | |
413e06a4 RS |
2739 | startpos = OVERLAY_POSITION (start); |
2740 | /* This one ends at or after POS | |
daa1c109 | 2741 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2742 | if (prev < startpos && startpos < pos) |
2743 | prev = startpos; | |
239c932b RS |
2744 | if (endpos == pos) |
2745 | continue; | |
2eec3b4e RS |
2746 | if (startpos <= pos) |
2747 | { | |
2748 | if (idx == len) | |
2749 | { | |
61d54cd5 RS |
2750 | /* The supplied vector is full. |
2751 | Either make it bigger, or don't store any more in it. */ | |
2752 | if (extend) | |
2753 | { | |
0552666b GM |
2754 | /* Make it work with an initial len == 0. */ |
2755 | len *= 2; | |
2756 | if (len == 0) | |
2757 | len = 4; | |
2758 | *len_ptr = len; | |
61d54cd5 RS |
2759 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2760 | *vec_ptr = vec; | |
2761 | } | |
2762 | else | |
2763 | inhibit_storing = 1; | |
2eec3b4e | 2764 | } |
61d54cd5 RS |
2765 | |
2766 | if (!inhibit_storing) | |
2767 | vec[idx] = overlay; | |
2768 | /* Keep counting overlays even if we can't return them all. */ | |
2769 | idx++; | |
2eec3b4e RS |
2770 | } |
2771 | else if (startpos < next) | |
2772 | next = startpos; | |
2773 | } | |
2774 | ||
2410d73a | 2775 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2776 | { |
239c932b | 2777 | int startpos, endpos; |
52f8ec73 | 2778 | |
2410d73a | 2779 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2780 | |
2781 | start = OVERLAY_START (overlay); | |
2782 | end = OVERLAY_END (overlay); | |
2783 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2784 | if (pos < startpos) |
2eec3b4e RS |
2785 | { |
2786 | if (startpos < next) | |
2787 | next = startpos; | |
2788 | break; | |
2789 | } | |
239c932b RS |
2790 | endpos = OVERLAY_POSITION (end); |
2791 | if (pos < endpos) | |
2eec3b4e RS |
2792 | { |
2793 | if (idx == len) | |
2794 | { | |
61d54cd5 RS |
2795 | if (extend) |
2796 | { | |
4b0e44fc RS |
2797 | /* Make it work with an initial len == 0. */ |
2798 | len *= 2; | |
0552666b | 2799 | if (len == 0) |
4b0e44fc RS |
2800 | len = 4; |
2801 | *len_ptr = len; | |
61d54cd5 RS |
2802 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2803 | *vec_ptr = vec; | |
2804 | } | |
2805 | else | |
2806 | inhibit_storing = 1; | |
2eec3b4e | 2807 | } |
61d54cd5 RS |
2808 | |
2809 | if (!inhibit_storing) | |
2810 | vec[idx] = overlay; | |
2811 | idx++; | |
413e06a4 RS |
2812 | |
2813 | if (startpos < pos && startpos > prev) | |
2814 | prev = startpos; | |
2eec3b4e | 2815 | } |
239c932b RS |
2816 | else if (endpos < pos && endpos > prev) |
2817 | prev = endpos; | |
1d5f4c1d MB |
2818 | else if (endpos == pos && startpos > prev |
2819 | && (!change_req || startpos < pos)) | |
413e06a4 | 2820 | prev = startpos; |
1ab256cb RM |
2821 | } |
2822 | ||
239c932b RS |
2823 | if (next_ptr) |
2824 | *next_ptr = next; | |
2825 | if (prev_ptr) | |
2826 | *prev_ptr = prev; | |
2eec3b4e RS |
2827 | return idx; |
2828 | } | |
74514898 | 2829 | \f |
7723e095 MR |
2830 | /* Find all the overlays in the current buffer that overlap the range |
2831 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2832 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2833 | |
177c0ea7 | 2834 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2835 | Store in *LEN_PTR the size allocated for the vector. |
2836 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2837 | or ZV if there are no more overlays. | |
2838 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2839 | or BEGV if there are no previous overlays. | |
2840 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2841 | ||
2842 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2843 | when this function is called. | |
2844 | ||
2845 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2846 | If EXTEND is zero, we never extend the vector, | |
2847 | and we store only as many overlays as will fit. | |
2848 | But we still return the total number of overlays. */ | |
2849 | ||
a9b9a780 | 2850 | static int |
74514898 RS |
2851 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2852 | int beg, end; | |
2853 | int extend; | |
2854 | Lisp_Object **vec_ptr; | |
2855 | int *len_ptr; | |
2856 | int *next_ptr; | |
2857 | int *prev_ptr; | |
2858 | { | |
2410d73a SM |
2859 | Lisp_Object overlay, ostart, oend; |
2860 | struct Lisp_Overlay *tail; | |
74514898 RS |
2861 | int idx = 0; |
2862 | int len = *len_ptr; | |
2863 | Lisp_Object *vec = *vec_ptr; | |
2864 | int next = ZV; | |
2865 | int prev = BEGV; | |
2866 | int inhibit_storing = 0; | |
7723e095 | 2867 | int end_is_Z = end == Z; |
74514898 | 2868 | |
2410d73a | 2869 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2870 | { |
2871 | int startpos, endpos; | |
2872 | ||
2410d73a | 2873 | XSETMISC (overlay, tail); |
74514898 RS |
2874 | |
2875 | ostart = OVERLAY_START (overlay); | |
2876 | oend = OVERLAY_END (overlay); | |
2877 | endpos = OVERLAY_POSITION (oend); | |
2878 | if (endpos < beg) | |
2879 | { | |
2880 | if (prev < endpos) | |
2881 | prev = endpos; | |
2882 | break; | |
2883 | } | |
2884 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2885 | /* Count an interval if it overlaps the range, is empty at the |
2886 | start of the range, or is empty at END provided END denotes the | |
2887 | end of the buffer. */ | |
74514898 | 2888 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2889 | || (startpos == endpos |
2890 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2891 | { |
2892 | if (idx == len) | |
2893 | { | |
2894 | /* The supplied vector is full. | |
2895 | Either make it bigger, or don't store any more in it. */ | |
2896 | if (extend) | |
2897 | { | |
4b0e44fc RS |
2898 | /* Make it work with an initial len == 0. */ |
2899 | len *= 2; | |
2900 | if (len == 0) | |
2901 | len = 4; | |
2902 | *len_ptr = len; | |
74514898 RS |
2903 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2904 | *vec_ptr = vec; | |
2905 | } | |
2906 | else | |
2907 | inhibit_storing = 1; | |
2908 | } | |
2909 | ||
2910 | if (!inhibit_storing) | |
2911 | vec[idx] = overlay; | |
2912 | /* Keep counting overlays even if we can't return them all. */ | |
2913 | idx++; | |
2914 | } | |
2915 | else if (startpos < next) | |
2916 | next = startpos; | |
2917 | } | |
2918 | ||
2410d73a | 2919 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2920 | { |
2921 | int startpos, endpos; | |
2922 | ||
2410d73a | 2923 | XSETMISC (overlay, tail); |
74514898 RS |
2924 | |
2925 | ostart = OVERLAY_START (overlay); | |
2926 | oend = OVERLAY_END (overlay); | |
2927 | startpos = OVERLAY_POSITION (ostart); | |
2928 | if (end < startpos) | |
2929 | { | |
2930 | if (startpos < next) | |
2931 | next = startpos; | |
2932 | break; | |
2933 | } | |
2934 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2935 | /* Count an interval if it overlaps the range, is empty at the |
2936 | start of the range, or is empty at END provided END denotes the | |
2937 | end of the buffer. */ | |
74514898 | 2938 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2939 | || (startpos == endpos |
2940 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2941 | { |
2942 | if (idx == len) | |
2943 | { | |
2944 | if (extend) | |
2945 | { | |
4b0e44fc RS |
2946 | /* Make it work with an initial len == 0. */ |
2947 | len *= 2; | |
2948 | if (len == 0) | |
2949 | len = 4; | |
2950 | *len_ptr = len; | |
74514898 RS |
2951 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2952 | *vec_ptr = vec; | |
2953 | } | |
2954 | else | |
2955 | inhibit_storing = 1; | |
2956 | } | |
2957 | ||
2958 | if (!inhibit_storing) | |
2959 | vec[idx] = overlay; | |
2960 | idx++; | |
2961 | } | |
2962 | else if (endpos < beg && endpos > prev) | |
2963 | prev = endpos; | |
2964 | } | |
fc04fa47 | 2965 | |
74514898 RS |
2966 | if (next_ptr) |
2967 | *next_ptr = next; | |
2968 | if (prev_ptr) | |
2969 | *prev_ptr = prev; | |
2970 | return idx; | |
2971 | } | |
09a22085 GM |
2972 | |
2973 | ||
2974 | /* Return non-zero if there exists an overlay with a non-nil | |
2975 | `mouse-face' property overlapping OVERLAY. */ | |
2976 | ||
2977 | int | |
2978 | mouse_face_overlay_overlaps (overlay) | |
2979 | Lisp_Object overlay; | |
2980 | { | |
2981 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2982 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2983 | int n, i, size; |
09a22085 | 2984 | Lisp_Object *v, tem; |
177c0ea7 | 2985 | |
bfd8410f GM |
2986 | size = 10; |
2987 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2988 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2989 | if (n > size) | |
09a22085 | 2990 | { |
09a22085 GM |
2991 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2992 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2993 | } | |
2994 | ||
2995 | for (i = 0; i < n; ++i) | |
2996 | if (!EQ (v[i], overlay) | |
2997 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2998 | !NILP (tem))) | |
2999 | break; | |
3000 | ||
3001 | return i < n; | |
3002 | } | |
3003 | ||
3004 | ||
74514898 | 3005 | \f |
fc04fa47 KH |
3006 | /* Fast function to just test if we're at an overlay boundary. */ |
3007 | int | |
3008 | overlay_touches_p (pos) | |
3009 | int pos; | |
3010 | { | |
2410d73a SM |
3011 | Lisp_Object overlay; |
3012 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3013 | |
2410d73a | 3014 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
3015 | { |
3016 | int endpos; | |
3017 | ||
2410d73a | 3018 | XSETMISC (overlay ,tail); |
8e50cc2d | 3019 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
3020 | abort (); |
3021 | ||
3022 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3023 | if (endpos < pos) | |
3024 | break; | |
3025 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3026 | return 1; | |
3027 | } | |
3028 | ||
2410d73a | 3029 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
3030 | { |
3031 | int startpos; | |
3032 | ||
2410d73a | 3033 | XSETMISC (overlay, tail); |
8e50cc2d | 3034 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
3035 | abort (); |
3036 | ||
3037 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3038 | if (pos < startpos) | |
3039 | break; | |
3040 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3041 | return 1; | |
3042 | } | |
3043 | return 0; | |
3044 | } | |
2eec3b4e | 3045 | \f |
5985d248 KH |
3046 | struct sortvec |
3047 | { | |
3048 | Lisp_Object overlay; | |
3049 | int beg, end; | |
3050 | int priority; | |
3051 | }; | |
3052 | ||
3053 | static int | |
dfcf069d AS |
3054 | compare_overlays (v1, v2) |
3055 | const void *v1, *v2; | |
5985d248 | 3056 | { |
dfcf069d AS |
3057 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3058 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
3059 | if (s1->priority != s2->priority) |
3060 | return s1->priority - s2->priority; | |
3061 | if (s1->beg != s2->beg) | |
3062 | return s1->beg - s2->beg; | |
3063 | if (s1->end != s2->end) | |
3064 | return s2->end - s1->end; | |
3065 | return 0; | |
3066 | } | |
3067 | ||
3068 | /* Sort an array of overlays by priority. The array is modified in place. | |
3069 | The return value is the new size; this may be smaller than the original | |
3070 | size if some of the overlays were invalid or were window-specific. */ | |
3071 | int | |
3072 | sort_overlays (overlay_vec, noverlays, w) | |
3073 | Lisp_Object *overlay_vec; | |
3074 | int noverlays; | |
3075 | struct window *w; | |
3076 | { | |
3077 | int i, j; | |
3078 | struct sortvec *sortvec; | |
3079 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
3080 | ||
3081 | /* Put the valid and relevant overlays into sortvec. */ | |
3082 | ||
3083 | for (i = 0, j = 0; i < noverlays; i++) | |
3084 | { | |
0fa767e7 | 3085 | Lisp_Object tem; |
c99fc30f | 3086 | Lisp_Object overlay; |
5985d248 | 3087 | |
c99fc30f | 3088 | overlay = overlay_vec[i]; |
5985d248 KH |
3089 | if (OVERLAY_VALID (overlay) |
3090 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
3091 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3092 | { | |
0fa767e7 KH |
3093 | /* If we're interested in a specific window, then ignore |
3094 | overlays that are limited to some other window. */ | |
3095 | if (w) | |
5985d248 | 3096 | { |
0fa767e7 KH |
3097 | Lisp_Object window; |
3098 | ||
3099 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 3100 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3101 | continue; |
5985d248 | 3102 | } |
0fa767e7 KH |
3103 | |
3104 | /* This overlay is good and counts: put it into sortvec. */ | |
3105 | sortvec[j].overlay = overlay; | |
3106 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3107 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3108 | tem = Foverlay_get (overlay, Qpriority); | |
3109 | if (INTEGERP (tem)) | |
3110 | sortvec[j].priority = XINT (tem); | |
3111 | else | |
3112 | sortvec[j].priority = 0; | |
3113 | j++; | |
5985d248 KH |
3114 | } |
3115 | } | |
3116 | noverlays = j; | |
3117 | ||
3118 | /* Sort the overlays into the proper order: increasing priority. */ | |
3119 | ||
3120 | if (noverlays > 1) | |
3121 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3122 | ||
3123 | for (i = 0; i < noverlays; i++) | |
3124 | overlay_vec[i] = sortvec[i].overlay; | |
3125 | return (noverlays); | |
3126 | } | |
3127 | \f | |
bbbe9545 KH |
3128 | struct sortstr |
3129 | { | |
cb26008f | 3130 | Lisp_Object string, string2; |
bbbe9545 KH |
3131 | int size; |
3132 | int priority; | |
3133 | }; | |
3134 | ||
e8185fa8 KH |
3135 | struct sortstrlist |
3136 | { | |
3137 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3138 | int size; /* Allocated length of that array. */ | |
3139 | int used; /* How much of the array is currently in use. */ | |
3140 | int bytes; /* Total length of the strings in buf. */ | |
3141 | }; | |
3142 | ||
3143 | /* Buffers for storing information about the overlays touching a given | |
3144 | position. These could be automatic variables in overlay_strings, but | |
3145 | it's more efficient to hold onto the memory instead of repeatedly | |
3146 | allocating and freeing it. */ | |
3147 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3148 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3149 | |
3150 | /* Allocated length of overlay_str_buf. */ | |
3151 | static int overlay_str_len; | |
3152 | ||
bbbe9545 KH |
3153 | /* A comparison function suitable for passing to qsort. */ |
3154 | static int | |
3155 | cmp_for_strings (as1, as2) | |
3156 | char *as1, *as2; | |
3157 | { | |
3158 | struct sortstr *s1 = (struct sortstr *)as1; | |
3159 | struct sortstr *s2 = (struct sortstr *)as2; | |
3160 | if (s1->size != s2->size) | |
3161 | return s2->size - s1->size; | |
3162 | if (s1->priority != s2->priority) | |
3163 | return s1->priority - s2->priority; | |
3164 | return 0; | |
3165 | } | |
3166 | ||
e8185fa8 | 3167 | static void |
cb26008f | 3168 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 3169 | struct sortstrlist *ssl; |
cb26008f | 3170 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
3171 | int size; |
3172 | { | |
43d27a72 RS |
3173 | int nbytes; |
3174 | ||
e8185fa8 KH |
3175 | if (ssl->used == ssl->size) |
3176 | { | |
3177 | if (ssl->buf) | |
3178 | ssl->size *= 2; | |
3179 | else | |
3180 | ssl->size = 5; | |
3181 | ssl->buf = ((struct sortstr *) | |
3182 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3183 | } | |
3184 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3185 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3186 | ssl->buf[ssl->used].size = size; |
3187 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3188 | ssl->used++; | |
43d27a72 RS |
3189 | |
3190 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3191 | nbytes = SCHARS (str); |
43d27a72 | 3192 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3193 | nbytes = count_size_as_multibyte (SDATA (str), |
3194 | SBYTES (str)); | |
43d27a72 | 3195 | else |
d5db4077 | 3196 | nbytes = SBYTES (str); |
43d27a72 RS |
3197 | |
3198 | ssl->bytes += nbytes; | |
3199 | ||
cb26008f | 3200 | if (STRINGP (str2)) |
43d27a72 RS |
3201 | { |
3202 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3203 | nbytes = SCHARS (str2); |
43d27a72 | 3204 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3205 | nbytes = count_size_as_multibyte (SDATA (str2), |
3206 | SBYTES (str2)); | |
43d27a72 | 3207 | else |
d5db4077 | 3208 | nbytes = SBYTES (str2); |
43d27a72 RS |
3209 | |
3210 | ssl->bytes += nbytes; | |
3211 | } | |
e8185fa8 | 3212 | } |
bbbe9545 KH |
3213 | |
3214 | /* Return the concatenation of the strings associated with overlays that | |
3215 | begin or end at POS, ignoring overlays that are specific to a window | |
3216 | other than W. The strings are concatenated in the appropriate order: | |
3217 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3218 | lower. Normally all of the after-strings come first, but zero-sized |
3219 | overlays have their after-strings ride along with the before-strings | |
3220 | because it would look strange to print them inside-out. | |
3221 | ||
3222 | Returns the string length, and stores the contents indirectly through | |
3223 | PSTR, if that variable is non-null. The string may be overwritten by | |
3224 | subsequent calls. */ | |
6b5d3b89 | 3225 | |
bbbe9545 KH |
3226 | int |
3227 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3228 | EMACS_INT pos; |
bbbe9545 | 3229 | struct window *w; |
6b5d3b89 | 3230 | unsigned char **pstr; |
bbbe9545 | 3231 | { |
2410d73a SM |
3232 | Lisp_Object overlay, window, str; |
3233 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3234 | int startpos, endpos; |
43d27a72 | 3235 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3236 | |
e8185fa8 KH |
3237 | overlay_heads.used = overlay_heads.bytes = 0; |
3238 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3239 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3240 | { |
2410d73a | 3241 | XSETMISC (overlay, ov); |
c2d5b10f | 3242 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3243 | |
3244 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3245 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3246 | if (endpos < pos) | |
3247 | break; | |
3248 | if (endpos != pos && startpos != pos) | |
3249 | continue; | |
3250 | window = Foverlay_get (overlay, Qwindow); | |
3251 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3252 | continue; | |
e8185fa8 KH |
3253 | if (startpos == pos |
3254 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3255 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3256 | (startpos == endpos |
3257 | ? Foverlay_get (overlay, Qafter_string) | |
3258 | : Qnil), | |
3259 | Foverlay_get (overlay, Qpriority), | |
3260 | endpos - startpos); | |
3261 | else if (endpos == pos | |
3262 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3263 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3264 | Foverlay_get (overlay, Qpriority), |
3265 | endpos - startpos); | |
bbbe9545 | 3266 | } |
2410d73a | 3267 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3268 | { |
2410d73a SM |
3269 | XSETMISC (overlay, ov); |
3270 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3271 | |
3272 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3273 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3274 | if (startpos > pos) | |
3275 | break; | |
e8185fa8 KH |
3276 | if (endpos != pos && startpos != pos) |
3277 | continue; | |
3278 | window = Foverlay_get (overlay, Qwindow); | |
3279 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3280 | continue; | |
e8185fa8 KH |
3281 | if (startpos == pos |
3282 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3283 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3284 | (startpos == endpos |
3285 | ? Foverlay_get (overlay, Qafter_string) | |
3286 | : Qnil), | |
3287 | Foverlay_get (overlay, Qpriority), | |
3288 | endpos - startpos); | |
3289 | else if (endpos == pos | |
3290 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3291 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3292 | Foverlay_get (overlay, Qpriority), |
3293 | endpos - startpos); | |
bbbe9545 | 3294 | } |
e8185fa8 KH |
3295 | if (overlay_tails.used > 1) |
3296 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3297 | cmp_for_strings); | |
3298 | if (overlay_heads.used > 1) | |
3299 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3300 | cmp_for_strings); | |
3301 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3302 | { |
e8185fa8 | 3303 | Lisp_Object tem; |
bbbe9545 | 3304 | int i; |
9f4d7cde | 3305 | unsigned char *p; |
e8185fa8 | 3306 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3307 | |
3308 | if (total > overlay_str_len) | |
9f4d7cde RS |
3309 | { |
3310 | overlay_str_len = total; | |
3311 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3312 | total); | |
3313 | } | |
bbbe9545 | 3314 | p = overlay_str_buf; |
e8185fa8 | 3315 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3316 | { |
43d27a72 | 3317 | int nbytes; |
e8185fa8 | 3318 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3319 | nbytes = copy_text (SDATA (tem), p, |
3320 | SBYTES (tem), | |
43d27a72 RS |
3321 | STRING_MULTIBYTE (tem), multibyte); |
3322 | p += nbytes; | |
bbbe9545 | 3323 | } |
e8185fa8 | 3324 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3325 | { |
43d27a72 | 3326 | int nbytes; |
e8185fa8 | 3327 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3328 | nbytes = copy_text (SDATA (tem), p, |
3329 | SBYTES (tem), | |
43d27a72 RS |
3330 | STRING_MULTIBYTE (tem), multibyte); |
3331 | p += nbytes; | |
cb26008f KH |
3332 | tem = overlay_heads.buf[i].string2; |
3333 | if (STRINGP (tem)) | |
3334 | { | |
d5db4077 KR |
3335 | nbytes = copy_text (SDATA (tem), p, |
3336 | SBYTES (tem), | |
43d27a72 RS |
3337 | STRING_MULTIBYTE (tem), multibyte); |
3338 | p += nbytes; | |
cb26008f | 3339 | } |
bbbe9545 | 3340 | } |
cb26008f KH |
3341 | if (p != overlay_str_buf + total) |
3342 | abort (); | |
bbbe9545 KH |
3343 | if (pstr) |
3344 | *pstr = overlay_str_buf; | |
e8185fa8 | 3345 | return total; |
bbbe9545 | 3346 | } |
e8185fa8 | 3347 | return 0; |
bbbe9545 KH |
3348 | } |
3349 | \f | |
5c4f68f1 | 3350 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3351 | |
2eec3b4e | 3352 | void |
5c4f68f1 JB |
3353 | recenter_overlay_lists (buf, pos) |
3354 | struct buffer *buf; | |
c2d5b10f | 3355 | EMACS_INT pos; |
2eec3b4e | 3356 | { |
2410d73a SM |
3357 | Lisp_Object overlay, beg, end; |
3358 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3359 | |
3360 | /* See if anything in overlays_before should move to overlays_after. */ | |
3361 | ||
3362 | /* We don't strictly need prev in this loop; it should always be nil. | |
3363 | But we use it for symmetry and in case that should cease to be true | |
3364 | with some future change. */ | |
2410d73a SM |
3365 | prev = NULL; |
3366 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3367 | { |
2410d73a SM |
3368 | next = tail->next; |
3369 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3370 | |
3371 | /* If the overlay is not valid, get rid of it. */ | |
3372 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3373 | #if 1 |
3374 | abort (); | |
3375 | #else | |
2eec3b4e RS |
3376 | { |
3377 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3378 | if (!NILP (prev)) | |
7539e11f | 3379 | XCDR (prev) = next; |
2eec3b4e | 3380 | else |
5c4f68f1 | 3381 | buf->overlays_before = next; |
2eec3b4e RS |
3382 | tail = prev; |
3383 | continue; | |
3384 | } | |
52f8ec73 | 3385 | #endif |
1ab256cb | 3386 | |
2eec3b4e RS |
3387 | beg = OVERLAY_START (overlay); |
3388 | end = OVERLAY_END (overlay); | |
1ab256cb | 3389 | |
2eec3b4e | 3390 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3391 | { |
2eec3b4e RS |
3392 | /* OVERLAY needs to be moved. */ |
3393 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3394 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3395 | |
3396 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3397 | if (prev) |
3398 | prev->next = next; | |
2eec3b4e | 3399 | else |
5c4f68f1 | 3400 | buf->overlays_before = next; |
2eec3b4e RS |
3401 | |
3402 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3403 | other_prev = NULL; |
3404 | for (other = buf->overlays_after; other; | |
3405 | other_prev = other, other = other->next) | |
1ab256cb | 3406 | { |
6af718a4 | 3407 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3408 | |
2410d73a SM |
3409 | XSETMISC (otheroverlay, other); |
3410 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3411 | |
3412 | otherbeg = OVERLAY_START (otheroverlay); | |
3413 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3414 | break; | |
1ab256cb | 3415 | } |
2eec3b4e RS |
3416 | |
3417 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3418 | tail->next = other; |
3419 | if (other_prev) | |
3420 | other_prev->next = tail; | |
1ab256cb | 3421 | else |
5c4f68f1 | 3422 | buf->overlays_after = tail; |
2eec3b4e | 3423 | tail = prev; |
1ab256cb | 3424 | } |
2eec3b4e RS |
3425 | else |
3426 | /* We've reached the things that should stay in overlays_before. | |
3427 | All the rest of overlays_before must end even earlier, | |
3428 | so stop now. */ | |
3429 | break; | |
3430 | } | |
3431 | ||
3432 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3433 | prev = NULL; |
3434 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3435 | { |
2410d73a SM |
3436 | next = tail->next; |
3437 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3438 | |
3439 | /* If the overlay is not valid, get rid of it. */ | |
3440 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3441 | #if 1 |
3442 | abort (); | |
3443 | #else | |
2eec3b4e RS |
3444 | { |
3445 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3446 | if (!NILP (prev)) | |
7539e11f | 3447 | XCDR (prev) = next; |
2eec3b4e | 3448 | else |
5c4f68f1 | 3449 | buf->overlays_after = next; |
2eec3b4e RS |
3450 | tail = prev; |
3451 | continue; | |
3452 | } | |
52f8ec73 | 3453 | #endif |
2eec3b4e RS |
3454 | |
3455 | beg = OVERLAY_START (overlay); | |
3456 | end = OVERLAY_END (overlay); | |
3457 | ||
3458 | /* Stop looking, when we know that nothing further | |
3459 | can possibly end before POS. */ | |
3460 | if (OVERLAY_POSITION (beg) > pos) | |
3461 | break; | |
3462 | ||
3463 | if (OVERLAY_POSITION (end) <= pos) | |
3464 | { | |
3465 | /* OVERLAY needs to be moved. */ | |
3466 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3467 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3468 | |
3469 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3470 | if (prev) |
3471 | prev->next = next; | |
2eec3b4e | 3472 | else |
5c4f68f1 | 3473 | buf->overlays_after = next; |
2eec3b4e RS |
3474 | |
3475 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3476 | other_prev = NULL; |
3477 | for (other = buf->overlays_before; other; | |
3478 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3479 | { |
3480 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3481 | |
2410d73a SM |
3482 | XSETMISC (otheroverlay, other); |
3483 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3484 | |
3485 | otherend = OVERLAY_END (otheroverlay); | |
3486 | if (OVERLAY_POSITION (otherend) <= where) | |
3487 | break; | |
3488 | } | |
3489 | ||
3490 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3491 | tail->next = other; |
3492 | if (other_prev) | |
3493 | other_prev->next = tail; | |
2eec3b4e | 3494 | else |
5c4f68f1 | 3495 | buf->overlays_before = tail; |
2eec3b4e RS |
3496 | tail = prev; |
3497 | } | |
3498 | } | |
3499 | ||
c2d5b10f | 3500 | buf->overlay_center = pos; |
2eec3b4e | 3501 | } |
2b1bdf65 | 3502 | |
423cdb46 KH |
3503 | void |
3504 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3505 | EMACS_INT pos; |
3506 | EMACS_INT length; | |
423cdb46 KH |
3507 | { |
3508 | /* After an insertion, the lists are still sorted properly, | |
3509 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3510 | if (current_buffer->overlay_center >= pos) |
3511 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3512 | } |
3513 | ||
3514 | void | |
3515 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3516 | EMACS_INT pos; |
3517 | EMACS_INT length; | |
423cdb46 | 3518 | { |
c2d5b10f | 3519 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3520 | /* The deletion was to our right. No change needed; the before- and |
3521 | after-lists are still consistent. */ | |
3522 | ; | |
c2d5b10f | 3523 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3524 | /* The deletion was to our left. We need to adjust the center value |
3525 | to account for the change in position, but the lists are consistent | |
3526 | given the new value. */ | |
c2d5b10f | 3527 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3528 | else |
3529 | /* We're right in the middle. There might be things on the after-list | |
3530 | that now belong on the before-list. Recentering will move them, | |
3531 | and also update the center point. */ | |
3532 | recenter_overlay_lists (current_buffer, pos); | |
3533 | } | |
3534 | ||
2b1bdf65 KH |
3535 | /* Fix up overlays that were garbled as a result of permuting markers |
3536 | in the range START through END. Any overlay with at least one | |
3537 | endpoint in this range will need to be unlinked from the overlay | |
3538 | list and reinserted in its proper place. | |
3539 | Such an overlay might even have negative size at this point. | |
6b61353c | 3540 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3541 | void |
6b61353c | 3542 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3543 | register int start, end; |
3544 | { | |
6af718a4 | 3545 | Lisp_Object overlay; |
2410d73a | 3546 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3547 | /* These are either nil, indicating that before_list or after_list |
3548 | should be assigned, or the cons cell the cdr of which should be | |
3549 | assigned. */ | |
2410d73a | 3550 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3551 | /* 'Parent', likewise, indicates a cons cell or |
3552 | current_buffer->overlays_before or overlays_after, depending | |
3553 | which loop we're in. */ | |
2410d73a | 3554 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3555 | int startpos, endpos; |
3556 | ||
3557 | /* This algorithm shifts links around instead of consing and GCing. | |
3558 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3559 | well-formed list except that its last element, the CDR of beforep |
3560 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3561 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3562 | that before_list isn't initialized, although it may look | |
3563 | strange. */ | |
2410d73a | 3564 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3565 | { |
2410d73a | 3566 | XSETMISC (overlay, tail); |
6b61353c | 3567 | |
2b1bdf65 | 3568 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3569 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3570 | ||
3571 | /* If the overlay is backwards, make it empty. */ | |
3572 | if (endpos < startpos) | |
3573 | { | |
3574 | startpos = endpos; | |
3575 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3576 | Qnil); | |
3577 | } | |
3578 | ||
2b1bdf65 KH |
3579 | if (endpos < start) |
3580 | break; | |
60ebfdf3 | 3581 | |
2b1bdf65 KH |
3582 | if (endpos < end |
3583 | || (startpos >= start && startpos < end)) | |
3584 | { | |
2b1bdf65 KH |
3585 | /* Add it to the end of the wrong list. Later on, |
3586 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3587 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3588 | { |
2410d73a | 3589 | if (!afterp) |
1138e742 KR |
3590 | after_list = tail; |
3591 | else | |
2410d73a | 3592 | afterp->next = tail; |
1138e742 | 3593 | afterp = tail; |
2b1bdf65 KH |
3594 | } |
3595 | else | |
3596 | { | |
2410d73a | 3597 | if (!beforep) |
1138e742 KR |
3598 | before_list = tail; |
3599 | else | |
2410d73a | 3600 | beforep->next = tail; |
1138e742 | 3601 | beforep = tail; |
2b1bdf65 | 3602 | } |
2410d73a SM |
3603 | if (!parent) |
3604 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3605 | else |
2410d73a SM |
3606 | parent->next = tail->next; |
3607 | tail = tail->next; | |
2b1bdf65 KH |
3608 | } |
3609 | else | |
2410d73a | 3610 | parent = tail, tail = parent->next; |
2b1bdf65 | 3611 | } |
2410d73a | 3612 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3613 | { |
2410d73a | 3614 | XSETMISC (overlay, tail); |
6b61353c | 3615 | |
2b1bdf65 | 3616 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3617 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3618 | ||
3619 | /* If the overlay is backwards, make it empty. */ | |
3620 | if (endpos < startpos) | |
3621 | { | |
3622 | startpos = endpos; | |
3623 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3624 | Qnil); |
6b61353c KH |
3625 | } |
3626 | ||
2b1bdf65 KH |
3627 | if (startpos >= end) |
3628 | break; | |
6b61353c | 3629 | |
2b1bdf65 KH |
3630 | if (startpos >= start |
3631 | || (endpos >= start && endpos < end)) | |
3632 | { | |
c2d5b10f | 3633 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3634 | { |
2410d73a | 3635 | if (!afterp) |
1138e742 KR |
3636 | after_list = tail; |
3637 | else | |
2410d73a | 3638 | afterp->next = tail; |
1138e742 | 3639 | afterp = tail; |
2b1bdf65 KH |
3640 | } |
3641 | else | |
3642 | { | |
2410d73a | 3643 | if (!beforep) |
1138e742 KR |
3644 | before_list = tail; |
3645 | else | |
2410d73a | 3646 | beforep->next = tail; |
1138e742 | 3647 | beforep = tail; |
2b1bdf65 | 3648 | } |
2410d73a SM |
3649 | if (!parent) |
3650 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3651 | else |
2410d73a SM |
3652 | parent->next = tail->next; |
3653 | tail = tail->next; | |
2b1bdf65 KH |
3654 | } |
3655 | else | |
2410d73a | 3656 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3657 | } |
3658 | ||
3659 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3660 | and let the recenter function make it sane again. */ | |
2410d73a | 3661 | if (beforep) |
1138e742 | 3662 | { |
2410d73a | 3663 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3664 | current_buffer->overlays_before = before_list; |
3665 | } | |
c2d5b10f | 3666 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3667 | |
2410d73a | 3668 | if (afterp) |
1138e742 | 3669 | { |
2410d73a | 3670 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3671 | current_buffer->overlays_after = after_list; |
3672 | } | |
c2d5b10f | 3673 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3674 | } |
3b06f880 KH |
3675 | |
3676 | /* We have two types of overlay: the one whose ending marker is | |
3677 | after-insertion-marker (this is the usual case) and the one whose | |
3678 | ending marker is before-insertion-marker. When `overlays_before' | |
3679 | contains overlays of the latter type and the former type in this | |
3680 | order and both overlays end at inserting position, inserting a text | |
3681 | increases only the ending marker of the latter type, which results | |
3682 | in incorrect ordering of `overlays_before'. | |
3683 | ||
3684 | This function fixes ordering of overlays in the slot | |
3685 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3686 | was at PREV, and now is at POS. */ | |
3687 | ||
01136e9b | 3688 | void |
3b06f880 KH |
3689 | fix_overlays_before (bp, prev, pos) |
3690 | struct buffer *bp; | |
c2d5b10f | 3691 | EMACS_INT prev, pos; |
3b06f880 | 3692 | { |
2410d73a SM |
3693 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3694 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3695 | Lisp_Object tem; | |
c2d5b10f | 3696 | EMACS_INT end; |
3b06f880 KH |
3697 | |
3698 | /* After the insertion, the several overlays may be in incorrect | |
3699 | order. The possibility is that, in the list `overlays_before', | |
3700 | an overlay which ends at POS appears after an overlay which ends | |
3701 | at PREV. Since POS is greater than PREV, we must fix the | |
3702 | ordering of these overlays, by moving overlays ends at POS before | |
3703 | the overlays ends at PREV. */ | |
3704 | ||
3705 | /* At first, find a place where disordered overlays should be linked | |
3706 | in. It is where an overlay which end before POS exists. (i.e. an | |
3707 | overlay whose ending marker is after-insertion-marker if disorder | |
3708 | exists). */ | |
2410d73a SM |
3709 | while (tail |
3710 | && (XSETMISC (tem, tail), | |
3711 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3712 | { |
3713 | parent = tail; | |
2410d73a | 3714 | tail = tail->next; |
1138e742 | 3715 | } |
3b06f880 KH |
3716 | |
3717 | /* If we don't find such an overlay, | |
3718 | or the found one ends before PREV, | |
3719 | or the found one is the last one in the list, | |
3720 | we don't have to fix anything. */ | |
f93ad4cf | 3721 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3722 | return; |
3723 | ||
1138e742 KR |
3724 | right_pair = parent; |
3725 | parent = tail; | |
2410d73a | 3726 | tail = tail->next; |
3b06f880 | 3727 | |
1138e742 | 3728 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3729 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3730 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3731 | we found an overlay which ends before PREV, the remaining | |
3732 | overlays are in correct order. */ | |
2410d73a | 3733 | while (tail) |
3b06f880 | 3734 | { |
2410d73a SM |
3735 | XSETMISC (tem, tail); |
3736 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3737 | |
3738 | if (end == pos) | |
3739 | { /* This overlay is disordered. */ | |
2410d73a | 3740 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3741 | |
3742 | /* Unlink the found overlay. */ | |
2410d73a SM |
3743 | tail = found->next; |
3744 | parent->next = tail; | |
1138e742 KR |
3745 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3746 | and link it into the right place. */ | |
2410d73a | 3747 | if (!right_pair) |
1138e742 | 3748 | { |
2410d73a | 3749 | found->next = bp->overlays_before; |
1138e742 KR |
3750 | bp->overlays_before = found; |
3751 | } | |
3752 | else | |
3753 | { | |
2410d73a SM |
3754 | found->next = right_pair->next; |
3755 | right_pair->next = found; | |
1138e742 | 3756 | } |
3b06f880 KH |
3757 | } |
3758 | else if (end == prev) | |
1138e742 KR |
3759 | { |
3760 | parent = tail; | |
2410d73a | 3761 | tail = tail->next; |
1138e742 | 3762 | } |
3b06f880 KH |
3763 | else /* No more disordered overlay. */ |
3764 | break; | |
3765 | } | |
3766 | } | |
2eec3b4e | 3767 | \f |
52f8ec73 | 3768 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3769 | doc: /* Return t if OBJECT is an overlay. */) |
3770 | (object) | |
52f8ec73 JB |
3771 | Lisp_Object object; |
3772 | { | |
3773 | return (OVERLAYP (object) ? Qt : Qnil); | |
3774 | } | |
3775 | ||
acac2700 | 3776 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3777 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3778 | If omitted, BUFFER defaults to the current buffer. |
3779 | BEG and END may be integers or markers. | |
a625ee20 RS |
3780 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3781 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3782 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3783 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3784 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3785 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3786 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3787 | Lisp_Object beg, end, buffer; |
acac2700 | 3788 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3789 | { |
3790 | Lisp_Object overlay; | |
5c4f68f1 | 3791 | struct buffer *b; |
2eec3b4e | 3792 | |
5c4f68f1 | 3793 | if (NILP (buffer)) |
67180c6a | 3794 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3795 | else |
b7826503 | 3796 | CHECK_BUFFER (buffer); |
883047b9 JB |
3797 | if (MARKERP (beg) |
3798 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3799 | error ("Marker points into wrong buffer"); | |
3800 | if (MARKERP (end) | |
3801 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3802 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3803 | |
b7826503 PJ |
3804 | CHECK_NUMBER_COERCE_MARKER (beg); |
3805 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3806 | |
883047b9 | 3807 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3808 | { |
c99fc30f KH |
3809 | Lisp_Object temp; |
3810 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3811 | } |
883047b9 JB |
3812 | |
3813 | b = XBUFFER (buffer); | |
3814 | ||
3815 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3816 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3817 | |
acac2700 RS |
3818 | if (!NILP (front_advance)) |
3819 | XMARKER (beg)->insertion_type = 1; | |
3820 | if (!NILP (rear_advance)) | |
3821 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3822 | |
48e2e3ba | 3823 | overlay = allocate_misc (); |
89ca3e1b | 3824 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3825 | XOVERLAY (overlay)->start = beg; |
3826 | XOVERLAY (overlay)->end = end; | |
3827 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3828 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3829 | |
177c0ea7 | 3830 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3831 | end = OVERLAY_END (overlay); |
c2d5b10f | 3832 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3833 | { |
3834 | if (b->overlays_after) | |
3835 | XOVERLAY (overlay)->next = b->overlays_after; | |
3836 | b->overlays_after = XOVERLAY (overlay); | |
3837 | } | |
2eec3b4e | 3838 | else |
2410d73a SM |
3839 | { |
3840 | if (b->overlays_before) | |
3841 | XOVERLAY (overlay)->next = b->overlays_before; | |
3842 | b->overlays_before = XOVERLAY (overlay); | |
3843 | } | |
2eec3b4e RS |
3844 | |
3845 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3846 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3847 | |
b61982dd JB |
3848 | /* We don't need to redisplay the region covered by the overlay, because |
3849 | the overlay has no properties at the moment. */ | |
3850 | ||
2eec3b4e RS |
3851 | return overlay; |
3852 | } | |
876aa27c RS |
3853 | \f |
3854 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3855 | ||
3856 | static void | |
3857 | modify_overlay (buf, start, end) | |
3858 | struct buffer *buf; | |
c2d5b10f | 3859 | EMACS_INT start, end; |
876aa27c | 3860 | { |
876aa27c RS |
3861 | if (start > end) |
3862 | { | |
3863 | int temp = start; | |
26f545d7 GM |
3864 | start = end; |
3865 | end = temp; | |
876aa27c RS |
3866 | } |
3867 | ||
481b5054 | 3868 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3869 | |
876aa27c RS |
3870 | /* If this is a buffer not in the selected window, |
3871 | we must do other windows. */ | |
3872 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3873 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3874 | /* If multiple windows show this buffer, we must do other windows. */ |
3875 | else if (buffer_shared > 1) | |
3876 | windows_or_buffers_changed = 1; | |
18700091 KS |
3877 | /* If we modify an overlay at the end of the buffer, we cannot |
3878 | be sure that window end is still valid. */ | |
3879 | else if (end >= ZV && start <= ZV) | |
3880 | windows_or_buffers_changed = 1; | |
876aa27c | 3881 | |
d8b9150f | 3882 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3883 | } |
2eec3b4e | 3884 | |
018ba359 | 3885 | \f |
2e34157c RS |
3886 | Lisp_Object Fdelete_overlay (); |
3887 | ||
2410d73a SM |
3888 | static struct Lisp_Overlay * |
3889 | unchain_overlay (list, overlay) | |
3890 | struct Lisp_Overlay *list, *overlay; | |
3891 | { | |
3892 | struct Lisp_Overlay *tmp, *prev; | |
3893 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3894 | if (tmp == overlay) | |
3895 | { | |
3896 | if (prev) | |
3897 | prev->next = tmp->next; | |
3898 | else | |
3899 | list = tmp->next; | |
3900 | overlay->next = NULL; | |
3901 | break; | |
3902 | } | |
3903 | return list; | |
3904 | } | |
3905 | ||
5c4f68f1 | 3906 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3907 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3908 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3909 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3910 | buffer. */) |
3911 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3912 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3913 | { |
0a4469c9 RS |
3914 | struct buffer *b, *ob; |
3915 | Lisp_Object obuffer; | |
aed13378 | 3916 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3917 | |
b7826503 | 3918 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3919 | if (NILP (buffer)) |
3920 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3921 | if (NILP (buffer)) |
67180c6a | 3922 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3923 | CHECK_BUFFER (buffer); |
883047b9 JB |
3924 | |
3925 | if (MARKERP (beg) | |
3926 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3927 | error ("Marker points into wrong buffer"); | |
3928 | if (MARKERP (end) | |
3929 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3930 | error ("Marker points into wrong buffer"); | |
3931 | ||
b7826503 PJ |
3932 | CHECK_NUMBER_COERCE_MARKER (beg); |
3933 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3934 | |
9d7608b7 KH |
3935 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3936 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3937 | |
b61982dd JB |
3938 | if (XINT (beg) > XINT (end)) |
3939 | { | |
c99fc30f KH |
3940 | Lisp_Object temp; |
3941 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3942 | } |
3943 | ||
9d7608b7 KH |
3944 | specbind (Qinhibit_quit, Qt); |
3945 | ||
0a4469c9 | 3946 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3947 | b = XBUFFER (buffer); |
8801a864 | 3948 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3949 | |
c82ed728 | 3950 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3951 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3952 | { |
3953 | /* Redisplay where the overlay was. */ | |
3954 | if (!NILP (obuffer)) | |
3955 | { | |
2e34157c RS |
3956 | int o_beg; |
3957 | int o_end; | |
50760c4a | 3958 | |
80509f2f RS |
3959 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3960 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3961 | |
2e34157c | 3962 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3963 | } |
3964 | ||
3965 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3966 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3967 | } |
c82ed728 JB |
3968 | else |
3969 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3970 | { | |
2e34157c | 3971 | int o_beg, o_end; |
c82ed728 | 3972 | |
80509f2f RS |
3973 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3974 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3975 | |
2e34157c RS |
3976 | if (o_beg == XINT (beg)) |
3977 | modify_overlay (b, o_end, XINT (end)); | |
3978 | else if (o_end == XINT (end)) | |
3979 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3980 | else |
3981 | { | |
2e34157c RS |
3982 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3983 | if (XINT (end) > o_end) o_end = XINT (end); | |
3984 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3985 | } |
3986 | } | |
b61982dd | 3987 | |
0a4469c9 RS |
3988 | if (!NILP (obuffer)) |
3989 | { | |
2410d73a SM |
3990 | ob->overlays_before |
3991 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3992 | ob->overlays_after | |
3993 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3994 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3995 | } |
5c4f68f1 JB |
3996 | |
3997 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3998 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3999 | |
177c0ea7 | 4000 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 4001 | end = OVERLAY_END (overlay); |
c2d5b10f | 4002 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 4003 | { |
8f924df7 KH |
4004 | XOVERLAY (overlay)->next = b->overlays_after; |
4005 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 4006 | } |
2eec3b4e | 4007 | else |
2410d73a | 4008 | { |
8f924df7 KH |
4009 | XOVERLAY (overlay)->next = b->overlays_before; |
4010 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 4011 | } |
2eec3b4e RS |
4012 | |
4013 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4014 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4015 | |
0a4469c9 | 4016 | return unbind_to (count, overlay); |
2eec3b4e RS |
4017 | } |
4018 | ||
4019 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
4020 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
4021 | (overlay) | |
5c4f68f1 | 4022 | Lisp_Object overlay; |
2eec3b4e | 4023 | { |
0a4469c9 | 4024 | Lisp_Object buffer; |
5c4f68f1 | 4025 | struct buffer *b; |
aed13378 | 4026 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 4027 | |
b7826503 | 4028 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4029 | |
0a4469c9 RS |
4030 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4031 | if (NILP (buffer)) | |
4032 | return Qnil; | |
4033 | ||
4034 | b = XBUFFER (buffer); | |
0a4469c9 | 4035 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4036 | |
2410d73a SM |
4037 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
4038 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
4039 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 4040 | modify_overlay (b, |
8231a9aa RS |
4041 | marker_position (OVERLAY_START (overlay)), |
4042 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
4043 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
4044 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
4045 | ||
e58c389d | 4046 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4047 | display optimizations for the affected buffer, on the basis that |
4048 | these strings may contain newlines. This is easier to do than to | |
4049 | check for that situation during redisplay. */ | |
4050 | if (!windows_or_buffers_changed | |
4051 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4052 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4053 | b->prevent_redisplay_optimizations_p = 1; | |
4054 | ||
0a4469c9 | 4055 | return unbind_to (count, Qnil); |
2eec3b4e RS |
4056 | } |
4057 | \f | |
8ebafa8d JB |
4058 | /* Overlay dissection functions. */ |
4059 | ||
4060 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
4061 | doc: /* Return the position at which OVERLAY starts. */) |
4062 | (overlay) | |
8ebafa8d JB |
4063 | Lisp_Object overlay; |
4064 | { | |
b7826503 | 4065 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4066 | |
4067 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4068 | } | |
4069 | ||
4070 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
4071 | doc: /* Return the position at which OVERLAY ends. */) |
4072 | (overlay) | |
8ebafa8d JB |
4073 | Lisp_Object overlay; |
4074 | { | |
b7826503 | 4075 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4076 | |
4077 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4078 | } | |
4079 | ||
4080 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4081 | doc: /* Return the buffer OVERLAY belongs to. |
4082 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 4083 | (overlay) |
8ebafa8d JB |
4084 | Lisp_Object overlay; |
4085 | { | |
b7826503 | 4086 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4087 | |
4088 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4089 | } | |
4090 | ||
4091 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4092 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4093 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
4094 | OVERLAY. */) |
4095 | (overlay) | |
8ebafa8d JB |
4096 | Lisp_Object overlay; |
4097 | { | |
b7826503 | 4098 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4099 | |
48e2e3ba | 4100 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4101 | } |
4102 | ||
4103 | \f | |
2eec3b4e | 4104 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4105 | doc: /* Return a list of the overlays that contain the character at POS. */) |
7ee72033 | 4106 | (pos) |
2eec3b4e RS |
4107 | Lisp_Object pos; |
4108 | { | |
4109 | int noverlays; | |
2eec3b4e RS |
4110 | Lisp_Object *overlay_vec; |
4111 | int len; | |
4112 | Lisp_Object result; | |
4113 | ||
b7826503 | 4114 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4115 | |
4116 | len = 10; | |
a9800ae8 | 4117 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
4118 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
4119 | ||
4120 | /* Put all the overlays we want in a vector in overlay_vec. | |
4121 | Store the length in len. */ | |
2a77a7d7 | 4122 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4123 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
4124 | |
4125 | /* Make a list of them all. */ | |
4126 | result = Flist (noverlays, overlay_vec); | |
4127 | ||
9ac0d9e0 | 4128 | xfree (overlay_vec); |
2eec3b4e RS |
4129 | return result; |
4130 | } | |
4131 | ||
74514898 | 4132 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4133 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4134 | Overlap means that at least one character is contained within the overlay |
4135 | and also contained within the specified region. | |
7723e095 MR |
4136 | Empty overlays are included in the result if they are located at BEG, |
4137 | between BEG and END, or at END provided END denotes the position at the | |
4138 | end of the buffer. */) | |
7ee72033 | 4139 | (beg, end) |
74514898 RS |
4140 | Lisp_Object beg, end; |
4141 | { | |
4142 | int noverlays; | |
4143 | Lisp_Object *overlay_vec; | |
4144 | int len; | |
4145 | Lisp_Object result; | |
4146 | ||
b7826503 PJ |
4147 | CHECK_NUMBER_COERCE_MARKER (beg); |
4148 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4149 | |
4150 | len = 10; | |
4151 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4152 | ||
4153 | /* Put all the overlays we want in a vector in overlay_vec. | |
4154 | Store the length in len. */ | |
4155 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4156 | (int *) 0, (int *) 0); | |
4157 | ||
4158 | /* Make a list of them all. */ | |
4159 | result = Flist (noverlays, overlay_vec); | |
4160 | ||
4161 | xfree (overlay_vec); | |
4162 | return result; | |
4163 | } | |
4164 | ||
2eec3b4e | 4165 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4166 | 1, 1, 0, |
7ee72033 | 4167 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4168 | If there are no overlay boundaries from POS to (point-max), |
4169 | the value is (point-max). */) | |
7ee72033 | 4170 | (pos) |
2eec3b4e RS |
4171 | Lisp_Object pos; |
4172 | { | |
4173 | int noverlays; | |
0f8b27ea | 4174 | EMACS_INT endpos; |
2eec3b4e RS |
4175 | Lisp_Object *overlay_vec; |
4176 | int len; | |
2eec3b4e RS |
4177 | int i; |
4178 | ||
b7826503 | 4179 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4180 | |
4181 | len = 10; | |
4182 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4183 | ||
4184 | /* Put all the overlays we want in a vector in overlay_vec. | |
4185 | Store the length in len. | |
4186 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4187 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4188 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4189 | |
4190 | /* If any of these overlays ends before endpos, | |
4191 | use its ending point instead. */ | |
4192 | for (i = 0; i < noverlays; i++) | |
4193 | { | |
4194 | Lisp_Object oend; | |
0f8b27ea | 4195 | EMACS_INT oendpos; |
2eec3b4e RS |
4196 | |
4197 | oend = OVERLAY_END (overlay_vec[i]); | |
4198 | oendpos = OVERLAY_POSITION (oend); | |
4199 | if (oendpos < endpos) | |
4200 | endpos = oendpos; | |
1ab256cb RM |
4201 | } |
4202 | ||
9ac0d9e0 | 4203 | xfree (overlay_vec); |
2eec3b4e RS |
4204 | return make_number (endpos); |
4205 | } | |
239c932b RS |
4206 | |
4207 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4208 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4209 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4210 | If there are no overlay boundaries from (point-min) to POS, |
4211 | the value is (point-min). */) | |
7ee72033 | 4212 | (pos) |
239c932b RS |
4213 | Lisp_Object pos; |
4214 | { | |
4215 | int noverlays; | |
0f8b27ea | 4216 | EMACS_INT prevpos; |
239c932b RS |
4217 | Lisp_Object *overlay_vec; |
4218 | int len; | |
239c932b | 4219 | |
b7826503 | 4220 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4221 | |
624bbdc4 RS |
4222 | /* At beginning of buffer, we know the answer; |
4223 | avoid bug subtracting 1 below. */ | |
4224 | if (XINT (pos) == BEGV) | |
4225 | return pos; | |
4226 | ||
017f0539 GM |
4227 | len = 10; |
4228 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4229 | ||
239c932b RS |
4230 | /* Put all the overlays we want in a vector in overlay_vec. |
4231 | Store the length in len. | |
daa1c109 | 4232 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4233 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4234 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4235 | |
239c932b RS |
4236 | xfree (overlay_vec); |
4237 | return make_number (prevpos); | |
4238 | } | |
2eec3b4e RS |
4239 | \f |
4240 | /* These functions are for debugging overlays. */ | |
4241 | ||
4242 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4243 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4244 | The car has all the overlays before the overlay center; |
4245 | the cdr has all the overlays after the overlay center. | |
4246 | Recentering overlays moves overlays between these lists. | |
4247 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4248 | However, the overlays you get are the real objects that the buffer uses. */) |
4249 | () | |
2eec3b4e | 4250 | { |
2410d73a SM |
4251 | struct Lisp_Overlay *ol; |
4252 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4253 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4254 | { | |
4255 | XSETMISC (tmp, ol); | |
4256 | before = Fcons (tmp, before); | |
4257 | } | |
4258 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4259 | { | |
4260 | XSETMISC (tmp, ol); | |
4261 | after = Fcons (tmp, after); | |
4262 | } | |
4263 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4264 | } |
4265 | ||
4266 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4267 | doc: /* Recenter the overlays of the current buffer around position POS. |
4268 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4269 | for positions far away from POS). */) | |
7ee72033 | 4270 | (pos) |
2eec3b4e RS |
4271 | Lisp_Object pos; |
4272 | { | |
b7826503 | 4273 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4274 | |
5c4f68f1 | 4275 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4276 | return Qnil; |
4277 | } | |
4278 | \f | |
4279 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4280 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4281 | (overlay, prop) | |
2eec3b4e RS |
4282 | Lisp_Object overlay, prop; |
4283 | { | |
b7826503 | 4284 | CHECK_OVERLAY (overlay); |
9a593927 | 4285 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4286 | } |
4287 | ||
4288 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4289 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4290 | (overlay, prop, value) | |
2eec3b4e RS |
4291 | Lisp_Object overlay, prop, value; |
4292 | { | |
48e2e3ba | 4293 | Lisp_Object tail, buffer; |
9d7608b7 | 4294 | int changed; |
2eec3b4e | 4295 | |
b7826503 | 4296 | CHECK_OVERLAY (overlay); |
b61982dd | 4297 | |
274a9425 RS |
4298 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4299 | ||
48e2e3ba | 4300 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4301 | CONSP (tail) && CONSP (XCDR (tail)); |
4302 | tail = XCDR (XCDR (tail))) | |
4303 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4304 | { |
7539e11f | 4305 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4306 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4307 | goto found; |
274a9425 | 4308 | } |
9d7608b7 KH |
4309 | /* It wasn't in the list, so add it to the front. */ |
4310 | changed = !NILP (value); | |
48e2e3ba KH |
4311 | XOVERLAY (overlay)->plist |
4312 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4313 | found: |
4314 | if (! NILP (buffer)) | |
4315 | { | |
4316 | if (changed) | |
876aa27c | 4317 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4318 | marker_position (OVERLAY_START (overlay)), |
4319 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4320 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4321 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4322 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4323 | Fdelete_overlay (overlay); | |
4324 | } | |
7d63db98 | 4325 | |
2eec3b4e | 4326 | return value; |
1ab256cb RM |
4327 | } |
4328 | \f | |
9115729e KH |
4329 | /* Subroutine of report_overlay_modification. */ |
4330 | ||
4331 | /* Lisp vector holding overlay hook functions to call. | |
4332 | Vector elements come in pairs. | |
4333 | Each even-index element is a list of hook functions. | |
4334 | The following odd-index element is the overlay they came from. | |
4335 | ||
4336 | Before the buffer change, we fill in this vector | |
4337 | as we call overlay hook functions. | |
4338 | After the buffer change, we get the functions to call from this vector. | |
4339 | This way we always call the same functions before and after the change. */ | |
4340 | static Lisp_Object last_overlay_modification_hooks; | |
4341 | ||
4342 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4343 | static int last_overlay_modification_hooks_used; | |
4344 | ||
4345 | /* Add one functionlist/overlay pair | |
4346 | to the end of last_overlay_modification_hooks. */ | |
4347 | ||
4348 | static void | |
4349 | add_overlay_mod_hooklist (functionlist, overlay) | |
4350 | Lisp_Object functionlist, overlay; | |
4351 | { | |
4352 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4353 | ||
4354 | if (last_overlay_modification_hooks_used == oldsize) | |
de0280a2 EZ |
4355 | last_overlay_modification_hooks = larger_vector |
4356 | (last_overlay_modification_hooks, oldsize * 2, Qnil); | |
3ae565b3 SM |
4357 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4358 | functionlist); last_overlay_modification_hooks_used++; | |
4359 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4360 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4361 | } |
4362 | \f | |
173f2a64 RS |
4363 | /* Run the modification-hooks of overlays that include |
4364 | any part of the text in START to END. | |
9115729e KH |
4365 | If this change is an insertion, also |
4366 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4367 | and the insert-after-hooks of overlay ending at START. |
4368 | ||
4369 | This is called both before and after the modification. | |
4370 | AFTER is nonzero when we call after the modification. | |
4371 | ||
9115729e KH |
4372 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4373 | When AFTER is nonzero, they are the start position, | |
4374 | the position after the inserted new text, | |
4375 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4376 | |
4377 | void | |
930a9140 | 4378 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4379 | Lisp_Object start, end; |
930a9140 RS |
4380 | int after; |
4381 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4382 | { |
2410d73a SM |
4383 | Lisp_Object prop, overlay; |
4384 | struct Lisp_Overlay *tail; | |
9115729e KH |
4385 | /* 1 if this change is an insertion. */ |
4386 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4387 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4388 | |
4389 | overlay = Qnil; | |
2410d73a | 4390 | tail = NULL; |
9115729e | 4391 | |
27c6b98e SM |
4392 | /* We used to run the functions as soon as we found them and only register |
4393 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4394 | case. But running elisp code as we traverse the list of overlays is | |
4395 | painful because the list can be modified by the elisp code so we had to | |
4396 | copy at several places. We now simply do a read-only traversal that | |
4397 | only collects the functions to run and we run them afterwards. It's | |
4398 | simpler, especially since all the code was already there. -stef */ | |
4399 | ||
a615c6dc | 4400 | if (!after) |
173f2a64 | 4401 | { |
a615c6dc SM |
4402 | /* We are being called before a change. |
4403 | Scan the overlays to find the functions to call. */ | |
4404 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4405 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4406 | { |
a615c6dc SM |
4407 | int startpos, endpos; |
4408 | Lisp_Object ostart, oend; | |
4409 | ||
2410d73a | 4410 | XSETMISC (overlay, tail); |
a615c6dc SM |
4411 | |
4412 | ostart = OVERLAY_START (overlay); | |
4413 | oend = OVERLAY_END (overlay); | |
4414 | endpos = OVERLAY_POSITION (oend); | |
4415 | if (XFASTINT (start) > endpos) | |
4416 | break; | |
4417 | startpos = OVERLAY_POSITION (ostart); | |
4418 | if (insertion && (XFASTINT (start) == startpos | |
4419 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4420 | { |
a615c6dc SM |
4421 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4422 | if (!NILP (prop)) | |
4423 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4424 | } |
a615c6dc SM |
4425 | if (insertion && (XFASTINT (start) == endpos |
4426 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4427 | { |
a615c6dc SM |
4428 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4429 | if (!NILP (prop)) | |
4430 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4431 | } |
a615c6dc SM |
4432 | /* Test for intersecting intervals. This does the right thing |
4433 | for both insertion and deletion. */ | |
4434 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4435 | { |
a615c6dc SM |
4436 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4437 | if (!NILP (prop)) | |
4438 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4439 | } |
173f2a64 | 4440 | } |
60ebfdf3 | 4441 | |
2410d73a | 4442 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4443 | { |
a615c6dc SM |
4444 | int startpos, endpos; |
4445 | Lisp_Object ostart, oend; | |
4446 | ||
2410d73a | 4447 | XSETMISC (overlay, tail); |
a615c6dc SM |
4448 | |
4449 | ostart = OVERLAY_START (overlay); | |
4450 | oend = OVERLAY_END (overlay); | |
4451 | startpos = OVERLAY_POSITION (ostart); | |
4452 | endpos = OVERLAY_POSITION (oend); | |
4453 | if (XFASTINT (end) < startpos) | |
4454 | break; | |
4455 | if (insertion && (XFASTINT (start) == startpos | |
4456 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4457 | { |
a615c6dc SM |
4458 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4459 | if (!NILP (prop)) | |
4460 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4461 | } |
a615c6dc SM |
4462 | if (insertion && (XFASTINT (start) == endpos |
4463 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4464 | { |
a615c6dc SM |
4465 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4466 | if (!NILP (prop)) | |
4467 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4468 | } |
a615c6dc SM |
4469 | /* Test for intersecting intervals. This does the right thing |
4470 | for both insertion and deletion. */ | |
4471 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4472 | { |
a615c6dc SM |
4473 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4474 | if (!NILP (prop)) | |
4475 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4476 | } |
173f2a64 RS |
4477 | } |
4478 | } | |
55b48893 | 4479 | |
a615c6dc SM |
4480 | GCPRO4 (overlay, arg1, arg2, arg3); |
4481 | { | |
4482 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4483 | First copy the vector contents, in case some of these hooks | |
4484 | do subsequent modification of the buffer. */ | |
4485 | int size = last_overlay_modification_hooks_used; | |
4486 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4487 | int i; | |
4488 | ||
4489 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4490 | copy, size * sizeof (Lisp_Object)); | |
4491 | gcpro1.var = copy; | |
4492 | gcpro1.nvars = size; | |
4493 | ||
4494 | for (i = 0; i < size;) | |
4495 | { | |
4496 | Lisp_Object prop, overlay; | |
4497 | prop = copy[i++]; | |
4498 | overlay = copy[i++]; | |
4499 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4500 | } | |
4501 | } | |
55b48893 | 4502 | UNGCPRO; |
173f2a64 RS |
4503 | } |
4504 | ||
4505 | static void | |
930a9140 RS |
4506 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4507 | Lisp_Object list, overlay; | |
4508 | int after; | |
4509 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4510 | { |
930a9140 | 4511 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4512 | |
930a9140 | 4513 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4514 | |
6d70a280 | 4515 | while (CONSP (list)) |
173f2a64 | 4516 | { |
930a9140 | 4517 | if (NILP (arg3)) |
6d70a280 | 4518 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4519 | else |
6d70a280 SM |
4520 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4521 | list = XCDR (list); | |
173f2a64 RS |
4522 | } |
4523 | UNGCPRO; | |
4524 | } | |
9d7608b7 KH |
4525 | |
4526 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4527 | property is set. */ | |
4528 | void | |
4529 | evaporate_overlays (pos) | |
c2d5b10f | 4530 | EMACS_INT pos; |
9d7608b7 | 4531 | { |
2410d73a SM |
4532 | Lisp_Object overlay, hit_list; |
4533 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4534 | |
4535 | hit_list = Qnil; | |
c2d5b10f | 4536 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4537 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4538 | { |
4539 | int endpos; | |
2410d73a | 4540 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4541 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4542 | if (endpos < pos) | |
4543 | break; | |
4544 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4545 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4546 | hit_list = Fcons (overlay, hit_list); |
4547 | } | |
4548 | else | |
2410d73a | 4549 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4550 | { |
4551 | int startpos; | |
2410d73a | 4552 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4553 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4554 | if (startpos > pos) | |
4555 | break; | |
4556 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4557 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4558 | hit_list = Fcons (overlay, hit_list); |
4559 | } | |
7539e11f KR |
4560 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4561 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4562 | } |
173f2a64 | 4563 | \f |
54dfdeb0 | 4564 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4565 | in the slot with offset OFFSET. */ |
4566 | ||
0fa3ba92 | 4567 | void |
ad97b375 SM |
4568 | buffer_slot_type_mismatch (newval, type) |
4569 | Lisp_Object newval; | |
64e16c3c | 4570 | int type; |
0fa3ba92 | 4571 | { |
ad97b375 | 4572 | Lisp_Object predicate; |
177c0ea7 | 4573 | |
64e16c3c | 4574 | switch (type) |
0fa3ba92 | 4575 | { |
2de9f71c | 4576 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4577 | case Lisp_String: predicate = Qstringp; break; |
4578 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4579 | default: abort (); | |
0fa3ba92 JB |
4580 | } |
4581 | ||
ad97b375 | 4582 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4583 | } |
7c02e886 | 4584 | |
0fa3ba92 | 4585 | \f |
b86af064 GM |
4586 | /*********************************************************************** |
4587 | Allocation with mmap | |
4588 | ***********************************************************************/ | |
4589 | ||
4590 | #ifdef USE_MMAP_FOR_BUFFERS | |
4591 | ||
4592 | #include <sys/types.h> | |
4593 | #include <sys/mman.h> | |
4594 | ||
4595 | #ifndef MAP_ANON | |
4596 | #ifdef MAP_ANONYMOUS | |
4597 | #define MAP_ANON MAP_ANONYMOUS | |
4598 | #else | |
4599 | #define MAP_ANON 0 | |
4600 | #endif | |
4601 | #endif | |
4602 | ||
09dfdf85 GM |
4603 | #ifndef MAP_FAILED |
4604 | #define MAP_FAILED ((void *) -1) | |
4605 | #endif | |
4606 | ||
b86af064 GM |
4607 | #include <stdio.h> |
4608 | #include <errno.h> | |
4609 | ||
4610 | #if MAP_ANON == 0 | |
4611 | #include <fcntl.h> | |
4612 | #endif | |
4613 | ||
4614 | #include "coding.h" | |
4615 | ||
4616 | ||
4617 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4618 | The current implementation lets the system select mapped | |
4619 | addresses; we're not using MAP_FIXED in general, except when | |
4620 | trying to enlarge regions. | |
4621 | ||
4622 | Each mapped region starts with a mmap_region structure, the user | |
4623 | area starts after that structure, aligned to MEM_ALIGN. | |
4624 | ||
4625 | +-----------------------+ | |
4626 | | struct mmap_info + | | |
4627 | | padding | | |
4628 | +-----------------------+ | |
4629 | | user data | | |
4630 | | | | |
4631 | | | | |
4632 | +-----------------------+ */ | |
4633 | ||
4634 | struct mmap_region | |
4635 | { | |
4636 | /* User-specified size. */ | |
4637 | size_t nbytes_specified; | |
177c0ea7 | 4638 | |
b86af064 GM |
4639 | /* Number of bytes mapped */ |
4640 | size_t nbytes_mapped; | |
4641 | ||
4642 | /* Pointer to the location holding the address of the memory | |
4643 | allocated with the mmap'd block. The variable actually points | |
4644 | after this structure. */ | |
4645 | POINTER_TYPE **var; | |
4646 | ||
4647 | /* Next and previous in list of all mmap'd regions. */ | |
4648 | struct mmap_region *next, *prev; | |
4649 | }; | |
4650 | ||
4651 | /* Doubly-linked list of mmap'd regions. */ | |
4652 | ||
4653 | static struct mmap_region *mmap_regions; | |
4654 | ||
4655 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4656 | /dev/zero will be opened on it. */ | |
4657 | ||
4658 | static int mmap_fd; | |
4659 | ||
4660 | /* Temporary storage for mmap_set_vars, see there. */ | |
4661 | ||
4662 | static struct mmap_region *mmap_regions_1; | |
4663 | static int mmap_fd_1; | |
4664 | ||
4665 | /* Page size on this system. */ | |
4666 | ||
4667 | static int mmap_page_size; | |
4668 | ||
4669 | /* 1 means mmap has been intialized. */ | |
4670 | ||
4671 | static int mmap_initialized_p; | |
4672 | ||
4673 | /* Value is X rounded up to the next multiple of N. */ | |
4674 | ||
4675 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4676 | ||
4677 | /* Size of mmap_region structure plus padding. */ | |
4678 | ||
4679 | #define MMAP_REGION_STRUCT_SIZE \ | |
4680 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4681 | ||
4682 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4683 | region, return a pointer to the start of the region. */ | |
4684 | ||
4685 | #define MMAP_REGION(P) \ | |
4686 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4687 | ||
4688 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4689 | to the start of the user-visible part of the region. */ | |
4690 | ||
4691 | #define MMAP_USER_AREA(P) \ | |
4692 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4693 | ||
4694 | #define MEM_ALIGN sizeof (double) | |
4695 | ||
7273faa1 DL |
4696 | /* Predicate returning true if part of the address range [START .. END] |
4697 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4698 | memory mapping. |
4699 | ||
4700 | Default is to conservativly assume the address range is occupied by | |
4701 | something else. This can be overridden by system configuration | |
4702 | files if system-specific means to determine this exists. */ | |
4703 | ||
4704 | #ifndef MMAP_ALLOCATED_P | |
4705 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4706 | #endif | |
4707 | ||
b86af064 GM |
4708 | /* Function prototypes. */ |
4709 | ||
4710 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4711 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4712 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4713 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4714 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4715 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4716 | static void mmap_init P_ ((void)); | |
4717 | ||
4718 | ||
4719 | /* Return a region overlapping address range START...END, or null if | |
4720 | none. END is not including, i.e. the last byte in the range | |
4721 | is at END - 1. */ | |
4722 | ||
4723 | static struct mmap_region * | |
4724 | mmap_find (start, end) | |
4725 | POINTER_TYPE *start, *end; | |
4726 | { | |
4727 | struct mmap_region *r; | |
4728 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4729 | |
b86af064 GM |
4730 | for (r = mmap_regions; r; r = r->next) |
4731 | { | |
4732 | char *rstart = (char *) r; | |
4733 | char *rend = rstart + r->nbytes_mapped; | |
4734 | ||
4735 | if (/* First byte of range, i.e. START, in this region? */ | |
4736 | (s >= rstart && s < rend) | |
4737 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4738 | || (e > rstart && e <= rend) | |
4739 | /* First byte of this region in the range? */ | |
4740 | || (rstart >= s && rstart < e) | |
4741 | /* Last byte of this region in the range? */ | |
4742 | || (rend > s && rend <= e)) | |
4743 | break; | |
4744 | } | |
4745 | ||
4746 | return r; | |
4747 | } | |
4748 | ||
4749 | ||
4750 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4751 | the region. Value is non-zero if successful. */ | |
4752 | ||
4753 | static int | |
4754 | mmap_free_1 (r) | |
4755 | struct mmap_region *r; | |
4756 | { | |
4757 | if (r->next) | |
4758 | r->next->prev = r->prev; | |
4759 | if (r->prev) | |
4760 | r->prev->next = r->next; | |
4761 | else | |
4762 | mmap_regions = r->next; | |
177c0ea7 | 4763 | |
1a15cca0 | 4764 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4765 | { |
4766 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4767 | return 0; | |
4768 | } | |
4769 | ||
4770 | return 1; | |
4771 | } | |
4772 | ||
4773 | ||
4774 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4775 | Value is non-zero if successful. */ | |
4776 | ||
4777 | static int | |
4778 | mmap_enlarge (r, npages) | |
4779 | struct mmap_region *r; | |
4780 | int npages; | |
4781 | { | |
4782 | char *region_end = (char *) r + r->nbytes_mapped; | |
4783 | size_t nbytes; | |
4784 | int success = 0; | |
4785 | ||
4786 | if (npages < 0) | |
4787 | { | |
4788 | /* Unmap pages at the end of the region. */ | |
4789 | nbytes = - npages * mmap_page_size; | |
4790 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4791 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4792 | else | |
4793 | { | |
4794 | r->nbytes_mapped -= nbytes; | |
4795 | success = 1; | |
4796 | } | |
4797 | } | |
4798 | else if (npages > 0) | |
4799 | { | |
b86af064 | 4800 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4801 | |
b86af064 GM |
4802 | /* Try to map additional pages at the end of the region. We |
4803 | cannot do this if the address range is already occupied by | |
4804 | something else because mmap deletes any previous mapping. | |
4805 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4806 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4807 | { |
4808 | POINTER_TYPE *p; | |
177c0ea7 | 4809 | |
b86af064 GM |
4810 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4811 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4812 | if (p == MAP_FAILED) | |
edaa9aed | 4813 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4814 | else if (p != (POINTER_TYPE *) region_end) |
4815 | { | |
4816 | /* Kernels are free to choose a different address. In | |
4817 | that case, unmap what we've mapped above; we have | |
4818 | no use for it. */ | |
4819 | if (munmap (p, nbytes) == -1) | |
4820 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4821 | } | |
4822 | else | |
4823 | { | |
4824 | r->nbytes_mapped += nbytes; | |
4825 | success = 1; | |
4826 | } | |
4827 | } | |
4828 | } | |
4829 | ||
4830 | return success; | |
4831 | } | |
4832 | ||
4833 | ||
4834 | /* Set or reset variables holding references to mapped regions. If | |
4835 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4836 | non-zero, set all variables to the start of the user-areas | |
4837 | of mapped regions. | |
4838 | ||
4839 | This function is called from Fdump_emacs to ensure that the dumped | |
4840 | Emacs doesn't contain references to memory that won't be mapped | |
4841 | when Emacs starts. */ | |
4842 | ||
4843 | void | |
4844 | mmap_set_vars (restore_p) | |
4845 | int restore_p; | |
4846 | { | |
4847 | struct mmap_region *r; | |
4848 | ||
4849 | if (restore_p) | |
4850 | { | |
4851 | mmap_regions = mmap_regions_1; | |
4852 | mmap_fd = mmap_fd_1; | |
4853 | for (r = mmap_regions; r; r = r->next) | |
4854 | *r->var = MMAP_USER_AREA (r); | |
4855 | } | |
4856 | else | |
4857 | { | |
4858 | for (r = mmap_regions; r; r = r->next) | |
4859 | *r->var = NULL; | |
4860 | mmap_regions_1 = mmap_regions; | |
4861 | mmap_regions = NULL; | |
4862 | mmap_fd_1 = mmap_fd; | |
4863 | mmap_fd = -1; | |
4864 | } | |
4865 | } | |
4866 | ||
4867 | ||
4868 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4869 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4870 | address of some variable which will use the data area. | |
4871 | ||
4872 | The allocation of 0 bytes is valid. | |
4873 | ||
4874 | If we can't allocate the necessary memory, set *VAR to null, and | |
4875 | return null. */ | |
4876 | ||
4877 | static POINTER_TYPE * | |
4878 | mmap_alloc (var, nbytes) | |
4879 | POINTER_TYPE **var; | |
4880 | size_t nbytes; | |
4881 | { | |
4882 | void *p; | |
4883 | size_t map; | |
4884 | ||
4885 | mmap_init (); | |
4886 | ||
4887 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4888 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4889 | mmap_fd, 0); | |
177c0ea7 | 4890 | |
b86af064 GM |
4891 | if (p == MAP_FAILED) |
4892 | { | |
4893 | if (errno != ENOMEM) | |
4894 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4895 | p = NULL; | |
4896 | } | |
4897 | else | |
4898 | { | |
4899 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4900 | |
b86af064 GM |
4901 | r->nbytes_specified = nbytes; |
4902 | r->nbytes_mapped = map; | |
4903 | r->var = var; | |
4904 | r->prev = NULL; | |
4905 | r->next = mmap_regions; | |
4906 | if (r->next) | |
4907 | r->next->prev = r; | |
4908 | mmap_regions = r; | |
177c0ea7 | 4909 | |
b86af064 GM |
4910 | p = MMAP_USER_AREA (p); |
4911 | } | |
177c0ea7 | 4912 | |
b86af064 GM |
4913 | return *var = p; |
4914 | } | |
4915 | ||
4916 | ||
4917 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4918 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4919 | and return this value. If more memory cannot be allocated, then | |
4920 | leave *VAR unchanged, and return null. */ | |
4921 | ||
4922 | static POINTER_TYPE * | |
4923 | mmap_realloc (var, nbytes) | |
4924 | POINTER_TYPE **var; | |
4925 | size_t nbytes; | |
4926 | { | |
4927 | POINTER_TYPE *result; | |
177c0ea7 | 4928 | |
b86af064 GM |
4929 | mmap_init (); |
4930 | ||
4931 | if (*var == NULL) | |
4932 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4933 | else if (nbytes == 0) |
b86af064 GM |
4934 | { |
4935 | mmap_free (var); | |
4936 | result = mmap_alloc (var, nbytes); | |
4937 | } | |
4938 | else | |
4939 | { | |
4940 | struct mmap_region *r = MMAP_REGION (*var); | |
4941 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4942 | |
b86af064 GM |
4943 | if (room < nbytes) |
4944 | { | |
4945 | /* Must enlarge. */ | |
4946 | POINTER_TYPE *old_ptr = *var; | |
4947 | ||
4948 | /* Try to map additional pages at the end of the region. | |
4949 | If that fails, allocate a new region, copy data | |
4950 | from the old region, then free it. */ | |
4951 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4952 | / mmap_page_size))) | |
4953 | { | |
4954 | r->nbytes_specified = nbytes; | |
4955 | *var = result = old_ptr; | |
4956 | } | |
4957 | else if (mmap_alloc (var, nbytes)) | |
4958 | { | |
4959 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4960 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4961 | result = *var; | |
4962 | r = MMAP_REGION (result); | |
4963 | r->nbytes_specified = nbytes; | |
4964 | } | |
4965 | else | |
4966 | { | |
4967 | *var = old_ptr; | |
4968 | result = NULL; | |
4969 | } | |
4970 | } | |
4971 | else if (room - nbytes >= mmap_page_size) | |
4972 | { | |
4973 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4974 | memory back to the system. |
4975 | ||
4976 | The extra parens are to make the division happens first, | |
4977 | on positive values, so we know it will round towards | |
4978 | zero. */ | |
bb63c5c9 | 4979 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4980 | result = *var; |
4981 | r->nbytes_specified = nbytes; | |
4982 | } | |
4983 | else | |
4984 | { | |
4985 | /* Leave it alone. */ | |
4986 | result = *var; | |
4987 | r->nbytes_specified = nbytes; | |
4988 | } | |
4989 | } | |
4990 | ||
4991 | return result; | |
4992 | } | |
4993 | ||
4994 | ||
4995 | /* Free a block of relocatable storage whose data is pointed to by | |
4996 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4997 | ||
4998 | static void | |
4999 | mmap_free (var) | |
5000 | POINTER_TYPE **var; | |
5001 | { | |
5002 | mmap_init (); | |
177c0ea7 | 5003 | |
b86af064 GM |
5004 | if (*var) |
5005 | { | |
5006 | mmap_free_1 (MMAP_REGION (*var)); | |
5007 | *var = NULL; | |
5008 | } | |
5009 | } | |
5010 | ||
5011 | ||
5012 | /* Perform necessary intializations for the use of mmap. */ | |
5013 | ||
5014 | static void | |
5015 | mmap_init () | |
5016 | { | |
5017 | #if MAP_ANON == 0 | |
5018 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
5019 | in a dumped Emacs. */ | |
5020 | if (mmap_fd <= 0) | |
5021 | { | |
5022 | /* No anonymous mmap -- we need the file descriptor. */ | |
5023 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
5024 | if (mmap_fd == -1) | |
5025 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
5026 | } | |
5027 | #endif /* MAP_ANON == 0 */ | |
5028 | ||
5029 | if (mmap_initialized_p) | |
5030 | return; | |
5031 | mmap_initialized_p = 1; | |
177c0ea7 | 5032 | |
b86af064 GM |
5033 | #if MAP_ANON != 0 |
5034 | mmap_fd = -1; | |
5035 | #endif | |
177c0ea7 | 5036 | |
b86af064 GM |
5037 | mmap_page_size = getpagesize (); |
5038 | } | |
5039 | ||
5040 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
5041 | ||
5042 | ||
5043 | \f | |
5044 | /*********************************************************************** | |
5045 | Buffer-text Allocation | |
5046 | ***********************************************************************/ | |
5047 | ||
5048 | #ifdef REL_ALLOC | |
5049 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
5050 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
5051 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
5052 | #endif /* REL_ALLOC */ | |
5053 | ||
5054 | ||
5055 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
5056 | ||
5057 | static void | |
5058 | alloc_buffer_text (b, nbytes) | |
5059 | struct buffer *b; | |
5060 | size_t nbytes; | |
5061 | { | |
5062 | POINTER_TYPE *p; | |
177c0ea7 | 5063 | |
b86af064 GM |
5064 | BLOCK_INPUT; |
5065 | #if defined USE_MMAP_FOR_BUFFERS | |
5066 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5067 | #elif defined REL_ALLOC | |
5068 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5069 | #else | |
815add84 | 5070 | p = xmalloc (nbytes); |
b86af064 | 5071 | #endif |
177c0ea7 | 5072 | |
b86af064 GM |
5073 | if (p == NULL) |
5074 | { | |
5075 | UNBLOCK_INPUT; | |
5076 | memory_full (); | |
5077 | } | |
5078 | ||
5079 | b->text->beg = (unsigned char *) p; | |
5080 | UNBLOCK_INPUT; | |
5081 | } | |
5082 | ||
5083 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5084 | shrink it. */ | |
5085 | ||
5086 | void | |
5371d722 | 5087 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
5088 | { |
5089 | POINTER_TYPE *p; | |
5090 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
5091 | + delta); | |
5092 | BLOCK_INPUT; | |
5093 | #if defined USE_MMAP_FOR_BUFFERS | |
5094 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5095 | #elif defined REL_ALLOC | |
5096 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5097 | #else | |
5098 | p = xrealloc (b->text->beg, nbytes); | |
5099 | #endif | |
177c0ea7 | 5100 | |
b86af064 GM |
5101 | if (p == NULL) |
5102 | { | |
5103 | UNBLOCK_INPUT; | |
5104 | memory_full (); | |
5105 | } | |
5106 | ||
5107 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
5108 | UNBLOCK_INPUT; | |
5109 | } | |
5110 | ||
5111 | ||
5112 | /* Free buffer B's text buffer. */ | |
5113 | ||
5114 | static void | |
5115 | free_buffer_text (b) | |
5116 | struct buffer *b; | |
5117 | { | |
5118 | BLOCK_INPUT; | |
5119 | ||
5120 | #if defined USE_MMAP_FOR_BUFFERS | |
5121 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
5122 | #elif defined REL_ALLOC | |
5123 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
5124 | #else | |
5125 | xfree (b->text->beg); | |
5126 | #endif | |
177c0ea7 | 5127 | |
b86af064 GM |
5128 | BUF_BEG_ADDR (b) = NULL; |
5129 | UNBLOCK_INPUT; | |
5130 | } | |
5131 | ||
5132 | ||
5133 | \f | |
5134 | /*********************************************************************** | |
5135 | Initialization | |
5136 | ***********************************************************************/ | |
5137 | ||
dfcf069d | 5138 | void |
1ab256cb RM |
5139 | init_buffer_once () |
5140 | { | |
7c02e886 GM |
5141 | int idx; |
5142 | ||
5143 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 5144 | |
1ab256cb RM |
5145 | /* Make sure all markable slots in buffer_defaults |
5146 | are initialized reasonably, so mark_buffer won't choke. */ | |
5147 | reset_buffer (&buffer_defaults); | |
13de9290 | 5148 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 5149 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5150 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5151 | /* Prevent GC from getting confused. */ |
5152 | buffer_defaults.text = &buffer_defaults.own_text; | |
5153 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5154 | BUF_INTERVALS (&buffer_defaults) = 0; |
5155 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5156 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5157 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5158 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5159 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5160 | |
5161 | /* Set up the default values of various buffer slots. */ | |
5162 | /* Must do these before making the first buffer! */ | |
5163 | ||
f532dca0 | 5164 | /* real setup is done in bindings.el */ |
d67b4f80 | 5165 | buffer_defaults.mode_line_format = make_pure_c_string ("%-"); |
045dee35 | 5166 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5167 | buffer_defaults.abbrev_mode = Qnil; |
5168 | buffer_defaults.overwrite_mode = Qnil; | |
5169 | buffer_defaults.case_fold_search = Qt; | |
5170 | buffer_defaults.auto_fill_function = Qnil; | |
5171 | buffer_defaults.selective_display = Qnil; | |
5172 | #ifndef old | |
5173 | buffer_defaults.selective_display_ellipses = Qt; | |
5174 | #endif | |
5175 | buffer_defaults.abbrev_table = Qnil; | |
5176 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5177 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5178 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5179 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5180 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5181 | buffer_defaults.overlays_before = NULL; |
5182 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5183 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5184 | |
8d7a4592 | 5185 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb | 5186 | buffer_defaults.truncate_lines = Qnil; |
0858cd02 | 5187 | buffer_defaults.word_wrap = Qnil; |
1ab256cb | 5188 | buffer_defaults.ctl_arrow = Qt; |
3b06f880 | 5189 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 5190 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5191 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5192 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5193 | |
f7975d07 | 5194 | #ifdef DOS_NT |
0776cb1b | 5195 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5196 | #endif |
a1a17b61 | 5197 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5198 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5199 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5200 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5201 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5202 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5203 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5204 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5205 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5206 | buffer_defaults.left_fringe_width = Qnil; | |
5207 | buffer_defaults.right_fringe_width = Qnil; | |
5208 | buffer_defaults.fringes_outside_margins = Qnil; | |
5209 | buffer_defaults.scroll_bar_width = Qnil; | |
5210 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5211 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5212 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5213 | buffer_defaults.fringe_indicator_alist = Qnil; |
5214 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5215 | buffer_defaults.scroll_up_aggressively = Qnil; |
5216 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5217 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5218 | |
5219 | /* Assign the local-flags to the slots that have default values. | |
5220 | The local flag is a bit that is used in the buffer | |
5221 | to say that it has its own local value for the slot. | |
5222 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5223 | ||
5224 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5225 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5226 | |
5227 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5228 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5229 | XSETINT (buffer_local_flags.filename, -1); |
5230 | XSETINT (buffer_local_flags.directory, -1); | |
5231 | XSETINT (buffer_local_flags.backed_up, -1); | |
5232 | XSETINT (buffer_local_flags.save_length, -1); | |
5233 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5234 | XSETINT (buffer_local_flags.read_only, -1); | |
5235 | XSETINT (buffer_local_flags.major_mode, -1); | |
5236 | XSETINT (buffer_local_flags.mode_name, -1); | |
5237 | XSETINT (buffer_local_flags.undo_list, -1); | |
5238 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5239 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5240 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5241 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5242 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5243 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5244 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5245 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5246 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5247 | |
7c02e886 GM |
5248 | idx = 1; |
5249 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5250 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5251 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5252 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5253 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5254 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5255 | #ifndef old |
7c02e886 | 5256 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5257 | #endif |
7c02e886 GM |
5258 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5259 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
0858cd02 | 5260 | XSETFASTINT (buffer_local_flags.word_wrap, idx); ++idx; |
7c02e886 GM |
5261 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; |
5262 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5263 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5264 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5265 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5266 | #ifdef DOS_NT |
7c02e886 | 5267 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5268 | /* Make this one a permanent local. */ |
7c02e886 | 5269 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5270 | #endif |
7c02e886 GM |
5271 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5272 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5273 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5274 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5275 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5276 | /* Make this one a permanent local. */ |
7c02e886 | 5277 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5278 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5279 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5280 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5281 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5282 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5283 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5284 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5285 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5286 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5287 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5288 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5289 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5290 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5291 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5292 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5293 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5294 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5295 | |
5296 | /* Need more room? */ | |
7313acd0 | 5297 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5298 | abort (); |
7313acd0 | 5299 | last_per_buffer_idx = idx; |
177c0ea7 | 5300 | |
1ab256cb RM |
5301 | Vbuffer_alist = Qnil; |
5302 | current_buffer = 0; | |
5303 | all_buffers = 0; | |
5304 | ||
f4265f6c | 5305 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5306 | |
d67b4f80 | 5307 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
1ab256cb RM |
5308 | buffer_defaults.major_mode = Qfundamental_mode; |
5309 | ||
d67b4f80 | 5310 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5311 | |
d67b4f80 | 5312 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5313 | |
d67b4f80 | 5314 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5315 | |
d67b4f80 | 5316 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5317 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5318 | |
d67b4f80 | 5319 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5320 | |
1ab256cb | 5321 | /* super-magic invisible buffer */ |
d67b4f80 | 5322 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5323 | Vbuffer_alist = Qnil; |
5324 | ||
d67b4f80 | 5325 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5326 | |
5327 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5328 | } |
5329 | ||
dfcf069d | 5330 | void |
1ab256cb RM |
5331 | init_buffer () |
5332 | { | |
2381d133 | 5333 | char *pwd; |
136351b7 | 5334 | Lisp_Object temp; |
b639c9be | 5335 | int len; |
1ab256cb | 5336 | |
b86af064 | 5337 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5338 | { |
5339 | /* When using the ralloc implementation based on mmap(2), buffer | |
5340 | text pointers will have been set to null in the dumped Emacs. | |
5341 | Map new memory. */ | |
5342 | struct buffer *b; | |
177c0ea7 | 5343 | |
93c27ef1 GM |
5344 | for (b = all_buffers; b; b = b->next) |
5345 | if (b->text->beg == NULL) | |
b86af064 | 5346 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5347 | } |
b86af064 | 5348 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5349 | |
1ab256cb | 5350 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5351 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5352 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5353 | |
01537133 | 5354 | pwd = get_current_dir_name (); |
a17b5ed1 | 5355 | |
156bdb41 | 5356 | if (!pwd) |
a17b5ed1 | 5357 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5358 | |
1ab256cb RM |
5359 | /* Maybe this should really use some standard subroutine |
5360 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5361 | len = strlen (pwd); |
5362 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5363 | { |
156bdb41 | 5364 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5365 | pwd = (char *) realloc (pwd, len + 2); |
5366 | if (!pwd) | |
5367 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5368 | pwd[len] = DIRECTORY_SEP; |
5369 | pwd[len + 1] = '\0'; | |
f7975d07 | 5370 | } |
0995fa35 | 5371 | |
01537133 | 5372 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5373 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5374 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5375 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5376 | that ENCODE_FILE correctly gets the original bytes. */ |
5377 | current_buffer->directory | |
5378 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5379 | |
0995fa35 RS |
5380 | /* Add /: to the front of the name |
5381 | if it would otherwise be treated as magic. */ | |
5382 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5383 | if (! NILP (temp) |
5384 | /* If the default dir is just /, TEMP is non-nil | |
5385 | because of the ange-ftp completion handler. | |
5386 | However, it is not necessary to turn / into /:/. | |
5387 | So avoid doing that. */ | |
d5db4077 | 5388 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5389 | current_buffer->directory |
5390 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5391 | ||
136351b7 RS |
5392 | temp = get_minibuffer (0); |
5393 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5394 | |
5395 | free (pwd); | |
1ab256cb RM |
5396 | } |
5397 | ||
d6aa1876 SM |
5398 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5399 | Object stored in the current buffer. address is the address of the slot | |
5400 | in the buffer that is current now. */ | |
5401 | ||
5402 | /* TYPE is nil for a general Lisp variable. | |
5403 | An integer specifies a type; then only LIsp values | |
5404 | with that type code are allowed (except that nil is allowed too). | |
5405 | LNAME is the LIsp-level variable name. | |
5406 | VNAME is the name of the buffer slot. | |
5407 | DOC is a dummy where you write the doc string as a comment. */ | |
5408 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ | |
5409 | defvar_per_buffer (lname, vname, type, 0) | |
5410 | ||
5411 | static void | |
5412 | defvar_per_buffer (namestring, address, type, doc) | |
5413 | char *namestring; | |
5414 | Lisp_Object *address; | |
5415 | Lisp_Object type; | |
5416 | char *doc; | |
5417 | { | |
5418 | Lisp_Object sym, val; | |
5419 | int offset; | |
5420 | ||
5421 | sym = intern (namestring); | |
5422 | val = allocate_misc (); | |
5423 | offset = (char *)address - (char *)current_buffer; | |
5424 | ||
5425 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; | |
5426 | XBUFFER_OBJFWD (val)->offset = offset; | |
64e16c3c | 5427 | XBUFFER_OBJFWD (val)->slottype = type; |
d6aa1876 SM |
5428 | SET_SYMBOL_VALUE (sym, val); |
5429 | PER_BUFFER_SYMBOL (offset) = sym; | |
d6aa1876 SM |
5430 | |
5431 | if (PER_BUFFER_IDX (offset) == 0) | |
5432 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5433 | slot of buffer_local_flags */ | |
5434 | abort (); | |
5435 | } | |
5436 | ||
5437 | ||
1ab256cb | 5438 | /* initialize the buffer routines */ |
dfcf069d | 5439 | void |
1ab256cb RM |
5440 | syms_of_buffer () |
5441 | { | |
9115729e KH |
5442 | staticpro (&last_overlay_modification_hooks); |
5443 | last_overlay_modification_hooks | |
5444 | = Fmake_vector (make_number (10), Qnil); | |
5445 | ||
1ab256cb RM |
5446 | staticpro (&Vbuffer_defaults); |
5447 | staticpro (&Vbuffer_local_symbols); | |
5448 | staticpro (&Qfundamental_mode); | |
5449 | staticpro (&Qmode_class); | |
5450 | staticpro (&QSFundamental); | |
5451 | staticpro (&Vbuffer_alist); | |
5452 | staticpro (&Qprotected_field); | |
5453 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5454 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5455 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5456 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5457 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5458 | staticpro (&Qoverlayp); |
d67b4f80 | 5459 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5460 | staticpro (&Qevaporate); |
d67b4f80 | 5461 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5462 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5463 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5464 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5465 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5466 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5467 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5468 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5469 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5470 | staticpro (&Qpriority); |
d67b4f80 | 5471 | Qwindow = intern_c_string ("window"); |
5985d248 | 5472 | staticpro (&Qwindow); |
d67b4f80 | 5473 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5474 | staticpro (&Qbefore_string); |
d67b4f80 | 5475 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5476 | staticpro (&Qafter_string); |
d67b4f80 | 5477 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5478 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5479 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5480 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5481 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5482 | staticpro (&Qafter_change_functions); |
2f7a359d | 5483 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5484 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5485 | |
d67b4f80 | 5486 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5487 | staticpro (&Qkill_buffer_query_functions); |
5488 | ||
1ab256cb | 5489 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5490 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5491 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5492 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb RM |
5493 | |
5494 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5495 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5496 | ||
5497 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5498 | &buffer_defaults.mode_line_format, |
5499 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5500 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5501 | |
045dee35 | 5502 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5503 | &buffer_defaults.header_line_format, |
5504 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5505 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5506 | |
7ee72033 MB |
5507 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5508 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5509 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5510 | |
a3bbced0 | 5511 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5512 | &buffer_defaults.extra_line_spacing, |
5513 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5514 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5515 | |
187ccf49 KS |
5516 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5517 | &buffer_defaults.cursor_in_non_selected_windows, | |
5518 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5519 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5520 | ||
1ab256cb | 5521 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5522 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5523 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5524 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5525 | |
5526 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5527 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5528 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5529 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5530 | |
5e2ad10b JB |
5531 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5532 | &buffer_defaults.direction_reversed, | |
5533 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5534 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5535 | |
5e2ad10b JB |
5536 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5537 | &buffer_defaults.enable_multibyte_characters, | |
5538 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5539 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5540 | |
5e2ad10b JB |
5541 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5542 | &buffer_defaults.buffer_file_coding_system, | |
5543 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5544 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5545 | |
1ab256cb | 5546 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5547 | &buffer_defaults.truncate_lines, |
5548 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5549 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5550 | |
5551 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5552 | &buffer_defaults.fill_column, |
5553 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5554 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5555 | |
5556 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5557 | &buffer_defaults.left_margin, |
5558 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5559 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5560 | |
5561 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5562 | &buffer_defaults.tab_width, |
23625946 | 5563 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5564 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5565 | |
5566 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5567 | &buffer_defaults.case_fold_search, |
5568 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5569 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5570 | |
f7975d07 | 5571 | #ifdef DOS_NT |
177c0ea7 | 5572 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5573 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5574 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5575 | This is the same as (default-value 'buffer-file-type). |
5576 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5577 | #endif |
5578 | ||
0552666b | 5579 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5580 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5581 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5582 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5583 | |
5584 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5585 | &buffer_defaults.right_margin_cols, |
5586 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5587 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5588 | |
2ad8731a KS |
5589 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5590 | &buffer_defaults.left_fringe_width, | |
5591 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5592 | This is the same as (default-value 'left-fringe-width). */); | |
5593 | ||
5594 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5595 | &buffer_defaults.right_fringe_width, | |
5596 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5597 | This is the same as (default-value 'right-fringe-width). */); | |
5598 | ||
5599 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5600 | &buffer_defaults.fringes_outside_margins, | |
5601 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5602 | This is the same as (default-value 'fringes-outside-margins). */); | |
5603 | ||
5604 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5605 | &buffer_defaults.scroll_bar_width, | |
5606 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5607 | This is the same as (default-value 'scroll-bar-width). */); | |
5608 | ||
5609 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5610 | &buffer_defaults.vertical_scroll_bar_type, | |
5611 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5612 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5613 | ||
0552666b | 5614 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5615 | &buffer_defaults.indicate_empty_lines, |
5616 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5617 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5618 | |
6b61353c KH |
5619 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5620 | &buffer_defaults.indicate_buffer_boundaries, | |
5621 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5622 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5623 | ||
c6a46372 KS |
5624 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5625 | &buffer_defaults.fringe_indicator_alist, | |
5626 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5627 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5628 | ||
5629 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5630 | &buffer_defaults.fringe_cursor_alist, | |
5631 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5632 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5633 | ||
0552666b | 5634 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5635 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5636 | doc: /* Default value of `scroll-up-aggressively'. |
5637 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5638 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5639 | |
0552666b | 5640 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5641 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5642 | doc: /* Default value of `scroll-down-aggressively'. |
5643 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5644 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5645 | |
045dee35 | 5646 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5647 | ¤t_buffer->header_line_format, |
7ee72033 | 5648 | Qnil, |
7614d762 RS |
5649 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5650 | The header line appears, optionally, at the top of a window; | |
5651 | the mode line appears at the bottom. */); | |
177c0ea7 | 5652 | |
1ab256cb | 5653 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5654 | Qnil, |
5655 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5656 | Each buffer has its own value of this variable. |
5657 | Value may be nil, a string, a symbol or a list or cons cell. | |
5658 | A value of nil means don't display a mode line. | |
5659 | For a symbol, its value is used (but it is ignored if t or nil). | |
5660 | A string appearing directly as the value of a symbol is processed verbatim | |
5661 | in that the %-constructs below are not recognized. | |
ed463255 | 5662 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5663 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5664 | in the value of that symbol will be ignored. |
018ba359 | 5665 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5666 | is used as a mode line element. Be careful--FORM should not load any files, |
5667 | because that can cause an infinite recursion. | |
ed463255 KS |
5668 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5669 | with the specified properties PROPS applied. | |
018ba359 PJ |
5670 | For a list whose car is a symbol, the symbol's value is taken, |
5671 | and if that is non-nil, the cadr of the list is processed recursively. | |
5672 | Otherwise, the caddr of the list (if there is one) is processed. | |
5673 | For a list whose car is a string or list, each element is processed | |
5674 | recursively and the results are effectively concatenated. | |
5675 | For a list whose car is an integer, the cdr of the list is processed | |
5676 | and padded (if the number is positive) or truncated (if negative) | |
5677 | to the width specified by that number. | |
5678 | A string is printed verbatim in the mode line except for %-constructs: | |
5679 | (%-constructs are allowed when the string is the entire mode-line-format | |
5680 | or when it is found in a cons-cell or a list) | |
5681 | %b -- print buffer name. %f -- print visited file name. | |
5682 | %F -- print frame name. | |
5683 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5684 | %& is like %*, but ignore read-only-ness. | |
5685 | % means buffer is read-only and * means it is modified. | |
5686 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5687 | %s -- print process status. %l -- print the current line number. | |
5688 | %c -- print the current column number (this makes editing slower). | |
5689 | To make the column number update correctly in all cases, | |
5690 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5691 | %i -- print the size of the buffer. |
5692 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5693 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5694 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5695 | or print Bottom or All. | |
018ba359 | 5696 | %n -- print Narrow if appropriate. |
dafbe726 | 5697 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5698 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5699 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5700 | %e -- print error message about full memory. |
f7165034 NR |
5701 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5702 | remote machine. | |
018ba359 PJ |
5703 | %[ -- print one [ for each recursive editing level. %] similar. |
5704 | %% -- print %. %- -- print infinitely many dashes. | |
5705 | Decimal digits after the % specify field width to which to pad. */); | |
5706 | ||
7ee72033 | 5707 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
5a021dd0 | 5708 | doc: /* *Value of `major-mode' for new buffers. */); |
1ab256cb RM |
5709 | |
5710 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5711 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5712 | doc: /* Symbol for current buffer's major mode. |
5713 | The default value (normally `fundamental-mode') affects new buffers. | |
5714 | A value of nil means to use the current buffer's major mode, provided | |
5715 | it is not marked as "special". | |
5716 | ||
5717 | When a mode is used by default, `find-file' switches to it before it | |
5718 | reads the contents into the buffer and before it finishes setting up | |
5719 | the buffer. Thus, the mode and its hooks should not expect certain | |
5720 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5721 | to be set up. */); | |
1ab256cb RM |
5722 | |
5723 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5724 | Qnil, |
64a7c220 | 5725 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5726 | Usually a string, but can use any of the constructs for `mode-line-format', |
5727 | which see. | |
5728 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5729 | |
d6aa1876 SM |
5730 | DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil, |
5731 | doc: /* Local (mode-specific) abbrev table of current buffer. */); | |
5732 | ||
7ee72033 | 5733 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5734 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5735 | |
5736 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5737 | Qnil, |
efc7e75f | 5738 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5739 | |
5740 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
2de9f71c | 5741 | make_number (LISP_INT_TAG), |
1ac5826d | 5742 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5743 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5744 | |
5745 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
2de9f71c | 5746 | make_number (LISP_INT_TAG), |
fc961256 | 5747 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5748 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5749 | |
5750 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
2de9f71c | 5751 | make_number (LISP_INT_TAG), |
efc7e75f | 5752 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5753 | |
7ee72033 | 5754 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5755 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5756 | A value of nil means use backslash and octal digits. |
5757 | This variable does not apply to characters whose display is specified | |
5758 | in the current display table (if there is one). */); | |
1ab256cb | 5759 | |
3b06f880 | 5760 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5761 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5762 | Qnil, |
efc7e75f | 5763 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5764 | Otherwise they are regarded as unibyte. This affects the display, |
5765 | file I/O and the behavior of various editing commands. | |
5766 | ||
5767 | This variable is buffer-local but you cannot set it directly; | |
5768 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5769 | Changing its default value with `setq-default' is supported. | |
5770 | See also variable `default-enable-multibyte-characters' and Info node | |
5771 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5772 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5773 | |
c71b5d9b | 5774 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5775 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5776 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5777 | This variable applies to saving the buffer, and also to `write-region' |
5778 | and other functions that use `write-region'. | |
5779 | It does not apply to sending output to subprocesses, however. | |
5780 | ||
5781 | If this is nil, the buffer is saved without any code conversion | |
5782 | unless some coding system is specified in `file-coding-system-alist' | |
5783 | for the buffer file. | |
5784 | ||
31a6cb06 EZ |
5785 | If the text to be saved cannot be encoded as specified by this variable, |
5786 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5787 | ||
018ba359 PJ |
5788 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5789 | ||
5790 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5791 | |
3b06f880 | 5792 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5793 | Qnil, |
efc7e75f | 5794 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5795 | |
7ee72033 | 5796 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5797 | doc: /* *Non-nil means do not display continuation lines. |
5798 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5799 | |
5800 | Note that this is overridden by the variable | |
5801 | `truncate-partial-width-windows' if that variable is non-nil | |
5802 | and this buffer is not full-frame width. */); | |
1ab256cb | 5803 | |
0858cd02 CY |
5804 | DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer->word_wrap, Qnil, |
5805 | doc: /* *Non-nil means to use word-wrapping for continuation lines. | |
5806 | When word-wrapping is on, continuation lines are wrapped at the space | |
5807 | or tab character nearest to the right window edge. | |
5808 | If nil, continuation lines are wrapped at the right screen edge. | |
5809 | ||
5810 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5811 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5812 | word-wrapping, you might want to reduce the value of | |
5813 | `truncate-partial-width-windows', since wrapping can make text readable | |
5814 | in narrower windows. */); | |
0858cd02 | 5815 | |
f7975d07 | 5816 | #ifdef DOS_NT |
54ad07d3 | 5817 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5818 | Qnil, |
efc7e75f | 5819 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5820 | This variable is meaningful on MS-DOG and Windows NT. |
5821 | On those systems, it is automatically local in every buffer. | |
5822 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5823 | #endif |
5824 | ||
1ab256cb | 5825 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5826 | make_number (Lisp_String), |
efc7e75f | 5827 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5828 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5829 | |
5830 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5831 | Qnil, |
efc7e75f | 5832 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5833 | It is called after self-inserting any character specified in |
5834 | the `auto-fill-chars' table. | |
5835 | NOTE: This variable is not a hook; | |
5836 | its value may not be a list of functions. */); | |
1ab256cb RM |
5837 | |
5838 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5839 | make_number (Lisp_String), |
efc7e75f | 5840 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5841 | |
f6ed2e84 | 5842 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5843 | make_number (Lisp_String), |
efc7e75f | 5844 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5845 | The truename of a file is calculated by `file-truename' |
5846 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5847 | |
1ab256cb | 5848 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5849 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5850 | make_number (Lisp_String), |
7614d762 RS |
5851 | doc: /* Name of file for auto-saving current buffer. |
5852 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5853 | |
7ee72033 | 5854 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5855 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5856 | |
7ee72033 | 5857 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5858 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5859 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5860 | |
5861 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
2de9f71c | 5862 | make_number (LISP_INT_TAG), |
efc7e75f | 5863 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5864 | 0 initially. |
5865 | -1 means auto-saving turned off until next real save. | |
5866 | ||
5867 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5868 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5869 | you probably should set this to -2 in that buffer. */); | |
1ab256cb RM |
5870 | |
5871 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5872 | Qnil, |
7614d762 | 5873 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5874 | An integer N as value means display only lines |
5875 | that start with less than N columns of space. | |
7614d762 RS |
5876 | A value of t means that the character ^M makes itself and |
5877 | all the rest of the line invisible; also, when saving the buffer | |
5878 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5879 | |
5880 | #ifndef old | |
5881 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
d765e3a3 | 5882 | ¤t_buffer->selective_display_ellipses, |
7ee72033 | 5883 | Qnil, |
3f676284 | 5884 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5885 | #endif |
5886 | ||
7ee72033 | 5887 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5888 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5889 | The value should be one of `overwrite-mode-textual', |
5890 | `overwrite-mode-binary', or nil. | |
5891 | If it is `overwrite-mode-textual', self-insertion still | |
5892 | inserts at the end of a line, and inserts when point is before a tab, | |
5893 | until the tab is filled in. | |
5894 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5895 | ||
54939090 | 5896 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5897 | Qnil, |
efc7e75f | 5898 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5899 | |
5900 | If this variable is nil, the value of `standard-display-table' is used. | |
5901 | Each window can have its own, overriding display table, see | |
5902 | `set-window-display-table' and `window-display-table'. | |
5903 | ||
5904 | The display table is a char-table created with `make-display-table'. | |
5905 | A char-table is an array indexed by character codes. Normal array | |
5906 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5907 | ||
5908 | Each of the char-table elements control how to display the corresponding | |
5909 | text character: the element at index C in the table says how to display | |
5910 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5911 | characters or nil. The value nil means display the character in the |
5912 | default fashion; otherwise, the characters from the vector are delivered | |
5913 | to the screen instead of the original character. | |
018ba359 | 5914 | |
5fd11dc8 | 5915 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5916 | to display a capital Y instead of each X character. |
018ba359 PJ |
5917 | |
5918 | In addition, a char-table has six extra slots to control the display of: | |
5919 | ||
5920 | the end of a truncated screen line (extra-slot 0, a single character); | |
5921 | the end of a continued line (extra-slot 1, a single character); | |
5922 | the escape character used to display character codes in octal | |
5923 | (extra-slot 2, a single character); | |
5924 | the character used as an arrow for control characters (extra-slot 3, | |
5925 | a single character); | |
5926 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5927 | a vector of characters); | |
5928 | the character used to draw the border between side-by-side windows | |
5929 | (extra-slot 5, a single character). | |
5930 | ||
5931 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5932 | |
2ad8731a | 5933 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5934 | Qnil, |
efc7e75f | 5935 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5936 | A value of nil means no marginal area. */); |
177c0ea7 | 5937 | |
2ad8731a | 5938 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5939 | Qnil, |
efc7e75f | 5940 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5941 | A value of nil means no marginal area. */); |
177c0ea7 | 5942 | |
2ad8731a KS |
5943 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5944 | Qnil, | |
5945 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5946 | A value of 0 means no left fringe is shown in this buffer's window. | |
5947 | A value of nil means to use the left fringe width from the window's frame. */); | |
5948 | ||
5949 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5950 | Qnil, | |
5951 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5952 | A value of 0 means no right fringe is shown in this buffer's window. | |
5953 | A value of nil means to use the right fringe width from the window's frame. */); | |
5954 | ||
5955 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5956 | Qnil, | |
5957 | doc: /* *Non-nil means to display fringes outside display margins. | |
5958 | A value of nil means to display fringes between margins and buffer text. */); | |
5959 | ||
5960 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5961 | Qnil, | |
5962 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5963 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5964 | ||
5965 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5966 | Qnil, | |
5967 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5968 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5969 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5970 | |
fc2c8887 RS |
5971 | A value of `left' or `right' means put the vertical scroll bar at that side |
5972 | of the window; a value of nil means don't show any vertical scroll bars. | |
5973 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5974 | |
0552666b | 5975 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5976 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5977 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5978 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5979 | window-systems. */); | |
177c0ea7 | 5980 | |
6b61353c KH |
5981 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5982 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5983 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
5984 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5985 | of a window on window-systems with angle bitmaps, or if the window can be | |
5986 | scrolled, the top and bottom line of the window are marked with up and down | |
5987 | arrow bitmaps. | |
b2229037 KS |
5988 | |
5989 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5990 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5991 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5992 | the left fringe but no arrows. |
b2229037 | 5993 | |
79e3497d RS |
5994 | You can exercise more precise control by using an alist as the |
5995 | value. Each alist element (INDICATOR . POSITION) specifies | |
5996 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5997 | `bottom', `up', `down', or t, which specifies the default position, |
5998 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5999 | this indicator. | |
6000 | ||
6001 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
6002 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 6003 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 6004 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 6005 | |
c6a46372 KS |
6006 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
6007 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
6008 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
6009 | The value is an alist where each element (INDICATOR . BITMAPS) | |
6010 | specifies the fringe bitmaps used to display a specific logical | |
6011 | fringe indicator. | |
6012 | ||
6013 | INDICATOR specifies the logical indicator type which is one of the | |
6014 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
6015 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
6016 | ||
6017 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
6018 | the actual bitmap shown in the left or right fringe for the logical | |
6019 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
6020 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
6021 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 6022 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
6023 | symbol which is used in both left and right fringes. */); |
6024 | ||
6025 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
6026 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
6027 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
6028 | The value is an alist where each element (CURSOR . BITMAP) | |
6029 | specifies the fringe bitmaps used to display a specific logical | |
6030 | cursor type in the fringe. | |
6031 | ||
6032 | CURSOR specifies the logical cursor type which is one of the following | |
6033 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
6034 | one is used to show a hollow cursor on narrow lines display lines | |
6035 | where the normal hollow cursor will not fit. | |
6036 | ||
6037 | BITMAP is the corresponding fringe bitmap shown for the logical | |
6038 | cursor type. */); | |
6039 | ||
0552666b | 6040 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 6041 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
6042 | doc: /* How far to scroll windows upward. |
6043 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 6044 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6045 | means scroll to center point. A fraction means scroll to put point |
6046 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
6047 | When the value is 0.0, point goes at the bottom line, which in the |
6048 | simple case that you moved off with C-f means scrolling just one line. | |
6049 | 1.0 means point goes at the top, so that in that simple case, the | |
6050 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6051 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6052 | |
0552666b | 6053 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 6054 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
6055 | doc: /* How far to scroll windows downward. |
6056 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 6057 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6058 | means scroll to center point. A fraction means scroll to put point |
6059 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6060 | When the value is 0.0, point goes at the top line, which in the |
6061 | simple case that you moved off with C-b means scrolling just one line. | |
6062 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6063 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6064 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6065 | |
1ab256cb RM |
6066 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
6067 | "Don't ask."); | |
6068 | */ | |
1ab256cb | 6069 | |
7ee72033 MB |
6070 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
6071 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
6072 | Two arguments are passed to each function: the positions of |
6073 | the beginning and end of the range of old text to be changed. | |
6074 | \(For an insertion, the beginning and end are at the same place.) | |
6075 | No information is given about the length of the text after the change. | |
6076 | ||
6077 | Buffer changes made while executing the `before-change-functions' | |
6078 | don't call any before-change or after-change functions. | |
6079 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
6080 | As a result, a hook function cannot straightforwardly alter the |
6081 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
6082 | accomplishing an equivalent result by using other variables. |
6083 | ||
6084 | If an unhandled error happens in running these functions, | |
6085 | the variable's value remains nil. That prevents the error | |
6086 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6087 | Vbefore_change_functions = Qnil; |
6088 | ||
7ee72033 | 6089 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 6090 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6091 | Three arguments are passed to each function: the positions of |
6092 | the beginning and end of the range of changed text, | |
6093 | and the length in bytes of the pre-change text replaced by that range. | |
6094 | \(For an insertion, the pre-change length is zero; | |
6095 | for a deletion, that length is the number of bytes deleted, | |
6096 | and the post-change beginning and end are at the same place.) | |
6097 | ||
6098 | Buffer changes made while executing the `after-change-functions' | |
6099 | don't call any before-change or after-change functions. | |
6100 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
6101 | As a result, a hook function cannot straightforwardly alter the |
6102 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
6103 | accomplishing an equivalent result by using other variables. |
6104 | ||
6105 | If an unhandled error happens in running these functions, | |
6106 | the variable's value remains nil. That prevents the error | |
6107 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6108 | Vafter_change_functions = Qnil; |
6109 | ||
7ee72033 | 6110 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 6111 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6112 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6113 | Vfirst_change_hook = Qnil; |
1ab256cb | 6114 | |
7ee72033 MB |
6115 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
6116 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
6117 | Recent changes come first; older changes follow newer. |
6118 | ||
6119 | An entry (BEG . END) represents an insertion which begins at | |
6120 | position BEG and ends at position END. | |
6121 | ||
6122 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6123 | from (abs POSITION). If POSITION is positive, point was at the front | |
6124 | of the text being deleted; if negative, point was at the end. | |
6125 | ||
6126 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
6127 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
6128 | of the visited file's modification time, as of that time. If the | |
6129 | modification time of the most recent save is different, this entry is | |
6130 | obsolete. | |
6131 | ||
6132 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6133 | was modified between BEG and END. PROPERTY is the property name, | |
6134 | and VALUE is the old value. | |
6135 | ||
7405f386 KS |
6136 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6137 | \(apply FUN-NAME ARGS). | |
6138 | ||
6139 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6140 | in the active region. BEG and END is the range affected by this entry | |
6141 | and DELTA is the number of bytes added or deleted in that range by | |
6142 | this change. | |
c6c7dc03 | 6143 | |
018ba359 PJ |
6144 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6145 | was adjusted in position by the offset DISTANCE (an integer). | |
6146 | ||
6147 | An entry of the form POSITION indicates that point was at the buffer | |
6148 | location given by the integer. Undoing an entry of this form places | |
6149 | point at POSITION. | |
6150 | ||
b4c4f2f4 JB |
6151 | Entries with value `nil' mark undo boundaries. The undo command treats |
6152 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6153 | |
6154 | If the value of the variable is t, undo information is not recorded. */); | |
6155 | ||
7ee72033 MB |
6156 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
6157 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 6158 | |
7ee72033 MB |
6159 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
6160 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
6161 | |
6162 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6163 | newlines. Columnar operations (like `move-to-column' and |
6164 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6165 | widths as they go. This works well for ordinary text, but if the |
6166 | buffer's lines are very long (say, more than 500 characters), these | |
6167 | motion functions will take longer to execute. Emacs may also take | |
6168 | longer to update the display. | |
6169 | ||
5629f29b | 6170 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6171 | results of their scans, and consult the cache to avoid rescanning |
6172 | regions of the buffer until the text is modified. The caches are most | |
6173 | beneficial when they prevent the most searching---that is, when the | |
6174 | buffer contains long lines and large regions of characters with the | |
6175 | same, fixed screen width. | |
6176 | ||
5629f29b | 6177 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6178 | become slightly slower (because of the overhead of consulting the |
6179 | cache), and the caches will use memory roughly proportional to the | |
6180 | number of newlines and characters whose screen width varies. | |
6181 | ||
6182 | The caches require no explicit maintenance; their accuracy is | |
6183 | maintained internally by the Emacs primitives. Enabling or disabling | |
6184 | the cache should not affect the behavior of any of the motion | |
6185 | functions; it should only affect their performance. */); | |
6186 | ||
7ee72033 MB |
6187 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
6188 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 6189 | |
7ee72033 MB |
6190 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
6191 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 6192 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6193 | set when a file is visited. */); |
be9aafdd | 6194 | |
71ed49fa LT |
6195 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
6196 | ¤t_buffer->auto_save_file_format, Qnil, | |
6197 | doc: /* *Format in which to write auto-save files. | |
6198 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6199 | If it is t, which is the default, auto-save files are written in the | |
6200 | same format as a regular save would use. */); | |
6201 | ||
3cb719bd | 6202 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6203 | ¤t_buffer->invisibility_spec, Qnil, |
6204 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6205 | The default is t, which means that text is invisible |
6206 | if it has a non-nil `invisible' property. | |
6207 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6208 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6209 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6210 | then characters with property value PROP are invisible, | |
6211 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6212 | |
7962a441 | 6213 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6214 | ¤t_buffer->display_count, Qnil, |
6215 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6216 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6217 | |
6218 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6219 | ¤t_buffer->display_time, Qnil, |
6220 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6221 | The function `set-window-buffer' updates this variable |
6222 | to the value obtained by calling `current-time'. | |
6223 | If the buffer has never been shown in a window, the value is nil. */); | |
6224 | ||
7ee72033 | 6225 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
526c9df9 | 6226 | doc: /* */); |
c48f61ef | 6227 | Vtransient_mark_mode = Qnil; |
526c9df9 CY |
6228 | /* The docstring is in simple.el. If we put it here, it would be |
6229 | overwritten when transient-mark-mode is defined using | |
6230 | define-minor-mode. */ | |
c48f61ef | 6231 | |
7ee72033 MB |
6232 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6233 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6234 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6235 | text properties. If the value is a list, disregard `buffer-read-only' | |
6236 | and disregard a `read-only' text property if the property value | |
6237 | is a member of the list. */); | |
a96b68f1 RS |
6238 | Vinhibit_read_only = Qnil; |
6239 | ||
7ee72033 | 6240 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6241 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6242 | Values are interpreted as follows: |
6243 | ||
b8dc613f JB |
6244 | t use the cursor specified for the frame |
6245 | nil don't display a cursor | |
6246 | box display a filled box cursor | |
6247 | hollow display a hollow box cursor | |
6248 | bar display a vertical bar cursor with default width | |
6249 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6250 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6251 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6252 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6253 | |
e08b1705 MR |
6254 | When the buffer is displayed in a non-selected window, the |
6255 | cursor's appearance is instead controlled by the variable | |
6256 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6257 | |
a3bbced0 | 6258 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6259 | ¤t_buffer->extra_line_spacing, Qnil, |
6260 | doc: /* Additional space to put between lines when displaying a buffer. | |
3ba010e5 EZ |
6261 | The space is measured in pixels, and put below lines on graphic displays, |
6262 | see `display-graphic-p'. | |
60ebfdf3 | 6263 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6264 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6265 | |
0124c5bd | 6266 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6267 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6268 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6269 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6270 | |
7ee72033 | 6271 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6272 | doc: /* List of functions called with no args to query before killing a buffer. |
6273 | The buffer being killed will be current while the functions are running. | |
6274 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6275 | Vkill_buffer_query_functions = Qnil; |
6276 | ||
43ed3b8d CY |
6277 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6278 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6279 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6280 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6281 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6282 | staticpro (&Qchange_major_mode_hook); |
6283 | ||
0dc88e60 | 6284 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6285 | defsubr (&Sbuffer_list); |
6286 | defsubr (&Sget_buffer); | |
6287 | defsubr (&Sget_file_buffer); | |
6288 | defsubr (&Sget_buffer_create); | |
336cd056 | 6289 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6290 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6291 | defsubr (&Sbuffer_name); |
6292 | /*defsubr (&Sbuffer_number);*/ | |
6293 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6294 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6295 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6296 | defsubr (&Sbuffer_local_variables); |
6297 | defsubr (&Sbuffer_modified_p); | |
6298 | defsubr (&Sset_buffer_modified_p); | |
6299 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6300 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6301 | defsubr (&Srename_buffer); |
6302 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6303 | defsubr (&Sbuffer_enable_undo); |
6304 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6305 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6306 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6307 | defsubr (&Scurrent_buffer); |
6308 | defsubr (&Sset_buffer); | |
6309 | defsubr (&Sbarf_if_buffer_read_only); | |
6310 | defsubr (&Sbury_buffer); | |
3ac81adb | 6311 | defsubr (&Serase_buffer); |
13cda5f9 | 6312 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6313 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6314 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6315 | |
52f8ec73 | 6316 | defsubr (&Soverlayp); |
2eec3b4e RS |
6317 | defsubr (&Smake_overlay); |
6318 | defsubr (&Sdelete_overlay); | |
6319 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6320 | defsubr (&Soverlay_start); |
6321 | defsubr (&Soverlay_end); | |
6322 | defsubr (&Soverlay_buffer); | |
6323 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6324 | defsubr (&Soverlays_at); |
74514898 | 6325 | defsubr (&Soverlays_in); |
2eec3b4e | 6326 | defsubr (&Snext_overlay_change); |
239c932b | 6327 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6328 | defsubr (&Soverlay_recenter); |
6329 | defsubr (&Soverlay_lists); | |
6330 | defsubr (&Soverlay_get); | |
6331 | defsubr (&Soverlay_put); | |
a8c21b48 | 6332 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6333 | } |
6334 | ||
dfcf069d | 6335 | void |
1ab256cb RM |
6336 | keys_of_buffer () |
6337 | { | |
6338 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6339 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6340 | |
6341 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6342 | initialized when that function gets called. */ | |
d67b4f80 | 6343 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6344 | } |
6b61353c KH |
6345 | |
6346 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6347 | (do not change this comment) */ |