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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 | |
2538fae4 | 31 | #ifndef USE_CRT_DLL |
9dde47f5 | 32 | extern int errno; |
2538fae4 | 33 | #endif |
1ab256cb | 34 | |
1ab256cb | 35 | |
dfcf069d AS |
36 | #ifdef HAVE_UNISTD_H |
37 | #include <unistd.h> | |
38 | #endif | |
7ee72033 | 39 | |
1ab256cb | 40 | #include "lisp.h" |
21cf4cf8 | 41 | #include "intervals.h" |
1ab256cb RM |
42 | #include "window.h" |
43 | #include "commands.h" | |
44 | #include "buffer.h" | |
8f348ed5 | 45 | #include "character.h" |
28e969dd | 46 | #include "region-cache.h" |
1ab256cb | 47 | #include "indent.h" |
d014bf88 | 48 | #include "blockinput.h" |
2538fae4 | 49 | #include "keyboard.h" |
e35f6ff7 | 50 | #include "keymap.h" |
08460cd4 | 51 | #include "frame.h" |
1ab256cb RM |
52 | |
53 | struct buffer *current_buffer; /* the current buffer */ | |
54 | ||
55 | /* First buffer in chain of all buffers (in reverse order of creation). | |
56 | Threaded through ->next. */ | |
57 | ||
58 | struct buffer *all_buffers; | |
59 | ||
60 | /* This structure holds the default values of the buffer-local variables | |
61 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
62 | The default value occupies the same slot in this structure | |
63 | as an individual buffer's value occupies in that buffer. | |
64 | Setting the default value also goes through the alist of buffers | |
65 | and stores into each buffer that does not say it has a local value. */ | |
66 | ||
6b61353c | 67 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
68 | |
69 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
70 | ||
71 | static Lisp_Object Vbuffer_defaults; | |
72 | ||
73 | /* This structure marks which slots in a buffer have corresponding | |
74 | default values in buffer_defaults. | |
75 | Each such slot has a nonzero value in this structure. | |
76 | The value has only one nonzero bit. | |
77 | ||
78 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
79 | the entry for that slot (found in the same slot in this structure) |
80 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
81 | |
82 | If a slot in this structure is -1, then even though there may | |
83 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
84 | and the corresponding slot in buffer_defaults is not used. | |
85 | ||
86 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
87 | but there is a default value which is copied into each buffer. | |
88 | ||
1ab256cb RM |
89 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
90 | zero, that is a bug */ | |
91 | ||
92 | struct buffer buffer_local_flags; | |
93 | ||
94 | /* This structure holds the names of symbols whose values may be | |
95 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
96 | ||
6b61353c KH |
97 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
98 | ||
1ab256cb RM |
99 | /* A Lisp_Object pointer to the above, used for staticpro */ |
100 | static Lisp_Object Vbuffer_local_symbols; | |
101 | ||
13de9290 RS |
102 | /* Flags indicating which built-in buffer-local variables |
103 | are permanent locals. */ | |
7313acd0 | 104 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
105 | |
106 | /* Number of per-buffer variables used. */ | |
107 | ||
7313acd0 | 108 | int last_per_buffer_idx; |
13de9290 | 109 | |
3709505e SM |
110 | EXFUN (Fset_buffer, 1); |
111 | void set_buffer_internal P_ ((struct buffer *b)); | |
112 | void set_buffer_internal_1 P_ ((struct buffer *b)); | |
113 | static void call_overlay_mod_hooks P_ ((Lisp_Object list, Lisp_Object overlay, | |
114 | int after, Lisp_Object arg1, | |
115 | Lisp_Object arg2, Lisp_Object arg3)); | |
116 | static void swap_out_buffer_local_variables P_ ((struct buffer *b)); | |
117 | static void reset_buffer_local_variables P_ ((struct buffer *b, int permanent_too)); | |
1ab256cb RM |
118 | |
119 | /* Alist of all buffer names vs the buffers. */ | |
120 | /* This used to be a variable, but is no longer, | |
121 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
122 | Lisp_Object Vbuffer_alist; | |
123 | ||
124 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
125 | Lisp_Object Vbefore_change_functions; |
126 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 127 | |
c48f61ef RS |
128 | Lisp_Object Vtransient_mark_mode; |
129 | ||
a96b68f1 RS |
130 | /* t means ignore all read-only text properties. |
131 | A list means ignore such a property if its value is a member of the list. | |
132 | Any non-nil value means ignore buffer-read-only. */ | |
133 | Lisp_Object Vinhibit_read_only; | |
134 | ||
dcdffbf6 RS |
135 | /* List of functions to call that can query about killing a buffer. |
136 | If any of these functions returns nil, we don't kill it. */ | |
137 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 138 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 139 | |
43ed3b8d CY |
140 | /* Hook run before changing a major mode. */ |
141 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
142 | ||
dbc4e1c1 JB |
143 | /* List of functions to call before changing an unmodified buffer. */ |
144 | Lisp_Object Vfirst_change_hook; | |
22378665 | 145 | |
dbc4e1c1 | 146 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
147 | Lisp_Object Qbefore_change_functions; |
148 | Lisp_Object Qafter_change_functions; | |
48265e61 | 149 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 150 | |
7775635d KH |
151 | /* If nonzero, all modification hooks are suppressed. */ |
152 | int inhibit_modification_hooks; | |
153 | ||
1ab256cb | 154 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
2f7a359d | 155 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
156 | |
157 | Lisp_Object Qprotected_field; | |
158 | ||
159 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
160 | ||
161 | Lisp_Object Qkill_buffer_hook; | |
162 | ||
5fe0b67e RS |
163 | Lisp_Object Qget_file_buffer; |
164 | ||
52f8ec73 JB |
165 | Lisp_Object Qoverlayp; |
166 | ||
bbbe9545 | 167 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 168 | |
294d215f RS |
169 | Lisp_Object Qmodification_hooks; |
170 | Lisp_Object Qinsert_in_front_hooks; | |
171 | Lisp_Object Qinsert_behind_hooks; | |
172 | ||
b86af064 GM |
173 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
174 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 175 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 176 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
e1688f54 | 177 | static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); |
b86af064 | 178 | |
cab1603f | 179 | extern char * emacs_strerror P_ ((int)); |
b86af064 | 180 | |
1ab256cb RM |
181 | /* For debugging; temporary. See set_buffer_internal. */ |
182 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
183 | ||
01136e9b | 184 | void |
1ab256cb RM |
185 | nsberror (spec) |
186 | Lisp_Object spec; | |
187 | { | |
a7a60ce9 | 188 | if (STRINGP (spec)) |
d5db4077 | 189 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
190 | error ("Invalid buffer argument"); |
191 | } | |
192 | \f | |
0dc88e60 | 193 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
194 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
195 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
196 | (object) | |
0dc88e60 RS |
197 | Lisp_Object object; |
198 | { | |
199 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
200 | ? Qt : Qnil); | |
201 | } | |
202 | ||
08460cd4 | 203 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 204 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
205 | If the optional arg FRAME is a frame, we return the buffer list |
206 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
207 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 208 | (frame) |
08460cd4 | 209 | Lisp_Object frame; |
1ab256cb | 210 | { |
a18b8cb5 | 211 | Lisp_Object general; |
08460cd4 RS |
212 | general = Fmapcar (Qcdr, Vbuffer_alist); |
213 | ||
214 | if (FRAMEP (frame)) | |
215 | { | |
a18b8cb5 KL |
216 | Lisp_Object framelist, prevlist, tail; |
217 | Lisp_Object args[3]; | |
08460cd4 | 218 | |
b7826503 | 219 | CHECK_FRAME (frame); |
08460cd4 RS |
220 | |
221 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 222 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 223 | |
a18b8cb5 KL |
224 | /* Remove from GENERAL any buffer that duplicates one in |
225 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 226 | tail = framelist; |
a18b8cb5 | 227 | while (CONSP (tail)) |
08460cd4 | 228 | { |
7539e11f KR |
229 | general = Fdelq (XCAR (tail), general); |
230 | tail = XCDR (tail); | |
08460cd4 | 231 | } |
a18b8cb5 KL |
232 | tail = prevlist; |
233 | while (CONSP (tail)) | |
234 | { | |
235 | general = Fdelq (XCAR (tail), general); | |
236 | tail = XCDR (tail); | |
237 | } | |
238 | ||
239 | args[0] = framelist; | |
240 | args[1] = general; | |
241 | args[2] = prevlist; | |
242 | return Fnconc (3, args); | |
08460cd4 RS |
243 | } |
244 | ||
245 | return general; | |
1ab256cb RM |
246 | } |
247 | ||
04ae1b48 RS |
248 | /* Like Fassoc, but use Fstring_equal to compare |
249 | (which ignores text properties), | |
250 | and don't ever QUIT. */ | |
251 | ||
252 | static Lisp_Object | |
253 | assoc_ignore_text_properties (key, list) | |
254 | register Lisp_Object key; | |
255 | Lisp_Object list; | |
256 | { | |
257 | register Lisp_Object tail; | |
6d70a280 | 258 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
259 | { |
260 | register Lisp_Object elt, tem; | |
6d70a280 | 261 | elt = XCAR (tail); |
04ae1b48 RS |
262 | tem = Fstring_equal (Fcar (elt), key); |
263 | if (!NILP (tem)) | |
264 | return elt; | |
265 | } | |
266 | return Qnil; | |
267 | } | |
268 | ||
1ab256cb | 269 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
270 | doc: /* Return the buffer named BUFFER-OR-NAME. |
271 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
272 | is a string and there is no buffer with that name, return nil. If | |
273 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
274 | (buffer_or_name) | |
275 | register Lisp_Object buffer_or_name; | |
1ab256cb | 276 | { |
c8804c4f MR |
277 | if (BUFFERP (buffer_or_name)) |
278 | return buffer_or_name; | |
279 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 280 | |
c8804c4f | 281 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
282 | } |
283 | ||
284 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 285 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
286 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
287 | If there is no such live buffer, return nil. | |
7ee72033 MB |
288 | See also `find-buffer-visiting'. */) |
289 | (filename) | |
1ab256cb RM |
290 | register Lisp_Object filename; |
291 | { | |
292 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
293 | Lisp_Object handler; |
294 | ||
b7826503 | 295 | CHECK_STRING (filename); |
1ab256cb RM |
296 | filename = Fexpand_file_name (filename, Qnil); |
297 | ||
5fe0b67e RS |
298 | /* If the file name has special constructs in it, |
299 | call the corresponding file handler. */ | |
a617e913 | 300 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
301 | if (!NILP (handler)) |
302 | return call2 (handler, Qget_file_buffer, filename); | |
303 | ||
7539e11f | 304 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 305 | { |
7539e11f | 306 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
307 | if (!BUFFERP (buf)) continue; |
308 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 309 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 310 | if (!NILP (tem)) |
1ab256cb RM |
311 | return buf; |
312 | } | |
313 | return Qnil; | |
314 | } | |
315 | ||
52e01189 RS |
316 | Lisp_Object |
317 | get_truename_buffer (filename) | |
318 | register Lisp_Object filename; | |
319 | { | |
320 | register Lisp_Object tail, buf, tem; | |
321 | ||
7539e11f | 322 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 323 | { |
7539e11f | 324 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
325 | if (!BUFFERP (buf)) continue; |
326 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
327 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
328 | if (!NILP (tem)) | |
329 | return buf; | |
330 | } | |
331 | return Qnil; | |
332 | } | |
333 | ||
1ab256cb RM |
334 | /* Incremented for each buffer created, to assign the buffer number. */ |
335 | int buffer_count; | |
336 | ||
337 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
cd265ca6 MR |
338 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
339 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
340 | return that buffer. If no such buffer exists, create a new buffer with | |
341 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
342 | buffer does not keep undo information. | |
343 | ||
344 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
345 | even if it is dead. The return value is never nil. */) | |
346 | (buffer_or_name) | |
347 | register Lisp_Object buffer_or_name; | |
1ab256cb | 348 | { |
cd265ca6 | 349 | register Lisp_Object buffer, name; |
1ab256cb RM |
350 | register struct buffer *b; |
351 | ||
cd265ca6 MR |
352 | buffer = Fget_buffer (buffer_or_name); |
353 | if (!NILP (buffer)) | |
354 | return buffer; | |
1ab256cb | 355 | |
cd265ca6 | 356 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
357 | error ("Empty string for buffer name is not allowed"); |
358 | ||
cc648cef | 359 | b = allocate_buffer (); |
1ab256cb | 360 | |
336cd056 RS |
361 | /* An ordinary buffer uses its own struct buffer_text. */ |
362 | b->text = &b->own_text; | |
363 | b->base_buffer = 0; | |
364 | ||
1ab256cb | 365 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 366 | BLOCK_INPUT; |
3b06f880 KH |
367 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
368 | anchoring a search. */ | |
b86af064 | 369 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 370 | UNBLOCK_INPUT; |
1ab256cb | 371 | if (! BUF_BEG_ADDR (b)) |
81841847 | 372 | buffer_memory_full (); |
1ab256cb | 373 | |
6d70a280 SM |
374 | BUF_PT (b) = BEG; |
375 | BUF_GPT (b) = BEG; | |
376 | BUF_BEGV (b) = BEG; | |
377 | BUF_ZV (b) = BEG; | |
378 | BUF_Z (b) = BEG; | |
379 | BUF_PT_BYTE (b) = BEG_BYTE; | |
380 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
381 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
382 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
383 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 384 | BUF_MODIFF (b) = 1; |
3e145152 | 385 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 386 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
387 | BUF_SAVE_MODIFF (b) = 1; |
388 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
389 | BUF_UNCHANGED_MODIFIED (b) = 1; |
390 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
391 | BUF_END_UNCHANGED (b) = 0; | |
392 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 393 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 394 | |
28e969dd JB |
395 | b->newline_cache = 0; |
396 | b->width_run_cache = 0; | |
397 | b->width_table = Qnil; | |
b5a225b4 | 398 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 399 | |
1ab256cb RM |
400 | /* Put this on the chain of all buffers including killed ones. */ |
401 | b->next = all_buffers; | |
402 | all_buffers = b; | |
403 | ||
336cd056 RS |
404 | /* An ordinary buffer normally doesn't need markers |
405 | to handle BEGV and ZV. */ | |
406 | b->pt_marker = Qnil; | |
407 | b->begv_marker = Qnil; | |
408 | b->zv_marker = Qnil; | |
04ae1b48 | 409 | |
cd265ca6 | 410 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 411 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 412 | b->name = name; |
04ae1b48 | 413 | |
67ee9f6e | 414 | b->undo_list = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
415 | |
416 | reset_buffer (b); | |
13de9290 | 417 | reset_buffer_local_variables (b, 1); |
1ab256cb | 418 | |
1f57cb74 | 419 | b->mark = Fmake_marker (); |
65745fad | 420 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
421 | b->name = name; |
422 | ||
1ab256cb | 423 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
424 | XSETBUFFER (buffer, b); |
425 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 426 | |
2f064abf | 427 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
428 | can lead to infinite regress until you run out of stack. rms |
429 | says that's not worth protecting against. */ | |
48265e61 | 430 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
431 | /* buffer is on buffer-alist, so no gcpro. */ |
432 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 433 | |
cd265ca6 | 434 | return buffer; |
336cd056 RS |
435 | } |
436 | ||
7e9d5818 | 437 | |
04e4cb3a GM |
438 | /* Return a list of overlays which is a copy of the overlay list |
439 | LIST, but for buffer B. */ | |
440 | ||
2410d73a | 441 | static struct Lisp_Overlay * |
04e4cb3a GM |
442 | copy_overlays (b, list) |
443 | struct buffer *b; | |
2410d73a | 444 | struct Lisp_Overlay *list; |
04e4cb3a | 445 | { |
2410d73a SM |
446 | Lisp_Object buffer; |
447 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
448 | |
449 | XSETBUFFER (buffer, b); | |
450 | ||
2410d73a | 451 | for (; list; list = list->next) |
04e4cb3a GM |
452 | { |
453 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 454 | EMACS_INT charpos; |
04e4cb3a | 455 | |
2410d73a | 456 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
457 | charpos = marker_position (OVERLAY_START (old_overlay)); |
458 | start = Fmake_marker (); | |
db3a49a6 | 459 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
460 | XMARKER (start)->insertion_type |
461 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
462 | ||
463 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
464 | end = Fmake_marker (); | |
db3a49a6 | 465 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
466 | XMARKER (end)->insertion_type |
467 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
468 | ||
469 | overlay = allocate_misc (); | |
470 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
471 | OVERLAY_START (overlay) = start; | |
472 | OVERLAY_END (overlay) = end; | |
473 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 474 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 475 | |
2410d73a SM |
476 | if (tail) |
477 | tail = tail->next = XOVERLAY (overlay); | |
478 | else | |
479 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
480 | } |
481 | ||
2410d73a | 482 | return result; |
04e4cb3a | 483 | } |
177c0ea7 | 484 | |
04e4cb3a | 485 | |
7e9d5818 GM |
486 | /* Clone per-buffer values of buffer FROM. |
487 | ||
488 | Buffer TO gets the same per-buffer values as FROM, with the | |
489 | following exceptions: (1) TO's name is left untouched, (2) markers | |
490 | are copied and made to refer to TO, and (3) overlay lists are | |
491 | copied. */ | |
492 | ||
493 | static void | |
494 | clone_per_buffer_values (from, to) | |
495 | struct buffer *from, *to; | |
496 | { | |
54622f33 | 497 | Lisp_Object to_buffer; |
7e9d5818 GM |
498 | int offset; |
499 | ||
500 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 501 | |
3ee24aec SM |
502 | /* buffer-local Lisp variables start at `undo_list', |
503 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 504 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
505 | offset < sizeof *to; |
506 | offset += sizeof (Lisp_Object)) | |
507 | { | |
508 | Lisp_Object obj; | |
509 | ||
4b7cdc0e SM |
510 | /* Don't touch the `name' which should be unique for every buffer. */ |
511 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
512 | continue; | |
513 | ||
7e9d5818 GM |
514 | obj = PER_BUFFER_VALUE (from, offset); |
515 | if (MARKERP (obj)) | |
516 | { | |
517 | struct Lisp_Marker *m = XMARKER (obj); | |
518 | obj = Fmake_marker (); | |
519 | XMARKER (obj)->insertion_type = m->insertion_type; | |
520 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
521 | } | |
522 | ||
523 | PER_BUFFER_VALUE (to, offset) = obj; | |
524 | } | |
525 | ||
7e9d5818 | 526 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 527 | |
04e4cb3a GM |
528 | to->overlays_before = copy_overlays (to, from->overlays_before); |
529 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 530 | |
e1688f54 RS |
531 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
532 | and install that in TO. */ | |
533 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
534 | } |
535 | ||
7e9d5818 GM |
536 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
537 | 2, 3, | |
193c3837 | 538 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 539 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 540 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
541 | NAME should be a string which is not the name of an existing buffer. |
542 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
543 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
544 | CLONE nil means the indirect buffer's state is reset to default values. */) |
545 | (base_buffer, name, clone) | |
7e9d5818 | 546 | Lisp_Object base_buffer, name, clone; |
336cd056 | 547 | { |
6b61353c | 548 | Lisp_Object buf, tem; |
7e9d5818 | 549 | struct buffer *b; |
336cd056 | 550 | |
6b61353c | 551 | CHECK_STRING (name); |
336cd056 RS |
552 | buf = Fget_buffer (name); |
553 | if (!NILP (buf)) | |
d5db4077 | 554 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 555 | |
6b61353c | 556 | tem = base_buffer; |
336cd056 RS |
557 | base_buffer = Fget_buffer (base_buffer); |
558 | if (NILP (base_buffer)) | |
6b61353c KH |
559 | error ("No such buffer: `%s'", SDATA (tem)); |
560 | if (NILP (XBUFFER (base_buffer)->name)) | |
561 | error ("Base buffer has been killed"); | |
336cd056 | 562 | |
d5db4077 | 563 | if (SCHARS (name) == 0) |
336cd056 RS |
564 | error ("Empty string for buffer name is not allowed"); |
565 | ||
cc648cef | 566 | b = allocate_buffer (); |
336cd056 | 567 | |
67ee9f6e SM |
568 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
569 | ? XBUFFER (base_buffer)->base_buffer | |
570 | : XBUFFER (base_buffer)); | |
336cd056 RS |
571 | |
572 | /* Use the base buffer's text object. */ | |
573 | b->text = b->base_buffer->text; | |
574 | ||
575 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
576 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
577 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
578 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
579 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
580 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
581 | |
582 | b->newline_cache = 0; | |
583 | b->width_run_cache = 0; | |
584 | b->width_table = Qnil; | |
585 | ||
586 | /* Put this on the chain of all buffers including killed ones. */ | |
587 | b->next = all_buffers; | |
588 | all_buffers = b; | |
589 | ||
590 | name = Fcopy_sequence (name); | |
ab77f05c | 591 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
592 | b->name = name; |
593 | ||
594 | reset_buffer (b); | |
13de9290 | 595 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
596 | |
597 | /* Put this in the alist of all live buffers. */ | |
598 | XSETBUFFER (buf, b); | |
599 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
600 | ||
601 | b->mark = Fmake_marker (); | |
1ab256cb | 602 | b->name = name; |
336cd056 | 603 | |
abc9d959 RS |
604 | /* The multibyte status belongs to the base buffer. */ |
605 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
606 | ||
336cd056 RS |
607 | /* Make sure the base buffer has markers for its narrowing. */ |
608 | if (NILP (b->base_buffer->pt_marker)) | |
609 | { | |
610 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
611 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
612 | BUF_PT (b->base_buffer), | |
613 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
614 | } |
615 | if (NILP (b->base_buffer->begv_marker)) | |
616 | { | |
617 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
618 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
619 | BUF_BEGV (b->base_buffer), | |
620 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
621 | } |
622 | if (NILP (b->base_buffer->zv_marker)) | |
623 | { | |
624 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
625 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
626 | BUF_ZV (b->base_buffer), | |
627 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 628 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
629 | } |
630 | ||
7e9d5818 GM |
631 | if (NILP (clone)) |
632 | { | |
633 | /* Give the indirect buffer markers for its narrowing. */ | |
634 | b->pt_marker = Fmake_marker (); | |
635 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
636 | b->begv_marker = Fmake_marker (); | |
637 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
638 | b->zv_marker = Fmake_marker (); | |
639 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
640 | XMARKER (b->zv_marker)->insertion_type = 1; | |
641 | } | |
642 | else | |
7fa57e45 RS |
643 | { |
644 | struct buffer *old_b = current_buffer; | |
645 | ||
646 | clone_per_buffer_values (b->base_buffer, b); | |
647 | b->filename = Qnil; | |
648 | b->file_truename = Qnil; | |
649 | b->display_count = make_number (0); | |
650 | b->backed_up = Qnil; | |
651 | b->auto_save_file_name = Qnil; | |
652 | set_buffer_internal_1 (b); | |
653 | Fset (intern ("buffer-save-without-query"), Qnil); | |
654 | Fset (intern ("buffer-file-number"), Qnil); | |
655 | Fset (intern ("buffer-stale-function"), Qnil); | |
656 | set_buffer_internal_1 (old_b); | |
657 | } | |
336cd056 | 658 | |
a9ee7a59 | 659 | return buf; |
1ab256cb RM |
660 | } |
661 | ||
d4f5719a SM |
662 | void |
663 | delete_all_overlays (b) | |
664 | struct buffer *b; | |
665 | { | |
666 | Lisp_Object overlay; | |
667 | ||
668 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
669 | have to empty the list, otherwise we end up with overlays that | |
670 | think they belong to this buffer while the buffer doesn't know about | |
671 | them any more. */ | |
672 | while (b->overlays_before) | |
673 | { | |
674 | XSETMISC (overlay, b->overlays_before); | |
675 | Fdelete_overlay (overlay); | |
676 | } | |
677 | while (b->overlays_after) | |
678 | { | |
679 | XSETMISC (overlay, b->overlays_after); | |
680 | Fdelete_overlay (overlay); | |
681 | } | |
682 | eassert (b->overlays_before == NULL); | |
683 | eassert (b->overlays_after == NULL); | |
684 | } | |
685 | ||
bcd40520 | 686 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 687 | and local variables. |
d4f5719a SM |
688 | If called on an already-initialized buffer, the list of overlays |
689 | should be deleted before calling this function, otherwise we end up | |
690 | with overlays that claim to belong to the buffer but the buffer | |
691 | claims it doesn't belong to it. */ | |
1ab256cb RM |
692 | |
693 | void | |
694 | reset_buffer (b) | |
695 | register struct buffer *b; | |
696 | { | |
697 | b->filename = Qnil; | |
f6ed2e84 | 698 | b->file_truename = Qnil; |
1ab256cb RM |
699 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
700 | b->modtime = 0; | |
8d7a4592 | 701 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 702 | b->last_window_start = 1; |
8b264726 | 703 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
704 | b->clip_changed = 0; |
705 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb | 706 | b->backed_up = Qnil; |
0b5397c2 | 707 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 708 | b->auto_save_failure_time = -1; |
1ab256cb RM |
709 | b->auto_save_file_name = Qnil; |
710 | b->read_only = Qnil; | |
2410d73a SM |
711 | b->overlays_before = NULL; |
712 | b->overlays_after = NULL; | |
c2d5b10f | 713 | b->overlay_center = BEG; |
dfda7a7f | 714 | b->mark_active = Qnil; |
943e065b | 715 | b->point_before_scroll = Qnil; |
be9aafdd | 716 | b->file_format = Qnil; |
71ed49fa | 717 | b->auto_save_file_format = Qt; |
0dc6f165 | 718 | b->last_selected_window = Qnil; |
7962a441 | 719 | XSETINT (b->display_count, 0); |
3fd364db | 720 | b->display_time = Qnil; |
1bf08baf | 721 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 722 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 723 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
724 | |
725 | b->display_error_modiff = 0; | |
1ab256cb RM |
726 | } |
727 | ||
bcd40520 RS |
728 | /* Reset buffer B's local variables info. |
729 | Don't use this on a buffer that has already been in use; | |
730 | it does not treat permanent locals consistently. | |
13de9290 RS |
731 | Instead, use Fkill_all_local_variables. |
732 | ||
3709505e | 733 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
734 | buffer-local variables. If PERMANENT_TOO is 0, |
735 | we preserve those. */ | |
bcd40520 | 736 | |
13de9290 RS |
737 | static void |
738 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 739 | register struct buffer *b; |
13de9290 | 740 | int permanent_too; |
1ab256cb RM |
741 | { |
742 | register int offset; | |
7c02e886 | 743 | int i; |
1ab256cb RM |
744 | |
745 | /* Reset the major mode to Fundamental, together with all the | |
746 | things that depend on the major mode. | |
747 | default-major-mode is handled at a higher level. | |
748 | We ignore it here. */ | |
749 | b->major_mode = Qfundamental_mode; | |
750 | b->keymap = Qnil; | |
1ab256cb RM |
751 | b->mode_name = QSFundamental; |
752 | b->minor_modes = Qnil; | |
3446af9c RS |
753 | |
754 | /* If the standard case table has been altered and invalidated, | |
755 | fix up its insides first. */ | |
756 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
757 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
758 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
759 | Fset_standard_case_table (Vascii_downcase_table); | |
760 | ||
1ab256cb | 761 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
762 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
763 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
764 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 765 | b->invisibility_spec = Qt; |
2e716096 RS |
766 | #ifndef DOS_NT |
767 | b->buffer_file_type = Qnil; | |
768 | #endif | |
3cb719bd | 769 | |
13de9290 | 770 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e SM |
771 | if (permanent_too) |
772 | b->local_var_alist = Qnil; | |
773 | else | |
774 | { | |
2f7a359d | 775 | Lisp_Object tmp, prop, last = Qnil; |
3709505e SM |
776 | for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp)) |
777 | if (CONSP (XCAR (tmp)) | |
778 | && SYMBOLP (XCAR (XCAR (tmp))) | |
2f7a359d RS |
779 | && !NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
780 | { | |
781 | /* If permanent-local, keep it. */ | |
782 | last = tmp; | |
783 | if (EQ (prop, Qpermanent_local_hook)) | |
784 | { | |
785 | /* This is a partially permanent hook variable. | |
786 | Preserve only the elements that want to be preserved. */ | |
787 | Lisp_Object list, newlist; | |
788 | list = XCDR (XCAR (tmp)); | |
789 | if (!CONSP (list)) | |
790 | newlist = list; | |
791 | else | |
792 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
793 | { | |
794 | Lisp_Object elt = XCAR (list); | |
795 | /* Preserve element ELT if it's t, | |
796 | if it is a function with a `permanent-local-hook' property, | |
797 | or if it's not a symbol. */ | |
798 | if (! SYMBOLP (elt) | |
799 | || EQ (elt, Qt) | |
800 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
801 | newlist = Fcons (elt, newlist); | |
802 | } | |
803 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
804 | } | |
805 | } | |
806 | /* Delete this local variable. */ | |
3709505e SM |
807 | else if (NILP (last)) |
808 | b->local_var_alist = XCDR (tmp); | |
809 | else | |
810 | XSETCDR (last, XCDR (tmp)); | |
811 | } | |
812 | ||
7313acd0 | 813 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 814 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 815 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
816 | |
817 | /* For each slot that has a default value, | |
818 | copy that into the slot. */ | |
819 | ||
3ee24aec SM |
820 | /* buffer-local Lisp variables start at `undo_list', |
821 | tho only the ones from `name' on are GC'd normally. */ | |
822 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
823 | offset < sizeof *b; |
824 | offset += sizeof (Lisp_Object)) | |
aab80822 | 825 | { |
7313acd0 | 826 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
827 | if ((idx > 0 |
828 | && (permanent_too | |
829 | || buffer_permanent_local_flags[idx] == 0)) | |
830 | /* Is -2 used anywhere? */ | |
831 | || idx == -2) | |
7313acd0 | 832 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 833 | } |
1ab256cb RM |
834 | } |
835 | ||
01050cb5 RM |
836 | /* We split this away from generate-new-buffer, because rename-buffer |
837 | and set-visited-file-name ought to be able to use this to really | |
838 | rename the buffer properly. */ | |
839 | ||
840 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 841 | 1, 2, 0, |
7ee72033 | 842 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
843 | If there is no live buffer named NAME, then return NAME. |
844 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 845 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
846 | Optional second argument IGNORE specifies a name that is okay to use (if |
847 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
7ee72033 | 848 | (name, ignore) |
c273e647 | 849 | register Lisp_Object name, ignore; |
1ab256cb RM |
850 | { |
851 | register Lisp_Object gentemp, tem; | |
852 | int count; | |
853 | char number[10]; | |
854 | ||
b7826503 | 855 | CHECK_STRING (name); |
1ab256cb | 856 | |
6b61353c KH |
857 | tem = Fstring_equal (name, ignore); |
858 | if (!NILP (tem)) | |
859 | return name; | |
1ab256cb | 860 | tem = Fget_buffer (name); |
265a9e55 | 861 | if (NILP (tem)) |
01050cb5 | 862 | return name; |
1ab256cb RM |
863 | |
864 | count = 1; | |
865 | while (1) | |
866 | { | |
867 | sprintf (number, "<%d>", ++count); | |
868 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 869 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
870 | if (!NILP (tem)) |
871 | return gentemp; | |
1ab256cb | 872 | tem = Fget_buffer (gentemp); |
265a9e55 | 873 | if (NILP (tem)) |
01050cb5 | 874 | return gentemp; |
1ab256cb RM |
875 | } |
876 | } | |
877 | ||
878 | \f | |
879 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 | 880 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
881 | BUFFER defaults to the current buffer. |
882 | Return nil if BUFFER has been killed. */) | |
7ee72033 | 883 | (buffer) |
1ab256cb RM |
884 | register Lisp_Object buffer; |
885 | { | |
265a9e55 | 886 | if (NILP (buffer)) |
1ab256cb | 887 | return current_buffer->name; |
b7826503 | 888 | CHECK_BUFFER (buffer); |
1ab256cb RM |
889 | return XBUFFER (buffer)->name; |
890 | } | |
891 | ||
892 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
893 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
894 | No argument or nil as argument means use the current buffer. */) | |
895 | (buffer) | |
1ab256cb RM |
896 | register Lisp_Object buffer; |
897 | { | |
265a9e55 | 898 | if (NILP (buffer)) |
1ab256cb | 899 | return current_buffer->filename; |
b7826503 | 900 | CHECK_BUFFER (buffer); |
1ab256cb RM |
901 | return XBUFFER (buffer)->filename; |
902 | } | |
903 | ||
336cd056 RS |
904 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
905 | 0, 1, 0, | |
7ee72033 | 906 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
907 | If BUFFER is not indirect, return nil. |
908 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 909 | (buffer) |
336cd056 RS |
910 | register Lisp_Object buffer; |
911 | { | |
912 | struct buffer *base; | |
913 | Lisp_Object base_buffer; | |
914 | ||
915 | if (NILP (buffer)) | |
916 | base = current_buffer->base_buffer; | |
917 | else | |
918 | { | |
b7826503 | 919 | CHECK_BUFFER (buffer); |
336cd056 RS |
920 | base = XBUFFER (buffer)->base_buffer; |
921 | } | |
922 | ||
923 | if (! base) | |
924 | return Qnil; | |
925 | XSETBUFFER (base_buffer, base); | |
926 | return base_buffer; | |
927 | } | |
928 | ||
79aa712d | 929 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 930 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
931 | doc: /* Return the value of VARIABLE in BUFFER. |
932 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
933 | is the default binding of the variable. */) |
934 | (variable, buffer) | |
935 | register Lisp_Object variable; | |
79aa712d RS |
936 | register Lisp_Object buffer; |
937 | { | |
938 | register struct buffer *buf; | |
939 | register Lisp_Object result; | |
ad97b375 | 940 | struct Lisp_Symbol *sym; |
79aa712d | 941 | |
5e2ad10b | 942 | CHECK_SYMBOL (variable); |
ae69175b | 943 | CHECK_BUFFER (buffer); |
79aa712d RS |
944 | buf = XBUFFER (buffer); |
945 | ||
ad97b375 SM |
946 | sym = indirect_variable (XSYMBOL (variable)); |
947 | XSETSYMBOL (variable, sym); | |
0e4d0c9a | 948 | |
79aa712d | 949 | /* Look in local_var_list */ |
5e2ad10b | 950 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 951 | if (NILP (result)) |
79aa712d RS |
952 | { |
953 | int offset, idx; | |
954 | int found = 0; | |
955 | ||
956 | /* Look in special slots */ | |
3ee24aec SM |
957 | /* buffer-local Lisp variables start at `undo_list', |
958 | tho only the ones from `name' on are GC'd normally. */ | |
959 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
79aa712d RS |
960 | offset < sizeof (struct buffer); |
961 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
962 | offset += (sizeof (EMACS_INT))) | |
963 | { | |
964 | idx = PER_BUFFER_IDX (offset); | |
965 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 966 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 967 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
968 | { |
969 | result = PER_BUFFER_VALUE (buf, offset); | |
970 | found = 1; | |
971 | break; | |
972 | } | |
973 | } | |
974 | ||
975 | if (!found) | |
5e2ad10b | 976 | result = Fdefault_value (variable); |
79aa712d RS |
977 | } |
978 | else | |
f0bac7de RS |
979 | { |
980 | Lisp_Object valcontents; | |
981 | Lisp_Object current_alist_element; | |
982 | ||
983 | /* What binding is loaded right now? */ | |
ad97b375 | 984 | valcontents = sym->value; |
f0bac7de RS |
985 | current_alist_element |
986 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
987 | ||
988 | /* The value of the currently loaded binding is not | |
989 | stored in it, but rather in the realvalue slot. | |
990 | Store that value into the binding it belongs to | |
991 | in case that is the one we are about to use. */ | |
992 | ||
993 | Fsetcdr (current_alist_element, | |
994 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
995 | ||
996 | /* Now get the (perhaps updated) value out of the binding. */ | |
997 | result = XCDR (result); | |
998 | } | |
79aa712d | 999 | |
4c4dc0b0 KS |
1000 | if (!EQ (result, Qunbound)) |
1001 | return result; | |
79aa712d | 1002 | |
4c4dc0b0 | 1003 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
1004 | } |
1005 | ||
e1688f54 | 1006 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1007 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
1008 | in special slots in the buffer object. */ |
1009 | ||
1010 | static Lisp_Object | |
1011 | buffer_lisp_local_variables (buf) | |
1012 | struct buffer *buf; | |
1013 | { | |
1014 | Lisp_Object result = Qnil; | |
1015 | register Lisp_Object tail; | |
1016 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
1017 | { | |
1018 | Lisp_Object val, elt; | |
1019 | ||
1020 | elt = XCAR (tail); | |
1021 | ||
1022 | /* Reference each variable in the alist in buf. | |
1023 | If inquiring about the current buffer, this gets the current values, | |
1024 | so store them into the alist so the alist is up to date. | |
1025 | If inquiring about some other buffer, this swaps out any values | |
1026 | for that buffer, making the alist up to date automatically. */ | |
1027 | val = find_symbol_value (XCAR (elt)); | |
1028 | /* Use the current buffer value only if buf is the current buffer. */ | |
1029 | if (buf != current_buffer) | |
1030 | val = XCDR (elt); | |
1031 | ||
1032 | /* If symbol is unbound, put just the symbol in the list. */ | |
1033 | if (EQ (val, Qunbound)) | |
1034 | result = Fcons (XCAR (elt), result); | |
1035 | /* Otherwise, put (symbol . value) in the list. */ | |
1036 | else | |
1037 | result = Fcons (Fcons (XCAR (elt), val), result); | |
1038 | } | |
1039 | ||
1040 | return result; | |
1041 | } | |
1042 | ||
1ab256cb | 1043 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1044 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1045 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1046 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1047 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1048 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
1049 | No argument or nil as argument means use current buffer as BUFFER. */) |
1050 | (buffer) | |
1ab256cb RM |
1051 | register Lisp_Object buffer; |
1052 | { | |
1053 | register struct buffer *buf; | |
553defa4 | 1054 | register Lisp_Object result; |
1ab256cb | 1055 | |
265a9e55 | 1056 | if (NILP (buffer)) |
1ab256cb RM |
1057 | buf = current_buffer; |
1058 | else | |
1059 | { | |
b7826503 | 1060 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1061 | buf = XBUFFER (buffer); |
1062 | } | |
1063 | ||
e1688f54 | 1064 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1065 | |
1ab256cb RM |
1066 | /* Add on all the variables stored in special slots. */ |
1067 | { | |
7c02e886 | 1068 | int offset, idx; |
1ab256cb | 1069 | |
3ee24aec SM |
1070 | /* buffer-local Lisp variables start at `undo_list', |
1071 | tho only the ones from `name' on are GC'd normally. */ | |
1072 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1073 | offset < sizeof (struct buffer); |
7c02e886 GM |
1074 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1075 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1076 | { |
7313acd0 GM |
1077 | idx = PER_BUFFER_IDX (offset); |
1078 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1079 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1080 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1081 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1082 | result); |
1ab256cb RM |
1083 | } |
1084 | } | |
553defa4 RS |
1085 | |
1086 | return result; | |
1ab256cb | 1087 | } |
1ab256cb RM |
1088 | \f |
1089 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1090 | 0, 1, 0, |
7ee72033 MB |
1091 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1092 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1093 | (buffer) | |
1ab256cb RM |
1094 | register Lisp_Object buffer; |
1095 | { | |
1096 | register struct buffer *buf; | |
265a9e55 | 1097 | if (NILP (buffer)) |
1ab256cb RM |
1098 | buf = current_buffer; |
1099 | else | |
1100 | { | |
b7826503 | 1101 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1102 | buf = XBUFFER (buffer); |
1103 | } | |
1104 | ||
336cd056 | 1105 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1106 | } |
1107 | ||
1108 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1109 | 1, 1, 0, |
7ee72033 MB |
1110 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1111 | A non-nil FLAG means mark the buffer modified. */) | |
1112 | (flag) | |
1ab256cb RM |
1113 | register Lisp_Object flag; |
1114 | { | |
1115 | register int already; | |
1116 | register Lisp_Object fn; | |
8ec01c70 | 1117 | Lisp_Object buffer, window; |
1ab256cb RM |
1118 | |
1119 | #ifdef CLASH_DETECTION | |
1120 | /* If buffer becoming modified, lock the file. | |
1121 | If buffer becoming unmodified, unlock the file. */ | |
1122 | ||
60f4dd23 | 1123 | fn = current_buffer->file_truename; |
90d456d2 KH |
1124 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1125 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1126 | { |
336cd056 | 1127 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1128 | if (!already && !NILP (flag)) |
1ab256cb | 1129 | lock_file (fn); |
265a9e55 | 1130 | else if (already && NILP (flag)) |
1ab256cb RM |
1131 | unlock_file (fn); |
1132 | } | |
1133 | #endif /* CLASH_DETECTION */ | |
1134 | ||
0b5397c2 SM |
1135 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1136 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1137 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1138 | modify SAVE_MODIFF to affect one, we may affect the other | |
1139 | as well. | |
1140 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1141 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1142 | recent-auto-save-p from t to nil. | |
1143 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1144 | we risk changing recent-auto-save-p from nil to t. */ | |
1145 | SAVE_MODIFF = (NILP (flag) | |
1146 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1147 | ? MODIFF | |
1148 | /* Let's try to preserve recent-auto-save-p. */ | |
1149 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1150 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1151 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1152 | or increase MODIFF. */ | |
1153 | : MODIFF++); | |
177c0ea7 | 1154 | |
8ec01c70 GM |
1155 | /* Set update_mode_lines only if buffer is displayed in some window. |
1156 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1157 | state by recording/restoring the state around blocks of code. | |
1158 | Setting update_mode_lines makes redisplay consider all windows | |
1159 | (on all frames). Stealth fontification of buffers not displayed | |
1160 | would incur additional redisplay costs if we'd set | |
1161 | update_modes_lines unconditionally. | |
1162 | ||
1163 | Ideally, I think there should be another mechanism for fontifying | |
1164 | buffers without "modifying" buffers, or redisplay should be | |
1165 | smarter about updating the `*' in mode lines. --gerd */ | |
1166 | XSETBUFFER (buffer, current_buffer); | |
1167 | window = Fget_buffer_window (buffer, Qt); | |
1168 | if (WINDOWP (window)) | |
d57b83b3 GM |
1169 | { |
1170 | ++update_mode_lines; | |
1171 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1172 | } | |
177c0ea7 | 1173 | |
1ab256cb RM |
1174 | return flag; |
1175 | } | |
1176 | ||
a8c21b48 GM |
1177 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1178 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1179 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1180 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1181 | state of the current buffer. Use with care. */) |
1182 | (flag) | |
a8c21b48 GM |
1183 | Lisp_Object flag; |
1184 | { | |
1185 | #ifdef CLASH_DETECTION | |
1186 | Lisp_Object fn; | |
177c0ea7 | 1187 | |
a8c21b48 GM |
1188 | /* If buffer becoming modified, lock the file. |
1189 | If buffer becoming unmodified, unlock the file. */ | |
1190 | ||
1191 | fn = current_buffer->file_truename; | |
1192 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1193 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1194 | { | |
1195 | int already = SAVE_MODIFF < MODIFF; | |
1196 | if (!already && !NILP (flag)) | |
1197 | lock_file (fn); | |
1198 | else if (already && NILP (flag)) | |
1199 | unlock_file (fn); | |
1200 | } | |
1201 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1202 | |
a8c21b48 GM |
1203 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1204 | return flag; | |
1205 | } | |
1206 | ||
1ab256cb | 1207 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1208 | 0, 1, 0, |
7ee72033 | 1209 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1210 | Each buffer has a tick counter which is incremented each time the |
1211 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1212 | No argument or nil as argument means use current buffer as BUFFER. */) |
1213 | (buffer) | |
1ab256cb RM |
1214 | register Lisp_Object buffer; |
1215 | { | |
1216 | register struct buffer *buf; | |
265a9e55 | 1217 | if (NILP (buffer)) |
1ab256cb RM |
1218 | buf = current_buffer; |
1219 | else | |
1220 | { | |
b7826503 | 1221 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1222 | buf = XBUFFER (buffer); |
1223 | } | |
1224 | ||
1225 | return make_number (BUF_MODIFF (buf)); | |
1226 | } | |
3e145152 CY |
1227 | |
1228 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1229 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1230 | doc: /* Return BUFFER's character-change tick counter. | |
1231 | Each buffer has a character-change tick counter, which is set to the | |
1232 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1233 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1234 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1235 | you can tell whether a character change occurred in that buffer in |
1236 | between these calls. No argument or nil as argument means use current | |
1237 | buffer as BUFFER. */) | |
1238 | (buffer) | |
1239 | register Lisp_Object buffer; | |
1240 | { | |
1241 | register struct buffer *buf; | |
1242 | if (NILP (buffer)) | |
1243 | buf = current_buffer; | |
1244 | else | |
1245 | { | |
1246 | CHECK_BUFFER (buffer); | |
1247 | buf = XBUFFER (buffer); | |
1248 | } | |
1249 | ||
1250 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1251 | } | |
1ab256cb | 1252 | \f |
01050cb5 | 1253 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1254 | "(list (read-string \"Rename buffer (to new name): \" \ |
1255 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1256 | current-prefix-arg)", | |
7ee72033 | 1257 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1258 | If second arg UNIQUE is nil or omitted, it is an error if a |
1259 | buffer named NEWNAME already exists. | |
1260 | If UNIQUE is non-nil, come up with a new name using | |
1261 | `generate-new-buffer-name'. | |
1262 | Interactively, you can set UNIQUE with a prefix argument. | |
1263 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1264 | This does not change the name of the visited file (if any). */) |
1265 | (newname, unique) | |
489c043a | 1266 | register Lisp_Object newname, unique; |
1ab256cb RM |
1267 | { |
1268 | register Lisp_Object tem, buf; | |
1269 | ||
b7826503 | 1270 | CHECK_STRING (newname); |
d59698c4 | 1271 | |
d5db4077 | 1272 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1273 | error ("Empty string is invalid as a buffer name"); |
1274 | ||
489c043a | 1275 | tem = Fget_buffer (newname); |
265a9e55 | 1276 | if (!NILP (tem)) |
01050cb5 | 1277 | { |
8801a864 KR |
1278 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1279 | rename the buffer automatically so you can create another | |
1280 | with the original name. It makes UNIQUE equivalent to | |
1281 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1282 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1283 | return current_buffer->name; | |
3bd779aa | 1284 | if (!NILP (unique)) |
489c043a | 1285 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1286 | else |
d5db4077 | 1287 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1288 | } |
1ab256cb | 1289 | |
489c043a | 1290 | current_buffer->name = newname; |
76f590d7 JB |
1291 | |
1292 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1293 | any windows displaying current_buffer will stay unchanged. */ | |
1294 | update_mode_lines++; | |
1295 | ||
67180c6a | 1296 | XSETBUFFER (buf, current_buffer); |
489c043a | 1297 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1298 | if (NILP (current_buffer->filename) |
1299 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1300 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1301 | /* Refetch since that last call may have done GC. */ |
1302 | return current_buffer->name; | |
1ab256cb RM |
1303 | } |
1304 | ||
773fbdb9 | 1305 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1306 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1307 | Buffers not visible in windows are preferred to visible buffers, |
1308 | unless optional second argument VISIBLE-OK is non-nil. | |
1309 | If the optional third argument FRAME is non-nil, use that frame's | |
1310 | buffer list instead of the selected frame's buffer list. | |
1311 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1312 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1313 | (buffer, visible_ok, frame) | |
773fbdb9 | 1314 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1315 | { |
89132f25 | 1316 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1317 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1318 | notsogood = Qnil; |
1319 | ||
773fbdb9 | 1320 | if (NILP (frame)) |
9ba9623d | 1321 | frame = selected_frame; |
773fbdb9 | 1322 | |
7962a441 | 1323 | tail = Vbuffer_alist; |
773fbdb9 | 1324 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1325 | |
1326 | /* Consider buffers that have been seen in the selected frame | |
1327 | before other buffers. */ | |
177c0ea7 | 1328 | |
773fbdb9 | 1329 | tem = frame_buffer_list (frame); |
7962a441 RS |
1330 | add_ons = Qnil; |
1331 | while (CONSP (tem)) | |
1332 | { | |
7539e11f KR |
1333 | if (BUFFERP (XCAR (tem))) |
1334 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1335 | tem = XCDR (tem); | |
7962a441 RS |
1336 | } |
1337 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1338 | ||
6d70a280 | 1339 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1340 | { |
6d70a280 | 1341 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1342 | if (EQ (buf, buffer)) |
1343 | continue; | |
6b61353c KH |
1344 | if (NILP (buf)) |
1345 | continue; | |
1346 | if (NILP (XBUFFER (buf)->name)) | |
1347 | continue; | |
10ceceb8 | 1348 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1349 | continue; |
04ae1b48 RS |
1350 | /* If the selected frame has a buffer_predicate, |
1351 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1352 | if (!NILP (pred)) |
04ae1b48 | 1353 | { |
7962a441 | 1354 | tem = call1 (pred, buf); |
04ae1b48 RS |
1355 | if (NILP (tem)) |
1356 | continue; | |
1357 | } | |
04ae1b48 | 1358 | |
a0ebb746 | 1359 | if (NILP (visible_ok)) |
66ffe51c | 1360 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1361 | else |
1362 | tem = Qnil; | |
265a9e55 | 1363 | if (NILP (tem)) |
1ab256cb | 1364 | return buf; |
265a9e55 | 1365 | if (NILP (notsogood)) |
1ab256cb RM |
1366 | notsogood = buf; |
1367 | } | |
265a9e55 | 1368 | if (!NILP (notsogood)) |
1ab256cb | 1369 | return notsogood; |
dba1a30a GM |
1370 | buf = Fget_buffer (build_string ("*scratch*")); |
1371 | if (NILP (buf)) | |
1372 | { | |
1373 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1374 | Fset_buffer_major_mode (buf); | |
1375 | } | |
89132f25 | 1376 | return buf; |
1ab256cb RM |
1377 | } |
1378 | \f | |
1ab256cb RM |
1379 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1380 | 0, 1, "", | |
7ee72033 MB |
1381 | doc: /* Start keeping undo information for buffer BUFFER. |
1382 | No argument or nil as argument means do this for the current buffer. */) | |
1383 | (buffer) | |
ffd56f97 | 1384 | register Lisp_Object buffer; |
1ab256cb | 1385 | { |
ffd56f97 | 1386 | Lisp_Object real_buffer; |
1ab256cb | 1387 | |
ffd56f97 | 1388 | if (NILP (buffer)) |
67180c6a | 1389 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1390 | else |
1391 | { | |
ffd56f97 JB |
1392 | real_buffer = Fget_buffer (buffer); |
1393 | if (NILP (real_buffer)) | |
1394 | nsberror (buffer); | |
1ab256cb RM |
1395 | } |
1396 | ||
ffd56f97 JB |
1397 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1398 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1399 | |
1400 | return Qnil; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1405 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1406 | The buffer being killed will be current while the hook is running.\n\ | |
1407 | See `kill-buffer'." | |
1408 | */ | |
c8804c4f MR |
1409 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
1410 | doc: /* Kill buffer BUFFER-OR-NAME. | |
1411 | The argument may be a buffer or the name of an existing buffer. | |
1412 | Argument nil or omitted means kill the current buffer. Return t if the | |
1413 | buffer is actually killed, nil otherwise. | |
1414 | ||
1415 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1416 | windows currently displaying the buffer to be killed. The functions in | |
1417 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1418 | the current buffer. If any of them returns nil, the buffer is not | |
1419 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1420 | actually killed. The buffer being killed will be current while the hook | |
1421 | is running. | |
018ba359 PJ |
1422 | |
1423 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1424 | with SIGHUP. */) |
c8804c4f MR |
1425 | (buffer_or_name) |
1426 | Lisp_Object buffer_or_name; | |
1ab256cb | 1427 | { |
c8804c4f | 1428 | Lisp_Object buffer; |
1ab256cb RM |
1429 | register struct buffer *b; |
1430 | register Lisp_Object tem; | |
1431 | register struct Lisp_Marker *m; | |
6af718a4 | 1432 | struct gcpro gcpro1; |
1ab256cb | 1433 | |
c8804c4f MR |
1434 | if (NILP (buffer_or_name)) |
1435 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1436 | else |
c8804c4f MR |
1437 | buffer = Fget_buffer (buffer_or_name); |
1438 | if (NILP (buffer)) | |
1439 | nsberror (buffer_or_name); | |
1ab256cb | 1440 | |
c8804c4f | 1441 | b = XBUFFER (buffer); |
1ab256cb | 1442 | |
4a4a9db5 KH |
1443 | /* Avoid trouble for buffer already dead. */ |
1444 | if (NILP (b->name)) | |
1445 | return Qnil; | |
1446 | ||
1ab256cb | 1447 | /* Query if the buffer is still modified. */ |
265a9e55 | 1448 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1449 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1450 | { |
c8804c4f | 1451 | GCPRO1 (buffer); |
5c4930b0 RS |
1452 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1453 | b->name, make_number (0))); | |
1ab256cb | 1454 | UNGCPRO; |
265a9e55 | 1455 | if (NILP (tem)) |
1ab256cb RM |
1456 | return Qnil; |
1457 | } | |
1458 | ||
dcdffbf6 | 1459 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1460 | { |
aed13378 | 1461 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1462 | Lisp_Object arglist[1]; |
1ab256cb RM |
1463 | |
1464 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1465 | set_buffer_internal (b); | |
dcdffbf6 RS |
1466 | |
1467 | /* First run the query functions; if any query is answered no, | |
1468 | don't kill the buffer. */ | |
5b20caf0 | 1469 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1470 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1471 | if (NILP (tem)) | |
5b20caf0 | 1472 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1473 | |
1474 | /* Then run the hooks. */ | |
f1597a3a | 1475 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1476 | unbind_to (count, Qnil); |
1477 | } | |
1478 | ||
1479 | /* We have no more questions to ask. Verify that it is valid | |
1480 | to kill the buffer. This must be done after the questions | |
1481 | since anything can happen within do_yes_or_no_p. */ | |
1482 | ||
1483 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1484 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1485 | return Qnil; |
1486 | ||
265a9e55 | 1487 | if (NILP (b->name)) |
1ab256cb RM |
1488 | return Qnil; |
1489 | ||
336cd056 RS |
1490 | /* When we kill a base buffer, kill all its indirect buffers. |
1491 | We do it at this stage so nothing terrible happens if they | |
1492 | ask questions or their hooks get errors. */ | |
1493 | if (! b->base_buffer) | |
1494 | { | |
1495 | struct buffer *other; | |
1496 | ||
c8804c4f | 1497 | GCPRO1 (buffer); |
336cd056 RS |
1498 | |
1499 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1500 | /* all_buffers contains dead buffers too; |
1501 | don't re-kill them. */ | |
1502 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 | 1503 | { |
c8804c4f MR |
1504 | Lisp_Object buffer; |
1505 | XSETBUFFER (buffer, other); | |
1506 | Fkill_buffer (buffer); | |
336cd056 RS |
1507 | } |
1508 | ||
1509 | UNGCPRO; | |
1510 | } | |
177c0ea7 | 1511 | |
1ab256cb RM |
1512 | /* Make this buffer not be current. |
1513 | In the process, notice if this is the sole visible buffer | |
1514 | and give up if so. */ | |
1515 | if (b == current_buffer) | |
1516 | { | |
c8804c4f | 1517 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1518 | Fset_buffer (tem); |
1519 | if (b == current_buffer) | |
1520 | return Qnil; | |
1521 | } | |
1522 | ||
77270fac GM |
1523 | /* Notice if the buffer to kill is the sole visible buffer |
1524 | when we're currently in the mini-buffer, and give up if so. */ | |
1525 | XSETBUFFER (tem, current_buffer); | |
1526 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1527 | { | |
c8804c4f MR |
1528 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1529 | if (EQ (buffer, tem)) | |
77270fac GM |
1530 | return Qnil; |
1531 | } | |
1532 | ||
1ab256cb RM |
1533 | /* Now there is no question: we can kill the buffer. */ |
1534 | ||
1535 | #ifdef CLASH_DETECTION | |
1536 | /* Unlock this buffer's file, if it is locked. */ | |
1537 | unlock_buffer (b); | |
1538 | #endif /* CLASH_DETECTION */ | |
1539 | ||
c8804c4f MR |
1540 | GCPRO1 (buffer); |
1541 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1542 | UNGCPRO; |
1543 | ||
1544 | /* Killing buffer processes may run sentinels which may | |
1545 | have called kill-buffer. */ | |
1546 | ||
1547 | if (NILP (b->name)) | |
1548 | return Qnil; | |
1549 | ||
b93fb365 | 1550 | clear_charpos_cache (b); |
1ab256cb RM |
1551 | |
1552 | tem = Vinhibit_quit; | |
1553 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1554 | replace_buffer_in_all_windows (buffer); |
1555 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1556 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1557 | Vinhibit_quit = tem; |
1558 | ||
9cf712eb RS |
1559 | /* Delete any auto-save file, if we saved it in this session. |
1560 | But not if the buffer is modified. */ | |
a7a60ce9 | 1561 | if (STRINGP (b->auto_save_file_name) |
0b5397c2 SM |
1562 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1563 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1564 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1565 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1566 | { |
1567 | Lisp_Object tem; | |
1568 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1569 | if (! NILP (tem)) |
cbb6a418 | 1570 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1571 | } |
1572 | ||
4a4a9db5 KH |
1573 | if (b->base_buffer) |
1574 | { | |
1575 | /* Unchain all markers that belong to this indirect buffer. | |
1576 | Don't unchain the markers that belong to the base buffer | |
1577 | or its other indirect buffers. */ | |
65745fad | 1578 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1579 | { |
65745fad | 1580 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1581 | if (m->buffer == b) |
65745fad SM |
1582 | unchain_marker (m); |
1583 | m = next; | |
4a4a9db5 KH |
1584 | } |
1585 | } | |
1586 | else | |
1ab256cb | 1587 | { |
4a4a9db5 | 1588 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1589 | and leave them pointing nowhere. */ |
65745fad | 1590 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1591 | { |
65745fad | 1592 | struct Lisp_Marker *next = m->next; |
336cd056 | 1593 | m->buffer = 0; |
65745fad SM |
1594 | m->next = NULL; |
1595 | m = next; | |
336cd056 | 1596 | } |
65745fad | 1597 | BUF_MARKERS (b) = NULL; |
336cd056 | 1598 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1599 | |
1600 | /* Perhaps we should explicitly free the interval tree here... */ | |
1601 | } | |
33f7013e | 1602 | |
2f3f993b RS |
1603 | /* Reset the local variables, so that this buffer's local values |
1604 | won't be protected from GC. They would be protected | |
1605 | if they happened to remain encached in their symbols. | |
1606 | This gets rid of them for certain. */ | |
1607 | swap_out_buffer_local_variables (b); | |
13de9290 | 1608 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1609 | |
1ab256cb | 1610 | b->name = Qnil; |
336cd056 | 1611 | |
9ac0d9e0 | 1612 | BLOCK_INPUT; |
336cd056 | 1613 | if (! b->base_buffer) |
b86af064 | 1614 | free_buffer_text (b); |
336cd056 | 1615 | |
28e969dd JB |
1616 | if (b->newline_cache) |
1617 | { | |
1618 | free_region_cache (b->newline_cache); | |
1619 | b->newline_cache = 0; | |
1620 | } | |
1621 | if (b->width_run_cache) | |
1622 | { | |
1623 | free_region_cache (b->width_run_cache); | |
1624 | b->width_run_cache = 0; | |
1625 | } | |
1626 | b->width_table = Qnil; | |
9ac0d9e0 | 1627 | UNBLOCK_INPUT; |
1ab256cb RM |
1628 | b->undo_list = Qnil; |
1629 | ||
1630 | return Qt; | |
1631 | } | |
1632 | \f | |
36a8c287 JB |
1633 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1634 | we do this each time BUF is selected visibly, the more recently | |
1635 | selected buffers are always closer to the front of the list. This | |
1636 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1637 | |
01136e9b | 1638 | void |
1ab256cb RM |
1639 | record_buffer (buf) |
1640 | Lisp_Object buf; | |
1641 | { | |
1642 | register Lisp_Object link, prev; | |
773fbdb9 | 1643 | Lisp_Object frame; |
9ba9623d | 1644 | frame = selected_frame; |
1ab256cb RM |
1645 | |
1646 | prev = Qnil; | |
7539e11f | 1647 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1648 | { |
7539e11f | 1649 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1650 | break; |
1651 | prev = link; | |
1652 | } | |
1653 | ||
36a8c287 JB |
1654 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1655 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1656 | |
265a9e55 | 1657 | if (NILP (prev)) |
7539e11f | 1658 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1659 | else |
f3fbd155 | 1660 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1661 | |
f3fbd155 | 1662 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1663 | Vbuffer_alist = link; |
7962a441 | 1664 | |
a18b8cb5 | 1665 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1666 | |
a18b8cb5 KL |
1667 | prev = Qnil; |
1668 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1669 | link = XCDR (link)) | |
1670 | { | |
1671 | if (EQ (XCAR (link), buf)) | |
1672 | { | |
1673 | if (NILP (prev)) | |
1674 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1675 | else | |
1676 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1677 | break; | |
1678 | } | |
1679 | prev = link; | |
1680 | } | |
1681 | ||
7962a441 RS |
1682 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1683 | ||
1684 | prev = Qnil; | |
773fbdb9 | 1685 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1686 | link = XCDR (link)) |
7962a441 | 1687 | { |
7539e11f | 1688 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1689 | break; |
1690 | prev = link; | |
1691 | } | |
1692 | ||
1693 | /* Effectively do delq. */ | |
1694 | ||
1695 | if (CONSP (link)) | |
1696 | { | |
1697 | if (NILP (prev)) | |
773fbdb9 | 1698 | set_frame_buffer_list (frame, |
7539e11f | 1699 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1700 | else |
f3fbd155 | 1701 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1702 | |
f3fbd155 | 1703 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1704 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1705 | } |
1706 | else | |
773fbdb9 | 1707 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1708 | } |
1709 | ||
a9ee7a59 | 1710 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1711 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1712 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1713 | according to `default-major-mode'. |
018ba359 | 1714 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1715 | the current buffer's major mode. */) |
1716 | (buffer) | |
a2428fa2 | 1717 | Lisp_Object buffer; |
a9ee7a59 KH |
1718 | { |
1719 | int count; | |
1720 | Lisp_Object function; | |
1721 | ||
ea4fddd8 JB |
1722 | CHECK_BUFFER (buffer); |
1723 | ||
71a0f2c6 | 1724 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1725 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1726 | function = find_symbol_value (intern ("initial-major-mode")); |
1727 | else | |
1728 | { | |
1729 | function = buffer_defaults.major_mode; | |
1730 | if (NILP (function) | |
1731 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1732 | function = current_buffer->major_mode; | |
1733 | } | |
177c0ea7 | 1734 | |
48265e61 DL |
1735 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1736 | return Qnil; | |
1737 | ||
aed13378 | 1738 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1739 | |
48265e61 DL |
1740 | /* To select a nonfundamental mode, |
1741 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1742 | |
1743 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1744 | ||
a2428fa2 | 1745 | Fset_buffer (buffer); |
48265e61 | 1746 | call0 (function); |
a9ee7a59 KH |
1747 | |
1748 | return unbind_to (count, Qnil); | |
1749 | } | |
1750 | ||
2594e0fd RS |
1751 | /* Switch to buffer BUFFER in the selected window. |
1752 | If NORECORD is non-nil, don't call record_buffer. */ | |
1753 | ||
1754 | Lisp_Object | |
c8804c4f MR |
1755 | switch_to_buffer_1 (buffer_or_name, norecord) |
1756 | Lisp_Object buffer_or_name, norecord; | |
2594e0fd | 1757 | { |
c8804c4f | 1758 | register Lisp_Object buffer; |
1ab256cb | 1759 | |
c8804c4f MR |
1760 | if (NILP (buffer_or_name)) |
1761 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1762 | else |
a9ee7a59 | 1763 | { |
c8804c4f MR |
1764 | buffer = Fget_buffer (buffer_or_name); |
1765 | if (NILP (buffer)) | |
a9ee7a59 | 1766 | { |
c8804c4f MR |
1767 | buffer = Fget_buffer_create (buffer_or_name); |
1768 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1769 | } |
1770 | } | |
c8804c4f | 1771 | Fset_buffer (buffer); |
265a9e55 | 1772 | if (NILP (norecord)) |
c8804c4f | 1773 | record_buffer (buffer); |
1ab256cb RM |
1774 | |
1775 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1776 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1777 | : selected_window, | |
c8804c4f | 1778 | buffer, Qnil); |
1ab256cb | 1779 | |
c8804c4f | 1780 | return buffer; |
1ab256cb RM |
1781 | } |
1782 | ||
88970542 JL |
1783 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1784 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1785 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1786 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1787 | nil. Return the buffer switched to. | |
a6dced2a | 1788 | |
ee50ff07 MR |
1789 | If BUFFER-OR-NAME is a string and does not identify an existing |
1790 | buffer, create a new buffer with that name. Interactively, if | |
1791 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1792 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1793 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1794 | |
ee50ff07 MR |
1795 | Optional second arg NORECORD non-nil means do not put this buffer |
1796 | at the front of the list of recently selected ones. This | |
1797 | function returns the buffer it switched to as a Lisp object. | |
1798 | ||
1799 | If the selected window is the minibuffer window or dedicated to | |
1800 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1801 | |
1802 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1803 | within a Lisp program! Use `set-buffer' instead. That avoids |
1804 | messing with the window-buffer correspondences. */) | |
c8804c4f MR |
1805 | (buffer_or_name, norecord) |
1806 | Lisp_Object buffer_or_name, norecord; | |
2594e0fd RS |
1807 | { |
1808 | char *err; | |
1809 | ||
c8804c4f | 1810 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1811 | { |
611ac521 RS |
1812 | /* Basically a NOP. Avoid signalling an error in the case where |
1813 | the selected window is dedicated, or a minibuffer. */ | |
1814 | ||
c8804c4f MR |
1815 | /* But do put this buffer at the front of the buffer list, unless |
1816 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1817 | at the front of the main buffer-list already, we still want to | |
1818 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1819 | if (NILP (norecord)) |
c8804c4f MR |
1820 | record_buffer (buffer_or_name); |
1821 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1822 | } |
61313fa3 SM |
1823 | else if (EQ (minibuf_window, selected_window) |
1824 | /* If `dedicated' is neither nil nor t, it means it's | |
1825 | dedicatedness can be overridden by an explicit request | |
1826 | such as a call to switch-to-buffer. */ | |
1827 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1828 | /* We can't use the selected window so let `pop-to-buffer' try some |
1829 | other window. */ | |
1830 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1831 | else | |
1832 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1833 | } |
1834 | ||
1ab256cb | 1835 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 MB |
1836 | doc: /* Return the current buffer as a Lisp object. */) |
1837 | () | |
1ab256cb RM |
1838 | { |
1839 | register Lisp_Object buf; | |
67180c6a | 1840 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1841 | return buf; |
1842 | } | |
1843 | \f | |
7ec44ec6 GM |
1844 | /* Set the current buffer to B. |
1845 | ||
1846 | We previously set windows_or_buffers_changed here to invalidate | |
1847 | global unchanged information in beg_unchanged and end_unchanged. | |
1848 | This is no longer necessary because we now compute unchanged | |
1849 | information on a buffer-basis. Every action affecting other | |
1850 | windows than the selected one requires a select_window at some | |
1851 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1852 | |
1853 | void | |
1854 | set_buffer_internal (b) | |
1855 | register struct buffer *b; | |
1856 | { | |
b5a225b4 | 1857 | if (current_buffer != b) |
7ec44ec6 | 1858 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1859 | } |
1860 | ||
1861 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1862 | This is used by redisplay. */ | |
1863 | ||
1864 | void | |
1865 | set_buffer_internal_1 (b) | |
1866 | register struct buffer *b; | |
1867 | { | |
1868 | register struct buffer *old_buf; | |
1869 | register Lisp_Object tail, valcontents; | |
1870 | Lisp_Object tem; | |
1871 | ||
b86af064 | 1872 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1873 | if (b->text->beg == NULL) |
b86af064 GM |
1874 | enlarge_buffer_text (b, 0); |
1875 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1876 | |
c7aa5005 KH |
1877 | if (current_buffer == b) |
1878 | return; | |
1879 | ||
1ab256cb RM |
1880 | old_buf = current_buffer; |
1881 | current_buffer = b; | |
1882 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1883 | ||
336cd056 RS |
1884 | if (old_buf) |
1885 | { | |
1886 | /* Put the undo list back in the base buffer, so that it appears | |
1887 | that an indirect buffer shares the undo list of its base. */ | |
1888 | if (old_buf->base_buffer) | |
1889 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1890 | ||
1891 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1892 | when it is not current, update them now. */ | |
1893 | if (! NILP (old_buf->pt_marker)) | |
1894 | { | |
1895 | Lisp_Object obuf; | |
1896 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1897 | set_marker_both (old_buf->pt_marker, obuf, |
1898 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1899 | } |
1900 | if (! NILP (old_buf->begv_marker)) | |
1901 | { | |
1902 | Lisp_Object obuf; | |
1903 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1904 | set_marker_both (old_buf->begv_marker, obuf, |
1905 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1906 | } |
1907 | if (! NILP (old_buf->zv_marker)) | |
1908 | { | |
1909 | Lisp_Object obuf; | |
1910 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1911 | set_marker_both (old_buf->zv_marker, obuf, |
1912 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1913 | } |
1914 | } | |
1915 | ||
1916 | /* Get the undo list from the base buffer, so that it appears | |
1917 | that an indirect buffer shares the undo list of its base. */ | |
1918 | if (b->base_buffer) | |
1919 | b->undo_list = b->base_buffer->undo_list; | |
1920 | ||
1921 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1922 | when it is not current, fetch them now. */ | |
1923 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1924 | { |
1925 | BUF_PT (b) = marker_position (b->pt_marker); | |
1926 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1927 | } | |
336cd056 | 1928 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1929 | { |
1930 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1931 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1932 | } | |
336cd056 | 1933 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1934 | { |
1935 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1936 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1937 | } | |
336cd056 | 1938 | |
1ab256cb RM |
1939 | /* Look down buffer's list of local Lisp variables |
1940 | to find and update any that forward into C variables. */ | |
1941 | ||
65745fad | 1942 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1943 | { |
b5b98ff4 CY |
1944 | if (CONSP (XCAR (tail)) |
1945 | && SYMBOLP (XCAR (XCAR (tail))) | |
1946 | && (valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))), | |
1947 | (BUFFER_LOCAL_VALUEP (valcontents))) | |
3d871c85 | 1948 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1949 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
b5b98ff4 CY |
1950 | /* Just reference the variable to cause it to become set for |
1951 | this buffer. */ | |
7539e11f | 1952 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1953 | } |
1954 | ||
1955 | /* Do the same with any others that were local to the previous buffer */ | |
1956 | ||
1957 | if (old_buf) | |
65745fad | 1958 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1959 | { |
b5b98ff4 CY |
1960 | if (CONSP (tail) |
1961 | && SYMBOLP (XCAR (XCAR (tail))) | |
1962 | && (valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))), | |
1963 | (BUFFER_LOCAL_VALUEP (valcontents))) | |
3d871c85 | 1964 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1965 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
b5b98ff4 CY |
1966 | /* Just reference the variable to cause it to become set for |
1967 | this buffer. */ | |
7539e11f | 1968 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1969 | } |
1970 | } | |
1971 | ||
336cd056 | 1972 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1973 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1974 | |
1975 | void | |
1976 | set_buffer_temp (b) | |
1977 | struct buffer *b; | |
1978 | { | |
1979 | register struct buffer *old_buf; | |
1980 | ||
1981 | if (current_buffer == b) | |
1982 | return; | |
1983 | ||
1984 | old_buf = current_buffer; | |
1985 | current_buffer = b; | |
1986 | ||
1987 | if (old_buf) | |
1988 | { | |
1989 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1990 | when it is not current, update them now. */ | |
1991 | if (! NILP (old_buf->pt_marker)) | |
1992 | { | |
1993 | Lisp_Object obuf; | |
1994 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1995 | set_marker_both (old_buf->pt_marker, obuf, |
1996 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1997 | } |
1998 | if (! NILP (old_buf->begv_marker)) | |
1999 | { | |
2000 | Lisp_Object obuf; | |
2001 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
2002 | set_marker_both (old_buf->begv_marker, obuf, |
2003 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
2004 | } |
2005 | if (! NILP (old_buf->zv_marker)) | |
2006 | { | |
2007 | Lisp_Object obuf; | |
2008 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
2009 | set_marker_both (old_buf->zv_marker, obuf, |
2010 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
2011 | } |
2012 | } | |
2013 | ||
2014 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2015 | when it is not current, fetch them now. */ | |
2016 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
2017 | { |
2018 | BUF_PT (b) = marker_position (b->pt_marker); | |
2019 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
2020 | } | |
336cd056 | 2021 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
2022 | { |
2023 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
2024 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
2025 | } | |
336cd056 | 2026 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
2027 | { |
2028 | BUF_ZV (b) = marker_position (b->zv_marker); | |
2029 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
2030 | } | |
336cd056 RS |
2031 | } |
2032 | ||
1ab256cb | 2033 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
2034 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
2035 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
2036 | also `save-excursion' when you want to make a buffer current | |
2037 | temporarily. This function does not display the buffer, so its effect | |
2038 | ends when the current command terminates. Use `switch-to-buffer' or | |
2039 | `pop-to-buffer' to switch buffers permanently. */) | |
2040 | (buffer_or_name) | |
2041 | register Lisp_Object buffer_or_name; | |
1ab256cb | 2042 | { |
c8804c4f MR |
2043 | register Lisp_Object buffer; |
2044 | buffer = Fget_buffer (buffer_or_name); | |
2045 | if (NILP (buffer)) | |
2046 | nsberror (buffer_or_name); | |
2047 | if (NILP (XBUFFER (buffer)->name)) | |
1ab256cb | 2048 | error ("Selecting deleted buffer"); |
c8804c4f MR |
2049 | set_buffer_internal (XBUFFER (buffer)); |
2050 | return buffer; | |
1ab256cb | 2051 | } |
d0628b06 RS |
2052 | |
2053 | /* Set the current buffer to BUFFER provided it is alive. */ | |
2054 | ||
2055 | Lisp_Object | |
2056 | set_buffer_if_live (buffer) | |
2057 | Lisp_Object buffer; | |
2058 | { | |
2059 | if (! NILP (XBUFFER (buffer)->name)) | |
2060 | Fset_buffer (buffer); | |
2061 | return Qnil; | |
2062 | } | |
1ab256cb RM |
2063 | \f |
2064 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
2065 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
2066 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
2067 | () | |
1ab256cb | 2068 | { |
a96b68f1 RS |
2069 | if (!NILP (current_buffer->read_only) |
2070 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2071 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2072 | return Qnil; |
2073 | } | |
2074 | ||
2075 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 2076 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 2077 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
2078 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
2079 | default. | |
2080 | ||
2081 | The argument may be a buffer name or an actual buffer object. If | |
2082 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
2083 | from the selected window if it is displayed there. If the selected |
2084 | window is dedicated to its buffer, delete that window if there are other | |
2085 | windows on the same frame. If the selected window is the only window on | |
2086 | its frame, iconify that frame. */) | |
c8804c4f MR |
2087 | (buffer_or_name) |
2088 | register Lisp_Object buffer_or_name; | |
1ab256cb | 2089 | { |
c8804c4f MR |
2090 | Lisp_Object buffer; |
2091 | ||
b271272a | 2092 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 2093 | if (NILP (buffer_or_name)) |
a5611885 | 2094 | { |
c58dab63 | 2095 | Lisp_Object tem; |
a2428fa2 | 2096 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2097 | |
c58dab63 | 2098 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2099 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2100 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2101 | { |
2102 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2103 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2104 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2105 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2106 | else | |
2107 | Fdelete_window (selected_window); | |
2108 | } | |
a5611885 | 2109 | } |
1ab256cb RM |
2110 | else |
2111 | { | |
c8804c4f MR |
2112 | buffer = Fget_buffer (buffer_or_name); |
2113 | if (NILP (buffer)) | |
2114 | nsberror (buffer_or_name); | |
b271272a JB |
2115 | } |
2116 | ||
a1a8b28e GM |
2117 | /* Move buffer to the end of the buffer list. Do nothing if the |
2118 | buffer is killed. */ | |
2119 | if (!NILP (XBUFFER (buffer)->name)) | |
2120 | { | |
2121 | Lisp_Object aelt, link; | |
b271272a | 2122 | |
a1a8b28e GM |
2123 | aelt = Frassq (buffer, Vbuffer_alist); |
2124 | link = Fmemq (aelt, Vbuffer_alist); | |
2125 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2126 | XSETCDR (link, Qnil); |
a1a8b28e | 2127 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2128 | |
a18b8cb5 KL |
2129 | XFRAME (selected_frame)->buffer_list |
2130 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2131 | XFRAME (selected_frame)->buried_buffer_list | |
2132 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2133 | } |
dec989eb | 2134 | |
1ab256cb RM |
2135 | return Qnil; |
2136 | } | |
2137 | \f | |
c922bc55 | 2138 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2139 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2140 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2141 | so the buffer is truly empty after this. */) |
2142 | () | |
1ab256cb RM |
2143 | { |
2144 | Fwiden (); | |
c0d9a0c3 GM |
2145 | |
2146 | del_range (BEG, Z); | |
c280bc6a | 2147 | |
1ab256cb RM |
2148 | current_buffer->last_window_start = 1; |
2149 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2150 | if future size is less than past size. Use of erase-buffer | |
2151 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2152 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2153 | return Qnil; |
2154 | } | |
2155 | ||
01136e9b | 2156 | void |
1ab256cb RM |
2157 | validate_region (b, e) |
2158 | register Lisp_Object *b, *e; | |
2159 | { | |
b7826503 PJ |
2160 | CHECK_NUMBER_COERCE_MARKER (*b); |
2161 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2162 | |
2163 | if (XINT (*b) > XINT (*e)) | |
2164 | { | |
03192067 KH |
2165 | Lisp_Object tem; |
2166 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2167 | } |
2168 | ||
2169 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2170 | && XINT (*e) <= ZV)) | |
2171 | args_out_of_range (*b, *e); | |
2172 | } | |
2173 | \f | |
b05525fa RS |
2174 | /* Advance BYTE_POS up to a character boundary |
2175 | and return the adjusted position. */ | |
2176 | ||
2177 | static int | |
2178 | advance_to_char_boundary (byte_pos) | |
2179 | int byte_pos; | |
2180 | { | |
f8449323 | 2181 | int c; |
b05525fa | 2182 | |
f8449323 RS |
2183 | if (byte_pos == BEG) |
2184 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2185 | return BEG; |
f8449323 RS |
2186 | |
2187 | c = FETCH_BYTE (byte_pos); | |
2188 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2189 | { |
1be6387d | 2190 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2191 | multibyte sequence. */ |
a9bcded1 KH |
2192 | int orig_byte_pos = byte_pos; |
2193 | ||
2194 | do | |
2195 | { | |
2196 | byte_pos--; | |
2197 | c = FETCH_BYTE (byte_pos); | |
2198 | } | |
2199 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2200 | INC_POS (byte_pos); |
a9bcded1 KH |
2201 | if (byte_pos < orig_byte_pos) |
2202 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2203 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2204 | surely advance to the correct character boundary. If C is | |
2205 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2206 | } |
2207 | ||
20773569 | 2208 | return byte_pos; |
b05525fa RS |
2209 | } |
2210 | ||
baae5c2d | 2211 | #ifdef REL_ALLOC |
40b615d6 | 2212 | extern void r_alloc_reset_variable P_ ((POINTER_TYPE *, POINTER_TYPE *)); |
baae5c2d JR |
2213 | #endif /* REL_ALLOC */ |
2214 | ||
13cda5f9 SM |
2215 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2216 | 1, 1, 0, | |
2217 | doc: /* Swap the text between current buffer and BUFFER. */) | |
2218 | (buffer) | |
2219 | Lisp_Object buffer; | |
2220 | { | |
2221 | struct buffer *other_buffer; | |
2222 | CHECK_BUFFER (buffer); | |
2223 | other_buffer = XBUFFER (buffer); | |
2224 | ||
dc9cc574 CY |
2225 | if (NILP (other_buffer->name)) |
2226 | error ("Cannot swap a dead buffer's text"); | |
2227 | ||
13cda5f9 SM |
2228 | /* Actually, it probably works just fine. |
2229 | * if (other_buffer == current_buffer) | |
2230 | * error ("Cannot swap a buffer's text with itself"); */ | |
2231 | ||
2232 | /* Actually, this may be workable as well, tho probably only if they're | |
2233 | *both* indirect. */ | |
2234 | if (other_buffer->base_buffer | |
2235 | || current_buffer->base_buffer) | |
2236 | error ("Cannot swap indirect buffers's text"); | |
2237 | ||
2238 | { /* This is probably harder to make work. */ | |
2239 | struct buffer *other; | |
2240 | for (other = all_buffers; other; other = other->next) | |
2241 | if (other->base_buffer == other_buffer | |
2242 | || other->base_buffer == current_buffer) | |
2243 | error ("One of the buffers to swap has indirect buffers"); | |
2244 | } | |
2245 | ||
2246 | #define swapfield(field, type) \ | |
2247 | do { \ | |
2248 | type tmp##field = other_buffer->field; \ | |
2249 | other_buffer->field = current_buffer->field; \ | |
2250 | current_buffer->field = tmp##field; \ | |
2251 | } while (0) | |
2252 | ||
2253 | swapfield (own_text, struct buffer_text); | |
2254 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2255 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2256 | #ifdef REL_ALLOC |
40b615d6 JR |
2257 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2258 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2259 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2260 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2261 | #endif /* REL_ALLOC */ |
2262 | ||
13cda5f9 SM |
2263 | swapfield (pt, EMACS_INT); |
2264 | swapfield (pt_byte, EMACS_INT); | |
2265 | swapfield (begv, EMACS_INT); | |
2266 | swapfield (begv_byte, EMACS_INT); | |
2267 | swapfield (zv, EMACS_INT); | |
2268 | swapfield (zv_byte, EMACS_INT); | |
2269 | eassert (!current_buffer->base_buffer); | |
2270 | eassert (!other_buffer->base_buffer); | |
2271 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2272 | swapfield (newline_cache, struct region_cache *); | |
2273 | swapfield (width_run_cache, struct region_cache *); | |
2274 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2275 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2276 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2277 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2278 | swapfield (overlay_center, EMACS_INT); | |
2279 | swapfield (undo_list, Lisp_Object); | |
2280 | swapfield (mark, Lisp_Object); | |
13cda5f9 SM |
2281 | swapfield (enable_multibyte_characters, Lisp_Object); |
2282 | /* FIXME: Not sure what we should do with these *_marker fields. | |
2283 | Hopefully they're just nil anyway. */ | |
2284 | swapfield (pt_marker, Lisp_Object); | |
2285 | swapfield (begv_marker, Lisp_Object); | |
2286 | swapfield (zv_marker, Lisp_Object); | |
2287 | current_buffer->point_before_scroll = Qnil; | |
2288 | other_buffer->point_before_scroll = Qnil; | |
2289 | ||
2290 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2291 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2292 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2293 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2294 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2295 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2296 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2297 | { |
2298 | struct Lisp_Marker *m; | |
2299 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2300 | if (m->buffer == other_buffer) | |
2301 | m->buffer = current_buffer; | |
b8ff72fa SM |
2302 | else |
2303 | /* Since there's no indirect buffer in sight, markers on | |
2304 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2305 | eassert (!m->buffer); | |
13cda5f9 SM |
2306 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2307 | if (m->buffer == current_buffer) | |
2308 | m->buffer = other_buffer; | |
b8ff72fa SM |
2309 | else |
2310 | /* Since there's no indirect buffer in sight, markers on | |
2311 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2312 | eassert (!m->buffer); | |
13cda5f9 | 2313 | } |
126f1fc1 SM |
2314 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2315 | So since we just swapped the markers between the two buffers, we need | |
2316 | to undo the effect of this swap for window markers. */ | |
2317 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2318 | Lisp_Object buf1, buf2; | |
2319 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2320 | ||
2321 | while (NILP (Fmemq (w, ws))) | |
2322 | { | |
2323 | ws = Fcons (w, ws); | |
2324 | if (MARKERP (XWINDOW (w)->pointm) | |
2325 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2326 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2327 | Fset_marker (XWINDOW (w)->pointm, | |
2328 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2329 | XWINDOW (w)->buffer); | |
2330 | w = Fnext_window (w, Qt, Qt); | |
2331 | } | |
2332 | } | |
2333 | ||
13cda5f9 SM |
2334 | if (current_buffer->text->intervals) |
2335 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2336 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2337 | if (other_buffer->text->intervals) | |
2338 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2339 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2340 | ||
2341 | return Qnil; | |
2342 | } | |
2343 | ||
3ac81adb RS |
2344 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2345 | 1, 1, 0, | |
7ee72033 | 2346 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2347 | If FLAG is t, this makes the buffer a multibyte buffer. |
2348 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2349 | In these cases, the buffer contents remain unchanged as a sequence of |
2350 | bytes but the contents viewed as characters do change. | |
2351 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2352 | all eight-bit bytes to eight-bit characters. |
2353 | If the multibyte flag was really changed, undo information of the | |
2354 | current buffer is cleared. */) | |
7ee72033 | 2355 | (flag) |
3ac81adb RS |
2356 | Lisp_Object flag; |
2357 | { | |
65745fad | 2358 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2359 | struct buffer *other; |
458c8af4 | 2360 | int begv, zv; |
8d1203ea | 2361 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2362 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2363 | Lisp_Object old_undo = current_buffer->undo_list; |
2364 | struct gcpro gcpro1; | |
3ac81adb | 2365 | |
6e553d5e RS |
2366 | if (current_buffer->base_buffer) |
2367 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2368 | ||
70e77119 AS |
2369 | /* Do nothing if nothing actually changes. */ |
2370 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2371 | return flag; | |
2372 | ||
38babc07 KS |
2373 | GCPRO1 (old_undo); |
2374 | ||
2375 | /* Don't record these buffer changes. We will put a special undo entry | |
2376 | instead. */ | |
2377 | current_buffer->undo_list = Qt; | |
b05525fa | 2378 | |
3ac81adb RS |
2379 | /* If the cached position is for this buffer, clear it out. */ |
2380 | clear_charpos_cache (current_buffer); | |
2381 | ||
458c8af4 KH |
2382 | if (NILP (flag)) |
2383 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2384 | else | |
2385 | begv = BEGV, zv = ZV; | |
2386 | ||
a9bcded1 KH |
2387 | if (narrowed) |
2388 | Fwiden (); | |
2389 | ||
3ac81adb RS |
2390 | if (NILP (flag)) |
2391 | { | |
a9bcded1 KH |
2392 | int pos, stop; |
2393 | unsigned char *p; | |
2394 | ||
3ac81adb RS |
2395 | /* Do this first, so it can use CHAR_TO_BYTE |
2396 | to calculate the old correspondences. */ | |
2397 | set_intervals_multibyte (0); | |
2398 | ||
2399 | current_buffer->enable_multibyte_characters = Qnil; | |
2400 | ||
2401 | Z = Z_BYTE; | |
2402 | BEGV = BEGV_BYTE; | |
2403 | ZV = ZV_BYTE; | |
2404 | GPT = GPT_BYTE; | |
2405 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2406 | ||
60ebfdf3 | 2407 | |
65745fad SM |
2408 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2409 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2410 | |
2411 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2412 | pos = BEG; | |
2413 | stop = GPT; | |
2414 | p = BEG_ADDR; | |
2415 | while (1) | |
2416 | { | |
2417 | int c, bytes; | |
2418 | ||
2419 | if (pos == stop) | |
2420 | { | |
2421 | if (pos == Z) | |
2422 | break; | |
2423 | p = GAP_END_ADDR; | |
2424 | stop = Z; | |
2425 | } | |
8f348ed5 KH |
2426 | if (ASCII_BYTE_P (*p)) |
2427 | p++, pos++; | |
2428 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2429 | { |
62a6e103 | 2430 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 KH |
2431 | /* Delete all bytes for this 8-bit character but the |
2432 | last one, and change the last one to the charcter | |
2433 | code. */ | |
2434 | bytes--; | |
2435 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2436 | p = GAP_END_ADDR; | |
2437 | *p++ = c; | |
2438 | pos++; | |
2439 | if (begv > pos) | |
2440 | begv -= bytes; | |
2441 | if (zv > pos) | |
2442 | zv -= bytes; | |
2443 | stop = Z; | |
2444 | } | |
8f924df7 | 2445 | else |
8f348ed5 KH |
2446 | { |
2447 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2448 | p += bytes, pos += bytes; | |
2449 | } | |
a9bcded1 KH |
2450 | } |
2451 | if (narrowed) | |
2452 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2453 | } |
2454 | else | |
2455 | { | |
a9bcded1 KH |
2456 | int pt = PT; |
2457 | int pos, stop; | |
8f348ed5 | 2458 | unsigned char *p, *pend; |
a9bcded1 | 2459 | |
673c57d2 | 2460 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2461 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2462 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2463 | |
8f924df7 | 2464 | if (EQ (flag, Qt) |
a3a303df | 2465 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2466 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2467 | { | |
2468 | unsigned char *p = GPT_ADDR - 1; | |
2469 | ||
2470 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2471 | if (BASE_LEADING_CODE_P (*p)) | |
2472 | { | |
2473 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2474 | ||
2475 | move_gap_both (new_gpt, new_gpt); | |
2476 | } | |
2477 | } | |
2478 | ||
a9bcded1 KH |
2479 | /* Make the buffer contents valid as multibyte by converting |
2480 | 8-bit characters to multibyte form. */ | |
2481 | pos = BEG; | |
2482 | stop = GPT; | |
2483 | p = BEG_ADDR; | |
8f348ed5 | 2484 | pend = GPT_ADDR; |
a9bcded1 KH |
2485 | while (1) |
2486 | { | |
2487 | int bytes; | |
2488 | ||
2489 | if (pos == stop) | |
2490 | { | |
2491 | if (pos == Z) | |
2492 | break; | |
2493 | p = GAP_END_ADDR; | |
8f348ed5 | 2494 | pend = Z_ADDR; |
a9bcded1 KH |
2495 | stop = Z; |
2496 | } | |
177c0ea7 | 2497 | |
a3a303df KH |
2498 | if (ASCII_BYTE_P (*p)) |
2499 | p++, pos++; | |
8f924df7 | 2500 | else if (EQ (flag, Qt) && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) |
a9bcded1 KH |
2501 | p += bytes, pos += bytes; |
2502 | else | |
2503 | { | |
2504 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2505 | int c; |
a9bcded1 | 2506 | |
8f924df7 | 2507 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2508 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2509 | *p = tmp[0]; |
2510 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2511 | bytes--; | |
2512 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2513 | /* Now the gap is after the just inserted data. */ | |
2514 | pos = GPT; | |
2515 | p = GAP_END_ADDR; | |
2516 | if (pos <= begv) | |
2517 | begv += bytes; | |
2518 | if (pos <= zv) | |
2519 | zv += bytes; | |
2520 | if (pos <= pt) | |
2521 | pt += bytes; | |
31285a8f | 2522 | pend = Z_ADDR; |
a9bcded1 KH |
2523 | stop = Z; |
2524 | } | |
2525 | } | |
2526 | ||
2527 | if (pt != PT) | |
2528 | TEMP_SET_PT (pt); | |
2529 | ||
2530 | if (narrowed) | |
2531 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2532 | ||
3ac81adb RS |
2533 | /* Do this first, so that chars_in_text asks the right question. |
2534 | set_intervals_multibyte needs it too. */ | |
2535 | current_buffer->enable_multibyte_characters = Qt; | |
2536 | ||
b05525fa | 2537 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2538 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2539 | |
673c57d2 | 2540 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2541 | |
2542 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2543 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2544 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2545 | else |
2546 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2547 | |
2548 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2549 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2550 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2551 | else |
2552 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2553 | |
2554 | { | |
2555 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2556 | int pt; | |
2557 | ||
2558 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2559 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2560 | else |
2561 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2562 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2563 | } | |
3ac81adb RS |
2564 | |
2565 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2566 | |
2567 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2568 | getting confused by the markers that have not yet been updated. | |
2569 | It is also a signal that it should never create a marker. */ | |
65745fad | 2570 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2571 | |
65745fad | 2572 | for (; tail; tail = tail->next) |
3ac81adb | 2573 | { |
65745fad SM |
2574 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2575 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2576 | } |
b69f9797 RS |
2577 | |
2578 | /* Make sure no markers were put on the chain | |
2579 | while the chain value was incorrect. */ | |
65745fad | 2580 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2581 | abort (); |
2582 | ||
3ac81adb RS |
2583 | BUF_MARKERS (current_buffer) = markers; |
2584 | ||
2585 | /* Do this last, so it can calculate the new correspondences | |
2586 | between chars and bytes. */ | |
2587 | set_intervals_multibyte (1); | |
2588 | } | |
2589 | ||
38babc07 KS |
2590 | if (!EQ (old_undo, Qt)) |
2591 | { | |
2592 | /* Represent all the above changes by a special undo entry. */ | |
2593 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2594 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2595 | intern ("set-buffer-multibyte"), | |
2596 | NILP (flag) ? Qt : Qnil), | |
2597 | old_undo); | |
38babc07 KS |
2598 | } |
2599 | ||
2600 | UNGCPRO; | |
a9bcded1 | 2601 | |
724b203f GM |
2602 | /* Changing the multibyteness of a buffer means that all windows |
2603 | showing that buffer must be updated thoroughly. */ | |
2604 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2605 | ++windows_or_buffers_changed; | |
2606 | ||
abc9d959 RS |
2607 | /* Copy this buffer's new multibyte status |
2608 | into all of its indirect buffers. */ | |
2609 | for (other = all_buffers; other; other = other->next) | |
2610 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2611 | { |
2612 | other->enable_multibyte_characters | |
2613 | = current_buffer->enable_multibyte_characters; | |
2614 | other->prevent_redisplay_optimizations_p = 1; | |
2615 | } | |
abc9d959 | 2616 | |
ed00559d KH |
2617 | /* Restore the modifiedness of the buffer. */ |
2618 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2619 | Fset_buffer_modified_p (Qnil); | |
2620 | ||
2a2b50a9 | 2621 | #ifdef subprocesses |
172f9454 KH |
2622 | /* Update coding systems of this buffer's process (if any). */ |
2623 | { | |
2624 | Lisp_Object process; | |
2625 | ||
2626 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2627 | if (PROCESSP (process)) | |
2628 | setup_process_coding_systems (process); | |
2629 | } | |
2a2b50a9 | 2630 | #endif /* subprocesses */ |
172f9454 | 2631 | |
3ac81adb RS |
2632 | return flag; |
2633 | } | |
2634 | \f | |
1ab256cb | 2635 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2636 | 0, 0, 0, |
7ee72033 | 2637 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2638 | Most local variable bindings are eliminated so that the default values |
2639 | become effective once more. Also, the syntax table is set from | |
2640 | `standard-syntax-table', the local keymap is set to nil, | |
2641 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2642 | This function also forces redisplay of the mode line. | |
2643 | ||
2644 | Every function to select a new major mode starts by | |
2645 | calling this function. | |
2646 | ||
2647 | As a special exception, local variables whose names have | |
2648 | a non-nil `permanent-local' property are not eliminated by this function. | |
2649 | ||
2650 | The first thing this function does is run | |
7ee72033 MB |
2651 | the normal hook `change-major-mode-hook'. */) |
2652 | () | |
1ab256cb | 2653 | { |
fd186f07 | 2654 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2655 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2656 | |
3709505e | 2657 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2658 | remain swapped in, in their symbols. */ |
1ab256cb | 2659 | |
2f3f993b | 2660 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2661 | |
2662 | /* Actually eliminate all local bindings of this buffer. */ | |
2663 | ||
13de9290 | 2664 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2665 | |
1ab256cb RM |
2666 | /* Force mode-line redisplay. Useful here because all major mode |
2667 | commands call this function. */ | |
2668 | update_mode_lines++; | |
2669 | ||
2670 | return Qnil; | |
2671 | } | |
2f3f993b RS |
2672 | |
2673 | /* Make sure no local variables remain set up with buffer B | |
2674 | for their current values. */ | |
2675 | ||
2676 | static void | |
2677 | swap_out_buffer_local_variables (b) | |
2678 | struct buffer *b; | |
2679 | { | |
b5b98ff4 | 2680 | Lisp_Object oalist, alist, sym, buffer; |
2f3f993b RS |
2681 | |
2682 | XSETBUFFER (buffer, b); | |
2683 | oalist = b->local_var_alist; | |
2684 | ||
67ee9f6e | 2685 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2686 | { |
b5b98ff4 CY |
2687 | if (CONSP (XCAR (alist)) |
2688 | && (sym = XCAR (XCAR (alist)), SYMBOLP (sym)) | |
2689 | /* Need not do anything if some other buffer's binding is | |
2690 | now encached. */ | |
2691 | && EQ (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer, | |
2692 | buffer)) | |
2f3f993b | 2693 | { |
e7c10f83 SM |
2694 | /* Symbol is set up for this buffer's old local value: |
2695 | swap it out! */ | |
2696 | swap_in_global_binding (sym); | |
2f3f993b RS |
2697 | } |
2698 | } | |
2699 | } | |
1ab256cb | 2700 | \f |
2eec3b4e | 2701 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2702 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2703 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2704 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2705 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2706 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2707 | or where an overlay starts which ends at or after POS; |
624d2678 | 2708 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2709 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2710 | |
2711 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2712 | when this function is called. |
2713 | ||
2714 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2715 | If EXTEND is zero, we never extend the vector, | |
2716 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2717 | But we still return the total number of overlays. |
2718 | ||
2719 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2720 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2721 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2722 | |
2723 | int | |
ac869cf7 | 2724 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2725 | EMACS_INT pos; |
61d54cd5 | 2726 | int extend; |
2eec3b4e RS |
2727 | Lisp_Object **vec_ptr; |
2728 | int *len_ptr; | |
0f8b27ea SM |
2729 | EMACS_INT *next_ptr; |
2730 | EMACS_INT *prev_ptr; | |
ac869cf7 | 2731 | int change_req; |
1ab256cb | 2732 | { |
2410d73a SM |
2733 | Lisp_Object overlay, start, end; |
2734 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2735 | int idx = 0; |
2736 | int len = *len_ptr; | |
2737 | Lisp_Object *vec = *vec_ptr; | |
2738 | int next = ZV; | |
239c932b | 2739 | int prev = BEGV; |
61d54cd5 RS |
2740 | int inhibit_storing = 0; |
2741 | ||
2410d73a | 2742 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2743 | { |
239c932b | 2744 | int startpos, endpos; |
52f8ec73 | 2745 | |
2410d73a | 2746 | XSETMISC (overlay, tail); |
1ab256cb | 2747 | |
2eec3b4e RS |
2748 | start = OVERLAY_START (overlay); |
2749 | end = OVERLAY_END (overlay); | |
239c932b RS |
2750 | endpos = OVERLAY_POSITION (end); |
2751 | if (endpos < pos) | |
2752 | { | |
2753 | if (prev < endpos) | |
2754 | prev = endpos; | |
2755 | break; | |
2756 | } | |
413e06a4 RS |
2757 | startpos = OVERLAY_POSITION (start); |
2758 | /* This one ends at or after POS | |
daa1c109 | 2759 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2760 | if (prev < startpos && startpos < pos) |
2761 | prev = startpos; | |
239c932b RS |
2762 | if (endpos == pos) |
2763 | continue; | |
2eec3b4e RS |
2764 | if (startpos <= pos) |
2765 | { | |
2766 | if (idx == len) | |
2767 | { | |
61d54cd5 RS |
2768 | /* The supplied vector is full. |
2769 | Either make it bigger, or don't store any more in it. */ | |
2770 | if (extend) | |
2771 | { | |
0552666b GM |
2772 | /* Make it work with an initial len == 0. */ |
2773 | len *= 2; | |
2774 | if (len == 0) | |
2775 | len = 4; | |
2776 | *len_ptr = len; | |
61d54cd5 RS |
2777 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2778 | *vec_ptr = vec; | |
2779 | } | |
2780 | else | |
2781 | inhibit_storing = 1; | |
2eec3b4e | 2782 | } |
61d54cd5 RS |
2783 | |
2784 | if (!inhibit_storing) | |
2785 | vec[idx] = overlay; | |
2786 | /* Keep counting overlays even if we can't return them all. */ | |
2787 | idx++; | |
2eec3b4e RS |
2788 | } |
2789 | else if (startpos < next) | |
2790 | next = startpos; | |
2791 | } | |
2792 | ||
2410d73a | 2793 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2794 | { |
239c932b | 2795 | int startpos, endpos; |
52f8ec73 | 2796 | |
2410d73a | 2797 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2798 | |
2799 | start = OVERLAY_START (overlay); | |
2800 | end = OVERLAY_END (overlay); | |
2801 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2802 | if (pos < startpos) |
2eec3b4e RS |
2803 | { |
2804 | if (startpos < next) | |
2805 | next = startpos; | |
2806 | break; | |
2807 | } | |
239c932b RS |
2808 | endpos = OVERLAY_POSITION (end); |
2809 | if (pos < endpos) | |
2eec3b4e RS |
2810 | { |
2811 | if (idx == len) | |
2812 | { | |
61d54cd5 RS |
2813 | if (extend) |
2814 | { | |
4b0e44fc RS |
2815 | /* Make it work with an initial len == 0. */ |
2816 | len *= 2; | |
0552666b | 2817 | if (len == 0) |
4b0e44fc RS |
2818 | len = 4; |
2819 | *len_ptr = len; | |
61d54cd5 RS |
2820 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2821 | *vec_ptr = vec; | |
2822 | } | |
2823 | else | |
2824 | inhibit_storing = 1; | |
2eec3b4e | 2825 | } |
61d54cd5 RS |
2826 | |
2827 | if (!inhibit_storing) | |
2828 | vec[idx] = overlay; | |
2829 | idx++; | |
413e06a4 RS |
2830 | |
2831 | if (startpos < pos && startpos > prev) | |
2832 | prev = startpos; | |
2eec3b4e | 2833 | } |
239c932b RS |
2834 | else if (endpos < pos && endpos > prev) |
2835 | prev = endpos; | |
1d5f4c1d MB |
2836 | else if (endpos == pos && startpos > prev |
2837 | && (!change_req || startpos < pos)) | |
413e06a4 | 2838 | prev = startpos; |
1ab256cb RM |
2839 | } |
2840 | ||
239c932b RS |
2841 | if (next_ptr) |
2842 | *next_ptr = next; | |
2843 | if (prev_ptr) | |
2844 | *prev_ptr = prev; | |
2eec3b4e RS |
2845 | return idx; |
2846 | } | |
74514898 | 2847 | \f |
7723e095 MR |
2848 | /* Find all the overlays in the current buffer that overlap the range |
2849 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2850 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2851 | |
177c0ea7 | 2852 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2853 | Store in *LEN_PTR the size allocated for the vector. |
2854 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2855 | or ZV if there are no more overlays. | |
2856 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2857 | or BEGV if there are no previous overlays. | |
2858 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2859 | ||
2860 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2861 | when this function is called. | |
2862 | ||
2863 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2864 | If EXTEND is zero, we never extend the vector, | |
2865 | and we store only as many overlays as will fit. | |
2866 | But we still return the total number of overlays. */ | |
2867 | ||
a9b9a780 | 2868 | static int |
74514898 RS |
2869 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2870 | int beg, end; | |
2871 | int extend; | |
2872 | Lisp_Object **vec_ptr; | |
2873 | int *len_ptr; | |
2874 | int *next_ptr; | |
2875 | int *prev_ptr; | |
2876 | { | |
2410d73a SM |
2877 | Lisp_Object overlay, ostart, oend; |
2878 | struct Lisp_Overlay *tail; | |
74514898 RS |
2879 | int idx = 0; |
2880 | int len = *len_ptr; | |
2881 | Lisp_Object *vec = *vec_ptr; | |
2882 | int next = ZV; | |
2883 | int prev = BEGV; | |
2884 | int inhibit_storing = 0; | |
7723e095 | 2885 | int end_is_Z = end == Z; |
74514898 | 2886 | |
2410d73a | 2887 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2888 | { |
2889 | int startpos, endpos; | |
2890 | ||
2410d73a | 2891 | XSETMISC (overlay, tail); |
74514898 RS |
2892 | |
2893 | ostart = OVERLAY_START (overlay); | |
2894 | oend = OVERLAY_END (overlay); | |
2895 | endpos = OVERLAY_POSITION (oend); | |
2896 | if (endpos < beg) | |
2897 | { | |
2898 | if (prev < endpos) | |
2899 | prev = endpos; | |
2900 | break; | |
2901 | } | |
2902 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2903 | /* Count an interval if it overlaps the range, is empty at the |
2904 | start of the range, or is empty at END provided END denotes the | |
2905 | end of the buffer. */ | |
74514898 | 2906 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2907 | || (startpos == endpos |
2908 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2909 | { |
2910 | if (idx == len) | |
2911 | { | |
2912 | /* The supplied vector is full. | |
2913 | Either make it bigger, or don't store any more in it. */ | |
2914 | if (extend) | |
2915 | { | |
4b0e44fc RS |
2916 | /* Make it work with an initial len == 0. */ |
2917 | len *= 2; | |
2918 | if (len == 0) | |
2919 | len = 4; | |
2920 | *len_ptr = len; | |
74514898 RS |
2921 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2922 | *vec_ptr = vec; | |
2923 | } | |
2924 | else | |
2925 | inhibit_storing = 1; | |
2926 | } | |
2927 | ||
2928 | if (!inhibit_storing) | |
2929 | vec[idx] = overlay; | |
2930 | /* Keep counting overlays even if we can't return them all. */ | |
2931 | idx++; | |
2932 | } | |
2933 | else if (startpos < next) | |
2934 | next = startpos; | |
2935 | } | |
2936 | ||
2410d73a | 2937 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2938 | { |
2939 | int startpos, endpos; | |
2940 | ||
2410d73a | 2941 | XSETMISC (overlay, tail); |
74514898 RS |
2942 | |
2943 | ostart = OVERLAY_START (overlay); | |
2944 | oend = OVERLAY_END (overlay); | |
2945 | startpos = OVERLAY_POSITION (ostart); | |
2946 | if (end < startpos) | |
2947 | { | |
2948 | if (startpos < next) | |
2949 | next = startpos; | |
2950 | break; | |
2951 | } | |
2952 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2953 | /* Count an interval if it overlaps the range, is empty at the |
2954 | start of the range, or is empty at END provided END denotes the | |
2955 | end of the buffer. */ | |
74514898 | 2956 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2957 | || (startpos == endpos |
2958 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2959 | { |
2960 | if (idx == len) | |
2961 | { | |
2962 | if (extend) | |
2963 | { | |
4b0e44fc RS |
2964 | /* Make it work with an initial len == 0. */ |
2965 | len *= 2; | |
2966 | if (len == 0) | |
2967 | len = 4; | |
2968 | *len_ptr = len; | |
74514898 RS |
2969 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2970 | *vec_ptr = vec; | |
2971 | } | |
2972 | else | |
2973 | inhibit_storing = 1; | |
2974 | } | |
2975 | ||
2976 | if (!inhibit_storing) | |
2977 | vec[idx] = overlay; | |
2978 | idx++; | |
2979 | } | |
2980 | else if (endpos < beg && endpos > prev) | |
2981 | prev = endpos; | |
2982 | } | |
fc04fa47 | 2983 | |
74514898 RS |
2984 | if (next_ptr) |
2985 | *next_ptr = next; | |
2986 | if (prev_ptr) | |
2987 | *prev_ptr = prev; | |
2988 | return idx; | |
2989 | } | |
09a22085 GM |
2990 | |
2991 | ||
2992 | /* Return non-zero if there exists an overlay with a non-nil | |
2993 | `mouse-face' property overlapping OVERLAY. */ | |
2994 | ||
2995 | int | |
2996 | mouse_face_overlay_overlaps (overlay) | |
2997 | Lisp_Object overlay; | |
2998 | { | |
2999 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3000 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 3001 | int n, i, size; |
09a22085 | 3002 | Lisp_Object *v, tem; |
177c0ea7 | 3003 | |
bfd8410f GM |
3004 | size = 10; |
3005 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
3006 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
3007 | if (n > size) | |
09a22085 | 3008 | { |
09a22085 GM |
3009 | v = (Lisp_Object *) alloca (n * sizeof *v); |
3010 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
3011 | } | |
3012 | ||
3013 | for (i = 0; i < n; ++i) | |
3014 | if (!EQ (v[i], overlay) | |
3015 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
3016 | !NILP (tem))) | |
3017 | break; | |
3018 | ||
3019 | return i < n; | |
3020 | } | |
3021 | ||
3022 | ||
74514898 | 3023 | \f |
fc04fa47 KH |
3024 | /* Fast function to just test if we're at an overlay boundary. */ |
3025 | int | |
3026 | overlay_touches_p (pos) | |
3027 | int pos; | |
3028 | { | |
2410d73a SM |
3029 | Lisp_Object overlay; |
3030 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3031 | |
2410d73a | 3032 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
3033 | { |
3034 | int endpos; | |
3035 | ||
2410d73a | 3036 | XSETMISC (overlay ,tail); |
8e50cc2d | 3037 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
3038 | abort (); |
3039 | ||
3040 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3041 | if (endpos < pos) | |
3042 | break; | |
3043 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3044 | return 1; | |
3045 | } | |
3046 | ||
2410d73a | 3047 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
3048 | { |
3049 | int startpos; | |
3050 | ||
2410d73a | 3051 | XSETMISC (overlay, tail); |
8e50cc2d | 3052 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
3053 | abort (); |
3054 | ||
3055 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3056 | if (pos < startpos) | |
3057 | break; | |
3058 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3059 | return 1; | |
3060 | } | |
3061 | return 0; | |
3062 | } | |
2eec3b4e | 3063 | \f |
5985d248 KH |
3064 | struct sortvec |
3065 | { | |
3066 | Lisp_Object overlay; | |
3067 | int beg, end; | |
3068 | int priority; | |
3069 | }; | |
3070 | ||
3071 | static int | |
dfcf069d AS |
3072 | compare_overlays (v1, v2) |
3073 | const void *v1, *v2; | |
5985d248 | 3074 | { |
dfcf069d AS |
3075 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3076 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
3077 | if (s1->priority != s2->priority) |
3078 | return s1->priority - s2->priority; | |
3079 | if (s1->beg != s2->beg) | |
3080 | return s1->beg - s2->beg; | |
3081 | if (s1->end != s2->end) | |
3082 | return s2->end - s1->end; | |
3083 | return 0; | |
3084 | } | |
3085 | ||
3086 | /* Sort an array of overlays by priority. The array is modified in place. | |
3087 | The return value is the new size; this may be smaller than the original | |
3088 | size if some of the overlays were invalid or were window-specific. */ | |
3089 | int | |
3090 | sort_overlays (overlay_vec, noverlays, w) | |
3091 | Lisp_Object *overlay_vec; | |
3092 | int noverlays; | |
3093 | struct window *w; | |
3094 | { | |
3095 | int i, j; | |
3096 | struct sortvec *sortvec; | |
3097 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
3098 | ||
3099 | /* Put the valid and relevant overlays into sortvec. */ | |
3100 | ||
3101 | for (i = 0, j = 0; i < noverlays; i++) | |
3102 | { | |
0fa767e7 | 3103 | Lisp_Object tem; |
c99fc30f | 3104 | Lisp_Object overlay; |
5985d248 | 3105 | |
c99fc30f | 3106 | overlay = overlay_vec[i]; |
5985d248 KH |
3107 | if (OVERLAY_VALID (overlay) |
3108 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
3109 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3110 | { | |
0fa767e7 KH |
3111 | /* If we're interested in a specific window, then ignore |
3112 | overlays that are limited to some other window. */ | |
3113 | if (w) | |
5985d248 | 3114 | { |
0fa767e7 KH |
3115 | Lisp_Object window; |
3116 | ||
3117 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 3118 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3119 | continue; |
5985d248 | 3120 | } |
0fa767e7 KH |
3121 | |
3122 | /* This overlay is good and counts: put it into sortvec. */ | |
3123 | sortvec[j].overlay = overlay; | |
3124 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3125 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3126 | tem = Foverlay_get (overlay, Qpriority); | |
3127 | if (INTEGERP (tem)) | |
3128 | sortvec[j].priority = XINT (tem); | |
3129 | else | |
3130 | sortvec[j].priority = 0; | |
3131 | j++; | |
5985d248 KH |
3132 | } |
3133 | } | |
3134 | noverlays = j; | |
3135 | ||
3136 | /* Sort the overlays into the proper order: increasing priority. */ | |
3137 | ||
3138 | if (noverlays > 1) | |
3139 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3140 | ||
3141 | for (i = 0; i < noverlays; i++) | |
3142 | overlay_vec[i] = sortvec[i].overlay; | |
3143 | return (noverlays); | |
3144 | } | |
3145 | \f | |
bbbe9545 KH |
3146 | struct sortstr |
3147 | { | |
cb26008f | 3148 | Lisp_Object string, string2; |
bbbe9545 KH |
3149 | int size; |
3150 | int priority; | |
3151 | }; | |
3152 | ||
e8185fa8 KH |
3153 | struct sortstrlist |
3154 | { | |
3155 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3156 | int size; /* Allocated length of that array. */ | |
3157 | int used; /* How much of the array is currently in use. */ | |
3158 | int bytes; /* Total length of the strings in buf. */ | |
3159 | }; | |
3160 | ||
3161 | /* Buffers for storing information about the overlays touching a given | |
3162 | position. These could be automatic variables in overlay_strings, but | |
3163 | it's more efficient to hold onto the memory instead of repeatedly | |
3164 | allocating and freeing it. */ | |
3165 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3166 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3167 | |
3168 | /* Allocated length of overlay_str_buf. */ | |
3169 | static int overlay_str_len; | |
3170 | ||
bbbe9545 KH |
3171 | /* A comparison function suitable for passing to qsort. */ |
3172 | static int | |
3173 | cmp_for_strings (as1, as2) | |
3174 | char *as1, *as2; | |
3175 | { | |
3176 | struct sortstr *s1 = (struct sortstr *)as1; | |
3177 | struct sortstr *s2 = (struct sortstr *)as2; | |
3178 | if (s1->size != s2->size) | |
3179 | return s2->size - s1->size; | |
3180 | if (s1->priority != s2->priority) | |
3181 | return s1->priority - s2->priority; | |
3182 | return 0; | |
3183 | } | |
3184 | ||
e8185fa8 | 3185 | static void |
cb26008f | 3186 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 3187 | struct sortstrlist *ssl; |
cb26008f | 3188 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
3189 | int size; |
3190 | { | |
43d27a72 RS |
3191 | int nbytes; |
3192 | ||
e8185fa8 KH |
3193 | if (ssl->used == ssl->size) |
3194 | { | |
3195 | if (ssl->buf) | |
3196 | ssl->size *= 2; | |
3197 | else | |
3198 | ssl->size = 5; | |
3199 | ssl->buf = ((struct sortstr *) | |
3200 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3201 | } | |
3202 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3203 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3204 | ssl->buf[ssl->used].size = size; |
3205 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3206 | ssl->used++; | |
43d27a72 RS |
3207 | |
3208 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3209 | nbytes = SCHARS (str); |
43d27a72 | 3210 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3211 | nbytes = count_size_as_multibyte (SDATA (str), |
3212 | SBYTES (str)); | |
43d27a72 | 3213 | else |
d5db4077 | 3214 | nbytes = SBYTES (str); |
43d27a72 RS |
3215 | |
3216 | ssl->bytes += nbytes; | |
3217 | ||
cb26008f | 3218 | if (STRINGP (str2)) |
43d27a72 RS |
3219 | { |
3220 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3221 | nbytes = SCHARS (str2); |
43d27a72 | 3222 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3223 | nbytes = count_size_as_multibyte (SDATA (str2), |
3224 | SBYTES (str2)); | |
43d27a72 | 3225 | else |
d5db4077 | 3226 | nbytes = SBYTES (str2); |
43d27a72 RS |
3227 | |
3228 | ssl->bytes += nbytes; | |
3229 | } | |
e8185fa8 | 3230 | } |
bbbe9545 KH |
3231 | |
3232 | /* Return the concatenation of the strings associated with overlays that | |
3233 | begin or end at POS, ignoring overlays that are specific to a window | |
3234 | other than W. The strings are concatenated in the appropriate order: | |
3235 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3236 | lower. Normally all of the after-strings come first, but zero-sized |
3237 | overlays have their after-strings ride along with the before-strings | |
3238 | because it would look strange to print them inside-out. | |
3239 | ||
3240 | Returns the string length, and stores the contents indirectly through | |
3241 | PSTR, if that variable is non-null. The string may be overwritten by | |
3242 | subsequent calls. */ | |
6b5d3b89 | 3243 | |
bbbe9545 KH |
3244 | int |
3245 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3246 | EMACS_INT pos; |
bbbe9545 | 3247 | struct window *w; |
6b5d3b89 | 3248 | unsigned char **pstr; |
bbbe9545 | 3249 | { |
2410d73a SM |
3250 | Lisp_Object overlay, window, str; |
3251 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3252 | int startpos, endpos; |
43d27a72 | 3253 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3254 | |
e8185fa8 KH |
3255 | overlay_heads.used = overlay_heads.bytes = 0; |
3256 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3257 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3258 | { |
2410d73a | 3259 | XSETMISC (overlay, ov); |
c2d5b10f | 3260 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3261 | |
3262 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3263 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3264 | if (endpos < pos) | |
3265 | break; | |
3266 | if (endpos != pos && startpos != pos) | |
3267 | continue; | |
3268 | window = Foverlay_get (overlay, Qwindow); | |
3269 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3270 | continue; | |
e8185fa8 KH |
3271 | if (startpos == pos |
3272 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3273 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3274 | (startpos == endpos |
3275 | ? Foverlay_get (overlay, Qafter_string) | |
3276 | : Qnil), | |
3277 | Foverlay_get (overlay, Qpriority), | |
3278 | endpos - startpos); | |
3279 | else if (endpos == pos | |
3280 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3281 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3282 | Foverlay_get (overlay, Qpriority), |
3283 | endpos - startpos); | |
bbbe9545 | 3284 | } |
2410d73a | 3285 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3286 | { |
2410d73a SM |
3287 | XSETMISC (overlay, ov); |
3288 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3289 | |
3290 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3291 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3292 | if (startpos > pos) | |
3293 | break; | |
e8185fa8 KH |
3294 | if (endpos != pos && startpos != pos) |
3295 | continue; | |
3296 | window = Foverlay_get (overlay, Qwindow); | |
3297 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3298 | continue; | |
e8185fa8 KH |
3299 | if (startpos == pos |
3300 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3301 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3302 | (startpos == endpos |
3303 | ? Foverlay_get (overlay, Qafter_string) | |
3304 | : Qnil), | |
3305 | Foverlay_get (overlay, Qpriority), | |
3306 | endpos - startpos); | |
3307 | else if (endpos == pos | |
3308 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3309 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3310 | Foverlay_get (overlay, Qpriority), |
3311 | endpos - startpos); | |
bbbe9545 | 3312 | } |
e8185fa8 KH |
3313 | if (overlay_tails.used > 1) |
3314 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3315 | cmp_for_strings); | |
3316 | if (overlay_heads.used > 1) | |
3317 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3318 | cmp_for_strings); | |
3319 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3320 | { |
e8185fa8 | 3321 | Lisp_Object tem; |
bbbe9545 | 3322 | int i; |
9f4d7cde | 3323 | unsigned char *p; |
e8185fa8 | 3324 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3325 | |
3326 | if (total > overlay_str_len) | |
9f4d7cde RS |
3327 | { |
3328 | overlay_str_len = total; | |
3329 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3330 | total); | |
3331 | } | |
bbbe9545 | 3332 | p = overlay_str_buf; |
e8185fa8 | 3333 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3334 | { |
43d27a72 | 3335 | int nbytes; |
e8185fa8 | 3336 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3337 | nbytes = copy_text (SDATA (tem), p, |
3338 | SBYTES (tem), | |
43d27a72 RS |
3339 | STRING_MULTIBYTE (tem), multibyte); |
3340 | p += nbytes; | |
bbbe9545 | 3341 | } |
e8185fa8 | 3342 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3343 | { |
43d27a72 | 3344 | int nbytes; |
e8185fa8 | 3345 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3346 | nbytes = copy_text (SDATA (tem), p, |
3347 | SBYTES (tem), | |
43d27a72 RS |
3348 | STRING_MULTIBYTE (tem), multibyte); |
3349 | p += nbytes; | |
cb26008f KH |
3350 | tem = overlay_heads.buf[i].string2; |
3351 | if (STRINGP (tem)) | |
3352 | { | |
d5db4077 KR |
3353 | nbytes = copy_text (SDATA (tem), p, |
3354 | SBYTES (tem), | |
43d27a72 RS |
3355 | STRING_MULTIBYTE (tem), multibyte); |
3356 | p += nbytes; | |
cb26008f | 3357 | } |
bbbe9545 | 3358 | } |
cb26008f KH |
3359 | if (p != overlay_str_buf + total) |
3360 | abort (); | |
bbbe9545 KH |
3361 | if (pstr) |
3362 | *pstr = overlay_str_buf; | |
e8185fa8 | 3363 | return total; |
bbbe9545 | 3364 | } |
e8185fa8 | 3365 | return 0; |
bbbe9545 KH |
3366 | } |
3367 | \f | |
5c4f68f1 | 3368 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3369 | |
2eec3b4e | 3370 | void |
5c4f68f1 JB |
3371 | recenter_overlay_lists (buf, pos) |
3372 | struct buffer *buf; | |
c2d5b10f | 3373 | EMACS_INT pos; |
2eec3b4e | 3374 | { |
2410d73a SM |
3375 | Lisp_Object overlay, beg, end; |
3376 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3377 | |
3378 | /* See if anything in overlays_before should move to overlays_after. */ | |
3379 | ||
3380 | /* We don't strictly need prev in this loop; it should always be nil. | |
3381 | But we use it for symmetry and in case that should cease to be true | |
3382 | with some future change. */ | |
2410d73a SM |
3383 | prev = NULL; |
3384 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3385 | { |
2410d73a SM |
3386 | next = tail->next; |
3387 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3388 | |
3389 | /* If the overlay is not valid, get rid of it. */ | |
3390 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3391 | #if 1 |
3392 | abort (); | |
3393 | #else | |
2eec3b4e RS |
3394 | { |
3395 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3396 | if (!NILP (prev)) | |
7539e11f | 3397 | XCDR (prev) = next; |
2eec3b4e | 3398 | else |
5c4f68f1 | 3399 | buf->overlays_before = next; |
2eec3b4e RS |
3400 | tail = prev; |
3401 | continue; | |
3402 | } | |
52f8ec73 | 3403 | #endif |
1ab256cb | 3404 | |
2eec3b4e RS |
3405 | beg = OVERLAY_START (overlay); |
3406 | end = OVERLAY_END (overlay); | |
1ab256cb | 3407 | |
2eec3b4e | 3408 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3409 | { |
2eec3b4e RS |
3410 | /* OVERLAY needs to be moved. */ |
3411 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3412 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3413 | |
3414 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3415 | if (prev) |
3416 | prev->next = next; | |
2eec3b4e | 3417 | else |
5c4f68f1 | 3418 | buf->overlays_before = next; |
2eec3b4e RS |
3419 | |
3420 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3421 | other_prev = NULL; |
3422 | for (other = buf->overlays_after; other; | |
3423 | other_prev = other, other = other->next) | |
1ab256cb | 3424 | { |
6af718a4 | 3425 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3426 | |
2410d73a SM |
3427 | XSETMISC (otheroverlay, other); |
3428 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3429 | |
3430 | otherbeg = OVERLAY_START (otheroverlay); | |
3431 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3432 | break; | |
1ab256cb | 3433 | } |
2eec3b4e RS |
3434 | |
3435 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3436 | tail->next = other; |
3437 | if (other_prev) | |
3438 | other_prev->next = tail; | |
1ab256cb | 3439 | else |
5c4f68f1 | 3440 | buf->overlays_after = tail; |
2eec3b4e | 3441 | tail = prev; |
1ab256cb | 3442 | } |
2eec3b4e RS |
3443 | else |
3444 | /* We've reached the things that should stay in overlays_before. | |
3445 | All the rest of overlays_before must end even earlier, | |
3446 | so stop now. */ | |
3447 | break; | |
3448 | } | |
3449 | ||
3450 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3451 | prev = NULL; |
3452 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3453 | { |
2410d73a SM |
3454 | next = tail->next; |
3455 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3456 | |
3457 | /* If the overlay is not valid, get rid of it. */ | |
3458 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3459 | #if 1 |
3460 | abort (); | |
3461 | #else | |
2eec3b4e RS |
3462 | { |
3463 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3464 | if (!NILP (prev)) | |
7539e11f | 3465 | XCDR (prev) = next; |
2eec3b4e | 3466 | else |
5c4f68f1 | 3467 | buf->overlays_after = next; |
2eec3b4e RS |
3468 | tail = prev; |
3469 | continue; | |
3470 | } | |
52f8ec73 | 3471 | #endif |
2eec3b4e RS |
3472 | |
3473 | beg = OVERLAY_START (overlay); | |
3474 | end = OVERLAY_END (overlay); | |
3475 | ||
3476 | /* Stop looking, when we know that nothing further | |
3477 | can possibly end before POS. */ | |
3478 | if (OVERLAY_POSITION (beg) > pos) | |
3479 | break; | |
3480 | ||
3481 | if (OVERLAY_POSITION (end) <= pos) | |
3482 | { | |
3483 | /* OVERLAY needs to be moved. */ | |
3484 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3485 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3486 | |
3487 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3488 | if (prev) |
3489 | prev->next = next; | |
2eec3b4e | 3490 | else |
5c4f68f1 | 3491 | buf->overlays_after = next; |
2eec3b4e RS |
3492 | |
3493 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3494 | other_prev = NULL; |
3495 | for (other = buf->overlays_before; other; | |
3496 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3497 | { |
3498 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3499 | |
2410d73a SM |
3500 | XSETMISC (otheroverlay, other); |
3501 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3502 | |
3503 | otherend = OVERLAY_END (otheroverlay); | |
3504 | if (OVERLAY_POSITION (otherend) <= where) | |
3505 | break; | |
3506 | } | |
3507 | ||
3508 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3509 | tail->next = other; |
3510 | if (other_prev) | |
3511 | other_prev->next = tail; | |
2eec3b4e | 3512 | else |
5c4f68f1 | 3513 | buf->overlays_before = tail; |
2eec3b4e RS |
3514 | tail = prev; |
3515 | } | |
3516 | } | |
3517 | ||
c2d5b10f | 3518 | buf->overlay_center = pos; |
2eec3b4e | 3519 | } |
2b1bdf65 | 3520 | |
423cdb46 KH |
3521 | void |
3522 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3523 | EMACS_INT pos; |
3524 | EMACS_INT length; | |
423cdb46 KH |
3525 | { |
3526 | /* After an insertion, the lists are still sorted properly, | |
3527 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3528 | if (current_buffer->overlay_center >= pos) |
3529 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3530 | } |
3531 | ||
3532 | void | |
3533 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3534 | EMACS_INT pos; |
3535 | EMACS_INT length; | |
423cdb46 | 3536 | { |
c2d5b10f | 3537 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3538 | /* The deletion was to our right. No change needed; the before- and |
3539 | after-lists are still consistent. */ | |
3540 | ; | |
c2d5b10f | 3541 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3542 | /* The deletion was to our left. We need to adjust the center value |
3543 | to account for the change in position, but the lists are consistent | |
3544 | given the new value. */ | |
c2d5b10f | 3545 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3546 | else |
3547 | /* We're right in the middle. There might be things on the after-list | |
3548 | that now belong on the before-list. Recentering will move them, | |
3549 | and also update the center point. */ | |
3550 | recenter_overlay_lists (current_buffer, pos); | |
3551 | } | |
3552 | ||
2b1bdf65 KH |
3553 | /* Fix up overlays that were garbled as a result of permuting markers |
3554 | in the range START through END. Any overlay with at least one | |
3555 | endpoint in this range will need to be unlinked from the overlay | |
3556 | list and reinserted in its proper place. | |
3557 | Such an overlay might even have negative size at this point. | |
6b61353c | 3558 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3559 | void |
6b61353c | 3560 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3561 | register int start, end; |
3562 | { | |
6af718a4 | 3563 | Lisp_Object overlay; |
2410d73a | 3564 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3565 | /* These are either nil, indicating that before_list or after_list |
3566 | should be assigned, or the cons cell the cdr of which should be | |
3567 | assigned. */ | |
2410d73a | 3568 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3569 | /* 'Parent', likewise, indicates a cons cell or |
3570 | current_buffer->overlays_before or overlays_after, depending | |
3571 | which loop we're in. */ | |
2410d73a | 3572 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3573 | int startpos, endpos; |
3574 | ||
3575 | /* This algorithm shifts links around instead of consing and GCing. | |
3576 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3577 | well-formed list except that its last element, the CDR of beforep |
3578 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3579 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3580 | that before_list isn't initialized, although it may look | |
3581 | strange. */ | |
2410d73a | 3582 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3583 | { |
2410d73a | 3584 | XSETMISC (overlay, tail); |
6b61353c | 3585 | |
2b1bdf65 | 3586 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3587 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3588 | ||
3589 | /* If the overlay is backwards, make it empty. */ | |
3590 | if (endpos < startpos) | |
3591 | { | |
3592 | startpos = endpos; | |
3593 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3594 | Qnil); | |
3595 | } | |
3596 | ||
2b1bdf65 KH |
3597 | if (endpos < start) |
3598 | break; | |
60ebfdf3 | 3599 | |
2b1bdf65 KH |
3600 | if (endpos < end |
3601 | || (startpos >= start && startpos < end)) | |
3602 | { | |
2b1bdf65 KH |
3603 | /* Add it to the end of the wrong list. Later on, |
3604 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3605 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3606 | { |
2410d73a | 3607 | if (!afterp) |
1138e742 KR |
3608 | after_list = tail; |
3609 | else | |
2410d73a | 3610 | afterp->next = tail; |
1138e742 | 3611 | afterp = tail; |
2b1bdf65 KH |
3612 | } |
3613 | else | |
3614 | { | |
2410d73a | 3615 | if (!beforep) |
1138e742 KR |
3616 | before_list = tail; |
3617 | else | |
2410d73a | 3618 | beforep->next = tail; |
1138e742 | 3619 | beforep = tail; |
2b1bdf65 | 3620 | } |
2410d73a SM |
3621 | if (!parent) |
3622 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3623 | else |
2410d73a SM |
3624 | parent->next = tail->next; |
3625 | tail = tail->next; | |
2b1bdf65 KH |
3626 | } |
3627 | else | |
2410d73a | 3628 | parent = tail, tail = parent->next; |
2b1bdf65 | 3629 | } |
2410d73a | 3630 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3631 | { |
2410d73a | 3632 | XSETMISC (overlay, tail); |
6b61353c | 3633 | |
2b1bdf65 | 3634 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3635 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3636 | ||
3637 | /* If the overlay is backwards, make it empty. */ | |
3638 | if (endpos < startpos) | |
3639 | { | |
3640 | startpos = endpos; | |
3641 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3642 | Qnil); |
6b61353c KH |
3643 | } |
3644 | ||
2b1bdf65 KH |
3645 | if (startpos >= end) |
3646 | break; | |
6b61353c | 3647 | |
2b1bdf65 KH |
3648 | if (startpos >= start |
3649 | || (endpos >= start && endpos < end)) | |
3650 | { | |
c2d5b10f | 3651 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3652 | { |
2410d73a | 3653 | if (!afterp) |
1138e742 KR |
3654 | after_list = tail; |
3655 | else | |
2410d73a | 3656 | afterp->next = tail; |
1138e742 | 3657 | afterp = tail; |
2b1bdf65 KH |
3658 | } |
3659 | else | |
3660 | { | |
2410d73a | 3661 | if (!beforep) |
1138e742 KR |
3662 | before_list = tail; |
3663 | else | |
2410d73a | 3664 | beforep->next = tail; |
1138e742 | 3665 | beforep = tail; |
2b1bdf65 | 3666 | } |
2410d73a SM |
3667 | if (!parent) |
3668 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3669 | else |
2410d73a SM |
3670 | parent->next = tail->next; |
3671 | tail = tail->next; | |
2b1bdf65 KH |
3672 | } |
3673 | else | |
2410d73a | 3674 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3675 | } |
3676 | ||
3677 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3678 | and let the recenter function make it sane again. */ | |
2410d73a | 3679 | if (beforep) |
1138e742 | 3680 | { |
2410d73a | 3681 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3682 | current_buffer->overlays_before = before_list; |
3683 | } | |
c2d5b10f | 3684 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3685 | |
2410d73a | 3686 | if (afterp) |
1138e742 | 3687 | { |
2410d73a | 3688 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3689 | current_buffer->overlays_after = after_list; |
3690 | } | |
c2d5b10f | 3691 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3692 | } |
3b06f880 KH |
3693 | |
3694 | /* We have two types of overlay: the one whose ending marker is | |
3695 | after-insertion-marker (this is the usual case) and the one whose | |
3696 | ending marker is before-insertion-marker. When `overlays_before' | |
3697 | contains overlays of the latter type and the former type in this | |
3698 | order and both overlays end at inserting position, inserting a text | |
3699 | increases only the ending marker of the latter type, which results | |
3700 | in incorrect ordering of `overlays_before'. | |
3701 | ||
3702 | This function fixes ordering of overlays in the slot | |
3703 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3704 | was at PREV, and now is at POS. */ | |
3705 | ||
01136e9b | 3706 | void |
3b06f880 KH |
3707 | fix_overlays_before (bp, prev, pos) |
3708 | struct buffer *bp; | |
c2d5b10f | 3709 | EMACS_INT prev, pos; |
3b06f880 | 3710 | { |
2410d73a SM |
3711 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3712 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3713 | Lisp_Object tem; | |
c2d5b10f | 3714 | EMACS_INT end; |
3b06f880 KH |
3715 | |
3716 | /* After the insertion, the several overlays may be in incorrect | |
3717 | order. The possibility is that, in the list `overlays_before', | |
3718 | an overlay which ends at POS appears after an overlay which ends | |
3719 | at PREV. Since POS is greater than PREV, we must fix the | |
3720 | ordering of these overlays, by moving overlays ends at POS before | |
3721 | the overlays ends at PREV. */ | |
3722 | ||
3723 | /* At first, find a place where disordered overlays should be linked | |
3724 | in. It is where an overlay which end before POS exists. (i.e. an | |
3725 | overlay whose ending marker is after-insertion-marker if disorder | |
3726 | exists). */ | |
2410d73a SM |
3727 | while (tail |
3728 | && (XSETMISC (tem, tail), | |
3729 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3730 | { |
3731 | parent = tail; | |
2410d73a | 3732 | tail = tail->next; |
1138e742 | 3733 | } |
3b06f880 KH |
3734 | |
3735 | /* If we don't find such an overlay, | |
3736 | or the found one ends before PREV, | |
3737 | or the found one is the last one in the list, | |
3738 | we don't have to fix anything. */ | |
f93ad4cf | 3739 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3740 | return; |
3741 | ||
1138e742 KR |
3742 | right_pair = parent; |
3743 | parent = tail; | |
2410d73a | 3744 | tail = tail->next; |
3b06f880 | 3745 | |
1138e742 | 3746 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3747 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3748 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3749 | we found an overlay which ends before PREV, the remaining | |
3750 | overlays are in correct order. */ | |
2410d73a | 3751 | while (tail) |
3b06f880 | 3752 | { |
2410d73a SM |
3753 | XSETMISC (tem, tail); |
3754 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3755 | |
3756 | if (end == pos) | |
3757 | { /* This overlay is disordered. */ | |
2410d73a | 3758 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3759 | |
3760 | /* Unlink the found overlay. */ | |
2410d73a SM |
3761 | tail = found->next; |
3762 | parent->next = tail; | |
1138e742 KR |
3763 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3764 | and link it into the right place. */ | |
2410d73a | 3765 | if (!right_pair) |
1138e742 | 3766 | { |
2410d73a | 3767 | found->next = bp->overlays_before; |
1138e742 KR |
3768 | bp->overlays_before = found; |
3769 | } | |
3770 | else | |
3771 | { | |
2410d73a SM |
3772 | found->next = right_pair->next; |
3773 | right_pair->next = found; | |
1138e742 | 3774 | } |
3b06f880 KH |
3775 | } |
3776 | else if (end == prev) | |
1138e742 KR |
3777 | { |
3778 | parent = tail; | |
2410d73a | 3779 | tail = tail->next; |
1138e742 | 3780 | } |
3b06f880 KH |
3781 | else /* No more disordered overlay. */ |
3782 | break; | |
3783 | } | |
3784 | } | |
2eec3b4e | 3785 | \f |
52f8ec73 | 3786 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3787 | doc: /* Return t if OBJECT is an overlay. */) |
3788 | (object) | |
52f8ec73 JB |
3789 | Lisp_Object object; |
3790 | { | |
3791 | return (OVERLAYP (object) ? Qt : Qnil); | |
3792 | } | |
3793 | ||
acac2700 | 3794 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3795 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3796 | If omitted, BUFFER defaults to the current buffer. |
3797 | BEG and END may be integers or markers. | |
a625ee20 RS |
3798 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3799 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3800 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3801 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3802 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3803 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3804 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3805 | Lisp_Object beg, end, buffer; |
acac2700 | 3806 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3807 | { |
3808 | Lisp_Object overlay; | |
5c4f68f1 | 3809 | struct buffer *b; |
2eec3b4e | 3810 | |
5c4f68f1 | 3811 | if (NILP (buffer)) |
67180c6a | 3812 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3813 | else |
b7826503 | 3814 | CHECK_BUFFER (buffer); |
883047b9 JB |
3815 | if (MARKERP (beg) |
3816 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3817 | error ("Marker points into wrong buffer"); | |
3818 | if (MARKERP (end) | |
3819 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3820 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3821 | |
b7826503 PJ |
3822 | CHECK_NUMBER_COERCE_MARKER (beg); |
3823 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3824 | |
883047b9 | 3825 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3826 | { |
c99fc30f KH |
3827 | Lisp_Object temp; |
3828 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3829 | } |
883047b9 JB |
3830 | |
3831 | b = XBUFFER (buffer); | |
3832 | ||
3833 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3834 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3835 | |
acac2700 RS |
3836 | if (!NILP (front_advance)) |
3837 | XMARKER (beg)->insertion_type = 1; | |
3838 | if (!NILP (rear_advance)) | |
3839 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3840 | |
48e2e3ba | 3841 | overlay = allocate_misc (); |
89ca3e1b | 3842 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3843 | XOVERLAY (overlay)->start = beg; |
3844 | XOVERLAY (overlay)->end = end; | |
3845 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3846 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3847 | |
177c0ea7 | 3848 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3849 | end = OVERLAY_END (overlay); |
c2d5b10f | 3850 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3851 | { |
3852 | if (b->overlays_after) | |
3853 | XOVERLAY (overlay)->next = b->overlays_after; | |
3854 | b->overlays_after = XOVERLAY (overlay); | |
3855 | } | |
2eec3b4e | 3856 | else |
2410d73a SM |
3857 | { |
3858 | if (b->overlays_before) | |
3859 | XOVERLAY (overlay)->next = b->overlays_before; | |
3860 | b->overlays_before = XOVERLAY (overlay); | |
3861 | } | |
2eec3b4e RS |
3862 | |
3863 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3864 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3865 | |
b61982dd JB |
3866 | /* We don't need to redisplay the region covered by the overlay, because |
3867 | the overlay has no properties at the moment. */ | |
3868 | ||
2eec3b4e RS |
3869 | return overlay; |
3870 | } | |
876aa27c RS |
3871 | \f |
3872 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3873 | ||
3874 | static void | |
3875 | modify_overlay (buf, start, end) | |
3876 | struct buffer *buf; | |
c2d5b10f | 3877 | EMACS_INT start, end; |
876aa27c | 3878 | { |
876aa27c RS |
3879 | if (start > end) |
3880 | { | |
3881 | int temp = start; | |
26f545d7 GM |
3882 | start = end; |
3883 | end = temp; | |
876aa27c RS |
3884 | } |
3885 | ||
481b5054 | 3886 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3887 | |
876aa27c RS |
3888 | /* If this is a buffer not in the selected window, |
3889 | we must do other windows. */ | |
3890 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3891 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3892 | /* If multiple windows show this buffer, we must do other windows. */ |
3893 | else if (buffer_shared > 1) | |
3894 | windows_or_buffers_changed = 1; | |
18700091 KS |
3895 | /* If we modify an overlay at the end of the buffer, we cannot |
3896 | be sure that window end is still valid. */ | |
3897 | else if (end >= ZV && start <= ZV) | |
3898 | windows_or_buffers_changed = 1; | |
876aa27c | 3899 | |
d8b9150f | 3900 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3901 | } |
2eec3b4e | 3902 | |
018ba359 | 3903 | \f |
2e34157c RS |
3904 | Lisp_Object Fdelete_overlay (); |
3905 | ||
2410d73a SM |
3906 | static struct Lisp_Overlay * |
3907 | unchain_overlay (list, overlay) | |
3908 | struct Lisp_Overlay *list, *overlay; | |
3909 | { | |
3910 | struct Lisp_Overlay *tmp, *prev; | |
3911 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3912 | if (tmp == overlay) | |
3913 | { | |
3914 | if (prev) | |
3915 | prev->next = tmp->next; | |
3916 | else | |
3917 | list = tmp->next; | |
3918 | overlay->next = NULL; | |
3919 | break; | |
3920 | } | |
3921 | return list; | |
3922 | } | |
3923 | ||
5c4f68f1 | 3924 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3925 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3926 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3927 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3928 | buffer. */) |
3929 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3930 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3931 | { |
0a4469c9 RS |
3932 | struct buffer *b, *ob; |
3933 | Lisp_Object obuffer; | |
aed13378 | 3934 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3935 | |
b7826503 | 3936 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3937 | if (NILP (buffer)) |
3938 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3939 | if (NILP (buffer)) |
67180c6a | 3940 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3941 | CHECK_BUFFER (buffer); |
883047b9 JB |
3942 | |
3943 | if (MARKERP (beg) | |
3944 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3945 | error ("Marker points into wrong buffer"); | |
3946 | if (MARKERP (end) | |
3947 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3948 | error ("Marker points into wrong buffer"); | |
3949 | ||
b7826503 PJ |
3950 | CHECK_NUMBER_COERCE_MARKER (beg); |
3951 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3952 | |
9d7608b7 KH |
3953 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3954 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3955 | |
b61982dd JB |
3956 | if (XINT (beg) > XINT (end)) |
3957 | { | |
c99fc30f KH |
3958 | Lisp_Object temp; |
3959 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3960 | } |
3961 | ||
9d7608b7 KH |
3962 | specbind (Qinhibit_quit, Qt); |
3963 | ||
0a4469c9 | 3964 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3965 | b = XBUFFER (buffer); |
8801a864 | 3966 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3967 | |
c82ed728 | 3968 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3969 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3970 | { |
3971 | /* Redisplay where the overlay was. */ | |
3972 | if (!NILP (obuffer)) | |
3973 | { | |
2e34157c RS |
3974 | int o_beg; |
3975 | int o_end; | |
50760c4a | 3976 | |
80509f2f RS |
3977 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3978 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3979 | |
2e34157c | 3980 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3981 | } |
3982 | ||
3983 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3984 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3985 | } |
c82ed728 JB |
3986 | else |
3987 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3988 | { | |
2e34157c | 3989 | int o_beg, o_end; |
c82ed728 | 3990 | |
80509f2f RS |
3991 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3992 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3993 | |
2e34157c RS |
3994 | if (o_beg == XINT (beg)) |
3995 | modify_overlay (b, o_end, XINT (end)); | |
3996 | else if (o_end == XINT (end)) | |
3997 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3998 | else |
3999 | { | |
2e34157c RS |
4000 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
4001 | if (XINT (end) > o_end) o_end = XINT (end); | |
4002 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
4003 | } |
4004 | } | |
b61982dd | 4005 | |
0a4469c9 RS |
4006 | if (!NILP (obuffer)) |
4007 | { | |
2410d73a SM |
4008 | ob->overlays_before |
4009 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
4010 | ob->overlays_after | |
4011 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
4012 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 4013 | } |
5c4f68f1 JB |
4014 | |
4015 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
4016 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 4017 | |
177c0ea7 | 4018 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 4019 | end = OVERLAY_END (overlay); |
c2d5b10f | 4020 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 4021 | { |
8f924df7 KH |
4022 | XOVERLAY (overlay)->next = b->overlays_after; |
4023 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 4024 | } |
2eec3b4e | 4025 | else |
2410d73a | 4026 | { |
8f924df7 KH |
4027 | XOVERLAY (overlay)->next = b->overlays_before; |
4028 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 4029 | } |
2eec3b4e RS |
4030 | |
4031 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4032 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4033 | |
0a4469c9 | 4034 | return unbind_to (count, overlay); |
2eec3b4e RS |
4035 | } |
4036 | ||
4037 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
4038 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
4039 | (overlay) | |
5c4f68f1 | 4040 | Lisp_Object overlay; |
2eec3b4e | 4041 | { |
0a4469c9 | 4042 | Lisp_Object buffer; |
5c4f68f1 | 4043 | struct buffer *b; |
aed13378 | 4044 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 4045 | |
b7826503 | 4046 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4047 | |
0a4469c9 RS |
4048 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4049 | if (NILP (buffer)) | |
4050 | return Qnil; | |
4051 | ||
4052 | b = XBUFFER (buffer); | |
0a4469c9 | 4053 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4054 | |
2410d73a SM |
4055 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
4056 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
4057 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 4058 | modify_overlay (b, |
8231a9aa RS |
4059 | marker_position (OVERLAY_START (overlay)), |
4060 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
4061 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
4062 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
4063 | ||
e58c389d | 4064 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4065 | display optimizations for the affected buffer, on the basis that |
4066 | these strings may contain newlines. This is easier to do than to | |
4067 | check for that situation during redisplay. */ | |
4068 | if (!windows_or_buffers_changed | |
4069 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4070 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4071 | b->prevent_redisplay_optimizations_p = 1; | |
4072 | ||
0a4469c9 | 4073 | return unbind_to (count, Qnil); |
2eec3b4e RS |
4074 | } |
4075 | \f | |
8ebafa8d JB |
4076 | /* Overlay dissection functions. */ |
4077 | ||
4078 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
4079 | doc: /* Return the position at which OVERLAY starts. */) |
4080 | (overlay) | |
8ebafa8d JB |
4081 | Lisp_Object overlay; |
4082 | { | |
b7826503 | 4083 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4084 | |
4085 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4086 | } | |
4087 | ||
4088 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
4089 | doc: /* Return the position at which OVERLAY ends. */) |
4090 | (overlay) | |
8ebafa8d JB |
4091 | Lisp_Object overlay; |
4092 | { | |
b7826503 | 4093 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4094 | |
4095 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4096 | } | |
4097 | ||
4098 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4099 | doc: /* Return the buffer OVERLAY belongs to. |
4100 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 4101 | (overlay) |
8ebafa8d JB |
4102 | Lisp_Object overlay; |
4103 | { | |
b7826503 | 4104 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4105 | |
4106 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4107 | } | |
4108 | ||
4109 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4110 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4111 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
4112 | OVERLAY. */) |
4113 | (overlay) | |
8ebafa8d JB |
4114 | Lisp_Object overlay; |
4115 | { | |
b7826503 | 4116 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4117 | |
48e2e3ba | 4118 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4119 | } |
4120 | ||
4121 | \f | |
2eec3b4e | 4122 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4123 | doc: /* Return a list of the overlays that contain the character at POS. */) |
7ee72033 | 4124 | (pos) |
2eec3b4e RS |
4125 | Lisp_Object pos; |
4126 | { | |
4127 | int noverlays; | |
2eec3b4e RS |
4128 | Lisp_Object *overlay_vec; |
4129 | int len; | |
4130 | Lisp_Object result; | |
4131 | ||
b7826503 | 4132 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4133 | |
4134 | len = 10; | |
a9800ae8 | 4135 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
4136 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
4137 | ||
4138 | /* Put all the overlays we want in a vector in overlay_vec. | |
4139 | Store the length in len. */ | |
2a77a7d7 | 4140 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4141 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
4142 | |
4143 | /* Make a list of them all. */ | |
4144 | result = Flist (noverlays, overlay_vec); | |
4145 | ||
9ac0d9e0 | 4146 | xfree (overlay_vec); |
2eec3b4e RS |
4147 | return result; |
4148 | } | |
4149 | ||
74514898 | 4150 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4151 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4152 | Overlap means that at least one character is contained within the overlay |
4153 | and also contained within the specified region. | |
7723e095 MR |
4154 | Empty overlays are included in the result if they are located at BEG, |
4155 | between BEG and END, or at END provided END denotes the position at the | |
4156 | end of the buffer. */) | |
7ee72033 | 4157 | (beg, end) |
74514898 RS |
4158 | Lisp_Object beg, end; |
4159 | { | |
4160 | int noverlays; | |
4161 | Lisp_Object *overlay_vec; | |
4162 | int len; | |
4163 | Lisp_Object result; | |
4164 | ||
b7826503 PJ |
4165 | CHECK_NUMBER_COERCE_MARKER (beg); |
4166 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4167 | |
4168 | len = 10; | |
4169 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4170 | ||
4171 | /* Put all the overlays we want in a vector in overlay_vec. | |
4172 | Store the length in len. */ | |
4173 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4174 | (int *) 0, (int *) 0); | |
4175 | ||
4176 | /* Make a list of them all. */ | |
4177 | result = Flist (noverlays, overlay_vec); | |
4178 | ||
4179 | xfree (overlay_vec); | |
4180 | return result; | |
4181 | } | |
4182 | ||
2eec3b4e | 4183 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4184 | 1, 1, 0, |
7ee72033 | 4185 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4186 | If there are no overlay boundaries from POS to (point-max), |
4187 | the value is (point-max). */) | |
7ee72033 | 4188 | (pos) |
2eec3b4e RS |
4189 | Lisp_Object pos; |
4190 | { | |
4191 | int noverlays; | |
0f8b27ea | 4192 | EMACS_INT endpos; |
2eec3b4e RS |
4193 | Lisp_Object *overlay_vec; |
4194 | int len; | |
2eec3b4e RS |
4195 | int i; |
4196 | ||
b7826503 | 4197 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4198 | |
4199 | len = 10; | |
4200 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4201 | ||
4202 | /* Put all the overlays we want in a vector in overlay_vec. | |
4203 | Store the length in len. | |
4204 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4205 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4206 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4207 | |
4208 | /* If any of these overlays ends before endpos, | |
4209 | use its ending point instead. */ | |
4210 | for (i = 0; i < noverlays; i++) | |
4211 | { | |
4212 | Lisp_Object oend; | |
0f8b27ea | 4213 | EMACS_INT oendpos; |
2eec3b4e RS |
4214 | |
4215 | oend = OVERLAY_END (overlay_vec[i]); | |
4216 | oendpos = OVERLAY_POSITION (oend); | |
4217 | if (oendpos < endpos) | |
4218 | endpos = oendpos; | |
1ab256cb RM |
4219 | } |
4220 | ||
9ac0d9e0 | 4221 | xfree (overlay_vec); |
2eec3b4e RS |
4222 | return make_number (endpos); |
4223 | } | |
239c932b RS |
4224 | |
4225 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4226 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4227 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4228 | If there are no overlay boundaries from (point-min) to POS, |
4229 | the value is (point-min). */) | |
7ee72033 | 4230 | (pos) |
239c932b RS |
4231 | Lisp_Object pos; |
4232 | { | |
4233 | int noverlays; | |
0f8b27ea | 4234 | EMACS_INT prevpos; |
239c932b RS |
4235 | Lisp_Object *overlay_vec; |
4236 | int len; | |
239c932b | 4237 | |
b7826503 | 4238 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4239 | |
624bbdc4 RS |
4240 | /* At beginning of buffer, we know the answer; |
4241 | avoid bug subtracting 1 below. */ | |
4242 | if (XINT (pos) == BEGV) | |
4243 | return pos; | |
4244 | ||
017f0539 GM |
4245 | len = 10; |
4246 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4247 | ||
239c932b RS |
4248 | /* Put all the overlays we want in a vector in overlay_vec. |
4249 | Store the length in len. | |
daa1c109 | 4250 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4251 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4252 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4253 | |
239c932b RS |
4254 | xfree (overlay_vec); |
4255 | return make_number (prevpos); | |
4256 | } | |
2eec3b4e RS |
4257 | \f |
4258 | /* These functions are for debugging overlays. */ | |
4259 | ||
4260 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4261 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4262 | The car has all the overlays before the overlay center; |
4263 | the cdr has all the overlays after the overlay center. | |
4264 | Recentering overlays moves overlays between these lists. | |
4265 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4266 | However, the overlays you get are the real objects that the buffer uses. */) |
4267 | () | |
2eec3b4e | 4268 | { |
2410d73a SM |
4269 | struct Lisp_Overlay *ol; |
4270 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4271 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4272 | { | |
4273 | XSETMISC (tmp, ol); | |
4274 | before = Fcons (tmp, before); | |
4275 | } | |
4276 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4277 | { | |
4278 | XSETMISC (tmp, ol); | |
4279 | after = Fcons (tmp, after); | |
4280 | } | |
4281 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4282 | } |
4283 | ||
4284 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4285 | doc: /* Recenter the overlays of the current buffer around position POS. |
4286 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4287 | for positions far away from POS). */) | |
7ee72033 | 4288 | (pos) |
2eec3b4e RS |
4289 | Lisp_Object pos; |
4290 | { | |
b7826503 | 4291 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4292 | |
5c4f68f1 | 4293 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4294 | return Qnil; |
4295 | } | |
4296 | \f | |
4297 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4298 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4299 | (overlay, prop) | |
2eec3b4e RS |
4300 | Lisp_Object overlay, prop; |
4301 | { | |
b7826503 | 4302 | CHECK_OVERLAY (overlay); |
9a593927 | 4303 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4304 | } |
4305 | ||
4306 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4307 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4308 | (overlay, prop, value) | |
2eec3b4e RS |
4309 | Lisp_Object overlay, prop, value; |
4310 | { | |
48e2e3ba | 4311 | Lisp_Object tail, buffer; |
9d7608b7 | 4312 | int changed; |
2eec3b4e | 4313 | |
b7826503 | 4314 | CHECK_OVERLAY (overlay); |
b61982dd | 4315 | |
274a9425 RS |
4316 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4317 | ||
48e2e3ba | 4318 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4319 | CONSP (tail) && CONSP (XCDR (tail)); |
4320 | tail = XCDR (XCDR (tail))) | |
4321 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4322 | { |
7539e11f | 4323 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4324 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4325 | goto found; |
274a9425 | 4326 | } |
9d7608b7 KH |
4327 | /* It wasn't in the list, so add it to the front. */ |
4328 | changed = !NILP (value); | |
48e2e3ba KH |
4329 | XOVERLAY (overlay)->plist |
4330 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4331 | found: |
4332 | if (! NILP (buffer)) | |
4333 | { | |
4334 | if (changed) | |
876aa27c | 4335 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4336 | marker_position (OVERLAY_START (overlay)), |
4337 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4338 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4339 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4340 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4341 | Fdelete_overlay (overlay); | |
4342 | } | |
7d63db98 | 4343 | |
2eec3b4e | 4344 | return value; |
1ab256cb RM |
4345 | } |
4346 | \f | |
9115729e KH |
4347 | /* Subroutine of report_overlay_modification. */ |
4348 | ||
4349 | /* Lisp vector holding overlay hook functions to call. | |
4350 | Vector elements come in pairs. | |
4351 | Each even-index element is a list of hook functions. | |
4352 | The following odd-index element is the overlay they came from. | |
4353 | ||
4354 | Before the buffer change, we fill in this vector | |
4355 | as we call overlay hook functions. | |
4356 | After the buffer change, we get the functions to call from this vector. | |
4357 | This way we always call the same functions before and after the change. */ | |
4358 | static Lisp_Object last_overlay_modification_hooks; | |
4359 | ||
4360 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4361 | static int last_overlay_modification_hooks_used; | |
4362 | ||
4363 | /* Add one functionlist/overlay pair | |
4364 | to the end of last_overlay_modification_hooks. */ | |
4365 | ||
4366 | static void | |
4367 | add_overlay_mod_hooklist (functionlist, overlay) | |
4368 | Lisp_Object functionlist, overlay; | |
4369 | { | |
4370 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4371 | ||
4372 | if (last_overlay_modification_hooks_used == oldsize) | |
de0280a2 EZ |
4373 | last_overlay_modification_hooks = larger_vector |
4374 | (last_overlay_modification_hooks, oldsize * 2, Qnil); | |
3ae565b3 SM |
4375 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4376 | functionlist); last_overlay_modification_hooks_used++; | |
4377 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4378 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4379 | } |
4380 | \f | |
173f2a64 RS |
4381 | /* Run the modification-hooks of overlays that include |
4382 | any part of the text in START to END. | |
9115729e KH |
4383 | If this change is an insertion, also |
4384 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4385 | and the insert-after-hooks of overlay ending at START. |
4386 | ||
4387 | This is called both before and after the modification. | |
4388 | AFTER is nonzero when we call after the modification. | |
4389 | ||
9115729e KH |
4390 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4391 | When AFTER is nonzero, they are the start position, | |
4392 | the position after the inserted new text, | |
4393 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4394 | |
4395 | void | |
930a9140 | 4396 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4397 | Lisp_Object start, end; |
930a9140 RS |
4398 | int after; |
4399 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4400 | { |
2410d73a SM |
4401 | Lisp_Object prop, overlay; |
4402 | struct Lisp_Overlay *tail; | |
9115729e KH |
4403 | /* 1 if this change is an insertion. */ |
4404 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4405 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4406 | |
4407 | overlay = Qnil; | |
2410d73a | 4408 | tail = NULL; |
9115729e | 4409 | |
27c6b98e SM |
4410 | /* We used to run the functions as soon as we found them and only register |
4411 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4412 | case. But running elisp code as we traverse the list of overlays is | |
4413 | painful because the list can be modified by the elisp code so we had to | |
4414 | copy at several places. We now simply do a read-only traversal that | |
4415 | only collects the functions to run and we run them afterwards. It's | |
4416 | simpler, especially since all the code was already there. -stef */ | |
4417 | ||
a615c6dc | 4418 | if (!after) |
173f2a64 | 4419 | { |
a615c6dc SM |
4420 | /* We are being called before a change. |
4421 | Scan the overlays to find the functions to call. */ | |
4422 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4423 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4424 | { |
a615c6dc SM |
4425 | int startpos, endpos; |
4426 | Lisp_Object ostart, oend; | |
4427 | ||
2410d73a | 4428 | XSETMISC (overlay, tail); |
a615c6dc SM |
4429 | |
4430 | ostart = OVERLAY_START (overlay); | |
4431 | oend = OVERLAY_END (overlay); | |
4432 | endpos = OVERLAY_POSITION (oend); | |
4433 | if (XFASTINT (start) > endpos) | |
4434 | break; | |
4435 | startpos = OVERLAY_POSITION (ostart); | |
4436 | if (insertion && (XFASTINT (start) == startpos | |
4437 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4438 | { |
a615c6dc SM |
4439 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4440 | if (!NILP (prop)) | |
4441 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4442 | } |
a615c6dc SM |
4443 | if (insertion && (XFASTINT (start) == endpos |
4444 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4445 | { |
a615c6dc SM |
4446 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4447 | if (!NILP (prop)) | |
4448 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4449 | } |
a615c6dc SM |
4450 | /* Test for intersecting intervals. This does the right thing |
4451 | for both insertion and deletion. */ | |
4452 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4453 | { |
a615c6dc SM |
4454 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4455 | if (!NILP (prop)) | |
4456 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4457 | } |
173f2a64 | 4458 | } |
60ebfdf3 | 4459 | |
2410d73a | 4460 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4461 | { |
a615c6dc SM |
4462 | int startpos, endpos; |
4463 | Lisp_Object ostart, oend; | |
4464 | ||
2410d73a | 4465 | XSETMISC (overlay, tail); |
a615c6dc SM |
4466 | |
4467 | ostart = OVERLAY_START (overlay); | |
4468 | oend = OVERLAY_END (overlay); | |
4469 | startpos = OVERLAY_POSITION (ostart); | |
4470 | endpos = OVERLAY_POSITION (oend); | |
4471 | if (XFASTINT (end) < startpos) | |
4472 | break; | |
4473 | if (insertion && (XFASTINT (start) == startpos | |
4474 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4475 | { |
a615c6dc SM |
4476 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4477 | if (!NILP (prop)) | |
4478 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4479 | } |
a615c6dc SM |
4480 | if (insertion && (XFASTINT (start) == endpos |
4481 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4482 | { |
a615c6dc SM |
4483 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4484 | if (!NILP (prop)) | |
4485 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4486 | } |
a615c6dc SM |
4487 | /* Test for intersecting intervals. This does the right thing |
4488 | for both insertion and deletion. */ | |
4489 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4490 | { |
a615c6dc SM |
4491 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4492 | if (!NILP (prop)) | |
4493 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4494 | } |
173f2a64 RS |
4495 | } |
4496 | } | |
55b48893 | 4497 | |
a615c6dc SM |
4498 | GCPRO4 (overlay, arg1, arg2, arg3); |
4499 | { | |
4500 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4501 | First copy the vector contents, in case some of these hooks | |
4502 | do subsequent modification of the buffer. */ | |
4503 | int size = last_overlay_modification_hooks_used; | |
4504 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4505 | int i; | |
4506 | ||
4507 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4508 | copy, size * sizeof (Lisp_Object)); | |
4509 | gcpro1.var = copy; | |
4510 | gcpro1.nvars = size; | |
4511 | ||
4512 | for (i = 0; i < size;) | |
4513 | { | |
4514 | Lisp_Object prop, overlay; | |
4515 | prop = copy[i++]; | |
4516 | overlay = copy[i++]; | |
4517 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4518 | } | |
4519 | } | |
55b48893 | 4520 | UNGCPRO; |
173f2a64 RS |
4521 | } |
4522 | ||
4523 | static void | |
930a9140 RS |
4524 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4525 | Lisp_Object list, overlay; | |
4526 | int after; | |
4527 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4528 | { |
930a9140 | 4529 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4530 | |
930a9140 | 4531 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4532 | |
6d70a280 | 4533 | while (CONSP (list)) |
173f2a64 | 4534 | { |
930a9140 | 4535 | if (NILP (arg3)) |
6d70a280 | 4536 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4537 | else |
6d70a280 SM |
4538 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4539 | list = XCDR (list); | |
173f2a64 RS |
4540 | } |
4541 | UNGCPRO; | |
4542 | } | |
9d7608b7 KH |
4543 | |
4544 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4545 | property is set. */ | |
4546 | void | |
4547 | evaporate_overlays (pos) | |
c2d5b10f | 4548 | EMACS_INT pos; |
9d7608b7 | 4549 | { |
2410d73a SM |
4550 | Lisp_Object overlay, hit_list; |
4551 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4552 | |
4553 | hit_list = Qnil; | |
c2d5b10f | 4554 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4555 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4556 | { |
4557 | int endpos; | |
2410d73a | 4558 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4559 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4560 | if (endpos < pos) | |
4561 | break; | |
4562 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4563 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4564 | hit_list = Fcons (overlay, hit_list); |
4565 | } | |
4566 | else | |
2410d73a | 4567 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4568 | { |
4569 | int startpos; | |
2410d73a | 4570 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4571 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4572 | if (startpos > pos) | |
4573 | break; | |
4574 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4575 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4576 | hit_list = Fcons (overlay, hit_list); |
4577 | } | |
7539e11f KR |
4578 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4579 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4580 | } |
173f2a64 | 4581 | \f |
54dfdeb0 | 4582 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4583 | in the slot with offset OFFSET. */ |
4584 | ||
0fa3ba92 | 4585 | void |
ad97b375 SM |
4586 | buffer_slot_type_mismatch (newval, type) |
4587 | Lisp_Object newval; | |
64e16c3c | 4588 | int type; |
0fa3ba92 | 4589 | { |
ad97b375 | 4590 | Lisp_Object predicate; |
177c0ea7 | 4591 | |
64e16c3c | 4592 | switch (type) |
0fa3ba92 | 4593 | { |
2de9f71c | 4594 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4595 | case Lisp_String: predicate = Qstringp; break; |
4596 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4597 | default: abort (); | |
0fa3ba92 JB |
4598 | } |
4599 | ||
ad97b375 | 4600 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4601 | } |
7c02e886 | 4602 | |
0fa3ba92 | 4603 | \f |
b86af064 GM |
4604 | /*********************************************************************** |
4605 | Allocation with mmap | |
4606 | ***********************************************************************/ | |
4607 | ||
4608 | #ifdef USE_MMAP_FOR_BUFFERS | |
4609 | ||
4610 | #include <sys/types.h> | |
4611 | #include <sys/mman.h> | |
4612 | ||
4613 | #ifndef MAP_ANON | |
4614 | #ifdef MAP_ANONYMOUS | |
4615 | #define MAP_ANON MAP_ANONYMOUS | |
4616 | #else | |
4617 | #define MAP_ANON 0 | |
4618 | #endif | |
4619 | #endif | |
4620 | ||
09dfdf85 GM |
4621 | #ifndef MAP_FAILED |
4622 | #define MAP_FAILED ((void *) -1) | |
4623 | #endif | |
4624 | ||
b86af064 GM |
4625 | #include <stdio.h> |
4626 | #include <errno.h> | |
4627 | ||
4628 | #if MAP_ANON == 0 | |
4629 | #include <fcntl.h> | |
4630 | #endif | |
4631 | ||
4632 | #include "coding.h" | |
4633 | ||
4634 | ||
4635 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4636 | The current implementation lets the system select mapped | |
4637 | addresses; we're not using MAP_FIXED in general, except when | |
4638 | trying to enlarge regions. | |
4639 | ||
4640 | Each mapped region starts with a mmap_region structure, the user | |
4641 | area starts after that structure, aligned to MEM_ALIGN. | |
4642 | ||
4643 | +-----------------------+ | |
4644 | | struct mmap_info + | | |
4645 | | padding | | |
4646 | +-----------------------+ | |
4647 | | user data | | |
4648 | | | | |
4649 | | | | |
4650 | +-----------------------+ */ | |
4651 | ||
4652 | struct mmap_region | |
4653 | { | |
4654 | /* User-specified size. */ | |
4655 | size_t nbytes_specified; | |
177c0ea7 | 4656 | |
b86af064 GM |
4657 | /* Number of bytes mapped */ |
4658 | size_t nbytes_mapped; | |
4659 | ||
4660 | /* Pointer to the location holding the address of the memory | |
4661 | allocated with the mmap'd block. The variable actually points | |
4662 | after this structure. */ | |
4663 | POINTER_TYPE **var; | |
4664 | ||
4665 | /* Next and previous in list of all mmap'd regions. */ | |
4666 | struct mmap_region *next, *prev; | |
4667 | }; | |
4668 | ||
4669 | /* Doubly-linked list of mmap'd regions. */ | |
4670 | ||
4671 | static struct mmap_region *mmap_regions; | |
4672 | ||
4673 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4674 | /dev/zero will be opened on it. */ | |
4675 | ||
4676 | static int mmap_fd; | |
4677 | ||
4678 | /* Temporary storage for mmap_set_vars, see there. */ | |
4679 | ||
4680 | static struct mmap_region *mmap_regions_1; | |
4681 | static int mmap_fd_1; | |
4682 | ||
4683 | /* Page size on this system. */ | |
4684 | ||
4685 | static int mmap_page_size; | |
4686 | ||
4687 | /* 1 means mmap has been intialized. */ | |
4688 | ||
4689 | static int mmap_initialized_p; | |
4690 | ||
4691 | /* Value is X rounded up to the next multiple of N. */ | |
4692 | ||
4693 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4694 | ||
4695 | /* Size of mmap_region structure plus padding. */ | |
4696 | ||
4697 | #define MMAP_REGION_STRUCT_SIZE \ | |
4698 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4699 | ||
4700 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4701 | region, return a pointer to the start of the region. */ | |
4702 | ||
4703 | #define MMAP_REGION(P) \ | |
4704 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4705 | ||
4706 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4707 | to the start of the user-visible part of the region. */ | |
4708 | ||
4709 | #define MMAP_USER_AREA(P) \ | |
4710 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4711 | ||
4712 | #define MEM_ALIGN sizeof (double) | |
4713 | ||
7273faa1 DL |
4714 | /* Predicate returning true if part of the address range [START .. END] |
4715 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4716 | memory mapping. |
4717 | ||
4718 | Default is to conservativly assume the address range is occupied by | |
4719 | something else. This can be overridden by system configuration | |
4720 | files if system-specific means to determine this exists. */ | |
4721 | ||
4722 | #ifndef MMAP_ALLOCATED_P | |
4723 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4724 | #endif | |
4725 | ||
b86af064 GM |
4726 | /* Function prototypes. */ |
4727 | ||
4728 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4729 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4730 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4731 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4732 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4733 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4734 | static void mmap_init P_ ((void)); | |
4735 | ||
4736 | ||
4737 | /* Return a region overlapping address range START...END, or null if | |
4738 | none. END is not including, i.e. the last byte in the range | |
4739 | is at END - 1. */ | |
4740 | ||
4741 | static struct mmap_region * | |
4742 | mmap_find (start, end) | |
4743 | POINTER_TYPE *start, *end; | |
4744 | { | |
4745 | struct mmap_region *r; | |
4746 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4747 | |
b86af064 GM |
4748 | for (r = mmap_regions; r; r = r->next) |
4749 | { | |
4750 | char *rstart = (char *) r; | |
4751 | char *rend = rstart + r->nbytes_mapped; | |
4752 | ||
4753 | if (/* First byte of range, i.e. START, in this region? */ | |
4754 | (s >= rstart && s < rend) | |
4755 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4756 | || (e > rstart && e <= rend) | |
4757 | /* First byte of this region in the range? */ | |
4758 | || (rstart >= s && rstart < e) | |
4759 | /* Last byte of this region in the range? */ | |
4760 | || (rend > s && rend <= e)) | |
4761 | break; | |
4762 | } | |
4763 | ||
4764 | return r; | |
4765 | } | |
4766 | ||
4767 | ||
4768 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4769 | the region. Value is non-zero if successful. */ | |
4770 | ||
4771 | static int | |
4772 | mmap_free_1 (r) | |
4773 | struct mmap_region *r; | |
4774 | { | |
4775 | if (r->next) | |
4776 | r->next->prev = r->prev; | |
4777 | if (r->prev) | |
4778 | r->prev->next = r->next; | |
4779 | else | |
4780 | mmap_regions = r->next; | |
177c0ea7 | 4781 | |
1a15cca0 | 4782 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4783 | { |
4784 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4785 | return 0; | |
4786 | } | |
4787 | ||
4788 | return 1; | |
4789 | } | |
4790 | ||
4791 | ||
4792 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4793 | Value is non-zero if successful. */ | |
4794 | ||
4795 | static int | |
4796 | mmap_enlarge (r, npages) | |
4797 | struct mmap_region *r; | |
4798 | int npages; | |
4799 | { | |
4800 | char *region_end = (char *) r + r->nbytes_mapped; | |
4801 | size_t nbytes; | |
4802 | int success = 0; | |
4803 | ||
4804 | if (npages < 0) | |
4805 | { | |
4806 | /* Unmap pages at the end of the region. */ | |
4807 | nbytes = - npages * mmap_page_size; | |
4808 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4809 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4810 | else | |
4811 | { | |
4812 | r->nbytes_mapped -= nbytes; | |
4813 | success = 1; | |
4814 | } | |
4815 | } | |
4816 | else if (npages > 0) | |
4817 | { | |
b86af064 | 4818 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4819 | |
b86af064 GM |
4820 | /* Try to map additional pages at the end of the region. We |
4821 | cannot do this if the address range is already occupied by | |
4822 | something else because mmap deletes any previous mapping. | |
4823 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4824 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4825 | { |
4826 | POINTER_TYPE *p; | |
177c0ea7 | 4827 | |
b86af064 GM |
4828 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4829 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4830 | if (p == MAP_FAILED) | |
edaa9aed | 4831 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4832 | else if (p != (POINTER_TYPE *) region_end) |
4833 | { | |
4834 | /* Kernels are free to choose a different address. In | |
4835 | that case, unmap what we've mapped above; we have | |
4836 | no use for it. */ | |
4837 | if (munmap (p, nbytes) == -1) | |
4838 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4839 | } | |
4840 | else | |
4841 | { | |
4842 | r->nbytes_mapped += nbytes; | |
4843 | success = 1; | |
4844 | } | |
4845 | } | |
4846 | } | |
4847 | ||
4848 | return success; | |
4849 | } | |
4850 | ||
4851 | ||
4852 | /* Set or reset variables holding references to mapped regions. If | |
4853 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4854 | non-zero, set all variables to the start of the user-areas | |
4855 | of mapped regions. | |
4856 | ||
4857 | This function is called from Fdump_emacs to ensure that the dumped | |
4858 | Emacs doesn't contain references to memory that won't be mapped | |
4859 | when Emacs starts. */ | |
4860 | ||
4861 | void | |
4862 | mmap_set_vars (restore_p) | |
4863 | int restore_p; | |
4864 | { | |
4865 | struct mmap_region *r; | |
4866 | ||
4867 | if (restore_p) | |
4868 | { | |
4869 | mmap_regions = mmap_regions_1; | |
4870 | mmap_fd = mmap_fd_1; | |
4871 | for (r = mmap_regions; r; r = r->next) | |
4872 | *r->var = MMAP_USER_AREA (r); | |
4873 | } | |
4874 | else | |
4875 | { | |
4876 | for (r = mmap_regions; r; r = r->next) | |
4877 | *r->var = NULL; | |
4878 | mmap_regions_1 = mmap_regions; | |
4879 | mmap_regions = NULL; | |
4880 | mmap_fd_1 = mmap_fd; | |
4881 | mmap_fd = -1; | |
4882 | } | |
4883 | } | |
4884 | ||
4885 | ||
4886 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4887 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4888 | address of some variable which will use the data area. | |
4889 | ||
4890 | The allocation of 0 bytes is valid. | |
4891 | ||
4892 | If we can't allocate the necessary memory, set *VAR to null, and | |
4893 | return null. */ | |
4894 | ||
4895 | static POINTER_TYPE * | |
4896 | mmap_alloc (var, nbytes) | |
4897 | POINTER_TYPE **var; | |
4898 | size_t nbytes; | |
4899 | { | |
4900 | void *p; | |
4901 | size_t map; | |
4902 | ||
4903 | mmap_init (); | |
4904 | ||
4905 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4906 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4907 | mmap_fd, 0); | |
177c0ea7 | 4908 | |
b86af064 GM |
4909 | if (p == MAP_FAILED) |
4910 | { | |
4911 | if (errno != ENOMEM) | |
4912 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4913 | p = NULL; | |
4914 | } | |
4915 | else | |
4916 | { | |
4917 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4918 | |
b86af064 GM |
4919 | r->nbytes_specified = nbytes; |
4920 | r->nbytes_mapped = map; | |
4921 | r->var = var; | |
4922 | r->prev = NULL; | |
4923 | r->next = mmap_regions; | |
4924 | if (r->next) | |
4925 | r->next->prev = r; | |
4926 | mmap_regions = r; | |
177c0ea7 | 4927 | |
b86af064 GM |
4928 | p = MMAP_USER_AREA (p); |
4929 | } | |
177c0ea7 | 4930 | |
b86af064 GM |
4931 | return *var = p; |
4932 | } | |
4933 | ||
4934 | ||
4935 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4936 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4937 | and return this value. If more memory cannot be allocated, then | |
4938 | leave *VAR unchanged, and return null. */ | |
4939 | ||
4940 | static POINTER_TYPE * | |
4941 | mmap_realloc (var, nbytes) | |
4942 | POINTER_TYPE **var; | |
4943 | size_t nbytes; | |
4944 | { | |
4945 | POINTER_TYPE *result; | |
177c0ea7 | 4946 | |
b86af064 GM |
4947 | mmap_init (); |
4948 | ||
4949 | if (*var == NULL) | |
4950 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4951 | else if (nbytes == 0) |
b86af064 GM |
4952 | { |
4953 | mmap_free (var); | |
4954 | result = mmap_alloc (var, nbytes); | |
4955 | } | |
4956 | else | |
4957 | { | |
4958 | struct mmap_region *r = MMAP_REGION (*var); | |
4959 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4960 | |
b86af064 GM |
4961 | if (room < nbytes) |
4962 | { | |
4963 | /* Must enlarge. */ | |
4964 | POINTER_TYPE *old_ptr = *var; | |
4965 | ||
4966 | /* Try to map additional pages at the end of the region. | |
4967 | If that fails, allocate a new region, copy data | |
4968 | from the old region, then free it. */ | |
4969 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4970 | / mmap_page_size))) | |
4971 | { | |
4972 | r->nbytes_specified = nbytes; | |
4973 | *var = result = old_ptr; | |
4974 | } | |
4975 | else if (mmap_alloc (var, nbytes)) | |
4976 | { | |
4977 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4978 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4979 | result = *var; | |
4980 | r = MMAP_REGION (result); | |
4981 | r->nbytes_specified = nbytes; | |
4982 | } | |
4983 | else | |
4984 | { | |
4985 | *var = old_ptr; | |
4986 | result = NULL; | |
4987 | } | |
4988 | } | |
4989 | else if (room - nbytes >= mmap_page_size) | |
4990 | { | |
4991 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4992 | memory back to the system. |
4993 | ||
4994 | The extra parens are to make the division happens first, | |
4995 | on positive values, so we know it will round towards | |
4996 | zero. */ | |
bb63c5c9 | 4997 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4998 | result = *var; |
4999 | r->nbytes_specified = nbytes; | |
5000 | } | |
5001 | else | |
5002 | { | |
5003 | /* Leave it alone. */ | |
5004 | result = *var; | |
5005 | r->nbytes_specified = nbytes; | |
5006 | } | |
5007 | } | |
5008 | ||
5009 | return result; | |
5010 | } | |
5011 | ||
5012 | ||
5013 | /* Free a block of relocatable storage whose data is pointed to by | |
5014 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
5015 | ||
5016 | static void | |
5017 | mmap_free (var) | |
5018 | POINTER_TYPE **var; | |
5019 | { | |
5020 | mmap_init (); | |
177c0ea7 | 5021 | |
b86af064 GM |
5022 | if (*var) |
5023 | { | |
5024 | mmap_free_1 (MMAP_REGION (*var)); | |
5025 | *var = NULL; | |
5026 | } | |
5027 | } | |
5028 | ||
5029 | ||
5030 | /* Perform necessary intializations for the use of mmap. */ | |
5031 | ||
5032 | static void | |
5033 | mmap_init () | |
5034 | { | |
5035 | #if MAP_ANON == 0 | |
5036 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
5037 | in a dumped Emacs. */ | |
5038 | if (mmap_fd <= 0) | |
5039 | { | |
5040 | /* No anonymous mmap -- we need the file descriptor. */ | |
5041 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
5042 | if (mmap_fd == -1) | |
5043 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
5044 | } | |
5045 | #endif /* MAP_ANON == 0 */ | |
5046 | ||
5047 | if (mmap_initialized_p) | |
5048 | return; | |
5049 | mmap_initialized_p = 1; | |
177c0ea7 | 5050 | |
b86af064 GM |
5051 | #if MAP_ANON != 0 |
5052 | mmap_fd = -1; | |
5053 | #endif | |
177c0ea7 | 5054 | |
b86af064 GM |
5055 | mmap_page_size = getpagesize (); |
5056 | } | |
5057 | ||
5058 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
5059 | ||
5060 | ||
5061 | \f | |
5062 | /*********************************************************************** | |
5063 | Buffer-text Allocation | |
5064 | ***********************************************************************/ | |
5065 | ||
5066 | #ifdef REL_ALLOC | |
5067 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
5068 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
5069 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
5070 | #endif /* REL_ALLOC */ | |
5071 | ||
5072 | ||
5073 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
5074 | ||
5075 | static void | |
5076 | alloc_buffer_text (b, nbytes) | |
5077 | struct buffer *b; | |
5078 | size_t nbytes; | |
5079 | { | |
5080 | POINTER_TYPE *p; | |
177c0ea7 | 5081 | |
b86af064 GM |
5082 | BLOCK_INPUT; |
5083 | #if defined USE_MMAP_FOR_BUFFERS | |
5084 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5085 | #elif defined REL_ALLOC | |
5086 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5087 | #else | |
815add84 | 5088 | p = xmalloc (nbytes); |
b86af064 | 5089 | #endif |
177c0ea7 | 5090 | |
b86af064 GM |
5091 | if (p == NULL) |
5092 | { | |
5093 | UNBLOCK_INPUT; | |
5094 | memory_full (); | |
5095 | } | |
5096 | ||
5097 | b->text->beg = (unsigned char *) p; | |
5098 | UNBLOCK_INPUT; | |
5099 | } | |
5100 | ||
5101 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5102 | shrink it. */ | |
5103 | ||
5104 | void | |
5371d722 | 5105 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
5106 | { |
5107 | POINTER_TYPE *p; | |
5108 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
5109 | + delta); | |
5110 | BLOCK_INPUT; | |
5111 | #if defined USE_MMAP_FOR_BUFFERS | |
5112 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5113 | #elif defined REL_ALLOC | |
5114 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5115 | #else | |
5116 | p = xrealloc (b->text->beg, nbytes); | |
5117 | #endif | |
177c0ea7 | 5118 | |
b86af064 GM |
5119 | if (p == NULL) |
5120 | { | |
5121 | UNBLOCK_INPUT; | |
5122 | memory_full (); | |
5123 | } | |
5124 | ||
5125 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
5126 | UNBLOCK_INPUT; | |
5127 | } | |
5128 | ||
5129 | ||
5130 | /* Free buffer B's text buffer. */ | |
5131 | ||
5132 | static void | |
5133 | free_buffer_text (b) | |
5134 | struct buffer *b; | |
5135 | { | |
5136 | BLOCK_INPUT; | |
5137 | ||
5138 | #if defined USE_MMAP_FOR_BUFFERS | |
5139 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
5140 | #elif defined REL_ALLOC | |
5141 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
5142 | #else | |
5143 | xfree (b->text->beg); | |
5144 | #endif | |
177c0ea7 | 5145 | |
b86af064 GM |
5146 | BUF_BEG_ADDR (b) = NULL; |
5147 | UNBLOCK_INPUT; | |
5148 | } | |
5149 | ||
5150 | ||
5151 | \f | |
5152 | /*********************************************************************** | |
5153 | Initialization | |
5154 | ***********************************************************************/ | |
5155 | ||
dfcf069d | 5156 | void |
1ab256cb RM |
5157 | init_buffer_once () |
5158 | { | |
7c02e886 GM |
5159 | int idx; |
5160 | ||
5161 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 5162 | |
1ab256cb RM |
5163 | /* Make sure all markable slots in buffer_defaults |
5164 | are initialized reasonably, so mark_buffer won't choke. */ | |
5165 | reset_buffer (&buffer_defaults); | |
13de9290 | 5166 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 5167 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5168 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5169 | /* Prevent GC from getting confused. */ |
5170 | buffer_defaults.text = &buffer_defaults.own_text; | |
5171 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5172 | BUF_INTERVALS (&buffer_defaults) = 0; |
5173 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5174 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5175 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5176 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5177 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5178 | |
5179 | /* Set up the default values of various buffer slots. */ | |
5180 | /* Must do these before making the first buffer! */ | |
5181 | ||
f532dca0 | 5182 | /* real setup is done in bindings.el */ |
d67b4f80 | 5183 | buffer_defaults.mode_line_format = make_pure_c_string ("%-"); |
045dee35 | 5184 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5185 | buffer_defaults.abbrev_mode = Qnil; |
5186 | buffer_defaults.overwrite_mode = Qnil; | |
5187 | buffer_defaults.case_fold_search = Qt; | |
5188 | buffer_defaults.auto_fill_function = Qnil; | |
5189 | buffer_defaults.selective_display = Qnil; | |
5190 | #ifndef old | |
5191 | buffer_defaults.selective_display_ellipses = Qt; | |
5192 | #endif | |
5193 | buffer_defaults.abbrev_table = Qnil; | |
5194 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5195 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5196 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5197 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5198 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5199 | buffer_defaults.overlays_before = NULL; |
5200 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5201 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5202 | |
8d7a4592 | 5203 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb | 5204 | buffer_defaults.truncate_lines = Qnil; |
0858cd02 | 5205 | buffer_defaults.word_wrap = Qnil; |
1ab256cb | 5206 | buffer_defaults.ctl_arrow = Qt; |
3b06f880 | 5207 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 5208 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5209 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5210 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5211 | |
f7975d07 | 5212 | #ifdef DOS_NT |
0776cb1b | 5213 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5214 | #endif |
a1a17b61 | 5215 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5216 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5217 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5218 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5219 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5220 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5221 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5222 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5223 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5224 | buffer_defaults.left_fringe_width = Qnil; | |
5225 | buffer_defaults.right_fringe_width = Qnil; | |
5226 | buffer_defaults.fringes_outside_margins = Qnil; | |
5227 | buffer_defaults.scroll_bar_width = Qnil; | |
5228 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5229 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5230 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5231 | buffer_defaults.fringe_indicator_alist = Qnil; |
5232 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5233 | buffer_defaults.scroll_up_aggressively = Qnil; |
5234 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5235 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5236 | |
5237 | /* Assign the local-flags to the slots that have default values. | |
5238 | The local flag is a bit that is used in the buffer | |
5239 | to say that it has its own local value for the slot. | |
5240 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5241 | ||
5242 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5243 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5244 | |
5245 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5246 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5247 | XSETINT (buffer_local_flags.filename, -1); |
5248 | XSETINT (buffer_local_flags.directory, -1); | |
5249 | XSETINT (buffer_local_flags.backed_up, -1); | |
5250 | XSETINT (buffer_local_flags.save_length, -1); | |
5251 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5252 | XSETINT (buffer_local_flags.read_only, -1); | |
5253 | XSETINT (buffer_local_flags.major_mode, -1); | |
5254 | XSETINT (buffer_local_flags.mode_name, -1); | |
5255 | XSETINT (buffer_local_flags.undo_list, -1); | |
5256 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5257 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5258 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5259 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5260 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5261 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5262 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5263 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5264 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5265 | |
7c02e886 GM |
5266 | idx = 1; |
5267 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5268 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5269 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5270 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5271 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5272 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5273 | #ifndef old |
7c02e886 | 5274 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5275 | #endif |
7c02e886 GM |
5276 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5277 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
0858cd02 | 5278 | XSETFASTINT (buffer_local_flags.word_wrap, idx); ++idx; |
7c02e886 GM |
5279 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; |
5280 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5281 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5282 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5283 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5284 | #ifdef DOS_NT |
7c02e886 | 5285 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5286 | /* Make this one a permanent local. */ |
7c02e886 | 5287 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5288 | #endif |
7c02e886 GM |
5289 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5290 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5291 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5292 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5293 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5294 | /* Make this one a permanent local. */ |
7c02e886 | 5295 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5296 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5297 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5298 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5299 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5300 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5301 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5302 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5303 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5304 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5305 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5306 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5307 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5308 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5309 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5310 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5311 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5312 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5313 | |
5314 | /* Need more room? */ | |
7313acd0 | 5315 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5316 | abort (); |
7313acd0 | 5317 | last_per_buffer_idx = idx; |
177c0ea7 | 5318 | |
1ab256cb RM |
5319 | Vbuffer_alist = Qnil; |
5320 | current_buffer = 0; | |
5321 | all_buffers = 0; | |
5322 | ||
f4265f6c | 5323 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5324 | |
d67b4f80 | 5325 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
1ab256cb RM |
5326 | buffer_defaults.major_mode = Qfundamental_mode; |
5327 | ||
d67b4f80 | 5328 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5329 | |
d67b4f80 | 5330 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5331 | |
d67b4f80 | 5332 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5333 | |
d67b4f80 | 5334 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5335 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5336 | |
d67b4f80 | 5337 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5338 | |
1ab256cb | 5339 | /* super-magic invisible buffer */ |
d67b4f80 | 5340 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5341 | Vbuffer_alist = Qnil; |
5342 | ||
d67b4f80 | 5343 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5344 | |
5345 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5346 | } |
5347 | ||
dfcf069d | 5348 | void |
1ab256cb RM |
5349 | init_buffer () |
5350 | { | |
2381d133 | 5351 | char *pwd; |
136351b7 | 5352 | Lisp_Object temp; |
b639c9be | 5353 | int len; |
1ab256cb | 5354 | |
b86af064 | 5355 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5356 | { |
5357 | /* When using the ralloc implementation based on mmap(2), buffer | |
5358 | text pointers will have been set to null in the dumped Emacs. | |
5359 | Map new memory. */ | |
5360 | struct buffer *b; | |
177c0ea7 | 5361 | |
93c27ef1 GM |
5362 | for (b = all_buffers; b; b = b->next) |
5363 | if (b->text->beg == NULL) | |
b86af064 | 5364 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5365 | } |
b86af064 | 5366 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5367 | |
1ab256cb | 5368 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5369 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5370 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5371 | |
01537133 | 5372 | pwd = get_current_dir_name (); |
a17b5ed1 | 5373 | |
156bdb41 | 5374 | if (!pwd) |
a17b5ed1 | 5375 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5376 | |
1ab256cb RM |
5377 | /* Maybe this should really use some standard subroutine |
5378 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5379 | len = strlen (pwd); |
5380 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5381 | { |
156bdb41 | 5382 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5383 | pwd = (char *) realloc (pwd, len + 2); |
5384 | if (!pwd) | |
5385 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5386 | pwd[len] = DIRECTORY_SEP; |
5387 | pwd[len + 1] = '\0'; | |
f7975d07 | 5388 | } |
0995fa35 | 5389 | |
01537133 | 5390 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5391 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5392 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5393 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5394 | that ENCODE_FILE correctly gets the original bytes. */ |
5395 | current_buffer->directory | |
5396 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5397 | |
0995fa35 RS |
5398 | /* Add /: to the front of the name |
5399 | if it would otherwise be treated as magic. */ | |
5400 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5401 | if (! NILP (temp) |
5402 | /* If the default dir is just /, TEMP is non-nil | |
5403 | because of the ange-ftp completion handler. | |
5404 | However, it is not necessary to turn / into /:/. | |
5405 | So avoid doing that. */ | |
d5db4077 | 5406 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5407 | current_buffer->directory |
5408 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5409 | ||
136351b7 RS |
5410 | temp = get_minibuffer (0); |
5411 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5412 | |
5413 | free (pwd); | |
1ab256cb RM |
5414 | } |
5415 | ||
d6aa1876 SM |
5416 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5417 | Object stored in the current buffer. address is the address of the slot | |
5418 | in the buffer that is current now. */ | |
5419 | ||
5420 | /* TYPE is nil for a general Lisp variable. | |
5421 | An integer specifies a type; then only LIsp values | |
5422 | with that type code are allowed (except that nil is allowed too). | |
5423 | LNAME is the LIsp-level variable name. | |
5424 | VNAME is the name of the buffer slot. | |
5425 | DOC is a dummy where you write the doc string as a comment. */ | |
5426 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ | |
5427 | defvar_per_buffer (lname, vname, type, 0) | |
5428 | ||
5429 | static void | |
5430 | defvar_per_buffer (namestring, address, type, doc) | |
5431 | char *namestring; | |
5432 | Lisp_Object *address; | |
5433 | Lisp_Object type; | |
5434 | char *doc; | |
5435 | { | |
5436 | Lisp_Object sym, val; | |
5437 | int offset; | |
5438 | ||
5439 | sym = intern (namestring); | |
5440 | val = allocate_misc (); | |
5441 | offset = (char *)address - (char *)current_buffer; | |
5442 | ||
5443 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; | |
5444 | XBUFFER_OBJFWD (val)->offset = offset; | |
64e16c3c | 5445 | XBUFFER_OBJFWD (val)->slottype = type; |
d6aa1876 SM |
5446 | SET_SYMBOL_VALUE (sym, val); |
5447 | PER_BUFFER_SYMBOL (offset) = sym; | |
d6aa1876 SM |
5448 | |
5449 | if (PER_BUFFER_IDX (offset) == 0) | |
5450 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5451 | slot of buffer_local_flags */ | |
5452 | abort (); | |
5453 | } | |
5454 | ||
5455 | ||
1ab256cb | 5456 | /* initialize the buffer routines */ |
dfcf069d | 5457 | void |
1ab256cb RM |
5458 | syms_of_buffer () |
5459 | { | |
9115729e KH |
5460 | staticpro (&last_overlay_modification_hooks); |
5461 | last_overlay_modification_hooks | |
5462 | = Fmake_vector (make_number (10), Qnil); | |
5463 | ||
1ab256cb RM |
5464 | staticpro (&Vbuffer_defaults); |
5465 | staticpro (&Vbuffer_local_symbols); | |
5466 | staticpro (&Qfundamental_mode); | |
5467 | staticpro (&Qmode_class); | |
5468 | staticpro (&QSFundamental); | |
5469 | staticpro (&Vbuffer_alist); | |
5470 | staticpro (&Qprotected_field); | |
5471 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5472 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5473 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5474 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5475 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5476 | staticpro (&Qoverlayp); |
d67b4f80 | 5477 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5478 | staticpro (&Qevaporate); |
d67b4f80 | 5479 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5480 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5481 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5482 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5483 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5484 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5485 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5486 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5487 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5488 | staticpro (&Qpriority); |
d67b4f80 | 5489 | Qwindow = intern_c_string ("window"); |
5985d248 | 5490 | staticpro (&Qwindow); |
d67b4f80 | 5491 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5492 | staticpro (&Qbefore_string); |
d67b4f80 | 5493 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5494 | staticpro (&Qafter_string); |
d67b4f80 | 5495 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5496 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5497 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5498 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5499 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5500 | staticpro (&Qafter_change_functions); |
2f7a359d | 5501 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5502 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5503 | |
d67b4f80 | 5504 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5505 | staticpro (&Qkill_buffer_query_functions); |
5506 | ||
1ab256cb | 5507 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5508 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5509 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5510 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb RM |
5511 | |
5512 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5513 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5514 | ||
5515 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5516 | &buffer_defaults.mode_line_format, |
5517 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5518 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5519 | |
045dee35 | 5520 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5521 | &buffer_defaults.header_line_format, |
5522 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5523 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5524 | |
7ee72033 MB |
5525 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5526 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5527 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5528 | |
a3bbced0 | 5529 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5530 | &buffer_defaults.extra_line_spacing, |
5531 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5532 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5533 | |
187ccf49 KS |
5534 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5535 | &buffer_defaults.cursor_in_non_selected_windows, | |
5536 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5537 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5538 | ||
1ab256cb | 5539 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5540 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5541 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5542 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5543 | |
5544 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5545 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5546 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5547 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5548 | |
5e2ad10b JB |
5549 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5550 | &buffer_defaults.direction_reversed, | |
5551 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5552 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5553 | |
5e2ad10b JB |
5554 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5555 | &buffer_defaults.enable_multibyte_characters, | |
5556 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5557 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5558 | |
5e2ad10b JB |
5559 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5560 | &buffer_defaults.buffer_file_coding_system, | |
5561 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5562 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5563 | |
1ab256cb | 5564 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5565 | &buffer_defaults.truncate_lines, |
5566 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5567 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5568 | |
5569 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5570 | &buffer_defaults.fill_column, |
5571 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5572 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5573 | |
5574 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5575 | &buffer_defaults.left_margin, |
5576 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5577 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5578 | |
5579 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5580 | &buffer_defaults.tab_width, |
23625946 | 5581 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5582 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5583 | |
5584 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5585 | &buffer_defaults.case_fold_search, |
5586 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5587 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5588 | |
f7975d07 | 5589 | #ifdef DOS_NT |
177c0ea7 | 5590 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5591 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5592 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5593 | This is the same as (default-value 'buffer-file-type). |
5594 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5595 | #endif |
5596 | ||
0552666b | 5597 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5598 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5599 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5600 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5601 | |
5602 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5603 | &buffer_defaults.right_margin_cols, |
5604 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5605 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5606 | |
2ad8731a KS |
5607 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5608 | &buffer_defaults.left_fringe_width, | |
5609 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5610 | This is the same as (default-value 'left-fringe-width). */); | |
5611 | ||
5612 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5613 | &buffer_defaults.right_fringe_width, | |
5614 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5615 | This is the same as (default-value 'right-fringe-width). */); | |
5616 | ||
5617 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5618 | &buffer_defaults.fringes_outside_margins, | |
5619 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5620 | This is the same as (default-value 'fringes-outside-margins). */); | |
5621 | ||
5622 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5623 | &buffer_defaults.scroll_bar_width, | |
5624 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5625 | This is the same as (default-value 'scroll-bar-width). */); | |
5626 | ||
5627 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5628 | &buffer_defaults.vertical_scroll_bar_type, | |
5629 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5630 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5631 | ||
0552666b | 5632 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5633 | &buffer_defaults.indicate_empty_lines, |
5634 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5635 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5636 | |
6b61353c KH |
5637 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5638 | &buffer_defaults.indicate_buffer_boundaries, | |
5639 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5640 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5641 | ||
c6a46372 KS |
5642 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5643 | &buffer_defaults.fringe_indicator_alist, | |
5644 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5645 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5646 | ||
5647 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5648 | &buffer_defaults.fringe_cursor_alist, | |
5649 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5650 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5651 | ||
0552666b | 5652 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5653 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5654 | doc: /* Default value of `scroll-up-aggressively'. |
5655 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5656 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5657 | |
0552666b | 5658 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5659 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5660 | doc: /* Default value of `scroll-down-aggressively'. |
5661 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5662 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5663 | |
045dee35 | 5664 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5665 | ¤t_buffer->header_line_format, |
7ee72033 | 5666 | Qnil, |
7614d762 RS |
5667 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5668 | The header line appears, optionally, at the top of a window; | |
5669 | the mode line appears at the bottom. */); | |
177c0ea7 | 5670 | |
1ab256cb | 5671 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5672 | Qnil, |
5673 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5674 | Each buffer has its own value of this variable. |
5675 | Value may be nil, a string, a symbol or a list or cons cell. | |
5676 | A value of nil means don't display a mode line. | |
5677 | For a symbol, its value is used (but it is ignored if t or nil). | |
5678 | A string appearing directly as the value of a symbol is processed verbatim | |
5679 | in that the %-constructs below are not recognized. | |
ed463255 | 5680 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5681 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5682 | in the value of that symbol will be ignored. |
018ba359 | 5683 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5684 | is used as a mode line element. Be careful--FORM should not load any files, |
5685 | because that can cause an infinite recursion. | |
ed463255 KS |
5686 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5687 | with the specified properties PROPS applied. | |
018ba359 PJ |
5688 | For a list whose car is a symbol, the symbol's value is taken, |
5689 | and if that is non-nil, the cadr of the list is processed recursively. | |
5690 | Otherwise, the caddr of the list (if there is one) is processed. | |
5691 | For a list whose car is a string or list, each element is processed | |
5692 | recursively and the results are effectively concatenated. | |
5693 | For a list whose car is an integer, the cdr of the list is processed | |
5694 | and padded (if the number is positive) or truncated (if negative) | |
5695 | to the width specified by that number. | |
5696 | A string is printed verbatim in the mode line except for %-constructs: | |
5697 | (%-constructs are allowed when the string is the entire mode-line-format | |
5698 | or when it is found in a cons-cell or a list) | |
5699 | %b -- print buffer name. %f -- print visited file name. | |
5700 | %F -- print frame name. | |
5701 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5702 | %& is like %*, but ignore read-only-ness. | |
5703 | % means buffer is read-only and * means it is modified. | |
5704 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5705 | %s -- print process status. %l -- print the current line number. | |
5706 | %c -- print the current column number (this makes editing slower). | |
5707 | To make the column number update correctly in all cases, | |
5708 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5709 | %i -- print the size of the buffer. |
5710 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5711 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5712 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5713 | or print Bottom or All. | |
018ba359 | 5714 | %n -- print Narrow if appropriate. |
dafbe726 | 5715 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5716 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5717 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5718 | %e -- print error message about full memory. |
f7165034 NR |
5719 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5720 | remote machine. | |
018ba359 PJ |
5721 | %[ -- print one [ for each recursive editing level. %] similar. |
5722 | %% -- print %. %- -- print infinitely many dashes. | |
5723 | Decimal digits after the % specify field width to which to pad. */); | |
5724 | ||
7ee72033 | 5725 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
5a021dd0 | 5726 | doc: /* *Value of `major-mode' for new buffers. */); |
1ab256cb RM |
5727 | |
5728 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5729 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5730 | doc: /* Symbol for current buffer's major mode. |
5731 | The default value (normally `fundamental-mode') affects new buffers. | |
5732 | A value of nil means to use the current buffer's major mode, provided | |
5733 | it is not marked as "special". | |
5734 | ||
5735 | When a mode is used by default, `find-file' switches to it before it | |
5736 | reads the contents into the buffer and before it finishes setting up | |
5737 | the buffer. Thus, the mode and its hooks should not expect certain | |
5738 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5739 | to be set up. */); | |
1ab256cb RM |
5740 | |
5741 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5742 | Qnil, |
64a7c220 | 5743 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5744 | Usually a string, but can use any of the constructs for `mode-line-format', |
5745 | which see. | |
5746 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5747 | |
d6aa1876 SM |
5748 | DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil, |
5749 | doc: /* Local (mode-specific) abbrev table of current buffer. */); | |
5750 | ||
7ee72033 | 5751 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5752 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5753 | |
5754 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5755 | Qnil, |
efc7e75f | 5756 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5757 | |
5758 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
2de9f71c | 5759 | make_number (LISP_INT_TAG), |
1ac5826d | 5760 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5761 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5762 | |
5763 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
2de9f71c | 5764 | make_number (LISP_INT_TAG), |
fc961256 | 5765 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5766 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5767 | |
5768 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
2de9f71c | 5769 | make_number (LISP_INT_TAG), |
efc7e75f | 5770 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5771 | |
7ee72033 | 5772 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5773 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5774 | A value of nil means use backslash and octal digits. |
5775 | This variable does not apply to characters whose display is specified | |
5776 | in the current display table (if there is one). */); | |
1ab256cb | 5777 | |
3b06f880 | 5778 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5779 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5780 | Qnil, |
efc7e75f | 5781 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5782 | Otherwise they are regarded as unibyte. This affects the display, |
5783 | file I/O and the behavior of various editing commands. | |
5784 | ||
5785 | This variable is buffer-local but you cannot set it directly; | |
5786 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5787 | Changing its default value with `setq-default' is supported. | |
5788 | See also variable `default-enable-multibyte-characters' and Info node | |
5789 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5790 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5791 | |
c71b5d9b | 5792 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5793 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5794 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5795 | This variable applies to saving the buffer, and also to `write-region' |
5796 | and other functions that use `write-region'. | |
5797 | It does not apply to sending output to subprocesses, however. | |
5798 | ||
5799 | If this is nil, the buffer is saved without any code conversion | |
5800 | unless some coding system is specified in `file-coding-system-alist' | |
5801 | for the buffer file. | |
5802 | ||
31a6cb06 EZ |
5803 | If the text to be saved cannot be encoded as specified by this variable, |
5804 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5805 | ||
018ba359 PJ |
5806 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5807 | ||
5808 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5809 | |
3b06f880 | 5810 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5811 | Qnil, |
efc7e75f | 5812 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5813 | |
7ee72033 | 5814 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5815 | doc: /* *Non-nil means do not display continuation lines. |
5816 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5817 | |
5818 | Note that this is overridden by the variable | |
5819 | `truncate-partial-width-windows' if that variable is non-nil | |
5820 | and this buffer is not full-frame width. */); | |
1ab256cb | 5821 | |
0858cd02 CY |
5822 | DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer->word_wrap, Qnil, |
5823 | doc: /* *Non-nil means to use word-wrapping for continuation lines. | |
5824 | When word-wrapping is on, continuation lines are wrapped at the space | |
5825 | or tab character nearest to the right window edge. | |
5826 | If nil, continuation lines are wrapped at the right screen edge. | |
5827 | ||
5828 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5829 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5830 | word-wrapping, you might want to reduce the value of | |
5831 | `truncate-partial-width-windows', since wrapping can make text readable | |
5832 | in narrower windows. */); | |
0858cd02 | 5833 | |
f7975d07 | 5834 | #ifdef DOS_NT |
54ad07d3 | 5835 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5836 | Qnil, |
efc7e75f | 5837 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5838 | This variable is meaningful on MS-DOG and Windows NT. |
5839 | On those systems, it is automatically local in every buffer. | |
5840 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5841 | #endif |
5842 | ||
1ab256cb | 5843 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5844 | make_number (Lisp_String), |
efc7e75f | 5845 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5846 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5847 | |
5848 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5849 | Qnil, |
efc7e75f | 5850 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5851 | It is called after self-inserting any character specified in |
5852 | the `auto-fill-chars' table. | |
5853 | NOTE: This variable is not a hook; | |
5854 | its value may not be a list of functions. */); | |
1ab256cb RM |
5855 | |
5856 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5857 | make_number (Lisp_String), |
efc7e75f | 5858 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5859 | |
f6ed2e84 | 5860 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5861 | make_number (Lisp_String), |
efc7e75f | 5862 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5863 | The truename of a file is calculated by `file-truename' |
5864 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5865 | |
1ab256cb | 5866 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5867 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5868 | make_number (Lisp_String), |
7614d762 RS |
5869 | doc: /* Name of file for auto-saving current buffer. |
5870 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5871 | |
7ee72033 | 5872 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5873 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5874 | |
7ee72033 | 5875 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5876 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5877 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5878 | |
5879 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
2de9f71c | 5880 | make_number (LISP_INT_TAG), |
efc7e75f | 5881 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5882 | 0 initially. |
5883 | -1 means auto-saving turned off until next real save. | |
5884 | ||
5885 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5886 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5887 | you probably should set this to -2 in that buffer. */); | |
1ab256cb RM |
5888 | |
5889 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5890 | Qnil, |
7614d762 | 5891 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5892 | An integer N as value means display only lines |
5893 | that start with less than N columns of space. | |
7614d762 RS |
5894 | A value of t means that the character ^M makes itself and |
5895 | all the rest of the line invisible; also, when saving the buffer | |
5896 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5897 | |
5898 | #ifndef old | |
5899 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
d765e3a3 | 5900 | ¤t_buffer->selective_display_ellipses, |
7ee72033 | 5901 | Qnil, |
3f676284 | 5902 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5903 | #endif |
5904 | ||
7ee72033 | 5905 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5906 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5907 | The value should be one of `overwrite-mode-textual', |
5908 | `overwrite-mode-binary', or nil. | |
5909 | If it is `overwrite-mode-textual', self-insertion still | |
5910 | inserts at the end of a line, and inserts when point is before a tab, | |
5911 | until the tab is filled in. | |
5912 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5913 | ||
54939090 | 5914 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5915 | Qnil, |
efc7e75f | 5916 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5917 | |
5918 | If this variable is nil, the value of `standard-display-table' is used. | |
5919 | Each window can have its own, overriding display table, see | |
5920 | `set-window-display-table' and `window-display-table'. | |
5921 | ||
5922 | The display table is a char-table created with `make-display-table'. | |
5923 | A char-table is an array indexed by character codes. Normal array | |
5924 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5925 | ||
5926 | Each of the char-table elements control how to display the corresponding | |
5927 | text character: the element at index C in the table says how to display | |
5928 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5929 | characters or nil. The value nil means display the character in the |
5930 | default fashion; otherwise, the characters from the vector are delivered | |
5931 | to the screen instead of the original character. | |
018ba359 | 5932 | |
5fd11dc8 | 5933 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5934 | to display a capital Y instead of each X character. |
018ba359 PJ |
5935 | |
5936 | In addition, a char-table has six extra slots to control the display of: | |
5937 | ||
5938 | the end of a truncated screen line (extra-slot 0, a single character); | |
5939 | the end of a continued line (extra-slot 1, a single character); | |
5940 | the escape character used to display character codes in octal | |
5941 | (extra-slot 2, a single character); | |
5942 | the character used as an arrow for control characters (extra-slot 3, | |
5943 | a single character); | |
5944 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5945 | a vector of characters); | |
5946 | the character used to draw the border between side-by-side windows | |
5947 | (extra-slot 5, a single character). | |
5948 | ||
5949 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5950 | |
2ad8731a | 5951 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5952 | Qnil, |
efc7e75f | 5953 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5954 | A value of nil means no marginal area. */); |
177c0ea7 | 5955 | |
2ad8731a | 5956 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5957 | Qnil, |
efc7e75f | 5958 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5959 | A value of nil means no marginal area. */); |
177c0ea7 | 5960 | |
2ad8731a KS |
5961 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5962 | Qnil, | |
5963 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5964 | A value of 0 means no left fringe is shown in this buffer's window. | |
5965 | A value of nil means to use the left fringe width from the window's frame. */); | |
5966 | ||
5967 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5968 | Qnil, | |
5969 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5970 | A value of 0 means no right fringe is shown in this buffer's window. | |
5971 | A value of nil means to use the right fringe width from the window's frame. */); | |
5972 | ||
5973 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5974 | Qnil, | |
5975 | doc: /* *Non-nil means to display fringes outside display margins. | |
5976 | A value of nil means to display fringes between margins and buffer text. */); | |
5977 | ||
5978 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5979 | Qnil, | |
5980 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5981 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5982 | ||
5983 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5984 | Qnil, | |
5985 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5986 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5987 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5988 | |
fc2c8887 RS |
5989 | A value of `left' or `right' means put the vertical scroll bar at that side |
5990 | of the window; a value of nil means don't show any vertical scroll bars. | |
5991 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5992 | |
0552666b | 5993 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5994 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5995 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5996 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5997 | window-systems. */); | |
177c0ea7 | 5998 | |
6b61353c KH |
5999 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
6000 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
6001 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
6002 | If non-nil, the first and last line of the buffer are marked in the fringe | |
6003 | of a window on window-systems with angle bitmaps, or if the window can be | |
6004 | scrolled, the top and bottom line of the window are marked with up and down | |
6005 | arrow bitmaps. | |
b2229037 KS |
6006 | |
6007 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 6008 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 6009 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 6010 | the left fringe but no arrows. |
b2229037 | 6011 | |
79e3497d RS |
6012 | You can exercise more precise control by using an alist as the |
6013 | value. Each alist element (INDICATOR . POSITION) specifies | |
6014 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
6015 | `bottom', `up', `down', or t, which specifies the default position, |
6016 | and POSITION is one of `left', `right', or nil, meaning do not show | |
6017 | this indicator. | |
6018 | ||
6019 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
6020 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 6021 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 6022 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 6023 | |
c6a46372 KS |
6024 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
6025 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
6026 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
6027 | The value is an alist where each element (INDICATOR . BITMAPS) | |
6028 | specifies the fringe bitmaps used to display a specific logical | |
6029 | fringe indicator. | |
6030 | ||
6031 | INDICATOR specifies the logical indicator type which is one of the | |
6032 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
6033 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
6034 | ||
6035 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
6036 | the actual bitmap shown in the left or right fringe for the logical | |
6037 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
6038 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
6039 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 6040 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
6041 | symbol which is used in both left and right fringes. */); |
6042 | ||
6043 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
6044 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
6045 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
6046 | The value is an alist where each element (CURSOR . BITMAP) | |
6047 | specifies the fringe bitmaps used to display a specific logical | |
6048 | cursor type in the fringe. | |
6049 | ||
6050 | CURSOR specifies the logical cursor type which is one of the following | |
6051 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
6052 | one is used to show a hollow cursor on narrow lines display lines | |
6053 | where the normal hollow cursor will not fit. | |
6054 | ||
6055 | BITMAP is the corresponding fringe bitmap shown for the logical | |
6056 | cursor type. */); | |
6057 | ||
0552666b | 6058 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 6059 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
6060 | doc: /* How far to scroll windows upward. |
6061 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 6062 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6063 | means scroll to center point. A fraction means scroll to put point |
6064 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
6065 | When the value is 0.0, point goes at the bottom line, which in the |
6066 | simple case that you moved off with C-f means scrolling just one line. | |
6067 | 1.0 means point goes at the top, so that in that simple case, the | |
6068 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6069 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6070 | |
0552666b | 6071 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 6072 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
6073 | doc: /* How far to scroll windows downward. |
6074 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 6075 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6076 | means scroll to center point. A fraction means scroll to put point |
6077 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6078 | When the value is 0.0, point goes at the top line, which in the |
6079 | simple case that you moved off with C-b means scrolling just one line. | |
6080 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6081 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6082 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6083 | |
1ab256cb RM |
6084 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
6085 | "Don't ask."); | |
6086 | */ | |
1ab256cb | 6087 | |
7ee72033 MB |
6088 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
6089 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
6090 | Two arguments are passed to each function: the positions of |
6091 | the beginning and end of the range of old text to be changed. | |
6092 | \(For an insertion, the beginning and end are at the same place.) | |
6093 | No information is given about the length of the text after the change. | |
6094 | ||
6095 | Buffer changes made while executing the `before-change-functions' | |
6096 | don't call any before-change or after-change functions. | |
6097 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
6098 | As a result, a hook function cannot straightforwardly alter the |
6099 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
6100 | accomplishing an equivalent result by using other variables. |
6101 | ||
6102 | If an unhandled error happens in running these functions, | |
6103 | the variable's value remains nil. That prevents the error | |
6104 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6105 | Vbefore_change_functions = Qnil; |
6106 | ||
7ee72033 | 6107 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 6108 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6109 | Three arguments are passed to each function: the positions of |
6110 | the beginning and end of the range of changed text, | |
6111 | and the length in bytes of the pre-change text replaced by that range. | |
6112 | \(For an insertion, the pre-change length is zero; | |
6113 | for a deletion, that length is the number of bytes deleted, | |
6114 | and the post-change beginning and end are at the same place.) | |
6115 | ||
6116 | Buffer changes made while executing the `after-change-functions' | |
6117 | don't call any before-change or after-change functions. | |
6118 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
6119 | As a result, a hook function cannot straightforwardly alter the |
6120 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
6121 | accomplishing an equivalent result by using other variables. |
6122 | ||
6123 | If an unhandled error happens in running these functions, | |
6124 | the variable's value remains nil. That prevents the error | |
6125 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6126 | Vafter_change_functions = Qnil; |
6127 | ||
7ee72033 | 6128 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 6129 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6130 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6131 | Vfirst_change_hook = Qnil; |
1ab256cb | 6132 | |
7ee72033 MB |
6133 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
6134 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
6135 | Recent changes come first; older changes follow newer. |
6136 | ||
6137 | An entry (BEG . END) represents an insertion which begins at | |
6138 | position BEG and ends at position END. | |
6139 | ||
6140 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6141 | from (abs POSITION). If POSITION is positive, point was at the front | |
6142 | of the text being deleted; if negative, point was at the end. | |
6143 | ||
6144 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
6145 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
6146 | of the visited file's modification time, as of that time. If the | |
6147 | modification time of the most recent save is different, this entry is | |
6148 | obsolete. | |
6149 | ||
6150 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6151 | was modified between BEG and END. PROPERTY is the property name, | |
6152 | and VALUE is the old value. | |
6153 | ||
7405f386 KS |
6154 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6155 | \(apply FUN-NAME ARGS). | |
6156 | ||
6157 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6158 | in the active region. BEG and END is the range affected by this entry | |
6159 | and DELTA is the number of bytes added or deleted in that range by | |
6160 | this change. | |
c6c7dc03 | 6161 | |
018ba359 PJ |
6162 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6163 | was adjusted in position by the offset DISTANCE (an integer). | |
6164 | ||
6165 | An entry of the form POSITION indicates that point was at the buffer | |
6166 | location given by the integer. Undoing an entry of this form places | |
6167 | point at POSITION. | |
6168 | ||
b4c4f2f4 JB |
6169 | Entries with value `nil' mark undo boundaries. The undo command treats |
6170 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6171 | |
6172 | If the value of the variable is t, undo information is not recorded. */); | |
6173 | ||
7ee72033 MB |
6174 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
6175 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 6176 | |
7ee72033 MB |
6177 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
6178 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
6179 | |
6180 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6181 | newlines. Columnar operations (like `move-to-column' and |
6182 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6183 | widths as they go. This works well for ordinary text, but if the |
6184 | buffer's lines are very long (say, more than 500 characters), these | |
6185 | motion functions will take longer to execute. Emacs may also take | |
6186 | longer to update the display. | |
6187 | ||
5629f29b | 6188 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6189 | results of their scans, and consult the cache to avoid rescanning |
6190 | regions of the buffer until the text is modified. The caches are most | |
6191 | beneficial when they prevent the most searching---that is, when the | |
6192 | buffer contains long lines and large regions of characters with the | |
6193 | same, fixed screen width. | |
6194 | ||
5629f29b | 6195 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6196 | become slightly slower (because of the overhead of consulting the |
6197 | cache), and the caches will use memory roughly proportional to the | |
6198 | number of newlines and characters whose screen width varies. | |
6199 | ||
6200 | The caches require no explicit maintenance; their accuracy is | |
6201 | maintained internally by the Emacs primitives. Enabling or disabling | |
6202 | the cache should not affect the behavior of any of the motion | |
6203 | functions; it should only affect their performance. */); | |
6204 | ||
7ee72033 MB |
6205 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
6206 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 6207 | |
7ee72033 MB |
6208 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
6209 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 6210 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6211 | set when a file is visited. */); |
be9aafdd | 6212 | |
71ed49fa LT |
6213 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
6214 | ¤t_buffer->auto_save_file_format, Qnil, | |
6215 | doc: /* *Format in which to write auto-save files. | |
6216 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6217 | If it is t, which is the default, auto-save files are written in the | |
6218 | same format as a regular save would use. */); | |
6219 | ||
3cb719bd | 6220 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6221 | ¤t_buffer->invisibility_spec, Qnil, |
6222 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6223 | The default is t, which means that text is invisible |
6224 | if it has a non-nil `invisible' property. | |
6225 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6226 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6227 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6228 | then characters with property value PROP are invisible, | |
6229 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6230 | |
7962a441 | 6231 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6232 | ¤t_buffer->display_count, Qnil, |
6233 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6234 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6235 | |
6236 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6237 | ¤t_buffer->display_time, Qnil, |
6238 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6239 | The function `set-window-buffer' updates this variable |
6240 | to the value obtained by calling `current-time'. | |
6241 | If the buffer has never been shown in a window, the value is nil. */); | |
6242 | ||
7ee72033 | 6243 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
526c9df9 | 6244 | doc: /* */); |
c48f61ef | 6245 | Vtransient_mark_mode = Qnil; |
526c9df9 CY |
6246 | /* The docstring is in simple.el. If we put it here, it would be |
6247 | overwritten when transient-mark-mode is defined using | |
6248 | define-minor-mode. */ | |
c48f61ef | 6249 | |
7ee72033 MB |
6250 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6251 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6252 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6253 | text properties. If the value is a list, disregard `buffer-read-only' | |
6254 | and disregard a `read-only' text property if the property value | |
6255 | is a member of the list. */); | |
a96b68f1 RS |
6256 | Vinhibit_read_only = Qnil; |
6257 | ||
7ee72033 | 6258 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6259 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6260 | Values are interpreted as follows: |
6261 | ||
b8dc613f JB |
6262 | t use the cursor specified for the frame |
6263 | nil don't display a cursor | |
6264 | box display a filled box cursor | |
6265 | hollow display a hollow box cursor | |
6266 | bar display a vertical bar cursor with default width | |
6267 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6268 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6269 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6270 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6271 | |
e08b1705 MR |
6272 | When the buffer is displayed in a non-selected window, the |
6273 | cursor's appearance is instead controlled by the variable | |
6274 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6275 | |
a3bbced0 | 6276 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6277 | ¤t_buffer->extra_line_spacing, Qnil, |
6278 | doc: /* Additional space to put between lines when displaying a buffer. | |
3ba010e5 EZ |
6279 | The space is measured in pixels, and put below lines on graphic displays, |
6280 | see `display-graphic-p'. | |
60ebfdf3 | 6281 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6282 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6283 | |
0124c5bd | 6284 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6285 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6286 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6287 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6288 | |
7ee72033 | 6289 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6290 | doc: /* List of functions called with no args to query before killing a buffer. |
6291 | The buffer being killed will be current while the functions are running. | |
6292 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6293 | Vkill_buffer_query_functions = Qnil; |
6294 | ||
43ed3b8d CY |
6295 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6296 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6297 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6298 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6299 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6300 | staticpro (&Qchange_major_mode_hook); |
6301 | ||
0dc88e60 | 6302 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6303 | defsubr (&Sbuffer_list); |
6304 | defsubr (&Sget_buffer); | |
6305 | defsubr (&Sget_file_buffer); | |
6306 | defsubr (&Sget_buffer_create); | |
336cd056 | 6307 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6308 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6309 | defsubr (&Sbuffer_name); |
6310 | /*defsubr (&Sbuffer_number);*/ | |
6311 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6312 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6313 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6314 | defsubr (&Sbuffer_local_variables); |
6315 | defsubr (&Sbuffer_modified_p); | |
6316 | defsubr (&Sset_buffer_modified_p); | |
6317 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6318 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6319 | defsubr (&Srename_buffer); |
6320 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6321 | defsubr (&Sbuffer_enable_undo); |
6322 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6323 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6324 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6325 | defsubr (&Scurrent_buffer); |
6326 | defsubr (&Sset_buffer); | |
6327 | defsubr (&Sbarf_if_buffer_read_only); | |
6328 | defsubr (&Sbury_buffer); | |
3ac81adb | 6329 | defsubr (&Serase_buffer); |
13cda5f9 | 6330 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6331 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6332 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6333 | |
52f8ec73 | 6334 | defsubr (&Soverlayp); |
2eec3b4e RS |
6335 | defsubr (&Smake_overlay); |
6336 | defsubr (&Sdelete_overlay); | |
6337 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6338 | defsubr (&Soverlay_start); |
6339 | defsubr (&Soverlay_end); | |
6340 | defsubr (&Soverlay_buffer); | |
6341 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6342 | defsubr (&Soverlays_at); |
74514898 | 6343 | defsubr (&Soverlays_in); |
2eec3b4e | 6344 | defsubr (&Snext_overlay_change); |
239c932b | 6345 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6346 | defsubr (&Soverlay_recenter); |
6347 | defsubr (&Soverlay_lists); | |
6348 | defsubr (&Soverlay_get); | |
6349 | defsubr (&Soverlay_put); | |
a8c21b48 | 6350 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6351 | } |
6352 | ||
dfcf069d | 6353 | void |
1ab256cb RM |
6354 | keys_of_buffer () |
6355 | { | |
6356 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6357 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6358 | |
6359 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6360 | initialized when that function gets called. */ | |
d67b4f80 | 6361 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6362 | } |
6b61353c KH |
6363 | |
6364 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6365 | (do not change this comment) */ |