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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, | |
0b5397c2 | 4 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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 | |
dfcf069d AS |
31 | #ifdef HAVE_UNISTD_H |
32 | #include <unistd.h> | |
33 | #endif | |
7ee72033 | 34 | |
1ab256cb | 35 | #include "lisp.h" |
21cf4cf8 | 36 | #include "intervals.h" |
1ab256cb RM |
37 | #include "window.h" |
38 | #include "commands.h" | |
39 | #include "buffer.h" | |
8f348ed5 | 40 | #include "character.h" |
28e969dd | 41 | #include "region-cache.h" |
1ab256cb | 42 | #include "indent.h" |
d014bf88 | 43 | #include "blockinput.h" |
2538fae4 | 44 | #include "keyboard.h" |
e35f6ff7 | 45 | #include "keymap.h" |
08460cd4 | 46 | #include "frame.h" |
1ab256cb RM |
47 | |
48 | struct buffer *current_buffer; /* the current buffer */ | |
49 | ||
50 | /* First buffer in chain of all buffers (in reverse order of creation). | |
51 | Threaded through ->next. */ | |
52 | ||
53 | struct buffer *all_buffers; | |
54 | ||
55 | /* This structure holds the default values of the buffer-local variables | |
56 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
57 | The default value occupies the same slot in this structure | |
58 | as an individual buffer's value occupies in that buffer. | |
59 | Setting the default value also goes through the alist of buffers | |
60 | and stores into each buffer that does not say it has a local value. */ | |
61 | ||
6b61353c | 62 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
63 | |
64 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
65 | ||
66 | static Lisp_Object Vbuffer_defaults; | |
67 | ||
68 | /* This structure marks which slots in a buffer have corresponding | |
69 | default values in buffer_defaults. | |
70 | Each such slot has a nonzero value in this structure. | |
71 | The value has only one nonzero bit. | |
72 | ||
73 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
74 | the entry for that slot (found in the same slot in this structure) |
75 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
76 | |
77 | If a slot in this structure is -1, then even though there may | |
78 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
79 | and the corresponding slot in buffer_defaults is not used. | |
80 | ||
1ab256cb RM |
81 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
82 | zero, that is a bug */ | |
83 | ||
84 | struct buffer buffer_local_flags; | |
85 | ||
86 | /* This structure holds the names of symbols whose values may be | |
87 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
88 | ||
6b61353c KH |
89 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
90 | ||
1ab256cb RM |
91 | /* A Lisp_Object pointer to the above, used for staticpro */ |
92 | static Lisp_Object Vbuffer_local_symbols; | |
93 | ||
ce5b453a SM |
94 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
95 | the buffer structure. */ | |
96 | ||
97 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
98 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
99 | ||
13de9290 RS |
100 | /* Flags indicating which built-in buffer-local variables |
101 | are permanent locals. */ | |
7313acd0 | 102 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
103 | |
104 | /* Number of per-buffer variables used. */ | |
105 | ||
7313acd0 | 106 | int last_per_buffer_idx; |
13de9290 | 107 | |
3709505e | 108 | EXFUN (Fset_buffer, 1); |
f57e2426 J |
109 | void set_buffer_internal (struct buffer *b); |
110 | void set_buffer_internal_1 (struct buffer *b); | |
111 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, | |
112 | int after, Lisp_Object arg1, | |
113 | Lisp_Object arg2, Lisp_Object arg3); | |
114 | static void swap_out_buffer_local_variables (struct buffer *b); | |
115 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
116 | |
117 | /* Alist of all buffer names vs the buffers. */ | |
118 | /* This used to be a variable, but is no longer, | |
119 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
120 | Lisp_Object Vbuffer_alist; | |
121 | ||
122 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
123 | Lisp_Object Vbefore_change_functions; |
124 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 125 | |
c48f61ef RS |
126 | Lisp_Object Vtransient_mark_mode; |
127 | ||
a96b68f1 RS |
128 | /* t means ignore all read-only text properties. |
129 | A list means ignore such a property if its value is a member of the list. | |
130 | Any non-nil value means ignore buffer-read-only. */ | |
131 | Lisp_Object Vinhibit_read_only; | |
132 | ||
dcdffbf6 RS |
133 | /* List of functions to call that can query about killing a buffer. |
134 | If any of these functions returns nil, we don't kill it. */ | |
135 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 136 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 137 | |
43ed3b8d CY |
138 | /* Hook run before changing a major mode. */ |
139 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
140 | ||
dbc4e1c1 JB |
141 | /* List of functions to call before changing an unmodified buffer. */ |
142 | Lisp_Object Vfirst_change_hook; | |
22378665 | 143 | |
dbc4e1c1 | 144 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
145 | Lisp_Object Qbefore_change_functions; |
146 | Lisp_Object Qafter_change_functions; | |
48265e61 | 147 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 148 | |
7775635d KH |
149 | /* If nonzero, all modification hooks are suppressed. */ |
150 | int inhibit_modification_hooks; | |
151 | ||
1ab256cb | 152 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
2f7a359d | 153 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
154 | |
155 | Lisp_Object Qprotected_field; | |
156 | ||
157 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
158 | ||
159 | Lisp_Object Qkill_buffer_hook; | |
160 | ||
5fe0b67e RS |
161 | Lisp_Object Qget_file_buffer; |
162 | ||
52f8ec73 JB |
163 | Lisp_Object Qoverlayp; |
164 | ||
bbbe9545 | 165 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 166 | |
294d215f RS |
167 | Lisp_Object Qmodification_hooks; |
168 | Lisp_Object Qinsert_in_front_hooks; | |
169 | Lisp_Object Qinsert_behind_hooks; | |
170 | ||
f57e2426 J |
171 | static void alloc_buffer_text (struct buffer *, size_t); |
172 | static void free_buffer_text (struct buffer *b); | |
173 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
174 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
175 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 176 | |
f57e2426 | 177 | extern char * emacs_strerror (int); |
b86af064 | 178 | |
1ab256cb RM |
179 | /* For debugging; temporary. See set_buffer_internal. */ |
180 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
181 | ||
01136e9b | 182 | void |
d3da34e0 | 183 | nsberror (Lisp_Object spec) |
1ab256cb | 184 | { |
a7a60ce9 | 185 | if (STRINGP (spec)) |
d5db4077 | 186 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
187 | error ("Invalid buffer argument"); |
188 | } | |
189 | \f | |
0dc88e60 | 190 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
191 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
192 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
193 | (object) | |
0dc88e60 RS |
194 | Lisp_Object object; |
195 | { | |
196 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
197 | ? Qt : Qnil); | |
198 | } | |
199 | ||
08460cd4 | 200 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 201 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
202 | If the optional arg FRAME is a frame, we return the buffer list |
203 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
204 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 205 | (frame) |
08460cd4 | 206 | Lisp_Object frame; |
1ab256cb | 207 | { |
a18b8cb5 | 208 | Lisp_Object general; |
08460cd4 RS |
209 | general = Fmapcar (Qcdr, Vbuffer_alist); |
210 | ||
211 | if (FRAMEP (frame)) | |
212 | { | |
a18b8cb5 KL |
213 | Lisp_Object framelist, prevlist, tail; |
214 | Lisp_Object args[3]; | |
08460cd4 | 215 | |
b7826503 | 216 | CHECK_FRAME (frame); |
08460cd4 RS |
217 | |
218 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 219 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 220 | |
a18b8cb5 KL |
221 | /* Remove from GENERAL any buffer that duplicates one in |
222 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 223 | tail = framelist; |
a18b8cb5 | 224 | while (CONSP (tail)) |
08460cd4 | 225 | { |
7539e11f KR |
226 | general = Fdelq (XCAR (tail), general); |
227 | tail = XCDR (tail); | |
08460cd4 | 228 | } |
a18b8cb5 KL |
229 | tail = prevlist; |
230 | while (CONSP (tail)) | |
231 | { | |
232 | general = Fdelq (XCAR (tail), general); | |
233 | tail = XCDR (tail); | |
234 | } | |
235 | ||
236 | args[0] = framelist; | |
237 | args[1] = general; | |
238 | args[2] = prevlist; | |
239 | return Fnconc (3, args); | |
08460cd4 RS |
240 | } |
241 | ||
242 | return general; | |
1ab256cb RM |
243 | } |
244 | ||
04ae1b48 RS |
245 | /* Like Fassoc, but use Fstring_equal to compare |
246 | (which ignores text properties), | |
247 | and don't ever QUIT. */ | |
248 | ||
249 | static Lisp_Object | |
d3da34e0 | 250 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
251 | { |
252 | register Lisp_Object tail; | |
6d70a280 | 253 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
254 | { |
255 | register Lisp_Object elt, tem; | |
6d70a280 | 256 | elt = XCAR (tail); |
04ae1b48 RS |
257 | tem = Fstring_equal (Fcar (elt), key); |
258 | if (!NILP (tem)) | |
259 | return elt; | |
260 | } | |
261 | return Qnil; | |
262 | } | |
263 | ||
1ab256cb | 264 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
265 | doc: /* Return the buffer named BUFFER-OR-NAME. |
266 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
267 | is a string and there is no buffer with that name, return nil. If | |
268 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
269 | (buffer_or_name) | |
270 | register Lisp_Object buffer_or_name; | |
1ab256cb | 271 | { |
c8804c4f MR |
272 | if (BUFFERP (buffer_or_name)) |
273 | return buffer_or_name; | |
274 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 275 | |
c8804c4f | 276 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
277 | } |
278 | ||
279 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 280 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
281 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
282 | If there is no such live buffer, return nil. | |
7ee72033 MB |
283 | See also `find-buffer-visiting'. */) |
284 | (filename) | |
1ab256cb RM |
285 | register Lisp_Object filename; |
286 | { | |
287 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
288 | Lisp_Object handler; |
289 | ||
b7826503 | 290 | CHECK_STRING (filename); |
1ab256cb RM |
291 | filename = Fexpand_file_name (filename, Qnil); |
292 | ||
5fe0b67e RS |
293 | /* If the file name has special constructs in it, |
294 | call the corresponding file handler. */ | |
a617e913 | 295 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
296 | if (!NILP (handler)) |
297 | return call2 (handler, Qget_file_buffer, filename); | |
298 | ||
7539e11f | 299 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 300 | { |
7539e11f | 301 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
302 | if (!BUFFERP (buf)) continue; |
303 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 304 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 305 | if (!NILP (tem)) |
1ab256cb RM |
306 | return buf; |
307 | } | |
308 | return Qnil; | |
309 | } | |
310 | ||
52e01189 | 311 | Lisp_Object |
d3da34e0 | 312 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
313 | { |
314 | register Lisp_Object tail, buf, tem; | |
315 | ||
7539e11f | 316 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 317 | { |
7539e11f | 318 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
319 | if (!BUFFERP (buf)) continue; |
320 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
321 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
322 | if (!NILP (tem)) | |
323 | return buf; | |
324 | } | |
325 | return Qnil; | |
326 | } | |
327 | ||
1ab256cb RM |
328 | /* Incremented for each buffer created, to assign the buffer number. */ |
329 | int buffer_count; | |
330 | ||
331 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
cd265ca6 MR |
332 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
333 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
334 | return that buffer. If no such buffer exists, create a new buffer with | |
335 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
336 | buffer does not keep undo information. | |
337 | ||
338 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
339 | even if it is dead. The return value is never nil. */) | |
340 | (buffer_or_name) | |
341 | register Lisp_Object buffer_or_name; | |
1ab256cb | 342 | { |
cd265ca6 | 343 | register Lisp_Object buffer, name; |
1ab256cb RM |
344 | register struct buffer *b; |
345 | ||
cd265ca6 MR |
346 | buffer = Fget_buffer (buffer_or_name); |
347 | if (!NILP (buffer)) | |
348 | return buffer; | |
1ab256cb | 349 | |
cd265ca6 | 350 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
351 | error ("Empty string for buffer name is not allowed"); |
352 | ||
cc648cef | 353 | b = allocate_buffer (); |
1ab256cb | 354 | |
336cd056 RS |
355 | /* An ordinary buffer uses its own struct buffer_text. */ |
356 | b->text = &b->own_text; | |
357 | b->base_buffer = 0; | |
358 | ||
1ab256cb | 359 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 360 | BLOCK_INPUT; |
3b06f880 KH |
361 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
362 | anchoring a search. */ | |
b86af064 | 363 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 364 | UNBLOCK_INPUT; |
1ab256cb | 365 | if (! BUF_BEG_ADDR (b)) |
81841847 | 366 | buffer_memory_full (); |
1ab256cb | 367 | |
6d70a280 SM |
368 | BUF_PT (b) = BEG; |
369 | BUF_GPT (b) = BEG; | |
370 | BUF_BEGV (b) = BEG; | |
371 | BUF_ZV (b) = BEG; | |
372 | BUF_Z (b) = BEG; | |
373 | BUF_PT_BYTE (b) = BEG_BYTE; | |
374 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
375 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
376 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
377 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 378 | BUF_MODIFF (b) = 1; |
3e145152 | 379 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 380 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
381 | BUF_SAVE_MODIFF (b) = 1; |
382 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
383 | BUF_UNCHANGED_MODIFIED (b) = 1; |
384 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
385 | BUF_END_UNCHANGED (b) = 0; | |
386 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 387 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 388 | |
28e969dd JB |
389 | b->newline_cache = 0; |
390 | b->width_run_cache = 0; | |
391 | b->width_table = Qnil; | |
b5a225b4 | 392 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 393 | |
1ab256cb RM |
394 | /* Put this on the chain of all buffers including killed ones. */ |
395 | b->next = all_buffers; | |
396 | all_buffers = b; | |
397 | ||
336cd056 RS |
398 | /* An ordinary buffer normally doesn't need markers |
399 | to handle BEGV and ZV. */ | |
400 | b->pt_marker = Qnil; | |
401 | b->begv_marker = Qnil; | |
402 | b->zv_marker = Qnil; | |
04ae1b48 | 403 | |
cd265ca6 | 404 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 405 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 406 | b->name = name; |
04ae1b48 | 407 | |
67ee9f6e | 408 | b->undo_list = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
409 | |
410 | reset_buffer (b); | |
13de9290 | 411 | reset_buffer_local_variables (b, 1); |
1ab256cb | 412 | |
1f57cb74 | 413 | b->mark = Fmake_marker (); |
65745fad | 414 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
415 | b->name = name; |
416 | ||
1ab256cb | 417 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
418 | XSETBUFFER (buffer, b); |
419 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 420 | |
2f064abf | 421 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
422 | can lead to infinite regress until you run out of stack. rms |
423 | says that's not worth protecting against. */ | |
48265e61 | 424 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
425 | /* buffer is on buffer-alist, so no gcpro. */ |
426 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 427 | |
cd265ca6 | 428 | return buffer; |
336cd056 RS |
429 | } |
430 | ||
7e9d5818 | 431 | |
04e4cb3a GM |
432 | /* Return a list of overlays which is a copy of the overlay list |
433 | LIST, but for buffer B. */ | |
434 | ||
2410d73a | 435 | static struct Lisp_Overlay * |
d3da34e0 | 436 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 437 | { |
2410d73a SM |
438 | Lisp_Object buffer; |
439 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
440 | |
441 | XSETBUFFER (buffer, b); | |
442 | ||
2410d73a | 443 | for (; list; list = list->next) |
04e4cb3a GM |
444 | { |
445 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 446 | EMACS_INT charpos; |
04e4cb3a | 447 | |
2410d73a | 448 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
449 | charpos = marker_position (OVERLAY_START (old_overlay)); |
450 | start = Fmake_marker (); | |
db3a49a6 | 451 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
452 | XMARKER (start)->insertion_type |
453 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
454 | ||
455 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
456 | end = Fmake_marker (); | |
db3a49a6 | 457 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
458 | XMARKER (end)->insertion_type |
459 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
460 | ||
461 | overlay = allocate_misc (); | |
462 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
463 | OVERLAY_START (overlay) = start; | |
464 | OVERLAY_END (overlay) = end; | |
465 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 466 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 467 | |
2410d73a SM |
468 | if (tail) |
469 | tail = tail->next = XOVERLAY (overlay); | |
470 | else | |
471 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
472 | } |
473 | ||
2410d73a | 474 | return result; |
04e4cb3a | 475 | } |
177c0ea7 | 476 | |
04e4cb3a | 477 | |
7e9d5818 GM |
478 | /* Clone per-buffer values of buffer FROM. |
479 | ||
480 | Buffer TO gets the same per-buffer values as FROM, with the | |
481 | following exceptions: (1) TO's name is left untouched, (2) markers | |
482 | are copied and made to refer to TO, and (3) overlay lists are | |
483 | copied. */ | |
484 | ||
485 | static void | |
d3da34e0 | 486 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 487 | { |
54622f33 | 488 | Lisp_Object to_buffer; |
7e9d5818 GM |
489 | int offset; |
490 | ||
491 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 492 | |
3ee24aec SM |
493 | /* buffer-local Lisp variables start at `undo_list', |
494 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 495 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
496 | offset < sizeof *to; |
497 | offset += sizeof (Lisp_Object)) | |
498 | { | |
499 | Lisp_Object obj; | |
500 | ||
4b7cdc0e SM |
501 | /* Don't touch the `name' which should be unique for every buffer. */ |
502 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
503 | continue; | |
504 | ||
7e9d5818 | 505 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 506 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
507 | { |
508 | struct Lisp_Marker *m = XMARKER (obj); | |
509 | obj = Fmake_marker (); | |
510 | XMARKER (obj)->insertion_type = m->insertion_type; | |
511 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
512 | } | |
513 | ||
514 | PER_BUFFER_VALUE (to, offset) = obj; | |
515 | } | |
516 | ||
72af86bd | 517 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 518 | |
04e4cb3a GM |
519 | to->overlays_before = copy_overlays (to, from->overlays_before); |
520 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 521 | |
e1688f54 RS |
522 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
523 | and install that in TO. */ | |
524 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
525 | } |
526 | ||
7e9d5818 GM |
527 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
528 | 2, 3, | |
193c3837 | 529 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 530 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 531 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
532 | NAME should be a string which is not the name of an existing buffer. |
533 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
534 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
535 | CLONE nil means the indirect buffer's state is reset to default values. */) |
536 | (base_buffer, name, clone) | |
7e9d5818 | 537 | Lisp_Object base_buffer, name, clone; |
336cd056 | 538 | { |
6b61353c | 539 | Lisp_Object buf, tem; |
7e9d5818 | 540 | struct buffer *b; |
336cd056 | 541 | |
6b61353c | 542 | CHECK_STRING (name); |
336cd056 RS |
543 | buf = Fget_buffer (name); |
544 | if (!NILP (buf)) | |
d5db4077 | 545 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 546 | |
6b61353c | 547 | tem = base_buffer; |
336cd056 RS |
548 | base_buffer = Fget_buffer (base_buffer); |
549 | if (NILP (base_buffer)) | |
6b61353c KH |
550 | error ("No such buffer: `%s'", SDATA (tem)); |
551 | if (NILP (XBUFFER (base_buffer)->name)) | |
552 | error ("Base buffer has been killed"); | |
336cd056 | 553 | |
d5db4077 | 554 | if (SCHARS (name) == 0) |
336cd056 RS |
555 | error ("Empty string for buffer name is not allowed"); |
556 | ||
cc648cef | 557 | b = allocate_buffer (); |
336cd056 | 558 | |
67ee9f6e SM |
559 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
560 | ? XBUFFER (base_buffer)->base_buffer | |
561 | : XBUFFER (base_buffer)); | |
336cd056 RS |
562 | |
563 | /* Use the base buffer's text object. */ | |
564 | b->text = b->base_buffer->text; | |
565 | ||
566 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
567 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
568 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
569 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
570 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
571 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
572 | |
573 | b->newline_cache = 0; | |
574 | b->width_run_cache = 0; | |
575 | b->width_table = Qnil; | |
576 | ||
577 | /* Put this on the chain of all buffers including killed ones. */ | |
578 | b->next = all_buffers; | |
579 | all_buffers = b; | |
580 | ||
581 | name = Fcopy_sequence (name); | |
ab77f05c | 582 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
583 | b->name = name; |
584 | ||
585 | reset_buffer (b); | |
13de9290 | 586 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
587 | |
588 | /* Put this in the alist of all live buffers. */ | |
589 | XSETBUFFER (buf, b); | |
590 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
591 | ||
592 | b->mark = Fmake_marker (); | |
1ab256cb | 593 | b->name = name; |
336cd056 | 594 | |
abc9d959 RS |
595 | /* The multibyte status belongs to the base buffer. */ |
596 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
597 | ||
336cd056 RS |
598 | /* Make sure the base buffer has markers for its narrowing. */ |
599 | if (NILP (b->base_buffer->pt_marker)) | |
600 | { | |
601 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
602 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
603 | BUF_PT (b->base_buffer), | |
604 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
605 | } |
606 | if (NILP (b->base_buffer->begv_marker)) | |
607 | { | |
608 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
609 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
610 | BUF_BEGV (b->base_buffer), | |
611 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
612 | } |
613 | if (NILP (b->base_buffer->zv_marker)) | |
614 | { | |
615 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
616 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
617 | BUF_ZV (b->base_buffer), | |
618 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 619 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
620 | } |
621 | ||
7e9d5818 GM |
622 | if (NILP (clone)) |
623 | { | |
624 | /* Give the indirect buffer markers for its narrowing. */ | |
625 | b->pt_marker = Fmake_marker (); | |
626 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
627 | b->begv_marker = Fmake_marker (); | |
628 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
629 | b->zv_marker = Fmake_marker (); | |
630 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
631 | XMARKER (b->zv_marker)->insertion_type = 1; | |
632 | } | |
633 | else | |
7fa57e45 RS |
634 | { |
635 | struct buffer *old_b = current_buffer; | |
636 | ||
637 | clone_per_buffer_values (b->base_buffer, b); | |
638 | b->filename = Qnil; | |
639 | b->file_truename = Qnil; | |
640 | b->display_count = make_number (0); | |
641 | b->backed_up = Qnil; | |
642 | b->auto_save_file_name = Qnil; | |
643 | set_buffer_internal_1 (b); | |
644 | Fset (intern ("buffer-save-without-query"), Qnil); | |
645 | Fset (intern ("buffer-file-number"), Qnil); | |
646 | Fset (intern ("buffer-stale-function"), Qnil); | |
647 | set_buffer_internal_1 (old_b); | |
648 | } | |
336cd056 | 649 | |
a9ee7a59 | 650 | return buf; |
1ab256cb RM |
651 | } |
652 | ||
d4f5719a | 653 | void |
d3da34e0 | 654 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
655 | { |
656 | Lisp_Object overlay; | |
657 | ||
658 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
659 | have to empty the list, otherwise we end up with overlays that | |
660 | think they belong to this buffer while the buffer doesn't know about | |
661 | them any more. */ | |
662 | while (b->overlays_before) | |
663 | { | |
664 | XSETMISC (overlay, b->overlays_before); | |
665 | Fdelete_overlay (overlay); | |
666 | } | |
667 | while (b->overlays_after) | |
668 | { | |
669 | XSETMISC (overlay, b->overlays_after); | |
670 | Fdelete_overlay (overlay); | |
671 | } | |
672 | eassert (b->overlays_before == NULL); | |
673 | eassert (b->overlays_after == NULL); | |
674 | } | |
675 | ||
bcd40520 | 676 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 677 | and local variables. |
d4f5719a SM |
678 | If called on an already-initialized buffer, the list of overlays |
679 | should be deleted before calling this function, otherwise we end up | |
680 | with overlays that claim to belong to the buffer but the buffer | |
681 | claims it doesn't belong to it. */ | |
1ab256cb RM |
682 | |
683 | void | |
d3da34e0 | 684 | reset_buffer (register struct buffer *b) |
1ab256cb RM |
685 | { |
686 | b->filename = Qnil; | |
f6ed2e84 | 687 | b->file_truename = Qnil; |
1ab256cb RM |
688 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
689 | b->modtime = 0; | |
58b963f7 | 690 | b->modtime_size = -1; |
8d7a4592 | 691 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 692 | b->last_window_start = 1; |
8b264726 | 693 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
694 | b->clip_changed = 0; |
695 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb | 696 | b->backed_up = Qnil; |
0b5397c2 | 697 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 698 | b->auto_save_failure_time = -1; |
1ab256cb RM |
699 | b->auto_save_file_name = Qnil; |
700 | b->read_only = Qnil; | |
2410d73a SM |
701 | b->overlays_before = NULL; |
702 | b->overlays_after = NULL; | |
c2d5b10f | 703 | b->overlay_center = BEG; |
dfda7a7f | 704 | b->mark_active = Qnil; |
943e065b | 705 | b->point_before_scroll = Qnil; |
be9aafdd | 706 | b->file_format = Qnil; |
71ed49fa | 707 | b->auto_save_file_format = Qt; |
0dc6f165 | 708 | b->last_selected_window = Qnil; |
7962a441 | 709 | XSETINT (b->display_count, 0); |
3fd364db | 710 | b->display_time = Qnil; |
1bf08baf | 711 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 712 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 713 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
714 | |
715 | b->display_error_modiff = 0; | |
1ab256cb RM |
716 | } |
717 | ||
bcd40520 RS |
718 | /* Reset buffer B's local variables info. |
719 | Don't use this on a buffer that has already been in use; | |
720 | it does not treat permanent locals consistently. | |
13de9290 RS |
721 | Instead, use Fkill_all_local_variables. |
722 | ||
3709505e | 723 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
724 | buffer-local variables. If PERMANENT_TOO is 0, |
725 | we preserve those. */ | |
bcd40520 | 726 | |
13de9290 | 727 | static void |
d3da34e0 | 728 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
729 | { |
730 | register int offset; | |
7c02e886 | 731 | int i; |
1ab256cb RM |
732 | |
733 | /* Reset the major mode to Fundamental, together with all the | |
734 | things that depend on the major mode. | |
735 | default-major-mode is handled at a higher level. | |
736 | We ignore it here. */ | |
737 | b->major_mode = Qfundamental_mode; | |
738 | b->keymap = Qnil; | |
1ab256cb RM |
739 | b->mode_name = QSFundamental; |
740 | b->minor_modes = Qnil; | |
3446af9c RS |
741 | |
742 | /* If the standard case table has been altered and invalidated, | |
743 | fix up its insides first. */ | |
744 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
745 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
746 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
747 | Fset_standard_case_table (Vascii_downcase_table); | |
748 | ||
1ab256cb | 749 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
750 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
751 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
752 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 753 | b->invisibility_spec = Qt; |
2e716096 RS |
754 | #ifndef DOS_NT |
755 | b->buffer_file_type = Qnil; | |
756 | #endif | |
3cb719bd | 757 | |
13de9290 | 758 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e SM |
759 | if (permanent_too) |
760 | b->local_var_alist = Qnil; | |
761 | else | |
762 | { | |
2f7a359d | 763 | Lisp_Object tmp, prop, last = Qnil; |
3709505e | 764 | for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 765 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
766 | { |
767 | /* If permanent-local, keep it. */ | |
768 | last = tmp; | |
769 | if (EQ (prop, Qpermanent_local_hook)) | |
770 | { | |
771 | /* This is a partially permanent hook variable. | |
772 | Preserve only the elements that want to be preserved. */ | |
773 | Lisp_Object list, newlist; | |
774 | list = XCDR (XCAR (tmp)); | |
775 | if (!CONSP (list)) | |
776 | newlist = list; | |
777 | else | |
778 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
779 | { | |
780 | Lisp_Object elt = XCAR (list); | |
781 | /* Preserve element ELT if it's t, | |
782 | if it is a function with a `permanent-local-hook' property, | |
783 | or if it's not a symbol. */ | |
784 | if (! SYMBOLP (elt) | |
785 | || EQ (elt, Qt) | |
786 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
787 | newlist = Fcons (elt, newlist); | |
788 | } | |
789 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
790 | } | |
791 | } | |
792 | /* Delete this local variable. */ | |
3709505e SM |
793 | else if (NILP (last)) |
794 | b->local_var_alist = XCDR (tmp); | |
795 | else | |
796 | XSETCDR (last, XCDR (tmp)); | |
797 | } | |
798 | ||
7313acd0 | 799 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 800 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 801 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
802 | |
803 | /* For each slot that has a default value, | |
804 | copy that into the slot. */ | |
805 | ||
3ee24aec SM |
806 | /* buffer-local Lisp variables start at `undo_list', |
807 | tho only the ones from `name' on are GC'd normally. */ | |
808 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
809 | offset < sizeof *b; |
810 | offset += sizeof (Lisp_Object)) | |
aab80822 | 811 | { |
7313acd0 | 812 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
813 | if ((idx > 0 |
814 | && (permanent_too | |
ce5b453a | 815 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 816 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 817 | } |
1ab256cb RM |
818 | } |
819 | ||
01050cb5 RM |
820 | /* We split this away from generate-new-buffer, because rename-buffer |
821 | and set-visited-file-name ought to be able to use this to really | |
822 | rename the buffer properly. */ | |
823 | ||
824 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 825 | 1, 2, 0, |
7ee72033 | 826 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
827 | If there is no live buffer named NAME, then return NAME. |
828 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 829 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
830 | Optional second argument IGNORE specifies a name that is okay to use (if |
831 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
7ee72033 | 832 | (name, ignore) |
c273e647 | 833 | register Lisp_Object name, ignore; |
1ab256cb RM |
834 | { |
835 | register Lisp_Object gentemp, tem; | |
836 | int count; | |
837 | char number[10]; | |
838 | ||
b7826503 | 839 | CHECK_STRING (name); |
1ab256cb | 840 | |
6b61353c KH |
841 | tem = Fstring_equal (name, ignore); |
842 | if (!NILP (tem)) | |
843 | return name; | |
1ab256cb | 844 | tem = Fget_buffer (name); |
265a9e55 | 845 | if (NILP (tem)) |
01050cb5 | 846 | return name; |
1ab256cb RM |
847 | |
848 | count = 1; | |
849 | while (1) | |
850 | { | |
851 | sprintf (number, "<%d>", ++count); | |
852 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 853 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
854 | if (!NILP (tem)) |
855 | return gentemp; | |
1ab256cb | 856 | tem = Fget_buffer (gentemp); |
265a9e55 | 857 | if (NILP (tem)) |
01050cb5 | 858 | return gentemp; |
1ab256cb RM |
859 | } |
860 | } | |
861 | ||
862 | \f | |
863 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 | 864 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
865 | BUFFER defaults to the current buffer. |
866 | Return nil if BUFFER has been killed. */) | |
7ee72033 | 867 | (buffer) |
1ab256cb RM |
868 | register Lisp_Object buffer; |
869 | { | |
265a9e55 | 870 | if (NILP (buffer)) |
1ab256cb | 871 | return current_buffer->name; |
b7826503 | 872 | CHECK_BUFFER (buffer); |
1ab256cb RM |
873 | return XBUFFER (buffer)->name; |
874 | } | |
875 | ||
876 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
877 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
878 | No argument or nil as argument means use the current buffer. */) | |
879 | (buffer) | |
1ab256cb RM |
880 | register Lisp_Object buffer; |
881 | { | |
265a9e55 | 882 | if (NILP (buffer)) |
1ab256cb | 883 | return current_buffer->filename; |
b7826503 | 884 | CHECK_BUFFER (buffer); |
1ab256cb RM |
885 | return XBUFFER (buffer)->filename; |
886 | } | |
887 | ||
336cd056 RS |
888 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
889 | 0, 1, 0, | |
7ee72033 | 890 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
891 | If BUFFER is not indirect, return nil. |
892 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 893 | (buffer) |
336cd056 RS |
894 | register Lisp_Object buffer; |
895 | { | |
896 | struct buffer *base; | |
897 | Lisp_Object base_buffer; | |
898 | ||
899 | if (NILP (buffer)) | |
900 | base = current_buffer->base_buffer; | |
901 | else | |
902 | { | |
b7826503 | 903 | CHECK_BUFFER (buffer); |
336cd056 RS |
904 | base = XBUFFER (buffer)->base_buffer; |
905 | } | |
906 | ||
907 | if (! base) | |
908 | return Qnil; | |
909 | XSETBUFFER (base_buffer, base); | |
910 | return base_buffer; | |
911 | } | |
912 | ||
79aa712d | 913 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 914 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
915 | doc: /* Return the value of VARIABLE in BUFFER. |
916 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
917 | is the default binding of the variable. */) |
918 | (variable, buffer) | |
919 | register Lisp_Object variable; | |
79aa712d RS |
920 | register Lisp_Object buffer; |
921 | { | |
922 | register struct buffer *buf; | |
923 | register Lisp_Object result; | |
ad97b375 | 924 | struct Lisp_Symbol *sym; |
79aa712d | 925 | |
5e2ad10b | 926 | CHECK_SYMBOL (variable); |
ae69175b | 927 | CHECK_BUFFER (buffer); |
79aa712d | 928 | buf = XBUFFER (buffer); |
ce5b453a | 929 | sym = XSYMBOL (variable); |
79aa712d | 930 | |
ce5b453a SM |
931 | start: |
932 | switch (sym->redirect) | |
f0bac7de | 933 | { |
ce5b453a SM |
934 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
935 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
936 | case SYMBOL_LOCALIZED: | |
937 | { /* Look in local_var_alist. */ | |
938 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
939 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
940 | result = Fassoc (variable, buf->local_var_alist); | |
941 | if (!NILP (result)) | |
942 | { | |
943 | if (blv->fwd) | |
944 | { /* What binding is loaded right now? */ | |
945 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 946 | |
ce5b453a SM |
947 | /* The value of the currently loaded binding is not |
948 | stored in it, but rather in the realvalue slot. | |
949 | Store that value into the binding it belongs to | |
950 | in case that is the one we are about to use. */ | |
f0bac7de | 951 | |
ce5b453a SM |
952 | XSETCDR (current_alist_element, |
953 | do_symval_forwarding (blv->fwd)); | |
954 | } | |
955 | /* Now get the (perhaps updated) value out of the binding. */ | |
956 | result = XCDR (result); | |
957 | } | |
958 | else | |
959 | result = Fdefault_value (variable); | |
960 | break; | |
961 | } | |
962 | case SYMBOL_FORWARDED: | |
963 | { | |
964 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
965 | if (BUFFER_OBJFWDP (fwd)) | |
966 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
967 | else | |
968 | result = Fdefault_value (variable); | |
969 | break; | |
970 | } | |
971 | default: abort (); | |
f0bac7de | 972 | } |
79aa712d | 973 | |
4c4dc0b0 KS |
974 | if (!EQ (result, Qunbound)) |
975 | return result; | |
79aa712d | 976 | |
4c4dc0b0 | 977 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
978 | } |
979 | ||
e1688f54 | 980 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 981 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
982 | in special slots in the buffer object. */ |
983 | ||
984 | static Lisp_Object | |
d3da34e0 | 985 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
986 | { |
987 | Lisp_Object result = Qnil; | |
988 | register Lisp_Object tail; | |
989 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
990 | { | |
991 | Lisp_Object val, elt; | |
992 | ||
993 | elt = XCAR (tail); | |
994 | ||
995 | /* Reference each variable in the alist in buf. | |
996 | If inquiring about the current buffer, this gets the current values, | |
997 | so store them into the alist so the alist is up to date. | |
998 | If inquiring about some other buffer, this swaps out any values | |
999 | for that buffer, making the alist up to date automatically. */ | |
1000 | val = find_symbol_value (XCAR (elt)); | |
1001 | /* Use the current buffer value only if buf is the current buffer. */ | |
1002 | if (buf != current_buffer) | |
1003 | val = XCDR (elt); | |
1004 | ||
ce5b453a | 1005 | result = Fcons (Fcons (XCAR (elt), val), result); |
e1688f54 RS |
1006 | } |
1007 | ||
1008 | return result; | |
1009 | } | |
1010 | ||
1ab256cb | 1011 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1012 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1013 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1014 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1015 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1016 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
1017 | No argument or nil as argument means use current buffer as BUFFER. */) |
1018 | (buffer) | |
1ab256cb RM |
1019 | register Lisp_Object buffer; |
1020 | { | |
1021 | register struct buffer *buf; | |
553defa4 | 1022 | register Lisp_Object result; |
1ab256cb | 1023 | |
265a9e55 | 1024 | if (NILP (buffer)) |
1ab256cb RM |
1025 | buf = current_buffer; |
1026 | else | |
1027 | { | |
b7826503 | 1028 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1029 | buf = XBUFFER (buffer); |
1030 | } | |
1031 | ||
e1688f54 | 1032 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1033 | |
1ab256cb RM |
1034 | /* Add on all the variables stored in special slots. */ |
1035 | { | |
7c02e886 | 1036 | int offset, idx; |
1ab256cb | 1037 | |
3ee24aec SM |
1038 | /* buffer-local Lisp variables start at `undo_list', |
1039 | tho only the ones from `name' on are GC'd normally. */ | |
1040 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1041 | offset < sizeof (struct buffer); |
7c02e886 GM |
1042 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1043 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1044 | { |
7313acd0 GM |
1045 | idx = PER_BUFFER_IDX (offset); |
1046 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1047 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1048 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1049 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1050 | result); |
1ab256cb RM |
1051 | } |
1052 | } | |
553defa4 RS |
1053 | |
1054 | return result; | |
1ab256cb | 1055 | } |
1ab256cb RM |
1056 | \f |
1057 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1058 | 0, 1, 0, |
7ee72033 MB |
1059 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1060 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1061 | (buffer) | |
1ab256cb RM |
1062 | register Lisp_Object buffer; |
1063 | { | |
1064 | register struct buffer *buf; | |
265a9e55 | 1065 | if (NILP (buffer)) |
1ab256cb RM |
1066 | buf = current_buffer; |
1067 | else | |
1068 | { | |
b7826503 | 1069 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1070 | buf = XBUFFER (buffer); |
1071 | } | |
1072 | ||
336cd056 | 1073 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1074 | } |
1075 | ||
1076 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1077 | 1, 1, 0, |
7ee72033 MB |
1078 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1079 | A non-nil FLAG means mark the buffer modified. */) | |
1080 | (flag) | |
1ab256cb RM |
1081 | register Lisp_Object flag; |
1082 | { | |
1083 | register int already; | |
1084 | register Lisp_Object fn; | |
8ec01c70 | 1085 | Lisp_Object buffer, window; |
1ab256cb RM |
1086 | |
1087 | #ifdef CLASH_DETECTION | |
1088 | /* If buffer becoming modified, lock the file. | |
1089 | If buffer becoming unmodified, unlock the file. */ | |
1090 | ||
60f4dd23 | 1091 | fn = current_buffer->file_truename; |
90d456d2 KH |
1092 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1093 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1094 | { |
336cd056 | 1095 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1096 | if (!already && !NILP (flag)) |
1ab256cb | 1097 | lock_file (fn); |
265a9e55 | 1098 | else if (already && NILP (flag)) |
1ab256cb RM |
1099 | unlock_file (fn); |
1100 | } | |
1101 | #endif /* CLASH_DETECTION */ | |
1102 | ||
0b5397c2 SM |
1103 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1104 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1105 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1106 | modify SAVE_MODIFF to affect one, we may affect the other | |
1107 | as well. | |
1108 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1109 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1110 | recent-auto-save-p from t to nil. | |
1111 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1112 | we risk changing recent-auto-save-p from nil to t. */ | |
1113 | SAVE_MODIFF = (NILP (flag) | |
1114 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1115 | ? MODIFF | |
1116 | /* Let's try to preserve recent-auto-save-p. */ | |
1117 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1118 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1119 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1120 | or increase MODIFF. */ | |
1121 | : MODIFF++); | |
177c0ea7 | 1122 | |
8ec01c70 GM |
1123 | /* Set update_mode_lines only if buffer is displayed in some window. |
1124 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1125 | state by recording/restoring the state around blocks of code. | |
1126 | Setting update_mode_lines makes redisplay consider all windows | |
1127 | (on all frames). Stealth fontification of buffers not displayed | |
1128 | would incur additional redisplay costs if we'd set | |
1129 | update_modes_lines unconditionally. | |
1130 | ||
1131 | Ideally, I think there should be another mechanism for fontifying | |
1132 | buffers without "modifying" buffers, or redisplay should be | |
1133 | smarter about updating the `*' in mode lines. --gerd */ | |
1134 | XSETBUFFER (buffer, current_buffer); | |
1135 | window = Fget_buffer_window (buffer, Qt); | |
1136 | if (WINDOWP (window)) | |
d57b83b3 GM |
1137 | { |
1138 | ++update_mode_lines; | |
1139 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1140 | } | |
177c0ea7 | 1141 | |
1ab256cb RM |
1142 | return flag; |
1143 | } | |
1144 | ||
a8c21b48 GM |
1145 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1146 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1147 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1148 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1149 | state of the current buffer. Use with care. */) |
1150 | (flag) | |
a8c21b48 GM |
1151 | Lisp_Object flag; |
1152 | { | |
1153 | #ifdef CLASH_DETECTION | |
1154 | Lisp_Object fn; | |
177c0ea7 | 1155 | |
a8c21b48 GM |
1156 | /* If buffer becoming modified, lock the file. |
1157 | If buffer becoming unmodified, unlock the file. */ | |
1158 | ||
1159 | fn = current_buffer->file_truename; | |
1160 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1161 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1162 | { | |
1163 | int already = SAVE_MODIFF < MODIFF; | |
1164 | if (!already && !NILP (flag)) | |
1165 | lock_file (fn); | |
1166 | else if (already && NILP (flag)) | |
1167 | unlock_file (fn); | |
1168 | } | |
1169 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1170 | |
a8c21b48 GM |
1171 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1172 | return flag; | |
1173 | } | |
1174 | ||
1ab256cb | 1175 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1176 | 0, 1, 0, |
7ee72033 | 1177 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1178 | Each buffer has a tick counter which is incremented each time the |
1179 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1180 | No argument or nil as argument means use current buffer as BUFFER. */) |
1181 | (buffer) | |
1ab256cb RM |
1182 | register Lisp_Object buffer; |
1183 | { | |
1184 | register struct buffer *buf; | |
265a9e55 | 1185 | if (NILP (buffer)) |
1ab256cb RM |
1186 | buf = current_buffer; |
1187 | else | |
1188 | { | |
b7826503 | 1189 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1190 | buf = XBUFFER (buffer); |
1191 | } | |
1192 | ||
1193 | return make_number (BUF_MODIFF (buf)); | |
1194 | } | |
3e145152 CY |
1195 | |
1196 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1197 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1198 | doc: /* Return BUFFER's character-change tick counter. | |
1199 | Each buffer has a character-change tick counter, which is set to the | |
1200 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1201 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1202 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1203 | you can tell whether a character change occurred in that buffer in |
1204 | between these calls. No argument or nil as argument means use current | |
1205 | buffer as BUFFER. */) | |
1206 | (buffer) | |
1207 | register Lisp_Object buffer; | |
1208 | { | |
1209 | register struct buffer *buf; | |
1210 | if (NILP (buffer)) | |
1211 | buf = current_buffer; | |
1212 | else | |
1213 | { | |
1214 | CHECK_BUFFER (buffer); | |
1215 | buf = XBUFFER (buffer); | |
1216 | } | |
1217 | ||
1218 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1219 | } | |
1ab256cb | 1220 | \f |
01050cb5 | 1221 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1222 | "(list (read-string \"Rename buffer (to new name): \" \ |
1223 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1224 | current-prefix-arg)", | |
7ee72033 | 1225 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1226 | If second arg UNIQUE is nil or omitted, it is an error if a |
1227 | buffer named NEWNAME already exists. | |
1228 | If UNIQUE is non-nil, come up with a new name using | |
1229 | `generate-new-buffer-name'. | |
1230 | Interactively, you can set UNIQUE with a prefix argument. | |
1231 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1232 | This does not change the name of the visited file (if any). */) |
1233 | (newname, unique) | |
489c043a | 1234 | register Lisp_Object newname, unique; |
1ab256cb RM |
1235 | { |
1236 | register Lisp_Object tem, buf; | |
1237 | ||
b7826503 | 1238 | CHECK_STRING (newname); |
d59698c4 | 1239 | |
d5db4077 | 1240 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1241 | error ("Empty string is invalid as a buffer name"); |
1242 | ||
489c043a | 1243 | tem = Fget_buffer (newname); |
265a9e55 | 1244 | if (!NILP (tem)) |
01050cb5 | 1245 | { |
8801a864 KR |
1246 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1247 | rename the buffer automatically so you can create another | |
1248 | with the original name. It makes UNIQUE equivalent to | |
1249 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1250 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1251 | return current_buffer->name; | |
3bd779aa | 1252 | if (!NILP (unique)) |
489c043a | 1253 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1254 | else |
d5db4077 | 1255 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1256 | } |
1ab256cb | 1257 | |
489c043a | 1258 | current_buffer->name = newname; |
76f590d7 JB |
1259 | |
1260 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1261 | any windows displaying current_buffer will stay unchanged. */ | |
1262 | update_mode_lines++; | |
1263 | ||
67180c6a | 1264 | XSETBUFFER (buf, current_buffer); |
489c043a | 1265 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1266 | if (NILP (current_buffer->filename) |
1267 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1268 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1269 | /* Refetch since that last call may have done GC. */ |
1270 | return current_buffer->name; | |
1ab256cb RM |
1271 | } |
1272 | ||
773fbdb9 | 1273 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1274 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1275 | Buffers not visible in windows are preferred to visible buffers, |
1276 | unless optional second argument VISIBLE-OK is non-nil. | |
1277 | If the optional third argument FRAME is non-nil, use that frame's | |
1278 | buffer list instead of the selected frame's buffer list. | |
1279 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1280 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1281 | (buffer, visible_ok, frame) | |
773fbdb9 | 1282 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1283 | { |
d3da34e0 | 1284 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
7962a441 | 1285 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1286 | notsogood = Qnil; |
1287 | ||
773fbdb9 | 1288 | if (NILP (frame)) |
9ba9623d | 1289 | frame = selected_frame; |
773fbdb9 | 1290 | |
d234d13e JL |
1291 | CHECK_FRAME (frame); |
1292 | ||
7962a441 | 1293 | tail = Vbuffer_alist; |
773fbdb9 | 1294 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1295 | |
1296 | /* Consider buffers that have been seen in the selected frame | |
1297 | before other buffers. */ | |
177c0ea7 | 1298 | |
773fbdb9 | 1299 | tem = frame_buffer_list (frame); |
7962a441 RS |
1300 | add_ons = Qnil; |
1301 | while (CONSP (tem)) | |
1302 | { | |
7539e11f KR |
1303 | if (BUFFERP (XCAR (tem))) |
1304 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1305 | tem = XCDR (tem); | |
7962a441 RS |
1306 | } |
1307 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1308 | ||
6d70a280 | 1309 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1310 | { |
6d70a280 | 1311 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1312 | if (EQ (buf, buffer)) |
1313 | continue; | |
6b61353c KH |
1314 | if (NILP (buf)) |
1315 | continue; | |
1316 | if (NILP (XBUFFER (buf)->name)) | |
1317 | continue; | |
10ceceb8 | 1318 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1319 | continue; |
04ae1b48 RS |
1320 | /* If the selected frame has a buffer_predicate, |
1321 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1322 | if (!NILP (pred)) |
04ae1b48 | 1323 | { |
7962a441 | 1324 | tem = call1 (pred, buf); |
04ae1b48 RS |
1325 | if (NILP (tem)) |
1326 | continue; | |
1327 | } | |
04ae1b48 | 1328 | |
a0ebb746 | 1329 | if (NILP (visible_ok)) |
66ffe51c | 1330 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1331 | else |
1332 | tem = Qnil; | |
265a9e55 | 1333 | if (NILP (tem)) |
1ab256cb | 1334 | return buf; |
265a9e55 | 1335 | if (NILP (notsogood)) |
1ab256cb RM |
1336 | notsogood = buf; |
1337 | } | |
265a9e55 | 1338 | if (!NILP (notsogood)) |
1ab256cb | 1339 | return notsogood; |
dba1a30a GM |
1340 | buf = Fget_buffer (build_string ("*scratch*")); |
1341 | if (NILP (buf)) | |
1342 | { | |
1343 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1344 | Fset_buffer_major_mode (buf); | |
1345 | } | |
89132f25 | 1346 | return buf; |
1ab256cb RM |
1347 | } |
1348 | \f | |
1ab256cb RM |
1349 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1350 | 0, 1, "", | |
7ee72033 MB |
1351 | doc: /* Start keeping undo information for buffer BUFFER. |
1352 | No argument or nil as argument means do this for the current buffer. */) | |
1353 | (buffer) | |
ffd56f97 | 1354 | register Lisp_Object buffer; |
1ab256cb | 1355 | { |
ffd56f97 | 1356 | Lisp_Object real_buffer; |
1ab256cb | 1357 | |
ffd56f97 | 1358 | if (NILP (buffer)) |
67180c6a | 1359 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1360 | else |
1361 | { | |
ffd56f97 JB |
1362 | real_buffer = Fget_buffer (buffer); |
1363 | if (NILP (real_buffer)) | |
1364 | nsberror (buffer); | |
1ab256cb RM |
1365 | } |
1366 | ||
ffd56f97 JB |
1367 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1368 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1369 | |
1370 | return Qnil; | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1375 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1376 | The buffer being killed will be current while the hook is running.\n\ | |
1377 | See `kill-buffer'." | |
1378 | */ | |
c8804c4f MR |
1379 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
1380 | doc: /* Kill buffer BUFFER-OR-NAME. | |
1381 | The argument may be a buffer or the name of an existing buffer. | |
1382 | Argument nil or omitted means kill the current buffer. Return t if the | |
1383 | buffer is actually killed, nil otherwise. | |
1384 | ||
1385 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1386 | windows currently displaying the buffer to be killed. The functions in | |
1387 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1388 | the current buffer. If any of them returns nil, the buffer is not | |
1389 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1390 | actually killed. The buffer being killed will be current while the hook | |
1391 | is running. | |
018ba359 PJ |
1392 | |
1393 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1394 | with SIGHUP. */) |
c8804c4f MR |
1395 | (buffer_or_name) |
1396 | Lisp_Object buffer_or_name; | |
1ab256cb | 1397 | { |
c8804c4f | 1398 | Lisp_Object buffer; |
1ab256cb RM |
1399 | register struct buffer *b; |
1400 | register Lisp_Object tem; | |
1401 | register struct Lisp_Marker *m; | |
6af718a4 | 1402 | struct gcpro gcpro1; |
1ab256cb | 1403 | |
c8804c4f MR |
1404 | if (NILP (buffer_or_name)) |
1405 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1406 | else |
c8804c4f MR |
1407 | buffer = Fget_buffer (buffer_or_name); |
1408 | if (NILP (buffer)) | |
1409 | nsberror (buffer_or_name); | |
1ab256cb | 1410 | |
c8804c4f | 1411 | b = XBUFFER (buffer); |
1ab256cb | 1412 | |
4a4a9db5 KH |
1413 | /* Avoid trouble for buffer already dead. */ |
1414 | if (NILP (b->name)) | |
1415 | return Qnil; | |
1416 | ||
1ab256cb | 1417 | /* Query if the buffer is still modified. */ |
265a9e55 | 1418 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1419 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1420 | { |
c8804c4f | 1421 | GCPRO1 (buffer); |
5c4930b0 RS |
1422 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1423 | b->name, make_number (0))); | |
1ab256cb | 1424 | UNGCPRO; |
265a9e55 | 1425 | if (NILP (tem)) |
1ab256cb RM |
1426 | return Qnil; |
1427 | } | |
1428 | ||
dcdffbf6 | 1429 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1430 | { |
aed13378 | 1431 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1432 | Lisp_Object arglist[1]; |
1ab256cb RM |
1433 | |
1434 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1435 | set_buffer_internal (b); | |
dcdffbf6 RS |
1436 | |
1437 | /* First run the query functions; if any query is answered no, | |
1438 | don't kill the buffer. */ | |
5b20caf0 | 1439 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1440 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1441 | if (NILP (tem)) | |
5b20caf0 | 1442 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1443 | |
1444 | /* Then run the hooks. */ | |
f1597a3a | 1445 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1446 | unbind_to (count, Qnil); |
1447 | } | |
1448 | ||
1449 | /* We have no more questions to ask. Verify that it is valid | |
1450 | to kill the buffer. This must be done after the questions | |
1451 | since anything can happen within do_yes_or_no_p. */ | |
1452 | ||
1453 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1454 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1455 | return Qnil; |
1456 | ||
265a9e55 | 1457 | if (NILP (b->name)) |
1ab256cb RM |
1458 | return Qnil; |
1459 | ||
336cd056 RS |
1460 | /* When we kill a base buffer, kill all its indirect buffers. |
1461 | We do it at this stage so nothing terrible happens if they | |
1462 | ask questions or their hooks get errors. */ | |
1463 | if (! b->base_buffer) | |
1464 | { | |
1465 | struct buffer *other; | |
1466 | ||
c8804c4f | 1467 | GCPRO1 (buffer); |
336cd056 RS |
1468 | |
1469 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1470 | /* all_buffers contains dead buffers too; |
1471 | don't re-kill them. */ | |
1472 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 | 1473 | { |
c8804c4f MR |
1474 | Lisp_Object buffer; |
1475 | XSETBUFFER (buffer, other); | |
1476 | Fkill_buffer (buffer); | |
336cd056 RS |
1477 | } |
1478 | ||
1479 | UNGCPRO; | |
1480 | } | |
177c0ea7 | 1481 | |
1ab256cb RM |
1482 | /* Make this buffer not be current. |
1483 | In the process, notice if this is the sole visible buffer | |
1484 | and give up if so. */ | |
1485 | if (b == current_buffer) | |
1486 | { | |
c8804c4f | 1487 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1488 | Fset_buffer (tem); |
1489 | if (b == current_buffer) | |
1490 | return Qnil; | |
1491 | } | |
1492 | ||
77270fac GM |
1493 | /* Notice if the buffer to kill is the sole visible buffer |
1494 | when we're currently in the mini-buffer, and give up if so. */ | |
1495 | XSETBUFFER (tem, current_buffer); | |
1496 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1497 | { | |
c8804c4f MR |
1498 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1499 | if (EQ (buffer, tem)) | |
77270fac GM |
1500 | return Qnil; |
1501 | } | |
1502 | ||
1ab256cb RM |
1503 | /* Now there is no question: we can kill the buffer. */ |
1504 | ||
1505 | #ifdef CLASH_DETECTION | |
1506 | /* Unlock this buffer's file, if it is locked. */ | |
1507 | unlock_buffer (b); | |
1508 | #endif /* CLASH_DETECTION */ | |
1509 | ||
c8804c4f MR |
1510 | GCPRO1 (buffer); |
1511 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1512 | UNGCPRO; |
1513 | ||
1514 | /* Killing buffer processes may run sentinels which may | |
1515 | have called kill-buffer. */ | |
1516 | ||
1517 | if (NILP (b->name)) | |
1518 | return Qnil; | |
1519 | ||
b93fb365 | 1520 | clear_charpos_cache (b); |
1ab256cb RM |
1521 | |
1522 | tem = Vinhibit_quit; | |
1523 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1524 | replace_buffer_in_all_windows (buffer); |
1525 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1526 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1527 | Vinhibit_quit = tem; |
1528 | ||
9cf712eb RS |
1529 | /* Delete any auto-save file, if we saved it in this session. |
1530 | But not if the buffer is modified. */ | |
a7a60ce9 | 1531 | if (STRINGP (b->auto_save_file_name) |
0b5397c2 SM |
1532 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1533 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1534 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1535 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1536 | { |
1537 | Lisp_Object tem; | |
1538 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1539 | if (! NILP (tem)) |
f1a5d776 | 1540 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1541 | } |
1542 | ||
4a4a9db5 KH |
1543 | if (b->base_buffer) |
1544 | { | |
1545 | /* Unchain all markers that belong to this indirect buffer. | |
1546 | Don't unchain the markers that belong to the base buffer | |
1547 | or its other indirect buffers. */ | |
65745fad | 1548 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1549 | { |
65745fad | 1550 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1551 | if (m->buffer == b) |
65745fad SM |
1552 | unchain_marker (m); |
1553 | m = next; | |
4a4a9db5 KH |
1554 | } |
1555 | } | |
1556 | else | |
1ab256cb | 1557 | { |
4a4a9db5 | 1558 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1559 | and leave them pointing nowhere. */ |
65745fad | 1560 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1561 | { |
65745fad | 1562 | struct Lisp_Marker *next = m->next; |
336cd056 | 1563 | m->buffer = 0; |
65745fad SM |
1564 | m->next = NULL; |
1565 | m = next; | |
336cd056 | 1566 | } |
65745fad | 1567 | BUF_MARKERS (b) = NULL; |
336cd056 | 1568 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1569 | |
1570 | /* Perhaps we should explicitly free the interval tree here... */ | |
1571 | } | |
33f7013e | 1572 | |
2f3f993b RS |
1573 | /* Reset the local variables, so that this buffer's local values |
1574 | won't be protected from GC. They would be protected | |
1575 | if they happened to remain encached in their symbols. | |
1576 | This gets rid of them for certain. */ | |
1577 | swap_out_buffer_local_variables (b); | |
13de9290 | 1578 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1579 | |
1ab256cb | 1580 | b->name = Qnil; |
336cd056 | 1581 | |
9ac0d9e0 | 1582 | BLOCK_INPUT; |
336cd056 | 1583 | if (! b->base_buffer) |
b86af064 | 1584 | free_buffer_text (b); |
336cd056 | 1585 | |
28e969dd JB |
1586 | if (b->newline_cache) |
1587 | { | |
1588 | free_region_cache (b->newline_cache); | |
1589 | b->newline_cache = 0; | |
1590 | } | |
1591 | if (b->width_run_cache) | |
1592 | { | |
1593 | free_region_cache (b->width_run_cache); | |
1594 | b->width_run_cache = 0; | |
1595 | } | |
1596 | b->width_table = Qnil; | |
9ac0d9e0 | 1597 | UNBLOCK_INPUT; |
1ab256cb RM |
1598 | b->undo_list = Qnil; |
1599 | ||
1600 | return Qt; | |
1601 | } | |
1602 | \f | |
36a8c287 JB |
1603 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1604 | we do this each time BUF is selected visibly, the more recently | |
1605 | selected buffers are always closer to the front of the list. This | |
1606 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1607 | |
01136e9b | 1608 | void |
d3da34e0 | 1609 | record_buffer (Lisp_Object buf) |
1ab256cb RM |
1610 | { |
1611 | register Lisp_Object link, prev; | |
773fbdb9 | 1612 | Lisp_Object frame; |
9ba9623d | 1613 | frame = selected_frame; |
1ab256cb RM |
1614 | |
1615 | prev = Qnil; | |
7539e11f | 1616 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1617 | { |
7539e11f | 1618 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1619 | break; |
1620 | prev = link; | |
1621 | } | |
1622 | ||
36a8c287 JB |
1623 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1624 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1625 | |
265a9e55 | 1626 | if (NILP (prev)) |
7539e11f | 1627 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1628 | else |
f3fbd155 | 1629 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1630 | |
f3fbd155 | 1631 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1632 | Vbuffer_alist = link; |
7962a441 | 1633 | |
a18b8cb5 | 1634 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1635 | |
a18b8cb5 KL |
1636 | prev = Qnil; |
1637 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1638 | link = XCDR (link)) | |
1639 | { | |
1640 | if (EQ (XCAR (link), buf)) | |
1641 | { | |
1642 | if (NILP (prev)) | |
1643 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1644 | else | |
1645 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1646 | break; | |
1647 | } | |
1648 | prev = link; | |
1649 | } | |
1650 | ||
7962a441 RS |
1651 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1652 | ||
1653 | prev = Qnil; | |
773fbdb9 | 1654 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1655 | link = XCDR (link)) |
7962a441 | 1656 | { |
7539e11f | 1657 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1658 | break; |
1659 | prev = link; | |
1660 | } | |
1661 | ||
1662 | /* Effectively do delq. */ | |
1663 | ||
1664 | if (CONSP (link)) | |
1665 | { | |
1666 | if (NILP (prev)) | |
773fbdb9 | 1667 | set_frame_buffer_list (frame, |
7539e11f | 1668 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1669 | else |
f3fbd155 | 1670 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1671 | |
f3fbd155 | 1672 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1673 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1674 | } |
1675 | else | |
773fbdb9 | 1676 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1677 | } |
1678 | ||
a9ee7a59 | 1679 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1680 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1681 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1682 | according to `default-major-mode'. |
018ba359 | 1683 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1684 | the current buffer's major mode. */) |
1685 | (buffer) | |
a2428fa2 | 1686 | Lisp_Object buffer; |
a9ee7a59 KH |
1687 | { |
1688 | int count; | |
1689 | Lisp_Object function; | |
1690 | ||
ea4fddd8 JB |
1691 | CHECK_BUFFER (buffer); |
1692 | ||
71a0f2c6 | 1693 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1694 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1695 | function = find_symbol_value (intern ("initial-major-mode")); |
1696 | else | |
1697 | { | |
1698 | function = buffer_defaults.major_mode; | |
1699 | if (NILP (function) | |
1700 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1701 | function = current_buffer->major_mode; | |
1702 | } | |
177c0ea7 | 1703 | |
48265e61 DL |
1704 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1705 | return Qnil; | |
1706 | ||
aed13378 | 1707 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1708 | |
48265e61 DL |
1709 | /* To select a nonfundamental mode, |
1710 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1711 | |
1712 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1713 | ||
a2428fa2 | 1714 | Fset_buffer (buffer); |
48265e61 | 1715 | call0 (function); |
a9ee7a59 KH |
1716 | |
1717 | return unbind_to (count, Qnil); | |
1718 | } | |
1719 | ||
2594e0fd RS |
1720 | /* Switch to buffer BUFFER in the selected window. |
1721 | If NORECORD is non-nil, don't call record_buffer. */ | |
1722 | ||
1723 | Lisp_Object | |
d3da34e0 | 1724 | switch_to_buffer_1 (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1725 | { |
c8804c4f | 1726 | register Lisp_Object buffer; |
1ab256cb | 1727 | |
c8804c4f MR |
1728 | if (NILP (buffer_or_name)) |
1729 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1730 | else |
a9ee7a59 | 1731 | { |
c8804c4f MR |
1732 | buffer = Fget_buffer (buffer_or_name); |
1733 | if (NILP (buffer)) | |
a9ee7a59 | 1734 | { |
c8804c4f MR |
1735 | buffer = Fget_buffer_create (buffer_or_name); |
1736 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1737 | } |
1738 | } | |
c8804c4f | 1739 | Fset_buffer (buffer); |
265a9e55 | 1740 | if (NILP (norecord)) |
c8804c4f | 1741 | record_buffer (buffer); |
1ab256cb RM |
1742 | |
1743 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1744 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1745 | : selected_window, | |
c8804c4f | 1746 | buffer, Qnil); |
1ab256cb | 1747 | |
c8804c4f | 1748 | return buffer; |
1ab256cb RM |
1749 | } |
1750 | ||
88970542 JL |
1751 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1752 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1753 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1754 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1755 | nil. Return the buffer switched to. | |
a6dced2a | 1756 | |
ee50ff07 MR |
1757 | If BUFFER-OR-NAME is a string and does not identify an existing |
1758 | buffer, create a new buffer with that name. Interactively, if | |
1759 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1760 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1761 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1762 | |
ee50ff07 MR |
1763 | Optional second arg NORECORD non-nil means do not put this buffer |
1764 | at the front of the list of recently selected ones. This | |
1765 | function returns the buffer it switched to as a Lisp object. | |
1766 | ||
1767 | If the selected window is the minibuffer window or dedicated to | |
1768 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1769 | |
1770 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1771 | within a Lisp program! Use `set-buffer' instead. That avoids |
1772 | messing with the window-buffer correspondences. */) | |
c8804c4f MR |
1773 | (buffer_or_name, norecord) |
1774 | Lisp_Object buffer_or_name, norecord; | |
2594e0fd | 1775 | { |
c8804c4f | 1776 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1777 | { |
611ac521 RS |
1778 | /* Basically a NOP. Avoid signalling an error in the case where |
1779 | the selected window is dedicated, or a minibuffer. */ | |
1780 | ||
c8804c4f MR |
1781 | /* But do put this buffer at the front of the buffer list, unless |
1782 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1783 | at the front of the main buffer-list already, we still want to | |
1784 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1785 | if (NILP (norecord)) |
c8804c4f MR |
1786 | record_buffer (buffer_or_name); |
1787 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1788 | } |
61313fa3 SM |
1789 | else if (EQ (minibuf_window, selected_window) |
1790 | /* If `dedicated' is neither nil nor t, it means it's | |
1791 | dedicatedness can be overridden by an explicit request | |
1792 | such as a call to switch-to-buffer. */ | |
1793 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1794 | /* We can't use the selected window so let `pop-to-buffer' try some |
1795 | other window. */ | |
1796 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1797 | else | |
1798 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1799 | } |
1800 | ||
1ab256cb | 1801 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 MB |
1802 | doc: /* Return the current buffer as a Lisp object. */) |
1803 | () | |
1ab256cb RM |
1804 | { |
1805 | register Lisp_Object buf; | |
67180c6a | 1806 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1807 | return buf; |
1808 | } | |
1809 | \f | |
7ec44ec6 GM |
1810 | /* Set the current buffer to B. |
1811 | ||
1812 | We previously set windows_or_buffers_changed here to invalidate | |
1813 | global unchanged information in beg_unchanged and end_unchanged. | |
1814 | This is no longer necessary because we now compute unchanged | |
1815 | information on a buffer-basis. Every action affecting other | |
1816 | windows than the selected one requires a select_window at some | |
1817 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1818 | |
1819 | void | |
d3da34e0 | 1820 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1821 | { |
b5a225b4 | 1822 | if (current_buffer != b) |
7ec44ec6 | 1823 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1824 | } |
1825 | ||
1826 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1827 | This is used by redisplay. */ | |
1828 | ||
1829 | void | |
d3da34e0 | 1830 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1831 | { |
1832 | register struct buffer *old_buf; | |
ce5b453a | 1833 | register Lisp_Object tail; |
c7aa5005 | 1834 | |
b86af064 | 1835 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1836 | if (b->text->beg == NULL) |
b86af064 GM |
1837 | enlarge_buffer_text (b, 0); |
1838 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1839 | |
c7aa5005 KH |
1840 | if (current_buffer == b) |
1841 | return; | |
1842 | ||
1ab256cb RM |
1843 | old_buf = current_buffer; |
1844 | current_buffer = b; | |
1845 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1846 | ||
336cd056 RS |
1847 | if (old_buf) |
1848 | { | |
1849 | /* Put the undo list back in the base buffer, so that it appears | |
1850 | that an indirect buffer shares the undo list of its base. */ | |
1851 | if (old_buf->base_buffer) | |
1852 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1853 | ||
1854 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1855 | when it is not current, update them now. */ | |
1856 | if (! NILP (old_buf->pt_marker)) | |
1857 | { | |
1858 | Lisp_Object obuf; | |
1859 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1860 | set_marker_both (old_buf->pt_marker, obuf, |
1861 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1862 | } |
1863 | if (! NILP (old_buf->begv_marker)) | |
1864 | { | |
1865 | Lisp_Object obuf; | |
1866 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1867 | set_marker_both (old_buf->begv_marker, obuf, |
1868 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1869 | } |
1870 | if (! NILP (old_buf->zv_marker)) | |
1871 | { | |
1872 | Lisp_Object obuf; | |
1873 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1874 | set_marker_both (old_buf->zv_marker, obuf, |
1875 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1876 | } |
1877 | } | |
1878 | ||
1879 | /* Get the undo list from the base buffer, so that it appears | |
1880 | that an indirect buffer shares the undo list of its base. */ | |
1881 | if (b->base_buffer) | |
1882 | b->undo_list = b->base_buffer->undo_list; | |
1883 | ||
1884 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1885 | when it is not current, fetch them now. */ | |
1886 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1887 | { |
1888 | BUF_PT (b) = marker_position (b->pt_marker); | |
1889 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1890 | } | |
336cd056 | 1891 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1892 | { |
1893 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1894 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1895 | } | |
336cd056 | 1896 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1897 | { |
1898 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1899 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1900 | } | |
336cd056 | 1901 | |
1ab256cb RM |
1902 | /* Look down buffer's list of local Lisp variables |
1903 | to find and update any that forward into C variables. */ | |
1904 | ||
ce5b453a | 1905 | do |
1ab256cb | 1906 | { |
ce5b453a SM |
1907 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1908 | { | |
1909 | Lisp_Object var = XCAR (XCAR (tail)); | |
1910 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1911 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1912 | && SYMBOL_BLV (sym)->fwd) | |
1913 | /* Just reference the variable | |
1914 | to cause it to become set for this buffer. */ | |
1915 | Fsymbol_value (var); | |
1916 | } | |
1ab256cb | 1917 | } |
1ab256cb | 1918 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1919 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1920 | } |
1921 | ||
336cd056 | 1922 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1923 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1924 | |
1925 | void | |
d3da34e0 | 1926 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1927 | { |
1928 | register struct buffer *old_buf; | |
1929 | ||
1930 | if (current_buffer == b) | |
1931 | return; | |
1932 | ||
1933 | old_buf = current_buffer; | |
1934 | current_buffer = b; | |
1935 | ||
1936 | if (old_buf) | |
1937 | { | |
1938 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1939 | when it is not current, update them now. */ | |
1940 | if (! NILP (old_buf->pt_marker)) | |
1941 | { | |
1942 | Lisp_Object obuf; | |
1943 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1944 | set_marker_both (old_buf->pt_marker, obuf, |
1945 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1946 | } |
1947 | if (! NILP (old_buf->begv_marker)) | |
1948 | { | |
1949 | Lisp_Object obuf; | |
1950 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1951 | set_marker_both (old_buf->begv_marker, obuf, |
1952 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1953 | } |
1954 | if (! NILP (old_buf->zv_marker)) | |
1955 | { | |
1956 | Lisp_Object obuf; | |
1957 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1958 | set_marker_both (old_buf->zv_marker, obuf, |
1959 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1960 | } |
1961 | } | |
1962 | ||
1963 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1964 | when it is not current, fetch them now. */ | |
1965 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1966 | { |
1967 | BUF_PT (b) = marker_position (b->pt_marker); | |
1968 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1969 | } | |
336cd056 | 1970 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1971 | { |
1972 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1973 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1974 | } | |
336cd056 | 1975 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1976 | { |
1977 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1978 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1979 | } | |
336cd056 RS |
1980 | } |
1981 | ||
1ab256cb | 1982 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1983 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1984 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1985 | also `save-excursion' when you want to make a buffer current | |
1986 | temporarily. This function does not display the buffer, so its effect | |
1987 | ends when the current command terminates. Use `switch-to-buffer' or | |
1988 | `pop-to-buffer' to switch buffers permanently. */) | |
1989 | (buffer_or_name) | |
1990 | register Lisp_Object buffer_or_name; | |
1ab256cb | 1991 | { |
c8804c4f MR |
1992 | register Lisp_Object buffer; |
1993 | buffer = Fget_buffer (buffer_or_name); | |
1994 | if (NILP (buffer)) | |
1995 | nsberror (buffer_or_name); | |
1996 | if (NILP (XBUFFER (buffer)->name)) | |
1ab256cb | 1997 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1998 | set_buffer_internal (XBUFFER (buffer)); |
1999 | return buffer; | |
1ab256cb | 2000 | } |
d0628b06 RS |
2001 | |
2002 | /* Set the current buffer to BUFFER provided it is alive. */ | |
2003 | ||
2004 | Lisp_Object | |
d3da34e0 | 2005 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 RS |
2006 | { |
2007 | if (! NILP (XBUFFER (buffer)->name)) | |
2008 | Fset_buffer (buffer); | |
2009 | return Qnil; | |
2010 | } | |
1ab256cb RM |
2011 | \f |
2012 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
2013 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
2014 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
2015 | () | |
1ab256cb | 2016 | { |
a96b68f1 RS |
2017 | if (!NILP (current_buffer->read_only) |
2018 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2019 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2020 | return Qnil; |
2021 | } | |
2022 | ||
2023 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 2024 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 2025 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
2026 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
2027 | default. | |
2028 | ||
2029 | The argument may be a buffer name or an actual buffer object. If | |
2030 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
2031 | from the selected window if it is displayed there. If the selected |
2032 | window is dedicated to its buffer, delete that window if there are other | |
2033 | windows on the same frame. If the selected window is the only window on | |
2034 | its frame, iconify that frame. */) | |
c8804c4f MR |
2035 | (buffer_or_name) |
2036 | register Lisp_Object buffer_or_name; | |
1ab256cb | 2037 | { |
c8804c4f MR |
2038 | Lisp_Object buffer; |
2039 | ||
b271272a | 2040 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 2041 | if (NILP (buffer_or_name)) |
a5611885 | 2042 | { |
c58dab63 | 2043 | Lisp_Object tem; |
a2428fa2 | 2044 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2045 | |
c58dab63 | 2046 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2047 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2048 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2049 | { |
2050 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2051 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2052 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2053 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2054 | else | |
2055 | Fdelete_window (selected_window); | |
2056 | } | |
a5611885 | 2057 | } |
1ab256cb RM |
2058 | else |
2059 | { | |
c8804c4f MR |
2060 | buffer = Fget_buffer (buffer_or_name); |
2061 | if (NILP (buffer)) | |
2062 | nsberror (buffer_or_name); | |
b271272a JB |
2063 | } |
2064 | ||
a1a8b28e GM |
2065 | /* Move buffer to the end of the buffer list. Do nothing if the |
2066 | buffer is killed. */ | |
2067 | if (!NILP (XBUFFER (buffer)->name)) | |
2068 | { | |
2069 | Lisp_Object aelt, link; | |
b271272a | 2070 | |
a1a8b28e GM |
2071 | aelt = Frassq (buffer, Vbuffer_alist); |
2072 | link = Fmemq (aelt, Vbuffer_alist); | |
2073 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2074 | XSETCDR (link, Qnil); |
a1a8b28e | 2075 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2076 | |
a18b8cb5 KL |
2077 | XFRAME (selected_frame)->buffer_list |
2078 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2079 | XFRAME (selected_frame)->buried_buffer_list | |
2080 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2081 | } |
dec989eb | 2082 | |
1ab256cb RM |
2083 | return Qnil; |
2084 | } | |
2085 | \f | |
c922bc55 | 2086 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2087 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2088 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2089 | so the buffer is truly empty after this. */) |
2090 | () | |
1ab256cb RM |
2091 | { |
2092 | Fwiden (); | |
c0d9a0c3 GM |
2093 | |
2094 | del_range (BEG, Z); | |
c280bc6a | 2095 | |
1ab256cb RM |
2096 | current_buffer->last_window_start = 1; |
2097 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2098 | if future size is less than past size. Use of erase-buffer | |
2099 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2100 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2101 | return Qnil; |
2102 | } | |
2103 | ||
01136e9b | 2104 | void |
d3da34e0 | 2105 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2106 | { |
b7826503 PJ |
2107 | CHECK_NUMBER_COERCE_MARKER (*b); |
2108 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2109 | |
2110 | if (XINT (*b) > XINT (*e)) | |
2111 | { | |
03192067 KH |
2112 | Lisp_Object tem; |
2113 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2114 | } |
2115 | ||
2116 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2117 | && XINT (*e) <= ZV)) | |
2118 | args_out_of_range (*b, *e); | |
2119 | } | |
2120 | \f | |
b05525fa RS |
2121 | /* Advance BYTE_POS up to a character boundary |
2122 | and return the adjusted position. */ | |
2123 | ||
2124 | static int | |
d3da34e0 | 2125 | advance_to_char_boundary (int byte_pos) |
b05525fa | 2126 | { |
f8449323 | 2127 | int c; |
b05525fa | 2128 | |
f8449323 RS |
2129 | if (byte_pos == BEG) |
2130 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2131 | return BEG; |
f8449323 RS |
2132 | |
2133 | c = FETCH_BYTE (byte_pos); | |
2134 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2135 | { |
1be6387d | 2136 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2137 | multibyte sequence. */ |
a9bcded1 KH |
2138 | int orig_byte_pos = byte_pos; |
2139 | ||
2140 | do | |
2141 | { | |
2142 | byte_pos--; | |
2143 | c = FETCH_BYTE (byte_pos); | |
2144 | } | |
2145 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2146 | INC_POS (byte_pos); |
a9bcded1 KH |
2147 | if (byte_pos < orig_byte_pos) |
2148 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2149 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2150 | surely advance to the correct character boundary. If C is | |
2151 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2152 | } |
2153 | ||
20773569 | 2154 | return byte_pos; |
b05525fa RS |
2155 | } |
2156 | ||
baae5c2d | 2157 | #ifdef REL_ALLOC |
f57e2426 | 2158 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2159 | #endif /* REL_ALLOC */ |
2160 | ||
13cda5f9 SM |
2161 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2162 | 1, 1, 0, | |
2163 | doc: /* Swap the text between current buffer and BUFFER. */) | |
2164 | (buffer) | |
2165 | Lisp_Object buffer; | |
2166 | { | |
2167 | struct buffer *other_buffer; | |
2168 | CHECK_BUFFER (buffer); | |
2169 | other_buffer = XBUFFER (buffer); | |
2170 | ||
dc9cc574 | 2171 | if (NILP (other_buffer->name)) |
409f2919 | 2172 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2173 | |
13cda5f9 SM |
2174 | /* Actually, it probably works just fine. |
2175 | * if (other_buffer == current_buffer) | |
2176 | * error ("Cannot swap a buffer's text with itself"); */ | |
2177 | ||
2178 | /* Actually, this may be workable as well, tho probably only if they're | |
2179 | *both* indirect. */ | |
2180 | if (other_buffer->base_buffer | |
2181 | || current_buffer->base_buffer) | |
2182 | error ("Cannot swap indirect buffers's text"); | |
2183 | ||
2184 | { /* This is probably harder to make work. */ | |
2185 | struct buffer *other; | |
2186 | for (other = all_buffers; other; other = other->next) | |
2187 | if (other->base_buffer == other_buffer | |
2188 | || other->base_buffer == current_buffer) | |
2189 | error ("One of the buffers to swap has indirect buffers"); | |
2190 | } | |
2191 | ||
2192 | #define swapfield(field, type) \ | |
2193 | do { \ | |
2194 | type tmp##field = other_buffer->field; \ | |
2195 | other_buffer->field = current_buffer->field; \ | |
2196 | current_buffer->field = tmp##field; \ | |
2197 | } while (0) | |
2198 | ||
2199 | swapfield (own_text, struct buffer_text); | |
2200 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2201 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2202 | #ifdef REL_ALLOC |
40b615d6 JR |
2203 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2204 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2205 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2206 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2207 | #endif /* REL_ALLOC */ |
2208 | ||
13cda5f9 SM |
2209 | swapfield (pt, EMACS_INT); |
2210 | swapfield (pt_byte, EMACS_INT); | |
2211 | swapfield (begv, EMACS_INT); | |
2212 | swapfield (begv_byte, EMACS_INT); | |
2213 | swapfield (zv, EMACS_INT); | |
2214 | swapfield (zv_byte, EMACS_INT); | |
2215 | eassert (!current_buffer->base_buffer); | |
2216 | eassert (!other_buffer->base_buffer); | |
2217 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2218 | swapfield (newline_cache, struct region_cache *); | |
2219 | swapfield (width_run_cache, struct region_cache *); | |
2220 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2221 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2222 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2223 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2224 | swapfield (overlay_center, EMACS_INT); | |
2225 | swapfield (undo_list, Lisp_Object); | |
2226 | swapfield (mark, Lisp_Object); | |
13cda5f9 | 2227 | swapfield (enable_multibyte_characters, Lisp_Object); |
bc5a45f3 EZ |
2228 | swapfield (bidi_display_reordering, Lisp_Object); |
2229 | swapfield (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2230 | /* FIXME: Not sure what we should do with these *_marker fields. |
2231 | Hopefully they're just nil anyway. */ | |
2232 | swapfield (pt_marker, Lisp_Object); | |
2233 | swapfield (begv_marker, Lisp_Object); | |
2234 | swapfield (zv_marker, Lisp_Object); | |
2235 | current_buffer->point_before_scroll = Qnil; | |
2236 | other_buffer->point_before_scroll = Qnil; | |
2237 | ||
2238 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2239 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2240 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2241 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2242 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2243 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2244 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2245 | { |
2246 | struct Lisp_Marker *m; | |
2247 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2248 | if (m->buffer == other_buffer) | |
2249 | m->buffer = current_buffer; | |
b8ff72fa SM |
2250 | else |
2251 | /* Since there's no indirect buffer in sight, markers on | |
2252 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2253 | eassert (!m->buffer); | |
13cda5f9 SM |
2254 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2255 | if (m->buffer == current_buffer) | |
2256 | m->buffer = other_buffer; | |
b8ff72fa SM |
2257 | else |
2258 | /* Since there's no indirect buffer in sight, markers on | |
2259 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2260 | eassert (!m->buffer); | |
13cda5f9 | 2261 | } |
126f1fc1 SM |
2262 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2263 | So since we just swapped the markers between the two buffers, we need | |
2264 | to undo the effect of this swap for window markers. */ | |
2265 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2266 | Lisp_Object buf1, buf2; | |
2267 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2268 | ||
2269 | while (NILP (Fmemq (w, ws))) | |
2270 | { | |
2271 | ws = Fcons (w, ws); | |
2272 | if (MARKERP (XWINDOW (w)->pointm) | |
2273 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2274 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2275 | Fset_marker (XWINDOW (w)->pointm, | |
2276 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2277 | XWINDOW (w)->buffer); | |
2278 | w = Fnext_window (w, Qt, Qt); | |
2279 | } | |
2280 | } | |
2281 | ||
13cda5f9 SM |
2282 | if (current_buffer->text->intervals) |
2283 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2284 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2285 | if (other_buffer->text->intervals) | |
2286 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2287 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2288 | ||
2289 | return Qnil; | |
2290 | } | |
2291 | ||
3ac81adb RS |
2292 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2293 | 1, 1, 0, | |
7ee72033 | 2294 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2295 | If FLAG is t, this makes the buffer a multibyte buffer. |
2296 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2297 | In these cases, the buffer contents remain unchanged as a sequence of |
2298 | bytes but the contents viewed as characters do change. | |
2299 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2300 | all eight-bit bytes to eight-bit characters. |
2301 | If the multibyte flag was really changed, undo information of the | |
2302 | current buffer is cleared. */) | |
7ee72033 | 2303 | (flag) |
3ac81adb RS |
2304 | Lisp_Object flag; |
2305 | { | |
65745fad | 2306 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2307 | struct buffer *other; |
458c8af4 | 2308 | int begv, zv; |
8d1203ea | 2309 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2310 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2311 | Lisp_Object old_undo = current_buffer->undo_list; |
2312 | struct gcpro gcpro1; | |
3ac81adb | 2313 | |
6e553d5e RS |
2314 | if (current_buffer->base_buffer) |
2315 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2316 | ||
70e77119 AS |
2317 | /* Do nothing if nothing actually changes. */ |
2318 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2319 | return flag; | |
2320 | ||
38babc07 KS |
2321 | GCPRO1 (old_undo); |
2322 | ||
2323 | /* Don't record these buffer changes. We will put a special undo entry | |
2324 | instead. */ | |
2325 | current_buffer->undo_list = Qt; | |
b05525fa | 2326 | |
3ac81adb RS |
2327 | /* If the cached position is for this buffer, clear it out. */ |
2328 | clear_charpos_cache (current_buffer); | |
2329 | ||
458c8af4 KH |
2330 | if (NILP (flag)) |
2331 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2332 | else | |
2333 | begv = BEGV, zv = ZV; | |
2334 | ||
a9bcded1 KH |
2335 | if (narrowed) |
2336 | Fwiden (); | |
2337 | ||
3ac81adb RS |
2338 | if (NILP (flag)) |
2339 | { | |
a9bcded1 KH |
2340 | int pos, stop; |
2341 | unsigned char *p; | |
2342 | ||
3ac81adb RS |
2343 | /* Do this first, so it can use CHAR_TO_BYTE |
2344 | to calculate the old correspondences. */ | |
2345 | set_intervals_multibyte (0); | |
2346 | ||
2347 | current_buffer->enable_multibyte_characters = Qnil; | |
2348 | ||
2349 | Z = Z_BYTE; | |
2350 | BEGV = BEGV_BYTE; | |
2351 | ZV = ZV_BYTE; | |
2352 | GPT = GPT_BYTE; | |
2353 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2354 | ||
60ebfdf3 | 2355 | |
65745fad SM |
2356 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2357 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2358 | |
2359 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2360 | pos = BEG; | |
2361 | stop = GPT; | |
2362 | p = BEG_ADDR; | |
2363 | while (1) | |
2364 | { | |
2365 | int c, bytes; | |
2366 | ||
2367 | if (pos == stop) | |
2368 | { | |
2369 | if (pos == Z) | |
2370 | break; | |
2371 | p = GAP_END_ADDR; | |
2372 | stop = Z; | |
2373 | } | |
8f348ed5 KH |
2374 | if (ASCII_BYTE_P (*p)) |
2375 | p++, pos++; | |
2376 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2377 | { |
62a6e103 | 2378 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 KH |
2379 | /* Delete all bytes for this 8-bit character but the |
2380 | last one, and change the last one to the charcter | |
2381 | code. */ | |
2382 | bytes--; | |
2383 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2384 | p = GAP_END_ADDR; | |
2385 | *p++ = c; | |
2386 | pos++; | |
2387 | if (begv > pos) | |
2388 | begv -= bytes; | |
2389 | if (zv > pos) | |
2390 | zv -= bytes; | |
2391 | stop = Z; | |
2392 | } | |
8f924df7 | 2393 | else |
8f348ed5 KH |
2394 | { |
2395 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2396 | p += bytes, pos += bytes; | |
2397 | } | |
a9bcded1 KH |
2398 | } |
2399 | if (narrowed) | |
2400 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2401 | } |
2402 | else | |
2403 | { | |
a9bcded1 KH |
2404 | int pt = PT; |
2405 | int pos, stop; | |
8f348ed5 | 2406 | unsigned char *p, *pend; |
a9bcded1 | 2407 | |
673c57d2 | 2408 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2409 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2410 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2411 | |
8f924df7 | 2412 | if (EQ (flag, Qt) |
a3a303df | 2413 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2414 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2415 | { | |
2416 | unsigned char *p = GPT_ADDR - 1; | |
2417 | ||
2418 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
409f2919 | 2419 | if (LEADING_CODE_P (*p)) |
673c57d2 KH |
2420 | { |
2421 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2422 | ||
2423 | move_gap_both (new_gpt, new_gpt); | |
2424 | } | |
2425 | } | |
2426 | ||
a9bcded1 KH |
2427 | /* Make the buffer contents valid as multibyte by converting |
2428 | 8-bit characters to multibyte form. */ | |
2429 | pos = BEG; | |
2430 | stop = GPT; | |
2431 | p = BEG_ADDR; | |
8f348ed5 | 2432 | pend = GPT_ADDR; |
a9bcded1 KH |
2433 | while (1) |
2434 | { | |
2435 | int bytes; | |
2436 | ||
2437 | if (pos == stop) | |
2438 | { | |
2439 | if (pos == Z) | |
2440 | break; | |
2441 | p = GAP_END_ADDR; | |
8f348ed5 | 2442 | pend = Z_ADDR; |
a9bcded1 KH |
2443 | stop = Z; |
2444 | } | |
177c0ea7 | 2445 | |
a3a303df KH |
2446 | if (ASCII_BYTE_P (*p)) |
2447 | p++, pos++; | |
dcfb9bc4 KH |
2448 | else if (EQ (flag, Qt) |
2449 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2450 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2451 | p += bytes, pos += bytes; |
2452 | else | |
2453 | { | |
2454 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2455 | int c; |
a9bcded1 | 2456 | |
8f924df7 | 2457 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2458 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2459 | *p = tmp[0]; |
2460 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2461 | bytes--; | |
2462 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2463 | /* Now the gap is after the just inserted data. */ | |
2464 | pos = GPT; | |
2465 | p = GAP_END_ADDR; | |
2466 | if (pos <= begv) | |
2467 | begv += bytes; | |
2468 | if (pos <= zv) | |
2469 | zv += bytes; | |
2470 | if (pos <= pt) | |
2471 | pt += bytes; | |
31285a8f | 2472 | pend = Z_ADDR; |
a9bcded1 KH |
2473 | stop = Z; |
2474 | } | |
2475 | } | |
2476 | ||
2477 | if (pt != PT) | |
2478 | TEMP_SET_PT (pt); | |
2479 | ||
2480 | if (narrowed) | |
2481 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2482 | ||
3ac81adb RS |
2483 | /* Do this first, so that chars_in_text asks the right question. |
2484 | set_intervals_multibyte needs it too. */ | |
2485 | current_buffer->enable_multibyte_characters = Qt; | |
2486 | ||
b05525fa | 2487 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2488 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2489 | |
673c57d2 | 2490 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2491 | |
2492 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2493 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2494 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2495 | else |
2496 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2497 | |
2498 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2499 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2500 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2501 | else |
2502 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2503 | |
2504 | { | |
2505 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2506 | int pt; | |
2507 | ||
2508 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2509 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2510 | else |
2511 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2512 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2513 | } | |
3ac81adb RS |
2514 | |
2515 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2516 | |
2517 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2518 | getting confused by the markers that have not yet been updated. | |
2519 | It is also a signal that it should never create a marker. */ | |
65745fad | 2520 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2521 | |
65745fad | 2522 | for (; tail; tail = tail->next) |
3ac81adb | 2523 | { |
65745fad SM |
2524 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2525 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2526 | } |
b69f9797 RS |
2527 | |
2528 | /* Make sure no markers were put on the chain | |
2529 | while the chain value was incorrect. */ | |
65745fad | 2530 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2531 | abort (); |
2532 | ||
3ac81adb RS |
2533 | BUF_MARKERS (current_buffer) = markers; |
2534 | ||
2535 | /* Do this last, so it can calculate the new correspondences | |
2536 | between chars and bytes. */ | |
2537 | set_intervals_multibyte (1); | |
2538 | } | |
2539 | ||
38babc07 KS |
2540 | if (!EQ (old_undo, Qt)) |
2541 | { | |
2542 | /* Represent all the above changes by a special undo entry. */ | |
2543 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2544 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2545 | intern ("set-buffer-multibyte"), | |
2546 | NILP (flag) ? Qt : Qnil), | |
2547 | old_undo); | |
38babc07 KS |
2548 | } |
2549 | ||
2550 | UNGCPRO; | |
a9bcded1 | 2551 | |
724b203f GM |
2552 | /* Changing the multibyteness of a buffer means that all windows |
2553 | showing that buffer must be updated thoroughly. */ | |
2554 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2555 | ++windows_or_buffers_changed; | |
2556 | ||
abc9d959 RS |
2557 | /* Copy this buffer's new multibyte status |
2558 | into all of its indirect buffers. */ | |
2559 | for (other = all_buffers; other; other = other->next) | |
2560 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2561 | { |
2562 | other->enable_multibyte_characters | |
2563 | = current_buffer->enable_multibyte_characters; | |
2564 | other->prevent_redisplay_optimizations_p = 1; | |
2565 | } | |
abc9d959 | 2566 | |
ed00559d KH |
2567 | /* Restore the modifiedness of the buffer. */ |
2568 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2569 | Fset_buffer_modified_p (Qnil); | |
2570 | ||
2a2b50a9 | 2571 | #ifdef subprocesses |
172f9454 KH |
2572 | /* Update coding systems of this buffer's process (if any). */ |
2573 | { | |
2574 | Lisp_Object process; | |
2575 | ||
2576 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2577 | if (PROCESSP (process)) | |
2578 | setup_process_coding_systems (process); | |
2579 | } | |
2a2b50a9 | 2580 | #endif /* subprocesses */ |
172f9454 | 2581 | |
3ac81adb RS |
2582 | return flag; |
2583 | } | |
2584 | \f | |
1ab256cb | 2585 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2586 | 0, 0, 0, |
7ee72033 | 2587 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2588 | Most local variable bindings are eliminated so that the default values |
2589 | become effective once more. Also, the syntax table is set from | |
2590 | `standard-syntax-table', the local keymap is set to nil, | |
2591 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2592 | This function also forces redisplay of the mode line. | |
2593 | ||
2594 | Every function to select a new major mode starts by | |
2595 | calling this function. | |
2596 | ||
2597 | As a special exception, local variables whose names have | |
2598 | a non-nil `permanent-local' property are not eliminated by this function. | |
2599 | ||
2600 | The first thing this function does is run | |
7ee72033 MB |
2601 | the normal hook `change-major-mode-hook'. */) |
2602 | () | |
1ab256cb | 2603 | { |
fd186f07 | 2604 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2605 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2606 | |
3709505e | 2607 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2608 | remain swapped in, in their symbols. */ |
1ab256cb | 2609 | |
2f3f993b | 2610 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2611 | |
2612 | /* Actually eliminate all local bindings of this buffer. */ | |
2613 | ||
13de9290 | 2614 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2615 | |
1ab256cb RM |
2616 | /* Force mode-line redisplay. Useful here because all major mode |
2617 | commands call this function. */ | |
2618 | update_mode_lines++; | |
2619 | ||
2620 | return Qnil; | |
2621 | } | |
2f3f993b RS |
2622 | |
2623 | /* Make sure no local variables remain set up with buffer B | |
2624 | for their current values. */ | |
2625 | ||
2626 | static void | |
d3da34e0 | 2627 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2628 | { |
ce5b453a | 2629 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2630 | |
2631 | XSETBUFFER (buffer, b); | |
2632 | oalist = b->local_var_alist; | |
2633 | ||
67ee9f6e | 2634 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2635 | { |
ce5b453a SM |
2636 | Lisp_Object sym = XCAR (XCAR (alist)); |
2637 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2638 | /* Need not do anything if some other buffer's binding is | |
2639 | now encached. */ | |
2640 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) | |
2f3f993b | 2641 | { |
e7c10f83 SM |
2642 | /* Symbol is set up for this buffer's old local value: |
2643 | swap it out! */ | |
ce5b453a | 2644 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2645 | } |
2646 | } | |
2647 | } | |
1ab256cb | 2648 | \f |
2eec3b4e | 2649 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2650 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2651 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2652 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2653 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2654 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2655 | or where an overlay starts which ends at or after POS; |
624d2678 | 2656 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2657 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2658 | |
2659 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2660 | when this function is called. |
2661 | ||
2662 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2663 | If EXTEND is zero, we never extend the vector, | |
2664 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2665 | But we still return the total number of overlays. |
2666 | ||
2667 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2668 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2669 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2670 | |
2671 | int | |
d3da34e0 JB |
2672 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2673 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) | |
1ab256cb | 2674 | { |
2410d73a SM |
2675 | Lisp_Object overlay, start, end; |
2676 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2677 | int idx = 0; |
2678 | int len = *len_ptr; | |
2679 | Lisp_Object *vec = *vec_ptr; | |
2680 | int next = ZV; | |
239c932b | 2681 | int prev = BEGV; |
61d54cd5 RS |
2682 | int inhibit_storing = 0; |
2683 | ||
2410d73a | 2684 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2685 | { |
239c932b | 2686 | int startpos, endpos; |
52f8ec73 | 2687 | |
2410d73a | 2688 | XSETMISC (overlay, tail); |
1ab256cb | 2689 | |
2eec3b4e RS |
2690 | start = OVERLAY_START (overlay); |
2691 | end = OVERLAY_END (overlay); | |
239c932b RS |
2692 | endpos = OVERLAY_POSITION (end); |
2693 | if (endpos < pos) | |
2694 | { | |
2695 | if (prev < endpos) | |
2696 | prev = endpos; | |
2697 | break; | |
2698 | } | |
413e06a4 RS |
2699 | startpos = OVERLAY_POSITION (start); |
2700 | /* This one ends at or after POS | |
daa1c109 | 2701 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2702 | if (prev < startpos && startpos < pos) |
2703 | prev = startpos; | |
239c932b RS |
2704 | if (endpos == pos) |
2705 | continue; | |
2eec3b4e RS |
2706 | if (startpos <= pos) |
2707 | { | |
2708 | if (idx == len) | |
2709 | { | |
61d54cd5 RS |
2710 | /* The supplied vector is full. |
2711 | Either make it bigger, or don't store any more in it. */ | |
2712 | if (extend) | |
2713 | { | |
0552666b GM |
2714 | /* Make it work with an initial len == 0. */ |
2715 | len *= 2; | |
2716 | if (len == 0) | |
2717 | len = 4; | |
2718 | *len_ptr = len; | |
61d54cd5 RS |
2719 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2720 | *vec_ptr = vec; | |
2721 | } | |
2722 | else | |
2723 | inhibit_storing = 1; | |
2eec3b4e | 2724 | } |
61d54cd5 RS |
2725 | |
2726 | if (!inhibit_storing) | |
2727 | vec[idx] = overlay; | |
2728 | /* Keep counting overlays even if we can't return them all. */ | |
2729 | idx++; | |
2eec3b4e RS |
2730 | } |
2731 | else if (startpos < next) | |
2732 | next = startpos; | |
2733 | } | |
2734 | ||
2410d73a | 2735 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2736 | { |
239c932b | 2737 | int startpos, endpos; |
52f8ec73 | 2738 | |
2410d73a | 2739 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2740 | |
2741 | start = OVERLAY_START (overlay); | |
2742 | end = OVERLAY_END (overlay); | |
2743 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2744 | if (pos < startpos) |
2eec3b4e RS |
2745 | { |
2746 | if (startpos < next) | |
2747 | next = startpos; | |
2748 | break; | |
2749 | } | |
239c932b RS |
2750 | endpos = OVERLAY_POSITION (end); |
2751 | if (pos < endpos) | |
2eec3b4e RS |
2752 | { |
2753 | if (idx == len) | |
2754 | { | |
61d54cd5 RS |
2755 | if (extend) |
2756 | { | |
4b0e44fc RS |
2757 | /* Make it work with an initial len == 0. */ |
2758 | len *= 2; | |
0552666b | 2759 | if (len == 0) |
4b0e44fc RS |
2760 | len = 4; |
2761 | *len_ptr = len; | |
61d54cd5 RS |
2762 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2763 | *vec_ptr = vec; | |
2764 | } | |
2765 | else | |
2766 | inhibit_storing = 1; | |
2eec3b4e | 2767 | } |
61d54cd5 RS |
2768 | |
2769 | if (!inhibit_storing) | |
2770 | vec[idx] = overlay; | |
2771 | idx++; | |
413e06a4 RS |
2772 | |
2773 | if (startpos < pos && startpos > prev) | |
2774 | prev = startpos; | |
2eec3b4e | 2775 | } |
239c932b RS |
2776 | else if (endpos < pos && endpos > prev) |
2777 | prev = endpos; | |
1d5f4c1d MB |
2778 | else if (endpos == pos && startpos > prev |
2779 | && (!change_req || startpos < pos)) | |
413e06a4 | 2780 | prev = startpos; |
1ab256cb RM |
2781 | } |
2782 | ||
239c932b RS |
2783 | if (next_ptr) |
2784 | *next_ptr = next; | |
2785 | if (prev_ptr) | |
2786 | *prev_ptr = prev; | |
2eec3b4e RS |
2787 | return idx; |
2788 | } | |
74514898 | 2789 | \f |
7723e095 MR |
2790 | /* Find all the overlays in the current buffer that overlap the range |
2791 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2792 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2793 | |
177c0ea7 | 2794 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2795 | Store in *LEN_PTR the size allocated for the vector. |
2796 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2797 | or ZV if there are no more overlays. | |
2798 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2799 | or BEGV if there are no previous overlays. | |
2800 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2801 | ||
2802 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2803 | when this function is called. | |
2804 | ||
2805 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2806 | If EXTEND is zero, we never extend the vector, | |
2807 | and we store only as many overlays as will fit. | |
2808 | But we still return the total number of overlays. */ | |
2809 | ||
a9b9a780 | 2810 | static int |
d3da34e0 JB |
2811 | overlays_in (int beg, int end, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2812 | int *next_ptr, int *prev_ptr) | |
74514898 | 2813 | { |
2410d73a SM |
2814 | Lisp_Object overlay, ostart, oend; |
2815 | struct Lisp_Overlay *tail; | |
74514898 RS |
2816 | int idx = 0; |
2817 | int len = *len_ptr; | |
2818 | Lisp_Object *vec = *vec_ptr; | |
2819 | int next = ZV; | |
2820 | int prev = BEGV; | |
2821 | int inhibit_storing = 0; | |
7723e095 | 2822 | int end_is_Z = end == Z; |
74514898 | 2823 | |
2410d73a | 2824 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2825 | { |
2826 | int startpos, endpos; | |
2827 | ||
2410d73a | 2828 | XSETMISC (overlay, tail); |
74514898 RS |
2829 | |
2830 | ostart = OVERLAY_START (overlay); | |
2831 | oend = OVERLAY_END (overlay); | |
2832 | endpos = OVERLAY_POSITION (oend); | |
2833 | if (endpos < beg) | |
2834 | { | |
2835 | if (prev < endpos) | |
2836 | prev = endpos; | |
2837 | break; | |
2838 | } | |
2839 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2840 | /* Count an interval if it overlaps the range, is empty at the |
2841 | start of the range, or is empty at END provided END denotes the | |
2842 | end of the buffer. */ | |
74514898 | 2843 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2844 | || (startpos == endpos |
2845 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2846 | { |
2847 | if (idx == len) | |
2848 | { | |
2849 | /* The supplied vector is full. | |
2850 | Either make it bigger, or don't store any more in it. */ | |
2851 | if (extend) | |
2852 | { | |
4b0e44fc RS |
2853 | /* Make it work with an initial len == 0. */ |
2854 | len *= 2; | |
2855 | if (len == 0) | |
2856 | len = 4; | |
2857 | *len_ptr = len; | |
74514898 RS |
2858 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2859 | *vec_ptr = vec; | |
2860 | } | |
2861 | else | |
2862 | inhibit_storing = 1; | |
2863 | } | |
2864 | ||
2865 | if (!inhibit_storing) | |
2866 | vec[idx] = overlay; | |
2867 | /* Keep counting overlays even if we can't return them all. */ | |
2868 | idx++; | |
2869 | } | |
2870 | else if (startpos < next) | |
2871 | next = startpos; | |
2872 | } | |
2873 | ||
2410d73a | 2874 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2875 | { |
2876 | int startpos, endpos; | |
2877 | ||
2410d73a | 2878 | XSETMISC (overlay, tail); |
74514898 RS |
2879 | |
2880 | ostart = OVERLAY_START (overlay); | |
2881 | oend = OVERLAY_END (overlay); | |
2882 | startpos = OVERLAY_POSITION (ostart); | |
2883 | if (end < startpos) | |
2884 | { | |
2885 | if (startpos < next) | |
2886 | next = startpos; | |
2887 | break; | |
2888 | } | |
2889 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2890 | /* Count an interval if it overlaps the range, is empty at the |
2891 | start of the range, or is empty at END provided END denotes the | |
2892 | end of the buffer. */ | |
74514898 | 2893 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2894 | || (startpos == endpos |
2895 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2896 | { |
2897 | if (idx == len) | |
2898 | { | |
2899 | if (extend) | |
2900 | { | |
4b0e44fc RS |
2901 | /* Make it work with an initial len == 0. */ |
2902 | len *= 2; | |
2903 | if (len == 0) | |
2904 | len = 4; | |
2905 | *len_ptr = len; | |
74514898 RS |
2906 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2907 | *vec_ptr = vec; | |
2908 | } | |
2909 | else | |
2910 | inhibit_storing = 1; | |
2911 | } | |
2912 | ||
2913 | if (!inhibit_storing) | |
2914 | vec[idx] = overlay; | |
2915 | idx++; | |
2916 | } | |
2917 | else if (endpos < beg && endpos > prev) | |
2918 | prev = endpos; | |
2919 | } | |
fc04fa47 | 2920 | |
74514898 RS |
2921 | if (next_ptr) |
2922 | *next_ptr = next; | |
2923 | if (prev_ptr) | |
2924 | *prev_ptr = prev; | |
2925 | return idx; | |
2926 | } | |
09a22085 GM |
2927 | |
2928 | ||
2929 | /* Return non-zero if there exists an overlay with a non-nil | |
2930 | `mouse-face' property overlapping OVERLAY. */ | |
2931 | ||
2932 | int | |
d3da34e0 | 2933 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 GM |
2934 | { |
2935 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2936 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2937 | int n, i, size; |
09a22085 | 2938 | Lisp_Object *v, tem; |
177c0ea7 | 2939 | |
bfd8410f GM |
2940 | size = 10; |
2941 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2942 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2943 | if (n > size) | |
09a22085 | 2944 | { |
09a22085 GM |
2945 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2946 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2947 | } | |
2948 | ||
2949 | for (i = 0; i < n; ++i) | |
2950 | if (!EQ (v[i], overlay) | |
2951 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2952 | !NILP (tem))) | |
2953 | break; | |
2954 | ||
2955 | return i < n; | |
2956 | } | |
2957 | ||
2958 | ||
74514898 | 2959 | \f |
fc04fa47 KH |
2960 | /* Fast function to just test if we're at an overlay boundary. */ |
2961 | int | |
d3da34e0 | 2962 | overlay_touches_p (int pos) |
fc04fa47 | 2963 | { |
2410d73a SM |
2964 | Lisp_Object overlay; |
2965 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2966 | |
2410d73a | 2967 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2968 | { |
2969 | int endpos; | |
2970 | ||
2410d73a | 2971 | XSETMISC (overlay ,tail); |
8e50cc2d | 2972 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2973 | abort (); |
2974 | ||
2975 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2976 | if (endpos < pos) | |
2977 | break; | |
2978 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2979 | return 1; | |
2980 | } | |
2981 | ||
2410d73a | 2982 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2983 | { |
2984 | int startpos; | |
2985 | ||
2410d73a | 2986 | XSETMISC (overlay, tail); |
8e50cc2d | 2987 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2988 | abort (); |
2989 | ||
2990 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2991 | if (pos < startpos) | |
2992 | break; | |
2993 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2994 | return 1; | |
2995 | } | |
2996 | return 0; | |
2997 | } | |
2eec3b4e | 2998 | \f |
5985d248 KH |
2999 | struct sortvec |
3000 | { | |
3001 | Lisp_Object overlay; | |
3002 | int beg, end; | |
3003 | int priority; | |
3004 | }; | |
3005 | ||
3006 | static int | |
d3da34e0 | 3007 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 3008 | { |
dfcf069d AS |
3009 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3010 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
3011 | if (s1->priority != s2->priority) |
3012 | return s1->priority - s2->priority; | |
3013 | if (s1->beg != s2->beg) | |
3014 | return s1->beg - s2->beg; | |
3015 | if (s1->end != s2->end) | |
3016 | return s2->end - s1->end; | |
3017 | return 0; | |
3018 | } | |
3019 | ||
3020 | /* Sort an array of overlays by priority. The array is modified in place. | |
3021 | The return value is the new size; this may be smaller than the original | |
3022 | size if some of the overlays were invalid or were window-specific. */ | |
3023 | int | |
d3da34e0 | 3024 | sort_overlays (Lisp_Object *overlay_vec, int noverlays, struct window *w) |
5985d248 KH |
3025 | { |
3026 | int i, j; | |
3027 | struct sortvec *sortvec; | |
3028 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
3029 | ||
3030 | /* Put the valid and relevant overlays into sortvec. */ | |
3031 | ||
3032 | for (i = 0, j = 0; i < noverlays; i++) | |
3033 | { | |
0fa767e7 | 3034 | Lisp_Object tem; |
c99fc30f | 3035 | Lisp_Object overlay; |
5985d248 | 3036 | |
c99fc30f | 3037 | overlay = overlay_vec[i]; |
5985d248 KH |
3038 | if (OVERLAY_VALID (overlay) |
3039 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
3040 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3041 | { | |
0fa767e7 KH |
3042 | /* If we're interested in a specific window, then ignore |
3043 | overlays that are limited to some other window. */ | |
3044 | if (w) | |
5985d248 | 3045 | { |
0fa767e7 KH |
3046 | Lisp_Object window; |
3047 | ||
3048 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 3049 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3050 | continue; |
5985d248 | 3051 | } |
0fa767e7 KH |
3052 | |
3053 | /* This overlay is good and counts: put it into sortvec. */ | |
3054 | sortvec[j].overlay = overlay; | |
3055 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3056 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3057 | tem = Foverlay_get (overlay, Qpriority); | |
3058 | if (INTEGERP (tem)) | |
3059 | sortvec[j].priority = XINT (tem); | |
3060 | else | |
3061 | sortvec[j].priority = 0; | |
3062 | j++; | |
5985d248 KH |
3063 | } |
3064 | } | |
3065 | noverlays = j; | |
3066 | ||
3067 | /* Sort the overlays into the proper order: increasing priority. */ | |
3068 | ||
3069 | if (noverlays > 1) | |
3070 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3071 | ||
3072 | for (i = 0; i < noverlays; i++) | |
3073 | overlay_vec[i] = sortvec[i].overlay; | |
3074 | return (noverlays); | |
3075 | } | |
3076 | \f | |
bbbe9545 KH |
3077 | struct sortstr |
3078 | { | |
cb26008f | 3079 | Lisp_Object string, string2; |
bbbe9545 KH |
3080 | int size; |
3081 | int priority; | |
3082 | }; | |
3083 | ||
e8185fa8 KH |
3084 | struct sortstrlist |
3085 | { | |
3086 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3087 | int size; /* Allocated length of that array. */ | |
3088 | int used; /* How much of the array is currently in use. */ | |
3089 | int bytes; /* Total length of the strings in buf. */ | |
3090 | }; | |
3091 | ||
3092 | /* Buffers for storing information about the overlays touching a given | |
3093 | position. These could be automatic variables in overlay_strings, but | |
3094 | it's more efficient to hold onto the memory instead of repeatedly | |
3095 | allocating and freeing it. */ | |
3096 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3097 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3098 | |
3099 | /* Allocated length of overlay_str_buf. */ | |
3100 | static int overlay_str_len; | |
3101 | ||
bbbe9545 KH |
3102 | /* A comparison function suitable for passing to qsort. */ |
3103 | static int | |
d3da34e0 | 3104 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3105 | { |
3106 | struct sortstr *s1 = (struct sortstr *)as1; | |
3107 | struct sortstr *s2 = (struct sortstr *)as2; | |
3108 | if (s1->size != s2->size) | |
3109 | return s2->size - s1->size; | |
3110 | if (s1->priority != s2->priority) | |
3111 | return s1->priority - s2->priority; | |
3112 | return 0; | |
3113 | } | |
3114 | ||
e8185fa8 | 3115 | static void |
d3da34e0 | 3116 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, Lisp_Object str2, Lisp_Object pri, int size) |
e8185fa8 | 3117 | { |
43d27a72 RS |
3118 | int nbytes; |
3119 | ||
e8185fa8 KH |
3120 | if (ssl->used == ssl->size) |
3121 | { | |
3122 | if (ssl->buf) | |
3123 | ssl->size *= 2; | |
3124 | else | |
3125 | ssl->size = 5; | |
3126 | ssl->buf = ((struct sortstr *) | |
3127 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3128 | } | |
3129 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3130 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3131 | ssl->buf[ssl->used].size = size; |
3132 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3133 | ssl->used++; | |
43d27a72 RS |
3134 | |
3135 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3136 | nbytes = SCHARS (str); |
43d27a72 | 3137 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3138 | nbytes = count_size_as_multibyte (SDATA (str), |
3139 | SBYTES (str)); | |
43d27a72 | 3140 | else |
d5db4077 | 3141 | nbytes = SBYTES (str); |
43d27a72 RS |
3142 | |
3143 | ssl->bytes += nbytes; | |
3144 | ||
cb26008f | 3145 | if (STRINGP (str2)) |
43d27a72 RS |
3146 | { |
3147 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3148 | nbytes = SCHARS (str2); |
43d27a72 | 3149 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3150 | nbytes = count_size_as_multibyte (SDATA (str2), |
3151 | SBYTES (str2)); | |
43d27a72 | 3152 | else |
d5db4077 | 3153 | nbytes = SBYTES (str2); |
43d27a72 RS |
3154 | |
3155 | ssl->bytes += nbytes; | |
3156 | } | |
e8185fa8 | 3157 | } |
bbbe9545 KH |
3158 | |
3159 | /* Return the concatenation of the strings associated with overlays that | |
3160 | begin or end at POS, ignoring overlays that are specific to a window | |
3161 | other than W. The strings are concatenated in the appropriate order: | |
3162 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3163 | lower. Normally all of the after-strings come first, but zero-sized |
3164 | overlays have their after-strings ride along with the before-strings | |
3165 | because it would look strange to print them inside-out. | |
3166 | ||
3167 | Returns the string length, and stores the contents indirectly through | |
3168 | PSTR, if that variable is non-null. The string may be overwritten by | |
3169 | subsequent calls. */ | |
6b5d3b89 | 3170 | |
bbbe9545 | 3171 | int |
d3da34e0 | 3172 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3173 | { |
2410d73a SM |
3174 | Lisp_Object overlay, window, str; |
3175 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3176 | int startpos, endpos; |
43d27a72 | 3177 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3178 | |
e8185fa8 KH |
3179 | overlay_heads.used = overlay_heads.bytes = 0; |
3180 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3181 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3182 | { |
2410d73a | 3183 | XSETMISC (overlay, ov); |
c2d5b10f | 3184 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3185 | |
3186 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3187 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3188 | if (endpos < pos) | |
3189 | break; | |
3190 | if (endpos != pos && startpos != pos) | |
3191 | continue; | |
3192 | window = Foverlay_get (overlay, Qwindow); | |
3193 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3194 | continue; | |
e8185fa8 KH |
3195 | if (startpos == pos |
3196 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3197 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3198 | (startpos == endpos |
3199 | ? Foverlay_get (overlay, Qafter_string) | |
3200 | : Qnil), | |
3201 | Foverlay_get (overlay, Qpriority), | |
3202 | endpos - startpos); | |
3203 | else if (endpos == pos | |
3204 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3205 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3206 | Foverlay_get (overlay, Qpriority), |
3207 | endpos - startpos); | |
bbbe9545 | 3208 | } |
2410d73a | 3209 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3210 | { |
2410d73a SM |
3211 | XSETMISC (overlay, ov); |
3212 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3213 | |
3214 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3215 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3216 | if (startpos > pos) | |
3217 | break; | |
e8185fa8 KH |
3218 | if (endpos != pos && startpos != pos) |
3219 | continue; | |
3220 | window = Foverlay_get (overlay, Qwindow); | |
3221 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3222 | continue; | |
e8185fa8 KH |
3223 | if (startpos == pos |
3224 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3225 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3226 | (startpos == endpos |
3227 | ? Foverlay_get (overlay, Qafter_string) | |
3228 | : Qnil), | |
3229 | Foverlay_get (overlay, Qpriority), | |
3230 | endpos - startpos); | |
3231 | else if (endpos == pos | |
3232 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3233 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3234 | Foverlay_get (overlay, Qpriority), |
3235 | endpos - startpos); | |
bbbe9545 | 3236 | } |
e8185fa8 KH |
3237 | if (overlay_tails.used > 1) |
3238 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3239 | cmp_for_strings); | |
3240 | if (overlay_heads.used > 1) | |
3241 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3242 | cmp_for_strings); | |
3243 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3244 | { |
e8185fa8 | 3245 | Lisp_Object tem; |
bbbe9545 | 3246 | int i; |
9f4d7cde | 3247 | unsigned char *p; |
e8185fa8 | 3248 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3249 | |
3250 | if (total > overlay_str_len) | |
9f4d7cde RS |
3251 | { |
3252 | overlay_str_len = total; | |
3253 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3254 | total); | |
3255 | } | |
bbbe9545 | 3256 | p = overlay_str_buf; |
e8185fa8 | 3257 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3258 | { |
43d27a72 | 3259 | int nbytes; |
e8185fa8 | 3260 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3261 | nbytes = copy_text (SDATA (tem), p, |
3262 | SBYTES (tem), | |
43d27a72 RS |
3263 | STRING_MULTIBYTE (tem), multibyte); |
3264 | p += nbytes; | |
bbbe9545 | 3265 | } |
e8185fa8 | 3266 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3267 | { |
43d27a72 | 3268 | int nbytes; |
e8185fa8 | 3269 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3270 | nbytes = copy_text (SDATA (tem), p, |
3271 | SBYTES (tem), | |
43d27a72 RS |
3272 | STRING_MULTIBYTE (tem), multibyte); |
3273 | p += nbytes; | |
cb26008f KH |
3274 | tem = overlay_heads.buf[i].string2; |
3275 | if (STRINGP (tem)) | |
3276 | { | |
d5db4077 KR |
3277 | nbytes = copy_text (SDATA (tem), p, |
3278 | SBYTES (tem), | |
43d27a72 RS |
3279 | STRING_MULTIBYTE (tem), multibyte); |
3280 | p += nbytes; | |
cb26008f | 3281 | } |
bbbe9545 | 3282 | } |
cb26008f KH |
3283 | if (p != overlay_str_buf + total) |
3284 | abort (); | |
bbbe9545 KH |
3285 | if (pstr) |
3286 | *pstr = overlay_str_buf; | |
e8185fa8 | 3287 | return total; |
bbbe9545 | 3288 | } |
e8185fa8 | 3289 | return 0; |
bbbe9545 KH |
3290 | } |
3291 | \f | |
5c4f68f1 | 3292 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3293 | |
2eec3b4e | 3294 | void |
d3da34e0 | 3295 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3296 | { |
2410d73a SM |
3297 | Lisp_Object overlay, beg, end; |
3298 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3299 | |
3300 | /* See if anything in overlays_before should move to overlays_after. */ | |
3301 | ||
3302 | /* We don't strictly need prev in this loop; it should always be nil. | |
3303 | But we use it for symmetry and in case that should cease to be true | |
3304 | with some future change. */ | |
2410d73a SM |
3305 | prev = NULL; |
3306 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3307 | { |
2410d73a SM |
3308 | next = tail->next; |
3309 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3310 | |
3311 | /* If the overlay is not valid, get rid of it. */ | |
3312 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3313 | #if 1 |
3314 | abort (); | |
3315 | #else | |
2eec3b4e RS |
3316 | { |
3317 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3318 | if (!NILP (prev)) | |
7539e11f | 3319 | XCDR (prev) = next; |
2eec3b4e | 3320 | else |
5c4f68f1 | 3321 | buf->overlays_before = next; |
2eec3b4e RS |
3322 | tail = prev; |
3323 | continue; | |
3324 | } | |
52f8ec73 | 3325 | #endif |
1ab256cb | 3326 | |
2eec3b4e RS |
3327 | beg = OVERLAY_START (overlay); |
3328 | end = OVERLAY_END (overlay); | |
1ab256cb | 3329 | |
2eec3b4e | 3330 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3331 | { |
2eec3b4e RS |
3332 | /* OVERLAY needs to be moved. */ |
3333 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3334 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3335 | |
3336 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3337 | if (prev) |
3338 | prev->next = next; | |
2eec3b4e | 3339 | else |
5c4f68f1 | 3340 | buf->overlays_before = next; |
2eec3b4e RS |
3341 | |
3342 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3343 | other_prev = NULL; |
3344 | for (other = buf->overlays_after; other; | |
3345 | other_prev = other, other = other->next) | |
1ab256cb | 3346 | { |
6af718a4 | 3347 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3348 | |
2410d73a SM |
3349 | XSETMISC (otheroverlay, other); |
3350 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3351 | |
3352 | otherbeg = OVERLAY_START (otheroverlay); | |
3353 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3354 | break; | |
1ab256cb | 3355 | } |
2eec3b4e RS |
3356 | |
3357 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3358 | tail->next = other; |
3359 | if (other_prev) | |
3360 | other_prev->next = tail; | |
1ab256cb | 3361 | else |
5c4f68f1 | 3362 | buf->overlays_after = tail; |
2eec3b4e | 3363 | tail = prev; |
1ab256cb | 3364 | } |
2eec3b4e RS |
3365 | else |
3366 | /* We've reached the things that should stay in overlays_before. | |
3367 | All the rest of overlays_before must end even earlier, | |
3368 | so stop now. */ | |
3369 | break; | |
3370 | } | |
3371 | ||
3372 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3373 | prev = NULL; |
3374 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3375 | { |
2410d73a SM |
3376 | next = tail->next; |
3377 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3378 | |
3379 | /* If the overlay is not valid, get rid of it. */ | |
3380 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3381 | #if 1 |
3382 | abort (); | |
3383 | #else | |
2eec3b4e RS |
3384 | { |
3385 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3386 | if (!NILP (prev)) | |
7539e11f | 3387 | XCDR (prev) = next; |
2eec3b4e | 3388 | else |
5c4f68f1 | 3389 | buf->overlays_after = next; |
2eec3b4e RS |
3390 | tail = prev; |
3391 | continue; | |
3392 | } | |
52f8ec73 | 3393 | #endif |
2eec3b4e RS |
3394 | |
3395 | beg = OVERLAY_START (overlay); | |
3396 | end = OVERLAY_END (overlay); | |
3397 | ||
3398 | /* Stop looking, when we know that nothing further | |
3399 | can possibly end before POS. */ | |
3400 | if (OVERLAY_POSITION (beg) > pos) | |
3401 | break; | |
3402 | ||
3403 | if (OVERLAY_POSITION (end) <= pos) | |
3404 | { | |
3405 | /* OVERLAY needs to be moved. */ | |
3406 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3407 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3408 | |
3409 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3410 | if (prev) |
3411 | prev->next = next; | |
2eec3b4e | 3412 | else |
5c4f68f1 | 3413 | buf->overlays_after = next; |
2eec3b4e RS |
3414 | |
3415 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3416 | other_prev = NULL; |
3417 | for (other = buf->overlays_before; other; | |
3418 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3419 | { |
3420 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3421 | |
2410d73a SM |
3422 | XSETMISC (otheroverlay, other); |
3423 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3424 | |
3425 | otherend = OVERLAY_END (otheroverlay); | |
3426 | if (OVERLAY_POSITION (otherend) <= where) | |
3427 | break; | |
3428 | } | |
3429 | ||
3430 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3431 | tail->next = other; |
3432 | if (other_prev) | |
3433 | other_prev->next = tail; | |
2eec3b4e | 3434 | else |
5c4f68f1 | 3435 | buf->overlays_before = tail; |
2eec3b4e RS |
3436 | tail = prev; |
3437 | } | |
3438 | } | |
3439 | ||
c2d5b10f | 3440 | buf->overlay_center = pos; |
2eec3b4e | 3441 | } |
2b1bdf65 | 3442 | |
423cdb46 | 3443 | void |
d3da34e0 | 3444 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3445 | { |
3446 | /* After an insertion, the lists are still sorted properly, | |
3447 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3448 | if (current_buffer->overlay_center >= pos) |
3449 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3450 | } |
3451 | ||
3452 | void | |
d3da34e0 | 3453 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3454 | { |
c2d5b10f | 3455 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3456 | /* The deletion was to our right. No change needed; the before- and |
3457 | after-lists are still consistent. */ | |
3458 | ; | |
c2d5b10f | 3459 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3460 | /* The deletion was to our left. We need to adjust the center value |
3461 | to account for the change in position, but the lists are consistent | |
3462 | given the new value. */ | |
c2d5b10f | 3463 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3464 | else |
3465 | /* We're right in the middle. There might be things on the after-list | |
3466 | that now belong on the before-list. Recentering will move them, | |
3467 | and also update the center point. */ | |
3468 | recenter_overlay_lists (current_buffer, pos); | |
3469 | } | |
3470 | ||
2b1bdf65 KH |
3471 | /* Fix up overlays that were garbled as a result of permuting markers |
3472 | in the range START through END. Any overlay with at least one | |
3473 | endpoint in this range will need to be unlinked from the overlay | |
3474 | list and reinserted in its proper place. | |
3475 | Such an overlay might even have negative size at this point. | |
6b61353c | 3476 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3477 | void |
d3da34e0 | 3478 | fix_start_end_in_overlays (register int start, register int end) |
2b1bdf65 | 3479 | { |
6af718a4 | 3480 | Lisp_Object overlay; |
2410d73a | 3481 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3482 | /* These are either nil, indicating that before_list or after_list |
3483 | should be assigned, or the cons cell the cdr of which should be | |
3484 | assigned. */ | |
2410d73a | 3485 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3486 | /* 'Parent', likewise, indicates a cons cell or |
3487 | current_buffer->overlays_before or overlays_after, depending | |
3488 | which loop we're in. */ | |
2410d73a | 3489 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3490 | int startpos, endpos; |
3491 | ||
3492 | /* This algorithm shifts links around instead of consing and GCing. | |
3493 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3494 | well-formed list except that its last element, the CDR of beforep |
3495 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3496 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3497 | that before_list isn't initialized, although it may look | |
3498 | strange. */ | |
2410d73a | 3499 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3500 | { |
2410d73a | 3501 | XSETMISC (overlay, tail); |
6b61353c | 3502 | |
2b1bdf65 | 3503 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3504 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3505 | ||
3506 | /* If the overlay is backwards, make it empty. */ | |
3507 | if (endpos < startpos) | |
3508 | { | |
3509 | startpos = endpos; | |
3510 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3511 | Qnil); | |
3512 | } | |
3513 | ||
2b1bdf65 KH |
3514 | if (endpos < start) |
3515 | break; | |
60ebfdf3 | 3516 | |
2b1bdf65 KH |
3517 | if (endpos < end |
3518 | || (startpos >= start && startpos < end)) | |
3519 | { | |
2b1bdf65 KH |
3520 | /* Add it to the end of the wrong list. Later on, |
3521 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3522 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3523 | { |
2410d73a | 3524 | if (!afterp) |
1138e742 KR |
3525 | after_list = tail; |
3526 | else | |
2410d73a | 3527 | afterp->next = tail; |
1138e742 | 3528 | afterp = tail; |
2b1bdf65 KH |
3529 | } |
3530 | else | |
3531 | { | |
2410d73a | 3532 | if (!beforep) |
1138e742 KR |
3533 | before_list = tail; |
3534 | else | |
2410d73a | 3535 | beforep->next = tail; |
1138e742 | 3536 | beforep = tail; |
2b1bdf65 | 3537 | } |
2410d73a SM |
3538 | if (!parent) |
3539 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3540 | else |
2410d73a SM |
3541 | parent->next = tail->next; |
3542 | tail = tail->next; | |
2b1bdf65 KH |
3543 | } |
3544 | else | |
2410d73a | 3545 | parent = tail, tail = parent->next; |
2b1bdf65 | 3546 | } |
2410d73a | 3547 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3548 | { |
2410d73a | 3549 | XSETMISC (overlay, tail); |
6b61353c | 3550 | |
2b1bdf65 | 3551 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3552 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3553 | ||
3554 | /* If the overlay is backwards, make it empty. */ | |
3555 | if (endpos < startpos) | |
3556 | { | |
3557 | startpos = endpos; | |
3558 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3559 | Qnil); |
6b61353c KH |
3560 | } |
3561 | ||
2b1bdf65 KH |
3562 | if (startpos >= end) |
3563 | break; | |
6b61353c | 3564 | |
2b1bdf65 KH |
3565 | if (startpos >= start |
3566 | || (endpos >= start && endpos < end)) | |
3567 | { | |
c2d5b10f | 3568 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3569 | { |
2410d73a | 3570 | if (!afterp) |
1138e742 KR |
3571 | after_list = tail; |
3572 | else | |
2410d73a | 3573 | afterp->next = tail; |
1138e742 | 3574 | afterp = tail; |
2b1bdf65 KH |
3575 | } |
3576 | else | |
3577 | { | |
2410d73a | 3578 | if (!beforep) |
1138e742 KR |
3579 | before_list = tail; |
3580 | else | |
2410d73a | 3581 | beforep->next = tail; |
1138e742 | 3582 | beforep = tail; |
2b1bdf65 | 3583 | } |
2410d73a SM |
3584 | if (!parent) |
3585 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3586 | else |
2410d73a SM |
3587 | parent->next = tail->next; |
3588 | tail = tail->next; | |
2b1bdf65 KH |
3589 | } |
3590 | else | |
2410d73a | 3591 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3592 | } |
3593 | ||
3594 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3595 | and let the recenter function make it sane again. */ | |
2410d73a | 3596 | if (beforep) |
1138e742 | 3597 | { |
2410d73a | 3598 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3599 | current_buffer->overlays_before = before_list; |
3600 | } | |
c2d5b10f | 3601 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3602 | |
2410d73a | 3603 | if (afterp) |
1138e742 | 3604 | { |
2410d73a | 3605 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3606 | current_buffer->overlays_after = after_list; |
3607 | } | |
c2d5b10f | 3608 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3609 | } |
3b06f880 KH |
3610 | |
3611 | /* We have two types of overlay: the one whose ending marker is | |
3612 | after-insertion-marker (this is the usual case) and the one whose | |
3613 | ending marker is before-insertion-marker. When `overlays_before' | |
3614 | contains overlays of the latter type and the former type in this | |
3615 | order and both overlays end at inserting position, inserting a text | |
3616 | increases only the ending marker of the latter type, which results | |
3617 | in incorrect ordering of `overlays_before'. | |
3618 | ||
3619 | This function fixes ordering of overlays in the slot | |
3620 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3621 | was at PREV, and now is at POS. */ | |
3622 | ||
01136e9b | 3623 | void |
d3da34e0 | 3624 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3625 | { |
2410d73a SM |
3626 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3627 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3628 | Lisp_Object tem; | |
c2d5b10f | 3629 | EMACS_INT end; |
3b06f880 KH |
3630 | |
3631 | /* After the insertion, the several overlays may be in incorrect | |
3632 | order. The possibility is that, in the list `overlays_before', | |
3633 | an overlay which ends at POS appears after an overlay which ends | |
3634 | at PREV. Since POS is greater than PREV, we must fix the | |
3635 | ordering of these overlays, by moving overlays ends at POS before | |
3636 | the overlays ends at PREV. */ | |
3637 | ||
3638 | /* At first, find a place where disordered overlays should be linked | |
3639 | in. It is where an overlay which end before POS exists. (i.e. an | |
3640 | overlay whose ending marker is after-insertion-marker if disorder | |
3641 | exists). */ | |
2410d73a SM |
3642 | while (tail |
3643 | && (XSETMISC (tem, tail), | |
3644 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3645 | { |
3646 | parent = tail; | |
2410d73a | 3647 | tail = tail->next; |
1138e742 | 3648 | } |
3b06f880 KH |
3649 | |
3650 | /* If we don't find such an overlay, | |
3651 | or the found one ends before PREV, | |
3652 | or the found one is the last one in the list, | |
3653 | we don't have to fix anything. */ | |
f93ad4cf | 3654 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3655 | return; |
3656 | ||
1138e742 KR |
3657 | right_pair = parent; |
3658 | parent = tail; | |
2410d73a | 3659 | tail = tail->next; |
3b06f880 | 3660 | |
1138e742 | 3661 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3662 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3663 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3664 | we found an overlay which ends before PREV, the remaining | |
3665 | overlays are in correct order. */ | |
2410d73a | 3666 | while (tail) |
3b06f880 | 3667 | { |
2410d73a SM |
3668 | XSETMISC (tem, tail); |
3669 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3670 | |
3671 | if (end == pos) | |
3672 | { /* This overlay is disordered. */ | |
2410d73a | 3673 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3674 | |
3675 | /* Unlink the found overlay. */ | |
2410d73a SM |
3676 | tail = found->next; |
3677 | parent->next = tail; | |
1138e742 KR |
3678 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3679 | and link it into the right place. */ | |
2410d73a | 3680 | if (!right_pair) |
1138e742 | 3681 | { |
2410d73a | 3682 | found->next = bp->overlays_before; |
1138e742 KR |
3683 | bp->overlays_before = found; |
3684 | } | |
3685 | else | |
3686 | { | |
2410d73a SM |
3687 | found->next = right_pair->next; |
3688 | right_pair->next = found; | |
1138e742 | 3689 | } |
3b06f880 KH |
3690 | } |
3691 | else if (end == prev) | |
1138e742 KR |
3692 | { |
3693 | parent = tail; | |
2410d73a | 3694 | tail = tail->next; |
1138e742 | 3695 | } |
3b06f880 KH |
3696 | else /* No more disordered overlay. */ |
3697 | break; | |
3698 | } | |
3699 | } | |
2eec3b4e | 3700 | \f |
52f8ec73 | 3701 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3702 | doc: /* Return t if OBJECT is an overlay. */) |
3703 | (object) | |
52f8ec73 JB |
3704 | Lisp_Object object; |
3705 | { | |
3706 | return (OVERLAYP (object) ? Qt : Qnil); | |
3707 | } | |
3708 | ||
acac2700 | 3709 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3710 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3711 | If omitted, BUFFER defaults to the current buffer. |
3712 | BEG and END may be integers or markers. | |
a625ee20 RS |
3713 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3714 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3715 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3716 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3717 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3718 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3719 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3720 | Lisp_Object beg, end, buffer; |
acac2700 | 3721 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3722 | { |
3723 | Lisp_Object overlay; | |
5c4f68f1 | 3724 | struct buffer *b; |
2eec3b4e | 3725 | |
5c4f68f1 | 3726 | if (NILP (buffer)) |
67180c6a | 3727 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3728 | else |
b7826503 | 3729 | CHECK_BUFFER (buffer); |
883047b9 JB |
3730 | if (MARKERP (beg) |
3731 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3732 | error ("Marker points into wrong buffer"); | |
3733 | if (MARKERP (end) | |
3734 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3735 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3736 | |
b7826503 PJ |
3737 | CHECK_NUMBER_COERCE_MARKER (beg); |
3738 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3739 | |
883047b9 | 3740 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3741 | { |
c99fc30f KH |
3742 | Lisp_Object temp; |
3743 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3744 | } |
883047b9 JB |
3745 | |
3746 | b = XBUFFER (buffer); | |
3747 | ||
3748 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3749 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3750 | |
acac2700 RS |
3751 | if (!NILP (front_advance)) |
3752 | XMARKER (beg)->insertion_type = 1; | |
3753 | if (!NILP (rear_advance)) | |
3754 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3755 | |
48e2e3ba | 3756 | overlay = allocate_misc (); |
89ca3e1b | 3757 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3758 | XOVERLAY (overlay)->start = beg; |
3759 | XOVERLAY (overlay)->end = end; | |
3760 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3761 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3762 | |
177c0ea7 | 3763 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3764 | end = OVERLAY_END (overlay); |
c2d5b10f | 3765 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3766 | { |
3767 | if (b->overlays_after) | |
3768 | XOVERLAY (overlay)->next = b->overlays_after; | |
3769 | b->overlays_after = XOVERLAY (overlay); | |
3770 | } | |
2eec3b4e | 3771 | else |
2410d73a SM |
3772 | { |
3773 | if (b->overlays_before) | |
3774 | XOVERLAY (overlay)->next = b->overlays_before; | |
3775 | b->overlays_before = XOVERLAY (overlay); | |
3776 | } | |
2eec3b4e RS |
3777 | |
3778 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3779 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3780 | |
b61982dd JB |
3781 | /* We don't need to redisplay the region covered by the overlay, because |
3782 | the overlay has no properties at the moment. */ | |
3783 | ||
2eec3b4e RS |
3784 | return overlay; |
3785 | } | |
876aa27c RS |
3786 | \f |
3787 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3788 | ||
3789 | static void | |
d3da34e0 | 3790 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3791 | { |
876aa27c RS |
3792 | if (start > end) |
3793 | { | |
3794 | int temp = start; | |
26f545d7 GM |
3795 | start = end; |
3796 | end = temp; | |
876aa27c RS |
3797 | } |
3798 | ||
481b5054 | 3799 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3800 | |
876aa27c RS |
3801 | /* If this is a buffer not in the selected window, |
3802 | we must do other windows. */ | |
3803 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3804 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3805 | /* If multiple windows show this buffer, we must do other windows. */ |
3806 | else if (buffer_shared > 1) | |
3807 | windows_or_buffers_changed = 1; | |
18700091 KS |
3808 | /* If we modify an overlay at the end of the buffer, we cannot |
3809 | be sure that window end is still valid. */ | |
3810 | else if (end >= ZV && start <= ZV) | |
3811 | windows_or_buffers_changed = 1; | |
876aa27c | 3812 | |
d8b9150f | 3813 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3814 | } |
2eec3b4e | 3815 | |
018ba359 | 3816 | \f |
d3da34e0 | 3817 | Lisp_Object Fdelete_overlay (Lisp_Object overlay); |
2e34157c | 3818 | |
2410d73a | 3819 | static struct Lisp_Overlay * |
d3da34e0 | 3820 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3821 | { |
3822 | struct Lisp_Overlay *tmp, *prev; | |
3823 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3824 | if (tmp == overlay) | |
3825 | { | |
3826 | if (prev) | |
3827 | prev->next = tmp->next; | |
3828 | else | |
3829 | list = tmp->next; | |
3830 | overlay->next = NULL; | |
3831 | break; | |
3832 | } | |
3833 | return list; | |
3834 | } | |
3835 | ||
5c4f68f1 | 3836 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3837 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3838 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3839 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3840 | buffer. */) |
3841 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3842 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3843 | { |
0a4469c9 RS |
3844 | struct buffer *b, *ob; |
3845 | Lisp_Object obuffer; | |
aed13378 | 3846 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3847 | |
b7826503 | 3848 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3849 | if (NILP (buffer)) |
3850 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3851 | if (NILP (buffer)) |
67180c6a | 3852 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3853 | CHECK_BUFFER (buffer); |
883047b9 JB |
3854 | |
3855 | if (MARKERP (beg) | |
3856 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3857 | error ("Marker points into wrong buffer"); | |
3858 | if (MARKERP (end) | |
3859 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3860 | error ("Marker points into wrong buffer"); | |
3861 | ||
b7826503 PJ |
3862 | CHECK_NUMBER_COERCE_MARKER (beg); |
3863 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3864 | |
9d7608b7 KH |
3865 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3866 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3867 | |
b61982dd JB |
3868 | if (XINT (beg) > XINT (end)) |
3869 | { | |
c99fc30f KH |
3870 | Lisp_Object temp; |
3871 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3872 | } |
3873 | ||
9d7608b7 KH |
3874 | specbind (Qinhibit_quit, Qt); |
3875 | ||
0a4469c9 | 3876 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3877 | b = XBUFFER (buffer); |
8801a864 | 3878 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3879 | |
c82ed728 | 3880 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3881 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3882 | { |
3883 | /* Redisplay where the overlay was. */ | |
3884 | if (!NILP (obuffer)) | |
3885 | { | |
2e34157c RS |
3886 | int o_beg; |
3887 | int o_end; | |
50760c4a | 3888 | |
80509f2f RS |
3889 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3890 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3891 | |
2e34157c | 3892 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3893 | } |
3894 | ||
3895 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3896 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3897 | } |
c82ed728 JB |
3898 | else |
3899 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3900 | { | |
2e34157c | 3901 | int o_beg, o_end; |
c82ed728 | 3902 | |
80509f2f RS |
3903 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3904 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3905 | |
2e34157c RS |
3906 | if (o_beg == XINT (beg)) |
3907 | modify_overlay (b, o_end, XINT (end)); | |
3908 | else if (o_end == XINT (end)) | |
3909 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3910 | else |
3911 | { | |
2e34157c RS |
3912 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3913 | if (XINT (end) > o_end) o_end = XINT (end); | |
3914 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3915 | } |
3916 | } | |
b61982dd | 3917 | |
0a4469c9 RS |
3918 | if (!NILP (obuffer)) |
3919 | { | |
2410d73a SM |
3920 | ob->overlays_before |
3921 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3922 | ob->overlays_after | |
3923 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3924 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3925 | } |
5c4f68f1 JB |
3926 | |
3927 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3928 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3929 | |
177c0ea7 | 3930 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3931 | end = OVERLAY_END (overlay); |
c2d5b10f | 3932 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3933 | { |
8f924df7 KH |
3934 | XOVERLAY (overlay)->next = b->overlays_after; |
3935 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3936 | } |
2eec3b4e | 3937 | else |
2410d73a | 3938 | { |
8f924df7 KH |
3939 | XOVERLAY (overlay)->next = b->overlays_before; |
3940 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3941 | } |
2eec3b4e RS |
3942 | |
3943 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3944 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3945 | |
0a4469c9 | 3946 | return unbind_to (count, overlay); |
2eec3b4e RS |
3947 | } |
3948 | ||
3949 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3950 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3951 | (overlay) | |
5c4f68f1 | 3952 | Lisp_Object overlay; |
2eec3b4e | 3953 | { |
0a4469c9 | 3954 | Lisp_Object buffer; |
5c4f68f1 | 3955 | struct buffer *b; |
aed13378 | 3956 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3957 | |
b7826503 | 3958 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3959 | |
0a4469c9 RS |
3960 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3961 | if (NILP (buffer)) | |
3962 | return Qnil; | |
3963 | ||
3964 | b = XBUFFER (buffer); | |
0a4469c9 | 3965 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3966 | |
2410d73a SM |
3967 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3968 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3969 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3970 | modify_overlay (b, |
8231a9aa RS |
3971 | marker_position (OVERLAY_START (overlay)), |
3972 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3973 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3974 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3975 | ||
e58c389d | 3976 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3977 | display optimizations for the affected buffer, on the basis that |
3978 | these strings may contain newlines. This is easier to do than to | |
3979 | check for that situation during redisplay. */ | |
3980 | if (!windows_or_buffers_changed | |
3981 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3982 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3983 | b->prevent_redisplay_optimizations_p = 1; | |
3984 | ||
0a4469c9 | 3985 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3986 | } |
3987 | \f | |
8ebafa8d JB |
3988 | /* Overlay dissection functions. */ |
3989 | ||
3990 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3991 | doc: /* Return the position at which OVERLAY starts. */) |
3992 | (overlay) | |
8ebafa8d JB |
3993 | Lisp_Object overlay; |
3994 | { | |
b7826503 | 3995 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3996 | |
3997 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3998 | } | |
3999 | ||
4000 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
4001 | doc: /* Return the position at which OVERLAY ends. */) |
4002 | (overlay) | |
8ebafa8d JB |
4003 | Lisp_Object overlay; |
4004 | { | |
b7826503 | 4005 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4006 | |
4007 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4008 | } | |
4009 | ||
4010 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4011 | doc: /* Return the buffer OVERLAY belongs to. |
4012 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 4013 | (overlay) |
8ebafa8d JB |
4014 | Lisp_Object overlay; |
4015 | { | |
b7826503 | 4016 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4017 | |
4018 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4019 | } | |
4020 | ||
4021 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4022 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4023 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
4024 | OVERLAY. */) |
4025 | (overlay) | |
8ebafa8d JB |
4026 | Lisp_Object overlay; |
4027 | { | |
b7826503 | 4028 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4029 | |
48e2e3ba | 4030 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4031 | } |
4032 | ||
4033 | \f | |
2eec3b4e | 4034 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4035 | doc: /* Return a list of the overlays that contain the character at POS. */) |
7ee72033 | 4036 | (pos) |
2eec3b4e RS |
4037 | Lisp_Object pos; |
4038 | { | |
4039 | int noverlays; | |
2eec3b4e RS |
4040 | Lisp_Object *overlay_vec; |
4041 | int len; | |
4042 | Lisp_Object result; | |
4043 | ||
b7826503 | 4044 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4045 | |
4046 | len = 10; | |
a9800ae8 | 4047 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
4048 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
4049 | ||
4050 | /* Put all the overlays we want in a vector in overlay_vec. | |
4051 | Store the length in len. */ | |
2a77a7d7 | 4052 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4053 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
4054 | |
4055 | /* Make a list of them all. */ | |
4056 | result = Flist (noverlays, overlay_vec); | |
4057 | ||
9ac0d9e0 | 4058 | xfree (overlay_vec); |
2eec3b4e RS |
4059 | return result; |
4060 | } | |
4061 | ||
74514898 | 4062 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4063 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4064 | Overlap means that at least one character is contained within the overlay |
4065 | and also contained within the specified region. | |
7723e095 MR |
4066 | Empty overlays are included in the result if they are located at BEG, |
4067 | between BEG and END, or at END provided END denotes the position at the | |
4068 | end of the buffer. */) | |
7ee72033 | 4069 | (beg, end) |
74514898 RS |
4070 | Lisp_Object beg, end; |
4071 | { | |
4072 | int noverlays; | |
4073 | Lisp_Object *overlay_vec; | |
4074 | int len; | |
4075 | Lisp_Object result; | |
4076 | ||
b7826503 PJ |
4077 | CHECK_NUMBER_COERCE_MARKER (beg); |
4078 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4079 | |
4080 | len = 10; | |
4081 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4082 | ||
4083 | /* Put all the overlays we want in a vector in overlay_vec. | |
4084 | Store the length in len. */ | |
4085 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4086 | (int *) 0, (int *) 0); | |
4087 | ||
4088 | /* Make a list of them all. */ | |
4089 | result = Flist (noverlays, overlay_vec); | |
4090 | ||
4091 | xfree (overlay_vec); | |
4092 | return result; | |
4093 | } | |
4094 | ||
2eec3b4e | 4095 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4096 | 1, 1, 0, |
7ee72033 | 4097 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4098 | If there are no overlay boundaries from POS to (point-max), |
4099 | the value is (point-max). */) | |
7ee72033 | 4100 | (pos) |
2eec3b4e RS |
4101 | Lisp_Object pos; |
4102 | { | |
4103 | int noverlays; | |
0f8b27ea | 4104 | EMACS_INT endpos; |
2eec3b4e RS |
4105 | Lisp_Object *overlay_vec; |
4106 | int len; | |
2eec3b4e RS |
4107 | int i; |
4108 | ||
b7826503 | 4109 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4110 | |
4111 | len = 10; | |
4112 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4113 | ||
4114 | /* Put all the overlays we want in a vector in overlay_vec. | |
4115 | Store the length in len. | |
4116 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4117 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4118 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4119 | |
4120 | /* If any of these overlays ends before endpos, | |
4121 | use its ending point instead. */ | |
4122 | for (i = 0; i < noverlays; i++) | |
4123 | { | |
4124 | Lisp_Object oend; | |
0f8b27ea | 4125 | EMACS_INT oendpos; |
2eec3b4e RS |
4126 | |
4127 | oend = OVERLAY_END (overlay_vec[i]); | |
4128 | oendpos = OVERLAY_POSITION (oend); | |
4129 | if (oendpos < endpos) | |
4130 | endpos = oendpos; | |
1ab256cb RM |
4131 | } |
4132 | ||
9ac0d9e0 | 4133 | xfree (overlay_vec); |
2eec3b4e RS |
4134 | return make_number (endpos); |
4135 | } | |
239c932b RS |
4136 | |
4137 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4138 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4139 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4140 | If there are no overlay boundaries from (point-min) to POS, |
4141 | the value is (point-min). */) | |
7ee72033 | 4142 | (pos) |
239c932b RS |
4143 | Lisp_Object pos; |
4144 | { | |
4145 | int noverlays; | |
0f8b27ea | 4146 | EMACS_INT prevpos; |
239c932b RS |
4147 | Lisp_Object *overlay_vec; |
4148 | int len; | |
239c932b | 4149 | |
b7826503 | 4150 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4151 | |
624bbdc4 RS |
4152 | /* At beginning of buffer, we know the answer; |
4153 | avoid bug subtracting 1 below. */ | |
4154 | if (XINT (pos) == BEGV) | |
4155 | return pos; | |
4156 | ||
017f0539 GM |
4157 | len = 10; |
4158 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4159 | ||
239c932b RS |
4160 | /* Put all the overlays we want in a vector in overlay_vec. |
4161 | Store the length in len. | |
daa1c109 | 4162 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4163 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4164 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4165 | |
239c932b RS |
4166 | xfree (overlay_vec); |
4167 | return make_number (prevpos); | |
4168 | } | |
2eec3b4e RS |
4169 | \f |
4170 | /* These functions are for debugging overlays. */ | |
4171 | ||
4172 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4173 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4174 | The car has all the overlays before the overlay center; |
4175 | the cdr has all the overlays after the overlay center. | |
4176 | Recentering overlays moves overlays between these lists. | |
4177 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4178 | However, the overlays you get are the real objects that the buffer uses. */) |
4179 | () | |
2eec3b4e | 4180 | { |
2410d73a SM |
4181 | struct Lisp_Overlay *ol; |
4182 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4183 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4184 | { | |
4185 | XSETMISC (tmp, ol); | |
4186 | before = Fcons (tmp, before); | |
4187 | } | |
4188 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4189 | { | |
4190 | XSETMISC (tmp, ol); | |
4191 | after = Fcons (tmp, after); | |
4192 | } | |
4193 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4194 | } |
4195 | ||
4196 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4197 | doc: /* Recenter the overlays of the current buffer around position POS. |
4198 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4199 | for positions far away from POS). */) | |
7ee72033 | 4200 | (pos) |
2eec3b4e RS |
4201 | Lisp_Object pos; |
4202 | { | |
b7826503 | 4203 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4204 | |
5c4f68f1 | 4205 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4206 | return Qnil; |
4207 | } | |
4208 | \f | |
4209 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4210 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4211 | (overlay, prop) | |
2eec3b4e RS |
4212 | Lisp_Object overlay, prop; |
4213 | { | |
b7826503 | 4214 | CHECK_OVERLAY (overlay); |
9a593927 | 4215 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4216 | } |
4217 | ||
4218 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4219 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4220 | (overlay, prop, value) | |
2eec3b4e RS |
4221 | Lisp_Object overlay, prop, value; |
4222 | { | |
48e2e3ba | 4223 | Lisp_Object tail, buffer; |
9d7608b7 | 4224 | int changed; |
2eec3b4e | 4225 | |
b7826503 | 4226 | CHECK_OVERLAY (overlay); |
b61982dd | 4227 | |
274a9425 RS |
4228 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4229 | ||
48e2e3ba | 4230 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4231 | CONSP (tail) && CONSP (XCDR (tail)); |
4232 | tail = XCDR (XCDR (tail))) | |
4233 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4234 | { |
7539e11f | 4235 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4236 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4237 | goto found; |
274a9425 | 4238 | } |
9d7608b7 KH |
4239 | /* It wasn't in the list, so add it to the front. */ |
4240 | changed = !NILP (value); | |
48e2e3ba KH |
4241 | XOVERLAY (overlay)->plist |
4242 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4243 | found: |
4244 | if (! NILP (buffer)) | |
4245 | { | |
4246 | if (changed) | |
876aa27c | 4247 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4248 | marker_position (OVERLAY_START (overlay)), |
4249 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4250 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4251 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4252 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4253 | Fdelete_overlay (overlay); | |
4254 | } | |
7d63db98 | 4255 | |
2eec3b4e | 4256 | return value; |
1ab256cb RM |
4257 | } |
4258 | \f | |
9115729e KH |
4259 | /* Subroutine of report_overlay_modification. */ |
4260 | ||
4261 | /* Lisp vector holding overlay hook functions to call. | |
4262 | Vector elements come in pairs. | |
4263 | Each even-index element is a list of hook functions. | |
4264 | The following odd-index element is the overlay they came from. | |
4265 | ||
4266 | Before the buffer change, we fill in this vector | |
4267 | as we call overlay hook functions. | |
4268 | After the buffer change, we get the functions to call from this vector. | |
4269 | This way we always call the same functions before and after the change. */ | |
4270 | static Lisp_Object last_overlay_modification_hooks; | |
4271 | ||
4272 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4273 | static int last_overlay_modification_hooks_used; | |
4274 | ||
4275 | /* Add one functionlist/overlay pair | |
4276 | to the end of last_overlay_modification_hooks. */ | |
4277 | ||
4278 | static void | |
d3da34e0 | 4279 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e KH |
4280 | { |
4281 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4282 | ||
4283 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4284 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4285 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4286 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4287 | functionlist); last_overlay_modification_hooks_used++; | |
4288 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4289 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4290 | } |
4291 | \f | |
173f2a64 RS |
4292 | /* Run the modification-hooks of overlays that include |
4293 | any part of the text in START to END. | |
9115729e KH |
4294 | If this change is an insertion, also |
4295 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4296 | and the insert-after-hooks of overlay ending at START. |
4297 | ||
4298 | This is called both before and after the modification. | |
4299 | AFTER is nonzero when we call after the modification. | |
4300 | ||
9115729e KH |
4301 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4302 | When AFTER is nonzero, they are the start position, | |
4303 | the position after the inserted new text, | |
4304 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4305 | |
4306 | void | |
d3da34e0 JB |
4307 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4308 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4309 | { |
2410d73a SM |
4310 | Lisp_Object prop, overlay; |
4311 | struct Lisp_Overlay *tail; | |
9115729e KH |
4312 | /* 1 if this change is an insertion. */ |
4313 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4314 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4315 | |
4316 | overlay = Qnil; | |
2410d73a | 4317 | tail = NULL; |
9115729e | 4318 | |
27c6b98e SM |
4319 | /* We used to run the functions as soon as we found them and only register |
4320 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4321 | case. But running elisp code as we traverse the list of overlays is | |
4322 | painful because the list can be modified by the elisp code so we had to | |
4323 | copy at several places. We now simply do a read-only traversal that | |
4324 | only collects the functions to run and we run them afterwards. It's | |
4325 | simpler, especially since all the code was already there. -stef */ | |
4326 | ||
a615c6dc | 4327 | if (!after) |
173f2a64 | 4328 | { |
a615c6dc SM |
4329 | /* We are being called before a change. |
4330 | Scan the overlays to find the functions to call. */ | |
4331 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4332 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4333 | { |
a615c6dc SM |
4334 | int startpos, endpos; |
4335 | Lisp_Object ostart, oend; | |
4336 | ||
2410d73a | 4337 | XSETMISC (overlay, tail); |
a615c6dc SM |
4338 | |
4339 | ostart = OVERLAY_START (overlay); | |
4340 | oend = OVERLAY_END (overlay); | |
4341 | endpos = OVERLAY_POSITION (oend); | |
4342 | if (XFASTINT (start) > endpos) | |
4343 | break; | |
4344 | startpos = OVERLAY_POSITION (ostart); | |
4345 | if (insertion && (XFASTINT (start) == startpos | |
4346 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4347 | { |
a615c6dc SM |
4348 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4349 | if (!NILP (prop)) | |
4350 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4351 | } |
a615c6dc SM |
4352 | if (insertion && (XFASTINT (start) == endpos |
4353 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4354 | { |
a615c6dc SM |
4355 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4356 | if (!NILP (prop)) | |
4357 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4358 | } |
a615c6dc SM |
4359 | /* Test for intersecting intervals. This does the right thing |
4360 | for both insertion and deletion. */ | |
4361 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4362 | { |
a615c6dc SM |
4363 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4364 | if (!NILP (prop)) | |
4365 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4366 | } |
173f2a64 | 4367 | } |
60ebfdf3 | 4368 | |
2410d73a | 4369 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4370 | { |
a615c6dc SM |
4371 | int startpos, endpos; |
4372 | Lisp_Object ostart, oend; | |
4373 | ||
2410d73a | 4374 | XSETMISC (overlay, tail); |
a615c6dc SM |
4375 | |
4376 | ostart = OVERLAY_START (overlay); | |
4377 | oend = OVERLAY_END (overlay); | |
4378 | startpos = OVERLAY_POSITION (ostart); | |
4379 | endpos = OVERLAY_POSITION (oend); | |
4380 | if (XFASTINT (end) < startpos) | |
4381 | break; | |
4382 | if (insertion && (XFASTINT (start) == startpos | |
4383 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4384 | { |
a615c6dc SM |
4385 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4386 | if (!NILP (prop)) | |
4387 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4388 | } |
a615c6dc SM |
4389 | if (insertion && (XFASTINT (start) == endpos |
4390 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4391 | { |
a615c6dc SM |
4392 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4393 | if (!NILP (prop)) | |
4394 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4395 | } |
a615c6dc SM |
4396 | /* Test for intersecting intervals. This does the right thing |
4397 | for both insertion and deletion. */ | |
4398 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4399 | { |
a615c6dc SM |
4400 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4401 | if (!NILP (prop)) | |
4402 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4403 | } |
173f2a64 RS |
4404 | } |
4405 | } | |
55b48893 | 4406 | |
a615c6dc SM |
4407 | GCPRO4 (overlay, arg1, arg2, arg3); |
4408 | { | |
4409 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4410 | First copy the vector contents, in case some of these hooks | |
4411 | do subsequent modification of the buffer. */ | |
4412 | int size = last_overlay_modification_hooks_used; | |
4413 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4414 | int i; | |
4415 | ||
72af86bd AS |
4416 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4417 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4418 | gcpro1.var = copy; |
4419 | gcpro1.nvars = size; | |
4420 | ||
4421 | for (i = 0; i < size;) | |
4422 | { | |
4423 | Lisp_Object prop, overlay; | |
4424 | prop = copy[i++]; | |
4425 | overlay = copy[i++]; | |
4426 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4427 | } | |
4428 | } | |
55b48893 | 4429 | UNGCPRO; |
173f2a64 RS |
4430 | } |
4431 | ||
4432 | static void | |
d3da34e0 JB |
4433 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4434 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4435 | { |
930a9140 | 4436 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4437 | |
930a9140 | 4438 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4439 | |
6d70a280 | 4440 | while (CONSP (list)) |
173f2a64 | 4441 | { |
930a9140 | 4442 | if (NILP (arg3)) |
6d70a280 | 4443 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4444 | else |
6d70a280 SM |
4445 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4446 | list = XCDR (list); | |
173f2a64 RS |
4447 | } |
4448 | UNGCPRO; | |
4449 | } | |
9d7608b7 KH |
4450 | |
4451 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4452 | property is set. */ | |
4453 | void | |
d3da34e0 | 4454 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4455 | { |
2410d73a SM |
4456 | Lisp_Object overlay, hit_list; |
4457 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4458 | |
4459 | hit_list = Qnil; | |
c2d5b10f | 4460 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4461 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4462 | { |
4463 | int endpos; | |
2410d73a | 4464 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4465 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4466 | if (endpos < pos) | |
4467 | break; | |
4468 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4469 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4470 | hit_list = Fcons (overlay, hit_list); |
4471 | } | |
4472 | else | |
2410d73a | 4473 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4474 | { |
4475 | int startpos; | |
2410d73a | 4476 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4477 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4478 | if (startpos > pos) | |
4479 | break; | |
4480 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4481 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4482 | hit_list = Fcons (overlay, hit_list); |
4483 | } | |
7539e11f KR |
4484 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4485 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4486 | } |
173f2a64 | 4487 | \f |
54dfdeb0 | 4488 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4489 | in the slot with offset OFFSET. */ |
4490 | ||
0fa3ba92 | 4491 | void |
d3da34e0 | 4492 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4493 | { |
ad97b375 | 4494 | Lisp_Object predicate; |
177c0ea7 | 4495 | |
64e16c3c | 4496 | switch (type) |
0fa3ba92 | 4497 | { |
2de9f71c | 4498 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4499 | case Lisp_String: predicate = Qstringp; break; |
4500 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4501 | default: abort (); | |
0fa3ba92 JB |
4502 | } |
4503 | ||
ad97b375 | 4504 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4505 | } |
7c02e886 | 4506 | |
0fa3ba92 | 4507 | \f |
b86af064 GM |
4508 | /*********************************************************************** |
4509 | Allocation with mmap | |
4510 | ***********************************************************************/ | |
4511 | ||
4512 | #ifdef USE_MMAP_FOR_BUFFERS | |
4513 | ||
4514 | #include <sys/types.h> | |
4515 | #include <sys/mman.h> | |
4516 | ||
4517 | #ifndef MAP_ANON | |
4518 | #ifdef MAP_ANONYMOUS | |
4519 | #define MAP_ANON MAP_ANONYMOUS | |
4520 | #else | |
4521 | #define MAP_ANON 0 | |
4522 | #endif | |
4523 | #endif | |
4524 | ||
09dfdf85 GM |
4525 | #ifndef MAP_FAILED |
4526 | #define MAP_FAILED ((void *) -1) | |
4527 | #endif | |
4528 | ||
b86af064 | 4529 | #include <stdio.h> |
b86af064 GM |
4530 | |
4531 | #if MAP_ANON == 0 | |
4532 | #include <fcntl.h> | |
4533 | #endif | |
4534 | ||
4535 | #include "coding.h" | |
4536 | ||
4537 | ||
4538 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4539 | The current implementation lets the system select mapped | |
4540 | addresses; we're not using MAP_FIXED in general, except when | |
4541 | trying to enlarge regions. | |
4542 | ||
4543 | Each mapped region starts with a mmap_region structure, the user | |
4544 | area starts after that structure, aligned to MEM_ALIGN. | |
4545 | ||
4546 | +-----------------------+ | |
4547 | | struct mmap_info + | | |
4548 | | padding | | |
4549 | +-----------------------+ | |
4550 | | user data | | |
4551 | | | | |
4552 | | | | |
4553 | +-----------------------+ */ | |
4554 | ||
4555 | struct mmap_region | |
4556 | { | |
4557 | /* User-specified size. */ | |
4558 | size_t nbytes_specified; | |
177c0ea7 | 4559 | |
b86af064 GM |
4560 | /* Number of bytes mapped */ |
4561 | size_t nbytes_mapped; | |
4562 | ||
4563 | /* Pointer to the location holding the address of the memory | |
4564 | allocated with the mmap'd block. The variable actually points | |
4565 | after this structure. */ | |
4566 | POINTER_TYPE **var; | |
4567 | ||
4568 | /* Next and previous in list of all mmap'd regions. */ | |
4569 | struct mmap_region *next, *prev; | |
4570 | }; | |
4571 | ||
4572 | /* Doubly-linked list of mmap'd regions. */ | |
4573 | ||
4574 | static struct mmap_region *mmap_regions; | |
4575 | ||
4576 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4577 | /dev/zero will be opened on it. */ | |
4578 | ||
4579 | static int mmap_fd; | |
4580 | ||
4581 | /* Temporary storage for mmap_set_vars, see there. */ | |
4582 | ||
4583 | static struct mmap_region *mmap_regions_1; | |
4584 | static int mmap_fd_1; | |
4585 | ||
4586 | /* Page size on this system. */ | |
4587 | ||
4588 | static int mmap_page_size; | |
4589 | ||
4590 | /* 1 means mmap has been intialized. */ | |
4591 | ||
4592 | static int mmap_initialized_p; | |
4593 | ||
4594 | /* Value is X rounded up to the next multiple of N. */ | |
4595 | ||
4596 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4597 | ||
4598 | /* Size of mmap_region structure plus padding. */ | |
4599 | ||
4600 | #define MMAP_REGION_STRUCT_SIZE \ | |
4601 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4602 | ||
4603 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4604 | region, return a pointer to the start of the region. */ | |
4605 | ||
4606 | #define MMAP_REGION(P) \ | |
4607 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4608 | ||
4609 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4610 | to the start of the user-visible part of the region. */ | |
4611 | ||
4612 | #define MMAP_USER_AREA(P) \ | |
4613 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4614 | ||
4615 | #define MEM_ALIGN sizeof (double) | |
4616 | ||
7273faa1 DL |
4617 | /* Predicate returning true if part of the address range [START .. END] |
4618 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4619 | memory mapping. |
4620 | ||
4621 | Default is to conservativly assume the address range is occupied by | |
4622 | something else. This can be overridden by system configuration | |
4623 | files if system-specific means to determine this exists. */ | |
4624 | ||
4625 | #ifndef MMAP_ALLOCATED_P | |
4626 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4627 | #endif | |
4628 | ||
b86af064 GM |
4629 | /* Function prototypes. */ |
4630 | ||
f57e2426 J |
4631 | static int mmap_free_1 (struct mmap_region *); |
4632 | static int mmap_enlarge (struct mmap_region *, int); | |
4633 | static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *); | |
4634 | static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t); | |
4635 | static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t); | |
4636 | static void mmap_free (POINTER_TYPE **ptr); | |
4637 | static void mmap_init (void); | |
b86af064 GM |
4638 | |
4639 | ||
4640 | /* Return a region overlapping address range START...END, or null if | |
4641 | none. END is not including, i.e. the last byte in the range | |
4642 | is at END - 1. */ | |
4643 | ||
4644 | static struct mmap_region * | |
4645 | mmap_find (start, end) | |
4646 | POINTER_TYPE *start, *end; | |
4647 | { | |
4648 | struct mmap_region *r; | |
4649 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4650 | |
b86af064 GM |
4651 | for (r = mmap_regions; r; r = r->next) |
4652 | { | |
4653 | char *rstart = (char *) r; | |
4654 | char *rend = rstart + r->nbytes_mapped; | |
4655 | ||
4656 | if (/* First byte of range, i.e. START, in this region? */ | |
4657 | (s >= rstart && s < rend) | |
4658 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4659 | || (e > rstart && e <= rend) | |
4660 | /* First byte of this region in the range? */ | |
4661 | || (rstart >= s && rstart < e) | |
4662 | /* Last byte of this region in the range? */ | |
4663 | || (rend > s && rend <= e)) | |
4664 | break; | |
4665 | } | |
4666 | ||
4667 | return r; | |
4668 | } | |
4669 | ||
4670 | ||
4671 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4672 | the region. Value is non-zero if successful. */ | |
4673 | ||
4674 | static int | |
4675 | mmap_free_1 (r) | |
4676 | struct mmap_region *r; | |
4677 | { | |
4678 | if (r->next) | |
4679 | r->next->prev = r->prev; | |
4680 | if (r->prev) | |
4681 | r->prev->next = r->next; | |
4682 | else | |
4683 | mmap_regions = r->next; | |
177c0ea7 | 4684 | |
1a15cca0 | 4685 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4686 | { |
4687 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4688 | return 0; | |
4689 | } | |
4690 | ||
4691 | return 1; | |
4692 | } | |
4693 | ||
4694 | ||
4695 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4696 | Value is non-zero if successful. */ | |
4697 | ||
4698 | static int | |
4699 | mmap_enlarge (r, npages) | |
4700 | struct mmap_region *r; | |
4701 | int npages; | |
4702 | { | |
4703 | char *region_end = (char *) r + r->nbytes_mapped; | |
4704 | size_t nbytes; | |
4705 | int success = 0; | |
4706 | ||
4707 | if (npages < 0) | |
4708 | { | |
4709 | /* Unmap pages at the end of the region. */ | |
4710 | nbytes = - npages * mmap_page_size; | |
4711 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4712 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4713 | else | |
4714 | { | |
4715 | r->nbytes_mapped -= nbytes; | |
4716 | success = 1; | |
4717 | } | |
4718 | } | |
4719 | else if (npages > 0) | |
4720 | { | |
b86af064 | 4721 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4722 | |
b86af064 GM |
4723 | /* Try to map additional pages at the end of the region. We |
4724 | cannot do this if the address range is already occupied by | |
4725 | something else because mmap deletes any previous mapping. | |
4726 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4727 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4728 | { |
4729 | POINTER_TYPE *p; | |
177c0ea7 | 4730 | |
b86af064 GM |
4731 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4732 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4733 | if (p == MAP_FAILED) | |
edaa9aed | 4734 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4735 | else if (p != (POINTER_TYPE *) region_end) |
4736 | { | |
4737 | /* Kernels are free to choose a different address. In | |
4738 | that case, unmap what we've mapped above; we have | |
4739 | no use for it. */ | |
4740 | if (munmap (p, nbytes) == -1) | |
4741 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4742 | } | |
4743 | else | |
4744 | { | |
4745 | r->nbytes_mapped += nbytes; | |
4746 | success = 1; | |
4747 | } | |
4748 | } | |
4749 | } | |
4750 | ||
4751 | return success; | |
4752 | } | |
4753 | ||
4754 | ||
4755 | /* Set or reset variables holding references to mapped regions. If | |
4756 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4757 | non-zero, set all variables to the start of the user-areas | |
4758 | of mapped regions. | |
4759 | ||
4760 | This function is called from Fdump_emacs to ensure that the dumped | |
4761 | Emacs doesn't contain references to memory that won't be mapped | |
4762 | when Emacs starts. */ | |
4763 | ||
4764 | void | |
4765 | mmap_set_vars (restore_p) | |
4766 | int restore_p; | |
4767 | { | |
4768 | struct mmap_region *r; | |
4769 | ||
4770 | if (restore_p) | |
4771 | { | |
4772 | mmap_regions = mmap_regions_1; | |
4773 | mmap_fd = mmap_fd_1; | |
4774 | for (r = mmap_regions; r; r = r->next) | |
4775 | *r->var = MMAP_USER_AREA (r); | |
4776 | } | |
4777 | else | |
4778 | { | |
4779 | for (r = mmap_regions; r; r = r->next) | |
4780 | *r->var = NULL; | |
4781 | mmap_regions_1 = mmap_regions; | |
4782 | mmap_regions = NULL; | |
4783 | mmap_fd_1 = mmap_fd; | |
4784 | mmap_fd = -1; | |
4785 | } | |
4786 | } | |
4787 | ||
4788 | ||
4789 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4790 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4791 | address of some variable which will use the data area. | |
4792 | ||
4793 | The allocation of 0 bytes is valid. | |
4794 | ||
4795 | If we can't allocate the necessary memory, set *VAR to null, and | |
4796 | return null. */ | |
4797 | ||
4798 | static POINTER_TYPE * | |
4799 | mmap_alloc (var, nbytes) | |
4800 | POINTER_TYPE **var; | |
4801 | size_t nbytes; | |
4802 | { | |
4803 | void *p; | |
4804 | size_t map; | |
4805 | ||
4806 | mmap_init (); | |
4807 | ||
4808 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4809 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4810 | mmap_fd, 0); | |
177c0ea7 | 4811 | |
b86af064 GM |
4812 | if (p == MAP_FAILED) |
4813 | { | |
4814 | if (errno != ENOMEM) | |
4815 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4816 | p = NULL; | |
4817 | } | |
4818 | else | |
4819 | { | |
4820 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4821 | |
b86af064 GM |
4822 | r->nbytes_specified = nbytes; |
4823 | r->nbytes_mapped = map; | |
4824 | r->var = var; | |
4825 | r->prev = NULL; | |
4826 | r->next = mmap_regions; | |
4827 | if (r->next) | |
4828 | r->next->prev = r; | |
4829 | mmap_regions = r; | |
177c0ea7 | 4830 | |
b86af064 GM |
4831 | p = MMAP_USER_AREA (p); |
4832 | } | |
177c0ea7 | 4833 | |
b86af064 GM |
4834 | return *var = p; |
4835 | } | |
4836 | ||
4837 | ||
4838 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4839 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4840 | and return this value. If more memory cannot be allocated, then | |
4841 | leave *VAR unchanged, and return null. */ | |
4842 | ||
4843 | static POINTER_TYPE * | |
4844 | mmap_realloc (var, nbytes) | |
4845 | POINTER_TYPE **var; | |
4846 | size_t nbytes; | |
4847 | { | |
4848 | POINTER_TYPE *result; | |
177c0ea7 | 4849 | |
b86af064 GM |
4850 | mmap_init (); |
4851 | ||
4852 | if (*var == NULL) | |
4853 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4854 | else if (nbytes == 0) |
b86af064 GM |
4855 | { |
4856 | mmap_free (var); | |
4857 | result = mmap_alloc (var, nbytes); | |
4858 | } | |
4859 | else | |
4860 | { | |
4861 | struct mmap_region *r = MMAP_REGION (*var); | |
4862 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4863 | |
b86af064 GM |
4864 | if (room < nbytes) |
4865 | { | |
4866 | /* Must enlarge. */ | |
4867 | POINTER_TYPE *old_ptr = *var; | |
4868 | ||
4869 | /* Try to map additional pages at the end of the region. | |
4870 | If that fails, allocate a new region, copy data | |
4871 | from the old region, then free it. */ | |
4872 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4873 | / mmap_page_size))) | |
4874 | { | |
4875 | r->nbytes_specified = nbytes; | |
4876 | *var = result = old_ptr; | |
4877 | } | |
4878 | else if (mmap_alloc (var, nbytes)) | |
4879 | { | |
72af86bd | 4880 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4881 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4882 | result = *var; | |
4883 | r = MMAP_REGION (result); | |
4884 | r->nbytes_specified = nbytes; | |
4885 | } | |
4886 | else | |
4887 | { | |
4888 | *var = old_ptr; | |
4889 | result = NULL; | |
4890 | } | |
4891 | } | |
4892 | else if (room - nbytes >= mmap_page_size) | |
4893 | { | |
4894 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4895 | memory back to the system. |
4896 | ||
4897 | The extra parens are to make the division happens first, | |
4898 | on positive values, so we know it will round towards | |
4899 | zero. */ | |
bb63c5c9 | 4900 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4901 | result = *var; |
4902 | r->nbytes_specified = nbytes; | |
4903 | } | |
4904 | else | |
4905 | { | |
4906 | /* Leave it alone. */ | |
4907 | result = *var; | |
4908 | r->nbytes_specified = nbytes; | |
4909 | } | |
4910 | } | |
4911 | ||
4912 | return result; | |
4913 | } | |
4914 | ||
4915 | ||
4916 | /* Free a block of relocatable storage whose data is pointed to by | |
4917 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4918 | ||
4919 | static void | |
4920 | mmap_free (var) | |
4921 | POINTER_TYPE **var; | |
4922 | { | |
4923 | mmap_init (); | |
177c0ea7 | 4924 | |
b86af064 GM |
4925 | if (*var) |
4926 | { | |
4927 | mmap_free_1 (MMAP_REGION (*var)); | |
4928 | *var = NULL; | |
4929 | } | |
4930 | } | |
4931 | ||
4932 | ||
4933 | /* Perform necessary intializations for the use of mmap. */ | |
4934 | ||
4935 | static void | |
4936 | mmap_init () | |
4937 | { | |
4938 | #if MAP_ANON == 0 | |
4939 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4940 | in a dumped Emacs. */ | |
4941 | if (mmap_fd <= 0) | |
4942 | { | |
4943 | /* No anonymous mmap -- we need the file descriptor. */ | |
4944 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4945 | if (mmap_fd == -1) | |
4946 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4947 | } | |
4948 | #endif /* MAP_ANON == 0 */ | |
4949 | ||
4950 | if (mmap_initialized_p) | |
4951 | return; | |
4952 | mmap_initialized_p = 1; | |
177c0ea7 | 4953 | |
b86af064 GM |
4954 | #if MAP_ANON != 0 |
4955 | mmap_fd = -1; | |
4956 | #endif | |
177c0ea7 | 4957 | |
b86af064 GM |
4958 | mmap_page_size = getpagesize (); |
4959 | } | |
4960 | ||
4961 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4962 | ||
4963 | ||
4964 | \f | |
4965 | /*********************************************************************** | |
4966 | Buffer-text Allocation | |
4967 | ***********************************************************************/ | |
4968 | ||
4969 | #ifdef REL_ALLOC | |
f57e2426 J |
4970 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4971 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4972 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4973 | #endif /* REL_ALLOC */ |
4974 | ||
4975 | ||
4976 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4977 | ||
4978 | static void | |
d3da34e0 | 4979 | alloc_buffer_text (struct buffer *b, size_t nbytes) |
b86af064 GM |
4980 | { |
4981 | POINTER_TYPE *p; | |
177c0ea7 | 4982 | |
b86af064 GM |
4983 | BLOCK_INPUT; |
4984 | #if defined USE_MMAP_FOR_BUFFERS | |
4985 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4986 | #elif defined REL_ALLOC | |
4987 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4988 | #else | |
815add84 | 4989 | p = xmalloc (nbytes); |
b86af064 | 4990 | #endif |
177c0ea7 | 4991 | |
b86af064 GM |
4992 | if (p == NULL) |
4993 | { | |
4994 | UNBLOCK_INPUT; | |
4995 | memory_full (); | |
4996 | } | |
4997 | ||
4998 | b->text->beg = (unsigned char *) p; | |
4999 | UNBLOCK_INPUT; | |
5000 | } | |
5001 | ||
5002 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5003 | shrink it. */ | |
5004 | ||
5005 | void | |
5371d722 | 5006 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
5007 | { |
5008 | POINTER_TYPE *p; | |
5009 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
5010 | + delta); | |
5011 | BLOCK_INPUT; | |
5012 | #if defined USE_MMAP_FOR_BUFFERS | |
5013 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5014 | #elif defined REL_ALLOC | |
5015 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5016 | #else | |
5017 | p = xrealloc (b->text->beg, nbytes); | |
5018 | #endif | |
177c0ea7 | 5019 | |
b86af064 GM |
5020 | if (p == NULL) |
5021 | { | |
5022 | UNBLOCK_INPUT; | |
5023 | memory_full (); | |
5024 | } | |
5025 | ||
5026 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
5027 | UNBLOCK_INPUT; | |
5028 | } | |
5029 | ||
5030 | ||
5031 | /* Free buffer B's text buffer. */ | |
5032 | ||
5033 | static void | |
d3da34e0 | 5034 | free_buffer_text (struct buffer *b) |
b86af064 GM |
5035 | { |
5036 | BLOCK_INPUT; | |
5037 | ||
5038 | #if defined USE_MMAP_FOR_BUFFERS | |
5039 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
5040 | #elif defined REL_ALLOC | |
5041 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
5042 | #else | |
5043 | xfree (b->text->beg); | |
5044 | #endif | |
177c0ea7 | 5045 | |
b86af064 GM |
5046 | BUF_BEG_ADDR (b) = NULL; |
5047 | UNBLOCK_INPUT; | |
5048 | } | |
5049 | ||
5050 | ||
5051 | \f | |
5052 | /*********************************************************************** | |
5053 | Initialization | |
5054 | ***********************************************************************/ | |
5055 | ||
dfcf069d | 5056 | void |
d3da34e0 | 5057 | init_buffer_once (void) |
1ab256cb | 5058 | { |
7c02e886 GM |
5059 | int idx; |
5060 | ||
72af86bd | 5061 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 5062 | |
1ab256cb RM |
5063 | /* Make sure all markable slots in buffer_defaults |
5064 | are initialized reasonably, so mark_buffer won't choke. */ | |
5065 | reset_buffer (&buffer_defaults); | |
ce5b453a | 5066 | eassert (EQ (buffer_defaults.name, make_number (0))); |
13de9290 | 5067 | reset_buffer_local_variables (&buffer_defaults, 1); |
ce5b453a | 5068 | eassert (EQ (buffer_local_symbols.name, make_number (0))); |
1ab256cb | 5069 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5070 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5071 | /* Prevent GC from getting confused. */ |
5072 | buffer_defaults.text = &buffer_defaults.own_text; | |
5073 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5074 | BUF_INTERVALS (&buffer_defaults) = 0; |
5075 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5076 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5077 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5078 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5079 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5080 | |
5081 | /* Set up the default values of various buffer slots. */ | |
5082 | /* Must do these before making the first buffer! */ | |
5083 | ||
f532dca0 | 5084 | /* real setup is done in bindings.el */ |
d67b4f80 | 5085 | buffer_defaults.mode_line_format = make_pure_c_string ("%-"); |
045dee35 | 5086 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5087 | buffer_defaults.abbrev_mode = Qnil; |
5088 | buffer_defaults.overwrite_mode = Qnil; | |
5089 | buffer_defaults.case_fold_search = Qt; | |
5090 | buffer_defaults.auto_fill_function = Qnil; | |
5091 | buffer_defaults.selective_display = Qnil; | |
5092 | #ifndef old | |
5093 | buffer_defaults.selective_display_ellipses = Qt; | |
5094 | #endif | |
5095 | buffer_defaults.abbrev_table = Qnil; | |
5096 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5097 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5098 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5099 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5100 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5101 | buffer_defaults.overlays_before = NULL; |
5102 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5103 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5104 | |
8d7a4592 | 5105 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb | 5106 | buffer_defaults.truncate_lines = Qnil; |
0858cd02 | 5107 | buffer_defaults.word_wrap = Qnil; |
1ab256cb | 5108 | buffer_defaults.ctl_arrow = Qt; |
f44e260c | 5109 | buffer_defaults.bidi_display_reordering = Qnil; |
6c0cf218 | 5110 | buffer_defaults.bidi_paragraph_direction = Qnil; |
bb2ec976 | 5111 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5112 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5113 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5114 | |
f7975d07 | 5115 | #ifdef DOS_NT |
0776cb1b | 5116 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5117 | #endif |
a1a17b61 | 5118 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5119 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5120 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5121 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5122 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5123 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5124 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5125 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5126 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5127 | buffer_defaults.left_fringe_width = Qnil; | |
5128 | buffer_defaults.right_fringe_width = Qnil; | |
5129 | buffer_defaults.fringes_outside_margins = Qnil; | |
5130 | buffer_defaults.scroll_bar_width = Qnil; | |
5131 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5132 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5133 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5134 | buffer_defaults.fringe_indicator_alist = Qnil; |
5135 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5136 | buffer_defaults.scroll_up_aggressively = Qnil; |
5137 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5138 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5139 | |
5140 | /* Assign the local-flags to the slots that have default values. | |
5141 | The local flag is a bit that is used in the buffer | |
5142 | to say that it has its own local value for the slot. | |
5143 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5144 | ||
5145 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5146 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5147 | |
5148 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5149 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
aab80822 KH |
5150 | XSETINT (buffer_local_flags.filename, -1); |
5151 | XSETINT (buffer_local_flags.directory, -1); | |
5152 | XSETINT (buffer_local_flags.backed_up, -1); | |
5153 | XSETINT (buffer_local_flags.save_length, -1); | |
5154 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5155 | XSETINT (buffer_local_flags.read_only, -1); | |
5156 | XSETINT (buffer_local_flags.major_mode, -1); | |
5157 | XSETINT (buffer_local_flags.mode_name, -1); | |
5158 | XSETINT (buffer_local_flags.undo_list, -1); | |
5159 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5160 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5161 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5162 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5163 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5164 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5165 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5166 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5167 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5168 | |
7c02e886 GM |
5169 | idx = 1; |
5170 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5171 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5172 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5173 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5174 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5175 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5176 | #ifndef old |
7c02e886 | 5177 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5178 | #endif |
7c02e886 GM |
5179 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5180 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
0858cd02 | 5181 | XSETFASTINT (buffer_local_flags.word_wrap, idx); ++idx; |
7c02e886 GM |
5182 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; |
5183 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5184 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5185 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5186 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5187 | #ifdef DOS_NT |
7c02e886 | 5188 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5189 | /* Make this one a permanent local. */ |
7c02e886 | 5190 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5191 | #endif |
7c02e886 GM |
5192 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5193 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5194 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
f44e260c | 5195 | XSETFASTINT (buffer_local_flags.bidi_display_reordering, idx); ++idx; |
6c0cf218 | 5196 | XSETFASTINT (buffer_local_flags.bidi_paragraph_direction, idx); ++idx; |
177c0ea7 | 5197 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5198 | /* Make this one a permanent local. */ |
7c02e886 | 5199 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5200 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5201 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5202 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5203 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5204 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5205 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5206 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5207 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5208 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5209 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5210 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5211 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5212 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5213 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5214 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5215 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5216 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5217 | |
5218 | /* Need more room? */ | |
7313acd0 | 5219 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5220 | abort (); |
7313acd0 | 5221 | last_per_buffer_idx = idx; |
177c0ea7 | 5222 | |
1ab256cb RM |
5223 | Vbuffer_alist = Qnil; |
5224 | current_buffer = 0; | |
5225 | all_buffers = 0; | |
5226 | ||
f4265f6c | 5227 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5228 | |
d67b4f80 | 5229 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
1ab256cb RM |
5230 | buffer_defaults.major_mode = Qfundamental_mode; |
5231 | ||
d67b4f80 | 5232 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5233 | |
d67b4f80 | 5234 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5235 | |
d67b4f80 | 5236 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5237 | |
d67b4f80 | 5238 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5239 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5240 | |
d67b4f80 | 5241 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5242 | |
1ab256cb | 5243 | /* super-magic invisible buffer */ |
d67b4f80 | 5244 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5245 | Vbuffer_alist = Qnil; |
5246 | ||
d67b4f80 | 5247 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5248 | |
5249 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5250 | } |
5251 | ||
dfcf069d | 5252 | void |
d3da34e0 | 5253 | init_buffer (void) |
1ab256cb | 5254 | { |
2381d133 | 5255 | char *pwd; |
136351b7 | 5256 | Lisp_Object temp; |
b639c9be | 5257 | int len; |
1ab256cb | 5258 | |
b86af064 | 5259 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5260 | { |
5261 | /* When using the ralloc implementation based on mmap(2), buffer | |
5262 | text pointers will have been set to null in the dumped Emacs. | |
5263 | Map new memory. */ | |
5264 | struct buffer *b; | |
177c0ea7 | 5265 | |
93c27ef1 GM |
5266 | for (b = all_buffers; b; b = b->next) |
5267 | if (b->text->beg == NULL) | |
b86af064 | 5268 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5269 | } |
b86af064 | 5270 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5271 | |
1ab256cb | 5272 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5273 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5274 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5275 | |
01537133 | 5276 | pwd = get_current_dir_name (); |
a17b5ed1 | 5277 | |
156bdb41 | 5278 | if (!pwd) |
a17b5ed1 | 5279 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5280 | |
1ab256cb RM |
5281 | /* Maybe this should really use some standard subroutine |
5282 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5283 | len = strlen (pwd); |
5284 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5285 | { |
156bdb41 | 5286 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5287 | pwd = (char *) realloc (pwd, len + 2); |
5288 | if (!pwd) | |
5289 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5290 | pwd[len] = DIRECTORY_SEP; |
5291 | pwd[len + 1] = '\0'; | |
f7975d07 | 5292 | } |
0995fa35 | 5293 | |
01537133 | 5294 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5295 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5296 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5297 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5298 | that ENCODE_FILE correctly gets the original bytes. */ |
5299 | current_buffer->directory | |
5300 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5301 | |
0995fa35 RS |
5302 | /* Add /: to the front of the name |
5303 | if it would otherwise be treated as magic. */ | |
5304 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5305 | if (! NILP (temp) |
5306 | /* If the default dir is just /, TEMP is non-nil | |
5307 | because of the ange-ftp completion handler. | |
5308 | However, it is not necessary to turn / into /:/. | |
5309 | So avoid doing that. */ | |
d5db4077 | 5310 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5311 | current_buffer->directory |
5312 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5313 | ||
136351b7 RS |
5314 | temp = get_minibuffer (0); |
5315 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5316 | |
5317 | free (pwd); | |
1ab256cb RM |
5318 | } |
5319 | ||
d6aa1876 SM |
5320 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5321 | Object stored in the current buffer. address is the address of the slot | |
5322 | in the buffer that is current now. */ | |
5323 | ||
5324 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5325 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5326 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5327 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5328 | VNAME is the name of the buffer slot. |
5329 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5330 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5331 | do { \ | |
5332 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5333 | defvar_per_buffer (&bo_fwd, lname, vname, type, 0); \ | |
5334 | } while (0) | |
d6aa1876 SM |
5335 | |
5336 | static void | |
d3da34e0 JB |
5337 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, char *namestring, |
5338 | Lisp_Object *address, Lisp_Object type, char *doc) | |
d6aa1876 | 5339 | { |
ce5b453a | 5340 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5341 | int offset; |
5342 | ||
ce5b453a | 5343 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5344 | offset = (char *)address - (char *)current_buffer; |
5345 | ||
ce5b453a SM |
5346 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5347 | bo_fwd->offset = offset; | |
5348 | bo_fwd->slottype = type; | |
5349 | sym->redirect = SYMBOL_FORWARDED; | |
5350 | { | |
5351 | /* I tried to do the job without a cast, but it seems impossible. | |
5352 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5353 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5354 | } | |
5355 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5356 | |
5357 | if (PER_BUFFER_IDX (offset) == 0) | |
5358 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5359 | slot of buffer_local_flags */ | |
5360 | abort (); | |
5361 | } | |
5362 | ||
5363 | ||
1ab256cb | 5364 | /* initialize the buffer routines */ |
dfcf069d | 5365 | void |
d3da34e0 | 5366 | syms_of_buffer (void) |
1ab256cb | 5367 | { |
9115729e KH |
5368 | staticpro (&last_overlay_modification_hooks); |
5369 | last_overlay_modification_hooks | |
5370 | = Fmake_vector (make_number (10), Qnil); | |
5371 | ||
1ab256cb RM |
5372 | staticpro (&Vbuffer_defaults); |
5373 | staticpro (&Vbuffer_local_symbols); | |
5374 | staticpro (&Qfundamental_mode); | |
5375 | staticpro (&Qmode_class); | |
5376 | staticpro (&QSFundamental); | |
5377 | staticpro (&Vbuffer_alist); | |
5378 | staticpro (&Qprotected_field); | |
5379 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5380 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5381 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5382 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5383 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5384 | staticpro (&Qoverlayp); |
d67b4f80 | 5385 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5386 | staticpro (&Qevaporate); |
d67b4f80 | 5387 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5388 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5389 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5390 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5391 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5392 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5393 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5394 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5395 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5396 | staticpro (&Qpriority); |
d67b4f80 | 5397 | Qwindow = intern_c_string ("window"); |
5985d248 | 5398 | staticpro (&Qwindow); |
d67b4f80 | 5399 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5400 | staticpro (&Qbefore_string); |
d67b4f80 | 5401 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5402 | staticpro (&Qafter_string); |
d67b4f80 | 5403 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5404 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5405 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5406 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5407 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5408 | staticpro (&Qafter_change_functions); |
2f7a359d | 5409 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5410 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5411 | |
d67b4f80 | 5412 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5413 | staticpro (&Qkill_buffer_query_functions); |
5414 | ||
1ab256cb | 5415 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5416 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5417 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5418 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb RM |
5419 | |
5420 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5421 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5422 | ||
5423 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5424 | &buffer_defaults.mode_line_format, |
5425 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5426 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5427 | |
045dee35 | 5428 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5429 | &buffer_defaults.header_line_format, |
5430 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5431 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5432 | |
7ee72033 MB |
5433 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5434 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5435 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5436 | |
a3bbced0 | 5437 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5438 | &buffer_defaults.extra_line_spacing, |
5439 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5440 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5441 | |
187ccf49 KS |
5442 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5443 | &buffer_defaults.cursor_in_non_selected_windows, | |
5444 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5445 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5446 | ||
1ab256cb | 5447 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5448 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5449 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5450 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5451 | |
5452 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5453 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5454 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5455 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5456 | |
5e2ad10b JB |
5457 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5458 | &buffer_defaults.enable_multibyte_characters, | |
5459 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5460 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5461 | |
5e2ad10b JB |
5462 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5463 | &buffer_defaults.buffer_file_coding_system, | |
5464 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5465 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5466 | |
1ab256cb | 5467 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5468 | &buffer_defaults.truncate_lines, |
5469 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5470 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5471 | |
5472 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5473 | &buffer_defaults.fill_column, |
5474 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5475 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5476 | |
5477 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5478 | &buffer_defaults.left_margin, |
5479 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5480 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5481 | |
5482 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5483 | &buffer_defaults.tab_width, |
23625946 | 5484 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5485 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5486 | |
5487 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5488 | &buffer_defaults.case_fold_search, |
5489 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5490 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5491 | |
f7975d07 | 5492 | #ifdef DOS_NT |
177c0ea7 | 5493 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5494 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5495 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5496 | This is the same as (default-value 'buffer-file-type). |
5497 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5498 | #endif |
5499 | ||
0552666b | 5500 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5501 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5502 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5503 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5504 | |
5505 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5506 | &buffer_defaults.right_margin_cols, |
5507 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5508 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5509 | |
2ad8731a KS |
5510 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5511 | &buffer_defaults.left_fringe_width, | |
5512 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5513 | This is the same as (default-value 'left-fringe-width). */); | |
5514 | ||
5515 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5516 | &buffer_defaults.right_fringe_width, | |
5517 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5518 | This is the same as (default-value 'right-fringe-width). */); | |
5519 | ||
5520 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5521 | &buffer_defaults.fringes_outside_margins, | |
5522 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5523 | This is the same as (default-value 'fringes-outside-margins). */); | |
5524 | ||
5525 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5526 | &buffer_defaults.scroll_bar_width, | |
5527 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5528 | This is the same as (default-value 'scroll-bar-width). */); | |
5529 | ||
5530 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5531 | &buffer_defaults.vertical_scroll_bar_type, | |
5532 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5533 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5534 | ||
0552666b | 5535 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5536 | &buffer_defaults.indicate_empty_lines, |
5537 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5538 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5539 | |
6b61353c KH |
5540 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5541 | &buffer_defaults.indicate_buffer_boundaries, | |
5542 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5543 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5544 | ||
c6a46372 KS |
5545 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5546 | &buffer_defaults.fringe_indicator_alist, | |
5547 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5548 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5549 | ||
5550 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5551 | &buffer_defaults.fringe_cursor_alist, | |
5552 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5553 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5554 | ||
0552666b | 5555 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5556 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5557 | doc: /* Default value of `scroll-up-aggressively'. |
5558 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5559 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5560 | |
0552666b | 5561 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5562 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5563 | doc: /* Default value of `scroll-down-aggressively'. |
5564 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5565 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5566 | |
045dee35 | 5567 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5568 | ¤t_buffer->header_line_format, |
7ee72033 | 5569 | Qnil, |
7614d762 RS |
5570 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5571 | The header line appears, optionally, at the top of a window; | |
5572 | the mode line appears at the bottom. */); | |
177c0ea7 | 5573 | |
1ab256cb | 5574 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5575 | Qnil, |
5576 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5577 | Each buffer has its own value of this variable. |
5578 | Value may be nil, a string, a symbol or a list or cons cell. | |
5579 | A value of nil means don't display a mode line. | |
5580 | For a symbol, its value is used (but it is ignored if t or nil). | |
5581 | A string appearing directly as the value of a symbol is processed verbatim | |
5582 | in that the %-constructs below are not recognized. | |
ed463255 | 5583 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5584 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5585 | in the value of that symbol will be ignored. |
018ba359 | 5586 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5587 | is used as a mode line element. Be careful--FORM should not load any files, |
5588 | because that can cause an infinite recursion. | |
ed463255 KS |
5589 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5590 | with the specified properties PROPS applied. | |
018ba359 PJ |
5591 | For a list whose car is a symbol, the symbol's value is taken, |
5592 | and if that is non-nil, the cadr of the list is processed recursively. | |
5593 | Otherwise, the caddr of the list (if there is one) is processed. | |
5594 | For a list whose car is a string or list, each element is processed | |
5595 | recursively and the results are effectively concatenated. | |
5596 | For a list whose car is an integer, the cdr of the list is processed | |
5597 | and padded (if the number is positive) or truncated (if negative) | |
5598 | to the width specified by that number. | |
5599 | A string is printed verbatim in the mode line except for %-constructs: | |
5600 | (%-constructs are allowed when the string is the entire mode-line-format | |
5601 | or when it is found in a cons-cell or a list) | |
5602 | %b -- print buffer name. %f -- print visited file name. | |
5603 | %F -- print frame name. | |
5604 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5605 | %& is like %*, but ignore read-only-ness. | |
5606 | % means buffer is read-only and * means it is modified. | |
5607 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5608 | %s -- print process status. %l -- print the current line number. | |
5609 | %c -- print the current column number (this makes editing slower). | |
5610 | To make the column number update correctly in all cases, | |
5611 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5612 | %i -- print the size of the buffer. |
5613 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5614 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5615 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5616 | or print Bottom or All. | |
018ba359 | 5617 | %n -- print Narrow if appropriate. |
dafbe726 | 5618 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5619 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5620 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5621 | %e -- print error message about full memory. |
f7165034 NR |
5622 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5623 | remote machine. | |
018ba359 PJ |
5624 | %[ -- print one [ for each recursive editing level. %] similar. |
5625 | %% -- print %. %- -- print infinitely many dashes. | |
5626 | Decimal digits after the % specify field width to which to pad. */); | |
5627 | ||
7ee72033 | 5628 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
5a021dd0 | 5629 | doc: /* *Value of `major-mode' for new buffers. */); |
1ab256cb RM |
5630 | |
5631 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5632 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5633 | doc: /* Symbol for current buffer's major mode. |
5634 | The default value (normally `fundamental-mode') affects new buffers. | |
5635 | A value of nil means to use the current buffer's major mode, provided | |
5636 | it is not marked as "special". | |
5637 | ||
5638 | When a mode is used by default, `find-file' switches to it before it | |
5639 | reads the contents into the buffer and before it finishes setting up | |
5640 | the buffer. Thus, the mode and its hooks should not expect certain | |
5641 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5642 | to be set up. */); | |
1ab256cb RM |
5643 | |
5644 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5645 | Qnil, |
64a7c220 | 5646 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5647 | Usually a string, but can use any of the constructs for `mode-line-format', |
5648 | which see. | |
5649 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5650 | |
d6aa1876 SM |
5651 | DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil, |
5652 | doc: /* Local (mode-specific) abbrev table of current buffer. */); | |
5653 | ||
7ee72033 | 5654 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5655 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5656 | |
5657 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5658 | Qnil, |
efc7e75f | 5659 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5660 | |
5661 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
2de9f71c | 5662 | make_number (LISP_INT_TAG), |
1ac5826d | 5663 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5664 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5665 | |
5666 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
2de9f71c | 5667 | make_number (LISP_INT_TAG), |
fc961256 | 5668 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5669 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5670 | |
5671 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
2de9f71c | 5672 | make_number (LISP_INT_TAG), |
efc7e75f | 5673 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5674 | |
7ee72033 | 5675 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5676 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5677 | A value of nil means use backslash and octal digits. |
5678 | This variable does not apply to characters whose display is specified | |
5679 | in the current display table (if there is one). */); | |
1ab256cb | 5680 | |
3b06f880 | 5681 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5682 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5683 | Qnil, |
efc7e75f | 5684 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5685 | Otherwise they are regarded as unibyte. This affects the display, |
5686 | file I/O and the behavior of various editing commands. | |
5687 | ||
5688 | This variable is buffer-local but you cannot set it directly; | |
5689 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5690 | Changing its default value with `setq-default' is supported. | |
5691 | See also variable `default-enable-multibyte-characters' and Info node | |
5692 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5693 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5694 | |
c71b5d9b | 5695 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5696 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5697 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5698 | This variable applies to saving the buffer, and also to `write-region' |
5699 | and other functions that use `write-region'. | |
5700 | It does not apply to sending output to subprocesses, however. | |
5701 | ||
5702 | If this is nil, the buffer is saved without any code conversion | |
5703 | unless some coding system is specified in `file-coding-system-alist' | |
5704 | for the buffer file. | |
5705 | ||
31a6cb06 EZ |
5706 | If the text to be saved cannot be encoded as specified by this variable, |
5707 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5708 | ||
018ba359 PJ |
5709 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5710 | ||
5711 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5712 | |
f44e260c EZ |
5713 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
5714 | ¤t_buffer->bidi_display_reordering, Qnil, | |
938efb77 | 5715 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5716 | |
6c0cf218 EZ |
5717 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
5718 | ¤t_buffer->bidi_paragraph_direction, Qnil, | |
b44d9321 | 5719 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5720 | |
b44d9321 EZ |
5721 | If this is nil (the default), the direction of each paragraph is |
5722 | determined by the first strong directional character of its text. | |
5723 | The values of `right-to-left' and `left-to-right' override that. | |
5724 | Any other value is treated as nil. | |
b4bf28b7 | 5725 | |
b44d9321 EZ |
5726 | This variable has no effect unless the buffer's value of |
5727 | \`bidi-display-reordering' is non-nil. */); | |
5728 | ||
b7b65b15 | 5729 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5730 | doc: /* *Non-nil means do not display continuation lines. |
5731 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5732 | |
5733 | Note that this is overridden by the variable | |
5734 | `truncate-partial-width-windows' if that variable is non-nil | |
5735 | and this buffer is not full-frame width. */); | |
1ab256cb | 5736 | |
0858cd02 CY |
5737 | DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer->word_wrap, Qnil, |
5738 | doc: /* *Non-nil means to use word-wrapping for continuation lines. | |
5739 | When word-wrapping is on, continuation lines are wrapped at the space | |
5740 | or tab character nearest to the right window edge. | |
5741 | If nil, continuation lines are wrapped at the right screen edge. | |
5742 | ||
5743 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5744 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5745 | word-wrapping, you might want to reduce the value of | |
5746 | `truncate-partial-width-windows', since wrapping can make text readable | |
5747 | in narrower windows. */); | |
0858cd02 | 5748 | |
f7975d07 | 5749 | #ifdef DOS_NT |
54ad07d3 | 5750 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5751 | Qnil, |
efc7e75f | 5752 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5753 | This variable is meaningful on MS-DOG and Windows NT. |
5754 | On those systems, it is automatically local in every buffer. | |
5755 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5756 | #endif |
5757 | ||
1ab256cb | 5758 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5759 | make_number (Lisp_String), |
efc7e75f | 5760 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5761 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5762 | |
5763 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5764 | Qnil, |
efc7e75f | 5765 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5766 | It is called after self-inserting any character specified in |
5767 | the `auto-fill-chars' table. | |
5768 | NOTE: This variable is not a hook; | |
5769 | its value may not be a list of functions. */); | |
1ab256cb RM |
5770 | |
5771 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5772 | make_number (Lisp_String), |
efc7e75f | 5773 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5774 | |
f6ed2e84 | 5775 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5776 | make_number (Lisp_String), |
efc7e75f | 5777 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5778 | The truename of a file is calculated by `file-truename' |
5779 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5780 | |
1ab256cb | 5781 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5782 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5783 | make_number (Lisp_String), |
7614d762 RS |
5784 | doc: /* Name of file for auto-saving current buffer. |
5785 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5786 | |
7ee72033 | 5787 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5788 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5789 | |
7ee72033 | 5790 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5791 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5792 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5793 | |
5794 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
2de9f71c | 5795 | make_number (LISP_INT_TAG), |
efc7e75f | 5796 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5797 | 0 initially. |
5798 | -1 means auto-saving turned off until next real save. | |
5799 | ||
5800 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5801 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5802 | you probably should set this to -2 in that buffer. */); | |
1ab256cb RM |
5803 | |
5804 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5805 | Qnil, |
7614d762 | 5806 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5807 | An integer N as value means display only lines |
5808 | that start with less than N columns of space. | |
7614d762 RS |
5809 | A value of t means that the character ^M makes itself and |
5810 | all the rest of the line invisible; also, when saving the buffer | |
5811 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5812 | |
5813 | #ifndef old | |
5814 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
d765e3a3 | 5815 | ¤t_buffer->selective_display_ellipses, |
7ee72033 | 5816 | Qnil, |
3f676284 | 5817 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5818 | #endif |
5819 | ||
7ee72033 | 5820 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5821 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5822 | The value should be one of `overwrite-mode-textual', |
5823 | `overwrite-mode-binary', or nil. | |
5824 | If it is `overwrite-mode-textual', self-insertion still | |
5825 | inserts at the end of a line, and inserts when point is before a tab, | |
5826 | until the tab is filled in. | |
5827 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5828 | ||
54939090 | 5829 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5830 | Qnil, |
efc7e75f | 5831 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5832 | |
5833 | If this variable is nil, the value of `standard-display-table' is used. | |
5834 | Each window can have its own, overriding display table, see | |
5835 | `set-window-display-table' and `window-display-table'. | |
5836 | ||
5837 | The display table is a char-table created with `make-display-table'. | |
5838 | A char-table is an array indexed by character codes. Normal array | |
5839 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5840 | ||
5841 | Each of the char-table elements control how to display the corresponding | |
5842 | text character: the element at index C in the table says how to display | |
5843 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5844 | characters or nil. The value nil means display the character in the |
5845 | default fashion; otherwise, the characters from the vector are delivered | |
5846 | to the screen instead of the original character. | |
018ba359 | 5847 | |
5fd11dc8 | 5848 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5849 | to display a capital Y instead of each X character. |
018ba359 PJ |
5850 | |
5851 | In addition, a char-table has six extra slots to control the display of: | |
5852 | ||
5853 | the end of a truncated screen line (extra-slot 0, a single character); | |
5854 | the end of a continued line (extra-slot 1, a single character); | |
5855 | the escape character used to display character codes in octal | |
5856 | (extra-slot 2, a single character); | |
5857 | the character used as an arrow for control characters (extra-slot 3, | |
5858 | a single character); | |
5859 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5860 | a vector of characters); | |
5861 | the character used to draw the border between side-by-side windows | |
5862 | (extra-slot 5, a single character). | |
5863 | ||
5864 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5865 | |
2ad8731a | 5866 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5867 | Qnil, |
efc7e75f | 5868 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5869 | A value of nil means no marginal area. */); |
177c0ea7 | 5870 | |
2ad8731a | 5871 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5872 | Qnil, |
efc7e75f | 5873 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5874 | A value of nil means no marginal area. */); |
177c0ea7 | 5875 | |
2ad8731a KS |
5876 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5877 | Qnil, | |
5878 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5879 | A value of 0 means no left fringe is shown in this buffer's window. | |
5880 | A value of nil means to use the left fringe width from the window's frame. */); | |
5881 | ||
5882 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5883 | Qnil, | |
5884 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5885 | A value of 0 means no right fringe is shown in this buffer's window. | |
5886 | A value of nil means to use the right fringe width from the window's frame. */); | |
5887 | ||
5888 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5889 | Qnil, | |
5890 | doc: /* *Non-nil means to display fringes outside display margins. | |
5891 | A value of nil means to display fringes between margins and buffer text. */); | |
5892 | ||
5893 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5894 | Qnil, | |
5895 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5896 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5897 | ||
5898 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5899 | Qnil, | |
5900 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5901 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5902 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5903 | |
fc2c8887 RS |
5904 | A value of `left' or `right' means put the vertical scroll bar at that side |
5905 | of the window; a value of nil means don't show any vertical scroll bars. | |
5906 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5907 | |
0552666b | 5908 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5909 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5910 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5911 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5912 | window-systems. */); | |
177c0ea7 | 5913 | |
6b61353c KH |
5914 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5915 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5916 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
5917 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5918 | of a window on window-systems with angle bitmaps, or if the window can be | |
5919 | scrolled, the top and bottom line of the window are marked with up and down | |
5920 | arrow bitmaps. | |
b2229037 KS |
5921 | |
5922 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5923 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5924 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5925 | the left fringe but no arrows. |
b2229037 | 5926 | |
79e3497d RS |
5927 | You can exercise more precise control by using an alist as the |
5928 | value. Each alist element (INDICATOR . POSITION) specifies | |
5929 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5930 | `bottom', `up', `down', or t, which specifies the default position, |
5931 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5932 | this indicator. | |
5933 | ||
5934 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5935 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5936 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5937 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5938 | |
c6a46372 KS |
5939 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5940 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5941 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5942 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5943 | specifies the fringe bitmaps used to display a specific logical | |
5944 | fringe indicator. | |
5945 | ||
5946 | INDICATOR specifies the logical indicator type which is one of the | |
5947 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
5948 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
5949 | ||
5950 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
5951 | the actual bitmap shown in the left or right fringe for the logical | |
5952 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5953 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
5954 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 5955 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
5956 | symbol which is used in both left and right fringes. */); |
5957 | ||
5958 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5959 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5960 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5961 | The value is an alist where each element (CURSOR . BITMAP) | |
5962 | specifies the fringe bitmaps used to display a specific logical | |
5963 | cursor type in the fringe. | |
5964 | ||
5965 | CURSOR specifies the logical cursor type which is one of the following | |
5966 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5967 | one is used to show a hollow cursor on narrow lines display lines | |
5968 | where the normal hollow cursor will not fit. | |
5969 | ||
5970 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5971 | cursor type. */); | |
5972 | ||
0552666b | 5973 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5974 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5975 | doc: /* How far to scroll windows upward. |
5976 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5977 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5978 | means scroll to center point. A fraction means scroll to put point |
5979 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5980 | When the value is 0.0, point goes at the bottom line, which in the |
5981 | simple case that you moved off with C-f means scrolling just one line. | |
5982 | 1.0 means point goes at the top, so that in that simple case, the | |
5983 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5984 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5985 | |
0552666b | 5986 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5987 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5988 | doc: /* How far to scroll windows downward. |
5989 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5990 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5991 | means scroll to center point. A fraction means scroll to put point |
5992 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5993 | When the value is 0.0, point goes at the top line, which in the |
5994 | simple case that you moved off with C-b means scrolling just one line. | |
5995 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5996 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5997 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5998 | |
1ab256cb RM |
5999 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
6000 | "Don't ask."); | |
6001 | */ | |
1ab256cb | 6002 | |
7ee72033 MB |
6003 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
6004 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
6005 | Two arguments are passed to each function: the positions of |
6006 | the beginning and end of the range of old text to be changed. | |
6007 | \(For an insertion, the beginning and end are at the same place.) | |
6008 | No information is given about the length of the text after the change. | |
6009 | ||
6010 | Buffer changes made while executing the `before-change-functions' | |
6011 | don't call any before-change or after-change functions. | |
6012 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
6013 | As a result, a hook function cannot straightforwardly alter the |
6014 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
6015 | accomplishing an equivalent result by using other variables. |
6016 | ||
6017 | If an unhandled error happens in running these functions, | |
6018 | the variable's value remains nil. That prevents the error | |
6019 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6020 | Vbefore_change_functions = Qnil; |
6021 | ||
7ee72033 | 6022 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 6023 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6024 | Three arguments are passed to each function: the positions of |
6025 | the beginning and end of the range of changed text, | |
6026 | and the length in bytes of the pre-change text replaced by that range. | |
6027 | \(For an insertion, the pre-change length is zero; | |
6028 | for a deletion, that length is the number of bytes deleted, | |
6029 | and the post-change beginning and end are at the same place.) | |
6030 | ||
6031 | Buffer changes made while executing the `after-change-functions' | |
6032 | don't call any before-change or after-change functions. | |
6033 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
6034 | As a result, a hook function cannot straightforwardly alter the |
6035 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
6036 | accomplishing an equivalent result by using other variables. |
6037 | ||
6038 | If an unhandled error happens in running these functions, | |
6039 | the variable's value remains nil. That prevents the error | |
6040 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6041 | Vafter_change_functions = Qnil; |
6042 | ||
7ee72033 | 6043 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 6044 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6045 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6046 | Vfirst_change_hook = Qnil; |
1ab256cb | 6047 | |
7ee72033 MB |
6048 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
6049 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
6050 | Recent changes come first; older changes follow newer. |
6051 | ||
6052 | An entry (BEG . END) represents an insertion which begins at | |
6053 | position BEG and ends at position END. | |
6054 | ||
6055 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6056 | from (abs POSITION). If POSITION is positive, point was at the front | |
6057 | of the text being deleted; if negative, point was at the end. | |
6058 | ||
6059 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
6060 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
6061 | of the visited file's modification time, as of that time. If the | |
6062 | modification time of the most recent save is different, this entry is | |
6063 | obsolete. | |
6064 | ||
6065 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6066 | was modified between BEG and END. PROPERTY is the property name, | |
6067 | and VALUE is the old value. | |
6068 | ||
7405f386 KS |
6069 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6070 | \(apply FUN-NAME ARGS). | |
6071 | ||
6072 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6073 | in the active region. BEG and END is the range affected by this entry | |
6074 | and DELTA is the number of bytes added or deleted in that range by | |
6075 | this change. | |
c6c7dc03 | 6076 | |
018ba359 PJ |
6077 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6078 | was adjusted in position by the offset DISTANCE (an integer). | |
6079 | ||
6080 | An entry of the form POSITION indicates that point was at the buffer | |
6081 | location given by the integer. Undoing an entry of this form places | |
6082 | point at POSITION. | |
6083 | ||
b4c4f2f4 JB |
6084 | Entries with value `nil' mark undo boundaries. The undo command treats |
6085 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6086 | |
6087 | If the value of the variable is t, undo information is not recorded. */); | |
6088 | ||
7ee72033 MB |
6089 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
6090 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 6091 | |
7ee72033 MB |
6092 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
6093 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
6094 | |
6095 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6096 | newlines. Columnar operations (like `move-to-column' and |
6097 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6098 | widths as they go. This works well for ordinary text, but if the |
6099 | buffer's lines are very long (say, more than 500 characters), these | |
6100 | motion functions will take longer to execute. Emacs may also take | |
6101 | longer to update the display. | |
6102 | ||
5629f29b | 6103 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6104 | results of their scans, and consult the cache to avoid rescanning |
6105 | regions of the buffer until the text is modified. The caches are most | |
6106 | beneficial when they prevent the most searching---that is, when the | |
6107 | buffer contains long lines and large regions of characters with the | |
6108 | same, fixed screen width. | |
6109 | ||
5629f29b | 6110 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6111 | become slightly slower (because of the overhead of consulting the |
6112 | cache), and the caches will use memory roughly proportional to the | |
6113 | number of newlines and characters whose screen width varies. | |
6114 | ||
6115 | The caches require no explicit maintenance; their accuracy is | |
6116 | maintained internally by the Emacs primitives. Enabling or disabling | |
6117 | the cache should not affect the behavior of any of the motion | |
6118 | functions; it should only affect their performance. */); | |
6119 | ||
7ee72033 MB |
6120 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
6121 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 6122 | |
7ee72033 MB |
6123 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
6124 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 6125 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6126 | set when a file is visited. */); |
be9aafdd | 6127 | |
71ed49fa LT |
6128 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
6129 | ¤t_buffer->auto_save_file_format, Qnil, | |
6130 | doc: /* *Format in which to write auto-save files. | |
6131 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6132 | If it is t, which is the default, auto-save files are written in the | |
6133 | same format as a regular save would use. */); | |
6134 | ||
3cb719bd | 6135 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6136 | ¤t_buffer->invisibility_spec, Qnil, |
6137 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6138 | The default is t, which means that text is invisible |
6139 | if it has a non-nil `invisible' property. | |
6140 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6141 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6142 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6143 | then characters with property value PROP are invisible, | |
6144 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6145 | |
7962a441 | 6146 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6147 | ¤t_buffer->display_count, Qnil, |
6148 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6149 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6150 | |
6151 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6152 | ¤t_buffer->display_time, Qnil, |
6153 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6154 | The function `set-window-buffer' updates this variable |
6155 | to the value obtained by calling `current-time'. | |
6156 | If the buffer has never been shown in a window, the value is nil. */); | |
6157 | ||
7ee72033 | 6158 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
526c9df9 | 6159 | doc: /* */); |
c48f61ef | 6160 | Vtransient_mark_mode = Qnil; |
526c9df9 CY |
6161 | /* The docstring is in simple.el. If we put it here, it would be |
6162 | overwritten when transient-mark-mode is defined using | |
6163 | define-minor-mode. */ | |
c48f61ef | 6164 | |
7ee72033 MB |
6165 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6166 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6167 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6168 | text properties. If the value is a list, disregard `buffer-read-only' | |
6169 | and disregard a `read-only' text property if the property value | |
6170 | is a member of the list. */); | |
a96b68f1 RS |
6171 | Vinhibit_read_only = Qnil; |
6172 | ||
7ee72033 | 6173 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6174 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6175 | Values are interpreted as follows: |
6176 | ||
b8dc613f JB |
6177 | t use the cursor specified for the frame |
6178 | nil don't display a cursor | |
6179 | box display a filled box cursor | |
6180 | hollow display a hollow box cursor | |
6181 | bar display a vertical bar cursor with default width | |
6182 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6183 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6184 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6185 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6186 | |
e08b1705 MR |
6187 | When the buffer is displayed in a non-selected window, the |
6188 | cursor's appearance is instead controlled by the variable | |
6189 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6190 | |
a3bbced0 | 6191 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6192 | ¤t_buffer->extra_line_spacing, Qnil, |
6193 | doc: /* Additional space to put between lines when displaying a buffer. | |
3ba010e5 EZ |
6194 | The space is measured in pixels, and put below lines on graphic displays, |
6195 | see `display-graphic-p'. | |
60ebfdf3 | 6196 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6197 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6198 | |
0124c5bd | 6199 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6200 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6201 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6202 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6203 | |
7ee72033 | 6204 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6205 | doc: /* List of functions called with no args to query before killing a buffer. |
6206 | The buffer being killed will be current while the functions are running. | |
6207 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6208 | Vkill_buffer_query_functions = Qnil; |
6209 | ||
43ed3b8d CY |
6210 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6211 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6212 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6213 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6214 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6215 | staticpro (&Qchange_major_mode_hook); |
6216 | ||
0dc88e60 | 6217 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6218 | defsubr (&Sbuffer_list); |
6219 | defsubr (&Sget_buffer); | |
6220 | defsubr (&Sget_file_buffer); | |
6221 | defsubr (&Sget_buffer_create); | |
336cd056 | 6222 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6223 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6224 | defsubr (&Sbuffer_name); |
6225 | /*defsubr (&Sbuffer_number);*/ | |
6226 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6227 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6228 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6229 | defsubr (&Sbuffer_local_variables); |
6230 | defsubr (&Sbuffer_modified_p); | |
6231 | defsubr (&Sset_buffer_modified_p); | |
6232 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6233 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6234 | defsubr (&Srename_buffer); |
6235 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6236 | defsubr (&Sbuffer_enable_undo); |
6237 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6238 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6239 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6240 | defsubr (&Scurrent_buffer); |
6241 | defsubr (&Sset_buffer); | |
6242 | defsubr (&Sbarf_if_buffer_read_only); | |
6243 | defsubr (&Sbury_buffer); | |
3ac81adb | 6244 | defsubr (&Serase_buffer); |
13cda5f9 | 6245 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6246 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6247 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6248 | |
52f8ec73 | 6249 | defsubr (&Soverlayp); |
2eec3b4e RS |
6250 | defsubr (&Smake_overlay); |
6251 | defsubr (&Sdelete_overlay); | |
6252 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6253 | defsubr (&Soverlay_start); |
6254 | defsubr (&Soverlay_end); | |
6255 | defsubr (&Soverlay_buffer); | |
6256 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6257 | defsubr (&Soverlays_at); |
74514898 | 6258 | defsubr (&Soverlays_in); |
2eec3b4e | 6259 | defsubr (&Snext_overlay_change); |
239c932b | 6260 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6261 | defsubr (&Soverlay_recenter); |
6262 | defsubr (&Soverlay_lists); | |
6263 | defsubr (&Soverlay_get); | |
6264 | defsubr (&Soverlay_put); | |
a8c21b48 | 6265 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6266 | } |
6267 | ||
dfcf069d | 6268 | void |
d3da34e0 | 6269 | keys_of_buffer (void) |
1ab256cb RM |
6270 | { |
6271 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6272 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6273 | |
6274 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6275 | initialized when that function gets called. */ | |
d67b4f80 | 6276 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6277 | } |
6b61353c KH |
6278 | |
6279 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6280 | (do not change this comment) */ |