Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
d4f8198b | 2 | Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 02, 03, 2004 |
c922bc55 | 3 | Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
c922bc55 | 9 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
1ab256cb | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 23 | |
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
9dde47f5 | 29 | |
2538fae4 | 30 | #ifndef USE_CRT_DLL |
9dde47f5 | 31 | extern int errno; |
2538fae4 | 32 | #endif |
1ab256cb RM |
33 | |
34 | #ifndef MAXPATHLEN | |
c2d5b10f | 35 | /* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */ |
1ab256cb RM |
36 | #define MAXPATHLEN 1024 |
37 | #endif /* not MAXPATHLEN */ | |
38 | ||
dfcf069d AS |
39 | #ifdef HAVE_UNISTD_H |
40 | #include <unistd.h> | |
41 | #endif | |
7ee72033 | 42 | |
1ab256cb | 43 | #include "lisp.h" |
21cf4cf8 | 44 | #include "intervals.h" |
1ab256cb RM |
45 | #include "window.h" |
46 | #include "commands.h" | |
47 | #include "buffer.h" | |
3b06f880 | 48 | #include "charset.h" |
28e969dd | 49 | #include "region-cache.h" |
1ab256cb | 50 | #include "indent.h" |
d014bf88 | 51 | #include "blockinput.h" |
2538fae4 | 52 | #include "keyboard.h" |
e35f6ff7 | 53 | #include "keymap.h" |
08460cd4 | 54 | #include "frame.h" |
1ab256cb RM |
55 | |
56 | struct buffer *current_buffer; /* the current buffer */ | |
57 | ||
58 | /* First buffer in chain of all buffers (in reverse order of creation). | |
59 | Threaded through ->next. */ | |
60 | ||
61 | struct buffer *all_buffers; | |
62 | ||
63 | /* This structure holds the default values of the buffer-local variables | |
64 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
65 | The default value occupies the same slot in this structure | |
66 | as an individual buffer's value occupies in that buffer. | |
67 | Setting the default value also goes through the alist of buffers | |
68 | and stores into each buffer that does not say it has a local value. */ | |
69 | ||
d4f8198b | 70 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
71 | |
72 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
73 | ||
74 | static Lisp_Object Vbuffer_defaults; | |
75 | ||
76 | /* This structure marks which slots in a buffer have corresponding | |
77 | default values in buffer_defaults. | |
78 | Each such slot has a nonzero value in this structure. | |
79 | The value has only one nonzero bit. | |
80 | ||
81 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
82 | the entry for that slot (found in the same slot in this structure) |
83 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
84 | |
85 | If a slot in this structure is -1, then even though there may | |
86 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
87 | and the corresponding slot in buffer_defaults is not used. | |
88 | ||
89 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
90 | but there is a default value which is copied into each buffer. | |
91 | ||
1ab256cb RM |
92 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
93 | zero, that is a bug */ | |
94 | ||
95 | struct buffer buffer_local_flags; | |
96 | ||
97 | /* This structure holds the names of symbols whose values may be | |
98 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
99 | ||
d4f8198b SM |
100 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
101 | ||
1ab256cb RM |
102 | /* A Lisp_Object pointer to the above, used for staticpro */ |
103 | static Lisp_Object Vbuffer_local_symbols; | |
104 | ||
0fa3ba92 JB |
105 | /* This structure holds the required types for the values in the |
106 | buffer-local slots. If a slot contains Qnil, then the | |
107 | corresponding buffer slot may contain a value of any type. If a | |
108 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
109 | equal to that integer (except nil is always allowed). |
110 | When a tag does not match, the function | |
111 | buffer_slot_type_mismatch will signal an error. | |
112 | ||
113 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
114 | struct buffer buffer_local_types; |
115 | ||
13de9290 RS |
116 | /* Flags indicating which built-in buffer-local variables |
117 | are permanent locals. */ | |
7313acd0 | 118 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
119 | |
120 | /* Number of per-buffer variables used. */ | |
121 | ||
7313acd0 | 122 | int last_per_buffer_idx; |
13de9290 | 123 | |
1ab256cb | 124 | Lisp_Object Fset_buffer (); |
01050cb5 | 125 | void set_buffer_internal (); |
c7aa5005 | 126 | void set_buffer_internal_1 (); |
173f2a64 | 127 | static void call_overlay_mod_hooks (); |
2f3f993b | 128 | static void swap_out_buffer_local_variables (); |
13de9290 | 129 | static void reset_buffer_local_variables (); |
1ab256cb RM |
130 | |
131 | /* Alist of all buffer names vs the buffers. */ | |
132 | /* This used to be a variable, but is no longer, | |
133 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
134 | Lisp_Object Vbuffer_alist; | |
135 | ||
136 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
137 | Lisp_Object Vbefore_change_functions; |
138 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 139 | |
c48f61ef RS |
140 | Lisp_Object Vtransient_mark_mode; |
141 | ||
a96b68f1 RS |
142 | /* t means ignore all read-only text properties. |
143 | A list means ignore such a property if its value is a member of the list. | |
144 | Any non-nil value means ignore buffer-read-only. */ | |
145 | Lisp_Object Vinhibit_read_only; | |
146 | ||
dcdffbf6 RS |
147 | /* List of functions to call that can query about killing a buffer. |
148 | If any of these functions returns nil, we don't kill it. */ | |
149 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 150 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 151 | |
dbc4e1c1 JB |
152 | /* List of functions to call before changing an unmodified buffer. */ |
153 | Lisp_Object Vfirst_change_hook; | |
22378665 | 154 | |
dbc4e1c1 | 155 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
156 | Lisp_Object Qbefore_change_functions; |
157 | Lisp_Object Qafter_change_functions; | |
48265e61 | 158 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 159 | |
7775635d KH |
160 | /* If nonzero, all modification hooks are suppressed. */ |
161 | int inhibit_modification_hooks; | |
162 | ||
1ab256cb RM |
163 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
164 | ||
165 | Lisp_Object Qprotected_field; | |
166 | ||
167 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
168 | ||
169 | Lisp_Object Qkill_buffer_hook; | |
170 | ||
5fe0b67e RS |
171 | Lisp_Object Qget_file_buffer; |
172 | ||
52f8ec73 JB |
173 | Lisp_Object Qoverlayp; |
174 | ||
bbbe9545 | 175 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 176 | |
294d215f RS |
177 | Lisp_Object Qmodification_hooks; |
178 | Lisp_Object Qinsert_in_front_hooks; | |
179 | Lisp_Object Qinsert_behind_hooks; | |
180 | ||
b86af064 GM |
181 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
182 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 183 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 184 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
b86af064 GM |
185 | |
186 | ||
1ab256cb RM |
187 | /* For debugging; temporary. See set_buffer_internal. */ |
188 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
189 | ||
01136e9b | 190 | void |
1ab256cb RM |
191 | nsberror (spec) |
192 | Lisp_Object spec; | |
193 | { | |
a7a60ce9 | 194 | if (STRINGP (spec)) |
d5db4077 | 195 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
196 | error ("Invalid buffer argument"); |
197 | } | |
198 | \f | |
0dc88e60 | 199 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
200 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
201 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
202 | (object) | |
0dc88e60 RS |
203 | Lisp_Object object; |
204 | { | |
205 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
206 | ? Qt : Qnil); | |
207 | } | |
208 | ||
08460cd4 | 209 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 210 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
211 | If the optional arg FRAME is a frame, we return the buffer list |
212 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
213 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 214 | (frame) |
08460cd4 | 215 | Lisp_Object frame; |
1ab256cb | 216 | { |
08460cd4 RS |
217 | Lisp_Object framelist, general; |
218 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
219 | ||
220 | if (FRAMEP (frame)) | |
221 | { | |
222 | Lisp_Object tail; | |
223 | ||
b7826503 | 224 | CHECK_FRAME (frame); |
08460cd4 RS |
225 | |
226 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
227 | ||
228 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
229 | tail = framelist; | |
230 | while (! NILP (tail)) | |
231 | { | |
7539e11f KR |
232 | general = Fdelq (XCAR (tail), general); |
233 | tail = XCDR (tail); | |
08460cd4 RS |
234 | } |
235 | return nconc2 (framelist, general); | |
236 | } | |
237 | ||
238 | return general; | |
1ab256cb RM |
239 | } |
240 | ||
04ae1b48 RS |
241 | /* Like Fassoc, but use Fstring_equal to compare |
242 | (which ignores text properties), | |
243 | and don't ever QUIT. */ | |
244 | ||
245 | static Lisp_Object | |
246 | assoc_ignore_text_properties (key, list) | |
247 | register Lisp_Object key; | |
248 | Lisp_Object list; | |
249 | { | |
250 | register Lisp_Object tail; | |
6d70a280 | 251 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
252 | { |
253 | register Lisp_Object elt, tem; | |
6d70a280 | 254 | elt = XCAR (tail); |
04ae1b48 RS |
255 | tem = Fstring_equal (Fcar (elt), key); |
256 | if (!NILP (tem)) | |
257 | return elt; | |
258 | } | |
259 | return Qnil; | |
260 | } | |
261 | ||
1ab256cb | 262 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 263 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 264 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
265 | NAME may also be a buffer; if so, the value is that buffer. */) |
266 | (name) | |
1ab256cb RM |
267 | register Lisp_Object name; |
268 | { | |
a7a60ce9 | 269 | if (BUFFERP (name)) |
1ab256cb | 270 | return name; |
b7826503 | 271 | CHECK_STRING (name); |
1ab256cb | 272 | |
04ae1b48 | 273 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
274 | } |
275 | ||
276 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 277 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
278 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
279 | If there is no such live buffer, return nil. | |
7ee72033 MB |
280 | See also `find-buffer-visiting'. */) |
281 | (filename) | |
1ab256cb RM |
282 | register Lisp_Object filename; |
283 | { | |
284 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
285 | Lisp_Object handler; |
286 | ||
b7826503 | 287 | CHECK_STRING (filename); |
1ab256cb RM |
288 | filename = Fexpand_file_name (filename, Qnil); |
289 | ||
5fe0b67e RS |
290 | /* If the file name has special constructs in it, |
291 | call the corresponding file handler. */ | |
a617e913 | 292 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
293 | if (!NILP (handler)) |
294 | return call2 (handler, Qget_file_buffer, filename); | |
295 | ||
7539e11f | 296 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 297 | { |
7539e11f | 298 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
299 | if (!BUFFERP (buf)) continue; |
300 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 301 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 302 | if (!NILP (tem)) |
1ab256cb RM |
303 | return buf; |
304 | } | |
305 | return Qnil; | |
306 | } | |
307 | ||
52e01189 RS |
308 | Lisp_Object |
309 | get_truename_buffer (filename) | |
310 | register Lisp_Object filename; | |
311 | { | |
312 | register Lisp_Object tail, buf, tem; | |
313 | ||
7539e11f | 314 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 315 | { |
7539e11f | 316 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
317 | if (!BUFFERP (buf)) continue; |
318 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
319 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
320 | if (!NILP (tem)) | |
321 | return buf; | |
322 | } | |
323 | return Qnil; | |
324 | } | |
325 | ||
1ab256cb RM |
326 | /* Incremented for each buffer created, to assign the buffer number. */ |
327 | int buffer_count; | |
328 | ||
329 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 330 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
331 | A new buffer is created if there is no live buffer named NAME. |
332 | If NAME starts with a space, the new buffer does not keep undo information. | |
333 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
334 | The value is never nil. */) |
335 | (name) | |
1ab256cb RM |
336 | register Lisp_Object name; |
337 | { | |
a9ee7a59 | 338 | register Lisp_Object buf; |
1ab256cb RM |
339 | register struct buffer *b; |
340 | ||
341 | buf = Fget_buffer (name); | |
265a9e55 | 342 | if (!NILP (buf)) |
1ab256cb RM |
343 | return buf; |
344 | ||
d5db4077 | 345 | if (SCHARS (name) == 0) |
31cd83e9 KH |
346 | error ("Empty string for buffer name is not allowed"); |
347 | ||
a21260d9 | 348 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 349 | |
336cd056 RS |
350 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
351 | ||
352 | /* An ordinary buffer uses its own struct buffer_text. */ | |
353 | b->text = &b->own_text; | |
354 | b->base_buffer = 0; | |
355 | ||
1ab256cb | 356 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 357 | BLOCK_INPUT; |
3b06f880 KH |
358 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
359 | anchoring a search. */ | |
b86af064 | 360 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 361 | UNBLOCK_INPUT; |
1ab256cb | 362 | if (! BUF_BEG_ADDR (b)) |
81841847 | 363 | buffer_memory_full (); |
1ab256cb | 364 | |
6d70a280 SM |
365 | BUF_PT (b) = BEG; |
366 | BUF_GPT (b) = BEG; | |
367 | BUF_BEGV (b) = BEG; | |
368 | BUF_ZV (b) = BEG; | |
369 | BUF_Z (b) = BEG; | |
370 | BUF_PT_BYTE (b) = BEG_BYTE; | |
371 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
372 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
373 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
374 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 375 | BUF_MODIFF (b) = 1; |
2509d356 | 376 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
377 | BUF_SAVE_MODIFF (b) = 1; |
378 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
379 | BUF_UNCHANGED_MODIFIED (b) = 1; |
380 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
381 | BUF_END_UNCHANGED (b) = 0; | |
382 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 383 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 384 | |
28e969dd JB |
385 | b->newline_cache = 0; |
386 | b->width_run_cache = 0; | |
387 | b->width_table = Qnil; | |
b5a225b4 | 388 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 389 | |
1ab256cb RM |
390 | /* Put this on the chain of all buffers including killed ones. */ |
391 | b->next = all_buffers; | |
392 | all_buffers = b; | |
393 | ||
336cd056 RS |
394 | /* An ordinary buffer normally doesn't need markers |
395 | to handle BEGV and ZV. */ | |
396 | b->pt_marker = Qnil; | |
397 | b->begv_marker = Qnil; | |
398 | b->zv_marker = Qnil; | |
04ae1b48 RS |
399 | |
400 | name = Fcopy_sequence (name); | |
ab77f05c | 401 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 402 | b->name = name; |
04ae1b48 | 403 | |
d5db4077 | 404 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
405 | b->undo_list = Qnil; |
406 | else | |
407 | b->undo_list = Qt; | |
408 | ||
409 | reset_buffer (b); | |
13de9290 | 410 | reset_buffer_local_variables (b, 1); |
1ab256cb | 411 | |
1f57cb74 | 412 | b->mark = Fmake_marker (); |
65745fad | 413 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
414 | b->name = name; |
415 | ||
1ab256cb | 416 | /* Put this in the alist of all live buffers. */ |
67180c6a | 417 | XSETBUFFER (buf, b); |
1ab256cb RM |
418 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
419 | ||
d36b182f DL |
420 | /* An error in calling the function here (should someone redfine it) |
421 | can lead to infinite regress until you run out of stack. rms | |
422 | says that's not worth protecting against. */ | |
48265e61 | 423 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 424 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
425 | call1 (Qucs_set_table_for_input, buf); |
426 | ||
336cd056 RS |
427 | return buf; |
428 | } | |
429 | ||
7e9d5818 | 430 | |
04e4cb3a GM |
431 | /* Return a list of overlays which is a copy of the overlay list |
432 | LIST, but for buffer B. */ | |
433 | ||
2410d73a | 434 | static struct Lisp_Overlay * |
04e4cb3a GM |
435 | copy_overlays (b, list) |
436 | struct buffer *b; | |
2410d73a | 437 | struct Lisp_Overlay *list; |
04e4cb3a | 438 | { |
2410d73a SM |
439 | Lisp_Object buffer; |
440 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
441 | |
442 | XSETBUFFER (buffer, b); | |
443 | ||
2410d73a | 444 | for (; list; list = list->next) |
04e4cb3a GM |
445 | { |
446 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 447 | EMACS_INT charpos; |
04e4cb3a | 448 | |
2410d73a | 449 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
450 | charpos = marker_position (OVERLAY_START (old_overlay)); |
451 | start = Fmake_marker (); | |
db3a49a6 | 452 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
453 | XMARKER (start)->insertion_type |
454 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
455 | ||
456 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
457 | end = Fmake_marker (); | |
db3a49a6 | 458 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
459 | XMARKER (end)->insertion_type |
460 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
461 | ||
462 | overlay = allocate_misc (); | |
463 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
464 | OVERLAY_START (overlay) = start; | |
465 | OVERLAY_END (overlay) = end; | |
466 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 467 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 468 | |
2410d73a SM |
469 | if (tail) |
470 | tail = tail->next = XOVERLAY (overlay); | |
471 | else | |
472 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
473 | } |
474 | ||
2410d73a | 475 | return result; |
04e4cb3a | 476 | } |
177c0ea7 | 477 | |
04e4cb3a | 478 | |
7e9d5818 GM |
479 | /* Clone per-buffer values of buffer FROM. |
480 | ||
481 | Buffer TO gets the same per-buffer values as FROM, with the | |
482 | following exceptions: (1) TO's name is left untouched, (2) markers | |
483 | are copied and made to refer to TO, and (3) overlay lists are | |
484 | copied. */ | |
485 | ||
486 | static void | |
487 | clone_per_buffer_values (from, to) | |
488 | struct buffer *from, *to; | |
489 | { | |
02f28bbd | 490 | Lisp_Object to_buffer, tem; |
7e9d5818 GM |
491 | int offset; |
492 | ||
493 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 494 | |
7e9d5818 GM |
495 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); |
496 | offset < sizeof *to; | |
497 | offset += sizeof (Lisp_Object)) | |
498 | { | |
499 | Lisp_Object obj; | |
500 | ||
501 | obj = PER_BUFFER_VALUE (from, offset); | |
502 | if (MARKERP (obj)) | |
503 | { | |
504 | struct Lisp_Marker *m = XMARKER (obj); | |
505 | obj = Fmake_marker (); | |
506 | XMARKER (obj)->insertion_type = m->insertion_type; | |
507 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
508 | } | |
509 | ||
510 | PER_BUFFER_VALUE (to, offset) = obj; | |
511 | } | |
512 | ||
7e9d5818 | 513 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 514 | |
04e4cb3a GM |
515 | to->overlays_before = copy_overlays (to, from->overlays_before); |
516 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd RS |
517 | |
518 | /* Copy the alist of local variables, | |
519 | and all the alist elements too. */ | |
520 | to->local_var_alist | |
521 | = Fcopy_sequence (from->local_var_alist); | |
522 | for (tem = to->local_var_alist; CONSP (tem); | |
523 | tem = XCDR (tem)) | |
524 | XSETCAR (tem, Fcons (XCAR (XCAR (tem)), XCDR (XCAR (tem)))); | |
7e9d5818 GM |
525 | } |
526 | ||
527 | ||
528 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, | |
529 | 2, 3, | |
193c3837 | 530 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 531 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
c9aac8e6 | 532 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
533 | NAME should be a string which is not the name of an existing buffer. |
534 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
535 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
536 | CLONE nil means the indirect buffer's state is reset to default values. */) |
537 | (base_buffer, name, clone) | |
7e9d5818 | 538 | Lisp_Object base_buffer, name, clone; |
336cd056 | 539 | { |
c9aac8e6 | 540 | Lisp_Object buf, tem; |
7e9d5818 | 541 | struct buffer *b; |
336cd056 | 542 | |
ab53e065 | 543 | CHECK_STRING (name); |
336cd056 RS |
544 | buf = Fget_buffer (name); |
545 | if (!NILP (buf)) | |
d5db4077 | 546 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 547 | |
c9aac8e6 | 548 | tem = base_buffer; |
336cd056 RS |
549 | base_buffer = Fget_buffer (base_buffer); |
550 | if (NILP (base_buffer)) | |
c9aac8e6 LT |
551 | error ("No such buffer: `%s'", SDATA (tem)); |
552 | if (NILP (XBUFFER (base_buffer)->name)) | |
553 | error ("Base buffer has been killed"); | |
336cd056 | 554 | |
d5db4077 | 555 | if (SCHARS (name) == 0) |
336cd056 RS |
556 | error ("Empty string for buffer name is not allowed"); |
557 | ||
a21260d9 | 558 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
559 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
560 | ||
561 | if (XBUFFER (base_buffer)->base_buffer) | |
562 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
563 | else | |
564 | b->base_buffer = XBUFFER (base_buffer); | |
565 | ||
566 | /* Use the base buffer's text object. */ | |
567 | b->text = b->base_buffer->text; | |
568 | ||
569 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
570 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
571 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
572 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
573 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
574 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
575 | |
576 | b->newline_cache = 0; | |
577 | b->width_run_cache = 0; | |
578 | b->width_table = Qnil; | |
579 | ||
580 | /* Put this on the chain of all buffers including killed ones. */ | |
581 | b->next = all_buffers; | |
582 | all_buffers = b; | |
583 | ||
584 | name = Fcopy_sequence (name); | |
ab77f05c | 585 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
586 | b->name = name; |
587 | ||
588 | reset_buffer (b); | |
13de9290 | 589 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
590 | |
591 | /* Put this in the alist of all live buffers. */ | |
592 | XSETBUFFER (buf, b); | |
593 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
594 | ||
595 | b->mark = Fmake_marker (); | |
1ab256cb | 596 | b->name = name; |
336cd056 | 597 | |
abc9d959 RS |
598 | /* The multibyte status belongs to the base buffer. */ |
599 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
600 | ||
336cd056 RS |
601 | /* Make sure the base buffer has markers for its narrowing. */ |
602 | if (NILP (b->base_buffer->pt_marker)) | |
603 | { | |
604 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
605 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
606 | BUF_PT (b->base_buffer), | |
607 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
608 | } |
609 | if (NILP (b->base_buffer->begv_marker)) | |
610 | { | |
611 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
612 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
613 | BUF_BEGV (b->base_buffer), | |
614 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
615 | } |
616 | if (NILP (b->base_buffer->zv_marker)) | |
617 | { | |
618 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
619 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
620 | BUF_ZV (b->base_buffer), | |
621 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 622 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
623 | } |
624 | ||
7e9d5818 GM |
625 | if (NILP (clone)) |
626 | { | |
627 | /* Give the indirect buffer markers for its narrowing. */ | |
628 | b->pt_marker = Fmake_marker (); | |
629 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
630 | b->begv_marker = Fmake_marker (); | |
631 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
632 | b->zv_marker = Fmake_marker (); | |
633 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
634 | XMARKER (b->zv_marker)->insertion_type = 1; | |
635 | } | |
636 | else | |
637 | clone_per_buffer_values (b->base_buffer, b); | |
336cd056 | 638 | |
a9ee7a59 | 639 | return buf; |
1ab256cb RM |
640 | } |
641 | ||
d4f5719a SM |
642 | void |
643 | delete_all_overlays (b) | |
644 | struct buffer *b; | |
645 | { | |
646 | Lisp_Object overlay; | |
647 | ||
648 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
649 | have to empty the list, otherwise we end up with overlays that | |
650 | think they belong to this buffer while the buffer doesn't know about | |
651 | them any more. */ | |
652 | while (b->overlays_before) | |
653 | { | |
654 | XSETMISC (overlay, b->overlays_before); | |
655 | Fdelete_overlay (overlay); | |
656 | } | |
657 | while (b->overlays_after) | |
658 | { | |
659 | XSETMISC (overlay, b->overlays_after); | |
660 | Fdelete_overlay (overlay); | |
661 | } | |
662 | eassert (b->overlays_before == NULL); | |
663 | eassert (b->overlays_after == NULL); | |
664 | } | |
665 | ||
bcd40520 | 666 | /* Reinitialize everything about a buffer except its name and contents |
c9aac8e6 | 667 | and local variables. |
d4f5719a SM |
668 | If called on an already-initialized buffer, the list of overlays |
669 | should be deleted before calling this function, otherwise we end up | |
670 | with overlays that claim to belong to the buffer but the buffer | |
671 | claims it doesn't belong to it. */ | |
1ab256cb RM |
672 | |
673 | void | |
674 | reset_buffer (b) | |
675 | register struct buffer *b; | |
676 | { | |
677 | b->filename = Qnil; | |
f6ed2e84 | 678 | b->file_truename = Qnil; |
1ab256cb RM |
679 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
680 | b->modtime = 0; | |
8d7a4592 | 681 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 682 | b->last_window_start = 1; |
8b264726 | 683 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
684 | b->clip_changed = 0; |
685 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
686 | b->backed_up = Qnil; |
687 | b->auto_save_modified = 0; | |
84f6bcba | 688 | b->auto_save_failure_time = -1; |
1ab256cb RM |
689 | b->auto_save_file_name = Qnil; |
690 | b->read_only = Qnil; | |
2410d73a SM |
691 | b->overlays_before = NULL; |
692 | b->overlays_after = NULL; | |
c2d5b10f | 693 | b->overlay_center = BEG; |
dfda7a7f | 694 | b->mark_active = Qnil; |
943e065b | 695 | b->point_before_scroll = Qnil; |
be9aafdd | 696 | b->file_format = Qnil; |
71ed49fa | 697 | b->auto_save_file_format = Qt; |
0dc6f165 | 698 | b->last_selected_window = Qnil; |
7962a441 | 699 | XSETINT (b->display_count, 0); |
3fd364db | 700 | b->display_time = Qnil; |
1bf08baf | 701 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 702 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 703 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
704 | |
705 | b->display_error_modiff = 0; | |
1ab256cb RM |
706 | } |
707 | ||
bcd40520 RS |
708 | /* Reset buffer B's local variables info. |
709 | Don't use this on a buffer that has already been in use; | |
710 | it does not treat permanent locals consistently. | |
13de9290 RS |
711 | Instead, use Fkill_all_local_variables. |
712 | ||
713 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
714 | buffer-local variables. If PERMANENT_TOO is 0, | |
715 | we preserve those. */ | |
bcd40520 | 716 | |
13de9290 RS |
717 | static void |
718 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 719 | register struct buffer *b; |
13de9290 | 720 | int permanent_too; |
1ab256cb RM |
721 | { |
722 | register int offset; | |
7c02e886 | 723 | int i; |
1ab256cb RM |
724 | |
725 | /* Reset the major mode to Fundamental, together with all the | |
726 | things that depend on the major mode. | |
727 | default-major-mode is handled at a higher level. | |
728 | We ignore it here. */ | |
729 | b->major_mode = Qfundamental_mode; | |
730 | b->keymap = Qnil; | |
1ab256cb RM |
731 | b->mode_name = QSFundamental; |
732 | b->minor_modes = Qnil; | |
3446af9c RS |
733 | |
734 | /* If the standard case table has been altered and invalidated, | |
735 | fix up its insides first. */ | |
736 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
737 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
738 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
739 | Fset_standard_case_table (Vascii_downcase_table); | |
740 | ||
1ab256cb | 741 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
742 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
743 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
744 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 745 | b->invisibility_spec = Qt; |
2e716096 RS |
746 | #ifndef DOS_NT |
747 | b->buffer_file_type = Qnil; | |
748 | #endif | |
3cb719bd | 749 | |
13de9290 | 750 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 751 | b->local_var_alist = Qnil; |
7313acd0 | 752 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 753 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 754 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
755 | |
756 | /* For each slot that has a default value, | |
757 | copy that into the slot. */ | |
758 | ||
7313acd0 | 759 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
760 | offset < sizeof *b; |
761 | offset += sizeof (Lisp_Object)) | |
aab80822 | 762 | { |
7313acd0 | 763 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
764 | if ((idx > 0 |
765 | && (permanent_too | |
766 | || buffer_permanent_local_flags[idx] == 0)) | |
767 | /* Is -2 used anywhere? */ | |
768 | || idx == -2) | |
7313acd0 | 769 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 770 | } |
1ab256cb RM |
771 | } |
772 | ||
01050cb5 RM |
773 | /* We split this away from generate-new-buffer, because rename-buffer |
774 | and set-visited-file-name ought to be able to use this to really | |
775 | rename the buffer properly. */ | |
776 | ||
777 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 778 | 1, 2, 0, |
7ee72033 | 779 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
780 | If there is no live buffer named NAME, then return NAME. |
781 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
54dffe35 | 782 | \(starting at 2) until an unused name is found, and then return that name. |
018ba359 PJ |
783 | Optional second argument IGNORE specifies a name that is okay to use |
784 | \(if it is in the sequence to be tried) | |
7ee72033 MB |
785 | even if a buffer with that name exists. */) |
786 | (name, ignore) | |
c273e647 | 787 | register Lisp_Object name, ignore; |
1ab256cb RM |
788 | { |
789 | register Lisp_Object gentemp, tem; | |
790 | int count; | |
791 | char number[10]; | |
792 | ||
b7826503 | 793 | CHECK_STRING (name); |
1ab256cb | 794 | |
54dffe35 LT |
795 | tem = Fstring_equal (name, ignore); |
796 | if (!NILP (tem)) | |
797 | return name; | |
1ab256cb | 798 | tem = Fget_buffer (name); |
265a9e55 | 799 | if (NILP (tem)) |
01050cb5 | 800 | return name; |
1ab256cb RM |
801 | |
802 | count = 1; | |
803 | while (1) | |
804 | { | |
805 | sprintf (number, "<%d>", ++count); | |
806 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 807 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
808 | if (!NILP (tem)) |
809 | return gentemp; | |
1ab256cb | 810 | tem = Fget_buffer (gentemp); |
265a9e55 | 811 | if (NILP (tem)) |
01050cb5 | 812 | return gentemp; |
1ab256cb RM |
813 | } |
814 | } | |
815 | ||
816 | \f | |
817 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
818 | doc: /* Return the name of BUFFER, as a string. |
819 | With no argument or nil as argument, return the name of the current buffer. */) | |
820 | (buffer) | |
1ab256cb RM |
821 | register Lisp_Object buffer; |
822 | { | |
265a9e55 | 823 | if (NILP (buffer)) |
1ab256cb | 824 | return current_buffer->name; |
b7826503 | 825 | CHECK_BUFFER (buffer); |
1ab256cb RM |
826 | return XBUFFER (buffer)->name; |
827 | } | |
828 | ||
829 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
830 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
831 | No argument or nil as argument means use the current buffer. */) | |
832 | (buffer) | |
1ab256cb RM |
833 | register Lisp_Object buffer; |
834 | { | |
265a9e55 | 835 | if (NILP (buffer)) |
1ab256cb | 836 | return current_buffer->filename; |
b7826503 | 837 | CHECK_BUFFER (buffer); |
1ab256cb RM |
838 | return XBUFFER (buffer)->filename; |
839 | } | |
840 | ||
336cd056 RS |
841 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
842 | 0, 1, 0, | |
7ee72033 | 843 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
844 | If BUFFER is not indirect, return nil. |
845 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 846 | (buffer) |
336cd056 RS |
847 | register Lisp_Object buffer; |
848 | { | |
849 | struct buffer *base; | |
850 | Lisp_Object base_buffer; | |
851 | ||
852 | if (NILP (buffer)) | |
853 | base = current_buffer->base_buffer; | |
854 | else | |
855 | { | |
b7826503 | 856 | CHECK_BUFFER (buffer); |
336cd056 RS |
857 | base = XBUFFER (buffer)->base_buffer; |
858 | } | |
859 | ||
860 | if (! base) | |
861 | return Qnil; | |
862 | XSETBUFFER (base_buffer, base); | |
863 | return base_buffer; | |
864 | } | |
865 | ||
79aa712d | 866 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 867 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
868 | doc: /* Return the value of VARIABLE in BUFFER. |
869 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
870 | is the default binding of variable. */) | |
871 | (symbol, buffer) | |
872 | register Lisp_Object symbol; | |
873 | register Lisp_Object buffer; | |
874 | { | |
875 | register struct buffer *buf; | |
876 | register Lisp_Object result; | |
877 | ||
ae69175b RS |
878 | CHECK_SYMBOL (symbol); |
879 | CHECK_BUFFER (buffer); | |
79aa712d RS |
880 | buf = XBUFFER (buffer); |
881 | ||
882 | /* Look in local_var_list */ | |
883 | result = Fassoc (symbol, buf->local_var_alist); | |
177c0ea7 | 884 | if (NILP (result)) |
79aa712d RS |
885 | { |
886 | int offset, idx; | |
887 | int found = 0; | |
888 | ||
889 | /* Look in special slots */ | |
890 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
891 | offset < sizeof (struct buffer); | |
892 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
893 | offset += (sizeof (EMACS_INT))) | |
894 | { | |
895 | idx = PER_BUFFER_IDX (offset); | |
896 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 JB |
897 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
898 | && EQ (PER_BUFFER_SYMBOL (offset), symbol)) | |
79aa712d RS |
899 | { |
900 | result = PER_BUFFER_VALUE (buf, offset); | |
901 | found = 1; | |
902 | break; | |
903 | } | |
904 | } | |
905 | ||
906 | if (!found) | |
907 | result = Fdefault_value (symbol); | |
908 | } | |
909 | else | |
f0bac7de RS |
910 | { |
911 | Lisp_Object valcontents; | |
912 | Lisp_Object current_alist_element; | |
913 | ||
914 | /* What binding is loaded right now? */ | |
915 | valcontents = SYMBOL_VALUE (symbol); | |
916 | current_alist_element | |
917 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
918 | ||
919 | /* The value of the currently loaded binding is not | |
920 | stored in it, but rather in the realvalue slot. | |
921 | Store that value into the binding it belongs to | |
922 | in case that is the one we are about to use. */ | |
923 | ||
924 | Fsetcdr (current_alist_element, | |
925 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
926 | ||
927 | /* Now get the (perhaps updated) value out of the binding. */ | |
928 | result = XCDR (result); | |
929 | } | |
79aa712d RS |
930 | |
931 | if (EQ (result, Qunbound)) | |
932 | return Fsignal (Qvoid_variable, Fcons (symbol, Qnil)); | |
933 | ||
934 | return result; | |
935 | } | |
936 | ||
1ab256cb | 937 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 938 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 939 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
940 | Most elements look like (SYMBOL . VALUE), describing one variable. |
941 | For a symbol that is locally unbound, just the symbol appears in the value. | |
942 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
943 | No argument or nil as argument means use current buffer as BUFFER. */) |
944 | (buffer) | |
1ab256cb RM |
945 | register Lisp_Object buffer; |
946 | { | |
947 | register struct buffer *buf; | |
553defa4 | 948 | register Lisp_Object result; |
1ab256cb | 949 | |
265a9e55 | 950 | if (NILP (buffer)) |
1ab256cb RM |
951 | buf = current_buffer; |
952 | else | |
953 | { | |
b7826503 | 954 | CHECK_BUFFER (buffer); |
1ab256cb RM |
955 | buf = XBUFFER (buffer); |
956 | } | |
957 | ||
553defa4 RS |
958 | result = Qnil; |
959 | ||
1ab256cb | 960 | { |
553defa4 | 961 | register Lisp_Object tail; |
7539e11f | 962 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 963 | { |
553defa4 RS |
964 | Lisp_Object val, elt; |
965 | ||
7539e11f | 966 | elt = XCAR (tail); |
553defa4 | 967 | |
e0585c64 RS |
968 | /* Reference each variable in the alist in buf. |
969 | If inquiring about the current buffer, this gets the current values, | |
970 | so store them into the alist so the alist is up to date. | |
971 | If inquiring about some other buffer, this swaps out any values | |
972 | for that buffer, making the alist up to date automatically. */ | |
7539e11f | 973 | val = find_symbol_value (XCAR (elt)); |
e0585c64 RS |
974 | /* Use the current buffer value only if buf is the current buffer. */ |
975 | if (buf != current_buffer) | |
7539e11f | 976 | val = XCDR (elt); |
553defa4 RS |
977 | |
978 | /* If symbol is unbound, put just the symbol in the list. */ | |
979 | if (EQ (val, Qunbound)) | |
7539e11f | 980 | result = Fcons (XCAR (elt), result); |
553defa4 RS |
981 | /* Otherwise, put (symbol . value) in the list. */ |
982 | else | |
7539e11f | 983 | result = Fcons (Fcons (XCAR (elt), val), result); |
1ab256cb RM |
984 | } |
985 | } | |
986 | ||
1ab256cb RM |
987 | /* Add on all the variables stored in special slots. */ |
988 | { | |
7c02e886 | 989 | int offset, idx; |
1ab256cb | 990 | |
7313acd0 | 991 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 992 | offset < sizeof (struct buffer); |
7c02e886 GM |
993 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
994 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 995 | { |
7313acd0 GM |
996 | idx = PER_BUFFER_IDX (offset); |
997 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
998 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
999 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1000 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1001 | result); |
1ab256cb RM |
1002 | } |
1003 | } | |
553defa4 RS |
1004 | |
1005 | return result; | |
1ab256cb RM |
1006 | } |
1007 | ||
1008 | \f | |
1009 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1010 | 0, 1, 0, |
7ee72033 MB |
1011 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1012 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1013 | (buffer) | |
1ab256cb RM |
1014 | register Lisp_Object buffer; |
1015 | { | |
1016 | register struct buffer *buf; | |
265a9e55 | 1017 | if (NILP (buffer)) |
1ab256cb RM |
1018 | buf = current_buffer; |
1019 | else | |
1020 | { | |
b7826503 | 1021 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1022 | buf = XBUFFER (buffer); |
1023 | } | |
1024 | ||
336cd056 | 1025 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1026 | } |
1027 | ||
1028 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1029 | 1, 1, 0, |
7ee72033 MB |
1030 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1031 | A non-nil FLAG means mark the buffer modified. */) | |
1032 | (flag) | |
1ab256cb RM |
1033 | register Lisp_Object flag; |
1034 | { | |
1035 | register int already; | |
1036 | register Lisp_Object fn; | |
8ec01c70 | 1037 | Lisp_Object buffer, window; |
1ab256cb RM |
1038 | |
1039 | #ifdef CLASH_DETECTION | |
1040 | /* If buffer becoming modified, lock the file. | |
1041 | If buffer becoming unmodified, unlock the file. */ | |
1042 | ||
60f4dd23 | 1043 | fn = current_buffer->file_truename; |
90d456d2 KH |
1044 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1045 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1046 | { |
336cd056 | 1047 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1048 | if (!already && !NILP (flag)) |
1ab256cb | 1049 | lock_file (fn); |
265a9e55 | 1050 | else if (already && NILP (flag)) |
1ab256cb RM |
1051 | unlock_file (fn); |
1052 | } | |
1053 | #endif /* CLASH_DETECTION */ | |
1054 | ||
336cd056 | 1055 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1056 | |
8ec01c70 GM |
1057 | /* Set update_mode_lines only if buffer is displayed in some window. |
1058 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1059 | state by recording/restoring the state around blocks of code. | |
1060 | Setting update_mode_lines makes redisplay consider all windows | |
1061 | (on all frames). Stealth fontification of buffers not displayed | |
1062 | would incur additional redisplay costs if we'd set | |
1063 | update_modes_lines unconditionally. | |
1064 | ||
1065 | Ideally, I think there should be another mechanism for fontifying | |
1066 | buffers without "modifying" buffers, or redisplay should be | |
1067 | smarter about updating the `*' in mode lines. --gerd */ | |
1068 | XSETBUFFER (buffer, current_buffer); | |
1069 | window = Fget_buffer_window (buffer, Qt); | |
1070 | if (WINDOWP (window)) | |
d57b83b3 GM |
1071 | { |
1072 | ++update_mode_lines; | |
1073 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1074 | } | |
177c0ea7 | 1075 | |
1ab256cb RM |
1076 | return flag; |
1077 | } | |
1078 | ||
a8c21b48 GM |
1079 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1080 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1081 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1082 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1083 | state of the current buffer. Use with care. */) |
1084 | (flag) | |
a8c21b48 GM |
1085 | Lisp_Object flag; |
1086 | { | |
1087 | #ifdef CLASH_DETECTION | |
1088 | Lisp_Object fn; | |
177c0ea7 | 1089 | |
a8c21b48 GM |
1090 | /* If buffer becoming modified, lock the file. |
1091 | If buffer becoming unmodified, unlock the file. */ | |
1092 | ||
1093 | fn = current_buffer->file_truename; | |
1094 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1095 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1096 | { | |
1097 | int already = SAVE_MODIFF < MODIFF; | |
1098 | if (!already && !NILP (flag)) | |
1099 | lock_file (fn); | |
1100 | else if (already && NILP (flag)) | |
1101 | unlock_file (fn); | |
1102 | } | |
1103 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1104 | |
a8c21b48 GM |
1105 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1106 | return flag; | |
1107 | } | |
1108 | ||
1ab256cb | 1109 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1110 | 0, 1, 0, |
7ee72033 | 1111 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
018ba359 PJ |
1112 | Each buffer has a tick counter which is incremented each time the text in |
1113 | that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1114 | No argument or nil as argument means use current buffer as BUFFER. */) |
1115 | (buffer) | |
1ab256cb RM |
1116 | register Lisp_Object buffer; |
1117 | { | |
1118 | register struct buffer *buf; | |
265a9e55 | 1119 | if (NILP (buffer)) |
1ab256cb RM |
1120 | buf = current_buffer; |
1121 | else | |
1122 | { | |
b7826503 | 1123 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1124 | buf = XBUFFER (buffer); |
1125 | } | |
1126 | ||
1127 | return make_number (BUF_MODIFF (buf)); | |
1128 | } | |
1129 | \f | |
01050cb5 | 1130 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1131 | "sRename buffer (to new name): \nP", |
7ee72033 | 1132 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1133 | If second arg UNIQUE is nil or omitted, it is an error if a |
1134 | buffer named NEWNAME already exists. | |
1135 | If UNIQUE is non-nil, come up with a new name using | |
1136 | `generate-new-buffer-name'. | |
1137 | Interactively, you can set UNIQUE with a prefix argument. | |
1138 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1139 | This does not change the name of the visited file (if any). */) |
1140 | (newname, unique) | |
489c043a | 1141 | register Lisp_Object newname, unique; |
1ab256cb RM |
1142 | { |
1143 | register Lisp_Object tem, buf; | |
1144 | ||
b7826503 | 1145 | CHECK_STRING (newname); |
d59698c4 | 1146 | |
d5db4077 | 1147 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1148 | error ("Empty string is invalid as a buffer name"); |
1149 | ||
489c043a | 1150 | tem = Fget_buffer (newname); |
265a9e55 | 1151 | if (!NILP (tem)) |
01050cb5 | 1152 | { |
8801a864 KR |
1153 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1154 | rename the buffer automatically so you can create another | |
1155 | with the original name. It makes UNIQUE equivalent to | |
1156 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1157 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1158 | return current_buffer->name; | |
3bd779aa | 1159 | if (!NILP (unique)) |
489c043a | 1160 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1161 | else |
d5db4077 | 1162 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1163 | } |
1ab256cb | 1164 | |
489c043a | 1165 | current_buffer->name = newname; |
76f590d7 JB |
1166 | |
1167 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1168 | any windows displaying current_buffer will stay unchanged. */ | |
1169 | update_mode_lines++; | |
1170 | ||
67180c6a | 1171 | XSETBUFFER (buf, current_buffer); |
489c043a | 1172 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1173 | if (NILP (current_buffer->filename) |
1174 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1175 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1176 | /* Refetch since that last call may have done GC. */ |
1177 | return current_buffer->name; | |
1ab256cb RM |
1178 | } |
1179 | ||
773fbdb9 | 1180 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1181 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1182 | Buffers not visible in windows are preferred to visible buffers, |
1183 | unless optional second argument VISIBLE-OK is non-nil. | |
1184 | If the optional third argument FRAME is non-nil, use that frame's | |
1185 | buffer list instead of the selected frame's buffer list. | |
1186 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1187 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1188 | (buffer, visible_ok, frame) | |
773fbdb9 | 1189 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1190 | { |
89132f25 | 1191 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1192 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1193 | notsogood = Qnil; |
1194 | ||
773fbdb9 | 1195 | if (NILP (frame)) |
9ba9623d | 1196 | frame = selected_frame; |
773fbdb9 | 1197 | |
7962a441 | 1198 | tail = Vbuffer_alist; |
773fbdb9 | 1199 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1200 | |
1201 | /* Consider buffers that have been seen in the selected frame | |
1202 | before other buffers. */ | |
177c0ea7 | 1203 | |
773fbdb9 | 1204 | tem = frame_buffer_list (frame); |
7962a441 RS |
1205 | add_ons = Qnil; |
1206 | while (CONSP (tem)) | |
1207 | { | |
7539e11f KR |
1208 | if (BUFFERP (XCAR (tem))) |
1209 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1210 | tem = XCDR (tem); | |
7962a441 RS |
1211 | } |
1212 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1213 | ||
6d70a280 | 1214 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1215 | { |
6d70a280 | 1216 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1217 | if (EQ (buf, buffer)) |
1218 | continue; | |
d674d13e RS |
1219 | if (NILP (buf)) |
1220 | continue; | |
1221 | if (NILP (XBUFFER (buf)->name)) | |
1222 | continue; | |
10ceceb8 | 1223 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1224 | continue; |
04ae1b48 RS |
1225 | /* If the selected frame has a buffer_predicate, |
1226 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1227 | if (!NILP (pred)) |
04ae1b48 | 1228 | { |
7962a441 | 1229 | tem = call1 (pred, buf); |
04ae1b48 RS |
1230 | if (NILP (tem)) |
1231 | continue; | |
1232 | } | |
04ae1b48 | 1233 | |
a0ebb746 | 1234 | if (NILP (visible_ok)) |
66ffe51c | 1235 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1236 | else |
1237 | tem = Qnil; | |
265a9e55 | 1238 | if (NILP (tem)) |
1ab256cb | 1239 | return buf; |
265a9e55 | 1240 | if (NILP (notsogood)) |
1ab256cb RM |
1241 | notsogood = buf; |
1242 | } | |
265a9e55 | 1243 | if (!NILP (notsogood)) |
1ab256cb | 1244 | return notsogood; |
dba1a30a GM |
1245 | buf = Fget_buffer (build_string ("*scratch*")); |
1246 | if (NILP (buf)) | |
1247 | { | |
1248 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1249 | Fset_buffer_major_mode (buf); | |
1250 | } | |
89132f25 | 1251 | return buf; |
1ab256cb RM |
1252 | } |
1253 | \f | |
316784fb KH |
1254 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
1255 | 0, 1, "", | |
7ee72033 MB |
1256 | doc: /* Make BUFFER stop keeping undo information. |
1257 | No argument or nil as argument means do this for the current buffer. */) | |
1258 | (buffer) | |
ffd56f97 | 1259 | register Lisp_Object buffer; |
1ab256cb | 1260 | { |
ffd56f97 JB |
1261 | Lisp_Object real_buffer; |
1262 | ||
1263 | if (NILP (buffer)) | |
67180c6a | 1264 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
1265 | else |
1266 | { | |
1267 | real_buffer = Fget_buffer (buffer); | |
1268 | if (NILP (real_buffer)) | |
1269 | nsberror (buffer); | |
1270 | } | |
1271 | ||
1272 | XBUFFER (real_buffer)->undo_list = Qt; | |
1273 | ||
1ab256cb RM |
1274 | return Qnil; |
1275 | } | |
1276 | ||
1277 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
1278 | 0, 1, "", | |
7ee72033 MB |
1279 | doc: /* Start keeping undo information for buffer BUFFER. |
1280 | No argument or nil as argument means do this for the current buffer. */) | |
1281 | (buffer) | |
ffd56f97 | 1282 | register Lisp_Object buffer; |
1ab256cb | 1283 | { |
ffd56f97 | 1284 | Lisp_Object real_buffer; |
1ab256cb | 1285 | |
ffd56f97 | 1286 | if (NILP (buffer)) |
67180c6a | 1287 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1288 | else |
1289 | { | |
ffd56f97 JB |
1290 | real_buffer = Fget_buffer (buffer); |
1291 | if (NILP (real_buffer)) | |
1292 | nsberror (buffer); | |
1ab256cb RM |
1293 | } |
1294 | ||
ffd56f97 JB |
1295 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1296 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1297 | |
1298 | return Qnil; | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1303 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1304 | The buffer being killed will be current while the hook is running.\n\ | |
1305 | See `kill-buffer'." | |
1306 | */ | |
1307 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1308 | doc: /* Kill the buffer BUFFER. |
018ba359 PJ |
1309 | The argument may be a buffer or may be the name of a buffer. |
1310 | An argument of nil means kill the current buffer. | |
1311 | ||
1312 | Value is t if the buffer is actually killed, nil if user says no. | |
1313 | ||
1314 | The value of `kill-buffer-hook' (which may be local to that buffer), | |
1315 | if not void, is a list of functions to be called, with no arguments, | |
1316 | before the buffer is actually killed. The buffer to be killed is current | |
1317 | when the hook functions are called. | |
1318 | ||
1319 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1320 | with SIGHUP. */) |
1321 | (buffer) | |
a25f13ae | 1322 | Lisp_Object buffer; |
1ab256cb RM |
1323 | { |
1324 | Lisp_Object buf; | |
1325 | register struct buffer *b; | |
1326 | register Lisp_Object tem; | |
1327 | register struct Lisp_Marker *m; | |
6af718a4 | 1328 | struct gcpro gcpro1; |
1ab256cb | 1329 | |
a25f13ae | 1330 | if (NILP (buffer)) |
1ab256cb RM |
1331 | buf = Fcurrent_buffer (); |
1332 | else | |
a25f13ae | 1333 | buf = Fget_buffer (buffer); |
265a9e55 | 1334 | if (NILP (buf)) |
a25f13ae | 1335 | nsberror (buffer); |
1ab256cb RM |
1336 | |
1337 | b = XBUFFER (buf); | |
1338 | ||
4a4a9db5 KH |
1339 | /* Avoid trouble for buffer already dead. */ |
1340 | if (NILP (b->name)) | |
1341 | return Qnil; | |
1342 | ||
1ab256cb | 1343 | /* Query if the buffer is still modified. */ |
265a9e55 | 1344 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1345 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1346 | { |
a25f13ae | 1347 | GCPRO1 (buf); |
5c4930b0 RS |
1348 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1349 | b->name, make_number (0))); | |
1ab256cb | 1350 | UNGCPRO; |
265a9e55 | 1351 | if (NILP (tem)) |
1ab256cb RM |
1352 | return Qnil; |
1353 | } | |
1354 | ||
dcdffbf6 | 1355 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1356 | { |
aed13378 | 1357 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1358 | Lisp_Object arglist[1]; |
1ab256cb RM |
1359 | |
1360 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1361 | set_buffer_internal (b); | |
dcdffbf6 RS |
1362 | |
1363 | /* First run the query functions; if any query is answered no, | |
1364 | don't kill the buffer. */ | |
5b20caf0 RS |
1365 | arglist[0] = Qkill_buffer_query_functions; |
1366 | if (NILP (Frun_hook_with_args_until_failure (1, arglist))) | |
1367 | return unbind_to (count, Qnil); | |
dcdffbf6 RS |
1368 | |
1369 | /* Then run the hooks. */ | |
f1597a3a | 1370 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1371 | unbind_to (count, Qnil); |
1372 | } | |
1373 | ||
1374 | /* We have no more questions to ask. Verify that it is valid | |
1375 | to kill the buffer. This must be done after the questions | |
1376 | since anything can happen within do_yes_or_no_p. */ | |
1377 | ||
1378 | /* Don't kill the minibuffer now current. */ | |
1379 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1380 | return Qnil; | |
1381 | ||
265a9e55 | 1382 | if (NILP (b->name)) |
1ab256cb RM |
1383 | return Qnil; |
1384 | ||
336cd056 RS |
1385 | /* When we kill a base buffer, kill all its indirect buffers. |
1386 | We do it at this stage so nothing terrible happens if they | |
1387 | ask questions or their hooks get errors. */ | |
1388 | if (! b->base_buffer) | |
1389 | { | |
1390 | struct buffer *other; | |
1391 | ||
1392 | GCPRO1 (buf); | |
1393 | ||
1394 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1395 | /* all_buffers contains dead buffers too; |
1396 | don't re-kill them. */ | |
1397 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1398 | { |
1399 | Lisp_Object buf; | |
1400 | XSETBUFFER (buf, other); | |
1401 | Fkill_buffer (buf); | |
1402 | } | |
1403 | ||
1404 | UNGCPRO; | |
1405 | } | |
177c0ea7 | 1406 | |
1ab256cb RM |
1407 | /* Make this buffer not be current. |
1408 | In the process, notice if this is the sole visible buffer | |
1409 | and give up if so. */ | |
1410 | if (b == current_buffer) | |
1411 | { | |
773fbdb9 | 1412 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1413 | Fset_buffer (tem); |
1414 | if (b == current_buffer) | |
1415 | return Qnil; | |
1416 | } | |
1417 | ||
77270fac GM |
1418 | /* Notice if the buffer to kill is the sole visible buffer |
1419 | when we're currently in the mini-buffer, and give up if so. */ | |
1420 | XSETBUFFER (tem, current_buffer); | |
1421 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1422 | { | |
1423 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1424 | if (EQ (buf, tem)) |
1425 | return Qnil; | |
1426 | } | |
1427 | ||
1ab256cb RM |
1428 | /* Now there is no question: we can kill the buffer. */ |
1429 | ||
1430 | #ifdef CLASH_DETECTION | |
1431 | /* Unlock this buffer's file, if it is locked. */ | |
1432 | unlock_buffer (b); | |
1433 | #endif /* CLASH_DETECTION */ | |
1434 | ||
1ab256cb | 1435 | kill_buffer_processes (buf); |
b93fb365 | 1436 | clear_charpos_cache (b); |
1ab256cb RM |
1437 | |
1438 | tem = Vinhibit_quit; | |
1439 | Vinhibit_quit = Qt; | |
00550f94 | 1440 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1441 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1442 | frames_discard_buffer (buf); |
1ab256cb RM |
1443 | Vinhibit_quit = tem; |
1444 | ||
9cf712eb RS |
1445 | /* Delete any auto-save file, if we saved it in this session. |
1446 | But not if the buffer is modified. */ | |
a7a60ce9 | 1447 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1448 | && b->auto_save_modified != 0 |
9cf712eb | 1449 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
d674d13e RS |
1450 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1451 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1452 | { |
1453 | Lisp_Object tem; | |
1454 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1455 | if (! NILP (tem)) |
cbb6a418 | 1456 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1457 | } |
1458 | ||
4a4a9db5 KH |
1459 | if (b->base_buffer) |
1460 | { | |
1461 | /* Unchain all markers that belong to this indirect buffer. | |
1462 | Don't unchain the markers that belong to the base buffer | |
1463 | or its other indirect buffers. */ | |
65745fad | 1464 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1465 | { |
65745fad | 1466 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1467 | if (m->buffer == b) |
65745fad SM |
1468 | unchain_marker (m); |
1469 | m = next; | |
4a4a9db5 KH |
1470 | } |
1471 | } | |
1472 | else | |
1ab256cb | 1473 | { |
4a4a9db5 | 1474 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1475 | and leave them pointing nowhere. */ |
65745fad | 1476 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1477 | { |
65745fad | 1478 | struct Lisp_Marker *next = m->next; |
336cd056 | 1479 | m->buffer = 0; |
65745fad SM |
1480 | m->next = NULL; |
1481 | m = next; | |
336cd056 | 1482 | } |
65745fad | 1483 | BUF_MARKERS (b) = NULL; |
336cd056 | 1484 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1485 | |
1486 | /* Perhaps we should explicitly free the interval tree here... */ | |
1487 | } | |
33f7013e | 1488 | |
2f3f993b RS |
1489 | /* Reset the local variables, so that this buffer's local values |
1490 | won't be protected from GC. They would be protected | |
1491 | if they happened to remain encached in their symbols. | |
1492 | This gets rid of them for certain. */ | |
1493 | swap_out_buffer_local_variables (b); | |
13de9290 | 1494 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1495 | |
1ab256cb | 1496 | b->name = Qnil; |
336cd056 | 1497 | |
9ac0d9e0 | 1498 | BLOCK_INPUT; |
336cd056 | 1499 | if (! b->base_buffer) |
b86af064 | 1500 | free_buffer_text (b); |
336cd056 | 1501 | |
28e969dd JB |
1502 | if (b->newline_cache) |
1503 | { | |
1504 | free_region_cache (b->newline_cache); | |
1505 | b->newline_cache = 0; | |
1506 | } | |
1507 | if (b->width_run_cache) | |
1508 | { | |
1509 | free_region_cache (b->width_run_cache); | |
1510 | b->width_run_cache = 0; | |
1511 | } | |
1512 | b->width_table = Qnil; | |
9ac0d9e0 | 1513 | UNBLOCK_INPUT; |
1ab256cb RM |
1514 | b->undo_list = Qnil; |
1515 | ||
1516 | return Qt; | |
1517 | } | |
1518 | \f | |
36a8c287 JB |
1519 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1520 | we do this each time BUF is selected visibly, the more recently | |
1521 | selected buffers are always closer to the front of the list. This | |
1522 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1523 | |
01136e9b | 1524 | void |
1ab256cb RM |
1525 | record_buffer (buf) |
1526 | Lisp_Object buf; | |
1527 | { | |
1528 | register Lisp_Object link, prev; | |
773fbdb9 | 1529 | Lisp_Object frame; |
9ba9623d | 1530 | frame = selected_frame; |
1ab256cb RM |
1531 | |
1532 | prev = Qnil; | |
7539e11f | 1533 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1534 | { |
7539e11f | 1535 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1536 | break; |
1537 | prev = link; | |
1538 | } | |
1539 | ||
36a8c287 JB |
1540 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1541 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1542 | |
265a9e55 | 1543 | if (NILP (prev)) |
7539e11f | 1544 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1545 | else |
f3fbd155 | 1546 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1547 | |
f3fbd155 | 1548 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1549 | Vbuffer_alist = link; |
7962a441 RS |
1550 | |
1551 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1552 | ||
1553 | prev = Qnil; | |
773fbdb9 | 1554 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1555 | link = XCDR (link)) |
7962a441 | 1556 | { |
7539e11f | 1557 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1558 | break; |
1559 | prev = link; | |
1560 | } | |
1561 | ||
1562 | /* Effectively do delq. */ | |
1563 | ||
1564 | if (CONSP (link)) | |
1565 | { | |
1566 | if (NILP (prev)) | |
773fbdb9 | 1567 | set_frame_buffer_list (frame, |
7539e11f | 1568 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1569 | else |
f3fbd155 | 1570 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1571 | |
f3fbd155 | 1572 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1573 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1574 | } |
1575 | else | |
773fbdb9 | 1576 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1577 | } |
1578 | ||
a9ee7a59 | 1579 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1580 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1581 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1582 | according to `default-major-mode'. |
018ba359 | 1583 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1584 | the current buffer's major mode. */) |
1585 | (buffer) | |
a2428fa2 | 1586 | Lisp_Object buffer; |
a9ee7a59 KH |
1587 | { |
1588 | int count; | |
1589 | Lisp_Object function; | |
1590 | ||
71a0f2c6 | 1591 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1592 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1593 | function = find_symbol_value (intern ("initial-major-mode")); |
1594 | else | |
1595 | { | |
1596 | function = buffer_defaults.major_mode; | |
1597 | if (NILP (function) | |
1598 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1599 | function = current_buffer->major_mode; | |
1600 | } | |
177c0ea7 | 1601 | |
48265e61 DL |
1602 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1603 | return Qnil; | |
1604 | ||
aed13378 | 1605 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1606 | |
48265e61 DL |
1607 | /* To select a nonfundamental mode, |
1608 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1609 | |
1610 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1611 | ||
a2428fa2 | 1612 | Fset_buffer (buffer); |
48265e61 | 1613 | call0 (function); |
a9ee7a59 KH |
1614 | |
1615 | return unbind_to (count, Qnil); | |
1616 | } | |
1617 | ||
2594e0fd RS |
1618 | /* If switching buffers in WINDOW would be an error, return |
1619 | a C string saying what the error would be. */ | |
1620 | ||
1621 | char * | |
1622 | no_switch_window (window) | |
1623 | Lisp_Object window; | |
1ab256cb | 1624 | { |
1ab256cb | 1625 | Lisp_Object tem; |
2594e0fd RS |
1626 | if (EQ (minibuf_window, window)) |
1627 | return "Cannot switch buffers in minibuffer window"; | |
1628 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1629 | if (EQ (tem, Qt)) |
2594e0fd RS |
1630 | return "Cannot switch buffers in a dedicated window"; |
1631 | return NULL; | |
1632 | } | |
1633 | ||
1634 | /* Switch to buffer BUFFER in the selected window. | |
1635 | If NORECORD is non-nil, don't call record_buffer. */ | |
1636 | ||
1637 | Lisp_Object | |
1638 | switch_to_buffer_1 (buffer, norecord) | |
1639 | Lisp_Object buffer, norecord; | |
1640 | { | |
1641 | register Lisp_Object buf; | |
1ab256cb | 1642 | |
a25f13ae | 1643 | if (NILP (buffer)) |
773fbdb9 | 1644 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1645 | else |
a9ee7a59 | 1646 | { |
a25f13ae | 1647 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1648 | if (NILP (buf)) |
1649 | { | |
a25f13ae | 1650 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1651 | Fset_buffer_major_mode (buf); |
1652 | } | |
1653 | } | |
1ab256cb | 1654 | Fset_buffer (buf); |
265a9e55 | 1655 | if (NILP (norecord)) |
1ab256cb RM |
1656 | record_buffer (buf); |
1657 | ||
1658 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1659 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1660 | : selected_window, | |
2ad8731a | 1661 | buf, Qnil); |
1ab256cb | 1662 | |
cd0c235a | 1663 | return buf; |
1ab256cb RM |
1664 | } |
1665 | ||
2594e0fd | 1666 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1667 | doc: /* Select buffer BUFFER in the current window. |
a6dced2a LT |
1668 | If BUFFER does not identify an existing buffer, |
1669 | then this function creates a buffer with that name. | |
1670 | ||
1671 | When called from Lisp, BUFFER may be a buffer, a string \(a buffer name), | |
1672 | or nil. If BUFFER is nil, then this function chooses a buffer | |
1673 | using `other-buffer'. | |
018ba359 PJ |
1674 | Optional second arg NORECORD non-nil means |
1675 | do not put this buffer at the front of the list of recently selected ones. | |
a6dced2a | 1676 | This function returns the buffer it switched to. |
018ba359 PJ |
1677 | |
1678 | WARNING: This is NOT the way to work on another buffer temporarily | |
1679 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1680 | the window-buffer correspondences. */) |
1681 | (buffer, norecord) | |
2594e0fd RS |
1682 | Lisp_Object buffer, norecord; |
1683 | { | |
1684 | char *err; | |
1685 | ||
27c6b98e SM |
1686 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
1687 | /* Basically a NOP. Avoid signalling an error if the selected window | |
1688 | is dedicated, or a minibuffer, ... */ | |
1689 | return Fset_buffer (buffer); | |
1690 | ||
2594e0fd RS |
1691 | err = no_switch_window (selected_window); |
1692 | if (err) error (err); | |
1693 | ||
1694 | return switch_to_buffer_1 (buffer, norecord); | |
1695 | } | |
1696 | ||
cd0c235a | 1697 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1698 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
a6dced2a LT |
1699 | BUFFER may be a buffer, a string \(a buffer name), or nil. |
1700 | If BUFFER is a string which is not the name of an existing buffer, | |
1701 | then this function creates a buffer with that name. | |
1702 | If BUFFER is nil, then it chooses some other buffer. | |
018ba359 | 1703 | If `pop-up-windows' is non-nil, windows can be split to do this. |
e198ba87 | 1704 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another |
ae47339f RS |
1705 | window even if BUFFER is already visible in the selected window, |
1706 | and ignore `same-window-regexps' and `same-window-buffer-names'. | |
a6dced2a | 1707 | This function returns the buffer it switched to. |
018ba359 PJ |
1708 | This uses the function `display-buffer' as a subroutine; see the documentation |
1709 | of `display-buffer' for additional customization information. | |
1710 | ||
1711 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1712 | do not put this buffer at the front of the list of recently selected ones. */) |
1713 | (buffer, other_window, norecord) | |
6d12711f | 1714 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1715 | { |
1716 | register Lisp_Object buf; | |
a25f13ae | 1717 | if (NILP (buffer)) |
773fbdb9 | 1718 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1719 | else |
7c2087ee | 1720 | { |
a25f13ae | 1721 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1722 | if (NILP (buf)) |
1723 | { | |
a25f13ae | 1724 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1725 | Fset_buffer_major_mode (buf); |
1726 | } | |
1727 | } | |
1ab256cb | 1728 | Fset_buffer (buf); |
6d12711f | 1729 | if (NILP (norecord)) |
f1321dc3 | 1730 | /* Why bother ? Fselect_window will do it for us anyway. -stef */ |
6d12711f | 1731 | record_buffer (buf); |
f1321dc3 | 1732 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord); |
e8b3a22d | 1733 | return buf; |
1ab256cb RM |
1734 | } |
1735 | ||
1736 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1737 | doc: /* Return the current buffer as a Lisp object. */) |
1738 | () | |
1ab256cb RM |
1739 | { |
1740 | register Lisp_Object buf; | |
67180c6a | 1741 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1742 | return buf; |
1743 | } | |
1744 | \f | |
7ec44ec6 GM |
1745 | /* Set the current buffer to B. |
1746 | ||
1747 | We previously set windows_or_buffers_changed here to invalidate | |
1748 | global unchanged information in beg_unchanged and end_unchanged. | |
1749 | This is no longer necessary because we now compute unchanged | |
1750 | information on a buffer-basis. Every action affecting other | |
1751 | windows than the selected one requires a select_window at some | |
1752 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1753 | |
1754 | void | |
1755 | set_buffer_internal (b) | |
1756 | register struct buffer *b; | |
1757 | { | |
b5a225b4 | 1758 | if (current_buffer != b) |
7ec44ec6 | 1759 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1760 | } |
1761 | ||
1762 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1763 | This is used by redisplay. */ | |
1764 | ||
1765 | void | |
1766 | set_buffer_internal_1 (b) | |
1767 | register struct buffer *b; | |
1768 | { | |
1769 | register struct buffer *old_buf; | |
1770 | register Lisp_Object tail, valcontents; | |
1771 | Lisp_Object tem; | |
1772 | ||
b86af064 | 1773 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1774 | if (b->text->beg == NULL) |
b86af064 GM |
1775 | enlarge_buffer_text (b, 0); |
1776 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1777 | |
c7aa5005 KH |
1778 | if (current_buffer == b) |
1779 | return; | |
1780 | ||
1ab256cb RM |
1781 | old_buf = current_buffer; |
1782 | current_buffer = b; | |
1783 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1784 | ||
336cd056 RS |
1785 | if (old_buf) |
1786 | { | |
1787 | /* Put the undo list back in the base buffer, so that it appears | |
1788 | that an indirect buffer shares the undo list of its base. */ | |
1789 | if (old_buf->base_buffer) | |
1790 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1791 | ||
1792 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1793 | when it is not current, update them now. */ | |
1794 | if (! NILP (old_buf->pt_marker)) | |
1795 | { | |
1796 | Lisp_Object obuf; | |
1797 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1798 | set_marker_both (old_buf->pt_marker, obuf, |
1799 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1800 | } |
1801 | if (! NILP (old_buf->begv_marker)) | |
1802 | { | |
1803 | Lisp_Object obuf; | |
1804 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1805 | set_marker_both (old_buf->begv_marker, obuf, |
1806 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1807 | } |
1808 | if (! NILP (old_buf->zv_marker)) | |
1809 | { | |
1810 | Lisp_Object obuf; | |
1811 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1812 | set_marker_both (old_buf->zv_marker, obuf, |
1813 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1814 | } |
1815 | } | |
1816 | ||
1817 | /* Get the undo list from the base buffer, so that it appears | |
1818 | that an indirect buffer shares the undo list of its base. */ | |
1819 | if (b->base_buffer) | |
1820 | b->undo_list = b->base_buffer->undo_list; | |
1821 | ||
1822 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1823 | when it is not current, fetch them now. */ | |
1824 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1825 | { |
1826 | BUF_PT (b) = marker_position (b->pt_marker); | |
1827 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1828 | } | |
336cd056 | 1829 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1830 | { |
1831 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1832 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1833 | } | |
336cd056 | 1834 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1835 | { |
1836 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1837 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1838 | } | |
336cd056 | 1839 | |
1ab256cb RM |
1840 | /* Look down buffer's list of local Lisp variables |
1841 | to find and update any that forward into C variables. */ | |
1842 | ||
65745fad | 1843 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1844 | { |
f5c1dd0d | 1845 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1846 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1847 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1848 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1849 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1850 | /* Just reference the variable |
1851 | to cause it to become set for this buffer. */ | |
7539e11f | 1852 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1853 | } |
1854 | ||
1855 | /* Do the same with any others that were local to the previous buffer */ | |
1856 | ||
1857 | if (old_buf) | |
65745fad | 1858 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1859 | { |
f5c1dd0d | 1860 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1861 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1862 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1863 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1864 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1865 | /* Just reference the variable |
1866 | to cause it to become set for this buffer. */ | |
7539e11f | 1867 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1868 | } |
1869 | } | |
1870 | ||
336cd056 | 1871 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1872 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1873 | |
1874 | void | |
1875 | set_buffer_temp (b) | |
1876 | struct buffer *b; | |
1877 | { | |
1878 | register struct buffer *old_buf; | |
1879 | ||
1880 | if (current_buffer == b) | |
1881 | return; | |
1882 | ||
1883 | old_buf = current_buffer; | |
1884 | current_buffer = b; | |
1885 | ||
1886 | if (old_buf) | |
1887 | { | |
1888 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1889 | when it is not current, update them now. */ | |
1890 | if (! NILP (old_buf->pt_marker)) | |
1891 | { | |
1892 | Lisp_Object obuf; | |
1893 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1894 | set_marker_both (old_buf->pt_marker, obuf, |
1895 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1896 | } |
1897 | if (! NILP (old_buf->begv_marker)) | |
1898 | { | |
1899 | Lisp_Object obuf; | |
1900 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1901 | set_marker_both (old_buf->begv_marker, obuf, |
1902 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1903 | } |
1904 | if (! NILP (old_buf->zv_marker)) | |
1905 | { | |
1906 | Lisp_Object obuf; | |
1907 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1908 | set_marker_both (old_buf->zv_marker, obuf, |
1909 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1910 | } |
1911 | } | |
1912 | ||
1913 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1914 | when it is not current, fetch them now. */ | |
1915 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1916 | { |
1917 | BUF_PT (b) = marker_position (b->pt_marker); | |
1918 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1919 | } | |
336cd056 | 1920 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1921 | { |
1922 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1923 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1924 | } | |
336cd056 | 1925 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1926 | { |
1927 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1928 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1929 | } | |
336cd056 RS |
1930 | } |
1931 | ||
1ab256cb | 1932 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1933 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1934 | BUFFER may be a buffer or the name of an existing buffer. |
1935 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1936 | This function does not display the buffer, so its effect ends | |
1937 | when the current command terminates. | |
7ee72033 MB |
1938 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1939 | (buffer) | |
a25f13ae | 1940 | register Lisp_Object buffer; |
1ab256cb | 1941 | { |
a25f13ae KH |
1942 | register Lisp_Object buf; |
1943 | buf = Fget_buffer (buffer); | |
1944 | if (NILP (buf)) | |
1945 | nsberror (buffer); | |
1946 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1947 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1948 | set_buffer_internal (XBUFFER (buf)); |
1949 | return buf; | |
1ab256cb | 1950 | } |
d0628b06 RS |
1951 | |
1952 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1953 | ||
1954 | Lisp_Object | |
1955 | set_buffer_if_live (buffer) | |
1956 | Lisp_Object buffer; | |
1957 | { | |
1958 | if (! NILP (XBUFFER (buffer)->name)) | |
1959 | Fset_buffer (buffer); | |
1960 | return Qnil; | |
1961 | } | |
1ab256cb RM |
1962 | \f |
1963 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1964 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
1965 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
1966 | () | |
1ab256cb | 1967 | { |
a96b68f1 RS |
1968 | if (!NILP (current_buffer->read_only) |
1969 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1970 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1971 | return Qnil; | |
1972 | } | |
1973 | ||
1974 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 1975 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
1976 | There it is the least likely candidate for `other-buffer' to return; |
1977 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
1978 | If BUFFER is nil or omitted, bury the current buffer. | |
1979 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
1980 | selected window if it is displayed there. */) |
1981 | (buffer) | |
a2428fa2 | 1982 | register Lisp_Object buffer; |
1ab256cb | 1983 | { |
b271272a | 1984 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1985 | if (NILP (buffer)) |
a5611885 | 1986 | { |
c58dab63 | 1987 | Lisp_Object tem; |
a2428fa2 | 1988 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1989 | |
c58dab63 | 1990 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1991 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1992 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1993 | { |
1994 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1995 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1996 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1997 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1998 | else | |
1999 | Fdelete_window (selected_window); | |
2000 | } | |
a5611885 | 2001 | } |
1ab256cb RM |
2002 | else |
2003 | { | |
2004 | Lisp_Object buf1; | |
177c0ea7 | 2005 | |
a2428fa2 | 2006 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2007 | if (NILP (buf1)) |
a2428fa2 EN |
2008 | nsberror (buffer); |
2009 | buffer = buf1; | |
b271272a JB |
2010 | } |
2011 | ||
a1a8b28e GM |
2012 | /* Move buffer to the end of the buffer list. Do nothing if the |
2013 | buffer is killed. */ | |
2014 | if (!NILP (XBUFFER (buffer)->name)) | |
2015 | { | |
2016 | Lisp_Object aelt, link; | |
b271272a | 2017 | |
a1a8b28e GM |
2018 | aelt = Frassq (buffer, Vbuffer_alist); |
2019 | link = Fmemq (aelt, Vbuffer_alist); | |
2020 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2021 | XSETCDR (link, Qnil); |
a1a8b28e | 2022 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2023 | |
6c488ddb RS |
2024 | /* Removing BUFFER from frame-specific lists |
2025 | has the effect of putting BUFFER at the end | |
2026 | of the combined list in each frame. */ | |
2027 | frames_discard_buffer (buffer); | |
a1a8b28e | 2028 | } |
dec989eb | 2029 | |
1ab256cb RM |
2030 | return Qnil; |
2031 | } | |
2032 | \f | |
c922bc55 | 2033 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2034 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2035 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2036 | so the buffer is truly empty after this. */) |
2037 | () | |
1ab256cb RM |
2038 | { |
2039 | Fwiden (); | |
c0d9a0c3 GM |
2040 | |
2041 | del_range (BEG, Z); | |
c280bc6a | 2042 | |
1ab256cb RM |
2043 | current_buffer->last_window_start = 1; |
2044 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2045 | if future size is less than past size. Use of erase-buffer | |
2046 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2047 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2048 | return Qnil; |
2049 | } | |
2050 | ||
01136e9b | 2051 | void |
1ab256cb RM |
2052 | validate_region (b, e) |
2053 | register Lisp_Object *b, *e; | |
2054 | { | |
b7826503 PJ |
2055 | CHECK_NUMBER_COERCE_MARKER (*b); |
2056 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2057 | |
2058 | if (XINT (*b) > XINT (*e)) | |
2059 | { | |
03192067 KH |
2060 | Lisp_Object tem; |
2061 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2062 | } |
2063 | ||
2064 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2065 | && XINT (*e) <= ZV)) | |
2066 | args_out_of_range (*b, *e); | |
2067 | } | |
2068 | \f | |
b05525fa RS |
2069 | /* Advance BYTE_POS up to a character boundary |
2070 | and return the adjusted position. */ | |
2071 | ||
2072 | static int | |
2073 | advance_to_char_boundary (byte_pos) | |
2074 | int byte_pos; | |
2075 | { | |
f8449323 | 2076 | int c; |
b05525fa | 2077 | |
f8449323 RS |
2078 | if (byte_pos == BEG) |
2079 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2080 | return BEG; |
f8449323 RS |
2081 | |
2082 | c = FETCH_BYTE (byte_pos); | |
2083 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2084 | { |
1be6387d | 2085 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2086 | multibyte sequence. */ |
a9bcded1 KH |
2087 | int orig_byte_pos = byte_pos; |
2088 | ||
2089 | do | |
2090 | { | |
2091 | byte_pos--; | |
2092 | c = FETCH_BYTE (byte_pos); | |
2093 | } | |
2094 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2095 | INC_POS (byte_pos); |
a9bcded1 KH |
2096 | if (byte_pos < orig_byte_pos) |
2097 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2098 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2099 | surely advance to the correct character boundary. If C is | |
2100 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2101 | } |
2102 | ||
20773569 | 2103 | return byte_pos; |
b05525fa RS |
2104 | } |
2105 | ||
3ac81adb RS |
2106 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2107 | 1, 1, 0, | |
7ee72033 | 2108 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2109 | If FLAG is t, this makes the buffer a multibyte buffer. |
2110 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
2111 | The buffer contents remain unchanged as a sequence of bytes | |
fc1d15f6 KH |
2112 | but the contents viewed as characters do change. |
2113 | If the multibyte flag was really changed, undo information of the | |
2114 | current buffer is cleared. */) | |
7ee72033 | 2115 | (flag) |
3ac81adb RS |
2116 | Lisp_Object flag; |
2117 | { | |
65745fad | 2118 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2119 | struct buffer *other; |
a9bcded1 | 2120 | int undo_enabled_p = !EQ (current_buffer->undo_list, Qt); |
458c8af4 | 2121 | int begv, zv; |
8d1203ea | 2122 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2123 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
3ac81adb | 2124 | |
6e553d5e RS |
2125 | if (current_buffer->base_buffer) |
2126 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2127 | ||
70e77119 AS |
2128 | /* Do nothing if nothing actually changes. */ |
2129 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2130 | return flag; | |
2131 | ||
b05525fa RS |
2132 | /* It would be better to update the list, |
2133 | but this is good enough for now. */ | |
a9bcded1 KH |
2134 | if (undo_enabled_p) |
2135 | current_buffer->undo_list = Qt; | |
b05525fa | 2136 | |
3ac81adb RS |
2137 | /* If the cached position is for this buffer, clear it out. */ |
2138 | clear_charpos_cache (current_buffer); | |
2139 | ||
458c8af4 KH |
2140 | if (NILP (flag)) |
2141 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2142 | else | |
2143 | begv = BEGV, zv = ZV; | |
2144 | ||
a9bcded1 KH |
2145 | if (narrowed) |
2146 | Fwiden (); | |
2147 | ||
3ac81adb RS |
2148 | if (NILP (flag)) |
2149 | { | |
a9bcded1 KH |
2150 | int pos, stop; |
2151 | unsigned char *p; | |
2152 | ||
3ac81adb RS |
2153 | /* Do this first, so it can use CHAR_TO_BYTE |
2154 | to calculate the old correspondences. */ | |
2155 | set_intervals_multibyte (0); | |
2156 | ||
2157 | current_buffer->enable_multibyte_characters = Qnil; | |
2158 | ||
2159 | Z = Z_BYTE; | |
2160 | BEGV = BEGV_BYTE; | |
2161 | ZV = ZV_BYTE; | |
2162 | GPT = GPT_BYTE; | |
2163 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2164 | ||
60ebfdf3 | 2165 | |
65745fad SM |
2166 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2167 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2168 | |
2169 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2170 | pos = BEG; | |
2171 | stop = GPT; | |
2172 | p = BEG_ADDR; | |
2173 | while (1) | |
2174 | { | |
2175 | int c, bytes; | |
2176 | ||
2177 | if (pos == stop) | |
2178 | { | |
2179 | if (pos == Z) | |
2180 | break; | |
2181 | p = GAP_END_ADDR; | |
2182 | stop = Z; | |
2183 | } | |
2184 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2185 | p += bytes, pos += bytes; | |
2186 | else | |
2187 | { | |
2188 | c = STRING_CHAR (p, stop - pos); | |
2189 | /* Delete all bytes for this 8-bit character but the | |
2190 | last one, and change the last one to the charcter | |
2191 | code. */ | |
2192 | bytes--; | |
2193 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2194 | p = GAP_END_ADDR; | |
2195 | *p++ = c; | |
2196 | pos++; | |
2197 | if (begv > pos) | |
2198 | begv -= bytes; | |
2199 | if (zv > pos) | |
2200 | zv -= bytes; | |
2201 | stop = Z; | |
2202 | } | |
2203 | } | |
2204 | if (narrowed) | |
2205 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2206 | } |
2207 | else | |
2208 | { | |
a9bcded1 KH |
2209 | int pt = PT; |
2210 | int pos, stop; | |
2211 | unsigned char *p; | |
2212 | ||
673c57d2 | 2213 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2214 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2215 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2216 | |
2217 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2218 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2219 | { | |
2220 | unsigned char *p = GPT_ADDR - 1; | |
2221 | ||
2222 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2223 | if (BASE_LEADING_CODE_P (*p)) | |
2224 | { | |
2225 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2226 | ||
2227 | move_gap_both (new_gpt, new_gpt); | |
2228 | } | |
2229 | } | |
2230 | ||
a9bcded1 KH |
2231 | /* Make the buffer contents valid as multibyte by converting |
2232 | 8-bit characters to multibyte form. */ | |
2233 | pos = BEG; | |
2234 | stop = GPT; | |
2235 | p = BEG_ADDR; | |
2236 | while (1) | |
2237 | { | |
2238 | int bytes; | |
2239 | ||
2240 | if (pos == stop) | |
2241 | { | |
2242 | if (pos == Z) | |
2243 | break; | |
2244 | p = GAP_END_ADDR; | |
2245 | stop = Z; | |
2246 | } | |
177c0ea7 | 2247 | |
a9bcded1 KH |
2248 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) |
2249 | p += bytes, pos += bytes; | |
2250 | else | |
2251 | { | |
2252 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2253 | ||
2254 | bytes = CHAR_STRING (*p, tmp); | |
2255 | *p = tmp[0]; | |
2256 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2257 | bytes--; | |
2258 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2259 | /* Now the gap is after the just inserted data. */ | |
2260 | pos = GPT; | |
2261 | p = GAP_END_ADDR; | |
2262 | if (pos <= begv) | |
2263 | begv += bytes; | |
2264 | if (pos <= zv) | |
2265 | zv += bytes; | |
2266 | if (pos <= pt) | |
2267 | pt += bytes; | |
2268 | stop = Z; | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | if (pt != PT) | |
2273 | TEMP_SET_PT (pt); | |
2274 | ||
2275 | if (narrowed) | |
2276 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2277 | ||
3ac81adb RS |
2278 | /* Do this first, so that chars_in_text asks the right question. |
2279 | set_intervals_multibyte needs it too. */ | |
2280 | current_buffer->enable_multibyte_characters = Qt; | |
2281 | ||
b05525fa | 2282 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2283 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2284 | |
673c57d2 | 2285 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2286 | |
2287 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2288 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2289 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2290 | else |
2291 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2292 | |
2293 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2294 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2295 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2296 | else |
2297 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2298 | |
2299 | { | |
2300 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2301 | int pt; | |
2302 | ||
2303 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2304 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2305 | else |
2306 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2307 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2308 | } | |
3ac81adb RS |
2309 | |
2310 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2311 | |
2312 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2313 | getting confused by the markers that have not yet been updated. | |
2314 | It is also a signal that it should never create a marker. */ | |
65745fad | 2315 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2316 | |
65745fad | 2317 | for (; tail; tail = tail->next) |
3ac81adb | 2318 | { |
65745fad SM |
2319 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2320 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2321 | } |
b69f9797 RS |
2322 | |
2323 | /* Make sure no markers were put on the chain | |
2324 | while the chain value was incorrect. */ | |
65745fad | 2325 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2326 | abort (); |
2327 | ||
3ac81adb RS |
2328 | BUF_MARKERS (current_buffer) = markers; |
2329 | ||
2330 | /* Do this last, so it can calculate the new correspondences | |
2331 | between chars and bytes. */ | |
2332 | set_intervals_multibyte (1); | |
2333 | } | |
2334 | ||
a9bcded1 KH |
2335 | if (undo_enabled_p) |
2336 | current_buffer->undo_list = Qnil; | |
2337 | ||
724b203f GM |
2338 | /* Changing the multibyteness of a buffer means that all windows |
2339 | showing that buffer must be updated thoroughly. */ | |
2340 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2341 | ++windows_or_buffers_changed; | |
2342 | ||
abc9d959 RS |
2343 | /* Copy this buffer's new multibyte status |
2344 | into all of its indirect buffers. */ | |
2345 | for (other = all_buffers; other; other = other->next) | |
2346 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2347 | { |
2348 | other->enable_multibyte_characters | |
2349 | = current_buffer->enable_multibyte_characters; | |
2350 | other->prevent_redisplay_optimizations_p = 1; | |
2351 | } | |
abc9d959 | 2352 | |
ed00559d KH |
2353 | /* Restore the modifiedness of the buffer. */ |
2354 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2355 | Fset_buffer_modified_p (Qnil); | |
2356 | ||
2a2b50a9 | 2357 | #ifdef subprocesses |
172f9454 KH |
2358 | /* Update coding systems of this buffer's process (if any). */ |
2359 | { | |
2360 | Lisp_Object process; | |
2361 | ||
2362 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2363 | if (PROCESSP (process)) | |
2364 | setup_process_coding_systems (process); | |
2365 | } | |
2a2b50a9 | 2366 | #endif /* subprocesses */ |
172f9454 | 2367 | |
3ac81adb RS |
2368 | return flag; |
2369 | } | |
2370 | \f | |
1ab256cb | 2371 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2372 | 0, 0, 0, |
7ee72033 | 2373 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2374 | Most local variable bindings are eliminated so that the default values |
2375 | become effective once more. Also, the syntax table is set from | |
2376 | `standard-syntax-table', the local keymap is set to nil, | |
2377 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2378 | This function also forces redisplay of the mode line. | |
2379 | ||
2380 | Every function to select a new major mode starts by | |
2381 | calling this function. | |
2382 | ||
2383 | As a special exception, local variables whose names have | |
2384 | a non-nil `permanent-local' property are not eliminated by this function. | |
2385 | ||
2386 | The first thing this function does is run | |
7ee72033 MB |
2387 | the normal hook `change-major-mode-hook'. */) |
2388 | () | |
1ab256cb RM |
2389 | { |
2390 | register Lisp_Object alist, sym, tem; | |
2391 | Lisp_Object oalist; | |
7410477a | 2392 | |
fd186f07 RS |
2393 | if (!NILP (Vrun_hooks)) |
2394 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
2395 | oalist = current_buffer->local_var_alist; |
2396 | ||
2f3f993b RS |
2397 | /* Make sure none of the bindings in oalist |
2398 | remain swapped in, in their symbols. */ | |
1ab256cb | 2399 | |
2f3f993b | 2400 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2401 | |
2402 | /* Actually eliminate all local bindings of this buffer. */ | |
2403 | ||
13de9290 | 2404 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2405 | |
1ab256cb RM |
2406 | /* Any which are supposed to be permanent, |
2407 | make local again, with the same values they had. */ | |
177c0ea7 | 2408 | |
7539e11f | 2409 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2410 | { |
7539e11f | 2411 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2412 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2413 | if (! NILP (tem)) |
01050cb5 RM |
2414 | { |
2415 | Fmake_local_variable (sym); | |
7539e11f | 2416 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2417 | } |
1ab256cb RM |
2418 | } |
2419 | ||
2420 | /* Force mode-line redisplay. Useful here because all major mode | |
2421 | commands call this function. */ | |
2422 | update_mode_lines++; | |
2423 | ||
2424 | return Qnil; | |
2425 | } | |
2f3f993b RS |
2426 | |
2427 | /* Make sure no local variables remain set up with buffer B | |
2428 | for their current values. */ | |
2429 | ||
2430 | static void | |
2431 | swap_out_buffer_local_variables (b) | |
2432 | struct buffer *b; | |
2433 | { | |
2434 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2435 | ||
2436 | XSETBUFFER (buffer, b); | |
2437 | oalist = b->local_var_alist; | |
2438 | ||
7539e11f | 2439 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2440 | { |
7539e11f | 2441 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2442 | |
2443 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2444 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2445 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2446 | { |
2447 | /* Symbol is set up for this buffer's old local value. | |
2448 | Set it up for the current buffer with the default value. */ | |
2449 | ||
f5c1dd0d | 2450 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2451 | /* Store the symbol's current value into the alist entry |
2452 | it is currently set up for. This is so that, if the | |
2453 | local is marked permanent, and we make it local again | |
2454 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2455 | XSETCDR (XCAR (tem), |
2456 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2457 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2458 | XSETCAR (tem, tem); |
2f3f993b | 2459 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2460 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2461 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2462 | store_symval_forwarding (sym, |
f5c1dd0d | 2463 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2464 | XCDR (tem), NULL); |
2f3f993b RS |
2465 | } |
2466 | } | |
2467 | } | |
1ab256cb | 2468 | \f |
2eec3b4e | 2469 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2470 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2471 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 JB |
2472 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2473 | or ZV if there are no more overlays. | |
bbbe9545 | 2474 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2475 | or where an overlay starts which ends at or after POS; |
2476 | or BEGV if there are no such overlays. | |
239c932b | 2477 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2478 | |
2479 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2480 | when this function is called. |
2481 | ||
2482 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2483 | If EXTEND is zero, we never extend the vector, | |
2484 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2485 | But we still return the total number of overlays. |
2486 | ||
2487 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2488 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2489 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2490 | |
2491 | int | |
ac869cf7 | 2492 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2493 | EMACS_INT pos; |
61d54cd5 | 2494 | int extend; |
2eec3b4e RS |
2495 | Lisp_Object **vec_ptr; |
2496 | int *len_ptr; | |
2497 | int *next_ptr; | |
239c932b | 2498 | int *prev_ptr; |
ac869cf7 | 2499 | int change_req; |
1ab256cb | 2500 | { |
2410d73a SM |
2501 | Lisp_Object overlay, start, end; |
2502 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2503 | int idx = 0; |
2504 | int len = *len_ptr; | |
2505 | Lisp_Object *vec = *vec_ptr; | |
2506 | int next = ZV; | |
239c932b | 2507 | int prev = BEGV; |
61d54cd5 RS |
2508 | int inhibit_storing = 0; |
2509 | ||
2410d73a | 2510 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2511 | { |
239c932b | 2512 | int startpos, endpos; |
52f8ec73 | 2513 | |
2410d73a | 2514 | XSETMISC (overlay, tail); |
1ab256cb | 2515 | |
2eec3b4e RS |
2516 | start = OVERLAY_START (overlay); |
2517 | end = OVERLAY_END (overlay); | |
239c932b RS |
2518 | endpos = OVERLAY_POSITION (end); |
2519 | if (endpos < pos) | |
2520 | { | |
2521 | if (prev < endpos) | |
2522 | prev = endpos; | |
2523 | break; | |
2524 | } | |
413e06a4 RS |
2525 | startpos = OVERLAY_POSITION (start); |
2526 | /* This one ends at or after POS | |
daa1c109 | 2527 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2528 | if (prev < startpos && startpos < pos) |
2529 | prev = startpos; | |
239c932b RS |
2530 | if (endpos == pos) |
2531 | continue; | |
2eec3b4e RS |
2532 | if (startpos <= pos) |
2533 | { | |
2534 | if (idx == len) | |
2535 | { | |
61d54cd5 RS |
2536 | /* The supplied vector is full. |
2537 | Either make it bigger, or don't store any more in it. */ | |
2538 | if (extend) | |
2539 | { | |
0552666b GM |
2540 | /* Make it work with an initial len == 0. */ |
2541 | len *= 2; | |
2542 | if (len == 0) | |
2543 | len = 4; | |
2544 | *len_ptr = len; | |
61d54cd5 RS |
2545 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2546 | *vec_ptr = vec; | |
2547 | } | |
2548 | else | |
2549 | inhibit_storing = 1; | |
2eec3b4e | 2550 | } |
61d54cd5 RS |
2551 | |
2552 | if (!inhibit_storing) | |
2553 | vec[idx] = overlay; | |
2554 | /* Keep counting overlays even if we can't return them all. */ | |
2555 | idx++; | |
2eec3b4e RS |
2556 | } |
2557 | else if (startpos < next) | |
2558 | next = startpos; | |
2559 | } | |
2560 | ||
2410d73a | 2561 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2562 | { |
239c932b | 2563 | int startpos, endpos; |
52f8ec73 | 2564 | |
2410d73a | 2565 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2566 | |
2567 | start = OVERLAY_START (overlay); | |
2568 | end = OVERLAY_END (overlay); | |
2569 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2570 | if (pos < startpos) |
2eec3b4e RS |
2571 | { |
2572 | if (startpos < next) | |
2573 | next = startpos; | |
2574 | break; | |
2575 | } | |
239c932b RS |
2576 | endpos = OVERLAY_POSITION (end); |
2577 | if (pos < endpos) | |
2eec3b4e RS |
2578 | { |
2579 | if (idx == len) | |
2580 | { | |
61d54cd5 RS |
2581 | if (extend) |
2582 | { | |
4b0e44fc RS |
2583 | /* Make it work with an initial len == 0. */ |
2584 | len *= 2; | |
0552666b | 2585 | if (len == 0) |
4b0e44fc RS |
2586 | len = 4; |
2587 | *len_ptr = len; | |
61d54cd5 RS |
2588 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2589 | *vec_ptr = vec; | |
2590 | } | |
2591 | else | |
2592 | inhibit_storing = 1; | |
2eec3b4e | 2593 | } |
61d54cd5 RS |
2594 | |
2595 | if (!inhibit_storing) | |
2596 | vec[idx] = overlay; | |
2597 | idx++; | |
413e06a4 RS |
2598 | |
2599 | if (startpos < pos && startpos > prev) | |
2600 | prev = startpos; | |
2eec3b4e | 2601 | } |
239c932b RS |
2602 | else if (endpos < pos && endpos > prev) |
2603 | prev = endpos; | |
1d5f4c1d MB |
2604 | else if (endpos == pos && startpos > prev |
2605 | && (!change_req || startpos < pos)) | |
413e06a4 | 2606 | prev = startpos; |
1ab256cb RM |
2607 | } |
2608 | ||
239c932b RS |
2609 | if (next_ptr) |
2610 | *next_ptr = next; | |
2611 | if (prev_ptr) | |
2612 | *prev_ptr = prev; | |
2eec3b4e RS |
2613 | return idx; |
2614 | } | |
74514898 RS |
2615 | \f |
2616 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2617 | or are empty at BEG. |
2618 | ||
177c0ea7 | 2619 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2620 | Store in *LEN_PTR the size allocated for the vector. |
2621 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2622 | or ZV if there are no more overlays. | |
2623 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2624 | or BEGV if there are no previous overlays. | |
2625 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2626 | ||
2627 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2628 | when this function is called. | |
2629 | ||
2630 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2631 | If EXTEND is zero, we never extend the vector, | |
2632 | and we store only as many overlays as will fit. | |
2633 | But we still return the total number of overlays. */ | |
2634 | ||
a9b9a780 | 2635 | static int |
74514898 RS |
2636 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2637 | int beg, end; | |
2638 | int extend; | |
2639 | Lisp_Object **vec_ptr; | |
2640 | int *len_ptr; | |
2641 | int *next_ptr; | |
2642 | int *prev_ptr; | |
2643 | { | |
2410d73a SM |
2644 | Lisp_Object overlay, ostart, oend; |
2645 | struct Lisp_Overlay *tail; | |
74514898 RS |
2646 | int idx = 0; |
2647 | int len = *len_ptr; | |
2648 | Lisp_Object *vec = *vec_ptr; | |
2649 | int next = ZV; | |
2650 | int prev = BEGV; | |
2651 | int inhibit_storing = 0; | |
2652 | ||
2410d73a | 2653 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2654 | { |
2655 | int startpos, endpos; | |
2656 | ||
2410d73a | 2657 | XSETMISC (overlay, tail); |
74514898 RS |
2658 | |
2659 | ostart = OVERLAY_START (overlay); | |
2660 | oend = OVERLAY_END (overlay); | |
2661 | endpos = OVERLAY_POSITION (oend); | |
2662 | if (endpos < beg) | |
2663 | { | |
2664 | if (prev < endpos) | |
2665 | prev = endpos; | |
2666 | break; | |
2667 | } | |
2668 | startpos = OVERLAY_POSITION (ostart); | |
2669 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2670 | or is empty at the start of the range. */ |
74514898 | 2671 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2672 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2673 | { |
2674 | if (idx == len) | |
2675 | { | |
2676 | /* The supplied vector is full. | |
2677 | Either make it bigger, or don't store any more in it. */ | |
2678 | if (extend) | |
2679 | { | |
4b0e44fc RS |
2680 | /* Make it work with an initial len == 0. */ |
2681 | len *= 2; | |
2682 | if (len == 0) | |
2683 | len = 4; | |
2684 | *len_ptr = len; | |
74514898 RS |
2685 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2686 | *vec_ptr = vec; | |
2687 | } | |
2688 | else | |
2689 | inhibit_storing = 1; | |
2690 | } | |
2691 | ||
2692 | if (!inhibit_storing) | |
2693 | vec[idx] = overlay; | |
2694 | /* Keep counting overlays even if we can't return them all. */ | |
2695 | idx++; | |
2696 | } | |
2697 | else if (startpos < next) | |
2698 | next = startpos; | |
2699 | } | |
2700 | ||
2410d73a | 2701 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2702 | { |
2703 | int startpos, endpos; | |
2704 | ||
2410d73a | 2705 | XSETMISC (overlay, tail); |
74514898 RS |
2706 | |
2707 | ostart = OVERLAY_START (overlay); | |
2708 | oend = OVERLAY_END (overlay); | |
2709 | startpos = OVERLAY_POSITION (ostart); | |
2710 | if (end < startpos) | |
2711 | { | |
2712 | if (startpos < next) | |
2713 | next = startpos; | |
2714 | break; | |
2715 | } | |
2716 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2717 | /* Count an interval if it either overlaps the range |
2718 | or is empty at the start of the range. */ | |
74514898 | 2719 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2720 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2721 | { |
2722 | if (idx == len) | |
2723 | { | |
2724 | if (extend) | |
2725 | { | |
4b0e44fc RS |
2726 | /* Make it work with an initial len == 0. */ |
2727 | len *= 2; | |
2728 | if (len == 0) | |
2729 | len = 4; | |
2730 | *len_ptr = len; | |
74514898 RS |
2731 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2732 | *vec_ptr = vec; | |
2733 | } | |
2734 | else | |
2735 | inhibit_storing = 1; | |
2736 | } | |
2737 | ||
2738 | if (!inhibit_storing) | |
2739 | vec[idx] = overlay; | |
2740 | idx++; | |
2741 | } | |
2742 | else if (endpos < beg && endpos > prev) | |
2743 | prev = endpos; | |
2744 | } | |
fc04fa47 | 2745 | |
74514898 RS |
2746 | if (next_ptr) |
2747 | *next_ptr = next; | |
2748 | if (prev_ptr) | |
2749 | *prev_ptr = prev; | |
2750 | return idx; | |
2751 | } | |
09a22085 GM |
2752 | |
2753 | ||
2754 | /* Return non-zero if there exists an overlay with a non-nil | |
2755 | `mouse-face' property overlapping OVERLAY. */ | |
2756 | ||
2757 | int | |
2758 | mouse_face_overlay_overlaps (overlay) | |
2759 | Lisp_Object overlay; | |
2760 | { | |
2761 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2762 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2763 | int n, i, size; |
09a22085 | 2764 | Lisp_Object *v, tem; |
177c0ea7 | 2765 | |
bfd8410f GM |
2766 | size = 10; |
2767 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2768 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2769 | if (n > size) | |
09a22085 | 2770 | { |
09a22085 GM |
2771 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2772 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2773 | } | |
2774 | ||
2775 | for (i = 0; i < n; ++i) | |
2776 | if (!EQ (v[i], overlay) | |
2777 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2778 | !NILP (tem))) | |
2779 | break; | |
2780 | ||
2781 | return i < n; | |
2782 | } | |
2783 | ||
2784 | ||
74514898 | 2785 | \f |
fc04fa47 KH |
2786 | /* Fast function to just test if we're at an overlay boundary. */ |
2787 | int | |
2788 | overlay_touches_p (pos) | |
2789 | int pos; | |
2790 | { | |
2410d73a SM |
2791 | Lisp_Object overlay; |
2792 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2793 | |
2410d73a | 2794 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2795 | { |
2796 | int endpos; | |
2797 | ||
2410d73a | 2798 | XSETMISC (overlay ,tail); |
fc04fa47 KH |
2799 | if (!GC_OVERLAYP (overlay)) |
2800 | abort (); | |
2801 | ||
2802 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2803 | if (endpos < pos) | |
2804 | break; | |
2805 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2806 | return 1; | |
2807 | } | |
2808 | ||
2410d73a | 2809 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2810 | { |
2811 | int startpos; | |
2812 | ||
2410d73a | 2813 | XSETMISC (overlay, tail); |
fc04fa47 KH |
2814 | if (!GC_OVERLAYP (overlay)) |
2815 | abort (); | |
2816 | ||
2817 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2818 | if (pos < startpos) | |
2819 | break; | |
2820 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2821 | return 1; | |
2822 | } | |
2823 | return 0; | |
2824 | } | |
2eec3b4e | 2825 | \f |
5985d248 KH |
2826 | struct sortvec |
2827 | { | |
2828 | Lisp_Object overlay; | |
2829 | int beg, end; | |
2830 | int priority; | |
2831 | }; | |
2832 | ||
2833 | static int | |
dfcf069d AS |
2834 | compare_overlays (v1, v2) |
2835 | const void *v1, *v2; | |
5985d248 | 2836 | { |
dfcf069d AS |
2837 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2838 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2839 | if (s1->priority != s2->priority) |
2840 | return s1->priority - s2->priority; | |
2841 | if (s1->beg != s2->beg) | |
2842 | return s1->beg - s2->beg; | |
2843 | if (s1->end != s2->end) | |
2844 | return s2->end - s1->end; | |
2845 | return 0; | |
2846 | } | |
2847 | ||
2848 | /* Sort an array of overlays by priority. The array is modified in place. | |
2849 | The return value is the new size; this may be smaller than the original | |
2850 | size if some of the overlays were invalid or were window-specific. */ | |
2851 | int | |
2852 | sort_overlays (overlay_vec, noverlays, w) | |
2853 | Lisp_Object *overlay_vec; | |
2854 | int noverlays; | |
2855 | struct window *w; | |
2856 | { | |
2857 | int i, j; | |
2858 | struct sortvec *sortvec; | |
2859 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2860 | ||
2861 | /* Put the valid and relevant overlays into sortvec. */ | |
2862 | ||
2863 | for (i = 0, j = 0; i < noverlays; i++) | |
2864 | { | |
0fa767e7 | 2865 | Lisp_Object tem; |
c99fc30f | 2866 | Lisp_Object overlay; |
5985d248 | 2867 | |
c99fc30f | 2868 | overlay = overlay_vec[i]; |
5985d248 KH |
2869 | if (OVERLAY_VALID (overlay) |
2870 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2871 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2872 | { | |
0fa767e7 KH |
2873 | /* If we're interested in a specific window, then ignore |
2874 | overlays that are limited to some other window. */ | |
2875 | if (w) | |
5985d248 | 2876 | { |
0fa767e7 KH |
2877 | Lisp_Object window; |
2878 | ||
2879 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2880 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2881 | continue; |
5985d248 | 2882 | } |
0fa767e7 KH |
2883 | |
2884 | /* This overlay is good and counts: put it into sortvec. */ | |
2885 | sortvec[j].overlay = overlay; | |
2886 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2887 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2888 | tem = Foverlay_get (overlay, Qpriority); | |
2889 | if (INTEGERP (tem)) | |
2890 | sortvec[j].priority = XINT (tem); | |
2891 | else | |
2892 | sortvec[j].priority = 0; | |
2893 | j++; | |
5985d248 KH |
2894 | } |
2895 | } | |
2896 | noverlays = j; | |
2897 | ||
2898 | /* Sort the overlays into the proper order: increasing priority. */ | |
2899 | ||
2900 | if (noverlays > 1) | |
2901 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2902 | ||
2903 | for (i = 0; i < noverlays; i++) | |
2904 | overlay_vec[i] = sortvec[i].overlay; | |
2905 | return (noverlays); | |
2906 | } | |
2907 | \f | |
bbbe9545 KH |
2908 | struct sortstr |
2909 | { | |
cb26008f | 2910 | Lisp_Object string, string2; |
bbbe9545 KH |
2911 | int size; |
2912 | int priority; | |
2913 | }; | |
2914 | ||
e8185fa8 KH |
2915 | struct sortstrlist |
2916 | { | |
2917 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2918 | int size; /* Allocated length of that array. */ | |
2919 | int used; /* How much of the array is currently in use. */ | |
2920 | int bytes; /* Total length of the strings in buf. */ | |
2921 | }; | |
2922 | ||
2923 | /* Buffers for storing information about the overlays touching a given | |
2924 | position. These could be automatic variables in overlay_strings, but | |
2925 | it's more efficient to hold onto the memory instead of repeatedly | |
2926 | allocating and freeing it. */ | |
2927 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2928 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2929 | |
2930 | /* Allocated length of overlay_str_buf. */ | |
2931 | static int overlay_str_len; | |
2932 | ||
bbbe9545 KH |
2933 | /* A comparison function suitable for passing to qsort. */ |
2934 | static int | |
2935 | cmp_for_strings (as1, as2) | |
2936 | char *as1, *as2; | |
2937 | { | |
2938 | struct sortstr *s1 = (struct sortstr *)as1; | |
2939 | struct sortstr *s2 = (struct sortstr *)as2; | |
2940 | if (s1->size != s2->size) | |
2941 | return s2->size - s1->size; | |
2942 | if (s1->priority != s2->priority) | |
2943 | return s1->priority - s2->priority; | |
2944 | return 0; | |
2945 | } | |
2946 | ||
e8185fa8 | 2947 | static void |
cb26008f | 2948 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2949 | struct sortstrlist *ssl; |
cb26008f | 2950 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2951 | int size; |
2952 | { | |
43d27a72 RS |
2953 | int nbytes; |
2954 | ||
e8185fa8 KH |
2955 | if (ssl->used == ssl->size) |
2956 | { | |
2957 | if (ssl->buf) | |
2958 | ssl->size *= 2; | |
2959 | else | |
2960 | ssl->size = 5; | |
2961 | ssl->buf = ((struct sortstr *) | |
2962 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2963 | } | |
2964 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2965 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2966 | ssl->buf[ssl->used].size = size; |
2967 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2968 | ssl->used++; | |
43d27a72 RS |
2969 | |
2970 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2971 | nbytes = SCHARS (str); |
43d27a72 | 2972 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2973 | nbytes = count_size_as_multibyte (SDATA (str), |
2974 | SBYTES (str)); | |
43d27a72 | 2975 | else |
d5db4077 | 2976 | nbytes = SBYTES (str); |
43d27a72 RS |
2977 | |
2978 | ssl->bytes += nbytes; | |
2979 | ||
cb26008f | 2980 | if (STRINGP (str2)) |
43d27a72 RS |
2981 | { |
2982 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2983 | nbytes = SCHARS (str2); |
43d27a72 | 2984 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2985 | nbytes = count_size_as_multibyte (SDATA (str2), |
2986 | SBYTES (str2)); | |
43d27a72 | 2987 | else |
d5db4077 | 2988 | nbytes = SBYTES (str2); |
43d27a72 RS |
2989 | |
2990 | ssl->bytes += nbytes; | |
2991 | } | |
e8185fa8 | 2992 | } |
bbbe9545 KH |
2993 | |
2994 | /* Return the concatenation of the strings associated with overlays that | |
2995 | begin or end at POS, ignoring overlays that are specific to a window | |
2996 | other than W. The strings are concatenated in the appropriate order: | |
2997 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2998 | lower. Normally all of the after-strings come first, but zero-sized |
2999 | overlays have their after-strings ride along with the before-strings | |
3000 | because it would look strange to print them inside-out. | |
3001 | ||
3002 | Returns the string length, and stores the contents indirectly through | |
3003 | PSTR, if that variable is non-null. The string may be overwritten by | |
3004 | subsequent calls. */ | |
6b5d3b89 | 3005 | |
bbbe9545 KH |
3006 | int |
3007 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3008 | EMACS_INT pos; |
bbbe9545 | 3009 | struct window *w; |
6b5d3b89 | 3010 | unsigned char **pstr; |
bbbe9545 | 3011 | { |
2410d73a SM |
3012 | Lisp_Object overlay, window, str; |
3013 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3014 | int startpos, endpos; |
43d27a72 | 3015 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3016 | |
e8185fa8 KH |
3017 | overlay_heads.used = overlay_heads.bytes = 0; |
3018 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3019 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3020 | { |
2410d73a | 3021 | XSETMISC (overlay, ov); |
c2d5b10f | 3022 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3023 | |
3024 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3025 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3026 | if (endpos < pos) | |
3027 | break; | |
3028 | if (endpos != pos && startpos != pos) | |
3029 | continue; | |
3030 | window = Foverlay_get (overlay, Qwindow); | |
3031 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3032 | continue; | |
e8185fa8 KH |
3033 | if (startpos == pos |
3034 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3035 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3036 | (startpos == endpos |
3037 | ? Foverlay_get (overlay, Qafter_string) | |
3038 | : Qnil), | |
3039 | Foverlay_get (overlay, Qpriority), | |
3040 | endpos - startpos); | |
3041 | else if (endpos == pos | |
3042 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3043 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3044 | Foverlay_get (overlay, Qpriority), |
3045 | endpos - startpos); | |
bbbe9545 | 3046 | } |
2410d73a | 3047 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3048 | { |
2410d73a SM |
3049 | XSETMISC (overlay, ov); |
3050 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3051 | |
3052 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3053 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3054 | if (startpos > pos) | |
3055 | break; | |
e8185fa8 KH |
3056 | if (endpos != pos && startpos != pos) |
3057 | continue; | |
3058 | window = Foverlay_get (overlay, Qwindow); | |
3059 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3060 | continue; | |
e8185fa8 KH |
3061 | if (startpos == pos |
3062 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3063 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3064 | (startpos == endpos |
3065 | ? Foverlay_get (overlay, Qafter_string) | |
3066 | : Qnil), | |
3067 | Foverlay_get (overlay, Qpriority), | |
3068 | endpos - startpos); | |
3069 | else if (endpos == pos | |
3070 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3071 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3072 | Foverlay_get (overlay, Qpriority), |
3073 | endpos - startpos); | |
bbbe9545 | 3074 | } |
e8185fa8 KH |
3075 | if (overlay_tails.used > 1) |
3076 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3077 | cmp_for_strings); | |
3078 | if (overlay_heads.used > 1) | |
3079 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3080 | cmp_for_strings); | |
3081 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3082 | { |
e8185fa8 | 3083 | Lisp_Object tem; |
bbbe9545 | 3084 | int i; |
9f4d7cde | 3085 | unsigned char *p; |
e8185fa8 | 3086 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3087 | |
3088 | if (total > overlay_str_len) | |
9f4d7cde RS |
3089 | { |
3090 | overlay_str_len = total; | |
3091 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3092 | total); | |
3093 | } | |
bbbe9545 | 3094 | p = overlay_str_buf; |
e8185fa8 | 3095 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3096 | { |
43d27a72 | 3097 | int nbytes; |
e8185fa8 | 3098 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3099 | nbytes = copy_text (SDATA (tem), p, |
3100 | SBYTES (tem), | |
43d27a72 RS |
3101 | STRING_MULTIBYTE (tem), multibyte); |
3102 | p += nbytes; | |
bbbe9545 | 3103 | } |
e8185fa8 | 3104 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3105 | { |
43d27a72 | 3106 | int nbytes; |
e8185fa8 | 3107 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3108 | nbytes = copy_text (SDATA (tem), p, |
3109 | SBYTES (tem), | |
43d27a72 RS |
3110 | STRING_MULTIBYTE (tem), multibyte); |
3111 | p += nbytes; | |
cb26008f KH |
3112 | tem = overlay_heads.buf[i].string2; |
3113 | if (STRINGP (tem)) | |
3114 | { | |
d5db4077 KR |
3115 | nbytes = copy_text (SDATA (tem), p, |
3116 | SBYTES (tem), | |
43d27a72 RS |
3117 | STRING_MULTIBYTE (tem), multibyte); |
3118 | p += nbytes; | |
cb26008f | 3119 | } |
bbbe9545 | 3120 | } |
cb26008f KH |
3121 | if (p != overlay_str_buf + total) |
3122 | abort (); | |
bbbe9545 KH |
3123 | if (pstr) |
3124 | *pstr = overlay_str_buf; | |
e8185fa8 | 3125 | return total; |
bbbe9545 | 3126 | } |
e8185fa8 | 3127 | return 0; |
bbbe9545 KH |
3128 | } |
3129 | \f | |
5c4f68f1 | 3130 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3131 | |
2eec3b4e | 3132 | void |
5c4f68f1 JB |
3133 | recenter_overlay_lists (buf, pos) |
3134 | struct buffer *buf; | |
c2d5b10f | 3135 | EMACS_INT pos; |
2eec3b4e | 3136 | { |
2410d73a SM |
3137 | Lisp_Object overlay, beg, end; |
3138 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3139 | |
3140 | /* See if anything in overlays_before should move to overlays_after. */ | |
3141 | ||
3142 | /* We don't strictly need prev in this loop; it should always be nil. | |
3143 | But we use it for symmetry and in case that should cease to be true | |
3144 | with some future change. */ | |
2410d73a SM |
3145 | prev = NULL; |
3146 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3147 | { |
2410d73a SM |
3148 | next = tail->next; |
3149 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3150 | |
3151 | /* If the overlay is not valid, get rid of it. */ | |
3152 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3153 | #if 1 |
3154 | abort (); | |
3155 | #else | |
2eec3b4e RS |
3156 | { |
3157 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3158 | if (!NILP (prev)) | |
7539e11f | 3159 | XCDR (prev) = next; |
2eec3b4e | 3160 | else |
5c4f68f1 | 3161 | buf->overlays_before = next; |
2eec3b4e RS |
3162 | tail = prev; |
3163 | continue; | |
3164 | } | |
52f8ec73 | 3165 | #endif |
1ab256cb | 3166 | |
2eec3b4e RS |
3167 | beg = OVERLAY_START (overlay); |
3168 | end = OVERLAY_END (overlay); | |
1ab256cb | 3169 | |
2eec3b4e | 3170 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3171 | { |
2eec3b4e RS |
3172 | /* OVERLAY needs to be moved. */ |
3173 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3174 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3175 | |
3176 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3177 | if (prev) |
3178 | prev->next = next; | |
2eec3b4e | 3179 | else |
5c4f68f1 | 3180 | buf->overlays_before = next; |
2eec3b4e RS |
3181 | |
3182 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3183 | other_prev = NULL; |
3184 | for (other = buf->overlays_after; other; | |
3185 | other_prev = other, other = other->next) | |
1ab256cb | 3186 | { |
6af718a4 | 3187 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3188 | |
2410d73a SM |
3189 | XSETMISC (otheroverlay, other); |
3190 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3191 | |
3192 | otherbeg = OVERLAY_START (otheroverlay); | |
3193 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3194 | break; | |
1ab256cb | 3195 | } |
2eec3b4e RS |
3196 | |
3197 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3198 | tail->next = other; |
3199 | if (other_prev) | |
3200 | other_prev->next = tail; | |
1ab256cb | 3201 | else |
5c4f68f1 | 3202 | buf->overlays_after = tail; |
2eec3b4e | 3203 | tail = prev; |
1ab256cb | 3204 | } |
2eec3b4e RS |
3205 | else |
3206 | /* We've reached the things that should stay in overlays_before. | |
3207 | All the rest of overlays_before must end even earlier, | |
3208 | so stop now. */ | |
3209 | break; | |
3210 | } | |
3211 | ||
3212 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3213 | prev = NULL; |
3214 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3215 | { |
2410d73a SM |
3216 | next = tail->next; |
3217 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3218 | |
3219 | /* If the overlay is not valid, get rid of it. */ | |
3220 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3221 | #if 1 |
3222 | abort (); | |
3223 | #else | |
2eec3b4e RS |
3224 | { |
3225 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3226 | if (!NILP (prev)) | |
7539e11f | 3227 | XCDR (prev) = next; |
2eec3b4e | 3228 | else |
5c4f68f1 | 3229 | buf->overlays_after = next; |
2eec3b4e RS |
3230 | tail = prev; |
3231 | continue; | |
3232 | } | |
52f8ec73 | 3233 | #endif |
2eec3b4e RS |
3234 | |
3235 | beg = OVERLAY_START (overlay); | |
3236 | end = OVERLAY_END (overlay); | |
3237 | ||
3238 | /* Stop looking, when we know that nothing further | |
3239 | can possibly end before POS. */ | |
3240 | if (OVERLAY_POSITION (beg) > pos) | |
3241 | break; | |
3242 | ||
3243 | if (OVERLAY_POSITION (end) <= pos) | |
3244 | { | |
3245 | /* OVERLAY needs to be moved. */ | |
3246 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3247 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3248 | |
3249 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3250 | if (prev) |
3251 | prev->next = next; | |
2eec3b4e | 3252 | else |
5c4f68f1 | 3253 | buf->overlays_after = next; |
2eec3b4e RS |
3254 | |
3255 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3256 | other_prev = NULL; |
3257 | for (other = buf->overlays_before; other; | |
3258 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3259 | { |
3260 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3261 | |
2410d73a SM |
3262 | XSETMISC (otheroverlay, other); |
3263 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3264 | |
3265 | otherend = OVERLAY_END (otheroverlay); | |
3266 | if (OVERLAY_POSITION (otherend) <= where) | |
3267 | break; | |
3268 | } | |
3269 | ||
3270 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3271 | tail->next = other; |
3272 | if (other_prev) | |
3273 | other_prev->next = tail; | |
2eec3b4e | 3274 | else |
5c4f68f1 | 3275 | buf->overlays_before = tail; |
2eec3b4e RS |
3276 | tail = prev; |
3277 | } | |
3278 | } | |
3279 | ||
c2d5b10f | 3280 | buf->overlay_center = pos; |
2eec3b4e | 3281 | } |
2b1bdf65 | 3282 | |
423cdb46 KH |
3283 | void |
3284 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3285 | EMACS_INT pos; |
3286 | EMACS_INT length; | |
423cdb46 KH |
3287 | { |
3288 | /* After an insertion, the lists are still sorted properly, | |
3289 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3290 | if (current_buffer->overlay_center >= pos) |
3291 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3292 | } |
3293 | ||
3294 | void | |
3295 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3296 | EMACS_INT pos; |
3297 | EMACS_INT length; | |
423cdb46 | 3298 | { |
c2d5b10f | 3299 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3300 | /* The deletion was to our right. No change needed; the before- and |
3301 | after-lists are still consistent. */ | |
3302 | ; | |
c2d5b10f | 3303 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3304 | /* The deletion was to our left. We need to adjust the center value |
3305 | to account for the change in position, but the lists are consistent | |
3306 | given the new value. */ | |
c2d5b10f | 3307 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3308 | else |
3309 | /* We're right in the middle. There might be things on the after-list | |
3310 | that now belong on the before-list. Recentering will move them, | |
3311 | and also update the center point. */ | |
3312 | recenter_overlay_lists (current_buffer, pos); | |
3313 | } | |
3314 | ||
2b1bdf65 KH |
3315 | /* Fix up overlays that were garbled as a result of permuting markers |
3316 | in the range START through END. Any overlay with at least one | |
3317 | endpoint in this range will need to be unlinked from the overlay | |
3318 | list and reinserted in its proper place. | |
3319 | Such an overlay might even have negative size at this point. | |
99a72bdf | 3320 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3321 | void |
abdb9b83 | 3322 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3323 | register int start, end; |
3324 | { | |
6af718a4 | 3325 | Lisp_Object overlay; |
2410d73a | 3326 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3327 | /* These are either nil, indicating that before_list or after_list |
3328 | should be assigned, or the cons cell the cdr of which should be | |
3329 | assigned. */ | |
2410d73a | 3330 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3331 | /* 'Parent', likewise, indicates a cons cell or |
3332 | current_buffer->overlays_before or overlays_after, depending | |
3333 | which loop we're in. */ | |
2410d73a | 3334 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3335 | int startpos, endpos; |
3336 | ||
3337 | /* This algorithm shifts links around instead of consing and GCing. | |
3338 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3339 | well-formed list except that its last element, the CDR of beforep |
3340 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3341 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3342 | that before_list isn't initialized, although it may look | |
3343 | strange. */ | |
2410d73a | 3344 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3345 | { |
2410d73a | 3346 | XSETMISC (overlay, tail); |
99a72bdf | 3347 | |
2b1bdf65 | 3348 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
99a72bdf MY |
3349 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3350 | ||
3351 | /* If the overlay is backwards, make it empty. */ | |
3352 | if (endpos < startpos) | |
3353 | { | |
3354 | startpos = endpos; | |
3355 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3356 | Qnil); | |
3357 | } | |
3358 | ||
2b1bdf65 KH |
3359 | if (endpos < start) |
3360 | break; | |
60ebfdf3 | 3361 | |
2b1bdf65 KH |
3362 | if (endpos < end |
3363 | || (startpos >= start && startpos < end)) | |
3364 | { | |
2b1bdf65 KH |
3365 | /* Add it to the end of the wrong list. Later on, |
3366 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3367 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3368 | { |
2410d73a | 3369 | if (!afterp) |
1138e742 KR |
3370 | after_list = tail; |
3371 | else | |
2410d73a | 3372 | afterp->next = tail; |
1138e742 | 3373 | afterp = tail; |
2b1bdf65 KH |
3374 | } |
3375 | else | |
3376 | { | |
2410d73a | 3377 | if (!beforep) |
1138e742 KR |
3378 | before_list = tail; |
3379 | else | |
2410d73a | 3380 | beforep->next = tail; |
1138e742 | 3381 | beforep = tail; |
2b1bdf65 | 3382 | } |
2410d73a SM |
3383 | if (!parent) |
3384 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3385 | else |
2410d73a SM |
3386 | parent->next = tail->next; |
3387 | tail = tail->next; | |
2b1bdf65 KH |
3388 | } |
3389 | else | |
2410d73a | 3390 | parent = tail, tail = parent->next; |
2b1bdf65 | 3391 | } |
2410d73a | 3392 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3393 | { |
2410d73a | 3394 | XSETMISC (overlay, tail); |
99a72bdf | 3395 | |
2b1bdf65 | 3396 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
99a72bdf MY |
3397 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3398 | ||
3399 | /* If the overlay is backwards, make it empty. */ | |
3400 | if (endpos < startpos) | |
3401 | { | |
3402 | startpos = endpos; | |
3403 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3404 | Qnil); |
99a72bdf MY |
3405 | } |
3406 | ||
2b1bdf65 KH |
3407 | if (startpos >= end) |
3408 | break; | |
99a72bdf | 3409 | |
2b1bdf65 KH |
3410 | if (startpos >= start |
3411 | || (endpos >= start && endpos < end)) | |
3412 | { | |
c2d5b10f | 3413 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3414 | { |
2410d73a | 3415 | if (!afterp) |
1138e742 KR |
3416 | after_list = tail; |
3417 | else | |
2410d73a | 3418 | afterp->next = tail; |
1138e742 | 3419 | afterp = tail; |
2b1bdf65 KH |
3420 | } |
3421 | else | |
3422 | { | |
2410d73a | 3423 | if (!beforep) |
1138e742 KR |
3424 | before_list = tail; |
3425 | else | |
2410d73a | 3426 | beforep->next = tail; |
1138e742 | 3427 | beforep = tail; |
2b1bdf65 | 3428 | } |
2410d73a SM |
3429 | if (!parent) |
3430 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3431 | else |
2410d73a SM |
3432 | parent->next = tail->next; |
3433 | tail = tail->next; | |
2b1bdf65 KH |
3434 | } |
3435 | else | |
2410d73a | 3436 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3437 | } |
3438 | ||
3439 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3440 | and let the recenter function make it sane again. */ | |
2410d73a | 3441 | if (beforep) |
1138e742 | 3442 | { |
2410d73a | 3443 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3444 | current_buffer->overlays_before = before_list; |
3445 | } | |
c2d5b10f | 3446 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3447 | |
2410d73a | 3448 | if (afterp) |
1138e742 | 3449 | { |
2410d73a | 3450 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3451 | current_buffer->overlays_after = after_list; |
3452 | } | |
c2d5b10f | 3453 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3454 | } |
3b06f880 KH |
3455 | |
3456 | /* We have two types of overlay: the one whose ending marker is | |
3457 | after-insertion-marker (this is the usual case) and the one whose | |
3458 | ending marker is before-insertion-marker. When `overlays_before' | |
3459 | contains overlays of the latter type and the former type in this | |
3460 | order and both overlays end at inserting position, inserting a text | |
3461 | increases only the ending marker of the latter type, which results | |
3462 | in incorrect ordering of `overlays_before'. | |
3463 | ||
3464 | This function fixes ordering of overlays in the slot | |
3465 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3466 | was at PREV, and now is at POS. */ | |
3467 | ||
01136e9b | 3468 | void |
3b06f880 KH |
3469 | fix_overlays_before (bp, prev, pos) |
3470 | struct buffer *bp; | |
c2d5b10f | 3471 | EMACS_INT prev, pos; |
3b06f880 | 3472 | { |
2410d73a SM |
3473 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3474 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3475 | Lisp_Object tem; | |
c2d5b10f | 3476 | EMACS_INT end; |
3b06f880 KH |
3477 | |
3478 | /* After the insertion, the several overlays may be in incorrect | |
3479 | order. The possibility is that, in the list `overlays_before', | |
3480 | an overlay which ends at POS appears after an overlay which ends | |
3481 | at PREV. Since POS is greater than PREV, we must fix the | |
3482 | ordering of these overlays, by moving overlays ends at POS before | |
3483 | the overlays ends at PREV. */ | |
3484 | ||
3485 | /* At first, find a place where disordered overlays should be linked | |
3486 | in. It is where an overlay which end before POS exists. (i.e. an | |
3487 | overlay whose ending marker is after-insertion-marker if disorder | |
3488 | exists). */ | |
2410d73a SM |
3489 | while (tail |
3490 | && (XSETMISC (tem, tail), | |
3491 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3492 | { |
3493 | parent = tail; | |
2410d73a | 3494 | tail = tail->next; |
1138e742 | 3495 | } |
3b06f880 KH |
3496 | |
3497 | /* If we don't find such an overlay, | |
3498 | or the found one ends before PREV, | |
3499 | or the found one is the last one in the list, | |
3500 | we don't have to fix anything. */ | |
f93ad4cf | 3501 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3502 | return; |
3503 | ||
1138e742 KR |
3504 | right_pair = parent; |
3505 | parent = tail; | |
2410d73a | 3506 | tail = tail->next; |
3b06f880 | 3507 | |
1138e742 | 3508 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3509 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3510 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3511 | we found an overlay which ends before PREV, the remaining | |
3512 | overlays are in correct order. */ | |
2410d73a | 3513 | while (tail) |
3b06f880 | 3514 | { |
2410d73a SM |
3515 | XSETMISC (tem, tail); |
3516 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3517 | |
3518 | if (end == pos) | |
3519 | { /* This overlay is disordered. */ | |
2410d73a | 3520 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3521 | |
3522 | /* Unlink the found overlay. */ | |
2410d73a SM |
3523 | tail = found->next; |
3524 | parent->next = tail; | |
1138e742 KR |
3525 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3526 | and link it into the right place. */ | |
2410d73a | 3527 | if (!right_pair) |
1138e742 | 3528 | { |
2410d73a | 3529 | found->next = bp->overlays_before; |
1138e742 KR |
3530 | bp->overlays_before = found; |
3531 | } | |
3532 | else | |
3533 | { | |
2410d73a SM |
3534 | found->next = right_pair->next; |
3535 | right_pair->next = found; | |
1138e742 | 3536 | } |
3b06f880 KH |
3537 | } |
3538 | else if (end == prev) | |
1138e742 KR |
3539 | { |
3540 | parent = tail; | |
2410d73a | 3541 | tail = tail->next; |
1138e742 | 3542 | } |
3b06f880 KH |
3543 | else /* No more disordered overlay. */ |
3544 | break; | |
3545 | } | |
3546 | } | |
2eec3b4e | 3547 | \f |
52f8ec73 | 3548 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3549 | doc: /* Return t if OBJECT is an overlay. */) |
3550 | (object) | |
52f8ec73 JB |
3551 | Lisp_Object object; |
3552 | { | |
3553 | return (OVERLAYP (object) ? Qt : Qnil); | |
3554 | } | |
3555 | ||
acac2700 | 3556 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3557 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3558 | If omitted, BUFFER defaults to the current buffer. |
3559 | BEG and END may be integers or markers. | |
3560 | The fourth arg FRONT-ADVANCE, if non-nil, makes the | |
3561 | front delimiter advance when text is inserted there. | |
3562 | The fifth arg REAR-ADVANCE, if non-nil, makes the | |
7ee72033 MB |
3563 | rear delimiter advance when text is inserted there. */) |
3564 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3565 | Lisp_Object beg, end, buffer; |
acac2700 | 3566 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3567 | { |
3568 | Lisp_Object overlay; | |
5c4f68f1 | 3569 | struct buffer *b; |
2eec3b4e | 3570 | |
5c4f68f1 | 3571 | if (NILP (buffer)) |
67180c6a | 3572 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3573 | else |
b7826503 | 3574 | CHECK_BUFFER (buffer); |
883047b9 JB |
3575 | if (MARKERP (beg) |
3576 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3577 | error ("Marker points into wrong buffer"); | |
3578 | if (MARKERP (end) | |
3579 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3580 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3581 | |
b7826503 PJ |
3582 | CHECK_NUMBER_COERCE_MARKER (beg); |
3583 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3584 | |
883047b9 | 3585 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3586 | { |
c99fc30f KH |
3587 | Lisp_Object temp; |
3588 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3589 | } |
883047b9 JB |
3590 | |
3591 | b = XBUFFER (buffer); | |
3592 | ||
3593 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3594 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3595 | |
acac2700 RS |
3596 | if (!NILP (front_advance)) |
3597 | XMARKER (beg)->insertion_type = 1; | |
3598 | if (!NILP (rear_advance)) | |
3599 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3600 | |
48e2e3ba | 3601 | overlay = allocate_misc (); |
89ca3e1b | 3602 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3603 | XOVERLAY (overlay)->start = beg; |
3604 | XOVERLAY (overlay)->end = end; | |
3605 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3606 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3607 | |
177c0ea7 | 3608 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3609 | end = OVERLAY_END (overlay); |
c2d5b10f | 3610 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3611 | { |
3612 | if (b->overlays_after) | |
3613 | XOVERLAY (overlay)->next = b->overlays_after; | |
3614 | b->overlays_after = XOVERLAY (overlay); | |
3615 | } | |
2eec3b4e | 3616 | else |
2410d73a SM |
3617 | { |
3618 | if (b->overlays_before) | |
3619 | XOVERLAY (overlay)->next = b->overlays_before; | |
3620 | b->overlays_before = XOVERLAY (overlay); | |
3621 | } | |
2eec3b4e RS |
3622 | |
3623 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3624 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3625 | |
b61982dd JB |
3626 | /* We don't need to redisplay the region covered by the overlay, because |
3627 | the overlay has no properties at the moment. */ | |
3628 | ||
2eec3b4e RS |
3629 | return overlay; |
3630 | } | |
876aa27c RS |
3631 | \f |
3632 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3633 | ||
3634 | static void | |
3635 | modify_overlay (buf, start, end) | |
3636 | struct buffer *buf; | |
c2d5b10f | 3637 | EMACS_INT start, end; |
876aa27c | 3638 | { |
876aa27c RS |
3639 | if (start > end) |
3640 | { | |
3641 | int temp = start; | |
26f545d7 GM |
3642 | start = end; |
3643 | end = temp; | |
876aa27c RS |
3644 | } |
3645 | ||
481b5054 | 3646 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3647 | |
876aa27c RS |
3648 | /* If this is a buffer not in the selected window, |
3649 | we must do other windows. */ | |
3650 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3651 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3652 | /* If multiple windows show this buffer, we must do other windows. */ |
3653 | else if (buffer_shared > 1) | |
3654 | windows_or_buffers_changed = 1; | |
876aa27c | 3655 | |
d8b9150f | 3656 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3657 | } |
2eec3b4e | 3658 | |
018ba359 | 3659 | \f |
2e34157c RS |
3660 | Lisp_Object Fdelete_overlay (); |
3661 | ||
2410d73a SM |
3662 | static struct Lisp_Overlay * |
3663 | unchain_overlay (list, overlay) | |
3664 | struct Lisp_Overlay *list, *overlay; | |
3665 | { | |
3666 | struct Lisp_Overlay *tmp, *prev; | |
3667 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3668 | if (tmp == overlay) | |
3669 | { | |
3670 | if (prev) | |
3671 | prev->next = tmp->next; | |
3672 | else | |
3673 | list = tmp->next; | |
3674 | overlay->next = NULL; | |
3675 | break; | |
3676 | } | |
3677 | return list; | |
3678 | } | |
3679 | ||
5c4f68f1 | 3680 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3681 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3682 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3683 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3684 | buffer. */) |
3685 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3686 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3687 | { |
0a4469c9 RS |
3688 | struct buffer *b, *ob; |
3689 | Lisp_Object obuffer; | |
aed13378 | 3690 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3691 | |
b7826503 | 3692 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3693 | if (NILP (buffer)) |
3694 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3695 | if (NILP (buffer)) |
67180c6a | 3696 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3697 | CHECK_BUFFER (buffer); |
883047b9 JB |
3698 | |
3699 | if (MARKERP (beg) | |
3700 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3701 | error ("Marker points into wrong buffer"); | |
3702 | if (MARKERP (end) | |
3703 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3704 | error ("Marker points into wrong buffer"); | |
3705 | ||
b7826503 PJ |
3706 | CHECK_NUMBER_COERCE_MARKER (beg); |
3707 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3708 | |
9d7608b7 KH |
3709 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3710 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3711 | |
b61982dd JB |
3712 | if (XINT (beg) > XINT (end)) |
3713 | { | |
c99fc30f KH |
3714 | Lisp_Object temp; |
3715 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3716 | } |
3717 | ||
9d7608b7 KH |
3718 | specbind (Qinhibit_quit, Qt); |
3719 | ||
0a4469c9 | 3720 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3721 | b = XBUFFER (buffer); |
8801a864 | 3722 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3723 | |
c82ed728 | 3724 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3725 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3726 | { |
3727 | /* Redisplay where the overlay was. */ | |
3728 | if (!NILP (obuffer)) | |
3729 | { | |
2e34157c RS |
3730 | int o_beg; |
3731 | int o_end; | |
50760c4a | 3732 | |
80509f2f RS |
3733 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3734 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3735 | |
2e34157c | 3736 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3737 | } |
3738 | ||
3739 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3740 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3741 | } |
c82ed728 JB |
3742 | else |
3743 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3744 | { | |
2e34157c | 3745 | int o_beg, o_end; |
c82ed728 | 3746 | |
80509f2f RS |
3747 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3748 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3749 | |
2e34157c RS |
3750 | if (o_beg == XINT (beg)) |
3751 | modify_overlay (b, o_end, XINT (end)); | |
3752 | else if (o_end == XINT (end)) | |
3753 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3754 | else |
3755 | { | |
2e34157c RS |
3756 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3757 | if (XINT (end) > o_end) o_end = XINT (end); | |
3758 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3759 | } |
3760 | } | |
b61982dd | 3761 | |
0a4469c9 RS |
3762 | if (!NILP (obuffer)) |
3763 | { | |
2410d73a SM |
3764 | ob->overlays_before |
3765 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3766 | ob->overlays_after | |
3767 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3768 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3769 | } |
5c4f68f1 JB |
3770 | |
3771 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3772 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3773 | |
177c0ea7 | 3774 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3775 | end = OVERLAY_END (overlay); |
c2d5b10f | 3776 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3777 | { |
2f297815 GM |
3778 | XOVERLAY (overlay)->next = b->overlays_after; |
3779 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3780 | } |
2eec3b4e | 3781 | else |
2410d73a | 3782 | { |
2f297815 GM |
3783 | XOVERLAY (overlay)->next = b->overlays_before; |
3784 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3785 | } |
2eec3b4e RS |
3786 | |
3787 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3788 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3789 | |
0a4469c9 | 3790 | return unbind_to (count, overlay); |
2eec3b4e RS |
3791 | } |
3792 | ||
3793 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3794 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3795 | (overlay) | |
5c4f68f1 | 3796 | Lisp_Object overlay; |
2eec3b4e | 3797 | { |
0a4469c9 | 3798 | Lisp_Object buffer; |
5c4f68f1 | 3799 | struct buffer *b; |
aed13378 | 3800 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3801 | |
b7826503 | 3802 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3803 | |
0a4469c9 RS |
3804 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3805 | if (NILP (buffer)) | |
3806 | return Qnil; | |
3807 | ||
3808 | b = XBUFFER (buffer); | |
0a4469c9 | 3809 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3810 | |
2410d73a SM |
3811 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3812 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3813 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3814 | modify_overlay (b, |
8231a9aa RS |
3815 | marker_position (OVERLAY_START (overlay)), |
3816 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3817 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3818 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3819 | ||
e58c389d | 3820 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3821 | display optimizations for the affected buffer, on the basis that |
3822 | these strings may contain newlines. This is easier to do than to | |
3823 | check for that situation during redisplay. */ | |
3824 | if (!windows_or_buffers_changed | |
3825 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3826 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3827 | b->prevent_redisplay_optimizations_p = 1; | |
3828 | ||
0a4469c9 | 3829 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3830 | } |
3831 | \f | |
8ebafa8d JB |
3832 | /* Overlay dissection functions. */ |
3833 | ||
3834 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3835 | doc: /* Return the position at which OVERLAY starts. */) |
3836 | (overlay) | |
8ebafa8d JB |
3837 | Lisp_Object overlay; |
3838 | { | |
b7826503 | 3839 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3840 | |
3841 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3842 | } | |
3843 | ||
3844 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3845 | doc: /* Return the position at which OVERLAY ends. */) |
3846 | (overlay) | |
8ebafa8d JB |
3847 | Lisp_Object overlay; |
3848 | { | |
b7826503 | 3849 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3850 | |
3851 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3852 | } | |
3853 | ||
3854 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
7ee72033 MB |
3855 | doc: /* Return the buffer OVERLAY belongs to. */) |
3856 | (overlay) | |
8ebafa8d JB |
3857 | Lisp_Object overlay; |
3858 | { | |
b7826503 | 3859 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3860 | |
3861 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3862 | } | |
3863 | ||
3864 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3865 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3866 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3867 | OVERLAY. */) |
3868 | (overlay) | |
8ebafa8d JB |
3869 | Lisp_Object overlay; |
3870 | { | |
b7826503 | 3871 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3872 | |
48e2e3ba | 3873 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3874 | } |
3875 | ||
3876 | \f | |
2eec3b4e | 3877 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3878 | doc: /* Return a list of the overlays that contain position POS. */) |
3879 | (pos) | |
2eec3b4e RS |
3880 | Lisp_Object pos; |
3881 | { | |
3882 | int noverlays; | |
2eec3b4e RS |
3883 | Lisp_Object *overlay_vec; |
3884 | int len; | |
3885 | Lisp_Object result; | |
3886 | ||
b7826503 | 3887 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3888 | |
3889 | len = 10; | |
a9800ae8 | 3890 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3891 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3892 | ||
3893 | /* Put all the overlays we want in a vector in overlay_vec. | |
3894 | Store the length in len. */ | |
2a77a7d7 | 3895 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3896 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3897 | |
3898 | /* Make a list of them all. */ | |
3899 | result = Flist (noverlays, overlay_vec); | |
3900 | ||
9ac0d9e0 | 3901 | xfree (overlay_vec); |
2eec3b4e RS |
3902 | return result; |
3903 | } | |
3904 | ||
74514898 | 3905 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3906 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3907 | Overlap means that at least one character is contained within the overlay |
3908 | and also contained within the specified region. | |
3909 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3910 | or between BEG and END. */) |
3911 | (beg, end) | |
74514898 RS |
3912 | Lisp_Object beg, end; |
3913 | { | |
3914 | int noverlays; | |
3915 | Lisp_Object *overlay_vec; | |
3916 | int len; | |
3917 | Lisp_Object result; | |
3918 | ||
b7826503 PJ |
3919 | CHECK_NUMBER_COERCE_MARKER (beg); |
3920 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3921 | |
3922 | len = 10; | |
3923 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3924 | ||
3925 | /* Put all the overlays we want in a vector in overlay_vec. | |
3926 | Store the length in len. */ | |
3927 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3928 | (int *) 0, (int *) 0); | |
3929 | ||
3930 | /* Make a list of them all. */ | |
3931 | result = Flist (noverlays, overlay_vec); | |
3932 | ||
3933 | xfree (overlay_vec); | |
3934 | return result; | |
3935 | } | |
3936 | ||
2eec3b4e | 3937 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3938 | 1, 1, 0, |
7ee72033 MB |
3939 | doc: /* Return the next position after POS where an overlay starts or ends. |
3940 | If there are no more overlay boundaries after POS, return (point-max). */) | |
3941 | (pos) | |
2eec3b4e RS |
3942 | Lisp_Object pos; |
3943 | { | |
3944 | int noverlays; | |
3945 | int endpos; | |
3946 | Lisp_Object *overlay_vec; | |
3947 | int len; | |
2eec3b4e RS |
3948 | int i; |
3949 | ||
b7826503 | 3950 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3951 | |
3952 | len = 10; | |
3953 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3954 | ||
3955 | /* Put all the overlays we want in a vector in overlay_vec. | |
3956 | Store the length in len. | |
3957 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3958 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3959 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3960 | |
3961 | /* If any of these overlays ends before endpos, | |
3962 | use its ending point instead. */ | |
3963 | for (i = 0; i < noverlays; i++) | |
3964 | { | |
3965 | Lisp_Object oend; | |
3966 | int oendpos; | |
3967 | ||
3968 | oend = OVERLAY_END (overlay_vec[i]); | |
3969 | oendpos = OVERLAY_POSITION (oend); | |
3970 | if (oendpos < endpos) | |
3971 | endpos = oendpos; | |
1ab256cb RM |
3972 | } |
3973 | ||
9ac0d9e0 | 3974 | xfree (overlay_vec); |
2eec3b4e RS |
3975 | return make_number (endpos); |
3976 | } | |
239c932b RS |
3977 | |
3978 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3979 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 MB |
3980 | doc: /* Return the previous position before POS where an overlay starts or ends. |
3981 | If there are no more overlay boundaries before POS, return (point-min). */) | |
3982 | (pos) | |
239c932b RS |
3983 | Lisp_Object pos; |
3984 | { | |
3985 | int noverlays; | |
3986 | int prevpos; | |
3987 | Lisp_Object *overlay_vec; | |
3988 | int len; | |
239c932b | 3989 | |
b7826503 | 3990 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3991 | |
624bbdc4 RS |
3992 | /* At beginning of buffer, we know the answer; |
3993 | avoid bug subtracting 1 below. */ | |
3994 | if (XINT (pos) == BEGV) | |
3995 | return pos; | |
3996 | ||
017f0539 GM |
3997 | len = 10; |
3998 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3999 | ||
239c932b RS |
4000 | /* Put all the overlays we want in a vector in overlay_vec. |
4001 | Store the length in len. | |
daa1c109 | 4002 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4003 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4004 | (int *) 0, &prevpos, 1); |
239c932b | 4005 | |
239c932b RS |
4006 | xfree (overlay_vec); |
4007 | return make_number (prevpos); | |
4008 | } | |
2eec3b4e RS |
4009 | \f |
4010 | /* These functions are for debugging overlays. */ | |
4011 | ||
4012 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4013 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4014 | The car has all the overlays before the overlay center; |
4015 | the cdr has all the overlays after the overlay center. | |
4016 | Recentering overlays moves overlays between these lists. | |
4017 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4018 | However, the overlays you get are the real objects that the buffer uses. */) |
4019 | () | |
2eec3b4e | 4020 | { |
2410d73a SM |
4021 | struct Lisp_Overlay *ol; |
4022 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4023 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4024 | { | |
4025 | XSETMISC (tmp, ol); | |
4026 | before = Fcons (tmp, before); | |
4027 | } | |
4028 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4029 | { | |
4030 | XSETMISC (tmp, ol); | |
4031 | after = Fcons (tmp, after); | |
4032 | } | |
4033 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4034 | } |
4035 | ||
4036 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4037 | doc: /* Recenter the overlays of the current buffer around position POS. |
4038 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4039 | for positions far away from POS). */) | |
7ee72033 | 4040 | (pos) |
2eec3b4e RS |
4041 | Lisp_Object pos; |
4042 | { | |
b7826503 | 4043 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4044 | |
5c4f68f1 | 4045 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4046 | return Qnil; |
4047 | } | |
4048 | \f | |
4049 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4050 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4051 | (overlay, prop) | |
2eec3b4e RS |
4052 | Lisp_Object overlay, prop; |
4053 | { | |
b7826503 | 4054 | CHECK_OVERLAY (overlay); |
9a593927 | 4055 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4056 | } |
4057 | ||
4058 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4059 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4060 | (overlay, prop, value) | |
2eec3b4e RS |
4061 | Lisp_Object overlay, prop, value; |
4062 | { | |
48e2e3ba | 4063 | Lisp_Object tail, buffer; |
9d7608b7 | 4064 | int changed; |
2eec3b4e | 4065 | |
b7826503 | 4066 | CHECK_OVERLAY (overlay); |
b61982dd | 4067 | |
274a9425 RS |
4068 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4069 | ||
48e2e3ba | 4070 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4071 | CONSP (tail) && CONSP (XCDR (tail)); |
4072 | tail = XCDR (XCDR (tail))) | |
4073 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4074 | { |
7539e11f | 4075 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4076 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4077 | goto found; |
274a9425 | 4078 | } |
9d7608b7 KH |
4079 | /* It wasn't in the list, so add it to the front. */ |
4080 | changed = !NILP (value); | |
48e2e3ba KH |
4081 | XOVERLAY (overlay)->plist |
4082 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4083 | found: |
4084 | if (! NILP (buffer)) | |
4085 | { | |
4086 | if (changed) | |
876aa27c | 4087 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4088 | marker_position (OVERLAY_START (overlay)), |
4089 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4090 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4091 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4092 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4093 | Fdelete_overlay (overlay); | |
4094 | } | |
2eec3b4e | 4095 | return value; |
1ab256cb RM |
4096 | } |
4097 | \f | |
9115729e KH |
4098 | /* Subroutine of report_overlay_modification. */ |
4099 | ||
4100 | /* Lisp vector holding overlay hook functions to call. | |
4101 | Vector elements come in pairs. | |
4102 | Each even-index element is a list of hook functions. | |
4103 | The following odd-index element is the overlay they came from. | |
4104 | ||
4105 | Before the buffer change, we fill in this vector | |
4106 | as we call overlay hook functions. | |
4107 | After the buffer change, we get the functions to call from this vector. | |
4108 | This way we always call the same functions before and after the change. */ | |
4109 | static Lisp_Object last_overlay_modification_hooks; | |
4110 | ||
4111 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4112 | static int last_overlay_modification_hooks_used; | |
4113 | ||
4114 | /* Add one functionlist/overlay pair | |
4115 | to the end of last_overlay_modification_hooks. */ | |
4116 | ||
4117 | static void | |
4118 | add_overlay_mod_hooklist (functionlist, overlay) | |
4119 | Lisp_Object functionlist, overlay; | |
4120 | { | |
4121 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4122 | ||
4123 | if (last_overlay_modification_hooks_used == oldsize) | |
4124 | { | |
4125 | Lisp_Object old; | |
4126 | old = last_overlay_modification_hooks; | |
4127 | last_overlay_modification_hooks | |
4128 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4129 | bcopy (XVECTOR (old)->contents, |
4130 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4131 | sizeof (Lisp_Object) * oldsize); |
4132 | } | |
2410d73a SM |
4133 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = functionlist; |
4134 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = overlay; | |
9115729e KH |
4135 | } |
4136 | \f | |
173f2a64 RS |
4137 | /* Run the modification-hooks of overlays that include |
4138 | any part of the text in START to END. | |
9115729e KH |
4139 | If this change is an insertion, also |
4140 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4141 | and the insert-after-hooks of overlay ending at START. |
4142 | ||
4143 | This is called both before and after the modification. | |
4144 | AFTER is nonzero when we call after the modification. | |
4145 | ||
9115729e KH |
4146 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4147 | When AFTER is nonzero, they are the start position, | |
4148 | the position after the inserted new text, | |
4149 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4150 | |
4151 | void | |
930a9140 | 4152 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4153 | Lisp_Object start, end; |
930a9140 RS |
4154 | int after; |
4155 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4156 | { |
2410d73a SM |
4157 | Lisp_Object prop, overlay; |
4158 | struct Lisp_Overlay *tail; | |
9115729e KH |
4159 | /* 1 if this change is an insertion. */ |
4160 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4161 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4162 | |
4163 | overlay = Qnil; | |
2410d73a | 4164 | tail = NULL; |
9115729e | 4165 | |
27c6b98e SM |
4166 | /* We used to run the functions as soon as we found them and only register |
4167 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4168 | case. But running elisp code as we traverse the list of overlays is | |
4169 | painful because the list can be modified by the elisp code so we had to | |
4170 | copy at several places. We now simply do a read-only traversal that | |
4171 | only collects the functions to run and we run them afterwards. It's | |
4172 | simpler, especially since all the code was already there. -stef */ | |
4173 | ||
a615c6dc | 4174 | if (!after) |
173f2a64 | 4175 | { |
a615c6dc SM |
4176 | /* We are being called before a change. |
4177 | Scan the overlays to find the functions to call. */ | |
4178 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4179 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4180 | { |
a615c6dc SM |
4181 | int startpos, endpos; |
4182 | Lisp_Object ostart, oend; | |
4183 | ||
2410d73a | 4184 | XSETMISC (overlay, tail); |
a615c6dc SM |
4185 | |
4186 | ostart = OVERLAY_START (overlay); | |
4187 | oend = OVERLAY_END (overlay); | |
4188 | endpos = OVERLAY_POSITION (oend); | |
4189 | if (XFASTINT (start) > endpos) | |
4190 | break; | |
4191 | startpos = OVERLAY_POSITION (ostart); | |
4192 | if (insertion && (XFASTINT (start) == startpos | |
4193 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4194 | { |
a615c6dc SM |
4195 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4196 | if (!NILP (prop)) | |
4197 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4198 | } |
a615c6dc SM |
4199 | if (insertion && (XFASTINT (start) == endpos |
4200 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4201 | { |
a615c6dc SM |
4202 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4203 | if (!NILP (prop)) | |
4204 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4205 | } |
a615c6dc SM |
4206 | /* Test for intersecting intervals. This does the right thing |
4207 | for both insertion and deletion. */ | |
4208 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4209 | { |
a615c6dc SM |
4210 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4211 | if (!NILP (prop)) | |
4212 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4213 | } |
173f2a64 | 4214 | } |
60ebfdf3 | 4215 | |
2410d73a | 4216 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4217 | { |
a615c6dc SM |
4218 | int startpos, endpos; |
4219 | Lisp_Object ostart, oend; | |
4220 | ||
2410d73a | 4221 | XSETMISC (overlay, tail); |
a615c6dc SM |
4222 | |
4223 | ostart = OVERLAY_START (overlay); | |
4224 | oend = OVERLAY_END (overlay); | |
4225 | startpos = OVERLAY_POSITION (ostart); | |
4226 | endpos = OVERLAY_POSITION (oend); | |
4227 | if (XFASTINT (end) < startpos) | |
4228 | break; | |
4229 | if (insertion && (XFASTINT (start) == startpos | |
4230 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4231 | { |
a615c6dc SM |
4232 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4233 | if (!NILP (prop)) | |
4234 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4235 | } |
a615c6dc SM |
4236 | if (insertion && (XFASTINT (start) == endpos |
4237 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4238 | { |
a615c6dc SM |
4239 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4240 | if (!NILP (prop)) | |
4241 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4242 | } |
a615c6dc SM |
4243 | /* Test for intersecting intervals. This does the right thing |
4244 | for both insertion and deletion. */ | |
4245 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4246 | { |
a615c6dc SM |
4247 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4248 | if (!NILP (prop)) | |
4249 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4250 | } |
173f2a64 RS |
4251 | } |
4252 | } | |
55b48893 | 4253 | |
a615c6dc SM |
4254 | GCPRO4 (overlay, arg1, arg2, arg3); |
4255 | { | |
4256 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4257 | First copy the vector contents, in case some of these hooks | |
4258 | do subsequent modification of the buffer. */ | |
4259 | int size = last_overlay_modification_hooks_used; | |
4260 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4261 | int i; | |
4262 | ||
4263 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4264 | copy, size * sizeof (Lisp_Object)); | |
4265 | gcpro1.var = copy; | |
4266 | gcpro1.nvars = size; | |
4267 | ||
4268 | for (i = 0; i < size;) | |
4269 | { | |
4270 | Lisp_Object prop, overlay; | |
4271 | prop = copy[i++]; | |
4272 | overlay = copy[i++]; | |
4273 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4274 | } | |
4275 | } | |
55b48893 | 4276 | UNGCPRO; |
173f2a64 RS |
4277 | } |
4278 | ||
4279 | static void | |
930a9140 RS |
4280 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4281 | Lisp_Object list, overlay; | |
4282 | int after; | |
4283 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4284 | { |
930a9140 | 4285 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4286 | |
930a9140 | 4287 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4288 | |
6d70a280 | 4289 | while (CONSP (list)) |
173f2a64 | 4290 | { |
930a9140 | 4291 | if (NILP (arg3)) |
6d70a280 | 4292 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4293 | else |
6d70a280 SM |
4294 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4295 | list = XCDR (list); | |
173f2a64 RS |
4296 | } |
4297 | UNGCPRO; | |
4298 | } | |
9d7608b7 KH |
4299 | |
4300 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4301 | property is set. */ | |
4302 | void | |
4303 | evaporate_overlays (pos) | |
c2d5b10f | 4304 | EMACS_INT pos; |
9d7608b7 | 4305 | { |
2410d73a SM |
4306 | Lisp_Object overlay, hit_list; |
4307 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4308 | |
4309 | hit_list = Qnil; | |
c2d5b10f | 4310 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4311 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4312 | { |
4313 | int endpos; | |
2410d73a | 4314 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4315 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4316 | if (endpos < pos) | |
4317 | break; | |
4318 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4319 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4320 | hit_list = Fcons (overlay, hit_list); |
4321 | } | |
4322 | else | |
2410d73a | 4323 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4324 | { |
4325 | int startpos; | |
2410d73a | 4326 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4327 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4328 | if (startpos > pos) | |
4329 | break; | |
4330 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4331 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4332 | hit_list = Fcons (overlay, hit_list); |
4333 | } | |
7539e11f KR |
4334 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4335 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4336 | } |
173f2a64 | 4337 | \f |
54dfdeb0 | 4338 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4339 | in the slot with offset OFFSET. */ |
4340 | ||
0fa3ba92 | 4341 | void |
54dfdeb0 KH |
4342 | buffer_slot_type_mismatch (offset) |
4343 | int offset; | |
0fa3ba92 | 4344 | { |
54dfdeb0 | 4345 | Lisp_Object sym; |
0fa3ba92 | 4346 | char *type_name; |
177c0ea7 | 4347 | |
7313acd0 | 4348 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4349 | { |
7c02e886 GM |
4350 | case Lisp_Int: |
4351 | type_name = "integers"; | |
4352 | break; | |
177c0ea7 | 4353 | |
7c02e886 GM |
4354 | case Lisp_String: |
4355 | type_name = "strings"; | |
4356 | break; | |
177c0ea7 | 4357 | |
7c02e886 GM |
4358 | case Lisp_Symbol: |
4359 | type_name = "symbols"; | |
4360 | break; | |
177c0ea7 | 4361 | |
0fa3ba92 JB |
4362 | default: |
4363 | abort (); | |
4364 | } | |
4365 | ||
7313acd0 | 4366 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4367 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4368 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4369 | } |
7c02e886 | 4370 | |
0fa3ba92 | 4371 | \f |
b86af064 GM |
4372 | /*********************************************************************** |
4373 | Allocation with mmap | |
4374 | ***********************************************************************/ | |
4375 | ||
4376 | #ifdef USE_MMAP_FOR_BUFFERS | |
4377 | ||
4378 | #include <sys/types.h> | |
4379 | #include <sys/mman.h> | |
4380 | ||
4381 | #ifndef MAP_ANON | |
4382 | #ifdef MAP_ANONYMOUS | |
4383 | #define MAP_ANON MAP_ANONYMOUS | |
4384 | #else | |
4385 | #define MAP_ANON 0 | |
4386 | #endif | |
4387 | #endif | |
4388 | ||
09dfdf85 GM |
4389 | #ifndef MAP_FAILED |
4390 | #define MAP_FAILED ((void *) -1) | |
4391 | #endif | |
4392 | ||
b86af064 GM |
4393 | #include <stdio.h> |
4394 | #include <errno.h> | |
4395 | ||
4396 | #if MAP_ANON == 0 | |
4397 | #include <fcntl.h> | |
4398 | #endif | |
4399 | ||
4400 | #include "coding.h" | |
4401 | ||
4402 | ||
4403 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4404 | The current implementation lets the system select mapped | |
4405 | addresses; we're not using MAP_FIXED in general, except when | |
4406 | trying to enlarge regions. | |
4407 | ||
4408 | Each mapped region starts with a mmap_region structure, the user | |
4409 | area starts after that structure, aligned to MEM_ALIGN. | |
4410 | ||
4411 | +-----------------------+ | |
4412 | | struct mmap_info + | | |
4413 | | padding | | |
4414 | +-----------------------+ | |
4415 | | user data | | |
4416 | | | | |
4417 | | | | |
4418 | +-----------------------+ */ | |
4419 | ||
4420 | struct mmap_region | |
4421 | { | |
4422 | /* User-specified size. */ | |
4423 | size_t nbytes_specified; | |
177c0ea7 | 4424 | |
b86af064 GM |
4425 | /* Number of bytes mapped */ |
4426 | size_t nbytes_mapped; | |
4427 | ||
4428 | /* Pointer to the location holding the address of the memory | |
4429 | allocated with the mmap'd block. The variable actually points | |
4430 | after this structure. */ | |
4431 | POINTER_TYPE **var; | |
4432 | ||
4433 | /* Next and previous in list of all mmap'd regions. */ | |
4434 | struct mmap_region *next, *prev; | |
4435 | }; | |
4436 | ||
4437 | /* Doubly-linked list of mmap'd regions. */ | |
4438 | ||
4439 | static struct mmap_region *mmap_regions; | |
4440 | ||
4441 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4442 | /dev/zero will be opened on it. */ | |
4443 | ||
4444 | static int mmap_fd; | |
4445 | ||
4446 | /* Temporary storage for mmap_set_vars, see there. */ | |
4447 | ||
4448 | static struct mmap_region *mmap_regions_1; | |
4449 | static int mmap_fd_1; | |
4450 | ||
4451 | /* Page size on this system. */ | |
4452 | ||
4453 | static int mmap_page_size; | |
4454 | ||
4455 | /* 1 means mmap has been intialized. */ | |
4456 | ||
4457 | static int mmap_initialized_p; | |
4458 | ||
4459 | /* Value is X rounded up to the next multiple of N. */ | |
4460 | ||
4461 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4462 | ||
4463 | /* Size of mmap_region structure plus padding. */ | |
4464 | ||
4465 | #define MMAP_REGION_STRUCT_SIZE \ | |
4466 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4467 | ||
4468 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4469 | region, return a pointer to the start of the region. */ | |
4470 | ||
4471 | #define MMAP_REGION(P) \ | |
4472 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4473 | ||
4474 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4475 | to the start of the user-visible part of the region. */ | |
4476 | ||
4477 | #define MMAP_USER_AREA(P) \ | |
4478 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4479 | ||
4480 | #define MEM_ALIGN sizeof (double) | |
4481 | ||
7273faa1 DL |
4482 | /* Predicate returning true if part of the address range [START .. END] |
4483 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4484 | memory mapping. |
4485 | ||
4486 | Default is to conservativly assume the address range is occupied by | |
4487 | something else. This can be overridden by system configuration | |
4488 | files if system-specific means to determine this exists. */ | |
4489 | ||
4490 | #ifndef MMAP_ALLOCATED_P | |
4491 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4492 | #endif | |
4493 | ||
b86af064 GM |
4494 | /* Function prototypes. */ |
4495 | ||
4496 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4497 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4498 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4499 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4500 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4501 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4502 | static void mmap_init P_ ((void)); | |
4503 | ||
4504 | ||
4505 | /* Return a region overlapping address range START...END, or null if | |
4506 | none. END is not including, i.e. the last byte in the range | |
4507 | is at END - 1. */ | |
4508 | ||
4509 | static struct mmap_region * | |
4510 | mmap_find (start, end) | |
4511 | POINTER_TYPE *start, *end; | |
4512 | { | |
4513 | struct mmap_region *r; | |
4514 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4515 | |
b86af064 GM |
4516 | for (r = mmap_regions; r; r = r->next) |
4517 | { | |
4518 | char *rstart = (char *) r; | |
4519 | char *rend = rstart + r->nbytes_mapped; | |
4520 | ||
4521 | if (/* First byte of range, i.e. START, in this region? */ | |
4522 | (s >= rstart && s < rend) | |
4523 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4524 | || (e > rstart && e <= rend) | |
4525 | /* First byte of this region in the range? */ | |
4526 | || (rstart >= s && rstart < e) | |
4527 | /* Last byte of this region in the range? */ | |
4528 | || (rend > s && rend <= e)) | |
4529 | break; | |
4530 | } | |
4531 | ||
4532 | return r; | |
4533 | } | |
4534 | ||
4535 | ||
4536 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4537 | the region. Value is non-zero if successful. */ | |
4538 | ||
4539 | static int | |
4540 | mmap_free_1 (r) | |
4541 | struct mmap_region *r; | |
4542 | { | |
4543 | if (r->next) | |
4544 | r->next->prev = r->prev; | |
4545 | if (r->prev) | |
4546 | r->prev->next = r->next; | |
4547 | else | |
4548 | mmap_regions = r->next; | |
177c0ea7 | 4549 | |
1a15cca0 | 4550 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4551 | { |
4552 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4553 | return 0; | |
4554 | } | |
4555 | ||
4556 | return 1; | |
4557 | } | |
4558 | ||
4559 | ||
4560 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4561 | Value is non-zero if successful. */ | |
4562 | ||
4563 | static int | |
4564 | mmap_enlarge (r, npages) | |
4565 | struct mmap_region *r; | |
4566 | int npages; | |
4567 | { | |
4568 | char *region_end = (char *) r + r->nbytes_mapped; | |
4569 | size_t nbytes; | |
4570 | int success = 0; | |
4571 | ||
4572 | if (npages < 0) | |
4573 | { | |
4574 | /* Unmap pages at the end of the region. */ | |
4575 | nbytes = - npages * mmap_page_size; | |
4576 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4577 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4578 | else | |
4579 | { | |
4580 | r->nbytes_mapped -= nbytes; | |
4581 | success = 1; | |
4582 | } | |
4583 | } | |
4584 | else if (npages > 0) | |
4585 | { | |
b86af064 | 4586 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4587 | |
b86af064 GM |
4588 | /* Try to map additional pages at the end of the region. We |
4589 | cannot do this if the address range is already occupied by | |
4590 | something else because mmap deletes any previous mapping. | |
4591 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4592 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4593 | { |
4594 | POINTER_TYPE *p; | |
177c0ea7 | 4595 | |
b86af064 GM |
4596 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4597 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4598 | if (p == MAP_FAILED) | |
edaa9aed | 4599 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4600 | else if (p != (POINTER_TYPE *) region_end) |
4601 | { | |
4602 | /* Kernels are free to choose a different address. In | |
4603 | that case, unmap what we've mapped above; we have | |
4604 | no use for it. */ | |
4605 | if (munmap (p, nbytes) == -1) | |
4606 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4607 | } | |
4608 | else | |
4609 | { | |
4610 | r->nbytes_mapped += nbytes; | |
4611 | success = 1; | |
4612 | } | |
4613 | } | |
4614 | } | |
4615 | ||
4616 | return success; | |
4617 | } | |
4618 | ||
4619 | ||
4620 | /* Set or reset variables holding references to mapped regions. If | |
4621 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4622 | non-zero, set all variables to the start of the user-areas | |
4623 | of mapped regions. | |
4624 | ||
4625 | This function is called from Fdump_emacs to ensure that the dumped | |
4626 | Emacs doesn't contain references to memory that won't be mapped | |
4627 | when Emacs starts. */ | |
4628 | ||
4629 | void | |
4630 | mmap_set_vars (restore_p) | |
4631 | int restore_p; | |
4632 | { | |
4633 | struct mmap_region *r; | |
4634 | ||
4635 | if (restore_p) | |
4636 | { | |
4637 | mmap_regions = mmap_regions_1; | |
4638 | mmap_fd = mmap_fd_1; | |
4639 | for (r = mmap_regions; r; r = r->next) | |
4640 | *r->var = MMAP_USER_AREA (r); | |
4641 | } | |
4642 | else | |
4643 | { | |
4644 | for (r = mmap_regions; r; r = r->next) | |
4645 | *r->var = NULL; | |
4646 | mmap_regions_1 = mmap_regions; | |
4647 | mmap_regions = NULL; | |
4648 | mmap_fd_1 = mmap_fd; | |
4649 | mmap_fd = -1; | |
4650 | } | |
4651 | } | |
4652 | ||
4653 | ||
4654 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4655 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4656 | address of some variable which will use the data area. | |
4657 | ||
4658 | The allocation of 0 bytes is valid. | |
4659 | ||
4660 | If we can't allocate the necessary memory, set *VAR to null, and | |
4661 | return null. */ | |
4662 | ||
4663 | static POINTER_TYPE * | |
4664 | mmap_alloc (var, nbytes) | |
4665 | POINTER_TYPE **var; | |
4666 | size_t nbytes; | |
4667 | { | |
4668 | void *p; | |
4669 | size_t map; | |
4670 | ||
4671 | mmap_init (); | |
4672 | ||
4673 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4674 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4675 | mmap_fd, 0); | |
177c0ea7 | 4676 | |
b86af064 GM |
4677 | if (p == MAP_FAILED) |
4678 | { | |
4679 | if (errno != ENOMEM) | |
4680 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4681 | p = NULL; | |
4682 | } | |
4683 | else | |
4684 | { | |
4685 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4686 | |
b86af064 GM |
4687 | r->nbytes_specified = nbytes; |
4688 | r->nbytes_mapped = map; | |
4689 | r->var = var; | |
4690 | r->prev = NULL; | |
4691 | r->next = mmap_regions; | |
4692 | if (r->next) | |
4693 | r->next->prev = r; | |
4694 | mmap_regions = r; | |
177c0ea7 | 4695 | |
b86af064 GM |
4696 | p = MMAP_USER_AREA (p); |
4697 | } | |
177c0ea7 | 4698 | |
b86af064 GM |
4699 | return *var = p; |
4700 | } | |
4701 | ||
4702 | ||
4703 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4704 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4705 | and return this value. If more memory cannot be allocated, then | |
4706 | leave *VAR unchanged, and return null. */ | |
4707 | ||
4708 | static POINTER_TYPE * | |
4709 | mmap_realloc (var, nbytes) | |
4710 | POINTER_TYPE **var; | |
4711 | size_t nbytes; | |
4712 | { | |
4713 | POINTER_TYPE *result; | |
177c0ea7 | 4714 | |
b86af064 GM |
4715 | mmap_init (); |
4716 | ||
4717 | if (*var == NULL) | |
4718 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4719 | else if (nbytes == 0) |
b86af064 GM |
4720 | { |
4721 | mmap_free (var); | |
4722 | result = mmap_alloc (var, nbytes); | |
4723 | } | |
4724 | else | |
4725 | { | |
4726 | struct mmap_region *r = MMAP_REGION (*var); | |
4727 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4728 | |
b86af064 GM |
4729 | if (room < nbytes) |
4730 | { | |
4731 | /* Must enlarge. */ | |
4732 | POINTER_TYPE *old_ptr = *var; | |
4733 | ||
4734 | /* Try to map additional pages at the end of the region. | |
4735 | If that fails, allocate a new region, copy data | |
4736 | from the old region, then free it. */ | |
4737 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4738 | / mmap_page_size))) | |
4739 | { | |
4740 | r->nbytes_specified = nbytes; | |
4741 | *var = result = old_ptr; | |
4742 | } | |
4743 | else if (mmap_alloc (var, nbytes)) | |
4744 | { | |
4745 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4746 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4747 | result = *var; | |
4748 | r = MMAP_REGION (result); | |
4749 | r->nbytes_specified = nbytes; | |
4750 | } | |
4751 | else | |
4752 | { | |
4753 | *var = old_ptr; | |
4754 | result = NULL; | |
4755 | } | |
4756 | } | |
4757 | else if (room - nbytes >= mmap_page_size) | |
4758 | { | |
4759 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4760 | memory back to the system. |
4761 | ||
4762 | The extra parens are to make the division happens first, | |
4763 | on positive values, so we know it will round towards | |
4764 | zero. */ | |
bb63c5c9 | 4765 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4766 | result = *var; |
4767 | r->nbytes_specified = nbytes; | |
4768 | } | |
4769 | else | |
4770 | { | |
4771 | /* Leave it alone. */ | |
4772 | result = *var; | |
4773 | r->nbytes_specified = nbytes; | |
4774 | } | |
4775 | } | |
4776 | ||
4777 | return result; | |
4778 | } | |
4779 | ||
4780 | ||
4781 | /* Free a block of relocatable storage whose data is pointed to by | |
4782 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4783 | ||
4784 | static void | |
4785 | mmap_free (var) | |
4786 | POINTER_TYPE **var; | |
4787 | { | |
4788 | mmap_init (); | |
177c0ea7 | 4789 | |
b86af064 GM |
4790 | if (*var) |
4791 | { | |
4792 | mmap_free_1 (MMAP_REGION (*var)); | |
4793 | *var = NULL; | |
4794 | } | |
4795 | } | |
4796 | ||
4797 | ||
4798 | /* Perform necessary intializations for the use of mmap. */ | |
4799 | ||
4800 | static void | |
4801 | mmap_init () | |
4802 | { | |
4803 | #if MAP_ANON == 0 | |
4804 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4805 | in a dumped Emacs. */ | |
4806 | if (mmap_fd <= 0) | |
4807 | { | |
4808 | /* No anonymous mmap -- we need the file descriptor. */ | |
4809 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4810 | if (mmap_fd == -1) | |
4811 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4812 | } | |
4813 | #endif /* MAP_ANON == 0 */ | |
4814 | ||
4815 | if (mmap_initialized_p) | |
4816 | return; | |
4817 | mmap_initialized_p = 1; | |
177c0ea7 | 4818 | |
b86af064 GM |
4819 | #if MAP_ANON != 0 |
4820 | mmap_fd = -1; | |
4821 | #endif | |
177c0ea7 | 4822 | |
b86af064 GM |
4823 | mmap_page_size = getpagesize (); |
4824 | } | |
4825 | ||
4826 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4827 | ||
4828 | ||
4829 | \f | |
4830 | /*********************************************************************** | |
4831 | Buffer-text Allocation | |
4832 | ***********************************************************************/ | |
4833 | ||
4834 | #ifdef REL_ALLOC | |
4835 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4836 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4837 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4838 | #endif /* REL_ALLOC */ | |
4839 | ||
4840 | ||
4841 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4842 | ||
4843 | static void | |
4844 | alloc_buffer_text (b, nbytes) | |
4845 | struct buffer *b; | |
4846 | size_t nbytes; | |
4847 | { | |
4848 | POINTER_TYPE *p; | |
177c0ea7 | 4849 | |
b86af064 GM |
4850 | BLOCK_INPUT; |
4851 | #if defined USE_MMAP_FOR_BUFFERS | |
4852 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4853 | #elif defined REL_ALLOC | |
4854 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4855 | #else | |
815add84 | 4856 | p = xmalloc (nbytes); |
b86af064 | 4857 | #endif |
177c0ea7 | 4858 | |
b86af064 GM |
4859 | if (p == NULL) |
4860 | { | |
4861 | UNBLOCK_INPUT; | |
4862 | memory_full (); | |
4863 | } | |
4864 | ||
4865 | b->text->beg = (unsigned char *) p; | |
4866 | UNBLOCK_INPUT; | |
4867 | } | |
4868 | ||
4869 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4870 | shrink it. */ | |
4871 | ||
4872 | void | |
4873 | enlarge_buffer_text (b, delta) | |
4874 | struct buffer *b; | |
4875 | int delta; | |
4876 | { | |
4877 | POINTER_TYPE *p; | |
4878 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4879 | + delta); | |
4880 | BLOCK_INPUT; | |
4881 | #if defined USE_MMAP_FOR_BUFFERS | |
4882 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4883 | #elif defined REL_ALLOC | |
4884 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4885 | #else | |
4886 | p = xrealloc (b->text->beg, nbytes); | |
4887 | #endif | |
177c0ea7 | 4888 | |
b86af064 GM |
4889 | if (p == NULL) |
4890 | { | |
4891 | UNBLOCK_INPUT; | |
4892 | memory_full (); | |
4893 | } | |
4894 | ||
4895 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4896 | UNBLOCK_INPUT; | |
4897 | } | |
4898 | ||
4899 | ||
4900 | /* Free buffer B's text buffer. */ | |
4901 | ||
4902 | static void | |
4903 | free_buffer_text (b) | |
4904 | struct buffer *b; | |
4905 | { | |
4906 | BLOCK_INPUT; | |
4907 | ||
4908 | #if defined USE_MMAP_FOR_BUFFERS | |
4909 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4910 | #elif defined REL_ALLOC | |
4911 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4912 | #else | |
4913 | xfree (b->text->beg); | |
4914 | #endif | |
177c0ea7 | 4915 | |
b86af064 GM |
4916 | BUF_BEG_ADDR (b) = NULL; |
4917 | UNBLOCK_INPUT; | |
4918 | } | |
4919 | ||
4920 | ||
4921 | \f | |
4922 | /*********************************************************************** | |
4923 | Initialization | |
4924 | ***********************************************************************/ | |
4925 | ||
dfcf069d | 4926 | void |
1ab256cb RM |
4927 | init_buffer_once () |
4928 | { | |
7c02e886 GM |
4929 | int idx; |
4930 | ||
4931 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4932 | |
1ab256cb RM |
4933 | /* Make sure all markable slots in buffer_defaults |
4934 | are initialized reasonably, so mark_buffer won't choke. */ | |
4935 | reset_buffer (&buffer_defaults); | |
13de9290 | 4936 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4937 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4938 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4939 | /* Prevent GC from getting confused. */ |
4940 | buffer_defaults.text = &buffer_defaults.own_text; | |
4941 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4942 | BUF_INTERVALS (&buffer_defaults) = 0; |
4943 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4944 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4945 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4946 | |
4947 | /* Set up the default values of various buffer slots. */ | |
4948 | /* Must do these before making the first buffer! */ | |
4949 | ||
f532dca0 | 4950 | /* real setup is done in bindings.el */ |
1ab256cb | 4951 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4952 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4953 | buffer_defaults.abbrev_mode = Qnil; |
4954 | buffer_defaults.overwrite_mode = Qnil; | |
4955 | buffer_defaults.case_fold_search = Qt; | |
4956 | buffer_defaults.auto_fill_function = Qnil; | |
4957 | buffer_defaults.selective_display = Qnil; | |
4958 | #ifndef old | |
4959 | buffer_defaults.selective_display_ellipses = Qt; | |
4960 | #endif | |
4961 | buffer_defaults.abbrev_table = Qnil; | |
4962 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4963 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4964 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4965 | buffer_defaults.file_format = Qnil; |
71ed49fa | 4966 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
4967 | buffer_defaults.overlays_before = NULL; |
4968 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4969 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4970 | |
8d7a4592 | 4971 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4972 | buffer_defaults.truncate_lines = Qnil; |
4973 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4974 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4975 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 4976 | buffer_defaults.extra_line_spacing = Qnil; |
1ab256cb | 4977 | |
f7975d07 | 4978 | #ifdef DOS_NT |
0776cb1b | 4979 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 4980 | #endif |
a1a17b61 | 4981 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 4982 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
4983 | XSETFASTINT (buffer_defaults.fill_column, 70); |
4984 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 4985 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 4986 | buffer_defaults.file_truename = Qnil; |
7962a441 | 4987 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
4988 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
4989 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
4990 | buffer_defaults.left_fringe_width = Qnil; | |
4991 | buffer_defaults.right_fringe_width = Qnil; | |
4992 | buffer_defaults.fringes_outside_margins = Qnil; | |
4993 | buffer_defaults.scroll_bar_width = Qnil; | |
4994 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 4995 | buffer_defaults.indicate_empty_lines = Qnil; |
8e8767f8 | 4996 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
0552666b GM |
4997 | buffer_defaults.scroll_up_aggressively = Qnil; |
4998 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 4999 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5000 | |
5001 | /* Assign the local-flags to the slots that have default values. | |
5002 | The local flag is a bit that is used in the buffer | |
5003 | to say that it has its own local value for the slot. | |
5004 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5005 | ||
5006 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5007 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5008 | |
5009 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5010 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5011 | XSETINT (buffer_local_flags.filename, -1); |
5012 | XSETINT (buffer_local_flags.directory, -1); | |
5013 | XSETINT (buffer_local_flags.backed_up, -1); | |
5014 | XSETINT (buffer_local_flags.save_length, -1); | |
5015 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5016 | XSETINT (buffer_local_flags.read_only, -1); | |
5017 | XSETINT (buffer_local_flags.major_mode, -1); | |
5018 | XSETINT (buffer_local_flags.mode_name, -1); | |
5019 | XSETINT (buffer_local_flags.undo_list, -1); | |
5020 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5021 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5022 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5023 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5024 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5025 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5026 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5027 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5028 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5029 | |
7c02e886 GM |
5030 | idx = 1; |
5031 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5032 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5033 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5034 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5035 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5036 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5037 | #ifndef old |
7c02e886 | 5038 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5039 | #endif |
7c02e886 GM |
5040 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5041 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5042 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5043 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5044 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5045 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5046 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5047 | #ifdef DOS_NT |
7c02e886 | 5048 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5049 | /* Make this one a permanent local. */ |
7c02e886 | 5050 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5051 | #endif |
7c02e886 GM |
5052 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5053 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5054 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5055 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5056 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5057 | /* Make this one a permanent local. */ |
7c02e886 | 5058 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5059 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5060 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5061 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5062 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5063 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5064 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5065 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5066 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
8e8767f8 | 5067 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
7c02e886 GM |
5068 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5069 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5070 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5071 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5072 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
7c02e886 GM |
5073 | |
5074 | /* Need more room? */ | |
7313acd0 | 5075 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5076 | abort (); |
7313acd0 | 5077 | last_per_buffer_idx = idx; |
177c0ea7 | 5078 | |
1ab256cb RM |
5079 | Vbuffer_alist = Qnil; |
5080 | current_buffer = 0; | |
5081 | all_buffers = 0; | |
5082 | ||
5083 | QSFundamental = build_string ("Fundamental"); | |
5084 | ||
5085 | Qfundamental_mode = intern ("fundamental-mode"); | |
5086 | buffer_defaults.major_mode = Qfundamental_mode; | |
5087 | ||
5088 | Qmode_class = intern ("mode-class"); | |
5089 | ||
5090 | Qprotected_field = intern ("protected-field"); | |
5091 | ||
5092 | Qpermanent_local = intern ("permanent-local"); | |
5093 | ||
5094 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5095 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5096 | |
48265e61 DL |
5097 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5098 | ||
1ab256cb | 5099 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5100 | |
1ab256cb RM |
5101 | /* super-magic invisible buffer */ |
5102 | Vbuffer_alist = Qnil; | |
5103 | ||
ffd56f97 | 5104 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5105 | |
5106 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5107 | } |
5108 | ||
dfcf069d | 5109 | void |
1ab256cb RM |
5110 | init_buffer () |
5111 | { | |
93c27ef1 | 5112 | char buf[MAXPATHLEN + 1]; |
2381d133 JB |
5113 | char *pwd; |
5114 | struct stat dotstat, pwdstat; | |
136351b7 | 5115 | Lisp_Object temp; |
f7975d07 | 5116 | int rc; |
1ab256cb | 5117 | |
b86af064 | 5118 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5119 | { |
5120 | /* When using the ralloc implementation based on mmap(2), buffer | |
5121 | text pointers will have been set to null in the dumped Emacs. | |
5122 | Map new memory. */ | |
5123 | struct buffer *b; | |
177c0ea7 | 5124 | |
93c27ef1 GM |
5125 | for (b = all_buffers; b; b = b->next) |
5126 | if (b->text->beg == NULL) | |
b86af064 | 5127 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5128 | } |
b86af064 | 5129 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5130 | |
1ab256cb | 5131 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5132 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5133 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5134 | |
314dbe9a PE |
5135 | /* If PWD is accurate, use it instead of calling getwd. PWD is |
5136 | sometimes a nicer name, and using it may avoid a fatal error if a | |
5137 | parent directory is searchable but not readable. */ | |
309f2a6e RS |
5138 | if ((pwd = getenv ("PWD")) != 0 |
5139 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
5140 | && stat (pwd, &pwdstat) == 0 |
5141 | && stat (".", &dotstat) == 0 | |
5142 | && dotstat.st_ino == pwdstat.st_ino | |
5143 | && dotstat.st_dev == pwdstat.st_dev | |
5144 | && strlen (pwd) < MAXPATHLEN) | |
5145 | strcpy (buf, pwd); | |
6335beb0 RS |
5146 | #ifdef HAVE_GETCWD |
5147 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 5148 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 5149 | #else |
2381d133 | 5150 | else if (getwd (buf) == 0) |
cf1e6391 | 5151 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 5152 | #endif |
1ab256cb RM |
5153 | |
5154 | #ifndef VMS | |
5155 | /* Maybe this should really use some standard subroutine | |
5156 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
5157 | rc = strlen (buf); |
5158 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
5159 | { | |
5160 | buf[rc] = DIRECTORY_SEP; | |
5161 | buf[rc + 1] = '\0'; | |
5162 | } | |
1ab256cb | 5163 | #endif /* not VMS */ |
0995fa35 | 5164 | |
1ab256cb | 5165 | current_buffer->directory = build_string (buf); |
136351b7 | 5166 | |
0995fa35 RS |
5167 | /* Add /: to the front of the name |
5168 | if it would otherwise be treated as magic. */ | |
5169 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5170 | if (! NILP (temp) |
5171 | /* If the default dir is just /, TEMP is non-nil | |
5172 | because of the ange-ftp completion handler. | |
5173 | However, it is not necessary to turn / into /:/. | |
5174 | So avoid doing that. */ | |
d5db4077 | 5175 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5176 | current_buffer->directory |
5177 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5178 | ||
136351b7 RS |
5179 | temp = get_minibuffer (0); |
5180 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
5181 | } |
5182 | ||
5183 | /* initialize the buffer routines */ | |
dfcf069d | 5184 | void |
1ab256cb RM |
5185 | syms_of_buffer () |
5186 | { | |
9115729e KH |
5187 | staticpro (&last_overlay_modification_hooks); |
5188 | last_overlay_modification_hooks | |
5189 | = Fmake_vector (make_number (10), Qnil); | |
5190 | ||
1ab256cb RM |
5191 | staticpro (&Vbuffer_defaults); |
5192 | staticpro (&Vbuffer_local_symbols); | |
5193 | staticpro (&Qfundamental_mode); | |
5194 | staticpro (&Qmode_class); | |
5195 | staticpro (&QSFundamental); | |
5196 | staticpro (&Vbuffer_alist); | |
5197 | staticpro (&Qprotected_field); | |
5198 | staticpro (&Qpermanent_local); | |
5199 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5200 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5201 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5202 | Qevaporate = intern ("evaporate"); |
5203 | staticpro (&Qevaporate); | |
294d215f | 5204 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5205 | staticpro (&Qmodification_hooks); |
294d215f | 5206 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5207 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5208 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5209 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5210 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5211 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5212 | Qpriority = intern ("priority"); |
5213 | staticpro (&Qpriority); | |
5214 | Qwindow = intern ("window"); | |
5215 | staticpro (&Qwindow); | |
bbbe9545 KH |
5216 | Qbefore_string = intern ("before-string"); |
5217 | staticpro (&Qbefore_string); | |
5218 | Qafter_string = intern ("after-string"); | |
5219 | staticpro (&Qafter_string); | |
22378665 RS |
5220 | Qfirst_change_hook = intern ("first-change-hook"); |
5221 | staticpro (&Qfirst_change_hook); | |
5222 | Qbefore_change_functions = intern ("before-change-functions"); | |
5223 | staticpro (&Qbefore_change_functions); | |
5224 | Qafter_change_functions = intern ("after-change-functions"); | |
5225 | staticpro (&Qafter_change_functions); | |
48265e61 | 5226 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5227 | |
5b20caf0 RS |
5228 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5229 | staticpro (&Qkill_buffer_query_functions); | |
5230 | ||
1ab256cb RM |
5231 | Fput (Qprotected_field, Qerror_conditions, |
5232 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5233 | Fput (Qprotected_field, Qerror_message, | |
5234 | build_string ("Attempt to modify a protected field")); | |
5235 | ||
5236 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5237 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5238 | ||
5239 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5240 | &buffer_defaults.mode_line_format, |
5241 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5242 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5243 | |
045dee35 | 5244 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5245 | &buffer_defaults.header_line_format, |
5246 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5247 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5248 | |
7ee72033 MB |
5249 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5250 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5251 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5252 | |
a3bbced0 | 5253 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5254 | &buffer_defaults.extra_line_spacing, |
5255 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5256 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5257 | |
1ab256cb | 5258 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5259 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5260 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5261 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5262 | |
5263 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5264 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5265 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5266 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5267 | |
3b06f880 | 5268 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
efc7e75f | 5269 | &buffer_defaults.direction_reversed, |
20464fdf | 5270 | doc: /* Default value of `direction-reversed' for buffers that do not override it. |
018ba359 | 5271 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5272 | |
a1a17b61 | 5273 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
efc7e75f | 5274 | &buffer_defaults.enable_multibyte_characters, |
7ee72033 | 5275 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5276 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5277 | |
c71b5d9b | 5278 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
efc7e75f | 5279 | &buffer_defaults.buffer_file_coding_system, |
7ee72033 | 5280 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. |
018ba359 | 5281 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5282 | |
1ab256cb | 5283 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5284 | &buffer_defaults.truncate_lines, |
5285 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5286 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5287 | |
5288 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5289 | &buffer_defaults.fill_column, |
5290 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5291 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5292 | |
5293 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5294 | &buffer_defaults.left_margin, |
5295 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5296 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5297 | |
5298 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
7ee72033 MB |
5299 | &buffer_defaults.tab_width, |
5300 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5301 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5302 | |
5303 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5304 | &buffer_defaults.case_fold_search, |
5305 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5306 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5307 | |
f7975d07 | 5308 | #ifdef DOS_NT |
177c0ea7 | 5309 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5310 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5311 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5312 | This is the same as (default-value 'buffer-file-type). |
5313 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5314 | #endif |
5315 | ||
0552666b | 5316 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5317 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5318 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5319 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5320 | |
5321 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5322 | &buffer_defaults.right_margin_cols, |
5323 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5324 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5325 | |
2ad8731a KS |
5326 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5327 | &buffer_defaults.left_fringe_width, | |
5328 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5329 | This is the same as (default-value 'left-fringe-width). */); | |
5330 | ||
5331 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5332 | &buffer_defaults.right_fringe_width, | |
5333 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5334 | This is the same as (default-value 'right-fringe-width). */); | |
5335 | ||
5336 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5337 | &buffer_defaults.fringes_outside_margins, | |
5338 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5339 | This is the same as (default-value 'fringes-outside-margins). */); | |
5340 | ||
5341 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5342 | &buffer_defaults.scroll_bar_width, | |
5343 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5344 | This is the same as (default-value 'scroll-bar-width). */); | |
5345 | ||
5346 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5347 | &buffer_defaults.vertical_scroll_bar_type, | |
5348 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5349 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5350 | ||
0552666b | 5351 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5352 | &buffer_defaults.indicate_empty_lines, |
5353 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5354 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5355 | |
8e8767f8 KS |
5356 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5357 | &buffer_defaults.indicate_buffer_boundaries, | |
5358 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5359 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5360 | ||
0552666b | 5361 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5362 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5363 | doc: /* Default value of `scroll-up-aggressively'. |
5364 | This value applies in buffers that don't have their own local values. | |
5365 | This variable is an alias for (default-value 'scroll-up-aggressively). */); | |
177c0ea7 | 5366 | |
0552666b | 5367 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5368 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5369 | doc: /* Default value of `scroll-down-aggressively'. |
5370 | This value applies in buffers that don't have their own local values. | |
5371 | This variable is an alias for (default-value 'scroll-down-aggressively). */); | |
177c0ea7 | 5372 | |
045dee35 | 5373 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5374 | ¤t_buffer->header_line_format, |
7ee72033 | 5375 | Qnil, |
7614d762 RS |
5376 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5377 | The header line appears, optionally, at the top of a window; | |
5378 | the mode line appears at the bottom. */); | |
177c0ea7 | 5379 | |
1ab256cb | 5380 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5381 | Qnil, |
5382 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5383 | Each buffer has its own value of this variable. |
5384 | Value may be nil, a string, a symbol or a list or cons cell. | |
5385 | A value of nil means don't display a mode line. | |
5386 | For a symbol, its value is used (but it is ignored if t or nil). | |
5387 | A string appearing directly as the value of a symbol is processed verbatim | |
5388 | in that the %-constructs below are not recognized. | |
ed463255 | 5389 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5390 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5391 | in the value of that symbol will be ignored. |
018ba359 | 5392 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5393 | is used as a mode line element. Be careful--FORM should not load any files, |
5394 | because that can cause an infinite recursion. | |
ed463255 KS |
5395 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5396 | with the specified properties PROPS applied. | |
018ba359 PJ |
5397 | For a list whose car is a symbol, the symbol's value is taken, |
5398 | and if that is non-nil, the cadr of the list is processed recursively. | |
5399 | Otherwise, the caddr of the list (if there is one) is processed. | |
5400 | For a list whose car is a string or list, each element is processed | |
5401 | recursively and the results are effectively concatenated. | |
5402 | For a list whose car is an integer, the cdr of the list is processed | |
5403 | and padded (if the number is positive) or truncated (if negative) | |
5404 | to the width specified by that number. | |
5405 | A string is printed verbatim in the mode line except for %-constructs: | |
5406 | (%-constructs are allowed when the string is the entire mode-line-format | |
5407 | or when it is found in a cons-cell or a list) | |
5408 | %b -- print buffer name. %f -- print visited file name. | |
5409 | %F -- print frame name. | |
5410 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5411 | %& is like %*, but ignore read-only-ness. | |
5412 | % means buffer is read-only and * means it is modified. | |
5413 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5414 | %s -- print process status. %l -- print the current line number. | |
5415 | %c -- print the current column number (this makes editing slower). | |
5416 | To make the column number update correctly in all cases, | |
5417 | `column-number-mode' must be non-nil. | |
77d31fb4 LK |
5418 | %i -- print the size of the buffer. |
5419 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5420 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5421 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5422 | or print Bottom or All. | |
5423 | %m -- print the mode name. | |
5424 | %n -- print Narrow if appropriate. | |
5425 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems. | |
5426 | %Z -- like %z, but including the end-of-line format. | |
5427 | %[ -- print one [ for each recursive editing level. %] similar. | |
5428 | %% -- print %. %- -- print infinitely many dashes. | |
5429 | Decimal digits after the % specify field width to which to pad. */); | |
5430 | ||
7ee72033 | 5431 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5432 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
557ca2c1 RS |
5433 | nil here means use current buffer's major mode, provided it is not |
5434 | marked as "special". | |
5435 | ||
5436 | When a mode is used by default, `find-file' switches to it | |
5437 | before it reads the contents into the buffer and before | |
5438 | it finishes setting up the buffer. Thus, the mode and | |
5439 | its hooks should not expect certain variables such as | |
5440 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5441 | |
5442 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5443 | make_number (Lisp_Symbol), |
efc7e75f | 5444 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5445 | |
5446 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5447 | Qnil, |
efc7e75f | 5448 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5449 | |
7ee72033 | 5450 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5451 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5452 | |
5453 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5454 | Qnil, |
efc7e75f | 5455 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5456 | |
5457 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5458 | make_number (Lisp_Int), |
1ac5826d | 5459 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5460 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5461 | |
5462 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5463 | make_number (Lisp_Int), |
efc7e75f | 5464 | doc: /* *Column for the default indent-line-function to indent to. |
018ba359 | 5465 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5466 | |
5467 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5468 | make_number (Lisp_Int), |
efc7e75f | 5469 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5470 | |
7ee72033 | 5471 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5472 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5473 | A value of nil means use backslash and octal digits. |
5474 | This variable does not apply to characters whose display is specified | |
5475 | in the current display table (if there is one). */); | |
1ab256cb | 5476 | |
3b06f880 | 5477 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5478 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5479 | Qnil, |
efc7e75f | 5480 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5481 | Otherwise they are regarded as unibyte. This affects the display, |
5482 | file I/O and the behavior of various editing commands. | |
5483 | ||
5484 | This variable is buffer-local but you cannot set it directly; | |
5485 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5486 | Changing its default value with `setq-default' is supported. | |
5487 | See also variable `default-enable-multibyte-characters' and Info node | |
5488 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5489 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5490 | |
c71b5d9b | 5491 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5492 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5493 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5494 | This variable applies to saving the buffer, and also to `write-region' |
5495 | and other functions that use `write-region'. | |
5496 | It does not apply to sending output to subprocesses, however. | |
5497 | ||
5498 | If this is nil, the buffer is saved without any code conversion | |
5499 | unless some coding system is specified in `file-coding-system-alist' | |
5500 | for the buffer file. | |
5501 | ||
31a6cb06 EZ |
5502 | If the text to be saved cannot be encoded as specified by this variable, |
5503 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5504 | ||
018ba359 PJ |
5505 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5506 | ||
5507 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5508 | |
3b06f880 | 5509 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5510 | Qnil, |
efc7e75f | 5511 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5512 | |
7ee72033 | 5513 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5514 | doc: /* *Non-nil means do not display continuation lines. |
5515 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5516 | |
5517 | Note that this is overridden by the variable | |
5518 | `truncate-partial-width-windows' if that variable is non-nil | |
5519 | and this buffer is not full-frame width. */); | |
1ab256cb | 5520 | |
f7975d07 | 5521 | #ifdef DOS_NT |
54ad07d3 | 5522 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5523 | Qnil, |
efc7e75f | 5524 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5525 | This variable is meaningful on MS-DOG and Windows NT. |
5526 | On those systems, it is automatically local in every buffer. | |
5527 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5528 | #endif |
5529 | ||
1ab256cb | 5530 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5531 | make_number (Lisp_String), |
efc7e75f | 5532 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5533 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5534 | |
5535 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5536 | Qnil, |
efc7e75f | 5537 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5538 | It is called after self-inserting any character specified in |
5539 | the `auto-fill-chars' table. | |
5540 | NOTE: This variable is not a hook; | |
5541 | its value may not be a list of functions. */); | |
1ab256cb RM |
5542 | |
5543 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5544 | make_number (Lisp_String), |
efc7e75f | 5545 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5546 | |
f6ed2e84 | 5547 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5548 | make_number (Lisp_String), |
efc7e75f | 5549 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5550 | The truename of a file is calculated by `file-truename' |
5551 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5552 | |
1ab256cb | 5553 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5554 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5555 | make_number (Lisp_String), |
7614d762 RS |
5556 | doc: /* Name of file for auto-saving current buffer. |
5557 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5558 | |
7ee72033 | 5559 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5560 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5561 | |
7ee72033 | 5562 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5563 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5564 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5565 | |
5566 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5567 | make_number (Lisp_Int), |
efc7e75f | 5568 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5569 | 0 initially. */); |
1ab256cb RM |
5570 | |
5571 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5572 | Qnil, |
7614d762 RS |
5573 | doc: /* Non-nil enables selective display. |
5574 | An Integer N as value means display only lines | |
5575 | that start with less than n columns of space. | |
5576 | A value of t means that the character ^M makes itself and | |
5577 | all the rest of the line invisible; also, when saving the buffer | |
5578 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5579 | |
5580 | #ifndef old | |
5581 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5582 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5583 | Qnil, |
3f676284 | 5584 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5585 | #endif |
5586 | ||
7ee72033 | 5587 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5588 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5589 | The value should be one of `overwrite-mode-textual', |
5590 | `overwrite-mode-binary', or nil. | |
5591 | If it is `overwrite-mode-textual', self-insertion still | |
5592 | inserts at the end of a line, and inserts when point is before a tab, | |
5593 | until the tab is filled in. | |
5594 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5595 | ||
54939090 | 5596 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5597 | Qnil, |
efc7e75f | 5598 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5599 | |
5600 | If this variable is nil, the value of `standard-display-table' is used. | |
5601 | Each window can have its own, overriding display table, see | |
5602 | `set-window-display-table' and `window-display-table'. | |
5603 | ||
5604 | The display table is a char-table created with `make-display-table'. | |
5605 | A char-table is an array indexed by character codes. Normal array | |
5606 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5607 | ||
5608 | Each of the char-table elements control how to display the corresponding | |
5609 | text character: the element at index C in the table says how to display | |
5610 | the character whose code is C. Each element should be a vector of | |
5611 | characters or nil. nil means display the character in the default fashion; | |
5612 | otherwise, the characters from the vector are delivered to the screen | |
5613 | instead of the original character. | |
5614 | ||
5615 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display | |
5616 | a capital Y instead of each X character. | |
5617 | ||
5618 | In addition, a char-table has six extra slots to control the display of: | |
5619 | ||
5620 | the end of a truncated screen line (extra-slot 0, a single character); | |
5621 | the end of a continued line (extra-slot 1, a single character); | |
5622 | the escape character used to display character codes in octal | |
5623 | (extra-slot 2, a single character); | |
5624 | the character used as an arrow for control characters (extra-slot 3, | |
5625 | a single character); | |
5626 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5627 | a vector of characters); | |
5628 | the character used to draw the border between side-by-side windows | |
5629 | (extra-slot 5, a single character). | |
5630 | ||
5631 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5632 | |
2ad8731a | 5633 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5634 | Qnil, |
efc7e75f | 5635 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5636 | A value of nil means no marginal area. */); |
177c0ea7 | 5637 | |
2ad8731a | 5638 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5639 | Qnil, |
efc7e75f | 5640 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5641 | A value of nil means no marginal area. */); |
177c0ea7 | 5642 | |
2ad8731a KS |
5643 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5644 | Qnil, | |
5645 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5646 | A value of 0 means no left fringe is shown in this buffer's window. | |
5647 | A value of nil means to use the left fringe width from the window's frame. */); | |
5648 | ||
5649 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5650 | Qnil, | |
5651 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5652 | A value of 0 means no right fringe is shown in this buffer's window. | |
5653 | A value of nil means to use the right fringe width from the window's frame. */); | |
5654 | ||
5655 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5656 | Qnil, | |
5657 | doc: /* *Non-nil means to display fringes outside display margins. | |
5658 | A value of nil means to display fringes between margins and buffer text. */); | |
5659 | ||
5660 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5661 | Qnil, | |
5662 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5663 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5664 | ||
5665 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5666 | Qnil, | |
5667 | doc: /* *Position of this buffer's vertical scroll bar. | |
5668 | A value of left or right means to place the vertical scroll bar at that side | |
5669 | of the window; a value of nil means that this window has no vertical scroll bar. | |
5670 | A value of t means to use the vertical scroll bar type from the window's frame. */); | |
5671 | ||
0552666b | 5672 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5673 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5674 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5675 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5676 | window-systems. */); | |
177c0ea7 | 5677 | |
8e8767f8 KS |
5678 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5679 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5680 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
ccbc4331 KS |
5681 | If non-nil, the first and last line of the buffer are marked in the fringe |
5682 | of a window on window-systems with angle bitmaps, or if the window can be | |
5683 | scrolled, the top and bottom line of the window are marked with up and down | |
5684 | arrow bitmaps. | |
b2229037 KS |
5685 | |
5686 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
5687 | are displayed in the left or right fringe, resp. | |
5688 | ||
5689 | If value is an alist, each element (INDICATOR . POSITION) specifies | |
5690 | the position of one of the indicators. INDICATOR is one of `top', | |
5691 | `bottom', `up', `down', or t, which specifies the default position, | |
5692 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5693 | this indicator. | |
5694 | ||
5695 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5696 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
ccbc4331 | 5697 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5698 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
8e8767f8 | 5699 | |
0552666b | 5700 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5701 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5702 | doc: /* How far to scroll windows upward. |
5703 | If you move point off the bottom, the window scrolls automatically. | |
5704 | This variable controls how far it scrolls. nil, the default, | |
5705 | means scroll to center point. A fraction means scroll to put point | |
5706 | that fraction of the window's height from the bottom of the window. | |
5707 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5708 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5709 | point goes at the top, so that in that simple case, the window | |
5710 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5711 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5712 | |
0552666b | 5713 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5714 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5715 | doc: /* How far to scroll windows downward. |
5716 | If you move point off the top, the window scrolls automatically. | |
5717 | This variable controls how far it scrolls. nil, the default, | |
5718 | means scroll to center point. A fraction means scroll to put point | |
5719 | that fraction of the window's height from the top of the window. | |
5720 | When the value is 0.0, point goes at the top line, which in the simple | |
5721 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5722 | point goes at the bottom, so that in that simple case, the window | |
5723 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5724 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5725 | |
1ab256cb RM |
5726 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5727 | "Don't ask."); | |
5728 | */ | |
1ab256cb | 5729 | |
7ee72033 MB |
5730 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5731 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5732 | Two arguments are passed to each function: the positions of |
5733 | the beginning and end of the range of old text to be changed. | |
5734 | \(For an insertion, the beginning and end are at the same place.) | |
5735 | No information is given about the length of the text after the change. | |
5736 | ||
5737 | Buffer changes made while executing the `before-change-functions' | |
5738 | don't call any before-change or after-change functions. | |
5739 | That's because these variables are temporarily set to nil. | |
5740 | As a result, a hook function cannot straightforwardly alter the value of | |
5741 | these variables. See the Emacs Lisp manual for a way of | |
5742 | accomplishing an equivalent result by using other variables. | |
5743 | ||
5744 | If an unhandled error happens in running these functions, | |
5745 | the variable's value remains nil. That prevents the error | |
5746 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5747 | Vbefore_change_functions = Qnil; |
5748 | ||
7ee72033 | 5749 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5750 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5751 | Three arguments are passed to each function: the positions of |
5752 | the beginning and end of the range of changed text, | |
5753 | and the length in bytes of the pre-change text replaced by that range. | |
5754 | \(For an insertion, the pre-change length is zero; | |
5755 | for a deletion, that length is the number of bytes deleted, | |
5756 | and the post-change beginning and end are at the same place.) | |
5757 | ||
5758 | Buffer changes made while executing the `after-change-functions' | |
5759 | don't call any before-change or after-change functions. | |
5760 | That's because these variables are temporarily set to nil. | |
5761 | As a result, a hook function cannot straightforwardly alter the value of | |
5762 | these variables. See the Emacs Lisp manual for a way of | |
5763 | accomplishing an equivalent result by using other variables. | |
5764 | ||
5765 | If an unhandled error happens in running these functions, | |
5766 | the variable's value remains nil. That prevents the error | |
5767 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5768 | Vafter_change_functions = Qnil; |
5769 | ||
7ee72033 | 5770 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5771 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5772 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5773 | Vfirst_change_hook = Qnil; |
1ab256cb | 5774 | |
7ee72033 MB |
5775 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5776 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5777 | Recent changes come first; older changes follow newer. |
5778 | ||
5779 | An entry (BEG . END) represents an insertion which begins at | |
5780 | position BEG and ends at position END. | |
5781 | ||
5782 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5783 | from (abs POSITION). If POSITION is positive, point was at the front | |
5784 | of the text being deleted; if negative, point was at the end. | |
5785 | ||
5786 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5787 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5788 | of the visited file's modification time, as of that time. If the | |
5789 | modification time of the most recent save is different, this entry is | |
5790 | obsolete. | |
5791 | ||
5792 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5793 | was modified between BEG and END. PROPERTY is the property name, | |
5794 | and VALUE is the old value. | |
5795 | ||
5796 | An entry (MARKER . DISTANCE) indicates that the marker MARKER | |
5797 | was adjusted in position by the offset DISTANCE (an integer). | |
5798 | ||
5799 | An entry of the form POSITION indicates that point was at the buffer | |
5800 | location given by the integer. Undoing an entry of this form places | |
5801 | point at POSITION. | |
5802 | ||
5803 | nil marks undo boundaries. The undo command treats the changes | |
5804 | between two undo boundaries as a single step to be undone. | |
5805 | ||
5806 | If the value of the variable is t, undo information is not recorded. */); | |
5807 | ||
7ee72033 MB |
5808 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5809 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5810 | |
7ee72033 MB |
5811 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5812 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5813 | |
5814 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5815 | newlines. Columnar operations (like `move-to-column' and |
5816 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5817 | widths as they go. This works well for ordinary text, but if the |
5818 | buffer's lines are very long (say, more than 500 characters), these | |
5819 | motion functions will take longer to execute. Emacs may also take | |
5820 | longer to update the display. | |
5821 | ||
5629f29b | 5822 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5823 | results of their scans, and consult the cache to avoid rescanning |
5824 | regions of the buffer until the text is modified. The caches are most | |
5825 | beneficial when they prevent the most searching---that is, when the | |
5826 | buffer contains long lines and large regions of characters with the | |
5827 | same, fixed screen width. | |
5828 | ||
5629f29b | 5829 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5830 | become slightly slower (because of the overhead of consulting the |
5831 | cache), and the caches will use memory roughly proportional to the | |
5832 | number of newlines and characters whose screen width varies. | |
5833 | ||
5834 | The caches require no explicit maintenance; their accuracy is | |
5835 | maintained internally by the Emacs primitives. Enabling or disabling | |
5836 | the cache should not affect the behavior of any of the motion | |
5837 | functions; it should only affect their performance. */); | |
5838 | ||
7ee72033 MB |
5839 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5840 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5841 | |
7ee72033 MB |
5842 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5843 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 5844 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5845 | set when a file is visited. */); |
be9aafdd | 5846 | |
71ed49fa LT |
5847 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
5848 | ¤t_buffer->auto_save_file_format, Qnil, | |
5849 | doc: /* *Format in which to write auto-save files. | |
5850 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5851 | If it is t, which is the default, auto-save files are written in the | |
5852 | same format as a regular save would use. */); | |
5853 | ||
3cb719bd | 5854 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
5855 | ¤t_buffer->invisibility_spec, Qnil, |
5856 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
5857 | The default is t, which means that text is invisible |
5858 | if it has a non-nil `invisible' property. | |
5859 | If the value is a list, a text character is invisible if its `invisible' | |
5860 | property is an element in that list. | |
5861 | If an element is a cons cell of the form (PROP . ELLIPSIS), | |
5862 | then characters with property value PROP are invisible, | |
5863 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5864 | |
7962a441 | 5865 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
5866 | ¤t_buffer->display_count, Qnil, |
5867 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 5868 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5869 | |
5870 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
5871 | ¤t_buffer->display_time, Qnil, |
5872 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
5873 | The function `set-window-buffer' updates this variable |
5874 | to the value obtained by calling `current-time'. | |
5875 | If the buffer has never been shown in a window, the value is nil. */); | |
5876 | ||
7ee72033 MB |
5877 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
5878 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
5879 | Non-nil also enables highlighting of the region whenever the mark is active. |
5880 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5a39b770 RS |
5881 | all windows or just the selected window. |
5882 | ||
5883 | If the value is `lambda', that enables Transient Mark mode temporarily | |
5884 | until the next buffer modification. If a command sets the value to `only', | |
b3264fd2 RS |
5885 | that enables Transient Mark mode for the following command only. |
5886 | During that following command, the value of `transient-mark-mode' | |
5887 | is `identity'. If it is still `identity' at the end of that command, | |
5888 | it changes to nil. */); | |
c48f61ef RS |
5889 | Vtransient_mark_mode = Qnil; |
5890 | ||
7ee72033 MB |
5891 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
5892 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
5893 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5894 | text properties. If the value is a list, disregard `buffer-read-only' | |
5895 | and disregard a `read-only' text property if the property value | |
5896 | is a member of the list. */); | |
a96b68f1 RS |
5897 | Vinhibit_read_only = Qnil; |
5898 | ||
7ee72033 | 5899 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
cd8d5236 | 5900 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5901 | Values are interpreted as follows: |
5902 | ||
cd8d5236 RS |
5903 | t use the cursor specified for the frame |
5904 | nil don't display a cursor | |
038c7488 KS |
5905 | box display a filled box cursor |
5906 | hollow display a hollow box cursor | |
6431cf0d KS |
5907 | bar display a vertical bar cursor with default width |
5908 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5629f29b DK |
5909 | hbar display a horizontal bar cursor with default width |
5910 | (hbar . WIDTH) display a horizontal bar cursor with width WIDTH | |
038c7488 | 5911 | ANYTHING ELSE display a hollow box cursor. |
cd8d5236 RS |
5912 | |
5913 | When the buffer is displayed in a nonselected window, | |
5914 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 5915 | |
a3bbced0 | 5916 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
5917 | ¤t_buffer->extra_line_spacing, Qnil, |
5918 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
5919 | The space is measured in pixels, and put below lines on window systems. |
5920 | If value is a floating point number, it specifies the spacing relative | |
5921 | to the default frame line height. */); | |
a3bbced0 | 5922 | |
7ee72033 | 5923 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
efc7e75f | 5924 | doc: /* List of functions called with no args to query before killing a buffer. */); |
dcdffbf6 RS |
5925 | Vkill_buffer_query_functions = Qnil; |
5926 | ||
0dc88e60 | 5927 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
5928 | defsubr (&Sbuffer_list); |
5929 | defsubr (&Sget_buffer); | |
5930 | defsubr (&Sget_file_buffer); | |
5931 | defsubr (&Sget_buffer_create); | |
336cd056 | 5932 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 5933 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
5934 | defsubr (&Sbuffer_name); |
5935 | /*defsubr (&Sbuffer_number);*/ | |
5936 | defsubr (&Sbuffer_file_name); | |
336cd056 | 5937 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 5938 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
5939 | defsubr (&Sbuffer_local_variables); |
5940 | defsubr (&Sbuffer_modified_p); | |
5941 | defsubr (&Sset_buffer_modified_p); | |
5942 | defsubr (&Sbuffer_modified_tick); | |
5943 | defsubr (&Srename_buffer); | |
5944 | defsubr (&Sother_buffer); | |
5945 | defsubr (&Sbuffer_disable_undo); | |
5946 | defsubr (&Sbuffer_enable_undo); | |
5947 | defsubr (&Skill_buffer); | |
a9ee7a59 | 5948 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
5949 | defsubr (&Sswitch_to_buffer); |
5950 | defsubr (&Spop_to_buffer); | |
5951 | defsubr (&Scurrent_buffer); | |
5952 | defsubr (&Sset_buffer); | |
5953 | defsubr (&Sbarf_if_buffer_read_only); | |
5954 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
5955 | defsubr (&Serase_buffer); |
5956 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 5957 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 5958 | |
52f8ec73 | 5959 | defsubr (&Soverlayp); |
2eec3b4e RS |
5960 | defsubr (&Smake_overlay); |
5961 | defsubr (&Sdelete_overlay); | |
5962 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
5963 | defsubr (&Soverlay_start); |
5964 | defsubr (&Soverlay_end); | |
5965 | defsubr (&Soverlay_buffer); | |
5966 | defsubr (&Soverlay_properties); | |
2eec3b4e | 5967 | defsubr (&Soverlays_at); |
74514898 | 5968 | defsubr (&Soverlays_in); |
2eec3b4e | 5969 | defsubr (&Snext_overlay_change); |
239c932b | 5970 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
5971 | defsubr (&Soverlay_recenter); |
5972 | defsubr (&Soverlay_lists); | |
5973 | defsubr (&Soverlay_get); | |
5974 | defsubr (&Soverlay_put); | |
a8c21b48 | 5975 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
5976 | } |
5977 | ||
dfcf069d | 5978 | void |
1ab256cb RM |
5979 | keys_of_buffer () |
5980 | { | |
5981 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
5982 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
5983 | |
5984 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
5985 | initialized when that function gets called. */ | |
5986 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 5987 | } |
ab5796a9 MB |
5988 | |
5989 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
5990 | (do not change this comment) */ |